1
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 ARCH_NO_COHERENT_DMA_MMAP if !MMU
9 select HAVE_PATA_PLATFORM
10 select CLKDEV_LOOKUP
11 select DMA_DECLARE_COHERENT
12 select HAVE_IDE if HAS_IOPORT_MAP
13 select HAVE_MEMBLOCK_NODE_MAP
14 select HAVE_OPROFILE
15 select HAVE_ARCH_TRACEHOOK
16 select HAVE_PERF_EVENTS
17 select HAVE_DEBUG_BUGVERBOSE
18 select HAVE_FAST_GUP if MMU
19 select ARCH_HAVE_CUSTOM_GPIO_H
20 select ARCH_HAVE_NMI_SAFE_CMPXCHG if (GUSA_RB || CPU_SH4A)
21 select ARCH_HAS_GCOV_PROFILE_ALL
22 select PERF_USE_VMALLOC
23 select HAVE_DEBUG_KMEMLEAK
24 select HAVE_KERNEL_GZIP
25 select CPU_NO_EFFICIENT_FFS
26 select HAVE_KERNEL_BZIP2
27 select HAVE_KERNEL_LZMA
28 select HAVE_KERNEL_XZ
29 select HAVE_KERNEL_LZO
30 select HAVE_UID16
31 select ARCH_WANT_IPC_PARSE_VERSION
32 select HAVE_SYSCALL_TRACEPOINTS
33 select HAVE_REGS_AND_STACK_ACCESS_API
34 select MAY_HAVE_SPARSE_IRQ
35 select IRQ_FORCED_THREADING
36 select RTC_LIB
37 select GENERIC_ATOMIC64
38 select GENERIC_IRQ_SHOW
39 select GENERIC_SMP_IDLE_THREAD
40 select GENERIC_IDLE_POLL_SETUP
41 select GENERIC_CLOCKEVENTS
42 select GENERIC_CMOS_UPDATE if SH_SH03 || SH_DREAMCAST
43 select GENERIC_PCI_IOMAP if PCI
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 NO_GENERIC_PCI_IOPORT_MAP if PCI
50 select OLD_SIGSUSPEND
51 select OLD_SIGACTION
52 select PCI_DOMAINS if PCI
53 select HAVE_ARCH_AUDITSYSCALL
54 select HAVE_FUTEX_CMPXCHG if FUTEX
55 select HAVE_NMI
56 select NEED_SG_DMA_LENGTH
57 select ARCH_HAS_GIGANTIC_PAGE
58
59 help
60 The SuperH is a RISC processor targeted for use in embedded systems
61 and consumer electronics; it was also used in the Sega Dreamcast
62 gaming console. The SuperH port has a home page at
63 <http://www.linux-sh.org/>.
64
65config SUPERH32
66 def_bool "$(ARCH)" = "sh"
67 select ARCH_32BIT_OFF_T
68 select GUP_GET_PTE_LOW_HIGH if X2TLB
69 select HAVE_KPROBES
70 select HAVE_KRETPROBES
71 select HAVE_IOREMAP_PROT if MMU && !X2TLB
72 select HAVE_FUNCTION_TRACER
73 select HAVE_FTRACE_MCOUNT_RECORD
74 select HAVE_DYNAMIC_FTRACE
75 select HAVE_FTRACE_NMI_ENTER if DYNAMIC_FTRACE
76 select ARCH_WANT_IPC_PARSE_VERSION
77 select HAVE_FUNCTION_GRAPH_TRACER
78 select HAVE_ARCH_KGDB
79 select HAVE_HW_BREAKPOINT
80 select HAVE_MIXED_BREAKPOINTS_REGS
81 select PERF_EVENTS
82 select ARCH_HIBERNATION_POSSIBLE if MMU
83 select SPARSE_IRQ
84 select HAVE_STACKPROTECTOR
85
86config SUPERH64
87 def_bool "$(ARCH)" = "sh64"
88 select HAVE_EXIT_THREAD
89 select KALLSYMS
90
91config ARCH_DEFCONFIG
92 string
93 default "arch/sh/configs/shx3_defconfig" if SUPERH32
94 default "arch/sh/configs/cayman_defconfig" if SUPERH64
95
96config GENERIC_BUG
97 def_bool y
98 depends on BUG && SUPERH32
99
100config GENERIC_CSUM
101 def_bool y
102 depends on SUPERH64
103
104config GENERIC_HWEIGHT
105 def_bool y
106
107config GENERIC_CALIBRATE_DELAY
108 bool
109
