arch/sh/Kconfig

   1 config SUPERH
   2         def_bool y
   3         select EMBEDDED
   4         select HAVE_CLK
   5         select HAVE_IDE if HAS_IOPORT
   6         select HAVE_MEMBLOCK
   7         select HAVE_OPROFILE
   8         select HAVE_GENERIC_DMA_COHERENT
   9         select HAVE_ARCH_TRACEHOOK
  10         select HAVE_DMA_API_DEBUG
  11         select HAVE_DMA_ATTRS
  12         select HAVE_PERF_EVENTS
  13         select PERF_USE_VMALLOC
  14         select HAVE_KERNEL_GZIP
  15         select HAVE_KERNEL_BZIP2
  16         select HAVE_KERNEL_LZMA
  17         select HAVE_KERNEL_LZO
  18         select HAVE_SYSCALL_TRACEPOINTS
  19         select RTC_LIB
  20         select GENERIC_ATOMIC64
  21         help
  22           The SuperH is a RISC processor targeted for use in embedded systems
  23           and consumer electronics; it was also used in the Sega Dreamcast
  24           gaming console.  The SuperH port has a home page at
  25           <http://www.linux-sh.org/>.
  26
  27 config SUPERH32
  28         def_bool ARCH = "sh"
  29         select HAVE_KPROBES
  30         select HAVE_KRETPROBES
  31         select HAVE_IOREMAP_PROT if MMU && !X2TLB
  32         select HAVE_FUNCTION_TRACER
  33         select HAVE_FTRACE_MCOUNT_RECORD
  34         select HAVE_DYNAMIC_FTRACE
  35         select HAVE_FUNCTION_TRACE_MCOUNT_TEST
  36         select HAVE_FTRACE_NMI_ENTER if DYNAMIC_FTRACE
  37         select HAVE_FUNCTION_GRAPH_TRACER
  38         select HAVE_ARCH_KGDB
  39         select HAVE_HW_BREAKPOINT
  40         select HAVE_MIXED_BREAKPOINTS_REGS
  41         select PERF_EVENTS if HAVE_HW_BREAKPOINT
  42         select ARCH_HIBERNATION_POSSIBLE if MMU
  43
  44 config SUPERH64
  45         def_bool ARCH = "sh64"
  46
  47 config ARCH_DEFCONFIG
  48         string
  49         default "arch/sh/configs/shx3_defconfig" if SUPERH32
  50         default "arch/sh/configs/cayman_defconfig" if SUPERH64
  51
  52 config RWSEM_GENERIC_SPINLOCK
  53         def_bool y
  54
  55 config RWSEM_XCHGADD_ALGORITHM
  56         bool
  57
  58 config GENERIC_BUG
  59         def_bool y
  60         depends on BUG && SUPERH32
  61
  62 config GENERIC_CSUM
  63         def_bool y
  64         depends on SUPERH64
  65
  66 config GENERIC_FIND_NEXT_BIT
  67         def_bool y
  68
  69 config GENERIC_HWEIGHT
  70         def_bool y
  71
  72 config GENERIC_HARDIRQS
  73         def_bool y
  74
  75 config GENERIC_HARDIRQS_NO__DO_IRQ
  76         def_bool y
  77
  78 config IRQ_PER_CPU
  79         def_bool y
  80
  81 config SPARSE_IRQ
  82         def_bool y
  83         depends on SUPERH32
  84
  85 config GENERIC_GPIO
  86         def_bool n
  87
  88 config GENERIC_CALIBRATE_DELAY
  89         bool
  90
  91 config GENERIC_IOMAP
  92         bool
  93
  94 config GENERIC_CLOCKEVENTS
  95         def_bool y
  96
  97 config GENERIC_CLOCKEVENTS_BROADCAST
  98         bool
  99
 100 config GENERIC_CMOS_UPDATE
 101         def_bool y
 102         depends on SH_SH03 || SH_DREAMCAST
 103
 104 config GENERIC_LOCKBREAK
 105         def_bool y
 106         depends on SMP && PREEMPT
 107
 108 config SYS_SUPPORTS_PM
 109         bool
 110         depends on !SMP
 111
 112 config ARCH_SUSPEND_POSSIBLE
