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_IO_H
  167. bool
  168. help
  169. Select this when mach/io.h is required to provide special
  170. definitions for this platform. The need for mach/io.h should
  171. be avoided when possible.
  172. config NEED_MACH_MEMORY_H
  173. bool
  174. help
  175. Select this when mach/memory.h is required to provide special
  176. definitions for this platform. The need for mach/memory.h should
  177. be avoided when possible.
  178. config PHYS_OFFSET
  179. hex "Physical address of main memory" if MMU
  180. depends on !ARM_PATCH_PHYS_VIRT && !NEED_MACH_MEMORY_H
  181. default DRAM_BASE if !MMU
  182. help
  183. Please provide the physical address corresponding to the
  184. location of main memory in your system.
  185. config GENERIC_BUG
  186. def_bool y
  187. depends on BUG
  188. source "init/Kconfig"
  189. source "kernel/Kconfig.freezer"
  190. menu "System Type"
  191. config MMU
  192. bool "MMU-based Paged Memory Management Support"
  193. default y
  194. help
  195. Select if you want MMU-based virtualised addressing space
  196. support by paged memory management. If unsure, say 'Y'.
  197. #
  198. # The "ARM system type" choice list is ordered alphabetically by option
  199. # text. Please add new entries in the option alphabetic order.
  200. #
  201. choice
  202. prompt "ARM system type"
  203. default ARCH_VERSATILE
  204. config ARCH_SOCFPGA
  205. bool "Altera SOCFPGA family"
  206. select ARCH_WANT_OPTIONAL_GPIOLIB
  207. select ARM_AMBA
  208. select ARM_GIC
  209. select CACHE_L2X0
  210. select CLKDEV_LOOKUP
  211. select COMMON_CLK
  212. select CPU_V7
  213. select DW_APB_TIMER
  214. select DW_APB_TIMER_OF
  215. select GENERIC_CLOCKEVENTS
  216. select GPIO_PL061 if GPIOLIB
  217. select HAVE_ARM_SCU
  218. select SPARSE_IRQ
  219. select USE_OF
  220. help
  221. This enables support for Altera SOCFPGA Cyclone V platform
  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_VEXPRESS
  270. bool "ARM Ltd. Versatile Express family"
  271. select ARCH_WANT_OPTIONAL_GPIOLIB
  272. select ARM_AMBA
  273. select ARM_TIMER_SP804
  274. select CLKDEV_LOOKUP
  275. select COMMON_CLK
  276. select GENERIC_CLOCKEVENTS
  277. select HAVE_CLK
  278. select HAVE_PATA_PLATFORM
  279. select ICST
  280. select NO_IOPORT
  281. select PLAT_VERSATILE
  282. select PLAT_VERSATILE_CLCD
  283. select REGULATOR_FIXED_VOLTAGE if REGULATOR
  284. help
  285. This enables support for the ARM Ltd Versatile Express boards.
  286. config ARCH_AT91
  287. bool "Atmel AT91"
  288. select ARCH_REQUIRE_GPIOLIB
  289. select HAVE_CLK
  290. select CLKDEV_LOOKUP
  291. select IRQ_DOMAIN
  292. select NEED_MACH_IO_H if PCCARD
  293. help
  294. This enables support for systems based on Atmel
  295. AT91RM9200 and AT91SAM9* processors.
  296. config ARCH_BCM2835
  297. bool "Broadcom BCM2835 family"
  298. select ARCH_WANT_OPTIONAL_GPIOLIB
  299. select ARM_AMBA
  300. select ARM_ERRATA_411920
  301. select ARM_TIMER_SP804
  302. select CLKDEV_LOOKUP
  303. select COMMON_CLK
  304. select CPU_V6
  305. select GENERIC_CLOCKEVENTS
  306. select MULTI_IRQ_HANDLER
  307. select SPARSE_IRQ
  308. select USE_OF
  309. help
  310. This enables support for the Broadcom BCM2835 SoC. This SoC is
  311. use in the Raspberry Pi, and Roku 2 devices.
  312. config ARCH_HIGHBANK
  313. bool "Calxeda Highbank-based"
  314. select ARCH_WANT_OPTIONAL_GPIOLIB
  315. select ARM_AMBA
  316. select ARM_GIC
  317. select ARM_TIMER_SP804
  318. select CACHE_L2X0
  319. select CLKDEV_LOOKUP
  320. select COMMON_CLK
  321. select CPU_V7
  322. select GENERIC_CLOCKEVENTS
  323. select HAVE_ARM_SCU
  324. select HAVE_SMP
  325. select SPARSE_IRQ
  326. select USE_OF
  327. help
  328. Support for the Calxeda Highbank SoC based boards.
  329. config ARCH_CLPS711X
  330. bool "Cirrus Logic CLPS711x/EP721x/EP731x-based"
  331. select CPU_ARM720T
  332. select ARCH_USES_GETTIMEOFFSET
  333. select COMMON_CLK
  334. select CLKDEV_LOOKUP
  335. select NEED_MACH_MEMORY_H
  336. help
  337. Support for Cirrus Logic 711x/721x/731x based boards.
  338. config ARCH_CNS3XXX
  339. bool "Cavium Networks CNS3XXX family"
  340. select CPU_V6K
  341. select GENERIC_CLOCKEVENTS
  342. select ARM_GIC
  343. select MIGHT_HAVE_CACHE_L2X0
  344. select MIGHT_HAVE_PCI
  345. select PCI_DOMAINS if PCI
  346. help
  347. Support for Cavium Networks CNS3XXX platform.
  348. config ARCH_GEMINI
  349. bool "Cortina Systems Gemini"
  350. select CPU_FA526
  351. select ARCH_REQUIRE_GPIOLIB
  352. select ARCH_USES_GETTIMEOFFSET
  353. help
  354. Support for the Cortina Systems Gemini family SoCs
  355. config ARCH_SIRF
  356. bool "CSR SiRF"
  357. select NO_IOPORT
  358. select ARCH_REQUIRE_GPIOLIB
  359. select GENERIC_CLOCKEVENTS
  360. select COMMON_CLK
  361. select GENERIC_IRQ_CHIP
  362. select MIGHT_HAVE_CACHE_L2X0
  363. select PINCTRL
  364. select PINCTRL_SIRF
  365. select USE_OF
  366. help
  367. Support for CSR SiRFprimaII/Marco/Polo platforms
  368. config ARCH_EBSA110
  369. bool "EBSA-110"
  370. select CPU_SA110
  371. select ISA
  372. select NO_IOPORT
  373. select ARCH_USES_GETTIMEOFFSET
  374. select NEED_MACH_IO_H
  375. select NEED_MACH_MEMORY_H
  376. help
  377. This is an evaluation board for the StrongARM processor available
  378. from Digital. It has limited hardware on-board, including an
  379. Ethernet interface, two PCMCIA sockets, two serial ports and a
  380. parallel port.
  381. config ARCH_EP93XX
  382. bool "EP93xx-based"
  383. select CPU_ARM920T
  384. select ARM_AMBA
  385. select ARM_VIC
  386. select CLKDEV_LOOKUP
  387. select ARCH_REQUIRE_GPIOLIB
  388. select ARCH_HAS_HOLES_MEMORYMODEL
  389. select ARCH_USES_GETTIMEOFFSET
  390. select NEED_MACH_MEMORY_H
  391. help
  392. This enables support for the Cirrus EP93xx series of CPUs.
  393. config ARCH_FOOTBRIDGE
  394. bool "FootBridge"
  395. select CPU_SA110
  396. select FOOTBRIDGE
  397. select GENERIC_CLOCKEVENTS
  398. select HAVE_IDE
  399. select NEED_MACH_IO_H if !MMU
  400. select NEED_MACH_MEMORY_H
  401. help
  402. Support for systems based on the DC21285 companion chip
  403. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  404. config ARCH_MXC
  405. bool "Freescale MXC/iMX-based"
  406. select GENERIC_CLOCKEVENTS
  407. select ARCH_REQUIRE_GPIOLIB
  408. select CLKDEV_LOOKUP
  409. select CLKSRC_MMIO
  410. select GENERIC_IRQ_CHIP
  411. select MULTI_IRQ_HANDLER
  412. select SPARSE_IRQ
  413. select USE_OF
  414. help
  415. Support for Freescale MXC/iMX-based family of processors
  416. config ARCH_MXS
  417. bool "Freescale MXS-based"
  418. select GENERIC_CLOCKEVENTS
  419. select ARCH_REQUIRE_GPIOLIB
  420. select CLKDEV_LOOKUP
  421. select CLKSRC_MMIO
  422. select COMMON_CLK
  423. select HAVE_CLK_PREPARE
  424. select MULTI_IRQ_HANDLER
  425. select PINCTRL
  426. select SPARSE_IRQ
  427. select USE_OF
  428. help
  429. Support for Freescale MXS-based family of processors
  430. config ARCH_NETX
  431. bool "Hilscher NetX based"
  432. select CLKSRC_MMIO
  433. select CPU_ARM926T
  434. select ARM_VIC
  435. select GENERIC_CLOCKEVENTS
  436. help
  437. This enables support for systems based on the Hilscher NetX Soc
  438. config ARCH_H720X
  439. bool "Hynix HMS720x-based"
  440. select CPU_ARM720T
  441. select ISA_DMA_API
  442. select ARCH_USES_GETTIMEOFFSET
  443. help
  444. This enables support for systems based on the Hynix HMS720x
  445. config ARCH_IOP13XX
  446. bool "IOP13xx-based"
  447. depends on MMU
  448. select CPU_XSC3
  449. select PLAT_IOP
  450. select PCI
  451. select ARCH_SUPPORTS_MSI
  452. select VMSPLIT_1G
  453. select NEED_MACH_MEMORY_H
  454. select NEED_RET_TO_USER
  455. help
  456. Support for Intel's IOP13XX (XScale) family of processors.
  457. config ARCH_IOP32X
  458. bool "IOP32x-based"
  459. depends on MMU
  460. select CPU_XSCALE
  461. select NEED_RET_TO_USER
  462. select PLAT_IOP
  463. select PCI
  464. select ARCH_REQUIRE_GPIOLIB
  465. help
  466. Support for Intel's 80219 and IOP32X (XScale) family of
  467. processors.
