arch/sh/Kconfig

   1 config SUPERH
   2         def_bool y
   3         select ARCH_MIGHT_HAVE_PC_PARPORT
   4         select EXPERT
   5         select CLKDEV_LOOKUP
   6         select HAVE_IDE if HAS_IOPORT
   7         select HAVE_MEMBLOCK
   8         select HAVE_MEMBLOCK_NODE_MAP
   9         select ARCH_DISCARD_MEMBLOCK
  10         select HAVE_OPROFILE
  11         select HAVE_GENERIC_DMA_COHERENT
  12         select HAVE_ARCH_TRACEHOOK
  13         select HAVE_DMA_API_DEBUG
  14         select HAVE_DMA_ATTRS
  15         select HAVE_PERF_EVENTS
  16         select HAVE_DEBUG_BUGVERBOSE
  17         select ARCH_HAVE_CUSTOM_GPIO_H
  18         select ARCH_HAVE_NMI_SAFE_CMPXCHG if (GUSA_RB || CPU_SH4A)
  19         select PERF_USE_VMALLOC
  20         select HAVE_DEBUG_KMEMLEAK
  21         select HAVE_KERNEL_GZIP
  22         select HAVE_KERNEL_BZIP2
  23         select HAVE_KERNEL_LZMA
  24         select HAVE_KERNEL_XZ
  25         select HAVE_KERNEL_LZO
  26         select HAVE_UID16
  27         select ARCH_WANT_IPC_PARSE_VERSION
  28         select HAVE_SYSCALL_TRACEPOINTS
  29         select HAVE_REGS_AND_STACK_ACCESS_API
  30         select MAY_HAVE_SPARSE_IRQ
  31         select IRQ_FORCED_THREADING
  32         select RTC_LIB
  33         select GENERIC_ATOMIC64
  34         select GENERIC_IRQ_SHOW
  35         select GENERIC_SMP_IDLE_THREAD
  36         select GENERIC_IDLE_POLL_SETUP
  37         select GENERIC_CLOCKEVENTS
  38         select GENERIC_CMOS_UPDATE if SH_SH03 || SH_DREAMCAST
  39         select GENERIC_STRNCPY_FROM_USER
  40         select GENERIC_STRNLEN_USER
  41         select HAVE_MOD_ARCH_SPECIFIC if DWARF_UNWINDER
  42         select MODULES_USE_ELF_RELA
  43         select OLD_SIGSUSPEND
  44         select OLD_SIGACTION
  45         help
  46           The SuperH is a RISC processor targeted for use in embedded systems
  47           and consumer electronics; it was also used in the Sega Dreamcast
  48           gaming console.  The SuperH port has a home page at
  49           <http://www.linux-sh.org/>.
  50
  51 config SUPERH32
  52         def_bool ARCH = "sh"
  53         select HAVE_KPROBES
  54         select HAVE_KRETPROBES
  55         select HAVE_IOREMAP_PROT if MMU && !X2TLB
  56         select HAVE_FUNCTION_TRACER
  57         select HAVE_FTRACE_MCOUNT_RECORD
  58         select HAVE_DYNAMIC_FTRACE
  59         select HAVE_FUNCTION_TRACE_MCOUNT_TEST
  60         select HAVE_FTRACE_NMI_ENTER if DYNAMIC_FTRACE
  61         select ARCH_WANT_IPC_PARSE_VERSION
  62         select HAVE_FUNCTION_GRAPH_TRACER
  63         select HAVE_ARCH_KGDB
  64         select HAVE_HW_BREAKPOINT
  65         select HAVE_MIXED_BREAKPOINTS_REGS
  66         select PERF_EVENTS
  67         select ARCH_HIBERNATION_POSSIBLE if MMU
  68         select SPARSE_IRQ
  69         select HAVE_CC_STACKPROTECTOR
  70
  71 config SUPERH64
  72         def_bool ARCH = "sh64"
  73         select KALLSYMS
  74
  75 config ARCH_DEFCONFIG
  76         string
  77         default "arch/sh/configs/shx3_defconfig" if SUPERH32
  78         default "arch/sh/configs/cayman_defconfig" if SUPERH64
  79
  80 config RWSEM_GENERIC_SPINLOCK
  81         def_bool y
  82
  83 config RWSEM_XCHGADD_ALGORITHM
  84         bool
