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_FUNCTION_GRAPH_TRACER
  41         select HAVE_FUNCTION_GRAPH_FP_TEST
  42         select HAVE_FUNCTION_TRACE_MCOUNT_TEST
  43         select HAVE_KRETPROBES
  44         select HAVE_KPROBES
  45         select HAVE_LMB
  46         select HAVE_SYSCALL_WRAPPERS
  47         select HAVE_DYNAMIC_FTRACE
  48         select HAVE_FTRACE_MCOUNT_RECORD
  49         select HAVE_SYSCALL_TRACEPOINTS
  50         select USE_GENERIC_SMP_HELPERS if SMP
  51         select RTC_DRV_CMOS
  52         select RTC_DRV_BQ4802
  53         select RTC_DRV_SUN4V
  54         select RTC_DRV_STARFIRE
  55         select HAVE_PERF_EVENTS
  56         select PERF_USE_VMALLOC
  57
  58 config ARCH_DEFCONFIG
  59         string
  60         default "arch/sparc/configs/sparc32_defconfig" if SPARC32
  61         default "arch/sparc/configs/sparc64_defconfig" if SPARC64
  62
  63 # CONFIG_BITS can be used at source level to get 32/64 bits
  64 config BITS
  65         int
  66         default 32 if SPARC32
  67         default 64 if SPARC64
  68
  69 config GENERIC_TIME
  70         def_bool y
  71
  72 config ARCH_USES_GETTIMEOFFSET
  73         bool
  74         default y if SPARC32
  75
  76 config GENERIC_CMOS_UPDATE
  77         bool
  78         default y
  79
  80 config GENERIC_CLOCKEVENTS
  81         bool
  82         default y if SPARC64
  83
  84 config IOMMU_HELPER
  85         bool
  86         default y if SPARC64
  87
  88 config QUICKLIST
  89         bool
  90         default y if SPARC64
  91
  92 config STACKTRACE_SUPPORT
  93         bool
  94         default y if SPARC64
  95
  96 config LOCKDEP_SUPPORT
  97         bool
  98         default y if SPARC64
  99
 100 config HAVE_LATENCYTOP_SUPPORT
 101         bool
 102         default y if SPARC64
 103
 104 config AUDIT_ARCH
 105         bool
 106         default y
 107
 108 config HAVE_SETUP_PER_CPU_AREA
 109         def_bool y if SPARC64
 110
 111 config NEED_PER_CPU_EMBED_FIRST_CHUNK
 112         def_bool y if SPARC64
 113
 114 config NEED_PER_CPU_PAGE_FIRST_CHUNK
 115         def_bool y if SPARC64
 116
 117 config GENERIC_HARDIRQS_NO__DO_IRQ
 118         bool
 119         def_bool y if SPARC64
 120
 121 config MMU
 122         bool
 123         default y
 124
 125 config HIGHMEM
 126         bool
 127         default y if SPARC32
 128
 129 config ZONE_DMA
 130         bool
 131         default y if SPARC32
 132
 133 config NEED_DMA_MAP_STATE
 134         def_bool y
 135
 136 config GENERIC_ISA_DMA
 137         bool
 138         default y if SPARC32
 139
 140 config GENERIC_GPIO
 141         bool
 142         help
 143           Generic GPIO API support
 144
 145 config ARCH_NO_VIRT_TO_BUS
 146         def_bool y
 147
 148 config OF
 149         def_bool y
 150
 151 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
 152         def_bool y if SPARC64
 153
 154 source "init/Kconfig"
 155
 156 source "kernel/Kconfig.freezer"
 157
 158 menu "Processor type and features"
 159
 160 config SMP
 161         bool "Symmetric multi-processing support (does not work on sun4/sun4c)"
 162         ---help---
 163           This enables support for systems with more than one CPU. If you have
 164           a system with only one CPU, say N. If you have a system with more
 165           than one CPU, say Y.
 166
 167           If you say N here, the kernel will run on single and multiprocessor
 168           machines, but will use only one CPU of a multiprocessor machine. If
 169           you say Y here, the kernel will run on many, but not all,
 170           singleprocessor machines. On a singleprocessor machine, the kernel
 171           will run faster if you say N here.
 172
 173           People using multiprocessor machines who say Y here should also say
 174           Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
 175           Management" code will be disabled if you say Y here.
 176
 177           See also <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO
 178           available at <http://www.tldp.org/docs.html#howto>.
