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_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. config SUPERH32
  51. def_bool ARCH = "sh"
  52. select HAVE_KPROBES
  53. select HAVE_KRETPROBES
  54. select HAVE_IOREMAP_PROT if MMU && !X2TLB
  55. select HAVE_FUNCTION_TRACER
  56. select HAVE_FTRACE_MCOUNT_RECORD
  57. select HAVE_DYNAMIC_FTRACE
  58. select HAVE_FUNCTION_TRACE_MCOUNT_TEST
  59. select HAVE_FTRACE_NMI_ENTER if DYNAMIC_FTRACE
  60. select ARCH_WANT_IPC_PARSE_VERSION
  61. select HAVE_FUNCTION_GRAPH_TRACER
  62. select HAVE_ARCH_KGDB
  63. select HAVE_HW_BREAKPOINT
  64. select HAVE_MIXED_BREAKPOINTS_REGS
  65. select PERF_EVENTS
  66. select ARCH_HIBERNATION_POSSIBLE if MMU
  67. select SPARSE_IRQ
  68. config SUPERH64
  69. def_bool ARCH = "sh64"
  70. select KALLSYMS
  71. config ARCH_DEFCONFIG
  72. string
  73. default "arch/sh/configs/shx3_defconfig" if SUPERH32
  74. default "arch/sh/configs/cayman_defconfig" if SUPERH64
  75. config RWSEM_GENERIC_SPINLOCK
  76. def_bool y
  77. config RWSEM_XCHGADD_ALGORITHM
  78. bool
  79. config GENERIC_BUG
  80. def_bool y
  81. depends on BUG && SUPERH32
  82. config GENERIC_CSUM
  83. def_bool y
  84. depends on SUPERH64
  85. config GENERIC_HWEIGHT
  86. def_bool y
  87. config GENERIC_GPIO
  88. def_bool n
  89. config GENERIC_CALIBRATE_DELAY
  90. bool
  91. config GENERIC_LOCKBREAK
  92. def_bool y
  93. depends on SMP && PREEMPT
  94. config ARCH_SUSPEND_POSSIBLE
  95. def_bool n
  96. config ARCH_HIBERNATION_POSSIBLE
  97. def_bool n
  98. config SYS_SUPPORTS_APM_EMULATION
  99. bool
  100. select ARCH_SUSPEND_POSSIBLE
  101. config SYS_SUPPORTS_HUGETLBFS
  102. bool
  103. config SYS_SUPPORTS_SMP
  104. bool
  105. config SYS_SUPPORTS_NUMA
  106. bool
  107. config SYS_SUPPORTS_PCI
  108. bool
  109. config SYS_SUPPORTS_CMT
  110. bool
  111. config SYS_SUPPORTS_MTU2
  112. bool
  113. config SYS_SUPPORTS_TMU
  114. bool
  115. config STACKTRACE_SUPPORT
  116. def_bool y
  117. config LOCKDEP_SUPPORT
  118. def_bool y
  119. config HAVE_LATENCYTOP_SUPPORT
  120. def_bool y
  121. config ARCH_HAS_ILOG2_U32
  122. def_bool n
  123. config ARCH_HAS_ILOG2_U64
  124. def_bool n
  125. config NO_IOPORT
  126. def_bool !PCI
  127. depends on !SH_CAYMAN && !SH_SH4202_MICRODEV && !SH_SHMIN && \
  128. !SH_HP6XX && !SH_SOLUTION_ENGINE
  129. config IO_TRAPPED
  130. bool
  131. config SWAP_IO_SPACE
  132. bool
  133. config DMA_COHERENT
  134. bool
  135. config DMA_NONCOHERENT
  136. def_bool !DMA_COHERENT
  137. config NEED_DMA_MAP_STATE
  138. def_bool DMA_NONCOHERENT
  139. config NEED_SG_DMA_LENGTH
  140. def_bool y
  141. source "init/Kconfig"
  142. source "kernel/Kconfig.freezer"
