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_CUSTOM_GPIO_H 17 select ARCH_HAVE_NMI_SAFE_CMPXCHG if (GUSA_RB || CPU_SH4A) 18 select PERF_USE_VMALLOC 19 select HAVE_KERNEL_GZIP 20 select HAVE_KERNEL_BZIP2 21 select HAVE_KERNEL_LZMA 22 select HAVE_KERNEL_XZ 23 select HAVE_KERNEL_LZO 24 select HAVE_SYSCALL_TRACEPOINTS 25 select HAVE_REGS_AND_STACK_ACCESS_API 26 select HAVE_GENERIC_HARDIRQS 27 select MAY_HAVE_SPARSE_IRQ 28 select IRQ_FORCED_THREADING 29 select RTC_LIB 30 select GENERIC_ATOMIC64 31 select GENERIC_IRQ_SHOW 32 select GENERIC_SMP_IDLE_THREAD 33 select GENERIC_CLOCKEVENTS 34 select GENERIC_CMOS_UPDATE if SH_SH03 || SH_DREAMCAST 35 select GENERIC_STRNCPY_FROM_USER 36 select GENERIC_STRNLEN_USER 37 help 38 The SuperH is a RISC processor targeted for use in embedded systems 39 and consumer electronics; it was also used in the Sega Dreamcast 40 gaming console. The SuperH port has a home page at 41 <http://www.linux-sh.org/>. 42 43config SUPERH32 44 def_bool ARCH = "sh" 45 select HAVE_KPROBES 46 select HAVE_KRETPROBES 47 select HAVE_IOREMAP_PROT if MMU && !X2TLB 48 select HAVE_FUNCTION_TRACER 49 select HAVE_FTRACE_MCOUNT_RECORD 50 select HAVE_DYNAMIC_FTRACE 51 select HAVE_FUNCTION_TRACE_MCOUNT_TEST 52 select HAVE_FTRACE_NMI_ENTER if DYNAMIC_FTRACE 53 select HAVE_FUNCTION_GRAPH_TRACER 54 select HAVE_ARCH_KGDB 55 select HAVE_HW_BREAKPOINT 56 select HAVE_MIXED_BREAKPOINTS_REGS 57 select PERF_EVENTS 58 select ARCH_HIBERNATION_POSSIBLE if MMU 59 select SPARSE_IRQ 60 61config SUPERH64 62 def_bool ARCH = "sh64" 63 select KALLSYMS 64 65config ARCH_DEFCONFIG 66 string 67 default "arch/sh/configs/shx3_defconfig" if SUPERH32 68 default "arch/sh/configs/cayman_defconfig" if SUPERH64 69 70config RWSEM_GENERIC_SPINLOCK 71 def_bool y 72 73config RWSEM_XCHGADD_ALGORITHM 74 bool 75 76config GENERIC_BUG 77 def_bool y 78 depends on BUG && SUPERH32 79 80config GENERIC_CSUM 81 def_bool y 82 depends on SUPERH64 83 84config GENERIC_HWEIGHT 85 def_bool y 86 87config IRQ_PER_CPU 88 def_bool y 89 90config GENERIC_GPIO 91 def_bool n 92 93config GENERIC_CALIBRATE_DELAY 94 bool 95 96config GENERIC_LOCKBREAK 97 def_bool y 98 depends on SMP && PREEMPT 99 100config ARCH_SUSPEND_POSSIBLE 101 def_bool n 102 103config ARCH_HIBERNATION_POSSIBLE 104 def_bool n 105 106config SYS_SUPPORTS_APM_EMULATION 107 bool 108 select ARCH_SUSPEND_POSSIBLE 109 110config SYS_SUPPORTS_HUGETLBFS 111 bool 112 113config SYS_SUPPORTS_SMP 114 bool 115 116config SYS_SUPPORTS_NUMA 117 bool 118 119config SYS_SUPPORTS_PCI 120 bool 121 122config SYS_SUPPORTS_CMT 123 bool 124 125config SYS_SUPPORTS_MTU2 126 bool 127 128config SYS_SUPPORTS_TMU 129 bool 130 131config STACKTRACE_SUPPORT 132 def_bool y 133 134config LOCKDEP_SUPPORT 135 def_bool y 136 137config HAVE_LATENCYTOP_SUPPORT 138 def_bool y 139 140config ARCH_HAS_ILOG2_U32 141 def_bool n 142 143config ARCH_HAS_ILOG2_U64 144 def_bool n 145 146config ARCH_NO_VIRT_TO_BUS 147 def_bool y 148 149config ARCH_HAS_DEFAULT_IDLE 150 def_bool y 151 152config NO_IOPORT 153 def_bool !PCI 154 depends on !SH_CAYMAN && !SH_SH4202_MICRODEV && !SH_SHMIN && \ 155 !SH_HP6XX && !SH_SOLUTION_ENGINE 156 157config IO_TRAPPED 158 bool 159 160config SWAP_IO_SPACE 161 bool 162 163config DMA_COHERENT 164 bool 165 166config DMA_NONCOHERENT 167 def_bool !DMA_COHERENT 168 169config NEED_DMA_MAP_STATE 170 def_bool DMA_NONCOHERENT 171 172config NEED_SG_DMA_LENGTH 173 def_bool y 174 175source "init/Kconfig" 176 177source "kernel/Kconfig.freezer" 178 179menu "System type" 180 181# 182# Processor families 183# 184config CPU_SH2 185 bool 186 187config CPU_SH2A 188 bool 189 select CPU_SH2 190 select UNCACHED_MAPPING 191 192config CPU_SH3 193 bool 194 select CPU_HAS_INTEVT 195 select CPU_HAS_SR_RB 196 select SYS_SUPPORTS_TMU 197 198config CPU_SH4 199 bool 200 select CPU_HAS_INTEVT 201 select CPU_HAS_SR_RB 202 select CPU_HAS_FPU if !CPU_SH4AL_DSP 203 select SYS_SUPPORTS_TMU 204 select SYS_SUPPORTS_HUGETLBFS if MMU 205 206config CPU_SH4A 207 bool 208 select CPU_SH4 209 210config CPU_SH4AL_DSP 211 bool 212 select CPU_SH4A 213 select CPU_HAS_DSP 214 215config CPU_SH5 216 bool 217 select CPU_HAS_FPU 218 select SYS_SUPPORTS_TMU 219 select SYS_SUPPORTS_HUGETLBFS if MMU 220 221config CPU_SHX2 222 bool 223 224config CPU_SHX3 225 bool 226 select DMA_COHERENT 227 select SYS_SUPPORTS_SMP 228 select SYS_SUPPORTS_NUMA 229 230config ARCH_SHMOBILE 231 bool 232 select ARCH_SUSPEND_POSSIBLE 233 select PM 234 select PM_RUNTIME 235 236config CPU_HAS_PMU 237 depends on CPU_SH4 || CPU_SH4A 238 default y 239 bool 240 241if SUPERH32 242 243choice 244 prompt "Processor sub-type selection" 245 246# 247# Processor subtypes 248# 249 250# SH-2 Processor Support 251 252config CPU_SUBTYPE_SH7619 253 bool "Support SH7619 processor" 254 select CPU_SH2 255 select SYS_SUPPORTS_CMT 256 257# SH-2A Processor Support 258 259config CPU_SUBTYPE_SH7201 260 bool "Support SH7201 processor" 261 select CPU_SH2A 262 select CPU_HAS_FPU 263 select SYS_SUPPORTS_MTU2 264 265config CPU_SUBTYPE_SH7203 266 bool "Support SH7203 processor" 267 select CPU_SH2A 268 select CPU_HAS_FPU 269 select SYS_SUPPORTS_CMT 270 select SYS_SUPPORTS_MTU2 271 select ARCH_WANT_OPTIONAL_GPIOLIB 272 273config CPU_SUBTYPE_SH7206 274 bool "Support SH7206 processor" 275 select CPU_SH2A 276 select SYS_SUPPORTS_CMT 277 select SYS_SUPPORTS_MTU2 278 279config CPU_SUBTYPE_SH7263 280 bool "Support SH7263 processor" 281 select CPU_SH2A 282 select CPU_HAS_FPU 283 select SYS_SUPPORTS_CMT 284 select SYS_SUPPORTS_MTU2 285 286config CPU_SUBTYPE_SH7264 287 bool "Support SH7264 processor" 288 select CPU_SH2A 289 select CPU_HAS_FPU 290 select SYS_SUPPORTS_CMT 291 select SYS_SUPPORTS_MTU2 292 293config CPU_SUBTYPE_SH7269 294 bool "Support SH7269 processor" 295 select CPU_SH2A 296 select CPU_HAS_FPU 297 select SYS_SUPPORTS_CMT 298 select SYS_SUPPORTS_MTU2 299 300config CPU_SUBTYPE_MXG 301 bool "Support MX-G processor" 302 select CPU_SH2A 303 select SYS_SUPPORTS_MTU2 304 help 305 Select MX-G if running on an R8A03022BG part. 306 307# SH-3 Processor Support 308 309config CPU_SUBTYPE_SH7705 310 bool "Support SH7705 processor" 311 select CPU_SH3 312 313config CPU_SUBTYPE_SH7706 314 bool "Support SH7706 