Kconfig 66 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_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
  8. select ARCH_WANT_IPC_PARSE_VERSION
  9. select BUILDTIME_EXTABLE_SORT if MMU
  10. select CPU_PM if (SUSPEND || CPU_IDLE)
  11. select DCACHE_WORD_ACCESS if (CPU_V6 || CPU_V6K || CPU_V7) && !CPU_BIG_ENDIAN && MMU
  12. select GENERIC_ATOMIC64 if (CPU_V6 || !CPU_32v6K || !AEABI)
  13. select GENERIC_CLOCKEVENTS_BROADCAST if SMP
  14. select GENERIC_IRQ_PROBE
  15. select GENERIC_IRQ_SHOW
  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_SECCOMP_FILTER
  25. select HAVE_ARCH_TRACEHOOK
  26. select HAVE_BPF_JIT
  27. select HAVE_C_RECORDMCOUNT
  28. select HAVE_DEBUG_KMEMLEAK
  29. select HAVE_DMA_API_DEBUG
  30. select HAVE_DMA_ATTRS
  31. select HAVE_DMA_CONTIGUOUS if MMU
  32. select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL)
  33. select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
  34. select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL)
  35. select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
  36. select HAVE_GENERIC_DMA_COHERENT
  37. select HAVE_GENERIC_HARDIRQS
  38. select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7))
  39. select HAVE_IDE if PCI || ISA || PCMCIA
  40. select HAVE_IRQ_WORK
  41. select HAVE_KERNEL_GZIP
  42. select HAVE_KERNEL_LZMA
  43. select HAVE_KERNEL_LZO
  44. select HAVE_KERNEL_XZ
  45. select HAVE_KPROBES if !XIP_KERNEL
  46. select HAVE_KRETPROBES if (HAVE_KPROBES)
  47. select HAVE_MEMBLOCK
  48. select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
  49. select HAVE_PERF_EVENTS
  50. select HAVE_REGS_AND_STACK_ACCESS_API
  51. select HAVE_SYSCALL_TRACEPOINTS
  52. select HAVE_UID16
  53. select KTIME_SCALAR
  54. select PERF_USE_VMALLOC
  55. select RTC_LIB
  56. select SYS_SUPPORTS_APM_EMULATION
  57. select HAVE_MOD_ARCH_SPECIFIC if ARM_UNWIND
  58. select MODULES_USE_ELF_REL
  59. select CLONE_BACKWARDS
  60. help
  61. The ARM series is a line of low-power-consumption RISC chip designs
  62. licensed by ARM Ltd and targeted at embedded applications and
  63. handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
  64. manufactured, but legacy ARM-based PC hardware remains popular in
  65. Europe. There is an ARM Linux project with a web page at
  66. <http://www.arm.linux.org.uk/>.
  67. config ARM_HAS_SG_CHAIN
  68. bool
  69. config NEED_SG_DMA_LENGTH
  70. bool
  71. config ARM_DMA_USE_IOMMU
  72. bool
  73. select ARM_HAS_SG_CHAIN
  74. select NEED_SG_DMA_LENGTH
  75. config HAVE_PWM
  76. bool
  77. config MIGHT_HAVE_PCI
  78. bool
  79. config SYS_SUPPORTS_APM_EMULATION
  80. bool
  81. config GENERIC_GPIO
  82. bool
  83. config HAVE_TCM
  84. bool
  85. select GENERIC_ALLOCATOR
  86. config HAVE_PROC_CPU
  87. bool
  88. config NO_IOPORT
  89. bool
  90. config EISA
  91. bool
  92. ---help---
  93. The Extended Industry Standard Architecture (EISA) bus was
  94. developed as an open alternative to the IBM MicroChannel bus.
  95. The EISA bus provided some of the features of the IBM MicroChannel
  96. bus while maintaining backward compatibility with cards made for
  97. the older ISA bus. The EISA bus saw limited use between 1988 and
  98. 1995 when it was made obsolete by the PCI bus.
  99. Say Y here if you are building a kernel for an EISA-based machine.
  100. Otherwise, say N.
  101. config SBUS
  102. bool
  103. config STACKTRACE_SUPPORT
  104. bool
  105. default y
  106. config HAVE_LATENCYTOP_SUPPORT
  107. bool
  108. depends on !SMP
  109. default y
  110. config LOCKDEP_SUPPORT
  111. bool
  112. default y
  113. config TRACE_IRQFLAGS_SUPPORT
  114. bool
  115. default y
  116. config RWSEM_GENERIC_SPINLOCK
  117. bool
  118. default y
  119. config RWSEM_XCHGADD_ALGORITHM
  120. bool
  121. config ARCH_HAS_ILOG2_U32
  122. bool
  123. config ARCH_HAS_ILOG2_U64
  124. bool
  125. config ARCH_HAS_CPUFREQ
  126. bool
  127. help
  128. Internal node to signify that the ARCH has CPUFREQ support
  129. and that the relevant menu configurations are displayed for
  130. it.
  131. config GENERIC_HWEIGHT
  132. bool
  133. default y
  134. config GENERIC_CALIBRATE_DELAY
  135. bool
  136. default y
  137. config ARCH_MAY_HAVE_PC_FDC
  138. bool
  139. config ZONE_DMA
  140. bool
  141. config NEED_DMA_MAP_STATE
  142. def_bool y
  143. config ARCH_HAS_DMA_SET_COHERENT_MASK
  144. bool
  145. config GENERIC_ISA_DMA
  146. bool
  147. config FIQ
  148. bool
  149. config NEED_RET_TO_USER
  150. bool
  151. config ARCH_MTD_XIP
  152. bool
  153. config VECTORS_BASE
  154. hex
  155. default 0xffff0000 if MMU || CPU_HIGH_VECTOR
  156. default DRAM_BASE if REMAP_VECTORS_TO_RAM
  157. default 0x00000000
  158. help
  159. The base address of exception vectors.
  160. config ARM_PATCH_PHYS_VIRT
  161. bool "Patch physical to virtual translations at runtime" if EMBEDDED
  162. default y
  163. depends on !XIP_KERNEL && MMU
  164. depends on !ARCH_REALVIEW || !SPARSEMEM
  165. help
  166. Patch phys-to-virt and virt-to-phys translation functions at
  167. boot and module load time according to the position of the
  168. kernel in system memory.
  169. This can only be used with non-XIP MMU kernels where the base
  170. of physical memory is at a 16MB boundary.
  171. Only disable this option if you know that you do not require
  172. this feature (eg, building a kernel for a single machine) and
  173. you need to shrink the kernel to the minimal size.
  174. config NEED_MACH_GPIO_H
  175. bool
  176. help
  177. Select this when mach/gpio.h is required to provide special
  178. definitions for this platform. The need for mach/gpio.h should
  179. be avoided when possible.
  180. config NEED_MACH_IO_H
  181. bool
  182. help
  183. Select this when mach/io.h is required to provide special
  184. definitions for this platform. The need for mach/io.h should
  185. be avoided when possible.
  186. config NEED_MACH_MEMORY_H
  187. bool
  188. help
  189. Select this when mach/memory.h is required to provide special
  190. definitions for this platform. The need for mach/memory.h should
  191. be avoided when possible.
  192. config PHYS_OFFSET
  193. hex "Physical address of main memory" if MMU
  194. depends on !ARM_PATCH_PHYS_VIRT && !NEED_MACH_MEMORY_H
  195. default DRAM_BASE if !MMU
  196. help
  197. Please provide the physical address corresponding to the
  198. location of main memory in your system.
  199. config GENERIC_BUG
  200. def_bool y
  201. depends on BUG
  202. source "init/Kconfig"
  203. source "kernel/Kconfig.freezer"
  204. menu "System Type"
  205. config MMU
  206. bool "MMU-based Paged Memory Management Support"
  207. default y
  208. help
  209. Select if you want MMU-based virtualised addressing space
  210. support by paged memory management. If unsure, say 'Y'.
  211. #
  212. # The "ARM system type" choice list is ordered alphabetically by option
  213. # text. Please add new entries in the option alphabetic order.
  214. #
  215. choice
  216. prompt "ARM system type"
  217. default ARCH_MULTIPLATFORM
  218. config ARCH_MULTIPLATFORM
  219. bool "Allow multiple platforms to be selected"
  220. depends on MMU
  221. select ARM_PATCH_PHYS_VIRT
  222. select AUTO_ZRELADDR
  223. select COMMON_CLK
  224. select MULTI_IRQ_HANDLER
  225. select SPARSE_IRQ
  226. select USE_OF
  227. config ARCH_INTEGRATOR
  228. bool "ARM Ltd. Integrator family"
  229. select ARCH_HAS_CPUFREQ
  230. select ARM_AMBA
  231. select COMMON_CLK
  232. select COMMON_CLK_VERSATILE
  233. select GENERIC_CLOCKEVENTS
  234. select HAVE_TCM
  235. select ICST
  236. select MULTI_IRQ_HANDLER
  237. select NEED_MACH_MEMORY_H
  238. select PLAT_VERSATILE
  239. select SPARSE_IRQ
  240. select VERSATILE_FPGA_IRQ
  241. help
  242. Support for ARM's Integrator platform.
  243. config ARCH_REALVIEW
  244. bool "ARM Ltd. RealView family"
  245. select ARCH_WANT_OPTIONAL_GPIOLIB
  246. select ARM_AMBA
  247. select ARM_TIMER_SP804
  248. select COMMON_CLK
  249. select COMMON_CLK_VERSATILE
  250. select GENERIC_CLOCKEVENTS
  251. select GPIO_PL061 if GPIOLIB
  252. select ICST
  253. select NEED_MACH_MEMORY_H
  254. select PLAT_VERSATILE
  255. select PLAT_VERSATILE_CLCD
  256. help
  257. This enables support for ARM Ltd RealView boards.
  258. config ARCH_VERSATILE
  259. bool "ARM Ltd. Versatile family"
  260. select ARCH_WANT_OPTIONAL_GPIOLIB
  261. select ARM_AMBA
  262. select ARM_TIMER_SP804
  263. select ARM_VIC
  264. select CLKDEV_LOOKUP
  265. select GENERIC_CLOCKEVENTS
  266. select HAVE_MACH_CLKDEV
  267. select ICST
  268. select PLAT_VERSATILE
  269. select PLAT_VERSATILE_CLCD
  270. select PLAT_VERSATILE_CLOCK
  271. select VERSATILE_FPGA_IRQ
  272. help
  273. This enables support for ARM Ltd Versatile board.
  274. config ARCH_AT91
  275. bool "Atmel AT91"
  276. select ARCH_REQUIRE_GPIOLIB
  277. select CLKDEV_LOOKUP
  278. select HAVE_CLK
  279. select IRQ_DOMAIN
  280. select NEED_MACH_GPIO_H
  281. select NEED_MACH_IO_H if PCCARD
  282. select PINCTRL
  283. select PINCTRL_AT91 if USE_OF
  284. help
  285. This enables support for systems based on Atmel
  286. AT91RM9200 and AT91SAM9* processors.
  287. config ARCH_BCM2835
  288. bool "Broadcom BCM2835 family"
  289. select ARCH_REQUIRE_GPIOLIB
  290. select ARM_AMBA
  291. select ARM_ERRATA_411920
  292. select ARM_TIMER_SP804
  293. select CLKDEV_LOOKUP
  294. select COMMON_CLK
  295. select CPU_V6
  296. select GENERIC_CLOCKEVENTS
  297. select GENERIC_GPIO
  298. select MULTI_IRQ_HANDLER
  299. select PINCTRL
  300. select PINCTRL_BCM2835
  301. select SPARSE_IRQ
  302. select USE_OF
  303. help
  304. This enables support for the Broadcom BCM2835 SoC. This SoC is
  305. use in the Raspberry Pi, and Roku 2 devices.