 113         def_bool n
 114
 115 config ARCH_HIBERNATION_POSSIBLE
 116         def_bool n
 117
 118 config SYS_SUPPORTS_APM_EMULATION
 119         bool
 120         select ARCH_SUSPEND_POSSIBLE
 121
 122 config SYS_SUPPORTS_HUGETLBFS
 123         bool
 124
 125 config SYS_SUPPORTS_SMP
 126         bool
 127
 128 config SYS_SUPPORTS_NUMA
 129         bool
 130
 131 config SYS_SUPPORTS_PCI
 132         bool
 133
 134 config SYS_SUPPORTS_CMT
 135         bool
 136
 137 config SYS_SUPPORTS_MTU2
 138         bool
 139
 140 config SYS_SUPPORTS_TMU
 141         bool
 142
 143 config STACKTRACE_SUPPORT
 144         def_bool y
 145
 146 config LOCKDEP_SUPPORT
 147         def_bool y
 148
 149 config HAVE_LATENCYTOP_SUPPORT
 150         def_bool y
 151
 152 config ARCH_HAS_ILOG2_U32
 153         def_bool n
 154
 155 config ARCH_HAS_ILOG2_U64
 156         def_bool n
 157
 158 config ARCH_NO_VIRT_TO_BUS
 159         def_bool y
 160
 161 config ARCH_HAS_DEFAULT_IDLE
 162         def_bool y
 163
 164 config ARCH_HAS_CPU_IDLE_WAIT
 165         def_bool y
 166
 167 config NO_IOPORT
 168         bool
 169
 170 config IO_TRAPPED
 171         bool
 172
 173 config DMA_COHERENT
 174         bool
 175
 176 config DMA_NONCOHERENT
 177         def_bool !DMA_COHERENT
 178
 179 config NEED_DMA_MAP_STATE
 180         def_bool DMA_NONCOHERENT
 181
 182 config NEED_SG_DMA_LENGTH
 183         def_bool y
 184
 185 source "init/Kconfig"
 186
 187 source "kernel/Kconfig.freezer"
 188
 189 menu "System type"
 190
 191 #
 192 # Processor families
 193 #
 194 config CPU_SH2
 195         bool
 196
 197 config CPU_SH2A
 198         bool
 199         select CPU_SH2
 200
 201 config CPU_SH3
 202         bool
 203         select CPU_HAS_INTEVT
 204         select CPU_HAS_SR_RB
 205         select SYS_SUPPORTS_TMU
 206
 207 config CPU_SH4
 208         bool
 209         select CPU_HAS_INTEVT
 210         select CPU_HAS_SR_RB
 211         select CPU_HAS_FPU if !CPU_SH4AL_DSP
 212         select SYS_SUPPORTS_TMU
 213         select SYS_SUPPORTS_HUGETLBFS if MMU
 214
 215 config CPU_SH4A
 216         bool
 217         select CPU_SH4
 218
 219 config CPU_SH4AL_DSP
 220         bool
 221         select CPU_SH4A
 222         select CPU_HAS_DSP
 223
 224 config CPU_SH5
 225         bool
 226         select CPU_HAS_FPU
 227         select SYS_SUPPORTS_TMU
 228         select SYS_SUPPORTS_HUGETLBFS if MMU
 229
 230 config CPU_SHX2
 231         bool
 232
 233 config CPU_SHX3
 234         bool
 235         select DMA_COHERENT
 236         select SYS_SUPPORTS_SMP
 237         select SYS_SUPPORTS_NUMA
 238
 239 config ARCH_SHMOBILE
 240         bool
 241         select ARCH_SUSPEND_POSSIBLE
 242         select PM
 243         select PM_RUNTIME
 244
 245 if SUPERH32
 246
 247 choice
 248         prompt "Processor sub-type selection"
 249
 250 #
 251 # Processor subtypes
 252 #
 253
 254 # SH-2 Processor Support
 255
 256 config CPU_SUBTYPE_SH7619
 257         bool "Support SH7619 processor"
 258         select CPU_SH2
 259         select SYS_SUPPORTS_CMT
 260
 261 # SH-2A Processor Support
 262
 263 config CPU_SUBTYPE_SH7201
 264         bool "Support SH7201 processor"
 265         select CPU_SH2A
 266         select CPU_HAS_FPU
 267         select SYS_SUPPORTS_MTU2
 268
