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