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_KERNEL_GZIP
  20         select HAVE_KERNEL_BZIP2
  21         select HAVE_KERNEL_LZMA
  22         select HAVE_KERNEL_XZ
  23         select HAVE_KERNEL_LZO
  24         select HAVE_SYSCALL_TRACEPOINTS
  25         select HAVE_REGS_AND_STACK_ACCESS_API
  26         select HAVE_GENERIC_HARDIRQS
  27         select MAY_HAVE_SPARSE_IRQ
  28         select IRQ_FORCED_THREADING
  29         select RTC_LIB
  30         select GENERIC_ATOMIC64
  31         select GENERIC_IRQ_SHOW
  32         select GENERIC_SMP_IDLE_THREAD
  33         select GENERIC_CLOCKEVENTS
  34         select GENERIC_CMOS_UPDATE if SH_SH03 || SH_DREAMCAST
  35         help
  36           The SuperH is a RISC processor targeted for use in embedded systems
  37           and consumer electronics; it was also used in the Sega Dreamcast
  38           gaming console.  The SuperH port has a home page at
  39           <http://www.linux-sh.org/>.
  40
  41 config SUPERH32
  42         def_bool ARCH = "sh"
  43         select HAVE_KPROBES
  44         select HAVE_KRETPROBES
  45         select HAVE_IOREMAP_PROT if MMU && !X2TLB
  46         select HAVE_FUNCTION_TRACER
  47         select HAVE_FTRACE_MCOUNT_RECORD
  48         select HAVE_DYNAMIC_FTRACE
  49         select HAVE_FUNCTION_TRACE_MCOUNT_TEST
  50         select HAVE_FTRACE_NMI_ENTER if DYNAMIC_FTRACE
  51         select HAVE_FUNCTION_GRAPH_TRACER
  52         select HAVE_ARCH_KGDB
  53         select HAVE_HW_BREAKPOINT
  54         select HAVE_MIXED_BREAKPOINTS_REGS
  55         select PERF_EVENTS
  56         select ARCH_HIBERNATION_POSSIBLE if MMU
  57         select SPARSE_IRQ
  58
  59 config SUPERH64
  60         def_bool ARCH = "sh64"
  61
  62 config ARCH_DEFCONFIG
  63         string
  64         default "arch/sh/configs/shx3_defconfig" if SUPERH32
  65         default "arch/sh/configs/cayman_defconfig" if SUPERH64
  66
  67 config RWSEM_GENERIC_SPINLOCK
  68         def_bool y
  69
  70 config RWSEM_XCHGADD_ALGORITHM
  71         bool
  72
  73 config GENERIC_BUG
  74         def_bool y
  75         depends on BUG && SUPERH32
  76
  77 config GENERIC_CSUM
  78         def_bool y
  79         depends on SUPERH64
  80
  81 config GENERIC_HWEIGHT
  82         def_bool y
  83
  84 config IRQ_PER_CPU
  85         def_bool y
  86
  87 config GENERIC_GPIO
  88         def_bool n
  89
  90 config GENERIC_CALIBRATE_DELAY
  91         bool
  92
  93 config GENERIC_LOCKBREAK
  94         def_bool y
  95         depends on SMP && PREEMPT
  96
  97 config ARCH_SUSPEND_POSSIBLE
  98         def_bool n
  99
 100 config ARCH_HIBERNATION_POSSIBLE
 101         def_bool n
 102
 103 config SYS_SUPPORTS_APM_EMULATION
 104         bool
 105         select ARCH_SUSPEND_POSSIBLE
 106
 107 config SYS_SUPPORTS_HUGETLBFS
 108         bool
 109
 110 config SYS_SUPPORTS_SMP
 111         bool
 112
 113 config SYS_SUPPORTS_NUMA
 114         bool
 115
 116 config SYS_SUPPORTS_PCI
 117         bool
 118
 119 config SYS_SUPPORTS_CMT
 120         bool
 121
 122 config SYS_SUPPORTS_MTU2
 123         bool
 124
 125 config SYS_SUPPORTS_TMU
 126         bool
 127
 128 config STACKTRACE_SUPPORT
 129         def_bool y
 130
