Kconfig 66 KB

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  1. config ARM
  2. bool
  3. default y
  4. select ARCH_BINFMT_ELF_RANDOMIZE_PIE
  5. select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
  6. select ARCH_HAVE_CUSTOM_GPIO_H
  7. select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
  8. select ARCH_WANT_IPC_PARSE_VERSION
  9. select BUILDTIME_EXTABLE_SORT if MMU
  10. select CPU_PM if (SUSPEND || CPU_IDLE)
  11. select DCACHE_WORD_ACCESS if (CPU_V6 || CPU_V6K || CPU_V7) && !CPU_BIG_ENDIAN && MMU
  12. select GENERIC_ATOMIC64 if (CPU_V6 || !CPU_32v6K || !AEABI)
  13. select GENERIC_CLOCKEVENTS_BROADCAST if SMP
  14. select GENERIC_IRQ_PROBE
  15. select GENERIC_IRQ_SHOW
  16. select GENERIC_PCI_IOMAP
  17. select GENERIC_SMP_IDLE_THREAD
  18. select GENERIC_STRNCPY_FROM_USER
  19. select GENERIC_STRNLEN_USER
  20. select HARDIRQS_SW_RESEND
  21. select HAVE_AOUT
  22. select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL
  23. select HAVE_ARCH_KGDB
  24. select HAVE_ARCH_SECCOMP_FILTER
  25. select HAVE_ARCH_TRACEHOOK
  26. select HAVE_BPF_JIT
  27. select HAVE_C_RECORDMCOUNT
  28. select HAVE_DEBUG_KMEMLEAK
  29. select HAVE_DMA_API_DEBUG
  30. select HAVE_DMA_ATTRS
  31. select HAVE_DMA_CONTIGUOUS if MMU
  32. select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL)
  33. select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
  34. select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL)
  35. select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
  36. select HAVE_GENERIC_DMA_COHERENT
  37. select HAVE_GENERIC_HARDIRQS
  38. select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7))
  39. select HAVE_IDE if PCI || ISA || PCMCIA
  40. select HAVE_KERNEL_GZIP
  41. select HAVE_KERNEL_LZMA
  42. select HAVE_KERNEL_LZO
  43. select HAVE_KERNEL_XZ
  44. select HAVE_KPROBES if !XIP_KERNEL
  45. select HAVE_KRETPROBES if (HAVE_KPROBES)
  46. select HAVE_MEMBLOCK
  47. select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
  48. select HAVE_PERF_EVENTS
  49. select HAVE_REGS_AND_STACK_ACCESS_API
  50. select HAVE_SYSCALL_TRACEPOINTS
  51. select HAVE_UID16
  52. select HAVE_VIRT_TO_BUS
  53. select KTIME_SCALAR
  54. select PERF_USE_VMALLOC
  55. select RTC_LIB
  56. select SYS_SUPPORTS_APM_EMULATION
  57. select HAVE_MOD_ARCH_SPECIFIC if ARM_UNWIND
  58. select MODULES_USE_ELF_REL
  59. select CLONE_BACKWARDS
  60. select OLD_SIGSUSPEND3
  61. select OLD_SIGACTION
  62. help
  63. The ARM series is a line of low-power-consumption RISC chip designs
  64. licensed by ARM Ltd and targeted at embedded applications and
  65. handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
  66. manufactured, but legacy ARM-based PC hardware remains popular in
  67. Europe. There is an ARM Linux project with a web page at
  68. <http://www.arm.linux.org.uk/>.
  69. config ARM_HAS_SG_CHAIN
  70. bool
  71. config NEED_SG_DMA_LENGTH
  72. bool
  73. config ARM_DMA_USE_IOMMU
  74. bool
  75. select ARM_HAS_SG_CHAIN
  76. select NEED_SG_DMA_LENGTH
  77. if ARM_DMA_USE_IOMMU
  78. config ARM_DMA_IOMMU_ALIGNMENT
  79. int "Maximum PAGE_SIZE order of alignment for DMA IOMMU buffers"
  80. range 4 9
  81. default 8
  82. help
  83. DMA mapping framework by default aligns all buffers to the smallest
  84. PAGE_SIZE order which is greater than or equal to the requested buffer
  85. size. This works well for buffers up to a few hundreds kilobytes, but
  86. for larger buffers it just a waste of address space. Drivers which has
  87. relatively small addressing window (like 64Mib) might run out of
  88. virtual space with just a few allocations.
  89. With this parameter you can specify the maximum PAGE_SIZE order for
  90. DMA IOMMU buffers. Larger buffers will be aligned only to this
  91. specified order. The order is expressed as a power of two multiplied
  92. by the PAGE_SIZE.
  93. endif
  94. config HAVE_PWM
  95. bool
  96. config MIGHT_HAVE_PCI
  97. bool
  98. config SYS_SUPPORTS_APM_EMULATION
  99. bool
  100. config GENERIC_GPIO
  101. bool
  102. config HAVE_TCM
  103. bool
  104. select GENERIC_ALLOCATOR
  105. config HAVE_PROC_CPU
  106. bool
  107. config NO_IOPORT
  108. bool
  109. config EISA
  110. bool
  111. ---help---
  112. The Extended Industry Standard Architecture (EISA) bus was
  113. developed as an open alternative to the IBM MicroChannel bus.
  114. The EISA bus provided some of the features of the IBM MicroChannel
  115. bus while maintaining backward compatibility with cards made for
  116. the older ISA bus. The EISA bus saw limited use between 1988 and
  117. 1995 when it was made obsolete by the PCI bus.
  118. Say Y here if you are building a kernel for an EISA-based machine.
  119. Otherwise, say N.
  120. config SBUS
  121. bool
  122. config STACKTRACE_SUPPORT
  123. bool
  124. default y
  125. config HAVE_LATENCYTOP_SUPPORT
  126. bool
  127. depends on !SMP
  128. default y
  129. config LOCKDEP_SUPPORT
  130. bool
  131. default y
  132. config TRACE_IRQFLAGS_SUPPORT
  133. bool
  134. default y
  135. config RWSEM_GENERIC_SPINLOCK
  136. bool
  137. default y
  138. config RWSEM_XCHGADD_ALGORITHM
  139. bool
  140. config ARCH_HAS_ILOG2_U32
  141. bool
  142. config ARCH_HAS_ILOG2_U64
  143. bool
  144. config ARCH_HAS_CPUFREQ
  145. bool
  146. help
  147. Internal node to signify that the ARCH has CPUFREQ support
  148. and that the relevant menu configurations are displayed for
  149. it.
  150. config GENERIC_HWEIGHT
  151. bool
  152. default y
  153. config GENERIC_CALIBRATE_DELAY
  154. bool
  155. default y
  156. config ARCH_MAY_HAVE_PC_FDC
  157. bool
  158. config ZONE_DMA
  159. bool
  160. config NEED_DMA_MAP_STATE
  161. def_bool y
  162. config ARCH_HAS_DMA_SET_COHERENT_MASK
  163. bool
  164. config GENERIC_ISA_DMA
  165. bool
  166. config FIQ
  167. bool
  168. config NEED_RET_TO_USER
  169. bool
  170. config ARCH_MTD_XIP
  171. bool
  172. config VECTORS_BASE
  173. hex
  174. default 0xffff0000 if MMU || CPU_HIGH_VECTOR
  175. default DRAM_BASE if REMAP_VECTORS_TO_RAM
  176. default 0x00000000
  177. help
  178. The base address of exception vectors.
  179. config ARM_PATCH_PHYS_VIRT
  180. bool "Patch physical to virtual translations at runtime" if EMBEDDED
  181. default y
  182. depends on !XIP_KERNEL && MMU
  183. depends on !ARCH_REALVIEW || !SPARSEMEM
  184. help
  185. Patch phys-to-virt and virt-to-phys translation functions at
  186. boot and module load time according to the position of the
  187. kernel in system memory.
  188. This can only be used with non-XIP MMU kernels where the base
  189. of physical memory is at a 16MB boundary.
  190. Only disable this option if you know that you do not require
  191. this feature (eg, building a kernel for a single machine) and
  192. you need to shrink the kernel to the minimal size.
  193. config NEED_MACH_GPIO_H
  194. bool
  195. help
  196. Select this when mach/gpio.h is required to provide special
  197. definitions for this platform. The need for mach/gpio.h should
  198. be avoided when possible.
  199. config NEED_MACH_IO_H
  200. bool
  201. help
  202. Select this when mach/io.h is required to provide special
  203. definitions for this platform. The need for mach/io.h should
  204. be avoided when possible.
  205. config NEED_MACH_MEMORY_H
  206. bool
  207. help
  208. Select this when mach/memory.h is required to provide special
  209. definitions for this platform. The need for mach/memory.h should
  210. be avoided when possible.
  211. config PHYS_OFFSET
  212. hex "Physical address of main memory" if MMU
  213. depends on !ARM_PATCH_PHYS_VIRT && !NEED_MACH_MEMORY_H
  214. default DRAM_BASE if !MMU
  215. help
  216. Please provide the physical address corresponding to the
  217. location of main memory in your system.
  218. config GENERIC_BUG
  219. def_bool y
  220. depends on BUG
  221. source "init/Kconfig"
  222. source "kernel/Kconfig.freezer"
  223. menu "System Type"
  224. config MMU
  225. bool "MMU-based Paged Memory Management Support"
  226. default y
  227. help
  228. Select if you want MMU-based virtualised addressing space
  229. support by paged memory management. If unsure, say 'Y'.
  230. #
  231. # The "ARM system type" choice list is ordered alphabetically by option
  232. # text. Please add new entries in the option alphabetic order.