  306. config ARCH_CNS3XXX
  307. bool "Cavium Networks CNS3XXX family"
  308. select ARM_GIC
  309. select CPU_V6K
  310. select GENERIC_CLOCKEVENTS
  311. select MIGHT_HAVE_CACHE_L2X0
  312. select MIGHT_HAVE_PCI
  313. select PCI_DOMAINS if PCI
  314. help
  315. Support for Cavium Networks CNS3XXX platform.
  316. config ARCH_CLPS711X
  317. bool "Cirrus Logic CLPS711x/EP721x/EP731x-based"
  318. select ARCH_REQUIRE_GPIOLIB
  319. select AUTO_ZRELADDR
  320. select CLKDEV_LOOKUP
  321. select COMMON_CLK
  322. select CPU_ARM720T
  323. select GENERIC_CLOCKEVENTS
  324. select MULTI_IRQ_HANDLER
  325. select NEED_MACH_MEMORY_H
  326. select SPARSE_IRQ
  327. help
  328. Support for Cirrus Logic 711x/721x/731x based boards.
  329. config ARCH_GEMINI
  330. bool "Cortina Systems Gemini"
  331. select ARCH_REQUIRE_GPIOLIB
  332. select ARCH_USES_GETTIMEOFFSET
  333. select CPU_FA526
  334. help
  335. Support for the Cortina Systems Gemini family SoCs
  336. config ARCH_SIRF
  337. bool "CSR SiRF"
  338. select ARCH_REQUIRE_GPIOLIB
  339. select COMMON_CLK
  340. select GENERIC_CLOCKEVENTS
  341. select GENERIC_IRQ_CHIP
  342. select MIGHT_HAVE_CACHE_L2X0
  343. select NO_IOPORT
  344. select PINCTRL
  345. select PINCTRL_SIRF
  346. select USE_OF
  347. help
  348. Support for CSR SiRFprimaII/Marco/Polo platforms
  349. config ARCH_EBSA110
  350. bool "EBSA-110"
  351. select ARCH_USES_GETTIMEOFFSET
  352. select CPU_SA110
  353. select ISA
  354. select NEED_MACH_IO_H
  355. select NEED_MACH_MEMORY_H
  356. select NO_IOPORT
  357. help
  358. This is an evaluation board for the StrongARM processor available
  359. from Digital. It has limited hardware on-board, including an
  360. Ethernet interface, two PCMCIA sockets, two serial ports and a
  361. parallel port.
  362. config ARCH_EP93XX
  363. bool "EP93xx-based"
  364. select ARCH_HAS_HOLES_MEMORYMODEL
  365. select ARCH_REQUIRE_GPIOLIB
  366. select ARCH_USES_GETTIMEOFFSET
  367. select ARM_AMBA
  368. select ARM_VIC
  369. select CLKDEV_LOOKUP
  370. select CPU_ARM920T
  371. select NEED_MACH_MEMORY_H
  372. help
  373. This enables support for the Cirrus EP93xx series of CPUs.
  374. config ARCH_FOOTBRIDGE
  375. bool "FootBridge"
  376. select CPU_SA110
  377. select FOOTBRIDGE
  378. select GENERIC_CLOCKEVENTS
  379. select HAVE_IDE
  380. select NEED_MACH_IO_H if !MMU
  381. select NEED_MACH_MEMORY_H
  382. help
  383. Support for systems based on the DC21285 companion chip
  384. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  385. config ARCH_MXS
  386. bool "Freescale MXS-based"
  387. select ARCH_REQUIRE_GPIOLIB
  388. select CLKDEV_LOOKUP
  389. select CLKSRC_MMIO
  390. select COMMON_CLK
  391. select GENERIC_CLOCKEVENTS
  392. select HAVE_CLK_PREPARE
  393. select MULTI_IRQ_HANDLER
  394. select PINCTRL
  395. select SPARSE_IRQ
  396. select USE_OF
  397. help
  398. Support for Freescale MXS-based family of processors
  399. config ARCH_NETX
  400. bool "Hilscher NetX based"
  401. select ARM_VIC
  402. select CLKSRC_MMIO
  403. select CPU_ARM926T
  404. select GENERIC_CLOCKEVENTS
  405. help
  406. This enables support for systems based on the Hilscher NetX Soc
  407. config ARCH_H720X
  408. bool "Hynix HMS720x-based"
  409. select ARCH_USES_GETTIMEOFFSET
  410. select CPU_ARM720T
  411. select ISA_DMA_API
  412. help
  413. This enables support for systems based on the Hynix HMS720x
  414. config ARCH_IOP13XX
  415. bool "IOP13xx-based"
  416. depends on MMU
  417. select ARCH_SUPPORTS_MSI
  418. select CPU_XSC3
  419. select NEED_MACH_MEMORY_H
  420. select NEED_RET_TO_USER
  421. select PCI
  422. select PLAT_IOP
  423. select VMSPLIT_1G
  424. help
  425. Support for Intel's IOP13XX (XScale) family of processors.
  426. config ARCH_IOP32X
  427. bool "IOP32x-based"
  428. depends on MMU
  429. select ARCH_REQUIRE_GPIOLIB
  430. select CPU_XSCALE
  431. select NEED_MACH_GPIO_H
  432. select NEED_RET_TO_USER
  433. select PCI
  434. select PLAT_IOP
  435. help
  436. Support for Intel's 80219 and IOP32X (XScale) family of
  437. processors.
  438. config ARCH_IOP33X
  439. bool "IOP33x-based"
  440. depends on MMU
  441. select ARCH_REQUIRE_GPIOLIB
  442. select CPU_XSCALE
  443. select NEED_MACH_GPIO_H
  444. select NEED_RET_TO_USER
  445. select PCI
  446. select PLAT_IOP
  447. help
  448. Support for Intel's IOP33X (XScale) family of processors.
  449. config ARCH_IXP4XX
  450. bool "IXP4xx-based"
  451. depends on MMU
  452. select ARCH_HAS_DMA_SET_COHERENT_MASK
  453. select ARCH_REQUIRE_GPIOLIB
  454. select CLKSRC_MMIO
  455. select CPU_XSCALE
  456. select DMABOUNCE if PCI
  457. select GENERIC_CLOCKEVENTS
  458. select MIGHT_HAVE_PCI
  459. select NEED_MACH_IO_H
  460. help
  461. Support for Intel's IXP4XX (XScale) family of processors.
  462. config ARCH_DOVE
  463. bool "Marvell Dove"
  464. select ARCH_REQUIRE_GPIOLIB
  465. select COMMON_CLK_DOVE
  466. select CPU_V7
  467. select GENERIC_CLOCKEVENTS
  468. select MIGHT_HAVE_PCI
  469. select PINCTRL
  470. select PINCTRL_DOVE
  471. select PLAT_ORION_LEGACY
  472. select USB_ARCH_HAS_EHCI
  473. help
  474. Support for the Marvell Dove SoC 88AP510
  475. config ARCH_KIRKWOOD
  476. bool "Marvell Kirkwood"
  477. select ARCH_REQUIRE_GPIOLIB
  478. select CPU_FEROCEON
  479. select GENERIC_CLOCKEVENTS
  480. select PCI
  481. select PCI_QUIRKS
  482. select PINCTRL
  483. select PINCTRL_KIRKWOOD
  484. select PLAT_ORION_LEGACY
  485. help
  486. Support for the following Marvell Kirkwood series SoCs:
  487. 88F6180, 88F6192 and 88F6281.
  488. config ARCH_MV78XX0
  489. bool "Marvell MV78xx0"
  490. select ARCH_REQUIRE_GPIOLIB
  491. select CPU_FEROCEON
  492. select GENERIC_CLOCKEVENTS
  493. select PCI
  494. select PLAT_ORION_LEGACY
  495. help
  496. Support for the following Marvell MV78xx0 series SoCs:
  497. MV781x0, MV782x0.
  498. config ARCH_ORION5X
  499. bool "Marvell Orion"
  500. depends on MMU
  501. select ARCH_REQUIRE_GPIOLIB
  502. select CPU_FEROCEON
  503. select GENERIC_CLOCKEVENTS
  504. select PCI
  505. select PLAT_ORION_LEGACY
  506. help
  507. Support for the following Marvell Orion 5x series SoCs:
  508. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  509. Orion-2 (5281), Orion-1-90 (6183).
  510. config ARCH_MMP
  511. bool "Marvell PXA168/910/MMP2"
  512. depends on MMU
  513. select ARCH_REQUIRE_GPIOLIB
  514. select CLKDEV_LOOKUP
  515. select GENERIC_ALLOCATOR
  516. select GENERIC_CLOCKEVENTS
  517. select GPIO_PXA
  518. select IRQ_DOMAIN
  519. select NEED_MACH_GPIO_H
  520. select PINCTRL
  521. select PLAT_PXA
  522. select SPARSE_IRQ
  523. help
  524. Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
  525. config ARCH_KS8695
  526. bool "Micrel/Kendin KS8695"
  527. select ARCH_REQUIRE_GPIOLIB
  528. select CLKSRC_MMIO
  529. select CPU_ARM922T
  530. select GENERIC_CLOCKEVENTS
  531. select NEED_MACH_MEMORY_H
  532. help
  533. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  534. System-on-Chip devices.
  535. config ARCH_W90X900
  536. bool "Nuvoton W90X900 CPU"
  537. select ARCH_REQUIRE_GPIOLIB
  538. select CLKDEV_LOOKUP
  539. select CLKSRC_MMIO
  540. select CPU_ARM926T
  541. select GENERIC_CLOCKEVENTS
  542. help
  543. Support for Nuvoton (Winbond logic dept.) ARM9 processor,
  544. At present, the w90x900 has been renamed nuc900, regarding
  545. the ARM series product line, you can login the following
  546. link address to know more.
