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 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 HAVE_GENERIC_HARDIRQS
  31         select MAY_HAVE_SPARSE_IRQ
  32         select IRQ_FORCED_THREADING
  33         select RTC_LIB
  34         select GENERIC_ATOMIC64
  35         select GENERIC_IRQ_SHOW
  36         select GENERIC_SMP_IDLE_THREAD
  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         help
  44           The SuperH is a RISC processor targeted for use in embedded systems
  45           and consumer electronics; it was also used in the Sega Dreamcast
  46           gaming console.  The SuperH port has a home page at
  47           <http://www.linux-sh.org/>.
  48
  49 config SUPERH32
  50         def_bool ARCH = "sh"
  51         select HAVE_KPROBES
  52         select HAVE_KRETPROBES
  53         select HAVE_IOREMAP_PROT if MMU && !X2TLB
  54         select HAVE_FUNCTION_TRACER
  55         select HAVE_FTRACE_MCOUNT_RECORD
  56         select HAVE_DYNAMIC_FTRACE
  57         select HAVE_FUNCTION_TRACE_MCOUNT_TEST
  58         select HAVE_FTRACE_NMI_ENTER if DYNAMIC_FTRACE
  59         select ARCH_WANT_IPC_PARSE_VERSION
  60         select HAVE_FUNCTION_GRAPH_TRACER
  61         select HAVE_ARCH_KGDB
  62         select HAVE_HW_BREAKPOINT
  63         select HAVE_MIXED_BREAKPOINTS_REGS
  64         select PERF_EVENTS
  65         select ARCH_HIBERNATION_POSSIBLE if MMU
  66         select SPARSE_IRQ
  67
  68 config SUPERH64
  69         def_bool ARCH = "sh64"
  70         select KALLSYMS
  71
  72 config ARCH_DEFCONFIG
  73         string
  74         default "arch/sh/configs/shx3_defconfig" if SUPERH32
  75         default "arch/sh/configs/cayman_defconfig" if SUPERH64
  76
  77 config RWSEM_GENERIC_SPINLOCK
  78         def_bool y
  79
  80 config RWSEM_XCHGADD_ALGORITHM
  81         bool
  82
  83 config GENERIC_BUG
  84         def_bool y
  85         depends on BUG && SUPERH32
  86
  87 config GENERIC_CSUM
  88         def_bool y
  89         depends on SUPERH64
  90
  91 config GENERIC_HWEIGHT
  92         def_bool y
  93
  94 config IRQ_PER_CPU
  95         def_bool y
  96
  97 config GENERIC_GPIO
  98         def_bool n
  99
 100 config GENERIC_CALIBRATE_DELAY
 101         bool
 102
 103 config GENERIC_LOCKBREAK
 104         def_bool y
 105         depends on SMP && PREEMPT
 106
 107 config ARCH_SUSPEND_POSSIBLE
 108         def_bool n
 109
 110 config ARCH_HIBERNATION_POSSIBLE
 111         def_bool n
 112
 113 config SYS_SUPPORTS_APM_EMULATION
 114         bool
 115         select ARCH_SUSPEND_POSSIBLE
 116
 117 config SYS_SUPPORTS_HUGETLBFS
 118         bool
 119
 120 config SYS_SUPPORTS_SMP
 121         bool
 122
 123 config SYS_SUPPORTS_NUMA
 124         bool
 125
 126 config SYS_SUPPORTS_PCI
 127         bool
 128
 129 config SYS_SUPPORTS_CMT
 130         bool
 131
 132 config SYS_SUPPORTS_MTU2
 133         bool
 134
 135 config SYS_SUPPORTS_TMU
 136         bool
 137
 138 config STACKTRACE_SUPPORT
 139         def_bool y
 140
 141 config LOCKDEP_SUPPORT
 142         def_bool y
 143
 144 config HAVE_LATENCYTOP_SUPPORT
 145         def_bool y
 146
 147 config ARCH_HAS_ILOG2_U32
 148         def_bool n
 149
 150 config ARCH_HAS_ILOG2_U64
 151         def_bool n
 152
 153 config ARCH_NO_VIRT_TO_BUS
 154         def_bool y
 155
 156 config ARCH_HAS_DEFAULT_IDLE
 157         def_bool y
 158
 159 config NO_IOPORT
 160         def_bool !PCI
 161         depends on !SH_CAYMAN && !SH_SH4202_MICRODEV && !SH_SHMIN && \
 162                    !SH_HP6XX && !SH_SOLUTION_ENGINE
 163
