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 SPARC
   8         bool
   9         default y
  10         select HAVE_IDE
  11         select HAVE_OPROFILE
  12         select HAVE_ARCH_KGDB if !SMP || SPARC64
  13         select HAVE_ARCH_TRACEHOOK
  14         select ARCH_WANT_OPTIONAL_GPIOLIB
  15         select RTC_CLASS
  16         select RTC_DRV_M48T59
  17
  18 # Identify this as a Sparc32 build
  19 config SPARC32
  20         bool
  21         default y if ARCH = "sparc"
  22         help
  23           SPARC is a family of RISC microprocessors designed and marketed by
  24           Sun Microsystems, incorporated.  They are very widely found in Sun
  25           workstations and clones. This port covers the original 32-bit SPARC;
  26           it is old and stable and usually considered one of the "big three"
  27           along with the Intel and Alpha ports.  The UltraLinux project
  28           maintains both the SPARC32 and SPARC64 ports; its web page is
  29           available at <http://www.ultralinux.org/>.
  30
  31 config SPARC64
  32         bool
  33         default y if ARCH = "sparc64"
  34         select ARCH_SUPPORTS_MSI
  35         select HAVE_FUNCTION_TRACER
  36         select HAVE_KRETPROBES
  37         select HAVE_KPROBES
  38         select HAVE_LMB
  39         select USE_GENERIC_SMP_HELPERS if SMP
  40         select RTC_DRV_CMOS
  41         select RTC_DRV_BQ4802
  42         select RTC_DRV_SUN4V
  43         select RTC_DRV_STARFIRE
  44
  45 config ARCH_DEFCONFIG
  46         string
  47         default "arch/sparc/configs/sparc32_defconfig" if SPARC32
  48         default "arch/sparc/configs/sparc64_defconfig" if SPARC64
  49
  50 # CONFIG_BITS can be used at source level to get 32/64 bits
  51 config BITS
  52         int
  53         default 32 if SPARC32
  54         default 64 if SPARC64
  55
  56 config 64BIT
  57         def_bool y if SPARC64
  58
  59 config GENERIC_TIME
  60         bool
  61         default y if SPARC64
  62
  63 config GENERIC_CMOS_UPDATE
  64         bool
  65         default y if SPARC64
  66
  67 config GENERIC_CLOCKEVENTS
  68         bool
  69         default y if SPARC64
  70
  71 config IOMMU_HELPER
  72         bool
  73         default y if SPARC64
  74
  75 config QUICKLIST
  76         bool
  77         default y if SPARC64
  78
  79 config STACKTRACE_SUPPORT
  80         bool
  81         default y if SPARC64
  82
  83 config LOCKDEP_SUPPORT
  84         bool
  85         default y if SPARC64
  86
  87 config HAVE_LATENCYTOP_SUPPORT
  88         bool
  89         default y if SPARC64
  90
  91 config AUDIT_ARCH
  92         bool
  93         default y
  94
  95 config HAVE_SETUP_PER_CPU_AREA
  96         def_bool y if SPARC64
  97
  98 config GENERIC_HARDIRQS_NO__DO_IRQ
  99         bool
 100         def_bool y if SPARC64
 101
 102 config MMU
 103         bool
 104         default y
 105
 106 config HIGHMEM
 107         bool
 108         default y if SPARC32
 109
 110 config ZONE_DMA
 111         bool
 112         default y if SPARC32
 113
 114 config GENERIC_ISA_DMA
 115         bool
 116         default y if SPARC32
 117
 118 config GENERIC_GPIO
 119         bool
 120         help
 121           Generic GPIO API support
 122
 123 config ARCH_NO_VIRT_TO_BUS
 124         def_bool y
 125
 126 config OF
 127         def_bool y
 128
 129 source "init/Kconfig"
 130
 131 source "kernel/Kconfig.freezer"
 132
 133 menu "Processor type and features"
 134
 135 config SMP
 136         bool "Symmetric multi-processing support (does not work on sun4/sun4c)"
 137         ---help---
 138           This enables support for systems with more than one CPU. If you have
 139           a system with only one CPU, say N. If you have a system with more
 140           than one CPU, say Y.
 141
 142           If you say N here, the kernel will run on single and multiprocessor
 143           machines, but will use only one CPU of a multiprocessor machine. If
 144           you say Y here, the kernel will run on many, but not all,
 145           singleprocessor machines. On a singleprocessor machine, the kernel
 146           will run faster if you say N here.
