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 BUILDTIME_EXTABLE_SORT if MMU
  9. select CPU_PM if (SUSPEND || CPU_IDLE)
  10. select DCACHE_WORD_ACCESS if (CPU_V6 || CPU_V6K || CPU_V7) && !CPU_BIG_ENDIAN && MMU
  11. select GENERIC_ATOMIC64 if (CPU_V6 || !CPU_32v6K || !AEABI)
  12. select GENERIC_CLOCKEVENTS_BROADCAST if SMP
  13. select GENERIC_IRQ_PROBE
  14. select GENERIC_IRQ_SHOW
  15. select GENERIC_KERNEL_THREAD
  16. select GENERIC_KERNEL_EXECVE
  17. select GENERIC_PCI_IOMAP
  18. select GENERIC_SMP_IDLE_THREAD
  19. select GENERIC_STRNCPY_FROM_USER
  20. select GENERIC_STRNLEN_USER
  21. select HARDIRQS_SW_RESEND
  22. select HAVE_AOUT
  23. select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL
  24. select HAVE_ARCH_KGDB
  25. select HAVE_ARCH_SECCOMP_FILTER
  26. select HAVE_ARCH_TRACEHOOK
  27. select HAVE_BPF_JIT
  28. select HAVE_C_RECORDMCOUNT
  29. select HAVE_DEBUG_KMEMLEAK
  30. select HAVE_DMA_API_DEBUG
  31. select HAVE_DMA_ATTRS
  32. select HAVE_DMA_CONTIGUOUS if MMU
  33. select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL)
  34. select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
  35. select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL)
  36. select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
  37. select HAVE_GENERIC_DMA_COHERENT
  38. select HAVE_GENERIC_HARDIRQS
  39. select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7))
  40. select HAVE_IDE if PCI || ISA || PCMCIA
  41. select HAVE_IRQ_WORK
  42. select HAVE_KERNEL_GZIP
  43. select HAVE_KERNEL_LZMA
  44. select HAVE_KERNEL_LZO
  45. select HAVE_KERNEL_XZ
  46. select HAVE_KPROBES if !XIP_KERNEL
  47. select HAVE_KRETPROBES if (HAVE_KPROBES)
  48. select HAVE_MEMBLOCK
  49. select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
  50. select HAVE_PERF_EVENTS
  51. select HAVE_REGS_AND_STACK_ACCESS_API
  52. select HAVE_SYSCALL_TRACEPOINTS
  53. select HAVE_UID16
  54. select KTIME_SCALAR
  55. select PERF_USE_VMALLOC
  56. select RTC_LIB
  57. select SYS_SUPPORTS_APM_EMULATION
  58. select HAVE_MOD_ARCH_SPECIFIC if ARM_UNWIND
  59. select MODULES_USE_ELF_REL
  60. select CLONE_BACKWARDS
  61. help
  62. The ARM series is a line of low-power-consumption RISC chip designs
  63. licensed by ARM Ltd and targeted at embedded applications and
  64. handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
  65. manufactured, but legacy ARM-based PC hardware remains popular in
  66. Europe. There is an ARM Linux project with a web page at
  67. <http://www.arm.linux.org.uk/>.
  68. config ARM_HAS_SG_CHAIN
  69. bool
  70. config NEED_SG_DMA_LENGTH
  71. bool
  72. config ARM_DMA_USE_IOMMU
  73. bool
  74. select ARM_HAS_SG_CHAIN
  75. select NEED_SG_DMA_LENGTH
  76. config HAVE_PWM
  77. bool
  78. config MIGHT_HAVE_PCI
  79. bool
  80. config SYS_SUPPORTS_APM_EMULATION
  81. bool
  82. config GENERIC_GPIO
  83. bool
  84. config HAVE_TCM
  85. bool
  86. select GENERIC_ALLOCATOR
  87. config HAVE_PROC_CPU
  88. bool
  89. config NO_IOPORT
  90. bool
  91. config EISA
  92. bool
  93. ---help---
  94. The Extended Industry Standard Architecture (EISA) bus was
  95. developed as an open alternative to the IBM MicroChannel bus.
  96. The EISA bus provided some of the features of the IBM MicroChannel
  97. bus while maintaining backward compatibility with cards made for
  98. the older ISA bus. The EISA bus saw limited use between 1988 and
  99. 1995 when it was made obsolete by the PCI bus.
  100. Say Y here if you are building a kernel for an EISA-based machine.
  101. Otherwise, say N.
  102. config SBUS
  103. bool
  104. config STACKTRACE_SUPPORT
  105. bool
  106. default y
  107. config HAVE_LATENCYTOP_SUPPORT
  108. bool
  109. depends on !SMP
  110. default y
  111. config LOCKDEP_SUPPORT
  112. bool
  113. default y
  114. config TRACE_IRQFLAGS_SUPPORT
  115. bool
  116. default y
  117. config RWSEM_GENERIC_SPINLOCK
  118. bool
  119. default y
  120. config RWSEM_XCHGADD_ALGORITHM
  121. bool
  122. config ARCH_HAS_ILOG2_U32
  123. bool
  124. config ARCH_HAS_ILOG2_U64
  125. bool
  126. config ARCH_HAS_CPUFREQ
  127. bool
  128. help
  129. Internal node to signify that the ARCH has CPUFREQ support
  130. and that the relevant menu configurations are displayed for
  131. it.
  132. config GENERIC_HWEIGHT
  133. bool
  134. default y
  135. config GENERIC_CALIBRATE_DELAY
  136. bool
  137. default y
  138. config ARCH_MAY_HAVE_PC_FDC
  139. bool
  140. config ZONE_DMA
  141. bool
  142. config NEED_DMA_MAP_STATE
  143. def_bool y
  144. config ARCH_HAS_DMA_SET_COHERENT_MASK
  145. bool
  146. config GENERIC_ISA_DMA
  147. bool
  148. config FIQ
  149. bool
  150. config NEED_RET_TO_USER
  151. bool
  152. config ARCH_MTD_XIP
  153. bool
  154. config VECTORS_BASE
  155. hex
  156. default 0xffff0000 if MMU || CPU_HIGH_VECTOR
  157. default DRAM_BASE if REMAP_VECTORS_TO_RAM
  158. default 0x00000000
  159. help
  160. The base address of exception vectors.
  161. config ARM_PATCH_PHYS_VIRT
  162. bool "Patch physical to virtual translations at runtime" if EMBEDDED
  163. default y
  164. depends on !XIP_KERNEL && MMU
  165. depends on !ARCH_REALVIEW || !SPARSEMEM
  166. help
  167. Patch phys-to-virt and virt-to-phys translation functions at
  168. boot and module load time according to the position of the
  169. kernel in system memory.
  170. This can only be used with non-XIP MMU kernels where the base
  171. of physical memory is at a 16MB boundary.
  172. Only disable this option if you know that you do not require
  173. this feature (eg, building a kernel for a single machine) and
  174. you need to shrink the kernel to the minimal size.
  175. config NEED_MACH_GPIO_H
  176. bool
  177. help
  178. Select this when mach/gpio.h is required to provide special
  179. definitions for this platform. The need for mach/gpio.h should
  180. be avoided when possible.
  181. config NEED_MACH_IO_H
  182. bool
  183. help
  184. Select this when mach/io.h is required to provide special
  185. definitions for this platform. The need for mach/io.h should
  186. be avoided when possible.
  187. config NEED_MACH_MEMORY_H
  188. bool
  189. help
  190. Select this when mach/memory.h is required to provide special
  191. definitions for this platform. The need for mach/memory.h should
  192. be avoided when possible.
  193. config PHYS_OFFSET
  194. hex "Physical address of main memory" if MMU
  195. depends on !ARM_PATCH_PHYS_VIRT && !NEED_MACH_MEMORY_H
  196. default DRAM_BASE if !MMU
  197. help
  198. Please provide the physical address corresponding to the
  199. location of main memory in your system.
  200. config GENERIC_BUG
  201. def_bool y
  202. depends on BUG
  203. source "init/Kconfig"
  204. source "kernel/Kconfig.freezer"
  205. menu "System Type"
  206. config MMU
  207. bool "MMU-based Paged Memory Management Support"
  208. default y
  209. help
  210. Select if you want MMU-based virtualised addressing space
  211. support by paged memory management. If unsure, say 'Y'.
  212. #
  213. # The "ARM system type" choice list is ordered alphabetically by option
  214. # text. Please add new entries in the option alphabetic order.
  215. #
  216. choice
  217. prompt "ARM system type"
  218. default ARCH_MULTIPLATFORM
  219. config ARCH_MULTIPLATFORM
  220. bool "Allow multiple platforms to be selected"
  221. depends on MMU
  222. select ARM_PATCH_PHYS_VIRT
  223. select AUTO_ZRELADDR
  224. select COMMON_CLK
  225. select MULTI_IRQ_HANDLER
  226. select SPARSE_IRQ
  227. select USE_OF
  228. config ARCH_INTEGRATOR
  229. bool "ARM Ltd. Integrator family"
  230. select ARCH_HAS_CPUFREQ
  231. select ARM_AMBA
  232. select COMMON_CLK
  233. select COMMON_CLK_VERSATILE
  234. select GENERIC_CLOCKEVENTS
  235. select HAVE_TCM
  236. select ICST
  237. select MULTI_IRQ_HANDLER
  238. select NEED_MACH_MEMORY_H
  239. select PLAT_VERSATILE
  240. select SPARSE_IRQ
  241. select VERSATILE_FPGA_IRQ
  242. help
  243. Support for ARM's Integrator platform.
  244. config ARCH_REALVIEW
  245. bool "ARM Ltd. RealView family"
  246. select ARCH_WANT_OPTIONAL_GPIOLIB
  247. select ARM_AMBA
  248. select ARM_TIMER_SP804
  249. select COMMON_CLK
  250. select COMMON_CLK_VERSATILE
  251. select GENERIC_CLOCKEVENTS
  252. select GPIO_PL061 if GPIOLIB
  253. select ICST
  254. select NEED_MACH_MEMORY_H
  255. select PLAT_VERSATILE
  256. select PLAT_VERSATILE_CLCD
  257. help
  258. This enables support for ARM Ltd RealView boards.
  259. config ARCH_VERSATILE
  260. bool "ARM Ltd. Versatile family"
  261. select ARCH_WANT_OPTIONAL_GPIOLIB
  262. select ARM_AMBA
  263. select ARM_TIMER_SP804
  264. select ARM_VIC
  265. select CLKDEV_LOOKUP
  266. select GENERIC_CLOCKEVENTS
  267. select HAVE_MACH_CLKDEV
  268. select ICST
  269. select PLAT_VERSATILE
  270. select PLAT_VERSATILE_CLCD
  271. select PLAT_VERSATILE_CLOCK
  272. select VERSATILE_FPGA_IRQ
  273. help
  274. This enables support for ARM Ltd Versatile board.
  275. config ARCH_AT91
  276. bool "Atmel AT91"
  277. select ARCH_REQUIRE_GPIOLIB
  278. select CLKDEV_LOOKUP
  279. select HAVE_CLK
  280. select IRQ_DOMAIN
  281. select NEED_MACH_GPIO_H
  282. select NEED_MACH_IO_H if PCCARD
  283. select PINCTRL
  284. select PINCTRL_AT91 if USE_OF
  285. help
  286. This enables support for systems based on Atmel
  287. AT91RM9200 and AT91SAM9* processors.
  288. config ARCH_BCM2835
  289. bool "Broadcom BCM2835 family"
  290. select ARCH_REQUIRE_GPIOLIB
  291. select ARM_AMBA
  292. select ARM_ERRATA_411920
  293. select ARM_TIMER_SP804
  294. select CLKDEV_LOOKUP
  295. select COMMON_CLK
  296. select CPU_V6
  297. select GENERIC_CLOCKEVENTS
  298. select GENERIC_GPIO
  299. select MULTI_IRQ_HANDLER
  300. select PINCTRL
  301. select PINCTRL_BCM2835
  302. select SPARSE_IRQ
  303. select USE_OF
  304. help
  305. This enables support for the Broadcom BCM2835 SoC. This SoC is
  306. use in the Raspberry Pi, and Roku 2 devices.
