Kconfig 36 KB

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  1. #
  2. # For a description of the syntax of this configuration file,
  3. # see Documentation/kbuild/kconfig-language.txt.
  4. #
  5. mainmenu "Linux Kernel Configuration"
  6. config ARM
  7. bool
  8. default y
  9. select HAVE_AOUT
  10. select HAVE_IDE
  11. select RTC_LIB
  12. select SYS_SUPPORTS_APM_EMULATION
  13. select HAVE_OPROFILE
  14. select HAVE_ARCH_KGDB
  15. select HAVE_KPROBES if (!XIP_KERNEL)
  16. select HAVE_KRETPROBES if (HAVE_KPROBES)
  17. select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
  18. select HAVE_GENERIC_DMA_COHERENT
  19. help
  20. The ARM series is a line of low-power-consumption RISC chip designs
  21. licensed by ARM Ltd and targeted at embedded applications and
  22. handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
  23. manufactured, but legacy ARM-based PC hardware remains popular in
  24. Europe. There is an ARM Linux project with a web page at
  25. <http://www.arm.linux.org.uk/>.
  26. config HAVE_PWM
  27. bool
  28. config SYS_SUPPORTS_APM_EMULATION
  29. bool
  30. config GENERIC_GPIO
  31. bool
  32. config GENERIC_TIME
  33. bool
  34. config GENERIC_CLOCKEVENTS
  35. bool
  36. config GENERIC_CLOCKEVENTS_BROADCAST
  37. bool
  38. depends on GENERIC_CLOCKEVENTS
  39. default y if SMP && !LOCAL_TIMERS
  40. config MMU
  41. bool
  42. default y
  43. config NO_IOPORT
  44. bool
  45. config EISA
  46. bool
  47. ---help---
  48. The Extended Industry Standard Architecture (EISA) bus was
  49. developed as an open alternative to the IBM MicroChannel bus.
  50. The EISA bus provided some of the features of the IBM MicroChannel
  51. bus while maintaining backward compatibility with cards made for
  52. the older ISA bus. The EISA bus saw limited use between 1988 and
  53. 1995 when it was made obsolete by the PCI bus.
  54. Say Y here if you are building a kernel for an EISA-based machine.
  55. Otherwise, say N.
  56. config SBUS
  57. bool
  58. config MCA
  59. bool
  60. help
  61. MicroChannel Architecture is found in some IBM PS/2 machines and
  62. laptops. It is a bus system similar to PCI or ISA. See
  63. <file:Documentation/mca.txt> (and especially the web page given
  64. there) before attempting to build an MCA bus kernel.
  65. config GENERIC_HARDIRQS
  66. bool
  67. default y
  68. config STACKTRACE_SUPPORT
  69. bool
  70. default y
  71. config HAVE_LATENCYTOP_SUPPORT
  72. bool
  73. depends on !SMP
  74. default y
  75. config LOCKDEP_SUPPORT
  76. bool
  77. default y
  78. config TRACE_IRQFLAGS_SUPPORT
  79. bool
  80. default y
  81. config HARDIRQS_SW_RESEND
  82. bool
  83. default y
  84. config GENERIC_IRQ_PROBE
  85. bool
  86. default y
  87. config GENERIC_LOCKBREAK
  88. bool
  89. default y
  90. depends on SMP && PREEMPT
  91. config RWSEM_GENERIC_SPINLOCK
  92. bool
  93. default y
  94. config RWSEM_XCHGADD_ALGORITHM
  95. bool
  96. config ARCH_HAS_ILOG2_U32
  97. bool
  98. config ARCH_HAS_ILOG2_U64
  99. bool
  100. config GENERIC_HWEIGHT
  101. bool
  102. default y
  103. config GENERIC_CALIBRATE_DELAY
  104. bool
  105. default y
  106. config ARCH_MAY_HAVE_PC_FDC
  107. bool
  108. config ZONE_DMA
  109. bool
  110. config GENERIC_ISA_DMA
  111. bool
  112. config FIQ
  113. bool
  114. config ARCH_MTD_XIP
  115. bool
  116. config GENERIC_HARDIRQS_NO__DO_IRQ
  117. def_bool y
  118. if OPROFILE
  119. config OPROFILE_ARMV6
  120. def_bool y
  121. depends on CPU_V6 && !SMP
  122. select OPROFILE_ARM11_CORE
  123. config OPROFILE_MPCORE
  124. def_bool y
  125. depends on CPU_V6 && SMP
  126. select OPROFILE_ARM11_CORE
  127. config OPROFILE_ARM11_CORE
  128. bool
  129. config OPROFILE_ARMV7
  130. def_bool y
  131. depends on CPU_V7 && !SMP
  132. bool
  133. endif
  134. config VECTORS_BASE
  135. hex
  136. default 0xffff0000 if MMU || CPU_HIGH_VECTOR
  137. default DRAM_BASE if REMAP_VECTORS_TO_RAM
  138. default 0x00000000
  139. help
  140. The base address of exception vectors.
  141. source "init/Kconfig"
  142. source "kernel/Kconfig.freezer"
  143. menu "System Type"
  144. choice
  145. prompt "ARM system type"
  146. default ARCH_VERSATILE
  147. config ARCH_AAEC2000
  148. bool "Agilent AAEC-2000 based"
  149. select CPU_ARM920T
  150. select ARM_AMBA
  151. select HAVE_CLK
  152. help
  153. This enables support for systems based on the Agilent AAEC-2000
  154. config ARCH_INTEGRATOR
  155. bool "ARM Ltd. Integrator family"
  156. select ARM_AMBA
  157. select HAVE_CLK
  158. select COMMON_CLKDEV
  159. select ICST525
  160. help
  161. Support for ARM's Integrator platform.
  162. config ARCH_REALVIEW
  163. bool "ARM Ltd. RealView family"
