xref: /linux/arch/sh/Kconfig (revision c81a748e)
1# SPDX-License-Identifier: GPL-2.0
2config SUPERH
3	def_bool y
4	select ARCH_32BIT_OFF_T
5	select ARCH_HAS_CPU_CACHE_ALIASING
6	select ARCH_HAVE_NMI_SAFE_CMPXCHG if (GUSA_RB || CPU_SH4A)
7	select ARCH_HAS_BINFMT_FLAT if !MMU
8	select ARCH_HAS_CPU_FINALIZE_INIT
9	select ARCH_HAS_CURRENT_STACK_POINTER
10	select ARCH_HAS_GIGANTIC_PAGE
11	select ARCH_HAS_GCOV_PROFILE_ALL
12	select ARCH_HAS_PTE_SPECIAL
13	select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
14	select ARCH_HIBERNATION_POSSIBLE if MMU
15	select ARCH_MIGHT_HAVE_PC_PARPORT
16	select ARCH_WANT_IPC_PARSE_VERSION
17	select ARCH_NEED_CMPXCHG_1_EMU
18	select CPU_NO_EFFICIENT_FFS
19	select DMA_DECLARE_COHERENT
20	select GENERIC_ATOMIC64
21	select GENERIC_CMOS_UPDATE if SH_SH03 || SH_DREAMCAST
22	select GENERIC_IDLE_POLL_SETUP
23	select GENERIC_IRQ_SHOW
24	select GENERIC_LIB_ASHLDI3
25	select GENERIC_LIB_ASHRDI3
26	select GENERIC_LIB_LSHRDI3
27	select GENERIC_PCI_IOMAP if PCI
28	select GENERIC_SCHED_CLOCK
29	select GENERIC_SMP_IDLE_THREAD
30	select GUP_GET_PXX_LOW_HIGH if X2TLB
31	select HAS_IOPORT if HAS_IOPORT_MAP
32	select GENERIC_IOREMAP if MMU
33	select HAVE_ARCH_AUDITSYSCALL
34	select HAVE_ARCH_KGDB
35	select HAVE_ARCH_SECCOMP_FILTER
36	select HAVE_ARCH_TRACEHOOK
37	select HAVE_DEBUG_BUGVERBOSE
38	select HAVE_DEBUG_KMEMLEAK
39	select HAVE_DYNAMIC_FTRACE
40	select HAVE_GUP_FAST if MMU
41	select HAVE_FUNCTION_GRAPH_TRACER
42	select HAVE_FUNCTION_TRACER
43	select HAVE_FTRACE_MCOUNT_RECORD
44	select HAVE_HW_BREAKPOINT
45	select HAVE_IOREMAP_PROT if MMU && !X2TLB
46	select HAVE_KERNEL_BZIP2
47	select HAVE_KERNEL_GZIP
48	select HAVE_KERNEL_LZMA
49	select HAVE_KERNEL_LZO
50	select HAVE_KERNEL_XZ
51	select HAVE_KPROBES
52	select HAVE_KRETPROBES
53	select HAVE_MIXED_BREAKPOINTS_REGS
54	select HAVE_MOD_ARCH_SPECIFIC if DWARF_UNWINDER
55	select HAVE_NMI
56	select HAVE_PATA_PLATFORM
57	select HAVE_PERF_EVENTS
58	select HAVE_REGS_AND_STACK_ACCESS_API
59	select HAVE_UID16
60	select HAVE_SOFTIRQ_ON_OWN_STACK if IRQSTACKS
61	select HAVE_STACKPROTECTOR
62	select HAVE_SYSCALL_TRACEPOINTS
63	select IRQ_FORCED_THREADING
64	select LOCK_MM_AND_FIND_VMA
65	select MODULES_USE_ELF_RELA
66	select NEED_SG_DMA_LENGTH
67	select NO_DMA if !MMU && !DMA_COHERENT
68	select NO_GENERIC_PCI_IOPORT_MAP if PCI
69	select OLD_SIGACTION
70	select OLD_SIGSUSPEND
71	select PCI_DOMAINS if PCI
72	select PERF_EVENTS
73	select PERF_USE_VMALLOC
74	select RTC_LIB
75	select SPARSE_IRQ
76	select TRACE_IRQFLAGS_SUPPORT
77	help
78	  The SuperH is a RISC processor targeted for use in embedded systems
79	  and consumer electronics; it was also used in the Sega Dreamcast
80	  gaming console.  The SuperH port has a home page at
81	  <http://www.linux-sh.org/>.
