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         select HAVE_IDE
   9         select HAVE_ARCH_TRACEHOOK
  10         select HAVE_PERF_EVENTS
  11
  12 config ZONE_DMA
  13         bool
  14         default y
  15
  16 config RWSEM_GENERIC_SPINLOCK
  17         bool
  18         default y
  19
  20 config RWSEM_XCHGADD_ALGORITHM
  21         bool
  22
  23 config GENERIC_FIND_NEXT_BIT
  24         bool
  25         default y
  26
  27 config GENERIC_HWEIGHT
  28         bool
  29         default y
  30
  31 config GENERIC_CALIBRATE_DELAY
  32         bool
  33         default n
  34
  35 config GENERIC_HARDIRQS
  36         bool
  37         default y
  38
  39 config GENERIC_HARDIRQS_NO__DO_IRQ
  40         bool
  41         default y
  42
  43 config GENERIC_TIME
  44         bool
  45         default y
  46
  47 config TIME_LOW_RES
  48         bool
  49         default y
  50
  51 config QUICKLIST
  52         bool
  53         default y
  54
  55 config ARCH_HAS_ILOG2_U32
  56         bool
  57         default y
  58
  59 config ARCH_HAS_ILOG2_U64
  60         bool
  61         default y
  62
  63 config HZ
  64         int
  65         default 1000
  66
  67 mainmenu "Fujitsu FR-V Kernel Configuration"
  68
  69 source "init/Kconfig"
  70
  71 source "kernel/Kconfig.freezer"
  72
  73
  74 menu "Fujitsu FR-V system setup"
  75
  76 config MMU
  77         bool "MMU support"
  78         help
  79           This options switches on and off support for the FR-V MMU
  80           (effectively switching between vmlinux and uClinux). Not all FR-V
  81           CPUs support this. Currently only the FR451 has a sufficiently
  82           featured MMU.
  83
  84 config FRV_OUTOFLINE_ATOMIC_OPS
  85         bool "Out-of-line the FRV atomic operations"
  86         default n
  87         help
  88           Setting this option causes the FR-V atomic operations to be mostly
  89           implemented out-of-line.
  90
  91           See Documentation/frv/atomic-ops.txt for more information.
  92
  93 config HIGHMEM
  94         bool "High memory support"
  95         depends on MMU
  96         default y
  97         help
  98           If you wish to use more than 256MB of memory with your MMU based
  99           system, you will need to select this option. The kernel can only see
 100           the memory between 0xC0000000 and 0xD0000000 directly... everything
 101           else must be kmapped.
 102
 103           The arch is, however, capable of supporting up to 3GB of SDRAM.
 104
 105 config HIGHPTE
 106         bool "Allocate page tables in highmem"
 107         depends on HIGHMEM
 108         default y
 109         help
 110           The VM uses one page of memory for each page table.  For systems
 111           with a lot of RAM, this can be wasteful of precious low memory.
 112           Setting this option will put user-space page tables in high memory.
 113
 114 source "mm/Kconfig"
 115
 116 choice
 117         prompt "uClinux kernel load address"
 118         depends on !MMU
 119         default UCPAGE_OFFSET_C0000000
 120         help
 121           This option sets the base address for the uClinux kernel. The kernel
 122           will rearrange the SDRAM layout to start at this address, and move
 123           itself to start there. It must be greater than 0, and it must be
 124           sufficiently less than 0xE0000000 that the SDRAM does not intersect
 125           the I/O region.
 126
 127           The base address must also be aligned such that the SDRAM controller
 128           can decode it. For instance, a 512MB SDRAM bank must be 512MB aligned.