 131 config LOCKDEP_SUPPORT
 132         def_bool y
 133
 134 config HAVE_LATENCYTOP_SUPPORT
 135         def_bool y
 136
 137 config ARCH_HAS_ILOG2_U32
 138         def_bool n
 139
 140 config ARCH_HAS_ILOG2_U64
 141         def_bool n
 142
 143 config ARCH_NO_VIRT_TO_BUS
 144         def_bool y
 145
 146 config ARCH_HAS_DEFAULT_IDLE
 147         def_bool y
 148
 149 config NO_IOPORT
 150         def_bool !PCI
 151         depends on !SH_CAYMAN && !SH_SH4202_MICRODEV && !SH_SHMIN && \
 152                    !SH_HP6XX && !SH_SOLUTION_ENGINE
 153
 154 config IO_TRAPPED
 155         bool
 156
 157 config SWAP_IO_SPACE
 158         bool
 159
 160 config DMA_COHERENT
 161         bool
 162
 163 config DMA_NONCOHERENT
 164         def_bool !DMA_COHERENT
 165
 166 config NEED_DMA_MAP_STATE
 167         def_bool DMA_NONCOHERENT
 168
 169 config NEED_SG_DMA_LENGTH
 170         def_bool y
 171
 172 source "init/Kconfig"
 173
 174 source "kernel/Kconfig.freezer"
 175
 176 menu "System type"
 177
 178 #
 179 # Processor families
 180 #
 181 config CPU_SH2
 182         bool
 183
 184 config CPU_SH2A
 185         bool
 186         select CPU_SH2
 187         select UNCACHED_MAPPING
 188
 189 config CPU_SH3
 190         bool
 191         select CPU_HAS_INTEVT
 192         select CPU_HAS_SR_RB
 193         select SYS_SUPPORTS_TMU
 194
 195 config CPU_SH4
 196         bool
 197         select CPU_HAS_INTEVT
 198         select CPU_HAS_SR_RB
 199         select CPU_HAS_FPU if !CPU_SH4AL_DSP
 200         select SYS_SUPPORTS_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_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         select PM_RUNTIME
 232
 233 config CPU_HAS_PMU
 234        depends on CPU_SH4 || CPU_SH4A
 235        default y
 236        bool
 237
 238 if SUPERH32
 239
 240 choice
 241         prompt "Processor sub-type selection"
 242
 243 #
 244 # Processor subtypes
 245 #
 246
 247 # SH-2 Processor Support
 248
 249 config CPU_SUBTYPE_SH7619
 250         bool "Support SH7619 processor"
 251         select CPU_SH2
 252         select SYS_SUPPORTS_CMT
 253
 254 # SH-2A Processor Support
 255
 256 config CPU_SUBTYPE_SH7201
 257         bool "Support SH7201 processor"
 258         select CPU_SH2A
 259         select CPU_HAS_FPU
 260         select SYS_SUPPORTS_MTU2
 261
 262 config CPU_SUBTYPE_SH7203
 263         bool "Support SH7203 processor"
 264         select CPU_SH2A
 265         select CPU_HAS_FPU
 266         select SYS_SUPPORTS_CMT
 267         select SYS_SUPPORTS_MTU2
 268         select ARCH_WANT_OPTIONAL_GPIOLIB
 269
 270 config CPU_SUBTYPE_SH7206
 271         bool "Support SH7206 processor"
 272         select CPU_SH2A
 273         select SYS_SUPPORTS_CMT
 274         select SYS_SUPPORTS_MTU2
 275
 276 config CPU_SUBTYPE_SH7263
 277         bool "Support SH7263 processor"
 278         select CPU_SH2A
 279         select CPU_HAS_FPU
 280         select SYS_SUPPORTS_CMT
 281         select SYS_SUPPORTS_MTU2
 282
 283 config CPU_SUBTYPE_SH7264
 284         bool "Support SH7264 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_SH7269
 291         bool "Support SH7269 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_MXG
 298         bool "Support MX-G processor"
