Kconfig 67 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 ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
  15. select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
  16. select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL
  17. select HAVE_ARCH_KGDB
  18. select HAVE_ARCH_TRACEHOOK
  19. select HAVE_KPROBES if !XIP_KERNEL
  20. select HAVE_KRETPROBES if (HAVE_KPROBES)
  21. select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
  22. select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
  23. select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL)
  24. select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL)
  25. select ARCH_BINFMT_ELF_RANDOMIZE_PIE
  26. select HAVE_GENERIC_DMA_COHERENT
  27. select HAVE_KERNEL_GZIP
  28. select HAVE_KERNEL_LZO
  29. select HAVE_KERNEL_LZMA
  30. select HAVE_KERNEL_XZ
  31. select HAVE_IRQ_WORK
  32. select HAVE_PERF_EVENTS
  33. select PERF_USE_VMALLOC
  34. select HAVE_REGS_AND_STACK_ACCESS_API
  35. select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7))
  36. select HAVE_C_RECORDMCOUNT
  37. select HAVE_GENERIC_HARDIRQS
  38. select HARDIRQS_SW_RESEND
  39. select GENERIC_IRQ_PROBE
  40. select GENERIC_IRQ_SHOW
  41. select GENERIC_IRQ_PROBE
  42. select ARCH_WANT_IPC_PARSE_VERSION
  43. select HARDIRQS_SW_RESEND
  44. select CPU_PM if (SUSPEND || CPU_IDLE)
  45. select GENERIC_PCI_IOMAP
  46. select HAVE_BPF_JIT
  47. select GENERIC_SMP_IDLE_THREAD
  48. select KTIME_SCALAR
  49. select GENERIC_CLOCKEVENTS_BROADCAST if SMP
  50. select GENERIC_STRNCPY_FROM_USER
  51. select GENERIC_STRNLEN_USER
  52. select DCACHE_WORD_ACCESS if (CPU_V6 || CPU_V6K || CPU_V7) && !CPU_BIG_ENDIAN
  53. help
  54. The ARM series is a line of low-power-consumption RISC chip designs
  55. licensed by ARM Ltd and targeted at embedded applications and
  56. handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
  57. manufactured, but legacy ARM-based PC hardware remains popular in
  58. Europe. There is an ARM Linux project with a web page at
  59. <http://www.arm.linux.org.uk/>.
  60. config ARM_HAS_SG_CHAIN
  61. bool
  62. config NEED_SG_DMA_LENGTH
  63. bool
  64. config ARM_DMA_USE_IOMMU
  65. select NEED_SG_DMA_LENGTH
  66. select ARM_HAS_SG_CHAIN
  67. bool
  68. config HAVE_PWM
  69. bool
  70. config MIGHT_HAVE_PCI
  71. bool
  72. config SYS_SUPPORTS_APM_EMULATION
  73. bool
  74. config GENERIC_GPIO
  75. bool
  76. config HAVE_TCM
  77. bool
  78. select GENERIC_ALLOCATOR
  79. config HAVE_PROC_CPU
  80. bool
  81. config NO_IOPORT
  82. bool
  83. config EISA
  84. bool
  85. ---help---
  86. The Extended Industry Standard Architecture (EISA) bus was
  87. developed as an open alternative to the IBM MicroChannel bus.
  88. The EISA bus provided some of the features of the IBM MicroChannel
  89. bus while maintaining backward compatibility with cards made for
  90. the older ISA bus. The EISA bus saw limited use between 1988 and
  91. 1995 when it was made obsolete by the PCI bus.
  92. Say Y here if you are building a kernel for an EISA-based machine.
  93. Otherwise, say N.
  94. config SBUS
  95. bool
  96. config STACKTRACE_SUPPORT
  97. bool
  98. default y
  99. config HAVE_LATENCYTOP_SUPPORT
  100. bool
  101. depends on !SMP
  102. default y
  103. config LOCKDEP_SUPPORT
  104. bool
  105. default y
  106. config TRACE_IRQFLAGS_SUPPORT
  107. bool
  108. default y
  109. config RWSEM_GENERIC_SPINLOCK
  110. bool
  111. default y
  112. config RWSEM_XCHGADD_ALGORITHM
  113. bool
  114. config ARCH_HAS_ILOG2_U32
  115. bool
  116. config ARCH_HAS_ILOG2_U64
  117. bool
  118. config ARCH_HAS_CPUFREQ
  119. bool
  120. help
  121. Internal node to signify that the ARCH has CPUFREQ support
  122. and that the relevant menu configurations are displayed for
  123. it.
  124. config GENERIC_HWEIGHT
  125. bool
  126. default y
  127. config GENERIC_CALIBRATE_DELAY
  128. bool
  129. default y
  130. config ARCH_MAY_HAVE_PC_FDC
  131. bool
  132. config ZONE_DMA
  133. bool
  134. config NEED_DMA_MAP_STATE
  135. def_bool y
  136. config ARCH_HAS_DMA_SET_COHERENT_MASK
  137. bool
  138. config GENERIC_ISA_DMA
  139. bool
  140. config FIQ
  141. bool
  142. config NEED_RET_TO_USER
  143. bool
  144. config ARCH_MTD_XIP
  145. bool
  146. config VECTORS_BASE
  147. hex
  148. default 0xffff0000 if MMU || CPU_HIGH_VECTOR
  149. default DRAM_BASE if REMAP_VECTORS_TO_RAM
  150. default 0x00000000
  151. help
  152. The base address of exception vectors.
  153. config ARM_PATCH_PHYS_VIRT
  154. bool "Patch physical to virtual translations at runtime" if EMBEDDED
  155. default y
  156. depends on !XIP_KERNEL && MMU
  157. depends on !ARCH_REALVIEW || !SPARSEMEM
  158. help
  159. Patch phys-to-virt and virt-to-phys translation functions at
  160. boot and module load time according to the position of the
  161. kernel in system memory.
  162. This can only be used with non-XIP MMU kernels where the base
  163. of physical memory is at a 16MB boundary.
  164. Only disable this option if you know that you do not require
  165. this feature (eg, building a kernel for a single machine) and
  166. you need to shrink the kernel to the minimal size.
  167. config NEED_MACH_IO_H
  168. bool
  169. help
  170. Select this when mach/io.h is required to provide special
  171. definitions for this platform. The need for mach/io.h should
  172. be avoided when possible.
  173. config NEED_MACH_MEMORY_H
  174. bool
  175. help
  176. Select this when mach/memory.h is required to provide special
  177. definitions for this platform. The need for mach/memory.h should
  178. be avoided when possible.
  179. config PHYS_OFFSET
  180. hex "Physical address of main memory" if MMU
  181. depends on !ARM_PATCH_PHYS_VIRT && !NEED_MACH_MEMORY_H
  182. default DRAM_BASE if !MMU
  183. help
  184. Please provide the physical address corresponding to the
  185. location of main memory in your system.
  186. config GENERIC_BUG
  187. def_bool y
  188. depends on BUG
  189. source "init/Kconfig"
  190. source "kernel/Kconfig.freezer"
  191. menu "System Type"
  192. config MMU
  193. bool "MMU-based Paged Memory Management Support"
  194. default y
  195. help
  196. Select if you want MMU-based virtualised addressing space
  197. support by paged memory management. If unsure, say 'Y'.
  198. #
  199. # The "ARM system type" choice list is ordered alphabetically by option
  200. # text. Please add new entries in the option alphabetic order.
  201. #
  202. choice
  203. prompt "ARM system type"
  204. default ARCH_VERSATILE
  205. config ARCH_SOCFPGA
  206. bool "Altera SOCFPGA family"
  207. select ARCH_WANT_OPTIONAL_GPIOLIB
  208. select ARM_AMBA
  209. select ARM_GIC
  210. select CACHE_L2X0
  211. select CLKDEV_LOOKUP
  212. select COMMON_CLK
  213. select CPU_V7
  214. select DW_APB_TIMER
  215. select DW_APB_TIMER_OF
  216. select GENERIC_CLOCKEVENTS
  217. select GPIO_PL061 if GPIOLIB
  218. select HAVE_ARM_SCU
  219. select SPARSE_IRQ
  220. select USE_OF
  221. help
  222. This enables support for Altera SOCFPGA Cyclone V platform
  223. config ARCH_INTEGRATOR
  224. bool "ARM Ltd. Integrator family"
  225. select ARM_AMBA
  226. select ARCH_HAS_CPUFREQ
  227. select COMMON_CLK
  228. select CLK_VERSATILE
  229. select HAVE_TCM
  230. select ICST
  231. select GENERIC_CLOCKEVENTS
  232. select PLAT_VERSATILE
  233. select PLAT_VERSATILE_FPGA_IRQ
  234. select NEED_MACH_IO_H
  235. select NEED_MACH_MEMORY_H
  236. select SPARSE_IRQ
  237. select MULTI_IRQ_HANDLER
  238. help
  239. Support for ARM's Integrator platform.
  240. config ARCH_REALVIEW
  241. bool "ARM Ltd. RealView family"
  242. select ARM_AMBA
  243. select CLKDEV_LOOKUP
  244. select HAVE_MACH_CLKDEV
  245. select ICST
  246. select GENERIC_CLOCKEVENTS
  247. select ARCH_WANT_OPTIONAL_GPIOLIB
  248. select PLAT_VERSATILE
  249. select PLAT_VERSATILE_CLOCK
  250. select PLAT_VERSATILE_CLCD
  251. select ARM_TIMER_SP804
  252. select GPIO_PL061 if GPIOLIB
  253. select NEED_MACH_MEMORY_H
  254. help
  255. This enables support for ARM Ltd RealView boards.
  256. config ARCH_VERSATILE
  257. bool "ARM Ltd. Versatile family"
  258. select ARM_AMBA
  259. select ARM_VIC
  260. select CLKDEV_LOOKUP
  261. select HAVE_MACH_CLKDEV
  262. select ICST
  263. select GENERIC_CLOCKEVENTS
  264. select ARCH_WANT_OPTIONAL_GPIOLIB
  265. select NEED_MACH_IO_H if PCI
  266. select PLAT_VERSATILE
  267. select PLAT_VERSATILE_CLOCK
  268. select PLAT_VERSATILE_CLCD
  269. select PLAT_VERSATILE_FPGA_IRQ
  270. select ARM_TIMER_SP804
  271. help
  272. This enables support for ARM Ltd Versatile board.
  273. config ARCH_VEXPRESS
  274. bool "ARM Ltd. Versatile Express family"
