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_CLPS711X
  327. bool "Cirrus Logic CLPS711x/EP721x/EP731x-based"
  328. select ARCH_REQUIRE_GPIOLIB
  329. select AUTO_ZRELADDR
  330. select CLKDEV_LOOKUP
  331. select COMMON_CLK
  332. select CPU_ARM720T
  333. select GENERIC_CLOCKEVENTS
  334. select MULTI_IRQ_HANDLER
  335. select NEED_MACH_MEMORY_H
  336. select SPARSE_IRQ
  337. help
  338. Support for Cirrus Logic 711x/721x/731x based boards.
  339. config ARCH_GEMINI
  340. bool "Cortina Systems Gemini"
  341. select ARCH_REQUIRE_GPIOLIB
  342. select ARCH_USES_GETTIMEOFFSET
  343. select CPU_FA526
  344. help
  345. Support for the Cortina Systems Gemini family SoCs
  346. config ARCH_SIRF
  347. bool "CSR SiRF"
  348. select ARCH_REQUIRE_GPIOLIB
  349. select AUTO_ZRELADDR
  350. select COMMON_CLK
  351. select GENERIC_CLOCKEVENTS
  352. select GENERIC_IRQ_CHIP
  353. select MIGHT_HAVE_CACHE_L2X0
  354. select NO_IOPORT
  355. select PINCTRL
  356. select PINCTRL_SIRF
  357. select USE_OF
  358. help
  359. Support for CSR SiRFprimaII/Marco/Polo platforms
  360. config ARCH_EBSA110
  361. bool "EBSA-110"
  362. select ARCH_USES_GETTIMEOFFSET
  363. select CPU_SA110
  364. select ISA
  365. select NEED_MACH_IO_H
  366. select NEED_MACH_MEMORY_H
  367. select NO_IOPORT
  368. help
  369. This is an evaluation board for the StrongARM processor available
  370. from Digital. It has limited hardware on-board, including an
  371. Ethernet interface, two PCMCIA sockets, two serial ports and a
  372. parallel port.
  373. config ARCH_EP93XX
  374. bool "EP93xx-based"
  375. select ARCH_HAS_HOLES_MEMORYMODEL
  376. select ARCH_REQUIRE_GPIOLIB
  377. select ARCH_USES_GETTIMEOFFSET
  378. select ARM_AMBA
  379. select ARM_VIC
  380. select CLKDEV_LOOKUP
  381. select CPU_ARM920T
  382. select NEED_MACH_MEMORY_H
  383. help
  384. This enables support for the Cirrus EP93xx series of CPUs.
  385. config ARCH_FOOTBRIDGE
  386. bool "FootBridge"
  387. select CPU_SA110
  388. select FOOTBRIDGE
  389. select GENERIC_CLOCKEVENTS
  390. select HAVE_IDE
  391. select NEED_MACH_IO_H if !MMU
  392. select NEED_MACH_MEMORY_H
  393. help
  394. Support for systems based on the DC21285 companion chip
  395. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  396. config ARCH_MXS
  397. bool "Freescale MXS-based"
  398. select ARCH_REQUIRE_GPIOLIB
  399. select CLKDEV_LOOKUP
  400. select CLKSRC_MMIO
  401. select COMMON_CLK
  402. select GENERIC_CLOCKEVENTS
  403. select HAVE_CLK_PREPARE
  404. select MULTI_IRQ_HANDLER
  405. select PINCTRL
  406. select SPARSE_IRQ
  407. select USE_OF
  408. help
  409. Support for Freescale MXS-based family of processors
  410. config ARCH_NETX
  411. bool "Hilscher NetX based"
  412. select ARM_VIC
  413. select CLKSRC_MMIO
  414. select CPU_ARM926T
  415. select GENERIC_CLOCKEVENTS
  416. help
  417. This enables support for systems based on the Hilscher NetX Soc
  418. config ARCH_H720X
  419. bool "Hynix HMS720x-based"
  420. select ARCH_USES_GETTIMEOFFSET
  421. select CPU_ARM720T
  422. select ISA_DMA_API
  423. help
  424. This enables support for systems based on the Hynix HMS720x
  425. config ARCH_IOP13XX
  426. bool "IOP13xx-based"
  427. depends on MMU
  428. select ARCH_SUPPORTS_MSI
  429. select CPU_XSC3
  430. select NEED_MACH_MEMORY_H
  431. select NEED_RET_TO_USER
  432. select PCI
  433. select PLAT_IOP
  434. select VMSPLIT_1G
  435. help
  436. Support for Intel's IOP13XX (XScale) family of processors.
  437. config ARCH_IOP32X
  438. bool "IOP32x-based"
  439. depends on MMU
  440. select ARCH_REQUIRE_GPIOLIB
  441. select CPU_XSCALE
  442. select NEED_MACH_GPIO_H
  443. select NEED_RET_TO_USER
  444. select PCI
  445. select PLAT_IOP
  446. help
  447. Support for Intel's 80219 and IOP32X (XScale) family of
  448. processors.
  449. config ARCH_IOP33X
  450. bool "IOP33x-based"
  451. depends on MMU
  452. select ARCH_REQUIRE_GPIOLIB
  453. select CPU_XSCALE
  454. select NEED_MACH_GPIO_H
  455. select NEED_RET_TO_USER
  456. select PCI
  457. select PLAT_IOP
  458. help
  459. Support for Intel's IOP33X (XScale) family of processors.
  460. config ARCH_IXP4XX
  461. bool "IXP4xx-based"
  462. depends on MMU
  463. select ARCH_HAS_DMA_SET_COHERENT_MASK
  464. select ARCH_REQUIRE_GPIOLIB
  465. select CLKSRC_MMIO
  466. select CPU_XSCALE
  467. select DMABOUNCE if PCI
  468. select GENERIC_CLOCKEVENTS
  469. select MIGHT_HAVE_PCI
  470. select NEED_MACH_IO_H
  471. help
  472. Support for Intel's IXP4XX (XScale) family of processors.
  473. config ARCH_DOVE
  474. bool "Marvell Dove"
  475. select ARCH_REQUIRE_GPIOLIB
  476. select COMMON_CLK_DOVE
  477. select CPU_V7
  478. select GENERIC_CLOCKEVENTS
  479. select MIGHT_HAVE_PCI
  480. select PINCTRL
  481. select PINCTRL_DOVE
  482. select PLAT_ORION_LEGACY
  483. select USB_ARCH_HAS_EHCI
  484. help
  485. Support for the Marvell Dove SoC 88AP510
  486. config ARCH_KIRKWOOD
  487. bool "Marvell Kirkwood"
  488. select ARCH_REQUIRE_GPIOLIB
  489. select CPU_FEROCEON
  490. select GENERIC_CLOCKEVENTS
  491. select PCI
  492. select PCI_QUIRKS
  493. select PINCTRL
  494. select PINCTRL_KIRKWOOD
  495. select PLAT_ORION_LEGACY
  496. help
  497. Support for the following Marvell Kirkwood series SoCs:
  498. 88F6180, 88F6192 and 88F6281.
  499. config ARCH_MV78XX0
  500. bool "Marvell MV78xx0"
  501. select ARCH_REQUIRE_GPIOLIB
  502. select CPU_FEROCEON
  503. select GENERIC_CLOCKEVENTS
  504. select PCI
  505. select PLAT_ORION_LEGACY
  506. help
  507. Support for the following Marvell MV78xx0 series SoCs:
  508. MV781x0, MV782x0.
  509. config ARCH_ORION5X
  510. bool "Marvell Orion"
  511. depends on MMU
  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 Orion 5x series SoCs:
  519. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  520. Orion-2 (5281), Orion-1-90 (6183).
  521. config ARCH_MMP
  522. bool "Marvell PXA168/910/MMP2"
  523. depends on MMU
  524. select ARCH_REQUIRE_GPIOLIB
  525. select CLKDEV_LOOKUP
  526. select GENERIC_ALLOCATOR
  527. select GENERIC_CLOCKEVENTS
  528. select GPIO_PXA
  529. select IRQ_DOMAIN
  530. select NEED_MACH_GPIO_H
  531. select PINCTRL
  532. select PLAT_PXA
  533. select SPARSE_IRQ
  534. help
  535. Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
  536. config ARCH_KS8695
  537. bool "Micrel/Kendin KS8695"
  538. select ARCH_REQUIRE_GPIOLIB
  539. select CLKSRC_MMIO
  540. select CPU_ARM922T
  541. select GENERIC_CLOCKEVENTS
  542. select NEED_MACH_MEMORY_H
  543. help
  544. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  545. System-on-Chip devices.
  546. config ARCH_W90X900
  547. bool "Nuvoton W90X900 CPU"
  548. select ARCH_REQUIRE_GPIOLIB
  549. select CLKDEV_LOOKUP
  550. select CLKSRC_MMIO
  551. select CPU_ARM926T
  552. select GENERIC_CLOCKEVENTS
  553. help
  554. Support for Nuvoton (Winbond logic dept.) ARM9 processor,
  555. At present, the w90x900 has been renamed nuc900, regarding
  556. the ARM series product line, you can login the following
  557. link address to know more.
