arch/sparc/Kconfig

   1 # For a description of the syntax of this configuration file,
   2 # see Documentation/kbuild/kconfig-language.txt.
   3 #
   4
   5 mainmenu "Linux/SPARC Kernel Configuration"
   6
   7 config 64BIT
   8         bool "64-bit kernel" if ARCH = "sparc"
   9         default ARCH = "sparc64"
  10         help
  11           SPARC is a family of RISC microprocessors designed and marketed by
  12           Sun Microsystems, incorporated.  They are very widely found in Sun
  13           workstations and clones.
  14
  15           Say yes to build a 64-bit kernel - formerly known as sparc64
  16           Say no to build a 32-bit kernel - formerly known as sparc
  17
  18 config SPARC
  19         bool
  20         default y
  21         select OF
  22         select OF_PROMTREE
  23         select HAVE_IDE
  24         select HAVE_OPROFILE
  25         select HAVE_ARCH_KGDB if !SMP || SPARC64
  26         select HAVE_ARCH_TRACEHOOK
  27         select ARCH_WANT_OPTIONAL_GPIOLIB
  28         select RTC_CLASS
  29         select RTC_DRV_M48T59
  30         select HAVE_IRQ_WORK
  31         select HAVE_PERF_EVENTS
  32         select PERF_USE_VMALLOC
  33         select HAVE_DMA_ATTRS
  34         select HAVE_DMA_API_DEBUG
  35         select HAVE_ARCH_JUMP_LABEL
  36
  37 config SPARC32
  38         def_bool !64BIT
  39
  40 config SPARC64
  41         def_bool 64BIT
  42         select ARCH_SUPPORTS_MSI
  43         select HAVE_FUNCTION_TRACER
  44         select HAVE_FUNCTION_GRAPH_TRACER
  45         select HAVE_FUNCTION_GRAPH_FP_TEST
  46         select HAVE_FUNCTION_TRACE_MCOUNT_TEST
  47         select HAVE_KRETPROBES
  48         select HAVE_KPROBES
  49         select HAVE_MEMBLOCK
  50         select HAVE_SYSCALL_WRAPPERS
  51         select HAVE_DYNAMIC_FTRACE
  52         select HAVE_FTRACE_MCOUNT_RECORD
  53         select HAVE_SYSCALL_TRACEPOINTS
  54         select USE_GENERIC_SMP_HELPERS if SMP
  55         select RTC_DRV_CMOS
  56         select RTC_DRV_BQ4802
  57         select RTC_DRV_SUN4V
  58         select RTC_DRV_STARFIRE
  59         select HAVE_IRQ_WORK
  60         select HAVE_PERF_EVENTS
  61         select PERF_USE_VMALLOC
  62
  63 config ARCH_DEFCONFIG
  64         string
  65         default "arch/sparc/configs/sparc32_defconfig" if SPARC32
  66         default "arch/sparc/configs/sparc64_defconfig" if SPARC64
  67
  68 # CONFIG_BITS can be used at source level to get 32/64 bits
  69 config BITS
  70         int
  71         default 32 if SPARC32
  72         default 64 if SPARC64
  73
  74 config ARCH_USES_GETTIMEOFFSET
  75         bool
  76         default y if SPARC32
  77
  78 config GENERIC_CMOS_UPDATE
  79         bool
  80         default y
  81
  82 config GENERIC_CLOCKEVENTS
  83         bool
  84         default y if SPARC64
  85
  86 config IOMMU_HELPER
  87         bool
  88         default y if SPARC64
  89
  90 config QUICKLIST
  91         bool
  92         default y if SPARC64
  93
  94 config STACKTRACE_SUPPORT
  95         bool
  96         default y if SPARC64
  97
  98 config LOCKDEP_SUPPORT
  99         bool
 100         default y if SPARC64
 101
 102 config HAVE_LATENCYTOP_SUPPORT
 103         bool
 104         default y if SPARC64
 105
 106 config AUDIT_ARCH
 107         bool
 108         default y
 109
