Kconfig 65 KB

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  1. config ARM
  2. bool
  3. default y
  4. select ARCH_HAVE_CUSTOM_GPIO_H
  5. select HAVE_AOUT
  6. select HAVE_DMA_API_DEBUG
  7. select HAVE_IDE if PCI || ISA || PCMCIA
  8. select HAVE_DMA_ATTRS
  9. select HAVE_DMA_CONTIGUOUS if (CPU_V6 || CPU_V6K || CPU_V7)
  10. select HAVE_MEMBLOCK
  11. select RTC_LIB
  12. select SYS_SUPPORTS_APM_EMULATION
  13. select GENERIC_ATOMIC64 if (CPU_V6 || !CPU_32v6K || !AEABI)
  14. select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
  15. select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL
  16. select HAVE_ARCH_KGDB
  17. select HAVE_ARCH_TRACEHOOK
  18. select HAVE_KPROBES if !XIP_KERNEL
  19. select HAVE_KRETPROBES if (HAVE_KPROBES)
  20. select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
  21. select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
  22. select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL)
  23. select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL)
  24. select ARCH_BINFMT_ELF_RANDOMIZE_PIE
  25. select HAVE_GENERIC_DMA_COHERENT
  26. select HAVE_KERNEL_GZIP
  27. select HAVE_KERNEL_LZO
  28. select HAVE_KERNEL_LZMA
  29. select HAVE_KERNEL_XZ
  30. select HAVE_IRQ_WORK
  31. select HAVE_PERF_EVENTS
  32. select PERF_USE_VMALLOC
  33. select HAVE_REGS_AND_STACK_ACCESS_API
  34. select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7))
  35. select HAVE_C_RECORDMCOUNT
  36. select HAVE_GENERIC_HARDIRQS
  37. select HARDIRQS_SW_RESEND
  38. select GENERIC_IRQ_PROBE
  39. select GENERIC_IRQ_SHOW
  40. select GENERIC_IRQ_PROBE
  41. select HARDIRQS_SW_RESEND
  42. select CPU_PM if (SUSPEND || CPU_IDLE)
  43. select GENERIC_PCI_IOMAP
  44. select HAVE_BPF_JIT
  45. select GENERIC_SMP_IDLE_THREAD
  46. select KTIME_SCALAR
  47. select GENERIC_CLOCKEVENTS_BROADCAST if SMP
  48. help
  49. The ARM series is a line of low-power-consumption RISC chip designs
  50. licensed by ARM Ltd and targeted at embedded applications and
  51. handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
  52. manufactured, but legacy ARM-based PC hardware remains popular in
  53. Europe. There is an ARM Linux project with a web page at
  54. <http://www.arm.linux.org.uk/>.
  55. config ARM_HAS_SG_CHAIN
  56. bool
  57. config NEED_SG_DMA_LENGTH
  58. bool
  59. config ARM_DMA_USE_IOMMU
  60. select NEED_SG_DMA_LENGTH
  61. select ARM_HAS_SG_CHAIN
  62. bool
  63. config HAVE_PWM
  64. bool
  65. config MIGHT_HAVE_PCI
  66. bool
  67. config SYS_SUPPORTS_APM_EMULATION
  68. bool
  69. config GENERIC_GPIO
  70. bool
  71. config HAVE_TCM
  72. bool
  73. select GENERIC_ALLOCATOR
  74. config HAVE_PROC_CPU
  75. bool
  76. config NO_IOPORT
  77. bool
  78. config EISA
  79. bool
  80. ---help---
  81. The Extended Industry Standard Architecture (EISA) bus was
  82. developed as an open alternative to the IBM MicroChannel bus.
  83. The EISA bus provided some of the features of the IBM MicroChannel
  84. bus while maintaining backward compatibility with cards made for
  85. the older ISA bus. The EISA bus saw limited use between 1988 and
  86. 1995 when it was made obsolete by the PCI bus.
  87. Say Y here if you are building a kernel for an EISA-based machine.
  88. Otherwise, say N.
  89. config SBUS
  90. bool
  91. config STACKTRACE_SUPPORT
  92. bool
  93. default y
  94. config HAVE_LATENCYTOP_SUPPORT
  95. bool
  96. depends on !SMP
  97. default y
  98. config LOCKDEP_SUPPORT
  99. bool
  100. default y
  101. config TRACE_IRQFLAGS_SUPPORT
  102. bool
  103. default y
  104. config GENERIC_LOCKBREAK
  105. bool
  106. default y
  107. depends on SMP && PREEMPT
  108. config RWSEM_GENERIC_SPINLOCK
  109. bool
  110. default y
  111. config RWSEM_XCHGADD_ALGORITHM
  112. bool
  113. config ARCH_HAS_ILOG2_U32
  114. bool
  115. config ARCH_HAS_ILOG2_U64
  116. bool
  117. config ARCH_HAS_CPUFREQ
  118. bool
  119. help
  120. Internal node to signify that the ARCH has CPUFREQ support
  121. and that the relevant menu configurations are displayed for
  122. it.
  123. config GENERIC_HWEIGHT
  124. bool
  125. default y
  126. config GENERIC_CALIBRATE_DELAY
  127. bool
  128. default y
  129. config ARCH_MAY_HAVE_PC_FDC
  130. bool
  131. config ZONE_DMA
  132. bool
  133. config NEED_DMA_MAP_STATE
  134. def_bool y
  135. config ARCH_HAS_DMA_SET_COHERENT_MASK
  136. bool
  137. config GENERIC_ISA_DMA
  138. bool
  139. config FIQ
  140. bool
  141. config NEED_RET_TO_USER
  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" if EMBEDDED
  154. default y
  155. depends on !XIP_KERNEL && MMU
  156. depends on !ARCH_REALVIEW || !SPARSEMEM
  157. help
  158. Patch phys-to-virt and virt-to-phys translation functions at
  159. boot and module load time according to the position of the
  160. kernel in system memory.
  161. This can only be used with non-XIP MMU kernels where the base
  162. of physical memory is at a 16MB boundary.
  163. Only disable this option if you know that you do not require
  164. this feature (eg, building a kernel for a single machine) and
  165. you need to shrink the kernel to the minimal size.
  166. config NEED_MACH_IO_H
  167. bool
  168. help
  169. Select this when mach/io.h is required to provide special
  170. definitions for this platform. The need for mach/io.h should
  171. be avoided when possible.
  172. config NEED_MACH_MEMORY_H
  173. bool
  174. help
  175. Select this when mach/memory.h is required to provide special
  176. definitions for this platform. The need for mach/memory.h should
  177. be avoided when possible.
  178. config PHYS_OFFSET
  179. hex "Physical address of main memory" if MMU
  180. depends on !ARM_PATCH_PHYS_VIRT && !NEED_MACH_MEMORY_H
  181. default DRAM_BASE if !MMU
  182. help
  183. Please provide the physical address corresponding to the
  184. location of main memory in your system.
  185. config GENERIC_BUG
  186. def_bool y
  187. depends on BUG
  188. source "init/Kconfig"
  189. source "kernel/Kconfig.freezer"
  190. menu "System Type"
  191. config MMU
  192. bool "MMU-based Paged Memory Management Support"
  193. default y
  194. help
  195. Select if you want MMU-based virtualised addressing space
  196. support by paged memory management. If unsure, say 'Y'.
  197. #
  198. # The "ARM system type" choice list is ordered alphabetically by option
  199. # text. Please add new entries in the option alphabetic order.
  200. #
  201. choice
  202. prompt "ARM system type"
  203. default ARCH_VERSATILE
  204. config ARCH_INTEGRATOR
  205. bool "ARM Ltd. Integrator family"
  206. select ARM_AMBA
  207. select ARCH_HAS_CPUFREQ
  208. select CLKDEV_LOOKUP
  209. select HAVE_MACH_CLKDEV
  210. select HAVE_TCM
  211. select ICST
  212. select GENERIC_CLOCKEVENTS
  213. select PLAT_VERSATILE
  214. select PLAT_VERSATILE_FPGA_IRQ
  215. select NEED_MACH_IO_H
  216. select NEED_MACH_MEMORY_H
  217. select SPARSE_IRQ
  218. select MULTI_IRQ_HANDLER
  219. help
  220. Support for ARM's Integrator platform.
  221. config ARCH_REALVIEW
  222. bool "ARM Ltd. RealView family"
  223. select ARM_AMBA
  224. select CLKDEV_LOOKUP
  225. select HAVE_MACH_CLKDEV
  226. select ICST
  227. select GENERIC_CLOCKEVENTS
  228. select ARCH_WANT_OPTIONAL_GPIOLIB
  229. select PLAT_VERSATILE
  230. select PLAT_VERSATILE_CLCD
  231. select ARM_TIMER_SP804
  232. select GPIO_PL061 if GPIOLIB
  233. select NEED_MACH_MEMORY_H
  234. help
  235. This enables support for ARM Ltd RealView boards.
  236. config ARCH_VERSATILE
  237. bool "ARM Ltd. Versatile family"
  238. select ARM_AMBA
  239. select ARM_VIC
  240. select CLKDEV_LOOKUP
  241. select HAVE_MACH_CLKDEV
  242. select ICST
  243. select GENERIC_CLOCKEVENTS
  244. select ARCH_WANT_OPTIONAL_GPIOLIB
  245. select NEED_MACH_IO_H if PCI
  246. select PLAT_VERSATILE
  247. select PLAT_VERSATILE_CLCD
  248. select PLAT_VERSATILE_FPGA_IRQ
  249. select ARM_TIMER_SP804
  250. help
  251. This enables support for ARM Ltd Versatile board.
  252. config ARCH_VEXPRESS
  253. bool "ARM Ltd. Versatile Express family"
  254. select ARCH_WANT_OPTIONAL_GPIOLIB
  255. select ARM_AMBA
  256. select ARM_TIMER_SP804
  257. select CLKDEV_LOOKUP
  258. select HAVE_MACH_CLKDEV
  259. select GENERIC_CLOCKEVENTS
  260. select HAVE_CLK
  261. select HAVE_PATA_PLATFORM
  262. select ICST
  263. select NO_IOPORT
  264. select PLAT_VERSATILE
  265. select PLAT_VERSATILE_CLCD
  266. help
  267. This enables support for the ARM Ltd Versatile Express boards.
  268. config ARCH_AT91
  269. bool "Atmel AT91"
