Root/arch/sh/Kconfig

1config SUPERH
2    def_bool y
3    select EXPERT
4    select CLKDEV_LOOKUP
5    select HAVE_IDE if HAS_IOPORT
6    select HAVE_MEMBLOCK
7    select HAVE_MEMBLOCK_NODE_MAP
8    select ARCH_DISCARD_MEMBLOCK
9    select HAVE_OPROFILE
10    select HAVE_GENERIC_DMA_COHERENT
11    select HAVE_ARCH_TRACEHOOK
12    select HAVE_DMA_API_DEBUG
13    select HAVE_DMA_ATTRS
14    select HAVE_PERF_EVENTS
15    select HAVE_DEBUG_BUGVERBOSE
16    select ARCH_HAVE_CUSTOM_GPIO_H
17    select ARCH_HAVE_NMI_SAFE_CMPXCHG if (GUSA_RB || CPU_SH4A)
18    select PERF_USE_VMALLOC
19    select HAVE_DEBUG_KMEMLEAK
20    select HAVE_KERNEL_GZIP
21    select HAVE_KERNEL_BZIP2
22    select HAVE_KERNEL_LZMA
23    select HAVE_KERNEL_XZ
24    select HAVE_KERNEL_LZO
25    select HAVE_UID16
26    select ARCH_WANT_IPC_PARSE_VERSION
27    select HAVE_SYSCALL_TRACEPOINTS
28    select HAVE_REGS_AND_STACK_ACCESS_API
29    select HAVE_GENERIC_HARDIRQS
30    select MAY_HAVE_SPARSE_IRQ
31    select IRQ_FORCED_THREADING
32    select RTC_LIB
33    select GENERIC_ATOMIC64
34    select GENERIC_IRQ_SHOW
35    select GENERIC_SMP_IDLE_THREAD
36    select GENERIC_IDLE_POLL_SETUP
37    select GENERIC_CLOCKEVENTS
38    select GENERIC_CMOS_UPDATE if SH_SH03 || SH_DREAMCAST
39    select GENERIC_STRNCPY_FROM_USER
40    select GENERIC_STRNLEN_USER
41    select HAVE_MOD_ARCH_SPECIFIC if DWARF_UNWINDER
42    select MODULES_USE_ELF_RELA
43    select OLD_SIGSUSPEND
44    select OLD_SIGACTION
45    help
46      The SuperH is a RISC processor targeted for use in embedded systems
47      and consumer electronics; it was also used in the Sega Dreamcast
48      gaming console. The SuperH port has a home page at
49      <http://www.linux-sh.org/>.
50
51config SUPERH32
52    def_bool ARCH = "sh"
53    select HAVE_KPROBES
54    select HAVE_KRETPROBES
55    select HAVE_IOREMAP_PROT if MMU && !X2TLB
56    select HAVE_FUNCTION_TRACER
57    select HAVE_FTRACE_MCOUNT_RECORD
58    select HAVE_DYNAMIC_FTRACE
59    select HAVE_FUNCTION_TRACE_MCOUNT_TEST
60    select HAVE_FTRACE_NMI_ENTER if DYNAMIC_FTRACE
61    select ARCH_WANT_IPC_PARSE_VERSION
62    select HAVE_FUNCTION_GRAPH_TRACER
63    select HAVE_ARCH_KGDB
64    select HAVE_HW_BREAKPOINT
65    select HAVE_MIXED_BREAKPOINTS_REGS
66    select PERF_EVENTS
67    select ARCH_HIBERNATION_POSSIBLE if MMU
68    select SPARSE_IRQ
69
70config SUPERH64
71    def_bool ARCH = "sh64"
72    select KALLSYMS
73
74config ARCH_DEFCONFIG
75    string
76    default "arch/sh/configs/shx3_defconfig" if SUPERH32
77    default "arch/sh/configs/cayman_defconfig" if SUPERH64
78
79config RWSEM_GENERIC_SPINLOCK
80    def_bool y
81
82config RWSEM_XCHGADD_ALGORITHM
83    bool
84
85config GENERIC_BUG
86    def_bool y
87    depends on BUG && SUPERH32
