xref: /openbmc/linux/arch/sh/Kconfig (revision 1804569d)
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 ARCH_DISCARD_MEMBLOCK
14	select HAVE_OPROFILE
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 "$(ARCH)" = "sh"
65	select ARCH_32BIT_OFF_T
66	select HAVE_KPROBES
67	select HAVE_KRETPROBES
68	select HAVE_IOREMAP_PROT if MMU && !X2TLB
69	select HAVE_FUNCTION_TRACER
70	select HAVE_FTRACE_MCOUNT_RECORD
71	select HAVE_DYNAMIC_FTRACE
72	select HAVE_FTRACE_NMI_ENTER if DYNAMIC_FTRACE
73	select ARCH_WANT_IPC_PARSE_VERSION
74	select HAVE_FUNCTION_GRAPH_TRACER
75	select HAVE_ARCH_KGDB
76	select HAVE_HW_BREAKPOINT
77	select HAVE_MIXED_BREAKPOINTS_REGS
78	select PERF_EVENTS
79	select ARCH_HIBERNATION_POSSIBLE if MMU
80	select SPARSE_IRQ
81	select HAVE_STACKPROTECTOR
82
83config SUPERH64
84	def_bool "$(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 RWSEM_GENERIC_SPINLOCK
94	def_bool y
95
96config RWSEM_XCHGADD_ALGORITHM
97	bool
98
99config GENERIC_BUG
100	def_bool y
101	depends on BUG && SUPERH32
102
103config GENERIC_CSUM
104	def_bool y
105	depends on SUPERH64
106
107config GENERIC_HWEIGHT
108	def_bool y
109
110config GENERIC_CALIBRATE_DELAY
111	bool
112
113config GENERIC_LOCKBREAK
114	def_bool y
115	depends on SMP && PREEMPT
116
117config ARCH_SUSPEND_POSSIBLE
118	def_bool n
119
120config ARCH_HIBERNATION_POSSIBLE
121	def_bool n
122
123config SYS_SUPPORTS_APM_EMULATION
124	bool
125	select ARCH_SUSPEND_POSSIBLE
126
127config SYS_SUPPORTS_HUGETLBFS
128	bool
129
130config SYS_SUPPORTS_SMP
131	bool
132
133config SYS_SUPPORTS_NUMA
134	bool
135
136config STACKTRACE_SUPPORT
137	def_bool y
138
139config LOCKDEP_SUPPORT
140	def_bool y
141
142config ARCH_HAS_ILOG2_U32
143	def_bool n
144
145config ARCH_HAS_ILOG2_U64
146	def_bool n
147
148config NO_IOPORT_MAP
149	def_bool !PCI
150	depends on !SH_CAYMAN && !SH_SH4202_MICRODEV && !SH_SHMIN && \
151		   !SH_HP6XX && !SH_SOLUTION_ENGINE
152
153config IO_TRAPPED
154	bool
155
156config SWAP_IO_SPACE
157	bool
158
159config DMA_COHERENT
160	bool
161
162config DMA_NONCOHERENT
163	def_bool !DMA_COHERENT
164	select ARCH_HAS_SYNC_DMA_FOR_DEVICE
165
166config PGTABLE_LEVELS
167	default 3 if X2TLB
168	default 2
169
170menu "System type"
171
172#
173# Processor families
174#
175config CPU_SH2
176	bool
177	select SH_INTC
178
179config CPU_SH2A
180	bool
181	select CPU_SH2
182	select UNCACHED_MAPPING
183
184config CPU_J2
185	bool
186	select CPU_SH2
187	select OF
188	select OF_EARLY_FLATTREE
189
190config CPU_SH3
191	bool
192	select CPU_HAS_INTEVT
193	select CPU_HAS_SR_RB
194	select SH_INTC
195	select SYS_SUPPORTS_SH_TMU
196
197config CPU_SH4
198	bool
199	select CPU_HAS_INTEVT
200	select CPU_HAS_SR_RB
201	select CPU_HAS_FPU if !CPU_SH4AL_DSP
202	select SH_INTC
203	select SYS_SUPPORTS_SH_TMU
204	select SYS_SUPPORTS_HUGETLBFS if MMU
205
206config CPU_SH4A
207	bool
208	select CPU_SH4