  270. select ARCH_REQUIRE_GPIOLIB
  271. select HAVE_CLK
  272. select CLKDEV_LOOKUP
  273. select IRQ_DOMAIN
  274. select NEED_MACH_IO_H if PCCARD
  275. help
  276. This enables support for systems based on Atmel
  277. AT91RM9200 and AT91SAM9* processors.
  278. config ARCH_BCMRING
  279. bool "Broadcom BCMRING"
  280. depends on MMU
  281. select CPU_V6
  282. select ARM_AMBA
  283. select ARM_TIMER_SP804
  284. select CLKDEV_LOOKUP
  285. select GENERIC_CLOCKEVENTS
  286. select ARCH_WANT_OPTIONAL_GPIOLIB
  287. help
  288. Support for Broadcom's BCMRing platform.
  289. config ARCH_HIGHBANK
  290. bool "Calxeda Highbank-based"
  291. select ARCH_WANT_OPTIONAL_GPIOLIB
  292. select ARM_AMBA
  293. select ARM_GIC
  294. select ARM_TIMER_SP804
  295. select CACHE_L2X0
  296. select CLKDEV_LOOKUP
  297. select CPU_V7
  298. select GENERIC_CLOCKEVENTS
  299. select HAVE_ARM_SCU
  300. select HAVE_SMP
  301. select SPARSE_IRQ
  302. select USE_OF
  303. help
  304. Support for the Calxeda Highbank SoC based boards.
  305. config ARCH_CLPS711X
  306. bool "Cirrus Logic CLPS711x/EP721x/EP731x-based"
  307. select CPU_ARM720T
  308. select ARCH_USES_GETTIMEOFFSET
  309. select NEED_MACH_MEMORY_H
  310. help
  311. Support for Cirrus Logic 711x/721x/731x based boards.
  312. config ARCH_CNS3XXX
  313. bool "Cavium Networks CNS3XXX family"
  314. select CPU_V6K
  315. select GENERIC_CLOCKEVENTS
  316. select ARM_GIC
  317. select MIGHT_HAVE_CACHE_L2X0
  318. select MIGHT_HAVE_PCI
  319. select PCI_DOMAINS if PCI
  320. help
  321. Support for Cavium Networks CNS3XXX platform.
  322. config ARCH_GEMINI
  323. bool "Cortina Systems Gemini"
  324. select CPU_FA526
  325. select ARCH_REQUIRE_GPIOLIB
  326. select ARCH_USES_GETTIMEOFFSET
  327. help
  328. Support for the Cortina Systems Gemini family SoCs
  329. config ARCH_PRIMA2
  330. bool "CSR SiRFSoC PRIMA2 ARM Cortex A9 Platform"
  331. select CPU_V7
  332. select NO_IOPORT
  333. select GENERIC_CLOCKEVENTS
  334. select CLKDEV_LOOKUP
  335. select GENERIC_IRQ_CHIP
  336. select MIGHT_HAVE_CACHE_L2X0
  337. select PINCTRL
  338. select PINCTRL_SIRF
  339. select USE_OF
  340. select ZONE_DMA
  341. help
  342. Support for CSR SiRFSoC ARM Cortex A9 Platform
  343. config ARCH_EBSA110
  344. bool "EBSA-110"
  345. select CPU_SA110
  346. select ISA
  347. select NO_IOPORT
  348. select ARCH_USES_GETTIMEOFFSET
  349. select NEED_MACH_IO_H
  350. select NEED_MACH_MEMORY_H
  351. help
  352. This is an evaluation board for the StrongARM processor available
  353. from Digital. It has limited hardware on-board, including an
  354. Ethernet interface, two PCMCIA sockets, two serial ports and a
  355. parallel port.
  356. config ARCH_EP93XX
  357. bool "EP93xx-based"
  358. select CPU_ARM920T
  359. select ARM_AMBA
  360. select ARM_VIC
  361. select CLKDEV_LOOKUP
  362. select ARCH_REQUIRE_GPIOLIB
  363. select ARCH_HAS_HOLES_MEMORYMODEL
  364. select ARCH_USES_GETTIMEOFFSET
  365. select NEED_MACH_MEMORY_H
  366. help
  367. This enables support for the Cirrus EP93xx series of CPUs.
  368. config ARCH_FOOTBRIDGE
  369. bool "FootBridge"
  370. select CPU_SA110
  371. select FOOTBRIDGE
  372. select GENERIC_CLOCKEVENTS
  373. select HAVE_IDE
  374. select NEED_MACH_IO_H
  375. select NEED_MACH_MEMORY_H
  376. help
  377. Support for systems based on the DC21285 companion chip
  378. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  379. config ARCH_MXC
  380. bool "Freescale MXC/iMX-based"
  381. select GENERIC_CLOCKEVENTS
  382. select ARCH_REQUIRE_GPIOLIB
  383. select CLKDEV_LOOKUP
  384. select CLKSRC_MMIO
  385. select GENERIC_IRQ_CHIP
  386. select MULTI_IRQ_HANDLER
  387. select SPARSE_IRQ
  388. select USE_OF
  389. help
  390. Support for Freescale MXC/iMX-based family of processors
  391. config ARCH_MXS
  392. bool "Freescale MXS-based"
  393. select GENERIC_CLOCKEVENTS
  394. select ARCH_REQUIRE_GPIOLIB
  395. select CLKDEV_LOOKUP
  396. select CLKSRC_MMIO
  397. select COMMON_CLK
  398. select HAVE_CLK_PREPARE
  399. select PINCTRL
  400. select USE_OF
  401. help
  402. Support for Freescale MXS-based family of processors
  403. config ARCH_NETX
  404. bool "Hilscher NetX based"
  405. select CLKSRC_MMIO
  406. select CPU_ARM926T
  407. select ARM_VIC
  408. select GENERIC_CLOCKEVENTS
  409. help
  410. This enables support for systems based on the Hilscher NetX Soc
  411. config ARCH_H720X
  412. bool "Hynix HMS720x-based"
  413. select CPU_ARM720T
  414. select ISA_DMA_API
  415. select ARCH_USES_GETTIMEOFFSET
  416. help
  417. This enables support for systems based on the Hynix HMS720x
  418. config ARCH_IOP13XX
  419. bool "IOP13xx-based"
  420. depends on MMU
  421. select CPU_XSC3
  422. select PLAT_IOP
  423. select PCI
  424. select ARCH_SUPPORTS_MSI
  425. select VMSPLIT_1G
  426. select NEED_MACH_IO_H
  427. select NEED_MACH_MEMORY_H
  428. select NEED_RET_TO_USER
  429. help
  430. Support for Intel's IOP13XX (XScale) family of processors.
  431. config ARCH_IOP32X
  432. bool "IOP32x-based"
  433. depends on MMU
  434. select CPU_XSCALE
  435. select NEED_MACH_IO_H
  436. select NEED_RET_TO_USER
  437. select PLAT_IOP
  438. select PCI
  439. select ARCH_REQUIRE_GPIOLIB
  440. help
  441. Support for Intel's 80219 and IOP32X (XScale) family of
  442. processors.
  443. config ARCH_IOP33X
  444. bool "IOP33x-based"
  445. depends on MMU
  446. select CPU_XSCALE
  447. select NEED_MACH_IO_H
  448. select NEED_RET_TO_USER
  449. select PLAT_IOP
  450. select PCI
  451. select ARCH_REQUIRE_GPIOLIB
  452. help
  453. Support for Intel's IOP33X (XScale) family of processors.
  454. config ARCH_IXP4XX
  455. bool "IXP4xx-based"
  456. depends on MMU
  457. select ARCH_HAS_DMA_SET_COHERENT_MASK
  458. select CLKSRC_MMIO
  459. select CPU_XSCALE
  460. select ARCH_REQUIRE_GPIOLIB
  461. select GENERIC_CLOCKEVENTS
  462. select MIGHT_HAVE_PCI
  463. select NEED_MACH_IO_H
  464. select DMABOUNCE if PCI
  465. help
  466. Support for Intel's IXP4XX (XScale) family of processors.
  467. config ARCH_DOVE
  468. bool "Marvell Dove"
  469. select CPU_V7
  470. select PCI
  471. select ARCH_REQUIRE_GPIOLIB
  472. select GENERIC_CLOCKEVENTS
  473. select NEED_MACH_IO_H
  474. select PLAT_ORION
  475. help
  476. Support for the Marvell Dove SoC 88AP510
  477. config ARCH_KIRKWOOD
  478. bool "Marvell Kirkwood"
  479. select CPU_FEROCEON
  480. select PCI
  481. select ARCH_REQUIRE_GPIOLIB
  482. select GENERIC_CLOCKEVENTS
  483. select NEED_MACH_IO_H
  484. select PLAT_ORION
  485. help
  486. Support for the following Marvell Kirkwood series SoCs:
  487. 88F6180, 88F6192 and 88F6281.
  488. config ARCH_LPC32XX
  489. bool "NXP LPC32XX"
  490. select CLKSRC_MMIO
  491. select CPU_ARM926T
  492. select ARCH_REQUIRE_GPIOLIB
  493. select HAVE_IDE
  494. select ARM_AMBA
  495. select USB_ARCH_HAS_OHCI
  496. select CLKDEV_LOOKUP
  497. select GENERIC_CLOCKEVENTS
  498. select USE_OF
  499. help
  500. Support for the NXP LPC32XX family of processors
  501. config ARCH_MV78XX0
  502. bool "Marvell MV78xx0"
  503. select CPU_FEROCEON
  504. select PCI
  505. select ARCH_REQUIRE_GPIOLIB
  506. select GENERIC_CLOCKEVENTS
  507. select NEED_MACH_IO_H
  508. select PLAT_ORION
  509. help
  510. Support for the following Marvell MV78xx0 series SoCs:
  511. MV781x0, MV782x0.
  512. config ARCH_ORION5X
  513. bool "Marvell Orion"
  514. depends on MMU
  515. select CPU_FEROCEON
  516. select PCI
  517. select ARCH_REQUIRE_GPIOLIB
  518. select GENERIC_CLOCKEVENTS
  519. select NEED_MACH_IO_H
  520. select PLAT_ORION
  521. help
  522. Support for the following Marvell Orion 5x series SoCs:
  523. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  524. Orion-2 (5281), Orion-1-90 (6183).
  525. config ARCH_MMP
  526. bool "Marvell PXA168/910/MMP2"
  527. depends on MMU
  528. select ARCH_REQUIRE_GPIOLIB
  529. select CLKDEV_LOOKUP
  530. select GENERIC_CLOCKEVENTS
  531. select GPIO_PXA
  532. select IRQ_DOMAIN
  533. select PLAT_PXA
  534. select SPARSE_IRQ
  535. select GENERIC_ALLOCATOR
  536. help
  537. Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
  538. config ARCH_KS8695
  539. bool "Micrel/Kendin KS8695"
  540. select CPU_ARM922T
  541. select ARCH_REQUIRE_GPIOLIB
  542. select ARCH_USES_GETTIMEOFFSET
  543. select NEED_MACH_MEMORY_H
  544. help
  545. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  546. System-on-Chip devices.
