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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 01:02:30 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 01:02:30 +0000 |
| commit | 76cb841cb886eef6b3bee341a2266c76578724ad (patch) | |
| tree | f5892e5ba6cc11949952a6ce4ecbe6d516d6ce58 /arch/nds32 | |
| parent | Initial commit. (diff) | |
| download | linux-76cb841cb886eef6b3bee341a2266c76578724ad.tar.xz linux-76cb841cb886eef6b3bee341a2266c76578724ad.zip | |
Adding upstream version 4.19.249.upstream/4.19.249
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/nds32')
113 files changed, 11605 insertions, 0 deletions
diff --git a/arch/nds32/Kconfig b/arch/nds32/Kconfig new file mode 100644 index 000000000..7068f3411 --- /dev/null +++ b/arch/nds32/Kconfig @@ -0,0 +1,96 @@ +# +# For a description of the syntax of this configuration file, +# see Documentation/kbuild/kconfig-language.txt. +# + +config NDS32 + def_bool y + select ARCH_HAS_SYNC_DMA_FOR_CPU + select ARCH_HAS_SYNC_DMA_FOR_DEVICE + select ARCH_WANT_FRAME_POINTERS if FTRACE + select CLKSRC_MMIO + select CLONE_BACKWARDS + select COMMON_CLK + select DMA_NONCOHERENT_OPS + select GENERIC_ATOMIC64 + select GENERIC_CPU_DEVICES + select GENERIC_CLOCKEVENTS + select GENERIC_IRQ_CHIP + select GENERIC_IRQ_SHOW + select GENERIC_LIB_ASHLDI3 + select GENERIC_LIB_ASHRDI3 + select GENERIC_LIB_CMPDI2 + select GENERIC_LIB_LSHRDI3 + select GENERIC_LIB_MULDI3 + select GENERIC_LIB_UCMPDI2 + select GENERIC_STRNCPY_FROM_USER + select GENERIC_STRNLEN_USER + select GENERIC_TIME_VSYSCALL + select HANDLE_DOMAIN_IRQ + select HAVE_ARCH_TRACEHOOK + select HAVE_DEBUG_KMEMLEAK + select HAVE_MEMBLOCK + select HAVE_REGS_AND_STACK_ACCESS_API + select IRQ_DOMAIN + select LOCKDEP_SUPPORT + select MODULES_USE_ELF_RELA + select OF + select OF_EARLY_FLATTREE + select NO_BOOTMEM + select NO_IOPORT_MAP + select RTC_LIB + select THREAD_INFO_IN_TASK + select HAVE_FUNCTION_TRACER + select HAVE_FUNCTION_GRAPH_TRACER + select HAVE_FTRACE_MCOUNT_RECORD + select HAVE_DYNAMIC_FTRACE + help + Andes(nds32) Linux support. + +config GENERIC_CALIBRATE_DELAY + def_bool y + +config GENERIC_CSUM + def_bool y + +config GENERIC_HWEIGHT + def_bool y + +config GENERIC_LOCKBREAK + def_bool y + depends on PREEMPT + +config RWSEM_GENERIC_SPINLOCK + def_bool y + +config TRACE_IRQFLAGS_SUPPORT + def_bool y + +config STACKTRACE_SUPPORT + def_bool y + +config FIX_EARLYCON_MEM + def_bool y + +config PGTABLE_LEVELS + default 2 + +menu "System Type" +source "arch/nds32/Kconfig.cpu" +config NR_CPUS + int + default 1 + +config MMU + def_bool y + +config NDS32_BUILTIN_DTB + string "Builtin DTB" + default "" + help + User can use it to specify the dts of the SoC +endmenu + +menu "Kernel Features" +source "kernel/Kconfig.hz" +endmenu diff --git a/arch/nds32/Kconfig.cpu b/arch/nds32/Kconfig.cpu new file mode 100644 index 000000000..b8c8984d1 --- /dev/null +++ b/arch/nds32/Kconfig.cpu @@ -0,0 +1,175 @@ +comment "Processor Features" + +config CPU_BIG_ENDIAN + def_bool !CPU_LITTLE_ENDIAN + +config CPU_LITTLE_ENDIAN + bool "Little endian" + default y + +config HWZOL + bool "hardware zero overhead loop support" + depends on CPU_D10 || CPU_D15 + default n + help + A set of Zero-Overhead Loop mechanism is provided to reduce the + instruction fetch and execution overhead of loop-control instructions. + It will save 3 registers($LB, $LC, $LE) for context saving if say Y. + You don't need to save these registers if you can make sure your user + program doesn't use these registers. + + If unsure, say N. + +config CPU_CACHE_ALIASING + bool "Aliasing cache" + depends on CPU_N10 || CPU_D10 || CPU_N13 || CPU_V3 + default y + help + If this CPU is using VIPT data cache and its cache way size is larger + than page size, say Y. If it is using PIPT data cache, say N. + + If unsure, say Y. + +choice + prompt "minimum CPU type" + default CPU_V3 + help + The data cache of N15/D15 is implemented as PIPT and it will not cause + the cache aliasing issue. The rest cpus(N13, N10 and D10) are + implemented as VIPT data cache. It may cause the cache aliasing issue + if its cache way size is larger than page size. You can specify the + CPU type direcly or choose CPU_V3 if unsure. + + A kernel built for N10 is able to run on N15, D15, N13, N10 or D10. + A kernel built for N15 is able to run on N15 or D15. + A kernel built for D10 is able to run on D10 or D15. + A kernel built for D15 is able to run on D15. + A kernel built for N13 is able to run on N15, N13 or D15. + +config CPU_N15 + bool "AndesCore N15" +config CPU_N13 + bool "AndesCore N13" + select CPU_CACHE_ALIASING if ANDES_PAGE_SIZE_4KB +config CPU_N10 + bool "AndesCore N10" + select CPU_CACHE_ALIASING +config CPU_D15 + bool "AndesCore D15" +config CPU_D10 + bool "AndesCore D10" + select CPU_CACHE_ALIASING +config CPU_V3 + bool "AndesCore v3 compatible" + select CPU_CACHE_ALIASING +endchoice +choice + prompt "Paging -- page size " + default ANDES_PAGE_SIZE_4KB +config ANDES_PAGE_SIZE_4KB + bool "use 4KB page size" +config ANDES_PAGE_SIZE_8KB + bool "use 8KB page size" +endchoice + +config CPU_ICACHE_DISABLE + bool "Disable I-Cache" + help + Say Y here to disable the processor instruction cache. Unless + you have a reason not to or are unsure, say N. + +config CPU_DCACHE_DISABLE + bool "Disable D-Cache" + help + Say Y here to disable the processor data cache. Unless + you have a reason not to or are unsure, say N. + +config CPU_DCACHE_WRITETHROUGH + bool "Force write through D-cache" + depends on !CPU_DCACHE_DISABLE + help + Say Y here to use the data cache in writethrough mode. Unless you + specifically require this or are unsure, say N. + +config WBNA + bool "WBNA" + default n + help + Say Y here to enable write-back memory with no-write-allocation policy. + +config ALIGNMENT_TRAP + bool "Kernel support unaligned access handling by sw" + depends on PROC_FS + default n + help + Andes processors cannot load/store information which is not + naturally aligned on the bus, i.e., a 4 byte load must start at an + address divisible by 4. On 32-bit Andes processors, these non-aligned + load/store instructions will be emulated in software if you say Y + here, which has a severe performance impact. With an IP-only + configuration it is safe to say N, otherwise say Y. + +config HW_SUPPORT_UNALIGNMENT_ACCESS + bool "Kernel support unaligned access handling by hw" + depends on !ALIGNMENT_TRAP + default n + help + Andes processors load/store world/half-word instructions can access + unaligned memory locations without generating the Data Alignment + Check exceptions. With an IP-only configuration it is safe to say N, + otherwise say Y. + +config HIGHMEM + bool "High Memory Support" + depends on MMU && !CPU_CACHE_ALIASING + help + The address space of Andes processors is only 4 Gigabytes large + and it has to accommodate user address space, kernel address + space as well as some memory mapped IO. That means that, if you + have a large amount of physical memory and/or IO, not all of the + memory can be "permanently mapped" by the kernel. The physical + memory that is not permanently mapped is called "high memory". + + Depending on the selected kernel/user memory split, minimum + vmalloc space and actual amount of RAM, you may not need this + option which should result in a slightly faster kernel. + + If unsure, say N. + +config CACHE_L2 + bool "Support L2 cache" + default y + help + Say Y here to enable L2 cache if your SoC are integrated with L2CC. + If unsure, say N. + +menu "Memory configuration" + +choice + prompt "Memory split" + depends on MMU + default VMSPLIT_3G_OPT + help + Select the desired split between kernel and user memory. + + If you are not absolutely sure what you are doing, leave this + option alone! + + config VMSPLIT_3G + bool "3G/1G user/kernel split" + config VMSPLIT_3G_OPT + bool "3G/1G user/kernel split (for full 1G low memory)" + config VMSPLIT_2G + bool "2G/2G user/kernel split" + config VMSPLIT_1G + bool "1G/3G user/kernel split" +endchoice + +config PAGE_OFFSET + hex + default 0x40000000 if VMSPLIT_1G + default 0x80000000 if VMSPLIT_2G + default 0xB0000000 if VMSPLIT_3G_OPT + default 0xC0000000 + +endmenu diff --git a/arch/nds32/Kconfig.debug b/arch/nds32/Kconfig.debug new file mode 100644 index 000000000..22a162cd9 --- /dev/null +++ b/arch/nds32/Kconfig.debug @@ -0,0 +1 @@ +# dummy file, do not delete diff --git a/arch/nds32/Makefile b/arch/nds32/Makefile new file mode 100644 index 000000000..3509fac10 --- /dev/null +++ b/arch/nds32/Makefile @@ -0,0 +1,74 @@ +LDFLAGS_vmlinux := --no-undefined -X +OBJCOPYFLAGS := -O binary -R .note -R .note.gnu.build-id -R .comment -S + +KBUILD_DEFCONFIG := defconfig + +comma = , + +ifdef CONFIG_FUNCTION_TRACER +arch-y += -malways-save-lp -mno-relax +endif + +KBUILD_CFLAGS += $(call cc-option, -mno-sched-prolog-epilog) +KBUILD_CFLAGS += -mcmodel=large + +KBUILD_CFLAGS +=$(arch-y) $(tune-y) +KBUILD_AFLAGS +=$(arch-y) $(tune-y) + +#Default value +head-y := arch/nds32/kernel/head.o +textaddr-y := $(CONFIG_PAGE_OFFSET)+0xc000 + +TEXTADDR := $(textaddr-y) + +export TEXTADDR + + +# If we have a machine-specific directory, then include it in the build. +core-y += arch/nds32/kernel/ arch/nds32/mm/ +libs-y += arch/nds32/lib/ + +ifneq '$(CONFIG_NDS32_BUILTIN_DTB)' '""' +BUILTIN_DTB := y +else +BUILTIN_DTB := n +endif + +ifdef CONFIG_CPU_LITTLE_ENDIAN +KBUILD_CFLAGS += $(call cc-option, -EL) +KBUILD_AFLAGS += $(call cc-option, -EL) +KBUILD_LDFLAGS += $(call cc-option, -EL) +CHECKFLAGS += -D__NDS32_EL__ +else +KBUILD_CFLAGS += $(call cc-option, -EB) +KBUILD_AFLAGS += $(call cc-option, -EB) +KBUILD_LDFLAGS += $(call cc-option, -EB) +CHECKFLAGS += -D__NDS32_EB__ +endif + +boot := arch/nds32/boot +core-$(BUILTIN_DTB) += $(boot)/dts/ + +.PHONY: FORCE + +Image: vmlinux + $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@ + + +PHONY += vdso_install +vdso_install: + $(Q)$(MAKE) $(build)=arch/nds32/kernel/vdso $@ + +prepare: vdso_prepare +vdso_prepare: prepare0 + $(Q)$(MAKE) $(build)=arch/nds32/kernel/vdso include/generated/vdso-offsets.h + +CLEAN_FILES += include/asm-nds32/constants.h* + +# We use MRPROPER_FILES and CLEAN_FILES now +archclean: + $(Q)$(MAKE) $(clean)=$(boot) + +define archhelp + echo ' Image - kernel image (arch/$(ARCH)/boot/Image)' +endef diff --git a/arch/nds32/boot/Makefile b/arch/nds32/boot/Makefile new file mode 100644 index 000000000..3f9b86f68 --- /dev/null +++ b/arch/nds32/boot/Makefile @@ -0,0 +1,15 @@ +targets := Image Image.gz + +$(obj)/Image: vmlinux FORCE + $(call if_changed,objcopy) + +$(obj)/Image.gz: $(obj)/Image FORCE + $(call if_changed,gzip) + +install: $(obj)/Image + $(CONFIG_SHELL) $(srctree)/$(src)/install.sh $(KERNELRELEASE) \ + $(obj)/Image System.map "$(INSTALL_PATH)" + +zinstall: $(obj)/Image.gz + $(CONFIG_SHELL) $(srctree)/$(src)/install.sh $(KERNELRELEASE) \ + $(obj)/Image.gz System.map "$(INSTALL_PATH)" diff --git a/arch/nds32/boot/dts/Makefile b/arch/nds32/boot/dts/Makefile new file mode 100644 index 000000000..d31faa8a1 --- /dev/null +++ b/arch/nds32/boot/dts/Makefile @@ -0,0 +1,8 @@ +ifneq '$(CONFIG_NDS32_BUILTIN_DTB)' '""' +BUILTIN_DTB := $(patsubst "%",%,$(CONFIG_NDS32_BUILTIN_DTB)).dtb.o +else +BUILTIN_DTB := +endif +obj-$(CONFIG_OF) += $(BUILTIN_DTB) + +clean-files := *.dtb *.dtb.S diff --git a/arch/nds32/boot/dts/ae3xx.dts b/arch/nds32/boot/dts/ae3xx.dts new file mode 100644 index 000000000..bb39749a6 --- /dev/null +++ b/arch/nds32/boot/dts/ae3xx.dts @@ -0,0 +1,85 @@ +/dts-v1/; +/ { + compatible = "andestech,ae3xx"; + #address-cells = <1>; + #size-cells = <1>; + interrupt-parent = <&intc>; + + chosen { + stdout-path = &serial0; + }; + + memory@0 { + device_type = "memory"; + reg = <0x00000000 0x40000000>; + }; + + cpus { + #address-cells = <1>; + #size-cells = <0>; + cpu@0 { + device_type = "cpu"; + compatible = "andestech,n13", "andestech,nds32v3"; + reg = <0>; + clock-frequency = <60000000>; + next-level-cache = <&L2>; + }; + }; + + intc: interrupt-controller { + compatible = "andestech,ativic32"; + #interrupt-cells = <1>; + interrupt-controller; + }; + + clock: clk { + #clock-cells = <0>; + compatible = "fixed-clock"; + clock-frequency = <30000000>; + }; + + apb { + compatible = "simple-bus"; + #address-cells = <1>; + #size-cells = <1>; + ranges; + + serial0: serial@f0300000 { + compatible = "andestech,uart16550", "ns16550a"; + reg = <0xf0300000 0x1000>; + interrupts = <8>; + clock-frequency = <14745600>; + reg-shift = <2>; + reg-offset = <32>; + no-loopback-test = <1>; + }; + + timer0: timer@f0400000 { + compatible = "andestech,atcpit100"; + reg = <0xf0400000 0x1000>; + interrupts = <2>; + clocks = <&clock>; + clock-names = "PCLK"; + }; + }; + + ahb { + compatible = "simple-bus"; + #address-cells = <1>; + #size-cells = <1>; + ranges; + + L2: cache-controller@e0500000 { + compatible = "andestech,atl2c"; + reg = <0xe0500000 0x1000>; + cache-unified; + cache-level = <2>; + }; + + mac0: ethernet@e0100000 { + compatible = "andestech,atmac100"; + reg = <0xe0100000 0x1000>; + interrupts = <18>; + }; + }; +}; diff --git a/arch/nds32/configs/defconfig b/arch/nds32/configs/defconfig new file mode 100644 index 000000000..2546d8770 --- /dev/null +++ b/arch/nds32/configs/defconfig @@ -0,0 +1,104 @@ +CONFIG_CROSS_COMPILE="nds32le-linux-" +CONFIG_SYSVIPC=y +CONFIG_POSIX_MQUEUE=y +CONFIG_HIGH_RES_TIMERS=y +CONFIG_BSD_PROCESS_ACCT=y +CONFIG_BSD_PROCESS_ACCT_V3=y +CONFIG_IKCONFIG=y +CONFIG_IKCONFIG_PROC=y +CONFIG_LOG_BUF_SHIFT=14 +CONFIG_USER_NS=y +CONFIG_RELAY=y +CONFIG_BLK_DEV_INITRD=y +CONFIG_KALLSYMS_ALL=y +CONFIG_PROFILING=y +CONFIG_MODULES=y +CONFIG_MODULE_UNLOAD=y +# CONFIG_BLK_DEV_BSG is not set +# CONFIG_CACHE_L2 is not set +CONFIG_PREEMPT=y +# CONFIG_COMPACTION is not set +CONFIG_HZ_100=y +# CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is not set +CONFIG_NET=y +CONFIG_PACKET=y +CONFIG_UNIX=y +CONFIG_NET_KEY=y +CONFIG_INET=y +CONFIG_IP_MULTICAST=y +# CONFIG_INET_XFRM_MODE_TRANSPORT is not set +# CONFIG_INET_XFRM_MODE_TUNNEL is not set +# CONFIG_INET_XFRM_MODE_BEET is not set +# CONFIG_INET_DIAG is not set +# CONFIG_IPV6 is not set +# CONFIG_BLK_DEV is not set +CONFIG_NETDEVICES=y +# CONFIG_NET_CADENCE is not set +# CONFIG_NET_VENDOR_BROADCOM is not set +CONFIG_FTMAC100=y +# CONFIG_NET_VENDOR_INTEL is not set +# CONFIG_NET_VENDOR_MARVELL is not set +# CONFIG_NET_VENDOR_MICREL is not set +# CONFIG_NET_VENDOR_NATSEMI is not set +# CONFIG_NET_VENDOR_SEEQ is not set +# CONFIG_NET_VENDOR_STMICRO is not set +# CONFIG_NET_VENDOR_WIZNET is not set +CONFIG_INPUT_EVDEV=y +# CONFIG_INPUT_KEYBOARD is not set +# CONFIG_INPUT_MOUSE is not set +CONFIG_INPUT_TOUCHSCREEN=y +# CONFIG_SERIO is not set +CONFIG_VT_HW_CONSOLE_BINDING=y +CONFIG_SERIAL_8250=y +# CONFIG_SERIAL_8250_DEPRECATED_OPTIONS is not set +CONFIG_SERIAL_8250_CONSOLE=y +CONFIG_SERIAL_8250_NR_UARTS=3 +CONFIG_SERIAL_8250_RUNTIME_UARTS=3 +CONFIG_SERIAL_OF_PLATFORM=y +# CONFIG_HW_RANDOM is not set +# CONFIG_HWMON is not set +# CONFIG_HID_A4TECH is not set +# CONFIG_HID_APPLE is not set +# CONFIG_HID_BELKIN is not set +# CONFIG_HID_CHERRY is not set +# CONFIG_HID_CHICONY is not set +# CONFIG_HID_CYPRESS is not set +# CONFIG_HID_EZKEY is not set +# CONFIG_HID_ITE is not set +# CONFIG_HID_KENSINGTON is not set +# CONFIG_HID_LOGITECH is not set +# CONFIG_HID_MICROSOFT is not set +# CONFIG_HID_MONTEREY is not set +# CONFIG_USB_SUPPORT is not set +CONFIG_GENERIC_PHY=y +CONFIG_EXT4_FS=y +CONFIG_EXT4_FS_POSIX_ACL=y +CONFIG_EXT4_FS_SECURITY=y +CONFIG_EXT4_ENCRYPTION=y +CONFIG_FUSE_FS=y +CONFIG_MSDOS_FS=y +CONFIG_VFAT_FS=y +CONFIG_TMPFS=y +CONFIG_TMPFS_POSIX_ACL=y +CONFIG_CONFIGFS_FS=y +CONFIG_NFS_FS=y +CONFIG_NFS_V3_ACL=y +CONFIG_NFS_V4=y +CONFIG_NFS_V4_1=y +CONFIG_NFS_USE_LEGACY_DNS=y +CONFIG_NLS_CODEPAGE_437=y +CONFIG_NLS_ISO8859_1=y +CONFIG_DEBUG_INFO=y +CONFIG_DEBUG_INFO_DWARF4=y +CONFIG_GDB_SCRIPTS=y +CONFIG_READABLE_ASM=y +CONFIG_HEADERS_CHECK=y +CONFIG_DEBUG_SECTION_MISMATCH=y +CONFIG_MAGIC_SYSRQ=y +CONFIG_DEBUG_KERNEL=y +CONFIG_PANIC_ON_OOPS=y +# CONFIG_SCHED_DEBUG is not set +# CONFIG_DEBUG_PREEMPT is not set +CONFIG_STACKTRACE=y +CONFIG_RCU_CPU_STALL_TIMEOUT=300 +# CONFIG_CRYPTO_HW is not set diff --git a/arch/nds32/include/asm/Kbuild b/arch/nds32/include/asm/Kbuild new file mode 100644 index 000000000..dbc4e5422 --- /dev/null +++ b/arch/nds32/include/asm/Kbuild @@ -0,0 +1,59 @@ +generic-y += asm-offsets.h +generic-y += atomic.h +generic-y += bitops.h +generic-y += bitsperlong.h +generic-y += bpf_perf_event.h +generic-y += bug.h +generic-y += bugs.h +generic-y += checksum.h +generic-y += clkdev.h +generic-y += cmpxchg.h +generic-y += cmpxchg-local.h +generic-y += compat.h +generic-y += cputime.h +generic-y += device.h +generic-y += div64.h +generic-y += dma.h +generic-y += dma-mapping.h +generic-y += emergency-restart.h +generic-y += errno.h +generic-y += exec.h +generic-y += export.h +generic-y += fb.h +generic-y += fcntl.h +generic-y += ftrace.h +generic-y += gpio.h +generic-y += hardirq.h +generic-y += hw_irq.h +generic-y += ioctl.h +generic-y += ioctls.h +generic-y += irq.h +generic-y += irq_regs.h +generic-y += irq_work.h +generic-y += kdebug.h +generic-y += kmap_types.h +generic-y += kprobes.h +generic-y += kvm_para.h +generic-y += limits.h +generic-y += local.h +generic-y += mm-arch-hooks.h +generic-y += mman.h +generic-y += parport.h +generic-y += pci.h +generic-y += percpu.h +generic-y += preempt.h +generic-y += sections.h +generic-y += segment.h +generic-y += serial.h +generic-y += shmbuf.h +generic-y += sizes.h +generic-y += stat.h +generic-y += switch_to.h +generic-y += timex.h +generic-y += topology.h +generic-y += trace_clock.h +generic-y += xor.h +generic-y += unaligned.h +generic-y += user.h +generic-y += vga.h +generic-y += word-at-a-time.h diff --git a/arch/nds32/include/asm/assembler.h b/arch/nds32/include/asm/assembler.h new file mode 100644 index 000000000..c3855782a --- /dev/null +++ b/arch/nds32/include/asm/assembler.h @@ -0,0 +1,39 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#ifndef __NDS32_ASSEMBLER_H__ +#define __NDS32_ASSEMBLER_H__ + +.macro gie_disable + setgie.d + dsb +.endm + +.macro gie_enable + setgie.e + dsb +.endm + +.macro gie_save oldpsw + mfsr \oldpsw, $ir0 + setgie.d + dsb +.endm + +.macro gie_restore oldpsw + andi \oldpsw, \oldpsw, #0x1 + beqz \oldpsw, 7001f + setgie.e + dsb +7001: +.endm + + +#define USER(insn, reg, addr, opr) \ +9999: insn reg, addr, opr; \ + .section __ex_table,"a"; \ + .align 3; \ + .long 9999b, 9001f; \ + .previous + +#endif /* __NDS32_ASSEMBLER_H__ */ diff --git a/arch/nds32/include/asm/barrier.h b/arch/nds32/include/asm/barrier.h new file mode 100644 index 000000000..faafc373e --- /dev/null +++ b/arch/nds32/include/asm/barrier.h @@ -0,0 +1,15 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#ifndef __NDS32_ASM_BARRIER_H +#define __NDS32_ASM_BARRIER_H + +#ifndef __ASSEMBLY__ +#define mb() asm volatile("msync all":::"memory") +#define rmb() asm volatile("msync all":::"memory") +#define wmb() asm volatile("msync store":::"memory") +#include <asm-generic/barrier.h> + +#endif /* __ASSEMBLY__ */ + +#endif /* __NDS32_ASM_BARRIER_H */ diff --git a/arch/nds32/include/asm/bitfield.h b/arch/nds32/include/asm/bitfield.h new file mode 100644 index 000000000..19b284121 --- /dev/null +++ b/arch/nds32/include/asm/bitfield.h @@ -0,0 +1,964 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#ifndef __NDS32_BITFIELD_H__ +#define __NDS32_BITFIELD_H__ +/****************************************************************************** + * cr0: CPU_VER (CPU Version Register) + *****************************************************************************/ +#define CPU_VER_offCFGID 0 /* Minor configuration */ +#define CPU_VER_offREV 16 /* Revision of the CPU version */ +#define CPU_VER_offCPUID 24 /* Major CPU versions */ + +#define CPU_VER_mskCFGID ( 0xFFFF << CPU_VER_offCFGID ) +#define CPU_VER_mskREV ( 0xFF << CPU_VER_offREV ) +#define CPU_VER_mskCPUID ( 0xFF << CPU_VER_offCPUID ) + +/****************************************************************************** + * cr1: ICM_CFG (Instruction Cache/Memory Configuration Register) + *****************************************************************************/ +#define ICM_CFG_offISET 0 /* I-cache sets (# of cache lines) per way */ +#define ICM_CFG_offIWAY 3 /* I-cache ways */ +#define ICM_CFG_offISZ 6 /* I-cache line size */ +#define ICM_CFG_offILCK 9 /* I-cache locking support */ +#define ICM_CFG_offILMB 10 /* On-chip ILM banks */ +#define ICM_CFG_offBSAV 13 /* ILM base register alignment version */ +/* bit 15:31 reserved */ + +#define ICM_CFG_mskISET ( 0x7 << ICM_CFG_offISET ) +#define ICM_CFG_mskIWAY ( 0x7 << ICM_CFG_offIWAY ) +#define ICM_CFG_mskISZ ( 0x7 << ICM_CFG_offISZ ) +#define ICM_CFG_mskILCK ( 0x1 << ICM_CFG_offILCK ) +#define ICM_CFG_mskILMB ( 0x7 << ICM_CFG_offILMB ) +#define ICM_CFG_mskBSAV ( 0x3 << ICM_CFG_offBSAV ) + +/****************************************************************************** + * cr2: DCM_CFG (Data Cache/Memory Configuration Register) + *****************************************************************************/ +#define DCM_CFG_offDSET 0 /* D-cache sets (# of cache lines) per way */ +#define DCM_CFG_offDWAY 3 /* D-cache ways */ +#define DCM_CFG_offDSZ 6 /* D-cache line size */ +#define DCM_CFG_offDLCK 9 /* D-cache locking support */ +#define DCM_CFG_offDLMB 10 /* On-chip DLM banks */ +#define DCM_CFG_offBSAV 13 /* DLM base register alignment version */ +/* bit 15:31 reserved */ + +#define DCM_CFG_mskDSET ( 0x7 << DCM_CFG_offDSET ) +#define DCM_CFG_mskDWAY ( 0x7 << DCM_CFG_offDWAY ) +#define DCM_CFG_mskDSZ ( 0x7 << DCM_CFG_offDSZ ) +#define DCM_CFG_mskDLCK ( 0x1 << DCM_CFG_offDLCK ) +#define DCM_CFG_mskDLMB ( 0x7 << DCM_CFG_offDLMB ) +#define DCM_CFG_mskBSAV ( 0x3 << DCM_CFG_offBSAV ) + +/****************************************************************************** + * cr3: MMU_CFG (MMU Configuration Register) + *****************************************************************************/ +#define MMU_CFG_offMMPS 0 /* Memory management protection scheme */ +#define MMU_CFG_offMMPV 2 /* Memory management protection version number */ +#define MMU_CFG_offFATB 7 /* Fully-associative or non-fully-associative TLB */ + +#define MMU_CFG_offTBW 8 /* TLB ways(non-associative) TBS */ +#define MMU_CFG_offTBS 11 /* TLB sets per way(non-associative) TBS */ +/* bit 14:14 reserved */ + +#define MMU_CFG_offEP8MIN4 15 /* 8KB page supported while minimum page is 4KB */ +#define MMU_CFG_offfEPSZ 16 /* Extra page size supported */ +#define MMU_CFG_offTLBLCK 24 /* TLB locking support */ +#define MMU_CFG_offHPTWK 25 /* Hardware Page Table Walker implemented */ +#define MMU_CFG_offDE 26 /* Default endian */ +#define MMU_CFG_offNTPT 27 /* Partitions for non-translated attributes */ +#define MMU_CFG_offIVTB 28 /* Invisible TLB */ +#define MMU_CFG_offVLPT 29 /* VLPT for fast TLB fill handling implemented */ +#define MMU_CFG_offNTME 30 /* Non-translated VA to PA mapping */ +/* bit 31 reserved */ + +#define MMU_CFG_mskMMPS ( 0x3 << MMU_CFG_offMMPS ) +#define MMU_CFG_mskMMPV ( 0x1F << MMU_CFG_offMMPV ) +#define MMU_CFG_mskFATB ( 0x1 << MMU_CFG_offFATB ) +#define MMU_CFG_mskTBW ( 0x7 << MMU_CFG_offTBW ) +#define MMU_CFG_mskTBS ( 0x7 << MMU_CFG_offTBS ) +#define MMU_CFG_mskEP8MIN4 ( 0x1 << MMU_CFG_offEP8MIN4 ) +#define MMU_CFG_mskfEPSZ ( 0xFF << MMU_CFG_offfEPSZ ) +#define MMU_CFG_mskTLBLCK ( 0x1 << MMU_CFG_offTLBLCK ) +#define MMU_CFG_mskHPTWK ( 0x1 << MMU_CFG_offHPTWK ) +#define MMU_CFG_mskDE ( 0x1 << MMU_CFG_offDE ) +#define MMU_CFG_mskNTPT ( 0x1 << MMU_CFG_offNTPT ) +#define MMU_CFG_mskIVTB ( 0x1 << MMU_CFG_offIVTB ) +#define MMU_CFG_mskVLPT ( 0x1 << MMU_CFG_offVLPT ) +#define MMU_CFG_mskNTME ( 0x1 << MMU_CFG_offNTME ) + +/****************************************************************************** + * cr4: MSC_CFG (Misc Configuration Register) + *****************************************************************************/ +#define MSC_CFG_offEDM 0 +#define MSC_CFG_offLMDMA 1 +#define MSC_CFG_offPFM 2 +#define MSC_CFG_offHSMP 3 +#define MSC_CFG_offTRACE 4 +#define MSC_CFG_offDIV 5 +#define MSC_CFG_offMAC 6 +#define MSC_CFG_offAUDIO 7 +#define MSC_CFG_offL2C 9 +#define MSC_CFG_offRDREG 10 +#define MSC_CFG_offADR24 11 +#define MSC_CFG_offINTLC 12 +#define MSC_CFG_offBASEV 13 +#define MSC_CFG_offNOD 16 +/* bit 13:31 reserved */ + +#define MSC_CFG_mskEDM ( 0x1 << MSC_CFG_offEDM ) +#define MSC_CFG_mskLMDMA ( 0x1 << MSC_CFG_offLMDMA ) +#define MSC_CFG_mskPFM ( 0x1 << MSC_CFG_offPFM ) +#define MSC_CFG_mskHSMP ( 0x1 << MSC_CFG_offHSMP ) +#define MSC_CFG_mskTRACE ( 0x1 << MSC_CFG_offTRACE ) +#define MSC_CFG_mskDIV ( 0x1 << MSC_CFG_offDIV ) +#define MSC_CFG_mskMAC ( 0x1 << MSC_CFG_offMAC ) +#define MSC_CFG_mskAUDIO ( 0x3 << MSC_CFG_offAUDIO ) +#define MSC_CFG_mskL2C ( 0x1 << MSC_CFG_offL2C ) +#define MSC_CFG_mskRDREG ( 0x1 << MSC_CFG_offRDREG ) +#define MSC_CFG_mskADR24 ( 0x1 << MSC_CFG_offADR24 ) +#define MSC_CFG_mskINTLC ( 0x1 << MSC_CFG_offINTLC ) +#define MSC_CFG_mskBASEV ( 0x7 << MSC_CFG_offBASEV ) +#define MSC_CFG_mskNOD ( 0x1 << MSC_CFG_offNOD ) + +/****************************************************************************** + * cr5: CORE_CFG (Core Identification Register) + *****************************************************************************/ +#define CORE_ID_offCOREID 0 +/* bit 4:31 reserved */ + +#define CORE_ID_mskCOREID ( 0xF << CORE_ID_offCOREID ) + +/****************************************************************************** + * cr6: FUCOP_EXIST (FPU and Coprocessor Existence Configuration Register) + *****************************************************************************/ +#define FUCOP_EXIST_offCP0EX 0 +#define FUCOP_EXIST_offCP1EX 1 +#define FUCOP_EXIST_offCP2EX 2 +#define FUCOP_EXIST_offCP3EX 3 +#define FUCOP_EXIST_offCP0ISFPU 31 + +#define FUCOP_EXIST_mskCP0EX ( 0x1 << FUCOP_EXIST_offCP0EX ) +#define FUCOP_EXIST_mskCP1EX ( 0x1 << FUCOP_EXIST_offCP1EX ) +#define FUCOP_EXIST_mskCP2EX ( 0x1 << FUCOP_EXIST_offCP2EX ) +#define FUCOP_EXIST_mskCP3EX ( 0x1 << FUCOP_EXIST_offCP3EX ) +#define FUCOP_EXIST_mskCP0ISFPU ( 0x1 << FUCOP_EXIST_offCP0ISFPU ) + +/****************************************************************************** + * ir0: PSW (Processor Status Word Register) + * ir1: IPSW (Interruption PSW Register) + * ir2: P_IPSW (Previous IPSW Register) + *****************************************************************************/ +#define PSW_offGIE 0 /* Global Interrupt Enable */ +#define PSW_offINTL 1 /* Interruption Stack Level */ +#define PSW_offPOM 3 /* Processor Operation Mode, User/Superuser */ +#define PSW_offBE 5 /* Endianness for data memory access, 1:MSB, 0:LSB */ +#define PSW_offIT 6 /* Enable instruction address translation */ +#define PSW_offDT 7 /* Enable data address translation */ +#define PSW_offIME 8 /* Instruction Machine Error flag */ +#define PSW_offDME 9 /* Data Machine Error flag */ +#define PSW_offDEX 10 /* Debug Exception */ +#define PSW_offHSS 11 /* Hardware Single Stepping */ +#define PSW_offDRBE 12 /* Device Register Endian Mode */ +#define PSW_offAEN 13 /* Audio ISA special feature */ +#define PSW_offWBNA 14 /* Write Back Non-Allocate */ +#define PSW_offIFCON 15 /* IFC On */ +#define PSW_offCPL 16 /* Current Priority Level */ +/* bit 19:31 reserved */ + +#define PSW_mskGIE ( 0x1 << PSW_offGIE ) +#define PSW_mskINTL ( 0x3 << PSW_offINTL ) +#define PSW_mskPOM ( 0x3 << PSW_offPOM ) +#define PSW_mskBE ( 0x1 << PSW_offBE ) +#define PSW_mskIT ( 0x1 << PSW_offIT ) +#define PSW_mskDT ( 0x1 << PSW_offDT ) +#define PSW_mskIME ( 0x1 << PSW_offIME ) +#define PSW_mskDME ( 0x1 << PSW_offDME ) +#define PSW_mskDEX ( 0x1 << PSW_offDEX ) +#define PSW_mskHSS ( 0x1 << PSW_offHSS ) +#define PSW_mskDRBE ( 0x1 << PSW_offDRBE ) +#define PSW_mskAEN ( 0x1 << PSW_offAEN ) +#define PSW_mskWBNA ( 0x1 << PSW_offWBNA ) +#define PSW_mskIFCON ( 0x1 << PSW_offIFCON ) +#define PSW_mskCPL ( 0x7 << PSW_offCPL ) + +#define PSW_SYSTEM ( 1 << PSW_offPOM ) +#define PSW_INTL_1 ( 1 << PSW_offINTL ) +#define PSW_CPL_NO ( 0 << PSW_offCPL ) +#define PSW_CPL_ANY ( 7 << PSW_offCPL ) + +#define PSW_clr (PSW_mskGIE|PSW_mskINTL|PSW_mskPOM|PSW_mskIT|PSW_mskDT|PSW_mskIME|PSW_mskWBNA) +#ifdef __NDS32_EB__ +#ifdef CONFIG_WBNA +#define PSW_init (PSW_mskWBNA|(1<<PSW_offINTL)|(1<<PSW_offPOM)|PSW_mskIT|PSW_mskDT|PSW_mskBE) +#else +#define PSW_init ((1<<PSW_offINTL)|(1<<PSW_offPOM)|PSW_mskIT|PSW_mskDT|PSW_mskBE) +#endif +#else +#ifdef CONFIG_WBNA +#define PSW_init (PSW_mskWBNA|(1<<PSW_offINTL)|(1<<PSW_offPOM)|PSW_mskIT|PSW_mskDT) +#else +#define PSW_init ((1<<PSW_offINTL)|(1<<PSW_offPOM)|PSW_mskIT|PSW_mskDT) +#endif +#endif +/****************************************************************************** + * ir3: IVB (Interruption Vector Base Register) + *****************************************************************************/ +/* bit 0:12 reserved */ +#define IVB_offNIVIC 1 /* Number of input for IVIC Controller */ +#define IVB_offIVIC_VER 11 /* IVIC Version */ +#define IVB_offEVIC 13 /* External Vector Interrupt Controller mode */ +#define IVB_offESZ 14 /* Size of each vector entry */ +#define IVB_offIVBASE 16 /* BasePA of interrupt vector table */ + +#define IVB_mskNIVIC ( 0x7 << IVB_offNIVIC ) +#define IVB_mskIVIC_VER ( 0x3 << IVB_offIVIC_VER ) +#define IVB_mskEVIC ( 0x1 << IVB_offEVIC ) +#define IVB_mskESZ ( 0x3 << IVB_offESZ ) +#define IVB_mskIVBASE ( 0xFFFF << IVB_offIVBASE ) + +#define IVB_valESZ4 0 +#define IVB_valESZ16 1 +#define IVB_valESZ64 2 +#define IVB_valESZ256 3 +/****************************************************************************** + * ir4: EVA (Exception Virtual Address Register) + * ir5: P_EVA (Previous EVA Register) + *****************************************************************************/ + + /* This register contains the VA that causes the exception */ + +/****************************************************************************** + * ir6: ITYPE (Interruption Type Register) + * ir7: P_ITYPE (Previous ITYPE Register) + *****************************************************************************/ +#define ITYPE_offETYPE 0 /* Exception Type */ +#define ITYPE_offINST 4 /* Exception caused by insn fetch or data access */ +/* bit 5:15 reserved */ +#define ITYPE_offVECTOR 5 /* Vector */ +#define ITYPE_offSWID 16 /* SWID of debugging exception */ +/* bit 31:31 reserved */ + +#define ITYPE_mskETYPE ( 0xF << ITYPE_offETYPE ) +#define ITYPE_mskINST ( 0x1 << ITYPE_offINST ) +#define ITYPE_mskVECTOR ( 0x7F << ITYPE_offVECTOR ) +#define ITYPE_mskSWID ( 0x7FFF << ITYPE_offSWID ) + +/* Additional definitions for ITYPE register */ +#define ITYPE_offSTYPE 16 /* Arithmetic Sub Type */ +#define ITYPE_offCPID 20 /* Co-Processor ID which generate the exception */ + +#define ITYPE_mskSTYPE ( 0xF << ITYPE_offSTYPE ) +#define ITYPE_mskCPID ( 0x3 << ITYPE_offCPID ) + +#define NDS32_VECTOR_mskNONEXCEPTION 0x78 +#define NDS32_VECTOR_offEXCEPTION 8 +#define NDS32_VECTOR_offINTERRUPT 9 + +/* Interrupt vector entry */ +#define ENTRY_RESET_NMI 0 +#define ENTRY_TLB_FILL 1 +#define ENTRY_PTE_NOT_PRESENT 2 +#define ENTRY_TLB_MISC 3 +#define ENTRY_TLB_VLPT_MISS 4 +#define ENTRY_MACHINE_ERROR 5 +#define ENTRY_DEBUG_RELATED 6 +#define ENTRY_GENERAL_EXCPETION 7 +#define ENTRY_SYSCALL 8 + +/* PTE not present exception definition */ +#define ETYPE_NON_LEAF_PTE_NOT_PRESENT 0 +#define ETYPE_LEAF_PTE_NOT_PRESENT 1 + +/* General exception ETYPE definition */ +#define ETYPE_ALIGNMENT_CHECK 0 +#define ETYPE_RESERVED_INSTRUCTION 1 +#define ETYPE_TRAP 2 +#define ETYPE_ARITHMETIC 3 +#define ETYPE_PRECISE_BUS_ERROR 4 +#define ETYPE_IMPRECISE_BUS_ERROR 5 +#define ETYPE_COPROCESSOR 6 +#define ETYPE_RESERVED_VALUE 7 +#define ETYPE_NONEXISTENT_MEM_ADDRESS 8 +#define ETYPE_MPZIU_CONTROL 9 +#define ETYPE_NEXT_PRECISE_STACK_OFL 10 + +/* Kerenl reserves software ID */ +#define SWID_RAISE_INTERRUPT_LEVEL 0x1a /* SWID_RAISE_INTERRUPT_LEVEL is used to + * raise interrupt level for debug exception + */ + +/****************************************************************************** + * ir8: MERR (Machine Error Log Register) + *****************************************************************************/ +/* bit 0:30 reserved */ +#define MERR_offBUSERR 31 /* Bus error caused by a load insn */ + +#define MERR_mskBUSERR ( 0x1 << MERR_offBUSERR ) + +/****************************************************************************** + * ir9: IPC (Interruption Program Counter Register) + * ir10: P_IPC (Previous IPC Register) + * ir11: OIPC (Overflow Interruption Program Counter Register) + *****************************************************************************/ + + /* This is the shadow stack register of the Program Counter */ + +/****************************************************************************** + * ir12: P_P0 (Previous P0 Register) + * ir13: P_P1 (Previous P1 Register) + *****************************************************************************/ + + /* These are shadow registers of $p0 and $p1 */ + +/****************************************************************************** + * ir14: INT_MASK (Interruption Masking Register) + *****************************************************************************/ +#define INT_MASK_offH0IM 0 /* Hardware Interrupt 0 Mask bit */ +#define INT_MASK_offH1IM 1 /* Hardware Interrupt 1 Mask bit */ +#define INT_MASK_offH2IM 2 /* Hardware Interrupt 2 Mask bit */ +#define INT_MASK_offH3IM 3 /* Hardware Interrupt 3 Mask bit */ +#define INT_MASK_offH4IM 4 /* Hardware Interrupt 4 Mask bit */ +#define INT_MASK_offH5IM 5 /* Hardware Interrupt 5 Mask bit */ +/* bit 6:15 reserved */ +#define INT_MASK_offSIM 16 /* Software Interrupt Mask bit */ +/* bit 17:29 reserved */ +#define INT_MASK_offIDIVZE 30 /* Enable detection for Divide-By-Zero */ +#define INT_MASK_offDSSIM 31 /* Default Single Stepping Interruption Mask */ + +#define INT_MASK_mskH0IM ( 0x1 << INT_MASK_offH0IM ) +#define INT_MASK_mskH1IM ( 0x1 << INT_MASK_offH1IM ) +#define INT_MASK_mskH2IM ( 0x1 << INT_MASK_offH2IM ) +#define INT_MASK_mskH3IM ( 0x1 << INT_MASK_offH3IM ) +#define INT_MASK_mskH4IM ( 0x1 << INT_MASK_offH4IM ) +#define INT_MASK_mskH5IM ( 0x1 << INT_MASK_offH5IM ) +#define INT_MASK_mskSIM ( 0x1 << INT_MASK_offSIM ) +#define INT_MASK_mskIDIVZE ( 0x1 << INT_MASK_offIDIVZE ) +#define INT_MASK_mskDSSIM ( 0x1 << INT_MASK_offDSSIM ) + +#define INT_MASK_INITAIAL_VAL (INT_MASK_mskDSSIM|INT_MASK_mskIDIVZE) + +/****************************************************************************** + * ir15: INT_PEND (Interrupt Pending Register) + *****************************************************************************/ +#define INT_PEND_offH0I 0 /* Hardware Interrupt 0 pending bit */ +#define INT_PEND_offH1I 1 /* Hardware Interrupt 1 pending bit */ +#define INT_PEND_offH2I 2 /* Hardware Interrupt 2 pending bit */ +#define INT_PEND_offH3I 3 /* Hardware Interrupt 3 pending bit */ +#define INT_PEND_offH4I 4 /* Hardware Interrupt 4 pending bit */ +#define INT_PEND_offH5I 5 /* Hardware Interrupt 5 pending bit */ + +#define INT_PEND_offCIPL 0 /* Current Interrupt Priority Level */ + +/* bit 6:15 reserved */ +#define INT_PEND_offSWI 16 /* Software Interrupt pending bit */ +/* bit 17:31 reserved */ + +#define INT_PEND_mskH0I ( 0x1 << INT_PEND_offH0I ) +#define INT_PEND_mskH1I ( 0x1 << INT_PEND_offH1I ) +#define INT_PEND_mskH2I ( 0x1 << INT_PEND_offH2I ) +#define INT_PEND_mskH3I ( 0x1 << INT_PEND_offH3I ) +#define INT_PEND_mskH4I ( 0x1 << INT_PEND_offH4I ) +#define INT_PEND_mskH5I ( 0x1 << INT_PEND_offH5I ) +#define INT_PEND_mskCIPL ( 0x1 << INT_PEND_offCIPL ) +#define INT_PEND_mskSWI ( 0x1 << INT_PEND_offSWI ) + +/****************************************************************************** + * mr0: MMU_CTL (MMU Control Register) + *****************************************************************************/ +#define MMU_CTL_offD 0 /* Default minimum page size */ +#define MMU_CTL_offNTC0 1 /* Non-Translated Cachebility of partition 0 */ +#define MMU_CTL_offNTC1 3 /* Non-Translated Cachebility of partition 1 */ +#define MMU_CTL_offNTC2 5 /* Non-Translated Cachebility of partition 2 */ +#define MMU_CTL_offNTC3 7 /* Non-Translated Cachebility of partition 3 */ +#define MMU_CTL_offTBALCK 9 /* TLB all-lock resolution scheme */ +#define MMU_CTL_offMPZIU 10 /* Multiple Page Size In Use bit */ +#define MMU_CTL_offNTM0 11 /* Non-Translated VA to PA of partition 0 */ +#define MMU_CTL_offNTM1 13 /* Non-Translated VA to PA of partition 1 */ +#define MMU_CTL_offNTM2 15 /* Non-Translated VA to PA of partition 2 */ +#define MMU_CTL_offNTM3 17 /* Non-Translated VA to PA of partition 3 */ +#define MMU_CTL_offUNA 23 /* Unaligned access */ +/* bit 24:31 reserved */ + +#define MMU_CTL_mskD ( 0x1 << MMU_CTL_offD ) +#define MMU_CTL_mskNTC0 ( 0x3 << MMU_CTL_offNTC0 ) +#define MMU_CTL_mskNTC1 ( 0x3 << MMU_CTL_offNTC1 ) +#define MMU_CTL_mskNTC2 ( 0x3 << MMU_CTL_offNTC2 ) +#define MMU_CTL_mskNTC3 ( 0x3 << MMU_CTL_offNTC3 ) +#define MMU_CTL_mskTBALCK ( 0x1 << MMU_CTL_offTBALCK ) +#define MMU_CTL_mskMPZIU ( 0x1 << MMU_CTL_offMPZIU ) +#define MMU_CTL_mskNTM0 ( 0x3 << MMU_CTL_offNTM0 ) +#define MMU_CTL_mskNTM1 ( 0x3 << MMU_CTL_offNTM1 ) +#define MMU_CTL_mskNTM2 ( 0x3 << MMU_CTL_offNTM2 ) +#define MMU_CTL_mskNTM3 ( 0x3 << MMU_CTL_offNTM3 ) + +#define MMU_CTL_D4KB 0 +#define MMU_CTL_D8KB 1 +#define MMU_CTL_UNA ( 0x1 << MMU_CTL_offUNA ) + +#define MMU_CTL_CACHEABLE_NON 0 +#define MMU_CTL_CACHEABLE_WB 2 +#define MMU_CTL_CACHEABLE_WT 3 + +/****************************************************************************** + * mr1: L1_PPTB (L1 Physical Page Table Base Register) + *****************************************************************************/ +#define L1_PPTB_offNV 0 /* Enable Hardware Page Table Walker (HPTWK) */ +/* bit 1:11 reserved */ +#define L1_PPTB_offBASE 12 /* First level physical page table base address */ + +#define L1_PPTB_mskNV ( 0x1 << L1_PPTB_offNV ) +#define L1_PPTB_mskBASE ( 0xFFFFF << L1_PPTB_offBASE ) + +/****************************************************************************** + * mr2: TLB_VPN (TLB Access VPN Register) + *****************************************************************************/ +/* bit 0:11 reserved */ +#define TLB_VPN_offVPN 12 /* Virtual Page Number */ + +#define TLB_VPN_mskVPN ( 0xFFFFF << TLB_VPN_offVPN ) + +/****************************************************************************** + * mr3: TLB_DATA (TLB Access Data Register) + *****************************************************************************/ +#define TLB_DATA_offV 0 /* PTE is valid and present */ +#define TLB_DATA_offM 1 /* Page read/write access privilege */ +#define TLB_DATA_offD 4 /* Dirty bit */ +#define TLB_DATA_offX 5 /* Executable bit */ +#define TLB_DATA_offA 6 /* Access bit */ +#define TLB_DATA_offG 7 /* Global page (shared across contexts) */ +#define TLB_DATA_offC 8 /* Cacheability atribute */ +/* bit 11:11 reserved */ +#define TLB_DATA_offPPN 12 /* Phisical Page Number */ + +#define TLB_DATA_mskV ( 0x1 << TLB_DATA_offV ) +#define TLB_DATA_mskM ( 0x7 << TLB_DATA_offM ) +#define TLB_DATA_mskD ( 0x1 << TLB_DATA_offD ) +#define TLB_DATA_mskX ( 0x1 << TLB_DATA_offX ) +#define TLB_DATA_mskA ( 0x1 << TLB_DATA_offA ) +#define TLB_DATA_mskG ( 0x1 << TLB_DATA_offG ) +#define TLB_DATA_mskC ( 0x7 << TLB_DATA_offC ) +#define TLB_DATA_mskPPN ( 0xFFFFF << TLB_DATA_offPPN ) + +#ifdef CONFIG_CPU_DCACHE_WRITETHROUGH +#define TLB_DATA_kernel_text_attr (TLB_DATA_mskV|TLB_DATA_mskM|TLB_DATA_mskD|TLB_DATA_mskX|TLB_DATA_mskG|TLB_DATA_mskC) +#else +#define TLB_DATA_kernel_text_attr (TLB_DATA_mskV|TLB_DATA_mskM|TLB_DATA_mskD|TLB_DATA_mskX|TLB_DATA_mskG|(0x6 << TLB_DATA_offC)) +#endif + +/****************************************************************************** + * mr4: TLB_MISC (TLB Access Misc Register) + *****************************************************************************/ +#define TLB_MISC_offACC_PSZ 0 /* Page size of a PTE entry */ +#define TLB_MISC_offCID 4 /* Context id */ +/* bit 13:31 reserved */ + +#define TLB_MISC_mskACC_PSZ ( 0xF << TLB_MISC_offACC_PSZ ) +#define TLB_MISC_mskCID ( 0x1FF << TLB_MISC_offCID ) + +/****************************************************************************** + * mr5: VLPT_IDX (Virtual Linear Page Table Index Register) + *****************************************************************************/ +#define VLPT_IDX_offZERO 0 /* Always 0 */ +#define VLPT_IDX_offEVPN 2 /* Exception Virtual Page Number */ +#define VLPT_IDX_offVLPTB 22 /* Base VA of VLPT */ + +#define VLPT_IDX_mskZERO ( 0x3 << VLPT_IDX_offZERO ) +#define VLPT_IDX_mskEVPN ( 0xFFFFF << VLPT_IDX_offEVPN ) +#define VLPT_IDX_mskVLPTB ( 0x3FF << VLPT_IDX_offVLPTB ) + +/****************************************************************************** + * mr6: ILMB (Instruction Local Memory Base Register) + *****************************************************************************/ +#define ILMB_offIEN 0 /* Enable ILM */ +#define ILMB_offILMSZ 1 /* Size of ILM */ +/* bit 5:19 reserved */ +#define ILMB_offIBPA 20 /* Base PA of ILM */ + +#define ILMB_mskIEN ( 0x1 << ILMB_offIEN ) +#define ILMB_mskILMSZ ( 0xF << ILMB_offILMSZ ) +#define ILMB_mskIBPA ( 0xFFF << ILMB_offIBPA ) + +/****************************************************************************** + * mr7: DLMB (Data Local Memory Base Register) + *****************************************************************************/ +#define DLMB_offDEN 0 /* Enable DLM */ +#define DLMB_offDLMSZ 1 /* Size of DLM */ +#define DLMB_offDBM 5 /* Enable Double-Buffer Mode for DLM */ +#define DLMB_offDBB 6 /* Double-buffer bank which can be accessed by the processor */ +/* bit 7:19 reserved */ +#define DLMB_offDBPA 20 /* Base PA of DLM */ + +#define DLMB_mskDEN ( 0x1 << DLMB_offDEN ) +#define DLMB_mskDLMSZ ( 0xF << DLMB_offDLMSZ ) +#define DLMB_mskDBM ( 0x1 << DLMB_offDBM ) +#define DLMB_mskDBB ( 0x1 << DLMB_offDBB ) +#define DLMB_mskDBPA ( 0xFFF << DLMB_offDBPA ) + +/****************************************************************************** + * mr8: CACHE_CTL (Cache Control