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_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_MAP
 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         select SH_INTC
 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 SH_INTC
 187         select SYS_SUPPORTS_SH_TMU
 188
 189 config CPU_SH4
 190         bool
 191         select CPU_HAS_INTEVT
 192         select CPU_HAS_SR_RB
 193         select CPU_HAS_FPU if !CPU_SH4AL_DSP
 194         select SH_INTC
 195         select SYS_SUPPORTS_SH_TMU
 196         select SYS_SUPPORTS_HUGETLBFS if MMU
 197
 198 config CPU_SH4A
 199         bool
 200         select CPU_SH4
 201
 202 config CPU_SH4AL_DSP
 203         bool
 204         select CPU_SH4A
 205         select CPU_HAS_DSP
 206
 207 config CPU_SH5
 208         bool
 209         select CPU_HAS_FPU
 210         select SYS_SUPPORTS_SH_TMU
 211         select SYS_SUPPORTS_HUGETLBFS if MMU
 212
 213 config CPU_SHX2
 214         bool
 215
 216 config CPU_SHX3
 217         bool
 218         select DMA_COHERENT
 219         select SYS_SUPPORTS_SMP
 220         select SYS_SUPPORTS_NUMA
 221
 222 config ARCH_SHMOBILE
 223         bool
 224         select ARCH_SUSPEND_POSSIBLE
 225         select PM
 226         select PM_RUNTIME
 227
 228 config CPU_HAS_PMU
 229        depends on CPU_SH4 || CPU_SH4A
 230        default y
 231        bool
 232
 233 if SUPERH32
 234
 235 choice
 236         prompt "Processor sub-type selection"
 237
 238 #
 239 # Processor subtypes
 240 #
 241
 242 # SH-2 Processor Support
 243
 244 config CPU_SUBTYPE_SH7619
 245         bool "Support SH7619 processor"
 246         select CPU_SH2
 247         select SYS_SUPPORTS_SH_CMT
 248
 249 # SH-2A Processor Support
 250
 251 config CPU_SUBTYPE_SH7201
 252         bool "Support SH7201 processor"
 253         select CPU_SH2A
 254         select CPU_HAS_FPU
 255         select SYS_SUPPORTS_SH_MTU2
 256
 257 config CPU_SUBTYPE_SH7203
 258         bool "Support SH7203 processor"
 259         select CPU_SH2A
 260         select CPU_HAS_FPU
 261         select SYS_SUPPORTS_SH_CMT
 262         select SYS_SUPPORTS_SH_MTU2
 263         select ARCH_WANT_OPTIONAL_GPIOLIB
 264         select PINCTRL
 265
 266 config CPU_SUBTYPE_SH7206
 267         bool "Support SH7206 processor"
 268         select CPU_SH2A
 269         select SYS_SUPPORTS_SH_CMT
 270         select SYS_SUPPORTS_SH_MTU2
 271
 272 config CPU_SUBTYPE_SH7263
 273         bool "Support SH7263 processor"
 274         select CPU_SH2A
 275         select CPU_HAS_FPU
 276         select SYS_SUPPORTS_SH_CMT
 277         select SYS_SUPPORTS_SH_MTU2
 278
 279 config CPU_SUBTYPE_SH7264
 280         bool "Support SH7264 processor"
 281         select CPU_SH2A
 282         select CPU_HAS_FPU
 283         select SYS_SUPPORTS_SH_CMT
 284         select SYS_SUPPORTS_SH_MTU2
 285         select PINCTRL
 286
 287 config CPU_SUBTYPE_SH7269
 288         bool "Support SH7269 processor"
 289         select CPU_SH2A
 290         select CPU_HAS_FPU
 291         select SYS_SUPPORTS_SH_CMT
 292         select SYS_SUPPORTS_SH_MTU2
 293         select PINCTRL
 294
 295 config CPU_SUBTYPE_MXG
 296         bool "Support MX-G processor"
 297         select CPU_SH2A
 298         select SYS_SUPPORTS_SH_MTU2
 299         help
 300           Select MX-G if running on an R8A03022BG part.
 301
 302 # SH-3 Processor Support
 303
 304 config CPU_SUBTYPE_SH7705
 305         bool "Support SH7705 processor"
 306         select CPU_SH3
 307
 308 config CPU_SUBTYPE_SH7706
 309         bool "Support SH7706 processor"
 310         select CPU_SH3
 311         help
 312           Select SH7706 if you have a 133 Mhz SH-3 HD6417706 CPU.
 313
 314 config CPU_SUBTYPE_SH7707
 315         bool "Support SH7707 processor"
 316         select CPU_SH3
 317         help
 318           Select SH7707 if you have a  60 Mhz SH-3 HD6417707 CPU.
 319
 320 config CPU_SUBTYPE_SH7708
 321         bool "Support SH7708 processor"
 322         select CPU_SH3
 323         help
 324           Select SH7708 if you have a  60 Mhz SH-3 HD6417708S or
 325           if you have a 100 Mhz SH-3 HD6417708R CPU.
