1# SPDX-License-Identifier: GPL-2.0 2config SUPERH 3 def_bool y 4 select ARCH_HAS_PTE_SPECIAL 5 select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST 6 select ARCH_MIGHT_HAVE_PC_PARPORT 7 select ARCH_NO_COHERENT_DMA_MMAP if !MMU 8 select HAVE_PATA_PLATFORM 9 select CLKDEV_LOOKUP 10 select HAVE_IDE if HAS_IOPORT_MAP 11 select HAVE_MEMBLOCK 12 select HAVE_MEMBLOCK_NODE_MAP 13 select NO_BOOTMEM 14 select ARCH_DISCARD_MEMBLOCK 15 select HAVE_OPROFILE 16 select HAVE_GENERIC_DMA_COHERENT 17 select HAVE_ARCH_TRACEHOOK 18 select HAVE_PERF_EVENTS 19 select HAVE_DEBUG_BUGVERBOSE 20 select ARCH_HAVE_CUSTOM_GPIO_H 21 select ARCH_HAVE_NMI_SAFE_CMPXCHG if (GUSA_RB || CPU_SH4A) 22 select ARCH_HAS_GCOV_PROFILE_ALL 23 select PERF_USE_VMALLOC 24 select HAVE_DEBUG_KMEMLEAK 25 select HAVE_KERNEL_GZIP 26 select CPU_NO_EFFICIENT_FFS 27 select HAVE_KERNEL_BZIP2 28 select HAVE_KERNEL_LZMA 29 select HAVE_KERNEL_XZ 30 select HAVE_KERNEL_LZO 31 select HAVE_UID16 32 select ARCH_WANT_IPC_PARSE_VERSION 33 select HAVE_SYSCALL_TRACEPOINTS 34 select HAVE_REGS_AND_STACK_ACCESS_API 35 select MAY_HAVE_SPARSE_IRQ 36 select IRQ_FORCED_THREADING 37 select RTC_LIB 38 select GENERIC_ATOMIC64 39 select GENERIC_IRQ_SHOW 40 select GENERIC_SMP_IDLE_THREAD 41 select GENERIC_IDLE_POLL_SETUP 42 select GENERIC_CLOCKEVENTS 43 select GENERIC_CMOS_UPDATE if SH_SH03 || SH_DREAMCAST 44 select GENERIC_SCHED_CLOCK 45 select GENERIC_STRNCPY_FROM_USER 46 select GENERIC_STRNLEN_USER 47 select HAVE_MOD_ARCH_SPECIFIC if DWARF_UNWINDER 48 select MODULES_USE_ELF_RELA 49 select OLD_SIGSUSPEND 50 select OLD_SIGACTION 51 select HAVE_ARCH_AUDITSYSCALL 52 select HAVE_FUTEX_CMPXCHG if FUTEX 53 select HAVE_NMI 54 select NEED_SG_DMA_LENGTH 55 56 help 57 The SuperH is a RISC processor targeted for use in embedded systems 58 and consumer electronics; it was also used in the Sega Dreamcast 59 gaming console. The SuperH port has a home page at 60 <http://www.linux-sh.org/>. 61 62config SUPERH32 63 def_bool "$(ARCH)" = "sh" 64 select HAVE_KPROBES 65 select HAVE_KRETPROBES 66 select HAVE_IOREMAP_PROT if MMU && !X2TLB 67 select HAVE_FUNCTION_TRACER 68 select HAVE_FTRACE_MCOUNT_RECORD 69 select HAVE_DYNAMIC_FTRACE 70 select HAVE_FTRACE_NMI_ENTER if DYNAMIC_FTRACE 71 select ARCH_WANT_IPC_PARSE_VERSION 72 select HAVE_FUNCTION_GRAPH_TRACER 73 select HAVE_ARCH_KGDB 74 select HAVE_HW_BREAKPOINT 75 select HAVE_MIXED_BREAKPOINTS_REGS 76 select PERF_EVENTS 77 select ARCH_HIBERNATION_POSSIBLE if MMU 78 select SPARSE_IRQ 79 select HAVE_STACKPROTECTOR 80 81config SUPERH64 82 def_bool "$(ARCH)" = "sh64" 83 select HAVE_EXIT_THREAD 84 select KALLSYMS 85 86config ARCH_DEFCONFIG 87 string 88 default "arch/sh/configs/shx3_defconfig" if SUPERH32 89 default "arch/sh/configs/cayman_defconfig" if SUPERH64 90 91config RWSEM_GENERIC_SPINLOCK 92 def_bool y 93 94config RWSEM_XCHGADD_ALGORITHM 95 bool 96 97config GENERIC_BUG 98 def_bool y 99 depends on BUG && SUPERH32 100 101config GENERIC_CSUM 102 def_bool y 103 depends on SUPERH64 104 105config GENERIC_HWEIGHT 106 def_bool y 107 108config GENERIC_CALIBRATE_DELAY 109 bool 110 111config GENERIC_LOCKBREAK 112 def_bool y 113 depends on SMP && PREEMPT 114 115config ARCH_SUSPEND_POSSIBLE 116 def_bool n 117 118config ARCH_HIBERNATION_POSSIBLE 