  233. #
  234. choice
  235. prompt "ARM system type"
  236. default ARCH_VERSATILE if !MMU
  237. default ARCH_MULTIPLATFORM if MMU
  238. config ARCH_MULTIPLATFORM
  239. bool "Allow multiple platforms to be selected"
  240. depends on MMU
  241. select ARM_PATCH_PHYS_VIRT
  242. select AUTO_ZRELADDR
  243. select COMMON_CLK
  244. select MULTI_IRQ_HANDLER
  245. select SPARSE_IRQ
  246. select USE_OF
  247. config ARCH_INTEGRATOR
  248. bool "ARM Ltd. Integrator family"
  249. select ARCH_HAS_CPUFREQ
  250. select ARM_AMBA
  251. select COMMON_CLK
  252. select COMMON_CLK_VERSATILE
  253. select GENERIC_CLOCKEVENTS
  254. select HAVE_TCM
  255. select ICST
  256. select MULTI_IRQ_HANDLER
  257. select NEED_MACH_MEMORY_H
  258. select PLAT_VERSATILE
  259. select SPARSE_IRQ
  260. select VERSATILE_FPGA_IRQ
  261. help
  262. Support for ARM's Integrator platform.
  263. config ARCH_REALVIEW
  264. bool "ARM Ltd. RealView family"
  265. select ARCH_WANT_OPTIONAL_GPIOLIB
  266. select ARM_AMBA
  267. select ARM_TIMER_SP804
  268. select COMMON_CLK
  269. select COMMON_CLK_VERSATILE
  270. select GENERIC_CLOCKEVENTS
  271. select GPIO_PL061 if GPIOLIB
  272. select ICST
  273. select NEED_MACH_MEMORY_H
  274. select PLAT_VERSATILE
  275. select PLAT_VERSATILE_CLCD
  276. help
  277. This enables support for ARM Ltd RealView boards.
  278. config ARCH_VERSATILE
  279. bool "ARM Ltd. Versatile family"
  280. select ARCH_WANT_OPTIONAL_GPIOLIB
  281. select ARM_AMBA
  282. select ARM_TIMER_SP804
  283. select ARM_VIC
  284. select CLKDEV_LOOKUP
  285. select GENERIC_CLOCKEVENTS
  286. select HAVE_MACH_CLKDEV
  287. select ICST
  288. select PLAT_VERSATILE
  289. select PLAT_VERSATILE_CLCD
  290. select PLAT_VERSATILE_CLOCK
  291. select VERSATILE_FPGA_IRQ
  292. help
  293. This enables support for ARM Ltd Versatile board.
  294. config ARCH_AT91
  295. bool "Atmel AT91"
  296. select ARCH_REQUIRE_GPIOLIB
  297. select CLKDEV_LOOKUP
  298. select HAVE_CLK
  299. select IRQ_DOMAIN
  300. select NEED_MACH_GPIO_H
  301. select NEED_MACH_IO_H if PCCARD
  302. select PINCTRL
  303. select PINCTRL_AT91 if USE_OF
  304. help
  305. This enables support for systems based on Atmel
  306. AT91RM9200 and AT91SAM9* processors.
  307. config ARCH_BCM2835
  308. bool "Broadcom BCM2835 family"
  309. select ARCH_REQUIRE_GPIOLIB
  310. select ARM_AMBA
  311. select ARM_ERRATA_411920
  312. select ARM_TIMER_SP804
  313. select CLKDEV_LOOKUP
  314. select CLKSRC_OF
  315. select COMMON_CLK
  316. select CPU_V6
  317. select GENERIC_CLOCKEVENTS
  318. select MULTI_IRQ_HANDLER
  319. select PINCTRL
  320. select PINCTRL_BCM2835
  321. select SPARSE_IRQ
  322. select USE_OF
  323. help
  324. This enables support for the Broadcom BCM2835 SoC. This SoC is
  325. use in the Raspberry Pi, and Roku 2 devices.
  326. config ARCH_CNS3XXX
  327. bool "Cavium Networks CNS3XXX family"
  328. select ARM_GIC
  329. select CPU_V6K
  330. select GENERIC_CLOCKEVENTS
  331. select MIGHT_HAVE_CACHE_L2X0
  332. select MIGHT_HAVE_PCI
  333. select PCI_DOMAINS if PCI
  334. select SPARSE_IRQ
  335. help
  336. Support for Cavium Networks CNS3XXX platform.
  337. config ARCH_CLPS711X
  338. bool "Cirrus Logic CLPS711x/EP721x/EP731x-based"
  339. select ARCH_REQUIRE_GPIOLIB
  340. select AUTO_ZRELADDR
  341. select CLKDEV_LOOKUP
  342. select COMMON_CLK
  343. select CPU_ARM720T
  344. select GENERIC_CLOCKEVENTS
  345. select MULTI_IRQ_HANDLER
  346. select NEED_MACH_MEMORY_H
  347. select SPARSE_IRQ
  348. help
  349. Support for Cirrus Logic 711x/721x/731x based boards.
  350. config ARCH_GEMINI
  351. bool "Cortina Systems Gemini"
  352. select ARCH_REQUIRE_GPIOLIB
  353. select ARCH_USES_GETTIMEOFFSET
  354. select CPU_FA526
  355. help
  356. Support for the Cortina Systems Gemini family SoCs
  357. config ARCH_SIRF
  358. bool "CSR SiRF"
  359. select ARCH_REQUIRE_GPIOLIB
  360. select AUTO_ZRELADDR
  361. select COMMON_CLK
  362. select GENERIC_CLOCKEVENTS
  363. select GENERIC_IRQ_CHIP
  364. select MIGHT_HAVE_CACHE_L2X0
  365. select NO_IOPORT
  366. select PINCTRL
  367. select PINCTRL_SIRF
  368. select USE_OF
  369. help
  370. Support for CSR SiRFprimaII/Marco/Polo platforms
  371. config ARCH_EBSA110
  372. bool "EBSA-110"
  373. select ARCH_USES_GETTIMEOFFSET
  374. select CPU_SA110
  375. select ISA
  376. select NEED_MACH_IO_H
  377. select NEED_MACH_MEMORY_H
  378. select NO_IOPORT
  379. help
  380. This is an evaluation board for the StrongARM processor available
  381. from Digital. It has limited hardware on-board, including an
  382. Ethernet interface, two PCMCIA sockets, two serial ports and a
  383. parallel port.
  384. config ARCH_EP93XX
  385. bool "EP93xx-based"
  386. select ARCH_HAS_HOLES_MEMORYMODEL
  387. select ARCH_REQUIRE_GPIOLIB
  388. select ARCH_USES_GETTIMEOFFSET
  389. select ARM_AMBA
  390. select ARM_VIC
  391. select CLKDEV_LOOKUP
  392. select CPU_ARM920T
  393. select NEED_MACH_MEMORY_H
  394. help
  395. This enables support for the Cirrus EP93xx series of CPUs.
  396. config ARCH_FOOTBRIDGE
  397. bool "FootBridge"
  398. select CPU_SA110
  399. select FOOTBRIDGE
  400. select GENERIC_CLOCKEVENTS
  401. select HAVE_IDE
  402. select NEED_MACH_IO_H if !MMU
  403. select NEED_MACH_MEMORY_H
  404. help
  405. Support for systems based on the DC21285 companion chip
  406. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  407. config ARCH_MXS
  408. bool "Freescale MXS-based"
  409. select ARCH_REQUIRE_GPIOLIB
  410. select CLKDEV_LOOKUP
  411. select CLKSRC_MMIO
  412. select COMMON_CLK
  413. select GENERIC_CLOCKEVENTS
  414. select HAVE_CLK_PREPARE
  415. select MULTI_IRQ_HANDLER
  416. select PINCTRL
  417. select SPARSE_IRQ
  418. select USE_OF
  419. help
  420. Support for Freescale MXS-based family of processors
  421. config ARCH_NETX
  422. bool "Hilscher NetX based"
  423. select ARM_VIC
  424. select CLKSRC_MMIO
  425. select CPU_ARM926T
  426. select GENERIC_CLOCKEVENTS
  427. help
  428. This enables support for systems based on the Hilscher NetX Soc
  429. config ARCH_H720X
  430. bool "Hynix HMS720x-based"
  431. select ARCH_USES_GETTIMEOFFSET
  432. select CPU_ARM720T
  433. select ISA_DMA_API
  434. help
  435. This enables support for systems based on the Hynix HMS720x
  436. config ARCH_IOP13XX
  437. bool "IOP13xx-based"
  438. depends on MMU
  439. select ARCH_SUPPORTS_MSI
  440. select CPU_XSC3
  441. select NEED_MACH_MEMORY_H
  442. select NEED_RET_TO_USER
  443. select PCI
  444. select PLAT_IOP
  445. select VMSPLIT_1G
  446. help
  447. Support for Intel's IOP13XX (XScale) family of processors.
  448. config ARCH_IOP32X
  449. bool "IOP32x-based"
  450. depends on MMU
  451. select ARCH_REQUIRE_GPIOLIB
  452. select CPU_XSCALE
  453. select NEED_MACH_GPIO_H
  454. select NEED_RET_TO_USER
  455. select PCI
  456. select PLAT_IOP
  457. help
  458. Support for Intel's 80219 and IOP32X (XScale) family of
  459. processors.
  460. config ARCH_IOP33X
  461. bool "IOP33x-based"
  462. depends on MMU
  463. select ARCH_REQUIRE_GPIOLIB
  464. select CPU_XSCALE
  465. select NEED_MACH_GPIO_H
  466. select NEED_RET_TO_USER
  467. select PCI
  468. select PLAT_IOP
  469. help
  470. Support for Intel's IOP33X (XScale) family of processors.
  471. config ARCH_IXP4XX
  472. bool "IXP4xx-based"
  473. depends on MMU
  474. select ARCH_HAS_DMA_SET_COHERENT_MASK
  475. select ARCH_REQUIRE_GPIOLIB
  476. select CLKSRC_MMIO
  477. select CPU_XSCALE
  478. select DMABOUNCE if PCI
  479. select GENERIC_CLOCKEVENTS
  480. select MIGHT_HAVE_PCI
  481. select NEED_MACH_IO_H
  482. help
  483. Support for Intel's IXP4XX (XScale) family of processors.
  484. config ARCH_DOVE
  485. bool "Marvell Dove"
  486. select ARCH_REQUIRE_GPIOLIB
  487. select COMMON_CLK_DOVE
  488. select CPU_V7
  489. select GENERIC_CLOCKEVENTS
  490. select MIGHT_HAVE_PCI
  491. select PINCTRL
  492. select PINCTRL_DOVE
  493. select PLAT_ORION_LEGACY
  494. select USB_ARCH_HAS_EHCI
  495. help
  496. Support for the Marvell Dove SoC 88AP510
  497. config ARCH_KIRKWOOD
  498. bool "Marvell Kirkwood"
  499. select ARCH_REQUIRE_GPIOLIB
  500. select CPU_FEROCEON
  501. select GENERIC_CLOCKEVENTS
  502. select PCI
  503. select PCI_QUIRKS
  504. select PINCTRL
  505. select PINCTRL_KIRKWOOD
  506. select PLAT_ORION_LEGACY
  507. help
  508. Support for the following Marvell Kirkwood series SoCs:
  509. 88F6180, 88F6192 and 88F6281.
  510. config ARCH_MV78XX0
  511. bool "Marvell MV78xx0"
  512. select ARCH_REQUIRE_GPIOLIB
  513. select CPU_FEROCEON
  514. select GENERIC_CLOCKEVENTS
  515. select PCI
  516. select PLAT_ORION_LEGACY
  517. help
  518. Support for the following Marvell MV78xx0 series SoCs:
  519. MV781x0, MV782x0.
  520. config ARCH_ORION5X
  521. bool "Marvell Orion"
  522. depends on MMU
  523. select ARCH_REQUIRE_GPIOLIB
  524. select CPU_FEROCEON
  525. select GENERIC_CLOCKEVENTS
  526. select PCI
  527. select PLAT_ORION_LEGACY
  528. help
  529. Support for the following Marvell Orion 5x series SoCs:
  530. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  531. Orion-2 (5281), Orion-1-90 (6183).
