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_PERF_EVENTS 15 select HAVE_DEBUG_BUGVERBOSE 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_DEBUG_KMEMLEAK 20 select HAVE_KERNEL_GZIP 21 select HAVE_KERNEL_BZIP2 22 select HAVE_KERNEL_LZMA 23 select HAVE_KERNEL_XZ 24 select HAVE_KERNEL_LZO 25 select HAVE_UID16 26 select ARCH_WANT_IPC_PARSE_VERSION 27 select HAVE_SYSCALL_TRACEPOINTS 28 select HAVE_REGS_AND_STACK_ACCESS_API 29 select HAVE_GENERIC_HARDIRQS 30 select MAY_HAVE_SPARSE_IRQ 31 select IRQ_FORCED_THREADING 32 select RTC_LIB 33 select GENERIC_ATOMIC64 34 select GENERIC_IRQ_SHOW 35 select GENERIC_SMP_IDLE_THREAD 36 select GENERIC_CLOCKEVENTS 37 select GENERIC_CMOS_UPDATE if SH_SH03 || SH_DREAMCAST 38 select GENERIC_STRNCPY_FROM_USER 39 select GENERIC_STRNLEN_USER 40 select HAVE_MOD_ARCH_SPECIFIC if DWARF_UNWINDER 41 select MODULES_USE_ELF_RELA 42 help 43 The SuperH is a RISC processor targeted for use in embedded systems 44 and consumer electronics; it was also used in the Sega Dreamcast 45 gaming console. The SuperH port has a home page at 46 <http://www.linux-sh.org/>. 47 48config SUPERH32 49 def_bool ARCH = "sh" 50 select HAVE_KPROBES 51 select HAVE_KRETPROBES 52 select HAVE_IOREMAP_PROT if MMU && !X2TLB 53 select HAVE_FUNCTION_TRACER 54 select HAVE_FTRACE_MCOUNT_RECORD 55 select HAVE_DYNAMIC_FTRACE 56 select HAVE_FUNCTION_TRACE_MCOUNT_TEST 57 select HAVE_FTRACE_NMI_ENTER if DYNAMIC_FTRACE 58 select ARCH_WANT_IPC_PARSE_VERSION 59 select HAVE_FUNCTION_GRAPH_TRACER 60 select HAVE_ARCH_KGDB 61 select HAVE_HW_BREAKPOINT 62 select HAVE_MIXED_BREAKPOINTS_REGS 63 select PERF_EVENTS 64 select ARCH_HIBERNATION_POSSIBLE if MMU 65 select SPARSE_IRQ 66 67config SUPERH64 68 def_bool ARCH = "sh64" 69 select KALLSYMS 70 71config ARCH_DEFCONFIG 72 string 73 default "arch/sh/configs/shx3_defconfig" if SUPERH32 74 default "arch/sh/configs/cayman_defconfig" if SUPERH64 75 76config RWSEM_GENERIC_SPINLOCK 77 def_bool y 78 79config RWSEM_XCHGADD_ALGORITHM 80 bool 81 82config GENERIC_BUG 83 def_bool y 84 depends on BUG && SUPERH32 85 86config GENERIC_CSUM 87 def_bool y 88 depends on SUPERH64 89 90config GENERIC_HWEIGHT 91 def_bool y 92 93config GENERIC_GPIO 94 def_bool n 95 96config GENERIC_CALIBRATE_DELAY 97 bool 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 NO_IOPORT 156 def_bool !PCI 157 depends on !SH_CAYMAN && !SH_SH4202_MICRODEV && !SH_SHMIN && \ 158 !SH_HP6XX && !SH_SOLUTION_ENGINE 159 160config IO_TRAPPED 161 bool 162 163config SWAP_IO_SPACE 164 bool 165 166config DMA_COHERENT 167 bool 168 169config DMA_NONCOHERENT 170 def_bool !DMA_COHERENT 171 172config NEED_DMA_MAP_STATE 173 def_bool DMA_NONCOHERENT 174 175config NEED_SG_DMA_LENGTH 176 def_bool y 177 178source "init/Kconfig" 179 180source "kernel/Kconfig.freezer" 181 182menu "System type" 183 184# 185# Processor families 186# 187config CPU_SH2 188 bool 189 190config CPU_SH2A 191 bool 192 select CPU_SH2 193 select UNCACHED_MAPPING 194 195config CPU_SH3 196 bool 197 select CPU_HAS_INTEVT 198 select CPU_HAS_SR_RB 199 select SYS_SUPPORTS_TMU 200 201config CPU_SH4 202 bool 203 select CPU_HAS_INTEVT 204 select CPU_HAS_SR_RB 205 select CPU_HAS_FPU if !CPU_SH4AL_DSP 206 select SYS_SUPPORTS_TMU 207 select SYS_SUPPORTS_HUGETLBFS if MMU 208 209config CPU_SH4A 210 bool 211 select CPU_SH4 212 213config CPU_SH4AL_DSP 214 bool 215 select CPU_SH4A 216 select CPU_HAS_DSP 217 218config CPU_SH5 219 bool 220 select CPU_HAS_FPU 