82
83config GENERIC_BUG
84	def_bool y
85	depends on BUG
86
87config GENERIC_HWEIGHT
88	def_bool y
89
90config GENERIC_CALIBRATE_DELAY
91	bool
92
93config GENERIC_LOCKBREAK
94	def_bool y
95	depends on SMP && PREEMPTION
96
97config ARCH_SUSPEND_POSSIBLE
98	def_bool n
99
100config ARCH_HIBERNATION_POSSIBLE
101	def_bool n
102
103config SYS_SUPPORTS_APM_EMULATION
104	bool
105	select ARCH_SUSPEND_POSSIBLE
106
107config SYS_SUPPORTS_SMP
108	bool
109
110config SYS_SUPPORTS_NUMA
111	bool
112
113config STACKTRACE_SUPPORT
114	def_bool y
115
116config LOCKDEP_SUPPORT
117	def_bool y
118
119config ARCH_HAS_ILOG2_U32
120	def_bool n
121
122config ARCH_HAS_ILOG2_U64
123	def_bool n
124
125config NO_IOPORT_MAP
126	def_bool !PCI
127	depends on !SH_SHMIN && !SH_HP6XX && !SH_SOLUTION_ENGINE && \
128		   !SH_DREAMCAST
129
130config IO_TRAPPED
131	bool
132
133config SWAP_IO_SPACE
134	bool
135
136config DMA_COHERENT
137	bool
138
139config DMA_NONCOHERENT
140	def_bool !NO_DMA && !DMA_COHERENT
141	select ARCH_HAS_DMA_PREP_COHERENT
142	select ARCH_HAS_SYNC_DMA_FOR_DEVICE
143	select DMA_DIRECT_REMAP
144
145config PGTABLE_LEVELS
146	default 3 if X2TLB
147	default 2
148
149menu "System type"
150
151#
152# Processor families
153#
154config CPU_SH2
155	bool
156	select SH_INTC
157
158config CPU_SH2A
159	bool
160	select CPU_SH2
161	select UNCACHED_MAPPING
162
163config CPU_J2
164	bool
165	select CPU_SH2
166	select OF
167	select OF_EARLY_FLATTREE
168
169config CPU_SH3
170	bool
171	select CPU_HAS_INTEVT
172	select CPU_HAS_SR_RB
173	select SH_INTC
174	select SYS_SUPPORTS_SH_TMU
175
176config CPU_SH4
177	bool
178	select ARCH_SUPPORTS_HUGETLBFS if MMU
179	select CPU_HAS_INTEVT
180	select CPU_HAS_SR_RB
181	select CPU_HAS_FPU if !CPU_SH4AL_DSP
182	select SH_INTC
183	select SYS_SUPPORTS_SH_TMU
184
185config CPU_SH4A
186	bool
187	select CPU_SH4
188
189config CPU_SH4AL_DSP
190	bool
191	select CPU_SH4A
192	select CPU_HAS_DSP
193
194config CPU_SHX2
195	bool
196
197config CPU_SHX3
198	bool
199	select DMA_COHERENT
200	select SYS_SUPPORTS_SMP
201	select SYS_SUPPORTS_NUMA
202
203config ARCH_SHMOBILE
204	bool
205	select ARCH_SUSPEND_POSSIBLE
206	select PM
207
208config CPU_HAS_PMU
209       depends on CPU_SH4 || CPU_SH4A
210       default y
211       bool
212
213choice
214	prompt "Processor sub-type selection"
215
216#
217# Processor subtypes
218#
219
220# SH-2 Processor Support
221
222config CPU_SUBTYPE_SH7619
223	bool "Support SH7619 processor"