119 def_bool n 120 121config SYS_SUPPORTS_APM_EMULATION 122 bool 123 select ARCH_SUSPEND_POSSIBLE 124 125config SYS_SUPPORTS_HUGETLBFS 126 bool 127 128config SYS_SUPPORTS_SMP 129 bool 130 131config SYS_SUPPORTS_NUMA 132 bool 133 134config SYS_SUPPORTS_PCI 135 bool 136 137config STACKTRACE_SUPPORT 138 def_bool y 139 140config LOCKDEP_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 NO_IOPORT_MAP 150 def_bool !PCI 151 depends on !SH_CAYMAN && !SH_SH4202_MICRODEV && !SH_SHMIN && \ 152 !SH_HP6XX && !SH_SOLUTION_ENGINE 153 154config IO_TRAPPED 155 bool 156 157config SWAP_IO_SPACE 158 bool 159 160config DMA_COHERENT 161 select DMA_DIRECT_OPS 162 bool 163 164config DMA_NONCOHERENT 165 def_bool !DMA_COHERENT 166 select ARCH_HAS_SYNC_DMA_FOR_DEVICE 167 select DMA_NONCOHERENT_OPS 168 169config PGTABLE_LEVELS 170 default 3 if X2TLB 171 default 2 172 173menu "System type" 174 175# 176# Processor families 177# 178config CPU_SH2 179 bool 180 select SH_INTC 181 182config CPU_SH2A 183 bool 184 select CPU_SH2 185 select UNCACHED_MAPPING 186 187config CPU_J2 188 bool 189 select CPU_SH2 190 select OF 191 select OF_EARLY_FLATTREE 192 193config CPU_SH3 194 bool 195 select CPU_HAS_INTEVT 196 select CPU_HAS_SR_RB 197 select SH_INTC 198 select SYS_SUPPORTS_SH_TMU 199 200config CPU_SH4 201 bool 202 select CPU_HAS_INTEVT 203 select CPU_HAS_SR_RB 204 select CPU_HAS_FPU if !CPU_SH4AL_DSP 205 select SH_INTC 206 select SYS_SUPPORTS_SH_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_SH_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 238config CPU_HAS_PMU 239 depends on CPU_SH4 || CPU_SH4A 240 default y 241 bool 242 243if SUPERH32 244 245choice 246 prompt "Processor sub-type selection" 247 248# 249# Processor subtypes 250# 251 252# SH-2 Processor Support 253 254config CPU_SUBTYPE_SH7619 255 bool "Support SH7619 processor" 256 select CPU_SH2 257 select SYS_SUPPORTS_SH_CMT 258 259config CPU_SUBTYPE_J2 260 bool "Support J2 processor" 261 select CPU_J2 262 select SYS_SUPPORTS_SMP 263 select GENERIC_CLOCKEVENTS_BROADCAST if SMP 264 265# SH-2A Processor Support 266 267config CPU_SUBTYPE_SH7201 268 bool "Support SH7201 processor" 269 select CPU_SH2A 270 select CPU_HAS_FPU 271 select SYS_SUPPORTS_SH_MTU2 272 273config CPU_SUBTYPE_SH7203 274 bool "Support SH7203 processor" 275 select CPU_SH2A 276 select CPU_HAS_FPU 277 select SYS_SUPPORTS_SH_CMT 278 select SYS_SUPPORTS_SH_MTU2 279 select PINCTRL 280 281config CPU_SUBTYPE_SH7206 282 bool "Support SH7206 processor" 283 select CPU_SH2A 284 select SYS_SUPPORTS_SH_CMT 285 select SYS_SUPPORTS_SH_MTU2 286 287config CPU_SUBTYPE_SH7263 288 bool "Support SH7263 processor" 289 select CPU_SH2A 290 select CPU_HAS_FPU 291 select SYS_SUPPORTS_SH_CMT 292 select SYS_SUPPORTS_SH_MTU2 293 294config CPU_SUBTYPE_SH7264 295 bool "Support SH7264 processor" 296 select CPU_SH2A 297 select CPU_HAS_FPU 298 select SYS_SUPPORTS_SH_CMT 299 select SYS_SUPPORTS_SH_MTU2 300 select PINCTRL 301 302config CPU_SUBTYPE_SH7269 303 bool "Support SH7269 processor" 304 select CPU_SH2A 305 select CPU_HAS_FPU 306 select SYS_SUPPORTS_SH_CMT 307 select SYS_SUPPORTS_SH_MTU2 308 select PINCTRL 309 310config CPU_SUBTYPE_MXG 311 bool "Support MX-G processor" 312 select CPU_SH2A 313 select