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_NODE_MAP 12 select ARCH_DISCARD_MEMBLOCK 13 select HAVE_OPROFILE 14 select HAVE_GENERIC_DMA_COHERENT 15 select HAVE_ARCH_TRACEHOOK 16 select HAVE_PERF_EVENTS 17 select HAVE_DEBUG_BUGVERBOSE 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 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 STACKTRACE_SUPPORT 136 def_bool y 137 138config LOCKDEP_SUPPORT 139 def_bool y 140 141config ARCH_HAS_ILOG2_U32 142 def_bool n 143 144config ARCH_HAS_ILOG2_U64 145 def_bool n 146 147config NO_IOPORT_MAP 148 def_bool !PCI 149 depends on !SH_CAYMAN && !SH_SH4202_MICRODEV && !SH_SHMIN && \ 150 !SH_HP6XX && !SH_SOLUTION_ENGINE 151 152config IO_TRAPPED 153 bool 154 155config SWAP_IO_SPACE 156 bool 157 158config DMA_COHERENT 159 bool 160 161config DMA_NONCOHERENT 162 def_bool !DMA_COHERENT 163 select ARCH_HAS_SYNC_DMA_FOR_DEVICE 164 165config PGTABLE_LEVELS 166 default 3 if X2TLB 167 default 2 168 169menu "System type" 170 171# 172# Processor families 173# 174config CPU_SH2 175 bool 176 select SH_INTC 177 178config CPU_SH2A 179 bool 180 select CPU_SH2 181 select UNCACHED_MAPPING 182 183config CPU_J2 184 bool 185 select CPU_SH2 186 select OF 187 select OF_EARLY_FLATTREE 188 189config CPU_SH3 190 bool 191 select CPU_HAS_INTEVT 192 select CPU_HAS_SR_RB 193 select SH_INTC 194 select SYS_SUPPORTS_SH_TMU 195 196config CPU_SH4 197 bool 198 select CPU_HAS_INTEVT 199 select CPU_HAS_SR_RB 200 select CPU_HAS_FPU if !CPU_SH4AL_DSP 201 select SH_INTC 202 select SYS_SUPPORTS_SH_TMU 203 select SYS_SUPPORTS_HUGETLBFS if MMU 204 205config CPU_SH4A 206 bool 207 select CPU_SH4 208 209config CPU_SH4AL_DSP 210 bool 211 select CPU_SH4A 212 select CPU_HAS_DSP 213 214config CPU_SH5 215 bool 216 select CPU_HAS_FPU 217 select SYS_SUPPORTS_SH_TMU 218 select SYS_SUPPORTS_HUGETLBFS if MMU 219 220config CPU_SHX2 221 bool 222 223config CPU_SHX3 224 bool 225 select DMA_COHERENT 226 select SYS_SUPPORTS_SMP 227 select SYS_SUPPORTS_NUMA 228 229config ARCH_SHMOBILE 230 bool 231 select ARCH_SUSPEND_POSSIBLE 232 select PM 233 234config CPU_HAS_PMU 235 depends on CPU_SH4 || CPU_SH4A 236 default y 237 bool 238 239if SUPERH32 240 241choice 242 prompt "Processor sub-type selection" 243 244# 245# Processor subtypes 246# 247 248# SH-2 Processor Support 249 250config CPU_SUBTYPE_SH7619 251 bool "Support SH7619 processor" 252 select CPU_SH2 253 select SYS_SUPPORTS_SH_CMT 254 255config CPU_SUBTYPE_J2 256 bool "Support J2 processor" 257 select CPU_J2 258 select SYS_SUPPORTS_SMP 259 select GENERIC_CLOCKEVENTS_BROADCAST if SMP 260 261# SH-2A Processor Support 262 263config CPU_SUBTYPE_SH7201 264 bool "Support SH7201 processor" 265 select CPU_SH2A 266 select CPU_HAS_FPU 267 select SYS_SUPPORTS_SH_MTU2 268 269config CPU_SUBTYPE_SH7203 270 bool "Support SH7203 processor" 271 select CPU_SH2A 272 select CPU_HAS_FPU 273 select SYS_SUPPORTS_SH_CMT 274 select SYS_SUPPORTS_SH_MTU2 275 select PINCTRL 276 277config CPU_SUBTYPE_SH7206 278 bool "Support SH7206 processor" 279 select CPU_SH2A 280 select SYS_SUPPORTS_SH_CMT 281 select SYS_SUPPORTS_SH_MTU2 282 283config CPU_SUBTYPE_SH7263 284 bool "Support SH7263 processor" 285 select CPU_SH2A 286 select CPU_HAS_FPU 287 select SYS_SUPPORTS_SH_CMT 288 select SYS_SUPPORTS_SH_MTU2 289 290config CPU_SUBTYPE_SH7264 291 bool "Support SH7264 processor" 292 select