arch/sh/Kconfig

   1 config SUPERH
   2         def_bool y
   3         select EXPERT
   4         select CLKDEV_LOOKUP
   5         select HAVE_IDE if HAS_IOPORT
   6         select HAVE_MEMBLOCK
   7         select HAVE_MEMBLOCK_NODE_MAP
   8         select ARCH_DISCARD_MEMBLOCK
   9         select HAVE_OPROFILE
  10         select HAVE_GENERIC_DMA_COHERENT
  11         select HAVE_ARCH_TRACEHOOK
  12         select HAVE_DMA_API_DEBUG
  13         select HAVE_DMA_ATTRS
  14         select HAVE_IRQ_WORK
  15         select HAVE_PERF_EVENTS
  16         select ARCH_HAVE_CUSTOM_GPIO_H
  17         select ARCH_HAVE_NMI_SAFE_CMPXCHG if (GUSA_RB || CPU_SH4A)
  18         select PERF_USE_VMALLOC
  19         select HAVE_DEBUG_KMEMLEAK
  20         select HAVE_KERNEL_GZIP
  21         select HAVE_KERNEL_BZIP2
  22         select HAVE_KERNEL_LZMA
  23         select HAVE_KERNEL_XZ
  24         select HAVE_KERNEL_LZO
  25         select HAVE_UID16
  26         select ARCH_WANT_IPC_PARSE_VERSION
  27         select HAVE_SYSCALL_TRACEPOINTS
  28         select HAVE_REGS_AND_STACK_ACCESS_API
  29         select HAVE_GENERIC_HARDIRQS
  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_CLOCKEVENTS
  37         select GENERIC_CMOS_UPDATE if SH_SH03 || SH_DREAMCAST
  38         select GENERIC_STRNCPY_FROM_USER
  39         select GENERIC_STRNLEN_USER
  40         help
  41           The SuperH is a RISC processor targeted for use in embedded systems
  42           and consumer electronics; it was also used in the Sega Dreamcast
  43           gaming console.  The SuperH port has a home page at
  44           <http://www.linux-sh.org/>.
  45
  46 config SUPERH32
  47         def_bool ARCH = "sh"
  48         select HAVE_KPROBES
  49         select HAVE_KRETPROBES
  50         select HAVE_IOREMAP_PROT if MMU && !X2TLB
  51         select HAVE_FUNCTION_TRACER
  52         select HAVE_FTRACE_MCOUNT_RECORD
  53         select HAVE_DYNAMIC_FTRACE
  54         select HAVE_FUNCTION_TRACE_MCOUNT_TEST
  55         select HAVE_FTRACE_NMI_ENTER if DYNAMIC_FTRACE
  56         select ARCH_WANT_IPC_PARSE_VERSION
  57         select HAVE_FUNCTION_GRAPH_TRACER
  58         select HAVE_ARCH_KGDB
  59         select HAVE_HW_BREAKPOINT
  60         select HAVE_MIXED_BREAKPOINTS_REGS
  61         select PERF_EVENTS
  62         select ARCH_HIBERNATION_POSSIBLE if MMU
  63         select SPARSE_IRQ
  64
  65 config SUPERH64
  66         def_bool ARCH = "sh64"
  67         select KALLSYMS
  68
  69 config ARCH_DEFCONFIG
  70         string
  71         default "arch/sh/configs/shx3_defconfig" if SUPERH32
  72         default "arch/sh/configs/cayman_defconfig" if SUPERH64
  73
  74 config RWSEM_GENERIC_SPINLOCK
  75         def_bool y
  76
  77 config RWSEM_XCHGADD_ALGORITHM
  78         bool
  79
  80 config GENERIC_BUG
  81         def_bool y
  82         depends on BUG && SUPERH32
  83
  84 config GENERIC_CSUM
  85         def_bool y
  86         depends on SUPERH64
  87
  88 config GENERIC_HWEIGHT
  89         def_bool y
  90
  91 config IRQ_PER_CPU
  92         def_bool y
  93
  94 config GENERIC_GPIO
  95         def_bool n
  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 ARCH_NO_VIRT_TO_BUS
 151         def_bool y
 152
 153 config ARCH_HAS_DEFAULT_IDLE
 154         def_bool y
 155
 156 config NO_IOPORT
 157         def_bool !PCI
 158         depends on !SH_CAYMAN && !SH_SH4202_MICRODEV && !SH_SHMIN && \
 159                    !SH_HP6XX && !SH_SOLUTION_ENGINE
 160
 161 config IO_TRAPPED
