Kconfig 64 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_KPROBES if !XIP_KERNEL
  20. select HAVE_KRETPROBES if (HAVE_KPROBES)
  21. select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
  22. select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
  23. select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL)
  24. select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL)
  25. select ARCH_BINFMT_ELF_RANDOMIZE_PIE
  26. select HAVE_GENERIC_DMA_COHERENT
  27. select HAVE_KERNEL_GZIP
  28. select HAVE_KERNEL_LZO
  29. select HAVE_KERNEL_LZMA
  30. select HAVE_KERNEL_XZ
  31. select HAVE_IRQ_WORK
  32. select HAVE_PERF_EVENTS
  33. select PERF_USE_VMALLOC
  34. select HAVE_REGS_AND_STACK_ACCESS_API
  35. select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7))
  36. select HAVE_C_RECORDMCOUNT
  37. select HAVE_GENERIC_HARDIRQS
  38. select HARDIRQS_SW_RESEND
  39. select GENERIC_IRQ_PROBE
  40. select GENERIC_IRQ_SHOW
  41. select ARCH_WANT_IPC_PARSE_VERSION
  42. select HARDIRQS_SW_RESEND
  43. select CPU_PM if (SUSPEND || CPU_IDLE)
  44. select GENERIC_PCI_IOMAP
  45. select HAVE_BPF_JIT
  46. select GENERIC_SMP_IDLE_THREAD
  47. select KTIME_SCALAR
  48. select GENERIC_CLOCKEVENTS_BROADCAST if SMP
  49. select GENERIC_STRNCPY_FROM_USER
  50. select GENERIC_STRNLEN_USER
  51. select DCACHE_WORD_ACCESS if (CPU_V6 || CPU_V6K || CPU_V7) && !CPU_BIG_ENDIAN
  52. help
  53. The ARM series is a line of low-power-consumption RISC chip designs
  54. licensed by ARM Ltd and targeted at embedded applications and
  55. handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
  56. manufactured, but legacy ARM-based PC hardware remains popular in
  57. Europe. There is an ARM Linux project with a web page at
  58. <http://www.arm.linux.org.uk/>.
  59. config ARM_HAS_SG_CHAIN
  60. bool
  61. config NEED_SG_DMA_LENGTH
  62. bool
  63. config ARM_DMA_USE_IOMMU
  64. select NEED_SG_DMA_LENGTH
  65. select ARM_HAS_SG_CHAIN
  66. bool
  67. config HAVE_PWM
  68. bool
  69. config MIGHT_HAVE_PCI
  70. bool
  71. config SYS_SUPPORTS_APM_EMULATION
  72. bool
  73. config GENERIC_GPIO
  74. bool
  75. config HAVE_TCM
  76. bool
  77. select GENERIC_ALLOCATOR
  78. config HAVE_PROC_CPU
  79. bool
  80. config NO_IOPORT
  81. bool
  82. config EISA
  83. bool
  84. ---help---
  85. The Extended Industry Standard Architecture (EISA) bus was
  86. developed as an open alternative to the IBM MicroChannel bus.
  87. The EISA bus provided some of the features of the IBM MicroChannel
  88. bus while maintaining backward compatibility with cards made for
  89. the older ISA bus. The EISA bus saw limited use between 1988 and
  90. 1995 when it was made obsolete by the PCI bus.
  91. Say Y here if you are building a kernel for an EISA-based machine.
  92. Otherwise, say N.
  93. config SBUS
  94. bool
  95. config STACKTRACE_SUPPORT
  96. bool
  97. default y
  98. config HAVE_LATENCYTOP_SUPPORT
  99. bool
  100. depends on !SMP
  101. default y
  102. config LOCKDEP_SUPPORT
  103. bool
  104. default y
  105. config TRACE_IRQFLAGS_SUPPORT
  106. bool
  107. default y
  108. config RWSEM_GENERIC_SPINLOCK
  109. bool
  110. default y
  111. config RWSEM_XCHGADD_ALGORITHM
  112. bool
  113. config ARCH_HAS_ILOG2_U32
  114. bool
  115. config ARCH_HAS_ILOG2_U64
  116. bool
  117. config ARCH_HAS_CPUFREQ
  118. bool
  119. help
  120. Internal node to signify that the ARCH has CPUFREQ support
  121. and that the relevant menu configurations are displayed for
  122. it.
  123. config GENERIC_HWEIGHT
  124. bool
  125. default y
  126. config GENERIC_CALIBRATE_DELAY
  127. bool
  128. default y
  129. config ARCH_MAY_HAVE_PC_FDC
  130. bool
  131. config ZONE_DMA
  132. bool
  133. config NEED_DMA_MAP_STATE
  134. def_bool y
  135. config ARCH_HAS_DMA_SET_COHERENT_MASK
  136. bool
  137. config GENERIC_ISA_DMA
  138. bool
  139. config FIQ
  140. bool
  141. config NEED_RET_TO_USER
  142. bool
  143. config ARCH_MTD_XIP
  144. bool
  145. config VECTORS_BASE
  146. hex
  147. default 0xffff0000 if MMU || CPU_HIGH_VECTOR
  148. default DRAM_BASE if REMAP_VECTORS_TO_RAM
  149. default 0x00000000
  150. help
  151. The base address of exception vectors.
  152. config ARM_PATCH_PHYS_VIRT
  153. bool "Patch physical to virtual translations at runtime" if EMBEDDED
  154. default y
  155. depends on !XIP_KERNEL && MMU
  156. depends on !ARCH_REALVIEW || !SPARSEMEM
  157. help
  158. Patch phys-to-virt and virt-to-phys translation functions at
  159. boot and module load time according to the position of the
  160. kernel in system memory.
  161. This can only be used with non-XIP MMU kernels where the base
  162. of physical memory is at a 16MB boundary.
  163. Only disable this option if you know that you do not require
  164. this feature (eg, building a kernel for a single machine) and
  165. you need to shrink the kernel to the minimal size.
  166. config NEED_MACH_GPIO_H
  167. bool
  168. help
  169. Select this when mach/gpio.h is required to provide special
  170. definitions for this platform. The need for mach/gpio.h should
  171. be avoided when possible.
  172. config NEED_MACH_IO_H
  173. bool
  174. help
  175. Select this when mach/io.h is required to provide special
  176. definitions for this platform. The need for mach/io.h should
  177. be avoided when possible.
  178. config NEED_MACH_MEMORY_H
  179. bool
  180. help
  181. Select this when mach/memory.h is required to provide special
  182. definitions for this platform. The need for mach/memory.h should
  183. be avoided when possible.
  184. config PHYS_OFFSET
  185. hex "Physical address of main memory" if MMU
  186. depends on !ARM_PATCH_PHYS_VIRT && !NEED_MACH_MEMORY_H
  187. default DRAM_BASE if !MMU
  188. help
  189. Please provide the physical address corresponding to the
  190. location of main memory in your system.
  191. config GENERIC_BUG
  192. def_bool y
  193. depends on BUG
  194. source "init/Kconfig"
  195. source "kernel/Kconfig.freezer"
  196. menu "System Type"
  197. config MMU
  198. bool "MMU-based Paged Memory Management Support"
  199. default y
  200. help
  201. Select if you want MMU-based virtualised addressing space
  202. support by paged memory management. If unsure, say 'Y'.
  203. #
  204. # The "ARM system type" choice list is ordered alphabetically by option
  205. # text. Please add new entries in the option alphabetic order.
  206. #
  207. choice
  208. prompt "ARM system type"
  209. default ARCH_MULTIPLATFORM
  210. config ARCH_MULTIPLATFORM
  211. bool "Allow multiple platforms to be selected"
  212. select ARM_PATCH_PHYS_VIRT
  213. select AUTO_ZRELADDR
  214. select COMMON_CLK
  215. select MULTI_IRQ_HANDLER
  216. select SPARSE_IRQ
  217. select USE_OF
  218. depends on MMU
  219. config ARCH_INTEGRATOR
  220. bool "ARM Ltd. Integrator family"
  221. select ARM_AMBA
  222. select ARCH_HAS_CPUFREQ
  223. select COMMON_CLK
  224. select COMMON_CLK_VERSATILE
  225. select HAVE_TCM
  226. select ICST
  227. select GENERIC_CLOCKEVENTS
  228. select PLAT_VERSATILE
  229. select PLAT_VERSATILE_FPGA_IRQ
  230. select NEED_MACH_MEMORY_H
  231. select SPARSE_IRQ
  232. select MULTI_IRQ_HANDLER
  233. help
  234. Support for ARM's Integrator platform.
  235. config ARCH_REALVIEW
  236. bool "ARM Ltd. RealView family"
  237. select ARM_AMBA
  238. select COMMON_CLK
  239. select COMMON_CLK_VERSATILE
  240. select ICST
  241. select GENERIC_CLOCKEVENTS
  242. select ARCH_WANT_OPTIONAL_GPIOLIB
  243. select PLAT_VERSATILE
  244. select PLAT_VERSATILE_CLCD
  245. select ARM_TIMER_SP804
  246. select GPIO_PL061 if GPIOLIB
  247. select NEED_MACH_MEMORY_H
  248. help
  249. This enables support for ARM Ltd RealView boards.
  250. config ARCH_VERSATILE
  251. bool "ARM Ltd. Versatile family"
  252. select ARM_AMBA
  253. select ARM_VIC
  254. select CLKDEV_LOOKUP
  255. select HAVE_MACH_CLKDEV
  256. select ICST
  257. select GENERIC_CLOCKEVENTS
  258. select ARCH_WANT_OPTIONAL_GPIOLIB
  259. select PLAT_VERSATILE
  260. select PLAT_VERSATILE_CLOCK
  261. select PLAT_VERSATILE_CLCD
  262. select PLAT_VERSATILE_FPGA_IRQ
  263. select ARM_TIMER_SP804
  264. help
  265. This enables support for ARM Ltd Versatile board.
  266. config ARCH_AT91
  267. bool "Atmel AT91"
  268. select ARCH_REQUIRE_GPIOLIB
  269. select HAVE_CLK
  270. select CLKDEV_LOOKUP
  271. select IRQ_DOMAIN
  272. select NEED_MACH_GPIO_H
  273. select NEED_MACH_IO_H if PCCARD
  274. help
  275. This enables support for systems based on Atmel
  276. AT91RM9200 and AT91SAM9* processors.
  277. config ARCH_BCM2835
  278. bool "Broadcom BCM2835 family"
  279. select ARCH_WANT_OPTIONAL_GPIOLIB
  280. select ARM_AMBA
  281. select ARM_ERRATA_411920
  282. select ARM_TIMER_SP804
  283. select CLKDEV_LOOKUP
  284. select COMMON_CLK
  285. select CPU_V6
  286. select GENERIC_CLOCKEVENTS
  287. select MULTI_IRQ_HANDLER
  288. select SPARSE_IRQ
  289. select USE_OF
  290. help
  291. This enables support for the Broadcom BCM2835 SoC. This SoC is
  292. use in the Raspberry Pi, and Roku 2 devices.