221 select SYS_SUPPORTS_TMU 222 select SYS_SUPPORTS_HUGETLBFS if MMU 223 224config CPU_SHX2 225 bool 226 227config CPU_SHX3 228 bool 229 select DMA_COHERENT 230 select SYS_SUPPORTS_SMP 231 select SYS_SUPPORTS_NUMA 232 233config ARCH_SHMOBILE 234 bool 235 select ARCH_SUSPEND_POSSIBLE 236 select PM 237 select PM_RUNTIME 238 239config CPU_HAS_PMU 240 depends on CPU_SH4 || CPU_SH4A 241 default y 242 bool 243 244if SUPERH32 245 246choice 247 prompt "Processor sub-type selection" 248 249# 250# Processor subtypes 251# 252 253# SH-2 Processor Support 254 255config CPU_SUBTYPE_SH7619 256 bool "Support SH7619 processor" 257 select CPU_SH2 258 select SYS_SUPPORTS_CMT 259 260# SH-2A Processor Support 261 262config CPU_SUBTYPE_SH7201 263 bool "Support SH7201 processor" 264 select CPU_SH2A 265 select CPU_HAS_FPU 266 select SYS_SUPPORTS_MTU2 267 268config CPU_SUBTYPE_SH7203 269 bool "Support SH7203 processor" 270 select CPU_SH2A 271 select CPU_HAS_FPU 272 select SYS_SUPPORTS_CMT 273 select SYS_SUPPORTS_MTU2 274 select ARCH_WANT_OPTIONAL_GPIOLIB 275 276config CPU_SUBTYPE_SH7206 277 bool "Support SH7206 processor" 278 select CPU_SH2A 279 select SYS_SUPPORTS_CMT 280 select SYS_SUPPORTS_MTU2 281 282config CPU_SUBTYPE_SH7263 283 bool "Support SH7263 processor" 284 select CPU_SH2A 285 select CPU_HAS_FPU 286 select SYS_SUPPORTS_CMT 287 select SYS_SUPPORTS_MTU2 288 289config CPU_SUBTYPE_SH7264 290 bool "Support SH7264 processor" 291 select CPU_SH2A 292 select CPU_HAS_FPU 293 select SYS_SUPPORTS_CMT 294 select SYS_SUPPORTS_MTU2 295 296config CPU_SUBTYPE_SH7269 297 bool "Support SH7269 processor" 298 select CPU_SH2A 299 select CPU_HAS_FPU 300 select SYS_SUPPORTS_CMT 301 select SYS_SUPPORTS_MTU2 302 303config CPU_SUBTYPE_MXG 304 bool "Support MX-G processor" 305 select CPU_SH2A 306 select SYS_SUPPORTS_MTU2 307 help 308 Select MX-G if running on an R8A03022BG part. 309 310# SH-3 Processor Support 311 312config CPU_SUBTYPE_SH7705 313 bool "Support SH7705 processor" 314 select CPU_SH3 315 316config CPU_SUBTYPE_SH7706 317 bool "Support SH7706 processor" 318 select CPU_SH3 319 help 320 Select SH7706 if you have a 133 Mhz SH-3 HD6417706 CPU. 321 322config CPU_SUBTYPE_SH7707 323 bool "Support SH7707 processor" 324 select CPU_SH3 325 help 326 Select SH7707 if you have a 60 Mhz SH-3 HD6417707 CPU. 327 328config CPU_SUBTYPE_SH7708 329 bool "Support SH7708 processor" 330 select CPU_SH3 331 help 332 Select SH7708 if you have a 60 Mhz SH-3 HD6417708S or 333 if you have a 100 Mhz SH-3 HD6417708R CPU. 334 335config CPU_SUBTYPE_SH7709 336 bool "Support SH7709 processor" 337 select CPU_SH3 338 help 339 Select SH7709 if you have a 80 Mhz SH-3 HD6417709 CPU. 340 341config CPU_SUBTYPE_SH7710 342 bool "Support SH7710 processor" 343 select CPU_SH3 344 select CPU_HAS_DSP 345 help 346 Select SH7710 if you have a SH3-DSP SH7710 CPU. 347 348config CPU_SUBTYPE_SH7712 349 bool "Support SH7712 processor" 350 select CPU_SH3 351 select CPU_HAS_DSP 352 help 353 Select SH7712 if you have a SH3-DSP SH7712 CPU. 354 355config CPU_SUBTYPE_SH7720 356 bool "Support SH7720 processor" 357 select CPU_SH3 358 select CPU_HAS_DSP 359 select SYS_SUPPORTS_CMT 360 select ARCH_WANT_OPTIONAL_GPIOLIB 361 select USB_ARCH_HAS_OHCI 362 select USB_OHCI_SH if USB_OHCI_HCD 363 help 364 Select SH7720 if you have a SH3-DSP SH7720 CPU. 365 366config CPU_SUBTYPE_SH7721 367 bool "Support SH7721 processor" 368 select CPU_SH3 369 select CPU_HAS_DSP 370 select