  164. select ARM_AMBA
  165. select HAVE_CLK
  166. select COMMON_CLKDEV
  167. select ICST307
  168. select GENERIC_TIME
  169. select GENERIC_CLOCKEVENTS
  170. help
  171. This enables support for ARM Ltd RealView boards.
  172. config ARCH_VERSATILE
  173. bool "ARM Ltd. Versatile family"
  174. select ARM_AMBA
  175. select ARM_VIC
  176. select HAVE_CLK
  177. select COMMON_CLKDEV
  178. select ICST307
  179. select GENERIC_TIME
  180. select GENERIC_CLOCKEVENTS
  181. help
  182. This enables support for ARM Ltd Versatile board.
  183. config ARCH_AT91
  184. bool "Atmel AT91"
  185. select GENERIC_GPIO
  186. select ARCH_REQUIRE_GPIOLIB
  187. select HAVE_CLK
  188. help
  189. This enables support for systems based on the Atmel AT91RM9200,
  190. AT91SAM9 and AT91CAP9 processors.
  191. config ARCH_CLPS711X
  192. bool "Cirrus Logic CLPS711x/EP721x-based"
  193. select CPU_ARM720T
  194. help
  195. Support for Cirrus Logic 711x/721x based boards.
  196. config ARCH_GEMINI
  197. bool "Cortina Systems Gemini"
  198. select CPU_FA526
  199. select GENERIC_GPIO
  200. select ARCH_REQUIRE_GPIOLIB
  201. help
  202. Support for the Cortina Systems Gemini family SoCs
  203. config ARCH_EBSA110
  204. bool "EBSA-110"
  205. select CPU_SA110
  206. select ISA
  207. select NO_IOPORT
  208. help
  209. This is an evaluation board for the StrongARM processor available
  210. from Digital. It has limited hardware on-board, including an
  211. Ethernet interface, two PCMCIA sockets, two serial ports and a
  212. parallel port.
  213. config ARCH_EP93XX
  214. bool "EP93xx-based"
  215. select CPU_ARM920T
  216. select ARM_AMBA
  217. select ARM_VIC
  218. select GENERIC_GPIO
  219. select HAVE_CLK
  220. select COMMON_CLKDEV
  221. select ARCH_REQUIRE_GPIOLIB
  222. select ARCH_HAS_HOLES_MEMORYMODEL
  223. help
  224. This enables support for the Cirrus EP93xx series of CPUs.
  225. config ARCH_FOOTBRIDGE
  226. bool "FootBridge"
  227. select CPU_SA110
  228. select FOOTBRIDGE
  229. help
  230. Support for systems based on the DC21285 companion chip
  231. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  232. config ARCH_MXC
  233. bool "Freescale MXC/iMX-based"
  234. select GENERIC_TIME
  235. select GENERIC_CLOCKEVENTS
  236. select ARCH_MTD_XIP
  237. select GENERIC_GPIO
  238. select ARCH_REQUIRE_GPIOLIB
  239. select HAVE_CLK
  240. help
  241. Support for Freescale MXC/iMX-based family of processors
  242. config ARCH_NETX
  243. bool "Hilscher NetX based"
  244. select CPU_ARM926T
  245. select ARM_VIC
  246. select GENERIC_CLOCKEVENTS
  247. select GENERIC_TIME
  248. help
  249. This enables support for systems based on the Hilscher NetX Soc
  250. config ARCH_H720X
  251. bool "Hynix HMS720x-based"
  252. select CPU_ARM720T
  253. select ISA_DMA_API
  254. help
  255. This enables support for systems based on the Hynix HMS720x
  256. config ARCH_IOP13XX
  257. bool "IOP13xx-based"
  258. depends on MMU
  259. select CPU_XSC3
  260. select PLAT_IOP
  261. select PCI
  262. select ARCH_SUPPORTS_MSI
  263. select VMSPLIT_1G
  264. help
  265. Support for Intel's IOP13XX (XScale) family of processors.
  266. config ARCH_IOP32X
  267. bool "IOP32x-based"
  268. depends on MMU
  269. select CPU_XSCALE
  270. select PLAT_IOP
  271. select PCI
  272. select GENERIC_GPIO
  273. select ARCH_REQUIRE_GPIOLIB
  274. help
  275. Support for Intel's 80219 and IOP32X (XScale) family of
  276. processors.
  277. config ARCH_IOP33X
  278. bool "IOP33x-based"
  279. depends on MMU
  280. select CPU_XSCALE
  281. select PLAT_IOP
  282. select PCI
  283. select GENERIC_GPIO
  284. select ARCH_REQUIRE_GPIOLIB
  285. help
  286. Support for Intel's IOP33X (XScale) family of processors.
  287. config ARCH_IXP23XX
  288. bool "IXP23XX-based"
  289. depends on MMU
  290. select CPU_XSC3
  291. select PCI
  292. help
  293. Support for Intel's IXP23xx (XScale) family of processors.
  294. config ARCH_IXP2000
  295. bool "IXP2400/2800-based"
  296. depends on MMU
  297. select CPU_XSCALE
  298. select PCI
  299. help
  300. Support for Intel's IXP2400/2800 (XScale) family of processors.
  301. config ARCH_IXP4XX
  302. bool "IXP4xx-based"
  303. depends on MMU
  304. select CPU_XSCALE
  305. select GENERIC_GPIO
  306. select GENERIC_TIME
  307. select GENERIC_CLOCKEVENTS
  308. select DMABOUNCE if PCI
  309. help
  310. Support for Intel's IXP4XX (XScale) family of processors.
  311. config ARCH_L7200
  312. bool "LinkUp-L7200"
  313. select CPU_ARM720T
  314. select FIQ
  315. help
  316. Say Y here if you intend to run this kernel on a LinkUp Systems
  317. L7200 Software Development Board which uses an ARM720T processor.
  318. Information on this board can be obtained at:
  319. <http://www.linkupsys.com/>
  320. If you have any questions or comments about the Linux kernel port
  321. to this board, send e-mail to <sjhill@cotw.com>.
