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 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 ARCH_HAVE_CUSTOM_GPIO_H 18 select ARCH_HAVE_NMI_SAFE_CMPXCHG if (GUSA_RB || CPU_SH4A) 19 select ARCH_HAS_GCOV_PROFILE_ALL 20 select PERF_USE_VMALLOC 21 select HAVE_DEBUG_KMEMLEAK 22 select HAVE_KERNEL_GZIP 23 select CPU_NO_EFFICIENT_FFS 24 select HAVE_KERNEL_BZIP2 25 select HAVE_KERNEL_LZMA 26 select HAVE_KERNEL_XZ 27 select HAVE_KERNEL_LZO 28 select HAVE_UID16 29 select ARCH_WANT_IPC_PARSE_VERSION 30 select HAVE_SYSCALL_TRACEPOINTS 31 select HAVE_REGS_AND_STACK_ACCESS_API 32 select MAY_HAVE_SPARSE_IRQ 33 select IRQ_FORCED_THREADING 34 select RTC_LIB 35 select GENERIC_ATOMIC64 36 select GENERIC_IRQ_SHOW 37 select GENERIC_SMP_IDLE_THREAD 38 select GENERIC_IDLE_POLL_SETUP 39 select GENERIC_CLOCKEVENTS 40 select GENERIC_CMOS_UPDATE if SH_SH03 || SH_DREAMCAST 41 select GENERIC_PCI_IOMAP if PCI 42 select GENERIC_SCHED_CLOCK 43 select GENERIC_STRNCPY_FROM_USER 44 select GENERIC_STRNLEN_USER 45 select HAVE_MOD_ARCH_SPECIFIC if DWARF_UNWINDER 46 select MODULES_USE_ELF_RELA 47 select NO_GENERIC_PCI_IOPORT_MAP if PCI 48 select OLD_SIGSUSPEND 49 select OLD_SIGACTION 50 select PCI_DOMAINS if PCI 51 select HAVE_ARCH_AUDITSYSCALL 52 select HAVE_FUTEX_CMPXCHG if FUTEX 53 select HAVE_NMI 54 select NEED_SG_DMA_LENGTH 55 select ARCH_HAS_GIGANTIC_PAGE 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 "$(ARCH)" = "sh" 65 select ARCH_32BIT_OFF_T 66 select HAVE_KPROBES 67 select HAVE_KRETPROBES 68 select HAVE_IOREMAP_PROT if MMU && !X2TLB 69 select HAVE_FUNCTION_TRACER 70 select HAVE_FTRACE_MCOUNT_RECORD 71 select HAVE_DYNAMIC_FTRACE 72 select HAVE_FTRACE_NMI_ENTER if DYNAMIC_FTRACE 73 select ARCH_WANT_IPC_PARSE_VERSION 74 select HAVE_FUNCTION_GRAPH_TRACER 75 select HAVE_ARCH_KGDB 76 select HAVE_HW_BREAKPOINT 77 select HAVE_MIXED_BREAKPOINTS_REGS 78 select PERF_EVENTS 79 select ARCH_HIBERNATION_POSSIBLE if MMU 80 select SPARSE_IRQ 81 select HAVE_STACKPROTECTOR 82 83config SUPERH64 84 def_bool "$(ARCH)" = "sh64" 85 select HAVE_EXIT_THREAD 86 select KALLSYMS 87 88config ARCH_DEFCONFIG 89 string 90 default "arch/sh/configs/shx3_defconfig" if SUPERH32 91 default "arch/sh/configs/cayman_defconfig" if SUPERH64 92 93config GENERIC_BUG 94 def_bool y 95 depends on BUG && SUPERH32 96 97config GENERIC_CSUM 98 def_bool y 99 depends on SUPERH64 100 101config GENERIC_HWEIGHT 102 def_bool y 103 104config GENERIC_CALIBRATE_DELAY 105 bool 106 107config GENERIC_LOCKBREAK 108 def_bool y 109 depends on SMP && PREEMPT 110 111config ARCH_SUSPEND_POSSIBLE 112 def_bool n 113 114config ARCH_HIBERNATION_POSSIBLE 115 def_bool n 116 117config SYS_SUPPORTS_APM_EMULATION 118 bool 119 select ARCH_SUSPEND_POSSIBLE 120 121config SYS_SUPPORTS_HUGETLBFS 122 bool 123 124config SYS_SUPPORTS_SMP 125 bool 126 127config SYS_SUPPORTS_NUMA 128 bool 129 130config STACKTRACE_SUPPORT 131 def_bool y 132 133config LOCKDEP_SUPPORT 134 def_bool y 135 136config ARCH_HAS_ILOG2_U32 137 def_bool n 138 139config ARCH_HAS_ILOG2_U64 140 def_bool n 141 142config NO_IOPORT_MAP 143 def_bool !PCI 144 depends on !SH_CAYMAN && !SH_SH4202_MICRODEV && !SH_SHMIN && \ 145 !SH_HP6XX && !SH_SOLUTION_ENGINE 146 147config IO_TRAPPED 148 bool 149 150config SWAP_IO_SPACE 151 bool 152 153config DMA_COHERENT 154 bool 155 156config DMA_NONCOHERENT 157 def_bool !DMA_COHERENT 158 select ARCH_HAS_SYNC_DMA_FOR_DEVICE 159 160config PGTABLE_LEVELS 161 default 3 if X2TLB 162 default 2 163 164menu "System type" 165 166# 167# Processor families 168# 169config CPU_SH2 170 bool 171 select SH_INTC 172 173config CPU_SH2A 174 bool 175 select CPU_SH2 176 select UNCACHED_MAPPING 177 178config CPU_J2 179 bool 180 select CPU_SH2 181 select OF 182 select OF_EARLY_FLATTREE 183 184config CPU_SH3 185 bool 186 select CPU_HAS_INTEVT 187 select CPU_HAS_SR_RB 188 select SH_INTC 189 select SYS_SUPPORTS_SH_TMU 190 191config CPU_SH4 192 bool 193 select CPU_HAS_INTEVT 194 select CPU_HAS_SR_RB 195 select CPU_HAS_FPU if !CPU_SH4AL_DSP 196 select SH_INTC 197 select SYS_SUPPORTS_SH_TMU 198 select SYS_SUPPORTS_HUGETLBFS if MMU 199 200config CPU_SH4A 201 bool 202 select CPU_SH4 203 204config CPU_SH4AL_DSP 205 bool 206 select CPU_SH4A 207 select CPU_HAS_DSP 208 209config CPU_SH5 210 bool 211 select CPU_HAS_FPU 212 select SYS_SUPPORTS_SH_TMU 213 select SYS_SUPPORTS_HUGETLBFS if MMU 214 215config CPU_SHX2 216 bool 217 218config CPU_SHX3 219 bool 220 select DMA_COHERENT 221 select SYS_SUPPORTS_SMP 222 select SYS_SUPPORTS_NUMA 223 224config ARCH_SHMOBILE 225 bool 226 select ARCH_SUSPEND_POSSIBLE 227 select PM 228 229config CPU_HAS_PMU 230 depends on CPU_SH4 || CPU_SH4A 231 default y 232 bool 233 234if SUPERH32 235 236choice 237 prompt "Processor sub-type selection" 238 239# 240# Processor subtypes 241# 242 243# SH-2 Processor Support 244 245config CPU_SUBTYPE_SH7619 246 bool "Support SH7619 processor" 247 select CPU_SH2 248 select SYS_SUPPORTS_SH_CMT 249 250config CPU_SUBTYPE_J2 251 bool "Support J2 processor" 252 select CPU_J2 253 select SYS_SUPPORTS_SMP 254 select GENERIC_CLOCKEVENTS_BROADCAST if SMP 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_SH_MTU2 263 264config CPU_SUBTYPE_SH7203 265 bool "Support SH7203 processor" 266 select CPU_SH2A 267 select CPU_HAS_FPU 268 select SYS_SUPPORTS_SH_CMT 269 select SYS_SUPPORTS_SH_MTU2 270 select PINCTRL 271 272config CPU_SUBTYPE_SH7206 273 bool "Support SH7206 processor" 274 select CPU_SH2A 275 select SYS_SUPPORTS_SH_CMT 276 select SYS_SUPPORTS_SH_MTU2 277 278config CPU_SUBTYPE_SH7263 279 bool "Support SH7263 processor" 280 select CPU_SH2A 281 select CPU_HAS_FPU 282 select SYS_SUPPORTS_SH_CMT 283 select SYS_SUPPORTS_SH_MTU2 284 285config CPU_SUBTYPE_SH7264 286 bool "Support SH7264 processor" 287 select CPU_SH2A 288 select CPU_HAS_FPU 289 select SYS_SUPPORTS_SH_CMT 290 select SYS_SUPPORTS_SH_MTU2 291 select PINCTRL 292 293config CPU_SUBTYPE_SH7269 294 bool "Support SH7269 processor" 295 select CPU_SH2A 296 select CPU_HAS_FPU 297 select SYS_SUPPORTS_SH_CMT 298 select SYS_SUPPORTS_SH_MTU2 299 select PINCTRL 300 301config CPU_SUBTYPE_MXG 302 bool "Support MX-G processor" 303 select CPU_SH2A 304 select SYS_SUPPORTS_SH_MTU2 305 help 306 Select MX-G if running on an R8A03022BG part. 307 308# SH-3 Processor Support 309 310config CPU_SUBTYPE_SH7705 311 bool "Support SH7705 processor" 312 select CPU_SH3 313 314config CPU_SUBTYPE_SH7706 315 bool "Support SH7706 processor" 316 select CPU_SH3 317 help 318 Select SH7706 if you have a 133 Mhz SH-3 HD6417706 CPU. 319 320config CPU_SUBTYPE_SH7707 321 bool "Support SH7707 processor" 322 select CPU_SH3 323 help 324 Select SH7707 if you have a 60 Mhz SH-3 HD6417707 CPU. 325 326config CPU_SUBTYPE_SH7708 327 bool "Support SH7708 processor" 328 select CPU_SH3 329 help 330 Select SH7708 if you have a 60 Mhz SH-3 HD6417708S or 331 if you have a 100 Mhz SH-3 HD6417708R CPU. 332 333config CPU_SUBTYPE_SH7709 334 bool "Support SH7709 processor" 335 select