arch/sh/Kconfig

   1 config SUPERH
   2         def_bool y
   3         select ARCH_MIGHT_HAVE_PC_PARPORT
   4         select EXPERT
   5         select CLKDEV_LOOKUP
   6         select HAVE_IDE if HAS_IOPORT
   7         select HAVE_MEMBLOCK
   8         select HAVE_MEMBLOCK_NODE_MAP
   9         select ARCH_DISCARD_MEMBLOCK
  10         select HAVE_OPROFILE
  11         select HAVE_GENERIC_DMA_COHERENT
  12         select HAVE_ARCH_TRACEHOOK
  13         select HAVE_DMA_API_DEBUG
  14         select HAVE_DMA_ATTRS
  15         select HAVE_PERF_EVENTS
  16         select HAVE_DEBUG_BUGVERBOSE
  17         select ARCH_HAVE_CUSTOM_GPIO_H
  18         select ARCH_HAVE_NMI_SAFE_CMPXCHG if (GUSA_RB || CPU_SH4A)
  19         select PERF_USE_VMALLOC
  20         select HAVE_DEBUG_KMEMLEAK
  21         select HAVE_KERNEL_GZIP
  22         select HAVE_KERNEL_BZIP2
  23         select HAVE_KERNEL_LZMA
  24         select HAVE_KERNEL_XZ
  25         select HAVE_KERNEL_LZO
  26         select HAVE_UID16
  27         select ARCH_WANT_IPC_PARSE_VERSION
  28         select HAVE_SYSCALL_TRACEPOINTS
  29         select HAVE_REGS_AND_STACK_ACCESS_API
  30         select MAY_HAVE_SPARSE_IRQ
  31         select IRQ_FORCED_THREADING
  32         select RTC_LIB
  33         select GENERIC_ATOMIC64
  34         select GENERIC_IRQ_SHOW
  35         select GENERIC_SMP_IDLE_THREAD
  36         select GENERIC_IDLE_POLL_SETUP
  37         select GENERIC_CLOCKEVENTS
  38         select GENERIC_CMOS_UPDATE if SH_SH03 || SH_DREAMCAST
  39         select GENERIC_STRNCPY_FROM_USER
  40         select GENERIC_STRNLEN_USER
  41         select HAVE_MOD_ARCH_SPECIFIC if DWARF_UNWINDER
  42         select MODULES_USE_ELF_RELA
  43         select OLD_SIGSUSPEND
  44         select OLD_SIGACTION
  45         help
  46           The SuperH is a RISC processor targeted for use in embedded systems
  47           and consumer electronics; it was also used in the Sega Dreamcast
  48           gaming console.  The SuperH port has a home page at
  49           <http://www.linux-sh.org/>.
  50
  51 config SUPERH32
  52         def_bool ARCH = "sh"
  53         select HAVE_KPROBES
  54         select HAVE_KRETPROBES
  55         select HAVE_IOREMAP_PROT if MMU && !X2TLB
  56         select HAVE_FUNCTION_TRACER
  57         select HAVE_FTRACE_MCOUNT_RECORD
  58         select HAVE_DYNAMIC_FTRACE
  59         select HAVE_FUNCTION_TRACE_MCOUNT_TEST
  60         select HAVE_FTRACE_NMI_ENTER if DYNAMIC_FTRACE
  61         select ARCH_WANT_IPC_PARSE_VERSION
  62         select HAVE_FUNCTION_GRAPH_TRACER
  63         select HAVE_ARCH_KGDB
  64         select HAVE_HW_BREAKPOINT
  65         select HAVE_MIXED_BREAKPOINTS_REGS
  66         select PERF_EVENTS
  67         select ARCH_HIBERNATION_POSSIBLE if MMU
  68         select SPARSE_IRQ
  69         select HAVE_CC_STACKPROTECTOR
  70
  71 config SUPERH64
  72         def_bool ARCH = "sh64"
  73         select KALLSYMS
  74
  75 config ARCH_DEFCONFIG
  76         string
  77         default "arch/sh/configs/shx3_defconfig" if SUPERH32
