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