 110 config HAVE_SETUP_PER_CPU_AREA
 111         def_bool y if SPARC64
 112
 113 config NEED_PER_CPU_EMBED_FIRST_CHUNK
 114         def_bool y if SPARC64
 115
 116 config NEED_PER_CPU_PAGE_FIRST_CHUNK
 117         def_bool y if SPARC64
 118
 119 config GENERIC_HARDIRQS_NO__DO_IRQ
 120         bool
 121         def_bool y if SPARC64
 122
 123 config MMU
 124         bool
 125         default y
 126
 127 config HIGHMEM
 128         bool
 129         default y if SPARC32
 130
 131 config ZONE_DMA
 132         bool
 133         default y if SPARC32
 134
 135 config NEED_DMA_MAP_STATE
 136         def_bool y
 137
 138 config NEED_SG_DMA_LENGTH
 139         def_bool y
 140
 141 config GENERIC_ISA_DMA
 142         bool
 143         default y if SPARC32
 144
 145 config GENERIC_GPIO
 146         bool
 147         help
 148           Generic GPIO API support
 149
 150 config ARCH_NO_VIRT_TO_BUS
 151         def_bool y
 152
 153 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
 154         def_bool y if SPARC64
 155
 156 source "init/Kconfig"
 157
 158 source "kernel/Kconfig.freezer"
 159
 160 menu "Processor type and features"
 161
 162 config SMP
 163         bool "Symmetric multi-processing support (does not work on sun4/sun4c)"
 164         ---help---
 165           This enables support for systems with more than one CPU. If you have
 166           a system with only one CPU, say N. If you have a system with more
 167           than one CPU, say Y.
 168
 169           If you say N here, the kernel will run on single and multiprocessor
 170           machines, but will use only one CPU of a multiprocessor machine. If
 171           you say Y here, the kernel will run on many, but not all,
 172           singleprocessor machines. On a singleprocessor machine, the kernel
 173           will run faster if you say N here.
 174
 175           People using multiprocessor machines who say Y here should also say
 176           Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
 177           Management" code will be disabled if you say Y here.
 178
 179           See also <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO
 180           available at <http://www.tldp.org/docs.html#howto>.
 181
 182           If you don't know what to do here, say N.
 183
 184 config NR_CPUS
 185         int "Maximum number of CPUs"
 186         depends on SMP
 187         range 2 32 if SPARC32
 188         range 2 1024 if SPARC64
 189         default 32 if SPARC32
 190         default 64 if SPARC64
 191
 192 source kernel/Kconfig.hz
 193
 194 config RWSEM_GENERIC_SPINLOCK
 195         bool
 196         default y if SPARC32
 197
 198 config RWSEM_XCHGADD_ALGORITHM
 199         bool
 200         default y if SPARC64
 201
 202 config GENERIC_FIND_NEXT_BIT
 203         bool
 204         default y
 205
 206 config GENERIC_HWEIGHT
 207         bool
 208         default y if !ULTRA_HAS_POPULATION_COUNT
 209
 210 config GENERIC_CALIBRATE_DELAY
 211         bool
 212         default y
 213
 214 config ARCH_MAY_HAVE_PC_FDC
 215         bool
 216         default y
 217
 218 config EMULATED_CMPXCHG
 219         bool
 220         default y if SPARC32
 221         help
 222           Sparc32 does not have a CAS instruction like sparc64. cmpxchg()
 223           is emulated, and therefore it is not completely atomic.