  547. <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
  548. ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
  549. config ARCH_LPC32XX
  550. bool "NXP LPC32XX"
  551. select ARCH_REQUIRE_GPIOLIB
  552. select ARM_AMBA
  553. select CLKDEV_LOOKUP
  554. select CLKSRC_MMIO
  555. select CPU_ARM926T
  556. select GENERIC_CLOCKEVENTS
  557. select HAVE_IDE
  558. select HAVE_PWM
  559. select USB_ARCH_HAS_OHCI
  560. select USE_OF
  561. help
  562. Support for the NXP LPC32XX family of processors
  563. config ARCH_TEGRA
  564. bool "NVIDIA Tegra"
  565. select ARCH_HAS_CPUFREQ
  566. select CLKDEV_LOOKUP
  567. select CLKSRC_MMIO
  568. select COMMON_CLK
  569. select GENERIC_CLOCKEVENTS
  570. select GENERIC_GPIO
  571. select HAVE_CLK
  572. select HAVE_SMP
  573. select MIGHT_HAVE_CACHE_L2X0
  574. select SPARSE_IRQ
  575. select USE_OF
  576. help
  577. This enables support for NVIDIA Tegra based systems (Tegra APX,
  578. Tegra 6xx and Tegra 2 series).
  579. config ARCH_PXA
  580. bool "PXA2xx/PXA3xx-based"
  581. depends on MMU
  582. select ARCH_HAS_CPUFREQ
  583. select ARCH_MTD_XIP
  584. select ARCH_REQUIRE_GPIOLIB
  585. select ARM_CPU_SUSPEND if PM
  586. select AUTO_ZRELADDR
  587. select CLKDEV_LOOKUP
  588. select CLKSRC_MMIO
  589. select GENERIC_CLOCKEVENTS
  590. select GPIO_PXA
  591. select HAVE_IDE
  592. select MULTI_IRQ_HANDLER
  593. select NEED_MACH_GPIO_H
  594. select PLAT_PXA
  595. select SPARSE_IRQ
  596. help
  597. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  598. config ARCH_MSM
  599. bool "Qualcomm MSM"
  600. select ARCH_REQUIRE_GPIOLIB
  601. select CLKDEV_LOOKUP
  602. select GENERIC_CLOCKEVENTS
  603. select HAVE_CLK
  604. help
  605. Support for Qualcomm MSM/QSD based systems. This runs on the
  606. apps processor of the MSM/QSD and depends on a shared memory
  607. interface to the modem processor which runs the baseband
  608. stack and controls some vital subsystems
  609. (clock and power control, etc).
  610. config ARCH_SHMOBILE
  611. bool "Renesas SH-Mobile / R-Mobile"
  612. select CLKDEV_LOOKUP
  613. select GENERIC_CLOCKEVENTS
  614. select HAVE_CLK
  615. select HAVE_MACH_CLKDEV
  616. select HAVE_SMP
  617. select MIGHT_HAVE_CACHE_L2X0
  618. select MULTI_IRQ_HANDLER
  619. select NEED_MACH_MEMORY_H
  620. select NO_IOPORT
  621. select PM_GENERIC_DOMAINS if PM
  622. select SPARSE_IRQ
  623. help
  624. Support for Renesas's SH-Mobile and R-Mobile ARM platforms.
  625. config ARCH_RPC
  626. bool "RiscPC"
  627. select ARCH_ACORN
  628. select ARCH_MAY_HAVE_PC_FDC
  629. select ARCH_SPARSEMEM_ENABLE
  630. select ARCH_USES_GETTIMEOFFSET
  631. select FIQ
  632. select HAVE_IDE
  633. select HAVE_PATA_PLATFORM
  634. select ISA_DMA_API
  635. select NEED_MACH_IO_H
  636. select NEED_MACH_MEMORY_H
  637. select NO_IOPORT
  638. help
  639. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  640. CD-ROM interface, serial and parallel port, and the floppy drive.
  641. config ARCH_SA1100
  642. bool "SA1100-based"
  643. select ARCH_HAS_CPUFREQ
  644. select ARCH_MTD_XIP
  645. select ARCH_REQUIRE_GPIOLIB
  646. select ARCH_SPARSEMEM_ENABLE
  647. select CLKDEV_LOOKUP
  648. select CLKSRC_MMIO
  649. select CPU_FREQ
  650. select CPU_SA1100
  651. select GENERIC_CLOCKEVENTS
  652. select HAVE_IDE
  653. select ISA
  654. select NEED_MACH_GPIO_H
  655. select NEED_MACH_MEMORY_H
  656. select SPARSE_IRQ
  657. help
  658. Support for StrongARM 11x0 based boards.
  659. config ARCH_S3C24XX
  660. bool "Samsung S3C24XX SoCs"
  661. select ARCH_HAS_CPUFREQ
  662. select ARCH_USES_GETTIMEOFFSET
  663. select CLKDEV_LOOKUP
  664. select GENERIC_GPIO
  665. select HAVE_CLK
  666. select HAVE_S3C2410_I2C if I2C
  667. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  668. select HAVE_S3C_RTC if RTC_CLASS
  669. select NEED_MACH_GPIO_H
  670. select NEED_MACH_IO_H
  671. help
  672. Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443
  673. and S3C2450 SoCs based systems, such as the Simtec Electronics BAST
  674. (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or the
  675. Samsung SMDK2410 development board (and derivatives).
  676. config ARCH_S3C64XX
  677. bool "Samsung S3C64XX"
  678. select ARCH_HAS_CPUFREQ
  679. select ARCH_REQUIRE_GPIOLIB
  680. select ARCH_USES_GETTIMEOFFSET
  681. select ARM_VIC
  682. select CLKDEV_LOOKUP
  683. select CPU_V6
  684. select HAVE_CLK
  685. select HAVE_S3C2410_I2C if I2C
  686. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  687. select HAVE_TCM
  688. select NEED_MACH_GPIO_H
  689. select NO_IOPORT
  690. select PLAT_SAMSUNG
  691. select S3C_DEV_NAND
  692. select S3C_GPIO_TRACK
  693. select SAMSUNG_CLKSRC
  694. select SAMSUNG_GPIOLIB_4BIT
  695. select SAMSUNG_IRQ_VIC_TIMER
  696. select USB_ARCH_HAS_OHCI
  697. help
  698. Samsung S3C64XX series based systems
  699. config ARCH_S5P64X0
  700. bool "Samsung S5P6440 S5P6450"
  701. select CLKDEV_LOOKUP
  702. select CLKSRC_MMIO
  703. select CPU_V6
  704. select GENERIC_CLOCKEVENTS
  705. select GENERIC_GPIO
  706. select HAVE_CLK
  707. select HAVE_S3C2410_I2C if I2C
  708. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  709. select HAVE_S3C_RTC if RTC_CLASS
  710. select NEED_MACH_GPIO_H
  711. help
  712. Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
  713. SMDK6450.
  714. config ARCH_S5PC100
  715. bool "Samsung S5PC100"
  716. select ARCH_USES_GETTIMEOFFSET
  717. select CLKDEV_LOOKUP
  718. select CPU_V7
  719. select GENERIC_GPIO
  720. select HAVE_CLK
  721. select HAVE_S3C2410_I2C if I2C
  722. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  723. select HAVE_S3C_RTC if RTC_CLASS
  724. select NEED_MACH_GPIO_H
  725. help
  726. Samsung S5PC100 series based systems
  727. config ARCH_S5PV210
  728. bool "Samsung S5PV210/S5PC110"
  729. select ARCH_HAS_CPUFREQ
  730. select ARCH_HAS_HOLES_MEMORYMODEL
  731. select ARCH_SPARSEMEM_ENABLE
  732. select CLKDEV_LOOKUP
  733. select CLKSRC_MMIO
  734. select CPU_V7
  735. select GENERIC_CLOCKEVENTS
  736. select GENERIC_GPIO
  737. select HAVE_CLK
  738. select HAVE_S3C2410_I2C if I2C
  739. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  740. select HAVE_S3C_RTC if RTC_CLASS
  741. select NEED_MACH_GPIO_H
  742. select NEED_MACH_MEMORY_H
  743. help
  744. Samsung S5PV210/S5PC110 series based systems
  745. config ARCH_EXYNOS
  746. bool "Samsung EXYNOS"
  747. select ARCH_HAS_CPUFREQ
  748. select ARCH_HAS_HOLES_MEMORYMODEL
  749. select ARCH_SPARSEMEM_ENABLE
  750. select CLKDEV_LOOKUP
  751. select CPU_V7
  752. select GENERIC_CLOCKEVENTS
  753. select GENERIC_GPIO
  754. select HAVE_CLK
  755. select HAVE_S3C2410_I2C if I2C
  756. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  757. select HAVE_S3C_RTC if RTC_CLASS
  758. select NEED_MACH_GPIO_H
  759. select NEED_MACH_MEMORY_H
  760. help
  761. Support for SAMSUNG's EXYNOS SoCs (EXYNOS4/5)
  762. config ARCH_SHARK
  763. bool "Shark"
  764. select ARCH_USES_GETTIMEOFFSET
  765. select CPU_SA110
  766. select ISA
  767. select ISA_DMA
  768. select NEED_MACH_MEMORY_H
  769. select PCI
  770. select ZONE_DMA
  771. help
  772. Support for the StrongARM based Digital DNARD machine, also known
  773. as "Shark" (<http://www.shark-linux.de/shark.html>).