processor" 315 select CPU_SH3 316 help 317 Select SH7706 if you have a 133 Mhz SH-3 HD6417706 CPU. 318 319config CPU_SUBTYPE_SH7707 320 bool "Support SH7707 processor" 321 select CPU_SH3 322 help 323 Select SH7707 if you have a 60 Mhz SH-3 HD6417707 CPU. 324 325config CPU_SUBTYPE_SH7708 326 bool "Support SH7708 processor" 327 select CPU_SH3 328 help 329 Select SH7708 if you have a 60 Mhz SH-3 HD6417708S or 330 if you have a 100 Mhz SH-3 HD6417708R CPU. 331 332config CPU_SUBTYPE_SH7709 333 bool "Support SH7709 processor" 334 select CPU_SH3 335 help 336 Select SH7709 if you have a 80 Mhz SH-3 HD6417709 CPU. 337 338config CPU_SUBTYPE_SH7710 339 bool "Support SH7710 processor" 340 select CPU_SH3 341 select CPU_HAS_DSP 342 help 343 Select SH7710 if you have a SH3-DSP SH7710 CPU. 344 345config CPU_SUBTYPE_SH7712 346 bool "Support SH7712 processor" 347 select CPU_SH3 348 select CPU_HAS_DSP 349 help 350 Select SH7712 if you have a SH3-DSP SH7712 CPU. 351 352config CPU_SUBTYPE_SH7720 353 bool "Support SH7720 processor" 354 select CPU_SH3 355 select CPU_HAS_DSP 356 select SYS_SUPPORTS_CMT 357 select ARCH_WANT_OPTIONAL_GPIOLIB 358 select USB_ARCH_HAS_OHCI 359 select USB_OHCI_SH if USB_OHCI_HCD 360 help 361 Select SH7720 if you have a SH3-DSP SH7720 CPU. 362 363config CPU_SUBTYPE_SH7721 364 bool "Support SH7721 processor" 365 select CPU_SH3 366 select CPU_HAS_DSP 367 select SYS_SUPPORTS_CMT 368 select USB_ARCH_HAS_OHCI 369 select USB_OHCI_SH if USB_OHCI_HCD 370 help 371 Select SH7721 if you have a SH3-DSP SH7721 CPU. 372 373# SH-4 Processor Support 374 375config CPU_SUBTYPE_SH7750 376 bool "Support SH7750 processor" 377 select CPU_SH4 378 help 379 Select SH7750 if you have a 200 Mhz SH-4 HD6417750 CPU. 380 381config CPU_SUBTYPE_SH7091 382 bool "Support SH7091 processor" 383 select CPU_SH4 384 help 385 Select SH7091 if you have an SH-4 based Sega device (such as 386 the Dreamcast, Naomi, and Naomi 2). 387 388config CPU_SUBTYPE_SH7750R 389 bool "Support SH7750R processor" 390 select CPU_SH4 391 392config CPU_SUBTYPE_SH7750S 393 bool "Support SH7750S processor" 394 select CPU_SH4 395 396config CPU_SUBTYPE_SH7751 397 bool "Support SH7751 processor" 398 select CPU_SH4 399 help 400 Select SH7751 if you have a 166 Mhz SH-4 HD6417751 CPU, 401 or if you have a HD6417751R CPU. 402 403config CPU_SUBTYPE_SH7751R 404 bool "Support SH7751R processor" 405 select CPU_SH4 406 407config CPU_SUBTYPE_SH7760 408 bool "Support SH7760 processor" 409 select CPU_SH4 410 411config CPU_SUBTYPE_SH4_202 412 bool "Support SH4-202 processor" 413 select CPU_SH4 414 415# SH-4A Processor Support 416 417config CPU_SUBTYPE_SH7723 418 bool "Support SH7723 processor" 419 select CPU_SH4A 420 select CPU_SHX2 421 select ARCH_SHMOBILE 422 select ARCH_SPARSEMEM_ENABLE 423 select SYS_SUPPORTS_CMT 424 select ARCH_WANT_OPTIONAL_GPIOLIB 425 help 426 Select SH7723 if you have an SH-MobileR2 CPU. 427 428config CPU_SUBTYPE_SH7724 429 bool "Support SH7724 processor" 430 select CPU_SH4A 431 select CPU_SHX2 432 select ARCH_SHMOBILE 433 select ARCH_SPARSEMEM_ENABLE 434 select SYS_SUPPORTS_CMT 435 select