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_IRQ_WORK
  30         select HAVE_PERF_EVENTS
  31         select PERF_USE_VMALLOC
  32         select HAVE_DMA_ATTRS
  33         select HAVE_DMA_API_DEBUG
  34         select HAVE_ARCH_JUMP_LABEL
  35
  36 config SPARC32
  37         def_bool !64BIT
  38
  39 config SPARC64
  40         def_bool 64BIT
  41         select ARCH_SUPPORTS_MSI
  42         select HAVE_FUNCTION_TRACER
  43         select HAVE_FUNCTION_GRAPH_TRACER
  44         select HAVE_FUNCTION_GRAPH_FP_TEST
  45         select HAVE_FUNCTION_TRACE_MCOUNT_TEST
  46         select HAVE_KRETPROBES
  47         select HAVE_KPROBES
  48         select HAVE_MEMBLOCK
  49         select HAVE_SYSCALL_WRAPPERS
  50         select HAVE_DYNAMIC_FTRACE
  51         select HAVE_FTRACE_MCOUNT_RECORD
  52         select HAVE_SYSCALL_TRACEPOINTS
  53         select USE_GENERIC_SMP_HELPERS if SMP
  54         select RTC_DRV_CMOS
  55         select RTC_DRV_BQ4802
  56         select RTC_DRV_SUN4V
  57         select RTC_DRV_STARFIRE
  58         select HAVE_IRQ_WORK
  59         select HAVE_PERF_EVENTS
  60         select PERF_USE_VMALLOC
  61
  62 config ARCH_DEFCONFIG
  63         string
  64         default "arch/sparc/configs/sparc32_defconfig" if SPARC32
  65         default "arch/sparc/configs/sparc64_defconfig" if SPARC64
  66
  67 # CONFIG_BITS can be used at source level to get 32/64 bits
  68 config BITS
  69         int
  70         default 32 if SPARC32
  71         default 64 if SPARC64
  72
  73 config ARCH_USES_GETTIMEOFFSET
  74         bool
  75         default y if SPARC32
  76
  77 config GENERIC_CMOS_UPDATE
  78         bool
  79         default y
  80
  81 config GENERIC_CLOCKEVENTS
  82         bool
  83         default y if SPARC64
  84
  85 config IOMMU_HELPER
  86         bool
  87         default y if SPARC64
  88
  89 config QUICKLIST
  90         bool
  91         default y if SPARC64
  92
  93 config STACKTRACE_SUPPORT
  94         bool
  95         default y if SPARC64
  96
  97 config LOCKDEP_SUPPORT
  98         bool
  99         default y if SPARC64
 100
 101 config HAVE_LATENCYTOP_SUPPORT
 102         bool
 103         default y if SPARC64
 104
 105 config AUDIT_ARCH
 106         bool
 107         default y
 108
 109 config HAVE_SETUP_PER_CPU_AREA
 110         def_bool y if SPARC64
 111
 112 config NEED_PER_CPU_EMBED_FIRST_CHUNK
 113         def_bool y if SPARC64
 114
 115 config NEED_PER_CPU_PAGE_FIRST_CHUNK
 116         def_bool y if SPARC64
 117
 118 config GENERIC_HARDIRQS_NO__DO_IRQ
 119         bool
 120         def_bool y if SPARC64
 121
 122 config MMU
 123         bool
 124         default y
 125
 126 config HIGHMEM
 127         bool
 128         default y if SPARC32
 129
 130 config ZONE_DMA
 131         bool
 132         default y if SPARC32
 133
 134 config NEED_DMA_MAP_STATE
 135         def_bool y
 136
 137 config NEED_SG_DMA_LENGTH
 138         def_bool y
 139
 140 config GENERIC_ISA_DMA
 141         bool
 142         default y if SPARC32
 143
 144 config GENERIC_GPIO
 145         bool
 146         help
 147           Generic GPIO API support
 148
 149 config ARCH_NO_VIRT_TO_BUS
 150         def_bool y
 151
 152 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
 153         def_bool y if SPARC64
 154
 155 source "init/Kconfig"
 156
 157 source "kernel/Kconfig.freezer"
 158
 159 menu "Processor type and features"
 160
 161 config SMP
 162         bool "Symmetric multi-processing support (does not work on sun4/sun4c)"
 163         ---help---
 164           This enables support for systems with more than one CPU. If you have
 165           a system with only one CPU, say N. If you have a system with more
 166           than one CPU, say Y.