224	select CPU_SH2
225	select SYS_SUPPORTS_SH_CMT
226
227config CPU_SUBTYPE_J2
228	bool "Support J2 processor"
229	select CPU_J2
230	select SYS_SUPPORTS_SMP
231	select GENERIC_CLOCKEVENTS_BROADCAST if SMP
232
233# SH-2A Processor Support
234
235config CPU_SUBTYPE_SH7201
236	bool "Support SH7201 processor"
237	select CPU_SH2A
238	select CPU_HAS_FPU
239	select SYS_SUPPORTS_SH_MTU2
240
241config CPU_SUBTYPE_SH7203
242	bool "Support SH7203 processor"
243	select CPU_SH2A
244	select CPU_HAS_FPU
245	select SYS_SUPPORTS_SH_CMT
246	select SYS_SUPPORTS_SH_MTU2
247	select PINCTRL
248
249config CPU_SUBTYPE_SH7206
250	bool "Support SH7206 processor"
251	select CPU_SH2A
252	select SYS_SUPPORTS_SH_CMT
253	select SYS_SUPPORTS_SH_MTU2
254
255config CPU_SUBTYPE_SH7263
256	bool "Support SH7263 processor"
257	select CPU_SH2A
258	select CPU_HAS_FPU
259	select SYS_SUPPORTS_SH_CMT
260	select SYS_SUPPORTS_SH_MTU2
261
262config CPU_SUBTYPE_SH7264
263	bool "Support SH7264 processor"
264	select CPU_SH2A
265	select CPU_HAS_FPU
266	select SYS_SUPPORTS_SH_CMT
267	select SYS_SUPPORTS_SH_MTU2
268	select PINCTRL
269
270config CPU_SUBTYPE_SH7269
271	bool "Support SH7269 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_MXG
279	bool "Support MX-G processor"
280	select CPU_SH2A
281	select SYS_SUPPORTS_SH_MTU2
282	help
283	  Select MX-G if running on an R8A03022BG part.
284
285# SH-3 Processor Support
286
287config CPU_SUBTYPE_SH7705
288	bool "Support SH7705 processor"
289	select CPU_SH3
290
291config CPU_SUBTYPE_SH7706
292	bool "Support SH7706 processor"
293	select CPU_SH3
294	help
295	  Select SH7706 if you have a 133 Mhz SH-3 HD6417706 CPU.
296
297config CPU_SUBTYPE_SH7707
298	bool "Support SH7707 processor"
299	select CPU_SH3
300	help
301	  Select SH7707 if you have a  60 Mhz SH-3 HD6417707 CPU.
302
303config CPU_SUBTYPE_SH7708
304	bool "Support SH7708 processor"
305	select CPU_SH3
306	help
307	  Select SH7708 if you have a  60 Mhz SH-3 HD6417708S or
308	  if you have a 100 Mhz SH-3 HD6417708R CPU.
309
310config CPU_SUBTYPE_SH7709
311	bool "Support SH7709 processor"
312	select CPU_SH3
313	help
314	  Select SH7709 if you have a  80 Mhz SH-3 HD6417709 CPU.
315
316config CPU_SUBTYPE_SH7710
317	bool "Support SH7710 processor"
318	select CPU_SH3
319	select CPU_HAS_DSP
320	help
321	  Select SH7710 if you have a SH3-DSP SH7710 CPU.
322
323config CPU_SUBTYPE_SH7712
324	bool "Support SH7712 processor"