  468. config ARCH_IOP33X
  469. bool "IOP33x-based"
  470. depends on MMU
  471. select CPU_XSCALE
  472. select NEED_RET_TO_USER
  473. select PLAT_IOP
  474. select PCI
  475. select ARCH_REQUIRE_GPIOLIB
  476. help
  477. Support for Intel's IOP33X (XScale) family of processors.
  478. config ARCH_IXP4XX
  479. bool "IXP4xx-based"
  480. depends on MMU
  481. select ARCH_HAS_DMA_SET_COHERENT_MASK
  482. select CLKSRC_MMIO
  483. select CPU_XSCALE
  484. select ARCH_REQUIRE_GPIOLIB
  485. select GENERIC_CLOCKEVENTS
  486. select MIGHT_HAVE_PCI
  487. select NEED_MACH_IO_H
  488. select DMABOUNCE if PCI
  489. help
  490. Support for Intel's IXP4XX (XScale) family of processors.
  491. config ARCH_MVEBU
  492. bool "Marvell SOCs with Device Tree support"
  493. select GENERIC_CLOCKEVENTS
  494. select MULTI_IRQ_HANDLER
  495. select SPARSE_IRQ
  496. select CLKSRC_MMIO
  497. select GENERIC_IRQ_CHIP
  498. select IRQ_DOMAIN
  499. select COMMON_CLK
  500. help
  501. Support for the Marvell SoC Family with device tree support
  502. config ARCH_DOVE
  503. bool "Marvell Dove"
  504. select CPU_V7
  505. select PCI
  506. select ARCH_REQUIRE_GPIOLIB
  507. select GENERIC_CLOCKEVENTS
  508. select PLAT_ORION
  509. help
  510. Support for the Marvell Dove SoC 88AP510
  511. config ARCH_KIRKWOOD
  512. bool "Marvell Kirkwood"
  513. select CPU_FEROCEON
  514. select PCI
  515. select ARCH_REQUIRE_GPIOLIB
  516. select GENERIC_CLOCKEVENTS
  517. select PLAT_ORION
  518. help
  519. Support for the following Marvell Kirkwood series SoCs:
  520. 88F6180, 88F6192 and 88F6281.
  521. config ARCH_LPC32XX
  522. bool "NXP LPC32XX"
  523. select CLKSRC_MMIO
  524. select CPU_ARM926T
  525. select ARCH_REQUIRE_GPIOLIB
  526. select HAVE_IDE
  527. select ARM_AMBA
  528. select USB_ARCH_HAS_OHCI
  529. select CLKDEV_LOOKUP
  530. select GENERIC_CLOCKEVENTS
  531. select USE_OF
  532. select HAVE_PWM
  533. help
  534. Support for the NXP LPC32XX family of processors
  535. config ARCH_MV78XX0
  536. bool "Marvell MV78xx0"
  537. select CPU_FEROCEON
  538. select PCI
  539. select ARCH_REQUIRE_GPIOLIB
  540. select GENERIC_CLOCKEVENTS
  541. select PLAT_ORION
  542. help
  543. Support for the following Marvell MV78xx0 series SoCs:
  544. MV781x0, MV782x0.
  545. config ARCH_ORION5X
  546. bool "Marvell Orion"
  547. depends on MMU
  548. select CPU_FEROCEON
  549. select PCI
  550. select ARCH_REQUIRE_GPIOLIB
  551. select GENERIC_CLOCKEVENTS
  552. select PLAT_ORION
  553. help
  554. Support for the following Marvell Orion 5x series SoCs:
  555. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  556. Orion-2 (5281), Orion-1-90 (6183).
  557. config ARCH_MMP
  558. bool "Marvell PXA168/910/MMP2"
  559. depends on MMU
  560. select ARCH_REQUIRE_GPIOLIB
  561. select CLKDEV_LOOKUP
  562. select GENERIC_CLOCKEVENTS
  563. select GPIO_PXA
  564. select IRQ_DOMAIN
  565. select PLAT_PXA
  566. select SPARSE_IRQ
  567. select GENERIC_ALLOCATOR
  568. help
  569. Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
  570. config ARCH_KS8695
  571. bool "Micrel/Kendin KS8695"
  572. select CPU_ARM922T
  573. select ARCH_REQUIRE_GPIOLIB
  574. select NEED_MACH_MEMORY_H
  575. select CLKSRC_MMIO
  576. select GENERIC_CLOCKEVENTS
  577. help
  578. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  579. System-on-Chip devices.
  580. config ARCH_W90X900
  581. bool "Nuvoton W90X900 CPU"
  582. select CPU_ARM926T
  583. select ARCH_REQUIRE_GPIOLIB
  584. select CLKDEV_LOOKUP
  585. select CLKSRC_MMIO
  586. select GENERIC_CLOCKEVENTS
  587. help
  588. Support for Nuvoton (Winbond logic dept.) ARM9 processor,
  589. At present, the w90x900 has been renamed nuc900, regarding
  590. the ARM series product line, you can login the following
  591. link address to know more.
  592. <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
  593. ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
  594. config ARCH_TEGRA
  595. bool "NVIDIA Tegra"
  596. select CLKDEV_LOOKUP
  597. select CLKSRC_MMIO
  598. select GENERIC_CLOCKEVENTS
  599. select GENERIC_GPIO
  600. select HAVE_CLK
  601. select HAVE_SMP
  602. select MIGHT_HAVE_CACHE_L2X0
  603. select ARCH_HAS_CPUFREQ
  604. select USE_OF
  605. select COMMON_CLK
  606. help
  607. This enables support for NVIDIA Tegra based systems (Tegra APX,
  608. Tegra 6xx and Tegra 2 series).
  609. config ARCH_PICOXCELL
  610. bool "Picochip picoXcell"
  611. select ARCH_REQUIRE_GPIOLIB
  612. select ARM_PATCH_PHYS_VIRT
  613. select ARM_VIC
  614. select CPU_V6K
  615. select DW_APB_TIMER
  616. select DW_APB_TIMER_OF
  617. select GENERIC_CLOCKEVENTS
  618. select GENERIC_GPIO
  619. select HAVE_TCM
  620. select NO_IOPORT
  621. select SPARSE_IRQ
  622. select USE_OF
  623. help
  624. This enables support for systems based on the Picochip picoXcell
  625. family of Femtocell devices. The picoxcell support requires device tree
  626. for all boards.
  627. config ARCH_PXA
  628. bool "PXA2xx/PXA3xx-based"
  629. depends on MMU
  630. select ARCH_MTD_XIP
  631. select ARCH_HAS_CPUFREQ
  632. select CLKDEV_LOOKUP
  633. select CLKSRC_MMIO
  634. select ARCH_REQUIRE_GPIOLIB
  635. select GENERIC_CLOCKEVENTS
  636. select GPIO_PXA
  637. select PLAT_PXA
  638. select SPARSE_IRQ
  639. select AUTO_ZRELADDR
  640. select MULTI_IRQ_HANDLER
  641. select ARM_CPU_SUSPEND if PM
  642. select HAVE_IDE
  643. help
  644. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  645. config ARCH_MSM
  646. bool "Qualcomm MSM"
  647. select HAVE_CLK
  648. select GENERIC_CLOCKEVENTS
  649. select ARCH_REQUIRE_GPIOLIB
  650. select CLKDEV_LOOKUP
  651. help
  652. Support for Qualcomm MSM/QSD based systems. This runs on the
  653. apps processor of the MSM/QSD and depends on a shared memory
  654. interface to the modem processor which runs the baseband
  655. stack and controls some vital subsystems
  656. (clock and power control, etc).
  657. config ARCH_SHMOBILE
  658. bool "Renesas SH-Mobile / R-Mobile"
  659. select HAVE_CLK
  660. select CLKDEV_LOOKUP
  661. select HAVE_MACH_CLKDEV
  662. select HAVE_SMP
  663. select GENERIC_CLOCKEVENTS
  664. select MIGHT_HAVE_CACHE_L2X0
  665. select NO_IOPORT
  666. select SPARSE_IRQ
  667. select MULTI_IRQ_HANDLER
  668. select PM_GENERIC_DOMAINS if PM
  669. select NEED_MACH_MEMORY_H
  670. help
  671. Support for Renesas's SH-Mobile and R-Mobile ARM platforms.
  672. config ARCH_RPC
  673. bool "RiscPC"
  674. select ARCH_ACORN
  675. select FIQ
  676. select ARCH_MAY_HAVE_PC_FDC
  677. select HAVE_PATA_PLATFORM
  678. select ISA_DMA_API
  679. select NO_IOPORT
  680. select ARCH_SPARSEMEM_ENABLE
  681. select ARCH_USES_GETTIMEOFFSET
  682. select HAVE_IDE
  683. select NEED_MACH_IO_H
  684. select NEED_MACH_MEMORY_H
  685. help
  686. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  687. CD-ROM interface, serial and parallel port, and the floppy drive.