 299         select CPU_SH2A
 300         select SYS_SUPPORTS_MTU2
 301         help
 302           Select MX-G if running on an R8A03022BG part.
 303
 304 # SH-3 Processor Support
 305
 306 config CPU_SUBTYPE_SH7705
 307         bool "Support SH7705 processor"
 308         select CPU_SH3
 309
 310 config CPU_SUBTYPE_SH7706
 311         bool "Support SH7706 processor"
 312         select CPU_SH3
 313         help
 314           Select SH7706 if you have a 133 Mhz SH-3 HD6417706 CPU.
 315
 316 config CPU_SUBTYPE_SH7707
 317         bool "Support SH7707 processor"
 318         select CPU_SH3
 319         help
 320           Select SH7707 if you have a  60 Mhz SH-3 HD6417707 CPU.
 321
 322 config CPU_SUBTYPE_SH7708
 323         bool "Support SH7708 processor"
 324         select CPU_SH3
 325         help
 326           Select SH7708 if you have a  60 Mhz SH-3 HD6417708S or
 327           if you have a 100 Mhz SH-3 HD6417708R CPU.
 328
 329 config CPU_SUBTYPE_SH7709
 330         bool "Support SH7709 processor"
 331         select CPU_SH3
 332         help
 333           Select SH7709 if you have a  80 Mhz SH-3 HD6417709 CPU.
 334
 335 config CPU_SUBTYPE_SH7710
 336         bool "Support SH7710 processor"
 337         select CPU_SH3
 338         select CPU_HAS_DSP
 339         help
 340           Select SH7710 if you have a SH3-DSP SH7710 CPU.
 341
 342 config CPU_SUBTYPE_SH7712
 343         bool "Support SH7712 processor"
 344         select CPU_SH3
 345         select CPU_HAS_DSP
 346         help
 347           Select SH7712 if you have a SH3-DSP SH7712 CPU.
 348
 349 config CPU_SUBTYPE_SH7720
 350         bool "Support SH7720 processor"
 351         select CPU_SH3
 352         select CPU_HAS_DSP
 353         select SYS_SUPPORTS_CMT
 354         select ARCH_WANT_OPTIONAL_GPIOLIB
 355         select USB_ARCH_HAS_OHCI
 356         select USB_OHCI_SH if USB_OHCI_HCD
 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_CMT
 365         select USB_ARCH_HAS_OHCI
 366         select USB_OHCI_SH if USB_OHCI_HCD
 367         help
 368           Select SH7721 if you have a SH3-DSP SH7721 CPU.
 369
 370 # SH-4 Processor Support
 371
 372 config CPU_SUBTYPE_SH7750
 373         bool "Support SH7750 processor"
 374         select CPU_SH4
 375         help
 376           Select SH7750 if you have a 200 Mhz SH-4 HD6417750 CPU.
 377
 378 config CPU_SUBTYPE_SH7091
 379         bool "Support SH7091 processor"
 380         select CPU_SH4
 381         help
 382           Select SH7091 if you have an SH-4 based Sega device (such as
 383           the Dreamcast, Naomi, and Naomi 2).
 384
 385 config CPU_SUBTYPE_SH7750R
 386         bool "Support SH7750R processor"
 387         select CPU_SH4
 388
 389 config CPU_SUBTYPE_SH7750S
 390         bool "Support SH7750S processor"
 391         select CPU_SH4
 392
 393 config CPU_SUBTYPE_SH7751
 394         bool "Support SH7751 processor"
 395         select CPU_SH4
 396         help
 397           Select SH7751 if you have a 166 Mhz SH-4 HD6417751 CPU,
 398           or if you have a HD6417751R CPU.
