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. help
  335. Support for Cavium Networks CNS3XXX platform.
  336. config ARCH_CLPS711X
  337. bool "Cirrus Logic CLPS711x/EP721x/EP731x-based"
  338. select ARCH_REQUIRE_GPIOLIB
  339. select AUTO_ZRELADDR
  340. select CLKDEV_LOOKUP
  341. select COMMON_CLK
  342. select CPU_ARM720T
  343. select GENERIC_CLOCKEVENTS
  344. select MULTI_IRQ_HANDLER
  345. select NEED_MACH_MEMORY_H
  346. select SPARSE_IRQ
  347. help
  348. Support for Cirrus Logic 711x/721x/731x based boards.
  349. config ARCH_GEMINI
  350. bool "Cortina Systems Gemini"
  351. select ARCH_REQUIRE_GPIOLIB
  352. select ARCH_USES_GETTIMEOFFSET
  353. select NEED_MACH_GPIO_H
  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_IOP13XX
  430. bool "IOP13xx-based"
  431. depends on MMU
  432. select ARCH_SUPPORTS_MSI
  433. select CPU_XSC3
  434. select NEED_MACH_MEMORY_H
  435. select NEED_RET_TO_USER
  436. select PCI
  437. select PLAT_IOP
  438. select VMSPLIT_1G
  439. help
  440. Support for Intel's IOP13XX (XScale) family of processors.
  441. config ARCH_IOP32X
  442. bool "IOP32x-based"
  443. depends on MMU
  444. select ARCH_REQUIRE_GPIOLIB
  445. select CPU_XSCALE
  446. select NEED_MACH_GPIO_H
  447. select NEED_RET_TO_USER
  448. select PCI
  449. select PLAT_IOP
  450. help
  451. Support for Intel's 80219 and IOP32X (XScale) family of
  452. processors.
  453. config ARCH_IOP33X
  454. bool "IOP33x-based"
  455. depends on MMU
  456. select ARCH_REQUIRE_GPIOLIB
  457. select CPU_XSCALE
  458. select NEED_MACH_GPIO_H
  459. select NEED_RET_TO_USER
  460. select PCI
  461. select PLAT_IOP
  462. help
  463. Support for Intel's IOP33X (XScale) family of processors.
  464. config ARCH_IXP4XX
  465. bool "IXP4xx-based"
  466. depends on MMU
  467. select ARCH_HAS_DMA_SET_COHERENT_MASK
  468. select ARCH_REQUIRE_GPIOLIB
  469. select CLKSRC_MMIO
  470. select CPU_XSCALE
  471. select DMABOUNCE if PCI
  472. select GENERIC_CLOCKEVENTS
  473. select MIGHT_HAVE_PCI
  474. select NEED_MACH_IO_H
  475. help
  476. Support for Intel's IXP4XX (XScale) family of processors.
  477. config ARCH_DOVE
  478. bool "Marvell Dove"
  479. select ARCH_REQUIRE_GPIOLIB
  480. select COMMON_CLK_DOVE
  481. select CPU_V7
  482. select GENERIC_CLOCKEVENTS
  483. select MIGHT_HAVE_PCI
  484. select PINCTRL
  485. select PINCTRL_DOVE
  486. select PLAT_ORION_LEGACY
  487. select USB_ARCH_HAS_EHCI
  488. help
  489. Support for the Marvell Dove SoC 88AP510
  490. config ARCH_KIRKWOOD
  491. bool "Marvell Kirkwood"
  492. select ARCH_REQUIRE_GPIOLIB
  493. select CPU_FEROCEON
  494. select GENERIC_CLOCKEVENTS
  495. select PCI
  496. select PCI_QUIRKS
  497. select PINCTRL
  498. select PINCTRL_KIRKWOOD
  499. select PLAT_ORION_LEGACY
  500. help
  501. Support for the following Marvell Kirkwood series SoCs:
  502. 88F6180, 88F6192 and 88F6281.
  503. config ARCH_MV78XX0
  504. bool "Marvell MV78xx0"
  505. select ARCH_REQUIRE_GPIOLIB
  506. select CPU_FEROCEON
  507. select GENERIC_CLOCKEVENTS
  508. select PCI
  509. select PLAT_ORION_LEGACY
  510. help
  511. Support for the following Marvell MV78xx0 series SoCs:
  512. MV781x0, MV782x0.
  513. config ARCH_ORION5X
  514. bool "Marvell Orion"
  515. depends on MMU
  516. select ARCH_REQUIRE_GPIOLIB
  517. select CPU_FEROCEON
  518. select GENERIC_CLOCKEVENTS
  519. select PCI
  520. select PLAT_ORION_LEGACY
  521. help
  522. Support for the following Marvell Orion 5x series SoCs:
  523. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  524. Orion-2 (5281), Orion-1-90 (6183).
  525. config ARCH_MMP
  526. bool "Marvell PXA168/910/MMP2"
  527. depends on MMU
  528. select ARCH_REQUIRE_GPIOLIB
  529. select CLKDEV_LOOKUP
  530. select GENERIC_ALLOCATOR
  531. select GENERIC_CLOCKEVENTS
  532. select GPIO_PXA
  533. select IRQ_DOMAIN
  534. select NEED_MACH_GPIO_H
  535. select PINCTRL
  536. select PLAT_PXA
  537. select SPARSE_IRQ
  538. help
  539. Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
  540. config ARCH_KS8695
  541. bool "Micrel/Kendin KS8695"
  542. select ARCH_REQUIRE_GPIOLIB
  543. select CLKSRC_MMIO
  544. select CPU_ARM922T
  545. select GENERIC_CLOCKEVENTS
  546. select NEED_MACH_MEMORY_H
  547. help
  548. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  549. System-on-Chip devices.
  550. config ARCH_W90X900
  551. bool "Nuvoton W90X900 CPU"
  552. select ARCH_REQUIRE_GPIOLIB
  553. select CLKDEV_LOOKUP
  554. select CLKSRC_MMIO
  555. select CPU_ARM926T
  556. select GENERIC_CLOCKEVENTS
  557. help
  558. Support for Nuvoton (Winbond logic dept.) ARM9 processor,
  559. At present, the w90x900 has been renamed nuc900, regarding
  560. the ARM series product line, you can login the following
  561. link address to know more.
  562. <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
  563. ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
  564. config ARCH_LPC32XX
  565. bool "NXP LPC32XX"
  566. select ARCH_REQUIRE_GPIOLIB
  567. select ARM_AMBA
  568. select CLKDEV_LOOKUP
  569. select CLKSRC_MMIO
  570. select CPU_ARM926T
  571. select GENERIC_CLOCKEVENTS
  572. select HAVE_IDE
  573. select HAVE_PWM
  574. select USB_ARCH_HAS_OHCI
  575. select USE_OF
  576. help
  577. Support for the NXP LPC32XX family of processors
  578. config ARCH_TEGRA
  579. bool "NVIDIA Tegra"
  580. select ARCH_HAS_CPUFREQ
  581. select ARCH_REQUIRE_GPIOLIB
  582. select CLKDEV_LOOKUP
  583. select CLKSRC_MMIO
  584. select CLKSRC_OF
  585. select COMMON_CLK
  586. select GENERIC_CLOCKEVENTS
  587. select HAVE_CLK
  588. select HAVE_SMP
  589. select MIGHT_HAVE_CACHE_L2X0
  590. select SPARSE_IRQ
  591. select USE_OF
  592. help
  593. This enables support for NVIDIA Tegra based systems (Tegra APX,
  594. Tegra 6xx and Tegra 2 series).
  595. config ARCH_PXA
  596. bool "PXA2xx/PXA3xx-based"
  597. depends on MMU
  598. select ARCH_HAS_CPUFREQ
  599. select ARCH_MTD_XIP
  600. select ARCH_REQUIRE_GPIOLIB
  601. select ARM_CPU_SUSPEND if PM
  602. select AUTO_ZRELADDR
  603. select CLKDEV_LOOKUP
  604. select CLKSRC_MMIO
  605. select GENERIC_CLOCKEVENTS
  606. select GPIO_PXA
  607. select HAVE_IDE
  608. select MULTI_IRQ_HANDLER
  609. select NEED_MACH_GPIO_H
  610. select PLAT_PXA
  611. select SPARSE_IRQ
  612. help
  613. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  614. config ARCH_MSM
  615. bool "Qualcomm MSM"
  616. select ARCH_REQUIRE_GPIOLIB
  617. select CLKDEV_LOOKUP
  618. select GENERIC_CLOCKEVENTS
  619. select HAVE_CLK
  620. help
  621. Support for Qualcomm MSM/QSD based systems. This runs on the
  622. apps processor of the MSM/QSD and depends on a shared memory
  623. interface to the modem processor which runs the baseband
  624. stack and controls some vital subsystems
  625. (clock and power control, etc).