  143. menu "System type"
  144. #
  145. # Processor families
  146. #
  147. config CPU_SH2
  148. bool
  149. config CPU_SH2A
  150. bool
  151. select CPU_SH2
  152. select UNCACHED_MAPPING
  153. config CPU_SH3
  154. bool
  155. select CPU_HAS_INTEVT
  156. select CPU_HAS_SR_RB
  157. select SYS_SUPPORTS_TMU
  158. config CPU_SH4
  159. bool
  160. select CPU_HAS_INTEVT
  161. select CPU_HAS_SR_RB
  162. select CPU_HAS_FPU if !CPU_SH4AL_DSP
  163. select SYS_SUPPORTS_TMU
  164. select SYS_SUPPORTS_HUGETLBFS if MMU
  165. config CPU_SH4A
  166. bool
  167. select CPU_SH4
  168. config CPU_SH4AL_DSP
  169. bool
  170. select CPU_SH4A
  171. select CPU_HAS_DSP
  172. config CPU_SH5
  173. bool
  174. select CPU_HAS_FPU
  175. select SYS_SUPPORTS_TMU
  176. select SYS_SUPPORTS_HUGETLBFS if MMU
  177. config CPU_SHX2
  178. bool
  179. config CPU_SHX3
  180. bool
  181. select DMA_COHERENT
  182. select SYS_SUPPORTS_SMP
  183. select SYS_SUPPORTS_NUMA
  184. config ARCH_SHMOBILE
  185. bool
  186. select ARCH_SUSPEND_POSSIBLE
  187. select PM
  188. select PM_RUNTIME
  189. config CPU_HAS_PMU
  190. depends on CPU_SH4 || CPU_SH4A
  191. default y
  192. bool
  193. if SUPERH32
  194. choice
  195. prompt "Processor sub-type selection"
  196. #
  197. # Processor subtypes
  198. #
  199. # SH-2 Processor Support
  200. config CPU_SUBTYPE_SH7619
  201. bool "Support SH7619 processor"
  202. select CPU_SH2
  203. select SYS_SUPPORTS_CMT
  204. # SH-2A Processor Support
  205. config CPU_SUBTYPE_SH7201
  206. bool "Support SH7201 processor"
  207. select CPU_SH2A
  208. select CPU_HAS_FPU
  209. select SYS_SUPPORTS_MTU2
  210. config CPU_SUBTYPE_SH7203
  211. bool "Support SH7203 processor"
  212. select CPU_SH2A
  213. select CPU_HAS_FPU
  214. select SYS_SUPPORTS_CMT
  215. select SYS_SUPPORTS_MTU2
  216. select ARCH_WANT_OPTIONAL_GPIOLIB
  217. select PINCTRL
  218. config CPU_SUBTYPE_SH7206
  219. bool "Support SH7206 processor"
  220. select CPU_SH2A
  221. select SYS_SUPPORTS_CMT
  222. select SYS_SUPPORTS_MTU2
  223. config CPU_SUBTYPE_SH7263
  224. bool "Support SH7263 processor"
  225. select CPU_SH2A
  226. select CPU_HAS_FPU
  227. select SYS_SUPPORTS_CMT
  228. select SYS_SUPPORTS_MTU2
  229. config CPU_SUBTYPE_SH7264
  230. bool "Support SH7264 processor"
  231. select CPU_SH2A
  232. select CPU_HAS_FPU
  233. select SYS_SUPPORTS_CMT
  234. select SYS_SUPPORTS_MTU2
  235. select PINCTRL
  236. config CPU_SUBTYPE_SH7269
  237. bool "Support SH7269 processor"
  238. select CPU_SH2A
  239. select CPU_HAS_FPU
  240. select SYS_SUPPORTS_CMT
  241. select SYS_SUPPORTS_MTU2
  242. select PINCTRL
  243. config CPU_SUBTYPE_MXG
  244. bool "Support MX-G processor"