ARCH_WANT_OPTIONAL_GPIOLIB 436 help 437 Select SH7724 if you have an SH-MobileR2R CPU. 438 439config CPU_SUBTYPE_SH7734 440 bool "Support SH7734 processor" 441 select CPU_SH4A 442 select CPU_SHX2 443 select ARCH_WANT_OPTIONAL_GPIOLIB 444 select USB_ARCH_HAS_OHCI 445 select USB_ARCH_HAS_EHCI 446 help 447 Select SH7734 if you have a SH4A SH7734 CPU. 448 449config CPU_SUBTYPE_SH7757 450 bool "Support SH7757 processor" 451 select CPU_SH4A 452 select CPU_SHX2 453 select ARCH_WANT_OPTIONAL_GPIOLIB 454 select USB_ARCH_HAS_OHCI 455 select USB_ARCH_HAS_EHCI 456 help 457 Select SH7757 if you have a SH4A SH7757 CPU. 458 459config CPU_SUBTYPE_SH7763 460 bool "Support SH7763 processor" 461 select CPU_SH4A 462 select USB_ARCH_HAS_OHCI 463 select USB_OHCI_SH if USB_OHCI_HCD 464 help 465 Select SH7763 if you have a SH4A SH7763(R5S77631) CPU. 466 467config CPU_SUBTYPE_SH7770 468 bool "Support SH7770 processor" 469 select CPU_SH4A 470 471config CPU_SUBTYPE_SH7780 472 bool "Support SH7780 processor" 473 select CPU_SH4A 474 475config CPU_SUBTYPE_SH7785 476 bool "Support SH7785 processor" 477 select CPU_SH4A 478 select CPU_SHX2 479 select ARCH_SPARSEMEM_ENABLE 480 select SYS_SUPPORTS_NUMA 481 select ARCH_WANT_OPTIONAL_GPIOLIB 482 483config CPU_SUBTYPE_SH7786 484 bool "Support SH7786 processor" 485 select CPU_SH4A 486 select CPU_SHX3 487 select CPU_HAS_PTEAEX 488 select GENERIC_CLOCKEVENTS_BROADCAST if SMP 489 select ARCH_WANT_OPTIONAL_GPIOLIB 490 select USB_ARCH_HAS_OHCI 491 select USB_OHCI_SH if USB_OHCI_HCD 492 select USB_ARCH_HAS_EHCI 493 select USB_EHCI_SH if USB_EHCI_HCD 494 495config CPU_SUBTYPE_SHX3 496 bool "Support SH-X3 processor" 497 select CPU_SH4A 498 select CPU_SHX3 499 select GENERIC_CLOCKEVENTS_BROADCAST if SMP 500 select ARCH_REQUIRE_GPIOLIB 501 502# SH4AL-DSP Processor Support 503 504config CPU_SUBTYPE_SH7343 505 bool "Support SH7343 processor" 506 select CPU_SH4AL_DSP 507 select ARCH_SHMOBILE 508 select SYS_SUPPORTS_CMT 509 510config CPU_SUBTYPE_SH7722 511 bool "Support SH7722 processor" 512 select CPU_SH4AL_DSP 513 select CPU_SHX2 514 select ARCH_SHMOBILE 515 select ARCH_SPARSEMEM_ENABLE 516 select SYS_SUPPORTS_NUMA 517 select SYS_SUPPORTS_CMT 518 select ARCH_WANT_OPTIONAL_GPIOLIB 519 520config CPU_SUBTYPE_SH7366 521 bool "Support SH7366 processor" 522 select CPU_SH4AL_DSP 523 select CPU_SHX2 524 select ARCH_SHMOBILE 525 select ARCH_SPARSEMEM_ENABLE 526 select SYS_SUPPORTS_NUMA 527 select SYS_SUPPORTS_CMT 528 529endchoice 530 531endif 532 533if SUPERH64 534 535choice 536 prompt "Processor sub-type selection" 537 538# SH-5 Processor Support 539 540config CPU_SUBTYPE_SH5_101 541 bool "Support SH5-101 processor" 542 select CPU_SH5 543 544config CPU_SUBTYPE_SH5_103 545 bool "Support SH5-103 processor" 546 select CPU_SH5 547 548endchoice 549 550endif 551 552source "arch/sh/mm/Kconfig" 553 554source "arch/sh/Kconfig.cpu" 555 556source "arch/sh/boards/Kconfig" 557 558menu "Timer and clock configuration" 559 560config SH_TIMER_TMU 561 bool "TMU timer driver" 562 depends on SYS_SUPPORTS_TMU 563 default y 564 help 565 This enables the build of the TMU timer driver. 