  85
  86 config GENERIC_BUG
  87         def_bool y
  88         depends on BUG && SUPERH32
  89
  90 config GENERIC_CSUM
  91         def_bool y
  92         depends on SUPERH64
  93
  94 config GENERIC_HWEIGHT
  95         def_bool y
  96
  97 config GENERIC_CALIBRATE_DELAY
  98         bool
  99
 100 config GENERIC_LOCKBREAK
 101         def_bool y
 102         depends on SMP && PREEMPT
 103
 104 config ARCH_SUSPEND_POSSIBLE
 105         def_bool n
 106
 107 config ARCH_HIBERNATION_POSSIBLE
 108         def_bool n
 109
 110 config SYS_SUPPORTS_APM_EMULATION
 111         bool
 112         select ARCH_SUSPEND_POSSIBLE
 113
 114 config SYS_SUPPORTS_HUGETLBFS
 115         bool
 116
 117 config SYS_SUPPORTS_SMP
 118         bool
 119
 120 config SYS_SUPPORTS_NUMA
 121         bool
 122
 123 config SYS_SUPPORTS_PCI
 124         bool
 125
 126 config SYS_SUPPORTS_CMT
 127         bool
 128
 129 config SYS_SUPPORTS_MTU2
 130         bool
 131
 132 config SYS_SUPPORTS_TMU
 133         bool
 134
 135 config STACKTRACE_SUPPORT
 136         def_bool y
 137
 138 config LOCKDEP_SUPPORT
 139         def_bool y
 140
 141 config HAVE_LATENCYTOP_SUPPORT
 142         def_bool y
 143
 144 config ARCH_HAS_ILOG2_U32
 145         def_bool n
 146
 147 config ARCH_HAS_ILOG2_U64
 148         def_bool n
 149
 150 config NO_IOPORT
 151         def_bool !PCI
 152         depends on !SH_CAYMAN && !SH_SH4202_MICRODEV && !SH_SHMIN && \
 153                    !SH_HP6XX && !SH_SOLUTION_ENGINE
 154
 155 config IO_TRAPPED
 156         bool
 157
 158 config SWAP_IO_SPACE
 159         bool
 160
 161 config DMA_COHERENT
 162         bool
 163
 164 config DMA_NONCOHERENT
 165         def_bool !DMA_COHERENT
 166
 167 config NEED_DMA_MAP_STATE
 168         def_bool DMA_NONCOHERENT
 169
 170 config NEED_SG_DMA_LENGTH
 171         def_bool y
 172
 173 source "init/Kconfig"
 174
 175 source "kernel/Kconfig.freezer"
 176
 177 menu "System type"
 178
 179 #
 180 # Processor families
 181 #
 182 config CPU_SH2
 183         bool
 184
 185 config CPU_SH2A
 186         bool
 187         select CPU_SH2
 188         select UNCACHED_MAPPING
 189
 190 config CPU_SH3
 191         bool
 192         select CPU_HAS_INTEVT
 193         select CPU_HAS_SR_RB
 194         select SYS_SUPPORTS_TMU
 195
 196 config CPU_SH4
 197         bool
 198         select CPU_HAS_INTEVT
 199         select CPU_HAS_SR_RB
 200         select CPU_HAS_FPU if !CPU_SH4AL_DSP
 201         select SYS_SUPPORTS_TMU
 202         select SYS_SUPPORTS_HUGETLBFS if MMU
 203
 204 config CPU_SH4A
 205         bool
 206         select CPU_SH4
 207
 208 config CPU_SH4AL_DSP
 209         bool
 210         select CPU_SH4A
 211         select CPU_HAS_DSP
 212
 213 config CPU_SH5
 214         bool
 215         select CPU_HAS_FPU
 216         select SYS_SUPPORTS_TMU
 217         select SYS_SUPPORTS_HUGETLBFS if MMU
 218
 219 config CPU_SHX2
 220         bool
 221
 222 config CPU_SHX3
 223         bool
 224         select DMA_COHERENT
 225         select SYS_SUPPORTS_SMP
 226         select SYS_SUPPORTS_NUMA
 227
 228 config ARCH_SHMOBILE
 229         bool
 230         select ARCH_SUSPEND_POSSIBLE
 231         select PM
 232         select PM_RUNTIME
 233
 234 config CPU_HAS_PMU
 235        depends on CPU_SH4 || CPU_SH4A