  78         default "arch/sh/configs/cayman_defconfig" if SUPERH64
  79
  80 config RWSEM_GENERIC_SPINLOCK
  81         def_bool y
  82
  83 config RWSEM_XCHGADD_ALGORITHM
  84         bool
  85
  86 config GENERIC_BUG
  87         def_bool y
  88         depends on BUG && SUPERH32
  89
  90 config GENERIC_CSUM
  91         def_bool y
  92         depends on SUPERH64
  93
  94 config GENERIC_HWEIGHT
  95         def_bool y
  96
  97 config GENERIC_CALIBRATE_DELAY
  98         bool
  99
 100 config GENERIC_LOCKBREAK
 101         def_bool y
 102         depends on SMP && PREEMPT
 103
 104 config ARCH_SUSPEND_POSSIBLE
 105         def_bool n
 106
 107 config ARCH_HIBERNATION_POSSIBLE
 108         def_bool n
 109
 110 config SYS_SUPPORTS_APM_EMULATION
 111         bool
 112         select ARCH_SUSPEND_POSSIBLE
 113
 114 config SYS_SUPPORTS_HUGETLBFS
 115         bool
 116
 117 config SYS_SUPPORTS_SMP
 118         bool
 119
 120 config SYS_SUPPORTS_NUMA
 121         bool
 122
 123 config SYS_SUPPORTS_PCI
 124         bool
 125
 126 config STACKTRACE_SUPPORT
 127         def_bool y
 128
 129 config LOCKDEP_SUPPORT
 130         def_bool y
 131
 132 config HAVE_LATENCYTOP_SUPPORT
 133         def_bool y
 134
 135 config ARCH_HAS_ILOG2_U32
 136         def_bool n
 137
 138 config ARCH_HAS_ILOG2_U64
 139         def_bool n
 140
 141 config NO_IOPORT
 142         def_bool !PCI
 143         depends on !SH_CAYMAN && !SH_SH4202_MICRODEV && !SH_SHMIN && \
 144                    !SH_HP6XX && !SH_SOLUTION_ENGINE
 145
 146 config IO_TRAPPED
 147         bool
 148
 149 config SWAP_IO_SPACE
 150         bool
 151
 152 config DMA_COHERENT
 153         bool
 154
 155 config DMA_NONCOHERENT
 156         def_bool !DMA_COHERENT
 157
 158 config NEED_DMA_MAP_STATE
 159         def_bool DMA_NONCOHERENT
 160
 161 config NEED_SG_DMA_LENGTH
 162         def_bool y
 163
 164 source "init/Kconfig"
 165
 166 source "kernel/Kconfig.freezer"
 167
 168 menu "System type"
 169
 170 #
 171 # Processor families
 172 #
 173 config CPU_SH2
 174         bool
 175
 176 config CPU_SH2A
 177         bool
 178         select CPU_SH2
 179         select UNCACHED_MAPPING
 180
 181 config CPU_SH3
 182         bool
 183         select CPU_HAS_INTEVT
 184         select CPU_HAS_SR_RB
 185         select SYS_SUPPORTS_SH_TMU
 186
 187 config CPU_SH4
 188         bool
 189         select CPU_HAS_INTEVT
 190         select CPU_HAS_SR_RB
 191         select CPU_HAS_FPU if !CPU_SH4AL_DSP
 192         select SYS_SUPPORTS_SH_TMU
 193         select SYS_SUPPORTS_HUGETLBFS if MMU
 194
 195 config CPU_SH4A
 196         bool
 197         select CPU_SH4
 198
 199 config CPU_SH4AL_DSP
 200         bool
 201         select CPU_SH4A
 202         select CPU_HAS_DSP
 203
 204 config CPU_SH5
 205         bool
 206         select CPU_HAS_FPU
 207         select SYS_SUPPORTS_SH_TMU
 208         select SYS_SUPPORTS_HUGETLBFS if MMU
 209
 210 config CPU_SHX2
 211         bool
 212
 213 config CPU_SHX3
 214         bool
 215         select DMA_COHERENT
 216         select SYS_SUPPORTS_SMP