325	select CPU_SH3
326	select CPU_HAS_DSP
327	help
328	  Select SH7712 if you have a SH3-DSP SH7712 CPU.
329
330config CPU_SUBTYPE_SH7720
331	bool "Support SH7720 processor"
332	select CPU_SH3
333	select CPU_HAS_DSP
334	select SYS_SUPPORTS_SH_CMT
335	select USB_OHCI_SH if USB_OHCI_HCD
336	select PINCTRL
337	help
338	  Select SH7720 if you have a SH3-DSP SH7720 CPU.
339
340config CPU_SUBTYPE_SH7721
341	bool "Support SH7721 processor"
342	select CPU_SH3
343	select CPU_HAS_DSP
344	select SYS_SUPPORTS_SH_CMT
345	select USB_OHCI_SH if USB_OHCI_HCD
346	help
347	  Select SH7721 if you have a SH3-DSP SH7721 CPU.
348
349# SH-4 Processor Support
350
351config CPU_SUBTYPE_SH7750
352	bool "Support SH7750 processor"
353	select CPU_SH4
354	help
355	  Select SH7750 if you have a 200 Mhz SH-4 HD6417750 CPU.
356
357config CPU_SUBTYPE_SH7091
358	bool "Support SH7091 processor"
359	select CPU_SH4
360	help
361	  Select SH7091 if you have an SH-4 based Sega device (such as
362	  the Dreamcast, Naomi, and Naomi 2).
363
364config CPU_SUBTYPE_SH7750R
365	bool "Support SH7750R processor"
366	select CPU_SH4
367
368config CPU_SUBTYPE_SH7750S
369	bool "Support SH7750S processor"
370	select CPU_SH4
371
372config CPU_SUBTYPE_SH7751
373	bool "Support SH7751 processor"
374	select CPU_SH4
375	help
376	  Select SH7751 if you have a 166 Mhz SH-4 HD6417751 CPU,
377	  or if you have a HD6417751R CPU.
378
379config CPU_SUBTYPE_SH7751R
380	bool "Support SH7751R processor"
381	select CPU_SH4
382
383config CPU_SUBTYPE_SH7760
384	bool "Support SH7760 processor"
385	select CPU_SH4
386
387# SH-4A Processor Support
388
389config CPU_SUBTYPE_SH7723
390	bool "Support SH7723 processor"
391	select CPU_SH4A
392	select CPU_SHX2
393	select ARCH_SHMOBILE
394	select ARCH_SPARSEMEM_ENABLE
395	select SYS_SUPPORTS_SH_CMT
396	select PINCTRL
397	help
398	  Select SH7723 if you have an SH-MobileR2 CPU.
399
400config CPU_SUBTYPE_SH7724
401	bool "Support SH7724 processor"
402	select CPU_SH4A
403	select CPU_SHX2
404	select ARCH_SHMOBILE
405	select ARCH_SPARSEMEM_ENABLE
406	select SYS_SUPPORTS_SH_CMT
407	select PINCTRL
408	help
409	  Select SH7724 if you have an SH-MobileR2R CPU.
410
411config CPU_SUBTYPE_SH7734
412	bool "Support SH7734 processor"
413	select CPU_SH4A
414	select CPU_SHX2
415	select PINCTRL
416	help
417	  Select SH7734 if you have a SH4A SH7734 CPU.
418
419config CPU_SUBTYPE_SH7757
420	bool "Support SH7757 processor"
421	select CPU_SH4A
422	select CPU_SHX2
423	select PINCTRL
424	help
425	  Select SH7757 if you have a SH4A SH7757 CPU.
426
427config CPU_SUBTYPE_SH7763
428	bool "Support SH7763 processor"
