arch/frv/Kconfig

   1 #
   2 # For a description of the syntax of this configuration file,
   3 # see Documentation/kbuild/kconfig-language.txt.
   4 #
   5 config FRV
   6         bool
   7         default y
   8
   9 config ZONE_DMA
  10         bool
  11         default y
  12
  13 config RWSEM_GENERIC_SPINLOCK
  14         bool
  15         default y
  16
  17 config RWSEM_XCHGADD_ALGORITHM
  18         bool
  19
  20 config GENERIC_FIND_NEXT_BIT
  21         bool
  22         default y
  23
  24 config GENERIC_HWEIGHT
  25         bool
  26         default y
  27
  28 config GENERIC_CALIBRATE_DELAY
  29         bool
  30         default n
  31
  32 config GENERIC_HARDIRQS
  33         bool
  34         default y
  35
  36 config GENERIC_HARDIRQS_NO__DO_IRQ
  37         bool
  38         default y
  39
  40 config GENERIC_TIME
  41         bool
  42         default y
  43
  44 config TIME_LOW_RES
  45         bool
  46         default y
  47
  48 config QUICKLIST
  49         bool
  50         default y
  51
  52 config ARCH_HAS_ILOG2_U32
  53         bool
  54         default y
  55
  56 config ARCH_HAS_ILOG2_U64
  57         bool
  58         default y
  59
  60 mainmenu "Fujitsu FR-V Kernel Configuration"
  61
  62 source "init/Kconfig"
  63
  64
  65 menu "Fujitsu FR-V system setup"
  66
  67 config MMU
  68         bool "MMU support"
  69         help
  70           This options switches on and off support for the FR-V MMU
  71           (effectively switching between vmlinux and uClinux). Not all FR-V
  72           CPUs support this. Currently only the FR451 has a sufficiently
  73           featured MMU.
  74
  75 config FRV_OUTOFLINE_ATOMIC_OPS
  76         bool "Out-of-line the FRV atomic operations"
  77         default n
  78         help
  79           Setting this option causes the FR-V atomic operations to be mostly
  80           implemented out-of-line.
  81
  82           See Documentation/fujitsu/frv/atomic-ops.txt for more information.
  83
  84 config HIGHMEM
  85         bool "High memory support"
  86         depends on MMU
  87         default y
  88         help
  89           If you wish to use more than 256MB of memory with your MMU based
  90           system, you will need to select this option. The kernel can only see
  91           the memory between 0xC0000000 and 0xD0000000 directly... everything
  92           else must be kmapped.
  93
  94           The arch is, however, capable of supporting up to 3GB of SDRAM.
  95
  96 config HIGHPTE
  97         bool "Allocate page tables in highmem"
  98         depends on HIGHMEM
  99         default y
 100         help
 101           The VM uses one page of memory for each page table.  For systems
 102           with a lot of RAM, this can be wasteful of precious low memory.
 103           Setting this option will put user-space page tables in high memory.
 104
 105 config LARGE_ALLOCS
 106         bool "Allow allocating large blocks (> 1MB) of memory"
 107         help
 108           Allow the slab memory allocator to keep chains for very large memory
 109           sizes - up to 32MB. You may need this if your system has a lot of
 110           RAM, and you need to able to allocate very large contiguous chunks.
 111           If unsure, say N.
 112
 113 source "mm/Kconfig"
 114
 115 choice
 116         prompt "uClinux kernel load address"
 117         depends on !MMU
 118         default UCPAGE_OFFSET_C0000000
 119         help
 120           This option sets the base address for the uClinux kernel. The kernel
 121           will rearrange the SDRAM layout to start at this address, and move
 122           itself to start there. It must be greater than 0, and it must be
 123           sufficiently less than 0xE0000000 that the SDRAM does not intersect
 124           the I/O region.
 125
 126           The base address must also be aligned such that the SDRAM controller
 127           can decode it. For instance, a 512MB SDRAM bank must be 512MB aligned.
