Kconfig 23 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 HAVE_DEBUG_BUGVERBOSE
  17. select ARCH_HAVE_CUSTOM_GPIO_H
  18. select ARCH_HAVE_NMI_SAFE_CMPXCHG if (GUSA_RB || CPU_SH4A)
  19. select PERF_USE_VMALLOC
  20. select HAVE_DEBUG_KMEMLEAK
  21. select HAVE_KERNEL_GZIP
  22. select HAVE_KERNEL_BZIP2
  23. select HAVE_KERNEL_LZMA
  24. select HAVE_KERNEL_XZ
  25. select HAVE_KERNEL_LZO
  26. select HAVE_UID16
  27. select ARCH_WANT_IPC_PARSE_VERSION
  28. select HAVE_SYSCALL_TRACEPOINTS
  29. select HAVE_REGS_AND_STACK_ACCESS_API
  30. select HAVE_GENERIC_HARDIRQS
  31. select MAY_HAVE_SPARSE_IRQ
  32. select IRQ_FORCED_THREADING
  33. select RTC_LIB
  34. select GENERIC_ATOMIC64
  35. select GENERIC_IRQ_SHOW
  36. select GENERIC_SMP_IDLE_THREAD
  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. help
  44. The SuperH is a RISC processor targeted for use in embedded systems
  45. and consumer electronics; it was also used in the Sega Dreamcast
  46. gaming console. The SuperH port has a home page at
  47. <http://www.linux-sh.org/>.
  48. config SUPERH32
  49. def_bool ARCH = "sh"
  50. select HAVE_KPROBES
  51. select HAVE_KRETPROBES
  52. select HAVE_IOREMAP_PROT if MMU && !X2TLB
  53. select HAVE_FUNCTION_TRACER
  54. select HAVE_FTRACE_MCOUNT_RECORD
  55. select HAVE_DYNAMIC_FTRACE
  56. select HAVE_FUNCTION_TRACE_MCOUNT_TEST
  57. select HAVE_FTRACE_NMI_ENTER if DYNAMIC_FTRACE
  58. select ARCH_WANT_IPC_PARSE_VERSION
  59. select HAVE_FUNCTION_GRAPH_TRACER
  60. select HAVE_ARCH_KGDB
  61. select HAVE_HW_BREAKPOINT
  62. select HAVE_MIXED_BREAKPOINTS_REGS
  63. select PERF_EVENTS
  64. select ARCH_HIBERNATION_POSSIBLE if MMU
  65. select SPARSE_IRQ
  66. config SUPERH64
  67. def_bool ARCH = "sh64"
  68. select KALLSYMS
  69. config ARCH_DEFCONFIG
  70. string
  71. default "arch/sh/configs/shx3_defconfig" if SUPERH32
  72. default "arch/sh/configs/cayman_defconfig" if SUPERH64
  73. config RWSEM_GENERIC_SPINLOCK
  74. def_bool y
  75. config RWSEM_XCHGADD_ALGORITHM
  76. bool
  77. config GENERIC_BUG
  78. def_bool y
  79. depends on BUG && SUPERH32
  80. config GENERIC_CSUM
  81. def_bool y
  82. depends on SUPERH64
  83. config GENERIC_HWEIGHT
  84. def_bool y
  85. config IRQ_PER_CPU
  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 ARCH_NO_VIRT_TO_BUS
  126. def_bool y
  127. config ARCH_HAS_DEFAULT_IDLE
  128. def_bool y
  129. config NO_IOPORT
  130. def_bool !PCI
  131. depends on !SH_CAYMAN && !SH_SH4202_MICRODEV && !SH_SHMIN && \
  132. !SH_HP6XX && !SH_SOLUTION_ENGINE
  133. config IO_TRAPPED
  134. bool
  135. config SWAP_IO_SPACE
  136. bool
  137. config DMA_COHERENT
  138. bool
  139. config DMA_NONCOHERENT
  140. def_bool !DMA_COHERENT
  141. config NEED_DMA_MAP_STATE
  142. def_bool DMA_NONCOHERENT
  143. config NEED_SG_DMA_LENGTH