 162         bool
 163
 164 config SWAP_IO_SPACE
 165         bool
 166
 167 config DMA_COHERENT
 168         bool
 169
 170 config DMA_NONCOHERENT
 171         def_bool !DMA_COHERENT
 172
 173 config NEED_DMA_MAP_STATE
 174         def_bool DMA_NONCOHERENT
 175
 176 config NEED_SG_DMA_LENGTH
 177         def_bool y
 178
 179 source "init/Kconfig"
 180
 181 source "kernel/Kconfig.freezer"
 182
 183 menu "System type"
 184
 185 #
 186 # Processor families
 187 #
 188 config CPU_SH2
 189         bool
 190
 191 config CPU_SH2A
 192         bool
 193         select CPU_SH2
 194         select UNCACHED_MAPPING
 195
 196 config CPU_SH3
 197         bool
 198         select CPU_HAS_INTEVT
 199         select CPU_HAS_SR_RB
 200         select SYS_SUPPORTS_TMU
 201
 202 config CPU_SH4
 203         bool
 204         select CPU_HAS_INTEVT
 205         select CPU_HAS_SR_RB
 206         select CPU_HAS_FPU if !CPU_SH4AL_DSP
 207         select SYS_SUPPORTS_TMU
 208         select SYS_SUPPORTS_HUGETLBFS if MMU
 209
 210 config CPU_SH4A
 211         bool
 212         select CPU_SH4
 213
 214 config CPU_SH4AL_DSP
 215         bool
 216         select CPU_SH4A
 217         select CPU_HAS_DSP
 218
 219 config CPU_SH5
 220         bool
 221         select CPU_HAS_FPU
 222         select SYS_SUPPORTS_TMU
 223         select SYS_SUPPORTS_HUGETLBFS if MMU
 224
 225 config CPU_SHX2
 226         bool
 227
 228 config CPU_SHX3
 229         bool
 230         select DMA_COHERENT
 231         select SYS_SUPPORTS_SMP
 232         select SYS_SUPPORTS_NUMA
 233
 234 config ARCH_SHMOBILE
 235         bool
 236         select ARCH_SUSPEND_POSSIBLE
 237         select PM
 238         select PM_RUNTIME
 239
 240 config CPU_HAS_PMU
 241        depends on CPU_SH4 || CPU_SH4A
 242        default y
 243        bool
 244
 245 if SUPERH32
 246
 247 choice
 248         prompt "Processor sub-type selection"
 249
 250 #
 251 # Processor subtypes
 252 #
 253
 254 # SH-2 Processor Support
 255
 256 config CPU_SUBTYPE_SH7619
 257         bool "Support SH7619 processor"
 258         select CPU_SH2
 259         select SYS_SUPPORTS_CMT
 260
 261 # SH-2A Processor Support
 262
 263 config CPU_SUBTYPE_SH7201
 264         bool "Support SH7201 processor"
 265         select CPU_SH2A
 266         select CPU_HAS_FPU
 267         select SYS_SUPPORTS_MTU2
 268
 269 config CPU_SUBTYPE_SH7203
 270         bool "Support SH7203 processor"
 271         select CPU_SH2A
 272         select CPU_HAS_FPU
 273         select SYS_SUPPORTS_CMT
 274         select SYS_SUPPORTS_MTU2
 275         select ARCH_WANT_OPTIONAL_GPIOLIB
 276
 277 config CPU_SUBTYPE_SH7206
 278         bool "Support SH7206 processor"
 279         select CPU_SH2A
 280         select SYS_SUPPORTS_CMT
 281         select SYS_SUPPORTS_MTU2
 282
 283 config CPU_SUBTYPE_SH7263
 284         bool "Support SH7263 processor"
 285         select CPU_SH2A
 286         select CPU_HAS_FPU
 287         select SYS_SUPPORTS_CMT
 288         select SYS_SUPPORTS_MTU2
 289
 290 config CPU_SUBTYPE_SH7264
 291         bool "Support SH7264 processor"
 292         select CPU_SH2A
 293         select CPU_HAS_FPU
 294         select SYS_SUPPORTS_CMT
 295         select SYS_SUPPORTS_MTU2
 296
 297 config CPU_SUBTYPE_SH7269
 298         bool "Support SH7269 processor"
 299         select CPU_SH2A
 300         select CPU_HAS_FPU
 301         select SYS_SUPPORTS_CMT
 302         select SYS_SUPPORTS_MTU2
 303
 304 config CPU_SUBTYPE_MXG
 305         bool "Support MX-G processor"
