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