  626. config ARCH_SHMOBILE
  627. bool "Renesas SH-Mobile / R-Mobile"
  628. select CLKDEV_LOOKUP
  629. select GENERIC_CLOCKEVENTS
  630. select HAVE_CLK
  631. select HAVE_MACH_CLKDEV
  632. select HAVE_SMP
  633. select MIGHT_HAVE_CACHE_L2X0
  634. select MULTI_IRQ_HANDLER
  635. select NEED_MACH_MEMORY_H
  636. select NO_IOPORT
  637. select PINCTRL
  638. select PM_GENERIC_DOMAINS if PM
  639. select SPARSE_IRQ
  640. help
  641. Support for Renesas's SH-Mobile and R-Mobile ARM platforms.
  642. config ARCH_RPC
  643. bool "RiscPC"
  644. select ARCH_ACORN
  645. select ARCH_MAY_HAVE_PC_FDC
  646. select ARCH_SPARSEMEM_ENABLE
  647. select ARCH_USES_GETTIMEOFFSET
  648. select FIQ
  649. select HAVE_IDE
  650. select HAVE_PATA_PLATFORM
  651. select ISA_DMA_API
  652. select NEED_MACH_IO_H
  653. select NEED_MACH_MEMORY_H
  654. select NO_IOPORT
  655. help
  656. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  657. CD-ROM interface, serial and parallel port, and the floppy drive.
  658. config ARCH_SA1100
  659. bool "SA1100-based"
  660. select ARCH_HAS_CPUFREQ
  661. select ARCH_MTD_XIP
  662. select ARCH_REQUIRE_GPIOLIB
  663. select ARCH_SPARSEMEM_ENABLE
  664. select CLKDEV_LOOKUP
  665. select CLKSRC_MMIO
  666. select CPU_FREQ
  667. select CPU_SA1100
  668. select GENERIC_CLOCKEVENTS
  669. select HAVE_IDE
  670. select ISA
  671. select NEED_MACH_GPIO_H
  672. select NEED_MACH_MEMORY_H
  673. select SPARSE_IRQ
  674. help
  675. Support for StrongARM 11x0 based boards.
  676. config ARCH_S3C24XX
  677. bool "Samsung S3C24XX SoCs"
  678. select ARCH_HAS_CPUFREQ
  679. select ARCH_USES_GETTIMEOFFSET
  680. select CLKDEV_LOOKUP
  681. select HAVE_CLK
  682. select HAVE_S3C2410_I2C if I2C
  683. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  684. select HAVE_S3C_RTC if RTC_CLASS
  685. select NEED_MACH_GPIO_H
  686. select NEED_MACH_IO_H
  687. help
  688. Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443
  689. and S3C2450 SoCs based systems, such as the Simtec Electronics BAST
  690. (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or the
  691. Samsung SMDK2410 development board (and derivatives).
  692. config ARCH_S3C64XX
  693. bool "Samsung S3C64XX"
  694. select ARCH_HAS_CPUFREQ
  695. select ARCH_REQUIRE_GPIOLIB
  696. select ARCH_USES_GETTIMEOFFSET
  697. select ARM_VIC
  698. select CLKDEV_LOOKUP
  699. select CPU_V6
  700. select HAVE_CLK
  701. select HAVE_S3C2410_I2C if I2C
  702. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  703. select HAVE_TCM
  704. select NEED_MACH_GPIO_H
  705. select NO_IOPORT
  706. select PLAT_SAMSUNG
  707. select S3C_DEV_NAND
  708. select S3C_GPIO_TRACK
  709. select SAMSUNG_CLKSRC
  710. select SAMSUNG_GPIOLIB_4BIT
  711. select SAMSUNG_IRQ_VIC_TIMER
  712. select USB_ARCH_HAS_OHCI
  713. help
  714. Samsung S3C64XX series based systems
  715. config ARCH_S5P64X0
  716. bool "Samsung S5P6440 S5P6450"
  717. select CLKDEV_LOOKUP
  718. select CLKSRC_MMIO
  719. select CPU_V6
  720. select GENERIC_CLOCKEVENTS
  721. select HAVE_CLK
  722. select HAVE_S3C2410_I2C if I2C
  723. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  724. select HAVE_S3C_RTC if RTC_CLASS
  725. select NEED_MACH_GPIO_H
  726. help
  727. Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
  728. SMDK6450.
  729. config ARCH_S5PC100
  730. bool "Samsung S5PC100"
  731. select ARCH_USES_GETTIMEOFFSET
  732. select CLKDEV_LOOKUP
  733. select CPU_V7
  734. select HAVE_CLK
  735. select HAVE_S3C2410_I2C if I2C
  736. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  737. select HAVE_S3C_RTC if RTC_CLASS
  738. select NEED_MACH_GPIO_H
  739. help
  740. Samsung S5PC100 series based systems
  741. config ARCH_S5PV210
  742. bool "Samsung S5PV210/S5PC110"
  743. select ARCH_HAS_CPUFREQ
  744. select ARCH_HAS_HOLES_MEMORYMODEL
  745. select ARCH_SPARSEMEM_ENABLE
  746. select CLKDEV_LOOKUP
  747. select CLKSRC_MMIO
  748. select CPU_V7
  749. select GENERIC_CLOCKEVENTS
  750. select HAVE_CLK
  751. select HAVE_S3C2410_I2C if I2C
  752. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  753. select HAVE_S3C_RTC if RTC_CLASS
  754. select NEED_MACH_GPIO_H
  755. select NEED_MACH_MEMORY_H
  756. help
  757. Samsung S5PV210/S5PC110 series based systems
  758. config ARCH_EXYNOS
  759. bool "Samsung EXYNOS"
  760. select ARCH_HAS_CPUFREQ
  761. select ARCH_HAS_HOLES_MEMORYMODEL
  762. select ARCH_SPARSEMEM_ENABLE
  763. select CLKDEV_LOOKUP
  764. select CPU_V7
  765. select GENERIC_CLOCKEVENTS
  766. select HAVE_CLK
  767. select HAVE_S3C2410_I2C if I2C
  768. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  769. select HAVE_S3C_RTC if RTC_CLASS
  770. select NEED_MACH_GPIO_H
  771. select NEED_MACH_MEMORY_H
  772. help
  773. Support for SAMSUNG's EXYNOS SoCs (EXYNOS4/5)
  774. config ARCH_SHARK
  775. bool "Shark"
  776. select ARCH_USES_GETTIMEOFFSET
  777. select CPU_SA110
  778. select ISA
  779. select ISA_DMA
  780. select NEED_MACH_MEMORY_H
  781. select PCI
  782. select ZONE_DMA
  783. help
  784. Support for the StrongARM based Digital DNARD machine, also known
  785. as "Shark" (<http://www.shark-linux.de/shark.html>).
  786. config ARCH_U300
  787. bool "ST-Ericsson U300 Series"
  788. depends on MMU
  789. select ARCH_REQUIRE_GPIOLIB
  790. select ARM_AMBA
  791. select ARM_PATCH_PHYS_VIRT
  792. select ARM_VIC
  793. select CLKDEV_LOOKUP
  794. select CLKSRC_MMIO
  795. select COMMON_CLK
  796. select CPU_ARM926T
  797. select GENERIC_CLOCKEVENTS
  798. select HAVE_TCM
  799. select SPARSE_IRQ
  800. help
  801. Support for ST-Ericsson U300 series mobile platforms.
  802. config ARCH_U8500
  803. bool "ST-Ericsson U8500 Series"
  804. depends on MMU
  805. select ARCH_HAS_CPUFREQ
  806. select ARCH_REQUIRE_GPIOLIB
  807. select ARM_AMBA
  808. select CLKDEV_LOOKUP
  809. select CPU_V7
  810. select GENERIC_CLOCKEVENTS
  811. select HAVE_SMP
  812. select MIGHT_HAVE_CACHE_L2X0
  813. select SPARSE_IRQ
  814. help
  815. Support for ST-Ericsson's Ux500 architecture
  816. config ARCH_NOMADIK
  817. bool "STMicroelectronics Nomadik"
  818. select ARCH_REQUIRE_GPIOLIB
  819. select ARM_AMBA
  820. select ARM_VIC
  821. select CLKSRC_NOMADIK_MTU
  822. select COMMON_CLK
  823. select CPU_ARM926T
  824. select GENERIC_CLOCKEVENTS
  825. select MIGHT_HAVE_CACHE_L2X0
  826. select USE_OF
  827. select PINCTRL
  828. select PINCTRL_STN8815
  829. select SPARSE_IRQ
  830. help
  831. Support for the Nomadik platform by ST-Ericsson
  832. config PLAT_SPEAR
  833. bool "ST SPEAr"
  834. select ARCH_HAS_CPUFREQ
  835. select ARCH_REQUIRE_GPIOLIB
  836. select ARM_AMBA
  837. select CLKDEV_LOOKUP
  838. select CLKSRC_MMIO
  839. select COMMON_CLK
  840. select GENERIC_CLOCKEVENTS
  841. select HAVE_CLK
  842. help
  843. Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
  844. config ARCH_DAVINCI
  845. bool "TI DaVinci"