  547. config ARCH_W90X900
  548. bool "Nuvoton W90X900 CPU"
  549. select CPU_ARM926T
  550. select ARCH_REQUIRE_GPIOLIB
  551. select CLKDEV_LOOKUP
  552. select CLKSRC_MMIO
  553. select GENERIC_CLOCKEVENTS
  554. help
  555. Support for Nuvoton (Winbond logic dept.) ARM9 processor,
  556. At present, the w90x900 has been renamed nuc900, regarding
  557. the ARM series product line, you can login the following
  558. link address to know more.
  559. <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
  560. ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
  561. config ARCH_TEGRA
  562. bool "NVIDIA Tegra"
  563. select CLKDEV_LOOKUP
  564. select CLKSRC_MMIO
  565. select GENERIC_CLOCKEVENTS
  566. select GENERIC_GPIO
  567. select HAVE_CLK
  568. select HAVE_SMP
  569. select MIGHT_HAVE_CACHE_L2X0
  570. select NEED_MACH_IO_H if PCI
  571. select ARCH_HAS_CPUFREQ
  572. help
  573. This enables support for NVIDIA Tegra based systems (Tegra APX,
  574. Tegra 6xx and Tegra 2 series).
  575. config ARCH_PICOXCELL
  576. bool "Picochip picoXcell"
  577. select ARCH_REQUIRE_GPIOLIB
  578. select ARM_PATCH_PHYS_VIRT
  579. select ARM_VIC
  580. select CPU_V6K
  581. select DW_APB_TIMER
  582. select GENERIC_CLOCKEVENTS
  583. select GENERIC_GPIO
  584. select HAVE_TCM
  585. select NO_IOPORT
  586. select SPARSE_IRQ
  587. select USE_OF
  588. help
  589. This enables support for systems based on the Picochip picoXcell
  590. family of Femtocell devices. The picoxcell support requires device tree
  591. for all boards.
  592. config ARCH_PNX4008
  593. bool "Philips Nexperia PNX4008 Mobile"
  594. select CPU_ARM926T
  595. select CLKDEV_LOOKUP
  596. select ARCH_USES_GETTIMEOFFSET
  597. help
  598. This enables support for Philips PNX4008 mobile platform.
  599. config ARCH_PXA
  600. bool "PXA2xx/PXA3xx-based"
  601. depends on MMU
  602. select ARCH_MTD_XIP
  603. select ARCH_HAS_CPUFREQ
  604. select CLKDEV_LOOKUP
  605. select CLKSRC_MMIO
  606. select ARCH_REQUIRE_GPIOLIB
  607. select GENERIC_CLOCKEVENTS
  608. select GPIO_PXA
  609. select PLAT_PXA
  610. select SPARSE_IRQ
  611. select AUTO_ZRELADDR
  612. select MULTI_IRQ_HANDLER
  613. select ARM_CPU_SUSPEND if PM
  614. select HAVE_IDE
  615. help
  616. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  617. config ARCH_MSM
  618. bool "Qualcomm MSM"
  619. select HAVE_CLK
  620. select GENERIC_CLOCKEVENTS
  621. select ARCH_REQUIRE_GPIOLIB
  622. select CLKDEV_LOOKUP
  623. help
  624. Support for Qualcomm MSM/QSD based systems. This runs on the
  625. apps processor of the MSM/QSD and depends on a shared memory
  626. interface to the modem processor which runs the baseband
  627. stack and controls some vital subsystems
  628. (clock and power control, etc).
  629. config ARCH_SHMOBILE
  630. bool "Renesas SH-Mobile / R-Mobile"
  631. select HAVE_CLK
  632. select CLKDEV_LOOKUP
  633. select HAVE_MACH_CLKDEV
  634. select HAVE_SMP
  635. select GENERIC_CLOCKEVENTS
  636. select MIGHT_HAVE_CACHE_L2X0
  637. select NO_IOPORT
  638. select SPARSE_IRQ
  639. select MULTI_IRQ_HANDLER
  640. select PM_GENERIC_DOMAINS if PM
  641. select NEED_MACH_MEMORY_H
  642. help
  643. Support for Renesas's SH-Mobile and R-Mobile ARM platforms.
  644. config ARCH_RPC
  645. bool "RiscPC"
  646. select ARCH_ACORN
  647. select FIQ
  648. select ARCH_MAY_HAVE_PC_FDC
  649. select HAVE_PATA_PLATFORM
  650. select ISA_DMA_API
  651. select NO_IOPORT
  652. select ARCH_SPARSEMEM_ENABLE
  653. select ARCH_USES_GETTIMEOFFSET
  654. select HAVE_IDE
  655. select NEED_MACH_IO_H
  656. select NEED_MACH_MEMORY_H
  657. help
  658. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  659. CD-ROM interface, serial and parallel port, and the floppy drive.
  660. config ARCH_SA1100
  661. bool "SA1100-based"
  662. select CLKSRC_MMIO
  663. select CPU_SA1100
  664. select ISA
  665. select ARCH_SPARSEMEM_ENABLE
  666. select ARCH_MTD_XIP
  667. select ARCH_HAS_CPUFREQ
  668. select CPU_FREQ
  669. select GENERIC_CLOCKEVENTS
  670. select CLKDEV_LOOKUP
  671. select ARCH_REQUIRE_GPIOLIB
  672. select HAVE_IDE
  673. select NEED_MACH_MEMORY_H
  674. select SPARSE_IRQ
  675. help
  676. Support for StrongARM 11x0 based boards.
  677. config ARCH_S3C24XX
  678. bool "Samsung S3C24XX SoCs"
  679. select GENERIC_GPIO
  680. select ARCH_HAS_CPUFREQ
  681. select HAVE_CLK
  682. select CLKDEV_LOOKUP
  683. select ARCH_USES_GETTIMEOFFSET
  684. select HAVE_S3C2410_I2C if I2C
  685. select HAVE_S3C_RTC if RTC_CLASS
  686. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  687. select NEED_MACH_IO_H
  688. help
  689. Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443
  690. and S3C2450 SoCs based systems, such as the Simtec Electronics BAST
  691. (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or the
  692. Samsung SMDK2410 development board (and derivatives).
  693. config ARCH_S3C64XX
  694. bool "Samsung S3C64XX"
  695. select PLAT_SAMSUNG
  696. select CPU_V6
  697. select ARM_VIC
  698. select HAVE_CLK
  699. select HAVE_TCM
  700. select CLKDEV_LOOKUP
  701. select NO_IOPORT
  702. select ARCH_USES_GETTIMEOFFSET
  703. select ARCH_HAS_CPUFREQ
  704. select ARCH_REQUIRE_GPIOLIB
  705. select SAMSUNG_CLKSRC
  706. select SAMSUNG_IRQ_VIC_TIMER
  707. select S3C_GPIO_TRACK
  708. select S3C_DEV_NAND
  709. select USB_ARCH_HAS_OHCI
  710. select SAMSUNG_GPIOLIB_4BIT
  711. select HAVE_S3C2410_I2C if I2C
  712. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  713. help
  714. Samsung S3C64XX series based systems
  715. config ARCH_S5P64X0
  716. bool "Samsung S5P6440 S5P6450"
  717. select CPU_V6
  718. select GENERIC_GPIO
  719. select HAVE_CLK
  720. select CLKDEV_LOOKUP
  721. select CLKSRC_MMIO
  722. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  723. select GENERIC_CLOCKEVENTS
  724. select HAVE_S3C2410_I2C if I2C
  725. select HAVE_S3C_RTC if RTC_CLASS
  726. help
  727. Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
  728. SMDK6450.
  729. config ARCH_S5PC100
  730. bool "Samsung S5PC100"
  731. select GENERIC_GPIO
  732. select HAVE_CLK
  733. select CLKDEV_LOOKUP
  734. select CPU_V7
  735. select ARCH_USES_GETTIMEOFFSET
  736. select HAVE_S3C2410_I2C if I2C
  737. select HAVE_S3C_RTC if RTC_CLASS
  738. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  739. help
  740. Samsung S5PC100 series based systems
  741. config ARCH_S5PV210
  742. bool "Samsung S5PV210/S5PC110"
  743. select CPU_V7
  744. select ARCH_SPARSEMEM_ENABLE
  745. select ARCH_HAS_HOLES_MEMORYMODEL
  746. select GENERIC_GPIO
  747. select HAVE_CLK
  748. select CLKDEV_LOOKUP
  749. select CLKSRC_MMIO
  750. select ARCH_HAS_CPUFREQ
  751. select GENERIC_CLOCKEVENTS
  752. select HAVE_S3C2410_I2C if I2C
  753. select HAVE_S3C_RTC if RTC_CLASS
  754. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  755. select NEED_MACH_MEMORY_H
  756. help
  757. Samsung S5PV210/S5PC110 series based systems
  758. config ARCH_EXYNOS
  759. bool "SAMSUNG EXYNOS"
  760. select CPU_V7
  761. select ARCH_SPARSEMEM_ENABLE
  762. select ARCH_HAS_HOLES_MEMORYMODEL
  763. select GENERIC_GPIO
  764. select HAVE_CLK
  765. select CLKDEV_LOOKUP
  766. select ARCH_HAS_CPUFREQ
  767. select GENERIC_CLOCKEVENTS
  768. select HAVE_S3C_RTC if RTC_CLASS
  769. select HAVE_S3C2410_I2C if I2C
  770. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  771. select NEED_MACH_MEMORY_H
  772. help
  773. Support for SAMSUNG's EXYNOS SoCs (EXYNOS4/5)
  774. config ARCH_SHARK
  775. bool "Shark"
  776. select CPU_SA110
  777. select ISA
  778. select ISA_DMA
  779. select ZONE_DMA
  780. select PCI
  781. select ARCH_USES_GETTIMEOFFSET
  782. select NEED_MACH_MEMORY_H
  783. select NEED_MACH_IO_H
  784. help
  785. Support for the StrongARM based Digital DNARD machine, also known
  786. as "Shark" (<http://www.shark-linux.de/shark.html>).
