Merge branches 'sh/xstate', 'sh/hw-breakpoints' and 'sh/stable-updates'
[linux-block.git] / arch / sh / Kconfig
CommitLineData
1da177e4
LT
1#
2# For a description of the syntax of this configuration file,
3# see Documentation/kbuild/kconfig-language.txt.
4#
5
6mainmenu "Linux/SuperH Kernel Configuration"
7
8config SUPERH
ea0e1a9a 9 def_bool y
7a440c95 10 select EMBEDDED
9483a578 11 select HAVE_CLK
ec7748b5 12 select HAVE_IDE
c601a51a 13 select HAVE_LMB
42d4b839 14 select HAVE_OPROFILE
9de90ac2 15 select HAVE_GENERIC_DMA_COHERENT
21944781 16 select HAVE_IOREMAP_PROT if MMU
d7b01f78 17 select HAVE_ARCH_TRACEHOOK
f802d969 18 select HAVE_DMA_API_DEBUG
73c926be 19 select HAVE_DMA_ATTRS
cdd6c482 20 select HAVE_PERF_EVENTS
72f0c137 21 select PERF_USE_VMALLOC
df8ce259 22 select HAVE_KERNEL_GZIP
07e88e1b
PM
23 select HAVE_KERNEL_BZIP2
24 select HAVE_KERNEL_LZMA
a74f7e04 25 select HAVE_SYSCALL_TRACEPOINTS
6eac1af0 26 select RTC_LIB
f01789c6 27 select GENERIC_ATOMIC64
1da177e4
LT
28 help
29 The SuperH is a RISC processor targeted for use in embedded systems
30 and consumer electronics; it was also used in the Sega Dreamcast
31 gaming console. The SuperH port has a home page at
32 <http://www.linux-sh.org/>.
33
39d28a2d 34config SUPERH32
3cc000b5 35 def_bool ARCH = "sh"
d39f5450
CS
36 select HAVE_KPROBES
37 select HAVE_KRETPROBES
694f94f2 38 select HAVE_FUNCTION_TRACER
fad57feb
MF
39 select HAVE_FTRACE_MCOUNT_RECORD
40 select HAVE_DYNAMIC_FTRACE
c1340c05 41 select HAVE_FUNCTION_TRACE_MCOUNT_TEST
e4b053d9 42 select HAVE_FTRACE_NMI_ENTER if DYNAMIC_FTRACE
327933f5 43 select HAVE_FUNCTION_GRAPH_TRACER
ab6e570b 44 select HAVE_ARCH_KGDB
6fbfe8d7 45 select HAVE_HW_BREAKPOINT
6c0ee6a4 46 select PERF_EVENTS if HAVE_HW_BREAKPOINT
8dafc346 47 select ARCH_HIBERNATION_POSSIBLE if MMU
ea0e1a9a
PM
48
49config SUPERH64
3cc000b5 50 def_bool ARCH = "sh64"
39d28a2d 51
f42b7e3d
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52config ARCH_DEFCONFIG
53 string
54 default "arch/sh/configs/shx3_defconfig" if SUPERH32
55 default "arch/sh/configs/cayman_defconfig" if SUPERH64
56
1da177e4 57config RWSEM_GENERIC_SPINLOCK
d7ef4fb3 58 def_bool y
1da177e4
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59
60config RWSEM_XCHGADD_ALGORITHM
61 bool
62
fa691511
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63config GENERIC_BUG
64 def_bool y
a82d53ec 65 depends on BUG && SUPERH32
fa691511 66
3767f3f1
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67config GENERIC_CSUM
68 def_bool y
69 depends on SUPERH64
70
e2268c71 71config GENERIC_FIND_NEXT_BIT
d7ef4fb3 72 def_bool y
e2268c71
AM
73
74config GENERIC_HWEIGHT
d7ef4fb3 75 def_bool y
e2268c71 76
1da177e4 77config GENERIC_HARDIRQS
d7ef4fb3 78 def_bool y
1da177e4 79
5093c9a4
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80config GENERIC_HARDIRQS_NO__DO_IRQ
81 def_bool y
82
1da177e4 83config GENERIC_IRQ_PROBE
d7ef4fb3 84 def_bool y
1da177e4 85
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86config IRQ_PER_CPU
87 def_bool y
88
2967dab1
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89config GENERIC_GPIO
90 def_bool n
91
1da177e4 92config GENERIC_CALIBRATE_DELAY
cf204fa7 93 bool
1da177e4 94
cad82448
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95config GENERIC_IOMAP
96 bool
97
45882145 98config GENERIC_TIME
75634311 99 def_bool y