 217         select SYS_SUPPORTS_NUMA
 218
 219 config ARCH_SHMOBILE
 220         bool
 221         select ARCH_SUSPEND_POSSIBLE
 222         select PM
 223         select PM_RUNTIME
 224
 225 config CPU_HAS_PMU
 226        depends on CPU_SH4 || CPU_SH4A
 227        default y
 228        bool
 229
 230 if SUPERH32
 231
 232 choice
 233         prompt "Processor sub-type selection"
 234
 235 #
 236 # Processor subtypes
 237 #
 238
 239 # SH-2 Processor Support
 240
 241 config CPU_SUBTYPE_SH7619
 242         bool "Support SH7619 processor"
 243         select CPU_SH2
 244         select SYS_SUPPORTS_SH_CMT
 245
 246 # SH-2A Processor Support
 247
 248 config CPU_SUBTYPE_SH7201
 249         bool "Support SH7201 processor"
 250         select CPU_SH2A
 251         select CPU_HAS_FPU
 252         select SYS_SUPPORTS_SH_MTU2
 253
 254 config CPU_SUBTYPE_SH7203
 255         bool "Support SH7203 processor"
 256         select CPU_SH2A
 257         select CPU_HAS_FPU
 258         select SYS_SUPPORTS_SH_CMT
 259         select SYS_SUPPORTS_SH_MTU2
 260         select ARCH_WANT_OPTIONAL_GPIOLIB
 261         select PINCTRL
 262
 263 config CPU_SUBTYPE_SH7206
 264         bool "Support SH7206 processor"
 265         select CPU_SH2A
 266         select SYS_SUPPORTS_SH_CMT
 267         select SYS_SUPPORTS_SH_MTU2
 268
 269 config CPU_SUBTYPE_SH7263
 270         bool "Support SH7263 processor"
 271         select CPU_SH2A
 272         select CPU_HAS_FPU
 273         select SYS_SUPPORTS_SH_CMT
 274         select SYS_SUPPORTS_SH_MTU2
 275
 276 config CPU_SUBTYPE_SH7264
 277         bool "Support SH7264 processor"
 278         select CPU_SH2A
 279         select CPU_HAS_FPU
 280         select SYS_SUPPORTS_SH_CMT
 281         select SYS_SUPPORTS_SH_MTU2
 282         select PINCTRL
 283
 284 config CPU_SUBTYPE_SH7269
 285         bool "Support SH7269 processor"
 286         select CPU_SH2A
 287         select CPU_HAS_FPU
 288         select SYS_SUPPORTS_SH_CMT
 289         select SYS_SUPPORTS_SH_MTU2
 290         select PINCTRL
 291
 292 config CPU_SUBTYPE_MXG
 293         bool "Support MX-G processor"
 294         select CPU_SH2A
 295         select SYS_SUPPORTS_SH_MTU2
 296         help
 297           Select MX-G if running on an R8A03022BG part.
 298
 299 # SH-3 Processor Support
 300
 301 config CPU_SUBTYPE_SH7705
 302         bool "Support SH7705 processor"
 303         select CPU_SH3
 304
 305 config CPU_SUBTYPE_SH7706
 306         bool "Support SH7706 processor"
 307         select CPU_SH3
 308         help
 309           Select SH7706 if you have a 133 Mhz SH-3 HD6417706 CPU.
 310
 311 config CPU_SUBTYPE_SH7707
 312         bool "Support SH7707 processor"
 313         select CPU_SH3
 314         help
 315           Select SH7707 if you have a  60 Mhz SH-3 HD6417707 CPU.
 316
 317 config CPU_SUBTYPE_SH7708
 318         bool "Support SH7708 processor"
 319         select CPU_SH3
 320         help
 321           Select SH7708 if you have a  60 Mhz SH-3 HD6417708S or
 322           if you have a 100 Mhz SH-3 HD6417708R CPU.
