Kconfig 65 KB

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  1. config ARM
  2. bool
  3. default y
  4. select ARCH_HAVE_CUSTOM_GPIO_H
  5. select HAVE_AOUT
  6. select HAVE_DMA_API_DEBUG
  7. select HAVE_IDE if PCI || ISA || PCMCIA
  8. select HAVE_DMA_ATTRS
  9. select HAVE_DMA_CONTIGUOUS if MMU
  10. select HAVE_MEMBLOCK
  11. select RTC_LIB
  12. select SYS_SUPPORTS_APM_EMULATION
  13. select GENERIC_ATOMIC64 if (CPU_V6 || !CPU_32v6K || !AEABI)
  14. select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
  15. select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
  16. select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL
  17. select HAVE_ARCH_KGDB
  18. select HAVE_ARCH_TRACEHOOK
  19. select HAVE_SYSCALL_TRACEPOINTS
  20. select HAVE_KPROBES if !XIP_KERNEL
  21. select HAVE_KRETPROBES if (HAVE_KPROBES)
  22. select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
  23. select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
  24. select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL)
  25. select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL)
  26. select ARCH_BINFMT_ELF_RANDOMIZE_PIE
  27. select HAVE_GENERIC_DMA_COHERENT
  28. select HAVE_DEBUG_KMEMLEAK
  29. select HAVE_KERNEL_GZIP
  30. select HAVE_KERNEL_LZO
  31. select HAVE_KERNEL_LZMA
  32. select HAVE_KERNEL_XZ
  33. select HAVE_IRQ_WORK
  34. select HAVE_PERF_EVENTS
  35. select PERF_USE_VMALLOC
  36. select HAVE_REGS_AND_STACK_ACCESS_API
  37. select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7))
  38. select HAVE_C_RECORDMCOUNT
  39. select HAVE_GENERIC_HARDIRQS
  40. select HARDIRQS_SW_RESEND
  41. select GENERIC_IRQ_PROBE
  42. select GENERIC_IRQ_SHOW
  43. select HAVE_UID16
  44. select ARCH_WANT_IPC_PARSE_VERSION
  45. select HARDIRQS_SW_RESEND
  46. select CPU_PM if (SUSPEND || CPU_IDLE)
  47. select GENERIC_PCI_IOMAP
  48. select HAVE_BPF_JIT
  49. select GENERIC_SMP_IDLE_THREAD
  50. select KTIME_SCALAR
  51. select GENERIC_CLOCKEVENTS_BROADCAST if SMP
  52. select GENERIC_STRNCPY_FROM_USER
  53. select GENERIC_STRNLEN_USER
  54. select DCACHE_WORD_ACCESS if (CPU_V6 || CPU_V6K || CPU_V7) && !CPU_BIG_ENDIAN
  55. help
  56. The ARM series is a line of low-power-consumption RISC chip designs
  57. licensed by ARM Ltd and targeted at embedded applications and
  58. handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
  59. manufactured, but legacy ARM-based PC hardware remains popular in
  60. Europe. There is an ARM Linux project with a web page at
  61. <http://www.arm.linux.org.uk/>.
  62. config ARM_HAS_SG_CHAIN
  63. bool
  64. config NEED_SG_DMA_LENGTH
  65. bool
  66. config ARM_DMA_USE_IOMMU
  67. select NEED_SG_DMA_LENGTH
  68. select ARM_HAS_SG_CHAIN
  69. bool
  70. config HAVE_PWM
  71. bool
  72. config MIGHT_HAVE_PCI
  73. bool
  74. config SYS_SUPPORTS_APM_EMULATION
  75. bool
  76. config GENERIC_GPIO
  77. bool
  78. config HAVE_TCM
  79. bool
  80. select GENERIC_ALLOCATOR
  81. config HAVE_PROC_CPU
  82. bool
  83. config NO_IOPORT
  84. bool
  85. config EISA
  86. bool
  87. ---help---
  88. The Extended Industry Standard Architecture (EISA) bus was
  89. developed as an open alternative to the IBM MicroChannel bus.
  90. The EISA bus provided some of the features of the IBM MicroChannel
  91. bus while maintaining backward compatibility with cards made for
  92. the older ISA bus. The EISA bus saw limited use between 1988 and
  93. 1995 when it was made obsolete by the PCI bus.
  94. Say Y here if you are building a kernel for an EISA-based machine.
  95. Otherwise, say N.
  96. config SBUS
  97. bool
  98. config STACKTRACE_SUPPORT
  99. bool
  100. default y
  101. config HAVE_LATENCYTOP_SUPPORT
  102. bool
  103. depends on !SMP
  104. default y
  105. config LOCKDEP_SUPPORT
  106. bool
  107. default y
  108. config TRACE_IRQFLAGS_SUPPORT
  109. bool
  110. default y
  111. config RWSEM_GENERIC_SPINLOCK
  112. bool
  113. default y
  114. config RWSEM_XCHGADD_ALGORITHM
  115. bool
  116. config ARCH_HAS_ILOG2_U32
  117. bool
  118. config ARCH_HAS_ILOG2_U64
  119. bool
  120. config ARCH_HAS_CPUFREQ
  121. bool
  122. help
  123. Internal node to signify that the ARCH has CPUFREQ support
  124. and that the relevant menu configurations are displayed for
  125. it.
  126. config GENERIC_HWEIGHT
  127. bool
  128. default y
  129. config GENERIC_CALIBRATE_DELAY
  130. bool
  131. default y
  132. config ARCH_MAY_HAVE_PC_FDC
  133. bool
  134. config ZONE_DMA
  135. bool
  136. config NEED_DMA_MAP_STATE
  137. def_bool y
  138. config ARCH_HAS_DMA_SET_COHERENT_MASK
  139. bool
  140. config GENERIC_ISA_DMA
  141. bool
  142. config FIQ
  143. bool
  144. config NEED_RET_TO_USER
  145. bool
  146. config ARCH_MTD_XIP
  147. bool
  148. config VECTORS_BASE
  149. hex
  150. default 0xffff0000 if MMU || CPU_HIGH_VECTOR
  151. default DRAM_BASE if REMAP_VECTORS_TO_RAM
  152. default 0x00000000
  153. help
  154. The base address of exception vectors.
  155. config ARM_PATCH_PHYS_VIRT
  156. bool "Patch physical to virtual translations at runtime" if EMBEDDED
  157. default y
  158. depends on !XIP_KERNEL && MMU
  159. depends on !ARCH_REALVIEW || !SPARSEMEM
  160. help
  161. Patch phys-to-virt and virt-to-phys translation functions at
  162. boot and module load time according to the position of the
  163. kernel in system memory.
  164. This can only be used with non-XIP MMU kernels where the base
  165. of physical memory is at a 16MB boundary.
  166. Only disable this option if you know that you do not require
  167. this feature (eg, building a kernel for a single machine) and
  168. you need to shrink the kernel to the minimal size.
  169. config NEED_MACH_GPIO_H
  170. bool
  171. help
  172. Select this when mach/gpio.h is required to provide special
  173. definitions for this platform. The need for mach/gpio.h should
  174. be avoided when possible.
  175. config NEED_MACH_IO_H
  176. bool
  177. help
  178. Select this when mach/io.h is required to provide special
  179. definitions for this platform. The need for mach/io.h should
  180. be avoided when possible.
  181. config NEED_MACH_MEMORY_H
  182. bool
  183. help
  184. Select this when mach/memory.h is required to provide special
  185. definitions for this platform. The need for mach/memory.h should
  186. be avoided when possible.
  187. config PHYS_OFFSET
  188. hex "Physical address of main memory" if MMU
  189. depends on !ARM_PATCH_PHYS_VIRT && !NEED_MACH_MEMORY_H
  190. default DRAM_BASE if !MMU
  191. help
  192. Please provide the physical address corresponding to the
  193. location of main memory in your system.
  194. config GENERIC_BUG
  195. def_bool y
  196. depends on BUG
  197. source "init/Kconfig"
  198. source "kernel/Kconfig.freezer"
  199. menu "System Type"
  200. config MMU
  201. bool "MMU-based Paged Memory Management Support"
  202. default y
  203. help
  204. Select if you want MMU-based virtualised addressing space
  205. support by paged memory management. If unsure, say 'Y'.
  206. #
  207. # The "ARM system type" choice list is ordered alphabetically by option
  208. # text. Please add new entries in the option alphabetic order.
  209. #
  210. choice
  211. prompt "ARM system type"
  212. default ARCH_MULTIPLATFORM
  213. config ARCH_MULTIPLATFORM
  214. bool "Allow multiple platforms to be selected"
  215. select ARM_PATCH_PHYS_VIRT
  216. select AUTO_ZRELADDR
  217. select COMMON_CLK
  218. select MULTI_IRQ_HANDLER
  219. select SPARSE_IRQ
  220. select USE_OF
  221. depends on MMU
  222. config ARCH_INTEGRATOR
  223. bool "ARM Ltd. Integrator family"
  224. select ARM_AMBA
  225. select ARCH_HAS_CPUFREQ
  226. select COMMON_CLK
  227. select COMMON_CLK_VERSATILE
  228. select HAVE_TCM
  229. select ICST
  230. select GENERIC_CLOCKEVENTS
  231. select PLAT_VERSATILE
  232. select PLAT_VERSATILE_FPGA_IRQ
  233. select NEED_MACH_MEMORY_H
  234. select SPARSE_IRQ
  235. select MULTI_IRQ_HANDLER
  236. help
  237. Support for ARM's Integrator platform.
  238. config ARCH_REALVIEW
  239. bool "ARM Ltd. RealView family"
  240. select ARM_AMBA
  241. select COMMON_CLK
  242. select COMMON_CLK_VERSATILE
  243. select ICST
  244. select GENERIC_CLOCKEVENTS
  245. select ARCH_WANT_OPTIONAL_GPIOLIB
  246. select PLAT_VERSATILE
  247. select PLAT_VERSATILE_CLCD
  248. select ARM_TIMER_SP804
  249. select GPIO_PL061 if GPIOLIB
  250. select NEED_MACH_MEMORY_H
  251. help
  252. This enables support for ARM Ltd RealView boards.
  253. config ARCH_VERSATILE
  254. bool "ARM Ltd. Versatile family"
  255. select ARM_AMBA
  256. select ARM_VIC
  257. select CLKDEV_LOOKUP
  258. select HAVE_MACH_CLKDEV
  259. select ICST
  260. select GENERIC_CLOCKEVENTS
  261. select ARCH_WANT_OPTIONAL_GPIOLIB
  262. select PLAT_VERSATILE
  263. select PLAT_VERSATILE_CLOCK
  264. select PLAT_VERSATILE_CLCD
  265. select PLAT_VERSATILE_FPGA_IRQ
  266. select ARM_TIMER_SP804
  267. help
  268. This enables support for ARM Ltd Versatile board.
  269. config ARCH_AT91
  270. bool "Atmel AT91"
  271. select ARCH_REQUIRE_GPIOLIB
  272. select HAVE_CLK
  273. select CLKDEV_LOOKUP
  274. select IRQ_DOMAIN
  275. select NEED_MACH_GPIO_H
  276. select NEED_MACH_IO_H if PCCARD
  277. help
  278. This enables support for systems based on Atmel
  279. AT91RM9200 and AT91SAM9* processors.
  280. config ARCH_BCM2835
  281. bool "Broadcom BCM2835 family"
  282. select ARCH_WANT_OPTIONAL_GPIOLIB
  283. select ARM_AMBA
  284. select ARM_ERRATA_411920
  285. select ARM_TIMER_SP804
  286. select CLKDEV_LOOKUP
  287. select COMMON_CLK
  288. select CPU_V6
  289. select GENERIC_CLOCKEVENTS
  290. select MULTI_IRQ_HANDLER
  291. select SPARSE_IRQ
  292. select USE_OF
  293. help
  294. This enables support for the Broadcom BCM2835 SoC. This SoC is
  295. use in the Raspberry Pi, and Roku 2 devices.