CPU_SH3 336 help 337 Select SH7709 if you have a 80 Mhz SH-3 HD6417709 CPU. 338 339config CPU_SUBTYPE_SH7710 340 bool "Support SH7710 processor" 341 select CPU_SH3 342 select CPU_HAS_DSP 343 help 344 Select SH7710 if you have a SH3-DSP SH7710 CPU. 345 346config CPU_SUBTYPE_SH7712 347 bool "Support SH7712 processor" 348 select CPU_SH3 349 select CPU_HAS_DSP 350 help 351 Select SH7712 if you have a SH3-DSP SH7712 CPU. 352 353config CPU_SUBTYPE_SH7720 354 bool "Support SH7720 processor" 355 select CPU_SH3 356 select CPU_HAS_DSP 357 select SYS_SUPPORTS_SH_CMT 358 select USB_OHCI_SH if USB_OHCI_HCD 359 select PINCTRL 360 help 361 Select SH7720 if you have a SH3-DSP SH7720 CPU. 362 363config CPU_SUBTYPE_SH7721 364 bool "Support SH7721 processor" 365 select CPU_SH3 366 select CPU_HAS_DSP 367 select SYS_SUPPORTS_SH_CMT 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_SH_CMT 423 select PINCTRL 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_SH_CMT 434 select PINCTRL 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 PINCTRL 443 help 444 Select SH7734 if you have a SH4A SH7734 CPU. 445 446config CPU_SUBTYPE_SH7757 447 bool "Support SH7757 processor" 448 select CPU_SH4A 449 select CPU_SHX2 450 select PINCTRL 451 help 452 Select SH7757 if you have a SH4A SH7757 CPU. 453 454config CPU_SUBTYPE_SH7763 455 bool "Support SH7763 processor" 456 select CPU_SH4A 457 select USB_OHCI_SH if USB_OHCI_HCD 458 help 459 Select SH7763 if you have a SH4A SH7763(R5S77631) CPU. 460 461config CPU_SUBTYPE_SH7770 462 bool "Support SH7770 processor" 463 select CPU_SH4A 464 465config CPU_SUBTYPE_SH7780 466 bool "Support SH7780 processor" 467 select CPU_SH4A 468 469config CPU_SUBTYPE_SH7785 470 bool "Support SH7785 processor" 471 select CPU_SH4A 472 select CPU_SHX2 473 select ARCH_SPARSEMEM_ENABLE 474 select SYS_SUPPORTS_NUMA 475 select PINCTRL 476 477config CPU_SUBTYPE_SH7786 478 bool "Support SH7786 processor" 479 select CPU_SH4A 480 select CPU_SHX3 481 select CPU_HAS_PTEAEX 482 select GENERIC_CLOCKEVENTS_BROADCAST if SMP 483 select USB_OHCI_SH if USB_OHCI_HCD 484 select USB_EHCI_SH if USB_EHCI_HCD 485 select PINCTRL 486 487config CPU_SUBTYPE_SHX3 488 bool "Support SH-X3 processor" 489 select CPU_SH4A 490 select CPU_SHX3 491 select GENERIC_CLOCKEVENTS_BROADCAST if SMP 492 select GPIOLIB 493 select PINCTRL 494 495# SH4AL-DSP Processor Support 496 497config CPU_SUBTYPE_SH7343 498 bool "Support SH7343 processor" 499 select CPU_SH4AL_DSP 500 select ARCH_SHMOBILE 501 select SYS_SUPPORTS_SH_CMT 502 503config CPU_SUBTYPE_SH7722 504 bool "Support SH7722 processor" 505 select CPU_SH4AL_DSP 506 select CPU_SHX2 507 select ARCH_SHMOBILE 508 select ARCH_SPARSEMEM_ENABLE 509 select SYS_SUPPORTS_NUMA 510 select SYS_SUPPORTS_SH_CMT 511 select PINCTRL 512 513config CPU_SUBTYPE_SH7366 514 bool "Support SH7366 processor" 515 select CPU_SH4AL_DSP 516 select CPU_SHX2 517 select ARCH_SHMOBILE 518 select ARCH_SPARSEMEM_ENABLE 519 select SYS_SUPPORTS_NUMA 520 select SYS_SUPPORTS_SH_CMT 521 522endchoice 523 524endif 525 526if SUPERH64 527 528choice 529 prompt "Processor sub-type selection" 530 531# SH-5 Processor Support 532 533config CPU_SUBTYPE_SH5_101 534 bool "Support SH5-101 processor" 535 select CPU_SH5 536 537config CPU_SUBTYPE_SH5_103 538 bool "Support SH5-103 processor" 539 select CPU_SH5 540 541endchoice 542 543endif 544 545source "arch/sh/mm/Kconfig" 546 547source "arch/sh/Kconfig.cpu" 548 549source "arch/sh/boards/Kconfig" 550 551menu "Timer and clock configuration" 552 553config SH_PCLK_FREQ 554 int "Peripheral clock frequency (in Hz)" 555 depends on SH_CLK_CPG_LEGACY 556 default "31250000" if CPU_SUBTYPE_SH7619 557 default "33333333" if CPU_SUBTYPE_SH7770 || \ 558 CPU_SUBTYPE_SH7760 || \ 559 CPU_SUBTYPE_SH7705 || \ 560 CPU_SUBTYPE_SH7203 || \ 561 CPU_SUBTYPE_SH7206 || \ 562 CPU_SUBTYPE_SH7263 || \ 563 CPU_SUBTYPE_MXG 564 default "60000000" if CPU_SUBTYPE_SH7751 || CPU_SUBTYPE_SH7751R 565 default "66000000" if CPU_SUBTYPE_SH4_202 566 default "50000000" 567 help 568 This option is used to specify the peripheral clock frequency. 569 This is necessary for determining the reference clock value on 570 platforms lacking an RTC. 571 572config SH_CLK_CPG 573 def_bool y 574 575config SH_CLK_CPG_LEGACY 576 depends on SH_CLK_CPG 577 def_bool y if !CPU_SUBTYPE_SH7785 && !ARCH_SHMOBILE && \ 578 !CPU_SHX3 && !CPU_SUBTYPE_SH7757 && \ 579 !CPU_SUBTYPE_SH7734 && !CPU_SUBTYPE_SH7264 && \ 580 !CPU_SUBTYPE_SH7269 581 582endmenu 583 584menu "CPU Frequency scaling" 585source "drivers/cpufreq/Kconfig" 586endmenu 587 588source "arch/sh/drivers/Kconfig" 589 590endmenu 591 592menu "Kernel features" 593 594source "kernel/Kconfig.hz" 595 596config KEXEC 597 bool "kexec system call (EXPERIMENTAL)" 598 depends on SUPERH32 && MMU 599 select KEXEC_CORE 600 help 601 kexec is a system call that implements the ability to shutdown your 602 current kernel, and to start another kernel. It is like a reboot 603 but it is independent of the system firmware. And like a reboot 604 you can start any kernel with it, not just Linux. 605 606 The name comes from the similarity to the exec system call. 607 608 It is an ongoing process to be certain the hardware in a machine 609 is properly shutdown, so do not be surprised if this code does not 610 initially work for you. As of this writing the exact hardware 611 interface is strongly in flux, so no good recommendation can be 612 made. 613 614config CRASH_DUMP 615 bool "kernel crash dumps (EXPERIMENTAL)" 616 depends on SUPERH32 && BROKEN_ON_SMP 617 help 618 Generate crash dump after being started by kexec. 619 This should be normally only set in special crash dump kernels 620 which are loaded in the main kernel with kexec-tools into 621 a specially reserved region and then later executed after 622 a crash by kdump/kexec. The crash dump kernel must be compiled 623 to a memory address not used by the main kernel using 624 PHYSICAL_START. 625 626 For more details see Documentation/kdump/kdump.txt 627 628config KEXEC_JUMP 629 bool "kexec jump (EXPERIMENTAL)" 630 depends on SUPERH32 && KEXEC && HIBERNATION 631 help 632 Jump between original kernel and kexeced kernel and invoke 633 code via KEXEC 634 635config PHYSICAL_START 636 hex "Physical address where the kernel is loaded" if (EXPERT || CRASH_DUMP) 637 default MEMORY_START 638 ---help--- 639 This gives the physical address where the kernel is loaded 640 and is ordinarily the same as MEMORY_START. 641 642 Different values are primarily used in the case of kexec on panic 643 where the fail safe kernel needs to run at a different address 644 than the panic-ed kernel. 