 164 config IO_TRAPPED
 165         bool
 166
 167 config SWAP_IO_SPACE
 168         bool
 169
 170 config DMA_COHERENT
 171         bool
 172
 173 config DMA_NONCOHERENT
 174         def_bool !DMA_COHERENT
 175
 176 config NEED_DMA_MAP_STATE
 177         def_bool DMA_NONCOHERENT
 178
 179 config NEED_SG_DMA_LENGTH
 180         def_bool y
 181
 182 source "init/Kconfig"
 183
 184 source "kernel/Kconfig.freezer"
 185
 186 menu "System type"
 187
 188 #
 189 # Processor families
 190 #
 191 config CPU_SH2
 192         bool
 193
 194 config CPU_SH2A
 195         bool
 196         select CPU_SH2
 197         select UNCACHED_MAPPING
 198
 199 config CPU_SH3
 200         bool
 201         select CPU_HAS_INTEVT
 202         select CPU_HAS_SR_RB
 203         select SYS_SUPPORTS_TMU
 204
 205 config CPU_SH4
 206         bool
 207         select CPU_HAS_INTEVT
 208         select CPU_HAS_SR_RB
 209         select CPU_HAS_FPU if !CPU_SH4AL_DSP
 210         select SYS_SUPPORTS_TMU
 211         select SYS_SUPPORTS_HUGETLBFS if MMU
 212
 213 config CPU_SH4A
 214         bool
 215         select CPU_SH4
 216
 217 config CPU_SH4AL_DSP
 218         bool
 219         select CPU_SH4A
 220         select CPU_HAS_DSP
 221
 222 config CPU_SH5
 223         bool
 224         select CPU_HAS_FPU
 225         select SYS_SUPPORTS_TMU
 226         select SYS_SUPPORTS_HUGETLBFS if MMU
 227
 228 config CPU_SHX2
 229         bool
 230
 231 config CPU_SHX3
 232         bool
 233         select DMA_COHERENT
 234         select SYS_SUPPORTS_SMP
 235         select SYS_SUPPORTS_NUMA
 236
 237 config ARCH_SHMOBILE
 238         bool
 239         select ARCH_SUSPEND_POSSIBLE
 240         select PM
 241         select PM_RUNTIME
 242
 243 config CPU_HAS_PMU
 244        depends on CPU_SH4 || CPU_SH4A
 245        default y
 246        bool
 247
 248 if SUPERH32
 249
 250 choice
 251         prompt "Processor sub-type selection"
 252
 253 #
 254 # Processor subtypes
 255 #
 256
 257 # SH-2 Processor Support
 258
 259 config CPU_SUBTYPE_SH7619
 260         bool "Support SH7619 processor"
 261         select CPU_SH2
 262         select SYS_SUPPORTS_CMT
 263
 264 # SH-2A Processor Support
 265
 266 config CPU_SUBTYPE_SH7201
 267         bool "Support SH7201 processor"
 268         select CPU_SH2A
 269         select CPU_HAS_FPU
 270         select SYS_SUPPORTS_MTU2
 271
 272 config CPU_SUBTYPE_SH7203
 273         bool "Support SH7203 processor"
 274         select CPU_SH2A
 275         select CPU_HAS_FPU
 276         select SYS_SUPPORTS_CMT
 277         select SYS_SUPPORTS_MTU2
 278         select ARCH_WANT_OPTIONAL_GPIOLIB
 279         select PINCTRL
 280
 281 config CPU_SUBTYPE_SH7206
 282         bool "Support SH7206 processor"
 283         select CPU_SH2A
 284         select SYS_SUPPORTS_CMT
 285         select SYS_SUPPORTS_MTU2
 286
 287 config CPU_SUBTYPE_SH7263
 288         bool "Support SH7263 processor"
 289         select CPU_SH2A
 290         select CPU_HAS_FPU
 291         select SYS_SUPPORTS_CMT
 292         select SYS_SUPPORTS_MTU2
 293
 294 config CPU_SUBTYPE_SH7264
 295         bool "Support SH7264 processor"
 296         select CPU_SH2A
 297         select CPU_HAS_FPU
 298         select SYS_SUPPORTS_CMT
 299         select SYS_SUPPORTS_MTU2
 300         select PINCTRL
 301
 302 config CPU_SUBTYPE_SH7269
 303         bool "Support SH7269 processor"
 304         select CPU_SH2A
 305         select CPU_HAS_FPU
 306         select SYS_SUPPORTS_CMT
 307         select SYS_SUPPORTS_MTU2
 308
 309 config CPU_SUBTYPE_MXG
 310         bool "Support MX-G processor"
