Kconfig 65 KB

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  1. config ARM
  2. bool
  3. default y
  4. select ARCH_BINFMT_ELF_RANDOMIZE_PIE
  5. select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
  6. select ARCH_HAVE_CUSTOM_GPIO_H
  7. select ARCH_WANT_IPC_PARSE_VERSION
  8. select CPU_PM if (SUSPEND || CPU_IDLE)
  9. select DCACHE_WORD_ACCESS if (CPU_V6 || CPU_V6K || CPU_V7) && !CPU_BIG_ENDIAN
  10. select GENERIC_ATOMIC64 if (CPU_V6 || !CPU_32v6K || !AEABI)
  11. select GENERIC_CLOCKEVENTS_BROADCAST if SMP
  12. select GENERIC_IRQ_PROBE
  13. select GENERIC_IRQ_SHOW
  14. select GENERIC_KERNEL_THREAD
  15. select GENERIC_KERNEL_EXECVE
  16. select GENERIC_PCI_IOMAP
  17. select GENERIC_SMP_IDLE_THREAD
  18. select GENERIC_STRNCPY_FROM_USER
  19. select GENERIC_STRNLEN_USER
  20. select HARDIRQS_SW_RESEND
  21. select HAVE_AOUT
  22. select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL
  23. select HAVE_ARCH_KGDB
  24. select HAVE_ARCH_TRACEHOOK
  25. select HAVE_BPF_JIT
  26. select HAVE_C_RECORDMCOUNT
  27. select HAVE_DEBUG_KMEMLEAK
  28. select HAVE_DMA_API_DEBUG
  29. select HAVE_DMA_ATTRS
  30. select HAVE_DMA_CONTIGUOUS if MMU
  31. select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL)
  32. select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
  33. select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL)
  34. select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
  35. select HAVE_GENERIC_DMA_COHERENT
  36. select HAVE_GENERIC_HARDIRQS
  37. select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7))
  38. select HAVE_IDE if PCI || ISA || PCMCIA
  39. select HAVE_IRQ_WORK
  40. select HAVE_KERNEL_GZIP
  41. select HAVE_KERNEL_LZMA
  42. select HAVE_KERNEL_LZO
  43. select HAVE_KERNEL_XZ
  44. select HAVE_KPROBES if !XIP_KERNEL
  45. select HAVE_KRETPROBES if (HAVE_KPROBES)
  46. select HAVE_MEMBLOCK
  47. select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
  48. select HAVE_PERF_EVENTS
  49. select HAVE_REGS_AND_STACK_ACCESS_API
  50. select HAVE_SYSCALL_TRACEPOINTS
  51. select HAVE_UID16
  52. select KTIME_SCALAR
  53. select PERF_USE_VMALLOC
  54. select RTC_LIB
  55. select SYS_SUPPORTS_APM_EMULATION
  56. select HAVE_MOD_ARCH_SPECIFIC if ARM_UNWIND
  57. select MODULES_USE_ELF_REL
  58. help
  59. The ARM series is a line of low-power-consumption RISC chip designs
  60. licensed by ARM Ltd and targeted at embedded applications and
  61. handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
  62. manufactured, but legacy ARM-based PC hardware remains popular in
  63. Europe. There is an ARM Linux project with a web page at
  64. <http://www.arm.linux.org.uk/>.
  65. config ARM_HAS_SG_CHAIN
  66. bool
  67. config NEED_SG_DMA_LENGTH
  68. bool
  69. config ARM_DMA_USE_IOMMU
  70. bool
  71. select ARM_HAS_SG_CHAIN
  72. select NEED_SG_DMA_LENGTH
  73. config HAVE_PWM
  74. bool
  75. config MIGHT_HAVE_PCI
  76. bool
  77. config SYS_SUPPORTS_APM_EMULATION
  78. bool
  79. config GENERIC_GPIO
  80. bool
  81. config HAVE_TCM
  82. bool
  83. select GENERIC_ALLOCATOR
  84. config HAVE_PROC_CPU
  85. bool
  86. config NO_IOPORT
  87. bool
  88. config EISA
  89. bool
  90. ---help---
  91. The Extended Industry Standard Architecture (EISA) bus was
  92. developed as an open alternative to the IBM MicroChannel bus.
  93. The EISA bus provided some of the features of the IBM MicroChannel
  94. bus while maintaining backward compatibility with cards made for
  95. the older ISA bus. The EISA bus saw limited use between 1988 and
  96. 1995 when it was made obsolete by the PCI bus.
  97. Say Y here if you are building a kernel for an EISA-based machine.
  98. Otherwise, say N.
  99. config SBUS
  100. bool
  101. config STACKTRACE_SUPPORT
  102. bool
  103. default y
  104. config HAVE_LATENCYTOP_SUPPORT
  105. bool
  106. depends on !SMP
  107. default y
  108. config LOCKDEP_SUPPORT
  109. bool
  110. default y
  111. config TRACE_IRQFLAGS_SUPPORT
  112. bool
  113. default y
  114. config RWSEM_GENERIC_SPINLOCK
  115. bool
  116. default y
  117. config RWSEM_XCHGADD_ALGORITHM
  118. bool
  119. config ARCH_HAS_ILOG2_U32
  120. bool
  121. config ARCH_HAS_ILOG2_U64
  122. bool
  123. config ARCH_HAS_CPUFREQ
  124. bool
  125. help
  126. Internal node to signify that the ARCH has CPUFREQ support
  127. and that the relevant menu configurations are displayed for
  128. it.
  129. config GENERIC_HWEIGHT
  130. bool
  131. default y
  132. config GENERIC_CALIBRATE_DELAY
  133. bool
  134. default y
  135. config ARCH_MAY_HAVE_PC_FDC
  136. bool
  137. config ZONE_DMA
  138. bool
  139. config NEED_DMA_MAP_STATE
  140. def_bool y
  141. config ARCH_HAS_DMA_SET_COHERENT_MASK
  142. bool
  143. config GENERIC_ISA_DMA
  144. bool
  145. config FIQ
  146. bool
  147. config NEED_RET_TO_USER
  148. bool
  149. config ARCH_MTD_XIP
  150. bool
  151. config VECTORS_BASE
  152. hex
  153. default 0xffff0000 if MMU || CPU_HIGH_VECTOR
  154. default DRAM_BASE if REMAP_VECTORS_TO_RAM
  155. default 0x00000000
  156. help
  157. The base address of exception vectors.
  158. config ARM_PATCH_PHYS_VIRT
  159. bool "Patch physical to virtual translations at runtime" if EMBEDDED
  160. default y
  161. depends on !XIP_KERNEL && MMU
  162. depends on !ARCH_REALVIEW || !SPARSEMEM
  163. help
  164. Patch phys-to-virt and virt-to-phys translation functions at
  165. boot and module load time according to the position of the
  166. kernel in system memory.
  167. This can only be used with non-XIP MMU kernels where the base
  168. of physical memory is at a 16MB boundary.
  169. Only disable this option if you know that you do not require
  170. this feature (eg, building a kernel for a single machine) and
  171. you need to shrink the kernel to the minimal size.
  172. config NEED_MACH_GPIO_H
  173. bool
  174. help
  175. Select this when mach/gpio.h is required to provide special
  176. definitions for this platform. The need for mach/gpio.h should
  177. be avoided when possible.
  178. config NEED_MACH_IO_H
  179. bool
  180. help
  181. Select this when mach/io.h is required to provide special
  182. definitions for this platform. The need for mach/io.h should
  183. be avoided when possible.
  184. config NEED_MACH_MEMORY_H
  185. bool
  186. help
  187. Select this when mach/memory.h is required to provide special
  188. definitions for this platform. The need for mach/memory.h should
  189. be avoided when possible.
  190. config PHYS_OFFSET
  191. hex "Physical address of main memory" if MMU
  192. depends on !ARM_PATCH_PHYS_VIRT && !NEED_MACH_MEMORY_H
  193. default DRAM_BASE if !MMU
  194. help
  195. Please provide the physical address corresponding to the
  196. location of main memory in your system.
  197. config GENERIC_BUG
  198. def_bool y
  199. depends on BUG
  200. source "init/Kconfig"
  201. source "kernel/Kconfig.freezer"
  202. menu "System Type"
  203. config MMU
  204. bool "MMU-based Paged Memory Management Support"
  205. default y
  206. help
  207. Select if you want MMU-based virtualised addressing space
  208. support by paged memory management. If unsure, say 'Y'.
  209. #
  210. # The "ARM system type" choice list is ordered alphabetically by option
  211. # text. Please add new entries in the option alphabetic order.