88
89config GENERIC_CSUM
90    def_bool y
91    depends on SUPERH64
92
93config GENERIC_HWEIGHT
94    def_bool y
95
96config GENERIC_CALIBRATE_DELAY
97    bool
98
99config GENERIC_LOCKBREAK
100    def_bool y
101    depends on SMP && PREEMPT
102
103config ARCH_SUSPEND_POSSIBLE
104    def_bool n
105
106config ARCH_HIBERNATION_POSSIBLE
107    def_bool n
108
109config SYS_SUPPORTS_APM_EMULATION
110    bool
111    select ARCH_SUSPEND_POSSIBLE
112
113config SYS_SUPPORTS_HUGETLBFS
114    bool
115
116config SYS_SUPPORTS_SMP
117    bool
118
119config SYS_SUPPORTS_NUMA
120    bool
121
122config SYS_SUPPORTS_PCI
123    bool
124
125config SYS_SUPPORTS_CMT
126    bool
127
128config SYS_SUPPORTS_MTU2
129    bool
130
131config SYS_SUPPORTS_TMU
132    bool
133
134config STACKTRACE_SUPPORT
135    def_bool y
136
137config LOCKDEP_SUPPORT
138    def_bool y
139
140config HAVE_LATENCYTOP_SUPPORT
141    def_bool y
142
143config ARCH_HAS_ILOG2_U32
144    def_bool n
145
146config ARCH_HAS_ILOG2_U64
147    def_bool n
148
149config NO_IOPORT
150    def_bool !PCI
151    depends on !SH_CAYMAN && !SH_SH4202_MICRODEV && !SH_SHMIN && \
152           !SH_HP6XX && !SH_SOLUTION_ENGINE
153
154config IO_TRAPPED
155    bool
156
157config SWAP_IO_SPACE
158    bool
159
160config DMA_COHERENT
161    bool
162
163config DMA_NONCOHERENT
164    def_bool !DMA_COHERENT
165
166config NEED_DMA_MAP_STATE
167    def_bool DMA_NONCOHERENT
168
169config NEED_SG_DMA_LENGTH
170    def_bool y
171
172source "init/Kconfig"
173
174source "kernel/Kconfig.freezer"
175
176menu "System type"
177
178#
179# Processor families
180#
181config CPU_SH2
182    bool
183
184config CPU_SH2A
185    bool
186    select CPU_SH2
187    select UNCACHED_MAPPING
188
189config CPU_SH3
190    bool
191    select CPU_HAS_INTEVT
192    select CPU_HAS_SR_RB
193    select SYS_SUPPORTS_TMU
194
195config CPU_SH4
196    bool
197    select CPU_HAS_INTEVT
198    select CPU_HAS_SR_RB
199    select CPU_HAS_FPU if !CPU_SH4AL_DSP
200    select SYS_SUPPORTS_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_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    select PM_RUNTIME
232
233config CPU_HAS_PMU
234       depends on CPU_SH4 || CPU_SH4A
235       default y
236       bool
237
238if SUPERH32
239
240choice
241    prompt "Processor sub-type selection"
242
243#
244# Processor subtypes
245#
246
247# SH-2 Processor Support
248
249config CPU_SUBTYPE_SH7619
250    bool "Support SH7619 processor"
251    select CPU_SH2
252    select SYS_SUPPORTS_CMT
253
254# SH-2A Processor Support
255
256config CPU_SUBTYPE_SH7201
257    bool "Support SH7201 processor"
258    select CPU_SH2A
259    select CPU_HAS_FPU
260    select SYS_SUPPORTS_MTU2
261 
262config CPU_SUBTYPE_SH7203
263    bool "Support SH7203 processor"
264    select CPU_SH2A