  787. config ARCH_U300
  788. bool "ST-Ericsson U300 Series"
  789. depends on MMU
  790. select CLKSRC_MMIO
  791. select CPU_ARM926T
  792. select HAVE_TCM
  793. select ARM_AMBA
  794. select ARM_PATCH_PHYS_VIRT
  795. select ARM_VIC
  796. select GENERIC_CLOCKEVENTS
  797. select CLKDEV_LOOKUP
  798. select HAVE_MACH_CLKDEV
  799. select GENERIC_GPIO
  800. select ARCH_REQUIRE_GPIOLIB
  801. help
  802. Support for ST-Ericsson U300 series mobile platforms.
  803. config ARCH_U8500
  804. bool "ST-Ericsson U8500 Series"
  805. depends on MMU
  806. select CPU_V7
  807. select ARM_AMBA
  808. select GENERIC_CLOCKEVENTS
  809. select CLKDEV_LOOKUP
  810. select ARCH_REQUIRE_GPIOLIB
  811. select ARCH_HAS_CPUFREQ
  812. select HAVE_SMP
  813. select MIGHT_HAVE_CACHE_L2X0
  814. help
  815. Support for ST-Ericsson's Ux500 architecture
  816. config ARCH_NOMADIK
  817. bool "STMicroelectronics Nomadik"
  818. select ARM_AMBA
  819. select ARM_VIC
  820. select CPU_ARM926T
  821. select CLKDEV_LOOKUP
  822. select GENERIC_CLOCKEVENTS
  823. select PINCTRL
  824. select MIGHT_HAVE_CACHE_L2X0
  825. select ARCH_REQUIRE_GPIOLIB
  826. help
  827. Support for the Nomadik platform by ST-Ericsson
  828. config ARCH_DAVINCI
  829. bool "TI DaVinci"
  830. select GENERIC_CLOCKEVENTS
  831. select ARCH_REQUIRE_GPIOLIB
  832. select ZONE_DMA
  833. select HAVE_IDE
  834. select CLKDEV_LOOKUP
  835. select GENERIC_ALLOCATOR
  836. select GENERIC_IRQ_CHIP
  837. select ARCH_HAS_HOLES_MEMORYMODEL
  838. help
  839. Support for TI's DaVinci platform.
  840. config ARCH_OMAP
  841. bool "TI OMAP"
  842. select HAVE_CLK
  843. select ARCH_REQUIRE_GPIOLIB
  844. select ARCH_HAS_CPUFREQ
  845. select CLKSRC_MMIO
  846. select GENERIC_CLOCKEVENTS
  847. select ARCH_HAS_HOLES_MEMORYMODEL
  848. help
  849. Support for TI's OMAP platform (OMAP1/2/3/4).
  850. config PLAT_SPEAR
  851. bool "ST SPEAr"
  852. select ARM_AMBA
  853. select ARCH_REQUIRE_GPIOLIB
  854. select CLKDEV_LOOKUP
  855. select COMMON_CLK
  856. select CLKSRC_MMIO
  857. select GENERIC_CLOCKEVENTS
  858. select HAVE_CLK
  859. help
  860. Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
  861. config ARCH_VT8500
  862. bool "VIA/WonderMedia 85xx"
  863. select CPU_ARM926T
  864. select GENERIC_GPIO
  865. select ARCH_HAS_CPUFREQ
  866. select GENERIC_CLOCKEVENTS
  867. select ARCH_REQUIRE_GPIOLIB
  868. select HAVE_PWM
  869. help
  870. Support for VIA/WonderMedia VT8500/WM85xx System-on-Chip.
  871. config ARCH_ZYNQ
  872. bool "Xilinx Zynq ARM Cortex A9 Platform"
  873. select CPU_V7
  874. select GENERIC_CLOCKEVENTS
  875. select CLKDEV_LOOKUP
  876. select ARM_GIC
  877. select ARM_AMBA
  878. select ICST
  879. select MIGHT_HAVE_CACHE_L2X0
  880. select USE_OF
  881. help
  882. Support for Xilinx Zynq ARM Cortex A9 Platform
  883. endchoice
  884. #
  885. # This is sorted alphabetically by mach-* pathname. However, plat-*
  886. # Kconfigs may be included either alphabetically (according to the
  887. # plat- suffix) or along side the corresponding mach-* source.
  888. #
  889. source "arch/arm/mach-at91/Kconfig"
  890. source "arch/arm/mach-bcmring/Kconfig"
  891. source "arch/arm/mach-clps711x/Kconfig"
  892. source "arch/arm/mach-cns3xxx/Kconfig"
  893. source "arch/arm/mach-davinci/Kconfig"
  894. source "arch/arm/mach-dove/Kconfig"
  895. source "arch/arm/mach-ep93xx/Kconfig"
  896. source "arch/arm/mach-footbridge/Kconfig"
  897. source "arch/arm/mach-gemini/Kconfig"
  898. source "arch/arm/mach-h720x/Kconfig"
  899. source "arch/arm/mach-integrator/Kconfig"
  900. source "arch/arm/mach-iop32x/Kconfig"
  901. source "arch/arm/mach-iop33x/Kconfig"
  902. source "arch/arm/mach-iop13xx/Kconfig"
  903. source "arch/arm/mach-ixp4xx/Kconfig"
  904. source "arch/arm/mach-kirkwood/Kconfig"
  905. source "arch/arm/mach-ks8695/Kconfig"
  906. source "arch/arm/mach-lpc32xx/Kconfig"
  907. source "arch/arm/mach-msm/Kconfig"
  908. source "arch/arm/mach-mv78xx0/Kconfig"
  909. source "arch/arm/plat-mxc/Kconfig"
  910. source "arch/arm/mach-mxs/Kconfig"
  911. source "arch/arm/mach-netx/Kconfig"
  912. source "arch/arm/mach-nomadik/Kconfig"
  913. source "arch/arm/plat-nomadik/Kconfig"
  914. source "arch/arm/plat-omap/Kconfig"
  915. source "arch/arm/mach-omap1/Kconfig"
  916. source "arch/arm/mach-omap2/Kconfig"
  917. source "arch/arm/mach-orion5x/Kconfig"
  918. source "arch/arm/mach-pxa/Kconfig"
  919. source "arch/arm/plat-pxa/Kconfig"
  920. source "arch/arm/mach-mmp/Kconfig"
  921. source "arch/arm/mach-realview/Kconfig"
  922. source "arch/arm/mach-sa1100/Kconfig"
  923. source "arch/arm/plat-samsung/Kconfig"
  924. source "arch/arm/plat-s3c24xx/Kconfig"
  925. source "arch/arm/plat-spear/Kconfig"
  926. source "arch/arm/mach-s3c24xx/Kconfig"
  927. if ARCH_S3C24XX
  928. source "arch/arm/mach-s3c2412/Kconfig"
  929. source "arch/arm/mach-s3c2440/Kconfig"
  930. endif
  931. if ARCH_S3C64XX
  932. source "arch/arm/mach-s3c64xx/Kconfig"
  933. endif
  934. source "arch/arm/mach-s5p64x0/Kconfig"
  935. source "arch/arm/mach-s5pc100/Kconfig"
  936. source "arch/arm/mach-s5pv210/Kconfig"
  937. source "arch/arm/mach-exynos/Kconfig"
  938. source "arch/arm/mach-shmobile/Kconfig"
  939. source "arch/arm/mach-tegra/Kconfig"
  940. source "arch/arm/mach-u300/Kconfig"
  941. source "arch/arm/mach-ux500/Kconfig"
  942. source "arch/arm/mach-versatile/Kconfig"
  943. source "arch/arm/mach-vexpress/Kconfig"
  944. source "arch/arm/plat-versatile/Kconfig"
  945. source "arch/arm/mach-vt8500/Kconfig"
  946. source "arch/arm/mach-w90x900/Kconfig"
  947. # Definitions to make life easier
  948. config ARCH_ACORN
  949. bool
  950. config PLAT_IOP
  951. bool
  952. select GENERIC_CLOCKEVENTS
  953. config PLAT_ORION
  954. bool
  955. select CLKSRC_MMIO
  956. select GENERIC_IRQ_CHIP
  957. select COMMON_CLK
  958. config PLAT_PXA
  959. bool
  960. config PLAT_VERSATILE
  961. bool
  962. config ARM_TIMER_SP804
  963. bool
  964. select CLKSRC_MMIO
  965. select HAVE_SCHED_CLOCK
  966. source arch/arm/mm/Kconfig
  967. config ARM_NR_BANKS
  968. int
  969. default 16 if ARCH_EP93XX
  970. default 8
  971. config IWMMXT
  972. bool "Enable iWMMXt support"
  973. depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
  974. default y if PXA27x || PXA3xx || PXA95x || ARCH_MMP
  975. help
  976. Enable support for iWMMXt context switching at run time if
  977. running on a CPU that supports it.
  978. config XSCALE_PMU
  979. bool
  980. depends on CPU_XSCALE
  981. default y
  982. config CPU_HAS_PMU
  983. depends on (CPU_V6 || CPU_V6K || CPU_V7 || XSCALE_PMU) && \
  984. (!ARCH_OMAP3 || OMAP3_EMU)
  985. default y
  986. bool
  987. config MULTI_IRQ_HANDLER
  988. bool
  989. help
  990. Allow each machine to specify it's own IRQ handler at run time.
  991. if !MMU
  992. source "arch/arm/Kconfig-nommu"
  993. endif
  994. config ARM_ERRATA_326103
  995. bool "ARM errata: FSR write bit incorrect on a SWP to read-only memory"
  996. depends on CPU_V6
  997. help
  998. Executing a SWP instruction to read-only memory does not set bit 11
  999. of the FSR on the ARM 1136 prior to r1p0. This causes the kernel to
  1000. treat the access as a read, preventing a COW from occurring and
  1001. causing the faulting task to livelock.
  1002. config ARM_ERRATA_411920
  1003. bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
  1004. depends on CPU_V6 || CPU_V6K
  1005. help
  1006. Invalidation of the Instruction Cache operation can
  1007. fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
  1008. It does not affect the MPCore. This option enables the ARM Ltd.
  1009. recommended workaround.
  1010. config ARM_ERRATA_430973
  1011. bool "ARM errata: Stale prediction on replaced interworking branch"
  1012. depends on CPU_V7
  1013. help
  1014. This option enables the workaround for the 430973 Cortex-A8
  1015. (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
  1016. interworking branch is replaced with another code sequence at the
  1017. same virtual address, whether due to self-modifying code or virtual
  1018. to physical address re-mapping, Cortex-A8 does not recover from the
  1019. stale interworking branch prediction. This results in Cortex-A8
  1020. executing the new code sequence in the incorrect ARM or Thumb state.
  1021. The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
  1022. and also flushes the branch target cache at every context switch.