  296. config ARCH_CLPS711X
  297. bool "Cirrus Logic CLPS711x/EP721x/EP731x-based"
  298. select CPU_ARM720T
  299. select ARCH_USES_GETTIMEOFFSET
  300. select COMMON_CLK
  301. select CLKDEV_LOOKUP
  302. select NEED_MACH_MEMORY_H
  303. help
  304. Support for Cirrus Logic 711x/721x/731x based boards.
  305. config ARCH_CNS3XXX
  306. bool "Cavium Networks CNS3XXX family"
  307. select CPU_V6K
  308. select GENERIC_CLOCKEVENTS
  309. select ARM_GIC
  310. select MIGHT_HAVE_CACHE_L2X0
  311. select MIGHT_HAVE_PCI
  312. select PCI_DOMAINS if PCI
  313. help
  314. Support for Cavium Networks CNS3XXX platform.
  315. config ARCH_GEMINI
  316. bool "Cortina Systems Gemini"
  317. select CPU_FA526
  318. select ARCH_REQUIRE_GPIOLIB
  319. select ARCH_USES_GETTIMEOFFSET
  320. help
  321. Support for the Cortina Systems Gemini family SoCs
  322. config ARCH_SIRF
  323. bool "CSR SiRF"
  324. select NO_IOPORT
  325. select ARCH_REQUIRE_GPIOLIB
  326. select GENERIC_CLOCKEVENTS
  327. select COMMON_CLK
  328. select GENERIC_IRQ_CHIP
  329. select MIGHT_HAVE_CACHE_L2X0
  330. select PINCTRL
  331. select PINCTRL_SIRF
  332. select USE_OF
  333. help
  334. Support for CSR SiRFprimaII/Marco/Polo platforms
  335. config ARCH_EBSA110
  336. bool "EBSA-110"
  337. select CPU_SA110
  338. select ISA
  339. select NO_IOPORT
  340. select ARCH_USES_GETTIMEOFFSET
  341. select NEED_MACH_IO_H
  342. select NEED_MACH_MEMORY_H
  343. help
  344. This is an evaluation board for the StrongARM processor available
  345. from Digital. It has limited hardware on-board, including an
  346. Ethernet interface, two PCMCIA sockets, two serial ports and a
  347. parallel port.
  348. config ARCH_EP93XX
  349. bool "EP93xx-based"
  350. select CPU_ARM920T
  351. select ARM_AMBA
  352. select ARM_VIC
  353. select CLKDEV_LOOKUP
  354. select ARCH_REQUIRE_GPIOLIB
  355. select ARCH_HAS_HOLES_MEMORYMODEL
  356. select ARCH_USES_GETTIMEOFFSET
  357. select NEED_MACH_MEMORY_H
  358. help
  359. This enables support for the Cirrus EP93xx series of CPUs.
  360. config ARCH_FOOTBRIDGE
  361. bool "FootBridge"
  362. select CPU_SA110
  363. select FOOTBRIDGE
  364. select GENERIC_CLOCKEVENTS
  365. select HAVE_IDE
  366. select NEED_MACH_IO_H if !MMU
  367. select NEED_MACH_MEMORY_H
  368. help
  369. Support for systems based on the DC21285 companion chip
  370. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  371. config ARCH_MXC
  372. bool "Freescale MXC/iMX-based"
  373. select GENERIC_CLOCKEVENTS
  374. select ARCH_REQUIRE_GPIOLIB
  375. select CLKDEV_LOOKUP
  376. select CLKSRC_MMIO
  377. select GENERIC_IRQ_CHIP
  378. select MULTI_IRQ_HANDLER
  379. select SPARSE_IRQ
  380. select USE_OF
  381. help
  382. Support for Freescale MXC/iMX-based family of processors
  383. config ARCH_MXS
  384. bool "Freescale MXS-based"
  385. select GENERIC_CLOCKEVENTS
  386. select ARCH_REQUIRE_GPIOLIB
  387. select CLKDEV_LOOKUP
  388. select CLKSRC_MMIO
  389. select COMMON_CLK
  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 CLKSRC_MMIO
  400. select CPU_ARM926T
  401. select ARM_VIC
  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 CPU_ARM720T
  408. select ISA_DMA_API
  409. select ARCH_USES_GETTIMEOFFSET
  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 CPU_XSC3
  416. select PLAT_IOP
  417. select PCI
  418. select ARCH_SUPPORTS_MSI
  419. select VMSPLIT_1G
  420. select NEED_MACH_MEMORY_H
  421. select NEED_RET_TO_USER
  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 CPU_XSCALE
  428. select NEED_MACH_GPIO_H
  429. select NEED_MACH_IO_H
  430. select NEED_RET_TO_USER
  431. select PLAT_IOP
  432. select PCI
  433. select ARCH_REQUIRE_GPIOLIB
  434. help
  435. Support for Intel's 80219 and IOP32X (XScale) family of
  436. processors.
  437. config ARCH_IOP33X
  438. bool "IOP33x-based"
  439. depends on MMU
  440. select CPU_XSCALE
  441. select NEED_MACH_GPIO_H
  442. select NEED_MACH_IO_H
  443. select NEED_RET_TO_USER
  444. select PLAT_IOP
  445. select PCI
  446. select ARCH_REQUIRE_GPIOLIB
  447. help
  448. Support for Intel's IOP33X (XScale) family of processors.
  449. config ARCH_IXP4XX
  450. bool "IXP4xx-based"
  451. depends on MMU
  452. select ARCH_HAS_DMA_SET_COHERENT_MASK
  453. select CLKSRC_MMIO
  454. select CPU_XSCALE
  455. select ARCH_REQUIRE_GPIOLIB
  456. select GENERIC_CLOCKEVENTS
  457. select MIGHT_HAVE_PCI
  458. select NEED_MACH_IO_H
  459. select DMABOUNCE if PCI
  460. help
  461. Support for Intel's IXP4XX (XScale) family of processors.
  462. config ARCH_DOVE
  463. bool "Marvell Dove"
  464. select CPU_V7
  465. select ARCH_REQUIRE_GPIOLIB
  466. select GENERIC_CLOCKEVENTS
  467. select MIGHT_HAVE_PCI
  468. select PLAT_ORION_LEGACY
  469. select USB_ARCH_HAS_EHCI
  470. help
  471. Support for the Marvell Dove SoC 88AP510
  472. config ARCH_KIRKWOOD
  473. bool "Marvell Kirkwood"
  474. select CPU_FEROCEON
  475. select PCI
  476. select ARCH_REQUIRE_GPIOLIB
  477. select GENERIC_CLOCKEVENTS
  478. select PLAT_ORION_LEGACY
  479. help
  480. Support for the following Marvell Kirkwood series SoCs:
  481. 88F6180, 88F6192 and 88F6281.
  482. config ARCH_LPC32XX
  483. bool "NXP LPC32XX"
  484. select CLKSRC_MMIO
  485. select CPU_ARM926T
  486. select ARCH_REQUIRE_GPIOLIB
  487. select HAVE_IDE
  488. select ARM_AMBA
  489. select USB_ARCH_HAS_OHCI
  490. select CLKDEV_LOOKUP
  491. select GENERIC_CLOCKEVENTS
  492. select USE_OF
  493. select HAVE_PWM
  494. help
  495. Support for the NXP LPC32XX family of processors
  496. config ARCH_MV78XX0
  497. bool "Marvell MV78xx0"
  498. select CPU_FEROCEON
  499. select PCI
  500. select ARCH_REQUIRE_GPIOLIB
  501. select GENERIC_CLOCKEVENTS
  502. select PLAT_ORION_LEGACY
  503. help
  504. Support for the following Marvell MV78xx0 series SoCs:
  505. MV781x0, MV782x0.
  506. config ARCH_ORION5X
  507. bool "Marvell Orion"
  508. depends on MMU
  509. select CPU_FEROCEON
  510. select PCI
  511. select ARCH_REQUIRE_GPIOLIB
  512. select GENERIC_CLOCKEVENTS
  513. select PLAT_ORION_LEGACY
  514. help
  515. Support for the following Marvell Orion 5x series SoCs:
  516. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  517. Orion-2 (5281), Orion-1-90 (6183).
  518. config ARCH_MMP
  519. bool "Marvell PXA168/910/MMP2"
  520. depends on MMU
  521. select ARCH_REQUIRE_GPIOLIB
  522. select CLKDEV_LOOKUP
  523. select GENERIC_CLOCKEVENTS
  524. select GPIO_PXA
  525. select IRQ_DOMAIN
  526. select PLAT_PXA
  527. select SPARSE_IRQ
  528. select GENERIC_ALLOCATOR
  529. select NEED_MACH_GPIO_H
  530. help
  531. Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
  532. config ARCH_KS8695
  533. bool "Micrel/Kendin KS8695"
  534. select CPU_ARM922T
  535. select ARCH_REQUIRE_GPIOLIB
  536. select NEED_MACH_MEMORY_H
  537. select CLKSRC_MMIO
  538. select GENERIC_CLOCKEVENTS
  539. help
  540. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  541. System-on-Chip devices.