45882145 100
57be2b48 101config GENERIC_CLOCKEVENTS
938edae1 102 def_bool y
57be2b48 103
8c24594d
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104config GENERIC_CLOCKEVENTS_BROADCAST
105 bool
106
6d134b9e
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107config GENERIC_CMOS_UPDATE
108 def_bool y
109 depends on SH_SH03 || SH_DREAMCAST
110
bdcab87b
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111config GENERIC_LOCKBREAK
112 def_bool y
113 depends on SMP && PREEMPT
114
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115config SYS_SUPPORTS_PM
116 bool
af998a9a
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117 depends on !SMP
118
119config ARCH_SUSPEND_POSSIBLE
120 def_bool n
121
122config ARCH_HIBERNATION_POSSIBLE
123 def_bool n
357d5946 124
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125config SYS_SUPPORTS_APM_EMULATION
126 bool
af998a9a 127 select ARCH_SUSPEND_POSSIBLE
357d5946 128
ffb4a73d
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129config SYS_SUPPORTS_HUGETLBFS
130 bool
131
357d5946
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132config SYS_SUPPORTS_SMP
133 bool
134
135config SYS_SUPPORTS_NUMA
136 bool
137
138config SYS_SUPPORTS_PCI
139 bool
0a9b0db1 140
f5ad881b
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141config SYS_SUPPORTS_CMT
142 bool
143
d5ed4c2e
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144config SYS_SUPPORTS_MTU2
145 bool
146
9570ef20
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147config SYS_SUPPORTS_TMU
148 bool
149
afbfb52e 150config STACKTRACE_SUPPORT
d7ef4fb3 151 def_bool y
afbfb52e
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152
153config LOCKDEP_SUPPORT
d7ef4fb3 154 def_bool y
afbfb52e 155
5a89f1ad
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156config HAVE_LATENCYTOP_SUPPORT
157 def_bool y
158 depends on !SMP
159
f0d1b0b3 160config ARCH_HAS_ILOG2_U32
d7ef4fb3 161 def_bool n
f0d1b0b3
DH
162
163config ARCH_HAS_ILOG2_U64
d7ef4fb3 164 def_bool n
f0d1b0b3 165
e257ad06
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166config ARCH_NO_VIRT_TO_BUS
167 def_bool y
168
e869a90e
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169config ARCH_HAS_DEFAULT_IDLE
170 def_bool y
171
2e046b94
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172config ARCH_HAS_CPU_IDLE_WAIT
173 def_bool y
174
e7cc9a73
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175config IO_TRAPPED
176 bool
177
01be5d63
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178config DMA_COHERENT
179 bool
180
181config DMA_NONCOHERENT
182 def_bool !DMA_COHERENT
183
1da177e4
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184source "init/Kconfig"
185
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186source "kernel/Kconfig.freezer"
187
1da177e4
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188menu "System type"
189
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190#
191# Processor families
192#
193config CPU_SH2
194 bool
195
196config CPU_SH2A
197 bool
198 select CPU_SH2
199
200config CPU_SH3
201 bool
202 select CPU_HAS_INTEVT
203 select CPU_HAS_SR_RB
4fa48e17 204 select SYS_SUPPORTS_TMU
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205
206config CPU_SH4
207 bool
208 select CPU_HAS_INTEVT
209 select CPU_HAS_SR_RB
b5f42db0 210 select CPU_HAS_FPU if !CPU_SH4AL_DSP
