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_CNS3XXX
  308. bool "Cavium Networks CNS3XXX family"
  309. select ARM_GIC
  310. select CPU_V6K
  311. select GENERIC_CLOCKEVENTS
  312. select MIGHT_HAVE_CACHE_L2X0
  313. select MIGHT_HAVE_PCI
  314. select PCI_DOMAINS if PCI
  315. help
  316. Support for Cavium Networks CNS3XXX platform.
  317. config ARCH_CLPS711X
  318. bool "Cirrus Logic CLPS711x/EP721x/EP731x-based"
  319. select ARCH_REQUIRE_GPIOLIB
  320. select AUTO_ZRELADDR
  321. select CLKDEV_LOOKUP
  322. select COMMON_CLK
  323. select CPU_ARM720T
  324. select GENERIC_CLOCKEVENTS
  325. select MULTI_IRQ_HANDLER
  326. select NEED_MACH_MEMORY_H
  327. select SPARSE_IRQ
  328. help
  329. Support for Cirrus Logic 711x/721x/731x based boards.
  330. config ARCH_GEMINI
  331. bool "Cortina Systems Gemini"
  332. select ARCH_REQUIRE_GPIOLIB
  333. select ARCH_USES_GETTIMEOFFSET
  334. select CPU_FA526
  335. help
  336. Support for the Cortina Systems Gemini family SoCs
  337. config ARCH_SIRF
  338. bool "CSR SiRF"
  339. select ARCH_REQUIRE_GPIOLIB
  340. select AUTO_ZRELADDR
  341. select COMMON_CLK
  342. select GENERIC_CLOCKEVENTS
  343. select GENERIC_IRQ_CHIP
  344. select MIGHT_HAVE_CACHE_L2X0
  345. select NO_IOPORT
  346. select PINCTRL
  347. select PINCTRL_SIRF
  348. select USE_OF
  349. help
  350. Support for CSR SiRFprimaII/Marco/Polo platforms
  351. config ARCH_EBSA110
  352. bool "EBSA-110"
  353. select ARCH_USES_GETTIMEOFFSET
  354. select CPU_SA110
  355. select ISA
  356. select NEED_MACH_IO_H
  357. select NEED_MACH_MEMORY_H
  358. select NO_IOPORT
  359. help
  360. This is an evaluation board for the StrongARM processor available
  361. from Digital. It has limited hardware on-board, including an
  362. Ethernet interface, two PCMCIA sockets, two serial ports and a
  363. parallel port.
  364. config ARCH_EP93XX
  365. bool "EP93xx-based"
  366. select ARCH_HAS_HOLES_MEMORYMODEL
  367. select ARCH_REQUIRE_GPIOLIB
  368. select ARCH_USES_GETTIMEOFFSET
  369. select ARM_AMBA
  370. select ARM_VIC
  371. select CLKDEV_LOOKUP
  372. select CPU_ARM920T
  373. select NEED_MACH_MEMORY_H
  374. help
  375. This enables support for the Cirrus EP93xx series of CPUs.
  376. config ARCH_FOOTBRIDGE
  377. bool "FootBridge"
  378. select CPU_SA110
  379. select FOOTBRIDGE
  380. select GENERIC_CLOCKEVENTS
  381. select HAVE_IDE
  382. select NEED_MACH_IO_H if !MMU
  383. select NEED_MACH_MEMORY_H
  384. help
  385. Support for systems based on the DC21285 companion chip
  386. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  387. config ARCH_MXS
  388. bool "Freescale MXS-based"
  389. select ARCH_REQUIRE_GPIOLIB
  390. select CLKDEV_LOOKUP
  391. select CLKSRC_MMIO
  392. select COMMON_CLK
  393. select GENERIC_CLOCKEVENTS
  394. select HAVE_CLK_PREPARE
  395. select MULTI_IRQ_HANDLER
  396. select PINCTRL
  397. select SPARSE_IRQ
  398. select USE_OF
  399. help
  400. Support for Freescale MXS-based family of processors
  401. config ARCH_NETX
  402. bool "Hilscher NetX based"
  403. select ARM_VIC
  404. select CLKSRC_MMIO
  405. select CPU_ARM926T
  406. select GENERIC_CLOCKEVENTS
  407. help
  408. This enables support for systems based on the Hilscher NetX Soc
  409. config ARCH_H720X
  410. bool "Hynix HMS720x-based"
  411. select ARCH_USES_GETTIMEOFFSET
  412. select CPU_ARM720T
  413. select ISA_DMA_API
  414. help
  415. This enables support for systems based on the Hynix HMS720x
  416. config ARCH_IOP13XX
  417. bool "IOP13xx-based"
  418. depends on MMU
  419. select ARCH_SUPPORTS_MSI
  420. select CPU_XSC3
  421. select NEED_MACH_MEMORY_H
  422. select NEED_RET_TO_USER
  423. select PCI
  424. select PLAT_IOP
  425. select VMSPLIT_1G
  426. help
  427. Support for Intel's IOP13XX (XScale) family of processors.
  428. config ARCH_IOP32X
  429. bool "IOP32x-based"
  430. depends on MMU
  431. select ARCH_REQUIRE_GPIOLIB
  432. select CPU_XSCALE
  433. select NEED_MACH_GPIO_H
  434. select NEED_RET_TO_USER
  435. select PCI
  436. select PLAT_IOP
  437. help
  438. Support for Intel's 80219 and IOP32X (XScale) family of
  439. processors.
  440. config ARCH_IOP33X
  441. bool "IOP33x-based"
  442. depends on MMU
  443. select ARCH_REQUIRE_GPIOLIB
  444. select CPU_XSCALE
  445. select NEED_MACH_GPIO_H
  446. select NEED_RET_TO_USER
  447. select PCI
  448. select PLAT_IOP
  449. help
  450. Support for Intel's IOP33X (XScale) family of processors.
  451. config ARCH_IXP4XX
  452. bool "IXP4xx-based"
  453. depends on MMU
  454. select ARCH_HAS_DMA_SET_COHERENT_MASK
  455. select ARCH_REQUIRE_GPIOLIB
  456. select CLKSRC_MMIO
  457. select CPU_XSCALE
  458. select DMABOUNCE if PCI
  459. select GENERIC_CLOCKEVENTS
  460. select MIGHT_HAVE_PCI
  461. select NEED_MACH_IO_H
  462. help
  463. Support for Intel's IXP4XX (XScale) family of processors.
  464. config ARCH_DOVE
  465. bool "Marvell Dove"
  466. select ARCH_REQUIRE_GPIOLIB
  467. select COMMON_CLK_DOVE
  468. select CPU_V7
  469. select GENERIC_CLOCKEVENTS
  470. select MIGHT_HAVE_PCI
  471. select PINCTRL
  472. select PINCTRL_DOVE
  473. select PLAT_ORION_LEGACY
  474. select USB_ARCH_HAS_EHCI
  475. help
  476. Support for the Marvell Dove SoC 88AP510
  477. config ARCH_KIRKWOOD
  478. bool "Marvell Kirkwood"
  479. select ARCH_REQUIRE_GPIOLIB
  480. select CPU_FEROCEON
  481. select GENERIC_CLOCKEVENTS
  482. select PCI
  483. select PCI_QUIRKS
  484. select PINCTRL
  485. select PINCTRL_KIRKWOOD
  486. select PLAT_ORION_LEGACY
  487. help
  488. Support for the following Marvell Kirkwood series SoCs:
  489. 88F6180, 88F6192 and 88F6281.
  490. config ARCH_MV78XX0
  491. bool "Marvell MV78xx0"
  492. select ARCH_REQUIRE_GPIOLIB
  493. select CPU_FEROCEON
  494. select GENERIC_CLOCKEVENTS
  495. select PCI
  496. select PLAT_ORION_LEGACY
  497. help
  498. Support for the following Marvell MV78xx0 series SoCs:
  499. MV781x0, MV782x0.
  500. config ARCH_ORION5X
  501. bool "Marvell Orion"
  502. depends on MMU
  503. select ARCH_REQUIRE_GPIOLIB
  504. select CPU_FEROCEON
  505. select GENERIC_CLOCKEVENTS
  506. select PCI
  507. select PLAT_ORION_LEGACY
  508. help
  509. Support for the following Marvell Orion 5x series SoCs:
  510. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  511. Orion-2 (5281), Orion-1-90 (6183).