209
210config CPU_SH4AL_DSP
211	bool
212	select CPU_SH4A
213	select CPU_HAS_DSP
214
215config CPU_SH5
216	bool
217	select CPU_HAS_FPU
218	select SYS_SUPPORTS_SH_TMU
219	select SYS_SUPPORTS_HUGETLBFS if MMU
220
221config CPU_SHX2
222	bool
223
224config CPU_SHX3
225	bool
226	select DMA_COHERENT
227	select SYS_SUPPORTS_SMP
228	select SYS_SUPPORTS_NUMA
229
230config ARCH_SHMOBILE
231	bool
232	select ARCH_SUSPEND_POSSIBLE
233	select PM
234
235config CPU_HAS_PMU
236       depends on CPU_SH4 || CPU_SH4A
237       default y
238       bool
239
240if SUPERH32
241
242choice
243	prompt "Processor sub-type selection"
244
245#
246# Processor subtypes
247#
248
249# SH-2 Processor Support
250
251config CPU_SUBTYPE_SH7619
252	bool "Support SH7619 processor"
253	select CPU_SH2
254	select SYS_SUPPORTS_SH_CMT
255
256config CPU_SUBTYPE_J2
257	bool "Support J2 processor"
258	select CPU_J2
259	select SYS_SUPPORTS_SMP
260	select GENERIC_CLOCKEVENTS_BROADCAST if SMP
261
262# SH-2A Processor Support
263
264config CPU_SUBTYPE_SH7201
265	bool "Support SH7201 processor"
266	select CPU_SH2A
267	select CPU_HAS_FPU
268	select SYS_SUPPORTS_SH_MTU2
269
270config CPU_SUBTYPE_SH7203
271	bool "Support SH7203 processor"
272	select CPU_SH2A
273	select CPU_HAS_FPU
274	select SYS_SUPPORTS_SH_CMT
275	select SYS_SUPPORTS_SH_MTU2
276	select PINCTRL
277
278config CPU_SUBTYPE_SH7206
279	bool "Support SH7206 processor"
280	select CPU_SH2A
281	select SYS_SUPPORTS_SH_CMT
282	select SYS_SUPPORTS_SH_MTU2
283
284config CPU_SUBTYPE_SH7263
285	bool "Support SH7263 processor"
286	select CPU_SH2A
287	select CPU_HAS_FPU
288	select SYS_SUPPORTS_SH_CMT
289	select SYS_SUPPORTS_SH_MTU2
290
291config CPU_SUBTYPE_SH7264
292	bool "Support SH7264 processor"
293	select CPU_SH2A
294	select CPU_HAS_FPU
295	select SYS_SUPPORTS_SH_CMT
296	select SYS_SUPPORTS_SH_MTU2
297	select PINCTRL
298
299config CPU_SUBTYPE_SH7269
300	bool "Support SH7269 processor"
301	select CPU_SH2A
302	select CPU_HAS_FPU
303	select SYS_SUPPORTS_SH_CMT
304	select SYS_SUPPORTS_SH_MTU2
305	select PINCTRL
306
307config CPU_SUBTYPE_MXG
308	bool "Support MX-G processor"
309	select CPU_SH2A
310	select SYS_SUPPORTS_SH_MTU2
311	help
312	  Select MX-G if running on an R8A03022BG part.
313
314# SH-3 Processor Support
315
316config CPU_SUBTYPE_SH7705
317	bool "Support SH7705 processor"
318	select CPU_SH3
319
320config CPU_SUBTYPE_SH7706
321	bool "Support SH7706 processor"
322	select CPU_SH3
323	help
324	  Select SH7706 if you have a 133 Mhz SH-3 HD6417706 CPU.
325
326config CPU_SUBTYPE_SH7707
327	bool "Support SH7707 processor"
328	select CPU_SH3
329	help
330	  Select SH7707 if you have a  60 Mhz SH-3 HD6417707 CPU.
331
332config CPU_SUBTYPE_SH7708
333	bool "Support SH7708 processor"
334	select CPU_SH3
335	help
336	  Select SH7708 if you have a  60 Mhz SH-3 HD6417708S or
337	  if you have a 100 Mhz SH-3 HD6417708R CPU.
