1config SUPERH 2 def_bool y 3 select EXPERT 4 select CLKDEV_LOOKUP 5 select HAVE_IDE if HAS_IOPORT 6 select HAVE_MEMBLOCK 7 select HAVE_MEMBLOCK_NODE_MAP 8 select ARCH_DISCARD_MEMBLOCK 9 select HAVE_OPROFILE 10 select HAVE_GENERIC_DMA_COHERENT 11 select HAVE_ARCH_TRACEHOOK 12 select HAVE_DMA_API_DEBUG 13 select HAVE_DMA_ATTRS 14 select HAVE_IRQ_WORK 15 select HAVE_PERF_EVENTS 16 select ARCH_HAVE_NMI_SAFE_CMPXCHG if (GUSA_RB || CPU_SH4A) 17 select PERF_USE_VMALLOC 18 select HAVE_KERNEL_GZIP 19 select HAVE_KERNEL_BZIP2 20 select HAVE_KERNEL_LZMA 21 select HAVE_KERNEL_XZ 22 select HAVE_KERNEL_LZO 23 select HAVE_SYSCALL_TRACEPOINTS 24 select HAVE_REGS_AND_STACK_ACCESS_API 25 select HAVE_GENERIC_HARDIRQS 26 select MAY_HAVE_SPARSE_IRQ 27 select IRQ_FORCED_THREADING 28 select RTC_LIB 29 select GENERIC_ATOMIC64 30 select GENERIC_IRQ_SHOW 31 help 32 The SuperH is a RISC processor targeted for use in embedded systems 33 and consumer electronics; it was also used in the Sega Dreamcast 34 gaming console. The SuperH port has a home page at 35 <http://www.linux-sh.org/>. 36 37config SUPERH32 38 def_bool ARCH = "sh" 39 select HAVE_KPROBES 40 select HAVE_KRETPROBES 41 select HAVE_IOREMAP_PROT if MMU && !X2TLB 42 select HAVE_FUNCTION_TRACER 43 select HAVE_FTRACE_MCOUNT_RECORD 44 select HAVE_DYNAMIC_FTRACE 45 select HAVE_FUNCTION_TRACE_MCOUNT_TEST 46 select HAVE_FTRACE_NMI_ENTER if DYNAMIC_FTRACE 47 select HAVE_FUNCTION_GRAPH_TRACER 48 select HAVE_ARCH_KGDB 49 select HAVE_HW_BREAKPOINT 50 select HAVE_MIXED_BREAKPOINTS_REGS 51 select PERF_EVENTS 52 select ARCH_HIBERNATION_POSSIBLE if MMU 53 select SPARSE_IRQ 54 55config SUPERH64 56 def_bool ARCH = "sh64" 57 58config ARCH_DEFCONFIG 59 string 60 default "arch/sh/configs/shx3_defconfig" if SUPERH32 61 default "arch/sh/configs/cayman_defconfig" if SUPERH64 62 63config RWSEM_GENERIC_SPINLOCK 64 def_bool y 65 66config RWSEM_XCHGADD_ALGORITHM 67 bool 68 69config GENERIC_BUG 70 def_bool y 71 depends on BUG && SUPERH32 72 73config GENERIC_CSUM 74 def_bool y 75 depends on SUPERH64 76 77config GENERIC_HWEIGHT 78 def_bool y 79 80config IRQ_PER_CPU 81 def_bool y 82 83config GENERIC_GPIO 84 def_bool n 85 86config GENERIC_CALIBRATE_DELAY 87 bool 88 89config GENERIC_CLOCKEVENTS 90 def_bool y 91 92config GENERIC_CLOCKEVENTS_BROADCAST 93 bool 94 95config GENERIC_CMOS_UPDATE 96 def_bool y 97 depends on SH_SH03 || SH_DREAMCAST 98 99config GENERIC_LOCKBREAK 100 def_bool y 101 depends on SMP && PREEMPT 102 103config ARCH_SUSPEND_POSSIBLE 104 def_bool n 105 106config ARCH_HIBERNATION_POSSIBLE 107 def_bool n 108 109config SYS_SUPPORTS_APM_EMULATION 110 bool 111 select ARCH_SUSPEND_POSSIBLE 112 113config SYS_SUPPORTS_HUGETLBFS 114 bool 115 116config SYS_SUPPORTS_SMP 117 bool 118 119config SYS_SUPPORTS_NUMA 120 bool 121 122config SYS_SUPPORTS_PCI 123 bool 124 125config SYS_SUPPORTS_CMT 126 bool 127 128config SYS_SUPPORTS_MTU2 129 bool 130 131config SYS_SUPPORTS_TMU 132 bool 133 134config STACKTRACE_SUPPORT 135 def_bool y 136 137config LOCKDEP_SUPPORT 138 def_bool y 139 140config HAVE_LATENCYTOP_SUPPORT 141 def_bool y 142 143config ARCH_HAS_ILOG2_U32 144 def_bool