  532. config ARCH_MMP
  533. bool "Marvell PXA168/910/MMP2"
  534. depends on MMU
  535. select ARCH_REQUIRE_GPIOLIB
  536. select CLKDEV_LOOKUP
  537. select GENERIC_ALLOCATOR
  538. select GENERIC_CLOCKEVENTS
  539. select GPIO_PXA
  540. select IRQ_DOMAIN
  541. select NEED_MACH_GPIO_H
  542. select PINCTRL
  543. select PLAT_PXA
  544. select SPARSE_IRQ
  545. help
  546. Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
  547. config ARCH_KS8695
  548. bool "Micrel/Kendin KS8695"
  549. select ARCH_REQUIRE_GPIOLIB
  550. select CLKSRC_MMIO
  551. select CPU_ARM922T
  552. select GENERIC_CLOCKEVENTS
  553. select NEED_MACH_MEMORY_H
  554. help
  555. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  556. System-on-Chip devices.
  557. config ARCH_W90X900
  558. bool "Nuvoton W90X900 CPU"
  559. select ARCH_REQUIRE_GPIOLIB
  560. select CLKDEV_LOOKUP
  561. select CLKSRC_MMIO
  562. select CPU_ARM926T
  563. select GENERIC_CLOCKEVENTS
  564. help
  565. Support for Nuvoton (Winbond logic dept.) ARM9 processor,
  566. At present, the w90x900 has been renamed nuc900, regarding
  567. the ARM series product line, you can login the following
  568. link address to know more.
  569. <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
  570. ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
  571. config ARCH_LPC32XX
  572. bool "NXP LPC32XX"
  573. select ARCH_REQUIRE_GPIOLIB
  574. select ARM_AMBA
  575. select CLKDEV_LOOKUP
  576. select CLKSRC_MMIO
  577. select CPU_ARM926T
  578. select GENERIC_CLOCKEVENTS
  579. select HAVE_IDE
  580. select HAVE_PWM
  581. select USB_ARCH_HAS_OHCI
  582. select USE_OF
  583. help
  584. Support for the NXP LPC32XX family of processors
  585. config ARCH_TEGRA
  586. bool "NVIDIA Tegra"
  587. select ARCH_HAS_CPUFREQ
  588. select ARCH_REQUIRE_GPIOLIB
  589. select CLKDEV_LOOKUP
  590. select CLKSRC_MMIO
  591. select CLKSRC_OF
  592. select COMMON_CLK
  593. select GENERIC_CLOCKEVENTS
  594. select HAVE_CLK
  595. select HAVE_SMP
  596. select MIGHT_HAVE_CACHE_L2X0
  597. select SPARSE_IRQ
  598. select USE_OF
  599. help
  600. This enables support for NVIDIA Tegra based systems (Tegra APX,
  601. Tegra 6xx and Tegra 2 series).
  602. config ARCH_PXA
  603. bool "PXA2xx/PXA3xx-based"
  604. depends on MMU
  605. select ARCH_HAS_CPUFREQ
  606. select ARCH_MTD_XIP
  607. select ARCH_REQUIRE_GPIOLIB
  608. select ARM_CPU_SUSPEND if PM
  609. select AUTO_ZRELADDR
  610. select CLKDEV_LOOKUP
  611. select CLKSRC_MMIO
  612. select GENERIC_CLOCKEVENTS
  613. select GPIO_PXA
  614. select HAVE_IDE
  615. select MULTI_IRQ_HANDLER
  616. select NEED_MACH_GPIO_H
  617. select PLAT_PXA
  618. select SPARSE_IRQ
  619. help
  620. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  621. config ARCH_MSM
  622. bool "Qualcomm MSM"
  623. select ARCH_REQUIRE_GPIOLIB
  624. select CLKDEV_LOOKUP
  625. select GENERIC_CLOCKEVENTS
  626. select HAVE_CLK
  627. help
  628. Support for Qualcomm MSM/QSD based systems. This runs on the
  629. apps processor of the MSM/QSD and depends on a shared memory
  630. interface to the modem processor which runs the baseband
  631. stack and controls some vital subsystems
  632. (clock and power control, etc).
  633. config ARCH_SHMOBILE
  634. bool "Renesas SH-Mobile / R-Mobile"
  635. select CLKDEV_LOOKUP
  636. select GENERIC_CLOCKEVENTS
  637. select HAVE_CLK
  638. select HAVE_MACH_CLKDEV
  639. select HAVE_SMP
  640. select MIGHT_HAVE_CACHE_L2X0
  641. select MULTI_IRQ_HANDLER
  642. select NEED_MACH_MEMORY_H
  643. select NO_IOPORT
  644. select PINCTRL
  645. select PM_GENERIC_DOMAINS if PM
  646. select SPARSE_IRQ
  647. help
  648. Support for Renesas's SH-Mobile and R-Mobile ARM platforms.
  649. config ARCH_RPC
  650. bool "RiscPC"
  651. select ARCH_ACORN
  652. select ARCH_MAY_HAVE_PC_FDC
  653. select ARCH_SPARSEMEM_ENABLE
  654. select ARCH_USES_GETTIMEOFFSET
  655. select FIQ
  656. select HAVE_IDE
  657. select HAVE_PATA_PLATFORM
  658. select ISA_DMA_API
  659. select NEED_MACH_IO_H
  660. select NEED_MACH_MEMORY_H
  661. select NO_IOPORT
  662. help
  663. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  664. CD-ROM interface, serial and parallel port, and the floppy drive.
  665. config ARCH_SA1100
  666. bool "SA1100-based"
  667. select ARCH_HAS_CPUFREQ
  668. select ARCH_MTD_XIP
  669. select ARCH_REQUIRE_GPIOLIB
  670. select ARCH_SPARSEMEM_ENABLE
  671. select CLKDEV_LOOKUP
  672. select CLKSRC_MMIO
  673. select CPU_FREQ
  674. select CPU_SA1100
  675. select GENERIC_CLOCKEVENTS
  676. select HAVE_IDE
  677. select ISA
  678. select NEED_MACH_GPIO_H
  679. select NEED_MACH_MEMORY_H
  680. select SPARSE_IRQ
  681. help
  682. Support for StrongARM 11x0 based boards.
  683. config ARCH_S3C24XX
  684. bool "Samsung S3C24XX SoCs"
  685. select ARCH_HAS_CPUFREQ
  686. select ARCH_USES_GETTIMEOFFSET
  687. select CLKDEV_LOOKUP
  688. select HAVE_CLK
  689. select HAVE_S3C2410_I2C if I2C
  690. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  691. select HAVE_S3C_RTC if RTC_CLASS
  692. select NEED_MACH_GPIO_H
  693. select NEED_MACH_IO_H
  694. help
  695. Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443
  696. and S3C2450 SoCs based systems, such as the Simtec Electronics BAST
  697. (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or the
  698. Samsung SMDK2410 development board (and derivatives).
  699. config ARCH_S3C64XX
  700. bool "Samsung S3C64XX"
  701. select ARCH_HAS_CPUFREQ
  702. select ARCH_REQUIRE_GPIOLIB
  703. select ARCH_USES_GETTIMEOFFSET
  704. select ARM_VIC
  705. select CLKDEV_LOOKUP
  706. select CPU_V6
  707. select HAVE_CLK
  708. select HAVE_S3C2410_I2C if I2C
  709. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  710. select HAVE_TCM
  711. select NEED_MACH_GPIO_H
  712. select NO_IOPORT
  713. select PLAT_SAMSUNG
  714. select S3C_DEV_NAND
  715. select S3C_GPIO_TRACK
  716. select SAMSUNG_CLKSRC
  717. select SAMSUNG_GPIOLIB_4BIT
  718. select SAMSUNG_IRQ_VIC_TIMER
  719. select USB_ARCH_HAS_OHCI
  720. help
  721. Samsung S3C64XX series based systems
  722. config ARCH_S5P64X0
  723. bool "Samsung S5P6440 S5P6450"
  724. select CLKDEV_LOOKUP
  725. select CLKSRC_MMIO
  726. select CPU_V6
  727. select GENERIC_CLOCKEVENTS
  728. select HAVE_CLK
  729. select HAVE_S3C2410_I2C if I2C
  730. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  731. select HAVE_S3C_RTC if RTC_CLASS
  732. select NEED_MACH_GPIO_H
  733. help
  734. Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
  735. SMDK6450.
  736. config ARCH_S5PC100
  737. bool "Samsung S5PC100"
  738. select ARCH_USES_GETTIMEOFFSET
  739. select CLKDEV_LOOKUP
  740. select CPU_V7
  741. select HAVE_CLK
  742. select HAVE_S3C2410_I2C if I2C
  743. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  744. select HAVE_S3C_RTC if RTC_CLASS
  745. select NEED_MACH_GPIO_H
  746. help
  747. Samsung S5PC100 series based systems
  748. config ARCH_S5PV210
  749. bool "Samsung S5PV210/S5PC110"
  750. select ARCH_HAS_CPUFREQ
  751. select ARCH_HAS_HOLES_MEMORYMODEL
  752. select ARCH_SPARSEMEM_ENABLE
  753. select CLKDEV_LOOKUP
  754. select CLKSRC_MMIO
  755. select CPU_V7
  756. select GENERIC_CLOCKEVENTS
  757. select HAVE_CLK
  758. select HAVE_S3C2410_I2C if I2C
  759. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  760. select HAVE_S3C_RTC if RTC_CLASS
  761. select NEED_MACH_GPIO_H
  762. select NEED_MACH_MEMORY_H
  763. help
  764. Samsung S5PV210/S5PC110 series based systems
  765. config ARCH_EXYNOS
  766. bool "Samsung EXYNOS"
  767. select ARCH_HAS_CPUFREQ
  768. select ARCH_HAS_HOLES_MEMORYMODEL
  769. select ARCH_SPARSEMEM_ENABLE
  770. select CLKDEV_LOOKUP
  771. select CPU_V7
  772. select GENERIC_CLOCKEVENTS
  773. select HAVE_CLK
  774. select HAVE_S3C2410_I2C if I2C
  775. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  776. select HAVE_S3C_RTC if RTC_CLASS
  777. select NEED_MACH_GPIO_H
  778. select NEED_MACH_MEMORY_H
  779. help
  780. Support for SAMSUNG's EXYNOS SoCs (EXYNOS4/5)
  781. config ARCH_SHARK
  782. bool "Shark"
  783. select ARCH_USES_GETTIMEOFFSET
  784. select CPU_SA110
  785. select ISA
  786. select ISA_DMA
  787. select NEED_MACH_MEMORY_H
  788. select PCI
  789. select ZONE_DMA
  790. help
  791. Support for the StrongARM based Digital DNARD machine, also known
  792. as "Shark" (<http://www.shark-linux.de/shark.html>).
