arch/nios2/Kconfig

   1 # SPDX-License-Identifier: GPL-2.0
   2 config NIOS2
   3         def_bool y
   4         select TIMER_OF
   5         select GENERIC_ATOMIC64
   6         select GENERIC_CLOCKEVENTS
   7         select GENERIC_CPU_DEVICES
   8         select GENERIC_IRQ_PROBE
   9         select GENERIC_IRQ_SHOW
  10         select GENERIC_STRNCPY_FROM_USER
  11         select GENERIC_STRNLEN_USER
  12         select HAVE_ARCH_TRACEHOOK
  13         select HAVE_ARCH_KGDB
  14         select IRQ_DOMAIN
  15         select MODULES_USE_ELF_RELA
  16         select OF
  17         select OF_EARLY_FLATTREE
  18         select SOC_BUS
  19         select SPARSE_IRQ
  20         select USB_ARCH_HAS_HCD if USB_SUPPORT
  21         select CPU_NO_EFFICIENT_FFS
  22
  23 config GENERIC_CSUM
  24         def_bool y
  25
  26 config GENERIC_HWEIGHT
  27         def_bool y
  28
  29 config GENERIC_CALIBRATE_DELAY
  30         def_bool y
  31
  32 config NO_IOPORT_MAP
  33         def_bool y
  34
  35 config HAS_DMA
  36         def_bool y
  37
  38 config FPU
  39         def_bool n
  40
  41 config SWAP
  42         def_bool n
  43
  44 config RWSEM_GENERIC_SPINLOCK
  45         def_bool y
  46
  47 config TRACE_IRQFLAGS_SUPPORT
  48         def_bool n
  49
  50 source "init/Kconfig"
  51
  52 menu "Kernel features"
  53
  54 source "kernel/Kconfig.preempt"
  55
  56 source "kernel/Kconfig.freezer"
  57
  58 source "kernel/Kconfig.hz"
  59
  60 source "mm/Kconfig"
  61
  62 config FORCE_MAX_ZONEORDER
  63         int "Maximum zone order"
  64         range 9 20
  65         default "11"
  66         help
  67           The kernel memory allocator divides physically contiguous memory
  68           blocks into "zones", where each zone is a power of two number of
  69           pages.  This option selects the largest power of two that the kernel
  70           keeps in the memory allocator.  If you need to allocate very large
  71           blocks of physically contiguous memory, then you may need to
  72           increase this value.
  73
  74           This config option is actually maximum order plus one. For example,
  75           a value of 11 means that the largest free memory block is 2^10 pages.
  76
  77 endmenu
  78
  79 source "arch/nios2/platform/Kconfig.platform"
  80
  81 menu "Processor type and features"
  82
  83 config MMU
  84         def_bool y
  85
  86 config NR_CPUS
  87         int
  88         default "1"
  89
  90 config NIOS2_ALIGNMENT_TRAP
  91         bool "Catch alignment trap"
  92         default y
  93         help
  94           Nios II CPUs cannot fetch/store data which is not bus aligned,
  95           i.e., a 2 or 4 byte fetch must start at an address divisible by
  96           2 or 4. Any non-aligned load/store instructions will be trapped and
  97           emulated in software if you say Y here, which has a performance
  98           impact.
  99
 100 comment "Boot options"
 101
 102 config CMDLINE_BOOL
 103         bool "Default bootloader kernel arguments"
 104         default y
 105
 106 config CMDLINE
 107         string "Default kernel command string"
 108         default ""
 109         depends on CMDLINE_BOOL
 110         help
 111           On some platforms, there is currently no way for the boot loader to
 112           pass arguments to the kernel. For these platforms, you can supply
 113           some command-line options at build time by entering them here.  In
 114           other cases you can specify kernel args so that you don't have
 115           to set them up in board prom initialization routines.
 116
 117 config CMDLINE_FORCE
 118         bool "Force default kernel command string"
 119         depends on CMDLINE_BOOL
 120         help
 121           Set this to have arguments from the default kernel command string
 122           override those passed by the boot loader.
 123
 124 config NIOS2_CMDLINE_IGNORE_DTB
 125         bool "Ignore kernel command string from DTB"
 126         depends on CMDLINE_BOOL
 127         depends on !CMDLINE_FORCE
 128         default y
 129         help
 130           Set this to ignore the bootargs property from the devicetree's
 131           chosen node and fall back to CMDLINE if nothing is passed.
 132
 133 config NIOS2_PASS_CMDLINE
 134         bool "Passed kernel command line from u-boot"
 135         default n
 136         help
 137           Use bootargs env variable from u-boot for kernel command line.
 138           will override "Default kernel command string".
 139           Say N if you are unsure.
 140
 141 config NIOS2_BOOT_LINK_OFFSET
 142         hex "Link address offset for booting"
 143         default "0x00500000"
 144         help
 145           This option allows you to set the link address offset of the zImage.
 146           This can be useful if you are on a board which has a small amount of
 147           memory.
 148
 149 endmenu
 150
 151 menu "Advanced setup"
 152
 153 config ADVANCED_OPTIONS
 154         bool "Prompt for advanced kernel configuration options"
 155         help
 156
 157 comment "Default settings for advanced configuration options are used"
 158         depends on !ADVANCED_OPTIONS
 159
 160 config NIOS2_KERNEL_MMU_REGION_BASE_BOOL
 161         bool "Set custom kernel MMU region base address"
 162         depends on ADVANCED_OPTIONS
 163         help
 164           This option allows you to set the virtual address of the kernel MMU region.
 165
 166           Say N here unless you know what you are doing.
 167
 168 config NIOS2_KERNEL_MMU_REGION_BASE
 169         hex "Virtual base address of the kernel MMU region " if NIOS2_KERNEL_MMU_REGION_BASE_BOOL
 170         default "0x80000000"
 171         help
 172           This option allows you to set the virtual base address of the kernel MMU region.
 173
 174 config NIOS2_KERNEL_REGION_BASE_BOOL
 175         bool "Set custom kernel region base address"
 176         depends on ADVANCED_OPTIONS
 177         help
 178           This option allows you to set the virtual address of the kernel region.
 179
 180           Say N here unless you know what you are doing.
 181
 182 config NIOS2_KERNEL_REGION_BASE
 183         hex "Virtual base address of the kernel region " if NIOS2_KERNEL_REGION_BASE_BOOL
 184         default "0xc0000000"
 185
 186 config NIOS2_IO_REGION_BASE_BOOL
 187         bool "Set custom I/O region base address"
 188         depends on ADVANCED_OPTIONS
 189         help
 190           This option allows you to set the virtual address of the I/O region.
 191
 192           Say N here unless you know what you are doing.
 193
 194 config NIOS2_IO_REGION_BASE
 195         hex "Virtual base address of the I/O region" if NIOS2_IO_REGION_BASE_BOOL
 196         default "0xe0000000"
 197
 198 endmenu
 199
 200 menu "Executable file formats"
 201
 202 source "fs/Kconfig.binfmt"
 203
 204 endmenu
 205
 206 source "net/Kconfig"
 207
 208 source "drivers/Kconfig"
 209
 210 source "fs/Kconfig"
 211
 212 source "arch/nios2/Kconfig.debug"
 213
 214 source "security/Kconfig"
 215
 216 source "crypto/Kconfig"
 217
 218 source "lib/Kconfig"