4fa48e17 211 select SYS_SUPPORTS_TMU
ffb4a73d 212 select SYS_SUPPORTS_HUGETLBFS if MMU
b5f42db0
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213
214config CPU_SH4A
215 bool
216 select CPU_SH4
217
218config CPU_SH4AL_DSP
219 bool
220 select CPU_SH4A
221 select CPU_HAS_DSP
222
ea0e1a9a
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223config CPU_SH5
224 bool
225 select CPU_HAS_FPU
add47067 226 select SYS_SUPPORTS_TMU
ffb4a73d 227 select SYS_SUPPORTS_HUGETLBFS if MMU
ea0e1a9a 228
b5f42db0
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229config CPU_SHX2
230 bool
231
232config CPU_SHX3
233 bool
01be5d63 234 select DMA_COHERENT
b5f42db0 235
dc65a977
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236config ARCH_SHMOBILE
237 bool
77594912 238 select ARCH_SUSPEND_POSSIBLE
ac2c596b
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239 select PM
240 select PM_RUNTIME
dc65a977 241
3cc000b5
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242if SUPERH32
243
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244choice
245 prompt "Processor sub-type selection"
246
247#
248# Processor subtypes
249#
250
251# SH-2 Processor Support
252
253config CPU_SUBTYPE_SH7619
254 bool "Support SH7619 processor"
255 select CPU_SH2
f5ad881b 256 select SYS_SUPPORTS_CMT
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257
258# SH-2A Processor Support
259
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260config CPU_SUBTYPE_SH7201
261 bool "Support SH7201 processor"
262 select CPU_SH2A
263 select CPU_HAS_FPU
da107c6e 264 select SYS_SUPPORTS_MTU2
2825999e 265
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266config CPU_SUBTYPE_SH7203
267 bool "Support SH7203 processor"
268 select CPU_SH2A
74d99a5e 269 select CPU_HAS_FPU
f5ad881b 270 select SYS_SUPPORTS_CMT
da107c6e 271 select SYS_SUPPORTS_MTU2
6d01f510 272
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273config CPU_SUBTYPE_SH7206
274 bool "Support SH7206 processor"
275 select CPU_SH2A
f5ad881b 276 select SYS_SUPPORTS_CMT
da107c6e 277 select SYS_SUPPORTS_MTU2
b5f42db0 278
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279config CPU_SUBTYPE_SH7263
280 bool "Support SH7263 processor"
281 select CPU_SH2A
74d99a5e 282 select CPU_HAS_FPU
f5ad881b 283 select SYS_SUPPORTS_CMT
da107c6e 284 select SYS_SUPPORTS_MTU2
a8f67f4b 285
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286config CPU_SUBTYPE_MXG
287 bool "Support MX-G processor"
288 select CPU_SH2A
da107c6e 289 select SYS_SUPPORTS_MTU2
2ad69908
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290 help
291 Select MX-G if running on an R8A03022BG part.
292
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293# SH-3 Processor Support
294
295config CPU_SUBTYPE_SH7705
296 bool "Support SH7705 processor"
297 select CPU_SH3
298
299config CPU_SUBTYPE_SH7706
300 bool "Support SH7706 processor"
301 select CPU_SH3
302 help
303 Select SH7706 if you have a 133 Mhz SH-3 HD6417706 CPU.
304
305config CPU_SUBTYPE_SH7707
306 bool "Support SH7707 processor"
307 select CPU_SH3
308 help
309 Select SH7707 if you have a 60 Mhz SH-3 HD6417707 CPU.
310
311config CPU_SUBTYPE_SH7708
312 bool "Support SH7708 processor"
313 select CPU_SH3
314 help
315 Select SH7708 if you have a 60 Mhz SH-3 HD6417708S or
316 if you have a 100 Mhz SH-3 HD6417708R CPU.