SYS_SUPPORTS_SH_MTU2 314 help 315 Select MX-G if running on an R8A03022BG part. 316 317# SH-3 Processor Support 318 319config CPU_SUBTYPE_SH7705 320 bool "Support SH7705 processor" 321 select CPU_SH3 322 323config CPU_SUBTYPE_SH7706 324 bool "Support SH7706 processor" 325 select CPU_SH3 326 help 327 Select SH7706 if you have a 133 Mhz SH-3 HD6417706 CPU. 328 329config CPU_SUBTYPE_SH7707 330 bool "Support SH7707 processor" 331 select CPU_SH3 332 help 333 Select SH7707 if you have a 60 Mhz SH-3 HD6417707 CPU. 334 335config CPU_SUBTYPE_SH7708 336 bool "Support SH7708 processor" 337 select CPU_SH3 338 help 339 Select SH7708 if you have a 60 Mhz SH-3 HD6417708S or 340 if you have a 100 Mhz SH-3 HD6417708R CPU. 341 342config CPU_SUBTYPE_SH7709 343 bool "Support SH7709 processor" 344 select CPU_SH3 345 help 346 Select SH7709 if you have a 80 Mhz SH-3 HD6417709 CPU. 347 348config CPU_SUBTYPE_SH7710 349 bool "Support SH7710 processor" 350 select CPU_SH3 351 select CPU_HAS_DSP 352 help 353 Select SH7710 if you have a SH3-DSP SH7710 CPU. 354 355config CPU_SUBTYPE_SH7712 356 bool "Support SH7712 processor" 357 select CPU_SH3 358 select CPU_HAS_DSP 359 help 360 Select SH7712 if you have a SH3-DSP SH7712 CPU. 361 362config CPU_SUBTYPE_SH7720 363 bool "Support SH7720 processor" 364 select CPU_SH3 365 select CPU_HAS_DSP 366 select SYS_SUPPORTS_SH_CMT 367 select USB_OHCI_SH if USB_OHCI_HCD 368 select PINCTRL 369 help 370 Select SH7720 if you have a SH3-DSP SH7720 CPU. 371 372config CPU_SUBTYPE_SH7721 373 bool "Support SH7721 processor" 374 select CPU_SH3 375 select CPU_HAS_DSP 376 select SYS_SUPPORTS_SH_CMT 377 select USB_OHCI_SH if USB_OHCI_HCD 378 help 379 Select SH7721 if you have a SH3-DSP SH7721 CPU. 380 381# SH-4 Processor Support 382 383config CPU_SUBTYPE_SH7750 384 bool "Support SH7750 processor" 385 select CPU_SH4 386 help 387 Select SH7750 if you have a 200 Mhz SH-4 HD6417750 CPU. 388 389config CPU_SUBTYPE_SH7091 390 bool "Support SH7091 processor" 391 select CPU_SH4 392 help 393 Select SH7091 if you have an SH-4 based Sega device (such as 394 the Dreamcast, Naomi, and Naomi 2). 395 396config CPU_SUBTYPE_SH7750R 397 bool "Support SH7750R processor" 398 select CPU_SH4 399 400config CPU_SUBTYPE_SH7750S 401 bool "Support SH7750S processor" 402 select CPU_SH4 403 404config CPU_SUBTYPE_SH7751 405 bool "Support SH7751 processor" 406 select CPU_SH4 407 help 408 Select SH7751 if you have a 166 Mhz SH-4 HD6417751 CPU, 409 or if you have a HD6417751R CPU. 410 411config CPU_SUBTYPE_SH7751R 412 bool "Support SH7751R processor" 413 select CPU_SH4 414 415config CPU_SUBTYPE_SH7760 416 bool "Support SH7760 processor" 417 select CPU_SH4 418 419config CPU_SUBTYPE_SH4_202 420 bool "Support SH4-202 processor" 421 select CPU_SH4 422 423# SH-4A Processor Support 424 425config CPU_SUBTYPE_SH7723 426 bool "Support SH7723 processor" 427 select CPU_SH4A 428 select CPU_SHX2 429 select ARCH_SHMOBILE 430 select ARCH_SPARSEMEM_ENABLE 431 select SYS_SUPPORTS_SH_CMT 432 select PINCTRL 433 help 434 Select SH7723 if you have an SH-MobileR2 CPU. 435 436config CPU_SUBTYPE_SH7724 437 bool "Support SH7724 processor" 438 select CPU_SH4A 439 select CPU_SHX2 440 select ARCH_SHMOBILE 441 select ARCH_SPARSEMEM_ENABLE 442 select