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