  846. select ARCH_HAS_HOLES_MEMORYMODEL
  847. select ARCH_REQUIRE_GPIOLIB
  848. select CLKDEV_LOOKUP
  849. select GENERIC_ALLOCATOR
  850. select GENERIC_CLOCKEVENTS
  851. select GENERIC_IRQ_CHIP
  852. select HAVE_IDE
  853. select NEED_MACH_GPIO_H
  854. select USE_OF
  855. select ZONE_DMA
  856. help
  857. Support for TI's DaVinci platform.
  858. config ARCH_OMAP1
  859. bool "TI OMAP1"
  860. depends on MMU
  861. select ARCH_HAS_CPUFREQ
  862. select ARCH_HAS_HOLES_MEMORYMODEL
  863. select ARCH_OMAP
  864. select ARCH_REQUIRE_GPIOLIB
  865. select CLKDEV_LOOKUP
  866. select CLKSRC_MMIO
  867. select GENERIC_CLOCKEVENTS
  868. select GENERIC_IRQ_CHIP
  869. select HAVE_CLK
  870. select HAVE_IDE
  871. select IRQ_DOMAIN
  872. select NEED_MACH_IO_H if PCCARD
  873. select NEED_MACH_MEMORY_H
  874. help
  875. Support for older TI OMAP1 (omap7xx, omap15xx or omap16xx)
  876. endchoice
  877. menu "Multiple platform selection"
  878. depends on ARCH_MULTIPLATFORM
  879. comment "CPU Core family selection"
  880. config ARCH_MULTI_V4
  881. bool "ARMv4 based platforms (FA526, StrongARM)"
  882. depends on !ARCH_MULTI_V6_V7
  883. select ARCH_MULTI_V4_V5
  884. config ARCH_MULTI_V4T
  885. bool "ARMv4T based platforms (ARM720T, ARM920T, ...)"
  886. depends on !ARCH_MULTI_V6_V7
  887. select ARCH_MULTI_V4_V5
  888. config ARCH_MULTI_V5
  889. bool "ARMv5 based platforms (ARM926T, XSCALE, PJ1, ...)"
  890. depends on !ARCH_MULTI_V6_V7
  891. select ARCH_MULTI_V4_V5
  892. config ARCH_MULTI_V4_V5
  893. bool
  894. config ARCH_MULTI_V6
  895. bool "ARMv6 based platforms (ARM11, Scorpion, ...)"
  896. select ARCH_MULTI_V6_V7
  897. select CPU_V6
  898. config ARCH_MULTI_V7
  899. bool "ARMv7 based platforms (Cortex-A, PJ4, Krait)"
  900. default y
  901. select ARCH_MULTI_V6_V7
  902. select ARCH_VEXPRESS
  903. select CPU_V7
  904. config ARCH_MULTI_V6_V7
  905. bool
  906. config ARCH_MULTI_CPU_AUTO
  907. def_bool !(ARCH_MULTI_V4 || ARCH_MULTI_V4T || ARCH_MULTI_V6_V7)
  908. select ARCH_MULTI_V5
  909. endmenu
  910. #
  911. # This is sorted alphabetically by mach-* pathname. However, plat-*
  912. # Kconfigs may be included either alphabetically (according to the
  913. # plat- suffix) or along side the corresponding mach-* source.
  914. #
  915. source "arch/arm/mach-mvebu/Kconfig"
  916. source "arch/arm/mach-at91/Kconfig"
  917. source "arch/arm/mach-bcm/Kconfig"
  918. source "arch/arm/mach-clps711x/Kconfig"
  919. source "arch/arm/mach-cns3xxx/Kconfig"
  920. source "arch/arm/mach-davinci/Kconfig"
  921. source "arch/arm/mach-dove/Kconfig"
  922. source "arch/arm/mach-ep93xx/Kconfig"
  923. source "arch/arm/mach-footbridge/Kconfig"
  924. source "arch/arm/mach-gemini/Kconfig"
  925. source "arch/arm/mach-highbank/Kconfig"
  926. source "arch/arm/mach-integrator/Kconfig"
  927. source "arch/arm/mach-iop32x/Kconfig"
  928. source "arch/arm/mach-iop33x/Kconfig"
  929. source "arch/arm/mach-iop13xx/Kconfig"
  930. source "arch/arm/mach-ixp4xx/Kconfig"
  931. source "arch/arm/mach-kirkwood/Kconfig"
  932. source "arch/arm/mach-ks8695/Kconfig"
  933. source "arch/arm/mach-msm/Kconfig"
  934. source "arch/arm/mach-mv78xx0/Kconfig"
  935. source "arch/arm/mach-imx/Kconfig"
  936. source "arch/arm/mach-mxs/Kconfig"
  937. source "arch/arm/mach-netx/Kconfig"
  938. source "arch/arm/mach-nomadik/Kconfig"
  939. source "arch/arm/plat-omap/Kconfig"
  940. source "arch/arm/mach-omap1/Kconfig"
  941. source "arch/arm/mach-omap2/Kconfig"
  942. source "arch/arm/mach-orion5x/Kconfig"
  943. source "arch/arm/mach-picoxcell/Kconfig"
  944. source "arch/arm/mach-pxa/Kconfig"
  945. source "arch/arm/plat-pxa/Kconfig"
  946. source "arch/arm/mach-mmp/Kconfig"
  947. source "arch/arm/mach-realview/Kconfig"
  948. source "arch/arm/mach-sa1100/Kconfig"
  949. source "arch/arm/plat-samsung/Kconfig"
  950. source "arch/arm/mach-socfpga/Kconfig"
  951. source "arch/arm/plat-spear/Kconfig"
  952. source "arch/arm/mach-s3c24xx/Kconfig"
  953. if ARCH_S3C64XX
  954. source "arch/arm/mach-s3c64xx/Kconfig"
  955. endif
  956. source "arch/arm/mach-s5p64x0/Kconfig"
  957. source "arch/arm/mach-s5pc100/Kconfig"
  958. source "arch/arm/mach-s5pv210/Kconfig"
  959. source "arch/arm/mach-exynos/Kconfig"
  960. source "arch/arm/mach-shmobile/Kconfig"
  961. source "arch/arm/mach-sunxi/Kconfig"
  962. source "arch/arm/mach-prima2/Kconfig"
  963. source "arch/arm/mach-tegra/Kconfig"
  964. source "arch/arm/mach-u300/Kconfig"
  965. source "arch/arm/mach-ux500/Kconfig"
  966. source "arch/arm/mach-versatile/Kconfig"
  967. source "arch/arm/mach-vexpress/Kconfig"
  968. source "arch/arm/plat-versatile/Kconfig"
  969. source "arch/arm/mach-virt/Kconfig"
  970. source "arch/arm/mach-vt8500/Kconfig"
  971. source "arch/arm/mach-w90x900/Kconfig"
  972. source "arch/arm/mach-zynq/Kconfig"
  973. # Definitions to make life easier
  974. config ARCH_ACORN
  975. bool
  976. config PLAT_IOP
  977. bool
  978. select GENERIC_CLOCKEVENTS
  979. config PLAT_ORION
  980. bool
  981. select CLKSRC_MMIO
  982. select COMMON_CLK
  983. select GENERIC_IRQ_CHIP
  984. select IRQ_DOMAIN
  985. config PLAT_ORION_LEGACY
  986. bool
  987. select PLAT_ORION
  988. config PLAT_PXA
  989. bool
  990. config PLAT_VERSATILE
  991. bool
  992. config ARM_TIMER_SP804
  993. bool
  994. select CLKSRC_MMIO
  995. select HAVE_SCHED_CLOCK
  996. source arch/arm/mm/Kconfig
  997. config ARM_NR_BANKS
  998. int
  999. default 16 if ARCH_EP93XX
  1000. default 8
  1001. config IWMMXT
  1002. bool "Enable iWMMXt support"
  1003. depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
  1004. default y if PXA27x || PXA3xx || ARCH_MMP
  1005. help
  1006. Enable support for iWMMXt context switching at run time if
  1007. running on a CPU that supports it.
  1008. config XSCALE_PMU
  1009. bool
  1010. depends on CPU_XSCALE
  1011. default y
  1012. config MULTI_IRQ_HANDLER
  1013. bool
  1014. help
  1015. Allow each machine to specify it's own IRQ handler at run time.
  1016. if !MMU
  1017. source "arch/arm/Kconfig-nommu"
  1018. endif
  1019. config ARM_ERRATA_326103
  1020. bool "ARM errata: FSR write bit incorrect on a SWP to read-only memory"
  1021. depends on CPU_V6
  1022. help
  1023. Executing a SWP instruction to read-only memory does not set bit 11
  1024. of the FSR on the ARM 1136 prior to r1p0. This causes the kernel to
  1025. treat the access as a read, preventing a COW from occurring and
  1026. causing the faulting task to livelock.