110config GENERIC_LOCKBREAK
111 def_bool y
112 depends on SMP && PREEMPT
113
114config ARCH_SUSPEND_POSSIBLE
115 def_bool n
116
117config ARCH_HIBERNATION_POSSIBLE
118 def_bool n
119
120config SYS_SUPPORTS_APM_EMULATION
121 bool
122 select ARCH_SUSPEND_POSSIBLE
123
124config SYS_SUPPORTS_HUGETLBFS
125 bool
126
127config SYS_SUPPORTS_SMP
128 bool
129
130config SYS_SUPPORTS_NUMA
131 bool
132
133config STACKTRACE_SUPPORT
134 def_bool y
135
136config LOCKDEP_SUPPORT
137 def_bool y
138
139config ARCH_HAS_ILOG2_U32
140 def_bool n
141
142config ARCH_HAS_ILOG2_U64
143 def_bool n
144
145config NO_IOPORT_MAP
146 def_bool !PCI
147 depends on !SH_CAYMAN && !SH_SH4202_MICRODEV && !SH_SHMIN && \
148 !SH_HP6XX && !SH_SOLUTION_ENGINE
149
150config IO_TRAPPED
151 bool
152
153config SWAP_IO_SPACE
154 bool
155
156config DMA_COHERENT
157 bool
158
159config DMA_NONCOHERENT
160 def_bool !DMA_COHERENT
161 select ARCH_HAS_SYNC_DMA_FOR_DEVICE
162
163config PGTABLE_LEVELS
164 default 3 if X2TLB
165 default 2
166
167menu "System type"
168
169
170
171
172config CPU_SH2
173 bool
174 select SH_INTC
175
176config CPU_SH2A
177 bool
178 select CPU_SH2
179 select UNCACHED_MAPPING
180
181config CPU_J2
182 bool
183 select CPU_SH2
184 select OF
185 select OF_EARLY_FLATTREE
186
187config CPU_SH3
188 bool
189 select CPU_HAS_INTEVT
190 select CPU_HAS_SR_RB
191 select SH_INTC
192 select SYS_SUPPORTS_SH_TMU
193
194config CPU_SH4
195 bool
196 select CPU_HAS_INTEVT
197 select CPU_HAS_SR_RB
198 select CPU_HAS_FPU if !CPU_SH4AL_DSP
199 select SH_INTC
200 select SYS_SUPPORTS_SH_TMU
201 select SYS_SUPPORTS_HUGETLBFS if MMU
202
203config CPU_SH4A
204 bool
205 select CPU_SH4
206
207config CPU_SH4AL_DSP
208 bool
209 select CPU_SH4A
210 select CPU_HAS_DSP
211
212config CPU_SH5
213 bool
214 select CPU_HAS_FPU
215 select SYS_SUPPORTS_SH_TMU
216 select SYS_SUPPORTS_HUGETLBFS if MMU
217
218config CPU_SHX2
219 bool
220
221config CPU_SHX3
222 bool
223 select DMA_COHERENT
224 select SYS_SUPPORTS_SMP
225 select SYS_SUPPORTS_NUMA
226
227config ARCH_SHMOBILE
228 bool
229 select ARCH_SUSPEND_POSSIBLE
230 select PM
231
232config CPU_HAS_PMU
233 depends on CPU_SH4 || CPU_SH4A
234 default y
235 bool
236
237if SUPERH32
238
239choice
240 prompt "Processor sub-type selection"
241
242
243
244
245
246
247
248config CPU_SUBTYPE_SH7619
249 bool "Support SH7619 processor"
250 select CPU_SH2
251 select SYS_SUPPORTS_SH_CMT
252
253config CPU_SUBTYPE_J2
254 bool "Support J2 processor"
255 select CPU_J2
256 select SYS_SUPPORTS_SMP
257 select GENERIC_CLOCKEVENTS_BROADCAST if SMP
258
259
260
261config CPU_SUBTYPE_SH7201
262 bool "Support SH7201 processor"
263 select CPU_SH2A
264 select CPU_HAS_FPU
265 select SYS_SUPPORTS_SH_MTU2
266
267config CPU_SUBTYPE_SH7203
268 bool "Support SH7203 processor"
269 select CPU_SH2A
270 select CPU_HAS_FPU
271 select SYS_SUPPORTS_SH_CMT
272 select SYS_SUPPORTS_SH_MTU2
273 select PINCTRL