  688. config ARCH_SA1100
  689. bool "SA1100-based"
  690. select CLKSRC_MMIO
  691. select CPU_SA1100
  692. select ISA
  693. select ARCH_SPARSEMEM_ENABLE
  694. select ARCH_MTD_XIP
  695. select ARCH_HAS_CPUFREQ
  696. select CPU_FREQ
  697. select GENERIC_CLOCKEVENTS
  698. select CLKDEV_LOOKUP
  699. select ARCH_REQUIRE_GPIOLIB
  700. select HAVE_IDE
  701. select NEED_MACH_MEMORY_H
  702. select SPARSE_IRQ
  703. help
  704. Support for StrongARM 11x0 based boards.
  705. config ARCH_S3C24XX
  706. bool "Samsung S3C24XX SoCs"
  707. select GENERIC_GPIO
  708. select ARCH_HAS_CPUFREQ
  709. select HAVE_CLK
  710. select CLKDEV_LOOKUP
  711. select ARCH_USES_GETTIMEOFFSET
  712. select HAVE_S3C2410_I2C if I2C
  713. select HAVE_S3C_RTC if RTC_CLASS
  714. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  715. select NEED_MACH_IO_H
  716. help
  717. Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443
  718. and S3C2450 SoCs based systems, such as the Simtec Electronics BAST
  719. (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or the
  720. Samsung SMDK2410 development board (and derivatives).
  721. config ARCH_S3C64XX
  722. bool "Samsung S3C64XX"
  723. select PLAT_SAMSUNG
  724. select CPU_V6
  725. select ARM_VIC
  726. select HAVE_CLK
  727. select HAVE_TCM
  728. select CLKDEV_LOOKUP
  729. select NO_IOPORT
  730. select ARCH_USES_GETTIMEOFFSET
  731. select ARCH_HAS_CPUFREQ
  732. select ARCH_REQUIRE_GPIOLIB
  733. select SAMSUNG_CLKSRC
  734. select SAMSUNG_IRQ_VIC_TIMER
  735. select S3C_GPIO_TRACK
  736. select S3C_DEV_NAND
  737. select USB_ARCH_HAS_OHCI
  738. select SAMSUNG_GPIOLIB_4BIT
  739. select HAVE_S3C2410_I2C if I2C
  740. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  741. help
  742. Samsung S3C64XX series based systems
  743. config ARCH_S5P64X0
  744. bool "Samsung S5P6440 S5P6450"
  745. select CPU_V6
  746. select GENERIC_GPIO
  747. select HAVE_CLK
  748. select CLKDEV_LOOKUP
  749. select CLKSRC_MMIO
  750. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  751. select GENERIC_CLOCKEVENTS
  752. select HAVE_S3C2410_I2C if I2C
  753. select HAVE_S3C_RTC if RTC_CLASS
  754. help
  755. Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
  756. SMDK6450.
  757. config ARCH_S5PC100
  758. bool "Samsung S5PC100"
  759. select GENERIC_GPIO
  760. select HAVE_CLK
  761. select CLKDEV_LOOKUP
  762. select CPU_V7
  763. select ARCH_USES_GETTIMEOFFSET
  764. select HAVE_S3C2410_I2C if I2C
  765. select HAVE_S3C_RTC if RTC_CLASS
  766. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  767. help
  768. Samsung S5PC100 series based systems
  769. config ARCH_S5PV210
  770. bool "Samsung S5PV210/S5PC110"
  771. select CPU_V7
  772. select ARCH_SPARSEMEM_ENABLE
  773. select ARCH_HAS_HOLES_MEMORYMODEL
  774. select GENERIC_GPIO
  775. select HAVE_CLK
  776. select CLKDEV_LOOKUP
  777. select CLKSRC_MMIO
  778. select ARCH_HAS_CPUFREQ
  779. select GENERIC_CLOCKEVENTS
  780. select HAVE_S3C2410_I2C if I2C
  781. select HAVE_S3C_RTC if RTC_CLASS
  782. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  783. select NEED_MACH_MEMORY_H
  784. help
  785. Samsung S5PV210/S5PC110 series based systems
  786. config ARCH_EXYNOS
  787. bool "SAMSUNG EXYNOS"
  788. select CPU_V7
  789. select ARCH_SPARSEMEM_ENABLE
  790. select ARCH_HAS_HOLES_MEMORYMODEL
  791. select GENERIC_GPIO
  792. select HAVE_CLK
  793. select CLKDEV_LOOKUP
  794. select ARCH_HAS_CPUFREQ
  795. select GENERIC_CLOCKEVENTS
  796. select HAVE_S3C_RTC if RTC_CLASS
  797. select HAVE_S3C2410_I2C if I2C
  798. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  799. select NEED_MACH_MEMORY_H
  800. help
  801. Support for SAMSUNG's EXYNOS SoCs (EXYNOS4/5)
  802. config ARCH_SHARK
  803. bool "Shark"
  804. select CPU_SA110
  805. select ISA
  806. select ISA_DMA
  807. select ZONE_DMA
  808. select PCI
  809. select ARCH_USES_GETTIMEOFFSET
  810. select NEED_MACH_MEMORY_H
  811. help
  812. Support for the StrongARM based Digital DNARD machine, also known
  813. as "Shark" (<http://www.shark-linux.de/shark.html>).
  814. config ARCH_U300
  815. bool "ST-Ericsson U300 Series"
  816. depends on MMU
  817. select CLKSRC_MMIO
  818. select CPU_ARM926T
  819. select HAVE_TCM
  820. select ARM_AMBA
  821. select ARM_PATCH_PHYS_VIRT
  822. select ARM_VIC
  823. select GENERIC_CLOCKEVENTS
  824. select CLKDEV_LOOKUP
  825. select COMMON_CLK
  826. select GENERIC_GPIO
  827. select ARCH_REQUIRE_GPIOLIB
  828. select SPARSE_IRQ
  829. help
  830. Support for ST-Ericsson U300 series mobile platforms.
  831. config ARCH_U8500
  832. bool "ST-Ericsson U8500 Series"
  833. depends on MMU
  834. select CPU_V7
  835. select ARM_AMBA
  836. select GENERIC_CLOCKEVENTS
  837. select CLKDEV_LOOKUP
  838. select ARCH_REQUIRE_GPIOLIB
  839. select ARCH_HAS_CPUFREQ
  840. select HAVE_SMP
  841. select MIGHT_HAVE_CACHE_L2X0
  842. help
  843. Support for ST-Ericsson's Ux500 architecture
  844. config ARCH_NOMADIK
  845. bool "STMicroelectronics Nomadik"
  846. select ARM_AMBA
  847. select ARM_VIC
  848. select CPU_ARM926T
  849. select COMMON_CLK
  850. select GENERIC_CLOCKEVENTS
  851. select PINCTRL
  852. select MIGHT_HAVE_CACHE_L2X0
  853. select ARCH_REQUIRE_GPIOLIB
  854. help
  855. Support for the Nomadik platform by ST-Ericsson
  856. config ARCH_DAVINCI
  857. bool "TI DaVinci"
  858. select GENERIC_CLOCKEVENTS
  859. select ARCH_REQUIRE_GPIOLIB
  860. select ZONE_DMA
  861. select HAVE_IDE
  862. select CLKDEV_LOOKUP
  863. select GENERIC_ALLOCATOR
  864. select GENERIC_IRQ_CHIP
  865. select ARCH_HAS_HOLES_MEMORYMODEL
  866. help
  867. Support for TI's DaVinci platform.
  868. config ARCH_OMAP
  869. bool "TI OMAP"
  870. depends on MMU
  871. select HAVE_CLK
  872. select ARCH_REQUIRE_GPIOLIB
  873. select ARCH_HAS_CPUFREQ
  874. select CLKSRC_MMIO
  875. select GENERIC_CLOCKEVENTS
  876. select ARCH_HAS_HOLES_MEMORYMODEL
  877. help
  878. Support for TI's OMAP platform (OMAP1/2/3/4).
  879. config PLAT_SPEAR
  880. bool "ST SPEAr"
  881. select ARM_AMBA
  882. select ARCH_REQUIRE_GPIOLIB
  883. select CLKDEV_LOOKUP
  884. select COMMON_CLK
  885. select CLKSRC_MMIO
  886. select GENERIC_CLOCKEVENTS
  887. select HAVE_CLK
  888. help
  889. Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
  890. config ARCH_VT8500
  891. bool "VIA/WonderMedia 85xx"
  892. select CPU_ARM926T
  893. select GENERIC_GPIO
  894. select ARCH_HAS_CPUFREQ
  895. select GENERIC_CLOCKEVENTS
  896. select ARCH_REQUIRE_GPIOLIB
  897. select USE_OF
  898. select COMMON_CLK
  899. select HAVE_CLK
  900. select CLKDEV_LOOKUP
  901. help
  902. Support for VIA/WonderMedia VT8500/WM85xx System-on-Chip.
  903. config ARCH_ZYNQ
  904. bool "Xilinx Zynq ARM Cortex A9 Platform"
  905. select CPU_V7
  906. select GENERIC_CLOCKEVENTS
  907. select CLKDEV_LOOKUP
  908. select ARM_GIC
  909. select ARM_AMBA
  910. select ICST
  911. select MIGHT_HAVE_CACHE_L2X0
  912. select USE_OF
  913. help
  914. Support for Xilinx Zynq ARM Cortex A9 Platform
  915. endchoice
  916. #
  917. # This is sorted alphabetically by mach-* pathname. However, plat-*
  918. # Kconfigs may be included either alphabetically (according to the
  919. # plat- suffix) or along side the corresponding mach-* source.
