Kconfig 20 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522523524525526527528529530531532533534535536537538539540541542543544545546547548549550551552553554555556557558559560561562563564565566567568569570571572573574575576577578579580581582583584585586587588589590591592593594595596597598599600601602603604605606607608609610611612613614615616617618619620621622623624625626627628629630631632633634635636637638639640641642643644645646647648649650651652653654655656657658659660661662663664665666667668669670671672673674675676677678679680681682683684685686687688689690691692693694695696697698699700701702703704705706707708709710711712713714715716717718719720721722723724725726727728729730731732733734735736737738739740741742743744745746747748749750751752753754755756757758759760761762763764765766767768769770771772773774775776777778779780781782783784785786787788789790791792793794795796797798799800801802803804805806807808809810811812813814815816817818819820821822823824825826827828829830831832833834835836837838839840841842843844845846847848849850851852853854855856857858859860861862863864865866867868869870871872873874875876877878879880881882883884885886887888889890891892893894895896897898899900901902903904
  1. config SUPERH
  2. def_bool y
  3. select EMBEDDED
  4. select HAVE_CLK
  5. select HAVE_IDE if HAS_IOPORT
  6. select HAVE_MEMBLOCK
  7. select HAVE_OPROFILE
  8. select HAVE_GENERIC_DMA_COHERENT
  9. select HAVE_ARCH_TRACEHOOK
  10. select HAVE_DMA_API_DEBUG
  11. select HAVE_DMA_ATTRS
  12. select HAVE_IRQ_WORK
  13. select HAVE_PERF_EVENTS
  14. select PERF_USE_VMALLOC
  15. select HAVE_KERNEL_GZIP
  16. select HAVE_KERNEL_BZIP2
  17. select HAVE_KERNEL_LZMA
  18. select HAVE_KERNEL_LZO
  19. select HAVE_SYSCALL_TRACEPOINTS
  20. select HAVE_REGS_AND_STACK_ACCESS_API
  21. select HAVE_GENERIC_HARDIRQS
  22. select HAVE_SPARSE_IRQ
  23. select RTC_LIB
  24. select GENERIC_ATOMIC64
  25. select GENERIC_HARDIRQS_NO_DEPRECATED
  26. help
  27. The SuperH is a RISC processor targeted for use in embedded systems
  28. and consumer electronics; it was also used in the Sega Dreamcast
  29. gaming console. The SuperH port has a home page at
  30. <http://www.linux-sh.org/>.
  31. config SUPERH32
  32. def_bool ARCH = "sh"
  33. select HAVE_KPROBES
  34. select HAVE_KRETPROBES
  35. select HAVE_IOREMAP_PROT if MMU && !X2TLB
  36. select HAVE_FUNCTION_TRACER
  37. select HAVE_FTRACE_MCOUNT_RECORD
  38. select HAVE_DYNAMIC_FTRACE
  39. select HAVE_FUNCTION_TRACE_MCOUNT_TEST
  40. select HAVE_FTRACE_NMI_ENTER if DYNAMIC_FTRACE
  41. select HAVE_FUNCTION_GRAPH_TRACER
  42. select HAVE_ARCH_KGDB
  43. select HAVE_HW_BREAKPOINT
  44. select HAVE_MIXED_BREAKPOINTS_REGS
  45. select PERF_EVENTS
  46. select ARCH_HIBERNATION_POSSIBLE if MMU
  47. select SPARSE_IRQ
  48. config SUPERH64
  49. def_bool ARCH = "sh64"
