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_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_PCI_IOMAP
  16. select GENERIC_SMP_IDLE_THREAD
  17. select GENERIC_STRNCPY_FROM_USER
  18. select GENERIC_STRNLEN_USER
  19. select HARDIRQS_SW_RESEND
  20. select HAVE_AOUT
  21. select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL
  22. select HAVE_ARCH_KGDB
  23. select HAVE_ARCH_SECCOMP_FILTER
  24. select HAVE_ARCH_TRACEHOOK
  25. select HAVE_BPF_JIT
  26. select HAVE_C_RECORDMCOUNT
  27. select HAVE_DEBUG_KMEMLEAK
  28. select HAVE_DMA_API_DEBUG
  29. select HAVE_DMA_ATTRS
  30. select HAVE_DMA_CONTIGUOUS if MMU
  31. select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL)
  32. select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
  33. select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL)
  34. select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
  35. select HAVE_GENERIC_DMA_COHERENT
  36. select HAVE_GENERIC_HARDIRQS
  37. select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7))
  38. select HAVE_IDE if PCI || ISA || PCMCIA
  39. select HAVE_KERNEL_GZIP
  40. select HAVE_KERNEL_LZMA
  41. select HAVE_KERNEL_LZO
  42. select HAVE_KERNEL_XZ
  43. select HAVE_KPROBES if !XIP_KERNEL
  44. select HAVE_KRETPROBES if (HAVE_KPROBES)
  45. select HAVE_MEMBLOCK
  46. select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
  47. select HAVE_PERF_EVENTS
  48. select HAVE_REGS_AND_STACK_ACCESS_API
  49. select HAVE_SYSCALL_TRACEPOINTS
  50. select HAVE_UID16
  51. select KTIME_SCALAR
  52. select PERF_USE_VMALLOC
  53. select RTC_LIB
  54. select SYS_SUPPORTS_APM_EMULATION
  55. select HAVE_MOD_ARCH_SPECIFIC if ARM_UNWIND
  56. select MODULES_USE_ELF_REL
  57. select CLONE_BACKWARDS
  58. help
  59. The ARM series is a line of low-power-consumption RISC chip designs
  60. licensed by ARM Ltd and targeted at embedded applications and
  61. handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
  62. manufactured, but legacy ARM-based PC hardware remains popular in
  63. Europe. There is an ARM Linux project with a web page at
  64. <http://www.arm.linux.org.uk/>.
  65. config ARM_HAS_SG_CHAIN
  66. bool
  67. config NEED_SG_DMA_LENGTH
  68. bool
  69. config ARM_DMA_USE_IOMMU
  70. bool
  71. select ARM_HAS_SG_CHAIN
  72. select NEED_SG_DMA_LENGTH
  73. config HAVE_PWM
  74. bool
  75. config MIGHT_HAVE_PCI
  76. bool
  77. config SYS_SUPPORTS_APM_EMULATION
  78. bool
  79. config GENERIC_GPIO
  80. bool
  81. config HAVE_TCM
  82. bool
  83. select GENERIC_ALLOCATOR
  84. config HAVE_PROC_CPU
  85. bool
  86. config NO_IOPORT
  87. bool
  88. config EISA
  89. bool
  90. ---help---
  91. The Extended Industry Standard Architecture (EISA) bus was
  92. developed as an open alternative to the IBM MicroChannel bus.
  93. The EISA bus provided some of the features of the IBM MicroChannel
  94. bus while maintaining backward compatibility with cards made for
  95. the older ISA bus. The EISA bus saw limited use between 1988 and
  96. 1995 when it was made obsolete by the PCI bus.
  97. Say Y here if you are building a kernel for an EISA-based machine.
  98. Otherwise, say N.
  99. config SBUS
  100. bool
  101. config STACKTRACE_SUPPORT
  102. bool
  103. default y
  104. config HAVE_LATENCYTOP_SUPPORT
  105. bool
  106. depends on !SMP
  107. default y
  108. config LOCKDEP_SUPPORT
  109. bool
  110. default y
  111. config TRACE_IRQFLAGS_SUPPORT
  112. bool
  113. default y
  114. config RWSEM_GENERIC_SPINLOCK
  115. bool
  116. default y
  117. config RWSEM_XCHGADD_ALGORITHM
  118. bool
  119. config ARCH_HAS_ILOG2_U32
  120. bool
  121. config ARCH_HAS_ILOG2_U64
  122. bool
  123. config ARCH_HAS_CPUFREQ
  124. bool
  125. help
  126. Internal node to signify that the ARCH has CPUFREQ support
  127. and that the relevant menu configurations are displayed for
  128. it.
  129. config GENERIC_HWEIGHT
  130. bool
  131. default y
  132. config GENERIC_CALIBRATE_DELAY
  133. bool
  134. default y
  135. config ARCH_MAY_HAVE_PC_FDC
  136. bool
  137. config ZONE_DMA
  138. bool
  139. config NEED_DMA_MAP_STATE
  140. def_bool y
  141. config ARCH_HAS_DMA_SET_COHERENT_MASK
  142. bool
  143. config GENERIC_ISA_DMA
  144. bool
  145. config FIQ
  146. bool
  147. config NEED_RET_TO_USER
  148. bool
  149. config ARCH_MTD_XIP
  150. bool
  151. config VECTORS_BASE
  152. hex
  153. default 0xffff0000 if MMU || CPU_HIGH_VECTOR
  154. default DRAM_BASE if REMAP_VECTORS_TO_RAM
  155. default 0x00000000
  156. help
  157. The base address of exception vectors.
  158. config ARM_PATCH_PHYS_VIRT
  159. bool "Patch physical to virtual translations at runtime" if EMBEDDED
  160. default y
  161. depends on !XIP_KERNEL && MMU
  162. depends on !ARCH_REALVIEW || !SPARSEMEM
  163. help
  164. Patch phys-to-virt and virt-to-phys translation functions at
  165. boot and module load time according to the position of the
  166. kernel in system memory.
  167. This can only be used with non-XIP MMU kernels where the base
  168. of physical memory is at a 16MB boundary.
  169. Only disable this option if you know that you do not require
  170. this feature (eg, building a kernel for a single machine) and
  171. you need to shrink the kernel to the minimal size.
  172. config NEED_MACH_GPIO_H
  173. bool
  174. help
  175. Select this when mach/gpio.h is required to provide special
  176. definitions for this platform. The need for mach/gpio.h should
  177. be avoided when possible.
  178. config NEED_MACH_IO_H
  179. bool
  180. help
  181. Select this when mach/io.h is required to provide special
  182. definitions for this platform. The need for mach/io.h should
  183. be avoided when possible.
  184. config NEED_MACH_MEMORY_H
  185. bool
  186. help
  187. Select this when mach/memory.h is required to provide special
  188. definitions for this platform. The need for mach/memory.h should
  189. be avoided when possible.
  190. config PHYS_OFFSET
  191. hex "Physical address of main memory" if MMU
  192. depends on !ARM_PATCH_PHYS_VIRT && !NEED_MACH_MEMORY_H
  193. default DRAM_BASE if !MMU
  194. help
  195. Please provide the physical address corresponding to the
  196. location of main memory in your system.
  197. config GENERIC_BUG
  198. def_bool y
  199. depends on BUG
  200. source "init/Kconfig"
  201. source "kernel/Kconfig.freezer"
  202. menu "System Type"
  203. config MMU
  204. bool "MMU-based Paged Memory Management Support"
  205. default y
  206. help
  207. Select if you want MMU-based virtualised addressing space
  208. support by paged memory management. If unsure, say 'Y'.
  209. #
  210. # The "ARM system type" choice list is ordered alphabetically by option
  211. # text. Please add new entries in the option alphabetic order.
  212. #
  213. choice
  214. prompt "ARM system type"
  215. default ARCH_MULTIPLATFORM
  216. config ARCH_MULTIPLATFORM
  217. bool "Allow multiple platforms to be selected"
  218. depends on MMU
  219. select ARM_PATCH_PHYS_VIRT
  220. select AUTO_ZRELADDR
  221. select COMMON_CLK
  222. select MULTI_IRQ_HANDLER
  223. select SPARSE_IRQ
  224. select USE_OF
  225. config ARCH_INTEGRATOR
  226. bool "ARM Ltd. Integrator family"
  227. select ARCH_HAS_CPUFREQ
  228. select ARM_AMBA
  229. select COMMON_CLK
  230. select COMMON_CLK_VERSATILE
  231. select GENERIC_CLOCKEVENTS
  232. select HAVE_TCM
  233. select ICST
  234. select MULTI_IRQ_HANDLER
  235. select NEED_MACH_MEMORY_H
  236. select PLAT_VERSATILE
  237. select SPARSE_IRQ
  238. select VERSATILE_FPGA_IRQ
  239. help
  240. Support for ARM's Integrator platform.
  241. config ARCH_REALVIEW
  242. bool "ARM Ltd. RealView family"
  243. select ARCH_WANT_OPTIONAL_GPIOLIB
  244. select ARM_AMBA
  245. select ARM_TIMER_SP804
  246. select COMMON_CLK
  247. select COMMON_CLK_VERSATILE
  248. select GENERIC_CLOCKEVENTS
  249. select GPIO_PL061 if GPIOLIB
  250. select ICST
  251. select NEED_MACH_MEMORY_H
  252. select PLAT_VERSATILE
  253. select PLAT_VERSATILE_CLCD
  254. help
  255. This enables support for ARM Ltd RealView boards.
  256. config ARCH_VERSATILE
  257. bool "ARM Ltd. Versatile family"
  258. select ARCH_WANT_OPTIONAL_GPIOLIB
  259. select ARM_AMBA
  260. select ARM_TIMER_SP804
  261. select ARM_VIC
  262. select CLKDEV_LOOKUP
  263. select GENERIC_CLOCKEVENTS
  264. select HAVE_MACH_CLKDEV
  265. select ICST
  266. select PLAT_VERSATILE
  267. select PLAT_VERSATILE_CLCD
  268. select PLAT_VERSATILE_CLOCK
  269. select VERSATILE_FPGA_IRQ
  270. help
  271. This enables support for ARM Ltd Versatile board.
  272. config ARCH_AT91
  273. bool "Atmel AT91"
  274. select ARCH_REQUIRE_GPIOLIB
  275. select CLKDEV_LOOKUP
  276. select HAVE_CLK
  277. select IRQ_DOMAIN
  278. select NEED_MACH_GPIO_H
  279. select NEED_MACH_IO_H if PCCARD
  280. select PINCTRL
  281. select PINCTRL_AT91 if USE_OF
  282. help
  283. This enables support for systems based on Atmel
  284. AT91RM9200 and AT91SAM9* processors.
  285. config ARCH_BCM2835
  286. bool "Broadcom BCM2835 family"
  287. select ARCH_REQUIRE_GPIOLIB
  288. select ARM_AMBA
  289. select ARM_ERRATA_411920
  290. select ARM_TIMER_SP804
  291. select CLKDEV_LOOKUP
  292. select COMMON_CLK
  293. select CPU_V6
  294. select GENERIC_CLOCKEVENTS
  295. select GENERIC_GPIO
  296. select MULTI_IRQ_HANDLER
  297. select PINCTRL
  298. select PINCTRL_BCM2835
  299. select SPARSE_IRQ
  300. select USE_OF
  301. help
  302. This enables support for the Broadcom BCM2835 SoC. This SoC is
  303. use in the Raspberry Pi, and Roku 2 devices.