SYS_SUPPORTS_CMT 371 select USB_ARCH_HAS_OHCI 372 select USB_OHCI_SH if USB_OHCI_HCD 373 help 374 Select SH7721 if you have a SH3-DSP SH7721 CPU. 375 376# SH-4 Processor Support 377 378config CPU_SUBTYPE_SH7750 379 bool "Support SH7750 processor" 380 select CPU_SH4 381 help 382 Select SH7750 if you have a 200 Mhz SH-4 HD6417750 CPU. 383 384config CPU_SUBTYPE_SH7091 385 bool "Support SH7091 processor" 386 select CPU_SH4 387 help 388 Select SH7091 if you have an SH-4 based Sega device (such as 389 the Dreamcast, Naomi, and Naomi 2). 390 391config CPU_SUBTYPE_SH7750R 392 bool "Support SH7750R processor" 393 select CPU_SH4 394 395config CPU_SUBTYPE_SH7750S 396 bool "Support SH7750S processor" 397 select CPU_SH4 398 399config CPU_SUBTYPE_SH7751 400 bool "Support SH7751 processor" 401 select CPU_SH4 402 help 403 Select SH7751 if you have a 166 Mhz SH-4 HD6417751 CPU, 404 or if you have a HD6417751R CPU. 405 406config CPU_SUBTYPE_SH7751R 407 bool "Support SH7751R processor" 408 select CPU_SH4 409 410config CPU_SUBTYPE_SH7760 411 bool "Support SH7760 processor" 412 select CPU_SH4 413 414config CPU_SUBTYPE_SH4_202 415 bool "Support SH4-202 processor" 416 select CPU_SH4 417 418# SH-4A Processor Support 419 420config CPU_SUBTYPE_SH7723 421 bool "Support SH7723 processor" 422 select CPU_SH4A 423 select CPU_SHX2 424 select ARCH_SHMOBILE 425 select ARCH_SPARSEMEM_ENABLE 426 select SYS_SUPPORTS_CMT 427 select ARCH_WANT_OPTIONAL_GPIOLIB 428 help 429 Select SH7723 if you have an SH-MobileR2 CPU. 430 431config CPU_SUBTYPE_SH7724 432 bool "Support SH7724 processor" 433 select CPU_SH4A 434 select CPU_SHX2 435 select ARCH_SHMOBILE 436 select ARCH_SPARSEMEM_ENABLE 437 select SYS_SUPPORTS_CMT 438 select ARCH_WANT_OPTIONAL_GPIOLIB 439 help 440 Select SH7724 if you have an SH-MobileR2R CPU. 441 442config CPU_SUBTYPE_SH7734 443 bool "Support SH7734 processor" 444 select CPU_SH4A 445 select CPU_SHX2 446 select ARCH_WANT_OPTIONAL_GPIOLIB 447 select USB_ARCH_HAS_OHCI 448 select USB_ARCH_HAS_EHCI 449 help 450 Select SH7734 if you have a SH4A SH7734 CPU. 451 452config CPU_SUBTYPE_SH7757 453 bool "Support SH7757 processor" 454 select CPU_SH4A 455 select CPU_SHX2 456 select ARCH_WANT_OPTIONAL_GPIOLIB 457 select USB_ARCH_HAS_OHCI 458 select USB_ARCH_HAS_EHCI 459 help 460 Select SH7757 if you have a SH4A SH7757 CPU. 461 462config CPU_SUBTYPE_SH7763 463 bool "Support SH7763 processor" 464 select CPU_SH4A 465 select USB_ARCH_HAS_OHCI 466 select USB_OHCI_SH if USB_OHCI_HCD 467 help 468 Select SH7763 if you have a SH4A SH7763(R5S77631) CPU. 469 470config CPU_SUBTYPE_SH7770 471 bool "Support SH7770 processor" 472 select CPU_SH4A 473 474config CPU_SUBTYPE_SH7780 475 bool "Support SH7780 processor" 476 select CPU_SH4A 477 478config CPU_SUBTYPE_SH7785 479 bool "Support SH7785 processor" 480 select CPU_SH4A 481 select CPU_SHX2 482 select ARCH_SPARSEMEM_ENABLE 483 select SYS_SUPPORTS_NUMA 484 select ARCH_WANT_OPTIONAL_GPIOLIB 485 486config CPU_SUBTYPE_SH7786 487 bool "Support SH7786 processor" 488 select CPU_SH4A 489 select CPU_SHX3 490 select CPU_HAS_PTEAEX 491 select GENERIC_CLOCKEVENTS_BROADCAST if SMP 492 select ARCH_WANT_OPTIONAL_GPIOLIB 493 select USB_ARCH_HAS_OHCI 494 select USB_OHCI_SH if USB_OHCI_HCD 495 select USB_ARCH_HAS_EHCI 496 select USB_EHCI_SH if USB_EHCI_HCD 497 498config CPU_SUBTYPE_SHX3 499 bool "Support SH-X3 processor" 500 select CPU_SH4A 501 select CPU_SHX3 502 select GENERIC_CLOCKEVENTS_BROADCAST