 399
 400 config CPU_SUBTYPE_SH7751R
 401         bool "Support SH7751R processor"
 402         select CPU_SH4
 403
 404 config CPU_SUBTYPE_SH7760
 405         bool "Support SH7760 processor"
 406         select CPU_SH4
 407
 408 config CPU_SUBTYPE_SH4_202
 409         bool "Support SH4-202 processor"
 410         select CPU_SH4
 411
 412 # SH-4A Processor Support
 413
 414 config CPU_SUBTYPE_SH7723
 415         bool "Support SH7723 processor"
 416         select CPU_SH4A
 417         select CPU_SHX2
 418         select ARCH_SHMOBILE
 419         select ARCH_SPARSEMEM_ENABLE
 420         select SYS_SUPPORTS_CMT
 421         select ARCH_WANT_OPTIONAL_GPIOLIB
 422         help
 423           Select SH7723 if you have an SH-MobileR2 CPU.
 424
 425 config CPU_SUBTYPE_SH7724
 426         bool "Support SH7724 processor"
 427         select CPU_SH4A
 428         select CPU_SHX2
 429         select ARCH_SHMOBILE
 430         select ARCH_SPARSEMEM_ENABLE
 431         select SYS_SUPPORTS_CMT
 432         select ARCH_WANT_OPTIONAL_GPIOLIB
 433         help
 434           Select SH7724 if you have an SH-MobileR2R CPU.
 435
 436 config CPU_SUBTYPE_SH7734
 437         bool "Support SH7734 processor"
 438         select CPU_SH4A
 439         select CPU_SHX2
 440         select ARCH_WANT_OPTIONAL_GPIOLIB
 441         select USB_ARCH_HAS_OHCI
 442         select USB_ARCH_HAS_EHCI
 443         help
 444           Select SH7734 if you have a SH4A SH7734 CPU.
 445
 446 config CPU_SUBTYPE_SH7757
 447         bool "Support SH7757 processor"
 448         select CPU_SH4A
 449         select CPU_SHX2
 450         select ARCH_WANT_OPTIONAL_GPIOLIB
 451         select USB_ARCH_HAS_OHCI
 452         select USB_ARCH_HAS_EHCI
 453         help
 454           Select SH7757 if you have a SH4A SH7757 CPU.
 455
 456 config CPU_SUBTYPE_SH7763
 457         bool "Support SH7763 processor"
 458         select CPU_SH4A
 459         select USB_ARCH_HAS_OHCI
 460         select USB_OHCI_SH if USB_OHCI_HCD
 461         help
 462           Select SH7763 if you have a SH4A SH7763(R5S77631) CPU.
 463
 464 config CPU_SUBTYPE_SH7770
 465         bool "Support SH7770 processor"
 466         select CPU_SH4A
 467
 468 config CPU_SUBTYPE_SH7780
 469         bool "Support SH7780 processor"
 470         select CPU_SH4A
 471
 472 config CPU_SUBTYPE_SH7785
 473         bool "Support SH7785 processor"
 474         select CPU_SH4A
 475         select CPU_SHX2
 476         select ARCH_SPARSEMEM_ENABLE
 477         select SYS_SUPPORTS_NUMA
 478         select ARCH_WANT_OPTIONAL_GPIOLIB
 479
 480 config CPU_SUBTYPE_SH7786
 481         bool "Support SH7786 processor"
 482         select CPU_SH4A
 483         select CPU_SHX3
 484         select CPU_HAS_PTEAEX
 485         select GENERIC_CLOCKEVENTS_BROADCAST if SMP
 486         select ARCH_WANT_OPTIONAL_GPIOLIB
 487         select USB_ARCH_HAS_OHCI
 488         select USB_OHCI_SH if USB_OHCI_HCD
 489         select USB_ARCH_HAS_EHCI
 490         select USB_EHCI_SH if USB_EHCI_HCD
 491
 492 config CPU_SUBTYPE_SHX3
 493         bool "Support SH-X3 processor"
 494         select CPU_SH4A
 495         select CPU_SHX3
 496         select GENERIC_CLOCKEVENTS_BROADCAST if SMP
 497         select ARCH_REQUIRE_GPIOLIB
 498
 499 # SH4AL-DSP Processor Support
 500
 501 config CPU_SUBTYPE_SH7343
 502         bool "Support SH7343 processor"
 503         select CPU_SH4AL_DSP
 504         select ARCH_SHMOBILE
 505         select SYS_SUPPORTS_CMT
 506
 507 config CPU_SUBTYPE_SH7722
 508         bool "Support SH7722 processor"
 509         select CPU_SH4AL_DSP
 510         select CPU_SHX2
 511         select ARCH_SHMOBILE
 512         select ARCH_SPARSEMEM_ENABLE