566 567config SH_TIMER_CMT 568 bool "CMT timer driver" 569 depends on SYS_SUPPORTS_CMT 570 default y 571 help 572 This enables build of the CMT timer driver. 573 574config SH_TIMER_MTU2 575 bool "MTU2 timer driver" 576 depends on SYS_SUPPORTS_MTU2 577 default y 578 help 579 This enables build of the MTU2 timer driver. 580 581config SH_PCLK_FREQ 582 int "Peripheral clock frequency (in Hz)" 583 depends on SH_CLK_CPG_LEGACY 584 default "31250000" if CPU_SUBTYPE_SH7619 585 default "33333333" if CPU_SUBTYPE_SH7770 || \ 586 CPU_SUBTYPE_SH7760 || \ 587 CPU_SUBTYPE_SH7705 || \ 588 CPU_SUBTYPE_SH7203 || \ 589 CPU_SUBTYPE_SH7206 || \ 590 CPU_SUBTYPE_SH7263 || \ 591 CPU_SUBTYPE_MXG 592 default "60000000" if CPU_SUBTYPE_SH7751 || CPU_SUBTYPE_SH7751R 593 default "66000000" if CPU_SUBTYPE_SH4_202 594 default "50000000" 595 help 596 This option is used to specify the peripheral clock frequency. 597 This is necessary for determining the reference clock value on 598 platforms lacking an RTC. 599 600config SH_CLK_CPG 601 def_bool y 602 603config SH_CLK_CPG_LEGACY 604 depends on SH_CLK_CPG 605 def_bool y if !CPU_SUBTYPE_SH7785 && !ARCH_SHMOBILE && \ 606 !CPU_SHX3 && !CPU_SUBTYPE_SH7757 && \ 607 !CPU_SUBTYPE_SH7734 && !CPU_SUBTYPE_SH7264 && \ 608 !CPU_SUBTYPE_SH7269 609 610endmenu 611 612menu "CPU Frequency scaling" 613 614source "drivers/cpufreq/Kconfig" 615 616config SH_CPU_FREQ 617 tristate "SuperH CPU Frequency driver" 618 depends on CPU_FREQ 619 select CPU_FREQ_TABLE 620 help 621 This adds the cpufreq driver for SuperH. Any CPU that supports 622 clock rate rounding through the clock framework can use this 623 driver. While it will make the kernel slightly larger, this is 624 harmless for CPUs that don't support rate rounding. The driver 625 will also generate a notice in the boot log before disabling 626 itself if the CPU in question is not capable of rate rounding. 627 628 For details, take a look at <file:Documentation/cpu-freq>. 629 630 If unsure, say N. 631 632endmenu 633 634source "arch/sh/drivers/Kconfig" 635 636endmenu 637 638menu "Kernel features" 639 640source kernel/Kconfig.hz 641 642config KEXEC 643 bool "kexec system call (EXPERIMENTAL)" 644 depends on SUPERH32 && EXPERIMENTAL && MMU 645 help 646 kexec is a system call that implements the ability to shutdown your 647 current kernel, and to start another kernel. It is like a reboot 648 but it is independent of the system firmware. And like a reboot 649 you can start any kernel with it, not just Linux. 650 651 The name comes from the similarity to the exec system call. 652 653 It is an ongoing process to be certain the hardware in a machine 654 is properly shutdown, so do not be surprised if this code does not 655 initially work for you. It may help to enable device hotplugging 656 support. As of this writing the exact hardware interface is 657 strongly in flux, so no good recommendation can be made. 658 659config CRASH_DUMP 660 bool "kernel crash dumps (EXPERIMENTAL)" 661 depends on SUPERH32 && EXPERIMENTAL && BROKEN_ON_SMP 662 help 663 Generate crash dump after being started by kexec. 