arch/sh/Kconfig

   1 # SPDX-License-Identifier: GPL-2.0
   2 config SUPERH
   3         def_bool y
   4         select ARCH_32BIT_OFF_T
   5         select ARCH_HAVE_CUSTOM_GPIO_H
   6         select ARCH_HAVE_NMI_SAFE_CMPXCHG if (GUSA_RB || CPU_SH4A)
   7         select ARCH_HAS_BINFMT_FLAT if !MMU
   8         select ARCH_HAS_GIGANTIC_PAGE
   9         select ARCH_HAS_GCOV_PROFILE_ALL
  10         select ARCH_HAS_PTE_SPECIAL
  11         select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
  12         select ARCH_HIBERNATION_POSSIBLE if MMU
  13         select ARCH_MIGHT_HAVE_PC_PARPORT
  14         select ARCH_WANT_IPC_PARSE_VERSION
  15         select CLKDEV_LOOKUP
  16         select CPU_NO_EFFICIENT_FFS
  17         select DMA_DECLARE_COHERENT
  18         select GENERIC_ATOMIC64
  19         select GENERIC_CLOCKEVENTS
  20         select GENERIC_CMOS_UPDATE if SH_SH03 || SH_DREAMCAST
  21         select GENERIC_IDLE_POLL_SETUP
  22         select GENERIC_IRQ_SHOW
  23         select GENERIC_PCI_IOMAP if PCI
  24         select GENERIC_SCHED_CLOCK
  25         select GENERIC_STRNCPY_FROM_USER
  26         select GENERIC_STRNLEN_USER
  27         select GENERIC_SMP_IDLE_THREAD
  28         select GUP_GET_PTE_LOW_HIGH if X2TLB
  29         select HAVE_ARCH_AUDITSYSCALL
  30         select HAVE_ARCH_KGDB
  31         select HAVE_ARCH_SECCOMP_FILTER
  32         select HAVE_ARCH_TRACEHOOK
  33         select HAVE_COPY_THREAD_TLS
  34         select HAVE_DEBUG_BUGVERBOSE
  35         select HAVE_DEBUG_KMEMLEAK
  36         select HAVE_DYNAMIC_FTRACE
  37         select HAVE_FAST_GUP if MMU
  38         select HAVE_FUNCTION_GRAPH_TRACER
  39         select HAVE_FUNCTION_TRACER
  40         select HAVE_FUTEX_CMPXCHG if FUTEX
  41         select HAVE_FTRACE_MCOUNT_RECORD
  42         select HAVE_HW_BREAKPOINT
  43         select HAVE_IDE if HAS_IOPORT_MAP
  44         select HAVE_IOREMAP_PROT if MMU && !X2TLB
  45         select HAVE_KERNEL_BZIP2
  46         select HAVE_KERNEL_GZIP
  47         select HAVE_KERNEL_LZMA
  48         select HAVE_KERNEL_LZO
  49         select HAVE_KERNEL_XZ
  50         select HAVE_KPROBES
  51         select HAVE_KRETPROBES
  52         select HAVE_MIXED_BREAKPOINTS_REGS
  53         select HAVE_MOD_ARCH_SPECIFIC if DWARF_UNWINDER
  54         select HAVE_NMI
  55         select HAVE_OPROFILE
  56         select HAVE_PATA_PLATFORM
  57         select HAVE_PERF_EVENTS
  58         select HAVE_REGS_AND_STACK_ACCESS_API
  59         select HAVE_UID16
  60         select HAVE_STACKPROTECTOR
  61         select HAVE_SYSCALL_TRACEPOINTS
  62         select IRQ_FORCED_THREADING
  63         select MAY_HAVE_SPARSE_IRQ
  64         select MODULES_USE_ELF_RELA
  65         select NEED_SG_DMA_LENGTH
  66         select NO_DMA if !MMU && !DMA_COHERENT
  67         select NO_GENERIC_PCI_IOPORT_MAP if PCI
  68         select OLD_SIGACTION
  69         select OLD_SIGSUSPEND
  70         select PCI_DOMAINS if PCI
  71         select PERF_EVENTS
  72         select PERF_USE_VMALLOC
  73         select RTC_LIB
  74         select SPARSE_IRQ
  75         help
  76           The SuperH is a RISC processor targeted for use in embedded systems
  77           and consumer electronics; it was also used in the Sega Dreamcast
  78           gaming console.  The SuperH port has a home page at
  79           <http://www.linux-sh.org/>.
