# SPDX-License-Identifier: GPL-2.0-only
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config MICROBLAZE
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def_bool y
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select ARCH_32BIT_OFF_T
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select ARCH_NO_SWAP
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select ARCH_HAS_BINFMT_FLAT if !MMU
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select ARCH_HAS_DMA_PREP_COHERENT
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select ARCH_HAS_GCOV_PROFILE_ALL
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select ARCH_HAS_SYNC_DMA_FOR_CPU
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select ARCH_HAS_SYNC_DMA_FOR_DEVICE
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select ARCH_HAS_DMA_SET_UNCACHED if !MMU
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select ARCH_MIGHT_HAVE_PC_PARPORT
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select ARCH_WANT_IPC_PARSE_VERSION
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select BUILDTIME_TABLE_SORT
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select TIMER_OF
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select CLONE_BACKWARDS3
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select COMMON_CLK
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select DMA_DIRECT_REMAP if MMU
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select GENERIC_ATOMIC64
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select GENERIC_CLOCKEVENTS
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select GENERIC_CPU_DEVICES
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select GENERIC_IDLE_POLL_SETUP
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select GENERIC_IRQ_PROBE
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select GENERIC_IRQ_SHOW
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select GENERIC_PCI_IOMAP
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select GENERIC_SCHED_CLOCK
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select HAVE_ARCH_HASH
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select HAVE_ARCH_KGDB
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select HAVE_ARCH_SECCOMP
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select HAVE_DEBUG_KMEMLEAK
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select HAVE_DMA_CONTIGUOUS
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select HAVE_DYNAMIC_FTRACE
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select HAVE_FTRACE_MCOUNT_RECORD
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select HAVE_FUNCTION_GRAPH_TRACER
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select HAVE_FUNCTION_TRACER
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select HAVE_OPROFILE
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select HAVE_PCI
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select IRQ_DOMAIN
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select XILINX_INTC
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select MODULES_USE_ELF_RELA
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select OF
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select OF_EARLY_FLATTREE
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select PCI_DOMAINS_GENERIC if PCI
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select PCI_SYSCALL if PCI
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select TRACING_SUPPORT
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select VIRT_TO_BUS
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select CPU_NO_EFFICIENT_FFS
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select MMU_GATHER_NO_RANGE if MMU
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select SPARSE_IRQ
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select SET_FS
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# Endianness selection
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choice
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prompt "Endianness selection"
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default CPU_LITTLE_ENDIAN
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help
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microblaze architectures can be configured for either little or
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big endian formats. Be sure to select the appropriate mode.
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config CPU_BIG_ENDIAN
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bool "Big endian"
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config CPU_LITTLE_ENDIAN
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bool "Little endian"
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endchoice
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config ZONE_DMA
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def_bool y
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config ARCH_HAS_ILOG2_U32
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def_bool n
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config ARCH_HAS_ILOG2_U64
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def_bool n
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config GENERIC_HWEIGHT
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def_bool y
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config GENERIC_CALIBRATE_DELAY
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def_bool y
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config GENERIC_CSUM
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def_bool y
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config STACKTRACE_SUPPORT
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def_bool y
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config LOCKDEP_SUPPORT
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def_bool y
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source "arch/microblaze/Kconfig.platform"
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menu "Processor type and features"
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source "kernel/Kconfig.hz"
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config MMU
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bool "MMU support"
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default n
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comment "Boot options"
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config CMDLINE_BOOL
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bool "Default bootloader kernel arguments"
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config CMDLINE
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string "Default kernel command string"
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depends on CMDLINE_BOOL
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default "console=ttyUL0,115200"
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help
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On some architectures there is currently no way for the boot loader
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to pass arguments to the kernel. For these architectures, you should
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supply some command-line options at build time by entering them
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here.
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config CMDLINE_FORCE
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bool "Force default kernel command string"
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depends on CMDLINE_BOOL
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default n
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help
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Set this to have arguments from the default kernel command string
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override those passed by the boot loader.