n 145 146config ARCH_HAS_ILOG2_U64 147 def_bool n 148 149config ARCH_NO_VIRT_TO_BUS 150 def_bool y 151 152config ARCH_HAS_DEFAULT_IDLE 153 def_bool y 154 155config ARCH_HAS_CPU_IDLE_WAIT 156 def_bool y 157 158config NO_IOPORT 159 def_bool !PCI 160 depends on !SH_CAYMAN && !SH_SH4202_MICRODEV && !SH_SHMIN 161 162config IO_TRAPPED 163 bool 164 165config SWAP_IO_SPACE 166 bool 167 168config DMA_COHERENT 169 bool 170 171config DMA_NONCOHERENT 172 def_bool !DMA_COHERENT 173 174config NEED_DMA_MAP_STATE 175 def_bool DMA_NONCOHERENT 176 177config NEED_SG_DMA_LENGTH 178 def_bool y 179 180source "init/Kconfig" 181 182source "kernel/Kconfig.freezer" 183 184menu "System type" 185 186# 187# Processor families 188# 189config CPU_SH2 190 bool 191 192config CPU_SH2A 193 bool 194 select CPU_SH2 195 select UNCACHED_MAPPING 196 197config CPU_SH3 198 bool 199 select CPU_HAS_INTEVT 200 select CPU_HAS_SR_RB 201 select SYS_SUPPORTS_TMU 202 203config CPU_SH4 204 bool 205 select CPU_HAS_INTEVT 206 select CPU_HAS_SR_RB 207 select CPU_HAS_FPU if !CPU_SH4AL_DSP 208 select SYS_SUPPORTS_TMU 209 select SYS_SUPPORTS_HUGETLBFS if MMU 210 211config CPU_SH4A 212 bool 213 select CPU_SH4 214 215config CPU_SH4AL_DSP 216 bool 217 select CPU_SH4A 218 select CPU_HAS_DSP 219 220config CPU_SH5 221 bool 222 select CPU_HAS_FPU 223 select SYS_SUPPORTS_TMU 224 select SYS_SUPPORTS_HUGETLBFS if MMU 225 226config CPU_SHX2 227 bool 228 229config CPU_SHX3 230 bool 231 select DMA_COHERENT 232 select SYS_SUPPORTS_SMP 233 select SYS_SUPPORTS_NUMA 234 235config ARCH_SHMOBILE 236 bool 237 select ARCH_SUSPEND_POSSIBLE 238 select PM 239 select PM_RUNTIME 240 241config CPU_HAS_PMU 242 depends on CPU_SH4 || CPU_SH4A 243 default y 244 bool 245 246if SUPERH32 247 248choice 249 prompt "Processor sub-type selection" 250 251# 252# Processor subtypes 253# 254 255# SH-2 Processor Support 256 257config CPU_SUBTYPE_SH7619 258 bool "Support SH7619 processor" 259 select CPU_SH2 260 select SYS_SUPPORTS_CMT 261 262# SH-2A Processor Support 263 264config CPU_SUBTYPE_SH7201 265 bool "Support SH7201 processor" 266 select CPU_SH2A 267 select CPU_HAS_FPU 268 select SYS_SUPPORTS_MTU2 269 270config CPU_SUBTYPE_SH7203 271 bool "Support SH7203 processor" 272 select CPU_SH2A 273 select CPU_HAS_FPU 274 select SYS_SUPPORTS_CMT 275 select SYS_SUPPORTS_MTU2 276 select ARCH_WANT_OPTIONAL_GPIOLIB 277 278config CPU_SUBTYPE_SH7206 279 bool "Support SH7206 processor" 280 select CPU_SH2A 281 select SYS_SUPPORTS_CMT 282 select SYS_SUPPORTS_MTU2 283 284config CPU_SUBTYPE_SH7263 285 bool "Support SH7263 processor" 286 select CPU_SH2A 287 select CPU_HAS_FPU 288 select SYS_SUPPORTS_CMT 289 select SYS_SUPPORTS_MTU2 290 291config CPU_SUBTYPE_SH7264 292 bool "Support SH7264 processor" 293 select CPU_SH2A 294 select CPU_HAS_FPU 295 select SYS_SUPPORTS_CMT 296 select SYS_SUPPORTS_MTU2 297 298config CPU_SUBTYPE_SH7269 299 bool "Support SH7269 processor" 300 select CPU_SH2A 301 select CPU_HAS_FPU 302 select SYS_SUPPORTS_CMT 303 select SYS_SUPPORTS_MTU2 304 305config CPU_SUBTYPE_MXG 306 bool "Support MX-G processor" 307 select CPU_SH2A 308 select SYS_SUPPORTS_MTU2 