 311         select CPU_SH2A
 312         select SYS_SUPPORTS_MTU2
 313         help
 314           Select MX-G if running on an R8A03022BG part.
 315
 316 # SH-3 Processor Support
 317
 318 config CPU_SUBTYPE_SH7705
 319         bool "Support SH7705 processor"
 320         select CPU_SH3
 321
 322 config CPU_SUBTYPE_SH7706
 323         bool "Support SH7706 processor"
 324         select CPU_SH3
 325         help
 326           Select SH7706 if you have a 133 Mhz SH-3 HD6417706 CPU.
 327
 328 config CPU_SUBTYPE_SH7707
 329         bool "Support SH7707 processor"
 330         select CPU_SH3
 331         help
 332           Select SH7707 if you have a  60 Mhz SH-3 HD6417707 CPU.
 333
 334 config CPU_SUBTYPE_SH7708
 335         bool "Support SH7708 processor"
 336         select CPU_SH3
 337         help
 338           Select SH7708 if you have a  60 Mhz SH-3 HD6417708S or
 339           if you have a 100 Mhz SH-3 HD6417708R CPU.
 340
 341 config CPU_SUBTYPE_SH7709
 342         bool "Support SH7709 processor"
 343         select CPU_SH3
 344         help
 345           Select SH7709 if you have a  80 Mhz SH-3 HD6417709 CPU.
 346
 347 config CPU_SUBTYPE_SH7710
 348         bool "Support SH7710 processor"
 349         select CPU_SH3
 350         select CPU_HAS_DSP
 351         help
 352           Select SH7710 if you have a SH3-DSP SH7710 CPU.
 353
 354 config CPU_SUBTYPE_SH7712
 355         bool "Support SH7712 processor"
 356         select CPU_SH3
 357         select CPU_HAS_DSP
 358         help
 359           Select SH7712 if you have a SH3-DSP SH7712 CPU.
 360
 361 config CPU_SUBTYPE_SH7720
 362         bool "Support SH7720 processor"
 363         select CPU_SH3
 364         select CPU_HAS_DSP
 365         select SYS_SUPPORTS_CMT
 366         select ARCH_WANT_OPTIONAL_GPIOLIB
 367         select USB_ARCH_HAS_OHCI
 368         select USB_OHCI_SH if USB_OHCI_HCD
 369         help
 370           Select SH7720 if you have a SH3-DSP SH7720 CPU.
 371
 372 config CPU_SUBTYPE_SH7721
 373         bool "Support SH7721 processor"
 374         select CPU_SH3
 375         select CPU_HAS_DSP
 376         select SYS_SUPPORTS_CMT
 377         select USB_ARCH_HAS_OHCI
 378         select USB_OHCI_SH if USB_OHCI_HCD
 379         help
 380           Select SH7721 if you have a SH3-DSP SH7721 CPU.
 381
 382 # SH-4 Processor Support
 383
 384 config CPU_SUBTYPE_SH7750
 385         bool "Support SH7750 processor"
 386         select CPU_SH4
 387         help
 388           Select SH7750 if you have a 200 Mhz SH-4 HD6417750 CPU.
 389
 390 config CPU_SUBTYPE_SH7091
 391         bool "Support SH7091 processor"
 392         select CPU_SH4
 393         help
 394           Select SH7091 if you have an SH-4 based Sega device (such as
 395           the Dreamcast, Naomi, and Naomi 2).