  793. config ARCH_U300
  794. bool "ST-Ericsson U300 Series"
  795. depends on MMU
  796. select ARCH_REQUIRE_GPIOLIB
  797. select ARM_AMBA
  798. select ARM_PATCH_PHYS_VIRT
  799. select ARM_VIC
  800. select CLKDEV_LOOKUP
  801. select CLKSRC_MMIO
  802. select COMMON_CLK
  803. select CPU_ARM926T
  804. select GENERIC_CLOCKEVENTS
  805. select HAVE_TCM
  806. select SPARSE_IRQ
  807. help
  808. Support for ST-Ericsson U300 series mobile platforms.
  809. config ARCH_U8500
  810. bool "ST-Ericsson U8500 Series"
  811. depends on MMU
  812. select ARCH_HAS_CPUFREQ
  813. select ARCH_REQUIRE_GPIOLIB
  814. select ARM_AMBA
  815. select CLKDEV_LOOKUP
  816. select CPU_V7
  817. select GENERIC_CLOCKEVENTS
  818. select HAVE_SMP
  819. select MIGHT_HAVE_CACHE_L2X0
  820. select SPARSE_IRQ
  821. help
  822. Support for ST-Ericsson's Ux500 architecture
  823. config ARCH_NOMADIK
  824. bool "STMicroelectronics Nomadik"
  825. select ARCH_REQUIRE_GPIOLIB
  826. select ARM_AMBA
  827. select ARM_VIC
  828. select CLKSRC_NOMADIK_MTU
  829. select COMMON_CLK
  830. select CPU_ARM926T
  831. select GENERIC_CLOCKEVENTS
  832. select MIGHT_HAVE_CACHE_L2X0
  833. select USE_OF
  834. select PINCTRL
  835. select PINCTRL_STN8815
  836. select SPARSE_IRQ
  837. help
  838. Support for the Nomadik platform by ST-Ericsson
  839. config PLAT_SPEAR
  840. bool "ST SPEAr"
  841. select ARCH_HAS_CPUFREQ
  842. select ARCH_REQUIRE_GPIOLIB
  843. select ARM_AMBA
  844. select CLKDEV_LOOKUP
  845. select CLKSRC_MMIO
  846. select COMMON_CLK
  847. select GENERIC_CLOCKEVENTS
  848. select HAVE_CLK
  849. help
  850. Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
  851. config ARCH_DAVINCI
  852. bool "TI DaVinci"
  853. select ARCH_HAS_HOLES_MEMORYMODEL
  854. select ARCH_REQUIRE_GPIOLIB
  855. select CLKDEV_LOOKUP
  856. select GENERIC_ALLOCATOR
  857. select GENERIC_CLOCKEVENTS
  858. select GENERIC_IRQ_CHIP
  859. select HAVE_IDE
  860. select NEED_MACH_GPIO_H
  861. select USE_OF
  862. select ZONE_DMA
  863. help
  864. Support for TI's DaVinci platform.
  865. config ARCH_OMAP1
  866. bool "TI OMAP1"
  867. depends on MMU
  868. select ARCH_HAS_CPUFREQ
  869. select ARCH_HAS_HOLES_MEMORYMODEL
  870. select ARCH_OMAP
  871. select ARCH_REQUIRE_GPIOLIB
  872. select CLKDEV_LOOKUP
  873. select CLKSRC_MMIO
  874. select GENERIC_CLOCKEVENTS
  875. select GENERIC_IRQ_CHIP
  876. select HAVE_CLK
  877. select HAVE_IDE
  878. select IRQ_DOMAIN
  879. select NEED_MACH_IO_H if PCCARD
  880. select NEED_MACH_MEMORY_H
  881. help
  882. Support for older TI OMAP1 (omap7xx, omap15xx or omap16xx)
  883. endchoice
  884. menu "Multiple platform selection"
  885. depends on ARCH_MULTIPLATFORM
  886. comment "CPU Core family selection"
  887. config ARCH_MULTI_V4
  888. bool "ARMv4 based platforms (FA526, StrongARM)"
  889. depends on !ARCH_MULTI_V6_V7
  890. select ARCH_MULTI_V4_V5
  891. config ARCH_MULTI_V4T
  892. bool "ARMv4T based platforms (ARM720T, ARM920T, ...)"
  893. depends on !ARCH_MULTI_V6_V7
  894. select ARCH_MULTI_V4_V5
  895. config ARCH_MULTI_V5
  896. bool "ARMv5 based platforms (ARM926T, XSCALE, PJ1, ...)"
  897. depends on !ARCH_MULTI_V6_V7
  898. select ARCH_MULTI_V4_V5
  899. config ARCH_MULTI_V4_V5
  900. bool
  901. config ARCH_MULTI_V6
  902. bool "ARMv6 based platforms (ARM11, Scorpion, ...)"
  903. select ARCH_MULTI_V6_V7
  904. select CPU_V6
  905. config ARCH_MULTI_V7
  906. bool "ARMv7 based platforms (Cortex-A, PJ4, Krait)"
  907. default y
  908. select ARCH_MULTI_V6_V7
  909. select ARCH_VEXPRESS
  910. select CPU_V7
  911. config ARCH_MULTI_V6_V7
  912. bool
  913. config ARCH_MULTI_CPU_AUTO
  914. def_bool !(ARCH_MULTI_V4 || ARCH_MULTI_V4T || ARCH_MULTI_V6_V7)
  915. select ARCH_MULTI_V5
  916. endmenu
  917. #
  918. # This is sorted alphabetically by mach-* pathname. However, plat-*
  919. # Kconfigs may be included either alphabetically (according to the
  920. # plat- suffix) or along side the corresponding mach-* source.
  921. #
  922. source "arch/arm/mach-mvebu/Kconfig"
  923. source "arch/arm/mach-at91/Kconfig"
  924. source "arch/arm/mach-bcm/Kconfig"
  925. source "arch/arm/mach-clps711x/Kconfig"
  926. source "arch/arm/mach-cns3xxx/Kconfig"
  927. source "arch/arm/mach-davinci/Kconfig"
  928. source "arch/arm/mach-dove/Kconfig"
  929. source "arch/arm/mach-ep93xx/Kconfig"
  930. source "arch/arm/mach-footbridge/Kconfig"
  931. source "arch/arm/mach-gemini/Kconfig"
  932. source "arch/arm/mach-h720x/Kconfig"
  933. source "arch/arm/mach-highbank/Kconfig"
  934. source "arch/arm/mach-integrator/Kconfig"
  935. source "arch/arm/mach-iop32x/Kconfig"
  936. source "arch/arm/mach-iop33x/Kconfig"
  937. source "arch/arm/mach-iop13xx/Kconfig"
  938. source "arch/arm/mach-ixp4xx/Kconfig"
  939. source "arch/arm/mach-kirkwood/Kconfig"
  940. source "arch/arm/mach-ks8695/Kconfig"
  941. source "arch/arm/mach-msm/Kconfig"
  942. source "arch/arm/mach-mv78xx0/Kconfig"
  943. source "arch/arm/mach-imx/Kconfig"
  944. source "arch/arm/mach-mxs/Kconfig"
  945. source "arch/arm/mach-netx/Kconfig"
  946. source "arch/arm/mach-nomadik/Kconfig"
  947. source "arch/arm/plat-omap/Kconfig"
  948. source "arch/arm/mach-omap1/Kconfig"
  949. source "arch/arm/mach-omap2/Kconfig"
  950. source "arch/arm/mach-orion5x/Kconfig"
  951. source "arch/arm/mach-picoxcell/Kconfig"
  952. source "arch/arm/mach-pxa/Kconfig"
  953. source "arch/arm/plat-pxa/Kconfig"
  954. source "arch/arm/mach-mmp/Kconfig"
  955. source "arch/arm/mach-realview/Kconfig"
  956. source "arch/arm/mach-sa1100/Kconfig"
  957. source "arch/arm/plat-samsung/Kconfig"
  958. source "arch/arm/mach-socfpga/Kconfig"
  959. source "arch/arm/plat-spear/Kconfig"
  960. source "arch/arm/mach-s3c24xx/Kconfig"
  961. if ARCH_S3C64XX
  962. source "arch/arm/mach-s3c64xx/Kconfig"
  963. endif
  964. source "arch/arm/mach-s5p64x0/Kconfig"
  965. source "arch/arm/mach-s5pc100/Kconfig"
  966. source "arch/arm/mach-s5pv210/Kconfig"
  967. source "arch/arm/mach-exynos/Kconfig"
  968. source "arch/arm/mach-shmobile/Kconfig"
  969. source "arch/arm/mach-sunxi/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-virt/Kconfig"
  978. source "arch/arm/mach-vt8500/Kconfig"
  979. source "arch/arm/mach-w90x900/Kconfig"
  980. source "arch/arm/mach-zynq/Kconfig"
  981. # Definitions to make life easier
  982. config ARCH_ACORN
  983. bool
  984. config PLAT_IOP
  985. bool
  986. select GENERIC_CLOCKEVENTS
  987. config PLAT_ORION
  988. bool
  989. select CLKSRC_MMIO
  990. select COMMON_CLK
  991. select GENERIC_IRQ_CHIP
  992. select IRQ_DOMAIN
  993. config PLAT_ORION_LEGACY
  994. bool
  995. select PLAT_ORION
  996. config PLAT_PXA
  997. bool
  998. config PLAT_VERSATILE
  999. bool
  1000. config ARM_TIMER_SP804
  1001. bool
  1002. select CLKSRC_MMIO
  1003. select HAVE_SCHED_CLOCK
  1004. source arch/arm/mm/Kconfig
  1005. config ARM_NR_BANKS
  1006. int
  1007. default 16 if ARCH_EP93XX
  1008. default 8
  1009. config IWMMXT
  1010. bool "Enable iWMMXt support"
  1011. depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
  1012. default y if PXA27x || PXA3xx || ARCH_MMP
  1013. help
  1014. Enable support for iWMMXt context switching at run time if
  1015. running on a CPU that supports it.
  1016. config XSCALE_PMU
  1017. bool
  1018. depends on CPU_XSCALE
  1019. default y
  1020. config MULTI_IRQ_HANDLER
  1021. bool
  1022. help
  1023. Allow each machine to specify it's own IRQ handler at run time.
  1024. if !MMU
  1025. source "arch/arm/Kconfig-nommu"
  1026. endif
  1027. config ARM_ERRATA_326103
  1028. bool "ARM errata: FSR write bit incorrect on a SWP to read-only memory"
  1029. depends on CPU_V6
  1030. help
  1031. Executing a SWP instruction to read-only memory does not set bit 11
  1032. of the FSR on the ARM 1136 prior to r1p0. This causes the kernel to
  1033. treat the access as a read, preventing a COW from occurring and
  1034. causing the faulting task to livelock.
  1035. config ARM_ERRATA_411920
  1036. bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
  1037. depends on CPU_V6 || CPU_V6K
  1038. help
  1039. Invalidation of the Instruction Cache operation can
  1040. fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
  1041. It does not affect the MPCore. This option enables the ARM Ltd.
  1042. recommended workaround.