664 This should be normally only set in special crash dump kernels 665 which are loaded in the main kernel with kexec-tools into 666 a specially reserved region and then later executed after 667 a crash by kdump/kexec. The crash dump kernel must be compiled 668 to a memory address not used by the main kernel using 669 PHYSICAL_START. 670 671 For more details see Documentation/kdump/kdump.txt 672 673config KEXEC_JUMP 674 bool "kexec jump (EXPERIMENTAL)" 675 depends on SUPERH32 && KEXEC && HIBERNATION && EXPERIMENTAL 676 help 677 Jump between original kernel and kexeced kernel and invoke 678 code via KEXEC 679 680config PHYSICAL_START 681 hex "Physical address where the kernel is loaded" if (EXPERT || CRASH_DUMP) 682 default MEMORY_START 683 ---help--- 684 This gives the physical address where the kernel is loaded 685 and is ordinarily the same as MEMORY_START. 686 687 Different values are primarily used in the case of kexec on panic 688 where the fail safe kernel needs to run at a different address 689 than the panic-ed kernel. 690 691config SECCOMP 692 bool "Enable seccomp to safely compute untrusted bytecode" 693 depends on PROC_FS 694 help 695 This kernel feature is useful for number crunching applications 696 that may need to compute untrusted bytecode during their 697 execution. By using pipes or other transports made available to 698 the process as file descriptors supporting the read/write 699 syscalls, it's possible to isolate those applications in 700 their own address space using seccomp. Once seccomp is 701 enabled via prctl, it cannot be disabled and the task is only 702 allowed to execute a few safe syscalls defined by each seccomp 703 mode. 704 705 If unsure, say N. 706 707config CC_STACKPROTECTOR 708 bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)" 709 depends on SUPERH32 && EXPERIMENTAL 710 help 711 This option turns on the -fstack-protector GCC feature. This 712 feature puts, at the beginning of functions, a canary value on 713 the stack just before the return address, and validates 714 the value just before actually returning. Stack based buffer 715 overflows (that need to overwrite this return address) now also 716 overwrite the canary, which gets detected and the attack is then 717 neutralized via a kernel panic. 718 719 This feature requires gcc version 4.2 or above. 720 721config SMP 722 bool "Symmetric multi-processing support" 723 depends on SYS_SUPPORTS_SMP 724 select USE_GENERIC_SMP_HELPERS 725 ---help--- 726 This enables support for systems with more than one CPU. If you have 727 a system with only one CPU, like most personal computers, say N. If 728 you have a system with more than one CPU, say Y. 729 730 If you say N here, the kernel will run on single and multiprocessor 731 machines, but will use only one CPU of a multiprocessor machine. If 732 you say Y here, the kernel will run on many, but not all, 733 singleprocessor machines. On a singleprocessor machine, the kernel 734 will run faster if you say N here. 735 736 People using multiprocessor machines who say Y here should also say 737 Y to "Enhanced Real Time Clock Support", below. 