if SMP 503 select ARCH_REQUIRE_GPIOLIB 504 505# SH4AL-DSP Processor Support 506 507config CPU_SUBTYPE_SH7343 508 bool "Support SH7343 processor" 509 select CPU_SH4AL_DSP 510 select ARCH_SHMOBILE 511 select SYS_SUPPORTS_CMT 512 513config CPU_SUBTYPE_SH7722 514 bool "Support SH7722 processor" 515 select CPU_SH4AL_DSP 516 select CPU_SHX2 517 select ARCH_SHMOBILE 518 select ARCH_SPARSEMEM_ENABLE 519 select SYS_SUPPORTS_NUMA 520 select SYS_SUPPORTS_CMT 521 select ARCH_WANT_OPTIONAL_GPIOLIB 522 523config CPU_SUBTYPE_SH7366 524 bool "Support SH7366 processor" 525 select CPU_SH4AL_DSP 526 select CPU_SHX2 527 select ARCH_SHMOBILE 528 select ARCH_SPARSEMEM_ENABLE 529 select SYS_SUPPORTS_NUMA 530 select SYS_SUPPORTS_CMT 531 532endchoice 533 534endif 535 536if SUPERH64 537 538choice 539 prompt "Processor sub-type selection" 540 541# SH-5 Processor Support 542 543config CPU_SUBTYPE_SH5_101 544 bool "Support SH5-101 processor" 545 select CPU_SH5 546 547config CPU_SUBTYPE_SH5_103 548 bool "Support SH5-103 processor" 549 select CPU_SH5 550 551endchoice 552 553endif 554 555source "arch/sh/mm/Kconfig" 556 557source "arch/sh/Kconfig.cpu" 558 559source "arch/sh/boards/Kconfig" 560 561menu "Timer and clock configuration" 562 563config SH_TIMER_TMU 564 bool "TMU timer driver" 565 depends on SYS_SUPPORTS_TMU 566 default y 567 help 568 This enables the build of the TMU timer driver. 569 570config SH_TIMER_CMT 571 bool "CMT timer driver" 572 depends on SYS_SUPPORTS_CMT 573 default y 574 help 575 This enables build of the CMT timer driver. 576 577config SH_TIMER_MTU2 578 bool "MTU2 timer driver" 579 depends on SYS_SUPPORTS_MTU2 580 default y 581 help 582 This enables build of the MTU2 timer driver. 583 584config SH_PCLK_FREQ 585 int "Peripheral clock frequency (in Hz)" 586 depends on SH_CLK_CPG_LEGACY 587 default "31250000" if CPU_SUBTYPE_SH7619 588 default "33333333" if CPU_SUBTYPE_SH7770 || \ 589 CPU_SUBTYPE_SH7760 || \ 590 CPU_SUBTYPE_SH7705 || \ 591 CPU_SUBTYPE_SH7203 || \ 592 CPU_SUBTYPE_SH7206 || \ 593 CPU_SUBTYPE_SH7263 || \ 594 CPU_SUBTYPE_MXG 595 default "60000000" if CPU_SUBTYPE_SH7751 || CPU_SUBTYPE_SH7751R 596 default "66000000" if CPU_SUBTYPE_SH4_202 597 default "50000000" 598 help 599 This option is used to specify the peripheral clock frequency. 600 This is necessary for determining the reference clock value on 601 platforms lacking an RTC. 602 603config SH_CLK_CPG 604 def_bool y 605 606config SH_CLK_CPG_LEGACY 607 depends on SH_CLK_CPG 608 def_bool y if !CPU_SUBTYPE_SH7785 && !ARCH_SHMOBILE && \ 609 !CPU_SHX3 && !CPU_SUBTYPE_SH7757 && \ 610 !CPU_SUBTYPE_SH7734 && !CPU_SUBTYPE_SH7264 && \ 611 !CPU_SUBTYPE_SH7269 612 613endmenu 614 615menu "CPU Frequency scaling" 616 617source "drivers/cpufreq/Kconfig" 618 619config SH_CPU_FREQ 620 tristate "SuperH CPU Frequency driver" 621 depends on CPU_FREQ 622 select CPU_FREQ_TABLE 623 help 624 This adds the cpufreq driver for SuperH. Any CPU that supports 625 clock rate rounding through the clock framework can use this 626 driver. While it will make the kernel slightly larger, this is 627 harmless for CPUs that don't support rate rounding. The driver 628 will also generate a notice in the boot log before disabling 629 itself if the CPU in question is not capable of rate rounding. 630 631 For details, take a look at <file:Documentation/cpu-freq>. 