  558. <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
  559. ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
  560. config ARCH_LPC32XX
  561. bool "NXP LPC32XX"
  562. select ARCH_REQUIRE_GPIOLIB
  563. select ARM_AMBA
  564. select CLKDEV_LOOKUP
  565. select CLKSRC_MMIO
  566. select CPU_ARM926T
  567. select GENERIC_CLOCKEVENTS
  568. select HAVE_IDE
  569. select HAVE_PWM
  570. select USB_ARCH_HAS_OHCI
  571. select USE_OF
  572. help
  573. Support for the NXP LPC32XX family of processors
  574. config ARCH_TEGRA
  575. bool "NVIDIA Tegra"
  576. select ARCH_HAS_CPUFREQ
  577. select ARCH_REQUIRE_GPIOLIB
  578. select CLKDEV_LOOKUP
  579. select CLKSRC_MMIO
  580. select CLKSRC_OF
  581. select COMMON_CLK
  582. select GENERIC_CLOCKEVENTS
  583. select HAVE_CLK
  584. select HAVE_SMP
  585. select MIGHT_HAVE_CACHE_L2X0
  586. select SPARSE_IRQ
  587. select USE_OF
  588. help
  589. This enables support for NVIDIA Tegra based systems (Tegra APX,
  590. Tegra 6xx and Tegra 2 series).
  591. config ARCH_PXA
  592. bool "PXA2xx/PXA3xx-based"
  593. depends on MMU
  594. select ARCH_HAS_CPUFREQ
  595. select ARCH_MTD_XIP
  596. select ARCH_REQUIRE_GPIOLIB
  597. select ARM_CPU_SUSPEND if PM
  598. select AUTO_ZRELADDR
  599. select CLKDEV_LOOKUP
  600. select CLKSRC_MMIO
  601. select GENERIC_CLOCKEVENTS
  602. select GPIO_PXA
  603. select HAVE_IDE
  604. select MULTI_IRQ_HANDLER
  605. select NEED_MACH_GPIO_H
  606. select PLAT_PXA
  607. select SPARSE_IRQ
  608. help
  609. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  610. config ARCH_MSM
  611. bool "Qualcomm MSM"
  612. select ARCH_REQUIRE_GPIOLIB
  613. select CLKDEV_LOOKUP
  614. select GENERIC_CLOCKEVENTS
  615. select HAVE_CLK
  616. help
  617. Support for Qualcomm MSM/QSD based systems. This runs on the
  618. apps processor of the MSM/QSD and depends on a shared memory
  619. interface to the modem processor which runs the baseband
  620. stack and controls some vital subsystems
  621. (clock and power control, etc).
  622. config ARCH_SHMOBILE
  623. bool "Renesas SH-Mobile / R-Mobile"
  624. select CLKDEV_LOOKUP
  625. select GENERIC_CLOCKEVENTS
  626. select HAVE_CLK
  627. select HAVE_MACH_CLKDEV
  628. select HAVE_SMP
  629. select MIGHT_HAVE_CACHE_L2X0
  630. select MULTI_IRQ_HANDLER
  631. select NEED_MACH_MEMORY_H
  632. select NO_IOPORT
  633. select PINCTRL
  634. select PM_GENERIC_DOMAINS if PM
  635. select SPARSE_IRQ
  636. help
  637. Support for Renesas's SH-Mobile and R-Mobile ARM platforms.
  638. config ARCH_RPC
  639. bool "RiscPC"
  640. select ARCH_ACORN
  641. select ARCH_MAY_HAVE_PC_FDC
  642. select ARCH_SPARSEMEM_ENABLE
  643. select ARCH_USES_GETTIMEOFFSET
  644. select FIQ
  645. select HAVE_IDE
  646. select HAVE_PATA_PLATFORM
  647. select ISA_DMA_API
  648. select NEED_MACH_IO_H
  649. select NEED_MACH_MEMORY_H
  650. select NO_IOPORT
  651. help
  652. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  653. CD-ROM interface, serial and parallel port, and the floppy drive.
  654. config ARCH_SA1100
  655. bool "SA1100-based"
  656. select ARCH_HAS_CPUFREQ
  657. select ARCH_MTD_XIP
  658. select ARCH_REQUIRE_GPIOLIB
  659. select ARCH_SPARSEMEM_ENABLE
  660. select CLKDEV_LOOKUP
  661. select CLKSRC_MMIO
  662. select CPU_FREQ
  663. select CPU_SA1100
  664. select GENERIC_CLOCKEVENTS
  665. select HAVE_IDE
  666. select ISA
  667. select NEED_MACH_GPIO_H
  668. select NEED_MACH_MEMORY_H
  669. select SPARSE_IRQ
  670. help
  671. Support for StrongARM 11x0 based boards.
  672. config ARCH_S3C24XX
  673. bool "Samsung S3C24XX SoCs"
  674. select ARCH_HAS_CPUFREQ
  675. select ARCH_USES_GETTIMEOFFSET
  676. select CLKDEV_LOOKUP
  677. select HAVE_CLK
  678. select HAVE_S3C2410_I2C if I2C
  679. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  680. select HAVE_S3C_RTC if RTC_CLASS
  681. select NEED_MACH_GPIO_H
  682. select NEED_MACH_IO_H
  683. help
  684. Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443
  685. and S3C2450 SoCs based systems, such as the Simtec Electronics BAST
  686. (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or the
  687. Samsung SMDK2410 development board (and derivatives).
  688. config ARCH_S3C64XX
  689. bool "Samsung S3C64XX"
  690. select ARCH_HAS_CPUFREQ
  691. select ARCH_REQUIRE_GPIOLIB
  692. select ARCH_USES_GETTIMEOFFSET
  693. select ARM_VIC
  694. select CLKDEV_LOOKUP
  695. select CPU_V6
  696. select HAVE_CLK
  697. select HAVE_S3C2410_I2C if I2C
  698. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  699. select HAVE_TCM
  700. select NEED_MACH_GPIO_H
  701. select NO_IOPORT
  702. select PLAT_SAMSUNG
  703. select S3C_DEV_NAND
  704. select S3C_GPIO_TRACK
  705. select SAMSUNG_CLKSRC
  706. select SAMSUNG_GPIOLIB_4BIT
  707. select SAMSUNG_IRQ_VIC_TIMER
  708. select USB_ARCH_HAS_OHCI
  709. help
  710. Samsung S3C64XX series based systems
  711. config ARCH_S5P64X0
  712. bool "Samsung S5P6440 S5P6450"
  713. select CLKDEV_LOOKUP
  714. select CLKSRC_MMIO
  715. select CPU_V6
  716. select GENERIC_CLOCKEVENTS
  717. select HAVE_CLK
  718. select HAVE_S3C2410_I2C if I2C
  719. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  720. select HAVE_S3C_RTC if RTC_CLASS
  721. select NEED_MACH_GPIO_H
  722. help
  723. Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
  724. SMDK6450.
  725. config ARCH_S5PC100
  726. bool "Samsung S5PC100"
  727. select ARCH_USES_GETTIMEOFFSET
  728. select CLKDEV_LOOKUP
  729. select CPU_V7
  730. select HAVE_CLK
  731. select HAVE_S3C2410_I2C if I2C
  732. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  733. select HAVE_S3C_RTC if RTC_CLASS
  734. select NEED_MACH_GPIO_H
  735. help
  736. Samsung S5PC100 series based systems
  737. config ARCH_S5PV210
  738. bool "Samsung S5PV210/S5PC110"
  739. select ARCH_HAS_CPUFREQ
  740. select ARCH_HAS_HOLES_MEMORYMODEL
  741. select ARCH_SPARSEMEM_ENABLE
  742. select CLKDEV_LOOKUP
  743. select CLKSRC_MMIO
  744. select CPU_V7
  745. select GENERIC_CLOCKEVENTS
  746. select HAVE_CLK
  747. select HAVE_S3C2410_I2C if I2C
  748. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  749. select HAVE_S3C_RTC if RTC_CLASS
  750. select NEED_MACH_GPIO_H
  751. select NEED_MACH_MEMORY_H
  752. help
  753. Samsung S5PV210/S5PC110 series based systems
  754. config ARCH_EXYNOS
  755. bool "Samsung EXYNOS"
  756. select ARCH_HAS_CPUFREQ
  757. select ARCH_HAS_HOLES_MEMORYMODEL
  758. select ARCH_SPARSEMEM_ENABLE
  759. select CLKDEV_LOOKUP
  760. select CPU_V7
  761. select GENERIC_CLOCKEVENTS
  762. select HAVE_CLK
  763. select HAVE_S3C2410_I2C if I2C
  764. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  765. select HAVE_S3C_RTC if RTC_CLASS
  766. select NEED_MACH_GPIO_H
  767. select NEED_MACH_MEMORY_H
  768. help
  769. Support for SAMSUNG's EXYNOS SoCs (EXYNOS4/5)
  770. config ARCH_SHARK
  771. bool "Shark"
  772. select ARCH_USES_GETTIMEOFFSET
  773. select CPU_SA110
  774. select ISA
  775. select ISA_DMA
  776. select NEED_MACH_MEMORY_H
  777. select PCI
  778. select ZONE_DMA
  779. help
  780. Support for the StrongARM based Digital DNARD machine, also known
  781. as "Shark" (<http://www.shark-linux.de/shark.html>).