645 646config SECCOMP 647 bool "Enable seccomp to safely compute untrusted bytecode" 648 depends on PROC_FS 649 help 650 This kernel feature is useful for number crunching applications 651 that may need to compute untrusted bytecode during their 652 execution. By using pipes or other transports made available to 653 the process as file descriptors supporting the read/write 654 syscalls, it's possible to isolate those applications in 655 their own address space using seccomp. Once seccomp is 656 enabled via prctl, it cannot be disabled and the task is only 657 allowed to execute a few safe syscalls defined by each seccomp 658 mode. 659 660 If unsure, say N. 661 662config SMP 663 bool "Symmetric multi-processing support" 664 depends on SYS_SUPPORTS_SMP 665 ---help--- 666 This enables support for systems with more than one CPU. If you have 667 a system with only one CPU, say N. If you have a system with more 668 than one CPU, say Y. 669 670 If you say N here, the kernel will run on uni- and multiprocessor 671 machines, but will use only one CPU of a multiprocessor machine. If 672 you say Y here, the kernel will run on many, but not all, 673 uniprocessor machines. On a uniprocessor machine, the kernel 674 will run faster if you say N here. 675 676 People using multiprocessor machines who say Y here should also say 677 Y to "Enhanced Real Time Clock Support", below. 678 679 See also <file:Documentation/lockup-watchdogs.txt> and the SMP-HOWTO 680 available at <http://www.tldp.org/docs.html#howto>. 681 682 If you don't know what to do here, say N. 683 684config NR_CPUS 685 int "Maximum number of CPUs (2-32)" 686 range 2 32 687 depends on SMP 688 default "4" if CPU_SUBTYPE_SHX3 689 default "2" 690 help 691 This allows you to specify the maximum number of CPUs which this 692 kernel will support. The maximum supported value is 32 and the 693 minimum value which makes sense is 2. 694 695 This is purely to save memory - each supported CPU adds 696 approximately eight kilobytes to the kernel image. 697 698config HOTPLUG_CPU 699 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)" 700 depends on SMP 701 help 702 Say Y here to experiment with turning CPUs off and on. CPUs 703 can be controlled through /sys/devices/system/cpu. 704 705config GUSA 706 def_bool y 707 depends on !SMP && SUPERH32 708 help 709 This enables support for gUSA (general UserSpace Atomicity). 710 This is the default implementation for both UP and non-ll/sc 711 CPUs, and is used by the libc, amongst others. 712 713 For additional information, design information can be found 714 in <http://lc.linux.or.jp/lc2002/papers/niibe0919p.pdf>. 715 716 This should only be disabled for special cases where alternate 717 atomicity implementations exist. 718 719config GUSA_RB 720 bool "Implement atomic operations by roll-back (gRB) (EXPERIMENTAL)" 721 depends on GUSA && CPU_SH3 || (CPU_SH4 && !CPU_SH4A) 722 help 723 Enabling this option will allow the kernel to implement some 724 atomic operations using a software implementation of load-locked/ 725 store-conditional (LLSC). On machines which do not have hardware 726 LLSC, this should be more efficient than the other alternative of 727 disabling interrupts around the atomic sequence. 728 729config HW_PERF_EVENTS 730 bool "Enable hardware performance counter support for perf events" 731 depends on PERF_EVENTS && CPU_HAS_PMU 732 default y 733 help 734 Enable hardware performance counter support for perf events. If 735 disabled, perf events will use software events only. 736 737source "drivers/sh/Kconfig" 738 739endmenu 740 741menu "Boot options" 742 743config USE_BUILTIN_DTB 744 bool "Use builtin DTB" 745 default n 746 depends on SH_DEVICE_TREE 747 help 748 Link a device tree blob for particular hardware into the kernel, 749 suppressing use of the DTB pointer provided by the bootloader. 