Kconfig 66 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_SOCFPGA
  205. bool "Altera SOCFPGA family"
  206. select ARCH_WANT_OPTIONAL_GPIOLIB
  207. select ARM_AMBA
  208. select ARM_GIC
  209. select CACHE_L2X0
  210. select CLKDEV_LOOKUP
  211. select COMMON_CLK
  212. select CPU_V7
  213. select DW_APB_TIMER
  214. select DW_APB_TIMER_OF
  215. select GENERIC_CLOCKEVENTS
  216. select GPIO_PL061 if GPIOLIB
  217. select HAVE_ARM_SCU
  218. select SPARSE_IRQ
  219. select USE_OF
  220. help
  221. This enables support for Altera SOCFPGA Cyclone V platform
  222. config ARCH_INTEGRATOR
  223. bool "ARM Ltd. Integrator family"
  224. select ARM_AMBA
  225. select ARCH_HAS_CPUFREQ
  226. select CLKDEV_LOOKUP
  227. select HAVE_MACH_CLKDEV
  228. select HAVE_TCM
  229. select ICST
  230. select GENERIC_CLOCKEVENTS
  231. select PLAT_VERSATILE
  232. select PLAT_VERSATILE_FPGA_IRQ
  233. select NEED_MACH_IO_H
  234. select NEED_MACH_MEMORY_H
  235. select SPARSE_IRQ
  236. select MULTI_IRQ_HANDLER
  237. help
  238. Support for ARM's Integrator platform.
  239. config ARCH_REALVIEW
  240. bool "ARM Ltd. RealView family"
  241. select ARM_AMBA
  242. select CLKDEV_LOOKUP
  243. select HAVE_MACH_CLKDEV
  244. select ICST
  245. select GENERIC_CLOCKEVENTS
  246. select ARCH_WANT_OPTIONAL_GPIOLIB
  247. select PLAT_VERSATILE
  248. select PLAT_VERSATILE_CLCD
  249. select ARM_TIMER_SP804
  250. select GPIO_PL061 if GPIOLIB
  251. select NEED_MACH_MEMORY_H
  252. help
  253. This enables support for ARM Ltd RealView boards.
  254. config ARCH_VERSATILE
  255. bool "ARM Ltd. Versatile family"
  256. select ARM_AMBA
  257. select ARM_VIC
  258. select CLKDEV_LOOKUP
  259. select HAVE_MACH_CLKDEV
  260. select ICST
  261. select GENERIC_CLOCKEVENTS
  262. select ARCH_WANT_OPTIONAL_GPIOLIB
  263. select NEED_MACH_IO_H if PCI
  264. select PLAT_VERSATILE
  265. select PLAT_VERSATILE_CLCD
  266. select PLAT_VERSATILE_FPGA_IRQ
  267. select ARM_TIMER_SP804
  268. help
  269. This enables support for ARM Ltd Versatile board.
  270. config ARCH_VEXPRESS
  271. bool "ARM Ltd. Versatile Express family"
  272. select ARCH_WANT_OPTIONAL_GPIOLIB
  273. select ARM_AMBA
  274. select ARM_TIMER_SP804
  275. select CLKDEV_LOOKUP
  276. select HAVE_MACH_CLKDEV
  277. select GENERIC_CLOCKEVENTS
  278. select HAVE_CLK
  279. select HAVE_PATA_PLATFORM
  280. select ICST
  281. select NO_IOPORT
  282. select PLAT_VERSATILE
  283. select PLAT_VERSATILE_CLCD
  284. help
  285. This enables support for the ARM Ltd Versatile Express boards.
  286. config ARCH_AT91
  287. bool "Atmel AT91"
  288. select ARCH_REQUIRE_GPIOLIB
  289. select HAVE_CLK
  290. select CLKDEV_LOOKUP
  291. select IRQ_DOMAIN
  292. select NEED_MACH_IO_H if PCCARD
  293. help
  294. This enables support for systems based on Atmel
  295. AT91RM9200 and AT91SAM9* processors.
  296. config ARCH_BCMRING
  297. bool "Broadcom BCMRING"
  298. depends on MMU
  299. select CPU_V6
  300. select ARM_AMBA
  301. select ARM_TIMER_SP804
  302. select CLKDEV_LOOKUP
  303. select GENERIC_CLOCKEVENTS
  304. select ARCH_WANT_OPTIONAL_GPIOLIB
  305. help
  306. Support for Broadcom's BCMRing platform.
  307. config ARCH_HIGHBANK
  308. bool "Calxeda Highbank-based"
  309. select ARCH_WANT_OPTIONAL_GPIOLIB
  310. select ARM_AMBA
  311. select ARM_GIC
  312. select ARM_TIMER_SP804
  313. select CACHE_L2X0
  314. select CLKDEV_LOOKUP
  315. select CPU_V7
  316. select GENERIC_CLOCKEVENTS
  317. select HAVE_ARM_SCU
  318. select HAVE_SMP
  319. select SPARSE_IRQ
  320. select USE_OF
  321. help
  322. Support for the Calxeda Highbank SoC based boards.
  323. config ARCH_CLPS711X
  324. bool "Cirrus Logic CLPS711x/EP721x/EP731x-based"
  325. select CPU_ARM720T
  326. select ARCH_USES_GETTIMEOFFSET
  327. select NEED_MACH_MEMORY_H
  328. help
  329. Support for Cirrus Logic 711x/721x/731x based boards.
  330. config ARCH_CNS3XXX
  331. bool "Cavium Networks CNS3XXX family"
  332. select CPU_V6K
  333. select GENERIC_CLOCKEVENTS
  334. select ARM_GIC
  335. select MIGHT_HAVE_CACHE_L2X0
  336. select MIGHT_HAVE_PCI
  337. select PCI_DOMAINS if PCI
  338. help
  339. Support for Cavium Networks CNS3XXX platform.
  340. config ARCH_GEMINI
  341. bool "Cortina Systems Gemini"
  342. select CPU_FA526
  343. select ARCH_REQUIRE_GPIOLIB
  344. select ARCH_USES_GETTIMEOFFSET
  345. help
  346. Support for the Cortina Systems Gemini family SoCs
  347. config ARCH_PRIMA2
  348. bool "CSR SiRFSoC PRIMA2 ARM Cortex A9 Platform"
  349. select CPU_V7
  350. select NO_IOPORT
  351. select GENERIC_CLOCKEVENTS
  352. select CLKDEV_LOOKUP
  353. select GENERIC_IRQ_CHIP
  354. select MIGHT_HAVE_CACHE_L2X0
  355. select PINCTRL
  356. select PINCTRL_SIRF
  357. select USE_OF
  358. select ZONE_DMA
  359. help
  360. Support for CSR SiRFSoC ARM Cortex A9 Platform
  361. config ARCH_EBSA110
  362. bool "EBSA-110"
  363. select CPU_SA110
  364. select ISA
  365. select NO_IOPORT
  366. select ARCH_USES_GETTIMEOFFSET
  367. select NEED_MACH_IO_H
  368. select NEED_MACH_MEMORY_H
  369. help
  370. This is an evaluation board for the StrongARM processor available
  371. from Digital. It has limited hardware on-board, including an
  372. Ethernet interface, two PCMCIA sockets, two serial ports and a
  373. parallel port.
  374. config ARCH_EP93XX
  375. bool "EP93xx-based"
  376. select CPU_ARM920T
  377. select ARM_AMBA
  378. select ARM_VIC
  379. select CLKDEV_LOOKUP
  380. select ARCH_REQUIRE_GPIOLIB
  381. select ARCH_HAS_HOLES_MEMORYMODEL
  382. select ARCH_USES_GETTIMEOFFSET
  383. select NEED_MACH_MEMORY_H
  384. help
  385. This enables support for the Cirrus EP93xx series of CPUs.
  386. config ARCH_FOOTBRIDGE
  387. bool "FootBridge"
  388. select CPU_SA110
  389. select FOOTBRIDGE
  390. select GENERIC_CLOCKEVENTS
  391. select HAVE_IDE
  392. select NEED_MACH_IO_H
  393. select NEED_MACH_MEMORY_H
  394. help
  395. Support for systems based on the DC21285 companion chip
  396. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  397. config ARCH_MXC
  398. bool "Freescale MXC/iMX-based"
  399. select GENERIC_CLOCKEVENTS
  400. select ARCH_REQUIRE_GPIOLIB
  401. select CLKDEV_LOOKUP
  402. select CLKSRC_MMIO
  403. select GENERIC_IRQ_CHIP
  404. select MULTI_IRQ_HANDLER
  405. help
  406. Support for Freescale MXC/iMX-based family of processors
  407. config ARCH_MXS
  408. bool "Freescale MXS-based"
  409. select GENERIC_CLOCKEVENTS
  410. select ARCH_REQUIRE_GPIOLIB
  411. select CLKDEV_LOOKUP
  412. select CLKSRC_MMIO
  413. select COMMON_CLK
  414. select HAVE_CLK_PREPARE
  415. select PINCTRL
  416. select USE_OF
  417. help
  418. Support for Freescale MXS-based family of processors
  419. config ARCH_NETX
  420. bool "Hilscher NetX based"
  421. select CLKSRC_MMIO
  422. select CPU_ARM926T
  423. select ARM_VIC
  424. select GENERIC_CLOCKEVENTS
  425. help
  426. This enables support for systems based on the Hilscher NetX Soc
  427. config ARCH_H720X
  428. bool "Hynix HMS720x-based"
  429. select CPU_ARM720T
  430. select ISA_DMA_API
  431. select ARCH_USES_GETTIMEOFFSET
  432. help
  433. This enables support for systems based on the Hynix HMS720x
  434. config ARCH_IOP13XX
  435. bool "IOP13xx-based"
  436. depends on MMU
  437. select CPU_XSC3
  438. select PLAT_IOP
  439. select PCI
  440. select ARCH_SUPPORTS_MSI
  441. select VMSPLIT_1G
  442. select NEED_MACH_IO_H
  443. select NEED_MACH_MEMORY_H
  444. select NEED_RET_TO_USER
  445. help
  446. Support for Intel's IOP13XX (XScale) family of processors.
  447. config ARCH_IOP32X
  448. bool "IOP32x-based"
  449. depends on MMU
  450. select CPU_XSCALE
  451. select NEED_MACH_IO_H
  452. select NEED_RET_TO_USER
  453. select PLAT_IOP
  454. select PCI
  455. select ARCH_REQUIRE_GPIOLIB
  456. help
  457. Support for Intel's 80219 and IOP32X (XScale) family of
  458. processors.