  512. config ARCH_MMP
  513. bool "Marvell PXA168/910/MMP2"
  514. depends on MMU
  515. select ARCH_REQUIRE_GPIOLIB
  516. select CLKDEV_LOOKUP
  517. select GENERIC_ALLOCATOR
  518. select GENERIC_CLOCKEVENTS
  519. select GPIO_PXA
  520. select IRQ_DOMAIN
  521. select NEED_MACH_GPIO_H
  522. select PINCTRL
  523. select PLAT_PXA
  524. select SPARSE_IRQ
  525. help
  526. Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
  527. config ARCH_KS8695
  528. bool "Micrel/Kendin KS8695"
  529. select ARCH_REQUIRE_GPIOLIB
  530. select CLKSRC_MMIO
  531. select CPU_ARM922T
  532. select GENERIC_CLOCKEVENTS
  533. select NEED_MACH_MEMORY_H
  534. help
  535. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  536. System-on-Chip devices.
  537. config ARCH_W90X900
  538. bool "Nuvoton W90X900 CPU"
  539. select ARCH_REQUIRE_GPIOLIB
  540. select CLKDEV_LOOKUP
  541. select CLKSRC_MMIO
  542. select CPU_ARM926T
  543. select GENERIC_CLOCKEVENTS
  544. help
  545. Support for Nuvoton (Winbond logic dept.) ARM9 processor,
  546. At present, the w90x900 has been renamed nuc900, regarding
  547. the ARM series product line, you can login the following
  548. link address to know more.
  549. <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
  550. ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
  551. config ARCH_LPC32XX
  552. bool "NXP LPC32XX"
  553. select ARCH_REQUIRE_GPIOLIB
  554. select ARM_AMBA
  555. select CLKDEV_LOOKUP
  556. select CLKSRC_MMIO
  557. select CPU_ARM926T
  558. select GENERIC_CLOCKEVENTS
  559. select HAVE_IDE
  560. select HAVE_PWM
  561. select USB_ARCH_HAS_OHCI
  562. select USE_OF
  563. help
  564. Support for the NXP LPC32XX family of processors
  565. config ARCH_TEGRA
  566. bool "NVIDIA Tegra"
  567. select ARCH_HAS_CPUFREQ
  568. select ARCH_REQUIRE_GPIOLIB
  569. select CLKDEV_LOOKUP
  570. select CLKSRC_MMIO
  571. select CLKSRC_OF
  572. select COMMON_CLK
  573. select GENERIC_CLOCKEVENTS
  574. select HAVE_CLK
  575. select HAVE_SMP
  576. select MIGHT_HAVE_CACHE_L2X0
  577. select SPARSE_IRQ
  578. select USE_OF
  579. help
  580. This enables support for NVIDIA Tegra based systems (Tegra APX,
  581. Tegra 6xx and Tegra 2 series).
  582. config ARCH_PXA
  583. bool "PXA2xx/PXA3xx-based"
  584. depends on MMU
  585. select ARCH_HAS_CPUFREQ
  586. select ARCH_MTD_XIP
  587. select ARCH_REQUIRE_GPIOLIB
  588. select ARM_CPU_SUSPEND if PM
  589. select AUTO_ZRELADDR
  590. select CLKDEV_LOOKUP
  591. select CLKSRC_MMIO
  592. select GENERIC_CLOCKEVENTS
  593. select GPIO_PXA
  594. select HAVE_IDE
  595. select MULTI_IRQ_HANDLER
  596. select NEED_MACH_GPIO_H
  597. select PLAT_PXA
  598. select SPARSE_IRQ
  599. help
  600. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  601. config ARCH_MSM
  602. bool "Qualcomm MSM"
  603. select ARCH_REQUIRE_GPIOLIB
  604. select CLKDEV_LOOKUP
  605. select GENERIC_CLOCKEVENTS
  606. select HAVE_CLK
  607. help
  608. Support for Qualcomm MSM/QSD based systems. This runs on the
  609. apps processor of the MSM/QSD and depends on a shared memory
  610. interface to the modem processor which runs the baseband
  611. stack and controls some vital subsystems
  612. (clock and power control, etc).
  613. config ARCH_SHMOBILE
  614. bool "Renesas SH-Mobile / R-Mobile"
  615. select CLKDEV_LOOKUP
  616. select GENERIC_CLOCKEVENTS
  617. select HAVE_CLK
  618. select HAVE_MACH_CLKDEV
  619. select HAVE_SMP
  620. select MIGHT_HAVE_CACHE_L2X0
  621. select MULTI_IRQ_HANDLER
  622. select NEED_MACH_MEMORY_H
  623. select NO_IOPORT
  624. select PINCTRL
  625. select PM_GENERIC_DOMAINS if PM
  626. select SPARSE_IRQ
  627. help
  628. Support for Renesas's SH-Mobile and R-Mobile ARM platforms.
  629. config ARCH_RPC
  630. bool "RiscPC"
  631. select ARCH_ACORN
  632. select ARCH_MAY_HAVE_PC_FDC
  633. select ARCH_SPARSEMEM_ENABLE
  634. select ARCH_USES_GETTIMEOFFSET
  635. select FIQ
  636. select HAVE_IDE
  637. select HAVE_PATA_PLATFORM
  638. select ISA_DMA_API
  639. select NEED_MACH_IO_H
  640. select NEED_MACH_MEMORY_H
  641. select NO_IOPORT
  642. help
  643. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  644. CD-ROM interface, serial and parallel port, and the floppy drive.
  645. config ARCH_SA1100
  646. bool "SA1100-based"
  647. select ARCH_HAS_CPUFREQ
  648. select ARCH_MTD_XIP
  649. select ARCH_REQUIRE_GPIOLIB
  650. select ARCH_SPARSEMEM_ENABLE
  651. select CLKDEV_LOOKUP
  652. select CLKSRC_MMIO
  653. select CPU_FREQ
  654. select CPU_SA1100
  655. select GENERIC_CLOCKEVENTS
  656. select HAVE_IDE
  657. select ISA
  658. select NEED_MACH_GPIO_H
  659. select NEED_MACH_MEMORY_H
  660. select SPARSE_IRQ
  661. help
  662. Support for StrongARM 11x0 based boards.
  663. config ARCH_S3C24XX
  664. bool "Samsung S3C24XX SoCs"
  665. select ARCH_HAS_CPUFREQ
  666. select ARCH_USES_GETTIMEOFFSET
  667. select CLKDEV_LOOKUP
  668. select HAVE_CLK
  669. select HAVE_S3C2410_I2C if I2C
  670. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  671. select HAVE_S3C_RTC if RTC_CLASS
  672. select NEED_MACH_GPIO_H
  673. select NEED_MACH_IO_H
  674. help
  675. Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443
  676. and S3C2450 SoCs based systems, such as the Simtec Electronics BAST
  677. (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or the
  678. Samsung SMDK2410 development board (and derivatives).
  679. config ARCH_S3C64XX
  680. bool "Samsung S3C64XX"
  681. select ARCH_HAS_CPUFREQ
  682. select ARCH_REQUIRE_GPIOLIB
  683. select ARCH_USES_GETTIMEOFFSET
  684. select ARM_VIC
  685. select CLKDEV_LOOKUP
  686. select CPU_V6
  687. select HAVE_CLK
  688. select HAVE_S3C2410_I2C if I2C
  689. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  690. select HAVE_TCM
  691. select NEED_MACH_GPIO_H
  692. select NO_IOPORT
  693. select PLAT_SAMSUNG
  694. select S3C_DEV_NAND
  695. select S3C_GPIO_TRACK
  696. select SAMSUNG_CLKSRC
  697. select SAMSUNG_GPIOLIB_4BIT
  698. select SAMSUNG_IRQ_VIC_TIMER
  699. select USB_ARCH_HAS_OHCI
  700. help
  701. Samsung S3C64XX series based systems
  702. config ARCH_S5P64X0
  703. bool "Samsung S5P6440 S5P6450"
  704. select CLKDEV_LOOKUP
  705. select CLKSRC_MMIO
  706. select CPU_V6
  707. select GENERIC_CLOCKEVENTS
  708. select HAVE_CLK
  709. select HAVE_S3C2410_I2C if I2C
  710. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  711. select HAVE_S3C_RTC if RTC_CLASS