 129
 130 config UCPAGE_OFFSET_20000000
 131        bool "0x20000000"
 132
 133 config UCPAGE_OFFSET_40000000
 134        bool "0x40000000"
 135
 136 config UCPAGE_OFFSET_60000000
 137        bool "0x60000000"
 138
 139 config UCPAGE_OFFSET_80000000
 140        bool "0x80000000"
 141
 142 config UCPAGE_OFFSET_A0000000
 143        bool "0xA0000000"
 144
 145 config UCPAGE_OFFSET_C0000000
 146        bool "0xC0000000 (Recommended)"
 147
 148 endchoice
 149
 150 config PAGE_OFFSET
 151         hex
 152         default 0x20000000 if UCPAGE_OFFSET_20000000
 153         default 0x40000000 if UCPAGE_OFFSET_40000000
 154         default 0x60000000 if UCPAGE_OFFSET_60000000
 155         default 0x80000000 if UCPAGE_OFFSET_80000000
 156         default 0xA0000000 if UCPAGE_OFFSET_A0000000
 157         default 0xC0000000
 158
 159 config PROTECT_KERNEL
 160         bool "Protect core kernel against userspace"
 161         depends on !MMU
 162         default y
 163         help
 164           Selecting this option causes the uClinux kernel to change the
 165           permittivity of DAMPR register covering the core kernel image to
 166           prevent userspace accessing the underlying memory directly.
 167
 168 choice
 169         prompt "CPU Caching mode"
 170         default FRV_DEFL_CACHE_WBACK
 171         help
 172           This option determines the default caching mode for the kernel.
 173
 174           Write-Back caching mode involves the all reads and writes causing
 175           the affected cacheline to be read into the cache first before being
 176           operated upon. Memory is not then updated by a write until the cache
 177           is filled and a cacheline needs to be displaced from the cache to
 178           make room. Only at that point is it written back.
 179
 180           Write-Behind caching is similar to Write-Back caching, except that a
 181           write won't fetch a cacheline into the cache if there isn't already
 182           one there; it will write directly to memory instead.
 183
 184           Write-Through caching only fetches cachelines from memory on a
 185           read. Writes always get written directly to memory. If the affected
 186           cacheline is also in cache, it will be updated too.
 187
 188           The final option is to turn of caching entirely.
 189
 190           Note that not all CPUs support Write-Behind caching. If the CPU on
 191           which the kernel is running doesn't, it'll fall back to Write-Back
 192           caching.
 193
 194 config FRV_DEFL_CACHE_WBACK
 195         bool "Write-Back"
 196
 197 config FRV_DEFL_CACHE_WBEHIND
 198         bool "Write-Behind"
 199
 200 config FRV_DEFL_CACHE_WTHRU
 201         bool "Write-Through"
 202
 203 config FRV_DEFL_CACHE_DISABLED
 204         bool "Disabled"
 205
 206 endchoice
 207
 208 menu "CPU core support"
 209
 210 config CPU_FR401
 211         bool "Include FR401 core support"
 212         depends on !MMU
 213         default y
 214         help
 215           This enables support for the FR401, FR401A and FR403 CPUs
 216
 217 config CPU_FR405
 218         bool "Include FR405 core support"
 219         depends on !MMU
 220         default y
 221         help
 222           This enables support for the FR405 CPU
 223
 224 config CPU_FR451
 225         bool "Include FR451 core support"
 226         default y
 227         help
 228           This enables support for the FR451 CPU
 229
 230 config CPU_FR451_COMPILE
 231         bool "Specifically compile for FR451 core"
 232         depends on CPU_FR451 && !CPU_FR401 && !CPU_FR405 && !CPU_FR551
 233         default y
 234         help
 235           This causes appropriate flags to be passed to the compiler to
 236           optimise for the FR451 CPU
 237
 238 config CPU_FR551
 239         bool "Include FR551 core support"
 240         depends on !MMU
 241         default y
 242         help
 243           This enables support for the FR555 CPU
 244
 245 config CPU_FR551_COMPILE
 246         bool "Specifically compile for FR551 core"
 247         depends on CPU_FR551 && !CPU_FR401 && !CPU_FR405 && !CPU_FR451
 248         default y
 249         help
 250           This causes appropriate flags to be passed to the compiler to
 251           optimise for the FR555 CPU
 252
 253 config FRV_L1_CACHE_SHIFT
 254         int
 255         default "5" if CPU_FR401 || CPU_FR405 || CPU_FR451
 256         default "6" if CPU_FR551
 257
 258 endmenu
 259
 260 choice
 261         prompt "System support"
 262         default MB93091_VDK
 263
 264 config MB93091_VDK
 265         bool "MB93091 CPU board with or without motherboard"
 266
 267 config MB93093_PDK
 268         bool "MB93093 PDK unit"
 269
 270 endchoice
 271
 272 if MB93091_VDK
 273 choice
 274         prompt "Motherboard support"
 275         default MB93090_MB00
 276
 277 config MB93090_MB00
 278         bool "Use the MB93090-MB00 motherboard"
 279         help
 280           Select this option if the MB93091 CPU board is going to be used with
 281           a MB93090-MB00 VDK motherboard
 282
 283 config MB93091_NO_MB
 284         bool "Use standalone"
 285         help
 286           Select this option if the MB93091 CPU board is going to be used
 287           without a motherboard
 288
 289 endchoice
 290 endif
 291
 292 config FUJITSU_MB93493
 293         bool "MB93493 Multimedia chip"
 294         help
 295           Select this option if the MB93493 multimedia chip is going to be
 296           used.
