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/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 PAGE_OFFSET
 142         hex
 143         default 0x20000000 if UCPAGE_OFFSET_20000000
 144         default 0x40000000 if UCPAGE_OFFSET_40000000
 145         default 0x60000000 if UCPAGE_OFFSET_60000000
 146         default 0x80000000 if UCPAGE_OFFSET_80000000
 147         default 0xA0000000 if UCPAGE_OFFSET_A0000000
 148         default 0xC0000000
 149
 150 config PROTECT_KERNEL
 151         bool "Protect core kernel against userspace"
 152         depends on !MMU
 153         default y
 154         help
 155           Selecting this option causes the uClinux kernel to change the
 156           permittivity of DAMPR register covering the core kernel image to
 157           prevent userspace accessing the underlying memory directly.
 158
 159 choice
 160         prompt "CPU Caching mode"
 161         default FRV_DEFL_CACHE_WBACK
 162         help
 163           This option determines the default caching mode for the kernel.
 164
 165           Write-Back caching mode involves the all reads and writes causing
 166           the affected cacheline to be read into the cache first before being
 167           operated upon. Memory is not then updated by a write until the cache
 168           is filled and a cacheline needs to be displaced from the cache to
 169           make room. Only at that point is it written back.
 170
 171           Write-Behind caching is similar to Write-Back caching, except that a
 172           write won't fetch a cacheline into the cache if there isn't already
 173           one there; it will write directly to memory instead.
 174
 175           Write-Through caching only fetches cachelines from memory on a
 176           read. Writes always get written directly to memory. If the affected
 177           cacheline is also in cache, it will be updated too.
 178
 179           The final option is to turn of caching entirely.
 180
 181           Note that not all CPUs support Write-Behind caching. If the CPU on
 182           which the kernel is running doesn't, it'll fall back to Write-Back
 183           caching.
 184
 185 config FRV_DEFL_CACHE_WBACK
 186         bool "Write-Back"
 187
 188 config FRV_DEFL_CACHE_WBEHIND
 189         bool "Write-Behind"
 190
 191 config FRV_DEFL_CACHE_WTHRU
 192         bool "Write-Through"
 193
 194 config FRV_DEFL_CACHE_DISABLED
 195         bool "Disabled"
 196
 197 endchoice
 198
 199 menu "CPU core support"
 200
 201 config CPU_FR401
 202         bool "Include FR401 core support"
 203         depends on !MMU
 204         default y
 205         help
 206           This enables support for the FR401, FR401A and FR403 CPUs
 207
 208 config CPU_FR405
 209         bool "Include FR405 core support"
 210         depends on !MMU
 211         default y
 212         help
 213           This enables support for the FR405 CPU
 214
 215 config CPU_FR451
 216         bool "Include FR451 core support"
 217         default y
 218         help
 219           This enables support for the FR451 CPU
 220
 221 config CPU_FR451_COMPILE
 222         bool "Specifically compile for FR451 core"
 223         depends on CPU_FR451 && !CPU_FR401 && !CPU_FR405 && !CPU_FR551
 224         default y
 225         help
 226           This causes appropriate flags to be passed to the compiler to
 227           optimise for the FR451 CPU
 228
 229 config CPU_FR551
 230         bool "Include FR551 core support"
 231         depends on !MMU
 232         default y
 233         help
 234           This enables support for the FR555 CPU
 235
 236 config CPU_FR551_COMPILE
 237         bool "Specifically compile for FR551 core"
 238         depends on CPU_FR551 && !CPU_FR401 && !CPU_FR405 && !CPU_FR451
 239         default y
 240         help
 241           This causes appropriate flags to be passed to the compiler to
 242           optimise for the FR555 CPU
 243
 244 config FRV_L1_CACHE_SHIFT
 245         int
 246         default "5" if CPU_FR401 || CPU_FR405 || CPU_FR451
 247         default "6" if CPU_FR551
 248
 249 endmenu
 250
 251 choice
 252         prompt "System support"
 253         default MB93091_VDK
 254
 255 config MB93091_VDK
 256         bool "MB93091 CPU board with or without motherboard"
 257
 258 config MB93093_PDK
 259         bool "MB93093 PDK unit"
 260
 261 endchoice
 262
 263 if MB93091_VDK
 264 choice
 265         prompt "Motherboard support"
 266         default MB93090_MB00
 267
 268 config MB93090_MB00
 269         bool "Use the MB93090-MB00 motherboard"
 270         help
 271           Select this option if the MB93091 CPU board is going to be used with
 272           a MB93090-MB00 VDK motherboard
 273
 274 config MB93091_NO_MB
 275         bool "Use standalone"
 276         help
 277           Select this option if the MB93091 CPU board is going to be used
 278           without a motherboard
 279
 280 endchoice
 281 endif
 282
 283 config FUJITSU_MB93493
 284         bool "MB93493 Multimedia chip"
 285         help
 286           Select this option if the MB93493 multimedia chip is going to be
 287           used.