Register) + *****************************************************************************/ +#define CACHE_CTL_offIC_EN 0 /* Enable I-cache */ +#define CACHE_CTL_offDC_EN 1 /* Enable D-cache */ +#define CACHE_CTL_offICALCK 2 /* I-cache all-lock resolution scheme */ +#define CACHE_CTL_offDCALCK 3 /* D-cache all-lock resolution scheme */ +#define CACHE_CTL_offDCCWF 4 /* Enable D-cache Critical Word Forwarding */ +#define CACHE_CTL_offDCPMW 5 /* Enable D-cache concurrent miss and write-back processing */ +/* bit 6:31 reserved */ + +#define CACHE_CTL_mskIC_EN ( 0x1 << CACHE_CTL_offIC_EN ) +#define CACHE_CTL_mskDC_EN ( 0x1 << CACHE_CTL_offDC_EN ) +#define CACHE_CTL_mskICALCK ( 0x1 << CACHE_CTL_offICALCK ) +#define CACHE_CTL_mskDCALCK ( 0x1 << CACHE_CTL_offDCALCK ) +#define CACHE_CTL_mskDCCWF ( 0x1 << CACHE_CTL_offDCCWF ) +#define CACHE_CTL_mskDCPMW ( 0x1 << CACHE_CTL_offDCPMW ) + +/****************************************************************************** + * mr9: HSMP_SADDR (High Speed Memory Port Starting Address) + *****************************************************************************/ +#define HSMP_SADDR_offEN 0 /* Enable control bit for the High Speed Memory port */ +/* bit 1:19 reserved */ + +#define HSMP_SADDR_offRANGE 1 /* Denote the address range (only defined in HSMP v2 ) */ +#define HSMP_SADDR_offSADDR 20 /* Starting base PA of the High Speed Memory Port region */ + +#define HSMP_SADDR_mskEN ( 0x1 << HSMP_SADDR_offEN ) +#define HSMP_SADDR_mskRANGE ( 0xFFF << HSMP_SADDR_offRANGE ) +#define HSMP_SADDR_mskSADDR ( 0xFFF << HSMP_SADDR_offSADDR ) + +/****************************************************************************** + * mr10: HSMP_EADDR (High Speed Memory Port Ending Address) + *****************************************************************************/ +/* bit 0:19 reserved */ +#define HSMP_EADDR_offEADDR 20 + +#define HSMP_EADDR_mskEADDR ( 0xFFF << HSMP_EADDR_offEADDR ) + +/****************************************************************************** + * dr0+(n*5): BPCn (n=0-7) (Breakpoint Control Register) + *****************************************************************************/ +#define BPC_offWP 0 /* Configuration of BPAn */ +#define BPC_offEL 1 /* Enable BPAn */ +#define BPC_offS 2 /* Data address comparison for a store instruction */ +#define BPC_offP 3 /* Compared data address is PA */ +#define BPC_offC 4 /* CID value is compared with the BPCIDn register */ +#define BPC_offBE0 5 /* Enable byte mask for the comparison with register */ +#define BPC_offBE1 6 /* Enable byte mask for the comparison with register */ +#define BPC_offBE2 7 /* Enable byte mask for the comparison with register */ +#define BPC_offBE3 8 /* Enable byte mask for the comparison with register */ +#define BPC_offT 9 /* Enable breakpoint Embedded Tracer triggering operation */ + +#define BPC_mskWP ( 0x1 << BPC_offWP ) +#define BPC_mskEL ( 0x1 << BPC_offEL ) +#define BPC_mskS ( 0x1 << BPC_offS ) +#define BPC_mskP ( 0x1 << BPC_offP ) +#define BPC_mskC ( 0x1 << BPC_offC ) +#define BPC_mskBE0 ( 0x1 << BPC_offBE0 ) +#define BPC_mskBE1 ( 0x1 << BPC_offBE1 ) +#define BPC_mskBE2 ( 0x1 << BPC_offBE2 ) +#define BPC_mskBE3 ( 0x1 << BPC_offBE3 ) +#define BPC_mskT ( 0x1 << BPC_offT ) + +/****************************************************************************** + * dr1+(n*5): BPAn (n=0-7) (Breakpoint Address Register) + *****************************************************************************/ + + /* These registers contain break point address */ + +/****************************************************************************** + * dr2+(n*5): BPAMn (n=0-7) (Breakpoint Address Mask Register) + *****************************************************************************/ + + /* These registerd contain the address comparison mask for the BPAn register */ + +/****************************************************************************** + * dr3+(n*5): BPVn (n=0-7) Breakpoint Data Value Register + *****************************************************************************/ + + /* The BPVn register contains the data value that will be compared with the + * incoming load/store data value */ + +/****************************************************************************** + * dr4+(n*5): BPCIDn (n=0-7) (Breakpoint Context ID Register) + *****************************************************************************/ +#define BPCID_offCID 0 /* CID that will be compared with a process's CID */ +/* bit 9:31 reserved */ + +#define BPCID_mskCID ( 0x1FF << BPCID_offCID ) + +/****************************************************************************** + * dr40: EDM_CFG (EDM Configuration Register) + *****************************************************************************/ +#define EDM_CFG_offBC 0 /* Number of hardware breakpoint sets implemented */ +#define EDM_CFG_offDIMU 3 /* Debug Instruction Memory Unit exists */ +/* bit 4:15 reserved */ +#define EDM_CFG_offVER 16 /* EDM version */ + +#define EDM_CFG_mskBC ( 0x7 << EDM_CFG_offBC ) +#define EDM_CFG_mskDIMU ( 0x1 << EDM_CFG_offDIMU ) +#define EDM_CFG_mskVER ( 0xFFFF << EDM_CFG_offVER ) + +/****************************************************************************** + * dr41: EDMSW (EDM Status Word) + *****************************************************************************/ +#define EDMSW_offWV 0 /* Write Valid */ +#define EDMSW_offRV 1 /* Read Valid */ +#define EDMSW_offDE 2 /* Debug exception has occurred for this core */ +/* bit 3:31 reserved */ + +#define EDMSW_mskWV ( 0x1 << EDMSW_offWV ) +#define EDMSW_mskRV ( 0x1 << EDMSW_offRV ) +#define EDMSW_mskDE ( 0x1 << EDMSW_offDE ) + +/****************************************************************************** + * dr42: EDM_CTL (EDM Control Register) + *****************************************************************************/ +/* bit 0:30 reserved */ +#define EDM_CTL_offV3_EDM_MODE 6 /* EDM compatibility control bit */ +#define EDM_CTL_offDEH_SEL 31 /* Controls where debug exception is directed to */ + +#define EDM_CTL_mskV3_EDM_MODE ( 0x1 << EDM_CTL_offV3_EDM_MODE ) +#define EDM_CTL_mskDEH_SEL ( 0x1 << EDM_CTL_offDEH_SEL ) + +/****************************************************************************** + * dr43: EDM_DTR (EDM Data Transfer Register) + *****************************************************************************/ + + /* This is used to exchange data between the embedded EDM logic + * and the processor core */ + +/****************************************************************************** + * dr44: BPMTC (Breakpoint Match Trigger Counter Register) + *****************************************************************************/ +#define BPMTC_offBPMTC 0 /* Breakpoint match trigger counter value */ +/* bit 16:31 reserved */ + +#define BPMTC_mskBPMTC ( 0xFFFF << BPMTC_offBPMTC ) + +/****************************************************************************** + * dr45: DIMBR (Debug Instruction Memory Base Register) + *****************************************************************************/ +/* bit 0:11 reserved */ +#define DIMBR_offDIMB 12 /* Base address of the Debug Instruction Memory (DIM) */ +#define DIMBR_mskDIMB ( 0xFFFFF << DIMBR_offDIMB ) + +/****************************************************************************** + * dr46: TECR0(Trigger Event Control register 0) + * dr47: TECR1 (Trigger Event Control register 1) + *****************************************************************************/ +#define TECR_offBP 0 /* Controld which BP is used as a trigger source */ +#define TECR_offNMI 8 /* Use NMI as a trigger source */ +#define TECR_offHWINT 9 /* Corresponding interrupt is used as a trigger source */ +#define TECR_offEVIC 15 /* Enable HWINT as a trigger source in EVIC mode */ +#define TECR_offSYS 16 /* Enable SYSCALL instruction as a trigger source */ +#define TECR_offDBG 17 /* Enable debug exception as a trigger source */ +#define TECR_offMRE 18 /* Enable MMU related exception as a trigger source */ +#define TECR_offE 19 /* An exception is used as a trigger source */ +/* bit 20:30 reserved */ +#define TECR_offL 31 /* Link/Cascade TECR0 trigger event to TECR1 trigger event */ + +#define TECR_mskBP ( 0xFF << TECR_offBP ) +#define TECR_mskNMI ( 0x1 << TECR_offBNMI ) +#define TECR_mskHWINT ( 0x3F << TECR_offBHWINT ) +#define TECR_mskEVIC ( 0x1 << TECR_offBEVIC ) +#define TECR_mskSYS ( 0x1 << TECR_offBSYS ) +#define TECR_mskDBG ( 0x1 << TECR_offBDBG ) +#define TECR_mskMRE ( 0x1 << TECR_offBMRE ) +#define TECR_mskE ( 0x1 << TECR_offE ) +#define TECR_mskL ( 0x1 << TECR_offL ) + +/****************************************************************************** + * pfr0-2: PFMC0-2 (Performance Counter Register 0-2) + *****************************************************************************/ + + /* These registers contains performance event count */ + +/****************************************************************************** + * pfr3: PFM_CTL (Performance Counter Control Register) + *****************************************************************************/ +#define PFM_CTL_offEN0 0 /* Enable PFMC0 */ +#define PFM_CTL_offEN1 1 /* Enable PFMC1 */ +#define PFM_CTL_offEN2 2 /* Enable PFMC2 */ +#define PFM_CTL_offIE0 3 /* Enable interrupt for PFMC0 */ +#define PFM_CTL_offIE1 4 /* Enable interrupt for PFMC1 */ +#define PFM_CTL_offIE2 5 /* Enable interrupt for PFMC2 */ +#define PFM_CTL_offOVF0 6 /* Overflow bit of PFMC0 */ +#define PFM_CTL_offOVF1 7 /* Overflow bit of PFMC1 */ +#define PFM_CTL_offOVF2 8 /* Overflow bit of PFMC2 */ +#define PFM_CTL_offKS0 9 /* Enable superuser mode event counting for PFMC0 */ +#define PFM_CTL_offKS1 10 /* Enable superuser mode event counting for PFMC1 */ +#define PFM_CTL_offKS2 11 /* Enable superuser mode event counting for PFMC2 */ +#define PFM_CTL_offKU0 12 /* Enable user mode event counting for PFMC0 */ +#define PFM_CTL_offKU1 13 /* Enable user mode event counting for PFMC1 */ +#define PFM_CTL_offKU2 14 /* Enable user mode event counting for PFMC2 */ +#define PFM_CTL_offSEL0 15 /* The event selection for PFMC0 */ +#define PFM_CTL_offSEL1 16 /* The event selection for PFMC1 */ +#define PFM_CTL_offSEL2 22 /* The event selection for PFMC2 */ +/* bit 28:31 reserved */ + +#define PFM_CTL_mskEN0 ( 0x01 << PFM_CTL_offEN0 ) +#define PFM_CTL_mskEN1 ( 0x01 << PFM_CTL_offEN1 ) +#define PFM_CTL_mskEN2 ( 0x01 << PFM_CTL_offEN2 ) +#define PFM_CTL_mskIE0 ( 0x01 << PFM_CTL_offIE0 ) +#define PFM_CTL_mskIE1 ( 0x01 << PFM_CTL_offIE1 ) +#define PFM_CTL_mskIE2 ( 0x01 << PFM_CTL_offIE2 ) +#define PFM_CTL_mskOVF0 ( 0x01 << PFM_CTL_offOVF0 ) +#define PFM_CTL_mskOVF1 ( 0x01 << PFM_CTL_offOVF1 ) +#define PFM_CTL_mskOVF2 ( 0x01 << PFM_CTL_offOVF2 ) +#define PFM_CTL_mskKS0 ( 0x01 << PFM_CTL_offKS0 ) +#define PFM_CTL_mskKS1 ( 0x01 << PFM_CTL_offKS1 ) +#define PFM_CTL_mskKS2 ( 0x01 << PFM_CTL_offKS2 ) +#define PFM_CTL_mskKU0 ( 0x01 << PFM_CTL_offKU0 ) +#define PFM_CTL_mskKU1 ( 0x01 << PFM_CTL_offKU1 ) +#define PFM_CTL_mskKU2 ( 0x01 << PFM_CTL_offKU2 ) +#define PFM_CTL_mskSEL0 ( 0x01 << PFM_CTL_offSEL0 ) +#define PFM_CTL_mskSEL1 ( 0x3F << PFM_CTL_offSEL1 ) +#define PFM_CTL_mskSEL2 ( 0x3F << PFM_CTL_offSEL2 ) + +/****************************************************************************** + * SDZ_CTL (Structure Downsizing Control Register) + *****************************************************************************/ +#define SDZ_CTL_offICDZ 0 /* I-cache downsizing control */ +#define SDZ_CTL_offDCDZ 3 /* D-cache downsizing control */ +#define SDZ_CTL_offMTBDZ 6 /* MTLB downsizing control */ +#define SDZ_CTL_offBTBDZ 9 /* Branch Target Table downsizing control */ +/* bit 12:31 reserved */ +#define SDZ_CTL_mskICDZ ( 0x07 << SDZ_CTL_offICDZ ) +#define SDZ_CTL_mskDCDZ ( 0x07 << SDZ_CTL_offDCDZ ) +#define SDZ_CTL_mskMTBDZ ( 0x07 << SDZ_CTL_offMTBDZ ) +#define SDZ_CTL_mskBTBDZ ( 0x07 << SDZ_CTL_offBTBDZ ) + +/****************************************************************************** + * N13MISC_CTL (N13 Miscellaneous Control Register) + *****************************************************************************/ +#define N13MISC_CTL_offBTB 0 /* Disable Branch Target Buffer */ +#define N13MISC_CTL_offRTP 1 /* Disable Return Target Predictor */ +#define N13MISC_CTL_offPTEPF 2 /* Disable HPTWK L2 PTE pefetch */ +#define N13MISC_CTL_offSP_SHADOW_EN 4 /* Enable shadow stack pointers */ +/* bit 6, 9:31 reserved */ + +#define N13MISC_CTL_makBTB ( 0x1 << N13MISC_CTL_offBTB ) +#define N13MISC_CTL_makRTP ( 0x1 << N13MISC_CTL_offRTP ) +#define N13MISC_CTL_makPTEPF ( 0x1 << N13MISC_CTL_offPTEPF ) +#define N13MISC_CTL_makSP_SHADOW_EN ( 0x1 << N13MISC_CTL_offSP_SHADOW_EN ) + +#define MISC_init (N13MISC_CTL_makBTB|N13MISC_CTL_makRTP|N13MISC_CTL_makSP_SHADOW_EN) + +/****************************************************************************** + * PRUSR_ACC_CTL (Privileged Resource User Access Control Registers) + *****************************************************************************/ +#define PRUSR_ACC_CTL_offDMA_EN 0 /* Allow user mode access of DMA registers */ +#define PRUSR_ACC_CTL_offPFM_EN 1 /* Allow user mode access of PFM registers */ + +#define PRUSR_ACC_CTL_mskDMA_EN ( 0x1 << PRUSR_ACC_CTL_offDMA_EN ) +#define PRUSR_ACC_CTL_mskPFM_EN ( 0x1 << PRUSR_ACC_CTL_offPFM_EN ) + +/****************************************************************************** + * dmar0: DMA_CFG (DMA Configuration Register) + *****************************************************************************/ +#define DMA_CFG_offNCHN 0 /* The number of DMA channels implemented */ +#define DMA_CFG_offUNEA 2 /* Un-aligned External Address transfer feature */ +#define DMA_CFG_off2DET 3 /* 2-D Element Transfer feature */ +/* bit 4:15 reserved */ +#define DMA_CFG_offVER 16 /* DMA architecture and implementation version */ + +#define DMA_CFG_mskNCHN ( 0x3 << DMA_CFG_offNCHN ) +#define DMA_CFG_mskUNEA ( 0x1 << DMA_CFG_offUNEA ) +#define DMA_CFG_msk2DET ( 0x1 << DMA_CFG_off2DET ) +#define DMA_CFG_mskVER ( 0xFFFF << DMA_CFG_offVER ) + +/****************************************************************************** + * dmar1: DMA_GCSW (DMA Global Control and Status Word Register) + *****************************************************************************/ +#define DMA_GCSW_offC0STAT 0 /* DMA channel 0 state */ +#define DMA_GCSW_offC1STAT 3 /* DMA channel 1 state */ +/* bit 6:11 reserved */ +#define DMA_GCSW_offC0INT 12 /* DMA channel 0 generate interrupt */ +#define DMA_GCSW_offC1INT 13 /* DMA channel 1 generate interrupt */ +/* bit 14:30 reserved */ +#define DMA_GCSW_offEN 31 /* Enable DMA engine */ + +#define DMA_GCSW_mskC0STAT ( 0x7 << DMA_GCSW_offC0STAT ) +#define DMA_GCSW_mskC1STAT ( 0x7 << DMA_GCSW_offC1STAT ) +#define DMA_GCSW_mskC0INT ( 0x1 << DMA_GCSW_offC0INT ) +#define DMA_GCSW_mskC1INT ( 0x1 << DMA_GCSW_offC1INT ) +#define DMA_GCSW_mskEN ( 0x1 << DMA_GCSW_offEN ) + +/****************************************************************************** + * dmar2: DMA_CHNSEL (DMA Channel Selection Register) + *****************************************************************************/ +#define DMA_CHNSEL_offCHAN 0 /* Selected channel number */ +/* bit 2:31 reserved */ + +#define DMA_CHNSEL_mskCHAN ( 0x3 << DMA_CHNSEL_offCHAN ) + +/****************************************************************************** + * dmar3: DMA_ACT (DMA Action Register) + *****************************************************************************/ +#define DMA_ACT_offACMD 0 /* DMA Action Command */ +/* bit 2:31 reserved */ +#define DMA_ACT_mskACMD ( 0x3 << DMA_ACT_offACMD ) + +/****************************************************************************** + * dmar4: DMA_SETUP (DMA Setup Register) + *****************************************************************************/ +#define DMA_SETUP_offLM 0 /* Local Memory Selection */ +#define DMA_SETUP_offTDIR 1 /* Transfer Direction */ +#define DMA_SETUP_offTES 2 /* Transfer Element Size */ +#define DMA_SETUP_offESTR 4 /* External memory transfer Stride */ +#define DMA_SETUP_offCIE 16 /* Interrupt Enable on Completion */ +#define DMA_SETUP_offSIE 17 /* Interrupt Enable on explicit Stop */ +#define DMA_SETUP_offEIE 18 /* Interrupt Enable on Error */ +#define DMA_SETUP_offUE 19 /* Enable the Un-aligned External Address */ +#define DMA_SETUP_off2DE 20 /* Enable the 2-D External Transfer */ +#define DMA_SETUP_offCOA 21 /* Transfer Coalescable */ +/* bit 22:31 reserved */ + +#define DMA_SETUP_mskLM ( 0x1 << DMA_SETUP_offLM ) +#define DMA_SETUP_mskTDIR ( 0x1 << DMA_SETUP_offTDIR ) +#define DMA_SETUP_mskTES ( 0x3 << DMA_SETUP_offTES ) +#define DMA_SETUP_mskESTR ( 0xFFF << DMA_SETUP_offESTR ) +#define DMA_SETUP_mskCIE ( 0x1 << DMA_SETUP_offCIE ) +#define DMA_SETUP_mskSIE ( 0x1 << DMA_SETUP_offSIE ) +#define DMA_SETUP_mskEIE ( 0x1 << DMA_SETUP_offEIE ) +#define DMA_SETUP_mskUE ( 0x1 << DMA_SETUP_offUE ) +#define DMA_SETUP_msk2DE ( 0x1 << DMA_SETUP_off2DE ) +#define DMA_SETUP_mskCOA ( 0x1 << DMA_SETUP_offCOA ) + +/****************************************************************************** + * dmar5: DMA_ISADDR (DMA Internal Start Address Register) + *****************************************************************************/ +#define DMA_ISADDR_offISADDR 0 /* Internal Start Address */ +/* bit 20:31 reserved */ +#define DMA_ISADDR_mskISADDR ( 0xFFFFF << DMA_ISADDR_offISADDR ) + +/****************************************************************************** + * dmar6: DMA_ESADDR (DMA External Start Address Register) + *****************************************************************************/ +/* This register holds External Start Address */ + +/****************************************************************************** + * dmar7: DMA_TCNT (DMA Transfer Element Count Register) + *****************************************************************************/ +#define DMA_TCNT_offTCNT 0 /* DMA transfer element count */ +/* bit 18:31 reserved */ +#define DMA_TCNT_mskTCNT ( 0x3FFFF << DMA_TCNT_offTCNT ) + +/****************************************************************************** + * dmar8: DMA_STATUS (DMA Status Register) + *****************************************************************************/ +#define DMA_STATUS_offSTAT 0 /* DMA channel state */ +#define DMA_STATUS_offSTUNA 3 /* Un-aligned error on External Stride value */ +#define DMA_STATUS_offDERR 4 /* DMA Transfer Disruption Error */ +#define DMA_STATUS_offEUNA 5 /* Un-aligned error on the External address */ +#define DMA_STATUS_offIUNA 6 /* Un-aligned error on the Internal address */ +#define DMA_STATUS_offIOOR 7 /* Out-Of-Range error on the Internal address */ +#define DMA_STATUS_offEBUS 8 /* Bus Error on an External DMA transfer */ +#define DMA_STATUS_offESUP 9 /* DMA setup error */ +/* bit 10:31 reserved */ + +#define DMA_STATUS_mskSTAT ( 0x7 << DMA_STATUS_offSTAT ) +#define DMA_STATUS_mskSTUNA ( 0x1 << DMDMA_STATUS_offSTUNA ) +#define DMA_STATUS_mskDERR ( 0x1 << DMDMA_STATUS_offDERR ) +#define DMA_STATUS_mskEUNA ( 0x1 << DMDMA_STATUS_offEUNA ) +#define DMA_STATUS_mskIUNA ( 0x1 << DMDMA_STATUS_offIUNA ) +#define DMA_STATUS_mskIOOR ( 0x1 << DMDMA_STATUS_offIOOR ) +#define DMA_STATUS_mskEBUS ( 0x1 << DMDMA_STATUS_offEBUS ) +#define DMA_STATUS_mskESUP ( 0x1 << DMDMA_STATUS_offESUP ) + +/****************************************************************************** + * dmar9: DMA_2DSET (DMA 2D Setup Register) + *****************************************************************************/ +#define DMA_2DSET_offWECNT 0 /* The Width Element Count for a 2-D region */ +#define DMA_2DSET_offHTSTR 16 /* The Height Stride for a 2-D region */ + +#define DMA_2DSET_mskHTSTR ( 0xFFFF << DMA_2DSET_offHTSTR ) +#define DMA_2DSET_mskWECNT ( 0xFFFF << DMA_2DSET_offWECNT ) + +/****************************************************************************** + * dmar10: DMA_2DSCTL (DMA 2D Startup Control Register) + *****************************************************************************/ +#define DMA_2DSCTL_offSTWECNT 0 /* Startup Width Element Count for a 2-D region */ +/* bit 16:31 reserved */ + +#define DMA_2DSCTL_mskSTWECNT ( 0xFFFF << DMA_2DSCTL_offSTWECNT ) + +/****************************************************************************** + * fpcsr: FPCSR (Floating-Point Control Status Register) + *****************************************************************************/ +#define FPCSR_offRM 0 +#define FPCSR_offIVO 2 +#define FPCSR_offDBZ 3 +#define FPCSR_offOVF 4 +#define FPCSR_offUDF 5 +#define FPCSR_offIEX 6 +#define FPCSR_offIVOE 7 +#define FPCSR_offDBZE 8 +#define FPCSR_offOVFE 9 +#define FPCSR_offUDFE 10 +#define FPCSR_offIEXE 11 +#define FPCSR_offDNZ 12 +#define FPCSR_offIVOT 13 +#define FPCSR_offDBZT 14 +#define FPCSR_offOVFT 15 +#define FPCSR_offUDFT 16 +#define FPCSR_offIEXT 17 +#define FPCSR_offDNIT 18 +#define FPCSR_offRIT 19 + +#define FPCSR_mskRM ( 0x3 << FPCSR_offRM ) +#define FPCSR_mskIVO ( 0x1 << FPCSR_offIVO ) +#define FPCSR_mskDBZ ( 0x1 << FPCSR_offDBZ ) +#define FPCSR_mskOVF ( 0x1 << FPCSR_offOVF ) +#define FPCSR_mskUDF ( 0x1 << FPCSR_offUDF ) +#define FPCSR_mskIEX ( 0x1 << FPCSR_offIEX ) +#define FPCSR_mskIVOE ( 0x1 << FPCSR_offIVOE ) +#define FPCSR_mskDBZE ( 0x1 << FPCSR_offDBZE ) +#define FPCSR_mskOVFE ( 0x1 << FPCSR_offOVFE ) +#define FPCSR_mskUDFE ( 0x1 << FPCSR_offUDFE ) +#define FPCSR_mskIEXE ( 0x1 << FPCSR_offIEXE ) +#define FPCSR_mskDNZ ( 0x1 << FPCSR_offDNZ ) +#define FPCSR_mskIVOT ( 0x1 << FPCSR_offIVOT ) +#define FPCSR_mskDBZT ( 0x1 << FPCSR_offDBZT ) +#define FPCSR_mskOVFT ( 0x1 << FPCSR_offOVFT ) +#define FPCSR_mskUDFT ( 0x1 << FPCSR_offUDFT ) +#define FPCSR_mskIEXT ( 0x1 << FPCSR_offIEXT ) +#define FPCSR_mskDNIT ( 0x1 << FPCSR_offDNIT ) +#define FPCSR_mskRIT ( 0x1 << FPCSR_offRIT ) +#define FPCSR_mskALL (FPCSR_mskIVO | FPCSR_mskDBZ | FPCSR_mskOVF | FPCSR_mskUDF | FPCSR_mskIEX) +#define FPCSR_mskALLE (FPCSR_mskIVOE | FPCSR_mskDBZE | FPCSR_mskOVFE | FPCSR_mskUDFE | FPCSR_mskIEXE) +#define FPCSR_mskALLT (FPCSR_mskIVOT | FPCSR_mskDBZT | FPCSR_mskOVFT | FPCSR_mskUDFT | FPCSR_mskIEXT |FPCSR_mskDNIT | FPCSR_mskRIT) + +/****************************************************************************** + * fpcfg: FPCFG (Floating-Point Configuration Register) + *****************************************************************************/ +#define FPCFG_offSP 0 +#define FPCFG_offDP 1 +#define FPCFG_offFREG 2 +#define FPCFG_offFMA 4 +#define FPCFG_offIMVER 22 +#define FPCFG_offAVER 27 + +#define FPCFG_mskSP ( 0x1 << FPCFG_offSP ) +#define FPCFG_mskDP ( 0x1 << FPCFG_offDP ) +#define FPCFG_mskFREG ( 0x3 << FPCFG_offFREG ) +#define FPCFG_mskFMA ( 0x1 << FPCFG_offFMA ) +#define FPCFG_mskIMVER ( 0x1F << FPCFG_offIMVER ) +#define FPCFG_mskAVER ( 0x1F << FPCFG_offAVER ) + +/****************************************************************************** + * fucpr: FUCOP_CTL (FPU and Coprocessor Enable Control Register) + *****************************************************************************/ +#define FUCOP_CTL_offCP0EN 0 +#define FUCOP_CTL_offCP1EN 1 +#define FUCOP_CTL_offCP2EN 2 +#define FUCOP_CTL_offCP3EN 3 +#define FUCOP_CTL_offAUEN 31 + +#define FUCOP_CTL_mskCP0EN ( 0x1 << FUCOP_CTL_offCP0EN ) +#define FUCOP_CTL_mskCP1EN ( 0x1 << FUCOP_CTL_offCP1EN ) +#define FUCOP_CTL_mskCP2EN ( 0x1 << FUCOP_CTL_offCP2EN ) +#define FUCOP_CTL_mskCP3EN ( 0x1 << FUCOP_CTL_offCP3EN ) +#define FUCOP_CTL_mskAUEN ( 0x1 << FUCOP_CTL_offAUEN ) + +#endif /* __NDS32_BITFIELD_H__ */ diff --git a/arch/nds32/include/asm/cache.h b/arch/nds32/include/asm/cache.h new file mode 100644 index 000000000..347db4881 --- /dev/null +++ b/arch/nds32/include/asm/cache.h @@ -0,0 +1,12 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#ifndef __NDS32_CACHE_H__ +#define __NDS32_CACHE_H__ + +#define L1_CACHE_BYTES 32 +#define L1_CACHE_SHIFT 5 + +#define ARCH_DMA_MINALIGN L1_CACHE_BYTES + +#endif /* __NDS32_CACHE_H__ */ diff --git a/arch/nds32/include/asm/cache_info.h b/arch/nds32/include/asm/cache_info.h new file mode 100644 index 000000000..38ec458ba --- /dev/null +++ b/arch/nds32/include/asm/cache_info.h @@ -0,0 +1,13 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +struct cache_info { + unsigned char ways; + unsigned char line_size; + unsigned short sets; + unsigned short size; +#if defined(CONFIG_CPU_CACHE_ALIASING) + unsigned short aliasing_num; + unsigned int aliasing_mask; +#endif +}; diff --git a/arch/nds32/include/asm/cacheflush.h b/arch/nds32/include/asm/cacheflush.h new file mode 100644 index 000000000..8b26198d5 --- /dev/null +++ b/arch/nds32/include/asm/cacheflush.h @@ -0,0 +1,51 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#ifndef __NDS32_CACHEFLUSH_H__ +#define __NDS32_CACHEFLUSH_H__ + +#include <linux/mm.h> + +#define PG_dcache_dirty PG_arch_1 + +void flush_icache_range(unsigned long start, unsigned long end); +void flush_icache_page(struct vm_area_struct *vma, struct page *page); +#ifdef CONFIG_CPU_CACHE_ALIASING +void flush_cache_mm(struct mm_struct *mm); +void flush_cache_dup_mm(struct mm_struct *mm); +void flush_cache_range(struct vm_area_struct *vma, + unsigned long start, unsigned long end); +void flush_cache_page(struct vm_area_struct *vma, + unsigned long addr, unsigned long pfn); +void flush_cache_kmaps(void); +void flush_cache_vmap(unsigned long start, unsigned long end); +void flush_cache_vunmap(unsigned long start, unsigned long end); + +#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 1 +void flush_dcache_page(struct page *page); +void copy_to_user_page(struct vm_area_struct *vma, struct page *page, + unsigned long vaddr, void *dst, void *src, int len); +void copy_from_user_page(struct vm_area_struct *vma, struct page *page, + unsigned long vaddr, void *dst, void *src, int len); + +#define ARCH_HAS_FLUSH_ANON_PAGE +void flush_anon_page(struct vm_area_struct *vma, + struct page *page, unsigned long vaddr); + +#define ARCH_HAS_FLUSH_KERNEL_DCACHE_PAGE +void flush_kernel_dcache_page(struct page *page); +void flush_kernel_vmap_range(void *addr, int size); +void invalidate_kernel_vmap_range(void *addr, int size); +#define flush_dcache_mmap_lock(mapping) xa_lock_irq(&(mapping)->i_pages) +#define flush_dcache_mmap_unlock(mapping) xa_unlock_irq(&(mapping)->i_pages) + +#else +#include <asm-generic/cacheflush.h> +#undef flush_icache_range +#undef flush_icache_page +#undef flush_icache_user_range +void flush_icache_user_range(struct vm_area_struct *vma, struct page *page, + unsigned long addr, int len); +#endif + +#endif /* __NDS32_CACHEFLUSH_H__ */ diff --git a/arch/nds32/include/asm/current.h b/arch/nds32/include/asm/current.h new file mode 100644 index 000000000..b4dcd22b7 --- /dev/null +++ b/arch/nds32/include/asm/current.h @@ -0,0 +1,12 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#ifndef _ASM_NDS32_CURRENT_H +#define _ASM_NDS32_CURRENT_H + +#ifndef __ASSEMBLY__ +register struct task_struct *current asm("$r25"); +#endif /* __ASSEMBLY__ */ +#define tsk $r25 + +#endif /* _ASM_NDS32_CURRENT_H */ diff --git a/arch/nds32/include/asm/delay.h b/arch/nds32/include/asm/delay.h new file mode 100644 index 000000000..519ba97ac --- /dev/null +++ b/arch/nds32/include/asm/delay.h @@ -0,0 +1,39 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#ifndef __NDS32_DELAY_H__ +#define __NDS32_DELAY_H__ + +#include <asm/param.h> + +/* There is no clocksource cycle counter in the CPU. */ +static inline void __delay(unsigned long loops) +{ + __asm__ __volatile__(".align 2\n" + "1:\n" + "\taddi\t%0, %0, -1\n" + "\tbgtz\t%0, 1b\n" + :"=r"(loops) + :"0"(loops)); +} + +static inline void __udelay(unsigned long usecs, unsigned long lpj) +{ + usecs *= (unsigned long)(((0x8000000000000000ULL / (500000 / HZ)) + + 0x80000000ULL) >> 32); + usecs = (unsigned long)(((unsigned long long)usecs * lpj) >> 32); + __delay(usecs); +} + +#define udelay(usecs) __udelay((usecs), loops_per_jiffy) + +/* make sure "usecs *= ..." in udelay do not overflow. */ +#if HZ >= 1000 +#define MAX_UDELAY_MS 1 +#elif HZ <= 200 +#define MAX_UDELAY_MS 5 +#else +#define MAX_UDELAY_MS (1000 / HZ) +#endif + +#endif diff --git a/arch/nds32/include/asm/elf.h b/arch/nds32/include/asm/elf.h new file mode 100644 index 000000000..f5f9cf7e0 --- /dev/null +++ b/arch/nds32/include/asm/elf.h @@ -0,0 +1,171 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#ifndef __ASMNDS32_ELF_H +#define __ASMNDS32_ELF_H + +/* + * ELF register definitions.. + */ + +#include <asm/ptrace.h> + +typedef unsigned long elf_greg_t; +typedef unsigned long elf_freg_t[3]; + +extern unsigned int elf_hwcap; + +#define EM_NDS32 167 + +#define R_NDS32_NONE 0 +#define R_NDS32_16_RELA 19 +#define R_NDS32_32_RELA 20 +#define R_NDS32_9_PCREL_RELA 22 +#define R_NDS32_15_PCREL_RELA 23 +#define R_NDS32_17_PCREL_RELA 24 +#define R_NDS32_25_PCREL_RELA 25 +#define R_NDS32_HI20_RELA 26 +#define R_NDS32_LO12S3_RELA 27 +#define R_NDS32_LO12S2_RELA 28 +#define R_NDS32_LO12S1_RELA 29 +#define R_NDS32_LO12S0_RELA 30 +#define R_NDS32_SDA15S3_RELA 31 +#define R_NDS32_SDA15S2_RELA 32 +#define R_NDS32_SDA15S1_RELA 33 +#define R_NDS32_SDA15S0_RELA 34 +#define R_NDS32_GOT20 37 +#define R_NDS32_25_PLTREL 38 +#define R_NDS32_COPY 39 +#define R_NDS32_GLOB_DAT 40 +#define R_NDS32_JMP_SLOT 41 +#define R_NDS32_RELATIVE 42 +#define R_NDS32_GOTOFF 43 +#define R_NDS32_GOTPC20 44 +#define R_NDS32_GOT_HI20 45 +#define R_NDS32_GOT_LO12 46 +#define R_NDS32_GOTPC_HI20 47 +#define R_NDS32_GOTPC_LO12 48 +#define R_NDS32_GOTOFF_HI20 49 +#define R_NDS32_GOTOFF_LO12 50 +#define R_NDS32_INSN16 51 +#define R_NDS32_LABEL 52 +#define R_NDS32_LONGCALL1 53 +#define R_NDS32_LONGCALL2 54 +#define R_NDS32_LONGCALL3 55 +#define R_NDS32_LONGJUMP1 56 +#define R_NDS32_LONGJUMP2 57 +#define R_NDS32_LONGJUMP3 58 +#define R_NDS32_LOADSTORE 59 +#define R_NDS32_9_FIXED_RELA 60 +#define R_NDS32_15_FIXED_RELA 61 +#define R_NDS32_17_FIXED_RELA 62 +#define R_NDS32_25_FIXED_RELA 63 +#define R_NDS32_PLTREL_HI20 64 +#define R_NDS32_PLTREL_LO12 65 +#define R_NDS32_PLT_GOTREL_HI20 66 +#define R_NDS32_PLT_GOTREL_LO12 67 +#define R_NDS32_LO12S0_ORI_RELA 72 +#define R_NDS32_DWARF2_OP1_RELA 77 +#define R_NDS32_DWARF2_OP2_RELA 78 +#define R_NDS32_DWARF2_LEB_RELA 79 +#define R_NDS32_WORD_9_PCREL_RELA 94 +#define R_NDS32_LONGCALL4 107 +#define R_NDS32_RELA_NOP_MIX 192 +#define R_NDS32_RELA_NOP_MAX 255 + +#define ELF_NGREG (sizeof (struct user_pt_regs) / sizeof(elf_greg_t)) +#define ELF_CORE_COPY_REGS(dest, regs) \ + *(struct user_pt_regs *)&(dest) = (regs)->user_regs; + +typedef elf_greg_t elf_gregset_t[ELF_NGREG]; + +/* Core file format: The core file is written in such a way that gdb + can understand it and provide useful information to the user (under + linux we use the 'trad-core' bfd). There are quite a number of + obstacles to being able to view the contents of the floating point + registers, and until these are solved you will not be able to view the + contents of them. Actually, you can read in the core file and look at + the contents of the user struct to find out what the floating point + registers contain. + The actual file contents are as follows: + UPAGE: 1 page consisting of a user struct that tells gdb what is present + in the file. Directly after this is a copy of the task_struct, which + is currently not used by gdb, but it may come in useful at some point. + All of the registers are stored as part of the upage. The upage should + always be only one page. + DATA: The data area is stored. We use current->end_text to + current->brk to pick up all of the user variables, plus any memory + that may have been malloced. No attempt is made to determine if a page + is demand-zero or if a page is totally unused, we just cover the entire + range. All of the addresses are rounded in such a way that an integral + number of pages is written. + STACK: We need the stack information in order to get a meaningful + backtrace. We need to write the data from (esp) to + current->start_stack, so we round each of these off in order to be able + to write an integer number of pages. + The minimum core file size is 3 pages, or 12288 bytes. +*/ + +struct user_fp { + unsigned long long fd_regs[32]; + unsigned long fpcsr; +}; + +typedef struct user_fp elf_fpregset_t; + +struct elf32_hdr; +#define elf_check_arch(x) ((x)->e_machine == EM_NDS32) + +/* + * These are used to set parameters in the core dumps. + */ +#define ELF_CLASS ELFCLASS32 +#ifdef __NDS32_EB__ +#define ELF_DATA ELFDATA2MSB +#else +#define ELF_DATA ELFDATA2LSB +#endif +#define ELF_ARCH EM_NDS32 +#define USE_ELF_CORE_DUMP +#define ELF_EXEC_PAGESIZE PAGE_SIZE + +/* This is the location that an ET_DYN program is loaded if exec'ed. Typical + use of this is to invoke "./ld.so someprog" to test out a new version of + the loader. We need to make sure that it is out of the way of the program + that it will "exec", and that there is sufficient room for the brk. */ + +#define ELF_ET_DYN_BASE (2 * TASK_SIZE / 3) + +/* When the program starts, a1 contains a pointer to a function to be + registered with atexit, as per the SVR4 ABI. A value of 0 means we + have no such handler. */ +#define ELF_PLAT_INIT(_r, load_addr) (_r)->uregs[0] = 0 + +/* This yields a mask that user programs can use to figure out what + instruction set this cpu supports. */ + +#define ELF_HWCAP (elf_hwcap) + +#ifdef __KERNEL__ + +#define ELF_PLATFORM (NULL) + +/* Old NetWinder binaries were compiled in such a way that the iBCS + heuristic always trips on them. Until these binaries become uncommon + enough not to care, don't trust the `ibcs' flag here. In any case + there is no other ELF system currently supported by iBCS. + @@ Could print a warning message to encourage users to upgrade. */ +#define SET_PERSONALITY(ex) set_personality(PER_LINUX) + +#endif + +#define ARCH_DLINFO \ +do { \ + NEW_AUX_ENT(AT_SYSINFO_EHDR, \ + (elf_addr_t)current->mm->context.vdso); \ +} while (0) +#define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1 +struct linux_binprm; +int arch_setup_additional_pages(struct linux_binprm *, int); + +#endif diff --git a/arch/nds32/include/asm/fixmap.h b/arch/nds32/include/asm/fixmap.h new file mode 100644 index 000000000..0e60e153a --- /dev/null +++ b/arch/nds32/include/asm/fixmap.h @@ -0,0 +1,29 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#ifndef __ASM_NDS32_FIXMAP_H +#define __ASM_NDS32_FIXMAP_H + +#ifdef CONFIG_HIGHMEM +#include <linux/threads.h> +#include <asm/kmap_types.h> +#endif + +enum fixed_addresses { + FIX_HOLE, + FIX_KMAP_RESERVED, + FIX_KMAP_BEGIN, +#ifdef CONFIG_HIGHMEM + FIX_KMAP_END = FIX_KMAP_BEGIN + (KM_TYPE_NR * NR_CPUS), +#endif + FIX_EARLYCON_MEM_BASE, + __end_of_fixed_addresses +}; +#define FIXADDR_TOP ((unsigned long) (-(16 * PAGE_SIZE))) +#define FIXADDR_SIZE ((__end_of_fixed_addresses) << PAGE_SHIFT) +#define FIXADDR_START (FIXADDR_TOP - FIXADDR_SIZE) +#define FIXMAP_PAGE_IO __pgprot(PAGE_DEVICE) +void __set_fixmap(enum fixed_addresses idx, phys_addr_t phys, pgprot_t prot); + +#include <asm-generic/fixmap.h> +#endif /* __ASM_NDS32_FIXMAP_H */ diff --git a/arch/nds32/include/asm/ftrace.h b/arch/nds32/include/asm/ftrace.h new file mode 100644 index 000000000..2f96cc96a --- /dev/null +++ b/arch/nds32/include/asm/ftrace.h @@ -0,0 +1,46 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +#ifndef __ASM_NDS32_FTRACE_H +#define __ASM_NDS32_FTRACE_H + +#ifdef CONFIG_FUNCTION_TRACER + +#define HAVE_FUNCTION_GRAPH_FP_TEST + +#define MCOUNT_ADDR ((unsigned long)(_mcount)) +/* mcount call is composed of three instructions: + * sethi + ori + jral + */ +#define MCOUNT_INSN_SIZE 12 + +extern void _mcount(unsigned long parent_ip); + +#ifdef CONFIG_DYNAMIC_FTRACE + +#define FTRACE_ADDR ((unsigned long)_ftrace_caller) + +#ifdef __NDS32_EL__ +#define INSN_NOP 0x09000040 +#define INSN_SIZE(insn) (((insn & 0x00000080) == 0) ? 4 : 2) +#define IS_SETHI(insn) ((insn & 0x000000fe) == 0x00000046) +#define ENDIAN_CONVERT(insn) be32_to_cpu(insn) +#else /* __NDS32_EB__ */ +#define INSN_NOP 0x40000009 +#define INSN_SIZE(insn) (((insn & 0x80000000) == 0) ? 