Kconfig 57 KB

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  1. config ARM
  2. bool
  3. default y
  4. select HAVE_AOUT
  5. select HAVE_DMA_API_DEBUG
  6. select HAVE_IDE
  7. select HAVE_MEMBLOCK
  8. select RTC_LIB
  9. select SYS_SUPPORTS_APM_EMULATION
  10. select GENERIC_ATOMIC64 if (CPU_V6 || !CPU_32v6K || !AEABI)
  11. select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
  12. select HAVE_ARCH_KGDB
  13. select HAVE_KPROBES if (!XIP_KERNEL && !THUMB2_KERNEL)
  14. select HAVE_KRETPROBES if (HAVE_KPROBES)
  15. select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
  16. select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
  17. select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL)
  18. select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL)
  19. select HAVE_GENERIC_DMA_COHERENT
  20. select HAVE_KERNEL_GZIP
  21. select HAVE_KERNEL_LZO
  22. select HAVE_KERNEL_LZMA
  23. select HAVE_IRQ_WORK
  24. select HAVE_PERF_EVENTS
  25. select PERF_USE_VMALLOC
  26. select HAVE_REGS_AND_STACK_ACCESS_API
  27. select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7))
  28. select HAVE_C_RECORDMCOUNT
  29. select HAVE_GENERIC_HARDIRQS
  30. select HAVE_SPARSE_IRQ
  31. help
  32. The ARM series is a line of low-power-consumption RISC chip designs
  33. licensed by ARM Ltd and targeted at embedded applications and
  34. handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
  35. manufactured, but legacy ARM-based PC hardware remains popular in
  36. Europe. There is an ARM Linux project with a web page at
  37. <http://www.arm.linux.org.uk/>.
  38. config HAVE_PWM
  39. bool
  40. config MIGHT_HAVE_PCI
  41. bool
  42. config SYS_SUPPORTS_APM_EMULATION
  43. bool
  44. config HAVE_SCHED_CLOCK
  45. bool
  46. config GENERIC_GPIO
  47. bool
  48. config ARCH_USES_GETTIMEOFFSET
  49. bool
  50. default n
  51. config GENERIC_CLOCKEVENTS
  52. bool
  53. config GENERIC_CLOCKEVENTS_BROADCAST
  54. bool
  55. depends on GENERIC_CLOCKEVENTS
  56. default y if SMP
  57. config KTIME_SCALAR
  58. bool
  59. default y
  60. config HAVE_TCM
  61. bool
  62. select GENERIC_ALLOCATOR
  63. config HAVE_PROC_CPU
  64. bool
  65. config NO_IOPORT
  66. bool
  67. config EISA
  68. bool
  69. ---help---
  70. The Extended Industry Standard Architecture (EISA) bus was
  71. developed as an open alternative to the IBM MicroChannel bus.
  72. The EISA bus provided some of the features of the IBM MicroChannel
  73. bus while maintaining backward compatibility with cards made for
  74. the older ISA bus. The EISA bus saw limited use between 1988 and
  75. 1995 when it was made obsolete by the PCI bus.
  76. Say Y here if you are building a kernel for an EISA-based machine.
  77. Otherwise, say N.
  78. config SBUS
  79. bool
  80. config MCA
  81. bool
  82. help
  83. MicroChannel Architecture is found in some IBM PS/2 machines and
  84. laptops. It is a bus system similar to PCI or ISA. See
  85. <file:Documentation/mca.txt> (and especially the web page given
  86. there) before attempting to build an MCA bus kernel.
  87. config STACKTRACE_SUPPORT
  88. bool
  89. default y
  90. config HAVE_LATENCYTOP_SUPPORT
  91. bool
  92. depends on !SMP
  93. default y
  94. config LOCKDEP_SUPPORT
  95. bool
  96. default y
  97. config TRACE_IRQFLAGS_SUPPORT
  98. bool
  99. default y
  100. config HARDIRQS_SW_RESEND
  101. bool
  102. default y
  103. config GENERIC_IRQ_PROBE
  104. bool
  105. default y
  106. config GENERIC_LOCKBREAK
  107. bool
  108. default y
  109. depends on SMP && PREEMPT
  110. config RWSEM_GENERIC_SPINLOCK
  111. bool
  112. default y
  113. config RWSEM_XCHGADD_ALGORITHM
  114. bool
  115. config ARCH_HAS_ILOG2_U32
  116. bool
  117. config ARCH_HAS_ILOG2_U64
  118. bool
  119. config ARCH_HAS_CPUFREQ
  120. bool
  121. help
  122. Internal node to signify that the ARCH has CPUFREQ support
  123. and that the relevant menu configurations are displayed for
  124. it.
  125. config ARCH_HAS_CPU_IDLE_WAIT
  126. def_bool y
  127. config GENERIC_HWEIGHT
  128. bool
  129. default y
  130. config GENERIC_CALIBRATE_DELAY
  131. bool
  132. default y
  133. config ARCH_MAY_HAVE_PC_FDC
  134. bool
  135. config ZONE_DMA
  136. bool
  137. config NEED_DMA_MAP_STATE
  138. def_bool y
  139. config GENERIC_ISA_DMA
  140. bool
  141. config FIQ
  142. bool
  143. config ARCH_MTD_XIP
  144. bool
  145. config VECTORS_BASE
  146. hex
  147. default 0xffff0000 if MMU || CPU_HIGH_VECTOR
  148. default DRAM_BASE if REMAP_VECTORS_TO_RAM
  149. default 0x00000000
  150. help
  151. The base address of exception vectors.
  152. config ARM_PATCH_PHYS_VIRT
  153. bool "Patch physical to virtual translations at runtime (EXPERIMENTAL)"
  154. depends on EXPERIMENTAL
  155. depends on !XIP_KERNEL && MMU
  156. depends on !ARCH_REALVIEW || !SPARSEMEM
  157. help
  158. Patch phys-to-virt translation functions at runtime according to
  159. the position of the kernel in system memory.
  160. This can only be used with non-XIP with MMU kernels where
  161. the base of physical memory is at a 16MB boundary.
  162. config ARM_PATCH_PHYS_VIRT_16BIT
  163. def_bool y
  164. depends on ARM_PATCH_PHYS_VIRT && ARCH_MSM
  165. source "init/Kconfig"
  166. source "kernel/Kconfig.freezer"
  167. menu "System Type"
  168. config MMU
  169. bool "MMU-based Paged Memory Management Support"
  170. default y
  171. help
  172. Select if you want MMU-based virtualised addressing space
  173. support by paged memory management. If unsure, say 'Y'.
  174. #
  175. # The "ARM system type" choice list is ordered alphabetically by option
  176. # text. Please add new entries in the option alphabetic order.
  177. #
  178. choice
  179. prompt "ARM system type"
  180. default ARCH_VERSATILE
  181. config ARCH_INTEGRATOR
  182. bool "ARM Ltd. Integrator family"
  183. select ARM_AMBA
  184. select ARCH_HAS_CPUFREQ
  185. select CLKDEV_LOOKUP
  186. select ICST
  187. select GENERIC_CLOCKEVENTS
  188. select PLAT_VERSATILE
  189. help
  190. Support for ARM's Integrator platform.
  191. config ARCH_REALVIEW
  192. bool "ARM Ltd. RealView family"
  193. select ARM_AMBA
  194. select CLKDEV_LOOKUP
  195. select HAVE_SCHED_CLOCK
  196. select ICST
  197. select GENERIC_CLOCKEVENTS
  198. select ARCH_WANT_OPTIONAL_GPIOLIB
  199. select PLAT_VERSATILE
  200. select ARM_TIMER_SP804
  201. select GPIO_PL061 if GPIOLIB
  202. help
  203. This enables support for ARM Ltd RealView boards.
  204. config ARCH_VERSATILE
  205. bool "ARM Ltd. Versatile family"
  206. select ARM_AMBA
  207. select ARM_VIC
  208. select CLKDEV_LOOKUP
  209. select HAVE_SCHED_CLOCK
  210. select ICST
  211. select GENERIC_CLOCKEVENTS
  212. select ARCH_WANT_OPTIONAL_GPIOLIB
  213. select PLAT_VERSATILE
  214. select ARM_TIMER_SP804
  215. help
  216. This enables support for ARM Ltd Versatile board.
  217. config ARCH_VEXPRESS
  218. bool "ARM Ltd. Versatile Express family"
  219. select ARCH_WANT_OPTIONAL_GPIOLIB
  220. select ARM_AMBA
  221. select ARM_TIMER_SP804
  222. select CLKDEV_LOOKUP
  223. select GENERIC_CLOCKEVENTS
  224. select HAVE_CLK
  225. select HAVE_SCHED_CLOCK
  226. select ICST
  227. select PLAT_VERSATILE
  228. help
  229. This enables support for the ARM Ltd Versatile Express boards.
  230. config ARCH_AT91
  231. bool "Atmel AT91"
