# SPDX-License-Identifier: GPL-2.0 config NIOS2 def_bool y select ARCH_32BIT_OFF_T select ARCH_HAS_DMA_PREP_COHERENT select ARCH_HAS_SYNC_DMA_FOR_CPU select ARCH_HAS_SYNC_DMA_FOR_DEVICE select ARCH_HAS_DMA_SET_UNCACHED select ARCH_NO_SWAP select COMMON_CLK select TIMER_OF select GENERIC_ATOMIC64 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 select MMU_GATHER_NO_RANGE if MMU select SET_FS 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 FPU 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" 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