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_MEMBLOCK
  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 NEED_SG_DMA_LENGTH
 137         def_bool y
 138
 139 config GENERIC_ISA_DMA
 140         bool
 141         default y if SPARC32
 142
 143 config GENERIC_GPIO
 144         bool
 145         help
 146           Generic GPIO API support
 147
 148 config ARCH_NO_VIRT_TO_BUS
 149         def_bool y
 150
 151 config OF
 152         def_bool y
 153
 154 config ARCH_SUPPORTS_DEBUG_PAGEALLOC
 155         def_bool y if SPARC64
 156
 157 source "init/Kconfig"
 158
 159 source "kernel/Kconfig.freezer"
 160
 161 menu "Processor type and features"
 162
 163 config SMP
 164         bool "Symmetric multi-processing support (does not work on sun4/sun4c)"
 165         ---help---
 166           This enables support for systems with more than one CPU. If you have
 167           a system with only one CPU, say N. If you have a system with more
 168           than one CPU, say Y.
 169
 170           If you say N here, the kernel will run on single and multiprocessor
 171           machines, but will use only one CPU of a multiprocessor machine. If
 172           you say Y here, the kernel will run on many, but not all,
 173           singleprocessor machines. On a singleprocessor machine, the kernel
 174           will run faster if you say N here.
 175
 176           People using multiprocessor machines who say Y here should also say
 177           Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
 178           Management" code will be disabled if you say Y here.
 179
 180           See also <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO
 181           available at <http://www.tldp.org/docs.html#howto>.
 182
 183           If you don't know what to do here, say N.
 184
 185 config NR_CPUS
 186         int "Maximum number of CPUs"
 187         depends on SMP
 188         range 2 32 if SPARC32
 189         range 2 1024 if SPARC64
 190         default 32 if SPARC32
 191         default 64 if SPARC64
 192
 193 source kernel/Kconfig.hz
 194
 195 config RWSEM_GENERIC_SPINLOCK
 196         bool
 197         default y if SPARC32
 198
 199 config RWSEM_XCHGADD_ALGORITHM
 200         bool
 201         default y if SPARC64
 202
 203 config GENERIC_FIND_NEXT_BIT
 204         bool
 205         default y
 206
 207 config GENERIC_HWEIGHT
 208         bool
 209         default y if !ULTRA_HAS_POPULATION_COUNT
 210
 211 config GENERIC_CALIBRATE_DELAY
 212         bool
 213         default y
 214
 215 config ARCH_MAY_HAVE_PC_FDC
 216         bool
 217         default y
 218
 219 config EMULATED_CMPXCHG
 220         bool
 221         default y if SPARC32
 222         help
 223           Sparc32 does not have a CAS instruction like sparc64. cmpxchg()
 224           is emulated, and therefore it is not completely atomic.
 225
 226 # Makefile helpers
 227 config SPARC32_SMP
 228         bool
 229         default y
 230         depends on SPARC32 && SMP
 231
 232 config SPARC64_SMP
 233         bool
 234         default y
 235         depends on SPARC64 && SMP
 236
 237 config EARLYFB
 238         bool "Support for early boot text console"
 239         default y
 240         depends on SPARC64
 241         help
 242           Say Y here to enable a faster early framebuffer boot console.
 243
 244 choice
 245         prompt "Kernel page size" if SPARC64
 246         default SPARC64_PAGE_SIZE_8KB
 247
 248 config SPARC64_PAGE_SIZE_8KB
 249         bool "8KB"
 250         help
 251           This lets you select the page size of the kernel.
 252
 253           8KB and 64KB work quite well, since SPARC ELF sections
 254           provide for up to 64KB alignment.
 255
 256           If you don't know what to do, choose 8KB.
 257
 258 config SPARC64_PAGE_SIZE_64KB
 259         bool "64KB"
 260
 261 endchoice
 262
 263 config SECCOMP
 264         bool "Enable seccomp to safely compute untrusted bytecode"
 265         depends on SPARC64 && PROC_FS
 266         default y
 267         help
 268           This kernel feature is useful for number crunching applications
 269           that may need to compute untrusted bytecode during their
 270           execution. By using pipes or other transports made available to
 271           the process as file descriptors supporting the read/write
 272           syscalls, it's possible to isolate those applications in
 273           their own address space using seccomp. Once seccomp is
 274           enabled via /proc/<pid>/seccomp, it cannot be disabled
 275           and the task is only allowed to execute a few safe syscalls
 276           defined by each seccomp mode.
 277
 278           If unsure, say Y. Only embedded should say N here.
 279
 280 config HOTPLUG_CPU
 281         bool "Support for hot-pluggable CPUs"
 282         depends on SPARC64 && SMP
 283         select HOTPLUG
 284         help
 285           Say Y here to experiment with turning CPUs off and on.  CPUs
 286           can be controlled through /sys/devices/system/cpu/cpu#.