265    select CPU_HAS_FPU
266    select SYS_SUPPORTS_CMT
267    select SYS_SUPPORTS_MTU2
268    select ARCH_WANT_OPTIONAL_GPIOLIB
269    select PINCTRL
270
271config CPU_SUBTYPE_SH7206
272    bool "Support SH7206 processor"
273    select CPU_SH2A
274    select SYS_SUPPORTS_CMT
275    select SYS_SUPPORTS_MTU2
276
277config CPU_SUBTYPE_SH7263
278    bool "Support SH7263 processor"
279    select CPU_SH2A
280    select CPU_HAS_FPU
281    select SYS_SUPPORTS_CMT
282    select SYS_SUPPORTS_MTU2
283
284config CPU_SUBTYPE_SH7264
285    bool "Support SH7264 processor"
286    select CPU_SH2A
287    select CPU_HAS_FPU
288    select SYS_SUPPORTS_CMT
289    select SYS_SUPPORTS_MTU2
290    select PINCTRL
291
292config CPU_SUBTYPE_SH7269
293    bool "Support SH7269 processor"
294    select CPU_SH2A
295    select CPU_HAS_FPU
296    select SYS_SUPPORTS_CMT
297    select SYS_SUPPORTS_MTU2
298    select PINCTRL
299
300config CPU_SUBTYPE_MXG
301    bool "Support MX-G processor"
302    select CPU_SH2A
303    select SYS_SUPPORTS_MTU2
304    help
305      Select MX-G if running on an R8A03022BG part.
306
307# SH-3 Processor Support
308
309config CPU_SUBTYPE_SH7705
310    bool "Support SH7705 processor"
311    select CPU_SH3
312
313config CPU_SUBTYPE_SH7706
314    bool "Support SH7706 processor"
315    select CPU_SH3
316    help
317      Select SH7706 if you have a 133 Mhz SH-3 HD6417706 CPU.
318
319config CPU_SUBTYPE_SH7707
320    bool "Support SH7707 processor"
321    select CPU_SH3
322    help
323      Select SH7707 if you have a 60 Mhz SH-3 HD6417707 CPU.
324
325config CPU_SUBTYPE_SH7708
326    bool "Support SH7708 processor"
327    select CPU_SH3
328    help
329      Select SH7708 if you have a 60 Mhz SH-3 HD6417708S or
330      if you have a 100 Mhz SH-3 HD6417708R CPU.
331
332config CPU_SUBTYPE_SH7709
333    bool "Support SH7709 processor"
334    select CPU_SH3
335    help
336      Select SH7709 if you have a 80 Mhz SH-3 HD6417709 CPU.
337
338config CPU_SUBTYPE_SH7710
339    bool "Support SH7710 processor"
340    select CPU_SH3
341    select CPU_HAS_DSP
342    help
343      Select SH7710 if you have a SH3-DSP SH7710 CPU.
344
345config CPU_SUBTYPE_SH7712
346    bool "Support SH7712 processor"
347    select CPU_SH3
348    select CPU_HAS_DSP
349    help
350      Select SH7712 if you have a SH3-DSP SH7712 CPU.
351
352config CPU_SUBTYPE_SH7720
353    bool "Support SH7720 processor"
354    select CPU_SH3
355    select CPU_HAS_DSP
356    select SYS_SUPPORTS_CMT
357    select ARCH_WANT_OPTIONAL_GPIOLIB
358    select USB_ARCH_HAS_OHCI
359    select USB_OHCI_SH if USB_OHCI_HCD
360    select PINCTRL
361    help
362      Select SH7720 if you have a SH3-DSP SH7720 CPU.
363
364config CPU_SUBTYPE_SH7721
365    bool "Support SH7721 processor"