 236        default y
 237        bool
 238
 239 if SUPERH32
 240
 241 choice
 242         prompt "Processor sub-type selection"
 243
 244 #
 245 # Processor subtypes
 246 #
 247
 248 # SH-2 Processor Support
 249
 250 config CPU_SUBTYPE_SH7619
 251         bool "Support SH7619 processor"
 252         select CPU_SH2
 253         select SYS_SUPPORTS_CMT
 254
 255 # SH-2A Processor Support
 256
 257 config CPU_SUBTYPE_SH7201
 258         bool "Support SH7201 processor"
 259         select CPU_SH2A
 260         select CPU_HAS_FPU
 261         select SYS_SUPPORTS_MTU2
 262
 263 config CPU_SUBTYPE_SH7203
 264         bool "Support SH7203 processor"
 265         select CPU_SH2A
 266         select CPU_HAS_FPU
 267         select SYS_SUPPORTS_CMT
 268         select SYS_SUPPORTS_MTU2
 269         select ARCH_WANT_OPTIONAL_GPIOLIB
 270         select PINCTRL
 271
 272 config CPU_SUBTYPE_SH7206
 273         bool "Support SH7206 processor"
 274         select CPU_SH2A
 275         select SYS_SUPPORTS_CMT
 276         select SYS_SUPPORTS_MTU2
 277
 278 config CPU_SUBTYPE_SH7263
 279         bool "Support SH7263 processor"
 280         select CPU_SH2A
 281         select CPU_HAS_FPU
 282         select SYS_SUPPORTS_CMT
 283         select SYS_SUPPORTS_MTU2
 284
 285 config CPU_SUBTYPE_SH7264
 286         bool "Support SH7264 processor"
 287         select CPU_SH2A
 288         select CPU_HAS_FPU
 289         select SYS_SUPPORTS_CMT
 290         select SYS_SUPPORTS_MTU2
 291         select PINCTRL
 292
 293 config CPU_SUBTYPE_SH7269
 294         bool "Support SH7269 processor"
 295         select CPU_SH2A
 296         select CPU_HAS_FPU
 297         select SYS_SUPPORTS_CMT
 298         select SYS_SUPPORTS_MTU2
 299         select PINCTRL
 300
 301 config CPU_SUBTYPE_MXG
 302         bool "Support MX-G processor"
 303         select CPU_SH2A
 304         select SYS_SUPPORTS_MTU2
 305         help
 306           Select MX-G if running on an R8A03022BG part.
 307
 308 # SH-3 Processor Support
 309
 310 config CPU_SUBTYPE_SH7705
 311         bool "Support SH7705 processor"
 312         select CPU_SH3
 313
 314 config CPU_SUBTYPE_SH7706
 315         bool "Support SH7706 processor"
 316         select CPU_SH3
 317         help
 318           Select SH7706 if you have a 133 Mhz SH-3 HD6417706 CPU.
 319
 320 config CPU_SUBTYPE_SH7707
 321         bool "Support SH7707 processor"
 322         select CPU_SH3
 323         help
 324           Select SH7707 if you have a  60 Mhz SH-3 HD6417707 CPU.
 325
 326 config CPU_SUBTYPE_SH7708
 327         bool "Support SH7708 processor"
 328         select CPU_SH3
 329         help
 330           Select SH7708 if you have a  60 Mhz SH-3 HD6417708S or
 331           if you have a 100 Mhz SH-3 HD6417708R CPU.
 332
 333 config CPU_SUBTYPE_SH7709
 334         bool "Support SH7709 processor"
 335         select CPU_SH3
 336         help
 337           Select SH7709 if you have a  80 Mhz SH-3 HD6417709 CPU.
 338
 339 config CPU_SUBTYPE_SH7710
 340         bool "Support SH7710 processor"
 341         select CPU_SH3
 342         select CPU_HAS_DSP
 343         help
 344           Select SH7710 if you have a SH3-DSP SH7710 CPU.
 345
 346 config CPU_SUBTYPE_SH7712
 347         bool "Support SH7712 processor"