 306         select CPU_SH2A
 307         select SYS_SUPPORTS_MTU2
 308         help
 309           Select MX-G if running on an R8A03022BG part.
 310
 311 # SH-3 Processor Support
 312
 313 config CPU_SUBTYPE_SH7705
 314         bool "Support SH7705 processor"
 315         select CPU_SH3
 316
 317 config CPU_SUBTYPE_SH7706
 318         bool "Support SH7706 processor"
 319         select CPU_SH3
 320         help
 321           Select SH7706 if you have a 133 Mhz SH-3 HD6417706 CPU.
 322
 323 config CPU_SUBTYPE_SH7707
 324         bool "Support SH7707 processor"
 325         select CPU_SH3
 326         help
 327           Select SH7707 if you have a  60 Mhz SH-3 HD6417707 CPU.
 328
 329 config CPU_SUBTYPE_SH7708
 330         bool "Support SH7708 processor"
 331         select CPU_SH3
 332         help
 333           Select SH7708 if you have a  60 Mhz SH-3 HD6417708S or
 334           if you have a 100 Mhz SH-3 HD6417708R CPU.
 335
 336 config CPU_SUBTYPE_SH7709
 337         bool "Support SH7709 processor"
 338         select CPU_SH3
 339         help
 340           Select SH7709 if you have a  80 Mhz SH-3 HD6417709 CPU.
 341
 342 config CPU_SUBTYPE_SH7710
 343         bool "Support SH7710 processor"
 344         select CPU_SH3
 345         select CPU_HAS_DSP
 346         help
 347           Select SH7710 if you have a SH3-DSP SH7710 CPU.
 348
 349 config CPU_SUBTYPE_SH7712
 350         bool "Support SH7712 processor"
 351         select CPU_SH3
 352         select CPU_HAS_DSP
 353         help
 354           Select SH7712 if you have a SH3-DSP SH7712 CPU.
 355
 356 config CPU_SUBTYPE_SH7720
 357         bool "Support SH7720 processor"
 358         select CPU_SH3
 359         select CPU_HAS_DSP
 360         select SYS_SUPPORTS_CMT
 361         select ARCH_WANT_OPTIONAL_GPIOLIB
 362         select USB_ARCH_HAS_OHCI
 363         select USB_OHCI_SH if USB_OHCI_HCD
 364         help
 365           Select SH7720 if you have a SH3-DSP SH7720 CPU.
 366
 367 config CPU_SUBTYPE_SH7721
 368         bool "Support SH7721 processor"
 369         select CPU_SH3
 370         select CPU_HAS_DSP
 371         select SYS_SUPPORTS_CMT
 372         select USB_ARCH_HAS_OHCI
 373         select USB_OHCI_SH if USB_OHCI_HCD
 374         help
 375           Select SH7721 if you have a SH3-DSP SH7721 CPU.
 376
 377 # SH-4 Processor Support
 378
 379 config CPU_SUBTYPE_SH7750
 380         bool "Support SH7750 processor"
 381         select CPU_SH4
 382         help
 383           Select SH7750 if you have a 200 Mhz SH-4 HD6417750 CPU.
 384
 385 config CPU_SUBTYPE_SH7091
 386         bool "Support SH7091 processor"
 387         select CPU_SH4
 388         help
 389           Select SH7091 if you have an SH-4 based Sega device (such as
 390           the Dreamcast, Naomi, and Naomi 2).