 323
 324 config CPU_SUBTYPE_SH7709
 325         bool "Support SH7709 processor"
 326         select CPU_SH3
 327         help
 328           Select SH7709 if you have a  80 Mhz SH-3 HD6417709 CPU.
 329
 330 config CPU_SUBTYPE_SH7710
 331         bool "Support SH7710 processor"
 332         select CPU_SH3
 333         select CPU_HAS_DSP
 334         help
 335           Select SH7710 if you have a SH3-DSP SH7710 CPU.
 336
 337 config CPU_SUBTYPE_SH7712
 338         bool "Support SH7712 processor"
 339         select CPU_SH3
 340         select CPU_HAS_DSP
 341         help
 342           Select SH7712 if you have a SH3-DSP SH7712 CPU.
 343
 344 config CPU_SUBTYPE_SH7720
 345         bool "Support SH7720 processor"
 346         select CPU_SH3
 347         select CPU_HAS_DSP
 348         select SYS_SUPPORTS_SH_CMT
 349         select ARCH_WANT_OPTIONAL_GPIOLIB
 350         select USB_OHCI_SH if USB_OHCI_HCD
 351         select PINCTRL
 352         help
 353           Select SH7720 if you have a SH3-DSP SH7720 CPU.
 354
 355 config CPU_SUBTYPE_SH7721
 356         bool "Support SH7721 processor"
 357         select CPU_SH3
 358         select CPU_HAS_DSP
 359         select SYS_SUPPORTS_SH_CMT
 360         select USB_OHCI_SH if USB_OHCI_HCD
 361         help
 362           Select SH7721 if you have a SH3-DSP SH7721 CPU.
 363
 364 # SH-4 Processor Support
 365
 366 config CPU_SUBTYPE_SH7750
 367         bool "Support SH7750 processor"
 368         select CPU_SH4
 369         help
 370           Select SH7750 if you have a 200 Mhz SH-4 HD6417750 CPU.
 371
 372 config CPU_SUBTYPE_SH7091
 373         bool "Support SH7091 processor"
 374         select CPU_SH4
 375         help
 376           Select SH7091 if you have an SH-4 based Sega device (such as
 377           the Dreamcast, Naomi, and Naomi 2).
 378
 379 config CPU_SUBTYPE_SH7750R
 380         bool "Support SH7750R processor"
 381         select CPU_SH4
 382
 383 config CPU_SUBTYPE_SH7750S
 384         bool "Support SH7750S processor"
 385         select CPU_SH4
 386
 387 config CPU_SUBTYPE_SH7751
 388         bool "Support SH7751 processor"
 389         select CPU_SH4
 390         help
 391           Select SH7751 if you have a 166 Mhz SH-4 HD6417751 CPU,
 392           or if you have a HD6417751R CPU.
 393
 394 config CPU_SUBTYPE_SH7751R
 395         bool "Support SH7751R processor"
 396         select CPU_SH4
 397
 398 config CPU_SUBTYPE_SH7760
 399         bool "Support SH7760 processor"
 400         select CPU_SH4
 401
 402 config CPU_SUBTYPE_SH4_202
 403         bool "Support SH4-202 processor"
 404         select CPU_SH4
 405
 406 # SH-4A Processor Support
 407
 408 config CPU_SUBTYPE_SH7723
 409         bool "Support SH7723 processor"
 410         select CPU_SH4A
 411         select CPU_SHX2
 412         select ARCH_SHMOBILE
 413         select ARCH_SPARSEMEM_ENABLE
 414         select SYS_SUPPORTS_SH_CMT
 415         select ARCH_WANT_OPTIONAL_GPIOLIB
 416         select PINCTRL
 417         help
 418           Select SH7723 if you have an SH-MobileR2 CPU.
 419
 420 config CPU_SUBTYPE_SH7724
 421         bool "Support SH7724 processor"
 422         select CPU_SH4A
 423         select CPU_SHX2
 424         select ARCH_SHMOBILE
 425         select ARCH_SPARSEMEM_ENABLE
 426         select SYS_SUPPORTS_SH_CMT
 427         select ARCH_WANT_OPTIONAL_GPIOLIB
 428         select PINCTRL
 429         help
 430           Select SH7724 if you have an SH-MobileR2R CPU.
 431
 432 config CPU_SUBTYPE_SH7734
 433         bool "Support SH7734 processor"