  1023. Note that setting specific bits in the ACTLR register may not be
  1024. available in non-secure mode.
  1025. config ARM_ERRATA_458693
  1026. bool "ARM errata: Processor deadlock when a false hazard is created"
  1027. depends on CPU_V7
  1028. help
  1029. This option enables the workaround for the 458693 Cortex-A8 (r2p0)
  1030. erratum. For very specific sequences of memory operations, it is
  1031. possible for a hazard condition intended for a cache line to instead
  1032. be incorrectly associated with a different cache line. This false
  1033. hazard might then cause a processor deadlock. The workaround enables
  1034. the L1 caching of the NEON accesses and disables the PLD instruction
  1035. in the ACTLR register. Note that setting specific bits in the ACTLR
  1036. register may not be available in non-secure mode.
  1037. config ARM_ERRATA_460075
  1038. bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
  1039. depends on CPU_V7
  1040. help
  1041. This option enables the workaround for the 460075 Cortex-A8 (r2p0)
  1042. erratum. Any asynchronous access to the L2 cache may encounter a
  1043. situation in which recent store transactions to the L2 cache are lost
  1044. and overwritten with stale memory contents from external memory. The
  1045. workaround disables the write-allocate mode for the L2 cache via the
  1046. ACTLR register. Note that setting specific bits in the ACTLR register
  1047. may not be available in non-secure mode.
  1048. config ARM_ERRATA_742230
  1049. bool "ARM errata: DMB operation may be faulty"
  1050. depends on CPU_V7 && SMP
  1051. help
  1052. This option enables the workaround for the 742230 Cortex-A9
  1053. (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
  1054. between two write operations may not ensure the correct visibility
  1055. ordering of the two writes. This workaround sets a specific bit in
  1056. the diagnostic register of the Cortex-A9 which causes the DMB
  1057. instruction to behave as a DSB, ensuring the correct behaviour of
  1058. the two writes.
  1059. config ARM_ERRATA_742231
  1060. bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
  1061. depends on CPU_V7 && SMP
  1062. help
  1063. This option enables the workaround for the 742231 Cortex-A9
  1064. (r2p0..r2p2) erratum. Under certain conditions, specific to the
  1065. Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
  1066. accessing some data located in the same cache line, may get corrupted
  1067. data due to bad handling of the address hazard when the line gets
  1068. replaced from one of the CPUs at the same time as another CPU is
  1069. accessing it. This workaround sets specific bits in the diagnostic
  1070. register of the Cortex-A9 which reduces the linefill issuing
  1071. capabilities of the processor.
  1072. config PL310_ERRATA_588369
  1073. bool "PL310 errata: Clean & Invalidate maintenance operations do not invalidate clean lines"
  1074. depends on CACHE_L2X0
  1075. help
  1076. The PL310 L2 cache controller implements three types of Clean &
  1077. Invalidate maintenance operations: by Physical Address
  1078. (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
  1079. They are architecturally defined to behave as the execution of a
  1080. clean operation followed immediately by an invalidate operation,
  1081. both performing to the same memory location. This functionality
  1082. is not correctly implemented in PL310 as clean lines are not
  1083. invalidated as a result of these operations.
  1084. config ARM_ERRATA_720789
  1085. bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
  1086. depends on CPU_V7
  1087. help
  1088. This option enables the workaround for the 720789 Cortex-A9 (prior to
  1089. r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
  1090. broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
  1091. As a consequence of this erratum, some TLB entries which should be
  1092. invalidated are not, resulting in an incoherency in the system page
  1093. tables. The workaround changes the TLB flushing routines to invalidate
  1094. entries regardless of the ASID.
  1095. config PL310_ERRATA_727915
  1096. bool "PL310 errata: Background Clean & Invalidate by Way operation can cause data corruption"
  1097. depends on CACHE_L2X0
  1098. help
  1099. PL310 implements the Clean & Invalidate by Way L2 cache maintenance
  1100. operation (offset 0x7FC). This operation runs in background so that
  1101. PL310 can handle normal accesses while it is in progress. Under very
  1102. rare circumstances, due to this erratum, write data can be lost when
  1103. PL310 treats a cacheable write transaction during a Clean &
  1104. Invalidate by Way operation.
  1105. config ARM_ERRATA_743622
  1106. bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
  1107. depends on CPU_V7
  1108. help
  1109. This option enables the workaround for the 743622 Cortex-A9
  1110. (r2p*) erratum. Under very rare conditions, a faulty
  1111. optimisation in the Cortex-A9 Store Buffer may lead to data
  1112. corruption. This workaround sets a specific bit in the diagnostic
  1113. register of the Cortex-A9 which disables the Store Buffer
  1114. optimisation, preventing the defect from occurring. This has no
  1115. visible impact on the overall performance or power consumption of the
  1116. processor.
  1117. config ARM_ERRATA_751472
  1118. bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
  1119. depends on CPU_V7
  1120. help
  1121. This option enables the workaround for the 751472 Cortex-A9 (prior
  1122. to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
  1123. completion of a following broadcasted operation if the second
  1124. operation is received by a CPU before the ICIALLUIS has completed,
  1125. potentially leading to corrupted entries in the cache or TLB.
  1126. config PL310_ERRATA_753970
  1127. bool "PL310 errata: cache sync operation may be faulty"
  1128. depends on CACHE_PL310
  1129. help
  1130. This option enables the workaround for the 753970 PL310 (r3p0) erratum.
  1131. Under some condition the effect of cache sync operation on
  1132. the store buffer still remains when the operation completes.
  1133. This means that the store buffer is always asked to drain and
  1134. this prevents it from merging any further writes. The workaround
  1135. is to replace the normal offset of cache sync operation (0x730)
  1136. by another offset targeting an unmapped PL310 register 0x740.
  1137. This has the same effect as the cache sync operation: store buffer
  1138. drain and waiting for all buffers empty.
  1139. config ARM_ERRATA_754322
  1140. bool "ARM errata: possible faulty MMU translations following an ASID switch"
  1141. depends on CPU_V7
  1142. help
  1143. This option enables the workaround for the 754322 Cortex-A9 (r2p*,
  1144. r3p*) erratum. A speculative memory access may cause a page table walk
  1145. which starts prior to an ASID switch but completes afterwards. This
  1146. can populate the micro-TLB with a stale entry which may be hit with
  1147. the new ASID. This workaround places two dsb instructions in the mm
  1148. switching code so that no page table walks can cross the ASID switch.
  1149. config ARM_ERRATA_754327
  1150. bool "ARM errata: no automatic Store Buffer drain"
  1151. depends on CPU_V7 && SMP
  1152. help
  1153. This option enables the workaround for the 754327 Cortex-A9 (prior to
  1154. r2p0) erratum. The Store Buffer does not have any automatic draining
  1155. mechanism and therefore a livelock may occur if an external agent
  1156. continuously polls a memory location waiting to observe an update.
  1157. This workaround defines cpu_relax() as smp_mb(), preventing correctly
  1158. written polling loops from denying visibility of updates to memory.
  1159. config ARM_ERRATA_364296
  1160. bool "ARM errata: Possible cache data corruption with hit-under-miss enabled"
  1161. depends on CPU_V6 && !SMP
  1162. help
  1163. This options enables the workaround for the 364296 ARM1136
  1164. r0p2 erratum (possible cache data corruption with
  1165. hit-under-miss enabled). It sets the undocumented bit 31 in
  1166. the auxiliary control register and the FI bit in the control
  1167. register, thus disabling hit-under-miss without putting the
  1168. processor into full low interrupt latency mode. ARM11MPCore
  1169. is not affected.
  1170. config ARM_ERRATA_764369
  1171. bool "ARM errata: Data cache line maintenance operation by MVA may not succeed"
  1172. depends on CPU_V7 && SMP
  1173. help
  1174. This option enables the workaround for erratum 764369
  1175. affecting Cortex-A9 MPCore with two or more processors (all
  1176. current revisions). Under certain timing circumstances, a data
  1177. cache line maintenance operation by MVA targeting an Inner
  1178. Shareable memory region may fail to proceed up to either the
  1179. Point of Coherency or to the Point of Unification of the
  1180. system. This workaround adds a DSB instruction before the
  1181. relevant cache maintenance functions and sets a specific bit
  1182. in the diagnostic control register of the SCU.
  1183. config PL310_ERRATA_769419
  1184. bool "PL310 errata: no automatic Store Buffer drain"
  1185. depends on CACHE_L2X0
  1186. help
  1187. On revisions of the PL310 prior to r3p2, the Store Buffer does
  1188. not automatically drain. This can cause normal, non-cacheable
  1189. writes to be retained when the memory system is idle, leading
  1190. to suboptimal I/O performance for drivers using coherent DMA.
  1191. This option adds a write barrier to the cpu_idle loop so that,
  1192. on systems with an outer cache, the store buffer is drained
  1193. explicitly.
  1194. endmenu
  1195. source "arch/arm/common/Kconfig"
  1196. menu "Bus support"
  1197. config ARM_AMBA
  1198. bool
  1199. config ISA
  1200. bool
  1201. help
  1202. Find out whether you have ISA slots on your motherboard. ISA is the
  1203. name of a bus system, i.e. the way the CPU talks to the other stuff
  1204. inside your box. Other bus systems are PCI, EISA, MicroChannel
  1205. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  1206. newer boards don't support it. If you have ISA, say Y, otherwise N.
  1207. # Select ISA DMA controller support
  1208. config ISA_DMA
  1209. bool
  1210. select ISA_DMA_API
  1211. # Select ISA DMA interface
  1212. config ISA_DMA_API
  1213. bool
  1214. config PCI
  1215. bool "PCI support" if MIGHT_HAVE_PCI
  1216. help
  1217. Find out whether you have a PCI motherboard. PCI is the name of a
  1218. bus system, i.e. the way the CPU talks to the other stuff inside
  1219. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  1220. VESA. If you have PCI, say Y, otherwise N.
  1221. config PCI_DOMAINS
  1222. bool
  1223. depends on PCI
  1224. config PCI_NANOENGINE
  1225. bool "BSE nanoEngine PCI support"
  1226. depends on SA1100_NANOENGINE
  1227. help
  1228. Enable PCI on the BSE nanoEngine board.
  1229. config PCI_SYSCALL
  1230. def_bool PCI
  1231. # Select the host bridge type
  1232. config PCI_HOST_VIA82C505
  1233. bool
  1234. depends on PCI && ARCH_SHARK
  1235. default y
  1236. config PCI_HOST_ITE8152
  1237. bool
  1238. depends on PCI && MACH_ARMCORE
  1239. default y
  1240. select DMABOUNCE
  1241. source "drivers/pci/Kconfig"
  1242. source "drivers/pcmcia/Kconfig"
  1243. endmenu
  1244. menu "Kernel Features"
  1245. config HAVE_SMP
  1246. bool
  1247. help
  1248. This option should be selected by machines which have an SMP-
  1249. capable CPU.