  232. select ARCH_REQUIRE_GPIOLIB
  233. select HAVE_CLK
  234. help
  235. This enables support for systems based on the Atmel AT91RM9200,
  236. AT91SAM9 and AT91CAP9 processors.
  237. config ARCH_BCMRING
  238. bool "Broadcom BCMRING"
  239. depends on MMU
  240. select CPU_V6
  241. select ARM_AMBA
  242. select CLKDEV_LOOKUP
  243. select GENERIC_CLOCKEVENTS
  244. select ARCH_WANT_OPTIONAL_GPIOLIB
  245. help
  246. Support for Broadcom's BCMRing platform.
  247. config ARCH_CLPS711X
  248. bool "Cirrus Logic CLPS711x/EP721x-based"
  249. select CPU_ARM720T
  250. select ARCH_USES_GETTIMEOFFSET
  251. help
  252. Support for Cirrus Logic 711x/721x based boards.
  253. config ARCH_CNS3XXX
  254. bool "Cavium Networks CNS3XXX family"
  255. select CPU_V6
  256. select GENERIC_CLOCKEVENTS
  257. select ARM_GIC
  258. select MIGHT_HAVE_PCI
  259. select PCI_DOMAINS if PCI
  260. help
  261. Support for Cavium Networks CNS3XXX platform.
  262. config ARCH_GEMINI
  263. bool "Cortina Systems Gemini"
  264. select CPU_FA526
  265. select ARCH_REQUIRE_GPIOLIB
  266. select ARCH_USES_GETTIMEOFFSET
  267. help
  268. Support for the Cortina Systems Gemini family SoCs
  269. config ARCH_EBSA110
  270. bool "EBSA-110"
  271. select CPU_SA110
  272. select ISA
  273. select NO_IOPORT
  274. select ARCH_USES_GETTIMEOFFSET
  275. help
  276. This is an evaluation board for the StrongARM processor available
  277. from Digital. It has limited hardware on-board, including an
  278. Ethernet interface, two PCMCIA sockets, two serial ports and a
  279. parallel port.
  280. config ARCH_EP93XX
  281. bool "EP93xx-based"
  282. select CPU_ARM920T
  283. select ARM_AMBA
  284. select ARM_VIC
  285. select CLKDEV_LOOKUP
  286. select ARCH_REQUIRE_GPIOLIB
  287. select ARCH_HAS_HOLES_MEMORYMODEL
  288. select ARCH_USES_GETTIMEOFFSET
  289. help
  290. This enables support for the Cirrus EP93xx series of CPUs.
  291. config ARCH_FOOTBRIDGE
  292. bool "FootBridge"
  293. select CPU_SA110
  294. select FOOTBRIDGE
  295. select GENERIC_CLOCKEVENTS
  296. help
  297. Support for systems based on the DC21285 companion chip
  298. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  299. config ARCH_MXC
  300. bool "Freescale MXC/iMX-based"
  301. select GENERIC_CLOCKEVENTS
  302. select ARCH_REQUIRE_GPIOLIB
  303. select CLKDEV_LOOKUP
  304. select HAVE_SCHED_CLOCK
  305. help
  306. Support for Freescale MXC/iMX-based family of processors
  307. config ARCH_MXS
  308. bool "Freescale MXS-based"
  309. select GENERIC_CLOCKEVENTS
  310. select ARCH_REQUIRE_GPIOLIB
  311. select CLKDEV_LOOKUP
  312. help
  313. Support for Freescale MXS-based family of processors
  314. config ARCH_STMP3XXX
  315. bool "Freescale STMP3xxx"
  316. select CPU_ARM926T
  317. select CLKDEV_LOOKUP
  318. select ARCH_REQUIRE_GPIOLIB
  319. select GENERIC_CLOCKEVENTS
  320. select USB_ARCH_HAS_EHCI
  321. help
  322. Support for systems based on the Freescale 3xxx CPUs.
  323. config ARCH_NETX
  324. bool "Hilscher NetX based"
  325. select CPU_ARM926T
  326. select ARM_VIC
  327. select GENERIC_CLOCKEVENTS
  328. help
  329. This enables support for systems based on the Hilscher NetX Soc
  330. config ARCH_H720X
  331. bool "Hynix HMS720x-based"
  332. select CPU_ARM720T
  333. select ISA_DMA_API
  334. select ARCH_USES_GETTIMEOFFSET
  335. help
  336. This enables support for systems based on the Hynix HMS720x
  337. config ARCH_IOP13XX
  338. bool "IOP13xx-based"
  339. depends on MMU
  340. select CPU_XSC3
  341. select PLAT_IOP
  342. select PCI
  343. select ARCH_SUPPORTS_MSI
  344. select VMSPLIT_1G
  345. help
  346. Support for Intel's IOP13XX (XScale) family of processors.
  347. config ARCH_IOP32X
  348. bool "IOP32x-based"
  349. depends on MMU
  350. select CPU_XSCALE
  351. select PLAT_IOP
  352. select PCI
  353. select ARCH_REQUIRE_GPIOLIB
  354. help
  355. Support for Intel's 80219 and IOP32X (XScale) family of
  356. processors.
  357. config ARCH_IOP33X
  358. bool "IOP33x-based"
  359. depends on MMU
  360. select CPU_XSCALE
  361. select PLAT_IOP
  362. select PCI
  363. select ARCH_REQUIRE_GPIOLIB
  364. help
  365. Support for Intel's IOP33X (XScale) family of processors.
  366. config ARCH_IXP23XX
  367. bool "IXP23XX-based"
  368. depends on MMU
  369. select CPU_XSC3
  370. select PCI
  371. select ARCH_USES_GETTIMEOFFSET
  372. help
  373. Support for Intel's IXP23xx (XScale) family of processors.
  374. config ARCH_IXP2000
  375. bool "IXP2400/2800-based"
  376. depends on MMU
  377. select CPU_XSCALE
  378. select PCI
  379. select ARCH_USES_GETTIMEOFFSET
  380. help
  381. Support for Intel's IXP2400/2800 (XScale) family of processors.
  382. config ARCH_IXP4XX
  383. bool "IXP4xx-based"
  384. depends on MMU
  385. select CPU_XSCALE
  386. select GENERIC_GPIO
  387. select GENERIC_CLOCKEVENTS
  388. select HAVE_SCHED_CLOCK
  389. select MIGHT_HAVE_PCI
  390. select DMABOUNCE if PCI
  391. help
  392. Support for Intel's IXP4XX (XScale) family of processors.
  393. config ARCH_DOVE
  394. bool "Marvell Dove"
  395. select CPU_V6K
  396. select PCI
  397. select ARCH_REQUIRE_GPIOLIB
  398. select GENERIC_CLOCKEVENTS
  399. select PLAT_ORION
  400. help
  401. Support for the Marvell Dove SoC 88AP510
  402. config ARCH_KIRKWOOD
  403. bool "Marvell Kirkwood"
  404. select CPU_FEROCEON
  405. select PCI
  406. select ARCH_REQUIRE_GPIOLIB
  407. select GENERIC_CLOCKEVENTS
  408. select PLAT_ORION
  409. help
  410. Support for the following Marvell Kirkwood series SoCs:
  411. 88F6180, 88F6192 and 88F6281.
  412. config ARCH_LOKI
  413. bool "Marvell Loki (88RC8480)"
  414. select CPU_FEROCEON
  415. select GENERIC_CLOCKEVENTS
  416. select PLAT_ORION
  417. help
  418. Support for the Marvell Loki (88RC8480) SoC.
  419. config ARCH_LPC32XX
  420. bool "NXP LPC32XX"
  421. select CPU_ARM926T
  422. select ARCH_REQUIRE_GPIOLIB
  423. select HAVE_IDE
  424. select ARM_AMBA
  425. select USB_ARCH_HAS_OHCI
  426. select CLKDEV_LOOKUP
  427. select GENERIC_TIME
  428. select GENERIC_CLOCKEVENTS
  429. help
  430. Support for the NXP LPC32XX family of processors
  431. config ARCH_MV78XX0
  432. bool "Marvell MV78xx0"
  433. select CPU_FEROCEON
  434. select PCI
  435. select ARCH_REQUIRE_GPIOLIB
  436. select GENERIC_CLOCKEVENTS
  437. select PLAT_ORION
  438. help
  439. Support for the following Marvell MV78xx0 series SoCs:
  440. MV781x0, MV782x0.
  441. config ARCH_ORION5X
  442. bool "Marvell Orion"
  443. depends on MMU
  444. select CPU_FEROCEON
  445. select PCI
  446. select ARCH_REQUIRE_GPIOLIB
  447. select GENERIC_CLOCKEVENTS
  448. select PLAT_ORION
  449. help
  450. Support for the following Marvell Orion 5x series SoCs:
  451. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  452. Orion-2 (5281), Orion-1-90 (6183).
  453. config ARCH_MMP
  454. bool "Marvell PXA168/910/MMP2"
  455. depends on MMU
  456. select ARCH_REQUIRE_GPIOLIB
  457. select CLKDEV_LOOKUP
  458. select GENERIC_CLOCKEVENTS
  459. select HAVE_SCHED_CLOCK
  460. select TICK_ONESHOT
  461. select PLAT_PXA
  462. select SPARSE_IRQ
  463. help
  464. Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
  465. config ARCH_KS8695
  466. bool "Micrel/Kendin KS8695"
  467. select CPU_ARM922T
  468. select ARCH_REQUIRE_GPIOLIB
  469. select ARCH_USES_GETTIMEOFFSET
  470. help
  471. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  472. System-on-Chip devices.