  307. config ARCH_CNS3XXX
  308. bool "Cavium Networks CNS3XXX family"
  309. select ARM_GIC
  310. select CPU_V6K
  311. select GENERIC_CLOCKEVENTS
  312. select MIGHT_HAVE_CACHE_L2X0
  313. select MIGHT_HAVE_PCI
  314. select PCI_DOMAINS if PCI
  315. help
  316. Support for Cavium Networks CNS3XXX platform.
  317. config ARCH_CLPS711X
  318. bool "Cirrus Logic CLPS711x/EP721x/EP731x-based"
  319. select ARCH_REQUIRE_GPIOLIB
  320. select ARCH_USES_GETTIMEOFFSET
  321. select AUTO_ZRELADDR
  322. select CLKDEV_LOOKUP
  323. select COMMON_CLK
  324. select CPU_ARM720T
  325. select GENERIC_CLOCKEVENTS
  326. select MULTI_IRQ_HANDLER
  327. select NEED_MACH_MEMORY_H
  328. select SPARSE_IRQ
  329. help
  330. Support for Cirrus Logic 711x/721x/731x based boards.
  331. config ARCH_GEMINI
  332. bool "Cortina Systems Gemini"
  333. select ARCH_REQUIRE_GPIOLIB
  334. select ARCH_USES_GETTIMEOFFSET
  335. select CPU_FA526
  336. help
  337. Support for the Cortina Systems Gemini family SoCs
  338. config ARCH_SIRF
  339. bool "CSR SiRF"
  340. select ARCH_REQUIRE_GPIOLIB
  341. select COMMON_CLK
  342. select GENERIC_CLOCKEVENTS
  343. select GENERIC_IRQ_CHIP
  344. select MIGHT_HAVE_CACHE_L2X0
  345. select NO_IOPORT
  346. select PINCTRL
  347. select PINCTRL_SIRF
  348. select USE_OF
  349. help
  350. Support for CSR SiRFprimaII/Marco/Polo platforms
  351. config ARCH_EBSA110
  352. bool "EBSA-110"
  353. select ARCH_USES_GETTIMEOFFSET
  354. select CPU_SA110
  355. select ISA
  356. select NEED_MACH_IO_H
  357. select NEED_MACH_MEMORY_H
  358. select NO_IOPORT
  359. help
  360. This is an evaluation board for the StrongARM processor available
  361. from Digital. It has limited hardware on-board, including an
  362. Ethernet interface, two PCMCIA sockets, two serial ports and a
  363. parallel port.
  364. config ARCH_EP93XX
  365. bool "EP93xx-based"
  366. select ARCH_HAS_HOLES_MEMORYMODEL
  367. select ARCH_REQUIRE_GPIOLIB
  368. select ARCH_USES_GETTIMEOFFSET
  369. select ARM_AMBA
  370. select ARM_VIC
  371. select CLKDEV_LOOKUP
  372. select CPU_ARM920T
  373. select NEED_MACH_MEMORY_H
  374. help
  375. This enables support for the Cirrus EP93xx series of CPUs.
  376. config ARCH_FOOTBRIDGE
  377. bool "FootBridge"
  378. select CPU_SA110
  379. select FOOTBRIDGE
  380. select GENERIC_CLOCKEVENTS
  381. select HAVE_IDE
  382. select NEED_MACH_IO_H if !MMU
  383. select NEED_MACH_MEMORY_H
  384. help
  385. Support for systems based on the DC21285 companion chip
  386. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  387. config ARCH_MXS
  388. bool "Freescale MXS-based"
  389. select ARCH_REQUIRE_GPIOLIB
  390. select CLKDEV_LOOKUP
  391. select CLKSRC_MMIO
  392. select COMMON_CLK
  393. select GENERIC_CLOCKEVENTS
  394. select HAVE_CLK_PREPARE
  395. select MULTI_IRQ_HANDLER
  396. select PINCTRL
  397. select SPARSE_IRQ
  398. select USE_OF
  399. help
  400. Support for Freescale MXS-based family of processors
  401. config ARCH_NETX
  402. bool "Hilscher NetX based"
  403. select ARM_VIC
  404. select CLKSRC_MMIO
  405. select CPU_ARM926T
  406. select GENERIC_CLOCKEVENTS
  407. help
  408. This enables support for systems based on the Hilscher NetX Soc
  409. config ARCH_H720X
  410. bool "Hynix HMS720x-based"
  411. select ARCH_USES_GETTIMEOFFSET
  412. select CPU_ARM720T
  413. select ISA_DMA_API
  414. help
  415. This enables support for systems based on the Hynix HMS720x
  416. config ARCH_IOP13XX
  417. bool "IOP13xx-based"
  418. depends on MMU
  419. select ARCH_SUPPORTS_MSI
  420. select CPU_XSC3
  421. select NEED_MACH_MEMORY_H
  422. select NEED_RET_TO_USER
  423. select PCI
  424. select PLAT_IOP
  425. select VMSPLIT_1G
  426. help
  427. Support for Intel's IOP13XX (XScale) family of processors.
  428. config ARCH_IOP32X
  429. bool "IOP32x-based"
  430. depends on MMU
  431. select ARCH_REQUIRE_GPIOLIB
  432. select CPU_XSCALE
  433. select NEED_MACH_GPIO_H
  434. select NEED_RET_TO_USER
  435. select PCI
  436. select PLAT_IOP
  437. help
  438. Support for Intel's 80219 and IOP32X (XScale) family of
  439. processors.
  440. config ARCH_IOP33X
  441. bool "IOP33x-based"
  442. depends on MMU
  443. select ARCH_REQUIRE_GPIOLIB
  444. select CPU_XSCALE
  445. select NEED_MACH_GPIO_H
  446. select NEED_RET_TO_USER
  447. select PCI
  448. select PLAT_IOP
  449. help
  450. Support for Intel's IOP33X (XScale) family of processors.
  451. config ARCH_IXP4XX
  452. bool "IXP4xx-based"
  453. depends on MMU
  454. select ARCH_HAS_DMA_SET_COHERENT_MASK
  455. select ARCH_REQUIRE_GPIOLIB
  456. select CLKSRC_MMIO
  457. select CPU_XSCALE
  458. select DMABOUNCE if PCI
  459. select GENERIC_CLOCKEVENTS
  460. select MIGHT_HAVE_PCI
  461. select NEED_MACH_IO_H
  462. help
  463. Support for Intel's IXP4XX (XScale) family of processors.
  464. config ARCH_DOVE
  465. bool "Marvell Dove"
  466. select ARCH_REQUIRE_GPIOLIB
  467. select COMMON_CLK_DOVE
  468. select CPU_V7
  469. select GENERIC_CLOCKEVENTS
  470. select MIGHT_HAVE_PCI
  471. select PINCTRL
  472. select PINCTRL_DOVE
  473. select PLAT_ORION_LEGACY
  474. select USB_ARCH_HAS_EHCI
  475. help
  476. Support for the Marvell Dove SoC 88AP510
  477. config ARCH_KIRKWOOD
  478. bool "Marvell Kirkwood"
  479. select ARCH_REQUIRE_GPIOLIB
  480. select CPU_FEROCEON
  481. select GENERIC_CLOCKEVENTS
  482. select PCI
  483. select PCI_QUIRKS
  484. select PINCTRL
  485. select PINCTRL_KIRKWOOD
  486. select PLAT_ORION_LEGACY
  487. help
  488. Support for the following Marvell Kirkwood series SoCs:
  489. 88F6180, 88F6192 and 88F6281.
  490. config ARCH_MV78XX0
  491. bool "Marvell MV78xx0"
  492. select ARCH_REQUIRE_GPIOLIB
  493. select CPU_FEROCEON
  494. select GENERIC_CLOCKEVENTS
  495. select PCI
  496. select PLAT_ORION_LEGACY
  497. help
  498. Support for the following Marvell MV78xx0 series SoCs:
  499. MV781x0, MV782x0.
  500. config ARCH_ORION5X
  501. bool "Marvell Orion"
  502. depends on MMU
  503. select ARCH_REQUIRE_GPIOLIB
  504. select CPU_FEROCEON
  505. select GENERIC_CLOCKEVENTS
  506. select PCI
  507. select PLAT_ORION_LEGACY
  508. help
  509. Support for the following Marvell Orion 5x series SoCs:
  510. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  511. Orion-2 (5281), Orion-1-90 (6183).
  512. config ARCH_MMP
  513. bool "Marvell PXA168/910/MMP2"
  514. depends on MMU
  515. select ARCH_REQUIRE_GPIOLIB
  516. select CLKDEV_LOOKUP
  517. select GENERIC_ALLOCATOR
  518. select GENERIC_CLOCKEVENTS
  519. select GPIO_PXA
  520. select IRQ_DOMAIN
  521. select NEED_MACH_GPIO_H
  522. select PINCTRL
  523. select PLAT_PXA
  524. select SPARSE_IRQ
  525. help
  526. Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
  527. config ARCH_KS8695
  528. bool "Micrel/Kendin KS8695"
  529. select ARCH_REQUIRE_GPIOLIB
  530. select CLKSRC_MMIO
  531. select CPU_ARM922T
  532. select GENERIC_CLOCKEVENTS
  533. select NEED_MACH_MEMORY_H
  534. help
  535. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  536. System-on-Chip devices.