  275. select ARCH_WANT_OPTIONAL_GPIOLIB
  276. select ARM_AMBA
  277. select ARM_TIMER_SP804
  278. select CLKDEV_LOOKUP
  279. select COMMON_CLK
  280. select GENERIC_CLOCKEVENTS
  281. select HAVE_CLK
  282. select HAVE_PATA_PLATFORM
  283. select ICST
  284. select NO_IOPORT
  285. select PLAT_VERSATILE
  286. select PLAT_VERSATILE_CLCD
  287. select REGULATOR_FIXED_VOLTAGE if REGULATOR
  288. help
  289. This enables support for the ARM Ltd Versatile Express boards.
  290. config ARCH_AT91
  291. bool "Atmel AT91"
  292. select ARCH_REQUIRE_GPIOLIB
  293. select HAVE_CLK
  294. select CLKDEV_LOOKUP
  295. select IRQ_DOMAIN
  296. select NEED_MACH_IO_H if PCCARD
  297. help
  298. This enables support for systems based on Atmel
  299. AT91RM9200 and AT91SAM9* processors.
  300. config ARCH_BCMRING
  301. bool "Broadcom BCMRING"
  302. depends on MMU
  303. select CPU_V6
  304. select ARM_AMBA
  305. select ARM_TIMER_SP804
  306. select CLKDEV_LOOKUP
  307. select GENERIC_CLOCKEVENTS
  308. select ARCH_WANT_OPTIONAL_GPIOLIB
  309. help
  310. Support for Broadcom's BCMRing platform.
  311. config ARCH_HIGHBANK
  312. bool "Calxeda Highbank-based"
  313. select ARCH_WANT_OPTIONAL_GPIOLIB
  314. select ARM_AMBA
  315. select ARM_GIC
  316. select ARM_TIMER_SP804
  317. select CACHE_L2X0
  318. select CLKDEV_LOOKUP
  319. select COMMON_CLK
  320. select CPU_V7
  321. select GENERIC_CLOCKEVENTS
  322. select HAVE_ARM_SCU
  323. select HAVE_SMP
  324. select SPARSE_IRQ
  325. select USE_OF
  326. help
  327. Support for the Calxeda Highbank SoC based boards.
  328. config ARCH_CLPS711X
  329. bool "Cirrus Logic CLPS711x/EP721x/EP731x-based"
  330. select CPU_ARM720T
  331. select ARCH_USES_GETTIMEOFFSET
  332. select NEED_MACH_MEMORY_H
  333. help
  334. Support for Cirrus Logic 711x/721x/731x based boards.
  335. config ARCH_CNS3XXX
  336. bool "Cavium Networks CNS3XXX family"
  337. select CPU_V6K
  338. select GENERIC_CLOCKEVENTS
  339. select ARM_GIC
  340. select MIGHT_HAVE_CACHE_L2X0
  341. select MIGHT_HAVE_PCI
  342. select PCI_DOMAINS if PCI
  343. help
  344. Support for Cavium Networks CNS3XXX platform.
  345. config ARCH_GEMINI
  346. bool "Cortina Systems Gemini"
  347. select CPU_FA526
  348. select ARCH_REQUIRE_GPIOLIB
  349. select ARCH_USES_GETTIMEOFFSET
  350. help
  351. Support for the Cortina Systems Gemini family SoCs
  352. config ARCH_PRIMA2
  353. bool "CSR SiRFSoC PRIMA2 ARM Cortex A9 Platform"
  354. select CPU_V7
  355. select NO_IOPORT
  356. select ARCH_REQUIRE_GPIOLIB
  357. select GENERIC_CLOCKEVENTS
  358. select CLKDEV_LOOKUP
  359. select GENERIC_IRQ_CHIP
  360. select MIGHT_HAVE_CACHE_L2X0
  361. select PINCTRL
  362. select PINCTRL_SIRF
  363. select USE_OF
  364. select ZONE_DMA
  365. help
  366. Support for CSR SiRFSoC ARM Cortex A9 Platform
  367. config ARCH_EBSA110
  368. bool "EBSA-110"
  369. select CPU_SA110
  370. select ISA
  371. select NO_IOPORT
  372. select ARCH_USES_GETTIMEOFFSET
  373. select NEED_MACH_IO_H
  374. select NEED_MACH_MEMORY_H
  375. help
  376. This is an evaluation board for the StrongARM processor available
  377. from Digital. It has limited hardware on-board, including an
  378. Ethernet interface, two PCMCIA sockets, two serial ports and a
  379. parallel port.
  380. config ARCH_EP93XX
  381. bool "EP93xx-based"
  382. select CPU_ARM920T
  383. select ARM_AMBA
  384. select ARM_VIC
  385. select CLKDEV_LOOKUP
  386. select ARCH_REQUIRE_GPIOLIB
  387. select ARCH_HAS_HOLES_MEMORYMODEL
  388. select ARCH_USES_GETTIMEOFFSET
  389. select NEED_MACH_MEMORY_H
  390. help
  391. This enables support for the Cirrus EP93xx series of CPUs.
  392. config ARCH_FOOTBRIDGE
  393. bool "FootBridge"
  394. select CPU_SA110
  395. select FOOTBRIDGE
  396. select GENERIC_CLOCKEVENTS
  397. select HAVE_IDE
  398. select NEED_MACH_IO_H
  399. select NEED_MACH_MEMORY_H
  400. help
  401. Support for systems based on the DC21285 companion chip
  402. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  403. config ARCH_MXC
  404. bool "Freescale MXC/iMX-based"
  405. select GENERIC_CLOCKEVENTS
  406. select ARCH_REQUIRE_GPIOLIB
  407. select CLKDEV_LOOKUP
  408. select CLKSRC_MMIO
  409. select GENERIC_IRQ_CHIP
  410. select MULTI_IRQ_HANDLER
  411. select SPARSE_IRQ
  412. select USE_OF
  413. help
  414. Support for Freescale MXC/iMX-based family of processors
  415. config ARCH_MXS
  416. bool "Freescale MXS-based"
  417. select GENERIC_CLOCKEVENTS
  418. select ARCH_REQUIRE_GPIOLIB
  419. select CLKDEV_LOOKUP
  420. select CLKSRC_MMIO
  421. select COMMON_CLK
  422. select HAVE_CLK_PREPARE
  423. select PINCTRL
  424. select USE_OF
  425. help
  426. Support for Freescale MXS-based family of processors
  427. config ARCH_NETX
  428. bool "Hilscher NetX based"
  429. select CLKSRC_MMIO
  430. select CPU_ARM926T
  431. select ARM_VIC
  432. select GENERIC_CLOCKEVENTS
  433. help
  434. This enables support for systems based on the Hilscher NetX Soc
  435. config ARCH_H720X
  436. bool "Hynix HMS720x-based"
  437. select CPU_ARM720T
  438. select ISA_DMA_API
  439. select ARCH_USES_GETTIMEOFFSET
  440. help
  441. This enables support for systems based on the Hynix HMS720x
  442. config ARCH_IOP13XX
  443. bool "IOP13xx-based"
  444. depends on MMU
  445. select CPU_XSC3
  446. select PLAT_IOP
  447. select PCI
  448. select ARCH_SUPPORTS_MSI
  449. select VMSPLIT_1G
  450. select NEED_MACH_IO_H
  451. select NEED_MACH_MEMORY_H
  452. select NEED_RET_TO_USER
  453. help
  454. Support for Intel's IOP13XX (XScale) family of processors.
  455. config ARCH_IOP32X
  456. bool "IOP32x-based"
  457. depends on MMU
  458. select CPU_XSCALE
  459. select NEED_MACH_IO_H
  460. select NEED_RET_TO_USER
  461. select PLAT_IOP
  462. select PCI
  463. select ARCH_REQUIRE_GPIOLIB
  464. help
  465. Support for Intel's 80219 and IOP32X (XScale) family of
  466. processors.
  467. config ARCH_IOP33X
  468. bool "IOP33x-based"
  469. depends on MMU
  470. select CPU_XSCALE
  471. select NEED_MACH_IO_H
  472. select NEED_RET_TO_USER
  473. select PLAT_IOP
  474. select PCI
  475. select ARCH_REQUIRE_GPIOLIB
  476. help
  477. Support for Intel's IOP33X (XScale) family of processors.
  478. config ARCH_IXP4XX
  479. bool "IXP4xx-based"
  480. depends on MMU
  481. select ARCH_HAS_DMA_SET_COHERENT_MASK
  482. select CLKSRC_MMIO
  483. select CPU_XSCALE
  484. select ARCH_REQUIRE_GPIOLIB
  485. select GENERIC_CLOCKEVENTS
  486. select MIGHT_HAVE_PCI
  487. select NEED_MACH_IO_H
  488. select DMABOUNCE if PCI
  489. help
  490. Support for Intel's IXP4XX (XScale) family of processors.
  491. config ARCH_MVEBU
  492. bool "Marvell SOCs with Device Tree support"
  493. select GENERIC_CLOCKEVENTS
  494. select MULTI_IRQ_HANDLER
  495. select SPARSE_IRQ
  496. select CLKSRC_MMIO
  497. select GENERIC_IRQ_CHIP
  498. select IRQ_DOMAIN
  499. select COMMON_CLK
  500. help
  501. Support for the Marvell SoC Family with device tree support
  502. config ARCH_DOVE
  503. bool "Marvell Dove"
  504. select CPU_V7
  505. select PCI
  506. select ARCH_REQUIRE_GPIOLIB
  507. select GENERIC_CLOCKEVENTS
  508. select NEED_MACH_IO_H
  509. select PLAT_ORION
  510. help
  511. Support for the Marvell Dove SoC 88AP510
  512. config ARCH_KIRKWOOD
  513. bool "Marvell Kirkwood"
  514. select CPU_FEROCEON
  515. select PCI
  516. select ARCH_REQUIRE_GPIOLIB
  517. select GENERIC_CLOCKEVENTS
  518. select NEED_MACH_IO_H
  519. select PLAT_ORION
  520. help
  521. Support for the following Marvell Kirkwood series SoCs:
  522. 88F6180, 88F6192 and 88F6281.
  523. config ARCH_LPC32XX
  524. bool "NXP LPC32XX"
  525. select CLKSRC_MMIO
  526. select CPU_ARM926T
  527. select ARCH_REQUIRE_GPIOLIB
  528. select HAVE_IDE
  529. select ARM_AMBA
  530. select USB_ARCH_HAS_OHCI
  531. select CLKDEV_LOOKUP
  532. select GENERIC_CLOCKEVENTS
  533. select USE_OF
  534. select HAVE_PWM
  535. help
  536. Support for the NXP LPC32XX family of processors
  537. config ARCH_MV78XX0
  538. bool "Marvell MV78xx0"
  539. select CPU_FEROCEON
  540. select PCI
  541. select ARCH_REQUIRE_GPIOLIB
  542. select GENERIC_CLOCKEVENTS
  543. select NEED_MACH_IO_H
  544. select PLAT_ORION
  545. help
  546. Support for the following Marvell MV78xx0 series SoCs:
  547. MV781x0, MV782x0.
  548. config ARCH_ORION5X
  549. bool "Marvell Orion"
  550. depends on MMU
  551. select CPU_FEROCEON
  552. select PCI
  553. select ARCH_REQUIRE_GPIOLIB
  554. select GENERIC_CLOCKEVENTS
  555. select NEED_MACH_IO_H
  556. select PLAT_ORION
  557. help
  558. Support for the following Marvell Orion 5x series SoCs:
  559. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  560. Orion-2 (5281), Orion-1-90 (6183).