  473. config ARCH_NS9XXX
  474. bool "NetSilicon NS9xxx"
  475. select CPU_ARM926T
  476. select GENERIC_GPIO
  477. select GENERIC_CLOCKEVENTS
  478. select HAVE_CLK
  479. help
  480. Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
  481. System.
  482. <http://www.digi.com/products/microprocessors/index.jsp>
  483. config ARCH_W90X900
  484. bool "Nuvoton W90X900 CPU"
  485. select CPU_ARM926T
  486. select ARCH_REQUIRE_GPIOLIB
  487. select CLKDEV_LOOKUP
  488. select GENERIC_CLOCKEVENTS
  489. help
  490. Support for Nuvoton (Winbond logic dept.) ARM9 processor,
  491. At present, the w90x900 has been renamed nuc900, regarding
  492. the ARM series product line, you can login the following
  493. link address to know more.
  494. <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
  495. ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
  496. config ARCH_NUC93X
  497. bool "Nuvoton NUC93X CPU"
  498. select CPU_ARM926T
  499. select CLKDEV_LOOKUP
  500. help
  501. Support for Nuvoton (Winbond logic dept.) NUC93X MCU,The NUC93X is a
  502. low-power and high performance MPEG-4/JPEG multimedia controller chip.
  503. config ARCH_TEGRA
  504. bool "NVIDIA Tegra"
  505. select CLKDEV_LOOKUP
  506. select GENERIC_TIME
  507. select GENERIC_CLOCKEVENTS
  508. select GENERIC_GPIO
  509. select HAVE_CLK
  510. select HAVE_SCHED_CLOCK
  511. select ARCH_HAS_BARRIERS if CACHE_L2X0
  512. select ARCH_HAS_CPUFREQ
  513. help
  514. This enables support for NVIDIA Tegra based systems (Tegra APX,
  515. Tegra 6xx and Tegra 2 series).
  516. config ARCH_PNX4008
  517. bool "Philips Nexperia PNX4008 Mobile"
  518. select CPU_ARM926T
  519. select CLKDEV_LOOKUP
  520. select ARCH_USES_GETTIMEOFFSET
  521. help
  522. This enables support for Philips PNX4008 mobile platform.
  523. config ARCH_PXA
  524. bool "PXA2xx/PXA3xx-based"
  525. depends on MMU
  526. select ARCH_MTD_XIP
  527. select ARCH_HAS_CPUFREQ
  528. select CLKDEV_LOOKUP
  529. select ARCH_REQUIRE_GPIOLIB
  530. select GENERIC_CLOCKEVENTS
  531. select HAVE_SCHED_CLOCK
  532. select TICK_ONESHOT
  533. select PLAT_PXA
  534. select SPARSE_IRQ
  535. help
  536. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  537. config ARCH_MSM
  538. bool "Qualcomm MSM"
  539. select HAVE_CLK
  540. select GENERIC_CLOCKEVENTS
  541. select ARCH_REQUIRE_GPIOLIB
  542. select CLKDEV_LOOKUP
  543. help
  544. Support for Qualcomm MSM/QSD based systems. This runs on the
  545. apps processor of the MSM/QSD and depends on a shared memory
  546. interface to the modem processor which runs the baseband
  547. stack and controls some vital subsystems
  548. (clock and power control, etc).
  549. config ARCH_SHMOBILE
  550. bool "Renesas SH-Mobile / R-Mobile"
  551. select HAVE_CLK
  552. select CLKDEV_LOOKUP
  553. select GENERIC_CLOCKEVENTS
  554. select NO_IOPORT
  555. select SPARSE_IRQ
  556. select MULTI_IRQ_HANDLER
  557. help
  558. Support for Renesas's SH-Mobile and R-Mobile ARM platforms.
  559. config ARCH_RPC
  560. bool "RiscPC"
  561. select ARCH_ACORN
  562. select FIQ
  563. select TIMER_ACORN
  564. select ARCH_MAY_HAVE_PC_FDC
  565. select HAVE_PATA_PLATFORM
  566. select ISA_DMA_API
  567. select NO_IOPORT
  568. select ARCH_SPARSEMEM_ENABLE
  569. select ARCH_USES_GETTIMEOFFSET
  570. help
  571. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  572. CD-ROM interface, serial and parallel port, and the floppy drive.
  573. config ARCH_SA1100
  574. bool "SA1100-based"
  575. select CPU_SA1100
  576. select ISA
  577. select ARCH_SPARSEMEM_ENABLE
  578. select ARCH_MTD_XIP
  579. select ARCH_HAS_CPUFREQ
  580. select CPU_FREQ
  581. select GENERIC_CLOCKEVENTS
  582. select HAVE_CLK
  583. select HAVE_SCHED_CLOCK
  584. select TICK_ONESHOT
  585. select ARCH_REQUIRE_GPIOLIB
  586. help
  587. Support for StrongARM 11x0 based boards.
  588. config ARCH_S3C2410
  589. bool "Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443, S3C2450"
  590. select GENERIC_GPIO
  591. select ARCH_HAS_CPUFREQ
  592. select HAVE_CLK
  593. select ARCH_USES_GETTIMEOFFSET
  594. select HAVE_S3C2410_I2C if I2C
  595. help
  596. Samsung S3C2410X CPU based systems, such as the Simtec Electronics
  597. BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
  598. the Samsung SMDK2410 development board (and derivatives).
  599. Note, the S3C2416 and the S3C2450 are so close that they even share
  600. the same SoC ID code. This means that there is no seperate machine
  601. directory (no arch/arm/mach-s3c2450) as the S3C2416 was first.
  602. config ARCH_S3C64XX
  603. bool "Samsung S3C64XX"
  604. select PLAT_SAMSUNG
  605. select CPU_V6
  606. select ARM_VIC
  607. select HAVE_CLK
  608. select NO_IOPORT
  609. select ARCH_USES_GETTIMEOFFSET
  610. select ARCH_HAS_CPUFREQ
  611. select ARCH_REQUIRE_GPIOLIB
  612. select SAMSUNG_CLKSRC
  613. select SAMSUNG_IRQ_VIC_TIMER
  614. select SAMSUNG_IRQ_UART
  615. select S3C_GPIO_TRACK
  616. select S3C_GPIO_PULL_UPDOWN
  617. select S3C_GPIO_CFG_S3C24XX
  618. select S3C_GPIO_CFG_S3C64XX
  619. select S3C_DEV_NAND
  620. select USB_ARCH_HAS_OHCI
  621. select SAMSUNG_GPIOLIB_4BIT
  622. select HAVE_S3C2410_I2C if I2C
  623. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  624. help
  625. Samsung S3C64XX series based systems
  626. config ARCH_S5P64X0
  627. bool "Samsung S5P6440 S5P6450"
  628. select CPU_V6
  629. select GENERIC_GPIO
  630. select HAVE_CLK
  631. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  632. select GENERIC_CLOCKEVENTS
  633. select HAVE_SCHED_CLOCK
  634. select HAVE_S3C2410_I2C if I2C
  635. select HAVE_S3C_RTC if RTC_CLASS
  636. help
  637. Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
  638. SMDK6450.
  639. config ARCH_S5P6442
  640. bool "Samsung S5P6442"
  641. select CPU_V6
  642. select GENERIC_GPIO
  643. select HAVE_CLK
  644. select ARCH_USES_GETTIMEOFFSET
  645. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  646. help
  647. Samsung S5P6442 CPU based systems
  648. config ARCH_S5PC100
  649. bool "Samsung S5PC100"
  650. select GENERIC_GPIO
  651. select HAVE_CLK
  652. select CPU_V7
  653. select ARM_L1_CACHE_SHIFT_6
  654. select ARCH_USES_GETTIMEOFFSET
  655. select HAVE_S3C2410_I2C if I2C
  656. select HAVE_S3C_RTC if RTC_CLASS
  657. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  658. help
  659. Samsung S5PC100 series based systems
  660. config ARCH_S5PV210
  661. bool "Samsung S5PV210/S5PC110"
  662. select CPU_V7
  663. select ARCH_SPARSEMEM_ENABLE
  664. select GENERIC_GPIO
  665. select HAVE_CLK
  666. select ARM_L1_CACHE_SHIFT_6
  667. select ARCH_HAS_CPUFREQ
  668. select GENERIC_CLOCKEVENTS
  669. select HAVE_SCHED_CLOCK
  670. select HAVE_S3C2410_I2C if I2C
  671. select HAVE_S3C_RTC if RTC_CLASS
  672. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  673. help
  674. Samsung S5PV210/S5PC110 series based systems
  675. config ARCH_EXYNOS4
  676. bool "Samsung EXYNOS4"
  677. select CPU_V7
  678. select ARCH_SPARSEMEM_ENABLE
  679. select GENERIC_GPIO
  680. select HAVE_CLK
  681. select ARCH_HAS_CPUFREQ
  682. select GENERIC_CLOCKEVENTS
  683. select HAVE_S3C_RTC if RTC_CLASS
  684. select HAVE_S3C2410_I2C if I2C
  685. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  686. help
  687. Samsung EXYNOS4 series based systems
  688. config ARCH_SHARK
  689. bool "Shark"
  690. select CPU_SA110
  691. select ISA
  692. select ISA_DMA
  693. select ZONE_DMA
  694. select PCI
  695. select ARCH_USES_GETTIMEOFFSET
  696. help
  697. Support for the StrongARM based Digital DNARD machine, also known
  698. as "Shark" (<http://www.shark-linux.de/shark.html>).
