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 source "mm/Kconfig"
 106
 107 choice
 108         prompt "uClinux kernel load address"
 109         depends on !MMU
 110         default UCPAGE_OFFSET_C0000000
 111         help
 112           This option sets the base address for the uClinux kernel. The kernel
 113           will rearrange the SDRAM layout to start at this address, and move
 114           itself to start there. It must be greater than 0, and it must be
 115           sufficiently less than 0xE0000000 that the SDRAM does not intersect
 116           the I/O region.
 117
 118           The base address must also be aligned such that the SDRAM controller
 119           can decode it. For instance, a 512MB SDRAM bank must be 512MB aligned.
 120
 121 config UCPAGE_OFFSET_20000000
 122        bool "0x20000000"
 123
 124 config UCPAGE_OFFSET_40000000
 125        bool "0x40000000"
 126
 127 config UCPAGE_OFFSET_60000000
 128        bool "0x60000000"
 129
 130 config UCPAGE_OFFSET_80000000
 131        bool "0x80000000"
 132
 133 config UCPAGE_OFFSET_A0000000
 134        bool "0xA0000000"
 135
 136 config UCPAGE_OFFSET_C0000000
 137        bool "0xC0000000 (Recommended)"
 138
 139 endchoice
 140
 141 config PROTECT_KERNEL
 142         bool "Protect core kernel against userspace"
 143         depends on !MMU
 144         default y
 145         help
 146           Selecting this option causes the uClinux kernel to change the
 147           permittivity of DAMPR register covering the core kernel image to
 148           prevent userspace accessing the underlying memory directly.
 149
 150 choice
 151         prompt "CPU Caching mode"
 152         default FRV_DEFL_CACHE_WBACK
 153         help
 154           This option determines the default caching mode for the kernel.
 155
 156           Write-Back caching mode involves the all reads and writes causing
 157           the affected cacheline to be read into the cache first before being
 158           operated upon. Memory is not then updated by a write until the cache
 159           is filled and a cacheline needs to be displaced from the cache to
 160           make room. Only at that point is it written back.
 161
 162           Write-Behind caching is similar to Write-Back caching, except that a
 163           write won't fetch a cacheline into the cache if there isn't already
 164           one there; it will write directly to memory instead.
 165
 166           Write-Through caching only fetches cachelines from memory on a
 167           read. Writes always get written directly to memory. If the affected
 168           cacheline is also in cache, it will be updated too.
 169
 170           The final option is to turn of caching entirely.
 171
 172           Note that not all CPUs support Write-Behind caching. If the CPU on
 173           which the kernel is running doesn't, it'll fall back to Write-Back
 174           caching.
 175
 176 config FRV_DEFL_CACHE_WBACK
 177         bool "Write-Back"
 178
 179 config FRV_DEFL_CACHE_WBEHIND
 180         bool "Write-Behind"
 181
 182 config FRV_DEFL_CACHE_WTHRU
 183         bool "Write-Through"
 184
 185 config FRV_DEFL_CACHE_DISABLED
 186         bool "Disabled"
 187
 188 endchoice
 189
 190 menu "CPU core support"
 191
 192 config CPU_FR401
 193         bool "Include FR401 core support"
 194         depends on !MMU
 195         default y
 196         help
 197           This enables support for the FR401, FR401A and FR403 CPUs
 198
 199 config CPU_FR405
 200         bool "Include FR405 core support"
 201         depends on !MMU
 202         default y
 203         help
 204           This enables support for the FR405 CPU
 205
 206 config CPU_FR451
 207         bool "Include FR451 core support"
 208         default y
 209         help
 210           This enables support for the FR451 CPU
 211
 212 config CPU_FR451_COMPILE
 213         bool "Specifically compile for FR451 core"
 214         depends on CPU_FR451 && !CPU_FR401 && !CPU_FR405 && !CPU_FR551
 215         default y
 216         help
 217           This causes appropriate flags to be passed to the compiler to
 218           optimise for the FR451 CPU
 219
 220 config CPU_FR551
 221         bool "Include FR551 core support"
 222         depends on !MMU
 223         default y
 224         help
 225           This enables support for the FR555 CPU
 226
 227 config CPU_FR551_COMPILE
 228         bool "Specifically compile for FR551 core"
 229         depends on CPU_FR551 && !CPU_FR401 && !CPU_FR405 && !CPU_FR451
 230         default y
 231         help
 232           This causes appropriate flags to be passed to the compiler to
 233           optimise for the FR555 CPU
 234
 235 config FRV_L1_CACHE_SHIFT
 236         int
 237         default "5" if CPU_FR401 || CPU_FR405 || CPU_FR451
 238         default "6" if CPU_FR551
 239
 240 endmenu
 241
 242 choice
 243         prompt "System support"
 244         default MB93091_VDK
 245
 246 config MB93091_VDK
 247         bool "MB93091 CPU board with or without motherboard"
 248
 249 config MB93093_PDK
 250         bool "MB93093 PDK unit"
 251
 252 endchoice
 253
 254 if MB93091_VDK
 255 choice
 256         prompt "Motherboard support"
 257         default MB93090_MB00
 258
 259 config MB93090_MB00
 260         bool "Use the MB93090-MB00 motherboard"
 261         help
 262           Select this option if the MB93091 CPU board is going to be used with
 263           a MB93090-MB00 VDK motherboard
 264
 265 config MB93091_NO_MB
 266         bool "Use standalone"
 267         help
 268           Select this option if the MB93091 CPU board is going to be used
 269           without a motherboard
 270
 271 endchoice
 272 endif
 273
 274 config FUJITSU_MB93493
 275         bool "MB93493 Multimedia chip"
 276         help
 277           Select this option if the MB93493 multimedia chip is going to be
 278           used.