338
339config CPU_SUBTYPE_SH7709
340	bool "Support SH7709 processor"
341	select CPU_SH3
342	help
343	  Select SH7709 if you have a  80 Mhz SH-3 HD6417709 CPU.
344
345config CPU_SUBTYPE_SH7710
346	bool "Support SH7710 processor"
347	select CPU_SH3
348	select CPU_HAS_DSP
349	help
350	  Select SH7710 if you have a SH3-DSP SH7710 CPU.
351
352config CPU_SUBTYPE_SH7712
353	bool "Support SH7712 processor"
354	select CPU_SH3
355	select CPU_HAS_DSP
356	help
357	  Select SH7712 if you have a SH3-DSP SH7712 CPU.
358
359config CPU_SUBTYPE_SH7720
360	bool "Support SH7720 processor"
361	select CPU_SH3
362	select CPU_HAS_DSP
363	select SYS_SUPPORTS_SH_CMT
364	select USB_OHCI_SH if USB_OHCI_HCD
365	select PINCTRL
366	help
367	  Select SH7720 if you have a SH3-DSP SH7720 CPU.
368
369config CPU_SUBTYPE_SH7721
370	bool "Support SH7721 processor"
371	select CPU_SH3
372	select CPU_HAS_DSP
373	select SYS_SUPPORTS_SH_CMT
374	select USB_OHCI_SH if USB_OHCI_HCD
375	help
376	  Select SH7721 if you have a SH3-DSP SH7721 CPU.
377
378# SH-4 Processor Support
379
380config CPU_SUBTYPE_SH7750
381	bool "Support SH7750 processor"
382	select CPU_SH4
383	help
384	  Select SH7750 if you have a 200 Mhz SH-4 HD6417750 CPU.
385
386config CPU_SUBTYPE_SH7091
387	bool "Support SH7091 processor"
388	select CPU_SH4
389	help
390	  Select SH7091 if you have an SH-4 based Sega device (such as
391	  the Dreamcast, Naomi, and Naomi 2).
392
393config CPU_SUBTYPE_SH7750R
394	bool "Support SH7750R processor"
395	select CPU_SH4
396
397config CPU_SUBTYPE_SH7750S
398	bool "Support SH7750S processor"
399	select CPU_SH4
400
401config CPU_SUBTYPE_SH7751
402	bool "Support SH7751 processor"
403	select CPU_SH4
404	help
405	  Select SH7751 if you have a 166 Mhz SH-4 HD6417751 CPU,
406	  or if you have a HD6417751R CPU.
407
408config CPU_SUBTYPE_SH7751R
409	bool "Support SH7751R processor"
410	select CPU_SH4
411
412config CPU_SUBTYPE_SH7760
413	bool "Support SH7760 processor"
414	select CPU_SH4
415
416config CPU_SUBTYPE_SH4_202
417	bool "Support SH4-202 processor"
418	select CPU_SH4
419
420# SH-4A Processor Support
421
422config CPU_SUBTYPE_SH7723
423	bool "Support SH7723 processor"