  212. #
  213. choice
  214. prompt "ARM system type"
  215. default ARCH_MULTIPLATFORM
  216. config ARCH_MULTIPLATFORM
  217. bool "Allow multiple platforms to be selected"
  218. depends on MMU
  219. select ARM_PATCH_PHYS_VIRT
  220. select AUTO_ZRELADDR
  221. select COMMON_CLK
  222. select MULTI_IRQ_HANDLER
  223. select SPARSE_IRQ
  224. select USE_OF
  225. config ARCH_INTEGRATOR
  226. bool "ARM Ltd. Integrator family"
  227. select ARCH_HAS_CPUFREQ
  228. select ARM_AMBA
  229. select COMMON_CLK
  230. select COMMON_CLK_VERSATILE
  231. select GENERIC_CLOCKEVENTS
  232. select HAVE_TCM
  233. select ICST
  234. select MULTI_IRQ_HANDLER
  235. select NEED_MACH_MEMORY_H
  236. select PLAT_VERSATILE
  237. select PLAT_VERSATILE_FPGA_IRQ
  238. select SPARSE_IRQ
  239. help
  240. Support for ARM's Integrator platform.
  241. config ARCH_REALVIEW
  242. bool "ARM Ltd. RealView family"
  243. select ARCH_WANT_OPTIONAL_GPIOLIB
  244. select ARM_AMBA
  245. select ARM_TIMER_SP804
  246. select COMMON_CLK
  247. select COMMON_CLK_VERSATILE
  248. select GENERIC_CLOCKEVENTS
  249. select GPIO_PL061 if GPIOLIB
  250. select ICST
  251. select NEED_MACH_MEMORY_H
  252. select PLAT_VERSATILE
  253. select PLAT_VERSATILE_CLCD
  254. help
  255. This enables support for ARM Ltd RealView boards.
  256. config ARCH_VERSATILE
  257. bool "ARM Ltd. Versatile family"
  258. select ARCH_WANT_OPTIONAL_GPIOLIB
  259. select ARM_AMBA
  260. select ARM_TIMER_SP804
  261. select ARM_VIC
  262. select CLKDEV_LOOKUP
  263. select GENERIC_CLOCKEVENTS
  264. select HAVE_MACH_CLKDEV
  265. select ICST
  266. select PLAT_VERSATILE
  267. select PLAT_VERSATILE_CLCD
  268. select PLAT_VERSATILE_CLOCK
  269. select PLAT_VERSATILE_FPGA_IRQ
  270. help
  271. This enables support for ARM Ltd Versatile board.
  272. config ARCH_AT91
  273. bool "Atmel AT91"
  274. select ARCH_REQUIRE_GPIOLIB
  275. select CLKDEV_LOOKUP
  276. select HAVE_CLK
  277. select IRQ_DOMAIN
  278. select NEED_MACH_GPIO_H
  279. select NEED_MACH_IO_H if PCCARD
  280. select PINCTRL
  281. select PINCTRL_AT91 if USE_OF
  282. help
  283. This enables support for systems based on Atmel
  284. AT91RM9200 and AT91SAM9* processors.
  285. config ARCH_BCM2835
  286. bool "Broadcom BCM2835 family"
  287. select ARCH_WANT_OPTIONAL_GPIOLIB
  288. select ARM_AMBA
  289. select ARM_ERRATA_411920
  290. select ARM_TIMER_SP804
  291. select CLKDEV_LOOKUP
  292. select COMMON_CLK
  293. select CPU_V6
  294. select GENERIC_CLOCKEVENTS
  295. select MULTI_IRQ_HANDLER
  296. select SPARSE_IRQ
  297. select USE_OF
  298. help
  299. This enables support for the Broadcom BCM2835 SoC. This SoC is
  300. use in the Raspberry Pi, and Roku 2 devices.
  301. config ARCH_CNS3XXX
  302. bool "Cavium Networks CNS3XXX family"
  303. select ARM_GIC
  304. select CPU_V6K
  305. select GENERIC_CLOCKEVENTS
  306. select MIGHT_HAVE_CACHE_L2X0
  307. select MIGHT_HAVE_PCI
  308. select PCI_DOMAINS if PCI
  309. help
  310. Support for Cavium Networks CNS3XXX platform.
  311. config ARCH_CLPS711X
  312. bool "Cirrus Logic CLPS711x/EP721x/EP731x-based"
  313. select ARCH_REQUIRE_GPIOLIB
  314. select ARCH_USES_GETTIMEOFFSET
  315. select CLKDEV_LOOKUP
  316. select COMMON_CLK
  317. select CPU_ARM720T
  318. select NEED_MACH_MEMORY_H
  319. help
  320. Support for Cirrus Logic 711x/721x/731x based boards.
  321. config ARCH_GEMINI
  322. bool "Cortina Systems Gemini"
  323. select ARCH_REQUIRE_GPIOLIB
  324. select ARCH_USES_GETTIMEOFFSET
  325. select CPU_FA526
  326. help
  327. Support for the Cortina Systems Gemini family SoCs
  328. config ARCH_SIRF
  329. bool "CSR SiRF"
  330. select ARCH_REQUIRE_GPIOLIB
  331. select COMMON_CLK
  332. select GENERIC_CLOCKEVENTS
  333. select GENERIC_IRQ_CHIP
  334. select MIGHT_HAVE_CACHE_L2X0
  335. select NO_IOPORT
  336. select PINCTRL
  337. select PINCTRL_SIRF
  338. select USE_OF
  339. help
  340. Support for CSR SiRFprimaII/Marco/Polo platforms
  341. config ARCH_EBSA110
  342. bool "EBSA-110"
  343. select ARCH_USES_GETTIMEOFFSET
  344. select CPU_SA110
  345. select ISA
  346. select NEED_MACH_IO_H
  347. select NEED_MACH_MEMORY_H
  348. select NO_IOPORT
  349. help
  350. This is an evaluation board for the StrongARM processor available
  351. from Digital. It has limited hardware on-board, including an
  352. Ethernet interface, two PCMCIA sockets, two serial ports and a
  353. parallel port.
  354. config ARCH_EP93XX
  355. bool "EP93xx-based"
  356. select ARCH_HAS_HOLES_MEMORYMODEL
  357. select ARCH_REQUIRE_GPIOLIB
  358. select ARCH_USES_GETTIMEOFFSET
  359. select ARM_AMBA
  360. select ARM_VIC
  361. select CLKDEV_LOOKUP
  362. select CPU_ARM920T
  363. select NEED_MACH_MEMORY_H
  364. help
  365. This enables support for the Cirrus EP93xx series of CPUs.
  366. config ARCH_FOOTBRIDGE
  367. bool "FootBridge"
  368. select CPU_SA110
  369. select FOOTBRIDGE
  370. select GENERIC_CLOCKEVENTS
  371. select HAVE_IDE
  372. select NEED_MACH_IO_H if !MMU
  373. select NEED_MACH_MEMORY_H
  374. help
  375. Support for systems based on the DC21285 companion chip
  376. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  377. config ARCH_MXC
  378. bool "Freescale MXC/iMX-based"
  379. select ARCH_REQUIRE_GPIOLIB
  380. select CLKDEV_LOOKUP
  381. select CLKSRC_MMIO
  382. select GENERIC_CLOCKEVENTS
  383. select GENERIC_IRQ_CHIP
  384. select MULTI_IRQ_HANDLER
  385. select SPARSE_IRQ
  386. select USE_OF
  387. help
  388. Support for Freescale MXC/iMX-based family of processors
  389. config ARCH_MXS
  390. bool "Freescale MXS-based"
  391. select ARCH_REQUIRE_GPIOLIB
  392. select CLKDEV_LOOKUP
  393. select CLKSRC_MMIO
  394. select COMMON_CLK
  395. select GENERIC_CLOCKEVENTS
  396. select HAVE_CLK_PREPARE
  397. select MULTI_IRQ_HANDLER
  398. select PINCTRL
  399. select SPARSE_IRQ
  400. select USE_OF
  401. help
  402. Support for Freescale MXS-based family of processors
  403. config ARCH_NETX
  404. bool "Hilscher NetX based"
  405. select ARM_VIC
  406. select CLKSRC_MMIO
  407. select CPU_ARM926T
  408. select GENERIC_CLOCKEVENTS
  409. help
  410. This enables support for systems based on the Hilscher NetX Soc
  411. config ARCH_H720X
  412. bool "Hynix HMS720x-based"
  413. select ARCH_USES_GETTIMEOFFSET
  414. select CPU_ARM720T
  415. select ISA_DMA_API
  416. help
  417. This enables support for systems based on the Hynix HMS720x
  418. config ARCH_IOP13XX
  419. bool "IOP13xx-based"
  420. depends on MMU
  421. select ARCH_SUPPORTS_MSI
  422. select CPU_XSC3
  423. select NEED_MACH_MEMORY_H
  424. select NEED_RET_TO_USER
  425. select PCI
  426. select PLAT_IOP
  427. select VMSPLIT_1G
  428. help
  429. Support for Intel's IOP13XX (XScale) family of processors.
  430. config ARCH_IOP32X
  431. bool "IOP32x-based"
  432. depends on MMU
  433. select ARCH_REQUIRE_GPIOLIB
  434. select CPU_XSCALE
  435. select NEED_MACH_GPIO_H
  436. select NEED_RET_TO_USER
  437. select PCI
  438. select PLAT_IOP
  439. help
  440. Support for Intel's 80219 and IOP32X (XScale) family of
  441. processors.
