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kernel / arch / sh / Kconfig
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1# SPDX-License-Identifier: GPL-2.0 2config SUPERH 3 def_bool y 4 select ARCH_HAS_BINFMT_FLAT if !MMU 5 select ARCH_HAS_PTE_SPECIAL 6 select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST 7 select ARCH_MIGHT_HAVE_PC_PARPORT 8 select HAVE_PATA_PLATFORM 9 select CLKDEV_LOOKUP 10 select DMA_DECLARE_COHERENT 11 select HAVE_IDE if HAS_IOPORT_MAP 12 select HAVE_MEMBLOCK_NODE_MAP 13 select HAVE_OPROFILE 14 select HAVE_ARCH_TRACEHOOK 15 select HAVE_PERF_EVENTS 16 select HAVE_DEBUG_BUGVERBOSE 17 select HAVE_FAST_GUP if MMU 18 select ARCH_HAVE_CUSTOM_GPIO_H 19 select ARCH_HAVE_NMI_SAFE_CMPXCHG if (GUSA_RB || CPU_SH4A) 20 select ARCH_HAS_GCOV_PROFILE_ALL 21 select PERF_USE_VMALLOC 22 select HAVE_DEBUG_KMEMLEAK 23 select HAVE_KERNEL_GZIP 24 select CPU_NO_EFFICIENT_FFS 25 select HAVE_KERNEL_BZIP2 26 select HAVE_KERNEL_LZMA 27 select HAVE_KERNEL_XZ 28 select HAVE_KERNEL_LZO 29 select HAVE_UID16 30 select ARCH_WANT_IPC_PARSE_VERSION 31 select HAVE_SYSCALL_TRACEPOINTS 32 select HAVE_REGS_AND_STACK_ACCESS_API 33 select MAY_HAVE_SPARSE_IRQ 34 select IRQ_FORCED_THREADING 35 select RTC_LIB 36 select GENERIC_ATOMIC64 37 select GENERIC_IRQ_SHOW 38 select GENERIC_SMP_IDLE_THREAD 39 select GENERIC_IDLE_POLL_SETUP 40 select GENERIC_CLOCKEVENTS 41 select GENERIC_CMOS_UPDATE if SH_SH03 || SH_DREAMCAST 42 select GENERIC_PCI_IOMAP if PCI 43 select GENERIC_SCHED_CLOCK 44 select GENERIC_STRNCPY_FROM_USER 45 select GENERIC_STRNLEN_USER 46 select HAVE_MOD_ARCH_SPECIFIC if DWARF_UNWINDER 47 select MODULES_USE_ELF_RELA 48 select NO_GENERIC_PCI_IOPORT_MAP if PCI 49 select OLD_SIGSUSPEND 50 select OLD_SIGACTION 51 select PCI_DOMAINS if PCI 52 select HAVE_ARCH_AUDITSYSCALL 53 select HAVE_FUTEX_CMPXCHG if FUTEX 54 select HAVE_NMI 55 select NEED_SG_DMA_LENGTH 56 select ARCH_HAS_GIGANTIC_PAGE 57 58 help 59 The SuperH is a RISC processor targeted for use in embedded systems 60 and consumer electronics; it was also used in the Sega Dreamcast 61 gaming console. The SuperH port has a home page at 62 <http://www.linux-sh.org/>. 63 64config SUPERH32 65 def_bool "$(ARCH)" = "sh" 66 select ARCH_32BIT_OFF_T 67 select GUP_GET_PTE_LOW_HIGH if X2TLB 68 select HAVE_KPROBES 69 select HAVE_KRETPROBES 70 select HAVE_IOREMAP_PROT if MMU && !X2TLB 71 select HAVE_FUNCTION_TRACER 72 select HAVE_FTRACE_MCOUNT_RECORD 73 select HAVE_DYNAMIC_FTRACE 74 select HAVE_FTRACE_NMI_ENTER if DYNAMIC_FTRACE 75 select ARCH_WANT_IPC_PARSE_VERSION 76 select HAVE_FUNCTION_GRAPH_TRACER 77 select HAVE_ARCH_KGDB 78 select HAVE_HW_BREAKPOINT 79 select HAVE_MIXED_BREAKPOINTS_REGS 80 select PERF_EVENTS 81 select ARCH_HIBERNATION_POSSIBLE if MMU 82 select SPARSE_IRQ 83 select HAVE_STACKPROTECTOR 84 85config SUPERH64 86 def_bool "$(ARCH)" = "sh64" 87 select HAVE_EXIT_THREAD 88 select KALLSYMS 89 90config ARCH_DEFCONFIG 91 string 92 default "arch/sh/configs/shx3_defconfig" if SUPERH32 93 default "arch/sh/configs/cayman_defconfig" if SUPERH64 94 95config GENERIC_BUG 96 def_bool y 97 depends on BUG && SUPERH32 98 99config GENERIC_CSUM 