632 633 If unsure, say N. 634 635endmenu 636 637source "arch/sh/drivers/Kconfig" 638 639endmenu 640 641menu "Kernel features" 642 643source kernel/Kconfig.hz 644 645config KEXEC 646 bool "kexec system call (EXPERIMENTAL)" 647 depends on SUPERH32 && EXPERIMENTAL && MMU 648 help 649 kexec is a system call that implements the ability to shutdown your 650 current kernel, and to start another kernel. It is like a reboot 651 but it is independent of the system firmware. And like a reboot 652 you can start any kernel with it, not just Linux. 653 654 The name comes from the similarity to the exec system call. 655 656 It is an ongoing process to be certain the hardware in a machine 657 is properly shutdown, so do not be surprised if this code does not 658 initially work for you. It may help to enable device hotplugging 659 support. As of this writing the exact hardware interface is 660 strongly in flux, so no good recommendation can be made. 661 662config CRASH_DUMP 663 bool "kernel crash dumps (EXPERIMENTAL)" 664 depends on SUPERH32 && EXPERIMENTAL && BROKEN_ON_SMP 665 help 666 Generate crash dump after being started by kexec. 667 This should be normally only set in special crash dump kernels 668 which are loaded in the main kernel with kexec-tools into 669 a specially reserved region and then later executed after 670 a crash by kdump/kexec. The crash dump kernel must be compiled 671 to a memory address not used by the main kernel using 672 PHYSICAL_START. 673 674 For more details see Documentation/kdump/kdump.txt 675 676config KEXEC_JUMP 677 bool "kexec jump (EXPERIMENTAL)" 678 depends on SUPERH32 && KEXEC && HIBERNATION && EXPERIMENTAL 679 help 680 Jump between original kernel and kexeced kernel and invoke 681 code via KEXEC 682 683config PHYSICAL_START 684 hex "Physical address where the kernel is loaded" if (EXPERT || CRASH_DUMP) 685 default MEMORY_START 686 ---help--- 687 This gives the physical address where the kernel is loaded 688 and is ordinarily the same as MEMORY_START. 689 690 Different values are primarily used in the case of kexec on panic 691 where the fail safe kernel needs to run at a different address 692 than the panic-ed kernel. 693 694config SECCOMP 695 bool "Enable seccomp to safely compute untrusted bytecode" 696 depends on PROC_FS 697 help 698 This kernel feature is useful for number crunching applications 699 that may need to compute untrusted bytecode during their 700 execution. By using pipes or other transports made available to 701 the process as file descriptors supporting the read/write 702 syscalls, it's possible to isolate those applications in 703 their own address space using seccomp. Once seccomp is 704 enabled via prctl, it cannot be disabled and the task is only 705 allowed to execute a few safe syscalls defined by each seccomp 706 mode. 707 708 If unsure, say N. 709 710config CC_STACKPROTECTOR 711 bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)" 712 depends on SUPERH32 && EXPERIMENTAL 713 help 714 This option turns on the -fstack-protector GCC feature. This 715 feature puts, at the beginning of functions, a canary value on 716 the stack just before the return address, and validates 717 the value just before actually returning. Stack based buffer 718 overflows (that need to overwrite this return address) now also 719 overwrite the canary, which gets detected and the attack is then 720 neutralized via a kernel panic. 721 722 This feature requires gcc version 4.2 or above. 