309 help 310 Select MX-G if running on an R8A03022BG part. 311 312# SH-3 Processor Support 313 314config CPU_SUBTYPE_SH7705 315 bool "Support SH7705 processor" 316 select CPU_SH3 317 318config CPU_SUBTYPE_SH7706 319 bool "Support SH7706 processor" 320 select CPU_SH3 321 help 322 Select SH7706 if you have a 133 Mhz SH-3 HD6417706 CPU. 323 324config CPU_SUBTYPE_SH7707 325 bool "Support SH7707 processor" 326 select CPU_SH3 327 help 328 Select SH7707 if you have a 60 Mhz SH-3 HD6417707 CPU. 329 330config CPU_SUBTYPE_SH7708 331 bool "Support SH7708 processor" 332 select CPU_SH3 333 help 334 Select SH7708 if you have a 60 Mhz SH-3 HD6417708S or 335 if you have a 100 Mhz SH-3 HD6417708R CPU. 336 337config CPU_SUBTYPE_SH7709 338 bool "Support SH7709 processor" 339 select CPU_SH3 340 help 341 Select SH7709 if you have a 80 Mhz SH-3 HD6417709 CPU. 342 343config CPU_SUBTYPE_SH7710 344 bool "Support SH7710 processor" 345 select CPU_SH3 346 select CPU_HAS_DSP 347 help 348 Select SH7710 if you have a SH3-DSP SH7710 CPU. 349 350config CPU_SUBTYPE_SH7712 351 bool "Support SH7712 processor" 352 select CPU_SH3 353 select CPU_HAS_DSP 354 help 355 Select SH7712 if you have a SH3-DSP SH7712 CPU. 356 357config CPU_SUBTYPE_SH7720 358 bool "Support SH7720 processor" 359 select CPU_SH3 360 select CPU_HAS_DSP 361 select SYS_SUPPORTS_CMT 362 select ARCH_WANT_OPTIONAL_GPIOLIB 363 select USB_ARCH_HAS_OHCI 364 select USB_OHCI_SH if USB_OHCI_HCD 365 help 366 Select SH7720 if you have a SH3-DSP SH7720 CPU. 367 368config CPU_SUBTYPE_SH7721 369 bool "Support SH7721 processor" 370 select CPU_SH3 371 select CPU_HAS_DSP 372 select SYS_SUPPORTS_CMT 373 select USB_ARCH_HAS_OHCI 374 select USB_OHCI_SH if USB_OHCI_HCD 375 help 376 Select SH7721 if you have a SH3-DSP SH7721 CPU. 377 378# SH-4 Processor Support 379 380config CPU_SUBTYPE_SH7750 381 bool "Support SH7750 processor" 382 select CPU_SH4 383 help 384 Select SH7750 if you have a 200 Mhz SH-4 HD6417750 CPU. 385 386config CPU_SUBTYPE_SH7091 387 bool "Support SH7091 processor" 388 select CPU_SH4 389 help 390 Select SH7091 if you have an SH-4 based Sega device (such as 391 the Dreamcast, Naomi, and Naomi 2). 392 393config CPU_SUBTYPE_SH7750R 394 bool "Support SH7750R processor" 395 select CPU_SH4 396 397config CPU_SUBTYPE_SH7750S 398 bool "Support SH7750S processor" 399 select CPU_SH4 400 401config CPU_SUBTYPE_SH7751 402 bool "Support SH7751 processor" 403 select CPU_SH4 404 help 405 Select SH7751 if you have a 166 Mhz SH-4 HD6417751 CPU, 406 or if you have a HD6417751R CPU. 407 408config CPU_SUBTYPE_SH7751R 409 bool "Support SH7751R processor" 410 select CPU_SH4 411 412config CPU_SUBTYPE_SH7760 413 bool "Support SH7760 processor" 414 select CPU_SH4 415 416config CPU_SUBTYPE_SH4_202 417 bool "Support SH4-202 processor" 418 select CPU_SH4 419 420# SH-4A Processor Support 421 422config CPU_SUBTYPE_SH7723 423 bool "Support SH7723 processor" 424 select CPU_SH4A 425 select CPU_SHX2 426 select ARCH_SHMOBILE 427 select ARCH_SPARSEMEM_ENABLE 428 select SYS_SUPPORTS_CMT 429 select ARCH_WANT_OPTIONAL_GPIOLIB 430 help 431 Select SH7723 if you have an SH-MobileR2 