  920. #
  921. source "arch/arm/mach-mvebu/Kconfig"
  922. source "arch/arm/mach-at91/Kconfig"
  923. source "arch/arm/mach-clps711x/Kconfig"
  924. source "arch/arm/mach-cns3xxx/Kconfig"
  925. source "arch/arm/mach-davinci/Kconfig"
  926. source "arch/arm/mach-dove/Kconfig"
  927. source "arch/arm/mach-ep93xx/Kconfig"
  928. source "arch/arm/mach-footbridge/Kconfig"
  929. source "arch/arm/mach-gemini/Kconfig"
  930. source "arch/arm/mach-h720x/Kconfig"
  931. source "arch/arm/mach-integrator/Kconfig"
  932. source "arch/arm/mach-iop32x/Kconfig"
  933. source "arch/arm/mach-iop33x/Kconfig"
  934. source "arch/arm/mach-iop13xx/Kconfig"
  935. source "arch/arm/mach-ixp4xx/Kconfig"
  936. source "arch/arm/mach-kirkwood/Kconfig"
  937. source "arch/arm/mach-ks8695/Kconfig"
  938. source "arch/arm/mach-msm/Kconfig"
  939. source "arch/arm/mach-mv78xx0/Kconfig"
  940. source "arch/arm/plat-mxc/Kconfig"
  941. source "arch/arm/mach-mxs/Kconfig"
  942. source "arch/arm/mach-netx/Kconfig"
  943. source "arch/arm/mach-nomadik/Kconfig"
  944. source "arch/arm/plat-nomadik/Kconfig"
  945. source "arch/arm/plat-omap/Kconfig"
  946. source "arch/arm/mach-omap1/Kconfig"
  947. source "arch/arm/mach-omap2/Kconfig"
  948. source "arch/arm/mach-orion5x/Kconfig"
  949. source "arch/arm/mach-pxa/Kconfig"
  950. source "arch/arm/plat-pxa/Kconfig"
  951. source "arch/arm/mach-mmp/Kconfig"
  952. source "arch/arm/mach-realview/Kconfig"
  953. source "arch/arm/mach-sa1100/Kconfig"
  954. source "arch/arm/plat-samsung/Kconfig"
  955. source "arch/arm/plat-s3c24xx/Kconfig"
  956. source "arch/arm/plat-spear/Kconfig"
  957. source "arch/arm/mach-s3c24xx/Kconfig"
  958. if ARCH_S3C24XX
  959. source "arch/arm/mach-s3c2412/Kconfig"
  960. source "arch/arm/mach-s3c2440/Kconfig"
  961. endif
  962. if ARCH_S3C64XX
  963. source "arch/arm/mach-s3c64xx/Kconfig"
  964. endif
  965. source "arch/arm/mach-s5p64x0/Kconfig"
  966. source "arch/arm/mach-s5pc100/Kconfig"
  967. source "arch/arm/mach-s5pv210/Kconfig"
  968. source "arch/arm/mach-exynos/Kconfig"
  969. source "arch/arm/mach-shmobile/Kconfig"
  970. source "arch/arm/mach-prima2/Kconfig"
  971. source "arch/arm/mach-tegra/Kconfig"
  972. source "arch/arm/mach-u300/Kconfig"
  973. source "arch/arm/mach-ux500/Kconfig"
  974. source "arch/arm/mach-versatile/Kconfig"
  975. source "arch/arm/mach-vexpress/Kconfig"
  976. source "arch/arm/plat-versatile/Kconfig"
  977. source "arch/arm/mach-w90x900/Kconfig"
  978. # Definitions to make life easier
  979. config ARCH_ACORN
  980. bool
  981. config PLAT_IOP
  982. bool
  983. select GENERIC_CLOCKEVENTS
  984. config PLAT_ORION
  985. bool
  986. select CLKSRC_MMIO
  987. select GENERIC_IRQ_CHIP
  988. select IRQ_DOMAIN
  989. select COMMON_CLK
  990. config PLAT_PXA
  991. bool
  992. config PLAT_VERSATILE
  993. bool
  994. config ARM_TIMER_SP804
  995. bool
  996. select CLKSRC_MMIO
  997. select HAVE_SCHED_CLOCK
  998. source arch/arm/mm/Kconfig
  999. config ARM_NR_BANKS
  1000. int
  1001. default 16 if ARCH_EP93XX
  1002. default 8
  1003. config IWMMXT
  1004. bool "Enable iWMMXt support"
  1005. depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
  1006. default y if PXA27x || PXA3xx || PXA95x || ARCH_MMP
  1007. help
  1008. Enable support for iWMMXt context switching at run time if
  1009. running on a CPU that supports it.
  1010. config XSCALE_PMU
  1011. bool
  1012. depends on CPU_XSCALE
  1013. default y
  1014. config MULTI_IRQ_HANDLER
  1015. bool
  1016. help
  1017. Allow each machine to specify it's own IRQ handler at run time.
  1018. if !MMU
  1019. source "arch/arm/Kconfig-nommu"
  1020. endif
  1021. config ARM_ERRATA_326103
  1022. bool "ARM errata: FSR write bit incorrect on a SWP to read-only memory"
  1023. depends on CPU_V6
  1024. help
  1025. Executing a SWP instruction to read-only memory does not set bit 11
  1026. of the FSR on the ARM 1136 prior to r1p0. This causes the kernel to
  1027. treat the access as a read, preventing a COW from occurring and
  1028. causing the faulting task to livelock.
  1029. config ARM_ERRATA_411920
  1030. bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
  1031. depends on CPU_V6 || CPU_V6K
  1032. help
  1033. Invalidation of the Instruction Cache operation can
  1034. fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
  1035. It does not affect the MPCore. This option enables the ARM Ltd.
  1036. recommended workaround.
  1037. config ARM_ERRATA_430973
  1038. bool "ARM errata: Stale prediction on replaced interworking branch"
  1039. depends on CPU_V7
  1040. help
  1041. This option enables the workaround for the 430973 Cortex-A8
  1042. (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
  1043. interworking branch is replaced with another code sequence at the
  1044. same virtual address, whether due to self-modifying code or virtual
  1045. to physical address re-mapping, Cortex-A8 does not recover from the
  1046. stale interworking branch prediction. This results in Cortex-A8
  1047. executing the new code sequence in the incorrect ARM or Thumb state.
  1048. The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
  1049. and also flushes the branch target cache at every context switch.
  1050. Note that setting specific bits in the ACTLR register may not be
  1051. available in non-secure mode.
  1052. config ARM_ERRATA_458693
  1053. bool "ARM errata: Processor deadlock when a false hazard is created"
  1054. depends on CPU_V7
  1055. help
  1056. This option enables the workaround for the 458693 Cortex-A8 (r2p0)
  1057. erratum. For very specific sequences of memory operations, it is
  1058. possible for a hazard condition intended for a cache line to instead
  1059. be incorrectly associated with a different cache line. This false
  1060. hazard might then cause a processor deadlock. The workaround enables
  1061. the L1 caching of the NEON accesses and disables the PLD instruction
  1062. in the ACTLR register. Note that setting specific bits in the ACTLR
  1063. register may not be available in non-secure mode.
  1064. config ARM_ERRATA_460075
  1065. bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
  1066. depends on CPU_V7
  1067. help
  1068. This option enables the workaround for the 460075 Cortex-A8 (r2p0)
  1069. erratum. Any asynchronous access to the L2 cache may encounter a
  1070. situation in which recent store transactions to the L2 cache are lost
  1071. and overwritten with stale memory contents from external memory. The
  1072. workaround disables the write-allocate mode for the L2 cache via the
  1073. ACTLR register. Note that setting specific bits in the ACTLR register
  1074. may not be available in non-secure mode.
  1075. config ARM_ERRATA_742230
  1076. bool "ARM errata: DMB operation may be faulty"
  1077. depends on CPU_V7 && SMP
  1078. help
  1079. This option enables the workaround for the 742230 Cortex-A9
  1080. (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
  1081. between two write operations may not ensure the correct visibility
  1082. ordering of the two writes. This workaround sets a specific bit in
  1083. the diagnostic register of the Cortex-A9 which causes the DMB
  1084. instruction to behave as a DSB, ensuring the correct behaviour of
  1085. the two writes.
  1086. config ARM_ERRATA_742231
  1087. bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
  1088. depends on CPU_V7 && SMP
  1089. help
  1090. This option enables the workaround for the 742231 Cortex-A9
  1091. (r2p0..r2p2) erratum. Under certain conditions, specific to the
  1092. Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
  1093. accessing some data located in the same cache line, may get corrupted
  1094. data due to bad handling of the address hazard when the line gets
  1095. replaced from one of the CPUs at the same time as another CPU is
  1096. accessing it. This workaround sets specific bits in the diagnostic
  1097. register of the Cortex-A9 which reduces the linefill issuing
  1098. capabilities of the processor.
  1099. config PL310_ERRATA_588369
  1100. bool "PL310 errata: Clean & Invalidate maintenance operations do not invalidate clean lines"
  1101. depends on CACHE_L2X0
  1102. help
  1103. The PL310 L2 cache controller implements three types of Clean &
  1104. Invalidate maintenance operations: by Physical Address
  1105. (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
  1106. They are architecturally defined to behave as the execution of a
  1107. clean operation followed immediately by an invalidate operation,
  1108. both performing to the same memory location. This functionality
  1109. is not correctly implemented in PL310 as clean lines are not
  1110. invalidated as a result of these operations.