  304. config ARCH_CNS3XXX
  305. bool "Cavium Networks CNS3XXX family"
  306. select ARM_GIC
  307. select CPU_V6K
  308. select GENERIC_CLOCKEVENTS
  309. select MIGHT_HAVE_CACHE_L2X0
  310. select MIGHT_HAVE_PCI
  311. select PCI_DOMAINS if PCI
  312. help
  313. Support for Cavium Networks CNS3XXX platform.
  314. config ARCH_CLPS711X
  315. bool "Cirrus Logic CLPS711x/EP721x/EP731x-based"
  316. select ARCH_REQUIRE_GPIOLIB
  317. select AUTO_ZRELADDR
  318. select CLKDEV_LOOKUP
  319. select COMMON_CLK
  320. select CPU_ARM720T
  321. select GENERIC_CLOCKEVENTS
  322. select MULTI_IRQ_HANDLER
  323. select NEED_MACH_MEMORY_H
  324. select SPARSE_IRQ
  325. help
  326. Support for Cirrus Logic 711x/721x/731x based boards.
  327. config ARCH_GEMINI
  328. bool "Cortina Systems Gemini"
  329. select ARCH_REQUIRE_GPIOLIB
  330. select ARCH_USES_GETTIMEOFFSET
  331. select CPU_FA526
  332. help
  333. Support for the Cortina Systems Gemini family SoCs
  334. config ARCH_SIRF
  335. bool "CSR SiRF"
  336. select ARCH_REQUIRE_GPIOLIB
  337. select COMMON_CLK
  338. select GENERIC_CLOCKEVENTS
  339. select GENERIC_IRQ_CHIP
  340. select MIGHT_HAVE_CACHE_L2X0
  341. select NO_IOPORT
  342. select PINCTRL
  343. select PINCTRL_SIRF
  344. select USE_OF
  345. help
  346. Support for CSR SiRFprimaII/Marco/Polo platforms
  347. config ARCH_EBSA110
  348. bool "EBSA-110"
  349. select ARCH_USES_GETTIMEOFFSET
  350. select CPU_SA110
  351. select ISA
  352. select NEED_MACH_IO_H
  353. select NEED_MACH_MEMORY_H
  354. select NO_IOPORT
  355. help
  356. This is an evaluation board for the StrongARM processor available
  357. from Digital. It has limited hardware on-board, including an
  358. Ethernet interface, two PCMCIA sockets, two serial ports and a
  359. parallel port.
  360. config ARCH_EP93XX
  361. bool "EP93xx-based"
  362. select ARCH_HAS_HOLES_MEMORYMODEL
  363. select ARCH_REQUIRE_GPIOLIB
  364. select ARCH_USES_GETTIMEOFFSET
  365. select ARM_AMBA
  366. select ARM_VIC
  367. select CLKDEV_LOOKUP
  368. select CPU_ARM920T
  369. select NEED_MACH_MEMORY_H
  370. help
  371. This enables support for the Cirrus EP93xx series of CPUs.
  372. config ARCH_FOOTBRIDGE
  373. bool "FootBridge"
  374. select CPU_SA110
  375. select FOOTBRIDGE
  376. select GENERIC_CLOCKEVENTS
  377. select HAVE_IDE
  378. select NEED_MACH_IO_H if !MMU
  379. select NEED_MACH_MEMORY_H
  380. help
  381. Support for systems based on the DC21285 companion chip
  382. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  383. config ARCH_MXS
  384. bool "Freescale MXS-based"
  385. select ARCH_REQUIRE_GPIOLIB
  386. select CLKDEV_LOOKUP
  387. select CLKSRC_MMIO
  388. select COMMON_CLK
  389. select GENERIC_CLOCKEVENTS
  390. select HAVE_CLK_PREPARE
  391. select MULTI_IRQ_HANDLER
  392. select PINCTRL
  393. select SPARSE_IRQ
  394. select USE_OF
  395. help
  396. Support for Freescale MXS-based family of processors
  397. config ARCH_NETX
  398. bool "Hilscher NetX based"
  399. select ARM_VIC
  400. select CLKSRC_MMIO
  401. select CPU_ARM926T
  402. select GENERIC_CLOCKEVENTS
  403. help
  404. This enables support for systems based on the Hilscher NetX Soc
  405. config ARCH_H720X
  406. bool "Hynix HMS720x-based"
  407. select ARCH_USES_GETTIMEOFFSET
  408. select CPU_ARM720T
  409. select ISA_DMA_API
  410. help
  411. This enables support for systems based on the Hynix HMS720x
  412. config ARCH_IOP13XX
  413. bool "IOP13xx-based"
  414. depends on MMU
  415. select ARCH_SUPPORTS_MSI
  416. select CPU_XSC3
  417. select NEED_MACH_MEMORY_H
  418. select NEED_RET_TO_USER
  419. select PCI
  420. select PLAT_IOP
  421. select VMSPLIT_1G
  422. help
  423. Support for Intel's IOP13XX (XScale) family of processors.
  424. config ARCH_IOP32X
  425. bool "IOP32x-based"
  426. depends on MMU
  427. select ARCH_REQUIRE_GPIOLIB
  428. select CPU_XSCALE
  429. select NEED_MACH_GPIO_H
  430. select NEED_RET_TO_USER
  431. select PCI
  432. select PLAT_IOP
  433. help
  434. Support for Intel's 80219 and IOP32X (XScale) family of
  435. processors.
  436. config ARCH_IOP33X
  437. bool "IOP33x-based"
  438. depends on MMU
  439. select ARCH_REQUIRE_GPIOLIB
  440. select CPU_XSCALE
  441. select NEED_MACH_GPIO_H
  442. select NEED_RET_TO_USER
  443. select PCI
  444. select PLAT_IOP
  445. help
  446. Support for Intel's IOP33X (XScale) family of processors.
  447. config ARCH_IXP4XX
  448. bool "IXP4xx-based"
  449. depends on MMU
  450. select ARCH_HAS_DMA_SET_COHERENT_MASK
  451. select ARCH_REQUIRE_GPIOLIB
  452. select CLKSRC_MMIO
  453. select CPU_XSCALE
  454. select DMABOUNCE if PCI
  455. select GENERIC_CLOCKEVENTS
  456. select MIGHT_HAVE_PCI
  457. select NEED_MACH_IO_H
  458. help
  459. Support for Intel's IXP4XX (XScale) family of processors.
  460. config ARCH_DOVE
  461. bool "Marvell Dove"
  462. select ARCH_REQUIRE_GPIOLIB
  463. select COMMON_CLK_DOVE
  464. select CPU_V7
  465. select GENERIC_CLOCKEVENTS
  466. select MIGHT_HAVE_PCI
  467. select PINCTRL
  468. select PINCTRL_DOVE
  469. select PLAT_ORION_LEGACY
  470. select USB_ARCH_HAS_EHCI
  471. help
  472. Support for the Marvell Dove SoC 88AP510
  473. config ARCH_KIRKWOOD
  474. bool "Marvell Kirkwood"
  475. select ARCH_REQUIRE_GPIOLIB
  476. select CPU_FEROCEON
  477. select GENERIC_CLOCKEVENTS
  478. select PCI
  479. select PCI_QUIRKS
  480. select PINCTRL
  481. select PINCTRL_KIRKWOOD
  482. select PLAT_ORION_LEGACY
  483. help
  484. Support for the following Marvell Kirkwood series SoCs:
  485. 88F6180, 88F6192 and 88F6281.
  486. config ARCH_MV78XX0
  487. bool "Marvell MV78xx0"
  488. select ARCH_REQUIRE_GPIOLIB
  489. select CPU_FEROCEON
  490. select GENERIC_CLOCKEVENTS
  491. select PCI
  492. select PLAT_ORION_LEGACY
  493. help
  494. Support for the following Marvell MV78xx0 series SoCs:
  495. MV781x0, MV782x0.
  496. config ARCH_ORION5X
  497. bool "Marvell Orion"
  498. depends on MMU
  499. select ARCH_REQUIRE_GPIOLIB
  500. select CPU_FEROCEON
  501. select GENERIC_CLOCKEVENTS
  502. select PCI
  503. select PLAT_ORION_LEGACY
  504. help
  505. Support for the following Marvell Orion 5x series SoCs:
  506. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  507. Orion-2 (5281), Orion-1-90 (6183).
  508. config ARCH_MMP
  509. bool "Marvell PXA168/910/MMP2"
  510. depends on MMU
  511. select ARCH_REQUIRE_GPIOLIB
  512. select CLKDEV_LOOKUP
  513. select GENERIC_ALLOCATOR
  514. select GENERIC_CLOCKEVENTS
  515. select GPIO_PXA
  516. select IRQ_DOMAIN
  517. select NEED_MACH_GPIO_H
  518. select PINCTRL
  519. select PLAT_PXA
  520. select SPARSE_IRQ
  521. help
  522. Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
  523. config ARCH_KS8695
  524. bool "Micrel/Kendin KS8695"
  525. select ARCH_REQUIRE_GPIOLIB
  526. select CLKSRC_MMIO
  527. select CPU_ARM922T
  528. select GENERIC_CLOCKEVENTS
  529. select NEED_MACH_MEMORY_H
  530. help
  531. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  532. System-on-Chip devices.
  533. config ARCH_W90X900
  534. bool "Nuvoton W90X900 CPU"
  535. select ARCH_REQUIRE_GPIOLIB
  536. select CLKDEV_LOOKUP
  537. select CLKSRC_MMIO
  538. select CPU_ARM926T
  539. select GENERIC_CLOCKEVENTS
  540. help
  541. Support for Nuvoton (Winbond logic dept.) ARM9 processor,
  542. At present, the w90x900 has been renamed nuc900, regarding
  543. the ARM series product line, you can login the following
  544. link address to know more.
