arch/sh/Kconfig

   1 # SPDX-License-Identifier: GPL-2.0
   2 config SUPERH
   3         def_bool y
   4         select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
   5         select ARCH_MIGHT_HAVE_PC_PARPORT
   6         select ARCH_NO_COHERENT_DMA_MMAP if !MMU
   7         select HAVE_PATA_PLATFORM
   8         select CLKDEV_LOOKUP
   9         select HAVE_IDE if HAS_IOPORT_MAP
  10         select HAVE_MEMBLOCK
  11         select HAVE_MEMBLOCK_NODE_MAP
  12         select ARCH_DISCARD_MEMBLOCK
  13         select HAVE_OPROFILE
  14         select HAVE_GENERIC_DMA_COHERENT
  15         select HAVE_ARCH_TRACEHOOK
  16         select HAVE_DMA_API_DEBUG
  17         select HAVE_PERF_EVENTS
  18         select HAVE_DEBUG_BUGVERBOSE
  19         select ARCH_HAVE_CUSTOM_GPIO_H
  20         select ARCH_HAVE_NMI_SAFE_CMPXCHG if (GUSA_RB || CPU_SH4A)
  21         select ARCH_HAS_GCOV_PROFILE_ALL
  22         select PERF_USE_VMALLOC
  23         select HAVE_DEBUG_KMEMLEAK
  24         select HAVE_KERNEL_GZIP
  25         select CPU_NO_EFFICIENT_FFS
  26         select HAVE_KERNEL_BZIP2
  27         select HAVE_KERNEL_LZMA
  28         select HAVE_KERNEL_XZ
  29         select HAVE_KERNEL_LZO
  30         select HAVE_UID16
  31         select ARCH_WANT_IPC_PARSE_VERSION
  32         select HAVE_SYSCALL_TRACEPOINTS
  33         select HAVE_REGS_AND_STACK_ACCESS_API
  34         select MAY_HAVE_SPARSE_IRQ
  35         select IRQ_FORCED_THREADING
  36         select RTC_LIB
  37         select GENERIC_ATOMIC64
  38         select GENERIC_IRQ_SHOW
  39         select GENERIC_SMP_IDLE_THREAD
  40         select GENERIC_IDLE_POLL_SETUP
  41         select GENERIC_CLOCKEVENTS
  42         select GENERIC_CMOS_UPDATE if SH_SH03 || SH_DREAMCAST
  43         select GENERIC_SCHED_CLOCK
  44         select GENERIC_STRNCPY_FROM_USER
  45         select GENERIC_STRNLEN_USER
  46         select HAVE_MOD_ARCH_SPECIFIC if DWARF_UNWINDER
  47         select MODULES_USE_ELF_RELA
  48         select OLD_SIGSUSPEND
  49         select OLD_SIGACTION
  50         select HAVE_ARCH_AUDITSYSCALL
  51         select HAVE_FUTEX_CMPXCHG if FUTEX
  52         select HAVE_NMI
  53         help
  54           The SuperH is a RISC processor targeted for use in embedded systems
  55           and consumer electronics; it was also used in the Sega Dreamcast
  56           gaming console.  The SuperH port has a home page at
  57           <http://www.linux-sh.org/>.
