Kconfig 22 KB

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  1. config 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_IRQ_WORK
  15. select HAVE_PERF_EVENTS
  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_KERNEL_GZIP
  20. select HAVE_KERNEL_BZIP2
  21. select HAVE_KERNEL_LZMA
  22. select HAVE_KERNEL_XZ
  23. select HAVE_KERNEL_LZO
  24. select HAVE_SYSCALL_TRACEPOINTS
  25. select HAVE_REGS_AND_STACK_ACCESS_API
  26. select HAVE_GENERIC_HARDIRQS
  27. select MAY_HAVE_SPARSE_IRQ
  28. select IRQ_FORCED_THREADING
  29. select RTC_LIB
  30. select GENERIC_ATOMIC64
  31. select GENERIC_IRQ_SHOW
  32. select GENERIC_SMP_IDLE_THREAD
  33. select GENERIC_CLOCKEVENTS
  34. select GENERIC_CMOS_UPDATE if SH_SH03 || SH_DREAMCAST
  35. select GENERIC_STRNCPY_FROM_USER
  36. select GENERIC_STRNLEN_USER
  37. help
  38. The SuperH is a RISC processor targeted for use in embedded systems
  39. and consumer electronics; it was also used in the Sega Dreamcast
  40. gaming console. The SuperH port has a home page at
  41. <http://www.linux-sh.org/>.
  42. config SUPERH32
  43. def_bool ARCH = "sh"
  44. select HAVE_KPROBES
  45. select HAVE_KRETPROBES
  46. select HAVE_IOREMAP_PROT if MMU && !X2TLB
  47. select HAVE_FUNCTION_TRACER
  48. select HAVE_FTRACE_MCOUNT_RECORD
  49. select HAVE_DYNAMIC_FTRACE
  50. select HAVE_FUNCTION_TRACE_MCOUNT_TEST
  51. select HAVE_FTRACE_NMI_ENTER if DYNAMIC_FTRACE
  52. select HAVE_FUNCTION_GRAPH_TRACER
  53. select HAVE_ARCH_KGDB
  54. select HAVE_HW_BREAKPOINT
  55. select HAVE_MIXED_BREAKPOINTS_REGS
  56. select PERF_EVENTS
  57. select ARCH_HIBERNATION_POSSIBLE if MMU
  58. select SPARSE_IRQ
  59. config SUPERH64
  60. def_bool ARCH = "sh64"
  61. config ARCH_DEFCONFIG
  62. string
  63. default "arch/sh/configs/shx3_defconfig" if SUPERH32
  64. default "arch/sh/configs/cayman_defconfig" if SUPERH64
  65. config RWSEM_GENERIC_SPINLOCK
  66. def_bool y
  67. config RWSEM_XCHGADD_ALGORITHM
  68. bool
  69. config GENERIC_BUG
  70. def_bool y
  71. depends on BUG && SUPERH32
  72. config GENERIC_CSUM
  73. def_bool y
  74. depends on SUPERH64
  75. config GENERIC_HWEIGHT
  76. def_bool y
  77. config IRQ_PER_CPU
  78. def_bool y
  79. config GENERIC_GPIO
  80. def_bool n
  81. config GENERIC_CALIBRATE_DELAY
  82. bool
  83. config GENERIC_LOCKBREAK
  84. def_bool y
  85. depends on SMP && PREEMPT
  86. config ARCH_SUSPEND_POSSIBLE
  87. def_bool n
  88. config ARCH_HIBERNATION_POSSIBLE
  89. def_bool n
  90. config SYS_SUPPORTS_APM_EMULATION
  91. bool
  92. select ARCH_SUSPEND_POSSIBLE
  93. config SYS_SUPPORTS_HUGETLBFS
  94. bool
  95. config SYS_SUPPORTS_SMP
  96. bool
  97. config SYS_SUPPORTS_NUMA
  98. bool
  99. config SYS_SUPPORTS_PCI
  100. bool
  101. config SYS_SUPPORTS_CMT
  102. bool
  103. config SYS_SUPPORTS_MTU2
  104. bool
  105. config SYS_SUPPORTS_TMU
  106. bool
  107. config STACKTRACE_SUPPORT
  108. def_bool y
  109. config LOCKDEP_SUPPORT
  110. def_bool y
  111. config HAVE_LATENCYTOP_SUPPORT