 128
 129 config UCPAGE_OFFSET_20000000
 130        bool "0x20000000"
 131
 132 config UCPAGE_OFFSET_40000000
 133        bool "0x40000000"
 134
 135 config UCPAGE_OFFSET_60000000
 136        bool "0x60000000"
 137
 138 config UCPAGE_OFFSET_80000000
 139        bool "0x80000000"
 140
 141 config UCPAGE_OFFSET_A0000000
 142        bool "0xA0000000"
 143
 144 config UCPAGE_OFFSET_C0000000
 145        bool "0xC0000000 (Recommended)"
 146
 147 endchoice
 148
 149 config PROTECT_KERNEL
 150         bool "Protect core kernel against userspace"
 151         depends on !MMU
 152         default y
 153         help
 154           Selecting this option causes the uClinux kernel to change the
 155           permittivity of DAMPR register covering the core kernel image to
 156           prevent userspace accessing the underlying memory directly.
 157
 158 choice
 159         prompt "CPU Caching mode"
 160         default FRV_DEFL_CACHE_WBACK
 161         help
 162           This option determines the default caching mode for the kernel.
 163
 164           Write-Back caching mode involves the all reads and writes causing
 165           the affected cacheline to be read into the cache first before being
 166           operated upon. Memory is not then updated by a write until the cache
 167           is filled and a cacheline needs to be displaced from the cache to
 168           make room. Only at that point is it written back.
 169
 170           Write-Behind caching is similar to Write-Back caching, except that a
 171           write won't fetch a cacheline into the cache if there isn't already
 172           one there; it will write directly to memory instead.
 173
 174           Write-Through caching only fetches cachelines from memory on a
 175           read. Writes always get written directly to memory. If the affected
 176           cacheline is also in cache, it will be updated too.
 177
 178           The final option is to turn of caching entirely.
 179
 180           Note that not all CPUs support Write-Behind caching. If the CPU on
 181           which the kernel is running doesn't, it'll fall back to Write-Back
 182           caching.
 183
 184 config FRV_DEFL_CACHE_WBACK
 185         bool "Write-Back"
 186
 187 config FRV_DEFL_CACHE_WBEHIND
 188         bool "Write-Behind"
 189
 190 config FRV_DEFL_CACHE_WTHRU
 191         bool "Write-Through"
 192
 193 config FRV_DEFL_CACHE_DISABLED
 194         bool "Disabled"
 195
 196 endchoice
 197
 198 menu "CPU core support"
 199
 200 config CPU_FR401
 201         bool "Include FR401 core support"
 202         depends on !MMU
 203         default y
 204         help
 205           This enables support for the FR401, FR401A and FR403 CPUs
 206
 207 config CPU_FR405
 208         bool "Include FR405 core support"
 209         depends on !MMU
 210         default y
 211         help
 212           This enables support for the FR405 CPU
 213
 214 config CPU_FR451
 215         bool "Include FR451 core support"
 216         default y
 217         help
 218           This enables support for the FR451 CPU
 219
 220 config CPU_FR451_COMPILE
 221         bool "Specifically compile for FR451 core"
 222         depends on CPU_FR451 && !CPU_FR401 && !CPU_FR405 && !CPU_FR551
 223         default y
 224         help
 225           This causes appropriate flags to be passed to the compiler to
 226           optimise for the FR451 CPU
 227
 228 config CPU_FR551
 229         bool "Include FR551 core support"
 230         depends on !MMU
 231         default y
 232         help
 233           This enables support for the FR555 CPU
 234
 235 config CPU_FR551_COMPILE
 236         bool "Specifically compile for FR551 core"
 237         depends on CPU_FR551 && !CPU_FR401 && !CPU_FR405 && !CPU_FR451
 238         default y
 239         help
 240           This causes appropriate flags to be passed to the compiler to
 241           optimise for the FR555 CPU
 242
 243 config FRV_L1_CACHE_SHIFT
 244         int
 245         default "5" if CPU_FR401 || CPU_FR405 || CPU_FR451
 246         default "6" if CPU_FR551
 247
 248 endmenu
 249
 250 choice
 251         prompt "System support"
 252         default MB93091_VDK
 253
 254 config MB93091_VDK
 255         bool "MB93091 CPU board with or without motherboard"
 256
 257 config MB93093_PDK
 258         bool "MB93093 PDK unit"
 259
 260 endchoice
 261
 262 if MB93091_VDK
 263 choice
 264         prompt "Motherboard support"
 265         default MB93090_MB00
 266
 267 config MB93090_MB00
 268         bool "Use the MB93090-MB00 motherboard"
 269         help
 270           Select this option if the MB93091 CPU board is going to be used with
 271           a MB93090-MB00 VDK motherboard
 272
 273 config MB93091_NO_MB
 274         bool "Use standalone"
 275         help
 276           Select this option if the MB93091 CPU board is going to be used
 277           without a motherboard
 278
 279 endchoice
 280 endif
 281
 282 config FUJITSU_MB93493
 283         bool "MB93493 Multimedia chip"
 284         help
 285           Select this option if the MB93493 multimedia chip is going to be
 286           used.