 224
 225 # Makefile helpers
 226 config SPARC32_SMP
 227         bool
 228         default y
 229         depends on SPARC32 && SMP
 230
 231 config SPARC64_SMP
 232         bool
 233         default y
 234         depends on SPARC64 && SMP
 235
 236 config EARLYFB
 237         bool "Support for early boot text console"
 238         default y
 239         depends on SPARC64
 240         help
 241           Say Y here to enable a faster early framebuffer boot console.
 242
 243 choice
 244         prompt "Kernel page size" if SPARC64
 245         default SPARC64_PAGE_SIZE_8KB
 246
 247 config SPARC64_PAGE_SIZE_8KB
 248         bool "8KB"
 249         help
 250           This lets you select the page size of the kernel.
 251
 252           8KB and 64KB work quite well, since SPARC ELF sections
 253           provide for up to 64KB alignment.
 254
 255           If you don't know what to do, choose 8KB.
 256
 257 config SPARC64_PAGE_SIZE_64KB
 258         bool "64KB"
 259
 260 endchoice
 261
 262 config SECCOMP
 263         bool "Enable seccomp to safely compute untrusted bytecode"
 264         depends on SPARC64 && PROC_FS
 265         default y
 266         help
 267           This kernel feature is useful for number crunching applications
 268           that may need to compute untrusted bytecode during their
 269           execution. By using pipes or other transports made available to
 270           the process as file descriptors supporting the read/write
 271           syscalls, it's possible to isolate those applications in
 272           their own address space using seccomp. Once seccomp is
 273           enabled via /proc/<pid>/seccomp, it cannot be disabled
 274           and the task is only allowed to execute a few safe syscalls
 275           defined by each seccomp mode.
 276
 277           If unsure, say Y. Only embedded should say N here.
 278
 279 config HOTPLUG_CPU
 280         bool "Support for hot-pluggable CPUs"
 281         depends on SPARC64 && SMP
 282         select HOTPLUG
 283         help
 284           Say Y here to experiment with turning CPUs off and on.  CPUs
 285           can be controlled through /sys/devices/system/cpu/cpu#.
 286           Say N if you want to disable CPU hotplug.
 287
 288 config GENERIC_HARDIRQS
 289         bool
 290         default y if SPARC64
 291
 292 source "kernel/time/Kconfig"
 293
 294 if SPARC64
 295 source "drivers/cpufreq/Kconfig"
 296
 297 config US3_FREQ
 298         tristate "UltraSPARC-III CPU Frequency driver"
 299         depends on CPU_FREQ
 300         select CPU_FREQ_TABLE
 301         help
 302           This adds the CPUFreq driver for UltraSPARC-III processors.
 303
 304           For details, take a look at <file:Documentation/cpu-freq>.
 305
 306           If in doubt, say N.
 307
 308 config US2E_FREQ
 309         tristate "UltraSPARC-IIe CPU Frequency driver"
 310         depends on CPU_FREQ
 311         select CPU_FREQ_TABLE
 312         help
 313           This adds the CPUFreq driver for UltraSPARC-IIe processors.
 314
 315           For details, take a look at <file:Documentation/cpu-freq>.
 316
 317           If in doubt, say N.
 318
 319 endif
 320
 321 config US3_MC
 322         tristate "UltraSPARC-III Memory Controller driver"
 323         depends on SPARC64
 324         default y
 325         help
 326           This adds a driver for the UltraSPARC-III memory controller.
 327           Loading this driver allows exact mnemonic strings to be
 328           printed in the event of a memory error, so that the faulty DIMM
 329           on the motherboard can be matched to the error.
 330
 331           If in doubt, say Y, as this information can be very useful.
 332
 333 # Global things across all Sun machines.