  1043. config ARM_ERRATA_430973
  1044. bool "ARM errata: Stale prediction on replaced interworking branch"
  1045. depends on CPU_V7
  1046. help
  1047. This option enables the workaround for the 430973 Cortex-A8
  1048. (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
  1049. interworking branch is replaced with another code sequence at the
  1050. same virtual address, whether due to self-modifying code or virtual
  1051. to physical address re-mapping, Cortex-A8 does not recover from the
  1052. stale interworking branch prediction. This results in Cortex-A8
  1053. executing the new code sequence in the incorrect ARM or Thumb state.
  1054. The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
  1055. and also flushes the branch target cache at every context switch.
  1056. Note that setting specific bits in the ACTLR register may not be
  1057. available in non-secure mode.
  1058. config ARM_ERRATA_458693
  1059. bool "ARM errata: Processor deadlock when a false hazard is created"
  1060. depends on CPU_V7
  1061. depends on !ARCH_MULTIPLATFORM
  1062. help
  1063. This option enables the workaround for the 458693 Cortex-A8 (r2p0)
  1064. erratum. For very specific sequences of memory operations, it is
  1065. possible for a hazard condition intended for a cache line to instead
  1066. be incorrectly associated with a different cache line. This false
  1067. hazard might then cause a processor deadlock. The workaround enables
  1068. the L1 caching of the NEON accesses and disables the PLD instruction
  1069. in the ACTLR register. Note that setting specific bits in the ACTLR
  1070. register may not be available in non-secure mode.
  1071. config ARM_ERRATA_460075
  1072. bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
  1073. depends on CPU_V7
  1074. depends on !ARCH_MULTIPLATFORM
  1075. help
  1076. This option enables the workaround for the 460075 Cortex-A8 (r2p0)
  1077. erratum. Any asynchronous access to the L2 cache may encounter a
  1078. situation in which recent store transactions to the L2 cache are lost
  1079. and overwritten with stale memory contents from external memory. The
  1080. workaround disables the write-allocate mode for the L2 cache via the
  1081. ACTLR register. Note that setting specific bits in the ACTLR register
  1082. may not be available in non-secure mode.
  1083. config ARM_ERRATA_742230
  1084. bool "ARM errata: DMB operation may be faulty"
  1085. depends on CPU_V7 && SMP
  1086. depends on !ARCH_MULTIPLATFORM
  1087. help
  1088. This option enables the workaround for the 742230 Cortex-A9
  1089. (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
  1090. between two write operations may not ensure the correct visibility
  1091. ordering of the two writes. This workaround sets a specific bit in
  1092. the diagnostic register of the Cortex-A9 which causes the DMB
  1093. instruction to behave as a DSB, ensuring the correct behaviour of
  1094. the two writes.
  1095. config ARM_ERRATA_742231
  1096. bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
  1097. depends on CPU_V7 && SMP
  1098. depends on !ARCH_MULTIPLATFORM
  1099. help
  1100. This option enables the workaround for the 742231 Cortex-A9
  1101. (r2p0..r2p2) erratum. Under certain conditions, specific to the
  1102. Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
  1103. accessing some data located in the same cache line, may get corrupted
  1104. data due to bad handling of the address hazard when the line gets
  1105. replaced from one of the CPUs at the same time as another CPU is
  1106. accessing it. This workaround sets specific bits in the diagnostic
  1107. register of the Cortex-A9 which reduces the linefill issuing
  1108. capabilities of the processor.
  1109. config PL310_ERRATA_588369
  1110. bool "PL310 errata: Clean & Invalidate maintenance operations do not invalidate clean lines"
  1111. depends on CACHE_L2X0
  1112. help
  1113. The PL310 L2 cache controller implements three types of Clean &
  1114. Invalidate maintenance operations: by Physical Address
  1115. (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
  1116. They are architecturally defined to behave as the execution of a
  1117. clean operation followed immediately by an invalidate operation,
  1118. both performing to the same memory location. This functionality
  1119. is not correctly implemented in PL310 as clean lines are not
  1120. invalidated as a result of these operations.
  1121. config ARM_ERRATA_720789
  1122. bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
  1123. depends on CPU_V7
  1124. help
  1125. This option enables the workaround for the 720789 Cortex-A9 (prior to
  1126. r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
  1127. broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
  1128. As a consequence of this erratum, some TLB entries which should be
  1129. invalidated are not, resulting in an incoherency in the system page
  1130. tables. The workaround changes the TLB flushing routines to invalidate
  1131. entries regardless of the ASID.
  1132. config PL310_ERRATA_727915
  1133. bool "PL310 errata: Background Clean & Invalidate by Way operation can cause data corruption"
  1134. depends on CACHE_L2X0
  1135. help
  1136. PL310 implements the Clean & Invalidate by Way L2 cache maintenance
  1137. operation (offset 0x7FC). This operation runs in background so that
  1138. PL310 can handle normal accesses while it is in progress. Under very
  1139. rare circumstances, due to this erratum, write data can be lost when
  1140. PL310 treats a cacheable write transaction during a Clean &
  1141. Invalidate by Way operation.
  1142. config ARM_ERRATA_743622
  1143. bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
  1144. depends on CPU_V7
  1145. depends on !ARCH_MULTIPLATFORM
  1146. help
  1147. This option enables the workaround for the 743622 Cortex-A9
  1148. (r2p*) erratum. Under very rare conditions, a faulty
  1149. optimisation in the Cortex-A9 Store Buffer may lead to data
  1150. corruption. This workaround sets a specific bit in the diagnostic
  1151. register of the Cortex-A9 which disables the Store Buffer
  1152. optimisation, preventing the defect from occurring. This has no
  1153. visible impact on the overall performance or power consumption of the
  1154. processor.
  1155. config ARM_ERRATA_751472
  1156. bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
  1157. depends on CPU_V7
  1158. depends on !ARCH_MULTIPLATFORM
  1159. help
  1160. This option enables the workaround for the 751472 Cortex-A9 (prior
  1161. to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
  1162. completion of a following broadcasted operation if the second
  1163. operation is received by a CPU before the ICIALLUIS has completed,
  1164. potentially leading to corrupted entries in the cache or TLB.
  1165. config PL310_ERRATA_753970
  1166. bool "PL310 errata: cache sync operation may be faulty"
  1167. depends on CACHE_PL310
  1168. help
  1169. This option enables the workaround for the 753970 PL310 (r3p0) erratum.
  1170. Under some condition the effect of cache sync operation on
  1171. the store buffer still remains when the operation completes.
  1172. This means that the store buffer is always asked to drain and
  1173. this prevents it from merging any further writes. The workaround
  1174. is to replace the normal offset of cache sync operation (0x730)
  1175. by another offset targeting an unmapped PL310 register 0x740.
  1176. This has the same effect as the cache sync operation: store buffer
  1177. drain and waiting for all buffers empty.
  1178. config ARM_ERRATA_754322
  1179. bool "ARM errata: possible faulty MMU translations following an ASID switch"
  1180. depends on CPU_V7
  1181. help
  1182. This option enables the workaround for the 754322 Cortex-A9 (r2p*,
  1183. r3p*) erratum. A speculative memory access may cause a page table walk
  1184. which starts prior to an ASID switch but completes afterwards. This
  1185. can populate the micro-TLB with a stale entry which may be hit with
  1186. the new ASID. This workaround places two dsb instructions in the mm
  1187. switching code so that no page table walks can cross the ASID switch.
  1188. config ARM_ERRATA_754327
  1189. bool "ARM errata: no automatic Store Buffer drain"
  1190. depends on CPU_V7 && SMP
  1191. help
  1192. This option enables the workaround for the 754327 Cortex-A9 (prior to
  1193. r2p0) erratum. The Store Buffer does not have any automatic draining
  1194. mechanism and therefore a livelock may occur if an external agent
  1195. continuously polls a memory location waiting to observe an update.
  1196. This workaround defines cpu_relax() as smp_mb(), preventing correctly
  1197. written polling loops from denying visibility of updates to memory.
  1198. config ARM_ERRATA_364296
  1199. bool "ARM errata: Possible cache data corruption with hit-under-miss enabled"
  1200. depends on CPU_V6 && !SMP
  1201. help
  1202. This options enables the workaround for the 364296 ARM1136
  1203. r0p2 erratum (possible cache data corruption with
  1204. hit-under-miss enabled). It sets the undocumented bit 31 in
  1205. the auxiliary control register and the FI bit in the control
  1206. register, thus disabling hit-under-miss without putting the
  1207. processor into full low interrupt latency mode. ARM11MPCore
  1208. is not affected.
  1209. config ARM_ERRATA_764369
  1210. bool "ARM errata: Data cache line maintenance operation by MVA may not succeed"
  1211. depends on CPU_V7 && SMP
  1212. help
  1213. This option enables the workaround for erratum 764369
  1214. affecting Cortex-A9 MPCore with two or more processors (all
  1215. current revisions). Under certain timing circumstances, a data
  1216. cache line maintenance operation by MVA targeting an Inner
  1217. Shareable memory region may fail to proceed up to either the
  1218. Point of Coherency or to the Point of Unification of the
  1219. system. This workaround adds a DSB instruction before the
  1220. relevant cache maintenance functions and sets a specific bit
  1221. in the diagnostic control register of the SCU.
  1222. config PL310_ERRATA_769419
  1223. bool "PL310 errata: no automatic Store Buffer drain"
  1224. depends on CACHE_L2X0
  1225. help
  1226. On revisions of the PL310 prior to r3p2, the Store Buffer does
  1227. not automatically drain. This can cause normal, non-cacheable
  1228. writes to be retained when the memory system is idle, leading
  1229. to suboptimal I/O performance for drivers using coherent DMA.
  1230. This option adds a write barrier to the cpu_idle loop so that,
  1231. on systems with an outer cache, the store buffer is drained
  1232. explicitly.
  1233. config ARM_ERRATA_775420
  1234. bool "ARM errata: A data cache maintenance operation which aborts, might lead to deadlock"
  1235. depends on CPU_V7
  1236. help
  1237. This option enables the workaround for the 775420 Cortex-A9 (r2p2,
  1238. r2p6,r2p8,r2p10,r3p0) erratum. In case a date cache maintenance
  1239. operation aborts with MMU exception, it might cause the processor
  1240. to deadlock. This workaround puts DSB before executing ISB if
  1241. an abort may occur on cache maintenance.
  1242. endmenu
  1243. source "arch/arm/common/Kconfig"
  1244. menu "Bus support"
  1245. config ARM_AMBA
  1246. bool
  1247. config ISA
  1248. bool
  1249. help
  1250. Find out whether you have ISA slots on your motherboard. ISA is the
  1251. name of a bus system, i.e. the way the CPU talks to the other stuff
  1252. inside your box. Other bus systems are PCI, EISA, MicroChannel
  1253. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  1254. newer boards don't support it. If you have ISA, say Y, otherwise N.