  537. config ARCH_W90X900
  538. bool "Nuvoton W90X900 CPU"
  539. select ARCH_REQUIRE_GPIOLIB
  540. select CLKDEV_LOOKUP
  541. select CLKSRC_MMIO
  542. select CPU_ARM926T
  543. select GENERIC_CLOCKEVENTS
  544. help
  545. Support for Nuvoton (Winbond logic dept.) ARM9 processor,
  546. At present, the w90x900 has been renamed nuc900, regarding
  547. the ARM series product line, you can login the following
  548. link address to know more.
  549. <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
  550. ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
  551. config ARCH_LPC32XX
  552. bool "NXP LPC32XX"
  553. select ARCH_REQUIRE_GPIOLIB
  554. select ARM_AMBA
  555. select CLKDEV_LOOKUP
  556. select CLKSRC_MMIO
  557. select CPU_ARM926T
  558. select GENERIC_CLOCKEVENTS
  559. select HAVE_IDE
  560. select HAVE_PWM
  561. select USB_ARCH_HAS_OHCI
  562. select USE_OF
  563. help
  564. Support for the NXP LPC32XX family of processors
  565. config ARCH_TEGRA
  566. bool "NVIDIA Tegra"
  567. select ARCH_HAS_CPUFREQ
  568. select CLKDEV_LOOKUP
  569. select CLKSRC_MMIO
  570. select COMMON_CLK
  571. select GENERIC_CLOCKEVENTS
  572. select GENERIC_GPIO
  573. select HAVE_CLK
  574. select HAVE_SMP
  575. select MIGHT_HAVE_CACHE_L2X0
  576. select SPARSE_IRQ
  577. select USE_OF
  578. help
  579. This enables support for NVIDIA Tegra based systems (Tegra APX,
  580. Tegra 6xx and Tegra 2 series).
  581. config ARCH_PXA
  582. bool "PXA2xx/PXA3xx-based"
  583. depends on MMU
  584. select ARCH_HAS_CPUFREQ
  585. select ARCH_MTD_XIP
  586. select ARCH_REQUIRE_GPIOLIB
  587. select ARM_CPU_SUSPEND if PM
  588. select AUTO_ZRELADDR
  589. select CLKDEV_LOOKUP
  590. select CLKSRC_MMIO
  591. select GENERIC_CLOCKEVENTS
  592. select GPIO_PXA
  593. select HAVE_IDE
  594. select MULTI_IRQ_HANDLER
  595. select NEED_MACH_GPIO_H
  596. select PLAT_PXA
  597. select SPARSE_IRQ
  598. help
  599. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  600. config ARCH_MSM
  601. bool "Qualcomm MSM"
  602. select ARCH_REQUIRE_GPIOLIB
  603. select CLKDEV_LOOKUP
  604. select GENERIC_CLOCKEVENTS
  605. select HAVE_CLK
  606. help
  607. Support for Qualcomm MSM/QSD based systems. This runs on the
  608. apps processor of the MSM/QSD and depends on a shared memory
  609. interface to the modem processor which runs the baseband
  610. stack and controls some vital subsystems
  611. (clock and power control, etc).
  612. config ARCH_SHMOBILE
  613. bool "Renesas SH-Mobile / R-Mobile"
  614. select CLKDEV_LOOKUP
  615. select GENERIC_CLOCKEVENTS
  616. select HAVE_CLK
  617. select HAVE_MACH_CLKDEV
  618. select HAVE_SMP
  619. select MIGHT_HAVE_CACHE_L2X0
  620. select MULTI_IRQ_HANDLER
  621. select NEED_MACH_MEMORY_H
  622. select NO_IOPORT
  623. select PM_GENERIC_DOMAINS if PM
  624. select SPARSE_IRQ
  625. help
  626. Support for Renesas's SH-Mobile and R-Mobile ARM platforms.
  627. config ARCH_RPC
  628. bool "RiscPC"
  629. select ARCH_ACORN
  630. select ARCH_MAY_HAVE_PC_FDC
  631. select ARCH_SPARSEMEM_ENABLE
  632. select ARCH_USES_GETTIMEOFFSET
  633. select FIQ
  634. select HAVE_IDE
  635. select HAVE_PATA_PLATFORM
  636. select ISA_DMA_API
  637. select NEED_MACH_IO_H
  638. select NEED_MACH_MEMORY_H
  639. select NO_IOPORT
  640. help
  641. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  642. CD-ROM interface, serial and parallel port, and the floppy drive.
  643. config ARCH_SA1100
  644. bool "SA1100-based"
  645. select ARCH_HAS_CPUFREQ
  646. select ARCH_MTD_XIP
  647. select ARCH_REQUIRE_GPIOLIB
  648. select ARCH_SPARSEMEM_ENABLE
  649. select CLKDEV_LOOKUP
  650. select CLKSRC_MMIO
  651. select CPU_FREQ
  652. select CPU_SA1100
  653. select GENERIC_CLOCKEVENTS
  654. select HAVE_IDE
  655. select ISA
  656. select NEED_MACH_GPIO_H
  657. select NEED_MACH_MEMORY_H
  658. select SPARSE_IRQ
  659. help
  660. Support for StrongARM 11x0 based boards.
  661. config ARCH_S3C24XX
  662. bool "Samsung S3C24XX SoCs"
  663. select ARCH_HAS_CPUFREQ
  664. select ARCH_USES_GETTIMEOFFSET
  665. select CLKDEV_LOOKUP
  666. select GENERIC_GPIO
  667. select HAVE_CLK
  668. select HAVE_S3C2410_I2C if I2C
  669. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  670. select HAVE_S3C_RTC if RTC_CLASS
  671. select NEED_MACH_GPIO_H
  672. select NEED_MACH_IO_H
  673. help
  674. Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443
  675. and S3C2450 SoCs based systems, such as the Simtec Electronics BAST
  676. (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or the
  677. Samsung SMDK2410 development board (and derivatives).
  678. config ARCH_S3C64XX
  679. bool "Samsung S3C64XX"
  680. select ARCH_HAS_CPUFREQ
  681. select ARCH_REQUIRE_GPIOLIB
  682. select ARCH_USES_GETTIMEOFFSET
  683. select ARM_VIC
  684. select CLKDEV_LOOKUP
  685. select CPU_V6
  686. select HAVE_CLK
  687. select HAVE_S3C2410_I2C if I2C
  688. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  689. select HAVE_TCM
  690. select NEED_MACH_GPIO_H
  691. select NO_IOPORT
  692. select PLAT_SAMSUNG
  693. select S3C_DEV_NAND
  694. select S3C_GPIO_TRACK
  695. select SAMSUNG_CLKSRC
  696. select SAMSUNG_GPIOLIB_4BIT
  697. select SAMSUNG_IRQ_VIC_TIMER
  698. select USB_ARCH_HAS_OHCI
  699. help
  700. Samsung S3C64XX series based systems
  701. config ARCH_S5P64X0
  702. bool "Samsung S5P6440 S5P6450"
  703. select CLKDEV_LOOKUP
  704. select CLKSRC_MMIO
  705. select CPU_V6
  706. select GENERIC_CLOCKEVENTS
  707. select GENERIC_GPIO
  708. select HAVE_CLK
  709. select HAVE_S3C2410_I2C if I2C
  710. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  711. select HAVE_S3C_RTC if RTC_CLASS
  712. select NEED_MACH_GPIO_H
  713. help
  714. Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
  715. SMDK6450.
  716. config ARCH_S5PC100
  717. bool "Samsung S5PC100"
  718. select ARCH_USES_GETTIMEOFFSET
  719. select CLKDEV_LOOKUP
  720. select CPU_V7
  721. select GENERIC_GPIO
  722. select HAVE_CLK
  723. select HAVE_S3C2410_I2C if I2C
  724. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  725. select HAVE_S3C_RTC if RTC_CLASS
  726. select NEED_MACH_GPIO_H
  727. help
  728. Samsung S5PC100 series based systems
  729. config ARCH_S5PV210
  730. bool "Samsung S5PV210/S5PC110"
  731. select ARCH_HAS_CPUFREQ
  732. select ARCH_HAS_HOLES_MEMORYMODEL
  733. select ARCH_SPARSEMEM_ENABLE
  734. select CLKDEV_LOOKUP
  735. select CLKSRC_MMIO
  736. select CPU_V7
  737. select GENERIC_CLOCKEVENTS
  738. select GENERIC_GPIO
  739. select HAVE_CLK
  740. select HAVE_S3C2410_I2C if I2C
  741. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  742. select HAVE_S3C_RTC if RTC_CLASS
  743. select NEED_MACH_GPIO_H
  744. select NEED_MACH_MEMORY_H
  745. help
  746. Samsung S5PV210/S5PC110 series based systems
  747. config ARCH_EXYNOS
  748. bool "Samsung EXYNOS"
  749. select ARCH_HAS_CPUFREQ
  750. select ARCH_HAS_HOLES_MEMORYMODEL
  751. select ARCH_SPARSEMEM_ENABLE
  752. select CLKDEV_LOOKUP
  753. select CPU_V7
  754. select GENERIC_CLOCKEVENTS
  755. select GENERIC_GPIO
  756. select HAVE_CLK
  757. select HAVE_S3C2410_I2C if I2C
  758. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  759. select HAVE_S3C_RTC if RTC_CLASS
  760. select NEED_MACH_GPIO_H
  761. select NEED_MACH_MEMORY_H
  762. help
  763. Support for SAMSUNG's EXYNOS SoCs (EXYNOS4/5)
  764. config ARCH_SHARK
  765. bool "Shark"
  766. select ARCH_USES_GETTIMEOFFSET
  767. select CPU_SA110
  768. select ISA
  769. select ISA_DMA
  770. select NEED_MACH_MEMORY_H
  771. select PCI
  772. select ZONE_DMA
  773. help
  774. Support for the StrongARM based Digital DNARD machine, also known
  775. as "Shark" (<http://www.shark-linux.de/shark.html>).