  245. select CPU_SH2A
  246. select SYS_SUPPORTS_MTU2
  247. help
  248. Select MX-G if running on an R8A03022BG part.
  249. # SH-3 Processor Support
  250. config CPU_SUBTYPE_SH7705
  251. bool "Support SH7705 processor"
  252. select CPU_SH3
  253. config CPU_SUBTYPE_SH7706
  254. bool "Support SH7706 processor"
  255. select CPU_SH3
  256. help
  257. Select SH7706 if you have a 133 Mhz SH-3 HD6417706 CPU.
  258. config CPU_SUBTYPE_SH7707
  259. bool "Support SH7707 processor"
  260. select CPU_SH3
  261. help
  262. Select SH7707 if you have a 60 Mhz SH-3 HD6417707 CPU.
  263. config CPU_SUBTYPE_SH7708
  264. bool "Support SH7708 processor"
  265. select CPU_SH3
  266. help
  267. Select SH7708 if you have a 60 Mhz SH-3 HD6417708S or
  268. if you have a 100 Mhz SH-3 HD6417708R CPU.
  269. config CPU_SUBTYPE_SH7709
  270. bool "Support SH7709 processor"
  271. select CPU_SH3
  272. help
  273. Select SH7709 if you have a 80 Mhz SH-3 HD6417709 CPU.
  274. config CPU_SUBTYPE_SH7710
  275. bool "Support SH7710 processor"
  276. select CPU_SH3
  277. select CPU_HAS_DSP
  278. help
  279. Select SH7710 if you have a SH3-DSP SH7710 CPU.
  280. config CPU_SUBTYPE_SH7712
  281. bool "Support SH7712 processor"
  282. select CPU_SH3
  283. select CPU_HAS_DSP
  284. help
  285. Select SH7712 if you have a SH3-DSP SH7712 CPU.
  286. config CPU_SUBTYPE_SH7720
  287. bool "Support SH7720 processor"
  288. select CPU_SH3
  289. select CPU_HAS_DSP
  290. select SYS_SUPPORTS_CMT
  291. select ARCH_WANT_OPTIONAL_GPIOLIB
  292. select USB_ARCH_HAS_OHCI
  293. select USB_OHCI_SH if USB_OHCI_HCD
  294. select PINCTRL
  295. help
  296. Select SH7720 if you have a SH3-DSP SH7720 CPU.
  297. config CPU_SUBTYPE_SH7721
  298. bool "Support SH7721 processor"
  299. select CPU_SH3
  300. select CPU_HAS_DSP
  301. select SYS_SUPPORTS_CMT
  302. select USB_ARCH_HAS_OHCI
  303. select USB_OHCI_SH if USB_OHCI_HCD
  304. help
  305. Select SH7721 if you have a SH3-DSP SH7721 CPU.
  306. # SH-4 Processor Support
  307. config CPU_SUBTYPE_SH7750
  308. bool "Support SH7750 processor"
  309. select CPU_SH4
  310. help
  311. Select SH7750 if you have a 200 Mhz SH-4 HD6417750 CPU.
  312. config CPU_SUBTYPE_SH7091
  313. bool "Support SH7091 processor"
  314. select CPU_SH4
  315. help
  316. Select SH7091 if you have an SH-4 based Sega device (such as
  317. the Dreamcast, Naomi, and Naomi 2).
  318. config CPU_SUBTYPE_SH7750R
  319. bool "Support SH7750R processor"
  320. select CPU_SH4
  321. config CPU_SUBTYPE_SH7750S
  322. bool "Support SH7750S processor"
  323. select CPU_SH4
  324. config CPU_SUBTYPE_SH7751
  325. bool "Support SH7751 processor"
  326. select CPU_SH4
  327. help
  328. Select SH7751 if you have a 166 Mhz SH-4 HD6417751 CPU,
  329. or if you have a HD6417751R CPU.