 269 config CPU_SUBTYPE_SH7203
 270         bool "Support SH7203 processor"
 271         select CPU_SH2A
 272         select CPU_HAS_FPU
 273         select SYS_SUPPORTS_CMT
 274         select SYS_SUPPORTS_MTU2
 275
 276 config CPU_SUBTYPE_SH7206
 277         bool "Support SH7206 processor"
 278         select CPU_SH2A
 279         select SYS_SUPPORTS_CMT
 280         select SYS_SUPPORTS_MTU2
 281
 282 config CPU_SUBTYPE_SH7263
 283         bool "Support SH7263 processor"
 284         select CPU_SH2A
 285         select CPU_HAS_FPU
 286         select SYS_SUPPORTS_CMT
 287         select SYS_SUPPORTS_MTU2
 288
 289 config CPU_SUBTYPE_MXG
 290         bool "Support MX-G processor"
 291         select CPU_SH2A
 292         select SYS_SUPPORTS_MTU2
 293         help
 294           Select MX-G if running on an R8A03022BG part.
 295
 296 # SH-3 Processor Support
 297
 298 config CPU_SUBTYPE_SH7705
 299         bool "Support SH7705 processor"
 300         select CPU_SH3
 301
 302 config CPU_SUBTYPE_SH7706
 303         bool "Support SH7706 processor"
 304         select CPU_SH3
 305         help
 306           Select SH7706 if you have a 133 Mhz SH-3 HD6417706 CPU.
 307
 308 config CPU_SUBTYPE_SH7707
 309         bool "Support SH7707 processor"
 310         select CPU_SH3
 311         help
 312           Select SH7707 if you have a  60 Mhz SH-3 HD6417707 CPU.
 313
 314 config CPU_SUBTYPE_SH7708
 315         bool "Support SH7708 processor"
 316         select CPU_SH3
 317         help
 318           Select SH7708 if you have a  60 Mhz SH-3 HD6417708S or
 319           if you have a 100 Mhz SH-3 HD6417708R CPU.
 320
 321 config CPU_SUBTYPE_SH7709
 322         bool "Support SH7709 processor"
 323         select CPU_SH3
 324         help
 325           Select SH7709 if you have a  80 Mhz SH-3 HD6417709 CPU.
 326
 327 config CPU_SUBTYPE_SH7710
 328         bool "Support SH7710 processor"
 329         select CPU_SH3
 330         select CPU_HAS_DSP
 331         help
 332           Select SH7710 if you have a SH3-DSP SH7710 CPU.
 333
 334 config CPU_SUBTYPE_SH7712
 335         bool "Support SH7712 processor"
 336         select CPU_SH3
 337         select CPU_HAS_DSP
 338         help
 339           Select SH7712 if you have a SH3-DSP SH7712 CPU.
 340
 341 config CPU_SUBTYPE_SH7720
 342         bool "Support SH7720 processor"
 343         select CPU_SH3
 344         select CPU_HAS_DSP
 345         select SYS_SUPPORTS_CMT
 346         help
 347           Select SH7720 if you have a SH3-DSP SH7720 CPU.
 348
 349 config CPU_SUBTYPE_SH7721
 350         bool "Support SH7721 processor"
 351         select CPU_SH3
 352         select CPU_HAS_DSP
 353         select SYS_SUPPORTS_CMT
 354         help
 355           Select SH7721 if you have a SH3-DSP SH7721 CPU.
 356
 357 # SH-4 Processor Support
 358
 359 config CPU_SUBTYPE_SH7750
 360         bool "Support SH7750 processor"
 361         select CPU_SH4
 362         help
 363           Select SH7750 if you have a 200 Mhz SH-4 HD6417750 CPU.
 364
 365 config CPU_SUBTYPE_SH7091
 366         bool "Support SH7091 processor"
 367         select CPU_SH4
 368         help
 369           Select SH7091 if you have an SH-4 based Sega device (such as
 370           the Dreamcast, Naomi, and Naomi 2).
