arch/sh/Kconfig

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