  561. config ARCH_MMP
  562. bool "Marvell PXA168/910/MMP2"
  563. depends on MMU
  564. select ARCH_REQUIRE_GPIOLIB
  565. select CLKDEV_LOOKUP
  566. select GENERIC_CLOCKEVENTS
  567. select GPIO_PXA
  568. select IRQ_DOMAIN
  569. select PLAT_PXA
  570. select SPARSE_IRQ
  571. select GENERIC_ALLOCATOR
  572. help
  573. Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
  574. config ARCH_KS8695
  575. bool "Micrel/Kendin KS8695"
  576. select CPU_ARM922T
  577. select ARCH_REQUIRE_GPIOLIB
  578. select ARCH_USES_GETTIMEOFFSET
  579. select NEED_MACH_MEMORY_H
  580. help
  581. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  582. System-on-Chip devices.
  583. config ARCH_W90X900
  584. bool "Nuvoton W90X900 CPU"
  585. select CPU_ARM926T
  586. select ARCH_REQUIRE_GPIOLIB
  587. select CLKDEV_LOOKUP
  588. select CLKSRC_MMIO
  589. select GENERIC_CLOCKEVENTS
  590. help
  591. Support for Nuvoton (Winbond logic dept.) ARM9 processor,
  592. At present, the w90x900 has been renamed nuc900, regarding
  593. the ARM series product line, you can login the following
  594. link address to know more.
  595. <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
  596. ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
  597. config ARCH_TEGRA
  598. bool "NVIDIA Tegra"
  599. select CLKDEV_LOOKUP
  600. select CLKSRC_MMIO
  601. select GENERIC_CLOCKEVENTS
  602. select GENERIC_GPIO
  603. select HAVE_CLK
  604. select HAVE_SMP
  605. select MIGHT_HAVE_CACHE_L2X0
  606. select NEED_MACH_IO_H if PCI
  607. select ARCH_HAS_CPUFREQ
  608. select USE_OF
  609. help
  610. This enables support for NVIDIA Tegra based systems (Tegra APX,
  611. Tegra 6xx and Tegra 2 series).
  612. config ARCH_PICOXCELL
  613. bool "Picochip picoXcell"
  614. select ARCH_REQUIRE_GPIOLIB
  615. select ARM_PATCH_PHYS_VIRT
  616. select ARM_VIC
  617. select CPU_V6K
  618. select DW_APB_TIMER
  619. select DW_APB_TIMER_OF
  620. select GENERIC_CLOCKEVENTS
  621. select GENERIC_GPIO
  622. select HAVE_TCM
  623. select NO_IOPORT
  624. select SPARSE_IRQ
  625. select USE_OF
  626. help
  627. This enables support for systems based on the Picochip picoXcell
  628. family of Femtocell devices. The picoxcell support requires device tree
  629. for all boards.
  630. config ARCH_PNX4008
  631. bool "Philips Nexperia PNX4008 Mobile"
  632. select CPU_ARM926T
  633. select CLKDEV_LOOKUP
  634. select ARCH_USES_GETTIMEOFFSET
  635. help
  636. This enables support for Philips PNX4008 mobile platform.
  637. config ARCH_PXA
  638. bool "PXA2xx/PXA3xx-based"
  639. depends on MMU
  640. select ARCH_MTD_XIP
  641. select ARCH_HAS_CPUFREQ
  642. select CLKDEV_LOOKUP
  643. select CLKSRC_MMIO
  644. select ARCH_REQUIRE_GPIOLIB
  645. select GENERIC_CLOCKEVENTS
  646. select GPIO_PXA
  647. select PLAT_PXA
  648. select SPARSE_IRQ
  649. select AUTO_ZRELADDR
  650. select MULTI_IRQ_HANDLER
  651. select ARM_CPU_SUSPEND if PM
  652. select HAVE_IDE
  653. help
  654. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  655. config ARCH_MSM
  656. bool "Qualcomm MSM"
  657. select HAVE_CLK
  658. select GENERIC_CLOCKEVENTS
  659. select ARCH_REQUIRE_GPIOLIB
  660. select CLKDEV_LOOKUP
  661. help
  662. Support for Qualcomm MSM/QSD based systems. This runs on the
  663. apps processor of the MSM/QSD and depends on a shared memory
  664. interface to the modem processor which runs the baseband
  665. stack and controls some vital subsystems
  666. (clock and power control, etc).
  667. config ARCH_SHMOBILE
  668. bool "Renesas SH-Mobile / R-Mobile"
  669. select HAVE_CLK
  670. select CLKDEV_LOOKUP
  671. select HAVE_MACH_CLKDEV
  672. select HAVE_SMP
  673. select GENERIC_CLOCKEVENTS
  674. select MIGHT_HAVE_CACHE_L2X0
  675. select NO_IOPORT
  676. select SPARSE_IRQ
  677. select MULTI_IRQ_HANDLER
  678. select PM_GENERIC_DOMAINS if PM
  679. select NEED_MACH_MEMORY_H
  680. help
  681. Support for Renesas's SH-Mobile and R-Mobile ARM platforms.
  682. config ARCH_RPC
  683. bool "RiscPC"
  684. select ARCH_ACORN
  685. select FIQ
  686. select ARCH_MAY_HAVE_PC_FDC
  687. select HAVE_PATA_PLATFORM
  688. select ISA_DMA_API
  689. select NO_IOPORT
  690. select ARCH_SPARSEMEM_ENABLE
  691. select ARCH_USES_GETTIMEOFFSET
  692. select HAVE_IDE
  693. select NEED_MACH_IO_H
  694. select NEED_MACH_MEMORY_H
  695. help
  696. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  697. CD-ROM interface, serial and parallel port, and the floppy drive.
  698. config ARCH_SA1100
  699. bool "SA1100-based"
  700. select CLKSRC_MMIO
  701. select CPU_SA1100
  702. select ISA
  703. select ARCH_SPARSEMEM_ENABLE
  704. select ARCH_MTD_XIP
  705. select ARCH_HAS_CPUFREQ
  706. select CPU_FREQ
  707. select GENERIC_CLOCKEVENTS
  708. select CLKDEV_LOOKUP
  709. select ARCH_REQUIRE_GPIOLIB
  710. select HAVE_IDE
  711. select NEED_MACH_MEMORY_H
  712. select SPARSE_IRQ
  713. help
  714. Support for StrongARM 11x0 based boards.
  715. config ARCH_S3C24XX
  716. bool "Samsung S3C24XX SoCs"
  717. select GENERIC_GPIO
  718. select ARCH_HAS_CPUFREQ
  719. select HAVE_CLK
  720. select CLKDEV_LOOKUP
  721. select ARCH_USES_GETTIMEOFFSET
  722. select HAVE_S3C2410_I2C if I2C
  723. select HAVE_S3C_RTC if RTC_CLASS
  724. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  725. select NEED_MACH_IO_H
  726. help
  727. Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443
  728. and S3C2450 SoCs based systems, such as the Simtec Electronics BAST
  729. (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or the
  730. Samsung SMDK2410 development board (and derivatives).
  731. config ARCH_S3C64XX
  732. bool "Samsung S3C64XX"
  733. select PLAT_SAMSUNG
  734. select CPU_V6
  735. select ARM_VIC
  736. select HAVE_CLK
  737. select HAVE_TCM
  738. select CLKDEV_LOOKUP
  739. select NO_IOPORT
  740. select ARCH_USES_GETTIMEOFFSET
  741. select ARCH_HAS_CPUFREQ
  742. select ARCH_REQUIRE_GPIOLIB
  743. select SAMSUNG_CLKSRC
  744. select SAMSUNG_IRQ_VIC_TIMER
  745. select S3C_GPIO_TRACK
  746. select S3C_DEV_NAND
  747. select USB_ARCH_HAS_OHCI
  748. select SAMSUNG_GPIOLIB_4BIT
  749. select HAVE_S3C2410_I2C if I2C
  750. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  751. help
  752. Samsung S3C64XX series based systems
  753. config ARCH_S5P64X0
  754. bool "Samsung S5P6440 S5P6450"
  755. select CPU_V6
  756. select GENERIC_GPIO
  757. select HAVE_CLK
  758. select CLKDEV_LOOKUP
  759. select CLKSRC_MMIO
  760. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  761. select GENERIC_CLOCKEVENTS
  762. select HAVE_S3C2410_I2C if I2C
  763. select HAVE_S3C_RTC if RTC_CLASS
  764. help
  765. Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
  766. SMDK6450.
  767. config ARCH_S5PC100
  768. bool "Samsung S5PC100"
  769. select GENERIC_GPIO
  770. select HAVE_CLK
  771. select CLKDEV_LOOKUP
  772. select CPU_V7
  773. select ARCH_USES_GETTIMEOFFSET
  774. select HAVE_S3C2410_I2C if I2C
  775. select HAVE_S3C_RTC if RTC_CLASS
  776. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  777. help
  778. Samsung S5PC100 series based systems
  779. config ARCH_S5PV210
  780. bool "Samsung S5PV210/S5PC110"
  781. select CPU_V7
  782. select ARCH_SPARSEMEM_ENABLE
  783. select ARCH_HAS_HOLES_MEMORYMODEL
  784. select GENERIC_GPIO
  785. select HAVE_CLK
  786. select CLKDEV_LOOKUP
  787. select CLKSRC_MMIO
  788. select ARCH_HAS_CPUFREQ
  789. select GENERIC_CLOCKEVENTS
  790. select HAVE_S3C2410_I2C if I2C
  791. select HAVE_S3C_RTC if RTC_CLASS
  792. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  793. select NEED_MACH_MEMORY_H
  794. help
  795. Samsung S5PV210/S5PC110 series based systems
  796. config ARCH_EXYNOS
  797. bool "SAMSUNG EXYNOS"
  798. select CPU_V7
  799. select ARCH_SPARSEMEM_ENABLE
  800. select ARCH_HAS_HOLES_MEMORYMODEL
  801. select GENERIC_GPIO
  802. select HAVE_CLK
  803. select CLKDEV_LOOKUP
  804. select ARCH_HAS_CPUFREQ
  805. select GENERIC_CLOCKEVENTS
  806. select HAVE_S3C_RTC if RTC_CLASS
  807. select HAVE_S3C2410_I2C if I2C
  808. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  809. select NEED_MACH_MEMORY_H
  810. help
  811. Support for SAMSUNG's EXYNOS SoCs (EXYNOS4/5)
  812. config ARCH_SHARK
  813. bool "Shark"
  814. select CPU_SA110
  815. select ISA
  816. select ISA_DMA
  817. select ZONE_DMA
  818. select PCI
  819. select ARCH_USES_GETTIMEOFFSET
  820. select NEED_MACH_MEMORY_H
  821. select NEED_MACH_IO_H
  822. help
  823. Support for the StrongARM based Digital DNARD machine, also known
  824. as "Shark" (<http://www.shark-linux.de/shark.html>).