  459. config ARCH_IOP33X
  460. bool "IOP33x-based"
  461. depends on MMU
  462. select CPU_XSCALE
  463. select NEED_MACH_IO_H
  464. select NEED_RET_TO_USER
  465. select PLAT_IOP
  466. select PCI
  467. select ARCH_REQUIRE_GPIOLIB
  468. help
  469. Support for Intel's IOP33X (XScale) family of processors.
  470. config ARCH_IXP4XX
  471. bool "IXP4xx-based"
  472. depends on MMU
  473. select ARCH_HAS_DMA_SET_COHERENT_MASK
  474. select CLKSRC_MMIO
  475. select CPU_XSCALE
  476. select ARCH_REQUIRE_GPIOLIB
  477. select GENERIC_CLOCKEVENTS
  478. select MIGHT_HAVE_PCI
  479. select NEED_MACH_IO_H
  480. select DMABOUNCE if PCI
  481. help
  482. Support for Intel's IXP4XX (XScale) family of processors.
  483. config ARCH_MVEBU
  484. bool "Marvell SOCs with Device Tree support"
  485. select GENERIC_CLOCKEVENTS
  486. select MULTI_IRQ_HANDLER
  487. select SPARSE_IRQ
  488. select CLKSRC_MMIO
  489. select GENERIC_IRQ_CHIP
  490. select IRQ_DOMAIN
  491. select COMMON_CLK
  492. help
  493. Support for the Marvell SoC Family with device tree support
  494. config ARCH_DOVE
  495. bool "Marvell Dove"
  496. select CPU_V7
  497. select PCI
  498. select ARCH_REQUIRE_GPIOLIB
  499. select GENERIC_CLOCKEVENTS
  500. select NEED_MACH_IO_H
  501. select PLAT_ORION
  502. help
  503. Support for the Marvell Dove SoC 88AP510
  504. config ARCH_KIRKWOOD
  505. bool "Marvell Kirkwood"
  506. select CPU_FEROCEON
  507. select PCI
  508. select ARCH_REQUIRE_GPIOLIB
  509. select GENERIC_CLOCKEVENTS
  510. select NEED_MACH_IO_H
  511. select PLAT_ORION
  512. help
  513. Support for the following Marvell Kirkwood series SoCs:
  514. 88F6180, 88F6192 and 88F6281.
  515. config ARCH_LPC32XX
  516. bool "NXP LPC32XX"
  517. select CLKSRC_MMIO
  518. select CPU_ARM926T
  519. select ARCH_REQUIRE_GPIOLIB
  520. select HAVE_IDE
  521. select ARM_AMBA
  522. select USB_ARCH_HAS_OHCI
  523. select CLKDEV_LOOKUP
  524. select GENERIC_CLOCKEVENTS
  525. select USE_OF
  526. help
  527. Support for the NXP LPC32XX family of processors
  528. config ARCH_MV78XX0
  529. bool "Marvell MV78xx0"
  530. select CPU_FEROCEON
  531. select PCI
  532. select ARCH_REQUIRE_GPIOLIB
  533. select GENERIC_CLOCKEVENTS
  534. select NEED_MACH_IO_H
  535. select PLAT_ORION
  536. help
  537. Support for the following Marvell MV78xx0 series SoCs:
  538. MV781x0, MV782x0.
  539. config ARCH_ORION5X
  540. bool "Marvell Orion"
  541. depends on MMU
  542. select CPU_FEROCEON
  543. select PCI
  544. select ARCH_REQUIRE_GPIOLIB
  545. select GENERIC_CLOCKEVENTS
  546. select NEED_MACH_IO_H
  547. select PLAT_ORION
  548. help
  549. Support for the following Marvell Orion 5x series SoCs:
  550. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  551. Orion-2 (5281), Orion-1-90 (6183).
  552. config ARCH_MMP
  553. bool "Marvell PXA168/910/MMP2"
  554. depends on MMU
  555. select ARCH_REQUIRE_GPIOLIB
  556. select CLKDEV_LOOKUP
  557. select GENERIC_CLOCKEVENTS
  558. select GPIO_PXA
  559. select IRQ_DOMAIN
  560. select PLAT_PXA
  561. select SPARSE_IRQ
  562. select GENERIC_ALLOCATOR
  563. help
  564. Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
  565. config ARCH_KS8695
  566. bool "Micrel/Kendin KS8695"
  567. select CPU_ARM922T
  568. select ARCH_REQUIRE_GPIOLIB
  569. select ARCH_USES_GETTIMEOFFSET
  570. select NEED_MACH_MEMORY_H
  571. help
  572. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  573. System-on-Chip devices.
  574. config ARCH_W90X900
  575. bool "Nuvoton W90X900 CPU"
  576. select CPU_ARM926T
  577. select ARCH_REQUIRE_GPIOLIB
  578. select CLKDEV_LOOKUP
  579. select CLKSRC_MMIO
  580. select GENERIC_CLOCKEVENTS
  581. help
  582. Support for Nuvoton (Winbond logic dept.) ARM9 processor,
  583. At present, the w90x900 has been renamed nuc900, regarding
  584. the ARM series product line, you can login the following
  585. link address to know more.
  586. <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
  587. ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
  588. config ARCH_TEGRA
  589. bool "NVIDIA Tegra"
  590. select CLKDEV_LOOKUP
  591. select CLKSRC_MMIO
  592. select GENERIC_CLOCKEVENTS
  593. select GENERIC_GPIO
  594. select HAVE_CLK
  595. select HAVE_SMP
  596. select MIGHT_HAVE_CACHE_L2X0
  597. select NEED_MACH_IO_H if PCI
  598. select ARCH_HAS_CPUFREQ
  599. help
  600. This enables support for NVIDIA Tegra based systems (Tegra APX,
  601. Tegra 6xx and Tegra 2 series).
  602. config ARCH_PICOXCELL
  603. bool "Picochip picoXcell"
  604. select ARCH_REQUIRE_GPIOLIB
  605. select ARM_PATCH_PHYS_VIRT
  606. select ARM_VIC
  607. select CPU_V6K
  608. select DW_APB_TIMER
  609. select GENERIC_CLOCKEVENTS
  610. select GENERIC_GPIO
  611. select HAVE_TCM
  612. select NO_IOPORT
  613. select SPARSE_IRQ
  614. select USE_OF
  615. help
  616. This enables support for systems based on the Picochip picoXcell
  617. family of Femtocell devices. The picoxcell support requires device tree
  618. for all boards.
  619. config ARCH_PNX4008
  620. bool "Philips Nexperia PNX4008 Mobile"
  621. select CPU_ARM926T
  622. select CLKDEV_LOOKUP
  623. select ARCH_USES_GETTIMEOFFSET
  624. help
  625. This enables support for Philips PNX4008 mobile platform.
  626. config ARCH_PXA
  627. bool "PXA2xx/PXA3xx-based"
  628. depends on MMU
  629. select ARCH_MTD_XIP
  630. select ARCH_HAS_CPUFREQ
  631. select CLKDEV_LOOKUP
  632. select CLKSRC_MMIO
  633. select ARCH_REQUIRE_GPIOLIB
  634. select GENERIC_CLOCKEVENTS
  635. select GPIO_PXA
  636. select PLAT_PXA
  637. select SPARSE_IRQ
  638. select AUTO_ZRELADDR
  639. select MULTI_IRQ_HANDLER
  640. select ARM_CPU_SUSPEND if PM
  641. select HAVE_IDE
  642. help
  643. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  644. config ARCH_MSM
  645. bool "Qualcomm MSM"
  646. select HAVE_CLK
  647. select GENERIC_CLOCKEVENTS
  648. select ARCH_REQUIRE_GPIOLIB
  649. select CLKDEV_LOOKUP
  650. help
  651. Support for Qualcomm MSM/QSD based systems. This runs on the
  652. apps processor of the MSM/QSD and depends on a shared memory
  653. interface to the modem processor which runs the baseband
  654. stack and controls some vital subsystems
  655. (clock and power control, etc).
  656. config ARCH_SHMOBILE
  657. bool "Renesas SH-Mobile / R-Mobile"
  658. select HAVE_CLK
  659. select CLKDEV_LOOKUP
  660. select HAVE_MACH_CLKDEV
  661. select HAVE_SMP
  662. select GENERIC_CLOCKEVENTS
  663. select MIGHT_HAVE_CACHE_L2X0
  664. select NO_IOPORT
  665. select SPARSE_IRQ
  666. select MULTI_IRQ_HANDLER
  667. select PM_GENERIC_DOMAINS if PM
  668. select NEED_MACH_MEMORY_H
  669. help
  670. Support for Renesas's SH-Mobile and R-Mobile ARM platforms.
  671. config ARCH_RPC
  672. bool "RiscPC"
  673. select ARCH_ACORN
  674. select FIQ
  675. select ARCH_MAY_HAVE_PC_FDC
  676. select HAVE_PATA_PLATFORM
  677. select ISA_DMA_API
  678. select NO_IOPORT
  679. select ARCH_SPARSEMEM_ENABLE
  680. select ARCH_USES_GETTIMEOFFSET
  681. select HAVE_IDE
  682. select NEED_MACH_IO_H
  683. select NEED_MACH_MEMORY_H
  684. help
  685. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  686. CD-ROM interface, serial and parallel port, and the floppy drive.