  776. config ARCH_U300
  777. bool "ST-Ericsson U300 Series"
  778. depends on MMU
  779. select ARCH_REQUIRE_GPIOLIB
  780. select ARM_AMBA
  781. select ARM_PATCH_PHYS_VIRT
  782. select ARM_VIC
  783. select CLKDEV_LOOKUP
  784. select CLKSRC_MMIO
  785. select COMMON_CLK
  786. select CPU_ARM926T
  787. select GENERIC_CLOCKEVENTS
  788. select GENERIC_GPIO
  789. select HAVE_TCM
  790. select SPARSE_IRQ
  791. help
  792. Support for ST-Ericsson U300 series mobile platforms.
  793. config ARCH_U8500
  794. bool "ST-Ericsson U8500 Series"
  795. depends on MMU
  796. select ARCH_HAS_CPUFREQ
  797. select ARCH_REQUIRE_GPIOLIB
  798. select ARM_AMBA
  799. select CLKDEV_LOOKUP
  800. select CPU_V7
  801. select GENERIC_CLOCKEVENTS
  802. select HAVE_SMP
  803. select MIGHT_HAVE_CACHE_L2X0
  804. select SPARSE_IRQ
  805. help
  806. Support for ST-Ericsson's Ux500 architecture
  807. config ARCH_NOMADIK
  808. bool "STMicroelectronics Nomadik"
  809. select ARCH_REQUIRE_GPIOLIB
  810. select ARM_AMBA
  811. select ARM_VIC
  812. select COMMON_CLK
  813. select CPU_ARM926T
  814. select GENERIC_CLOCKEVENTS
  815. select MIGHT_HAVE_CACHE_L2X0
  816. select PINCTRL
  817. select PINCTRL_STN8815
  818. select SPARSE_IRQ
  819. help
  820. Support for the Nomadik platform by ST-Ericsson
  821. config PLAT_SPEAR
  822. bool "ST SPEAr"
  823. select ARCH_HAS_CPUFREQ
  824. select ARCH_REQUIRE_GPIOLIB
  825. select ARM_AMBA
  826. select CLKDEV_LOOKUP
  827. select CLKSRC_MMIO
  828. select COMMON_CLK
  829. select GENERIC_CLOCKEVENTS
  830. select HAVE_CLK
  831. help
  832. Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
  833. config ARCH_DAVINCI
  834. bool "TI DaVinci"
  835. select ARCH_HAS_HOLES_MEMORYMODEL
  836. select ARCH_REQUIRE_GPIOLIB
  837. select CLKDEV_LOOKUP
  838. select GENERIC_ALLOCATOR
  839. select GENERIC_CLOCKEVENTS
  840. select GENERIC_IRQ_CHIP
  841. select HAVE_IDE
  842. select NEED_MACH_GPIO_H
  843. select USE_OF
  844. select ZONE_DMA
  845. help
  846. Support for TI's DaVinci platform.
  847. config ARCH_OMAP
  848. bool "TI OMAP"
  849. depends on MMU
  850. select ARCH_HAS_CPUFREQ
  851. select ARCH_HAS_HOLES_MEMORYMODEL
  852. select ARCH_REQUIRE_GPIOLIB
  853. select CLKSRC_MMIO
  854. select GENERIC_CLOCKEVENTS
  855. select HAVE_CLK
  856. help
  857. Support for TI's OMAP platform (OMAP1/2/3/4).
  858. config ARCH_VT8500_SINGLE
  859. bool "VIA/WonderMedia 85xx"
  860. select ARCH_HAS_CPUFREQ
  861. select ARCH_REQUIRE_GPIOLIB
  862. select CLKDEV_LOOKUP
  863. select COMMON_CLK
  864. select CPU_ARM926T
  865. select GENERIC_CLOCKEVENTS
  866. select GENERIC_GPIO
  867. select HAVE_CLK
  868. select MULTI_IRQ_HANDLER
  869. select SPARSE_IRQ
  870. select USE_OF
  871. help
  872. Support for VIA/WonderMedia VT8500/WM85xx System-on-Chip.
  873. endchoice
  874. menu "Multiple platform selection"
  875. depends on ARCH_MULTIPLATFORM
  876. comment "CPU Core family selection"
  877. config ARCH_MULTI_V4
  878. bool "ARMv4 based platforms (FA526, StrongARM)"
  879. depends on !ARCH_MULTI_V6_V7
  880. select ARCH_MULTI_V4_V5
  881. config ARCH_MULTI_V4T
  882. bool "ARMv4T based platforms (ARM720T, ARM920T, ...)"
  883. depends on !ARCH_MULTI_V6_V7
  884. select ARCH_MULTI_V4_V5
  885. config ARCH_MULTI_V5
  886. bool "ARMv5 based platforms (ARM926T, XSCALE, PJ1, ...)"
  887. depends on !ARCH_MULTI_V6_V7
  888. select ARCH_MULTI_V4_V5
  889. config ARCH_MULTI_V4_V5
  890. bool
  891. config ARCH_MULTI_V6
  892. bool "ARMv6 based platforms (ARM11, Scorpion, ...)"
  893. select ARCH_MULTI_V6_V7
  894. select CPU_V6
  895. config ARCH_MULTI_V7
  896. bool "ARMv7 based platforms (Cortex-A, PJ4, Krait)"
  897. default y
  898. select ARCH_MULTI_V6_V7
  899. select ARCH_VEXPRESS
  900. select CPU_V7
  901. config ARCH_MULTI_V6_V7
  902. bool
  903. config ARCH_MULTI_CPU_AUTO
  904. def_bool !(ARCH_MULTI_V4 || ARCH_MULTI_V4T || ARCH_MULTI_V6_V7)
  905. select ARCH_MULTI_V5
  906. endmenu
  907. #
  908. # This is sorted alphabetically by mach-* pathname. However, plat-*
  909. # Kconfigs may be included either alphabetically (according to the
  910. # plat- suffix) or along side the corresponding mach-* source.
  911. #
  912. source "arch/arm/mach-mvebu/Kconfig"
  913. source "arch/arm/mach-at91/Kconfig"
  914. source "arch/arm/mach-bcm/Kconfig"
  915. source "arch/arm/mach-clps711x/Kconfig"
  916. source "arch/arm/mach-cns3xxx/Kconfig"
  917. source "arch/arm/mach-davinci/Kconfig"
  918. source "arch/arm/mach-dove/Kconfig"
  919. source "arch/arm/mach-ep93xx/Kconfig"
  920. source "arch/arm/mach-footbridge/Kconfig"
  921. source "arch/arm/mach-gemini/Kconfig"
  922. source "arch/arm/mach-h720x/Kconfig"
  923. source "arch/arm/mach-highbank/Kconfig"
  924. source "arch/arm/mach-integrator/Kconfig"
  925. source "arch/arm/mach-iop32x/Kconfig"
  926. source "arch/arm/mach-iop33x/Kconfig"
  927. source "arch/arm/mach-iop13xx/Kconfig"
  928. source "arch/arm/mach-ixp4xx/Kconfig"
  929. source "arch/arm/mach-kirkwood/Kconfig"
  930. source "arch/arm/mach-ks8695/Kconfig"
  931. source "arch/arm/mach-msm/Kconfig"
  932. source "arch/arm/mach-mv78xx0/Kconfig"
  933. source "arch/arm/mach-imx/Kconfig"
  934. source "arch/arm/mach-mxs/Kconfig"
  935. source "arch/arm/mach-netx/Kconfig"
  936. source "arch/arm/mach-nomadik/Kconfig"
  937. source "arch/arm/plat-omap/Kconfig"
  938. source "arch/arm/mach-omap1/Kconfig"
  939. source "arch/arm/mach-omap2/Kconfig"
  940. source "arch/arm/mach-orion5x/Kconfig"
  941. source "arch/arm/mach-picoxcell/Kconfig"
  942. source "arch/arm/mach-pxa/Kconfig"
  943. source "arch/arm/plat-pxa/Kconfig"
  944. source "arch/arm/mach-mmp/Kconfig"
  945. source "arch/arm/mach-realview/Kconfig"
  946. source "arch/arm/mach-sa1100/Kconfig"
  947. source "arch/arm/plat-samsung/Kconfig"
  948. source "arch/arm/plat-s3c24xx/Kconfig"
  949. source "arch/arm/mach-socfpga/Kconfig"
  950. source "arch/arm/plat-spear/Kconfig"
  951. source "arch/arm/mach-s3c24xx/Kconfig"
  952. if ARCH_S3C24XX
  953. source "arch/arm/mach-s3c2412/Kconfig"
  954. source "arch/arm/mach-s3c2440/Kconfig"
  955. endif
  956. if ARCH_S3C64XX
  957. source "arch/arm/mach-s3c64xx/Kconfig"
  958. endif
  959. source "arch/arm/mach-s5p64x0/Kconfig"
  960. source "arch/arm/mach-s5pc100/Kconfig"
  961. source "arch/arm/mach-s5pv210/Kconfig"
  962. source "arch/arm/mach-exynos/Kconfig"
  963. source "arch/arm/mach-shmobile/Kconfig"
  964. source "arch/arm/mach-sunxi/Kconfig"
  965. source "arch/arm/mach-prima2/Kconfig"
  966. source "arch/arm/mach-tegra/Kconfig"
  967. source "arch/arm/mach-u300/Kconfig"
  968. source "arch/arm/mach-ux500/Kconfig"
  969. source "arch/arm/mach-versatile/Kconfig"
  970. source "arch/arm/mach-vexpress/Kconfig"
  971. source "arch/arm/plat-versatile/Kconfig"
  972. source "arch/arm/mach-vt8500/Kconfig"
  973. source "arch/arm/mach-w90x900/Kconfig"
  974. source "arch/arm/mach-zynq/Kconfig"
  975. # Definitions to make life easier
  976. config ARCH_ACORN
  977. bool
  978. config PLAT_IOP
  979. bool
  980. select GENERIC_CLOCKEVENTS
  981. config PLAT_ORION
  982. bool
  983. select CLKSRC_MMIO
  984. select COMMON_CLK
  985. select GENERIC_IRQ_CHIP
  986. select IRQ_DOMAIN
  987. config PLAT_ORION_LEGACY
  988. bool
  989. select PLAT_ORION
  990. config PLAT_PXA
  991. bool
  992. config PLAT_VERSATILE
  993. bool
  994. config ARM_TIMER_SP804
  995. bool
  996. select CLKSRC_MMIO
  997. select HAVE_SCHED_CLOCK
  998. source arch/arm/mm/Kconfig
  999. config ARM_NR_BANKS
  1000. int
  1001. default 16 if ARCH_EP93XX
  1002. default 8
  1003. config IWMMXT
  1004. bool "Enable iWMMXt support"
  1005. depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
  1006. default y if PXA27x || PXA3xx || ARCH_MMP
  1007. help
  1008. Enable support for iWMMXt context switching at run time if
  1009. running on a CPU that supports it.
  1010. config XSCALE_PMU
  1011. bool
  1012. depends on CPU_XSCALE
  1013. default y
  1014. config MULTI_IRQ_HANDLER
  1015. bool
  1016. help
  1017. Allow each machine to specify it's own IRQ handler at run time.
  1018. if !MMU
  1019. source "arch/arm/Kconfig-nommu"
  1020. endif
  1021. config ARM_ERRATA_326103
  1022. bool "ARM errata: FSR write bit incorrect on a SWP to read-only memory"
  1023. depends on CPU_V6
  1024. help
  1025. Executing a SWP instruction to read-only memory does not set bit 11
  1026. of the FSR on the ARM 1136 prior to r1p0. This causes the kernel to
  1027. treat the access as a read, preventing a COW from occurring and
  1028. causing the faulting task to livelock.