  80
  81 config GENERIC_BUG
  82         def_bool y
  83         depends on BUG
  84
  85 config GENERIC_HWEIGHT
  86         def_bool y
  87
  88 config GENERIC_CALIBRATE_DELAY
  89         bool
  90
  91 config GENERIC_LOCKBREAK
  92         def_bool y
  93         depends on SMP && PREEMPTION
  94
  95 config ARCH_SUSPEND_POSSIBLE
  96         def_bool n
  97
  98 config ARCH_HIBERNATION_POSSIBLE
  99         def_bool n
 100
 101 config SYS_SUPPORTS_APM_EMULATION
 102         bool
 103         select ARCH_SUSPEND_POSSIBLE
 104
 105 config SYS_SUPPORTS_HUGETLBFS
 106         bool
 107
 108 config SYS_SUPPORTS_SMP
 109         bool
 110
 111 config SYS_SUPPORTS_NUMA
 112         bool
 113
 114 config STACKTRACE_SUPPORT
 115         def_bool y
 116
 117 config LOCKDEP_SUPPORT
 118         def_bool y
 119
 120 config ARCH_HAS_ILOG2_U32
 121         def_bool n
 122
 123 config ARCH_HAS_ILOG2_U64
 124         def_bool n
 125
 126 config NO_IOPORT_MAP
 127         def_bool !PCI
 128         depends on !SH_SH4202_MICRODEV && !SH_SHMIN && !SH_HP6XX && \
 129                    !SH_SOLUTION_ENGINE
 130
 131 config IO_TRAPPED
 132         bool
 133
 134 config SWAP_IO_SPACE
 135         bool
 136
 137 config DMA_COHERENT
 138         bool
 139
 140 config DMA_NONCOHERENT
 141         def_bool !NO_DMA && !DMA_COHERENT
 142         select ARCH_HAS_DMA_PREP_COHERENT
 143         select ARCH_HAS_SYNC_DMA_FOR_DEVICE
 144         select DMA_DIRECT_REMAP
 145
 146 config PGTABLE_LEVELS
 147         default 3 if X2TLB
 148         default 2
 149
 150 menu "System type"
 151
 152 #
 153 # Processor families
 154 #
 155 config CPU_SH2
 156         bool
 157         select SH_INTC
 158
 159 config CPU_SH2A
 160         bool
 161         select CPU_SH2
 162         select UNCACHED_MAPPING
 163
 164 config CPU_J2
 165         bool
 166         select CPU_SH2
 167         select OF
 168         select OF_EARLY_FLATTREE
 169
 170 config CPU_SH3
 171         bool
 172         select CPU_HAS_INTEVT
 173         select CPU_HAS_SR_RB
 174         select SH_INTC
 175         select SYS_SUPPORTS_SH_TMU
 176
 177 config CPU_SH4
 178         bool
 179         select CPU_HAS_INTEVT
 180         select CPU_HAS_SR_RB
 181         select CPU_HAS_FPU if !CPU_SH4AL_DSP
 182         select SH_INTC
 183         select SYS_SUPPORTS_SH_TMU
 184         select SYS_SUPPORTS_HUGETLBFS if MMU
 185
 186 config CPU_SH4A
 187         bool
 188         select CPU_SH4
 189
 190 config CPU_SH4AL_DSP
 191         bool
 192         select CPU_SH4A
 193         select CPU_HAS_DSP
 194
 195 config CPU_SHX2
 196         bool
 197
 198 config CPU_SHX3
 199         bool
 200         select DMA_COHERENT
 201         select SYS_SUPPORTS_SMP
 202         select SYS_SUPPORTS_NUMA
 203
 204 config ARCH_SHMOBILE
 205         bool
 206         select ARCH_SUSPEND_POSSIBLE
 207         select PM
 208
 209 config CPU_HAS_PMU
 210        depends on CPU_SH4 || CPU_SH4A