CPU_SH2A 293 select CPU_HAS_FPU 294 select SYS_SUPPORTS_SH_CMT 295 select SYS_SUPPORTS_SH_MTU2 296 select PINCTRL 297 298config CPU_SUBTYPE_SH7269 299 bool "Support SH7269 processor" 300 select CPU_SH2A 301 select CPU_HAS_FPU 302 select SYS_SUPPORTS_SH_CMT 303 select SYS_SUPPORTS_SH_MTU2 304 select PINCTRL 305 306config CPU_SUBTYPE_MXG 307 bool "Support MX-G processor" 308 select CPU_SH2A 309 select SYS_SUPPORTS_SH_MTU2 310 help 311 Select MX-G if running on an R8A03022BG part. 312 313# SH-3 Processor Support 314 315config CPU_SUBTYPE_SH7705 316 bool "Support SH7705 processor" 317 select CPU_SH3 318 319config CPU_SUBTYPE_SH7706 320 bool "Support SH7706 processor" 321 select CPU_SH3 322 help 323 Select SH7706 if you have a 133 Mhz SH-3 HD6417706 CPU. 324 325config CPU_SUBTYPE_SH7707 326 bool "Support SH7707 processor" 327 select CPU_SH3 328 help 329 Select SH7707 if you have a 60 Mhz SH-3 HD6417707 CPU. 330 331config CPU_SUBTYPE_SH7708 332 bool "Support SH7708 processor" 333 select CPU_SH3 334 help 335 Select SH7708 if you have a 60 Mhz SH-3 HD6417708S or 336 if you have a 100 Mhz SH-3 HD6417708R CPU. 337 338config CPU_SUBTYPE_SH7709 339 bool "Support SH7709 processor" 340 select CPU_SH3 341 help 342 Select SH7709 if you have a 80 Mhz SH-3 HD6417709 CPU. 343 344config CPU_SUBTYPE_SH7710 345 bool "Support SH7710 processor" 346 select CPU_SH3 347 select CPU_HAS_DSP 348 help 349 Select SH7710 if you have a SH3-DSP SH7710 CPU. 350 351config CPU_SUBTYPE_SH7712 352 bool "Support SH7712 processor" 353 select CPU_SH3 354 select CPU_HAS_DSP 355 help 356 Select SH7712 if you have a SH3-DSP SH7712 CPU. 357 358config CPU_SUBTYPE_SH7720 359 bool "Support SH7720 processor" 360 select CPU_SH3 361 select CPU_HAS_DSP 362 select SYS_SUPPORTS_SH_CMT 363 select USB_OHCI_SH if USB_OHCI_HCD 364 select PINCTRL 365 help 366 Select SH7720 if you have a SH3-DSP SH7720 CPU. 367 368config CPU_SUBTYPE_SH7721 369 bool "Support SH7721 processor" 370 select CPU_SH3 371 select CPU_HAS_DSP 372 select SYS_SUPPORTS_SH_CMT 373 select USB_OHCI_SH if USB_OHCI_HCD 374 help 375 Select SH7721 if you have a SH3-DSP SH7721 CPU. 376 377# SH-4 Processor Support 378 379config CPU_SUBTYPE_SH7750 380 bool "Support SH7750 processor" 381 select CPU_SH4 382 help 383 Select SH7750 if you have a 200 Mhz SH-4 HD6417750 CPU. 384 385config CPU_SUBTYPE_SH7091 386 bool "Support SH7091 processor" 387 select CPU_SH4 388 help 389 Select SH7091 if you have an SH-4 based Sega device (such as 390 the Dreamcast, Naomi, and Naomi 2). 391 392config CPU_SUBTYPE_SH7750R 393 bool "Support SH7750R processor" 394 select CPU_SH4 395 396config CPU_SUBTYPE_SH7750S 397 bool "Support SH7750S processor" 398 select CPU_SH4 399 400config CPU_SUBTYPE_SH7751 401 bool "Support SH7751 processor" 402 select CPU_SH4 403 help 404 Select SH7751 if you have a 166 Mhz SH-4 HD6417751 CPU, 405 or if you have a HD6417751R CPU. 406 407config CPU_SUBTYPE_SH7751R 408 bool "Support SH7751R processor" 409 select CPU_SH4 410 411config CPU_SUBTYPE_SH7760 412 bool "Support SH7760 processor" 413 select CPU_SH4 414 415config CPU_SUBTYPE_SH4_202 416 bool "Support SH4-202 processor" 417 select CPU_SH4 418 419# SH-4A Processor Support 420 421config CPU_SUBTYPE_SH7723 422 bool "Support SH7723 processor" 423 select CPU_SH4A 424 select CPU_SHX2 425 select ARCH_SHMOBILE 426 select