 287           Say N if you want to disable CPU hotplug.
 288
 289 config GENERIC_HARDIRQS
 290         bool
 291         default y if SPARC64
 292
 293 source "kernel/time/Kconfig"
 294
 295 if SPARC64
 296 source "drivers/cpufreq/Kconfig"
 297
 298 config US3_FREQ
 299         tristate "UltraSPARC-III CPU Frequency driver"
 300         depends on CPU_FREQ
 301         select CPU_FREQ_TABLE
 302         help
 303           This adds the CPUFreq driver for UltraSPARC-III processors.
 304
 305           For details, take a look at <file:Documentation/cpu-freq>.
 306
 307           If in doubt, say N.
 308
 309 config US2E_FREQ
 310         tristate "UltraSPARC-IIe CPU Frequency driver"
 311         depends on CPU_FREQ
 312         select CPU_FREQ_TABLE
 313         help
 314           This adds the CPUFreq driver for UltraSPARC-IIe processors.
 315
 316           For details, take a look at <file:Documentation/cpu-freq>.
 317
 318           If in doubt, say N.
 319
 320 endif
 321
 322 config US3_MC
 323         tristate "UltraSPARC-III Memory Controller driver"
 324         depends on SPARC64
 325         default y
 326         help
 327           This adds a driver for the UltraSPARC-III memory controller.
 328           Loading this driver allows exact mnemonic strings to be
 329           printed in the event of a memory error, so that the faulty DIMM
 330           on the motherboard can be matched to the error.
 331
 332           If in doubt, say Y, as this information can be very useful.
 333
 334 # Global things across all Sun machines.
 335 config GENERIC_LOCKBREAK
 336         bool
 337         default y
 338         depends on SPARC64 && SMP && PREEMPT
 339
 340 choice
 341         prompt "SPARC64 Huge TLB Page Size"
 342         depends on SPARC64 && HUGETLB_PAGE
 343         default HUGETLB_PAGE_SIZE_4MB
 344
 345 config HUGETLB_PAGE_SIZE_4MB
 346         bool "4MB"
 347
 348 config HUGETLB_PAGE_SIZE_512K
 349         bool "512K"
 350
 351 config HUGETLB_PAGE_SIZE_64K
 352         depends on !SPARC64_PAGE_SIZE_64KB
 353         bool "64K"
 354
 355 endchoice
 356
 357 config NUMA
 358         bool "NUMA support"
 359         depends on SPARC64 && SMP
 360
 361 config NODES_SHIFT
 362         int
 363         default "4"
 364         depends on NEED_MULTIPLE_NODES
 365
 366 # Some NUMA nodes have memory ranges that span
 367 # other nodes.  Even though a pfn is valid and
 368 # between a node's start and end pfns, it may not
 369 # reside on that node.  See memmap_init_zone()
 370 # for details.
 371 config NODES_SPAN_OTHER_NODES
 372         def_bool y
 373         depends on NEED_MULTIPLE_NODES
 374
 375 config ARCH_POPULATES_NODE_MAP
 376         def_bool y if SPARC64
 377
 378 config ARCH_SELECT_MEMORY_MODEL
 379         def_bool y if SPARC64
 380
 381 config ARCH_SPARSEMEM_ENABLE
 382         def_bool y if SPARC64
 383         select SPARSEMEM_VMEMMAP_ENABLE
 384
 385 config ARCH_SPARSEMEM_DEFAULT
 386         def_bool y if SPARC64
 387
 388 source "mm/Kconfig"
 389
 390 config SCHED_SMT
 391         bool "SMT (Hyperthreading) scheduler support"
 392         depends on SPARC64 && SMP
 393         default y
 394         help
 395           SMT scheduler support improves the CPU scheduler's decision making
 396           when dealing with SPARC cpus at a cost of slightly increased overhead
 397           in some places. If unsure say N here.
 398
 399 config SCHED_MC
 400         bool "Multi-core scheduler support"
 401         depends on SPARC64 && SMP
 402         default y
 403         help
 404           Multi-core scheduler support improves the CPU scheduler's decision
 405           making when dealing with multi-core CPU chips at a cost of slightly
 406           increased overhead in some places. If unsure say N here.
 407
 408 if SPARC64
 409 source "kernel/Kconfig.preempt"
 410 endif
 411
 412 config CMDLINE_BOOL
 413         bool "Default bootloader kernel arguments"
 414         depends on SPARC64
 415
 416 config CMDLINE
 417         string "Initial kernel command string"
 418         depends on CMDLINE_BOOL
 419         default "console=ttyS0,9600 root=/dev/sda1"
 420         help
 421           Say Y here if you want to be able to pass default arguments to
 422           the kernel. This will be overridden by the bootloader, if you
 423           use one (such as SILO). This is most useful if you want to boot
 424           a kernel from TFTP, and want default options to be available
 425           with having them passed on the command line.