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endmenu
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menu "Kernel features"
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config NR_CPUS
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int
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default "1"
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config ADVANCED_OPTIONS
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bool "Prompt for advanced kernel configuration options"
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help
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This option will enable prompting for a variety of advanced kernel
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configuration options. These options can cause the kernel to not
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work if they are set incorrectly, but can be used to optimize certain
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aspects of kernel memory management.
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Unless you know what you are doing, say N here.
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comment "Default settings for advanced configuration options are used"
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depends on !ADVANCED_OPTIONS
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config XILINX_UNCACHED_SHADOW
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bool "Are you using uncached shadow for RAM ?"
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depends on ADVANCED_OPTIONS && !MMU
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default n
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help
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This is needed to be able to allocate uncachable memory regions.
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The feature requires the design to define the RAM memory controller
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window to be twice as large as the actual physical memory.
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config HIGHMEM
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bool "High memory support"
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depends on MMU
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help
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The address space of Microblaze processors is only 4 Gigabytes large
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and it has to accommodate user address space, kernel address
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space as well as some memory mapped IO. That means that, if you
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have a large amount of physical memory and/or IO, not all of the
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memory can be "permanently mapped" by the kernel. The physical
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memory that is not permanently mapped is called "high memory".
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If unsure, say n.
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config LOWMEM_SIZE_BOOL
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bool "Set maximum low memory"
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depends on ADVANCED_OPTIONS && MMU
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help
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This option allows you to set the maximum amount of memory which
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will be used as "low memory", that is, memory which the kernel can
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access directly, without having to set up a kernel virtual mapping.
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This can be useful in optimizing the layout of kernel virtual
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memory.
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Say N here unless you know what you are doing.
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config LOWMEM_SIZE
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hex "Maximum low memory size (in bytes)" if LOWMEM_SIZE_BOOL
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default "0x30000000"
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config MANUAL_RESET_VECTOR
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hex "Microblaze reset vector address setup"
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default "0x0"
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help
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Set this option to have the kernel override the CPU Reset vector.
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If zero, no change will be made to the MicroBlaze reset vector at
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address 0x0.
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If non-zero, a jump instruction to this address, will be written
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to the reset vector at address 0x0.
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If you are unsure, set it to default value 0x0.
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config KERNEL_START_BOOL
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bool "Set custom kernel base address"
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depends on ADVANCED_OPTIONS
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help
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This option allows you to set the kernel virtual address at which
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the kernel will map low memory (the kernel image will be linked at
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this address). This can be useful in optimizing the virtual memory
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layout of the system.
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Say N here unless you know what you are doing.
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config KERNEL_START
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hex "Virtual address of kernel base" if KERNEL_START_BOOL
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default "0xc0000000" if MMU
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default KERNEL_BASE_ADDR if !MMU
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config TASK_SIZE_BOOL
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bool "Set custom user task size"
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depends on ADVANCED_OPTIONS && MMU
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help
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This option allows you to set the amount of virtual address space
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allocated to user tasks. This can be useful in optimizing the
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virtual memory layout of the system.
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Say N here unless you know what you are doing.
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config TASK_SIZE
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hex "Size of user task space" if TASK_SIZE_BOOL
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default "0x80000000"
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choice
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prompt "Page size"
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default MICROBLAZE_4K_PAGES
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depends on ADVANCED_OPTIONS && !MMU
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help
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Select the kernel logical page size. Increasing the page size
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will reduce software overhead at each page boundary, allow
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hardware prefetch mechanisms to be more effective, and allow
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larger dma transfers increasing IO efficiency and reducing
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overhead. However the utilization of memory will increase.
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For example, each cached file will using a multiple of the
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page size to hold its contents and the difference between the
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end of file and the end of page is wasted.
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If unsure, choose 4K_PAGES.
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config MICROBLAZE_4K_PAGES
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bool "4k page size"
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config MICROBLAZE_16K_PAGES
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bool "16k page size"
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config MICROBLAZE_64K_PAGES
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bool "64k page size"
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endchoice
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endmenu
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menu "Bus Options"
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config PCI_XILINX
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bool "Xilinx PCI host bridge support"
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depends on PCI
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endmenu
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