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