  442. config ARCH_IOP33X
  443. bool "IOP33x-based"
  444. depends on MMU
  445. select ARCH_REQUIRE_GPIOLIB
  446. select CPU_XSCALE
  447. select NEED_MACH_GPIO_H
  448. select NEED_RET_TO_USER
  449. select PCI
  450. select PLAT_IOP
  451. help
  452. Support for Intel's IOP33X (XScale) family of processors.
  453. config ARCH_IXP4XX
  454. bool "IXP4xx-based"
  455. depends on MMU
  456. select ARCH_HAS_DMA_SET_COHERENT_MASK
  457. select ARCH_REQUIRE_GPIOLIB
  458. select CLKSRC_MMIO
  459. select CPU_XSCALE
  460. select DMABOUNCE if PCI
  461. select GENERIC_CLOCKEVENTS
  462. select MIGHT_HAVE_PCI
  463. select NEED_MACH_IO_H
  464. help
  465. Support for Intel's IXP4XX (XScale) family of processors.
  466. config ARCH_DOVE
  467. bool "Marvell Dove"
  468. select ARCH_REQUIRE_GPIOLIB
  469. select CPU_V7
  470. select GENERIC_CLOCKEVENTS
  471. select MIGHT_HAVE_PCI
  472. select PLAT_ORION_LEGACY
  473. select USB_ARCH_HAS_EHCI
  474. help
  475. Support for the Marvell Dove SoC 88AP510
  476. config ARCH_KIRKWOOD
  477. bool "Marvell Kirkwood"
  478. select ARCH_REQUIRE_GPIOLIB
  479. select CPU_FEROCEON
  480. select GENERIC_CLOCKEVENTS
  481. select PCI
  482. select PCI_QUIRKS
  483. select PLAT_ORION_LEGACY
  484. help
  485. Support for the following Marvell Kirkwood series SoCs:
  486. 88F6180, 88F6192 and 88F6281.
  487. config ARCH_MV78XX0
  488. bool "Marvell MV78xx0"
  489. select ARCH_REQUIRE_GPIOLIB
  490. select CPU_FEROCEON
  491. select GENERIC_CLOCKEVENTS
  492. select PCI
  493. select PLAT_ORION_LEGACY
  494. help
  495. Support for the following Marvell MV78xx0 series SoCs:
  496. MV781x0, MV782x0.
  497. config ARCH_ORION5X
  498. bool "Marvell Orion"
  499. depends on MMU
  500. select ARCH_REQUIRE_GPIOLIB
  501. select CPU_FEROCEON
  502. select GENERIC_CLOCKEVENTS
  503. select PCI
  504. select PLAT_ORION_LEGACY
  505. help
  506. Support for the following Marvell Orion 5x series SoCs:
  507. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  508. Orion-2 (5281), Orion-1-90 (6183).
  509. config ARCH_MMP
  510. bool "Marvell PXA168/910/MMP2"
  511. depends on MMU
  512. select ARCH_REQUIRE_GPIOLIB
  513. select CLKDEV_LOOKUP
  514. select GENERIC_ALLOCATOR
  515. select GENERIC_CLOCKEVENTS
  516. select GPIO_PXA
  517. select IRQ_DOMAIN
  518. select NEED_MACH_GPIO_H
  519. select PINCTRL
  520. select PLAT_PXA
  521. select SPARSE_IRQ
  522. help
  523. Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
  524. config ARCH_KS8695
  525. bool "Micrel/Kendin KS8695"
  526. select ARCH_REQUIRE_GPIOLIB
  527. select CLKSRC_MMIO
  528. select CPU_ARM922T
  529. select GENERIC_CLOCKEVENTS
  530. select NEED_MACH_MEMORY_H
  531. help
  532. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  533. System-on-Chip devices.
  534. config ARCH_W90X900
  535. bool "Nuvoton W90X900 CPU"
  536. select ARCH_REQUIRE_GPIOLIB
  537. select CLKDEV_LOOKUP
  538. select CLKSRC_MMIO
  539. select CPU_ARM926T
  540. select GENERIC_CLOCKEVENTS
  541. help
  542. Support for Nuvoton (Winbond logic dept.) ARM9 processor,
  543. At present, the w90x900 has been renamed nuc900, regarding
  544. the ARM series product line, you can login the following
  545. link address to know more.
  546. <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
  547. ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
  548. config ARCH_LPC32XX
  549. bool "NXP LPC32XX"
  550. select ARCH_REQUIRE_GPIOLIB
  551. select ARM_AMBA
  552. select CLKDEV_LOOKUP
  553. select CLKSRC_MMIO
  554. select CPU_ARM926T
  555. select GENERIC_CLOCKEVENTS
  556. select HAVE_IDE
  557. select HAVE_PWM
  558. select USB_ARCH_HAS_OHCI
  559. select USE_OF
  560. help
  561. Support for the NXP LPC32XX family of processors
  562. config ARCH_TEGRA
  563. bool "NVIDIA Tegra"
  564. select ARCH_HAS_CPUFREQ
  565. select CLKDEV_LOOKUP
  566. select CLKSRC_MMIO
  567. select COMMON_CLK
  568. select GENERIC_CLOCKEVENTS
  569. select GENERIC_GPIO
  570. select HAVE_CLK
  571. select HAVE_SMP
  572. select MIGHT_HAVE_CACHE_L2X0
  573. select USE_OF
  574. help
  575. This enables support for NVIDIA Tegra based systems (Tegra APX,
  576. Tegra 6xx and Tegra 2 series).
  577. config ARCH_PXA
  578. bool "PXA2xx/PXA3xx-based"
  579. depends on MMU
  580. select ARCH_HAS_CPUFREQ
  581. select ARCH_MTD_XIP
  582. select ARCH_REQUIRE_GPIOLIB
  583. select ARM_CPU_SUSPEND if PM
  584. select AUTO_ZRELADDR
  585. select CLKDEV_LOOKUP
  586. select CLKSRC_MMIO
  587. select GENERIC_CLOCKEVENTS
  588. select GPIO_PXA
  589. select HAVE_IDE
  590. select MULTI_IRQ_HANDLER
  591. select NEED_MACH_GPIO_H
  592. select PLAT_PXA
  593. select SPARSE_IRQ
  594. help
  595. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  596. config ARCH_MSM
  597. bool "Qualcomm MSM"
  598. select ARCH_REQUIRE_GPIOLIB
  599. select CLKDEV_LOOKUP
  600. select GENERIC_CLOCKEVENTS
  601. select HAVE_CLK
  602. help
  603. Support for Qualcomm MSM/QSD based systems. This runs on the
  604. apps processor of the MSM/QSD and depends on a shared memory
  605. interface to the modem processor which runs the baseband
  606. stack and controls some vital subsystems
  607. (clock and power control, etc).
  608. config ARCH_SHMOBILE
  609. bool "Renesas SH-Mobile / R-Mobile"
  610. select CLKDEV_LOOKUP
  611. select GENERIC_CLOCKEVENTS
  612. select HAVE_CLK
  613. select HAVE_MACH_CLKDEV
  614. select HAVE_SMP
  615. select MIGHT_HAVE_CACHE_L2X0
  616. select MULTI_IRQ_HANDLER
  617. select NEED_MACH_MEMORY_H
  618. select NO_IOPORT
  619. select PM_GENERIC_DOMAINS if PM
  620. select SPARSE_IRQ
  621. help
  622. Support for Renesas's SH-Mobile and R-Mobile ARM platforms.
  623. config ARCH_RPC
  624. bool "RiscPC"
  625. select ARCH_ACORN
  626. select ARCH_MAY_HAVE_PC_FDC
  627. select ARCH_SPARSEMEM_ENABLE
  628. select ARCH_USES_GETTIMEOFFSET
  629. select FIQ
  630. select HAVE_IDE
  631. select HAVE_PATA_PLATFORM
  632. select ISA_DMA_API
  633. select NEED_MACH_IO_H
  634. select NEED_MACH_MEMORY_H
  635. select NO_IOPORT
  636. help
  637. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  638. CD-ROM interface, serial and parallel port, and the floppy drive.