  1250. The only effect of this option is to make the SMP-related
  1251. options available to the user for configuration.
  1252. config SMP
  1253. bool "Symmetric Multi-Processing"
  1254. depends on CPU_V6K || CPU_V7
  1255. depends on GENERIC_CLOCKEVENTS
  1256. depends on HAVE_SMP
  1257. depends on MMU
  1258. select USE_GENERIC_SMP_HELPERS
  1259. select HAVE_ARM_SCU if !ARCH_MSM_SCORPIONMP
  1260. help
  1261. This enables support for systems with more than one CPU. If you have
  1262. a system with only one CPU, like most personal computers, say N. If
  1263. you have a system with more than one CPU, say Y.
  1264. If you say N here, the kernel will run on single and multiprocessor
  1265. machines, but will use only one CPU of a multiprocessor machine. If
  1266. you say Y here, the kernel will run on many, but not all, single
  1267. processor machines. On a single processor machine, the kernel will
  1268. run faster if you say N here.
  1269. See also <file:Documentation/x86/i386/IO-APIC.txt>,
  1270. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  1271. <http://tldp.org/HOWTO/SMP-HOWTO.html>.
  1272. If you don't know what to do here, say N.
  1273. config SMP_ON_UP
  1274. bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
  1275. depends on EXPERIMENTAL
  1276. depends on SMP && !XIP_KERNEL
  1277. default y
  1278. help
  1279. SMP kernels contain instructions which fail on non-SMP processors.
  1280. Enabling this option allows the kernel to modify itself to make
  1281. these instructions safe. Disabling it allows about 1K of space
  1282. savings.
  1283. If you don't know what to do here, say Y.
  1284. config ARM_CPU_TOPOLOGY
  1285. bool "Support cpu topology definition"
  1286. depends on SMP && CPU_V7
  1287. default y
  1288. help
  1289. Support ARM cpu topology definition. The MPIDR register defines
  1290. affinity between processors which is then used to describe the cpu
  1291. topology of an ARM System.
  1292. config SCHED_MC
  1293. bool "Multi-core scheduler support"
  1294. depends on ARM_CPU_TOPOLOGY
  1295. help
  1296. Multi-core scheduler support improves the CPU scheduler's decision
  1297. making when dealing with multi-core CPU chips at a cost of slightly
  1298. increased overhead in some places. If unsure say N here.
  1299. config SCHED_SMT
  1300. bool "SMT scheduler support"
  1301. depends on ARM_CPU_TOPOLOGY
  1302. help
  1303. Improves the CPU scheduler's decision making when dealing with
  1304. MultiThreading at a cost of slightly increased overhead in some
  1305. places. If unsure say N here.
  1306. config HAVE_ARM_SCU
  1307. bool
  1308. help
  1309. This option enables support for the ARM system coherency unit
  1310. config ARM_ARCH_TIMER
  1311. bool "Architected timer support"
  1312. depends on CPU_V7
  1313. help
  1314. This option enables support for the ARM architected timer
  1315. config HAVE_ARM_TWD
  1316. bool
  1317. depends on SMP
  1318. help
  1319. This options enables support for the ARM timer and watchdog unit
  1320. choice
  1321. prompt "Memory split"
  1322. default VMSPLIT_3G
  1323. help
  1324. Select the desired split between kernel and user memory.
  1325. If you are not absolutely sure what you are doing, leave this
  1326. option alone!
  1327. config VMSPLIT_3G
  1328. bool "3G/1G user/kernel split"
  1329. config VMSPLIT_2G
  1330. bool "2G/2G user/kernel split"
  1331. config VMSPLIT_1G
  1332. bool "1G/3G user/kernel split"
  1333. endchoice
  1334. config PAGE_OFFSET
  1335. hex
  1336. default 0x40000000 if VMSPLIT_1G
  1337. default 0x80000000 if VMSPLIT_2G
  1338. default 0xC0000000
  1339. config NR_CPUS
  1340. int "Maximum number of CPUs (2-32)"
  1341. range 2 32
  1342. depends on SMP
  1343. default "4"
  1344. config HOTPLUG_CPU
  1345. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  1346. depends on SMP && HOTPLUG && EXPERIMENTAL
  1347. help
  1348. Say Y here to experiment with turning CPUs off and on. CPUs
  1349. can be controlled through /sys/devices/system/cpu.
  1350. config LOCAL_TIMERS
  1351. bool "Use local timer interrupts"
  1352. depends on SMP
  1353. default y
  1354. select HAVE_ARM_TWD if (!ARCH_MSM_SCORPIONMP && !EXYNOS4_MCT)
  1355. help
  1356. Enable support for local timers on SMP platforms, rather then the
  1357. legacy IPI broadcast method. Local timers allows the system
  1358. accounting to be spread across the timer interval, preventing a
  1359. "thundering herd" at every timer tick.
  1360. config ARCH_NR_GPIO
  1361. int
  1362. default 1024 if ARCH_SHMOBILE || ARCH_TEGRA
  1363. default 355 if ARCH_U8500
  1364. default 264 if MACH_H4700
  1365. default 0
  1366. help
  1367. Maximum number of GPIOs in the system.
  1368. If unsure, leave the default value.
  1369. source kernel/Kconfig.preempt
  1370. config HZ
  1371. int
  1372. default 200 if ARCH_EBSA110 || ARCH_S3C24XX || ARCH_S5P64X0 || \
  1373. ARCH_S5PV210 || ARCH_EXYNOS4
  1374. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  1375. default AT91_TIMER_HZ if ARCH_AT91
  1376. default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
  1377. default 100
  1378. config THUMB2_KERNEL
  1379. bool "Compile the kernel in Thumb-2 mode (EXPERIMENTAL)"
  1380. depends on CPU_V7 && !CPU_V6 && !CPU_V6K && EXPERIMENTAL
  1381. select AEABI
  1382. select ARM_ASM_UNIFIED
  1383. select ARM_UNWIND
  1384. help
  1385. By enabling this option, the kernel will be compiled in
  1386. Thumb-2 mode. A compiler/assembler that understand the unified
  1387. ARM-Thumb syntax is needed.
  1388. If unsure, say N.
  1389. config THUMB2_AVOID_R_ARM_THM_JUMP11
  1390. bool "Work around buggy Thumb-2 short branch relocations in gas"
  1391. depends on THUMB2_KERNEL && MODULES
  1392. default y
  1393. help
  1394. Various binutils versions can resolve Thumb-2 branches to
  1395. locally-defined, preemptible global symbols as short-range "b.n"
  1396. branch instructions.
  1397. This is a problem, because there's no guarantee the final
  1398. destination of the symbol, or any candidate locations for a
  1399. trampoline, are within range of the branch. For this reason, the
  1400. kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
  1401. relocation in modules at all, and it makes little sense to add
  1402. support.
  1403. The symptom is that the kernel fails with an "unsupported
  1404. relocation" error when loading some modules.
  1405. Until fixed tools are available, passing
  1406. -fno-optimize-sibling-calls to gcc should prevent gcc generating
  1407. code which hits this problem, at the cost of a bit of extra runtime
  1408. stack usage in some cases.
  1409. The problem is described in more detail at:
  1410. https://bugs.launchpad.net/binutils-linaro/+bug/725126
  1411. Only Thumb-2 kernels are affected.
  1412. Unless you are sure your tools don't have this problem, say Y.
  1413. config ARM_ASM_UNIFIED
  1414. bool
  1415. config AEABI
  1416. bool "Use the ARM EABI to compile the kernel"
  1417. help
  1418. This option allows for the kernel to be compiled using the latest
  1419. ARM ABI (aka EABI). This is only useful if you are using a user
  1420. space environment that is also compiled with EABI.
  1421. Since there are major incompatibilities between the legacy ABI and
  1422. EABI, especially with regard to structure member alignment, this
  1423. option also changes the kernel syscall calling convention to
  1424. disambiguate both ABIs and allow for backward compatibility support
  1425. (selected with CONFIG_OABI_COMPAT).
  1426. To use this you need GCC version 4.0.0 or later.
  1427. config OABI_COMPAT
  1428. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  1429. depends on AEABI && EXPERIMENTAL && !THUMB2_KERNEL
  1430. default y
  1431. help
  1432. This option preserves the old syscall interface along with the
  1433. new (ARM EABI) one. It also provides a compatibility layer to
  1434. intercept syscalls that have structure arguments which layout
  1435. in memory differs between the legacy ABI and the new ARM EABI
  1436. (only for non "thumb" binaries). This option adds a tiny
  1437. overhead to all syscalls and produces a slightly larger kernel.
  1438. If you know you'll be using only pure EABI user space then you
  1439. can say N here. If this option is not selected and you attempt
  1440. to execute a legacy ABI binary then the result will be
  1441. UNPREDICTABLE (in fact it can be predicted that it won't work
  1442. at all). If in doubt say Y.
  1443. config ARCH_HAS_HOLES_MEMORYMODEL
  1444. bool
  1445. config ARCH_SPARSEMEM_ENABLE
  1446. bool
  1447. config ARCH_SPARSEMEM_DEFAULT
  1448. def_bool ARCH_SPARSEMEM_ENABLE
  1449. config ARCH_SELECT_MEMORY_MODEL
  1450. def_bool ARCH_SPARSEMEM_ENABLE
  1451. config HAVE_ARCH_PFN_VALID
  1452. def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
  1453. config HIGHMEM
  1454. bool "High Memory Support"
  1455. depends on MMU
  1456. help
  1457. The address space of ARM processors is only 4 Gigabytes large
  1458. and it has to accommodate user address space, kernel address
  1459. space as well as some memory mapped IO. That means that, if you
  1460. have a large amount of physical memory and/or IO, not all of the
  1461. memory can be "permanently mapped" by the kernel. The physical
  1462. memory that is not permanently mapped is called "high memory".
  1463. Depending on the selected kernel/user memory split, minimum
  1464. vmalloc space and actual amount of RAM, you may not need this
  1465. option which should result in a slightly faster kernel.