  58
  59 config SUPERH32
  60         def_bool ARCH = "sh"
  61         select HAVE_KPROBES
  62         select HAVE_KRETPROBES
  63         select HAVE_IOREMAP_PROT if MMU && !X2TLB
  64         select HAVE_FUNCTION_TRACER
  65         select HAVE_FTRACE_MCOUNT_RECORD
  66         select HAVE_DYNAMIC_FTRACE
  67         select HAVE_FTRACE_NMI_ENTER if DYNAMIC_FTRACE
  68         select ARCH_WANT_IPC_PARSE_VERSION
  69         select HAVE_FUNCTION_GRAPH_TRACER
  70         select HAVE_ARCH_KGDB
  71         select HAVE_HW_BREAKPOINT
  72         select HAVE_MIXED_BREAKPOINTS_REGS
  73         select PERF_EVENTS
  74         select ARCH_HIBERNATION_POSSIBLE if MMU
  75         select SPARSE_IRQ
  76         select HAVE_CC_STACKPROTECTOR
  77
  78 config SUPERH64
  79         def_bool ARCH = "sh64"
  80         select HAVE_EXIT_THREAD
  81         select KALLSYMS
  82
  83 config ARCH_DEFCONFIG
  84         string
  85         default "arch/sh/configs/shx3_defconfig" if SUPERH32
  86         default "arch/sh/configs/cayman_defconfig" if SUPERH64
  87
  88 config RWSEM_GENERIC_SPINLOCK
  89         def_bool y
  90
  91 config RWSEM_XCHGADD_ALGORITHM
  92         bool
  93
  94 config GENERIC_BUG
  95         def_bool y
  96         depends on BUG && SUPERH32
  97
  98 config GENERIC_CSUM
  99         def_bool y
 100         depends on SUPERH64
 101
 102 config GENERIC_HWEIGHT
 103         def_bool y
 104
 105 config GENERIC_CALIBRATE_DELAY
 106         bool
 107
 108 config GENERIC_LOCKBREAK
 109         def_bool y
 110         depends on SMP && PREEMPT
 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 STACKTRACE_SUPPORT
 135         def_bool y
 136
 137 config LOCKDEP_SUPPORT
 138         def_bool y
 139
 140 config ARCH_HAS_ILOG2_U32
 141         def_bool n
 142
 143 config ARCH_HAS_ILOG2_U64
 144         def_bool n
 145
 146 config NO_IOPORT_MAP
 147         def_bool !PCI
 148         depends on !SH_CAYMAN && !SH_SH4202_MICRODEV && !SH_SHMIN && \
 149                    !SH_HP6XX && !SH_SOLUTION_ENGINE
 150
 151 config IO_TRAPPED
 152         bool
 153
 154 config SWAP_IO_SPACE
 155         bool
 156
 157 config DMA_COHERENT
 158         bool
 159
 160 config DMA_NONCOHERENT
 161         def_bool !DMA_COHERENT
 162
 163 config NEED_DMA_MAP_STATE
 164         def_bool DMA_NONCOHERENT
 165
 166 config NEED_SG_DMA_LENGTH
 167         def_bool y
 168
 169 config PGTABLE_LEVELS
 170         default 3 if X2TLB
 171         default 2
 172
 173 source "init/Kconfig"
 174
 175 source "kernel/Kconfig.freezer"
 176
 177 menu "System type"
 178
 179 #
 180 # Processor families
 181 #
 182 config CPU_SH2
 183         bool
 184         select SH_INTC
 185
 186 config CPU_SH2A
 187         bool
 188         select CPU_SH2
 189         select UNCACHED_MAPPING
 190
 191 config CPU_J2
 192         bool
 193         select CPU_SH2
 194         select OF
 195         select OF_EARLY_FLATTREE
 196
 197 config CPU_SH3
 198         bool
 199         select CPU_HAS_INTEVT
 200         select CPU_HAS_SR_RB
 201         select SH_INTC
 202         select SYS_SUPPORTS_SH_TMU
 203
 204 config CPU_SH4
 205         bool
 206         select CPU_HAS_INTEVT
 207         select CPU_HAS_SR_RB
 208         select CPU_HAS_FPU if !CPU_SH4AL_DSP
 209         select SH_INTC
 210         select SYS_SUPPORTS_SH_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_SH_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