  687. config ARCH_SA1100
  688. bool "SA1100-based"
  689. select CLKSRC_MMIO
  690. select CPU_SA1100
  691. select ISA
  692. select ARCH_SPARSEMEM_ENABLE
  693. select ARCH_MTD_XIP
  694. select ARCH_HAS_CPUFREQ
  695. select CPU_FREQ
  696. select GENERIC_CLOCKEVENTS
  697. select CLKDEV_LOOKUP
  698. select ARCH_REQUIRE_GPIOLIB
  699. select HAVE_IDE
  700. select NEED_MACH_MEMORY_H
  701. select SPARSE_IRQ
  702. help
  703. Support for StrongARM 11x0 based boards.
  704. config ARCH_S3C24XX
  705. bool "Samsung S3C24XX SoCs"
  706. select GENERIC_GPIO
  707. select ARCH_HAS_CPUFREQ
  708. select HAVE_CLK
  709. select CLKDEV_LOOKUP
  710. select ARCH_USES_GETTIMEOFFSET
  711. select HAVE_S3C2410_I2C if I2C
  712. select HAVE_S3C_RTC if RTC_CLASS
  713. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  714. select NEED_MACH_IO_H
  715. help
  716. Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443
  717. and S3C2450 SoCs based systems, such as the Simtec Electronics BAST
  718. (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or the
  719. Samsung SMDK2410 development board (and derivatives).
  720. config ARCH_S3C64XX
  721. bool "Samsung S3C64XX"
  722. select PLAT_SAMSUNG
  723. select CPU_V6
  724. select ARM_VIC
  725. select HAVE_CLK
  726. select HAVE_TCM
  727. select CLKDEV_LOOKUP
  728. select NO_IOPORT
  729. select ARCH_USES_GETTIMEOFFSET
  730. select ARCH_HAS_CPUFREQ
  731. select ARCH_REQUIRE_GPIOLIB
  732. select SAMSUNG_CLKSRC
  733. select SAMSUNG_IRQ_VIC_TIMER
  734. select S3C_GPIO_TRACK
  735. select S3C_DEV_NAND
  736. select USB_ARCH_HAS_OHCI
  737. select SAMSUNG_GPIOLIB_4BIT
  738. select HAVE_S3C2410_I2C if I2C
  739. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  740. help
  741. Samsung S3C64XX series based systems
  742. config ARCH_S5P64X0
  743. bool "Samsung S5P6440 S5P6450"
  744. select CPU_V6
  745. select GENERIC_GPIO
  746. select HAVE_CLK
  747. select CLKDEV_LOOKUP
  748. select CLKSRC_MMIO
  749. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  750. select GENERIC_CLOCKEVENTS
  751. select HAVE_S3C2410_I2C if I2C
  752. select HAVE_S3C_RTC if RTC_CLASS
  753. help
  754. Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
  755. SMDK6450.
  756. config ARCH_S5PC100
  757. bool "Samsung S5PC100"
  758. select GENERIC_GPIO
  759. select HAVE_CLK
  760. select CLKDEV_LOOKUP
  761. select CPU_V7
  762. select ARCH_USES_GETTIMEOFFSET
  763. select HAVE_S3C2410_I2C if I2C
  764. select HAVE_S3C_RTC if RTC_CLASS
  765. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  766. help
  767. Samsung S5PC100 series based systems
  768. config ARCH_S5PV210
  769. bool "Samsung S5PV210/S5PC110"
  770. select CPU_V7
  771. select ARCH_SPARSEMEM_ENABLE
  772. select ARCH_HAS_HOLES_MEMORYMODEL
  773. select GENERIC_GPIO
  774. select HAVE_CLK
  775. select CLKDEV_LOOKUP
  776. select CLKSRC_MMIO
  777. select ARCH_HAS_CPUFREQ
  778. select GENERIC_CLOCKEVENTS
  779. select HAVE_S3C2410_I2C if I2C
  780. select HAVE_S3C_RTC if RTC_CLASS
  781. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  782. select NEED_MACH_MEMORY_H
  783. help
  784. Samsung S5PV210/S5PC110 series based systems
  785. config ARCH_EXYNOS
  786. bool "SAMSUNG EXYNOS"
  787. select CPU_V7
  788. select ARCH_SPARSEMEM_ENABLE
  789. select ARCH_HAS_HOLES_MEMORYMODEL
  790. select GENERIC_GPIO
  791. select HAVE_CLK
  792. select CLKDEV_LOOKUP
  793. select ARCH_HAS_CPUFREQ
  794. select GENERIC_CLOCKEVENTS
  795. select HAVE_S3C_RTC if RTC_CLASS
  796. select HAVE_S3C2410_I2C if I2C
  797. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  798. select NEED_MACH_MEMORY_H
  799. help
  800. Support for SAMSUNG's EXYNOS SoCs (EXYNOS4/5)
  801. config ARCH_SHARK
  802. bool "Shark"
  803. select CPU_SA110
  804. select ISA
  805. select ISA_DMA
  806. select ZONE_DMA
  807. select PCI
  808. select ARCH_USES_GETTIMEOFFSET
  809. select NEED_MACH_MEMORY_H
  810. select NEED_MACH_IO_H
  811. help
  812. Support for the StrongARM based Digital DNARD machine, also known
  813. as "Shark" (<http://www.shark-linux.de/shark.html>).
  814. config ARCH_U300
  815. bool "ST-Ericsson U300 Series"
  816. depends on MMU
  817. select CLKSRC_MMIO
  818. select CPU_ARM926T
  819. select HAVE_TCM
  820. select ARM_AMBA
  821. select ARM_PATCH_PHYS_VIRT
  822. select ARM_VIC
  823. select GENERIC_CLOCKEVENTS
  824. select CLKDEV_LOOKUP
  825. select HAVE_MACH_CLKDEV
  826. select GENERIC_GPIO
  827. select ARCH_REQUIRE_GPIOLIB
  828. help
  829. Support for ST-Ericsson U300 series mobile platforms.
  830. config ARCH_U8500
  831. bool "ST-Ericsson U8500 Series"
  832. depends on MMU
  833. select CPU_V7
  834. select ARM_AMBA
  835. select GENERIC_CLOCKEVENTS
  836. select CLKDEV_LOOKUP
  837. select ARCH_REQUIRE_GPIOLIB
  838. select ARCH_HAS_CPUFREQ
  839. select HAVE_SMP
  840. select MIGHT_HAVE_CACHE_L2X0
  841. help
  842. Support for ST-Ericsson's Ux500 architecture
  843. config ARCH_NOMADIK
  844. bool "STMicroelectronics Nomadik"
  845. select ARM_AMBA
  846. select ARM_VIC
  847. select CPU_ARM926T
  848. select CLKDEV_LOOKUP
  849. select GENERIC_CLOCKEVENTS
  850. select PINCTRL
  851. select MIGHT_HAVE_CACHE_L2X0
  852. select ARCH_REQUIRE_GPIOLIB
  853. help
  854. Support for the Nomadik platform by ST-Ericsson
  855. config ARCH_DAVINCI
  856. bool "TI DaVinci"
  857. select GENERIC_CLOCKEVENTS
  858. select ARCH_REQUIRE_GPIOLIB
  859. select ZONE_DMA
  860. select HAVE_IDE
  861. select CLKDEV_LOOKUP
  862. select GENERIC_ALLOCATOR
  863. select GENERIC_IRQ_CHIP
  864. select ARCH_HAS_HOLES_MEMORYMODEL
  865. help
  866. Support for TI's DaVinci platform.
  867. config ARCH_OMAP
  868. bool "TI OMAP"
  869. select HAVE_CLK
  870. select ARCH_REQUIRE_GPIOLIB
  871. select ARCH_HAS_CPUFREQ
  872. select CLKSRC_MMIO
  873. select GENERIC_CLOCKEVENTS
  874. select ARCH_HAS_HOLES_MEMORYMODEL
  875. help
  876. Support for TI's OMAP platform (OMAP1/2/3/4).
  877. config PLAT_SPEAR
  878. bool "ST SPEAr"
  879. select ARM_AMBA
  880. select ARCH_REQUIRE_GPIOLIB
  881. select CLKDEV_LOOKUP
  882. select COMMON_CLK
  883. select CLKSRC_MMIO
  884. select GENERIC_CLOCKEVENTS
  885. select HAVE_CLK
  886. help
  887. Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
  888. config ARCH_VT8500
  889. bool "VIA/WonderMedia 85xx"
  890. select CPU_ARM926T
  891. select GENERIC_GPIO
  892. select ARCH_HAS_CPUFREQ
  893. select GENERIC_CLOCKEVENTS
  894. select ARCH_REQUIRE_GPIOLIB
  895. select HAVE_PWM
  896. help
  897. Support for VIA/WonderMedia VT8500/WM85xx System-on-Chip.
  898. config ARCH_ZYNQ
  899. bool "Xilinx Zynq ARM Cortex A9 Platform"
  900. select CPU_V7
  901. select GENERIC_CLOCKEVENTS
  902. select CLKDEV_LOOKUP
  903. select ARM_GIC
  904. select ARM_AMBA
  905. select ICST
  906. select MIGHT_HAVE_CACHE_L2X0
  907. select USE_OF
  908. help
  909. Support for Xilinx Zynq ARM Cortex A9 Platform
  910. endchoice
  911. #
  912. # This is sorted alphabetically by mach-* pathname. However, plat-*
  913. # Kconfigs may be included either alphabetically (according to the
  914. # plat- suffix) or along side the corresponding mach-* source.