317
318config CPU_SUBTYPE_SH7709
319 bool "Support SH7709 processor"
320 select CPU_SH3
321 help
322 Select SH7709 if you have a 80 Mhz SH-3 HD6417709 CPU.
323
324config CPU_SUBTYPE_SH7710
325 bool "Support SH7710 processor"
326 select CPU_SH3
327 select CPU_HAS_DSP
328 help
329 Select SH7710 if you have a SH3-DSP SH7710 CPU.
330
331config CPU_SUBTYPE_SH7712
332 bool "Support SH7712 processor"
333 select CPU_SH3
334 select CPU_HAS_DSP
335 help
336 Select SH7712 if you have a SH3-DSP SH7712 CPU.
337
338config CPU_SUBTYPE_SH7720
339 bool "Support SH7720 processor"
340 select CPU_SH3
341 select CPU_HAS_DSP
2b23a882 342 select SYS_SUPPORTS_CMT
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343 help
344 Select SH7720 if you have a SH3-DSP SH7720 CPU.
345
31a49c4b
YS
346config CPU_SUBTYPE_SH7721
347 bool "Support SH7721 processor"
348 select CPU_SH3
349 select CPU_HAS_DSP
2b23a882 350 select SYS_SUPPORTS_CMT
31a49c4b
YS
351 help
352 Select SH7721 if you have a SH3-DSP SH7721 CPU.
353
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354# SH-4 Processor Support
355
356config CPU_SUBTYPE_SH7750
357 bool "Support SH7750 processor"
358 select CPU_SH4
359 help
360 Select SH7750 if you have a 200 Mhz SH-4 HD6417750 CPU.
361
362config CPU_SUBTYPE_SH7091
363 bool "Support SH7091 processor"
364 select CPU_SH4
365 help
366 Select SH7091 if you have an SH-4 based Sega device (such as
367 the Dreamcast, Naomi, and Naomi 2).
368
369config CPU_SUBTYPE_SH7750R
370 bool "Support SH7750R processor"
371 select CPU_SH4
372
373config CPU_SUBTYPE_SH7750S
374 bool "Support SH7750S processor"
375 select CPU_SH4
376
377config CPU_SUBTYPE_SH7751
378 bool "Support SH7751 processor"
379 select CPU_SH4
380 help
381 Select SH7751 if you have a 166 Mhz SH-4 HD6417751 CPU,
382 or if you have a HD6417751R CPU.
383
384config CPU_SUBTYPE_SH7751R
385 bool "Support SH7751R processor"
386 select CPU_SH4
387
388config CPU_SUBTYPE_SH7760
389 bool "Support SH7760 processor"
390 select CPU_SH4
391
392config CPU_SUBTYPE_SH4_202
393 bool "Support SH4-202 processor"
394 select CPU_SH4
395
396# SH-4A Processor Support
397
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398config CPU_SUBTYPE_SH7723
399 bool "Support SH7723 processor"
400 select CPU_SH4A
401 select CPU_SHX2
dc65a977 402 select ARCH_SHMOBILE
178dd0cd 403 select ARCH_SPARSEMEM_ENABLE
f5ad881b 404 select SYS_SUPPORTS_CMT
178dd0cd
PM
405 help
406 Select SH7723 if you have an SH-MobileR2 CPU.
407
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408config CPU_SUBTYPE_SH7724
409 bool "Support SH7724 processor"
410 select CPU_SH4A
411 select CPU_SHX2
59fe700d 412 select ARCH_SHMOBILE
0207a2ef
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413 select ARCH_SPARSEMEM_ENABLE
414 select SYS_SUPPORTS_CMT
415 help
416 Select SH7724 if you have an SH-MobileR2R CPU.
417
c01f0f1a
YS
418config CPU_SUBTYPE_SH7757
419 bool "Support SH7757 processor"