  825. config ARCH_U300
  826. bool "ST-Ericsson U300 Series"
  827. depends on MMU
  828. select CLKSRC_MMIO
  829. select CPU_ARM926T
  830. select HAVE_TCM
  831. select ARM_AMBA
  832. select ARM_PATCH_PHYS_VIRT
  833. select ARM_VIC
  834. select GENERIC_CLOCKEVENTS
  835. select CLKDEV_LOOKUP
  836. select COMMON_CLK
  837. select GENERIC_GPIO
  838. select ARCH_REQUIRE_GPIOLIB
  839. help
  840. Support for ST-Ericsson U300 series mobile platforms.
  841. config ARCH_U8500
  842. bool "ST-Ericsson U8500 Series"
  843. depends on MMU
  844. select CPU_V7
  845. select ARM_AMBA
  846. select GENERIC_CLOCKEVENTS
  847. select CLKDEV_LOOKUP
  848. select ARCH_REQUIRE_GPIOLIB
  849. select ARCH_HAS_CPUFREQ
  850. select HAVE_SMP
  851. select MIGHT_HAVE_CACHE_L2X0
  852. help
  853. Support for ST-Ericsson's Ux500 architecture
  854. config ARCH_NOMADIK
  855. bool "STMicroelectronics Nomadik"
  856. select ARM_AMBA
  857. select ARM_VIC
  858. select CPU_ARM926T
  859. select COMMON_CLK
  860. select GENERIC_CLOCKEVENTS
  861. select PINCTRL
  862. select MIGHT_HAVE_CACHE_L2X0
  863. select ARCH_REQUIRE_GPIOLIB
  864. help
  865. Support for the Nomadik platform by ST-Ericsson
  866. config ARCH_DAVINCI
  867. bool "TI DaVinci"
  868. select GENERIC_CLOCKEVENTS
  869. select ARCH_REQUIRE_GPIOLIB
  870. select ZONE_DMA
  871. select HAVE_IDE
  872. select CLKDEV_LOOKUP
  873. select GENERIC_ALLOCATOR
  874. select GENERIC_IRQ_CHIP
  875. select ARCH_HAS_HOLES_MEMORYMODEL
  876. help
  877. Support for TI's DaVinci platform.
  878. config ARCH_OMAP
  879. bool "TI OMAP"
  880. depends on MMU
  881. select HAVE_CLK
  882. select ARCH_REQUIRE_GPIOLIB
  883. select ARCH_HAS_CPUFREQ
  884. select CLKSRC_MMIO
  885. select GENERIC_CLOCKEVENTS
  886. select ARCH_HAS_HOLES_MEMORYMODEL
  887. help
  888. Support for TI's OMAP platform (OMAP1/2/3/4).
  889. config PLAT_SPEAR
  890. bool "ST SPEAr"
  891. select ARM_AMBA
  892. select ARCH_REQUIRE_GPIOLIB
  893. select CLKDEV_LOOKUP
  894. select COMMON_CLK
  895. select CLKSRC_MMIO
  896. select GENERIC_CLOCKEVENTS
  897. select HAVE_CLK
  898. help
  899. Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
  900. config ARCH_VT8500
  901. bool "VIA/WonderMedia 85xx"
  902. select CPU_ARM926T
  903. select GENERIC_GPIO
  904. select ARCH_HAS_CPUFREQ
  905. select GENERIC_CLOCKEVENTS
  906. select ARCH_REQUIRE_GPIOLIB
  907. help
  908. Support for VIA/WonderMedia VT8500/WM85xx System-on-Chip.
  909. config ARCH_ZYNQ
  910. bool "Xilinx Zynq ARM Cortex A9 Platform"
  911. select CPU_V7
  912. select GENERIC_CLOCKEVENTS
  913. select CLKDEV_LOOKUP
  914. select ARM_GIC
  915. select ARM_AMBA
  916. select ICST
  917. select MIGHT_HAVE_CACHE_L2X0
  918. select USE_OF
  919. help
  920. Support for Xilinx Zynq ARM Cortex A9 Platform
  921. endchoice
  922. #
  923. # This is sorted alphabetically by mach-* pathname. However, plat-*
  924. # Kconfigs may be included either alphabetically (according to the
  925. # plat- suffix) or along side the corresponding mach-* source.
  926. #
  927. source "arch/arm/mach-mvebu/Kconfig"
  928. source "arch/arm/mach-at91/Kconfig"
  929. source "arch/arm/mach-bcmring/Kconfig"
  930. source "arch/arm/mach-clps711x/Kconfig"
  931. source "arch/arm/mach-cns3xxx/Kconfig"
  932. source "arch/arm/mach-davinci/Kconfig"
  933. source "arch/arm/mach-dove/Kconfig"
  934. source "arch/arm/mach-ep93xx/Kconfig"
  935. source "arch/arm/mach-footbridge/Kconfig"
  936. source "arch/arm/mach-gemini/Kconfig"
  937. source "arch/arm/mach-h720x/Kconfig"
  938. source "arch/arm/mach-integrator/Kconfig"
  939. source "arch/arm/mach-iop32x/Kconfig"
  940. source "arch/arm/mach-iop33x/Kconfig"
  941. source "arch/arm/mach-iop13xx/Kconfig"
  942. source "arch/arm/mach-ixp4xx/Kconfig"
  943. source "arch/arm/mach-kirkwood/Kconfig"
  944. source "arch/arm/mach-ks8695/Kconfig"
  945. source "arch/arm/mach-msm/Kconfig"
  946. source "arch/arm/mach-mv78xx0/Kconfig"
  947. source "arch/arm/plat-mxc/Kconfig"
  948. source "arch/arm/mach-mxs/Kconfig"
  949. source "arch/arm/mach-netx/Kconfig"
  950. source "arch/arm/mach-nomadik/Kconfig"
  951. source "arch/arm/plat-nomadik/Kconfig"
  952. source "arch/arm/plat-omap/Kconfig"
  953. source "arch/arm/mach-omap1/Kconfig"
  954. source "arch/arm/mach-omap2/Kconfig"
  955. source "arch/arm/mach-orion5x/Kconfig"
  956. source "arch/arm/mach-pxa/Kconfig"
  957. source "arch/arm/plat-pxa/Kconfig"
  958. source "arch/arm/mach-mmp/Kconfig"
  959. source "arch/arm/mach-realview/Kconfig"
  960. source "arch/arm/mach-sa1100/Kconfig"
  961. source "arch/arm/plat-samsung/Kconfig"
  962. source "arch/arm/plat-s3c24xx/Kconfig"
  963. source "arch/arm/plat-spear/Kconfig"
  964. source "arch/arm/mach-s3c24xx/Kconfig"
  965. if ARCH_S3C24XX
  966. source "arch/arm/mach-s3c2412/Kconfig"
  967. source "arch/arm/mach-s3c2440/Kconfig"
  968. endif
  969. if ARCH_S3C64XX
  970. source "arch/arm/mach-s3c64xx/Kconfig"
  971. endif
  972. source "arch/arm/mach-s5p64x0/Kconfig"
  973. source "arch/arm/mach-s5pc100/Kconfig"
  974. source "arch/arm/mach-s5pv210/Kconfig"
  975. source "arch/arm/mach-exynos/Kconfig"
  976. source "arch/arm/mach-shmobile/Kconfig"
  977. source "arch/arm/mach-tegra/Kconfig"
  978. source "arch/arm/mach-u300/Kconfig"
  979. source "arch/arm/mach-ux500/Kconfig"
  980. source "arch/arm/mach-versatile/Kconfig"
  981. source "arch/arm/mach-vexpress/Kconfig"
  982. source "arch/arm/plat-versatile/Kconfig"
  983. source "arch/arm/mach-vt8500/Kconfig"
  984. source "arch/arm/mach-w90x900/Kconfig"
  985. # Definitions to make life easier
  986. config ARCH_ACORN
  987. bool
  988. config PLAT_IOP
  989. bool
  990. select GENERIC_CLOCKEVENTS
  991. config PLAT_ORION
  992. bool
  993. select CLKSRC_MMIO
  994. select GENERIC_IRQ_CHIP
  995. select IRQ_DOMAIN
  996. select COMMON_CLK
  997. config PLAT_PXA
  998. bool
  999. config PLAT_VERSATILE
  1000. bool
  1001. config ARM_TIMER_SP804
  1002. bool
  1003. select CLKSRC_MMIO
  1004. select HAVE_SCHED_CLOCK
  1005. source arch/arm/mm/Kconfig
  1006. config ARM_NR_BANKS
  1007. int
  1008. default 16 if ARCH_EP93XX
  1009. default 8
  1010. config IWMMXT
  1011. bool "Enable iWMMXt support"
  1012. depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
  1013. default y if PXA27x || PXA3xx || PXA95x || ARCH_MMP
  1014. help
  1015. Enable support for iWMMXt context switching at run time if
  1016. running on a CPU that supports it.
  1017. config XSCALE_PMU
  1018. bool
  1019. depends on CPU_XSCALE
  1020. default y
  1021. config CPU_HAS_PMU
  1022. depends on (CPU_V6 || CPU_V6K || CPU_V7 || XSCALE_PMU) && \
  1023. (!ARCH_OMAP3 || OMAP3_EMU)
  1024. default y
  1025. bool
  1026. config MULTI_IRQ_HANDLER
  1027. bool
  1028. help
  1029. Allow each machine to specify it's own IRQ handler at run time.
  1030. if !MMU
  1031. source "arch/arm/Kconfig-nommu"
  1032. endif
  1033. config ARM_ERRATA_326103
  1034. bool "ARM errata: FSR write bit incorrect on a SWP to read-only memory"
  1035. depends on CPU_V6
  1036. help
  1037. Executing a SWP instruction to read-only memory does not set bit 11
  1038. of the FSR on the ARM 1136 prior to r1p0. This causes the kernel to
  1039. treat the access as a read, preventing a COW from occurring and
  1040. causing the faulting task to livelock.
  1041. config ARM_ERRATA_411920
  1042. bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
  1043. depends on CPU_V6 || CPU_V6K
  1044. help
  1045. Invalidation of the Instruction Cache operation can
  1046. fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
  1047. It does not affect the MPCore. This option enables the ARM Ltd.
  1048. recommended workaround.