  712. select NEED_MACH_GPIO_H
  713. help
  714. Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
  715. SMDK6450.
  716. config ARCH_S5PC100
  717. bool "Samsung S5PC100"
  718. select ARCH_USES_GETTIMEOFFSET
  719. select CLKDEV_LOOKUP
  720. select CPU_V7
  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 S5PC100 series based systems
  728. config ARCH_S5PV210
  729. bool "Samsung S5PV210/S5PC110"
  730. select ARCH_HAS_CPUFREQ
  731. select ARCH_HAS_HOLES_MEMORYMODEL
  732. select ARCH_SPARSEMEM_ENABLE
  733. select CLKDEV_LOOKUP
  734. select CLKSRC_MMIO
  735. select CPU_V7
  736. select GENERIC_CLOCKEVENTS
  737. select HAVE_CLK
  738. select HAVE_S3C2410_I2C if I2C
  739. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  740. select HAVE_S3C_RTC if RTC_CLASS
  741. select NEED_MACH_GPIO_H
  742. select NEED_MACH_MEMORY_H
  743. help
  744. Samsung S5PV210/S5PC110 series based systems
  745. config ARCH_EXYNOS
  746. bool "Samsung EXYNOS"
  747. select ARCH_HAS_CPUFREQ
  748. select ARCH_HAS_HOLES_MEMORYMODEL
  749. select ARCH_SPARSEMEM_ENABLE
  750. select CLKDEV_LOOKUP
  751. select CPU_V7
  752. select GENERIC_CLOCKEVENTS
  753. select HAVE_CLK
  754. select HAVE_S3C2410_I2C if I2C
  755. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  756. select HAVE_S3C_RTC if RTC_CLASS
  757. select NEED_MACH_GPIO_H
  758. select NEED_MACH_MEMORY_H
  759. help
  760. Support for SAMSUNG's EXYNOS SoCs (EXYNOS4/5)
  761. config ARCH_SHARK
  762. bool "Shark"
  763. select ARCH_USES_GETTIMEOFFSET
  764. select CPU_SA110
  765. select ISA
  766. select ISA_DMA
  767. select NEED_MACH_MEMORY_H
  768. select PCI
  769. select ZONE_DMA
  770. help
  771. Support for the StrongARM based Digital DNARD machine, also known
  772. as "Shark" (<http://www.shark-linux.de/shark.html>).
  773. config ARCH_U300
  774. bool "ST-Ericsson U300 Series"
  775. depends on MMU
  776. select ARCH_REQUIRE_GPIOLIB
  777. select ARM_AMBA
  778. select ARM_PATCH_PHYS_VIRT
  779. select ARM_VIC
  780. select CLKDEV_LOOKUP
  781. select CLKSRC_MMIO
  782. select COMMON_CLK
  783. select CPU_ARM926T
  784. select GENERIC_CLOCKEVENTS
  785. select HAVE_TCM
  786. select SPARSE_IRQ
  787. help
  788. Support for ST-Ericsson U300 series mobile platforms.
  789. config ARCH_U8500
  790. bool "ST-Ericsson U8500 Series"
  791. depends on MMU
  792. select ARCH_HAS_CPUFREQ
  793. select ARCH_REQUIRE_GPIOLIB
  794. select ARM_AMBA
  795. select CLKDEV_LOOKUP
  796. select CPU_V7
  797. select GENERIC_CLOCKEVENTS
  798. select HAVE_SMP
  799. select MIGHT_HAVE_CACHE_L2X0
  800. select SPARSE_IRQ
  801. help
  802. Support for ST-Ericsson's Ux500 architecture
  803. config ARCH_NOMADIK
  804. bool "STMicroelectronics Nomadik"
  805. select ARCH_REQUIRE_GPIOLIB
  806. select ARM_AMBA
  807. select ARM_VIC
  808. select CLKSRC_NOMADIK_MTU
  809. select COMMON_CLK
  810. select CPU_ARM926T
  811. select GENERIC_CLOCKEVENTS
  812. select MIGHT_HAVE_CACHE_L2X0
  813. select USE_OF
  814. select PINCTRL
  815. select PINCTRL_STN8815
  816. select SPARSE_IRQ
  817. help
  818. Support for the Nomadik platform by ST-Ericsson
  819. config PLAT_SPEAR
  820. bool "ST SPEAr"
  821. select ARCH_HAS_CPUFREQ
  822. select ARCH_REQUIRE_GPIOLIB
  823. select ARM_AMBA
  824. select CLKDEV_LOOKUP
  825. select CLKSRC_MMIO
  826. select COMMON_CLK
  827. select GENERIC_CLOCKEVENTS
  828. select HAVE_CLK
  829. help
  830. Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
  831. config ARCH_DAVINCI
  832. bool "TI DaVinci"
  833. select ARCH_HAS_HOLES_MEMORYMODEL
  834. select ARCH_REQUIRE_GPIOLIB
  835. select CLKDEV_LOOKUP
  836. select GENERIC_ALLOCATOR
  837. select GENERIC_CLOCKEVENTS
  838. select GENERIC_IRQ_CHIP
  839. select HAVE_IDE
  840. select NEED_MACH_GPIO_H
  841. select USE_OF
  842. select ZONE_DMA
  843. help
  844. Support for TI's DaVinci platform.
  845. config ARCH_OMAP1
  846. bool "TI OMAP1"
  847. depends on MMU
  848. select ARCH_HAS_CPUFREQ
  849. select ARCH_HAS_HOLES_MEMORYMODEL
  850. select ARCH_OMAP
  851. select ARCH_REQUIRE_GPIOLIB
  852. select CLKDEV_LOOKUP
  853. select CLKSRC_MMIO
  854. select GENERIC_CLOCKEVENTS
  855. select GENERIC_IRQ_CHIP
  856. select HAVE_CLK
  857. select HAVE_IDE
  858. select IRQ_DOMAIN
  859. select NEED_MACH_IO_H if PCCARD
  860. select NEED_MACH_MEMORY_H
  861. help
  862. Support for older TI OMAP1 (omap7xx, omap15xx or omap16xx)
  863. endchoice
  864. menu "Multiple platform selection"
  865. depends on ARCH_MULTIPLATFORM
  866. comment "CPU Core family selection"
  867. config ARCH_MULTI_V4
  868. bool "ARMv4 based platforms (FA526, StrongARM)"
  869. depends on !ARCH_MULTI_V6_V7
  870. select ARCH_MULTI_V4_V5
  871. config ARCH_MULTI_V4T
  872. bool "ARMv4T based platforms (ARM720T, ARM920T, ...)"
  873. depends on !ARCH_MULTI_V6_V7
  874. select ARCH_MULTI_V4_V5
  875. config ARCH_MULTI_V5
  876. bool "ARMv5 based platforms (ARM926T, XSCALE, PJ1, ...)"
  877. depends on !ARCH_MULTI_V6_V7
  878. select ARCH_MULTI_V4_V5
  879. config ARCH_MULTI_V4_V5
  880. bool
  881. config ARCH_MULTI_V6
  882. bool "ARMv6 based platforms (ARM11, Scorpion, ...)"
  883. select ARCH_MULTI_V6_V7
  884. select CPU_V6
  885. config ARCH_MULTI_V7
  886. bool "ARMv7 based platforms (Cortex-A, PJ4, Krait)"
  887. default y
  888. select ARCH_MULTI_V6_V7
  889. select ARCH_VEXPRESS
  890. select CPU_V7
  891. config ARCH_MULTI_V6_V7
  892. bool
  893. config ARCH_MULTI_CPU_AUTO
  894. def_bool !(ARCH_MULTI_V4 || ARCH_MULTI_V4T || ARCH_MULTI_V6_V7)
  895. select ARCH_MULTI_V5
  896. endmenu
  897. #
  898. # This is sorted alphabetically by mach-* pathname. However, plat-*
  899. # Kconfigs may be included either alphabetically (according to the
  900. # plat- suffix) or along side the corresponding mach-* source.