 348         select CPU_SH3
 349         select CPU_HAS_DSP
 350         help
 351           Select SH7712 if you have a SH3-DSP SH7712 CPU.
 352
 353 config CPU_SUBTYPE_SH7720
 354         bool "Support SH7720 processor"
 355         select CPU_SH3
 356         select CPU_HAS_DSP
 357         select SYS_SUPPORTS_CMT
 358         select ARCH_WANT_OPTIONAL_GPIOLIB
 359         select USB_ARCH_HAS_OHCI
 360         select USB_OHCI_SH if USB_OHCI_HCD
 361         select PINCTRL
 362         help
 363           Select SH7720 if you have a SH3-DSP SH7720 CPU.
 364
 365 config CPU_SUBTYPE_SH7721
 366         bool "Support SH7721 processor"
 367         select CPU_SH3
 368         select CPU_HAS_DSP
 369         select SYS_SUPPORTS_CMT
 370         select USB_ARCH_HAS_OHCI
 371         select USB_OHCI_SH if USB_OHCI_HCD
 372         help
 373           Select SH7721 if you have a SH3-DSP SH7721 CPU.
 374
 375 # SH-4 Processor Support
 376
 377 config CPU_SUBTYPE_SH7750
 378         bool "Support SH7750 processor"
 379         select CPU_SH4
 380         help
 381           Select SH7750 if you have a 200 Mhz SH-4 HD6417750 CPU.
 382
 383 config CPU_SUBTYPE_SH7091
 384         bool "Support SH7091 processor"
 385         select CPU_SH4
 386         help
 387           Select SH7091 if you have an SH-4 based Sega device (such as
 388           the Dreamcast, Naomi, and Naomi 2).
 389
 390 config CPU_SUBTYPE_SH7750R
 391         bool "Support SH7750R processor"
 392         select CPU_SH4
 393
 394 config CPU_SUBTYPE_SH7750S
 395         bool "Support SH7750S processor"
 396         select CPU_SH4
 397
 398 config CPU_SUBTYPE_SH7751
 399         bool "Support SH7751 processor"
 400         select CPU_SH4
 401         help
 402           Select SH7751 if you have a 166 Mhz SH-4 HD6417751 CPU,
 403           or if you have a HD6417751R CPU.
 404
 405 config CPU_SUBTYPE_SH7751R
 406         bool "Support SH7751R processor"
 407         select CPU_SH4
 408
 409 config CPU_SUBTYPE_SH7760
 410         bool "Support SH7760 processor"
 411         select CPU_SH4
 412
 413 config CPU_SUBTYPE_SH4_202
 414         bool "Support SH4-202 processor"
 415         select CPU_SH4
 416
 417 # SH-4A Processor Support
 418
 419 config CPU_SUBTYPE_SH7723
 420         bool "Support SH7723 processor"
 421         select CPU_SH4A
 422         select CPU_SHX2
 423         select ARCH_SHMOBILE
 424         select ARCH_SPARSEMEM_ENABLE
 425         select SYS_SUPPORTS_CMT
 426         select ARCH_WANT_OPTIONAL_GPIOLIB
 427         select PINCTRL
 428         help
 429           Select SH7723 if you have an SH-MobileR2 CPU.
 430
 431 config CPU_SUBTYPE_SH7724
 432         bool "Support SH7724 processor"
 433         select CPU_SH4A
 434         select CPU_SHX2
 435         select ARCH_SHMOBILE
 436         select ARCH_SPARSEMEM_ENABLE
 437         select SYS_SUPPORTS_CMT
 438         select ARCH_WANT_OPTIONAL_GPIOLIB
 439         select PINCTRL
 440         help
 441           Select SH7724 if you have an SH-MobileR2R CPU.
 442
 443 config CPU_SUBTYPE_SH7734
 444         bool "Support SH7734 processor"
 445         select CPU_SH4A
 446         select CPU_SHX2
 447         select ARCH_WANT_OPTIONAL_GPIOLIB
 448         select USB_ARCH_HAS_OHCI
 449         select USB_ARCH_HAS_EHCI
 450         select PINCTRL
 451         help
 452           Select SH7734 if you have a SH4A SH7734 CPU.
 453
 454 config CPU_SUBTYPE_SH7757
 455         bool "Support SH7757 processor"