  1111. config ARM_ERRATA_720789
  1112. bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
  1113. depends on CPU_V7
  1114. help
  1115. This option enables the workaround for the 720789 Cortex-A9 (prior to
  1116. r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
  1117. broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
  1118. As a consequence of this erratum, some TLB entries which should be
  1119. invalidated are not, resulting in an incoherency in the system page
  1120. tables. The workaround changes the TLB flushing routines to invalidate
  1121. entries regardless of the ASID.
  1122. config PL310_ERRATA_727915
  1123. bool "PL310 errata: Background Clean & Invalidate by Way operation can cause data corruption"
  1124. depends on CACHE_L2X0
  1125. help
  1126. PL310 implements the Clean & Invalidate by Way L2 cache maintenance
  1127. operation (offset 0x7FC). This operation runs in background so that
  1128. PL310 can handle normal accesses while it is in progress. Under very
  1129. rare circumstances, due to this erratum, write data can be lost when
  1130. PL310 treats a cacheable write transaction during a Clean &
  1131. Invalidate by Way operation.
  1132. config ARM_ERRATA_743622
  1133. bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
  1134. depends on CPU_V7
  1135. help
  1136. This option enables the workaround for the 743622 Cortex-A9
  1137. (r2p*) erratum. Under very rare conditions, a faulty
  1138. optimisation in the Cortex-A9 Store Buffer may lead to data
  1139. corruption. This workaround sets a specific bit in the diagnostic
  1140. register of the Cortex-A9 which disables the Store Buffer
  1141. optimisation, preventing the defect from occurring. This has no
  1142. visible impact on the overall performance or power consumption of the
  1143. processor.
  1144. config ARM_ERRATA_751472
  1145. bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
  1146. depends on CPU_V7
  1147. help
  1148. This option enables the workaround for the 751472 Cortex-A9 (prior
  1149. to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
  1150. completion of a following broadcasted operation if the second
  1151. operation is received by a CPU before the ICIALLUIS has completed,
  1152. potentially leading to corrupted entries in the cache or TLB.
  1153. config PL310_ERRATA_753970
  1154. bool "PL310 errata: cache sync operation may be faulty"
  1155. depends on CACHE_PL310
  1156. help
  1157. This option enables the workaround for the 753970 PL310 (r3p0) erratum.
  1158. Under some condition the effect of cache sync operation on
  1159. the store buffer still remains when the operation completes.
  1160. This means that the store buffer is always asked to drain and
  1161. this prevents it from merging any further writes. The workaround
  1162. is to replace the normal offset of cache sync operation (0x730)
  1163. by another offset targeting an unmapped PL310 register 0x740.
  1164. This has the same effect as the cache sync operation: store buffer
  1165. drain and waiting for all buffers empty.
  1166. config ARM_ERRATA_754322
  1167. bool "ARM errata: possible faulty MMU translations following an ASID switch"
  1168. depends on CPU_V7
  1169. help
  1170. This option enables the workaround for the 754322 Cortex-A9 (r2p*,
  1171. r3p*) erratum. A speculative memory access may cause a page table walk
  1172. which starts prior to an ASID switch but completes afterwards. This
  1173. can populate the micro-TLB with a stale entry which may be hit with
  1174. the new ASID. This workaround places two dsb instructions in the mm
  1175. switching code so that no page table walks can cross the ASID switch.
  1176. config ARM_ERRATA_754327
  1177. bool "ARM errata: no automatic Store Buffer drain"
  1178. depends on CPU_V7 && SMP
  1179. help
  1180. This option enables the workaround for the 754327 Cortex-A9 (prior to
  1181. r2p0) erratum. The Store Buffer does not have any automatic draining
  1182. mechanism and therefore a livelock may occur if an external agent
  1183. continuously polls a memory location waiting to observe an update.
  1184. This workaround defines cpu_relax() as smp_mb(), preventing correctly
  1185. written polling loops from denying visibility of updates to memory.
  1186. config ARM_ERRATA_364296
  1187. bool "ARM errata: Possible cache data corruption with hit-under-miss enabled"
  1188. depends on CPU_V6 && !SMP
  1189. help
  1190. This options enables the workaround for the 364296 ARM1136
  1191. r0p2 erratum (possible cache data corruption with
  1192. hit-under-miss enabled). It sets the undocumented bit 31 in
  1193. the auxiliary control register and the FI bit in the control
  1194. register, thus disabling hit-under-miss without putting the
  1195. processor into full low interrupt latency mode. ARM11MPCore
  1196. is not affected.
  1197. config ARM_ERRATA_764369
  1198. bool "ARM errata: Data cache line maintenance operation by MVA may not succeed"
  1199. depends on CPU_V7 && SMP
  1200. help
  1201. This option enables the workaround for erratum 764369
  1202. affecting Cortex-A9 MPCore with two or more processors (all
  1203. current revisions). Under certain timing circumstances, a data
  1204. cache line maintenance operation by MVA targeting an Inner
  1205. Shareable memory region may fail to proceed up to either the
  1206. Point of Coherency or to the Point of Unification of the
  1207. system. This workaround adds a DSB instruction before the
  1208. relevant cache maintenance functions and sets a specific bit
  1209. in the diagnostic control register of the SCU.
  1210. config PL310_ERRATA_769419
  1211. bool "PL310 errata: no automatic Store Buffer drain"
  1212. depends on CACHE_L2X0
  1213. help
  1214. On revisions of the PL310 prior to r3p2, the Store Buffer does
  1215. not automatically drain. This can cause normal, non-cacheable
  1216. writes to be retained when the memory system is idle, leading
  1217. to suboptimal I/O performance for drivers using coherent DMA.
  1218. This option adds a write barrier to the cpu_idle loop so that,
  1219. on systems with an outer cache, the store buffer is drained
  1220. explicitly.
  1221. endmenu
  1222. source "arch/arm/common/Kconfig"
  1223. menu "Bus support"
  1224. config ARM_AMBA
  1225. bool
  1226. config ISA
  1227. bool
  1228. help
  1229. Find out whether you have ISA slots on your motherboard. ISA is the
  1230. name of a bus system, i.e. the way the CPU talks to the other stuff
  1231. inside your box. Other bus systems are PCI, EISA, MicroChannel
  1232. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  1233. newer boards don't support it. If you have ISA, say Y, otherwise N.
  1234. # Select ISA DMA controller support
  1235. config ISA_DMA
  1236. bool
  1237. select ISA_DMA_API
  1238. # Select ISA DMA interface
  1239. config ISA_DMA_API
  1240. bool
  1241. config PCI
  1242. bool "PCI support" if MIGHT_HAVE_PCI
  1243. help
  1244. Find out whether you have a PCI motherboard. PCI is the name of a
  1245. bus system, i.e. the way the CPU talks to the other stuff inside
  1246. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  1247. VESA. If you have PCI, say Y, otherwise N.
  1248. config PCI_DOMAINS
  1249. bool
  1250. depends on PCI
  1251. config PCI_NANOENGINE
  1252. bool "BSE nanoEngine PCI support"
  1253. depends on SA1100_NANOENGINE
  1254. help
  1255. Enable PCI on the BSE nanoEngine board.
  1256. config PCI_SYSCALL
  1257. def_bool PCI
  1258. # Select the host bridge type
  1259. config PCI_HOST_VIA82C505
  1260. bool
  1261. depends on PCI && ARCH_SHARK
  1262. default y
  1263. config PCI_HOST_ITE8152
  1264. bool
  1265. depends on PCI && MACH_ARMCORE
  1266. default y
  1267. select DMABOUNCE
  1268. source "drivers/pci/Kconfig"
  1269. source "drivers/pcmcia/Kconfig"
  1270. endmenu
  1271. menu "Kernel Features"
  1272. config HAVE_SMP
  1273. bool
  1274. help
  1275. This option should be selected by machines which have an SMP-
  1276. capable CPU.
  1277. The only effect of this option is to make the SMP-related
  1278. options available to the user for configuration.
  1279. config SMP
  1280. bool "Symmetric Multi-Processing"
  1281. depends on CPU_V6K || CPU_V7
  1282. depends on GENERIC_CLOCKEVENTS
  1283. depends on HAVE_SMP
  1284. depends on MMU
  1285. select USE_GENERIC_SMP_HELPERS
  1286. select HAVE_ARM_SCU if !ARCH_MSM_SCORPIONMP
  1287. help
  1288. This enables support for systems with more than one CPU. If you have
  1289. a system with only one CPU, like most personal computers, say N. If
  1290. you have a system with more than one CPU, say Y.
  1291. If you say N here, the kernel will run on single and multiprocessor
  1292. machines, but will use only one CPU of a multiprocessor machine. If
  1293. you say Y here, the kernel will run on many, but not all, single
  1294. processor machines. On a single processor machine, the kernel will
  1295. run faster if you say N here.
  1296. See also <file:Documentation/x86/i386/IO-APIC.txt>,
  1297. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  1298. <http://tldp.org/HOWTO/SMP-HOWTO.html>.
  1299. If you don't know what to do here, say N.
  1300. config SMP_ON_UP
  1301. bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
  1302. depends on EXPERIMENTAL
  1303. depends on SMP && !XIP_KERNEL
  1304. default y
  1305. help
  1306. SMP kernels contain instructions which fail on non-SMP processors.
  1307. Enabling this option allows the kernel to modify itself to make
  1308. these instructions safe. Disabling it allows about 1K of space
  1309. savings.