  901. #
  902. source "arch/arm/mach-mvebu/Kconfig"
  903. source "arch/arm/mach-at91/Kconfig"
  904. source "arch/arm/mach-bcm/Kconfig"
  905. source "arch/arm/mach-bcm2835/Kconfig"
  906. source "arch/arm/mach-clps711x/Kconfig"
  907. source "arch/arm/mach-cns3xxx/Kconfig"
  908. source "arch/arm/mach-davinci/Kconfig"
  909. source "arch/arm/mach-dove/Kconfig"
  910. source "arch/arm/mach-ep93xx/Kconfig"
  911. source "arch/arm/mach-footbridge/Kconfig"
  912. source "arch/arm/mach-gemini/Kconfig"
  913. source "arch/arm/mach-h720x/Kconfig"
  914. source "arch/arm/mach-highbank/Kconfig"
  915. source "arch/arm/mach-integrator/Kconfig"
  916. source "arch/arm/mach-iop32x/Kconfig"
  917. source "arch/arm/mach-iop33x/Kconfig"
  918. source "arch/arm/mach-iop13xx/Kconfig"
  919. source "arch/arm/mach-ixp4xx/Kconfig"
  920. source "arch/arm/mach-kirkwood/Kconfig"
  921. source "arch/arm/mach-ks8695/Kconfig"
  922. source "arch/arm/mach-msm/Kconfig"
  923. source "arch/arm/mach-mv78xx0/Kconfig"
  924. source "arch/arm/mach-imx/Kconfig"
  925. source "arch/arm/mach-mxs/Kconfig"
  926. source "arch/arm/mach-netx/Kconfig"
  927. source "arch/arm/mach-nomadik/Kconfig"
  928. source "arch/arm/plat-omap/Kconfig"
  929. source "arch/arm/mach-omap1/Kconfig"
  930. source "arch/arm/mach-omap2/Kconfig"
  931. source "arch/arm/mach-orion5x/Kconfig"
  932. source "arch/arm/mach-picoxcell/Kconfig"
  933. source "arch/arm/mach-pxa/Kconfig"
  934. source "arch/arm/plat-pxa/Kconfig"
  935. source "arch/arm/mach-mmp/Kconfig"
  936. source "arch/arm/mach-realview/Kconfig"
  937. source "arch/arm/mach-sa1100/Kconfig"
  938. source "arch/arm/plat-samsung/Kconfig"
  939. source "arch/arm/mach-socfpga/Kconfig"
  940. source "arch/arm/plat-spear/Kconfig"
  941. source "arch/arm/mach-s3c24xx/Kconfig"
  942. if ARCH_S3C64XX
  943. source "arch/arm/mach-s3c64xx/Kconfig"
  944. endif
  945. source "arch/arm/mach-s5p64x0/Kconfig"
  946. source "arch/arm/mach-s5pc100/Kconfig"
  947. source "arch/arm/mach-s5pv210/Kconfig"
  948. source "arch/arm/mach-exynos/Kconfig"
  949. source "arch/arm/mach-shmobile/Kconfig"
  950. source "arch/arm/mach-sunxi/Kconfig"
  951. source "arch/arm/mach-prima2/Kconfig"
  952. source "arch/arm/mach-tegra/Kconfig"
  953. source "arch/arm/mach-u300/Kconfig"
  954. source "arch/arm/mach-ux500/Kconfig"
  955. source "arch/arm/mach-versatile/Kconfig"
  956. source "arch/arm/mach-vexpress/Kconfig"
  957. source "arch/arm/plat-versatile/Kconfig"
  958. source "arch/arm/mach-virt/Kconfig"
  959. source "arch/arm/mach-vt8500/Kconfig"
  960. source "arch/arm/mach-w90x900/Kconfig"
  961. source "arch/arm/mach-zynq/Kconfig"
  962. # Definitions to make life easier
  963. config ARCH_ACORN
  964. bool
  965. config PLAT_IOP
  966. bool
  967. select GENERIC_CLOCKEVENTS
  968. config PLAT_ORION
  969. bool
  970. select CLKSRC_MMIO
  971. select COMMON_CLK
  972. select GENERIC_IRQ_CHIP
  973. select IRQ_DOMAIN
  974. config PLAT_ORION_LEGACY
  975. bool
  976. select PLAT_ORION
  977. config PLAT_PXA
  978. bool
  979. config PLAT_VERSATILE
  980. bool
  981. config ARM_TIMER_SP804
  982. bool
  983. select CLKSRC_MMIO
  984. select HAVE_SCHED_CLOCK
  985. source arch/arm/mm/Kconfig
  986. config ARM_NR_BANKS
  987. int
  988. default 16 if ARCH_EP93XX
  989. default 8
  990. config IWMMXT
  991. bool "Enable iWMMXt support"
  992. depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
  993. default y if PXA27x || PXA3xx || ARCH_MMP
  994. help
  995. Enable support for iWMMXt context switching at run time if
  996. running on a CPU that supports it.
  997. config XSCALE_PMU
  998. bool
  999. depends on CPU_XSCALE
  1000. default y
  1001. config MULTI_IRQ_HANDLER
  1002. bool
  1003. help
  1004. Allow each machine to specify it's own IRQ handler at run time.
  1005. if !MMU
  1006. source "arch/arm/Kconfig-nommu"
  1007. endif
  1008. config ARM_ERRATA_326103
  1009. bool "ARM errata: FSR write bit incorrect on a SWP to read-only memory"
  1010. depends on CPU_V6
  1011. help
  1012. Executing a SWP instruction to read-only memory does not set bit 11
  1013. of the FSR on the ARM 1136 prior to r1p0. This causes the kernel to
  1014. treat the access as a read, preventing a COW from occurring and
  1015. causing the faulting task to livelock.
  1016. config ARM_ERRATA_411920
  1017. bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
  1018. depends on CPU_V6 || CPU_V6K
  1019. help
  1020. Invalidation of the Instruction Cache operation can
  1021. fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
  1022. It does not affect the MPCore. This option enables the ARM Ltd.
  1023. recommended workaround.
  1024. config ARM_ERRATA_430973
  1025. bool "ARM errata: Stale prediction on replaced interworking branch"
  1026. depends on CPU_V7
  1027. help
  1028. This option enables the workaround for the 430973 Cortex-A8
  1029. (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
  1030. interworking branch is replaced with another code sequence at the
  1031. same virtual address, whether due to self-modifying code or virtual
  1032. to physical address re-mapping, Cortex-A8 does not recover from the
  1033. stale interworking branch prediction. This results in Cortex-A8
  1034. executing the new code sequence in the incorrect ARM or Thumb state.
  1035. The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
  1036. and also flushes the branch target cache at every context switch.
  1037. Note that setting specific bits in the ACTLR register may not be
  1038. available in non-secure mode.
  1039. config ARM_ERRATA_458693
  1040. bool "ARM errata: Processor deadlock when a false hazard is created"
  1041. depends on CPU_V7
  1042. depends on !ARCH_MULTIPLATFORM
  1043. help
  1044. This option enables the workaround for the 458693 Cortex-A8 (r2p0)
  1045. erratum. For very specific sequences of memory operations, it is
  1046. possible for a hazard condition intended for a cache line to instead
  1047. be incorrectly associated with a different cache line. This false
  1048. hazard might then cause a processor deadlock. The workaround enables
  1049. the L1 caching of the NEON accesses and disables the PLD instruction
  1050. in the ACTLR register. Note that setting specific bits in the ACTLR
  1051. register may not be available in non-secure mode.
  1052. config ARM_ERRATA_460075
  1053. bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
  1054. depends on CPU_V7
  1055. depends on !ARCH_MULTIPLATFORM
  1056. help
  1057. This option enables the workaround for the 460075 Cortex-A8 (r2p0)
  1058. erratum. Any asynchronous access to the L2 cache may encounter a
  1059. situation in which recent store transactions to the L2 cache are lost
  1060. and overwritten with stale memory contents from external memory. The
  1061. workaround disables the write-allocate mode for the L2 cache via the
  1062. ACTLR register. Note that setting specific bits in the ACTLR register
  1063. may not be available in non-secure mode.
  1064. config ARM_ERRATA_742230
  1065. bool "ARM errata: DMB operation may be faulty"
  1066. depends on CPU_V7 && SMP
  1067. depends on !ARCH_MULTIPLATFORM
  1068. help
  1069. This option enables the workaround for the 742230 Cortex-A9
  1070. (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
  1071. between two write operations may not ensure the correct visibility
  1072. ordering of the two writes. This workaround sets a specific bit in
  1073. the diagnostic register of the Cortex-A9 which causes the DMB
  1074. instruction to behave as a DSB, ensuring the correct behaviour of
  1075. the two writes.