 391
 392 config CPU_SUBTYPE_SH7750R
 393         bool "Support SH7750R processor"
 394         select CPU_SH4
 395
 396 config CPU_SUBTYPE_SH7750S
 397         bool "Support SH7750S processor"
 398         select CPU_SH4
 399
 400 config CPU_SUBTYPE_SH7751
 401         bool "Support SH7751 processor"
 402         select CPU_SH4
 403         help
 404           Select SH7751 if you have a 166 Mhz SH-4 HD6417751 CPU,
 405           or if you have a HD6417751R CPU.
 406
 407 config CPU_SUBTYPE_SH7751R
 408         bool "Support SH7751R processor"
 409         select CPU_SH4
 410
 411 config CPU_SUBTYPE_SH7760
 412         bool "Support SH7760 processor"
 413         select CPU_SH4
 414
 415 config CPU_SUBTYPE_SH4_202
 416         bool "Support SH4-202 processor"
 417         select CPU_SH4
 418
 419 # SH-4A Processor Support
 420
 421 config CPU_SUBTYPE_SH7723
 422         bool "Support SH7723 processor"
 423         select CPU_SH4A
 424         select CPU_SHX2
 425         select ARCH_SHMOBILE
 426         select ARCH_SPARSEMEM_ENABLE
 427         select SYS_SUPPORTS_CMT
 428         select ARCH_WANT_OPTIONAL_GPIOLIB
 429         help
 430           Select SH7723 if you have an SH-MobileR2 CPU.
 431
 432 config CPU_SUBTYPE_SH7724
 433         bool "Support SH7724 processor"
 434         select CPU_SH4A
 435         select CPU_SHX2
 436         select ARCH_SHMOBILE
 437         select ARCH_SPARSEMEM_ENABLE
 438         select SYS_SUPPORTS_CMT
 439         select ARCH_WANT_OPTIONAL_GPIOLIB
 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         help
 451           Select SH7734 if you have a SH4A SH7734 CPU.
 452
 453 config CPU_SUBTYPE_SH7757
 454         bool "Support SH7757 processor"
 455         select CPU_SH4A
 456         select CPU_SHX2
 457         select ARCH_WANT_OPTIONAL_GPIOLIB
 458         select USB_ARCH_HAS_OHCI
 459         select USB_ARCH_HAS_EHCI
 460         help
 461           Select SH7757 if you have a SH4A SH7757 CPU.
 462
 463 config CPU_SUBTYPE_SH7763
 464         bool "Support SH7763 processor"
 465         select CPU_SH4A
 466         select USB_ARCH_HAS_OHCI
 467         select USB_OHCI_SH if USB_OHCI_HCD
 468         help
 469           Select SH7763 if you have a SH4A SH7763(R5S77631) CPU.
 470
 471 config CPU_SUBTYPE_SH7770
 472         bool "Support SH7770 processor"
 473         select CPU_SH4A
 474
 475 config CPU_SUBTYPE_SH7780
 476         bool "Support SH7780 processor"
 477         select CPU_SH4A
 478
 479 config CPU_SUBTYPE_SH7785
 480         bool "Support SH7785 processor"
 481         select CPU_SH4A
 482         select CPU_SHX2
 483         select ARCH_SPARSEMEM_ENABLE
 484         select SYS_SUPPORTS_NUMA
 485         select ARCH_WANT_OPTIONAL_GPIOLIB
 486
 487 config CPU_SUBTYPE_SH7786
 488         bool "Support SH7786 processor"
 489         select CPU_SH4A
 490         select CPU_SHX3
 491         select CPU_HAS_PTEAEX
 492         select GENERIC_CLOCKEVENTS_BROADCAST if SMP
 493         select ARCH_WANT_OPTIONAL_GPIOLIB
 494         select USB_ARCH_HAS_OHCI
 495         select USB_OHCI_SH if USB_OHCI_HCD
 496         select USB_ARCH_HAS_EHCI
 497         select USB_EHCI_SH if USB_EHCI_HCD
 498
 499 config CPU_SUBTYPE_SHX3
 500         bool "Support SH-X3 processor"
 501         select CPU_SH4A
 502         select CPU_SHX3
 503         select GENERIC_CLOCKEVENTS_BROADCAST if SMP
 504         select ARCH_REQUIRE_GPIOLIB
 505
 506 # SH4AL-DSP Processor Support
 507
 508 config CPU_SUBTYPE_SH7343
 509         bool "Support SH7343 processor"
 510         select CPU_SH4AL_DSP
 511         select ARCH_SHMOBILE
 512         select SYS_SUPPORTS_CMT
 513
 514 config CPU_SUBTYPE_SH7722
 515         bool "Support SH7722 processor"
 516         select CPU_SH4AL_DSP
 517         select CPU_SHX2