 426
 427           NOTE: This option WILL override the PROM bootargs setting!
 428
 429 config SUN_PM
 430         bool
 431         default y if SPARC32
 432         help
 433           Enable power management and CPU standby features on supported
 434           SPARC platforms.
 435
 436 config SPARC_LED
 437         tristate "Sun4m LED driver"
 438         depends on SPARC32
 439         help
 440           This driver toggles the front-panel LED on sun4m systems
 441           in a user-specifiable manner.  Its state can be probed
 442           by reading /proc/led and its blinking mode can be changed
 443           via writes to /proc/led
 444
 445 config SERIAL_CONSOLE
 446         bool
 447         depends on SPARC32
 448         default y
 449         ---help---
 450           If you say Y here, it will be possible to use a serial port as the
 451           system console (the system console is the device which receives all
 452           kernel messages and warnings and which allows logins in single user
 453           mode). This could be useful if some terminal or printer is connected
 454           to that serial port.
 455
 456           Even if you say Y here, the currently visible virtual console
 457           (/dev/tty0) will still be used as the system console by default, but
 458           you can alter that using a kernel command line option such as
 459           "console=ttyS1". (Try "man bootparam" or see the documentation of
 460           your boot loader (silo) about how to pass options to the kernel at
 461           boot time.)
 462
 463           If you don't have a graphics card installed and you say Y here, the
 464           kernel will automatically use the first serial line, /dev/ttyS0, as
 465           system console.
 466
 467           If unsure, say N.
 468
 469 config SPARC_LEON
 470         bool "Sparc Leon processor family"
 471         depends on SPARC32
 472         ---help---
 473           If you say Y here if you are running on a SPARC-LEON processor.
 474           The LEON processor is a synthesizable VHDL model of the
 475           SPARC-v8 standard. LEON is  part of the GRLIB collection of
 476           IP cores that are distributed under GPL. GRLIB can be downloaded
 477           from www.gaisler.com. You can download a sparc-linux cross-compilation
 478           toolchain at www.gaisler.com.
 479
 480 endmenu
 481
 482 menu "Bus options (PCI etc.)"
 483 config SBUS
 484         bool
 485         default y
 486
 487 config SBUSCHAR
 488         bool
 489         default y
 490
 491 config SUN_LDOMS
 492         bool "Sun Logical Domains support"
 493         depends on SPARC64
 494         help
 495           Say Y here is you want to support virtual devices via
 496           Logical Domains.
 497
 498 config PCI
 499         bool "Support for PCI and PS/2 keyboard/mouse"
 500         help
 501           Find out whether your system includes a PCI bus. PCI is the name of
 502           a bus system, i.e. the way the CPU talks to the other stuff inside
 503           your box.  If you say Y here, the kernel will include drivers and
 504           infrastructure code to support PCI bus devices.
 505
 506           CONFIG_PCI is needed for all JavaStation's (including MrCoffee),
 507           CP-1200, JavaEngine-1, Corona, Red October, and Serengeti SGSC.
 508           All of these platforms are extremely obscure, so say N if unsure.
 509
 510 config PCI_DOMAINS
 511         def_bool PCI if SPARC64
 512
 513 config PCI_SYSCALL
 514         def_bool PCI
 515
 516 source "drivers/pci/Kconfig"
 517
 518 source "drivers/pcmcia/Kconfig"
 519
 520 config SUN_OPENPROMFS
 521         tristate "Openprom tree appears in /proc/openprom"
 522         help
 523           If you say Y, the OpenPROM device tree will be available as a
 524           virtual file system, which you can mount to /proc/openprom by "mount
 525           -t openpromfs none /proc/openprom".
 526
 527           To compile the /proc/openprom support as a module, choose M here: the
 528           module will be called openpromfs.
 529
 530           Only choose N if you know in advance that you will not need to modify
 531           OpenPROM settings on the running system.
 532
 533 # Makefile helpers
 534 config SPARC32_PCI
 535         bool
 536         default y
 537         depends on SPARC32 && PCI
 538
 539 config SPARC64_PCI
 540         bool
 541         default y
 542         depends on SPARC64 && PCI
 543
 544 endmenu
 545
 546 menu "Executable file formats"
 547
 548 source "fs/Kconfig.binfmt"
 549
 550 config COMPAT
 551         bool
 552         depends on SPARC64
 553         default y
 554         select COMPAT_BINFMT_ELF
 555
 556 config SYSVIPC_COMPAT
 557         bool
 558         depends on COMPAT && SYSVIPC
 559         default y
 560
 561 endmenu
 562
 563 source "net/Kconfig"
 564
 565 source "drivers/Kconfig"
 566
 567 source "drivers/sbus/char/Kconfig"
 568
 569 source "fs/Kconfig"
 570
 571 source "arch/sparc/Kconfig.debug"
 572
 573 source "security/Kconfig"
 574
 575 source "crypto/Kconfig"
 576
 577 source "lib/Kconfig"