 287
 288 choice
 289         prompt "GP-Relative data support"
 290         default GPREL_DATA_8
 291         help
 292           This option controls what data, if any, should be placed in the GP
 293           relative data sections. Using this means that the compiler can
 294           generate accesses to the data using GR16-relative addressing which
 295           is faster than absolute instructions and saves space (2 instructions
 296           per access).
 297
 298           However, the GPREL region is limited in size because the immediate
 299           value used in the load and store instructions is limited to a 12-bit
 300           signed number.
 301
 302           So if the linker starts complaining that accesses to GPREL data are
 303           out of range, try changing this option from the default.
 304
 305           Note that modules will always be compiled with this feature disabled
 306           as the module data will not be in range of the GP base address.
 307
 308 config GPREL_DATA_8
 309         bool "Put data objects of up to 8 bytes into GP-REL"
 310
 311 config GPREL_DATA_4
 312         bool "Put data objects of up to 4 bytes into GP-REL"
 313
 314 config GPREL_DATA_NONE
 315         bool "Don't use GP-REL"
 316
 317 endchoice
 318
 319 config FRV_ONCPU_SERIAL
 320         bool "Use on-CPU serial ports"
 321         select SERIAL_8250
 322         default y
 323
 324 config PCI
 325         bool "Use PCI"
 326         depends on MB93090_MB00
 327         default y
 328         help
 329           Some FR-V systems (such as the MB93090-MB00 VDK) have PCI
 330           onboard. If you have one of these boards and you wish to use the PCI
 331           facilities, say Y here.
 332
 333           The PCI-HOWTO, available from
 334           <http://www.tldp.org/docs.html#howto>, contains valuable
 335           information about which PCI hardware does work under Linux and which
 336           doesn't.
 337
 338 config RESERVE_DMA_COHERENT
 339         bool "Reserve DMA coherent memory"
 340         depends on PCI && !MMU
 341         default y
 342         help
 343           Many PCI drivers require access to uncached memory for DMA device
 344           communications (such as is done with some Ethernet buffer rings). If
 345           a fully featured MMU is available, this can be done through page
 346           table settings, but if not, a region has to be set aside and marked
 347           with a special DAMPR register.
 348
 349           Setting this option causes uClinux to set aside a portion of the
 350           available memory for use in this manner. The memory will then be
 351           unavailable for normal kernel use.
 352
 353 source "drivers/pci/Kconfig"
 354
 355 source "drivers/pcmcia/Kconfig"
 356
 357 #config MATH_EMULATION
 358 #       bool "Math emulation support (EXPERIMENTAL)"
 359 #       depends on EXPERIMENTAL
 360 #       help
 361 #         At some point in the future, this will cause floating-point math
 362 #         instructions to be emulated by the kernel on machines that lack a
 363 #         floating-point math coprocessor.  Thrill-seekers and chronically
 364 #         sleep-deprived psychotic hacker types can say Y now, everyone else
 365 #         should probably wait a while.
 366
 367 menu "Power management options"
 368 source kernel/power/Kconfig
 369 endmenu
 370
 371 endmenu
 372
 373
 374 menu "Executable formats"
 375
 376 source "fs/Kconfig.binfmt"
 377
 378 endmenu
 379
 380 source "net/Kconfig"
 381
 382 source "drivers/Kconfig"
 383
 384 source "fs/Kconfig"
 385
 386 source "arch/frv/Kconfig.debug"
 387
 388 source "security/Kconfig"
 389
 390 source "crypto/Kconfig"
 391
 392 source "lib/Kconfig"