 518         select ARCH_SHMOBILE
 519         select ARCH_SPARSEMEM_ENABLE
 520         select SYS_SUPPORTS_NUMA
 521         select SYS_SUPPORTS_CMT
 522         select ARCH_WANT_OPTIONAL_GPIOLIB
 523
 524 config CPU_SUBTYPE_SH7366
 525         bool "Support SH7366 processor"
 526         select CPU_SH4AL_DSP
 527         select CPU_SHX2
 528         select ARCH_SHMOBILE
 529         select ARCH_SPARSEMEM_ENABLE
 530         select SYS_SUPPORTS_NUMA
 531         select SYS_SUPPORTS_CMT
 532
 533 endchoice
 534
 535 endif
 536
 537 if SUPERH64
 538
 539 choice
 540         prompt "Processor sub-type selection"
 541
 542 # SH-5 Processor Support
 543
 544 config CPU_SUBTYPE_SH5_101
 545         bool "Support SH5-101 processor"
 546         select CPU_SH5
 547
 548 config CPU_SUBTYPE_SH5_103
 549         bool "Support SH5-103 processor"
 550         select CPU_SH5
 551
 552 endchoice
 553
 554 endif
 555
 556 source "arch/sh/mm/Kconfig"
 557
 558 source "arch/sh/Kconfig.cpu"
 559
 560 source "arch/sh/boards/Kconfig"
 561
 562 menu "Timer and clock configuration"
 563
 564 config SH_TIMER_TMU
 565         bool "TMU timer driver"
 566         depends on SYS_SUPPORTS_TMU
 567         default y
 568         help
 569           This enables the build of the TMU timer driver.
 570
 571 config SH_TIMER_CMT
 572         bool "CMT timer driver"
 573         depends on SYS_SUPPORTS_CMT
 574         default y
 575         help
 576           This enables build of the CMT timer driver.
 577
 578 config SH_TIMER_MTU2
 579         bool "MTU2 timer driver"
 580         depends on SYS_SUPPORTS_MTU2
 581         default y
 582         help
 583           This enables build of the MTU2 timer driver.
 584
 585 config SH_PCLK_FREQ
 586         int "Peripheral clock frequency (in Hz)"
 587         depends on SH_CLK_CPG_LEGACY
 588         default "31250000" if CPU_SUBTYPE_SH7619
 589         default "33333333" if CPU_SUBTYPE_SH7770 || \
 590                               CPU_SUBTYPE_SH7760 || \
 591                               CPU_SUBTYPE_SH7705 || \
 592                               CPU_SUBTYPE_SH7203 || \
 593                               CPU_SUBTYPE_SH7206 || \
 594                               CPU_SUBTYPE_SH7263 || \
 595                               CPU_SUBTYPE_MXG
 596         default "60000000" if CPU_SUBTYPE_SH7751 || CPU_SUBTYPE_SH7751R
 597         default "66000000" if CPU_SUBTYPE_SH4_202
 598         default "50000000"
 599         help
 600           This option is used to specify the peripheral clock frequency.
 601           This is necessary for determining the reference clock value on
 602           platforms lacking an RTC.
 603
 604 config SH_CLK_CPG
 605         def_bool y
 606
 607 config SH_CLK_CPG_LEGACY
 608         depends on SH_CLK_CPG
 609         def_bool y if !CPU_SUBTYPE_SH7785 && !ARCH_SHMOBILE && \
 610                       !CPU_SHX3 && !CPU_SUBTYPE_SH7757 && \
 611                       !CPU_SUBTYPE_SH7734 && !CPU_SUBTYPE_SH7264 && \
 612                       !CPU_SUBTYPE_SH7269
 613
 614 endmenu
 615
 616 menu "CPU Frequency scaling"
 617
 618 source "drivers/cpufreq/Kconfig"
 619
 620 config SH_CPU_FREQ
 621         tristate "SuperH CPU Frequency driver"
 622         depends on CPU_FREQ
 623         select CPU_FREQ_TABLE
 624         help
 625           This adds the cpufreq driver for SuperH. Any CPU that supports
 626           clock rate rounding through the clock framework can use this
 627           driver. While it will make the kernel slightly larger, this is
 628           harmless for CPUs that don't support rate rounding. The driver
 629           will also generate a notice in the boot log before disabling
 630           itself if the CPU in question is not capable of rate rounding.