CPU. 432 433config CPU_SUBTYPE_SH7724 434 bool "Support SH7724 processor" 435 select CPU_SH4A 436 select CPU_SHX2 437 select ARCH_SHMOBILE 438 select ARCH_SPARSEMEM_ENABLE 439 select SYS_SUPPORTS_CMT 440 select ARCH_WANT_OPTIONAL_GPIOLIB 441 help 442 Select SH7724 if you have an SH-MobileR2R CPU. 443 444config CPU_SUBTYPE_SH7734 445 bool "Support SH7734 processor" 446 select CPU_SH4A 447 select CPU_SHX2 448 select ARCH_WANT_OPTIONAL_GPIOLIB 449 select USB_ARCH_HAS_OHCI 450 select USB_ARCH_HAS_EHCI 451 help 452 Select SH7734 if you have a SH4A SH7734 CPU. 453 454config CPU_SUBTYPE_SH7757 455 bool "Support SH7757 processor" 456 select CPU_SH4A 457 select CPU_SHX2 458 select ARCH_WANT_OPTIONAL_GPIOLIB 459 select USB_ARCH_HAS_OHCI 460 select USB_ARCH_HAS_EHCI 461 help 462 Select SH7757 if you have a SH4A SH7757 CPU. 463 464config CPU_SUBTYPE_SH7763 465 bool "Support SH7763 processor" 466 select CPU_SH4A 467 select USB_ARCH_HAS_OHCI 468 select USB_OHCI_SH if USB_OHCI_HCD 469 help 470 Select SH7763 if you have a SH4A SH7763(R5S77631) CPU. 471 472config CPU_SUBTYPE_SH7770 473 bool "Support SH7770 processor" 474 select CPU_SH4A 475 476config CPU_SUBTYPE_SH7780 477 bool "Support SH7780 processor" 478 select CPU_SH4A 479 480config CPU_SUBTYPE_SH7785 481 bool "Support SH7785 processor" 482 select CPU_SH4A 483 select CPU_SHX2 484 select ARCH_SPARSEMEM_ENABLE 485 select SYS_SUPPORTS_NUMA 486 select ARCH_WANT_OPTIONAL_GPIOLIB 487 488config CPU_SUBTYPE_SH7786 489 bool "Support SH7786 processor" 490 select CPU_SH4A 491 select CPU_SHX3 492 select CPU_HAS_PTEAEX 493 select GENERIC_CLOCKEVENTS_BROADCAST if SMP 494 select ARCH_WANT_OPTIONAL_GPIOLIB 495 select USB_ARCH_HAS_OHCI 496 select USB_OHCI_SH if USB_OHCI_HCD 497 select USB_ARCH_HAS_EHCI 498 select USB_EHCI_SH if USB_EHCI_HCD 499 500config 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 ARCH_REQUIRE_GPIOLIB 506 507# SH4AL-DSP Processor Support 508 509config CPU_SUBTYPE_SH7343 510 bool "Support SH7343 processor" 511 select CPU_SH4AL_DSP 512 select ARCH_SHMOBILE 513 select SYS_SUPPORTS_CMT 514 515config CPU_SUBTYPE_SH7722 516 bool "Support SH7722 processor" 517 select CPU_SH4AL_DSP 518 select CPU_SHX2 519 select ARCH_SHMOBILE 520 select ARCH_SPARSEMEM_ENABLE 521 select SYS_SUPPORTS_NUMA 522 select SYS_SUPPORTS_CMT 523 select ARCH_WANT_OPTIONAL_GPIOLIB 524 525config CPU_SUBTYPE_SH7366 526 bool "Support SH7366 processor" 527 select CPU_SH4AL_DSP 528 select CPU_SHX2 529 select ARCH_SHMOBILE 530 select ARCH_SPARSEMEM_ENABLE 531 select SYS_SUPPORTS_NUMA 532 select SYS_SUPPORTS_CMT 533 534endchoice 535 536endif 537 538if SUPERH64 539 540choice 541 prompt "Processor sub-type selection" 542 543# SH-5 Processor Support 544 545config CPU_SUBTYPE_SH5_101 546 bool "Support SH5-101 processor" 547 select CPU_SH5 548 549config CPU_SUBTYPE_SH5_103 550 bool "Support SH5-103 processor" 551 select CPU_SH5 552 553endchoice 554 555endif 556 557source "arch/sh/mm/Kconfig" 558 559source "arch/sh/Kconfig.cpu" 560 561source "arch/sh/boards/Kconfig" 562 563menu "Timer and clock configuration" 564 565config SH_TIMER_TMU 566 bool "TMU timer driver" 567 depends on SYS_SUPPORTS_TMU 568 default y 569 help 570 This enables the build of the TMU timer driver. 