  915. #
  916. source "arch/arm/mach-mvebu/Kconfig"
  917. source "arch/arm/mach-at91/Kconfig"
  918. source "arch/arm/mach-bcmring/Kconfig"
  919. source "arch/arm/mach-clps711x/Kconfig"
  920. source "arch/arm/mach-cns3xxx/Kconfig"
  921. source "arch/arm/mach-davinci/Kconfig"
  922. source "arch/arm/mach-dove/Kconfig"
  923. source "arch/arm/mach-ep93xx/Kconfig"
  924. source "arch/arm/mach-footbridge/Kconfig"
  925. source "arch/arm/mach-gemini/Kconfig"
  926. source "arch/arm/mach-h720x/Kconfig"
  927. source "arch/arm/mach-integrator/Kconfig"
  928. source "arch/arm/mach-iop32x/Kconfig"
  929. source "arch/arm/mach-iop33x/Kconfig"
  930. source "arch/arm/mach-iop13xx/Kconfig"
  931. source "arch/arm/mach-ixp4xx/Kconfig"
  932. source "arch/arm/mach-kirkwood/Kconfig"
  933. source "arch/arm/mach-ks8695/Kconfig"
  934. source "arch/arm/mach-lpc32xx/Kconfig"
  935. source "arch/arm/mach-msm/Kconfig"
  936. source "arch/arm/mach-mv78xx0/Kconfig"
  937. source "arch/arm/plat-mxc/Kconfig"
  938. source "arch/arm/mach-mxs/Kconfig"
  939. source "arch/arm/mach-netx/Kconfig"
  940. source "arch/arm/mach-nomadik/Kconfig"
  941. source "arch/arm/plat-nomadik/Kconfig"
  942. source "arch/arm/plat-omap/Kconfig"
  943. source "arch/arm/mach-omap1/Kconfig"
  944. source "arch/arm/mach-omap2/Kconfig"
  945. source "arch/arm/mach-orion5x/Kconfig"
  946. source "arch/arm/mach-pxa/Kconfig"
  947. source "arch/arm/plat-pxa/Kconfig"
  948. source "arch/arm/mach-mmp/Kconfig"
  949. source "arch/arm/mach-realview/Kconfig"
  950. source "arch/arm/mach-sa1100/Kconfig"
  951. source "arch/arm/plat-samsung/Kconfig"
  952. source "arch/arm/plat-s3c24xx/Kconfig"
  953. source "arch/arm/plat-spear/Kconfig"
  954. source "arch/arm/mach-s3c24xx/Kconfig"
  955. if ARCH_S3C24XX
  956. source "arch/arm/mach-s3c2412/Kconfig"
  957. source "arch/arm/mach-s3c2440/Kconfig"
  958. endif
  959. if ARCH_S3C64XX
  960. source "arch/arm/mach-s3c64xx/Kconfig"
  961. endif
  962. source "arch/arm/mach-s5p64x0/Kconfig"
  963. source "arch/arm/mach-s5pc100/Kconfig"
  964. source "arch/arm/mach-s5pv210/Kconfig"
  965. source "arch/arm/mach-exynos/Kconfig"
  966. source "arch/arm/mach-shmobile/Kconfig"
  967. source "arch/arm/mach-tegra/Kconfig"
  968. source "arch/arm/mach-u300/Kconfig"
  969. source "arch/arm/mach-ux500/Kconfig"
  970. source "arch/arm/mach-versatile/Kconfig"
  971. source "arch/arm/mach-vexpress/Kconfig"
  972. source "arch/arm/plat-versatile/Kconfig"
  973. source "arch/arm/mach-vt8500/Kconfig"
  974. source "arch/arm/mach-w90x900/Kconfig"
  975. # Definitions to make life easier
  976. config ARCH_ACORN
  977. bool
  978. config PLAT_IOP
  979. bool
  980. select GENERIC_CLOCKEVENTS
  981. config PLAT_ORION
  982. bool
  983. select CLKSRC_MMIO
  984. select GENERIC_IRQ_CHIP
  985. select COMMON_CLK
  986. config PLAT_PXA
  987. bool
  988. config PLAT_VERSATILE
  989. bool
  990. config ARM_TIMER_SP804
  991. bool
  992. select CLKSRC_MMIO
  993. select HAVE_SCHED_CLOCK
  994. source arch/arm/mm/Kconfig
  995. config ARM_NR_BANKS
  996. int
  997. default 16 if ARCH_EP93XX
  998. default 8
  999. config IWMMXT
  1000. bool "Enable iWMMXt support"
  1001. depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
  1002. default y if PXA27x || PXA3xx || PXA95x || ARCH_MMP
  1003. help
  1004. Enable support for iWMMXt context switching at run time if
  1005. running on a CPU that supports it.
  1006. config XSCALE_PMU
  1007. bool
  1008. depends on CPU_XSCALE
  1009. default y
  1010. config CPU_HAS_PMU
  1011. depends on (CPU_V6 || CPU_V6K || CPU_V7 || XSCALE_PMU) && \
  1012. (!ARCH_OMAP3 || OMAP3_EMU)
  1013. default y
  1014. bool
  1015. config MULTI_IRQ_HANDLER
  1016. bool
  1017. help
  1018. Allow each machine to specify it's own IRQ handler at run time.
  1019. if !MMU
  1020. source "arch/arm/Kconfig-nommu"
  1021. endif
  1022. config ARM_ERRATA_326103
  1023. bool "ARM errata: FSR write bit incorrect on a SWP to read-only memory"
  1024. depends on CPU_V6
  1025. help
  1026. Executing a SWP instruction to read-only memory does not set bit 11
  1027. of the FSR on the ARM 1136 prior to r1p0. This causes the kernel to
  1028. treat the access as a read, preventing a COW from occurring and
  1029. causing the faulting task to livelock.
  1030. config ARM_ERRATA_411920
  1031. bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
  1032. depends on CPU_V6 || CPU_V6K
  1033. help
  1034. Invalidation of the Instruction Cache operation can
  1035. fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
  1036. It does not affect the MPCore. This option enables the ARM Ltd.
  1037. recommended workaround.
  1038. config ARM_ERRATA_430973
  1039. bool "ARM errata: Stale prediction on replaced interworking branch"
  1040. depends on CPU_V7
  1041. help
  1042. This option enables the workaround for the 430973 Cortex-A8
  1043. (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
  1044. interworking branch is replaced with another code sequence at the
  1045. same virtual address, whether due to self-modifying code or virtual
  1046. to physical address re-mapping, Cortex-A8 does not recover from the
  1047. stale interworking branch prediction. This results in Cortex-A8
  1048. executing the new code sequence in the incorrect ARM or Thumb state.
  1049. The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
  1050. and also flushes the branch target cache at every context switch.
  1051. Note that setting specific bits in the ACTLR register may not be
  1052. available in non-secure mode.
  1053. config ARM_ERRATA_458693
  1054. bool "ARM errata: Processor deadlock when a false hazard is created"
  1055. depends on CPU_V7
  1056. help
  1057. This option enables the workaround for the 458693 Cortex-A8 (r2p0)
  1058. erratum. For very specific sequences of memory operations, it is
  1059. possible for a hazard condition intended for a cache line to instead
  1060. be incorrectly associated with a different cache line. This false
  1061. hazard might then cause a processor deadlock. The workaround enables
  1062. the L1 caching of the NEON accesses and disables the PLD instruction
  1063. in the ACTLR register. Note that setting specific bits in the ACTLR
  1064. register may not be available in non-secure mode.
  1065. config ARM_ERRATA_460075
  1066. bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
  1067. depends on CPU_V7
  1068. help
  1069. This option enables the workaround for the 460075 Cortex-A8 (r2p0)
  1070. erratum. Any asynchronous access to the L2 cache may encounter a
  1071. situation in which recent store transactions to the L2 cache are lost
  1072. and overwritten with stale memory contents from external memory. The
  1073. workaround disables the write-allocate mode for the L2 cache via the
  1074. ACTLR register. Note that setting specific bits in the ACTLR register
  1075. may not be available in non-secure mode.
  1076. config ARM_ERRATA_742230
  1077. bool "ARM errata: DMB operation may be faulty"
  1078. depends on CPU_V7 && SMP
  1079. help
  1080. This option enables the workaround for the 742230 Cortex-A9
  1081. (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
  1082. between two write operations may not ensure the correct visibility
  1083. ordering of the two writes. This workaround sets a specific bit in
  1084. the diagnostic register of the Cortex-A9 which causes the DMB
  1085. instruction to behave as a DSB, ensuring the correct behaviour of
  1086. the two writes.
  1087. config ARM_ERRATA_742231
  1088. bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
  1089. depends on CPU_V7 && SMP
  1090. help
  1091. This option enables the workaround for the 742231 Cortex-A9
  1092. (r2p0..r2p2) erratum. Under certain conditions, specific to the
  1093. Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
  1094. accessing some data located in the same cache line, may get corrupted
  1095. data due to bad handling of the address hazard when the line gets
  1096. replaced from one of the CPUs at the same time as another CPU is
  1097. accessing it. This workaround sets specific bits in the diagnostic
  1098. register of the Cortex-A9 which reduces the linefill issuing
  1099. capabilities of the processor.
  1100. config PL310_ERRATA_588369
  1101. bool "PL310 errata: Clean & Invalidate maintenance operations do not invalidate clean lines"
  1102. depends on CACHE_L2X0
  1103. help
  1104. The PL310 L2 cache controller implements three types of Clean &
  1105. Invalidate maintenance operations: by Physical Address
  1106. (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
  1107. They are architecturally defined to behave as the execution of a
  1108. clean operation followed immediately by an invalidate operation,
  1109. both performing to the same memory location. This functionality
  1110. is not correctly implemented in PL310 as clean lines are not
  1111. invalidated as a result of these operations.