  1255. # Select ISA DMA controller support
  1256. config ISA_DMA
  1257. bool
  1258. select ISA_DMA_API
  1259. config ARCH_NO_VIRT_TO_BUS
  1260. def_bool y
  1261. depends on !ARCH_RPC && !ARCH_NETWINDER && !ARCH_SHARK
  1262. # Select ISA DMA interface
  1263. config ISA_DMA_API
  1264. bool
  1265. config PCI
  1266. bool "PCI support" if MIGHT_HAVE_PCI
  1267. help
  1268. Find out whether you have a PCI motherboard. PCI is the name of a
  1269. bus system, i.e. the way the CPU talks to the other stuff inside
  1270. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  1271. VESA. If you have PCI, say Y, otherwise N.
  1272. config PCI_DOMAINS
  1273. bool
  1274. depends on PCI
  1275. config PCI_NANOENGINE
  1276. bool "BSE nanoEngine PCI support"
  1277. depends on SA1100_NANOENGINE
  1278. help
  1279. Enable PCI on the BSE nanoEngine board.
  1280. config PCI_SYSCALL
  1281. def_bool PCI
  1282. # Select the host bridge type
  1283. config PCI_HOST_VIA82C505
  1284. bool
  1285. depends on PCI && ARCH_SHARK
  1286. default y
  1287. config PCI_HOST_ITE8152
  1288. bool
  1289. depends on PCI && MACH_ARMCORE
  1290. default y
  1291. select DMABOUNCE
  1292. source "drivers/pci/Kconfig"
  1293. source "drivers/pcmcia/Kconfig"
  1294. endmenu
  1295. menu "Kernel Features"
  1296. config HAVE_SMP
  1297. bool
  1298. help
  1299. This option should be selected by machines which have an SMP-
  1300. capable CPU.
  1301. The only effect of this option is to make the SMP-related
  1302. options available to the user for configuration.
  1303. config SMP
  1304. bool "Symmetric Multi-Processing"
  1305. depends on CPU_V6K || CPU_V7
  1306. depends on GENERIC_CLOCKEVENTS
  1307. depends on HAVE_SMP
  1308. depends on MMU
  1309. select HAVE_ARM_SCU if !ARCH_MSM_SCORPIONMP
  1310. select USE_GENERIC_SMP_HELPERS
  1311. help
  1312. This enables support for systems with more than one CPU. If you have
  1313. a system with only one CPU, like most personal computers, say N. If
  1314. you have a system with more than one CPU, say Y.
  1315. If you say N here, the kernel will run on single and multiprocessor
  1316. machines, but will use only one CPU of a multiprocessor machine. If
  1317. you say Y here, the kernel will run on many, but not all, single
  1318. processor machines. On a single processor machine, the kernel will
  1319. run faster if you say N here.
  1320. See also <file:Documentation/x86/i386/IO-APIC.txt>,
  1321. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  1322. <http://tldp.org/HOWTO/SMP-HOWTO.html>.
  1323. If you don't know what to do here, say N.
  1324. config SMP_ON_UP
  1325. bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
  1326. depends on SMP && !XIP_KERNEL
  1327. default y
  1328. help
  1329. SMP kernels contain instructions which fail on non-SMP processors.
  1330. Enabling this option allows the kernel to modify itself to make
  1331. these instructions safe. Disabling it allows about 1K of space
  1332. savings.
  1333. If you don't know what to do here, say Y.
  1334. config ARM_CPU_TOPOLOGY
  1335. bool "Support cpu topology definition"
  1336. depends on SMP && CPU_V7
  1337. default y
  1338. help
  1339. Support ARM cpu topology definition. The MPIDR register defines
  1340. affinity between processors which is then used to describe the cpu
  1341. topology of an ARM System.
  1342. config SCHED_MC
  1343. bool "Multi-core scheduler support"
  1344. depends on ARM_CPU_TOPOLOGY
  1345. help
  1346. Multi-core scheduler support improves the CPU scheduler's decision
  1347. making when dealing with multi-core CPU chips at a cost of slightly
  1348. increased overhead in some places. If unsure say N here.
  1349. config SCHED_SMT
  1350. bool "SMT scheduler support"
  1351. depends on ARM_CPU_TOPOLOGY
  1352. help
  1353. Improves the CPU scheduler's decision making when dealing with
  1354. MultiThreading at a cost of slightly increased overhead in some
  1355. places. If unsure say N here.
  1356. config HAVE_ARM_SCU
  1357. bool
  1358. help
  1359. This option enables support for the ARM system coherency unit
  1360. config HAVE_ARM_ARCH_TIMER
  1361. bool "Architected timer support"
  1362. depends on CPU_V7
  1363. select ARM_ARCH_TIMER
  1364. help
  1365. This option enables support for the ARM architected timer
  1366. config HAVE_ARM_TWD
  1367. bool
  1368. depends on SMP
  1369. help
  1370. This options enables support for the ARM timer and watchdog unit
  1371. choice
  1372. prompt "Memory split"
  1373. default VMSPLIT_3G
  1374. help
  1375. Select the desired split between kernel and user memory.
  1376. If you are not absolutely sure what you are doing, leave this
  1377. option alone!
  1378. config VMSPLIT_3G
  1379. bool "3G/1G user/kernel split"
  1380. config VMSPLIT_2G
  1381. bool "2G/2G user/kernel split"
  1382. config VMSPLIT_1G
  1383. bool "1G/3G user/kernel split"
  1384. endchoice
  1385. config PAGE_OFFSET
  1386. hex
  1387. default 0x40000000 if VMSPLIT_1G
  1388. default 0x80000000 if VMSPLIT_2G
  1389. default 0xC0000000
  1390. config NR_CPUS
  1391. int "Maximum number of CPUs (2-32)"
  1392. range 2 32
  1393. depends on SMP
  1394. default "4"
  1395. config HOTPLUG_CPU
  1396. bool "Support for hot-pluggable CPUs"
  1397. depends on SMP && HOTPLUG
  1398. help
  1399. Say Y here to experiment with turning CPUs off and on. CPUs
  1400. can be controlled through /sys/devices/system/cpu.
  1401. config ARM_PSCI
  1402. bool "Support for the ARM Power State Coordination Interface (PSCI)"
  1403. depends on CPU_V7
  1404. help
  1405. Say Y here if you want Linux to communicate with system firmware
  1406. implementing the PSCI specification for CPU-centric power
  1407. management operations described in ARM document number ARM DEN
  1408. 0022A ("Power State Coordination Interface System Software on
  1409. ARM processors").
  1410. config LOCAL_TIMERS
  1411. bool "Use local timer interrupts"
  1412. depends on SMP
  1413. default y
  1414. select HAVE_ARM_TWD if (!ARCH_MSM_SCORPIONMP && !EXYNOS4_MCT)
  1415. help
  1416. Enable support for local timers on SMP platforms, rather then the
  1417. legacy IPI broadcast method. Local timers allows the system
  1418. accounting to be spread across the timer interval, preventing a
  1419. "thundering herd" at every timer tick.
  1420. config ARCH_NR_GPIO
  1421. int
  1422. default 1024 if ARCH_SHMOBILE || ARCH_TEGRA
  1423. default 355 if ARCH_U8500
  1424. default 264 if MACH_H4700
  1425. default 512 if SOC_OMAP5
  1426. default 288 if ARCH_VT8500 || ARCH_SUNXI
  1427. default 0
  1428. help
  1429. Maximum number of GPIOs in the system.
  1430. If unsure, leave the default value.
  1431. source kernel/Kconfig.preempt
  1432. config HZ
  1433. int
  1434. default 200 if ARCH_EBSA110 || ARCH_S3C24XX || ARCH_S5P64X0 || \
  1435. ARCH_S5PV210 || ARCH_EXYNOS4
  1436. default AT91_TIMER_HZ if ARCH_AT91
  1437. default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
  1438. default 100
  1439. config SCHED_HRTICK
  1440. def_bool HIGH_RES_TIMERS
  1441. config THUMB2_KERNEL
  1442. bool "Compile the kernel in Thumb-2 mode"
  1443. depends on CPU_V7 && !CPU_V6 && !CPU_V6K
  1444. select AEABI
  1445. select ARM_ASM_UNIFIED
  1446. select ARM_UNWIND
  1447. help
  1448. By enabling this option, the kernel will be compiled in
  1449. Thumb-2 mode. A compiler/assembler that understand the unified
  1450. ARM-Thumb syntax is needed.
  1451. If unsure, say N.
  1452. config THUMB2_AVOID_R_ARM_THM_JUMP11
  1453. bool "Work around buggy Thumb-2 short branch relocations in gas"
  1454. depends on THUMB2_KERNEL && MODULES
  1455. default y
  1456. help
  1457. Various binutils versions can resolve Thumb-2 branches to
  1458. locally-defined, preemptible global symbols as short-range "b.n"
  1459. branch instructions.
  1460. This is a problem, because there's no guarantee the final
  1461. destination of the symbol, or any candidate locations for a
  1462. trampoline, are within range of the branch. For this reason, the
  1463. kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
  1464. relocation in modules at all, and it makes little sense to add
  1465. support.
  1466. The symptom is that the kernel fails with an "unsupported
  1467. relocation" error when loading some modules.
  1468. Until fixed tools are available, passing
  1469. -fno-optimize-sibling-calls to gcc should prevent gcc generating
  1470. code which hits this problem, at the cost of a bit of extra runtime
  1471. stack usage in some cases.
  1472. The problem is described in more detail at:
  1473. https://bugs.launchpad.net/binutils-linaro/+bug/725126
  1474. Only Thumb-2 kernels are affected.
  1475. Unless you are sure your tools don't have this problem, say Y.
  1476. config ARM_ASM_UNIFIED
  1477. bool
  1478. config AEABI
  1479. bool "Use the ARM EABI to compile the kernel"
  1480. help
  1481. This option allows for the kernel to be compiled using the latest
  1482. ARM ABI (aka EABI). This is only useful if you are using a user
  1483. space environment that is also compiled with EABI.
  1484. Since there are major incompatibilities between the legacy ABI and
  1485. EABI, especially with regard to structure member alignment, this
  1486. option also changes the kernel syscall calling convention to
  1487. disambiguate both ABIs and allow for backward compatibility support
  1488. (selected with CONFIG_OABI_COMPAT).
  1489. To use this you need GCC version 4.0.0 or later.
  1490. config OABI_COMPAT
  1491. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  1492. depends on AEABI && !THUMB2_KERNEL
  1493. default y
  1494. help
  1495. This option preserves the old syscall interface along with the
  1496. new (ARM EABI) one. It also provides a compatibility layer to
  1497. intercept syscalls that have structure arguments which layout
  1498. in memory differs between the legacy ABI and the new ARM EABI
  1499. (only for non "thumb" binaries). This option adds a tiny
  1500. overhead to all syscalls and produces a slightly larger kernel.
  1501. If you know you'll be using only pure EABI user space then you
  1502. can say N here. If this option is not selected and you attempt
  1503. to execute a legacy ABI binary then the result will be
  1504. UNPREDICTABLE (in fact it can be predicted that it won't work
  1505. at all). If in doubt say Y.