 334 config GENERIC_LOCKBREAK
 335         bool
 336         default y
 337         depends on SPARC64 && SMP && PREEMPT
 338
 339 choice
 340         prompt "SPARC64 Huge TLB Page Size"
 341         depends on SPARC64 && HUGETLB_PAGE
 342         default HUGETLB_PAGE_SIZE_4MB
 343
 344 config HUGETLB_PAGE_SIZE_4MB
 345         bool "4MB"
 346
 347 config HUGETLB_PAGE_SIZE_512K
 348         bool "512K"
 349
 350 config HUGETLB_PAGE_SIZE_64K
 351         depends on !SPARC64_PAGE_SIZE_64KB
 352         bool "64K"
 353
 354 endchoice
 355
 356 config NUMA
 357         bool "NUMA support"
 358         depends on SPARC64 && SMP
 359
 360 config NODES_SHIFT
 361         int
 362         default "4"
 363         depends on NEED_MULTIPLE_NODES
 364
 365 # Some NUMA nodes have memory ranges that span
 366 # other nodes.  Even though a pfn is valid and
 367 # between a node's start and end pfns, it may not
 368 # reside on that node.  See memmap_init_zone()
 369 # for details.
 370 config NODES_SPAN_OTHER_NODES
 371         def_bool y
 372         depends on NEED_MULTIPLE_NODES
 373
 374 config ARCH_POPULATES_NODE_MAP
 375         def_bool y if SPARC64
 376
 377 config ARCH_SELECT_MEMORY_MODEL
 378         def_bool y if SPARC64
 379
 380 config ARCH_SPARSEMEM_ENABLE
 381         def_bool y if SPARC64
 382         select SPARSEMEM_VMEMMAP_ENABLE
 383
 384 config ARCH_SPARSEMEM_DEFAULT
 385         def_bool y if SPARC64
 386
 387 source "mm/Kconfig"
 388
 389 config SCHED_SMT
 390         bool "SMT (Hyperthreading) scheduler support"
 391         depends on SPARC64 && SMP
 392         default y
 393         help
 394           SMT scheduler support improves the CPU scheduler's decision making
 395           when dealing with SPARC cpus at a cost of slightly increased overhead
 396           in some places. If unsure say N here.
 397
 398 config SCHED_MC
 399         bool "Multi-core scheduler support"
 400         depends on SPARC64 && SMP
 401         default y
 402         help
 403           Multi-core scheduler support improves the CPU scheduler's decision
 404           making when dealing with multi-core CPU chips at a cost of slightly
 405           increased overhead in some places. If unsure say N here.
 406
 407 if SPARC64
 408 source "kernel/Kconfig.preempt"
 409 endif
 410
 411 config CMDLINE_BOOL
 412         bool "Default bootloader kernel arguments"
 413         depends on SPARC64
 414
 415 config CMDLINE
 416         string "Initial kernel command string"
 417         depends on CMDLINE_BOOL
 418         default "console=ttyS0,9600 root=/dev/sda1"
 419         help
 420           Say Y here if you want to be able to pass default arguments to
 421           the kernel. This will be overridden by the bootloader, if you
 422           use one (such as SILO). This is most useful if you want to boot
 423           a kernel from TFTP, and want default options to be available
 424           with having them passed on the command line.
 425
 426           NOTE: This option WILL override the PROM bootargs setting!
 427
 428 config SUN_PM
 429         bool
 430         default y if SPARC32
 431         help
 432           Enable power management and CPU standby features on supported
 433           SPARC platforms.
 434
 435 config SPARC_LED
 436         tristate "Sun4m LED driver"
 437         depends on SPARC32
 438         help
 439           This driver toggles the front-panel LED on sun4m systems
 440           in a user-specifiable manner.  Its state can be probed
 441           by reading /proc/led and its blinking mode can be changed
 442           via writes to /proc/led
 443
 444 config SERIAL_CONSOLE
 445         bool
 446         depends on SPARC32
 447         default y
 448         ---help---
 449           If you say Y here, it will be possible to use a serial port as the
 450           system console (the system console is the device which receives all
 451           kernel messages and warnings and which allows logins in single user
 452           mode). This could be useful if some terminal or printer is connected
 453           to that serial port.