571 572config SH_TIMER_CMT 573 bool "CMT timer driver" 574 depends on SYS_SUPPORTS_CMT 575 default y 576 help 577 This enables build of the CMT timer driver. 578 579config SH_TIMER_MTU2 580 bool "MTU2 timer driver" 581 depends on SYS_SUPPORTS_MTU2 582 default y 583 help 584 This enables build of the MTU2 timer driver. 585 586config SH_PCLK_FREQ 587 int "Peripheral clock frequency (in Hz)" 588 depends on SH_CLK_CPG_LEGACY 589 default "31250000" if CPU_SUBTYPE_SH7619 590 default "33333333" if CPU_SUBTYPE_SH7770 || \ 591 CPU_SUBTYPE_SH7760 || \ 592 CPU_SUBTYPE_SH7705 || \ 593 CPU_SUBTYPE_SH7203 || \ 594 CPU_SUBTYPE_SH7206 || \ 595 CPU_SUBTYPE_SH7263 || \ 596 CPU_SUBTYPE_MXG 597 default "60000000" if CPU_SUBTYPE_SH7751 || CPU_SUBTYPE_SH7751R 598 default "66000000" if CPU_SUBTYPE_SH4_202 599 default "50000000" 600 help 601 This option is used to specify the peripheral clock frequency. 602 This is necessary for determining the reference clock value on 603 platforms lacking an RTC. 604 605config SH_CLK_CPG 606 def_bool y 607 608config SH_CLK_CPG_LEGACY 609 depends on SH_CLK_CPG 610 def_bool y if !CPU_SUBTYPE_SH7785 && !ARCH_SHMOBILE && \ 611 !CPU_SHX3 && !CPU_SUBTYPE_SH7757 && \ 612 !CPU_SUBTYPE_SH7734 && !CPU_SUBTYPE_SH7264 && \ 613 !CPU_SUBTYPE_SH7269 614 615source "kernel/time/Kconfig" 616 617endmenu 618 619menu "CPU Frequency scaling" 620 621source "drivers/cpufreq/Kconfig" 622 623config SH_CPU_FREQ 624 tristate "SuperH CPU Frequency driver" 625 depends on CPU_FREQ 626 select CPU_FREQ_TABLE 627 help 628 This adds the cpufreq driver for SuperH. Any CPU that supports 629 clock rate rounding through the clock framework can use this 630 driver. While it will make the kernel slightly larger, this is 631 harmless for CPUs that don't support rate rounding. The driver 632 will also generate a notice in the boot log before disabling 633 itself if the CPU in question is not capable of rate rounding. 634 635 For details, take a look at <file:Documentation/cpu-freq>. 636 637 If unsure, say N. 638 639endmenu 640 641source "arch/sh/drivers/Kconfig" 642 643endmenu 644 645menu "Kernel features" 646 647source kernel/Kconfig.hz 648 649config KEXEC 650 bool "kexec system call (EXPERIMENTAL)" 651 depends on SUPERH32 && EXPERIMENTAL && MMU 652 help 653 kexec is a system call that implements the ability to shutdown your 654 current kernel, and to start another kernel. It is like a reboot 655 but it is independent of the system firmware. And like a reboot 656 you can start any kernel with it, not just Linux. 657 658 The name comes from the similarity to the exec system call. 659 660 It is an ongoing process to be certain the hardware in a machine 661 is properly shutdown, so do not be surprised if this code does not 662 initially work for you. It may help to enable device hotplugging 663 support. As of this writing the exact hardware interface is 664 strongly in flux, so no good recommendation can be made. 665 666config CRASH_DUMP 667 bool "kernel crash dumps (EXPERIMENTAL)" 668 depends on SUPERH32 && EXPERIMENTAL && BROKEN_ON_SMP 669 help 670 Generate crash dump after being started by kexec. 