  699. config ARCH_TCC_926
  700. bool "Telechips TCC ARM926-based systems"
  701. select CPU_ARM926T
  702. select HAVE_CLK
  703. select CLKDEV_LOOKUP
  704. select GENERIC_CLOCKEVENTS
  705. help
  706. Support for Telechips TCC ARM926-based systems.
  707. config ARCH_U300
  708. bool "ST-Ericsson U300 Series"
  709. depends on MMU
  710. select CPU_ARM926T
  711. select HAVE_SCHED_CLOCK
  712. select HAVE_TCM
  713. select ARM_AMBA
  714. select ARM_VIC
  715. select GENERIC_CLOCKEVENTS
  716. select CLKDEV_LOOKUP
  717. select GENERIC_GPIO
  718. help
  719. Support for ST-Ericsson U300 series mobile platforms.
  720. config ARCH_U8500
  721. bool "ST-Ericsson U8500 Series"
  722. select CPU_V7
  723. select ARM_AMBA
  724. select GENERIC_CLOCKEVENTS
  725. select CLKDEV_LOOKUP
  726. select ARCH_REQUIRE_GPIOLIB
  727. select ARCH_HAS_CPUFREQ
  728. help
  729. Support for ST-Ericsson's Ux500 architecture
  730. config ARCH_NOMADIK
  731. bool "STMicroelectronics Nomadik"
  732. select ARM_AMBA
  733. select ARM_VIC
  734. select CPU_ARM926T
  735. select CLKDEV_LOOKUP
  736. select GENERIC_CLOCKEVENTS
  737. select ARCH_REQUIRE_GPIOLIB
  738. help
  739. Support for the Nomadik platform by ST-Ericsson
  740. config ARCH_DAVINCI
  741. bool "TI DaVinci"
  742. select GENERIC_CLOCKEVENTS
  743. select ARCH_REQUIRE_GPIOLIB
  744. select ZONE_DMA
  745. select HAVE_IDE
  746. select CLKDEV_LOOKUP
  747. select GENERIC_ALLOCATOR
  748. select ARCH_HAS_HOLES_MEMORYMODEL
  749. help
  750. Support for TI's DaVinci platform.
  751. config ARCH_OMAP
  752. bool "TI OMAP"
  753. select HAVE_CLK
  754. select ARCH_REQUIRE_GPIOLIB
  755. select ARCH_HAS_CPUFREQ
  756. select GENERIC_CLOCKEVENTS
  757. select HAVE_SCHED_CLOCK
  758. select ARCH_HAS_HOLES_MEMORYMODEL
  759. help
  760. Support for TI's OMAP platform (OMAP1/2/3/4).
  761. config PLAT_SPEAR
  762. bool "ST SPEAr"
  763. select ARM_AMBA
  764. select ARCH_REQUIRE_GPIOLIB
  765. select CLKDEV_LOOKUP
  766. select GENERIC_CLOCKEVENTS
  767. select HAVE_CLK
  768. help
  769. Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
  770. config ARCH_VT8500
  771. bool "VIA/WonderMedia 85xx"
  772. select CPU_ARM926T
  773. select GENERIC_GPIO
  774. select ARCH_HAS_CPUFREQ
  775. select GENERIC_CLOCKEVENTS
  776. select ARCH_REQUIRE_GPIOLIB
  777. select HAVE_PWM
  778. help
  779. Support for VIA/WonderMedia VT8500/WM85xx System-on-Chip.
  780. endchoice
  781. #
  782. # This is sorted alphabetically by mach-* pathname. However, plat-*
  783. # Kconfigs may be included either alphabetically (according to the
  784. # plat- suffix) or along side the corresponding mach-* source.
  785. #
  786. source "arch/arm/mach-at91/Kconfig"
  787. source "arch/arm/mach-bcmring/Kconfig"
  788. source "arch/arm/mach-clps711x/Kconfig"
  789. source "arch/arm/mach-cns3xxx/Kconfig"
  790. source "arch/arm/mach-davinci/Kconfig"
  791. source "arch/arm/mach-dove/Kconfig"
  792. source "arch/arm/mach-ep93xx/Kconfig"
  793. source "arch/arm/mach-footbridge/Kconfig"
  794. source "arch/arm/mach-gemini/Kconfig"
  795. source "arch/arm/mach-h720x/Kconfig"
  796. source "arch/arm/mach-integrator/Kconfig"
  797. source "arch/arm/mach-iop32x/Kconfig"
  798. source "arch/arm/mach-iop33x/Kconfig"
  799. source "arch/arm/mach-iop13xx/Kconfig"
  800. source "arch/arm/mach-ixp4xx/Kconfig"
  801. source "arch/arm/mach-ixp2000/Kconfig"
  802. source "arch/arm/mach-ixp23xx/Kconfig"
  803. source "arch/arm/mach-kirkwood/Kconfig"
  804. source "arch/arm/mach-ks8695/Kconfig"
  805. source "arch/arm/mach-loki/Kconfig"
  806. source "arch/arm/mach-lpc32xx/Kconfig"
  807. source "arch/arm/mach-msm/Kconfig"
  808. source "arch/arm/mach-mv78xx0/Kconfig"
  809. source "arch/arm/plat-mxc/Kconfig"
  810. source "arch/arm/mach-mxs/Kconfig"
  811. source "arch/arm/mach-netx/Kconfig"
  812. source "arch/arm/mach-nomadik/Kconfig"
  813. source "arch/arm/plat-nomadik/Kconfig"
  814. source "arch/arm/mach-ns9xxx/Kconfig"
  815. source "arch/arm/mach-nuc93x/Kconfig"
  816. source "arch/arm/plat-omap/Kconfig"
  817. source "arch/arm/mach-omap1/Kconfig"
  818. source "arch/arm/mach-omap2/Kconfig"
  819. source "arch/arm/mach-orion5x/Kconfig"
  820. source "arch/arm/mach-pxa/Kconfig"
  821. source "arch/arm/plat-pxa/Kconfig"
  822. source "arch/arm/mach-mmp/Kconfig"
  823. source "arch/arm/mach-realview/Kconfig"
  824. source "arch/arm/mach-sa1100/Kconfig"
  825. source "arch/arm/plat-samsung/Kconfig"
  826. source "arch/arm/plat-s3c24xx/Kconfig"
  827. source "arch/arm/plat-s5p/Kconfig"
  828. source "arch/arm/plat-spear/Kconfig"
  829. source "arch/arm/plat-tcc/Kconfig"
  830. if ARCH_S3C2410
  831. source "arch/arm/mach-s3c2400/Kconfig"
  832. source "arch/arm/mach-s3c2410/Kconfig"
  833. source "arch/arm/mach-s3c2412/Kconfig"
  834. source "arch/arm/mach-s3c2416/Kconfig"
  835. source "arch/arm/mach-s3c2440/Kconfig"
  836. source "arch/arm/mach-s3c2443/Kconfig"
  837. endif
  838. if ARCH_S3C64XX
  839. source "arch/arm/mach-s3c64xx/Kconfig"
  840. endif
  841. source "arch/arm/mach-s5p64x0/Kconfig"
  842. source "arch/arm/mach-s5p6442/Kconfig"
  843. source "arch/arm/mach-s5pc100/Kconfig"
  844. source "arch/arm/mach-s5pv210/Kconfig"
  845. source "arch/arm/mach-exynos4/Kconfig"
  846. source "arch/arm/mach-shmobile/Kconfig"
  847. source "arch/arm/plat-stmp3xxx/Kconfig"
  848. source "arch/arm/mach-tegra/Kconfig"
  849. source "arch/arm/mach-u300/Kconfig"
  850. source "arch/arm/mach-ux500/Kconfig"
  851. source "arch/arm/mach-versatile/Kconfig"
  852. source "arch/arm/mach-vexpress/Kconfig"
  853. source "arch/arm/mach-vt8500/Kconfig"
  854. source "arch/arm/mach-w90x900/Kconfig"
  855. # Definitions to make life easier
  856. config ARCH_ACORN
  857. bool
  858. config PLAT_IOP
  859. bool
  860. select GENERIC_CLOCKEVENTS
  861. select HAVE_SCHED_CLOCK
  862. config PLAT_ORION
  863. bool
  864. select HAVE_SCHED_CLOCK
  865. config PLAT_PXA
  866. bool
  867. config PLAT_VERSATILE
  868. bool
  869. config ARM_TIMER_SP804
  870. bool
  871. source arch/arm/mm/Kconfig
  872. config IWMMXT
  873. bool "Enable iWMMXt support"
  874. depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
  875. default y if PXA27x || PXA3xx || PXA95x || ARCH_MMP
  876. help
  877. Enable support for iWMMXt context switching at run time if
  878. running on a CPU that supports it.