  774. config ARCH_U300
  775. bool "ST-Ericsson U300 Series"
  776. depends on MMU
  777. select ARCH_REQUIRE_GPIOLIB
  778. select ARM_AMBA
  779. select ARM_PATCH_PHYS_VIRT
  780. select ARM_VIC
  781. select CLKDEV_LOOKUP
  782. select CLKSRC_MMIO
  783. select COMMON_CLK
  784. select CPU_ARM926T
  785. select GENERIC_CLOCKEVENTS
  786. select GENERIC_GPIO
  787. select HAVE_TCM
  788. select SPARSE_IRQ
  789. help
  790. Support for ST-Ericsson U300 series mobile platforms.
  791. config ARCH_U8500
  792. bool "ST-Ericsson U8500 Series"
  793. depends on MMU
  794. select ARCH_HAS_CPUFREQ
  795. select ARCH_REQUIRE_GPIOLIB
  796. select ARM_AMBA
  797. select CLKDEV_LOOKUP
  798. select CPU_V7
  799. select GENERIC_CLOCKEVENTS
  800. select HAVE_SMP
  801. select MIGHT_HAVE_CACHE_L2X0
  802. select SPARSE_IRQ
  803. help
  804. Support for ST-Ericsson's Ux500 architecture
  805. config ARCH_NOMADIK
  806. bool "STMicroelectronics Nomadik"
  807. select ARCH_REQUIRE_GPIOLIB
  808. select ARM_AMBA
  809. select ARM_VIC
  810. select COMMON_CLK
  811. select CPU_ARM926T
  812. select GENERIC_CLOCKEVENTS
  813. select MIGHT_HAVE_CACHE_L2X0
  814. select PINCTRL
  815. select PINCTRL_STN8815
  816. select SPARSE_IRQ
  817. help
  818. Support for the Nomadik platform by ST-Ericsson
  819. config PLAT_SPEAR
  820. bool "ST SPEAr"
  821. select ARCH_HAS_CPUFREQ
  822. select ARCH_REQUIRE_GPIOLIB
  823. select ARM_AMBA
  824. select CLKDEV_LOOKUP
  825. select CLKSRC_MMIO
  826. select COMMON_CLK
  827. select GENERIC_CLOCKEVENTS
  828. select HAVE_CLK
  829. help
  830. Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
  831. config ARCH_DAVINCI
  832. bool "TI DaVinci"
  833. select ARCH_HAS_HOLES_MEMORYMODEL
  834. select ARCH_REQUIRE_GPIOLIB
  835. select CLKDEV_LOOKUP
  836. select GENERIC_ALLOCATOR
  837. select GENERIC_CLOCKEVENTS
  838. select GENERIC_IRQ_CHIP
  839. select HAVE_IDE
  840. select NEED_MACH_GPIO_H
  841. select USE_OF
  842. select ZONE_DMA
  843. help
  844. Support for TI's DaVinci platform.
  845. config ARCH_OMAP
  846. bool "TI OMAP"
  847. depends on MMU
  848. select ARCH_HAS_CPUFREQ
  849. select ARCH_HAS_HOLES_MEMORYMODEL
  850. select ARCH_REQUIRE_GPIOLIB
  851. select CLKSRC_MMIO
  852. select GENERIC_CLOCKEVENTS
  853. select HAVE_CLK
  854. help
  855. Support for TI's OMAP platform (OMAP1/2/3/4).
  856. config ARCH_VT8500_SINGLE
  857. bool "VIA/WonderMedia 85xx"
  858. select ARCH_HAS_CPUFREQ
  859. select ARCH_REQUIRE_GPIOLIB
  860. select CLKDEV_LOOKUP
  861. select COMMON_CLK
  862. select CPU_ARM926T
  863. select GENERIC_CLOCKEVENTS
  864. select GENERIC_GPIO
  865. select HAVE_CLK
  866. select MULTI_IRQ_HANDLER
  867. select SPARSE_IRQ
  868. select USE_OF
  869. help
  870. Support for VIA/WonderMedia VT8500/WM85xx System-on-Chip.
  871. endchoice
  872. menu "Multiple platform selection"
  873. depends on ARCH_MULTIPLATFORM
  874. comment "CPU Core family selection"
  875. config ARCH_MULTI_V4
  876. bool "ARMv4 based platforms (FA526, StrongARM)"
  877. depends on !ARCH_MULTI_V6_V7
  878. select ARCH_MULTI_V4_V5
  879. config ARCH_MULTI_V4T
  880. bool "ARMv4T based platforms (ARM720T, ARM920T, ...)"
  881. depends on !ARCH_MULTI_V6_V7
  882. select ARCH_MULTI_V4_V5
  883. config ARCH_MULTI_V5
  884. bool "ARMv5 based platforms (ARM926T, XSCALE, PJ1, ...)"
  885. depends on !ARCH_MULTI_V6_V7
  886. select ARCH_MULTI_V4_V5
  887. config ARCH_MULTI_V4_V5
  888. bool
  889. config ARCH_MULTI_V6
  890. bool "ARMv6 based platforms (ARM11, Scorpion, ...)"
  891. select ARCH_MULTI_V6_V7
  892. select CPU_V6
  893. config ARCH_MULTI_V7
  894. bool "ARMv7 based platforms (Cortex-A, PJ4, Krait)"
  895. default y
  896. select ARCH_MULTI_V6_V7
  897. select ARCH_VEXPRESS
  898. select CPU_V7
  899. config ARCH_MULTI_V6_V7
  900. bool
  901. config ARCH_MULTI_CPU_AUTO
  902. def_bool !(ARCH_MULTI_V4 || ARCH_MULTI_V4T || ARCH_MULTI_V6_V7)
  903. select ARCH_MULTI_V5
  904. endmenu
  905. #
  906. # This is sorted alphabetically by mach-* pathname. However, plat-*
  907. # Kconfigs may be included either alphabetically (according to the
  908. # plat- suffix) or along side the corresponding mach-* source.
  909. #
  910. source "arch/arm/mach-mvebu/Kconfig"
  911. source "arch/arm/mach-at91/Kconfig"
  912. source "arch/arm/mach-bcm/Kconfig"
  913. source "arch/arm/mach-clps711x/Kconfig"
  914. source "arch/arm/mach-cns3xxx/Kconfig"
  915. source "arch/arm/mach-davinci/Kconfig"
  916. source "arch/arm/mach-dove/Kconfig"
  917. source "arch/arm/mach-ep93xx/Kconfig"
  918. source "arch/arm/mach-footbridge/Kconfig"
  919. source "arch/arm/mach-gemini/Kconfig"
  920. source "arch/arm/mach-h720x/Kconfig"
  921. source "arch/arm/mach-highbank/Kconfig"
  922. source "arch/arm/mach-integrator/Kconfig"
  923. source "arch/arm/mach-iop32x/Kconfig"
  924. source "arch/arm/mach-iop33x/Kconfig"
  925. source "arch/arm/mach-iop13xx/Kconfig"
  926. source "arch/arm/mach-ixp4xx/Kconfig"
  927. source "arch/arm/mach-kirkwood/Kconfig"
  928. source "arch/arm/mach-ks8695/Kconfig"
  929. source "arch/arm/mach-msm/Kconfig"
  930. source "arch/arm/mach-mv78xx0/Kconfig"
  931. source "arch/arm/mach-imx/Kconfig"
  932. source "arch/arm/mach-mxs/Kconfig"
  933. source "arch/arm/mach-netx/Kconfig"
  934. source "arch/arm/mach-nomadik/Kconfig"
  935. source "arch/arm/plat-omap/Kconfig"
  936. source "arch/arm/mach-omap1/Kconfig"
  937. source "arch/arm/mach-omap2/Kconfig"
  938. source "arch/arm/mach-orion5x/Kconfig"
  939. source "arch/arm/mach-picoxcell/Kconfig"
  940. source "arch/arm/mach-pxa/Kconfig"
  941. source "arch/arm/plat-pxa/Kconfig"
  942. source "arch/arm/mach-mmp/Kconfig"
  943. source "arch/arm/mach-realview/Kconfig"
  944. source "arch/arm/mach-sa1100/Kconfig"
  945. source "arch/arm/plat-samsung/Kconfig"
  946. source "arch/arm/plat-s3c24xx/Kconfig"
  947. source "arch/arm/mach-socfpga/Kconfig"
  948. source "arch/arm/plat-spear/Kconfig"
  949. source "arch/arm/mach-s3c24xx/Kconfig"
  950. if ARCH_S3C24XX
  951. source "arch/arm/mach-s3c2412/Kconfig"
  952. source "arch/arm/mach-s3c2440/Kconfig"
  953. endif
  954. if ARCH_S3C64XX
  955. source "arch/arm/mach-s3c64xx/Kconfig"
  956. endif
  957. source "arch/arm/mach-s5p64x0/Kconfig"
  958. source "arch/arm/mach-s5pc100/Kconfig"
  959. source "arch/arm/mach-s5pv210/Kconfig"
  960. source "arch/arm/mach-exynos/Kconfig"
  961. source "arch/arm/mach-shmobile/Kconfig"
  962. source "arch/arm/mach-sunxi/Kconfig"
  963. source "arch/arm/mach-prima2/Kconfig"
  964. source "arch/arm/mach-tegra/Kconfig"
  965. source "arch/arm/mach-u300/Kconfig"
  966. source "arch/arm/mach-ux500/Kconfig"
  967. source "arch/arm/mach-versatile/Kconfig"
  968. source "arch/arm/mach-vexpress/Kconfig"
  969. source "arch/arm/plat-versatile/Kconfig"
  970. source "arch/arm/mach-vt8500/Kconfig"
  971. source "arch/arm/mach-w90x900/Kconfig"
  972. source "arch/arm/mach-zynq/Kconfig"
  973. # Definitions to make life easier
  974. config ARCH_ACORN
  975. bool
  976. config PLAT_IOP
  977. bool
  978. select GENERIC_CLOCKEVENTS
  979. config PLAT_ORION
  980. bool
  981. select CLKSRC_MMIO
  982. select COMMON_CLK
  983. select GENERIC_IRQ_CHIP
  984. select IRQ_DOMAIN
  985. config PLAT_ORION_LEGACY
  986. bool
  987. select PLAT_ORION
  988. config PLAT_PXA
  989. bool
  990. config PLAT_VERSATILE
  991. bool
  992. config ARM_TIMER_SP804
  993. bool
  994. select CLKSRC_MMIO
  995. select HAVE_SCHED_CLOCK
  996. source arch/arm/mm/Kconfig
  997. config ARM_NR_BANKS
  998. int
  999. default 16 if ARCH_EP93XX
  1000. default 8
  1001. config IWMMXT
  1002. bool "Enable iWMMXt support"
  1003. depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
  1004. default y if PXA27x || PXA3xx || ARCH_MMP
  1005. help
  1006. Enable support for iWMMXt context switching at run time if
  1007. running on a CPU that supports it.
  1008. config XSCALE_PMU
  1009. bool
  1010. depends on CPU_XSCALE
  1011. default y
  1012. config MULTI_IRQ_HANDLER
  1013. bool
  1014. help
  1015. Allow each machine to specify it's own IRQ handler at run time.
  1016. if !MMU
  1017. source "arch/arm/Kconfig-nommu"
  1018. endif
  1019. config ARM_ERRATA_326103
  1020. bool "ARM errata: FSR write bit incorrect on a SWP to read-only memory"
  1021. depends on CPU_V6
  1022. help
  1023. Executing a SWP instruction to read-only memory does not set bit 11
  1024. of the FSR on the ARM 1136 prior to r1p0. This causes the kernel to
  1025. treat the access as a read, preventing a COW from occurring and
  1026. causing the faulting task to livelock.
  1027. config ARM_ERRATA_411920
  1028. bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
  1029. depends on CPU_V6 || CPU_V6K
  1030. help
  1031. Invalidation of the Instruction Cache operation can
  1032. fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
  1033. It does not affect the MPCore. This option enables the ARM Ltd.
  1034. recommended workaround.