424	select CPU_SH4A
425	select CPU_SHX2
426	select ARCH_SHMOBILE
427	select ARCH_SPARSEMEM_ENABLE
428	select SYS_SUPPORTS_SH_CMT
429	select PINCTRL
430	help
431	  Select SH7723 if you have an SH-MobileR2 CPU.
432
433config CPU_SUBTYPE_SH7724
434	bool "Support SH7724 processor"
435	select CPU_SH4A
436	select CPU_SHX2
437	select ARCH_SHMOBILE
438	select ARCH_SPARSEMEM_ENABLE
439	select SYS_SUPPORTS_SH_CMT
440	select PINCTRL
441	help
442	  Select SH7724 if you have an SH-MobileR2R CPU.
443
444config CPU_SUBTYPE_SH7734
445	bool "Support SH7734 processor"
446	select CPU_SH4A
447	select CPU_SHX2
448	select PINCTRL
449	help
450	  Select SH7734 if you have a SH4A SH7734 CPU.
451
452config CPU_SUBTYPE_SH7757
453	bool "Support SH7757 processor"
454	select CPU_SH4A
455	select CPU_SHX2
456	select PINCTRL
457	help
458	  Select SH7757 if you have a SH4A SH7757 CPU.
459
460config CPU_SUBTYPE_SH7763
461	bool "Support SH7763 processor"
462	select CPU_SH4A
463	select USB_OHCI_SH if USB_OHCI_HCD
464	help
465	  Select SH7763 if you have a SH4A SH7763(R5S77631) CPU.
466
467config CPU_SUBTYPE_SH7770
468	bool "Support SH7770 processor"
469	select CPU_SH4A
470
471config CPU_SUBTYPE_SH7780
472	bool "Support SH7780 processor"
473	select CPU_SH4A
474
475config CPU_SUBTYPE_SH7785
476	bool "Support SH7785 processor"
477	select CPU_SH4A
478	select CPU_SHX2
479	select ARCH_SPARSEMEM_ENABLE
480	select SYS_SUPPORTS_NUMA
481	select PINCTRL
482
483config CPU_SUBTYPE_SH7786
484	bool "Support SH7786 processor"
485	select CPU_SH4A
486	select CPU_SHX3
487	select CPU_HAS_PTEAEX
488	select GENERIC_CLOCKEVENTS_BROADCAST if SMP
489	select USB_OHCI_SH if USB_OHCI_HCD
490	select USB_EHCI_SH if USB_EHCI_HCD
491	select PINCTRL
492
493config CPU_SUBTYPE_SHX3
494	bool "Support SH-X3 processor"
495	select CPU_SH4A
496	select CPU_SHX3
497	select GENERIC_CLOCKEVENTS_BROADCAST if SMP
498	select GPIOLIB
499	select PINCTRL
500
501# SH4AL-DSP Processor Support
502
503config CPU_SUBTYPE_SH7343
504	bool "Support SH7343 processor"
505	select CPU_SH4AL_DSP
506	select ARCH_SHMOBILE
507	select SYS_SUPPORTS_SH_CMT
508
509config CPU_SUBTYPE_SH7722
510	bool "Support SH7722 processor"
511	select CPU_SH4AL_DSP
512	select CPU_SHX2
513	select ARCH_SHMOBILE
514	select ARCH_SPARSEMEM_ENABLE
515	select SYS_SUPPORTS_NUMA
516	select SYS_SUPPORTS_SH_CMT
517	select PINCTRL
518
519config CPU_SUBTYPE_SH7366
520	bool "Support SH7366 processor"
521	select CPU_SH4AL_DSP
522	select CPU_SHX2
523	select ARCH_SHMOBILE
524	select ARCH_SPARSEMEM_ENABLE
525	select SYS_SUPPORTS_NUMA
526	select SYS_SUPPORTS_SH_CMT
527
528endchoice
529
530endif
531
532if SUPERH64
533
534choice
535	prompt "Processor sub-type selection"
536
537# SH-5 Processor Support
538
539config CPU_SUBTYPE_SH5_101
540	bool "Support SH5-101 processor"
541	select CPU_SH5
542
543config CPU_SUBTYPE_SH5_103
544	bool "Support SH5-103 processor"
545	select CPU_SH5
546
547endchoice
548
549endif
550
551source "arch/sh/mm/Kconfig"
552
553source "arch/sh/Kconfig.cpu"
554
555source "arch/sh/boards/Kconfig"
556
557menu "Timer and clock configuration"
558
559config SH_PCLK_FREQ
560	int "Peripheral clock frequency (in Hz)"
561	depends on SH_CLK_CPG_LEGACY
562	default "31250000" if CPU_SUBTYPE_SH7619
563	default "33333333" if CPU_SUBTYPE_SH7770 || \
564			      CPU_SUBTYPE_SH7760 || \
565			      CPU_SUBTYPE_SH7705 || \
566			      CPU_SUBTYPE_SH7203 || \
567			      CPU_SUBTYPE_SH7206 || \
568			      CPU_SUBTYPE_SH7263 || \
569			      CPU_SUBTYPE_MXG
570	default "60000000" if CPU_SUBTYPE_SH7751 || CPU_SUBTYPE_SH7751R
571	default "66000000" if CPU_SUBTYPE_SH4_202
572	default "50000000"