 211        default y
 212        bool
 213
 214 choice
 215         prompt "Processor sub-type selection"
 216
 217 #
 218 # Processor subtypes
 219 #
 220
 221 # SH-2 Processor Support
 222
 223 config CPU_SUBTYPE_SH7619
 224         bool "Support SH7619 processor"
 225         select CPU_SH2
 226         select SYS_SUPPORTS_SH_CMT
 227
 228 config CPU_SUBTYPE_J2
 229         bool "Support J2 processor"
 230         select CPU_J2
 231         select SYS_SUPPORTS_SMP
 232         select GENERIC_CLOCKEVENTS_BROADCAST if SMP
 233
 234 # SH-2A Processor Support
 235
 236 config CPU_SUBTYPE_SH7201
 237         bool "Support SH7201 processor"
 238         select CPU_SH2A
 239         select CPU_HAS_FPU
 240         select SYS_SUPPORTS_SH_MTU2
 241
 242 config CPU_SUBTYPE_SH7203
 243         bool "Support SH7203 processor"
 244         select CPU_SH2A
 245         select CPU_HAS_FPU
 246         select SYS_SUPPORTS_SH_CMT
 247         select SYS_SUPPORTS_SH_MTU2
 248         select PINCTRL
 249
 250 config CPU_SUBTYPE_SH7206
 251         bool "Support SH7206 processor"
 252         select CPU_SH2A
 253         select SYS_SUPPORTS_SH_CMT
 254         select SYS_SUPPORTS_SH_MTU2
 255
 256 config CPU_SUBTYPE_SH7263
 257         bool "Support SH7263 processor"
 258         select CPU_SH2A
 259         select CPU_HAS_FPU
 260         select SYS_SUPPORTS_SH_CMT
 261         select SYS_SUPPORTS_SH_MTU2
 262
 263 config CPU_SUBTYPE_SH7264
 264         bool "Support SH7264 processor"
 265         select CPU_SH2A
 266         select CPU_HAS_FPU
 267         select SYS_SUPPORTS_SH_CMT
 268         select SYS_SUPPORTS_SH_MTU2
 269         select PINCTRL
 270
 271 config CPU_SUBTYPE_SH7269
 272         bool "Support SH7269 processor"
 273         select CPU_SH2A
 274         select CPU_HAS_FPU
 275         select SYS_SUPPORTS_SH_CMT
 276         select SYS_SUPPORTS_SH_MTU2
 277         select PINCTRL
 278
 279 config CPU_SUBTYPE_MXG
 280         bool "Support MX-G processor"
 281         select CPU_SH2A
 282         select SYS_SUPPORTS_SH_MTU2
 283         help
 284           Select MX-G if running on an R8A03022BG part.
 285
 286 # SH-3 Processor Support
 287
 288 config CPU_SUBTYPE_SH7705
 289         bool "Support SH7705 processor"
 290         select CPU_SH3
 291
 292 config CPU_SUBTYPE_SH7706
 293         bool "Support SH7706 processor"
 294         select CPU_SH3
 295         help
 296           Select SH7706 if you have a 133 Mhz SH-3 HD6417706 CPU.
 297
 298 config CPU_SUBTYPE_SH7707
 299         bool "Support SH7707 processor"
 300         select CPU_SH3
 301         help
 302           Select SH7707 if you have a  60 Mhz SH-3 HD6417707 CPU.
 303
 304 config CPU_SUBTYPE_SH7708
 305         bool "Support SH7708 processor"
 306         select CPU_SH3
 307         help
 308           Select SH7708 if you have a  60 Mhz SH-3 HD6417708S or
 309           if you have a 100 Mhz SH-3 HD6417708R CPU.