  1112. config ARM_ERRATA_720789
  1113. bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
  1114. depends on CPU_V7
  1115. help
  1116. This option enables the workaround for the 720789 Cortex-A9 (prior to
  1117. r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
  1118. broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
  1119. As a consequence of this erratum, some TLB entries which should be
  1120. invalidated are not, resulting in an incoherency in the system page
  1121. tables. The workaround changes the TLB flushing routines to invalidate
  1122. entries regardless of the ASID.
  1123. config PL310_ERRATA_727915
  1124. bool "PL310 errata: Background Clean & Invalidate by Way operation can cause data corruption"
  1125. depends on CACHE_L2X0
  1126. help
  1127. PL310 implements the Clean & Invalidate by Way L2 cache maintenance
  1128. operation (offset 0x7FC). This operation runs in background so that
  1129. PL310 can handle normal accesses while it is in progress. Under very
  1130. rare circumstances, due to this erratum, write data can be lost when
  1131. PL310 treats a cacheable write transaction during a Clean &
  1132. Invalidate by Way operation.
  1133. config ARM_ERRATA_743622
  1134. bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
  1135. depends on CPU_V7
  1136. help
  1137. This option enables the workaround for the 743622 Cortex-A9
  1138. (r2p*) erratum. Under very rare conditions, a faulty
  1139. optimisation in the Cortex-A9 Store Buffer may lead to data
  1140. corruption. This workaround sets a specific bit in the diagnostic
  1141. register of the Cortex-A9 which disables the Store Buffer
  1142. optimisation, preventing the defect from occurring. This has no
  1143. visible impact on the overall performance or power consumption of the
  1144. processor.
  1145. config ARM_ERRATA_751472
  1146. bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
  1147. depends on CPU_V7
  1148. help
  1149. This option enables the workaround for the 751472 Cortex-A9 (prior
  1150. to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
  1151. completion of a following broadcasted operation if the second
  1152. operation is received by a CPU before the ICIALLUIS has completed,
  1153. potentially leading to corrupted entries in the cache or TLB.
  1154. config PL310_ERRATA_753970
  1155. bool "PL310 errata: cache sync operation may be faulty"
  1156. depends on CACHE_PL310
  1157. help
  1158. This option enables the workaround for the 753970 PL310 (r3p0) erratum.
  1159. Under some condition the effect of cache sync operation on
  1160. the store buffer still remains when the operation completes.
  1161. This means that the store buffer is always asked to drain and
  1162. this prevents it from merging any further writes. The workaround
  1163. is to replace the normal offset of cache sync operation (0x730)
  1164. by another offset targeting an unmapped PL310 register 0x740.
  1165. This has the same effect as the cache sync operation: store buffer
  1166. drain and waiting for all buffers empty.
  1167. config ARM_ERRATA_754322
  1168. bool "ARM errata: possible faulty MMU translations following an ASID switch"
  1169. depends on CPU_V7
  1170. help
  1171. This option enables the workaround for the 754322 Cortex-A9 (r2p*,
  1172. r3p*) erratum. A speculative memory access may cause a page table walk
  1173. which starts prior to an ASID switch but completes afterwards. This
  1174. can populate the micro-TLB with a stale entry which may be hit with
  1175. the new ASID. This workaround places two dsb instructions in the mm
  1176. switching code so that no page table walks can cross the ASID switch.
  1177. config ARM_ERRATA_754327
  1178. bool "ARM errata: no automatic Store Buffer drain"
  1179. depends on CPU_V7 && SMP
  1180. help
  1181. This option enables the workaround for the 754327 Cortex-A9 (prior to
  1182. r2p0) erratum. The Store Buffer does not have any automatic draining
  1183. mechanism and therefore a livelock may occur if an external agent
  1184. continuously polls a memory location waiting to observe an update.
  1185. This workaround defines cpu_relax() as smp_mb(), preventing correctly
  1186. written polling loops from denying visibility of updates to memory.
  1187. config ARM_ERRATA_364296
  1188. bool "ARM errata: Possible cache data corruption with hit-under-miss enabled"
  1189. depends on CPU_V6 && !SMP
  1190. help
  1191. This options enables the workaround for the 364296 ARM1136
  1192. r0p2 erratum (possible cache data corruption with
  1193. hit-under-miss enabled). It sets the undocumented bit 31 in
  1194. the auxiliary control register and the FI bit in the control
  1195. register, thus disabling hit-under-miss without putting the
  1196. processor into full low interrupt latency mode. ARM11MPCore
  1197. is not affected.
  1198. config ARM_ERRATA_764369
  1199. bool "ARM errata: Data cache line maintenance operation by MVA may not succeed"
  1200. depends on CPU_V7 && SMP
  1201. help
  1202. This option enables the workaround for erratum 764369
  1203. affecting Cortex-A9 MPCore with two or more processors (all
  1204. current revisions). Under certain timing circumstances, a data
  1205. cache line maintenance operation by MVA targeting an Inner
  1206. Shareable memory region may fail to proceed up to either the
  1207. Point of Coherency or to the Point of Unification of the
  1208. system. This workaround adds a DSB instruction before the
  1209. relevant cache maintenance functions and sets a specific bit
  1210. in the diagnostic control register of the SCU.
  1211. config PL310_ERRATA_769419
  1212. bool "PL310 errata: no automatic Store Buffer drain"
  1213. depends on CACHE_L2X0
  1214. help
  1215. On revisions of the PL310 prior to r3p2, the Store Buffer does
  1216. not automatically drain. This can cause normal, non-cacheable
  1217. writes to be retained when the memory system is idle, leading
  1218. to suboptimal I/O performance for drivers using coherent DMA.
  1219. This option adds a write barrier to the cpu_idle loop so that,
  1220. on systems with an outer cache, the store buffer is drained
  1221. explicitly.
  1222. endmenu
  1223. source "arch/arm/common/Kconfig"
  1224. menu "Bus support"
  1225. config ARM_AMBA
  1226. bool
  1227. config ISA
  1228. bool
  1229. help
  1230. Find out whether you have ISA slots on your motherboard. ISA is the
  1231. name of a bus system, i.e. the way the CPU talks to the other stuff
  1232. inside your box. Other bus systems are PCI, EISA, MicroChannel
  1233. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  1234. newer boards don't support it. If you have ISA, say Y, otherwise N.
  1235. # Select ISA DMA controller support
  1236. config ISA_DMA
  1237. bool
  1238. select ISA_DMA_API
  1239. # Select ISA DMA interface
  1240. config ISA_DMA_API
  1241. bool
  1242. config PCI
  1243. bool "PCI support" if MIGHT_HAVE_PCI
  1244. help
  1245. Find out whether you have a PCI motherboard. PCI is the name of a
  1246. bus system, i.e. the way the CPU talks to the other stuff inside
  1247. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  1248. VESA. If you have PCI, say Y, otherwise N.
  1249. config PCI_DOMAINS
  1250. bool
  1251. depends on PCI
  1252. config PCI_NANOENGINE
  1253. bool "BSE nanoEngine PCI support"
  1254. depends on SA1100_NANOENGINE
  1255. help
  1256. Enable PCI on the BSE nanoEngine board.
  1257. config PCI_SYSCALL
  1258. def_bool PCI
  1259. # Select the host bridge type
  1260. config PCI_HOST_VIA82C505
  1261. bool
  1262. depends on PCI && ARCH_SHARK
  1263. default y
  1264. config PCI_HOST_ITE8152
  1265. bool
  1266. depends on PCI && MACH_ARMCORE
  1267. default y
  1268. select DMABOUNCE
  1269. source "drivers/pci/Kconfig"
  1270. source "drivers/pcmcia/Kconfig"
  1271. endmenu
  1272. menu "Kernel Features"
  1273. config HAVE_SMP
  1274. bool
  1275. help
  1276. This option should be selected by machines which have an SMP-
  1277. capable CPU.
  1278. The only effect of this option is to make the SMP-related
  1279. options available to the user for configuration.
  1280. config SMP
  1281. bool "Symmetric Multi-Processing"
  1282. depends on CPU_V6K || CPU_V7
  1283. depends on GENERIC_CLOCKEVENTS
  1284. depends on HAVE_SMP
  1285. depends on MMU
  1286. select USE_GENERIC_SMP_HELPERS
  1287. select HAVE_ARM_SCU if !ARCH_MSM_SCORPIONMP
  1288. help
  1289. This enables support for systems with more than one CPU. If you have
  1290. a system with only one CPU, like most personal computers, say N. If
  1291. you have a system with more than one CPU, say Y.
  1292. If you say N here, the kernel will run on single and multiprocessor
  1293. machines, but will use only one CPU of a multiprocessor machine. If
  1294. you say Y here, the kernel will run on many, but not all, single
  1295. processor machines. On a single processor machine, the kernel will
  1296. run faster if you say N here.
  1297. See also <file:Documentation/x86/i386/IO-APIC.txt>,
  1298. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  1299. <http://tldp.org/HOWTO/SMP-HOWTO.html>.
  1300. If you don't know what to do here, say N.
  1301. config SMP_ON_UP
  1302. bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
  1303. depends on EXPERIMENTAL
  1304. depends on SMP && !XIP_KERNEL
  1305. default y
  1306. help
  1307. SMP kernels contain instructions which fail on non-SMP processors.
  1308. Enabling this option allows the kernel to modify itself to make
  1309. these instructions safe. Disabling it allows about 1K of space
  1310. savings.
  1311. If you don't know what to do here, say Y.
  1312. config ARM_CPU_TOPOLOGY
  1313. bool "Support cpu topology definition"
  1314. depends on SMP && CPU_V7
  1315. default y
  1316. help
  1317. Support ARM cpu topology definition. The MPIDR register defines
  1318. affinity between processors which is then used to describe the cpu
  1319. topology of an ARM System.