723 724config SMP 725 bool "Symmetric multi-processing support" 726 depends on SYS_SUPPORTS_SMP 727 select USE_GENERIC_SMP_HELPERS 728 ---help--- 729 This enables support for systems with more than one CPU. If you have 730 a system with only one CPU, like most personal computers, say N. If 731 you have a system with more than one CPU, say Y. 732 733 If you say N here, the kernel will run on single and multiprocessor 734 machines, but will use only one CPU of a multiprocessor machine. If 735 you say Y here, the kernel will run on many, but not all, 736 singleprocessor machines. On a singleprocessor machine, the kernel 737 will run faster if you say N here. 738 739 People using multiprocessor machines who say Y here should also say 740 Y to "Enhanced Real Time Clock Support", below. 741 742 See also <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO 743 available at <http://www.tldp.org/docs.html#howto>. 744 745 If you don't know what to do here, say N. 746 747config NR_CPUS 748 int "Maximum number of CPUs (2-32)" 749 range 2 32 750 depends on SMP 751 default "4" if CPU_SUBTYPE_SHX3 752 default "2" 753 help 754 This allows you to specify the maximum number of CPUs which this 755 kernel will support. The maximum supported value is 32 and the 756 minimum value which makes sense is 2. 757 758 This is purely to save memory - each supported CPU adds 759 approximately eight kilobytes to the kernel image. 760 761config HOTPLUG_CPU 762 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)" 763 depends on SMP && HOTPLUG && EXPERIMENTAL 764 help 765 Say Y here to experiment with turning CPUs off and on. CPUs 766 can be controlled through /sys/devices/system/cpu. 767 768source "kernel/Kconfig.preempt" 769 770config GUSA 771 def_bool y 772 depends on !SMP && SUPERH32 773 help 774 This enables support for gUSA (general UserSpace Atomicity). 775 This is the default implementation for both UP and non-ll/sc 776 CPUs, and is used by the libc, amongst others. 777 778 For additional information, design information can be found 779 in <http://lc.linux.or.jp/lc2002/papers/niibe0919p.pdf>. 780 781 This should only be disabled for special cases where alternate 782 atomicity implementations exist. 783 784config GUSA_RB 785 bool "Implement atomic operations by roll-back (gRB) (EXPERIMENTAL)" 786 depends on GUSA && CPU_SH3 || (CPU_SH4 && !CPU_SH4A) 787 help 788 Enabling this option will allow the kernel to implement some 789 atomic operations using a software implementation of load-locked/ 790 store-conditional (LLSC). On machines which do not have hardware 791 LLSC, this should be more efficient than the other alternative of 792 disabling interrupts around the atomic sequence. 793 794config HW_PERF_EVENTS 795 bool "Enable hardware performance counter support for perf events" 796 depends on PERF_EVENTS && CPU_HAS_PMU 797 default y 798 help 799 Enable hardware performance counter support for perf events. If 800 disabled, perf events will use software events only. 801 802source "drivers/sh/Kconfig" 803 804endmenu 805 806menu "Boot options" 807 808config ZERO_PAGE_OFFSET 809 hex 810 default "0x00010000" if PAGE_SIZE_64KB || SH_RTS7751R2D || \ 811 SH_7751_SOLUTION_ENGINE 812 default "0x00004000" if PAGE_SIZE_16KB || SH_SH03 813 default "0x00002000" if PAGE_SIZE_8KB 814 default "0x00001000" 815 help 816 This sets the default offset of zero page. 817 818config BOOT_LINK_OFFSET 819 hex 820 default "0x00210000" if SH_SHMIN 821 default "0x00400000" if SH_CAYMAN 822 default "0x00810000" if SH_7780_SOLUTION_ENGINE 823 default "0x009e0000" if SH_TITAN 824 default "0x01800000" if SH_SDK7780 825 default "0x02000000" if SH_EDOSK7760 826 default "0x00800000" 827 help 828 This option allows you to set the link address offset of the zImage. 