  1027. config ARM_ERRATA_411920
  1028. bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
  1029. depends on CPU_V6 || CPU_V6K
  1030. help
  1031. Invalidation of the Instruction Cache operation can
  1032. fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
  1033. It does not affect the MPCore. This option enables the ARM Ltd.
  1034. recommended workaround.
  1035. config ARM_ERRATA_430973
  1036. bool "ARM errata: Stale prediction on replaced interworking branch"
  1037. depends on CPU_V7
  1038. help
  1039. This option enables the workaround for the 430973 Cortex-A8
  1040. (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
  1041. interworking branch is replaced with another code sequence at the
  1042. same virtual address, whether due to self-modifying code or virtual
  1043. to physical address re-mapping, Cortex-A8 does not recover from the
  1044. stale interworking branch prediction. This results in Cortex-A8
  1045. executing the new code sequence in the incorrect ARM or Thumb state.
  1046. The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
  1047. and also flushes the branch target cache at every context switch.
  1048. Note that setting specific bits in the ACTLR register may not be
  1049. available in non-secure mode.
  1050. config ARM_ERRATA_458693
  1051. bool "ARM errata: Processor deadlock when a false hazard is created"
  1052. depends on CPU_V7
  1053. depends on !ARCH_MULTIPLATFORM
  1054. help
  1055. This option enables the workaround for the 458693 Cortex-A8 (r2p0)
  1056. erratum. For very specific sequences of memory operations, it is
  1057. possible for a hazard condition intended for a cache line to instead
  1058. be incorrectly associated with a different cache line. This false
  1059. hazard might then cause a processor deadlock. The workaround enables
  1060. the L1 caching of the NEON accesses and disables the PLD instruction
  1061. in the ACTLR register. Note that setting specific bits in the ACTLR
  1062. register may not be available in non-secure mode.
  1063. config ARM_ERRATA_460075
  1064. bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
  1065. depends on CPU_V7
  1066. depends on !ARCH_MULTIPLATFORM
  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. depends on !ARCH_MULTIPLATFORM
  1079. help
  1080. This option enables the workaround for the 742230 Cortex-A9
  1081. (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
  1082. between two write operations may not ensure the correct visibility
  1083. ordering of the two writes. This workaround sets a specific bit in
  1084. the diagnostic register of the Cortex-A9 which causes the DMB
  1085. instruction to behave as a DSB, ensuring the correct behaviour of
  1086. the two writes.
  1087. config ARM_ERRATA_742231
  1088. bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
  1089. depends on CPU_V7 && SMP
  1090. depends on !ARCH_MULTIPLATFORM
  1091. help
  1092. This option enables the workaround for the 742231 Cortex-A9
  1093. (r2p0..r2p2) erratum. Under certain conditions, specific to the
  1094. Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
  1095. accessing some data located in the same cache line, may get corrupted
  1096. data due to bad handling of the address hazard when the line gets
  1097. replaced from one of the CPUs at the same time as another CPU is
  1098. accessing it. This workaround sets specific bits in the diagnostic
  1099. register of the Cortex-A9 which reduces the linefill issuing
  1100. capabilities of the processor.
  1101. config PL310_ERRATA_588369
  1102. bool "PL310 errata: Clean & Invalidate maintenance operations do not invalidate clean lines"
  1103. depends on CACHE_L2X0
  1104. help
  1105. The PL310 L2 cache controller implements three types of Clean &
  1106. Invalidate maintenance operations: by Physical Address
  1107. (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
  1108. They are architecturally defined to behave as the execution of a
  1109. clean operation followed immediately by an invalidate operation,
  1110. both performing to the same memory location. This functionality
  1111. is not correctly implemented in PL310 as clean lines are not
  1112. invalidated as a result of these operations.
  1113. config ARM_ERRATA_720789
  1114. bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
  1115. depends on CPU_V7
  1116. help
  1117. This option enables the workaround for the 720789 Cortex-A9 (prior to
  1118. r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
  1119. broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
  1120. As a consequence of this erratum, some TLB entries which should be
  1121. invalidated are not, resulting in an incoherency in the system page
  1122. tables. The workaround changes the TLB flushing routines to invalidate
  1123. entries regardless of the ASID.
  1124. config PL310_ERRATA_727915
  1125. bool "PL310 errata: Background Clean & Invalidate by Way operation can cause data corruption"
  1126. depends on CACHE_L2X0
  1127. help
  1128. PL310 implements the Clean & Invalidate by Way L2 cache maintenance
  1129. operation (offset 0x7FC). This operation runs in background so that
  1130. PL310 can handle normal accesses while it is in progress. Under very
  1131. rare circumstances, due to this erratum, write data can be lost when
  1132. PL310 treats a cacheable write transaction during a Clean &
  1133. Invalidate by Way operation.
  1134. config ARM_ERRATA_743622
  1135. bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
  1136. depends on CPU_V7
  1137. depends on !ARCH_MULTIPLATFORM
  1138. help
  1139. This option enables the workaround for the 743622 Cortex-A9
  1140. (r2p*) erratum. Under very rare conditions, a faulty
  1141. optimisation in the Cortex-A9 Store Buffer may lead to data
  1142. corruption. This workaround sets a specific bit in the diagnostic
  1143. register of the Cortex-A9 which disables the Store Buffer
  1144. optimisation, preventing the defect from occurring. This has no
  1145. visible impact on the overall performance or power consumption of the
  1146. processor.
  1147. config ARM_ERRATA_751472
  1148. bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
  1149. depends on CPU_V7
  1150. depends on !ARCH_MULTIPLATFORM
  1151. help
  1152. This option enables the workaround for the 751472 Cortex-A9 (prior
  1153. to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
  1154. completion of a following broadcasted operation if the second
  1155. operation is received by a CPU before the ICIALLUIS has completed,
  1156. potentially leading to corrupted entries in the cache or TLB.
  1157. config PL310_ERRATA_753970
  1158. bool "PL310 errata: cache sync operation may be faulty"
  1159. depends on CACHE_PL310
  1160. help
  1161. This option enables the workaround for the 753970 PL310 (r3p0) erratum.
  1162. Under some condition the effect of cache sync operation on
  1163. the store buffer still remains when the operation completes.
  1164. This means that the store buffer is always asked to drain and
  1165. this prevents it from merging any further writes. The workaround
  1166. is to replace the normal offset of cache sync operation (0x730)
  1167. by another offset targeting an unmapped PL310 register 0x740.
  1168. This has the same effect as the cache sync operation: store buffer
  1169. drain and waiting for all buffers empty.
  1170. config ARM_ERRATA_754322
  1171. bool "ARM errata: possible faulty MMU translations following an ASID switch"
  1172. depends on CPU_V7
  1173. help
  1174. This option enables the workaround for the 754322 Cortex-A9 (r2p*,
  1175. r3p*) erratum. A speculative memory access may cause a page table walk
  1176. which starts prior to an ASID switch but completes afterwards. This
  1177. can populate the micro-TLB with a stale entry which may be hit with
  1178. the new ASID. This workaround places two dsb instructions in the mm
  1179. switching code so that no page table walks can cross the ASID switch.
  1180. config ARM_ERRATA_754327
  1181. bool "ARM errata: no automatic Store Buffer drain"
  1182. depends on CPU_V7 && SMP
  1183. help
  1184. This option enables the workaround for the 754327 Cortex-A9 (prior to
  1185. r2p0) erratum. The Store Buffer does not have any automatic draining
  1186. mechanism and therefore a livelock may occur if an external agent
  1187. continuously polls a memory location waiting to observe an update.
  1188. This workaround defines cpu_relax() as smp_mb(), preventing correctly
  1189. written polling loops from denying visibility of updates to memory.
  1190. config ARM_ERRATA_364296
  1191. bool "ARM errata: Possible cache data corruption with hit-under-miss enabled"
  1192. depends on CPU_V6 && !SMP
  1193. help
  1194. This options enables the workaround for the 364296 ARM1136
  1195. r0p2 erratum (possible cache data corruption with
  1196. hit-under-miss enabled). It sets the undocumented bit 31 in
  1197. the auxiliary control register and the FI bit in the control
  1198. register, thus disabling hit-under-miss without putting the
  1199. processor into full low interrupt latency mode. ARM11MPCore
  1200. is not affected.