429	select CPU_SH4A
430	select USB_OHCI_SH if USB_OHCI_HCD
431	help
432	  Select SH7763 if you have a SH4A SH7763(R5S77631) CPU.
433
434config CPU_SUBTYPE_SH7770
435	bool "Support SH7770 processor"
436	select CPU_SH4A
437
438config CPU_SUBTYPE_SH7780
439	bool "Support SH7780 processor"
440	select CPU_SH4A
441
442config CPU_SUBTYPE_SH7785
443	bool "Support SH7785 processor"
444	select CPU_SH4A
445	select CPU_SHX2
446	select ARCH_SPARSEMEM_ENABLE
447	select SYS_SUPPORTS_NUMA
448	select PINCTRL
449
450config CPU_SUBTYPE_SH7786
451	bool "Support SH7786 processor"
452	select CPU_SH4A
453	select CPU_SHX3
454	select CPU_HAS_PTEAEX
455	select GENERIC_CLOCKEVENTS_BROADCAST if SMP
456	select USB_OHCI_SH if USB_OHCI_HCD
457	select USB_EHCI_SH if USB_EHCI_HCD
458	select PINCTRL
459
460config CPU_SUBTYPE_SHX3
461	bool "Support SH-X3 processor"
462	select CPU_SH4A
463	select CPU_SHX3
464	select GENERIC_CLOCKEVENTS_BROADCAST if SMP
465	select GPIOLIB
466	select PINCTRL
467
468# SH4AL-DSP Processor Support
469
470config CPU_SUBTYPE_SH7343
471	bool "Support SH7343 processor"
472	select CPU_SH4AL_DSP
473	select ARCH_SHMOBILE
474	select SYS_SUPPORTS_SH_CMT
475
476config CPU_SUBTYPE_SH7722
477	bool "Support SH7722 processor"
478	select CPU_SH4AL_DSP
479	select CPU_SHX2
480	select ARCH_SHMOBILE
481	select ARCH_SPARSEMEM_ENABLE
482	select SYS_SUPPORTS_NUMA
483	select SYS_SUPPORTS_SH_CMT
484	select PINCTRL
485
486config CPU_SUBTYPE_SH7366
487	bool "Support SH7366 processor"
488	select CPU_SH4AL_DSP
489	select CPU_SHX2
490	select ARCH_SHMOBILE
491	select ARCH_SPARSEMEM_ENABLE
492	select SYS_SUPPORTS_NUMA
493	select SYS_SUPPORTS_SH_CMT
494
495endchoice
496
497source "arch/sh/mm/Kconfig"
498
499source "arch/sh/Kconfig.cpu"
500
501source "arch/sh/boards/Kconfig"
502
503menu "Timer and clock configuration"
504
505config SH_PCLK_FREQ
506	int "Peripheral clock frequency (in Hz)"
507	depends on SH_CLK_CPG_LEGACY
508	default "31250000" if CPU_SUBTYPE_SH7619
509	default "33333333" if CPU_SUBTYPE_SH7770 || \
510			      CPU_SUBTYPE_SH7760 || \
511			      CPU_SUBTYPE_SH7705 || \
512			      CPU_SUBTYPE_SH7203 || \
513			      CPU_SUBTYPE_SH7206 || \
514			      CPU_SUBTYPE_SH7263 || \
515			      CPU_SUBTYPE_MXG
516	default "60000000" if CPU_SUBTYPE_SH7751 || CPU_SUBTYPE_SH7751R
517	default "50000000"
518	help
519	  This option is used to specify the peripheral clock frequency.
520	  This is necessary for determining the reference clock value on
521	  platforms lacking an RTC.
522
523config SH_CLK_CPG
524	def_bool y
525
526config SH_CLK_CPG_LEGACY
527	depends on SH_CLK_CPG
528	def_bool y if !CPU_SUBTYPE_SH7785 && !ARCH_SHMOBILE && \
529		      !CPU_SHX3 && !CPU_SUBTYPE_SH7757 && \
530		      !CPU_SUBTYPE_SH7734 && !CPU_SUBTYPE_SH7264 && \
531		      !CPU_SUBTYPE_SH7269
532
533endmenu
534
535menu "CPU Frequency scaling"
536source "drivers/cpufreq/Kconfig"
537endmenu
538
539source "arch/sh/drivers/Kconfig"
540
541endmenu
542
543menu "Kernel features"
544
545source "kernel/Kconfig.hz"
546
547config ARCH_SUPPORTS_KEXEC
548	def_bool MMU
549
550config ARCH_SUPPORTS_CRASH_DUMP
551	def_bool BROKEN_ON_SMP
552
553config ARCH_SUPPORTS_KEXEC_JUMP
554	def_bool y
555
556config PHYSICAL_START
557	hex "Physical address where the kernel is loaded" if (EXPERT || CRASH_DUMP)
558	default MEMORY_START
559	help
560	  This gives the physical address where the kernel is loaded
561	  and is ordinarily the same as MEMORY_START.