 147
 148           People using multiprocessor machines who say Y here should also say
 149           Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
 150           Management" code will be disabled if you say Y here.
 151
 152           See also <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO
 153           available at <http://www.tldp.org/docs.html#howto>.
 154
 155           If you don't know what to do here, say N.
 156
 157 config NR_CPUS
 158         int "Maximum number of CPUs"
 159         depends on SMP
 160         range 2 32 if SPARC32
 161         range 2 1024 if SPARC64
 162         default 32 if SPARC32
 163         default 64 if SPARC64
 164
 165 source kernel/Kconfig.hz
 166
 167 config RWSEM_GENERIC_SPINLOCK
 168         bool
 169         default y if SPARC32
 170
 171 config RWSEM_XCHGADD_ALGORITHM
 172         bool
 173         default y if SPARC64
 174
 175 config GENERIC_FIND_NEXT_BIT
 176         bool
 177         default y
 178
 179 config GENERIC_HWEIGHT
 180         bool
 181         default y if !ULTRA_HAS_POPULATION_COUNT
 182
 183 config GENERIC_CALIBRATE_DELAY
 184         bool
 185         default y
 186
 187 config ARCH_MAY_HAVE_PC_FDC
 188         bool
 189         default y
 190
 191 config ARCH_HAS_ILOG2_U32
 192         bool
 193         default n
 194
 195 config ARCH_HAS_ILOG2_U64
 196         bool
 197         default n
 198
 199 config EMULATED_CMPXCHG
 200         bool
 201         default y if SPARC32
 202         help
 203           Sparc32 does not have a CAS instruction like sparc64. cmpxchg()
 204           is emulated, and therefore it is not completely atomic.
 205
 206 # Makefile helpers
 207 config SPARC32_SMP
 208         bool
 209         default y
 210         depends on SPARC32 && SMP
 211
 212 config SPARC64_SMP
 213         bool
 214         default y
 215         depends on SPARC64 && SMP
 216
 217 choice
 218         prompt "Kernel page size" if SPARC64
 219         default SPARC64_PAGE_SIZE_8KB
 220
 221 config SPARC64_PAGE_SIZE_8KB
 222         bool "8KB"
 223         help
 224           This lets you select the page size of the kernel.
 225
 226           8KB and 64KB work quite well, since SPARC ELF sections
 227           provide for up to 64KB alignment.
 228
 229           If you don't know what to do, choose 8KB.
 230
 231 config SPARC64_PAGE_SIZE_64KB
 232         bool "64KB"
 233
 234 endchoice
 235
 236 config SECCOMP
 237         bool "Enable seccomp to safely compute untrusted bytecode"
 238         depends on SPARC64 && PROC_FS
 239         default y
 240         help
 241           This kernel feature is useful for number crunching applications
 242           that may need to compute untrusted bytecode during their
 243           execution. By using pipes or other transports made available to
 244           the process as file descriptors supporting the read/write
 245           syscalls, it's possible to isolate those applications in
 246           their own address space using seccomp. Once seccomp is
 247           enabled via /proc/<pid>/seccomp, it cannot be disabled
 248           and the task is only allowed to execute a few safe syscalls
 249           defined by each seccomp mode.
 250
 251           If unsure, say Y. Only embedded should say N here.
 252
 253 config HOTPLUG_CPU
 254         bool "Support for hot-pluggable CPUs"
 255         depends on SPARC64 && SMP
 256         select HOTPLUG
 257         help
 258           Say Y here to experiment with turning CPUs off and on.  CPUs
 259           can be controlled through /sys/devices/system/cpu/cpu#.
 260           Say N if you want to disable CPU hotplug.
 261
 262 config GENERIC_HARDIRQS
 263         bool
 264         default y if SPARC64
 265
 266 source "kernel/time/Kconfig"
 267
 268 if SPARC64
 269 source "drivers/cpufreq/Kconfig"
 270
 271 config US3_FREQ
 272         tristate "UltraSPARC-III CPU Frequency driver"