 310
 311 config CPU_SUBTYPE_SH7709
 312         bool "Support SH7709 processor"
 313         select CPU_SH3
 314         help
 315           Select SH7709 if you have a  80 Mhz SH-3 HD6417709 CPU.
 316
 317 config CPU_SUBTYPE_SH7710
 318         bool "Support SH7710 processor"
 319         select CPU_SH3
 320         select CPU_HAS_DSP
 321         help
 322           Select SH7710 if you have a SH3-DSP SH7710 CPU.
 323
 324 config CPU_SUBTYPE_SH7712
 325         bool "Support SH7712 processor"
 326         select CPU_SH3
 327         select CPU_HAS_DSP
 328         help
 329           Select SH7712 if you have a SH3-DSP SH7712 CPU.
 330
 331 config CPU_SUBTYPE_SH7720
 332         bool "Support SH7720 processor"
 333         select CPU_SH3
 334         select CPU_HAS_DSP
 335         select SYS_SUPPORTS_SH_CMT
 336         select USB_OHCI_SH if USB_OHCI_HCD
 337         select PINCTRL
 338         help
 339           Select SH7720 if you have a SH3-DSP SH7720 CPU.
 340
 341 config CPU_SUBTYPE_SH7721
 342         bool "Support SH7721 processor"
 343         select CPU_SH3
 344         select CPU_HAS_DSP
 345         select SYS_SUPPORTS_SH_CMT
 346         select USB_OHCI_SH if USB_OHCI_HCD
 347         help
 348           Select SH7721 if you have a SH3-DSP SH7721 CPU.
 349
 350 # SH-4 Processor Support
 351
 352 config CPU_SUBTYPE_SH7750
 353         bool "Support SH7750 processor"
 354         select CPU_SH4
 355         help
 356           Select SH7750 if you have a 200 Mhz SH-4 HD6417750 CPU.
 357
 358 config CPU_SUBTYPE_SH7091
 359         bool "Support SH7091 processor"
 360         select CPU_SH4
 361         help
 362           Select SH7091 if you have an SH-4 based Sega device (such as
 363           the Dreamcast, Naomi, and Naomi 2).
 364
 365 config CPU_SUBTYPE_SH7750R
 366         bool "Support SH7750R processor"
 367         select CPU_SH4
 368
 369 config CPU_SUBTYPE_SH7750S
 370         bool "Support SH7750S processor"
 371         select CPU_SH4
 372
 373 config CPU_SUBTYPE_SH7751
 374         bool "Support SH7751 processor"
 375         select CPU_SH4
 376         help
 377           Select SH7751 if you have a 166 Mhz SH-4 HD6417751 CPU,
 378           or if you have a HD6417751R CPU.
 379
 380 config CPU_SUBTYPE_SH7751R
 381         bool "Support SH7751R processor"
 382         select CPU_SH4
 383
 384 config CPU_SUBTYPE_SH7760
 385         bool "Support SH7760 processor"
 386         select CPU_SH4
 387
 388 config CPU_SUBTYPE_SH4_202
 389         bool "Support SH4-202 processor"
 390         select CPU_SH4
 391
 392 # SH-4A Processor Support
 393
 394 config CPU_SUBTYPE_SH7723
 395         bool "Support SH7723 processor"
 396         select CPU_SH4A
 397         select CPU_SHX2
 398         select ARCH_SHMOBILE
 399         select ARCH_SPARSEMEM_ENABLE
 400         select SYS_SUPPORTS_SH_CMT
 401         select PINCTRL
 402         help
 403           Select SH7723 if you have an SH-MobileR2 CPU.
 404
 405 config CPU_SUBTYPE_SH7724
 406         bool "Support SH7724 processor"