 396
 397 config CPU_SUBTYPE_SH7750R
 398         bool "Support SH7750R processor"
 399         select CPU_SH4
 400
 401 config CPU_SUBTYPE_SH7750S
 402         bool "Support SH7750S processor"
 403         select CPU_SH4
 404
 405 config CPU_SUBTYPE_SH7751
 406         bool "Support SH7751 processor"
 407         select CPU_SH4
 408         help
 409           Select SH7751 if you have a 166 Mhz SH-4 HD6417751 CPU,
 410           or if you have a HD6417751R CPU.
 411
 412 config CPU_SUBTYPE_SH7751R
 413         bool "Support SH7751R processor"
 414         select CPU_SH4
 415
 416 config CPU_SUBTYPE_SH7760
 417         bool "Support SH7760 processor"
 418         select CPU_SH4
 419
 420 config CPU_SUBTYPE_SH4_202
 421         bool "Support SH4-202 processor"
 422         select CPU_SH4
 423
 424 # SH-4A Processor Support
 425
 426 config CPU_SUBTYPE_SH7723
 427         bool "Support SH7723 processor"
 428         select CPU_SH4A
 429         select CPU_SHX2
 430         select ARCH_SHMOBILE
 431         select ARCH_SPARSEMEM_ENABLE
 432         select SYS_SUPPORTS_CMT
 433         select ARCH_WANT_OPTIONAL_GPIOLIB
 434         help
 435           Select SH7723 if you have an SH-MobileR2 CPU.
 436
 437 config CPU_SUBTYPE_SH7724
 438         bool "Support SH7724 processor"
 439         select CPU_SH4A
 440         select CPU_SHX2
 441         select ARCH_SHMOBILE
 442         select ARCH_SPARSEMEM_ENABLE
 443         select SYS_SUPPORTS_CMT
 444         select ARCH_WANT_OPTIONAL_GPIOLIB
 445         help
 446           Select SH7724 if you have an SH-MobileR2R CPU.
 447
 448 config CPU_SUBTYPE_SH7734
 449         bool "Support SH7734 processor"
 450         select CPU_SH4A
 451         select CPU_SHX2
 452         select ARCH_WANT_OPTIONAL_GPIOLIB
 453         select USB_ARCH_HAS_OHCI
 454         select USB_ARCH_HAS_EHCI
 455         help
 456           Select SH7734 if you have a SH4A SH7734 CPU.
 457
 458 config CPU_SUBTYPE_SH7757
 459         bool "Support SH7757 processor"
 460         select CPU_SH4A
 461         select CPU_SHX2
 462         select ARCH_WANT_OPTIONAL_GPIOLIB
 463         select USB_ARCH_HAS_OHCI
 464         select USB_ARCH_HAS_EHCI
 465         help
 466           Select SH7757 if you have a SH4A SH7757 CPU.
 467
 468 config CPU_SUBTYPE_SH7763
 469         bool "Support SH7763 processor"
