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