diff options
Diffstat (limited to '')
| -rw-r--r-- | arch/sh/Kconfig | 795 | ||||
| -rw-r--r-- | arch/sh/Kconfig.cpu | 100 | ||||
| -rw-r--r-- | arch/sh/Kconfig.debug | 89 |
3 files changed, 984 insertions, 0 deletions
diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig new file mode 100644 index 000000000..a0593f6ce --- /dev/null +++ b/arch/sh/Kconfig @@ -0,0 +1,795 @@ +# SPDX-License-Identifier: GPL-2.0 +config SUPERH + def_bool y + select ARCH_32BIT_OFF_T + select ARCH_ENABLE_MEMORY_HOTPLUG if SPARSEMEM && MMU + select ARCH_ENABLE_MEMORY_HOTREMOVE if SPARSEMEM && MMU + select ARCH_HAVE_CUSTOM_GPIO_H + select ARCH_HAVE_NMI_SAFE_CMPXCHG if (GUSA_RB || CPU_SH4A) + select ARCH_HAS_BINFMT_FLAT if !MMU + select ARCH_HAS_CPU_FINALIZE_INIT + select ARCH_HAS_CURRENT_STACK_POINTER + select ARCH_HAS_GIGANTIC_PAGE + select ARCH_HAS_GCOV_PROFILE_ALL + select ARCH_HAS_PTE_SPECIAL + select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST + select ARCH_HIBERNATION_POSSIBLE if MMU + select ARCH_MIGHT_HAVE_PC_PARPORT + select ARCH_WANT_IPC_PARSE_VERSION + select CPU_NO_EFFICIENT_FFS + select DMA_DECLARE_COHERENT + select GENERIC_ATOMIC64 + select GENERIC_CMOS_UPDATE if SH_SH03 || SH_DREAMCAST + select GENERIC_IDLE_POLL_SETUP + select GENERIC_IRQ_SHOW + select GENERIC_PCI_IOMAP if PCI + select GENERIC_SCHED_CLOCK + select GENERIC_SMP_IDLE_THREAD + select GUP_GET_PTE_LOW_HIGH if X2TLB + select HAVE_ARCH_AUDITSYSCALL + select HAVE_ARCH_KGDB + select HAVE_ARCH_SECCOMP_FILTER + select HAVE_ARCH_TRACEHOOK + select HAVE_DEBUG_BUGVERBOSE + select HAVE_DEBUG_KMEMLEAK + select HAVE_DYNAMIC_FTRACE + select HAVE_FAST_GUP if MMU + select HAVE_FUNCTION_GRAPH_TRACER + select HAVE_FUNCTION_TRACER + select HAVE_FTRACE_MCOUNT_RECORD + select HAVE_HW_BREAKPOINT + select HAVE_IOREMAP_PROT if MMU && !X2TLB + select HAVE_KERNEL_BZIP2 + select HAVE_KERNEL_GZIP + select HAVE_KERNEL_LZMA + select HAVE_KERNEL_LZO + select HAVE_KERNEL_XZ + select HAVE_KPROBES + select HAVE_KRETPROBES + select HAVE_MIXED_BREAKPOINTS_REGS + select HAVE_MOD_ARCH_SPECIFIC if DWARF_UNWINDER + select HAVE_NMI + select HAVE_PATA_PLATFORM + select HAVE_PERF_EVENTS + select HAVE_REGS_AND_STACK_ACCESS_API + select HAVE_UID16 + select HAVE_SOFTIRQ_ON_OWN_STACK if IRQSTACKS + select HAVE_STACKPROTECTOR + select HAVE_SYSCALL_TRACEPOINTS + select IRQ_FORCED_THREADING + select LOCK_MM_AND_FIND_VMA + select MODULES_USE_ELF_RELA + select NEED_SG_DMA_LENGTH + select NO_DMA if !MMU && !DMA_COHERENT + select NO_GENERIC_PCI_IOPORT_MAP if PCI + select OLD_SIGACTION + select OLD_SIGSUSPEND + select PCI_DOMAINS if PCI + select PERF_EVENTS + select PERF_USE_VMALLOC + select RTC_LIB + select SPARSE_IRQ + select TRACE_IRQFLAGS_SUPPORT + help + The SuperH is a RISC processor targeted for use in embedded systems + and consumer electronics; it was also used in the Sega Dreamcast + gaming console. The SuperH port has a home page at + <http://www.linux-sh.org/>. + +config GENERIC_BUG + def_bool y + depends on BUG + +config GENERIC_HWEIGHT + def_bool y + +config GENERIC_CALIBRATE_DELAY + bool + +config GENERIC_LOCKBREAK + def_bool y + depends on SMP && PREEMPTION + +config ARCH_SUSPEND_POSSIBLE + def_bool n + +config ARCH_HIBERNATION_POSSIBLE + def_bool n + +config SYS_SUPPORTS_APM_EMULATION + bool + select ARCH_SUSPEND_POSSIBLE + +config SYS_SUPPORTS_SMP + bool + +config SYS_SUPPORTS_NUMA + bool + +config STACKTRACE_SUPPORT + def_bool y + +config LOCKDEP_SUPPORT + def_bool y + +config ARCH_HAS_ILOG2_U32 + def_bool n + +config ARCH_HAS_ILOG2_U64 + def_bool n + +config NO_IOPORT_MAP + def_bool !PCI + depends on !SH_SH4202_MICRODEV && !SH_SHMIN && !SH_HP6XX && \ + !SH_SOLUTION_ENGINE + +config IO_TRAPPED + bool + +config SWAP_IO_SPACE + bool + +config DMA_COHERENT + bool + +config DMA_NONCOHERENT + def_bool !NO_DMA && !DMA_COHERENT + select ARCH_HAS_DMA_PREP_COHERENT + select ARCH_HAS_SYNC_DMA_FOR_DEVICE + select DMA_DIRECT_REMAP + +config PGTABLE_LEVELS + default 3 if X2TLB + default 2 + +menu "System type" + +# +# Processor families +# +config CPU_SH2 + bool + select SH_INTC + +config CPU_SH2A + bool + select CPU_SH2 + select UNCACHED_MAPPING + +config CPU_J2 + bool + select CPU_SH2 + select OF + select OF_EARLY_FLATTREE + +config CPU_SH3 + bool + select CPU_HAS_INTEVT + select CPU_HAS_SR_RB + select SH_INTC + select SYS_SUPPORTS_SH_TMU + +config CPU_SH4 + bool + select ARCH_SUPPORTS_HUGETLBFS if MMU + select CPU_HAS_INTEVT + select CPU_HAS_SR_RB + select CPU_HAS_FPU if !CPU_SH4AL_DSP + select SH_INTC + select SYS_SUPPORTS_SH_TMU + +config CPU_SH4A + bool + select CPU_SH4 + +config CPU_SH4AL_DSP + bool + select CPU_SH4A + select CPU_HAS_DSP + +config CPU_SHX2 + bool + +config CPU_SHX3 + bool + select DMA_COHERENT + select SYS_SUPPORTS_SMP + select SYS_SUPPORTS_NUMA + +config ARCH_SHMOBILE + bool + select ARCH_SUSPEND_POSSIBLE + select PM + +config CPU_HAS_PMU + depends on CPU_SH4 || CPU_SH4A + default y + bool + +choice + prompt "Processor sub-type selection" + +# +# Processor subtypes +# + +# SH-2 Processor Support + +config CPU_SUBTYPE_SH7619 + bool "Support SH7619 processor" + select CPU_SH2 + select SYS_SUPPORTS_SH_CMT + +config CPU_SUBTYPE_J2 + bool "Support J2 processor" + select CPU_J2 + select SYS_SUPPORTS_SMP + select GENERIC_CLOCKEVENTS_BROADCAST if SMP + +# SH-2A Processor Support + +config CPU_SUBTYPE_SH7201 + bool "Support SH7201 processor" + select CPU_SH2A + select CPU_HAS_FPU + select SYS_SUPPORTS_SH_MTU2 + +config CPU_SUBTYPE_SH7203 + bool "Support SH7203 processor" + select CPU_SH2A + select CPU_HAS_FPU + select SYS_SUPPORTS_SH_CMT + select SYS_SUPPORTS_SH_MTU2 + select PINCTRL + +config CPU_SUBTYPE_SH7206 + bool "Support SH7206 processor" + select CPU_SH2A + select SYS_SUPPORTS_SH_CMT + select SYS_SUPPORTS_SH_MTU2 + +config CPU_SUBTYPE_SH7263 + bool "Support SH7263 processor" + select CPU_SH2A + select CPU_HAS_FPU + select SYS_SUPPORTS_SH_CMT + select SYS_SUPPORTS_SH_MTU2 + +config CPU_SUBTYPE_SH7264 + bool "Support SH7264 processor" + select CPU_SH2A + select CPU_HAS_FPU + select SYS_SUPPORTS_SH_CMT + select SYS_SUPPORTS_SH_MTU2 + select PINCTRL + +config CPU_SUBTYPE_SH7269 + bool "Support SH7269 processor" + select CPU_SH2A + select CPU_HAS_FPU + select SYS_SUPPORTS_SH_CMT + select SYS_SUPPORTS_SH_MTU2 + select PINCTRL + +config CPU_SUBTYPE_MXG + bool "Support MX-G processor" + select CPU_SH2A + select SYS_SUPPORTS_SH_MTU2 + help + Select MX-G if running on an R8A03022BG part. + +# SH-3 Processor Support + +config CPU_SUBTYPE_SH7705 + bool "Support SH7705 processor" + select CPU_SH3 + +config CPU_SUBTYPE_SH7706 + bool "Support SH7706 processor" + select CPU_SH3 + help + Select SH7706 if you have