 297
 298 choice
 299         prompt "GP-Relative data support"
 300         default GPREL_DATA_8
 301         help
 302           This option controls what data, if any, should be placed in the GP
 303           relative data sections. Using this means that the compiler can
 304           generate accesses to the data using GR16-relative addressing which
 305           is faster than absolute instructions and saves space (2 instructions
 306           per access).
 307
 308           However, the GPREL region is limited in size because the immediate
 309           value used in the load and store instructions is limited to a 12-bit
 310           signed number.
 311
 312           So if the linker starts complaining that accesses to GPREL data are
 313           out of range, try changing this option from the default.
 314
 315           Note that modules will always be compiled with this feature disabled
 316           as the module data will not be in range of the GP base address.
 317
 318 config GPREL_DATA_8
 319         bool "Put data objects of up to 8 bytes into GP-REL"
 320
 321 config GPREL_DATA_4
 322         bool "Put data objects of up to 4 bytes into GP-REL"
 323
 324 config GPREL_DATA_NONE
 325         bool "Don't use GP-REL"
 326
 327 endchoice
 328
 329 config FRV_ONCPU_SERIAL
 330         bool "Use on-CPU serial ports"
 331         select SERIAL_8250
 332         default y
 333
 334 config PCI
 335         bool "Use PCI"
 336         depends on MB93090_MB00
 337         default y
 338         help
 339           Some FR-V systems (such as the MB93090-MB00 VDK) have PCI
 340           onboard. If you have one of these boards and you wish to use the PCI
 341           facilities, say Y here.
 342
 343 config RESERVE_DMA_COHERENT
 344         bool "Reserve DMA coherent memory"
 345         depends on PCI && !MMU
 346         default y
 347         help
 348           Many PCI drivers require access to uncached memory for DMA device
 349           communications (such as is done with some Ethernet buffer rings). If
 350           a fully featured MMU is available, this can be done through page
 351           table settings, but if not, a region has to be set aside and marked
 352           with a special DAMPR register.
 353
 354           Setting this option causes uClinux to set aside a portion of the
 355           available memory for use in this manner. The memory will then be
 356           unavailable for normal kernel use.
 357
 358 source "drivers/pci/Kconfig"
 359
 360 source "drivers/pcmcia/Kconfig"
 361
 362 #config MATH_EMULATION
 363 #       bool "Math emulation support (EXPERIMENTAL)"
 364 #       depends on EXPERIMENTAL
 365 #       help
 366 #         At some point in the future, this will cause floating-point math
 367 #         instructions to be emulated by the kernel on machines that lack a
 368 #         floating-point math coprocessor.  Thrill-seekers and chronically
 369 #         sleep-deprived psychotic hacker types can say Y now, everyone else
 370 #         should probably wait a while.
 371
 372 menu "Power management options"
 373
 374 config ARCH_SUSPEND_POSSIBLE
 375         def_bool y
 376         depends on !SMP
 377
 378 source kernel/power/Kconfig
 379 endmenu
 380
 381 endmenu
 382
 383
 384 menu "Executable formats"
 385
 386 source "fs/Kconfig.binfmt"
 387
 388 endmenu
 389
 390 source "net/Kconfig"
 391
 392 source "drivers/Kconfig"
 393
 394 source "fs/Kconfig"
 395
 396 source "arch/frv/Kconfig.debug"
 397
 398 source "security/Kconfig"
 399
 400 source "crypto/Kconfig"
 401
 402 source "lib/Kconfig"