  879. # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
  880. config XSCALE_PMU
  881. bool
  882. depends on CPU_XSCALE && !XSCALE_PMU_TIMER
  883. default y
  884. config CPU_HAS_PMU
  885. depends on (CPU_V6 || CPU_V6K || CPU_V7 || XSCALE_PMU) && \
  886. (!ARCH_OMAP3 || OMAP3_EMU)
  887. default y
  888. bool
  889. config MULTI_IRQ_HANDLER
  890. bool
  891. help
  892. Allow each machine to specify it's own IRQ handler at run time.
  893. if !MMU
  894. source "arch/arm/Kconfig-nommu"
  895. endif
  896. config ARM_ERRATA_411920
  897. bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
  898. depends on CPU_V6 || CPU_V6K
  899. help
  900. Invalidation of the Instruction Cache operation can
  901. fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
  902. It does not affect the MPCore. This option enables the ARM Ltd.
  903. recommended workaround.
  904. config ARM_ERRATA_430973
  905. bool "ARM errata: Stale prediction on replaced interworking branch"
  906. depends on CPU_V7
  907. help
  908. This option enables the workaround for the 430973 Cortex-A8
  909. (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
  910. interworking branch is replaced with another code sequence at the
  911. same virtual address, whether due to self-modifying code or virtual
  912. to physical address re-mapping, Cortex-A8 does not recover from the
  913. stale interworking branch prediction. This results in Cortex-A8
  914. executing the new code sequence in the incorrect ARM or Thumb state.
  915. The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
  916. and also flushes the branch target cache at every context switch.
  917. Note that setting specific bits in the ACTLR register may not be
  918. available in non-secure mode.
  919. config ARM_ERRATA_458693
  920. bool "ARM errata: Processor deadlock when a false hazard is created"
  921. depends on CPU_V7
  922. help
  923. This option enables the workaround for the 458693 Cortex-A8 (r2p0)
  924. erratum. For very specific sequences of memory operations, it is
  925. possible for a hazard condition intended for a cache line to instead
  926. be incorrectly associated with a different cache line. This false
  927. hazard might then cause a processor deadlock. The workaround enables
  928. the L1 caching of the NEON accesses and disables the PLD instruction
  929. in the ACTLR register. Note that setting specific bits in the ACTLR
  930. register may not be available in non-secure mode.
  931. config ARM_ERRATA_460075
  932. bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
  933. depends on CPU_V7
  934. help
  935. This option enables the workaround for the 460075 Cortex-A8 (r2p0)
  936. erratum. Any asynchronous access to the L2 cache may encounter a
  937. situation in which recent store transactions to the L2 cache are lost
  938. and overwritten with stale memory contents from external memory. The
  939. workaround disables the write-allocate mode for the L2 cache via the
  940. ACTLR register. Note that setting specific bits in the ACTLR register
  941. may not be available in non-secure mode.
  942. config ARM_ERRATA_742230
  943. bool "ARM errata: DMB operation may be faulty"
  944. depends on CPU_V7 && SMP
  945. help
  946. This option enables the workaround for the 742230 Cortex-A9
  947. (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
  948. between two write operations may not ensure the correct visibility
  949. ordering of the two writes. This workaround sets a specific bit in
  950. the diagnostic register of the Cortex-A9 which causes the DMB
  951. instruction to behave as a DSB, ensuring the correct behaviour of
  952. the two writes.
  953. config ARM_ERRATA_742231
  954. bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
  955. depends on CPU_V7 && SMP
  956. help
  957. This option enables the workaround for the 742231 Cortex-A9
  958. (r2p0..r2p2) erratum. Under certain conditions, specific to the
  959. Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
  960. accessing some data located in the same cache line, may get corrupted
  961. data due to bad handling of the address hazard when the line gets
  962. replaced from one of the CPUs at the same time as another CPU is
  963. accessing it. This workaround sets specific bits in the diagnostic
  964. register of the Cortex-A9 which reduces the linefill issuing
  965. capabilities of the processor.
  966. config PL310_ERRATA_588369
  967. bool "Clean & Invalidate maintenance operations do not invalidate clean lines"
  968. depends on CACHE_L2X0
  969. help
  970. The PL310 L2 cache controller implements three types of Clean &
  971. Invalidate maintenance operations: by Physical Address
  972. (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
  973. They are architecturally defined to behave as the execution of a
  974. clean operation followed immediately by an invalidate operation,
  975. both performing to the same memory location. This functionality
  976. is not correctly implemented in PL310 as clean lines are not
  977. invalidated as a result of these operations.
  978. config ARM_ERRATA_720789
  979. bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
  980. depends on CPU_V7 && SMP
  981. help
  982. This option enables the workaround for the 720789 Cortex-A9 (prior to
  983. r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
  984. broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
  985. As a consequence of this erratum, some TLB entries which should be
  986. invalidated are not, resulting in an incoherency in the system page
  987. tables. The workaround changes the TLB flushing routines to invalidate
  988. entries regardless of the ASID.
  989. config PL310_ERRATA_727915
  990. bool "Background Clean & Invalidate by Way operation can cause data corruption"
  991. depends on CACHE_L2X0
  992. help
  993. PL310 implements the Clean & Invalidate by Way L2 cache maintenance
  994. operation (offset 0x7FC). This operation runs in background so that
  995. PL310 can handle normal accesses while it is in progress. Under very
  996. rare circumstances, due to this erratum, write data can be lost when
  997. PL310 treats a cacheable write transaction during a Clean &
  998. Invalidate by Way operation.
  999. config ARM_ERRATA_743622
  1000. bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
  1001. depends on CPU_V7
  1002. help
  1003. This option enables the workaround for the 743622 Cortex-A9
  1004. (r2p0..r2p2) erratum. Under very rare conditions, a faulty
  1005. optimisation in the Cortex-A9 Store Buffer may lead to data
  1006. corruption. This workaround sets a specific bit in the diagnostic
  1007. register of the Cortex-A9 which disables the Store Buffer
  1008. optimisation, preventing the defect from occurring. This has no
  1009. visible impact on the overall performance or power consumption of the
  1010. processor.
  1011. config ARM_ERRATA_751472
  1012. bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
  1013. depends on CPU_V7 && SMP
  1014. help
  1015. This option enables the workaround for the 751472 Cortex-A9 (prior
  1016. to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
  1017. completion of a following broadcasted operation if the second
  1018. operation is received by a CPU before the ICIALLUIS has completed,
  1019. potentially leading to corrupted entries in the cache or TLB.
  1020. config ARM_ERRATA_753970
  1021. bool "ARM errata: cache sync operation may be faulty"
  1022. depends on CACHE_PL310
  1023. help
  1024. This option enables the workaround for the 753970 PL310 (r3p0) erratum.
  1025. Under some condition the effect of cache sync operation on
  1026. the store buffer still remains when the operation completes.
  1027. This means that the store buffer is always asked to drain and
  1028. this prevents it from merging any further writes. The workaround
  1029. is to replace the normal offset of cache sync operation (0x730)
  1030. by another offset targeting an unmapped PL310 register 0x740.
  1031. This has the same effect as the cache sync operation: store buffer
  1032. drain and waiting for all buffers empty.
  1033. config ARM_ERRATA_754322
  1034. bool "ARM errata: possible faulty MMU translations following an ASID switch"
  1035. depends on CPU_V7
  1036. help
  1037. This option enables the workaround for the 754322 Cortex-A9 (r2p*,
  1038. r3p*) erratum. A speculative memory access may cause a page table walk
  1039. which starts prior to an ASID switch but completes afterwards. This
  1040. can populate the micro-TLB with a stale entry which may be hit with
  1041. the new ASID. This workaround places two dsb instructions in the mm
  1042. switching code so that no page table walks can cross the ASID switch.
  1043. config ARM_ERRATA_754327
  1044. bool "ARM errata: no automatic Store Buffer drain"
  1045. depends on CPU_V7 && SMP
  1046. help
  1047. This option enables the workaround for the 754327 Cortex-A9 (prior to
  1048. r2p0) erratum. The Store Buffer does not have any automatic draining
  1049. mechanism and therefore a livelock may occur if an external agent
  1050. continuously polls a memory location waiting to observe an update.
  1051. This workaround defines cpu_relax() as smp_mb(), preventing correctly
  1052. written polling loops from denying visibility of updates to memory.
  1053. endmenu
  1054. source "arch/arm/common/Kconfig"
  1055. menu "Bus support"
  1056. config ARM_AMBA
  1057. bool
  1058. config ISA
  1059. bool
  1060. help
  1061. Find out whether you have ISA slots on your motherboard. ISA is the
  1062. name of a bus system, i.e. the way the CPU talks to the other stuff
  1063. inside your box. Other bus systems are PCI, EISA, MicroChannel
  1064. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  1065. newer boards don't support it. If you have ISA, say Y, otherwise N.
  1066. # Select ISA DMA controller support
  1067. config ISA_DMA
  1068. bool
  1069. select ISA_DMA_API
  1070. # Select ISA DMA interface
  1071. config ISA_DMA_API
  1072. bool
  1073. config PCI
  1074. bool "PCI support" if MIGHT_HAVE_PCI
  1075. help
  1076. Find out whether you have a PCI motherboard. PCI is the name of a
  1077. bus system, i.e. the way the CPU talks to the other stuff inside
  1078. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  1079. VESA. If you have PCI, say Y, otherwise N.