  542. config ARCH_W90X900
  543. bool "Nuvoton W90X900 CPU"
  544. select CPU_ARM926T
  545. select ARCH_REQUIRE_GPIOLIB
  546. select CLKDEV_LOOKUP
  547. select CLKSRC_MMIO
  548. select GENERIC_CLOCKEVENTS
  549. help
  550. Support for Nuvoton (Winbond logic dept.) ARM9 processor,
  551. At present, the w90x900 has been renamed nuc900, regarding
  552. the ARM series product line, you can login the following
  553. link address to know more.
  554. <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
  555. ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
  556. config ARCH_TEGRA
  557. bool "NVIDIA Tegra"
  558. select CLKDEV_LOOKUP
  559. select CLKSRC_MMIO
  560. select GENERIC_CLOCKEVENTS
  561. select GENERIC_GPIO
  562. select HAVE_CLK
  563. select HAVE_SMP
  564. select MIGHT_HAVE_CACHE_L2X0
  565. select ARCH_HAS_CPUFREQ
  566. select USE_OF
  567. select COMMON_CLK
  568. help
  569. This enables support for NVIDIA Tegra based systems (Tegra APX,
  570. Tegra 6xx and Tegra 2 series).
  571. config ARCH_PXA
  572. bool "PXA2xx/PXA3xx-based"
  573. depends on MMU
  574. select ARCH_MTD_XIP
  575. select ARCH_HAS_CPUFREQ
  576. select CLKDEV_LOOKUP
  577. select CLKSRC_MMIO
  578. select ARCH_REQUIRE_GPIOLIB
  579. select GENERIC_CLOCKEVENTS
  580. select GPIO_PXA
  581. select PLAT_PXA
  582. select SPARSE_IRQ
  583. select AUTO_ZRELADDR
  584. select MULTI_IRQ_HANDLER
  585. select ARM_CPU_SUSPEND if PM
  586. select HAVE_IDE
  587. select NEED_MACH_GPIO_H
  588. help
  589. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  590. config ARCH_MSM
  591. bool "Qualcomm MSM"
  592. select HAVE_CLK
  593. select GENERIC_CLOCKEVENTS
  594. select ARCH_REQUIRE_GPIOLIB
  595. select CLKDEV_LOOKUP
  596. help
  597. Support for Qualcomm MSM/QSD based systems. This runs on the
  598. apps processor of the MSM/QSD and depends on a shared memory
  599. interface to the modem processor which runs the baseband
  600. stack and controls some vital subsystems
  601. (clock and power control, etc).
  602. config ARCH_SHMOBILE
  603. bool "Renesas SH-Mobile / R-Mobile"
  604. select HAVE_CLK
  605. select CLKDEV_LOOKUP
  606. select HAVE_MACH_CLKDEV
  607. select HAVE_SMP
  608. select GENERIC_CLOCKEVENTS
  609. select MIGHT_HAVE_CACHE_L2X0
  610. select NO_IOPORT
  611. select SPARSE_IRQ
  612. select MULTI_IRQ_HANDLER
  613. select PM_GENERIC_DOMAINS if PM
  614. select NEED_MACH_MEMORY_H
  615. help
  616. Support for Renesas's SH-Mobile and R-Mobile ARM platforms.
  617. config ARCH_RPC
  618. bool "RiscPC"
  619. select ARCH_ACORN
  620. select FIQ
  621. select ARCH_MAY_HAVE_PC_FDC
  622. select HAVE_PATA_PLATFORM
  623. select ISA_DMA_API
  624. select NO_IOPORT
  625. select ARCH_SPARSEMEM_ENABLE
  626. select ARCH_USES_GETTIMEOFFSET
  627. select HAVE_IDE
  628. select NEED_MACH_IO_H
  629. select NEED_MACH_MEMORY_H
  630. help
  631. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  632. CD-ROM interface, serial and parallel port, and the floppy drive.
  633. config ARCH_SA1100
  634. bool "SA1100-based"
  635. select CLKSRC_MMIO
  636. select CPU_SA1100
  637. select ISA
  638. select ARCH_SPARSEMEM_ENABLE
  639. select ARCH_MTD_XIP
  640. select ARCH_HAS_CPUFREQ
  641. select CPU_FREQ
  642. select GENERIC_CLOCKEVENTS
  643. select CLKDEV_LOOKUP
  644. select ARCH_REQUIRE_GPIOLIB
  645. select HAVE_IDE
  646. select NEED_MACH_GPIO_H
  647. select NEED_MACH_MEMORY_H
  648. select SPARSE_IRQ
  649. help
  650. Support for StrongARM 11x0 based boards.
  651. config ARCH_S3C24XX
  652. bool "Samsung S3C24XX SoCs"
  653. select GENERIC_GPIO
  654. select ARCH_HAS_CPUFREQ
  655. select HAVE_CLK
  656. select CLKDEV_LOOKUP
  657. select ARCH_USES_GETTIMEOFFSET
  658. select HAVE_S3C2410_I2C if I2C
  659. select HAVE_S3C_RTC if RTC_CLASS
  660. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  661. select NEED_MACH_GPIO_H
  662. select NEED_MACH_IO_H
  663. help
  664. Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443
  665. and S3C2450 SoCs based systems, such as the Simtec Electronics BAST
  666. (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or the
  667. Samsung SMDK2410 development board (and derivatives).
  668. config ARCH_S3C64XX
  669. bool "Samsung S3C64XX"
  670. select PLAT_SAMSUNG
  671. select CPU_V6
  672. select ARM_VIC
  673. select HAVE_CLK
  674. select HAVE_TCM
  675. select CLKDEV_LOOKUP
  676. select NO_IOPORT
  677. select ARCH_USES_GETTIMEOFFSET
  678. select ARCH_HAS_CPUFREQ
  679. select ARCH_REQUIRE_GPIOLIB
  680. select SAMSUNG_CLKSRC
  681. select SAMSUNG_IRQ_VIC_TIMER
  682. select S3C_GPIO_TRACK
  683. select S3C_DEV_NAND
  684. select USB_ARCH_HAS_OHCI
  685. select SAMSUNG_GPIOLIB_4BIT
  686. select HAVE_S3C2410_I2C if I2C
  687. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  688. select NEED_MACH_GPIO_H
  689. help
  690. Samsung S3C64XX series based systems
  691. config ARCH_S5P64X0
  692. bool "Samsung S5P6440 S5P6450"
  693. select CPU_V6
  694. select GENERIC_GPIO
  695. select HAVE_CLK
  696. select CLKDEV_LOOKUP
  697. select CLKSRC_MMIO
  698. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  699. select GENERIC_CLOCKEVENTS
  700. select HAVE_S3C2410_I2C if I2C
  701. select HAVE_S3C_RTC if RTC_CLASS
  702. select NEED_MACH_GPIO_H
  703. help
  704. Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
  705. SMDK6450.
  706. config ARCH_S5PC100
  707. bool "Samsung S5PC100"
  708. select GENERIC_GPIO
  709. select HAVE_CLK
  710. select CLKDEV_LOOKUP
  711. select CPU_V7
  712. select ARCH_USES_GETTIMEOFFSET
  713. select HAVE_S3C2410_I2C if I2C
  714. select HAVE_S3C_RTC if RTC_CLASS
  715. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  716. select NEED_MACH_GPIO_H
  717. help
  718. Samsung S5PC100 series based systems
  719. config ARCH_S5PV210
  720. bool "Samsung S5PV210/S5PC110"
  721. select CPU_V7
  722. select ARCH_SPARSEMEM_ENABLE
  723. select ARCH_HAS_HOLES_MEMORYMODEL
  724. select GENERIC_GPIO
  725. select HAVE_CLK
  726. select CLKDEV_LOOKUP
  727. select CLKSRC_MMIO
  728. select ARCH_HAS_CPUFREQ
  729. select GENERIC_CLOCKEVENTS
  730. select HAVE_S3C2410_I2C if I2C
  731. select HAVE_S3C_RTC if RTC_CLASS
  732. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  733. select NEED_MACH_GPIO_H
  734. select NEED_MACH_MEMORY_H
  735. help
  736. Samsung S5PV210/S5PC110 series based systems
  737. config ARCH_EXYNOS
  738. bool "SAMSUNG EXYNOS"
  739. select CPU_V7
  740. select ARCH_SPARSEMEM_ENABLE
  741. select ARCH_HAS_HOLES_MEMORYMODEL
  742. select GENERIC_GPIO
  743. select HAVE_CLK
  744. select CLKDEV_LOOKUP
  745. select ARCH_HAS_CPUFREQ
  746. select GENERIC_CLOCKEVENTS
  747. select HAVE_S3C_RTC if RTC_CLASS
  748. select HAVE_S3C2410_I2C if I2C
  749. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  750. select NEED_MACH_GPIO_H
  751. select NEED_MACH_MEMORY_H
  752. help
  753. Support for SAMSUNG's EXYNOS SoCs (EXYNOS4/5)
  754. config ARCH_SHARK
  755. bool "Shark"
  756. select CPU_SA110
  757. select ISA
  758. select ISA_DMA
  759. select ZONE_DMA
  760. select PCI
  761. select ARCH_USES_GETTIMEOFFSET
  762. select NEED_MACH_MEMORY_H
  763. help
  764. Support for the StrongARM based Digital DNARD machine, also known
  765. as "Shark" (<http://www.shark-linux.de/shark.html>).
