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