SYS_SUPPORTS_SH_CMT 443 select PINCTRL 444 help 445 Select SH7724 if you have an SH-MobileR2R CPU. 446 447config CPU_SUBTYPE_SH7734 448 bool "Support SH7734 processor" 449 select CPU_SH4A 450 select CPU_SHX2 451 select PINCTRL 452 help 453 Select SH7734 if you have a SH4A SH7734 CPU. 454 455config CPU_SUBTYPE_SH7757 456 bool "Support SH7757 processor" 457 select CPU_SH4A 458 select CPU_SHX2 459 select PINCTRL 460 help 461 Select SH7757 if you have a SH4A SH7757 CPU. 462 463config CPU_SUBTYPE_SH7763 464 bool "Support SH7763 processor" 465 select CPU_SH4A 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 PINCTRL 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 USB_OHCI_SH if USB_OHCI_HCD 493 select USB_EHCI_SH if USB_EHCI_HCD 494 select PINCTRL 495 496config CPU_SUBTYPE_SHX3 497 bool "Support SH-X3 processor" 498 select CPU_SH4A 499 select CPU_SHX3 500 select GENERIC_CLOCKEVENTS_BROADCAST if SMP 501 select GPIOLIB 502 select PINCTRL 503 504# SH4AL-DSP Processor Support 505 506config CPU_SUBTYPE_SH7343 507 bool "Support SH7343 processor" 508 select CPU_SH4AL_DSP 509 select ARCH_SHMOBILE 510 select SYS_SUPPORTS_SH_CMT 511 512config CPU_SUBTYPE_SH7722 513 bool "Support SH7722 processor" 514 select CPU_SH4AL_DSP 515 select CPU_SHX2 516 select ARCH_SHMOBILE 517 select ARCH_SPARSEMEM_ENABLE 518 select SYS_SUPPORTS_NUMA 519 select SYS_SUPPORTS_SH_CMT 520 select PINCTRL 521 522config CPU_SUBTYPE_SH7366 523 bool "Support SH7366 processor" 524 select CPU_SH4AL_DSP 525 select CPU_SHX2 526 select ARCH_SHMOBILE 527 select ARCH_SPARSEMEM_ENABLE 528 select SYS_SUPPORTS_NUMA 529 select SYS_SUPPORTS_SH_CMT 530 531endchoice 532 533endif 534 535if SUPERH64 536 537choice 538 prompt "Processor sub-type selection" 539 540# SH-5 Processor Support 541 542config CPU_SUBTYPE_SH5_101 543 bool "Support SH5-101 processor" 544 select CPU_SH5 545 546config CPU_SUBTYPE_SH5_103 547 bool "Support SH5-103 processor" 548 select CPU_SH5 549 550endchoice 551 552endif 553 554source "arch/sh/mm/Kconfig" 555 556source "arch/sh/Kconfig.cpu" 557 558source "arch/sh/boards/Kconfig" 559 560menu "Timer and clock configuration" 561 562config SH_PCLK_FREQ 563 int "Peripheral clock frequency (in Hz)" 564 depends on SH_CLK_CPG_LEGACY 565 default "31250000" if CPU_SUBTYPE_SH7619 566 default "33333333" if CPU_SUBTYPE_SH7770 || \ 567 CPU_SUBTYPE_SH7760 || \ 568 CPU_SUBTYPE_SH7705 || \ 569 CPU_SUBTYPE_SH7203 || \ 570 CPU_SUBTYPE_SH7206 || \ 571 CPU_SUBTYPE_SH7263 || \ 572 CPU_SUBTYPE_MXG 573 default "60000000" if CPU_SUBTYPE_SH7751 || CPU_SUBTYPE_SH7751R 574 default "66000000" if CPU_SUBTYPE_SH4_202 575 default "50000000" 576 help 577 This option is used to specify the peripheral clock frequency. 578 This is necessary for determining the reference clock value on 579 platforms lacking an RTC. 580 581config SH_CLK_CPG 582 def_bool y 583 584config SH_CLK_CPG_LEGACY 585 depends on SH_CLK_CPG 586 def_bool y if !CPU_SUBTYPE_SH7785 && !ARCH_SHMOBILE && \ 587 !CPU_SHX3 && !CPU_SUBTYPE_SH7757 && \ 588 !CPU_SUBTYPE_SH7734 && !CPU_SUBTYPE_SH7264 && \ 589 !CPU_SUBTYPE_SH7269 590 591endmenu 592 593menu "CPU Frequency scaling" 594source "drivers/cpufreq/Kconfig" 595endmenu 596 597source "arch/sh/drivers/Kconfig" 598 599endmenu 600 601menu "Kernel features" 602 603source kernel/Kconfig.hz 604 605config KEXEC 606 bool "kexec system call (EXPERIMENTAL)" 607 depends on SUPERH32 && MMU 608 select KEXEC_CORE 609 help 610 kexec is a system call that implements the ability to shutdown your 611 current kernel, and to start another kernel. It is like a reboot 612 but it is independent of the system firmware. And like a reboot 613 you can start any kernel with it, not just Linux. 