  330. config CPU_SUBTYPE_SH7751R
  331. bool "Support SH7751R processor"
  332. select CPU_SH4
  333. config CPU_SUBTYPE_SH7760
  334. bool "Support SH7760 processor"
  335. select CPU_SH4
  336. config CPU_SUBTYPE_SH4_202
  337. bool "Support SH4-202 processor"
  338. select CPU_SH4
  339. # SH-4A Processor Support
  340. config CPU_SUBTYPE_SH7723
  341. bool "Support SH7723 processor"
  342. select CPU_SH4A
  343. select CPU_SHX2
  344. select ARCH_SHMOBILE
  345. select ARCH_SPARSEMEM_ENABLE
  346. select SYS_SUPPORTS_CMT
  347. select ARCH_WANT_OPTIONAL_GPIOLIB
  348. select PINCTRL
  349. help
  350. Select SH7723 if you have an SH-MobileR2 CPU.
  351. config CPU_SUBTYPE_SH7724
  352. bool "Support SH7724 processor"
  353. select CPU_SH4A
  354. select CPU_SHX2
  355. select ARCH_SHMOBILE
  356. select ARCH_SPARSEMEM_ENABLE
  357. select SYS_SUPPORTS_CMT
  358. select ARCH_WANT_OPTIONAL_GPIOLIB
  359. select PINCTRL
  360. help
  361. Select SH7724 if you have an SH-MobileR2R CPU.
  362. config CPU_SUBTYPE_SH7734
  363. bool "Support SH7734 processor"
  364. select CPU_SH4A
  365. select CPU_SHX2
  366. select ARCH_WANT_OPTIONAL_GPIOLIB
  367. select USB_ARCH_HAS_OHCI
  368. select USB_ARCH_HAS_EHCI
  369. select PINCTRL
  370. help
  371. Select SH7734 if you have a SH4A SH7734 CPU.
  372. config CPU_SUBTYPE_SH7757
  373. bool "Support SH7757 processor"
  374. select CPU_SH4A
  375. select CPU_SHX2
  376. select ARCH_WANT_OPTIONAL_GPIOLIB
  377. select USB_ARCH_HAS_OHCI
  378. select USB_ARCH_HAS_EHCI
  379. select PINCTRL
  380. help
  381. Select SH7757 if you have a SH4A SH7757 CPU.
  382. config CPU_SUBTYPE_SH7763
  383. bool "Support SH7763 processor"
  384. select CPU_SH4A
  385. select USB_ARCH_HAS_OHCI
  386. select USB_OHCI_SH if USB_OHCI_HCD
  387. help
  388. Select SH7763 if you have a SH4A SH7763(R5S77631) CPU.
  389. config CPU_SUBTYPE_SH7770
  390. bool "Support SH7770 processor"
  391. select CPU_SH4A
  392. config CPU_SUBTYPE_SH7780
  393. bool "Support SH7780 processor"
  394. select CPU_SH4A
  395. config CPU_SUBTYPE_SH7785
  396. bool "Support SH7785 processor"
  397. select CPU_SH4A
  398. select CPU_SHX2
  399. select ARCH_SPARSEMEM_ENABLE
  400. select SYS_SUPPORTS_NUMA
  401. select ARCH_WANT_OPTIONAL_GPIOLIB
  402. select PINCTRL
  403. config CPU_SUBTYPE_SH7786
  404. bool "Support SH7786 processor"
  405. select CPU_SH4A
  406. select CPU_SHX3
  407. select CPU_HAS_PTEAEX
  408. select GENERIC_CLOCKEVENTS_BROADCAST if SMP
  409. select ARCH_WANT_OPTIONAL_GPIOLIB
  410. select USB_ARCH_HAS_OHCI
  411. select USB_OHCI_SH if USB_OHCI_HCD
  412. select USB_ARCH_HAS_EHCI
  413. select USB_EHCI_SH if USB_EHCI_HCD
  414. select PINCTRL
  415. config CPU_SUBTYPE_SHX3