  1080. config PCI_DOMAINS
  1081. bool
  1082. depends on PCI
  1083. config PCI_NANOENGINE
  1084. bool "BSE nanoEngine PCI support"
  1085. depends on SA1100_NANOENGINE
  1086. help
  1087. Enable PCI on the BSE nanoEngine board.
  1088. config PCI_SYSCALL
  1089. def_bool PCI
  1090. # Select the host bridge type
  1091. config PCI_HOST_VIA82C505
  1092. bool
  1093. depends on PCI && ARCH_SHARK
  1094. default y
  1095. config PCI_HOST_ITE8152
  1096. bool
  1097. depends on PCI && MACH_ARMCORE
  1098. default y
  1099. select DMABOUNCE
  1100. source "drivers/pci/Kconfig"
  1101. source "drivers/pcmcia/Kconfig"
  1102. endmenu
  1103. menu "Kernel Features"
  1104. source "kernel/time/Kconfig"
  1105. config SMP
  1106. bool "Symmetric Multi-Processing (EXPERIMENTAL)"
  1107. depends on EXPERIMENTAL
  1108. depends on CPU_V6K || CPU_V7
  1109. depends on GENERIC_CLOCKEVENTS
  1110. depends on REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP || \
  1111. MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || \
  1112. ARCH_EXYNOS4 || ARCH_TEGRA || ARCH_U8500 || ARCH_VEXPRESS_CA9X4 || \
  1113. ARCH_MSM_SCORPIONMP || ARCH_SHMOBILE
  1114. select USE_GENERIC_SMP_HELPERS
  1115. select HAVE_ARM_SCU if !ARCH_MSM_SCORPIONMP
  1116. help
  1117. This enables support for systems with more than one CPU. If you have
  1118. a system with only one CPU, like most personal computers, say N. If
  1119. you have a system with more than one CPU, say Y.
  1120. If you say N here, the kernel will run on single and multiprocessor
  1121. machines, but will use only one CPU of a multiprocessor machine. If
  1122. you say Y here, the kernel will run on many, but not all, single
  1123. processor machines. On a single processor machine, the kernel will
  1124. run faster if you say N here.
  1125. See also <file:Documentation/i386/IO-APIC.txt>,
  1126. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  1127. <http://tldp.org/HOWTO/SMP-HOWTO.html>.
  1128. If you don't know what to do here, say N.
  1129. config SMP_ON_UP
  1130. bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
  1131. depends on EXPERIMENTAL
  1132. depends on SMP && !XIP_KERNEL
  1133. default y
  1134. help
  1135. SMP kernels contain instructions which fail on non-SMP processors.
  1136. Enabling this option allows the kernel to modify itself to make
  1137. these instructions safe. Disabling it allows about 1K of space
  1138. savings.
  1139. If you don't know what to do here, say Y.
  1140. config HAVE_ARM_SCU
  1141. bool
  1142. depends on SMP
  1143. help
  1144. This option enables support for the ARM system coherency unit
  1145. config HAVE_ARM_TWD
  1146. bool
  1147. depends on SMP
  1148. select TICK_ONESHOT
  1149. help
  1150. This options enables support for the ARM timer and watchdog unit
  1151. choice
  1152. prompt "Memory split"
  1153. default VMSPLIT_3G
  1154. help
  1155. Select the desired split between kernel and user memory.
  1156. If you are not absolutely sure what you are doing, leave this
  1157. option alone!
  1158. config VMSPLIT_3G
  1159. bool "3G/1G user/kernel split"
  1160. config VMSPLIT_2G
  1161. bool "2G/2G user/kernel split"
  1162. config VMSPLIT_1G
  1163. bool "1G/3G user/kernel split"
  1164. endchoice
  1165. config PAGE_OFFSET
  1166. hex
  1167. default 0x40000000 if VMSPLIT_1G
  1168. default 0x80000000 if VMSPLIT_2G
  1169. default 0xC0000000
  1170. config NR_CPUS
  1171. int "Maximum number of CPUs (2-32)"
  1172. range 2 32
  1173. depends on SMP
  1174. default "4"
  1175. config HOTPLUG_CPU
  1176. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  1177. depends on SMP && HOTPLUG && EXPERIMENTAL
  1178. depends on !ARCH_MSM
  1179. help
  1180. Say Y here to experiment with turning CPUs off and on. CPUs
  1181. can be controlled through /sys/devices/system/cpu.
  1182. config LOCAL_TIMERS
  1183. bool "Use local timer interrupts"
  1184. depends on SMP
  1185. default y
  1186. select HAVE_ARM_TWD if (!ARCH_MSM_SCORPIONMP && !EXYNOS4_MCT)
  1187. help
  1188. Enable support for local timers on SMP platforms, rather then the
  1189. legacy IPI broadcast method. Local timers allows the system
  1190. accounting to be spread across the timer interval, preventing a
  1191. "thundering herd" at every timer tick.
  1192. source kernel/Kconfig.preempt
  1193. config HZ
  1194. int
  1195. default 200 if ARCH_EBSA110 || ARCH_S3C2410 || ARCH_S5P64X0 || \
  1196. ARCH_S5P6442 || ARCH_S5PV210 || ARCH_EXYNOS4
  1197. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  1198. default AT91_TIMER_HZ if ARCH_AT91
  1199. default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
  1200. default 100
  1201. config THUMB2_KERNEL
  1202. bool "Compile the kernel in Thumb-2 mode (EXPERIMENTAL)"
  1203. depends on CPU_V7 && !CPU_V6 && !CPU_V6K && EXPERIMENTAL
  1204. select AEABI
  1205. select ARM_ASM_UNIFIED
  1206. help
  1207. By enabling this option, the kernel will be compiled in
  1208. Thumb-2 mode. A compiler/assembler that understand the unified
  1209. ARM-Thumb syntax is needed.
  1210. If unsure, say N.
  1211. config THUMB2_AVOID_R_ARM_THM_JUMP11
  1212. bool "Work around buggy Thumb-2 short branch relocations in gas"
  1213. depends on THUMB2_KERNEL && MODULES
  1214. default y
  1215. help
  1216. Various binutils versions can resolve Thumb-2 branches to
  1217. locally-defined, preemptible global symbols as short-range "b.n"
  1218. branch instructions.
  1219. This is a problem, because there's no guarantee the final
  1220. destination of the symbol, or any candidate locations for a
  1221. trampoline, are within range of the branch. For this reason, the
  1222. kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
  1223. relocation in modules at all, and it makes little sense to add
  1224. support.
  1225. The symptom is that the kernel fails with an "unsupported
  1226. relocation" error when loading some modules.
  1227. Until fixed tools are available, passing
  1228. -fno-optimize-sibling-calls to gcc should prevent gcc generating
  1229. code which hits this problem, at the cost of a bit of extra runtime
  1230. stack usage in some cases.
  1231. The problem is described in more detail at:
  1232. https://bugs.launchpad.net/binutils-linaro/+bug/725126
  1233. Only Thumb-2 kernels are affected.
  1234. Unless you are sure your tools don't have this problem, say Y.
  1235. config ARM_ASM_UNIFIED
  1236. bool
  1237. config AEABI
  1238. bool "Use the ARM EABI to compile the kernel"
  1239. help
  1240. This option allows for the kernel to be compiled using the latest
  1241. ARM ABI (aka EABI). This is only useful if you are using a user
  1242. space environment that is also compiled with EABI.
  1243. Since there are major incompatibilities between the legacy ABI and
  1244. EABI, especially with regard to structure member alignment, this
  1245. option also changes the kernel syscall calling convention to
  1246. disambiguate both ABIs and allow for backward compatibility support
  1247. (selected with CONFIG_OABI_COMPAT).
  1248. To use this you need GCC version 4.0.0 or later.
  1249. config OABI_COMPAT
  1250. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  1251. depends on AEABI && EXPERIMENTAL && !THUMB2_KERNEL
  1252. default y
  1253. help
  1254. This option preserves the old syscall interface along with the
  1255. new (ARM EABI) one. It also provides a compatibility layer to
  1256. intercept syscalls that have structure arguments which layout
  1257. in memory differs between the legacy ABI and the new ARM EABI
  1258. (only for non "thumb" binaries). This option adds a tiny
  1259. overhead to all syscalls and produces a slightly larger kernel.
  1260. If you know you'll be using only pure EABI user space then you
  1261. can say N here. If this option is not selected and you attempt
  1262. to execute a legacy ABI binary then the result will be
  1263. UNPREDICTABLE (in fact it can be predicted that it won't work
  1264. at all). If in doubt say Y.
  1265. config ARCH_HAS_HOLES_MEMORYMODEL
  1266. bool
  1267. config ARCH_SPARSEMEM_ENABLE
  1268. bool
  1269. config ARCH_SPARSEMEM_DEFAULT
  1270. def_bool ARCH_SPARSEMEM_ENABLE
  1271. config ARCH_SELECT_MEMORY_MODEL
  1272. def_bool ARCH_SPARSEMEM_ENABLE
  1273. config HIGHMEM
  1274. bool "High Memory Support (EXPERIMENTAL)"
  1275. depends on MMU && EXPERIMENTAL
  1276. help
  1277. The address space of ARM processors is only 4 Gigabytes large
  1278. and it has to accommodate user address space, kernel address
  1279. space as well as some memory mapped IO. That means that, if you
  1280. have a large amount of physical memory and/or IO, not all of the
  1281. memory can be "permanently mapped" by the kernel. The physical
  1282. memory that is not permanently mapped is called "high memory".