4 : 2) +#define IS_SETHI(insn) ((insn & 0xfe000000) == 0x46000000) +#define ENDIAN_CONVERT(insn) (insn) +#endif + +extern void _ftrace_caller(unsigned long parent_ip); +static inline unsigned long ftrace_call_adjust(unsigned long addr) +{ + return addr; +} +struct dyn_arch_ftrace { +}; + +#endif /* CONFIG_DYNAMIC_FTRACE */ + +#endif /* CONFIG_FUNCTION_TRACER */ + +#endif /* __ASM_NDS32_FTRACE_H */ diff --git a/arch/nds32/include/asm/futex.h b/arch/nds32/include/asm/futex.h new file mode 100644 index 000000000..cb6cb91cf --- /dev/null +++ b/arch/nds32/include/asm/futex.h @@ -0,0 +1,103 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#ifndef __NDS32_FUTEX_H__ +#define __NDS32_FUTEX_H__ + +#include <linux/futex.h> +#include <linux/uaccess.h> +#include <asm/errno.h> + +#define __futex_atomic_ex_table(err_reg) \ + " .pushsection __ex_table,\"a\"\n" \ + " .align 3\n" \ + " .long 1b, 4f\n" \ + " .long 2b, 4f\n" \ + " .popsection\n" \ + " .pushsection .fixup,\"ax\"\n" \ + "4: move %0, " err_reg "\n" \ + " b 3b\n" \ + " .popsection" + +#define __futex_atomic_op(insn, ret, oldval, tmp, uaddr, oparg) \ + smp_mb(); \ + asm volatile( \ + " movi $ta, #0\n" \ + "1: llw %1, [%2+$ta]\n" \ + " " insn "\n" \ + "2: scw %0, [%2+$ta]\n" \ + " beqz %0, 1b\n" \ + " movi %0, #0\n" \ + "3:\n" \ + __futex_atomic_ex_table("%4") \ + : "=&r" (ret), "=&r" (oldval) \ + : "r" (uaddr), "r" (oparg), "i" (-EFAULT) \ + : "cc", "memory") +static inline int +futex_atomic_cmpxchg_inatomic(u32 * uval, u32 __user * uaddr, + u32 oldval, u32 newval) +{ + int ret = 0; + u32 val, tmp, flags; + + if (!access_ok(VERIFY_WRITE, uaddr, sizeof(u32))) + return -EFAULT; + + smp_mb(); + asm volatile (" movi $ta, #0\n" + "1: llw %1, [%6 + $ta]\n" + " sub %3, %1, %4\n" + " cmovz %2, %5, %3\n" + " cmovn %2, %1, %3\n" + "2: scw %2, [%6 + $ta]\n" + " beqz %2, 1b\n" + "3:\n " __futex_atomic_ex_table("%7") + :"+&r"(ret), "=&r"(val), "=&r"(tmp), "=&r"(flags) + :"r"(oldval), "r"(newval), "r"(uaddr), "i"(-EFAULT) + :"$ta", "memory"); + smp_mb(); + + *uval = val; + return ret; +} + +static inline int +arch_futex_atomic_op_inuser(int op, int oparg, int *oval, u32 __user *uaddr) +{ + int oldval = 0, ret; + + + pagefault_disable(); + switch (op) { + case FUTEX_OP_SET: + __futex_atomic_op("move %0, %3", ret, oldval, tmp, uaddr, + oparg); + break; + case FUTEX_OP_ADD: + __futex_atomic_op("add %0, %1, %3", ret, oldval, tmp, uaddr, + oparg); + break; + case FUTEX_OP_OR: + __futex_atomic_op("or %0, %1, %3", ret, oldval, tmp, uaddr, + oparg); + break; + case FUTEX_OP_ANDN: + __futex_atomic_op("and %0, %1, %3", ret, oldval, tmp, uaddr, + ~oparg); + break; + case FUTEX_OP_XOR: + __futex_atomic_op("xor %0, %1, %3", ret, oldval, tmp, uaddr, + oparg); + break; + default: + ret = -ENOSYS; + } + + pagefault_enable(); + + if (!ret) + *oval = oldval; + + return ret; +} +#endif /* __NDS32_FUTEX_H__ */ diff --git a/arch/nds32/include/asm/highmem.h b/arch/nds32/include/asm/highmem.h new file mode 100644 index 000000000..425d546cb --- /dev/null +++ b/arch/nds32/include/asm/highmem.h @@ -0,0 +1,65 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#ifndef _ASM_HIGHMEM_H +#define _ASM_HIGHMEM_H + +#include <asm/proc-fns.h> +#include <asm/kmap_types.h> +#include <asm/fixmap.h> +#include <asm/pgtable.h> + +/* + * Right now we initialize only a single pte table. It can be extended + * easily, subsequent pte tables have to be allocated in one physical + * chunk of RAM. + */ +/* + * Ordering is (from lower to higher memory addresses): + * + * high_memory + * Persistent kmap area + * PKMAP_BASE + * fixed_addresses + * FIXADDR_START + * FIXADDR_TOP + * Vmalloc area + * VMALLOC_START + * VMALLOC_END + */ +#define PKMAP_BASE ((FIXADDR_START - PGDIR_SIZE) & (PGDIR_MASK)) +#define LAST_PKMAP PTRS_PER_PTE +#define LAST_PKMAP_MASK (LAST_PKMAP - 1) +#define PKMAP_NR(virt) (((virt) - (PKMAP_BASE)) >> PAGE_SHIFT) +#define PKMAP_ADDR(nr) (PKMAP_BASE + ((nr) << PAGE_SHIFT)) +#define kmap_prot PAGE_KERNEL + +static inline void flush_cache_kmaps(void) +{ + cpu_dcache_wbinval_all(); +} + +/* declarations for highmem.c */ +extern unsigned long highstart_pfn, highend_pfn; + +extern pte_t *pkmap_page_table; + +extern void *kmap_high(struct page *page); +extern void kunmap_high(struct page *page); + +extern void kmap_init(void); + +/* + * The following functions are already defined by <linux/highmem.h> + * when CONFIG_HIGHMEM is not set. + */ +#ifdef CONFIG_HIGHMEM +extern void *kmap(struct page *page); +extern void kunmap(struct page *page); +extern void *kmap_atomic(struct page *page); +extern void __kunmap_atomic(void *kvaddr); +extern void *kmap_atomic_pfn(unsigned long pfn); +extern struct page *kmap_atomic_to_page(void *ptr); +#endif + +#endif diff --git a/arch/nds32/include/asm/io.h b/arch/nds32/include/asm/io.h new file mode 100644 index 000000000..71cd226d6 --- /dev/null +++ b/arch/nds32/include/asm/io.h @@ -0,0 +1,85 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#ifndef __ASM_NDS32_IO_H +#define __ASM_NDS32_IO_H + +#include <linux/types.h> + +extern void iounmap(volatile void __iomem *addr); +#define __raw_writeb __raw_writeb +static inline void __raw_writeb(u8 val, volatile void __iomem *addr) +{ + asm volatile("sbi %0, [%1]" : : "r" (val), "r" (addr)); +} + +#define __raw_writew __raw_writew +static inline void __raw_writew(u16 val, volatile void __iomem *addr) +{ + asm volatile("shi %0, [%1]" : : "r" (val), "r" (addr)); +} + +#define __raw_writel __raw_writel +static inline void __raw_writel(u32 val, volatile void __iomem *addr) +{ + asm volatile("swi %0, [%1]" : : "r" (val), "r" (addr)); +} + +#define __raw_readb __raw_readb +static inline u8 __raw_readb(const volatile void __iomem *addr) +{ + u8 val; + + asm volatile("lbi %0, [%1]" : "=r" (val) : "r" (addr)); + return val; +} + +#define __raw_readw __raw_readw +static inline u16 __raw_readw(const volatile void __iomem *addr) +{ + u16 val; + + asm volatile("lhi %0, [%1]" : "=r" (val) : "r" (addr)); + return val; +} + +#define __raw_readl __raw_readl +static inline u32 __raw_readl(const volatile void __iomem *addr) +{ + u32 val; + + asm volatile("lwi %0, [%1]" : "=r" (val) : "r" (addr)); + return val; +} + +#define __iormb() rmb() +#define __iowmb() wmb() + +#define mmiowb() __asm__ __volatile__ ("msync all" : : : "memory"); + +/* + * {read,write}{b,w,l,q}_relaxed() are like the regular version, but + * are not guaranteed to provide ordering against spinlocks or memory + * accesses. + */ + +#define readb_relaxed(c) ({ u8 __v = __raw_readb(c); __v; }) +#define readw_relaxed(c) ({ u16 __v = le16_to_cpu((__force __le16)__raw_readw(c)); __v; }) +#define readl_relaxed(c) ({ u32 __v = le32_to_cpu((__force __le32)__raw_readl(c)); __v; }) +#define writeb_relaxed(v,c) ((void)__raw_writeb((v),(c))) +#define writew_relaxed(v,c) ((void)__raw_writew((__force u16)cpu_to_le16(v),(c))) +#define writel_relaxed(v,c) ((void)__raw_writel((__force u32)cpu_to_le32(v),(c))) + +/* + * {read,write}{b,w,l,q}() access little endian memory and return result in + * native endianness. + */ +#define readb(c) ({ u8 __v = readb_relaxed(c); __iormb(); __v; }) +#define readw(c) ({ u16 __v = readw_relaxed(c); __iormb(); __v; }) +#define readl(c) ({ u32 __v = readl_relaxed(c); __iormb(); __v; }) + +#define writeb(v,c) ({ __iowmb(); writeb_relaxed((v),(c)); }) +#define writew(v,c) ({ __iowmb(); writew_relaxed((v),(c)); }) +#define writel(v,c) ({ __iowmb(); writel_relaxed((v),(c)); }) +#include <asm-generic/io.h> +#endif /* __ASM_NDS32_IO_H */ diff --git a/arch/nds32/include/asm/irqflags.h b/arch/nds32/include/asm/irqflags.h new file mode 100644 index 000000000..2bfd00f8b --- /dev/null +++ b/arch/nds32/include/asm/irqflags.h @@ -0,0 +1,36 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#include <asm/nds32.h> +#include <nds32_intrinsic.h> + +#define arch_local_irq_disable() \ + GIE_DISABLE(); + +#define arch_local_irq_enable() \ + GIE_ENABLE(); +static inline unsigned long arch_local_irq_save(void) +{ + unsigned long flags; + flags = __nds32__mfsr(NDS32_SR_PSW) & PSW_mskGIE; + GIE_DISABLE(); + return flags; +} + +static inline unsigned long arch_local_save_flags(void) +{ + unsigned long flags; + flags = __nds32__mfsr(NDS32_SR_PSW) & PSW_mskGIE; + return flags; +} + +static inline void arch_local_irq_restore(unsigned long flags) +{ + if(flags) + GIE_ENABLE(); +} + +static inline int arch_irqs_disabled_flags(unsigned long flags) +{ + return !flags; +} diff --git a/arch/nds32/include/asm/l2_cache.h b/arch/nds32/include/asm/l2_cache.h new file mode 100644 index 000000000..37dd5ef61 --- /dev/null +++ b/arch/nds32/include/asm/l2_cache.h @@ -0,0 +1,137 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#ifndef L2_CACHE_H +#define L2_CACHE_H + +/* CCTL_CMD_OP */ +#define L2_CA_CONF_OFF 0x0 +#define L2_IF_CONF_OFF 0x4 +#define L2CC_SETUP_OFF 0x8 +#define L2CC_PROT_OFF 0xC +#define L2CC_CTRL_OFF 0x10 +#define L2_INT_EN_OFF 0x20 +#define L2_STA_OFF 0x24 +#define RDERR_ADDR_OFF 0x28 +#define WRERR_ADDR_OFF 0x2c +#define EVDPTERR_ADDR_OFF 0x30 +#define IMPL3ERR_ADDR_OFF 0x34 +#define L2_CNT0_CTRL_OFF 0x40 +#define L2_EVNT_CNT0_OFF 0x44 +#define L2_CNT1_CTRL_OFF 0x48 +#define L2_EVNT_CNT1_OFF 0x4c +#define L2_CCTL_CMD_OFF 0x60 +#define L2_CCTL_STATUS_OFF 0x64 +#define L2_LINE_TAG_OFF 0x68 +#define L2_LINE_DPT_OFF 0x70 + +#define CCTL_CMD_L2_IX_INVAL 0x0 +#define CCTL_CMD_L2_PA_INVAL 0x1 +#define CCTL_CMD_L2_IX_WB 0x2 +#define CCTL_CMD_L2_PA_WB 0x3 +#define CCTL_CMD_L2_PA_WBINVAL 0x5 +#define CCTL_CMD_L2_SYNC 0xa + +/* CCTL_CMD_TYPE */ +#define CCTL_SINGLE_CMD 0 +#define CCTL_BLOCK_CMD 0x10 +#define CCTL_ALL_CMD 0x10 + +/****************************************************************************** + * L2_CA_CONF (Cache architecture configuration) + *****************************************************************************/ +#define L2_CA_CONF_offL2SET 0 +#define L2_CA_CONF_offL2WAY 4 +#define L2_CA_CONF_offL2CLSZ 8 +#define L2_CA_CONF_offL2DW 11 +#define L2_CA_CONF_offL2PT 14 +#define L2_CA_CONF_offL2VER 16 + +#define L2_CA_CONF_mskL2SET (0xFUL << L2_CA_CONF_offL2SET) +#define L2_CA_CONF_mskL2WAY (0xFUL << L2_CA_CONF_offL2WAY) +#define L2_CA_CONF_mskL2CLSZ (0x7UL << L2_CA_CONF_offL2CLSZ) +#define L2_CA_CONF_mskL2DW (0x7UL << L2_CA_CONF_offL2DW) +#define L2_CA_CONF_mskL2PT (0x3UL << L2_CA_CONF_offL2PT) +#define L2_CA_CONF_mskL2VER (0xFFFFUL << L2_CA_CONF_offL2VER) + +/****************************************************************************** + * L2CC_SETUP (L2CC Setup register) + *****************************************************************************/ +#define L2CC_SETUP_offPART 0 +#define L2CC_SETUP_mskPART (0x3UL << L2CC_SETUP_offPART) +#define L2CC_SETUP_offDDLATC 4 +#define L2CC_SETUP_mskDDLATC (0x3UL << L2CC_SETUP_offDDLATC) +#define L2CC_SETUP_offTDLATC 8 +#define L2CC_SETUP_mskTDLATC (0x3UL << L2CC_SETUP_offTDLATC) + +/****************************************************************************** + * L2CC_PROT (L2CC Protect register) + *****************************************************************************/ +#define L2CC_PROT_offMRWEN 31 +#define L2CC_PROT_mskMRWEN (0x1UL << L2CC_PROT_offMRWEN) + +/****************************************************************************** + * L2_CCTL_STATUS_Mn (The L2CCTL command working status for Master n) + *****************************************************************************/ +#define L2CC_CTRL_offEN 31 +#define L2CC_CTRL_mskEN (0x1UL << L2CC_CTRL_offEN) + +/****************************************************************************** + * L2_CCTL_STATUS_Mn (The L2CCTL command working status for Master n) + *****************************************************************************/ +#define L2_CCTL_STATUS_offCMD_COMP 31 +#define L2_CCTL_STATUS_mskCMD_COMP (0x1 << L2_CCTL_STATUS_offCMD_COMP) + +extern void __iomem *atl2c_base; +#include <linux/smp.h> +#include <asm/io.h> +#include <asm/bitfield.h> + +#define L2C_R_REG(offset) readl(atl2c_base + offset) +#define L2C_W_REG(offset, value) writel(value, atl2c_base + offset) + +#define L2_CMD_RDY() \ + do{;}while((L2C_R_REG(L2_CCTL_STATUS_OFF) & L2_CCTL_STATUS_mskCMD_COMP) == 0) + +static inline unsigned long L2_CACHE_SET(void) +{ + return 64 << ((L2C_R_REG(L2_CA_CONF_OFF) & L2_CA_CONF_mskL2SET) >> + L2_CA_CONF_offL2SET); +} + +static inline unsigned long L2_CACHE_WAY(void) +{ + return 1 + + ((L2C_R_REG(L2_CA_CONF_OFF) & L2_CA_CONF_mskL2WAY) >> + L2_CA_CONF_offL2WAY); +} + +static inline unsigned long L2_CACHE_LINE_SIZE(void) +{ + + return 4 << ((L2C_R_REG(L2_CA_CONF_OFF) & L2_CA_CONF_mskL2CLSZ) >> + L2_CA_CONF_offL2CLSZ); +} + +static inline unsigned long GET_L2CC_CTRL_CPU(unsigned long cpu) +{ + if (cpu == smp_processor_id()) + return L2C_R_REG(L2CC_CTRL_OFF); + return L2C_R_REG(L2CC_CTRL_OFF + (cpu << 8)); +} + +static inline void SET_L2CC_CTRL_CPU(unsigned long cpu, unsigned long val) +{ + if (cpu == smp_processor_id()) + L2C_W_REG(L2CC_CTRL_OFF, val); + else + L2C_W_REG(L2CC_CTRL_OFF + (cpu << 8), val); +} + +static inline unsigned long GET_L2CC_STATUS_CPU(unsigned long cpu) +{ + if (cpu == smp_processor_id()) + return L2C_R_REG(L2_CCTL_STATUS_OFF); + return L2C_R_REG(L2_CCTL_STATUS_OFF + (cpu << 8)); +} +#endif diff --git a/arch/nds32/include/asm/linkage.h b/arch/nds32/include/asm/linkage.h new file mode 100644 index 000000000..e708c8bdb --- /dev/null +++ b/arch/nds32/include/asm/linkage.h @@ -0,0 +1,11 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#ifndef __ASM_LINKAGE_H +#define __ASM_LINKAGE_H + +/* This file is required by include/linux/linkage.h */ +#define __ALIGN .align 2 +#define __ALIGN_STR ".align 2" + +#endif diff --git a/arch/nds32/include/asm/memory.h b/arch/nds32/include/asm/memory.h new file mode 100644 index 000000000..60efc726b --- /dev/null +++ b/arch/nds32/include/asm/memory.h @@ -0,0 +1,105 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#ifndef __ASM_NDS32_MEMORY_H +#define __ASM_NDS32_MEMORY_H + +#include <linux/compiler.h> +#include <linux/sizes.h> + +#ifndef __ASSEMBLY__ +#include <asm/page.h> +#endif + +#ifndef PHYS_OFFSET +#define PHYS_OFFSET (0x0) +#endif + +#ifndef __virt_to_bus +#define __virt_to_bus __virt_to_phys +#endif + +#ifndef __bus_to_virt +#define __bus_to_virt __phys_to_virt +#endif + +/* + * TASK_SIZE - the maximum size of a user space task. + * TASK_UNMAPPED_BASE - the lower boundary of the mmap VM area + */ +#define TASK_SIZE ((CONFIG_PAGE_OFFSET) - (SZ_32M)) +#define TASK_UNMAPPED_BASE ALIGN(TASK_SIZE / 3, SZ_32M) +#define PAGE_OFFSET (CONFIG_PAGE_OFFSET) + +/* + * Physical vs virtual RAM address space conversion. These are + * private definitions which should NOT be used outside memory.h + * files. Use virt_to_phys/phys_to_virt/__pa/__va instead. + */ +#ifndef __virt_to_phys +#define __virt_to_phys(x) ((x) - PAGE_OFFSET + PHYS_OFFSET) +#define __phys_to_virt(x) ((x) - PHYS_OFFSET + PAGE_OFFSET) +#endif + +/* + * The module space lives between the addresses given by TASK_SIZE + * and PAGE_OFFSET - it must be within 32MB of the kernel text. + */ +#define MODULES_END (PAGE_OFFSET) +#define MODULES_VADDR (MODULES_END - SZ_32M) + +#if TASK_SIZE > MODULES_VADDR +#error Top of user space clashes with start of module space +#endif + +#ifndef __ASSEMBLY__ + +/* + * PFNs are used to describe any physical page; this means + * PFN 0 == physical address 0. + * + * This is the PFN of the first RAM page in the kernel + * direct-mapped view. We assume this is the first page + * of RAM in the mem_map as well. + */ +#define PHYS_PFN_OFFSET (PHYS_OFFSET >> PAGE_SHIFT) + +/* + * Drivers should NOT use these either. + */ +#define __pa(x) __virt_to_phys((unsigned long)(x)) +#define __va(x) ((void *)__phys_to_virt((unsigned long)(x))) + +/* + * Conversion between a struct page and a physical address. + * + * Note: when converting an unknown physical address to a + * struct page, the resulting pointer must be validated + * using VALID_PAGE(). It must return an invalid struct page + * for any physical address not corresponding to a system + * RAM address. + * + * pfn_valid(pfn) indicates whether a PFN number is valid + * + * virt_to_page(k) convert a _valid_ virtual address to struct page * + * virt_addr_valid(k) indicates whether a virtual address is valid + */ +#ifndef CONFIG_DISCONTIGMEM + +#define ARCH_PFN_OFFSET PHYS_PFN_OFFSET +#define pfn_valid(pfn) ((pfn) >= PHYS_PFN_OFFSET && (pfn) < (PHYS_PFN_OFFSET + max_mapnr)) + +#define virt_to_page(kaddr) (pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)) +#define virt_addr_valid(kaddr) ((unsigned long)(kaddr) >= PAGE_OFFSET && (unsigned long)(kaddr) < (unsigned long)high_memory) + +#else /* CONFIG_DISCONTIGMEM */ +#error CONFIG_DISCONTIGMEM is not supported yet. +#endif /* !CONFIG_DISCONTIGMEM */ + +#define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT) + +#endif + +#include <asm-generic/memory_model.h> + +#endif diff --git a/arch/nds32/include/asm/mmu.h b/arch/nds32/include/asm/mmu.h new file mode 100644 index 000000000..88b9ee8c1 --- /dev/null +++ b/arch/nds32/include/asm/mmu.h @@ -0,0 +1,12 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#ifndef __NDS32_MMU_H +#define __NDS32_MMU_H + +typedef struct { + unsigned int id; + void *vdso; +} mm_context_t; + +#endif diff --git a/arch/nds32/include/asm/mmu_context.h b/arch/nds32/include/asm/mmu_context.h new file mode 100644 index 000000000..fd7d13cef --- /dev/null +++ b/arch/nds32/include/asm/mmu_context.h @@ -0,0 +1,68 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#ifndef __ASM_NDS32_MMU_CONTEXT_H +#define __ASM_NDS32_MMU_CONTEXT_H + +#include <linux/spinlock.h> +#include <asm/tlbflush.h> +#include <asm/proc-fns.h> +#include <asm-generic/mm_hooks.h> + +static inline int +init_new_context(struct task_struct *tsk, struct mm_struct *mm) +{ + mm->context.id = 0; + return 0; +} + +#define destroy_context(mm) do { } while(0) + +#define CID_BITS 9 +extern spinlock_t cid_lock; +extern unsigned int cpu_last_cid; + +static inline void __new_context(struct mm_struct *mm) +{ + unsigned int cid; + unsigned long flags; + + spin_lock_irqsave(&cid_lock, flags); + cid = cpu_last_cid; + cpu_last_cid += 1 << TLB_MISC_offCID; + if (cpu_last_cid == 0) + cpu_last_cid = 1 << TLB_MISC_offCID << CID_BITS; + + if ((cid & TLB_MISC_mskCID) == 0) + flush_tlb_all(); + spin_unlock_irqrestore(&cid_lock, flags); + + mm->context.id = cid; +} + +static inline void check_context(struct mm_struct *mm) +{ + if (unlikely + ((mm->context.id ^ cpu_last_cid) >> TLB_MISC_offCID >> CID_BITS)) + __new_context(mm); +} + +static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk) +{ +} + +static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next, + struct task_struct *tsk) +{ + unsigned int cpu = smp_processor_id(); + + if (!cpumask_test_and_set_cpu(cpu, mm_cpumask(next)) || prev != next) { + check_context(next); + cpu_switch_mm(next); + } +} + +#define deactivate_mm(tsk,mm) do { } while (0) +#define activate_mm(prev,next) switch_mm(prev, next, NULL) + +#endif diff --git a/arch/nds32/include/asm/module.h b/arch/nds32/include/asm/module.h new file mode 100644 index 000000000..16cf9c723 --- /dev/null +++ b/arch/nds32/include/asm/module.h @@ -0,0 +1,11 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#ifndef _ASM_NDS32_MODULE_H +#define _ASM_NDS32_MODULE_H + +#include <asm-generic/module.h> + +#define MODULE_ARCH_VERMAGIC "NDS32v3" + +#endif /* _ASM_NDS32_MODULE_H */ diff --git a/arch/nds32/include/asm/nds32.h b/arch/nds32/include/asm/nds32.h new file mode 100644 index 000000000..68c38151c --- /dev/null +++ b/arch/nds32/include/asm/nds32.h @@ -0,0 +1,82 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#ifndef _ASM_NDS32_NDS32_H_ +#define _ASM_NDS32_NDS32_H_ + +#include <asm/bitfield.h> +#include <asm/cachectl.h> + +#ifndef __ASSEMBLY__ +#include <linux/init.h> +#include <asm/barrier.h> +#include <nds32_intrinsic.h> + +#ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE +#define FP_OFFSET (-3) +#else +#define FP_OFFSET (-2) +#endif +#define LP_OFFSET (-1) + +extern void __init early_trap_init(void); +static inline void GIE_ENABLE(void) +{ + mb(); + __nds32__gie_en(); +} + +static inline void GIE_DISABLE(void) +{ + mb(); + __nds32__gie_dis(); +} + +static inline unsigned long CACHE_SET(unsigned char cache) +{ + + if (cache == ICACHE) + return 64 << ((__nds32__mfsr(NDS32_SR_ICM_CFG) & ICM_CFG_mskISET) >> + ICM_CFG_offISET); + else + return 64 << ((__nds32__mfsr(NDS32_SR_DCM_CFG) & DCM_CFG_mskDSET) >> + DCM_CFG_offDSET); +} + +static inline unsigned long CACHE_WAY(unsigned char cache) +{ + + if (cache == ICACHE) + return 1 + + ((__nds32__mfsr(NDS32_SR_ICM_CFG) & ICM_CFG_mskIWAY) >> ICM_CFG_offIWAY); + else + return 1 + + ((__nds32__mfsr(NDS32_SR_DCM_CFG) & DCM_CFG_mskDWAY) >> DCM_CFG_offDWAY); +} + +static inline unsigned long CACHE_LINE_SIZE(unsigned char cache) +{ + + if (cache == ICACHE) + return 8 << + (((__nds32__mfsr(NDS32_SR_ICM_CFG) & ICM_CFG_mskISZ) >> ICM_CFG_offISZ) - 1); + else + return 8 << + (((__nds32__mfsr(NDS32_SR_DCM_CFG) & DCM_CFG_mskDSZ) >> DCM_CFG_offDSZ) - 1); +} + +#endif /* __ASSEMBLY__ */ + +#define IVB_BASE PHYS_OFFSET /* in user space for intr/exc/trap/break table base, 64KB aligned + * We defined at the start of the physical memory */ + +/* dispatched sub-entry exception handler numbering */ +#define RD_PROT 0 /* read protrection */ +#define WRT_PROT 1 /* write protection */ +#define NOEXEC 2 /* non executable */ +#define PAGE_MODIFY 3 /* page modified */ +#define ACC_BIT 4 /* access bit */ +#define RESVED_PTE 5 /* reserved PTE attribute */ +/* reserved 6 ~ 16 */ + +#endif /* _ASM_NDS32_NDS32_H_ */ diff --git a/arch/nds32/include/asm/page.h b/arch/nds32/include/asm/page.h new file mode 100644 index 000000000..947f0491c --- /dev/null +++ b/arch/nds32/include/asm/page.h @@ -0,0 +1,70 @@ +/* + * SPDX-License-Identifier: GPL-2.0 + * Copyright (C) 2005-2017 Andes Technology Corporation + */ + +#ifndef _ASMNDS32_PAGE_H +#define _ASMNDS32_PAGE_H + +#ifdef CONFIG_ANDES_PAGE_SIZE_4KB +#define PAGE_SHIFT 12 +#endif +#ifdef CONFIG_ANDES_PAGE_SIZE_8KB +#define PAGE_SHIFT 13 +#endif +#include <linux/const.h> +#define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT) +#define PAGE_MASK (~(PAGE_SIZE-1)) + +#ifdef __KERNEL__ + +#ifndef __ASSEMBLY__ + +struct page; +struct vm_area_struct; +#ifdef CONFIG_CPU_CACHE_ALIASING +extern void copy_user_highpage(struct page *to, struct page *from, + unsigned long vaddr, struct vm_area_struct *vma); +extern void clear_user_highpage(struct page *page, unsigned long vaddr); + +void copy_user_page(void *vto, void *vfrom, unsigned long vaddr, + struct page *to); +void clear_user_page(void *addr, unsigned long vaddr, struct page *page); +#define __HAVE_ARCH_COPY_USER_HIGHPAGE +#define clear_user_highpage clear_user_highpage +#else +#define clear_user_page(page, vaddr, pg) clear_page(page) +#define copy_user_page(to, from, vaddr, pg) copy_page(to, from) +#endif + +void clear_page(void *page); +void copy_page(void *to, void *from); + +typedef unsigned long pte_t; +typedef unsigned long pmd_t; +typedef unsigned long pgd_t; +typedef unsigned long pgprot_t; + +#define pte_val(x) (x) +#define pmd_val(x) (x) +#define pgd_val(x) (x) +#define pgprot_val(x) (x) + +#define __pte(x) (x) +#define __pmd(x) (x) +#define __pgd(x) (x) +#define __pgprot(x) (x) + +typedef struct page *pgtable_t; + +#include <asm/memory.h> +#include <asm-generic/getorder.h> + +#endif /* !__ASSEMBLY__ */ + +#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ + VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC) + +#endif /* __KERNEL__ */ + +#endif diff --git a/arch/nds32/include/asm/pgalloc.h b/arch/nds32/include/asm/pgalloc.h new file mode 100644 index 000000000..274488691 --- /dev/null +++ b/arch/nds32/include/asm/pgalloc.h @@ -0,0 +1,96 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#ifndef _ASMNDS32_PGALLOC_H +#define _ASMNDS32_PGALLOC_H + +#include <asm/processor.h> +#include <asm/cacheflush.h> +#include <asm/tlbflush.h> +#include <asm/proc-fns.h> + +/* + * Since we have only two-level page tables, these are trivial + */ +#define pmd_alloc_one(mm, addr) ({ BUG(); ((pmd_t *)2); }) +#define pmd_free(mm, pmd) do { } while (0) +#define pgd_populate(mm, pmd, pte) BUG() +#define pmd_pgtable(pmd) pmd_page(pmd) + +extern pgd_t *pgd_alloc(struct mm_struct *mm); +extern void pgd_free(struct mm_struct *mm, pgd_t * pgd); + +#define check_pgt_cache() do { } while (0) + +static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, + unsigned long addr) +{ + pte_t *pte; + + pte = + (pte_t *) __get_free_page(GFP_KERNEL | __GFP_RETRY_MAYFAIL | + __GFP_ZERO); + + return pte; +} + +static inline pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long addr) +{ + pgtable_t pte; + + pte = alloc_pages(GFP_KERNEL | __GFP_RETRY_MAYFAIL | __GFP_ZERO, 0); + if (pte) + cpu_dcache_wb_page((unsigned long)page_address(pte)); + + return pte; +} + +/* + * Free one PTE table. + */ +static inline void pte_free_kernel(struct mm_struct *mm, pte_t * pte) +{ + if (pte) { + free_page((unsigned long)pte); + } +} + +static inline void pte_free(struct mm_struct *mm, pgtable_t pte) +{ + __free_page(pte); +} + +/* + * Populate the pmdp entry with a pointer to the pte. This pmd is part + * of the mm address space. + * + * Ensure that we always set both PMD entries. + */ +static inline void +pmd_populate_kernel(struct mm_struct *mm, pmd_t * pmdp, pte_t * ptep) +{ + unsigned long pte_ptr = (unsigned long)ptep; + unsigned long pmdval; + + BUG_ON(mm != &init_mm); + + /* + * The pmd must be loaded with the physical + * address of the PTE table + */ + pmdval = __pa(pte_ptr) | _PAGE_KERNEL_TABLE; + set_pmd(pmdp, __pmd(pmdval)); +} + +static inline void +pmd_populate(struct mm_struct *mm, pmd_t * pmdp, pgtable_t ptep) +{ + unsigned long pmdval; + + BUG_ON(mm == &init_mm); + + pmdval = page_to_pfn(ptep) << PAGE_SHIFT | _PAGE_USER_TABLE; + set_pmd(pmdp, __pmd(pmdval)); +} + +#endif diff --git a/arch/nds32/include/asm/pgtable.h b/arch/nds32/include/asm/pgtable.h new file mode 100644 index 000000000..9f52db930 --- /dev/null +++ b/arch/nds32/include/asm/pgtable.h @@ -0,0 +1,410 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#ifndef _ASMNDS32_PGTABLE_H +#define _ASMNDS32_PGTABLE_H + +#define __PAGETABLE_PMD_FOLDED 1 +#include <asm-generic/4level-fixup.h> +#include <asm-generic/sizes.h> + +#include <asm/memory.h> +#include <asm/nds32.h> +#ifndef __ASSEMBLY__ +#include <asm/fixmap.h> +#include <asm/io.h> +#include <nds32_intrinsic.h> +#endif + +#ifdef CONFIG_ANDES_PAGE_SIZE_4KB +#define PGDIR_SHIFT 22 +#define PTRS_PER_PGD 1024 +#define PMD_SHIFT 22 +#define PTRS_PER_PMD 1 +#define PTRS_PER_PTE 1024 +#endif + +#ifdef CONFIG_ANDES_PAGE_SIZE_8KB +#define PGDIR_SHIFT 24 +#define PTRS_PER_PGD 256 +#define PMD_SHIFT 24 +#define PTRS_PER_PMD 1 +#define PTRS_PER_PTE 2048 +#endif + +#ifndef __ASSEMBLY__ +extern void __pte_error(const char *file, int line, unsigned long val); +extern void __pmd_error(const char *file, int line, unsigned long val); +extern void __pgd_error(const char *file, int line, unsigned long val); + +#define pte_ERROR(pte) __pte_error(__FILE__, __LINE__, pte_val(pte)) +#define pmd_ERROR(pmd) __pmd_error(__FILE__, __LINE__, pmd_val(pmd)) +#define pgd_ERROR(pgd) __pgd_error(__FILE__, __LINE__, pgd_val(pgd)) +#endif /* !__ASSEMBLY__ */ + +#define PMD_SIZE (1UL << PMD_SHIFT) +#define PMD_MASK (~(PMD_SIZE-1)) +#define PGDIR_SIZE (1UL << PGDIR_SHIFT) +#define PGDIR_MASK (~(PGDIR_SIZE-1)) + +/* + * This is the lowest virtual address we can permit any user space + * mapping to be mapped at. This is particularly important for + * non-high vector CPUs. + */ +#define FIRST_USER_ADDRESS 0x8000 + +#ifdef CONFIG_HIGHMEM +#define CONSISTENT_BASE ((PKMAP_BASE) - (SZ_2M)) +#define CONSISTENT_END (PKMAP_BASE) +#else +#define CONSISTENT_BASE (FIXADDR_START - SZ_2M) +#define CONSISTENT_END (FIXADDR_START) +#endif +#define CONSISTENT_OFFSET(x) (((unsigned long)(x) - CONSISTENT_BASE) >> PAGE_SHIFT) + +#ifdef CONFIG_HIGHMEM +#ifndef __ASSEMBLY__ +#include <asm/highmem.h> +#endif +#endif + +#define VMALLOC_RESERVE SZ_128M +#define VMALLOC_END (CONSISTENT_BASE - PAGE_SIZE) +#define VMALLOC_START ((VMALLOC_END) - VMALLOC_RESERVE) +#define VMALLOC_VMADDR(x) ((unsigned long)(x)) +#define MAXMEM __pa(VMALLOC_START) +#define MAXMEM_PFN PFN_DOWN(MAXMEM) + +#define FIRST_USER_PGD_NR 0 +#define USER_PTRS_PER_PGD ((TASK_SIZE/PGDIR_SIZE) + FIRST_USER_PGD_NR) + +/* L2 PTE */ +#define _PAGE_V (1UL << 0) + +#define _PAGE_M_XKRW (0UL << 1) +#define _PAGE_M_UR_KR (1UL << 1) +#define _PAGE_M_UR_KRW (2UL << 1) +#define _PAGE_M_URW_KRW (3UL << 1) +#define _PAGE_M_KR (5UL << 1) +#define _PAGE_M_KRW (7UL << 1) + +#define _PAGE_D (1UL << 4) +#define _PAGE_E (1UL << 5) +#define _PAGE_A (1UL << 6) +#define _PAGE_G (1UL << 7) + +#define _PAGE_C_DEV (0UL << 8) +#define _PAGE_C_DEV_WB (1UL << 8) +#define _PAGE_C_MEM (2UL << 8) +#define _PAGE_C_MEM_SHRD_WB (4UL << 8) +#define _PAGE_C_MEM_SHRD_WT (5UL << 8) +#define _PAGE_C_MEM_WB (6UL << 8) +#define _PAGE_C_MEM_WT (7UL << 8) + +#define _PAGE_L (1UL << 11) + +#define _HAVE_PAGE_L (_PAGE_L) +#define _PAGE_FILE (1UL << 1) +#define _PAGE_YOUNG 0 +#define _PAGE_M_MASK _PAGE_M_KRW +#define _PAGE_C_MASK _PAGE_C_MEM_WT + +#ifdef CONFIG_SMP +#ifdef CONFIG_CPU_DCACHE_WRITETHROUGH +#define _PAGE_CACHE_SHRD _PAGE_C_MEM_SHRD_WT +#else +#define _PAGE_CACHE_SHRD _PAGE_C_MEM_SHRD_WB +#endif +#else +#ifdef CONFIG_CPU_DCACHE_WRITETHROUGH +#define _PAGE_CACHE_SHRD _PAGE_C_MEM_WT +#else +#define _PAGE_CACHE_SHRD _PAGE_C_MEM_WB +#endif +#endif + +#ifdef CONFIG_CPU_DCACHE_WRITETHROUGH +#define _PAGE_CACHE _PAGE_C_MEM_WT +#else +#define _PAGE_CACHE _PAGE_C_MEM_WB +#endif + +/* + * + Level 1 descriptor (PMD) + */ +#define PMD_TYPE_TABLE 0 + +#ifndef __ASSEMBLY__ + +#define _PAGE_USER_TABLE PMD_TYPE_TABLE +#define _PAGE_KERNEL_TABLE PMD_TYPE_TABLE + +#define PAGE_EXEC __pgprot(_PAGE_V | _PAGE_M_XKRW | _PAGE_E) +#define PAGE_NONE __pgprot(_PAGE_V | _PAGE_M_KRW | _PAGE_A) +#define PAGE_READ __pgprot(_PAGE_V | _PAGE_M_UR_KR) +#define PAGE_RDWR __pgprot(_PAGE_V | _PAGE_M_URW_KRW | _PAGE_D) +#define PAGE_COPY __pgprot(_PAGE_V | _PAGE_M_UR_KR) + +#define PAGE_UXKRWX_V1 __pgprot(_PAGE_V | _PAGE_M_KRW | _PAGE_D | _PAGE_E | _PAGE_G | _PAGE_CACHE_SHRD) +#define PAGE_UXKRWX_V2 __pgprot(_PAGE_V | _PAGE_M_XKRW | _PAGE_D | _PAGE_E | _PAGE_G | _PAGE_CACHE_SHRD) +#define PAGE_URXKRWX_V2 __pgprot(_PAGE_V | _PAGE_M_UR_KRW | _PAGE_D | _PAGE_E | _PAGE_G | _PAGE_CACHE_SHRD) +#define PAGE_CACHE_L1 __pgprot(_HAVE_PAGE_L | _PAGE_V | _PAGE_M_KRW | _PAGE_D | _PAGE_E | _PAGE_G | _PAGE_CACHE) +#define PAGE_MEMORY __pgprot(_HAVE_PAGE_L | _PAGE_V | _PAGE_M_KRW | _PAGE_D | _PAGE_E | _PAGE_G | _PAGE_CACHE_SHRD) +#define PAGE_KERNEL __pgprot(_PAGE_V | _PAGE_M_KRW | _PAGE_D | _PAGE_E | _PAGE_G | _PAGE_CACHE_SHRD) +#define PAGE_SHARED __pgprot(_PAGE_V | _PAGE_M_URW_KRW | _PAGE_D | _PAGE_CACHE_SHRD) +#define PAGE_DEVICE __pgprot(_PAGE_V | _PAGE_M_KRW | _PAGE_D | _PAGE_G | _PAGE_C_DEV) +#endif /* __ASSEMBLY__ */ + +/* xwr */ +#define __P000 (PAGE_NONE | _PAGE_CACHE_SHRD) +#define __P001 (PAGE_READ | _PAGE_CACHE_SHRD) +#define __P010 (PAGE_COPY | _PAGE_CACHE_SHRD) +#define __P011 (PAGE_COPY | _PAGE_CACHE_SHRD) +#define __P100 (PAGE_EXEC | _PAGE_CACHE_SHRD) +#define __P101 (PAGE_READ | _PAGE_E | _PAGE_CACHE_SHRD) +#define __P110 (PAGE_COPY | _PAGE_E | _PAGE_CACHE_SHRD) +#define __P111 (PAGE_COPY | _PAGE_E | _PAGE_CACHE_SHRD) + +#define __S000 (PAGE_NONE | _PAGE_CACHE_SHRD) +#define __S001 (PAGE_READ | _PAGE_CACHE_SHRD) +#define __S010 (PAGE_RDWR | _PAGE_CACHE_SHRD) +#define __S011 (PAGE_RDWR | _PAGE_CACHE_SHRD) +#define __S100 (PAGE_EXEC | _PAGE_CACHE_SHRD) +#define __S101 (PAGE_READ | _PAGE_E | _PAGE_CACHE_SHRD) +#define __S110 (PAGE_RDWR | _PAGE_E | _PAGE_CACHE_SHRD) +#define __S111 (PAGE_RDWR | _PAGE_E | _PAGE_CACHE_SHRD) + +#ifndef __ASSEMBLY__ +/* + * ZERO_PAGE is a global shared page that is always zero: used + * for zero-mapped memory areas etc.. + */ +extern struct page *empty_zero_page; +extern void paging_init(void); +#define ZERO_PAGE(vaddr) (empty_zero_page) + +#define pte_pfn(pte) (pte_val(pte) >> PAGE_SHIFT) +#define pfn_pte(pfn,prot) (__pte(((pfn) << PAGE_SHIFT) | pgprot_val(prot))) + +#define pte_none(pte) !(pte_val(pte)) +#define pte_clear(mm,addr,ptep) set_pte_at((mm),(addr),(ptep), __pte(0)) +#define pte_page(pte) (pfn_to_page(pte_pfn(pte))) + +#define pte_index(address) (((address) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1)) +#define pte_offset_kernel(dir, address) ((pte_t *)pmd_page_kernel(*(dir)) + pte_index(address)) +#define pte_offset_map(dir, address) ((pte_t *)page_address(pmd_page(*(dir))) + pte_index(address)) +#define pte_offset_map_nested(dir, address) pte_offset_map(dir, address) +#define pmd_page_kernel(pmd) ((unsigned long) __va(pmd_val(pmd) & PAGE_MASK)) + +#define pte_unmap(pte) do { } while (0) +#define pte_unmap_nested(pte) do { } while (0) + +#define pmd_off_k(address) pmd_offset(pgd_offset_k(address), address) + +#define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval) +/* + * Set a level 1 translation table entry, and clean it out of + * any caches such that the MMUs can load it correctly. + */ +static inline void set_pmd(pmd_t * pmdp, pmd_t pmd) +{ + + *pmdp = pmd; +#if !defined(CONFIG_CPU_DCACHE_DISABLE) && !defined(CONFIG_CPU_DCACHE_WRITETHROUGH) + __asm__ volatile ("\n\tcctl %0, L1D_VA_WB"::"r" (pmdp):"memory"); + __nds32__msync_all(); + __nds32__dsb(); +#endif +} + +/* + * Set a PTE and flush it out + */ +static inline void set_pte(pte_t * ptep, pte_t pte) +{ + + *ptep = pte; +#if !defined(CONFIG_CPU_DCACHE_DISABLE) && !defined(CONFIG_CPU_DCACHE_WRITETHROUGH) + __asm__ volatile ("\n\tcctl %0, L1D_VA_WB"::"r" (ptep):"memory"); + __nds32__msync_all(); + __nds32__dsb(); +#endif +} + +/* + * The following only work if pte_present() is true. + * Undefined behaviour if not.. + */ + +/* + * pte_write: this page is writeable for user mode + * pte_read: this page is readable for user mode + * pte_kernel_write: this page is writeable for kernel mode + * + * We don't have pte_kernel_read because kernel always can read. + * + * */ + +#define pte_present(pte) (pte_val(pte) & _PAGE_V) +#define pte_write(pte) ((pte_val(pte) & _PAGE_M_MASK) == _PAGE_M_URW_KRW) +#define pte_read(pte) (((pte_val(pte) & _PAGE_M_MASK) == _PAGE_M_UR_KR) || \ + ((pte_val(pte) & _PAGE_M_MASK) == _PAGE_M_UR_KRW) || \ + ((pte_val(pte) & _PAGE_M_MASK) == _PAGE_M_URW_KRW)) +#define pte_kernel_write(pte) (((pte_val(pte) & _PAGE_M_MASK) == _PAGE_M_URW_KRW) || \ + ((pte_val(pte) & _PAGE_M_MASK) == _PAGE_M_UR_KRW) || \ + ((pte_val(pte) & _PAGE_M_MASK) == _PAGE_M_KRW) || \ + (((pte_val(pte) & _PAGE_M_MASK) == _PAGE_M_XKRW) && pte_exec(pte))) +#define pte_exec(pte) (pte_val(pte) & _PAGE_E) +#define pte_dirty(pte) (pte_val(pte) & _PAGE_D) +#define pte_young(pte) (pte_val(pte) & _PAGE_YOUNG) + +/* + * The following only works if pte_present() is not true. + */ +#define pte_file(pte) (pte_val(pte) & _PAGE_FILE) +#define pte_to_pgoff(x) (pte_val(x) >> 2) +#define pgoff_to_pte(x) __pte(((x) << 2) | _PAGE_FILE) + +#define PTE_FILE_MAX_BITS 29 + +#define PTE_BIT_FUNC(fn,op) \ +static inline pte_t pte_##fn(pte_t pte) { pte_val(pte) op; return pte; } + +static inline pte_t pte_wrprotect(pte_t pte) +{ + pte_val(pte) = pte_val(pte) & ~_PAGE_M_MASK; + pte_val(pte) = pte_val(pte) | _PAGE_M_UR_KR; + return pte; +} + +static inline pte_t pte_mkwrite(pte_t pte) +{ + pte_val(pte) = pte_val(pte) & ~_PAGE_M_MASK; + pte_val(pte) = pte_val(pte) | _PAGE_M_URW_KRW; + return pte; +} + +PTE_BIT_FUNC(exprotect, &=~_PAGE_E); +PTE_BIT_FUNC(mkexec, |=_PAGE_E); +PTE_BIT_FUNC(mkclean, &=~_PAGE_D); +PTE_BIT_FUNC(mkdirty, |=_PAGE_D); +PTE_BIT_FUNC(mkold, &=~_PAGE_YOUNG); +PTE_BIT_FUNC(mkyoung, |=_PAGE_YOUNG); +static inline int pte_special(pte_t pte) +{ + return 0; +} + +static inline pte_t pte_mkspecial(pte_t pte) +{ + return pte; +} + +/* + * Mark the prot value as uncacheable and unbufferable. + */ +#define pgprot_noncached(prot) __pgprot((pgprot_val(prot)&~_PAGE_C_MASK) | _PAGE_C_DEV) +#define pgprot_writecombine(prot) __pgprot((pgprot_val(prot)&~_PAGE_C_MASK) | _PAGE_C_DEV_WB) + +#define pmd_none(pmd) (pmd_val(pmd)&0x1) +#define pmd_present(pmd) (!pmd_none(pmd)) +#define pmd_bad(pmd) pmd_none(pmd) + +#define copy_pmd(pmdpd,pmdps) set_pmd((pmdpd), *(pmdps)) +#define pmd_clear(pmdp) set_pmd((pmdp), __pmd(1)) + +static inline pmd_t __mk_pmd(pte_t * ptep, unsigned long prot) +{ + unsigned long ptr = (unsigned long)ptep; + pmd_t pmd; + + /* + * The pmd must be loaded with the physical + * address of the PTE table + */ + + pmd_val(pmd) = __virt_to_phys(ptr) | prot; + return pmd; +} + +#define pmd_page(pmd) virt_to_page(__va(pmd_val(pmd))) + +/* + * Permanent address of a page. We never have highmem, so this is trivial. + */ +#define pages_to_mb(x) ((x) >> (20 - PAGE_SHIFT)) + +/* + * Conversion functions: convert a page and protection to a page entry, + * and a page entry and page directory to the page they refer to. + */ +#define mk_pte(page,prot) pfn_pte(page_to_pfn(page),prot) + +/* + * The "pgd_xxx()" functions here are trivial for a folded two-level + * setup: the pgd is never bad, and a pmd always exists (as it's folded + * into the pgd entry) + */ +#define pgd_none(pgd) (0) +#define pgd_bad(pgd) (0) +#define pgd_present(pgd) (1) +#define pgd_clear(pgdp) do { } while (0) + +#define page_pte_prot(page,prot) mk_pte(page, prot) +#define page_pte(page) mk_pte(page, __pgprot(0)) +/* + * L1PTE = $mr1 + ((virt >> PMD_SHIFT) << 2); + * L2PTE = (((virt >> PAGE_SHIFT) & (PTRS_PER_PTE -1 )) << 2); + * PPN = (phys & 0xfffff000); + * +*/ + +/* to find an entry in a page-table-directory */ +#define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1)) +#define pgd_offset(mm, address) ((mm)->pgd + pgd_index(address)) +/* to find an entry in a kernel page-table-directory */ +#define pgd_offset_k(addr) pgd_offset(&init_mm, addr) + +/* Find an entry in the second-level page table.. */ +#define pmd_offset(dir, addr) ((pmd_t *)(dir)) + +static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) +{ + const unsigned long mask = 0xfff; + pte_val(pte) = (pte_val(pte) & ~mask) | (pgprot_val(newprot) & mask); + return pte; +} + +extern pgd_t swapper_pg_dir[PTRS_PER_PGD]; + +/* Encode and decode a swap entry. + * + * We support up to 32GB of swap on 4k machines + */ +#define __swp_type(x) (((x).val >> 2) & 0x7f) +#define __swp_offset(x) ((x).val >> 9) +#define __swp_entry(type,offset) ((swp_entry_t) { ((type) << 2) | ((offset) << 9) }) +#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) }) +#define __swp_entry_to_pte(swp) ((pte_t) { (swp).val }) + +/* Needs to be defined here and not in linux/mm.h, as it is arch dependent */ +#define kern_addr_valid(addr) (1) + +#include <asm-generic/pgtable.h> + +/* + * We provide our own arch_get_unmapped_area to cope with VIPT caches. + */ +#define HAVE_ARCH_UNMAPPED_AREA + +/* + * remap a physical address `phys' of size `size' with page protection `prot' + * into virtual address `from' + */ + +#define pgtable_cache_init() do { } while (0) + +#endif /* !__ASSEMBLY__ */ + +#endif /* _ASMNDS32_PGTABLE_H */ diff --git a/arch/nds32/include/asm/proc-fns.h b/arch/nds32/include/asm/proc-fns.h new file mode 100644 index 000000000..bedc4f59e --- /dev/null +++ b/arch/nds32/include/asm/proc-fns.h @@ -0,0 +1,44 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#ifndef __NDS32_PROCFNS_H__ +#define __NDS32_PROCFNS_H__ + +#ifdef __KERNEL__ +#include <asm/page.h> + +struct mm_struct; +struct vm_area_struct; +extern void cpu_proc_init(void); +extern void cpu_proc_fin(void); +extern void cpu_do_idle(void); +extern void cpu_reset(unsigned long reset); +extern void cpu_switch_mm(struct mm_struct *mm); + +extern void cpu_dcache_inval_all(void); +extern void cpu_dcache_wbinval_all(void); +extern void cpu_dcache_inval_page(unsigned long page); +extern void cpu_dcache_wb_page(unsigned long page); +extern void cpu_dcache_wbinval_page(unsigned long page); +extern void cpu_dcache_inval_range(unsigned long start, unsigned long end); +extern void cpu_dcache_wb_range(unsigned long start, unsigned long end); +extern void cpu_dcache_wbinval_range(unsigned long start, unsigned long end); + +extern void cpu_icache_inval_all(void); +extern void cpu_icache_inval_page(unsigned long page); +extern void cpu_icache_inval_range(unsigned long start, unsigned long end); + +extern void cpu_cache_wbinval_page(unsigned long page, int flushi); +extern void cpu_cache_wbinval_range(unsigned long start, + unsigned long end, int flushi); +extern void cpu_cache_wbinval_range_check(struct vm_area_struct *vma, + unsigned long start, + unsigned long end, bool flushi, + bool wbd); + +extern void cpu_dma_wb_range(unsigned long start, unsigned long end); +extern void cpu_dma_inval_range(unsigned long start, unsigned long end); +extern void cpu_dma_wbinval_range(unsigned long start, unsigned long end); + +#endif /* __KERNEL__ */ +#endif /* __NDS32_PROCFNS_H__ */ diff --git a/arch/nds32/include/asm/processor.h b/arch/nds32/include/asm/processor.h new file mode 100644 index 000000000..9c83caf42 --- /dev/null +++ b/arch/nds32/include/asm/processor.h @@ -0,0 +1,103 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#ifndef __ASM_NDS32_PROCESSOR_H +#define __ASM_NDS32_PROCESSOR_H + +/* + * Default implementation of macro that returns current + * instruction pointer ("program counter"). + */ +#define current_text_addr() ({ __label__ _l; _l: &&_l;}) + +#ifdef __KERNEL__ + +#include <asm/ptrace.h> +#include <asm/types.h> +#include <asm/sigcontext.h> + +#define KERNEL_STACK_SIZE PAGE_SIZE +#define STACK_TOP TASK_SIZE +#define STACK_TOP_MAX TASK_SIZE + +struct cpu_context { + unsigned long r6; + unsigned long r7; + unsigned long r8; + unsigned long r9; + unsigned long r10; + unsigned long r11; + unsigned long r12; + unsigned long r13; + unsigned long r14; + unsigned long fp; + unsigned long pc; + unsigned long sp; +}; + +struct thread_struct { + struct cpu_context cpu_context; /* cpu context */ + /* fault info */ + unsigned long address; + unsigned long trap_no; + unsigned long error_code; +}; + +#define INIT_THREAD { } + +#ifdef __NDS32_EB__ +#define PSW_DE PSW_mskBE +#else +#define PSW_DE 0x0 +#endif + +#ifdef CONFIG_WBNA +#define PSW_valWBNA PSW_mskWBNA +#else +#define PSW_valWBNA 0x0 +#endif + +#ifdef CONFIG_HWZOL +#define PSW_valINIT (PSW_CPL_ANY | PSW_mskAEN | PSW_valWBNA | PSW_mskDT | PSW_mskIT | PSW_DE | PSW_mskGIE) +#else +#define PSW_valINIT (PSW_CPL_ANY | PSW_valWBNA | PSW_mskDT | PSW_mskIT | PSW_DE | PSW_mskGIE) +#endif + +#define start_thread(regs,pc,stack) \ +({ \ + memzero(regs, sizeof(struct pt_regs)); \ + forget_syscall(regs); \ + regs->ipsw = PSW_valINIT; \ + regs->ir0 = (PSW_CPL_ANY | PSW_valWBNA | PSW_mskDT | PSW_mskIT | PSW_DE | PSW_SYSTEM | PSW_INTL_1); \ + regs->ipc = pc; \ + regs->sp = stack; \ +}) + +/* Forward declaration, a strange C thing */ +struct task_struct; + +/* Free all resources held by a thread. */ +#define release_thread(thread) do { } while(0) + +/* Prepare to copy thread state - unlazy all lazy status */ +#define prepare_to_copy(tsk) do { } while (0) + +unsigned long get_wchan(struct task_struct *p); + +#define cpu_relax() barrier() + +#define task_pt_regs(task) \ + ((struct pt_regs *) (task_stack_page(task) + THREAD_SIZE \ + - 8) - 1) + +/* + * Create a new kernel thread + */ +extern int kernel_thread(int (*fn) (void *), void *arg, unsigned long flags); + +#define KSTK_EIP(tsk) instruction_pointer(task_pt_regs(tsk)) +#define KSTK_ESP(tsk) user_stack_pointer(task_pt_regs(tsk)) + +#endif + +#endif /* __ASM_NDS32_PROCESSOR_H */ diff --git a/arch/nds32/include/asm/ptrace.h b/arch/nds32/include/asm/ptrace.h new file mode 100644 index 000000000..c45388390 --- /dev/null +++ b/arch/nds32/include/asm/ptrace.h @@ -0,0 +1,77 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#ifndef __ASM_NDS32_PTRACE_H +#define __ASM_NDS32_PTRACE_H + +#include <uapi/asm/ptrace.h> + +/* + * If pt_regs.syscallno == NO_SYSCALL, then the thread is not executing + * a syscall -- i.e., its most recent entry into the kernel from + * userspace was not via syscall, or otherwise a tracer cancelled the + * syscall. + * + * This must have the value -1, for ABI compatibility with ptrace etc. + */ +#define NO_SYSCALL (-1) +#ifndef __ASSEMBLY__ +#include <linux/types.h> + +struct pt_regs { + union { + struct user_pt_regs user_regs; + struct { + long uregs[26]; + long fp; + long gp; + long lp; + long sp; + long ipc; +#if defined(CONFIG_HWZOL) + long lb; + long le; + long lc; +#else + long dummy[3]; +#endif + long syscallno; + }; + }; + long orig_r0; + long ir0; + long ipsw; + long pipsw; + long pipc; + long pp0; + long pp1; + long fucop_ctl; + long osp; +}; + +static inline bool in_syscall(struct pt_regs const *regs) +{ + return regs->syscallno != NO_SYSCALL; +} + +static inline void forget_syscall(struct pt_regs *regs) +{ + regs->syscallno = NO_SYSCALL; +} +static inline unsigned long regs_return_value(struct pt_regs *regs) +{ + return regs->uregs[0]; +} +extern void show_regs(struct pt_regs *); +/* Avoid circular header include via sched.h */ +struct task_struct; + +#define arch_has_single_step() (1) +#define user_mode(regs) (((regs)->ipsw & PSW_mskPOM) == 0) +#define interrupts_enabled(regs) (!!