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