  1049. config ARM_ERRATA_430973
  1050. bool "ARM errata: Stale prediction on replaced interworking branch"
  1051. depends on CPU_V7
  1052. help
  1053. This option enables the workaround for the 430973 Cortex-A8
  1054. (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
  1055. interworking branch is replaced with another code sequence at the
  1056. same virtual address, whether due to self-modifying code or virtual
  1057. to physical address re-mapping, Cortex-A8 does not recover from the
  1058. stale interworking branch prediction. This results in Cortex-A8
  1059. executing the new code sequence in the incorrect ARM or Thumb state.
  1060. The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
  1061. and also flushes the branch target cache at every context switch.
  1062. Note that setting specific bits in the ACTLR register may not be
  1063. available in non-secure mode.
  1064. config ARM_ERRATA_458693
  1065. bool "ARM errata: Processor deadlock when a false hazard is created"
  1066. depends on CPU_V7
  1067. help
  1068. This option enables the workaround for the 458693 Cortex-A8 (r2p0)
  1069. erratum. For very specific sequences of memory operations, it is
  1070. possible for a hazard condition intended for a cache line to instead
  1071. be incorrectly associated with a different cache line. This false
  1072. hazard might then cause a processor deadlock. The workaround enables
  1073. the L1 caching of the NEON accesses and disables the PLD instruction
  1074. in the ACTLR register. Note that setting specific bits in the ACTLR
  1075. register may not be available in non-secure mode.
  1076. config ARM_ERRATA_460075
  1077. bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
  1078. depends on CPU_V7
  1079. help
  1080. This option enables the workaround for the 460075 Cortex-A8 (r2p0)
  1081. erratum. Any asynchronous access to the L2 cache may encounter a
  1082. situation in which recent store transactions to the L2 cache are lost
  1083. and overwritten with stale memory contents from external memory. The
  1084. workaround disables the write-allocate mode for the L2 cache via the
  1085. ACTLR register. Note that setting specific bits in the ACTLR register
  1086. may not be available in non-secure mode.
  1087. config ARM_ERRATA_742230
  1088. bool "ARM errata: DMB operation may be faulty"
  1089. depends on CPU_V7 && SMP
  1090. help
  1091. This option enables the workaround for the 742230 Cortex-A9
  1092. (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
  1093. between two write operations may not ensure the correct visibility
  1094. ordering of the two writes. This workaround sets a specific bit in
  1095. the diagnostic register of the Cortex-A9 which causes the DMB
  1096. instruction to behave as a DSB, ensuring the correct behaviour of
  1097. the two writes.
  1098. config ARM_ERRATA_742231
  1099. bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
  1100. depends on CPU_V7 && SMP
  1101. help
  1102. This option enables the workaround for the 742231 Cortex-A9
  1103. (r2p0..r2p2) erratum. Under certain conditions, specific to the
  1104. Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
  1105. accessing some data located in the same cache line, may get corrupted
  1106. data due to bad handling of the address hazard when the line gets
  1107. replaced from one of the CPUs at the same time as another CPU is
  1108. accessing it. This workaround sets specific bits in the diagnostic
  1109. register of the Cortex-A9 which reduces the linefill issuing
  1110. capabilities of the processor.
  1111. config PL310_ERRATA_588369
  1112. bool "PL310 errata: Clean & Invalidate maintenance operations do not invalidate clean lines"
  1113. depends on CACHE_L2X0
  1114. help
  1115. The PL310 L2 cache controller implements three types of Clean &
  1116. Invalidate maintenance operations: by Physical Address
  1117. (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
  1118. They are architecturally defined to behave as the execution of a
  1119. clean operation followed immediately by an invalidate operation,
  1120. both performing to the same memory location. This functionality
  1121. is not correctly implemented in PL310 as clean lines are not
  1122. invalidated as a result of these operations.
  1123. config ARM_ERRATA_720789
  1124. bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
  1125. depends on CPU_V7
  1126. help
  1127. This option enables the workaround for the 720789 Cortex-A9 (prior to
  1128. r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
  1129. broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
  1130. As a consequence of this erratum, some TLB entries which should be
  1131. invalidated are not, resulting in an incoherency in the system page
  1132. tables. The workaround changes the TLB flushing routines to invalidate
  1133. entries regardless of the ASID.
  1134. config PL310_ERRATA_727915
  1135. bool "PL310 errata: Background Clean & Invalidate by Way operation can cause data corruption"
  1136. depends on CACHE_L2X0
  1137. help
  1138. PL310 implements the Clean & Invalidate by Way L2 cache maintenance
  1139. operation (offset 0x7FC). This operation runs in background so that
  1140. PL310 can handle normal accesses while it is in progress. Under very
  1141. rare circumstances, due to this erratum, write data can be lost when
  1142. PL310 treats a cacheable write transaction during a Clean &
  1143. Invalidate by Way operation.
  1144. config ARM_ERRATA_743622
  1145. bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
  1146. depends on CPU_V7
  1147. help
  1148. This option enables the workaround for the 743622 Cortex-A9
  1149. (r2p*) erratum. Under very rare conditions, a faulty
  1150. optimisation in the Cortex-A9 Store Buffer may lead to data
  1151. corruption. This workaround sets a specific bit in the diagnostic
  1152. register of the Cortex-A9 which disables the Store Buffer
  1153. optimisation, preventing the defect from occurring. This has no
  1154. visible impact on the overall performance or power consumption of the
  1155. processor.
  1156. config ARM_ERRATA_751472
  1157. bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
  1158. depends on CPU_V7
  1159. help
  1160. This option enables the workaround for the 751472 Cortex-A9 (prior
  1161. to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
  1162. completion of a following broadcasted operation if the second
  1163. operation is received by a CPU before the ICIALLUIS has completed,
  1164. potentially leading to corrupted entries in the cache or TLB.
  1165. config PL310_ERRATA_753970
  1166. bool "PL310 errata: cache sync operation may be faulty"
  1167. depends on CACHE_PL310
  1168. help
  1169. This option enables the workaround for the 753970 PL310 (r3p0) erratum.
  1170. Under some condition the effect of cache sync operation on
  1171. the store buffer still remains when the operation completes.
  1172. This means that the store buffer is always asked to drain and
  1173. this prevents it from merging any further writes. The workaround
  1174. is to replace the normal offset of cache sync operation (0x730)
  1175. by another offset targeting an unmapped PL310 register 0x740.
  1176. This has the same effect as the cache sync operation: store buffer
  1177. drain and waiting for all buffers empty.
  1178. config ARM_ERRATA_754322
  1179. bool "ARM errata: possible faulty MMU translations following an ASID switch"
  1180. depends on CPU_V7
  1181. help
  1182. This option enables the workaround for the 754322 Cortex-A9 (r2p*,
  1183. r3p*) erratum. A speculative memory access may cause a page table walk
  1184. which starts prior to an ASID switch but completes afterwards. This
  1185. can populate the micro-TLB with a stale entry which may be hit with
  1186. the new ASID. This workaround places two dsb instructions in the mm
  1187. switching code so that no page table walks can cross the ASID switch.
  1188. config ARM_ERRATA_754327
  1189. bool "ARM errata: no automatic Store Buffer drain"
  1190. depends on CPU_V7 && SMP
  1191. help
  1192. This option enables the workaround for the 754327 Cortex-A9 (prior to
  1193. r2p0) erratum. The Store Buffer does not have any automatic draining
  1194. mechanism and therefore a livelock may occur if an external agent
  1195. continuously polls a memory location waiting to observe an update.
  1196. This workaround defines cpu_relax() as smp_mb(), preventing correctly
  1197. written polling loops from denying visibility of updates to memory.
  1198. config ARM_ERRATA_364296
  1199. bool "ARM errata: Possible cache data corruption with hit-under-miss enabled"
  1200. depends on CPU_V6 && !SMP
  1201. help
  1202. This options enables the workaround for the 364296 ARM1136
  1203. r0p2 erratum (possible cache data corruption with
  1204. hit-under-miss enabled). It sets the undocumented bit 31 in
  1205. the auxiliary control register and the FI bit in the control
  1206. register, thus disabling hit-under-miss without putting the
  1207. processor into full low interrupt latency mode. ARM11MPCore
  1208. is not affected.
  1209. config ARM_ERRATA_764369
  1210. bool "ARM errata: Data cache line maintenance operation by MVA may not succeed"
  1211. depends on CPU_V7 && SMP
  1212. help
  1213. This option enables the workaround for erratum 764369
  1214. affecting Cortex-A9 MPCore with two or more processors (all
  1215. current revisions). Under certain timing circumstances, a data
  1216. cache line maintenance operation by MVA targeting an Inner
  1217. Shareable memory region may fail to proceed up to either the
  1218. Point of Coherency or to the Point of Unification of the
  1219. system. This workaround adds a DSB instruction before the
  1220. relevant cache maintenance functions and sets a specific bit
  1221. in the diagnostic control register of the SCU.
  1222. config PL310_ERRATA_769419
  1223. bool "PL310 errata: no automatic Store Buffer drain"
  1224. depends on CACHE_L2X0
  1225. help
  1226. On revisions of the PL310 prior to r3p2, the Store Buffer does
  1227. not automatically drain. This can cause normal, non-cacheable
  1228. writes to be retained when the memory system is idle, leading
  1229. to suboptimal I/O performance for drivers using coherent DMA.
  1230. This option adds a write barrier to the cpu_idle loop so that,
  1231. on systems with an outer cache, the store buffer is drained
  1232. explicitly.
  1233. endmenu
  1234. source "arch/arm/common/Kconfig"
  1235. menu "Bus support"
  1236. config ARM_AMBA
  1237. bool
  1238. config ISA
  1239. bool
  1240. help
  1241. Find out whether you have ISA slots on your motherboard. ISA is the
  1242. name of a bus system, i.e. the way the CPU talks to the other stuff
  1243. inside your box. Other bus systems are PCI, EISA, MicroChannel
  1244. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  1245. newer boards don't support it. If you have ISA, say Y, otherwise N.
  1246. # Select ISA DMA controller support
  1247. config ISA_DMA
  1248. bool
  1249. select ISA_DMA_API
  1250. # Select ISA DMA interface
  1251. config ISA_DMA_API
  1252. bool
  1253. config PCI
  1254. bool "PCI support" if MIGHT_HAVE_PCI
  1255. help
  1256. Find out whether you have a PCI motherboard. PCI is the name of a
  1257. bus system, i.e. the way the CPU talks to the other stuff inside
  1258. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  1259. VESA. If you have PCI, say Y, otherwise N.