573	help
574	  This option is used to specify the peripheral clock frequency.
575	  This is necessary for determining the reference clock value on
576	  platforms lacking an RTC.
577
578config SH_CLK_CPG
579	def_bool y
580
581config SH_CLK_CPG_LEGACY
582	depends on SH_CLK_CPG
583	def_bool y if !CPU_SUBTYPE_SH7785 && !ARCH_SHMOBILE && \
584		      !CPU_SHX3 && !CPU_SUBTYPE_SH7757 && \
585		      !CPU_SUBTYPE_SH7734 && !CPU_SUBTYPE_SH7264 && \
586		      !CPU_SUBTYPE_SH7269
587
588endmenu
589
590menu "CPU Frequency scaling"
591source "drivers/cpufreq/Kconfig"
592endmenu
593
594source "arch/sh/drivers/Kconfig"
595
596endmenu
597
598menu "Kernel features"
599
600source "kernel/Kconfig.hz"
601
602config KEXEC
603	bool "kexec system call (EXPERIMENTAL)"
604	depends on SUPERH32 && MMU
605	select KEXEC_CORE
606	help
607	  kexec is a system call that implements the ability to shutdown your
608	  current kernel, and to start another kernel.  It is like a reboot
609	  but it is independent of the system firmware.  And like a reboot
610	  you can start any kernel with it, not just Linux.
611
612	  The name comes from the similarity to the exec system call.
613
614	  It is an ongoing process to be certain the hardware in a machine
615	  is properly shutdown, so do not be surprised if this code does not
616	  initially work for you.  As of this writing the exact hardware
617	  interface is strongly in flux, so no good recommendation can be
618	  made.
619
620config CRASH_DUMP
621	bool "kernel crash dumps (EXPERIMENTAL)"
622	depends on SUPERH32 && BROKEN_ON_SMP
623	help
624	  Generate crash dump after being started by kexec.
625	  This should be normally only set in special crash dump kernels
626	  which are loaded in the main kernel with kexec-tools into
627	  a specially reserved region and then later executed after
628	  a crash by kdump/kexec. The crash dump kernel must be compiled
629	  to a memory address not used by the main kernel using
630	  PHYSICAL_START.
631
632	  For more details see Documentation/kdump/kdump.txt
633
634config KEXEC_JUMP
635	bool "kexec jump (EXPERIMENTAL)"
636	depends on SUPERH32 && KEXEC && HIBERNATION
637	help
638	  Jump between original kernel and kexeced kernel and invoke
639	  code via KEXEC
640
641config PHYSICAL_START
642	hex "Physical address where the kernel is loaded" if (EXPERT || CRASH_DUMP)
643	default MEMORY_START
644	---help---
645	  This gives the physical address where the kernel is loaded
646	  and is ordinarily the same as MEMORY_START.
647
648	  Different values are primarily used in the case of kexec on panic
649	  where the fail safe kernel needs to run at a different address
650	  than the panic-ed kernel.
