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