  1201. config ARM_ERRATA_764369
  1202. bool "ARM errata: Data cache line maintenance operation by MVA may not succeed"
  1203. depends on CPU_V7 && SMP
  1204. help
  1205. This option enables the workaround for erratum 764369
  1206. affecting Cortex-A9 MPCore with two or more processors (all
  1207. current revisions). Under certain timing circumstances, a data
  1208. cache line maintenance operation by MVA targeting an Inner
  1209. Shareable memory region may fail to proceed up to either the
  1210. Point of Coherency or to the Point of Unification of the
  1211. system. This workaround adds a DSB instruction before the
  1212. relevant cache maintenance functions and sets a specific bit
  1213. in the diagnostic control register of the SCU.
  1214. config PL310_ERRATA_769419
  1215. bool "PL310 errata: no automatic Store Buffer drain"
  1216. depends on CACHE_L2X0
  1217. help
  1218. On revisions of the PL310 prior to r3p2, the Store Buffer does
  1219. not automatically drain. This can cause normal, non-cacheable
  1220. writes to be retained when the memory system is idle, leading
  1221. to suboptimal I/O performance for drivers using coherent DMA.
  1222. This option adds a write barrier to the cpu_idle loop so that,
  1223. on systems with an outer cache, the store buffer is drained
  1224. explicitly.
  1225. config ARM_ERRATA_775420
  1226. bool "ARM errata: A data cache maintenance operation which aborts, might lead to deadlock"
  1227. depends on CPU_V7
  1228. help
  1229. This option enables the workaround for the 775420 Cortex-A9 (r2p2,
  1230. r2p6,r2p8,r2p10,r3p0) erratum. In case a date cache maintenance
  1231. operation aborts with MMU exception, it might cause the processor
  1232. to deadlock. This workaround puts DSB before executing ISB if
  1233. an abort may occur on cache maintenance.
  1234. endmenu
  1235. source "arch/arm/common/Kconfig"
  1236. menu "Bus support"
  1237. config ARM_AMBA
  1238. bool
  1239. config ISA
  1240. bool
  1241. help
  1242. Find out whether you have ISA slots on your motherboard. ISA is the
  1243. name of a bus system, i.e. the way the CPU talks to the other stuff
  1244. inside your box. Other bus systems are PCI, EISA, MicroChannel
  1245. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  1246. newer boards don't support it. If you have ISA, say Y, otherwise N.
  1247. # Select ISA DMA controller support
  1248. config ISA_DMA
  1249. bool
  1250. select ISA_DMA_API
  1251. config ARCH_NO_VIRT_TO_BUS
  1252. def_bool y
  1253. depends on !ARCH_RPC && !ARCH_NETWINDER && !ARCH_SHARK
  1254. # Select ISA DMA interface
  1255. config ISA_DMA_API
  1256. bool
  1257. config PCI
  1258. bool "PCI support" if MIGHT_HAVE_PCI
  1259. help
  1260. Find out whether you have a PCI motherboard. PCI is the name of a
  1261. bus system, i.e. the way the CPU talks to the other stuff inside
  1262. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  1263. VESA. If you have PCI, say Y, otherwise N.
  1264. config PCI_DOMAINS
  1265. bool
  1266. depends on PCI
  1267. config PCI_NANOENGINE
  1268. bool "BSE nanoEngine PCI support"
  1269. depends on SA1100_NANOENGINE
  1270. help
  1271. Enable PCI on the BSE nanoEngine board.
  1272. config PCI_SYSCALL
  1273. def_bool PCI
  1274. # Select the host bridge type
  1275. config PCI_HOST_VIA82C505
  1276. bool
  1277. depends on PCI && ARCH_SHARK
  1278. default y
  1279. config PCI_HOST_ITE8152
  1280. bool
  1281. depends on PCI && MACH_ARMCORE
  1282. default y
  1283. select DMABOUNCE
  1284. source "drivers/pci/Kconfig"
  1285. source "drivers/pcmcia/Kconfig"
  1286. endmenu
  1287. menu "Kernel Features"
  1288. config HAVE_SMP
  1289. bool
  1290. help
  1291. This option should be selected by machines which have an SMP-
  1292. capable CPU.
  1293. The only effect of this option is to make the SMP-related
  1294. options available to the user for configuration.
  1295. config SMP
  1296. bool "Symmetric Multi-Processing"
  1297. depends on CPU_V6K || CPU_V7
  1298. depends on GENERIC_CLOCKEVENTS
  1299. depends on HAVE_SMP
  1300. depends on MMU
  1301. select HAVE_ARM_SCU if !ARCH_MSM_SCORPIONMP
  1302. select USE_GENERIC_SMP_HELPERS
  1303. help
  1304. This enables support for systems with more than one CPU. If you have
  1305. a system with only one CPU, like most personal computers, say N. If
  1306. you have a system with more than one CPU, say Y.
  1307. If you say N here, the kernel will run on single and multiprocessor
  1308. machines, but will use only one CPU of a multiprocessor machine. If
  1309. you say Y here, the kernel will run on many, but not all, single
  1310. processor machines. On a single processor machine, the kernel will
  1311. run faster if you say N here.
  1312. See also <file:Documentation/x86/i386/IO-APIC.txt>,
  1313. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  1314. <http://tldp.org/HOWTO/SMP-HOWTO.html>.
  1315. If you don't know what to do here, say N.
  1316. config SMP_ON_UP
  1317. bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
  1318. depends on SMP && !XIP_KERNEL
  1319. default y
  1320. help
  1321. SMP kernels contain instructions which fail on non-SMP processors.
  1322. Enabling this option allows the kernel to modify itself to make
  1323. these instructions safe. Disabling it allows about 1K of space
  1324. savings.
  1325. If you don't know what to do here, say Y.
  1326. config ARM_CPU_TOPOLOGY
  1327. bool "Support cpu topology definition"
  1328. depends on SMP && CPU_V7
  1329. default y
  1330. help
  1331. Support ARM cpu topology definition. The MPIDR register defines
  1332. affinity between processors which is then used to describe the cpu
  1333. topology of an ARM System.
  1334. config SCHED_MC
  1335. bool "Multi-core scheduler support"
  1336. depends on ARM_CPU_TOPOLOGY
  1337. help
  1338. Multi-core scheduler support improves the CPU scheduler's decision
  1339. making when dealing with multi-core CPU chips at a cost of slightly
  1340. increased overhead in some places. If unsure say N here.
  1341. config SCHED_SMT
  1342. bool "SMT scheduler support"
  1343. depends on ARM_CPU_TOPOLOGY
  1344. help
  1345. Improves the CPU scheduler's decision making when dealing with
  1346. MultiThreading at a cost of slightly increased overhead in some
  1347. places. If unsure say N here.
  1348. config HAVE_ARM_SCU
  1349. bool
  1350. help
  1351. This option enables support for the ARM system coherency unit
  1352. config HAVE_ARM_ARCH_TIMER
  1353. bool "Architected timer support"
  1354. depends on CPU_V7
  1355. select ARM_ARCH_TIMER
  1356. help
  1357. This option enables support for the ARM architected timer
  1358. config HAVE_ARM_TWD
  1359. bool
  1360. depends on SMP
  1361. help
  1362. This options enables support for the ARM timer and watchdog unit
  1363. choice
  1364. prompt "Memory split"
  1365. default VMSPLIT_3G
  1366. help
  1367. Select the desired split between kernel and user memory.
  1368. If you are not absolutely sure what you are doing, leave this
  1369. option alone!
  1370. config VMSPLIT_3G
  1371. bool "3G/1G user/kernel split"
  1372. config VMSPLIT_2G
  1373. bool "2G/2G user/kernel split"
  1374. config VMSPLIT_1G
  1375. bool "1G/3G user/kernel split"
  1376. endchoice
  1377. config PAGE_OFFSET
  1378. hex
  1379. default 0x40000000 if VMSPLIT_1G
  1380. default 0x80000000 if VMSPLIT_2G
  1381. default 0xC0000000
  1382. config NR_CPUS
  1383. int "Maximum number of CPUs (2-32)"
  1384. range 2 32
  1385. depends on SMP
  1386. default "4"
  1387. config HOTPLUG_CPU
  1388. bool "Support for hot-pluggable CPUs"
  1389. depends on SMP && HOTPLUG
  1390. help
  1391. Say Y here to experiment with turning CPUs off and on. CPUs
  1392. can be controlled through /sys/devices/system/cpu.
  1393. config ARM_PSCI
  1394. bool "Support for the ARM Power State Coordination Interface (PSCI)"
  1395. depends on CPU_V7
  1396. help
  1397. Say Y here if you want Linux to communicate with system firmware
  1398. implementing the PSCI specification for CPU-centric power
  1399. management operations described in ARM document number ARM DEN
  1400. 0022A ("Power State Coordination Interface System Software on
  1401. ARM processors").
  1402. config LOCAL_TIMERS
  1403. bool "Use local timer interrupts"
  1404. depends on SMP
  1405. default y
  1406. select HAVE_ARM_TWD if (!ARCH_MSM_SCORPIONMP && !EXYNOS4_MCT)
  1407. help
  1408. Enable support for local timers on SMP platforms, rather then the
  1409. legacy IPI broadcast method. Local timers allows the system
  1410. accounting to be spread across the timer interval, preventing a
  1411. "thundering herd" at every timer tick.