  766. config ARCH_U300
  767. bool "ST-Ericsson U300 Series"
  768. depends on MMU
  769. select CLKSRC_MMIO
  770. select CPU_ARM926T
  771. select HAVE_TCM
  772. select ARM_AMBA
  773. select ARM_PATCH_PHYS_VIRT
  774. select ARM_VIC
  775. select GENERIC_CLOCKEVENTS
  776. select CLKDEV_LOOKUP
  777. select COMMON_CLK
  778. select GENERIC_GPIO
  779. select ARCH_REQUIRE_GPIOLIB
  780. select SPARSE_IRQ
  781. help
  782. Support for ST-Ericsson U300 series mobile platforms.
  783. config ARCH_U8500
  784. bool "ST-Ericsson U8500 Series"
  785. depends on MMU
  786. select CPU_V7
  787. select ARM_AMBA
  788. select GENERIC_CLOCKEVENTS
  789. select CLKDEV_LOOKUP
  790. select ARCH_REQUIRE_GPIOLIB
  791. select ARCH_HAS_CPUFREQ
  792. select HAVE_SMP
  793. select MIGHT_HAVE_CACHE_L2X0
  794. help
  795. Support for ST-Ericsson's Ux500 architecture
  796. config ARCH_NOMADIK
  797. bool "STMicroelectronics Nomadik"
  798. select ARM_AMBA
  799. select ARM_VIC
  800. select CPU_ARM926T
  801. select COMMON_CLK
  802. select GENERIC_CLOCKEVENTS
  803. select PINCTRL
  804. select PINCTRL_STN8815
  805. select MIGHT_HAVE_CACHE_L2X0
  806. select ARCH_REQUIRE_GPIOLIB
  807. help
  808. Support for the Nomadik platform by ST-Ericsson
  809. config ARCH_DAVINCI
  810. bool "TI DaVinci"
  811. select GENERIC_CLOCKEVENTS
  812. select ARCH_REQUIRE_GPIOLIB
  813. select ZONE_DMA
  814. select HAVE_IDE
  815. select CLKDEV_LOOKUP
  816. select GENERIC_ALLOCATOR
  817. select GENERIC_IRQ_CHIP
  818. select ARCH_HAS_HOLES_MEMORYMODEL
  819. select NEED_MACH_GPIO_H
  820. help
  821. Support for TI's DaVinci platform.
  822. config ARCH_OMAP
  823. bool "TI OMAP"
  824. depends on MMU
  825. select HAVE_CLK
  826. select ARCH_REQUIRE_GPIOLIB
  827. select ARCH_HAS_CPUFREQ
  828. select CLKSRC_MMIO
  829. select GENERIC_CLOCKEVENTS
  830. select ARCH_HAS_HOLES_MEMORYMODEL
  831. select NEED_MACH_GPIO_H
  832. help
  833. Support for TI's OMAP platform (OMAP1/2/3/4).
  834. config PLAT_SPEAR
  835. bool "ST SPEAr"
  836. select ARM_AMBA
  837. select ARCH_REQUIRE_GPIOLIB
  838. select CLKDEV_LOOKUP
  839. select COMMON_CLK
  840. select CLKSRC_MMIO
  841. select GENERIC_CLOCKEVENTS
  842. select HAVE_CLK
  843. help
  844. Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
  845. config ARCH_VT8500
  846. bool "VIA/WonderMedia 85xx"
  847. select CPU_ARM926T
  848. select GENERIC_GPIO
  849. select ARCH_HAS_CPUFREQ
  850. select GENERIC_CLOCKEVENTS
  851. select ARCH_REQUIRE_GPIOLIB
  852. select USE_OF
  853. select COMMON_CLK
  854. select HAVE_CLK
  855. select CLKDEV_LOOKUP
  856. help
  857. Support for VIA/WonderMedia VT8500/WM85xx System-on-Chip.
  858. config ARCH_ZYNQ
  859. bool "Xilinx Zynq ARM Cortex A9 Platform"
  860. select CPU_V7
  861. select GENERIC_CLOCKEVENTS
  862. select CLKDEV_LOOKUP
  863. select ARM_GIC
  864. select ARM_AMBA
  865. select ICST
  866. select MIGHT_HAVE_CACHE_L2X0
  867. select USE_OF
  868. help
  869. Support for Xilinx Zynq ARM Cortex A9 Platform
  870. endchoice
  871. menu "Multiple platform selection"
  872. depends on ARCH_MULTIPLATFORM
  873. comment "CPU Core family selection"
  874. config ARCH_MULTI_V4
  875. bool "ARMv4 based platforms (FA526, StrongARM)"
  876. select ARCH_MULTI_V4_V5
  877. depends on !ARCH_MULTI_V6_V7
  878. config ARCH_MULTI_V4T
  879. bool "ARMv4T based platforms (ARM720T, ARM920T, ...)"
  880. select ARCH_MULTI_V4_V5
  881. depends on !ARCH_MULTI_V6_V7
  882. config ARCH_MULTI_V5
  883. bool "ARMv5 based platforms (ARM926T, XSCALE, PJ1, ...)"
  884. select ARCH_MULTI_V4_V5
  885. depends on !ARCH_MULTI_V6_V7
  886. config ARCH_MULTI_V4_V5
  887. bool
  888. config ARCH_MULTI_V6
  889. bool "ARMv6 based platforms (ARM11, Scorpion, ...)"
  890. select CPU_V6
  891. select ARCH_MULTI_V6_V7
  892. config ARCH_MULTI_V7
  893. bool "ARMv7 based platforms (Cortex-A, PJ4, Krait)"
  894. select CPU_V7
  895. select ARCH_VEXPRESS
  896. default y
  897. select ARCH_MULTI_V6_V7
  898. config ARCH_MULTI_V6_V7
  899. bool
  900. config ARCH_MULTI_CPU_AUTO
  901. def_bool !(ARCH_MULTI_V4 || ARCH_MULTI_V4T || ARCH_MULTI_V6_V7)
  902. select ARCH_MULTI_V5
  903. endmenu
  904. #
  905. # This is sorted alphabetically by mach-* pathname. However, plat-*
  906. # Kconfigs may be included either alphabetically (according to the
  907. # plat- suffix) or along side the corresponding mach-* source.
  908. #
  909. source "arch/arm/mach-mvebu/Kconfig"
  910. source "arch/arm/mach-at91/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/plat-mxc/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-nomadik/Kconfig"
  934. source "arch/arm/plat-omap/Kconfig"
  935. source "arch/arm/mach-omap1/Kconfig"
  936. source "arch/arm/mach-omap2/Kconfig"
  937. source "arch/arm/mach-orion5x/Kconfig"
  938. source "arch/arm/mach-picoxcell/Kconfig"
  939. source "arch/arm/mach-pxa/Kconfig"
  940. source "arch/arm/plat-pxa/Kconfig"
  941. source "arch/arm/mach-mmp/Kconfig"
  942. source "arch/arm/mach-realview/Kconfig"
  943. source "arch/arm/mach-sa1100/Kconfig"
  944. source "arch/arm/plat-samsung/Kconfig"
  945. source "arch/arm/plat-s3c24xx/Kconfig"
  946. source "arch/arm/mach-socfpga/Kconfig"
  947. source "arch/arm/plat-spear/Kconfig"
  948. source "arch/arm/mach-s3c24xx/Kconfig"
  949. if ARCH_S3C24XX
  950. source "arch/arm/mach-s3c2412/Kconfig"
  951. source "arch/arm/mach-s3c2440/Kconfig"
  952. endif
  953. if ARCH_S3C64XX
  954. source "arch/arm/mach-s3c64xx/Kconfig"
  955. endif
  956. source "arch/arm/mach-s5p64x0/Kconfig"
  957. source "arch/arm/mach-s5pc100/Kconfig"
  958. source "arch/arm/mach-s5pv210/Kconfig"
  959. source "arch/arm/mach-exynos/Kconfig"
  960. source "arch/arm/mach-shmobile/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-w90x900/Kconfig"
  969. # Definitions to make life easier
  970. config ARCH_ACORN
  971. bool
  972. config PLAT_IOP
  973. bool
  974. select GENERIC_CLOCKEVENTS
  975. config PLAT_ORION
  976. bool
  977. select CLKSRC_MMIO
  978. select GENERIC_IRQ_CHIP
  979. select IRQ_DOMAIN
  980. select COMMON_CLK
  981. config PLAT_ORION_LEGACY
  982. bool
  983. select PLAT_ORION
  984. config PLAT_PXA
  985. bool
  986. config PLAT_VERSATILE
  987. bool
  988. config ARM_TIMER_SP804
  989. bool
  990. select CLKSRC_MMIO
  991. select HAVE_SCHED_CLOCK
  992. source arch/arm/mm/Kconfig
  993. config ARM_NR_BANKS
  994. int
  995. default 16 if ARCH_EP93XX
  996. default 8
  997. config IWMMXT
  998. bool "Enable iWMMXt support"
  999. depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
  1000. default y if PXA27x || PXA3xx || PXA95x || ARCH_MMP
  1001. help
  1002. Enable support for iWMMXt context switching at run time if
  1003. running on a CPU that supports it.
  1004. config XSCALE_PMU
  1005. bool
  1006. depends on CPU_XSCALE
  1007. default y
  1008. config MULTI_IRQ_HANDLER
  1009. bool
  1010. help
  1011. Allow each machine to specify it's own IRQ handler at run time.
  1012. if !MMU
  1013. source "arch/arm/Kconfig-nommu"
  1014. endif
  1015. config ARM_ERRATA_326103
  1016. bool "ARM errata: FSR write bit incorrect on a SWP to read-only memory"
  1017. depends on CPU_V6
  1018. help
  1019. Executing a SWP instruction to read-only memory does not set bit 11
  1020. of the FSR on the ARM 1136 prior to r1p0. This causes the kernel to
  1021. treat the access as a read, preventing a COW from occurring and
  1022. causing the faulting task to livelock.
  1023. config ARM_ERRATA_411920
  1024. bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
  1025. depends on CPU_V6 || CPU_V6K
  1026. help
  1027. Invalidation of the Instruction Cache operation can
  1028. fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
  1029. It does not affect the MPCore. This option enables the ARM Ltd.
  1030. recommended workaround.
  1031. config ARM_ERRATA_430973
  1032. bool "ARM errata: Stale prediction on replaced interworking branch"
  1033. depends on CPU_V7
  1034. help
  1035. This option enables the workaround for the 430973 Cortex-A8
  1036. (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
  1037. interworking branch is replaced with another code sequence at the
  1038. same virtual address, whether due to self-modifying code or virtual
  1039. to physical address re-mapping, Cortex-A8 does not recover from the
  1040. stale interworking branch prediction. This results in Cortex-A8
  1041. executing the new code sequence in the incorrect ARM or Thumb state.
  1042. The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
  1043. and also flushes the branch target cache at every context switch.
  1044. Note that setting specific bits in the ACTLR register may not be
  1045. available in non-secure mode.
  1046. config ARM_ERRATA_458693
  1047. bool "ARM errata: Processor deadlock when a false hazard is created"
  1048. depends on CPU_V7
  1049. help
  1050. This option enables the workaround for the 458693 Cortex-A8 (r2p0)
  1051. erratum. For very specific sequences of memory operations, it is
  1052. possible for a hazard condition intended for a cache line to instead
  1053. be incorrectly associated with a different cache line. This false
  1054. hazard might then cause a processor deadlock. The workaround enables
  1055. the L1 caching of the NEON accesses and disables the PLD instruction
  1056. in the ACTLR register. Note that setting specific bits in the ACTLR
  1057. register may not be available in non-secure mode.