  1283. Depending on the selected kernel/user memory split, minimum
  1284. vmalloc space and actual amount of RAM, you may not need this
  1285. option which should result in a slightly faster kernel.
  1286. If unsure, say n.
  1287. config HIGHPTE
  1288. bool "Allocate 2nd-level pagetables from highmem"
  1289. depends on HIGHMEM
  1290. depends on !OUTER_CACHE
  1291. config HW_PERF_EVENTS
  1292. bool "Enable hardware performance counter support for perf events"
  1293. depends on PERF_EVENTS && CPU_HAS_PMU
  1294. default y
  1295. help
  1296. Enable hardware performance counter support for perf events. If
  1297. disabled, perf events will use software events only.
  1298. source "mm/Kconfig"
  1299. config FORCE_MAX_ZONEORDER
  1300. int "Maximum zone order" if ARCH_SHMOBILE
  1301. range 11 64 if ARCH_SHMOBILE
  1302. default "9" if SA1111
  1303. default "11"
  1304. help
  1305. The kernel memory allocator divides physically contiguous memory
  1306. blocks into "zones", where each zone is a power of two number of
  1307. pages. This option selects the largest power of two that the kernel
  1308. keeps in the memory allocator. If you need to allocate very large
  1309. blocks of physically contiguous memory, then you may need to
  1310. increase this value.
  1311. This config option is actually maximum order plus one. For example,
  1312. a value of 11 means that the largest free memory block is 2^10 pages.
  1313. config LEDS
  1314. bool "Timer and CPU usage LEDs"
  1315. depends on ARCH_CDB89712 || ARCH_EBSA110 || \
  1316. ARCH_EBSA285 || ARCH_INTEGRATOR || \
  1317. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  1318. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  1319. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  1320. ARCH_AT91 || ARCH_DAVINCI || \
  1321. ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
  1322. help
  1323. If you say Y here, the LEDs on your machine will be used
  1324. to provide useful information about your current system status.
  1325. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  1326. be able to select which LEDs are active using the options below. If
  1327. you are compiling a kernel for the EBSA-110 or the LART however, the
  1328. red LED will simply flash regularly to indicate that the system is
  1329. still functional. It is safe to say Y here if you have a CATS
  1330. system, but the driver will do nothing.
  1331. config LEDS_TIMER
  1332. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  1333. OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1334. || MACH_OMAP_PERSEUS2
  1335. depends on LEDS
  1336. depends on !GENERIC_CLOCKEVENTS
  1337. default y if ARCH_EBSA110
  1338. help
  1339. If you say Y here, one of the system LEDs (the green one on the
  1340. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  1341. will flash regularly to indicate that the system is still
  1342. operational. This is mainly useful to kernel hackers who are
  1343. debugging unstable kernels.
  1344. The LART uses the same LED for both Timer LED and CPU usage LED
  1345. functions. You may choose to use both, but the Timer LED function
  1346. will overrule the CPU usage LED.
  1347. config LEDS_CPU
  1348. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  1349. !ARCH_OMAP) \
  1350. || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1351. || MACH_OMAP_PERSEUS2
  1352. depends on LEDS
  1353. help
  1354. If you say Y here, the red LED will be used to give a good real
  1355. time indication of CPU usage, by lighting whenever the idle task
  1356. is not currently executing.
  1357. The LART uses the same LED for both Timer LED and CPU usage LED
  1358. functions. You may choose to use both, but the Timer LED function
  1359. will overrule the CPU usage LED.
  1360. config ALIGNMENT_TRAP
  1361. bool
  1362. depends on CPU_CP15_MMU
  1363. default y if !ARCH_EBSA110
  1364. select HAVE_PROC_CPU if PROC_FS
  1365. help
  1366. ARM processors cannot fetch/store information which is not
  1367. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  1368. address divisible by 4. On 32-bit ARM processors, these non-aligned
  1369. fetch/store instructions will be emulated in software if you say
  1370. here, which has a severe performance impact. This is necessary for
  1371. correct operation of some network protocols. With an IP-only
  1372. configuration it is safe to say N, otherwise say Y.
  1373. config UACCESS_WITH_MEMCPY
  1374. bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
  1375. depends on MMU && EXPERIMENTAL
  1376. default y if CPU_FEROCEON
  1377. help
  1378. Implement faster copy_to_user and clear_user methods for CPU
  1379. cores where a 8-word STM instruction give significantly higher
  1380. memory write throughput than a sequence of individual 32bit stores.
  1381. A possible side effect is a slight increase in scheduling latency
  1382. between threads sharing the same address space if they invoke
  1383. such copy operations with large buffers.
  1384. However, if the CPU data cache is using a write-allocate mode,
  1385. this option is unlikely to provide any performance gain.
  1386. config SECCOMP
  1387. bool
  1388. prompt "Enable seccomp to safely compute untrusted bytecode"
  1389. ---help---
  1390. This kernel feature is useful for number crunching applications
  1391. that may need to compute untrusted bytecode during their
  1392. execution. By using pipes or other transports made available to
  1393. the process as file descriptors supporting the read/write
  1394. syscalls, it's possible to isolate those applications in
  1395. their own address space using seccomp. Once seccomp is
  1396. enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
  1397. and the task is only allowed to execute a few safe syscalls
  1398. defined by each seccomp mode.
  1399. config CC_STACKPROTECTOR
  1400. bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
  1401. depends on EXPERIMENTAL
  1402. help
  1403. This option turns on the -fstack-protector GCC feature. This
  1404. feature puts, at the beginning of functions, a canary value on
  1405. the stack just before the return address, and validates
  1406. the value just before actually returning. Stack based buffer
  1407. overflows (that need to overwrite this return address) now also
  1408. overwrite the canary, which gets detected and the attack is then
  1409. neutralized via a kernel panic.
  1410. This feature requires gcc version 4.2 or above.
  1411. config DEPRECATED_PARAM_STRUCT
  1412. bool "Provide old way to pass kernel parameters"
  1413. help
  1414. This was deprecated in 2001 and announced to live on for 5 years.
  1415. Some old boot loaders still use this way.
  1416. endmenu
  1417. menu "Boot options"
  1418. # Compressed boot loader in ROM. Yes, we really want to ask about
  1419. # TEXT and BSS so we preserve their values in the config files.
  1420. config ZBOOT_ROM_TEXT
  1421. hex "Compressed ROM boot loader base address"
  1422. default "0"
  1423. help
  1424. The physical address at which the ROM-able zImage is to be
  1425. placed in the target. Platforms which normally make use of
  1426. ROM-able zImage formats normally set this to a suitable
  1427. value in their defconfig file.
  1428. If ZBOOT_ROM is not enabled, this has no effect.
  1429. config ZBOOT_ROM_BSS
  1430. hex "Compressed ROM boot loader BSS address"
  1431. default "0"
  1432. help
  1433. The base address of an area of read/write memory in the target
  1434. for the ROM-able zImage which must be available while the
  1435. decompressor is running. It must be large enough to hold the
  1436. entire decompressed kernel plus an additional 128 KiB.
  1437. Platforms which normally make use of ROM-able zImage formats
  1438. normally set this to a suitable value in their defconfig file.
  1439. If ZBOOT_ROM is not enabled, this has no effect.
  1440. config ZBOOT_ROM
  1441. bool "Compressed boot loader in ROM/flash"
  1442. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  1443. help
  1444. Say Y here if you intend to execute your compressed kernel image
  1445. (zImage) directly from ROM or flash. If unsure, say N.
  1446. config ZBOOT_ROM_MMCIF
  1447. bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
  1448. depends on ZBOOT_ROM && ARCH_SH7372 && EXPERIMENTAL
  1449. help
  1450. Say Y here to include experimental MMCIF loading code in the
  1451. ROM-able zImage. With this enabled it is possible to write the
  1452. the ROM-able zImage kernel image to an MMC card and boot the
  1453. kernel straight from the reset vector. At reset the processor
  1454. Mask ROM will load the first part of the the ROM-able zImage
  1455. which in turn loads the rest the kernel image to RAM using the
  1456. MMCIF hardware block.
  1457. config CMDLINE
  1458. string "Default kernel command string"
  1459. default ""
  1460. help
  1461. On some architectures (EBSA110 and CATS), there is currently no way
  1462. for the boot loader to pass arguments to the kernel. For these
  1463. architectures, you should supply some command-line options at build
  1464. time by entering them here. As a minimum, you should specify the
  1465. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  1466. config CMDLINE_FORCE
  1467. bool "Always use the default kernel command string"
  1468. depends on CMDLINE != ""
  1469. help
  1470. Always use the default kernel command string, even if the boot
  1471. loader passes other arguments to the kernel.
  1472. This is useful if you cannot or don't want to change the
  1473. command-line options your boot loader passes to the kernel.