 434         select CPU_SH4A
 435         select CPU_SHX2
 436         select ARCH_WANT_OPTIONAL_GPIOLIB
 437         select PINCTRL
 438         help
 439           Select SH7734 if you have a SH4A SH7734 CPU.
 440
 441 config CPU_SUBTYPE_SH7757
 442         bool "Support SH7757 processor"
 443         select CPU_SH4A
 444         select CPU_SHX2
 445         select ARCH_WANT_OPTIONAL_GPIOLIB
 446         select PINCTRL
 447         help
 448           Select SH7757 if you have a SH4A SH7757 CPU.
 449
 450 config CPU_SUBTYPE_SH7763
 451         bool "Support SH7763 processor"
 452         select CPU_SH4A
 453         select USB_OHCI_SH if USB_OHCI_HCD
 454         help
 455           Select SH7763 if you have a SH4A SH7763(R5S77631) CPU.
 456
 457 config CPU_SUBTYPE_SH7770
 458         bool "Support SH7770 processor"
 459         select CPU_SH4A
 460
 461 config CPU_SUBTYPE_SH7780
 462         bool "Support SH7780 processor"
 463         select CPU_SH4A
 464
 465 config CPU_SUBTYPE_SH7785
 466         bool "Support SH7785 processor"
 467         select CPU_SH4A
 468         select CPU_SHX2
 469         select ARCH_SPARSEMEM_ENABLE
 470         select SYS_SUPPORTS_NUMA
 471         select ARCH_WANT_OPTIONAL_GPIOLIB
 472         select PINCTRL
 473
 474 config CPU_SUBTYPE_SH7786
 475         bool "Support SH7786 processor"
 476         select CPU_SH4A
 477         select CPU_SHX3
 478         select CPU_HAS_PTEAEX
 479         select GENERIC_CLOCKEVENTS_BROADCAST if SMP
 480         select ARCH_WANT_OPTIONAL_GPIOLIB
 481         select USB_OHCI_SH if USB_OHCI_HCD
 482         select USB_EHCI_SH if USB_EHCI_HCD
 483         select PINCTRL
 484
 485 config CPU_SUBTYPE_SHX3
 486         bool "Support SH-X3 processor"
 487         select CPU_SH4A
 488         select CPU_SHX3
 489         select GENERIC_CLOCKEVENTS_BROADCAST if SMP
 490         select ARCH_REQUIRE_GPIOLIB
 491         select PINCTRL
 492
 493 # SH4AL-DSP Processor Support
 494
 495 config CPU_SUBTYPE_SH7343
 496         bool "Support SH7343 processor"
 497         select CPU_SH4AL_DSP
 498         select ARCH_SHMOBILE
 499         select SYS_SUPPORTS_SH_CMT
 500
 501 config CPU_SUBTYPE_SH7722
 502         bool "Support SH7722 processor"
 503         select CPU_SH4AL_DSP
 504         select CPU_SHX2
 505         select ARCH_SHMOBILE
 506         select ARCH_SPARSEMEM_ENABLE
 507         select SYS_SUPPORTS_NUMA
 508         select SYS_SUPPORTS_SH_CMT
 509         select ARCH_WANT_OPTIONAL_GPIOLIB
 510         select PINCTRL
 511
 512 config CPU_SUBTYPE_SH7366
 513         bool "Support SH7366 processor"
 514         select CPU_SH4AL_DSP
 515         select CPU_SHX2
 516         select ARCH_SHMOBILE
 517         select ARCH_SPARSEMEM_ENABLE
 518         select SYS_SUPPORTS_NUMA
 519         select SYS_SUPPORTS_SH_CMT
 520
 521 endchoice
 522
 523 endif
 524
 525 if SUPERH64
 526
 527 choice
 528         prompt "Processor sub-type selection"
 529
 530 # SH-5 Processor Support
 531
 532 config CPU_SUBTYPE_SH5_101
 533         bool "Support SH5-101 processor"
 534         select CPU_SH5
 535
 536 config CPU_SUBTYPE_SH5_103
 537         bool "Support SH5-103 processor"
 538         select CPU_SH5
 539
 540 endchoice
 541
 542 endif
 543
 544 source "arch/sh/mm/Kconfig"
 545
 546 source "arch/sh/Kconfig.cpu"
 547
 548 source "arch/sh/boards/Kconfig"
 549
 550 menu "Timer and clock configuration"
 551
 552 config SH_PCLK_FREQ
 553         int "Peripheral clock frequency (in Hz)"
 554         depends on SH_CLK_CPG_LEGACY
 555         default "31250000" if CPU_SUBTYPE_SH7619
 556         default "33333333" if CPU_SUBTYPE_SH7770 || \
 557                               CPU_SUBTYPE_SH7760 || \
 558                               CPU_SUBTYPE_SH7705 || \
 559                               CPU_SUBTYPE_SH7203 || \
 560                               CPU_SUBTYPE_SH7206 || \
 561                               CPU_SUBTYPE_SH7263 || \
 562                               CPU_SUBTYPE_MXG
 563         default "60000000" if CPU_SUBTYPE_SH7751 || CPU_SUBTYPE_SH7751R
 564         default "66000000" if CPU_SUBTYPE_SH4_202
 565         default "50000000"