  1076. config ARM_ERRATA_742231
  1077. bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
  1078. depends on CPU_V7 && SMP
  1079. depends on !ARCH_MULTIPLATFORM
  1080. help
  1081. This option enables the workaround for the 742231 Cortex-A9
  1082. (r2p0..r2p2) erratum. Under certain conditions, specific to the
  1083. Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
  1084. accessing some data located in the same cache line, may get corrupted
  1085. data due to bad handling of the address hazard when the line gets
  1086. replaced from one of the CPUs at the same time as another CPU is
  1087. accessing it. This workaround sets specific bits in the diagnostic
  1088. register of the Cortex-A9 which reduces the linefill issuing
  1089. capabilities of the processor.
  1090. config PL310_ERRATA_588369
  1091. bool "PL310 errata: Clean & Invalidate maintenance operations do not invalidate clean lines"
  1092. depends on CACHE_L2X0
  1093. help
  1094. The PL310 L2 cache controller implements three types of Clean &
  1095. Invalidate maintenance operations: by Physical Address
  1096. (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
  1097. They are architecturally defined to behave as the execution of a
  1098. clean operation followed immediately by an invalidate operation,
  1099. both performing to the same memory location. This functionality
  1100. is not correctly implemented in PL310 as clean lines are not
  1101. invalidated as a result of these operations.
  1102. config ARM_ERRATA_720789
  1103. bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
  1104. depends on CPU_V7
  1105. help
  1106. This option enables the workaround for the 720789 Cortex-A9 (prior to
  1107. r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
  1108. broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
  1109. As a consequence of this erratum, some TLB entries which should be
  1110. invalidated are not, resulting in an incoherency in the system page
  1111. tables. The workaround changes the TLB flushing routines to invalidate
  1112. entries regardless of the ASID.
  1113. config PL310_ERRATA_727915
  1114. bool "PL310 errata: Background Clean & Invalidate by Way operation can cause data corruption"
  1115. depends on CACHE_L2X0
  1116. help
  1117. PL310 implements the Clean & Invalidate by Way L2 cache maintenance
  1118. operation (offset 0x7FC). This operation runs in background so that
  1119. PL310 can handle normal accesses while it is in progress. Under very
  1120. rare circumstances, due to this erratum, write data can be lost when
  1121. PL310 treats a cacheable write transaction during a Clean &
  1122. Invalidate by Way operation.
  1123. config ARM_ERRATA_743622
  1124. bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
  1125. depends on CPU_V7
  1126. depends on !ARCH_MULTIPLATFORM
  1127. help
  1128. This option enables the workaround for the 743622 Cortex-A9
  1129. (r2p*) erratum. Under very rare conditions, a faulty
  1130. optimisation in the Cortex-A9 Store Buffer may lead to data
  1131. corruption. This workaround sets a specific bit in the diagnostic
  1132. register of the Cortex-A9 which disables the Store Buffer
  1133. optimisation, preventing the defect from occurring. This has no
  1134. visible impact on the overall performance or power consumption of the
  1135. processor.
  1136. config ARM_ERRATA_751472
  1137. bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
  1138. depends on CPU_V7
  1139. depends on !ARCH_MULTIPLATFORM
  1140. help
  1141. This option enables the workaround for the 751472 Cortex-A9 (prior
  1142. to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
  1143. completion of a following broadcasted operation if the second
  1144. operation is received by a CPU before the ICIALLUIS has completed,
  1145. potentially leading to corrupted entries in the cache or TLB.
  1146. config PL310_ERRATA_753970
  1147. bool "PL310 errata: cache sync operation may be faulty"
  1148. depends on CACHE_PL310
  1149. help
  1150. This option enables the workaround for the 753970 PL310 (r3p0) erratum.
  1151. Under some condition the effect of cache sync operation on
  1152. the store buffer still remains when the operation completes.
  1153. This means that the store buffer is always asked to drain and
  1154. this prevents it from merging any further writes. The workaround
  1155. is to replace the normal offset of cache sync operation (0x730)
  1156. by another offset targeting an unmapped PL310 register 0x740.
  1157. This has the same effect as the cache sync operation: store buffer
  1158. drain and waiting for all buffers empty.
  1159. config ARM_ERRATA_754322
  1160. bool "ARM errata: possible faulty MMU translations following an ASID switch"
  1161. depends on CPU_V7
  1162. help
  1163. This option enables the workaround for the 754322 Cortex-A9 (r2p*,
  1164. r3p*) erratum. A speculative memory access may cause a page table walk
  1165. which starts prior to an ASID switch but completes afterwards. This
  1166. can populate the micro-TLB with a stale entry which may be hit with
  1167. the new ASID. This workaround places two dsb instructions in the mm
  1168. switching code so that no page table walks can cross the ASID switch.
  1169. config ARM_ERRATA_754327
  1170. bool "ARM errata: no automatic Store Buffer drain"
  1171. depends on CPU_V7 && SMP
  1172. help
  1173. This option enables the workaround for the 754327 Cortex-A9 (prior to
  1174. r2p0) erratum. The Store Buffer does not have any automatic draining
  1175. mechanism and therefore a livelock may occur if an external agent
  1176. continuously polls a memory location waiting to observe an update.
  1177. This workaround defines cpu_relax() as smp_mb(), preventing correctly
  1178. written polling loops from denying visibility of updates to memory.
  1179. config ARM_ERRATA_364296
  1180. bool "ARM errata: Possible cache data corruption with hit-under-miss enabled"
  1181. depends on CPU_V6 && !SMP
  1182. help
  1183. This options enables the workaround for the 364296 ARM1136
  1184. r0p2 erratum (possible cache data corruption with
  1185. hit-under-miss enabled). It sets the undocumented bit 31 in
  1186. the auxiliary control register and the FI bit in the control
  1187. register, thus disabling hit-under-miss without putting the
  1188. processor into full low interrupt latency mode. ARM11MPCore
  1189. is not affected.
  1190. config ARM_ERRATA_764369
  1191. bool "ARM errata: Data cache line maintenance operation by MVA may not succeed"
  1192. depends on CPU_V7 && SMP
  1193. help
  1194. This option enables the workaround for erratum 764369
  1195. affecting Cortex-A9 MPCore with two or more processors (all
  1196. current revisions). Under certain timing circumstances, a data
  1197. cache line maintenance operation by MVA targeting an Inner
  1198. Shareable memory region may fail to proceed up to either the
  1199. Point of Coherency or to the Point of Unification of the
  1200. system. This workaround adds a DSB instruction before the
  1201. relevant cache maintenance functions and sets a specific bit
  1202. in the diagnostic control register of the SCU.
  1203. config PL310_ERRATA_769419
  1204. bool "PL310 errata: no automatic Store Buffer drain"
  1205. depends on CACHE_L2X0
  1206. help
  1207. On revisions of the PL310 prior to r3p2, the Store Buffer does
  1208. not automatically drain. This can cause normal, non-cacheable
  1209. writes to be retained when the memory system is idle, leading
  1210. to suboptimal I/O performance for drivers using coherent DMA.
  1211. This option adds a write barrier to the cpu_idle loop so that,
  1212. on systems with an outer cache, the store buffer is drained
  1213. explicitly.
  1214. config ARM_ERRATA_775420
  1215. bool "ARM errata: A data cache maintenance operation which aborts, might lead to deadlock"
  1216. depends on CPU_V7
  1217. help
  1218. This option enables the workaround for the 775420 Cortex-A9 (r2p2,
  1219. r2p6,r2p8,r2p10,r3p0) erratum. In case a date cache maintenance
  1220. operation aborts with MMU exception, it might cause the processor
  1221. to deadlock. This workaround puts DSB before executing ISB if
  1222. an abort may occur on cache maintenance.
  1223. endmenu
  1224. source "arch/arm/common/Kconfig"
  1225. menu "Bus support"
  1226. config ARM_AMBA
  1227. bool
  1228. config ISA
  1229. bool
  1230. help
  1231. Find out whether you have ISA slots on your motherboard. ISA is the
  1232. name of a bus system, i.e. the way the CPU talks to the other stuff
  1233. inside your box. Other bus systems are PCI, EISA, MicroChannel
  1234. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  1235. newer boards don't support it. If you have ISA, say Y, otherwise N.