  293. config ARCH_CLPS711X
  294. bool "Cirrus Logic CLPS711x/EP721x/EP731x-based"
  295. select CPU_ARM720T
  296. select ARCH_USES_GETTIMEOFFSET
  297. select COMMON_CLK
  298. select CLKDEV_LOOKUP
  299. select NEED_MACH_MEMORY_H
  300. help
  301. Support for Cirrus Logic 711x/721x/731x based boards.
  302. config ARCH_CNS3XXX
  303. bool "Cavium Networks CNS3XXX family"
  304. select CPU_V6K
  305. select GENERIC_CLOCKEVENTS
  306. select ARM_GIC
  307. select MIGHT_HAVE_CACHE_L2X0
  308. select MIGHT_HAVE_PCI
  309. select PCI_DOMAINS if PCI
  310. help
  311. Support for Cavium Networks CNS3XXX platform.
  312. config ARCH_GEMINI
  313. bool "Cortina Systems Gemini"
  314. select CPU_FA526
  315. select ARCH_REQUIRE_GPIOLIB
  316. select ARCH_USES_GETTIMEOFFSET
  317. help
  318. Support for the Cortina Systems Gemini family SoCs
  319. config ARCH_SIRF
  320. bool "CSR SiRF"
  321. select NO_IOPORT
  322. select ARCH_REQUIRE_GPIOLIB
  323. select GENERIC_CLOCKEVENTS
  324. select COMMON_CLK
  325. select GENERIC_IRQ_CHIP
  326. select MIGHT_HAVE_CACHE_L2X0
  327. select PINCTRL
  328. select PINCTRL_SIRF
  329. select USE_OF
  330. help
  331. Support for CSR SiRFprimaII/Marco/Polo platforms
  332. config ARCH_EBSA110
  333. bool "EBSA-110"
  334. select CPU_SA110
  335. select ISA
  336. select NO_IOPORT
  337. select ARCH_USES_GETTIMEOFFSET
  338. select NEED_MACH_IO_H
  339. select NEED_MACH_MEMORY_H
  340. help
  341. This is an evaluation board for the StrongARM processor available
  342. from Digital. It has limited hardware on-board, including an
  343. Ethernet interface, two PCMCIA sockets, two serial ports and a
  344. parallel port.
  345. config ARCH_EP93XX
  346. bool "EP93xx-based"
  347. select CPU_ARM920T
  348. select ARM_AMBA
  349. select ARM_VIC
  350. select CLKDEV_LOOKUP
  351. select ARCH_REQUIRE_GPIOLIB
  352. select ARCH_HAS_HOLES_MEMORYMODEL
  353. select ARCH_USES_GETTIMEOFFSET
  354. select NEED_MACH_MEMORY_H
  355. help
  356. This enables support for the Cirrus EP93xx series of CPUs.
  357. config ARCH_FOOTBRIDGE
  358. bool "FootBridge"
  359. select CPU_SA110
  360. select FOOTBRIDGE
  361. select GENERIC_CLOCKEVENTS
  362. select HAVE_IDE
  363. select NEED_MACH_IO_H if !MMU
  364. select NEED_MACH_MEMORY_H
  365. help
  366. Support for systems based on the DC21285 companion chip
  367. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  368. config ARCH_MXC
  369. bool "Freescale MXC/iMX-based"
  370. select GENERIC_CLOCKEVENTS
  371. select ARCH_REQUIRE_GPIOLIB
  372. select CLKDEV_LOOKUP
  373. select CLKSRC_MMIO
  374. select GENERIC_IRQ_CHIP
  375. select MULTI_IRQ_HANDLER
  376. select SPARSE_IRQ
  377. select USE_OF
  378. help
  379. Support for Freescale MXC/iMX-based family of processors
  380. config ARCH_MXS
  381. bool "Freescale MXS-based"
  382. select GENERIC_CLOCKEVENTS
  383. select ARCH_REQUIRE_GPIOLIB
  384. select CLKDEV_LOOKUP
  385. select CLKSRC_MMIO
  386. select COMMON_CLK
  387. select HAVE_CLK_PREPARE
  388. select MULTI_IRQ_HANDLER
  389. select PINCTRL
  390. select SPARSE_IRQ
  391. select USE_OF
  392. help
  393. Support for Freescale MXS-based family of processors
  394. config ARCH_NETX
  395. bool "Hilscher NetX based"
  396. select CLKSRC_MMIO
  397. select CPU_ARM926T
  398. select ARM_VIC
  399. select GENERIC_CLOCKEVENTS
  400. help
  401. This enables support for systems based on the Hilscher NetX Soc
  402. config ARCH_H720X
  403. bool "Hynix HMS720x-based"
  404. select CPU_ARM720T
  405. select ISA_DMA_API
  406. select ARCH_USES_GETTIMEOFFSET
  407. help
  408. This enables support for systems based on the Hynix HMS720x
  409. config ARCH_IOP13XX
  410. bool "IOP13xx-based"
  411. depends on MMU
  412. select CPU_XSC3
  413. select PLAT_IOP
  414. select PCI
  415. select ARCH_SUPPORTS_MSI
  416. select VMSPLIT_1G
  417. select NEED_MACH_MEMORY_H
  418. select NEED_RET_TO_USER
  419. help
  420. Support for Intel's IOP13XX (XScale) family of processors.
  421. config ARCH_IOP32X
  422. bool "IOP32x-based"
  423. depends on MMU
  424. select CPU_XSCALE
  425. select NEED_MACH_GPIO_H
  426. select NEED_MACH_IO_H
  427. select NEED_RET_TO_USER
  428. select PLAT_IOP
  429. select PCI
  430. select ARCH_REQUIRE_GPIOLIB
  431. help
  432. Support for Intel's 80219 and IOP32X (XScale) family of
  433. processors.
  434. config ARCH_IOP33X
  435. bool "IOP33x-based"
  436. depends on MMU
  437. select CPU_XSCALE
  438. select NEED_MACH_GPIO_H
  439. select NEED_MACH_IO_H
  440. select NEED_RET_TO_USER
  441. select PLAT_IOP
  442. select PCI
  443. select ARCH_REQUIRE_GPIOLIB
  444. help
  445. Support for Intel's IOP33X (XScale) family of processors.
  446. config ARCH_IXP4XX
  447. bool "IXP4xx-based"
  448. depends on MMU
  449. select ARCH_HAS_DMA_SET_COHERENT_MASK
  450. select CLKSRC_MMIO
  451. select CPU_XSCALE
  452. select ARCH_REQUIRE_GPIOLIB
  453. select GENERIC_CLOCKEVENTS
  454. select MIGHT_HAVE_PCI
  455. select NEED_MACH_IO_H
  456. select DMABOUNCE if PCI
  457. help
  458. Support for Intel's IXP4XX (XScale) family of processors.
  459. config ARCH_DOVE
  460. bool "Marvell Dove"
  461. select CPU_V7
  462. select PCI
  463. select ARCH_REQUIRE_GPIOLIB
  464. select GENERIC_CLOCKEVENTS
  465. select PLAT_ORION
  466. help
  467. Support for the Marvell Dove SoC 88AP510
  468. config ARCH_KIRKWOOD
  469. bool "Marvell Kirkwood"
  470. select CPU_FEROCEON
  471. select PCI
  472. select ARCH_REQUIRE_GPIOLIB
  473. select GENERIC_CLOCKEVENTS
  474. select PLAT_ORION
  475. help
  476. Support for the following Marvell Kirkwood series SoCs:
  477. 88F6180, 88F6192 and 88F6281.
  478. config ARCH_LPC32XX
  479. bool "NXP LPC32XX"
  480. select CLKSRC_MMIO
  481. select CPU_ARM926T
  482. select ARCH_REQUIRE_GPIOLIB
  483. select HAVE_IDE
  484. select ARM_AMBA
  485. select USB_ARCH_HAS_OHCI
  486. select CLKDEV_LOOKUP
  487. select GENERIC_CLOCKEVENTS
  488. select USE_OF
  489. select HAVE_PWM
  490. help
  491. Support for the NXP LPC32XX family of processors
  492. config ARCH_MV78XX0
  493. bool "Marvell MV78xx0"
  494. select CPU_FEROCEON
  495. select PCI
  496. select ARCH_REQUIRE_GPIOLIB
  497. select GENERIC_CLOCKEVENTS
  498. select PLAT_ORION
  499. help
  500. Support for the following Marvell MV78xx0 series SoCs:
  501. MV781x0, MV782x0.
  502. config ARCH_ORION5X
  503. bool "Marvell Orion"
  504. depends on MMU
  505. select CPU_FEROCEON
  506. select PCI
  507. select ARCH_REQUIRE_GPIOLIB
  508. select GENERIC_CLOCKEVENTS
  509. select PLAT_ORION
  510. help
  511. Support for the following Marvell Orion 5x series SoCs:
  512. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  513. Orion-2 (5281), Orion-1-90 (6183).
  514. config ARCH_MMP
  515. bool "Marvell PXA168/910/MMP2"
  516. depends on MMU
  517. select ARCH_REQUIRE_GPIOLIB
  518. select CLKDEV_LOOKUP
  519. select GENERIC_CLOCKEVENTS
  520. select GPIO_PXA
  521. select IRQ_DOMAIN
  522. select PLAT_PXA
  523. select SPARSE_IRQ
  524. select GENERIC_ALLOCATOR
  525. select NEED_MACH_GPIO_H
  526. help
  527. Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
  528. config ARCH_KS8695
  529. bool "Micrel/Kendin KS8695"
  530. select CPU_ARM922T
  531. select ARCH_REQUIRE_GPIOLIB
  532. select NEED_MACH_MEMORY_H
  533. select CLKSRC_MMIO
  534. select GENERIC_CLOCKEVENTS
  535. help
  536. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  537. System-on-Chip devices.