 456         select CPU_SH4A
 457         select CPU_SHX2
 458         select ARCH_WANT_OPTIONAL_GPIOLIB
 459         select USB_ARCH_HAS_OHCI
 460         select USB_ARCH_HAS_EHCI
 461         select PINCTRL
 462         help
 463           Select SH7757 if you have a SH4A SH7757 CPU.
 464
 465 config CPU_SUBTYPE_SH7763
 466         bool "Support SH7763 processor"
 467         select CPU_SH4A
 468         select USB_ARCH_HAS_OHCI
 469         select USB_OHCI_SH if USB_OHCI_HCD
 470         help
 471           Select SH7763 if you have a SH4A SH7763(R5S77631) CPU.
 472
 473 config CPU_SUBTYPE_SH7770
 474         bool "Support SH7770 processor"
 475         select CPU_SH4A
 476
 477 config CPU_SUBTYPE_SH7780
 478         bool "Support SH7780 processor"
 479         select CPU_SH4A
 480
 481 config CPU_SUBTYPE_SH7785
 482         bool "Support SH7785 processor"
 483         select CPU_SH4A
 484         select CPU_SHX2
 485         select ARCH_SPARSEMEM_ENABLE
 486         select SYS_SUPPORTS_NUMA
 487         select ARCH_WANT_OPTIONAL_GPIOLIB
 488         select PINCTRL
 489
 490 config CPU_SUBTYPE_SH7786
 491         bool "Support SH7786 processor"
 492         select CPU_SH4A
 493         select CPU_SHX3
 494         select CPU_HAS_PTEAEX
 495         select GENERIC_CLOCKEVENTS_BROADCAST if SMP
 496         select ARCH_WANT_OPTIONAL_GPIOLIB
 497         select USB_ARCH_HAS_OHCI
 498         select USB_OHCI_SH if USB_OHCI_HCD
 499         select USB_ARCH_HAS_EHCI
 500         select USB_EHCI_SH if USB_EHCI_HCD
 501         select PINCTRL
 502
 503 config CPU_SUBTYPE_SHX3
 504         bool "Support SH-X3 processor"
 505         select CPU_SH4A
 506         select CPU_SHX3
 507         select GENERIC_CLOCKEVENTS_BROADCAST if SMP
 508         select ARCH_REQUIRE_GPIOLIB
 509         select PINCTRL
 510
 511 # SH4AL-DSP Processor Support
 512
 513 config CPU_SUBTYPE_SH7343
 514         bool "Support SH7343 processor"
 515         select CPU_SH4AL_DSP
 516         select ARCH_SHMOBILE
 517         select SYS_SUPPORTS_CMT
 518
 519 config CPU_SUBTYPE_SH7722
 520         bool "Support SH7722 processor"
 521         select CPU_SH4AL_DSP
 522         select CPU_SHX2
 523         select ARCH_SHMOBILE
 524         select ARCH_SPARSEMEM_ENABLE
 525         select SYS_SUPPORTS_NUMA
 526         select SYS_SUPPORTS_CMT
 527         select ARCH_WANT_OPTIONAL_GPIOLIB
 528         select PINCTRL
 529
 530 config CPU_SUBTYPE_SH7366
 531         bool "Support SH7366 processor"
 532         select CPU_SH4AL_DSP
 533         select CPU_SHX2
 534         select ARCH_SHMOBILE
 535         select ARCH_SPARSEMEM_ENABLE
 536         select SYS_SUPPORTS_NUMA
 537         select SYS_SUPPORTS_CMT
 538
 539 endchoice
 540
 541 endif
 542
 543 if SUPERH64
 544
 545 choice
 546         prompt "Processor sub-type selection"
 547
 548 # SH-5 Processor Support
 549
 550 config CPU_SUBTYPE_SH5_101
 551         bool "Support SH5-101 processor"
 552         select CPU_SH5
 553
 554 config CPU_SUBTYPE_SH5_103
 555         bool "Support SH5-103 processor"
 556         select CPU_SH5
 557
 558 endchoice
 559
 560 endif
 561
 562 source "arch/sh/mm/Kconfig"
 563
 564 source "arch/sh/Kconfig.cpu"
 565
 566 source "arch/sh/boards/Kconfig"
 567
 568 menu "Timer and clock configuration"
 569
 570 config SH_TIMER_TMU
 571         bool "TMU timer driver"
 572         depends on SYS_SUPPORTS_TMU
 573         default y
 574         help
 575           This enables the build of the TMU timer driver.
 576
 577 config SH_TIMER_CMT
 578         bool "CMT timer driver"