  1029. config ARM_ERRATA_411920
  1030. bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
  1031. depends on CPU_V6 || CPU_V6K
  1032. help
  1033. Invalidation of the Instruction Cache operation can
  1034. fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
  1035. It does not affect the MPCore. This option enables the ARM Ltd.
  1036. recommended workaround.
  1037. config ARM_ERRATA_430973
  1038. bool "ARM errata: Stale prediction on replaced interworking branch"
  1039. depends on CPU_V7
  1040. help
  1041. This option enables the workaround for the 430973 Cortex-A8
  1042. (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
  1043. interworking branch is replaced with another code sequence at the
  1044. same virtual address, whether due to self-modifying code or virtual
  1045. to physical address re-mapping, Cortex-A8 does not recover from the
  1046. stale interworking branch prediction. This results in Cortex-A8
  1047. executing the new code sequence in the incorrect ARM or Thumb state.
  1048. The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
  1049. and also flushes the branch target cache at every context switch.
  1050. Note that setting specific bits in the ACTLR register may not be
  1051. available in non-secure mode.
  1052. config ARM_ERRATA_458693
  1053. bool "ARM errata: Processor deadlock when a false hazard is created"
  1054. depends on CPU_V7
  1055. help
  1056. This option enables the workaround for the 458693 Cortex-A8 (r2p0)
  1057. erratum. For very specific sequences of memory operations, it is
  1058. possible for a hazard condition intended for a cache line to instead
  1059. be incorrectly associated with a different cache line. This false
  1060. hazard might then cause a processor deadlock. The workaround enables
  1061. the L1 caching of the NEON accesses and disables the PLD instruction
  1062. in the ACTLR register. Note that setting specific bits in the ACTLR
  1063. register may not be available in non-secure mode.
  1064. config ARM_ERRATA_460075
  1065. bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
  1066. depends on CPU_V7
  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. help
  1079. This option enables the workaround for the 742230 Cortex-A9
  1080. (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
  1081. between two write operations may not ensure the correct visibility
  1082. ordering of the two writes. This workaround sets a specific bit in
  1083. the diagnostic register of the Cortex-A9 which causes the DMB
  1084. instruction to behave as a DSB, ensuring the correct behaviour of
  1085. the two writes.
  1086. config ARM_ERRATA_742231
  1087. bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
  1088. depends on CPU_V7 && SMP
  1089. help
  1090. This option enables the workaround for the 742231 Cortex-A9
  1091. (r2p0..r2p2) erratum. Under certain conditions, specific to the
  1092. Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
  1093. accessing some data located in the same cache line, may get corrupted
  1094. data due to bad handling of the address hazard when the line gets
  1095. replaced from one of the CPUs at the same time as another CPU is
  1096. accessing it. This workaround sets specific bits in the diagnostic
  1097. register of the Cortex-A9 which reduces the linefill issuing
  1098. capabilities of the processor.
  1099. config PL310_ERRATA_588369
  1100. bool "PL310 errata: Clean & Invalidate maintenance operations do not invalidate clean lines"
  1101. depends on CACHE_L2X0
  1102. help
  1103. The PL310 L2 cache controller implements three types of Clean &
  1104. Invalidate maintenance operations: by Physical Address
  1105. (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
  1106. They are architecturally defined to behave as the execution of a
  1107. clean operation followed immediately by an invalidate operation,
  1108. both performing to the same memory location. This functionality
  1109. is not correctly implemented in PL310 as clean lines are not
  1110. invalidated as a result of these operations.
  1111. config ARM_ERRATA_720789
  1112. bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
  1113. depends on CPU_V7
  1114. help
  1115. This option enables the workaround for the 720789 Cortex-A9 (prior to
  1116. r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
  1117. broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
  1118. As a consequence of this erratum, some TLB entries which should be
  1119. invalidated are not, resulting in an incoherency in the system page
  1120. tables. The workaround changes the TLB flushing routines to invalidate
  1121. entries regardless of the ASID.
  1122. config PL310_ERRATA_727915
  1123. bool "PL310 errata: Background Clean & Invalidate by Way operation can cause data corruption"
  1124. depends on CACHE_L2X0
  1125. help
  1126. PL310 implements the Clean & Invalidate by Way L2 cache maintenance
  1127. operation (offset 0x7FC). This operation runs in background so that
  1128. PL310 can handle normal accesses while it is in progress. Under very
  1129. rare circumstances, due to this erratum, write data can be lost when
  1130. PL310 treats a cacheable write transaction during a Clean &
  1131. Invalidate by Way operation.
  1132. config ARM_ERRATA_743622
  1133. bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
  1134. depends on CPU_V7
  1135. help
  1136. This option enables the workaround for the 743622 Cortex-A9
  1137. (r2p*) erratum. Under very rare conditions, a faulty
  1138. optimisation in the Cortex-A9 Store Buffer may lead to data
  1139. corruption. This workaround sets a specific bit in the diagnostic
  1140. register of the Cortex-A9 which disables the Store Buffer
  1141. optimisation, preventing the defect from occurring. This has no
  1142. visible impact on the overall performance or power consumption of the
  1143. processor.
  1144. config ARM_ERRATA_751472
  1145. bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
  1146. depends on CPU_V7
  1147. help
  1148. This option enables the workaround for the 751472 Cortex-A9 (prior
  1149. to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
  1150. completion of a following broadcasted operation if the second
  1151. operation is received by a CPU before the ICIALLUIS has completed,
  1152. potentially leading to corrupted entries in the cache or TLB.
  1153. config PL310_ERRATA_753970
  1154. bool "PL310 errata: cache sync operation may be faulty"
  1155. depends on CACHE_PL310
  1156. help
  1157. This option enables the workaround for the 753970 PL310 (r3p0) erratum.
  1158. Under some condition the effect of cache sync operation on
  1159. the store buffer still remains when the operation completes.
  1160. This means that the store buffer is always asked to drain and
  1161. this prevents it from merging any further writes. The workaround
  1162. is to replace the normal offset of cache sync operation (0x730)
  1163. by another offset targeting an unmapped PL310 register 0x740.
  1164. This has the same effect as the cache sync operation: store buffer
  1165. drain and waiting for all buffers empty.
  1166. config ARM_ERRATA_754322
  1167. bool "ARM errata: possible faulty MMU translations following an ASID switch"
  1168. depends on CPU_V7
  1169. help
  1170. This option enables the workaround for the 754322 Cortex-A9 (r2p*,
  1171. r3p*) erratum. A speculative memory access may cause a page table walk
  1172. which starts prior to an ASID switch but completes afterwards. This
  1173. can populate the micro-TLB with a stale entry which may be hit with
  1174. the new ASID. This workaround places two dsb instructions in the mm
  1175. switching code so that no page table walks can cross the ASID switch.
  1176. config ARM_ERRATA_754327
  1177. bool "ARM errata: no automatic Store Buffer drain"
  1178. depends on CPU_V7 && SMP
  1179. help
  1180. This option enables the workaround for the 754327 Cortex-A9 (prior to
  1181. r2p0) erratum. The Store Buffer does not have any automatic draining
  1182. mechanism and therefore a livelock may occur if an external agent
  1183. continuously polls a memory location waiting to observe an update.
  1184. This workaround defines cpu_relax() as smp_mb(), preventing correctly
  1185. written polling loops from denying visibility of updates to memory.
  1186. config ARM_ERRATA_364296
  1187. bool "ARM errata: Possible cache data corruption with hit-under-miss enabled"
  1188. depends on CPU_V6 && !SMP
  1189. help
  1190. This options enables the workaround for the 364296 ARM1136
  1191. r0p2 erratum (possible cache data corruption with
  1192. hit-under-miss enabled). It sets the undocumented bit 31 in
  1193. the auxiliary control register and the FI bit in the control
  1194. register, thus disabling hit-under-miss without putting the
  1195. processor into full low interrupt latency mode. ARM11MPCore
  1196. is not affected.
  1197. config ARM_ERRATA_764369
  1198. bool "ARM errata: Data cache line maintenance operation by MVA may not succeed"
  1199. depends on CPU_V7 && SMP
  1200. help
  1201. This option enables the workaround for erratum 764369
  1202. affecting Cortex-A9 MPCore with two or more processors (all
  1203. current revisions). Under certain timing circumstances, a data
  1204. cache line maintenance operation by MVA targeting an Inner
  1205. Shareable memory region may fail to proceed up to either the
  1206. Point of Coherency or to the Point of Unification of the
  1207. system. This workaround adds a DSB instruction before the
  1208. relevant cache maintenance functions and sets a specific bit
  1209. in the diagnostic control register of the SCU.
  1210. config PL310_ERRATA_769419
  1211. bool "PL310 errata: no automatic Store Buffer drain"
  1212. depends on CACHE_L2X0
  1213. help
  1214. On revisions of the PL310 prior to r3p2, the Store Buffer does
  1215. not automatically drain. This can cause normal, non-cacheable
  1216. writes to be retained when the memory system is idle, leading
  1217. to suboptimal I/O performance for drivers using coherent DMA.
  1218. This option adds a write barrier to the cpu_idle loop so that,
  1219. on systems with an outer cache, the store buffer is drained
  1220. explicitly.
  1221. config ARM_ERRATA_775420
  1222. bool "ARM errata: A data cache maintenance operation which aborts, might lead to deadlock"
  1223. depends on CPU_V7
  1224. help
  1225. This option enables the workaround for the 775420 Cortex-A9 (r2p2,
  1226. r2p6,r2p8,r2p10,r3p0) erratum. In case a date cache maintenance
  1227. operation aborts with MMU exception, it might cause the processor
  1228. to deadlock. This workaround puts DSB before executing ISB if
  1229. an abort may occur on cache maintenance.
  1230. endmenu
  1231. source "arch/arm/common/Kconfig"
  1232. menu "Bus support"
  1233. config ARM_AMBA
  1234. bool
  1235. config ISA
  1236. bool
  1237. help
  1238. Find out whether you have ISA slots on your motherboard. ISA is the
  1239. name of a bus system, i.e. the way the CPU talks to the other stuff
  1240. inside your box. Other bus systems are PCI, EISA, MicroChannel
  1241. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  1242. newer boards don't support it. If you have ISA, say Y, otherwise N.
  1243. # Select ISA DMA controller support
  1244. config ISA_DMA
  1245. bool
  1246. select ISA_DMA_API
  1247. # Select ISA DMA interface
  1248. config ISA_DMA_API
  1249. bool
  1250. config PCI
  1251. bool "PCI support" if MIGHT_HAVE_PCI
  1252. help
  1253. Find out whether you have a PCI motherboard. PCI is the name of a
  1254. bus system, i.e. the way the CPU talks to the other stuff inside
  1255. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  1256. VESA. If you have PCI, say Y, otherwise N.