  1310. If you don't know what to do here, say Y.
  1311. config ARM_CPU_TOPOLOGY
  1312. bool "Support cpu topology definition"
  1313. depends on SMP && CPU_V7
  1314. default y
  1315. help
  1316. Support ARM cpu topology definition. The MPIDR register defines
  1317. affinity between processors which is then used to describe the cpu
  1318. topology of an ARM System.
  1319. config SCHED_MC
  1320. bool "Multi-core scheduler support"
  1321. depends on ARM_CPU_TOPOLOGY
  1322. help
  1323. Multi-core scheduler support improves the CPU scheduler's decision
  1324. making when dealing with multi-core CPU chips at a cost of slightly
  1325. increased overhead in some places. If unsure say N here.
  1326. config SCHED_SMT
  1327. bool "SMT scheduler support"
  1328. depends on ARM_CPU_TOPOLOGY
  1329. help
  1330. Improves the CPU scheduler's decision making when dealing with
  1331. MultiThreading at a cost of slightly increased overhead in some
  1332. places. If unsure say N here.
  1333. config HAVE_ARM_SCU
  1334. bool
  1335. help
  1336. This option enables support for the ARM system coherency unit
  1337. config ARM_ARCH_TIMER
  1338. bool "Architected timer support"
  1339. depends on CPU_V7
  1340. help
  1341. This option enables support for the ARM architected timer
  1342. config HAVE_ARM_TWD
  1343. bool
  1344. depends on SMP
  1345. help
  1346. This options enables support for the ARM timer and watchdog unit
  1347. choice
  1348. prompt "Memory split"
  1349. default VMSPLIT_3G
  1350. help
  1351. Select the desired split between kernel and user memory.
  1352. If you are not absolutely sure what you are doing, leave this
  1353. option alone!
  1354. config VMSPLIT_3G
  1355. bool "3G/1G user/kernel split"
  1356. config VMSPLIT_2G
  1357. bool "2G/2G user/kernel split"
  1358. config VMSPLIT_1G
  1359. bool "1G/3G user/kernel split"
  1360. endchoice
  1361. config PAGE_OFFSET
  1362. hex
  1363. default 0x40000000 if VMSPLIT_1G
  1364. default 0x80000000 if VMSPLIT_2G
  1365. default 0xC0000000
  1366. config NR_CPUS
  1367. int "Maximum number of CPUs (2-32)"
  1368. range 2 32
  1369. depends on SMP
  1370. default "4"
  1371. config HOTPLUG_CPU
  1372. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  1373. depends on SMP && HOTPLUG && EXPERIMENTAL
  1374. help
  1375. Say Y here to experiment with turning CPUs off and on. CPUs
  1376. can be controlled through /sys/devices/system/cpu.
  1377. config LOCAL_TIMERS
  1378. bool "Use local timer interrupts"
  1379. depends on SMP
  1380. default y
  1381. select HAVE_ARM_TWD if (!ARCH_MSM_SCORPIONMP && !EXYNOS4_MCT)
  1382. help
  1383. Enable support for local timers on SMP platforms, rather then the
  1384. legacy IPI broadcast method. Local timers allows the system
  1385. accounting to be spread across the timer interval, preventing a
  1386. "thundering herd" at every timer tick.
  1387. config ARCH_NR_GPIO
  1388. int
  1389. default 1024 if ARCH_SHMOBILE || ARCH_TEGRA
  1390. default 355 if ARCH_U8500
  1391. default 264 if MACH_H4700
  1392. default 512 if SOC_OMAP5
  1393. default 288 if ARCH_VT8500
  1394. default 0
  1395. help
  1396. Maximum number of GPIOs in the system.
  1397. If unsure, leave the default value.
  1398. source kernel/Kconfig.preempt
  1399. config HZ
  1400. int
  1401. default 200 if ARCH_EBSA110 || ARCH_S3C24XX || ARCH_S5P64X0 || \
  1402. ARCH_S5PV210 || ARCH_EXYNOS4
  1403. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  1404. default AT91_TIMER_HZ if ARCH_AT91
  1405. default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
  1406. default 100
  1407. config THUMB2_KERNEL
  1408. bool "Compile the kernel in Thumb-2 mode (EXPERIMENTAL)"
  1409. depends on CPU_V7 && !CPU_V6 && !CPU_V6K && EXPERIMENTAL
  1410. select AEABI
  1411. select ARM_ASM_UNIFIED
  1412. select ARM_UNWIND
  1413. help
  1414. By enabling this option, the kernel will be compiled in
  1415. Thumb-2 mode. A compiler/assembler that understand the unified
  1416. ARM-Thumb syntax is needed.
  1417. If unsure, say N.
  1418. config THUMB2_AVOID_R_ARM_THM_JUMP11
  1419. bool "Work around buggy Thumb-2 short branch relocations in gas"
  1420. depends on THUMB2_KERNEL && MODULES
  1421. default y
  1422. help
  1423. Various binutils versions can resolve Thumb-2 branches to
  1424. locally-defined, preemptible global symbols as short-range "b.n"
  1425. branch instructions.
  1426. This is a problem, because there's no guarantee the final
  1427. destination of the symbol, or any candidate locations for a
  1428. trampoline, are within range of the branch. For this reason, the
  1429. kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
  1430. relocation in modules at all, and it makes little sense to add
  1431. support.
  1432. The symptom is that the kernel fails with an "unsupported
  1433. relocation" error when loading some modules.
  1434. Until fixed tools are available, passing
  1435. -fno-optimize-sibling-calls to gcc should prevent gcc generating
  1436. code which hits this problem, at the cost of a bit of extra runtime
  1437. stack usage in some cases.
  1438. The problem is described in more detail at:
  1439. https://bugs.launchpad.net/binutils-linaro/+bug/725126
  1440. Only Thumb-2 kernels are affected.
  1441. Unless you are sure your tools don't have this problem, say Y.
  1442. config ARM_ASM_UNIFIED
  1443. bool
  1444. config AEABI
  1445. bool "Use the ARM EABI to compile the kernel"
  1446. help
  1447. This option allows for the kernel to be compiled using the latest
  1448. ARM ABI (aka EABI). This is only useful if you are using a user
  1449. space environment that is also compiled with EABI.
  1450. Since there are major incompatibilities between the legacy ABI and
  1451. EABI, especially with regard to structure member alignment, this
  1452. option also changes the kernel syscall calling convention to
  1453. disambiguate both ABIs and allow for backward compatibility support
  1454. (selected with CONFIG_OABI_COMPAT).
  1455. To use this you need GCC version 4.0.0 or later.
  1456. config OABI_COMPAT
  1457. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  1458. depends on AEABI && EXPERIMENTAL && !THUMB2_KERNEL
  1459. default y
  1460. help
  1461. This option preserves the old syscall interface along with the
  1462. new (ARM EABI) one. It also provides a compatibility layer to
  1463. intercept syscalls that have structure arguments which layout
  1464. in memory differs between the legacy ABI and the new ARM EABI
  1465. (only for non "thumb" binaries). This option adds a tiny
  1466. overhead to all syscalls and produces a slightly larger kernel.
  1467. If you know you'll be using only pure EABI user space then you
  1468. can say N here. If this option is not selected and you attempt
  1469. to execute a legacy ABI binary then the result will be
  1470. UNPREDICTABLE (in fact it can be predicted that it won't work
  1471. at all). If in doubt say Y.
  1472. config ARCH_HAS_HOLES_MEMORYMODEL
  1473. bool
  1474. config ARCH_SPARSEMEM_ENABLE
  1475. bool
  1476. config ARCH_SPARSEMEM_DEFAULT
  1477. def_bool ARCH_SPARSEMEM_ENABLE
  1478. config ARCH_SELECT_MEMORY_MODEL
  1479. def_bool ARCH_SPARSEMEM_ENABLE
  1480. config HAVE_ARCH_PFN_VALID
  1481. def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
  1482. config HIGHMEM
  1483. bool "High Memory Support"
  1484. depends on MMU
  1485. help
  1486. The address space of ARM processors is only 4 Gigabytes large
  1487. and it has to accommodate user address space, kernel address
  1488. space as well as some memory mapped IO. That means that, if you
  1489. have a large amount of physical memory and/or IO, not all of the
  1490. memory can be "permanently mapped" by the kernel. The physical
  1491. memory that is not permanently mapped is called "high memory".
  1492. Depending on the selected kernel/user memory split, minimum
  1493. vmalloc space and actual amount of RAM, you may not need this
  1494. option which should result in a slightly faster kernel.
  1495. If unsure, say n.
  1496. config HIGHPTE
  1497. bool "Allocate 2nd-level pagetables from highmem"
  1498. depends on HIGHMEM
  1499. config HW_PERF_EVENTS
  1500. bool "Enable hardware performance counter support for perf events"
  1501. depends on PERF_EVENTS
  1502. default y
  1503. help
  1504. Enable hardware performance counter support for perf events. If
  1505. disabled, perf events will use software events only.
  1506. source "mm/Kconfig"
  1507. config FORCE_MAX_ZONEORDER
  1508. int "Maximum zone order" if ARCH_SHMOBILE
  1509. range 11 64 if ARCH_SHMOBILE
  1510. default "9" if SA1111
  1511. default "11"
  1512. help
  1513. The kernel memory allocator divides physically contiguous memory
  1514. blocks into "zones", where each zone is a power of two number of
  1515. pages. This option selects the largest power of two that the kernel
  1516. keeps in the memory allocator. If you need to allocate very large
  1517. blocks of physically contiguous memory, then you may need to
  1518. increase this value.