  144. def_bool y
  145. source "init/Kconfig"
  146. source "kernel/Kconfig.freezer"
  147. menu "System type"
  148. #
  149. # Processor families
  150. #
  151. config CPU_SH2
  152. bool
  153. config CPU_SH2A
  154. bool
  155. select CPU_SH2
  156. select UNCACHED_MAPPING
  157. config CPU_SH3
  158. bool
  159. select CPU_HAS_INTEVT
  160. select CPU_HAS_SR_RB
  161. select SYS_SUPPORTS_TMU
  162. config CPU_SH4
  163. bool
  164. select CPU_HAS_INTEVT
  165. select CPU_HAS_SR_RB
  166. select CPU_HAS_FPU if !CPU_SH4AL_DSP
  167. select SYS_SUPPORTS_TMU
  168. select SYS_SUPPORTS_HUGETLBFS if MMU
  169. config CPU_SH4A
  170. bool
  171. select CPU_SH4
  172. config CPU_SH4AL_DSP
  173. bool
  174. select CPU_SH4A
  175. select CPU_HAS_DSP
  176. config CPU_SH5
  177. bool
  178. select CPU_HAS_FPU
  179. select SYS_SUPPORTS_TMU
  180. select SYS_SUPPORTS_HUGETLBFS if MMU
  181. config CPU_SHX2
  182. bool
  183. config CPU_SHX3
  184. bool
  185. select DMA_COHERENT
  186. select SYS_SUPPORTS_SMP
  187. select SYS_SUPPORTS_NUMA
  188. config ARCH_SHMOBILE
  189. bool
  190. select ARCH_SUSPEND_POSSIBLE
  191. select PM
  192. select PM_RUNTIME
  193. config CPU_HAS_PMU
  194. depends on CPU_SH4 || CPU_SH4A
  195. default y
  196. bool
  197. if SUPERH32
  198. choice
  199. prompt "Processor sub-type selection"
  200. #
  201. # Processor subtypes
  202. #
  203. # SH-2 Processor Support
  204. config CPU_SUBTYPE_SH7619
  205. bool "Support SH7619 processor"
  206. select CPU_SH2
  207. select SYS_SUPPORTS_CMT
  208. # SH-2A Processor Support
  209. config CPU_SUBTYPE_SH7201
  210. bool "Support SH7201 processor"
  211. select CPU_SH2A
  212. select CPU_HAS_FPU
  213. select SYS_SUPPORTS_MTU2
  214. config CPU_SUBTYPE_SH7203
  215. bool "Support SH7203 processor"
  216. select CPU_SH2A
  217. select CPU_HAS_FPU
  218. select SYS_SUPPORTS_CMT
  219. select SYS_SUPPORTS_MTU2
  220. select ARCH_WANT_OPTIONAL_GPIOLIB
  221. select PINCTRL
  222. config CPU_SUBTYPE_SH7206
  223. bool "Support SH7206 processor"
  224. select CPU_SH2A
  225. select SYS_SUPPORTS_CMT
  226. select SYS_SUPPORTS_MTU2
  227. config CPU_SUBTYPE_SH7263
  228. bool "Support SH7263 processor"
  229. select CPU_SH2A
  230. select CPU_HAS_FPU
  231. select SYS_SUPPORTS_CMT
  232. select SYS_SUPPORTS_MTU2
  233. config CPU_SUBTYPE_SH7264
  234. bool "Support SH7264 processor"
  235. select CPU_SH2A
  236. select CPU_HAS_FPU
  237. select SYS_SUPPORTS_CMT
  238. select SYS_SUPPORTS_MTU2
  239. select PINCTRL
  240. config CPU_SUBTYPE_SH7269
  241. bool "Support SH7269 processor"
  242. select CPU_SH2A
  243. select CPU_HAS_FPU
  244. select SYS_SUPPORTS_CMT
  245. select SYS_SUPPORTS_MTU2
  246. select PINCTRL
  247. config CPU_SUBTYPE_MXG
  248. bool "Support MX-G processor"
