diff options
Diffstat (limited to 'arch/nios2/Kconfig')
| -rw-r--r-- | arch/nios2/Kconfig | 190 |
1 files changed, 190 insertions, 0 deletions
diff --git a/arch/nios2/Kconfig b/arch/nios2/Kconfig new file mode 100644 index 000000000..f4ad1138e --- /dev/null +++ b/arch/nios2/Kconfig @@ -0,0 +1,190 @@ +# SPDX-License-Identifier: GPL-2.0 +config NIOS2 + def_bool y + select ARCH_HAS_SYNC_DMA_FOR_CPU + select ARCH_HAS_SYNC_DMA_FOR_DEVICE + select ARCH_NO_SWAP + select DMA_NONCOHERENT_OPS + select TIMER_OF + select GENERIC_ATOMIC64 + select GENERIC_CLOCKEVENTS + select GENERIC_CPU_DEVICES + select GENERIC_IRQ_PROBE + select GENERIC_IRQ_SHOW + select GENERIC_STRNCPY_FROM_USER + select GENERIC_STRNLEN_USER + select HAVE_ARCH_TRACEHOOK + select HAVE_ARCH_KGDB + select IRQ_DOMAIN + select MODULES_USE_ELF_RELA + select OF + select OF_EARLY_FLATTREE + select SOC_BUS + select SPARSE_IRQ + select USB_ARCH_HAS_HCD if USB_SUPPORT + select CPU_NO_EFFICIENT_FFS + +config GENERIC_CSUM + def_bool y + +config GENERIC_HWEIGHT + def_bool y + +config GENERIC_CALIBRATE_DELAY + def_bool y + +config NO_IOPORT_MAP + def_bool y + +config HAS_DMA + def_bool y + +config FPU + def_bool n + +config RWSEM_GENERIC_SPINLOCK + def_bool y + +config TRACE_IRQFLAGS_SUPPORT + def_bool n + +menu "Kernel features" + +source "kernel/Kconfig.hz" + +config FORCE_MAX_ZONEORDER + int "Maximum zone order" + range 9 20 + default "11" + help + The kernel memory allocator divides physically contiguous memory + blocks into "zones", where each zone is a power of two number of + pages. This option selects the largest power of two that the kernel + keeps in the memory allocator. If you need to allocate very large + blocks of physically contiguous memory, then you may need to + increase this value. + + This config option is actually maximum order plus one. For example, + a value of 11 means that the largest free memory block is 2^10 pages. + +endmenu + +source "arch/nios2/platform/Kconfig.platform" + +menu "Processor type and features" + +config MMU + def_bool y + +config NR_CPUS + int + default "1" + +config NIOS2_ALIGNMENT_TRAP + bool "Catch alignment trap" + default y + help + Nios II CPUs cannot fetch/store data which is not bus aligned, + i.e., a 2 or 4 byte fetch must start at an address divisible by + 2 or 4. Any non-aligned load/store instructions will be trapped and + emulated in software if you say Y here, which has a performance + impact. + +comment "Boot options" + +config CMDLINE_BOOL + bool "Default bootloader kernel arguments" + default y + +config CMDLINE + string "Default kernel command string" + default "" + depends on CMDLINE_BOOL + help + On some platforms, there is currently no way for the boot loader to + pass arguments to the kernel. For these platforms, you can supply + some command-line options at build time by entering them here. In + other cases you can specify kernel args so that you don't have + to set them up in board prom initialization routines. + +config CMDLINE_FORCE + bool "Force default kernel command string" + depends on CMDLINE_BOOL + help + Set this to have arguments from the default kernel command string + override those passed by the boot loader. + +config NIOS2_CMDLINE_IGNORE_DTB + bool "Ignore kernel command string from DTB" + depends on CMDLINE_BOOL + depends on !CMDLINE_FORCE + default y + help + Set this to ignore the bootargs property from the devicetree's + chosen node and fall back to CMDLINE if nothing is passed. + +config NIOS2_PASS_CMDLINE + bool "Passed kernel command line from u-boot" + default n + help + Use bootargs env variable from u-boot for kernel command line. + will override "Default kernel command string". + Say N if you are unsure. + +config NIOS2_BOOT_LINK_OFFSET + hex "Link address offset for booting" + default "0x00500000" + 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. + +endmenu + +menu "Advanced setup" + +config ADVANCED_OPTIONS + bool "Prompt for advanced kernel configuration options" + +comment "Default settings for advanced configuration options are used" + depends on !ADVANCED_OPTIONS + +config NIOS2_KERNEL_MMU_REGION_BASE_BOOL + bool "Set custom kernel MMU region base address" + depends on ADVANCED_OPTIONS + help + This option allows you to set the virtual address of the kernel MMU region. + + Say N here unless you know what you are doing. + +config NIOS2_KERNEL_MMU_REGION_BASE + hex "Virtual base address of the kernel MMU region " if NIOS2_KERNEL_MMU_REGION_BASE_BOOL + default "0x80000000" + help + This option allows you to set the virtual base address of the kernel MMU region. + +config NIOS2_KERNEL_REGION_BASE_BOOL + bool "Set custom kernel region base address" + depends on ADVANCED_OPTIONS + help + This option allows you to set the virtual address of the kernel region. + + Say N here unless you know what you are doing. + +config NIOS2_KERNEL_REGION_BASE + hex "Virtual base address of the kernel region " if NIOS2_KERNEL_REGION_BASE_BOOL + default "0xc0000000" + +config NIOS2_IO_REGION_BASE_BOOL + bool "Set custom I/O region base address" + depends on ADVANCED_OPTIONS + help + This option allows you to set the virtual address of the I/O region. + + Say N here unless you know what you are doing. + +config NIOS2_IO_REGION_BASE + hex "Virtual base address of the I/O region" if NIOS2_IO_REGION_BASE_BOOL + default "0xe0000000" + +endmenu |