  639. config ARCH_SA1100
  640. bool "SA1100-based"
  641. select ARCH_HAS_CPUFREQ
  642. select ARCH_MTD_XIP
  643. select ARCH_REQUIRE_GPIOLIB
  644. select ARCH_SPARSEMEM_ENABLE
  645. select CLKDEV_LOOKUP
  646. select CLKSRC_MMIO
  647. select CPU_FREQ
  648. select CPU_SA1100
  649. select GENERIC_CLOCKEVENTS
  650. select HAVE_IDE
  651. select ISA
  652. select NEED_MACH_GPIO_H
  653. select NEED_MACH_MEMORY_H
  654. select SPARSE_IRQ
  655. help
  656. Support for StrongARM 11x0 based boards.
  657. config ARCH_S3C24XX
  658. bool "Samsung S3C24XX SoCs"
  659. select ARCH_HAS_CPUFREQ
  660. select ARCH_USES_GETTIMEOFFSET
  661. select CLKDEV_LOOKUP
  662. select GENERIC_GPIO
  663. select HAVE_CLK
  664. select HAVE_S3C2410_I2C if I2C
  665. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  666. select HAVE_S3C_RTC if RTC_CLASS
  667. select NEED_MACH_GPIO_H
  668. select NEED_MACH_IO_H
  669. help
  670. Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443
  671. and S3C2450 SoCs based systems, such as the Simtec Electronics BAST
  672. (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or the
  673. Samsung SMDK2410 development board (and derivatives).
  674. config ARCH_S3C64XX
  675. bool "Samsung S3C64XX"
  676. select ARCH_HAS_CPUFREQ
  677. select ARCH_REQUIRE_GPIOLIB
  678. select ARCH_USES_GETTIMEOFFSET
  679. select ARM_VIC
  680. select CLKDEV_LOOKUP
  681. select CPU_V6
  682. select HAVE_CLK
  683. select HAVE_S3C2410_I2C if I2C
  684. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  685. select HAVE_TCM
  686. select NEED_MACH_GPIO_H
  687. select NO_IOPORT
  688. select PLAT_SAMSUNG
  689. select S3C_DEV_NAND
  690. select S3C_GPIO_TRACK
  691. select SAMSUNG_CLKSRC
  692. select SAMSUNG_GPIOLIB_4BIT
  693. select SAMSUNG_IRQ_VIC_TIMER
  694. select USB_ARCH_HAS_OHCI
  695. help
  696. Samsung S3C64XX series based systems
  697. config ARCH_S5P64X0
  698. bool "Samsung S5P6440 S5P6450"
  699. select CLKDEV_LOOKUP
  700. select CLKSRC_MMIO
  701. select CPU_V6
  702. select GENERIC_CLOCKEVENTS
  703. select GENERIC_GPIO
  704. select HAVE_CLK
  705. select HAVE_S3C2410_I2C if I2C
  706. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  707. select HAVE_S3C_RTC if RTC_CLASS
  708. select NEED_MACH_GPIO_H
  709. help
  710. Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
  711. SMDK6450.
  712. config ARCH_S5PC100
  713. bool "Samsung S5PC100"
  714. select ARCH_USES_GETTIMEOFFSET
  715. select CLKDEV_LOOKUP
  716. select CPU_V7
  717. select GENERIC_GPIO
  718. select HAVE_CLK
  719. select HAVE_S3C2410_I2C if I2C
  720. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  721. select HAVE_S3C_RTC if RTC_CLASS
  722. select NEED_MACH_GPIO_H
  723. help
  724. Samsung S5PC100 series based systems
  725. config ARCH_S5PV210
  726. bool "Samsung S5PV210/S5PC110"
  727. select ARCH_HAS_CPUFREQ
  728. select ARCH_HAS_HOLES_MEMORYMODEL
  729. select ARCH_SPARSEMEM_ENABLE
  730. select CLKDEV_LOOKUP
  731. select CLKSRC_MMIO
  732. select CPU_V7
  733. select GENERIC_CLOCKEVENTS
  734. select GENERIC_GPIO
  735. select HAVE_CLK
  736. select HAVE_S3C2410_I2C if I2C
  737. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  738. select HAVE_S3C_RTC if RTC_CLASS
  739. select NEED_MACH_GPIO_H
  740. select NEED_MACH_MEMORY_H
  741. help
  742. Samsung S5PV210/S5PC110 series based systems
  743. config ARCH_EXYNOS
  744. bool "Samsung EXYNOS"
  745. select ARCH_HAS_CPUFREQ
  746. select ARCH_HAS_HOLES_MEMORYMODEL
  747. select ARCH_SPARSEMEM_ENABLE
  748. select CLKDEV_LOOKUP
  749. select CPU_V7
  750. select GENERIC_CLOCKEVENTS
  751. select GENERIC_GPIO
  752. select HAVE_CLK
  753. select HAVE_S3C2410_I2C if I2C
  754. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  755. select HAVE_S3C_RTC if RTC_CLASS
  756. select NEED_MACH_GPIO_H
  757. select NEED_MACH_MEMORY_H
  758. help
  759. Support for SAMSUNG's EXYNOS SoCs (EXYNOS4/5)
  760. config ARCH_SHARK
  761. bool "Shark"
  762. select ARCH_USES_GETTIMEOFFSET
  763. select CPU_SA110
  764. select ISA
  765. select ISA_DMA
  766. select NEED_MACH_MEMORY_H
  767. select PCI
  768. select ZONE_DMA
  769. help
  770. Support for the StrongARM based Digital DNARD machine, also known
  771. as "Shark" (<http://www.shark-linux.de/shark.html>).
  772. config ARCH_U300
  773. bool "ST-Ericsson U300 Series"
  774. depends on MMU
  775. select ARCH_REQUIRE_GPIOLIB
  776. select ARM_AMBA
  777. select ARM_PATCH_PHYS_VIRT
  778. select ARM_VIC
  779. select CLKDEV_LOOKUP
  780. select CLKSRC_MMIO
  781. select COMMON_CLK
  782. select CPU_ARM926T
  783. select GENERIC_CLOCKEVENTS
  784. select GENERIC_GPIO
  785. select HAVE_TCM
  786. select SPARSE_IRQ
  787. help
  788. Support for ST-Ericsson U300 series mobile platforms.
  789. config ARCH_U8500
  790. bool "ST-Ericsson U8500 Series"
  791. depends on MMU
  792. select ARCH_HAS_CPUFREQ
  793. select ARCH_REQUIRE_GPIOLIB
  794. select ARM_AMBA
  795. select CLKDEV_LOOKUP
  796. select CPU_V7
  797. select GENERIC_CLOCKEVENTS
  798. select HAVE_SMP
  799. select MIGHT_HAVE_CACHE_L2X0
  800. help
  801. Support for ST-Ericsson's Ux500 architecture
  802. config ARCH_NOMADIK
  803. bool "STMicroelectronics Nomadik"
  804. select ARCH_REQUIRE_GPIOLIB
  805. select ARM_AMBA
  806. select ARM_VIC
  807. select COMMON_CLK
  808. select CPU_ARM926T
  809. select GENERIC_CLOCKEVENTS
  810. select MIGHT_HAVE_CACHE_L2X0
  811. select PINCTRL
  812. select PINCTRL_STN8815
  813. help
  814. Support for the Nomadik platform by ST-Ericsson
  815. config PLAT_SPEAR
  816. bool "ST SPEAr"
  817. select ARCH_HAS_CPUFREQ
  818. select ARCH_REQUIRE_GPIOLIB
  819. select ARM_AMBA
  820. select CLKDEV_LOOKUP
  821. select CLKSRC_MMIO
  822. select COMMON_CLK
  823. select GENERIC_CLOCKEVENTS
  824. select HAVE_CLK
  825. help
  826. Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
  827. config ARCH_DAVINCI
  828. bool "TI DaVinci"