  249. select CPU_SH2A
  250. select SYS_SUPPORTS_MTU2
  251. help
  252. Select MX-G if running on an R8A03022BG part.
  253. # SH-3 Processor Support
  254. config CPU_SUBTYPE_SH7705
  255. bool "Support SH7705 processor"
  256. select CPU_SH3
  257. config CPU_SUBTYPE_SH7706
  258. bool "Support SH7706 processor"
  259. select CPU_SH3
  260. help
  261. Select SH7706 if you have a 133 Mhz SH-3 HD6417706 CPU.
  262. config CPU_SUBTYPE_SH7707
  263. bool "Support SH7707 processor"
  264. select CPU_SH3
  265. help
  266. Select SH7707 if you have a 60 Mhz SH-3 HD6417707 CPU.
  267. config CPU_SUBTYPE_SH7708
  268. bool "Support SH7708 processor"
  269. select CPU_SH3
  270. help
  271. Select SH7708 if you have a 60 Mhz SH-3 HD6417708S or
  272. if you have a 100 Mhz SH-3 HD6417708R CPU.
  273. config CPU_SUBTYPE_SH7709
  274. bool "Support SH7709 processor"
  275. select CPU_SH3
  276. help
  277. Select SH7709 if you have a 80 Mhz SH-3 HD6417709 CPU.
  278. config CPU_SUBTYPE_SH7710
  279. bool "Support SH7710 processor"
  280. select CPU_SH3
  281. select CPU_HAS_DSP
  282. help
  283. Select SH7710 if you have a SH3-DSP SH7710 CPU.
  284. config CPU_SUBTYPE_SH7712
  285. bool "Support SH7712 processor"
  286. select CPU_SH3
  287. select CPU_HAS_DSP
  288. help
  289. Select SH7712 if you have a SH3-DSP SH7712 CPU.
  290. config CPU_SUBTYPE_SH7720
  291. bool "Support SH7720 processor"
  292. select CPU_SH3
  293. select CPU_HAS_DSP
  294. select SYS_SUPPORTS_CMT
  295. select ARCH_WANT_OPTIONAL_GPIOLIB
  296. select USB_ARCH_HAS_OHCI
  297. select USB_OHCI_SH if USB_OHCI_HCD
  298. select PINCTRL
  299. help
  300. Select SH7720 if you have a SH3-DSP SH7720 CPU.
  301. config CPU_SUBTYPE_SH7721
  302. bool "Support SH7721 processor"
  303. select CPU_SH3
  304. select CPU_HAS_DSP
  305. select SYS_SUPPORTS_CMT
  306. select USB_ARCH_HAS_OHCI
  307. select USB_OHCI_SH if USB_OHCI_HCD
  308. help
  309. Select SH7721 if you have a SH3-DSP SH7721 CPU.
  310. # SH-4 Processor Support
  311. config CPU_SUBTYPE_SH7750
  312. bool "Support SH7750 processor"
  313. select CPU_SH4
  314. help
  315. Select SH7750 if you have a 200 Mhz SH-4 HD6417750 CPU.
  316. config CPU_SUBTYPE_SH7091
  317. bool "Support SH7091 processor"
  318. select CPU_SH4
  319. help
  320. Select SH7091 if you have an SH-4 based Sega device (such as
  321. the Dreamcast, Naomi, and Naomi 2).