  112. def_bool y
  113. config ARCH_HAS_ILOG2_U32
  114. def_bool n
  115. config ARCH_HAS_ILOG2_U64
  116. def_bool n
  117. config ARCH_NO_VIRT_TO_BUS
  118. def_bool y
  119. config ARCH_HAS_DEFAULT_IDLE
  120. def_bool y
  121. config NO_IOPORT
  122. def_bool !PCI
  123. depends on !SH_CAYMAN && !SH_SH4202_MICRODEV && !SH_SHMIN && \
  124. !SH_HP6XX && !SH_SOLUTION_ENGINE
  125. config IO_TRAPPED
  126. bool
  127. config SWAP_IO_SPACE
  128. bool
  129. config DMA_COHERENT
  130. bool
  131. config DMA_NONCOHERENT
  132. def_bool !DMA_COHERENT
  133. config NEED_DMA_MAP_STATE
  134. def_bool DMA_NONCOHERENT
  135. config NEED_SG_DMA_LENGTH
  136. def_bool y
  137. source "init/Kconfig"
  138. source "kernel/Kconfig.freezer"
  139. menu "System type"
  140. #
  141. # Processor families
  142. #
  143. config CPU_SH2
  144. bool
  145. config CPU_SH2A
  146. bool
  147. select CPU_SH2
  148. select UNCACHED_MAPPING
  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. select ARCH_WANT_OPTIONAL_GPIOLIB
  213. config CPU_SUBTYPE_SH7206
  214. bool "Support SH7206 processor"
  215. select CPU_SH2A
  216. select SYS_SUPPORTS_CMT
  217. select SYS_SUPPORTS_MTU2
  218. config CPU_SUBTYPE_SH7263
  219. bool "Support SH7263 processor"
  220. select CPU_SH2A
  221. select CPU_HAS_FPU
  222. select SYS_SUPPORTS_CMT
  223. select SYS_SUPPORTS_MTU2
  224. config CPU_SUBTYPE_SH7264
  225. bool "Support SH7264 processor"
  226. select CPU_SH2A
  227. select CPU_HAS_FPU
  228. select SYS_SUPPORTS_CMT
  229. select SYS_SUPPORTS_MTU2
  230. config CPU_SUBTYPE_SH7269
  231. bool "Support SH7269 processor"
  232. select CPU_SH2A
  233. select CPU_HAS_FPU
  234. select SYS_SUPPORTS_CMT
  235. select SYS_SUPPORTS_MTU2
  236. config CPU_SUBTYPE_MXG
  237. bool "Support MX-G processor"
  238. select CPU_SH2A
  239. select SYS_SUPPORTS_MTU2
  240. help
  241. Select MX-G if running on an R8A03022BG part.
  242. # SH-3 Processor Support
  243. config CPU_SUBTYPE_SH7705
  244. bool "Support SH7705 processor"
  245. select CPU_SH3
  246. config CPU_SUBTYPE_SH7706
  247. bool "Support SH7706 processor"
  248. select CPU_SH3
  249. help
  250. Select SH7706 if you have a 133 Mhz SH-3 HD6417706 CPU.
  251. config CPU_SUBTYPE_SH7707
  252. bool "Support SH7707 processor"
  253. select CPU_SH3
  254. help
  255. Select SH7707 if you have a 60 Mhz SH-3 HD6417707 CPU.
  256. config CPU_SUBTYPE_SH7708
  257. bool "Support SH7708 processor"
  258. select CPU_SH3
  259. help
  260. Select SH7708 if you have a 60 Mhz SH-3 HD6417708S or
  261. if you have a 100 Mhz SH-3 HD6417708R CPU.
  262. config CPU_SUBTYPE_SH7709
  263. bool "Support SH7709 processor"
  264. select CPU_SH3
  265. help
  266. Select SH7709 if you have a 80 Mhz SH-3 HD6417709 CPU.
  267. config CPU_SUBTYPE_SH7710
  268. bool "Support SH7710 processor"
  269. select CPU_SH3
  270. select CPU_HAS_DSP
  271. help
  272. Select SH7710 if you have a SH3-DSP SH7710 CPU.
  273. config CPU_SUBTYPE_SH7712
  274. bool "Support SH7712 processor"