  782. config ARCH_U300
  783. bool "ST-Ericsson U300 Series"
  784. depends on MMU
  785. select ARCH_REQUIRE_GPIOLIB
  786. select ARM_AMBA
  787. select ARM_PATCH_PHYS_VIRT
  788. select ARM_VIC
  789. select CLKDEV_LOOKUP
  790. select CLKSRC_MMIO
  791. select COMMON_CLK
  792. select CPU_ARM926T
  793. select GENERIC_CLOCKEVENTS
  794. select HAVE_TCM
  795. select SPARSE_IRQ
  796. help
  797. Support for ST-Ericsson U300 series mobile platforms.
  798. config ARCH_U8500
  799. bool "ST-Ericsson U8500 Series"
  800. depends on MMU
  801. select ARCH_HAS_CPUFREQ
  802. select ARCH_REQUIRE_GPIOLIB
  803. select ARM_AMBA
  804. select CLKDEV_LOOKUP
  805. select CPU_V7
  806. select GENERIC_CLOCKEVENTS
  807. select HAVE_SMP
  808. select MIGHT_HAVE_CACHE_L2X0
  809. select SPARSE_IRQ
  810. help
  811. Support for ST-Ericsson's Ux500 architecture
  812. config ARCH_NOMADIK
  813. bool "STMicroelectronics Nomadik"
  814. select ARCH_REQUIRE_GPIOLIB
  815. select ARM_AMBA
  816. select ARM_VIC
  817. select CLKSRC_NOMADIK_MTU
  818. select COMMON_CLK
  819. select CPU_ARM926T
  820. select GENERIC_CLOCKEVENTS
  821. select MIGHT_HAVE_CACHE_L2X0
  822. select USE_OF
  823. select PINCTRL
  824. select PINCTRL_STN8815
  825. select SPARSE_IRQ
  826. help
  827. Support for the Nomadik platform by ST-Ericsson
  828. config PLAT_SPEAR
  829. bool "ST SPEAr"
  830. select ARCH_HAS_CPUFREQ
  831. select ARCH_REQUIRE_GPIOLIB
  832. select ARM_AMBA
  833. select CLKDEV_LOOKUP
  834. select CLKSRC_MMIO
  835. select COMMON_CLK
  836. select GENERIC_CLOCKEVENTS
  837. select HAVE_CLK
  838. help
  839. Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
  840. config ARCH_DAVINCI
  841. bool "TI DaVinci"
  842. select ARCH_HAS_HOLES_MEMORYMODEL
  843. select ARCH_REQUIRE_GPIOLIB
  844. select CLKDEV_LOOKUP
  845. select GENERIC_ALLOCATOR
  846. select GENERIC_CLOCKEVENTS
  847. select GENERIC_IRQ_CHIP
  848. select HAVE_IDE
  849. select NEED_MACH_GPIO_H
  850. select USE_OF
  851. select ZONE_DMA
  852. help
  853. Support for TI's DaVinci platform.
  854. config ARCH_OMAP1
  855. bool "TI OMAP1"
  856. depends on MMU
  857. select ARCH_HAS_CPUFREQ
  858. select ARCH_HAS_HOLES_MEMORYMODEL
  859. select ARCH_OMAP
  860. select ARCH_REQUIRE_GPIOLIB
  861. select CLKDEV_LOOKUP
  862. select CLKSRC_MMIO
  863. select GENERIC_CLOCKEVENTS
  864. select GENERIC_IRQ_CHIP
  865. select HAVE_CLK
  866. select HAVE_IDE
  867. select IRQ_DOMAIN
  868. select NEED_MACH_IO_H if PCCARD
  869. select NEED_MACH_MEMORY_H
  870. help
  871. Support for older TI OMAP1 (omap7xx, omap15xx or omap16xx)
  872. endchoice
  873. menu "Multiple platform selection"
  874. depends on ARCH_MULTIPLATFORM
  875. comment "CPU Core family selection"
  876. config ARCH_MULTI_V4
  877. bool "ARMv4 based platforms (FA526, StrongARM)"
  878. depends on !ARCH_MULTI_V6_V7
  879. select ARCH_MULTI_V4_V5
  880. config ARCH_MULTI_V4T
  881. bool "ARMv4T based platforms (ARM720T, ARM920T, ...)"
  882. depends on !ARCH_MULTI_V6_V7
  883. select ARCH_MULTI_V4_V5
  884. config ARCH_MULTI_V5
  885. bool "ARMv5 based platforms (ARM926T, XSCALE, PJ1, ...)"
  886. depends on !ARCH_MULTI_V6_V7
  887. select ARCH_MULTI_V4_V5
  888. config ARCH_MULTI_V4_V5
  889. bool
  890. config ARCH_MULTI_V6
  891. bool "ARMv6 based platforms (ARM11, Scorpion, ...)"
  892. select ARCH_MULTI_V6_V7
  893. select CPU_V6
  894. config ARCH_MULTI_V7
  895. bool "ARMv7 based platforms (Cortex-A, PJ4, Krait)"
  896. default y
  897. select ARCH_MULTI_V6_V7
  898. select ARCH_VEXPRESS
  899. select CPU_V7
  900. config ARCH_MULTI_V6_V7
  901. bool
  902. config ARCH_MULTI_CPU_AUTO
  903. def_bool !(ARCH_MULTI_V4 || ARCH_MULTI_V4T || ARCH_MULTI_V6_V7)
  904. select ARCH_MULTI_V5
  905. endmenu
  906. #
  907. # This is sorted alphabetically by mach-* pathname. However, plat-*
  908. # Kconfigs may be included either alphabetically (according to the
  909. # plat- suffix) or along side the corresponding mach-* source.
  910. #
  911. source "arch/arm/mach-mvebu/Kconfig"
  912. source "arch/arm/mach-at91/Kconfig"
  913. source "arch/arm/mach-bcm/Kconfig"
  914. source "arch/arm/mach-clps711x/Kconfig"
  915. source "arch/arm/mach-cns3xxx/Kconfig"
  916. source "arch/arm/mach-davinci/Kconfig"
  917. source "arch/arm/mach-dove/Kconfig"
  918. source "arch/arm/mach-ep93xx/Kconfig"
  919. source "arch/arm/mach-footbridge/Kconfig"
  920. source "arch/arm/mach-gemini/Kconfig"
  921. source "arch/arm/mach-h720x/Kconfig"
  922. source "arch/arm/mach-highbank/Kconfig"
  923. source "arch/arm/mach-integrator/Kconfig"
  924. source "arch/arm/mach-iop32x/Kconfig"
  925. source "arch/arm/mach-iop33x/Kconfig"
  926. source "arch/arm/mach-iop13xx/Kconfig"
  927. source "arch/arm/mach-ixp4xx/Kconfig"
  928. source "arch/arm/mach-kirkwood/Kconfig"
  929. source "arch/arm/mach-ks8695/Kconfig"
  930. source "arch/arm/mach-msm/Kconfig"
  931. source "arch/arm/mach-mv78xx0/Kconfig"
  932. source "arch/arm/mach-imx/Kconfig"
  933. source "arch/arm/mach-mxs/Kconfig"
  934. source "arch/arm/mach-netx/Kconfig"
  935. source "arch/arm/mach-nomadik/Kconfig"
  936. source "arch/arm/plat-omap/Kconfig"
  937. source "arch/arm/mach-omap1/Kconfig"
  938. source "arch/arm/mach-omap2/Kconfig"
  939. source "arch/arm/mach-orion5x/Kconfig"
  940. source "arch/arm/mach-picoxcell/Kconfig"
  941. source "arch/arm/mach-pxa/Kconfig"
  942. source "arch/arm/plat-pxa/Kconfig"
  943. source "arch/arm/mach-mmp/Kconfig"
  944. source "arch/arm/mach-realview/Kconfig"
  945. source "arch/arm/mach-sa1100/Kconfig"
  946. source "arch/arm/plat-samsung/Kconfig"
  947. source "arch/arm/mach-socfpga/Kconfig"
  948. source "arch/arm/plat-spear/Kconfig"
  949. source "arch/arm/mach-s3c24xx/Kconfig"
  950. if ARCH_S3C64XX
  951. source "arch/arm/mach-s3c64xx/Kconfig"
  952. endif
  953. source "arch/arm/mach-s5p64x0/Kconfig"
  954. source "arch/arm/mach-s5pc100/Kconfig"
  955. source "arch/arm/mach-s5pv210/Kconfig"
  956. source "arch/arm/mach-exynos/Kconfig"
  957. source "arch/arm/mach-shmobile/Kconfig"
  958. source "arch/arm/mach-sunxi/Kconfig"
  959. source "arch/arm/mach-prima2/Kconfig"
  960. source "arch/arm/mach-tegra/Kconfig"
  961. source "arch/arm/mach-u300/Kconfig"
  962. source "arch/arm/mach-ux500/Kconfig"
  963. source "arch/arm/mach-versatile/Kconfig"
  964. source "arch/arm/mach-vexpress/Kconfig"
  965. source "arch/arm/plat-versatile/Kconfig"
  966. source "arch/arm/mach-virt/Kconfig"
  967. source "arch/arm/mach-vt8500/Kconfig"
  968. source "arch/arm/mach-w90x900/Kconfig"
  969. source "arch/arm/mach-zynq/Kconfig"
  970. # Definitions to make life easier
  971. config ARCH_ACORN
  972. bool
  973. config PLAT_IOP
  974. bool
  975. select GENERIC_CLOCKEVENTS
  976. config PLAT_ORION
  977. bool
  978. select CLKSRC_MMIO
  979. select COMMON_CLK
  980. select GENERIC_IRQ_CHIP
  981. select IRQ_DOMAIN
  982. config PLAT_ORION_LEGACY
  983. bool
  984. select PLAT_ORION
  985. config PLAT_PXA
  986. bool
  987. config PLAT_VERSATILE
  988. bool
  989. config ARM_TIMER_SP804
  990. bool
  991. select CLKSRC_MMIO
  992. select HAVE_SCHED_CLOCK
  993. source arch/arm/mm/Kconfig
  994. config ARM_NR_BANKS
  995. int
  996. default 16 if ARCH_EP93XX
  997. default 8
  998. config IWMMXT
  999. bool "Enable iWMMXt support"
  1000. depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
  1001. default y if PXA27x || PXA3xx || ARCH_MMP
  1002. help
  1003. Enable support for iWMMXt context switching at run time if
  1004. running on a CPU that supports it.