 454
 455           Even if you say Y here, the currently visible virtual console
 456           (/dev/tty0) will still be used as the system console by default, but
 457           you can alter that using a kernel command line option such as
 458           "console=ttyS1". (Try "man bootparam" or see the documentation of
 459           your boot loader (silo) about how to pass options to the kernel at
 460           boot time.)
 461
 462           If you don't have a graphics card installed and you say Y here, the
 463           kernel will automatically use the first serial line, /dev/ttyS0, as
 464           system console.
 465
 466           If unsure, say N.
 467
 468 config SPARC_LEON
 469         bool "Sparc Leon processor family"
 470         depends on SPARC32
 471         ---help---
 472           If you say Y here if you are running on a SPARC-LEON processor.
 473           The LEON processor is a synthesizable VHDL model of the
 474           SPARC-v8 standard. LEON is  part of the GRLIB collection of
 475           IP cores that are distributed under GPL. GRLIB can be downloaded
 476           from www.gaisler.com. You can download a sparc-linux cross-compilation
 477           toolchain at www.gaisler.com.
 478
 479 endmenu
 480
 481 menu "Bus options (PCI etc.)"
 482 config SBUS
 483         bool
 484         default y
 485
 486 config SBUSCHAR
 487         bool
 488         default y
 489
 490 config SUN_LDOMS
 491         bool "Sun Logical Domains support"
 492         depends on SPARC64
 493         help
 494           Say Y here is you want to support virtual devices via
 495           Logical Domains.
 496
 497 config PCI
 498         bool "Support for PCI and PS/2 keyboard/mouse"
 499         help
 500           Find out whether your system includes a PCI bus. PCI is the name of
 501           a bus system, i.e. the way the CPU talks to the other stuff inside
 502           your box.  If you say Y here, the kernel will include drivers and
 503           infrastructure code to support PCI bus devices.
 504
 505           CONFIG_PCI is needed for all JavaStation's (including MrCoffee),
 506           CP-1200, JavaEngine-1, Corona, Red October, and Serengeti SGSC.
 507           All of these platforms are extremely obscure, so say N if unsure.
 508
 509 config PCI_DOMAINS
 510         def_bool PCI if SPARC64
 511
 512 config PCI_SYSCALL
 513         def_bool PCI
 514
 515 source "drivers/pci/Kconfig"
 516
 517 source "drivers/pcmcia/Kconfig"
 518
 519 config SUN_OPENPROMFS
 520         tristate "Openprom tree appears in /proc/openprom"
 521         help
 522           If you say Y, the OpenPROM device tree will be available as a
 523           virtual file system, which you can mount to /proc/openprom by "mount
 524           -t openpromfs none /proc/openprom".
 525
 526           To compile the /proc/openprom support as a module, choose M here: the
 527           module will be called openpromfs.
 528
 529           Only choose N if you know in advance that you will not need to modify
 530           OpenPROM settings on the running system.
 531
 532 # Makefile helpers
 533 config SPARC32_PCI
 534         bool
 535         default y
 536         depends on SPARC32 && PCI
 537
 538 config SPARC64_PCI
 539         bool
 540         default y
 541         depends on SPARC64 && PCI
 542
 543 endmenu
 544
 545 menu "Executable file formats"
 546
 547 source "fs/Kconfig.binfmt"
 548
 549 config COMPAT
 550         bool
 551         depends on SPARC64
 552         default y
 553         select COMPAT_BINFMT_ELF
 554
 555 config SYSVIPC_COMPAT
 556         bool
 557         depends on COMPAT && SYSVIPC
 558         default y
 559
 560 endmenu
 561
 562 source "net/Kconfig"
 563
 564 source "drivers/Kconfig"
 565
 566 source "drivers/sbus/char/Kconfig"
 567
 568 source "fs/Kconfig"
 569
 570 source "arch/sparc/Kconfig.debug"
 571
 572 source "security/Kconfig"
 573
 574 source "crypto/Kconfig"
 575
 576 source "lib/Kconfig"