366    select CPU_SH3
367    select CPU_HAS_DSP
368    select SYS_SUPPORTS_CMT
369    select USB_ARCH_HAS_OHCI
370    select USB_OHCI_SH if USB_OHCI_HCD
371    help
372      Select SH7721 if you have a SH3-DSP SH7721 CPU.
373
374# SH-4 Processor Support
375
376config CPU_SUBTYPE_SH7750
377    bool "Support SH7750 processor"
378    select CPU_SH4
379    help
380      Select SH7750 if you have a 200 Mhz SH-4 HD6417750 CPU.
381
382config CPU_SUBTYPE_SH7091
383    bool "Support SH7091 processor"
384    select CPU_SH4
385    help
386      Select SH7091 if you have an SH-4 based Sega device (such as
387      the Dreamcast, Naomi, and Naomi 2).
388
389config CPU_SUBTYPE_SH7750R
390    bool "Support SH7750R processor"
391    select CPU_SH4
392
393config CPU_SUBTYPE_SH7750S
394    bool "Support SH7750S processor"
395    select CPU_SH4
396
397config CPU_SUBTYPE_SH7751
398    bool "Support SH7751 processor"
399    select CPU_SH4
400    help
401      Select SH7751 if you have a 166 Mhz SH-4 HD6417751 CPU,
402      or if you have a HD6417751R CPU.
403
404config CPU_SUBTYPE_SH7751R
405    bool "Support SH7751R processor"
406    select CPU_SH4
407
408config CPU_SUBTYPE_SH7760
409    bool "Support SH7760 processor"
410    select CPU_SH4
411
412config CPU_SUBTYPE_SH4_202
413    bool "Support SH4-202 processor"
414    select CPU_SH4
415
416# SH-4A Processor Support
417
418config CPU_SUBTYPE_SH7723
419    bool "Support SH7723 processor"
420    select CPU_SH4A
421    select CPU_SHX2
422    select ARCH_SHMOBILE
423    select ARCH_SPARSEMEM_ENABLE
424    select SYS_SUPPORTS_CMT
425    select ARCH_WANT_OPTIONAL_GPIOLIB
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_CMT
437    select ARCH_WANT_OPTIONAL_GPIOLIB
438    select PINCTRL
439    help
440      Select SH7724 if you have an SH-MobileR2R CPU.
441
442config CPU_SUBTYPE_SH7734
443    bool "Support SH7734 processor"
444    select CPU_SH4A
445    select CPU_SHX2
446    select ARCH_WANT_OPTIONAL_GPIOLIB
447    select USB_ARCH_HAS_OHCI
448    select USB_ARCH_HAS_EHCI
449    select PINCTRL
450    help
451      Select SH7734 if you have a SH4A SH7734 CPU.
452
453config CPU_SUBTYPE_SH7757
454    bool "Support SH7757 processor"
455    select CPU_SH4A
456    select CPU_SHX2
457    select ARCH_WANT_OPTIONAL_GPIOLIB
458    select USB_ARCH_HAS_OHCI
459    select USB_ARCH_HAS_EHCI
460    select PINCTRL
461    help
462      Select SH7757 if you have a SH4A SH7757 CPU.
463
464config CPU_SUBTYPE_SH7763
465    bool "Support SH7763 processor"