 631
 632           For details, take a look at <file:Documentation/cpu-freq>.
 633
 634           If unsure, say N.
 635
 636 endmenu
 637
 638 source "arch/sh/drivers/Kconfig"
 639
 640 endmenu
 641
 642 menu "Kernel features"
 643
 644 source kernel/Kconfig.hz
 645
 646 config KEXEC
 647         bool "kexec system call (EXPERIMENTAL)"
 648         depends on SUPERH32 && EXPERIMENTAL && MMU
 649         help
 650           kexec is a system call that implements the ability to shutdown your
 651           current kernel, and to start another kernel.  It is like a reboot
 652           but it is independent of the system firmware.  And like a reboot
 653           you can start any kernel with it, not just Linux.
 654
 655           The name comes from the similarity to the exec system call.
 656
 657           It is an ongoing process to be certain the hardware in a machine
 658           is properly shutdown, so do not be surprised if this code does not
 659           initially work for you.  It may help to enable device hotplugging
 660           support.  As of this writing the exact hardware interface is
 661           strongly in flux, so no good recommendation can be made.
 662
 663 config CRASH_DUMP
 664         bool "kernel crash dumps (EXPERIMENTAL)"
 665         depends on SUPERH32 && EXPERIMENTAL && BROKEN_ON_SMP
 666         help
 667           Generate crash dump after being started by kexec.
 668           This should be normally only set in special crash dump kernels
 669           which are loaded in the main kernel with kexec-tools into
 670           a specially reserved region and then later executed after
 671           a crash by kdump/kexec. The crash dump kernel must be compiled
 672           to a memory address not used by the main kernel using
 673           PHYSICAL_START.
 674
 675           For more details see Documentation/kdump/kdump.txt
 676
 677 config KEXEC_JUMP
 678         bool "kexec jump (EXPERIMENTAL)"
 679         depends on SUPERH32 && KEXEC && HIBERNATION && EXPERIMENTAL
 680         help
 681           Jump between original kernel and kexeced kernel and invoke
 682           code via KEXEC
 683
 684 config PHYSICAL_START
 685         hex "Physical address where the kernel is loaded" if (EXPERT || CRASH_DUMP)
 686         default MEMORY_START
 687         ---help---
 688           This gives the physical address where the kernel is loaded
 689           and is ordinarily the same as MEMORY_START.
 690
 691           Different values are primarily used in the case of kexec on panic
 692           where the fail safe kernel needs to run at a different address
 693           than the panic-ed kernel.
 694
 695 config SECCOMP
 696         bool "Enable seccomp to safely compute untrusted bytecode"
 697         depends on PROC_FS
 698         help
 699           This kernel feature is useful for number crunching applications
 700           that may need to compute untrusted bytecode during their
 701           execution. By using pipes or other transports made available to
 702           the process as file descriptors supporting the read/write
 703           syscalls, it's possible to isolate those applications in
 704           their own address space using seccomp. Once seccomp is
 705           enabled via prctl, it cannot be disabled and the task is only
 706           allowed to execute a few safe syscalls defined by each seccomp
 707           mode.
 708
 709           If unsure, say N.
 710
 711 config CC_STACKPROTECTOR
 712         bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
 713         depends on SUPERH32 && EXPERIMENTAL
 714         help
 715           This option turns on the -fstack-protector GCC feature. This
 716           feature puts, at the beginning of functions, a canary value on
 717           the stack just before the return address, and validates
 718           the value just before actually returning.  Stack based buffer
 719           overflows (that need to overwrite this return address) now also
 720           overwrite the canary, which gets detected and the attack is then
 721           neutralized via a kernel panic.