  538. config ARCH_W90X900
  539. bool "Nuvoton W90X900 CPU"
  540. select CPU_ARM926T
  541. select ARCH_REQUIRE_GPIOLIB
  542. select CLKDEV_LOOKUP
  543. select CLKSRC_MMIO
  544. select GENERIC_CLOCKEVENTS
  545. help
  546. Support for Nuvoton (Winbond logic dept.) ARM9 processor,
  547. At present, the w90x900 has been renamed nuc900, regarding
  548. the ARM series product line, you can login the following
  549. link address to know more.
  550. <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
  551. ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
  552. config ARCH_TEGRA
  553. bool "NVIDIA Tegra"
  554. select CLKDEV_LOOKUP
  555. select CLKSRC_MMIO
  556. select GENERIC_CLOCKEVENTS
  557. select GENERIC_GPIO
  558. select HAVE_CLK
  559. select HAVE_SMP
  560. select MIGHT_HAVE_CACHE_L2X0
  561. select ARCH_HAS_CPUFREQ
  562. select USE_OF
  563. select COMMON_CLK
  564. help
  565. This enables support for NVIDIA Tegra based systems (Tegra APX,
  566. Tegra 6xx and Tegra 2 series).
  567. config ARCH_PXA
  568. bool "PXA2xx/PXA3xx-based"
  569. depends on MMU
  570. select ARCH_MTD_XIP
  571. select ARCH_HAS_CPUFREQ
  572. select CLKDEV_LOOKUP
  573. select CLKSRC_MMIO
  574. select ARCH_REQUIRE_GPIOLIB
  575. select GENERIC_CLOCKEVENTS
  576. select GPIO_PXA
  577. select PLAT_PXA
  578. select SPARSE_IRQ
  579. select AUTO_ZRELADDR
  580. select MULTI_IRQ_HANDLER
  581. select ARM_CPU_SUSPEND if PM
  582. select HAVE_IDE
  583. select NEED_MACH_GPIO_H
  584. help
  585. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  586. config ARCH_MSM
  587. bool "Qualcomm MSM"
  588. select HAVE_CLK
  589. select GENERIC_CLOCKEVENTS
  590. select ARCH_REQUIRE_GPIOLIB
  591. select CLKDEV_LOOKUP
  592. help
  593. Support for Qualcomm MSM/QSD based systems. This runs on the
  594. apps processor of the MSM/QSD and depends on a shared memory
  595. interface to the modem processor which runs the baseband
  596. stack and controls some vital subsystems
  597. (clock and power control, etc).
  598. config ARCH_SHMOBILE
  599. bool "Renesas SH-Mobile / R-Mobile"
  600. select HAVE_CLK
  601. select CLKDEV_LOOKUP
  602. select HAVE_MACH_CLKDEV
  603. select HAVE_SMP
  604. select GENERIC_CLOCKEVENTS
  605. select MIGHT_HAVE_CACHE_L2X0
  606. select NO_IOPORT
  607. select SPARSE_IRQ
  608. select MULTI_IRQ_HANDLER
  609. select PM_GENERIC_DOMAINS if PM
  610. select NEED_MACH_MEMORY_H
  611. help
  612. Support for Renesas's SH-Mobile and R-Mobile ARM platforms.
  613. config ARCH_RPC
  614. bool "RiscPC"
  615. select ARCH_ACORN
  616. select FIQ
  617. select ARCH_MAY_HAVE_PC_FDC
  618. select HAVE_PATA_PLATFORM
  619. select ISA_DMA_API
  620. select NO_IOPORT
  621. select ARCH_SPARSEMEM_ENABLE
  622. select ARCH_USES_GETTIMEOFFSET
  623. select HAVE_IDE
  624. select NEED_MACH_IO_H
  625. select NEED_MACH_MEMORY_H
  626. help
  627. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  628. CD-ROM interface, serial and parallel port, and the floppy drive.
  629. config ARCH_SA1100
  630. bool "SA1100-based"
  631. select CLKSRC_MMIO
  632. select CPU_SA1100
  633. select ISA
  634. select ARCH_SPARSEMEM_ENABLE
  635. select ARCH_MTD_XIP
  636. select ARCH_HAS_CPUFREQ
  637. select CPU_FREQ
  638. select GENERIC_CLOCKEVENTS
  639. select CLKDEV_LOOKUP
  640. select ARCH_REQUIRE_GPIOLIB
  641. select HAVE_IDE
  642. select NEED_MACH_GPIO_H
  643. select NEED_MACH_MEMORY_H
  644. select SPARSE_IRQ
  645. help
  646. Support for StrongARM 11x0 based boards.
  647. config ARCH_S3C24XX
  648. bool "Samsung S3C24XX SoCs"
  649. select GENERIC_GPIO
  650. select ARCH_HAS_CPUFREQ
  651. select HAVE_CLK
  652. select CLKDEV_LOOKUP
  653. select ARCH_USES_GETTIMEOFFSET
  654. select HAVE_S3C2410_I2C if I2C
  655. select HAVE_S3C_RTC if RTC_CLASS
  656. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  657. select NEED_MACH_GPIO_H
  658. select NEED_MACH_IO_H
  659. help
  660. Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443
  661. and S3C2450 SoCs based systems, such as the Simtec Electronics BAST
  662. (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or the
  663. Samsung SMDK2410 development board (and derivatives).
  664. config ARCH_S3C64XX
  665. bool "Samsung S3C64XX"
  666. select PLAT_SAMSUNG
  667. select CPU_V6
  668. select ARM_VIC
  669. select HAVE_CLK
  670. select HAVE_TCM
  671. select CLKDEV_LOOKUP
  672. select NO_IOPORT
  673. select ARCH_USES_GETTIMEOFFSET
  674. select ARCH_HAS_CPUFREQ
  675. select ARCH_REQUIRE_GPIOLIB
  676. select SAMSUNG_CLKSRC
  677. select SAMSUNG_IRQ_VIC_TIMER
  678. select S3C_GPIO_TRACK
  679. select S3C_DEV_NAND
  680. select USB_ARCH_HAS_OHCI
  681. select SAMSUNG_GPIOLIB_4BIT
  682. select HAVE_S3C2410_I2C if I2C
  683. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  684. select NEED_MACH_GPIO_H
  685. help
  686. Samsung S3C64XX series based systems
  687. config ARCH_S5P64X0
  688. bool "Samsung S5P6440 S5P6450"
  689. select CPU_V6
  690. select GENERIC_GPIO
  691. select HAVE_CLK
  692. select CLKDEV_LOOKUP
  693. select CLKSRC_MMIO
  694. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  695. select GENERIC_CLOCKEVENTS
  696. select HAVE_S3C2410_I2C if I2C
  697. select HAVE_S3C_RTC if RTC_CLASS
  698. select NEED_MACH_GPIO_H
  699. help
  700. Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
  701. SMDK6450.
  702. config ARCH_S5PC100
  703. bool "Samsung S5PC100"
  704. select GENERIC_GPIO
  705. select HAVE_CLK
  706. select CLKDEV_LOOKUP
  707. select CPU_V7
  708. select ARCH_USES_GETTIMEOFFSET
  709. select HAVE_S3C2410_I2C if I2C
  710. select HAVE_S3C_RTC if RTC_CLASS
  711. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  712. select NEED_MACH_GPIO_H
  713. help
  714. Samsung S5PC100 series based systems
  715. config ARCH_S5PV210
  716. bool "Samsung S5PV210/S5PC110"
  717. select CPU_V7
  718. select ARCH_SPARSEMEM_ENABLE
  719. select ARCH_HAS_HOLES_MEMORYMODEL
  720. select GENERIC_GPIO
  721. select HAVE_CLK
  722. select CLKDEV_LOOKUP
  723. select CLKSRC_MMIO
  724. select ARCH_HAS_CPUFREQ
  725. select GENERIC_CLOCKEVENTS
  726. select HAVE_S3C2410_I2C if I2C
  727. select HAVE_S3C_RTC if RTC_CLASS
  728. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  729. select NEED_MACH_GPIO_H
  730. select NEED_MACH_MEMORY_H
  731. help
  732. Samsung S5PV210/S5PC110 series based systems
  733. config ARCH_EXYNOS
  734. bool "SAMSUNG EXYNOS"
  735. select CPU_V7
  736. select ARCH_SPARSEMEM_ENABLE
  737. select ARCH_HAS_HOLES_MEMORYMODEL
  738. select GENERIC_GPIO
  739. select HAVE_CLK
  740. select CLKDEV_LOOKUP
  741. select ARCH_HAS_CPUFREQ
  742. select GENERIC_CLOCKEVENTS
  743. select HAVE_S3C_RTC if RTC_CLASS
  744. select HAVE_S3C2410_I2C if I2C
  745. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  746. select NEED_MACH_GPIO_H
  747. select NEED_MACH_MEMORY_H
  748. help
  749. Support for SAMSUNG's EXYNOS SoCs (EXYNOS4/5)
  750. config ARCH_SHARK
  751. bool "Shark"
  752. select CPU_SA110
  753. select ISA
  754. select ISA_DMA
  755. select ZONE_DMA
  756. select PCI
  757. select ARCH_USES_GETTIMEOFFSET
  758. select NEED_MACH_MEMORY_H
  759. help
  760. Support for the StrongARM based Digital DNARD machine, also known
  761. as "Shark" (<http://www.shark-linux.de/shark.html>).