  275. select CPU_SH3
  276. select CPU_HAS_DSP
  277. help
  278. Select SH7712 if you have a SH3-DSP SH7712 CPU.
  279. config CPU_SUBTYPE_SH7720
  280. bool "Support SH7720 processor"
  281. select CPU_SH3
  282. select CPU_HAS_DSP
  283. select SYS_SUPPORTS_CMT
  284. select ARCH_WANT_OPTIONAL_GPIOLIB
  285. select USB_ARCH_HAS_OHCI
  286. select USB_OHCI_SH if USB_OHCI_HCD
  287. help
  288. Select SH7720 if you have a SH3-DSP SH7720 CPU.
  289. config CPU_SUBTYPE_SH7721
  290. bool "Support SH7721 processor"
  291. select CPU_SH3
  292. select CPU_HAS_DSP
  293. select SYS_SUPPORTS_CMT
  294. select USB_ARCH_HAS_OHCI
  295. select USB_OHCI_SH if USB_OHCI_HCD
  296. help
  297. Select SH7721 if you have a SH3-DSP SH7721 CPU.
  298. # SH-4 Processor Support
  299. config CPU_SUBTYPE_SH7750
  300. bool "Support SH7750 processor"
  301. select CPU_SH4
  302. help
  303. Select SH7750 if you have a 200 Mhz SH-4 HD6417750 CPU.
  304. config CPU_SUBTYPE_SH7091
  305. bool "Support SH7091 processor"
  306. select CPU_SH4
  307. help
  308. Select SH7091 if you have an SH-4 based Sega device (such as
  309. the Dreamcast, Naomi, and Naomi 2).
  310. config CPU_SUBTYPE_SH7750R
  311. bool "Support SH7750R processor"
  312. select CPU_SH4
  313. config CPU_SUBTYPE_SH7750S
  314. bool "Support SH7750S processor"
  315. select CPU_SH4
  316. config CPU_SUBTYPE_SH7751
  317. bool "Support SH7751 processor"
  318. select CPU_SH4
  319. help
  320. Select SH7751 if you have a 166 Mhz SH-4 HD6417751 CPU,
  321. or if you have a HD6417751R CPU.
  322. config CPU_SUBTYPE_SH7751R
  323. bool "Support SH7751R processor"
  324. select CPU_SH4
  325. config CPU_SUBTYPE_SH7760
  326. bool "Support SH7760 processor"
  327. select CPU_SH4
  328. config CPU_SUBTYPE_SH4_202
  329. bool "Support SH4-202 processor"
  330. select CPU_SH4
  331. # SH-4A Processor Support
  332. config CPU_SUBTYPE_SH7723
  333. bool "Support SH7723 processor"
  334. select CPU_SH4A
  335. select CPU_SHX2
  336. select ARCH_SHMOBILE
  337. select ARCH_SPARSEMEM_ENABLE
  338. select SYS_SUPPORTS_CMT
  339. select ARCH_WANT_OPTIONAL_GPIOLIB
  340. help
  341. Select SH7723 if you have an SH-MobileR2 CPU.
  342. config CPU_SUBTYPE_SH7724
  343. bool "Support SH7724 processor"
  344. select CPU_SH4A
  345. select CPU_SHX2
  346. select ARCH_SHMOBILE
  347. select ARCH_SPARSEMEM_ENABLE
  348. select SYS_SUPPORTS_CMT
  349. select ARCH_WANT_OPTIONAL_GPIOLIB
  350. help
  351. Select SH7724 if you have an SH-MobileR2R CPU.
  352. config CPU_SUBTYPE_SH7734
  353. bool "Support SH7734 processor"
  354. select CPU_SH4A
  355. select CPU_SHX2
  356. select ARCH_WANT_OPTIONAL_GPIOLIB
  357. select USB_ARCH_HAS_OHCI
  358. select USB_ARCH_HAS_EHCI
  359. help
  360. Select SH7734 if you have a SH4A SH7734 CPU.
  361. config CPU_SUBTYPE_SH7757
  362. bool "Support SH7757 processor"
  363. select CPU_SH4A
  364. select CPU_SHX2
  365. select ARCH_WANT_OPTIONAL_GPIOLIB
  366. select USB_ARCH_HAS_OHCI
  367. select USB_ARCH_HAS_EHCI
  368. help
  369. Select SH7757 if you have a SH4A SH7757 CPU.
  370. config CPU_SUBTYPE_SH7763
  371. bool "Support SH7763 processor"