  1412. config ARCH_NR_GPIO
  1413. int
  1414. default 1024 if ARCH_SHMOBILE || ARCH_TEGRA
  1415. default 355 if ARCH_U8500
  1416. default 264 if MACH_H4700
  1417. default 512 if SOC_OMAP5
  1418. default 288 if ARCH_VT8500 || ARCH_SUNXI
  1419. default 0
  1420. help
  1421. Maximum number of GPIOs in the system.
  1422. If unsure, leave the default value.
  1423. source kernel/Kconfig.preempt
  1424. config HZ
  1425. int
  1426. default 200 if ARCH_EBSA110 || ARCH_S3C24XX || ARCH_S5P64X0 || \
  1427. ARCH_S5PV210 || ARCH_EXYNOS4
  1428. default AT91_TIMER_HZ if ARCH_AT91
  1429. default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
  1430. default 100
  1431. config SCHED_HRTICK
  1432. def_bool HIGH_RES_TIMERS
  1433. config THUMB2_KERNEL
  1434. bool "Compile the kernel in Thumb-2 mode"
  1435. depends on CPU_V7 && !CPU_V6 && !CPU_V6K
  1436. select AEABI
  1437. select ARM_ASM_UNIFIED
  1438. select ARM_UNWIND
  1439. help
  1440. By enabling this option, the kernel will be compiled in
  1441. Thumb-2 mode. A compiler/assembler that understand the unified
  1442. ARM-Thumb syntax is needed.
  1443. If unsure, say N.
  1444. config THUMB2_AVOID_R_ARM_THM_JUMP11
  1445. bool "Work around buggy Thumb-2 short branch relocations in gas"
  1446. depends on THUMB2_KERNEL && MODULES
  1447. default y
  1448. help
  1449. Various binutils versions can resolve Thumb-2 branches to
  1450. locally-defined, preemptible global symbols as short-range "b.n"
  1451. branch instructions.
  1452. This is a problem, because there's no guarantee the final
  1453. destination of the symbol, or any candidate locations for a
  1454. trampoline, are within range of the branch. For this reason, the
  1455. kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
  1456. relocation in modules at all, and it makes little sense to add
  1457. support.
  1458. The symptom is that the kernel fails with an "unsupported
  1459. relocation" error when loading some modules.
  1460. Until fixed tools are available, passing
  1461. -fno-optimize-sibling-calls to gcc should prevent gcc generating
  1462. code which hits this problem, at the cost of a bit of extra runtime
  1463. stack usage in some cases.
  1464. The problem is described in more detail at:
  1465. https://bugs.launchpad.net/binutils-linaro/+bug/725126
  1466. Only Thumb-2 kernels are affected.
  1467. Unless you are sure your tools don't have this problem, say Y.
  1468. config ARM_ASM_UNIFIED
  1469. bool
  1470. config AEABI
  1471. bool "Use the ARM EABI to compile the kernel"
  1472. help
  1473. This option allows for the kernel to be compiled using the latest
  1474. ARM ABI (aka EABI). This is only useful if you are using a user
  1475. space environment that is also compiled with EABI.
  1476. Since there are major incompatibilities between the legacy ABI and
  1477. EABI, especially with regard to structure member alignment, this
  1478. option also changes the kernel syscall calling convention to
  1479. disambiguate both ABIs and allow for backward compatibility support
  1480. (selected with CONFIG_OABI_COMPAT).
  1481. To use this you need GCC version 4.0.0 or later.
  1482. config OABI_COMPAT
  1483. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  1484. depends on AEABI && !THUMB2_KERNEL
  1485. default y
  1486. help
  1487. This option preserves the old syscall interface along with the
  1488. new (ARM EABI) one. It also provides a compatibility layer to
  1489. intercept syscalls that have structure arguments which layout
  1490. in memory differs between the legacy ABI and the new ARM EABI
  1491. (only for non "thumb" binaries). This option adds a tiny
  1492. overhead to all syscalls and produces a slightly larger kernel.
  1493. If you know you'll be using only pure EABI user space then you
  1494. can say N here. If this option is not selected and you attempt
  1495. to execute a legacy ABI binary then the result will be
  1496. UNPREDICTABLE (in fact it can be predicted that it won't work
  1497. at all). If in doubt say Y.
  1498. config ARCH_HAS_HOLES_MEMORYMODEL
  1499. bool
  1500. config ARCH_SPARSEMEM_ENABLE
  1501. bool
  1502. config ARCH_SPARSEMEM_DEFAULT
  1503. def_bool ARCH_SPARSEMEM_ENABLE
  1504. config ARCH_SELECT_MEMORY_MODEL
  1505. def_bool ARCH_SPARSEMEM_ENABLE
  1506. config HAVE_ARCH_PFN_VALID
  1507. def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
  1508. config HIGHMEM
  1509. bool "High Memory Support"
  1510. depends on MMU
  1511. help
  1512. The address space of ARM processors is only 4 Gigabytes large
  1513. and it has to accommodate user address space, kernel address
  1514. space as well as some memory mapped IO. That means that, if you
  1515. have a large amount of physical memory and/or IO, not all of the
  1516. memory can be "permanently mapped" by the kernel. The physical
  1517. memory that is not permanently mapped is called "high memory".
  1518. Depending on the selected kernel/user memory split, minimum
  1519. vmalloc space and actual amount of RAM, you may not need this
  1520. option which should result in a slightly faster kernel.
  1521. If unsure, say n.
  1522. config HIGHPTE
  1523. bool "Allocate 2nd-level pagetables from highmem"
  1524. depends on HIGHMEM
  1525. config HW_PERF_EVENTS
  1526. bool "Enable hardware performance counter support for perf events"
  1527. depends on PERF_EVENTS
  1528. default y
  1529. help
  1530. Enable hardware performance counter support for perf events. If
  1531. disabled, perf events will use software events only.
  1532. source "mm/Kconfig"
  1533. config FORCE_MAX_ZONEORDER
  1534. int "Maximum zone order" if ARCH_SHMOBILE
  1535. range 11 64 if ARCH_SHMOBILE
  1536. default "12" if SOC_AM33XX
  1537. default "9" if SA1111
  1538. default "11"
  1539. help
  1540. The kernel memory allocator divides physically contiguous memory
  1541. blocks into "zones", where each zone is a power of two number of
  1542. pages. This option selects the largest power of two that the kernel
  1543. keeps in the memory allocator. If you need to allocate very large
  1544. blocks of physically contiguous memory, then you may need to
  1545. increase this value.
  1546. This config option is actually maximum order plus one. For example,
  1547. a value of 11 means that the largest free memory block is 2^10 pages.
  1548. config ALIGNMENT_TRAP
  1549. bool
  1550. depends on CPU_CP15_MMU
  1551. default y if !ARCH_EBSA110
  1552. select HAVE_PROC_CPU if PROC_FS
  1553. help
  1554. ARM processors cannot fetch/store information which is not
  1555. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  1556. address divisible by 4. On 32-bit ARM processors, these non-aligned
  1557. fetch/store instructions will be emulated in software if you say
  1558. here, which has a severe performance impact. This is necessary for
  1559. correct operation of some network protocols. With an IP-only
  1560. configuration it is safe to say N, otherwise say Y.
  1561. config UACCESS_WITH_MEMCPY
  1562. bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user()"
  1563. depends on MMU
  1564. default y if CPU_FEROCEON
  1565. help
  1566. Implement faster copy_to_user and clear_user methods for CPU
  1567. cores where a 8-word STM instruction give significantly higher
  1568. memory write throughput than a sequence of individual 32bit stores.
  1569. A possible side effect is a slight increase in scheduling latency
  1570. between threads sharing the same address space if they invoke
  1571. such copy operations with large buffers.
  1572. However, if the CPU data cache is using a write-allocate mode,
  1573. this option is unlikely to provide any performance gain.
  1574. config SECCOMP
  1575. bool
  1576. prompt "Enable seccomp to safely compute untrusted bytecode"
  1577. ---help---
  1578. This kernel feature is useful for number crunching applications
  1579. that may need to compute untrusted bytecode during their
  1580. execution. By using pipes or other transports made available to
  1581. the process as file descriptors supporting the read/write
  1582. syscalls, it's possible to isolate those applications in
  1583. their own address space using seccomp. Once seccomp is
  1584. enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
  1585. and the task is only allowed to execute a few safe syscalls
  1586. defined by each seccomp mode.
