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_DMA_MAP_STATE 55 select NEED_SG_DMA_LENGTH 56 57 help 58 The SuperH is a RISC processor targeted for use in embedded systems 59 and consumer electronics; it was also used in the Sega Dreamcast 60 gaming console. The SuperH port has a home page at 61 <http://www.linux-sh.org/>. 62 63config SUPERH32 64 def_bool "$(ARCH)" = "sh" 65 select HAVE_KPROBES 66 select HAVE_KRETPROBES 67 select HAVE_IOREMAP_PROT if MMU && !X2TLB 68 select HAVE_FUNCTION_TRACER 69 select HAVE_FTRACE_MCOUNT_RECORD 70 select HAVE_DYNAMIC_FTRACE 71 select HAVE_FTRACE_NMI_ENTER if DYNAMIC_FTRACE 72 select ARCH_WANT_IPC_PARSE_VERSION 73 select HAVE_FUNCTION_GRAPH_TRACER 74 select HAVE_ARCH_KGDB 75 select HAVE_HW_BREAKPOINT 76 select HAVE_MIXED_BREAKPOINTS_REGS 77 select PERF_EVENTS 78 select ARCH_HIBERNATION_POSSIBLE if MMU 79 select SPARSE_IRQ 80 select HAVE_STACKPROTECTOR 81 82config SUPERH64 83 def_bool "$(ARCH)" = "sh64" 84 select HAVE_EXIT_THREAD 85 select KALLSYMS 86 87config ARCH_DEFCONFIG 88 string 89 default "arch/sh/configs/shx3_defconfig" if SUPERH32 90 default "arch/sh/configs/cayman_defconfig" if SUPERH64 91 92config RWSEM_GENERIC_SPINLOCK 93 def_bool y 94 95config RWSEM_XCHGADD_ALGORITHM 96 bool 97 98config GENERIC_BUG 99 def_bool y 100 depends on BUG && SUPERH32 101 102config GENERIC_CSUM 103 def_bool y 104 depends on SUPERH64 105 106config GENERIC_HWEIGHT 107 def_bool y 108 109config GENERIC_CALIBRATE_DELAY 110 bool 111 112config GENERIC_LOCKBREAK 113 def_bool y 114 depends on SMP && PREEMPT 115 116config ARCH_SUSPEND_POSSIBLE 117 def_bool n 118 119config ARCH_HIBERNATION_POSSIBLE 120 def_bool n 121 122config SYS_SUPPORTS_APM_EMULATION 123 bool 124 select ARCH_SUSPEND_POSSIBLE 125 126config SYS_SUPPORTS_HUGETLBFS 127 bool 128 129config SYS_SUPPORTS_SMP 130 bool 131 132config SYS_SUPPORTS_NUMA 133 bool 134 135config SYS_SUPPORTS_PCI 136 bool 137 138config STACKTRACE_SUPPORT 139 def_bool y 140 141config LOCKDEP_SUPPORT 142 def_bool y 143 144config ARCH_HAS_ILOG2_U32 145 def_bool n 146 147config ARCH_HAS_ILOG2_U64 148 def_bool n 149 150config NO_IOPORT_MAP 151 def_bool !PCI 152 depends on !SH_CAYMAN && !SH_SH4202_MICRODEV && !SH_SHMIN && \ 153 !SH_HP6XX && !SH_SOLUTION_ENGINE 154 155config IO_TRAPPED 156 bool 157 158config SWAP_IO_SPACE 159 bool 160 161config DMA_COHERENT 162 bool 163 164config DMA_NONCOHERENT 165 def_bool !DMA_COHERENT 166 167config PGTABLE_LEVELS 168 default 3 if X2TLB 169 default 2 170 171menu "System type" 172 173# 174# Processor families 175# 176config CPU_SH2 177 bool 178 select SH_INTC 179 180config CPU_SH2A 181 bool 182 select CPU_SH2 183 select UNCACHED_MAPPING 184 185config CPU_J2 186 bool 187 select CPU_SH2 188 select OF 189 select OF_EARLY_FLATTREE 190 191config CPU_SH3 192 bool 193 select CPU_HAS_INTEVT 194 select CPU_HAS_SR_RB 195 select SH_INTC 196 select SYS_SUPPORTS_SH_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 SH_INTC 204 select SYS_SUPPORTS_SH_TMU 205 select SYS_SUPPORTS_HUGETLBFS if MMU 206 207config CPU_SH4A 