  545. <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
  546. ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
  547. config ARCH_LPC32XX
  548. bool "NXP LPC32XX"
  549. select ARCH_REQUIRE_GPIOLIB
  550. select ARM_AMBA
  551. select CLKDEV_LOOKUP
  552. select CLKSRC_MMIO
  553. select CPU_ARM926T
  554. select GENERIC_CLOCKEVENTS
  555. select HAVE_IDE
  556. select HAVE_PWM
  557. select USB_ARCH_HAS_OHCI
  558. select USE_OF
  559. help
  560. Support for the NXP LPC32XX family of processors
  561. config ARCH_TEGRA
  562. bool "NVIDIA Tegra"
  563. select ARCH_HAS_CPUFREQ
  564. select CLKDEV_LOOKUP
  565. select CLKSRC_MMIO
  566. select COMMON_CLK
  567. select GENERIC_CLOCKEVENTS
  568. select GENERIC_GPIO
  569. select HAVE_CLK
  570. select HAVE_SMP
  571. select MIGHT_HAVE_CACHE_L2X0
  572. select SPARSE_IRQ
  573. select USE_OF
  574. help
  575. This enables support for NVIDIA Tegra based systems (Tegra APX,
  576. Tegra 6xx and Tegra 2 series).
  577. config ARCH_PXA
  578. bool "PXA2xx/PXA3xx-based"
  579. depends on MMU
  580. select ARCH_HAS_CPUFREQ
  581. select ARCH_MTD_XIP
  582. select ARCH_REQUIRE_GPIOLIB
  583. select ARM_CPU_SUSPEND if PM
  584. select AUTO_ZRELADDR
  585. select CLKDEV_LOOKUP
  586. select CLKSRC_MMIO
  587. select GENERIC_CLOCKEVENTS
  588. select GPIO_PXA
  589. select HAVE_IDE
  590. select MULTI_IRQ_HANDLER
  591. select NEED_MACH_GPIO_H
  592. select PLAT_PXA
  593. select SPARSE_IRQ
  594. help
  595. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  596. config ARCH_MSM
  597. bool "Qualcomm MSM"
  598. select ARCH_REQUIRE_GPIOLIB
  599. select CLKDEV_LOOKUP
  600. select GENERIC_CLOCKEVENTS
  601. select HAVE_CLK
  602. help
  603. Support for Qualcomm MSM/QSD based systems. This runs on the
  604. apps processor of the MSM/QSD and depends on a shared memory
  605. interface to the modem processor which runs the baseband
  606. stack and controls some vital subsystems
  607. (clock and power control, etc).
  608. config ARCH_SHMOBILE
  609. bool "Renesas SH-Mobile / R-Mobile"
  610. select CLKDEV_LOOKUP
  611. select GENERIC_CLOCKEVENTS
  612. select HAVE_CLK
  613. select HAVE_MACH_CLKDEV
  614. select HAVE_SMP
  615. select MIGHT_HAVE_CACHE_L2X0
  616. select MULTI_IRQ_HANDLER
  617. select NEED_MACH_MEMORY_H
  618. select NO_IOPORT
  619. select PM_GENERIC_DOMAINS if PM
  620. select SPARSE_IRQ
  621. help
  622. Support for Renesas's SH-Mobile and R-Mobile ARM platforms.
  623. config ARCH_RPC
  624. bool "RiscPC"
  625. select ARCH_ACORN
  626. select ARCH_MAY_HAVE_PC_FDC
  627. select ARCH_SPARSEMEM_ENABLE
  628. select ARCH_USES_GETTIMEOFFSET
  629. select FIQ
  630. select HAVE_IDE
  631. select HAVE_PATA_PLATFORM
  632. select ISA_DMA_API
  633. select NEED_MACH_IO_H
  634. select NEED_MACH_MEMORY_H
  635. select NO_IOPORT
  636. help
  637. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  638. CD-ROM interface, serial and parallel port, and the floppy drive.
  639. config ARCH_SA1100
  640. bool "SA1100-based"
  641. select ARCH_HAS_CPUFREQ
  642. select ARCH_MTD_XIP
  643. select ARCH_REQUIRE_GPIOLIB
  644. select ARCH_SPARSEMEM_ENABLE
  645. select CLKDEV_LOOKUP
  646. select CLKSRC_MMIO
  647. select CPU_FREQ
  648. select CPU_SA1100
  649. select GENERIC_CLOCKEVENTS
  650. select HAVE_IDE
  651. select ISA
  652. select NEED_MACH_GPIO_H
  653. select NEED_MACH_MEMORY_H
  654. select SPARSE_IRQ
  655. help
  656. Support for StrongARM 11x0 based boards.
  657. config ARCH_S3C24XX
  658. bool "Samsung S3C24XX SoCs"
  659. select ARCH_HAS_CPUFREQ
  660. select ARCH_USES_GETTIMEOFFSET
  661. select CLKDEV_LOOKUP
  662. select GENERIC_GPIO
  663. select HAVE_CLK
  664. select HAVE_S3C2410_I2C if I2C
  665. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  666. select HAVE_S3C_RTC if RTC_CLASS
  667. select NEED_MACH_GPIO_H
  668. select NEED_MACH_IO_H
  669. help
  670. Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443
  671. and S3C2450 SoCs based systems, such as the Simtec Electronics BAST
  672. (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or the
  673. Samsung SMDK2410 development board (and derivatives).
  674. config ARCH_S3C64XX
  675. bool "Samsung S3C64XX"
  676. select ARCH_HAS_CPUFREQ
  677. select ARCH_REQUIRE_GPIOLIB
  678. select ARCH_USES_GETTIMEOFFSET
  679. select ARM_VIC
  680. select CLKDEV_LOOKUP
  681. select CPU_V6
  682. select HAVE_CLK
  683. select HAVE_S3C2410_I2C if I2C
  684. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  685. select HAVE_TCM
  686. select NEED_MACH_GPIO_H
  687. select NO_IOPORT
  688. select PLAT_SAMSUNG
  689. select S3C_DEV_NAND
  690. select S3C_GPIO_TRACK
  691. select SAMSUNG_CLKSRC
  692. select SAMSUNG_GPIOLIB_4BIT
  693. select SAMSUNG_IRQ_VIC_TIMER
  694. select USB_ARCH_HAS_OHCI
  695. help
  696. Samsung S3C64XX series based systems
  697. config ARCH_S5P64X0
  698. bool "Samsung S5P6440 S5P6450"
  699. select CLKDEV_LOOKUP
  700. select CLKSRC_MMIO
  701. select CPU_V6
  702. select GENERIC_CLOCKEVENTS
  703. select GENERIC_GPIO
  704. select HAVE_CLK
  705. select HAVE_S3C2410_I2C if I2C
  706. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  707. select HAVE_S3C_RTC if RTC_CLASS
  708. select NEED_MACH_GPIO_H
  709. help
  710. Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
  711. SMDK6450.
  712. config ARCH_S5PC100
  713. bool "Samsung S5PC100"
  714. select ARCH_USES_GETTIMEOFFSET
  715. select CLKDEV_LOOKUP
  716. select CPU_V7
  717. select GENERIC_GPIO
  718. select HAVE_CLK
  719. select HAVE_S3C2410_I2C if I2C
  720. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  721. select HAVE_S3C_RTC if RTC_CLASS
  722. select NEED_MACH_GPIO_H
  723. help
  724. Samsung S5PC100 series based systems
  725. config ARCH_S5PV210
  726. bool "Samsung S5PV210/S5PC110"
  727. select ARCH_HAS_CPUFREQ
  728. select ARCH_HAS_HOLES_MEMORYMODEL
  729. select ARCH_SPARSEMEM_ENABLE
  730. select CLKDEV_LOOKUP
  731. select CLKSRC_MMIO
  732. select CPU_V7
  733. select GENERIC_CLOCKEVENTS
  734. select GENERIC_GPIO
  735. select HAVE_CLK
  736. select HAVE_S3C2410_I2C if I2C
  737. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  738. select HAVE_S3C_RTC if RTC_CLASS
  739. select NEED_MACH_GPIO_H
  740. select NEED_MACH_MEMORY_H
  741. help
  742. Samsung S5PV210/S5PC110 series based systems
  743. config ARCH_EXYNOS
  744. bool "Samsung EXYNOS"
  745. select ARCH_HAS_CPUFREQ
  746. select ARCH_HAS_HOLES_MEMORYMODEL
  747. select ARCH_SPARSEMEM_ENABLE
  748. select CLKDEV_LOOKUP
  749. select CPU_V7
  750. select GENERIC_CLOCKEVENTS
  751. select GENERIC_GPIO
  752. select HAVE_CLK
  753. select HAVE_S3C2410_I2C if I2C
  754. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  755. select HAVE_S3C_RTC if RTC_CLASS
  756. select NEED_MACH_GPIO_H
  757. select NEED_MACH_MEMORY_H
  758. help
  759. Support for SAMSUNG's EXYNOS SoCs (EXYNOS4/5)
  760. config ARCH_SHARK
  761. bool "Shark"
  762. select ARCH_USES_GETTIMEOFFSET
  763. select CPU_SA110
  764. select ISA
  765. select ISA_DMA
  766. select NEED_MACH_MEMORY_H
  767. select PCI
  768. select ZONE_DMA
  769. help
  770. Support for the StrongARM based Digital DNARD machine, also known
  771. as "Shark" (<http://www.shark-linux.de/shark.html>).