 407         select CPU_SH4A
 408         select CPU_SHX2
 409         select ARCH_SHMOBILE
 410         select ARCH_SPARSEMEM_ENABLE
 411         select SYS_SUPPORTS_SH_CMT
 412         select PINCTRL
 413         help
 414           Select SH7724 if you have an SH-MobileR2R CPU.
 415
 416 config CPU_SUBTYPE_SH7734
 417         bool "Support SH7734 processor"
 418         select CPU_SH4A
 419         select CPU_SHX2
 420         select PINCTRL
 421         help
 422           Select SH7734 if you have a SH4A SH7734 CPU.
 423
 424 config CPU_SUBTYPE_SH7757
 425         bool "Support SH7757 processor"
 426         select CPU_SH4A
 427         select CPU_SHX2
 428         select PINCTRL
 429         help
 430           Select SH7757 if you have a SH4A SH7757 CPU.
 431
 432 config CPU_SUBTYPE_SH7763
 433         bool "Support SH7763 processor"
 434         select CPU_SH4A
 435         select USB_OHCI_SH if USB_OHCI_HCD
 436         help
 437           Select SH7763 if you have a SH4A SH7763(R5S77631) CPU.
 438
 439 config CPU_SUBTYPE_SH7770
 440         bool "Support SH7770 processor"
 441         select CPU_SH4A
 442
 443 config CPU_SUBTYPE_SH7780
 444         bool "Support SH7780 processor"
 445         select CPU_SH4A
 446
 447 config CPU_SUBTYPE_SH7785
 448         bool "Support SH7785 processor"
 449         select CPU_SH4A
 450         select CPU_SHX2
 451         select ARCH_SPARSEMEM_ENABLE
 452         select SYS_SUPPORTS_NUMA
 453         select PINCTRL
 454
 455 config CPU_SUBTYPE_SH7786
 456         bool "Support SH7786 processor"
 457         select CPU_SH4A
 458         select CPU_SHX3
 459         select CPU_HAS_PTEAEX
 460         select GENERIC_CLOCKEVENTS_BROADCAST if SMP
 461         select USB_OHCI_SH if USB_OHCI_HCD
 462         select USB_EHCI_SH if USB_EHCI_HCD
 463         select PINCTRL
 464
 465 config CPU_SUBTYPE_SHX3
 466         bool "Support SH-X3 processor"
 467         select CPU_SH4A
 468         select CPU_SHX3
 469         select GENERIC_CLOCKEVENTS_BROADCAST if SMP
 470         select GPIOLIB
 471         select PINCTRL
 472
 473 # SH4AL-DSP Processor Support
 474
 475 config CPU_SUBTYPE_SH7343
 476         bool "Support SH7343 processor"
 477         select CPU_SH4AL_DSP
 478         select ARCH_SHMOBILE
 479         select SYS_SUPPORTS_SH_CMT
 480
 481 config CPU_SUBTYPE_SH7722
 482         bool "Support SH7722 processor"
 483         select CPU_SH4AL_DSP
 484         select CPU_SHX2
 485         select ARCH_SHMOBILE
 486         select ARCH_SPARSEMEM_ENABLE
 487         select SYS_SUPPORTS_NUMA
 488         select SYS_SUPPORTS_SH_CMT
 489         select PINCTRL
 490
 491 config CPU_SUBTYPE_SH7366
 492         bool "Support SH7366 processor"
 493         select CPU_SH4AL_DSP
 494         select CPU_SHX2
 495         select ARCH_SHMOBILE
 496         select ARCH_SPARSEMEM_ENABLE
 497         select SYS_SUPPORTS_NUMA
 498         select SYS_SUPPORTS_SH_CMT
 499
 500 endchoice
 501
 502 source "arch/sh/mm/Kconfig"
 503
 504 source "arch/sh/Kconfig.cpu"
 505
 506 source "arch/sh/boards/Kconfig"
 507
 508 menu "Timer and clock configuration"
 509
 510 config SH_PCLK_FREQ
 511         int "Peripheral clock frequency (in Hz)"
 512         depends on SH_CLK_CPG_LEGACY
 513         default "31250000" if CPU_SUBTYPE_SH7619
 514         default "33333333" if CPU_SUBTYPE_SH7770 || \
 515                               CPU_SUBTYPE_SH7760 || \
 516                               CPU_SUBTYPE_SH7705 || \
 517                               CPU_SUBTYPE_SH7203 || \
 518                               CPU_SUBTYPE_SH7206 || \
 519                               CPU_SUBTYPE_SH7263 || \
 520                               CPU_SUBTYPE_MXG
 521         default "60000000" if CPU_SUBTYPE_SH7751 || CPU_SUBTYPE_SH7751R
 522         default "66000000" if CPU_SUBTYPE_SH4_202
 523         default "50000000"
