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