 326
 327 config CPU_SUBTYPE_SH7709
 328         bool "Support SH7709 processor"
 329         select CPU_SH3
 330         help
 331           Select SH7709 if you have a  80 Mhz SH-3 HD6417709 CPU.
 332
 333 config CPU_SUBTYPE_SH7710
 334         bool "Support SH7710 processor"
 335         select CPU_SH3
 336         select CPU_HAS_DSP
 337         help
 338           Select SH7710 if you have a SH3-DSP SH7710 CPU.
 339
 340 config CPU_SUBTYPE_SH7712
 341         bool "Support SH7712 processor"
 342         select CPU_SH3
 343         select CPU_HAS_DSP
 344         help
 345           Select SH7712 if you have a SH3-DSP SH7712 CPU.
 346
 347 config CPU_SUBTYPE_SH7720
 348         bool "Support SH7720 processor"
 349         select CPU_SH3
 350         select CPU_HAS_DSP
 351         select SYS_SUPPORTS_SH_CMT
 352         select ARCH_WANT_OPTIONAL_GPIOLIB
 353         select USB_OHCI_SH if USB_OHCI_HCD
 354         select PINCTRL
 355         help
 356           Select SH7720 if you have a SH3-DSP SH7720 CPU.
 357
 358 config CPU_SUBTYPE_SH7721
 359         bool "Support SH7721 processor"
 360         select CPU_SH3
 361         select CPU_HAS_DSP
 362         select SYS_SUPPORTS_SH_CMT
 363         select USB_OHCI_SH if USB_OHCI_HCD
 364         help
 365           Select SH7721 if you have a SH3-DSP SH7721 CPU.
 366
 367 # SH-4 Processor Support
 368
 369 config CPU_SUBTYPE_SH7750
 370         bool "Support SH7750 processor"
 371         select CPU_SH4
 372         help
 373           Select SH7750 if you have a 200 Mhz SH-4 HD6417750 CPU.
 374
 375 config CPU_SUBTYPE_SH7091
 376         bool "Support SH7091 processor"
 377         select CPU_SH4
 378         help
 379           Select SH7091 if you have an SH-4 based Sega device (such as
 380           the Dreamcast, Naomi, and Naomi 2).
 381
 382 config CPU_SUBTYPE_SH7750R
 383         bool "Support SH7750R processor"
 384         select CPU_SH4
 385
 386 config CPU_SUBTYPE_SH7750S
 387         bool "Support SH7750S processor"
 388         select CPU_SH4
 389
 390 config CPU_SUBTYPE_SH7751
 391         bool "Support SH7751 processor"
 392         select CPU_SH4
 393         help
 394           Select SH7751 if you have a 166 Mhz SH-4 HD6417751 CPU,
 395           or if you have a HD6417751R CPU.
 396
 397 config CPU_SUBTYPE_SH7751R
 398         bool "Support SH7751R processor"
 399         select CPU_SH4
 400
 401 config CPU_SUBTYPE_SH7760
 402         bool "Support SH7760 processor"
 403         select CPU_SH4
 404
 405 config CPU_SUBTYPE_SH4_202
 406         bool "Support SH4-202 processor"
 407         select CPU_SH4
 408
 409 # SH-4A Processor Support
 410
 411 config CPU_SUBTYPE_SH7723
 412         bool "Support SH7723 processor"
