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