 524         help
 525           This option is used to specify the peripheral clock frequency.
 526           This is necessary for determining the reference clock value on
 527           platforms lacking an RTC.
 528
 529 config SH_CLK_CPG
 530         def_bool y
 531
 532 config SH_CLK_CPG_LEGACY
 533         depends on SH_CLK_CPG
 534         def_bool y if !CPU_SUBTYPE_SH7785 && !ARCH_SHMOBILE && \
 535                       !CPU_SHX3 && !CPU_SUBTYPE_SH7757 && \
 536                       !CPU_SUBTYPE_SH7734 && !CPU_SUBTYPE_SH7264 && \
 537                       !CPU_SUBTYPE_SH7269
 538
 539 endmenu
 540
 541 menu "CPU Frequency scaling"
 542 source "drivers/cpufreq/Kconfig"
 543 endmenu
 544
 545 source "arch/sh/drivers/Kconfig"
 546
 547 endmenu
 548
 549 menu "Kernel features"
 550
 551 source "kernel/Kconfig.hz"
 552
 553 config KEXEC
 554         bool "kexec system call (EXPERIMENTAL)"
 555         depends on MMU
 556         select KEXEC_CORE
 557         help
 558           kexec is a system call that implements the ability to shutdown your
 559           current kernel, and to start another kernel.  It is like a reboot
 560           but it is independent of the system firmware.  And like a reboot
 561           you can start any kernel with it, not just Linux.
 562
 563           The name comes from the similarity to the exec system call.
 564
 565           It is an ongoing process to be certain the hardware in a machine
 566           is properly shutdown, so do not be surprised if this code does not
 567           initially work for you.  As of this writing the exact hardware
 568           interface is strongly in flux, so no good recommendation can be
 569           made.
 570
 571 config CRASH_DUMP
 572         bool "kernel crash dumps (EXPERIMENTAL)"
 573         depends on BROKEN_ON_SMP
 574         help
 575           Generate crash dump after being started by kexec.
 576           This should be normally only set in special crash dump kernels
 577           which are loaded in the main kernel with kexec-tools into
 578           a specially reserved region and then later executed after
 579           a crash by kdump/kexec. The crash dump kernel must be compiled
 580           to a memory address not used by the main kernel using
 581           PHYSICAL_START.
 582
 583           For more details see Documentation/admin-guide/kdump/kdump.rst
 584
 585 config KEXEC_JUMP
 586         bool "kexec jump (EXPERIMENTAL)"
 587         depends on KEXEC && HIBERNATION
 588         help
 589           Jump between original kernel and kexeced kernel and invoke
 590           code via KEXEC
 591
 592 config PHYSICAL_START
 593         hex "Physical address where the kernel is loaded" if (EXPERT || CRASH_DUMP)
 594         default MEMORY_START
 595         help
 596           This gives the physical address where the kernel is loaded
 597           and is ordinarily the same as MEMORY_START.
 598
 599           Different values are primarily used in the case of kexec on panic
 600           where the fail safe kernel needs to run at a different address
 601           than the panic-ed kernel.