 413         select CPU_SH4A
 414         select CPU_SHX2
 415         select ARCH_SHMOBILE
 416         select ARCH_SPARSEMEM_ENABLE
 417         select SYS_SUPPORTS_SH_CMT
 418         select ARCH_WANT_OPTIONAL_GPIOLIB
 419         select PINCTRL
 420         help
 421           Select SH7723 if you have an SH-MobileR2 CPU.
 422
 423 config CPU_SUBTYPE_SH7724
 424         bool "Support SH7724 processor"
 425         select CPU_SH4A
 426         select CPU_SHX2
 427         select ARCH_SHMOBILE
 428         select ARCH_SPARSEMEM_ENABLE
 429         select SYS_SUPPORTS_SH_CMT
 430         select ARCH_WANT_OPTIONAL_GPIOLIB
 431         select PINCTRL
 432         help
 433           Select SH7724 if you have an SH-MobileR2R CPU.
 434
 435 config CPU_SUBTYPE_SH7734
 436         bool "Support SH7734 processor"
 437         select CPU_SH4A
 438         select CPU_SHX2
 439         select ARCH_WANT_OPTIONAL_GPIOLIB
 440         select PINCTRL
 441         help
 442           Select SH7734 if you have a SH4A SH7734 CPU.
 443
 444 config CPU_SUBTYPE_SH7757
 445         bool "Support SH7757 processor"
 446         select CPU_SH4A
 447         select CPU_SHX2
 448         select ARCH_WANT_OPTIONAL_GPIOLIB
 449         select PINCTRL
 450         help
 451           Select SH7757 if you have a SH4A SH7757 CPU.
 452
 453 config CPU_SUBTYPE_SH7763
 454         bool "Support SH7763 processor"
 455         select CPU_SH4A
 456         select USB_OHCI_SH if USB_OHCI_HCD
 457         help
 458           Select SH7763 if you have a SH4A SH7763(R5S77631) CPU.
 459
 460 config CPU_SUBTYPE_SH7770
 461         bool "Support SH7770 processor"
 462         select CPU_SH4A
 463
 464 config CPU_SUBTYPE_SH7780
 465         bool "Support SH7780 processor"
 466         select CPU_SH4A
 467
 468 config CPU_SUBTYPE_SH7785
 469         bool "Support SH7785 processor"
 470         select CPU_SH4A
 471         select CPU_SHX2
 472         select ARCH_SPARSEMEM_ENABLE
 473         select SYS_SUPPORTS_NUMA
 474         select ARCH_WANT_OPTIONAL_GPIOLIB
 475         select PINCTRL
 476
 477 config CPU_SUBTYPE_SH7786
 478         bool "Support SH7786 processor"
 479         select CPU_SH4A
 480         select CPU_SHX3
 481         select CPU_HAS_PTEAEX
 482         select GENERIC_CLOCKEVENTS_BROADCAST if SMP
 483         select ARCH_WANT_OPTIONAL_GPIOLIB
 484         select USB_OHCI_SH if USB_OHCI_HCD
 485         select USB_EHCI_SH if USB_EHCI_HCD
 486         select PINCTRL
 487
 488 config CPU_SUBTYPE_SHX3
 489         bool "Support SH-X3 processor"
 490         select CPU_SH4A
 491         select CPU_SHX3
 492         select GENERIC_CLOCKEVENTS_BROADCAST if SMP
 493         select ARCH_REQUIRE_GPIOLIB
 494         select PINCTRL
 495
 496 # SH4AL-DSP Processor Support
 497
 498 config CPU_SUBTYPE_SH7343
 499         bool "Support SH7343 processor"
 500         select CPU_SH4AL_DSP
 501         select ARCH_SHMOBILE
 502         select SYS_SUPPORTS_SH_CMT
 503
 504 config CPU_SUBTYPE_SH7722
 505         bool "Support SH7722 processor"
 506         select CPU_SH4AL_DSP
 507         select CPU_SHX2
 508         select ARCH_SHMOBILE
 509         select ARCH_SPARSEMEM_ENABLE
 510         select SYS_SUPPORTS_NUMA
 511         select SYS_SUPPORTS_SH_CMT
 512         select ARCH_WANT_OPTIONAL_GPIOLIB
 513         select PINCTRL
 514
 515 config CPU_SUBTYPE_SH7366
 516         bool "Support SH7366 processor"
 517         select CPU_SH4AL_DSP
 518         select CPU_SHX2
 519         select ARCH_SHMOBILE
 520         select ARCH_SPARSEMEM_ENABLE
 521         select SYS_SUPPORTS_NUMA
 522         select SYS_SUPPORTS_SH_CMT
 523
 524 endchoice
 525
 526 endif
 527
 528 if SUPERH64
 529
 530 choice
 531         prompt "Processor sub-type selection"
 532
 533 # SH-5 Processor Support
 534
 535 config CPU_SUBTYPE_SH5_101
 536         bool "Support SH5-101 processor"
 537         select CPU_SH5
 538
 539 config CPU_SUBTYPE_SH5_103
 540         bool "Support SH5-103 processor"
 541         select CPU_SH5
 542
 543 endchoice
 544
 545 endif
 546