  322. config ARCH_KIRKWOOD
  323. bool "Marvell Kirkwood"
  324. select CPU_FEROCEON
  325. select PCI
  326. select GENERIC_GPIO
  327. select ARCH_REQUIRE_GPIOLIB
  328. select GENERIC_TIME
  329. select GENERIC_CLOCKEVENTS
  330. select PLAT_ORION
  331. help
  332. Support for the following Marvell Kirkwood series SoCs:
  333. 88F6180, 88F6192 and 88F6281.
  334. config ARCH_LOKI
  335. bool "Marvell Loki (88RC8480)"
  336. select CPU_FEROCEON
  337. select GENERIC_TIME
  338. select GENERIC_CLOCKEVENTS
  339. select PLAT_ORION
  340. help
  341. Support for the Marvell Loki (88RC8480) SoC.
  342. config ARCH_MV78XX0
  343. bool "Marvell MV78xx0"
  344. select CPU_FEROCEON
  345. select PCI
  346. select GENERIC_GPIO
  347. select ARCH_REQUIRE_GPIOLIB
  348. select GENERIC_TIME
  349. select GENERIC_CLOCKEVENTS
  350. select PLAT_ORION
  351. help
  352. Support for the following Marvell MV78xx0 series SoCs:
  353. MV781x0, MV782x0.
  354. config ARCH_ORION5X
  355. bool "Marvell Orion"
  356. depends on MMU
  357. select CPU_FEROCEON
  358. select PCI
  359. select GENERIC_GPIO
  360. select ARCH_REQUIRE_GPIOLIB
  361. select GENERIC_TIME
  362. select GENERIC_CLOCKEVENTS
  363. select PLAT_ORION
  364. help
  365. Support for the following Marvell Orion 5x series SoCs:
  366. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  367. Orion-2 (5281), Orion-1-90 (6183).
  368. config ARCH_MMP
  369. bool "Marvell PXA168/910"
  370. depends on MMU
  371. select GENERIC_GPIO
  372. select ARCH_REQUIRE_GPIOLIB
  373. select HAVE_CLK
  374. select COMMON_CLKDEV
  375. select GENERIC_TIME
  376. select GENERIC_CLOCKEVENTS
  377. select TICK_ONESHOT
  378. select PLAT_PXA
  379. help
  380. Support for Marvell's PXA168/910 processor line.
  381. config ARCH_KS8695
  382. bool "Micrel/Kendin KS8695"
  383. select CPU_ARM922T
  384. select GENERIC_GPIO
  385. select ARCH_REQUIRE_GPIOLIB
  386. help
  387. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  388. System-on-Chip devices.
  389. config ARCH_NS9XXX
  390. bool "NetSilicon NS9xxx"
  391. select CPU_ARM926T
  392. select GENERIC_GPIO
  393. select GENERIC_TIME
  394. select GENERIC_CLOCKEVENTS
  395. select HAVE_CLK
  396. help
  397. Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
  398. System.
  399. <http://www.digi.com/products/microprocessors/index.jsp>
  400. config ARCH_W90X900
  401. bool "Nuvoton W90X900 CPU"
  402. select CPU_ARM926T
  403. help
  404. Support for Nuvoton (Winbond logic dept.) ARM9 processor,You
  405. can login www.mcuos.com or www.nuvoton.com to know more.
  406. config ARCH_PNX4008
  407. bool "Philips Nexperia PNX4008 Mobile"
  408. select CPU_ARM926T
  409. select HAVE_CLK
  410. help
  411. This enables support for Philips PNX4008 mobile platform.
  412. config ARCH_PXA
  413. bool "PXA2xx/PXA3xx-based"
  414. depends on MMU
  415. select ARCH_MTD_XIP
  416. select GENERIC_GPIO
  417. select HAVE_CLK
  418. select COMMON_CLKDEV
  419. select ARCH_REQUIRE_GPIOLIB
  420. select GENERIC_TIME
  421. select GENERIC_CLOCKEVENTS
  422. select TICK_ONESHOT
  423. select PLAT_PXA
  424. help
  425. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  426. config ARCH_MSM
  427. bool "Qualcomm MSM"
  428. select CPU_V6
  429. select GENERIC_TIME
  430. select GENERIC_CLOCKEVENTS
  431. help
  432. Support for Qualcomm MSM7K based systems. This runs on the ARM11
  433. apps processor of the MSM7K and depends on a shared memory
  434. interface to the ARM9 modem processor which runs the baseband stack
  435. and controls some vital subsystems (clock and power control, etc).
  436. config ARCH_RPC
  437. bool "RiscPC"
  438. select ARCH_ACORN
  439. select FIQ
  440. select TIMER_ACORN
  441. select ARCH_MAY_HAVE_PC_FDC
  442. select HAVE_PATA_PLATFORM
  443. select ISA_DMA_API
  444. select NO_IOPORT
  445. select ARCH_SPARSEMEM_ENABLE
  446. help
  447. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  448. CD-ROM interface, serial and parallel port, and the floppy drive.
  449. config ARCH_SA1100
  450. bool "SA1100-based"
  451. select CPU_SA1100
  452. select ISA
  453. select ARCH_SPARSEMEM_ENABLE
  454. select ARCH_MTD_XIP
  455. select GENERIC_GPIO
  456. select GENERIC_TIME
  457. select GENERIC_CLOCKEVENTS
  458. select HAVE_CLK
  459. select TICK_ONESHOT
  460. select ARCH_REQUIRE_GPIOLIB
  461. help
  462. Support for StrongARM 11x0 based boards.
  463. config ARCH_S3C2410
  464. bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
  465. select GENERIC_GPIO
  466. select HAVE_CLK
  467. help
  468. Samsung S3C2410X CPU based systems, such as the Simtec Electronics
  469. BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
  470. the Samsung SMDK2410 development board (and derivatives).