 167
 168           If you say N here, the kernel will run on single and multiprocessor
 169           machines, but will use only one CPU of a multiprocessor machine. If
 170           you say Y here, the kernel will run on many, but not all,
 171           singleprocessor machines. On a singleprocessor machine, the kernel
 172           will run faster if you say N here.
 173
 174           People using multiprocessor machines who say Y here should also say
 175           Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
 176           Management" code will be disabled if you say Y here.
 177
 178           See also <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO
 179           available at <http://www.tldp.org/docs.html#howto>.
 180
 181           If you don't know what to do here, say N.
 182
 183 config NR_CPUS
 184         int "Maximum number of CPUs"
 185         depends on SMP
 186         range 2 32 if SPARC32
 187         range 2 1024 if SPARC64
 188         default 32 if SPARC32
 189         default 64 if SPARC64
 190
 191 source kernel/Kconfig.hz
 192
 193 config RWSEM_GENERIC_SPINLOCK
 194         bool
 195         default y if SPARC32
 196
 197 config RWSEM_XCHGADD_ALGORITHM
 198         bool
 199         default y if SPARC64
 200
 201 config GENERIC_FIND_NEXT_BIT
 202         bool
 203         default y
 204
 205 config GENERIC_HWEIGHT
 206         bool
 207         default y if !ULTRA_HAS_POPULATION_COUNT
 208
 209 config GENERIC_CALIBRATE_DELAY
 210         bool
 211         default y
 212
 213 config ARCH_MAY_HAVE_PC_FDC
 214         bool
 215         default y
 216
 217 config EMULATED_CMPXCHG
 218         bool
 219         default y if SPARC32
 220         help
 221           Sparc32 does not have a CAS instruction like sparc64. cmpxchg()
 222           is emulated, and therefore it is not completely atomic.
 223
 224 # Makefile helpers
 225 config SPARC32_SMP
 226         bool
 227         default y
 228         depends on SPARC32 && SMP
 229
 230 config SPARC64_SMP
 231         bool
 232         default y
 233         depends on SPARC64 && SMP
 234
 235 config EARLYFB
 236         bool "Support for early boot text console"
 237         default y
 238         depends on SPARC64
 239         help
 240           Say Y here to enable a faster early framebuffer boot console.
 241
 242 choice
 243         prompt "Kernel page size" if SPARC64
 244         default SPARC64_PAGE_SIZE_8KB
 245
 246 config SPARC64_PAGE_SIZE_8KB
 247         bool "8KB"
 248         help
 249           This lets you select the page size of the kernel.
 250
 251           8KB and 64KB work quite well, since SPARC ELF sections
 252           provide for up to 64KB alignment.
 253
 254           If you don't know what to do, choose 8KB.
 255
 256 config SPARC64_PAGE_SIZE_64KB
 257         bool "64KB"
 258
 259 endchoice
 260
 261 config SECCOMP
 262         bool "Enable seccomp to safely compute untrusted bytecode"
 263         depends on SPARC64 && PROC_FS
 264         default y
 265         help
 266           This kernel feature is useful for number crunching applications
 267           that may need to compute untrusted bytecode during their
 268           execution. By using pipes or other transports made available to
 269           the process as file descriptors supporting the read/write
 270           syscalls, it's possible to isolate those applications in
 271           their own address space using seccomp. Once seccomp is
 272           enabled via /proc/<pid>/seccomp, it cannot be disabled
 273           and the task is only allowed to execute a few safe syscalls
 274           defined by each seccomp mode.
 275
 276           If unsure, say Y. Only embedded should say N here.
 277
 278 config HOTPLUG_CPU
 279         bool "Support for hot-pluggable CPUs"
 280         depends on SPARC64 && SMP
 281         select HOTPLUG
 282         help
 283           Say Y here to experiment with turning CPUs off and on.  CPUs
 284           can be controlled through /sys/devices/system/cpu/cpu#.
 285           Say N if you want to disable CPU hotplug.
 286
 287 config GENERIC_HARDIRQS
 288         bool
 289         default y if SPARC64
 290
 291 source "kernel/time/Kconfig"
 292
 293 if SPARC64
 294 source "drivers/cpufreq/Kconfig"
 295
 296 config US3_FREQ
 297         tristate "UltraSPARC-III CPU Frequency driver"