 513         select SYS_SUPPORTS_NUMA
 514         select SYS_SUPPORTS_CMT
 515         select ARCH_WANT_OPTIONAL_GPIOLIB
 516
 517 config CPU_SUBTYPE_SH7366
 518         bool "Support SH7366 processor"
 519         select CPU_SH4AL_DSP
 520         select CPU_SHX2
 521         select ARCH_SHMOBILE
 522         select ARCH_SPARSEMEM_ENABLE
 523         select SYS_SUPPORTS_NUMA
 524         select SYS_SUPPORTS_CMT
 525
 526 endchoice
 527
 528 endif
 529
 530 if SUPERH64
 531
 532 choice
 533         prompt "Processor sub-type selection"
 534
 535 # SH-5 Processor Support
 536
 537 config CPU_SUBTYPE_SH5_101
 538         bool "Support SH5-101 processor"
 539         select CPU_SH5
 540
 541 config CPU_SUBTYPE_SH5_103
 542         bool "Support SH5-103 processor"
 543         select CPU_SH5
 544
 545 endchoice
 546
 547 endif
 548
 549 source "arch/sh/mm/Kconfig"
 550
 551 source "arch/sh/Kconfig.cpu"
 552
 553 source "arch/sh/boards/Kconfig"
 554
 555 menu "Timer and clock configuration"
 556
 557 config SH_TIMER_TMU
 558         bool "TMU timer driver"
 559         depends on SYS_SUPPORTS_TMU
 560         default y
 561         help
 562           This enables the build of the TMU timer driver.
 563
 564 config SH_TIMER_CMT
 565         bool "CMT timer driver"
 566         depends on SYS_SUPPORTS_CMT
 567         default y
 568         help
 569           This enables build of the CMT timer driver.
 570
 571 config SH_TIMER_MTU2
 572         bool "MTU2 timer driver"
 573         depends on SYS_SUPPORTS_MTU2
 574         default y
 575         help
 576           This enables build of the MTU2 timer driver.
 577
 578 config SH_PCLK_FREQ
 579         int "Peripheral clock frequency (in Hz)"
 580         depends on SH_CLK_CPG_LEGACY
 581         default "31250000" if CPU_SUBTYPE_SH7619
 582         default "33333333" if CPU_SUBTYPE_SH7770 || \
 583                               CPU_SUBTYPE_SH7760 || \
 584                               CPU_SUBTYPE_SH7705 || \
 585                               CPU_SUBTYPE_SH7203 || \
 586                               CPU_SUBTYPE_SH7206 || \
 587                               CPU_SUBTYPE_SH7263 || \
 588                               CPU_SUBTYPE_MXG
 589         default "60000000" if CPU_SUBTYPE_SH7751 || CPU_SUBTYPE_SH7751R
 590         default "66000000" if CPU_SUBTYPE_SH4_202
 591         default "50000000"
 592         help
 593           This option is used to specify the peripheral clock frequency.
 594           This is necessary for determining the reference clock value on
 595           platforms lacking an RTC.
 596
 597 config SH_CLK_CPG
 598         def_bool y
 599
 600 config SH_CLK_CPG_LEGACY
 601         depends on SH_CLK_CPG
 602         def_bool y if !CPU_SUBTYPE_SH7785 && !ARCH_SHMOBILE && \
 603                       !CPU_SHX3 && !CPU_SUBTYPE_SH7757 && \
 604                       !CPU_SUBTYPE_SH7734 && !CPU_SUBTYPE_SH7264 && \
 605                       !CPU_SUBTYPE_SH7269
 606
 607 endmenu
 608
 609 menu "CPU Frequency scaling"
 610
 611 source "drivers/cpufreq/Kconfig"
 612
 613 config SH_CPU_FREQ
 614         tristate "SuperH CPU Frequency driver"
 615         depends on CPU_FREQ
 616         select CPU_FREQ_TABLE
 617         help
 618           This adds the cpufreq driver for SuperH. Any CPU that supports
 619           clock rate rounding through the clock framework can use this
 620           driver. While it will make the kernel slightly larger, this is
 621           harmless for CPUs that don't support rate rounding. The driver
 622           will also generate a notice in the boot log before disabling
 623           itself if the CPU in question is not capable of rate rounding.