  1474. If unsure, say N.
  1475. config XIP_KERNEL
  1476. bool "Kernel Execute-In-Place from ROM"
  1477. depends on !ZBOOT_ROM
  1478. help
  1479. Execute-In-Place allows the kernel to run from non-volatile storage
  1480. directly addressable by the CPU, such as NOR flash. This saves RAM
  1481. space since the text section of the kernel is not loaded from flash
  1482. to RAM. Read-write sections, such as the data section and stack,
  1483. are still copied to RAM. The XIP kernel is not compressed since
  1484. it has to run directly from flash, so it will take more space to
  1485. store it. The flash address used to link the kernel object files,
  1486. and for storing it, is configuration dependent. Therefore, if you
  1487. say Y here, you must know the proper physical address where to
  1488. store the kernel image depending on your own flash memory usage.
  1489. Also note that the make target becomes "make xipImage" rather than
  1490. "make zImage" or "make Image". The final kernel binary to put in
  1491. ROM memory will be arch/arm/boot/xipImage.
  1492. If unsure, say N.
  1493. config XIP_PHYS_ADDR
  1494. hex "XIP Kernel Physical Location"
  1495. depends on XIP_KERNEL
  1496. default "0x00080000"
  1497. help
  1498. This is the physical address in your flash memory the kernel will
  1499. be linked for and stored to. This address is dependent on your
  1500. own flash usage.
  1501. config KEXEC
  1502. bool "Kexec system call (EXPERIMENTAL)"
  1503. depends on EXPERIMENTAL
  1504. help
  1505. kexec is a system call that implements the ability to shutdown your
  1506. current kernel, and to start another kernel. It is like a reboot
  1507. but it is independent of the system firmware. And like a reboot
  1508. you can start any kernel with it, not just Linux.
  1509. It is an ongoing process to be certain the hardware in a machine
  1510. is properly shutdown, so do not be surprised if this code does not
  1511. initially work for you. It may help to enable device hotplugging
  1512. support.
  1513. config ATAGS_PROC
  1514. bool "Export atags in procfs"
  1515. depends on KEXEC
  1516. default y
  1517. help
  1518. Should the atags used to boot the kernel be exported in an "atags"
  1519. file in procfs. Useful with kexec.
  1520. config CRASH_DUMP
  1521. bool "Build kdump crash kernel (EXPERIMENTAL)"
  1522. depends on EXPERIMENTAL
  1523. help
  1524. Generate crash dump after being started by kexec. This should
  1525. be normally only set in special crash dump kernels which are
  1526. loaded in the main kernel with kexec-tools into a specially
  1527. reserved region and then later executed after a crash by
  1528. kdump/kexec. The crash dump kernel must be compiled to a
  1529. memory address not used by the main kernel
  1530. For more details see Documentation/kdump/kdump.txt
  1531. config AUTO_ZRELADDR
  1532. bool "Auto calculation of the decompressed kernel image address"
  1533. depends on !ZBOOT_ROM && !ARCH_U300
  1534. help
  1535. ZRELADDR is the physical address where the decompressed kernel
  1536. image will be placed. If AUTO_ZRELADDR is selected, the address
  1537. will be determined at run-time by masking the current IP with
  1538. 0xf8000000. This assumes the zImage being placed in the first 128MB
  1539. from start of memory.
  1540. endmenu
  1541. menu "CPU Power Management"
  1542. if ARCH_HAS_CPUFREQ
  1543. source "drivers/cpufreq/Kconfig"
  1544. config CPU_FREQ_IMX
  1545. tristate "CPUfreq driver for i.MX CPUs"
  1546. depends on ARCH_MXC && CPU_FREQ
  1547. help
  1548. This enables the CPUfreq driver for i.MX CPUs.
  1549. config CPU_FREQ_SA1100
  1550. bool
  1551. config CPU_FREQ_SA1110
  1552. bool
  1553. config CPU_FREQ_INTEGRATOR
  1554. tristate "CPUfreq driver for ARM Integrator CPUs"
  1555. depends on ARCH_INTEGRATOR && CPU_FREQ
  1556. default y
  1557. help
  1558. This enables the CPUfreq driver for ARM Integrator CPUs.
  1559. For details, take a look at <file:Documentation/cpu-freq>.
  1560. If in doubt, say Y.
  1561. config CPU_FREQ_PXA
  1562. bool
  1563. depends on CPU_FREQ && ARCH_PXA && PXA25x
  1564. default y
  1565. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  1566. config CPU_FREQ_S3C64XX
  1567. bool "CPUfreq support for Samsung S3C64XX CPUs"
  1568. depends on CPU_FREQ && CPU_S3C6410
  1569. config CPU_FREQ_S3C
  1570. bool
  1571. help
  1572. Internal configuration node for common cpufreq on Samsung SoC
  1573. config CPU_FREQ_S3C24XX
  1574. bool "CPUfreq driver for Samsung S3C24XX series CPUs (EXPERIMENTAL)"
  1575. depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
  1576. select CPU_FREQ_S3C
  1577. help
  1578. This enables the CPUfreq driver for the Samsung S3C24XX family
  1579. of CPUs.
  1580. For details, take a look at <file:Documentation/cpu-freq>.
  1581. If in doubt, say N.
  1582. config CPU_FREQ_S3C24XX_PLL
  1583. bool "Support CPUfreq changing of PLL frequency (EXPERIMENTAL)"
  1584. depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
  1585. help
  1586. Compile in support for changing the PLL frequency from the
  1587. S3C24XX series CPUfreq driver. The PLL takes time to settle
  1588. after a frequency change, so by default it is not enabled.
  1589. This also means that the PLL tables for the selected CPU(s) will
  1590. be built which may increase the size of the kernel image.
  1591. config CPU_FREQ_S3C24XX_DEBUG
  1592. bool "Debug CPUfreq Samsung driver core"
  1593. depends on CPU_FREQ_S3C24XX
  1594. help
  1595. Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
  1596. config CPU_FREQ_S3C24XX_IODEBUG
  1597. bool "Debug CPUfreq Samsung driver IO timing"
  1598. depends on CPU_FREQ_S3C24XX
  1599. help
  1600. Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
  1601. config CPU_FREQ_S3C24XX_DEBUGFS
  1602. bool "Export debugfs for CPUFreq"
  1603. depends on CPU_FREQ_S3C24XX && DEBUG_FS
  1604. help
  1605. Export status information via debugfs.
  1606. endif
  1607. source "drivers/cpuidle/Kconfig"
  1608. endmenu
  1609. menu "Floating point emulation"
  1610. comment "At least one emulation must be selected"
  1611. config FPE_NWFPE
  1612. bool "NWFPE math emulation"
  1613. depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
  1614. ---help---
  1615. Say Y to include the NWFPE floating point emulator in the kernel.
  1616. This is necessary to run most binaries. Linux does not currently
  1617. support floating point hardware so you need to say Y here even if
  1618. your machine has an FPA or floating point co-processor podule.
  1619. You may say N here if you are going to load the Acorn FPEmulator
  1620. early in the bootup.
  1621. config FPE_NWFPE_XP
  1622. bool "Support extended precision"
  1623. depends on FPE_NWFPE
  1624. help
  1625. Say Y to include 80-bit support in the kernel floating-point
  1626. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  1627. Note that gcc does not generate 80-bit operations by default,
  1628. so in most cases this option only enlarges the size of the
  1629. floating point emulator without any good reason.
  1630. You almost surely want to say N here.
  1631. config FPE_FASTFPE
  1632. bool "FastFPE math emulation (EXPERIMENTAL)"
  1633. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  1634. ---help---
  1635. Say Y here to include the FAST floating point emulator in the kernel.
  1636. This is an experimental much faster emulator which now also has full
  1637. precision for the mantissa. It does not support any exceptions.
  1638. It is very simple, and approximately 3-6 times faster than NWFPE.
  1639. It should be sufficient for most programs. It may be not suitable
  1640. for scientific calculations, but you have to check this for yourself.
  1641. If you do not feel you need a faster FP emulation you should better
  1642. choose NWFPE.
  1643. config VFP
  1644. bool "VFP-format floating point maths"
  1645. depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  1646. help
  1647. Say Y to include VFP support code in the kernel. This is needed
  1648. if your hardware includes a VFP unit.
  1649. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  1650. release notes and additional status information.
  1651. Say N if your target does not have VFP hardware.
  1652. config VFPv3
  1653. bool
  1654. depends on VFP
  1655. default y if CPU_V7
  1656. config NEON
  1657. bool "Advanced SIMD (NEON) Extension support"
  1658. depends on VFPv3 && CPU_V7
  1659. help
  1660. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  1661. Extension.
  1662. endmenu
  1663. menu "Userspace binary formats"
  1664. source "fs/Kconfig.binfmt"
  1665. config ARTHUR
  1666. tristate "RISC OS personality"
  1667. depends on !AEABI
  1668. help
  1669. Say Y here to include the kernel code necessary if you want to run
  1670. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  1671. experimental; if this sounds frightening, say N and sleep in peace.
  1672. You can also say M here to compile this support as a module (which
  1673. will be called arthur).
  1674. endmenu
  1675. menu "Power management options"
  1676. source "kernel/power/Kconfig"
  1677. config ARCH_SUSPEND_POSSIBLE
  1678. def_bool y
  1679. endmenu
  1680. source "net/Kconfig"
  1681. source "drivers/Kconfig"
  1682. source "fs/Kconfig"
  1683. source "arch/arm/Kconfig.debug"
  1684. source "security/Kconfig"
  1685. source "crypto/Kconfig"
  1686. source "lib/Kconfig"