  471. config ARCH_S3C64XX
  472. bool "Samsung S3C64XX"
  473. select GENERIC_GPIO
  474. select HAVE_CLK
  475. help
  476. Samsung S3C64XX series based systems
  477. config ARCH_SHARK
  478. bool "Shark"
  479. select CPU_SA110
  480. select ISA
  481. select ISA_DMA
  482. select ZONE_DMA
  483. select PCI
  484. help
  485. Support for the StrongARM based Digital DNARD machine, also known
  486. as "Shark" (<http://www.shark-linux.de/shark.html>).
  487. config ARCH_LH7A40X
  488. bool "Sharp LH7A40X"
  489. select CPU_ARM922T
  490. select ARCH_DISCONTIGMEM_ENABLE if !LH7A40X_CONTIGMEM
  491. select ARCH_SPARSEMEM_ENABLE if !LH7A40X_CONTIGMEM
  492. help
  493. Say Y here for systems based on one of the Sharp LH7A40X
  494. System on a Chip processors. These CPUs include an ARM922T
  495. core with a wide array of integrated devices for
  496. hand-held and low-power applications.
  497. config ARCH_DAVINCI
  498. bool "TI DaVinci"
  499. select CPU_ARM926T
  500. select GENERIC_TIME
  501. select GENERIC_CLOCKEVENTS
  502. select GENERIC_GPIO
  503. select ARCH_REQUIRE_GPIOLIB
  504. select HAVE_CLK
  505. select ZONE_DMA
  506. select HAVE_IDE
  507. select COMMON_CLKDEV
  508. select GENERIC_ALLOCATOR
  509. help
  510. Support for TI's DaVinci platform.
  511. config ARCH_OMAP
  512. bool "TI OMAP"
  513. select GENERIC_GPIO
  514. select HAVE_CLK
  515. select ARCH_REQUIRE_GPIOLIB
  516. select GENERIC_TIME
  517. select GENERIC_CLOCKEVENTS
  518. help
  519. Support for TI's OMAP platform (OMAP1 and OMAP2).
  520. endchoice
  521. source "arch/arm/mach-clps711x/Kconfig"
  522. source "arch/arm/mach-ep93xx/Kconfig"
  523. source "arch/arm/mach-footbridge/Kconfig"
  524. source "arch/arm/mach-gemini/Kconfig"
  525. source "arch/arm/mach-integrator/Kconfig"
  526. source "arch/arm/mach-iop32x/Kconfig"
  527. source "arch/arm/mach-iop33x/Kconfig"
  528. source "arch/arm/mach-iop13xx/Kconfig"
  529. source "arch/arm/mach-ixp4xx/Kconfig"
  530. source "arch/arm/mach-ixp2000/Kconfig"
  531. source "arch/arm/mach-ixp23xx/Kconfig"
  532. source "arch/arm/mach-loki/Kconfig"
  533. source "arch/arm/mach-mv78xx0/Kconfig"
  534. source "arch/arm/mach-pxa/Kconfig"
  535. source "arch/arm/plat-pxa/Kconfig"
  536. source "arch/arm/mach-mmp/Kconfig"
  537. source "arch/arm/mach-sa1100/Kconfig"
  538. source "arch/arm/plat-omap/Kconfig"
  539. source "arch/arm/mach-omap1/Kconfig"
  540. source "arch/arm/mach-omap2/Kconfig"
  541. source "arch/arm/mach-orion5x/Kconfig"
  542. source "arch/arm/mach-kirkwood/Kconfig"
  543. source "arch/arm/plat-s3c24xx/Kconfig"
  544. source "arch/arm/plat-s3c64xx/Kconfig"
  545. source "arch/arm/plat-s3c/Kconfig"
  546. if ARCH_S3C2410
  547. source "arch/arm/mach-s3c2400/Kconfig"
  548. source "arch/arm/mach-s3c2410/Kconfig"
  549. source "arch/arm/mach-s3c2412/Kconfig"
  550. source "arch/arm/mach-s3c2440/Kconfig"
  551. source "arch/arm/mach-s3c2442/Kconfig"
  552. source "arch/arm/mach-s3c2443/Kconfig"
  553. endif
  554. if ARCH_S3C64XX
  555. source "arch/arm/mach-s3c6400/Kconfig"
  556. source "arch/arm/mach-s3c6410/Kconfig"
  557. endif
  558. source "arch/arm/mach-lh7a40x/Kconfig"
  559. source "arch/arm/mach-h720x/Kconfig"
  560. source "arch/arm/mach-versatile/Kconfig"
  561. source "arch/arm/mach-aaec2000/Kconfig"
  562. source "arch/arm/mach-realview/Kconfig"
  563. source "arch/arm/mach-at91/Kconfig"
  564. source "arch/arm/plat-mxc/Kconfig"
  565. source "arch/arm/mach-netx/Kconfig"
  566. source "arch/arm/mach-ns9xxx/Kconfig"
  567. source "arch/arm/mach-davinci/Kconfig"
  568. source "arch/arm/mach-ks8695/Kconfig"
  569. source "arch/arm/mach-msm/Kconfig"
  570. source "arch/arm/mach-w90x900/Kconfig"
  571. # Definitions to make life easier
  572. config ARCH_ACORN
  573. bool
  574. config PLAT_IOP
  575. bool
  576. config PLAT_ORION
  577. bool
  578. config PLAT_PXA
  579. bool
  580. source arch/arm/mm/Kconfig
  581. config IWMMXT
  582. bool "Enable iWMMXt support"
  583. depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK
  584. default y if PXA27x || PXA3xx || ARCH_MMP
  585. help
  586. Enable support for iWMMXt context switching at run time if
  587. running on a CPU that supports it.
  588. # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
  589. config XSCALE_PMU
  590. bool
  591. depends on CPU_XSCALE && !XSCALE_PMU_TIMER
  592. default y
  593. if !MMU
  594. source "arch/arm/Kconfig-nommu"
  595. endif
  596. config ARM_ERRATA_411920
  597. bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
  598. depends on CPU_V6 && !SMP
  599. help
  600. Invalidation of the Instruction Cache operation can
  601. fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
  602. It does not affect the MPCore. This option enables the ARM Ltd.
  603. recommended workaround.