 566         help
 567           This option is used to specify the peripheral clock frequency.
 568           This is necessary for determining the reference clock value on
 569           platforms lacking an RTC.
 570
 571 config SH_CLK_CPG
 572         def_bool y
 573
 574 config SH_CLK_CPG_LEGACY
 575         depends on SH_CLK_CPG
 576         def_bool y if !CPU_SUBTYPE_SH7785 && !ARCH_SHMOBILE && \
 577                       !CPU_SHX3 && !CPU_SUBTYPE_SH7757 && \
 578                       !CPU_SUBTYPE_SH7734 && !CPU_SUBTYPE_SH7264 && \
 579                       !CPU_SUBTYPE_SH7269
 580
 581 endmenu
 582
 583 menu "CPU Frequency scaling"
 584 source "drivers/cpufreq/Kconfig"
 585 endmenu
 586
 587 source "arch/sh/drivers/Kconfig"
 588
 589 endmenu
 590
 591 menu "Kernel features"
 592
 593 source kernel/Kconfig.hz
 594
 595 config KEXEC
 596         bool "kexec system call (EXPERIMENTAL)"
 597         depends on SUPERH32 && MMU
 598         help
 599           kexec is a system call that implements the ability to shutdown your
 600           current kernel, and to start another kernel.  It is like a reboot
 601           but it is independent of the system firmware.  And like a reboot
 602           you can start any kernel with it, not just Linux.
 603
 604           The name comes from the similarity to the exec system call.
 605
 606           It is an ongoing process to be certain the hardware in a machine
 607           is properly shutdown, so do not be surprised if this code does not
 608           initially work for you.  As of this writing the exact hardware
 609           interface is strongly in flux, so no good recommendation can be
 610           made.
 611
 612 config CRASH_DUMP
 613         bool "kernel crash dumps (EXPERIMENTAL)"
 614         depends on SUPERH32 && BROKEN_ON_SMP
 615         help
 616           Generate crash dump after being started by kexec.
 617           This should be normally only set in special crash dump kernels
 618           which are loaded in the main kernel with kexec-tools into
 619           a specially reserved region and then later executed after
 620           a crash by kdump/kexec. The crash dump kernel must be compiled
 621           to a memory address not used by the main kernel using
 622           PHYSICAL_START.
 623
 624           For more details see Documentation/kdump/kdump.txt
 625
 626 config KEXEC_JUMP
 627         bool "kexec jump (EXPERIMENTAL)"
 628         depends on SUPERH32 && KEXEC && HIBERNATION
 629         help
 630           Jump between original kernel and kexeced kernel and invoke
 631           code via KEXEC
 632
 633 config PHYSICAL_START
 634         hex "Physical address where the kernel is loaded" if (EXPERT || CRASH_DUMP)
 635         default MEMORY_START
 636         ---help---
 637           This gives the physical address where the kernel is loaded
 638           and is ordinarily the same as MEMORY_START.
 639
 640           Different values are primarily used in the case of kexec on panic
 641           where the fail safe kernel needs to run at a different address
 642           than the panic-ed kernel.
 643
 644 config SECCOMP
 645         bool "Enable seccomp to safely compute untrusted bytecode"
 646         depends on PROC_FS
 647         help
 648           This kernel feature is useful for number crunching applications
 649           that may need to compute untrusted bytecode during their
 650           execution. By using pipes or other transports made available to
 651           the process as file descriptors supporting the read/write
 652           syscalls, it's possible to isolate those applications in
 653           their own address space using seccomp. Once seccomp is
 654           enabled via prctl, it cannot be disabled and the task is only
 655           allowed to execute a few safe syscalls defined by each seccomp
 656           mode.