  50. config ARCH_DEFCONFIG
  51. string
  52. default "arch/sh/configs/shx3_defconfig" if SUPERH32
  53. default "arch/sh/configs/cayman_defconfig" if SUPERH64
  54. config RWSEM_GENERIC_SPINLOCK
  55. def_bool y
  56. config RWSEM_XCHGADD_ALGORITHM
  57. bool
  58. config GENERIC_BUG
  59. def_bool y
  60. depends on BUG && SUPERH32
  61. config GENERIC_CSUM
  62. def_bool y
  63. depends on SUPERH64
  64. config GENERIC_FIND_NEXT_BIT
  65. def_bool y
  66. config GENERIC_HWEIGHT
  67. def_bool y
  68. config IRQ_PER_CPU
  69. def_bool y
  70. config GENERIC_GPIO
  71. def_bool n
  72. config GENERIC_CALIBRATE_DELAY
  73. bool
  74. config GENERIC_IOMAP
  75. bool
  76. config GENERIC_CLOCKEVENTS
  77. def_bool y
  78. config GENERIC_CLOCKEVENTS_BROADCAST
  79. bool
  80. config GENERIC_CMOS_UPDATE
  81. def_bool y
  82. depends on SH_SH03 || SH_DREAMCAST
  83. config GENERIC_LOCKBREAK
  84. def_bool y
  85. depends on SMP && PREEMPT
  86. config SYS_SUPPORTS_PM
  87. bool
  88. depends on !SMP
  89. config ARCH_SUSPEND_POSSIBLE
  90. def_bool n
  91. config ARCH_HIBERNATION_POSSIBLE
  92. def_bool n
  93. config SYS_SUPPORTS_APM_EMULATION
  94. bool
  95. select ARCH_SUSPEND_POSSIBLE
  96. config SYS_SUPPORTS_HUGETLBFS
  97. bool
  98. config SYS_SUPPORTS_SMP
  99. bool
  100. config SYS_SUPPORTS_NUMA
  101. bool
  102. config SYS_SUPPORTS_PCI
  103. bool
  104. config SYS_SUPPORTS_CMT
  105. bool
  106. config SYS_SUPPORTS_MTU2
  107. bool
  108. config SYS_SUPPORTS_TMU
  109. bool
  110. config STACKTRACE_SUPPORT
  111. def_bool y
  112. config LOCKDEP_SUPPORT
  113. def_bool y
  114. config HAVE_LATENCYTOP_SUPPORT
  115. def_bool y
  116. config ARCH_HAS_ILOG2_U32
  117. def_bool n
  118. config ARCH_HAS_ILOG2_U64
  119. def_bool n
  120. config ARCH_NO_VIRT_TO_BUS
  121. def_bool y
  122. config ARCH_HAS_DEFAULT_IDLE
  123. def_bool y
  124. config ARCH_HAS_CPU_IDLE_WAIT
  125. def_bool y
  126. config NO_IOPORT
  127. bool
  128. config IO_TRAPPED
  129. bool
  130. config DMA_COHERENT
  131. bool
  132. config DMA_NONCOHERENT
  133. def_bool !DMA_COHERENT
  134. config NEED_DMA_MAP_STATE
  135. def_bool DMA_NONCOHERENT
  136. config NEED_SG_DMA_LENGTH
  137. def_bool y
  138. source "init/Kconfig"
  139. source "kernel/Kconfig.freezer"
  140. menu "System type"
  141. #
  142. # Processor families
  143. #
  144. config CPU_SH2
  145. bool
  146. config CPU_SH2A
  147. bool
  148. select CPU_SH2
  149. config CPU_SH3
  150. bool
  151. select CPU_HAS_INTEVT
  152. select CPU_HAS_SR_RB
  153. select SYS_SUPPORTS_TMU
  154. config CPU_SH4
  155. bool
  156. select CPU_HAS_INTEVT
  157. select CPU_HAS_SR_RB
  158. select CPU_HAS_FPU if !CPU_SH4AL_DSP
  159. select SYS_SUPPORTS_TMU
  160. select SYS_SUPPORTS_HUGETLBFS if MMU
  161. config CPU_SH4A
  162. bool
  163. select CPU_SH4
  164. config CPU_SH4AL_DSP