  1506. config ARCH_HAS_HOLES_MEMORYMODEL
  1507. bool
  1508. config ARCH_SPARSEMEM_ENABLE
  1509. bool
  1510. config ARCH_SPARSEMEM_DEFAULT
  1511. def_bool ARCH_SPARSEMEM_ENABLE
  1512. config ARCH_SELECT_MEMORY_MODEL
  1513. def_bool ARCH_SPARSEMEM_ENABLE
  1514. config HAVE_ARCH_PFN_VALID
  1515. def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
  1516. config HIGHMEM
  1517. bool "High Memory Support"
  1518. depends on MMU
  1519. help
  1520. The address space of ARM processors is only 4 Gigabytes large
  1521. and it has to accommodate user address space, kernel address
  1522. space as well as some memory mapped IO. That means that, if you
  1523. have a large amount of physical memory and/or IO, not all of the
  1524. memory can be "permanently mapped" by the kernel. The physical
  1525. memory that is not permanently mapped is called "high memory".
  1526. Depending on the selected kernel/user memory split, minimum
  1527. vmalloc space and actual amount of RAM, you may not need this
  1528. option which should result in a slightly faster kernel.
  1529. If unsure, say n.
  1530. config HIGHPTE
  1531. bool "Allocate 2nd-level pagetables from highmem"
  1532. depends on HIGHMEM
  1533. config HW_PERF_EVENTS
  1534. bool "Enable hardware performance counter support for perf events"
  1535. depends on PERF_EVENTS
  1536. default y
  1537. help
  1538. Enable hardware performance counter support for perf events. If
  1539. disabled, perf events will use software events only.
  1540. source "mm/Kconfig"
  1541. config FORCE_MAX_ZONEORDER
  1542. int "Maximum zone order" if ARCH_SHMOBILE
  1543. range 11 64 if ARCH_SHMOBILE
  1544. default "12" if SOC_AM33XX
  1545. default "9" if SA1111
  1546. default "11"
  1547. help
  1548. The kernel memory allocator divides physically contiguous memory
  1549. blocks into "zones", where each zone is a power of two number of
  1550. pages. This option selects the largest power of two that the kernel
  1551. keeps in the memory allocator. If you need to allocate very large
  1552. blocks of physically contiguous memory, then you may need to
  1553. increase this value.
  1554. This config option is actually maximum order plus one. For example,
  1555. a value of 11 means that the largest free memory block is 2^10 pages.
  1556. config ALIGNMENT_TRAP
  1557. bool
  1558. depends on CPU_CP15_MMU
  1559. default y if !ARCH_EBSA110
  1560. select HAVE_PROC_CPU if PROC_FS
  1561. help
  1562. ARM processors cannot fetch/store information which is not
  1563. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  1564. address divisible by 4. On 32-bit ARM processors, these non-aligned
  1565. fetch/store instructions will be emulated in software if you say
  1566. here, which has a severe performance impact. This is necessary for
  1567. correct operation of some network protocols. With an IP-only
  1568. configuration it is safe to say N, otherwise say Y.
  1569. config UACCESS_WITH_MEMCPY
  1570. bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user()"
  1571. depends on MMU
  1572. default y if CPU_FEROCEON
  1573. help
  1574. Implement faster copy_to_user and clear_user methods for CPU
  1575. cores where a 8-word STM instruction give significantly higher
  1576. memory write throughput than a sequence of individual 32bit stores.
  1577. A possible side effect is a slight increase in scheduling latency
  1578. between threads sharing the same address space if they invoke
  1579. such copy operations with large buffers.
  1580. However, if the CPU data cache is using a write-allocate mode,
  1581. this option is unlikely to provide any performance gain.
  1582. config SECCOMP
  1583. bool
  1584. prompt "Enable seccomp to safely compute untrusted bytecode"
  1585. ---help---
  1586. This kernel feature is useful for number crunching applications
  1587. that may need to compute untrusted bytecode during their
  1588. execution. By using pipes or other transports made available to
  1589. the process as file descriptors supporting the read/write
  1590. syscalls, it's possible to isolate those applications in
  1591. their own address space using seccomp. Once seccomp is
  1592. enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
  1593. and the task is only allowed to execute a few safe syscalls
  1594. defined by each seccomp mode.
  1595. config CC_STACKPROTECTOR
  1596. bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
  1597. help
  1598. This option turns on the -fstack-protector GCC feature. This
  1599. feature puts, at the beginning of functions, a canary value on
  1600. the stack just before the return address, and validates
  1601. the value just before actually returning. Stack based buffer
  1602. overflows (that need to overwrite this return address) now also
  1603. overwrite the canary, which gets detected and the attack is then
  1604. neutralized via a kernel panic.
  1605. This feature requires gcc version 4.2 or above.
  1606. config XEN_DOM0
  1607. def_bool y
  1608. depends on XEN
  1609. config XEN
  1610. bool "Xen guest support on ARM (EXPERIMENTAL)"
  1611. depends on ARM && OF
  1612. depends on CPU_V7 && !CPU_V6
  1613. help
  1614. Say Y if you want to run Linux in a Virtual Machine on Xen on ARM.
  1615. endmenu
  1616. menu "Boot options"
  1617. config USE_OF
  1618. bool "Flattened Device Tree support"
  1619. select IRQ_DOMAIN
  1620. select OF
  1621. select OF_EARLY_FLATTREE
  1622. help
  1623. Include support for flattened device tree machine descriptions.
  1624. config ATAGS
  1625. bool "Support for the traditional ATAGS boot data passing" if USE_OF
  1626. default y
  1627. help
  1628. This is the traditional way of passing data to the kernel at boot
  1629. time. If you are solely relying on the flattened device tree (or
  1630. the ARM_ATAG_DTB_COMPAT option) then you may unselect this option
  1631. to remove ATAGS support from your kernel binary. If unsure,
  1632. leave this to y.
  1633. config DEPRECATED_PARAM_STRUCT
  1634. bool "Provide old way to pass kernel parameters"
  1635. depends on ATAGS
  1636. help
  1637. This was deprecated in 2001 and announced to live on for 5 years.
  1638. Some old boot loaders still use this way.
  1639. # Compressed boot loader in ROM. Yes, we really want to ask about
  1640. # TEXT and BSS so we preserve their values in the config files.
  1641. config ZBOOT_ROM_TEXT
  1642. hex "Compressed ROM boot loader base address"
  1643. default "0"
  1644. help
  1645. The physical address at which the ROM-able zImage is to be
  1646. placed in the target. Platforms which normally make use of
  1647. ROM-able zImage formats normally set this to a suitable
  1648. value in their defconfig file.
  1649. If ZBOOT_ROM is not enabled, this has no effect.
  1650. config ZBOOT_ROM_BSS
  1651. hex "Compressed ROM boot loader BSS address"
  1652. default "0"
  1653. help
  1654. The base address of an area of read/write memory in the target
  1655. for the ROM-able zImage which must be available while the
  1656. decompressor is running. It must be large enough to hold the
  1657. entire decompressed kernel plus an additional 128 KiB.
  1658. Platforms which normally make use of ROM-able zImage formats
  1659. normally set this to a suitable value in their defconfig file.
  1660. If ZBOOT_ROM is not enabled, this has no effect.
  1661. config ZBOOT_ROM
  1662. bool "Compressed boot loader in ROM/flash"
  1663. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  1664. help
  1665. Say Y here if you intend to execute your compressed kernel image
  1666. (zImage) directly from ROM or flash. If unsure, say N.
  1667. choice
  1668. prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)"
  1669. depends on ZBOOT_ROM && ARCH_SH7372
  1670. default ZBOOT_ROM_NONE
  1671. help
  1672. Include experimental SD/MMC loading code in the ROM-able zImage.
  1673. With this enabled it is possible to write the ROM-able zImage
  1674. kernel image to an MMC or SD card and boot the kernel straight
  1675. from the reset vector. At reset the processor Mask ROM will load
  1676. the first part of the ROM-able zImage which in turn loads the
  1677. rest the kernel image to RAM.
  1678. config ZBOOT_ROM_NONE
  1679. bool "No SD/MMC loader in zImage (EXPERIMENTAL)"
  1680. help
  1681. Do not load image from SD or MMC
  1682. config ZBOOT_ROM_MMCIF
  1683. bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
  1684. help
  1685. Load image from MMCIF hardware block.
  1686. config ZBOOT_ROM_SH_MOBILE_SDHI
  1687. bool "Include SuperH Mobile SDHI loader in zImage (EXPERIMENTAL)"
  1688. help
  1689. Load image from SDHI hardware block
  1690. endchoice
  1691. config ARM_APPENDED_DTB
  1692. bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
  1693. depends on OF && !ZBOOT_ROM
  1694. help
  1695. With this option, the boot code will look for a device tree binary
  1696. (DTB) appended to zImage
  1697. (e.g. cat zImage <filename>.dtb > zImage_w_dtb).
  1698. This is meant as a backward compatibility convenience for those
  1699. systems with a bootloader that can't be upgraded to accommodate
  1700. the documented boot protocol using a device tree.
  1701. Beware that there is very little in terms of protection against
  1702. this option being confused by leftover garbage in memory that might
  1703. look like a DTB header after a reboot if no actual DTB is appended
  1704. to zImage. Do not leave this option active in a production kernel
  1705. if you don't intend to always append a DTB. Proper passing of the
  1706. location into r2 of a bootloader provided DTB is always preferable
  1707. to this option.
  1708. config ARM_ATAG_DTB_COMPAT
  1709. bool "Supplement the appended DTB with traditional ATAG information"
  1710. depends on ARM_APPENDED_DTB
  1711. help
  1712. Some old bootloaders can't be updated to a DTB capable one, yet
  1713. they provide ATAGs with memory configuration, the ramdisk address,
  1714. the kernel cmdline string, etc. Such information is dynamically
  1715. provided by the bootloader and can't always be stored in a static
  1716. DTB. To allow a device tree enabled kernel to be used with such
  1717. bootloaders, this option allows zImage to extract the information
  1718. from the ATAG list and store it at run time into the appended DTB.
  1719. choice
  1720. prompt "Kernel command line type" if ARM_ATAG_DTB_COMPAT
  1721. default ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
  1722. config ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
  1723. bool "Use bootloader kernel arguments if available"
  1724. help
  1725. Uses the command-line options passed by the boot loader instead of
  1726. the device tree bootargs property. If the boot loader doesn't provide
  1727. any, the device tree bootargs property will be used.
  1728. config ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEND
  1729. bool "Extend with bootloader kernel arguments"
  1730. help
  1731. The command-line arguments provided by the boot loader will be
  1732. appended to the the device tree bootargs property.