 179
 180           If you don't know what to do here, say N.
 181
 182 config NR_CPUS
 183         int "Maximum number of CPUs"
 184         depends on SMP
 185         range 2 32 if SPARC32
 186         range 2 1024 if SPARC64
 187         default 32 if SPARC32
 188         default 64 if SPARC64
 189
 190 source kernel/Kconfig.hz
 191
 192 config RWSEM_GENERIC_SPINLOCK
 193         bool
 194         default y if SPARC32
 195
 196 config RWSEM_XCHGADD_ALGORITHM
 197         bool
 198         default y if SPARC64
 199
 200 config GENERIC_FIND_NEXT_BIT
 201         bool
 202         default y
 203
 204 config GENERIC_HWEIGHT
 205         bool
 206         default y if !ULTRA_HAS_POPULATION_COUNT
 207
 208 config GENERIC_CALIBRATE_DELAY
 209         bool
 210         default y
 211
 212 config ARCH_MAY_HAVE_PC_FDC
 213         bool
 214         default y
 215
 216 config EMULATED_CMPXCHG
 217         bool
 218         default y if SPARC32
 219         help
 220           Sparc32 does not have a CAS instruction like sparc64. cmpxchg()
 221           is emulated, and therefore it is not completely atomic.
 222
 223 # Makefile helpers
 224 config SPARC32_SMP
 225         bool
 226         default y
 227         depends on SPARC32 && SMP
 228
 229 config SPARC64_SMP
 230         bool
 231         default y
 232         depends on SPARC64 && SMP
 233
 234 config EARLYFB
 235         bool "Support for early boot text console"
 236         default y
 237         depends on SPARC64
 238         help
 239           Say Y here to enable a faster early framebuffer boot console.
 240
 241 choice
 242         prompt "Kernel page size" if SPARC64
 243         default SPARC64_PAGE_SIZE_8KB
 244
 245 config SPARC64_PAGE_SIZE_8KB
 246         bool "8KB"
 247         help
 248           This lets you select the page size of the kernel.
 249
 250           8KB and 64KB work quite well, since SPARC ELF sections
 251           provide for up to 64KB alignment.
 252
 253           If you don't know what to do, choose 8KB.
 254
 255 config SPARC64_PAGE_SIZE_64KB
 256         bool "64KB"
 257
 258 endchoice
 259
 260 config SECCOMP
 261         bool "Enable seccomp to safely compute untrusted bytecode"
 262         depends on SPARC64 && PROC_FS
 263         default y
 264         help
 265           This kernel feature is useful for number crunching applications
 266           that may need to compute untrusted bytecode during their
 267           execution. By using pipes or other transports made available to
 268           the process as file descriptors supporting the read/write
 269           syscalls, it's possible to isolate those applications in
 270           their own address space using seccomp. Once seccomp is
 271           enabled via /proc/<pid>/seccomp, it cannot be disabled
 272           and the task is only allowed to execute a few safe syscalls
 273           defined by each seccomp mode.
 274
 275           If unsure, say Y. Only embedded should say N here.
 276
 277 config HOTPLUG_CPU
 278         bool "Support for hot-pluggable CPUs"
 279         depends on SPARC64 && SMP
 280         select HOTPLUG
 281         help
 282           Say Y here to experiment with turning CPUs off and on.  CPUs
 283           can be controlled through /sys/devices/system/cpu/cpu#.
 284           Say N if you want to disable CPU hotplug.
 285
 286 config GENERIC_HARDIRQS
 287         bool
 288         default y if SPARC64
 289
 290 source "kernel/time/Kconfig"
 291
 292 if SPARC64
 293 source "drivers/cpufreq/Kconfig"
 294
 295 config US3_FREQ
 296         tristate "UltraSPARC-III CPU Frequency driver"
 297         depends on CPU_FREQ
 298         select CPU_FREQ_TABLE
 299         help
 300           This adds the CPUFreq driver for UltraSPARC-III processors.
 301
 302           For details, take a look at <file:Documentation/cpu-freq>.
 303
 304           If in doubt, say N.
 305
 306 config US2E_FREQ
 307         tristate "UltraSPARC-IIe CPU Frequency driver"
 308         depends on CPU_FREQ
 309         select CPU_FREQ_TABLE
 310         help
 311           This adds the CPUFreq driver for UltraSPARC-IIe processors.
 312
 313           For details, take a look at <file:Documentation/cpu-freq>.
 314
 315           If in doubt, say N.
 316
 317 endif
 318
 319 config US3_MC
 320         tristate "UltraSPARC-III Memory Controller driver"
 321         depends on SPARC64
 322         default y
 323         help
 324           This adds a driver for the UltraSPARC-III memory controller.
 325           Loading this driver allows exact mnemonic strings to be
 326           printed in the event of a memory error, so that the faulty DIMM
 327           on the motherboard can be matched to the error.