  1035. config ARM_ERRATA_430973
  1036. bool "ARM errata: Stale prediction on replaced interworking branch"
  1037. depends on CPU_V7
  1038. help
  1039. This option enables the workaround for the 430973 Cortex-A8
  1040. (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
  1041. interworking branch is replaced with another code sequence at the
  1042. same virtual address, whether due to self-modifying code or virtual
  1043. to physical address re-mapping, Cortex-A8 does not recover from the
  1044. stale interworking branch prediction. This results in Cortex-A8
  1045. executing the new code sequence in the incorrect ARM or Thumb state.
  1046. The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
  1047. and also flushes the branch target cache at every context switch.
  1048. Note that setting specific bits in the ACTLR register may not be
  1049. available in non-secure mode.
  1050. config ARM_ERRATA_458693
  1051. bool "ARM errata: Processor deadlock when a false hazard is created"
  1052. depends on CPU_V7
  1053. depends on !ARCH_MULTIPLATFORM
  1054. help
  1055. This option enables the workaround for the 458693 Cortex-A8 (r2p0)
  1056. erratum. For very specific sequences of memory operations, it is
  1057. possible for a hazard condition intended for a cache line to instead
  1058. be incorrectly associated with a different cache line. This false
  1059. hazard might then cause a processor deadlock. The workaround enables
  1060. the L1 caching of the NEON accesses and disables the PLD instruction
  1061. in the ACTLR register. Note that setting specific bits in the ACTLR
  1062. register may not be available in non-secure mode.
  1063. config ARM_ERRATA_460075
  1064. bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
  1065. depends on CPU_V7
  1066. depends on !ARCH_MULTIPLATFORM
  1067. help
  1068. This option enables the workaround for the 460075 Cortex-A8 (r2p0)
  1069. erratum. Any asynchronous access to the L2 cache may encounter a
  1070. situation in which recent store transactions to the L2 cache are lost
  1071. and overwritten with stale memory contents from external memory. The
  1072. workaround disables the write-allocate mode for the L2 cache via the
  1073. ACTLR register. Note that setting specific bits in the ACTLR register
  1074. may not be available in non-secure mode.
  1075. config ARM_ERRATA_742230
  1076. bool "ARM errata: DMB operation may be faulty"
  1077. depends on CPU_V7 && SMP
  1078. depends on !ARCH_MULTIPLATFORM
  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. depends on !ARCH_MULTIPLATFORM
  1091. help
  1092. This option enables the workaround for the 742231 Cortex-A9
  1093. (r2p0..r2p2) erratum. Under certain conditions, specific to the
  1094. Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
  1095. accessing some data located in the same cache line, may get corrupted
  1096. data due to bad handling of the address hazard when the line gets
  1097. replaced from one of the CPUs at the same time as another CPU is
  1098. accessing it. This workaround sets specific bits in the diagnostic
  1099. register of the Cortex-A9 which reduces the linefill issuing
  1100. capabilities of the processor.
  1101. config PL310_ERRATA_588369
  1102. bool "PL310 errata: Clean & Invalidate maintenance operations do not invalidate clean lines"
  1103. depends on CACHE_L2X0
  1104. help
  1105. The PL310 L2 cache controller implements three types of Clean &
  1106. Invalidate maintenance operations: by Physical Address
  1107. (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
  1108. They are architecturally defined to behave as the execution of a
  1109. clean operation followed immediately by an invalidate operation,
  1110. both performing to the same memory location. This functionality
  1111. is not correctly implemented in PL310 as clean lines are not
  1112. invalidated as a result of these operations.
  1113. config ARM_ERRATA_720789
  1114. bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
  1115. depends on CPU_V7
  1116. help
  1117. This option enables the workaround for the 720789 Cortex-A9 (prior to
  1118. r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
  1119. broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
  1120. As a consequence of this erratum, some TLB entries which should be
  1121. invalidated are not, resulting in an incoherency in the system page
  1122. tables. The workaround changes the TLB flushing routines to invalidate
  1123. entries regardless of the ASID.
  1124. config PL310_ERRATA_727915
  1125. bool "PL310 errata: Background Clean & Invalidate by Way operation can cause data corruption"
  1126. depends on CACHE_L2X0
  1127. help
  1128. PL310 implements the Clean & Invalidate by Way L2 cache maintenance
  1129. operation (offset 0x7FC). This operation runs in background so that
  1130. PL310 can handle normal accesses while it is in progress. Under very
  1131. rare circumstances, due to this erratum, write data can be lost when
  1132. PL310 treats a cacheable write transaction during a Clean &
  1133. Invalidate by Way operation.
  1134. config ARM_ERRATA_743622
  1135. bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
  1136. depends on CPU_V7
  1137. depends on !ARCH_MULTIPLATFORM
  1138. help
  1139. This option enables the workaround for the 743622 Cortex-A9
  1140. (r2p*) erratum. Under very rare conditions, a faulty
  1141. optimisation in the Cortex-A9 Store Buffer may lead to data
  1142. corruption. This workaround sets a specific bit in the diagnostic
  1143. register of the Cortex-A9 which disables the Store Buffer
  1144. optimisation, preventing the defect from occurring. This has no
  1145. visible impact on the overall performance or power consumption of the
  1146. processor.
  1147. config ARM_ERRATA_751472
  1148. bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
  1149. depends on CPU_V7
  1150. depends on !ARCH_MULTIPLATFORM
  1151. help
  1152. This option enables the workaround for the 751472 Cortex-A9 (prior
  1153. to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
  1154. completion of a following broadcasted operation if the second
  1155. operation is received by a CPU before the ICIALLUIS has completed,
  1156. potentially leading to corrupted entries in the cache or TLB.
  1157. config PL310_ERRATA_753970
  1158. bool "PL310 errata: cache sync operation may be faulty"
  1159. depends on CACHE_PL310
  1160. help
  1161. This option enables the workaround for the 753970 PL310 (r3p0) erratum.
  1162. Under some condition the effect of cache sync operation on
  1163. the store buffer still remains when the operation completes.
  1164. This means that the store buffer is always asked to drain and
  1165. this prevents it from merging any further writes. The workaround
  1166. is to replace the normal offset of cache sync operation (0x730)
  1167. by another offset targeting an unmapped PL310 register 0x740.
  1168. This has the same effect as the cache sync operation: store buffer
  1169. drain and waiting for all buffers empty.
  1170. config ARM_ERRATA_754322
  1171. bool "ARM errata: possible faulty MMU translations following an ASID switch"
  1172. depends on CPU_V7
  1173. help
  1174. This option enables the workaround for the 754322 Cortex-A9 (r2p*,
  1175. r3p*) erratum. A speculative memory access may cause a page table walk
  1176. which starts prior to an ASID switch but completes afterwards. This
  1177. can populate the micro-TLB with a stale entry which may be hit with
  1178. the new ASID. This workaround places two dsb instructions in the mm
  1179. switching code so that no page table walks can cross the ASID switch.
  1180. config ARM_ERRATA_754327
  1181. bool "ARM errata: no automatic Store Buffer drain"
  1182. depends on CPU_V7 && SMP
  1183. help
  1184. This option enables the workaround for the 754327 Cortex-A9 (prior to
  1185. r2p0) erratum. The Store Buffer does not have any automatic draining
  1186. mechanism and therefore a livelock may occur if an external agent
  1187. continuously polls a memory location waiting to observe an update.
  1188. This workaround defines cpu_relax() as smp_mb(), preventing correctly
  1189. written polling loops from denying visibility of updates to memory.
  1190. config ARM_ERRATA_364296
  1191. bool "ARM errata: Possible cache data corruption with hit-under-miss enabled"
  1192. depends on CPU_V6 && !SMP
  1193. help
  1194. This options enables the workaround for the 364296 ARM1136
  1195. r0p2 erratum (possible cache data corruption with
  1196. hit-under-miss enabled). It sets the undocumented bit 31 in
  1197. the auxiliary control register and the FI bit in the control
  1198. register, thus disabling hit-under-miss without putting the
  1199. processor into full low interrupt latency mode. ARM11MPCore
  1200. is not affected.
  1201. config ARM_ERRATA_764369
  1202. bool "ARM errata: Data cache line maintenance operation by MVA may not succeed"
  1203. depends on CPU_V7 && SMP
  1204. help
  1205. This option enables the workaround for erratum 764369
  1206. affecting Cortex-A9 MPCore with two or more processors (all
  1207. current revisions). Under certain timing circumstances, a data
  1208. cache line maintenance operation by MVA targeting an Inner
  1209. Shareable memory region may fail to proceed up to either the
  1210. Point of Coherency or to the Point of Unification of the
  1211. system. This workaround adds a DSB instruction before the
  1212. relevant cache maintenance functions and sets a specific bit
  1213. in the diagnostic control register of the SCU.
  1214. config PL310_ERRATA_769419
  1215. bool "PL310 errata: no automatic Store Buffer drain"
  1216. depends on CACHE_L2X0
  1217. help
  1218. On revisions of the PL310 prior to r3p2, the Store Buffer does
  1219. not automatically drain. This can cause normal, non-cacheable
  1220. writes to be retained when the memory system is idle, leading
  1221. to suboptimal I/O performance for drivers using coherent DMA.
  1222. This option adds a write barrier to the cpu_idle loop so that,
  1223. on systems with an outer cache, the store buffer is drained
  1224. explicitly.
  1225. config ARM_ERRATA_775420
  1226. bool "ARM errata: A data cache maintenance operation which aborts, might lead to deadlock"
  1227. depends on CPU_V7
  1228. help
  1229. This option enables the workaround for the 775420 Cortex-A9 (r2p2,
  1230. r2p6,r2p8,r2p10,r3p0) erratum. In case a date cache maintenance
  1231. operation aborts with MMU exception, it might cause the processor
  1232. to deadlock. This workaround puts DSB before executing ISB if
  1233. an abort may occur on cache maintenance.
  1234. endmenu
  1235. source "arch/arm/common/Kconfig"
  1236. menu "Bus support"
  1237. config ARM_AMBA
  1238. bool
  1239. config ISA
  1240. bool
  1241. help
  1242. Find out whether you have ISA slots on your motherboard. ISA is the
  1243. name of a bus system, i.e. the way the CPU talks to the other stuff
  1244. inside your box. Other bus systems are PCI, EISA, MicroChannel
  1245. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  1246. newer boards don't support it. If you have ISA, say Y, otherwise N.
  1247. # Select ISA DMA controller support
  1248. config ISA_DMA
  1249. bool
  1250. select ISA_DMA_API
  1251. # Select ISA DMA interface
  1252. config ISA_DMA_API
  1253. bool
  1254. config PCI
  1255. bool "PCI support" if MIGHT_HAVE_PCI
  1256. help
  1257. Find out whether you have a PCI motherboard. PCI is the name of a
  1258. bus system, i.e. the way the CPU talks to the other stuff inside
  1259. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  1260. VESA. If you have PCI, say Y, otherwise N.