 279
 280 choice
 281         prompt "GP-Relative data support"
 282         default GPREL_DATA_8
 283         help
 284           This option controls what data, if any, should be placed in the GP
 285           relative data sections. Using this means that the compiler can
 286           generate accesses to the data using GR16-relative addressing which
 287           is faster than absolute instructions and saves space (2 instructions
 288           per access).
 289
 290           However, the GPREL region is limited in size because the immediate
 291           value used in the load and store instructions is limited to a 12-bit
 292           signed number.
 293
 294           So if the linker starts complaining that accesses to GPREL data are
 295           out of range, try changing this option from the default.
 296
 297           Note that modules will always be compiled with this feature disabled
 298           as the module data will not be in range of the GP base address.
 299
 300 config GPREL_DATA_8
 301         bool "Put data objects of up to 8 bytes into GP-REL"
 302
 303 config GPREL_DATA_4
 304         bool "Put data objects of up to 4 bytes into GP-REL"
 305
 306 config GPREL_DATA_NONE
 307         bool "Don't use GP-REL"
 308
 309 endchoice
 310
 311 config FRV_ONCPU_SERIAL
 312         bool "Use on-CPU serial ports"
 313         select SERIAL_8250
 314         default y
 315
 316 config PCI
 317         bool "Use PCI"
 318         depends on MB93090_MB00
 319         default y
 320         help
 321           Some FR-V systems (such as the MB93090-MB00 VDK) have PCI
 322           onboard. If you have one of these boards and you wish to use the PCI
 323           facilities, say Y here.
 324
 325           The PCI-HOWTO, available from
 326           <http://www.tldp.org/docs.html#howto>, contains valuable
 327           information about which PCI hardware does work under Linux and which
 328           doesn't.
 329
 330 config RESERVE_DMA_COHERENT
 331         bool "Reserve DMA coherent memory"
 332         depends on PCI && !MMU
 333         default y
 334         help
 335           Many PCI drivers require access to uncached memory for DMA device
 336           communications (such as is done with some Ethernet buffer rings). If
 337           a fully featured MMU is available, this can be done through page
 338           table settings, but if not, a region has to be set aside and marked
 339           with a special DAMPR register.
 340
 341           Setting this option causes uClinux to set aside a portion of the
 342           available memory for use in this manner. The memory will then be
 343           unavailable for normal kernel use.
 344
 345 source "drivers/pci/Kconfig"
 346
 347 source "drivers/pcmcia/Kconfig"
 348
 349 #config MATH_EMULATION
 350 #       bool "Math emulation support (EXPERIMENTAL)"
 351 #       depends on EXPERIMENTAL
 352 #       help
 353 #         At some point in the future, this will cause floating-point math
 354 #         instructions to be emulated by the kernel on machines that lack a
 355 #         floating-point math coprocessor.  Thrill-seekers and chronically
 356 #         sleep-deprived psychotic hacker types can say Y now, everyone else
 357 #         should probably wait a while.
 358
 359 menu "Power management options"
 360
 361 config ARCH_SUSPEND_POSSIBLE
 362         def_bool y
 363         depends on !SMP
 364
 365 source kernel/power/Kconfig
 366 endmenu
 367
 368 endmenu
 369
 370
 371 menu "Executable formats"
 372
 373 source "fs/Kconfig.binfmt"
 374
 375 endmenu
 376
 377 source "net/Kconfig"
 378
 379 source "drivers/Kconfig"
 380
 381 source "fs/Kconfig"
 382
 383 source "kernel/Kconfig.instrumentation"
 384
 385 source "arch/frv/Kconfig.debug"
 386
 387 source "security/Kconfig"
 388
 389 source "crypto/Kconfig"
 390
 391 source "lib/Kconfig"