 298         depends on CPU_FREQ
 299         select CPU_FREQ_TABLE
 300         help
 301           This adds the CPUFreq driver for UltraSPARC-III processors.
 302
 303           For details, take a look at <file:Documentation/cpu-freq>.
 304
 305           If in doubt, say N.
 306
 307 config US2E_FREQ
 308         tristate "UltraSPARC-IIe CPU Frequency driver"
 309         depends on CPU_FREQ
 310         select CPU_FREQ_TABLE
 311         help
 312           This adds the CPUFreq driver for UltraSPARC-IIe processors.
 313
 314           For details, take a look at <file:Documentation/cpu-freq>.
 315
 316           If in doubt, say N.
 317
 318 endif
 319
 320 config US3_MC
 321         tristate "UltraSPARC-III Memory Controller driver"
 322         depends on SPARC64
 323         default y
 324         help
 325           This adds a driver for the UltraSPARC-III memory controller.
 326           Loading this driver allows exact mnemonic strings to be
 327           printed in the event of a memory error, so that the faulty DIMM
 328           on the motherboard can be matched to the error.
 329
 330           If in doubt, say Y, as this information can be very useful.
 331
 332 # Global things across all Sun machines.
 333 config GENERIC_LOCKBREAK
 334         bool
 335         default y
 336         depends on SPARC64 && SMP && PREEMPT
 337
 338 choice
 339         prompt "SPARC64 Huge TLB Page Size"
 340         depends on SPARC64 && HUGETLB_PAGE
 341         default HUGETLB_PAGE_SIZE_4MB
 342
 343 config HUGETLB_PAGE_SIZE_4MB
 344         bool "4MB"
 345
 346 config HUGETLB_PAGE_SIZE_512K
 347         bool "512K"
 348
 349 config HUGETLB_PAGE_SIZE_64K
 350         depends on !SPARC64_PAGE_SIZE_64KB
 351         bool "64K"
 352
 353 endchoice
 354
 355 config NUMA
 356         bool "NUMA support"
 357         depends on SPARC64 && SMP
 358
 359 config NODES_SHIFT
 360         int
 361         default "4"
 362         depends on NEED_MULTIPLE_NODES
 363
 364 # Some NUMA nodes have memory ranges that span
 365 # other nodes.  Even though a pfn is valid and
 366 # between a node's start and end pfns, it may not
 367 # reside on that node.  See memmap_init_zone()
 368 # for details.
 369 config NODES_SPAN_OTHER_NODES
 370         def_bool y
 371         depends on NEED_MULTIPLE_NODES
 372
 373 config ARCH_POPULATES_NODE_MAP
 374         def_bool y if SPARC64
 375
 376 config ARCH_SELECT_MEMORY_MODEL
 377         def_bool y if SPARC64
 378
 379 config ARCH_SPARSEMEM_ENABLE
 380         def_bool y if SPARC64
 381         select SPARSEMEM_VMEMMAP_ENABLE
 382
 383 config ARCH_SPARSEMEM_DEFAULT
 384         def_bool y if SPARC64
 385
 386 source "mm/Kconfig"
 387
 388 config SCHED_SMT
 389         bool "SMT (Hyperthreading) scheduler support"
 390         depends on SPARC64 && SMP
 391         default y
 392         help
 393           SMT scheduler support improves the CPU scheduler's decision making
 394           when dealing with SPARC cpus at a cost of slightly increased overhead
 395           in some places. If unsure say N here.
 396
 397 config SCHED_MC
 398         bool "Multi-core scheduler support"
 399         depends on SPARC64 && SMP
 400         default y
 401         help
 402           Multi-core scheduler support improves the CPU scheduler's decision
 403           making when dealing with multi-core CPU chips at a cost of slightly
 404           increased overhead in some places. If unsure say N here.
 405
 406 if SPARC64
 407 source "kernel/Kconfig.preempt"
 408 endif
 409
 410 config CMDLINE_BOOL
 411         bool "Default bootloader kernel arguments"
 412         depends on SPARC64
 413
 414 config CMDLINE
 415         string "Initial kernel command string"
 416         depends on CMDLINE_BOOL
 417         default "console=ttyS0,9600 root=/dev/sda1"
 418         help
 419           Say Y here if you want to be able to pass default arguments to
 420           the kernel. This will be overridden by the bootloader, if you
 421           use one (such as SILO). This is most useful if you want to boot
 422           a kernel from TFTP, and want default options to be available
 423           with having them passed on the command line.