((regs)->ipsw & PSW_mskGIE)) +#define user_stack_pointer(regs) ((regs)->sp) +#define instruction_pointer(regs) ((regs)->ipc) +#define profile_pc(regs) instruction_pointer(regs) + +#endif /* __ASSEMBLY__ */ +#endif diff --git a/arch/nds32/include/asm/shmparam.h b/arch/nds32/include/asm/shmparam.h new file mode 100644 index 000000000..fd1cff64b --- /dev/null +++ b/arch/nds32/include/asm/shmparam.h @@ -0,0 +1,19 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#ifndef _ASMNDS32_SHMPARAM_H +#define _ASMNDS32_SHMPARAM_H + +/* + * This should be the size of the virtually indexed cache/ways, + * whichever is greater since the cache aliases every size/ways + * bytes. + */ +#define SHMLBA (4 * SZ_8K) /* attach addr a multiple of this */ + +/* + * Enforce SHMLBA in shmat + */ +#define __ARCH_FORCE_SHMLBA + +#endif /* _ASMNDS32_SHMPARAM_H */ diff --git a/arch/nds32/include/asm/string.h b/arch/nds32/include/asm/string.h new file mode 100644 index 000000000..179272caa --- /dev/null +++ b/arch/nds32/include/asm/string.h @@ -0,0 +1,17 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#ifndef __ASM_NDS32_STRING_H +#define __ASM_NDS32_STRING_H + +#define __HAVE_ARCH_MEMCPY +extern void *memcpy(void *, const void *, __kernel_size_t); + +#define __HAVE_ARCH_MEMMOVE +extern void *memmove(void *, const void *, __kernel_size_t); + +#define __HAVE_ARCH_MEMSET +extern void *memset(void *, int, __kernel_size_t); + +extern void *memzero(void *ptr, __kernel_size_t n); +#endif diff --git a/arch/nds32/include/asm/swab.h b/arch/nds32/include/asm/swab.h new file mode 100644 index 000000000..e01a755a3 --- /dev/null +++ b/arch/nds32/include/asm/swab.h @@ -0,0 +1,35 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#ifndef __NDS32_SWAB_H__ +#define __NDS32_SWAB_H__ + +#include <linux/types.h> +#include <linux/compiler.h> + +static __inline__ __attribute_const__ __u32 ___arch__swab32(__u32 x) +{ + __asm__("wsbh %0, %0\n\t" /* word swap byte within halfword */ + "rotri %0, %0, #16\n" + :"=r"(x) + :"0"(x)); + return x; +} + +static __inline__ __attribute_const__ __u16 ___arch__swab16(__u16 x) +{ + __asm__("wsbh %0, %0\n" /* word swap byte within halfword */ + :"=r"(x) + :"0"(x)); + return x; +} + +#define __arch_swab32(x) ___arch__swab32(x) +#define __arch_swab16(x) ___arch__swab16(x) + +#if !defined(__STRICT_ANSI__) || defined(__KERNEL__) +#define __BYTEORDER_HAS_U64__ +#define __SWAB_64_THRU_32__ +#endif + +#endif /* __NDS32_SWAB_H__ */ diff --git a/arch/nds32/include/asm/syscall.h b/arch/nds32/include/asm/syscall.h new file mode 100644 index 000000000..f7e5e8676 --- /dev/null +++ b/arch/nds32/include/asm/syscall.h @@ -0,0 +1,188 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2008-2009 Red Hat, Inc. All rights reserved. +// Copyright (C) 2005-2017 Andes Technology Corporation + +#ifndef _ASM_NDS32_SYSCALL_H +#define _ASM_NDS32_SYSCALL_H 1 + +#include <linux/err.h> +struct task_struct; +struct pt_regs; + +/** + * syscall_get_nr - find what system call a task is executing + * @task: task of interest, must be blocked + * @regs: task_pt_regs() of @task + * + * If @task is executing a system call or is at system call + * tracing about to attempt one, returns the system call number. + * If @task is not executing a system call, i.e. it's blocked + * inside the kernel for a fault or signal, returns -1. + * + * Note this returns int even on 64-bit machines. Only 32 bits of + * system call number can be meaningful. If the actual arch value + * is 64 bits, this truncates to 32 bits so 0xffffffff means -1. + * + * It's only valid to call this when @task is known to be blocked. + */ +int syscall_get_nr(struct task_struct *task, struct pt_regs *regs) +{ + return regs->syscallno; +} + +/** + * syscall_rollback - roll back registers after an aborted system call + * @task: task of interest, must be in system call exit tracing + * @regs: task_pt_regs() of @task + * + * It's only valid to call this when @task is stopped for system + * call exit tracing (due to TIF_SYSCALL_TRACE or TIF_SYSCALL_AUDIT), + * after tracehook_report_syscall_entry() returned nonzero to prevent + * the system call from taking place. + * + * This rolls back the register state in @regs so it's as if the + * system call instruction was a no-op. The registers containing + * the system call number and arguments are as they were before the + * system call instruction. This may not be the same as what the + * register state looked like at system call entry tracing. + */ +void syscall_rollback(struct task_struct *task, struct pt_regs *regs) +{ + regs->uregs[0] = regs->orig_r0; +} + +/** + * syscall_get_error - check result of traced system call + * @task: task of interest, must be blocked + * @regs: task_pt_regs() of @task + * + * Returns 0 if the system call succeeded, or -ERRORCODE if it failed. + * + * It's only valid to call this when @task is stopped for tracing on exit + * from a system call, due to %TIF_SYSCALL_TRACE or %TIF_SYSCALL_AUDIT. + */ +long syscall_get_error(struct task_struct *task, struct pt_regs *regs) +{ + unsigned long error = regs->uregs[0]; + return IS_ERR_VALUE(error) ? error : 0; +} + +/** + * syscall_get_return_value - get the return value of a traced system call + * @task: task of interest, must be blocked + * @regs: task_pt_regs() of @task + * + * Returns the return value of the successful system call. + * This value is meaningless if syscall_get_error() returned nonzero. + * + * It's only valid to call this when @task is stopped for tracing on exit + * from a system call, due to %TIF_SYSCALL_TRACE or %TIF_SYSCALL_AUDIT. + */ +long syscall_get_return_value(struct task_struct *task, struct pt_regs *regs) +{ + return regs->uregs[0]; +} + +/** + * syscall_set_return_value - change the return value of a traced system call + * @task: task of interest, must be blocked + * @regs: task_pt_regs() of @task + * @error: negative error code, or zero to indicate success + * @val: user return value if @error is zero + * + * This changes the results of the system call that user mode will see. + * If @error is zero, the user sees a successful system call with a + * return value of @val. If @error is nonzero, it's a negated errno + * code; the user sees a failed system call with this errno code. + * + * It's only valid to call this when @task is stopped for tracing on exit + * from a system call, due to %TIF_SYSCALL_TRACE or %TIF_SYSCALL_AUDIT. + */ +void syscall_set_return_value(struct task_struct *task, struct pt_regs *regs, + int error, long val) +{ + regs->uregs[0] = (long)error ? error : val; +} + +/** + * syscall_get_arguments - extract system call parameter values + * @task: task of interest, must be blocked + * @regs: task_pt_regs() of @task + * @i: argument index [0,5] + * @n: number of arguments; n+i must be [1,6]. + * @args: array filled with argument values + * + * Fetches @n arguments to the system call starting with the @i'th argument + * (from 0 through 5). Argument @i is stored in @args[0], and so on. + * An arch inline version is probably optimal when @i and @n are constants. + * + * It's only valid to call this when @task is stopped for tracing on + * entry to a system call, due to %TIF_SYSCALL_TRACE or %TIF_SYSCALL_AUDIT. + * It's invalid to call this with @i + @n > 6; we only support system calls + * taking up to 6 arguments. + */ +#define SYSCALL_MAX_ARGS 6 +void syscall_get_arguments(struct task_struct *task, struct pt_regs *regs, + unsigned int i, unsigned int n, unsigned long *args) +{ + if (n == 0) + return; + if (i + n > SYSCALL_MAX_ARGS) { + unsigned long *args_bad = args + SYSCALL_MAX_ARGS - i; + unsigned int n_bad = n + i - SYSCALL_MAX_ARGS; + pr_warning("%s called with max args %d, handling only %d\n", + __func__, i + n, SYSCALL_MAX_ARGS); + memset(args_bad, 0, n_bad * sizeof(args[0])); + memset(args_bad, 0, n_bad * sizeof(args[0])); + } + + if (i == 0) { + args[0] = regs->orig_r0; + args++; + i++; + n--; + } + + memcpy(args, ®s->uregs[0] + i, n * sizeof(args[0])); +} + +/** + * syscall_set_arguments - change system call parameter value + * @task: task of interest, must be in system call entry tracing + * @regs: task_pt_regs() of @task + * @i: argument index [0,5] + * @n: number of arguments; n+i must be [1,6]. + * @args: array of argument values to store + * + * Changes @n arguments to the system call starting with the @i'th argument. + * Argument @i gets value @args[0], and so on. + * An arch inline version is probably optimal when @i and @n are constants. + * + * It's only valid to call this when @task is stopped for tracing on + * entry to a system call, due to %TIF_SYSCALL_TRACE or %TIF_SYSCALL_AUDIT. + * It's invalid to call this with @i + @n > 6; we only support system calls + * taking up to 6 arguments. + */ +void syscall_set_arguments(struct task_struct *task, struct pt_regs *regs, + unsigned int i, unsigned int n, + const unsigned long *args) +{ + if (n == 0) + return; + + if (i + n > SYSCALL_MAX_ARGS) { + pr_warn("%s called with max args %d, handling only %d\n", + __func__, i + n, SYSCALL_MAX_ARGS); + n = SYSCALL_MAX_ARGS - i; + } + + if (i == 0) { + regs->orig_r0 = args[0]; + args++; + i++; + n--; + } + + memcpy(®s->uregs[0] + i, args, n * sizeof(args[0])); +} +#endif /* _ASM_NDS32_SYSCALL_H */ diff --git a/arch/nds32/include/asm/syscalls.h b/arch/nds32/include/asm/syscalls.h new file mode 100644 index 000000000..78778ecff --- /dev/null +++ b/arch/nds32/include/asm/syscalls.h @@ -0,0 +1,13 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#ifndef __ASM_NDS32_SYSCALLS_H +#define __ASM_NDS32_SYSCALLS_H + +asmlinkage long sys_cacheflush(unsigned long addr, unsigned long len, unsigned int op); +asmlinkage long sys_fadvise64_64_wrapper(int fd, int advice, loff_t offset, loff_t len); +asmlinkage long sys_rt_sigreturn_wrapper(void); + +#include <asm-generic/syscalls.h> + +#endif /* __ASM_NDS32_SYSCALLS_H */ diff --git a/arch/nds32/include/asm/thread_info.h b/arch/nds32/include/asm/thread_info.h new file mode 100644 index 000000000..bff741ff3 --- /dev/null +++ b/arch/nds32/include/asm/thread_info.h @@ -0,0 +1,76 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#ifndef __ASM_NDS32_THREAD_INFO_H +#define __ASM_NDS32_THREAD_INFO_H + +#ifdef __KERNEL__ + +#define THREAD_SIZE_ORDER (1) +#define THREAD_SIZE (PAGE_SIZE << THREAD_SIZE_ORDER) + +#ifndef __ASSEMBLY__ + +struct task_struct; + +#include <asm/ptrace.h> +#include <asm/types.h> + +typedef unsigned long mm_segment_t; + +/* + * low level task data that entry.S needs immediate access to. + * __switch_to() assumes cpu_context follows immediately after cpu_domain. + */ +struct thread_info { + unsigned long flags; /* low level flags */ + __s32 preempt_count; /* 0 => preemptable, <0 => bug */ + mm_segment_t addr_limit; /* address limit */ +}; +#define INIT_THREAD_INFO(tsk) \ +{ \ + .preempt_count = INIT_PREEMPT_COUNT, \ + .addr_limit = KERNEL_DS, \ +} +#define thread_saved_pc(tsk) ((unsigned long)(tsk->thread.cpu_context.pc)) +#define thread_saved_fp(tsk) ((unsigned long)(tsk->thread.cpu_context.fp)) +#endif + +/* + * thread information flags: + * TIF_SYSCALL_TRACE - syscall trace active + * TIF_SIGPENDING - signal pending + * TIF_NEED_RESCHED - rescheduling necessary + * TIF_NOTIFY_RESUME - callback before returning to user + * TIF_USEDFPU - FPU was used by this task this quantum (SMP) + * TIF_POLLING_NRFLAG - true if poll_idle() is polling TIF_NEED_RESCHED + */ +#define TIF_SIGPENDING 1 +#define TIF_NEED_RESCHED 2 +#define TIF_SINGLESTEP 3 +#define TIF_NOTIFY_RESUME 4 /* callback before returning to user */ +#define TIF_SYSCALL_TRACE 8 +#define TIF_USEDFPU 16 +#define TIF_POLLING_NRFLAG 17 +#define TIF_MEMDIE 18 +#define TIF_FREEZE 19 +#define TIF_RESTORE_SIGMASK 20 + +#define _TIF_SIGPENDING (1 << TIF_SIGPENDING) +#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED) +#define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME) +#define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP) +#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE) +#define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG) +#define _TIF_FREEZE (1 << TIF_FREEZE) +#define _TIF_RESTORE_SIGMASK (1 << TIF_RESTORE_SIGMASK) + +/* + * Change these and you break ASM code in entry-common.S + */ +#define _TIF_WORK_MASK 0x000000ff +#define _TIF_WORK_SYSCALL_ENTRY (_TIF_SYSCALL_TRACE | _TIF_SINGLESTEP) +#define _TIF_WORK_SYSCALL_LEAVE (_TIF_SYSCALL_TRACE | _TIF_SINGLESTEP) + +#endif /* __KERNEL__ */ +#endif /* __ASM_NDS32_THREAD_INFO_H */ diff --git a/arch/nds32/include/asm/tlb.h b/arch/nds32/include/asm/tlb.h new file mode 100644 index 000000000..b35ae5eae --- /dev/null +++ b/arch/nds32/include/asm/tlb.h @@ -0,0 +1,28 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#ifndef __ASMNDS32_TLB_H +#define __ASMNDS32_TLB_H + +#define tlb_start_vma(tlb,vma) \ + do { \ + if (!tlb->fullmm) \ + flush_cache_range(vma, vma->vm_start, vma->vm_end); \ + } while (0) + +#define tlb_end_vma(tlb,vma) \ + do { \ + if(!tlb->fullmm) \ + flush_tlb_range(vma, vma->vm_start, vma->vm_end); \ + } while (0) + +#define __tlb_remove_tlb_entry(tlb, pte, addr) do { } while (0) + +#define tlb_flush(tlb) flush_tlb_mm((tlb)->mm) + +#include <asm-generic/tlb.h> + +#define __pte_free_tlb(tlb, pte, addr) pte_free((tlb)->mm, pte) +#define __pmd_free_tlb(tlb, pmd, addr) pmd_free((tln)->mm, pmd) + +#endif diff --git a/arch/nds32/include/asm/tlbflush.h b/arch/nds32/include/asm/tlbflush.h new file mode 100644 index 000000000..9b411f401 --- /dev/null +++ b/arch/nds32/include/asm/tlbflush.h @@ -0,0 +1,47 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#ifndef _ASMNDS32_TLBFLUSH_H +#define _ASMNDS32_TLBFLUSH_H + +#include <linux/spinlock.h> +#include <linux/mm.h> +#include <nds32_intrinsic.h> + +static inline void local_flush_tlb_all(void) +{ + __nds32__tlbop_flua(); + __nds32__isb(); +} + +static inline void local_flush_tlb_mm(struct mm_struct *mm) +{ + __nds32__tlbop_flua(); + __nds32__isb(); +} + +static inline void local_flush_tlb_kernel_range(unsigned long start, + unsigned long end) +{ + while (start < end) { + __nds32__tlbop_inv(start); + __nds32__isb(); + start += PAGE_SIZE; + } +} + +void local_flush_tlb_range(struct vm_area_struct *vma, + unsigned long start, unsigned long end); +void local_flush_tlb_page(struct vm_area_struct *vma, unsigned long addr); + +#define flush_tlb_all local_flush_tlb_all +#define flush_tlb_mm local_flush_tlb_mm +#define flush_tlb_range local_flush_tlb_range +#define flush_tlb_page local_flush_tlb_page +#define flush_tlb_kernel_range local_flush_tlb_kernel_range + +void update_mmu_cache(struct vm_area_struct *vma, + unsigned long address, pte_t * pte); +void tlb_migrate_finish(struct mm_struct *mm); + +#endif diff --git a/arch/nds32/include/asm/uaccess.h b/arch/nds32/include/asm/uaccess.h new file mode 100644 index 000000000..c8b4b8cc6 --- /dev/null +++ b/arch/nds32/include/asm/uaccess.h @@ -0,0 +1,304 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#ifndef _ASMANDES_UACCESS_H +#define _ASMANDES_UACCESS_H + +/* + * User space memory access functions + */ +#include <linux/sched.h> +#include <asm/errno.h> +#include <asm/memory.h> +#include <asm/types.h> +#include <linux/mm.h> + +#define VERIFY_READ 0 +#define VERIFY_WRITE 1 + +#define __asmeq(x, y) ".ifnc " x "," y " ; .err ; .endif\n\t" + +/* + * The exception table consists of pairs of addresses: the first is the + * address of an instruction that is allowed to fault, and the second is + * the address at which the program should continue. No registers are + * modified, so it is entirely up to the continuation code to figure out + * what to do. + * + * All the routines below use bits of fixup code that are out of line + * with the main instruction path. This means when everything is well, + * we don't even have to jump over them. Further, they do not intrude + * on our cache or tlb entries. + */ + +struct exception_table_entry { + unsigned long insn, fixup; +}; + +extern int fixup_exception(struct pt_regs *regs); + +#define KERNEL_DS ((mm_segment_t) { ~0UL }) +#define USER_DS ((mm_segment_t) {TASK_SIZE - 1}) + +#define get_ds() (KERNEL_DS) +#define get_fs() (current_thread_info()->addr_limit) +#define user_addr_max get_fs + +static inline void set_fs(mm_segment_t fs) +{ + current_thread_info()->addr_limit = fs; +} + +#define segment_eq(a, b) ((a) == (b)) + +#define __range_ok(addr, size) (size <= get_fs() && addr <= (get_fs() -size)) + +#define access_ok(type, addr, size) \ + __range_ok((unsigned long)addr, (unsigned long)size) +/* + * Single-value transfer routines. They automatically use the right + * size if we just have the right pointer type. Note that the functions + * which read from user space (*get_*) need to take care not to leak + * kernel data even if the calling code is buggy and fails to check + * the return value. This means zeroing out the destination variable + * or buffer on error. Normally this is done out of line by the + * fixup code, but there are a few places where it intrudes on the + * main code path. When we only write to user space, there is no + * problem. + * + * The "__xxx" versions of the user access functions do not verify the + * address space - it must have been done previously with a separate + * "access_ok()" call. + * + * The "xxx_error" versions set the third argument to EFAULT if an + * error occurs, and leave it unchanged on success. Note that these + * versions are void (ie, don't return a value as such). + */ + +#define get_user(x, ptr) \ +({ \ + long __gu_err = 0; \ + __get_user_check((x), (ptr), __gu_err); \ + __gu_err; \ +}) + +#define __get_user_error(x, ptr, err) \ +({ \ + __get_user_check((x), (ptr), (err)); \ + (void)0; \ +}) + +#define __get_user(x, ptr) \ +({ \ + long __gu_err = 0; \ + const __typeof__(*(ptr)) __user *__p = (ptr); \ + __get_user_err((x), __p, (__gu_err)); \ + __gu_err; \ +}) + +#define __get_user_check(x, ptr, err) \ +({ \ + const __typeof__(*(ptr)) __user *__p = (ptr); \ + might_fault(); \ + if (access_ok(VERIFY_READ, __p, sizeof(*__p))) { \ + __get_user_err((x), __p, (err)); \ + } else { \ + (x) = 0; (err) = -EFAULT; \ + } \ +}) + +#define __get_user_err(x, ptr, err) \ +do { \ + unsigned long __gu_val; \ + __chk_user_ptr(ptr); \ + switch (sizeof(*(ptr))) { \ + case 1: \ + __get_user_asm("lbi", __gu_val, (ptr), (err)); \ + break; \ + case 2: \ + __get_user_asm("lhi", __gu_val, (ptr), (err)); \ + break; \ + case 4: \ + __get_user_asm("lwi", __gu_val, (ptr), (err)); \ + break; \ + case 8: \ + __get_user_asm_dword(__gu_val, (ptr), (err)); \ + break; \ + default: \ + BUILD_BUG(); \ + break; \ + } \ + (x) = (__force __typeof__(*(ptr)))__gu_val; \ +} while (0) + +#define __get_user_asm(inst, x, addr, err) \ + __asm__ __volatile__ ( \ + "1: "inst" %1,[%2]\n" \ + "2:\n" \ + " .section .fixup,\"ax\"\n" \ + " .align 2\n" \ + "3: move %0, %3\n" \ + " move %1, #0\n" \ + " b 2b\n" \ + " .previous\n" \ + " .section __ex_table,\"a\"\n" \ + " .align 3\n" \ + " .long 1b, 3b\n" \ + " .previous" \ + : "+r" (err), "=&r" (x) \ + : "r" (addr), "i" (-EFAULT) \ + : "cc") + +#ifdef __NDS32_EB__ +#define __gu_reg_oper0 "%H1" +#define __gu_reg_oper1 "%L1" +#else +#define __gu_reg_oper0 "%L1" +#define __gu_reg_oper1 "%H1" +#endif + +#define __get_user_asm_dword(x, addr, err) \ + __asm__ __volatile__ ( \ + "\n1:\tlwi " __gu_reg_oper0 ",[%2]\n" \ + "\n2:\tlwi " __gu_reg_oper1 ",[%2+4]\n" \ + "3:\n" \ + " .section .fixup,\"ax\"\n" \ + " .align 2\n" \ + "4: move %0, %3\n" \ + " b 3b\n" \ + " .previous\n" \ + " .section __ex_table,\"a\"\n" \ + " .align 3\n" \ + " .long 1b, 4b\n" \ + " .long 2b, 4b\n" \ + " .previous" \ + : "+r"(err), "=&r"(x) \ + : "r"(addr), "i"(-EFAULT) \ + : "cc") + +#define put_user(x, ptr) \ +({ \ + long __pu_err = 0; \ + __put_user_check((x), (ptr), __pu_err); \ + __pu_err; \ +}) + +#define __put_user(x, ptr) \ +({ \ + long __pu_err = 0; \ + __typeof__(*(ptr)) __user *__p = (ptr); \ + __put_user_err((x), __p, __pu_err); \ + __pu_err; \ +}) + +#define __put_user_error(x, ptr, err) \ +({ \ + __put_user_err((x), (ptr), (err)); \ + (void)0; \ +}) + +#define __put_user_check(x, ptr, err) \ +({ \ + __typeof__(*(ptr)) __user *__p = (ptr); \ + might_fault(); \ + if (access_ok(VERIFY_WRITE, __p, sizeof(*__p))) { \ + __put_user_err((x), __p, (err)); \ + } else { \ + (err) = -EFAULT; \ + } \ +}) + +#define __put_user_err(x, ptr, err) \ +do { \ + __typeof__(*(ptr)) __pu_val = (x); \ + __chk_user_ptr(ptr); \ + switch (sizeof(*(ptr))) { \ + case 1: \ + __put_user_asm("sbi", __pu_val, (ptr), (err)); \ + break; \ + case 2: \ + __put_user_asm("shi", __pu_val, (ptr), (err)); \ + break; \ + case 4: \ + __put_user_asm("swi", __pu_val, (ptr), (err)); \ + break; \ + case 8: \ + __put_user_asm_dword(__pu_val, (ptr), (err)); \ + break; \ + default: \ + BUILD_BUG(); \ + break; \ + } \ +} while (0) + +#define __put_user_asm(inst, x, addr, err) \ + __asm__ __volatile__ ( \ + "1: "inst" %1,[%2]\n" \ + "2:\n" \ + " .section .fixup,\"ax\"\n" \ + " .align 2\n" \ + "3: move %0, %3\n" \ + " b 2b\n" \ + " .previous\n" \ + " .section __ex_table,\"a\"\n" \ + " .align 3\n" \ + " .long 1b, 3b\n" \ + " .previous" \ + : "+r" (err) \ + : "r" (x), "r" (addr), "i" (-EFAULT) \ + : "cc") + +#ifdef __NDS32_EB__ +#define __pu_reg_oper0 "%H2" +#define __pu_reg_oper1 "%L2" +#else +#define __pu_reg_oper0 "%L2" +#define __pu_reg_oper1 "%H2" +#endif + +#define __put_user_asm_dword(x, addr, err) \ + __asm__ __volatile__ ( \ + "\n1:\tswi " __pu_reg_oper0 ",[%1]\n" \ + "\n2:\tswi " __pu_reg_oper1 ",[%1+4]\n" \ + "3:\n" \ + " .section .fixup,\"ax\"\n" \ + " .align 2\n" \ + "4: move %0, %3\n" \ + " b 3b\n" \ + " .previous\n" \ + " .section __ex_table,\"a\"\n" \ + " .align 3\n" \ + " .long 1b, 4b\n" \ + " .long 2b, 4b\n" \ + " .previous" \ + : "+r"(err) \ + : "r"(addr), "r"(x), "i"(-EFAULT) \ + : "cc") + +extern unsigned long __arch_clear_user(void __user * addr, unsigned long n); +extern long strncpy_from_user(char *dest, const char __user * src, long count); +extern __must_check long strlen_user(const char __user * str); +extern __must_check long strnlen_user(const char __user * str, long n); +extern unsigned long __arch_copy_from_user(void *to, const void __user * from, + unsigned long n); +extern unsigned long __arch_copy_to_user(void __user * to, const void *from, + unsigned long n); + +#define raw_copy_from_user __arch_copy_from_user +#define raw_copy_to_user __arch_copy_to_user + +#define INLINE_COPY_FROM_USER +#define INLINE_COPY_TO_USER +static inline unsigned long clear_user(void __user * to, unsigned long n) +{ + if (access_ok(VERIFY_WRITE, to, n)) + n = __arch_clear_user(to, n); + return n; +} + +static inline unsigned long __clear_user(void __user * to, unsigned long n) +{ + return __arch_clear_user(to, n); +} + +#endif /* _ASMNDS32_UACCESS_H */ diff --git a/arch/nds32/include/asm/unistd.h b/arch/nds32/include/asm/unistd.h new file mode 100644 index 000000000..b586a2862 --- /dev/null +++ b/arch/nds32/include/asm/unistd.h @@ -0,0 +1,6 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#define __ARCH_WANT_SYS_CLONE + +#include <uapi/asm/unistd.h> diff --git a/arch/nds32/include/asm/vdso.h b/arch/nds32/include/asm/vdso.h new file mode 100644 index 000000000..af2c6afc2 --- /dev/null +++ b/arch/nds32/include/asm/vdso.h @@ -0,0 +1,24 @@ +/* + * SPDX-License-Identifier: GPL-2.0 + * Copyright (C) 2005-2017 Andes Technology Corporation + */ + +#ifndef __ASM_VDSO_H +#define __ASM_VDSO_H + +#ifdef __KERNEL__ + +#ifndef __ASSEMBLY__ + +#include <generated/vdso-offsets.h> + +#define VDSO_SYMBOL(base, name) \ +({ \ + (unsigned long)(vdso_offset_##name + (unsigned long)(base)); \ +}) + +#endif /* !__ASSEMBLY__ */ + +#endif /* __KERNEL__ */ + +#endif /* __ASM_VDSO_H */ diff --git a/arch/nds32/include/asm/vdso_datapage.h b/arch/nds32/include/asm/vdso_datapage.h new file mode 100644 index 000000000..79db5a12c --- /dev/null +++ b/arch/nds32/include/asm/vdso_datapage.h @@ -0,0 +1,36 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2012 ARM Limited +// Copyright (C) 2005-2017 Andes Technology Corporation +#ifndef __ASM_VDSO_DATAPAGE_H +#define __ASM_VDSO_DATAPAGE_H + +#ifdef __KERNEL__ + +#ifndef __ASSEMBLY__ + +struct vdso_data { + bool cycle_count_down; /* timer cyclye counter is decrease with time */ + u32 cycle_count_offset; /* offset of timer cycle counter register */ + u32 seq_count; /* sequence count - odd during updates */ + u32 xtime_coarse_sec; /* coarse time */ + u32 xtime_coarse_nsec; + + u32 wtm_clock_sec; /* wall to monotonic offset */ + u32 wtm_clock_nsec; + u32 xtime_clock_sec; /* CLOCK_REALTIME - seconds */ + u32 cs_mult; /* clocksource multiplier */ + u32 cs_shift; /* Cycle to nanosecond divisor (power of two) */ + + u64 cs_cycle_last; /* last cycle value */ + u64 cs_mask; /* clocksource mask */ + + u64 xtime_clock_nsec; /* CLOCK_REALTIME sub-ns base */ + u32 tz_minuteswest; /* timezone info for gettimeofday(2) */ + u32 tz_dsttime; +}; + +#endif /* !__ASSEMBLY__ */ + +#endif /* __KERNEL__ */ + +#endif /* __ASM_VDSO_DATAPAGE_H */ diff --git a/arch/nds32/include/asm/vdso_timer_info.h b/arch/nds32/include/asm/vdso_timer_info.h new file mode 100644 index 000000000..50ba117cf --- /dev/null +++ b/arch/nds32/include/asm/vdso_timer_info.h @@ -0,0 +1,14 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +extern struct timer_info_t timer_info; +#define EMPTY_VALUE ~(0UL) +#define EMPTY_TIMER_MAPPING EMPTY_VALUE +#define EMPTY_REG_OFFSET EMPTY_VALUE + +struct timer_info_t +{ + bool cycle_count_down; + unsigned long mapping_base; + unsigned long cycle_count_reg_offset; +}; diff --git a/arch/nds32/include/uapi/asm/Kbuild b/arch/nds32/include/uapi/asm/Kbuild new file mode 100644 index 000000000..40be972fa --- /dev/null +++ b/arch/nds32/include/uapi/asm/Kbuild @@ -0,0 +1,29 @@ +# UAPI Header export list +include include/uapi/asm-generic/Kbuild.asm + +generic-y += bpf_perf_event.h +generic-y += errno.h +generic-y += ioctl.h +generic-y += ioctls.h +generic-y += ipcbuf.h +generic-y += shmbuf.h +generic-y += bitsperlong.h +generic-y += fcntl.h +generic-y += stat.h +generic-y += mman.h +generic-y += msgbuf.h +generic-y += poll.h +generic-y += posix_types.h +generic-y += resource.h +generic-y += sembuf.h +generic-y += setup.h +generic-y += siginfo.h +generic-y += signal.h +generic-y += socket.h +generic-y += sockios.h +generic-y += swab.h +generic-y += statfs.h +generic-y += termbits.h +generic-y += termios.h +generic-y += types.h +generic-y += ucontext.h diff --git a/arch/nds32/include/uapi/asm/auxvec.h b/arch/nds32/include/uapi/asm/auxvec.h new file mode 100644 index 000000000..56043ce49 --- /dev/null +++ b/arch/nds32/include/uapi/asm/auxvec.h @@ -0,0 +1,12 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#ifndef __ASM_AUXVEC_H +#define __ASM_AUXVEC_H + +/* VDSO location */ +#define AT_SYSINFO_EHDR 33 + +#define AT_VECTOR_SIZE_ARCH 1 + +#endif diff --git a/arch/nds32/include/uapi/asm/byteorder.h b/arch/nds32/include/uapi/asm/byteorder.h new file mode 100644 index 000000000..a23f6f3a2 --- /dev/null +++ b/arch/nds32/include/uapi/asm/byteorder.h @@ -0,0 +1,13 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#ifndef __NDS32_BYTEORDER_H__ +#define __NDS32_BYTEORDER_H__ + +#ifdef __NDS32_EB__ +#include <linux/byteorder/big_endian.h> +#else +#include <linux/byteorder/little_endian.h> +#endif + +#endif /* __NDS32_BYTEORDER_H__ */ diff --git a/arch/nds32/include/uapi/asm/cachectl.h b/arch/nds32/include/uapi/asm/cachectl.h new file mode 100644 index 000000000..4cdca9b23 --- /dev/null +++ b/arch/nds32/include/uapi/asm/cachectl.h @@ -0,0 +1,14 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 1994, 1995, 1996 by Ralf Baechle +// Copyright (C) 2005-2017 Andes Technology Corporation +#ifndef _ASM_CACHECTL +#define _ASM_CACHECTL + +/* + * Options for cacheflush system call + */ +#define ICACHE 0 /* flush instruction cache */ +#define DCACHE 1 /* writeback and flush data cache */ +#define BCACHE 2 /* flush instruction cache + writeback and flush data cache */ + +#endif /* _ASM_CACHECTL */ diff --git a/arch/nds32/include/uapi/asm/param.h b/arch/nds32/include/uapi/asm/param.h new file mode 100644 index 000000000..e3fb723ee --- /dev/null +++ b/arch/nds32/include/uapi/asm/param.h @@ -0,0 +1,11 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#ifndef __ASM_NDS32_PARAM_H +#define __ASM_NDS32_PARAM_H + +#define EXEC_PAGESIZE 8192 + +#include <asm-generic/param.h> + +#endif /* __ASM_NDS32_PARAM_H */ diff --git a/arch/nds32/include/uapi/asm/ptrace.h b/arch/nds32/include/uapi/asm/ptrace.h new file mode 100644 index 000000000..358c99e39 --- /dev/null +++ b/arch/nds32/include/uapi/asm/ptrace.h @@ -0,0 +1,25 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#ifndef __UAPI_ASM_NDS32_PTRACE_H +#define __UAPI_ASM_NDS32_PTRACE_H + +#ifndef __ASSEMBLY__ + +/* + * User structures for general purpose register. + */ +struct user_pt_regs { + long uregs[26]; + long fp; + long gp; + long lp; + long sp; + long ipc; + long lb; + long le; + long lc; + long syscallno; +}; +#endif +#endif diff --git a/arch/nds32/include/uapi/asm/sigcontext.h b/arch/nds32/include/uapi/asm/sigcontext.h new file mode 100644 index 000000000..00567b237 --- /dev/null +++ b/arch/nds32/include/uapi/asm/sigcontext.h @@ -0,0 +1,60 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#ifndef _ASMNDS32_SIGCONTEXT_H +#define _ASMNDS32_SIGCONTEXT_H + +/* + * Signal context structure - contains all info to do with the state + * before the signal handler was invoked. Note: only add new entries + * to the end of the structure. + */ + +struct zol_struct { + unsigned long nds32_lc; /* $LC */ + unsigned long nds32_le; /* $LE */ + unsigned long nds32_lb; /* $LB */ +}; + +struct sigcontext { + unsigned long trap_no; + unsigned long error_code; + unsigned long oldmask; + unsigned long nds32_r0; + unsigned long nds32_r1; + unsigned long nds32_r2; + unsigned long nds32_r3; + unsigned long nds32_r4; + unsigned long nds32_r5; + unsigned long nds32_r6; + unsigned long nds32_r7; + unsigned long nds32_r8; + unsigned long nds32_r9; + unsigned long nds32_r10; + unsigned long nds32_r11; + unsigned long nds32_r12; + unsigned long nds32_r13; + unsigned long nds32_r14; + unsigned long nds32_r15; + unsigned long nds32_r16; + unsigned long nds32_r17; + unsigned long nds32_r18; + unsigned long nds32_r19; + unsigned long nds32_r20; + unsigned long nds32_r21; + unsigned long nds32_r22; + unsigned long nds32_r23; + unsigned long nds32_r24; + unsigned long nds32_r25; + unsigned long nds32_fp; /* $r28 */ + unsigned long nds32_gp; /* $r29 */ + unsigned long nds32_lp; /* $r30 */ + unsigned long nds32_sp; /* $r31 */ + unsigned long nds32_ipc; + unsigned long fault_address; + unsigned long used_math_flag; + /* FPU Registers */ + struct zol_struct zol; +}; + +#endif diff --git a/arch/nds32/include/uapi/asm/unistd.h b/arch/nds32/include/uapi/asm/unistd.h new file mode 100644 index 000000000..6e95901ca --- /dev/null +++ b/arch/nds32/include/uapi/asm/unistd.h @@ -0,0 +1,11 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#define __ARCH_WANT_SYNC_FILE_RANGE2 + +/* Use the standard ABI for syscalls */ +#include <asm-generic/unistd.h> + +/* Additional NDS32 specific syscalls. */ +#define __NR_cacheflush (__NR_arch_specific_syscall) +__SYSCALL(__NR_cacheflush, sys_cacheflush) diff --git a/arch/nds32/kernel/Makefile b/arch/nds32/kernel/Makefile new file mode 100644 index 000000000..27cded39f --- /dev/null +++ b/arch/nds32/kernel/Makefile @@ -0,0 +1,29 @@ +# +# Makefile for the linux kernel. +# + +CPPFLAGS_vmlinux.lds := -DTEXTADDR=$(TEXTADDR) +AFLAGS_head.o := -DTEXTADDR=$(TEXTADDR) + +# Object file lists. + +obj-y := ex-entry.o ex-exit.o ex-scall.o irq.o \ + process.o ptrace.o setup.o signal.o \ + sys_nds32.o time.o traps.o cacheinfo.o \ + dma.o syscall_table.o vdso.o + +obj-$(CONFIG_MODULES) += nds32_ksyms.o module.o +obj-$(CONFIG_STACKTRACE) += stacktrace.o +obj-$(CONFIG_OF) += devtree.o +obj-$(CONFIG_CACHE_L2) += atl2c.o + +extra-y := head.o vmlinux.lds + + +obj-y += vdso/ + +obj-$(CONFIG_FUNCTION_TRACER) += ftrace.o + +ifdef CONFIG_FUNCTION_TRACER +CFLAGS_REMOVE_ftrace.o = $(CC_FLAGS_FTRACE) +endif diff --git a/arch/nds32/kernel/asm-offsets.c b/arch/nds32/kernel/asm-offsets.c new file mode 100644 index 000000000..3541d5981 --- /dev/null +++ b/arch/nds32/kernel/asm-offsets.c @@ -0,0 +1,28 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#include <linux/sched.h> +#include <linux/sched/task_stack.h> +#include <linux/kbuild.h> +#include <asm/thread_info.h> +#include <asm/ptrace.h> + +int main(void) +{ + DEFINE(TSK_TI_FLAGS, offsetof(struct task_struct, thread_info.flags)); + DEFINE(TSK_TI_PREEMPT, + offsetof(struct task_struct, thread_info.preempt_count)); + DEFINE(THREAD_CPU_CONTEXT, + offsetof(struct task_struct, thread.cpu_context)); + DEFINE(OSP_OFFSET, offsetof(struct pt_regs, osp)); + DEFINE(SP_OFFSET, offsetof(struct pt_regs, sp)); + DEFINE(FUCOP_CTL_OFFSET, offsetof(struct pt_regs, fucop_ctl)); + DEFINE(IPSW_OFFSET, offsetof(struct pt_regs, ipsw)); + DEFINE(SYSCALLNO_OFFSET, offsetof(struct pt_regs, syscallno)); + DEFINE(IPC_OFFSET, offsetof(struct pt_regs, ipc)); + DEFINE(R0_OFFSET, offsetof(struct pt_regs, uregs[0])); + DEFINE(R15_OFFSET, offsetof(struct pt_regs, uregs[15])); + DEFINE(CLOCK_REALTIME_RES, MONOTONIC_RES_NSEC); + DEFINE(CLOCK_COARSE_RES, LOW_RES_NSEC); + return 0; +} diff --git a/arch/nds32/kernel/atl2c.c b/arch/nds32/kernel/atl2c.c new file mode 100644 index 000000000..0c5386e72 --- /dev/null +++ b/arch/nds32/kernel/atl2c.c @@ -0,0 +1,65 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#include <linux/compiler.h> +#include <linux/of_address.h> +#include <linux/of_fdt.h> +#include <linux/of_platform.h> +#include <asm/l2_cache.h> + +void __iomem *atl2c_base; +static const struct of_device_id atl2c_ids[] __initconst = { + {.compatible = "andestech,atl2c",}, + {} +}; + +static int __init atl2c_of_init(void) +{ + struct device_node *np; + struct resource res; + unsigned long tmp = 0; + unsigned long l2set, l2way, l2clsz; + + if (!(__nds32__mfsr(NDS32_SR_MSC_CFG) & MSC_CFG_mskL2C)) + return -ENODEV; + + np = of_find_matching_node(NULL, atl2c_ids); + if (!np) + return -ENODEV; + + if (of_address_to_resource(np, 0, &res)) + return -ENODEV; + + atl2c_base = ioremap(res.start, resource_size(&res)); + if (!atl2c_base) + return -ENOMEM; + + l2set = + 64 << ((L2C_R_REG(L2_CA_CONF_OFF) & L2_CA_CONF_mskL2SET) >> + L2_CA_CONF_offL2SET); + l2way = + 1 + + ((L2C_R_REG(L2_CA_CONF_OFF) & L2_CA_CONF_mskL2WAY) >> + L2_CA_CONF_offL2WAY); + l2clsz = + 4 << ((L2C_R_REG(L2_CA_CONF_OFF) & L2_CA_CONF_mskL2CLSZ) >> + L2_CA_CONF_offL2CLSZ); + pr_info("L2:%luKB/%luS/%luW/%luB\n", + l2set * l2way * l2clsz / 1024, l2set, l2way, l2clsz); + + tmp = L2C_R_REG(L2CC_PROT_OFF); + tmp &= ~L2CC_PROT_mskMRWEN; + L2C_W_REG(L2CC_PROT_OFF, tmp); + + tmp = L2C_R_REG(L2CC_SETUP_OFF); + tmp &= ~L2CC_SETUP_mskPART; + L2C_W_REG(L2CC_SETUP_OFF, tmp); + + tmp = L2C_R_REG(L2CC_CTRL_OFF); + tmp |= L2CC_CTRL_mskEN; + L2C_W_REG(L2CC_CTRL_OFF, tmp); + + return 0; +} + +subsys_initcall(atl2c_of_init); diff --git a/arch/nds32/kernel/cacheinfo.c b/arch/nds32/kernel/cacheinfo.c new file mode 100644 index 000000000..0a7bc696d --- /dev/null +++ b/arch/nds32/kernel/cacheinfo.c @@ -0,0 +1,49 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#include <linux/bitops.h> +#include <linux/cacheinfo.h> +#include <linux/cpu.h> + +static void ci_leaf_init(struct cacheinfo *this_leaf, + enum cache_type type, unsigned int level) +{ + char cache_type = (type & CACHE_TYPE_INST ? ICACHE : DCACHE); + + this_leaf->level = level; + this_leaf->type = type; + this_leaf->coherency_line_size = CACHE_LINE_SIZE(cache_type); + this_leaf->number_of_sets = CACHE_SET(cache_type);; + this_leaf->ways_of_associativity = CACHE_WAY(cache_type); + this_leaf->size = this_leaf->number_of_sets * + this_leaf->coherency_line_size * this_leaf->ways_of_associativity; +#if defined(CONFIG_CPU_DCACHE_WRITETHROUGH) + this_leaf->attributes = CACHE_WRITE_THROUGH; +#else + this_leaf->attributes = CACHE_WRITE_BACK; +#endif +} + +int init_cache_level(unsigned int cpu) +{ + struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu); + + /* Only 1 level and I/D cache seperate. */ + this_cpu_ci->num_levels = 1; + this_cpu_ci->num_leaves = 2; + return 0; +} + +int populate_cache_leaves(unsigned int cpu) +{ + unsigned int level, idx; + struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu); + struct cacheinfo *this_leaf = this_cpu_ci->info_list; + + for (idx = 0, level = 1; level <= this_cpu_ci->num_levels && + idx < this_cpu_ci->num_leaves; idx++, level++) { + ci_leaf_init(this_leaf++, CACHE_TYPE_DATA, level); + ci_leaf_init(this_leaf++, CACHE_TYPE_INST, level); + } + return 0; +} diff --git a/arch/nds32/kernel/devtree.c b/arch/nds32/kernel/devtree.c new file mode 100644 index 000000000..bdce0fe5a --- /dev/null +++ b/arch/nds32/kernel/devtree.c @@ -0,0 +1,19 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#include <linux/bug.h> +#include <linux/printk.h> +#include <linux/of_fdt.h> + +void __init early_init_devtree(void *params) +{ + if (!params || !early_init_dt_scan(params)) { + pr_crit("\n" + "Error: invalid device tree blob at (virtual address 0x%p)\n" + "\nPlease check your bootloader.", params); + + BUG_ON(1); + } + + dump_stack_set_arch_desc("%s (DT)", of_flat_dt_get_machine_name()); +} diff --git a/arch/nds32/kernel/dma.c b/arch/nds32/kernel/dma.c new file mode 100644 index 000000000..d0dbd4fe9 --- /dev/null +++ b/arch/nds32/kernel/dma.c @@ -0,0 +1,391 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#include <linux/types.h> +#include <linux/mm.h> +#include <linux/string.h> +#include <linux/dma-noncoherent.h> +#include <linux/io.h> +#include <linux/cache.h> +#include <linux/highmem.h> +#include <linux/slab.h> +#include <asm/cacheflush.h> +#include <asm/tlbflush.h> +#include <asm/proc-fns.h> + +/* + * This is the page table (2MB) covering uncached, DMA consistent allocations + */ +static pte_t *consistent_pte; +static DEFINE_RAW_SPINLOCK(consistent_lock); + +/* + * VM region handling support. + * + * This should become something generic, handling VM region allocations for + * vmalloc and similar (ioremap, module space, etc). + * + * I envisage vmalloc()'s supporting vm_struct becoming: + * + * struct vm_struct { + * struct vm_region region; + * unsigned long flags; + * struct page **pages; + * unsigned int nr_pages; + * unsigned long phys_addr; + * }; + * + * get_vm_area() would then call vm_region_alloc with an appropriate + * struct vm_region head (eg): + * + * struct vm_region vmalloc_head = { + * .vm_list = LIST_HEAD_INIT(vmalloc_head.vm_list), + * .vm_start = VMALLOC_START, + * .vm_end = VMALLOC_END, + * }; + * + * However, vmalloc_head.vm_start is variable (typically, it is dependent on + * the amount of RAM found at boot time.) I would imagine that get_vm_area() + * would have to initialise this each time prior to calling vm_region_alloc(). + */ +struct arch_vm_region { + struct list_head vm_list; + unsigned long vm_start; + unsigned long vm_end; + struct page *vm_pages; +}; + +static struct arch_vm_region consistent_head = { + .vm_list = LIST_HEAD_INIT(consistent_head.vm_list), + .vm_start = CONSISTENT_BASE, + .vm_end = CONSISTENT_END, +}; + +static struct arch_vm_region *vm_region_alloc(struct arch_vm_region *head, + size_t size, int gfp) +{ + unsigned long addr = head->vm_start, end = head->vm_end - size; + unsigned long flags; + struct arch_vm_region *c, *new; + + new = kmalloc(sizeof(struct arch_vm_region), gfp); + if (!new) + goto out; + + raw_spin_lock_irqsave(&consistent_lock, flags); + + list_for_each_entry(c, &head->vm_list, vm_list) { + if ((addr + size) < addr) + goto nospc; + if ((addr + size) <= c->vm_start) + goto found; + addr = c->vm_end; + if (addr > end) + goto nospc; + } + +found: + /* + * Insert this entry _before_ the one we found. + */ + list_add_tail(&new->vm_list, &c->vm_list); + new->vm_start = addr; + new->vm_end = addr + size; + + raw_spin_unlock_irqrestore(&consistent_lock, flags); + return new; + +nospc: + raw_spin_unlock_irqrestore(&consistent_lock, flags); + kfree(new); +out: + return NULL; +} + +static struct arch_vm_region *vm_region_find(struct arch_vm_region *head, + unsigned long addr) +{ + struct arch_vm_region *c; + + list_for_each_entry(c, &head->vm_list, vm_list) { + if (c->vm_start == addr) + goto out; + } + c = NULL; +out: + return c; +} + +void *arch_dma_alloc(struct device *dev, size_t size, dma_addr_t *handle, + gfp_t gfp, unsigned long attrs) +{ + struct page *page; + struct arch_vm_region *c; + unsigned long order; + u64 mask = ~0ULL, limit; + pgprot_t prot = pgprot_noncached(PAGE_KERNEL); + + if (!consistent_pte) { + pr_err("%s: not initialized\n", __func__); + dump_stack(); + return NULL; + } + + if (dev) { + mask = dev->coherent_dma_mask; + + /* + * Sanity check the DMA mask - it must be non-zero, and + * must be able to be satisfied by a DMA allocation. + */ + if (mask == 0) { + dev_warn(dev, "coherent DMA mask is unset\n"); + goto no_page; + } + + } + + /* + * Sanity check the allocation size. + */ + size = PAGE_ALIGN(size); + limit = (mask + 1) & ~mask; + if ((limit && size >= limit) || + size >= (CONSISTENT_END - CONSISTENT_BASE)) { + pr_warn("coherent allocation too big " + "(requested %#x mask %#llx)\n", size, mask); + goto no_page; + } + + order = get_order(size); + + if (mask != 0xffffffff) + gfp |= GFP_DMA; + + page = alloc_pages(gfp, order); + if (!page) + goto no_page; + + /* + * Invalidate any data that might be lurking in the + * kernel direct-mapped region for device DMA. + */ + { + unsigned long kaddr = (unsigned long)page_address(page); + memset(page_address(page), 0, size); + cpu_dma_wbinval_range(kaddr, kaddr + size); + } + + /* + * Allocate a virtual address in the consistent mapping region. + */ + c = vm_region_alloc(&consistent_head, size, + gfp & ~(__GFP_DMA | __GFP_HIGHMEM)); + if (c) { + pte_t *pte = consistent_pte + CONSISTENT_OFFSET(c->vm_start); + struct page *end = page + (1 << order); + + c->vm_pages = page; + + /* + * Set the "dma handle" + */ + *handle = page_to_phys(page); + + do { + BUG_ON(!pte_none(*pte)); + + /* + * x86 does not mark the pages reserved... + */ + SetPageReserved(page); + set_pte(pte, mk_pte(page, prot)); + page++; + pte++; + } while (size -= PAGE_SIZE); + + /* + * Free the otherwise unused pages. + */ + while (page < end) { + __free_page(page); + page++; + } + + return (void *)c->vm_start; + } + + if (page) + __free_pages(page, order); +no_page: + *handle = ~0; + return NULL; +} + +void arch_dma_free(struct device *dev, size_t size, void *cpu_addr, + dma_addr_t handle, unsigned long attrs) +{ + struct arch_vm_region *c; + unsigned long flags, addr; + pte_t *ptep; + + size = PAGE_ALIGN(size); + + raw_spin_lock_irqsave(&consistent_lock, flags); + + c = vm_region_find(&consistent_head, (unsigned long)cpu_addr); + if (!c) + goto no_area; + + if ((c->vm_end - c->vm_start) != size) { + pr_err("%s: freeing wrong coherent size (%ld != %d)\n", + __func__, c->vm_end - c->vm_start, size); + dump_stack(); + size = c->vm_end - c->vm_start; + } + + ptep = consistent_pte + CONSISTENT_OFFSET(c->vm_start); + addr = c->vm_start; + do { + pte_t pte = ptep_get_and_clear(&init_mm, addr, ptep); + unsigned long pfn; + + ptep++; + addr += PAGE_SIZE; + + if (!pte_none(pte) && pte_present(pte)) { + pfn = pte_pfn(pte); + + if (pfn_valid(pfn)) { + struct page *page = pfn_to_page(pfn); + + /* + * x86 does not mark the pages reserved... + */ + ClearPageReserved(page); + + __free_page(page); + continue; + } + } + + pr_crit("%s: bad page in kernel page table\n", __func__); + } while (size -= PAGE_SIZE); + + flush_tlb_kernel_range(c->vm_start, c->vm_end); + + list_del(&c->vm_list); + + raw_spin_unlock_irqrestore(&consistent_lock, flags); + + kfree(c); + return; + +no_area: + raw_spin_unlock_irqrestore(&consistent_lock, flags); + pr_err("%s: trying to free invalid coherent area: %p\n", + __func__, cpu_addr); + dump_stack(); +} + +/* + * Initialise the consistent memory allocation. + */ +static int __init consistent_init(void) +{ + pgd_t *pgd; + pmd_t *pmd; + pte_t *pte; + int ret = 0; + + do { + pgd = pgd_offset(&init_mm, CONSISTENT_BASE); + pmd = pmd_alloc(&init_mm, pgd, CONSISTENT_BASE); + if (!pmd) { + pr_err("%s: no pmd tables\n", __func__); + ret = -ENOMEM; + break; + } + /* The first level mapping may be created in somewhere. + * It's not necessary to warn here. */ + /* WARN_ON(!pmd_none(*pmd)); */ + + pte = pte_alloc_kernel(pmd, CONSISTENT_BASE); + if (!pte) { + ret = -ENOMEM; + break; + } + + consistent_pte = pte; + } while (0); + + return ret; +} + +core_initcall(consistent_init); + +static inline void cache_op(phys_addr_t paddr, size_t size, + void (*fn)(unsigned long start, unsigned long end)) +{ + struct page *page = pfn_to_page(paddr >> PAGE_SHIFT); + unsigned offset = paddr & ~PAGE_MASK; + size_t left = size; + unsigned long start; + + do { + size_t