651
652config SECCOMP
653	bool "Enable seccomp to safely compute untrusted bytecode"
654	depends on PROC_FS
655	help
656	  This kernel feature is useful for number crunching applications
657	  that may need to compute untrusted bytecode during their
658	  execution. By using pipes or other transports made available to
659	  the process as file descriptors supporting the read/write
660	  syscalls, it's possible to isolate those applications in
661	  their own address space using seccomp. Once seccomp is
662	  enabled via prctl, it cannot be disabled and the task is only
663	  allowed to execute a few safe syscalls defined by each seccomp
664	  mode.
665
666	  If unsure, say N.
667
668config SMP
669	bool "Symmetric multi-processing support"
670	depends on SYS_SUPPORTS_SMP
671	---help---
672	  This enables support for systems with more than one CPU. If you have
673	  a system with only one CPU, say N. If you have a system with more
674	  than one CPU, say Y.
675
676	  If you say N here, the kernel will run on uni- and multiprocessor
677	  machines, but will use only one CPU of a multiprocessor machine. If
678	  you say Y here, the kernel will run on many, but not all,
679	  uniprocessor machines. On a uniprocessor machine, the kernel
680	  will run faster if you say N here.
681
682	  People using multiprocessor machines who say Y here should also say
683	  Y to "Enhanced Real Time Clock Support", below.
684
685	  See also <file:Documentation/lockup-watchdogs.txt> and the SMP-HOWTO
686	  available at <http://www.tldp.org/docs.html#howto>.
687
688	  If you don't know what to do here, say N.
689
690config NR_CPUS
691	int "Maximum number of CPUs (2-32)"
692	range 2 32
693	depends on SMP
694	default "4" if CPU_SUBTYPE_SHX3
695	default "2"
696	help
697	  This allows you to specify the maximum number of CPUs which this
698	  kernel will support.  The maximum supported value is 32 and the
699	  minimum value which makes sense is 2.
700
701	  This is purely to save memory - each supported CPU adds
702	  approximately eight kilobytes to the kernel image.
703
704config HOTPLUG_CPU
705	bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
706	depends on SMP
707	help
708	  Say Y here to experiment with turning CPUs off and on.  CPUs
709	  can be controlled through /sys/devices/system/cpu.
710
711config GUSA
712	def_bool y
713	depends on !SMP && SUPERH32
714	help
715	  This enables support for gUSA (general UserSpace Atomicity).
716	  This is the default implementation for both UP and non-ll/sc
717	  CPUs, and is used by the libc, amongst others.
718
719	  For additional information, design information can be found
720	  in <http://lc.linux.or.jp/lc2002/papers/niibe0919p.pdf>.
721
722	  This should only be disabled for special cases where alternate
723	  atomicity implementations exist.
724
725config GUSA_RB
726	bool "Implement atomic operations by roll-back (gRB) (EXPERIMENTAL)"
727	depends on GUSA && CPU_SH3 || (CPU_SH4 && !CPU_SH4A)
728	help
729	  Enabling this option will allow the kernel to implement some
730	  atomic operations using a software implementation of load-locked/
731	  store-conditional (LLSC). On machines which do not have hardware
732	  LLSC, this should be more efficient than the other alternative of
733	  disabling interrupts around the atomic sequence.
734
735config HW_PERF_EVENTS
736	bool "Enable hardware performance counter support for perf events"
737	depends on PERF_EVENTS && CPU_HAS_PMU
738	default y
739	help
740	  Enable hardware performance counter support for perf events. If
741	  disabled, perf events will use software events only.
742
743source "drivers/sh/Kconfig"
744
745endmenu
746
747menu "Boot options"
748
749config USE_BUILTIN_DTB
750	bool "Use builtin DTB"
751	default n
752	depends on SH_DEVICE_TREE
753	help
754	  Link a device tree blob for particular hardware into the kernel,
755	  suppressing use of the DTB pointer provided by the bootloader.