  772. config ARCH_U300
  773. bool "ST-Ericsson U300 Series"
  774. depends on MMU
  775. select ARCH_REQUIRE_GPIOLIB
  776. select ARM_AMBA
  777. select ARM_PATCH_PHYS_VIRT
  778. select ARM_VIC
  779. select CLKDEV_LOOKUP
  780. select CLKSRC_MMIO
  781. select COMMON_CLK
  782. select CPU_ARM926T
  783. select GENERIC_CLOCKEVENTS
  784. select GENERIC_GPIO
  785. select HAVE_TCM
  786. select SPARSE_IRQ
  787. help
  788. Support for ST-Ericsson U300 series mobile platforms.
  789. config ARCH_U8500
  790. bool "ST-Ericsson U8500 Series"
  791. depends on MMU
  792. select ARCH_HAS_CPUFREQ
  793. select ARCH_REQUIRE_GPIOLIB
  794. select ARM_AMBA
  795. select CLKDEV_LOOKUP
  796. select CPU_V7
  797. select GENERIC_CLOCKEVENTS
  798. select HAVE_SMP
  799. select MIGHT_HAVE_CACHE_L2X0
  800. select SPARSE_IRQ
  801. help
  802. Support for ST-Ericsson's Ux500 architecture
  803. config ARCH_NOMADIK
  804. bool "STMicroelectronics Nomadik"
  805. select ARCH_REQUIRE_GPIOLIB
  806. select ARM_AMBA
  807. select ARM_VIC
  808. select COMMON_CLK
  809. select CPU_ARM926T
  810. select GENERIC_CLOCKEVENTS
  811. select MIGHT_HAVE_CACHE_L2X0
  812. select PINCTRL
  813. select PINCTRL_STN8815
  814. select SPARSE_IRQ
  815. help
  816. Support for the Nomadik platform by ST-Ericsson
  817. config PLAT_SPEAR
  818. bool "ST SPEAr"
  819. select ARCH_HAS_CPUFREQ
  820. select ARCH_REQUIRE_GPIOLIB
  821. select ARM_AMBA
  822. select CLKDEV_LOOKUP
  823. select CLKSRC_MMIO
  824. select COMMON_CLK
  825. select GENERIC_CLOCKEVENTS
  826. select HAVE_CLK
  827. help
  828. Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
  829. config ARCH_DAVINCI
  830. bool "TI DaVinci"
  831. select ARCH_HAS_HOLES_MEMORYMODEL
  832. select ARCH_REQUIRE_GPIOLIB
  833. select CLKDEV_LOOKUP
  834. select GENERIC_ALLOCATOR
  835. select GENERIC_CLOCKEVENTS
  836. select GENERIC_IRQ_CHIP
  837. select HAVE_IDE
  838. select NEED_MACH_GPIO_H
  839. select USE_OF
  840. select ZONE_DMA
  841. help
  842. Support for TI's DaVinci platform.
  843. config ARCH_OMAP
  844. bool "TI OMAP"
  845. depends on MMU
  846. select ARCH_HAS_CPUFREQ
  847. select ARCH_HAS_HOLES_MEMORYMODEL
  848. select ARCH_REQUIRE_GPIOLIB
  849. select CLKSRC_MMIO
  850. select GENERIC_CLOCKEVENTS
  851. select HAVE_CLK
  852. help
  853. Support for TI's OMAP platform (OMAP1/2/3/4).
  854. config ARCH_VT8500_SINGLE
  855. bool "VIA/WonderMedia 85xx"
  856. select ARCH_HAS_CPUFREQ
  857. select ARCH_REQUIRE_GPIOLIB
  858. select CLKDEV_LOOKUP
  859. select COMMON_CLK
  860. select CPU_ARM926T
  861. select GENERIC_CLOCKEVENTS
  862. select GENERIC_GPIO
  863. select HAVE_CLK
  864. select MULTI_IRQ_HANDLER
  865. select SPARSE_IRQ
  866. select USE_OF
  867. help
  868. Support for VIA/WonderMedia VT8500/WM85xx System-on-Chip.
  869. endchoice
  870. menu "Multiple platform selection"
  871. depends on ARCH_MULTIPLATFORM
  872. comment "CPU Core family selection"
  873. config ARCH_MULTI_V4
  874. bool "ARMv4 based platforms (FA526, StrongARM)"
  875. depends on !ARCH_MULTI_V6_V7
  876. select ARCH_MULTI_V4_V5
  877. config ARCH_MULTI_V4T
  878. bool "ARMv4T based platforms (ARM720T, ARM920T, ...)"
  879. depends on !ARCH_MULTI_V6_V7
  880. select ARCH_MULTI_V4_V5
  881. config ARCH_MULTI_V5
  882. bool "ARMv5 based platforms (ARM926T, XSCALE, PJ1, ...)"
  883. depends on !ARCH_MULTI_V6_V7
  884. select ARCH_MULTI_V4_V5
  885. config ARCH_MULTI_V4_V5
  886. bool
  887. config ARCH_MULTI_V6
  888. bool "ARMv6 based platforms (ARM11, Scorpion, ...)"
  889. select ARCH_MULTI_V6_V7
  890. select CPU_V6
  891. config ARCH_MULTI_V7
  892. bool "ARMv7 based platforms (Cortex-A, PJ4, Krait)"
  893. default y
  894. select ARCH_MULTI_V6_V7
  895. select ARCH_VEXPRESS
  896. select CPU_V7
  897. config ARCH_MULTI_V6_V7
  898. bool
  899. config ARCH_MULTI_CPU_AUTO
  900. def_bool !(ARCH_MULTI_V4 || ARCH_MULTI_V4T || ARCH_MULTI_V6_V7)
  901. select ARCH_MULTI_V5
  902. endmenu
  903. #
  904. # This is sorted alphabetically by mach-* pathname. However, plat-*
  905. # Kconfigs may be included either alphabetically (according to the
  906. # plat- suffix) or along side the corresponding mach-* source.
  907. #
  908. source "arch/arm/mach-mvebu/Kconfig"
  909. source "arch/arm/mach-at91/Kconfig"
  910. source "arch/arm/mach-bcm/Kconfig"
  911. source "arch/arm/mach-clps711x/Kconfig"
  912. source "arch/arm/mach-cns3xxx/Kconfig"
  913. source "arch/arm/mach-davinci/Kconfig"
  914. source "arch/arm/mach-dove/Kconfig"
  915. source "arch/arm/mach-ep93xx/Kconfig"
  916. source "arch/arm/mach-footbridge/Kconfig"
  917. source "arch/arm/mach-gemini/Kconfig"
  918. source "arch/arm/mach-h720x/Kconfig"
  919. source "arch/arm/mach-highbank/Kconfig"
  920. source "arch/arm/mach-integrator/Kconfig"
  921. source "arch/arm/mach-iop32x/Kconfig"
  922. source "arch/arm/mach-iop33x/Kconfig"
  923. source "arch/arm/mach-iop13xx/Kconfig"
  924. source "arch/arm/mach-ixp4xx/Kconfig"
  925. source "arch/arm/mach-kirkwood/Kconfig"
  926. source "arch/arm/mach-ks8695/Kconfig"
  927. source "arch/arm/mach-msm/Kconfig"
  928. source "arch/arm/mach-mv78xx0/Kconfig"
  929. source "arch/arm/mach-imx/Kconfig"
  930. source "arch/arm/mach-mxs/Kconfig"
  931. source "arch/arm/mach-netx/Kconfig"
  932. source "arch/arm/mach-nomadik/Kconfig"
  933. source "arch/arm/plat-omap/Kconfig"
  934. source "arch/arm/mach-omap1/Kconfig"
  935. source "arch/arm/mach-omap2/Kconfig"
  936. source "arch/arm/mach-orion5x/Kconfig"
  937. source "arch/arm/mach-picoxcell/Kconfig"
  938. source "arch/arm/mach-pxa/Kconfig"
  939. source "arch/arm/plat-pxa/Kconfig"
  940. source "arch/arm/mach-mmp/Kconfig"
  941. source "arch/arm/mach-realview/Kconfig"
  942. source "arch/arm/mach-sa1100/Kconfig"
  943. source "arch/arm/plat-samsung/Kconfig"
  944. source "arch/arm/plat-s3c24xx/Kconfig"
  945. source "arch/arm/mach-socfpga/Kconfig"
  946. source "arch/arm/plat-spear/Kconfig"
  947. source "arch/arm/mach-s3c24xx/Kconfig"
  948. if ARCH_S3C24XX
  949. source "arch/arm/mach-s3c2412/Kconfig"
  950. source "arch/arm/mach-s3c2440/Kconfig"
  951. endif
  952. if ARCH_S3C64XX
  953. source "arch/arm/mach-s3c64xx/Kconfig"
  954. endif
  955. source "arch/arm/mach-s5p64x0/Kconfig"
  956. source "arch/arm/mach-s5pc100/Kconfig"
  957. source "arch/arm/mach-s5pv210/Kconfig"
  958. source "arch/arm/mach-exynos/Kconfig"
  959. source "arch/arm/mach-shmobile/Kconfig"
  960. source "arch/arm/mach-sunxi/Kconfig"
  961. source "arch/arm/mach-prima2/Kconfig"
  962. source "arch/arm/mach-tegra/Kconfig"
  963. source "arch/arm/mach-u300/Kconfig"
  964. source "arch/arm/mach-ux500/Kconfig"
  965. source "arch/arm/mach-versatile/Kconfig"
  966. source "arch/arm/mach-vexpress/Kconfig"
  967. source "arch/arm/plat-versatile/Kconfig"
  968. source "arch/arm/mach-vt8500/Kconfig"
  969. source "arch/arm/mach-w90x900/Kconfig"
  970. source "arch/arm/mach-zynq/Kconfig"
  971. # Definitions to make life easier
  972. config ARCH_ACORN
  973. bool
  974. config PLAT_IOP
  975. bool
  976. select GENERIC_CLOCKEVENTS
  977. config PLAT_ORION
  978. bool
  979. select CLKSRC_MMIO
  980. select COMMON_CLK
  981. select GENERIC_IRQ_CHIP
  982. select IRQ_DOMAIN
  983. config PLAT_ORION_LEGACY
  984. bool
  985. select PLAT_ORION
  986. config PLAT_PXA
  987. bool
  988. config PLAT_VERSATILE
  989. bool
  990. config ARM_TIMER_SP804
  991. bool
  992. select CLKSRC_MMIO
  993. select HAVE_SCHED_CLOCK
  994. source arch/arm/mm/Kconfig
  995. config ARM_NR_BANKS
  996. int
  997. default 16 if ARCH_EP93XX
  998. default 8
  999. config IWMMXT
  1000. bool "Enable iWMMXt support"
  1001. depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
  1002. default y if PXA27x || PXA3xx || ARCH_MMP
  1003. help
  1004. Enable support for iWMMXt context switching at run time if
  1005. running on a CPU that supports it.
  1006. config XSCALE_PMU
  1007. bool
  1008. depends on CPU_XSCALE
  1009. default y
  1010. config MULTI_IRQ_HANDLER
  1011. bool
  1012. help
  1013. Allow each machine to specify it's own IRQ handler at run time.
  1014. if !MMU
  1015. source "arch/arm/Kconfig-nommu"
  1016. endif
  1017. config ARM_ERRATA_326103
  1018. bool "ARM errata: FSR write bit incorrect on a SWP to read-only memory"
  1019. depends on CPU_V6
  1020. help
  1021. Executing a SWP instruction to read-only memory does not set bit 11
  1022. of the FSR on the ARM 1136 prior to r1p0. This causes the kernel to
  1023. treat the access as a read, preventing a COW from occurring and
  1024. causing the faulting task to livelock.