  165. bool
  166. select CPU_SH4A
  167. select CPU_HAS_DSP
  168. config CPU_SH5
  169. bool
  170. select CPU_HAS_FPU
  171. select SYS_SUPPORTS_TMU
  172. select SYS_SUPPORTS_HUGETLBFS if MMU
  173. config CPU_SHX2
  174. bool
  175. config CPU_SHX3
  176. bool
  177. select DMA_COHERENT
  178. select SYS_SUPPORTS_SMP
  179. select SYS_SUPPORTS_NUMA
  180. config ARCH_SHMOBILE
  181. bool
  182. select ARCH_SUSPEND_POSSIBLE
  183. select PM
  184. select PM_RUNTIME
  185. config CPU_HAS_PMU
  186. depends on CPU_SH4 || CPU_SH4A
  187. default y
  188. bool
  189. if SUPERH32
  190. choice
  191. prompt "Processor sub-type selection"
  192. #
  193. # Processor subtypes
  194. #
  195. # SH-2 Processor Support
  196. config CPU_SUBTYPE_SH7619
  197. bool "Support SH7619 processor"
  198. select CPU_SH2
  199. select SYS_SUPPORTS_CMT
  200. # SH-2A Processor Support
  201. config CPU_SUBTYPE_SH7201
  202. bool "Support SH7201 processor"
  203. select CPU_SH2A
  204. select CPU_HAS_FPU
  205. select SYS_SUPPORTS_MTU2
  206. config CPU_SUBTYPE_SH7203
  207. bool "Support SH7203 processor"
  208. select CPU_SH2A
  209. select CPU_HAS_FPU
  210. select SYS_SUPPORTS_CMT
  211. select SYS_SUPPORTS_MTU2
  212. config CPU_SUBTYPE_SH7206
  213. bool "Support SH7206 processor"
  214. select CPU_SH2A
  215. select SYS_SUPPORTS_CMT
  216. select SYS_SUPPORTS_MTU2
  217. config CPU_SUBTYPE_SH7263
  218. bool "Support SH7263 processor"
  219. select CPU_SH2A
  220. select CPU_HAS_FPU
  221. select SYS_SUPPORTS_CMT
  222. select SYS_SUPPORTS_MTU2
  223. config CPU_SUBTYPE_MXG
  224. bool "Support MX-G processor"
  225. select CPU_SH2A
  226. select SYS_SUPPORTS_MTU2
  227. help
  228. Select MX-G if running on an R8A03022BG part.
  229. # SH-3 Processor Support
  230. config CPU_SUBTYPE_SH7705
  231. bool "Support SH7705 processor"
  232. select CPU_SH3
  233. config CPU_SUBTYPE_SH7706
  234. bool "Support SH7706 processor"
  235. select CPU_SH3
  236. help
  237. Select SH7706 if you have a 133 Mhz SH-3 HD6417706 CPU.
  238. config CPU_SUBTYPE_SH7707
  239. bool "Support SH7707 processor"
  240. select CPU_SH3
  241. help
  242. Select SH7707 if you have a 60 Mhz SH-3 HD6417707 CPU.
  243. config CPU_SUBTYPE_SH7708
  244. bool "Support SH7708 processor"
  245. select CPU_SH3
  246. help
  247. Select SH7708 if you have a 60 Mhz SH-3 HD6417708S or
  248. if you have a 100 Mhz SH-3 HD6417708R CPU.
  249. config CPU_SUBTYPE_SH7709
  250. bool "Support SH7709 processor"
  251. select CPU_SH3
  252. help
  253. Select SH7709 if you have a 80 Mhz SH-3 HD6417709 CPU.
  254. config CPU_SUBTYPE_SH7710
  255. bool "Support SH7710 processor"
  256. select CPU_SH3
  257. select CPU_HAS_DSP
  258. help
  259. Select SH7710 if you have a SH3-DSP SH7710 CPU.
  260. config CPU_SUBTYPE_SH7712
  261. bool "Support SH7712 processor"