466    select CPU_SH4A
467    select USB_ARCH_HAS_OHCI
468    select USB_OHCI_SH if USB_OHCI_HCD
469    help
470      Select SH7763 if you have a SH4A SH7763(R5S77631) CPU.
471
472config CPU_SUBTYPE_SH7770
473    bool "Support SH7770 processor"
474    select CPU_SH4A
475
476config CPU_SUBTYPE_SH7780
477    bool "Support SH7780 processor"
478    select CPU_SH4A
479
480config CPU_SUBTYPE_SH7785
481    bool "Support SH7785 processor"
482    select CPU_SH4A
483    select CPU_SHX2
484    select ARCH_SPARSEMEM_ENABLE
485    select SYS_SUPPORTS_NUMA
486    select ARCH_WANT_OPTIONAL_GPIOLIB
487    select PINCTRL
488
489config CPU_SUBTYPE_SH7786
490    bool "Support SH7786 processor"
491    select CPU_SH4A
492    select CPU_SHX3
493    select CPU_HAS_PTEAEX
494    select GENERIC_CLOCKEVENTS_BROADCAST if SMP
495    select ARCH_WANT_OPTIONAL_GPIOLIB
496    select USB_ARCH_HAS_OHCI
497    select USB_OHCI_SH if USB_OHCI_HCD
498    select USB_ARCH_HAS_EHCI
499    select USB_EHCI_SH if USB_EHCI_HCD
500    select PINCTRL
501
502config CPU_SUBTYPE_SHX3
503    bool "Support SH-X3 processor"
504    select CPU_SH4A
505    select CPU_SHX3
506    select GENERIC_CLOCKEVENTS_BROADCAST if SMP
507    select ARCH_REQUIRE_GPIOLIB
508    select PINCTRL
509
510# SH4AL-DSP Processor Support
511
512config CPU_SUBTYPE_SH7343
513    bool "Support SH7343 processor"
514    select CPU_SH4AL_DSP
515    select ARCH_SHMOBILE
516    select SYS_SUPPORTS_CMT
517
518config CPU_SUBTYPE_SH7722
519    bool "Support SH7722 processor"
520    select CPU_SH4AL_DSP
521    select CPU_SHX2
522    select ARCH_SHMOBILE
523    select ARCH_SPARSEMEM_ENABLE
524    select SYS_SUPPORTS_NUMA
525    select SYS_SUPPORTS_CMT
526    select ARCH_WANT_OPTIONAL_GPIOLIB
527    select PINCTRL
528
529config CPU_SUBTYPE_SH7366
530    bool "Support SH7366 processor"
531    select CPU_SH4AL_DSP
532    select CPU_SHX2
533    select ARCH_SHMOBILE
534    select ARCH_SPARSEMEM_ENABLE
535    select SYS_SUPPORTS_NUMA
536    select SYS_SUPPORTS_CMT
537
538endchoice
539
540endif
541
542if SUPERH64
543
544choice
545    prompt "Processor sub-type selection"
546
547# SH-5 Processor Support
548
549config CPU_SUBTYPE_SH5_101
550    bool "Support SH5-101 processor"
551    select CPU_SH5
552
553config CPU_SUBTYPE_SH5_103
554    bool "Support SH5-103 processor"
555    select CPU_SH5
556
557endchoice
558
559endif
560
561source "arch/sh/mm/Kconfig"
562 
563source "arch/sh/Kconfig.cpu"
564
565source "arch/sh/boards/Kconfig"
566
567menu "Timer and clock configuration"
568
569config SH_TIMER_TMU
570    bool "TMU timer driver"
571    depends on SYS_SUPPORTS_TMU
572    default y
573    help
574      This enables the build of the TMU timer driver.
575
576config SH_TIMER_CMT
577    bool "CMT timer driver"
578    depends on SYS_SUPPORTS_CMT
579    default y
580    help
581      This enables build of the CMT timer driver.
582
583config SH_TIMER_MTU2
584    bool "MTU2 timer driver"
585    depends on SYS_SUPPORTS_MTU2
586    default y
587    help
588      This enables build of the MTU2 timer driver.
589
590config SH_PCLK_FREQ
591    int "Peripheral clock frequency (in Hz)"
592    depends on SH_CLK_CPG_LEGACY
593    default "31250000" if CPU_SUBTYPE_SH7619
594    default "33333333" if CPU_SUBTYPE_SH7770 || \
595                  CPU_SUBTYPE_SH7760 || \
596                  CPU_SUBTYPE_SH7705 || \
597                  CPU_SUBTYPE_SH7203 || \
598                  CPU_SUBTYPE_SH7206 || \
599                  CPU_SUBTYPE_SH7263 || \
600                  CPU_SUBTYPE_MXG
601    default "60000000" if CPU_SUBTYPE_SH7751 || CPU_SUBTYPE_SH7751R
602    default "66000000" if CPU_SUBTYPE_SH4_202
603    default "50000000"
604    help
605      This option is used to specify the peripheral clock frequency.
606      This is necessary for determining the reference clock value on
607      platforms lacking an RTC.