420 select CPU_SH4A
421 select CPU_SHX2
422 help
423 Select SH7757 if you have a SH4A SH7757 CPU.
424
7d740a06
YS
425config CPU_SUBTYPE_SH7763
426 bool "Support SH7763 processor"
427 select CPU_SH4A
428 help
429 Select SH7763 if you have a SH4A SH7763(R5S77631) CPU.
430
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431config CPU_SUBTYPE_SH7770
432 bool "Support SH7770 processor"
433 select CPU_SH4A
434
435config CPU_SUBTYPE_SH7780
436 bool "Support SH7780 processor"
437 select CPU_SH4A
438
439config CPU_SUBTYPE_SH7785
440 bool "Support SH7785 processor"
441 select CPU_SH4A
442 select CPU_SHX2
55ba99eb
KM
443 select ARCH_SPARSEMEM_ENABLE
444 select SYS_SUPPORTS_NUMA
445
446config CPU_SUBTYPE_SH7786
447 bool "Support SH7786 processor"
448 select CPU_SH4A
37042fbd 449 select CPU_SHX3
8263a67e 450 select CPU_HAS_PTEAEX
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451 select ARCH_SPARSEMEM_ENABLE
452 select SYS_SUPPORTS_NUMA
2eb2a436
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453 select SYS_SUPPORTS_SMP
454 select GENERIC_CLOCKEVENTS_BROADCAST if SMP
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455
456config CPU_SUBTYPE_SHX3
457 bool "Support SH-X3 processor"
458 select CPU_SH4A
459 select CPU_SHX3
460 select ARCH_SPARSEMEM_ENABLE
461 select SYS_SUPPORTS_NUMA
462 select SYS_SUPPORTS_SMP
5840263e 463 select GENERIC_CLOCKEVENTS_BROADCAST if SMP
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464
465# SH4AL-DSP Processor Support
466
467config CPU_SUBTYPE_SH7343
468 bool "Support SH7343 processor"
469 select CPU_SH4AL_DSP
dc65a977 470 select ARCH_SHMOBILE
f5ad881b 471 select SYS_SUPPORTS_CMT
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472
473config CPU_SUBTYPE_SH7722
474 bool "Support SH7722 processor"
475 select CPU_SH4AL_DSP
476 select CPU_SHX2
dc65a977 477 select ARCH_SHMOBILE
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478 select ARCH_SPARSEMEM_ENABLE
479 select SYS_SUPPORTS_NUMA
f5ad881b 480 select SYS_SUPPORTS_CMT
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481
482config CPU_SUBTYPE_SH7366
483 bool "Support SH7366 processor"
484 select CPU_SH4AL_DSP
485 select CPU_SHX2
dc65a977 486 select ARCH_SHMOBILE
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487 select ARCH_SPARSEMEM_ENABLE
488 select SYS_SUPPORTS_NUMA
f5ad881b 489 select SYS_SUPPORTS_CMT
b5f42db0 490
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491endchoice
492
493endif
494
495if SUPERH64
496
497choice
498 prompt "Processor sub-type selection"
499
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500# SH-5 Processor Support
501
502config CPU_SUBTYPE_SH5_101
503 bool "Support SH5-101 processor"
504 select CPU_SH5
505
506config CPU_SUBTYPE_SH5_103
507 bool "Support SH5-103 processor"
8ef97dd7 508 select CPU_SH5
ea0e1a9a 509
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510endchoice
511
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512endif
513
f3d22298 514source "arch/sh/mm/Kconfig"
939a24a6 515
4690bdc7 516source "arch/sh/Kconfig.cpu"
f3d22298 517
939a24a6 518source "arch/sh/boards/Kconfig"
32351a28 519
32351a28
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520menu "Timer and clock configuration"
521
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522config SH_TIMER_TMU
523 bool "TMU timer driver"