  604. config ARM_ERRATA_430973
  605. bool "ARM errata: Stale prediction on replaced interworking branch"
  606. depends on CPU_V7
  607. help
  608. This option enables the workaround for the 430973 Cortex-A8
  609. (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
  610. interworking branch is replaced with another code sequence at the
  611. same virtual address, whether due to self-modifying code or virtual
  612. to physical address re-mapping, Cortex-A8 does not recover from the
  613. stale interworking branch prediction. This results in Cortex-A8
  614. executing the new code sequence in the incorrect ARM or Thumb state.
  615. The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
  616. and also flushes the branch target cache at every context switch.
  617. Note that setting specific bits in the ACTLR register may not be
  618. available in non-secure mode.
  619. config ARM_ERRATA_458693
  620. bool "ARM errata: Processor deadlock when a false hazard is created"
  621. depends on CPU_V7
  622. help
  623. This option enables the workaround for the 458693 Cortex-A8 (r2p0)
  624. erratum. For very specific sequences of memory operations, it is
  625. possible for a hazard condition intended for a cache line to instead
  626. be incorrectly associated with a different cache line. This false
  627. hazard might then cause a processor deadlock. The workaround enables
  628. the L1 caching of the NEON accesses and disables the PLD instruction
  629. in the ACTLR register. Note that setting specific bits in the ACTLR
  630. register may not be available in non-secure mode.
  631. config ARM_ERRATA_460075
  632. bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
  633. depends on CPU_V7
  634. help
  635. This option enables the workaround for the 460075 Cortex-A8 (r2p0)
  636. erratum. Any asynchronous access to the L2 cache may encounter a
  637. situation in which recent store transactions to the L2 cache are lost
  638. and overwritten with stale memory contents from external memory. The
  639. workaround disables the write-allocate mode for the L2 cache via the
  640. ACTLR register. Note that setting specific bits in the ACTLR register
  641. may not be available in non-secure mode.
  642. endmenu
  643. source "arch/arm/common/Kconfig"
  644. config FORCE_MAX_ZONEORDER
  645. int
  646. depends on SA1111
  647. default "9"
  648. menu "Bus support"
  649. config ARM_AMBA
  650. bool
  651. config ISA
  652. bool
  653. help
  654. Find out whether you have ISA slots on your motherboard. ISA is the
  655. name of a bus system, i.e. the way the CPU talks to the other stuff
  656. inside your box. Other bus systems are PCI, EISA, MicroChannel
  657. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  658. newer boards don't support it. If you have ISA, say Y, otherwise N.
  659. # Select ISA DMA controller support
  660. config ISA_DMA
  661. bool
  662. select ISA_DMA_API
  663. # Select ISA DMA interface
  664. config ISA_DMA_API
  665. bool
  666. config PCI
  667. bool "PCI support" if ARCH_INTEGRATOR_AP || ARCH_VERSATILE_PB || ARCH_IXP4XX || ARCH_KS8695 || MACH_ARMCORE
  668. help
  669. Find out whether you have a PCI motherboard. PCI is the name of a
  670. bus system, i.e. the way the CPU talks to the other stuff inside
  671. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  672. VESA. If you have PCI, say Y, otherwise N.
  673. config PCI_SYSCALL
  674. def_bool PCI
  675. # Select the host bridge type
  676. config PCI_HOST_VIA82C505
  677. bool
  678. depends on PCI && ARCH_SHARK
  679. default y
  680. config PCI_HOST_ITE8152
  681. bool
  682. depends on PCI && MACH_ARMCORE
  683. default y
  684. select DMABOUNCE
  685. source "drivers/pci/Kconfig"
  686. source "drivers/pcmcia/Kconfig"
  687. endmenu
  688. menu "Kernel Features"
  689. source "kernel/time/Kconfig"
  690. config SMP
  691. bool "Symmetric Multi-Processing (EXPERIMENTAL)"
  692. depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP ||ARCH_OMAP4)
  693. depends on GENERIC_CLOCKEVENTS
  694. select USE_GENERIC_SMP_HELPERS
  695. select HAVE_ARM_SCU if (ARCH_REALVIEW || ARCH_OMAP4)
  696. help
  697. This enables support for systems with more than one CPU. If you have
  698. a system with only one CPU, like most personal computers, say N. If
  699. you have a system with more than one CPU, say Y.
  700. If you say N here, the kernel will run on single and multiprocessor
  701. machines, but will use only one CPU of a multiprocessor machine. If
  702. you say Y here, the kernel will run on many, but not all, single
  703. processor machines. On a single processor machine, the kernel will
  704. run faster if you say N here.
  705. See also <file:Documentation/i386/IO-APIC.txt>,
  706. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  707. <http://www.linuxdoc.org/docs.html#howto>.
  708. If you don't know what to do here, say N.
  709. config HAVE_ARM_SCU
  710. bool
  711. depends on SMP
  712. help
  713. This option enables support for the ARM system coherency unit
  714. config HAVE_ARM_TWD
  715. bool
  716. depends on SMP
  717. help
  718. This options enables support for the ARM timer and watchdog unit
  719. choice
  720. prompt "Memory split"
  721. default VMSPLIT_3G
  722. help
  723. Select the desired split between kernel and user memory.
  724. If you are not absolutely sure what you are doing, leave this
  725. option alone!
  726. config VMSPLIT_3G
  727. bool "3G/1G user/kernel split"
  728. config VMSPLIT_2G
  729. bool "2G/2G user/kernel split"
  730. config VMSPLIT_1G
  731. bool "1G/3G user/kernel split"
  732. endchoice
  733. config PAGE_OFFSET
  734. hex
  735. default 0x40000000 if VMSPLIT_1G
  736. default 0x80000000 if VMSPLIT_2G
  737. default 0xC0000000
  738. config NR_CPUS
  739. int "Maximum number of CPUs (2-32)"
  740. range 2 32
  741. depends on SMP
  742. default "4"
  743. config HOTPLUG_CPU
  744. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  745. depends on SMP && HOTPLUG && EXPERIMENTAL
  746. help
  747. Say Y here to experiment with turning CPUs off and on. CPUs
  748. can be controlled through /sys/devices/system/cpu.