  262. select CPU_SH3
  263. select CPU_HAS_DSP
  264. help
  265. Select SH7712 if you have a SH3-DSP SH7712 CPU.
  266. config CPU_SUBTYPE_SH7720
  267. bool "Support SH7720 processor"
  268. select CPU_SH3
  269. select CPU_HAS_DSP
  270. select SYS_SUPPORTS_CMT
  271. help
  272. Select SH7720 if you have a SH3-DSP SH7720 CPU.
  273. config CPU_SUBTYPE_SH7721
  274. bool "Support SH7721 processor"
  275. select CPU_SH3
  276. select CPU_HAS_DSP
  277. select SYS_SUPPORTS_CMT
  278. help
  279. Select SH7721 if you have a SH3-DSP SH7721 CPU.
  280. # SH-4 Processor Support
  281. config CPU_SUBTYPE_SH7750
  282. bool "Support SH7750 processor"
  283. select CPU_SH4
  284. help
  285. Select SH7750 if you have a 200 Mhz SH-4 HD6417750 CPU.
  286. config CPU_SUBTYPE_SH7091
  287. bool "Support SH7091 processor"
  288. select CPU_SH4
  289. help
  290. Select SH7091 if you have an SH-4 based Sega device (such as
  291. the Dreamcast, Naomi, and Naomi 2).
  292. config CPU_SUBTYPE_SH7750R
  293. bool "Support SH7750R processor"
  294. select CPU_SH4
  295. config CPU_SUBTYPE_SH7750S
  296. bool "Support SH7750S processor"
  297. select CPU_SH4
  298. config CPU_SUBTYPE_SH7751
  299. bool "Support SH7751 processor"
  300. select CPU_SH4
  301. help
  302. Select SH7751 if you have a 166 Mhz SH-4 HD6417751 CPU,
  303. or if you have a HD6417751R CPU.
  304. config CPU_SUBTYPE_SH7751R
  305. bool "Support SH7751R processor"
  306. select CPU_SH4
  307. config CPU_SUBTYPE_SH7760
  308. bool "Support SH7760 processor"
  309. select CPU_SH4
  310. config CPU_SUBTYPE_SH4_202
  311. bool "Support SH4-202 processor"
  312. select CPU_SH4
  313. # SH-4A Processor Support
  314. config CPU_SUBTYPE_SH7723
  315. bool "Support SH7723 processor"
  316. select CPU_SH4A
  317. select CPU_SHX2
  318. select ARCH_SHMOBILE
  319. select ARCH_SPARSEMEM_ENABLE
  320. select SYS_SUPPORTS_CMT
  321. help
  322. Select SH7723 if you have an SH-MobileR2 CPU.
  323. config CPU_SUBTYPE_SH7724
  324. bool "Support SH7724 processor"
  325. select CPU_SH4A
  326. select CPU_SHX2
  327. select ARCH_SHMOBILE
  328. select ARCH_SPARSEMEM_ENABLE
  329. select SYS_SUPPORTS_CMT
  330. help
  331. Select SH7724 if you have an SH-MobileR2R CPU.
  332. config CPU_SUBTYPE_SH7757
  333. bool "Support SH7757 processor"
  334. select CPU_SH4A
  335. select CPU_SHX2
  336. help
  337. Select SH7757 if you have a SH4A SH7757 CPU.
  338. config CPU_SUBTYPE_SH7763
  339. bool "Support SH7763 processor"