len = left; + + if (PageHighMem(page)) { + void *addr; + + if (offset + len > PAGE_SIZE) { + if (offset >= PAGE_SIZE) { + page += offset >> PAGE_SHIFT; + offset &= ~PAGE_MASK; + } + len = PAGE_SIZE - offset; + } + + addr = kmap_atomic(page); + start = (unsigned long)(addr + offset); + fn(start, start + len); + kunmap_atomic(addr); + } else { + start = (unsigned long)phys_to_virt(paddr); + fn(start, start + size); + } + offset = 0; + page++; + left -= len; + } while (left); +} + +void arch_sync_dma_for_device(struct device *dev, phys_addr_t paddr, + size_t size, enum dma_data_direction dir) +{ + switch (dir) { + case DMA_FROM_DEVICE: + break; + case DMA_TO_DEVICE: + case DMA_BIDIRECTIONAL: + cache_op(paddr, size, cpu_dma_wb_range); + break; + default: + BUG(); + } +} + +void arch_sync_dma_for_cpu(struct device *dev, phys_addr_t paddr, + size_t size, enum dma_data_direction dir) +{ + switch (dir) { + case DMA_TO_DEVICE: + break; + case DMA_FROM_DEVICE: + case DMA_BIDIRECTIONAL: + cache_op(paddr, size, cpu_dma_inval_range); + break; + default: + BUG(); + } +} diff --git a/arch/nds32/kernel/ex-entry.S b/arch/nds32/kernel/ex-entry.S new file mode 100644 index 000000000..21a144071 --- /dev/null +++ b/arch/nds32/kernel/ex-entry.S @@ -0,0 +1,157 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#include <linux/linkage.h> +#include <asm/memory.h> +#include <asm/nds32.h> +#include <asm/errno.h> +#include <asm/asm-offsets.h> +#include <asm/page.h> + +#ifdef CONFIG_HWZOL + .macro push_zol + mfusr $r14, $LB + mfusr $r15, $LE + mfusr $r16, $LC + .endm +#endif + + .macro save_user_regs + + smw.adm $sp, [$sp], $sp, #0x1 + /* move $SP to the bottom of pt_regs */ + addi $sp, $sp, -OSP_OFFSET + + /* push $r0 ~ $r25 */ + smw.bim $r0, [$sp], $r25 + /* push $fp, $gp, $lp */ + smw.bim $sp, [$sp], $sp, #0xe + + mfsr $r12, $SP_USR + mfsr $r13, $IPC +#ifdef CONFIG_HWZOL + push_zol +#endif + movi $r17, -1 + move $r18, $r0 + mfsr $r19, $PSW + mfsr $r20, $IPSW + mfsr $r21, $P_IPSW + mfsr $r22, $P_IPC + mfsr $r23, $P_P0 + mfsr $r24, $P_P1 + smw.bim $r12, [$sp], $r24, #0 + addi $sp, $sp, -FUCOP_CTL_OFFSET + + /* Initialize kernel space $fp */ + andi $p0, $r20, #PSW_mskPOM + movi $p1, #0x0 + cmovz $fp, $p1, $p0 + + andi $r16, $r19, #PSW_mskINTL + slti $r17, $r16, #4 + bnez $r17, 1f + addi $r17, $r19, #-2 + mtsr $r17, $PSW + isb +1: + /* If it was superuser mode, we don't need to update $r25 */ + bnez $p0, 2f + la $p0, __entry_task + lw $r25, [$p0] +2: + .endm + + .text + +/* + * Exception Vector + */ +exception_handlers: + .long unhandled_exceptions !Reset/NMI + .long unhandled_exceptions !TLB fill + .long do_page_fault !PTE not present + .long do_dispatch_tlb_misc !TLB misc + .long unhandled_exceptions !TLB VLPT + .long unhandled_exceptions !Machine Error + .long do_debug_trap !Debug related + .long do_dispatch_general !General exception + .long eh_syscall !Syscall + .long asm_do_IRQ !IRQ + +common_exception_handler: + save_user_regs + mfsr $p0, $ITYPE + andi $p0, $p0, #ITYPE_mskVECTOR + srli $p0, $p0, #ITYPE_offVECTOR + andi $p1, $p0, #NDS32_VECTOR_mskNONEXCEPTION + bnez $p1, 1f + sethi $lp, hi20(ret_from_exception) + ori $lp, $lp, lo12(ret_from_exception) + sethi $p1, hi20(exception_handlers) + ori $p1, $p1, lo12(exception_handlers) + lw $p1, [$p1+$p0<<2] + move $r0, $p0 + mfsr $r1, $EVA + mfsr $r2, $ITYPE + move $r3, $sp + mfsr $r4, $OIPC + /* enable gie if it is enabled in IPSW. */ + mfsr $r21, $PSW + andi $r20, $r20, #PSW_mskGIE /* r20 is $IPSW*/ + or $r21, $r21, $r20 + mtsr $r21, $PSW + dsb + jr $p1 + + /* syscall */ +1: + addi $p1, $p0, #-NDS32_VECTOR_offEXCEPTION + bnez $p1, 2f + sethi $lp, hi20(ret_from_exception) + ori $lp, $lp, lo12(ret_from_exception) + sethi $p1, hi20(exception_handlers) + ori $p1, $p1, lo12(exception_handlers) + lwi $p1, [$p1+#NDS32_VECTOR_offEXCEPTION<<2] + jr $p1 + + /* interrupt */ +2: +#ifdef CONFIG_TRACE_IRQFLAGS + jal __trace_hardirqs_off +#endif + move $r0, $sp + sethi $lp, hi20(ret_from_intr) + ori $lp, $lp, lo12(ret_from_intr) + sethi $p0, hi20(exception_handlers) + ori $p0, $p0, lo12(exception_handlers) + lwi $p0, [$p0+#NDS32_VECTOR_offINTERRUPT<<2] + jr $p0 + + .macro EXCEPTION_VECTOR_DEBUG + .align 4 + mfsr $p0, $EDM_CTL + andi $p0, $p0, EDM_CTL_mskV3_EDM_MODE + tnez $p0, SWID_RAISE_INTERRUPT_LEVEL + .endm + + .macro EXCEPTION_VECTOR + .align 4 + sethi $p0, hi20(common_exception_handler) + ori $p0, $p0, lo12(common_exception_handler) + jral.ton $p0, $p0 + .endm + + .section ".text.init", #alloc, #execinstr + .global exception_vector +exception_vector: +.rept 6 + EXCEPTION_VECTOR +.endr + EXCEPTION_VECTOR_DEBUG +.rept 121 + EXCEPTION_VECTOR +.endr + .align 4 + .global exception_vector_end +exception_vector_end: diff --git a/arch/nds32/kernel/ex-exit.S b/arch/nds32/kernel/ex-exit.S new file mode 100644 index 000000000..f00af92f7 --- /dev/null +++ b/arch/nds32/kernel/ex-exit.S @@ -0,0 +1,184 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#include <linux/linkage.h> +#include <asm/unistd.h> +#include <asm/assembler.h> +#include <asm/nds32.h> +#include <asm/asm-offsets.h> +#include <asm/thread_info.h> +#include <asm/current.h> + + + +#ifdef CONFIG_HWZOL + .macro pop_zol + mtusr $r14, $LB + mtusr $r15, $LE + mtusr $r16, $LC + .endm +#endif + + .macro restore_user_regs_first + setgie.d + isb + + addi $sp, $sp, FUCOP_CTL_OFFSET + + lmw.adm $r12, [$sp], $r24, #0x0 + mtsr $r12, $SP_USR + mtsr $r13, $IPC +#ifdef CONFIG_HWZOL + pop_zol +#endif + mtsr $r19, $PSW + mtsr $r20, $IPSW + mtsr $r21, $P_IPSW + mtsr $r22, $P_IPC + mtsr $r23, $P_P0 + mtsr $r24, $P_P1 + lmw.adm $sp, [$sp], $sp, #0xe + .endm + + .macro restore_user_regs_last + pop $p0 + cmovn $sp, $p0, $p0 + + iret + nop + + .endm + + .macro restore_user_regs + restore_user_regs_first + lmw.adm $r0, [$sp], $r25, #0x0 + addi $sp, $sp, OSP_OFFSET + restore_user_regs_last + .endm + + .macro fast_restore_user_regs + restore_user_regs_first + lmw.adm $r1, [$sp], $r25, #0x0 + addi $sp, $sp, OSP_OFFSET-4 + restore_user_regs_last + .endm + +#ifdef CONFIG_PREEMPT + .macro preempt_stop + .endm +#else + .macro preempt_stop + setgie.d + isb + .endm +#define resume_kernel no_work_pending +#endif + +ENTRY(ret_from_exception) + preempt_stop +ENTRY(ret_from_intr) + +/* + * judge Kernel or user mode + * + */ + lwi $p0, [$sp+(#IPSW_OFFSET)] ! Check if in nested interrupt + andi $p0, $p0, #PSW_mskINTL + bnez $p0, resume_kernel ! done with iret + j resume_userspace + + +/* + * This is the fast syscall return path. We do as little as + * possible here, and this includes saving $r0 back into the SVC + * stack. + * fixed: tsk - $r25, syscall # - $r7, syscall table pointer - $r8 + */ +ENTRY(ret_fast_syscall) + gie_disable + lwi $r1, [tsk+#TSK_TI_FLAGS] + andi $p1, $r1, #_TIF_WORK_MASK + bnez $p1, fast_work_pending + fast_restore_user_regs ! iret + +/* + * Ok, we need to do extra processing, + * enter the slow path returning from syscall, while pending work. + */ +fast_work_pending: + swi $r0, [$sp+(#R0_OFFSET)] ! what is different from ret_from_exception +work_pending: + andi $p1, $r1, #_TIF_NEED_RESCHED + bnez $p1, work_resched + + andi $p1, $r1, #_TIF_SIGPENDING|#_TIF_NOTIFY_RESUME + beqz $p1, no_work_pending + + move $r0, $sp ! 'regs' + gie_enable + bal do_notify_resume + b ret_slow_syscall +work_resched: + bal schedule ! path, return to user mode + +/* + * "slow" syscall return path. + */ +ENTRY(resume_userspace) +ENTRY(ret_slow_syscall) + gie_disable + lwi $p0, [$sp+(#IPSW_OFFSET)] ! Check if in nested interrupt + andi $p0, $p0, #PSW_mskINTL + bnez $p0, no_work_pending ! done with iret + lwi $r1, [tsk+#TSK_TI_FLAGS] + andi $p1, $r1, #_TIF_WORK_MASK + bnez $p1, work_pending ! handle work_resched, sig_pend + +no_work_pending: +#ifdef CONFIG_TRACE_IRQFLAGS + lwi $p0, [$sp+(#IPSW_OFFSET)] + andi $p0, $p0, #0x1 + la $r10, __trace_hardirqs_off + la $r9, __trace_hardirqs_on + cmovz $r9, $p0, $r10 + jral $r9 +#endif + restore_user_regs ! return from iret + + +/* + * preemptive kernel + */ +#ifdef CONFIG_PREEMPT +resume_kernel: + gie_disable + lwi $t0, [tsk+#TSK_TI_PREEMPT] + bnez $t0, no_work_pending +need_resched: + lwi $t0, [tsk+#TSK_TI_FLAGS] + andi $p1, $t0, #_TIF_NEED_RESCHED + beqz $p1, no_work_pending + + lwi $t0, [$sp+(#IPSW_OFFSET)] ! Interrupts off? + andi $t0, $t0, #1 + beqz $t0, no_work_pending + + jal preempt_schedule_irq + b need_resched +#endif + +/* + * This is how we return from a fork. + */ +ENTRY(ret_from_fork) + bal schedule_tail + beqz $r6, 1f ! r6 stores fn for kernel thread + move $r0, $r7 ! prepare kernel thread arg + jral $r6 +1: + lwi $r1, [tsk+#TSK_TI_FLAGS] ! check for syscall tracing + andi $p1, $r1, #_TIF_WORK_SYSCALL_LEAVE ! are we tracing syscalls? + beqz $p1, ret_slow_syscall + move $r0, $sp + bal syscall_trace_leave + b ret_slow_syscall diff --git a/arch/nds32/kernel/ex-scall.S b/arch/nds32/kernel/ex-scall.S new file mode 100644 index 000000000..36aa87ecd --- /dev/null +++ b/arch/nds32/kernel/ex-scall.S @@ -0,0 +1,98 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#include <linux/linkage.h> +#include <asm/unistd.h> +#include <asm/assembler.h> +#include <asm/nds32.h> +#include <asm/asm-offsets.h> +#include <asm/thread_info.h> +#include <asm/current.h> + +/* + * $r0 = previous task_struct, + * $r1 = next task_struct, + * previous and next are guaranteed not to be the same. + */ + +ENTRY(__switch_to) + + la $p0, __entry_task + sw $r1, [$p0] + move $p1, $r0 + addi $p1, $p1, #THREAD_CPU_CONTEXT + smw.bi $r6, [$p1], $r14, #0xb ! push r6~r14, fp, lp, sp + move $r25, $r1 + addi $r1, $r1, #THREAD_CPU_CONTEXT + lmw.bi $r6, [$r1], $r14, #0xb ! pop r6~r14, fp, lp, sp + ret + + +#define tbl $r8 + +/* + * $r7 will be writen as syscall nr + */ + .macro get_scno + lwi $r7, [$sp + R15_OFFSET] + swi $r7, [$sp + SYSCALLNO_OFFSET] + .endm + + .macro updateipc + addi $r17, $r13, #4 ! $r13 is $IPC + swi $r17, [$sp + IPC_OFFSET] + .endm + +ENTRY(eh_syscall) + updateipc + + get_scno + gie_enable + + lwi $p0, [tsk+#TSK_TI_FLAGS] ! check for syscall tracing + + andi $p1, $p0, #_TIF_WORK_SYSCALL_ENTRY ! are we tracing syscalls? + bnez $p1, __sys_trace + + la $lp, ret_fast_syscall ! return address +jmp_systbl: + addi $p1, $r7, #-__NR_syscalls ! syscall number of syscall instruction is guarded by addembler + bgez $p1, _SCNO_EXCEED ! call sys_* routine + la tbl, sys_call_table ! load syscall table pointer + slli $p1, $r7, #2 + add $p1, tbl, $p1 + lwi $p1, [$p1] + jr $p1 ! no return + +_SCNO_EXCEED: + ori $r0, $r7, #0 + ori $r1, $sp, #0 + b bad_syscall + +/* + * This is the really slow path. We're going to be doing + * context switches, and waiting for our parent to respond. + */ +__sys_trace: + move $r0, $sp + bal syscall_trace_enter + move $r7, $r0 + la $lp, __sys_trace_return ! return address + + addi $p1, $r7, #1 + beqz $p1, ret_slow_syscall ! fatal signal is pending + + addi $p1, $sp, #R0_OFFSET ! pointer to regs + lmw.bi $r0, [$p1], $r5 ! have to reload $r0 - $r5 + b jmp_systbl + +__sys_trace_return: + swi $r0, [$sp+#R0_OFFSET] ! T: save returned $r0 + move $r0, $sp ! set pt_regs for syscall_trace_leave + bal syscall_trace_leave + b ret_slow_syscall + +ENTRY(sys_rt_sigreturn_wrapper) + addi $r0, $sp, #0 + b sys_rt_sigreturn +ENDPROC(sys_rt_sigreturn_wrapper) diff --git a/arch/nds32/kernel/ftrace.c b/arch/nds32/kernel/ftrace.c new file mode 100644 index 000000000..8a4137255 --- /dev/null +++ b/arch/nds32/kernel/ftrace.c @@ -0,0 +1,295 @@ +// SPDX-License-Identifier: GPL-2.0 + +#include <linux/ftrace.h> +#include <linux/uaccess.h> +#include <asm/cacheflush.h> + +#ifndef CONFIG_DYNAMIC_FTRACE +extern void (*ftrace_trace_function)(unsigned long, unsigned long, + struct ftrace_ops*, struct pt_regs*); +extern int ftrace_graph_entry_stub(struct ftrace_graph_ent *trace); +extern void ftrace_graph_caller(void); + +noinline void __naked ftrace_stub(unsigned long ip, unsigned long parent_ip, + struct ftrace_ops *op, struct pt_regs *regs) +{ + __asm__ (""); /* avoid to optimize as pure function */ +} + +noinline void _mcount(unsigned long parent_ip) +{ + /* save all state by the compiler prologue */ + + unsigned long ip = (unsigned long)__builtin_return_address(0); + + if (ftrace_trace_function != ftrace_stub) + ftrace_trace_function(ip - MCOUNT_INSN_SIZE, parent_ip, + NULL, NULL); + +#ifdef CONFIG_FUNCTION_GRAPH_TRACER + if (ftrace_graph_return != (trace_func_graph_ret_t)ftrace_stub + || ftrace_graph_entry != ftrace_graph_entry_stub) + ftrace_graph_caller(); +#endif + + /* restore all state by the compiler epilogue */ +} +EXPORT_SYMBOL(_mcount); + +#else /* CONFIG_DYNAMIC_FTRACE */ + +noinline void __naked ftrace_stub(unsigned long ip, unsigned long parent_ip, + struct ftrace_ops *op, struct pt_regs *regs) +{ + __asm__ (""); /* avoid to optimize as pure function */ +} + +noinline void __naked _mcount(unsigned long parent_ip) +{ + __asm__ (""); /* avoid to optimize as pure function */ +} +EXPORT_SYMBOL(_mcount); + +#define XSTR(s) STR(s) +#define STR(s) #s +void _ftrace_caller(unsigned long parent_ip) +{ + /* save all state needed by the compiler prologue */ + + /* + * prepare arguments for real tracing function + * first arg : __builtin_return_address(0) - MCOUNT_INSN_SIZE + * second arg : parent_ip + */ + __asm__ __volatile__ ( + "move $r1, %0 \n\t" + "addi $r0, %1, #-" XSTR(MCOUNT_INSN_SIZE) "\n\t" + : + : "r" (parent_ip), "r" (__builtin_return_address(0))); + + /* a placeholder for the call to a real tracing function */ + __asm__ __volatile__ ( + "ftrace_call: \n\t" + "nop \n\t" + "nop \n\t" + "nop \n\t"); + +#ifdef CONFIG_FUNCTION_GRAPH_TRACER + /* a placeholder for the call to ftrace_graph_caller */ + __asm__ __volatile__ ( + "ftrace_graph_call: \n\t" + "nop \n\t" + "nop \n\t" + "nop \n\t"); +#endif + /* restore all state needed by the compiler epilogue */ +} + +int __init ftrace_dyn_arch_init(void) +{ + return 0; +} + +int ftrace_arch_code_modify_prepare(void) +{ + set_all_modules_text_rw(); + return 0; +} + +int ftrace_arch_code_modify_post_process(void) +{ + set_all_modules_text_ro(); + return 0; +} + +static unsigned long gen_sethi_insn(unsigned long addr) +{ + unsigned long opcode = 0x46000000; + unsigned long imm = addr >> 12; + unsigned long rt_num = 0xf << 20; + + return ENDIAN_CONVERT(opcode | rt_num | imm); +} + +static unsigned long gen_ori_insn(unsigned long addr) +{ + unsigned long opcode = 0x58000000; + unsigned long imm = addr & 0x0000fff; + unsigned long rt_num = 0xf << 20; + unsigned long ra_num = 0xf << 15; + + return ENDIAN_CONVERT(opcode | rt_num | ra_num | imm); +} + +static unsigned long gen_jral_insn(unsigned long addr) +{ + unsigned long opcode = 0x4a000001; + unsigned long rt_num = 0x1e << 20; + unsigned long rb_num = 0xf << 10; + + return ENDIAN_CONVERT(opcode | rt_num | rb_num); +} + +static void ftrace_gen_call_insn(unsigned long *call_insns, + unsigned long addr) +{ + call_insns[0] = gen_sethi_insn(addr); /* sethi $r15, imm20u */ + call_insns[1] = gen_ori_insn(addr); /* ori $r15, $r15, imm15u */ + call_insns[2] = gen_jral_insn(addr); /* jral $lp, $r15 */ +} + +static int __ftrace_modify_code(unsigned long pc, unsigned long *old_insn, + unsigned long *new_insn, bool validate) +{ + unsigned long orig_insn[3]; + + if (validate) { + if (probe_kernel_read(orig_insn, (void *)pc, MCOUNT_INSN_SIZE)) + return -EFAULT; + if (memcmp(orig_insn, old_insn, MCOUNT_INSN_SIZE)) + return -EINVAL; + } + + if (probe_kernel_write((void *)pc, new_insn, MCOUNT_INSN_SIZE)) + return -EPERM; + + return 0; +} + +static int ftrace_modify_code(unsigned long pc, unsigned long *old_insn, + unsigned long *new_insn, bool validate) +{ + int ret; + + ret = __ftrace_modify_code(pc, old_insn, new_insn, validate); + if (ret) + return ret; + + flush_icache_range(pc, pc + MCOUNT_INSN_SIZE); + + return ret; +} + +int ftrace_update_ftrace_func(ftrace_func_t func) +{ + unsigned long pc = (unsigned long)&ftrace_call; + unsigned long old_insn[3] = {INSN_NOP, INSN_NOP, INSN_NOP}; + unsigned long new_insn[3] = {INSN_NOP, INSN_NOP, INSN_NOP}; + + if (func != ftrace_stub) + ftrace_gen_call_insn(new_insn, (unsigned long)func); + + return ftrace_modify_code(pc, old_insn, new_insn, false); +} + +int ftrace_make_call(struct dyn_ftrace *rec, unsigned long addr) +{ + unsigned long pc = rec->ip; + unsigned long nop_insn[3] = {INSN_NOP, INSN_NOP, INSN_NOP}; + unsigned long call_insn[3] = {INSN_NOP, INSN_NOP, INSN_NOP}; + + ftrace_gen_call_insn(call_insn, addr); + + return ftrace_modify_code(pc, nop_insn, call_insn, true); +} + +int ftrace_make_nop(struct module *mod, struct dyn_ftrace *rec, + unsigned long addr) +{ + unsigned long pc = rec->ip; + unsigned long nop_insn[3] = {INSN_NOP, INSN_NOP, INSN_NOP}; + unsigned long call_insn[3] = {INSN_NOP, INSN_NOP, INSN_NOP}; + + ftrace_gen_call_insn(call_insn, addr); + + return ftrace_modify_code(pc, call_insn, nop_insn, true); +} +#endif /* CONFIG_DYNAMIC_FTRACE */ + +#ifdef CONFIG_FUNCTION_GRAPH_TRACER +void prepare_ftrace_return(unsigned long *parent, unsigned long self_addr, + unsigned long frame_pointer) +{ + unsigned long return_hooker = (unsigned long)&return_to_handler; + unsigned long old; + + if (unlikely(atomic_read(¤t->tracing_graph_pause))) + return; + + old = *parent; + + if (!function_graph_enter(old, self_addr, frame_pointer, NULL)) + *parent = return_hooker; +} + +noinline void ftrace_graph_caller(void) +{ + unsigned long *parent_ip = + (unsigned long *)(__builtin_frame_address(2) - 4); + + unsigned long selfpc = + (unsigned long)(__builtin_return_address(1) - MCOUNT_INSN_SIZE); + + unsigned long frame_pointer = + (unsigned long)__builtin_frame_address(3); + + prepare_ftrace_return(parent_ip, selfpc, frame_pointer); +} + +extern unsigned long ftrace_return_to_handler(unsigned long frame_pointer); +void __naked return_to_handler(void) +{ + __asm__ __volatile__ ( + /* save state needed by the ABI */ + "smw.adm $r0,[$sp],$r1,#0x0 \n\t" + + /* get original return address */ + "move $r0, $fp \n\t" + "bal ftrace_return_to_handler\n\t" + "move $lp, $r0 \n\t" + + /* restore state nedded by the ABI */ + "lmw.bim $r0,[$sp],$r1,#0x0 \n\t"); +} + +#ifdef CONFIG_DYNAMIC_FTRACE +extern unsigned long ftrace_graph_call; + +static int ftrace_modify_graph_caller(bool enable) +{ + unsigned long pc = (unsigned long)&ftrace_graph_call; + unsigned long nop_insn[3] = {INSN_NOP, INSN_NOP, INSN_NOP}; + unsigned long call_insn[3] = {INSN_NOP, INSN_NOP, INSN_NOP}; + + ftrace_gen_call_insn(call_insn, (unsigned long)ftrace_graph_caller); + + if (enable) + return ftrace_modify_code(pc, nop_insn, call_insn, true); + else + return ftrace_modify_code(pc, call_insn, nop_insn, true); +} + +int ftrace_enable_ftrace_graph_caller(void) +{ + return ftrace_modify_graph_caller(true); +} + +int ftrace_disable_ftrace_graph_caller(void) +{ + return ftrace_modify_graph_caller(false); +} +#endif /* CONFIG_DYNAMIC_FTRACE */ + +#endif /* CONFIG_FUNCTION_GRAPH_TRACER */ + + +#ifdef CONFIG_TRACE_IRQFLAGS +noinline void __trace_hardirqs_off(void) +{ + trace_hardirqs_off(); +} +noinline void __trace_hardirqs_on(void) +{ + trace_hardirqs_on(); +} +#endif /* CONFIG_TRACE_IRQFLAGS */ diff --git a/arch/nds32/kernel/head.S b/arch/nds32/kernel/head.S new file mode 100644 index 000000000..c5fdae174 --- /dev/null +++ b/arch/nds32/kernel/head.S @@ -0,0 +1,206 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#include <linux/linkage.h> +#include <linux/init.h> +#include <asm/ptrace.h> +#include <asm/asm-offsets.h> +#include <asm/page.h> +#include <asm/pgtable.h> +#include <asm/sizes.h> +#include <asm/thread_info.h> + +#ifdef CONFIG_CPU_BIG_ENDIAN +#define OF_DT_MAGIC 0xd00dfeed +#else +#define OF_DT_MAGIC 0xedfe0dd0 +#endif + + .globl swapper_pg_dir + .equ swapper_pg_dir, TEXTADDR - 0x4000 + +/* + * Kernel startup entry point. + */ + .section ".head.text", "ax" + .type _stext, %function +ENTRY(_stext) + setgie.d ! Disable interrupt + isb +/* + * Disable I/D-cache and enable it at a proper time + */ + mfsr $r0, $mr8 + li $r1, #~(CACHE_CTL_mskIC_EN|CACHE_CTL_mskDC_EN) + and $r0, $r0, $r1 + mtsr $r0, $mr8 + +/* + * Process device tree blob + */ + andi $r0,$r2,#0x3 + li $r10, 0 + bne $r0, $r10, _nodtb + lwi $r0, [$r2] + li $r1, OF_DT_MAGIC + bne $r0, $r1, _nodtb + move $r10, $r2 +_nodtb: + +/* + * Create a temporary mapping area for booting, before start_kernel + */ + sethi $r4, hi20(swapper_pg_dir) + li $p0, (PAGE_OFFSET - PHYS_OFFSET) + sub $r4, $r4, $p0 + tlbop FlushAll ! invalidate TLB\n" + isb + mtsr $r4, $L1_PPTB ! load page table pointer\n" + +#ifdef CONFIG_CPU_DCACHE_DISABLE + #define MMU_CTL_NTCC MMU_CTL_CACHEABLE_NON +#else + #ifdef CONFIG_CPU_DCACHE_WRITETHROUGH + #define MMU_CTL_NTCC MMU_CTL_CACHEABLE_WT + #else + #define MMU_CTL_NTCC MMU_CTL_CACHEABLE_WB + #endif +#endif + +/* set NTC cacheability, mutliple page size in use */ + mfsr $r3, $MMU_CTL +#if CONFIG_MEMORY_START >= 0xc0000000 + ori $r3, $r3, (MMU_CTL_NTCC << MMU_CTL_offNTC3) +#elif CONFIG_MEMORY_START >= 0x80000000 + ori $r3, $r3, (MMU_CTL_NTCC << MMU_CTL_offNTC2) +#elif CONFIG_MEMORY_START >= 0x40000000 + ori $r3, $r3, (MMU_CTL_NTCC << MMU_CTL_offNTC1) +#else + ori $r3, $r3, (MMU_CTL_NTCC << MMU_CTL_offNTC0) +#endif + +#ifdef CONFIG_ANDES_PAGE_SIZE_4KB + ori $r3, $r3, #(MMU_CTL_mskMPZIU) +#else + ori $r3, $r3, #(MMU_CTL_mskMPZIU|MMU_CTL_D8KB) +#endif +#ifdef CONFIG_HW_SUPPORT_UNALIGNMENT_ACCESS + li $r0, #MMU_CTL_UNA + or $r3, $r3, $r0 +#endif + mtsr $r3, $MMU_CTL + isb + +/* set page size and size of kernel image */ + mfsr $r0, $MMU_CFG + srli $r3, $r0, MMU_CFG_offfEPSZ + zeb $r3, $r3 + bnez $r3, _extra_page_size_support +#ifdef CONFIG_ANDES_PAGE_SIZE_4KB + li $r5, #SZ_4K ! Use 4KB page size +#else + li $r5, #SZ_8K ! Use 8KB page size + li $r3, #1 +#endif + mtsr $r3, $TLB_MISC + b _image_size_check + +_extra_page_size_support: ! Use epzs pages size + clz $r6, $r3 + subri $r2, $r6, #31 + li $r3, #1 + sll $r3, $r3, $r2 + /* MMU_CFG.EPSZ value -> meaning */ + mul $r5, $r3, $r3 + slli $r5, $r5, #14 + /* MMU_CFG.EPSZ -> TLB_MISC.ACC_PSZ */ + addi $r3, $r2, #0x2 + mtsr $r3, $TLB_MISC + +_image_size_check: + /* calculate the image maximum size accepted by TLB config */ + andi $r6, $r0, MMU_CFG_mskTBW + andi $r0, $r0, MMU_CFG_mskTBS + srli $r6, $r6, MMU_CFG_offTBW + srli $r0, $r0, MMU_CFG_offTBS + /* + * we just map the kernel to the maximum way - 1 of tlb + * reserver one way for UART VA mapping + * it will cause page fault if UART mapping cover the kernel mapping + * + * direct mapping is not supported now. + */ + li $r2, 't' + beqz $r6, __error ! MMU_CFG.TBW = 0 is direct mappin + addi $r0, $r0, #0x2 ! MMU_CFG.TBS value -> meaning + sll $r0, $r6, $r0 ! entries = k-way * n-set + mul $r6, $r0, $r5 ! max size = entries * page size + /* check kernel image size */ + la $r3, (_end - PAGE_OFFSET) + li $r2, 's' + bgt $r3, $r6, __error + + li $r2, #(PHYS_OFFSET + TLB_DATA_kernel_text_attr) + li $r3, PAGE_OFFSET + add $r6, $r6, $r3 + +_tlb: + mtsr $r3, $TLB_VPN + dsb + tlbop $r2, RWR + isb + add $r3, $r3, $r5 + add $r2, $r2, $r5 + bgt $r6, $r3, _tlb + mfsr $r3, $TLB_MISC ! setup access page size + li $r2, #~0xf + and $r3, $r3, $r2 +#ifdef CONFIG_ANDES_PAGE_SIZE_8KB + ori $r3, $r3, #0x1 +#endif + mtsr $r3, $TLB_MISC + + mfsr $r0, $MISC_CTL ! Enable BTB and RTP and shadow sp + ori $r0, $r0, #MISC_init + mtsr $r0, $MISC_CTL + + mfsr $p1, $PSW + li $r15, #~PSW_clr ! clear WBNA|DME|IME|DT|IT|POM|INTL|GIE + and $p1, $p1, $r15 + ori $p1, $p1, #PSW_init + mtsr $p1, $IPSW ! when iret, it will automatically enable MMU + la $lp, __mmap_switched + mtsr $lp, $IPC + iret + nop + + .type __switch_data, %object +__switch_data: + .long __bss_start ! $r6 + .long _end ! $r7 + .long __atags_pointer ! $atag_pointer + .long init_task ! $r9, move to $r25 + .long init_thread_union + THREAD_SIZE ! $sp + + +/* + * The following fragment of code is executed with the MMU on in MMU mode, + * and uses absolute addresses; this is not position independent. + */ + .align + .type __mmap_switched, %function +__mmap_switched: + la $r3, __switch_data + lmw.bim $r6, [$r3], $r9, #0b0001 + move $r25, $r9 + move $fp, #0 ! Clear BSS (and zero $fp) + beq $r7, $r6, _RRT +1: swi.bi $fp, [$r6], #4 + bne $r7, $r6, 1b + swi $r10, [$r8] + +_RRT: + b start_kernel + +__error: + b __error diff --git a/arch/nds32/kernel/irq.c b/arch/nds32/kernel/irq.c new file mode 100644 index 000000000..6ff5a672b --- /dev/null +++ b/arch/nds32/kernel/irq.c @@ -0,0 +1,9 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#include <linux/irqchip.h> + +void __init init_IRQ(void) +{ + irqchip_init(); +} diff --git a/arch/nds32/kernel/module.c b/arch/nds32/kernel/module.c new file mode 100644 index 000000000..1e31829cb --- /dev/null +++ b/arch/nds32/kernel/module.c @@ -0,0 +1,278 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#include <linux/module.h> +#include <linux/elf.h> +#include <linux/vmalloc.h> +#include <linux/moduleloader.h> +#include <asm/pgtable.h> + +void *module_alloc(unsigned long size) +{ + return __vmalloc_node_range(size, 1, MODULES_VADDR, MODULES_END, + GFP_KERNEL, PAGE_KERNEL, 0, NUMA_NO_NODE, + __builtin_return_address(0)); +} + +void module_free(struct module *module, void *region) +{ + vfree(region); +} + +int module_frob_arch_sections(Elf_Ehdr * hdr, + Elf_Shdr * sechdrs, + char *secstrings, struct module *mod) +{ + return 0; +} + +void do_reloc16(unsigned int val, unsigned int *loc, unsigned int val_mask, + unsigned int val_shift, unsigned int loc_mask, + unsigned int partial_in_place, unsigned int swap) +{ + unsigned int tmp = 0, tmp2 = 0; + + __asm__ __volatile__("\tlhi.bi\t%0, [%2], 0\n" + "\tbeqz\t%3, 1f\n" + "\twsbh\t%0, %1\n" + "1:\n":"=r"(tmp):"0"(tmp), "r"(loc), "r"(swap) + ); + + tmp2 = tmp & loc_mask; + if (partial_in_place) { + tmp &= (~loc_mask); + tmp = + tmp2 | ((tmp + ((val & val_mask) >> val_shift)) & val_mask); + } else { + tmp = tmp2 | ((val & val_mask) >> val_shift); + } + + __asm__ __volatile__("\tbeqz\t%3, 2f\n" + "\twsbh\t%0, %1\n" + "2:\n" + "\tshi.bi\t%0, [%2], 0\n":"=r"(tmp):"0"(tmp), + "r"(loc), "r"(swap) + ); +} + +void do_reloc32(unsigned int val, unsigned int *loc, unsigned int val_mask, + unsigned int val_shift, unsigned int loc_mask, + unsigned int partial_in_place, unsigned int swap) +{ + unsigned int tmp = 0, tmp2 = 0; + + __asm__ __volatile__("\tlmw.bi\t%0, [%2], %0, 0\n" + "\tbeqz\t%3, 1f\n" + "\twsbh\t%0, %1\n" + "\trotri\t%0, %1, 16\n" + "1:\n":"=r"(tmp):"0"(tmp), "r"(loc), "r"(swap) + ); + + tmp2 = tmp & loc_mask; + if (partial_in_place) { + tmp &= (~loc_mask); + tmp = + tmp2 | ((tmp + ((val & val_mask) >> val_shift)) & val_mask); + } else { + tmp = tmp2 | ((val & val_mask) >> val_shift); + } + + __asm__ __volatile__("\tbeqz\t%3, 2f\n" + "\twsbh\t%0, %1\n" + "\trotri\t%0, %1, 16\n" + "2:\n" + "\tsmw.bi\t%0, [%2], %0, 0\n":"=r"(tmp):"0"(tmp), + "r"(loc), "r"(swap) + ); +} + +static inline int exceed_limit(int offset, unsigned int val_mask, + struct module *module, Elf32_Rela * rel, + unsigned int relindex, unsigned int reloc_order) +{ + int abs_off = offset < 0 ? ~offset : offset; + + if (abs_off & (~val_mask)) { + pr_err("\n%s: relocation type %d out of range.\n" + "please rebuild the kernel module with gcc option \"-Wa,-mno-small-text\".\n", + module->name, ELF32_R_TYPE(rel->r_info)); + pr_err("section %d reloc %d offset 0x%x relative 0x%x.\n", + relindex, reloc_order, rel->r_offset, offset); + return true; + } + return false; +} + +#ifdef __NDS32_EL__ +#define NEED_SWAP 1 +#else +#define NEED_SWAP 0 +#endif + +int +apply_relocate_add(Elf32_Shdr * sechdrs, const char *strtab, + unsigned int symindex, unsigned int relindex, + struct module *module) +{ + Elf32_Shdr *symsec = sechdrs + symindex; + Elf32_Shdr *relsec = sechdrs + relindex; + Elf32_Shdr *dstsec = sechdrs + relsec->sh_info; + Elf32_Rela *rel = (void *)relsec->sh_addr; + unsigned int i; + + for (i = 0; i < relsec->sh_size / sizeof(Elf32_Rela); i++, rel++) { + Elf32_Addr *loc; + Elf32_Sym *sym; + Elf32_Addr v; + s32 offset; + + offset = ELF32_R_SYM(rel->r_info); + if (offset < 0 + || offset > (symsec->sh_size / sizeof(Elf32_Sym))) { + pr_err("%s: bad relocation\n", module->name); + pr_err("section %d reloc %d\n", relindex, i); + return -ENOEXEC; + } + + sym = ((Elf32_Sym *) symsec->sh_addr) + offset; + + if (rel->r_offset < 0 + || rel->r_offset > dstsec->sh_size - sizeof(u16)) { + pr_err("%s: out of bounds relocation\n", module->name); + pr_err("section %d reloc %d offset 0x%0x size %d\n", + relindex, i, rel->r_offset, dstsec->sh_size); + return -ENOEXEC; + } + + loc = (Elf32_Addr *) (dstsec->sh_addr + rel->r_offset); + v = sym->st_value + rel->r_addend; + + switch (ELF32_R_TYPE(rel->r_info)) { + case R_NDS32_NONE: + case R_NDS32_INSN16: + case R_NDS32_LABEL: + case R_NDS32_LONGCALL1: + case R_NDS32_LONGCALL2: + case R_NDS32_LONGCALL3: + case R_NDS32_LONGCALL4: + case R_NDS32_LONGJUMP1: + case R_NDS32_LONGJUMP2: + case R_NDS32_LONGJUMP3: + case R_NDS32_9_FIXED_RELA: + case R_NDS32_15_FIXED_RELA: + case R_NDS32_17_FIXED_RELA: + case R_NDS32_25_FIXED_RELA: + case R_NDS32_LOADSTORE: + case R_NDS32_DWARF2_OP1_RELA: + case R_NDS32_DWARF2_OP2_RELA: + case R_NDS32_DWARF2_LEB_RELA: + case R_NDS32_RELA_NOP_MIX ... R_NDS32_RELA_NOP_MAX: + break; + + case R_NDS32_32_RELA: + do_reloc32(v, loc, 0xffffffff, 0, 0, 0, 0); + break; + + case R_NDS32_HI20_RELA: + do_reloc32(v, loc, 0xfffff000, 12, 0xfff00000, 0, + NEED_SWAP); + break; + + case R_NDS32_LO12S3_RELA: + do_reloc32(v, loc, 0x00000fff, 3, 0xfffff000, 0, + NEED_SWAP); + break; + + case R_NDS32_LO12S2_RELA: + do_reloc32(v, loc, 0x00000fff, 2, 0xfffff000, 0, + NEED_SWAP); + break; + + case R_NDS32_LO12S1_RELA: + do_reloc32(v, loc, 0x00000fff, 1, 0xfffff000, 0, + NEED_SWAP); + break; + + case R_NDS32_LO12S0_RELA: + case R_NDS32_LO12S0_ORI_RELA: + do_reloc32(v, loc, 0x00000fff, 0, 0xfffff000, 0, + NEED_SWAP); + break; + + case R_NDS32_9_PCREL_RELA: + if (exceed_limit + ((v - (Elf32_Addr) loc), 0x000000ff, module, rel, + relindex, i)) + return -ENOEXEC; + do_reloc16(v - (Elf32_Addr) loc, loc, 0x000001ff, 1, + 0xffffff00, 0, NEED_SWAP); + break; + + case R_NDS32_15_PCREL_RELA: + if (exceed_limit + ((v - (Elf32_Addr) loc), 0x00003fff, module, rel, + relindex, i)) + return -ENOEXEC; + do_reloc32(v - (Elf32_Addr) loc, loc, 0x00007fff, 1, + 0xffffc000, 0, NEED_SWAP); + break; + + case R_NDS32_17_PCREL_RELA: + if (exceed_limit + ((v - (Elf32_Addr) loc), 0x0000ffff, module, rel, + relindex, i)) + return -ENOEXEC; + do_reloc32(v - (Elf32_Addr) loc, loc, 0x0001ffff, 1, + 0xffff0000, 0, NEED_SWAP); + break; + + case R_NDS32_25_PCREL_RELA: + if (exceed_limit + ((v - (Elf32_Addr) loc), 0x00ffffff, module, rel, + relindex, i)) + return -ENOEXEC; + do_reloc32(v - (Elf32_Addr) loc, loc, 0x01ffffff, 1, + 0xff000000, 0, NEED_SWAP); + break; + case R_NDS32_WORD_9_PCREL_RELA: + if (exceed_limit + ((v - (Elf32_Addr) loc), 0x000000ff, module, rel, + relindex, i)) + return -ENOEXEC; + do_reloc32(v - (Elf32_Addr) loc, loc, 0x000001ff, 1, + 0xffffff00, 0, NEED_SWAP); + break; + + case R_NDS32_SDA15S3_RELA: + case R_NDS32_SDA15S2_RELA: + case R_NDS32_SDA15S1_RELA: + case R_NDS32_SDA15S0_RELA: + pr_err("%s: unsupported relocation type %d.\n", + module->name, ELF32_R_TYPE(rel->r_info)); + pr_err + ("Small data section access doesn't work in the kernel space; " + "please rebuild the kernel module with gcc option -mcmodel=large.\n"); + pr_err("section %d reloc %d offset 0x%x size %d\n", + relindex, i, rel->r_offset, dstsec->sh_size); + break; + + default: + pr_err("%s: unsupported relocation type %d.\n", + module->name, ELF32_R_TYPE(rel->r_info)); + pr_err("section %d reloc %d offset 0x%x size %d\n", + relindex, i, rel->r_offset, dstsec->sh_size); + } + } + return 0; +} + +int +module_finalize(const Elf32_Ehdr * hdr, const Elf_Shdr * sechdrs, + struct module *module) +{ + return 0; +} + +void module_arch_cleanup(struct module *mod) +{ +} diff --git a/arch/nds32/kernel/nds32_ksyms.c b/arch/nds32/kernel/nds32_ksyms.c new file mode 100644 index 000000000..5ecebd0e6 --- /dev/null +++ b/arch/nds32/kernel/nds32_ksyms.c @@ -0,0 +1,31 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#include <linux/module.h> +#include <linux/string.h> +#include <linux/delay.h> +#include <linux/in6.h> +#include <linux/syscalls.h> +#include <linux/uaccess.h> + +#include <asm/checksum.h> +#include <asm/io.h> +#include <asm/ftrace.h> +#include <asm/proc-fns.h> + +/* mem functions */ +EXPORT_SYMBOL(memset); +EXPORT_SYMBOL(memcpy); +EXPORT_SYMBOL(memmove); +EXPORT_SYMBOL(memzero); + +/* user mem (segment) */ +EXPORT_SYMBOL(__arch_copy_from_user); +EXPORT_SYMBOL(__arch_copy_to_user); +EXPORT_SYMBOL(__arch_clear_user); + +/* cache handling */ +EXPORT_SYMBOL(cpu_icache_inval_all); +EXPORT_SYMBOL(cpu_dcache_wbinval_all); +EXPORT_SYMBOL(cpu_dma_inval_range); +EXPORT_SYMBOL(cpu_dma_wb_range); diff --git a/arch/nds32/kernel/process.c b/arch/nds32/kernel/process.c new file mode 100644 index 000000000..65fda986e --- /dev/null +++ b/arch/nds32/kernel/process.c @@ -0,0 +1,208 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#include <linux/sched.h> +#include <linux/sched/debug.h> +#include <linux/sched/task_stack.h> +#include <linux/delay.h> +#include <linux/kallsyms.h> +#include <linux/uaccess.h> +#include <asm/elf.h> +#include <asm/proc-fns.h> +#include <linux/ptrace.h> +#include <linux/reboot.h> + +extern void setup_mm_for_reboot(char mode); +#ifdef CONFIG_PROC_FS +struct proc_dir_entry *proc_dir_cpu; +EXPORT_SYMBOL(proc_dir_cpu); +#endif + +extern inline void arch_reset(char mode) +{ + if (mode == 's') { + /* Use cpu handler, jump to 0 */ + cpu_reset(0); + } +} + +void (*pm_power_off) (void); +EXPORT_SYMBOL(pm_power_off); + +static char reboot_mode_nds32 = 'h'; + +int __init reboot_setup(char *str) +{ + reboot_mode_nds32 = str[0]; + return 1; +} + +static int cpub_pwroff(void) +{ + return 0; +} + +__setup("reboot=", reboot_setup); + +void machine_halt(void) +{ + cpub_pwroff(); +} + +EXPORT_SYMBOL(machine_halt); + +void machine_power_off(void) +{ + if (pm_power_off) + pm_power_off(); +} + +EXPORT_SYMBOL(machine_power_off); + +void machine_restart(char *cmd) +{ + /* + * Clean and disable cache, and turn off interrupts + */ + cpu_proc_fin(); + + /* + * Tell the mm system that we are going to reboot - + * we may need it to insert some 1:1 mappings so that + * soft boot works. + */ + setup_mm_for_reboot(reboot_mode_nds32); + + /* Execute kernel restart handler call chain */ + do_kernel_restart(cmd); + + /* + * Now call the architecture specific reboot code. + */ + arch_reset(reboot_mode_nds32); + + /* + * Whoops - the architecture was unable to reboot. + * Tell the user! + */ + mdelay(1000); + pr_info("Reboot failed -- System halted\n"); + while (1) ; +} + +EXPORT_SYMBOL(machine_restart); + +void show_regs(struct pt_regs *regs) +{ + printk("PC is at %pS\n", (void *)instruction_pointer(regs)); + printk("LP is at %pS\n", (void *)regs->lp); + pr_info("pc : [<%08lx>] lp : [<%08lx>] %s\n" + "sp : %08lx fp : %08lx gp : %08lx\n", + instruction_pointer(regs), + regs->lp, print_tainted(), regs->sp, regs->fp, regs->gp); + pr_info("r25: %08lx r24: %08lx\n", regs->uregs[25], regs->uregs[24]); + + pr_info("r23: %08lx r22: %08lx r21: %08lx r20: %08lx\n", + regs->uregs[23], regs->uregs[22], + regs->uregs[21], regs->uregs[20]); + pr_info("r19: %08lx r18: %08lx r17: %08lx r16: %08lx\n", + regs->uregs[19], regs->uregs[18], + regs->uregs[17], regs->uregs[16]); + pr_info("r15: %08lx r14: %08lx r13: %08lx r12: %08lx\n", + regs->uregs[15], regs->uregs[14], + regs->uregs[13], regs->uregs[12]); + pr_info("r11: %08lx r10: %08lx r9 : %08lx r8 : %08lx\n", + regs->uregs[11], regs->uregs[10], + regs->uregs[9], regs->uregs[8]); + pr_info("r7 : %08lx r6 : %08lx r5 : %08lx r4 : %08lx\n", + regs->uregs[7], regs->uregs[6], regs->uregs[5], regs->uregs[4]); + pr_info("r3 : %08lx r2 : %08lx r1 : %08lx r0 : %08lx\n", + regs->uregs[3], regs->uregs[2], regs->uregs[1], regs->uregs[0]); + pr_info(" IRQs o%s Segment %s\n", + interrupts_enabled(regs) ? "n" : "ff", + segment_eq(get_fs(), get_ds())? "kernel" : "user"); +} + +EXPORT_SYMBOL(show_regs); + +void flush_thread(void) +{ +} + +DEFINE_PER_CPU(struct task_struct *, __entry_task); + +asmlinkage void ret_from_fork(void) __asm__("ret_from_fork"); +int copy_thread(unsigned long clone_flags, unsigned long stack_start, + unsigned long stk_sz, struct task_struct *p) +{ + struct pt_regs *childregs = task_pt_regs(p); + + memset(&p->thread.cpu_context, 0, sizeof(struct cpu_context)); + + if (unlikely(p->flags & PF_KTHREAD)) { + memset(childregs, 0, sizeof(struct pt_regs)); + /* kernel thread fn */ + p->thread.cpu_context.r6 = stack_start; + /* kernel thread argument */ + p->thread.cpu_context.r7 = stk_sz; + } else { + *childregs = *current_pt_regs(); + if (stack_start) + childregs->sp = stack_start; + /* child get zero as ret. */ + childregs->uregs[0] = 0; + childregs->osp = 0; + if (clone_flags & CLONE_SETTLS) + childregs->uregs[25] = childregs->uregs[3]; + } + /* cpu context switching */ + p->thread.cpu_context.pc = (unsigned long)ret_from_fork; + p->thread.cpu_context.sp = (unsigned long)childregs; + +#ifdef CONFIG_HWZOL + childregs->lb = 0; + childregs->le = 0; + childregs->lc = 0; +#endif + + return 0; +} + +/* + * fill in the fpe structure for a core dump... + */ +int dump_fpu(struct pt_regs *regs, elf_fpregset_t * fpu) +{ + int fpvalid = 0; + return fpvalid; +} + +EXPORT_SYMBOL(dump_fpu); + +unsigned long get_wchan(struct task_struct *p) +{ + unsigned long fp, lr; + unsigned long stack_start, stack_end; + int count = 0; + + if (!p || p == current || p->state == TASK_RUNNING) + return 0; + + if (IS_ENABLED(CONFIG_FRAME_POINTER)) { + stack_start = (unsigned long)end_of_stack(p); + stack_end = (unsigned long)task_stack_page(p) + THREAD_SIZE; + + fp = thread_saved_fp(p); + do { + if (fp < stack_start || fp > stack_end) + return 0; + lr = ((unsigned long *)fp)[0]; + if (!in_sched_functions(lr)) + return lr; + fp = *(unsigned long *)(fp + 4); + } while (count++ < 16); + } + return 0; +} + +EXPORT_SYMBOL(get_wchan); diff --git a/arch/nds32/kernel/ptrace.c b/arch/nds32/kernel/ptrace.c new file mode 100644 index 000000000..eaaf7a999 --- /dev/null +++ b/arch/nds32/kernel/ptrace.c @@ -0,0 +1,119 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#include <linux/ptrace.h> +#include <linux/regset.h> +#include <linux/tracehook.h> +#include <linux/elf.h> +#include <linux/sched/task_stack.h> + +enum nds32_regset { + REGSET_GPR, +}; + +static int gpr_get(struct task_struct *target, + const struct user_regset *regset, + unsigned int pos, unsigned int count, + void *kbuf, void __user * ubuf) +{ + struct user_pt_regs *uregs = &task_pt_regs(target)->user_regs; + return user_regset_copyout(&pos, &count, &kbuf, &ubuf, uregs, 0, -1); +} + +static int gpr_set(struct task_struct *target, const struct user_regset *regset, + unsigned int pos, unsigned int count, + const void *kbuf, const void __user * ubuf) +{ + int err; + struct user_pt_regs newregs = task_pt_regs(target)->user_regs; + + err = user_regset_copyin(&pos, &count, &kbuf, &ubuf, &newregs, 0, -1); + if (err) + return err; + + task_pt_regs(target)->user_regs = newregs; + return 0; +} + +static const struct user_regset nds32_regsets[] = { + [REGSET_GPR] = { + .core_note_type = NT_PRSTATUS, + .n = sizeof(struct user_pt_regs) / sizeof(u32), + .size = sizeof(elf_greg_t), + .align = sizeof(elf_greg_t), + .get = gpr_get, + .set = gpr_set} +}; + +static const struct user_regset_view nds32_user_view = { + .name = "nds32", + .e_machine = EM_NDS32, + .regsets = nds32_regsets, + .n = ARRAY_SIZE(nds32_regsets) +}; + +const struct user_regset_view *task_user_regset_view(struct task_struct *task) +{ + return &nds32_user_view; +} + +void ptrace_disable(struct task_struct *child) +{ + user_disable_single_step(child); +} + +/* do_ptrace() + * + * Provide ptrace defined service. + */ +long arch_ptrace(struct task_struct *child, long request, unsigned long addr, + unsigned long data) +{ + int ret = -EIO; + + switch (request) { + default: + ret = ptrace_request(child, request, addr, data); + break; + } + + return ret; +} + +void user_enable_single_step(struct task_struct *child) +{ + struct pt_regs *regs; + regs = task_pt_regs(child); + regs->ipsw |= PSW_mskHSS; + set_tsk_thread_flag(child, TIF_SINGLESTEP); +} + +void user_disable_single_step(struct task_struct *child) +{ + struct pt_regs *regs; + regs = task_pt_regs(child); + regs->ipsw &= ~PSW_mskHSS; + clear_tsk_thread_flag(child, TIF_SINGLESTEP); +} + +/* sys_trace() + * + * syscall trace handler. + */ + +asmlinkage int syscall_trace_enter(struct pt_regs *regs) +{ + if (test_thread_flag(TIF_SYSCALL_TRACE)) { + if (tracehook_report_syscall_entry(regs)) + forget_syscall(regs); + } + return regs->syscallno; +} + +asmlinkage void syscall_trace_leave(struct pt_regs *regs) +{ + int step = test_thread_flag(TIF_SINGLESTEP); + if (step || test_thread_flag(TIF_SYSCALL_TRACE)) + tracehook_report_syscall_exit(regs, step); + +} diff --git a/arch/nds32/kernel/setup.c b/arch/nds32/kernel/setup.c new file mode 100644 index 000000000..87683583f --- /dev/null +++ b/arch/nds32/kernel/setup.c @@ -0,0 +1,368 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#include <linux/cpu.h> +#include <linux/bootmem.h> +#include <linux/seq_file.h> +#include <linux/memblock.h> +#include <linux/console.h> +#include <linux/screen_info.h> +#include <linux/delay.h> +#include <linux/dma-mapping.h> +#include <linux/of_fdt.h> +#include <linux/of_platform.h> +#include <asm/setup.h> +#include <asm/sections.h> +#include <asm/proc-fns.h> +#include <asm/cache_info.h> +#include <asm/elf.h> +#include <nds32_intrinsic.h> + +#define HWCAP_MFUSR_PC 0x000001 +#define HWCAP_EXT 0x000002 +#define HWCAP_EXT2 0x000004 +#define HWCAP_FPU 0x000008 +#define HWCAP_AUDIO 0x000010 +#define HWCAP_BASE16 0x000020 +#define HWCAP_STRING 0x000040 +#define HWCAP_REDUCED_REGS 0x000080 +#define HWCAP_VIDEO 0x000100 +#define HWCAP_ENCRYPT 0x000200 +#define HWCAP_EDM 0x000400 +#define HWCAP_LMDMA 0x000800 +#define HWCAP_PFM 0x001000 +#define HWCAP_HSMP 0x002000 +#define HWCAP_TRACE 0x004000 +#define HWCAP_DIV 0x008000 +#define HWCAP_MAC 0x010000 +#define HWCAP_L2C 0x020000 +#define HWCAP_FPU_DP 0x040000 +#define HWCAP_V2 0x080000 +#define HWCAP_DX_REGS 0x100000 + +unsigned long cpu_id, cpu_rev, cpu_cfgid; +char cpu_series; +char *endianness = NULL; + +unsigned int __atags_pointer __initdata; +unsigned int elf_hwcap; +EXPORT_SYMBOL(elf_hwcap); + +/* + * The following string table, must sync with HWCAP_xx bitmask, + * which is defined in <asm/procinfo.h> + */ +static const char *hwcap_str[] = { + "mfusr_pc", + "perf1", + "perf2", + "fpu", + "audio", + "16b", + "string", + "reduced_regs", + "video", + "encrypt", + "edm", + "lmdma", + "pfm", + "hsmp", + "trace", + "div", + "mac", + "l2c", + "fpu_dp", + "v2", + "dx_regs", + NULL, +}; + +#ifdef CONFIG_CPU_DCACHE_WRITETHROUGH +#define WRITE_METHOD "write through" +#else +#define WRITE_METHOD "write back" +#endif + +struct cache_info L1_cache_info[2]; +static void __init dump_cpu_info(int cpu) +{ + int i, p = 0; + char str[sizeof(hwcap_str) + 16]; + + for (i = 0; hwcap_str[i]; i++) { + if (elf_hwcap & (1 << i)) { + sprintf(str + p, "%s ", hwcap_str[i]); + p += strlen(hwcap_str[i]) + 1; + } + } + + pr_info("CPU%d Features: %s\n", cpu, str); + + L1_cache_info[ICACHE].ways = CACHE_WAY(ICACHE); + L1_cache_info[ICACHE].line_size = CACHE_LINE_SIZE(ICACHE); + L1_cache_info[ICACHE].sets = CACHE_SET(ICACHE); + L1_cache_info[ICACHE].size = + L1_cache_info[ICACHE].ways * L1_cache_info[ICACHE].line_size * + L1_cache_info[ICACHE].sets / 1024; + pr_info("L1I:%dKB/%dS/%dW/%dB\n", L1_cache_info[ICACHE].size, + L1_cache_info[ICACHE].sets, L1_cache_info[ICACHE].ways, + L1_cache_info[ICACHE].line_size); + L1_cache_info[DCACHE].ways = CACHE_WAY(DCACHE); + L1_cache_info[DCACHE].line_size = CACHE_LINE_SIZE(DCACHE); + L1_cache_info[DCACHE].sets = CACHE_SET(DCACHE); + L1_cache_info[DCACHE].size = + L1_cache_info[DCACHE].ways * L1_cache_info[DCACHE].line_size * + L1_cache_info[DCACHE].sets / 1024; + pr_info("L1D:%dKB/%dS/%dW/%dB\n", L1_cache_info[DCACHE].size, + L1_cache_info[DCACHE].sets, L1_cache_info[DCACHE].ways, + L1_cache_info[DCACHE].line_size); + pr_info("L1 D-Cache is %s\n", WRITE_METHOD); + if (L1_cache_info[DCACHE].size != L1_CACHE_BYTES) + pr_crit + ("The cache line size(%d) of this processor is not the same as L1_CACHE_BYTES(%d).