  1236. # Select ISA DMA controller support
  1237. config ISA_DMA
  1238. bool
  1239. select ISA_DMA_API
  1240. config ARCH_NO_VIRT_TO_BUS
  1241. def_bool y
  1242. depends on !ARCH_RPC && !ARCH_NETWINDER && !ARCH_SHARK
  1243. # Select ISA DMA interface
  1244. config ISA_DMA_API
  1245. bool
  1246. config PCI
  1247. bool "PCI support" if MIGHT_HAVE_PCI
  1248. help
  1249. Find out whether you have a PCI motherboard. PCI is the name of a
  1250. bus system, i.e. the way the CPU talks to the other stuff inside
  1251. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  1252. VESA. If you have PCI, say Y, otherwise N.
  1253. config PCI_DOMAINS
  1254. bool
  1255. depends on PCI
  1256. config PCI_NANOENGINE
  1257. bool "BSE nanoEngine PCI support"
  1258. depends on SA1100_NANOENGINE
  1259. help
  1260. Enable PCI on the BSE nanoEngine board.
  1261. config PCI_SYSCALL
  1262. def_bool PCI
  1263. # Select the host bridge type
  1264. config PCI_HOST_VIA82C505
  1265. bool
  1266. depends on PCI && ARCH_SHARK
  1267. default y
  1268. config PCI_HOST_ITE8152
  1269. bool
  1270. depends on PCI && MACH_ARMCORE
  1271. default y
  1272. select DMABOUNCE
  1273. source "drivers/pci/Kconfig"
  1274. source "drivers/pcmcia/Kconfig"
  1275. endmenu
  1276. menu "Kernel Features"
  1277. config HAVE_SMP
  1278. bool
  1279. help
  1280. This option should be selected by machines which have an SMP-
  1281. capable CPU.
  1282. The only effect of this option is to make the SMP-related
  1283. options available to the user for configuration.
  1284. config SMP
  1285. bool "Symmetric Multi-Processing"
  1286. depends on CPU_V6K || CPU_V7
  1287. depends on GENERIC_CLOCKEVENTS
  1288. depends on HAVE_SMP
  1289. depends on MMU
  1290. select HAVE_ARM_SCU if !ARCH_MSM_SCORPIONMP
  1291. select USE_GENERIC_SMP_HELPERS
  1292. help
  1293. This enables support for systems with more than one CPU. If you have
  1294. a system with only one CPU, like most personal computers, say N. If
  1295. you have a system with more than one CPU, say Y.
  1296. If you say N here, the kernel will run on single and multiprocessor
  1297. machines, but will use only one CPU of a multiprocessor machine. If
  1298. you say Y here, the kernel will run on many, but not all, single
  1299. processor machines. On a single processor machine, the kernel will
  1300. run faster if you say N here.
  1301. See also <file:Documentation/x86/i386/IO-APIC.txt>,
  1302. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  1303. <http://tldp.org/HOWTO/SMP-HOWTO.html>.
  1304. If you don't know what to do here, say N.
  1305. config SMP_ON_UP
  1306. bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
  1307. depends on SMP && !XIP_KERNEL
  1308. default y
  1309. help
  1310. SMP kernels contain instructions which fail on non-SMP processors.
  1311. Enabling this option allows the kernel to modify itself to make
  1312. these instructions safe. Disabling it allows about 1K of space
  1313. savings.
  1314. If you don't know what to do here, say Y.
  1315. config ARM_CPU_TOPOLOGY
  1316. bool "Support cpu topology definition"
  1317. depends on SMP && CPU_V7
  1318. default y
  1319. help
  1320. Support ARM cpu topology definition. The MPIDR register defines
  1321. affinity between processors which is then used to describe the cpu
  1322. topology of an ARM System.
  1323. config SCHED_MC
  1324. bool "Multi-core scheduler support"
  1325. depends on ARM_CPU_TOPOLOGY
  1326. help
  1327. Multi-core scheduler support improves the CPU scheduler's decision
  1328. making when dealing with multi-core CPU chips at a cost of slightly
  1329. increased overhead in some places. If unsure say N here.
  1330. config SCHED_SMT
  1331. bool "SMT scheduler support"
  1332. depends on ARM_CPU_TOPOLOGY
  1333. help
  1334. Improves the CPU scheduler's decision making when dealing with
  1335. MultiThreading at a cost of slightly increased overhead in some
  1336. places. If unsure say N here.
  1337. config HAVE_ARM_SCU
  1338. bool
  1339. help
  1340. This option enables support for the ARM system coherency unit
  1341. config HAVE_ARM_ARCH_TIMER
  1342. bool "Architected timer support"
  1343. depends on CPU_V7
  1344. select ARM_ARCH_TIMER
  1345. help
  1346. This option enables support for the ARM architected timer
  1347. config HAVE_ARM_TWD
  1348. bool
  1349. depends on SMP
  1350. help
  1351. This options enables support for the ARM timer and watchdog unit
  1352. choice
  1353. prompt "Memory split"
  1354. default VMSPLIT_3G
  1355. help
  1356. Select the desired split between kernel and user memory.
  1357. If you are not absolutely sure what you are doing, leave this
  1358. option alone!
  1359. config VMSPLIT_3G
  1360. bool "3G/1G user/kernel split"
  1361. config VMSPLIT_2G
  1362. bool "2G/2G user/kernel split"
  1363. config VMSPLIT_1G
  1364. bool "1G/3G user/kernel split"
  1365. endchoice
  1366. config PAGE_OFFSET
  1367. hex
  1368. default 0x40000000 if VMSPLIT_1G
  1369. default 0x80000000 if VMSPLIT_2G
  1370. default 0xC0000000
  1371. config NR_CPUS
  1372. int "Maximum number of CPUs (2-32)"
  1373. range 2 32
  1374. depends on SMP
  1375. default "4"
  1376. config HOTPLUG_CPU
  1377. bool "Support for hot-pluggable CPUs"
  1378. depends on SMP && HOTPLUG
  1379. help
  1380. Say Y here to experiment with turning CPUs off and on. CPUs
  1381. can be controlled through /sys/devices/system/cpu.
  1382. config ARM_PSCI
  1383. bool "Support for the ARM Power State Coordination Interface (PSCI)"
  1384. depends on CPU_V7
  1385. help
  1386. Say Y here if you want Linux to communicate with system firmware
  1387. implementing the PSCI specification for CPU-centric power
  1388. management operations described in ARM document number ARM DEN
  1389. 0022A ("Power State Coordination Interface System Software on
  1390. ARM processors").
  1391. config LOCAL_TIMERS
  1392. bool "Use local timer interrupts"
  1393. depends on SMP
  1394. default y
  1395. select HAVE_ARM_TWD if (!ARCH_MSM_SCORPIONMP && !EXYNOS4_MCT)
  1396. help
  1397. Enable support for local timers on SMP platforms, rather then the
  1398. legacy IPI broadcast method. Local timers allows the system
  1399. accounting to be spread across the timer interval, preventing a
  1400. "thundering herd" at every timer tick.
  1401. config ARCH_NR_GPIO
  1402. int
  1403. default 1024 if ARCH_SHMOBILE || ARCH_TEGRA
  1404. default 355 if ARCH_U8500
  1405. default 264 if MACH_H4700
  1406. default 512 if SOC_OMAP5
  1407. default 288 if ARCH_VT8500 || ARCH_SUNXI
  1408. default 0
  1409. help
  1410. Maximum number of GPIOs in the system.
  1411. If unsure, leave the default value.
  1412. source kernel/Kconfig.preempt
  1413. config HZ
  1414. int
  1415. default 200 if ARCH_EBSA110 || ARCH_S3C24XX || ARCH_S5P64X0 || \
  1416. ARCH_S5PV210 || ARCH_EXYNOS4
  1417. default AT91_TIMER_HZ if ARCH_AT91
  1418. default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
  1419. default 100
  1420. config SCHED_HRTICK
  1421. def_bool HIGH_RES_TIMERS
  1422. config THUMB2_KERNEL
  1423. bool "Compile the kernel in Thumb-2 mode"
  1424. depends on CPU_V7 && !CPU_V6 && !CPU_V6K
  1425. select AEABI
  1426. select ARM_ASM_UNIFIED
  1427. select ARM_UNWIND
  1428. help
  1429. By enabling this option, the kernel will be compiled in
  1430. Thumb-2 mode. A compiler/assembler that understand the unified
  1431. ARM-Thumb syntax is needed.
  1432. If unsure, say N.
  1433. config THUMB2_AVOID_R_ARM_THM_JUMP11
  1434. bool "Work around buggy Thumb-2 short branch relocations in gas"
  1435. depends on THUMB2_KERNEL && MODULES
  1436. default y
  1437. help
  1438. Various binutils versions can resolve Thumb-2 branches to
  1439. locally-defined, preemptible global symbols as short-range "b.n"
  1440. branch instructions.