100 def_bool y 101 depends on SUPERH64 102 103config GENERIC_HWEIGHT 104 def_bool y 105 106config GENERIC_CALIBRATE_DELAY 107 bool 108 109config GENERIC_LOCKBREAK 110 def_bool y 111 depends on SMP && PREEMPTION 112 113config ARCH_SUSPEND_POSSIBLE 114 def_bool n 115 116config ARCH_HIBERNATION_POSSIBLE 117 def_bool n 118 119config SYS_SUPPORTS_APM_EMULATION 120 bool 121 select ARCH_SUSPEND_POSSIBLE 122 123config SYS_SUPPORTS_HUGETLBFS 124 bool 125 126config SYS_SUPPORTS_SMP 127 bool 128 129config SYS_SUPPORTS_NUMA 130 bool 131 132config STACKTRACE_SUPPORT 133 def_bool y 134 135config LOCKDEP_SUPPORT 136 def_bool y 137 138config ARCH_HAS_ILOG2_U32 139 def_bool n 140 141config ARCH_HAS_ILOG2_U64 142 def_bool n 143 144config NO_IOPORT_MAP 145 def_bool !PCI 146 depends on !SH_CAYMAN && !SH_SH4202_MICRODEV && !SH_SHMIN && \ 147 !SH_HP6XX && !SH_SOLUTION_ENGINE 148 149config IO_TRAPPED 150 bool 151 152config SWAP_IO_SPACE 153 bool 154 155config DMA_COHERENT 156 bool 157 158config DMA_NONCOHERENT 159 def_bool !DMA_COHERENT 160 select ARCH_HAS_SYNC_DMA_FOR_DEVICE 161 162config PGTABLE_LEVELS 163 default 3 if X2TLB 164 default 2 165 166menu "System type" 167 168# 169# Processor families 170# 171config CPU_SH2 172 bool 173 select SH_INTC 174 175config CPU_SH2A 176 bool 177 select CPU_SH2 178 select UNCACHED_MAPPING 179 180config CPU_J2 181 bool 182 select CPU_SH2 183 select OF 184 select OF_EARLY_FLATTREE 185 186config CPU_SH3 187 bool 188 select CPU_HAS_INTEVT 189 select CPU_HAS_SR_RB 190 select SH_INTC 191 select SYS_SUPPORTS_SH_TMU 192 193config CPU_SH4 194 bool 195 select CPU_HAS_INTEVT 196 select CPU_HAS_SR_RB 197 select CPU_HAS_FPU if !CPU_SH4AL_DSP 198 select SH_INTC 199 select SYS_SUPPORTS_SH_TMU 200 select SYS_SUPPORTS_HUGETLBFS if MMU 201 202config CPU_SH4A 203 bool 204 select CPU_SH4 205 206config CPU_SH4AL_DSP 207 bool 208 select CPU_SH4A 209 select CPU_HAS_DSP 210 211config CPU_SH5 212 bool 213 select CPU_HAS_FPU 214 select SYS_SUPPORTS_SH_TMU 215 select SYS_SUPPORTS_HUGETLBFS if MMU 216 217config CPU_SHX2 218 bool 219 220config CPU_SHX3 221 bool 222 select DMA_COHERENT 223 select SYS_SUPPORTS_SMP 224 select SYS_SUPPORTS_NUMA 225 226config ARCH_SHMOBILE 227 bool 228 select ARCH_SUSPEND_POSSIBLE 229 select PM 230 231config CPU_HAS_PMU 232 depends on CPU_SH4 || CPU_SH4A 233 default y 234 bool 235 236if SUPERH32 237 238choice 239 prompt "Processor sub-type selection" 240 241# 242# Processor subtypes 243# 244 245# SH-2 Processor Support 246 247config CPU_SUBTYPE_SH7619 248 bool "Support SH7619 processor" 249 select CPU_SH2 250 select SYS_SUPPORTS_SH_CMT 251 252config CPU_SUBTYPE_J2 253 bool "Support J2 processor" 254 select CPU_J2 255 select SYS_SUPPORTS_SMP 256 select GENERIC_CLOCKEVENTS_BROADCAST if SMP 257 258# SH-2A Processor Support 259 260config CPU_SUBTYPE_SH7201 261 bool "Support SH7201 processor" 262 select CPU_SH2A 263 select CPU_HAS_FPU 264 select SYS_SUPPORTS_SH_MTU2 265 266config CPU_SUBTYPE_SH7203 267 bool "Support SH7203 processor" 268 select CPU_SH2A 269 select CPU_HAS_FPU 270 select SYS_SUPPORTS_SH_CMT 271 select SYS_SUPPORTS_SH_MTU2 272 select PINCTRL 273 274config