  1320. config SCHED_MC
  1321. bool "Multi-core scheduler support"
  1322. depends on ARM_CPU_TOPOLOGY
  1323. help
  1324. Multi-core scheduler support improves the CPU scheduler's decision
  1325. making when dealing with multi-core CPU chips at a cost of slightly
  1326. increased overhead in some places. If unsure say N here.
  1327. config SCHED_SMT
  1328. bool "SMT scheduler support"
  1329. depends on ARM_CPU_TOPOLOGY
  1330. help
  1331. Improves the CPU scheduler's decision making when dealing with
  1332. MultiThreading at a cost of slightly increased overhead in some
  1333. places. If unsure say N here.
  1334. config HAVE_ARM_SCU
  1335. bool
  1336. help
  1337. This option enables support for the ARM system coherency unit
  1338. config ARM_ARCH_TIMER
  1339. bool "Architected timer support"
  1340. depends on CPU_V7
  1341. help
  1342. This option enables support for the ARM architected timer
  1343. config HAVE_ARM_TWD
  1344. bool
  1345. depends on SMP
  1346. help
  1347. This options enables support for the ARM timer and watchdog unit
  1348. choice
  1349. prompt "Memory split"
  1350. default VMSPLIT_3G
  1351. help
  1352. Select the desired split between kernel and user memory.
  1353. If you are not absolutely sure what you are doing, leave this
  1354. option alone!
  1355. config VMSPLIT_3G
  1356. bool "3G/1G user/kernel split"
  1357. config VMSPLIT_2G
  1358. bool "2G/2G user/kernel split"
  1359. config VMSPLIT_1G
  1360. bool "1G/3G user/kernel split"
  1361. endchoice
  1362. config PAGE_OFFSET
  1363. hex
  1364. default 0x40000000 if VMSPLIT_1G
  1365. default 0x80000000 if VMSPLIT_2G
  1366. default 0xC0000000
  1367. config NR_CPUS
  1368. int "Maximum number of CPUs (2-32)"
  1369. range 2 32
  1370. depends on SMP
  1371. default "4"
  1372. config HOTPLUG_CPU
  1373. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  1374. depends on SMP && HOTPLUG && EXPERIMENTAL
  1375. help
  1376. Say Y here to experiment with turning CPUs off and on. CPUs
  1377. can be controlled through /sys/devices/system/cpu.
  1378. config LOCAL_TIMERS
  1379. bool "Use local timer interrupts"
  1380. depends on SMP
  1381. default y
  1382. select HAVE_ARM_TWD if (!ARCH_MSM_SCORPIONMP && !EXYNOS4_MCT)
  1383. help
  1384. Enable support for local timers on SMP platforms, rather then the
  1385. legacy IPI broadcast method. Local timers allows the system
  1386. accounting to be spread across the timer interval, preventing a
  1387. "thundering herd" at every timer tick.
  1388. config ARCH_NR_GPIO
  1389. int
  1390. default 1024 if ARCH_SHMOBILE || ARCH_TEGRA
  1391. default 355 if ARCH_U8500
  1392. default 264 if MACH_H4700
  1393. default 512 if SOC_OMAP5
  1394. default 0
  1395. help
  1396. Maximum number of GPIOs in the system.
  1397. If unsure, leave the default value.
  1398. source kernel/Kconfig.preempt
  1399. config HZ
  1400. int
  1401. default 200 if ARCH_EBSA110 || ARCH_S3C24XX || ARCH_S5P64X0 || \
  1402. ARCH_S5PV210 || ARCH_EXYNOS4
  1403. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  1404. default AT91_TIMER_HZ if ARCH_AT91
  1405. default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
  1406. default 100
  1407. config THUMB2_KERNEL
  1408. bool "Compile the kernel in Thumb-2 mode (EXPERIMENTAL)"
  1409. depends on CPU_V7 && !CPU_V6 && !CPU_V6K && EXPERIMENTAL
  1410. select AEABI
  1411. select ARM_ASM_UNIFIED
  1412. select ARM_UNWIND
  1413. help
  1414. By enabling this option, the kernel will be compiled in
  1415. Thumb-2 mode. A compiler/assembler that understand the unified
  1416. ARM-Thumb syntax is needed.
  1417. If unsure, say N.
  1418. config THUMB2_AVOID_R_ARM_THM_JUMP11
  1419. bool "Work around buggy Thumb-2 short branch relocations in gas"
  1420. depends on THUMB2_KERNEL && MODULES
  1421. default y
  1422. help
  1423. Various binutils versions can resolve Thumb-2 branches to
  1424. locally-defined, preemptible global symbols as short-range "b.n"
  1425. branch instructions.
  1426. This is a problem, because there's no guarantee the final
  1427. destination of the symbol, or any candidate locations for a
  1428. trampoline, are within range of the branch. For this reason, the
  1429. kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
  1430. relocation in modules at all, and it makes little sense to add
  1431. support.
  1432. The symptom is that the kernel fails with an "unsupported
  1433. relocation" error when loading some modules.
  1434. Until fixed tools are available, passing
  1435. -fno-optimize-sibling-calls to gcc should prevent gcc generating
  1436. code which hits this problem, at the cost of a bit of extra runtime
  1437. stack usage in some cases.
  1438. The problem is described in more detail at:
  1439. https://bugs.launchpad.net/binutils-linaro/+bug/725126
  1440. Only Thumb-2 kernels are affected.
  1441. Unless you are sure your tools don't have this problem, say Y.
  1442. config ARM_ASM_UNIFIED
  1443. bool
  1444. config AEABI
  1445. bool "Use the ARM EABI to compile the kernel"
  1446. help
  1447. This option allows for the kernel to be compiled using the latest
  1448. ARM ABI (aka EABI). This is only useful if you are using a user
  1449. space environment that is also compiled with EABI.
  1450. Since there are major incompatibilities between the legacy ABI and
  1451. EABI, especially with regard to structure member alignment, this
  1452. option also changes the kernel syscall calling convention to
  1453. disambiguate both ABIs and allow for backward compatibility support
  1454. (selected with CONFIG_OABI_COMPAT).
  1455. To use this you need GCC version 4.0.0 or later.
  1456. config OABI_COMPAT
  1457. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  1458. depends on AEABI && EXPERIMENTAL && !THUMB2_KERNEL
  1459. default y
  1460. help
  1461. This option preserves the old syscall interface along with the
  1462. new (ARM EABI) one. It also provides a compatibility layer to
  1463. intercept syscalls that have structure arguments which layout
  1464. in memory differs between the legacy ABI and the new ARM EABI
  1465. (only for non "thumb" binaries). This option adds a tiny
  1466. overhead to all syscalls and produces a slightly larger kernel.
  1467. If you know you'll be using only pure EABI user space then you
  1468. can say N here. If this option is not selected and you attempt
  1469. to execute a legacy ABI binary then the result will be
  1470. UNPREDICTABLE (in fact it can be predicted that it won't work
  1471. at all). If in doubt say Y.
  1472. config ARCH_HAS_HOLES_MEMORYMODEL
  1473. bool
  1474. config ARCH_SPARSEMEM_ENABLE
  1475. bool
  1476. config ARCH_SPARSEMEM_DEFAULT
  1477. def_bool ARCH_SPARSEMEM_ENABLE
  1478. config ARCH_SELECT_MEMORY_MODEL
  1479. def_bool ARCH_SPARSEMEM_ENABLE
  1480. config HAVE_ARCH_PFN_VALID
  1481. def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
  1482. config HIGHMEM
  1483. bool "High Memory Support"
  1484. depends on MMU
  1485. help
  1486. The address space of ARM processors is only 4 Gigabytes large
  1487. and it has to accommodate user address space, kernel address
  1488. space as well as some memory mapped IO. That means that, if you
  1489. have a large amount of physical memory and/or IO, not all of the
  1490. memory can be "permanently mapped" by the kernel. The physical
  1491. memory that is not permanently mapped is called "high memory".
  1492. Depending on the selected kernel/user memory split, minimum
  1493. vmalloc space and actual amount of RAM, you may not need this
  1494. option which should result in a slightly faster kernel.
  1495. If unsure, say n.
  1496. config HIGHPTE
  1497. bool "Allocate 2nd-level pagetables from highmem"
  1498. depends on HIGHMEM
  1499. config HW_PERF_EVENTS
  1500. bool "Enable hardware performance counter support for perf events"
  1501. depends on PERF_EVENTS && CPU_HAS_PMU
  1502. default y
  1503. help
  1504. Enable hardware performance counter support for perf events. If
  1505. disabled, perf events will use software events only.
  1506. source "mm/Kconfig"
  1507. config FORCE_MAX_ZONEORDER
  1508. int "Maximum zone order" if ARCH_SHMOBILE
  1509. range 11 64 if ARCH_SHMOBILE
  1510. default "9" if SA1111
  1511. default "11"
  1512. help
  1513. The kernel memory allocator divides physically contiguous memory
  1514. blocks into "zones", where each zone is a power of two number of
  1515. pages. This option selects the largest power of two that the kernel
  1516. keeps in the memory allocator. If you need to allocate very large
  1517. blocks of physically contiguous memory, then you may need to
  1518. increase this value.
  1519. This config option is actually maximum order plus one. For example,
  1520. a value of 11 means that the largest free memory block is 2^10 pages.
  1521. config LEDS
  1522. bool "Timer and CPU usage LEDs"
  1523. depends on ARCH_CDB89712 || ARCH_EBSA110 || \
  1524. ARCH_EBSA285 || ARCH_INTEGRATOR || \
  1525. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  1526. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  1527. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  1528. ARCH_AT91 || ARCH_DAVINCI || \
  1529. ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
  1530. help
  1531. If you say Y here, the LEDs on your machine will be used
  1532. to provide useful information about your current system status.