 547 source "arch/sh/mm/Kconfig"
 548
 549 source "arch/sh/Kconfig.cpu"
 550
 551 source "arch/sh/boards/Kconfig"
 552
 553 menu "Timer and clock configuration"
 554
 555 config SH_PCLK_FREQ
 556         int "Peripheral clock frequency (in Hz)"
 557         depends on SH_CLK_CPG_LEGACY
 558         default "31250000" if CPU_SUBTYPE_SH7619
 559         default "33333333" if CPU_SUBTYPE_SH7770 || \
 560                               CPU_SUBTYPE_SH7760 || \
 561                               CPU_SUBTYPE_SH7705 || \
 562                               CPU_SUBTYPE_SH7203 || \
 563                               CPU_SUBTYPE_SH7206 || \
 564                               CPU_SUBTYPE_SH7263 || \
 565                               CPU_SUBTYPE_MXG
 566         default "60000000" if CPU_SUBTYPE_SH7751 || CPU_SUBTYPE_SH7751R
 567         default "66000000" if CPU_SUBTYPE_SH4_202
 568         default "50000000"
 569         help
 570           This option is used to specify the peripheral clock frequency.
 571           This is necessary for determining the reference clock value on
 572           platforms lacking an RTC.
 573
 574 config SH_CLK_CPG
 575         def_bool y
 576
 577 config SH_CLK_CPG_LEGACY
 578         depends on SH_CLK_CPG
 579         def_bool y if !CPU_SUBTYPE_SH7785 && !ARCH_SHMOBILE && \
 580                       !CPU_SHX3 && !CPU_SUBTYPE_SH7757 && \
 581                       !CPU_SUBTYPE_SH7734 && !CPU_SUBTYPE_SH7264 && \
 582                       !CPU_SUBTYPE_SH7269
 583
 584 endmenu
 585
 586 menu "CPU Frequency scaling"
 587 source "drivers/cpufreq/Kconfig"
 588 endmenu
 589
 590 source "arch/sh/drivers/Kconfig"
 591
 592 endmenu
 593
 594 menu "Kernel features"
 595
 596 source kernel/Kconfig.hz
 597
 598 config KEXEC
 599         bool "kexec system call (EXPERIMENTAL)"
 600         depends on SUPERH32 && MMU
 601         help
 602           kexec is a system call that implements the ability to shutdown your
 603           current kernel, and to start another kernel.  It is like a reboot
 604           but it is independent of the system firmware.  And like a reboot
 605           you can start any kernel with it, not just Linux.
 606
 607           The name comes from the similarity to the exec system call.
 608
 609           It is an ongoing process to be certain the hardware in a machine
 610           is properly shutdown, so do not be surprised if this code does not
 611           initially work for you.  As of this writing the exact hardware
 612           interface is strongly in flux, so no good recommendation can be
 613           made.
 614
 615 config CRASH_DUMP
 616         bool "kernel crash dumps (EXPERIMENTAL)"
 617         depends on SUPERH32 && BROKEN_ON_SMP
 618         help
 619           Generate crash dump after being started by kexec.
 620           This should be normally only set in special crash dump kernels
 621           which are loaded in the main kernel with kexec-tools into
 622           a specially reserved region and then later executed after
 623           a crash by kdump/kexec. The crash dump kernel must be compiled
 624           to a memory address not used by the main kernel using
 625           PHYSICAL_START.
 626
 627           For more details see Documentation/kdump/kdump.txt
 628
 629 config KEXEC_JUMP
 630         bool "kexec jump (EXPERIMENTAL)"
 631         depends on SUPERH32 && KEXEC && HIBERNATION
 632         help
 633           Jump between original kernel and kexeced kernel and invoke
 634           code via KEXEC
 635
 636 config PHYSICAL_START
 637         hex "Physical address where the kernel is loaded" if (EXPERT || CRASH_DUMP)
 638         default MEMORY_START
 639         ---help---
 640           This gives the physical address where the kernel is loaded
 641           and is ordinarily the same as MEMORY_START.
 642
 643           Different values are primarily used in the case of kexec on panic
 644           where the fail safe kernel needs to run at a different address
 645           than the panic-ed kernel.