756	  This option should only be used with legacy bootloaders that are
757	  not capable of providing a DTB to the kernel, or for experimental
758	  hardware without stable device tree bindings.
759
760config BUILTIN_DTB_SOURCE
761	string "Source file for builtin DTB"
762	default ""
763	depends on USE_BUILTIN_DTB
764	help
765	  Base name (without suffix, relative to arch/sh/boot/dts) for the
766	  a DTS file that will be used to produce the DTB linked into the
767	  kernel.
768
769config ZERO_PAGE_OFFSET
770	hex
771	default "0x00010000" if PAGE_SIZE_64KB || SH_RTS7751R2D || \
772				SH_7751_SOLUTION_ENGINE
773	default "0x00004000" if PAGE_SIZE_16KB || SH_SH03
774	default "0x00002000" if PAGE_SIZE_8KB
775	default "0x00001000"
776	help
777	  This sets the default offset of zero page.
778
779config BOOT_LINK_OFFSET
780	hex
781	default "0x00210000" if SH_SHMIN
782	default "0x00400000" if SH_CAYMAN
783	default "0x00810000" if SH_7780_SOLUTION_ENGINE
784	default "0x009e0000" if SH_TITAN
785	default "0x01800000" if SH_SDK7780
786	default "0x02000000" if SH_EDOSK7760
787	default "0x00800000"
788	help
789	  This option allows you to set the link address offset of the zImage.
790	  This can be useful if you are on a board which has a small amount of
791	  memory.
792
793config ENTRY_OFFSET
794	hex
795	default "0x00001000" if PAGE_SIZE_4KB
796	default "0x00002000" if PAGE_SIZE_8KB
797	default "0x00004000" if PAGE_SIZE_16KB
798	default "0x00010000" if PAGE_SIZE_64KB
799	default "0x00000000"
800
801config ROMIMAGE_MMCIF
802	bool "Include MMCIF loader in romImage (EXPERIMENTAL)"
803	depends on CPU_SUBTYPE_SH7724
804	help
805	  Say Y here to include experimental MMCIF loading code in
806	  romImage. With this enabled it is possible to write the romImage
807	  kernel image to an MMC card and boot the kernel straight from
808	  the reset vector. At reset the processor Mask ROM will load the
809	  first part of the romImage which in turn loads the rest the kernel
810	  image to RAM using the MMCIF hardware block.
811
812choice
813	prompt "Kernel command line"
814	optional
815	default CMDLINE_OVERWRITE
816	help
817	  Setting this option allows the kernel command line arguments
818	  to be set.
819
820config CMDLINE_OVERWRITE
821	bool "Overwrite bootloader kernel arguments"
822	help
823	  Given string will overwrite any arguments passed in by
824	  a bootloader.
825
826config CMDLINE_EXTEND
827	bool "Extend bootloader kernel arguments"
828	help
829	  Given string will be concatenated with arguments passed in
830	  by a bootloader.
831
832endchoice
833
834config CMDLINE
835	string "Kernel command line arguments string"
836	depends on CMDLINE_OVERWRITE || CMDLINE_EXTEND
837	default "console=ttySC1,115200"
838
839endmenu
840
841menu "Bus options"
842
843config SUPERHYWAY
844	tristate "SuperHyway Bus support"
845	depends on CPU_SUBTYPE_SH4_202
846
847config MAPLE
848	bool "Maple Bus support"
849	depends on SH_DREAMCAST
850	help
851	 The Maple Bus is SEGA's serial communication bus for peripherals
852	 on the Dreamcast. Without this bus support you won't be able to
853	 get your Dreamcast keyboard etc to work, so most users
854	 probably want to say 'Y' here, unless you are only using the
855	 Dreamcast with a serial line terminal or a remote network
856	 connection.
857
858endmenu
859
860menu "Power management options (EXPERIMENTAL)"
861
862source "kernel/power/Kconfig"
863
864source "drivers/cpuidle/Kconfig"
865
866endmenu
867