  1519. This config option is actually maximum order plus one. For example,
  1520. a value of 11 means that the largest free memory block is 2^10 pages.
  1521. config ALIGNMENT_TRAP
  1522. bool
  1523. depends on CPU_CP15_MMU
  1524. default y if !ARCH_EBSA110
  1525. select HAVE_PROC_CPU if PROC_FS
  1526. help
  1527. ARM processors cannot fetch/store information which is not
  1528. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  1529. address divisible by 4. On 32-bit ARM processors, these non-aligned
  1530. fetch/store instructions will be emulated in software if you say
  1531. here, which has a severe performance impact. This is necessary for
  1532. correct operation of some network protocols. With an IP-only
  1533. configuration it is safe to say N, otherwise say Y.
  1534. config UACCESS_WITH_MEMCPY
  1535. bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
  1536. depends on MMU && EXPERIMENTAL
  1537. default y if CPU_FEROCEON
  1538. help
  1539. Implement faster copy_to_user and clear_user methods for CPU
  1540. cores where a 8-word STM instruction give significantly higher
  1541. memory write throughput than a sequence of individual 32bit stores.
  1542. A possible side effect is a slight increase in scheduling latency
  1543. between threads sharing the same address space if they invoke
  1544. such copy operations with large buffers.
  1545. However, if the CPU data cache is using a write-allocate mode,
  1546. this option is unlikely to provide any performance gain.
  1547. config SECCOMP
  1548. bool
  1549. prompt "Enable seccomp to safely compute untrusted bytecode"
  1550. ---help---
  1551. This kernel feature is useful for number crunching applications
  1552. that may need to compute untrusted bytecode during their
  1553. execution. By using pipes or other transports made available to
  1554. the process as file descriptors supporting the read/write
  1555. syscalls, it's possible to isolate those applications in
  1556. their own address space using seccomp. Once seccomp is
  1557. enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
  1558. and the task is only allowed to execute a few safe syscalls
  1559. defined by each seccomp mode.
  1560. config CC_STACKPROTECTOR
  1561. bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
  1562. depends on EXPERIMENTAL
  1563. help
  1564. This option turns on the -fstack-protector GCC feature. This
  1565. feature puts, at the beginning of functions, a canary value on
  1566. the stack just before the return address, and validates
  1567. the value just before actually returning. Stack based buffer
  1568. overflows (that need to overwrite this return address) now also
  1569. overwrite the canary, which gets detected and the attack is then
  1570. neutralized via a kernel panic.
  1571. This feature requires gcc version 4.2 or above.
  1572. config DEPRECATED_PARAM_STRUCT
  1573. bool "Provide old way to pass kernel parameters"
  1574. help
  1575. This was deprecated in 2001 and announced to live on for 5 years.
  1576. Some old boot loaders still use this way.
  1577. endmenu
  1578. menu "Boot options"
  1579. config USE_OF
  1580. bool "Flattened Device Tree support"
  1581. select OF
  1582. select OF_EARLY_FLATTREE
  1583. select IRQ_DOMAIN
  1584. help
  1585. Include support for flattened device tree machine descriptions.
  1586. # Compressed boot loader in ROM. Yes, we really want to ask about
  1587. # TEXT and BSS so we preserve their values in the config files.
  1588. config ZBOOT_ROM_TEXT
  1589. hex "Compressed ROM boot loader base address"
  1590. default "0"
  1591. help
  1592. The physical address at which the ROM-able zImage is to be
  1593. placed in the target. Platforms which normally make use of
  1594. ROM-able zImage formats normally set this to a suitable
  1595. value in their defconfig file.
  1596. If ZBOOT_ROM is not enabled, this has no effect.
  1597. config ZBOOT_ROM_BSS
  1598. hex "Compressed ROM boot loader BSS address"
  1599. default "0"
  1600. help
  1601. The base address of an area of read/write memory in the target
  1602. for the ROM-able zImage which must be available while the
  1603. decompressor is running. It must be large enough to hold the
  1604. entire decompressed kernel plus an additional 128 KiB.
  1605. Platforms which normally make use of ROM-able zImage formats
  1606. normally set this to a suitable value in their defconfig file.
  1607. If ZBOOT_ROM is not enabled, this has no effect.
  1608. config ZBOOT_ROM
  1609. bool "Compressed boot loader in ROM/flash"
  1610. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  1611. help
  1612. Say Y here if you intend to execute your compressed kernel image
  1613. (zImage) directly from ROM or flash. If unsure, say N.
  1614. choice
  1615. prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)"
  1616. depends on ZBOOT_ROM && ARCH_SH7372 && EXPERIMENTAL
  1617. default ZBOOT_ROM_NONE
  1618. help
  1619. Include experimental SD/MMC loading code in the ROM-able zImage.
  1620. With this enabled it is possible to write the ROM-able zImage
  1621. kernel image to an MMC or SD card and boot the kernel straight
  1622. from the reset vector. At reset the processor Mask ROM will load
  1623. the first part of the ROM-able zImage which in turn loads the
  1624. rest the kernel image to RAM.
  1625. config ZBOOT_ROM_NONE
  1626. bool "No SD/MMC loader in zImage (EXPERIMENTAL)"
  1627. help
  1628. Do not load image from SD or MMC
  1629. config ZBOOT_ROM_MMCIF
  1630. bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
  1631. help
  1632. Load image from MMCIF hardware block.
  1633. config ZBOOT_ROM_SH_MOBILE_SDHI
  1634. bool "Include SuperH Mobile SDHI loader in zImage (EXPERIMENTAL)"
  1635. help
  1636. Load image from SDHI hardware block
  1637. endchoice
  1638. config ARM_APPENDED_DTB
  1639. bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
  1640. depends on OF && !ZBOOT_ROM && EXPERIMENTAL
  1641. help
  1642. With this option, the boot code will look for a device tree binary
  1643. (DTB) appended to zImage
  1644. (e.g. cat zImage <filename>.dtb > zImage_w_dtb).
  1645. This is meant as a backward compatibility convenience for those
  1646. systems with a bootloader that can't be upgraded to accommodate
  1647. the documented boot protocol using a device tree.
  1648. Beware that there is very little in terms of protection against
  1649. this option being confused by leftover garbage in memory that might
  1650. look like a DTB header after a reboot if no actual DTB is appended
  1651. to zImage. Do not leave this option active in a production kernel
  1652. if you don't intend to always append a DTB. Proper passing of the
  1653. location into r2 of a bootloader provided DTB is always preferable
  1654. to this option.
  1655. config ARM_ATAG_DTB_COMPAT
  1656. bool "Supplement the appended DTB with traditional ATAG information"
  1657. depends on ARM_APPENDED_DTB
  1658. help
  1659. Some old bootloaders can't be updated to a DTB capable one, yet
  1660. they provide ATAGs with memory configuration, the ramdisk address,
  1661. the kernel cmdline string, etc. Such information is dynamically
  1662. provided by the bootloader and can't always be stored in a static
  1663. DTB. To allow a device tree enabled kernel to be used with such
  1664. bootloaders, this option allows zImage to extract the information
  1665. from the ATAG list and store it at run time into the appended DTB.
  1666. choice
  1667. prompt "Kernel command line type" if ARM_ATAG_DTB_COMPAT
  1668. default ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
  1669. config ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
  1670. bool "Use bootloader kernel arguments if available"
  1671. help
  1672. Uses the command-line options passed by the boot loader instead of
  1673. the device tree bootargs property. If the boot loader doesn't provide
  1674. any, the device tree bootargs property will be used.
  1675. config ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEND
  1676. bool "Extend with bootloader kernel arguments"
  1677. help
  1678. The command-line arguments provided by the boot loader will be
  1679. appended to the the device tree bootargs property.
  1680. endchoice
  1681. config CMDLINE
  1682. string "Default kernel command string"
  1683. default ""
  1684. help
  1685. On some architectures (EBSA110 and CATS), there is currently no way
  1686. for the boot loader to pass arguments to the kernel. For these
  1687. architectures, you should supply some command-line options at build
  1688. time by entering them here. As a minimum, you should specify the
  1689. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  1690. choice
  1691. prompt "Kernel command line type" if CMDLINE != ""
  1692. default CMDLINE_FROM_BOOTLOADER
  1693. config CMDLINE_FROM_BOOTLOADER
  1694. bool "Use bootloader kernel arguments if available"
  1695. help
  1696. Uses the command-line options passed by the boot loader. If
  1697. the boot loader doesn't provide any, the default kernel command
  1698. string provided in CMDLINE will be used.
  1699. config CMDLINE_EXTEND
  1700. bool "Extend bootloader kernel arguments"
  1701. help
  1702. The command-line arguments provided by the boot loader will be
  1703. appended to the default kernel command string.
  1704. config CMDLINE_FORCE
  1705. bool "Always use the default kernel command string"
  1706. help
  1707. Always use the default kernel command string, even if the boot
  1708. loader passes other arguments to the kernel.
  1709. This is useful if you cannot or don't want to change the
  1710. command-line options your boot loader passes to the kernel.