 371
 372 config CPU_SUBTYPE_SH7750R
 373         bool "Support SH7750R processor"
 374         select CPU_SH4
 375
 376 config CPU_SUBTYPE_SH7750S
 377         bool "Support SH7750S processor"
 378         select CPU_SH4
 379
 380 config CPU_SUBTYPE_SH7751
 381         bool "Support SH7751 processor"
 382         select CPU_SH4
 383         help
 384           Select SH7751 if you have a 166 Mhz SH-4 HD6417751 CPU,
 385           or if you have a HD6417751R CPU.
 386
 387 config CPU_SUBTYPE_SH7751R
 388         bool "Support SH7751R processor"
 389         select CPU_SH4
 390
 391 config CPU_SUBTYPE_SH7760
 392         bool "Support SH7760 processor"
 393         select CPU_SH4
 394
 395 config CPU_SUBTYPE_SH4_202
 396         bool "Support SH4-202 processor"
 397         select CPU_SH4
 398
 399 # SH-4A Processor Support
 400
 401 config CPU_SUBTYPE_SH7723
 402         bool "Support SH7723 processor"
 403         select CPU_SH4A
 404         select CPU_SHX2
 405         select ARCH_SHMOBILE
 406         select ARCH_SPARSEMEM_ENABLE
 407         select SYS_SUPPORTS_CMT
 408         help
 409           Select SH7723 if you have an SH-MobileR2 CPU.
 410
 411 config CPU_SUBTYPE_SH7724
 412         bool "Support SH7724 processor"
 413         select CPU_SH4A
 414         select CPU_SHX2
 415         select ARCH_SHMOBILE
 416         select ARCH_SPARSEMEM_ENABLE
 417         select SYS_SUPPORTS_CMT
 418         help
 419           Select SH7724 if you have an SH-MobileR2R CPU.
 420
 421 config CPU_SUBTYPE_SH7757
 422         bool "Support SH7757 processor"
 423         select CPU_SH4A
 424         select CPU_SHX2
 425         help
 426           Select SH7757 if you have a SH4A SH7757 CPU.
 427
 428 config CPU_SUBTYPE_SH7763
 429         bool "Support SH7763 processor"