208 bool 209 select CPU_SH4 210 211config CPU_SH4AL_DSP 212 bool 213 select CPU_SH4A 214 select CPU_HAS_DSP 215 216config CPU_SH5 217 bool 218 select CPU_HAS_FPU 219 select SYS_SUPPORTS_SH_TMU 220 select SYS_SUPPORTS_HUGETLBFS if MMU 221 222config CPU_SHX2 223 bool 224 225config CPU_SHX3 226 bool 227 select DMA_COHERENT 228 select SYS_SUPPORTS_SMP 229 select SYS_SUPPORTS_NUMA 230 231config ARCH_SHMOBILE 232 bool 233 select ARCH_SUSPEND_POSSIBLE 234 select PM 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_SH_CMT 256 257config CPU_SUBTYPE_J2 258 bool "Support J2 processor" 259 select CPU_J2 260 select SYS_SUPPORTS_SMP 261 select GENERIC_CLOCKEVENTS_BROADCAST if SMP 262 263# SH-2A Processor Support 264 265config CPU_SUBTYPE_SH7201 266 bool "Support SH7201 processor" 267 select CPU_SH2A 268 select CPU_HAS_FPU 269 select SYS_SUPPORTS_SH_MTU2 270 271config CPU_SUBTYPE_SH7203 272 bool "Support SH7203 processor" 273 select CPU_SH2A 274 select CPU_HAS_FPU 275 select SYS_SUPPORTS_SH_CMT 276 select SYS_SUPPORTS_SH_MTU2 277 select PINCTRL 278 279config CPU_SUBTYPE_SH7206 280 bool "Support SH7206 processor" 281 select CPU_SH2A 282 select SYS_SUPPORTS_SH_CMT 283 select SYS_SUPPORTS_SH_MTU2 284 285config CPU_SUBTYPE_SH7263 286 bool "Support SH7263 processor" 287 select CPU_SH2A 288 select CPU_HAS_FPU 289 select SYS_SUPPORTS_SH_CMT 290 select SYS_SUPPORTS_SH_MTU2 291 292config CPU_SUBTYPE_SH7264 293 bool "Support SH7264 processor" 294 select CPU_SH2A 295 select CPU_HAS_FPU 296 select SYS_SUPPORTS_SH_CMT 297 select SYS_SUPPORTS_SH_MTU2 298 select PINCTRL 299 300config CPU_SUBTYPE_SH7269 301 bool "Support SH7269 processor" 302 select CPU_SH2A 303 select CPU_HAS_FPU 304 select SYS_SUPPORTS_SH_CMT 305 select SYS_SUPPORTS_SH_MTU2 306 select PINCTRL 307 308config CPU_SUBTYPE_MXG 309 bool "Support MX-G processor" 310 select CPU_SH2A 311 select SYS_SUPPORTS_SH_MTU2 312 help 313 Select MX-G if running on an R8A03022BG part. 314 315# SH-3 Processor Support 316 317config CPU_SUBTYPE_SH7705 318 bool "Support SH7705 processor" 319 select CPU_SH3 320 321config CPU_SUBTYPE_SH7706 322 bool "Support SH7706 processor" 323 select CPU_SH3 324 help 325 Select SH7706 if you have a 133 Mhz SH-3 HD6417706 CPU. 326 327config CPU_SUBTYPE_SH7707 328 bool "Support SH7707 processor" 329 select CPU_SH3 330 help 331 Select SH7707 if you have a 60 Mhz SH-3 HD6417707 CPU. 332 333config CPU_SUBTYPE_SH7708 334 bool "Support SH7708 processor" 335 select CPU_SH3 336 help 337 Select SH7708 if you have a 60 Mhz SH-3 HD6417708S or 338 if you have a 100 Mhz SH-3 HD6417708R CPU. 339 340config CPU_SUBTYPE_SH7709 341 bool "Support SH7709 processor" 342 select CPU_SH3 343 help 344 Select SH7709 if you have a 80 Mhz SH-3 HD6417709 CPU. 345 346config CPU_SUBTYPE_SH7710 347 bool "Support SH7710 processor" 348 select CPU_SH3 349 select CPU_HAS_DSP 350 help 351 Select SH7710 if you have a SH3-DSP SH7710 CPU. 352 353config CPU_SUBTYPE_SH7712 354 bool "Support SH7712 processor" 355 select CPU_SH3 356 select CPU_HAS_DSP 357 help 358 Select SH7712 if