671 This should be normally only set in special crash dump kernels 672 which are loaded in the main kernel with kexec-tools into 673 a specially reserved region and then later executed after 674 a crash by kdump/kexec. The crash dump kernel must be compiled 675 to a memory address not used by the main kernel using 676 PHYSICAL_START. 677 678 For more details see Documentation/kdump/kdump.txt 679 680config KEXEC_JUMP 681 bool "kexec jump (EXPERIMENTAL)" 682 depends on SUPERH32 && KEXEC && HIBERNATION && EXPERIMENTAL 683 help 684 Jump between original kernel and kexeced kernel and invoke 685 code via KEXEC 686 687config PHYSICAL_START 688 hex "Physical address where the kernel is loaded" if (EXPERT || CRASH_DUMP) 689 default MEMORY_START 690 ---help--- 691 This gives the physical address where the kernel is loaded 692 and is ordinarily the same as MEMORY_START. 693 694 Different values are primarily used in the case of kexec on panic 695 where the fail safe kernel needs to run at a different address 696 than the panic-ed kernel. 697 698config SECCOMP 699 bool "Enable seccomp to safely compute untrusted bytecode" 700 depends on PROC_FS 701 help 702 This kernel feature is useful for number crunching applications 703 that may need to compute untrusted bytecode during their 704 execution. By using pipes or other transports made available to 705 the process as file descriptors supporting the read/write 706 syscalls, it's possible to isolate those applications in 707 their own address space using seccomp. Once seccomp is 708 enabled via prctl, it cannot be disabled and the task is only 709 allowed to execute a few safe syscalls defined by each seccomp 710 mode. 711 712 If unsure, say N. 713 714config CC_STACKPROTECTOR 715 bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)" 716 depends on SUPERH32 && EXPERIMENTAL 717 help 718 This option turns on the -fstack-protector GCC feature. This 719 feature puts, at the beginning of functions, a canary value on 720 the stack just before the return address, and validates 721 the value just before actually returning. Stack based buffer 722 overflows (that need to overwrite this return address) now also 723 overwrite the canary, which gets detected and the attack is then 724 neutralized via a kernel panic. 725 726 This feature requires gcc version 4.2 or above. 727 728config SMP 729 bool "Symmetric multi-processing support" 730 depends on SYS_SUPPORTS_SMP 731 select USE_GENERIC_SMP_HELPERS 732 ---help--- 733 This enables support for systems with more than one CPU. If you have 734 a system with only one CPU, like most personal computers, say N. If 735 you have a system with more than one CPU, say Y. 736 737 If you say N here, the kernel will run on single and multiprocessor 738 machines, but will use only one CPU of a multiprocessor machine. If 739 you say Y here, the kernel will run on many, but not all, 740 singleprocessor machines. On a singleprocessor machine, the kernel 741 will run faster if you say N here. 742 743 People using multiprocessor machines who say Y here should also say 744 Y to "Enhanced Real Time Clock Support", below. 