  340. select CPU_SH4A
  341. help
  342. Select SH7763 if you have a SH4A SH7763(R5S77631) CPU.
  343. config CPU_SUBTYPE_SH7770
  344. bool "Support SH7770 processor"
  345. select CPU_SH4A
  346. config CPU_SUBTYPE_SH7780
  347. bool "Support SH7780 processor"
  348. select CPU_SH4A
  349. config CPU_SUBTYPE_SH7785
  350. bool "Support SH7785 processor"
  351. select CPU_SH4A
  352. select CPU_SHX2
  353. select ARCH_SPARSEMEM_ENABLE
  354. select SYS_SUPPORTS_NUMA
  355. config CPU_SUBTYPE_SH7786
  356. bool "Support SH7786 processor"
  357. select CPU_SH4A
  358. select CPU_SHX3
  359. select CPU_HAS_PTEAEX
  360. select GENERIC_CLOCKEVENTS_BROADCAST if SMP
  361. config CPU_SUBTYPE_SHX3
  362. bool "Support SH-X3 processor"
  363. select CPU_SH4A
  364. select CPU_SHX3
  365. select GENERIC_CLOCKEVENTS_BROADCAST if SMP
  366. select ARCH_REQUIRE_GPIOLIB
  367. # SH4AL-DSP Processor Support
  368. config CPU_SUBTYPE_SH7343
  369. bool "Support SH7343 processor"
  370. select CPU_SH4AL_DSP
  371. select ARCH_SHMOBILE
  372. select SYS_SUPPORTS_CMT
  373. config CPU_SUBTYPE_SH7722
  374. bool "Support SH7722 processor"
  375. select CPU_SH4AL_DSP
  376. select CPU_SHX2
  377. select ARCH_SHMOBILE
  378. select ARCH_SPARSEMEM_ENABLE
  379. select SYS_SUPPORTS_NUMA
  380. select SYS_SUPPORTS_CMT
  381. config CPU_SUBTYPE_SH7366
  382. bool "Support SH7366 processor"
  383. select CPU_SH4AL_DSP
  384. select CPU_SHX2
  385. select ARCH_SHMOBILE
  386. select ARCH_SPARSEMEM_ENABLE
  387. select SYS_SUPPORTS_NUMA
  388. select SYS_SUPPORTS_CMT
  389. endchoice
  390. endif
  391. if SUPERH64
  392. choice
  393. prompt "Processor sub-type selection"
  394. # SH-5 Processor Support
  395. config CPU_SUBTYPE_SH5_101
  396. bool "Support SH5-101 processor"
  397. select CPU_SH5
  398. config CPU_SUBTYPE_SH5_103
  399. bool "Support SH5-103 processor"
  400. select CPU_SH5
  401. endchoice
  402. endif
  403. source "arch/sh/mm/Kconfig"
  404. source "arch/sh/Kconfig.cpu"
  405. source "arch/sh/boards/Kconfig"
  406. menu "Timer and clock configuration"
  407. config SH_TIMER_TMU
  408. bool "TMU timer driver"
  409. depends on SYS_SUPPORTS_TMU
  410. default y
  411. help
  412. This enables the build of the TMU timer driver.
  413. config SH_TIMER_CMT
  414. bool "CMT timer driver"
  415. depends on SYS_SUPPORTS_CMT
  416. default y
  417. help
  418. This enables build of the CMT timer driver.
  419. config SH_TIMER_MTU2
  420. bool "MTU2 timer driver"
  421. depends on SYS_SUPPORTS_MTU2
  422. default y
  423. help
  424. This enables build of the MTU2 timer driver.
  425. config SH_PCLK_FREQ
  426. int "Peripheral clock frequency (in Hz)"
  427. depends on SH_CLK_CPG_LEGACY
  428. default "31250000" if CPU_SUBTYPE_SH7619
  429. default "33333333" if CPU_SUBTYPE_SH7770 || \
  430. CPU_SUBTYPE_SH7760 || \
  431. CPU_SUBTYPE_SH7705 || \
  432. CPU_SUBTYPE_SH7203 || \
  433. CPU_SUBTYPE_SH7206 || \
  434. CPU_SUBTYPE_SH7263 || \
  435. CPU_SUBTYPE_MXG
  436. default "60000000" if CPU_SUBTYPE_SH7751 || CPU_SUBTYPE_SH7751R
  437. default "66000000" if CPU_SUBTYPE_SH4_202
  438. default "50000000"
  439. help
  440. This option is used to specify the peripheral clock frequency.
  441. This is necessary for determining the reference clock value on
  442. platforms lacking an RTC.
