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