config ARCH_FORCE_MAX_ORDER int"Order of maximal physically contiguous allocations" default"10"
help
The kernel page allocator limits the size of maximal physically
contiguous allocations. The limit is called MAX_PAGE_ORDER and it
defines the maximal power of two of number of pages that can be
allocated as a single contiguous block. This option allows
overriding the default setting when ability to allocate very
large blocks of physically contiguous memory is required.
Don't change if unsure.
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
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