 602
 603 config SECCOMP
 604         bool "Enable seccomp to safely compute untrusted bytecode"
 605         depends on PROC_FS
 606         help
 607           This kernel feature is useful for number crunching applications
 608           that may need to compute untrusted bytecode during their
 609           execution. By using pipes or other transports made available to
 610           the process as file descriptors supporting the read/write
 611           syscalls, it's possible to isolate those applications in
 612           their own address space using seccomp. Once seccomp is
 613           enabled via prctl, it cannot be disabled and the task is only
 614           allowed to execute a few safe syscalls defined by each seccomp
 615           mode.
 616
 617           If unsure, say N.
 618
 619 config SMP
 620         bool "Symmetric multi-processing support"
 621         depends on SYS_SUPPORTS_SMP
 622         help
 623           This enables support for systems with more than one CPU. If you have
 624           a system with only one CPU, say N. If you have a system with more
 625           than one CPU, say Y.
 626
 627           If you say N here, the kernel will run on uni- and multiprocessor
 628           machines, but will use only one CPU of a multiprocessor machine. If
 629           you say Y here, the kernel will run on many, but not all,
 630           uniprocessor machines. On a uniprocessor machine, the kernel
 631           will run faster if you say N here.
 632
 633           People using multiprocessor machines who say Y here should also say
 634           Y to "Enhanced Real Time Clock Support", below.
 635
 636           See also <file:Documentation/admin-guide/lockup-watchdogs.rst> and the SMP-HOWTO
 637           available at <https://www.tldp.org/docs.html#howto>.
 638
 639           If you don't know what to do here, say N.
 640
 641 config NR_CPUS
 642         int "Maximum number of CPUs (2-32)"
 643         range 2 32
 644         depends on SMP
 645         default "4" if CPU_SUBTYPE_SHX3
 646         default "2"
 647         help
 648           This allows you to specify the maximum number of CPUs which this
 649           kernel will support.  The maximum supported value is 32 and the
 650           minimum value which makes sense is 2.
 651
 652           This is purely to save memory - each supported CPU adds
 653           approximately eight kilobytes to the kernel image.
 654
 655 config HOTPLUG_CPU
 656         bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
 657         depends on SMP
 658         help
 659           Say Y here to experiment with turning CPUs off and on.  CPUs
 660           can be controlled through /sys/devices/system/cpu.
 661
 662 config GUSA
 663         def_bool y
 664         depends on !SMP
 665         help
 666           This enables support for gUSA (general UserSpace Atomicity).
 667           This is the default implementation for both UP and non-ll/sc
 668           CPUs, and is used by the libc, amongst others.
 669
 670           For additional information, design information can be found
 671           in <http://lc.linux.or.jp/lc2002/papers/niibe0919p.pdf>.
 672
 673           This should only be disabled for special cases where alternate
 674           atomicity implementations exist.
 675
 676 config GUSA_RB
 677         bool "Implement atomic operations by roll-back (gRB) (EXPERIMENTAL)"
 678         depends on GUSA && CPU_SH3 || (CPU_SH4 && !CPU_SH4A)
 679         help
 680           Enabling this option will allow the kernel to implement some
 681           atomic operations using a software implementation of load-locked/
 682           store-conditional (LLSC). On machines which do not have hardware
 683           LLSC, this should be more efficient than the other alternative of
 684           disabling interrupts around the atomic sequence.
 685
 686 config HW_PERF_EVENTS
 687         bool "Enable hardware performance counter support for perf events"
 688         depends on PERF_EVENTS && CPU_HAS_PMU
 689         default y
 690         help
 691           Enable hardware performance counter support for perf events. If
 692           disabled, perf events will use software events only.
 693
 694 source "drivers/sh/Kconfig"
 695
 696 endmenu
 697
 698 menu "Boot options"
 699
 700 config USE_BUILTIN_DTB
 701         bool "Use builtin DTB"
 702         default n
 703         depends on SH_DEVICE_TREE
 704         help
 705           Link a device tree blob for particular hardware into the kernel,
 706           suppressing use of the DTB pointer provided by the bootloader.
 707           This option should only be used with legacy bootloaders that are
 708           not capable of providing a DTB to the kernel, or for experimental
 709           hardware without stable device tree bindings.