ARCH_SPARSEMEM_ENABLE 427 select SYS_SUPPORTS_SH_CMT 428 select PINCTRL 429 help 430 Select SH7723 if you have an SH-MobileR2 CPU. 431 432config CPU_SUBTYPE_SH7724 433 bool "Support SH7724 processor" 434 select CPU_SH4A 435 select CPU_SHX2 436 select ARCH_SHMOBILE 437 select ARCH_SPARSEMEM_ENABLE 438 select SYS_SUPPORTS_SH_CMT 439 select PINCTRL 440 help 441 Select SH7724 if you have an SH-MobileR2R CPU. 442 443config CPU_SUBTYPE_SH7734 444 bool "Support SH7734 processor" 445 select CPU_SH4A 446 select CPU_SHX2 447 select PINCTRL 448 help 449 Select SH7734 if you have a SH4A SH7734 CPU. 450 451config CPU_SUBTYPE_SH7757 452 bool "Support SH7757 processor" 453 select CPU_SH4A 454 select CPU_SHX2 455 select PINCTRL 456 help 457 Select SH7757 if you have a SH4A SH7757 CPU. 458 459config CPU_SUBTYPE_SH7763 460 bool "Support SH7763 processor" 461 select CPU_SH4A 462 select USB_OHCI_SH if USB_OHCI_HCD 463 help 464 Select SH7763 if you have a SH4A SH7763(R5S77631) CPU. 465 466config CPU_SUBTYPE_SH7770 467 bool "Support SH7770 processor" 468 select CPU_SH4A 469 470config CPU_SUBTYPE_SH7780 471 bool "Support SH7780 processor" 472 select CPU_SH4A 473 474config CPU_SUBTYPE_SH7785 475 bool "Support SH7785 processor" 476 select CPU_SH4A 477 select CPU_SHX2 478 select ARCH_SPARSEMEM_ENABLE 479 select SYS_SUPPORTS_NUMA 480 select PINCTRL 481 482config CPU_SUBTYPE_SH7786 483 bool "Support SH7786 processor" 484 select CPU_SH4A 485 select CPU_SHX3 486 select CPU_HAS_PTEAEX 487 select GENERIC_CLOCKEVENTS_BROADCAST if SMP 488 select USB_OHCI_SH if USB_OHCI_HCD 489 select USB_EHCI_SH if USB_EHCI_HCD 490 select PINCTRL 491 492config CPU_SUBTYPE_SHX3 493 bool "Support SH-X3 processor" 494 select CPU_SH4A 495 select CPU_SHX3 496 select GENERIC_CLOCKEVENTS_BROADCAST if SMP 497 select GPIOLIB 498 select PINCTRL 499 500# SH4AL-DSP Processor Support 501 502config CPU_SUBTYPE_SH7343 503 bool "Support SH7343 processor" 504 select CPU_SH4AL_DSP 505 select ARCH_SHMOBILE 506 select SYS_SUPPORTS_SH_CMT 507 508config CPU_SUBTYPE_SH7722 509 bool "Support SH7722 processor" 510 select CPU_SH4AL_DSP 511 select CPU_SHX2 512 select ARCH_SHMOBILE 513 select ARCH_SPARSEMEM_ENABLE 514 select SYS_SUPPORTS_NUMA 515 select SYS_SUPPORTS_SH_CMT 516 select PINCTRL 517 518config CPU_SUBTYPE_SH7366 519 bool "Support SH7366 processor" 520 select CPU_SH4AL_DSP 521 select CPU_SHX2 522 select ARCH_SHMOBILE 523 select ARCH_SPARSEMEM_ENABLE 524 select SYS_SUPPORTS_NUMA 525 select SYS_SUPPORTS_SH_CMT 526 527endchoice 528 529endif 530 531if SUPERH64 532 533choice 534 prompt "Processor sub-type selection" 535 536# SH-5 Processor Support 537 538config CPU_SUBTYPE_SH5_101 539 bool "Support SH5-101 processor" 540 select CPU_SH5 541 542config CPU_SUBTYPE_SH5_103 543 bool "Support SH5-103 processor" 544 select CPU_SH5 545 546endchoice 547 548endif 549 550source "arch/sh/mm/Kconfig" 551 552source "arch/sh/Kconfig.cpu" 553 554source "arch/sh/boards/Kconfig" 555 556menu "Timer and clock configuration" 557 558config SH_PCLK_FREQ 559 int "Peripheral clock frequency (in Hz)" 560 depends on SH_CLK_CPG_LEGACY 561 default "31250000" if CPU_SUBTYPE_SH7619 562 default "33333333" if CPU_SUBTYPE_SH7770 || \ 563 CPU_SUBTYPE_SH7760 || \ 564 CPU_SUBTYPE_SH7705 || \ 565 CPU_SUBTYPE_SH7203 || \ 566 CPU_SUBTYPE_SH7206 || \ 567 CPU_SUBTYPE_SH7263 || \ 568 CPU_SUBTYPE_MXG 569 default "60000000" if CPU_SUBTYPE_SH7751 || CPU_SUBTYPE_SH7751R 570 default "66000000" if CPU_SUBTYPE_SH4_202 571 default "50000000" 572 help 573 This option is used to specify the peripheral clock frequency. 