f19900b2 524 depends on SYS_SUPPORTS_TMU
9570ef20 525 default y
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526 help
527 This enables the build of the TMU timer driver.
528
f5ad881b 529config SH_TIMER_CMT
f425752f
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530 bool "CMT timer driver"
531 depends on SYS_SUPPORTS_CMT
532 default y
f425752f
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533 help
534 This enables build of the CMT timer driver.
f5ad881b 535
d5ed4c2e
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536config SH_TIMER_MTU2
537 bool "MTU2 timer driver"
3280c886 538 depends on SYS_SUPPORTS_MTU2
d5ed4c2e 539 default y
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540 help
541 This enables build of the MTU2 timer driver.
542
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543config SH_PCLK_FREQ
544 int "Peripheral clock frequency (in Hz)"
8152a74b 545 depends on SH_CLK_CPG_LEGACY
9d4436a6 546 default "31250000" if CPU_SUBTYPE_SH7619
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547 default "33333333" if CPU_SUBTYPE_SH7770 || \
548 CPU_SUBTYPE_SH7760 || \
549 CPU_SUBTYPE_SH7705 || \
550 CPU_SUBTYPE_SH7203 || \
551 CPU_SUBTYPE_SH7206 || \
552 CPU_SUBTYPE_SH7263 || \
553 CPU_SUBTYPE_MXG || \
554 CPU_SUBTYPE_SH7786
05627486 555 default "60000000" if CPU_SUBTYPE_SH7751 || CPU_SUBTYPE_SH7751R
cad82448 556 default "66000000" if CPU_SUBTYPE_SH4_202
05627486 557 default "50000000"
1da177e4 558 help
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559 This option is used to specify the peripheral clock frequency.
560 This is necessary for determining the reference clock value on
561 platforms lacking an RTC.
1da177e4 562
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563config SH_CLK_CPG
564 def_bool y
565
253b0887 566config SH_CLK_CPG_LEGACY
36aa1e32 567 depends on SH_CLK_CPG
46e9371c 568 def_bool y if !CPU_SUBTYPE_SH7785 && !ARCH_SHMOBILE
253b0887 569
9d4436a6
YS
570config SH_CLK_MD
571 int "CPU Mode Pin Setting"
6d01f510 572 depends on CPU_SH2
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573 default 6 if CPU_SUBTYPE_SH7206
574 default 5 if CPU_SUBTYPE_SH7619
575 default 0
9d4436a6 576 help
11cbb70e 577 MD2 - MD0 pin setting.
9d4436a6 578
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579source "kernel/time/Kconfig"
580
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581endmenu
582
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583menu "CPU Frequency scaling"
584
585source "drivers/cpufreq/Kconfig"
1da177e4 586
cad82448
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587config SH_CPU_FREQ
588 tristate "SuperH CPU Frequency driver"
cb5ec75b 589 depends on CPU_FREQ
cad82448 590 select CPU_FREQ_TABLE
1da177e4 591 help
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592 This adds the cpufreq driver for SuperH. Any CPU that supports
593 clock rate rounding through the clock framework can use this
594 driver. While it will make the kernel slightly larger, this is
595 harmless for CPUs that don't support rate rounding. The driver
596 will also generate a notice in the boot log before disabling
597 itself if the CPU in question is not capable of rate rounding.
1da177e4 598
cad82448 599 For details, take a look at <file:Documentation/cpu-freq>.
1da177e4
LT
600
601 If unsure, say N.
602
cad82448
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603endmenu
604
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605source "arch/sh/drivers/Kconfig"
606
cad82448 607endmenu
1da177e4 608
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609menu "Kernel features"
610
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611source kernel/Kconfig.hz
612
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613config KEXEC
614 bool "kexec system call (EXPERIMENTAL)"
f36b59d1 615 depends on SUPERH32 && EXPERIMENTAL && MMU
1da177e4 616 help
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617 kexec is a system call that implements the ability to shutdown your
618 current kernel, and to start another kernel. It is like a reboot
1f1332f7 619 but it is independent of the system firmware. And like a reboot
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620 you can start any kernel with it, not just Linux.