  322. config CPU_SUBTYPE_SH7750R
  323. bool "Support SH7750R processor"
  324. select CPU_SH4
  325. config CPU_SUBTYPE_SH7750S
  326. bool "Support SH7750S processor"
  327. select CPU_SH4
  328. config CPU_SUBTYPE_SH7751
  329. bool "Support SH7751 processor"
  330. select CPU_SH4
  331. help
  332. Select SH7751 if you have a 166 Mhz SH-4 HD6417751 CPU,
  333. or if you have a HD6417751R CPU.
  334. config CPU_SUBTYPE_SH7751R
  335. bool "Support SH7751R processor"
  336. select CPU_SH4
  337. config CPU_SUBTYPE_SH7760
  338. bool "Support SH7760 processor"
  339. select CPU_SH4
  340. config CPU_SUBTYPE_SH4_202
  341. bool "Support SH4-202 processor"
  342. select CPU_SH4
  343. # SH-4A Processor Support
  344. config CPU_SUBTYPE_SH7723
  345. bool "Support SH7723 processor"
  346. select CPU_SH4A
  347. select CPU_SHX2
  348. select ARCH_SHMOBILE
  349. select ARCH_SPARSEMEM_ENABLE
  350. select SYS_SUPPORTS_CMT
  351. select ARCH_WANT_OPTIONAL_GPIOLIB
  352. help
  353. Select SH7723 if you have an SH-MobileR2 CPU.
  354. config CPU_SUBTYPE_SH7724
  355. bool "Support SH7724 processor"
  356. select CPU_SH4A
  357. select CPU_SHX2
  358. select ARCH_SHMOBILE
  359. select ARCH_SPARSEMEM_ENABLE
  360. select SYS_SUPPORTS_CMT
  361. select ARCH_WANT_OPTIONAL_GPIOLIB
  362. help
  363. Select SH7724 if you have an SH-MobileR2R CPU.
  364. config CPU_SUBTYPE_SH7734
  365. bool "Support SH7734 processor"
  366. select CPU_SH4A
  367. select CPU_SHX2
  368. select ARCH_WANT_OPTIONAL_GPIOLIB
  369. select USB_ARCH_HAS_OHCI
  370. select USB_ARCH_HAS_EHCI
  371. help
  372. Select SH7734 if you have a SH4A SH7734 CPU.
  373. config CPU_SUBTYPE_SH7757
  374. bool "Support SH7757 processor"
  375. select CPU_SH4A
  376. select CPU_SHX2
  377. select ARCH_WANT_OPTIONAL_GPIOLIB
  378. select USB_ARCH_HAS_OHCI
  379. select USB_ARCH_HAS_EHCI
  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. config CPU_SUBTYPE_SH7786
  403. bool "Support SH7786 processor"
  404. select CPU_SH4A
  405. select CPU_SHX3
  406. select CPU_HAS_PTEAEX
  407. select GENERIC_CLOCKEVENTS_BROADCAST if SMP
  408. select ARCH_WANT_OPTIONAL_GPIOLIB
  409. select USB_ARCH_HAS_OHCI
  410. select USB_OHCI_SH if USB_OHCI_HCD
  411. select USB_ARCH_HAS_EHCI
  412. select USB_EHCI_SH if USB_EHCI_HCD
  413. config CPU_SUBTYPE_SHX3
  414. bool "Support SH-X3 processor"
  415. select CPU_SH4A
  416. select CPU_SHX3
  417. select GENERIC_CLOCKEVENTS_BROADCAST if SMP
  418. select ARCH_REQUIRE_GPIOLIB
  419. # SH4AL-DSP Processor Support
  420. config CPU_SUBTYPE_SH7343
  421. bool "Support SH7343 processor"
  422. select CPU_SH4AL_DSP
  423. select ARCH_SHMOBILE
  424. select SYS_SUPPORTS_CMT
  425. config CPU_SUBTYPE_SH7722
  426. bool "Support SH7722 processor"
  427. select CPU_SH4AL_DSP
  428. select CPU_SHX2
  429. select ARCH_SHMOBILE
  430. select ARCH_SPARSEMEM_ENABLE
  431. select SYS_SUPPORTS_NUMA
  432. select SYS_SUPPORTS_CMT
  433. select ARCH_WANT_OPTIONAL_GPIOLIB