  1261. config PCI_DOMAINS
  1262. bool
  1263. depends on PCI
  1264. config PCI_NANOENGINE
  1265. bool "BSE nanoEngine PCI support"
  1266. depends on SA1100_NANOENGINE
  1267. help
  1268. Enable PCI on the BSE nanoEngine board.
  1269. config PCI_SYSCALL
  1270. def_bool PCI
  1271. # Select the host bridge type
  1272. config PCI_HOST_VIA82C505
  1273. bool
  1274. depends on PCI && ARCH_SHARK
  1275. default y
  1276. config PCI_HOST_ITE8152
  1277. bool
  1278. depends on PCI && MACH_ARMCORE
  1279. default y
  1280. select DMABOUNCE
  1281. source "drivers/pci/Kconfig"
  1282. source "drivers/pcmcia/Kconfig"
  1283. endmenu
  1284. menu "Kernel Features"
  1285. config HAVE_SMP
  1286. bool
  1287. help
  1288. This option should be selected by machines which have an SMP-
  1289. capable CPU.
  1290. The only effect of this option is to make the SMP-related
  1291. options available to the user for configuration.
  1292. config SMP
  1293. bool "Symmetric Multi-Processing"
  1294. depends on CPU_V6K || CPU_V7
  1295. depends on GENERIC_CLOCKEVENTS
  1296. depends on HAVE_SMP
  1297. depends on MMU
  1298. select HAVE_ARM_SCU if !ARCH_MSM_SCORPIONMP
  1299. select USE_GENERIC_SMP_HELPERS
  1300. help
  1301. This enables support for systems with more than one CPU. If you have
  1302. a system with only one CPU, like most personal computers, say N. If
  1303. you have a system with more than one CPU, say Y.
  1304. If you say N here, the kernel will run on single and multiprocessor
  1305. machines, but will use only one CPU of a multiprocessor machine. If
  1306. you say Y here, the kernel will run on many, but not all, single
  1307. processor machines. On a single processor machine, the kernel will
  1308. run faster if you say N here.
  1309. See also <file:Documentation/x86/i386/IO-APIC.txt>,
  1310. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  1311. <http://tldp.org/HOWTO/SMP-HOWTO.html>.
  1312. If you don't know what to do here, say N.
  1313. config SMP_ON_UP
  1314. bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
  1315. depends on EXPERIMENTAL
  1316. depends on SMP && !XIP_KERNEL
  1317. default y
  1318. help
  1319. SMP kernels contain instructions which fail on non-SMP processors.
  1320. Enabling this option allows the kernel to modify itself to make
  1321. these instructions safe. Disabling it allows about 1K of space
  1322. savings.
  1323. If you don't know what to do here, say Y.
  1324. config ARM_CPU_TOPOLOGY
  1325. bool "Support cpu topology definition"
  1326. depends on SMP && CPU_V7
  1327. default y
  1328. help
  1329. Support ARM cpu topology definition. The MPIDR register defines
  1330. affinity between processors which is then used to describe the cpu
  1331. topology of an ARM System.
  1332. config SCHED_MC
  1333. bool "Multi-core scheduler support"
  1334. depends on ARM_CPU_TOPOLOGY
  1335. help
  1336. Multi-core scheduler support improves the CPU scheduler's decision
  1337. making when dealing with multi-core CPU chips at a cost of slightly
  1338. increased overhead in some places. If unsure say N here.
  1339. config SCHED_SMT
  1340. bool "SMT scheduler support"
  1341. depends on ARM_CPU_TOPOLOGY
  1342. help
  1343. Improves the CPU scheduler's decision making when dealing with
  1344. MultiThreading at a cost of slightly increased overhead in some
  1345. places. If unsure say N here.
  1346. config HAVE_ARM_SCU
  1347. bool
  1348. help
  1349. This option enables support for the ARM system coherency unit
  1350. config ARM_ARCH_TIMER
  1351. bool "Architected timer support"
  1352. depends on CPU_V7
  1353. help
  1354. This option enables support for the ARM architected timer
  1355. config HAVE_ARM_TWD
  1356. bool
  1357. depends on SMP
  1358. help
  1359. This options enables support for the ARM timer and watchdog unit
  1360. choice
  1361. prompt "Memory split"
  1362. default VMSPLIT_3G
  1363. help
  1364. Select the desired split between kernel and user memory.
  1365. If you are not absolutely sure what you are doing, leave this
  1366. option alone!
  1367. config VMSPLIT_3G
  1368. bool "3G/1G user/kernel split"
  1369. config VMSPLIT_2G
  1370. bool "2G/2G user/kernel split"
  1371. config VMSPLIT_1G
  1372. bool "1G/3G user/kernel split"
  1373. endchoice
  1374. config PAGE_OFFSET
  1375. hex
  1376. default 0x40000000 if VMSPLIT_1G
  1377. default 0x80000000 if VMSPLIT_2G
  1378. default 0xC0000000
  1379. config NR_CPUS
  1380. int "Maximum number of CPUs (2-32)"
  1381. range 2 32
  1382. depends on SMP
  1383. default "4"
  1384. config HOTPLUG_CPU
  1385. bool "Support for hot-pluggable CPUs"
  1386. depends on SMP && HOTPLUG
  1387. help
  1388. Say Y here to experiment with turning CPUs off and on. CPUs
  1389. can be controlled through /sys/devices/system/cpu.
  1390. config LOCAL_TIMERS
  1391. bool "Use local timer interrupts"
  1392. depends on SMP
  1393. default y
  1394. select HAVE_ARM_TWD if (!ARCH_MSM_SCORPIONMP && !EXYNOS4_MCT)
  1395. help
  1396. Enable support for local timers on SMP platforms, rather then the
  1397. legacy IPI broadcast method. Local timers allows the system
  1398. accounting to be spread across the timer interval, preventing a
  1399. "thundering herd" at every timer tick.
  1400. config ARCH_NR_GPIO
  1401. int
  1402. default 1024 if ARCH_SHMOBILE || ARCH_TEGRA
  1403. default 355 if ARCH_U8500
  1404. default 264 if MACH_H4700
  1405. default 512 if SOC_OMAP5
  1406. default 288 if ARCH_VT8500
  1407. default 0
  1408. help
  1409. Maximum number of GPIOs in the system.
  1410. If unsure, leave the default value.
  1411. source kernel/Kconfig.preempt
  1412. config HZ
  1413. int
  1414. default 200 if ARCH_EBSA110 || ARCH_S3C24XX || ARCH_S5P64X0 || \
  1415. ARCH_S5PV210 || ARCH_EXYNOS4
  1416. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  1417. default AT91_TIMER_HZ if ARCH_AT91
  1418. default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
  1419. default 100
  1420. config THUMB2_KERNEL
  1421. bool "Compile the kernel in Thumb-2 mode"
  1422. depends on CPU_V7 && !CPU_V6 && !CPU_V6K
  1423. select AEABI
  1424. select ARM_ASM_UNIFIED
  1425. select ARM_UNWIND
  1426. help
  1427. By enabling this option, the kernel will be compiled in
  1428. Thumb-2 mode. A compiler/assembler that understand the unified
  1429. ARM-Thumb syntax is needed.
  1430. If unsure, say N.
  1431. config THUMB2_AVOID_R_ARM_THM_JUMP11
  1432. bool "Work around buggy Thumb-2 short branch relocations in gas"
  1433. depends on THUMB2_KERNEL && MODULES
  1434. default y
  1435. help
  1436. Various binutils versions can resolve Thumb-2 branches to
  1437. locally-defined, preemptible global symbols as short-range "b.n"
  1438. branch instructions.
  1439. This is a problem, because there's no guarantee the final
  1440. destination of the symbol, or any candidate locations for a
  1441. trampoline, are within range of the branch. For this reason, the
  1442. kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
  1443. relocation in modules at all, and it makes little sense to add
  1444. support.
  1445. The symptom is that the kernel fails with an "unsupported
  1446. relocation" error when loading some modules.
  1447. Until fixed tools are available, passing
  1448. -fno-optimize-sibling-calls to gcc should prevent gcc generating
  1449. code which hits this problem, at the cost of a bit of extra runtime
  1450. stack usage in some cases.
  1451. The problem is described in more detail at:
  1452. https://bugs.launchpad.net/binutils-linaro/+bug/725126
  1453. Only Thumb-2 kernels are affected.
  1454. Unless you are sure your tools don't have this problem, say Y.
  1455. config ARM_ASM_UNIFIED
  1456. bool
  1457. config AEABI
  1458. bool "Use the ARM EABI to compile the kernel"
  1459. help
  1460. This option allows for the kernel to be compiled using the latest
  1461. ARM ABI (aka EABI). This is only useful if you are using a user
  1462. space environment that is also compiled with EABI.
  1463. Since there are major incompatibilities between the legacy ABI and
  1464. EABI, especially with regard to structure member alignment, this
  1465. option also changes the kernel syscall calling convention to
  1466. disambiguate both ABIs and allow for backward compatibility support
  1467. (selected with CONFIG_OABI_COMPAT).
  1468. To use this you need GCC version 4.0.0 or later.
  1469. config OABI_COMPAT
  1470. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  1471. depends on AEABI && EXPERIMENTAL && !THUMB2_KERNEL
  1472. default y
  1473. help
  1474. This option preserves the old syscall interface along with the
  1475. new (ARM EABI) one. It also provides a compatibility layer to
  1476. intercept syscalls that have structure arguments which layout
  1477. in memory differs between the legacy ABI and the new ARM EABI
  1478. (only for non "thumb" binaries). This option adds a tiny
  1479. overhead to all syscalls and produces a slightly larger kernel.
  1480. If you know you'll be using only pure EABI user space then you
  1481. can say N here. If this option is not selected and you attempt
  1482. to execute a legacy ABI binary then the result will be
  1483. UNPREDICTABLE (in fact it can be predicted that it won't work
  1484. at all). If in doubt say Y.
  1485. config ARCH_HAS_HOLES_MEMORYMODEL
  1486. bool
  1487. config ARCH_SPARSEMEM_ENABLE
  1488. bool
  1489. config ARCH_SPARSEMEM_DEFAULT
  1490. def_bool ARCH_SPARSEMEM_ENABLE
  1491. config ARCH_SELECT_MEMORY_MODEL
  1492. def_bool ARCH_SPARSEMEM_ENABLE
  1493. config HAVE_ARCH_PFN_VALID
  1494. def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
  1495. config HIGHMEM
  1496. bool "High Memory Support"
  1497. depends on MMU
  1498. help
  1499. The address space of ARM processors is only 4 Gigabytes large
  1500. and it has to accommodate user address space, kernel address
  1501. space as well as some memory mapped IO. That means that, if you
  1502. have a large amount of physical memory and/or IO, not all of the
  1503. memory can be "permanently mapped" by the kernel. The physical
  1504. memory that is not permanently mapped is called "high memory".