574 This is necessary for determining the reference clock value on 575 platforms lacking an RTC. 576 577config SH_CLK_CPG 578 def_bool y 579 580config SH_CLK_CPG_LEGACY 581 depends on SH_CLK_CPG 582 def_bool y if !CPU_SUBTYPE_SH7785 && !ARCH_SHMOBILE && \ 583 !CPU_SHX3 && !CPU_SUBTYPE_SH7757 && \ 584 !CPU_SUBTYPE_SH7734 && !CPU_SUBTYPE_SH7264 && \ 585 !CPU_SUBTYPE_SH7269 586 587endmenu 588 589menu "CPU Frequency scaling" 590source "drivers/cpufreq/Kconfig" 591endmenu 592 593source "arch/sh/drivers/Kconfig" 594 595endmenu 596 597menu "Kernel features" 598 599source "kernel/Kconfig.hz" 600 601config KEXEC 602 bool "kexec system call (EXPERIMENTAL)" 603 depends on SUPERH32 && MMU 604 select KEXEC_CORE 605 help 606 kexec is a system call that implements the ability to shutdown your 607 current kernel, and to start another kernel. It is like a reboot 608 but it is independent of the system firmware. And like a reboot 609 you can start any kernel with it, not just Linux. 610 611 The name comes from the similarity to the exec system call. 612 613 It is an ongoing process to be certain the hardware in a machine 614 is properly shutdown, so do not be surprised if this code does not 615 initially work for you. As of this writing the exact hardware 616 interface is strongly in flux, so no good recommendation can be 617 made. 618 619config CRASH_DUMP 620 bool "kernel crash dumps (EXPERIMENTAL)" 621 depends on SUPERH32 && BROKEN_ON_SMP 622 help 623 Generate crash dump after being started by kexec. 624 This should be normally only set in special crash dump kernels 625 which are loaded in the main kernel with kexec-tools into 626 a specially reserved region and then later executed after 627 a crash by kdump/kexec. The crash dump kernel must be compiled 628 to a memory address not used by the main kernel using 629 PHYSICAL_START. 630 631 For more details see Documentation/kdump/kdump.txt 632 633config KEXEC_JUMP 634 bool "kexec jump (EXPERIMENTAL)" 635 depends on SUPERH32 && KEXEC && HIBERNATION 636 help 637 Jump between original kernel and kexeced kernel and invoke 638 code via KEXEC 639 640config PHYSICAL_START 641 hex "Physical address where the kernel is loaded" if (EXPERT || CRASH_DUMP) 642 default MEMORY_START 643 ---help--- 644 This gives the physical address where the kernel is loaded 645 and is ordinarily the same as MEMORY_START. 646 647 Different values are primarily used in the case of kexec on panic 648 where the fail safe kernel needs to run at a different address 649 than the panic-ed kernel. 650 651config SECCOMP 652 bool "Enable seccomp to safely compute untrusted bytecode" 653 depends on PROC_FS 654 help 655 This kernel feature is useful for number crunching applications 656 that may need to compute untrusted bytecode during their 657 execution. By using pipes or other transports made available to 658 the process as file descriptors supporting the read/write 659 syscalls, it's possible to isolate those applications in 660 their own address space using seccomp. Once seccomp is 661 enabled via prctl, it cannot be disabled and the task is only 662 allowed to execute