CPU_SUBTYPE_SH7206 275 bool "Support SH7206 processor" 276 select CPU_SH2A 277 select SYS_SUPPORTS_SH_CMT 278 select SYS_SUPPORTS_SH_MTU2 279 280config CPU_SUBTYPE_SH7263 281 bool "Support SH7263 processor" 282 select CPU_SH2A 283 select CPU_HAS_FPU 284 select SYS_SUPPORTS_SH_CMT 285 select SYS_SUPPORTS_SH_MTU2 286 287config CPU_SUBTYPE_SH7264 288 bool "Support SH7264 processor" 289 select CPU_SH2A 290 select CPU_HAS_FPU 291 select SYS_SUPPORTS_SH_CMT 292 select SYS_SUPPORTS_SH_MTU2 293 select PINCTRL 294 295config CPU_SUBTYPE_SH7269 296 bool "Support SH7269 processor" 297 select CPU_SH2A 298 select CPU_HAS_FPU 299 select SYS_SUPPORTS_SH_CMT 300 select SYS_SUPPORTS_SH_MTU2 301 select PINCTRL 302 303config CPU_SUBTYPE_MXG 304 bool "Support MX-G processor" 305 select CPU_SH2A 306 select SYS_SUPPORTS_SH_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_SH_CMT 360 select USB_OHCI_SH if USB_OHCI_HCD 361 select PINCTRL 362 help 363 Select SH7720 if you have a SH3-DSP SH7720 CPU. 364 365config CPU_SUBTYPE_SH7721 366 bool "Support SH7721 processor" 367 select CPU_SH3 368 select CPU_HAS_DSP 369 select SYS_SUPPORTS_SH_CMT 370 select USB_OHCI_SH if USB_OHCI_HCD 371 help 372 Select SH7721 if you have a SH3-DSP SH7721 CPU. 373 374# SH-4 Processor Support 375 376config CPU_SUBTYPE_SH7750 377 bool "Support SH7750 processor" 378 select CPU_SH4 379 help 380 Select SH7750 if you have a 200 Mhz SH-4 HD6417750 CPU. 381 382config CPU_SUBTYPE_SH7091 383 bool "Support SH7091 processor" 384 select CPU_SH4 385 help 386 Select SH7091 if you have an SH-4 based Sega device (such as 387 the Dreamcast, Naomi, and Naomi 2). 388 389config CPU_SUBTYPE_SH7750R 390 bool "Support SH7750R processor" 391 select CPU_SH4 392 393config CPU_SUBTYPE_SH7750S 394 bool "Support SH7750S processor" 395 select CPU_SH4 396 397config CPU_SUBTYPE_SH7751 398 bool "Support SH7751 processor" 399 select CPU_SH4 400 help 401 Select SH7751 if you have a 166 Mhz SH-4 HD6417751 CPU, 402 or if you have a HD6417751R CPU. 403 404config CPU_SUBTYPE_SH7751R 405 bool "Support SH7751R processor" 406 select CPU_SH4 407 408config CPU_SUBTYPE_SH7760 409 bool "Support SH7760 processor" 410 select CPU_SH4 411 412config CPU_SUBTYPE_SH4_202 413 bool "Support SH4-202 processor" 414 select CPU_SH4 415 416# SH-4A Processor Support 417 418config CPU_SUBTYPE_SH7723 419 bool "Support SH7723 processor" 420 select CPU_SH4A 421 select CPU_SHX2 422 select ARCH_SHMOBILE 423 select ARCH_SPARSEMEM_ENABLE 424 select SYS_SUPPORTS_SH_CMT 425 select PINCTRL 426 help 427 Select SH7723 if you have an SH-MobileR2 CPU. 428 429config CPU_SUBTYPE_SH7724 430 bool "Support SH7724 processor" 431 select CPU_SH4A 432 select CPU_SHX2 433 select ARCH_SHMOBILE 434 select ARCH_SPARSEMEM_ENABLE 435 select SYS_SUPPORTS_SH_CMT 436 select PINCTRL 437 help 438 Select SH7724 if you have an SH-MobileR2R CPU. 439 440config CPU_SUBTYPE_SH7734 441 bool "Support SH7734 processor" 442 select CPU_SH4A 443 select CPU_SHX2 444 select PINCTRL 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 PINCTRL 453 help 454 Select SH7757 if you have a SH4A SH7757 CPU. 455 456config CPU_SUBTYPE_SH7763 457 