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