you have a SH3-DSP SH7712 CPU. 359 360config CPU_SUBTYPE_SH7720 361 bool "Support SH7720 processor" 362 select CPU_SH3 363 select CPU_HAS_DSP 364 select SYS_SUPPORTS_SH_CMT 365 select USB_OHCI_SH if USB_OHCI_HCD 366 select PINCTRL 367 help 368 Select SH7720 if you have a SH3-DSP SH7720 CPU. 369 370config CPU_SUBTYPE_SH7721 371 bool "Support SH7721 processor" 372 select CPU_SH3 373 select CPU_HAS_DSP 374 select SYS_SUPPORTS_SH_CMT 375 select USB_OHCI_SH if USB_OHCI_HCD 376 help 377 Select SH7721 if you have a SH3-DSP SH7721 CPU. 378 379# SH-4 Processor Support 380 381config CPU_SUBTYPE_SH7750 382 bool "Support SH7750 processor" 383 select CPU_SH4 384 help 385 Select SH7750 if you have a 200 Mhz SH-4 HD6417750 CPU. 386 387config CPU_SUBTYPE_SH7091 388 bool "Support SH7091 processor" 389 select CPU_SH4 390 help 391 Select SH7091 if you have an SH-4 based Sega device (such as 392 the Dreamcast, Naomi, and Naomi 2). 393 394config CPU_SUBTYPE_SH7750R 395 bool "Support SH7750R processor" 396 select CPU_SH4 397 398config CPU_SUBTYPE_SH7750S 399 bool "Support SH7750S processor" 400 select CPU_SH4 401 402config CPU_SUBTYPE_SH7751 403 bool "Support SH7751 processor" 404 select CPU_SH4 405 help 406 Select SH7751 if you have a 166 Mhz SH-4 HD6417751 CPU, 407 or if you have a HD6417751R CPU. 408 409config CPU_SUBTYPE_SH7751R 410 bool "Support SH7751R processor" 411 select CPU_SH4 412 413config CPU_SUBTYPE_SH7760 414 bool "Support SH7760 processor" 415 select CPU_SH4 416 417config CPU_SUBTYPE_SH4_202 418 bool "Support SH4-202 processor" 419 select CPU_SH4 420 421# SH-4A Processor Support 422 423config CPU_SUBTYPE_SH7723 424 bool "Support SH7723 processor" 425 select CPU_SH4A 426 select CPU_SHX2 427 select ARCH_SHMOBILE 428 select ARCH_SPARSEMEM_ENABLE 429 select SYS_SUPPORTS_SH_CMT 430 select PINCTRL 431 help 432 Select SH7723 if you have an SH-MobileR2 CPU. 433 434config CPU_SUBTYPE_SH7724 435 bool "Support SH7724 processor" 436 select CPU_SH4A 437 select CPU_SHX2 438 select ARCH_SHMOBILE 439 select ARCH_SPARSEMEM_ENABLE 440 select SYS_SUPPORTS_SH_CMT 441 select PINCTRL 442 help 443 Select SH7724 if you have an SH-MobileR2R CPU. 444 445config CPU_SUBTYPE_SH7734 446 bool "Support SH7734 processor" 447 select CPU_SH4A 448 select CPU_SHX2 449 select PINCTRL 450 help 451 Select SH7734 if you have a SH4A SH7734 CPU. 452 453config CPU_SUBTYPE_SH7757 454 bool "Support SH7757 processor" 455 select CPU_SH4A 456 select CPU_SHX2 457 select PINCTRL 458 help 459 Select SH7757 if you have a SH4A SH7757 CPU. 460 461config CPU_SUBTYPE_SH7763 462 bool "Support SH7763 processor" 463 select CPU_SH4A 464 select USB_OHCI_SH if USB_OHCI_HCD 465 help 466 Select SH7763 if you have a SH4A SH7763(R5S77631) CPU. 467 468config CPU_SUBTYPE_SH7770 469 bool "Support SH7770 processor" 470 select CPU_SH4A 471 472config CPU_SUBTYPE_SH7780 473 bool "Support SH7780 processor" 474 select CPU_SH4A 475 476config CPU_SUBTYPE_SH7785 477 bool "Support SH7785 processor" 478 select CPU_SH4A 479 select CPU_SHX2 480 select ARCH_SPARSEMEM_ENABLE 481 