 328
 329           If in doubt, say Y, as this information can be very useful.
 330
 331 # Global things across all Sun machines.
 332 config GENERIC_LOCKBREAK
 333         bool
 334         default y
 335         depends on SPARC64 && SMP && PREEMPT
 336
 337 choice
 338         prompt "SPARC64 Huge TLB Page Size"
 339         depends on SPARC64 && HUGETLB_PAGE
 340         default HUGETLB_PAGE_SIZE_4MB
 341
 342 config HUGETLB_PAGE_SIZE_4MB
 343         bool "4MB"
 344
 345 config HUGETLB_PAGE_SIZE_512K
 346         bool "512K"
 347
 348 config HUGETLB_PAGE_SIZE_64K
 349         depends on !SPARC64_PAGE_SIZE_64KB
 350         bool "64K"
 351
 352 endchoice
 353
 354 config NUMA
 355         bool "NUMA support"
 356         depends on SPARC64 && SMP
 357
 358 config NODES_SHIFT
 359         int
 360         default "4"
 361         depends on NEED_MULTIPLE_NODES
 362
 363 # Some NUMA nodes have memory ranges that span
 364 # other nodes.  Even though a pfn is valid and
 365 # between a node's start and end pfns, it may not
 366 # reside on that node.  See memmap_init_zone()
 367 # for details.
 368 config NODES_SPAN_OTHER_NODES
 369         def_bool y
 370         depends on NEED_MULTIPLE_NODES
 371
 372 config ARCH_POPULATES_NODE_MAP
 373         def_bool y if SPARC64
 374
 375 config ARCH_SELECT_MEMORY_MODEL
 376         def_bool y if SPARC64
 377
 378 config ARCH_SPARSEMEM_ENABLE
 379         def_bool y if SPARC64
 380         select SPARSEMEM_VMEMMAP_ENABLE
 381
 382 config ARCH_SPARSEMEM_DEFAULT
 383         def_bool y if SPARC64
 384
 385 source "mm/Kconfig"
 386
 387 config SCHED_SMT
 388         bool "SMT (Hyperthreading) scheduler support"
 389         depends on SPARC64 && SMP
 390         default y
 391         help
 392           SMT scheduler support improves the CPU scheduler's decision making
 393           when dealing with SPARC cpus at a cost of slightly increased overhead
 394           in some places. If unsure say N here.
 395
 396 config SCHED_MC
 397         bool "Multi-core scheduler support"
 398         depends on SPARC64 && SMP
 399         default y
 400         help
 401           Multi-core scheduler support improves the CPU scheduler's decision
 402           making when dealing with multi-core CPU chips at a cost of slightly
 403           increased overhead in some places. If unsure say N here.
 404
 405 if SPARC64
 406 source "kernel/Kconfig.preempt"
 407 endif
 408
 409 config CMDLINE_BOOL
 410         bool "Default bootloader kernel arguments"
 411         depends on SPARC64
 412
 413 config CMDLINE
 414         string "Initial kernel command string"
 415         depends on CMDLINE_BOOL
 416         default "console=ttyS0,9600 root=/dev/sda1"
 417         help
 418           Say Y here if you want to be able to pass default arguments to
 419           the kernel. This will be overridden by the bootloader, if you
 420           use one (such as SILO). This is most useful if you want to boot
 421           a kernel from TFTP, and want default options to be available
 422           with having them passed on the command line.
 423
 424           NOTE: This option WILL override the PROM bootargs setting!
 425
 426 config SUN_PM
 427         bool
 428         default y if SPARC32
 429         help
 430           Enable power management and CPU standby features on supported
 431           SPARC platforms.
 432
 433 config SPARC_LED
 434         tristate "Sun4m LED driver"
 435         depends on SPARC32
 436         help
 437           This driver toggles the front-panel LED on sun4m systems
 438           in a user-specifiable manner.  Its state can be probed
 439           by reading /proc/led and its blinking mode can be changed
 440           via writes to /proc/led
 441
 442 config SERIAL_CONSOLE
 443         bool
 444         depends on SPARC32
 445         default y
 446         ---help---
 447           If you say Y here, it will be possible to use a serial port as the
 448           system console (the system console is the device which receives all
 449           kernel messages and warnings and which allows logins in single user
 450           mode). This could be useful if some terminal or printer is connected
 451           to that serial port.