  1441. This is a problem, because there's no guarantee the final
  1442. destination of the symbol, or any candidate locations for a
  1443. trampoline, are within range of the branch. For this reason, the
  1444. kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
  1445. relocation in modules at all, and it makes little sense to add
  1446. support.
  1447. The symptom is that the kernel fails with an "unsupported
  1448. relocation" error when loading some modules.
  1449. Until fixed tools are available, passing
  1450. -fno-optimize-sibling-calls to gcc should prevent gcc generating
  1451. code which hits this problem, at the cost of a bit of extra runtime
  1452. stack usage in some cases.
  1453. The problem is described in more detail at:
  1454. https://bugs.launchpad.net/binutils-linaro/+bug/725126
  1455. Only Thumb-2 kernels are affected.
  1456. Unless you are sure your tools don't have this problem, say Y.
  1457. config ARM_ASM_UNIFIED
  1458. bool
  1459. config AEABI
  1460. bool "Use the ARM EABI to compile the kernel"
  1461. help
  1462. This option allows for the kernel to be compiled using the latest
  1463. ARM ABI (aka EABI). This is only useful if you are using a user
  1464. space environment that is also compiled with EABI.
  1465. Since there are major incompatibilities between the legacy ABI and
  1466. EABI, especially with regard to structure member alignment, this
  1467. option also changes the kernel syscall calling convention to
  1468. disambiguate both ABIs and allow for backward compatibility support
  1469. (selected with CONFIG_OABI_COMPAT).
  1470. To use this you need GCC version 4.0.0 or later.
  1471. config OABI_COMPAT
  1472. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  1473. depends on AEABI && !THUMB2_KERNEL
  1474. default y
  1475. help
  1476. This option preserves the old syscall interface along with the
  1477. new (ARM EABI) one. It also provides a compatibility layer to
  1478. intercept syscalls that have structure arguments which layout
  1479. in memory differs between the legacy ABI and the new ARM EABI
  1480. (only for non "thumb" binaries). This option adds a tiny
  1481. overhead to all syscalls and produces a slightly larger kernel.
  1482. If you know you'll be using only pure EABI user space then you
  1483. can say N here. If this option is not selected and you attempt
  1484. to execute a legacy ABI binary then the result will be
  1485. UNPREDICTABLE (in fact it can be predicted that it won't work
  1486. at all). If in doubt say Y.
  1487. config ARCH_HAS_HOLES_MEMORYMODEL
  1488. bool
  1489. config ARCH_SPARSEMEM_ENABLE
  1490. bool
  1491. config ARCH_SPARSEMEM_DEFAULT
  1492. def_bool ARCH_SPARSEMEM_ENABLE
  1493. config ARCH_SELECT_MEMORY_MODEL
  1494. def_bool ARCH_SPARSEMEM_ENABLE
  1495. config HAVE_ARCH_PFN_VALID
  1496. def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
  1497. config HIGHMEM
  1498. bool "High Memory Support"
  1499. depends on MMU
  1500. help
  1501. The address space of ARM processors is only 4 Gigabytes large
  1502. and it has to accommodate user address space, kernel address
  1503. space as well as some memory mapped IO. That means that, if you
  1504. have a large amount of physical memory and/or IO, not all of the
  1505. memory can be "permanently mapped" by the kernel. The physical
  1506. memory that is not permanently mapped is called "high memory".
  1507. Depending on the selected kernel/user memory split, minimum
  1508. vmalloc space and actual amount of RAM, you may not need this
  1509. option which should result in a slightly faster kernel.
  1510. If unsure, say n.
  1511. config HIGHPTE
  1512. bool "Allocate 2nd-level pagetables from highmem"
  1513. depends on HIGHMEM
  1514. config HW_PERF_EVENTS
  1515. bool "Enable hardware performance counter support for perf events"
  1516. depends on PERF_EVENTS
  1517. default y
  1518. help
  1519. Enable hardware performance counter support for perf events. If
  1520. disabled, perf events will use software events only.
  1521. source "mm/Kconfig"
  1522. config FORCE_MAX_ZONEORDER
  1523. int "Maximum zone order" if ARCH_SHMOBILE
  1524. range 11 64 if ARCH_SHMOBILE
  1525. default "12" if SOC_AM33XX
  1526. default "9" if SA1111
  1527. default "11"
  1528. help
  1529. The kernel memory allocator divides physically contiguous memory
  1530. blocks into "zones", where each zone is a power of two number of
  1531. pages. This option selects the largest power of two that the kernel
  1532. keeps in the memory allocator. If you need to allocate very large
  1533. blocks of physically contiguous memory, then you may need to
  1534. increase this value.
  1535. This config option is actually maximum order plus one. For example,
  1536. a value of 11 means that the largest free memory block is 2^10 pages.
  1537. config ALIGNMENT_TRAP
  1538. bool
  1539. depends on CPU_CP15_MMU
  1540. default y if !ARCH_EBSA110
  1541. select HAVE_PROC_CPU if PROC_FS
  1542. help
  1543. ARM processors cannot fetch/store information which is not
  1544. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  1545. address divisible by 4. On 32-bit ARM processors, these non-aligned
  1546. fetch/store instructions will be emulated in software if you say
  1547. here, which has a severe performance impact. This is necessary for
  1548. correct operation of some network protocols. With an IP-only
  1549. configuration it is safe to say N, otherwise say Y.
  1550. config UACCESS_WITH_MEMCPY
  1551. bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user()"
  1552. depends on MMU
  1553. default y if CPU_FEROCEON
  1554. help
  1555. Implement faster copy_to_user and clear_user methods for CPU
  1556. cores where a 8-word STM instruction give significantly higher
  1557. memory write throughput than a sequence of individual 32bit stores.
  1558. A possible side effect is a slight increase in scheduling latency
  1559. between threads sharing the same address space if they invoke
  1560. such copy operations with large buffers.
  1561. However, if the CPU data cache is using a write-allocate mode,
  1562. this option is unlikely to provide any performance gain.
  1563. config SECCOMP
  1564. bool
  1565. prompt "Enable seccomp to safely compute untrusted bytecode"
  1566. ---help---
  1567. This kernel feature is useful for number crunching applications
  1568. that may need to compute untrusted bytecode during their
  1569. execution. By using pipes or other transports made available to
  1570. the process as file descriptors supporting the read/write
  1571. syscalls, it's possible to isolate those applications in
  1572. their own address space using seccomp. Once seccomp is
  1573. enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
  1574. and the task is only allowed to execute a few safe syscalls
  1575. defined by each seccomp mode.
  1576. config CC_STACKPROTECTOR
  1577. bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
  1578. help
  1579. This option turns on the -fstack-protector GCC feature. This
  1580. feature puts, at the beginning of functions, a canary value on
  1581. the stack just before the return address, and validates
  1582. the value just before actually returning. Stack based buffer
  1583. overflows (that need to overwrite this return address) now also
  1584. overwrite the canary, which gets detected and the attack is then
  1585. neutralized via a kernel panic.