  434. select PINCTRL
  435. config CPU_SUBTYPE_SH7366
  436. bool "Support SH7366 processor"
  437. select CPU_SH4AL_DSP
  438. select CPU_SHX2
  439. select ARCH_SHMOBILE
  440. select ARCH_SPARSEMEM_ENABLE
  441. select SYS_SUPPORTS_NUMA
  442. select SYS_SUPPORTS_CMT
  443. endchoice
  444. endif
  445. if SUPERH64
  446. choice
  447. prompt "Processor sub-type selection"
  448. # SH-5 Processor Support
  449. config CPU_SUBTYPE_SH5_101
  450. bool "Support SH5-101 processor"
  451. select CPU_SH5
  452. config CPU_SUBTYPE_SH5_103
  453. bool "Support SH5-103 processor"
  454. select CPU_SH5
  455. endchoice
  456. endif
  457. source "arch/sh/mm/Kconfig"
  458. source "arch/sh/Kconfig.cpu"
  459. source "arch/sh/boards/Kconfig"
  460. menu "Timer and clock configuration"
  461. config SH_TIMER_TMU
  462. bool "TMU timer driver"
  463. depends on SYS_SUPPORTS_TMU
  464. default y
  465. help
  466. This enables the build of the TMU timer driver.
  467. config SH_TIMER_CMT
  468. bool "CMT timer driver"
  469. depends on SYS_SUPPORTS_CMT
  470. default y
  471. help
  472. This enables build of the CMT timer driver.
  473. config SH_TIMER_MTU2
  474. bool "MTU2 timer driver"
  475. depends on SYS_SUPPORTS_MTU2
  476. default y
  477. help
  478. This enables build of the MTU2 timer driver.
  479. config SH_PCLK_FREQ
  480. int "Peripheral clock frequency (in Hz)"
  481. depends on SH_CLK_CPG_LEGACY
  482. default "31250000" if CPU_SUBTYPE_SH7619
  483. default "33333333" if CPU_SUBTYPE_SH7770 || \
  484. CPU_SUBTYPE_SH7760 || \
  485. CPU_SUBTYPE_SH7705 || \
  486. CPU_SUBTYPE_SH7203 || \
  487. CPU_SUBTYPE_SH7206 || \
  488. CPU_SUBTYPE_SH7263 || \
  489. CPU_SUBTYPE_MXG
  490. default "60000000" if CPU_SUBTYPE_SH7751 || CPU_SUBTYPE_SH7751R
  491. default "66000000" if CPU_SUBTYPE_SH4_202
  492. default "50000000"
  493. help
  494. This option is used to specify the peripheral clock frequency.
  495. This is necessary for determining the reference clock value on
  496. platforms lacking an RTC.
  497. config SH_CLK_CPG
  498. def_bool y
  499. config SH_CLK_CPG_LEGACY
  500. depends on SH_CLK_CPG
  501. def_bool y if !CPU_SUBTYPE_SH7785 && !ARCH_SHMOBILE && \
  502. !CPU_SHX3 && !CPU_SUBTYPE_SH7757 && \
  503. !CPU_SUBTYPE_SH7734 && !CPU_SUBTYPE_SH7264 && \
  504. !CPU_SUBTYPE_SH7269
  505. endmenu
  506. menu "CPU Frequency scaling"
  507. source "drivers/cpufreq/Kconfig"
  508. config SH_CPU_FREQ
  509. tristate "SuperH CPU Frequency driver"
  510. depends on CPU_FREQ
  511. select CPU_FREQ_TABLE
  512. help
  513. This adds the cpufreq driver for SuperH. Any CPU that supports
  514. clock rate rounding through the clock framework can use this
  515. driver. While it will make the kernel slightly larger, this is
  516. harmless for CPUs that don't support rate rounding. The driver
  517. will also generate a notice in the boot log before disabling
  518. itself if the CPU in question is not capable of rate rounding.