 430         select CPU_SH4A
 431         help
 432           Select SH7763 if you have a SH4A SH7763(R5S77631) CPU.
 433
 434 config CPU_SUBTYPE_SH7770
 435         bool "Support SH7770 processor"
 436         select CPU_SH4A
 437
 438 config CPU_SUBTYPE_SH7780
 439         bool "Support SH7780 processor"
 440         select CPU_SH4A
 441
 442 config CPU_SUBTYPE_SH7785
 443         bool "Support SH7785 processor"
 444         select CPU_SH4A
 445         select CPU_SHX2
 446         select ARCH_SPARSEMEM_ENABLE
 447         select SYS_SUPPORTS_NUMA
 448
 449 config CPU_SUBTYPE_SH7786
 450         bool "Support SH7786 processor"
 451         select CPU_SH4A
 452         select CPU_SHX3
 453         select CPU_HAS_PTEAEX
 454         select GENERIC_CLOCKEVENTS_BROADCAST if SMP
 455
 456 config CPU_SUBTYPE_SHX3
 457         bool "Support SH-X3 processor"
 458         select CPU_SH4A
 459         select CPU_SHX3
 460         select GENERIC_CLOCKEVENTS_BROADCAST if SMP
 461
 462 # SH4AL-DSP Processor Support
 463
 464 config CPU_SUBTYPE_SH7343
 465         bool "Support SH7343 processor"
 466         select CPU_SH4AL_DSP
 467         select ARCH_SHMOBILE
 468         select SYS_SUPPORTS_CMT
 469
 470 config CPU_SUBTYPE_SH7722
 471         bool "Support SH7722 processor"
 472         select CPU_SH4AL_DSP
 473         select CPU_SHX2
 474         select ARCH_SHMOBILE
 475         select ARCH_SPARSEMEM_ENABLE
 476         select SYS_SUPPORTS_NUMA
 477         select SYS_SUPPORTS_CMT
 478
 479 config CPU_SUBTYPE_SH7366
 480         bool "Support SH7366 processor"
 481         select CPU_SH4AL_DSP
 482         select CPU_SHX2
 483         select ARCH_SHMOBILE
 484         select ARCH_SPARSEMEM_ENABLE
 485         select SYS_SUPPORTS_NUMA
 486         select SYS_SUPPORTS_CMT
 487
 488 endchoice
 489
 490 endif
 491
 492 if SUPERH64
 493
 494 choice
 495         prompt "Processor sub-type selection"
 496
 497 # SH-5 Processor Support
 498
 499 config CPU_SUBTYPE_SH5_101
 500         bool "Support SH5-101 processor"
 501         select CPU_SH5
 502
 503 config CPU_SUBTYPE_SH5_103
 504         bool "Support SH5-103 processor"
 505         select CPU_SH5
 506
 507 endchoice
 508
 509 endif
 510
 511 source "arch/sh/mm/Kconfig"
 512
 513 source "arch/sh/Kconfig.cpu"
 514
 515 source "arch/sh/boards/Kconfig"
 516
 517 menu "Timer and clock configuration"
 518
 519 config SH_TIMER_TMU
 520         bool "TMU timer driver"
 521         depends on SYS_SUPPORTS_TMU
 522         default y
 523         help
 524           This enables the build of the TMU timer driver.
 525
 526 config SH_TIMER_CMT
 527         bool "CMT timer driver"
 528         depends on SYS_SUPPORTS_CMT
 529         default y
 530         help
 531           This enables build of the CMT timer driver.
 532
 533 config SH_TIMER_MTU2
 534         bool "MTU2 timer driver"
 535         depends on SYS_SUPPORTS_MTU2
 536         default y
 537         help
 538           This enables build of the MTU2 timer driver.
 539
 540 config SH_PCLK_FREQ
 541         int "Peripheral clock frequency (in Hz)"
 542         depends on SH_CLK_CPG_LEGACY
 543         default "31250000" if CPU_SUBTYPE_SH7619
 544         default "33333333" if CPU_SUBTYPE_SH7770 || \
 545                               CPU_SUBTYPE_SH7760 || \
 546                               CPU_SUBTYPE_SH7705 || \
 547                               CPU_SUBTYPE_SH7203 || \
 548                               CPU_SUBTYPE_SH7206 || \
 549                               CPU_SUBTYPE_SH7263 || \
 550                               CPU_SUBTYPE_MXG
 551         default "60000000" if CPU_SUBTYPE_SH7751 || CPU_SUBTYPE_SH7751R
 552         default "66000000" if CPU_SUBTYPE_SH4_202
 553         default "50000000"
 554         help
 555           This option is used to specify the peripheral clock frequency.
 556           This is necessary for determining the reference clock value on
 557           platforms lacking an RTC.