  762. config ARCH_U300
  763. bool "ST-Ericsson U300 Series"
  764. depends on MMU
  765. select CLKSRC_MMIO
  766. select CPU_ARM926T
  767. select HAVE_TCM
  768. select ARM_AMBA
  769. select ARM_PATCH_PHYS_VIRT
  770. select ARM_VIC
  771. select GENERIC_CLOCKEVENTS
  772. select CLKDEV_LOOKUP
  773. select COMMON_CLK
  774. select GENERIC_GPIO
  775. select ARCH_REQUIRE_GPIOLIB
  776. select SPARSE_IRQ
  777. help
  778. Support for ST-Ericsson U300 series mobile platforms.
  779. config ARCH_U8500
  780. bool "ST-Ericsson U8500 Series"
  781. depends on MMU
  782. select CPU_V7
  783. select ARM_AMBA
  784. select GENERIC_CLOCKEVENTS
  785. select CLKDEV_LOOKUP
  786. select ARCH_REQUIRE_GPIOLIB
  787. select ARCH_HAS_CPUFREQ
  788. select HAVE_SMP
  789. select MIGHT_HAVE_CACHE_L2X0
  790. help
  791. Support for ST-Ericsson's Ux500 architecture
  792. config ARCH_NOMADIK
  793. bool "STMicroelectronics Nomadik"
  794. select ARM_AMBA
  795. select ARM_VIC
  796. select CPU_ARM926T
  797. select COMMON_CLK
  798. select GENERIC_CLOCKEVENTS
  799. select PINCTRL
  800. select PINCTRL_STN8815
  801. select MIGHT_HAVE_CACHE_L2X0
  802. select ARCH_REQUIRE_GPIOLIB
  803. help
  804. Support for the Nomadik platform by ST-Ericsson
  805. config ARCH_DAVINCI
  806. bool "TI DaVinci"
  807. select GENERIC_CLOCKEVENTS
  808. select ARCH_REQUIRE_GPIOLIB
  809. select ZONE_DMA
  810. select HAVE_IDE
  811. select CLKDEV_LOOKUP
  812. select GENERIC_ALLOCATOR
  813. select GENERIC_IRQ_CHIP
  814. select ARCH_HAS_HOLES_MEMORYMODEL
  815. select NEED_MACH_GPIO_H
  816. help
  817. Support for TI's DaVinci platform.
  818. config ARCH_OMAP
  819. bool "TI OMAP"
  820. depends on MMU
  821. select HAVE_CLK
  822. select ARCH_REQUIRE_GPIOLIB
  823. select ARCH_HAS_CPUFREQ
  824. select CLKSRC_MMIO
  825. select GENERIC_CLOCKEVENTS
  826. select ARCH_HAS_HOLES_MEMORYMODEL
  827. select NEED_MACH_GPIO_H
  828. help
  829. Support for TI's OMAP platform (OMAP1/2/3/4).
  830. config PLAT_SPEAR
  831. bool "ST SPEAr"
  832. select ARM_AMBA
  833. select ARCH_REQUIRE_GPIOLIB
  834. select CLKDEV_LOOKUP
  835. select COMMON_CLK
  836. select CLKSRC_MMIO
  837. select GENERIC_CLOCKEVENTS
  838. select HAVE_CLK
  839. help
  840. Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
  841. config ARCH_VT8500
  842. bool "VIA/WonderMedia 85xx"
  843. select CPU_ARM926T
  844. select GENERIC_GPIO
  845. select ARCH_HAS_CPUFREQ
  846. select GENERIC_CLOCKEVENTS
  847. select ARCH_REQUIRE_GPIOLIB
  848. select USE_OF
  849. select COMMON_CLK
  850. select HAVE_CLK
  851. select CLKDEV_LOOKUP
  852. help
  853. Support for VIA/WonderMedia VT8500/WM85xx System-on-Chip.
  854. config ARCH_ZYNQ
  855. bool "Xilinx Zynq ARM Cortex A9 Platform"
  856. select CPU_V7
  857. select GENERIC_CLOCKEVENTS
  858. select CLKDEV_LOOKUP
  859. select ARM_GIC
  860. select ARM_AMBA
  861. select ICST
  862. select MIGHT_HAVE_CACHE_L2X0
  863. select USE_OF
  864. help
  865. Support for Xilinx Zynq ARM Cortex A9 Platform
  866. endchoice
  867. menu "Multiple platform selection"
  868. depends on ARCH_MULTIPLATFORM
  869. comment "CPU Core family selection"
  870. config ARCH_MULTI_V4
  871. bool "ARMv4 based platforms (FA526, StrongARM)"
  872. select ARCH_MULTI_V4_V5
  873. depends on !ARCH_MULTI_V6_V7
  874. config ARCH_MULTI_V4T
  875. bool "ARMv4T based platforms (ARM720T, ARM920T, ...)"
  876. select ARCH_MULTI_V4_V5
  877. depends on !ARCH_MULTI_V6_V7
  878. config ARCH_MULTI_V5
  879. bool "ARMv5 based platforms (ARM926T, XSCALE, PJ1, ...)"
  880. select ARCH_MULTI_V4_V5
  881. depends on !ARCH_MULTI_V6_V7
  882. config ARCH_MULTI_V4_V5
  883. bool
  884. config ARCH_MULTI_V6
  885. bool "ARMv6 based platforms (ARM11, Scorpion, ...)"
  886. select CPU_V6
  887. select ARCH_MULTI_V6_V7
  888. config ARCH_MULTI_V7
  889. bool "ARMv7 based platforms (Cortex-A, PJ4, Krait)"
  890. select CPU_V7
  891. select ARCH_VEXPRESS
  892. default y
  893. select ARCH_MULTI_V6_V7
  894. config ARCH_MULTI_V6_V7
  895. bool
  896. config ARCH_MULTI_CPU_AUTO
  897. def_bool !(ARCH_MULTI_V4 || ARCH_MULTI_V4T || ARCH_MULTI_V6_V7)
  898. select ARCH_MULTI_V5
  899. endmenu
  900. #
  901. # This is sorted alphabetically by mach-* pathname. However, plat-*
  902. # Kconfigs may be included either alphabetically (according to the
  903. # plat- suffix) or along side the corresponding mach-* source.
  904. #
  905. source "arch/arm/mach-mvebu/Kconfig"
  906. source "arch/arm/mach-at91/Kconfig"
  907. source "arch/arm/mach-clps711x/Kconfig"
  908. source "arch/arm/mach-cns3xxx/Kconfig"
  909. source "arch/arm/mach-davinci/Kconfig"
  910. source "arch/arm/mach-dove/Kconfig"
  911. source "arch/arm/mach-ep93xx/Kconfig"
  912. source "arch/arm/mach-footbridge/Kconfig"
  913. source "arch/arm/mach-gemini/Kconfig"
  914. source "arch/arm/mach-h720x/Kconfig"
  915. source "arch/arm/mach-highbank/Kconfig"
  916. source "arch/arm/mach-integrator/Kconfig"
  917. source "arch/arm/mach-iop32x/Kconfig"
  918. source "arch/arm/mach-iop33x/Kconfig"
  919. source "arch/arm/mach-iop13xx/Kconfig"
  920. source "arch/arm/mach-ixp4xx/Kconfig"
  921. source "arch/arm/mach-kirkwood/Kconfig"
  922. source "arch/arm/mach-ks8695/Kconfig"
  923. source "arch/arm/mach-msm/Kconfig"
  924. source "arch/arm/mach-mv78xx0/Kconfig"
  925. source "arch/arm/plat-mxc/Kconfig"
  926. source "arch/arm/mach-mxs/Kconfig"
  927. source "arch/arm/mach-netx/Kconfig"
  928. source "arch/arm/mach-nomadik/Kconfig"
  929. source "arch/arm/plat-nomadik/Kconfig"
  930. source "arch/arm/plat-omap/Kconfig"
  931. source "arch/arm/mach-omap1/Kconfig"
  932. source "arch/arm/mach-omap2/Kconfig"
  933. source "arch/arm/mach-orion5x/Kconfig"
  934. source "arch/arm/mach-picoxcell/Kconfig"
  935. source "arch/arm/mach-pxa/Kconfig"
  936. source "arch/arm/plat-pxa/Kconfig"
  937. source "arch/arm/mach-mmp/Kconfig"
  938. source "arch/arm/mach-realview/Kconfig"
  939. source "arch/arm/mach-sa1100/Kconfig"
  940. source "arch/arm/plat-samsung/Kconfig"
  941. source "arch/arm/plat-s3c24xx/Kconfig"
  942. source "arch/arm/mach-socfpga/Kconfig"
  943. source "arch/arm/plat-spear/Kconfig"
  944. source "arch/arm/mach-s3c24xx/Kconfig"
  945. if ARCH_S3C24XX
  946. source "arch/arm/mach-s3c2412/Kconfig"
  947. source "arch/arm/mach-s3c2440/Kconfig"
  948. endif
  949. if ARCH_S3C64XX
  950. source "arch/arm/mach-s3c64xx/Kconfig"
  951. endif
  952. source "arch/arm/mach-s5p64x0/Kconfig"
  953. source "arch/arm/mach-s5pc100/Kconfig"
  954. source "arch/arm/mach-s5pv210/Kconfig"
  955. source "arch/arm/mach-exynos/Kconfig"
  956. source "arch/arm/mach-shmobile/Kconfig"
  957. source "arch/arm/mach-prima2/Kconfig"
  958. source "arch/arm/mach-tegra/Kconfig"
  959. source "arch/arm/mach-u300/Kconfig"
  960. source "arch/arm/mach-ux500/Kconfig"
  961. source "arch/arm/mach-versatile/Kconfig"
  962. source "arch/arm/mach-vexpress/Kconfig"
  963. source "arch/arm/plat-versatile/Kconfig"
  964. source "arch/arm/mach-w90x900/Kconfig"
  965. # Definitions to make life easier
  966. config ARCH_ACORN
  967. bool
  968. config PLAT_IOP
  969. bool
  970. select GENERIC_CLOCKEVENTS
  971. config PLAT_ORION
  972. bool
  973. select CLKSRC_MMIO
  974. select GENERIC_IRQ_CHIP
  975. select IRQ_DOMAIN
  976. select COMMON_CLK
  977. config PLAT_PXA
  978. bool
  979. config PLAT_VERSATILE
  980. bool
  981. config ARM_TIMER_SP804
  982. bool
  983. select CLKSRC_MMIO
  984. select HAVE_SCHED_CLOCK
  985. source arch/arm/mm/Kconfig
  986. config ARM_NR_BANKS
  987. int
  988. default 16 if ARCH_EP93XX
  989. default 8
  990. config IWMMXT
  991. bool "Enable iWMMXt support"
  992. depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
  993. default y if PXA27x || PXA3xx || PXA95x || ARCH_MMP
  994. help
  995. Enable support for iWMMXt context switching at run time if
  996. running on a CPU that supports it.
  997. config XSCALE_PMU
  998. bool
  999. depends on CPU_XSCALE
  1000. default y
  1001. config MULTI_IRQ_HANDLER
  1002. bool
  1003. help
  1004. Allow each machine to specify it's own IRQ handler at run time.
  1005. if !MMU
  1006. source "arch/arm/Kconfig-nommu"
  1007. endif
  1008. config ARM_ERRATA_326103
  1009. bool "ARM errata: FSR write bit incorrect on a SWP to read-only memory"
  1010. depends on CPU_V6
  1011. help
  1012. Executing a SWP instruction to read-only memory does not set bit 11
  1013. of the FSR on the ARM 1136 prior to r1p0. This causes the kernel to
  1014. treat the access as a read, preventing a COW from occurring and
  1015. causing the faulting task to livelock.
  1016. config ARM_ERRATA_411920
  1017. bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
  1018. depends on CPU_V6 || CPU_V6K
  1019. help
  1020. Invalidation of the Instruction Cache operation can
  1021. fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
  1022. It does not affect the MPCore. This option enables the ARM Ltd.
  1023. recommended workaround.