 624
 625           For details, take a look at <file:Documentation/cpu-freq>.
 626
 627           If unsure, say N.
 628
 629 endmenu
 630
 631 source "arch/sh/drivers/Kconfig"
 632
 633 endmenu
 634
 635 menu "Kernel features"
 636
 637 source kernel/Kconfig.hz
 638
 639 config KEXEC
 640         bool "kexec system call (EXPERIMENTAL)"
 641         depends on SUPERH32 && EXPERIMENTAL && MMU
 642         help
 643           kexec is a system call that implements the ability to shutdown your
 644           current kernel, and to start another kernel.  It is like a reboot
 645           but it is independent of the system firmware.  And like a reboot
 646           you can start any kernel with it, not just Linux.
 647
 648           The name comes from the similarity to the exec system call.
 649
 650           It is an ongoing process to be certain the hardware in a machine
 651           is properly shutdown, so do not be surprised if this code does not
 652           initially work for you.  It may help to enable device hotplugging
 653           support.  As of this writing the exact hardware interface is
 654           strongly in flux, so no good recommendation can be made.
 655
 656 config CRASH_DUMP
 657         bool "kernel crash dumps (EXPERIMENTAL)"
 658         depends on SUPERH32 && EXPERIMENTAL && BROKEN_ON_SMP
 659         help
 660           Generate crash dump after being started by kexec.
 661           This should be normally only set in special crash dump kernels
 662           which are loaded in the main kernel with kexec-tools into
 663           a specially reserved region and then later executed after
 664           a crash by kdump/kexec. The crash dump kernel must be compiled
 665           to a memory address not used by the main kernel using
 666           PHYSICAL_START.
 667
 668           For more details see Documentation/kdump/kdump.txt
 669
 670 config KEXEC_JUMP
 671         bool "kexec jump (EXPERIMENTAL)"
 672         depends on SUPERH32 && KEXEC && HIBERNATION && EXPERIMENTAL
 673         help
 674           Jump between original kernel and kexeced kernel and invoke
 675           code via KEXEC
 676
 677 config PHYSICAL_START
 678         hex "Physical address where the kernel is loaded" if (EXPERT || CRASH_DUMP)
 679         default MEMORY_START
 680         ---help---
 681           This gives the physical address where the kernel is loaded
 682           and is ordinarily the same as MEMORY_START.
 683
 684           Different values are primarily used in the case of kexec on panic
 685           where the fail safe kernel needs to run at a different address
 686           than the panic-ed kernel.
 687
 688 config SECCOMP
 689         bool "Enable seccomp to safely compute untrusted bytecode"
 690         depends on PROC_FS
 691         help
 692           This kernel feature is useful for number crunching applications
 693           that may need to compute untrusted bytecode during their
 694           execution. By using pipes or other transports made available to
 695           the process as file descriptors supporting the read/write
 696           syscalls, it's possible to isolate those applications in
 697           their own address space using seccomp. Once seccomp is
 698           enabled via prctl, it cannot be disabled and the task is only
 699           allowed to execute a few safe syscalls defined by each seccomp
 700           mode.
 701
 702           If unsure, say N.
 703
 704 config CC_STACKPROTECTOR
 705         bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
 706         depends on SUPERH32 && EXPERIMENTAL
 707         help
 708           This option turns on the -fstack-protector GCC feature. This
 709           feature puts, at the beginning of functions, a canary value on
 710           the stack just before the return address, and validates
 711           the value just before actually returning.  Stack based buffer
 712           overflows (that need to overwrite this return address) now also
 713           overwrite the canary, which gets detected and the attack is then
 714           neutralized via a kernel panic.