608
609config SH_CLK_CPG
610    def_bool y
611
612config SH_CLK_CPG_LEGACY
613    depends on SH_CLK_CPG
614    def_bool y if !CPU_SUBTYPE_SH7785 && !ARCH_SHMOBILE && \
615              !CPU_SHX3 && !CPU_SUBTYPE_SH7757 && \
616              !CPU_SUBTYPE_SH7734 && !CPU_SUBTYPE_SH7264 && \
617              !CPU_SUBTYPE_SH7269
618
619endmenu
620
621menu "CPU Frequency scaling"
622source "drivers/cpufreq/Kconfig"
623endmenu
624
625source "arch/sh/drivers/Kconfig"
626
627endmenu
628
629menu "Kernel features"
630
631source kernel/Kconfig.hz
632
633config KEXEC
634    bool "kexec system call (EXPERIMENTAL)"
635    depends on SUPERH32 && MMU
636    help
637      kexec is a system call that implements the ability to shutdown your
638      current kernel, and to start another kernel. It is like a reboot
639      but it is independent of the system firmware. And like a reboot
640      you can start any kernel with it, not just Linux.
641
642      The name comes from the similarity to the exec system call.
643
644      It is an ongoing process to be certain the hardware in a machine
645      is properly shutdown, so do not be surprised if this code does not
646      initially work for you. It may help to enable device hotplugging
647      support. As of this writing the exact hardware interface is
648      strongly in flux, so no good recommendation can be made.
649
650config CRASH_DUMP
651    bool "kernel crash dumps (EXPERIMENTAL)"
652    depends on SUPERH32 && BROKEN_ON_SMP
653    help
654      Generate crash dump after being started by kexec.
655      This should be normally only set in special crash dump kernels
656      which are loaded in the main kernel with kexec-tools into
657      a specially reserved region and then later executed after
658      a crash by kdump/kexec. The crash dump kernel must be compiled
659      to a memory address not used by the main kernel using
660      PHYSICAL_START.
661
662      For more details see Documentation/kdump/kdump.txt
663
664config KEXEC_JUMP
665    bool "kexec jump (EXPERIMENTAL)"
666    depends on SUPERH32 && KEXEC && HIBERNATION
667    help
668      Jump between original kernel and kexeced kernel and invoke
669      code via KEXEC
670
671config PHYSICAL_START
672    hex "Physical address where the kernel is loaded" if (EXPERT || CRASH_DUMP)
673    default MEMORY_START
674    ---help---
675      This gives the physical address where the kernel is loaded
676      and is ordinarily the same as MEMORY_START.
677
678      Different values are primarily used in the case of kexec on panic
679      where the fail safe kernel needs to run at a different address
680      than the panic-ed kernel.
681
682config SECCOMP
683    bool "Enable seccomp to safely compute untrusted bytecode"
684    depends on PROC_FS
685    help
686      This kernel feature is useful for number crunching applications
687      that may need to compute untrusted bytecode during their
688      execution. By using pipes or other transports made available to
689      the process as file descriptors supporting the read/write
690      syscalls, it's possible to isolate those applications in
691      their own address space using seccomp. Once seccomp is
692      enabled via prctl, it cannot be disabled and the task is only
693      allowed to execute a few safe syscalls defined by each seccomp
694      mode.
695
696      If unsure, say N.
697
698config CC_STACKPROTECTOR
699    bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
700    depends on SUPERH32
701    help
702      This option turns on the -fstack-protector GCC feature. This
703      feature puts, at the beginning of functions, a canary value on
704      the stack just before the return address, and validates
705      the value just before actually returning. Stack based buffer
706      overflows (that need to overwrite this return address) now also
707      overwrite the canary, which gets detected and the attack is then
708      neutralized via a kernel panic.