  1024. config ARM_ERRATA_430973
  1025. bool "ARM errata: Stale prediction on replaced interworking branch"
  1026. depends on CPU_V7
  1027. help
  1028. This option enables the workaround for the 430973 Cortex-A8
  1029. (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
  1030. interworking branch is replaced with another code sequence at the
  1031. same virtual address, whether due to self-modifying code or virtual
  1032. to physical address re-mapping, Cortex-A8 does not recover from the
  1033. stale interworking branch prediction. This results in Cortex-A8
  1034. executing the new code sequence in the incorrect ARM or Thumb state.
  1035. The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
  1036. and also flushes the branch target cache at every context switch.
  1037. Note that setting specific bits in the ACTLR register may not be
  1038. available in non-secure mode.
  1039. config ARM_ERRATA_458693
  1040. bool "ARM errata: Processor deadlock when a false hazard is created"
  1041. depends on CPU_V7
  1042. help
  1043. This option enables the workaround for the 458693 Cortex-A8 (r2p0)
  1044. erratum. For very specific sequences of memory operations, it is
  1045. possible for a hazard condition intended for a cache line to instead
  1046. be incorrectly associated with a different cache line. This false
  1047. hazard might then cause a processor deadlock. The workaround enables
  1048. the L1 caching of the NEON accesses and disables the PLD instruction
  1049. in the ACTLR register. Note that setting specific bits in the ACTLR
  1050. register may not be available in non-secure mode.
  1051. config ARM_ERRATA_460075
  1052. bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
  1053. depends on CPU_V7
  1054. help
  1055. This option enables the workaround for the 460075 Cortex-A8 (r2p0)
  1056. erratum. Any asynchronous access to the L2 cache may encounter a
  1057. situation in which recent store transactions to the L2 cache are lost
  1058. and overwritten with stale memory contents from external memory. The
  1059. workaround disables the write-allocate mode for the L2 cache via the
  1060. ACTLR register. Note that setting specific bits in the ACTLR register
  1061. may not be available in non-secure mode.
  1062. config ARM_ERRATA_742230
  1063. bool "ARM errata: DMB operation may be faulty"
  1064. depends on CPU_V7 && SMP
  1065. help
  1066. This option enables the workaround for the 742230 Cortex-A9
  1067. (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
  1068. between two write operations may not ensure the correct visibility
  1069. ordering of the two writes. This workaround sets a specific bit in
  1070. the diagnostic register of the Cortex-A9 which causes the DMB
  1071. instruction to behave as a DSB, ensuring the correct behaviour of
  1072. the two writes.
  1073. config ARM_ERRATA_742231
  1074. bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
  1075. depends on CPU_V7 && SMP
  1076. help
  1077. This option enables the workaround for the 742231 Cortex-A9
  1078. (r2p0..r2p2) erratum. Under certain conditions, specific to the
  1079. Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
  1080. accessing some data located in the same cache line, may get corrupted
  1081. data due to bad handling of the address hazard when the line gets
  1082. replaced from one of the CPUs at the same time as another CPU is
  1083. accessing it. This workaround sets specific bits in the diagnostic
  1084. register of the Cortex-A9 which reduces the linefill issuing
  1085. capabilities of the processor.
  1086. config PL310_ERRATA_588369
  1087. bool "PL310 errata: Clean & Invalidate maintenance operations do not invalidate clean lines"
  1088. depends on CACHE_L2X0
  1089. help
  1090. The PL310 L2 cache controller implements three types of Clean &
  1091. Invalidate maintenance operations: by Physical Address
  1092. (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
  1093. They are architecturally defined to behave as the execution of a
  1094. clean operation followed immediately by an invalidate operation,
  1095. both performing to the same memory location. This functionality
  1096. is not correctly implemented in PL310 as clean lines are not
  1097. invalidated as a result of these operations.
  1098. config ARM_ERRATA_720789
  1099. bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
  1100. depends on CPU_V7
  1101. help
  1102. This option enables the workaround for the 720789 Cortex-A9 (prior to
  1103. r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
  1104. broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
  1105. As a consequence of this erratum, some TLB entries which should be
  1106. invalidated are not, resulting in an incoherency in the system page
  1107. tables. The workaround changes the TLB flushing routines to invalidate
  1108. entries regardless of the ASID.
  1109. config PL310_ERRATA_727915
  1110. bool "PL310 errata: Background Clean & Invalidate by Way operation can cause data corruption"
  1111. depends on CACHE_L2X0
  1112. help
  1113. PL310 implements the Clean & Invalidate by Way L2 cache maintenance
  1114. operation (offset 0x7FC). This operation runs in background so that
  1115. PL310 can handle normal accesses while it is in progress. Under very
  1116. rare circumstances, due to this erratum, write data can be lost when
  1117. PL310 treats a cacheable write transaction during a Clean &
  1118. Invalidate by Way operation.
  1119. config ARM_ERRATA_743622
  1120. bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
  1121. depends on CPU_V7
  1122. help
  1123. This option enables the workaround for the 743622 Cortex-A9
  1124. (r2p*) erratum. Under very rare conditions, a faulty
  1125. optimisation in the Cortex-A9 Store Buffer may lead to data
  1126. corruption. This workaround sets a specific bit in the diagnostic
  1127. register of the Cortex-A9 which disables the Store Buffer
  1128. optimisation, preventing the defect from occurring. This has no
  1129. visible impact on the overall performance or power consumption of the
  1130. processor.
  1131. config ARM_ERRATA_751472
  1132. bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
  1133. depends on CPU_V7
  1134. help
  1135. This option enables the workaround for the 751472 Cortex-A9 (prior
  1136. to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
  1137. completion of a following broadcasted operation if the second
  1138. operation is received by a CPU before the ICIALLUIS has completed,
  1139. potentially leading to corrupted entries in the cache or TLB.
  1140. config PL310_ERRATA_753970
  1141. bool "PL310 errata: cache sync operation may be faulty"
  1142. depends on CACHE_PL310
  1143. help
  1144. This option enables the workaround for the 753970 PL310 (r3p0) erratum.
  1145. Under some condition the effect of cache sync operation on
  1146. the store buffer still remains when the operation completes.
  1147. This means that the store buffer is always asked to drain and
  1148. this prevents it from merging any further writes. The workaround
  1149. is to replace the normal offset of cache sync operation (0x730)
  1150. by another offset targeting an unmapped PL310 register 0x740.
  1151. This has the same effect as the cache sync operation: store buffer
  1152. drain and waiting for all buffers empty.
  1153. config ARM_ERRATA_754322
  1154. bool "ARM errata: possible faulty MMU translations following an ASID switch"
  1155. depends on CPU_V7
  1156. help
  1157. This option enables the workaround for the 754322 Cortex-A9 (r2p*,
  1158. r3p*) erratum. A speculative memory access may cause a page table walk
  1159. which starts prior to an ASID switch but completes afterwards. This
  1160. can populate the micro-TLB with a stale entry which may be hit with
  1161. the new ASID. This workaround places two dsb instructions in the mm
  1162. switching code so that no page table walks can cross the ASID switch.
  1163. config ARM_ERRATA_754327
  1164. bool "ARM errata: no automatic Store Buffer drain"
  1165. depends on CPU_V7 && SMP
  1166. help
  1167. This option enables the workaround for the 754327 Cortex-A9 (prior to
  1168. r2p0) erratum. The Store Buffer does not have any automatic draining
  1169. mechanism and therefore a livelock may occur if an external agent
  1170. continuously polls a memory location waiting to observe an update.
  1171. This workaround defines cpu_relax() as smp_mb(), preventing correctly
  1172. written polling loops from denying visibility of updates to memory.
  1173. config ARM_ERRATA_364296
  1174. bool "ARM errata: Possible cache data corruption with hit-under-miss enabled"
  1175. depends on CPU_V6 && !SMP
  1176. help
  1177. This options enables the workaround for the 364296 ARM1136
  1178. r0p2 erratum (possible cache data corruption with
  1179. hit-under-miss enabled). It sets the undocumented bit 31 in
  1180. the auxiliary control register and the FI bit in the control
  1181. register, thus disabling hit-under-miss without putting the
  1182. processor into full low interrupt latency mode. ARM11MPCore
  1183. is not affected.
  1184. config ARM_ERRATA_764369
  1185. bool "ARM errata: Data cache line maintenance operation by MVA may not succeed"
  1186. depends on CPU_V7 && SMP
  1187. help
  1188. This option enables the workaround for erratum 764369
  1189. affecting Cortex-A9 MPCore with two or more processors (all
  1190. current revisions). Under certain timing circumstances, a data
  1191. cache line maintenance operation by MVA targeting an Inner
  1192. Shareable memory region may fail to proceed up to either the
  1193. Point of Coherency or to the Point of Unification of the
  1194. system. This workaround adds a DSB instruction before the
  1195. relevant cache maintenance functions and sets a specific bit
  1196. in the diagnostic control register of the SCU.
  1197. config PL310_ERRATA_769419
  1198. bool "PL310 errata: no automatic Store Buffer drain"
  1199. depends on CACHE_L2X0
  1200. help
  1201. On revisions of the PL310 prior to r3p2, the Store Buffer does
  1202. not automatically drain. This can cause normal, non-cacheable
  1203. writes to be retained when the memory system is idle, leading
  1204. to suboptimal I/O performance for drivers using coherent DMA.
  1205. This option adds a write barrier to the cpu_idle loop so that,
  1206. on systems with an outer cache, the store buffer is drained
  1207. explicitly.
  1208. endmenu
  1209. source "arch/arm/common/Kconfig"
  1210. menu "Bus support"
  1211. config ARM_AMBA
  1212. bool
  1213. config ISA
  1214. bool
  1215. help
  1216. Find out whether you have ISA slots on your motherboard. ISA is the
  1217. name of a bus system, i.e. the way the CPU talks to the other stuff
  1218. inside your box. Other bus systems are PCI, EISA, MicroChannel
  1219. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  1220. newer boards don't support it. If you have ISA, say Y, otherwise N.
  1221. # Select ISA DMA controller support
  1222. config ISA_DMA
  1223. bool
  1224. select ISA_DMA_API
  1225. # Select ISA DMA interface
  1226. config ISA_DMA_API
  1227. bool
  1228. config PCI
  1229. bool "PCI support" if MIGHT_HAVE_PCI
  1230. help
  1231. Find out whether you have a PCI motherboard. PCI is the name of a
  1232. bus system, i.e. the way the CPU talks to the other stuff inside
  1233. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  1234. VESA. If you have PCI, say Y, otherwise N.