  443. config SH_CLK_CPG
  444. def_bool y
  445. config SH_CLK_CPG_LEGACY
  446. depends on SH_CLK_CPG
  447. def_bool y if !CPU_SUBTYPE_SH7785 && !ARCH_SHMOBILE && \
  448. !CPU_SHX3 && !CPU_SUBTYPE_SH7757
  449. config SH_CLK_MD
  450. int "CPU Mode Pin Setting"
  451. depends on CPU_SH2
  452. default 6 if CPU_SUBTYPE_SH7206
  453. default 5 if CPU_SUBTYPE_SH7619
  454. default 0
  455. help
  456. MD2 - MD0 pin setting.
  457. source "kernel/time/Kconfig"
  458. endmenu
  459. menu "CPU Frequency scaling"
  460. source "drivers/cpufreq/Kconfig"
  461. config SH_CPU_FREQ
  462. tristate "SuperH CPU Frequency driver"
  463. depends on CPU_FREQ
  464. select CPU_FREQ_TABLE
  465. help
  466. This adds the cpufreq driver for SuperH. Any CPU that supports
  467. clock rate rounding through the clock framework can use this
  468. driver. While it will make the kernel slightly larger, this is
  469. harmless for CPUs that don't support rate rounding. The driver
  470. will also generate a notice in the boot log before disabling
  471. itself if the CPU in question is not capable of rate rounding.
  472. For details, take a look at <file:Documentation/cpu-freq>.
  473. If unsure, say N.
  474. endmenu
  475. source "arch/sh/drivers/Kconfig"
  476. endmenu
  477. menu "Kernel features"
  478. source kernel/Kconfig.hz
  479. config KEXEC
  480. bool "kexec system call (EXPERIMENTAL)"
  481. depends on SUPERH32 && EXPERIMENTAL && MMU
  482. help
  483. kexec is a system call that implements the ability to shutdown your
  484. current kernel, and to start another kernel. It is like a reboot
  485. but it is independent of the system firmware. And like a reboot
  486. you can start any kernel with it, not just Linux.
  487. The name comes from the similarity to the exec system call.
  488. It is an ongoing process to be certain the hardware in a machine
  489. is properly shutdown, so do not be surprised if this code does not
  490. initially work for you. It may help to enable device hotplugging
  491. support. As of this writing the exact hardware interface is
  492. strongly in flux, so no good recommendation can be made.
  493. config CRASH_DUMP
  494. bool "kernel crash dumps (EXPERIMENTAL)"
  495. depends on SUPERH32 && EXPERIMENTAL && BROKEN_ON_SMP
  496. help
  497. Generate crash dump after being started by kexec.
  498. This should be normally only set in special crash dump kernels
  499. which are loaded in the main kernel with kexec-tools into
  500. a specially reserved region and then later executed after
  501. a crash by kdump/kexec. The crash dump kernel must be compiled
  502. to a memory address not used by the main kernel using
  503. MEMORY_START.
  504. For more details see Documentation/kdump/kdump.txt
  505. config KEXEC_JUMP
  506. bool "kexec jump (EXPERIMENTAL)"
  507. depends on SUPERH32 && KEXEC && HIBERNATION && EXPERIMENTAL
  508. help
  509. Jump between original kernel and kexeced kernel and invoke
  510. code via KEXEC
  511. config SECCOMP
  512. bool "Enable seccomp to safely compute untrusted bytecode"
  513. depends on PROC_FS
  514. help
  515. This kernel feature is useful for number crunching applications
  516. that may need to compute untrusted bytecode during their
  517. execution. By using pipes or other transports made available to
  518. the process as file descriptors supporting the read/write
  519. syscalls, it's possible to isolate those applications in
  520. their own address space using seccomp. Once seccomp is
  521. enabled via prctl, it cannot be disabled and the task is only
  522. allowed to execute a few safe syscalls defined by each seccomp
  523. mode.
  524. If unsure, say N.
  525. config SMP
  526. bool "Symmetric multi-processing support"
  527. depends on SYS_SUPPORTS_SMP
  528. select USE_GENERIC_SMP_HELPERS
  529. ---help---
  530. This enables support for systems with more than one CPU. If you have
  531. a system with only one CPU, like most personal computers, say N. If
  532. you have a system with more than one CPU, say Y.