a few safe syscalls defined by each seccomp 663 mode. 664 665 If unsure, say N. 666 667config SMP 668 bool "Symmetric multi-processing support" 669 depends on SYS_SUPPORTS_SMP 670 ---help--- 671 This enables support for systems with more than one CPU. If you have 672 a system with only one CPU, say N. If you have a system with more 673 than one CPU, say Y. 674 675 If you say N here, the kernel will run on uni- and multiprocessor 676 machines, but will use only one CPU of a multiprocessor machine. If 677 you say Y here, the kernel will run on many, but not all, 678 uniprocessor machines. On a uniprocessor machine, the kernel 679 will run faster if you say N here. 680 681 People using multiprocessor machines who say Y here should also say 682 Y to "Enhanced Real Time Clock Support", below. 683 684 See also <file:Documentation/lockup-watchdogs.txt> and the SMP-HOWTO 685 available at <http://www.tldp.org/docs.html#howto>. 686 687 If you don't know what to do here, say N. 688 689config NR_CPUS 690 int "Maximum number of CPUs (2-32)" 691 range 2 32 692 depends on SMP 693 default "4" if CPU_SUBTYPE_SHX3 694 default "2" 695 help 696 This allows you to specify the maximum number of CPUs which this 697 kernel will support. The maximum supported value is 32 and the 698 minimum value which makes sense is 2. 699 700 This is purely to save memory - each supported CPU adds 701 approximately eight kilobytes to the kernel image. 702 703config HOTPLUG_CPU 704 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)" 705 depends on SMP 706 help 707 Say Y here to experiment with turning CPUs off and on. CPUs 708 can be controlled through /sys/devices/system/cpu. 709 710config GUSA 711 def_bool y 712 depends on !SMP && SUPERH32 713 help 714 This enables support for gUSA (general UserSpace Atomicity). 715 This is the default implementation for both UP and non-ll/sc 716 CPUs, and is used by the libc, amongst others. 717 718 For additional information, design information can be found 719 in <http://lc.linux.or.jp/lc2002/papers/niibe0919p.pdf>. 720 721 This should only be disabled for special cases where alternate 722 atomicity implementations exist. 723 724config GUSA_RB 725 bool "Implement atomic operations by roll-back (gRB) (EXPERIMENTAL)" 726 depends on GUSA && CPU_SH3 || (CPU_SH4 && !CPU_SH4A) 727 help 728 Enabling this option will allow the kernel to implement some 729 atomic operations using a software implementation of load-locked/ 730 store-conditional (LLSC). On machines which do not have hardware 731 LLSC, this should be more efficient than the other alternative of 732 disabling interrupts around the atomic sequence. 733 734config HW_PERF_EVENTS 735 bool "Enable hardware performance counter support for perf events" 736 depends on PERF_EVENTS && CPU_HAS_PMU 737 default y 738 help 739 Enable hardware performance counter support for perf events. If 740 disabled, perf events will use software events only. 741 742source "drivers/sh/Kconfig" 743 744endmenu 745 746menu "Boot options" 747 748config USE_BUILTIN_DTB 749 bool "Use builtin DTB" 750 default n 751 depends on SH_DEVICE_TREE 752 help 753 Link a device tree blob for particular hardware into the kernel, 754 suppressing use of the DTB pointer provided by the bootloader. 