 657
 658           If unsure, say N.
 659
 660 config SMP
 661         bool "Symmetric multi-processing support"
 662         depends on SYS_SUPPORTS_SMP
 663         ---help---
 664           This enables support for systems with more than one CPU. If you have
 665           a system with only one CPU, say N. If you have a system with more
 666           than one CPU, say Y.
 667
 668           If you say N here, the kernel will run on uni- and multiprocessor
 669           machines, but will use only one CPU of a multiprocessor machine. If
 670           you say Y here, the kernel will run on many, but not all,
 671           uniprocessor machines. On a uniprocessor machine, the kernel
 672           will run faster if you say N here.
 673
 674           People using multiprocessor machines who say Y here should also say
 675           Y to "Enhanced Real Time Clock Support", below.
 676
 677           See also <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO
 678           available at <http://www.tldp.org/docs.html#howto>.
 679
 680           If you don't know what to do here, say N.
 681
 682 config NR_CPUS
 683         int "Maximum number of CPUs (2-32)"
 684         range 2 32
 685         depends on SMP
 686         default "4" if CPU_SUBTYPE_SHX3
 687         default "2"
 688         help
 689           This allows you to specify the maximum number of CPUs which this
 690           kernel will support.  The maximum supported value is 32 and the
 691           minimum value which makes sense is 2.
 692
 693           This is purely to save memory - each supported CPU adds
 694           approximately eight kilobytes to the kernel image.
 695
 696 config HOTPLUG_CPU
 697         bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
 698         depends on SMP
 699         help
 700           Say Y here to experiment with turning CPUs off and on.  CPUs
 701           can be controlled through /sys/devices/system/cpu.
 702
 703 source "kernel/Kconfig.preempt"
 704
 705 config GUSA
 706         def_bool y
 707         depends on !SMP && SUPERH32
 708         help
 709           This enables support for gUSA (general UserSpace Atomicity).
 710           This is the default implementation for both UP and non-ll/sc
 711           CPUs, and is used by the libc, amongst others.
 712
 713           For additional information, design information can be found
 714           in <http://lc.linux.or.jp/lc2002/papers/niibe0919p.pdf>.
 715
 716           This should only be disabled for special cases where alternate
 717           atomicity implementations exist.
 718
 719 config GUSA_RB
 720         bool "Implement atomic operations by roll-back (gRB) (EXPERIMENTAL)"
 721         depends on GUSA && CPU_SH3 || (CPU_SH4 && !CPU_SH4A)
 722         help
 723           Enabling this option will allow the kernel to implement some
 724           atomic operations using a software implementation of load-locked/
 725           store-conditional (LLSC). On machines which do not have hardware
 726           LLSC, this should be more efficient than the other alternative of
 727           disabling interrupts around the atomic sequence.
 728
 729 config HW_PERF_EVENTS
 730         bool "Enable hardware performance counter support for perf events"
 731         depends on PERF_EVENTS && CPU_HAS_PMU
 732         default y
 733         help
 734           Enable hardware performance counter support for perf events. If
 735           disabled, perf events will use software events only.
 736
 737 source "drivers/sh/Kconfig"
 738
 739 endmenu
 740
 741 menu "Boot options"
 742
 743 config ZERO_PAGE_OFFSET
 744         hex
 745         default "0x00010000" if PAGE_SIZE_64KB || SH_RTS7751R2D || \
 746                                 SH_7751_SOLUTION_ENGINE
 747         default "0x00004000" if PAGE_SIZE_16KB || SH_SH03
 748         default "0x00002000" if PAGE_SIZE_8KB
 749         default "0x00001000"
 750         help
 751           This sets the default offset of zero page.
 752
 753 config BOOT_LINK_OFFSET
 754         hex
 755         default "0x00210000" if SH_SHMIN
 756         default "0x00400000" if SH_CAYMAN
 757         default "0x00810000" if SH_7780_SOLUTION_ENGINE
 758         default "0x009e0000" if SH_TITAN
 759         default "0x01800000" if SH_SDK7780
 760         default "0x02000000" if SH_EDOSK7760
 761         default "0x00800000"
 762         help
 763           This option allows you to set the link address offset of the zImage.
 764           This can be useful if you are on a board which has a small amount of
 765           memory.