  519. For details, take a look at <file:Documentation/cpu-freq>.
  520. If unsure, say N.
  521. endmenu
  522. source "arch/sh/drivers/Kconfig"
  523. endmenu
  524. menu "Kernel features"
  525. source kernel/Kconfig.hz
  526. config KEXEC
  527. bool "kexec system call (EXPERIMENTAL)"
  528. depends on SUPERH32 && EXPERIMENTAL && MMU
  529. help
  530. kexec is a system call that implements the ability to shutdown your
  531. current kernel, and to start another kernel. It is like a reboot
  532. but it is independent of the system firmware. And like a reboot
  533. you can start any kernel with it, not just Linux.
  534. The name comes from the similarity to the exec system call.
  535. It is an ongoing process to be certain the hardware in a machine
  536. is properly shutdown, so do not be surprised if this code does not
  537. initially work for you. It may help to enable device hotplugging
  538. support. As of this writing the exact hardware interface is
  539. strongly in flux, so no good recommendation can be made.
  540. config CRASH_DUMP
  541. bool "kernel crash dumps (EXPERIMENTAL)"
  542. depends on SUPERH32 && EXPERIMENTAL && BROKEN_ON_SMP
  543. help
  544. Generate crash dump after being started by kexec.
  545. This should be normally only set in special crash dump kernels
  546. which are loaded in the main kernel with kexec-tools into
  547. a specially reserved region and then later executed after
  548. a crash by kdump/kexec. The crash dump kernel must be compiled
  549. to a memory address not used by the main kernel using
  550. PHYSICAL_START.
  551. For more details see Documentation/kdump/kdump.txt
  552. config KEXEC_JUMP
  553. bool "kexec jump (EXPERIMENTAL)"
  554. depends on SUPERH32 && KEXEC && HIBERNATION && EXPERIMENTAL
  555. help
  556. Jump between original kernel and kexeced kernel and invoke
  557. code via KEXEC
  558. config PHYSICAL_START
  559. hex "Physical address where the kernel is loaded" if (EXPERT || CRASH_DUMP)
  560. default MEMORY_START
  561. ---help---
  562. This gives the physical address where the kernel is loaded
  563. and is ordinarily the same as MEMORY_START.
  564. Different values are primarily used in the case of kexec on panic
  565. where the fail safe kernel needs to run at a different address
  566. than the panic-ed kernel.
  567. config SECCOMP
  568. bool "Enable seccomp to safely compute untrusted bytecode"
  569. depends on PROC_FS
  570. help
  571. This kernel feature is useful for number crunching applications
  572. that may need to compute untrusted bytecode during their
  573. execution. By using pipes or other transports made available to
  574. the process as file descriptors supporting the read/write
  575. syscalls, it's possible to isolate those applications in
  576. their own address space using seccomp. Once seccomp is
  577. enabled via prctl, it cannot be disabled and the task is only
  578. allowed to execute a few safe syscalls defined by each seccomp
  579. mode.
  580. If unsure, say N.
  581. config CC_STACKPROTECTOR
  582. bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
  583. depends on SUPERH32 && EXPERIMENTAL
  584. help
  585. This option turns on the -fstack-protector GCC feature. This
  586. feature puts, at the beginning of functions, a canary value on
  587. the stack just before the return address, and validates
  588. the value just before actually returning. Stack based buffer
  589. overflows (that need to overwrite this return address) now also
  590. overwrite the canary, which gets detected and the attack is then
  591. neutralized via a kernel panic.