  1587. config CC_STACKPROTECTOR
  1588. bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
  1589. help
  1590. This option turns on the -fstack-protector GCC feature. This
  1591. feature puts, at the beginning of functions, a canary value on
  1592. the stack just before the return address, and validates
  1593. the value just before actually returning. Stack based buffer
  1594. overflows (that need to overwrite this return address) now also
  1595. overwrite the canary, which gets detected and the attack is then
  1596. neutralized via a kernel panic.
  1597. This feature requires gcc version 4.2 or above.
  1598. config XEN_DOM0
  1599. def_bool y
  1600. depends on XEN
  1601. config XEN
  1602. bool "Xen guest support on ARM (EXPERIMENTAL)"
  1603. depends on ARM && OF
  1604. depends on CPU_V7 && !CPU_V6
  1605. help
  1606. Say Y if you want to run Linux in a Virtual Machine on Xen on ARM.
  1607. endmenu
  1608. menu "Boot options"
  1609. config USE_OF
  1610. bool "Flattened Device Tree support"
  1611. select IRQ_DOMAIN
  1612. select OF
  1613. select OF_EARLY_FLATTREE
  1614. help
  1615. Include support for flattened device tree machine descriptions.
  1616. config ATAGS
  1617. bool "Support for the traditional ATAGS boot data passing" if USE_OF
  1618. default y
  1619. help
  1620. This is the traditional way of passing data to the kernel at boot
  1621. time. If you are solely relying on the flattened device tree (or
  1622. the ARM_ATAG_DTB_COMPAT option) then you may unselect this option
  1623. to remove ATAGS support from your kernel binary. If unsure,
  1624. leave this to y.
  1625. config DEPRECATED_PARAM_STRUCT
  1626. bool "Provide old way to pass kernel parameters"
  1627. depends on ATAGS
  1628. help
  1629. This was deprecated in 2001 and announced to live on for 5 years.
  1630. Some old boot loaders still use this way.
  1631. # Compressed boot loader in ROM. Yes, we really want to ask about
  1632. # TEXT and BSS so we preserve their values in the config files.
  1633. config ZBOOT_ROM_TEXT
  1634. hex "Compressed ROM boot loader base address"
  1635. default "0"
  1636. help
  1637. The physical address at which the ROM-able zImage is to be
  1638. placed in the target. Platforms which normally make use of
  1639. ROM-able zImage formats normally set this to a suitable
  1640. value in their defconfig file.
  1641. If ZBOOT_ROM is not enabled, this has no effect.
  1642. config ZBOOT_ROM_BSS
  1643. hex "Compressed ROM boot loader BSS address"
  1644. default "0"
  1645. help
  1646. The base address of an area of read/write memory in the target
  1647. for the ROM-able zImage which must be available while the
  1648. decompressor is running. It must be large enough to hold the
  1649. entire decompressed kernel plus an additional 128 KiB.
  1650. Platforms which normally make use of ROM-able zImage formats
  1651. normally set this to a suitable value in their defconfig file.
  1652. If ZBOOT_ROM is not enabled, this has no effect.
  1653. config ZBOOT_ROM
  1654. bool "Compressed boot loader in ROM/flash"
  1655. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  1656. help
  1657. Say Y here if you intend to execute your compressed kernel image
  1658. (zImage) directly from ROM or flash. If unsure, say N.
  1659. choice
  1660. prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)"
  1661. depends on ZBOOT_ROM && ARCH_SH7372
  1662. default ZBOOT_ROM_NONE
  1663. help
  1664. Include experimental SD/MMC loading code in the ROM-able zImage.
  1665. With this enabled it is possible to write the ROM-able zImage
  1666. kernel image to an MMC or SD card and boot the kernel straight
  1667. from the reset vector. At reset the processor Mask ROM will load
  1668. the first part of the ROM-able zImage which in turn loads the
  1669. rest the kernel image to RAM.
  1670. config ZBOOT_ROM_NONE
  1671. bool "No SD/MMC loader in zImage (EXPERIMENTAL)"
  1672. help
  1673. Do not load image from SD or MMC
  1674. config ZBOOT_ROM_MMCIF
  1675. bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
  1676. help
  1677. Load image from MMCIF hardware block.
  1678. config ZBOOT_ROM_SH_MOBILE_SDHI
  1679. bool "Include SuperH Mobile SDHI loader in zImage (EXPERIMENTAL)"
  1680. help
  1681. Load image from SDHI hardware block
  1682. endchoice
  1683. config ARM_APPENDED_DTB
  1684. bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
  1685. depends on OF && !ZBOOT_ROM
  1686. help
  1687. With this option, the boot code will look for a device tree binary
  1688. (DTB) appended to zImage
  1689. (e.g. cat zImage <filename>.dtb > zImage_w_dtb).
  1690. This is meant as a backward compatibility convenience for those
  1691. systems with a bootloader that can't be upgraded to accommodate
  1692. the documented boot protocol using a device tree.
  1693. Beware that there is very little in terms of protection against
  1694. this option being confused by leftover garbage in memory that might
  1695. look like a DTB header after a reboot if no actual DTB is appended
  1696. to zImage. Do not leave this option active in a production kernel
  1697. if you don't intend to always append a DTB. Proper passing of the
  1698. location into r2 of a bootloader provided DTB is always preferable
  1699. to this option.
  1700. config ARM_ATAG_DTB_COMPAT
  1701. bool "Supplement the appended DTB with traditional ATAG information"
  1702. depends on ARM_APPENDED_DTB
  1703. help
  1704. Some old bootloaders can't be updated to a DTB capable one, yet
  1705. they provide ATAGs with memory configuration, the ramdisk address,
  1706. the kernel cmdline string, etc. Such information is dynamically
  1707. provided by the bootloader and can't always be stored in a static
  1708. DTB. To allow a device tree enabled kernel to be used with such
  1709. bootloaders, this option allows zImage to extract the information
  1710. from the ATAG list and store it at run time into the appended DTB.
  1711. choice
  1712. prompt "Kernel command line type" if ARM_ATAG_DTB_COMPAT
  1713. default ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
  1714. config ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
  1715. bool "Use bootloader kernel arguments if available"
  1716. help
  1717. Uses the command-line options passed by the boot loader instead of
  1718. the device tree bootargs property. If the boot loader doesn't provide
  1719. any, the device tree bootargs property will be used.
  1720. config ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEND
  1721. bool "Extend with bootloader kernel arguments"
  1722. help
  1723. The command-line arguments provided by the boot loader will be
  1724. appended to the the device tree bootargs property.
  1725. endchoice
  1726. config CMDLINE
  1727. string "Default kernel command string"
  1728. default ""
  1729. help
  1730. On some architectures (EBSA110 and CATS), there is currently no way
  1731. for the boot loader to pass arguments to the kernel. For these
  1732. architectures, you should supply some command-line options at build
  1733. time by entering them here. As a minimum, you should specify the
  1734. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  1735. choice
  1736. prompt "Kernel command line type" if CMDLINE != ""
  1737. default CMDLINE_FROM_BOOTLOADER
  1738. depends on ATAGS
  1739. config CMDLINE_FROM_BOOTLOADER
  1740. bool "Use bootloader kernel arguments if available"
  1741. help
  1742. Uses the command-line options passed by the boot loader. If
  1743. the boot loader doesn't provide any, the default kernel command
  1744. string provided in CMDLINE will be used.
  1745. config CMDLINE_EXTEND
  1746. bool "Extend bootloader kernel arguments"
  1747. help
  1748. The command-line arguments provided by the boot loader will be
  1749. appended to the default kernel command string.
  1750. config CMDLINE_FORCE
  1751. bool "Always use the default kernel command string"
  1752. help
  1753. Always use the default kernel command string, even if the boot
  1754. loader passes other arguments to the kernel.
  1755. This is useful if you cannot or don't want to change the
  1756. command-line options your boot loader passes to the kernel.
  1757. endchoice
  1758. config XIP_KERNEL
  1759. bool "Kernel Execute-In-Place from ROM"
  1760. depends on !ZBOOT_ROM && !ARM_LPAE && !ARCH_MULTIPLATFORM
  1761. help
  1762. Execute-In-Place allows the kernel to run from non-volatile storage
  1763. directly addressable by the CPU, such as NOR flash. This saves RAM
  1764. space since the text section of the kernel is not loaded from flash
  1765. to RAM. Read-write sections, such as the data section and stack,
  1766. are still copied to RAM. The XIP kernel is not compressed since
  1767. it has to run directly from flash, so it will take more space to
  1768. store it. The flash address used to link the kernel object files,
  1769. and for storing it, is configuration dependent. Therefore, if you
  1770. say Y here, you must know the proper physical address where to
  1771. store the kernel image depending on your own flash memory usage.
  1772. Also note that the make target becomes "make xipImage" rather than
  1773. "make zImage" or "make Image". The final kernel binary to put in
  1774. ROM memory will be arch/arm/boot/xipImage.
  1775. If unsure, say N.
  1776. config XIP_PHYS_ADDR
  1777. hex "XIP Kernel Physical Location"
  1778. depends on XIP_KERNEL
  1779. default "0x00080000"
  1780. help
  1781. This is the physical address in your flash memory the kernel will
  1782. be linked for and stored to. This address is dependent on your
  1783. own flash usage.