274
275config CPU_SUBTYPE_SH7206
276 bool "Support SH7206 processor"
277 select CPU_SH2A
278 select SYS_SUPPORTS_SH_CMT
279 select SYS_SUPPORTS_SH_MTU2
280
281config CPU_SUBTYPE_SH7263
282 bool "Support SH7263 processor"
283 select CPU_SH2A
284 select CPU_HAS_FPU
285 select SYS_SUPPORTS_SH_CMT
286 select SYS_SUPPORTS_SH_MTU2
287
288config CPU_SUBTYPE_SH7264
289 bool "Support SH7264 processor"
290 select CPU_SH2A
291 select CPU_HAS_FPU
292 select SYS_SUPPORTS_SH_CMT
293 select SYS_SUPPORTS_SH_MTU2
294 select PINCTRL
295
296config CPU_SUBTYPE_SH7269
297 bool "Support SH7269 processor"
298 select CPU_SH2A
299 select CPU_HAS_FPU
300 select SYS_SUPPORTS_SH_CMT
301 select SYS_SUPPORTS_SH_MTU2
302 select PINCTRL
303
304config CPU_SUBTYPE_MXG
305 bool "Support MX-G processor"
306 select CPU_SH2A
307 select SYS_SUPPORTS_SH_MTU2
308 help
309 Select MX-G if running on an R8A03022BG part.
310
311
312
313config CPU_SUBTYPE_SH7705
314 bool "Support SH7705 processor"
315 select CPU_SH3
316
317config CPU_SUBTYPE_SH7706
318 bool "Support SH7706 processor"
319 select CPU_SH3
320 help
321 Select SH7706 if you have a 133 Mhz SH-3 HD6417706 CPU.
322
323config CPU_SUBTYPE_SH7707
324 bool "Support SH7707 processor"
325 select CPU_SH3
326 help
327 Select SH7707 if you have a 60 Mhz SH-3 HD6417707 CPU.
328
329config CPU_SUBTYPE_SH7708
330 bool "Support SH7708 processor"
331 select CPU_SH3
332 help
333 Select SH7708 if you have a 60 Mhz SH-3 HD6417708S or
334 if you have a 100 Mhz SH-3 HD6417708R CPU.
335
336config CPU_SUBTYPE_SH7709
337 bool "Support SH7709 processor"
338 select CPU_SH3
339 help
340 Select SH7709 if you have a 80 Mhz SH-3 HD6417709 CPU.
341
342config CPU_SUBTYPE_SH7710
343 bool "Support SH7710 processor"
344 select CPU_SH3
345 select CPU_HAS_DSP
346 help
347 Select SH7710 if you have a SH3-DSP SH7710 CPU.
348
349config CPU_SUBTYPE_SH7712
350 bool "Support SH7712 processor"
351 select CPU_SH3
352 select CPU_HAS_DSP
353 help
354 Select SH7712 if you have a SH3-DSP SH7712 CPU.
355
356config CPU_SUBTYPE_SH7720
357 bool "Support SH7720 processor"
358 select CPU_SH3
359 select CPU_HAS_DSP
360 select SYS_SUPPORTS_SH_CMT
361 select USB_OHCI_SH if USB_OHCI_HCD
362 select PINCTRL
363 help
364 Select SH7720 if you have a SH3-DSP SH7720 CPU.
365
366config CPU_SUBTYPE_SH7721
367 bool "Support SH7721 processor"
368 select CPU_SH3
369 select CPU_HAS_DSP
370 select SYS_SUPPORTS_SH_CMT
371 select USB_OHCI_SH if USB_OHCI_HCD
372 help
373 Select SH7721 if you have a SH3-DSP SH7721 CPU.
374
375
376
377config CPU_SUBTYPE_SH7750
378 bool "Support SH7750 processor"
379 select CPU_SH4
380 help
381 Select SH7750 if you have a 200 Mhz SH-4 HD6417750 CPU.
382
383config CPU_SUBTYPE_SH7091
384 bool "Support SH7091 processor"
385 select CPU_SH4
386 help
387 Select SH7091 if you have an SH-4 based Sega device (such as
388 the Dreamcast, Naomi, and Naomi 2).