829 This can be useful if you are on a board which has a small amount of 830 memory. 831 832config ENTRY_OFFSET 833 hex 834 default "0x00001000" if PAGE_SIZE_4KB 835 default "0x00002000" if PAGE_SIZE_8KB 836 default "0x00004000" if PAGE_SIZE_16KB 837 default "0x00010000" if PAGE_SIZE_64KB 838 default "0x00000000" 839 840config ROMIMAGE_MMCIF 841 bool "Include MMCIF loader in romImage (EXPERIMENTAL)" 842 depends on CPU_SUBTYPE_SH7724 && EXPERIMENTAL 843 help 844 Say Y here to include experimental MMCIF loading code in 845 romImage. With this enabled it is possible to write the romImage 846 kernel image to an MMC card and boot the kernel straight from 847 the reset vector. At reset the processor Mask ROM will load the 848 first part of the romImage which in turn loads the rest the kernel 849 image to RAM using the MMCIF hardware block. 850 851choice 852 prompt "Kernel command line" 853 optional 854 default CMDLINE_OVERWRITE 855 help 856 Setting this option allows the kernel command line arguments 857 to be set. 858 859config CMDLINE_OVERWRITE 860 bool "Overwrite bootloader kernel arguments" 861 help 862 Given string will overwrite any arguments passed in by 863 a bootloader. 864 865config CMDLINE_EXTEND 866 bool "Extend bootloader kernel arguments" 867 help 868 Given string will be concatenated with arguments passed in 869 by a bootloader. 870 871endchoice 872 873config CMDLINE 874 string "Kernel command line arguments string" 875 depends on CMDLINE_OVERWRITE || CMDLINE_EXTEND 876 default "console=ttySC1,115200" 877 878endmenu 879 880menu "Bus options" 881 882config SUPERHYWAY 883 tristate "SuperHyway Bus support" 884 depends on CPU_SUBTYPE_SH4_202 885 886config MAPLE 887 bool "Maple Bus support" 888 depends on SH_DREAMCAST 889 help 890 The Maple Bus is SEGA's serial communication bus for peripherals 891 on the Dreamcast. Without this bus support you won't be able to 892 get your Dreamcast keyboard etc to work, so most users 893 probably want to say 'Y' here, unless you are only using the 894 Dreamcast with a serial line terminal or a remote network 895 connection. 896 897config PCI 898 bool "PCI support" 899 depends on SYS_SUPPORTS_PCI 900 select PCI_DOMAINS 901 select GENERIC_PCI_IOMAP 902 select NO_GENERIC_PCI_IOPORT_MAP 903 help 904 Find out whether you have a PCI motherboard. PCI is the name of a 905 bus system, i.e. the way the CPU talks to the other stuff inside 906 your box. If you have PCI, say Y, otherwise N. 907 908config PCI_DOMAINS 909 bool 910 911source "drivers/pci/pcie/Kconfig" 912 913source "drivers/pci/Kconfig" 914 915source "drivers/pcmcia/Kconfig" 916 917source "drivers/pci/hotplug/Kconfig" 918 919endmenu 920 921menu "Executable file formats" 922 923source "fs/Kconfig.binfmt" 924 925endmenu 926 927menu "Power management options (EXPERIMENTAL)" 928depends on EXPERIMENTAL 929 930source "kernel/power/Kconfig" 931 932source "drivers/cpuidle/Kconfig" 933 934endmenu 935 936source "net/Kconfig" 937 938source "drivers/Kconfig" 939 940source "fs/Kconfig" 941 942source "arch/sh/Kconfig.debug" 943 944source "security/Kconfig" 945 946source "crypto/Kconfig" 947 948source "lib/Kconfig" 949