  1257. config PCI_DOMAINS
  1258. bool
  1259. depends on PCI
  1260. config PCI_NANOENGINE
  1261. bool "BSE nanoEngine PCI support"
  1262. depends on SA1100_NANOENGINE
  1263. help
  1264. Enable PCI on the BSE nanoEngine board.
  1265. config PCI_SYSCALL
  1266. def_bool PCI
  1267. # Select the host bridge type
  1268. config PCI_HOST_VIA82C505
  1269. bool
  1270. depends on PCI && ARCH_SHARK
  1271. default y
  1272. config PCI_HOST_ITE8152
  1273. bool
  1274. depends on PCI && MACH_ARMCORE
  1275. default y
  1276. select DMABOUNCE
  1277. source "drivers/pci/Kconfig"
  1278. source "drivers/pcmcia/Kconfig"
  1279. endmenu
  1280. menu "Kernel Features"
  1281. config HAVE_SMP
  1282. bool
  1283. help
  1284. This option should be selected by machines which have an SMP-
  1285. capable CPU.
  1286. The only effect of this option is to make the SMP-related
  1287. options available to the user for configuration.
  1288. config SMP
  1289. bool "Symmetric Multi-Processing"
  1290. depends on CPU_V6K || CPU_V7
  1291. depends on GENERIC_CLOCKEVENTS
  1292. depends on HAVE_SMP
  1293. depends on MMU
  1294. select HAVE_ARM_SCU if !ARCH_MSM_SCORPIONMP
  1295. select USE_GENERIC_SMP_HELPERS
  1296. help
  1297. This enables support for systems with more than one CPU. If you have
  1298. a system with only one CPU, like most personal computers, say N. If
  1299. you have a system with more than one CPU, say Y.
  1300. If you say N here, the kernel will run on single and multiprocessor
  1301. machines, but will use only one CPU of a multiprocessor machine. If
  1302. you say Y here, the kernel will run on many, but not all, single
  1303. processor machines. On a single processor machine, the kernel will
  1304. run faster if you say N here.
  1305. See also <file:Documentation/x86/i386/IO-APIC.txt>,
  1306. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  1307. <http://tldp.org/HOWTO/SMP-HOWTO.html>.
  1308. If you don't know what to do here, say N.
  1309. config SMP_ON_UP
  1310. bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
  1311. depends on EXPERIMENTAL
  1312. depends on SMP && !XIP_KERNEL
  1313. default y
  1314. help
  1315. SMP kernels contain instructions which fail on non-SMP processors.
  1316. Enabling this option allows the kernel to modify itself to make
  1317. these instructions safe. Disabling it allows about 1K of space
  1318. savings.
  1319. If you don't know what to do here, say Y.
  1320. config ARM_CPU_TOPOLOGY
  1321. bool "Support cpu topology definition"
  1322. depends on SMP && CPU_V7
  1323. default y
  1324. help
  1325. Support ARM cpu topology definition. The MPIDR register defines
  1326. affinity between processors which is then used to describe the cpu
  1327. topology of an ARM System.
  1328. config SCHED_MC
  1329. bool "Multi-core scheduler support"
  1330. depends on ARM_CPU_TOPOLOGY
  1331. help
  1332. Multi-core scheduler support improves the CPU scheduler's decision
  1333. making when dealing with multi-core CPU chips at a cost of slightly
  1334. increased overhead in some places. If unsure say N here.
  1335. config SCHED_SMT
  1336. bool "SMT scheduler support"
  1337. depends on ARM_CPU_TOPOLOGY
  1338. help
  1339. Improves the CPU scheduler's decision making when dealing with
  1340. MultiThreading at a cost of slightly increased overhead in some
  1341. places. If unsure say N here.
  1342. config HAVE_ARM_SCU
  1343. bool
  1344. help
  1345. This option enables support for the ARM system coherency unit
  1346. config ARM_ARCH_TIMER
  1347. bool "Architected timer support"
  1348. depends on CPU_V7
  1349. help
  1350. This option enables support for the ARM architected timer
  1351. config HAVE_ARM_TWD
  1352. bool
  1353. depends on SMP
  1354. help
  1355. This options enables support for the ARM timer and watchdog unit
  1356. choice
  1357. prompt "Memory split"
  1358. default VMSPLIT_3G
  1359. help
  1360. Select the desired split between kernel and user memory.
  1361. If you are not absolutely sure what you are doing, leave this
  1362. option alone!
  1363. config VMSPLIT_3G
  1364. bool "3G/1G user/kernel split"
  1365. config VMSPLIT_2G
  1366. bool "2G/2G user/kernel split"
  1367. config VMSPLIT_1G
  1368. bool "1G/3G user/kernel split"
  1369. endchoice
  1370. config PAGE_OFFSET
  1371. hex
  1372. default 0x40000000 if VMSPLIT_1G
  1373. default 0x80000000 if VMSPLIT_2G
  1374. default 0xC0000000
  1375. config NR_CPUS
  1376. int "Maximum number of CPUs (2-32)"
  1377. range 2 32
  1378. depends on SMP
  1379. default "4"
  1380. config HOTPLUG_CPU
  1381. bool "Support for hot-pluggable CPUs"
  1382. depends on SMP && HOTPLUG
  1383. help
  1384. Say Y here to experiment with turning CPUs off and on. CPUs
  1385. can be controlled through /sys/devices/system/cpu.
  1386. config LOCAL_TIMERS
  1387. bool "Use local timer interrupts"
  1388. depends on SMP
  1389. default y
  1390. select HAVE_ARM_TWD if (!ARCH_MSM_SCORPIONMP && !EXYNOS4_MCT)
  1391. help
  1392. Enable support for local timers on SMP platforms, rather then the
  1393. legacy IPI broadcast method. Local timers allows the system
  1394. accounting to be spread across the timer interval, preventing a
  1395. "thundering herd" at every timer tick.
  1396. config ARCH_NR_GPIO
  1397. int
  1398. default 1024 if ARCH_SHMOBILE || ARCH_TEGRA
  1399. default 355 if ARCH_U8500
  1400. default 264 if MACH_H4700
  1401. default 512 if SOC_OMAP5
  1402. default 288 if ARCH_VT8500
  1403. default 0
  1404. help
  1405. Maximum number of GPIOs in the system.
  1406. If unsure, leave the default value.
  1407. source kernel/Kconfig.preempt
  1408. config HZ
  1409. int
  1410. default 200 if ARCH_EBSA110 || ARCH_S3C24XX || ARCH_S5P64X0 || \
  1411. ARCH_S5PV210 || ARCH_EXYNOS4
  1412. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  1413. default AT91_TIMER_HZ if ARCH_AT91
  1414. default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
  1415. default 100
  1416. config THUMB2_KERNEL
  1417. bool "Compile the kernel in Thumb-2 mode"
  1418. depends on CPU_V7 && !CPU_V6 && !CPU_V6K
  1419. select AEABI
  1420. select ARM_ASM_UNIFIED
  1421. select ARM_UNWIND
  1422. help
  1423. By enabling this option, the kernel will be compiled in
  1424. Thumb-2 mode. A compiler/assembler that understand the unified
  1425. ARM-Thumb syntax is needed.
  1426. If unsure, say N.
  1427. config THUMB2_AVOID_R_ARM_THM_JUMP11
  1428. bool "Work around buggy Thumb-2 short branch relocations in gas"
  1429. depends on THUMB2_KERNEL && MODULES
  1430. default y
  1431. help
  1432. Various binutils versions can resolve Thumb-2 branches to
  1433. locally-defined, preemptible global symbols as short-range "b.n"
  1434. branch instructions.
  1435. This is a problem, because there's no guarantee the final
  1436. destination of the symbol, or any candidate locations for a
  1437. trampoline, are within range of the branch. For this reason, the
  1438. kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
  1439. relocation in modules at all, and it makes little sense to add
  1440. support.
  1441. The symptom is that the kernel fails with an "unsupported
  1442. relocation" error when loading some modules.
  1443. Until fixed tools are available, passing
  1444. -fno-optimize-sibling-calls to gcc should prevent gcc generating
  1445. code which hits this problem, at the cost of a bit of extra runtime
  1446. stack usage in some cases.
  1447. The problem is described in more detail at:
  1448. https://bugs.launchpad.net/binutils-linaro/+bug/725126
  1449. Only Thumb-2 kernels are affected.
  1450. Unless you are sure your tools don't have this problem, say Y.
  1451. config ARM_ASM_UNIFIED
  1452. bool
  1453. config AEABI
  1454. bool "Use the ARM EABI to compile the kernel"
  1455. help
  1456. This option allows for the kernel to be compiled using the latest
  1457. ARM ABI (aka EABI). This is only useful if you are using a user
  1458. space environment that is also compiled with EABI.
  1459. Since there are major incompatibilities between the legacy ABI and
  1460. EABI, especially with regard to structure member alignment, this
  1461. option also changes the kernel syscall calling convention to
  1462. disambiguate both ABIs and allow for backward compatibility support
  1463. (selected with CONFIG_OABI_COMPAT).
  1464. To use this you need GCC version 4.0.0 or later.
  1465. config OABI_COMPAT
  1466. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  1467. depends on AEABI && EXPERIMENTAL && !THUMB2_KERNEL
  1468. default y
  1469. help
  1470. This option preserves the old syscall interface along with the
  1471. new (ARM EABI) one. It also provides a compatibility layer to
  1472. intercept syscalls that have structure arguments which layout
  1473. in memory differs between the legacy ABI and the new ARM EABI
  1474. (only for non "thumb" binaries). This option adds a tiny
  1475. overhead to all syscalls and produces a slightly larger kernel.
  1476. If you know you'll be using only pure EABI user space then you
  1477. can say N here. If this option is not selected and you attempt
  1478. to execute a legacy ABI binary then the result will be
  1479. UNPREDICTABLE (in fact it can be predicted that it won't work
  1480. at all). If in doubt say Y.
  1481. config ARCH_HAS_HOLES_MEMORYMODEL
  1482. bool
  1483. config ARCH_SPARSEMEM_ENABLE
  1484. bool
  1485. config ARCH_SPARSEMEM_DEFAULT
  1486. def_bool ARCH_SPARSEMEM_ENABLE
  1487. config ARCH_SELECT_MEMORY_MODEL
  1488. def_bool ARCH_SPARSEMEM_ENABLE
  1489. config HAVE_ARCH_PFN_VALID
  1490. def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
  1491. config HIGHMEM
  1492. bool "High Memory Support"
  1493. depends on MMU
  1494. help
  1495. The address space of ARM processors is only 4 Gigabytes large
  1496. and it has to accommodate user address space, kernel address
  1497. space as well as some memory mapped IO. That means that, if you
  1498. have a large amount of physical memory and/or IO, not all of the
  1499. memory can be "permanently mapped" by the kernel. The physical
  1500. memory that is not permanently mapped is called "high memory".