  1025. config ARM_ERRATA_411920
  1026. bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
  1027. depends on CPU_V6 || CPU_V6K
  1028. help
  1029. Invalidation of the Instruction Cache operation can
  1030. fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
  1031. It does not affect the MPCore. This option enables the ARM Ltd.
  1032. recommended workaround.
  1033. config ARM_ERRATA_430973
  1034. bool "ARM errata: Stale prediction on replaced interworking branch"
  1035. depends on CPU_V7
  1036. help
  1037. This option enables the workaround for the 430973 Cortex-A8
  1038. (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
  1039. interworking branch is replaced with another code sequence at the
  1040. same virtual address, whether due to self-modifying code or virtual
  1041. to physical address re-mapping, Cortex-A8 does not recover from the
  1042. stale interworking branch prediction. This results in Cortex-A8
  1043. executing the new code sequence in the incorrect ARM or Thumb state.
  1044. The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
  1045. and also flushes the branch target cache at every context switch.
  1046. Note that setting specific bits in the ACTLR register may not be
  1047. available in non-secure mode.
  1048. config ARM_ERRATA_458693
  1049. bool "ARM errata: Processor deadlock when a false hazard is created"
  1050. depends on CPU_V7
  1051. depends on !ARCH_MULTIPLATFORM
  1052. help
  1053. This option enables the workaround for the 458693 Cortex-A8 (r2p0)
  1054. erratum. For very specific sequences of memory operations, it is
  1055. possible for a hazard condition intended for a cache line to instead
  1056. be incorrectly associated with a different cache line. This false
  1057. hazard might then cause a processor deadlock. The workaround enables
  1058. the L1 caching of the NEON accesses and disables the PLD instruction
  1059. in the ACTLR register. Note that setting specific bits in the ACTLR
  1060. register may not be available in non-secure mode.
  1061. config ARM_ERRATA_460075
  1062. bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
  1063. depends on CPU_V7
  1064. depends on !ARCH_MULTIPLATFORM
  1065. help
  1066. This option enables the workaround for the 460075 Cortex-A8 (r2p0)
  1067. erratum. Any asynchronous access to the L2 cache may encounter a
  1068. situation in which recent store transactions to the L2 cache are lost
  1069. and overwritten with stale memory contents from external memory. The
  1070. workaround disables the write-allocate mode for the L2 cache via the
  1071. ACTLR register. Note that setting specific bits in the ACTLR register
  1072. may not be available in non-secure mode.
  1073. config ARM_ERRATA_742230
  1074. bool "ARM errata: DMB operation may be faulty"
  1075. depends on CPU_V7 && SMP
  1076. depends on !ARCH_MULTIPLATFORM
  1077. help
  1078. This option enables the workaround for the 742230 Cortex-A9
  1079. (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
  1080. between two write operations may not ensure the correct visibility
  1081. ordering of the two writes. This workaround sets a specific bit in
  1082. the diagnostic register of the Cortex-A9 which causes the DMB
  1083. instruction to behave as a DSB, ensuring the correct behaviour of
  1084. the two writes.
  1085. config ARM_ERRATA_742231
  1086. bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
  1087. depends on CPU_V7 && SMP
  1088. depends on !ARCH_MULTIPLATFORM
  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. depends on !ARCH_MULTIPLATFORM
  1136. help
  1137. This option enables the workaround for the 743622 Cortex-A9
  1138. (r2p*) erratum. Under very rare conditions, a faulty
  1139. optimisation in the Cortex-A9 Store Buffer may lead to data
  1140. corruption. This workaround sets a specific bit in the diagnostic
  1141. register of the Cortex-A9 which disables the Store Buffer
  1142. optimisation, preventing the defect from occurring. This has no
  1143. visible impact on the overall performance or power consumption of the
  1144. processor.
  1145. config ARM_ERRATA_751472
  1146. bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
  1147. depends on CPU_V7
  1148. depends on !ARCH_MULTIPLATFORM
  1149. help
  1150. This option enables the workaround for the 751472 Cortex-A9 (prior
  1151. to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
  1152. completion of a following broadcasted operation if the second
  1153. operation is received by a CPU before the ICIALLUIS has completed,
  1154. potentially leading to corrupted entries in the cache or TLB.
  1155. config PL310_ERRATA_753970
  1156. bool "PL310 errata: cache sync operation may be faulty"
  1157. depends on CACHE_PL310
  1158. help
  1159. This option enables the workaround for the 753970 PL310 (r3p0) erratum.
  1160. Under some condition the effect of cache sync operation on
  1161. the store buffer still remains when the operation completes.
  1162. This means that the store buffer is always asked to drain and
  1163. this prevents it from merging any further writes. The workaround
  1164. is to replace the normal offset of cache sync operation (0x730)
  1165. by another offset targeting an unmapped PL310 register 0x740.
  1166. This has the same effect as the cache sync operation: store buffer
  1167. drain and waiting for all buffers empty.
  1168. config ARM_ERRATA_754322
  1169. bool "ARM errata: possible faulty MMU translations following an ASID switch"
  1170. depends on CPU_V7
  1171. help
  1172. This option enables the workaround for the 754322 Cortex-A9 (r2p*,
  1173. r3p*) erratum. A speculative memory access may cause a page table walk
  1174. which starts prior to an ASID switch but completes afterwards. This
  1175. can populate the micro-TLB with a stale entry which may be hit with
  1176. the new ASID. This workaround places two dsb instructions in the mm
  1177. switching code so that no page table walks can cross the ASID switch.
  1178. config ARM_ERRATA_754327
  1179. bool "ARM errata: no automatic Store Buffer drain"
  1180. depends on CPU_V7 && SMP
  1181. help
  1182. This option enables the workaround for the 754327 Cortex-A9 (prior to
  1183. r2p0) erratum. The Store Buffer does not have any automatic draining
  1184. mechanism and therefore a livelock may occur if an external agent
  1185. continuously polls a memory location waiting to observe an update.
  1186. This workaround defines cpu_relax() as smp_mb(), preventing correctly
  1187. written polling loops from denying visibility of updates to memory.
  1188. config ARM_ERRATA_364296
  1189. bool "ARM errata: Possible cache data corruption with hit-under-miss enabled"
  1190. depends on CPU_V6 && !SMP
  1191. help
  1192. This options enables the workaround for the 364296 ARM1136
  1193. r0p2 erratum (possible cache data corruption with
  1194. hit-under-miss enabled). It sets the undocumented bit 31 in
  1195. the auxiliary control register and the FI bit in the control
  1196. register, thus disabling hit-under-miss without putting the
  1197. processor into full low interrupt latency mode. ARM11MPCore
  1198. is not affected.
  1199. config ARM_ERRATA_764369
  1200. bool "ARM errata: Data cache line maintenance operation by MVA may not succeed"
  1201. depends on CPU_V7 && SMP
  1202. help
  1203. This option enables the workaround for erratum 764369
  1204. affecting Cortex-A9 MPCore with two or more processors (all
  1205. current revisions). Under certain timing circumstances, a data
  1206. cache line maintenance operation by MVA targeting an Inner
  1207. Shareable memory region may fail to proceed up to either the
  1208. Point of Coherency or to the Point of Unification of the
  1209. system. This workaround adds a DSB instruction before the
  1210. relevant cache maintenance functions and sets a specific bit
  1211. in the diagnostic control register of the SCU.
  1212. config PL310_ERRATA_769419
  1213. bool "PL310 errata: no automatic Store Buffer drain"
  1214. depends on CACHE_L2X0
  1215. help
  1216. On revisions of the PL310 prior to r3p2, the Store Buffer does
  1217. not automatically drain. This can cause normal, non-cacheable
  1218. writes to be retained when the memory system is idle, leading
  1219. to suboptimal I/O performance for drivers using coherent DMA.
  1220. This option adds a write barrier to the cpu_idle loop so that,
  1221. on systems with an outer cache, the store buffer is drained
  1222. explicitly.
  1223. config ARM_ERRATA_775420
  1224. bool "ARM errata: A data cache maintenance operation which aborts, might lead to deadlock"
  1225. depends on CPU_V7
  1226. help
  1227. This option enables the workaround for the 775420 Cortex-A9 (r2p2,
  1228. r2p6,r2p8,r2p10,r3p0) erratum. In case a date cache maintenance
  1229. operation aborts with MMU exception, it might cause the processor
  1230. to deadlock. This workaround puts DSB before executing ISB if
  1231. an abort may occur on cache maintenance.
  1232. endmenu
  1233. source "arch/arm/common/Kconfig"
  1234. menu "Bus support"
  1235. config ARM_AMBA
  1236. bool
  1237. config ISA
  1238. bool
  1239. help
  1240. Find out whether you have ISA slots on your motherboard. ISA is the
  1241. name of a bus system, i.e. the way the CPU talks to the other stuff
  1242. inside your box. Other bus systems are PCI, EISA, MicroChannel
  1243. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  1244. newer boards don't support it. If you have ISA, say Y, otherwise N.
  1245. # Select ISA DMA controller support
  1246. config ISA_DMA
  1247. bool
  1248. select ISA_DMA_API
  1249. # Select ISA DMA interface
  1250. config ISA_DMA_API
  1251. bool
  1252. config PCI
  1253. bool "PCI support" if MIGHT_HAVE_PCI
  1254. help
  1255. Find out whether you have a PCI motherboard. PCI is the name of a
  1256. bus system, i.e. the way the CPU talks to the other stuff inside
  1257. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  1258. VESA. If you have PCI, say Y, otherwise N.
  1259. config PCI_DOMAINS
  1260. bool
  1261. depends on PCI
  1262. config PCI_NANOENGINE
  1263. bool "BSE nanoEngine PCI support"
  1264. depends on SA1100_NANOENGINE
  1265. help
  1266. Enable PCI on the BSE nanoEngine board.
  1267. config PCI_SYSCALL
  1268. def_bool PCI
  1269. # Select the host bridge type
  1270. config PCI_HOST_VIA82C505
  1271. bool
  1272. depends on PCI && ARCH_SHARK
  1273. default y
  1274. config PCI_HOST_ITE8152
  1275. bool
  1276. depends on PCI && MACH_ARMCORE
  1277. default y
  1278. select DMABOUNCE
  1279. source "drivers/pci/Kconfig"
  1280. source "drivers/pcmcia/Kconfig"
  1281. endmenu
  1282. menu "Kernel Features"
  1283. config HAVE_SMP
  1284. bool
  1285. help
  1286. This option should be selected by machines which have an SMP-
  1287. capable CPU.