562
563	  Different values are primarily used in the case of kexec on panic
564	  where the fail safe kernel needs to run at a different address
565	  than the panic-ed kernel.
566
567config SMP
568	bool "Symmetric multi-processing support"
569	depends on SYS_SUPPORTS_SMP
570	help
571	  This enables support for systems with more than one CPU. If you have
572	  a system with only one CPU, say N. If you have a system with more
573	  than one CPU, say Y.
574
575	  If you say N here, the kernel will run on uni- and multiprocessor
576	  machines, but will use only one CPU of a multiprocessor machine. If
577	  you say Y here, the kernel will run on many, but not all,
578	  uniprocessor machines. On a uniprocessor machine, the kernel
579	  will run faster if you say N here.
580
581	  People using multiprocessor machines who say Y here should also say
582	  Y to "Enhanced Real Time Clock Support", below.
583
584	  See also <file:Documentation/admin-guide/lockup-watchdogs.rst> and the SMP-HOWTO
585	  available at <https://www.tldp.org/docs.html#howto>.
586
587	  If you don't know what to do here, say N.
588
589config NR_CPUS
590	int "Maximum number of CPUs (2-32)"
591	range 2 32
592	depends on SMP
593	default "4" if CPU_SUBTYPE_SHX3
594	default "2"
595	help
596	  This allows you to specify the maximum number of CPUs which this
597	  kernel will support.  The maximum supported value is 32 and the
598	  minimum value which makes sense is 2.
599
600	  This is purely to save memory - each supported CPU adds
601	  approximately eight kilobytes to the kernel image.
602
603config HOTPLUG_CPU
604	bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
605	depends on SMP
606	help
607	  Say Y here to experiment with turning CPUs off and on.  CPUs
608	  can be controlled through /sys/devices/system/cpu.
609
610config GUSA
611	def_bool y
612	depends on !SMP
613	help
614	  This enables support for gUSA (general UserSpace Atomicity).
615	  This is the default implementation for both UP and non-ll/sc
616	  CPUs, and is used by the libc, amongst others.
617
618	  For additional information, design information can be found
619	  in <http://lc.linux.or.jp/lc2002/papers/niibe0919p.pdf>.
620
621	  This should only be disabled for special cases where alternate
622	  atomicity implementations exist.
623
624config GUSA_RB
625	bool "Implement atomic operations by roll-back (gRB) (EXPERIMENTAL)"
626	depends on GUSA && CPU_SH3 || (CPU_SH4 && !CPU_SH4A)
627	help
628	  Enabling this option will allow the kernel to implement some
629	  atomic operations using a software implementation of load-locked/
630	  store-conditional (LLSC). On machines which do not have hardware
631	  LLSC, this should be more efficient than the other alternative of
632	  disabling interrupts around the atomic sequence.
633
634config HW_PERF_EVENTS
635	bool "Enable hardware performance counter support for perf events"
636	depends on PERF_EVENTS && CPU_HAS_PMU
637	default y
638	help
639	  Enable hardware performance counter support for perf events. If
640	  disabled, perf events will use software events only.
641
642source "drivers/sh/Kconfig"
643
644endmenu
645
646menu "Boot options"
647
648config USE_BUILTIN_DTB
649	bool "Use builtin DTB"
650	default n
651	depends on SH_DEVICE_TREE
652	help
653	  Link a device tree blob for particular hardware into the kernel,
654	  suppressing use of the DTB pointer provided by the bootloader.