 558
 559 config SH_CLK_CPG
 560         def_bool y
 561
 562 config SH_CLK_CPG_LEGACY
 563         depends on SH_CLK_CPG
 564         def_bool y if !CPU_SUBTYPE_SH7785 && !ARCH_SHMOBILE && \
 565                       !CPU_SUBTYPE_SH7786
 566
 567 config SH_CLK_MD
 568         int "CPU Mode Pin Setting"
 569         depends on CPU_SH2
 570         default 6 if CPU_SUBTYPE_SH7206
 571         default 5 if CPU_SUBTYPE_SH7619
 572         default 0
 573         help
 574           MD2 - MD0 pin setting.
 575
 576 source "kernel/time/Kconfig"
 577
 578 endmenu
 579
 580 menu "CPU Frequency scaling"
 581
 582 source "drivers/cpufreq/Kconfig"
 583
 584 config SH_CPU_FREQ
 585         tristate "SuperH CPU Frequency driver"
 586         depends on CPU_FREQ
 587         select CPU_FREQ_TABLE
 588         help
 589           This adds the cpufreq driver for SuperH. Any CPU that supports
 590           clock rate rounding through the clock framework can use this
 591           driver. While it will make the kernel slightly larger, this is
 592           harmless for CPUs that don't support rate rounding. The driver
 593           will also generate a notice in the boot log before disabling
 594           itself if the CPU in question is not capable of rate rounding.
 595
 596           For details, take a look at <file:Documentation/cpu-freq>.
 597
 598           If unsure, say N.
 599
 600 endmenu
 601
 602 source "arch/sh/drivers/Kconfig"
 603
 604 endmenu
 605
 606 menu "Kernel features"
 607
 608 source kernel/Kconfig.hz
 609
 610 config KEXEC
 611         bool "kexec system call (EXPERIMENTAL)"
 612         depends on SUPERH32 && EXPERIMENTAL && MMU
 613         help
 614           kexec is a system call that implements the ability to shutdown your
 615           current kernel, and to start another kernel.  It is like a reboot
 616           but it is independent of the system firmware.  And like a reboot
 617           you can start any kernel with it, not just Linux.
 618
 619           The name comes from the similarity to the exec system call.
 620
 621           It is an ongoing process to be certain the hardware in a machine
 622           is properly shutdown, so do not be surprised if this code does not
 623           initially work for you.  It may help to enable device hotplugging
 624           support.  As of this writing the exact hardware interface is
 625           strongly in flux, so no good recommendation can be made.
 626
 627 config CRASH_DUMP
 628         bool "kernel crash dumps (EXPERIMENTAL)"
 629         depends on SUPERH32 && EXPERIMENTAL && BROKEN_ON_SMP
 630         help
 631           Generate crash dump after being started by kexec.
 632           This should be normally only set in special crash dump kernels
 633           which are loaded in the main kernel with kexec-tools into
 634           a specially reserved region and then later executed after
 635           a crash by kdump/kexec. The crash dump kernel must be compiled
 636           to a memory address not used by the main kernel using
 637           MEMORY_START.
 638
 639           For more details see Documentation/kdump/kdump.txt
 640
 641 config KEXEC_JUMP
 642         bool "kexec jump (EXPERIMENTAL)"
 643         depends on SUPERH32 && KEXEC && HIBERNATION && EXPERIMENTAL
 644         help
 645           Jump between original kernel and kexeced kernel and invoke
 646           code via KEXEC
 647
 648 config SECCOMP
 649         bool "Enable seccomp to safely compute untrusted bytecode"
 650         depends on PROC_FS
 651         help
 652           This kernel feature is useful for number crunching applications
 653           that may need to compute untrusted bytecode during their
 654           execution. By using pipes or other transports made available to
 655           the process as file descriptors supporting the read/write
 656           syscalls, it's possible to isolate those applications in
 657           their own address space using seccomp. Once seccomp is
 658           enabled via prctl, it cannot be disabled and the task is only
 659           allowed to execute a few safe syscalls defined by each seccomp
 660           mode.
 661
 662           If unsure, say N.
 663
 664 config SMP
 665         bool "Symmetric multi-processing support"
 666         depends on SYS_SUPPORTS_SMP
 667         select USE_GENERIC_SMP_HELPERS
 668         ---help---
 669           This enables support for systems with more than one CPU. If you have
 670           a system with only one CPU, like most personal computers, say N. If
 671           you have a system with more than one CPU, say Y.