bool "Support SH7763 processor" 458 select CPU_SH4A 459 select USB_OHCI_SH if USB_OHCI_HCD 460 help 461 Select SH7763 if you have a SH4A SH7763(R5S77631) CPU. 462 463config CPU_SUBTYPE_SH7770 464 bool "Support SH7770 processor" 465 select CPU_SH4A 466 467config CPU_SUBTYPE_SH7780 468 bool "Support SH7780 processor" 469 select CPU_SH4A 470 471config CPU_SUBTYPE_SH7785 472 bool "Support SH7785 processor" 473 select CPU_SH4A 474 select CPU_SHX2 475 select ARCH_SPARSEMEM_ENABLE 476 select SYS_SUPPORTS_NUMA 477 select PINCTRL 478 479config CPU_SUBTYPE_SH7786 480 bool "Support SH7786 processor" 481 select CPU_SH4A 482 select CPU_SHX3 483 select CPU_HAS_PTEAEX 484 select GENERIC_CLOCKEVENTS_BROADCAST if SMP 485 select USB_OHCI_SH if USB_OHCI_HCD 486 select USB_EHCI_SH if USB_EHCI_HCD 487 select PINCTRL 488 489config CPU_SUBTYPE_SHX3 490 bool "Support SH-X3 processor" 491 select CPU_SH4A 492 select CPU_SHX3 493 select GENERIC_CLOCKEVENTS_BROADCAST if SMP 494 select GPIOLIB 495 select PINCTRL 496 497# SH4AL-DSP Processor Support 498 499config CPU_SUBTYPE_SH7343 500 bool "Support SH7343 processor" 501 select CPU_SH4AL_DSP 502 select ARCH_SHMOBILE 503 select SYS_SUPPORTS_SH_CMT 504 505config CPU_SUBTYPE_SH7722 506 bool "Support SH7722 processor" 507 select CPU_SH4AL_DSP 508 select CPU_SHX2 509 select ARCH_SHMOBILE 510 select ARCH_SPARSEMEM_ENABLE 511 select SYS_SUPPORTS_NUMA 512 select SYS_SUPPORTS_SH_CMT 513 select PINCTRL 514 515config CPU_SUBTYPE_SH7366 516 bool "Support SH7366 processor" 517 select CPU_SH4AL_DSP 518 select CPU_SHX2 519 select ARCH_SHMOBILE 520 select ARCH_SPARSEMEM_ENABLE 521 select SYS_SUPPORTS_NUMA 522 select SYS_SUPPORTS_SH_CMT 523 524endchoice 525 526endif 527 528if SUPERH64 529 530choice 531 prompt "Processor sub-type selection" 532 533# SH-5 Processor Support 534 535config CPU_SUBTYPE_SH5_101 536 bool "Support SH5-101 processor" 537 select CPU_SH5 538 539config CPU_SUBTYPE_SH5_103 540 bool "Support SH5-103 processor" 541 select CPU_SH5 542 543endchoice 544 545endif 546 547source "arch/sh/mm/Kconfig" 548 549source "arch/sh/Kconfig.cpu" 550 551source "arch/sh/boards/Kconfig" 552 553menu "Timer and clock configuration" 554 555config SH_PCLK_FREQ 556 int "Peripheral clock frequency (in Hz)" 557 depends on SH_CLK_CPG_LEGACY 558 default "31250000" if CPU_SUBTYPE_SH7619 559 default "33333333" if CPU_SUBTYPE_SH7770 || \ 560 CPU_SUBTYPE_SH7760 || \ 561 CPU_SUBTYPE_SH7705 || \ 562 CPU_SUBTYPE_SH7203 || \ 563 CPU_SUBTYPE_SH7206 || \ 564 CPU_SUBTYPE_SH7263 || \ 565 CPU_SUBTYPE_MXG 566 default "60000000" if CPU_SUBTYPE_SH7751 || CPU_SUBTYPE_SH7751R 567 default "66000000" if CPU_SUBTYPE_SH4_202 568 default "50000000" 569 help 570 This option is used to specify the peripheral clock frequency. 