\n", + L1_cache_info[DCACHE].size, L1_CACHE_BYTES); +#ifdef CONFIG_CPU_CACHE_ALIASING + { + int aliasing_num; + aliasing_num = + L1_cache_info[ICACHE].size * 1024 / PAGE_SIZE / + L1_cache_info[ICACHE].ways; + L1_cache_info[ICACHE].aliasing_num = aliasing_num; + L1_cache_info[ICACHE].aliasing_mask = + (aliasing_num - 1) << PAGE_SHIFT; + aliasing_num = + L1_cache_info[DCACHE].size * 1024 / PAGE_SIZE / + L1_cache_info[DCACHE].ways; + L1_cache_info[DCACHE].aliasing_num = aliasing_num; + L1_cache_info[DCACHE].aliasing_mask = + (aliasing_num - 1) << PAGE_SHIFT; + } +#endif +} + +static void __init setup_cpuinfo(void) +{ + unsigned long tmp = 0, cpu_name; + + cpu_dcache_inval_all(); + cpu_icache_inval_all(); + __nds32__isb(); + + cpu_id = (__nds32__mfsr(NDS32_SR_CPU_VER) & CPU_VER_mskCPUID) >> CPU_VER_offCPUID; + cpu_name = ((cpu_id) & 0xf0) >> 4; + cpu_series = cpu_name ? cpu_name - 10 + 'A' : 'N'; + cpu_id = cpu_id & 0xf; + cpu_rev = (__nds32__mfsr(NDS32_SR_CPU_VER) & CPU_VER_mskREV) >> CPU_VER_offREV; + cpu_cfgid = (__nds32__mfsr(NDS32_SR_CPU_VER) & CPU_VER_mskCFGID) >> CPU_VER_offCFGID; + + pr_info("CPU:%c%ld, CPU_VER 0x%08x(id %lu, rev %lu, cfg %lu)\n", + cpu_series, cpu_id, __nds32__mfsr(NDS32_SR_CPU_VER), cpu_id, cpu_rev, cpu_cfgid); + + elf_hwcap |= HWCAP_MFUSR_PC; + + if (((__nds32__mfsr(NDS32_SR_MSC_CFG) & MSC_CFG_mskBASEV) >> MSC_CFG_offBASEV) == 0) { + if (__nds32__mfsr(NDS32_SR_MSC_CFG) & MSC_CFG_mskDIV) + elf_hwcap |= HWCAP_DIV; + + if ((__nds32__mfsr(NDS32_SR_MSC_CFG) & MSC_CFG_mskMAC) + || (cpu_id == 12 && cpu_rev < 4)) + elf_hwcap |= HWCAP_MAC; + } else { + elf_hwcap |= HWCAP_V2; + elf_hwcap |= HWCAP_DIV; + elf_hwcap |= HWCAP_MAC; + } + + if (cpu_cfgid & 0x0001) + elf_hwcap |= HWCAP_EXT; + + if (cpu_cfgid & 0x0002) + elf_hwcap |= HWCAP_BASE16; + + if (cpu_cfgid & 0x0004) + elf_hwcap |= HWCAP_EXT2; + + if (cpu_cfgid & 0x0008) + elf_hwcap |= HWCAP_FPU; + + if (cpu_cfgid & 0x0010) + elf_hwcap |= HWCAP_STRING; + + if (__nds32__mfsr(NDS32_SR_MMU_CFG) & MMU_CFG_mskDE) + endianness = "MSB"; + else + endianness = "LSB"; + + if (__nds32__mfsr(NDS32_SR_MSC_CFG) & MSC_CFG_mskEDM) + elf_hwcap |= HWCAP_EDM; + + if (__nds32__mfsr(NDS32_SR_MSC_CFG) & MSC_CFG_mskLMDMA) + elf_hwcap |= HWCAP_LMDMA; + + if (__nds32__mfsr(NDS32_SR_MSC_CFG) & MSC_CFG_mskPFM) + elf_hwcap |= HWCAP_PFM; + + if (__nds32__mfsr(NDS32_SR_MSC_CFG) & MSC_CFG_mskHSMP) + elf_hwcap |= HWCAP_HSMP; + + if (__nds32__mfsr(NDS32_SR_MSC_CFG) & MSC_CFG_mskTRACE) + elf_hwcap |= HWCAP_TRACE; + + if (__nds32__mfsr(NDS32_SR_MSC_CFG) & MSC_CFG_mskAUDIO) + elf_hwcap |= HWCAP_AUDIO; + + if (__nds32__mfsr(NDS32_SR_MSC_CFG) & MSC_CFG_mskL2C) + elf_hwcap |= HWCAP_L2C; + + tmp = __nds32__mfsr(NDS32_SR_CACHE_CTL); + if (!IS_ENABLED(CONFIG_CPU_DCACHE_DISABLE)) + tmp |= CACHE_CTL_mskDC_EN; + + if (!IS_ENABLED(CONFIG_CPU_ICACHE_DISABLE)) + tmp |= CACHE_CTL_mskIC_EN; + __nds32__mtsr_isb(tmp, NDS32_SR_CACHE_CTL); + + dump_cpu_info(smp_processor_id()); +} + +static void __init setup_memory(void) +{ + unsigned long ram_start_pfn; + unsigned long free_ram_start_pfn; + phys_addr_t memory_start, memory_end; + struct memblock_region *region; + + memory_end = memory_start = 0; + + /* Find main memory where is the kernel */ + for_each_memblock(memory, region) { + memory_start = region->base; + memory_end = region->base + region->size; + pr_info("%s: Memory: 0x%x-0x%x\n", __func__, + memory_start, memory_end); + } + + if (!memory_end) { + panic("No memory!"); + } + + ram_start_pfn = PFN_UP(memblock_start_of_DRAM()); + /* free_ram_start_pfn is first page after kernel */ + free_ram_start_pfn = PFN_UP(__pa(&_end)); + max_pfn = PFN_DOWN(memblock_end_of_DRAM()); + /* it could update max_pfn */ + if (max_pfn - ram_start_pfn <= MAXMEM_PFN) + max_low_pfn = max_pfn; + else { + max_low_pfn = MAXMEM_PFN + ram_start_pfn; + if (!IS_ENABLED(CONFIG_HIGHMEM)) + max_pfn = MAXMEM_PFN + ram_start_pfn; + } + /* high_memory is related with VMALLOC */ + high_memory = (void *)__va(max_low_pfn * PAGE_SIZE); + min_low_pfn = free_ram_start_pfn; + + /* + * initialize the boot-time allocator (with low memory only). + * + * This makes the memory from the end of the kernel to the end of + * RAM usable. + */ + memblock_set_bottom_up(true); + memblock_reserve(PFN_PHYS(ram_start_pfn), PFN_PHYS(free_ram_start_pfn - ram_start_pfn)); + + early_init_fdt_reserve_self(); + early_init_fdt_scan_reserved_mem(); + + memblock_dump_all(); +} + +void __init setup_arch(char **cmdline_p) +{ + early_init_devtree(__atags_pointer ? \ + phys_to_virt(__atags_pointer) : __dtb_start); + + setup_cpuinfo(); + + init_mm.start_code = (unsigned long)&_stext; + init_mm.end_code = (unsigned long)&_etext; + init_mm.end_data = (unsigned long)&_edata; + init_mm.brk = (unsigned long)&_end; + + /* setup bootmem allocator */ + setup_memory(); + + /* paging_init() sets up the MMU and marks all pages as reserved */ + paging_init(); + + /* invalidate all TLB entries because the new mapping is created */ + __nds32__tlbop_flua(); + + /* use generic way to parse */ + parse_early_param(); + + unflatten_and_copy_device_tree(); + + if(IS_ENABLED(CONFIG_VT)) { + if(IS_ENABLED(CONFIG_DUMMY_CONSOLE)) + conswitchp = &dummy_con; + } + + *cmdline_p = boot_command_line; + early_trap_init(); +} + +static int c_show(struct seq_file *m, void *v) +{ + int i; + + seq_printf(m, "Processor\t: %c%ld (id %lu, rev %lu, cfg %lu)\n", + cpu_series, cpu_id, cpu_id, cpu_rev, cpu_cfgid); + + seq_printf(m, "L1I\t\t: %luKB/%luS/%luW/%luB\n", + CACHE_SET(ICACHE) * CACHE_WAY(ICACHE) * + CACHE_LINE_SIZE(ICACHE) / 1024, CACHE_SET(ICACHE), + CACHE_WAY(ICACHE), CACHE_LINE_SIZE(ICACHE)); + + seq_printf(m, "L1D\t\t: %luKB/%luS/%luW/%luB\n", + CACHE_SET(DCACHE) * CACHE_WAY(DCACHE) * + CACHE_LINE_SIZE(DCACHE) / 1024, CACHE_SET(DCACHE), + CACHE_WAY(DCACHE), CACHE_LINE_SIZE(DCACHE)); + + seq_printf(m, "BogoMIPS\t: %lu.%02lu\n", + loops_per_jiffy / (500000 / HZ), + (loops_per_jiffy / (5000 / HZ)) % 100); + + /* dump out the processor features */ + seq_puts(m, "Features\t: "); + + for (i = 0; hwcap_str[i]; i++) + if (elf_hwcap & (1 << i)) + seq_printf(m, "%s ", hwcap_str[i]); + + seq_puts(m, "\n\n"); + + return 0; +} + +static void *c_start(struct seq_file *m, loff_t * pos) +{ + return *pos < 1 ? (void *)1 : NULL; +} + +static void *c_next(struct seq_file *m, void *v, loff_t * pos) +{ + ++*pos; + return NULL; +} + +static void c_stop(struct seq_file *m, void *v) +{ +} + +struct seq_operations cpuinfo_op = { + .start = c_start, + .next = c_next, + .stop = c_stop, + .show = c_show +}; diff --git a/arch/nds32/kernel/signal.c b/arch/nds32/kernel/signal.c new file mode 100644 index 000000000..5d01f6e33 --- /dev/null +++ b/arch/nds32/kernel/signal.c @@ -0,0 +1,324 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#include <linux/errno.h> +#include <linux/signal.h> +#include <linux/ptrace.h> +#include <linux/personality.h> +#include <linux/freezer.h> +#include <linux/tracehook.h> +#include <linux/uaccess.h> + +#include <asm/cacheflush.h> +#include <asm/ucontext.h> +#include <asm/unistd.h> + +#include <asm/ptrace.h> +#include <asm/vdso.h> + +struct rt_sigframe { + struct siginfo info; + struct ucontext uc; +}; + +static int restore_sigframe(struct pt_regs *regs, + struct rt_sigframe __user * sf) +{ + sigset_t set; + int err; + + err = __copy_from_user(&set, &sf->uc.uc_sigmask, sizeof(set)); + if (err == 0) { + set_current_blocked(&set); + } + + __get_user_error(regs->uregs[0], &sf->uc.uc_mcontext.nds32_r0, err); + __get_user_error(regs->uregs[1], &sf->uc.uc_mcontext.nds32_r1, err); + __get_user_error(regs->uregs[2], &sf->uc.uc_mcontext.nds32_r2, err); + __get_user_error(regs->uregs[3], &sf->uc.uc_mcontext.nds32_r3, err); + __get_user_error(regs->uregs[4], &sf->uc.uc_mcontext.nds32_r4, err); + __get_user_error(regs->uregs[5], &sf->uc.uc_mcontext.nds32_r5, err); + __get_user_error(regs->uregs[6], &sf->uc.uc_mcontext.nds32_r6, err); + __get_user_error(regs->uregs[7], &sf->uc.uc_mcontext.nds32_r7, err); + __get_user_error(regs->uregs[8], &sf->uc.uc_mcontext.nds32_r8, err); + __get_user_error(regs->uregs[9], &sf->uc.uc_mcontext.nds32_r9, err); + __get_user_error(regs->uregs[10], &sf->uc.uc_mcontext.nds32_r10, err); + __get_user_error(regs->uregs[11], &sf->uc.uc_mcontext.nds32_r11, err); + __get_user_error(regs->uregs[12], &sf->uc.uc_mcontext.nds32_r12, err); + __get_user_error(regs->uregs[13], &sf->uc.uc_mcontext.nds32_r13, err); + __get_user_error(regs->uregs[14], &sf->uc.uc_mcontext.nds32_r14, err); + __get_user_error(regs->uregs[15], &sf->uc.uc_mcontext.nds32_r15, err); + __get_user_error(regs->uregs[16], &sf->uc.uc_mcontext.nds32_r16, err); + __get_user_error(regs->uregs[17], &sf->uc.uc_mcontext.nds32_r17, err); + __get_user_error(regs->uregs[18], &sf->uc.uc_mcontext.nds32_r18, err); + __get_user_error(regs->uregs[19], &sf->uc.uc_mcontext.nds32_r19, err); + __get_user_error(regs->uregs[20], &sf->uc.uc_mcontext.nds32_r20, err); + __get_user_error(regs->uregs[21], &sf->uc.uc_mcontext.nds32_r21, err); + __get_user_error(regs->uregs[22], &sf->uc.uc_mcontext.nds32_r22, err); + __get_user_error(regs->uregs[23], &sf->uc.uc_mcontext.nds32_r23, err); + __get_user_error(regs->uregs[24], &sf->uc.uc_mcontext.nds32_r24, err); + __get_user_error(regs->uregs[25], &sf->uc.uc_mcontext.nds32_r25, err); + + __get_user_error(regs->fp, &sf->uc.uc_mcontext.nds32_fp, err); + __get_user_error(regs->gp, &sf->uc.uc_mcontext.nds32_gp, err); + __get_user_error(regs->lp, &sf->uc.uc_mcontext.nds32_lp, err); + __get_user_error(regs->sp, &sf->uc.uc_mcontext.nds32_sp, err); + __get_user_error(regs->ipc, &sf->uc.uc_mcontext.nds32_ipc, err); +#if defined(CONFIG_HWZOL) + __get_user_error(regs->lc, &sf->uc.uc_mcontext.zol.nds32_lc, err); + __get_user_error(regs->le, &sf->uc.uc_mcontext.zol.nds32_le, err); + __get_user_error(regs->lb, &sf->uc.uc_mcontext.zol.nds32_lb, err); +#endif + + /* + * Avoid sys_rt_sigreturn() restarting. + */ + forget_syscall(regs); + return err; +} + +asmlinkage long sys_rt_sigreturn(struct pt_regs *regs) +{ + struct rt_sigframe __user *frame; + + /* Always make any pending restarted system calls return -EINTR */ + current->restart_block.fn = do_no_restart_syscall; + + /* + * Since we stacked the signal on a 64-bit boundary, + * then 'sp' should be two-word aligned here. If it's + * not, then the user is trying to mess with us. + */ + if (regs->sp & 7) + goto badframe; + + frame = (struct rt_sigframe __user *)regs->sp; + + if (!access_ok(VERIFY_READ, frame, sizeof(*frame))) + goto badframe; + + if (restore_sigframe(regs, frame)) + goto badframe; + + if (restore_altstack(&frame->uc.uc_stack)) + goto badframe; + + return regs->uregs[0]; + +badframe: + force_sig(SIGSEGV, current); + return 0; +} + +static int +setup_sigframe(struct rt_sigframe __user * sf, struct pt_regs *regs, + sigset_t * set) +{ + int err = 0; + + __put_user_error(regs->uregs[0], &sf->uc.uc_mcontext.nds32_r0, err); + __put_user_error(regs->uregs[1], &sf->uc.uc_mcontext.nds32_r1, err); + __put_user_error(regs->uregs[2], &sf->uc.uc_mcontext.nds32_r2, err); + __put_user_error(regs->uregs[3], &sf->uc.uc_mcontext.nds32_r3, err); + __put_user_error(regs->uregs[4], &sf->uc.uc_mcontext.nds32_r4, err); + __put_user_error(regs->uregs[5], &sf->uc.uc_mcontext.nds32_r5, err); + __put_user_error(regs->uregs[6], &sf->uc.uc_mcontext.nds32_r6, err); + __put_user_error(regs->uregs[7], &sf->uc.uc_mcontext.nds32_r7, err); + __put_user_error(regs->uregs[8], &sf->uc.uc_mcontext.nds32_r8, err); + __put_user_error(regs->uregs[9], &sf->uc.uc_mcontext.nds32_r9, err); + __put_user_error(regs->uregs[10], &sf->uc.uc_mcontext.nds32_r10, err); + __put_user_error(regs->uregs[11], &sf->uc.uc_mcontext.nds32_r11, err); + __put_user_error(regs->uregs[12], &sf->uc.uc_mcontext.nds32_r12, err); + __put_user_error(regs->uregs[13], &sf->uc.uc_mcontext.nds32_r13, err); + __put_user_error(regs->uregs[14], &sf->uc.uc_mcontext.nds32_r14, err); + __put_user_error(regs->uregs[15], &sf->uc.uc_mcontext.nds32_r15, err); + __put_user_error(regs->uregs[16], &sf->uc.uc_mcontext.nds32_r16, err); + __put_user_error(regs->uregs[17], &sf->uc.uc_mcontext.nds32_r17, err); + __put_user_error(regs->uregs[18], &sf->uc.uc_mcontext.nds32_r18, err); + __put_user_error(regs->uregs[19], &sf->uc.uc_mcontext.nds32_r19, err); + __put_user_error(regs->uregs[20], &sf->uc.uc_mcontext.nds32_r20, err); + + __put_user_error(regs->uregs[21], &sf->uc.uc_mcontext.nds32_r21, err); + __put_user_error(regs->uregs[22], &sf->uc.uc_mcontext.nds32_r22, err); + __put_user_error(regs->uregs[23], &sf->uc.uc_mcontext.nds32_r23, err); + __put_user_error(regs->uregs[24], &sf->uc.uc_mcontext.nds32_r24, err); + __put_user_error(regs->uregs[25], &sf->uc.uc_mcontext.nds32_r25, err); + __put_user_error(regs->fp, &sf->uc.uc_mcontext.nds32_fp, err); + __put_user_error(regs->gp, &sf->uc.uc_mcontext.nds32_gp, err); + __put_user_error(regs->lp, &sf->uc.uc_mcontext.nds32_lp, err); + __put_user_error(regs->sp, &sf->uc.uc_mcontext.nds32_sp, err); + __put_user_error(regs->ipc, &sf->uc.uc_mcontext.nds32_ipc, err); +#if defined(CONFIG_HWZOL) + __put_user_error(regs->lc, &sf->uc.uc_mcontext.zol.nds32_lc, err); + __put_user_error(regs->le, &sf->uc.uc_mcontext.zol.nds32_le, err); + __put_user_error(regs->lb, &sf->uc.uc_mcontext.zol.nds32_lb, err); +#endif + + __put_user_error(current->thread.trap_no, &sf->uc.uc_mcontext.trap_no, + err); + __put_user_error(current->thread.error_code, + &sf->uc.uc_mcontext.error_code, err); + __put_user_error(current->thread.address, + &sf->uc.uc_mcontext.fault_address, err); + __put_user_error(set->sig[0], &sf->uc.uc_mcontext.oldmask, err); + + err |= __copy_to_user(&sf->uc.uc_sigmask, set, sizeof(*set)); + + return err; +} + +static inline void __user *get_sigframe(struct ksignal *ksig, + struct pt_regs *regs, int framesize) +{ + unsigned long sp; + + /* Default to using normal stack */ + sp = regs->sp; + + /* + * If we are on the alternate signal stack and would overflow it, don't. + * Return an always-bogus address instead so we will die with SIGSEGV. + */ + if (on_sig_stack(sp) && !likely(on_sig_stack(sp - framesize))) + return (void __user __force *)(-1UL); + + /* This is the X/Open sanctioned signal stack switching. */ + sp = (sigsp(sp, ksig) - framesize); + + /* + * nds32 mandates 8-byte alignment + */ + sp &= ~0x7UL; + + return (void __user *)sp; +} + +static int +setup_return(struct pt_regs *regs, struct ksignal *ksig, void __user * frame) +{ + unsigned long handler = (unsigned long)ksig->ka.sa.sa_handler; + unsigned long retcode; + + retcode = VDSO_SYMBOL(current->mm->context.vdso, rt_sigtramp); + regs->uregs[0] = ksig->sig; + regs->sp = (unsigned long)frame; + regs->lp = retcode; + regs->ipc = handler; + + return 0; +} + +static int +setup_rt_frame(struct ksignal *ksig, sigset_t * set, struct pt_regs *regs) +{ + struct rt_sigframe __user *frame = + get_sigframe(ksig, regs, sizeof(*frame)); + int err = 0; + + if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame))) + return -EFAULT; + + __put_user_error(0, &frame->uc.uc_flags, err); + __put_user_error(NULL, &frame->uc.uc_link, err); + + err |= __save_altstack(&frame->uc.uc_stack, regs->sp); + err |= setup_sigframe(frame, regs, set); + if (err == 0) { + setup_return(regs, ksig, frame); + if (ksig->ka.sa.sa_flags & SA_SIGINFO) { + err |= copy_siginfo_to_user(&frame->info, &ksig->info); + regs->uregs[1] = (unsigned long)&frame->info; + regs->uregs[2] = (unsigned long)&frame->uc; + } + } + return err; +} + +/* + * OK, we're invoking a handler + */ +static void handle_signal(struct ksignal *ksig, struct pt_regs *regs) +{ + int ret; + sigset_t *oldset = sigmask_to_save(); + + if (in_syscall(regs)) { + /* Avoid additional syscall restarting via ret_slow_syscall. */ + forget_syscall(regs); + + switch (regs->uregs[0]) { + case -ERESTART_RESTARTBLOCK: + case -ERESTARTNOHAND: + regs->uregs[0] = -EINTR; + break; + case -ERESTARTSYS: + if (!(ksig->ka.sa.sa_flags & SA_RESTART)) { + regs->uregs[0] = -EINTR; + break; + } + case -ERESTARTNOINTR: + regs->uregs[0] = regs->orig_r0; + regs->ipc -= 4; + break; + } + } + /* + * Set up the stack frame + */ + ret = setup_rt_frame(ksig, oldset, regs); + + signal_setup_done(ret, ksig, 0); +} + +/* + * Note that 'init' is a special process: it doesn't get signals it doesn't + * want to handle. Thus you cannot kill init even with a SIGKILL even by + * mistake. + * + * Note that we go through the signals twice: once to check the signals that + * the kernel can handle, and then we build all the user-level signal handling + * stack-frames in one go after that. + */ +static void do_signal(struct pt_regs *regs) +{ + struct ksignal ksig; + + if (get_signal(&ksig)) { + handle_signal(&ksig, regs); + return; + } + + /* + * If we were from a system call, check for system call restarting... + */ + if (in_syscall(regs)) { + /* Restart the system call - no handlers present */ + + /* Avoid additional syscall restarting via ret_slow_syscall. */ + forget_syscall(regs); + + switch (regs->uregs[0]) { + case -ERESTART_RESTARTBLOCK: + regs->uregs[15] = __NR_restart_syscall; + case -ERESTARTNOHAND: + case -ERESTARTSYS: + case -ERESTARTNOINTR: + regs->uregs[0] = regs->orig_r0; + regs->ipc -= 0x4; + break; + } + } + restore_saved_sigmask(); +} + +asmlinkage void +do_notify_resume(struct pt_regs *regs, unsigned int thread_flags) +{ + if (thread_flags & _TIF_SIGPENDING) + do_signal(regs); + + if (thread_flags & _TIF_NOTIFY_RESUME) { + clear_thread_flag(TIF_NOTIFY_RESUME); + tracehook_notify_resume(regs); + } +} diff --git a/arch/nds32/kernel/stacktrace.c b/arch/nds32/kernel/stacktrace.c new file mode 100644 index 000000000..d974c0c1c --- /dev/null +++ b/arch/nds32/kernel/stacktrace.c @@ -0,0 +1,53 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#include <linux/sched/debug.h> +#include <linux/sched/task_stack.h> +#include <linux/stacktrace.h> +#include <linux/ftrace.h> + +void save_stack_trace(struct stack_trace *trace) +{ + save_stack_trace_tsk(current, trace); +} +EXPORT_SYMBOL_GPL(save_stack_trace); + +void save_stack_trace_tsk(struct task_struct *tsk, struct stack_trace *trace) +{ + unsigned long *fpn; + int skip = trace->skip; + int savesched; + int graph_idx = 0; + + if (tsk == current) { + __asm__ __volatile__("\tori\t%0, $fp, #0\n":"=r"(fpn)); + savesched = 1; + } else { + fpn = (unsigned long *)thread_saved_fp(tsk); + savesched = 0; + } + + while (!kstack_end(fpn) && !((unsigned long)fpn & 0x3) + && (fpn >= (unsigned long *)TASK_SIZE)) { + unsigned long lpp, fpp; + + lpp = fpn[LP_OFFSET]; + fpp = fpn[FP_OFFSET]; + if (!__kernel_text_address(lpp)) + break; + else + lpp = ftrace_graph_ret_addr(tsk, &graph_idx, lpp, NULL); + + if (savesched || !in_sched_functions(lpp)) { + if (skip) { + skip--; + } else { + trace->entries[trace->nr_entries++] = lpp; + if (trace->nr_entries >= trace->max_entries) + break; + } + } + fpn = (unsigned long *)fpp; + } +} +EXPORT_SYMBOL_GPL(save_stack_trace_tsk); diff --git a/arch/nds32/kernel/sys_nds32.c b/arch/nds32/kernel/sys_nds32.c new file mode 100644 index 000000000..9de93ab4c --- /dev/null +++ b/arch/nds32/kernel/sys_nds32.c @@ -0,0 +1,50 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#include <linux/syscalls.h> +#include <linux/uaccess.h> + +#include <asm/cachectl.h> +#include <asm/proc-fns.h> + +SYSCALL_DEFINE6(mmap2, unsigned long, addr, unsigned long, len, + unsigned long, prot, unsigned long, flags, + unsigned long, fd, unsigned long, pgoff) +{ + if (pgoff & (~PAGE_MASK >> 12)) + return -EINVAL; + + return sys_mmap_pgoff(addr, len, prot, flags, fd, + pgoff >> (PAGE_SHIFT - 12)); +} + +SYSCALL_DEFINE4(fadvise64_64_wrapper,int, fd, int, advice, loff_t, offset, + loff_t, len) +{ + return sys_fadvise64_64(fd, offset, len, advice); +} + +SYSCALL_DEFINE3(cacheflush, unsigned int, start, unsigned int, end, int, cache) +{ + struct vm_area_struct *vma; + bool flushi = true, wbd = true; + + vma = find_vma(current->mm, start); + if (!vma) + return -EFAULT; + switch (cache) { + case ICACHE: + wbd = false; + break; + case DCACHE: + flushi = false; + break; + case BCACHE: + break; + default: + return -EINVAL; + } + cpu_cache_wbinval_range_check(vma, start, end, flushi, wbd); + + return 0; +} diff --git a/arch/nds32/kernel/syscall_table.c b/arch/nds32/kernel/syscall_table.c new file mode 100644 index 000000000..7879c061b --- /dev/null +++ b/arch/nds32/kernel/syscall_table.c @@ -0,0 +1,17 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#include <linux/syscalls.h> +#include <linux/signal.h> +#include <linux/unistd.h> +#include <asm/syscalls.h> + +#undef __SYSCALL +#define __SYSCALL(nr, call) [nr] = (call), + +#define sys_rt_sigreturn sys_rt_sigreturn_wrapper +#define sys_fadvise64_64 sys_fadvise64_64_wrapper +void *sys_call_table[__NR_syscalls] __aligned(8192) = { + [0 ... __NR_syscalls - 1] = sys_ni_syscall, +#include <asm/unistd.h> +}; diff --git a/arch/nds32/kernel/time.c b/arch/nds32/kernel/time.c new file mode 100644 index 000000000..ac9d78ce3 --- /dev/null +++ b/arch/nds32/kernel/time.c @@ -0,0 +1,11 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#include <linux/clocksource.h> +#include <linux/clk-provider.h> + +void __init time_init(void) +{ + of_clk_init(NULL); + timer_probe(); +} diff --git a/arch/nds32/kernel/traps.c b/arch/nds32/kernel/traps.c new file mode 100644 index 000000000..1496aab48 --- /dev/null +++ b/arch/nds32/kernel/traps.c @@ -0,0 +1,385 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#include <linux/module.h> +#include <linux/personality.h> +#include <linux/kallsyms.h> +#include <linux/hardirq.h> +#include <linux/kdebug.h> +#include <linux/sched/task_stack.h> +#include <linux/uaccess.h> +#include <linux/ftrace.h> + +#include <asm/proc-fns.h> +#include <asm/unistd.h> + +#include <linux/ptrace.h> +#include <nds32_intrinsic.h> + +extern void show_pte(struct mm_struct *mm, unsigned long addr); + +/* + * Dump out the contents of some memory nicely... + */ +void dump_mem(const char *lvl, unsigned long bottom, unsigned long top) +{ + unsigned long first; + mm_segment_t fs; + int i; + + /* + * We need to switch to kernel mode so that we can use __get_user + * to safely read from kernel space. Note that we now dump the + * code first, just in case the backtrace kills us. + */ + fs = get_fs(); + set_fs(KERNEL_DS); + + pr_emerg("%s(0x%08lx to 0x%08lx)\n", lvl, bottom, top); + + for (first = bottom & ~31; first < top; first += 32) { + unsigned long p; + char str[sizeof(" 12345678") * 8 + 1]; + + memset(str, ' ', sizeof(str)); + str[sizeof(str) - 1] = '\0'; + + for (p = first, i = 0; i < 8 && p < top; i++, p += 4) { + if (p >= bottom && p < top) { + unsigned long val; + if (__get_user(val, (unsigned long *)p) == 0) + sprintf(str + i * 9, " %08lx", val); + else + sprintf(str + i * 9, " ????????"); + } + } + pr_emerg("%s%04lx:%s\n", lvl, first & 0xffff, str); + } + + set_fs(fs); +} + +EXPORT_SYMBOL(dump_mem); + +static void dump_instr(struct pt_regs *regs) +{ + unsigned long addr = instruction_pointer(regs); + mm_segment_t fs; + char str[sizeof("00000000 ") * 5 + 2 + 1], *p = str; + int i; + + return; + /* + * We need to switch to kernel mode so that we can use __get_user + * to safely read from kernel space. Note that we now dump the + * code first, just in case the backtrace kills us. + */ + fs = get_fs(); + set_fs(KERNEL_DS); + + pr_emerg("Code: "); + for (i = -4; i < 1; i++) { + unsigned int val, bad; + + bad = __get_user(val, &((u32 *) addr)[i]); + + if (!bad) { + p += sprintf(p, i == 0 ? "(%08x) " : "%08x ", val); + } else { + p += sprintf(p, "bad PC value"); + break; + } + } + pr_emerg("Code: %s\n", str); + + set_fs(fs); +} + +#define LOOP_TIMES (100) +static void __dump(struct task_struct *tsk, unsigned long *base_reg) +{ + unsigned long ret_addr; + int cnt = LOOP_TIMES, graph = 0; + pr_emerg("Call Trace:\n"); + if (!IS_ENABLED(CONFIG_FRAME_POINTER)) { + while (!kstack_end(base_reg)) { + ret_addr = *base_reg++; + if (__kernel_text_address(ret_addr)) { + ret_addr = ftrace_graph_ret_addr( + tsk, &graph, ret_addr, NULL); + print_ip_sym(ret_addr); + } + if (--cnt < 0) + break; + } + } else { + while (!kstack_end((void *)base_reg) && + !((unsigned long)base_reg & 0x3) && + ((unsigned long)base_reg >= TASK_SIZE)) { + unsigned long next_fp; + ret_addr = base_reg[LP_OFFSET]; + next_fp = base_reg[FP_OFFSET]; + if (__kernel_text_address(ret_addr)) { + + ret_addr = ftrace_graph_ret_addr( + tsk, &graph, ret_addr, NULL); + print_ip_sym(ret_addr); + } + if (--cnt < 0) + break; + base_reg = (unsigned long *)next_fp; + } + } + pr_emerg("\n"); +} + +void show_stack(struct task_struct *tsk, unsigned long *sp) +{ + unsigned long *base_reg; + + if (!tsk) + tsk = current; + if (!IS_ENABLED(CONFIG_FRAME_POINTER)) { + if (tsk != current) + base_reg = (unsigned long *)(tsk->thread.cpu_context.sp); + else + __asm__ __volatile__("\tori\t%0, $sp, #0\n":"=r"(base_reg)); + } else { + if (tsk != current) + base_reg = (unsigned long *)(tsk->thread.cpu_context.fp); + else + __asm__ __volatile__("\tori\t%0, $fp, #0\n":"=r"(base_reg)); + } + __dump(tsk, base_reg); + barrier(); +} + +DEFINE_SPINLOCK(die_lock); + +/* + * This function is protected against re-entrancy. + */ +void die(const char *str, struct pt_regs *regs, int err) +{ + struct task_struct *tsk = current; + static int die_counter; + + console_verbose(); + spin_lock_irq(&die_lock); + bust_spinlocks(1); + + pr_emerg("Internal error: %s: %x [#%d]\n", str, err, ++die_counter); + print_modules(); + pr_emerg("CPU: %i\n", smp_processor_id()); + show_regs(regs); + pr_emerg("Process %s (pid: %d, stack limit = 0x%p)\n", + tsk->comm, tsk->pid, end_of_stack(tsk)); + + if (!user_mode(regs) || in_interrupt()) { + dump_mem("Stack: ", regs->sp, (regs->sp + PAGE_SIZE) & PAGE_MASK); + dump_instr(regs); + dump_stack(); + } + + bust_spinlocks(0); + spin_unlock_irq(&die_lock); + do_exit(SIGSEGV); +} + +EXPORT_SYMBOL(die); + +void die_if_kernel(const char *str, struct pt_regs *regs, int err) +{ + if (user_mode(regs)) + return; + + die(str, regs, err); +} + +int bad_syscall(int n, struct pt_regs *regs) +{ + if (current->personality != PER_LINUX) { + send_sig(SIGSEGV, current, 1); + return regs->uregs[0]; + } + + force_sig_fault(SIGILL, ILL_ILLTRP, + (void __user *)instruction_pointer(regs) - 4, current); + die_if_kernel("Oops - bad syscall", regs, n); + return regs->uregs[0]; +} + +void __pte_error(const char *file, int line, unsigned long val) +{ + pr_emerg("%s:%d: bad pte %08lx.\n", file, line, val); +} + +void __pmd_error(const char *file, int line, unsigned long val) +{ + pr_emerg("%s:%d: bad pmd %08lx.\n", file, line, val); +} + +void __pgd_error(const char *file, int line, unsigned long val) +{ + pr_emerg("%s:%d: bad pgd %08lx.\n", file, line, val); +} + +extern char *exception_vector, *exception_vector_end; +void __init trap_init(void) +{ + return; +} + +void __init early_trap_init(void) +{ + unsigned long ivb = 0; + unsigned long base = PAGE_OFFSET; + + memcpy((unsigned long *)base, (unsigned long *)&exception_vector, + ((unsigned long)&exception_vector_end - + (unsigned long)&exception_vector)); + ivb = __nds32__mfsr(NDS32_SR_IVB); + /* Check platform support. */ + if (((ivb & IVB_mskNIVIC) >> IVB_offNIVIC) < 2) + panic + ("IVIC mode is not allowed on the platform with interrupt controller\n"); + __nds32__mtsr((ivb & ~IVB_mskESZ) | (IVB_valESZ16 << IVB_offESZ) | + IVB_BASE, NDS32_SR_IVB); + __nds32__mtsr(INT_MASK_INITAIAL_VAL, NDS32_SR_INT_MASK); + + /* + * 0x800 = 128 vectors * 16byte. + * It should be enough to flush a page. + */ + cpu_cache_wbinval_page(base, true); +} + +void send_sigtrap(struct task_struct *tsk, struct pt_regs *regs, + int error_code, int si_code) +{ + tsk->thread.trap_no = ENTRY_DEBUG_RELATED; + tsk->thread.error_code = error_code; + + force_sig_fault(SIGTRAP, si_code, + (void __user *)instruction_pointer(regs), tsk); +} + +void do_debug_trap(unsigned long entry, unsigned long addr, + unsigned long type, struct pt_regs *regs) +{ + if (notify_die(DIE_OOPS, "Oops", regs, addr, type, SIGTRAP) + == NOTIFY_STOP) + return; + + if (user_mode(regs)) { + /* trap_signal */ + send_sigtrap(current, regs, 0, TRAP_BRKPT); + } else { + /* kernel_trap */ + if (!fixup_exception(regs)) + die("unexpected kernel_trap", regs, 0); + } +} + +void unhandled_interruption(struct pt_regs *regs) +{ + pr_emerg("unhandled_interruption\n"); + show_regs(regs); + if (!user_mode(regs)) + do_exit(SIGKILL); + force_sig(SIGKILL, current); +} + +void unhandled_exceptions(unsigned long entry, unsigned long addr, + unsigned long type, struct pt_regs *regs) +{ + pr_emerg("Unhandled Exception: entry: %lx addr:%lx itype:%lx\n", entry, + addr, type); + show_regs(regs); + if (!user_mode(regs)) + do_exit(SIGKILL); + force_sig(SIGKILL, current); +} + +extern int do_page_fault(unsigned long entry, unsigned long addr, + unsigned int error_code, struct pt_regs *regs); + +/* + * 2:DEF dispatch for TLB MISC exception handler +*/ + +void do_dispatch_tlb_misc(unsigned long entry, unsigned long addr, + unsigned long type, struct pt_regs *regs) +{ + type = type & (ITYPE_mskINST | ITYPE_mskETYPE); + if ((type & ITYPE_mskETYPE) < 5) { + /* Permission exceptions */ + do_page_fault(entry, addr, type, regs); + } else + unhandled_exceptions(entry, addr, type, regs); +} + +void do_revinsn(struct pt_regs *regs) +{ + pr_emerg("Reserved Instruction\n"); + show_regs(regs); + if (!user_mode(regs)) + do_exit(SIGILL); + force_sig(SIGILL, current); +} + +#ifdef CONFIG_ALIGNMENT_TRAP +extern int unalign_access_mode; +extern int do_unaligned_access(unsigned long addr, struct pt_regs *regs); +#endif +void do_dispatch_general(unsigned long entry, unsigned long addr, + unsigned long itype, struct pt_regs *regs, + unsigned long oipc) +{ + unsigned int swid = itype >> ITYPE_offSWID; + unsigned long type = itype & (ITYPE_mskINST | ITYPE_mskETYPE); + if (type == ETYPE_ALIGNMENT_CHECK) { +#ifdef CONFIG_ALIGNMENT_TRAP + /* Alignment check */ + if (user_mode(regs) && unalign_access_mode) { + int ret; + ret = do_unaligned_access(addr, regs); + + if (ret == 0) + return; + + if (ret == -EFAULT) + pr_emerg + ("Unhandled unaligned access exception\n"); + } +#endif + do_page_fault(entry, addr, type, regs); + } else if (type == ETYPE_RESERVED_INSTRUCTION) { + /* Reserved instruction */ + do_revinsn(regs); + } else if (type == ETYPE_TRAP && swid == SWID_RAISE_INTERRUPT_LEVEL) { + /* trap, used on v3 EDM target debugging workaround */ + /* + * DIPC(OIPC) is passed as parameter before + * interrupt is enabled, so the DIPC will not be corrupted + * even though interrupts are coming in + */ + /* + * 1. update ipc + * 2. update pt_regs ipc with oipc + * 3. update pt_regs ipsw (clear DEX) + */ + __asm__ volatile ("mtsr %0, $IPC\n\t"::"r" (oipc)); + regs->ipc = oipc; + if (regs->pipsw & PSW_mskDEX) { + pr_emerg + ("Nested Debug exception is possibly happened\n"); + pr_emerg("ipc:%08x pipc:%08x\n", + (unsigned int)regs->ipc, + (unsigned int)regs->pipc); + } + do_debug_trap(entry, addr, itype, regs); + regs->ipsw &= ~PSW_mskDEX; + } else + unhandled_exceptions(entry, addr, type, regs); +} diff --git a/arch/nds32/kernel/vdso.c b/arch/nds32/kernel/vdso.c new file mode 100644 index 000000000..016f15891 --- /dev/null +++ b/arch/nds32/kernel/vdso.c @@ -0,0 +1,230 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2012 ARM Limited +// Copyright (C) 2005-2017 Andes Technology Corporation + +#include <linux/cache.h> +#include <linux/clocksource.h> +#include <linux/elf.h> +#include <linux/err.h> +#include <linux/errno.h> +#include <linux/gfp.h> +#include <linux/kernel.h> +#include <linux/mm.h> +#include <linux/sched.h> +#include <linux/signal.h> +#include <linux/slab.h> +#include <linux/timekeeper_internal.h> +#include <linux/vmalloc.h> +#include <linux/random.h> + +#include <asm/cacheflush.h> +#include <asm/vdso.h> +#include <asm/vdso_datapage.h> +#include <asm/vdso_timer_info.h> +#include <asm/cache_info.h> +extern struct cache_info L1_cache_info[2]; +extern char vdso_start[], vdso_end[]; +static unsigned long vdso_pages __ro_after_init; +static unsigned long timer_mapping_base; + +struct timer_info_t timer_info = { + .cycle_count_down = true, + .mapping_base = EMPTY_TIMER_MAPPING, + .cycle_count_reg_offset = EMPTY_REG_OFFSET +}; +/* + * The vDSO data page. + */ +static struct page *no_pages[] = { NULL }; + +static union { + struct vdso_data data; + u8 page[PAGE_SIZE]; +} vdso_data_store __page_aligned_data; +struct vdso_data *vdso_data = &vdso_data_store.data; +static struct vm_special_mapping vdso_spec[2] __ro_after_init = { + { + .name = "[vvar]", + .pages = no_pages, + }, + { + .name = "[vdso]", + }, +}; + +static void get_timer_node_info(void) +{ + timer_mapping_base = timer_info.mapping_base; + vdso_data->cycle_count_offset = + timer_info.cycle_count_reg_offset; + vdso_data->cycle_count_down = + timer_info.cycle_count_down; +} + +static int __init vdso_init(void) +{ + int i; + struct page **vdso_pagelist; + + if (memcmp(vdso_start, "\177ELF", 4)) { + pr_err("vDSO is not a valid ELF object!\n"); + return -EINVAL; + } + /* Creat a timer io mapping to get clock cycles counter */ + get_timer_node_info(); + + vdso_pages = (vdso_end - vdso_start) >> PAGE_SHIFT; + pr_info("vdso: %ld pages (%ld code @ %p, %ld data @ %p)\n", + vdso_pages + 1, vdso_pages, vdso_start, 1L, vdso_data); + + /* Allocate the vDSO pagelist */ + vdso_pagelist = kcalloc(vdso_pages, sizeof(struct page *), GFP_KERNEL); + if (vdso_pagelist == NULL) + return -ENOMEM; + + for (i = 0; i < vdso_pages; i++) + vdso_pagelist[i] = virt_to_page(vdso_start + i * PAGE_SIZE); + vdso_spec[1].pages = &vdso_pagelist[0]; + + return 0; +} + +arch_initcall(vdso_init); + +unsigned long inline vdso_random_addr(unsigned long vdso_mapping_len) +{ + unsigned long start = current->mm->mmap_base, end, offset, addr; + start = PAGE_ALIGN(start); + + /* Round the lowest possible end address up to a PMD boundary. */ + end = (start + vdso_mapping_len + PMD_SIZE - 1) & PMD_MASK; + if (end >= TASK_SIZE) + end = TASK_SIZE; + end -= vdso_mapping_len; + + if (end > start) { + offset = get_random_int() % (((end - start) >> PAGE_SHIFT) + 1); + addr = start + (offset << PAGE_SHIFT); + } else { + addr = start; + } + return addr; +} + +int arch_setup_additional_pages(struct linux_binprm *bprm, int uses_interp) +{ + struct mm_struct *mm = current->mm; + unsigned long vdso_base, vdso_text_len, vdso_mapping_len; + struct vm_area_struct *vma; + unsigned long addr = 0; + pgprot_t prot; + int ret, vvar_page_num = 2; + + vdso_text_len = vdso_pages << PAGE_SHIFT; + + if(timer_mapping_base == EMPTY_VALUE) + vvar_page_num = 1; + /* Be sure to map the data page */ + vdso_mapping_len = vdso_text_len + vvar_page_num * PAGE_SIZE; +#ifdef CONFIG_CPU_CACHE_ALIASING + vdso_mapping_len += L1_cache_info[DCACHE].aliasing_num - 1; +#endif + + if (down_write_killable(&mm->mmap_sem)) + return -EINTR; + + addr = vdso_random_addr(vdso_mapping_len); + vdso_base = get_unmapped_area(NULL, addr, vdso_mapping_len, 0, 0); + if (IS_ERR_VALUE(vdso_base)) { + ret = vdso_base; + goto up_fail; + } + +#ifdef CONFIG_CPU_CACHE_ALIASING + { + unsigned int aliasing_mask = + L1_cache_info[DCACHE].aliasing_mask; + unsigned int page_colour_ofs; + page_colour_ofs = ((unsigned int)vdso_data & aliasing_mask) - + (vdso_base & aliasing_mask); + vdso_base += page_colour_ofs & aliasing_mask; + } +#endif + + vma = _install_special_mapping(mm, vdso_base, vvar_page_num * PAGE_SIZE, + VM_READ | VM_MAYREAD, &vdso_spec[0]); + if (IS_ERR(vma)) { + ret = PTR_ERR(vma); + goto up_fail; + } + + /*Map vdata to user space */ + ret = io_remap_pfn_range(vma, vdso_base, + virt_to_phys(vdso_data) >> PAGE_SHIFT, + PAGE_SIZE, vma->vm_page_prot); + if (ret) + goto up_fail; + + /*Map timer to user space */ + vdso_base += PAGE_SIZE; + prot = __pgprot(_PAGE_V | _PAGE_M_UR_KR | _PAGE_D | _PAGE_C_DEV); + ret = io_remap_pfn_range(vma, vdso_base, timer_mapping_base >> PAGE_SHIFT, + PAGE_SIZE, prot); + if (ret) + goto up_fail; + + /*Map vdso to user space */ + vdso_base += PAGE_SIZE; + mm->context.vdso = (void *)vdso_base; + vma = _install_special_mapping(mm, vdso_base, vdso_text_len, + VM_READ | VM_EXEC | + VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC, + &vdso_spec[1]); + if (IS_ERR(vma)) { + ret = PTR_ERR(vma); + goto up_fail; + } + + up_write(&mm->mmap_sem); + return 0; + +up_fail: + mm->context.vdso = NULL; + up_write(&mm->mmap_sem); + return ret; +} + +static void vdso_write_begin(struct vdso_data *vdata) +{ + ++vdso_data->seq_count; + smp_wmb(); /* Pairs with smp_rmb in vdso_read_retry */ +} + +static void vdso_write_end(struct vdso_data *vdata) +{ + smp_wmb(); /* Pairs with smp_rmb in vdso_read_begin */ + ++vdso_data->seq_count; +} + +void update_vsyscall(struct timekeeper *tk) +{ + vdso_write_begin(vdso_data); + vdso_data->cs_mask = tk->tkr_mono.mask; + vdso_data->cs_mult = tk->tkr_mono.mult; + vdso_data->cs_shift = tk->tkr_mono.shift; + vdso_data->cs_cycle_last = tk->tkr_mono.cycle_last; + vdso_data->wtm_clock_sec = tk->wall_to_monotonic.tv_sec; + vdso_data->wtm_clock_nsec = tk->wall_to_monotonic.tv_nsec; + vdso_data->xtime_clock_sec = tk->xtime_sec; + vdso_data->xtime_clock_nsec = tk->tkr_mono.xtime_nsec; + vdso_data->xtime_coarse_sec = tk->xtime_sec; + vdso_data->xtime_coarse_nsec = tk->tkr_mono.xtime_nsec >> + tk->tkr_mono.shift; + vdso_write_end(vdso_data); +} + +void update_vsyscall_tz(void) +{ + vdso_data->tz_minuteswest = sys_tz.tz_minuteswest; + vdso_data->tz_dsttime = sys_tz.tz_dsttime; +} diff --git a/arch/nds32/kernel/vdso/Makefile b/arch/nds32/kernel/vdso/Makefile new file mode 100644 index 000000000..e6c50a701 --- /dev/null +++ b/arch/nds32/kernel/vdso/Makefile @@ -0,0 +1,82 @@ +# +# Building a vDSO image for AArch64. +# +# Author: Will Deacon <will.deacon@arm.com> +# Heavily based on the vDSO Makefiles for other archs. +# + +obj-vdso := note.o datapage.o sigreturn.o gettimeofday.o + +# Build rules +targets := $(obj-vdso) vdso.so vdso.so.dbg +obj-vdso := $(addprefix $(obj)/, $(obj-vdso)) + +ccflags-y := -shared -fno-common -fno-builtin +ccflags-y += -nostdlib -Wl,-soname=linux-vdso.so.1 \ + $(call cc-ldoption, -Wl$(comma)--hash-style=sysv) +ccflags-y += -fPIC -Wl,-shared -g + +# Disable gcov profiling for VDSO code +GCOV_PROFILE := n + + +obj-y += vdso.o +extra-y += vdso.lds +CPPFLAGS_vdso.lds += -P -C -U$(ARCH) + +# Force dependency +$(obj)/vdso.o : $(obj)/vdso.so + +# Link rule for the .so file, .lds has to be first +$(obj)/vdso.so.dbg: $(src)/vdso.lds $(obj-vdso) + $(call if_changed,vdsold) + + +# Strip rule for the .so file +$(obj)/%.so: OBJCOPYFLAGS := -S +$(obj)/%.so: $(obj)/%.so.dbg FORCE + $(call if_changed,objcopy) + +# Generate VDSO offsets using helper script +gen-vdsosym := $(srctree)/$(src)/gen_vdso_offsets.sh +quiet_cmd_vdsosym = VDSOSYM $@ +define cmd_vdsosym + $(NM) $< | $(gen-vdsosym) | LC_ALL=C sort > $@ +endef + +include/generated/vdso-offsets.h: $(obj)/vdso.so.dbg FORCE + $(call if_changed,vdsosym) + + + +# Assembly rules for the .S files + +sigreturn.o : sigreturn.S + $(call if_changed_dep,vdsoas) + +note.o : note.S + $(call if_changed_dep,vdsoas) + +datapage.o : datapage.S + $(call if_changed_dep,vdsoas) + +gettimeofday.o : gettimeofday.c FORCE + $(call if_changed_dep,vdsocc) + +# Actual build commands +quiet_cmd_vdsold = VDSOL $@ + cmd_vdsold = $(CC) $(c_flags) -Wl,-n -Wl,-T $^ -o $@ +quiet_cmd_vdsoas = VDSOA $@ + cmd_vdsoas = $(CC) $(a_flags) -c -o $@ $< +quiet_cmd_vdsocc = VDSOA $@ + cmd_vdsocc = $(CC) $(c_flags) -c -o $@ $< + +# Install commands for the unstripped file +quiet_cmd_vdso_install = INSTALL $@ + cmd_vdso_install = cp $(obj)/$@.dbg $(MODLIB)/vdso/$@ + +vdso.so: $(obj)/vdso.so.dbg + @mkdir -p $(MODLIB)/vdso + $(call cmd,vdso_install) + +vdso_install: vdso.so diff --git a/arch/nds32/kernel/vdso/datapage.S b/arch/nds32/kernel/vdso/datapage.S new file mode 100644 index 000000000..4a62c3cab --- /dev/null +++ b/arch/nds32/kernel/vdso/datapage.S @@ -0,0 +1,21 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#include <linux/linkage.h> +#include <asm/page.h> + +ENTRY(__get_timerpage) + sethi $r0, hi20(. + PAGE_SIZE + 8) + ori $r0, $r0, lo12(. + PAGE_SIZE + 4) + mfusr $r1, $pc + sub $r0, $r1, $r0 + ret +ENDPROC(__get_timerpage) + +ENTRY(__get_datapage) + sethi $r0, hi20(. + 2*PAGE_SIZE + 8) + ori $r0, $r0, lo12(. + 2*PAGE_SIZE + 4) + mfusr $r1, $pc + sub $r0, $r1, $r0 + ret +ENDPROC(__get_datapage) diff --git a/arch/nds32/kernel/vdso/gen_vdso_offsets.sh b/arch/nds32/kernel/vdso/gen_vdso_offsets.sh new file mode 100755 index 000000000..01924ff07 --- /dev/null +++ b/arch/nds32/kernel/vdso/gen_vdso_offsets.sh @@ -0,0 +1,15 @@ +#!