# Endianness selection
choice
prompt "Endianness selection" default CPU_LITTLE_ENDIAN
help
microblaze architectures can be configured for either little or
big endian formats. Be sure to select the appropriate mode.
config CMDLINE
string "Default kernel command string"
depends on CMDLINE_BOOL default"console=ttyUL0,115200"
help
On some architectures there is currently no way for the boot loader
to pass arguments to the kernel. For these architectures, you should
supply some command-line options at build time by entering them
here.
config CMDLINE_FORCE bool"Force default kernel command string"
depends on CMDLINE_BOOL default n
help
Set this to have arguments from the default kernel command string
override those passed by the boot loader.
endmenu
menu "Kernel features"
config NR_CPUS int default"1"
config ADVANCED_OPTIONS bool"Prompt for advanced kernel configuration options"
help This option will enable prompting for a variety of advanced kernel
configuration options. These options can cause the kernel to not
work if they are set incorrectly, but can be used to optimize certain
aspects of kernel memory management.
Unless you know what you are doing, say N here.
comment "Default settings for advanced configuration options are used"
depends on !ADVANCED_OPTIONS
config HIGHMEM bool"High memory support"
select KMAP_LOCAL
help
The address space of Microblaze 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".
If unsure, say n.
config LOWMEM_SIZE_BOOL bool"Set maximum low memory"
depends on ADVANCED_OPTIONS
help This option allows you to set the maximum amount of memory which
will be used as "low memory", that is, memory which the kernel can
access directly, without having to set up a kernel virtual mapping. This can be useful in optimizing the layout of kernel virtual
memory.
config MANUAL_RESET_VECTOR
hex "Microblaze reset vector address setup" default"0x0"
help
Set this option to have the kernel override the CPU Reset vector. If zero, no change will be made to the MicroBlaze reset vector at
address 0x0. If non-zero, a jump instruction to this address, will be written
to the reset vector at address 0x0. If you are unsure, set it to default value 0x0.
config KERNEL_START_BOOL bool"Set custom kernel base address"
depends on ADVANCED_OPTIONS
help This option allows you to set the kernel virtual address at which
the kernel will map low memory (the kernel image will be linked at this address). This can be useful in optimizing the virtual memory
layout of the system.
Say N here unless you know what you are doing.
config KERNEL_START
hex "Virtual address of kernel base"if KERNEL_START_BOOL default"0xc0000000"
config TASK_SIZE_BOOL bool"Set custom user task size"
depends on ADVANCED_OPTIONS
help This option allows you to set the amount of virtual address space
allocated to user tasks. This can be useful in optimizing the virtual memory layout of the system.
Say N here unless you know what you are doing.
config TASK_SIZE
hex "Size of user task space"if TASK_SIZE_BOOL default"0x80000000"
config MB_MANAGER bool"Support for Microblaze Manager"
depends on ADVANCED_OPTIONS
help This option enables API for configuring the MicroBlaze manager
control register, which is consumed by the break handler to
block the break.
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