  829. select ARCH_HAS_HOLES_MEMORYMODEL
  830. select ARCH_REQUIRE_GPIOLIB
  831. select CLKDEV_LOOKUP
  832. select GENERIC_ALLOCATOR
  833. select GENERIC_CLOCKEVENTS
  834. select GENERIC_IRQ_CHIP
  835. select HAVE_IDE
  836. select NEED_MACH_GPIO_H
  837. select ZONE_DMA
  838. help
  839. Support for TI's DaVinci platform.
  840. config ARCH_OMAP
  841. bool "TI OMAP"
  842. depends on MMU
  843. select ARCH_HAS_CPUFREQ
  844. select ARCH_HAS_HOLES_MEMORYMODEL
  845. select ARCH_REQUIRE_GPIOLIB
  846. select CLKSRC_MMIO
  847. select GENERIC_CLOCKEVENTS
  848. select HAVE_CLK
  849. select NEED_MACH_GPIO_H
  850. help
  851. Support for TI's OMAP platform (OMAP1/2/3/4).
  852. config ARCH_VT8500
  853. bool "VIA/WonderMedia 85xx"
  854. select ARCH_HAS_CPUFREQ
  855. select ARCH_REQUIRE_GPIOLIB
  856. select CLKDEV_LOOKUP
  857. select COMMON_CLK
  858. select CPU_ARM926T
  859. select GENERIC_CLOCKEVENTS
  860. select GENERIC_GPIO
  861. select HAVE_CLK
  862. select USE_OF
  863. help
  864. Support for VIA/WonderMedia VT8500/WM85xx System-on-Chip.
  865. config ARCH_ZYNQ
  866. bool "Xilinx Zynq ARM Cortex A9 Platform"
  867. select ARM_AMBA
  868. select ARM_GIC
  869. select CLKDEV_LOOKUP
  870. select CPU_V7
  871. select GENERIC_CLOCKEVENTS
  872. select ICST
  873. select MIGHT_HAVE_CACHE_L2X0
  874. select USE_OF
  875. help
  876. Support for Xilinx Zynq ARM Cortex A9 Platform
  877. endchoice
  878. menu "Multiple platform selection"
  879. depends on ARCH_MULTIPLATFORM
  880. comment "CPU Core family selection"
  881. config ARCH_MULTI_V4
  882. bool "ARMv4 based platforms (FA526, StrongARM)"
  883. depends on !ARCH_MULTI_V6_V7
  884. select ARCH_MULTI_V4_V5
  885. config ARCH_MULTI_V4T
  886. bool "ARMv4T based platforms (ARM720T, ARM920T, ...)"
  887. depends on !ARCH_MULTI_V6_V7
  888. select ARCH_MULTI_V4_V5
  889. config ARCH_MULTI_V5
  890. bool "ARMv5 based platforms (ARM926T, XSCALE, PJ1, ...)"
  891. depends on !ARCH_MULTI_V6_V7
  892. select ARCH_MULTI_V4_V5
  893. config ARCH_MULTI_V4_V5
  894. bool
  895. config ARCH_MULTI_V6
  896. bool "ARMv6 based platforms (ARM11, Scorpion, ...)"
  897. select ARCH_MULTI_V6_V7
  898. select CPU_V6
  899. config ARCH_MULTI_V7
  900. bool "ARMv7 based platforms (Cortex-A, PJ4, Krait)"
  901. default y
  902. select ARCH_MULTI_V6_V7
  903. select ARCH_VEXPRESS
  904. select CPU_V7
  905. config ARCH_MULTI_V6_V7
  906. bool
  907. config ARCH_MULTI_CPU_AUTO
  908. def_bool !(ARCH_MULTI_V4 || ARCH_MULTI_V4T || ARCH_MULTI_V6_V7)
  909. select ARCH_MULTI_V5
  910. endmenu
  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-clps711x/Kconfig"
  919. source "arch/arm/mach-cns3xxx/Kconfig"
  920. source "arch/arm/mach-davinci/Kconfig"
  921. source "arch/arm/mach-dove/Kconfig"
  922. source "arch/arm/mach-ep93xx/Kconfig"
  923. source "arch/arm/mach-footbridge/Kconfig"
  924. source "arch/arm/mach-gemini/Kconfig"
  925. source "arch/arm/mach-h720x/Kconfig"
  926. source "arch/arm/mach-highbank/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-msm/Kconfig"
  935. source "arch/arm/mach-mv78xx0/Kconfig"
  936. source "arch/arm/plat-mxc/Kconfig"
  937. source "arch/arm/mach-mxs/Kconfig"
  938. source "arch/arm/mach-netx/Kconfig"
  939. source "arch/arm/mach-nomadik/Kconfig"
  940. source "arch/arm/plat-nomadik/Kconfig"
  941. source "arch/arm/plat-omap/Kconfig"
  942. source "arch/arm/mach-omap1/Kconfig"
  943. source "arch/arm/mach-omap2/Kconfig"
  944. source "arch/arm/mach-orion5x/Kconfig"
  945. source "arch/arm/mach-picoxcell/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/mach-socfpga/Kconfig"
  954. source "arch/arm/plat-spear/Kconfig"
  955. source "arch/arm/mach-s3c24xx/Kconfig"
  956. if ARCH_S3C24XX
  957. source "arch/arm/mach-s3c2412/Kconfig"
  958. source "arch/arm/mach-s3c2440/Kconfig"
  959. endif
  960. if ARCH_S3C64XX
  961. source "arch/arm/mach-s3c64xx/Kconfig"
  962. endif
  963. source "arch/arm/mach-s5p64x0/Kconfig"
  964. source "arch/arm/mach-s5pc100/Kconfig"
  965. source "arch/arm/mach-s5pv210/Kconfig"
  966. source "arch/arm/mach-exynos/Kconfig"
  967. source "arch/arm/mach-shmobile/Kconfig"
  968. source "arch/arm/mach-prima2/Kconfig"
  969. source "arch/arm/mach-tegra/Kconfig"
  970. source "arch/arm/mach-u300/Kconfig"
  971. source "arch/arm/mach-ux500/Kconfig"
  972. source "arch/arm/mach-versatile/Kconfig"
  973. source "arch/arm/mach-vexpress/Kconfig"
  974. source "arch/arm/plat-versatile/Kconfig"
  975. source "arch/arm/mach-w90x900/Kconfig"
  976. # Definitions to make life easier
  977. config ARCH_ACORN
  978. bool
  979. config PLAT_IOP
  980. bool
  981. select GENERIC_CLOCKEVENTS
  982. config PLAT_ORION
  983. bool
  984. select CLKSRC_MMIO
  985. select COMMON_CLK
  986. select GENERIC_IRQ_CHIP
  987. select IRQ_DOMAIN
  988. config PLAT_ORION_LEGACY
  989. bool
  990. select PLAT_ORION
  991. config PLAT_PXA
  992. bool
  993. config PLAT_VERSATILE
  994. bool
  995. config ARM_TIMER_SP804
  996. bool
  997. select CLKSRC_MMIO
  998. select HAVE_SCHED_CLOCK
  999. source arch/arm/mm/Kconfig
  1000. config ARM_NR_BANKS
  1001. int
  1002. default 16 if ARCH_EP93XX
  1003. default 8
  1004. config IWMMXT
  1005. bool "Enable iWMMXt support"
  1006. depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
  1007. default y if PXA27x || PXA3xx || PXA95x || ARCH_MMP
  1008. help
  1009. Enable support for iWMMXt context switching at run time if
  1010. running on a CPU that supports it.
  1011. config XSCALE_PMU
  1012. bool
  1013. depends on CPU_XSCALE
  1014. default y
  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. config ARM_ERRATA_775420
  1223. bool "ARM errata: A data cache maintenance operation which aborts, might lead to deadlock"
  1224. depends on CPU_V7
  1225. help
  1226. This option enables the workaround for the 775420 Cortex-A9 (r2p2,
  1227. r2p6,r2p8,r2p10,r3p0) erratum. In case a date cache maintenance
  1228. operation aborts with MMU exception, it might cause the processor
  1229. to deadlock. This workaround puts DSB before executing ISB if
  1230. an abort may occur on cache maintenance.
  1231. endmenu
  1232. source "arch/arm/common/Kconfig"
  1233. menu "Bus support"
  1234. config ARM_AMBA
  1235. bool
  1236. config ISA
  1237. bool
  1238. help
  1239. Find out whether you have ISA slots on your motherboard. ISA is the
  1240. name of a bus system, i.e. the way the CPU talks to the other stuff
  1241. inside your box. Other bus systems are PCI, EISA, MicroChannel
  1242. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  1243. newer boards don't support it. If you have ISA, say Y, otherwise N.