 579         depends on SYS_SUPPORTS_CMT
 580         default y
 581         help
 582           This enables build of the CMT timer driver.
 583
 584 config SH_TIMER_MTU2
 585         bool "MTU2 timer driver"
 586         depends on SYS_SUPPORTS_MTU2
 587         default y
 588         help
 589           This enables build of the MTU2 timer driver.
 590
 591 config SH_PCLK_FREQ
 592         int "Peripheral clock frequency (in Hz)"
 593         depends on SH_CLK_CPG_LEGACY
 594         default "31250000" if CPU_SUBTYPE_SH7619
 595         default "33333333" if CPU_SUBTYPE_SH7770 || \
 596                               CPU_SUBTYPE_SH7760 || \
 597                               CPU_SUBTYPE_SH7705 || \
 598                               CPU_SUBTYPE_SH7203 || \
 599                               CPU_SUBTYPE_SH7206 || \
 600                               CPU_SUBTYPE_SH7263 || \
 601                               CPU_SUBTYPE_MXG
 602         default "60000000" if CPU_SUBTYPE_SH7751 || CPU_SUBTYPE_SH7751R
 603         default "66000000" if CPU_SUBTYPE_SH4_202
 604         default "50000000"
 605         help
 606           This option is used to specify the peripheral clock frequency.
 607           This is necessary for determining the reference clock value on
 608           platforms lacking an RTC.
 609
 610 config SH_CLK_CPG
 611         def_bool y
 612
 613 config SH_CLK_CPG_LEGACY
 614         depends on SH_CLK_CPG
 615         def_bool y if !CPU_SUBTYPE_SH7785 && !ARCH_SHMOBILE && \
 616                       !CPU_SHX3 && !CPU_SUBTYPE_SH7757 && \
 617                       !CPU_SUBTYPE_SH7734 && !CPU_SUBTYPE_SH7264 && \
 618                       !CPU_SUBTYPE_SH7269
 619
 620 endmenu
 621
 622 menu "CPU Frequency scaling"
 623 source "drivers/cpufreq/Kconfig"
 624 endmenu
 625
 626 source "arch/sh/drivers/Kconfig"
 627
 628 endmenu
 629
 630 menu "Kernel features"
 631
 632 source kernel/Kconfig.hz
 633
 634 config KEXEC
 635         bool "kexec system call (EXPERIMENTAL)"
 636         depends on SUPERH32 && MMU
 637         help
 638           kexec is a system call that implements the ability to shutdown your
 639           current kernel, and to start another kernel.  It is like a reboot
 640           but it is independent of the system firmware.  And like a reboot
 641           you can start any kernel with it, not just Linux.
 642
 643           The name comes from the similarity to the exec system call.
 644
 645           It is an ongoing process to be certain the hardware in a machine
 646           is properly shutdown, so do not be surprised if this code does not
 647           initially work for you.  As of this writing the exact hardware
 648           interface is strongly in flux, so no good recommendation can be
 649           made.
 650
 651 config CRASH_DUMP
 652         bool "kernel crash dumps (EXPERIMENTAL)"
 653         depends on SUPERH32 && BROKEN_ON_SMP
 654         help
 655           Generate crash dump after being started by kexec.
 656           This should be normally only set in special crash dump kernels
 657           which are loaded in the main kernel with kexec-tools into
 658           a specially reserved region and then later executed after
 659           a crash by kdump/kexec. The crash dump kernel must be compiled
 660           to a memory address not used by the main kernel using
 661           PHYSICAL_START.
 662
 663           For more details see Documentation/kdump/kdump.txt
 664
 665 config KEXEC_JUMP
 666         bool "kexec jump (EXPERIMENTAL)"
 667         depends on SUPERH32 && KEXEC && HIBERNATION
 668         help
 669           Jump between original kernel and kexeced kernel and invoke
 670           code via KEXEC
 671
 672 config PHYSICAL_START
 673         hex "Physical address where the kernel is loaded" if (EXPERT || CRASH_DUMP)
 674         default MEMORY_START
 675         ---help---
 676           This gives the physical address where the kernel is loaded
 677           and is ordinarily the same as MEMORY_START.
 678
 679           Different values are primarily used in the case of kexec on panic
 680           where the fail safe kernel needs to run at a different address
 681           than the panic-ed kernel.
