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