571 This is necessary for determining the reference clock value on 572 platforms lacking an RTC. 573 574config SH_CLK_CPG 575 def_bool y 576 577config SH_CLK_CPG_LEGACY 578 depends on SH_CLK_CPG 579 def_bool y if !CPU_SUBTYPE_SH7785 && !ARCH_SHMOBILE && \ 580 !CPU_SHX3 && !CPU_SUBTYPE_SH7757 && \ 581 !CPU_SUBTYPE_SH7734 && !CPU_SUBTYPE_SH7264 && \ 582 !CPU_SUBTYPE_SH7269 583 584endmenu 585 586menu "CPU Frequency scaling" 587source "drivers/cpufreq/Kconfig" 588endmenu 589 590source "arch/sh/drivers/Kconfig" 591 592endmenu 593 594menu "Kernel features" 595 596source "kernel/Kconfig.hz" 597 598config KEXEC 599 bool "kexec system call (EXPERIMENTAL)" 600 depends on SUPERH32 && MMU 601 select KEXEC_CORE 602 help 603 kexec is a system call that implements the ability to shutdown your 604 current kernel, and to start another kernel. It is like a reboot 605 but it is independent of the system firmware. And like a reboot 606 you can start any kernel with it, not just Linux. 607 608 The name comes from the similarity to the exec system call. 609 610 It is an ongoing process to be certain the hardware in a machine 611 is properly shutdown, so do not be surprised if this code does not 612 initially work for you. As of this writing the exact hardware 613 interface is strongly in flux, so no good recommendation can be 614 made. 615 616config CRASH_DUMP 617 bool "kernel crash dumps (EXPERIMENTAL)" 618 depends on SUPERH32 && BROKEN_ON_SMP 619 help 620 Generate crash dump after being started by kexec. 621 This should be normally only set in special crash dump kernels 622 which are loaded in the main kernel with kexec-tools into 623 a specially reserved region and then later executed after 624 a crash by kdump/kexec. The crash dump kernel must be compiled 625 to a memory address not used by the main kernel using 626 PHYSICAL_START. 627 628 For more details see Documentation/admin-guide/kdump/kdump.rst 629 630config KEXEC_JUMP 631 bool "kexec jump (EXPERIMENTAL)" 632 depends on SUPERH32 && KEXEC && HIBERNATION 633 help 634 Jump between original kernel and kexeced kernel and invoke 635 code via KEXEC 636 637config PHYSICAL_START 638 hex "Physical address where the kernel is loaded" if (EXPERT || CRASH_DUMP) 639 default MEMORY_START 640 ---help--- 641 This gives the physical address where the kernel is loaded 642 and is ordinarily the same as MEMORY_START. 643 644 Different values are primarily used in the case of kexec on panic 645 where the fail safe kernel needs to run at a different address 646 than the panic-ed kernel. 647 648config SECCOMP 649 bool "Enable seccomp to safely compute untrusted bytecode" 650 depends on PROC_FS 651 help 652 This kernel feature is useful for number crunching applications 653 that may need to compute untrusted bytecode during their 654 execution. By using pipes or other transports made available to 655 the process as file descriptors supporting the read/write 656 syscalls, it's possible to isolate those applications in 657 their own address space using seccomp. Once seccomp is 658 enabled via prctl, it cannot be disabled and the task is only 659 allowed to execute a few safe syscalls defined by each seccomp 660 mode. 661 662 If unsure, say N. 663 664config SMP 665 bool "Symmetric multi-processing support" 666 depends on SYS_SUPPORTS_SMP 667 ---help--- 668 This enables support for systems with more than one CPU. If you have 669 a system with only one CPU, say N. If you have a system with more 670 than one CPU, say Y. 671 672 If you say N here, the kernel will run on uni- and multiprocessor 673 machines, but will use only one CPU of a multiprocessor machine. If 674 you say Y here, the kernel will run on many, but not all, 675 uniprocessor machines. On a uniprocessor machine, the kernel 676 will run faster if you say N here. 677 678 People using multiprocessor machines who say Y here should also say 679 Y to "Enhanced Real Time Clock Support", below. 