  1784. config KEXEC
  1785. bool "Kexec system call (EXPERIMENTAL)"
  1786. depends on (!SMP || HOTPLUG_CPU)
  1787. help
  1788. kexec is a system call that implements the ability to shutdown your
  1789. current kernel, and to start another kernel. It is like a reboot
  1790. but it is independent of the system firmware. And like a reboot
  1791. you can start any kernel with it, not just Linux.
  1792. It is an ongoing process to be certain the hardware in a machine
  1793. is properly shutdown, so do not be surprised if this code does not
  1794. initially work for you. It may help to enable device hotplugging
  1795. support.
  1796. config ATAGS_PROC
  1797. bool "Export atags in procfs"
  1798. depends on ATAGS && KEXEC
  1799. default y
  1800. help
  1801. Should the atags used to boot the kernel be exported in an "atags"
  1802. file in procfs. Useful with kexec.
  1803. config CRASH_DUMP
  1804. bool "Build kdump crash kernel (EXPERIMENTAL)"
  1805. help
  1806. Generate crash dump after being started by kexec. This should
  1807. be normally only set in special crash dump kernels which are
  1808. loaded in the main kernel with kexec-tools into a specially
  1809. reserved region and then later executed after a crash by
  1810. kdump/kexec. The crash dump kernel must be compiled to a
  1811. memory address not used by the main kernel
  1812. For more details see Documentation/kdump/kdump.txt
  1813. config AUTO_ZRELADDR
  1814. bool "Auto calculation of the decompressed kernel image address"
  1815. depends on !ZBOOT_ROM && !ARCH_U300
  1816. help
  1817. ZRELADDR is the physical address where the decompressed kernel
  1818. image will be placed. If AUTO_ZRELADDR is selected, the address
  1819. will be determined at run-time by masking the current IP with
  1820. 0xf8000000. This assumes the zImage being placed in the first 128MB
  1821. from start of memory.
  1822. endmenu
  1823. menu "CPU Power Management"
  1824. if ARCH_HAS_CPUFREQ
  1825. source "drivers/cpufreq/Kconfig"
  1826. config CPU_FREQ_IMX
  1827. tristate "CPUfreq driver for i.MX CPUs"
  1828. depends on ARCH_MXC && CPU_FREQ
  1829. select CPU_FREQ_TABLE
  1830. help
  1831. This enables the CPUfreq driver for i.MX CPUs.
  1832. config CPU_FREQ_SA1100
  1833. bool
  1834. config CPU_FREQ_SA1110
  1835. bool
  1836. config CPU_FREQ_INTEGRATOR
  1837. tristate "CPUfreq driver for ARM Integrator CPUs"
  1838. depends on ARCH_INTEGRATOR && CPU_FREQ
  1839. default y
  1840. help
  1841. This enables the CPUfreq driver for ARM Integrator CPUs.
  1842. For details, take a look at <file:Documentation/cpu-freq>.
  1843. If in doubt, say Y.
  1844. config CPU_FREQ_PXA
  1845. bool
  1846. depends on CPU_FREQ && ARCH_PXA && PXA25x
  1847. default y
  1848. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  1849. select CPU_FREQ_TABLE
  1850. config CPU_FREQ_S3C
  1851. bool
  1852. help
  1853. Internal configuration node for common cpufreq on Samsung SoC
  1854. config CPU_FREQ_S3C24XX
  1855. bool "CPUfreq driver for Samsung S3C24XX series CPUs (EXPERIMENTAL)"
  1856. depends on ARCH_S3C24XX && CPU_FREQ
  1857. select CPU_FREQ_S3C
  1858. help
  1859. This enables the CPUfreq driver for the Samsung S3C24XX family
  1860. of CPUs.
  1861. For details, take a look at <file:Documentation/cpu-freq>.
  1862. If in doubt, say N.
  1863. config CPU_FREQ_S3C24XX_PLL
  1864. bool "Support CPUfreq changing of PLL frequency (EXPERIMENTAL)"
  1865. depends on CPU_FREQ_S3C24XX
  1866. help
  1867. Compile in support for changing the PLL frequency from the
  1868. S3C24XX series CPUfreq driver. The PLL takes time to settle
  1869. after a frequency change, so by default it is not enabled.
  1870. This also means that the PLL tables for the selected CPU(s) will
  1871. be built which may increase the size of the kernel image.
  1872. config CPU_FREQ_S3C24XX_DEBUG
  1873. bool "Debug CPUfreq Samsung driver core"
  1874. depends on CPU_FREQ_S3C24XX
  1875. help
  1876. Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
  1877. config CPU_FREQ_S3C24XX_IODEBUG
  1878. bool "Debug CPUfreq Samsung driver IO timing"
  1879. depends on CPU_FREQ_S3C24XX
  1880. help
  1881. Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
  1882. config CPU_FREQ_S3C24XX_DEBUGFS
  1883. bool "Export debugfs for CPUFreq"
  1884. depends on CPU_FREQ_S3C24XX && DEBUG_FS
  1885. help
  1886. Export status information via debugfs.
  1887. endif
  1888. source "drivers/cpuidle/Kconfig"
  1889. endmenu
  1890. menu "Floating point emulation"
  1891. comment "At least one emulation must be selected"
  1892. config FPE_NWFPE
  1893. bool "NWFPE math emulation"
  1894. depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
  1895. ---help---
  1896. Say Y to include the NWFPE floating point emulator in the kernel.
  1897. This is necessary to run most binaries. Linux does not currently
  1898. support floating point hardware so you need to say Y here even if
  1899. your machine has an FPA or floating point co-processor podule.
  1900. You may say N here if you are going to load the Acorn FPEmulator
  1901. early in the bootup.
  1902. config FPE_NWFPE_XP
  1903. bool "Support extended precision"
  1904. depends on FPE_NWFPE
  1905. help
  1906. Say Y to include 80-bit support in the kernel floating-point
  1907. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  1908. Note that gcc does not generate 80-bit operations by default,
  1909. so in most cases this option only enlarges the size of the
  1910. floating point emulator without any good reason.
  1911. You almost surely want to say N here.
  1912. config FPE_FASTFPE
  1913. bool "FastFPE math emulation (EXPERIMENTAL)"
  1914. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3
  1915. ---help---
  1916. Say Y here to include the FAST floating point emulator in the kernel.
  1917. This is an experimental much faster emulator which now also has full
  1918. precision for the mantissa. It does not support any exceptions.
  1919. It is very simple, and approximately 3-6 times faster than NWFPE.
  1920. It should be sufficient for most programs. It may be not suitable
  1921. for scientific calculations, but you have to check this for yourself.
  1922. If you do not feel you need a faster FP emulation you should better
  1923. choose NWFPE.
  1924. config VFP
  1925. bool "VFP-format floating point maths"
  1926. depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  1927. help
  1928. Say Y to include VFP support code in the kernel. This is needed
  1929. if your hardware includes a VFP unit.
  1930. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  1931. release notes and additional status information.
  1932. Say N if your target does not have VFP hardware.
  1933. config VFPv3
  1934. bool
  1935. depends on VFP
  1936. default y if CPU_V7
  1937. config NEON
  1938. bool "Advanced SIMD (NEON) Extension support"
  1939. depends on VFPv3 && CPU_V7
  1940. help
  1941. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  1942. Extension.
  1943. endmenu
  1944. menu "Userspace binary formats"
  1945. source "fs/Kconfig.binfmt"
  1946. config ARTHUR
  1947. tristate "RISC OS personality"
  1948. depends on !AEABI
  1949. help
  1950. Say Y here to include the kernel code necessary if you want to run
  1951. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  1952. experimental; if this sounds frightening, say N and sleep in peace.
  1953. You can also say M here to compile this support as a module (which
  1954. will be called arthur).
  1955. endmenu
  1956. menu "Power management options"
  1957. source "kernel/power/Kconfig"
  1958. config ARCH_SUSPEND_POSSIBLE
  1959. depends on !ARCH_S5PC100
  1960. depends on CPU_ARM920T || CPU_ARM926T || CPU_SA1100 || \
  1961. CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE || CPU_MOHAWK
  1962. def_bool y
  1963. config ARM_CPU_SUSPEND
  1964. def_bool PM_SLEEP
  1965. endmenu
  1966. source "net/Kconfig"
  1967. source "drivers/Kconfig"
  1968. source "fs/Kconfig"
  1969. source "arch/arm/Kconfig.debug"
  1970. source "security/Kconfig"
  1971. source "crypto/Kconfig"
  1972. source "lib/Kconfig"
  1973. source "arch/arm/kvm/Kconfig"