  416. bool "Support SH-X3 processor"
  417. select CPU_SH4A
  418. select CPU_SHX3
  419. select GENERIC_CLOCKEVENTS_BROADCAST if SMP
  420. select ARCH_REQUIRE_GPIOLIB
  421. select PINCTRL
  422. # SH4AL-DSP Processor Support
  423. config CPU_SUBTYPE_SH7343
  424. bool "Support SH7343 processor"
  425. select CPU_SH4AL_DSP
  426. select ARCH_SHMOBILE
  427. select SYS_SUPPORTS_CMT
  428. config CPU_SUBTYPE_SH7722
  429. bool "Support SH7722 processor"
  430. select CPU_SH4AL_DSP
  431. select CPU_SHX2
  432. select ARCH_SHMOBILE
  433. select ARCH_SPARSEMEM_ENABLE
  434. select SYS_SUPPORTS_NUMA
  435. select SYS_SUPPORTS_CMT
  436. select ARCH_WANT_OPTIONAL_GPIOLIB
  437. select PINCTRL
  438. config CPU_SUBTYPE_SH7366
  439. bool "Support SH7366 processor"
  440. select CPU_SH4AL_DSP
  441. select CPU_SHX2
  442. select ARCH_SHMOBILE
  443. select ARCH_SPARSEMEM_ENABLE
  444. select SYS_SUPPORTS_NUMA
  445. select SYS_SUPPORTS_CMT
  446. endchoice
  447. endif
  448. if SUPERH64
  449. choice
  450. prompt "Processor sub-type selection"
  451. # SH-5 Processor Support
  452. config CPU_SUBTYPE_SH5_101
  453. bool "Support SH5-101 processor"
  454. select CPU_SH5
  455. config CPU_SUBTYPE_SH5_103
  456. bool "Support SH5-103 processor"
  457. select CPU_SH5
  458. endchoice
  459. endif
  460. source "arch/sh/mm/Kconfig"
  461. source "arch/sh/Kconfig.cpu"
  462. source "arch/sh/boards/Kconfig"
  463. menu "Timer and clock configuration"
  464. config SH_TIMER_TMU
  465. bool "TMU timer driver"
  466. depends on SYS_SUPPORTS_TMU
  467. default y
  468. help
  469. This enables the build of the TMU timer driver.
  470. config SH_TIMER_CMT
  471. bool "CMT timer driver"
  472. depends on SYS_SUPPORTS_CMT
  473. default y
  474. help
  475. This enables build of the CMT timer driver.
  476. config SH_TIMER_MTU2
  477. bool "MTU2 timer driver"
  478. depends on SYS_SUPPORTS_MTU2
  479. default y
  480. help
  481. This enables build of the MTU2 timer driver.
  482. config SH_PCLK_FREQ
  483. int "Peripheral clock frequency (in Hz)"
  484. depends on SH_CLK_CPG_LEGACY
  485. default "31250000" if CPU_SUBTYPE_SH7619
  486. default "33333333" if CPU_SUBTYPE_SH7770 || \
  487. CPU_SUBTYPE_SH7760 || \
  488. CPU_SUBTYPE_SH7705 || \
  489. CPU_SUBTYPE_SH7203 || \
  490. CPU_SUBTYPE_SH7206 || \
  491. CPU_SUBTYPE_SH7263 || \
  492. CPU_SUBTYPE_MXG
  493. default "60000000" if CPU_SUBTYPE_SH7751 || CPU_SUBTYPE_SH7751R
  494. default "66000000" if CPU_SUBTYPE_SH4_202
  495. default "50000000"
  496. help
  497. This option is used to specify the peripheral clock frequency.
  498. This is necessary for determining the reference clock value on
  499. platforms lacking an RTC.