  1235. config PCI_DOMAINS
  1236. bool
  1237. depends on PCI
  1238. config PCI_NANOENGINE
  1239. bool "BSE nanoEngine PCI support"
  1240. depends on SA1100_NANOENGINE
  1241. help
  1242. Enable PCI on the BSE nanoEngine board.
  1243. config PCI_SYSCALL
  1244. def_bool PCI
  1245. # Select the host bridge type
  1246. config PCI_HOST_VIA82C505
  1247. bool
  1248. depends on PCI && ARCH_SHARK
  1249. default y
  1250. config PCI_HOST_ITE8152
  1251. bool
  1252. depends on PCI && MACH_ARMCORE
  1253. default y
  1254. select DMABOUNCE
  1255. source "drivers/pci/Kconfig"
  1256. source "drivers/pcmcia/Kconfig"
  1257. endmenu
  1258. menu "Kernel Features"
  1259. config HAVE_SMP
  1260. bool
  1261. help
  1262. This option should be selected by machines which have an SMP-
  1263. capable CPU.
  1264. The only effect of this option is to make the SMP-related
  1265. options available to the user for configuration.
  1266. config SMP
  1267. bool "Symmetric Multi-Processing"
  1268. depends on CPU_V6K || CPU_V7
  1269. depends on GENERIC_CLOCKEVENTS
  1270. depends on HAVE_SMP
  1271. depends on MMU
  1272. select USE_GENERIC_SMP_HELPERS
  1273. select HAVE_ARM_SCU if !ARCH_MSM_SCORPIONMP
  1274. help
  1275. This enables support for systems with more than one CPU. If you have
  1276. a system with only one CPU, like most personal computers, say N. If
  1277. you have a system with more than one CPU, say Y.
  1278. If you say N here, the kernel will run on single and multiprocessor
  1279. machines, but will use only one CPU of a multiprocessor machine. If
  1280. you say Y here, the kernel will run on many, but not all, single
  1281. processor machines. On a single processor machine, the kernel will
  1282. run faster if you say N here.
  1283. See also <file:Documentation/x86/i386/IO-APIC.txt>,
  1284. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  1285. <http://tldp.org/HOWTO/SMP-HOWTO.html>.
  1286. If you don't know what to do here, say N.
  1287. config SMP_ON_UP
  1288. bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
  1289. depends on EXPERIMENTAL
  1290. depends on SMP && !XIP_KERNEL
  1291. default y
  1292. help
  1293. SMP kernels contain instructions which fail on non-SMP processors.
  1294. Enabling this option allows the kernel to modify itself to make
  1295. these instructions safe. Disabling it allows about 1K of space
  1296. savings.
  1297. If you don't know what to do here, say Y.
  1298. config ARM_CPU_TOPOLOGY
  1299. bool "Support cpu topology definition"
  1300. depends on SMP && CPU_V7
  1301. default y
  1302. help
  1303. Support ARM cpu topology definition. The MPIDR register defines
  1304. affinity between processors which is then used to describe the cpu
  1305. topology of an ARM System.
  1306. config SCHED_MC
  1307. bool "Multi-core scheduler support"
  1308. depends on ARM_CPU_TOPOLOGY
  1309. help
  1310. Multi-core scheduler support improves the CPU scheduler's decision
  1311. making when dealing with multi-core CPU chips at a cost of slightly
  1312. increased overhead in some places. If unsure say N here.
  1313. config SCHED_SMT
  1314. bool "SMT scheduler support"
  1315. depends on ARM_CPU_TOPOLOGY
  1316. help
  1317. Improves the CPU scheduler's decision making when dealing with
  1318. MultiThreading at a cost of slightly increased overhead in some
  1319. places. If unsure say N here.
  1320. config HAVE_ARM_SCU
  1321. bool
  1322. help
  1323. This option enables support for the ARM system coherency unit
  1324. config ARM_ARCH_TIMER
  1325. bool "Architected timer support"
  1326. depends on CPU_V7
  1327. help
  1328. This option enables support for the ARM architected timer
  1329. config HAVE_ARM_TWD
  1330. bool
  1331. depends on SMP
  1332. help
  1333. This options enables support for the ARM timer and watchdog unit
  1334. choice
  1335. prompt "Memory split"
  1336. default VMSPLIT_3G
  1337. help
  1338. Select the desired split between kernel and user memory.
  1339. If you are not absolutely sure what you are doing, leave this
  1340. option alone!
  1341. config VMSPLIT_3G
  1342. bool "3G/1G user/kernel split"
  1343. config VMSPLIT_2G
  1344. bool "2G/2G user/kernel split"
  1345. config VMSPLIT_1G
  1346. bool "1G/3G user/kernel split"
  1347. endchoice
  1348. config PAGE_OFFSET
  1349. hex
  1350. default 0x40000000 if VMSPLIT_1G
  1351. default 0x80000000 if VMSPLIT_2G
  1352. default 0xC0000000
  1353. config NR_CPUS
  1354. int "Maximum number of CPUs (2-32)"
  1355. range 2 32
  1356. depends on SMP
  1357. default "4"
  1358. config HOTPLUG_CPU
  1359. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  1360. depends on SMP && HOTPLUG && EXPERIMENTAL
  1361. help
  1362. Say Y here to experiment with turning CPUs off and on. CPUs
  1363. can be controlled through /sys/devices/system/cpu.
  1364. config LOCAL_TIMERS
  1365. bool "Use local timer interrupts"
  1366. depends on SMP
  1367. default y
  1368. select HAVE_ARM_TWD if (!ARCH_MSM_SCORPIONMP && !EXYNOS4_MCT)
  1369. help
  1370. Enable support for local timers on SMP platforms, rather then the
  1371. legacy IPI broadcast method. Local timers allows the system
  1372. accounting to be spread across the timer interval, preventing a
  1373. "thundering herd" at every timer tick.
  1374. config ARCH_NR_GPIO
  1375. int
  1376. default 1024 if ARCH_SHMOBILE || ARCH_TEGRA
  1377. default 355 if ARCH_U8500
  1378. default 264 if MACH_H4700
  1379. default 512 if SOC_OMAP5
  1380. default 288 if ARCH_VT8500
  1381. default 0
  1382. help
  1383. Maximum number of GPIOs in the system.
  1384. If unsure, leave the default value.
  1385. source kernel/Kconfig.preempt
  1386. config HZ
  1387. int
  1388. default 200 if ARCH_EBSA110 || ARCH_S3C24XX || ARCH_S5P64X0 || \
  1389. ARCH_S5PV210 || ARCH_EXYNOS4
  1390. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  1391. default AT91_TIMER_HZ if ARCH_AT91
  1392. default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
  1393. default 100
  1394. config THUMB2_KERNEL
  1395. bool "Compile the kernel in Thumb-2 mode (EXPERIMENTAL)"
  1396. depends on CPU_V7 && !CPU_V6 && !CPU_V6K && EXPERIMENTAL
  1397. select AEABI
  1398. select ARM_ASM_UNIFIED
  1399. select ARM_UNWIND
  1400. help
  1401. By enabling this option, the kernel will be compiled in
  1402. Thumb-2 mode. A compiler/assembler that understand the unified
  1403. ARM-Thumb syntax is needed.
  1404. If unsure, say N.
  1405. config THUMB2_AVOID_R_ARM_THM_JUMP11
  1406. bool "Work around buggy Thumb-2 short branch relocations in gas"
  1407. depends on THUMB2_KERNEL && MODULES
  1408. default y
  1409. help
  1410. Various binutils versions can resolve Thumb-2 branches to
  1411. locally-defined, preemptible global symbols as short-range "b.n"
  1412. branch instructions.
  1413. This is a problem, because there's no guarantee the final
  1414. destination of the symbol, or any candidate locations for a
  1415. trampoline, are within range of the branch. For this reason, the
  1416. kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
  1417. relocation in modules at all, and it makes little sense to add
  1418. support.
  1419. The symptom is that the kernel fails with an "unsupported
  1420. relocation" error when loading some modules.
  1421. Until fixed tools are available, passing
  1422. -fno-optimize-sibling-calls to gcc should prevent gcc generating
  1423. code which hits this problem, at the cost of a bit of extra runtime
  1424. stack usage in some cases.
  1425. The problem is described in more detail at:
  1426. https://bugs.launchpad.net/binutils-linaro/+bug/725126
  1427. Only Thumb-2 kernels are affected.
  1428. Unless you are sure your tools don't have this problem, say Y.
  1429. config ARM_ASM_UNIFIED
  1430. bool
  1431. config AEABI
  1432. bool "Use the ARM EABI to compile the kernel"
  1433. help
  1434. This option allows for the kernel to be compiled using the latest
  1435. ARM ABI (aka EABI). This is only useful if you are using a user
  1436. space environment that is also compiled with EABI.
  1437. Since there are major incompatibilities between the legacy ABI and
  1438. EABI, especially with regard to structure member alignment, this
  1439. option also changes the kernel syscall calling convention to
  1440. disambiguate both ABIs and allow for backward compatibility support
  1441. (selected with CONFIG_OABI_COMPAT).
  1442. To use this you need GCC version 4.0.0 or later.
  1443. config OABI_COMPAT
  1444. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  1445. depends on AEABI && EXPERIMENTAL && !THUMB2_KERNEL
  1446. default y
  1447. help
  1448. This option preserves the old syscall interface along with the
  1449. new (ARM EABI) one. It also provides a compatibility layer to
  1450. intercept syscalls that have structure arguments which layout
  1451. in memory differs between the legacy ABI and the new ARM EABI
  1452. (only for non "thumb" binaries). This option adds a tiny
  1453. overhead to all syscalls and produces a slightly larger kernel.
  1454. If you know you'll be using only pure EABI user space then you
  1455. can say N here. If this option is not selected and you attempt
  1456. to execute a legacy ABI binary then the result will be
  1457. UNPREDICTABLE (in fact it can be predicted that it won't work
  1458. at all). If in doubt say Y.