 682
 683 config SECCOMP
 684         bool "Enable seccomp to safely compute untrusted bytecode"
 685         depends on PROC_FS
 686         help
 687           This kernel feature is useful for number crunching applications
 688           that may need to compute untrusted bytecode during their
 689           execution. By using pipes or other transports made available to
 690           the process as file descriptors supporting the read/write
 691           syscalls, it's possible to isolate those applications in
 692           their own address space using seccomp. Once seccomp is
 693           enabled via prctl, it cannot be disabled and the task is only
 694           allowed to execute a few safe syscalls defined by each seccomp
 695           mode.
 696
 697           If unsure, say N.
 698
 699 config SMP
 700         bool "Symmetric multi-processing support"
 701         depends on SYS_SUPPORTS_SMP
 702         ---help---
 703           This enables support for systems with more than one CPU. If you have
 704           a system with only one CPU, say N. If you have a system with more
 705           than one CPU, say Y.
 706
 707           If you say N here, the kernel will run on uni- and multiprocessor
 708           machines, but will use only one CPU of a multiprocessor machine. If
 709           you say Y here, the kernel will run on many, but not all,
 710           uniprocessor machines. On a uniprocessor machine, the kernel
 711           will run faster if you say N here.
 712
 713           People using multiprocessor machines who say Y here should also say
 714           Y to "Enhanced Real Time Clock Support", below.
 715
 716           See also <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO
 717           available at <http://www.tldp.org/docs.html#howto>.
 718
 719           If you don't know what to do here, say N.
 720
 721 config NR_CPUS
 722         int "Maximum number of CPUs (2-32)"
 723         range 2 32
 724         depends on SMP
 725         default "4" if CPU_SUBTYPE_SHX3
 726         default "2"
 727         help
 728           This allows you to specify the maximum number of CPUs which this
 729           kernel will support.  The maximum supported value is 32 and the
 730           minimum value which makes sense is 2.
 731
 732           This is purely to save memory - each supported CPU adds
 733           approximately eight kilobytes to the kernel image.
 734
 735 config HOTPLUG_CPU
 736         bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
 737         depends on SMP
 738         help
 739           Say Y here to experiment with turning CPUs off and on.  CPUs
 740           can be controlled through /sys/devices/system/cpu.
 741
 742 source "kernel/Kconfig.preempt"
 743
 744 config GUSA
 745         def_bool y
 746         depends on !SMP && SUPERH32
 747         help
 748           This enables support for gUSA (general UserSpace Atomicity).
 749           This is the default implementation for both UP and non-ll/sc
 750           CPUs, and is used by the libc, amongst others.
 751
 752           For additional information, design information can be found
 753           in <http://lc.linux.or.jp/lc2002/papers/niibe0919p.pdf>.
 754
 755           This should only be disabled for special cases where alternate
 756           atomicity implementations exist.
 757
 758 config GUSA_RB
 759         bool "Implement atomic operations by roll-back (gRB) (EXPERIMENTAL)"
 760         depends on GUSA && CPU_SH3 || (CPU_SH4 && !CPU_SH4A)
 761         help
 762           Enabling this option will allow the kernel to implement some
 763           atomic operations using a software implementation of load-locked/
 764           store-conditional (LLSC). On machines which do not have hardware
 765           LLSC, this should be more efficient than the other alternative of
 766           disabling interrupts around the atomic sequence.
 767
 768 config HW_PERF_EVENTS
 769         bool "Enable hardware performance counter support for perf events"
 770         depends on PERF_EVENTS && CPU_HAS_PMU
 771         default y
 772         help
 773           Enable hardware performance counter support for perf events. If
 774           disabled, perf events will use software events only.
 775
 776 source "drivers/sh/Kconfig"
 777
 778 endmenu
 779
 780 menu "Boot options"
 781
 782 config ZERO_PAGE_OFFSET
 783         hex
 784         default "0x00010000" if PAGE_SIZE_64KB || SH_RTS7751R2D || \
 785                                 SH_7751_SOLUTION_ENGINE
 786         default "0x00004000" if PAGE_SIZE_16KB || SH_SH03
 787         default "0x00002000" if PAGE_SIZE_8KB
 788         default "0x00001000"
 789         help
 790           This sets the default offset of zero page.
 791
 792 config BOOT_LINK_OFFSET
 793         hex
 794         default "0x00210000" if SH_SHMIN
 795         default "0x00400000" if SH_CAYMAN
 796         default "0x00810000" if SH_7780_SOLUTION_ENGINE
 797         default "0x009e0000" if SH_TITAN
 798         default "0x01800000" if SH_SDK7780
 799         default "0x02000000" if SH_EDOSK7760
 800         default "0x00800000"
 801         help
 802           This option allows you to set the link address offset of the zImage.
 803           This can be useful if you are on a board which has a small amount of
 804           memory.