 646
 647 config SECCOMP
 648         bool "Enable seccomp to safely compute untrusted bytecode"
 649         depends on PROC_FS
 650         help
 651           This kernel feature is useful for number crunching applications
 652           that may need to compute untrusted bytecode during their
 653           execution. By using pipes or other transports made available to
 654           the process as file descriptors supporting the read/write
 655           syscalls, it's possible to isolate those applications in
 656           their own address space using seccomp. Once seccomp is
 657           enabled via prctl, it cannot be disabled and the task is only
 658           allowed to execute a few safe syscalls defined by each seccomp
 659           mode.
 660
 661           If unsure, say N.
 662
 663 config SMP
 664         bool "Symmetric multi-processing support"
 665         depends on SYS_SUPPORTS_SMP
 666         ---help---
 667           This enables support for systems with more than one CPU. If you have
 668           a system with only one CPU, say N. If you have a system with more
 669           than one CPU, say Y.
 670
 671           If you say N here, the kernel will run on uni- and multiprocessor
 672           machines, but will use only one CPU of a multiprocessor machine. If
 673           you say Y here, the kernel will run on many, but not all,
 674           uniprocessor machines. On a uniprocessor machine, the kernel
 675           will run faster if you say N here.
 676
 677           People using multiprocessor machines who say Y here should also say
 678           Y to "Enhanced Real Time Clock Support", below.
 679
 680           See also <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO
 681           available at <http://www.tldp.org/docs.html#howto>.
 682
 683           If you don't know what to do here, say N.
 684
 685 config NR_CPUS
 686         int "Maximum number of CPUs (2-32)"
 687         range 2 32
 688         depends on SMP
 689         default "4" if CPU_SUBTYPE_SHX3
 690         default "2"
 691         help
 692           This allows you to specify the maximum number of CPUs which this
 693           kernel will support.  The maximum supported value is 32 and the
 694           minimum value which makes sense is 2.
 695
 696           This is purely to save memory - each supported CPU adds
 697           approximately eight kilobytes to the kernel image.
 698
 699 config HOTPLUG_CPU
 700         bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
 701         depends on SMP
 702         help
 703           Say Y here to experiment with turning CPUs off and on.  CPUs
 704           can be controlled through /sys/devices/system/cpu.
 705
 706 source "kernel/Kconfig.preempt"
 707
 708 config GUSA
 709         def_bool y
 710         depends on !SMP && SUPERH32
 711         help
 712           This enables support for gUSA (general UserSpace Atomicity).
 713           This is the default implementation for both UP and non-ll/sc
 714           CPUs, and is used by the libc, amongst others.
 715
 716           For additional information, design information can be found
 717           in <http://lc.linux.or.jp/lc2002/papers/niibe0919p.pdf>.
 718
 719           This should only be disabled for special cases where alternate
 720           atomicity implementations exist.
 721
 722 config GUSA_RB
 723         bool "Implement atomic operations by roll-back (gRB) (EXPERIMENTAL)"
 724         depends on GUSA && CPU_SH3 || (CPU_SH4 && !CPU_SH4A)
 725         help
 726           Enabling this option will allow the kernel to implement some
 727           atomic operations using a software implementation of load-locked/
 728           store-conditional (LLSC). On machines which do not have hardware
 729           LLSC, this should be more efficient than the other alternative of
 730           disabling interrupts around the atomic sequence.
 731
 732 config HW_PERF_EVENTS
 733         bool "Enable hardware performance counter support for perf events"
 734         depends on PERF_EVENTS && CPU_HAS_PMU
 735         default y
 736         help
 737           Enable hardware performance counter support for perf events. If
 738           disabled, perf events will use software events only.
 739
 740 source "drivers/sh/Kconfig"
 741
 742 endmenu
 743
 744 menu "Boot options"
 745
 746 config ZERO_PAGE_OFFSET
 747         hex
 748         default "0x00010000" if PAGE_SIZE_64KB || SH_RTS7751R2D || \
 749                                 SH_7751_SOLUTION_ENGINE
 750         default "0x00004000" if PAGE_SIZE_16KB || SH_SH03
 751         default "0x00002000" if PAGE_SIZE_8KB
 752         default "0x00001000"
 753         help
 754           This sets the default offset of zero page.
 755
 756 config BOOT_LINK_OFFSET
 757         hex
 758         default "0x00210000" if SH_SHMIN
 759         default "0x00400000" if SH_CAYMAN
 760         default "0x00810000" if SH_7780_SOLUTION_ENGINE
 761         default "0x009e0000" if SH_TITAN
 762         default "0x01800000" if SH_SDK7780
 763         default "0x02000000" if SH_EDOSK7760
 764         default "0x00800000"
 765         help
 766           This option allows you to set the link address offset of the zImage.
 767           This can be useful if you are on a board which has a small amount of
 768           memory.