  372. select CPU_SH4A
  373. select USB_ARCH_HAS_OHCI
  374. select USB_OHCI_SH if USB_OHCI_HCD
  375. help
  376. Select SH7763 if you have a SH4A SH7763(R5S77631) CPU.
  377. config CPU_SUBTYPE_SH7770
  378. bool "Support SH7770 processor"
  379. select CPU_SH4A
  380. config CPU_SUBTYPE_SH7780
  381. bool "Support SH7780 processor"
  382. select CPU_SH4A
  383. config CPU_SUBTYPE_SH7785
  384. bool "Support SH7785 processor"
  385. select CPU_SH4A
  386. select CPU_SHX2
  387. select ARCH_SPARSEMEM_ENABLE
  388. select SYS_SUPPORTS_NUMA
  389. select ARCH_WANT_OPTIONAL_GPIOLIB
  390. config CPU_SUBTYPE_SH7786
  391. bool "Support SH7786 processor"
  392. select CPU_SH4A
  393. select CPU_SHX3
  394. select CPU_HAS_PTEAEX
  395. select GENERIC_CLOCKEVENTS_BROADCAST if SMP
  396. select ARCH_WANT_OPTIONAL_GPIOLIB
  397. select USB_ARCH_HAS_OHCI
  398. select USB_OHCI_SH if USB_OHCI_HCD
  399. select USB_ARCH_HAS_EHCI
  400. select USB_EHCI_SH if USB_EHCI_HCD
  401. config CPU_SUBTYPE_SHX3
  402. bool "Support SH-X3 processor"
  403. select CPU_SH4A
  404. select CPU_SHX3
  405. select GENERIC_CLOCKEVENTS_BROADCAST if SMP
  406. select ARCH_REQUIRE_GPIOLIB
  407. # SH4AL-DSP Processor Support
  408. config CPU_SUBTYPE_SH7343
  409. bool "Support SH7343 processor"
  410. select CPU_SH4AL_DSP
  411. select ARCH_SHMOBILE
  412. select SYS_SUPPORTS_CMT
  413. config CPU_SUBTYPE_SH7722
  414. bool "Support SH7722 processor"
  415. select CPU_SH4AL_DSP
  416. select CPU_SHX2
  417. select ARCH_SHMOBILE
  418. select ARCH_SPARSEMEM_ENABLE
  419. select SYS_SUPPORTS_NUMA
  420. select SYS_SUPPORTS_CMT
  421. select ARCH_WANT_OPTIONAL_GPIOLIB
  422. config CPU_SUBTYPE_SH7366
  423. bool "Support SH7366 processor"
  424. select CPU_SH4AL_DSP
  425. select CPU_SHX2
  426. select ARCH_SHMOBILE
  427. select ARCH_SPARSEMEM_ENABLE
  428. select SYS_SUPPORTS_NUMA
  429. select SYS_SUPPORTS_CMT
  430. endchoice
  431. endif
  432. if SUPERH64
  433. choice
  434. prompt "Processor sub-type selection"
  435. # SH-5 Processor Support
  436. config CPU_SUBTYPE_SH5_101
  437. bool "Support SH5-101 processor"
  438. select CPU_SH5
  439. config CPU_SUBTYPE_SH5_103
  440. bool "Support SH5-103 processor"
  441. select CPU_SH5
  442. endchoice
  443. endif
  444. source "arch/sh/mm/Kconfig"
  445. source "arch/sh/Kconfig.cpu"
  446. source "arch/sh/boards/Kconfig"
  447. menu "Timer and clock configuration"
  448. config SH_TIMER_TMU
  449. bool "TMU timer driver"
  450. depends on SYS_SUPPORTS_TMU
  451. default y
  452. help
  453. This enables the build of the TMU timer driver.
  454. config SH_TIMER_CMT
  455. bool "CMT timer driver"
  456. depends on SYS_SUPPORTS_CMT
  457. default y
  458. help
  459. This enables build of the CMT timer driver.
  460. config SH_TIMER_MTU2
  461. bool "MTU2 timer driver"
  462. depends on SYS_SUPPORTS_MTU2
  463. default y
  464. help
  465. This enables build of the MTU2 timer driver.
  466. config SH_PCLK_FREQ
  467. int "Peripheral clock frequency (in Hz)"
  468. depends on SH_CLK_CPG_LEGACY
  469. default "31250000" if CPU_SUBTYPE_SH7619
  470. default "33333333" if CPU_SUBTYPE_SH7770 || \
  471. CPU_SUBTYPE_SH7760 || \
  472. CPU_SUBTYPE_SH7705 || \
  473. CPU_SUBTYPE_SH7203 || \
  474. CPU_SUBTYPE_SH7206 || \
  475. CPU_SUBTYPE_SH7263 || \
  476. CPU_SUBTYPE_MXG
  477. default "60000000" if CPU_SUBTYPE_SH7751 || CPU_SUBTYPE_SH7751R
  478. default "66000000" if CPU_SUBTYPE_SH4_202
  479. default "50000000"
  480. help
  481. This option is used to specify the peripheral clock frequency.
  482. This is necessary for determining the reference clock value on
  483. platforms lacking an RTC.