/bin/sh + +# +# Match symbols in the DSO that look like VDSO_*; produce a header file +# of constant offsets into the shared object. +# +# Doing this inside the Makefile will break the $(filter-out) function, +# causing Kbuild to rebuild the vdso-offsets header file every time. +# +# Author: Will Deacon <will.deacon@arm.com +# + +LC_ALL=C +sed -n -e 's/^00*/0/' -e \ +'s/^\([0-9a-fA-F]*\) . VDSO_\([a-zA-Z0-9_]*\)$/\#define vdso_offset_\2\t0x\1/p' diff --git a/arch/nds32/kernel/vdso/gettimeofday.c b/arch/nds32/kernel/vdso/gettimeofday.c new file mode 100644 index 000000000..038721af4 --- /dev/null +++ b/arch/nds32/kernel/vdso/gettimeofday.c @@ -0,0 +1,270 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#include <linux/compiler.h> +#include <linux/hrtimer.h> +#include <linux/time.h> +#include <asm/io.h> +#include <asm/barrier.h> +#include <asm/bug.h> +#include <asm/page.h> +#include <asm/unistd.h> +#include <asm/vdso_datapage.h> +#include <asm/vdso_timer_info.h> +#include <asm/asm-offsets.h> + +#define X(x) #x +#define Y(x) X(x) + +extern struct vdso_data *__get_datapage(void); +extern struct vdso_data *__get_timerpage(void); + +static notrace unsigned int __vdso_read_begin(const struct vdso_data *vdata) +{ + u32 seq; +repeat: + seq = READ_ONCE(vdata->seq_count); + if (seq & 1) { + cpu_relax(); + goto repeat; + } + return seq; +} + +static notrace unsigned int vdso_read_begin(const struct vdso_data *vdata) +{ + unsigned int seq; + + seq = __vdso_read_begin(vdata); + + smp_rmb(); /* Pairs with smp_wmb in vdso_write_end */ + return seq; +} + +static notrace int vdso_read_retry(const struct vdso_data *vdata, u32 start) +{ + smp_rmb(); /* Pairs with smp_wmb in vdso_write_begin */ + return vdata->seq_count != start; +} + +static notrace long clock_gettime_fallback(clockid_t _clkid, + struct timespec *_ts) +{ + register struct timespec *ts asm("$r1") = _ts; + register clockid_t clkid asm("$r0") = _clkid; + register long ret asm("$r0"); + + asm volatile ("movi $r15, %3\n" + "syscall 0x0\n" + :"=r" (ret) + :"r"(clkid), "r"(ts), "i"(__NR_clock_gettime) + :"$r15", "memory"); + + return ret; +} + +static notrace int do_realtime_coarse(struct timespec *ts, + struct vdso_data *vdata) +{ + u32 seq; + + do { + seq = vdso_read_begin(vdata); + + ts->tv_sec = vdata->xtime_coarse_sec; + ts->tv_nsec = vdata->xtime_coarse_nsec; + + } while (vdso_read_retry(vdata, seq)); + return 0; +} + +static notrace int do_monotonic_coarse(struct timespec *ts, + struct vdso_data *vdata) +{ + struct timespec tomono; + u32 seq; + + do { + seq = vdso_read_begin(vdata); + + ts->tv_sec = vdata->xtime_coarse_sec; + ts->tv_nsec = vdata->xtime_coarse_nsec; + + tomono.tv_sec = vdata->wtm_clock_sec; + tomono.tv_nsec = vdata->wtm_clock_nsec; + + } while (vdso_read_retry(vdata, seq)); + + ts->tv_sec += tomono.tv_sec; + timespec_add_ns(ts, tomono.tv_nsec); + return 0; +} + +static notrace inline u64 vgetsns(struct vdso_data *vdso) +{ + u32 cycle_now; + u32 cycle_delta; + u32 *timer_cycle_base; + + timer_cycle_base = + (u32 *) ((char *)__get_timerpage() + vdso->cycle_count_offset); + cycle_now = readl_relaxed(timer_cycle_base); + if (true == vdso->cycle_count_down) + cycle_now = ~(*timer_cycle_base); + cycle_delta = cycle_now - (u32) vdso->cs_cycle_last; + return ((u64) cycle_delta & vdso->cs_mask) * vdso->cs_mult; +} + +static notrace int do_realtime(struct timespec *ts, struct vdso_data *vdata) +{ + unsigned count; + u64 ns; + do { + count = vdso_read_begin(vdata); + ts->tv_sec = vdata->xtime_clock_sec; + ns = vdata->xtime_clock_nsec; + ns += vgetsns(vdata); + ns >>= vdata->cs_shift; + } while (vdso_read_retry(vdata, count)); + + ts->tv_sec += __iter_div_u64_rem(ns, NSEC_PER_SEC, &ns); + ts->tv_nsec = ns; + + return 0; +} + +static notrace int do_monotonic(struct timespec *ts, struct vdso_data *vdata) +{ + struct timespec tomono; + u64 nsecs; + u32 seq; + + do { + seq = vdso_read_begin(vdata); + + ts->tv_sec = vdata->xtime_clock_sec; + nsecs = vdata->xtime_clock_nsec; + nsecs += vgetsns(vdata); + nsecs >>= vdata->cs_shift; + + tomono.tv_sec = vdata->wtm_clock_sec; + tomono.tv_nsec = vdata->wtm_clock_nsec; + + } while (vdso_read_retry(vdata, seq)); + + ts->tv_sec += tomono.tv_sec; + ts->tv_nsec = 0; + timespec_add_ns(ts, nsecs + tomono.tv_nsec); + return 0; +} + +notrace int __vdso_clock_gettime(clockid_t clkid, struct timespec *ts) +{ + struct vdso_data *vdata; + int ret = -1; + + vdata = __get_datapage(); + if (vdata->cycle_count_offset == EMPTY_REG_OFFSET) + return clock_gettime_fallback(clkid, ts); + + switch (clkid) { + case CLOCK_REALTIME_COARSE: + ret = do_realtime_coarse(ts, vdata); + break; + case CLOCK_MONOTONIC_COARSE: + ret = do_monotonic_coarse(ts, vdata); + break; + case CLOCK_REALTIME: + ret = do_realtime(ts, vdata); + break; + case CLOCK_MONOTONIC: + ret = do_monotonic(ts, vdata); + break; + default: + break; + } + + if (ret) + ret = clock_gettime_fallback(clkid, ts); + + return ret; +} + +static notrace int clock_getres_fallback(clockid_t _clk_id, + struct timespec *_res) +{ + register clockid_t clk_id asm("$r0") = _clk_id; + register struct timespec *res asm("$r1") = _res; + register int ret asm("$r0"); + + asm volatile ("movi $r15, %3\n" + "syscall 0x0\n" + :"=r" (ret) + :"r"(clk_id), "r"(res), "i"(__NR_clock_getres) + :"$r15", "memory"); + + return ret; +} + +notrace int __vdso_clock_getres(clockid_t clk_id, struct timespec *res) +{ + if (res == NULL) + return 0; + switch (clk_id) { + case CLOCK_REALTIME: + case CLOCK_MONOTONIC: + case CLOCK_MONOTONIC_RAW: + res->tv_sec = 0; + res->tv_nsec = CLOCK_REALTIME_RES; + break; + case CLOCK_REALTIME_COARSE: + case CLOCK_MONOTONIC_COARSE: + res->tv_sec = 0; + res->tv_nsec = CLOCK_COARSE_RES; + break; + default: + return clock_getres_fallback(clk_id, res); + } + return 0; +} + +static notrace inline int gettimeofday_fallback(struct timeval *_tv, + struct timezone *_tz) +{ + register struct timeval *tv asm("$r0") = _tv; + register struct timezone *tz asm("$r1") = _tz; + register int ret asm("$r0"); + + asm volatile ("movi $r15, %3\n" + "syscall 0x0\n" + :"=r" (ret) + :"r"(tv), "r"(tz), "i"(__NR_gettimeofday) + :"$r15", "memory"); + + return ret; +} + +notrace int __vdso_gettimeofday(struct timeval *tv, struct timezone *tz) +{ + struct timespec ts; + struct vdso_data *vdata; + int ret; + + vdata = __get_datapage(); + + if (vdata->cycle_count_offset == EMPTY_REG_OFFSET) + return gettimeofday_fallback(tv, tz); + + ret = do_realtime(&ts, vdata); + + if (tv) { + tv->tv_sec = ts.tv_sec; + tv->tv_usec = ts.tv_nsec / 1000; + } + if (tz) { + tz->tz_minuteswest = vdata->tz_minuteswest; + tz->tz_dsttime = vdata->tz_dsttime; + } + + return ret; +} diff --git a/arch/nds32/kernel/vdso/note.S b/arch/nds32/kernel/vdso/note.S new file mode 100644 index 000000000..0aeaa19b0 --- /dev/null +++ b/arch/nds32/kernel/vdso/note.S @@ -0,0 +1,11 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2012 ARM Limited +// Copyright (C) 2005-2017 Andes Technology Corporation + +#include <linux/uts.h> +#include <linux/version.h> +#include <linux/elfnote.h> + +ELFNOTE_START(Linux, 0, "a") + .long LINUX_VERSION_CODE +ELFNOTE_END diff --git a/arch/nds32/kernel/vdso/sigreturn.S b/arch/nds32/kernel/vdso/sigreturn.S new file mode 100644 index 000000000..67e4d1d16 --- /dev/null +++ b/arch/nds32/kernel/vdso/sigreturn.S @@ -0,0 +1,19 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2012 ARM Limited +// Copyright (C) 2005-2017 Andes Technology Corporation + +#include <linux/linkage.h> +#include <asm/unistd.h> + + .text + +ENTRY(__kernel_rt_sigreturn) + .cfi_startproc + movi $r15, __NR_rt_sigreturn + /* + * The SWID of syscall should be __NR_rt_sigreturn to synchronize + * the unwinding scheme in gcc + */ + syscall __NR_rt_sigreturn + .cfi_endproc +ENDPROC(__kernel_rt_sigreturn) diff --git a/arch/nds32/kernel/vdso/vdso.S b/arch/nds32/kernel/vdso/vdso.S new file mode 100644 index 000000000..16737c11e --- /dev/null +++ b/arch/nds32/kernel/vdso/vdso.S @@ -0,0 +1,18 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2012 ARM Limited +// Copyright (C) 2005-2017 Andes Technology Corporation + +#include <linux/init.h> +#include <linux/linkage.h> +#include <linux/const.h> +#include <asm/page.h> + + .globl vdso_start, vdso_end + .section .rodata + .balign PAGE_SIZE +vdso_start: + .incbin "arch/nds32/kernel/vdso/vdso.so" + .balign PAGE_SIZE +vdso_end: + + .previous diff --git a/arch/nds32/kernel/vdso/vdso.lds.S b/arch/nds32/kernel/vdso/vdso.lds.S new file mode 100644 index 000000000..1f2b16004 --- /dev/null +++ b/arch/nds32/kernel/vdso/vdso.lds.S @@ -0,0 +1,75 @@ +/* + * SPDX-License-Identifier: GPL-2.0 + * Copyright (C) 2005-2017 Andes Technology Corporation + */ + + +#include <linux/const.h> +#include <asm/page.h> +#include <asm/vdso.h> + +OUTPUT_ARCH(nds32) + +SECTIONS +{ + . = SIZEOF_HEADERS; + + .hash : { *(.hash) } :text + .gnu.hash : { *(.gnu.hash) } + .dynsym : { *(.dynsym) } + .dynstr : { *(.dynstr) } + .gnu.version : { *(.gnu.version) } + .gnu.version_d : { *(.gnu.version_d) } + .gnu.version_r : { *(.gnu.version_r) } + + .note : { *(.note.*) } :text :note + + + .text : { *(.text*) } :text + + .eh_frame_hdr : { *(.eh_frame_hdr) } :text :eh_frame_hdr + .eh_frame : { KEEP (*(.eh_frame)) } :text + + .dynamic : { *(.dynamic) } :text :dynamic + + .rodata : { *(.rodata*) } :text + + + /DISCARD/ : { + *(.note.GNU-stack) + *(.data .data.* .gnu.linkonce.d.* .sdata*) + *(.bss .sbss .dynbss .dynsbss) + } +} + +/* + * We must supply the ELF program headers explicitly to get just one + * PT_LOAD segment, and set the flags explicitly to make segments read-only. + */ +PHDRS +{ + text PT_LOAD FLAGS(5) FILEHDR PHDRS; /* PF_R|PF_X */ + dynamic PT_DYNAMIC FLAGS(4); /* PF_R */ + note PT_NOTE FLAGS(4); /* PF_R */ + eh_frame_hdr PT_GNU_EH_FRAME; +} + +/* + * This controls what symbols we export from the DSO. + */ +VERSION +{ + LINUX_4 { + global: + __kernel_rt_sigreturn; + __vdso_gettimeofday; + __vdso_clock_getres; + __vdso_clock_gettime; + local: *; + }; +} + +/* + * Make the rt_sigreturn code visible to the kernel. + */ +VDSO_rt_sigtramp = __kernel_rt_sigreturn; diff --git a/arch/nds32/kernel/vmlinux.lds.S b/arch/nds32/kernel/vmlinux.lds.S new file mode 100644 index 000000000..9e90f30a1 --- /dev/null +++ b/arch/nds32/kernel/vmlinux.lds.S @@ -0,0 +1,69 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#include <asm/page.h> +#include <asm/thread_info.h> +#include <asm/cache.h> +#include <asm/memory.h> + +#define LOAD_OFFSET (PAGE_OFFSET - PHYS_OFFSET) +#include <asm-generic/vmlinux.lds.h> + +OUTPUT_ARCH(nds32) +ENTRY(_stext_lma) +jiffies = jiffies_64; + +#if defined(CONFIG_GCOV_KERNEL) +#define NDS32_EXIT_KEEP(x) x +#else +#define NDS32_EXIT_KEEP(x) +#endif + +SECTIONS +{ + _stext_lma = TEXTADDR - LOAD_OFFSET; + . = TEXTADDR; + __init_begin = .; + HEAD_TEXT_SECTION + .exit.text : { + NDS32_EXIT_KEEP(EXIT_TEXT) + } + INIT_TEXT_SECTION(PAGE_SIZE) + INIT_DATA_SECTION(16) + .exit.data : { + NDS32_EXIT_KEEP(EXIT_DATA) + } + PERCPU_SECTION(L1_CACHE_BYTES) + __init_end = .; + + . = ALIGN(PAGE_SIZE); + _stext = .; + /* Real text segment */ + .text : AT(ADDR(.text) - LOAD_OFFSET) { + _text = .; /* Text and read-only data */ + TEXT_TEXT + SCHED_TEXT + CPUIDLE_TEXT + LOCK_TEXT + KPROBES_TEXT + IRQENTRY_TEXT + *(.fixup) + } + + _etext = .; /* End of text and rodata section */ + + _sdata = .; + RO_DATA_SECTION(PAGE_SIZE) + RW_DATA_SECTION(L1_CACHE_BYTES, PAGE_SIZE, THREAD_SIZE) + _edata = .; + + EXCEPTION_TABLE(16) + NOTES + BSS_SECTION(4, 4, 4) + _end = .; + + STABS_DEBUG + DWARF_DEBUG + + DISCARDS +} diff --git a/arch/nds32/lib/Makefile b/arch/nds32/lib/Makefile new file mode 100644 index 000000000..0f9840103 --- /dev/null +++ b/arch/nds32/lib/Makefile @@ -0,0 +1,3 @@ +lib-y := copy_page.o memcpy.o memmove.o \ + memset.o memzero.o \ + copy_from_user.o copy_to_user.o clear_user.o diff --git a/arch/nds32/lib/clear_user.S b/arch/nds32/lib/clear_user.S new file mode 100644 index 000000000..805dfcd25 --- /dev/null +++ b/arch/nds32/lib/clear_user.S @@ -0,0 +1,42 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#include <linux/linkage.h> +#include <asm/assembler.h> +#include <asm/errno.h> + +/* Prototype: int __arch_clear_user(void *addr, size_t sz) + * Purpose : clear some user memory + * Params : addr - user memory address to clear + * : sz - number of bytes to clear + * Returns : number of bytes NOT cleared + */ + .text + .align 5 +ENTRY(__arch_clear_user) + add $r5, $r0, $r1 + beqz $r1, clear_exit + xor $p1, $p1, $p1 ! Use $p1=0 to clear mem + srli $p0, $r1, #2 ! $p0 = number of word to clear + andi $r1, $r1, #3 ! Bytes less than a word to copy + beqz $p0, byte_clear ! Only less than a word to clear +word_clear: +USER( smw.bim,$p1, [$r0], $p1) ! Clear the word + addi $p0, $p0, #-1 ! Decrease word count + bnez $p0, word_clear ! Continue looping to clear all words + beqz $r1, clear_exit ! No left bytes to copy +byte_clear: +USER( sbi.bi, $p1, [$r0], #1) ! Clear the byte + addi $r1, $r1, #-1 ! Decrease byte count + bnez $r1, byte_clear ! Continue looping to clear all left bytes +clear_exit: + move $r0, $r1 ! Set return value + ret + + .section .fixup,"ax" + .align 0 +9001: + sub $r0, $r5, $r0 ! Bytes left to copy + ret + .previous +ENDPROC(__arch_clear_user) diff --git a/arch/nds32/lib/copy_from_user.S b/arch/nds32/lib/copy_from_user.S new file mode 100644 index 000000000..ad1857b20 --- /dev/null +++ b/arch/nds32/lib/copy_from_user.S @@ -0,0 +1,45 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#include <linux/linkage.h> +#include <asm/assembler.h> +#include <asm/errno.h> + +.macro lbi1 dst, addr, adj +USER( lbi.bi, \dst, [\addr], \adj) +.endm + +.macro sbi1 src, addr, adj +sbi.bi \src, [\addr], \adj +.endm + +.macro lmw1 start_reg, addr, end_reg +USER( lmw.bim, \start_reg, [\addr], \end_reg) +.endm + +.macro smw1 start_reg, addr, end_reg +smw.bim \start_reg, [\addr], \end_reg +.endm + + +/* Prototype: int __arch_copy_from_user(void *to, const char *from, size_t n) + * Purpose : copy a block from user memory to kernel memory + * Params : to - kernel memory + * : from - user memory + * : n - number of bytes to copy + * Returns : Number of bytes NOT copied. + */ + +.text +ENTRY(__arch_copy_from_user) + add $r5, $r0, $r2 +#include "copy_template.S" + move $r0, $r2 + ret +.section .fixup,"ax" +.align 2 +9001: + sub $r0, $r5, $r0 + ret +.previous +ENDPROC(__arch_copy_from_user) diff --git a/arch/nds32/lib/copy_page.S b/arch/nds32/lib/copy_page.S new file mode 100644 index 000000000..f8701ed16 --- /dev/null +++ b/arch/nds32/lib/copy_page.S @@ -0,0 +1,40 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#include <linux/linkage.h> +#include <asm/export.h> +#include <asm/page.h> + + .text +ENTRY(copy_page) + pushm $r2, $r10 + movi $r2, PAGE_SIZE >> 5 +.Lcopy_loop: + lmw.bim $r3, [$r1], $r10 + smw.bim $r3, [$r0], $r10 + subi45 $r2, #1 + bnez38 $r2, .Lcopy_loop + popm $r2, $r10 + ret +ENDPROC(copy_page) +EXPORT_SYMBOL(copy_page) + +ENTRY(clear_page) + pushm $r1, $r9 + movi $r1, PAGE_SIZE >> 5 + movi55 $r2, #0 + movi55 $r3, #0 + movi55 $r4, #0 + movi55 $r5, #0 + movi55 $r6, #0 + movi55 $r7, #0 + movi55 $r8, #0 + movi55 $r9, #0 +.Lclear_loop: + smw.bim $r2, [$r0], $r9 + subi45 $r1, #1 + bnez38 $r1, .Lclear_loop + popm $r1, $r9 + ret +ENDPROC(clear_page) +EXPORT_SYMBOL(clear_page) diff --git a/arch/nds32/lib/copy_template.S b/arch/nds32/lib/copy_template.S new file mode 100644 index 000000000..3a9a2de46 --- /dev/null +++ b/arch/nds32/lib/copy_template.S @@ -0,0 +1,69 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + + + beq $r1, $r0, quit_memcpy + beqz $r2, quit_memcpy + srli $r3, $r2, #5 ! check if len < cache-line size 32 + beqz $r3, word_copy_entry + andi $r4, $r0, #0x3 ! check byte-align + beqz $r4, unalign_word_copy_entry + + addi $r4, $r4,#-4 + abs $r4, $r4 ! check how many un-align byte to copy + sub $r2, $r2, $r4 ! update $R2 + +unalign_byte_copy: + lbi1 $r3, $r1, #1 + addi $r4, $r4, #-1 + sbi1 $r3, $r0, #1 + bnez $r4, unalign_byte_copy + beqz $r2, quit_memcpy + +unalign_word_copy_entry: + andi $r3, $r0, 0x1f ! check cache-line unaligncount + beqz $r3, cache_copy + + addi $r3, $r3, #-32 + abs $r3, $r3 + sub $r2, $r2, $r3 ! update $R2 + +unalign_word_copy: + lmw1 $r4, $r1, $r4 + addi $r3, $r3, #-4 + smw1 $r4, $r0, $r4 + bnez $r3, unalign_word_copy + beqz $r2, quit_memcpy + + addi $r3, $r2, #-32 ! to check $r2< cache_line , than go to word_copy + bltz $r3, word_copy_entry +cache_copy: + srli $r3, $r2, #5 + beqz $r3, word_copy_entry +3: + lmw1 $r17, $r1, $r24 + addi $r3, $r3, #-1 + smw1 $r17, $r0, $r24 + bnez $r3, 3b + +word_copy_entry: + andi $r2, $r2, #31 + + beqz $r2, quit_memcpy +5: + srli $r3, $r2, #2 + beqz $r3, byte_copy +word_copy: + lmw1 $r4, $r1, $r4 + addi $r3, $r3, #-1 + smw1 $r4, $r0, $r4 + bnez $r3, word_copy + andi $r2, $r2, #3 + beqz $r2, quit_memcpy +byte_copy: + lbi1 $r3, $r1, #1 + addi $r2, $r2, #-1 + + sbi1 $r3, $r0, #1 + bnez $r2, byte_copy +quit_memcpy: diff --git a/arch/nds32/lib/copy_to_user.S b/arch/nds32/lib/copy_to_user.S new file mode 100644 index 000000000..3230044dc --- /dev/null +++ b/arch/nds32/lib/copy_to_user.S @@ -0,0 +1,45 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#include <linux/linkage.h> +#include <asm/assembler.h> +#include <asm/errno.h> + +.macro lbi1 dst, addr, adj +lbi.bi \dst, [\addr], \adj +.endm + +.macro sbi1 src, addr, adj +USER( sbi.bi, \src, [\addr], \adj) +.endm + +.macro lmw1 start_reg, addr, end_reg +lmw.bim \start_reg, [\addr], \end_reg +.endm + +.macro smw1 start_reg, addr, end_reg +USER( smw.bim, \start_reg, [\addr], \end_reg) +.endm + + +/* Prototype: int __arch_copy_to_user(void *to, const char *from, size_t n) + * Purpose : copy a block to user memory from kernel memory + * Params : to - user memory + * : from - kernel memory + * : n - number of bytes to copy + * Returns : Number of bytes NOT copied. + */ + +.text +ENTRY(__arch_copy_to_user) + add $r5, $r0, $r2 +#include "copy_template.S" + move $r0, $r2 + ret +.section .fixup,"ax" +.align 2 +9001: + sub $r0, $r5, $r0 + ret +.previous +ENDPROC(__arch_copy_to_user) diff --git a/arch/nds32/lib/memcpy.S b/arch/nds32/lib/memcpy.S new file mode 100644 index 000000000..a2345ea72 --- /dev/null +++ b/arch/nds32/lib/memcpy.S @@ -0,0 +1,30 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#include <linux/linkage.h> + + +.macro lbi1 dst, addr, adj +lbi.bi \dst, [\addr], \adj +.endm + +.macro sbi1 src, addr, adj +sbi.bi \src, [\addr], \adj +.endm + +.macro lmw1 start_reg, addr, end_reg +lmw.bim \start_reg, [\addr], \end_reg +.endm + +.macro smw1 start_reg, addr, end_reg +smw.bim \start_reg, [\addr], \end_reg +.endm + +.text +ENTRY(memcpy) + move $r5, $r0 +#include "copy_template.S" + move $r0, $r5 + ret + +ENDPROC(memcpy) diff --git a/arch/nds32/lib/memmove.S b/arch/nds32/lib/memmove.S new file mode 100644 index 000000000..c823aada2 --- /dev/null +++ b/arch/nds32/lib/memmove.S @@ -0,0 +1,70 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#include <linux/linkage.h> + +/* + void *memmove(void *dst, const void *src, int n); + + dst: $r0 + src: $r1 + n : $r2 + ret: $r0 - pointer to the memory area dst. +*/ + .text + +ENTRY(memmove) + move $r5, $r0 ! Set return value = det + beq $r0, $r1, exit_memcpy ! Exit when det = src + beqz $r2, exit_memcpy ! Exit when n = 0 + pushm $t0, $t1 ! Save reg + srli $p1, $r2, #2 ! $p1 is how many words to copy + + ! Avoid data lost when memory overlap + ! Copy data reversely when src < dst + slt $p0, $r0, $r1 ! check if $r0 < $r1 + beqz $p0, do_reverse ! branch if dst > src + + ! No reverse, dst < src + andi $r2, $r2, #3 ! How many bytes are less than a word + li $t0, #1 ! Determining copy direction in byte_cpy + beqz $p1, byte_cpy ! When n is less than a word + +word_cpy: + lmw.bim $p0, [$r1], $p0 ! Read a word from src + addi $p1, $p1, #-1 ! How many words left to copy + smw.bim $p0, [$r0], $p0 ! Copy the word to det + bnez $p1, word_cpy ! If remained words > 0 + beqz $r2, end_memcpy ! No left bytes to copy + b byte_cpy + +do_reverse: + add $r0, $r0, $r2 ! Start with the end of $r0 + add $r1, $r1, $r2 ! Start with the end of $r1 + andi $r2, $r2, #3 ! How many bytes are less than a word + li $t0, #-1 ! Determining copy direction in byte_cpy + beqz $p1, reverse_byte_cpy ! When n is less than a word + +reverse_word_cpy: + lmw.adm $p0, [$r1], $p0 ! Read a word from src + addi $p1, $p1, #-1 ! How many words left to copy + smw.adm $p0, [$r0], $p0 ! Copy the word to det + bnez $p1, reverse_word_cpy ! If remained words > 0 + beqz $r2, end_memcpy ! No left bytes to copy + +reverse_byte_cpy: + addi $r0, $r0, #-1 + addi $r1, $r1, #-1 +byte_cpy: ! Less than 4 bytes to copy now + lb.bi $p0, [$r1], $t0 ! Read a byte from src + addi $r2, $r2, #-1 ! How many bytes left to copy + sb.bi $p0, [$r0], $t0 ! copy the byte to det + bnez $r2, byte_cpy ! If remained bytes > 0 + +end_memcpy: + popm $t0, $t1 +exit_memcpy: + move $r0, $r5 + ret + +ENDPROC(memmove) diff --git a/arch/nds32/lib/memset.S b/arch/nds32/lib/memset.S new file mode 100644 index 000000000..193cb6ce2 --- /dev/null +++ b/arch/nds32/lib/memset.S @@ -0,0 +1,33 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#include <linux/linkage.h> + + .text +ENTRY(memset) + move $r5, $r0 ! Return value + beqz $r2, end_memset ! Exit when len = 0 + srli $p1, $r2, 2 ! $p1 is how many words to copy + andi $r2, $r2, 3 ! How many bytes are less than a word + beqz $p1, byte_set ! When n is less than a word + + ! set $r1 from ??????ab to abababab + andi $r1, $r1, #0x00ff ! $r1 = 000000ab + slli $p0, $r1, #8 ! $p0 = 0000ab00 + or $r1, $r1, $p0 ! $r1 = 0000abab + slli $p0, $r1, #16 ! $p0 = abab0000 + or $r1, $r1, $p0 ! $r1 = abababab +word_set: + addi $p1, $p1, #-1 ! How many words left to copy + smw.bim $r1, [$r0], $r1 ! Copy the word to det + bnez $p1, word_set ! Still words to set, continue looping + beqz $r2, end_memset ! No left byte to set +byte_set: ! Less than 4 bytes left to set + addi $r2, $r2, #-1 ! Decrease len by 1 + sbi.bi $r1, [$r0], #1 ! Set data of the next byte to $r1 + bnez $r2, byte_set ! Still bytes left to set +end_memset: + move $r0, $r5 + ret + +ENDPROC(memset) diff --git a/arch/nds32/lib/memzero.S b/arch/nds32/lib/memzero.S new file mode 100644 index 000000000..f055972c9 --- /dev/null +++ b/arch/nds32/lib/memzero.S @@ -0,0 +1,18 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#include <linux/linkage.h> + + .text +ENTRY(memzero) + beqz $r1, 1f + push $lp + move $r2, $r1 + move $r1, #0 + push $r0 + bal memset + pop $r0 + pop $lp +1: + ret +ENDPROC(memzero) diff --git a/arch/nds32/mm/Makefile b/arch/nds32/mm/Makefile new file mode 100644 index 000000000..7c5c15ad8 --- /dev/null +++ b/arch/nds32/mm/Makefile @@ -0,0 +1,11 @@ +obj-y := extable.o tlb.o \ + fault.o init.o ioremap.o mmap.o \ + mm-nds32.o cacheflush.o proc.o + +obj-$(CONFIG_ALIGNMENT_TRAP) += alignment.o +obj-$(CONFIG_HIGHMEM) += highmem.o + +ifdef CONFIG_FUNCTION_TRACER +CFLAGS_REMOVE_proc.o = $(CC_FLAGS_FTRACE) +endif +CFLAGS_proc.o += -fomit-frame-pointer diff --git a/arch/nds32/mm/alignment.c b/arch/nds32/mm/alignment.c new file mode 100644 index 000000000..e1aed9dc6 --- /dev/null +++ b/arch/nds32/mm/alignment.c @@ -0,0 +1,579 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#include <linux/proc_fs.h> +#include <linux/uaccess.h> +#include <linux/sysctl.h> +#include <asm/unaligned.h> + +#define DEBUG(enable, tagged, ...) \ + do{ \ + if (enable) { \ + if (tagged) \ + pr_warn("[ %30s() ] ", __func__); \ + pr_warn(__VA_ARGS__); \ + } \ + } while (0) + +#define RT(inst) (((inst) >> 20) & 0x1FUL) +#define RA(inst) (((inst) >> 15) & 0x1FUL) +#define RB(inst) (((inst) >> 10) & 0x1FUL) +#define SV(inst) (((inst) >> 8) & 0x3UL) +#define IMM(inst) (((inst) >> 0) & 0x7FFFUL) + +#define RA3(inst) (((inst) >> 3) & 0x7UL) +#define RT3(inst) (((inst) >> 6) & 0x7UL) +#define IMM3U(inst) (((inst) >> 0) & 0x7UL) + +#define RA5(inst) (((inst) >> 0) & 0x1FUL) +#define RT4(inst) (((inst) >> 5) & 0xFUL) + +#define GET_IMMSVAL(imm_value) \ + (((imm_value >> 14) & 0x1) ? (imm_value - 0x8000) : imm_value) + +#define __get8_data(val,addr,err) \ + __asm__( \ + "1: lbi.bi %1, [%2], #1\n" \ + "2:\n" \ + " .pushsection .text.fixup,\"ax\"\n" \ + " .align 2\n" \ + "3: movi %0, #1\n" \ + " j 2b\n" \ + " .popsection\n" \ + " .pushsection __ex_table,\"a\"\n" \ + " .align 3\n" \ + " .long 1b, 3b\n" \ + " .popsection\n" \ + : "=r" (err), "=&r" (val), "=r" (addr) \ + : "0" (err), "2" (addr)) + +#define get16_data(addr, val_ptr) \ + do { \ + unsigned int err = 0, v, a = addr; \ + __get8_data(v,a,err); \ + *val_ptr = v << 0; \ + __get8_data(v,a,err); \ + *val_ptr |= v << 8; \ + if (err) \ + goto fault; \ + *val_ptr = le16_to_cpu(*val_ptr); \ + } while(0) + +#define get32_data(addr, val_ptr) \ + do { \ + unsigned int err = 0, v, a = addr; \ + __get8_data(v,a,err); \ + *val_ptr = v << 0; \ + __get8_data(v,a,err); \ + *val_ptr |= v << 8; \ + __get8_data(v,a,err); \ + *val_ptr |= v << 16; \ + __get8_data(v,a,err); \ + *val_ptr |= v << 24; \ + if (err) \ + goto fault; \ + *val_ptr = le32_to_cpu(*val_ptr); \ + } while(0) + +#define get_data(addr, val_ptr, len) \ + if (len == 2) \ + get16_data(addr, val_ptr); \ + else \ + get32_data(addr, val_ptr); + +#define set16_data(addr, val) \ + do { \ + unsigned int err = 0, *ptr = addr ; \ + val = le32_to_cpu(val); \ + __asm__( \ + "1: sbi.bi %2, [%1], #1\n" \ + " srli %2, %2, #8\n" \ + "2: sbi %2, [%1]\n" \ + "3:\n" \ + " .pushsection .text.fixup,\"ax\"\n" \ + " .align 2\n" \ + "4: movi %0, #1\n" \ + " j 3b\n" \ + " .popsection\n" \ + " .pushsection __ex_table,\"a\"\n" \ + " .align 3\n" \ + " .long 1b, 4b\n" \ + " .long 2b, 4b\n" \ + " .popsection\n" \ + : "=r" (err), "+r" (ptr), "+r" (val) \ + : "0" (err) \ + ); \ + if (err) \ + goto fault; \ + } while(0) + +#define set32_data(addr, val) \ + do { \ + unsigned int err = 0, *ptr = addr ; \ + val = le32_to_cpu(val); \ + __asm__( \ + "1: sbi.bi %2, [%1], #1\n" \ + " srli %2, %2, #8\n" \ + "2: sbi.bi %2, [%1], #1\n" \ + " srli %2, %2, #8\n" \ + "3: sbi.bi %2, [%1], #1\n" \ + " srli %2, %2, #8\n" \ + "4: sbi %2, [%1]\n" \ + "5:\n" \ + " .pushsection .text.fixup,\"ax\"\n" \ + " .align 2\n" \ + "6: movi %0, #1\n" \ + " j 5b\n" \ + " .popsection\n" \ + " .pushsection __ex_table,\"a\"\n" \ + " .align 3\n" \ + " .long 1b, 6b\n" \ + " .long 2b, 6b\n" \ + " .long 3b, 6b\n" \ + " .long 4b, 6b\n" \ + " .popsection\n" \ + : "=r" (err), "+r" (ptr), "+r" (val) \ + : "0" (err) \ + ); \ + if (err) \ + goto fault; \ + } while(0) +#define set_data(addr, val, len) \ + if (len == 2) \ + set16_data(addr, val); \ + else \ + set32_data(addr, val); +#define NDS32_16BIT_INSTRUCTION 0x80000000 + +extern pte_t va_present(struct mm_struct *mm, unsigned long addr); +extern pte_t va_kernel_present(unsigned long addr); +extern int va_readable(struct pt_regs *regs, unsigned long addr); +extern int va_writable(struct pt_regs *regs, unsigned long addr); + +int unalign_access_mode = 0, unalign_access_debug = 0; + +static inline unsigned long *idx_to_addr(struct pt_regs *regs, int idx) +{ + /* this should be consistent with ptrace.h */ + if (idx >= 0 && idx <= 25) /* R0-R25 */ + return ®s->uregs[0] + idx; + else if (idx >= 28 && idx <= 30) /* FP, GP, LP */ + return ®s->fp + (idx - 28); + else if (idx == 31) /* SP */ + return ®s->sp; + else + return NULL; /* cause a segfault */ +} + +static inline unsigned long get_inst(unsigned long addr) +{ + return be32_to_cpu(get_unaligned((u32 *) addr)); +} + +static inline unsigned long sign_extend(unsigned long val, int len) +{ + unsigned long ret = 0; + unsigned char *s, *t; + int i = 0; + + val = cpu_to_le32(val); + + s = (void *)&val; + t = (void *)&ret; + + while (i++ < len) + *t++ = *s++; + + if (((*(t - 1)) & 0x80) && (i < 4)) { + + while (i++ <= 4) + *t++ = 0xff; + } + + return le32_to_cpu(ret); +} + +static inline int do_16(unsigned long inst, struct pt_regs *regs) +{ + int imm, regular, load, len, addr_mode, idx_mode; + unsigned long unaligned_addr, target_val, source_idx, target_idx, + shift = 0; + switch ((inst >> 9) & 0x3F) { + + case 0x12: /* LHI333 */ + imm = 1; + regular = 1; + load = 1; + len = 2; + addr_mode = 3; + idx_mode = 3; + break; + case 0x10: /* LWI333 */ + imm = 1; + regular = 1; + load = 1; + len = 4; + addr_mode = 3; + idx_mode = 3; + break; + case 0x11: /* LWI333.bi */ + imm = 1; + regular = 0; + load = 1; + len = 4; + addr_mode = 3; + idx_mode = 3; + break; + case 0x1A: /* LWI450 */ + imm = 0; + regular = 1; + load = 1; + len = 4; + addr_mode = 5; + idx_mode = 4; + break; + case 0x16: /* SHI333 */ + imm = 1; + regular = 1; + load = 0; + len = 2; + addr_mode = 3; + idx_mode = 3; + break; + case 0x14: /* SWI333 */ + imm = 1; + regular = 1; + load = 0; + len = 4; + addr_mode = 3; + idx_mode = 3; + break; + case 0x15: /* SWI333.bi */ + imm = 1; + regular = 0; + load = 0; + len = 4; + addr_mode = 3; + idx_mode = 3; + break; + case 0x1B: /* SWI450 */ + imm = 0; + regular = 1; + load = 0; + len = 4; + addr_mode = 5; + idx_mode = 4; + break; + + default: + return -EFAULT; + } + + if (addr_mode == 3) { + unaligned_addr = *idx_to_addr(regs, RA3(inst)); + source_idx = RA3(inst); + } else { + unaligned_addr = *idx_to_addr(regs, RA5(inst)); + source_idx = RA5(inst); + } + + if (idx_mode == 3) + target_idx = RT3(inst); + else + target_idx = RT4(inst); + + if (imm) + shift = IMM3U(inst) * len; + + if (regular) + unaligned_addr += shift; + + if (load) { + if (!access_ok(VERIFY_READ, (void *)unaligned_addr, len)) + return -EACCES; + + get_data(unaligned_addr, &target_val, len); + *idx_to_addr(regs, target_idx) = target_val; + } else { + if (!access_ok(VERIFY_WRITE, (void *)unaligned_addr, len)) + return -EACCES; + target_val = *idx_to_addr(regs, target_idx); + set_data((void *)unaligned_addr, target_val, len); + } + + if (!regular) + *idx_to_addr(regs, source_idx) = unaligned_addr + shift; + regs->ipc += 2; + + return 0; +fault: + return -EACCES; +} + +static inline int do_32(unsigned long inst, struct pt_regs *regs) +{ + int imm, regular, load, len, sign_ext; + unsigned long unaligned_addr, target_val, shift; + + unaligned_addr = *idx_to_addr(regs, RA(inst)); + + switch ((inst >> 25) << 1) { + + case 0x02: /* LHI */ + imm = 1; + regular = 1; + load = 1; + len = 2; + sign_ext = 0; + break; + case 0x0A: /* LHI.bi */ + imm = 1; + regular = 0; + load = 1; + len = 2; + sign_ext = 0; + break; + case 0x22: /* LHSI */ + imm = 1; + regular = 1; + load = 1; + len = 2; + sign_ext = 1; + break; + case 0x2A: /* LHSI.bi */ + imm = 1; + regular = 0; + load = 1; + len = 2; + sign_ext = 1; + break; + case 0x04: /* LWI */ + imm = 1; + regular = 1; + load = 1; + len = 4; + sign_ext = 0; + break; + case 0x0C: /* LWI.bi */ + imm = 1; + regular = 0; + load = 1; + len = 4; + sign_ext = 0; + break; + case 0x12: /* SHI */ + imm = 1; + regular = 1; + load = 0; + len = 2; + sign_ext = 0; + break; + case 0x1A: /* SHI.bi */ + imm = 1; + regular = 0; + load = 0; + len = 2; + sign_ext = 0; + break; + case 0x14: /* SWI */ + imm = 1; + regular = 1; + load = 0; + len = 4; + sign_ext = 0; + break; + case 0x1C: /* SWI.bi */ + imm = 1; + regular = 0; + load = 0; + len = 4; + sign_ext = 0; + break; + + default: + switch (inst & 0xff) { + + case 0x01: /* LH */ + imm = 0; + regular = 1; + load = 1; + len = 2; + sign_ext = 0; + break; + case 0x05: /* LH.bi */ + imm = 0; + regular = 0; + load = 1; + len = 2; + sign_ext = 0; + break; + case 0x11: /* LHS */ + imm = 0; + regular = 1; + load = 1; + len = 2; + sign_ext = 1; + break; + case 0x15: /* LHS.bi */ + imm = 0; + regular = 0; + load = 1; + len = 2; + sign_ext = 1; + break; + case 0x02: /* LW */ + imm = 0; + regular = 1; + load = 1; + len = 4; + sign_ext = 0; + break; + case 0x06: /* LW.bi */ + imm = 0; + regular = 0; + load = 1; + len = 4; + sign_ext = 0; + break; + case 0x09: /* SH */ + imm = 0; + regular = 1; + load = 0; + len = 2; + sign_ext = 0; + break; + case 0x0D: /* SH.bi */ + imm = 0; + regular = 0; + load = 0; + len = 2; + sign_ext = 0; + break; + case 0x0A: /* SW */ + imm = 0; + regular = 1; + load = 0; + len = 4; + sign_ext = 0; + break; + case 0x0E: /* SW.bi */ + imm = 0; + regular = 0; + load = 0; + len = 4; + sign_ext = 0; + break; + + default: + return -EFAULT; + } + } + + if (imm) + shift = GET_IMMSVAL(IMM(inst)) * len; + else + shift = *idx_to_addr(regs, RB(inst)) << SV(inst); + + if (regular) + unaligned_addr += shift; + + if (load) { + + if (!access_ok(VERIFY_READ, (void *)unaligned_addr, len)) + return -EACCES; + + get_data(unaligned_addr, &target_val, len); + + if (sign_ext) + *idx_to_addr(regs, RT(inst)) = + sign_extend(target_val, len); + else + *idx_to_addr(regs, RT(inst)) = target_val; + } else { + + if (!access_ok(VERIFY_WRITE, (void *)unaligned_addr, len)) + return -EACCES; + + target_val = *idx_to_addr(regs, RT(inst)); + set_data((void *)unaligned_addr, target_val, len); + } + + if (!regular) + *idx_to_addr(regs, RA(inst)) = unaligned_addr + shift; + + regs->ipc += 4; + + return 0; +fault: + return -EACCES; +} + +int do_unaligned_access(unsigned long addr, struct pt_regs *regs) +{ + unsigned long inst; + int ret = -EFAULT; + mm_segment_t seg = get_fs(); + + inst = get_inst(regs->ipc); + + DEBUG((unalign_access_debug > 0), 1, + "Faulting addr: 0x%08lx, pc: 0x%08lx [inst: 0x%08lx ]\n", addr, + regs->ipc, inst); + + set_fs(USER_DS); + + if (inst & NDS32_16BIT_INSTRUCTION) + ret = do_16((inst >> 16) & 0xffff, regs); + else + ret = do_32(inst, regs); + set_fs(seg); + + return ret; +} + +#ifdef CONFIG_PROC_FS + +static struct ctl_table alignment_tbl[3] = { + { + .procname = "enable", + .data = &unalign_access_mode, + .maxlen = sizeof(unalign_access_mode), + .mode = 0666, + .proc_handler = &proc_dointvec + } + , + { + .procname = "debug_info", + .data = &unalign_access_debug, + .maxlen = sizeof(unalign_access_debug), + .mode = 0644, + .proc_handler = &proc_dointvec + } + , + {} +}; + +static struct ctl_table nds32_sysctl_table[2] = { + { + .procname = "unaligned_access", + .mode = 0555, + .child = alignment_tbl}, + {} +}; + +static struct ctl_path nds32_path[2] = { + {.procname = "nds32"}, + {} +}; + +/* + * Initialize nds32 alignment-correction interface + */ +static int __init nds32_sysctl_init(void) +{ + register_sysctl_paths(nds32_path, nds32_sysctl_table); + return 0; +} + +__initcall(nds32_sysctl_init); +#endif /* CONFIG_PROC_FS */ diff --git a/arch/nds32/mm/cacheflush.c b/arch/nds32/mm/cacheflush.c new file mode 100644 index 000000000..f34dc9bc6 --- /dev/null +++ b/arch/nds32/mm/cacheflush.c @@ -0,0 +1,348 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#include <linux/mm.h> +#include <linux/sched.h> +#include <linux/fs.h> +#include <linux/pagemap.h> +#include <linux/module.h> +#include <asm/cacheflush.h> +#include <asm/proc-fns.h> +#include <asm/shmparam.h> +#include <asm/cache_info.h> + +extern struct cache_info L1_cache_info[2]; + +void flush_icache_range(unsigned long start, unsigned long end) +{ + unsigned long line_size, flags; + line_size = L1_cache_info[DCACHE].line_size; + start = start & ~(line_size - 1); + end = (end + line_size - 1) & ~(line_size - 1); + local_irq_save(flags); + cpu_cache_wbinval_range(start, end, 1); + local_irq_restore(flags); +} +EXPORT_SYMBOL(flush_icache_range); + +void flush_icache_page(struct vm_area_struct *vma, struct page *page) +{ + unsigned long flags; + unsigned long kaddr; + local_irq_save(flags); + kaddr = (unsigned long)kmap_atomic(page); + cpu_cache_wbinval_page(kaddr, vma->vm_flags & VM_EXEC); + kunmap_atomic((void *)kaddr); + local_irq_restore(flags); +} +EXPORT_SYMBOL(flush_icache_page); + +void flush_icache_user_range(struct vm_area_struct *vma, struct page *page, + unsigned long addr, int len) +{ + unsigned long kaddr; + kaddr = (unsigned long)kmap_atomic(page) + (addr & ~PAGE_MASK); + flush_icache_range(kaddr, kaddr + len); + kunmap_atomic((void *)kaddr); +} + +void update_mmu_cache(struct vm_area_struct *vma, unsigned long addr, + pte_t * pte) +{ + struct page *page; + unsigned long pfn = pte_pfn(*pte); + unsigned long flags; + + if (!pfn_valid(pfn)) + return; + + if (vma->vm_mm == current->active_mm) { + local_irq_save(flags); + __nds32__mtsr_dsb(addr, NDS32_SR_TLB_VPN); + __nds32__tlbop_rwr(*pte); + __nds32__isb(); + local_irq_restore(flags); + } + page = pfn_to_page(pfn); + + if ((test_and_clear_bit(PG_dcache_dirty, &page->flags)) || + (vma->vm_flags & VM_EXEC)) { + unsigned long kaddr; + local_irq_save(flags); + kaddr = (unsigned long)kmap_atomic(page); + cpu_cache_wbinval_page(kaddr, vma->vm_flags & VM_EXEC); + kunmap_atomic((void *)kaddr); + local_irq_restore(flags); + } +} +#ifdef CONFIG_CPU_CACHE_ALIASING +extern pte_t va_present(struct mm_struct *mm, unsigned long addr); + +static inline unsigned long aliasing(unsigned long addr, unsigned long page) +{ + return ((addr & PAGE_MASK) ^ page) & (SHMLBA - 1); +} + +static inline unsigned long kremap0(unsigned long uaddr, unsigned long pa) +{ + unsigned long kaddr, pte; + +#define BASE_ADDR0 0xffffc000 + kaddr = BASE_ADDR0 | (uaddr & L1_cache_info[DCACHE].aliasing_mask); + pte = (pa | PAGE_KERNEL); + __nds32__mtsr_dsb(kaddr, NDS32_SR_TLB_VPN); + __nds32__tlbop_rwlk(pte); + __nds32__isb(); + return kaddr; +} + +static inline void kunmap01(unsigned long kaddr) +{ + __nds32__tlbop_unlk(kaddr); + __nds32__tlbop_inv(kaddr); + __nds32__isb(); +} + +static inline unsigned long kremap1(unsigned long uaddr, unsigned long pa) +{ + unsigned long kaddr, pte; + +#define BASE_ADDR1 0xffff8000 + kaddr = BASE_ADDR1 | (uaddr & L1_cache_info[DCACHE].aliasing_mask); + pte = (pa | PAGE_KERNEL); + __nds32__mtsr_dsb(kaddr, NDS32_SR_TLB_VPN); + __nds32__tlbop_rwlk(pte); + __nds32__isb(); + return kaddr; +} + +void flush_cache_mm(struct mm_struct *mm) +{ + unsigned long flags; + + local_irq_save(flags); + cpu_dcache_wbinval_all(); + cpu_icache_inval_all(); + local_irq_restore(flags); +} + +void flush_cache_dup_mm(struct mm_struct *mm) +{ +} + +void flush_cache_range(struct vm_area_struct *vma, + unsigned long start, unsigned long end) +{ + unsigned long flags; + + if ((end - start) > 8 * PAGE_SIZE) { + cpu_dcache_wbinval_all(); + if (vma->vm_flags & VM_EXEC) + cpu_icache_inval_all(); + return; + } + local_irq_save(flags); + while (start < end) { + if (va_present(vma->vm_mm, start)) + cpu_cache_wbinval_page(start, vma->vm_flags & VM_EXEC); + start += PAGE_SIZE; + } + local_irq_restore(flags); + return; +} + +void flush_cache_page(struct vm_area_struct *vma, + unsigned long addr, unsigned long pfn) +{ + unsigned long vto, flags; + + local_irq_save(flags); + vto = kremap0(addr, pfn << PAGE_SHIFT); + cpu_cache_wbinval_page(vto, vma->vm_flags & VM_EXEC); + kunmap01(vto); + local_irq_restore(flags); +} + +void flush_cache_vmap(unsigned long start, unsigned long end) +{ + cpu_dcache_wbinval_all(); + cpu_icache_inval_all(); +} + +void flush_cache_vunmap(unsigned long start, unsigned long end) +{ + cpu_dcache_wbinval_all(); + cpu_icache_inval_all(); +} + +void copy_user_page(void *vto, void *vfrom, unsigned long vaddr, + struct page *to) +{ + cpu_dcache_wbinval_page((unsigned long)vaddr); + cpu_icache_inval_page((unsigned long)vaddr); + copy_page(vto, vfrom); + cpu_dcache_wbinval_page((unsigned long)vto); + cpu_icache_inval_page((unsigned long)vto); +} + +void clear_user_page(void *addr, unsigned long vaddr, struct page *page) +{ + cpu_dcache_wbinval_page((unsigned long)vaddr); + cpu_icache_inval_page((unsigned long)vaddr); + clear_page(addr); + cpu_dcache_wbinval_page((unsigned long)addr); + cpu_icache_inval_page((unsigned long)addr); +} + +void copy_user_highpage(struct page *to, struct page *from, + unsigned long vaddr, struct vm_area_struct *vma) +{ + unsigned long vto, vfrom, flags, kto, kfrom, pfrom, pto; + kto = ((unsigned long)page_address(to) & PAGE_MASK); + kfrom = ((unsigned long)page_address(from) & PAGE_MASK); + pto = page_to_phys(to); + pfrom = page_to_phys(from); + + local_irq_save(flags); + if (aliasing(vaddr, (unsigned long)kfrom)) + cpu_dcache_wb_page((unsigned long)kfrom); + vto = kremap0(vaddr, pto); + vfrom = kremap1(vaddr, pfrom); + copy_page((void *)vto, (void *)vfrom); + kunmap01(vfrom); + kunmap01(vto); + local_irq_restore(flags); +} + +EXPORT_SYMBOL(copy_user_highpage); + +void clear_user_highpage(struct page *page, unsigned long vaddr) +{ + unsigned long vto, flags, kto; + + kto = ((unsigned long)page_address(page) & PAGE_MASK); + + local_irq_save(flags); + if (aliasing(kto, vaddr) && kto != 0) { + cpu_dcache_inval_page(kto); + cpu_icache_inval_page(kto); + } + vto = kremap0(vaddr, page_to_phys(page)); + clear_page((void *)vto); + kunmap01(vto); + local_irq_restore(flags); +} + +EXPORT_SYMBOL(clear_user_highpage); + +void flush_dcache_page(struct page *page) +{ + struct address_space *mapping; + + mapping = page_mapping_file(page); + if (mapping && !mapping_mapped(mapping)) + set_bit(PG_dcache_dirty, &page->flags); + else { + unsigned long kaddr, flags; + + kaddr = (unsigned long)page_address(page); + local_irq_save(flags); + cpu_dcache_wbinval_page(kaddr); + if (mapping) { + unsigned long vaddr, kto; + + vaddr = page->index << PAGE_SHIFT; + if (aliasing(vaddr, kaddr)) { + kto = kremap0(vaddr, page_to_phys(page)); + cpu_dcache_wbinval_page(kto); + kunmap01(kto); + } + } + local_irq_restore(flags); + } +} +EXPORT_SYMBOL(flush_dcache_page); + +void