  1505. Depending on the selected kernel/user memory split, minimum
  1506. vmalloc space and actual amount of RAM, you may not need this
  1507. option which should result in a slightly faster kernel.
  1508. If unsure, say n.
  1509. config HIGHPTE
  1510. bool "Allocate 2nd-level pagetables from highmem"
  1511. depends on HIGHMEM
  1512. config HW_PERF_EVENTS
  1513. bool "Enable hardware performance counter support for perf events"
  1514. depends on PERF_EVENTS
  1515. default y
  1516. help
  1517. Enable hardware performance counter support for perf events. If
  1518. disabled, perf events will use software events only.
  1519. source "mm/Kconfig"
  1520. config FORCE_MAX_ZONEORDER
  1521. int "Maximum zone order" if ARCH_SHMOBILE
  1522. range 11 64 if ARCH_SHMOBILE
  1523. default "12" if SOC_AM33XX
  1524. default "9" if SA1111
  1525. default "11"
  1526. help
  1527. The kernel memory allocator divides physically contiguous memory
  1528. blocks into "zones", where each zone is a power of two number of
  1529. pages. This option selects the largest power of two that the kernel
  1530. keeps in the memory allocator. If you need to allocate very large
  1531. blocks of physically contiguous memory, then you may need to
  1532. increase this value.
  1533. This config option is actually maximum order plus one. For example,
  1534. a value of 11 means that the largest free memory block is 2^10 pages.
  1535. config ALIGNMENT_TRAP
  1536. bool
  1537. depends on CPU_CP15_MMU
  1538. default y if !ARCH_EBSA110
  1539. select HAVE_PROC_CPU if PROC_FS
  1540. help
  1541. ARM processors cannot fetch/store information which is not
  1542. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  1543. address divisible by 4. On 32-bit ARM processors, these non-aligned
  1544. fetch/store instructions will be emulated in software if you say
  1545. here, which has a severe performance impact. This is necessary for
  1546. correct operation of some network protocols. With an IP-only
  1547. configuration it is safe to say N, otherwise say Y.
  1548. config UACCESS_WITH_MEMCPY
  1549. bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user()"
  1550. depends on MMU
  1551. default y if CPU_FEROCEON
  1552. help
  1553. Implement faster copy_to_user and clear_user methods for CPU
  1554. cores where a 8-word STM instruction give significantly higher
  1555. memory write throughput than a sequence of individual 32bit stores.
  1556. A possible side effect is a slight increase in scheduling latency
  1557. between threads sharing the same address space if they invoke
  1558. such copy operations with large buffers.
  1559. However, if the CPU data cache is using a write-allocate mode,
  1560. this option is unlikely to provide any performance gain.
  1561. config SECCOMP
  1562. bool
  1563. prompt "Enable seccomp to safely compute untrusted bytecode"
  1564. ---help---
  1565. This kernel feature is useful for number crunching applications
  1566. that may need to compute untrusted bytecode during their
  1567. execution. By using pipes or other transports made available to
  1568. the process as file descriptors supporting the read/write
  1569. syscalls, it's possible to isolate those applications in
  1570. their own address space using seccomp. Once seccomp is
  1571. enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
  1572. and the task is only allowed to execute a few safe syscalls
  1573. defined by each seccomp mode.
  1574. config CC_STACKPROTECTOR
  1575. bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
  1576. depends on EXPERIMENTAL
  1577. help
  1578. This option turns on the -fstack-protector GCC feature. This
  1579. feature puts, at the beginning of functions, a canary value on
  1580. the stack just before the return address, and validates
  1581. the value just before actually returning. Stack based buffer
  1582. overflows (that need to overwrite this return address) now also
  1583. overwrite the canary, which gets detected and the attack is then
  1584. neutralized via a kernel panic.
  1585. This feature requires gcc version 4.2 or above.
  1586. config XEN_DOM0
  1587. def_bool y
  1588. depends on XEN
  1589. config XEN
  1590. bool "Xen guest support on ARM (EXPERIMENTAL)"
  1591. depends on EXPERIMENTAL && ARM && OF
  1592. depends on CPU_V7 && !CPU_V6
  1593. help
  1594. Say Y if you want to run Linux in a Virtual Machine on Xen on ARM.
  1595. endmenu
  1596. menu "Boot options"
  1597. config USE_OF
  1598. bool "Flattened Device Tree support"
  1599. select IRQ_DOMAIN
  1600. select OF
  1601. select OF_EARLY_FLATTREE
  1602. help
  1603. Include support for flattened device tree machine descriptions.
  1604. config ATAGS
  1605. bool "Support for the traditional ATAGS boot data passing" if USE_OF
  1606. default y
  1607. help
  1608. This is the traditional way of passing data to the kernel at boot
  1609. time. If you are solely relying on the flattened device tree (or
  1610. the ARM_ATAG_DTB_COMPAT option) then you may unselect this option
  1611. to remove ATAGS support from your kernel binary. If unsure,
  1612. leave this to y.
  1613. config DEPRECATED_PARAM_STRUCT
  1614. bool "Provide old way to pass kernel parameters"
  1615. depends on ATAGS
  1616. help
  1617. This was deprecated in 2001 and announced to live on for 5 years.
  1618. Some old boot loaders still use this way.
  1619. # Compressed boot loader in ROM. Yes, we really want to ask about
  1620. # TEXT and BSS so we preserve their values in the config files.
  1621. config ZBOOT_ROM_TEXT
  1622. hex "Compressed ROM boot loader base address"
  1623. default "0"
  1624. help
  1625. The physical address at which the ROM-able zImage is to be
  1626. placed in the target. Platforms which normally make use of
  1627. ROM-able zImage formats normally set this to a suitable
  1628. value in their defconfig file.
  1629. If ZBOOT_ROM is not enabled, this has no effect.
  1630. config ZBOOT_ROM_BSS
  1631. hex "Compressed ROM boot loader BSS address"
  1632. default "0"
  1633. help
  1634. The base address of an area of read/write memory in the target
  1635. for the ROM-able zImage which must be available while the
  1636. decompressor is running. It must be large enough to hold the
  1637. entire decompressed kernel plus an additional 128 KiB.
  1638. Platforms which normally make use of ROM-able zImage formats
  1639. normally set this to a suitable value in their defconfig file.
  1640. If ZBOOT_ROM is not enabled, this has no effect.
  1641. config ZBOOT_ROM
  1642. bool "Compressed boot loader in ROM/flash"
  1643. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  1644. help
  1645. Say Y here if you intend to execute your compressed kernel image
  1646. (zImage) directly from ROM or flash. If unsure, say N.
  1647. choice
  1648. prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)"
  1649. depends on ZBOOT_ROM && ARCH_SH7372 && EXPERIMENTAL
  1650. default ZBOOT_ROM_NONE
  1651. help
  1652. Include experimental SD/MMC loading code in the ROM-able zImage.
  1653. With this enabled it is possible to write the ROM-able zImage
  1654. kernel image to an MMC or SD card and boot the kernel straight
  1655. from the reset vector. At reset the processor Mask ROM will load
  1656. the first part of the ROM-able zImage which in turn loads the
  1657. rest the kernel image to RAM.
  1658. config ZBOOT_ROM_NONE
  1659. bool "No SD/MMC loader in zImage (EXPERIMENTAL)"
  1660. help
  1661. Do not load image from SD or MMC
  1662. config ZBOOT_ROM_MMCIF
  1663. bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
  1664. help
  1665. Load image from MMCIF hardware block.
  1666. config ZBOOT_ROM_SH_MOBILE_SDHI
  1667. bool "Include SuperH Mobile SDHI loader in zImage (EXPERIMENTAL)"
  1668. help
  1669. Load image from SDHI hardware block
  1670. endchoice
  1671. config ARM_APPENDED_DTB
  1672. bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
  1673. depends on OF && !ZBOOT_ROM && EXPERIMENTAL
  1674. help
  1675. With this option, the boot code will look for a device tree binary
  1676. (DTB) appended to zImage
  1677. (e.g. cat zImage <filename>.dtb > zImage_w_dtb).
  1678. This is meant as a backward compatibility convenience for those
  1679. systems with a bootloader that can't be upgraded to accommodate
  1680. the documented boot protocol using a device tree.
  1681. Beware that there is very little in terms of protection against
  1682. this option being confused by leftover garbage in memory that might
  1683. look like a DTB header after a reboot if no actual DTB is appended
  1684. to zImage. Do not leave this option active in a production kernel
  1685. if you don't intend to always append a DTB. Proper passing of the
  1686. location into r2 of a bootloader provided DTB is always preferable
  1687. to this option.
  1688. config ARM_ATAG_DTB_COMPAT
  1689. bool "Supplement the appended DTB with traditional ATAG information"
  1690. depends on ARM_APPENDED_DTB
  1691. help
  1692. Some old bootloaders can't be updated to a DTB capable one, yet
  1693. they provide ATAGs with memory configuration, the ramdisk address,
  1694. the kernel cmdline string, etc. Such information is dynamically
  1695. provided by the bootloader and can't always be stored in a static
  1696. DTB. To allow a device tree enabled kernel to be used with such
  1697. bootloaders, this option allows zImage to extract the information
  1698. from the ATAG list and store it at run time into the appended DTB.
  1699. choice
  1700. prompt "Kernel command line type" if ARM_ATAG_DTB_COMPAT
  1701. default ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
  1702. config ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
  1703. bool "Use bootloader kernel arguments if available"
  1704. help
  1705. Uses the command-line options passed by the boot loader instead of
  1706. the device tree bootargs property. If the boot loader doesn't provide
  1707. any, the device tree bootargs property will be used.
  1708. config ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEND
  1709. bool "Extend with bootloader kernel arguments"
  1710. help
  1711. The command-line arguments provided by the boot loader will be
  1712. appended to the the device tree bootargs property.
  1713. endchoice
  1714. config CMDLINE
  1715. string "Default kernel command string"
  1716. default ""
  1717. help
  1718. On some architectures (EBSA110 and CATS), there is currently no way
  1719. for the boot loader to pass arguments to the kernel. For these
  1720. architectures, you should supply some command-line options at build
  1721. time by entering them here. As a minimum, you should specify the
  1722. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  1723. choice
  1724. prompt "Kernel command line type" if CMDLINE != ""
  1725. default CMDLINE_FROM_BOOTLOADER
  1726. depends on ATAGS
  1727. config CMDLINE_FROM_BOOTLOADER
  1728. bool "Use bootloader kernel arguments if available"
  1729. help
  1730. Uses the command-line options passed by the boot loader. If
  1731. the boot loader doesn't provide any, the default kernel command
  1732. string provided in CMDLINE will be used.