  749. config LOCAL_TIMERS
  750. bool "Use local timer interrupts"
  751. depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || REALVIEW_EB_A9MP || ARCH_OMAP4)
  752. default y
  753. select HAVE_ARM_TWD if (ARCH_REALVIEW || ARCH_OMAP4)
  754. help
  755. Enable support for local timers on SMP platforms, rather then the
  756. legacy IPI broadcast method. Local timers allows the system
  757. accounting to be spread across the timer interval, preventing a
  758. "thundering herd" at every timer tick.
  759. config PREEMPT
  760. bool "Preemptible Kernel (EXPERIMENTAL)"
  761. depends on EXPERIMENTAL
  762. help
  763. This option reduces the latency of the kernel when reacting to
  764. real-time or interactive events by allowing a low priority process to
  765. be preempted even if it is in kernel mode executing a system call.
  766. This allows applications to run more reliably even when the system is
  767. under load.
  768. Say Y here if you are building a kernel for a desktop, embedded
  769. or real-time system. Say N if you are unsure.
  770. config HZ
  771. int
  772. default 128 if ARCH_L7200
  773. default 200 if ARCH_EBSA110 || ARCH_S3C2410
  774. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  775. default AT91_TIMER_HZ if ARCH_AT91
  776. default 100
  777. config AEABI
  778. bool "Use the ARM EABI to compile the kernel"
  779. help
  780. This option allows for the kernel to be compiled using the latest
  781. ARM ABI (aka EABI). This is only useful if you are using a user
  782. space environment that is also compiled with EABI.
  783. Since there are major incompatibilities between the legacy ABI and
  784. EABI, especially with regard to structure member alignment, this
  785. option also changes the kernel syscall calling convention to
  786. disambiguate both ABIs and allow for backward compatibility support
  787. (selected with CONFIG_OABI_COMPAT).
  788. To use this you need GCC version 4.0.0 or later.
  789. config OABI_COMPAT
  790. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  791. depends on AEABI && EXPERIMENTAL
  792. default y
  793. help
  794. This option preserves the old syscall interface along with the
  795. new (ARM EABI) one. It also provides a compatibility layer to
  796. intercept syscalls that have structure arguments which layout
  797. in memory differs between the legacy ABI and the new ARM EABI
  798. (only for non "thumb" binaries). This option adds a tiny
  799. overhead to all syscalls and produces a slightly larger kernel.
  800. If you know you'll be using only pure EABI user space then you
  801. can say N here. If this option is not selected and you attempt
  802. to execute a legacy ABI binary then the result will be
  803. UNPREDICTABLE (in fact it can be predicted that it won't work
  804. at all). If in doubt say Y.
  805. config ARCH_HAS_HOLES_MEMORYMODEL
  806. bool
  807. # Discontigmem is deprecated
  808. config ARCH_DISCONTIGMEM_ENABLE
  809. bool
  810. config ARCH_SPARSEMEM_ENABLE
  811. bool
  812. config ARCH_SPARSEMEM_DEFAULT
  813. def_bool ARCH_SPARSEMEM_ENABLE
  814. config ARCH_SELECT_MEMORY_MODEL
  815. def_bool ARCH_DISCONTIGMEM_ENABLE && ARCH_SPARSEMEM_ENABLE
  816. config NODES_SHIFT
  817. int
  818. default "4" if ARCH_LH7A40X
  819. default "2"
  820. depends on NEED_MULTIPLE_NODES
  821. config HIGHMEM
  822. bool "High Memory Support (EXPERIMENTAL)"
  823. depends on MMU && EXPERIMENTAL
  824. help
  825. The address space of ARM processors is only 4 Gigabytes large
  826. and it has to accommodate user address space, kernel address
  827. space as well as some memory mapped IO. That means that, if you
  828. have a large amount of physical memory and/or IO, not all of the
  829. memory can be "permanently mapped" by the kernel. The physical
  830. memory that is not permanently mapped is called "high memory".
  831. Depending on the selected kernel/user memory split, minimum
  832. vmalloc space and actual amount of RAM, you may not need this
  833. option which should result in a slightly faster kernel.
  834. If unsure, say n.
  835. source "mm/Kconfig"
  836. config LEDS
  837. bool "Timer and CPU usage LEDs"
  838. depends on ARCH_CDB89712 || ARCH_EBSA110 || \
  839. ARCH_EBSA285 || ARCH_INTEGRATOR || \
  840. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  841. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  842. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  843. ARCH_AT91 || ARCH_DAVINCI || \
  844. ARCH_KS8695 || MACH_RD88F5182
  845. help
  846. If you say Y here, the LEDs on your machine will be used
  847. to provide useful information about your current system status.
  848. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  849. be able to select which LEDs are active using the options below. If
  850. you are compiling a kernel for the EBSA-110 or the LART however, the
  851. red LED will simply flash regularly to indicate that the system is
  852. still functional. It is safe to say Y here if you have a CATS
  853. system, but the driver will do nothing.
  854. config LEDS_TIMER
  855. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  856. OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  857. || MACH_OMAP_PERSEUS2
  858. depends on LEDS
  859. depends on !GENERIC_CLOCKEVENTS
  860. default y if ARCH_EBSA110
  861. help
  862. If you say Y here, one of the system LEDs (the green one on the
  863. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  864. will flash regularly to indicate that the system is still
  865. operational. This is mainly useful to kernel hackers who are
  866. debugging unstable kernels.
  867. The LART uses the same LED for both Timer LED and CPU usage LED
  868. functions. You may choose to use both, but the Timer LED function
  869. will overrule the CPU usage LED.