389
390config CPU_SUBTYPE_SH7750R
391 bool "Support SH7750R processor"
392 select CPU_SH4
393
394config CPU_SUBTYPE_SH7750S
395 bool "Support SH7750S processor"
396 select CPU_SH4
397
398config CPU_SUBTYPE_SH7751
399 bool "Support SH7751 processor"
400 select CPU_SH4
401 help
402 Select SH7751 if you have a 166 Mhz SH-4 HD6417751 CPU,
403 or if you have a HD6417751R CPU.
404
405config CPU_SUBTYPE_SH7751R
406 bool "Support SH7751R processor"
407 select CPU_SH4
408
409config CPU_SUBTYPE_SH7760
410 bool "Support SH7760 processor"
411 select CPU_SH4
412
413config CPU_SUBTYPE_SH4_202
414 bool "Support SH4-202 processor"
415 select CPU_SH4
416
417
418
419config CPU_SUBTYPE_SH7723
420 bool "Support SH7723 processor"
421 select CPU_SH4A
422 select CPU_SHX2
423 select ARCH_SHMOBILE
424 select ARCH_SPARSEMEM_ENABLE
425 select SYS_SUPPORTS_SH_CMT
426 select PINCTRL
427 help
428 Select SH7723 if you have an SH-MobileR2 CPU.
429
430config CPU_SUBTYPE_SH7724
431 bool "Support SH7724 processor"
432 select CPU_SH4A
433 select CPU_SHX2
434 select ARCH_SHMOBILE
435 select ARCH_SPARSEMEM_ENABLE
436 select SYS_SUPPORTS_SH_CMT
437 select PINCTRL
438 help
439 Select SH7724 if you have an SH-MobileR2R CPU.
440
441config CPU_SUBTYPE_SH7734
442 bool "Support SH7734 processor"
443 select CPU_SH4A
444 select CPU_SHX2
445 select PINCTRL
446 help
447 Select SH7734 if you have a SH4A SH7734 CPU.
448
449config CPU_SUBTYPE_SH7757
450 bool "Support SH7757 processor"
451 select CPU_SH4A
452 select CPU_SHX2
453 select PINCTRL
454 help
455 Select SH7757 if you have a SH4A SH7757 CPU.
456
457config CPU_SUBTYPE_SH7763
458 bool "Support SH7763 processor"
459 select CPU_SH4A
460 select USB_OHCI_SH if USB_OHCI_HCD
461 help
462 Select SH7763 if you have a SH4A SH7763(R5S77631) CPU.
463
464config CPU_SUBTYPE_SH7770
465 bool "Support SH7770 processor"
466 select CPU_SH4A
467
468config CPU_SUBTYPE_SH7780
469 bool "Support SH7780 processor"
470 select CPU_SH4A
471
472config CPU_SUBTYPE_SH7785
473 bool "Support SH7785 processor"
474 select CPU_SH4A
475 select CPU_SHX2
476 select ARCH_SPARSEMEM_ENABLE
477 select SYS_SUPPORTS_NUMA
478 select PINCTRL
479
480config CPU_SUBTYPE_SH7786
481 bool "Support SH7786 processor"
482 select CPU_SH4A
483 select CPU_SHX3
484 select CPU_HAS_PTEAEX
485 select GENERIC_CLOCKEVENTS_BROADCAST if SMP
486 select USB_OHCI_SH if USB_OHCI_HCD
487 select USB_EHCI_SH if USB_EHCI_HCD
488 select PINCTRL
489
490config CPU_SUBTYPE_SHX3
491 bool "Support SH-X3 processor"
492 select CPU_SH4A
493 select CPU_SHX3
494 select GENERIC_CLOCKEVENTS_BROADCAST if SMP
495 select GPIOLIB
496 select PINCTRL
497
498
499
500config CPU_SUBTYPE_SH7343
501 bool "Support SH7343 processor"
502 select CPU_SH4AL_DSP
503 select ARCH_SHMOBILE
504 select SYS_SUPPORTS_SH_CMT
505
506config CPU_SUBTYPE_SH7722