  592. This feature requires gcc version 4.2 or above.
  593. config SMP
  594. bool "Symmetric multi-processing support"
  595. depends on SYS_SUPPORTS_SMP
  596. select USE_GENERIC_SMP_HELPERS
  597. ---help---
  598. This enables support for systems with more than one CPU. If you have
  599. a system with only one CPU, like most personal computers, say N. If
  600. you have a system with more than one CPU, say Y.
  601. If you say N here, the kernel will run on single and multiprocessor
  602. machines, but will use only one CPU of a multiprocessor machine. If
  603. you say Y here, the kernel will run on many, but not all,
  604. singleprocessor machines. On a singleprocessor machine, the kernel
  605. will run faster if you say N here.
  606. People using multiprocessor machines who say Y here should also say
  607. Y to "Enhanced Real Time Clock Support", below.
  608. See also <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO
  609. available at <http://www.tldp.org/docs.html#howto>.
  610. If you don't know what to do here, say N.
  611. config NR_CPUS
  612. int "Maximum number of CPUs (2-32)"
  613. range 2 32
  614. depends on SMP
  615. default "4" if CPU_SUBTYPE_SHX3
  616. default "2"
  617. help
  618. This allows you to specify the maximum number of CPUs which this
  619. kernel will support. The maximum supported value is 32 and the
  620. minimum value which makes sense is 2.
  621. This is purely to save memory - each supported CPU adds
  622. approximately eight kilobytes to the kernel image.
  623. config HOTPLUG_CPU
  624. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  625. depends on SMP && HOTPLUG && EXPERIMENTAL
  626. help
  627. Say Y here to experiment with turning CPUs off and on. CPUs
  628. can be controlled through /sys/devices/system/cpu.
  629. source "kernel/Kconfig.preempt"
  630. config GUSA
  631. def_bool y
  632. depends on !SMP && SUPERH32
  633. help
  634. This enables support for gUSA (general UserSpace Atomicity).
  635. This is the default implementation for both UP and non-ll/sc
  636. CPUs, and is used by the libc, amongst others.
  637. For additional information, design information can be found
  638. in <http://lc.linux.or.jp/lc2002/papers/niibe0919p.pdf>.
  639. This should only be disabled for special cases where alternate
  640. atomicity implementations exist.
  641. config GUSA_RB
  642. bool "Implement atomic operations by roll-back (gRB) (EXPERIMENTAL)"
  643. depends on GUSA && CPU_SH3 || (CPU_SH4 && !CPU_SH4A)
  644. help
  645. Enabling this option will allow the kernel to implement some
  646. atomic operations using a software implementation of load-locked/
  647. store-conditional (LLSC). On machines which do not have hardware
  648. LLSC, this should be more efficient than the other alternative of
  649. disabling interrupts around the atomic sequence.
  650. config HW_PERF_EVENTS
  651. bool "Enable hardware performance counter support for perf events"
  652. depends on PERF_EVENTS && CPU_HAS_PMU
  653. default y
  654. help
  655. Enable hardware performance counter support for perf events. If
  656. disabled, perf events will use software events only.
  657. source "drivers/sh/Kconfig"
  658. endmenu
  659. menu "Boot options"
  660. config ZERO_PAGE_OFFSET
  661. hex
  662. default "0x00010000" if PAGE_SIZE_64KB || SH_RTS7751R2D || \
  663. SH_7751_SOLUTION_ENGINE
  664. default "0x00004000" if PAGE_SIZE_16KB || SH_SH03
  665. default "0x00002000" if PAGE_SIZE_8KB
  666. default "0x00001000"
  667. help
  668. This sets the default offset of zero page.
  669. config BOOT_LINK_OFFSET
  670. hex
  671. default "0x00210000" if SH_SHMIN
  672. default "0x00400000" if SH_CAYMAN
  673. default "0x00810000" if SH_7780_SOLUTION_ENGINE
  674. default "0x009e0000" if SH_TITAN
  675. default "0x01800000" if SH_SDK7780
  676. default "0x02000000" if SH_EDOSK7760
  677. default "0x00800000"
  678. help
  679. This option allows you to set the link address offset of the zImage.
  680. This can be useful if you are on a board which has a small amount of
  681. memory.