 710
 711 config BUILTIN_DTB_SOURCE
 712         string "Source file for builtin DTB"
 713         default ""
 714         depends on USE_BUILTIN_DTB
 715         help
 716           Base name (without suffix, relative to arch/sh/boot/dts) for the
 717           a DTS file that will be used to produce the DTB linked into the
 718           kernel.
 719
 720 config ZERO_PAGE_OFFSET
 721         hex
 722         default "0x00010000" if PAGE_SIZE_64KB || SH_RTS7751R2D || \
 723                                 SH_7751_SOLUTION_ENGINE
 724         default "0x00004000" if PAGE_SIZE_16KB || SH_SH03
 725         default "0x00002000" if PAGE_SIZE_8KB
 726         default "0x00001000"
 727         help
 728           This sets the default offset of zero page.
 729
 730 config BOOT_LINK_OFFSET
 731         hex
 732         default "0x00210000" if SH_SHMIN
 733         default "0x00810000" if SH_7780_SOLUTION_ENGINE
 734         default "0x009e0000" if SH_TITAN
 735         default "0x01800000" if SH_SDK7780
 736         default "0x02000000" if SH_EDOSK7760
 737         default "0x00800000"
 738         help
 739           This option allows you to set the link address offset of the zImage.
 740           This can be useful if you are on a board which has a small amount of
 741           memory.
 742
 743 config ENTRY_OFFSET
 744         hex
 745         default "0x00001000" if PAGE_SIZE_4KB
 746         default "0x00002000" if PAGE_SIZE_8KB
 747         default "0x00004000" if PAGE_SIZE_16KB
 748         default "0x00010000" if PAGE_SIZE_64KB
 749         default "0x00000000"
 750
 751 config ROMIMAGE_MMCIF
 752         bool "Include MMCIF loader in romImage (EXPERIMENTAL)"
 753         depends on CPU_SUBTYPE_SH7724
 754         help
 755           Say Y here to include experimental MMCIF loading code in
 756           romImage. With this enabled it is possible to write the romImage
 757           kernel image to an MMC card and boot the kernel straight from
 758           the reset vector. At reset the processor Mask ROM will load the
 759           first part of the romImage which in turn loads the rest the kernel
 760           image to RAM using the MMCIF hardware block.
 761
 762 choice
 763         prompt "Kernel command line"
 764         optional
 765         default CMDLINE_OVERWRITE
 766         help
 767           Setting this option allows the kernel command line arguments
 768           to be set.
 769
 770 config CMDLINE_OVERWRITE
 771         bool "Overwrite bootloader kernel arguments"
 772         help
 773           Given string will overwrite any arguments passed in by
 774           a bootloader.
 775
 776 config CMDLINE_EXTEND
 777         bool "Extend bootloader kernel arguments"
 778         help
 779           Given string will be concatenated with arguments passed in
 780           by a bootloader.
 781
 782 endchoice
 783
 784 config CMDLINE
 785         string "Kernel command line arguments string"
 786         depends on CMDLINE_OVERWRITE || CMDLINE_EXTEND
 787         default "console=ttySC1,115200"
 788
 789 endmenu
 790
 791 menu "Bus options"
 792
 793 config SUPERHYWAY
 794         tristate "SuperHyway Bus support"
 795         depends on CPU_SUBTYPE_SH4_202
 796
 797 config MAPLE
 798         bool "Maple Bus support"
 799         depends on SH_DREAMCAST
 800         help
 801          The Maple Bus is SEGA's serial communication bus for peripherals
 802          on the Dreamcast. Without this bus support you won't be able to
 803          get your Dreamcast keyboard etc to work, so most users
 804          probably want to say 'Y' here, unless you are only using the
 805          Dreamcast with a serial line terminal or a remote network
 806          connection.
 807
 808 endmenu
 809
 810 menu "Power management options (EXPERIMENTAL)"
 811
 812 source "kernel/power/Kconfig"
 813
 814 source "drivers/cpuidle/Kconfig"
 815
 816 endmenu