 242 config CPU_HAS_PMU
 243        depends on CPU_SH4 || CPU_SH4A
 244        default y
 245        bool
 246
 247 if SUPERH32
 248
 249 choice
 250         prompt "Processor sub-type selection"
 251
 252 #
 253 # Processor subtypes
 254 #
 255
 256 # SH-2 Processor Support
 257
 258 config CPU_SUBTYPE_SH7619
 259         bool "Support SH7619 processor"
 260         select CPU_SH2
 261         select SYS_SUPPORTS_SH_CMT
 262
 263 config CPU_SUBTYPE_J2
 264         bool "Support J2 processor"
 265         select CPU_J2
 266         select SYS_SUPPORTS_SMP
 267         select GENERIC_CLOCKEVENTS_BROADCAST if SMP
 268
 269 # SH-2A Processor Support
 270
 271 config CPU_SUBTYPE_SH7201
 272         bool "Support SH7201 processor"
 273         select CPU_SH2A
 274         select CPU_HAS_FPU
 275         select SYS_SUPPORTS_SH_MTU2
 276
 277 config CPU_SUBTYPE_SH7203
 278         bool "Support SH7203 processor"
 279         select CPU_SH2A
 280         select CPU_HAS_FPU
 281         select SYS_SUPPORTS_SH_CMT
 282         select SYS_SUPPORTS_SH_MTU2
 283         select PINCTRL
 284
 285 config CPU_SUBTYPE_SH7206
 286         bool "Support SH7206 processor"
 287         select CPU_SH2A
 288         select SYS_SUPPORTS_SH_CMT
 289         select SYS_SUPPORTS_SH_MTU2
 290
 291 config CPU_SUBTYPE_SH7263
 292         bool "Support SH7263 processor"
 293         select CPU_SH2A
 294         select CPU_HAS_FPU
 295         select SYS_SUPPORTS_SH_CMT
 296         select SYS_SUPPORTS_SH_MTU2
 297
 298 config CPU_SUBTYPE_SH7264
 299         bool "Support SH7264 processor"
 300         select CPU_SH2A
 301         select CPU_HAS_FPU
 302         select SYS_SUPPORTS_SH_CMT
 303         select SYS_SUPPORTS_SH_MTU2
 304         select PINCTRL
 305
 306 config CPU_SUBTYPE_SH7269
 307         bool "Support SH7269 processor"
 308         select CPU_SH2A
 309         select CPU_HAS_FPU
 310         select SYS_SUPPORTS_SH_CMT
 311         select SYS_SUPPORTS_SH_MTU2
 312         select PINCTRL
 313
 314 config CPU_SUBTYPE_MXG
 315         bool "Support MX-G processor"
 316         select CPU_SH2A
 317         select SYS_SUPPORTS_SH_MTU2
 318         help
 319           Select MX-G if running on an R8A03022BG part.
 320
 321 # SH-3 Processor Support
 322
 323 config CPU_SUBTYPE_SH7705
 324         bool "Support SH7705 processor"
 325         select CPU_SH3
 326
 327 config CPU_SUBTYPE_SH7706
 328         bool "Support SH7706 processor"
 329         select CPU_SH3
 330         help
 331           Select SH7706 if you have a 133 Mhz SH-3 HD6417706 CPU.
 332
 333 config CPU_SUBTYPE_SH7707
 334         bool "Support SH7707 processor"
 335         select CPU_SH3
 336         help
 337           Select SH7707 if you have a  60 Mhz SH-3 HD6417707 CPU.
 338
 339 config CPU_SUBTYPE_SH7708
 340         bool "Support SH7708 processor"
 341         select CPU_SH3
 342         help
 343           Select SH7708 if you have a  60 Mhz SH-3 HD6417708S or
 344           if you have a 100 Mhz SH-3 HD6417708R CPU.
 345
 346 config CPU_SUBTYPE_SH7709
 347         bool "Support SH7709 processor"
 348         select CPU_SH3
 349         help
 350           Select SH7709 if you have a  80 Mhz SH-3 HD6417709 CPU.
 351
 352 config CPU_SUBTYPE_SH7710
 353         bool "Support SH7710 processor"