 722
 723           This feature requires gcc version 4.2 or above.
 724
 725 config SMP
 726         bool "Symmetric multi-processing support"
 727         depends on SYS_SUPPORTS_SMP
 728         select USE_GENERIC_SMP_HELPERS
 729         ---help---
 730           This enables support for systems with more than one CPU. If you have
 731           a system with only one CPU, like most personal computers, say N. If
 732           you have a system with more than one CPU, say Y.
 733
 734           If you say N here, the kernel will run on single and multiprocessor
 735           machines, but will use only one CPU of a multiprocessor machine. If
 736           you say Y here, the kernel will run on many, but not all,
 737           singleprocessor machines. On a singleprocessor machine, the kernel
 738           will run faster if you say N here.
 739
 740           People using multiprocessor machines who say Y here should also say
 741           Y to "Enhanced Real Time Clock Support", below.
 742
 743           See also <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO
 744           available at <http://www.tldp.org/docs.html#howto>.
 745
 746           If you don't know what to do here, say N.
 747
 748 config NR_CPUS
 749         int "Maximum number of CPUs (2-32)"
 750         range 2 32
 751         depends on SMP
 752         default "4" if CPU_SUBTYPE_SHX3
 753         default "2"
 754         help
 755           This allows you to specify the maximum number of CPUs which this
 756           kernel will support.  The maximum supported value is 32 and the
 757           minimum value which makes sense is 2.
 758
 759           This is purely to save memory - each supported CPU adds
 760           approximately eight kilobytes to the kernel image.
 761
 762 config HOTPLUG_CPU
 763         bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
 764         depends on SMP && HOTPLUG && EXPERIMENTAL
 765         help
 766           Say Y here to experiment with turning CPUs off and on.  CPUs
 767           can be controlled through /sys/devices/system/cpu.
 768
 769 source "kernel/Kconfig.preempt"
 770
 771 config GUSA
 772         def_bool y
 773         depends on !SMP && SUPERH32
 774         help
 775           This enables support for gUSA (general UserSpace Atomicity).
 776           This is the default implementation for both UP and non-ll/sc
 777           CPUs, and is used by the libc, amongst others.
 778
 779           For additional information, design information can be found
 780           in <http://lc.linux.or.jp/lc2002/papers/niibe0919p.pdf>.
 781
 782           This should only be disabled for special cases where alternate
 783           atomicity implementations exist.
 784
 785 config GUSA_RB
 786         bool "Implement atomic operations by roll-back (gRB) (EXPERIMENTAL)"
 787         depends on GUSA && CPU_SH3 || (CPU_SH4 && !CPU_SH4A)
 788         help
 789           Enabling this option will allow the kernel to implement some
 790           atomic operations using a software implementation of load-locked/
 791           store-conditional (LLSC). On machines which do not have hardware
 792           LLSC, this should be more efficient than the other alternative of
 793           disabling interrupts around the atomic sequence.
 794
 795 config HW_PERF_EVENTS
 796         bool "Enable hardware performance counter support for perf events"
 797         depends on PERF_EVENTS && CPU_HAS_PMU
 798         default y
 799         help
 800           Enable hardware performance counter support for perf events. If
 801           disabled, perf events will use software events only.
 802
 803 source "drivers/sh/Kconfig"
 804
 805 endmenu
 806
 807 menu "Boot options"
 808
 809 config ZERO_PAGE_OFFSET
 810         hex
 811         default "0x00010000" if PAGE_SIZE_64KB || SH_RTS7751R2D || \
 812                                 SH_7751_SOLUTION_ENGINE
 813         default "0x00004000" if PAGE_SIZE_16KB || SH_SH03
 814         default "0x00002000" if PAGE_SIZE_8KB
 815         default "0x00001000"
 816         help
 817           This sets the default offset of zero page.
 818
 819 config BOOT_LINK_OFFSET
 820         hex
 821         default "0x00210000" if SH_SHMIN
 822         default "0x00400000" if SH_CAYMAN
 823         default "0x00810000" if SH_7780_SOLUTION_ENGINE
 824         default "0x009e0000" if SH_TITAN
 825         default "0x01800000" if SH_SDK7780
 826         default "0x02000000" if SH_EDOSK7760
 827         default "0x00800000"
 828         help
 829           This option allows you to set the link address offset of the zImage.
 830           This can be useful if you are on a board which has a small amount of
 831           memory.