 672
 673           If you say N here, the kernel will run on single and multiprocessor
 674           machines, but will use only one CPU of a multiprocessor machine. If
 675           you say Y here, the kernel will run on many, but not all,
 676           singleprocessor machines. On a singleprocessor machine, the kernel
 677           will run faster if you say N here.
 678
 679           People using multiprocessor machines who say Y here should also say
 680           Y to "Enhanced Real Time Clock Support", below.
 681
 682           See also <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO
 683           available at <http://www.tldp.org/docs.html#howto>.
 684
 685           If you don't know what to do here, say N.
 686
 687 config NR_CPUS
 688         int "Maximum number of CPUs (2-32)"
 689         range 2 32
 690         depends on SMP
 691         default "4" if CPU_SUBTYPE_SHX3
 692         default "2"
 693         help
 694           This allows you to specify the maximum number of CPUs which this
 695           kernel will support.  The maximum supported value is 32 and the
 696           minimum value which makes sense is 2.
 697
 698           This is purely to save memory - each supported CPU adds
 699           approximately eight kilobytes to the kernel image.
 700
 701 config HOTPLUG_CPU
 702         bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
 703         depends on SMP && HOTPLUG && EXPERIMENTAL
 704         help
 705           Say Y here to experiment with turning CPUs off and on.  CPUs
 706           can be controlled through /sys/devices/system/cpu.
 707
 708 source "kernel/Kconfig.preempt"
 709
 710 config GUSA
 711         def_bool y
 712         depends on !SMP && SUPERH32
 713         help
 714           This enables support for gUSA (general UserSpace Atomicity).
 715           This is the default implementation for both UP and non-ll/sc
 716           CPUs, and is used by the libc, amongst others.
 717
 718           For additional information, design information can be found
 719           in <http://lc.linux.or.jp/lc2002/papers/niibe0919p.pdf>.
 720
 721           This should only be disabled for special cases where alternate
 722           atomicity implementations exist.
 723
 724 config GUSA_RB
 725         bool "Implement atomic operations by roll-back (gRB) (EXPERIMENTAL)"
 726         depends on GUSA && CPU_SH3 || (CPU_SH4 && !CPU_SH4A)
 727         help
 728           Enabling this option will allow the kernel to implement some
 729           atomic operations using a software implementation of load-locked/
 730           store-conditional (LLSC). On machines which do not have hardware
 731           LLSC, this should be more efficient than the other alternative of
 732           disabling interrupts around the atomic sequence.
 733
 734 source "drivers/sh/Kconfig"
 735
 736 endmenu
 737
 738 menu "Boot options"
 739
 740 config ZERO_PAGE_OFFSET
 741         hex
 742         default "0x00010000" if PAGE_SIZE_64KB || SH_RTS7751R2D || \
 743                                 SH_7751_SOLUTION_ENGINE
 744         default "0x00004000" if PAGE_SIZE_16KB || SH_SH03
 745         default "0x00002000" if PAGE_SIZE_8KB
 746         default "0x00001000"
 747         help
 748           This sets the default offset of zero page.
 749
 750 config BOOT_LINK_OFFSET
 751         hex
 752         default "0x00210000" if SH_SHMIN
 753         default "0x00400000" if SH_CAYMAN
 754         default "0x00810000" if SH_7780_SOLUTION_ENGINE
 755         default "0x009e0000" if SH_TITAN
 756         default "0x01800000" if SH_SDK7780
 757         default "0x02000000" if SH_EDOSK7760
 758         default "0x00800000"
 759         help
 760           This option allows you to set the link address offset of the zImage.
 761           This can be useful if you are on a board which has a small amount of
 762           memory.
