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