 470         select CPU_SH4A
 471         select USB_ARCH_HAS_OHCI
 472         select USB_OHCI_SH if USB_OHCI_HCD
 473         help
 474           Select SH7763 if you have a SH4A SH7763(R5S77631) CPU.
 475
 476 config CPU_SUBTYPE_SH7770
 477         bool "Support SH7770 processor"
 478         select CPU_SH4A
 479
 480 config CPU_SUBTYPE_SH7780
 481         bool "Support SH7780 processor"
 482         select CPU_SH4A
 483
 484 config CPU_SUBTYPE_SH7785
 485         bool "Support SH7785 processor"
 486         select CPU_SH4A
 487         select CPU_SHX2
 488         select ARCH_SPARSEMEM_ENABLE
 489         select SYS_SUPPORTS_NUMA
 490         select ARCH_WANT_OPTIONAL_GPIOLIB
 491
 492 config CPU_SUBTYPE_SH7786
 493         bool "Support SH7786 processor"
 494         select CPU_SH4A
 495         select CPU_SHX3
 496         select CPU_HAS_PTEAEX
 497         select GENERIC_CLOCKEVENTS_BROADCAST if SMP
 498         select ARCH_WANT_OPTIONAL_GPIOLIB
 499         select USB_ARCH_HAS_OHCI
 500         select USB_OHCI_SH if USB_OHCI_HCD
 501         select USB_ARCH_HAS_EHCI
 502         select USB_EHCI_SH if USB_EHCI_HCD
 503
 504 config CPU_SUBTYPE_SHX3
 505         bool "Support SH-X3 processor"
 506         select CPU_SH4A
 507         select CPU_SHX3
 508         select GENERIC_CLOCKEVENTS_BROADCAST if SMP
 509         select ARCH_REQUIRE_GPIOLIB
 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
 529 config CPU_SUBTYPE_SH7366
 530         bool "Support SH7366 processor"
 531         select CPU_SH4AL_DSP
 532         select CPU_SHX2
 533         select ARCH_SHMOBILE
 534         select ARCH_SPARSEMEM_ENABLE
 535         select SYS_SUPPORTS_NUMA
 536         select SYS_SUPPORTS_CMT
 537
 538 endchoice
 539
 540 endif
 541
 542 if SUPERH64
 543
 544 choice
 545         prompt "Processor sub-type selection"
 546
 547 # SH-5 Processor Support
 548
 549 config CPU_SUBTYPE_SH5_101
 550         bool "Support SH5-101 processor"
 551         select CPU_SH5
 552
 553 config CPU_SUBTYPE_SH5_103
 554         bool "Support SH5-103 processor"
 555         select CPU_SH5
 556
 557 endchoice
 558
 559 endif
 560
 561 source "arch/sh/mm/Kconfig"
 562
 563 source "arch/sh/Kconfig.cpu"
 564
 565 source "arch/sh/boards/Kconfig"
 566
 567 menu "Timer and clock configuration"
 568
 569 config SH_TIMER_TMU
 570         bool "TMU timer driver"
 571         depends on SYS_SUPPORTS_TMU
 572         default y
 573         help
 574           This enables the build of the TMU timer driver.
 575
 576 config SH_TIMER_CMT
 577         bool "CMT timer driver"
 578         depends on SYS_SUPPORTS_CMT
 579         default y
 580         help
 581           This enables build of the CMT timer driver.
 582
 583 config SH_TIMER_MTU2
 584         bool "MTU2 timer driver"
 585         depends on SYS_SUPPORTS_MTU2
 586         default y
 587         help
 588           This enables build of the MTU2 timer driver.
 589
 590 config SH_PCLK_FREQ
 591         int "Peripheral clock frequency (in Hz)"
 592         depends on SH_CLK_CPG_LEGACY
 593         default "31250000" if CPU_SUBTYPE_SH7619
 594         default "33333333" if CPU_SUBTYPE_SH7770 || \
 595                               CPU_SUBTYPE_SH7760 || \
 596                               CPU_SUBTYPE_SH7705 || \
 597                               CPU_SUBTYPE_SH7203 || \
 598                               CPU_SUBTYPE_SH7206 || \
 599                               CPU_SUBTYPE_SH7263 || \
 600                               CPU_SUBTYPE_MXG
 601         default "60000000" if CPU_SUBTYPE_SH7751 || CPU_SUBTYPE_SH7751R
 602         default "66000000" if CPU_SUBTYPE_SH4_202
 603         default "50000000"
 604         help
 605           This option is used to specify the peripheral clock frequency.
 606           This is necessary for determining the reference clock value on
 607           platforms lacking an RTC.
 608
 609 config SH_CLK_CPG
 610         def_bool y
 611
 612 config SH_CLK_CPG_LEGACY
 613         depends on SH_CLK_CPG
 614         def_bool y if !CPU_SUBTYPE_SH7785 && !ARCH_SHMOBILE && \
 615                       !CPU_SHX3 && !CPU_SUBTYPE_SH7757 && \
 616                       !CPU_SUBTYPE_SH7734 && !CPU_SUBTYPE_SH7264 && \
 617                       !CPU_SUBTYPE_SH7269
 618
 619 endmenu
 620
 621 menu "CPU Frequency scaling"
 622
 623 source "drivers/cpufreq/Kconfig"
 624
 625 config SH_CPU_FREQ
 626         tristate "SuperH CPU Frequency driver"
 627         depends on CPU_FREQ
 628         select CPU_FREQ_TABLE
 629         help
 630           This adds the cpufreq driver for SuperH. Any CPU that supports
 631           clock rate rounding through the clock framework can use this
 632           driver. While it will make the kernel slightly larger, this is
 633           harmless for CPUs that don't support rate rounding. The driver
 634           will also generate a notice in the boot log before disabling
 635           itself if the CPU in question is not capable of rate rounding.