738 739 See also <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO 740 available at <http://www.tldp.org/docs.html#howto>. 741 742 If you don't know what to do here, say N. 743 744config NR_CPUS 745 int "Maximum number of CPUs (2-32)" 746 range 2 32 747 depends on SMP 748 default "4" if CPU_SUBTYPE_SHX3 749 default "2" 750 help 751 This allows you to specify the maximum number of CPUs which this 752 kernel will support. The maximum supported value is 32 and the 753 minimum value which makes sense is 2. 754 755 This is purely to save memory - each supported CPU adds 756 approximately eight kilobytes to the kernel image. 757 758config HOTPLUG_CPU 759 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)" 760 depends on SMP && HOTPLUG && EXPERIMENTAL 761 help 762 Say Y here to experiment with turning CPUs off and on. CPUs 763 can be controlled through /sys/devices/system/cpu. 764 765source "kernel/Kconfig.preempt" 766 767config GUSA 768 def_bool y 769 depends on !SMP && SUPERH32 770 help 771 This enables support for gUSA (general UserSpace Atomicity). 772 This is the default implementation for both UP and non-ll/sc 773 CPUs, and is used by the libc, amongst others. 774 775 For additional information, design information can be found 776 in <http://lc.linux.or.jp/lc2002/papers/niibe0919p.pdf>. 777 778 This should only be disabled for special cases where alternate 779 atomicity implementations exist. 780 781config GUSA_RB 782 bool "Implement atomic operations by roll-back (gRB) (EXPERIMENTAL)" 783 depends on GUSA && CPU_SH3 || (CPU_SH4 && !CPU_SH4A) 784 help 785 Enabling this option will allow the kernel to implement some 786 atomic operations using a software implementation of load-locked/ 787 store-conditional (LLSC). On machines which do not have hardware 788 LLSC, this should be more efficient than the other alternative of 789 disabling interrupts around the atomic sequence. 790 791config HW_PERF_EVENTS 792 bool "Enable hardware performance counter support for perf events" 793 depends on PERF_EVENTS && CPU_HAS_PMU 794 default y 795 help 796 Enable hardware performance counter support for perf events. If 797 disabled, perf events will use software events only. 798 799source "drivers/sh/Kconfig" 800 801endmenu 802 803menu "Boot options" 804 805config ZERO_PAGE_OFFSET 806 hex 807 default "0x00010000" if PAGE_SIZE_64KB || SH_RTS7751R2D || \ 808 SH_7751_SOLUTION_ENGINE 809 default "0x00004000" if PAGE_SIZE_16KB || SH_SH03 810 default "0x00002000" if PAGE_SIZE_8KB 811 default "0x00001000" 812 help 813 This sets the default offset of zero page. 814 815config BOOT_LINK_OFFSET 816 hex 817 default "0x00210000" if SH_SHMIN 818 default "0x00400000" if SH_CAYMAN 819 default "0x00810000" if SH_7780_SOLUTION_ENGINE 820 default "0x009e0000" if SH_TITAN 821 default "0x01800000" if SH_SDK7780 822 default "0x02000000" if SH_EDOSK7760 823 default "0x00800000" 824 help 825 This option allows you to set the link address offset of the zImage. 826 This can be useful if you are on a board which has a small amount of 827 memory. 