709
710      This feature requires gcc version 4.2 or above.
711
712config SMP
713    bool "Symmetric multi-processing support"
714    depends on SYS_SUPPORTS_SMP
715    select USE_GENERIC_SMP_HELPERS
716    ---help---
717      This enables support for systems with more than one CPU. If you have
718      a system with only one CPU, like most personal computers, say N. If
719      you have a system with more than one CPU, say Y.
720
721      If you say N here, the kernel will run on single and multiprocessor
722      machines, but will use only one CPU of a multiprocessor machine. If
723      you say Y here, the kernel will run on many, but not all,
724      singleprocessor machines. On a singleprocessor machine, the kernel
725      will run faster if you say N here.
726
727      People using multiprocessor machines who say Y here should also say
728      Y to "Enhanced Real Time Clock Support", below.
729
730      See also <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO
731      available at <http://www.tldp.org/docs.html#howto>.
732
733      If you don't know what to do here, say N.
734
735config NR_CPUS
736    int "Maximum number of CPUs (2-32)"
737    range 2 32
738    depends on SMP
739    default "4" if CPU_SUBTYPE_SHX3
740    default "2"
741    help
742      This allows you to specify the maximum number of CPUs which this
743      kernel will support. The maximum supported value is 32 and the
744      minimum value which makes sense is 2.
745
746      This is purely to save memory - each supported CPU adds
747      approximately eight kilobytes to the kernel image.
748
749config HOTPLUG_CPU
750    bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
751    depends on SMP
752    help
753      Say Y here to experiment with turning CPUs off and on. CPUs
754      can be controlled through /sys/devices/system/cpu.
755
756source "kernel/Kconfig.preempt"
757
758config GUSA
759    def_bool y
760    depends on !SMP && SUPERH32
761    help
762      This enables support for gUSA (general UserSpace Atomicity).
763      This is the default implementation for both UP and non-ll/sc
764      CPUs, and is used by the libc, amongst others.
765
766      For additional information, design information can be found
767      in <http://lc.linux.or.jp/lc2002/papers/niibe0919p.pdf>.
768
769      This should only be disabled for special cases where alternate
770      atomicity implementations exist.
771
772config GUSA_RB
773    bool "Implement atomic operations by roll-back (gRB) (EXPERIMENTAL)"
774    depends on GUSA && CPU_SH3 || (CPU_SH4 && !CPU_SH4A)
775    help
776      Enabling this option will allow the kernel to implement some
777      atomic operations using a software implementation of load-locked/
778      store-conditional (LLSC). On machines which do not have hardware
779      LLSC, this should be more efficient than the other alternative of
780      disabling interrupts around the atomic sequence.
781
782config HW_PERF_EVENTS
783    bool "Enable hardware performance counter support for perf events"
784    depends on PERF_EVENTS && CPU_HAS_PMU
785    default y
786    help
787      Enable hardware performance counter support for perf events. If
788      disabled, perf events will use software events only.
789
790source "drivers/sh/Kconfig"
791
792endmenu
793
794menu "Boot options"
795
796config ZERO_PAGE_OFFSET
797    hex
798    default "0x00010000" if PAGE_SIZE_64KB || SH_RTS7751R2D || \
799                SH_7751_SOLUTION_ENGINE
800    default "0x00004000" if PAGE_SIZE_16KB || SH_SH03
801    default "0x00002000" if PAGE_SIZE_8KB
802    default "0x00001000"
803    help
804      This sets the default offset of zero page.
805
806config BOOT_LINK_OFFSET
807    hex
808    default "0x00210000" if SH_SHMIN
809    default "0x00400000" if SH_CAYMAN
810    default "0x00810000" if SH_7780_SOLUTION_ENGINE
811    default "0x009e0000" if SH_TITAN
812    default "0x01800000" if SH_SDK7780
813    default "0x02000000" if SH_EDOSK7760
814    default "0x00800000"
815    help
816      This option allows you to set the link address offset of the zImage.
817      This can be useful if you are on a board which has a small amount of
818      memory.