  1005. config XSCALE_PMU
  1006. bool
  1007. depends on CPU_XSCALE
  1008. default y
  1009. config MULTI_IRQ_HANDLER
  1010. bool
  1011. help
  1012. Allow each machine to specify it's own IRQ handler at run time.
  1013. if !MMU
  1014. source "arch/arm/Kconfig-nommu"
  1015. endif
  1016. config ARM_ERRATA_326103
  1017. bool "ARM errata: FSR write bit incorrect on a SWP to read-only memory"
  1018. depends on CPU_V6
  1019. help
  1020. Executing a SWP instruction to read-only memory does not set bit 11
  1021. of the FSR on the ARM 1136 prior to r1p0. This causes the kernel to
  1022. treat the access as a read, preventing a COW from occurring and
  1023. causing the faulting task to livelock.
  1024. config ARM_ERRATA_411920
  1025. bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
  1026. depends on CPU_V6 || CPU_V6K
  1027. help
  1028. Invalidation of the Instruction Cache operation can
  1029. fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
  1030. It does not affect the MPCore. This option enables the ARM Ltd.
  1031. recommended workaround.
  1032. config ARM_ERRATA_430973
  1033. bool "ARM errata: Stale prediction on replaced interworking branch"
  1034. depends on CPU_V7
  1035. help
  1036. This option enables the workaround for the 430973 Cortex-A8
  1037. (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
  1038. interworking branch is replaced with another code sequence at the
  1039. same virtual address, whether due to self-modifying code or virtual
  1040. to physical address re-mapping, Cortex-A8 does not recover from the
  1041. stale interworking branch prediction. This results in Cortex-A8
  1042. executing the new code sequence in the incorrect ARM or Thumb state.
  1043. The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
  1044. and also flushes the branch target cache at every context switch.
  1045. Note that setting specific bits in the ACTLR register may not be
  1046. available in non-secure mode.
  1047. config ARM_ERRATA_458693
  1048. bool "ARM errata: Processor deadlock when a false hazard is created"
  1049. depends on CPU_V7
  1050. depends on !ARCH_MULTIPLATFORM
  1051. help
  1052. This option enables the workaround for the 458693 Cortex-A8 (r2p0)
  1053. erratum. For very specific sequences of memory operations, it is
  1054. possible for a hazard condition intended for a cache line to instead
  1055. be incorrectly associated with a different cache line. This false
  1056. hazard might then cause a processor deadlock. The workaround enables
  1057. the L1 caching of the NEON accesses and disables the PLD instruction
  1058. in the ACTLR register. Note that setting specific bits in the ACTLR
  1059. register may not be available in non-secure mode.
  1060. config ARM_ERRATA_460075
  1061. bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
  1062. depends on CPU_V7
  1063. depends on !ARCH_MULTIPLATFORM
  1064. help
  1065. This option enables the workaround for the 460075 Cortex-A8 (r2p0)
  1066. erratum. Any asynchronous access to the L2 cache may encounter a
  1067. situation in which recent store transactions to the L2 cache are lost
  1068. and overwritten with stale memory contents from external memory. The
  1069. workaround disables the write-allocate mode for the L2 cache via the
  1070. ACTLR register. Note that setting specific bits in the ACTLR register
  1071. may not be available in non-secure mode.
  1072. config ARM_ERRATA_742230
  1073. bool "ARM errata: DMB operation may be faulty"
  1074. depends on CPU_V7 && SMP
  1075. depends on !ARCH_MULTIPLATFORM
  1076. help
  1077. This option enables the workaround for the 742230 Cortex-A9
  1078. (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
  1079. between two write operations may not ensure the correct visibility
  1080. ordering of the two writes. This workaround sets a specific bit in
  1081. the diagnostic register of the Cortex-A9 which causes the DMB
  1082. instruction to behave as a DSB, ensuring the correct behaviour of
  1083. the two writes.
  1084. config ARM_ERRATA_742231
  1085. bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
  1086. depends on CPU_V7 && SMP
  1087. depends on !ARCH_MULTIPLATFORM
  1088. help
  1089. This option enables the workaround for the 742231 Cortex-A9
  1090. (r2p0..r2p2) erratum. Under certain conditions, specific to the
  1091. Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
  1092. accessing some data located in the same cache line, may get corrupted
  1093. data due to bad handling of the address hazard when the line gets
  1094. replaced from one of the CPUs at the same time as another CPU is
  1095. accessing it. This workaround sets specific bits in the diagnostic
  1096. register of the Cortex-A9 which reduces the linefill issuing
  1097. capabilities of the processor.
  1098. config PL310_ERRATA_588369
  1099. bool "PL310 errata: Clean & Invalidate maintenance operations do not invalidate clean lines"
  1100. depends on CACHE_L2X0
  1101. help
  1102. The PL310 L2 cache controller implements three types of Clean &
  1103. Invalidate maintenance operations: by Physical Address
  1104. (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
  1105. They are architecturally defined to behave as the execution of a
  1106. clean operation followed immediately by an invalidate operation,
  1107. both performing to the same memory location. This functionality
  1108. is not correctly implemented in PL310 as clean lines are not
  1109. invalidated as a result of these operations.
  1110. config ARM_ERRATA_720789
  1111. bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
  1112. depends on CPU_V7
  1113. help
  1114. This option enables the workaround for the 720789 Cortex-A9 (prior to
  1115. r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
  1116. broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
  1117. As a consequence of this erratum, some TLB entries which should be
  1118. invalidated are not, resulting in an incoherency in the system page
  1119. tables. The workaround changes the TLB flushing routines to invalidate
  1120. entries regardless of the ASID.
  1121. config PL310_ERRATA_727915
  1122. bool "PL310 errata: Background Clean & Invalidate by Way operation can cause data corruption"
  1123. depends on CACHE_L2X0
  1124. help
  1125. PL310 implements the Clean & Invalidate by Way L2 cache maintenance
  1126. operation (offset 0x7FC). This operation runs in background so that
  1127. PL310 can handle normal accesses while it is in progress. Under very
  1128. rare circumstances, due to this erratum, write data can be lost when
  1129. PL310 treats a cacheable write transaction during a Clean &
  1130. Invalidate by Way operation.
  1131. config ARM_ERRATA_743622
  1132. bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
  1133. depends on CPU_V7
  1134. depends on !ARCH_MULTIPLATFORM
  1135. help
  1136. This option enables the workaround for the 743622 Cortex-A9
  1137. (r2p*) erratum. Under very rare conditions, a faulty
  1138. optimisation in the Cortex-A9 Store Buffer may lead to data
  1139. corruption. This workaround sets a specific bit in the diagnostic
  1140. register of the Cortex-A9 which disables the Store Buffer
  1141. optimisation, preventing the defect from occurring. This has no
  1142. visible impact on the overall performance or power consumption of the
  1143. processor.
  1144. config ARM_ERRATA_751472
  1145. bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
  1146. depends on CPU_V7
  1147. depends on !ARCH_MULTIPLATFORM
  1148. help
  1149. This option enables the workaround for the 751472 Cortex-A9 (prior
  1150. to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
  1151. completion of a following broadcasted operation if the second
  1152. operation is received by a CPU before the ICIALLUIS has completed,
  1153. potentially leading to corrupted entries in the cache or TLB.
  1154. config PL310_ERRATA_753970
  1155. bool "PL310 errata: cache sync operation may be faulty"
  1156. depends on CACHE_PL310
  1157. help
  1158. This option enables the workaround for the 753970 PL310 (r3p0) erratum.
  1159. Under some condition the effect of cache sync operation on
  1160. the store buffer still remains when the operation completes.
  1161. This means that the store buffer is always asked to drain and
  1162. this prevents it from merging any further writes. The workaround
  1163. is to replace the normal offset of cache sync operation (0x730)
  1164. by another offset targeting an unmapped PL310 register 0x740.
  1165. This has the same effect as the cache sync operation: store buffer
  1166. drain and waiting for all buffers empty.