  1058. config ARM_ERRATA_460075
  1059. bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
  1060. depends on CPU_V7
  1061. help
  1062. This option enables the workaround for the 460075 Cortex-A8 (r2p0)
  1063. erratum. Any asynchronous access to the L2 cache may encounter a
  1064. situation in which recent store transactions to the L2 cache are lost
  1065. and overwritten with stale memory contents from external memory. The
  1066. workaround disables the write-allocate mode for the L2 cache via the
  1067. ACTLR register. Note that setting specific bits in the ACTLR register
  1068. may not be available in non-secure mode.
  1069. config ARM_ERRATA_742230
  1070. bool "ARM errata: DMB operation may be faulty"
  1071. depends on CPU_V7 && SMP
  1072. help
  1073. This option enables the workaround for the 742230 Cortex-A9
  1074. (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
  1075. between two write operations may not ensure the correct visibility
  1076. ordering of the two writes. This workaround sets a specific bit in
  1077. the diagnostic register of the Cortex-A9 which causes the DMB
  1078. instruction to behave as a DSB, ensuring the correct behaviour of
  1079. the two writes.
  1080. config ARM_ERRATA_742231
  1081. bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
  1082. depends on CPU_V7 && SMP
  1083. help
  1084. This option enables the workaround for the 742231 Cortex-A9
  1085. (r2p0..r2p2) erratum. Under certain conditions, specific to the
  1086. Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
  1087. accessing some data located in the same cache line, may get corrupted
  1088. data due to bad handling of the address hazard when the line gets
  1089. replaced from one of the CPUs at the same time as another CPU is
  1090. accessing it. This workaround sets specific bits in the diagnostic
  1091. register of the Cortex-A9 which reduces the linefill issuing
  1092. capabilities of the processor.
  1093. config PL310_ERRATA_588369
  1094. bool "PL310 errata: Clean & Invalidate maintenance operations do not invalidate clean lines"
  1095. depends on CACHE_L2X0
  1096. help
  1097. The PL310 L2 cache controller implements three types of Clean &
  1098. Invalidate maintenance operations: by Physical Address
  1099. (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
  1100. They are architecturally defined to behave as the execution of a
  1101. clean operation followed immediately by an invalidate operation,
  1102. both performing to the same memory location. This functionality
  1103. is not correctly implemented in PL310 as clean lines are not
  1104. invalidated as a result of these operations.
  1105. config ARM_ERRATA_720789
  1106. bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
  1107. depends on CPU_V7
  1108. help
  1109. This option enables the workaround for the 720789 Cortex-A9 (prior to
  1110. r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
  1111. broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
  1112. As a consequence of this erratum, some TLB entries which should be
  1113. invalidated are not, resulting in an incoherency in the system page
  1114. tables. The workaround changes the TLB flushing routines to invalidate
  1115. entries regardless of the ASID.
  1116. config PL310_ERRATA_727915
  1117. bool "PL310 errata: Background Clean & Invalidate by Way operation can cause data corruption"
  1118. depends on CACHE_L2X0
  1119. help
  1120. PL310 implements the Clean & Invalidate by Way L2 cache maintenance
  1121. operation (offset 0x7FC). This operation runs in background so that
  1122. PL310 can handle normal accesses while it is in progress. Under very
  1123. rare circumstances, due to this erratum, write data can be lost when
  1124. PL310 treats a cacheable write transaction during a Clean &
  1125. Invalidate by Way operation.
  1126. config ARM_ERRATA_743622
  1127. bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
  1128. depends on CPU_V7
  1129. help
  1130. This option enables the workaround for the 743622 Cortex-A9
  1131. (r2p*) erratum. Under very rare conditions, a faulty
  1132. optimisation in the Cortex-A9 Store Buffer may lead to data
  1133. corruption. This workaround sets a specific bit in the diagnostic
  1134. register of the Cortex-A9 which disables the Store Buffer
  1135. optimisation, preventing the defect from occurring. This has no
  1136. visible impact on the overall performance or power consumption of the
  1137. processor.
  1138. config ARM_ERRATA_751472
  1139. bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
  1140. depends on CPU_V7
  1141. help
  1142. This option enables the workaround for the 751472 Cortex-A9 (prior
  1143. to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
  1144. completion of a following broadcasted operation if the second
  1145. operation is received by a CPU before the ICIALLUIS has completed,
  1146. potentially leading to corrupted entries in the cache or TLB.
  1147. config PL310_ERRATA_753970
  1148. bool "PL310 errata: cache sync operation may be faulty"
  1149. depends on CACHE_PL310
  1150. help
  1151. This option enables the workaround for the 753970 PL310 (r3p0) erratum.
  1152. Under some condition the effect of cache sync operation on
  1153. the store buffer still remains when the operation completes.
  1154. This means that the store buffer is always asked to drain and
  1155. this prevents it from merging any further writes. The workaround
  1156. is to replace the normal offset of cache sync operation (0x730)
  1157. by another offset targeting an unmapped PL310 register 0x740.
  1158. This has the same effect as the cache sync operation: store buffer
  1159. drain and waiting for all buffers empty.
  1160. config ARM_ERRATA_754322
  1161. bool "ARM errata: possible faulty MMU translations following an ASID switch"
  1162. depends on CPU_V7
  1163. help
  1164. This option enables the workaround for the 754322 Cortex-A9 (r2p*,
  1165. r3p*) erratum. A speculative memory access may cause a page table walk
  1166. which starts prior to an ASID switch but completes afterwards. This
  1167. can populate the micro-TLB with a stale entry which may be hit with
  1168. the new ASID. This workaround places two dsb instructions in the mm
  1169. switching code so that no page table walks can cross the ASID switch.
  1170. config ARM_ERRATA_754327
  1171. bool "ARM errata: no automatic Store Buffer drain"
  1172. depends on CPU_V7 && SMP
  1173. help
  1174. This option enables the workaround for the 754327 Cortex-A9 (prior to
  1175. r2p0) erratum. The Store Buffer does not have any automatic draining
  1176. mechanism and therefore a livelock may occur if an external agent
  1177. continuously polls a memory location waiting to observe an update.
  1178. This workaround defines cpu_relax() as smp_mb(), preventing correctly
  1179. written polling loops from denying visibility of updates to memory.
  1180. config ARM_ERRATA_364296
  1181. bool "ARM errata: Possible cache data corruption with hit-under-miss enabled"
  1182. depends on CPU_V6 && !SMP
  1183. help
  1184. This options enables the workaround for the 364296 ARM1136
  1185. r0p2 erratum (possible cache data corruption with
  1186. hit-under-miss enabled). It sets the undocumented bit 31 in
  1187. the auxiliary control register and the FI bit in the control
  1188. register, thus disabling hit-under-miss without putting the
  1189. processor into full low interrupt latency mode. ARM11MPCore
  1190. is not affected.
  1191. config ARM_ERRATA_764369
  1192. bool "ARM errata: Data cache line maintenance operation by MVA may not succeed"
  1193. depends on CPU_V7 && SMP
  1194. help
  1195. This option enables the workaround for erratum 764369
  1196. affecting Cortex-A9 MPCore with two or more processors (all
  1197. current revisions). Under certain timing circumstances, a data
  1198. cache line maintenance operation by MVA targeting an Inner
  1199. Shareable memory region may fail to proceed up to either the
  1200. Point of Coherency or to the Point of Unification of the
  1201. system. This workaround adds a DSB instruction before the
  1202. relevant cache maintenance functions and sets a specific bit
  1203. in the diagnostic control register of the SCU.
  1204. config PL310_ERRATA_769419
  1205. bool "PL310 errata: no automatic Store Buffer drain"
  1206. depends on CACHE_L2X0
  1207. help
  1208. On revisions of the PL310 prior to r3p2, the Store Buffer does
  1209. not automatically drain. This can cause normal, non-cacheable
  1210. writes to be retained when the memory system is idle, leading
  1211. to suboptimal I/O performance for drivers using coherent DMA.
  1212. This option adds a write barrier to the cpu_idle loop so that,
  1213. on systems with an outer cache, the store buffer is drained
  1214. explicitly.
  1215. config ARM_ERRATA_775420
  1216. bool "ARM errata: A data cache maintenance operation which aborts, might lead to deadlock"
  1217. depends on CPU_V7
  1218. help
  1219. This option enables the workaround for the 775420 Cortex-A9 (r2p2,
  1220. r2p6,r2p8,r2p10,r3p0) erratum. In case a date cache maintenance
  1221. operation aborts with MMU exception, it might cause the processor
  1222. to deadlock. This workaround puts DSB before executing ISB if
  1223. an abort may occur on cache maintenance.
  1224. endmenu
  1225. source "arch/arm/common/Kconfig"
  1226. menu "Bus support"
  1227. config ARM_AMBA
  1228. bool
  1229. config ISA
  1230. bool
  1231. help
  1232. Find out whether you have ISA slots on your motherboard. ISA is the
  1233. name of a bus system, i.e. the way the CPU talks to the other stuff
  1234. inside your box. Other bus systems are PCI, EISA, MicroChannel
  1235. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  1236. newer boards don't support it. If you have ISA, say Y, otherwise N.
  1237. # Select ISA DMA controller support
  1238. config ISA_DMA
  1239. bool
  1240. select ISA_DMA_API
  1241. # Select ISA DMA interface
  1242. config ISA_DMA_API
  1243. bool
  1244. config PCI
  1245. bool "PCI support" if MIGHT_HAVE_PCI
  1246. help
  1247. Find out whether you have a PCI motherboard. PCI is the name of a
  1248. bus system, i.e. the way the CPU talks to the other stuff inside
  1249. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  1250. VESA. If you have PCI, say Y, otherwise N.
  1251. config PCI_DOMAINS
  1252. bool
  1253. depends on PCI
  1254. config PCI_NANOENGINE
  1255. bool "BSE nanoEngine PCI support"
  1256. depends on SA1100_NANOENGINE
  1257. help
  1258. Enable PCI on the BSE nanoEngine board.
  1259. config PCI_SYSCALL
  1260. def_bool PCI
  1261. # Select the host bridge type
  1262. config PCI_HOST_VIA82C505
  1263. bool
  1264. depends on PCI && ARCH_SHARK
  1265. default y
  1266. config PCI_HOST_ITE8152
  1267. bool
  1268. depends on PCI && MACH_ARMCORE
  1269. default y
  1270. select DMABOUNCE
  1271. source "drivers/pci/Kconfig"
  1272. source "drivers/pcmcia/Kconfig"
  1273. endmenu
  1274. menu "Kernel Features"
  1275. config HAVE_SMP
  1276. bool
  1277. help
  1278. This option should be selected by machines which have an SMP-
  1279. capable CPU.