745 746 See also <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO 747 available at <http://www.tldp.org/docs.html#howto>. 748 749 If you don't know what to do here, say N. 750 751config NR_CPUS 752 int "Maximum number of CPUs (2-32)" 753 range 2 32 754 depends on SMP 755 default "4" if CPU_SUBTYPE_SHX3 756 default "2" 757 help 758 This allows you to specify the maximum number of CPUs which this 759 kernel will support. The maximum supported value is 32 and the 760 minimum value which makes sense is 2. 761 762 This is purely to save memory - each supported CPU adds 763 approximately eight kilobytes to the kernel image. 764 765config HOTPLUG_CPU 766 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)" 767 depends on SMP && HOTPLUG && EXPERIMENTAL 768 help 769 Say Y here to experiment with turning CPUs off and on. CPUs 770 can be controlled through /sys/devices/system/cpu. 771 772source "kernel/Kconfig.preempt" 773 774config GUSA 775 def_bool y 776 depends on !SMP && SUPERH32 777 help 778 This enables support for gUSA (general UserSpace Atomicity). 779 This is the default implementation for both UP and non-ll/sc 780 CPUs, and is used by the libc, amongst others. 781 782 For additional information, design information can be found 783 in <http://lc.linux.or.jp/lc2002/papers/niibe0919p.pdf>. 784 785 This should only be disabled for special cases where alternate 786 atomicity implementations exist. 787 788config GUSA_RB 789 bool "Implement atomic operations by roll-back (gRB) (EXPERIMENTAL)" 790 depends on GUSA && CPU_SH3 || (CPU_SH4 && !CPU_SH4A) 791 help 792 Enabling this option will allow the kernel to implement some 793 atomic operations using a software implementation of load-locked/ 794 store-conditional (LLSC). On machines which do not have hardware 795 LLSC, this should be more efficient than the other alternative of 796 disabling interrupts around the atomic sequence. 797 798config HW_PERF_EVENTS 799 bool "Enable hardware performance counter support for perf events" 800 depends on PERF_EVENTS && CPU_HAS_PMU 801 default y 802 help 803 Enable hardware performance counter support for perf events. If 804 disabled, perf events will use software events only. 805 806source "drivers/sh/Kconfig" 807 808endmenu 809 810menu "Boot options" 811 812config ZERO_PAGE_OFFSET 813 hex 814 default "0x00010000" if PAGE_SIZE_64KB || SH_RTS7751R2D || \ 815 SH_7751_SOLUTION_ENGINE 816 default "0x00004000" if PAGE_SIZE_16KB || SH_SH03 817 default "0x00002000" if PAGE_SIZE_8KB 818 default "0x00001000" 819 help 820 This sets the default offset of zero page. 821 822config BOOT_LINK_OFFSET 823 hex 824 default "0x00210000" if SH_SHMIN 825 default "0x00400000" if SH_CAYMAN 826 default "0x00810000" if SH_7780_SOLUTION_ENGINE 827 default "0x009e0000" if SH_TITAN 828 default "0x01800000" if SH_SDK7780 829 default "0x02000000" if SH_EDOSK7760 830 default "0x00800000" 831 help 832 This option allows you to set the link address offset of the zImage. 