 715
 716           This feature requires gcc version 4.2 or above.
 717
 718 config SMP
 719         bool "Symmetric multi-processing support"
 720         depends on SYS_SUPPORTS_SMP
 721         select USE_GENERIC_SMP_HELPERS
 722         ---help---
 723           This enables support for systems with more than one CPU. If you have
 724           a system with only one CPU, like most personal computers, say N. If
 725           you have a system with more than one CPU, say Y.
 726
 727           If you say N here, the kernel will run on single and multiprocessor
 728           machines, but will use only one CPU of a multiprocessor machine. If
 729           you say Y here, the kernel will run on many, but not all,
 730           singleprocessor machines. On a singleprocessor machine, the kernel
 731           will run faster if you say N here.
 732
 733           People using multiprocessor machines who say Y here should also say
 734           Y to "Enhanced Real Time Clock Support", below.
 735
 736           See also <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO
 737           available at <http://www.tldp.org/docs.html#howto>.
 738
 739           If you don't know what to do here, say N.
 740
 741 config NR_CPUS
 742         int "Maximum number of CPUs (2-32)"
 743         range 2 32
 744         depends on SMP
 745         default "4" if CPU_SUBTYPE_SHX3
 746         default "2"
 747         help
 748           This allows you to specify the maximum number of CPUs which this
 749           kernel will support.  The maximum supported value is 32 and the
 750           minimum value which makes sense is 2.
 751
 752           This is purely to save memory - each supported CPU adds
 753           approximately eight kilobytes to the kernel image.
 754
 755 config HOTPLUG_CPU
 756         bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
 757         depends on SMP && HOTPLUG && EXPERIMENTAL
 758         help
 759           Say Y here to experiment with turning CPUs off and on.  CPUs
 760           can be controlled through /sys/devices/system/cpu.
 761
 762 source "kernel/Kconfig.preempt"
 763
 764 config GUSA
 765         def_bool y
 766         depends on !SMP && SUPERH32
 767         help
 768           This enables support for gUSA (general UserSpace Atomicity).
 769           This is the default implementation for both UP and non-ll/sc
 770           CPUs, and is used by the libc, amongst others.
 771
 772           For additional information, design information can be found
 773           in <http://lc.linux.or.jp/lc2002/papers/niibe0919p.pdf>.
 774
 775           This should only be disabled for special cases where alternate
 776           atomicity implementations exist.
 777
 778 config GUSA_RB
 779         bool "Implement atomic operations by roll-back (gRB) (EXPERIMENTAL)"
 780         depends on GUSA && CPU_SH3 || (CPU_SH4 && !CPU_SH4A)
 781         help
 782           Enabling this option will allow the kernel to implement some
 783           atomic operations using a software implementation of load-locked/
 784           store-conditional (LLSC). On machines which do not have hardware
 785           LLSC, this should be more efficient than the other alternative of
 786           disabling interrupts around the atomic sequence.
 787
 788 config HW_PERF_EVENTS
 789         bool "Enable hardware performance counter support for perf events"
 790         depends on PERF_EVENTS && CPU_HAS_PMU
 791         default y
 792         help
 793           Enable hardware performance counter support for perf events. If
 794           disabled, perf events will use software events only.
 795
 796 source "drivers/sh/Kconfig"
 797
 798 endmenu
 799
 800 menu "Boot options"
 801
 802 config ZERO_PAGE_OFFSET
 803         hex
 804         default "0x00010000" if PAGE_SIZE_64KB || SH_RTS7751R2D || \
 805                                 SH_7751_SOLUTION_ENGINE
 806         default "0x00004000" if PAGE_SIZE_16KB || SH_SH03
 807         default "0x00002000" if PAGE_SIZE_8KB
 808         default "0x00001000"
 809         help
 810           This sets the default offset of zero page.
 811
 812 config BOOT_LINK_OFFSET
 813         hex
 814         default "0x00210000" if SH_SHMIN
 815         default "0x00400000" if SH_CAYMAN
 816         default "0x00810000" if SH_7780_SOLUTION_ENGINE
 817         default "0x009e0000" if SH_TITAN
 818         default "0x01800000" if SH_SDK7780
 819         default "0x02000000" if SH_EDOSK7760
 820         default "0x00800000"
 821         help
 822           This option allows you to set the link address offset of the zImage.
 823           This can be useful if you are on a board which has a small amount of
 824           memory.