  1244. # Select ISA DMA controller support
  1245. config ISA_DMA
  1246. bool
  1247. select ISA_DMA_API
  1248. # Select ISA DMA interface
  1249. config ISA_DMA_API
  1250. bool
  1251. config PCI
  1252. bool "PCI support" if MIGHT_HAVE_PCI
  1253. help
  1254. Find out whether you have a PCI motherboard. PCI is the name of a
  1255. bus system, i.e. the way the CPU talks to the other stuff inside
  1256. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  1257. VESA. If you have PCI, say Y, otherwise N.
  1258. config PCI_DOMAINS
  1259. bool
  1260. depends on PCI
  1261. config PCI_NANOENGINE
  1262. bool "BSE nanoEngine PCI support"
  1263. depends on SA1100_NANOENGINE
  1264. help
  1265. Enable PCI on the BSE nanoEngine board.
  1266. config PCI_SYSCALL
  1267. def_bool PCI
  1268. # Select the host bridge type
  1269. config PCI_HOST_VIA82C505
  1270. bool
  1271. depends on PCI && ARCH_SHARK
  1272. default y
  1273. config PCI_HOST_ITE8152
  1274. bool
  1275. depends on PCI && MACH_ARMCORE
  1276. default y
  1277. select DMABOUNCE
  1278. source "drivers/pci/Kconfig"
  1279. source "drivers/pcmcia/Kconfig"
  1280. endmenu
  1281. menu "Kernel Features"
  1282. config HAVE_SMP
  1283. bool
  1284. help
  1285. This option should be selected by machines which have an SMP-
  1286. capable CPU.
  1287. The only effect of this option is to make the SMP-related
  1288. options available to the user for configuration.
  1289. config SMP
  1290. bool "Symmetric Multi-Processing"
  1291. depends on CPU_V6K || CPU_V7
  1292. depends on GENERIC_CLOCKEVENTS
  1293. depends on HAVE_SMP
  1294. depends on MMU
  1295. select HAVE_ARM_SCU if !ARCH_MSM_SCORPIONMP
  1296. select USE_GENERIC_SMP_HELPERS
  1297. help
  1298. This enables support for systems with more than one CPU. If you have
  1299. a system with only one CPU, like most personal computers, say N. If
  1300. you have a system with more than one CPU, say Y.
  1301. If you say N here, the kernel will run on single and multiprocessor
  1302. machines, but will use only one CPU of a multiprocessor machine. If
  1303. you say Y here, the kernel will run on many, but not all, single
  1304. processor machines. On a single processor machine, the kernel will
  1305. run faster if you say N here.
  1306. See also <file:Documentation/x86/i386/IO-APIC.txt>,
  1307. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  1308. <http://tldp.org/HOWTO/SMP-HOWTO.html>.
  1309. If you don't know what to do here, say N.
  1310. config SMP_ON_UP
  1311. bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
  1312. depends on EXPERIMENTAL
  1313. depends on SMP && !XIP_KERNEL
  1314. default y
  1315. help
  1316. SMP kernels contain instructions which fail on non-SMP processors.
  1317. Enabling this option allows the kernel to modify itself to make
  1318. these instructions safe. Disabling it allows about 1K of space
  1319. savings.
  1320. If you don't know what to do here, say Y.
  1321. config ARM_CPU_TOPOLOGY
  1322. bool "Support cpu topology definition"
  1323. depends on SMP && CPU_V7
  1324. default y
  1325. help
  1326. Support ARM cpu topology definition. The MPIDR register defines
  1327. affinity between processors which is then used to describe the cpu
  1328. topology of an ARM System.
  1329. config SCHED_MC
  1330. bool "Multi-core scheduler support"
  1331. depends on ARM_CPU_TOPOLOGY
  1332. help
  1333. Multi-core scheduler support improves the CPU scheduler's decision
  1334. making when dealing with multi-core CPU chips at a cost of slightly
  1335. increased overhead in some places. If unsure say N here.
  1336. config SCHED_SMT
  1337. bool "SMT scheduler support"
  1338. depends on ARM_CPU_TOPOLOGY
  1339. help
  1340. Improves the CPU scheduler's decision making when dealing with
  1341. MultiThreading at a cost of slightly increased overhead in some
  1342. places. If unsure say N here.
  1343. config HAVE_ARM_SCU
  1344. bool
  1345. help
  1346. This option enables support for the ARM system coherency unit
  1347. config ARM_ARCH_TIMER
  1348. bool "Architected timer support"
  1349. depends on CPU_V7
  1350. help
  1351. This option enables support for the ARM architected timer
  1352. config HAVE_ARM_TWD
  1353. bool
  1354. depends on SMP
  1355. help
  1356. This options enables support for the ARM timer and watchdog unit
  1357. choice
  1358. prompt "Memory split"
  1359. default VMSPLIT_3G
  1360. help
  1361. Select the desired split between kernel and user memory.
  1362. If you are not absolutely sure what you are doing, leave this
  1363. option alone!
  1364. config VMSPLIT_3G
  1365. bool "3G/1G user/kernel split"
  1366. config VMSPLIT_2G
  1367. bool "2G/2G user/kernel split"
  1368. config VMSPLIT_1G
  1369. bool "1G/3G user/kernel split"
  1370. endchoice
  1371. config PAGE_OFFSET
  1372. hex
  1373. default 0x40000000 if VMSPLIT_1G
  1374. default 0x80000000 if VMSPLIT_2G
  1375. default 0xC0000000
  1376. config NR_CPUS
  1377. int "Maximum number of CPUs (2-32)"
  1378. range 2 32
  1379. depends on SMP
  1380. default "4"
  1381. config HOTPLUG_CPU
  1382. bool "Support for hot-pluggable CPUs"
  1383. depends on SMP && HOTPLUG
  1384. help
  1385. Say Y here to experiment with turning CPUs off and on. CPUs
  1386. can be controlled through /sys/devices/system/cpu.
  1387. config LOCAL_TIMERS
  1388. bool "Use local timer interrupts"
  1389. depends on SMP
  1390. default y
  1391. select HAVE_ARM_TWD if (!ARCH_MSM_SCORPIONMP && !EXYNOS4_MCT)
  1392. help
  1393. Enable support for local timers on SMP platforms, rather then the
  1394. legacy IPI broadcast method. Local timers allows the system
  1395. accounting to be spread across the timer interval, preventing a
  1396. "thundering herd" at every timer tick.
  1397. config ARCH_NR_GPIO
  1398. int
  1399. default 1024 if ARCH_SHMOBILE || ARCH_TEGRA
  1400. default 355 if ARCH_U8500
  1401. default 264 if MACH_H4700
  1402. default 512 if SOC_OMAP5
  1403. default 288 if ARCH_VT8500
  1404. default 0
  1405. help
  1406. Maximum number of GPIOs in the system.
  1407. If unsure, leave the default value.
  1408. source kernel/Kconfig.preempt
  1409. config HZ
  1410. int
  1411. default 200 if ARCH_EBSA110 || ARCH_S3C24XX || ARCH_S5P64X0 || \
  1412. ARCH_S5PV210 || ARCH_EXYNOS4
  1413. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  1414. default AT91_TIMER_HZ if ARCH_AT91
  1415. default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
  1416. default 100
  1417. config THUMB2_KERNEL
  1418. bool "Compile the kernel in Thumb-2 mode"
  1419. depends on CPU_V7 && !CPU_V6 && !CPU_V6K
  1420. select AEABI
  1421. select ARM_ASM_UNIFIED
  1422. select ARM_UNWIND
  1423. help
  1424. By enabling this option, the kernel will be compiled in
  1425. Thumb-2 mode. A compiler/assembler that understand the unified
  1426. ARM-Thumb syntax is needed.
  1427. If unsure, say N.
  1428. config THUMB2_AVOID_R_ARM_THM_JUMP11
  1429. bool "Work around buggy Thumb-2 short branch relocations in gas"
  1430. depends on THUMB2_KERNEL && MODULES
  1431. default y
  1432. help
  1433. Various binutils versions can resolve Thumb-2 branches to
  1434. locally-defined, preemptible global symbols as short-range "b.n"
  1435. branch instructions.
  1436. This is a problem, because there's no guarantee the final
  1437. destination of the symbol, or any candidate locations for a
  1438. trampoline, are within range of the branch. For this reason, the
  1439. kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
  1440. relocation in modules at all, and it makes little sense to add
  1441. support.
  1442. The symptom is that the kernel fails with an "unsupported
  1443. relocation" error when loading some modules.
  1444. Until fixed tools are available, passing
  1445. -fno-optimize-sibling-calls to gcc should prevent gcc generating
  1446. code which hits this problem, at the cost of a bit of extra runtime
  1447. stack usage in some cases.