680 681 See also <file:Documentation/admin-guide/lockup-watchdogs.rst> and the SMP-HOWTO 682 available at <http://www.tldp.org/docs.html#howto>. 683 684 If you don't know what to do here, say N. 685 686config NR_CPUS 687 int "Maximum number of CPUs (2-32)" 688 range 2 32 689 depends on SMP 690 default "4" if CPU_SUBTYPE_SHX3 691 default "2" 692 help 693 This allows you to specify the maximum number of CPUs which this 694 kernel will support. The maximum supported value is 32 and the 695 minimum value which makes sense is 2. 696 697 This is purely to save memory - each supported CPU adds 698 approximately eight kilobytes to the kernel image. 699 700config HOTPLUG_CPU 701 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)" 702 depends on SMP 703 help 704 Say Y here to experiment with turning CPUs off and on. CPUs 705 can be controlled through /sys/devices/system/cpu. 706 707config GUSA 708 def_bool y 709 depends on !SMP && SUPERH32 710 help 711 This enables support for gUSA (general UserSpace Atomicity). 712 This is the default implementation for both UP and non-ll/sc 713 CPUs, and is used by the libc, amongst others. 714 715 For additional information, design information can be found 716 in <http://lc.linux.or.jp/lc2002/papers/niibe0919p.pdf>. 717 718 This should only be disabled for special cases where alternate 719 atomicity implementations exist. 720 721config GUSA_RB 722 bool "Implement atomic operations by roll-back (gRB) (EXPERIMENTAL)" 723 depends on GUSA && CPU_SH3 || (CPU_SH4 && !CPU_SH4A) 724 help 725 Enabling this option will allow the kernel to implement some 726 atomic operations using a software implementation of load-locked/ 727 store-conditional (LLSC). On machines which do not have hardware 728 LLSC, this should be more efficient than the other alternative of 729 disabling interrupts around the atomic sequence. 730 731config HW_PERF_EVENTS 732 bool "Enable hardware performance counter support for perf events" 733 depends on PERF_EVENTS && CPU_HAS_PMU 734 default y 735 help 736 Enable hardware performance counter support for perf events. If 737 disabled, perf events will use software events only. 738 739source "drivers/sh/Kconfig" 740 741endmenu 742 743menu "Boot options" 744 745config USE_BUILTIN_DTB 746 bool "Use builtin DTB" 747 default n 748 depends on SH_DEVICE_TREE 749 help 750 Link a device tree blob for particular hardware into the kernel, 751 suppressing use of the DTB pointer provided by the bootloader. 752 This option should only be used with legacy bootloaders that are 753 not capable of providing a DTB to the kernel, or for experimental 754 hardware without stable device tree bindings. 