  1280. The only effect of this option is to make the SMP-related
  1281. options available to the user for configuration.
  1282. config SMP
  1283. bool "Symmetric Multi-Processing"
  1284. depends on CPU_V6K || CPU_V7
  1285. depends on GENERIC_CLOCKEVENTS
  1286. depends on HAVE_SMP
  1287. depends on MMU
  1288. select USE_GENERIC_SMP_HELPERS
  1289. select HAVE_ARM_SCU if !ARCH_MSM_SCORPIONMP
  1290. help
  1291. This enables support for systems with more than one CPU. If you have
  1292. a system with only one CPU, like most personal computers, say N. If
  1293. you have a system with more than one CPU, say Y.
  1294. If you say N here, the kernel will run on single and multiprocessor
  1295. machines, but will use only one CPU of a multiprocessor machine. If
  1296. you say Y here, the kernel will run on many, but not all, single
  1297. processor machines. On a single processor machine, the kernel will
  1298. run faster if you say N here.
  1299. See also <file:Documentation/x86/i386/IO-APIC.txt>,
  1300. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  1301. <http://tldp.org/HOWTO/SMP-HOWTO.html>.
  1302. If you don't know what to do here, say N.
  1303. config SMP_ON_UP
  1304. bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
  1305. depends on EXPERIMENTAL
  1306. depends on SMP && !XIP_KERNEL
  1307. default y
  1308. help
  1309. SMP kernels contain instructions which fail on non-SMP processors.
  1310. Enabling this option allows the kernel to modify itself to make
  1311. these instructions safe. Disabling it allows about 1K of space
  1312. savings.
  1313. If you don't know what to do here, say Y.
  1314. config ARM_CPU_TOPOLOGY
  1315. bool "Support cpu topology definition"
  1316. depends on SMP && CPU_V7
  1317. default y
  1318. help
  1319. Support ARM cpu topology definition. The MPIDR register defines
  1320. affinity between processors which is then used to describe the cpu
  1321. topology of an ARM System.
  1322. config SCHED_MC
  1323. bool "Multi-core scheduler support"
  1324. depends on ARM_CPU_TOPOLOGY
  1325. help
  1326. Multi-core scheduler support improves the CPU scheduler's decision
  1327. making when dealing with multi-core CPU chips at a cost of slightly
  1328. increased overhead in some places. If unsure say N here.
  1329. config SCHED_SMT
  1330. bool "SMT scheduler support"
  1331. depends on ARM_CPU_TOPOLOGY
  1332. help
  1333. Improves the CPU scheduler's decision making when dealing with
  1334. MultiThreading at a cost of slightly increased overhead in some
  1335. places. If unsure say N here.
  1336. config HAVE_ARM_SCU
  1337. bool
  1338. help
  1339. This option enables support for the ARM system coherency unit
  1340. config ARM_ARCH_TIMER
  1341. bool "Architected timer support"
  1342. depends on CPU_V7
  1343. help
  1344. This option enables support for the ARM architected timer
  1345. config HAVE_ARM_TWD
  1346. bool
  1347. depends on SMP
  1348. help
  1349. This options enables support for the ARM timer and watchdog unit
  1350. choice
  1351. prompt "Memory split"
  1352. default VMSPLIT_3G
  1353. help
  1354. Select the desired split between kernel and user memory.
  1355. If you are not absolutely sure what you are doing, leave this
  1356. option alone!
  1357. config VMSPLIT_3G
  1358. bool "3G/1G user/kernel split"
  1359. config VMSPLIT_2G
  1360. bool "2G/2G user/kernel split"
  1361. config VMSPLIT_1G
  1362. bool "1G/3G user/kernel split"
  1363. endchoice
  1364. config PAGE_OFFSET
  1365. hex
  1366. default 0x40000000 if VMSPLIT_1G
  1367. default 0x80000000 if VMSPLIT_2G
  1368. default 0xC0000000
  1369. config NR_CPUS
  1370. int "Maximum number of CPUs (2-32)"
  1371. range 2 32
  1372. depends on SMP
  1373. default "4"
  1374. config HOTPLUG_CPU
  1375. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  1376. depends on SMP && HOTPLUG && EXPERIMENTAL
  1377. help
  1378. Say Y here to experiment with turning CPUs off and on. CPUs
  1379. can be controlled through /sys/devices/system/cpu.
  1380. config LOCAL_TIMERS
  1381. bool "Use local timer interrupts"
  1382. depends on SMP
  1383. default y
  1384. select HAVE_ARM_TWD if (!ARCH_MSM_SCORPIONMP && !EXYNOS4_MCT)
  1385. help
  1386. Enable support for local timers on SMP platforms, rather then the
  1387. legacy IPI broadcast method. Local timers allows the system
  1388. accounting to be spread across the timer interval, preventing a
  1389. "thundering herd" at every timer tick.
  1390. config ARCH_NR_GPIO
  1391. int
  1392. default 1024 if ARCH_SHMOBILE || ARCH_TEGRA
  1393. default 355 if ARCH_U8500
  1394. default 264 if MACH_H4700
  1395. default 512 if SOC_OMAP5
  1396. default 288 if ARCH_VT8500
  1397. default 0
  1398. help
  1399. Maximum number of GPIOs in the system.
  1400. If unsure, leave the default value.
  1401. source kernel/Kconfig.preempt
  1402. config HZ
  1403. int
  1404. default 200 if ARCH_EBSA110 || ARCH_S3C24XX || ARCH_S5P64X0 || \
  1405. ARCH_S5PV210 || ARCH_EXYNOS4
  1406. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  1407. default AT91_TIMER_HZ if ARCH_AT91
  1408. default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
  1409. default 100
  1410. config THUMB2_KERNEL
  1411. bool "Compile the kernel in Thumb-2 mode (EXPERIMENTAL)"
  1412. depends on CPU_V7 && !CPU_V6 && !CPU_V6K && EXPERIMENTAL
  1413. select AEABI
  1414. select ARM_ASM_UNIFIED
  1415. select ARM_UNWIND
  1416. help
  1417. By enabling this option, the kernel will be compiled in
  1418. Thumb-2 mode. A compiler/assembler that understand the unified
  1419. ARM-Thumb syntax is needed.
  1420. If unsure, say N.
  1421. config THUMB2_AVOID_R_ARM_THM_JUMP11
  1422. bool "Work around buggy Thumb-2 short branch relocations in gas"
  1423. depends on THUMB2_KERNEL && MODULES
  1424. default y
  1425. help
  1426. Various binutils versions can resolve Thumb-2 branches to
  1427. locally-defined, preemptible global symbols as short-range "b.n"
  1428. branch instructions.
  1429. This is a problem, because there's no guarantee the final
  1430. destination of the symbol, or any candidate locations for a
  1431. trampoline, are within range of the branch. For this reason, the
  1432. kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
  1433. relocation in modules at all, and it makes little sense to add
  1434. support.
  1435. The symptom is that the kernel fails with an "unsupported
  1436. relocation" error when loading some modules.
  1437. Until fixed tools are available, passing
  1438. -fno-optimize-sibling-calls to gcc should prevent gcc generating
  1439. code which hits this problem, at the cost of a bit of extra runtime
  1440. stack usage in some cases.
  1441. The problem is described in more detail at:
  1442. https://bugs.launchpad.net/binutils-linaro/+bug/725126
  1443. Only Thumb-2 kernels are affected.
  1444. Unless you are sure your tools don't have this problem, say Y.
  1445. config ARM_ASM_UNIFIED
  1446. bool
  1447. config AEABI
  1448. bool "Use the ARM EABI to compile the kernel"
  1449. help
  1450. This option allows for the kernel to be compiled using the latest
  1451. ARM ABI (aka EABI). This is only useful if you are using a user
  1452. space environment that is also compiled with EABI.
  1453. Since there are major incompatibilities between the legacy ABI and
  1454. EABI, especially with regard to structure member alignment, this
  1455. option also changes the kernel syscall calling convention to
  1456. disambiguate both ABIs and allow for backward compatibility support
  1457. (selected with CONFIG_OABI_COMPAT).
  1458. To use this you need GCC version 4.0.0 or later.
  1459. config OABI_COMPAT
  1460. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  1461. depends on AEABI && EXPERIMENTAL && !THUMB2_KERNEL
  1462. default y
  1463. help
  1464. This option preserves the old syscall interface along with the
  1465. new (ARM EABI) one. It also provides a compatibility layer to
  1466. intercept syscalls that have structure arguments which layout
  1467. in memory differs between the legacy ABI and the new ARM EABI
  1468. (only for non "thumb" binaries). This option adds a tiny
  1469. overhead to all syscalls and produces a slightly larger kernel.
  1470. If you know you'll be using only pure EABI user space then you
  1471. can say N here. If this option is not selected and you attempt
  1472. to execute a legacy ABI binary then the result will be
  1473. UNPREDICTABLE (in fact it can be predicted that it won't work
  1474. at all). If in doubt say Y.
  1475. config ARCH_HAS_HOLES_MEMORYMODEL
  1476. bool
  1477. config ARCH_SPARSEMEM_ENABLE
  1478. bool
  1479. config ARCH_SPARSEMEM_DEFAULT
  1480. def_bool ARCH_SPARSEMEM_ENABLE
  1481. config ARCH_SELECT_MEMORY_MODEL
  1482. def_bool ARCH_SPARSEMEM_ENABLE
  1483. config HAVE_ARCH_PFN_VALID
  1484. def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
  1485. config HIGHMEM
  1486. bool "High Memory Support"
  1487. depends on MMU
  1488. help
  1489. The address space of ARM processors is only 4 Gigabytes large
  1490. and it has to accommodate user address space, kernel address
  1491. space as well as some memory mapped IO. That means that, if you
  1492. have a large amount of physical memory and/or IO, not all of the
  1493. memory can be "permanently mapped" by the kernel. The physical
  1494. memory that is not permanently mapped is called "high memory".
  1495. Depending on the selected kernel/user memory split, minimum
  1496. vmalloc space and actual amount of RAM, you may not need this
  1497. option which should result in a slightly faster kernel.