  870. config LEDS_CPU
  871. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  872. !ARCH_OMAP) \
  873. || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  874. || MACH_OMAP_PERSEUS2
  875. depends on LEDS
  876. help
  877. If you say Y here, the red LED will be used to give a good real
  878. time indication of CPU usage, by lighting whenever the idle task
  879. is not currently executing.
  880. The LART uses the same LED for both Timer LED and CPU usage LED
  881. functions. You may choose to use both, but the Timer LED function
  882. will overrule the CPU usage LED.
  883. config ALIGNMENT_TRAP
  884. bool
  885. depends on CPU_CP15_MMU
  886. default y if !ARCH_EBSA110
  887. help
  888. ARM processors cannot fetch/store information which is not
  889. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  890. address divisible by 4. On 32-bit ARM processors, these non-aligned
  891. fetch/store instructions will be emulated in software if you say
  892. here, which has a severe performance impact. This is necessary for
  893. correct operation of some network protocols. With an IP-only
  894. configuration it is safe to say N, otherwise say Y.
  895. endmenu
  896. menu "Boot options"
  897. # Compressed boot loader in ROM. Yes, we really want to ask about
  898. # TEXT and BSS so we preserve their values in the config files.
  899. config ZBOOT_ROM_TEXT
  900. hex "Compressed ROM boot loader base address"
  901. default "0"
  902. help
  903. The physical address at which the ROM-able zImage is to be
  904. placed in the target. Platforms which normally make use of
  905. ROM-able zImage formats normally set this to a suitable
  906. value in their defconfig file.
  907. If ZBOOT_ROM is not enabled, this has no effect.
  908. config ZBOOT_ROM_BSS
  909. hex "Compressed ROM boot loader BSS address"
  910. default "0"
  911. help
  912. The base address of an area of read/write memory in the target
  913. for the ROM-able zImage which must be available while the
  914. decompressor is running. It must be large enough to hold the
  915. entire decompressed kernel plus an additional 128 KiB.
  916. Platforms which normally make use of ROM-able zImage formats
  917. normally set this to a suitable value in their defconfig file.
  918. If ZBOOT_ROM is not enabled, this has no effect.
  919. config ZBOOT_ROM
  920. bool "Compressed boot loader in ROM/flash"
  921. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  922. help
  923. Say Y here if you intend to execute your compressed kernel image
  924. (zImage) directly from ROM or flash. If unsure, say N.
  925. config CMDLINE
  926. string "Default kernel command string"
  927. default ""
  928. help
  929. On some architectures (EBSA110 and CATS), there is currently no way
  930. for the boot loader to pass arguments to the kernel. For these
  931. architectures, you should supply some command-line options at build
  932. time by entering them here. As a minimum, you should specify the
  933. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  934. config XIP_KERNEL
  935. bool "Kernel Execute-In-Place from ROM"
  936. depends on !ZBOOT_ROM
  937. help
  938. Execute-In-Place allows the kernel to run from non-volatile storage
  939. directly addressable by the CPU, such as NOR flash. This saves RAM
  940. space since the text section of the kernel is not loaded from flash
  941. to RAM. Read-write sections, such as the data section and stack,
  942. are still copied to RAM. The XIP kernel is not compressed since
  943. it has to run directly from flash, so it will take more space to
  944. store it. The flash address used to link the kernel object files,
  945. and for storing it, is configuration dependent. Therefore, if you
  946. say Y here, you must know the proper physical address where to
  947. store the kernel image depending on your own flash memory usage.
  948. Also note that the make target becomes "make xipImage" rather than
  949. "make zImage" or "make Image". The final kernel binary to put in
  950. ROM memory will be arch/arm/boot/xipImage.
  951. If unsure, say N.
  952. config XIP_PHYS_ADDR
  953. hex "XIP Kernel Physical Location"
  954. depends on XIP_KERNEL
  955. default "0x00080000"
  956. help
  957. This is the physical address in your flash memory the kernel will
  958. be linked for and stored to. This address is dependent on your
  959. own flash usage.
  960. config KEXEC
  961. bool "Kexec system call (EXPERIMENTAL)"
  962. depends on EXPERIMENTAL
  963. help
  964. kexec is a system call that implements the ability to shutdown your
  965. current kernel, and to start another kernel. It is like a reboot
  966. but it is independent of the system firmware. And like a reboot
  967. you can start any kernel with it, not just Linux.
  968. It is an ongoing process to be certain the hardware in a machine
  969. is properly shutdown, so do not be surprised if this code does not
  970. initially work for you. It may help to enable device hotplugging
  971. support.
  972. config ATAGS_PROC
  973. bool "Export atags in procfs"
  974. depends on KEXEC
  975. default y
  976. help
  977. Should the atags used to boot the kernel be exported in an "atags"
  978. file in procfs. Useful with kexec.
  979. endmenu
  980. menu "CPU Power Management"
  981. if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_PXA)
  982. source "drivers/cpufreq/Kconfig"
  983. config CPU_FREQ_SA1100
  984. bool
  985. depends on CPU_FREQ && (SA1100_H3100 || SA1100_H3600 || SA1100_LART || SA1100_PLEB || SA1100_BADGE4 || SA1100_HACKKIT)
  986. default y
  987. config CPU_FREQ_SA1110
  988. bool
  989. depends on CPU_FREQ && (SA1100_ASSABET || SA1100_CERF || SA1100_PT_SYSTEM3)
  990. default y
  991. config CPU_FREQ_INTEGRATOR
  992. tristate "CPUfreq driver for ARM Integrator CPUs"
  993. depends on ARCH_INTEGRATOR && CPU_FREQ
  994. default y
  995. help
  996. This enables the CPUfreq driver for ARM Integrator CPUs.
  997. For details, take a look at <file:Documentation/cpu-freq>.
  998. If in doubt, say Y.
  999. config CPU_FREQ_PXA
  1000. bool
  1001. depends on CPU_FREQ && ARCH_PXA && PXA25x
  1002. default y
  1003. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  1004. endif
  1005. source "drivers/cpuidle/Kconfig"
  1006. endmenu
  1007. menu "Floating point emulation"
  1008. comment "At least one emulation must be selected"
  1009. config FPE_NWFPE
  1010. bool "NWFPE math emulation"
  1011. depends on !AEABI || OABI_COMPAT
  1012. ---help---
  1013. Say Y to include the NWFPE floating point emulator in the kernel.
  1014. This is necessary to run most binaries. Linux does not currently
  1015. support floating point hardware so you need to say Y here even if
  1016. your machine has an FPA or floating point co-processor podule.