  1167. config ARM_ERRATA_754322
  1168. bool "ARM errata: possible faulty MMU translations following an ASID switch"
  1169. depends on CPU_V7
  1170. help
  1171. This option enables the workaround for the 754322 Cortex-A9 (r2p*,
  1172. r3p*) erratum. A speculative memory access may cause a page table walk
  1173. which starts prior to an ASID switch but completes afterwards. This
  1174. can populate the micro-TLB with a stale entry which may be hit with
  1175. the new ASID. This workaround places two dsb instructions in the mm
  1176. switching code so that no page table walks can cross the ASID switch.
  1177. config ARM_ERRATA_754327
  1178. bool "ARM errata: no automatic Store Buffer drain"
  1179. depends on CPU_V7 && SMP
  1180. help
  1181. This option enables the workaround for the 754327 Cortex-A9 (prior to
  1182. r2p0) erratum. The Store Buffer does not have any automatic draining
  1183. mechanism and therefore a livelock may occur if an external agent
  1184. continuously polls a memory location waiting to observe an update.
  1185. This workaround defines cpu_relax() as smp_mb(), preventing correctly
  1186. written polling loops from denying visibility of updates to memory.
  1187. config ARM_ERRATA_364296
  1188. bool "ARM errata: Possible cache data corruption with hit-under-miss enabled"
  1189. depends on CPU_V6 && !SMP
  1190. help
  1191. This options enables the workaround for the 364296 ARM1136
  1192. r0p2 erratum (possible cache data corruption with
  1193. hit-under-miss enabled). It sets the undocumented bit 31 in
  1194. the auxiliary control register and the FI bit in the control
  1195. register, thus disabling hit-under-miss without putting the
  1196. processor into full low interrupt latency mode. ARM11MPCore
  1197. is not affected.
  1198. config ARM_ERRATA_764369
  1199. bool "ARM errata: Data cache line maintenance operation by MVA may not succeed"
  1200. depends on CPU_V7 && SMP
  1201. help
  1202. This option enables the workaround for erratum 764369
  1203. affecting Cortex-A9 MPCore with two or more processors (all
  1204. current revisions). Under certain timing circumstances, a data
  1205. cache line maintenance operation by MVA targeting an Inner
  1206. Shareable memory region may fail to proceed up to either the
  1207. Point of Coherency or to the Point of Unification of the
  1208. system. This workaround adds a DSB instruction before the
  1209. relevant cache maintenance functions and sets a specific bit
  1210. in the diagnostic control register of the SCU.
  1211. config PL310_ERRATA_769419
  1212. bool "PL310 errata: no automatic Store Buffer drain"
  1213. depends on CACHE_L2X0
  1214. help
  1215. On revisions of the PL310 prior to r3p2, the Store Buffer does
  1216. not automatically drain. This can cause normal, non-cacheable
  1217. writes to be retained when the memory system is idle, leading
  1218. to suboptimal I/O performance for drivers using coherent DMA.
  1219. This option adds a write barrier to the cpu_idle loop so that,
  1220. on systems with an outer cache, the store buffer is drained
  1221. explicitly.
  1222. config ARM_ERRATA_775420
  1223. bool "ARM errata: A data cache maintenance operation which aborts, might lead to deadlock"
  1224. depends on CPU_V7
  1225. help
  1226. This option enables the workaround for the 775420 Cortex-A9 (r2p2,
  1227. r2p6,r2p8,r2p10,r3p0) erratum. In case a date cache maintenance
  1228. operation aborts with MMU exception, it might cause the processor
  1229. to deadlock. This workaround puts DSB before executing ISB if
  1230. an abort may occur on cache maintenance.
  1231. endmenu
  1232. source "arch/arm/common/Kconfig"
  1233. menu "Bus support"
  1234. config ARM_AMBA
  1235. bool
  1236. config ISA
  1237. bool
  1238. help
  1239. Find out whether you have ISA slots on your motherboard. ISA is the
  1240. name of a bus system, i.e. the way the CPU talks to the other stuff
  1241. inside your box. Other bus systems are PCI, EISA, MicroChannel
  1242. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  1243. newer boards don't support it. If you have ISA, say Y, otherwise N.
  1244. # Select ISA DMA controller support
  1245. config ISA_DMA
  1246. bool
  1247. select ISA_DMA_API
  1248. config ARCH_NO_VIRT_TO_BUS
  1249. def_bool y
  1250. depends on !ARCH_RPC && !ARCH_NETWINDER && !ARCH_SHARK
  1251. # Select ISA DMA interface
  1252. config ISA_DMA_API
  1253. bool
  1254. config PCI
  1255. bool "PCI support" if MIGHT_HAVE_PCI
  1256. help
  1257. Find out whether you have a PCI motherboard. PCI is the name of a
  1258. bus system, i.e. the way the CPU talks to the other stuff inside
  1259. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  1260. VESA. If you have PCI, say Y, otherwise N.
  1261. config PCI_DOMAINS
  1262. bool
  1263. depends on PCI
  1264. config PCI_NANOENGINE
  1265. bool "BSE nanoEngine PCI support"
  1266. depends on SA1100_NANOENGINE
  1267. help
  1268. Enable PCI on the BSE nanoEngine board.
  1269. config PCI_SYSCALL
  1270. def_bool PCI
  1271. # Select the host bridge type
  1272. config PCI_HOST_VIA82C505
  1273. bool
  1274. depends on PCI && ARCH_SHARK
  1275. default y
  1276. config PCI_HOST_ITE8152
  1277. bool
  1278. depends on PCI && MACH_ARMCORE
  1279. default y
  1280. select DMABOUNCE
  1281. source "drivers/pci/Kconfig"
  1282. source "drivers/pcmcia/Kconfig"
  1283. endmenu
  1284. menu "Kernel Features"
  1285. config HAVE_SMP
  1286. bool
  1287. help
  1288. This option should be selected by machines which have an SMP-
  1289. capable CPU.
  1290. The only effect of this option is to make the SMP-related
  1291. options available to the user for configuration.
  1292. config SMP
  1293. bool "Symmetric Multi-Processing"
  1294. depends on CPU_V6K || CPU_V7
  1295. depends on GENERIC_CLOCKEVENTS
  1296. depends on HAVE_SMP
  1297. depends on MMU
  1298. select HAVE_ARM_SCU if !ARCH_MSM_SCORPIONMP
  1299. select USE_GENERIC_SMP_HELPERS
  1300. help
  1301. This enables support for systems with more than one CPU. If you have
  1302. a system with only one CPU, like most personal computers, say N. If
  1303. you have a system with more than one CPU, say Y.
  1304. If you say N here, the kernel will run on single and multiprocessor
  1305. machines, but will use only one CPU of a multiprocessor machine. If
  1306. you say Y here, the kernel will run on many, but not all, single
  1307. processor machines. On a single processor machine, the kernel will
  1308. run faster if you say N here.
  1309. See also <file:Documentation/x86/i386/IO-APIC.txt>,
  1310. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  1311. <http://tldp.org/HOWTO/SMP-HOWTO.html>.
  1312. If you don't know what to do here, say N.
  1313. config SMP_ON_UP
  1314. bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
  1315. depends on SMP && !XIP_KERNEL
  1316. default y
  1317. help
  1318. SMP kernels contain instructions which fail on non-SMP processors.
  1319. Enabling this option allows the kernel to modify itself to make
  1320. these instructions safe. Disabling it allows about 1K of space
  1321. savings.
  1322. If you don't know what to do here, say Y.
  1323. config ARM_CPU_TOPOLOGY
  1324. bool "Support cpu topology definition"
  1325. depends on SMP && CPU_V7
  1326. default y
  1327. help
  1328. Support ARM cpu topology definition. The MPIDR register defines
  1329. affinity between processors which is then used to describe the cpu
  1330. topology of an ARM System.
  1331. config SCHED_MC
  1332. bool "Multi-core scheduler support"
  1333. depends on ARM_CPU_TOPOLOGY
  1334. help
  1335. Multi-core scheduler support improves the CPU scheduler's decision
  1336. making when dealing with multi-core CPU chips at a cost of slightly
  1337. increased overhead in some places. If unsure say N here.
  1338. config SCHED_SMT
  1339. bool "SMT scheduler support"
  1340. depends on ARM_CPU_TOPOLOGY
  1341. help
  1342. Improves the CPU scheduler's decision making when dealing with
  1343. MultiThreading at a cost of slightly increased overhead in some
  1344. places. If unsure say N here.
  1345. config HAVE_ARM_SCU
  1346. bool
  1347. help
  1348. This option enables support for the ARM system coherency unit
  1349. config HAVE_ARM_ARCH_TIMER
  1350. bool "Architected timer support"
  1351. depends on CPU_V7
  1352. select ARM_ARCH_TIMER
  1353. help
  1354. This option enables support for the ARM architected timer
  1355. config HAVE_ARM_TWD
  1356. bool
  1357. depends on SMP
  1358. help
  1359. This options enables support for the ARM timer and watchdog unit
  1360. choice
  1361. prompt "Memory split"
  1362. default VMSPLIT_3G
  1363. help
  1364. Select the desired split between kernel and user memory.
  1365. If you are not absolutely sure what you are doing, leave this
  1366. option alone!