a 133 Mhz SH-3 HD6417706 CPU. + +config CPU_SUBTYPE_SH7707 + bool "Support SH7707 processor" + select CPU_SH3 + help + Select SH7707 if you have a 60 Mhz SH-3 HD6417707 CPU. + +config CPU_SUBTYPE_SH7708 + bool "Support SH7708 processor" + select CPU_SH3 + help + Select SH7708 if you have a 60 Mhz SH-3 HD6417708S or + if you have a 100 Mhz SH-3 HD6417708R CPU. + +config CPU_SUBTYPE_SH7709 + bool "Support SH7709 processor" + select CPU_SH3 + help + Select SH7709 if you have a 80 Mhz SH-3 HD6417709 CPU. + +config CPU_SUBTYPE_SH7710 + bool "Support SH7710 processor" + select CPU_SH3 + select CPU_HAS_DSP + help + Select SH7710 if you have a SH3-DSP SH7710 CPU. + +config CPU_SUBTYPE_SH7712 + bool "Support SH7712 processor" + select CPU_SH3 + select CPU_HAS_DSP + help + Select SH7712 if you have a SH3-DSP SH7712 CPU. + +config CPU_SUBTYPE_SH7720 + bool "Support SH7720 processor" + select CPU_SH3 + select CPU_HAS_DSP + select SYS_SUPPORTS_SH_CMT + select USB_OHCI_SH if USB_OHCI_HCD + select PINCTRL + help + Select SH7720 if you have a SH3-DSP SH7720 CPU. + +config CPU_SUBTYPE_SH7721 + bool "Support SH7721 processor" + select CPU_SH3 + select CPU_HAS_DSP + select SYS_SUPPORTS_SH_CMT + select USB_OHCI_SH if USB_OHCI_HCD + help + Select SH7721 if you have a SH3-DSP SH7721 CPU. + +# SH-4 Processor Support + +config CPU_SUBTYPE_SH7750 + bool "Support SH7750 processor" + select CPU_SH4 + help + Select SH7750 if you have a 200 Mhz SH-4 HD6417750 CPU. + +config CPU_SUBTYPE_SH7091 + bool "Support SH7091 processor" + select CPU_SH4 + help + Select SH7091 if you have an SH-4 based Sega device (such as + the Dreamcast, Naomi, and Naomi 2). + +config CPU_SUBTYPE_SH7750R + bool "Support SH7750R processor" + select CPU_SH4 + +config CPU_SUBTYPE_SH7750S + bool "Support SH7750S processor" + select CPU_SH4 + +config CPU_SUBTYPE_SH7751 + bool "Support SH7751 processor" + select CPU_SH4 + help + Select SH7751 if you have a 166 Mhz SH-4 HD6417751 CPU, + or if you have a HD6417751R CPU. + +config CPU_SUBTYPE_SH7751R + bool "Support SH7751R processor" + select CPU_SH4 + +config CPU_SUBTYPE_SH7760 + bool "Support SH7760 processor" + select CPU_SH4 + +config CPU_SUBTYPE_SH4_202 + bool "Support SH4-202 processor" + select CPU_SH4 + +# SH-4A Processor Support + +config CPU_SUBTYPE_SH7723 + bool "Support SH7723 processor" + select CPU_SH4A + select CPU_SHX2 + select ARCH_SHMOBILE + select ARCH_SPARSEMEM_ENABLE + select SYS_SUPPORTS_SH_CMT + select PINCTRL + help + Select SH7723 if you have an SH-MobileR2 CPU. + +config CPU_SUBTYPE_SH7724 + bool "Support SH7724 processor" + select CPU_SH4A + select CPU_SHX2 + select ARCH_SHMOBILE + select ARCH_SPARSEMEM_ENABLE + select SYS_SUPPORTS_SH_CMT + select PINCTRL + help + Select SH7724 if you have an SH-MobileR2R CPU. + +config CPU_SUBTYPE_SH7734 + bool "Support SH7734 processor" + select CPU_SH4A + select CPU_SHX2 + select PINCTRL + help + Select SH7734 if you have a SH4A SH7734 CPU. + +config CPU_SUBTYPE_SH7757 + bool "Support SH7757 processor" + select CPU_SH4A + select CPU_SHX2 + select PINCTRL + help + Select SH7757 if you have a SH4A SH7757 CPU. + +config CPU_SUBTYPE_SH7763 + bool "Support SH7763 processor" + select CPU_SH4A + select USB_OHCI_SH if USB_OHCI_HCD + help + Select SH7763 if you have a SH4A SH7763(R5S77631) CPU. + +config CPU_SUBTYPE_SH7770 + bool "Support SH7770 processor" + select CPU_SH4A + +config CPU_SUBTYPE_SH7780 + bool "Support SH7780 processor" + select CPU_SH4A + +config CPU_SUBTYPE_SH7785 + bool "Support SH7785 processor" + select CPU_SH4A + select CPU_SHX2 + select ARCH_SPARSEMEM_ENABLE + select SYS_SUPPORTS_NUMA + select PINCTRL + +config CPU_SUBTYPE_SH7786 + bool "Support SH7786 processor" + select CPU_SH4A + select CPU_SHX3 + select CPU_HAS_PTEAEX + select GENERIC_CLOCKEVENTS_BROADCAST if SMP + select USB_OHCI_SH if USB_OHCI_HCD + select USB_EHCI_SH if USB_EHCI_HCD + select PINCTRL + +config CPU_SUBTYPE_SHX3 + bool "Support SH-X3 processor" + select CPU_SH4A + select CPU_SHX3 + select GENERIC_CLOCKEVENTS_BROADCAST if SMP + select GPIOLIB + select PINCTRL + +# SH4AL-DSP Processor Support + +config CPU_SUBTYPE_SH7343 + bool "Support SH7343 processor" + select CPU_SH4AL_DSP + select ARCH_SHMOBILE + select SYS_SUPPORTS_SH_CMT + +config CPU_SUBTYPE_SH7722 + bool "Support SH7722 processor" + select CPU_SH4AL_DSP + select CPU_SHX2 + select ARCH_SHMOBILE + select ARCH_SPARSEMEM_ENABLE + select SYS_SUPPORTS_NUMA + select SYS_SUPPORTS_SH_CMT + select PINCTRL + +config CPU_SUBTYPE_SH7366 + bool "Support SH7366 processor" + select CPU_SH4AL_DSP + select CPU_SHX2 + select ARCH_SHMOBILE + select ARCH_SPARSEMEM_ENABLE + select SYS_SUPPORTS_NUMA + select SYS_SUPPORTS_SH_CMT + +endchoice + +source "arch/sh/mm/Kconfig" + +source "arch/sh/Kconfig.cpu" + +source "arch/sh/boards/Kconfig" + +menu "Timer and clock configuration" + +config SH_PCLK_FREQ + int "Peripheral clock frequency (in Hz)" + depends on SH_CLK_CPG_LEGACY + default "31250000" if CPU_SUBTYPE_SH7619 + default "33333333" if CPU_SUBTYPE_SH7770 || \ + CPU_SUBTYPE_SH7760 || \ + CPU_SUBTYPE_SH7705 || \ + CPU_SUBTYPE_SH7203 || \ + CPU_SUBTYPE_SH7206 || \ + CPU_SUBTYPE_SH7263 || \ + CPU_SUBTYPE_MXG + default "60000000" if CPU_SUBTYPE_SH7751 || CPU_SUBTYPE_SH7751R + default "66000000" if CPU_SUBTYPE_SH4_202 + default "50000000" + help + This option is used to specify the peripheral clock frequency. + This is necessary for determining the reference clock value on + platforms lacking an RTC. + +config SH_CLK_CPG + def_bool y + +config SH_CLK_CPG_LEGACY + depends on SH_CLK_CPG + def_bool y if !CPU_SUBTYPE_SH7785 && !ARCH_SHMOBILE && \ + !CPU_SHX3 && !CPU_SUBTYPE_SH7757 && \ + !CPU_SUBTYPE_SH7734 && !CPU_SUBTYPE_SH7264 && \ + !CPU_SUBTYPE_SH7269 + +endmenu + +menu "CPU Frequency scaling" +source "drivers/cpufreq/Kconfig" +endmenu + +source "arch/sh/drivers/Kconfig" + +endmenu + +menu "Kernel features" + +source "kernel/Kconfig.hz" + +config KEXEC + bool "kexec system call (EXPERIMENTAL)" + depends on MMU + select KEXEC_CORE + help + kexec is a system call that implements the ability to shutdown your + current kernel, and to start another kernel. It is like a reboot + but it is independent of the system firmware. And like a reboot + you can start any kernel with it, not just Linux. + + The name comes from the similarity to the exec system call. + + It is an ongoing process to be certain the hardware in a machine + is properly shutdown, so do not be surprised if this code does not + initially work for you. As of this writing the exact hardware + interface is strongly in flux, so no good recommendation can be + made. + +config CRASH_DUMP + bool "kernel crash dumps (EXPERIMENTAL)" + depends on BROKEN_ON_SMP + help + Generate crash dump after being started by kexec. + This should be normally only set in special crash dump kernels + which are loaded in the main kernel with kexec-tools into + a specially reserved region and then later executed after + a crash by kdump/kexec. The crash dump kernel must be compiled + to a memory address not used by the main kernel using + PHYSICAL_START. + + For more details see Documentation/admin-guide/kdump/kdump.rst + +config KEXEC_JUMP + bool "kexec jump (EXPERIMENTAL)" + depends on KEXEC && HIBERNATION + help + Jump between original kernel and kexeced kernel and invoke + code via KEXEC + +config PHYSICAL_START + hex "Physical address where the kernel is loaded" if (EXPERT || CRASH_DUMP) + default MEMORY_START + help + This gives the physical address where the kernel is loaded + and is ordinarily the same as MEMORY_START. + + Different values are primarily used in the case of kexec on panic + where the fail safe kernel needs to run at a different address + than the panic-ed kernel. + +config SMP + bool "Symmetric multi-processing support" + depends on SYS_SUPPORTS_SMP + help + This enables support for systems with more than one CPU. If you have + a system with only one CPU, say N. If you have a system with more + than one CPU, say Y. + + If you say N here, the kernel will run on uni- and multiprocessor + machines, but will use only one CPU of a multiprocessor machine. If + you say Y here, the kernel will run on many, but not all, + uniprocessor machines. On a uniprocessor machine, the kernel + will run faster if you say N here. + + People using multiprocessor machines who say Y here should also say + Y to "Enhanced Real Time Clock Support", below. + + See also <file:Documentation/admin-guide/lockup-watchdogs.rst> and the SMP-HOWTO + available at <https://www.tldp.org/docs.html#howto>. + + If you don't know what to do here, say N. + +config NR_CPUS + int "Maximum number of CPUs (2-32)" + range 2 32 + depends on SMP + default "4" if CPU_SUBTYPE_SHX3 + default "2" + help + This allows you to specify the maximum number of CPUs which this + kernel will support. The maximum supported value is 32 and the + minimum value which makes sense is 2. + + This is purely to save memory - each supported CPU adds + approximately eight kilobytes to the kernel image. + +config HOTPLUG_CPU + bool "Support for hot-pluggable CPUs (EXPERIMENTAL)" + depends on SMP + help + Say Y here to experiment with turning CPUs off and on. CPUs + can be controlled through /sys/devices/system/cpu. + +config GUSA + def_bool y + depends on !SMP + help + This enables support for gUSA (general UserSpace Atomicity). + This is the default implementation for both UP and non-ll/sc + CPUs, and is used by the libc, amongst others. + + For additional information, design information can be found + in <http://lc.linux.or.jp/lc2002/papers/niibe0919p.pdf>. + + This should only be disabled for special cases where alternate + atomicity implementations exist. + +config GUSA_RB + bool "Implement atomic operations by roll-back (gRB) (EXPERIMENTAL)" + depends on GUSA && CPU_SH3 || (CPU_SH4 && !CPU_SH4A) + help + Enabling this option will allow the kernel to implement some + atomic operations using a software implementation of load-locked/ + store-conditional (LLSC). On machines which do not have hardware + LLSC, this should be more efficient than the other alternative of + disabling interrupts around the atomic sequence. + +config HW_PERF_EVENTS + bool "Enable hardware performance counter support for perf events" + depends on PERF_EVENTS && CPU_HAS_PMU + default y + help + Enable hardware performance counter support for perf events. If + disabled, perf events will use software events only. + +source "drivers/sh/Kconfig" + +endmenu + +menu "Boot options" + +config USE_BUILTIN_DTB + bool "Use builtin DTB" + default n + depends on SH_DEVICE_TREE + help + Link a device tree blob for particular hardware into the kernel, + suppressing use of the DTB pointer provided by the bootloader. + This option should only be used with legacy bootloaders that are + not capable of providing a DTB to the kernel, or for experimental + hardware without stable device tree bindings. + +config BUILTIN_DTB_SOURCE + string "Source file for builtin DTB" + default "" + depends on USE_BUILTIN_DTB + help + Base name (without suffix, relative to arch/sh/boot/dts) for the + a DTS file that will be used to produce the DTB linked into the + kernel. + +config ZERO_PAGE_OFFSET + hex + default "0x00010000" if PAGE_SIZE_64KB || SH_RTS7751R2D || \ + SH_7751_SOLUTION_ENGINE + default "0x00004000" if PAGE_SIZE_16KB || SH_SH03 + default "0x00002000" if PAGE_SIZE_8KB + default "0x00001000" + help + This sets the default offset of zero page. + +config BOOT_LINK_OFFSET + hex + default "0x00210000" if SH_SHMIN + default "0x00810000" if SH_7780_SOLUTION_ENGINE + default "0x009e0000" if SH_TITAN + default "0x01800000" if SH_SDK7780 + default "0x02000000" if SH_EDOSK7760 + default "0x00800000" + help + This option allows you to set the link address offset of the zImage. + This can be useful if you are on a board which has a small amount of + memory. + +config ENTRY_OFFSET + hex + default "0x00001000" if PAGE_SIZE_4KB + default "0x00002000" if PAGE_SIZE_8KB + default "0x00004000" if PAGE_SIZE_16KB + default "0x00010000" if PAGE_SIZE_64KB + default "0x00000000" + +config ROMIMAGE_MMCIF + bool "Include MMCIF loader in romImage (EXPERIMENTAL)" + depends on CPU_SUBTYPE_SH7724 + help + Say Y here to include experimental MMCIF loading code in + romImage. With this enabled it is possible to write the romImage + kernel image to an MMC card and boot the kernel straight from + the reset vector. At reset the processor Mask ROM will load the + first part of the romImage which in turn loads the rest the kernel + image to RAM using the MMCIF hardware block. + +choice + prompt "Kernel command line" + optional + default CMDLINE_OVERWRITE + help + Setting this option allows the kernel command line arguments + to be set. + +config CMDLINE_OVERWRITE + bool "Overwrite bootloader kernel arguments" + help + Given string will overwrite any arguments passed in by + a bootloader. + +config CMDLINE_EXTEND + bool "Extend bootloader kernel arguments" + help + Given string will be concatenated with arguments passed in + by a bootloader. + +endchoice + +config CMDLINE + string "Kernel command line arguments string" + depends on CMDLINE_OVERWRITE || CMDLINE_EXTEND + default "console=ttySC1,115200" + +endmenu + +menu "Bus options" + +config SUPERHYWAY + tristate "SuperHyway Bus support" + depends on