  484. config SH_CLK_CPG
  485. def_bool y
  486. config SH_CLK_CPG_LEGACY
  487. depends on SH_CLK_CPG
  488. def_bool y if !CPU_SUBTYPE_SH7785 && !ARCH_SHMOBILE && \
  489. !CPU_SHX3 && !CPU_SUBTYPE_SH7757 && \
  490. !CPU_SUBTYPE_SH7734 && !CPU_SUBTYPE_SH7264 && \
  491. !CPU_SUBTYPE_SH7269
  492. endmenu
  493. menu "CPU Frequency scaling"
  494. source "drivers/cpufreq/Kconfig"
  495. config SH_CPU_FREQ
  496. tristate "SuperH CPU Frequency driver"
  497. depends on CPU_FREQ
  498. select CPU_FREQ_TABLE
  499. help
  500. This adds the cpufreq driver for SuperH. Any CPU that supports
  501. clock rate rounding through the clock framework can use this
  502. driver. While it will make the kernel slightly larger, this is
  503. harmless for CPUs that don't support rate rounding. The driver
  504. will also generate a notice in the boot log before disabling
  505. itself if the CPU in question is not capable of rate rounding.
  506. For details, take a look at <file:Documentation/cpu-freq>.
  507. If unsure, say N.
  508. endmenu
  509. source "arch/sh/drivers/Kconfig"
  510. endmenu
  511. menu "Kernel features"
  512. source kernel/Kconfig.hz
  513. config KEXEC
  514. bool "kexec system call (EXPERIMENTAL)"
  515. depends on SUPERH32 && EXPERIMENTAL && MMU
  516. help
  517. kexec is a system call that implements the ability to shutdown your
  518. current kernel, and to start another kernel. It is like a reboot
  519. but it is independent of the system firmware. And like a reboot
  520. you can start any kernel with it, not just Linux.
  521. The name comes from the similarity to the exec system call.
  522. It is an ongoing process to be certain the hardware in a machine
  523. is properly shutdown, so do not be surprised if this code does not
  524. initially work for you. It may help to enable device hotplugging
  525. support. As of this writing the exact hardware interface is
  526. strongly in flux, so no good recommendation can be made.
  527. config CRASH_DUMP
  528. bool "kernel crash dumps (EXPERIMENTAL)"
  529. depends on SUPERH32 && EXPERIMENTAL && BROKEN_ON_SMP
  530. help
  531. Generate crash dump after being started by kexec.
  532. This should be normally only set in special crash dump kernels
  533. which are loaded in the main kernel with kexec-tools into
  534. a specially reserved region and then later executed after
  535. a crash by kdump/kexec. The crash dump kernel must be compiled
  536. to a memory address not used by the main kernel using
  537. PHYSICAL_START.
  538. For more details see Documentation/kdump/kdump.txt
  539. config KEXEC_JUMP
  540. bool "kexec jump (EXPERIMENTAL)"
  541. depends on SUPERH32 && KEXEC && HIBERNATION && EXPERIMENTAL
  542. help
  543. Jump between original kernel and kexeced kernel and invoke
  544. code via KEXEC
  545. config PHYSICAL_START
  546. hex "Physical address where the kernel is loaded" if (EXPERT || CRASH_DUMP)
  547. default MEMORY_START
  548. ---help---
  549. This gives the physical address where the kernel is loaded
  550. and is ordinarily the same as MEMORY_START.
  551. Different values are primarily used in the case of kexec on panic
  552. where the fail safe kernel needs to run at a different address
  553. than the panic-ed kernel.