  533. If you say N here, the kernel will run on single and multiprocessor
  534. machines, but will use only one CPU of a multiprocessor machine. If
  535. you say Y here, the kernel will run on many, but not all,
  536. singleprocessor machines. On a singleprocessor machine, the kernel
  537. will run faster if you say N here.
  538. People using multiprocessor machines who say Y here should also say
  539. Y to "Enhanced Real Time Clock Support", below.
  540. See also <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO
  541. available at <http://www.tldp.org/docs.html#howto>.
  542. If you don't know what to do here, say N.
  543. config NR_CPUS
  544. int "Maximum number of CPUs (2-32)"
  545. range 2 32
  546. depends on SMP
  547. default "4" if CPU_SUBTYPE_SHX3
  548. default "2"
  549. help
  550. This allows you to specify the maximum number of CPUs which this
  551. kernel will support. The maximum supported value is 32 and the
  552. minimum value which makes sense is 2.
  553. This is purely to save memory - each supported CPU adds
  554. approximately eight kilobytes to the kernel image.
  555. config HOTPLUG_CPU
  556. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  557. depends on SMP && HOTPLUG && EXPERIMENTAL
  558. help
  559. Say Y here to experiment with turning CPUs off and on. CPUs
  560. can be controlled through /sys/devices/system/cpu.
  561. source "kernel/Kconfig.preempt"
  562. config GUSA
  563. def_bool y
  564. depends on !SMP && SUPERH32
  565. help
  566. This enables support for gUSA (general UserSpace Atomicity).
  567. This is the default implementation for both UP and non-ll/sc
  568. CPUs, and is used by the libc, amongst others.
  569. For additional information, design information can be found
  570. in <http://lc.linux.or.jp/lc2002/papers/niibe0919p.pdf>.
  571. This should only be disabled for special cases where alternate
  572. atomicity implementations exist.
  573. config GUSA_RB
  574. bool "Implement atomic operations by roll-back (gRB) (EXPERIMENTAL)"
  575. depends on GUSA && CPU_SH3 || (CPU_SH4 && !CPU_SH4A)
  576. help
  577. Enabling this option will allow the kernel to implement some
  578. atomic operations using a software implementation of load-locked/
  579. store-conditional (LLSC). On machines which do not have hardware
  580. LLSC, this should be more efficient than the other alternative of
  581. disabling interrupts around the atomic sequence.
  582. config HW_PERF_EVENTS
  583. bool "Enable hardware performance counter support for perf events"
  584. depends on PERF_EVENTS && CPU_HAS_PMU
  585. default y
  586. help
  587. Enable hardware performance counter support for perf events. If
  588. disabled, perf events will use software events only.
  589. source "drivers/sh/Kconfig"
  590. endmenu
  591. menu "Boot options"
  592. config ZERO_PAGE_OFFSET
  593. hex
  594. default "0x00010000" if PAGE_SIZE_64KB || SH_RTS7751R2D || \
  595. SH_7751_SOLUTION_ENGINE
  596. default "0x00004000" if PAGE_SIZE_16KB || SH_SH03
  597. default "0x00002000" if PAGE_SIZE_8KB
  598. default "0x00001000"
  599. help
  600. This sets the default offset of zero page.
  601. config BOOT_LINK_OFFSET
  602. hex
  603. default "0x00210000" if SH_SHMIN
  604. default "0x00400000" if SH_CAYMAN
  605. default "0x00810000" if SH_7780_SOLUTION_ENGINE
  606. default "0x009e0000" if SH_TITAN
  607. default "0x01800000" if SH_SDK7780
  608. default "0x02000000" if SH_EDOSK7760
  609. default "0x00800000"
  610. help
  611. This option allows you to set the link address offset of the zImage.
  612. This can be useful if you are on a board which has a small amount of
  613. memory.