  1448. The problem is described in more detail at:
  1449. https://bugs.launchpad.net/binutils-linaro/+bug/725126
  1450. Only Thumb-2 kernels are affected.
  1451. Unless you are sure your tools don't have this problem, say Y.
  1452. config ARM_ASM_UNIFIED
  1453. bool
  1454. config AEABI
  1455. bool "Use the ARM EABI to compile the kernel"
  1456. help
  1457. This option allows for the kernel to be compiled using the latest
  1458. ARM ABI (aka EABI). This is only useful if you are using a user
  1459. space environment that is also compiled with EABI.
  1460. Since there are major incompatibilities between the legacy ABI and
  1461. EABI, especially with regard to structure member alignment, this
  1462. option also changes the kernel syscall calling convention to
  1463. disambiguate both ABIs and allow for backward compatibility support
  1464. (selected with CONFIG_OABI_COMPAT).
  1465. To use this you need GCC version 4.0.0 or later.
  1466. config OABI_COMPAT
  1467. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  1468. depends on AEABI && EXPERIMENTAL && !THUMB2_KERNEL
  1469. default y
  1470. help
  1471. This option preserves the old syscall interface along with the
  1472. new (ARM EABI) one. It also provides a compatibility layer to
  1473. intercept syscalls that have structure arguments which layout
  1474. in memory differs between the legacy ABI and the new ARM EABI
  1475. (only for non "thumb" binaries). This option adds a tiny
  1476. overhead to all syscalls and produces a slightly larger kernel.
  1477. If you know you'll be using only pure EABI user space then you
  1478. can say N here. If this option is not selected and you attempt
  1479. to execute a legacy ABI binary then the result will be
  1480. UNPREDICTABLE (in fact it can be predicted that it won't work
  1481. at all). If in doubt say Y.
  1482. config ARCH_HAS_HOLES_MEMORYMODEL
  1483. bool
  1484. config ARCH_SPARSEMEM_ENABLE
  1485. bool
  1486. config ARCH_SPARSEMEM_DEFAULT
  1487. def_bool ARCH_SPARSEMEM_ENABLE
  1488. config ARCH_SELECT_MEMORY_MODEL
  1489. def_bool ARCH_SPARSEMEM_ENABLE
  1490. config HAVE_ARCH_PFN_VALID
  1491. def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
  1492. config HIGHMEM
  1493. bool "High Memory Support"
  1494. depends on MMU
  1495. help
  1496. The address space of ARM processors is only 4 Gigabytes large
  1497. and it has to accommodate user address space, kernel address
  1498. space as well as some memory mapped IO. That means that, if you
  1499. have a large amount of physical memory and/or IO, not all of the
  1500. memory can be "permanently mapped" by the kernel. The physical
  1501. memory that is not permanently mapped is called "high memory".
  1502. Depending on the selected kernel/user memory split, minimum
  1503. vmalloc space and actual amount of RAM, you may not need this
  1504. option which should result in a slightly faster kernel.
  1505. If unsure, say n.
  1506. config HIGHPTE
  1507. bool "Allocate 2nd-level pagetables from highmem"
  1508. depends on HIGHMEM
  1509. config HW_PERF_EVENTS
  1510. bool "Enable hardware performance counter support for perf events"
  1511. depends on PERF_EVENTS
  1512. default y
  1513. help
  1514. Enable hardware performance counter support for perf events. If
  1515. disabled, perf events will use software events only.
  1516. source "mm/Kconfig"
  1517. config FORCE_MAX_ZONEORDER
  1518. int "Maximum zone order" if ARCH_SHMOBILE
  1519. range 11 64 if ARCH_SHMOBILE
  1520. default "12" if SOC_AM33XX
  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 ALIGNMENT_TRAP
  1533. bool
  1534. depends on CPU_CP15_MMU
  1535. default y if !ARCH_EBSA110
  1536. select HAVE_PROC_CPU if PROC_FS
  1537. help
  1538. ARM processors cannot fetch/store information which is not
  1539. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  1540. address divisible by 4. On 32-bit ARM processors, these non-aligned
  1541. fetch/store instructions will be emulated in software if you say
  1542. here, which has a severe performance impact. This is necessary for
  1543. correct operation of some network protocols. With an IP-only
  1544. configuration it is safe to say N, otherwise say Y.
  1545. config UACCESS_WITH_MEMCPY
  1546. bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user()"
  1547. depends on MMU
  1548. default y if CPU_FEROCEON
  1549. help
  1550. Implement faster copy_to_user and clear_user methods for CPU
  1551. cores where a 8-word STM instruction give significantly higher
  1552. memory write throughput than a sequence of individual 32bit stores.
  1553. A possible side effect is a slight increase in scheduling latency
  1554. between threads sharing the same address space if they invoke
  1555. such copy operations with large buffers.
  1556. However, if the CPU data cache is using a write-allocate mode,
  1557. this option is unlikely to provide any performance gain.
  1558. config SECCOMP
  1559. bool
  1560. prompt "Enable seccomp to safely compute untrusted bytecode"
  1561. ---help---
  1562. This kernel feature is useful for number crunching applications
  1563. that may need to compute untrusted bytecode during their
  1564. execution. By using pipes or other transports made available to
  1565. the process as file descriptors supporting the read/write
  1566. syscalls, it's possible to isolate those applications in
  1567. their own address space using seccomp. Once seccomp is
  1568. enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
  1569. and the task is only allowed to execute a few safe syscalls
  1570. defined by each seccomp mode.
  1571. config CC_STACKPROTECTOR
  1572. bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
  1573. depends on EXPERIMENTAL
  1574. help
  1575. This option turns on the -fstack-protector GCC feature. This
  1576. feature puts, at the beginning of functions, a canary value on
  1577. the stack just before the return address, and validates
  1578. the value just before actually returning. Stack based buffer
  1579. overflows (that need to overwrite this return address) now also
  1580. overwrite the canary, which gets detected and the attack is then
  1581. neutralized via a kernel panic.
  1582. This feature requires gcc version 4.2 or above.
  1583. config XEN_DOM0
  1584. def_bool y
  1585. depends on XEN
  1586. config XEN
  1587. bool "Xen guest support on ARM (EXPERIMENTAL)"
  1588. depends on EXPERIMENTAL && ARM && OF
  1589. depends on CPU_V7 && !CPU_V6
  1590. help
  1591. Say Y if you want to run Linux in a Virtual Machine on Xen on ARM.
  1592. endmenu
  1593. menu "Boot options"
  1594. config USE_OF
  1595. bool "Flattened Device Tree support"
  1596. select IRQ_DOMAIN
  1597. select OF
  1598. select OF_EARLY_FLATTREE
  1599. help
  1600. Include support for flattened device tree machine descriptions.
  1601. config ATAGS
  1602. bool "Support for the traditional ATAGS boot data passing" if USE_OF
  1603. default y
  1604. help
  1605. This is the traditional way of passing data to the kernel at boot
  1606. time. If you are solely relying on the flattened device tree (or
  1607. the ARM_ATAG_DTB_COMPAT option) then you may unselect this option
  1608. to remove ATAGS support from your kernel binary. If unsure,
  1609. leave this to y.
  1610. config DEPRECATED_PARAM_STRUCT
  1611. bool "Provide old way to pass kernel parameters"
  1612. depends on ATAGS
  1613. help
  1614. This was deprecated in 2001 and announced to live on for 5 years.
  1615. Some old boot loaders still use this way.
  1616. # Compressed boot loader in ROM. Yes, we really want to ask about
  1617. # TEXT and BSS so we preserve their values in the config files.
  1618. config ZBOOT_ROM_TEXT
  1619. hex "Compressed ROM boot loader base address"
  1620. default "0"
  1621. help
  1622. The physical address at which the ROM-able zImage is to be
  1623. placed in the target. Platforms which normally make use of
  1624. ROM-able zImage formats normally set this to a suitable
  1625. value in their defconfig file.
  1626. If ZBOOT_ROM is not enabled, this has no effect.
  1627. config ZBOOT_ROM_BSS
  1628. hex "Compressed ROM boot loader BSS address"
  1629. default "0"
  1630. help
  1631. The base address of an area of read/write memory in the target
  1632. for the ROM-able zImage which must be available while the
  1633. decompressor is running. It must be large enough to hold the
  1634. entire decompressed kernel plus an additional 128 KiB.
  1635. Platforms which normally make use of ROM-able zImage formats
  1636. normally set this to a suitable value in their defconfig file.
  1637. If ZBOOT_ROM is not enabled, this has no effect.
  1638. config ZBOOT_ROM
  1639. bool "Compressed boot loader in ROM/flash"
  1640. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  1641. help
  1642. Say Y here if you intend to execute your compressed kernel image
  1643. (zImage) directly from ROM or flash. If unsure, say N.