  1288. The only effect of this option is to make the SMP-related
  1289. options available to the user for configuration.
  1290. config SMP
  1291. bool "Symmetric Multi-Processing"
  1292. depends on CPU_V6K || CPU_V7
  1293. depends on GENERIC_CLOCKEVENTS
  1294. depends on HAVE_SMP
  1295. depends on MMU
  1296. select HAVE_ARM_SCU if !ARCH_MSM_SCORPIONMP
  1297. select USE_GENERIC_SMP_HELPERS
  1298. help
  1299. This enables support for systems with more than one CPU. If you have
  1300. a system with only one CPU, like most personal computers, say N. If
  1301. you have a system with more than one CPU, say Y.
  1302. If you say N here, the kernel will run on single and multiprocessor
  1303. machines, but will use only one CPU of a multiprocessor machine. If
  1304. you say Y here, the kernel will run on many, but not all, single
  1305. processor machines. On a single processor machine, the kernel will
  1306. run faster if you say N here.
  1307. See also <file:Documentation/x86/i386/IO-APIC.txt>,
  1308. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  1309. <http://tldp.org/HOWTO/SMP-HOWTO.html>.
  1310. If you don't know what to do here, say N.
  1311. config SMP_ON_UP
  1312. bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
  1313. depends on EXPERIMENTAL
  1314. depends on SMP && !XIP_KERNEL
  1315. default y
  1316. help
  1317. SMP kernels contain instructions which fail on non-SMP processors.
  1318. Enabling this option allows the kernel to modify itself to make
  1319. these instructions safe. Disabling it allows about 1K of space
  1320. savings.
  1321. If you don't know what to do here, say Y.
  1322. config ARM_CPU_TOPOLOGY
  1323. bool "Support cpu topology definition"
  1324. depends on SMP && CPU_V7
  1325. default y
  1326. help
  1327. Support ARM cpu topology definition. The MPIDR register defines
  1328. affinity between processors which is then used to describe the cpu
  1329. topology of an ARM System.
  1330. config SCHED_MC
  1331. bool "Multi-core scheduler support"
  1332. depends on ARM_CPU_TOPOLOGY
  1333. help
  1334. Multi-core scheduler support improves the CPU scheduler's decision
  1335. making when dealing with multi-core CPU chips at a cost of slightly
  1336. increased overhead in some places. If unsure say N here.
  1337. config SCHED_SMT
  1338. bool "SMT scheduler support"
  1339. depends on ARM_CPU_TOPOLOGY
  1340. help
  1341. Improves the CPU scheduler's decision making when dealing with
  1342. MultiThreading at a cost of slightly increased overhead in some
  1343. places. If unsure say N here.
  1344. config HAVE_ARM_SCU
  1345. bool
  1346. help
  1347. This option enables support for the ARM system coherency unit
  1348. config ARM_ARCH_TIMER
  1349. bool "Architected timer support"
  1350. depends on CPU_V7
  1351. help
  1352. This option enables support for the ARM architected timer
  1353. config HAVE_ARM_TWD
  1354. bool
  1355. depends on SMP
  1356. help
  1357. This options enables support for the ARM timer and watchdog unit
  1358. choice
  1359. prompt "Memory split"
  1360. default VMSPLIT_3G
  1361. help
  1362. Select the desired split between kernel and user memory.
  1363. If you are not absolutely sure what you are doing, leave this
  1364. option alone!
  1365. config VMSPLIT_3G
  1366. bool "3G/1G user/kernel split"
  1367. config VMSPLIT_2G
  1368. bool "2G/2G user/kernel split"
  1369. config VMSPLIT_1G
  1370. bool "1G/3G user/kernel split"
  1371. endchoice
  1372. config PAGE_OFFSET
  1373. hex
  1374. default 0x40000000 if VMSPLIT_1G
  1375. default 0x80000000 if VMSPLIT_2G
  1376. default 0xC0000000
  1377. config NR_CPUS
  1378. int "Maximum number of CPUs (2-32)"
  1379. range 2 32
  1380. depends on SMP
  1381. default "4"
  1382. config HOTPLUG_CPU
  1383. bool "Support for hot-pluggable CPUs"
  1384. depends on SMP && HOTPLUG
  1385. help
  1386. Say Y here to experiment with turning CPUs off and on. CPUs
  1387. can be controlled through /sys/devices/system/cpu.
  1388. config ARM_PSCI
  1389. bool "Support for the ARM Power State Coordination Interface (PSCI)"
  1390. depends on CPU_V7
  1391. help
  1392. Say Y here if you want Linux to communicate with system firmware
  1393. implementing the PSCI specification for CPU-centric power
  1394. management operations described in ARM document number ARM DEN
  1395. 0022A ("Power State Coordination Interface System Software on
  1396. ARM processors").
  1397. config LOCAL_TIMERS
  1398. bool "Use local timer interrupts"
  1399. depends on SMP
  1400. default y
  1401. select HAVE_ARM_TWD if (!ARCH_MSM_SCORPIONMP && !EXYNOS4_MCT)
  1402. help
  1403. Enable support for local timers on SMP platforms, rather then the
  1404. legacy IPI broadcast method. Local timers allows the system
  1405. accounting to be spread across the timer interval, preventing a
  1406. "thundering herd" at every timer tick.
  1407. config ARCH_NR_GPIO
  1408. int
  1409. default 1024 if ARCH_SHMOBILE || ARCH_TEGRA
  1410. default 355 if ARCH_U8500
  1411. default 264 if MACH_H4700
  1412. default 512 if SOC_OMAP5
  1413. default 288 if ARCH_VT8500 || ARCH_SUNXI
  1414. default 0
  1415. help
  1416. Maximum number of GPIOs in the system.
  1417. If unsure, leave the default value.
  1418. source kernel/Kconfig.preempt
  1419. config HZ
  1420. int
  1421. default 200 if ARCH_EBSA110 || ARCH_S3C24XX || ARCH_S5P64X0 || \
  1422. ARCH_S5PV210 || ARCH_EXYNOS4
  1423. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  1424. default AT91_TIMER_HZ if ARCH_AT91
  1425. default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
  1426. default 100
  1427. config SCHED_HRTICK
  1428. def_bool HIGH_RES_TIMERS
  1429. config THUMB2_KERNEL
  1430. bool "Compile the kernel in Thumb-2 mode"
  1431. depends on CPU_V7 && !CPU_V6 && !CPU_V6K
  1432. select AEABI
  1433. select ARM_ASM_UNIFIED
  1434. select ARM_UNWIND
  1435. help
  1436. By enabling this option, the kernel will be compiled in
  1437. Thumb-2 mode. A compiler/assembler that understand the unified
  1438. ARM-Thumb syntax is needed.
  1439. If unsure, say N.
  1440. config THUMB2_AVOID_R_ARM_THM_JUMP11
  1441. bool "Work around buggy Thumb-2 short branch relocations in gas"
  1442. depends on THUMB2_KERNEL && MODULES
  1443. default y
  1444. help
  1445. Various binutils versions can resolve Thumb-2 branches to
  1446. locally-defined, preemptible global symbols as short-range "b.n"
  1447. branch instructions.
  1448. This is a problem, because there's no guarantee the final
  1449. destination of the symbol, or any candidate locations for a
  1450. trampoline, are within range of the branch. For this reason, the
  1451. kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
  1452. relocation in modules at all, and it makes little sense to add
  1453. support.
  1454. The symptom is that the kernel fails with an "unsupported
  1455. relocation" error when loading some modules.
  1456. Until fixed tools are available, passing
  1457. -fno-optimize-sibling-calls to gcc should prevent gcc generating
  1458. code which hits this problem, at the cost of a bit of extra runtime
  1459. stack usage in some cases.
  1460. The problem is described in more detail at:
  1461. https://bugs.launchpad.net/binutils-linaro/+bug/725126
  1462. Only Thumb-2 kernels are affected.
  1463. Unless you are sure your tools don't have this problem, say Y.
  1464. config ARM_ASM_UNIFIED
  1465. bool
  1466. config AEABI
  1467. bool "Use the ARM EABI to compile the kernel"
  1468. help
  1469. This option allows for the kernel to be compiled using the latest
  1470. ARM ABI (aka EABI). This is only useful if you are using a user
  1471. space environment that is also compiled with EABI.
  1472. Since there are major incompatibilities between the legacy ABI and
  1473. EABI, especially with regard to structure member alignment, this
  1474. option also changes the kernel syscall calling convention to
  1475. disambiguate both ABIs and allow for backward compatibility support
  1476. (selected with CONFIG_OABI_COMPAT).
  1477. To use this you need GCC version 4.0.0 or later.
  1478. config OABI_COMPAT
  1479. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  1480. depends on AEABI && EXPERIMENTAL && !THUMB2_KERNEL
  1481. default y
  1482. help
  1483. This option preserves the old syscall interface along with the
  1484. new (ARM EABI) one. It also provides a compatibility layer to
  1485. intercept syscalls that have structure arguments which layout
  1486. in memory differs between the legacy ABI and the new ARM EABI
  1487. (only for non "thumb" binaries). This option adds a tiny
  1488. overhead to all syscalls and produces a slightly larger kernel.
  1489. If you know you'll be using only pure EABI user space then you
  1490. can say N here. If this option is not selected and you attempt
  1491. to execute a legacy ABI binary then the result will be
  1492. UNPREDICTABLE (in fact it can be predicted that it won't work
  1493. at all). If in doubt say Y.
  1494. config ARCH_HAS_HOLES_MEMORYMODEL
  1495. bool
  1496. config ARCH_SPARSEMEM_ENABLE
  1497. bool
  1498. config ARCH_SPARSEMEM_DEFAULT
  1499. def_bool ARCH_SPARSEMEM_ENABLE
  1500. config ARCH_SELECT_MEMORY_MODEL
  1501. def_bool ARCH_SPARSEMEM_ENABLE
  1502. config HAVE_ARCH_PFN_VALID
  1503. def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
  1504. config HIGHMEM
  1505. bool "High Memory Support"
  1506. depends on MMU
  1507. help
  1508. The address space of ARM processors is only 4 Gigabytes large
  1509. and it has to accommodate user address space, kernel address
  1510. space as well as some memory mapped IO. That means that, if you
  1511. have a large amount of physical memory and/or IO, not all of the
  1512. memory can be "permanently mapped" by the kernel. The physical
  1513. memory that is not permanently mapped is called "high memory".