  614. config ENTRY_OFFSET
  615. hex
  616. default "0x00001000" if PAGE_SIZE_4KB
  617. default "0x00002000" if PAGE_SIZE_8KB
  618. default "0x00004000" if PAGE_SIZE_16KB
  619. default "0x00010000" if PAGE_SIZE_64KB
  620. default "0x00000000"
  621. config ROMIMAGE_MMCIF
  622. bool "Include MMCIF loader in romImage (EXPERIMENTAL)"
  623. depends on CPU_SUBTYPE_SH7724 && EXPERIMENTAL
  624. help
  625. Say Y here to include experimental MMCIF loading code in
  626. romImage. With this enabled it is possible to write the romImage
  627. kernel image to an MMC card and boot the kernel straight from
  628. the reset vector. At reset the processor Mask ROM will load the
  629. first part of the romImage which in turn loads the rest the kernel
  630. image to RAM using the MMCIF hardware block.
  631. choice
  632. prompt "Kernel command line"
  633. optional
  634. default CMDLINE_OVERWRITE
  635. help
  636. Setting this option allows the kernel command line arguments
  637. to be set.
  638. config CMDLINE_OVERWRITE
  639. bool "Overwrite bootloader kernel arguments"
  640. help
  641. Given string will overwrite any arguments passed in by
  642. a bootloader.
  643. config CMDLINE_EXTEND
  644. bool "Extend bootloader kernel arguments"
  645. help
  646. Given string will be concatenated with arguments passed in
  647. by a bootloader.
  648. endchoice
  649. config CMDLINE
  650. string "Kernel command line arguments string"
  651. depends on CMDLINE_OVERWRITE || CMDLINE_EXTEND
  652. default "console=ttySC1,115200"
  653. endmenu
  654. menu "Bus options"
  655. config SUPERHYWAY
  656. tristate "SuperHyway Bus support"
  657. depends on CPU_SUBTYPE_SH4_202
  658. config MAPLE
  659. bool "Maple Bus support"
  660. depends on SH_DREAMCAST
  661. help
  662. The Maple Bus is SEGA's serial communication bus for peripherals
  663. on the Dreamcast. Without this bus support you won't be able to
  664. get your Dreamcast keyboard etc to work, so most users
  665. probably want to say 'Y' here, unless you are only using the
  666. Dreamcast with a serial line terminal or a remote network
  667. connection.
  668. config PCI
  669. bool "PCI support"
  670. depends on SYS_SUPPORTS_PCI
  671. select PCI_DOMAINS
  672. help
  673. Find out whether you have a PCI motherboard. PCI is the name of a
  674. bus system, i.e. the way the CPU talks to the other stuff inside
  675. your box. If you have PCI, say Y, otherwise N.
  676. config PCI_DOMAINS
  677. bool
  678. source "drivers/pci/pcie/Kconfig"
  679. source "drivers/pci/Kconfig"
  680. source "drivers/pcmcia/Kconfig"
  681. source "drivers/pci/hotplug/Kconfig"
  682. endmenu
  683. menu "Executable file formats"
  684. source "fs/Kconfig.binfmt"
  685. endmenu
  686. menu "Power management options (EXPERIMENTAL)"
  687. depends on EXPERIMENTAL
  688. source "kernel/power/Kconfig"
  689. source "drivers/cpuidle/Kconfig"
  690. endmenu
  691. source "net/Kconfig"
  692. source "drivers/Kconfig"
  693. source "fs/Kconfig"
  694. source "arch/sh/Kconfig.debug"
  695. source "security/Kconfig"
  696. source "crypto/Kconfig"
  697. menuconfig VIRTUALIZATION
  698. bool "Virtualization"
  699. default n
  700. ---help---
  701. Say Y here to get to see options for using your Linux host to run other
  702. operating systems inside virtual machines (guests).
  703. This option alone does not add any kernel code.
  704. If you say N, all options in this submenu will be skipped and disabled.
  705. if VIRTUALIZATION
  706. source drivers/virtio/Kconfig
  707. endif # VIRTUALIZATION
  708. source "lib/Kconfig"