507 bool "Support SH7722 processor"
508 select CPU_SH4AL_DSP
509 select CPU_SHX2
510 select ARCH_SHMOBILE
511 select ARCH_SPARSEMEM_ENABLE
512 select SYS_SUPPORTS_NUMA
513 select SYS_SUPPORTS_SH_CMT
514 select PINCTRL
515
516config CPU_SUBTYPE_SH7366
517 bool "Support SH7366 processor"
518 select CPU_SH4AL_DSP
519 select CPU_SHX2
520 select ARCH_SHMOBILE
521 select ARCH_SPARSEMEM_ENABLE
522 select SYS_SUPPORTS_NUMA
523 select SYS_SUPPORTS_SH_CMT
524
525endchoice
526
527endif
528
529if SUPERH64
530
531choice
532 prompt "Processor sub-type selection"
533
534
535
536config CPU_SUBTYPE_SH5_101
537 bool "Support SH5-101 processor"
538 select CPU_SH5
539
540config CPU_SUBTYPE_SH5_103
541 bool "Support SH5-103 processor"
542 select CPU_SH5
543
544endchoice
545
546endif
547
548source "arch/sh/mm/Kconfig"
549
550source "arch/sh/Kconfig.cpu"
551
552source "arch/sh/boards/Kconfig"
553
554menu "Timer and clock configuration"
555
556config SH_PCLK_FREQ
557 int "Peripheral clock frequency (in Hz)"
558 depends on SH_CLK_CPG_LEGACY
559 default "31250000" if CPU_SUBTYPE_SH7619
560 default "33333333" if CPU_SUBTYPE_SH7770 || \
561 CPU_SUBTYPE_SH7760 || \
562 CPU_SUBTYPE_SH7705 || \
563 CPU_SUBTYPE_SH7203 || \
564 CPU_SUBTYPE_SH7206 || \
565 CPU_SUBTYPE_SH7263 || \
566 CPU_SUBTYPE_MXG
567 default "60000000" if CPU_SUBTYPE_SH7751 || CPU_SUBTYPE_SH7751R
568 default "66000000" if CPU_SUBTYPE_SH4_202
569 default "50000000"
570 help
571 This option is used to specify the peripheral clock frequency.
572 This is necessary for determining the reference clock value on
573 platforms lacking an RTC.
574
575config SH_CLK_CPG
576 def_bool y
577
578config SH_CLK_CPG_LEGACY
579 depends on SH_CLK_CPG
580 def_bool y if !CPU_SUBTYPE_SH7785 && !ARCH_SHMOBILE && \
581 !CPU_SHX3 && !CPU_SUBTYPE_SH7757 && \
582 !CPU_SUBTYPE_SH7734 && !CPU_SUBTYPE_SH7264 && \
583 !CPU_SUBTYPE_SH7269
584
585endmenu
586
587menu "CPU Frequency scaling"
588source "drivers/cpufreq/Kconfig"
589endmenu
590
591source "arch/sh/drivers/Kconfig"
592
593endmenu
594
595menu "Kernel features"
596
597source "kernel/Kconfig.hz"
598
599config KEXEC
600 bool "kexec system call (EXPERIMENTAL)"
601 depends on SUPERH32 && MMU
602 select KEXEC_CORE
603 help
604 kexec is a system call that implements the ability to shutdown your
605 current kernel, and to start another kernel. It is like a reboot
606 but it is independent of the system firmware. And like a reboot
607 you can start any kernel with it, not just Linux.
608
609 The name comes from the similarity to the exec system call.
610
611 It is an ongoing process to be certain the hardware in a machine
612 is properly shutdown, so do not be surprised if this code does not
613 initially work for you. As of this writing the exact hardware
614 interface is strongly in flux, so no good recommendation can be
615 made.