  500. config SH_CLK_CPG
  501. def_bool y
  502. config SH_CLK_CPG_LEGACY
  503. depends on SH_CLK_CPG
  504. def_bool y if !CPU_SUBTYPE_SH7785 && !ARCH_SHMOBILE && \
  505. !CPU_SHX3 && !CPU_SUBTYPE_SH7757 && \
  506. !CPU_SUBTYPE_SH7734 && !CPU_SUBTYPE_SH7264 && \
  507. !CPU_SUBTYPE_SH7269
  508. endmenu
  509. menu "CPU Frequency scaling"
  510. source "drivers/cpufreq/Kconfig"
  511. config SH_CPU_FREQ
  512. tristate "SuperH CPU Frequency driver"
  513. depends on CPU_FREQ
  514. select CPU_FREQ_TABLE
  515. help
  516. This adds the cpufreq driver for SuperH. Any CPU that supports
  517. clock rate rounding through the clock framework can use this
  518. driver. While it will make the kernel slightly larger, this is
  519. harmless for CPUs that don't support rate rounding. The driver
  520. will also generate a notice in the boot log before disabling
  521. itself if the CPU in question is not capable of rate rounding.
  522. For details, take a look at <file:Documentation/cpu-freq>.
  523. If unsure, say N.
  524. endmenu
  525. source "arch/sh/drivers/Kconfig"
  526. endmenu
  527. menu "Kernel features"
  528. source kernel/Kconfig.hz
  529. config KEXEC
  530. bool "kexec system call (EXPERIMENTAL)"
  531. depends on SUPERH32 && MMU
  532. help
  533. kexec is a system call that implements the ability to shutdown your
  534. current kernel, and to start another kernel. It is like a reboot
  535. but it is independent of the system firmware. And like a reboot
  536. you can start any kernel with it, not just Linux.
  537. The name comes from the similarity to the exec system call.
  538. It is an ongoing process to be certain the hardware in a machine
  539. is properly shutdown, so do not be surprised if this code does not
  540. initially work for you. It may help to enable device hotplugging
  541. support. As of this writing the exact hardware interface is
  542. strongly in flux, so no good recommendation can be made.
  543. config CRASH_DUMP
  544. bool "kernel crash dumps (EXPERIMENTAL)"
  545. depends on SUPERH32 && BROKEN_ON_SMP
  546. help
  547. Generate crash dump after being started by kexec.
  548. This should be normally only set in special crash dump kernels
  549. which are loaded in the main kernel with kexec-tools into
  550. a specially reserved region and then later executed after
  551. a crash by kdump/kexec. The crash dump kernel must be compiled
  552. to a memory address not used by the main kernel using
  553. PHYSICAL_START.
  554. For more details see Documentation/kdump/kdump.txt
  555. config KEXEC_JUMP
  556. bool "kexec jump (EXPERIMENTAL)"
  557. depends on SUPERH32 && KEXEC && HIBERNATION
  558. help
  559. Jump between original kernel and kexeced kernel and invoke
  560. code via KEXEC
  561. config PHYSICAL_START
  562. hex "Physical address where the kernel is loaded" if (EXPERT || CRASH_DUMP)
  563. default MEMORY_START
  564. ---help---
  565. This gives the physical address where the kernel is loaded
  566. and is ordinarily the same as MEMORY_START.
  567. Different values are primarily used in the case of kexec on panic
  568. where the fail safe kernel needs to run at a different address
  569. than the panic-ed kernel.
  570. config SECCOMP
  571. bool "Enable seccomp to safely compute untrusted bytecode"
  572. depends on PROC_FS
  573. help
  574. This kernel feature is useful for number crunching applications
  575. that may need to compute untrusted bytecode during their
  576. execution. By using pipes or other transports made available to
  577. the process as file descriptors supporting the read/write
  578. syscalls, it's possible to isolate those applications in
  579. their own address space using seccomp. Once seccomp is
  580. enabled via prctl, it cannot be disabled and the task is only
  581. allowed to execute a few safe syscalls defined by each seccomp
  582. mode.
  583. If unsure, say N.
  584. config CC_STACKPROTECTOR
  585. bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
  586. depends on SUPERH32
  587. help
  588. This option turns on the -fstack-protector GCC feature. This
  589. feature puts, at the beginning of functions, a canary value on
  590. the stack just before the return address, and validates
  591. the value just before actually returning. Stack based buffer
  592. overflows (that need to overwrite this return address) now also
  593. overwrite the canary, which gets detected and the attack is then
  594. neutralized via a kernel panic.