  1498. If unsure, say n.
  1499. config HIGHPTE
  1500. bool "Allocate 2nd-level pagetables from highmem"
  1501. depends on HIGHMEM
  1502. config HW_PERF_EVENTS
  1503. bool "Enable hardware performance counter support for perf events"
  1504. depends on PERF_EVENTS
  1505. default y
  1506. help
  1507. Enable hardware performance counter support for perf events. If
  1508. disabled, perf events will use software events only.
  1509. source "mm/Kconfig"
  1510. config FORCE_MAX_ZONEORDER
  1511. int "Maximum zone order" if ARCH_SHMOBILE
  1512. range 11 64 if ARCH_SHMOBILE
  1513. default "9" if SA1111
  1514. default "11"
  1515. help
  1516. The kernel memory allocator divides physically contiguous memory
  1517. blocks into "zones", where each zone is a power of two number of
  1518. pages. This option selects the largest power of two that the kernel
  1519. keeps in the memory allocator. If you need to allocate very large
  1520. blocks of physically contiguous memory, then you may need to
  1521. increase this value.
  1522. This config option is actually maximum order plus one. For example,
  1523. a value of 11 means that the largest free memory block is 2^10 pages.
  1524. config ALIGNMENT_TRAP
  1525. bool
  1526. depends on CPU_CP15_MMU
  1527. default y if !ARCH_EBSA110
  1528. select HAVE_PROC_CPU if PROC_FS
  1529. help
  1530. ARM processors cannot fetch/store information which is not
  1531. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  1532. address divisible by 4. On 32-bit ARM processors, these non-aligned
  1533. fetch/store instructions will be emulated in software if you say
  1534. here, which has a severe performance impact. This is necessary for
  1535. correct operation of some network protocols. With an IP-only
  1536. configuration it is safe to say N, otherwise say Y.
  1537. config UACCESS_WITH_MEMCPY
  1538. bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user()"
  1539. depends on MMU
  1540. default y if CPU_FEROCEON
  1541. help
  1542. Implement faster copy_to_user and clear_user methods for CPU
  1543. cores where a 8-word STM instruction give significantly higher
  1544. memory write throughput than a sequence of individual 32bit stores.
  1545. A possible side effect is a slight increase in scheduling latency
  1546. between threads sharing the same address space if they invoke
  1547. such copy operations with large buffers.
  1548. However, if the CPU data cache is using a write-allocate mode,
  1549. this option is unlikely to provide any performance gain.
  1550. config SECCOMP
  1551. bool
  1552. prompt "Enable seccomp to safely compute untrusted bytecode"
  1553. ---help---
  1554. This kernel feature is useful for number crunching applications
  1555. that may need to compute untrusted bytecode during their
  1556. execution. By using pipes or other transports made available to
  1557. the process as file descriptors supporting the read/write
  1558. syscalls, it's possible to isolate those applications in
  1559. their own address space using seccomp. Once seccomp is
  1560. enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
  1561. and the task is only allowed to execute a few safe syscalls
  1562. defined by each seccomp mode.
  1563. config CC_STACKPROTECTOR
  1564. bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
  1565. depends on EXPERIMENTAL
  1566. help
  1567. This option turns on the -fstack-protector GCC feature. This
  1568. feature puts, at the beginning of functions, a canary value on
  1569. the stack just before the return address, and validates
  1570. the value just before actually returning. Stack based buffer
  1571. overflows (that need to overwrite this return address) now also
  1572. overwrite the canary, which gets detected and the attack is then
  1573. neutralized via a kernel panic.
  1574. This feature requires gcc version 4.2 or above.
  1575. config XEN_DOM0
  1576. def_bool y
  1577. depends on XEN
  1578. config XEN
  1579. bool "Xen guest support on ARM (EXPERIMENTAL)"
  1580. depends on EXPERIMENTAL && ARM && OF
  1581. help
  1582. Say Y if you want to run Linux in a Virtual Machine on Xen on ARM.
  1583. endmenu
  1584. menu "Boot options"
  1585. config USE_OF
  1586. bool "Flattened Device Tree support"
  1587. select OF
  1588. select OF_EARLY_FLATTREE
  1589. select IRQ_DOMAIN
  1590. help
  1591. Include support for flattened device tree machine descriptions.
  1592. config ATAGS
  1593. bool "Support for the traditional ATAGS boot data passing" if USE_OF
  1594. default y
  1595. help
  1596. This is the traditional way of passing data to the kernel at boot
  1597. time. If you are solely relying on the flattened device tree (or
  1598. the ARM_ATAG_DTB_COMPAT option) then you may unselect this option
  1599. to remove ATAGS support from your kernel binary. If unsure,
  1600. leave this to y.
  1601. config DEPRECATED_PARAM_STRUCT
  1602. bool "Provide old way to pass kernel parameters"
  1603. depends on ATAGS
  1604. help
  1605. This was deprecated in 2001 and announced to live on for 5 years.
  1606. Some old boot loaders still use this way.
  1607. # Compressed boot loader in ROM. Yes, we really want to ask about
  1608. # TEXT and BSS so we preserve their values in the config files.
  1609. config ZBOOT_ROM_TEXT
  1610. hex "Compressed ROM boot loader base address"
  1611. default "0"
  1612. help
  1613. The physical address at which the ROM-able zImage is to be
  1614. placed in the target. Platforms which normally make use of
  1615. ROM-able zImage formats normally set this to a suitable
  1616. value in their defconfig file.
  1617. If ZBOOT_ROM is not enabled, this has no effect.
  1618. config ZBOOT_ROM_BSS
  1619. hex "Compressed ROM boot loader BSS address"
  1620. default "0"
  1621. help
  1622. The base address of an area of read/write memory in the target
  1623. for the ROM-able zImage which must be available while the
  1624. decompressor is running. It must be large enough to hold the
  1625. entire decompressed kernel plus an additional 128 KiB.
  1626. Platforms which normally make use of ROM-able zImage formats
  1627. normally set this to a suitable value in their defconfig file.
  1628. If ZBOOT_ROM is not enabled, this has no effect.
  1629. config ZBOOT_ROM
  1630. bool "Compressed boot loader in ROM/flash"
  1631. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  1632. help
  1633. Say Y here if you intend to execute your compressed kernel image
  1634. (zImage) directly from ROM or flash. If unsure, say N.
  1635. choice
  1636. prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)"
  1637. depends on ZBOOT_ROM && ARCH_SH7372 && EXPERIMENTAL
  1638. default ZBOOT_ROM_NONE
  1639. help
  1640. Include experimental SD/MMC loading code in the ROM-able zImage.
  1641. With this enabled it is possible to write the ROM-able zImage
  1642. kernel image to an MMC or SD card and boot the kernel straight
  1643. from the reset vector. At reset the processor Mask ROM will load
  1644. the first part of the ROM-able zImage which in turn loads the
  1645. rest the kernel image to RAM.
  1646. config ZBOOT_ROM_NONE
  1647. bool "No SD/MMC loader in zImage (EXPERIMENTAL)"
  1648. help
  1649. Do not load image from SD or MMC
  1650. config ZBOOT_ROM_MMCIF
  1651. bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
  1652. help
  1653. Load image from MMCIF hardware block.
  1654. config ZBOOT_ROM_SH_MOBILE_SDHI
  1655. bool "Include SuperH Mobile SDHI loader in zImage (EXPERIMENTAL)"
  1656. help
  1657. Load image from SDHI hardware block
  1658. endchoice
  1659. config ARM_APPENDED_DTB
  1660. bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
  1661. depends on OF && !ZBOOT_ROM && EXPERIMENTAL
  1662. help
  1663. With this option, the boot code will look for a device tree binary
  1664. (DTB) appended to zImage
  1665. (e.g. cat zImage <filename>.dtb > zImage_w_dtb).
  1666. This is meant as a backward compatibility convenience for those
  1667. systems with a bootloader that can't be upgraded to accommodate
  1668. the documented boot protocol using a device tree.
  1669. Beware that there is very little in terms of protection against
  1670. this option being confused by leftover garbage in memory that might
  1671. look like a DTB header after a reboot if no actual DTB is appended
  1672. to zImage. Do not leave this option active in a production kernel
  1673. if you don't intend to always append a DTB. Proper passing of the
  1674. location into r2 of a bootloader provided DTB is always preferable
  1675. to this option.
  1676. config ARM_ATAG_DTB_COMPAT
  1677. bool "Supplement the appended DTB with traditional ATAG information"
  1678. depends on ARM_APPENDED_DTB
  1679. help
  1680. Some old bootloaders can't be updated to a DTB capable one, yet
  1681. they provide ATAGs with memory configuration, the ramdisk address,
  1682. the kernel cmdline string, etc. Such information is dynamically
  1683. provided by the bootloader and can't always be stored in a static
  1684. DTB. To allow a device tree enabled kernel to be used with such
  1685. bootloaders, this option allows zImage to extract the information
  1686. from the ATAG list and store it at run time into the appended DTB.
  1687. choice
  1688. prompt "Kernel command line type" if ARM_ATAG_DTB_COMPAT
  1689. default ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
  1690. config ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
  1691. bool "Use bootloader kernel arguments if available"
  1692. help
  1693. Uses the command-line options passed by the boot loader instead of
  1694. the device tree bootargs property. If the boot loader doesn't provide
  1695. any, the device tree bootargs property will be used.
  1696. config ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEND
  1697. bool "Extend with bootloader kernel arguments"
  1698. help
  1699. The command-line arguments provided by the boot loader will be
  1700. appended to the the device tree bootargs property.
  1701. endchoice
  1702. config CMDLINE
  1703. string "Default kernel command string"
  1704. default ""
  1705. help
  1706. On some architectures (EBSA110 and CATS), there is currently no way
  1707. for the boot loader to pass arguments to the kernel. For these
  1708. architectures, you should supply some command-line options at build
  1709. time by entering them here. As a minimum, you should specify the
  1710. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  1711. choice
  1712. prompt "Kernel command line type" if CMDLINE != ""
  1713. default CMDLINE_FROM_BOOTLOADER
  1714. depends on ATAGS
  1715. config CMDLINE_FROM_BOOTLOADER
  1716. bool "Use bootloader kernel arguments if available"
  1717. help
  1718. Uses the command-line options passed by the boot loader. If
  1719. the boot loader doesn't provide any, the default kernel command
  1720. string provided in CMDLINE will be used.