select SYS_SUPPORTS_NUMA 482 select PINCTRL 483 484config CPU_SUBTYPE_SH7786 485 bool "Support SH7786 processor" 486 select CPU_SH4A 487 select CPU_SHX3 488 select CPU_HAS_PTEAEX 489 select GENERIC_CLOCKEVENTS_BROADCAST if SMP 490 select USB_OHCI_SH if USB_OHCI_HCD 491 select USB_EHCI_SH if USB_EHCI_HCD 492 select PINCTRL 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 GPIOLIB 500 select PINCTRL 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_SH_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_SH_CMT 518 select PINCTRL 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_SH_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_PCLK_FREQ 561 int "Peripheral clock frequency (in Hz)" 562 depends on SH_CLK_CPG_LEGACY 563 default "31250000" if CPU_SUBTYPE_SH7619 564 default "33333333" if CPU_SUBTYPE_SH7770 || \ 565 CPU_SUBTYPE_SH7760 || \ 566 CPU_SUBTYPE_SH7705 || \ 567 CPU_SUBTYPE_SH7203 || \ 568 CPU_SUBTYPE_SH7206 || \ 569 CPU_SUBTYPE_SH7263 || \ 570 CPU_SUBTYPE_MXG 571 default "60000000" if CPU_SUBTYPE_SH7751 || CPU_SUBTYPE_SH7751R 572 default "66000000" if CPU_SUBTYPE_SH4_202 573 default "50000000" 574 help 575 This option is used to specify the peripheral clock frequency. 576 This is necessary for determining the reference clock value on 577 platforms lacking an RTC. 578 579config SH_CLK_CPG 580 def_bool y 581 582config SH_CLK_CPG_LEGACY 583 depends on SH_CLK_CPG 584 def_bool y if !CPU_SUBTYPE_SH7785 && !ARCH_SHMOBILE && \ 585 !CPU_SHX3 && !CPU_SUBTYPE_SH7757 && \ 586 !CPU_SUBTYPE_SH7734 && !CPU_SUBTYPE_SH7264 && \ 587 !CPU_SUBTYPE_SH7269 588 589endmenu 590 591menu "CPU Frequency scaling" 592source "drivers/cpufreq/Kconfig" 593endmenu 594 595source "arch/sh/drivers/Kconfig" 596 597endmenu 598 599menu "Kernel features" 600 601source kernel/Kconfig.hz 602 603config KEXEC 604 bool "kexec system call (EXPERIMENTAL)" 605 depends on SUPERH32 && MMU 606 select KEXEC_CORE 607 help 608 kexec is a system call that implements the ability to shutdown your 609 current kernel, and to start another kernel. It is like a reboot 610 but it is independent of the system firmware. And like a reboot 611 you can start any kernel with it, not just Linux. 612 613 The name comes from the similarity to the exec system call. 614 615 It is an ongoing process to be certain the hardware in a machine 616 is properly shutdown, so do not be surprised if this code does not 617 initially work for you. As of this writing the exact hardware 618 interface is strongly in flux, so no good recommendation can be 619 made. 620 621config CRASH_DUMP 622 bool "kernel crash dumps (EXPERIMENTAL)" 623 depends on SUPERH32 && BROKEN_ON_SMP 624 help 625 Generate crash dump after being started by kexec. 626 This should be normally only set in special crash dump kernels 627 which are loaded in the main kernel with kexec-tools into 628 a specially reserved region and then later executed after 629 a crash by kdump/kexec. The crash dump kernel must be compiled 630 to a memory address not used by the main kernel using 631 PHYSICAL_START. 