 354         select CPU_SH3
 355         select CPU_HAS_DSP
 356         help
 357           Select SH7710 if you have a SH3-DSP SH7710 CPU.
 358
 359 config CPU_SUBTYPE_SH7712
 360         bool "Support SH7712 processor"
 361         select CPU_SH3
 362         select CPU_HAS_DSP
 363         help
 364           Select SH7712 if you have a SH3-DSP SH7712 CPU.
 365
 366 config CPU_SUBTYPE_SH7720
 367         bool "Support SH7720 processor"
 368         select CPU_SH3
 369         select CPU_HAS_DSP
 370         select SYS_SUPPORTS_SH_CMT
 371         select USB_OHCI_SH if USB_OHCI_HCD
 372         select PINCTRL
 373         help
 374           Select SH7720 if you have a SH3-DSP SH7720 CPU.
 375
 376 config CPU_SUBTYPE_SH7721
 377         bool "Support SH7721 processor"
 378         select CPU_SH3
 379         select CPU_HAS_DSP
 380         select SYS_SUPPORTS_SH_CMT
 381         select USB_OHCI_SH if USB_OHCI_HCD
 382         help
 383           Select SH7721 if you have a SH3-DSP SH7721 CPU.
 384
 385 # SH-4 Processor Support
 386
 387 config CPU_SUBTYPE_SH7750
 388         bool "Support SH7750 processor"
 389         select CPU_SH4
 390         help
 391           Select SH7750 if you have a 200 Mhz SH-4 HD6417750 CPU.
 392
 393 config CPU_SUBTYPE_SH7091
 394         bool "Support SH7091 processor"
 395         select CPU_SH4
 396         help
 397           Select SH7091 if you have an SH-4 based Sega device (such as
 398           the Dreamcast, Naomi, and Naomi 2).
 399
 400 config CPU_SUBTYPE_SH7750R
 401         bool "Support SH7750R processor"
 402         select CPU_SH4
 403
 404 config CPU_SUBTYPE_SH7750S
 405         bool "Support SH7750S processor"
 406         select CPU_SH4
 407
 408 config CPU_SUBTYPE_SH7751
 409         bool "Support SH7751 processor"
 410         select CPU_SH4
 411         help
 412           Select SH7751 if you have a 166 Mhz SH-4 HD6417751 CPU,
 413           or if you have a HD6417751R CPU.
 414
 415 config CPU_SUBTYPE_SH7751R
 416         bool "Support SH7751R processor"
 417         select CPU_SH4
 418
 419 config CPU_SUBTYPE_SH7760
 420         bool "Support SH7760 processor"
 421         select CPU_SH4
 422
 423 config CPU_SUBTYPE_SH4_202
 424         bool "Support SH4-202 processor"
 425         select CPU_SH4
 426
 427 # SH-4A Processor Support
 428
 429 config CPU_SUBTYPE_SH7723
 430         bool "Support SH7723 processor"
 431         select CPU_SH4A
 432         select CPU_SHX2
 433         select ARCH_SHMOBILE
 434         select ARCH_SPARSEMEM_ENABLE
 435         select SYS_SUPPORTS_SH_CMT
 436         select PINCTRL
 437         help
 438           Select SH7723 if you have an SH-MobileR2 CPU.
 439
 440 config CPU_SUBTYPE_SH7724
 441         bool "Support SH7724 processor"
 442         select CPU_SH4A
 443         select CPU_SHX2
 444         select ARCH_SHMOBILE
 445         select ARCH_SPARSEMEM_ENABLE
 446         select SYS_SUPPORTS_SH_CMT
 447         select PINCTRL
 448         help
 449           Select SH7724 if you have an SH-MobileR2R CPU.
 450
 451 config CPU_SUBTYPE_SH7734
 452         bool "Support SH7734 processor"
 453         select CPU_SH4A
 454         select CPU_SHX2
 455         select PINCTRL
 456         help
 457           Select SH7734 if you have a SH4A SH7734 CPU.
 458
 459 config CPU_SUBTYPE_SH7757
 460         bool "Support SH7757 processor"