  1260. config PCI_DOMAINS
  1261. bool
  1262. depends on PCI
  1263. config PCI_NANOENGINE
  1264. bool "BSE nanoEngine PCI support"
  1265. depends on SA1100_NANOENGINE
  1266. help
  1267. Enable PCI on the BSE nanoEngine board.
  1268. config PCI_SYSCALL
  1269. def_bool PCI
  1270. # Select the host bridge type
  1271. config PCI_HOST_VIA82C505
  1272. bool
  1273. depends on PCI && ARCH_SHARK
  1274. default y
  1275. config PCI_HOST_ITE8152
  1276. bool
  1277. depends on PCI && MACH_ARMCORE
  1278. default y
  1279. select DMABOUNCE
  1280. source "drivers/pci/Kconfig"
  1281. source "drivers/pcmcia/Kconfig"
  1282. endmenu
  1283. menu "Kernel Features"
  1284. config HAVE_SMP
  1285. bool
  1286. help
  1287. This option should be selected by machines which have an SMP-
  1288. capable CPU.
  1289. The only effect of this option is to make the SMP-related
  1290. options available to the user for configuration.
  1291. config SMP
  1292. bool "Symmetric Multi-Processing"
  1293. depends on CPU_V6K || CPU_V7
  1294. depends on GENERIC_CLOCKEVENTS
  1295. depends on HAVE_SMP
  1296. depends on MMU
  1297. select USE_GENERIC_SMP_HELPERS
  1298. select HAVE_ARM_SCU if !ARCH_MSM_SCORPIONMP
  1299. help
  1300. This enables support for systems with more than one CPU. If you have
  1301. a system with only one CPU, like most personal computers, say N. If
  1302. you have a system with more than one CPU, say Y.
  1303. If you say N here, the kernel will run on single and multiprocessor
  1304. machines, but will use only one CPU of a multiprocessor machine. If
  1305. you say Y here, the kernel will run on many, but not all, single
  1306. processor machines. On a single processor machine, the kernel will
  1307. run faster if you say N here.
  1308. See also <file:Documentation/x86/i386/IO-APIC.txt>,
  1309. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  1310. <http://tldp.org/HOWTO/SMP-HOWTO.html>.
  1311. If you don't know what to do here, say N.
  1312. config SMP_ON_UP
  1313. bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
  1314. depends on EXPERIMENTAL
  1315. depends on SMP && !XIP_KERNEL
  1316. default y
  1317. help
  1318. SMP kernels contain instructions which fail on non-SMP processors.
  1319. Enabling this option allows the kernel to modify itself to make
  1320. these instructions safe. Disabling it allows about 1K of space
  1321. savings.
  1322. If you don't know what to do here, say Y.
  1323. config ARM_CPU_TOPOLOGY
  1324. bool "Support cpu topology definition"
  1325. depends on SMP && CPU_V7
  1326. default y
  1327. help
  1328. Support ARM cpu topology definition. The MPIDR register defines
  1329. affinity between processors which is then used to describe the cpu
  1330. topology of an ARM System.
  1331. config SCHED_MC
  1332. bool "Multi-core scheduler support"
  1333. depends on ARM_CPU_TOPOLOGY
  1334. help
  1335. Multi-core scheduler support improves the CPU scheduler's decision
  1336. making when dealing with multi-core CPU chips at a cost of slightly
  1337. increased overhead in some places. If unsure say N here.
  1338. config SCHED_SMT
  1339. bool "SMT scheduler support"
  1340. depends on ARM_CPU_TOPOLOGY
  1341. help
  1342. Improves the CPU scheduler's decision making when dealing with
  1343. MultiThreading at a cost of slightly increased overhead in some
  1344. places. If unsure say N here.
  1345. config HAVE_ARM_SCU
  1346. bool
  1347. help
  1348. This option enables support for the ARM system coherency unit
  1349. config ARM_ARCH_TIMER
  1350. bool "Architected timer support"
  1351. depends on CPU_V7
  1352. help
  1353. This option enables support for the ARM architected timer
  1354. config HAVE_ARM_TWD
  1355. bool
  1356. depends on SMP
  1357. help
  1358. This options enables support for the ARM timer and watchdog unit
  1359. choice
  1360. prompt "Memory split"
  1361. default VMSPLIT_3G
  1362. help
  1363. Select the desired split between kernel and user memory.
  1364. If you are not absolutely sure what you are doing, leave this
  1365. option alone!
  1366. config VMSPLIT_3G
  1367. bool "3G/1G user/kernel split"
  1368. config VMSPLIT_2G
  1369. bool "2G/2G user/kernel split"
  1370. config VMSPLIT_1G
  1371. bool "1G/3G user/kernel split"
  1372. endchoice
  1373. config PAGE_OFFSET
  1374. hex
  1375. default 0x40000000 if VMSPLIT_1G
  1376. default 0x80000000 if VMSPLIT_2G
  1377. default 0xC0000000
  1378. config NR_CPUS
  1379. int "Maximum number of CPUs (2-32)"
  1380. range 2 32
  1381. depends on SMP
  1382. default "4"
  1383. config HOTPLUG_CPU
  1384. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  1385. depends on SMP && HOTPLUG && EXPERIMENTAL
  1386. help
  1387. Say Y here to experiment with turning CPUs off and on. CPUs
  1388. can be controlled through /sys/devices/system/cpu.
  1389. config LOCAL_TIMERS
  1390. bool "Use local timer interrupts"
  1391. depends on SMP
  1392. default y
  1393. select HAVE_ARM_TWD if (!ARCH_MSM_SCORPIONMP && !EXYNOS4_MCT)
  1394. help
  1395. Enable support for local timers on SMP platforms, rather then the
  1396. legacy IPI broadcast method. Local timers allows the system
  1397. accounting to be spread across the timer interval, preventing a
  1398. "thundering herd" at every timer tick.
  1399. config ARCH_NR_GPIO
  1400. int
  1401. default 1024 if ARCH_SHMOBILE || ARCH_TEGRA
  1402. default 355 if ARCH_U8500
  1403. default 264 if MACH_H4700
  1404. default 512 if SOC_OMAP5
  1405. default 0
  1406. help
  1407. Maximum number of GPIOs in the system.
  1408. If unsure, leave the default value.
  1409. source kernel/Kconfig.preempt
  1410. config HZ
  1411. int
  1412. default 200 if ARCH_EBSA110 || ARCH_S3C24XX || ARCH_S5P64X0 || \
  1413. ARCH_S5PV210 || ARCH_EXYNOS4
  1414. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  1415. default AT91_TIMER_HZ if ARCH_AT91
  1416. default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
  1417. default 100
  1418. config THUMB2_KERNEL
  1419. bool "Compile the kernel in Thumb-2 mode (EXPERIMENTAL)"
  1420. depends on CPU_V7 && !CPU_V6 && !CPU_V6K && EXPERIMENTAL
  1421. select AEABI
  1422. select ARM_ASM_UNIFIED
  1423. select ARM_UNWIND
  1424. help
  1425. By enabling this option, the kernel will be compiled in
  1426. Thumb-2 mode. A compiler/assembler that understand the unified
  1427. ARM-Thumb syntax is needed.
  1428. If unsure, say N.
  1429. config THUMB2_AVOID_R_ARM_THM_JUMP11
  1430. bool "Work around buggy Thumb-2 short branch relocations in gas"
  1431. depends on THUMB2_KERNEL && MODULES
  1432. default y
  1433. help
  1434. Various binutils versions can resolve Thumb-2 branches to
  1435. locally-defined, preemptible global symbols as short-range "b.n"
  1436. branch instructions.
  1437. This is a problem, because there's no guarantee the final
  1438. destination of the symbol, or any candidate locations for a
  1439. trampoline, are within range of the branch. For this reason, the
  1440. kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
  1441. relocation in modules at all, and it makes little sense to add
  1442. support.
  1443. The symptom is that the kernel fails with an "unsupported
  1444. relocation" error when loading some modules.
  1445. Until fixed tools are available, passing
  1446. -fno-optimize-sibling-calls to gcc should prevent gcc generating
  1447. code which hits this problem, at the cost of a bit of extra runtime
  1448. stack usage in some cases.
  1449. The problem is described in more detail at:
  1450. https://bugs.launchpad.net/binutils-linaro/+bug/725126
  1451. Only Thumb-2 kernels are affected.
  1452. Unless you are sure your tools don't have this problem, say Y.
  1453. config ARM_ASM_UNIFIED
  1454. bool
  1455. config AEABI
  1456. bool "Use the ARM EABI to compile the kernel"
  1457. help
  1458. This option allows for the kernel to be compiled using the latest
  1459. ARM ABI (aka EABI). This is only useful if you are using a user
  1460. space environment that is also compiled with EABI.
  1461. Since there are major incompatibilities between the legacy ABI and
  1462. EABI, especially with regard to structure member alignment, this
  1463. option also changes the kernel syscall calling convention to
  1464. disambiguate both ABIs and allow for backward compatibility support
  1465. (selected with CONFIG_OABI_COMPAT).
  1466. To use this you need GCC version 4.0.0 or later.
  1467. config OABI_COMPAT
  1468. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  1469. depends on AEABI && EXPERIMENTAL && !THUMB2_KERNEL
  1470. default y
  1471. help
  1472. This option preserves the old syscall interface along with the
  1473. new (ARM EABI) one. It also provides a compatibility layer to
  1474. intercept syscalls that have structure arguments which layout
  1475. in memory differs between the legacy ABI and the new ARM EABI
  1476. (only for non "thumb" binaries). This option adds a tiny
  1477. overhead to all syscalls and produces a slightly larger kernel.
  1478. If you know you'll be using only pure EABI user space then you
  1479. can say N here. If this option is not selected and you attempt
  1480. to execute a legacy ABI binary then the result will be
  1481. UNPREDICTABLE (in fact it can be predicted that it won't work
  1482. at all). If in doubt say Y.
  1483. config ARCH_HAS_HOLES_MEMORYMODEL
  1484. bool
  1485. config ARCH_SPARSEMEM_ENABLE
  1486. bool
  1487. config ARCH_SPARSEMEM_DEFAULT
  1488. def_bool ARCH_SPARSEMEM_ENABLE
  1489. config ARCH_SELECT_MEMORY_MODEL
  1490. def_bool ARCH_SPARSEMEM_ENABLE
  1491. config HAVE_ARCH_PFN_VALID
  1492. def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
  1493. config HIGHMEM
  1494. bool "High Memory Support"
  1495. depends on MMU
  1496. help
  1497. The address space of ARM processors is only 4 Gigabytes large
  1498. and it has to accommodate user address space, kernel address
  1499. space as well as some memory mapped IO. That means that, if you
  1500. have a large amount of physical memory and/or IO, not all of the
  1501. memory can be "permanently mapped" by the kernel. The physical
  1502. memory that is not permanently mapped is called "high memory".
  1503. Depending on the selected kernel/user memory split, minimum
  1504. vmalloc space and actual amount of RAM, you may not need this
  1505. option which should result in a slightly faster kernel.
  1506. If unsure, say n.
  1507. config HIGHPTE
  1508. bool "Allocate 2nd-level pagetables from highmem"
  1509. depends on HIGHMEM
  1510. config HW_PERF_EVENTS
  1511. bool "Enable hardware performance counter support for perf events"
  1512. depends on PERF_EVENTS && CPU_HAS_PMU
  1513. default y
  1514. help
  1515. Enable hardware performance counter support for perf events. If
  1516. disabled, perf events will use software events only.