819
820config ENTRY_OFFSET
821    hex
822    default "0x00001000" if PAGE_SIZE_4KB
823    default "0x00002000" if PAGE_SIZE_8KB
824    default "0x00004000" if PAGE_SIZE_16KB
825    default "0x00010000" if PAGE_SIZE_64KB
826    default "0x00000000"
827
828config ROMIMAGE_MMCIF
829    bool "Include MMCIF loader in romImage (EXPERIMENTAL)"
830    depends on CPU_SUBTYPE_SH7724
831    help
832      Say Y here to include experimental MMCIF loading code in
833      romImage. With this enabled it is possible to write the romImage
834      kernel image to an MMC card and boot the kernel straight from
835      the reset vector. At reset the processor Mask ROM will load the
836      first part of the romImage which in turn loads the rest the kernel
837      image to RAM using the MMCIF hardware block.
838
839choice
840    prompt "Kernel command line"
841    optional
842    default CMDLINE_OVERWRITE
843    help
844      Setting this option allows the kernel command line arguments
845      to be set.
846
847config CMDLINE_OVERWRITE
848    bool "Overwrite bootloader kernel arguments"
849    help
850      Given string will overwrite any arguments passed in by
851      a bootloader.
852
853config CMDLINE_EXTEND
854    bool "Extend bootloader kernel arguments"
855    help
856      Given string will be concatenated with arguments passed in
857      by a bootloader.
858
859endchoice
860
861config CMDLINE
862    string "Kernel command line arguments string"
863    depends on CMDLINE_OVERWRITE || CMDLINE_EXTEND
864    default "console=ttySC1,115200"
865
866endmenu
867
868menu "Bus options"
869
870config SUPERHYWAY
871    tristate "SuperHyway Bus support"
872    depends on CPU_SUBTYPE_SH4_202
873
874config MAPLE
875    bool "Maple Bus support"
876    depends on SH_DREAMCAST
877    help
878     The Maple Bus is SEGA's serial communication bus for peripherals
879     on the Dreamcast. Without this bus support you won't be able to
880     get your Dreamcast keyboard etc to work, so most users
881     probably want to say 'Y' here, unless you are only using the
882     Dreamcast with a serial line terminal or a remote network
883     connection.
884
885config PCI
886    bool "PCI support"
887    depends on SYS_SUPPORTS_PCI
888    select PCI_DOMAINS
889    select GENERIC_PCI_IOMAP
890    select NO_GENERIC_PCI_IOPORT_MAP
891    help
892      Find out whether you have a PCI motherboard. PCI is the name of a
893      bus system, i.e. the way the CPU talks to the other stuff inside
894      your box. If you have PCI, say Y, otherwise N.
895
896config PCI_DOMAINS
897    bool
898
899source "drivers/pci/pcie/Kconfig"
900
901source "drivers/pci/Kconfig"
902
903source "drivers/pcmcia/Kconfig"
904
905source "drivers/pci/hotplug/Kconfig"
906
907endmenu
908
909menu "Executable file formats"
910
911source "fs/Kconfig.binfmt"
912
913endmenu
914
915menu "Power management options (EXPERIMENTAL)"
916
917source "kernel/power/Kconfig"
918
919source "drivers/cpuidle/Kconfig"
920
921endmenu
922
923source "net/Kconfig"
924
925source "drivers/Kconfig"
926
927source "fs/Kconfig"
928
929source "arch/sh/Kconfig.debug"
930
931source "security/Kconfig"
932
933source "crypto/Kconfig"
934
935source "lib/Kconfig"
936

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