 825
 826 config ENTRY_OFFSET
 827         hex
 828         default "0x00001000" if PAGE_SIZE_4KB
 829         default "0x00002000" if PAGE_SIZE_8KB
 830         default "0x00004000" if PAGE_SIZE_16KB
 831         default "0x00010000" if PAGE_SIZE_64KB
 832         default "0x00000000"
 833
 834 config ROMIMAGE_MMCIF
 835         bool "Include MMCIF loader in romImage (EXPERIMENTAL)"
 836         depends on CPU_SUBTYPE_SH7724 && EXPERIMENTAL
 837         help
 838           Say Y here to include experimental MMCIF loading code in
 839           romImage. With this enabled it is possible to write the romImage
 840           kernel image to an MMC card and boot the kernel straight from
 841           the reset vector. At reset the processor Mask ROM will load the
 842           first part of the romImage which in turn loads the rest the kernel
 843           image to RAM using the MMCIF hardware block.
 844
 845 choice
 846         prompt "Kernel command line"
 847         optional
 848         default CMDLINE_OVERWRITE
 849         help
 850           Setting this option allows the kernel command line arguments
 851           to be set.
 852
 853 config CMDLINE_OVERWRITE
 854         bool "Overwrite bootloader kernel arguments"
 855         help
 856           Given string will overwrite any arguments passed in by
 857           a bootloader.
 858
 859 config CMDLINE_EXTEND
 860         bool "Extend bootloader kernel arguments"
 861         help
 862           Given string will be concatenated with arguments passed in
 863           by a bootloader.
 864
 865 endchoice
 866
 867 config CMDLINE
 868         string "Kernel command line arguments string"
 869         depends on CMDLINE_OVERWRITE || CMDLINE_EXTEND
 870         default "console=ttySC1,115200"
 871
 872 endmenu
 873
 874 menu "Bus options"
 875
 876 config SUPERHYWAY
 877         tristate "SuperHyway Bus support"
 878         depends on CPU_SUBTYPE_SH4_202
 879
 880 config MAPLE
 881         bool "Maple Bus support"
 882         depends on SH_DREAMCAST
 883         help
 884          The Maple Bus is SEGA's serial communication bus for peripherals
 885          on the Dreamcast. Without this bus support you won't be able to
 886          get your Dreamcast keyboard etc to work, so most users
 887          probably want to say 'Y' here, unless you are only using the
 888          Dreamcast with a serial line terminal or a remote network
 889          connection.
 890
 891 config PCI
 892         bool "PCI support"
 893         depends on SYS_SUPPORTS_PCI
 894         select PCI_DOMAINS
 895         select GENERIC_PCI_IOMAP
 896         select NO_GENERIC_PCI_IOPORT_MAP
 897         help
 898           Find out whether you have a PCI motherboard. PCI is the name of a
 899           bus system, i.e. the way the CPU talks to the other stuff inside
 900           your box. If you have PCI, say Y, otherwise N.
 901
 902 config PCI_DOMAINS
 903         bool
 904
 905 source "drivers/pci/pcie/Kconfig"
 906
 907 source "drivers/pci/Kconfig"
 908
 909 source "drivers/pcmcia/Kconfig"
 910
 911 source "drivers/pci/hotplug/Kconfig"
 912
 913 endmenu
 914
 915 menu "Executable file formats"
 916
 917 source "fs/Kconfig.binfmt"
 918
 919 endmenu
 920
 921 menu "Power management options (EXPERIMENTAL)"
 922 depends on EXPERIMENTAL
 923
 924 source "kernel/power/Kconfig"
 925
 926 source "drivers/cpuidle/Kconfig"
 927
 928 endmenu
 929
 930 source "net/Kconfig"
 931
 932 source "drivers/Kconfig"
 933
 934 source "fs/Kconfig"
 935
 936 source "arch/sh/Kconfig.debug"
 937
 938 source "security/Kconfig"
 939
 940 source "crypto/Kconfig"
 941
 942 source "lib/Kconfig"