616
617config CRASH_DUMP
618 bool "kernel crash dumps (EXPERIMENTAL)"
619 depends on SUPERH32 && BROKEN_ON_SMP
620 help
621 Generate crash dump after being started by kexec.
622 This should be normally only set in special crash dump kernels
623 which are loaded in the main kernel with kexec-tools into
624 a specially reserved region and then later executed after
625 a crash by kdump/kexec. The crash dump kernel must be compiled
626 to a memory address not used by the main kernel using
627 PHYSICAL_START.
628
629 For more details see Documentation/admin-guide/kdump/kdump.rst
630
631config KEXEC_JUMP
632 bool "kexec jump (EXPERIMENTAL)"
633 depends on SUPERH32 && KEXEC && HIBERNATION
634 help
635 Jump between original kernel and kexeced kernel and invoke
636 code via KEXEC
637
638config PHYSICAL_START
639 hex "Physical address where the kernel is loaded" if (EXPERT || CRASH_DUMP)
640 default MEMORY_START
641 ---help---
642 This gives the physical address where the kernel is loaded
643 and is ordinarily the same as MEMORY_START.
644
645 Different values are primarily used in the case of kexec on panic
646 where the fail safe kernel needs to run at a different address
647 than the panic-ed kernel.
648
649config SECCOMP
650 bool "Enable seccomp to safely compute untrusted bytecode"
651 depends on PROC_FS
652 help
653 This kernel feature is useful for number crunching applications
654 that may need to compute untrusted bytecode during their
655 execution. By using pipes or other transports made available to
656 the process as file descriptors supporting the read/write
657 syscalls, it's possible to isolate those applications in
658 their own address space using seccomp. Once seccomp is
659 enabled via prctl, it cannot be disabled and the task is only
660 allowed to execute a few safe syscalls defined by each seccomp
661 mode.
662
663 If unsure, say N.
664
665config SMP
666 bool "Symmetric multi-processing support"
667 depends on SYS_SUPPORTS_SMP
668 ---help---
669 This enables support for systems with more than one CPU. If you have
670 a system with only one CPU, say N. If you have a system with more
671 than one CPU, say Y.
672
673 If you say N here, the kernel will run on uni- and multiprocessor
674 machines, but will use only one CPU of a multiprocessor machine. If
675 you say Y here, the kernel will run on many, but not all,
676 uniprocessor machines. On a uniprocessor machine, the kernel
677 will run faster if you say N here.
678
679 People using multiprocessor machines who say Y here should also say
680 Y to "Enhanced Real Time Clock Support", below.
681
682 See also <file:Documentation/admin-guide/lockup-watchdogs.rst> and the SMP-HOWTO
683 available at <http://www.tldp.org/docs.html
684
685 If you don't know what to do here, say N.
686
687config NR_CPUS
688 int "Maximum number of CPUs (2-32)"
689 range 2 32
690 depends on SMP
691 default "4" if CPU_SUBTYPE_SHX3
692 default "2"
693 help
694 This allows you to specify the maximum number of CPUs which this
695 kernel will support. The maximum supported value is 32 and the
696 minimum value which makes sense is 2.
697
698 This is purely to save memory - each supported CPU adds
699 approximately eight kilobytes to the kernel image.
700
701config HOTPLUG_CPU
702 bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
703 depends on SMP
704 help
705 Say Y here to experiment with turning CPUs off and on. CPUs
706 can be controlled through /sys/devices/system/cpu.
707
708config GUSA
709 def_bool y
710 depends on !SMP && SUPERH32
711 help
712 This enables support for gUSA (general UserSpace Atomicity).
713 This is the default implementation for both UP and non-ll/sc
714 CPUs, and is used by the libc, amongst others.
715
716 For additional information, design information can be found
717 in <http://lc.linux.or.jp/lc2002/papers/niibe0919p.pdf>.
718
719 This should only be disabled for special cases where alternate
720 atomicity implementations exist.
721
722config GUSA_RB
723 bool "Implement atomic operations by roll-back (gRB) (EXPERIMENTAL)"
724 depends on GUSA && CPU_SH3 || (CPU_SH4 && !CPU_SH4A)
725 help
726 Enabling this option will allow the kernel to implement some
727 atomic operations using a software implementation of load-locked/
728 store-conditional (LLSC). On machines which do not have hardware
729 LLSC, this should be more efficient than the other alternative of
730 disabling interrupts around the atomic sequence.
731
732config HW_PERF_EVENTS
733 bool "Enable hardware performance counter support for perf events"
734 depends on PERF_EVENTS && CPU_HAS_PMU
735 default y
736 help
737 Enable hardware performance counter support for perf events. If
738 disabled, perf events will use software events only.