  1733. endchoice
  1734. config CMDLINE
  1735. string "Default kernel command string"
  1736. default ""
  1737. help
  1738. On some architectures (EBSA110 and CATS), there is currently no way
  1739. for the boot loader to pass arguments to the kernel. For these
  1740. architectures, you should supply some command-line options at build
  1741. time by entering them here. As a minimum, you should specify the
  1742. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  1743. choice
  1744. prompt "Kernel command line type" if CMDLINE != ""
  1745. default CMDLINE_FROM_BOOTLOADER
  1746. depends on ATAGS
  1747. config CMDLINE_FROM_BOOTLOADER
  1748. bool "Use bootloader kernel arguments if available"
  1749. help
  1750. Uses the command-line options passed by the boot loader. If
  1751. the boot loader doesn't provide any, the default kernel command
  1752. string provided in CMDLINE will be used.
  1753. config CMDLINE_EXTEND
  1754. bool "Extend bootloader kernel arguments"
  1755. help
  1756. The command-line arguments provided by the boot loader will be
  1757. appended to the default kernel command string.
  1758. config CMDLINE_FORCE
  1759. bool "Always use the default kernel command string"
  1760. help
  1761. Always use the default kernel command string, even if the boot
  1762. loader passes other arguments to the kernel.
  1763. This is useful if you cannot or don't want to change the
  1764. command-line options your boot loader passes to the kernel.
  1765. endchoice
  1766. config XIP_KERNEL
  1767. bool "Kernel Execute-In-Place from ROM"
  1768. depends on !ZBOOT_ROM && !ARM_LPAE && !ARCH_MULTIPLATFORM
  1769. help
  1770. Execute-In-Place allows the kernel to run from non-volatile storage
  1771. directly addressable by the CPU, such as NOR flash. This saves RAM
  1772. space since the text section of the kernel is not loaded from flash
  1773. to RAM. Read-write sections, such as the data section and stack,
  1774. are still copied to RAM. The XIP kernel is not compressed since
  1775. it has to run directly from flash, so it will take more space to
  1776. store it. The flash address used to link the kernel object files,
  1777. and for storing it, is configuration dependent. Therefore, if you
  1778. say Y here, you must know the proper physical address where to
  1779. store the kernel image depending on your own flash memory usage.
  1780. Also note that the make target becomes "make xipImage" rather than
  1781. "make zImage" or "make Image". The final kernel binary to put in
  1782. ROM memory will be arch/arm/boot/xipImage.
  1783. If unsure, say N.
  1784. config XIP_PHYS_ADDR
  1785. hex "XIP Kernel Physical Location"
  1786. depends on XIP_KERNEL
  1787. default "0x00080000"
  1788. help
  1789. This is the physical address in your flash memory the kernel will
  1790. be linked for and stored to. This address is dependent on your
  1791. own flash usage.
  1792. config KEXEC
  1793. bool "Kexec system call (EXPERIMENTAL)"
  1794. depends on (!SMP || HOTPLUG_CPU)
  1795. help
  1796. kexec is a system call that implements the ability to shutdown your
  1797. current kernel, and to start another kernel. It is like a reboot
  1798. but it is independent of the system firmware. And like a reboot
  1799. you can start any kernel with it, not just Linux.
  1800. It is an ongoing process to be certain the hardware in a machine
  1801. is properly shutdown, so do not be surprised if this code does not
  1802. initially work for you. It may help to enable device hotplugging
  1803. support.
  1804. config ATAGS_PROC
  1805. bool "Export atags in procfs"
  1806. depends on ATAGS && KEXEC
  1807. default y
  1808. help
  1809. Should the atags used to boot the kernel be exported in an "atags"
  1810. file in procfs. Useful with kexec.
  1811. config CRASH_DUMP
  1812. bool "Build kdump crash kernel (EXPERIMENTAL)"
  1813. help
  1814. Generate crash dump after being started by kexec. This should
  1815. be normally only set in special crash dump kernels which are
  1816. loaded in the main kernel with kexec-tools into a specially
  1817. reserved region and then later executed after a crash by
  1818. kdump/kexec. The crash dump kernel must be compiled to a
  1819. memory address not used by the main kernel
  1820. For more details see Documentation/kdump/kdump.txt
  1821. config AUTO_ZRELADDR
  1822. bool "Auto calculation of the decompressed kernel image address"
  1823. depends on !ZBOOT_ROM && !ARCH_U300
  1824. help
  1825. ZRELADDR is the physical address where the decompressed kernel
  1826. image will be placed. If AUTO_ZRELADDR is selected, the address
  1827. will be determined at run-time by masking the current IP with
  1828. 0xf8000000. This assumes the zImage being placed in the first 128MB
  1829. from start of memory.
  1830. endmenu
  1831. menu "CPU Power Management"
  1832. if ARCH_HAS_CPUFREQ
  1833. source "drivers/cpufreq/Kconfig"
  1834. config CPU_FREQ_IMX
  1835. tristate "CPUfreq driver for i.MX CPUs"
  1836. depends on ARCH_MXC && CPU_FREQ
  1837. select CPU_FREQ_TABLE
  1838. help
  1839. This enables the CPUfreq driver for i.MX CPUs.
  1840. config CPU_FREQ_SA1100
  1841. bool
  1842. config CPU_FREQ_SA1110
  1843. bool
  1844. config CPU_FREQ_INTEGRATOR
  1845. tristate "CPUfreq driver for ARM Integrator CPUs"
  1846. depends on ARCH_INTEGRATOR && CPU_FREQ
  1847. default y
  1848. help
  1849. This enables the CPUfreq driver for ARM Integrator CPUs.
  1850. For details, take a look at <file:Documentation/cpu-freq>.
  1851. If in doubt, say Y.
  1852. config CPU_FREQ_PXA
  1853. bool
  1854. depends on CPU_FREQ && ARCH_PXA && PXA25x
  1855. default y
  1856. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  1857. select CPU_FREQ_TABLE
  1858. config CPU_FREQ_S3C
  1859. bool
  1860. help
  1861. Internal configuration node for common cpufreq on Samsung SoC
  1862. config CPU_FREQ_S3C24XX
  1863. bool "CPUfreq driver for Samsung S3C24XX series CPUs (EXPERIMENTAL)"
  1864. depends on ARCH_S3C24XX && CPU_FREQ
  1865. select CPU_FREQ_S3C
  1866. help
  1867. This enables the CPUfreq driver for the Samsung S3C24XX family
  1868. of CPUs.
  1869. For details, take a look at <file:Documentation/cpu-freq>.
  1870. If in doubt, say N.
  1871. config CPU_FREQ_S3C24XX_PLL
  1872. bool "Support CPUfreq changing of PLL frequency (EXPERIMENTAL)"
  1873. depends on CPU_FREQ_S3C24XX
  1874. help
  1875. Compile in support for changing the PLL frequency from the
  1876. S3C24XX series CPUfreq driver. The PLL takes time to settle
  1877. after a frequency change, so by default it is not enabled.
  1878. This also means that the PLL tables for the selected CPU(s) will
  1879. be built which may increase the size of the kernel image.
  1880. config CPU_FREQ_S3C24XX_DEBUG
  1881. bool "Debug CPUfreq Samsung driver core"
  1882. depends on CPU_FREQ_S3C24XX
  1883. help
  1884. Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
  1885. config CPU_FREQ_S3C24XX_IODEBUG
  1886. bool "Debug CPUfreq Samsung driver IO timing"
  1887. depends on CPU_FREQ_S3C24XX
  1888. help
  1889. Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
  1890. config CPU_FREQ_S3C24XX_DEBUGFS
  1891. bool "Export debugfs for CPUFreq"
  1892. depends on CPU_FREQ_S3C24XX && DEBUG_FS
  1893. help
  1894. Export status information via debugfs.
  1895. endif
  1896. source "drivers/cpuidle/Kconfig"
  1897. endmenu
  1898. menu "Floating point emulation"
  1899. comment "At least one emulation must be selected"
  1900. config FPE_NWFPE
  1901. bool "NWFPE math emulation"
  1902. depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
  1903. ---help---
  1904. Say Y to include the NWFPE floating point emulator in the kernel.
  1905. This is necessary to run most binaries. Linux does not currently
  1906. support floating point hardware so you need to say Y here even if
  1907. your machine has an FPA or floating point co-processor podule.
  1908. You may say N here if you are going to load the Acorn FPEmulator
  1909. early in the bootup.
  1910. config FPE_NWFPE_XP
  1911. bool "Support extended precision"
  1912. depends on FPE_NWFPE
  1913. help
  1914. Say Y to include 80-bit support in the kernel floating-point
  1915. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  1916. Note that gcc does not generate 80-bit operations by default,
  1917. so in most cases this option only enlarges the size of the
  1918. floating point emulator without any good reason.
  1919. You almost surely want to say N here.
  1920. config FPE_FASTFPE
  1921. bool "FastFPE math emulation (EXPERIMENTAL)"
  1922. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3
  1923. ---help---
  1924. Say Y here to include the FAST floating point emulator in the kernel.
  1925. This is an experimental much faster emulator which now also has full
  1926. precision for the mantissa. It does not support any exceptions.
  1927. It is very simple, and approximately 3-6 times faster than NWFPE.
  1928. It should be sufficient for most programs. It may be not suitable
  1929. for scientific calculations, but you have to check this for yourself.
  1930. If you do not feel you need a faster FP emulation you should better
  1931. choose NWFPE.
  1932. config VFP
  1933. bool "VFP-format floating point maths"
  1934. depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  1935. help
  1936. Say Y to include VFP support code in the kernel. This is needed
  1937. if your hardware includes a VFP unit.
  1938. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  1939. release notes and additional status information.
  1940. Say N if your target does not have VFP hardware.
  1941. config VFPv3
  1942. bool
  1943. depends on VFP
  1944. default y if CPU_V7
  1945. config NEON
  1946. bool "Advanced SIMD (NEON) Extension support"
  1947. depends on VFPv3 && CPU_V7
  1948. help
  1949. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  1950. Extension.
  1951. endmenu
  1952. menu "Userspace binary formats"
  1953. source "fs/Kconfig.binfmt"
  1954. config ARTHUR
  1955. tristate "RISC OS personality"
  1956. depends on !AEABI
  1957. help
  1958. Say Y here to include the kernel code necessary if you want to run
  1959. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  1960. experimental; if this sounds frightening, say N and sleep in peace.
  1961. You can also say M here to compile this support as a module (which
  1962. will be called arthur).
  1963. endmenu
  1964. menu "Power management options"
  1965. source "kernel/power/Kconfig"
  1966. config ARCH_SUSPEND_POSSIBLE
  1967. depends on !ARCH_S5PC100
  1968. depends on CPU_ARM920T || CPU_ARM926T || CPU_SA1100 || \
  1969. CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE || CPU_MOHAWK
  1970. def_bool y
  1971. config ARM_CPU_SUSPEND
  1972. def_bool PM_SLEEP
  1973. endmenu
  1974. source "net/Kconfig"
  1975. source "drivers/Kconfig"
  1976. source "fs/Kconfig"
  1977. source "arch/arm/Kconfig.debug"
  1978. source "security/Kconfig"
  1979. source "crypto/Kconfig"
  1980. source "lib/Kconfig"
  1981. source "arch/arm/kvm/Kconfig"