 766
 767 config ENTRY_OFFSET
 768         hex
 769         default "0x00001000" if PAGE_SIZE_4KB
 770         default "0x00002000" if PAGE_SIZE_8KB
 771         default "0x00004000" if PAGE_SIZE_16KB
 772         default "0x00010000" if PAGE_SIZE_64KB
 773         default "0x00000000"
 774
 775 config ROMIMAGE_MMCIF
 776         bool "Include MMCIF loader in romImage (EXPERIMENTAL)"
 777         depends on CPU_SUBTYPE_SH7724
 778         help
 779           Say Y here to include experimental MMCIF loading code in
 780           romImage. With this enabled it is possible to write the romImage
 781           kernel image to an MMC card and boot the kernel straight from
 782           the reset vector. At reset the processor Mask ROM will load the
 783           first part of the romImage which in turn loads the rest the kernel
 784           image to RAM using the MMCIF hardware block.
 785
 786 choice
 787         prompt "Kernel command line"
 788         optional
 789         default CMDLINE_OVERWRITE
 790         help
 791           Setting this option allows the kernel command line arguments
 792           to be set.
 793
 794 config CMDLINE_OVERWRITE
 795         bool "Overwrite bootloader kernel arguments"
 796         help
 797           Given string will overwrite any arguments passed in by
 798           a bootloader.
 799
 800 config CMDLINE_EXTEND
 801         bool "Extend bootloader kernel arguments"
 802         help
 803           Given string will be concatenated with arguments passed in
 804           by a bootloader.
 805
 806 endchoice
 807
 808 config CMDLINE
 809         string "Kernel command line arguments string"
 810         depends on CMDLINE_OVERWRITE || CMDLINE_EXTEND
 811         default "console=ttySC1,115200"
 812
 813 endmenu
 814
 815 menu "Bus options"
 816
 817 config SUPERHYWAY
 818         tristate "SuperHyway Bus support"
 819         depends on CPU_SUBTYPE_SH4_202
 820
 821 config MAPLE
 822         bool "Maple Bus support"
 823         depends on SH_DREAMCAST
 824         help
 825          The Maple Bus is SEGA's serial communication bus for peripherals
 826          on the Dreamcast. Without this bus support you won't be able to
 827          get your Dreamcast keyboard etc to work, so most users
 828          probably want to say 'Y' here, unless you are only using the
 829          Dreamcast with a serial line terminal or a remote network
 830          connection.
 831
 832 config PCI
 833         bool "PCI support"
 834         depends on SYS_SUPPORTS_PCI
 835         select PCI_DOMAINS
 836         select GENERIC_PCI_IOMAP
 837         select NO_GENERIC_PCI_IOPORT_MAP
 838         help
 839           Find out whether you have a PCI motherboard. PCI is the name of a
 840           bus system, i.e. the way the CPU talks to the other stuff inside
 841           your box. If you have PCI, say Y, otherwise N.
 842
 843 config PCI_DOMAINS
 844         bool
 845
 846 source "drivers/pci/pcie/Kconfig"
 847
 848 source "drivers/pci/Kconfig"
 849
 850 source "drivers/pcmcia/Kconfig"
 851
 852 source "drivers/pci/hotplug/Kconfig"
 853
 854 endmenu
 855
 856 menu "Executable file formats"
 857
 858 source "fs/Kconfig.binfmt"
 859
 860 endmenu
 861
 862 menu "Power management options (EXPERIMENTAL)"
 863
 864 source "kernel/power/Kconfig"
 865
 866 source "drivers/cpuidle/Kconfig"
 867
 868 endmenu
 869
 870 source "net/Kconfig"
 871
 872 source "drivers/Kconfig"
 873
 874 source "fs/Kconfig"
 875
 876 source "arch/sh/Kconfig.debug"
 877
 878 source "security/Kconfig"
 879
 880 source "crypto/Kconfig"
 881
 882 source "lib/Kconfig"