  1711. endchoice
  1712. config XIP_KERNEL
  1713. bool "Kernel Execute-In-Place from ROM"
  1714. depends on !ZBOOT_ROM && !ARM_LPAE
  1715. help
  1716. Execute-In-Place allows the kernel to run from non-volatile storage
  1717. directly addressable by the CPU, such as NOR flash. This saves RAM
  1718. space since the text section of the kernel is not loaded from flash
  1719. to RAM. Read-write sections, such as the data section and stack,
  1720. are still copied to RAM. The XIP kernel is not compressed since
  1721. it has to run directly from flash, so it will take more space to
  1722. store it. The flash address used to link the kernel object files,
  1723. and for storing it, is configuration dependent. Therefore, if you
  1724. say Y here, you must know the proper physical address where to
  1725. store the kernel image depending on your own flash memory usage.
  1726. Also note that the make target becomes "make xipImage" rather than
  1727. "make zImage" or "make Image". The final kernel binary to put in
  1728. ROM memory will be arch/arm/boot/xipImage.
  1729. If unsure, say N.
  1730. config XIP_PHYS_ADDR
  1731. hex "XIP Kernel Physical Location"
  1732. depends on XIP_KERNEL
  1733. default "0x00080000"
  1734. help
  1735. This is the physical address in your flash memory the kernel will
  1736. be linked for and stored to. This address is dependent on your
  1737. own flash usage.
  1738. config KEXEC
  1739. bool "Kexec system call (EXPERIMENTAL)"
  1740. depends on EXPERIMENTAL && (!SMP || HOTPLUG_CPU)
  1741. help
  1742. kexec is a system call that implements the ability to shutdown your
  1743. current kernel, and to start another kernel. It is like a reboot
  1744. but it is independent of the system firmware. And like a reboot
  1745. you can start any kernel with it, not just Linux.
  1746. It is an ongoing process to be certain the hardware in a machine
  1747. is properly shutdown, so do not be surprised if this code does not
  1748. initially work for you. It may help to enable device hotplugging
  1749. support.
  1750. config ATAGS_PROC
  1751. bool "Export atags in procfs"
  1752. depends on KEXEC
  1753. default y
  1754. help
  1755. Should the atags used to boot the kernel be exported in an "atags"
  1756. file in procfs. Useful with kexec.
  1757. config CRASH_DUMP
  1758. bool "Build kdump crash kernel (EXPERIMENTAL)"
  1759. depends on EXPERIMENTAL
  1760. help
  1761. Generate crash dump after being started by kexec. This should
  1762. be normally only set in special crash dump kernels which are
  1763. loaded in the main kernel with kexec-tools into a specially
  1764. reserved region and then later executed after a crash by
  1765. kdump/kexec. The crash dump kernel must be compiled to a
  1766. memory address not used by the main kernel
  1767. For more details see Documentation/kdump/kdump.txt
  1768. config AUTO_ZRELADDR
  1769. bool "Auto calculation of the decompressed kernel image address"
  1770. depends on !ZBOOT_ROM && !ARCH_U300
  1771. help
  1772. ZRELADDR is the physical address where the decompressed kernel
  1773. image will be placed. If AUTO_ZRELADDR is selected, the address
  1774. will be determined at run-time by masking the current IP with
  1775. 0xf8000000. This assumes the zImage being placed in the first 128MB
  1776. from start of memory.
  1777. endmenu
  1778. menu "CPU Power Management"
  1779. if ARCH_HAS_CPUFREQ
  1780. source "drivers/cpufreq/Kconfig"
  1781. config CPU_FREQ_IMX
  1782. tristate "CPUfreq driver for i.MX CPUs"
  1783. depends on ARCH_MXC && CPU_FREQ
  1784. select CPU_FREQ_TABLE
  1785. help
  1786. This enables the CPUfreq driver for i.MX CPUs.
  1787. config CPU_FREQ_SA1100
  1788. bool
  1789. config CPU_FREQ_SA1110
  1790. bool
  1791. config CPU_FREQ_INTEGRATOR
  1792. tristate "CPUfreq driver for ARM Integrator CPUs"
  1793. depends on ARCH_INTEGRATOR && CPU_FREQ
  1794. default y
  1795. help
  1796. This enables the CPUfreq driver for ARM Integrator CPUs.
  1797. For details, take a look at <file:Documentation/cpu-freq>.
  1798. If in doubt, say Y.
  1799. config CPU_FREQ_PXA
  1800. bool
  1801. depends on CPU_FREQ && ARCH_PXA && PXA25x
  1802. default y
  1803. select CPU_FREQ_TABLE
  1804. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  1805. config CPU_FREQ_S3C
  1806. bool
  1807. help
  1808. Internal configuration node for common cpufreq on Samsung SoC
  1809. config CPU_FREQ_S3C24XX
  1810. bool "CPUfreq driver for Samsung S3C24XX series CPUs (EXPERIMENTAL)"
  1811. depends on ARCH_S3C24XX && CPU_FREQ && EXPERIMENTAL
  1812. select CPU_FREQ_S3C
  1813. help
  1814. This enables the CPUfreq driver for the Samsung S3C24XX family
  1815. of CPUs.
  1816. For details, take a look at <file:Documentation/cpu-freq>.
  1817. If in doubt, say N.
  1818. config CPU_FREQ_S3C24XX_PLL
  1819. bool "Support CPUfreq changing of PLL frequency (EXPERIMENTAL)"
  1820. depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
  1821. help
  1822. Compile in support for changing the PLL frequency from the
  1823. S3C24XX series CPUfreq driver. The PLL takes time to settle
  1824. after a frequency change, so by default it is not enabled.
  1825. This also means that the PLL tables for the selected CPU(s) will
  1826. be built which may increase the size of the kernel image.
  1827. config CPU_FREQ_S3C24XX_DEBUG
  1828. bool "Debug CPUfreq Samsung driver core"
  1829. depends on CPU_FREQ_S3C24XX
  1830. help
  1831. Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
  1832. config CPU_FREQ_S3C24XX_IODEBUG
  1833. bool "Debug CPUfreq Samsung driver IO timing"
  1834. depends on CPU_FREQ_S3C24XX
  1835. help
  1836. Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
  1837. config CPU_FREQ_S3C24XX_DEBUGFS
  1838. bool "Export debugfs for CPUFreq"
  1839. depends on CPU_FREQ_S3C24XX && DEBUG_FS
  1840. help
  1841. Export status information via debugfs.
  1842. endif
  1843. source "drivers/cpuidle/Kconfig"
  1844. endmenu
  1845. menu "Floating point emulation"
  1846. comment "At least one emulation must be selected"
  1847. config FPE_NWFPE
  1848. bool "NWFPE math emulation"
  1849. depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
  1850. ---help---
  1851. Say Y to include the NWFPE floating point emulator in the kernel.
  1852. This is necessary to run most binaries. Linux does not currently
  1853. support floating point hardware so you need to say Y here even if
  1854. your machine has an FPA or floating point co-processor podule.
  1855. You may say N here if you are going to load the Acorn FPEmulator
  1856. early in the bootup.
  1857. config FPE_NWFPE_XP
  1858. bool "Support extended precision"
  1859. depends on FPE_NWFPE
  1860. help
  1861. Say Y to include 80-bit support in the kernel floating-point
  1862. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  1863. Note that gcc does not generate 80-bit operations by default,
  1864. so in most cases this option only enlarges the size of the
  1865. floating point emulator without any good reason.
  1866. You almost surely want to say N here.
  1867. config FPE_FASTFPE
  1868. bool "FastFPE math emulation (EXPERIMENTAL)"
  1869. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  1870. ---help---
  1871. Say Y here to include the FAST floating point emulator in the kernel.
  1872. This is an experimental much faster emulator which now also has full
  1873. precision for the mantissa. It does not support any exceptions.
  1874. It is very simple, and approximately 3-6 times faster than NWFPE.
  1875. It should be sufficient for most programs. It may be not suitable
  1876. for scientific calculations, but you have to check this for yourself.
  1877. If you do not feel you need a faster FP emulation you should better
  1878. choose NWFPE.
  1879. config VFP
  1880. bool "VFP-format floating point maths"
  1881. depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  1882. help
  1883. Say Y to include VFP support code in the kernel. This is needed
  1884. if your hardware includes a VFP unit.
  1885. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  1886. release notes and additional status information.
  1887. Say N if your target does not have VFP hardware.
  1888. config VFPv3
  1889. bool
  1890. depends on VFP
  1891. default y if CPU_V7
  1892. config NEON
  1893. bool "Advanced SIMD (NEON) Extension support"
  1894. depends on VFPv3 && CPU_V7
  1895. help
  1896. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  1897. Extension.
  1898. endmenu
  1899. menu "Userspace binary formats"
  1900. source "fs/Kconfig.binfmt"
  1901. config ARTHUR
  1902. tristate "RISC OS personality"
  1903. depends on !AEABI
  1904. help
  1905. Say Y here to include the kernel code necessary if you want to run
  1906. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  1907. experimental; if this sounds frightening, say N and sleep in peace.
  1908. You can also say M here to compile this support as a module (which
  1909. will be called arthur).
  1910. endmenu
  1911. menu "Power management options"
  1912. source "kernel/power/Kconfig"
  1913. config ARCH_SUSPEND_POSSIBLE
  1914. depends on !ARCH_S5PC100
  1915. depends on CPU_ARM920T || CPU_ARM926T || CPU_SA1100 || \
  1916. CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE || CPU_MOHAWK
  1917. def_bool y
  1918. config ARM_CPU_SUSPEND
  1919. def_bool PM_SLEEP
  1920. endmenu
  1921. source "net/Kconfig"
  1922. source "drivers/Kconfig"
  1923. source "fs/Kconfig"
  1924. source "arch/arm/Kconfig.debug"
  1925. source "security/Kconfig"
  1926. source "crypto/Kconfig"
  1927. source "lib/Kconfig"