CPU_SUBTYPE_SH4_202 + +config MAPLE + bool "Maple Bus support" + depends on SH_DREAMCAST + help + The Maple Bus is SEGA's serial communication bus for peripherals + on the Dreamcast. Without this bus support you won't be able to + get your Dreamcast keyboard etc to work, so most users + probably want to say 'Y' here, unless you are only using the + Dreamcast with a serial line terminal or a remote network + connection. + +endmenu + +menu "Power management options (EXPERIMENTAL)" + +source "kernel/power/Kconfig" + +source "drivers/cpuidle/Kconfig" + +endmenu diff --git a/arch/sh/Kconfig.cpu b/arch/sh/Kconfig.cpu new file mode 100644 index 000000000..fff419f3d --- /dev/null +++ b/arch/sh/Kconfig.cpu @@ -0,0 +1,100 @@ +# SPDX-License-Identifier: GPL-2.0 +menu "Processor features" + +choice + prompt "Endianness selection" + default CPU_LITTLE_ENDIAN + help + Some SuperH machines can be configured for either little or big + endian byte order. These modes require different kernels. + +config CPU_LITTLE_ENDIAN + bool "Little Endian" + +config CPU_BIG_ENDIAN + bool "Big Endian" + +endchoice + +config SH_FPU + def_bool y + prompt "FPU support" + depends on CPU_HAS_FPU + help + Selecting this option will enable support for SH processors that + have FPU units (ie, SH77xx). + + This option must be set in order to enable the FPU. + +config SH_FPU_EMU + def_bool n + prompt "FPU emulation support" + depends on !SH_FPU + help + Selecting this option will enable support for software FPU emulation. + Most SH-3 users will want to say Y here, whereas most SH-4 users will + want to say N. + +config SH_DSP + def_bool y + prompt "DSP support" + depends on CPU_HAS_DSP + help + Selecting this option will enable support for SH processors that + have DSP units (ie, SH2-DSP, SH3-DSP, and SH4AL-DSP). + + This option must be set in order to enable the DSP. + +config SH_ADC + def_bool y + prompt "ADC support" + depends on CPU_SH3 + help + Selecting this option will allow the Linux kernel to use SH3 on-chip + ADC module. + + If unsure, say N. + +config SH_STORE_QUEUES + bool "Support for Store Queues" + depends on CPU_SH4 + help + Selecting this option will enable an in-kernel API for manipulating + the store queues integrated in the SH-4 processors. + +config SPECULATIVE_EXECUTION + bool "Speculative subroutine return" + depends on CPU_SUBTYPE_SH7780 || CPU_SUBTYPE_SH7785 || CPU_SUBTYPE_SH7786 + help + This enables support for a speculative instruction fetch for + subroutine return. There are various pitfalls associated with + this, as outlined in the SH7780 hardware manual. + + If unsure, say N. + +config CPU_HAS_INTEVT + bool + +config CPU_HAS_IPR_IRQ + bool + +config CPU_HAS_SR_RB + bool + help + This will enable the use of SR.RB register bank usage. Processors + that are lacking this bit must have another method in place for + accomplishing what is taken care of by the banked registers. + + See <file:Documentation/sh/register-banks.rst> for further + information on SR.RB and register banking in the kernel in general. + +config CPU_HAS_PTEAEX + bool + +config CPU_HAS_DSP + bool + +config CPU_HAS_FPU + bool + +endmenu diff --git a/arch/sh/Kconfig.debug b/arch/sh/Kconfig.debug new file mode 100644 index 000000000..8bcd6c143 --- /dev/null +++ b/arch/sh/Kconfig.debug @@ -0,0 +1,89 @@ +# SPDX-License-Identifier: GPL-2.0 + +config SH_STANDARD_BIOS + bool "Use LinuxSH standard BIOS" + help + Say Y here if your target has the gdb-sh-stub + package from www.m17n.org (or any conforming standard LinuxSH BIOS) + in FLASH or EPROM. The kernel will use standard BIOS calls during + boot for various housekeeping tasks (including calls to read and + write characters to a system console, get a MAC address from an + on-board Ethernet interface, and shut down the hardware). Note this + does not work with machines with an existing operating system in + mask ROM and no flash (WindowsCE machines fall in this category). + If unsure, say N. + +config STACK_DEBUG + bool "Check for stack overflows" + depends on DEBUG_KERNEL && PRINTK + help + This option will cause messages to be printed if free stack space + drops below a certain limit. Saying Y here will add overhead to + every function call and will therefore incur a major + performance hit. Most users should say N. + +config EARLY_PRINTK + bool "Early printk" + depends on SH_STANDARD_BIOS + help + Say Y here to redirect kernel printk messages to the serial port + used by the SH-IPL bootloader, starting very early in the boot + process and ending when the kernel's serial console is initialised. + This option is only useful while porting the kernel to a new machine, + when the kernel may crash or hang before the serial console is + initialised. If unsure, say N. + +config 4KSTACKS + bool "Use 4Kb for kernel stacks instead of 8Kb" + depends on DEBUG_KERNEL && (MMU || BROKEN) && !PAGE_SIZE_64KB + help + If you say Y here the kernel will use a 4Kb stacksize for the + kernel stack attached to each process/thread. This facilitates + running more threads on a system and also reduces the pressure + on the VM subsystem for higher order allocations. This option + will also use IRQ stacks to compensate for the reduced stackspace. + +config IRQSTACKS + bool "Use separate kernel stacks when processing interrupts" + depends on DEBUG_KERNEL && BROKEN + help + If you say Y here the kernel will use separate kernel stacks + for handling hard and soft interrupts. This can help avoid + overflowing the process kernel stacks. + +config DUMP_CODE + bool "Show disassembly of nearby code in register dumps" + depends on DEBUG_KERNEL + default y if DEBUG_BUGVERBOSE + default n + help + This prints out a code trace of the instructions leading up to + the faulting instruction as a debugging aid. As this does grow + the kernel in size a bit, most users will want to say N here. + + Those looking for more verbose debugging output should say Y. + +config DWARF_UNWINDER + bool "Enable the DWARF unwinder for stacktraces" + depends on DEBUG_KERNEL + select FRAME_POINTER + default n + help + Enabling this option will make stacktraces more accurate, at + the cost of an increase in overall kernel size. + +config SH_NO_BSS_INIT + bool "Avoid zeroing BSS (to speed-up startup on suitable platforms)" + depends on DEBUG_KERNEL + default n + help + If running in painfully slow environments, such as an RTL + simulation or from remote memory via SHdebug, where the memory + can already be guaranteed to ber zeroed on boot, say Y. + + For all other cases, say N. If this option seems perplexing, or + you aren't sure, say N. + +config MCOUNT + def_bool y + depends on STACK_DEBUG || FUNCTION_TRACER |