750 This option should only be used with legacy bootloaders that are 751 not capable of providing a DTB to the kernel, or for experimental 752 hardware without stable device tree bindings. 753 754config BUILTIN_DTB_SOURCE 755 string "Source file for builtin DTB" 756 default "" 757 depends on USE_BUILTIN_DTB 758 help 759 Base name (without suffix, relative to arch/sh/boot/dts) for the 760 a DTS file that will be used to produce the DTB linked into the 761 kernel. 762 763config ZERO_PAGE_OFFSET 764 hex 765 default "0x00010000" if PAGE_SIZE_64KB || SH_RTS7751R2D || \ 766 SH_7751_SOLUTION_ENGINE 767 default "0x00004000" if PAGE_SIZE_16KB || SH_SH03 768 default "0x00002000" if PAGE_SIZE_8KB 769 default "0x00001000" 770 help 771 This sets the default offset of zero page. 772 773config BOOT_LINK_OFFSET 774 hex 775 default "0x00210000" if SH_SHMIN 776 default "0x00400000" if SH_CAYMAN 777 default "0x00810000" if SH_7780_SOLUTION_ENGINE 778 default "0x009e0000" if SH_TITAN 779 default "0x01800000" if SH_SDK7780 780 default "0x02000000" if SH_EDOSK7760 781 default "0x00800000" 782 help 783 This option allows you to set the link address offset of the zImage. 784 This can be useful if you are on a board which has a small amount of 785 memory. 786 787config ENTRY_OFFSET 788 hex 789 default "0x00001000" if PAGE_SIZE_4KB 790 default "0x00002000" if PAGE_SIZE_8KB 791 default "0x00004000" if PAGE_SIZE_16KB 792 default "0x00010000" if PAGE_SIZE_64KB 793 default "0x00000000" 794 795config ROMIMAGE_MMCIF 796 bool "Include MMCIF loader in romImage (EXPERIMENTAL)" 797 depends on CPU_SUBTYPE_SH7724 798 help 799 Say Y here to include experimental MMCIF loading code in 800 romImage. With this enabled it is possible to write the romImage 801 kernel image to an MMC card and boot the kernel straight from 802 the reset vector. At reset the processor Mask ROM will load the 803 first part of the romImage which in turn loads the rest the kernel 804 image to RAM using the MMCIF hardware block. 805 806choice 807 prompt "Kernel command line" 808 optional 809 default CMDLINE_OVERWRITE 810 help 811 Setting this option allows the kernel command line arguments 812 to be set. 813 814config CMDLINE_OVERWRITE 815 bool "Overwrite bootloader kernel arguments" 816 help 817 Given string will overwrite any arguments passed in by 818 a bootloader. 819 820config CMDLINE_EXTEND 821 bool "Extend bootloader kernel arguments" 822 help 823 Given string will be concatenated with arguments passed in 824 by a bootloader. 825 826endchoice 827 828config CMDLINE 829 string "Kernel command line arguments string" 830 depends on CMDLINE_OVERWRITE || CMDLINE_EXTEND 831 default "console=ttySC1,115200" 832 833endmenu 834 835menu "Bus options" 836 837config SUPERHYWAY 838 tristate "SuperHyway Bus support" 839 depends on CPU_SUBTYPE_SH4_202 840 841config MAPLE 842 bool "Maple Bus support" 843 depends on SH_DREAMCAST 844 help 845 The Maple Bus is SEGA's serial communication bus for peripherals 846 on the Dreamcast. Without this bus support you won't be able to 847 get your Dreamcast keyboard etc to work, so most users 848 probably want to say 'Y' here, unless you are only using the 849 Dreamcast with a serial line terminal or a remote network 850 connection. 851 852endmenu 853 854menu "Power management options (EXPERIMENTAL)" 855 856source "kernel/power/Kconfig" 857 858source "drivers/cpuidle/Kconfig" 859 860endmenu 861