  1459. config ARCH_HAS_HOLES_MEMORYMODEL
  1460. bool
  1461. config ARCH_SPARSEMEM_ENABLE
  1462. bool
  1463. config ARCH_SPARSEMEM_DEFAULT
  1464. def_bool ARCH_SPARSEMEM_ENABLE
  1465. config ARCH_SELECT_MEMORY_MODEL
  1466. def_bool ARCH_SPARSEMEM_ENABLE
  1467. config HAVE_ARCH_PFN_VALID
  1468. def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
  1469. config HIGHMEM
  1470. bool "High Memory Support"
  1471. depends on MMU
  1472. help
  1473. The address space of ARM processors is only 4 Gigabytes large
  1474. and it has to accommodate user address space, kernel address
  1475. space as well as some memory mapped IO. That means that, if you
  1476. have a large amount of physical memory and/or IO, not all of the
  1477. memory can be "permanently mapped" by the kernel. The physical
  1478. memory that is not permanently mapped is called "high memory".
  1479. Depending on the selected kernel/user memory split, minimum
  1480. vmalloc space and actual amount of RAM, you may not need this
  1481. option which should result in a slightly faster kernel.
  1482. If unsure, say n.
  1483. config HIGHPTE
  1484. bool "Allocate 2nd-level pagetables from highmem"
  1485. depends on HIGHMEM
  1486. config HW_PERF_EVENTS
  1487. bool "Enable hardware performance counter support for perf events"
  1488. depends on PERF_EVENTS
  1489. default y
  1490. help
  1491. Enable hardware performance counter support for perf events. If
  1492. disabled, perf events will use software events only.
  1493. source "mm/Kconfig"
  1494. config FORCE_MAX_ZONEORDER
  1495. int "Maximum zone order" if ARCH_SHMOBILE
  1496. range 11 64 if ARCH_SHMOBILE
  1497. default "9" if SA1111
  1498. default "11"
  1499. help
  1500. The kernel memory allocator divides physically contiguous memory
  1501. blocks into "zones", where each zone is a power of two number of
  1502. pages. This option selects the largest power of two that the kernel
  1503. keeps in the memory allocator. If you need to allocate very large
  1504. blocks of physically contiguous memory, then you may need to
  1505. increase this value.
  1506. This config option is actually maximum order plus one. For example,
  1507. a value of 11 means that the largest free memory block is 2^10 pages.
  1508. config ALIGNMENT_TRAP
  1509. bool
  1510. depends on CPU_CP15_MMU
  1511. default y if !ARCH_EBSA110
  1512. select HAVE_PROC_CPU if PROC_FS
  1513. help
  1514. ARM processors cannot fetch/store information which is not
  1515. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  1516. address divisible by 4. On 32-bit ARM processors, these non-aligned
  1517. fetch/store instructions will be emulated in software if you say
  1518. here, which has a severe performance impact. This is necessary for
  1519. correct operation of some network protocols. With an IP-only
  1520. configuration it is safe to say N, otherwise say Y.
  1521. config UACCESS_WITH_MEMCPY
  1522. bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
  1523. depends on MMU && EXPERIMENTAL
  1524. default y if CPU_FEROCEON
  1525. help
  1526. Implement faster copy_to_user and clear_user methods for CPU
  1527. cores where a 8-word STM instruction give significantly higher
  1528. memory write throughput than a sequence of individual 32bit stores.
  1529. A possible side effect is a slight increase in scheduling latency
  1530. between threads sharing the same address space if they invoke
  1531. such copy operations with large buffers.
  1532. However, if the CPU data cache is using a write-allocate mode,
  1533. this option is unlikely to provide any performance gain.
  1534. config SECCOMP
  1535. bool
  1536. prompt "Enable seccomp to safely compute untrusted bytecode"
  1537. ---help---
  1538. This kernel feature is useful for number crunching applications
  1539. that may need to compute untrusted bytecode during their
  1540. execution. By using pipes or other transports made available to
  1541. the process as file descriptors supporting the read/write
  1542. syscalls, it's possible to isolate those applications in
  1543. their own address space using seccomp. Once seccomp is
  1544. enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
  1545. and the task is only allowed to execute a few safe syscalls
  1546. defined by each seccomp mode.
  1547. config CC_STACKPROTECTOR
  1548. bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
  1549. depends on EXPERIMENTAL
  1550. help
  1551. This option turns on the -fstack-protector GCC feature. This
  1552. feature puts, at the beginning of functions, a canary value on
  1553. the stack just before the return address, and validates
  1554. the value just before actually returning. Stack based buffer
  1555. overflows (that need to overwrite this return address) now also
  1556. overwrite the canary, which gets detected and the attack is then
  1557. neutralized via a kernel panic.
  1558. This feature requires gcc version 4.2 or above.
  1559. config DEPRECATED_PARAM_STRUCT
  1560. bool "Provide old way to pass kernel parameters"
  1561. help
  1562. This was deprecated in 2001 and announced to live on for 5 years.
  1563. Some old boot loaders still use this way.
  1564. config XEN_DOM0
  1565. def_bool y
  1566. depends on XEN
  1567. config XEN
  1568. bool "Xen guest support on ARM (EXPERIMENTAL)"
  1569. depends on EXPERIMENTAL && ARM && OF
  1570. help
  1571. Say Y if you want to run Linux in a Virtual Machine on Xen on ARM.
  1572. endmenu
  1573. menu "Boot options"
  1574. config USE_OF
  1575. bool "Flattened Device Tree support"
  1576. select OF
  1577. select OF_EARLY_FLATTREE
  1578. select IRQ_DOMAIN
  1579. help
  1580. Include support for flattened device tree machine descriptions.
  1581. # Compressed boot loader in ROM. Yes, we really want to ask about
  1582. # TEXT and BSS so we preserve their values in the config files.
  1583. config ZBOOT_ROM_TEXT
  1584. hex "Compressed ROM boot loader base address"
  1585. default "0"
  1586. help
  1587. The physical address at which the ROM-able zImage is to be
  1588. placed in the target. Platforms which normally make use of
  1589. ROM-able zImage formats normally set this to a suitable
  1590. value in their defconfig file.
  1591. If ZBOOT_ROM is not enabled, this has no effect.
  1592. config ZBOOT_ROM_BSS
  1593. hex "Compressed ROM boot loader BSS address"
  1594. default "0"
  1595. help
  1596. The base address of an area of read/write memory in the target
  1597. for the ROM-able zImage which must be available while the
  1598. decompressor is running. It must be large enough to hold the
  1599. entire decompressed kernel plus an additional 128 KiB.
  1600. Platforms which normally make use of ROM-able zImage formats
  1601. normally set this to a suitable value in their defconfig file.
  1602. If ZBOOT_ROM is not enabled, this has no effect.
  1603. config ZBOOT_ROM
  1604. bool "Compressed boot loader in ROM/flash"
  1605. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  1606. help
  1607. Say Y here if you intend to execute your compressed kernel image
  1608. (zImage) directly from ROM or flash. If unsure, say N.
  1609. choice
  1610. prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)"
  1611. depends on ZBOOT_ROM && ARCH_SH7372 && EXPERIMENTAL
  1612. default ZBOOT_ROM_NONE
  1613. help
  1614. Include experimental SD/MMC loading code in the ROM-able zImage.
  1615. With this enabled it is possible to write the ROM-able zImage
  1616. kernel image to an MMC or SD card and boot the kernel straight
  1617. from the reset vector. At reset the processor Mask ROM will load
  1618. the first part of the ROM-able zImage which in turn loads the
  1619. rest the kernel image to RAM.
  1620. config ZBOOT_ROM_NONE
  1621. bool "No SD/MMC loader in zImage (EXPERIMENTAL)"
  1622. help
  1623. Do not load image from SD or MMC
  1624. config ZBOOT_ROM_MMCIF
  1625. bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
  1626. help
  1627. Load image from MMCIF hardware block.
  1628. config ZBOOT_ROM_SH_MOBILE_SDHI
  1629. bool "Include SuperH Mobile SDHI loader in zImage (EXPERIMENTAL)"
  1630. help
  1631. Load image from SDHI hardware block
  1632. endchoice
  1633. config ARM_APPENDED_DTB
  1634. bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
  1635. depends on OF && !ZBOOT_ROM && EXPERIMENTAL
  1636. help
  1637. With this option, the boot code will look for a device tree binary
  1638. (DTB) appended to zImage
  1639. (e.g. cat zImage <filename>.dtb > zImage_w_dtb).
  1640. This is meant as a backward compatibility convenience for those
  1641. systems with a bootloader that can't be upgraded to accommodate
  1642. the documented boot protocol using a device tree.
  1643. Beware that there is very little in terms of protection against
  1644. this option being confused by leftover garbage in memory that might
  1645. look like a DTB header after a reboot if no actual DTB is appended
  1646. to zImage. Do not leave this option active in a production kernel
  1647. if you don't intend to always append a DTB. Proper passing of the
  1648. location into r2 of a bootloader provided DTB is always preferable
  1649. to this option.
  1650. config ARM_ATAG_DTB_COMPAT
  1651. bool "Supplement the appended DTB with traditional ATAG information"
  1652. depends on ARM_APPENDED_DTB
  1653. help
  1654. Some old bootloaders can't be updated to a DTB capable one, yet
  1655. they provide ATAGs with memory configuration, the ramdisk address,
  1656. the kernel cmdline string, etc. Such information is dynamically
  1657. provided by the bootloader and can't always be stored in a static
  1658. DTB. To allow a device tree enabled kernel to be used with such
  1659. bootloaders, this option allows zImage to extract the information
  1660. from the ATAG list and store it at run time into the appended DTB.
  1661. choice
  1662. prompt "Kernel command line type" if ARM_ATAG_DTB_COMPAT
  1663. default ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
  1664. config ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
  1665. bool "Use bootloader kernel arguments if available"
  1666. help
  1667. Uses the command-line options passed by the boot loader instead of
  1668. the device tree bootargs property. If the boot loader doesn't provide
  1669. any, the device tree bootargs property will be used.
  1670. config ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEND
  1671. bool "Extend with bootloader kernel arguments"
  1672. help
  1673. The command-line arguments provided by the boot loader will be
  1674. appended to the the device tree bootargs property.
  1675. endchoice
  1676. config CMDLINE
  1677. string "Default kernel command string"
  1678. default ""
  1679. help
  1680. On some architectures (EBSA110 and CATS), there is currently no way
  1681. for the boot loader to pass arguments to the kernel. For these
  1682. architectures, you should supply some command-line options at build
  1683. time by entering them here. As a minimum, you should specify the
  1684. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  1685. choice
  1686. prompt "Kernel command line type" if CMDLINE != ""
  1687. default CMDLINE_FROM_BOOTLOADER
  1688. config CMDLINE_FROM_BOOTLOADER
  1689. bool "Use bootloader kernel arguments if available"
  1690. help
  1691. Uses the command-line options passed by the boot loader. If
  1692. the boot loader doesn't provide any, the default kernel command
  1693. string provided in CMDLINE will be used.