 273         depends on CPU_FREQ
 274         select CPU_FREQ_TABLE
 275         help
 276           This adds the CPUFreq driver for UltraSPARC-III processors.
 277
 278           For details, take a look at <file:Documentation/cpu-freq>.
 279
 280           If in doubt, say N.
 281
 282 config US2E_FREQ
 283         tristate "UltraSPARC-IIe CPU Frequency driver"
 284         depends on CPU_FREQ
 285         select CPU_FREQ_TABLE
 286         help
 287           This adds the CPUFreq driver for UltraSPARC-IIe processors.
 288
 289           For details, take a look at <file:Documentation/cpu-freq>.
 290
 291           If in doubt, say N.
 292
 293 endif
 294
 295 config US3_MC
 296         tristate "UltraSPARC-III Memory Controller driver"
 297         depends on SPARC64
 298         default y
 299         help
 300           This adds a driver for the UltraSPARC-III memory controller.
 301           Loading this driver allows exact mnemonic strings to be
 302           printed in the event of a memory error, so that the faulty DIMM
 303           on the motherboard can be matched to the error.
 304
 305           If in doubt, say Y, as this information can be very useful.
 306
 307 # Global things across all Sun machines.
 308 config GENERIC_LOCKBREAK
 309         bool
 310         default y
 311         depends on SPARC64 && SMP && PREEMPT
 312
 313 choice
 314         prompt "SPARC64 Huge TLB Page Size"
 315         depends on SPARC64 && HUGETLB_PAGE
 316         default HUGETLB_PAGE_SIZE_4MB
 317
 318 config HUGETLB_PAGE_SIZE_4MB
 319         bool "4MB"
 320
 321 config HUGETLB_PAGE_SIZE_512K
 322         bool "512K"
 323
 324 config HUGETLB_PAGE_SIZE_64K
 325         depends on !SPARC64_PAGE_SIZE_64KB
 326         bool "64K"
 327
 328 endchoice
 329
 330 config NUMA
 331         bool "NUMA support"
 332         depends on SPARC64 && SMP
 333
 334 config NODES_SHIFT
 335         int
 336         default "4"
 337         depends on NEED_MULTIPLE_NODES
 338
 339 # Some NUMA nodes have memory ranges that span
 340 # other nodes.  Even though a pfn is valid and
 341 # between a node's start and end pfns, it may not
 342 # reside on that node.  See memmap_init_zone()
 343 # for details.
 344 config NODES_SPAN_OTHER_NODES
 345         def_bool y
 346         depends on NEED_MULTIPLE_NODES
 347
 348 config ARCH_POPULATES_NODE_MAP
 349         def_bool y if SPARC64
 350
 351 config ARCH_SELECT_MEMORY_MODEL
 352         def_bool y if SPARC64
 353
 354 config ARCH_SPARSEMEM_ENABLE
 355         def_bool y if SPARC64
 356         select SPARSEMEM_VMEMMAP_ENABLE
 357
 358 config ARCH_SPARSEMEM_DEFAULT
 359         def_bool y if SPARC64
 360
 361 source "mm/Kconfig"
 362
 363 config SCHED_SMT
 364         bool "SMT (Hyperthreading) scheduler support"
 365         depends on SPARC64 && SMP
 366         default y
 367         help
 368           SMT scheduler support improves the CPU scheduler's decision making
 369           when dealing with SPARC cpus at a cost of slightly increased overhead
 370           in some places. If unsure say N here.
 371
 372 config SCHED_MC
 373         bool "Multi-core scheduler support"
 374         depends on SPARC64 && SMP
 375         default y
 376         help
 377           Multi-core scheduler support improves the CPU scheduler's decision
 378           making when dealing with multi-core CPU chips at a cost of slightly
 379           increased overhead in some places. If unsure say N here.
 380
 381 if SPARC64
 382 source "kernel/Kconfig.preempt"
 383 endif
 384
 385 config CMDLINE_BOOL
 386         bool "Default bootloader kernel arguments"
 387         depends on SPARC64
 388
 389 config CMDLINE
 390         string "Initial kernel command string"
 391         depends on CMDLINE_BOOL
 392         default "console=ttyS0,9600 root=/dev/sda1"
 393         help
 394           Say Y here if you want to be able to pass default arguments to
 395           the kernel. This will be overridden by the bootloader, if you
 396           use one (such as SILO). This is most useful if you want to boot
 397           a kernel from TFTP, and want default options to be available
 398           with having them passed on the command line.