 461         select CPU_SH4A
 462         select CPU_SHX2
 463         select PINCTRL
 464         help
 465           Select SH7757 if you have a SH4A SH7757 CPU.
 466
 467 config CPU_SUBTYPE_SH7763
 468         bool "Support SH7763 processor"
 469         select CPU_SH4A
 470         select USB_OHCI_SH if USB_OHCI_HCD
 471         help
 472           Select SH7763 if you have a SH4A SH7763(R5S77631) CPU.
 473
 474 config CPU_SUBTYPE_SH7770
 475         bool "Support SH7770 processor"
 476         select CPU_SH4A
 477
 478 config CPU_SUBTYPE_SH7780
 479         bool "Support SH7780 processor"
 480         select CPU_SH4A
 481
 482 config CPU_SUBTYPE_SH7785
 483         bool "Support SH7785 processor"
 484         select CPU_SH4A
 485         select CPU_SHX2
 486         select ARCH_SPARSEMEM_ENABLE
 487         select SYS_SUPPORTS_NUMA
 488         select PINCTRL
 489
 490 config CPU_SUBTYPE_SH7786
 491         bool "Support SH7786 processor"
 492         select CPU_SH4A
 493         select CPU_SHX3
 494         select CPU_HAS_PTEAEX
 495         select GENERIC_CLOCKEVENTS_BROADCAST if SMP
 496         select USB_OHCI_SH if USB_OHCI_HCD
 497         select USB_EHCI_SH if USB_EHCI_HCD
 498         select PINCTRL
 499
 500 config CPU_SUBTYPE_SHX3
 501         bool "Support SH-X3 processor"
 502         select CPU_SH4A
 503         select CPU_SHX3
 504         select GENERIC_CLOCKEVENTS_BROADCAST if SMP
 505         select GPIOLIB
 506         select PINCTRL
 507
 508 # SH4AL-DSP Processor Support
 509
 510 config CPU_SUBTYPE_SH7343
 511         bool "Support SH7343 processor"
 512         select CPU_SH4AL_DSP
 513         select ARCH_SHMOBILE
 514         select SYS_SUPPORTS_SH_CMT
 515
 516 config CPU_SUBTYPE_SH7722
 517         bool "Support SH7722 processor"
 518         select CPU_SH4AL_DSP
 519         select CPU_SHX2
 520         select ARCH_SHMOBILE
 521         select ARCH_SPARSEMEM_ENABLE
 522         select SYS_SUPPORTS_NUMA
 523         select SYS_SUPPORTS_SH_CMT
 524         select PINCTRL
 525
 526 config CPU_SUBTYPE_SH7366
 527         bool "Support SH7366 processor"
 528         select CPU_SH4AL_DSP
 529         select CPU_SHX2
 530         select ARCH_SHMOBILE
 531         select ARCH_SPARSEMEM_ENABLE
 532         select SYS_SUPPORTS_NUMA
 533         select SYS_SUPPORTS_SH_CMT
 534
 535 endchoice
 536
 537 endif
 538
 539 if SUPERH64
 540
 541 choice
 542         prompt "Processor sub-type selection"
 543
 544 # SH-5 Processor Support
 545
 546 config CPU_SUBTYPE_SH5_101
 547         bool "Support SH5-101 processor"
 548         select CPU_SH5
 549
 550 config CPU_SUBTYPE_SH5_103
 551         bool "Support SH5-103 processor"
 552         select CPU_SH5
 553
 554 endchoice
 555
 556 endif
 557
 558 source "arch/sh/mm/Kconfig"
 559
 560 source "arch/sh/Kconfig.cpu"
 561
 562 source "arch/sh/boards/Kconfig"
 563
 564 menu "Timer and clock configuration"
 565
 566 config SH_PCLK_FREQ
 567         int "Peripheral clock frequency (in Hz)"
 568         depends on SH_CLK_CPG_LEGACY
 569         default "31250000" if CPU_SUBTYPE_SH7619
 570         default "33333333" if CPU_SUBTYPE_SH7770 || \
 571                               CPU_SUBTYPE_SH7760 || \
 572                               CPU_SUBTYPE_SH7705 || \
 573                               CPU_SUBTYPE_SH7203 || \
 574                               CPU_SUBTYPE_SH7206 || \
 575                               CPU_SUBTYPE_SH7263 || \
 576                               CPU_SUBTYPE_MXG
 577         default "60000000" if CPU_SUBTYPE_SH7751 || CPU_SUBTYPE_SH7751R
 578         default "66000000" if CPU_SUBTYPE_SH4_202
 579         default "50000000"