copy_to_user_page(struct vm_area_struct *vma, struct page *page, + unsigned long vaddr, void *dst, void *src, int len) +{ + unsigned long line_size, start, end, vto, flags; + + local_irq_save(flags); + vto = kremap0(vaddr, page_to_phys(page)); + dst = (void *)(vto | (vaddr & (PAGE_SIZE - 1))); + memcpy(dst, src, len); + if (vma->vm_flags & VM_EXEC) { + line_size = L1_cache_info[DCACHE].line_size; + start = (unsigned long)dst & ~(line_size - 1); + end = + ((unsigned long)dst + len + line_size - 1) & ~(line_size - + 1); + cpu_cache_wbinval_range(start, end, 1); + } + kunmap01(vto); + local_irq_restore(flags); +} + +void copy_from_user_page(struct vm_area_struct *vma, struct page *page, + unsigned long vaddr, void *dst, void *src, int len) +{ + unsigned long vto, flags; + + local_irq_save(flags); + vto = kremap0(vaddr, page_to_phys(page)); + src = (void *)(vto | (vaddr & (PAGE_SIZE - 1))); + memcpy(dst, src, len); + kunmap01(vto); + local_irq_restore(flags); +} + +void flush_anon_page(struct vm_area_struct *vma, + struct page *page, unsigned long vaddr) +{ + unsigned long kaddr, flags, ktmp; + if (!PageAnon(page)) + return; + + if (vma->vm_mm != current->active_mm) + return; + + local_irq_save(flags); + if (vma->vm_flags & VM_EXEC) + cpu_icache_inval_page(vaddr & PAGE_MASK); + kaddr = (unsigned long)page_address(page); + if (aliasing(vaddr, kaddr)) { + ktmp = kremap0(vaddr, page_to_phys(page)); + cpu_dcache_wbinval_page(ktmp); + kunmap01(ktmp); + } + local_irq_restore(flags); +} + +void flush_kernel_dcache_page(struct page *page) +{ + unsigned long flags; + local_irq_save(flags); + cpu_dcache_wbinval_page((unsigned long)page_address(page)); + local_irq_restore(flags); +} +EXPORT_SYMBOL(flush_kernel_dcache_page); + +void flush_kernel_vmap_range(void *addr, int size) +{ + unsigned long flags; + local_irq_save(flags); + cpu_dcache_wb_range((unsigned long)addr, (unsigned long)addr + size); + local_irq_restore(flags); +} +EXPORT_SYMBOL(flush_kernel_vmap_range); + +void invalidate_kernel_vmap_range(void *addr, int size) +{ + unsigned long flags; + local_irq_save(flags); + cpu_dcache_inval_range((unsigned long)addr, (unsigned long)addr + size); + local_irq_restore(flags); +} +EXPORT_SYMBOL(invalidate_kernel_vmap_range); +#endif diff --git a/arch/nds32/mm/extable.c b/arch/nds32/mm/extable.c new file mode 100644 index 000000000..db7f0a7c8 --- /dev/null +++ b/arch/nds32/mm/extable.c @@ -0,0 +1,16 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#include <linux/extable.h> +#include <linux/uaccess.h> + +int fixup_exception(struct pt_regs *regs) +{ + const struct exception_table_entry *fixup; + + fixup = search_exception_tables(instruction_pointer(regs)); + if (fixup) + regs->ipc = fixup->fixup; + + return fixup != NULL; +} diff --git a/arch/nds32/mm/fault.c b/arch/nds32/mm/fault.c new file mode 100644 index 000000000..b740534b1 --- /dev/null +++ b/arch/nds32/mm/fault.c @@ -0,0 +1,402 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#include <linux/extable.h> +#include <linux/module.h> +#include <linux/signal.h> +#include <linux/ptrace.h> +#include <linux/mm.h> +#include <linux/init.h> +#include <linux/hardirq.h> +#include <linux/uaccess.h> + +#include <asm/pgtable.h> +#include <asm/tlbflush.h> + +extern void die(const char *str, struct pt_regs *regs, long err); + +/* + * This is useful to dump out the page tables associated with + * 'addr' in mm 'mm'. + */ +void show_pte(struct mm_struct *mm, unsigned long addr) +{ + pgd_t *pgd; + if (!mm) + mm = &init_mm; + + pr_alert("pgd = %p\n", mm->pgd); + pgd = pgd_offset(mm, addr); + pr_alert("[%08lx] *pgd=%08lx", addr, pgd_val(*pgd)); + + do { + pmd_t *pmd; + + if (pgd_none(*pgd)) + break; + + if (pgd_bad(*pgd)) { + pr_alert("(bad)"); + break; + } + + pmd = pmd_offset(pgd, addr); +#if PTRS_PER_PMD != 1 + pr_alert(", *pmd=%08lx", pmd_val(*pmd)); +#endif + + if (pmd_none(*pmd)) + break; + + if (pmd_bad(*pmd)) { + pr_alert("(bad)"); + break; + } + + if (IS_ENABLED(CONFIG_HIGHMEM)) + { + pte_t *pte; + /* We must not map this if we have highmem enabled */ + pte = pte_offset_map(pmd, addr); + pr_alert(", *pte=%08lx", pte_val(*pte)); + pte_unmap(pte); + } + } while (0); + + pr_alert("\n"); +} + +void do_page_fault(unsigned long entry, unsigned long addr, + unsigned int error_code, struct pt_regs *regs) +{ + struct task_struct *tsk; + struct mm_struct *mm; + struct vm_area_struct *vma; + int si_code; + vm_fault_t fault; + unsigned int mask = VM_READ | VM_WRITE | VM_EXEC; + unsigned int flags = FAULT_FLAG_ALLOW_RETRY | FAULT_FLAG_KILLABLE; + + error_code = error_code & (ITYPE_mskINST | ITYPE_mskETYPE); + tsk = current; + mm = tsk->mm; + si_code = SEGV_MAPERR; + /* + * We fault-in kernel-space virtual memory on-demand. The + * 'reference' page table is init_mm.pgd. + * + * NOTE! We MUST NOT take any locks for this case. We may + * be in an interrupt or a critical region, and should + * only copy the information from the master page table, + * nothing more. + */ + if (addr >= TASK_SIZE) { + if (user_mode(regs)) + goto bad_area_nosemaphore; + + if (addr >= TASK_SIZE && addr < VMALLOC_END + && (entry == ENTRY_PTE_NOT_PRESENT)) + goto vmalloc_fault; + else + goto no_context; + } + + /* Send a signal to the task for handling the unalignment access. */ + if (entry == ENTRY_GENERAL_EXCPETION + && error_code == ETYPE_ALIGNMENT_CHECK) { + if (user_mode(regs)) + goto bad_area_nosemaphore; + else + goto no_context; + } + + /* + * If we're in an interrupt or have no user + * context, we must not take the fault.. + */ + if (unlikely(faulthandler_disabled() || !mm)) + goto no_context; + + /* + * As per x86, we may deadlock here. However, since the kernel only + * validly references user space from well defined areas of the code, + * we can bug out early if this is from code which shouldn't. + */ + if (unlikely(!down_read_trylock(&mm->mmap_sem))) { + if (!user_mode(regs) && + !search_exception_tables(instruction_pointer(regs))) + goto no_context; +retry: + down_read(&mm->mmap_sem); + } else { + /* + * The above down_read_trylock() might have succeeded in which + * case, we'll have missed the might_sleep() from down_read(). + */ + might_sleep(); + if (IS_ENABLED(CONFIG_DEBUG_VM)) { + if (!user_mode(regs) && + !search_exception_tables(instruction_pointer(regs))) + goto no_context; + } + } + + vma = find_vma(mm, addr); + + if (unlikely(!vma)) + goto bad_area; + + if (vma->vm_start <= addr) + goto good_area; + + if (unlikely(!(vma->vm_flags & VM_GROWSDOWN))) + goto bad_area; + + if (unlikely(expand_stack(vma, addr))) + goto bad_area; + + /* + * Ok, we have a good vm_area for this memory access, so + * we can handle it.. + */ + +good_area: + si_code = SEGV_ACCERR; + + /* first do some preliminary protection checks */ + if (entry == ENTRY_PTE_NOT_PRESENT) { + if (error_code & ITYPE_mskINST) + mask = VM_EXEC; + else { + mask = VM_READ | VM_WRITE; + if (vma->vm_flags & VM_WRITE) + flags |= FAULT_FLAG_WRITE; + } + } else if (entry == ENTRY_TLB_MISC) { + switch (error_code & ITYPE_mskETYPE) { + case RD_PROT: + mask = VM_READ; + break; + case WRT_PROT: + mask = VM_WRITE; + flags |= FAULT_FLAG_WRITE; + break; + case NOEXEC: + mask = VM_EXEC; + break; + case PAGE_MODIFY: + mask = VM_WRITE; + flags |= FAULT_FLAG_WRITE; + break; + case ACC_BIT: + BUG(); + default: + break; + } + + } + if (!(vma->vm_flags & mask)) + goto bad_area; + + /* + * If for any reason at all we couldn't handle the fault, + * make sure we exit gracefully rather than endlessly redo + * the fault. + */ + + fault = handle_mm_fault(vma, addr, flags); + + /* + * If we need to retry but a fatal signal is pending, handle the + * signal first. We do not need to release the mmap_sem because it + * would already be released in __lock_page_or_retry in mm/filemap.c. + */ + if ((fault & VM_FAULT_RETRY) && fatal_signal_pending(current)) { + if (!user_mode(regs)) + goto no_context; + return; + } + + if (unlikely(fault & VM_FAULT_ERROR)) { + if (fault & VM_FAULT_OOM) + goto out_of_memory; + else if (fault & VM_FAULT_SIGBUS) + goto do_sigbus; + else + goto bad_area; + } + + /* + * Major/minor page fault accounting is only done on the initial + * attempt. If we go through a retry, it is extremely likely that the + * page will be found in page cache at that point. + */ + if (flags & FAULT_FLAG_ALLOW_RETRY) { + if (fault & VM_FAULT_MAJOR) + tsk->maj_flt++; + else + tsk->min_flt++; + if (fault & VM_FAULT_RETRY) { + flags &= ~FAULT_FLAG_ALLOW_RETRY; + flags |= FAULT_FLAG_TRIED; + + /* No need to up_read(&mm->mmap_sem) as we would + * have already released it in __lock_page_or_retry + * in mm/filemap.c. + */ + goto retry; + } + } + + up_read(&mm->mmap_sem); + return; + + /* + * Something tried to access memory that isn't in our memory map.. + * Fix it, but check if it's kernel or user first.. + */ +bad_area: + up_read(&mm->mmap_sem); + +bad_area_nosemaphore: + + /* User mode accesses just cause a SIGSEGV */ + + if (user_mode(regs)) { + tsk->thread.address = addr; + tsk->thread.error_code = error_code; + tsk->thread.trap_no = entry; + force_sig_fault(SIGSEGV, si_code, (void __user *)addr, tsk); + return; + } + +no_context: + + /* Are we prepared to handle this kernel fault? + * + * (The kernel has valid exception-points in the source + * when it acesses user-memory. When it fails in one + * of those points, we find it in a table and do a jump + * to some fixup code that loads an appropriate error + * code) + */ + + { + const struct exception_table_entry *entry; + + if ((entry = + search_exception_tables(instruction_pointer(regs))) != + NULL) { + /* Adjust the instruction pointer in the stackframe */ + instruction_pointer(regs) = entry->fixup; + return; + } + } + + /* + * Oops. The kernel tried to access some bad page. We'll have to + * terminate things with extreme prejudice. + */ + + bust_spinlocks(1); + pr_alert("Unable to handle kernel %s at virtual address %08lx\n", + (addr < PAGE_SIZE) ? "NULL pointer dereference" : + "paging request", addr); + + show_pte(mm, addr); + die("Oops", regs, error_code); + bust_spinlocks(0); + do_exit(SIGKILL); + + return; + + /* + * We ran out of memory, or some other thing happened to us that made + * us unable to handle the page fault gracefully. + */ + +out_of_memory: + up_read(&mm->mmap_sem); + if (!user_mode(regs)) + goto no_context; + pagefault_out_of_memory(); + return; + +do_sigbus: + up_read(&mm->mmap_sem); + + /* Kernel mode? Handle exceptions or die */ + if (!user_mode(regs)) + goto no_context; + + /* + * Send a sigbus + */ + tsk->thread.address = addr; + tsk->thread.error_code = error_code; + tsk->thread.trap_no = entry; + force_sig_fault(SIGBUS, BUS_ADRERR, (void __user *)addr, tsk); + + return; + +vmalloc_fault: + { + /* + * Synchronize this task's top level page-table + * with the 'reference' page table. + * + * Use current_pgd instead of tsk->active_mm->pgd + * since the latter might be unavailable if this + * code is executed in a misfortunately run irq + * (like inside schedule() between switch_mm and + * switch_to...). + */ + + unsigned int index = pgd_index(addr); + pgd_t *pgd, *pgd_k; + pud_t *pud, *pud_k; + pmd_t *pmd, *pmd_k; + pte_t *pte_k; + + pgd = (pgd_t *) __va(__nds32__mfsr(NDS32_SR_L1_PPTB)) + index; + pgd_k = init_mm.pgd + index; + + if (!pgd_present(*pgd_k)) + goto no_context; + + pud = pud_offset(pgd, addr); + pud_k = pud_offset(pgd_k, addr); + if (!pud_present(*pud_k)) + goto no_context; + + pmd = pmd_offset(pud, addr); + pmd_k = pmd_offset(pud_k, addr); + if (!pmd_present(*pmd_k)) + goto no_context; + + if (!pmd_present(*pmd)) + set_pmd(pmd, *pmd_k); + else + BUG_ON(pmd_page(*pmd) != pmd_page(*pmd_k)); + + /* + * Since the vmalloc area is global, we don't + * need to copy individual PTE's, it is enough to + * copy the pgd pointer into the pte page of the + * root task. If that is there, we'll find our pte if + * it exists. + */ + + /* Make sure the actual PTE exists as well to + * catch kernel vmalloc-area accesses to non-mapped + * addres. If we don't do this, this will just + * silently loop forever. + */ + + pte_k = pte_offset_kernel(pmd_k, addr); + if (!pte_present(*pte_k)) + goto no_context; + + return; + } +} diff --git a/arch/nds32/mm/highmem.c b/arch/nds32/mm/highmem.c new file mode 100644 index 000000000..e17cb8a69 --- /dev/null +++ b/arch/nds32/mm/highmem.c @@ -0,0 +1,79 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#include <linux/export.h> +#include <linux/highmem.h> +#include <linux/sched.h> +#include <linux/smp.h> +#include <linux/interrupt.h> +#include <linux/bootmem.h> +#include <asm/fixmap.h> +#include <asm/tlbflush.h> + +void *kmap(struct page *page) +{ + unsigned long vaddr; + might_sleep(); + if (!PageHighMem(page)) + return page_address(page); + vaddr = (unsigned long)kmap_high(page); + return (void *)vaddr; +} + +EXPORT_SYMBOL(kmap); + +void kunmap(struct page *page) +{ + BUG_ON(in_interrupt()); + if (!PageHighMem(page)) + return; + kunmap_high(page); +} + +EXPORT_SYMBOL(kunmap); + +void *kmap_atomic(struct page *page) +{ + unsigned int idx; + unsigned long vaddr, pte; + int type; + pte_t *ptep; + + preempt_disable(); + pagefault_disable(); + if (!PageHighMem(page)) + return page_address(page); + + type = kmap_atomic_idx_push(); + + idx = type + KM_TYPE_NR * smp_processor_id(); + vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx); + pte = (page_to_pfn(page) << PAGE_SHIFT) | (PAGE_KERNEL); + ptep = pte_offset_kernel(pmd_off_k(vaddr), vaddr); + set_pte(ptep, pte); + + __nds32__tlbop_inv(vaddr); + __nds32__mtsr_dsb(vaddr, NDS32_SR_TLB_VPN); + __nds32__tlbop_rwr(pte); + __nds32__isb(); + return (void *)vaddr; +} + +EXPORT_SYMBOL(kmap_atomic); + +void __kunmap_atomic(void *kvaddr) +{ + if (kvaddr >= (void *)FIXADDR_START) { + unsigned long vaddr = (unsigned long)kvaddr; + pte_t *ptep; + kmap_atomic_idx_pop(); + __nds32__tlbop_inv(vaddr); + __nds32__isb(); + ptep = pte_offset_kernel(pmd_off_k(vaddr), vaddr); + set_pte(ptep, 0); + } + pagefault_enable(); + preempt_enable(); +} + +EXPORT_SYMBOL(__kunmap_atomic); diff --git a/arch/nds32/mm/init.c b/arch/nds32/mm/init.c new file mode 100644 index 000000000..c713d2ad5 --- /dev/null +++ b/arch/nds32/mm/init.c @@ -0,0 +1,278 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 1995-2005 Russell King +// Copyright (C) 2012 ARM Ltd. +// Copyright (C) 2013-2017 Andes Technology Corporation + +#include <linux/kernel.h> +#include <linux/errno.h> +#include <linux/swap.h> +#include <linux/init.h> +#include <linux/bootmem.h> +#include <linux/mman.h> +#include <linux/nodemask.h> +#include <linux/initrd.h> +#include <linux/highmem.h> +#include <linux/memblock.h> + +#include <asm/sections.h> +#include <asm/setup.h> +#include <asm/tlb.h> +#include <asm/page.h> + +DEFINE_PER_CPU(struct mmu_gather, mmu_gathers); +DEFINE_SPINLOCK(anon_alias_lock); +extern pgd_t swapper_pg_dir[PTRS_PER_PGD]; +extern unsigned long phys_initrd_start; +extern unsigned long phys_initrd_size; + +/* + * empty_zero_page is a special page that is used for + * zero-initialized data and COW. + */ +struct page *empty_zero_page; +EXPORT_SYMBOL(empty_zero_page); + +static void __init zone_sizes_init(void) +{ + unsigned long zones_size[MAX_NR_ZONES]; + + /* Clear the zone sizes */ + memset(zones_size, 0, sizeof(zones_size)); + + zones_size[ZONE_NORMAL] = max_low_pfn; +#ifdef CONFIG_HIGHMEM + zones_size[ZONE_HIGHMEM] = max_pfn; +#endif + free_area_init(zones_size); + +} + +/* + * Map all physical memory under high_memory into kernel's address space. + * + * This is explicitly coded for two-level page tables, so if you need + * something else then this needs to change. + */ +static void __init map_ram(void) +{ + unsigned long v, p, e; + pgd_t *pge; + pud_t *pue; + pmd_t *pme; + pte_t *pte; + /* These mark extents of read-only kernel pages... + * ...from vmlinux.lds.S + */ + + p = (u32) memblock_start_of_DRAM() & PAGE_MASK; + e = min((u32) memblock_end_of_DRAM(), (u32) __pa(high_memory)); + + v = (u32) __va(p); + pge = pgd_offset_k(v); + + while (p < e) { + int j; + pue = pud_offset(pge, v); + pme = pmd_offset(pue, v); + + if ((u32) pue != (u32) pge || (u32) pme != (u32) pge) { + panic("%s: Kernel hardcoded for " + "two-level page tables", __func__); + } + + /* Alloc one page for holding PTE's... */ + pte = (pte_t *) __va(memblock_alloc(PAGE_SIZE, PAGE_SIZE)); + memset(pte, 0, PAGE_SIZE); + set_pmd(pme, __pmd(__pa(pte) + _PAGE_KERNEL_TABLE)); + + /* Fill the newly allocated page with PTE'S */ + for (j = 0; p < e && j < PTRS_PER_PTE; + v += PAGE_SIZE, p += PAGE_SIZE, j++, pte++) { + /* Create mapping between p and v. */ + /* TODO: more fine grant for page access permission */ + set_pte(pte, __pte(p + pgprot_val(PAGE_KERNEL))); + } + + pge++; + } +} +static pmd_t *fixmap_pmd_p; +static void __init fixedrange_init(void) +{ + unsigned long vaddr; + pgd_t *pgd; + pud_t *pud; + pmd_t *pmd; +#ifdef CONFIG_HIGHMEM + pte_t *pte; +#endif /* CONFIG_HIGHMEM */ + + /* + * Fixed mappings: + */ + vaddr = __fix_to_virt(__end_of_fixed_addresses - 1); + pgd = swapper_pg_dir + pgd_index(vaddr); + pud = pud_offset(pgd, vaddr); + pmd = pmd_offset(pud, vaddr); + fixmap_pmd_p = (pmd_t *) __va(memblock_alloc(PAGE_SIZE, PAGE_SIZE)); + memset(fixmap_pmd_p, 0, PAGE_SIZE); + set_pmd(pmd, __pmd(__pa(fixmap_pmd_p) + _PAGE_KERNEL_TABLE)); + +#ifdef CONFIG_HIGHMEM + /* + * Permanent kmaps: + */ + vaddr = PKMAP_BASE; + + pgd = swapper_pg_dir + pgd_index(vaddr); + pud = pud_offset(pgd, vaddr); + pmd = pmd_offset(pud, vaddr); + pte = (pte_t *) __va(memblock_alloc(PAGE_SIZE, PAGE_SIZE)); + memset(pte, 0, PAGE_SIZE); + set_pmd(pmd, __pmd(__pa(pte) + _PAGE_KERNEL_TABLE)); + pkmap_page_table = pte; +#endif /* CONFIG_HIGHMEM */ +} + +/* + * paging_init() sets up the page tables, initialises the zone memory + * maps, and sets up the zero page, bad page and bad page tables. + */ +void __init paging_init(void) +{ + int i; + void *zero_page; + + pr_info("Setting up paging and PTEs.\n"); + /* clear out the init_mm.pgd that will contain the kernel's mappings */ + for (i = 0; i < PTRS_PER_PGD; i++) + swapper_pg_dir[i] = __pgd(1); + + map_ram(); + + fixedrange_init(); + + /* allocate space for empty_zero_page */ + zero_page = __va(memblock_alloc(PAGE_SIZE, PAGE_SIZE)); + memset(zero_page, 0, PAGE_SIZE); + zone_sizes_init(); + + empty_zero_page = virt_to_page(zero_page); + flush_dcache_page(empty_zero_page); +} + +static inline void __init free_highmem(void) +{ +#ifdef CONFIG_HIGHMEM + unsigned long pfn; + for (pfn = PFN_UP(__pa(high_memory)); pfn < max_pfn; pfn++) { + phys_addr_t paddr = (phys_addr_t) pfn << PAGE_SHIFT; + if (!memblock_is_reserved(paddr)) + free_highmem_page(pfn_to_page(pfn)); + } +#endif +} + +static void __init set_max_mapnr_init(void) +{ + max_mapnr = max_pfn; +} + +/* + * mem_init() marks the free areas in the mem_map and tells us how much + * memory is free. This is done after various parts of the system have + * claimed their memory after the kernel image. + */ +void __init mem_init(void) +{ + phys_addr_t memory_start = memblock_start_of_DRAM(); + BUG_ON(!mem_map); + set_max_mapnr_init(); + + free_highmem(); + + /* this will put all low memory onto the freelists */ + free_all_bootmem(); + mem_init_print_info(NULL); + + pr_info("virtual kernel memory layout:\n" + " fixmap : 0x%08lx - 0x%08lx (%4ld kB)\n" +#ifdef CONFIG_HIGHMEM + " pkmap : 0x%08lx - 0x%08lx (%4ld kB)\n" +#endif + " consist : 0x%08lx - 0x%08lx (%4ld MB)\n" + " vmalloc : 0x%08lx - 0x%08lx (%4ld MB)\n" + " lowmem : 0x%08lx - 0x%08lx (%4ld MB)\n" + " .init : 0x%08lx - 0x%08lx (%4ld kB)\n" + " .data : 0x%08lx - 0x%08lx (%4ld kB)\n" + " .text : 0x%08lx - 0x%08lx (%4ld kB)\n", + FIXADDR_START, FIXADDR_TOP, (FIXADDR_TOP - FIXADDR_START) >> 10, +#ifdef CONFIG_HIGHMEM + PKMAP_BASE, PKMAP_BASE + LAST_PKMAP * PAGE_SIZE, + (LAST_PKMAP * PAGE_SIZE) >> 10, +#endif + CONSISTENT_BASE, CONSISTENT_END, + ((CONSISTENT_END) - (CONSISTENT_BASE)) >> 20, VMALLOC_START, + (unsigned long)VMALLOC_END, (VMALLOC_END - VMALLOC_START) >> 20, + (unsigned long)__va(memory_start), (unsigned long)high_memory, + ((unsigned long)high_memory - + (unsigned long)__va(memory_start)) >> 20, + (unsigned long)&__init_begin, (unsigned long)&__init_end, + ((unsigned long)&__init_end - + (unsigned long)&__init_begin) >> 10, (unsigned long)&_etext, + (unsigned long)&_edata, + ((unsigned long)&_edata - (unsigned long)&_etext) >> 10, + (unsigned long)&_text, (unsigned long)&_etext, + ((unsigned long)&_etext - (unsigned long)&_text) >> 10); + + /* + * Check boundaries twice: Some fundamental inconsistencies can + * be detected at build time already. + */ +#ifdef CONFIG_HIGHMEM + BUILD_BUG_ON(PKMAP_BASE + LAST_PKMAP * PAGE_SIZE > FIXADDR_START); + BUILD_BUG_ON((CONSISTENT_END) > PKMAP_BASE); +#endif + BUILD_BUG_ON(VMALLOC_END > CONSISTENT_BASE); + BUILD_BUG_ON(VMALLOC_START >= VMALLOC_END); + +#ifdef CONFIG_HIGHMEM + BUG_ON(PKMAP_BASE + LAST_PKMAP * PAGE_SIZE > FIXADDR_START); + BUG_ON(CONSISTENT_END > PKMAP_BASE); +#endif + BUG_ON(VMALLOC_END > CONSISTENT_BASE); + BUG_ON(VMALLOC_START >= VMALLOC_END); + BUG_ON((unsigned long)high_memory > VMALLOC_START); + + return; +} + +void free_initmem(void) +{ + free_initmem_default(-1); +} + +#ifdef CONFIG_BLK_DEV_INITRD +void free_initrd_mem(unsigned long start, unsigned long end) +{ + free_reserved_area((void *)start, (void *)end, -1, "initrd"); +} +#endif + +void __set_fixmap(enum fixed_addresses idx, + phys_addr_t phys, pgprot_t flags) +{ + unsigned long addr = __fix_to_virt(idx); + pte_t *pte; + + BUG_ON(idx <= FIX_HOLE || idx >= __end_of_fixed_addresses); + + pte = (pte_t *)&fixmap_pmd_p[pte_index(addr)];; + + if (pgprot_val(flags)) { + set_pte(pte, pfn_pte(phys >> PAGE_SHIFT, flags)); + } else { + pte_clear(&init_mm, addr, pte); + flush_tlb_kernel_range(addr, addr + PAGE_SIZE); + } +} diff --git a/arch/nds32/mm/ioremap.c b/arch/nds32/mm/ioremap.c new file mode 100644 index 000000000..690140bb2 --- /dev/null +++ b/arch/nds32/mm/ioremap.c @@ -0,0 +1,62 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#include <linux/vmalloc.h> +#include <linux/io.h> +#include <linux/mm.h> +#include <asm/pgtable.h> + +void __iomem *ioremap(phys_addr_t phys_addr, size_t size); + +static void __iomem *__ioremap_caller(phys_addr_t phys_addr, size_t size, + void *caller) +{ + struct vm_struct *area; + unsigned long addr, offset, last_addr; + pgprot_t prot; + + /* Don't allow wraparound or zero size */ + last_addr = phys_addr + size - 1; + if (!size || last_addr < phys_addr) + return NULL; + + /* + * Mappings have to be page-aligned + */ + offset = phys_addr & ~PAGE_MASK; + phys_addr &= PAGE_MASK; + size = PAGE_ALIGN(last_addr + 1) - phys_addr; + + /* + * Ok, go for it.. + */ + area = get_vm_area_caller(size, VM_IOREMAP, caller); + if (!area) + return NULL; + + area->phys_addr = phys_addr; + addr = (unsigned long)area->addr; + prot = __pgprot(_PAGE_V | _PAGE_M_KRW | _PAGE_D | + _PAGE_G | _PAGE_C_DEV); + if (ioremap_page_range(addr, addr + size, phys_addr, prot)) { + vunmap((void *)addr); + return NULL; + } + return (__force void __iomem *)(offset + (char *)addr); + +} + +void __iomem *ioremap(phys_addr_t phys_addr, size_t size) +{ + return __ioremap_caller(phys_addr, size, + __builtin_return_address(0)); +} + +EXPORT_SYMBOL(ioremap); + +void iounmap(volatile void __iomem * addr) +{ + vunmap((void *)(PAGE_MASK & (unsigned long)addr)); +} + +EXPORT_SYMBOL(iounmap); diff --git a/arch/nds32/mm/mm-nds32.c b/arch/nds32/mm/mm-nds32.c new file mode 100644 index 000000000..3b43798d7 --- /dev/null +++ b/arch/nds32/mm/mm-nds32.c @@ -0,0 +1,90 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#include <linux/init_task.h> +#include <asm/pgalloc.h> + +#define FIRST_KERNEL_PGD_NR (USER_PTRS_PER_PGD) + +/* + * need to get a page for level 1 + */ + +pgd_t *pgd_alloc(struct mm_struct *mm) +{ + pgd_t *new_pgd, *init_pgd; + int i; + + new_pgd = (pgd_t *) __get_free_pages(GFP_KERNEL, 0); + if (!new_pgd) + return NULL; + for (i = 0; i < PTRS_PER_PGD; i++) { + (*new_pgd) = 1; + new_pgd++; + } + new_pgd -= PTRS_PER_PGD; + + init_pgd = pgd_offset_k(0); + + memcpy(new_pgd + FIRST_KERNEL_PGD_NR, init_pgd + FIRST_KERNEL_PGD_NR, + (PTRS_PER_PGD - FIRST_KERNEL_PGD_NR) * sizeof(pgd_t)); + + cpu_dcache_wb_range((unsigned long)new_pgd, + (unsigned long)new_pgd + + PTRS_PER_PGD * sizeof(pgd_t)); + inc_zone_page_state(virt_to_page((unsigned long *)new_pgd), + NR_PAGETABLE); + + return new_pgd; +} + +void pgd_free(struct mm_struct *mm, pgd_t * pgd) +{ + pmd_t *pmd; + struct page *pte; + + if (!pgd) + return; + + pmd = (pmd_t *) pgd; + if (pmd_none(*pmd)) + goto free; + if (pmd_bad(*pmd)) { + pmd_ERROR(*pmd); + pmd_clear(pmd); + goto free; + } + + pte = pmd_page(*pmd); + pmd_clear(pmd); + dec_zone_page_state(virt_to_page((unsigned long *)pgd), NR_PAGETABLE); + pte_free(mm, pte); + mm_dec_nr_ptes(mm); + pmd_free(mm, pmd); +free: + free_pages((unsigned long)pgd, 0); +} + +/* + * In order to soft-boot, we need to insert a 1:1 mapping in place of + * the user-mode pages. This will then ensure that we have predictable + * results when turning the mmu off + */ +void setup_mm_for_reboot(char mode) +{ + unsigned long pmdval; + pgd_t *pgd; + pmd_t *pmd; + int i; + + if (current->mm && current->mm->pgd) + pgd = current->mm->pgd; + else + pgd = init_mm.pgd; + + for (i = 0; i < USER_PTRS_PER_PGD; i++) { + pmdval = (i << PGDIR_SHIFT); + pmd = pmd_offset(pgd + i, i << PGDIR_SHIFT); + set_pmd(pmd, __pmd(pmdval)); + } +} diff --git a/arch/nds32/mm/mmap.c b/arch/nds32/mm/mmap.c new file mode 100644 index 000000000..1bdf5e7d1 --- /dev/null +++ b/arch/nds32/mm/mmap.c @@ -0,0 +1,73 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#include <linux/sched.h> +#include <linux/mman.h> +#include <linux/shm.h> + +#define COLOUR_ALIGN(addr,pgoff) \ + ((((addr)+SHMLBA-1)&~(SHMLBA-1)) + \ + (((pgoff)<<PAGE_SHIFT) & (SHMLBA-1))) + +/* + * We need to ensure that shared mappings are correctly aligned to + * avoid aliasing issues with VIPT caches. We need to ensure that + * a specific page of an object is always mapped at a multiple of + * SHMLBA bytes. + * + * We unconditionally provide this function for all cases, however + * in the VIVT case, we optimise out the alignment rules. + */ +unsigned long +arch_get_unmapped_area(struct file *filp, unsigned long addr, + unsigned long len, unsigned long pgoff, + unsigned long flags) +{ + struct mm_struct *mm = current->mm; + struct vm_area_struct *vma; + int do_align = 0; + struct vm_unmapped_area_info info; + int aliasing = 0; + if(IS_ENABLED(CONFIG_CPU_CACHE_ALIASING)) + aliasing = 1; + + /* + * We only need to do colour alignment if either the I or D + * caches alias. + */ + if (aliasing) + do_align = filp || (flags & MAP_SHARED); + + /* + * We enforce the MAP_FIXED case. + */ + if (flags & MAP_FIXED) { + if (aliasing && flags & MAP_SHARED && + (addr - (pgoff << PAGE_SHIFT)) & (SHMLBA - 1)) + return -EINVAL; + return addr; + } + + if (len > TASK_SIZE) + return -ENOMEM; + + if (addr) { + if (do_align) + addr = COLOUR_ALIGN(addr, pgoff); + else + addr = PAGE_ALIGN(addr); + + vma = find_vma(mm, addr); + if (TASK_SIZE - len >= addr && + (!vma || addr + len <= vm_start_gap(vma))) + return addr; + } + + info.flags = 0; + info.length = len; + info.low_limit = mm->mmap_base; + info.high_limit = TASK_SIZE; + info.align_mask = do_align ? (PAGE_MASK & (SHMLBA - 1)) : 0; + info.align_offset = pgoff << PAGE_SHIFT; + return vm_unmapped_area(&info); +} diff --git a/arch/nds32/mm/proc.c b/arch/nds32/mm/proc.c new file mode 100644 index 000000000..ba80992d1 --- /dev/null +++ b/arch/nds32/mm/proc.c @@ -0,0 +1,533 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#include <linux/module.h> +#include <linux/sched.h> +#include <linux/mm.h> +#include <asm/nds32.h> +#include <asm/pgtable.h> +#include <asm/tlbflush.h> +#include <asm/cacheflush.h> +#include <asm/l2_cache.h> +#include <nds32_intrinsic.h> + +#include <asm/cache_info.h> +extern struct cache_info L1_cache_info[2]; + +int va_kernel_present(unsigned long addr) +{ + pmd_t *pmd; + pte_t *ptep, pte; + + pmd = pmd_offset(pgd_offset_k(addr), addr); + if (!pmd_none(*pmd)) { + ptep = pte_offset_map(pmd, addr); + pte = *ptep; + if (pte_present(pte)) + return pte; + } + return 0; +} + +pte_t va_present(struct mm_struct * mm, unsigned long addr) +{ + pgd_t *pgd; + pud_t *pud; + pmd_t *pmd; + pte_t *ptep, pte; + + pgd = pgd_offset(mm, addr); + if (!pgd_none(*pgd)) { + pud = pud_offset(pgd, addr); + if (!pud_none(*pud)) { + pmd = pmd_offset(pud, addr); + if (!pmd_none(*pmd)) { + ptep = pte_offset_map(pmd, addr); + pte = *ptep; + if (pte_present(pte)) + return pte; + } + } + } + return 0; + +} + +int va_readable(struct pt_regs *regs, unsigned long addr) +{ + struct mm_struct *mm = current->mm; + pte_t pte; + int ret = 0; + + if (user_mode(regs)) { + /* user mode */ + pte = va_present(mm, addr); + if (!pte && pte_read(pte)) + ret = 1; + } else { + /* superuser mode is always readable, so we can only + * check it is present or not*/ + return (! !va_kernel_present(addr)); + } + return ret; +} + +int va_writable(struct pt_regs *regs, unsigned long addr) +{ + struct mm_struct *mm = current->mm; + pte_t pte; + int ret = 0; + + if (user_mode(regs)) { + /* user mode */ + pte = va_present(mm, addr); + if (!pte && pte_write(pte)) + ret = 1; + } else { + /* superuser mode */ + pte = va_kernel_present(addr); + if (!pte && pte_kernel_write(pte)) + ret = 1; + } + return ret; +} + +/* + * All + */ +void cpu_icache_inval_all(void) +{ + unsigned long end, line_size; + + line_size = L1_cache_info[ICACHE].line_size; + end = + line_size * L1_cache_info[ICACHE].ways * L1_cache_info[ICACHE].sets; + + do { + end -= line_size; + __asm__ volatile ("\n\tcctl %0, L1I_IX_INVAL"::"r" (end)); + end -= line_size; + __asm__ volatile ("\n\tcctl %0, L1I_IX_INVAL"::"r" (end)); + end -= line_size; + __asm__ volatile ("\n\tcctl %0, L1I_IX_INVAL"::"r" (end)); + end -= line_size; + __asm__ volatile ("\n\tcctl %0, L1I_IX_INVAL"::"r" (end)); + } while (end > 0); + __nds32__isb(); +} + +void cpu_dcache_inval_all(void) +{ + __nds32__cctl_l1d_invalall(); +} + +#ifdef CONFIG_CACHE_L2 +void dcache_wb_all_level(void) +{ + unsigned long flags, cmd; + local_irq_save(flags); + __nds32__cctl_l1d_wball_alvl(); + /* Section 1: Ensure the section 2 & 3 program code execution after */ + __nds32__cctlidx_read(NDS32_CCTL_L1D_IX_RWD,0); + + /* Section 2: Confirm the writeback all level is done in CPU and L2C */ + cmd = CCTL_CMD_L2_SYNC; + L2_CMD_RDY(); + L2C_W_REG(L2_CCTL_CMD_OFF, cmd); + L2_CMD_RDY(); + + /* Section 3: Writeback whole L2 cache */ + cmd = CCTL_ALL_CMD | CCTL_CMD_L2_IX_WB; + L2_CMD_RDY(); + L2C_W_REG(L2_CCTL_CMD_OFF, cmd); + L2_CMD_RDY(); + __nds32__msync_all(); + local_irq_restore(flags); +} +EXPORT_SYMBOL(dcache_wb_all_level); +#endif + +void cpu_dcache_wb_all(void) +{ + __nds32__cctl_l1d_wball_one_lvl(); + __nds32__cctlidx_read(NDS32_CCTL_L1D_IX_RWD,0); +} + +void cpu_dcache_wbinval_all(void) +{ +#ifndef CONFIG_CPU_DCACHE_WRITETHROUGH + unsigned long flags; + local_irq_save(flags); +#endif + cpu_dcache_wb_all(); + cpu_dcache_inval_all(); +#ifndef CONFIG_CPU_DCACHE_WRITETHROUGH + local_irq_restore(flags); +#endif +} + +/* + * Page + */ +void cpu_icache_inval_page(unsigned long start) +{ + unsigned long line_size, end; + + line_size = L1_cache_info[ICACHE].line_size; + end = start + PAGE_SIZE; + + do { + end -= line_size; + __asm__ volatile ("\n\tcctl %0, L1I_VA_INVAL"::"r" (end)); + end -= line_size; + __asm__ volatile ("\n\tcctl %0, L1I_VA_INVAL"::"r" (end)); + end -= line_size; + __asm__ volatile ("\n\tcctl %0, L1I_VA_INVAL"::"r" (end)); + end -= line_size; + __asm__ volatile ("\n\tcctl %0, L1I_VA_INVAL"::"r" (end)); + } while (end != start); + __nds32__isb(); +} + +void cpu_dcache_inval_page(unsigned long start) +{ + unsigned long line_size, end; + + line_size = L1_cache_info[DCACHE].line_size; + end = start + PAGE_SIZE; + + do { + end -= line_size; + __asm__ volatile ("\n\tcctl %0, L1D_VA_INVAL"::"r" (end)); + end -= line_size; + __asm__ volatile ("\n\tcctl %0, L1D_VA_INVAL"::"r" (end)); + end -= line_size; + __asm__ volatile ("\n\tcctl %0, L1D_VA_INVAL"::"r" (end)); + end -= line_size; + __asm__ volatile ("\n\tcctl %0, L1D_VA_INVAL"::"r" (end)); + } while (end != start); +} + +void cpu_dcache_wb_page(unsigned long start) +{ +#ifndef CONFIG_CPU_DCACHE_WRITETHROUGH + unsigned long line_size, end; + + line_size = L1_cache_info[DCACHE].line_size; + end = start + PAGE_SIZE; + + do { + end -= line_size; + __asm__ volatile ("\n\tcctl %0, L1D_VA_WB"::"r" (end)); + end -= line_size; + __asm__ volatile ("\n\tcctl %0, L1D_VA_WB"::"r" (end)); + end -= line_size; + __asm__ volatile ("\n\tcctl %0, L1D_VA_WB"::"r" (end)); + end -= line_size; + __asm__ volatile ("\n\tcctl %0, L1D_VA_WB"::"r" (end)); + } while (end != start); + __nds32__cctlidx_read(NDS32_CCTL_L1D_IX_RWD,0); +#endif +} + +void cpu_dcache_wbinval_page(unsigned long start) +{ + unsigned long line_size, end; + + line_size = L1_cache_info[DCACHE].line_size; + end = start + PAGE_SIZE; + + do { + end -= line_size; +#ifndef CONFIG_CPU_DCACHE_WRITETHROUGH + __asm__ volatile ("\n\tcctl %0, L1D_VA_WB"::"r" (end)); +#endif + __asm__ volatile ("\n\tcctl %0, L1D_VA_INVAL"::"r" (end)); + end -= line_size; +#ifndef CONFIG_CPU_DCACHE_WRITETHROUGH + __asm__ volatile ("\n\tcctl %0, L1D_VA_WB"::"r" (end)); +#endif + __asm__ volatile ("\n\tcctl %0, L1D_VA_INVAL"::"r" (end)); + end -= line_size; +#ifndef CONFIG_CPU_DCACHE_WRITETHROUGH + __asm__ volatile ("\n\tcctl %0, L1D_VA_WB"::"r" (end)); +#endif + __asm__ volatile ("\n\tcctl %0, L1D_VA_INVAL"::"r" (end)); + end -= line_size; +#ifndef CONFIG_CPU_DCACHE_WRITETHROUGH + __asm__ volatile ("\n\tcctl %0, L1D_VA_WB"::"r" (end)); +#endif + __asm__ volatile ("\n\tcctl %0, L1D_VA_INVAL"::"r" (end)); + } while (end != start); + __nds32__cctlidx_read(NDS32_CCTL_L1D_IX_RWD,0); +} + +void cpu_cache_wbinval_page(unsigned long page, int flushi) +{ + cpu_dcache_wbinval_page(page); + if (flushi) + cpu_icache_inval_page(page); +} + +/* + * Range + */ +void cpu_icache_inval_range(unsigned long start, unsigned long end) +{ + unsigned long line_size; + + line_size = L1_cache_info[ICACHE].line_size; + + while (end > start) { + __asm__ volatile ("\n\tcctl %0, L1I_VA_INVAL"::"r" (start)); + start += line_size; + } + __nds32__isb(); +} + +void cpu_dcache_inval_range(unsigned long start, unsigned long end) +{ + unsigned long line_size; + + line_size = L1_cache_info[DCACHE].line_size; + + while (end > start) { + __asm__ volatile ("\n\tcctl %0, L1D_VA_INVAL"::"r" (start)); + start += line_size; + } +} + +void cpu_dcache_wb_range(unsigned long start, unsigned long end) +{ +#ifndef CONFIG_CPU_DCACHE_WRITETHROUGH + unsigned long line_size; + + line_size = L1_cache_info[DCACHE].line_size; + + while (end > start) { + __asm__ volatile ("\n\tcctl %0, L1D_VA_WB"::"r" (start)); + start += line_size; + } + __nds32__cctlidx_read(NDS32_CCTL_L1D_IX_RWD,0); +#endif +} + +void cpu_dcache_wbinval_range(unsigned long start, unsigned long end) +{ + unsigned long line_size; + + line_size = L1_cache_info[DCACHE].line_size; + + while (end > start) { +#ifndef CONFIG_CPU_DCACHE_WRITETHROUGH + __asm__ volatile ("\n\tcctl %0, L1D_VA_WB"::"r" (start)); +#endif + __asm__ volatile ("\n\tcctl %0, L1D_VA_INVAL"::"r" (start)); + start += line_size; + } + __nds32__cctlidx_read(NDS32_CCTL_L1D_IX_RWD,0); +} + +void cpu_cache_wbinval_range(unsigned long start, unsigned long end, int flushi) +{ + unsigned long line_size, align_start, align_end; + + line_size = L1_cache_info[DCACHE].line_size; + align_start = start & ~(line_size - 1); + align_end = (end + line_size - 1) & ~(line_size - 1); + cpu_dcache_wbinval_range(align_start, align_end); + + if (flushi) { + line_size = L1_cache_info[ICACHE].line_size; + align_start = start & ~(line_size - 1); + align_end = (end + line_size - 1) & ~(line_size - 1); + cpu_icache_inval_range(align_start, align_end); + } +} + +void cpu_cache_wbinval_range_check(struct vm_area_struct *vma, + unsigned long start, unsigned long end, + bool flushi, bool wbd) +{ + unsigned long line_size, t_start, t_end; + + if (!flushi && !wbd) + return; + line_size = L1_cache_info[DCACHE].line_size; + start = start & ~(line_size - 1); + end = (end + line_size - 1) & ~(line_size - 1); + + if ((end - start) > (8 * PAGE_SIZE)) { + if (wbd) + cpu_dcache_wbinval_all(); + if (flushi) + cpu_icache_inval_all(); + return; + } + + t_start = (start + PAGE_SIZE) & PAGE_MASK; + t_end = ((end - 1) & PAGE_MASK); + + if ((start & PAGE_MASK) == t_end) { + if (va_present(vma->vm_mm, start)) { + if (wbd) + cpu_dcache_wbinval_range(start, end); + if (flushi) + cpu_icache_inval_range(start, end); + } + return; + } + + if (va_present(vma->vm_mm, start)) { + if (wbd) + cpu_dcache_wbinval_range(start, t_start); + if (flushi) + cpu_icache_inval_range(start, t_start); + } + + if (va_present(vma->vm_mm, end - 1)) { + if (wbd) + cpu_dcache_wbinval_range(t_end, end); + if (flushi) + cpu_icache_inval_range(t_end, end); + } + + while (t_start < t_end) { + if (va_present(vma->vm_mm, t_start)) { + if (wbd) + cpu_dcache_wbinval_page(t_start); + if (flushi) + cpu_icache_inval_page(t_start); + } + t_start += PAGE_SIZE; + } +} + +#ifdef CONFIG_CACHE_L2 +static inline void cpu_l2cache_op(unsigned long start, unsigned long end, unsigned long op) +{ + if (atl2c_base) { + unsigned long p_start = __pa(start); + unsigned long p_end = __pa(end); + unsigned long cmd; + unsigned long line_size; + /* TODO Can Use PAGE Mode to optimize if range large than PAGE_SIZE */ + line_size = L2_CACHE_LINE_SIZE(); + p_start = p_start & (~(line_size - 1)); + p_end = (p_end + line_size - 1) & (~(line_size - 1)); + cmd = + (p_start & ~(line_size - 1)) | op | + CCTL_SINGLE_CMD; + do { + L2_CMD_RDY(); + L2C_W_REG(L2_CCTL_CMD_OFF, cmd); + cmd += line_size; + p_start += line_size; + } while (p_end > p_start); + cmd = CCTL_CMD_L2_SYNC; + L2_CMD_RDY(); + L2C_W_REG(L2_CCTL_CMD_OFF, cmd); + L2_CMD_RDY(); + } +} +#else +#define cpu_l2cache_op(start,end,op) do { } while (0) +#endif +/* + * DMA + */ +void cpu_dma_wb_range(unsigned long start, unsigned long end) +{ + unsigned long line_size; + unsigned long flags; + line_size = L1_cache_info[DCACHE].line_size; + start = start & (~(line_size - 1)); + end = (end + line_size - 1) & (~(line_size - 1)); + if (unlikely(start == end)) + return; + + local_irq_save(flags); + cpu_dcache_wb_range(start, end); + cpu_l2cache_op(start, end, CCTL_CMD_L2_PA_WB); + __nds32__msync_all(); + local_irq_restore(flags); +} + +void cpu_dma_inval_range(unsigned long start, unsigned long end) +{ + unsigned long line_size; + unsigned long old_start = start; + unsigned long old_end = end; + unsigned long flags; + line_size = L1_cache_info[DCACHE].line_size; + start = start & (~(line_size - 1)); + end = (end + line_size - 1) & (~(line_size - 1)); + if (unlikely(start == end)) + return; + local_irq_save(flags); + if (start != old_start) { + cpu_dcache_wbinval_range(start, start + line_size); + cpu_l2cache_op(start, start + line_size, CCTL_CMD_L2_PA_WBINVAL); + } + if (end != old_end) { + cpu_dcache_wbinval_range(end - line_size, end); + cpu_l2cache_op(end - line_size, end, CCTL_CMD_L2_PA_WBINVAL); + } + cpu_dcache_inval_range(start, end); + cpu_l2cache_op(start, end, CCTL_CMD_L2_PA_INVAL); + __nds32__msync_all(); + local_irq_restore(flags); + +} + +void cpu_dma_wbinval_range(unsigned long start, unsigned long end) +{ + unsigned long line_size; + unsigned long flags; + line_size = L1_cache_info[DCACHE].line_size; + start = start & (~(line_size - 1)); + end = (end + line_size - 1) & (~(line_size - 1)); + if (unlikely(start == end)) + return; + + local_irq_save(flags); + cpu_dcache_wbinval_range(start, end); + cpu_l2cache_op(start, end, CCTL_CMD_L2_PA_WBINVAL); + __nds32__msync_all(); + local_irq_restore(flags); +} + +void cpu_proc_init(void) +{ +} + +void cpu_proc_fin(void) +{ +} + +void cpu_do_idle(void) +{ + __nds32__standby_no_wake_grant(); +} + +void cpu_reset(unsigned long reset) +{ + u32 tmp; + GIE_DISABLE(); + tmp = __nds32__mfsr(NDS32_SR_CACHE_CTL); + tmp &= ~(CACHE_CTL_mskIC_EN | CACHE_CTL_mskDC_EN); + __nds32__mtsr_isb(tmp, NDS32_SR_CACHE_CTL); + cpu_dcache_wbinval_all(); + cpu_icache_inval_all(); + + __asm__ __volatile__("jr.toff %0\n\t"::"r"(reset)); +} + +void cpu_switch_mm(struct mm_struct *mm) +{ + unsigned long cid; + cid = __nds32__mfsr(NDS32_SR_TLB_MISC); + cid = (cid & ~TLB_MISC_mskCID) | mm->context.id; + __nds32__mtsr_dsb(cid, NDS32_SR_TLB_MISC); + __nds32__mtsr_isb(__pa(mm->pgd), NDS32_SR_L1_PPTB); +} diff --git a/arch/nds32/mm/tlb.c b/arch/nds32/mm/tlb.c new file mode 100644 index 000000000..dd41f5e07 --- /dev/null +++ b/arch/nds32/mm/tlb.c @@ -0,0 +1,50 @@ +// SPDX-License-Identifier: GPL-2.0 +// Copyright (C) 2005-2017 Andes Technology Corporation + +#include <linux/spinlock_types.h> +#include <linux/mm.h> +#include <linux/sched.h> +#include <asm/nds32.h> +#include <nds32_intrinsic.h> + +unsigned int cpu_last_cid = { TLB_MISC_mskCID + (2 << TLB_MISC_offCID) }; + +DEFINE_SPINLOCK(cid_lock); + +void local_flush_tlb_range(struct vm_area_struct *vma, + unsigned long start, unsigned long end) +{ + unsigned long flags, ocid, ncid; + + if ((end - start) > 0x400000) { + __nds32__tlbop_flua(); + __nds32__isb(); + return; + } + + spin_lock_irqsave(&cid_lock, flags); + ocid = __nds32__mfsr(NDS32_SR_TLB_MISC); + ncid = (ocid & ~TLB_MISC_mskCID) | vma->vm_mm->context.id; + __nds32__mtsr_dsb(ncid, NDS32_SR_TLB_MISC); + while (start < end) { + __nds32__tlbop_inv(start); + __nds32__isb(); + start += PAGE_SIZE; + } + __nds32__mtsr_dsb(ocid, NDS32_SR_TLB_MISC); + spin_unlock_irqrestore(&cid_lock, flags); +} + +void local_flush_tlb_page(struct vm_area_struct *vma, unsigned long addr) +{ + unsigned long flags, ocid, ncid; + + spin_lock_irqsave(&cid_lock, flags); + ocid = __nds32__mfsr(NDS32_SR_TLB_MISC); + ncid = (ocid & ~TLB_MISC_mskCID) | vma->vm_mm->context.id; + __nds32__mtsr_dsb(ncid, NDS32_SR_TLB_MISC); + __nds32__tlbop_inv(addr); + __nds32__isb(); + __nds32__mtsr_dsb(ocid, NDS32_SR_TLB_MISC); + spin_unlock_irqrestore(&cid_lock, flags); +} |