  1733. config CMDLINE_EXTEND
  1734. bool "Extend bootloader kernel arguments"
  1735. help
  1736. The command-line arguments provided by the boot loader will be
  1737. appended to the default kernel command string.
  1738. config CMDLINE_FORCE
  1739. bool "Always use the default kernel command string"
  1740. help
  1741. Always use the default kernel command string, even if the boot
  1742. loader passes other arguments to the kernel.
  1743. This is useful if you cannot or don't want to change the
  1744. command-line options your boot loader passes to the kernel.
  1745. endchoice
  1746. config XIP_KERNEL
  1747. bool "Kernel Execute-In-Place from ROM"
  1748. depends on !ZBOOT_ROM && !ARM_LPAE && !ARCH_MULTIPLATFORM
  1749. help
  1750. Execute-In-Place allows the kernel to run from non-volatile storage
  1751. directly addressable by the CPU, such as NOR flash. This saves RAM
  1752. space since the text section of the kernel is not loaded from flash
  1753. to RAM. Read-write sections, such as the data section and stack,
  1754. are still copied to RAM. The XIP kernel is not compressed since
  1755. it has to run directly from flash, so it will take more space to
  1756. store it. The flash address used to link the kernel object files,
  1757. and for storing it, is configuration dependent. Therefore, if you
  1758. say Y here, you must know the proper physical address where to
  1759. store the kernel image depending on your own flash memory usage.
  1760. Also note that the make target becomes "make xipImage" rather than
  1761. "make zImage" or "make Image". The final kernel binary to put in
  1762. ROM memory will be arch/arm/boot/xipImage.
  1763. If unsure, say N.
  1764. config XIP_PHYS_ADDR
  1765. hex "XIP Kernel Physical Location"
  1766. depends on XIP_KERNEL
  1767. default "0x00080000"
  1768. help
  1769. This is the physical address in your flash memory the kernel will
  1770. be linked for and stored to. This address is dependent on your
  1771. own flash usage.
  1772. config KEXEC
  1773. bool "Kexec system call (EXPERIMENTAL)"
  1774. depends on EXPERIMENTAL && (!SMP || HOTPLUG_CPU)
  1775. help
  1776. kexec is a system call that implements the ability to shutdown your
  1777. current kernel, and to start another kernel. It is like a reboot
  1778. but it is independent of the system firmware. And like a reboot
  1779. you can start any kernel with it, not just Linux.
  1780. It is an ongoing process to be certain the hardware in a machine
  1781. is properly shutdown, so do not be surprised if this code does not
  1782. initially work for you. It may help to enable device hotplugging
  1783. support.
  1784. config ATAGS_PROC
  1785. bool "Export atags in procfs"
  1786. depends on ATAGS && KEXEC
  1787. default y
  1788. help
  1789. Should the atags used to boot the kernel be exported in an "atags"
  1790. file in procfs. Useful with kexec.
  1791. config CRASH_DUMP
  1792. bool "Build kdump crash kernel (EXPERIMENTAL)"
  1793. depends on EXPERIMENTAL
  1794. help
  1795. Generate crash dump after being started by kexec. This should
  1796. be normally only set in special crash dump kernels which are
  1797. loaded in the main kernel with kexec-tools into a specially
  1798. reserved region and then later executed after a crash by
  1799. kdump/kexec. The crash dump kernel must be compiled to a
  1800. memory address not used by the main kernel
  1801. For more details see Documentation/kdump/kdump.txt
  1802. config AUTO_ZRELADDR
  1803. bool "Auto calculation of the decompressed kernel image address"
  1804. depends on !ZBOOT_ROM && !ARCH_U300
  1805. help
  1806. ZRELADDR is the physical address where the decompressed kernel
  1807. image will be placed. If AUTO_ZRELADDR is selected, the address
  1808. will be determined at run-time by masking the current IP with
  1809. 0xf8000000. This assumes the zImage being placed in the first 128MB
  1810. from start of memory.
  1811. endmenu
  1812. menu "CPU Power Management"
  1813. if ARCH_HAS_CPUFREQ
  1814. source "drivers/cpufreq/Kconfig"
  1815. config CPU_FREQ_IMX
  1816. tristate "CPUfreq driver for i.MX CPUs"
  1817. depends on ARCH_MXC && CPU_FREQ
  1818. select CPU_FREQ_TABLE
  1819. help
  1820. This enables the CPUfreq driver for i.MX CPUs.
  1821. config CPU_FREQ_SA1100
  1822. bool
  1823. config CPU_FREQ_SA1110
  1824. bool
  1825. config CPU_FREQ_INTEGRATOR
  1826. tristate "CPUfreq driver for ARM Integrator CPUs"
  1827. depends on ARCH_INTEGRATOR && CPU_FREQ
  1828. default y
  1829. help
  1830. This enables the CPUfreq driver for ARM Integrator CPUs.
  1831. For details, take a look at <file:Documentation/cpu-freq>.
  1832. If in doubt, say Y.
  1833. config CPU_FREQ_PXA
  1834. bool
  1835. depends on CPU_FREQ && ARCH_PXA && PXA25x
  1836. default y
  1837. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  1838. select CPU_FREQ_TABLE
  1839. config CPU_FREQ_S3C
  1840. bool
  1841. help
  1842. Internal configuration node for common cpufreq on Samsung SoC
  1843. config CPU_FREQ_S3C24XX
  1844. bool "CPUfreq driver for Samsung S3C24XX series CPUs (EXPERIMENTAL)"
  1845. depends on ARCH_S3C24XX && CPU_FREQ && EXPERIMENTAL
  1846. select CPU_FREQ_S3C
  1847. help
  1848. This enables the CPUfreq driver for the Samsung S3C24XX family
  1849. of CPUs.
  1850. For details, take a look at <file:Documentation/cpu-freq>.
  1851. If in doubt, say N.
  1852. config CPU_FREQ_S3C24XX_PLL
  1853. bool "Support CPUfreq changing of PLL frequency (EXPERIMENTAL)"
  1854. depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
  1855. help
  1856. Compile in support for changing the PLL frequency from the
  1857. S3C24XX series CPUfreq driver. The PLL takes time to settle
  1858. after a frequency change, so by default it is not enabled.
  1859. This also means that the PLL tables for the selected CPU(s) will
  1860. be built which may increase the size of the kernel image.
  1861. config CPU_FREQ_S3C24XX_DEBUG
  1862. bool "Debug CPUfreq Samsung driver core"
  1863. depends on CPU_FREQ_S3C24XX
  1864. help
  1865. Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
  1866. config CPU_FREQ_S3C24XX_IODEBUG
  1867. bool "Debug CPUfreq Samsung driver IO timing"
  1868. depends on CPU_FREQ_S3C24XX
  1869. help
  1870. Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
  1871. config CPU_FREQ_S3C24XX_DEBUGFS
  1872. bool "Export debugfs for CPUFreq"
  1873. depends on CPU_FREQ_S3C24XX && DEBUG_FS
  1874. help
  1875. Export status information via debugfs.
  1876. endif
  1877. source "drivers/cpuidle/Kconfig"
  1878. endmenu
  1879. menu "Floating point emulation"
  1880. comment "At least one emulation must be selected"
  1881. config FPE_NWFPE
  1882. bool "NWFPE math emulation"
  1883. depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
  1884. ---help---
  1885. Say Y to include the NWFPE floating point emulator in the kernel.
  1886. This is necessary to run most binaries. Linux does not currently
  1887. support floating point hardware so you need to say Y here even if
  1888. your machine has an FPA or floating point co-processor podule.
  1889. You may say N here if you are going to load the Acorn FPEmulator
  1890. early in the bootup.
  1891. config FPE_NWFPE_XP
  1892. bool "Support extended precision"
  1893. depends on FPE_NWFPE
  1894. help
  1895. Say Y to include 80-bit support in the kernel floating-point
  1896. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  1897. Note that gcc does not generate 80-bit operations by default,
  1898. so in most cases this option only enlarges the size of the
  1899. floating point emulator without any good reason.
  1900. You almost surely want to say N here.
  1901. config FPE_FASTFPE
  1902. bool "FastFPE math emulation (EXPERIMENTAL)"
  1903. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  1904. ---help---
  1905. Say Y here to include the FAST floating point emulator in the kernel.
  1906. This is an experimental much faster emulator which now also has full
  1907. precision for the mantissa. It does not support any exceptions.
  1908. It is very simple, and approximately 3-6 times faster than NWFPE.
  1909. It should be sufficient for most programs. It may be not suitable
  1910. for scientific calculations, but you have to check this for yourself.
  1911. If you do not feel you need a faster FP emulation you should better
  1912. choose NWFPE.
  1913. config VFP
  1914. bool "VFP-format floating point maths"
  1915. depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  1916. help
  1917. Say Y to include VFP support code in the kernel. This is needed
  1918. if your hardware includes a VFP unit.
  1919. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  1920. release notes and additional status information.
  1921. Say N if your target does not have VFP hardware.
  1922. config VFPv3
  1923. bool
  1924. depends on VFP
  1925. default y if CPU_V7
  1926. config NEON
  1927. bool "Advanced SIMD (NEON) Extension support"
  1928. depends on VFPv3 && CPU_V7
  1929. help
  1930. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  1931. Extension.
  1932. endmenu
  1933. menu "Userspace binary formats"
  1934. source "fs/Kconfig.binfmt"
  1935. config ARTHUR
  1936. tristate "RISC OS personality"
  1937. depends on !AEABI
  1938. help
  1939. Say Y here to include the kernel code necessary if you want to run
  1940. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  1941. experimental; if this sounds frightening, say N and sleep in peace.
  1942. You can also say M here to compile this support as a module (which
  1943. will be called arthur).
  1944. endmenu
  1945. menu "Power management options"
  1946. source "kernel/power/Kconfig"
  1947. config ARCH_SUSPEND_POSSIBLE
  1948. depends on !ARCH_S5PC100
  1949. depends on CPU_ARM920T || CPU_ARM926T || CPU_SA1100 || \
  1950. CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE || CPU_MOHAWK
  1951. def_bool y
  1952. config ARM_CPU_SUSPEND
  1953. def_bool PM_SLEEP
  1954. endmenu
  1955. source "net/Kconfig"
  1956. source "drivers/Kconfig"
  1957. source "fs/Kconfig"
  1958. source "arch/arm/Kconfig.debug"
  1959. source "security/Kconfig"
  1960. source "crypto/Kconfig"
  1961. source "lib/Kconfig"