 580         help
 581           This option is used to specify the peripheral clock frequency.
 582           This is necessary for determining the reference clock value on
 583           platforms lacking an RTC.
 584
 585 config SH_CLK_CPG
 586         def_bool y
 587
 588 config SH_CLK_CPG_LEGACY
 589         depends on SH_CLK_CPG
 590         def_bool y if !CPU_SUBTYPE_SH7785 && !ARCH_SHMOBILE && \
 591                       !CPU_SHX3 && !CPU_SUBTYPE_SH7757 && \
 592                       !CPU_SUBTYPE_SH7734 && !CPU_SUBTYPE_SH7264 && \
 593                       !CPU_SUBTYPE_SH7269
 594
 595 endmenu
 596
 597 menu "CPU Frequency scaling"
 598 source "drivers/cpufreq/Kconfig"
 599 endmenu
 600
 601 source "arch/sh/drivers/Kconfig"
 602
 603 endmenu
 604
 605 menu "Kernel features"
 606
 607 source kernel/Kconfig.hz
 608
 609 config KEXEC
 610         bool "kexec system call (EXPERIMENTAL)"
 611         depends on SUPERH32 && MMU
 612         select KEXEC_CORE
 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.  As of this writing the exact hardware
 624           interface is strongly in flux, so no good recommendation can be
 625           made.
 626
 627 config CRASH_DUMP
 628         bool "kernel crash dumps (EXPERIMENTAL)"
 629         depends on SUPERH32 && 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           PHYSICAL_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
 644         help
 645           Jump between original kernel and kexeced kernel and invoke
 646           code via KEXEC
 647
 648 config PHYSICAL_START
 649         hex "Physical address where the kernel is loaded" if (EXPERT || CRASH_DUMP)
 650         default MEMORY_START
 651         ---help---
 652           This gives the physical address where the kernel is loaded
 653           and is ordinarily the same as MEMORY_START.
 654
 655           Different values are primarily used in the case of kexec on panic
 656           where the fail safe kernel needs to run at a different address
 657           than the panic-ed kernel.
 658
 659 config SECCOMP
 660         bool "Enable seccomp to safely compute untrusted bytecode"
 661         depends on PROC_FS
 662         help
 663           This kernel feature is useful for number crunching applications
 664           that may need to compute untrusted bytecode during their
 665           execution. By using pipes or other transports made available to
 666           the process as file descriptors supporting the read/write
 667           syscalls, it's possible to isolate those applications in
 668           their own address space using seccomp. Once seccomp is
 669           enabled via prctl, it cannot be disabled and the task is only
 670           allowed to execute a few safe syscalls defined by each seccomp
 671           mode.
 672
 673           If unsure, say N.
 674
 675 config SMP
 676         bool "Symmetric multi-processing support"
 677         depends on SYS_SUPPORTS_SMP
 678         ---help---
 679           This enables support for systems with more than one CPU. If you have
 680           a system with only one CPU, say N. If you have a system with more
 681           than one CPU, say Y.
 682
 683           If you say N here, the kernel will run on uni- and multiprocessor
 684           machines, but will use only one CPU of a multiprocessor machine. If
 685           you say Y here, the kernel will run on many, but not all,
 686           uniprocessor machines. On a uniprocessor machine, the kernel
 687           will run faster if you say N here.
 688
 689           People using multiprocessor machines who say Y here should also say
 690           Y to "Enhanced Real Time Clock Support", below.
 691
 692           See also <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO
 693           available at <http://www.tldp.org/docs.html#howto>.
