arch/nios2/Kconfig

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