 769
 770 config ENTRY_OFFSET
 771         hex
 772         default "0x00001000" if PAGE_SIZE_4KB
 773         default "0x00002000" if PAGE_SIZE_8KB
 774         default "0x00004000" if PAGE_SIZE_16KB
 775         default "0x00010000" if PAGE_SIZE_64KB
 776         default "0x00000000"
 777
 778 config ROMIMAGE_MMCIF
 779         bool "Include MMCIF loader in romImage (EXPERIMENTAL)"
 780         depends on CPU_SUBTYPE_SH7724
 781         help
 782           Say Y here to include experimental MMCIF loading code in
 783           romImage. With this enabled it is possible to write the romImage
 784           kernel image to an MMC card and boot the kernel straight from
 785           the reset vector. At reset the processor Mask ROM will load the
 786           first part of the romImage which in turn loads the rest the kernel
 787           image to RAM using the MMCIF hardware block.
 788
 789 choice
 790         prompt "Kernel command line"
 791         optional
 792         default CMDLINE_OVERWRITE
 793         help
 794           Setting this option allows the kernel command line arguments
 795           to be set.
 796
 797 config CMDLINE_OVERWRITE
 798         bool "Overwrite bootloader kernel arguments"
 799         help
 800           Given string will overwrite any arguments passed in by
 801           a bootloader.
 802
 803 config CMDLINE_EXTEND
 804         bool "Extend bootloader kernel arguments"
 805         help
 806           Given string will be concatenated with arguments passed in
 807           by a bootloader.
 808
 809 endchoice
 810
 811 config CMDLINE
 812         string "Kernel command line arguments string"
 813         depends on CMDLINE_OVERWRITE || CMDLINE_EXTEND
 814         default "console=ttySC1,115200"
 815
 816 endmenu
 817
 818 menu "Bus options"
 819
 820 config SUPERHYWAY
 821         tristate "SuperHyway Bus support"
 822         depends on CPU_SUBTYPE_SH4_202
 823
 824 config MAPLE
 825         bool "Maple Bus support"
 826         depends on SH_DREAMCAST
 827         help
 828          The Maple Bus is SEGA's serial communication bus for peripherals
 829          on the Dreamcast. Without this bus support you won't be able to
 830          get your Dreamcast keyboard etc to work, so most users
 831          probably want to say 'Y' here, unless you are only using the
 832          Dreamcast with a serial line terminal or a remote network
 833          connection.
 834
 835 config PCI
 836         bool "PCI support"
 837         depends on SYS_SUPPORTS_PCI
 838         select PCI_DOMAINS
 839         select GENERIC_PCI_IOMAP
 840         select NO_GENERIC_PCI_IOPORT_MAP
 841         help
 842           Find out whether you have a PCI motherboard. PCI is the name of a
 843           bus system, i.e. the way the CPU talks to the other stuff inside
 844           your box. If you have PCI, say Y, otherwise N.
 845
 846 config PCI_DOMAINS
 847         bool
 848
 849 source "drivers/pci/pcie/Kconfig"
 850
 851 source "drivers/pci/Kconfig"
 852
 853 source "drivers/pcmcia/Kconfig"
 854
 855 source "drivers/pci/hotplug/Kconfig"
 856
 857 endmenu
 858
 859 menu "Executable file formats"
 860
 861 source "fs/Kconfig.binfmt"
 862
 863 endmenu
 864
 865 menu "Power management options (EXPERIMENTAL)"
 866
 867 source "kernel/power/Kconfig"
 868
 869 source "drivers/cpuidle/Kconfig"
 870
 871 endmenu
 872
 873 source "net/Kconfig"
 874
 875 source "drivers/Kconfig"
 876
 877 source "fs/Kconfig"
 878
 879 source "arch/sh/Kconfig.debug"
 880
 881 source "security/Kconfig"
 882
 883 source "crypto/Kconfig"
 884
 885 source "lib/Kconfig"