614 615 The name comes from the similarity to the exec system call. 616 617 It is an ongoing process to be certain the hardware in a machine 618 is properly shutdown, so do not be surprised if this code does not 619 initially work for you. As of this writing the exact hardware 620 interface is strongly in flux, so no good recommendation can be 621 made. 622 623config CRASH_DUMP 624 bool "kernel crash dumps (EXPERIMENTAL)" 625 depends on SUPERH32 && BROKEN_ON_SMP 626 help 627 Generate crash dump after being started by kexec. 628 This should be normally only set in special crash dump kernels 629 which are loaded in the main kernel with kexec-tools into 630 a specially reserved region and then later executed after 631 a crash by kdump/kexec. The crash dump kernel must be compiled 632 to a memory address not used by the main kernel using 633 PHYSICAL_START. 634 635 For more details see Documentation/kdump/kdump.txt 636 637config KEXEC_JUMP 638 bool "kexec jump (EXPERIMENTAL)" 639 depends on SUPERH32 && KEXEC && HIBERNATION 640 help 641 Jump between original kernel and kexeced kernel and invoke 642 code via KEXEC 643 644config PHYSICAL_START 645 hex "Physical address where the kernel is loaded" if (EXPERT || CRASH_DUMP) 646 default MEMORY_START 647 ---help--- 648 This gives the physical address where the kernel is loaded 649 and is ordinarily the same as MEMORY_START. 650 651 Different values are primarily used in the case of kexec on panic 652 where the fail safe kernel needs to run at a different address 653 than the panic-ed kernel. 654 655config SECCOMP 656 bool "Enable seccomp to safely compute untrusted bytecode" 657 depends on PROC_FS 658 help 659 This kernel feature is useful for number crunching applications 660 that may need to compute untrusted bytecode during their 661 execution. By using pipes or other transports made available to 662 the process as file descriptors supporting the read/write 663 syscalls, it's possible to isolate those applications in 664 their own address space using seccomp. Once seccomp is 665 enabled via prctl, it cannot be disabled and the task is only 666 allowed to execute a few safe syscalls defined by each seccomp 667 mode. 668 669 If unsure, say N. 670 671config SMP 672 bool "Symmetric multi-processing support" 673 depends on SYS_SUPPORTS_SMP 674 ---help--- 675 This enables support for systems with more than one CPU. If you have 676 a system with only one CPU, say N. If you have a system with more 677 than one CPU, say Y. 678 679 If you say N here, the kernel will run on uni- and multiprocessor 680 machines, but will use only one CPU of a multiprocessor machine. If 681 you say Y here, the kernel will run on many, but not all, 682 uniprocessor machines. On a uniprocessor machine, the kernel 683 will run faster if you say N here. 684 685 People using multiprocessor machines who say Y here should also say 686 Y to "Enhanced Real Time Clock Support", below. 