  1533. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  1534. be able to select which LEDs are active using the options below. If
  1535. you are compiling a kernel for the EBSA-110 or the LART however, the
  1536. red LED will simply flash regularly to indicate that the system is
  1537. still functional. It is safe to say Y here if you have a CATS
  1538. system, but the driver will do nothing.
  1539. config LEDS_TIMER
  1540. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  1541. OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1542. || MACH_OMAP_PERSEUS2
  1543. depends on LEDS
  1544. depends on !GENERIC_CLOCKEVENTS
  1545. default y if ARCH_EBSA110
  1546. help
  1547. If you say Y here, one of the system LEDs (the green one on the
  1548. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  1549. will flash regularly to indicate that the system is still
  1550. operational. This is mainly useful to kernel hackers who are
  1551. debugging unstable kernels.
  1552. The LART uses the same LED for both Timer LED and CPU usage LED
  1553. functions. You may choose to use both, but the Timer LED function
  1554. will overrule the CPU usage LED.
  1555. config LEDS_CPU
  1556. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  1557. !ARCH_OMAP) \
  1558. || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1559. || MACH_OMAP_PERSEUS2
  1560. depends on LEDS
  1561. help
  1562. If you say Y here, the red LED will be used to give a good real
  1563. time indication of CPU usage, by lighting whenever the idle task
  1564. is not currently executing.
  1565. The LART uses the same LED for both Timer LED and CPU usage LED
  1566. functions. You may choose to use both, but the Timer LED function
  1567. will overrule the CPU usage LED.
  1568. config ALIGNMENT_TRAP
  1569. bool
  1570. depends on CPU_CP15_MMU
  1571. default y if !ARCH_EBSA110
  1572. select HAVE_PROC_CPU if PROC_FS
  1573. help
  1574. ARM processors cannot fetch/store information which is not
  1575. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  1576. address divisible by 4. On 32-bit ARM processors, these non-aligned
  1577. fetch/store instructions will be emulated in software if you say
  1578. here, which has a severe performance impact. This is necessary for
  1579. correct operation of some network protocols. With an IP-only
  1580. configuration it is safe to say N, otherwise say Y.
  1581. config UACCESS_WITH_MEMCPY
  1582. bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
  1583. depends on MMU && EXPERIMENTAL
  1584. default y if CPU_FEROCEON
  1585. help
  1586. Implement faster copy_to_user and clear_user methods for CPU
  1587. cores where a 8-word STM instruction give significantly higher
  1588. memory write throughput than a sequence of individual 32bit stores.
  1589. A possible side effect is a slight increase in scheduling latency
  1590. between threads sharing the same address space if they invoke
  1591. such copy operations with large buffers.
  1592. However, if the CPU data cache is using a write-allocate mode,
  1593. this option is unlikely to provide any performance gain.
  1594. config SECCOMP
  1595. bool
  1596. prompt "Enable seccomp to safely compute untrusted bytecode"
  1597. ---help---
  1598. This kernel feature is useful for number crunching applications
  1599. that may need to compute untrusted bytecode during their
  1600. execution. By using pipes or other transports made available to
  1601. the process as file descriptors supporting the read/write
  1602. syscalls, it's possible to isolate those applications in
  1603. their own address space using seccomp. Once seccomp is
  1604. enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
  1605. and the task is only allowed to execute a few safe syscalls
  1606. defined by each seccomp mode.
  1607. config CC_STACKPROTECTOR
  1608. bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
  1609. depends on EXPERIMENTAL
  1610. help
  1611. This option turns on the -fstack-protector GCC feature. This
  1612. feature puts, at the beginning of functions, a canary value on
  1613. the stack just before the return address, and validates
  1614. the value just before actually returning. Stack based buffer
  1615. overflows (that need to overwrite this return address) now also
  1616. overwrite the canary, which gets detected and the attack is then
  1617. neutralized via a kernel panic.
  1618. This feature requires gcc version 4.2 or above.
  1619. config DEPRECATED_PARAM_STRUCT
  1620. bool "Provide old way to pass kernel parameters"
  1621. help
  1622. This was deprecated in 2001 and announced to live on for 5 years.
  1623. Some old boot loaders still use this way.
  1624. endmenu
  1625. menu "Boot options"
  1626. config USE_OF
  1627. bool "Flattened Device Tree support"
  1628. select OF
  1629. select OF_EARLY_FLATTREE
  1630. select IRQ_DOMAIN
  1631. help
  1632. Include support for flattened device tree machine descriptions.
  1633. # Compressed boot loader in ROM. Yes, we really want to ask about
  1634. # TEXT and BSS so we preserve their values in the config files.
  1635. config ZBOOT_ROM_TEXT
  1636. hex "Compressed ROM boot loader base address"
  1637. default "0"
  1638. help
  1639. The physical address at which the ROM-able zImage is to be
  1640. placed in the target. Platforms which normally make use of
  1641. ROM-able zImage formats normally set this to a suitable
  1642. value in their defconfig file.
  1643. If ZBOOT_ROM is not enabled, this has no effect.
  1644. config ZBOOT_ROM_BSS
  1645. hex "Compressed ROM boot loader BSS address"
  1646. default "0"
  1647. help
  1648. The base address of an area of read/write memory in the target
  1649. for the ROM-able zImage which must be available while the
  1650. decompressor is running. It must be large enough to hold the
  1651. entire decompressed kernel plus an additional 128 KiB.
  1652. Platforms which normally make use of ROM-able zImage formats
  1653. normally set this to a suitable value in their defconfig file.
  1654. If ZBOOT_ROM is not enabled, this has no effect.
  1655. config ZBOOT_ROM
  1656. bool "Compressed boot loader in ROM/flash"
  1657. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  1658. help
  1659. Say Y here if you intend to execute your compressed kernel image
  1660. (zImage) directly from ROM or flash. If unsure, say N.
  1661. choice
  1662. prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)"
  1663. depends on ZBOOT_ROM && ARCH_SH7372 && EXPERIMENTAL
  1664. default ZBOOT_ROM_NONE
  1665. help
  1666. Include experimental SD/MMC loading code in the ROM-able zImage.
  1667. With this enabled it is possible to write the ROM-able zImage
  1668. kernel image to an MMC or SD card and boot the kernel straight
  1669. from the reset vector. At reset the processor Mask ROM will load
  1670. the first part of the ROM-able zImage which in turn loads the
  1671. rest the kernel image to RAM.
  1672. config ZBOOT_ROM_NONE
  1673. bool "No SD/MMC loader in zImage (EXPERIMENTAL)"
  1674. help
  1675. Do not load image from SD or MMC
  1676. config ZBOOT_ROM_MMCIF
  1677. bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
  1678. help
  1679. Load image from MMCIF hardware block.
  1680. config ZBOOT_ROM_SH_MOBILE_SDHI
  1681. bool "Include SuperH Mobile SDHI loader in zImage (EXPERIMENTAL)"
  1682. help
  1683. Load image from SDHI hardware block
  1684. endchoice
  1685. config ARM_APPENDED_DTB
  1686. bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
  1687. depends on OF && !ZBOOT_ROM && EXPERIMENTAL
  1688. help
  1689. With this option, the boot code will look for a device tree binary
  1690. (DTB) appended to zImage
  1691. (e.g. cat zImage <filename>.dtb > zImage_w_dtb).
  1692. This is meant as a backward compatibility convenience for those
  1693. systems with a bootloader that can't be upgraded to accommodate
  1694. the documented boot protocol using a device tree.
  1695. Beware that there is very little in terms of protection against
  1696. this option being confused by leftover garbage in memory that might
  1697. look like a DTB header after a reboot if no actual DTB is appended
  1698. to zImage. Do not leave this option active in a production kernel
  1699. if you don't intend to always append a DTB. Proper passing of the
  1700. location into r2 of a bootloader provided DTB is always preferable
  1701. to this option.
  1702. config ARM_ATAG_DTB_COMPAT
  1703. bool "Supplement the appended DTB with traditional ATAG information"
  1704. depends on ARM_APPENDED_DTB
  1705. help
  1706. Some old bootloaders can't be updated to a DTB capable one, yet
  1707. they provide ATAGs with memory configuration, the ramdisk address,
  1708. the kernel cmdline string, etc. Such information is dynamically
  1709. provided by the bootloader and can't always be stored in a static
  1710. DTB. To allow a device tree enabled kernel to be used with such
  1711. bootloaders, this option allows zImage to extract the information
  1712. from the ATAG list and store it at run time into the appended DTB.
  1713. config CMDLINE
  1714. string "Default kernel command string"
  1715. default ""
  1716. help
  1717. On some architectures (EBSA110 and CATS), there is currently no way
  1718. for the boot loader to pass arguments to the kernel. For these
  1719. architectures, you should supply some command-line options at build
  1720. time by entering them here. As a minimum, you should specify the
  1721. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  1722. choice
  1723. prompt "Kernel command line type" if CMDLINE != ""
  1724. default CMDLINE_FROM_BOOTLOADER
  1725. config CMDLINE_FROM_BOOTLOADER
  1726. bool "Use bootloader kernel arguments if available"
  1727. help
  1728. Uses the command-line options passed by the boot loader. If
  1729. the boot loader doesn't provide any, the default kernel command
  1730. string provided in CMDLINE will be used.
  1731. config CMDLINE_EXTEND
  1732. bool "Extend bootloader kernel arguments"
  1733. help
  1734. The command-line arguments provided by the boot loader will be
  1735. appended to the default kernel command string.
  1736. config CMDLINE_FORCE
  1737. bool "Always use the default kernel command string"
  1738. help
  1739. Always use the default kernel command string, even if the boot
  1740. loader passes other arguments to the kernel.
  1741. This is useful if you cannot or don't want to change the
  1742. command-line options your boot loader passes to the kernel.