  1466. If unsure, say n.
  1467. config HIGHPTE
  1468. bool "Allocate 2nd-level pagetables from highmem"
  1469. depends on HIGHMEM
  1470. config HW_PERF_EVENTS
  1471. bool "Enable hardware performance counter support for perf events"
  1472. depends on PERF_EVENTS && CPU_HAS_PMU
  1473. default y
  1474. help
  1475. Enable hardware performance counter support for perf events. If
  1476. disabled, perf events will use software events only.
  1477. source "mm/Kconfig"
  1478. config FORCE_MAX_ZONEORDER
  1479. int "Maximum zone order" if ARCH_SHMOBILE
  1480. range 11 64 if ARCH_SHMOBILE
  1481. default "9" if SA1111
  1482. default "11"
  1483. help
  1484. The kernel memory allocator divides physically contiguous memory
  1485. blocks into "zones", where each zone is a power of two number of
  1486. pages. This option selects the largest power of two that the kernel
  1487. keeps in the memory allocator. If you need to allocate very large
  1488. blocks of physically contiguous memory, then you may need to
  1489. increase this value.
  1490. This config option is actually maximum order plus one. For example,
  1491. a value of 11 means that the largest free memory block is 2^10 pages.
  1492. config LEDS
  1493. bool "Timer and CPU usage LEDs"
  1494. depends on ARCH_CDB89712 || ARCH_EBSA110 || \
  1495. ARCH_EBSA285 || ARCH_INTEGRATOR || \
  1496. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  1497. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  1498. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  1499. ARCH_AT91 || ARCH_DAVINCI || \
  1500. ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
  1501. help
  1502. If you say Y here, the LEDs on your machine will be used
  1503. to provide useful information about your current system status.
  1504. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  1505. be able to select which LEDs are active using the options below. If
  1506. you are compiling a kernel for the EBSA-110 or the LART however, the
  1507. red LED will simply flash regularly to indicate that the system is
  1508. still functional. It is safe to say Y here if you have a CATS
  1509. system, but the driver will do nothing.
  1510. config LEDS_TIMER
  1511. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  1512. OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1513. || MACH_OMAP_PERSEUS2
  1514. depends on LEDS
  1515. depends on !GENERIC_CLOCKEVENTS
  1516. default y if ARCH_EBSA110
  1517. help
  1518. If you say Y here, one of the system LEDs (the green one on the
  1519. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  1520. will flash regularly to indicate that the system is still
  1521. operational. This is mainly useful to kernel hackers who are
  1522. debugging unstable kernels.
  1523. The LART uses the same LED for both Timer LED and CPU usage LED
  1524. functions. You may choose to use both, but the Timer LED function
  1525. will overrule the CPU usage LED.
  1526. config LEDS_CPU
  1527. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  1528. !ARCH_OMAP) \
  1529. || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1530. || MACH_OMAP_PERSEUS2
  1531. depends on LEDS
  1532. help
  1533. If you say Y here, the red LED will be used to give a good real
  1534. time indication of CPU usage, by lighting whenever the idle task
  1535. is not currently executing.
  1536. The LART uses the same LED for both Timer LED and CPU usage LED
  1537. functions. You may choose to use both, but the Timer LED function
  1538. will overrule the CPU usage LED.
  1539. config ALIGNMENT_TRAP
  1540. bool
  1541. depends on CPU_CP15_MMU
  1542. default y if !ARCH_EBSA110
  1543. select HAVE_PROC_CPU if PROC_FS
  1544. help
  1545. ARM processors cannot fetch/store information which is not
  1546. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  1547. address divisible by 4. On 32-bit ARM processors, these non-aligned
  1548. fetch/store instructions will be emulated in software if you say
  1549. here, which has a severe performance impact. This is necessary for
  1550. correct operation of some network protocols. With an IP-only
  1551. configuration it is safe to say N, otherwise say Y.
  1552. config UACCESS_WITH_MEMCPY
  1553. bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
  1554. depends on MMU && EXPERIMENTAL
  1555. default y if CPU_FEROCEON
  1556. help
  1557. Implement faster copy_to_user and clear_user methods for CPU
  1558. cores where a 8-word STM instruction give significantly higher
  1559. memory write throughput than a sequence of individual 32bit stores.
  1560. A possible side effect is a slight increase in scheduling latency
  1561. between threads sharing the same address space if they invoke
  1562. such copy operations with large buffers.
  1563. However, if the CPU data cache is using a write-allocate mode,
  1564. this option is unlikely to provide any performance gain.
  1565. config SECCOMP
  1566. bool
  1567. prompt "Enable seccomp to safely compute untrusted bytecode"
  1568. ---help---
  1569. This kernel feature is useful for number crunching applications
  1570. that may need to compute untrusted bytecode during their
  1571. execution. By using pipes or other transports made available to
  1572. the process as file descriptors supporting the read/write
  1573. syscalls, it's possible to isolate those applications in
  1574. their own address space using seccomp. Once seccomp is
  1575. enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
  1576. and the task is only allowed to execute a few safe syscalls
  1577. defined by each seccomp mode.
  1578. config CC_STACKPROTECTOR
  1579. bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
  1580. depends on EXPERIMENTAL
  1581. help
  1582. This option turns on the -fstack-protector GCC feature. This
  1583. feature puts, at the beginning of functions, a canary value on
  1584. the stack just before the return address, and validates
  1585. the value just before actually returning. Stack based buffer
  1586. overflows (that need to overwrite this return address) now also
  1587. overwrite the canary, which gets detected and the attack is then
  1588. neutralized via a kernel panic.
  1589. This feature requires gcc version 4.2 or above.
  1590. config DEPRECATED_PARAM_STRUCT
  1591. bool "Provide old way to pass kernel parameters"
  1592. help
  1593. This was deprecated in 2001 and announced to live on for 5 years.
  1594. Some old boot loaders still use this way.
  1595. endmenu
  1596. menu "Boot options"
  1597. config USE_OF
  1598. bool "Flattened Device Tree support"
  1599. select OF
  1600. select OF_EARLY_FLATTREE
  1601. select IRQ_DOMAIN
  1602. help
  1603. Include support for flattened device tree machine descriptions.
  1604. # Compressed boot loader in ROM. Yes, we really want to ask about
  1605. # TEXT and BSS so we preserve their values in the config files.
  1606. config ZBOOT_ROM_TEXT
  1607. hex "Compressed ROM boot loader base address"
  1608. default "0"
  1609. help
  1610. The physical address at which the ROM-able zImage is to be
  1611. placed in the target. Platforms which normally make use of
  1612. ROM-able zImage formats normally set this to a suitable
  1613. value in their defconfig file.
  1614. If ZBOOT_ROM is not enabled, this has no effect.
  1615. config ZBOOT_ROM_BSS
  1616. hex "Compressed ROM boot loader BSS address"
  1617. default "0"
  1618. help
  1619. The base address of an area of read/write memory in the target
  1620. for the ROM-able zImage which must be available while the
  1621. decompressor is running. It must be large enough to hold the
  1622. entire decompressed kernel plus an additional 128 KiB.
  1623. Platforms which normally make use of ROM-able zImage formats
  1624. normally set this to a suitable value in their defconfig file.
  1625. If ZBOOT_ROM is not enabled, this has no effect.
  1626. config ZBOOT_ROM
  1627. bool "Compressed boot loader in ROM/flash"
  1628. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  1629. help
  1630. Say Y here if you intend to execute your compressed kernel image
  1631. (zImage) directly from ROM or flash. If unsure, say N.
  1632. choice
  1633. prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)"
  1634. depends on ZBOOT_ROM && ARCH_SH7372 && EXPERIMENTAL
  1635. default ZBOOT_ROM_NONE
  1636. help
  1637. Include experimental SD/MMC loading code in the ROM-able zImage.
  1638. With this enabled it is possible to write the ROM-able zImage
  1639. kernel image to an MMC or SD card and boot the kernel straight
  1640. from the reset vector. At reset the processor Mask ROM will load
  1641. the first part of the ROM-able zImage which in turn loads the
  1642. rest the kernel image to RAM.
  1643. config ZBOOT_ROM_NONE
  1644. bool "No SD/MMC loader in zImage (EXPERIMENTAL)"
  1645. help
  1646. Do not load image from SD or MMC
  1647. config ZBOOT_ROM_MMCIF
  1648. bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
  1649. help
  1650. Load image from MMCIF hardware block.
  1651. config ZBOOT_ROM_SH_MOBILE_SDHI
  1652. bool "Include SuperH Mobile SDHI loader in zImage (EXPERIMENTAL)"
  1653. help
  1654. Load image from SDHI hardware block
  1655. endchoice
  1656. config ARM_APPENDED_DTB
  1657. bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
  1658. depends on OF && !ZBOOT_ROM && EXPERIMENTAL
  1659. help
  1660. With this option, the boot code will look for a device tree binary
  1661. (DTB) appended to zImage
  1662. (e.g. cat zImage <filename>.dtb > zImage_w_dtb).
  1663. This is meant as a backward compatibility convenience for those
  1664. systems with a bootloader that can't be upgraded to accommodate
  1665. the documented boot protocol using a device tree.
  1666. Beware that there is very little in terms of protection against
  1667. this option being confused by leftover garbage in memory that might
  1668. look like a DTB header after a reboot if no actual DTB is appended
  1669. to zImage. Do not leave this option active in a production kernel
  1670. if you don't intend to always append a DTB. Proper passing of the
  1671. location into r2 of a bootloader provided DTB is always preferable
  1672. to this option.
  1673. config ARM_ATAG_DTB_COMPAT
  1674. bool "Supplement the appended DTB with traditional ATAG information"
  1675. depends on ARM_APPENDED_DTB
  1676. help
  1677. Some old bootloaders can't be updated to a DTB capable one, yet
  1678. they provide ATAGs with memory configuration, the ramdisk address,
  1679. the kernel cmdline string, etc. Such information is dynamically
  1680. provided by the bootloader and can't always be stored in a static
  1681. DTB. To allow a device tree enabled kernel to be used with such
  1682. bootloaders, this option allows zImage to extract the information
  1683. from the ATAG list and store it at run time into the appended DTB.
  1684. config CMDLINE
  1685. string "Default kernel command string"
  1686. default ""
  1687. help
  1688. On some architectures (EBSA110 and CATS), there is currently no way
  1689. for the boot loader to pass arguments to the kernel. For these
  1690. architectures, you should supply some command-line options at build
  1691. time by entering them here. As a minimum, you should specify the
  1692. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  1693. choice
  1694. prompt "Kernel command line type" if CMDLINE != ""
  1695. default CMDLINE_FROM_BOOTLOADER
  1696. config CMDLINE_FROM_BOOTLOADER
  1697. bool "Use bootloader kernel arguments if available"
  1698. help
  1699. Uses the command-line options passed by the boot loader. If
  1700. the boot loader doesn't provide any, the default kernel command
  1701. string provided in CMDLINE will be used.