  554. config SECCOMP
  555. bool "Enable seccomp to safely compute untrusted bytecode"
  556. depends on PROC_FS
  557. help
  558. This kernel feature is useful for number crunching applications
  559. that may need to compute untrusted bytecode during their
  560. execution. By using pipes or other transports made available to
  561. the process as file descriptors supporting the read/write
  562. syscalls, it's possible to isolate those applications in
  563. their own address space using seccomp. Once seccomp is
  564. enabled via prctl, it cannot be disabled and the task is only
  565. allowed to execute a few safe syscalls defined by each seccomp
  566. mode.
  567. If unsure, say N.
  568. config CC_STACKPROTECTOR
  569. bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
  570. depends on SUPERH32 && EXPERIMENTAL
  571. help
  572. This option turns on the -fstack-protector GCC feature. This
  573. feature puts, at the beginning of functions, a canary value on
  574. the stack just before the return address, and validates
  575. the value just before actually returning. Stack based buffer
  576. overflows (that need to overwrite this return address) now also
  577. overwrite the canary, which gets detected and the attack is then
  578. neutralized via a kernel panic.
  579. This feature requires gcc version 4.2 or above.
  580. config SMP
  581. bool "Symmetric multi-processing support"
  582. depends on SYS_SUPPORTS_SMP
  583. select USE_GENERIC_SMP_HELPERS
  584. ---help---
  585. This enables support for systems with more than one CPU. If you have
  586. a system with only one CPU, like most personal computers, say N. If
  587. you have a system with more than one CPU, say Y.
  588. If you say N here, the kernel will run on single and multiprocessor
  589. machines, but will use only one CPU of a multiprocessor machine. If
  590. you say Y here, the kernel will run on many, but not all,
  591. singleprocessor machines. On a singleprocessor machine, the kernel
  592. will run faster if you say N here.
  593. People using multiprocessor machines who say Y here should also say
  594. Y to "Enhanced Real Time Clock Support", below.
  595. See also <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO
  596. available at <http://www.tldp.org/docs.html#howto>.
  597. If you don't know what to do here, say N.
  598. config NR_CPUS
  599. int "Maximum number of CPUs (2-32)"
  600. range 2 32
  601. depends on SMP
  602. default "4" if CPU_SUBTYPE_SHX3
  603. default "2"
  604. help
  605. This allows you to specify the maximum number of CPUs which this
  606. kernel will support. The maximum supported value is 32 and the
  607. minimum value which makes sense is 2.
  608. This is purely to save memory - each supported CPU adds
  609. approximately eight kilobytes to the kernel image.
  610. config HOTPLUG_CPU
  611. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  612. depends on SMP && HOTPLUG && EXPERIMENTAL
  613. help
  614. Say Y here to experiment with turning CPUs off and on. CPUs
  615. can be controlled through /sys/devices/system/cpu.
  616. source "kernel/Kconfig.preempt"
  617. config GUSA
  618. def_bool y
  619. depends on !SMP && SUPERH32
  620. help
  621. This enables support for gUSA (general UserSpace Atomicity).
  622. This is the default implementation for both UP and non-ll/sc
  623. CPUs, and is used by the libc, amongst others.
  624. For additional information, design information can be found
  625. in <http://lc.linux.or.jp/lc2002/papers/niibe0919p.pdf>.
  626. This should only be disabled for special cases where alternate
  627. atomicity implementations exist.
  628. config GUSA_RB
  629. bool "Implement atomic operations by roll-back (gRB) (EXPERIMENTAL)"
  630. depends on GUSA && CPU_SH3 || (CPU_SH4 && !CPU_SH4A)
  631. help
  632. Enabling this option will allow the kernel to implement some
  633. atomic operations using a software implementation of load-locked/
  634. store-conditional (LLSC). On machines which do not have hardware
  635. LLSC, this should be more efficient than the other alternative of
  636. disabling interrupts around the atomic sequence.
  637. config HW_PERF_EVENTS
  638. bool "Enable hardware performance counter support for perf events"
  639. depends on PERF_EVENTS && CPU_HAS_PMU
  640. default y
  641. help
  642. Enable hardware performance counter support for perf events. If
  643. disabled, perf events will use software events only.