655	  This option should only be used with legacy bootloaders that are
656	  not capable of providing a DTB to the kernel, or for experimental
657	  hardware without stable device tree bindings.
658
659config BUILTIN_DTB_SOURCE
660	string "Source file for builtin DTB"
661	default ""
662	depends on USE_BUILTIN_DTB
663	help
664	  Base name (without suffix, relative to arch/sh/boot/dts) for the
665	  a DTS file that will be used to produce the DTB linked into the
666	  kernel.
667
668config ZERO_PAGE_OFFSET
669	hex
670	default "0x00010000" if PAGE_SIZE_64KB || SH_RTS7751R2D || \
671				SH_7751_SOLUTION_ENGINE
672	default "0x00004000" if PAGE_SIZE_16KB || SH_SH03
673	default "0x00002000" if PAGE_SIZE_8KB
674	default "0x00001000"
675	help
676	  This sets the default offset of zero page.
677
678config BOOT_LINK_OFFSET
679	hex
680	default "0x00210000" if SH_SHMIN
681	default "0x00810000" if SH_7780_SOLUTION_ENGINE
682	default "0x009e0000" if SH_TITAN
683	default "0x01800000" if SH_SDK7780
684	default "0x02000000" if SH_EDOSK7760
685	default "0x00800000"
686	help
687	  This option allows you to set the link address offset of the zImage.
688	  This can be useful if you are on a board which has a small amount of
689	  memory.
690
691config ENTRY_OFFSET
692	hex
693	default "0x00001000" if PAGE_SIZE_4KB
694	default "0x00002000" if PAGE_SIZE_8KB
695	default "0x00004000" if PAGE_SIZE_16KB
696	default "0x00010000" if PAGE_SIZE_64KB
697	default "0x00000000"
698
699config ROMIMAGE_MMCIF
700	bool "Include MMCIF loader in romImage (EXPERIMENTAL)"
701	depends on CPU_SUBTYPE_SH7724
702	help
703	  Say Y here to include experimental MMCIF loading code in
704	  romImage. With this enabled it is possible to write the romImage
705	  kernel image to an MMC card and boot the kernel straight from
706	  the reset vector. At reset the processor Mask ROM will load the
707	  first part of the romImage which in turn loads the rest the kernel
708	  image to RAM using the MMCIF hardware block.
709
710choice
711	prompt "Kernel command line"
712	default CMDLINE_OVERWRITE
713	help
714	  Setting this option allows the kernel command line arguments
715	  to be set.
716
717config CMDLINE_OVERWRITE
718	bool "Overwrite bootloader kernel arguments"
719	help
720	  Given string will overwrite any arguments passed in by
721	  a bootloader.
722
723config CMDLINE_EXTEND
724	bool "Extend bootloader kernel arguments"
725	help
726	  Given string will be concatenated with arguments passed in
727	  by a bootloader.
728
729config CMDLINE_FROM_BOOTLOADER
730	bool "Use bootloader kernel arguments"
731	help
732	  Uses the command-line options passed by the boot loader.
733
734endchoice
735
736config CMDLINE
737	string "Kernel command line arguments string"
738	depends on CMDLINE_OVERWRITE || CMDLINE_EXTEND
739	default "console=ttySC1,115200"
740
741endmenu
742
743menu "Bus options"
744
745config MAPLE
746	bool "Maple Bus support"
747	depends on SH_DREAMCAST
748	help
749	 The Maple Bus is SEGA's serial communication bus for peripherals
750	 on the Dreamcast. Without this bus support you won't be able to
751	 get your Dreamcast keyboard etc to work, so most users
752	 probably want to say 'Y' here, unless you are only using the
753	 Dreamcast with a serial line terminal or a remote network
754	 connection.
755
756endmenu
757
758menu "Power management options (EXPERIMENTAL)"
759
760source "kernel/power/Kconfig"
761
762source "drivers/cpuidle/Kconfig"
763
764endmenu
765