  1017. You may say N here if you are going to load the Acorn FPEmulator
  1018. early in the bootup.
  1019. config FPE_NWFPE_XP
  1020. bool "Support extended precision"
  1021. depends on FPE_NWFPE
  1022. help
  1023. Say Y to include 80-bit support in the kernel floating-point
  1024. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  1025. Note that gcc does not generate 80-bit operations by default,
  1026. so in most cases this option only enlarges the size of the
  1027. floating point emulator without any good reason.
  1028. You almost surely want to say N here.
  1029. config FPE_FASTFPE
  1030. bool "FastFPE math emulation (EXPERIMENTAL)"
  1031. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  1032. ---help---
  1033. Say Y here to include the FAST floating point emulator in the kernel.
  1034. This is an experimental much faster emulator which now also has full
  1035. precision for the mantissa. It does not support any exceptions.
  1036. It is very simple, and approximately 3-6 times faster than NWFPE.
  1037. It should be sufficient for most programs. It may be not suitable
  1038. for scientific calculations, but you have to check this for yourself.
  1039. If you do not feel you need a faster FP emulation you should better
  1040. choose NWFPE.
  1041. config VFP
  1042. bool "VFP-format floating point maths"
  1043. depends on CPU_V6 || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  1044. help
  1045. Say Y to include VFP support code in the kernel. This is needed
  1046. if your hardware includes a VFP unit.
  1047. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  1048. release notes and additional status information.
  1049. Say N if your target does not have VFP hardware.
  1050. config VFPv3
  1051. bool
  1052. depends on VFP
  1053. default y if CPU_V7
  1054. config NEON
  1055. bool "Advanced SIMD (NEON) Extension support"
  1056. depends on VFPv3 && CPU_V7
  1057. help
  1058. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  1059. Extension.
  1060. endmenu
  1061. menu "Userspace binary formats"
  1062. source "fs/Kconfig.binfmt"
  1063. config ARTHUR
  1064. tristate "RISC OS personality"
  1065. depends on !AEABI
  1066. help
  1067. Say Y here to include the kernel code necessary if you want to run
  1068. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  1069. experimental; if this sounds frightening, say N and sleep in peace.
  1070. You can also say M here to compile this support as a module (which
  1071. will be called arthur).
  1072. endmenu
  1073. menu "Power management options"
  1074. source "kernel/power/Kconfig"
  1075. config ARCH_SUSPEND_POSSIBLE
  1076. def_bool y
  1077. endmenu
  1078. source "net/Kconfig"
  1079. menu "Device Drivers"
  1080. source "drivers/base/Kconfig"
  1081. source "drivers/connector/Kconfig"
  1082. if ALIGNMENT_TRAP || !CPU_CP15_MMU
  1083. source "drivers/mtd/Kconfig"
  1084. endif
  1085. source "drivers/parport/Kconfig"
  1086. source "drivers/pnp/Kconfig"
  1087. source "drivers/block/Kconfig"
  1088. # misc before ide - BLK_DEV_SGIIOC4 depends on SGI_IOC4
  1089. source "drivers/misc/Kconfig"
  1090. source "drivers/ide/Kconfig"
  1091. source "drivers/scsi/Kconfig"
  1092. source "drivers/ata/Kconfig"
  1093. source "drivers/md/Kconfig"
  1094. source "drivers/message/fusion/Kconfig"
  1095. source "drivers/ieee1394/Kconfig"
  1096. source "drivers/message/i2o/Kconfig"
  1097. source "drivers/net/Kconfig"
  1098. source "drivers/isdn/Kconfig"
  1099. # input before char - char/joystick depends on it. As does USB.
  1100. source "drivers/input/Kconfig"
  1101. source "drivers/char/Kconfig"
  1102. source "drivers/i2c/Kconfig"
  1103. source "drivers/spi/Kconfig"
  1104. source "drivers/gpio/Kconfig"
  1105. source "drivers/w1/Kconfig"
  1106. source "drivers/power/Kconfig"
  1107. source "drivers/hwmon/Kconfig"
  1108. source "drivers/thermal/Kconfig"
  1109. source "drivers/watchdog/Kconfig"
  1110. source "drivers/ssb/Kconfig"
  1111. #source "drivers/l3/Kconfig"
  1112. source "drivers/mfd/Kconfig"
  1113. source "drivers/media/Kconfig"
  1114. source "drivers/video/Kconfig"
  1115. source "sound/Kconfig"
  1116. source "drivers/hid/Kconfig"
  1117. source "drivers/usb/Kconfig"
  1118. source "drivers/uwb/Kconfig"
  1119. source "drivers/mmc/Kconfig"
  1120. source "drivers/memstick/Kconfig"
  1121. source "drivers/accessibility/Kconfig"
  1122. source "drivers/leds/Kconfig"
  1123. source "drivers/rtc/Kconfig"
  1124. source "drivers/dma/Kconfig"
  1125. source "drivers/dca/Kconfig"
  1126. source "drivers/auxdisplay/Kconfig"
  1127. source "drivers/regulator/Kconfig"
  1128. source "drivers/uio/Kconfig"
  1129. source "drivers/staging/Kconfig"
  1130. endmenu
  1131. source "fs/Kconfig"
  1132. source "arch/arm/Kconfig.debug"
  1133. source "security/Kconfig"
  1134. source "crypto/Kconfig"
  1135. source "lib/Kconfig"