833 This can be useful if you are on a board which has a small amount of 834 memory. 835 836config ENTRY_OFFSET 837 hex 838 default "0x00001000" if PAGE_SIZE_4KB 839 default "0x00002000" if PAGE_SIZE_8KB 840 default "0x00004000" if PAGE_SIZE_16KB 841 default "0x00010000" if PAGE_SIZE_64KB 842 default "0x00000000" 843 844config ROMIMAGE_MMCIF 845 bool "Include MMCIF loader in romImage (EXPERIMENTAL)" 846 depends on CPU_SUBTYPE_SH7724 && EXPERIMENTAL 847 help 848 Say Y here to include experimental MMCIF loading code in 849 romImage. With this enabled it is possible to write the romImage 850 kernel image to an MMC card and boot the kernel straight from 851 the reset vector. At reset the processor Mask ROM will load the 852 first part of the romImage which in turn loads the rest the kernel 853 image to RAM using the MMCIF hardware block. 854 855choice 856 prompt "Kernel command line" 857 optional 858 default CMDLINE_OVERWRITE 859 help 860 Setting this option allows the kernel command line arguments 861 to be set. 862 863config CMDLINE_OVERWRITE 864 bool "Overwrite bootloader kernel arguments" 865 help 866 Given string will overwrite any arguments passed in by 867 a bootloader. 868 869config CMDLINE_EXTEND 870 bool "Extend bootloader kernel arguments" 871 help 872 Given string will be concatenated with arguments passed in 873 by a bootloader. 874 875endchoice 876 877config CMDLINE 878 string "Kernel command line arguments string" 879 depends on CMDLINE_OVERWRITE || CMDLINE_EXTEND 880 default "console=ttySC1,115200" 881 882endmenu 883 884menu "Bus options" 885 886config SUPERHYWAY 887 tristate "SuperHyway Bus support" 888 depends on CPU_SUBTYPE_SH4_202 889 890config MAPLE 891 bool "Maple Bus support" 892 depends on SH_DREAMCAST 893 help 894 The Maple Bus is SEGA's serial communication bus for peripherals 895 on the Dreamcast. Without this bus support you won't be able to 896 get your Dreamcast keyboard etc to work, so most users 897 probably want to say 'Y' here, unless you are only using the 898 Dreamcast with a serial line terminal or a remote network 899 connection. 900 901config PCI 902 bool "PCI support" 903 depends on SYS_SUPPORTS_PCI 904 select PCI_DOMAINS 905 select GENERIC_PCI_IOMAP 906 select NO_GENERIC_PCI_IOPORT_MAP 907 help 908 Find out whether you have a PCI motherboard. PCI is the name of a 909 bus system, i.e. the way the CPU talks to the other stuff inside 910 your box. If you have PCI, say Y, otherwise N. 911 912config PCI_DOMAINS 913 bool 914 915source "drivers/pci/pcie/Kconfig" 916 917source "drivers/pci/Kconfig" 918 919source "drivers/pcmcia/Kconfig" 920 921source "drivers/pci/hotplug/Kconfig" 922 923endmenu 924 925menu "Executable file formats" 926 927source "fs/Kconfig.binfmt" 928 929endmenu 930 931menu "Power management options (EXPERIMENTAL)" 932depends on EXPERIMENTAL 933 934source "kernel/power/Kconfig" 935 936source "drivers/cpuidle/Kconfig" 937 938endmenu 939 940source "net/Kconfig" 941 942source "drivers/Kconfig" 943 944source "fs/Kconfig" 945 946source "arch/sh/Kconfig.debug" 947 948source "security/Kconfig" 949 950source "crypto/Kconfig" 951 952source "lib/Kconfig" 953