 694
 695           If you don't know what to do here, say N.
 696
 697 config NR_CPUS
 698         int "Maximum number of CPUs (2-32)"
 699         range 2 32
 700         depends on SMP
 701         default "4" if CPU_SUBTYPE_SHX3
 702         default "2"
 703         help
 704           This allows you to specify the maximum number of CPUs which this
 705           kernel will support.  The maximum supported value is 32 and the
 706           minimum value which makes sense is 2.
 707
 708           This is purely to save memory - each supported CPU adds
 709           approximately eight kilobytes to the kernel image.
 710
 711 config HOTPLUG_CPU
 712         bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
 713         depends on SMP
 714         help
 715           Say Y here to experiment with turning CPUs off and on.  CPUs
 716           can be controlled through /sys/devices/system/cpu.
 717
 718 source "kernel/Kconfig.preempt"
 719
 720 config GUSA
 721         def_bool y
 722         depends on !SMP && SUPERH32
 723         help
 724           This enables support for gUSA (general UserSpace Atomicity).
 725           This is the default implementation for both UP and non-ll/sc
 726           CPUs, and is used by the libc, amongst others.
 727
 728           For additional information, design information can be found
 729           in <http://lc.linux.or.jp/lc2002/papers/niibe0919p.pdf>.
 730
 731           This should only be disabled for special cases where alternate
 732           atomicity implementations exist.
 733
 734 config GUSA_RB
 735         bool "Implement atomic operations by roll-back (gRB) (EXPERIMENTAL)"
 736         depends on GUSA && CPU_SH3 || (CPU_SH4 && !CPU_SH4A)
 737         help
 738           Enabling this option will allow the kernel to implement some
 739           atomic operations using a software implementation of load-locked/
 740           store-conditional (LLSC). On machines which do not have hardware
 741           LLSC, this should be more efficient than the other alternative of
 742           disabling interrupts around the atomic sequence.
 743
 744 config HW_PERF_EVENTS
 745         bool "Enable hardware performance counter support for perf events"
 746         depends on PERF_EVENTS && CPU_HAS_PMU
 747         default y
 748         help
 749           Enable hardware performance counter support for perf events. If
 750           disabled, perf events will use software events only.
 751
 752 source "drivers/sh/Kconfig"
 753
 754 endmenu
 755
 756 menu "Boot options"
 757
 758 config USE_BUILTIN_DTB
 759         bool "Use builtin DTB"
 760         default n
 761         depends on SH_DEVICE_TREE
 762         help
 763           Link a device tree blob for particular hardware into the kernel,
 764           suppressing use of the DTB pointer provided by the bootloader.
 765           This option should only be used with legacy bootloaders that are
 766           not capable of providing a DTB to the kernel, or for experimental
 767           hardware without stable device tree bindings.
 768
 769 config BUILTIN_DTB_SOURCE
 770         string "Source file for builtin DTB"
 771         default ""
 772         depends on USE_BUILTIN_DTB
 773         help
 774           Base name (without suffix, relative to arch/sh/boot/dts) for the
 775           a DTS file that will be used to produce the DTB linked into the
 776           kernel.
 777
 778 config ZERO_PAGE_OFFSET
 779         hex
 780         default "0x00010000" if PAGE_SIZE_64KB || SH_RTS7751R2D || \
 781                                 SH_7751_SOLUTION_ENGINE
 782         default "0x00004000" if PAGE_SIZE_16KB || SH_SH03
 783         default "0x00002000" if PAGE_SIZE_8KB
 784         default "0x00001000"
 785         help
 786           This sets the default offset of zero page.
 787
 788 config BOOT_LINK_OFFSET
 789         hex
 790         default "0x00210000" if SH_SHMIN
 791         default "0x00400000" if SH_CAYMAN
 792         default "0x00810000" if SH_7780_SOLUTION_ENGINE
 793         default "0x009e0000" if SH_TITAN
 794         default "0x01800000" if SH_SDK7780
 795         default "0x02000000" if SH_EDOSK7760
 796         default "0x00800000"
 797         help
 798           This option allows you to set the link address offset of the zImage.
 799           This can be useful if you are on a board which has a small amount of
 800           memory.