687 688 See also <file:Documentation/lockup-watchdogs.txt> and the SMP-HOWTO 689 available at <http://www.tldp.org/docs.html#howto>. 690 691 If you don't know what to do here, say N. 692 693config NR_CPUS 694 int "Maximum number of CPUs (2-32)" 695 range 2 32 696 depends on SMP 697 default "4" if CPU_SUBTYPE_SHX3 698 default "2" 699 help 700 This allows you to specify the maximum number of CPUs which this 701 kernel will support. The maximum supported value is 32 and the 702 minimum value which makes sense is 2. 703 704 This is purely to save memory - each supported CPU adds 705 approximately eight kilobytes to the kernel image. 706 707config HOTPLUG_CPU 708 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)" 709 depends on SMP 710 help 711 Say Y here to experiment with turning CPUs off and on. CPUs 712 can be controlled through /sys/devices/system/cpu. 713 714config GUSA 715 def_bool y 716 depends on !SMP && SUPERH32 717 help 718 This enables support for gUSA (general UserSpace Atomicity). 719 This is the default implementation for both UP and non-ll/sc 720 CPUs, and is used by the libc, amongst others. 721 722 For additional information, design information can be found 723 in <http://lc.linux.or.jp/lc2002/papers/niibe0919p.pdf>. 724 725 This should only be disabled for special cases where alternate 726 atomicity implementations exist. 727 728config GUSA_RB 729 bool "Implement atomic operations by roll-back (gRB) (EXPERIMENTAL)" 730 depends on GUSA && CPU_SH3 || (CPU_SH4 && !CPU_SH4A) 731 help 732 Enabling this option will allow the kernel to implement some 733 atomic operations using a software implementation of load-locked/ 734 store-conditional (LLSC). On machines which do not have hardware 735 LLSC, this should be more efficient than the other alternative of 736 disabling interrupts around the atomic sequence. 737 738config HW_PERF_EVENTS 739 bool "Enable hardware performance counter support for perf events" 740 depends on PERF_EVENTS && CPU_HAS_PMU 741 default y 742 help 743 Enable hardware performance counter support for perf events. If 744 disabled, perf events will use software events only. 745 746source "drivers/sh/Kconfig" 747 748endmenu 749 750menu "Boot options" 751 752config USE_BUILTIN_DTB 753 bool "Use builtin DTB" 754 default n 755 depends on SH_DEVICE_TREE 756 help 757 Link a device tree blob for particular hardware into the kernel, 758 suppressing use of the DTB pointer provided by the bootloader. 759 This option should only be used with legacy bootloaders that are 760 not capable of providing a DTB to the kernel, or for experimental 761 hardware without stable device tree bindings. 762 763config BUILTIN_DTB_SOURCE 764 string "Source file for builtin DTB" 765 default "" 766 depends on USE_BUILTIN_DTB 767 help 768 Base name (without suffix, relative to arch/sh/boot/dts) for the 769 a DTS file that will be used to produce the DTB linked into the 770 kernel. 