 288
 289 choice
 290         prompt "GP-Relative data support"
 291         default GPREL_DATA_8
 292         help
 293           This option controls what data, if any, should be placed in the GP
 294           relative data sections. Using this means that the compiler can
 295           generate accesses to the data using GR16-relative addressing which
 296           is faster than absolute instructions and saves space (2 instructions
 297           per access).
 298
 299           However, the GPREL region is limited in size because the immediate
 300           value used in the load and store instructions is limited to a 12-bit
 301           signed number.
 302
 303           So if the linker starts complaining that accesses to GPREL data are
 304           out of range, try changing this option from the default.
 305
 306           Note that modules will always be compiled with this feature disabled
 307           as the module data will not be in range of the GP base address.
 308
 309 config GPREL_DATA_8
 310         bool "Put data objects of up to 8 bytes into GP-REL"
 311
 312 config GPREL_DATA_4
 313         bool "Put data objects of up to 4 bytes into GP-REL"
 314
 315 config GPREL_DATA_NONE
 316         bool "Don't use GP-REL"
 317
 318 endchoice
 319
 320 config FRV_ONCPU_SERIAL
 321         bool "Use on-CPU serial ports"
 322         select SERIAL_8250
 323         default y
 324
 325 config PCI
 326         bool "Use PCI"
 327         depends on MB93090_MB00
 328         default y
 329         help
 330           Some FR-V systems (such as the MB93090-MB00 VDK) have PCI
 331           onboard. If you have one of these boards and you wish to use the PCI
 332           facilities, say Y here.
 333
 334 config RESERVE_DMA_COHERENT
 335         bool "Reserve DMA coherent memory"
 336         depends on PCI && !MMU
 337         default y
 338         help
 339           Many PCI drivers require access to uncached memory for DMA device
 340           communications (such as is done with some Ethernet buffer rings). If
 341           a fully featured MMU is available, this can be done through page
 342           table settings, but if not, a region has to be set aside and marked
 343           with a special DAMPR register.
 344
 345           Setting this option causes uClinux to set aside a portion of the
 346           available memory for use in this manner. The memory will then be
 347           unavailable for normal kernel use.
 348
 349 source "drivers/pci/Kconfig"
 350
 351 source "drivers/pcmcia/Kconfig"
 352
 353 #config MATH_EMULATION
 354 #       bool "Math emulation support (EXPERIMENTAL)"
 355 #       depends on EXPERIMENTAL
 356 #       help
 357 #         At some point in the future, this will cause floating-point math
 358 #         instructions to be emulated by the kernel on machines that lack a
 359 #         floating-point math coprocessor.  Thrill-seekers and chronically
 360 #         sleep-deprived psychotic hacker types can say Y now, everyone else
 361 #         should probably wait a while.
 362
 363 menu "Power management options"
 364
 365 config ARCH_SUSPEND_POSSIBLE
 366         def_bool y
 367         depends on !SMP
 368
 369 source kernel/power/Kconfig
 370 endmenu
 371
 372 endmenu
 373
 374
 375 menu "Executable formats"
 376
 377 source "fs/Kconfig.binfmt"
 378
 379 endmenu
 380
 381 source "net/Kconfig"
 382
 383 source "drivers/Kconfig"
 384
 385 source "fs/Kconfig"
 386
 387 source "arch/frv/Kconfig.debug"
 388
 389 source "security/Kconfig"
 390
 391 source "crypto/Kconfig"
 392
 393 source "lib/Kconfig"