 801
 802 config ENTRY_OFFSET
 803         hex
 804         default "0x00001000" if PAGE_SIZE_4KB
 805         default "0x00002000" if PAGE_SIZE_8KB
 806         default "0x00004000" if PAGE_SIZE_16KB
 807         default "0x00010000" if PAGE_SIZE_64KB
 808         default "0x00000000"
 809
 810 config ROMIMAGE_MMCIF
 811         bool "Include MMCIF loader in romImage (EXPERIMENTAL)"
 812         depends on CPU_SUBTYPE_SH7724
 813         help
 814           Say Y here to include experimental MMCIF loading code in
 815           romImage. With this enabled it is possible to write the romImage
 816           kernel image to an MMC card and boot the kernel straight from
 817           the reset vector. At reset the processor Mask ROM will load the
 818           first part of the romImage which in turn loads the rest the kernel
 819           image to RAM using the MMCIF hardware block.
 820
 821 choice
 822         prompt "Kernel command line"
 823         optional
 824         default CMDLINE_OVERWRITE
 825         help
 826           Setting this option allows the kernel command line arguments
 827           to be set.
 828
 829 config CMDLINE_OVERWRITE
 830         bool "Overwrite bootloader kernel arguments"
 831         help
 832           Given string will overwrite any arguments passed in by
 833           a bootloader.
 834
 835 config CMDLINE_EXTEND
 836         bool "Extend bootloader kernel arguments"
 837         help
 838           Given string will be concatenated with arguments passed in
 839           by a bootloader.
 840
 841 endchoice
 842
 843 config CMDLINE
 844         string "Kernel command line arguments string"
 845         depends on CMDLINE_OVERWRITE || CMDLINE_EXTEND
 846         default "console=ttySC1,115200"
 847
 848 endmenu
 849
 850 menu "Bus options"
 851
 852 config SUPERHYWAY
 853         tristate "SuperHyway Bus support"
 854         depends on CPU_SUBTYPE_SH4_202
 855
 856 config MAPLE
 857         bool "Maple Bus support"
 858         depends on SH_DREAMCAST
 859         help
 860          The Maple Bus is SEGA's serial communication bus for peripherals
 861          on the Dreamcast. Without this bus support you won't be able to
 862          get your Dreamcast keyboard etc to work, so most users
 863          probably want to say 'Y' here, unless you are only using the
 864          Dreamcast with a serial line terminal or a remote network
 865          connection.
 866
 867 config PCI
 868         bool "PCI support"
 869         depends on SYS_SUPPORTS_PCI
 870         select PCI_DOMAINS
 871         select GENERIC_PCI_IOMAP
 872         select NO_GENERIC_PCI_IOPORT_MAP
 873         help
 874           Find out whether you have a PCI motherboard. PCI is the name of a
 875           bus system, i.e. the way the CPU talks to the other stuff inside
 876           your box. If you have PCI, say Y, otherwise N.
 877
 878 config PCI_DOMAINS
 879         bool
 880
 881 source "drivers/pci/Kconfig"
 882
 883 source "drivers/pcmcia/Kconfig"
 884
 885 endmenu
 886
 887 menu "Executable file formats"
 888
 889 source "fs/Kconfig.binfmt"
 890
 891 endmenu
 892
 893 menu "Power management options (EXPERIMENTAL)"
 894
 895 source "kernel/power/Kconfig"
 896
 897 source "drivers/cpuidle/Kconfig"
 898
 899 endmenu
 900
 901 source "net/Kconfig"
 902
 903 source "drivers/Kconfig"
 904
 905 source "fs/Kconfig"
 906
 907 source "arch/sh/Kconfig.debug"
 908
 909 source "security/Kconfig"
 910
 911 source "crypto/Kconfig"
 912
 913 source "lib/Kconfig"