771 772config ZERO_PAGE_OFFSET 773 hex 774 default "0x00010000" if PAGE_SIZE_64KB || SH_RTS7751R2D || \ 775 SH_7751_SOLUTION_ENGINE 776 default "0x00004000" if PAGE_SIZE_16KB || SH_SH03 777 default "0x00002000" if PAGE_SIZE_8KB 778 default "0x00001000" 779 help 780 This sets the default offset of zero page. 781 782config BOOT_LINK_OFFSET 783 hex 784 default "0x00210000" if SH_SHMIN 785 default "0x00400000" if SH_CAYMAN 786 default "0x00810000" if SH_7780_SOLUTION_ENGINE 787 default "0x009e0000" if SH_TITAN 788 default "0x01800000" if SH_SDK7780 789 default "0x02000000" if SH_EDOSK7760 790 default "0x00800000" 791 help 792 This option allows you to set the link address offset of the zImage. 793 This can be useful if you are on a board which has a small amount of 794 memory. 795 796config ENTRY_OFFSET 797 hex 798 default "0x00001000" if PAGE_SIZE_4KB 799 default "0x00002000" if PAGE_SIZE_8KB 800 default "0x00004000" if PAGE_SIZE_16KB 801 default "0x00010000" if PAGE_SIZE_64KB 802 default "0x00000000" 803 804config ROMIMAGE_MMCIF 805 bool "Include MMCIF loader in romImage (EXPERIMENTAL)" 806 depends on CPU_SUBTYPE_SH7724 807 help 808 Say Y here to include experimental MMCIF loading code in 809 romImage. With this enabled it is possible to write the romImage 810 kernel image to an MMC card and boot the kernel straight from 811 the reset vector. At reset the processor Mask ROM will load the 812 first part of the romImage which in turn loads the rest the kernel 813 image to RAM using the MMCIF hardware block. 814 815choice 816 prompt "Kernel command line" 817 optional 818 default CMDLINE_OVERWRITE 819 help 820 Setting this option allows the kernel command line arguments 821 to be set. 822 823config CMDLINE_OVERWRITE 824 bool "Overwrite bootloader kernel arguments" 825 help 826 Given string will overwrite any arguments passed in by 827 a bootloader. 828 829config CMDLINE_EXTEND 830 bool "Extend bootloader kernel arguments" 831 help 832 Given string will be concatenated with arguments passed in 833 by a bootloader. 834 835endchoice 836 837config CMDLINE 838 string "Kernel command line arguments string" 839 depends on CMDLINE_OVERWRITE || CMDLINE_EXTEND 840 default "console=ttySC1,115200" 841 842endmenu 843 844menu "Bus options" 845 846config SUPERHYWAY 847 tristate "SuperHyway Bus support" 848 depends on CPU_SUBTYPE_SH4_202 849 850config MAPLE 851 bool "Maple Bus support" 852 depends on SH_DREAMCAST 853 help 854 The Maple Bus is SEGA's serial communication bus for peripherals 855 on the Dreamcast. Without this bus support you won't be able to 856 get your Dreamcast keyboard etc to work, so most users 857 probably want to say 'Y' here, unless you are only using the 858 Dreamcast with a serial line terminal or a remote network 859 connection. 860 861config PCI 862 bool "PCI support" 863 depends on SYS_SUPPORTS_PCI 864 select PCI_DOMAINS 865 select GENERIC_PCI_IOMAP 866 select NO_GENERIC_PCI_IOPORT_MAP 867 help 868 Find out whether you have a PCI motherboard. PCI is the name of a 869 bus system, i.e. the way the CPU talks to the other stuff inside 870 your box. If you have PCI, say Y, otherwise N. 871 872config PCI_DOMAINS 873 bool 874 875source "drivers/pci/Kconfig" 876 877source "drivers/pcmcia/Kconfig" 878 879endmenu 880 881menu "Power management options (EXPERIMENTAL)" 882 883source "kernel/power/Kconfig" 884 885source "drivers/cpuidle/Kconfig" 886 887endmenu 888