632 633 For more details see Documentation/kdump/kdump.txt 634 635config KEXEC_JUMP 636 bool "kexec jump (EXPERIMENTAL)" 637 depends on SUPERH32 && KEXEC && HIBERNATION 638 help 639 Jump between original kernel and kexeced kernel and invoke 640 code via KEXEC 641 642config PHYSICAL_START 643 hex "Physical address where the kernel is loaded" if (EXPERT || CRASH_DUMP) 644 default MEMORY_START 645 ---help--- 646 This gives the physical address where the kernel is loaded 647 and is ordinarily the same as MEMORY_START. 648 649 Different values are primarily used in the case of kexec on panic 650 where the fail safe kernel needs to run at a different address 651 than the panic-ed kernel. 652 653config SECCOMP 654 bool "Enable seccomp to safely compute untrusted bytecode" 655 depends on PROC_FS 656 help 657 This kernel feature is useful for number crunching applications 658 that may need to compute untrusted bytecode during their 659 execution. By using pipes or other transports made available to 660 the process as file descriptors supporting the read/write 661 syscalls, it's possible to isolate those applications in 662 their own address space using seccomp. Once seccomp is 663 enabled via prctl, it cannot be disabled and the task is only 664 allowed to execute a few safe syscalls defined by each seccomp 665 mode. 666 667 If unsure, say N. 668 669config SMP 670 bool "Symmetric multi-processing support" 671 depends on SYS_SUPPORTS_SMP 672 ---help--- 673 This enables support for systems with more than one CPU. If you have 674 a system with only one CPU, say N. If you have a system with more 675 than one CPU, say Y. 676 677 If you say N here, the kernel will run on uni- and multiprocessor 678 machines, but will use only one CPU of a multiprocessor machine. If 679 you say Y here, the kernel will run on many, but not all, 680 uniprocessor machines. On a uniprocessor machine, the kernel 681 will run faster if you say N here. 682 683 People using multiprocessor machines who say Y here should also say 684 Y to "Enhanced Real Time Clock Support", below. 685 686 See also <file:Documentation/lockup-watchdogs.txt> and the SMP-HOWTO 687 available at <http://www.tldp.org/docs.html#howto>. 688 689 If you don't know what to do here, say N. 690 691config NR_CPUS 692 int "Maximum number of CPUs (2-32)" 693 range 2 32 694 depends on SMP 695 default "4" if CPU_SUBTYPE_SHX3 696 default "2" 697 help 698 This allows you to specify the maximum number of CPUs which this 699 kernel will support. The maximum supported value is 32 and the 700 minimum value which makes sense is 2. 701 702 This is purely to save memory - each supported CPU adds 703 approximately eight kilobytes to the kernel image. 704 705config HOTPLUG_CPU 706 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)" 707 depends on SMP 708 help 709 Say Y here to experiment with turning CPUs off and on. CPUs 710 can be controlled through /sys/devices/system/cpu. 711 712source "kernel/Kconfig.preempt" 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