 452
 453           Even if you say Y here, the currently visible virtual console
 454           (/dev/tty0) will still be used as the system console by default, but
 455           you can alter that using a kernel command line option such as
 456           "console=ttyS1". (Try "man bootparam" or see the documentation of
 457           your boot loader (silo) about how to pass options to the kernel at
 458           boot time.)
 459
 460           If you don't have a graphics card installed and you say Y here, the
 461           kernel will automatically use the first serial line, /dev/ttyS0, as
 462           system console.
 463
 464           If unsure, say N.
 465
 466 config SPARC_LEON
 467         bool "Sparc Leon processor family"
 468         depends on SPARC32
 469         ---help---
 470           If you say Y here if you are running on a SPARC-LEON processor.
 471           The LEON processor is a synthesizable VHDL model of the
 472           SPARC-v8 standard. LEON is  part of the GRLIB collection of
 473           IP cores that are distributed under GPL. GRLIB can be downloaded
 474           from www.gaisler.com. You can download a sparc-linux cross-compilation
 475           toolchain at www.gaisler.com.
 476
 477 endmenu
 478
 479 menu "Bus options (PCI etc.)"
 480 config SBUS
 481         bool
 482         default y
 483
 484 config SBUSCHAR
 485         bool
 486         default y
 487
 488 config SUN_LDOMS
 489         bool "Sun Logical Domains support"
 490         depends on SPARC64
 491         help
 492           Say Y here is you want to support virtual devices via
 493           Logical Domains.
 494
 495 config PCI
 496         bool "Support for PCI and PS/2 keyboard/mouse"
 497         help
 498           Find out whether your system includes a PCI bus. PCI is the name of
 499           a bus system, i.e. the way the CPU talks to the other stuff inside
 500           your box.  If you say Y here, the kernel will include drivers and
 501           infrastructure code to support PCI bus devices.
 502
 503           CONFIG_PCI is needed for all JavaStation's (including MrCoffee),
 504           CP-1200, JavaEngine-1, Corona, Red October, and Serengeti SGSC.
 505           All of these platforms are extremely obscure, so say N if unsure.
 506
 507 config PCI_DOMAINS
 508         def_bool PCI if SPARC64
 509
 510 config PCI_SYSCALL
 511         def_bool PCI
 512
 513 source "drivers/pci/Kconfig"
 514
 515 source "drivers/pcmcia/Kconfig"
 516
 517 config SUN_OPENPROMFS
 518         tristate "Openprom tree appears in /proc/openprom"
 519         help
 520           If you say Y, the OpenPROM device tree will be available as a
 521           virtual file system, which you can mount to /proc/openprom by "mount
 522           -t openpromfs none /proc/openprom".
 523
 524           To compile the /proc/openprom support as a module, choose M here: the
 525           module will be called openpromfs.
 526
 527           Only choose N if you know in advance that you will not need to modify
 528           OpenPROM settings on the running system.
 529
 530 # Makefile helpers
 531 config SPARC32_PCI
 532         bool
 533         default y
 534         depends on SPARC32 && PCI
 535
 536 config SPARC64_PCI
 537         bool
 538         default y
 539         depends on SPARC64 && PCI
 540
 541 endmenu
 542
 543 menu "Executable file formats"
 544
 545 source "fs/Kconfig.binfmt"
 546
 547 config COMPAT
 548         bool
 549         depends on SPARC64
 550         default y
 551         select COMPAT_BINFMT_ELF
 552
 553 config SYSVIPC_COMPAT
 554         bool
 555         depends on COMPAT && SYSVIPC
 556         default y
 557
 558 endmenu
 559
 560 source "net/Kconfig"
 561
 562 source "drivers/Kconfig"
 563
 564 source "drivers/sbus/char/Kconfig"
 565
 566 source "fs/Kconfig"
 567
 568 source "arch/sparc/Kconfig.debug"
 569
 570 source "security/Kconfig"
 571
 572 source "crypto/Kconfig"
 573
 574 source "lib/Kconfig"