  1367. config VMSPLIT_3G
  1368. bool "3G/1G user/kernel split"
  1369. config VMSPLIT_2G
  1370. bool "2G/2G user/kernel split"
  1371. config VMSPLIT_1G
  1372. bool "1G/3G user/kernel split"
  1373. endchoice
  1374. config PAGE_OFFSET
  1375. hex
  1376. default 0x40000000 if VMSPLIT_1G
  1377. default 0x80000000 if VMSPLIT_2G
  1378. default 0xC0000000
  1379. config NR_CPUS
  1380. int "Maximum number of CPUs (2-32)"
  1381. range 2 32
  1382. depends on SMP
  1383. default "4"
  1384. config HOTPLUG_CPU
  1385. bool "Support for hot-pluggable CPUs"
  1386. depends on SMP && HOTPLUG
  1387. help
  1388. Say Y here to experiment with turning CPUs off and on. CPUs
  1389. can be controlled through /sys/devices/system/cpu.
  1390. config ARM_PSCI
  1391. bool "Support for the ARM Power State Coordination Interface (PSCI)"
  1392. depends on CPU_V7
  1393. help
  1394. Say Y here if you want Linux to communicate with system firmware
  1395. implementing the PSCI specification for CPU-centric power
  1396. management operations described in ARM document number ARM DEN
  1397. 0022A ("Power State Coordination Interface System Software on
  1398. ARM processors").
  1399. config LOCAL_TIMERS
  1400. bool "Use local timer interrupts"
  1401. depends on SMP
  1402. default y
  1403. select HAVE_ARM_TWD if (!ARCH_MSM_SCORPIONMP && !EXYNOS4_MCT)
  1404. help
  1405. Enable support for local timers on SMP platforms, rather then the
  1406. legacy IPI broadcast method. Local timers allows the system
  1407. accounting to be spread across the timer interval, preventing a
  1408. "thundering herd" at every timer tick.
  1409. config ARCH_NR_GPIO
  1410. int
  1411. default 1024 if ARCH_SHMOBILE || ARCH_TEGRA
  1412. default 355 if ARCH_U8500
  1413. default 264 if MACH_H4700
  1414. default 512 if SOC_OMAP5
  1415. default 288 if ARCH_VT8500 || ARCH_SUNXI
  1416. default 0
  1417. help
  1418. Maximum number of GPIOs in the system.
  1419. If unsure, leave the default value.
  1420. source kernel/Kconfig.preempt
  1421. config HZ
  1422. int
  1423. default 200 if ARCH_EBSA110 || ARCH_S3C24XX || ARCH_S5P64X0 || \
  1424. ARCH_S5PV210 || ARCH_EXYNOS4
  1425. default AT91_TIMER_HZ if ARCH_AT91
  1426. default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
  1427. default 100
  1428. config SCHED_HRTICK
  1429. def_bool HIGH_RES_TIMERS
  1430. config THUMB2_KERNEL
  1431. bool "Compile the kernel in Thumb-2 mode"
  1432. depends on CPU_V7 && !CPU_V6 && !CPU_V6K
  1433. select AEABI
  1434. select ARM_ASM_UNIFIED
  1435. select ARM_UNWIND
  1436. help
  1437. By enabling this option, the kernel will be compiled in
  1438. Thumb-2 mode. A compiler/assembler that understand the unified
  1439. ARM-Thumb syntax is needed.
  1440. If unsure, say N.
  1441. config THUMB2_AVOID_R_ARM_THM_JUMP11
  1442. bool "Work around buggy Thumb-2 short branch relocations in gas"
  1443. depends on THUMB2_KERNEL && MODULES
  1444. default y
  1445. help
  1446. Various binutils versions can resolve Thumb-2 branches to
  1447. locally-defined, preemptible global symbols as short-range "b.n"
  1448. branch instructions.
  1449. This is a problem, because there's no guarantee the final
  1450. destination of the symbol, or any candidate locations for a
  1451. trampoline, are within range of the branch. For this reason, the
  1452. kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
  1453. relocation in modules at all, and it makes little sense to add
  1454. support.
  1455. The symptom is that the kernel fails with an "unsupported
  1456. relocation" error when loading some modules.
  1457. Until fixed tools are available, passing
  1458. -fno-optimize-sibling-calls to gcc should prevent gcc generating
  1459. code which hits this problem, at the cost of a bit of extra runtime
  1460. stack usage in some cases.
  1461. The problem is described in more detail at:
  1462. https://bugs.launchpad.net/binutils-linaro/+bug/725126
  1463. Only Thumb-2 kernels are affected.
  1464. Unless you are sure your tools don't have this problem, say Y.
  1465. config ARM_ASM_UNIFIED
  1466. bool
  1467. config AEABI
  1468. bool "Use the ARM EABI to compile the kernel"
  1469. help
  1470. This option allows for the kernel to be compiled using the latest
  1471. ARM ABI (aka EABI). This is only useful if you are using a user
  1472. space environment that is also compiled with EABI.
  1473. Since there are major incompatibilities between the legacy ABI and
  1474. EABI, especially with regard to structure member alignment, this
  1475. option also changes the kernel syscall calling convention to
  1476. disambiguate both ABIs and allow for backward compatibility support
  1477. (selected with CONFIG_OABI_COMPAT).
  1478. To use this you need GCC version 4.0.0 or later.
  1479. config OABI_COMPAT
  1480. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  1481. depends on AEABI && !THUMB2_KERNEL
  1482. default y
  1483. help
  1484. This option preserves the old syscall interface along with the
  1485. new (ARM EABI) one. It also provides a compatibility layer to
  1486. intercept syscalls that have structure arguments which layout
  1487. in memory differs between the legacy ABI and the new ARM EABI
  1488. (only for non "thumb" binaries). This option adds a tiny
  1489. overhead to all syscalls and produces a slightly larger kernel.
  1490. If you know you'll be using only pure EABI user space then you
  1491. can say N here. If this option is not selected and you attempt
  1492. to execute a legacy ABI binary then the result will be
  1493. UNPREDICTABLE (in fact it can be predicted that it won't work
  1494. at all). If in doubt say Y.
  1495. config ARCH_HAS_HOLES_MEMORYMODEL
  1496. bool
  1497. config ARCH_SPARSEMEM_ENABLE
  1498. bool
  1499. config ARCH_SPARSEMEM_DEFAULT
  1500. def_bool ARCH_SPARSEMEM_ENABLE
  1501. config ARCH_SELECT_MEMORY_MODEL
  1502. def_bool ARCH_SPARSEMEM_ENABLE
  1503. config HAVE_ARCH_PFN_VALID
  1504. def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
  1505. config HIGHMEM
  1506. bool "High Memory Support"
  1507. depends on MMU
  1508. help
  1509. The address space of ARM processors is only 4 Gigabytes large
  1510. and it has to accommodate user address space, kernel address
  1511. space as well as some memory mapped IO. That means that, if you
  1512. have a large amount of physical memory and/or IO, not all of the
  1513. memory can be "permanently mapped" by the kernel. The physical
  1514. memory that is not permanently mapped is called "high memory".
  1515. Depending on the selected kernel/user memory split, minimum
  1516. vmalloc space and actual amount of RAM, you may not need this
  1517. option which should result in a slightly faster kernel.
  1518. If unsure, say n.
  1519. config HIGHPTE
  1520. bool "Allocate 2nd-level pagetables from highmem"
  1521. depends on HIGHMEM
  1522. config HW_PERF_EVENTS
  1523. bool "Enable hardware performance counter support for perf events"
  1524. depends on PERF_EVENTS
  1525. default y
  1526. help
  1527. Enable hardware performance counter support for perf events. If
  1528. disabled, perf events will use software events only.
  1529. source "mm/Kconfig"
  1530. config FORCE_MAX_ZONEORDER
  1531. int "Maximum zone order" if ARCH_SHMOBILE
  1532. range 11 64 if ARCH_SHMOBILE
  1533. default "12" if SOC_AM33XX
  1534. default "9" if SA1111
  1535. default "11"
  1536. help
  1537. The kernel memory allocator divides physically contiguous memory
  1538. blocks into "zones", where each zone is a power of two number of
  1539. pages. This option selects the largest power of two that the kernel
  1540. keeps in the memory allocator. If you need to allocate very large
  1541. blocks of physically contiguous memory, then you may need to
  1542. increase this value.
  1543. This config option is actually maximum order plus one. For example,
  1544. a value of 11 means that the largest free memory block is 2^10 pages.
  1545. config ALIGNMENT_TRAP
  1546. bool
  1547. depends on CPU_CP15_MMU
  1548. default y if !ARCH_EBSA110
  1549. select HAVE_PROC_CPU if PROC_FS
  1550. help
  1551. ARM processors cannot fetch/store information which is not
  1552. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  1553. address divisible by 4. On 32-bit ARM processors, these non-aligned
  1554. fetch/store instructions will be emulated in software if you say
  1555. here, which has a severe performance impact. This is necessary for
  1556. correct operation of some network protocols. With an IP-only
  1557. configuration it is safe to say N, otherwise say Y.
  1558. config UACCESS_WITH_MEMCPY
  1559. bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user()"
  1560. depends on MMU
  1561. default y if CPU_FEROCEON
  1562. help
  1563. Implement faster copy_to_user and clear_user methods for CPU
  1564. cores where a 8-word STM instruction give significantly higher
  1565. memory write throughput than a sequence of individual 32bit stores.
  1566. A possible side effect is a slight increase in scheduling latency
  1567. between threads sharing the same address space if they invoke
  1568. such copy operations with large buffers.