621
1f1332f7 622 The name comes from the similarity to the exec system call.
cad82448
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623
624 It is an ongoing process to be certain the hardware in a machine
625 is properly shutdown, so do not be surprised if this code does not
626 initially work for you. It may help to enable device hotplugging
627 support. As of this writing the exact hardware interface is
628 strongly in flux, so no good recommendation can be made.
629
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630config CRASH_DUMP
631 bool "kernel crash dumps (EXPERIMENTAL)"
640f7487 632 depends on SUPERH32 && EXPERIMENTAL
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633 help
634 Generate crash dump after being started by kexec.
635 This should be normally only set in special crash dump kernels
636 which are loaded in the main kernel with kexec-tools into
637 a specially reserved region and then later executed after
638 a crash by kdump/kexec. The crash dump kernel must be compiled
639 to a memory address not used by the main kernel using
640 MEMORY_START.
641
642 For more details see Documentation/kdump/kdump.txt
643
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644config KEXEC_JUMP
645 bool "kexec jump (EXPERIMENTAL)"
646 depends on SUPERH32 && KEXEC && HIBERNATION && EXPERIMENTAL
647 help
648 Jump between original kernel and kexeced kernel and invoke
649 code via KEXEC
650
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651config SECCOMP
652 bool "Enable seccomp to safely compute untrusted bytecode"
653 depends on PROC_FS
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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
1da177e4
LT
667config SMP
668 bool "Symmetric multi-processing support"
357d5946 669 depends on SYS_SUPPORTS_SMP
490f5de5 670 select USE_GENERIC_SMP_HELPERS
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671 ---help---
672 This enables support for systems with more than one CPU. If you have
673 a system with only one CPU, like most personal computers, say N. If
674 you have a system with more than one CPU, say Y.
675
676 If you say N here, the kernel will run on single 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 singleprocessor machines. On a singleprocessor 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
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685 See also <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO
686 available at <http://www.tldp.org/docs.html#howto>.
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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
2eb2a436 694 default "4" if CPU_SUBTYPE_SHX3
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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
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704source "kernel/Kconfig.preempt"
705
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706config GUSA
707 def_bool y
1efe4ce3 708 depends on !SMP && SUPERH32
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709 help
710 This enables support for gUSA (general UserSpace Atomicity).
711 This is the default implementation for both UP and non-ll/sc
712 CPUs, and is used by the libc, amongst others.
713
714 For additional information, design information can be found
715 in <http://lc.linux.or.jp/lc2002/papers/niibe0919p.pdf>.
716
717 This should only be disabled for special cases where alternate
718 atomicity implementations exist.
719
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720config GUSA_RB
721 bool "Implement atomic operations by roll-back (gRB) (EXPERIMENTAL)"
722 depends on GUSA && CPU_SH3 || (CPU_SH4 && !CPU_SH4A)
723 help
724 Enabling this option will allow the kernel to implement some
692105b8 725 atomic operations using a software implementation of load-locked/
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726 store-conditional (LLSC). On machines which do not have hardware
727 LLSC, this should be more efficient than the other alternative of
692105b8 728 disabling interrupts around the atomic sequence.
1efe4ce3 729
54ff328b 730config SPARSE_IRQ
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731 def_bool y
732 depends on SUPERH32 && !SH_DREAMCAST && !SH_HIGHLANDER && \
733 !SH_RTS7751R2D && !HD64461 && !SH_7724_SOLUTION_ENGINE
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734 help
735 This enables support for sparse irqs. This is useful in general
736 as most CPUs have a fairly sparse array of IRQ vectors, which
737 the irq_desc then maps directly on to. Systems with a high
738 number of off-chip IRQs will want to treat this as
739 experimental until they have been independently verified.
740
741 If you don't know what to do here, say N.
742
cad82448 743endmenu
1da177e4 744
cad82448 745menu "Boot options"
1da177e4 746
cad82448 747config ZERO_PAGE_OFFSET
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748 hex
749 default "0x00010000" if PAGE_SIZE_64KB || SH_RTS7751R2D || \
750 SH_7751_SOLUTION_ENGINE
751 default "0x00004000" if PAGE_SIZE_16KB || SH_SH03
7a847f81 752 default "0x00002000" if PAGE_SIZE_8KB
cad82448 753 default "0x00001000"
1da177e4 754 help
cad82448 755 This sets the default offset of zero page.