  1721. config CMDLINE_EXTEND
  1722. bool "Extend bootloader kernel arguments"
  1723. help
  1724. The command-line arguments provided by the boot loader will be
  1725. appended to the default kernel command string.
  1726. config CMDLINE_FORCE
  1727. bool "Always use the default kernel command string"
  1728. help
  1729. Always use the default kernel command string, even if the boot
  1730. loader passes other arguments to the kernel.
  1731. This is useful if you cannot or don't want to change the
  1732. command-line options your boot loader passes to the kernel.
  1733. endchoice
  1734. config XIP_KERNEL
  1735. bool "Kernel Execute-In-Place from ROM"
  1736. depends on !ZBOOT_ROM && !ARM_LPAE && !ARCH_MULTIPLATFORM
  1737. help
  1738. Execute-In-Place allows the kernel to run from non-volatile storage
  1739. directly addressable by the CPU, such as NOR flash. This saves RAM
  1740. space since the text section of the kernel is not loaded from flash
  1741. to RAM. Read-write sections, such as the data section and stack,
  1742. are still copied to RAM. The XIP kernel is not compressed since
  1743. it has to run directly from flash, so it will take more space to
  1744. store it. The flash address used to link the kernel object files,
  1745. and for storing it, is configuration dependent. Therefore, if you
  1746. say Y here, you must know the proper physical address where to
  1747. store the kernel image depending on your own flash memory usage.
  1748. Also note that the make target becomes "make xipImage" rather than
  1749. "make zImage" or "make Image". The final kernel binary to put in
  1750. ROM memory will be arch/arm/boot/xipImage.
  1751. If unsure, say N.
  1752. config XIP_PHYS_ADDR
  1753. hex "XIP Kernel Physical Location"
  1754. depends on XIP_KERNEL
  1755. default "0x00080000"
  1756. help
  1757. This is the physical address in your flash memory the kernel will
  1758. be linked for and stored to. This address is dependent on your
  1759. own flash usage.
  1760. config KEXEC
  1761. bool "Kexec system call (EXPERIMENTAL)"
  1762. depends on EXPERIMENTAL && (!SMP || HOTPLUG_CPU)
  1763. help
  1764. kexec is a system call that implements the ability to shutdown your
  1765. current kernel, and to start another kernel. It is like a reboot
  1766. but it is independent of the system firmware. And like a reboot
  1767. you can start any kernel with it, not just Linux.
  1768. It is an ongoing process to be certain the hardware in a machine
  1769. is properly shutdown, so do not be surprised if this code does not
  1770. initially work for you. It may help to enable device hotplugging
  1771. support.
  1772. config ATAGS_PROC
  1773. bool "Export atags in procfs"
  1774. depends on ATAGS && KEXEC
  1775. default y
  1776. help
  1777. Should the atags used to boot the kernel be exported in an "atags"
  1778. file in procfs. Useful with kexec.
  1779. config CRASH_DUMP
  1780. bool "Build kdump crash kernel (EXPERIMENTAL)"
  1781. depends on EXPERIMENTAL
  1782. help
  1783. Generate crash dump after being started by kexec. This should
  1784. be normally only set in special crash dump kernels which are
  1785. loaded in the main kernel with kexec-tools into a specially
  1786. reserved region and then later executed after a crash by
  1787. kdump/kexec. The crash dump kernel must be compiled to a
  1788. memory address not used by the main kernel
  1789. For more details see Documentation/kdump/kdump.txt
  1790. config AUTO_ZRELADDR
  1791. bool "Auto calculation of the decompressed kernel image address"
  1792. depends on !ZBOOT_ROM && !ARCH_U300
  1793. help
  1794. ZRELADDR is the physical address where the decompressed kernel
  1795. image will be placed. If AUTO_ZRELADDR is selected, the address
  1796. will be determined at run-time by masking the current IP with
  1797. 0xf8000000. This assumes the zImage being placed in the first 128MB
  1798. from start of memory.
  1799. endmenu
  1800. menu "CPU Power Management"
  1801. if ARCH_HAS_CPUFREQ
  1802. source "drivers/cpufreq/Kconfig"
  1803. config CPU_FREQ_IMX
  1804. tristate "CPUfreq driver for i.MX CPUs"
  1805. depends on ARCH_MXC && CPU_FREQ
  1806. select CPU_FREQ_TABLE
  1807. help
  1808. This enables the CPUfreq driver for i.MX CPUs.
  1809. config CPU_FREQ_SA1100
  1810. bool
  1811. config CPU_FREQ_SA1110
  1812. bool
  1813. config CPU_FREQ_INTEGRATOR
  1814. tristate "CPUfreq driver for ARM Integrator CPUs"
  1815. depends on ARCH_INTEGRATOR && CPU_FREQ
  1816. default y
  1817. help
  1818. This enables the CPUfreq driver for ARM Integrator CPUs.
  1819. For details, take a look at <file:Documentation/cpu-freq>.
  1820. If in doubt, say Y.
  1821. config CPU_FREQ_PXA
  1822. bool
  1823. depends on CPU_FREQ && ARCH_PXA && PXA25x
  1824. default y
  1825. select CPU_FREQ_TABLE
  1826. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  1827. config CPU_FREQ_S3C
  1828. bool
  1829. help
  1830. Internal configuration node for common cpufreq on Samsung SoC
  1831. config CPU_FREQ_S3C24XX
  1832. bool "CPUfreq driver for Samsung S3C24XX series CPUs (EXPERIMENTAL)"
  1833. depends on ARCH_S3C24XX && CPU_FREQ && EXPERIMENTAL
  1834. select CPU_FREQ_S3C
  1835. help
  1836. This enables the CPUfreq driver for the Samsung S3C24XX family
  1837. of CPUs.
  1838. For details, take a look at <file:Documentation/cpu-freq>.
  1839. If in doubt, say N.
  1840. config CPU_FREQ_S3C24XX_PLL
  1841. bool "Support CPUfreq changing of PLL frequency (EXPERIMENTAL)"
  1842. depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
  1843. help
  1844. Compile in support for changing the PLL frequency from the
  1845. S3C24XX series CPUfreq driver. The PLL takes time to settle
  1846. after a frequency change, so by default it is not enabled.
  1847. This also means that the PLL tables for the selected CPU(s) will
  1848. be built which may increase the size of the kernel image.
  1849. config CPU_FREQ_S3C24XX_DEBUG
  1850. bool "Debug CPUfreq Samsung driver core"
  1851. depends on CPU_FREQ_S3C24XX
  1852. help
  1853. Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
  1854. config CPU_FREQ_S3C24XX_IODEBUG
  1855. bool "Debug CPUfreq Samsung driver IO timing"
  1856. depends on CPU_FREQ_S3C24XX
  1857. help
  1858. Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
  1859. config CPU_FREQ_S3C24XX_DEBUGFS
  1860. bool "Export debugfs for CPUFreq"
  1861. depends on CPU_FREQ_S3C24XX && DEBUG_FS
  1862. help
  1863. Export status information via debugfs.
  1864. endif
  1865. source "drivers/cpuidle/Kconfig"
  1866. endmenu
  1867. menu "Floating point emulation"
  1868. comment "At least one emulation must be selected"
  1869. config FPE_NWFPE
  1870. bool "NWFPE math emulation"
  1871. depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
  1872. ---help---
  1873. Say Y to include the NWFPE floating point emulator in the kernel.
  1874. This is necessary to run most binaries. Linux does not currently
  1875. support floating point hardware so you need to say Y here even if
  1876. your machine has an FPA or floating point co-processor podule.
  1877. You may say N here if you are going to load the Acorn FPEmulator
  1878. early in the bootup.
  1879. config FPE_NWFPE_XP
  1880. bool "Support extended precision"
  1881. depends on FPE_NWFPE
  1882. help
  1883. Say Y to include 80-bit support in the kernel floating-point
  1884. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  1885. Note that gcc does not generate 80-bit operations by default,
  1886. so in most cases this option only enlarges the size of the
  1887. floating point emulator without any good reason.
  1888. You almost surely want to say N here.
  1889. config FPE_FASTFPE
  1890. bool "FastFPE math emulation (EXPERIMENTAL)"
  1891. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  1892. ---help---
  1893. Say Y here to include the FAST floating point emulator in the kernel.
  1894. This is an experimental much faster emulator which now also has full
  1895. precision for the mantissa. It does not support any exceptions.
  1896. It is very simple, and approximately 3-6 times faster than NWFPE.
  1897. It should be sufficient for most programs. It may be not suitable
  1898. for scientific calculations, but you have to check this for yourself.
  1899. If you do not feel you need a faster FP emulation you should better
  1900. choose NWFPE.
  1901. config VFP
  1902. bool "VFP-format floating point maths"
  1903. depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  1904. help
  1905. Say Y to include VFP support code in the kernel. This is needed
  1906. if your hardware includes a VFP unit.
  1907. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  1908. release notes and additional status information.
  1909. Say N if your target does not have VFP hardware.
  1910. config VFPv3
  1911. bool
  1912. depends on VFP
  1913. default y if CPU_V7
  1914. config NEON
  1915. bool "Advanced SIMD (NEON) Extension support"
  1916. depends on VFPv3 && CPU_V7
  1917. help
  1918. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  1919. Extension.
  1920. endmenu
  1921. menu "Userspace binary formats"
  1922. source "fs/Kconfig.binfmt"
  1923. config ARTHUR
  1924. tristate "RISC OS personality"
  1925. depends on !AEABI
  1926. help
  1927. Say Y here to include the kernel code necessary if you want to run
  1928. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  1929. experimental; if this sounds frightening, say N and sleep in peace.
  1930. You can also say M here to compile this support as a module (which
  1931. will be called arthur).
  1932. endmenu
  1933. menu "Power management options"
  1934. source "kernel/power/Kconfig"
  1935. config ARCH_SUSPEND_POSSIBLE
  1936. depends on !ARCH_S5PC100
  1937. depends on CPU_ARM920T || CPU_ARM926T || CPU_SA1100 || \
  1938. CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE || CPU_MOHAWK
  1939. def_bool y
  1940. config ARM_CPU_SUSPEND
  1941. def_bool PM_SLEEP
  1942. endmenu
  1943. source "net/Kconfig"
  1944. source "drivers/Kconfig"
  1945. source "fs/Kconfig"
  1946. source "arch/arm/Kconfig.debug"
  1947. source "security/Kconfig"
  1948. source "crypto/Kconfig"
  1949. source "lib/Kconfig"