  1501. Depending on the selected kernel/user memory split, minimum
  1502. vmalloc space and actual amount of RAM, you may not need this
  1503. option which should result in a slightly faster kernel.
  1504. If unsure, say n.
  1505. config HIGHPTE
  1506. bool "Allocate 2nd-level pagetables from highmem"
  1507. depends on HIGHMEM
  1508. config HW_PERF_EVENTS
  1509. bool "Enable hardware performance counter support for perf events"
  1510. depends on PERF_EVENTS
  1511. default y
  1512. help
  1513. Enable hardware performance counter support for perf events. If
  1514. disabled, perf events will use software events only.
  1515. source "mm/Kconfig"
  1516. config FORCE_MAX_ZONEORDER
  1517. int "Maximum zone order" if ARCH_SHMOBILE
  1518. range 11 64 if ARCH_SHMOBILE
  1519. default "12" if SOC_AM33XX
  1520. default "9" if SA1111
  1521. default "11"
  1522. help
  1523. The kernel memory allocator divides physically contiguous memory
  1524. blocks into "zones", where each zone is a power of two number of
  1525. pages. This option selects the largest power of two that the kernel
  1526. keeps in the memory allocator. If you need to allocate very large
  1527. blocks of physically contiguous memory, then you may need to
  1528. increase this value.
  1529. This config option is actually maximum order plus one. For example,
  1530. a value of 11 means that the largest free memory block is 2^10 pages.
  1531. config ALIGNMENT_TRAP
  1532. bool
  1533. depends on CPU_CP15_MMU
  1534. default y if !ARCH_EBSA110
  1535. select HAVE_PROC_CPU if PROC_FS
  1536. help
  1537. ARM processors cannot fetch/store information which is not
  1538. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  1539. address divisible by 4. On 32-bit ARM processors, these non-aligned
  1540. fetch/store instructions will be emulated in software if you say
  1541. here, which has a severe performance impact. This is necessary for
  1542. correct operation of some network protocols. With an IP-only
  1543. configuration it is safe to say N, otherwise say Y.
  1544. config UACCESS_WITH_MEMCPY
  1545. bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user()"
  1546. depends on MMU
  1547. default y if CPU_FEROCEON
  1548. help
  1549. Implement faster copy_to_user and clear_user methods for CPU
  1550. cores where a 8-word STM instruction give significantly higher
  1551. memory write throughput than a sequence of individual 32bit stores.
  1552. A possible side effect is a slight increase in scheduling latency
  1553. between threads sharing the same address space if they invoke
  1554. such copy operations with large buffers.
  1555. However, if the CPU data cache is using a write-allocate mode,
  1556. this option is unlikely to provide any performance gain.
  1557. config SECCOMP
  1558. bool
  1559. prompt "Enable seccomp to safely compute untrusted bytecode"
  1560. ---help---
  1561. This kernel feature is useful for number crunching applications
  1562. that may need to compute untrusted bytecode during their
  1563. execution. By using pipes or other transports made available to
  1564. the process as file descriptors supporting the read/write
  1565. syscalls, it's possible to isolate those applications in
  1566. their own address space using seccomp. Once seccomp is
  1567. enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
  1568. and the task is only allowed to execute a few safe syscalls
  1569. defined by each seccomp mode.
  1570. config CC_STACKPROTECTOR
  1571. bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
  1572. depends on EXPERIMENTAL
  1573. help
  1574. This option turns on the -fstack-protector GCC feature. This
  1575. feature puts, at the beginning of functions, a canary value on
  1576. the stack just before the return address, and validates
  1577. the value just before actually returning. Stack based buffer
  1578. overflows (that need to overwrite this return address) now also
  1579. overwrite the canary, which gets detected and the attack is then
  1580. neutralized via a kernel panic.
  1581. This feature requires gcc version 4.2 or above.
  1582. config XEN_DOM0
  1583. def_bool y
  1584. depends on XEN
  1585. config XEN
  1586. bool "Xen guest support on ARM (EXPERIMENTAL)"
  1587. depends on EXPERIMENTAL && ARM && OF
  1588. depends on CPU_V7 && !CPU_V6
  1589. help
  1590. Say Y if you want to run Linux in a Virtual Machine on Xen on ARM.
  1591. endmenu
  1592. menu "Boot options"
  1593. config USE_OF
  1594. bool "Flattened Device Tree support"
  1595. select IRQ_DOMAIN
  1596. select OF
  1597. select OF_EARLY_FLATTREE
  1598. help
  1599. Include support for flattened device tree machine descriptions.
  1600. config ATAGS
  1601. bool "Support for the traditional ATAGS boot data passing" if USE_OF
  1602. default y
  1603. help
  1604. This is the traditional way of passing data to the kernel at boot
  1605. time. If you are solely relying on the flattened device tree (or
  1606. the ARM_ATAG_DTB_COMPAT option) then you may unselect this option
  1607. to remove ATAGS support from your kernel binary. If unsure,
  1608. leave this to y.
  1609. config DEPRECATED_PARAM_STRUCT
  1610. bool "Provide old way to pass kernel parameters"
  1611. depends on ATAGS
  1612. help
  1613. This was deprecated in 2001 and announced to live on for 5 years.
  1614. Some old boot loaders still use this way.
  1615. # Compressed boot loader in ROM. Yes, we really want to ask about
  1616. # TEXT and BSS so we preserve their values in the config files.
  1617. config ZBOOT_ROM_TEXT
  1618. hex "Compressed ROM boot loader base address"
  1619. default "0"
  1620. help
  1621. The physical address at which the ROM-able zImage is to be
  1622. placed in the target. Platforms which normally make use of
  1623. ROM-able zImage formats normally set this to a suitable
  1624. value in their defconfig file.
  1625. If ZBOOT_ROM is not enabled, this has no effect.
  1626. config ZBOOT_ROM_BSS
  1627. hex "Compressed ROM boot loader BSS address"
  1628. default "0"
  1629. help
  1630. The base address of an area of read/write memory in the target
  1631. for the ROM-able zImage which must be available while the
  1632. decompressor is running. It must be large enough to hold the
  1633. entire decompressed kernel plus an additional 128 KiB.
  1634. Platforms which normally make use of ROM-able zImage formats
  1635. normally set this to a suitable value in their defconfig file.
  1636. If ZBOOT_ROM is not enabled, this has no effect.
  1637. config ZBOOT_ROM
  1638. bool "Compressed boot loader in ROM/flash"
  1639. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  1640. help
  1641. Say Y here if you intend to execute your compressed kernel image
  1642. (zImage) directly from ROM or flash. If unsure, say N.
  1643. choice
  1644. prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)"
  1645. depends on ZBOOT_ROM && ARCH_SH7372 && EXPERIMENTAL
  1646. default ZBOOT_ROM_NONE
  1647. help
  1648. Include experimental SD/MMC loading code in the ROM-able zImage.
  1649. With this enabled it is possible to write the ROM-able zImage
  1650. kernel image to an MMC or SD card and boot the kernel straight
  1651. from the reset vector. At reset the processor Mask ROM will load
  1652. the first part of the ROM-able zImage which in turn loads the
  1653. rest the kernel image to RAM.
  1654. config ZBOOT_ROM_NONE
  1655. bool "No SD/MMC loader in zImage (EXPERIMENTAL)"
  1656. help
  1657. Do not load image from SD or MMC
  1658. config ZBOOT_ROM_MMCIF
  1659. bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
  1660. help
  1661. Load image from MMCIF hardware block.
  1662. config ZBOOT_ROM_SH_MOBILE_SDHI
  1663. bool "Include SuperH Mobile SDHI loader in zImage (EXPERIMENTAL)"
  1664. help
  1665. Load image from SDHI hardware block
  1666. endchoice
  1667. config ARM_APPENDED_DTB
  1668. bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
  1669. depends on OF && !ZBOOT_ROM && EXPERIMENTAL
  1670. help
  1671. With this option, the boot code will look for a device tree binary
  1672. (DTB) appended to zImage
  1673. (e.g. cat zImage <filename>.dtb > zImage_w_dtb).
  1674. This is meant as a backward compatibility convenience for those
  1675. systems with a bootloader that can't be upgraded to accommodate
  1676. the documented boot protocol using a device tree.
  1677. Beware that there is very little in terms of protection against
  1678. this option being confused by leftover garbage in memory that might
  1679. look like a DTB header after a reboot if no actual DTB is appended
  1680. to zImage. Do not leave this option active in a production kernel
  1681. if you don't intend to always append a DTB. Proper passing of the
  1682. location into r2 of a bootloader provided DTB is always preferable
  1683. to this option.
  1684. config ARM_ATAG_DTB_COMPAT
  1685. bool "Supplement the appended DTB with traditional ATAG information"
  1686. depends on ARM_APPENDED_DTB
  1687. help
  1688. Some old bootloaders can't be updated to a DTB capable one, yet
  1689. they provide ATAGs with memory configuration, the ramdisk address,
  1690. the kernel cmdline string, etc. Such information is dynamically
  1691. provided by the bootloader and can't always be stored in a static
  1692. DTB. To allow a device tree enabled kernel to be used with such
  1693. bootloaders, this option allows zImage to extract the information
  1694. from the ATAG list and store it at run time into the appended DTB.
  1695. choice
  1696. prompt "Kernel command line type" if ARM_ATAG_DTB_COMPAT
  1697. default ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
  1698. config ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
  1699. bool "Use bootloader kernel arguments if available"
  1700. help
  1701. Uses the command-line options passed by the boot loader instead of
  1702. the device tree bootargs property. If the boot loader doesn't provide
  1703. any, the device tree bootargs property will be used.
  1704. config ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEND
  1705. bool "Extend with bootloader kernel arguments"
  1706. help
  1707. The command-line arguments provided by the boot loader will be
  1708. appended to the the device tree bootargs property.
  1709. endchoice
  1710. config CMDLINE
  1711. string "Default kernel command string"
  1712. default ""
  1713. help
  1714. On some architectures (EBSA110 and CATS), there is currently no way
  1715. for the boot loader to pass arguments to the kernel. For these
  1716. architectures, you should supply some command-line options at build
  1717. time by entering them here. As a minimum, you should specify the
  1718. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  1719. choice
  1720. prompt "Kernel command line type" if CMDLINE != ""
  1721. default CMDLINE_FROM_BOOTLOADER
  1722. depends on ATAGS
  1723. config CMDLINE_FROM_BOOTLOADER
  1724. bool "Use bootloader kernel arguments if available"
  1725. help
  1726. Uses the command-line options passed by the boot loader. If
  1727. the boot loader doesn't provide any, the default kernel command
  1728. string provided in CMDLINE will be used.