  644. source "drivers/sh/Kconfig"
  645. endmenu
  646. menu "Boot options"
  647. config ZERO_PAGE_OFFSET
  648. hex
  649. default "0x00010000" if PAGE_SIZE_64KB || SH_RTS7751R2D || \
  650. SH_7751_SOLUTION_ENGINE
  651. default "0x00004000" if PAGE_SIZE_16KB || SH_SH03
  652. default "0x00002000" if PAGE_SIZE_8KB
  653. default "0x00001000"
  654. help
  655. This sets the default offset of zero page.
  656. config BOOT_LINK_OFFSET
  657. hex
  658. default "0x00210000" if SH_SHMIN
  659. default "0x00400000" if SH_CAYMAN
  660. default "0x00810000" if SH_7780_SOLUTION_ENGINE
  661. default "0x009e0000" if SH_TITAN
  662. default "0x01800000" if SH_SDK7780
  663. default "0x02000000" if SH_EDOSK7760
  664. default "0x00800000"
  665. help
  666. This option allows you to set the link address offset of the zImage.
  667. This can be useful if you are on a board which has a small amount of
  668. memory.
  669. config ENTRY_OFFSET
  670. hex
  671. default "0x00001000" if PAGE_SIZE_4KB
  672. default "0x00002000" if PAGE_SIZE_8KB
  673. default "0x00004000" if PAGE_SIZE_16KB
  674. default "0x00010000" if PAGE_SIZE_64KB
  675. default "0x00000000"
  676. config ROMIMAGE_MMCIF
  677. bool "Include MMCIF loader in romImage (EXPERIMENTAL)"
  678. depends on CPU_SUBTYPE_SH7724 && EXPERIMENTAL
  679. help
  680. Say Y here to include experimental MMCIF loading code in
  681. romImage. With this enabled it is possible to write the romImage
  682. kernel image to an MMC card and boot the kernel straight from
  683. the reset vector. At reset the processor Mask ROM will load the
  684. first part of the romImage which in turn loads the rest the kernel
  685. image to RAM using the MMCIF hardware block.
  686. choice
  687. prompt "Kernel command line"
  688. optional
  689. default CMDLINE_OVERWRITE
  690. help
  691. Setting this option allows the kernel command line arguments
  692. to be set.
  693. config CMDLINE_OVERWRITE
  694. bool "Overwrite bootloader kernel arguments"
  695. help
  696. Given string will overwrite any arguments passed in by
  697. a bootloader.
  698. config CMDLINE_EXTEND
  699. bool "Extend bootloader kernel arguments"
  700. help
  701. Given string will be concatenated with arguments passed in
  702. by a bootloader.
  703. endchoice
  704. config CMDLINE
  705. string "Kernel command line arguments string"
  706. depends on CMDLINE_OVERWRITE || CMDLINE_EXTEND
  707. default "console=ttySC1,115200"
  708. endmenu
  709. menu "Bus options"
  710. config SUPERHYWAY
  711. tristate "SuperHyway Bus support"
  712. depends on CPU_SUBTYPE_SH4_202
  713. config MAPLE
  714. bool "Maple Bus support"
  715. depends on SH_DREAMCAST
  716. help
  717. The Maple Bus is SEGA's serial communication bus for peripherals
  718. on the Dreamcast. Without this bus support you won't be able to
  719. get your Dreamcast keyboard etc to work, so most users
  720. probably want to say 'Y' here, unless you are only using the
  721. Dreamcast with a serial line terminal or a remote network
  722. connection.
  723. config PCI
  724. bool "PCI support"
  725. depends on SYS_SUPPORTS_PCI
  726. select PCI_DOMAINS
  727. select GENERIC_PCI_IOMAP
  728. select NO_GENERIC_PCI_IOPORT_MAP
  729. help
  730. Find out whether you have a PCI motherboard. PCI is the name of a
  731. bus system, i.e. the way the CPU talks to the other stuff inside
  732. your box. If you have PCI, say Y, otherwise N.
  733. config PCI_DOMAINS
  734. bool
  735. source "drivers/pci/pcie/Kconfig"
  736. source "drivers/pci/Kconfig"
  737. source "drivers/pcmcia/Kconfig"
  738. source "drivers/pci/hotplug/Kconfig"
  739. endmenu
  740. menu "Executable file formats"
  741. source "fs/Kconfig.binfmt"
  742. endmenu
  743. menu "Power management options (EXPERIMENTAL)"
  744. depends on EXPERIMENTAL
  745. source "kernel/power/Kconfig"
  746. source "drivers/cpuidle/Kconfig"
  747. endmenu
  748. source "net/Kconfig"
  749. source "drivers/Kconfig"
  750. source "fs/Kconfig"
  751. source "arch/sh/Kconfig.debug"
  752. source "security/Kconfig"
  753. source "crypto/Kconfig"
  754. source "lib/Kconfig"