  595. This feature requires gcc version 4.2 or above.
  596. config SMP
  597. bool "Symmetric multi-processing support"
  598. depends on SYS_SUPPORTS_SMP
  599. select USE_GENERIC_SMP_HELPERS
  600. ---help---
  601. This enables support for systems with more than one CPU. If you have
  602. a system with only one CPU, like most personal computers, say N. If
  603. you have a system with more than one CPU, say Y.
  604. If you say N here, the kernel will run on single and multiprocessor
  605. machines, but will use only one CPU of a multiprocessor machine. If
  606. you say Y here, the kernel will run on many, but not all,
  607. singleprocessor machines. On a singleprocessor machine, the kernel
  608. will run faster if you say N here.
  609. People using multiprocessor machines who say Y here should also say
  610. Y to "Enhanced Real Time Clock Support", below.
  611. See also <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO
  612. available at <http://www.tldp.org/docs.html#howto>.
  613. If you don't know what to do here, say N.
  614. config NR_CPUS
  615. int "Maximum number of CPUs (2-32)"
  616. range 2 32
  617. depends on SMP
  618. default "4" if CPU_SUBTYPE_SHX3
  619. default "2"
  620. help
  621. This allows you to specify the maximum number of CPUs which this
  622. kernel will support. The maximum supported value is 32 and the
  623. minimum value which makes sense is 2.
  624. This is purely to save memory - each supported CPU adds
  625. approximately eight kilobytes to the kernel image.
  626. config HOTPLUG_CPU
  627. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  628. depends on SMP && HOTPLUG
  629. help
  630. Say Y here to experiment with turning CPUs off and on. CPUs
  631. can be controlled through /sys/devices/system/cpu.
  632. source "kernel/Kconfig.preempt"
  633. config GUSA
  634. def_bool y
  635. depends on !SMP && SUPERH32
  636. help
  637. This enables support for gUSA (general UserSpace Atomicity).
  638. This is the default implementation for both UP and non-ll/sc
  639. CPUs, and is used by the libc, amongst others.
  640. For additional information, design information can be found
  641. in <http://lc.linux.or.jp/lc2002/papers/niibe0919p.pdf>.
  642. This should only be disabled for special cases where alternate
  643. atomicity implementations exist.
  644. config GUSA_RB
  645. bool "Implement atomic operations by roll-back (gRB) (EXPERIMENTAL)"
  646. depends on GUSA && CPU_SH3 || (CPU_SH4 && !CPU_SH4A)
  647. help
  648. Enabling this option will allow the kernel to implement some
  649. atomic operations using a software implementation of load-locked/
  650. store-conditional (LLSC). On machines which do not have hardware
  651. LLSC, this should be more efficient than the other alternative of
  652. disabling interrupts around the atomic sequence.
  653. config HW_PERF_EVENTS
  654. bool "Enable hardware performance counter support for perf events"
  655. depends on PERF_EVENTS && CPU_HAS_PMU
  656. default y
  657. help
  658. Enable hardware performance counter support for perf events. If
  659. disabled, perf events will use software events only.
  660. source "drivers/sh/Kconfig"
  661. endmenu
  662. menu "Boot options"
  663. config ZERO_PAGE_OFFSET
  664. hex
  665. default "0x00010000" if PAGE_SIZE_64KB || SH_RTS7751R2D || \
  666. SH_7751_SOLUTION_ENGINE
  667. default "0x00004000" if PAGE_SIZE_16KB || SH_SH03
  668. default "0x00002000" if PAGE_SIZE_8KB
  669. default "0x00001000"
  670. help
  671. This sets the default offset of zero page.
  672. config BOOT_LINK_OFFSET
  673. hex
  674. default "0x00210000" if SH_SHMIN
  675. default "0x00400000" if SH_CAYMAN
  676. default "0x00810000" if SH_7780_SOLUTION_ENGINE
  677. default "0x009e0000" if SH_TITAN
  678. default "0x01800000" if SH_SDK7780
  679. default "0x02000000" if SH_EDOSK7760
  680. default "0x00800000"
  681. help
  682. This option allows you to set the link address offset of the zImage.
  683. This can be useful if you are on a board which has a small amount of
  684. memory.