1da177e4 756
cad82448 757config BOOT_LINK_OFFSET
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758 hex
759 default "0x00210000" if SH_SHMIN
a2e76c80 760 default "0x00400000" if SH_CAYMAN
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761 default "0x00810000" if SH_7780_SOLUTION_ENGINE
762 default "0x009e0000" if SH_TITAN
763 default "0x01800000" if SH_SDK7780
764 default "0x02000000" if SH_EDOSK7760
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765 default "0x00800000"
766 help
767 This option allows you to set the link address offset of the zImage.
768 This can be useful if you are on a board which has a small amount of
769 memory.
1da177e4 770
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771config ENTRY_OFFSET
772 hex
773 default "0x00001000" if PAGE_SIZE_4KB
774 default "0x00002000" if PAGE_SIZE_8KB
775 default "0x00004000" if PAGE_SIZE_16KB
776 default "0x00010000" if PAGE_SIZE_64KB
777 default "0x00000000"
778
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779choice
780 prompt "Kernel command line"
781 optional
782 default CMDLINE_OVERWRITE
783 help
784 Setting this option allows the kernel command line arguments
785 to be set.
786
787config CMDLINE_OVERWRITE
788 bool "Overwrite bootloader kernel arguments"
789 help
790 Given string will overwrite any arguments passed in by
791 a bootloader.
792
793config CMDLINE_EXTEND
794 bool "Extend bootloader kernel arguments"
795 help
796 Given string will be concatenated with arguments passed in
797 by a bootloader.
798
799endchoice
1da177e4 800
cad82448 801config CMDLINE
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802 string "Kernel command line arguments string"
803 depends on CMDLINE_OVERWRITE || CMDLINE_EXTEND
cad82448 804 default "console=ttySC1,115200"
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805
806endmenu
807
cad82448 808menu "Bus options"
1da177e4 809
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810config SUPERHYWAY
811 tristate "SuperHyway Bus support"
812 depends on CPU_SUBTYPE_SH4_202
1da177e4 813
17be2d2b 814config MAPLE
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815 bool "Maple Bus support"
816 depends on SH_DREAMCAST
817 help
818 The Maple Bus is SEGA's serial communication bus for peripherals
819 on the Dreamcast. Without this bus support you won't be able to
820 get your Dreamcast keyboard etc to work, so most users
821 probably want to say 'Y' here, unless you are only using the
822 Dreamcast with a serial line terminal or a remote network
823 connection.
17be2d2b 824
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825config PCI
826 bool "PCI support"
827 depends on SYS_SUPPORTS_PCI
828 help
829 Find out whether you have a PCI motherboard. PCI is the name of a
830 bus system, i.e. the way the CPU talks to the other stuff inside
831 your box. If you have PCI, say Y, otherwise N.
1da177e4 832
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833source "drivers/pci/pcie/Kconfig"
834
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835source "drivers/pci/Kconfig"
836
837source "drivers/pcmcia/Kconfig"
838
839source "drivers/pci/hotplug/Kconfig"
840
841endmenu
842
843menu "Executable file formats"
844
845source "fs/Kconfig.binfmt"
846
847endmenu
848
3aa770e7 849menu "Power management options (EXPERIMENTAL)"
af998a9a 850depends on EXPERIMENTAL
f4cb5700 851
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852source "kernel/power/Kconfig"
853
854source "drivers/cpuidle/Kconfig"
3aa770e7 855
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856endmenu
857
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858source "net/Kconfig"
859
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860source "drivers/Kconfig"
861
862source "fs/Kconfig"
863
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864source "arch/sh/Kconfig.debug"
865
866source "security/Kconfig"
867
868source "crypto/Kconfig"
869
870source "lib/Kconfig"