739
740source "drivers/sh/Kconfig"
741
742endmenu
743
744menu "Boot options"
745
746config USE_BUILTIN_DTB
747 bool "Use builtin DTB"
748 default n
749 depends on SH_DEVICE_TREE
750 help
751 Link a device tree blob for particular hardware into the kernel,
752 suppressing use of the DTB pointer provided by the bootloader.
753 This option should only be used with legacy bootloaders that are
754 not capable of providing a DTB to the kernel, or for experimental
755 hardware without stable device tree bindings.
756
757config BUILTIN_DTB_SOURCE
758 string "Source file for builtin DTB"
759 default ""
760 depends on USE_BUILTIN_DTB
761 help
762 Base name (without suffix, relative to arch/sh/boot/dts) for the
763 a DTS file that will be used to produce the DTB linked into the
764 kernel.
765
766config ZERO_PAGE_OFFSET
767 hex
768 default "0x00010000" if PAGE_SIZE_64KB || SH_RTS7751R2D || \
769 SH_7751_SOLUTION_ENGINE
770 default "0x00004000" if PAGE_SIZE_16KB || SH_SH03
771 default "0x00002000" if PAGE_SIZE_8KB
772 default "0x00001000"
773 help
774 This sets the default offset of zero page.
775
776config BOOT_LINK_OFFSET
777 hex
778 default "0x00210000" if SH_SHMIN
779 default "0x00400000" if SH_CAYMAN
780 default "0x00810000" if SH_7780_SOLUTION_ENGINE
781 default "0x009e0000" if SH_TITAN
782 default "0x01800000" if SH_SDK7780
783 default "0x02000000" if SH_EDOSK7760
784 default "0x00800000"
785 help
786 This option allows you to set the link address offset of the zImage.
787 This can be useful if you are on a board which has a small amount of
788 memory.
789
790config ENTRY_OFFSET
791 hex
792 default "0x00001000" if PAGE_SIZE_4KB
793 default "0x00002000" if PAGE_SIZE_8KB
794 default "0x00004000" if PAGE_SIZE_16KB
795 default "0x00010000" if PAGE_SIZE_64KB
796 default "0x00000000"
797
798config ROMIMAGE_MMCIF
799 bool "Include MMCIF loader in romImage (EXPERIMENTAL)"
800 depends on CPU_SUBTYPE_SH7724
801 help
802 Say Y here to include experimental MMCIF loading code in
803 romImage. With this enabled it is possible to write the romImage
804 kernel image to an MMC card and boot the kernel straight from
805 the reset vector. At reset the processor Mask ROM will load the
806 first part of the romImage which in turn loads the rest the kernel
807 image to RAM using the MMCIF hardware block.
808
809choice
810 prompt "Kernel command line"
811 optional
812 default CMDLINE_OVERWRITE
813 help
814 Setting this option allows the kernel command line arguments
815 to be set.
816
817config CMDLINE_OVERWRITE
818 bool "Overwrite bootloader kernel arguments"
819 help
820 Given string will overwrite any arguments passed in by
821 a bootloader.
822
823config CMDLINE_EXTEND
824 bool "Extend bootloader kernel arguments"
825 help
826 Given string will be concatenated with arguments passed in
827 by a bootloader.
828
829endchoice
830
831config CMDLINE
832 string "Kernel command line arguments string"
833 depends on CMDLINE_OVERWRITE || CMDLINE_EXTEND
834 default "console=ttySC1,115200"
835
836endmenu
837
838menu "Bus options"
839
840config SUPERHYWAY
841 tristate "SuperHyway Bus support"
842 depends on CPU_SUBTYPE_SH4_202
843
844config MAPLE
845 bool "Maple Bus support"
846 depends on SH_DREAMCAST
847 help
848 The Maple Bus is SEGA's serial communication bus for peripherals
849 on the Dreamcast. Without this bus support you won't be able to
850 get your Dreamcast keyboard etc to work, so most users
851 probably want to say 'Y' here, unless you are only using the
852 Dreamcast with a serial line terminal or a remote network
853 connection.
854
855endmenu
856
857menu "Power management options (EXPERIMENTAL)"
858
859source "kernel/power/Kconfig"
860
861source "drivers/cpuidle/Kconfig"
862
863endmenu
864