 636
 637           For details, take a look at <file:Documentation/cpu-freq>.
 638
 639           If unsure, say N.
 640
 641 endmenu
 642
 643 source "arch/sh/drivers/Kconfig"
 644
 645 endmenu
 646
 647 menu "Kernel features"
 648
 649 source kernel/Kconfig.hz
 650
 651 config KEXEC
 652         bool "kexec system call (EXPERIMENTAL)"
 653         depends on SUPERH32 && EXPERIMENTAL && MMU
 654         help
 655           kexec is a system call that implements the ability to shutdown your
 656           current kernel, and to start another kernel.  It is like a reboot
 657           but it is independent of the system firmware.  And like a reboot
 658           you can start any kernel with it, not just Linux.
 659
 660           The name comes from the similarity to the exec system call.
 661
 662           It is an ongoing process to be certain the hardware in a machine
 663           is properly shutdown, so do not be surprised if this code does not
 664           initially work for you.  It may help to enable device hotplugging
 665           support.  As of this writing the exact hardware interface is
 666           strongly in flux, so no good recommendation can be made.
 667
 668 config CRASH_DUMP
 669         bool "kernel crash dumps (EXPERIMENTAL)"
 670         depends on SUPERH32 && EXPERIMENTAL && BROKEN_ON_SMP
 671         help
 672           Generate crash dump after being started by kexec.
 673           This should be normally only set in special crash dump kernels
 674           which are loaded in the main kernel with kexec-tools into
 675           a specially reserved region and then later executed after
 676           a crash by kdump/kexec. The crash dump kernel must be compiled
 677           to a memory address not used by the main kernel using
 678           PHYSICAL_START.
 679
 680           For more details see Documentation/kdump/kdump.txt
 681
 682 config KEXEC_JUMP
 683         bool "kexec jump (EXPERIMENTAL)"
 684         depends on SUPERH32 && KEXEC && HIBERNATION && EXPERIMENTAL
 685         help
 686           Jump between original kernel and kexeced kernel and invoke
 687           code via KEXEC
 688
 689 config PHYSICAL_START
 690         hex "Physical address where the kernel is loaded" if (EXPERT || CRASH_DUMP)
 691         default MEMORY_START
 692         ---help---
 693           This gives the physical address where the kernel is loaded
 694           and is ordinarily the same as MEMORY_START.
 695
 696           Different values are primarily used in the case of kexec on panic
 697           where the fail safe kernel needs to run at a different address
 698           than the panic-ed kernel.
 699
 700 config SECCOMP
 701         bool "Enable seccomp to safely compute untrusted bytecode"
 702         depends on PROC_FS
 703         help
 704           This kernel feature is useful for number crunching applications
 705           that may need to compute untrusted bytecode during their
 706           execution. By using pipes or other transports made available to
 707           the process as file descriptors supporting the read/write
 708           syscalls, it's possible to isolate those applications in
 709           their own address space using seccomp. Once seccomp is
 710           enabled via prctl, it cannot be disabled and the task is only
 711           allowed to execute a few safe syscalls defined by each seccomp
 712           mode.
 713
 714           If unsure, say N.
 715
 716 config CC_STACKPROTECTOR
 717         bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
 718         depends on SUPERH32 && EXPERIMENTAL
 719         help
 720           This option turns on the -fstack-protector GCC feature. This
 721           feature puts, at the beginning of functions, a canary value on
 722           the stack just before the return address, and validates
 723           the value just before actually returning.  Stack based buffer
 724           overflows (that need to overwrite this return address) now also
 725           overwrite the canary, which gets detected and the attack is then
 726           neutralized via a kernel panic.