 424
 425           NOTE: This option WILL override the PROM bootargs setting!
 426
 427 config SUN_PM
 428         bool
 429         default y if SPARC32
 430         help
 431           Enable power management and CPU standby features on supported
 432           SPARC platforms.
 433
 434 config SPARC_LED
 435         tristate "Sun4m LED driver"
 436         depends on SPARC32
 437         help
 438           This driver toggles the front-panel LED on sun4m systems
 439           in a user-specifiable manner.  Its state can be probed
 440           by reading /proc/led and its blinking mode can be changed
 441           via writes to /proc/led
 442
 443 config SERIAL_CONSOLE
 444         bool
 445         depends on SPARC32
 446         default y
 447         ---help---
 448           If you say Y here, it will be possible to use a serial port as the
 449           system console (the system console is the device which receives all
 450           kernel messages and warnings and which allows logins in single user
 451           mode). This could be useful if some terminal or printer is connected
 452           to that serial port.
 453
 454           Even if you say Y here, the currently visible virtual console
 455           (/dev/tty0) will still be used as the system console by default, but
 456           you can alter that using a kernel command line option such as
 457           "console=ttyS1". (Try "man bootparam" or see the documentation of
 458           your boot loader (silo) about how to pass options to the kernel at
 459           boot time.)
 460
 461           If you don't have a graphics card installed and you say Y here, the
 462           kernel will automatically use the first serial line, /dev/ttyS0, as
 463           system console.
 464
 465           If unsure, say N.
 466
 467 config SPARC_LEON
 468         bool "Sparc Leon processor family"
 469         depends on SPARC32
 470         ---help---
 471           If you say Y here if you are running on a SPARC-LEON processor.
 472           The LEON processor is a synthesizable VHDL model of the
 473           SPARC-v8 standard. LEON is  part of the GRLIB collection of
 474           IP cores that are distributed under GPL. GRLIB can be downloaded
 475           from www.gaisler.com. You can download a sparc-linux cross-compilation
 476           toolchain at www.gaisler.com.
 477
 478 endmenu
 479
 480 menu "Bus options (PCI etc.)"
 481 config SBUS
 482         bool
 483         default y
 484
 485 config SBUSCHAR
 486         bool
 487         default y
 488
 489 config SUN_LDOMS
 490         bool "Sun Logical Domains support"
 491         depends on SPARC64
 492         help
 493           Say Y here is you want to support virtual devices via
 494           Logical Domains.
 495
 496 config PCI
 497         bool "Support for PCI and PS/2 keyboard/mouse"
 498         help
 499           Find out whether your system includes a PCI bus. PCI is the name of
 500           a bus system, i.e. the way the CPU talks to the other stuff inside
 501           your box.  If you say Y here, the kernel will include drivers and
 502           infrastructure code to support PCI bus devices.
 503
 504           CONFIG_PCI is needed for all JavaStation's (including MrCoffee),
 505           CP-1200, JavaEngine-1, Corona, Red October, and Serengeti SGSC.
 506           All of these platforms are extremely obscure, so say N if unsure.
 507
 508 config PCI_DOMAINS
 509         def_bool PCI if SPARC64
 510
 511 config PCI_SYSCALL
 512         def_bool PCI
 513
 514 source "drivers/pci/Kconfig"
 515
 516 source "drivers/pcmcia/Kconfig"
 517
 518 config SUN_OPENPROMFS
 519         tristate "Openprom tree appears in /proc/openprom"
 520         help
 521           If you say Y, the OpenPROM device tree will be available as a
 522           virtual file system, which you can mount to /proc/openprom by "mount
 523           -t openpromfs none /proc/openprom".
 524
 525           To compile the /proc/openprom support as a module, choose M here: the
 526           module will be called openpromfs.
 527
 528           Only choose N if you know in advance that you will not need to modify
 529           OpenPROM settings on the running system.
 530
 531 # Makefile helpers
 532 config SPARC32_PCI
 533         bool
 534         default y
 535         depends on SPARC32 && PCI
 536
 537 config SPARC64_PCI
 538         bool
 539         default y
 540         depends on SPARC64 && PCI
 541
 542 endmenu
 543
 544 menu "Executable file formats"
 545
 546 source "fs/Kconfig.binfmt"
 547
 548 config COMPAT
 549         bool
 550         depends on SPARC64
 551         default y
 552         select COMPAT_BINFMT_ELF
 553
 554 config SYSVIPC_COMPAT
 555         bool
 556         depends on COMPAT && SYSVIPC
 557         default y
 558
 559 endmenu
 560
 561 source "net/Kconfig"
 562
 563 source "drivers/Kconfig"
 564
 565 source "drivers/sbus/char/Kconfig"
 566
 567 source "fs/Kconfig"
 568
 569 source "arch/sparc/Kconfig.debug"
 570
 571 source "security/Kconfig"
 572
 573 source "crypto/Kconfig"
 574
 575 source "lib/Kconfig"