  685. config ENTRY_OFFSET
  686. hex
  687. default "0x00001000" if PAGE_SIZE_4KB
  688. default "0x00002000" if PAGE_SIZE_8KB
  689. default "0x00004000" if PAGE_SIZE_16KB
  690. default "0x00010000" if PAGE_SIZE_64KB
  691. default "0x00000000"
  692. config ROMIMAGE_MMCIF
  693. bool "Include MMCIF loader in romImage (EXPERIMENTAL)"
  694. depends on CPU_SUBTYPE_SH7724
  695. help
  696. Say Y here to include experimental MMCIF loading code in
  697. romImage. With this enabled it is possible to write the romImage
  698. kernel image to an MMC card and boot the kernel straight from
  699. the reset vector. At reset the processor Mask ROM will load the
  700. first part of the romImage which in turn loads the rest the kernel
  701. image to RAM using the MMCIF hardware block.
  702. choice
  703. prompt "Kernel command line"
  704. optional
  705. default CMDLINE_OVERWRITE
  706. help
  707. Setting this option allows the kernel command line arguments
  708. to be set.
  709. config CMDLINE_OVERWRITE
  710. bool "Overwrite bootloader kernel arguments"
  711. help
  712. Given string will overwrite any arguments passed in by
  713. a bootloader.
  714. config CMDLINE_EXTEND
  715. bool "Extend bootloader kernel arguments"
  716. help
  717. Given string will be concatenated with arguments passed in
  718. by a bootloader.
  719. endchoice
  720. config CMDLINE
  721. string "Kernel command line arguments string"
  722. depends on CMDLINE_OVERWRITE || CMDLINE_EXTEND
  723. default "console=ttySC1,115200"
  724. endmenu
  725. menu "Bus options"
  726. config SUPERHYWAY
  727. tristate "SuperHyway Bus support"
  728. depends on CPU_SUBTYPE_SH4_202
  729. config MAPLE
  730. bool "Maple Bus support"
  731. depends on SH_DREAMCAST
  732. help
  733. The Maple Bus is SEGA's serial communication bus for peripherals
  734. on the Dreamcast. Without this bus support you won't be able to
  735. get your Dreamcast keyboard etc to work, so most users
  736. probably want to say 'Y' here, unless you are only using the
  737. Dreamcast with a serial line terminal or a remote network
  738. connection.
  739. config PCI
  740. bool "PCI support"
  741. depends on SYS_SUPPORTS_PCI
  742. select PCI_DOMAINS
  743. select GENERIC_PCI_IOMAP
  744. select NO_GENERIC_PCI_IOPORT_MAP
  745. help
  746. Find out whether you have a PCI motherboard. PCI is the name of a
  747. bus system, i.e. the way the CPU talks to the other stuff inside
  748. your box. If you have PCI, say Y, otherwise N.
  749. config PCI_DOMAINS
  750. bool
  751. source "drivers/pci/pcie/Kconfig"
  752. source "drivers/pci/Kconfig"
  753. source "drivers/pcmcia/Kconfig"
  754. source "drivers/pci/hotplug/Kconfig"
  755. endmenu
  756. menu "Executable file formats"
  757. source "fs/Kconfig.binfmt"
  758. endmenu
  759. menu "Power management options (EXPERIMENTAL)"
  760. source "kernel/power/Kconfig"
  761. source "drivers/cpuidle/Kconfig"
  762. endmenu
  763. source "net/Kconfig"
  764. source "drivers/Kconfig"
  765. source "fs/Kconfig"
  766. source "arch/sh/Kconfig.debug"
  767. source "security/Kconfig"
  768. source "crypto/Kconfig"
  769. source "lib/Kconfig"