 727
 728           This feature requires gcc version 4.2 or above.
 729
 730 config SMP
 731         bool "Symmetric multi-processing support"
 732         depends on SYS_SUPPORTS_SMP
 733         select USE_GENERIC_SMP_HELPERS
 734         ---help---
 735           This enables support for systems with more than one CPU. If you have
 736           a system with only one CPU, like most personal computers, say N. If
 737           you have a system with more than one CPU, say Y.
 738
 739           If you say N here, the kernel will run on single and multiprocessor
 740           machines, but will use only one CPU of a multiprocessor machine. If
 741           you say Y here, the kernel will run on many, but not all,
 742           singleprocessor machines. On a singleprocessor machine, the kernel
 743           will run faster if you say N here.
 744
 745           People using multiprocessor machines who say Y here should also say
 746           Y to "Enhanced Real Time Clock Support", below.
 747
 748           See also <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO
 749           available at <http://www.tldp.org/docs.html#howto>.
 750
 751           If you don't know what to do here, say N.
 752
 753 config NR_CPUS
 754         int "Maximum number of CPUs (2-32)"
 755         range 2 32
 756         depends on SMP
 757         default "4" if CPU_SUBTYPE_SHX3
 758         default "2"
 759         help
 760           This allows you to specify the maximum number of CPUs which this
 761           kernel will support.  The maximum supported value is 32 and the
 762           minimum value which makes sense is 2.
 763
 764           This is purely to save memory - each supported CPU adds
 765           approximately eight kilobytes to the kernel image.
 766
 767 config HOTPLUG_CPU
 768         bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
 769         depends on SMP && HOTPLUG && EXPERIMENTAL
 770         help
 771           Say Y here to experiment with turning CPUs off and on.  CPUs
 772           can be controlled through /sys/devices/system/cpu.
 773
 774 source "kernel/Kconfig.preempt"
 775
 776 config GUSA
 777         def_bool y
 778         depends on !SMP && SUPERH32
 779         help
 780           This enables support for gUSA (general UserSpace Atomicity).
 781           This is the default implementation for both UP and non-ll/sc
 782           CPUs, and is used by the libc, amongst others.
 783
 784           For additional information, design information can be found
 785           in <http://lc.linux.or.jp/lc2002/papers/niibe0919p.pdf>.
 786
 787           This should only be disabled for special cases where alternate
 788           atomicity implementations exist.
 789
 790 config GUSA_RB
 791         bool "Implement atomic operations by roll-back (gRB) (EXPERIMENTAL)"
 792         depends on GUSA && CPU_SH3 || (CPU_SH4 && !CPU_SH4A)
 793         help
 794           Enabling this option will allow the kernel to implement some
 795           atomic operations using a software implementation of load-locked/
 796           store-conditional (LLSC). On machines which do not have hardware
 797           LLSC, this should be more efficient than the other alternative of
 798           disabling interrupts around the atomic sequence.
 799
 800 config HW_PERF_EVENTS
 801         bool "Enable hardware performance counter support for perf events"
 802         depends on PERF_EVENTS && CPU_HAS_PMU
 803         default y
 804         help
 805           Enable hardware performance counter support for perf events. If
 806           disabled, perf events will use software events only.
 807
 808 source "drivers/sh/Kconfig"
 809
 810 endmenu
 811
 812 menu "Boot options"
 813
 814 config ZERO_PAGE_OFFSET
 815         hex
 816         default "0x00010000" if PAGE_SIZE_64KB || SH_RTS7751R2D || \
 817                                 SH_7751_SOLUTION_ENGINE
 818         default "0x00004000" if PAGE_SIZE_16KB || SH_SH03
 819         default "0x00002000" if PAGE_SIZE_8KB
 820         default "0x00001000"
 821         help
 822           This sets the default offset of zero page.
 823
 824 config BOOT_LINK_OFFSET
 825         hex
 826         default "0x00210000" if SH_SHMIN
 827         default "0x00400000" if SH_CAYMAN
 828         default "0x00810000" if SH_7780_SOLUTION_ENGINE
 829         default "0x009e0000" if SH_TITAN
 830         default "0x01800000" if SH_SDK7780
 831         default "0x02000000" if SH_EDOSK7760
 832         default "0x00800000"
 833         help
 834           This option allows you to set the link address offset of the zImage.
 835           This can be useful if you are on a board which has a small amount of
 836           memory.