  1514. Depending on the selected kernel/user memory split, minimum
  1515. vmalloc space and actual amount of RAM, you may not need this
  1516. option which should result in a slightly faster kernel.
  1517. If unsure, say n.
  1518. config HIGHPTE
  1519. bool "Allocate 2nd-level pagetables from highmem"
  1520. depends on HIGHMEM
  1521. config HW_PERF_EVENTS
  1522. bool "Enable hardware performance counter support for perf events"
  1523. depends on PERF_EVENTS
  1524. default y
  1525. help
  1526. Enable hardware performance counter support for perf events. If
  1527. disabled, perf events will use software events only.
  1528. source "mm/Kconfig"
  1529. config FORCE_MAX_ZONEORDER
  1530. int "Maximum zone order" if ARCH_SHMOBILE
  1531. range 11 64 if ARCH_SHMOBILE
  1532. default "12" if SOC_AM33XX
  1533. default "9" if SA1111
  1534. default "11"
  1535. help
  1536. The kernel memory allocator divides physically contiguous memory
  1537. blocks into "zones", where each zone is a power of two number of
  1538. pages. This option selects the largest power of two that the kernel
  1539. keeps in the memory allocator. If you need to allocate very large
  1540. blocks of physically contiguous memory, then you may need to
  1541. increase this value.
  1542. This config option is actually maximum order plus one. For example,
  1543. a value of 11 means that the largest free memory block is 2^10 pages.
  1544. config ALIGNMENT_TRAP
  1545. bool
  1546. depends on CPU_CP15_MMU
  1547. default y if !ARCH_EBSA110
  1548. select HAVE_PROC_CPU if PROC_FS
  1549. help
  1550. ARM processors cannot fetch/store information which is not
  1551. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  1552. address divisible by 4. On 32-bit ARM processors, these non-aligned
  1553. fetch/store instructions will be emulated in software if you say
  1554. here, which has a severe performance impact. This is necessary for
  1555. correct operation of some network protocols. With an IP-only
  1556. configuration it is safe to say N, otherwise say Y.
  1557. config UACCESS_WITH_MEMCPY
  1558. bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user()"
  1559. depends on MMU
  1560. default y if CPU_FEROCEON
  1561. help
  1562. Implement faster copy_to_user and clear_user methods for CPU
  1563. cores where a 8-word STM instruction give significantly higher
  1564. memory write throughput than a sequence of individual 32bit stores.
  1565. A possible side effect is a slight increase in scheduling latency
  1566. between threads sharing the same address space if they invoke
  1567. such copy operations with large buffers.
  1568. However, if the CPU data cache is using a write-allocate mode,
  1569. this option is unlikely to provide any performance gain.
  1570. config SECCOMP
  1571. bool
  1572. prompt "Enable seccomp to safely compute untrusted bytecode"
  1573. ---help---
  1574. This kernel feature is useful for number crunching applications
  1575. that may need to compute untrusted bytecode during their
  1576. execution. By using pipes or other transports made available to
  1577. the process as file descriptors supporting the read/write
  1578. syscalls, it's possible to isolate those applications in
  1579. their own address space using seccomp. Once seccomp is
  1580. enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
  1581. and the task is only allowed to execute a few safe syscalls
  1582. defined by each seccomp mode.
  1583. config CC_STACKPROTECTOR
  1584. bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
  1585. depends on EXPERIMENTAL
  1586. help
  1587. This option turns on the -fstack-protector GCC feature. This
  1588. feature puts, at the beginning of functions, a canary value on
  1589. the stack just before the return address, and validates
  1590. the value just before actually returning. Stack based buffer
  1591. overflows (that need to overwrite this return address) now also
  1592. overwrite the canary, which gets detected and the attack is then
  1593. neutralized via a kernel panic.
  1594. This feature requires gcc version 4.2 or above.
  1595. config XEN_DOM0
  1596. def_bool y
  1597. depends on XEN
  1598. config XEN
  1599. bool "Xen guest support on ARM (EXPERIMENTAL)"
  1600. depends on EXPERIMENTAL && ARM && OF
  1601. depends on CPU_V7 && !CPU_V6
  1602. help
  1603. Say Y if you want to run Linux in a Virtual Machine on Xen on ARM.
  1604. endmenu
  1605. menu "Boot options"
  1606. config USE_OF
  1607. bool "Flattened Device Tree support"
  1608. select IRQ_DOMAIN
  1609. select OF
  1610. select OF_EARLY_FLATTREE
  1611. help
  1612. Include support for flattened device tree machine descriptions.
  1613. config ATAGS
  1614. bool "Support for the traditional ATAGS boot data passing" if USE_OF
  1615. default y
  1616. help
  1617. This is the traditional way of passing data to the kernel at boot
  1618. time. If you are solely relying on the flattened device tree (or
  1619. the ARM_ATAG_DTB_COMPAT option) then you may unselect this option
  1620. to remove ATAGS support from your kernel binary. If unsure,
  1621. leave this to y.
  1622. config DEPRECATED_PARAM_STRUCT
  1623. bool "Provide old way to pass kernel parameters"
  1624. depends on ATAGS
  1625. help
  1626. This was deprecated in 2001 and announced to live on for 5 years.
  1627. Some old boot loaders still use this way.
  1628. # Compressed boot loader in ROM. Yes, we really want to ask about
  1629. # TEXT and BSS so we preserve their values in the config files.
  1630. config ZBOOT_ROM_TEXT
  1631. hex "Compressed ROM boot loader base address"
  1632. default "0"
  1633. help
  1634. The physical address at which the ROM-able zImage is to be
  1635. placed in the target. Platforms which normally make use of
  1636. ROM-able zImage formats normally set this to a suitable
  1637. value in their defconfig file.
  1638. If ZBOOT_ROM is not enabled, this has no effect.
  1639. config ZBOOT_ROM_BSS
  1640. hex "Compressed ROM boot loader BSS address"
  1641. default "0"
  1642. help
  1643. The base address of an area of read/write memory in the target
  1644. for the ROM-able zImage which must be available while the
  1645. decompressor is running. It must be large enough to hold the
  1646. entire decompressed kernel plus an additional 128 KiB.
  1647. Platforms which normally make use of ROM-able zImage formats
  1648. normally set this to a suitable value in their defconfig file.
  1649. If ZBOOT_ROM is not enabled, this has no effect.
  1650. config ZBOOT_ROM
  1651. bool "Compressed boot loader in ROM/flash"
  1652. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  1653. help
  1654. Say Y here if you intend to execute your compressed kernel image
  1655. (zImage) directly from ROM or flash. If unsure, say N.
  1656. choice
  1657. prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)"
  1658. depends on ZBOOT_ROM && ARCH_SH7372 && EXPERIMENTAL
  1659. default ZBOOT_ROM_NONE
  1660. help
  1661. Include experimental SD/MMC loading code in the ROM-able zImage.
  1662. With this enabled it is possible to write the ROM-able zImage
  1663. kernel image to an MMC or SD card and boot the kernel straight
  1664. from the reset vector. At reset the processor Mask ROM will load
  1665. the first part of the ROM-able zImage which in turn loads the
  1666. rest the kernel image to RAM.
  1667. config ZBOOT_ROM_NONE
  1668. bool "No SD/MMC loader in zImage (EXPERIMENTAL)"
  1669. help
  1670. Do not load image from SD or MMC
  1671. config ZBOOT_ROM_MMCIF
  1672. bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
  1673. help
  1674. Load image from MMCIF hardware block.
  1675. config ZBOOT_ROM_SH_MOBILE_SDHI
  1676. bool "Include SuperH Mobile SDHI loader in zImage (EXPERIMENTAL)"
  1677. help
  1678. Load image from SDHI hardware block
  1679. endchoice
  1680. config ARM_APPENDED_DTB
  1681. bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
  1682. depends on OF && !ZBOOT_ROM && EXPERIMENTAL
  1683. help
  1684. With this option, the boot code will look for a device tree binary
  1685. (DTB) appended to zImage
  1686. (e.g. cat zImage <filename>.dtb > zImage_w_dtb).
  1687. This is meant as a backward compatibility convenience for those
  1688. systems with a bootloader that can't be upgraded to accommodate
  1689. the documented boot protocol using a device tree.
  1690. Beware that there is very little in terms of protection against
  1691. this option being confused by leftover garbage in memory that might
  1692. look like a DTB header after a reboot if no actual DTB is appended
  1693. to zImage. Do not leave this option active in a production kernel
  1694. if you don't intend to always append a DTB. Proper passing of the
  1695. location into r2 of a bootloader provided DTB is always preferable
  1696. to this option.
  1697. config ARM_ATAG_DTB_COMPAT
  1698. bool "Supplement the appended DTB with traditional ATAG information"
  1699. depends on ARM_APPENDED_DTB
  1700. help
  1701. Some old bootloaders can't be updated to a DTB capable one, yet
  1702. they provide ATAGs with memory configuration, the ramdisk address,
  1703. the kernel cmdline string, etc. Such information is dynamically
  1704. provided by the bootloader and can't always be stored in a static
  1705. DTB. To allow a device tree enabled kernel to be used with such
  1706. bootloaders, this option allows zImage to extract the information
  1707. from the ATAG list and store it at run time into the appended DTB.
  1708. choice
  1709. prompt "Kernel command line type" if ARM_ATAG_DTB_COMPAT
  1710. default ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
  1711. config ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
  1712. bool "Use bootloader kernel arguments if available"
  1713. help
  1714. Uses the command-line options passed by the boot loader instead of
  1715. the device tree bootargs property. If the boot loader doesn't provide
  1716. any, the device tree bootargs property will be used.
  1717. config ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEND
  1718. bool "Extend with bootloader kernel arguments"
  1719. help
  1720. The command-line arguments provided by the boot loader will be
  1721. appended to the the device tree bootargs property.
  1722. endchoice
  1723. config CMDLINE
  1724. string "Default kernel command string"
  1725. default ""
  1726. help
  1727. On some architectures (EBSA110 and CATS), there is currently no way
  1728. for the boot loader to pass arguments to the kernel. For these
  1729. architectures, you should supply some command-line options at build
  1730. time by entering them here. As a minimum, you should specify the
  1731. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  1732. choice
  1733. prompt "Kernel command line type" if CMDLINE != ""
  1734. default CMDLINE_FROM_BOOTLOADER
  1735. depends on ATAGS
  1736. config CMDLINE_FROM_BOOTLOADER
  1737. bool "Use bootloader kernel arguments if available"
  1738. help
  1739. Uses the command-line options passed by the boot loader. If
  1740. the boot loader doesn't provide any, the default kernel command
  1741. string provided in CMDLINE will be used.