828 829config ENTRY_OFFSET 830 hex 831 default "0x00001000" if PAGE_SIZE_4KB 832 default "0x00002000" if PAGE_SIZE_8KB 833 default "0x00004000" if PAGE_SIZE_16KB 834 default "0x00010000" if PAGE_SIZE_64KB 835 default "0x00000000" 836 837config ROMIMAGE_MMCIF 838 bool "Include MMCIF loader in romImage (EXPERIMENTAL)" 839 depends on CPU_SUBTYPE_SH7724 && EXPERIMENTAL 840 help 841 Say Y here to include experimental MMCIF loading code in 842 romImage. With this enabled it is possible to write the romImage 843 kernel image to an MMC card and boot the kernel straight from 844 the reset vector. At reset the processor Mask ROM will load the 845 first part of the romImage which in turn loads the rest the kernel 846 image to RAM using the MMCIF hardware block. 847 848choice 849 prompt "Kernel command line" 850 optional 851 default CMDLINE_OVERWRITE 852 help 853 Setting this option allows the kernel command line arguments 854 to be set. 855 856config CMDLINE_OVERWRITE 857 bool "Overwrite bootloader kernel arguments" 858 help 859 Given string will overwrite any arguments passed in by 860 a bootloader. 861 862config CMDLINE_EXTEND 863 bool "Extend bootloader kernel arguments" 864 help 865 Given string will be concatenated with arguments passed in 866 by a bootloader. 867 868endchoice 869 870config CMDLINE 871 string "Kernel command line arguments string" 872 depends on CMDLINE_OVERWRITE || CMDLINE_EXTEND 873 default "console=ttySC1,115200" 874 875endmenu 876 877menu "Bus options" 878 879config SUPERHYWAY 880 tristate "SuperHyway Bus support" 881 depends on CPU_SUBTYPE_SH4_202 882 883config MAPLE 884 bool "Maple Bus support" 885 depends on SH_DREAMCAST 886 help 887 The Maple Bus is SEGA's serial communication bus for peripherals 888 on the Dreamcast. Without this bus support you won't be able to 889 get your Dreamcast keyboard etc to work, so most users 890 probably want to say 'Y' here, unless you are only using the 891 Dreamcast with a serial line terminal or a remote network 892 connection. 893 894config PCI 895 bool "PCI support" 896 depends on SYS_SUPPORTS_PCI 897 select PCI_DOMAINS 898 select GENERIC_PCI_IOMAP 899 select NO_GENERIC_PCI_IOPORT_MAP 900 help 901 Find out whether you have a PCI motherboard. PCI is the name of a 902 bus system, i.e. the way the CPU talks to the other stuff inside 903 your box. If you have PCI, say Y, otherwise N. 904 905config PCI_DOMAINS 906 bool 907 908source "drivers/pci/pcie/Kconfig" 909 910source "drivers/pci/Kconfig" 911 912source "drivers/pcmcia/Kconfig" 913 914source "drivers/pci/hotplug/Kconfig" 915 916endmenu 917 918menu "Executable file formats" 919 920source "fs/Kconfig.binfmt" 921 922endmenu 923 924menu "Power management options (EXPERIMENTAL)" 925depends on EXPERIMENTAL 926 927source "kernel/power/Kconfig" 928 929source "drivers/cpuidle/Kconfig" 930 931endmenu 932 933source "net/Kconfig" 934 935source "drivers/Kconfig" 936 937source "fs/Kconfig" 938 939source "arch/sh/Kconfig.debug" 940 941source "security/Kconfig" 942 943source "crypto/Kconfig" 944 945source "lib/Kconfig" 946