  1729. config CMDLINE_EXTEND
  1730. bool "Extend bootloader kernel arguments"
  1731. help
  1732. The command-line arguments provided by the boot loader will be
  1733. appended to the default kernel command string.
  1734. config CMDLINE_FORCE
  1735. bool "Always use the default kernel command string"
  1736. help
  1737. Always use the default kernel command string, even if the boot
  1738. loader passes other arguments to the kernel.
  1739. This is useful if you cannot or don't want to change the
  1740. command-line options your boot loader passes to the kernel.
  1741. endchoice
  1742. config XIP_KERNEL
  1743. bool "Kernel Execute-In-Place from ROM"
  1744. depends on !ZBOOT_ROM && !ARM_LPAE && !ARCH_MULTIPLATFORM
  1745. help
  1746. Execute-In-Place allows the kernel to run from non-volatile storage
  1747. directly addressable by the CPU, such as NOR flash. This saves RAM
  1748. space since the text section of the kernel is not loaded from flash
  1749. to RAM. Read-write sections, such as the data section and stack,
  1750. are still copied to RAM. The XIP kernel is not compressed since
  1751. it has to run directly from flash, so it will take more space to
  1752. store it. The flash address used to link the kernel object files,
  1753. and for storing it, is configuration dependent. Therefore, if you
  1754. say Y here, you must know the proper physical address where to
  1755. store the kernel image depending on your own flash memory usage.
  1756. Also note that the make target becomes "make xipImage" rather than
  1757. "make zImage" or "make Image". The final kernel binary to put in
  1758. ROM memory will be arch/arm/boot/xipImage.
  1759. If unsure, say N.
  1760. config XIP_PHYS_ADDR
  1761. hex "XIP Kernel Physical Location"
  1762. depends on XIP_KERNEL
  1763. default "0x00080000"
  1764. help
  1765. This is the physical address in your flash memory the kernel will
  1766. be linked for and stored to. This address is dependent on your
  1767. own flash usage.
  1768. config KEXEC
  1769. bool "Kexec system call (EXPERIMENTAL)"
  1770. depends on EXPERIMENTAL && (!SMP || HOTPLUG_CPU)
  1771. help
  1772. kexec is a system call that implements the ability to shutdown your
  1773. current kernel, and to start another kernel. It is like a reboot
  1774. but it is independent of the system firmware. And like a reboot
  1775. you can start any kernel with it, not just Linux.
  1776. It is an ongoing process to be certain the hardware in a machine
  1777. is properly shutdown, so do not be surprised if this code does not
  1778. initially work for you. It may help to enable device hotplugging
  1779. support.
  1780. config ATAGS_PROC
  1781. bool "Export atags in procfs"
  1782. depends on ATAGS && KEXEC
  1783. default y
  1784. help
  1785. Should the atags used to boot the kernel be exported in an "atags"
  1786. file in procfs. Useful with kexec.
  1787. config CRASH_DUMP
  1788. bool "Build kdump crash kernel (EXPERIMENTAL)"
  1789. depends on EXPERIMENTAL
  1790. help
  1791. Generate crash dump after being started by kexec. This should
  1792. be normally only set in special crash dump kernels which are
  1793. loaded in the main kernel with kexec-tools into a specially
  1794. reserved region and then later executed after a crash by
  1795. kdump/kexec. The crash dump kernel must be compiled to a
  1796. memory address not used by the main kernel
  1797. For more details see Documentation/kdump/kdump.txt
  1798. config AUTO_ZRELADDR
  1799. bool "Auto calculation of the decompressed kernel image address"
  1800. depends on !ZBOOT_ROM && !ARCH_U300
  1801. help
  1802. ZRELADDR is the physical address where the decompressed kernel
  1803. image will be placed. If AUTO_ZRELADDR is selected, the address
  1804. will be determined at run-time by masking the current IP with
  1805. 0xf8000000. This assumes the zImage being placed in the first 128MB
  1806. from start of memory.
  1807. endmenu
  1808. menu "CPU Power Management"
  1809. if ARCH_HAS_CPUFREQ
  1810. source "drivers/cpufreq/Kconfig"
  1811. config CPU_FREQ_IMX
  1812. tristate "CPUfreq driver for i.MX CPUs"
  1813. depends on ARCH_MXC && CPU_FREQ
  1814. select CPU_FREQ_TABLE
  1815. help
  1816. This enables the CPUfreq driver for i.MX CPUs.
  1817. config CPU_FREQ_SA1100
  1818. bool
  1819. config CPU_FREQ_SA1110
  1820. bool
  1821. config CPU_FREQ_INTEGRATOR
  1822. tristate "CPUfreq driver for ARM Integrator CPUs"
  1823. depends on ARCH_INTEGRATOR && CPU_FREQ
  1824. default y
  1825. help
  1826. This enables the CPUfreq driver for ARM Integrator CPUs.
  1827. For details, take a look at <file:Documentation/cpu-freq>.
  1828. If in doubt, say Y.
  1829. config CPU_FREQ_PXA
  1830. bool
  1831. depends on CPU_FREQ && ARCH_PXA && PXA25x
  1832. default y
  1833. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  1834. select CPU_FREQ_TABLE
  1835. config CPU_FREQ_S3C
  1836. bool
  1837. help
  1838. Internal configuration node for common cpufreq on Samsung SoC
  1839. config CPU_FREQ_S3C24XX
  1840. bool "CPUfreq driver for Samsung S3C24XX series CPUs (EXPERIMENTAL)"
  1841. depends on ARCH_S3C24XX && CPU_FREQ && EXPERIMENTAL
  1842. select CPU_FREQ_S3C
  1843. help
  1844. This enables the CPUfreq driver for the Samsung S3C24XX family
  1845. of CPUs.
  1846. For details, take a look at <file:Documentation/cpu-freq>.
  1847. If in doubt, say N.
  1848. config CPU_FREQ_S3C24XX_PLL
  1849. bool "Support CPUfreq changing of PLL frequency (EXPERIMENTAL)"
  1850. depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
  1851. help
  1852. Compile in support for changing the PLL frequency from the
  1853. S3C24XX series CPUfreq driver. The PLL takes time to settle
  1854. after a frequency change, so by default it is not enabled.
  1855. This also means that the PLL tables for the selected CPU(s) will
  1856. be built which may increase the size of the kernel image.
  1857. config CPU_FREQ_S3C24XX_DEBUG
  1858. bool "Debug CPUfreq Samsung driver core"
  1859. depends on CPU_FREQ_S3C24XX
  1860. help
  1861. Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
  1862. config CPU_FREQ_S3C24XX_IODEBUG
  1863. bool "Debug CPUfreq Samsung driver IO timing"
  1864. depends on CPU_FREQ_S3C24XX
  1865. help
  1866. Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
  1867. config CPU_FREQ_S3C24XX_DEBUGFS
  1868. bool "Export debugfs for CPUFreq"
  1869. depends on CPU_FREQ_S3C24XX && DEBUG_FS
  1870. help
  1871. Export status information via debugfs.
  1872. endif
  1873. source "drivers/cpuidle/Kconfig"
  1874. endmenu
  1875. menu "Floating point emulation"
  1876. comment "At least one emulation must be selected"
  1877. config FPE_NWFPE
  1878. bool "NWFPE math emulation"
  1879. depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
  1880. ---help---
  1881. Say Y to include the NWFPE floating point emulator in the kernel.
  1882. This is necessary to run most binaries. Linux does not currently
  1883. support floating point hardware so you need to say Y here even if
  1884. your machine has an FPA or floating point co-processor podule.
  1885. You may say N here if you are going to load the Acorn FPEmulator
  1886. early in the bootup.
  1887. config FPE_NWFPE_XP
  1888. bool "Support extended precision"
  1889. depends on FPE_NWFPE
  1890. help
  1891. Say Y to include 80-bit support in the kernel floating-point
  1892. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  1893. Note that gcc does not generate 80-bit operations by default,
  1894. so in most cases this option only enlarges the size of the
  1895. floating point emulator without any good reason.
  1896. You almost surely want to say N here.
  1897. config FPE_FASTFPE
  1898. bool "FastFPE math emulation (EXPERIMENTAL)"
  1899. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  1900. ---help---
  1901. Say Y here to include the FAST floating point emulator in the kernel.
  1902. This is an experimental much faster emulator which now also has full
  1903. precision for the mantissa. It does not support any exceptions.
  1904. It is very simple, and approximately 3-6 times faster than NWFPE.
  1905. It should be sufficient for most programs. It may be not suitable
  1906. for scientific calculations, but you have to check this for yourself.
  1907. If you do not feel you need a faster FP emulation you should better
  1908. choose NWFPE.
  1909. config VFP
  1910. bool "VFP-format floating point maths"
  1911. depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  1912. help
  1913. Say Y to include VFP support code in the kernel. This is needed
  1914. if your hardware includes a VFP unit.
  1915. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  1916. release notes and additional status information.
  1917. Say N if your target does not have VFP hardware.
  1918. config VFPv3
  1919. bool
  1920. depends on VFP
  1921. default y if CPU_V7
  1922. config NEON
  1923. bool "Advanced SIMD (NEON) Extension support"
  1924. depends on VFPv3 && CPU_V7
  1925. help
  1926. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  1927. Extension.
  1928. endmenu
  1929. menu "Userspace binary formats"
  1930. source "fs/Kconfig.binfmt"
  1931. config ARTHUR
  1932. tristate "RISC OS personality"
  1933. depends on !AEABI
  1934. help
  1935. Say Y here to include the kernel code necessary if you want to run
  1936. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  1937. experimental; if this sounds frightening, say N and sleep in peace.
  1938. You can also say M here to compile this support as a module (which
  1939. will be called arthur).
  1940. endmenu
  1941. menu "Power management options"
  1942. source "kernel/power/Kconfig"
  1943. config ARCH_SUSPEND_POSSIBLE
  1944. depends on !ARCH_S5PC100
  1945. depends on CPU_ARM920T || CPU_ARM926T || CPU_SA1100 || \
  1946. CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE || CPU_MOHAWK
  1947. def_bool y
  1948. config ARM_CPU_SUSPEND
  1949. def_bool PM_SLEEP
  1950. endmenu
  1951. source "net/Kconfig"
  1952. source "drivers/Kconfig"
  1953. source "fs/Kconfig"
  1954. source "arch/arm/Kconfig.debug"
  1955. source "security/Kconfig"
  1956. source "crypto/Kconfig"
  1957. source "lib/Kconfig"