  682. config ENTRY_OFFSET
  683. hex
  684. default "0x00001000" if PAGE_SIZE_4KB
  685. default "0x00002000" if PAGE_SIZE_8KB
  686. default "0x00004000" if PAGE_SIZE_16KB
  687. default "0x00010000" if PAGE_SIZE_64KB
  688. default "0x00000000"
  689. config ROMIMAGE_MMCIF
  690. bool "Include MMCIF loader in romImage (EXPERIMENTAL)"
  691. depends on CPU_SUBTYPE_SH7724 && EXPERIMENTAL
  692. help
  693. Say Y here to include experimental MMCIF loading code in
  694. romImage. With this enabled it is possible to write the romImage
  695. kernel image to an MMC card and boot the kernel straight from
  696. the reset vector. At reset the processor Mask ROM will load the
  697. first part of the romImage which in turn loads the rest the kernel
  698. image to RAM using the MMCIF hardware block.
  699. choice
  700. prompt "Kernel command line"
  701. optional
  702. default CMDLINE_OVERWRITE
  703. help
  704. Setting this option allows the kernel command line arguments
  705. to be set.
  706. config CMDLINE_OVERWRITE
  707. bool "Overwrite bootloader kernel arguments"
  708. help
  709. Given string will overwrite any arguments passed in by
  710. a bootloader.
  711. config CMDLINE_EXTEND
  712. bool "Extend bootloader kernel arguments"
  713. help
  714. Given string will be concatenated with arguments passed in
  715. by a bootloader.
  716. endchoice
  717. config CMDLINE
  718. string "Kernel command line arguments string"
  719. depends on CMDLINE_OVERWRITE || CMDLINE_EXTEND
  720. default "console=ttySC1,115200"
  721. endmenu
  722. menu "Bus options"
  723. config SUPERHYWAY
  724. tristate "SuperHyway Bus support"
  725. depends on CPU_SUBTYPE_SH4_202
  726. config MAPLE
  727. bool "Maple Bus support"
  728. depends on SH_DREAMCAST
  729. help
  730. The Maple Bus is SEGA's serial communication bus for peripherals
  731. on the Dreamcast. Without this bus support you won't be able to
  732. get your Dreamcast keyboard etc to work, so most users
  733. probably want to say 'Y' here, unless you are only using the
  734. Dreamcast with a serial line terminal or a remote network
  735. connection.
  736. config PCI
  737. bool "PCI support"
  738. depends on SYS_SUPPORTS_PCI
  739. select PCI_DOMAINS
  740. select GENERIC_PCI_IOMAP
  741. select NO_GENERIC_PCI_IOPORT_MAP
  742. help
  743. Find out whether you have a PCI motherboard. PCI is the name of a
  744. bus system, i.e. the way the CPU talks to the other stuff inside
  745. your box. If you have PCI, say Y, otherwise N.
  746. config PCI_DOMAINS
  747. bool
  748. source "drivers/pci/pcie/Kconfig"
  749. source "drivers/pci/Kconfig"
  750. source "drivers/pcmcia/Kconfig"
  751. source "drivers/pci/hotplug/Kconfig"
  752. endmenu
  753. menu "Executable file formats"
  754. source "fs/Kconfig.binfmt"
  755. endmenu
  756. menu "Power management options (EXPERIMENTAL)"
  757. depends on EXPERIMENTAL
  758. source "kernel/power/Kconfig"
  759. source "drivers/cpuidle/Kconfig"
  760. endmenu
  761. source "net/Kconfig"
  762. source "drivers/Kconfig"
  763. source "fs/Kconfig"
  764. source "arch/sh/Kconfig.debug"
  765. source "security/Kconfig"
  766. source "crypto/Kconfig"
  767. source "lib/Kconfig"