  1517. source "mm/Kconfig"
  1518. config FORCE_MAX_ZONEORDER
  1519. int "Maximum zone order" if ARCH_SHMOBILE
  1520. range 11 64 if ARCH_SHMOBILE
  1521. default "9" if SA1111
  1522. default "11"
  1523. help
  1524. The kernel memory allocator divides physically contiguous memory
  1525. blocks into "zones", where each zone is a power of two number of
  1526. pages. This option selects the largest power of two that the kernel
  1527. keeps in the memory allocator. If you need to allocate very large
  1528. blocks of physically contiguous memory, then you may need to
  1529. increase this value.
  1530. This config option is actually maximum order plus one. For example,
  1531. a value of 11 means that the largest free memory block is 2^10 pages.
  1532. config LEDS
  1533. bool "Timer and CPU usage LEDs"
  1534. depends on ARCH_CDB89712 || ARCH_EBSA110 || \
  1535. ARCH_EBSA285 || ARCH_INTEGRATOR || \
  1536. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  1537. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  1538. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  1539. ARCH_AT91 || ARCH_DAVINCI || \
  1540. ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
  1541. help
  1542. If you say Y here, the LEDs on your machine will be used
  1543. to provide useful information about your current system status.
  1544. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  1545. be able to select which LEDs are active using the options below. If
  1546. you are compiling a kernel for the EBSA-110 or the LART however, the
  1547. red LED will simply flash regularly to indicate that the system is
  1548. still functional. It is safe to say Y here if you have a CATS
  1549. system, but the driver will do nothing.
  1550. config LEDS_TIMER
  1551. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  1552. OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1553. || MACH_OMAP_PERSEUS2
  1554. depends on LEDS
  1555. depends on !GENERIC_CLOCKEVENTS
  1556. default y if ARCH_EBSA110
  1557. help
  1558. If you say Y here, one of the system LEDs (the green one on the
  1559. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  1560. will flash regularly to indicate that the system is still
  1561. operational. This is mainly useful to kernel hackers who are
  1562. debugging unstable kernels.
  1563. The LART uses the same LED for both Timer LED and CPU usage LED
  1564. functions. You may choose to use both, but the Timer LED function
  1565. will overrule the CPU usage LED.
  1566. config LEDS_CPU
  1567. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  1568. !ARCH_OMAP) \
  1569. || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1570. || MACH_OMAP_PERSEUS2
  1571. depends on LEDS
  1572. help
  1573. If you say Y here, the red LED will be used to give a good real
  1574. time indication of CPU usage, by lighting whenever the idle task
  1575. is not currently executing.
  1576. The LART uses the same LED for both Timer LED and CPU usage LED
  1577. functions. You may choose to use both, but the Timer LED function
  1578. will overrule the CPU usage LED.
  1579. config ALIGNMENT_TRAP
  1580. bool
  1581. depends on CPU_CP15_MMU
  1582. default y if !ARCH_EBSA110
  1583. select HAVE_PROC_CPU if PROC_FS
  1584. help
  1585. ARM processors cannot fetch/store information which is not
  1586. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  1587. address divisible by 4. On 32-bit ARM processors, these non-aligned
  1588. fetch/store instructions will be emulated in software if you say
  1589. here, which has a severe performance impact. This is necessary for
  1590. correct operation of some network protocols. With an IP-only
  1591. configuration it is safe to say N, otherwise say Y.
  1592. config UACCESS_WITH_MEMCPY
  1593. bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
  1594. depends on MMU && EXPERIMENTAL
  1595. default y if CPU_FEROCEON
  1596. help
  1597. Implement faster copy_to_user and clear_user methods for CPU
  1598. cores where a 8-word STM instruction give significantly higher
  1599. memory write throughput than a sequence of individual 32bit stores.
  1600. A possible side effect is a slight increase in scheduling latency
  1601. between threads sharing the same address space if they invoke
  1602. such copy operations with large buffers.
  1603. However, if the CPU data cache is using a write-allocate mode,
  1604. this option is unlikely to provide any performance gain.
  1605. config SECCOMP
  1606. bool
  1607. prompt "Enable seccomp to safely compute untrusted bytecode"
  1608. ---help---
  1609. This kernel feature is useful for number crunching applications
  1610. that may need to compute untrusted bytecode during their
  1611. execution. By using pipes or other transports made available to
  1612. the process as file descriptors supporting the read/write
  1613. syscalls, it's possible to isolate those applications in
  1614. their own address space using seccomp. Once seccomp is
  1615. enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
  1616. and the task is only allowed to execute a few safe syscalls
  1617. defined by each seccomp mode.
  1618. config CC_STACKPROTECTOR
  1619. bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
  1620. depends on EXPERIMENTAL
  1621. help
  1622. This option turns on the -fstack-protector GCC feature. This
  1623. feature puts, at the beginning of functions, a canary value on
  1624. the stack just before the return address, and validates
  1625. the value just before actually returning. Stack based buffer
  1626. overflows (that need to overwrite this return address) now also
  1627. overwrite the canary, which gets detected and the attack is then
  1628. neutralized via a kernel panic.
  1629. This feature requires gcc version 4.2 or above.
  1630. config DEPRECATED_PARAM_STRUCT
  1631. bool "Provide old way to pass kernel parameters"
  1632. help
  1633. This was deprecated in 2001 and announced to live on for 5 years.
  1634. Some old boot loaders still use this way.
  1635. endmenu
  1636. menu "Boot options"
  1637. config USE_OF
  1638. bool "Flattened Device Tree support"
  1639. select OF
  1640. select OF_EARLY_FLATTREE
  1641. select IRQ_DOMAIN
  1642. help
  1643. Include support for flattened device tree machine descriptions.
  1644. # Compressed boot loader in ROM. Yes, we really want to ask about
  1645. # TEXT and BSS so we preserve their values in the config files.
  1646. config ZBOOT_ROM_TEXT
  1647. hex "Compressed ROM boot loader base address"
  1648. default "0"
  1649. help
  1650. The physical address at which the ROM-able zImage is to be
  1651. placed in the target. Platforms which normally make use of
  1652. ROM-able zImage formats normally set this to a suitable
  1653. value in their defconfig file.
  1654. If ZBOOT_ROM is not enabled, this has no effect.
  1655. config ZBOOT_ROM_BSS
  1656. hex "Compressed ROM boot loader BSS address"
  1657. default "0"
  1658. help
  1659. The base address of an area of read/write memory in the target
  1660. for the ROM-able zImage which must be available while the
  1661. decompressor is running. It must be large enough to hold the
  1662. entire decompressed kernel plus an additional 128 KiB.
  1663. Platforms which normally make use of ROM-able zImage formats
  1664. normally set this to a suitable value in their defconfig file.
  1665. If ZBOOT_ROM is not enabled, this has no effect.
  1666. config ZBOOT_ROM
  1667. bool "Compressed boot loader in ROM/flash"
  1668. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  1669. help
  1670. Say Y here if you intend to execute your compressed kernel image
  1671. (zImage) directly from ROM or flash. If unsure, say N.
  1672. choice
  1673. prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)"
  1674. depends on ZBOOT_ROM && ARCH_SH7372 && EXPERIMENTAL
  1675. default ZBOOT_ROM_NONE
  1676. help
  1677. Include experimental SD/MMC loading code in the ROM-able zImage.
  1678. With this enabled it is possible to write the ROM-able zImage
  1679. kernel image to an MMC or SD card and boot the kernel straight
  1680. from the reset vector. At reset the processor Mask ROM will load
  1681. the first part of the ROM-able zImage which in turn loads the
  1682. rest the kernel image to RAM.
  1683. config ZBOOT_ROM_NONE
  1684. bool "No SD/MMC loader in zImage (EXPERIMENTAL)"
  1685. help
  1686. Do not load image from SD or MMC
  1687. config ZBOOT_ROM_MMCIF
  1688. bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
  1689. help
  1690. Load image from MMCIF hardware block.
  1691. config ZBOOT_ROM_SH_MOBILE_SDHI
  1692. bool "Include SuperH Mobile SDHI loader in zImage (EXPERIMENTAL)"
  1693. help
  1694. Load image from SDHI hardware block
  1695. endchoice
  1696. config ARM_APPENDED_DTB
  1697. bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
  1698. depends on OF && !ZBOOT_ROM && EXPERIMENTAL
  1699. help
  1700. With this option, the boot code will look for a device tree binary
  1701. (DTB) appended to zImage
  1702. (e.g. cat zImage <filename>.dtb > zImage_w_dtb).
  1703. This is meant as a backward compatibility convenience for those
  1704. systems with a bootloader that can't be upgraded to accommodate
  1705. the documented boot protocol using a device tree.
  1706. Beware that there is very little in terms of protection against
  1707. this option being confused by leftover garbage in memory that might
  1708. look like a DTB header after a reboot if no actual DTB is appended
  1709. to zImage. Do not leave this option active in a production kernel
  1710. if you don't intend to always append a DTB. Proper passing of the
  1711. location into r2 of a bootloader provided DTB is always preferable
  1712. to this option.
  1713. config ARM_ATAG_DTB_COMPAT
  1714. bool "Supplement the appended DTB with traditional ATAG information"
  1715. depends on ARM_APPENDED_DTB
  1716. help
  1717. Some old bootloaders can't be updated to a DTB capable one, yet
  1718. they provide ATAGs with memory configuration, the ramdisk address,
  1719. the kernel cmdline string, etc. Such information is dynamically
  1720. provided by the bootloader and can't always be stored in a static
  1721. DTB. To allow a device tree enabled kernel to be used with such
  1722. bootloaders, this option allows zImage to extract the information
  1723. from the ATAG list and store it at run time into the appended DTB.
  1724. choice
  1725. prompt "Kernel command line type" if ARM_ATAG_DTB_COMPAT
  1726. default ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
  1727. config ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
  1728. bool "Use bootloader kernel arguments if available"
  1729. help
  1730. Uses the command-line options passed by the boot loader instead of
  1731. the device tree bootargs property. If the boot loader doesn't provide
  1732. any, the device tree bootargs property will be used.
  1733. config ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEND
  1734. bool "Extend with bootloader kernel arguments"
  1735. help
  1736. The command-line arguments provided by the boot loader will be
  1737. appended to the the device tree bootargs property.