  1569. However, if the CPU data cache is using a write-allocate mode,
  1570. this option is unlikely to provide any performance gain.
  1571. config SECCOMP
  1572. bool
  1573. prompt "Enable seccomp to safely compute untrusted bytecode"
  1574. ---help---
  1575. This kernel feature is useful for number crunching applications
  1576. that may need to compute untrusted bytecode during their
  1577. execution. By using pipes or other transports made available to
  1578. the process as file descriptors supporting the read/write
  1579. syscalls, it's possible to isolate those applications in
  1580. their own address space using seccomp. Once seccomp is
  1581. enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
  1582. and the task is only allowed to execute a few safe syscalls
  1583. defined by each seccomp mode.
  1584. config CC_STACKPROTECTOR
  1585. bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
  1586. help
  1587. This option turns on the -fstack-protector GCC feature. This
  1588. feature puts, at the beginning of functions, a canary value on
  1589. the stack just before the return address, and validates
  1590. the value just before actually returning. Stack based buffer
  1591. overflows (that need to overwrite this return address) now also
  1592. overwrite the canary, which gets detected and the attack is then
  1593. neutralized via a kernel panic.
  1594. This feature requires gcc version 4.2 or above.
  1595. config XEN_DOM0
  1596. def_bool y
  1597. depends on XEN
  1598. config XEN
  1599. bool "Xen guest support on ARM (EXPERIMENTAL)"
  1600. depends on ARM && OF
  1601. depends on CPU_V7 && !CPU_V6
  1602. help
  1603. Say Y if you want to run Linux in a Virtual Machine on Xen on ARM.
  1604. endmenu
  1605. menu "Boot options"
  1606. config USE_OF
  1607. bool "Flattened Device Tree support"
  1608. select IRQ_DOMAIN
  1609. select OF
  1610. select OF_EARLY_FLATTREE
  1611. help
  1612. Include support for flattened device tree machine descriptions.
  1613. config ATAGS
  1614. bool "Support for the traditional ATAGS boot data passing" if USE_OF
  1615. default y
  1616. help
  1617. This is the traditional way of passing data to the kernel at boot
  1618. time. If you are solely relying on the flattened device tree (or
  1619. the ARM_ATAG_DTB_COMPAT option) then you may unselect this option
  1620. to remove ATAGS support from your kernel binary. If unsure,
  1621. leave this to y.
  1622. config DEPRECATED_PARAM_STRUCT
  1623. bool "Provide old way to pass kernel parameters"
  1624. depends on ATAGS
  1625. help
  1626. This was deprecated in 2001 and announced to live on for 5 years.
  1627. Some old boot loaders still use this way.
  1628. # Compressed boot loader in ROM. Yes, we really want to ask about
  1629. # TEXT and BSS so we preserve their values in the config files.
  1630. config ZBOOT_ROM_TEXT
  1631. hex "Compressed ROM boot loader base address"
  1632. default "0"
  1633. help
  1634. The physical address at which the ROM-able zImage is to be
  1635. placed in the target. Platforms which normally make use of
  1636. ROM-able zImage formats normally set this to a suitable
  1637. value in their defconfig file.
  1638. If ZBOOT_ROM is not enabled, this has no effect.
  1639. config ZBOOT_ROM_BSS
  1640. hex "Compressed ROM boot loader BSS address"
  1641. default "0"
  1642. help
  1643. The base address of an area of read/write memory in the target
  1644. for the ROM-able zImage which must be available while the
  1645. decompressor is running. It must be large enough to hold the
  1646. entire decompressed kernel plus an additional 128 KiB.
  1647. Platforms which normally make use of ROM-able zImage formats
  1648. normally set this to a suitable value in their defconfig file.
  1649. If ZBOOT_ROM is not enabled, this has no effect.
  1650. config ZBOOT_ROM
  1651. bool "Compressed boot loader in ROM/flash"
  1652. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  1653. help
  1654. Say Y here if you intend to execute your compressed kernel image
  1655. (zImage) directly from ROM or flash. If unsure, say N.
  1656. choice
  1657. prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)"
  1658. depends on ZBOOT_ROM && ARCH_SH7372
  1659. default ZBOOT_ROM_NONE
  1660. help
  1661. Include experimental SD/MMC loading code in the ROM-able zImage.
  1662. With this enabled it is possible to write the ROM-able zImage
  1663. kernel image to an MMC or SD card and boot the kernel straight
  1664. from the reset vector. At reset the processor Mask ROM will load
  1665. the first part of the ROM-able zImage which in turn loads the
  1666. rest the kernel image to RAM.
  1667. config ZBOOT_ROM_NONE
  1668. bool "No SD/MMC loader in zImage (EXPERIMENTAL)"
  1669. help
  1670. Do not load image from SD or MMC
  1671. config ZBOOT_ROM_MMCIF
  1672. bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
  1673. help
  1674. Load image from MMCIF hardware block.
  1675. config ZBOOT_ROM_SH_MOBILE_SDHI
  1676. bool "Include SuperH Mobile SDHI loader in zImage (EXPERIMENTAL)"
  1677. help
  1678. Load image from SDHI hardware block
  1679. endchoice
  1680. config ARM_APPENDED_DTB
  1681. bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
  1682. depends on OF && !ZBOOT_ROM
  1683. help
  1684. With this option, the boot code will look for a device tree binary
  1685. (DTB) appended to zImage
  1686. (e.g. cat zImage <filename>.dtb > zImage_w_dtb).
  1687. This is meant as a backward compatibility convenience for those
  1688. systems with a bootloader that can't be upgraded to accommodate
  1689. the documented boot protocol using a device tree.
  1690. Beware that there is very little in terms of protection against
  1691. this option being confused by leftover garbage in memory that might
  1692. look like a DTB header after a reboot if no actual DTB is appended
  1693. to zImage. Do not leave this option active in a production kernel
  1694. if you don't intend to always append a DTB. Proper passing of the
  1695. location into r2 of a bootloader provided DTB is always preferable
  1696. to this option.
  1697. config ARM_ATAG_DTB_COMPAT
  1698. bool "Supplement the appended DTB with traditional ATAG information"
  1699. depends on ARM_APPENDED_DTB
  1700. help
  1701. Some old bootloaders can't be updated to a DTB capable one, yet
  1702. they provide ATAGs with memory configuration, the ramdisk address,
  1703. the kernel cmdline string, etc. Such information is dynamically
  1704. provided by the bootloader and can't always be stored in a static
  1705. DTB. To allow a device tree enabled kernel to be used with such
  1706. bootloaders, this option allows zImage to extract the information
  1707. from the ATAG list and store it at run time into the appended DTB.
  1708. choice
  1709. prompt "Kernel command line type" if ARM_ATAG_DTB_COMPAT
  1710. default ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
  1711. config ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
  1712. bool "Use bootloader kernel arguments if available"
  1713. help
  1714. Uses the command-line options passed by the boot loader instead of
  1715. the device tree bootargs property. If the boot loader doesn't provide
  1716. any, the device tree bootargs property will be used.
  1717. config ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEND
  1718. bool "Extend with bootloader kernel arguments"
  1719. help
  1720. The command-line arguments provided by the boot loader will be
  1721. appended to the the device tree bootargs property.
  1722. endchoice
  1723. config CMDLINE
  1724. string "Default kernel command string"
  1725. default ""
  1726. help
  1727. On some architectures (EBSA110 and CATS), there is currently no way
  1728. for the boot loader to pass arguments to the kernel. For these
  1729. architectures, you should supply some command-line options at build
  1730. time by entering them here. As a minimum, you should specify the
  1731. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  1732. choice
  1733. prompt "Kernel command line type" if CMDLINE != ""
  1734. default CMDLINE_FROM_BOOTLOADER
  1735. depends on ATAGS
  1736. config CMDLINE_FROM_BOOTLOADER
  1737. bool "Use bootloader kernel arguments if available"
  1738. help
  1739. Uses the command-line options passed by the boot loader. If
  1740. the boot loader doesn't provide any, the default kernel command
  1741. string provided in CMDLINE will be used.
  1742. config CMDLINE_EXTEND
  1743. bool "Extend bootloader kernel arguments"
  1744. help
  1745. The command-line arguments provided by the boot loader will be
  1746. appended to the default kernel command string.
  1747. config CMDLINE_FORCE
  1748. bool "Always use the default kernel command string"
  1749. help
  1750. Always use the default kernel command string, even if the boot
  1751. loader passes other arguments to the kernel.
  1752. This is useful if you cannot or don't want to change the
  1753. command-line options your boot loader passes to the kernel.
  1754. endchoice
  1755. config XIP_KERNEL
  1756. bool "Kernel Execute-In-Place from ROM"
  1757. depends on !ZBOOT_ROM && !ARM_LPAE && !ARCH_MULTIPLATFORM
  1758. help
  1759. Execute-In-Place allows the kernel to run from non-volatile storage
  1760. directly addressable by the CPU, such as NOR flash. This saves RAM
  1761. space since the text section of the kernel is not loaded from flash
  1762. to RAM. Read-write sections, such as the data section and stack,
  1763. are still copied to RAM. The XIP kernel is not compressed since
  1764. it has to run directly from flash, so it will take more space to
  1765. store it. The flash address used to link the kernel object files,
  1766. and for storing it, is configuration dependent. Therefore, if you
  1767. say Y here, you must know the proper physical address where to
  1768. store the kernel image depending on your own flash memory usage.