755 756config BUILTIN_DTB_SOURCE 757 string "Source file for builtin DTB" 758 default "" 759 depends on USE_BUILTIN_DTB 760 help 761 Base name (without suffix, relative to arch/sh/boot/dts) for the 762 a DTS file that will be used to produce the DTB linked into the 763 kernel. 764 765config ZERO_PAGE_OFFSET 766 hex 767 default "0x00010000" if PAGE_SIZE_64KB || SH_RTS7751R2D || \ 768 SH_7751_SOLUTION_ENGINE 769 default "0x00004000" if PAGE_SIZE_16KB || SH_SH03 770 default "0x00002000" if PAGE_SIZE_8KB 771 default "0x00001000" 772 help 773 This sets the default offset of zero page. 774 775config BOOT_LINK_OFFSET 776 hex 777 default "0x00210000" if SH_SHMIN 778 default "0x00400000" if SH_CAYMAN 779 default "0x00810000" if SH_7780_SOLUTION_ENGINE 780 default "0x009e0000" if SH_TITAN 781 default "0x01800000" if SH_SDK7780 782 default "0x02000000" if SH_EDOSK7760 783 default "0x00800000" 784 help 785 This option allows you to set the link address offset of the zImage. 786 This can be useful if you are on a board which has a small amount of 787 memory. 788 789config ENTRY_OFFSET 790 hex 791 default "0x00001000" if PAGE_SIZE_4KB 792 default "0x00002000" if PAGE_SIZE_8KB 793 default "0x00004000" if PAGE_SIZE_16KB 794 default "0x00010000" if PAGE_SIZE_64KB 795 default "0x00000000" 796 797config ROMIMAGE_MMCIF 798 bool "Include MMCIF loader in romImage (EXPERIMENTAL)" 799 depends on CPU_SUBTYPE_SH7724 800 help 801 Say Y here to include experimental MMCIF loading code in 802 romImage. With this enabled it is possible to write the romImage 803 kernel image to an MMC card and boot the kernel straight from 804 the reset vector. At reset the processor Mask ROM will load the 805 first part of the romImage which in turn loads the rest the kernel 806 image to RAM using the MMCIF hardware block. 807 808choice 809 prompt "Kernel command line" 810 optional 811 default CMDLINE_OVERWRITE 812 help 813 Setting this option allows the kernel command line arguments 814 to be set. 815 816config CMDLINE_OVERWRITE 817 bool "Overwrite bootloader kernel arguments" 818 help 819 Given string will overwrite any arguments passed in by 820 a bootloader. 821 822config CMDLINE_EXTEND 823 bool "Extend bootloader kernel arguments" 824 help 825 Given string will be concatenated with arguments passed in 826 by a bootloader. 827 828endchoice 829 830config CMDLINE 831 string "Kernel command line arguments string" 832 depends on CMDLINE_OVERWRITE || CMDLINE_EXTEND 833 default "console=ttySC1,115200" 834 835endmenu 836 837menu "Bus options" 838 839config SUPERHYWAY 840 tristate "SuperHyway Bus support" 841 depends on CPU_SUBTYPE_SH4_202 842 843config MAPLE 844 bool "Maple Bus support" 845 depends on SH_DREAMCAST 846 help 847 The Maple Bus is SEGA's serial communication bus for peripherals 848 on the Dreamcast. Without this bus support you won't be able to 849 get your Dreamcast keyboard etc to work, so most users 850 probably want to say 'Y' here, unless you are only using the 851 Dreamcast with a serial line terminal or a remote network 852 connection. 853 854endmenu 855 856menu "Power management options (EXPERIMENTAL)" 857 858source "kernel/power/Kconfig" 859 860source "drivers/cpuidle/Kconfig" 861 862endmenu