  1742. config CMDLINE_EXTEND
  1743. bool "Extend bootloader kernel arguments"
  1744. help
  1745. The command-line arguments provided by the boot loader will be
  1746. appended to the default kernel command string.
  1747. config CMDLINE_FORCE
  1748. bool "Always use the default kernel command string"
  1749. help
  1750. Always use the default kernel command string, even if the boot
  1751. loader passes other arguments to the kernel.
  1752. This is useful if you cannot or don't want to change the
  1753. command-line options your boot loader passes to the kernel.
  1754. endchoice
  1755. config XIP_KERNEL
  1756. bool "Kernel Execute-In-Place from ROM"
  1757. depends on !ZBOOT_ROM && !ARM_LPAE && !ARCH_MULTIPLATFORM
  1758. help
  1759. Execute-In-Place allows the kernel to run from non-volatile storage
  1760. directly addressable by the CPU, such as NOR flash. This saves RAM
  1761. space since the text section of the kernel is not loaded from flash
  1762. to RAM. Read-write sections, such as the data section and stack,
  1763. are still copied to RAM. The XIP kernel is not compressed since
  1764. it has to run directly from flash, so it will take more space to
  1765. store it. The flash address used to link the kernel object files,
  1766. and for storing it, is configuration dependent. Therefore, if you
  1767. say Y here, you must know the proper physical address where to
  1768. store the kernel image depending on your own flash memory usage.
  1769. Also note that the make target becomes "make xipImage" rather than
  1770. "make zImage" or "make Image". The final kernel binary to put in
  1771. ROM memory will be arch/arm/boot/xipImage.
  1772. If unsure, say N.
  1773. config XIP_PHYS_ADDR
  1774. hex "XIP Kernel Physical Location"
  1775. depends on XIP_KERNEL
  1776. default "0x00080000"
  1777. help
  1778. This is the physical address in your flash memory the kernel will
  1779. be linked for and stored to. This address is dependent on your
  1780. own flash usage.
  1781. config KEXEC
  1782. bool "Kexec system call (EXPERIMENTAL)"
  1783. depends on EXPERIMENTAL && (!SMP || HOTPLUG_CPU)
  1784. help
  1785. kexec is a system call that implements the ability to shutdown your
  1786. current kernel, and to start another kernel. It is like a reboot
  1787. but it is independent of the system firmware. And like a reboot
  1788. you can start any kernel with it, not just Linux.
  1789. It is an ongoing process to be certain the hardware in a machine
  1790. is properly shutdown, so do not be surprised if this code does not
  1791. initially work for you. It may help to enable device hotplugging
  1792. support.
  1793. config ATAGS_PROC
  1794. bool "Export atags in procfs"
  1795. depends on ATAGS && KEXEC
  1796. default y
  1797. help
  1798. Should the atags used to boot the kernel be exported in an "atags"
  1799. file in procfs. Useful with kexec.
  1800. config CRASH_DUMP
  1801. bool "Build kdump crash kernel (EXPERIMENTAL)"
  1802. depends on EXPERIMENTAL
  1803. help
  1804. Generate crash dump after being started by kexec. This should
  1805. be normally only set in special crash dump kernels which are
  1806. loaded in the main kernel with kexec-tools into a specially
  1807. reserved region and then later executed after a crash by
  1808. kdump/kexec. The crash dump kernel must be compiled to a
  1809. memory address not used by the main kernel
  1810. For more details see Documentation/kdump/kdump.txt
  1811. config AUTO_ZRELADDR
  1812. bool "Auto calculation of the decompressed kernel image address"
  1813. depends on !ZBOOT_ROM && !ARCH_U300
  1814. help
  1815. ZRELADDR is the physical address where the decompressed kernel
  1816. image will be placed. If AUTO_ZRELADDR is selected, the address
  1817. will be determined at run-time by masking the current IP with
  1818. 0xf8000000. This assumes the zImage being placed in the first 128MB
  1819. from start of memory.
  1820. endmenu
  1821. menu "CPU Power Management"
  1822. if ARCH_HAS_CPUFREQ
  1823. source "drivers/cpufreq/Kconfig"
  1824. config CPU_FREQ_IMX
  1825. tristate "CPUfreq driver for i.MX CPUs"
  1826. depends on ARCH_MXC && CPU_FREQ
  1827. select CPU_FREQ_TABLE
  1828. help
  1829. This enables the CPUfreq driver for i.MX CPUs.
  1830. config CPU_FREQ_SA1100
  1831. bool
  1832. config CPU_FREQ_SA1110
  1833. bool
  1834. config CPU_FREQ_INTEGRATOR
  1835. tristate "CPUfreq driver for ARM Integrator CPUs"
  1836. depends on ARCH_INTEGRATOR && CPU_FREQ
  1837. default y
  1838. help
  1839. This enables the CPUfreq driver for ARM Integrator CPUs.
  1840. For details, take a look at <file:Documentation/cpu-freq>.
  1841. If in doubt, say Y.
  1842. config CPU_FREQ_PXA
  1843. bool
  1844. depends on CPU_FREQ && ARCH_PXA && PXA25x
  1845. default y
  1846. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  1847. select CPU_FREQ_TABLE
  1848. config CPU_FREQ_S3C
  1849. bool
  1850. help
  1851. Internal configuration node for common cpufreq on Samsung SoC
  1852. config CPU_FREQ_S3C24XX
  1853. bool "CPUfreq driver for Samsung S3C24XX series CPUs (EXPERIMENTAL)"
  1854. depends on ARCH_S3C24XX && CPU_FREQ && EXPERIMENTAL
  1855. select CPU_FREQ_S3C
  1856. help
  1857. This enables the CPUfreq driver for the Samsung S3C24XX family
  1858. of CPUs.
  1859. For details, take a look at <file:Documentation/cpu-freq>.
  1860. If in doubt, say N.
  1861. config CPU_FREQ_S3C24XX_PLL
  1862. bool "Support CPUfreq changing of PLL frequency (EXPERIMENTAL)"
  1863. depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
  1864. help
  1865. Compile in support for changing the PLL frequency from the
  1866. S3C24XX series CPUfreq driver. The PLL takes time to settle
  1867. after a frequency change, so by default it is not enabled.
  1868. This also means that the PLL tables for the selected CPU(s) will
  1869. be built which may increase the size of the kernel image.
  1870. config CPU_FREQ_S3C24XX_DEBUG
  1871. bool "Debug CPUfreq Samsung driver core"
  1872. depends on CPU_FREQ_S3C24XX
  1873. help
  1874. Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
  1875. config CPU_FREQ_S3C24XX_IODEBUG
  1876. bool "Debug CPUfreq Samsung driver IO timing"
  1877. depends on CPU_FREQ_S3C24XX
  1878. help
  1879. Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
  1880. config CPU_FREQ_S3C24XX_DEBUGFS
  1881. bool "Export debugfs for CPUFreq"
  1882. depends on CPU_FREQ_S3C24XX && DEBUG_FS
  1883. help
  1884. Export status information via debugfs.
  1885. endif
  1886. source "drivers/cpuidle/Kconfig"
  1887. endmenu
  1888. menu "Floating point emulation"
  1889. comment "At least one emulation must be selected"
  1890. config FPE_NWFPE
  1891. bool "NWFPE math emulation"
  1892. depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
  1893. ---help---
  1894. Say Y to include the NWFPE floating point emulator in the kernel.
  1895. This is necessary to run most binaries. Linux does not currently
  1896. support floating point hardware so you need to say Y here even if
  1897. your machine has an FPA or floating point co-processor podule.
  1898. You may say N here if you are going to load the Acorn FPEmulator
  1899. early in the bootup.
  1900. config FPE_NWFPE_XP
  1901. bool "Support extended precision"
  1902. depends on FPE_NWFPE
  1903. help
  1904. Say Y to include 80-bit support in the kernel floating-point
  1905. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  1906. Note that gcc does not generate 80-bit operations by default,
  1907. so in most cases this option only enlarges the size of the
  1908. floating point emulator without any good reason.
  1909. You almost surely want to say N here.
  1910. config FPE_FASTFPE
  1911. bool "FastFPE math emulation (EXPERIMENTAL)"
  1912. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  1913. ---help---
  1914. Say Y here to include the FAST floating point emulator in the kernel.
  1915. This is an experimental much faster emulator which now also has full
  1916. precision for the mantissa. It does not support any exceptions.
  1917. It is very simple, and approximately 3-6 times faster than NWFPE.
  1918. It should be sufficient for most programs. It may be not suitable
  1919. for scientific calculations, but you have to check this for yourself.
  1920. If you do not feel you need a faster FP emulation you should better
  1921. choose NWFPE.
  1922. config VFP
  1923. bool "VFP-format floating point maths"
  1924. depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  1925. help
  1926. Say Y to include VFP support code in the kernel. This is needed
  1927. if your hardware includes a VFP unit.
  1928. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  1929. release notes and additional status information.
  1930. Say N if your target does not have VFP hardware.
  1931. config VFPv3
  1932. bool
  1933. depends on VFP
  1934. default y if CPU_V7
  1935. config NEON
  1936. bool "Advanced SIMD (NEON) Extension support"
  1937. depends on VFPv3 && CPU_V7
  1938. help
  1939. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  1940. Extension.
  1941. endmenu
  1942. menu "Userspace binary formats"
  1943. source "fs/Kconfig.binfmt"
  1944. config ARTHUR
  1945. tristate "RISC OS personality"
  1946. depends on !AEABI
  1947. help
  1948. Say Y here to include the kernel code necessary if you want to run
  1949. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  1950. experimental; if this sounds frightening, say N and sleep in peace.
  1951. You can also say M here to compile this support as a module (which
  1952. will be called arthur).
  1953. endmenu
  1954. menu "Power management options"
  1955. source "kernel/power/Kconfig"
  1956. config ARCH_SUSPEND_POSSIBLE
  1957. depends on !ARCH_S5PC100
  1958. depends on CPU_ARM920T || CPU_ARM926T || CPU_SA1100 || \
  1959. CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE || CPU_MOHAWK
  1960. def_bool y
  1961. config ARM_CPU_SUSPEND
  1962. def_bool PM_SLEEP
  1963. endmenu
  1964. source "net/Kconfig"
  1965. source "drivers/Kconfig"
  1966. source "fs/Kconfig"
  1967. source "arch/arm/Kconfig.debug"
  1968. source "security/Kconfig"
  1969. source "crypto/Kconfig"
  1970. source "lib/Kconfig"
  1971. source "arch/arm/kvm/Kconfig"