 837
 838 config ENTRY_OFFSET
 839         hex
 840         default "0x00001000" if PAGE_SIZE_4KB
 841         default "0x00002000" if PAGE_SIZE_8KB
 842         default "0x00004000" if PAGE_SIZE_16KB
 843         default "0x00010000" if PAGE_SIZE_64KB
 844         default "0x00000000"
 845
 846 config ROMIMAGE_MMCIF
 847         bool "Include MMCIF loader in romImage (EXPERIMENTAL)"
 848         depends on CPU_SUBTYPE_SH7724 && EXPERIMENTAL
 849         help
 850           Say Y here to include experimental MMCIF loading code in
 851           romImage. With this enabled it is possible to write the romImage
 852           kernel image to an MMC card and boot the kernel straight from
 853           the reset vector. At reset the processor Mask ROM will load the
 854           first part of the romImage which in turn loads the rest the kernel
 855           image to RAM using the MMCIF hardware block.
 856
 857 choice
 858         prompt "Kernel command line"
 859         optional
 860         default CMDLINE_OVERWRITE
 861         help
 862           Setting this option allows the kernel command line arguments
 863           to be set.
 864
 865 config CMDLINE_OVERWRITE
 866         bool "Overwrite bootloader kernel arguments"
 867         help
 868           Given string will overwrite any arguments passed in by
 869           a bootloader.
 870
 871 config CMDLINE_EXTEND
 872         bool "Extend bootloader kernel arguments"
 873         help
 874           Given string will be concatenated with arguments passed in
 875           by a bootloader.
 876
 877 endchoice
 878
 879 config CMDLINE
 880         string "Kernel command line arguments string"
 881         depends on CMDLINE_OVERWRITE || CMDLINE_EXTEND
 882         default "console=ttySC1,115200"
 883
 884 endmenu
 885
 886 menu "Bus options"
 887
 888 config SUPERHYWAY
 889         tristate "SuperHyway Bus support"
 890         depends on CPU_SUBTYPE_SH4_202
 891
 892 config MAPLE
 893         bool "Maple Bus support"
 894         depends on SH_DREAMCAST
 895         help
 896          The Maple Bus is SEGA's serial communication bus for peripherals
 897          on the Dreamcast. Without this bus support you won't be able to
 898          get your Dreamcast keyboard etc to work, so most users
 899          probably want to say 'Y' here, unless you are only using the
 900          Dreamcast with a serial line terminal or a remote network
 901          connection.
 902
 903 config PCI
 904         bool "PCI support"
 905         depends on SYS_SUPPORTS_PCI
 906         select PCI_DOMAINS
 907         select GENERIC_PCI_IOMAP
 908         select NO_GENERIC_PCI_IOPORT_MAP
 909         help
 910           Find out whether you have a PCI motherboard. PCI is the name of a
 911           bus system, i.e. the way the CPU talks to the other stuff inside
 912           your box. If you have PCI, say Y, otherwise N.
 913
 914 config PCI_DOMAINS
 915         bool
 916
 917 source "drivers/pci/pcie/Kconfig"
 918
 919 source "drivers/pci/Kconfig"
 920
 921 source "drivers/pcmcia/Kconfig"
 922
 923 source "drivers/pci/hotplug/Kconfig"
 924
 925 endmenu
 926
 927 menu "Executable file formats"
 928
 929 source "fs/Kconfig.binfmt"
 930
 931 endmenu
 932
 933 menu "Power management options (EXPERIMENTAL)"
 934 depends on EXPERIMENTAL
 935
 936 source "kernel/power/Kconfig"
 937
 938 source "drivers/cpuidle/Kconfig"
 939
 940 endmenu
 941
 942 source "net/Kconfig"
 943
 944 source "drivers/Kconfig"
 945
 946 source "fs/Kconfig"
 947
 948 source "arch/sh/Kconfig.debug"
 949
 950 source "security/Kconfig"
 951
 952 source "crypto/Kconfig"
 953
 954 source "lib/Kconfig"