  1743. endchoice
  1744. config XIP_KERNEL
  1745. bool "Kernel Execute-In-Place from ROM"
  1746. depends on !ZBOOT_ROM && !ARM_LPAE
  1747. help
  1748. Execute-In-Place allows the kernel to run from non-volatile storage
  1749. directly addressable by the CPU, such as NOR flash. This saves RAM
  1750. space since the text section of the kernel is not loaded from flash
  1751. to RAM. Read-write sections, such as the data section and stack,
  1752. are still copied to RAM. The XIP kernel is not compressed since
  1753. it has to run directly from flash, so it will take more space to
  1754. store it. The flash address used to link the kernel object files,
  1755. and for storing it, is configuration dependent. Therefore, if you
  1756. say Y here, you must know the proper physical address where to
  1757. store the kernel image depending on your own flash memory usage.
  1758. Also note that the make target becomes "make xipImage" rather than
  1759. "make zImage" or "make Image". The final kernel binary to put in
  1760. ROM memory will be arch/arm/boot/xipImage.
  1761. If unsure, say N.
  1762. config XIP_PHYS_ADDR
  1763. hex "XIP Kernel Physical Location"
  1764. depends on XIP_KERNEL
  1765. default "0x00080000"
  1766. help
  1767. This is the physical address in your flash memory the kernel will
  1768. be linked for and stored to. This address is dependent on your
  1769. own flash usage.
  1770. config KEXEC
  1771. bool "Kexec system call (EXPERIMENTAL)"
  1772. depends on EXPERIMENTAL && (!SMP || HOTPLUG_CPU)
  1773. help
  1774. kexec is a system call that implements the ability to shutdown your
  1775. current kernel, and to start another kernel. It is like a reboot
  1776. but it is independent of the system firmware. And like a reboot
  1777. you can start any kernel with it, not just Linux.
  1778. It is an ongoing process to be certain the hardware in a machine
  1779. is properly shutdown, so do not be surprised if this code does not
  1780. initially work for you. It may help to enable device hotplugging
  1781. support.
  1782. config ATAGS_PROC
  1783. bool "Export atags in procfs"
  1784. depends on KEXEC
  1785. default y
  1786. help
  1787. Should the atags used to boot the kernel be exported in an "atags"
  1788. file in procfs. Useful with kexec.
  1789. config CRASH_DUMP
  1790. bool "Build kdump crash kernel (EXPERIMENTAL)"
  1791. depends on EXPERIMENTAL
  1792. help
  1793. Generate crash dump after being started by kexec. This should
  1794. be normally only set in special crash dump kernels which are
  1795. loaded in the main kernel with kexec-tools into a specially
  1796. reserved region and then later executed after a crash by
  1797. kdump/kexec. The crash dump kernel must be compiled to a
  1798. memory address not used by the main kernel
  1799. For more details see Documentation/kdump/kdump.txt
  1800. config AUTO_ZRELADDR
  1801. bool "Auto calculation of the decompressed kernel image address"
  1802. depends on !ZBOOT_ROM && !ARCH_U300
  1803. help
  1804. ZRELADDR is the physical address where the decompressed kernel
  1805. image will be placed. If AUTO_ZRELADDR is selected, the address
  1806. will be determined at run-time by masking the current IP with
  1807. 0xf8000000. This assumes the zImage being placed in the first 128MB
  1808. from start of memory.
  1809. endmenu
  1810. menu "CPU Power Management"
  1811. if ARCH_HAS_CPUFREQ
  1812. source "drivers/cpufreq/Kconfig"
  1813. config CPU_FREQ_IMX
  1814. tristate "CPUfreq driver for i.MX CPUs"
  1815. depends on ARCH_MXC && CPU_FREQ
  1816. help
  1817. This enables the CPUfreq driver for i.MX CPUs.
  1818. config CPU_FREQ_SA1100
  1819. bool
  1820. config CPU_FREQ_SA1110
  1821. bool
  1822. config CPU_FREQ_INTEGRATOR
  1823. tristate "CPUfreq driver for ARM Integrator CPUs"
  1824. depends on ARCH_INTEGRATOR && CPU_FREQ
  1825. default y
  1826. help
  1827. This enables the CPUfreq driver for ARM Integrator CPUs.
  1828. For details, take a look at <file:Documentation/cpu-freq>.
  1829. If in doubt, say Y.
  1830. config CPU_FREQ_PXA
  1831. bool
  1832. depends on CPU_FREQ && ARCH_PXA && PXA25x
  1833. default y
  1834. select CPU_FREQ_TABLE
  1835. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  1836. config CPU_FREQ_S3C
  1837. bool
  1838. help
  1839. Internal configuration node for common cpufreq on Samsung SoC
  1840. config CPU_FREQ_S3C24XX
  1841. bool "CPUfreq driver for Samsung S3C24XX series CPUs (EXPERIMENTAL)"
  1842. depends on ARCH_S3C24XX && CPU_FREQ && EXPERIMENTAL
  1843. select CPU_FREQ_S3C
  1844. help
  1845. This enables the CPUfreq driver for the Samsung S3C24XX family
  1846. of CPUs.
  1847. For details, take a look at <file:Documentation/cpu-freq>.
  1848. If in doubt, say N.
  1849. config CPU_FREQ_S3C24XX_PLL
  1850. bool "Support CPUfreq changing of PLL frequency (EXPERIMENTAL)"
  1851. depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
  1852. help
  1853. Compile in support for changing the PLL frequency from the
  1854. S3C24XX series CPUfreq driver. The PLL takes time to settle
  1855. after a frequency change, so by default it is not enabled.
  1856. This also means that the PLL tables for the selected CPU(s) will
  1857. be built which may increase the size of the kernel image.
  1858. config CPU_FREQ_S3C24XX_DEBUG
  1859. bool "Debug CPUfreq Samsung driver core"
  1860. depends on CPU_FREQ_S3C24XX
  1861. help
  1862. Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
  1863. config CPU_FREQ_S3C24XX_IODEBUG
  1864. bool "Debug CPUfreq Samsung driver IO timing"
  1865. depends on CPU_FREQ_S3C24XX
  1866. help
  1867. Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
  1868. config CPU_FREQ_S3C24XX_DEBUGFS
  1869. bool "Export debugfs for CPUFreq"
  1870. depends on CPU_FREQ_S3C24XX && DEBUG_FS
  1871. help
  1872. Export status information via debugfs.
  1873. endif
  1874. source "drivers/cpuidle/Kconfig"
  1875. endmenu
  1876. menu "Floating point emulation"
  1877. comment "At least one emulation must be selected"
  1878. config FPE_NWFPE
  1879. bool "NWFPE math emulation"
  1880. depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
  1881. ---help---
  1882. Say Y to include the NWFPE floating point emulator in the kernel.
  1883. This is necessary to run most binaries. Linux does not currently
  1884. support floating point hardware so you need to say Y here even if
  1885. your machine has an FPA or floating point co-processor podule.
  1886. You may say N here if you are going to load the Acorn FPEmulator
  1887. early in the bootup.
  1888. config FPE_NWFPE_XP
  1889. bool "Support extended precision"
  1890. depends on FPE_NWFPE
  1891. help
  1892. Say Y to include 80-bit support in the kernel floating-point
  1893. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  1894. Note that gcc does not generate 80-bit operations by default,
  1895. so in most cases this option only enlarges the size of the
  1896. floating point emulator without any good reason.
  1897. You almost surely want to say N here.
  1898. config FPE_FASTFPE
  1899. bool "FastFPE math emulation (EXPERIMENTAL)"
  1900. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  1901. ---help---
  1902. Say Y here to include the FAST floating point emulator in the kernel.
  1903. This is an experimental much faster emulator which now also has full
  1904. precision for the mantissa. It does not support any exceptions.
  1905. It is very simple, and approximately 3-6 times faster than NWFPE.
  1906. It should be sufficient for most programs. It may be not suitable
  1907. for scientific calculations, but you have to check this for yourself.
  1908. If you do not feel you need a faster FP emulation you should better
  1909. choose NWFPE.
  1910. config VFP
  1911. bool "VFP-format floating point maths"
  1912. depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  1913. help
  1914. Say Y to include VFP support code in the kernel. This is needed
  1915. if your hardware includes a VFP unit.
  1916. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  1917. release notes and additional status information.
  1918. Say N if your target does not have VFP hardware.
  1919. config VFPv3
  1920. bool
  1921. depends on VFP
  1922. default y if CPU_V7
  1923. config NEON
  1924. bool "Advanced SIMD (NEON) Extension support"
  1925. depends on VFPv3 && CPU_V7
  1926. help
  1927. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  1928. Extension.
  1929. endmenu
  1930. menu "Userspace binary formats"
  1931. source "fs/Kconfig.binfmt"
  1932. config ARTHUR
  1933. tristate "RISC OS personality"
  1934. depends on !AEABI
  1935. help
  1936. Say Y here to include the kernel code necessary if you want to run
  1937. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  1938. experimental; if this sounds frightening, say N and sleep in peace.
  1939. You can also say M here to compile this support as a module (which
  1940. will be called arthur).
  1941. endmenu
  1942. menu "Power management options"
  1943. source "kernel/power/Kconfig"
  1944. config ARCH_SUSPEND_POSSIBLE
  1945. depends on !ARCH_S5PC100 && !ARCH_TEGRA
  1946. depends on CPU_ARM920T || CPU_ARM926T || CPU_SA1100 || \
  1947. CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE || CPU_MOHAWK
  1948. def_bool y
  1949. config ARM_CPU_SUSPEND
  1950. def_bool PM_SLEEP
  1951. endmenu
  1952. source "net/Kconfig"
  1953. source "drivers/Kconfig"
  1954. source "fs/Kconfig"
  1955. source "arch/arm/Kconfig.debug"
  1956. source "security/Kconfig"
  1957. source "crypto/Kconfig"
  1958. source "lib/Kconfig"