 805
 806 config ENTRY_OFFSET
 807         hex
 808         default "0x00001000" if PAGE_SIZE_4KB
 809         default "0x00002000" if PAGE_SIZE_8KB
 810         default "0x00004000" if PAGE_SIZE_16KB
 811         default "0x00010000" if PAGE_SIZE_64KB
 812         default "0x00000000"
 813
 814 config ROMIMAGE_MMCIF
 815         bool "Include MMCIF loader in romImage (EXPERIMENTAL)"
 816         depends on CPU_SUBTYPE_SH7724
 817         help
 818           Say Y here to include experimental MMCIF loading code in
 819           romImage. With this enabled it is possible to write the romImage
 820           kernel image to an MMC card and boot the kernel straight from
 821           the reset vector. At reset the processor Mask ROM will load the
 822           first part of the romImage which in turn loads the rest the kernel
 823           image to RAM using the MMCIF hardware block.
 824
 825 choice
 826         prompt "Kernel command line"
 827         optional
 828         default CMDLINE_OVERWRITE
 829         help
 830           Setting this option allows the kernel command line arguments
 831           to be set.
 832
 833 config CMDLINE_OVERWRITE
 834         bool "Overwrite bootloader kernel arguments"
 835         help
 836           Given string will overwrite any arguments passed in by
 837           a bootloader.
 838
 839 config CMDLINE_EXTEND
 840         bool "Extend bootloader kernel arguments"
 841         help
 842           Given string will be concatenated with arguments passed in
 843           by a bootloader.
 844
 845 endchoice
 846
 847 config CMDLINE
 848         string "Kernel command line arguments string"
 849         depends on CMDLINE_OVERWRITE || CMDLINE_EXTEND
 850         default "console=ttySC1,115200"
 851
 852 endmenu
 853
 854 menu "Bus options"
 855
 856 config SUPERHYWAY
 857         tristate "SuperHyway Bus support"
 858         depends on CPU_SUBTYPE_SH4_202
 859
 860 config MAPLE
 861         bool "Maple Bus support"
 862         depends on SH_DREAMCAST
 863         help
 864          The Maple Bus is SEGA's serial communication bus for peripherals
 865          on the Dreamcast. Without this bus support you won't be able to
 866          get your Dreamcast keyboard etc to work, so most users
 867          probably want to say 'Y' here, unless you are only using the
 868          Dreamcast with a serial line terminal or a remote network
 869          connection.
 870
 871 config PCI
 872         bool "PCI support"
 873         depends on SYS_SUPPORTS_PCI
 874         select PCI_DOMAINS
 875         select GENERIC_PCI_IOMAP
 876         select NO_GENERIC_PCI_IOPORT_MAP
 877         help
 878           Find out whether you have a PCI motherboard. PCI is the name of a
 879           bus system, i.e. the way the CPU talks to the other stuff inside
 880           your box. If you have PCI, say Y, otherwise N.
 881
 882 config PCI_DOMAINS
 883         bool
 884
 885 source "drivers/pci/pcie/Kconfig"
 886
 887 source "drivers/pci/Kconfig"
 888
 889 source "drivers/pcmcia/Kconfig"
 890
 891 source "drivers/pci/hotplug/Kconfig"
 892
 893 endmenu
 894
 895 menu "Executable file formats"
 896
 897 source "fs/Kconfig.binfmt"
 898
 899 endmenu
 900
 901 menu "Power management options (EXPERIMENTAL)"
 902
 903 source "kernel/power/Kconfig"
 904
 905 source "drivers/cpuidle/Kconfig"
 906
 907 endmenu
 908
 909 source "net/Kconfig"
 910
 911 source "drivers/Kconfig"
 912
 913 source "fs/Kconfig"
 914
 915 source "arch/sh/Kconfig.debug"
 916
 917 source "security/Kconfig"
 918
 919 source "crypto/Kconfig"
 920
 921 source "lib/Kconfig"