 399
 400           NOTE: This option WILL override the PROM bootargs setting!
 401
 402 config SUN_PM
 403         bool
 404         default y if SPARC32
 405         help
 406           Enable power management and CPU standby features on supported
 407           SPARC platforms.
 408
 409 config SPARC_LED
 410         tristate "Sun4m LED driver"
 411         depends on SPARC32
 412         help
 413           This driver toggles the front-panel LED on sun4m systems
 414           in a user-specifiable manner.  Its state can be probed
 415           by reading /proc/led and its blinking mode can be changed
 416           via writes to /proc/led
 417
 418 config SERIAL_CONSOLE
 419         bool
 420         depends on SPARC32
 421         default y
 422         ---help---
 423           If you say Y here, it will be possible to use a serial port as the
 424           system console (the system console is the device which receives all
 425           kernel messages and warnings and which allows logins in single user
 426           mode). This could be useful if some terminal or printer is connected
 427           to that serial port.
 428
 429           Even if you say Y here, the currently visible virtual console
 430           (/dev/tty0) will still be used as the system console by default, but
 431           you can alter that using a kernel command line option such as
 432           "console=ttyS1". (Try "man bootparam" or see the documentation of
 433           your boot loader (silo) about how to pass options to the kernel at
 434           boot time.)
 435
 436           If you don't have a graphics card installed and you say Y here, the
 437           kernel will automatically use the first serial line, /dev/ttyS0, as
 438           system console.
 439
 440           If unsure, say N.
 441
 442 endmenu
 443
 444 menu "Bus options (PCI etc.)"
 445 config ISA
 446         bool
 447         help
 448           ISA is found on Espresso only and is not supported currently.
 449
 450 config ISAPNP
 451         bool
 452         help
 453           ISAPNP is not supported
 454
 455 config EISA
 456         bool
 457         help
 458           EISA is not supported.
 459
 460 config MCA
 461         bool
 462         help
 463           MCA is not supported.
 464
 465 config SBUS
 466         bool
 467         default y
 468
 469 config SBUSCHAR
 470         bool
 471         default y
 472
 473 config SUN_LDOMS
 474         bool "Sun Logical Domains support"
 475         depends on SPARC64
 476         help
 477           Say Y here is you want to support virtual devices via
 478           Logical Domains.
 479
 480 config PCI
 481         bool "Support for PCI and PS/2 keyboard/mouse"
 482         help
 483           Find out whether your system includes a PCI bus. PCI is the name of
 484           a bus system, i.e. the way the CPU talks to the other stuff inside
 485           your box.  If you say Y here, the kernel will include drivers and
 486           infrastructure code to support PCI bus devices.
 487
 488           CONFIG_PCI is needed for all JavaStation's (including MrCoffee),
 489           CP-1200, JavaEngine-1, Corona, Red October, and Serengeti SGSC.
 490           All of these platforms are extremely obscure, so say N if unsure.
 491
 492 config PCI_DOMAINS
 493         def_bool PCI if SPARC64
 494
 495 config PCI_SYSCALL
 496         def_bool PCI
 497
 498 source "drivers/pci/Kconfig"
 499
 500 source "drivers/pcmcia/Kconfig"
 501
 502 config SUN_OPENPROMFS
 503         tristate "Openprom tree appears in /proc/openprom"
 504         help
 505           If you say Y, the OpenPROM device tree will be available as a
 506           virtual file system, which you can mount to /proc/openprom by "mount
 507           -t openpromfs none /proc/openprom".
 508
 509           To compile the /proc/openprom support as a module, choose M here: the
 510           module will be called openpromfs.
 511
 512           Only choose N if you know in advance that you will not need to modify
 513           OpenPROM settings on the running system.
 514
 515 # Makefile helpers
 516 config SPARC32_PCI
 517         bool
 518         default y
 519         depends on SPARC32 && PCI
 520
 521 config SPARC64_PCI
 522         bool
 523         default y
 524         depends on SPARC64 && PCI
 525
 526 endmenu
 527
 528 menu "Executable file formats"
 529
 530 source "fs/Kconfig.binfmt"
 531
 532 config COMPAT
 533         bool
 534         depends on SPARC64
 535         default y
 536         select COMPAT_BINFMT_ELF
 537
 538 config SYSVIPC_COMPAT
 539         bool
 540         depends on COMPAT && SYSVIPC
 541         default y
 542
 543 endmenu
 544
 545 source "net/Kconfig"
 546
 547 source "drivers/Kconfig"
 548
 549 source "drivers/sbus/char/Kconfig"
 550
 551 source "fs/Kconfig"
 552
 553 source "arch/sparc/Kconfig.debug"
 554
 555 source "security/Kconfig"
 556
 557 source "crypto/Kconfig"
 558
 559 source "lib/Kconfig"