755 This option should only be used with legacy bootloaders that are 756 not capable of providing a DTB to the kernel, or for experimental 757 hardware without stable device tree bindings. 758 759config BUILTIN_DTB_SOURCE 760 string "Source file for builtin DTB" 761 default "" 762 depends on USE_BUILTIN_DTB 763 help 764 Base name (without suffix, relative to arch/sh/boot/dts) for the 765 a DTS file that will be used to produce the DTB linked into the 766 kernel. 767 768config ZERO_PAGE_OFFSET 769 hex 770 default "0x00010000" if PAGE_SIZE_64KB || SH_RTS7751R2D || \ 771 SH_7751_SOLUTION_ENGINE 772 default "0x00004000" if PAGE_SIZE_16KB || SH_SH03 773 default "0x00002000" if PAGE_SIZE_8KB 774 default "0x00001000" 775 help 776 This sets the default offset of zero page. 777 778config BOOT_LINK_OFFSET 779 hex 780 default "0x00210000" if SH_SHMIN 781 default "0x00400000" if SH_CAYMAN 782 default "0x00810000" if SH_7780_SOLUTION_ENGINE 783 default "0x009e0000" if SH_TITAN 784 default "0x01800000" if SH_SDK7780 785 default "0x02000000" if SH_EDOSK7760 786 default "0x00800000" 787 help 788 This option allows you to set the link address offset of the zImage. 789 This can be useful if you are on a board which has a small amount of 790 memory. 791 792config ENTRY_OFFSET 793 hex 794 default "0x00001000" if PAGE_SIZE_4KB 795 default "0x00002000" if PAGE_SIZE_8KB 796 default "0x00004000" if PAGE_SIZE_16KB 797 default "0x00010000" if PAGE_SIZE_64KB 798 default "0x00000000" 799 800config ROMIMAGE_MMCIF 801 bool "Include MMCIF loader in romImage (EXPERIMENTAL)" 802 depends on CPU_SUBTYPE_SH7724 803 help 804 Say Y here to include experimental MMCIF loading code in 805 romImage. With this enabled it is possible to write the romImage 806 kernel image to an MMC card and boot the kernel straight from 807 the reset vector. At reset the processor Mask ROM will load the 808 first part of the romImage which in turn loads the rest the kernel 809 image to RAM using the MMCIF hardware block. 810 811choice 812 prompt "Kernel command line" 813 optional 814 default CMDLINE_OVERWRITE 815 help 816 Setting this option allows the kernel command line arguments 817 to be set. 818 819config CMDLINE_OVERWRITE 820 bool "Overwrite bootloader kernel arguments" 821 help 822 Given string will overwrite any arguments passed in by 823 a bootloader. 824 825config CMDLINE_EXTEND 826 bool "Extend bootloader kernel arguments" 827 help 828 Given string will be concatenated with arguments passed in 829 by a bootloader. 830 831endchoice 832 833config CMDLINE 834 string "Kernel command line arguments string" 835 depends on CMDLINE_OVERWRITE || CMDLINE_EXTEND 836 default "console=ttySC1,115200" 837 838endmenu 839 840menu "Bus options" 841 842config SUPERHYWAY 843 tristate "SuperHyway Bus support" 844 depends on CPU_SUBTYPE_SH4_202 845 846config MAPLE 847 bool "Maple Bus support" 848 depends on SH_DREAMCAST 849 help 850 The Maple Bus is SEGA's serial communication bus for peripherals 851 on the Dreamcast. Without this bus support you won't be able to 852 get your Dreamcast keyboard etc to work, so most users 853 probably want to say 'Y' here, unless you are only using the 854 Dreamcast with a serial line terminal or a remote network 855 connection. 856 857endmenu 858 859menu "Power management options (EXPERIMENTAL)" 860 861source "kernel/power/Kconfig" 862 863source "drivers/cpuidle/Kconfig" 864 865endmenu 866