  1644. choice
  1645. prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)"
  1646. depends on ZBOOT_ROM && ARCH_SH7372 && EXPERIMENTAL
  1647. default ZBOOT_ROM_NONE
  1648. help
  1649. Include experimental SD/MMC loading code in the ROM-able zImage.
  1650. With this enabled it is possible to write the ROM-able zImage
  1651. kernel image to an MMC or SD card and boot the kernel straight
  1652. from the reset vector. At reset the processor Mask ROM will load
  1653. the first part of the ROM-able zImage which in turn loads the
  1654. rest the kernel image to RAM.
  1655. config ZBOOT_ROM_NONE
  1656. bool "No SD/MMC loader in zImage (EXPERIMENTAL)"
  1657. help
  1658. Do not load image from SD or MMC
  1659. config ZBOOT_ROM_MMCIF
  1660. bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
  1661. help
  1662. Load image from MMCIF hardware block.
  1663. config ZBOOT_ROM_SH_MOBILE_SDHI
  1664. bool "Include SuperH Mobile SDHI loader in zImage (EXPERIMENTAL)"
  1665. help
  1666. Load image from SDHI hardware block
  1667. endchoice
  1668. config ARM_APPENDED_DTB
  1669. bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
  1670. depends on OF && !ZBOOT_ROM && EXPERIMENTAL
  1671. help
  1672. With this option, the boot code will look for a device tree binary
  1673. (DTB) appended to zImage
  1674. (e.g. cat zImage <filename>.dtb > zImage_w_dtb).
  1675. This is meant as a backward compatibility convenience for those
  1676. systems with a bootloader that can't be upgraded to accommodate
  1677. the documented boot protocol using a device tree.
  1678. Beware that there is very little in terms of protection against
  1679. this option being confused by leftover garbage in memory that might
  1680. look like a DTB header after a reboot if no actual DTB is appended
  1681. to zImage. Do not leave this option active in a production kernel
  1682. if you don't intend to always append a DTB. Proper passing of the
  1683. location into r2 of a bootloader provided DTB is always preferable
  1684. to this option.
  1685. config ARM_ATAG_DTB_COMPAT
  1686. bool "Supplement the appended DTB with traditional ATAG information"
  1687. depends on ARM_APPENDED_DTB
  1688. help
  1689. Some old bootloaders can't be updated to a DTB capable one, yet
  1690. they provide ATAGs with memory configuration, the ramdisk address,
  1691. the kernel cmdline string, etc. Such information is dynamically
  1692. provided by the bootloader and can't always be stored in a static
  1693. DTB. To allow a device tree enabled kernel to be used with such
  1694. bootloaders, this option allows zImage to extract the information
  1695. from the ATAG list and store it at run time into the appended DTB.
  1696. choice
  1697. prompt "Kernel command line type" if ARM_ATAG_DTB_COMPAT
  1698. default ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
  1699. config ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
  1700. bool "Use bootloader kernel arguments if available"
  1701. help
  1702. Uses the command-line options passed by the boot loader instead of
  1703. the device tree bootargs property. If the boot loader doesn't provide
  1704. any, the device tree bootargs property will be used.
  1705. config ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEND
  1706. bool "Extend with bootloader kernel arguments"
  1707. help
  1708. The command-line arguments provided by the boot loader will be
  1709. appended to the the device tree bootargs property.
  1710. endchoice
  1711. config CMDLINE
  1712. string "Default kernel command string"
  1713. default ""
  1714. help
  1715. On some architectures (EBSA110 and CATS), there is currently no way
  1716. for the boot loader to pass arguments to the kernel. For these
  1717. architectures, you should supply some command-line options at build
  1718. time by entering them here. As a minimum, you should specify the
  1719. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  1720. choice
  1721. prompt "Kernel command line type" if CMDLINE != ""
  1722. default CMDLINE_FROM_BOOTLOADER
  1723. depends on ATAGS
  1724. config CMDLINE_FROM_BOOTLOADER
  1725. bool "Use bootloader kernel arguments if available"
  1726. help
  1727. Uses the command-line options passed by the boot loader. If
  1728. the boot loader doesn't provide any, the default kernel command
  1729. string provided in CMDLINE will be used.
  1730. config CMDLINE_EXTEND
  1731. bool "Extend bootloader kernel arguments"
  1732. help
  1733. The command-line arguments provided by the boot loader will be
  1734. appended to the default kernel command string.
  1735. config CMDLINE_FORCE
  1736. bool "Always use the default kernel command string"
  1737. help
  1738. Always use the default kernel command string, even if the boot
  1739. loader passes other arguments to the kernel.
  1740. This is useful if you cannot or don't want to change the
  1741. command-line options your boot loader passes to the kernel.
  1742. endchoice
  1743. config XIP_KERNEL
  1744. bool "Kernel Execute-In-Place from ROM"
  1745. depends on !ZBOOT_ROM && !ARM_LPAE && !ARCH_MULTIPLATFORM
  1746. help
  1747. Execute-In-Place allows the kernel to run from non-volatile storage
  1748. directly addressable by the CPU, such as NOR flash. This saves RAM
  1749. space since the text section of the kernel is not loaded from flash
  1750. to RAM. Read-write sections, such as the data section and stack,
  1751. are still copied to RAM. The XIP kernel is not compressed since
  1752. it has to run directly from flash, so it will take more space to
  1753. store it. The flash address used to link the kernel object files,
  1754. and for storing it, is configuration dependent. Therefore, if you
  1755. say Y here, you must know the proper physical address where to
  1756. store the kernel image depending on your own flash memory usage.
  1757. Also note that the make target becomes "make xipImage" rather than
  1758. "make zImage" or "make Image". The final kernel binary to put in
  1759. ROM memory will be arch/arm/boot/xipImage.
  1760. If unsure, say N.
  1761. config XIP_PHYS_ADDR
  1762. hex "XIP Kernel Physical Location"
  1763. depends on XIP_KERNEL
  1764. default "0x00080000"
  1765. help
  1766. This is the physical address in your flash memory the kernel will
  1767. be linked for and stored to. This address is dependent on your
  1768. own flash usage.
  1769. config KEXEC
  1770. bool "Kexec system call (EXPERIMENTAL)"
  1771. depends on EXPERIMENTAL && (!SMP || HOTPLUG_CPU)
  1772. help
  1773. kexec is a system call that implements the ability to shutdown your
  1774. current kernel, and to start another kernel. It is like a reboot
  1775. but it is independent of the system firmware. And like a reboot
  1776. you can start any kernel with it, not just Linux.
  1777. It is an ongoing process to be certain the hardware in a machine
  1778. is properly shutdown, so do not be surprised if this code does not
  1779. initially work for you. It may help to enable device hotplugging
  1780. support.
  1781. config ATAGS_PROC
  1782. bool "Export atags in procfs"
  1783. depends on ATAGS && KEXEC
  1784. default y
  1785. help
  1786. Should the atags used to boot the kernel be exported in an "atags"
  1787. file in procfs. Useful with kexec.
  1788. config CRASH_DUMP
  1789. bool "Build kdump crash kernel (EXPERIMENTAL)"
  1790. depends on EXPERIMENTAL
  1791. help
  1792. Generate crash dump after being started by kexec. This should
  1793. be normally only set in special crash dump kernels which are
  1794. loaded in the main kernel with kexec-tools into a specially
  1795. reserved region and then later executed after a crash by
  1796. kdump/kexec. The crash dump kernel must be compiled to a
  1797. memory address not used by the main kernel
  1798. For more details see Documentation/kdump/kdump.txt
  1799. config AUTO_ZRELADDR
  1800. bool "Auto calculation of the decompressed kernel image address"
  1801. depends on !ZBOOT_ROM && !ARCH_U300
  1802. help
  1803. ZRELADDR is the physical address where the decompressed kernel
  1804. image will be placed. If AUTO_ZRELADDR is selected, the address
  1805. will be determined at run-time by masking the current IP with
  1806. 0xf8000000. This assumes the zImage being placed in the first 128MB
  1807. from start of memory.
  1808. endmenu
  1809. menu "CPU Power Management"
  1810. if ARCH_HAS_CPUFREQ
  1811. source "drivers/cpufreq/Kconfig"
  1812. config CPU_FREQ_IMX
  1813. tristate "CPUfreq driver for i.MX CPUs"
  1814. depends on ARCH_MXC && CPU_FREQ
  1815. select CPU_FREQ_TABLE
  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_DEFAULT_GOV_USERSPACE
  1835. select CPU_FREQ_TABLE
  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
  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"