  1738. endchoice
  1739. config CMDLINE
  1740. string "Default kernel command string"
  1741. default ""
  1742. help
  1743. On some architectures (EBSA110 and CATS), there is currently no way
  1744. for the boot loader to pass arguments to the kernel. For these
  1745. architectures, you should supply some command-line options at build
  1746. time by entering them here. As a minimum, you should specify the
  1747. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  1748. choice
  1749. prompt "Kernel command line type" if CMDLINE != ""
  1750. default CMDLINE_FROM_BOOTLOADER
  1751. config CMDLINE_FROM_BOOTLOADER
  1752. bool "Use bootloader kernel arguments if available"
  1753. help
  1754. Uses the command-line options passed by the boot loader. If
  1755. the boot loader doesn't provide any, the default kernel command
  1756. string provided in CMDLINE will be used.
  1757. config CMDLINE_EXTEND
  1758. bool "Extend bootloader kernel arguments"
  1759. help
  1760. The command-line arguments provided by the boot loader will be
  1761. appended to the default kernel command string.
  1762. config CMDLINE_FORCE
  1763. bool "Always use the default kernel command string"
  1764. help
  1765. Always use the default kernel command string, even if the boot
  1766. loader passes other arguments to the kernel.
  1767. This is useful if you cannot or don't want to change the
  1768. command-line options your boot loader passes to the kernel.
  1769. endchoice
  1770. config XIP_KERNEL
  1771. bool "Kernel Execute-In-Place from ROM"
  1772. depends on !ZBOOT_ROM && !ARM_LPAE
  1773. help
  1774. Execute-In-Place allows the kernel to run from non-volatile storage
  1775. directly addressable by the CPU, such as NOR flash. This saves RAM
  1776. space since the text section of the kernel is not loaded from flash
  1777. to RAM. Read-write sections, such as the data section and stack,
  1778. are still copied to RAM. The XIP kernel is not compressed since
  1779. it has to run directly from flash, so it will take more space to
  1780. store it. The flash address used to link the kernel object files,
  1781. and for storing it, is configuration dependent. Therefore, if you
  1782. say Y here, you must know the proper physical address where to
  1783. store the kernel image depending on your own flash memory usage.
  1784. Also note that the make target becomes "make xipImage" rather than
  1785. "make zImage" or "make Image". The final kernel binary to put in
  1786. ROM memory will be arch/arm/boot/xipImage.
  1787. If unsure, say N.
  1788. config XIP_PHYS_ADDR
  1789. hex "XIP Kernel Physical Location"
  1790. depends on XIP_KERNEL
  1791. default "0x00080000"
  1792. help
  1793. This is the physical address in your flash memory the kernel will
  1794. be linked for and stored to. This address is dependent on your
  1795. own flash usage.
  1796. config KEXEC
  1797. bool "Kexec system call (EXPERIMENTAL)"
  1798. depends on EXPERIMENTAL && (!SMP || HOTPLUG_CPU)
  1799. help
  1800. kexec is a system call that implements the ability to shutdown your
  1801. current kernel, and to start another kernel. It is like a reboot
  1802. but it is independent of the system firmware. And like a reboot
  1803. you can start any kernel with it, not just Linux.
  1804. It is an ongoing process to be certain the hardware in a machine
  1805. is properly shutdown, so do not be surprised if this code does not
  1806. initially work for you. It may help to enable device hotplugging
  1807. support.
  1808. config ATAGS_PROC
  1809. bool "Export atags in procfs"
  1810. depends on KEXEC
  1811. default y
  1812. help
  1813. Should the atags used to boot the kernel be exported in an "atags"
  1814. file in procfs. Useful with kexec.
  1815. config CRASH_DUMP
  1816. bool "Build kdump crash kernel (EXPERIMENTAL)"
  1817. depends on EXPERIMENTAL
  1818. help
  1819. Generate crash dump after being started by kexec. This should
  1820. be normally only set in special crash dump kernels which are
  1821. loaded in the main kernel with kexec-tools into a specially
  1822. reserved region and then later executed after a crash by
  1823. kdump/kexec. The crash dump kernel must be compiled to a
  1824. memory address not used by the main kernel
  1825. For more details see Documentation/kdump/kdump.txt
  1826. config AUTO_ZRELADDR
  1827. bool "Auto calculation of the decompressed kernel image address"
  1828. depends on !ZBOOT_ROM && !ARCH_U300
  1829. help
  1830. ZRELADDR is the physical address where the decompressed kernel
  1831. image will be placed. If AUTO_ZRELADDR is selected, the address
  1832. will be determined at run-time by masking the current IP with
  1833. 0xf8000000. This assumes the zImage being placed in the first 128MB
  1834. from start of memory.
  1835. endmenu
  1836. menu "CPU Power Management"
  1837. if ARCH_HAS_CPUFREQ
  1838. source "drivers/cpufreq/Kconfig"
  1839. config CPU_FREQ_IMX
  1840. tristate "CPUfreq driver for i.MX CPUs"
  1841. depends on ARCH_MXC && CPU_FREQ
  1842. help
  1843. This enables the CPUfreq driver for i.MX CPUs.
  1844. config CPU_FREQ_SA1100
  1845. bool
  1846. config CPU_FREQ_SA1110
  1847. bool
  1848. config CPU_FREQ_INTEGRATOR
  1849. tristate "CPUfreq driver for ARM Integrator CPUs"
  1850. depends on ARCH_INTEGRATOR && CPU_FREQ
  1851. default y
  1852. help
  1853. This enables the CPUfreq driver for ARM Integrator CPUs.
  1854. For details, take a look at <file:Documentation/cpu-freq>.
  1855. If in doubt, say Y.
  1856. config CPU_FREQ_PXA
  1857. bool
  1858. depends on CPU_FREQ && ARCH_PXA && PXA25x
  1859. default y
  1860. select CPU_FREQ_TABLE
  1861. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  1862. config CPU_FREQ_S3C
  1863. bool
  1864. help
  1865. Internal configuration node for common cpufreq on Samsung SoC
  1866. config CPU_FREQ_S3C24XX
  1867. bool "CPUfreq driver for Samsung S3C24XX series CPUs (EXPERIMENTAL)"
  1868. depends on ARCH_S3C24XX && CPU_FREQ && EXPERIMENTAL
  1869. select CPU_FREQ_S3C
  1870. help
  1871. This enables the CPUfreq driver for the Samsung S3C24XX family
  1872. of CPUs.
  1873. For details, take a look at <file:Documentation/cpu-freq>.
  1874. If in doubt, say N.
  1875. config CPU_FREQ_S3C24XX_PLL
  1876. bool "Support CPUfreq changing of PLL frequency (EXPERIMENTAL)"
  1877. depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
  1878. help
  1879. Compile in support for changing the PLL frequency from the
  1880. S3C24XX series CPUfreq driver. The PLL takes time to settle
  1881. after a frequency change, so by default it is not enabled.
  1882. This also means that the PLL tables for the selected CPU(s) will
  1883. be built which may increase the size of the kernel image.
  1884. config CPU_FREQ_S3C24XX_DEBUG
  1885. bool "Debug CPUfreq Samsung driver core"
  1886. depends on CPU_FREQ_S3C24XX
  1887. help
  1888. Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
  1889. config CPU_FREQ_S3C24XX_IODEBUG
  1890. bool "Debug CPUfreq Samsung driver IO timing"
  1891. depends on CPU_FREQ_S3C24XX
  1892. help
  1893. Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
  1894. config CPU_FREQ_S3C24XX_DEBUGFS
  1895. bool "Export debugfs for CPUFreq"
  1896. depends on CPU_FREQ_S3C24XX && DEBUG_FS
  1897. help
  1898. Export status information via debugfs.
  1899. endif
  1900. source "drivers/cpuidle/Kconfig"
  1901. endmenu
  1902. menu "Floating point emulation"
  1903. comment "At least one emulation must be selected"
  1904. config FPE_NWFPE
  1905. bool "NWFPE math emulation"
  1906. depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
  1907. ---help---
  1908. Say Y to include the NWFPE floating point emulator in the kernel.
  1909. This is necessary to run most binaries. Linux does not currently
  1910. support floating point hardware so you need to say Y here even if
  1911. your machine has an FPA or floating point co-processor podule.
  1912. You may say N here if you are going to load the Acorn FPEmulator
  1913. early in the bootup.
  1914. config FPE_NWFPE_XP
  1915. bool "Support extended precision"
  1916. depends on FPE_NWFPE
  1917. help
  1918. Say Y to include 80-bit support in the kernel floating-point
  1919. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  1920. Note that gcc does not generate 80-bit operations by default,
  1921. so in most cases this option only enlarges the size of the
  1922. floating point emulator without any good reason.
  1923. You almost surely want to say N here.
  1924. config FPE_FASTFPE
  1925. bool "FastFPE math emulation (EXPERIMENTAL)"
  1926. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  1927. ---help---
  1928. Say Y here to include the FAST floating point emulator in the kernel.
  1929. This is an experimental much faster emulator which now also has full
  1930. precision for the mantissa. It does not support any exceptions.
  1931. It is very simple, and approximately 3-6 times faster than NWFPE.
  1932. It should be sufficient for most programs. It may be not suitable
  1933. for scientific calculations, but you have to check this for yourself.
  1934. If you do not feel you need a faster FP emulation you should better
  1935. choose NWFPE.
  1936. config VFP
  1937. bool "VFP-format floating point maths"
  1938. depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  1939. help
  1940. Say Y to include VFP support code in the kernel. This is needed
  1941. if your hardware includes a VFP unit.
  1942. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  1943. release notes and additional status information.
  1944. Say N if your target does not have VFP hardware.
  1945. config VFPv3
  1946. bool
  1947. depends on VFP
  1948. default y if CPU_V7
  1949. config NEON
  1950. bool "Advanced SIMD (NEON) Extension support"
  1951. depends on VFPv3 && CPU_V7
  1952. help
  1953. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  1954. Extension.
  1955. endmenu
  1956. menu "Userspace binary formats"
  1957. source "fs/Kconfig.binfmt"
  1958. config ARTHUR
  1959. tristate "RISC OS personality"
  1960. depends on !AEABI
  1961. help
  1962. Say Y here to include the kernel code necessary if you want to run
  1963. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  1964. experimental; if this sounds frightening, say N and sleep in peace.
  1965. You can also say M here to compile this support as a module (which
  1966. will be called arthur).
  1967. endmenu
  1968. menu "Power management options"
  1969. source "kernel/power/Kconfig"
  1970. config ARCH_SUSPEND_POSSIBLE
  1971. depends on !ARCH_S5PC100 && !ARCH_TEGRA
  1972. depends on CPU_ARM920T || CPU_ARM926T || CPU_SA1100 || \
  1973. CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE || CPU_MOHAWK
  1974. def_bool y
  1975. config ARM_CPU_SUSPEND
  1976. def_bool PM_SLEEP
  1977. endmenu
  1978. source "net/Kconfig"
  1979. source "drivers/Kconfig"
  1980. source "fs/Kconfig"
  1981. source "arch/arm/Kconfig.debug"
  1982. source "security/Kconfig"
  1983. source "crypto/Kconfig"
  1984. source "lib/Kconfig"