 763
 764 config ENTRY_OFFSET
 765         hex
 766         default "0x00001000" if PAGE_SIZE_4KB
 767         default "0x00002000" if PAGE_SIZE_8KB
 768         default "0x00004000" if PAGE_SIZE_16KB
 769         default "0x00010000" if PAGE_SIZE_64KB
 770         default "0x00000000"
 771
 772 config ROMIMAGE_MMCIF
 773         bool "Include MMCIF loader in romImage (EXPERIMENTAL)"
 774         depends on CPU_SUBTYPE_SH7724 && EXPERIMENTAL
 775         help
 776           Say Y here to include experimental MMCIF loading code in
 777           romImage. With this enabled it is possible to write the romImage
 778           kernel image to an MMC card and boot the kernel straight from
 779           the reset vector. At reset the processor Mask ROM will load the
 780           first part of the romImage which in turn loads the rest the kernel
 781           image to RAM using the MMCIF hardware block.
 782
 783 choice
 784         prompt "Kernel command line"
 785         optional
 786         default CMDLINE_OVERWRITE
 787         help
 788           Setting this option allows the kernel command line arguments
 789           to be set.
 790
 791 config CMDLINE_OVERWRITE
 792         bool "Overwrite bootloader kernel arguments"
 793         help
 794           Given string will overwrite any arguments passed in by
 795           a bootloader.
 796
 797 config CMDLINE_EXTEND
 798         bool "Extend bootloader kernel arguments"
 799         help
 800           Given string will be concatenated with arguments passed in
 801           by a bootloader.
 802
 803 endchoice
 804
 805 config CMDLINE
 806         string "Kernel command line arguments string"
 807         depends on CMDLINE_OVERWRITE || CMDLINE_EXTEND
 808         default "console=ttySC1,115200"
 809
 810 endmenu
 811
 812 menu "Bus options"
 813
 814 config SUPERHYWAY
 815         tristate "SuperHyway Bus support"
 816         depends on CPU_SUBTYPE_SH4_202
 817
 818 config MAPLE
 819         bool "Maple Bus support"
 820         depends on SH_DREAMCAST
 821         help
 822          The Maple Bus is SEGA's serial communication bus for peripherals
 823          on the Dreamcast. Without this bus support you won't be able to
 824          get your Dreamcast keyboard etc to work, so most users
 825          probably want to say 'Y' here, unless you are only using the
 826          Dreamcast with a serial line terminal or a remote network
 827          connection.
 828
 829 config PCI
 830         bool "PCI support"
 831         depends on SYS_SUPPORTS_PCI
 832         select PCI_DOMAINS
 833         help
 834           Find out whether you have a PCI motherboard. PCI is the name of a
 835           bus system, i.e. the way the CPU talks to the other stuff inside
 836           your box. If you have PCI, say Y, otherwise N.
 837
 838 config PCI_DOMAINS
 839         bool
 840
 841 source "drivers/pci/pcie/Kconfig"
 842
 843 source "drivers/pci/Kconfig"
 844
 845 source "drivers/pcmcia/Kconfig"
 846
 847 source "drivers/pci/hotplug/Kconfig"
 848
 849 endmenu
 850
 851 menu "Executable file formats"
 852
 853 source "fs/Kconfig.binfmt"
 854
 855 endmenu
 856
 857 menu "Power management options (EXPERIMENTAL)"
 858 depends on EXPERIMENTAL
 859
 860 source "kernel/power/Kconfig"
 861
 862 source "drivers/cpuidle/Kconfig"
 863
 864 endmenu
 865
 866 source "net/Kconfig"
 867
 868 source "drivers/Kconfig"
 869
 870 source "fs/Kconfig"
 871
 872 source "arch/sh/Kconfig.debug"
 873
 874 source "security/Kconfig"
 875
 876 source "crypto/Kconfig"
 877
 878 menuconfig VIRTUALIZATION
 879         bool "Virtualization"
 880         default n
 881         ---help---
 882           Say Y here to get to see options for using your Linux host to run other
 883           operating systems inside virtual machines (guests).
 884           This option alone does not add any kernel code.
 885
 886           If you say N, all options in this submenu will be skipped and disabled.
 887
 888 if VIRTUALIZATION
 889
 890 source drivers/virtio/Kconfig
 891
 892 endif # VIRTUALIZATION
 893
 894 source "lib/Kconfig"