  1769. Also note that the make target becomes "make xipImage" rather than
  1770. "make zImage" or "make Image". The final kernel binary to put in
  1771. ROM memory will be arch/arm/boot/xipImage.
  1772. If unsure, say N.
  1773. config XIP_PHYS_ADDR
  1774. hex "XIP Kernel Physical Location"
  1775. depends on XIP_KERNEL
  1776. default "0x00080000"
  1777. help
  1778. This is the physical address in your flash memory the kernel will
  1779. be linked for and stored to. This address is dependent on your
  1780. own flash usage.
  1781. config KEXEC
  1782. bool "Kexec system call (EXPERIMENTAL)"
  1783. depends on (!SMP || HOTPLUG_CPU)
  1784. help
  1785. kexec is a system call that implements the ability to shutdown your
  1786. current kernel, and to start another kernel. It is like a reboot
  1787. but it is independent of the system firmware. And like a reboot
  1788. you can start any kernel with it, not just Linux.
  1789. It is an ongoing process to be certain the hardware in a machine
  1790. is properly shutdown, so do not be surprised if this code does not
  1791. initially work for you. It may help to enable device hotplugging
  1792. support.
  1793. config ATAGS_PROC
  1794. bool "Export atags in procfs"
  1795. depends on ATAGS && KEXEC
  1796. default y
  1797. help
  1798. Should the atags used to boot the kernel be exported in an "atags"
  1799. file in procfs. Useful with kexec.
  1800. config CRASH_DUMP
  1801. bool "Build kdump crash kernel (EXPERIMENTAL)"
  1802. help
  1803. Generate crash dump after being started by kexec. This should
  1804. be normally only set in special crash dump kernels which are
  1805. loaded in the main kernel with kexec-tools into a specially
  1806. reserved region and then later executed after a crash by
  1807. kdump/kexec. The crash dump kernel must be compiled to a
  1808. memory address not used by the main kernel
  1809. For more details see Documentation/kdump/kdump.txt
  1810. config AUTO_ZRELADDR
  1811. bool "Auto calculation of the decompressed kernel image address"
  1812. depends on !ZBOOT_ROM && !ARCH_U300
  1813. help
  1814. ZRELADDR is the physical address where the decompressed kernel
  1815. image will be placed. If AUTO_ZRELADDR is selected, the address
  1816. will be determined at run-time by masking the current IP with
  1817. 0xf8000000. This assumes the zImage being placed in the first 128MB
  1818. from start of memory.
  1819. endmenu
  1820. menu "CPU Power Management"
  1821. if ARCH_HAS_CPUFREQ
  1822. source "drivers/cpufreq/Kconfig"
  1823. config CPU_FREQ_IMX
  1824. tristate "CPUfreq driver for i.MX CPUs"
  1825. depends on ARCH_MXC && CPU_FREQ
  1826. select CPU_FREQ_TABLE
  1827. help
  1828. This enables the CPUfreq driver for i.MX CPUs.
  1829. config CPU_FREQ_SA1100
  1830. bool
  1831. config CPU_FREQ_SA1110
  1832. bool
  1833. config CPU_FREQ_INTEGRATOR
  1834. tristate "CPUfreq driver for ARM Integrator CPUs"
  1835. depends on ARCH_INTEGRATOR && CPU_FREQ
  1836. default y
  1837. help
  1838. This enables the CPUfreq driver for ARM Integrator CPUs.
  1839. For details, take a look at <file:Documentation/cpu-freq>.
  1840. If in doubt, say Y.
  1841. config CPU_FREQ_PXA
  1842. bool
  1843. depends on CPU_FREQ && ARCH_PXA && PXA25x
  1844. default y
  1845. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  1846. select CPU_FREQ_TABLE
  1847. config CPU_FREQ_S3C
  1848. bool
  1849. help
  1850. Internal configuration node for common cpufreq on Samsung SoC
  1851. config CPU_FREQ_S3C24XX
  1852. bool "CPUfreq driver for Samsung S3C24XX series CPUs (EXPERIMENTAL)"
  1853. depends on ARCH_S3C24XX && CPU_FREQ
  1854. select CPU_FREQ_S3C
  1855. help
  1856. This enables the CPUfreq driver for the Samsung S3C24XX family
  1857. of CPUs.
  1858. For details, take a look at <file:Documentation/cpu-freq>.
  1859. If in doubt, say N.
  1860. config CPU_FREQ_S3C24XX_PLL
  1861. bool "Support CPUfreq changing of PLL frequency (EXPERIMENTAL)"
  1862. depends on CPU_FREQ_S3C24XX
  1863. help
  1864. Compile in support for changing the PLL frequency from the
  1865. S3C24XX series CPUfreq driver. The PLL takes time to settle
  1866. after a frequency change, so by default it is not enabled.
  1867. This also means that the PLL tables for the selected CPU(s) will
  1868. be built which may increase the size of the kernel image.
  1869. config CPU_FREQ_S3C24XX_DEBUG
  1870. bool "Debug CPUfreq Samsung driver core"
  1871. depends on CPU_FREQ_S3C24XX
  1872. help
  1873. Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
  1874. config CPU_FREQ_S3C24XX_IODEBUG
  1875. bool "Debug CPUfreq Samsung driver IO timing"
  1876. depends on CPU_FREQ_S3C24XX
  1877. help
  1878. Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
  1879. config CPU_FREQ_S3C24XX_DEBUGFS
  1880. bool "Export debugfs for CPUFreq"
  1881. depends on CPU_FREQ_S3C24XX && DEBUG_FS
  1882. help
  1883. Export status information via debugfs.
  1884. endif
  1885. source "drivers/cpuidle/Kconfig"
  1886. endmenu
  1887. menu "Floating point emulation"
  1888. comment "At least one emulation must be selected"
  1889. config FPE_NWFPE
  1890. bool "NWFPE math emulation"
  1891. depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
  1892. ---help---
  1893. Say Y to include the NWFPE floating point emulator in the kernel.
  1894. This is necessary to run most binaries. Linux does not currently
  1895. support floating point hardware so you need to say Y here even if
  1896. your machine has an FPA or floating point co-processor podule.
  1897. You may say N here if you are going to load the Acorn FPEmulator
  1898. early in the bootup.
  1899. config FPE_NWFPE_XP
  1900. bool "Support extended precision"
  1901. depends on FPE_NWFPE
  1902. help
  1903. Say Y to include 80-bit support in the kernel floating-point
  1904. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  1905. Note that gcc does not generate 80-bit operations by default,
  1906. so in most cases this option only enlarges the size of the
  1907. floating point emulator without any good reason.
  1908. You almost surely want to say N here.
  1909. config FPE_FASTFPE
  1910. bool "FastFPE math emulation (EXPERIMENTAL)"
  1911. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3
  1912. ---help---
  1913. Say Y here to include the FAST floating point emulator in the kernel.
  1914. This is an experimental much faster emulator which now also has full
  1915. precision for the mantissa. It does not support any exceptions.
  1916. It is very simple, and approximately 3-6 times faster than NWFPE.
  1917. It should be sufficient for most programs. It may be not suitable
  1918. for scientific calculations, but you have to check this for yourself.
  1919. If you do not feel you need a faster FP emulation you should better
  1920. choose NWFPE.
  1921. config VFP
  1922. bool "VFP-format floating point maths"
  1923. depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  1924. help
  1925. Say Y to include VFP support code in the kernel. This is needed
  1926. if your hardware includes a VFP unit.
  1927. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  1928. release notes and additional status information.
  1929. Say N if your target does not have VFP hardware.
  1930. config VFPv3
  1931. bool
  1932. depends on VFP
  1933. default y if CPU_V7
  1934. config NEON
  1935. bool "Advanced SIMD (NEON) Extension support"
  1936. depends on VFPv3 && CPU_V7
  1937. help
  1938. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  1939. Extension.
  1940. endmenu
  1941. menu "Userspace binary formats"
  1942. source "fs/Kconfig.binfmt"
  1943. config ARTHUR
  1944. tristate "RISC OS personality"
  1945. depends on !AEABI
  1946. help
  1947. Say Y here to include the kernel code necessary if you want to run
  1948. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  1949. experimental; if this sounds frightening, say N and sleep in peace.
  1950. You can also say M here to compile this support as a module (which
  1951. will be called arthur).
  1952. endmenu
  1953. menu "Power management options"
  1954. source "kernel/power/Kconfig"
  1955. config ARCH_SUSPEND_POSSIBLE
  1956. depends on !ARCH_S5PC100
  1957. depends on CPU_ARM920T || CPU_ARM926T || CPU_SA1100 || \
  1958. CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE || CPU_MOHAWK
  1959. def_bool y
  1960. config ARM_CPU_SUSPEND
  1961. def_bool PM_SLEEP
  1962. endmenu
  1963. source "net/Kconfig"
  1964. source "drivers/Kconfig"
  1965. source "fs/Kconfig"
  1966. source "arch/arm/Kconfig.debug"
  1967. source "security/Kconfig"
  1968. source "crypto/Kconfig"
  1969. source "lib/Kconfig"
  1970. source "arch/arm/kvm/Kconfig"