  1694. config CMDLINE_EXTEND
  1695. bool "Extend bootloader kernel arguments"
  1696. help
  1697. The command-line arguments provided by the boot loader will be
  1698. appended to the default kernel command string.
  1699. config CMDLINE_FORCE
  1700. bool "Always use the default kernel command string"
  1701. help
  1702. Always use the default kernel command string, even if the boot
  1703. loader passes other arguments to the kernel.
  1704. This is useful if you cannot or don't want to change the
  1705. command-line options your boot loader passes to the kernel.
  1706. endchoice
  1707. config XIP_KERNEL
  1708. bool "Kernel Execute-In-Place from ROM"
  1709. depends on !ZBOOT_ROM && !ARM_LPAE && !ARCH_MULTIPLATFORM
  1710. help
  1711. Execute-In-Place allows the kernel to run from non-volatile storage
  1712. directly addressable by the CPU, such as NOR flash. This saves RAM
  1713. space since the text section of the kernel is not loaded from flash
  1714. to RAM. Read-write sections, such as the data section and stack,
  1715. are still copied to RAM. The XIP kernel is not compressed since
  1716. it has to run directly from flash, so it will take more space to
  1717. store it. The flash address used to link the kernel object files,
  1718. and for storing it, is configuration dependent. Therefore, if you
  1719. say Y here, you must know the proper physical address where to
  1720. store the kernel image depending on your own flash memory usage.
  1721. Also note that the make target becomes "make xipImage" rather than
  1722. "make zImage" or "make Image". The final kernel binary to put in
  1723. ROM memory will be arch/arm/boot/xipImage.
  1724. If unsure, say N.
  1725. config XIP_PHYS_ADDR
  1726. hex "XIP Kernel Physical Location"
  1727. depends on XIP_KERNEL
  1728. default "0x00080000"
  1729. help
  1730. This is the physical address in your flash memory the kernel will
  1731. be linked for and stored to. This address is dependent on your
  1732. own flash usage.
  1733. config KEXEC
  1734. bool "Kexec system call (EXPERIMENTAL)"
  1735. depends on EXPERIMENTAL && (!SMP || HOTPLUG_CPU)
  1736. help
  1737. kexec is a system call that implements the ability to shutdown your
  1738. current kernel, and to start another kernel. It is like a reboot
  1739. but it is independent of the system firmware. And like a reboot
  1740. you can start any kernel with it, not just Linux.
  1741. It is an ongoing process to be certain the hardware in a machine
  1742. is properly shutdown, so do not be surprised if this code does not
  1743. initially work for you. It may help to enable device hotplugging
  1744. support.
  1745. config ATAGS_PROC
  1746. bool "Export atags in procfs"
  1747. depends on KEXEC
  1748. default y
  1749. help
  1750. Should the atags used to boot the kernel be exported in an "atags"
  1751. file in procfs. Useful with kexec.
  1752. config CRASH_DUMP
  1753. bool "Build kdump crash kernel (EXPERIMENTAL)"
  1754. depends on EXPERIMENTAL
  1755. help
  1756. Generate crash dump after being started by kexec. This should
  1757. be normally only set in special crash dump kernels which are
  1758. loaded in the main kernel with kexec-tools into a specially
  1759. reserved region and then later executed after a crash by
  1760. kdump/kexec. The crash dump kernel must be compiled to a
  1761. memory address not used by the main kernel
  1762. For more details see Documentation/kdump/kdump.txt
  1763. config AUTO_ZRELADDR
  1764. bool "Auto calculation of the decompressed kernel image address"
  1765. depends on !ZBOOT_ROM && !ARCH_U300
  1766. help
  1767. ZRELADDR is the physical address where the decompressed kernel
  1768. image will be placed. If AUTO_ZRELADDR is selected, the address
  1769. will be determined at run-time by masking the current IP with
  1770. 0xf8000000. This assumes the zImage being placed in the first 128MB
  1771. from start of memory.
  1772. endmenu
  1773. menu "CPU Power Management"
  1774. if ARCH_HAS_CPUFREQ
  1775. source "drivers/cpufreq/Kconfig"
  1776. config CPU_FREQ_IMX
  1777. tristate "CPUfreq driver for i.MX CPUs"
  1778. depends on ARCH_MXC && CPU_FREQ
  1779. select CPU_FREQ_TABLE
  1780. help
  1781. This enables the CPUfreq driver for i.MX CPUs.
  1782. config CPU_FREQ_SA1100
  1783. bool
  1784. config CPU_FREQ_SA1110
  1785. bool
  1786. config CPU_FREQ_INTEGRATOR
  1787. tristate "CPUfreq driver for ARM Integrator CPUs"
  1788. depends on ARCH_INTEGRATOR && CPU_FREQ
  1789. default y
  1790. help
  1791. This enables the CPUfreq driver for ARM Integrator CPUs.
  1792. For details, take a look at <file:Documentation/cpu-freq>.
  1793. If in doubt, say Y.
  1794. config CPU_FREQ_PXA
  1795. bool
  1796. depends on CPU_FREQ && ARCH_PXA && PXA25x
  1797. default y
  1798. select CPU_FREQ_TABLE
  1799. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  1800. config CPU_FREQ_S3C
  1801. bool
  1802. help
  1803. Internal configuration node for common cpufreq on Samsung SoC
  1804. config CPU_FREQ_S3C24XX
  1805. bool "CPUfreq driver for Samsung S3C24XX series CPUs (EXPERIMENTAL)"
  1806. depends on ARCH_S3C24XX && CPU_FREQ && EXPERIMENTAL
  1807. select CPU_FREQ_S3C
  1808. help
  1809. This enables the CPUfreq driver for the Samsung S3C24XX family
  1810. of CPUs.
  1811. For details, take a look at <file:Documentation/cpu-freq>.
  1812. If in doubt, say N.
  1813. config CPU_FREQ_S3C24XX_PLL
  1814. bool "Support CPUfreq changing of PLL frequency (EXPERIMENTAL)"
  1815. depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
  1816. help
  1817. Compile in support for changing the PLL frequency from the
  1818. S3C24XX series CPUfreq driver. The PLL takes time to settle
  1819. after a frequency change, so by default it is not enabled.
  1820. This also means that the PLL tables for the selected CPU(s) will
  1821. be built which may increase the size of the kernel image.
  1822. config CPU_FREQ_S3C24XX_DEBUG
  1823. bool "Debug CPUfreq Samsung driver core"
  1824. depends on CPU_FREQ_S3C24XX
  1825. help
  1826. Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
  1827. config CPU_FREQ_S3C24XX_IODEBUG
  1828. bool "Debug CPUfreq Samsung driver IO timing"
  1829. depends on CPU_FREQ_S3C24XX
  1830. help
  1831. Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
  1832. config CPU_FREQ_S3C24XX_DEBUGFS
  1833. bool "Export debugfs for CPUFreq"
  1834. depends on CPU_FREQ_S3C24XX && DEBUG_FS
  1835. help
  1836. Export status information via debugfs.
  1837. endif
  1838. source "drivers/cpuidle/Kconfig"
  1839. endmenu
  1840. menu "Floating point emulation"
  1841. comment "At least one emulation must be selected"
  1842. config FPE_NWFPE
  1843. bool "NWFPE math emulation"
  1844. depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
  1845. ---help---
  1846. Say Y to include the NWFPE floating point emulator in the kernel.
  1847. This is necessary to run most binaries. Linux does not currently
  1848. support floating point hardware so you need to say Y here even if
  1849. your machine has an FPA or floating point co-processor podule.
  1850. You may say N here if you are going to load the Acorn FPEmulator
  1851. early in the bootup.
  1852. config FPE_NWFPE_XP
  1853. bool "Support extended precision"
  1854. depends on FPE_NWFPE
  1855. help
  1856. Say Y to include 80-bit support in the kernel floating-point
  1857. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  1858. Note that gcc does not generate 80-bit operations by default,
  1859. so in most cases this option only enlarges the size of the
  1860. floating point emulator without any good reason.
  1861. You almost surely want to say N here.
  1862. config FPE_FASTFPE
  1863. bool "FastFPE math emulation (EXPERIMENTAL)"
  1864. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  1865. ---help---
  1866. Say Y here to include the FAST floating point emulator in the kernel.
  1867. This is an experimental much faster emulator which now also has full
  1868. precision for the mantissa. It does not support any exceptions.
  1869. It is very simple, and approximately 3-6 times faster than NWFPE.
  1870. It should be sufficient for most programs. It may be not suitable
  1871. for scientific calculations, but you have to check this for yourself.
  1872. If you do not feel you need a faster FP emulation you should better
  1873. choose NWFPE.
  1874. config VFP
  1875. bool "VFP-format floating point maths"
  1876. depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  1877. help
  1878. Say Y to include VFP support code in the kernel. This is needed
  1879. if your hardware includes a VFP unit.
  1880. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  1881. release notes and additional status information.
  1882. Say N if your target does not have VFP hardware.
  1883. config VFPv3
  1884. bool
  1885. depends on VFP
  1886. default y if CPU_V7
  1887. config NEON
  1888. bool "Advanced SIMD (NEON) Extension support"
  1889. depends on VFPv3 && CPU_V7
  1890. help
  1891. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  1892. Extension.
  1893. endmenu
  1894. menu "Userspace binary formats"
  1895. source "fs/Kconfig.binfmt"
  1896. config ARTHUR
  1897. tristate "RISC OS personality"
  1898. depends on !AEABI
  1899. help
  1900. Say Y here to include the kernel code necessary if you want to run
  1901. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  1902. experimental; if this sounds frightening, say N and sleep in peace.
  1903. You can also say M here to compile this support as a module (which
  1904. will be called arthur).
  1905. endmenu
  1906. menu "Power management options"
  1907. source "kernel/power/Kconfig"
  1908. config ARCH_SUSPEND_POSSIBLE
  1909. depends on !ARCH_S5PC100
  1910. depends on CPU_ARM920T || CPU_ARM926T || CPU_SA1100 || \
  1911. CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE || CPU_MOHAWK
  1912. def_bool y
  1913. config ARM_CPU_SUSPEND
  1914. def_bool PM_SLEEP
  1915. endmenu
  1916. source "net/Kconfig"
  1917. source "drivers/Kconfig"
  1918. source "fs/Kconfig"
  1919. source "arch/arm/Kconfig.debug"
  1920. source "security/Kconfig"
  1921. source "crypto/Kconfig"
  1922. source "lib/Kconfig"