 832
 833 config ENTRY_OFFSET
 834         hex
 835         default "0x00001000" if PAGE_SIZE_4KB
 836         default "0x00002000" if PAGE_SIZE_8KB
 837         default "0x00004000" if PAGE_SIZE_16KB
 838         default "0x00010000" if PAGE_SIZE_64KB
 839         default "0x00000000"
 840
 841 config ROMIMAGE_MMCIF
 842         bool "Include MMCIF loader in romImage (EXPERIMENTAL)"
 843         depends on CPU_SUBTYPE_SH7724 && EXPERIMENTAL
 844         help
 845           Say Y here to include experimental MMCIF loading code in
 846           romImage. With this enabled it is possible to write the romImage
 847           kernel image to an MMC card and boot the kernel straight from
 848           the reset vector. At reset the processor Mask ROM will load the
 849           first part of the romImage which in turn loads the rest the kernel
 850           image to RAM using the MMCIF hardware block.
 851
 852 choice
 853         prompt "Kernel command line"
 854         optional
 855         default CMDLINE_OVERWRITE
 856         help
 857           Setting this option allows the kernel command line arguments
 858           to be set.
 859
 860 config CMDLINE_OVERWRITE
 861         bool "Overwrite bootloader kernel arguments"
 862         help
 863           Given string will overwrite any arguments passed in by
 864           a bootloader.
 865
 866 config CMDLINE_EXTEND
 867         bool "Extend bootloader kernel arguments"
 868         help
 869           Given string will be concatenated with arguments passed in
 870           by a bootloader.
 871
 872 endchoice
 873
 874 config CMDLINE
 875         string "Kernel command line arguments string"
 876         depends on CMDLINE_OVERWRITE || CMDLINE_EXTEND
 877         default "console=ttySC1,115200"
 878
 879 endmenu
 880
 881 menu "Bus options"
 882
 883 config SUPERHYWAY
 884         tristate "SuperHyway Bus support"
 885         depends on CPU_SUBTYPE_SH4_202
 886
 887 config MAPLE
 888         bool "Maple Bus support"
 889         depends on SH_DREAMCAST
 890         help
 891          The Maple Bus is SEGA's serial communication bus for peripherals
 892          on the Dreamcast. Without this bus support you won't be able to
 893          get your Dreamcast keyboard etc to work, so most users
 894          probably want to say 'Y' here, unless you are only using the
 895          Dreamcast with a serial line terminal or a remote network
 896          connection.
 897
 898 config PCI
 899         bool "PCI support"
 900         depends on SYS_SUPPORTS_PCI
 901         select PCI_DOMAINS
 902         select GENERIC_PCI_IOMAP
 903         select NO_GENERIC_PCI_IOPORT_MAP
 904         help
 905           Find out whether you have a PCI motherboard. PCI is the name of a
 906           bus system, i.e. the way the CPU talks to the other stuff inside
 907           your box. If you have PCI, say Y, otherwise N.
 908
 909 config PCI_DOMAINS
 910         bool
 911
 912 source "drivers/pci/pcie/Kconfig"
 913
 914 source "drivers/pci/Kconfig"
 915
 916 source "drivers/pcmcia/Kconfig"
 917
 918 source "drivers/pci/hotplug/Kconfig"
 919
 920 endmenu
 921
 922 menu "Executable file formats"
 923
 924 source "fs/Kconfig.binfmt"
 925
 926 endmenu
 927
 928 menu "Power management options (EXPERIMENTAL)"
 929 depends on EXPERIMENTAL
 930
 931 source "kernel/power/Kconfig"
 932
 933 source "drivers/cpuidle/Kconfig"
 934
 935 endmenu
 936
 937 source "net/Kconfig"
 938
 939 source "drivers/Kconfig"
 940
 941 source "fs/Kconfig"
 942
 943 source "arch/sh/Kconfig.debug"
 944
 945 source "security/Kconfig"
 946
 947 source "crypto/Kconfig"
 948
 949 source "lib/Kconfig"