  1702. config CMDLINE_EXTEND
  1703. bool "Extend bootloader kernel arguments"
  1704. help
  1705. The command-line arguments provided by the boot loader will be
  1706. appended to the default kernel command string.
  1707. config CMDLINE_FORCE
  1708. bool "Always use the default kernel command string"
  1709. help
  1710. Always use the default kernel command string, even if the boot
  1711. loader passes other arguments to the kernel.
  1712. This is useful if you cannot or don't want to change the
  1713. command-line options your boot loader passes to the kernel.
  1714. endchoice
  1715. config XIP_KERNEL
  1716. bool "Kernel Execute-In-Place from ROM"
  1717. depends on !ZBOOT_ROM && !ARM_LPAE
  1718. help
  1719. Execute-In-Place allows the kernel to run from non-volatile storage
  1720. directly addressable by the CPU, such as NOR flash. This saves RAM
  1721. space since the text section of the kernel is not loaded from flash
  1722. to RAM. Read-write sections, such as the data section and stack,
  1723. are still copied to RAM. The XIP kernel is not compressed since
  1724. it has to run directly from flash, so it will take more space to
  1725. store it. The flash address used to link the kernel object files,
  1726. and for storing it, is configuration dependent. Therefore, if you
  1727. say Y here, you must know the proper physical address where to
  1728. store the kernel image depending on your own flash memory usage.
  1729. Also note that the make target becomes "make xipImage" rather than
  1730. "make zImage" or "make Image". The final kernel binary to put in
  1731. ROM memory will be arch/arm/boot/xipImage.
  1732. If unsure, say N.
  1733. config XIP_PHYS_ADDR
  1734. hex "XIP Kernel Physical Location"
  1735. depends on XIP_KERNEL
  1736. default "0x00080000"
  1737. help
  1738. This is the physical address in your flash memory the kernel will
  1739. be linked for and stored to. This address is dependent on your
  1740. own flash usage.
  1741. config KEXEC
  1742. bool "Kexec system call (EXPERIMENTAL)"
  1743. depends on EXPERIMENTAL && (!SMP || HOTPLUG_CPU)
  1744. help
  1745. kexec is a system call that implements the ability to shutdown your
  1746. current kernel, and to start another kernel. It is like a reboot
  1747. but it is independent of the system firmware. And like a reboot
  1748. you can start any kernel with it, not just Linux.
  1749. It is an ongoing process to be certain the hardware in a machine
  1750. is properly shutdown, so do not be surprised if this code does not
  1751. initially work for you. It may help to enable device hotplugging
  1752. support.
  1753. config ATAGS_PROC
  1754. bool "Export atags in procfs"
  1755. depends on KEXEC
  1756. default y
  1757. help
  1758. Should the atags used to boot the kernel be exported in an "atags"
  1759. file in procfs. Useful with kexec.
  1760. config CRASH_DUMP
  1761. bool "Build kdump crash kernel (EXPERIMENTAL)"
  1762. depends on EXPERIMENTAL
  1763. help
  1764. Generate crash dump after being started by kexec. This should
  1765. be normally only set in special crash dump kernels which are
  1766. loaded in the main kernel with kexec-tools into a specially
  1767. reserved region and then later executed after a crash by
  1768. kdump/kexec. The crash dump kernel must be compiled to a
  1769. memory address not used by the main kernel
  1770. For more details see Documentation/kdump/kdump.txt
  1771. config AUTO_ZRELADDR
  1772. bool "Auto calculation of the decompressed kernel image address"
  1773. depends on !ZBOOT_ROM && !ARCH_U300
  1774. help
  1775. ZRELADDR is the physical address where the decompressed kernel
  1776. image will be placed. If AUTO_ZRELADDR is selected, the address
  1777. will be determined at run-time by masking the current IP with
  1778. 0xf8000000. This assumes the zImage being placed in the first 128MB
  1779. from start of memory.
  1780. endmenu
  1781. menu "CPU Power Management"
  1782. if ARCH_HAS_CPUFREQ
  1783. source "drivers/cpufreq/Kconfig"
  1784. config CPU_FREQ_IMX
  1785. tristate "CPUfreq driver for i.MX CPUs"
  1786. depends on ARCH_MXC && CPU_FREQ
  1787. help
  1788. This enables the CPUfreq driver for i.MX CPUs.
  1789. config CPU_FREQ_SA1100
  1790. bool
  1791. config CPU_FREQ_SA1110
  1792. bool
  1793. config CPU_FREQ_INTEGRATOR
  1794. tristate "CPUfreq driver for ARM Integrator CPUs"
  1795. depends on ARCH_INTEGRATOR && CPU_FREQ
  1796. default y
  1797. help
  1798. This enables the CPUfreq driver for ARM Integrator CPUs.
  1799. For details, take a look at <file:Documentation/cpu-freq>.
  1800. If in doubt, say Y.
  1801. config CPU_FREQ_PXA
  1802. bool
  1803. depends on CPU_FREQ && ARCH_PXA && PXA25x
  1804. default y
  1805. select CPU_FREQ_TABLE
  1806. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  1807. config CPU_FREQ_S3C
  1808. bool
  1809. help
  1810. Internal configuration node for common cpufreq on Samsung SoC
  1811. config CPU_FREQ_S3C24XX
  1812. bool "CPUfreq driver for Samsung S3C24XX series CPUs (EXPERIMENTAL)"
  1813. depends on ARCH_S3C24XX && CPU_FREQ && EXPERIMENTAL
  1814. select CPU_FREQ_S3C
  1815. help
  1816. This enables the CPUfreq driver for the Samsung S3C24XX family
  1817. of CPUs.
  1818. For details, take a look at <file:Documentation/cpu-freq>.
  1819. If in doubt, say N.
  1820. config CPU_FREQ_S3C24XX_PLL
  1821. bool "Support CPUfreq changing of PLL frequency (EXPERIMENTAL)"
  1822. depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
  1823. help
  1824. Compile in support for changing the PLL frequency from the
  1825. S3C24XX series CPUfreq driver. The PLL takes time to settle
  1826. after a frequency change, so by default it is not enabled.
  1827. This also means that the PLL tables for the selected CPU(s) will
  1828. be built which may increase the size of the kernel image.
  1829. config CPU_FREQ_S3C24XX_DEBUG
  1830. bool "Debug CPUfreq Samsung driver core"
  1831. depends on CPU_FREQ_S3C24XX
  1832. help
  1833. Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
  1834. config CPU_FREQ_S3C24XX_IODEBUG
  1835. bool "Debug CPUfreq Samsung driver IO timing"
  1836. depends on CPU_FREQ_S3C24XX
  1837. help
  1838. Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
  1839. config CPU_FREQ_S3C24XX_DEBUGFS
  1840. bool "Export debugfs for CPUFreq"
  1841. depends on CPU_FREQ_S3C24XX && DEBUG_FS
  1842. help
  1843. Export status information via debugfs.
  1844. endif
  1845. source "drivers/cpuidle/Kconfig"
  1846. endmenu
  1847. menu "Floating point emulation"
  1848. comment "At least one emulation must be selected"
  1849. config FPE_NWFPE
  1850. bool "NWFPE math emulation"
  1851. depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
  1852. ---help---
  1853. Say Y to include the NWFPE floating point emulator in the kernel.
  1854. This is necessary to run most binaries. Linux does not currently
  1855. support floating point hardware so you need to say Y here even if
  1856. your machine has an FPA or floating point co-processor podule.
  1857. You may say N here if you are going to load the Acorn FPEmulator
  1858. early in the bootup.
  1859. config FPE_NWFPE_XP
  1860. bool "Support extended precision"
  1861. depends on FPE_NWFPE
  1862. help
  1863. Say Y to include 80-bit support in the kernel floating-point
  1864. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  1865. Note that gcc does not generate 80-bit operations by default,
  1866. so in most cases this option only enlarges the size of the
  1867. floating point emulator without any good reason.
  1868. You almost surely want to say N here.
  1869. config FPE_FASTFPE
  1870. bool "FastFPE math emulation (EXPERIMENTAL)"
  1871. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  1872. ---help---
  1873. Say Y here to include the FAST floating point emulator in the kernel.
  1874. This is an experimental much faster emulator which now also has full
  1875. precision for the mantissa. It does not support any exceptions.
  1876. It is very simple, and approximately 3-6 times faster than NWFPE.
  1877. It should be sufficient for most programs. It may be not suitable
  1878. for scientific calculations, but you have to check this for yourself.
  1879. If you do not feel you need a faster FP emulation you should better
  1880. choose NWFPE.
  1881. config VFP
  1882. bool "VFP-format floating point maths"
  1883. depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  1884. help
  1885. Say Y to include VFP support code in the kernel. This is needed
  1886. if your hardware includes a VFP unit.
  1887. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  1888. release notes and additional status information.
  1889. Say N if your target does not have VFP hardware.
  1890. config VFPv3
  1891. bool
  1892. depends on VFP
  1893. default y if CPU_V7
  1894. config NEON
  1895. bool "Advanced SIMD (NEON) Extension support"
  1896. depends on VFPv3 && CPU_V7
  1897. help
  1898. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  1899. Extension.
  1900. endmenu
  1901. menu "Userspace binary formats"
  1902. source "fs/Kconfig.binfmt"
  1903. config ARTHUR
  1904. tristate "RISC OS personality"
  1905. depends on !AEABI
  1906. help
  1907. Say Y here to include the kernel code necessary if you want to run
  1908. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  1909. experimental; if this sounds frightening, say N and sleep in peace.
  1910. You can also say M here to compile this support as a module (which
  1911. will be called arthur).
  1912. endmenu
  1913. menu "Power management options"
  1914. source "kernel/power/Kconfig"
  1915. config ARCH_SUSPEND_POSSIBLE
  1916. depends on !ARCH_S5PC100 && !ARCH_TEGRA
  1917. depends on CPU_ARM920T || CPU_ARM926T || CPU_SA1100 || \
  1918. CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE || CPU_MOHAWK
  1919. def_bool y
  1920. config ARM_CPU_SUSPEND
  1921. def_bool PM_SLEEP
  1922. endmenu
  1923. source "net/Kconfig"
  1924. source "drivers/Kconfig"
  1925. source "fs/Kconfig"
  1926. source "arch/arm/Kconfig.debug"
  1927. source "security/Kconfig"
  1928. source "crypto/Kconfig"
  1929. source "lib/Kconfig"