  1586. This feature requires gcc version 4.2 or above.
  1587. config XEN_DOM0
  1588. def_bool y
  1589. depends on XEN
  1590. config XEN
  1591. bool "Xen guest support on ARM (EXPERIMENTAL)"
  1592. depends on ARM && OF
  1593. depends on CPU_V7 && !CPU_V6
  1594. help
  1595. Say Y if you want to run Linux in a Virtual Machine on Xen on ARM.
  1596. endmenu
  1597. menu "Boot options"
  1598. config USE_OF
  1599. bool "Flattened Device Tree support"
  1600. select IRQ_DOMAIN
  1601. select OF
  1602. select OF_EARLY_FLATTREE
  1603. help
  1604. Include support for flattened device tree machine descriptions.
  1605. config ATAGS
  1606. bool "Support for the traditional ATAGS boot data passing" if USE_OF
  1607. default y
  1608. help
  1609. This is the traditional way of passing data to the kernel at boot
  1610. time. If you are solely relying on the flattened device tree (or
  1611. the ARM_ATAG_DTB_COMPAT option) then you may unselect this option
  1612. to remove ATAGS support from your kernel binary. If unsure,
  1613. leave this to y.
  1614. config DEPRECATED_PARAM_STRUCT
  1615. bool "Provide old way to pass kernel parameters"
  1616. depends on ATAGS
  1617. help
  1618. This was deprecated in 2001 and announced to live on for 5 years.
  1619. Some old boot loaders still use this way.
  1620. # Compressed boot loader in ROM. Yes, we really want to ask about
  1621. # TEXT and BSS so we preserve their values in the config files.
  1622. config ZBOOT_ROM_TEXT
  1623. hex "Compressed ROM boot loader base address"
  1624. default "0"
  1625. help
  1626. The physical address at which the ROM-able zImage is to be
  1627. placed in the target. Platforms which normally make use of
  1628. ROM-able zImage formats normally set this to a suitable
  1629. value in their defconfig file.
  1630. If ZBOOT_ROM is not enabled, this has no effect.
  1631. config ZBOOT_ROM_BSS
  1632. hex "Compressed ROM boot loader BSS address"
  1633. default "0"
  1634. help
  1635. The base address of an area of read/write memory in the target
  1636. for the ROM-able zImage which must be available while the
  1637. decompressor is running. It must be large enough to hold the
  1638. entire decompressed kernel plus an additional 128 KiB.
  1639. Platforms which normally make use of ROM-able zImage formats
  1640. normally set this to a suitable value in their defconfig file.
  1641. If ZBOOT_ROM is not enabled, this has no effect.
  1642. config ZBOOT_ROM
  1643. bool "Compressed boot loader in ROM/flash"
  1644. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  1645. help
  1646. Say Y here if you intend to execute your compressed kernel image
  1647. (zImage) directly from ROM or flash. If unsure, say N.
  1648. choice
  1649. prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)"
  1650. depends on ZBOOT_ROM && ARCH_SH7372
  1651. default ZBOOT_ROM_NONE
  1652. help
  1653. Include experimental SD/MMC loading code in the ROM-able zImage.
  1654. With this enabled it is possible to write the ROM-able zImage
  1655. kernel image to an MMC or SD card and boot the kernel straight
  1656. from the reset vector. At reset the processor Mask ROM will load
  1657. the first part of the ROM-able zImage which in turn loads the
  1658. rest the kernel image to RAM.
  1659. config ZBOOT_ROM_NONE
  1660. bool "No SD/MMC loader in zImage (EXPERIMENTAL)"
  1661. help
  1662. Do not load image from SD or MMC
  1663. config ZBOOT_ROM_MMCIF
  1664. bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
  1665. help
  1666. Load image from MMCIF hardware block.
  1667. config ZBOOT_ROM_SH_MOBILE_SDHI
  1668. bool "Include SuperH Mobile SDHI loader in zImage (EXPERIMENTAL)"
  1669. help
  1670. Load image from SDHI hardware block
  1671. endchoice
  1672. config ARM_APPENDED_DTB
  1673. bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
  1674. depends on OF && !ZBOOT_ROM
  1675. help
  1676. With this option, the boot code will look for a device tree binary
  1677. (DTB) appended to zImage
  1678. (e.g. cat zImage <filename>.dtb > zImage_w_dtb).
  1679. This is meant as a backward compatibility convenience for those
  1680. systems with a bootloader that can't be upgraded to accommodate
  1681. the documented boot protocol using a device tree.
  1682. Beware that there is very little in terms of protection against
  1683. this option being confused by leftover garbage in memory that might
  1684. look like a DTB header after a reboot if no actual DTB is appended
  1685. to zImage. Do not leave this option active in a production kernel
  1686. if you don't intend to always append a DTB. Proper passing of the
  1687. location into r2 of a bootloader provided DTB is always preferable
  1688. to this option.
  1689. config ARM_ATAG_DTB_COMPAT
  1690. bool "Supplement the appended DTB with traditional ATAG information"
  1691. depends on ARM_APPENDED_DTB
  1692. help
  1693. Some old bootloaders can't be updated to a DTB capable one, yet
  1694. they provide ATAGs with memory configuration, the ramdisk address,
  1695. the kernel cmdline string, etc. Such information is dynamically
  1696. provided by the bootloader and can't always be stored in a static
  1697. DTB. To allow a device tree enabled kernel to be used with such
  1698. bootloaders, this option allows zImage to extract the information
  1699. from the ATAG list and store it at run time into the appended DTB.
  1700. choice
  1701. prompt "Kernel command line type" if ARM_ATAG_DTB_COMPAT
  1702. default ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
  1703. config ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
  1704. bool "Use bootloader kernel arguments if available"
  1705. help
  1706. Uses the command-line options passed by the boot loader instead of
  1707. the device tree bootargs property. If the boot loader doesn't provide
  1708. any, the device tree bootargs property will be used.
  1709. config ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEND
  1710. bool "Extend with bootloader kernel arguments"
  1711. help
  1712. The command-line arguments provided by the boot loader will be
  1713. appended to the the device tree bootargs property.
  1714. endchoice
  1715. config CMDLINE
  1716. string "Default kernel command string"
  1717. default ""
  1718. help
  1719. On some architectures (EBSA110 and CATS), there is currently no way
  1720. for the boot loader to pass arguments to the kernel. For these
  1721. architectures, you should supply some command-line options at build
  1722. time by entering them here. As a minimum, you should specify the
  1723. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  1724. choice
  1725. prompt "Kernel command line type" if CMDLINE != ""
  1726. default CMDLINE_FROM_BOOTLOADER
  1727. depends on ATAGS
  1728. config CMDLINE_FROM_BOOTLOADER
  1729. bool "Use bootloader kernel arguments if available"
  1730. help
  1731. Uses the command-line options passed by the boot loader. If
  1732. the boot loader doesn't provide any, the default kernel command
  1733. string provided in CMDLINE will be used.
  1734. config CMDLINE_EXTEND
  1735. bool "Extend bootloader kernel arguments"
  1736. help
  1737. The command-line arguments provided by the boot loader will be
  1738. appended to the default kernel command string.
  1739. config CMDLINE_FORCE
  1740. bool "Always use the default kernel command string"
  1741. help
  1742. Always use the default kernel command string, even if the boot
  1743. loader passes other arguments to the kernel.
  1744. This is useful if you cannot or don't want to change the
  1745. command-line options your boot loader passes to the kernel.
  1746. endchoice
  1747. config XIP_KERNEL
  1748. bool "Kernel Execute-In-Place from ROM"
  1749. depends on !ZBOOT_ROM && !ARM_LPAE && !ARCH_MULTIPLATFORM
  1750. help
  1751. Execute-In-Place allows the kernel to run from non-volatile storage
  1752. directly addressable by the CPU, such as NOR flash. This saves RAM
  1753. space since the text section of the kernel is not loaded from flash
  1754. to RAM. Read-write sections, such as the data section and stack,
  1755. are still copied to RAM. The XIP kernel is not compressed since
  1756. it has to run directly from flash, so it will take more space to
  1757. store it. The flash address used to link the kernel object files,
  1758. and for storing it, is configuration dependent. Therefore, if you
  1759. say Y here, you must know the proper physical address where to
  1760. store the kernel image depending on your own flash memory usage.
  1761. Also note that the make target becomes "make xipImage" rather than
  1762. "make zImage" or "make Image". The final kernel binary to put in
  1763. ROM memory will be arch/arm/boot/xipImage.
  1764. If unsure, say N.
  1765. config XIP_PHYS_ADDR
  1766. hex "XIP Kernel Physical Location"
  1767. depends on XIP_KERNEL
  1768. default "0x00080000"
  1769. help
  1770. This is the physical address in your flash memory the kernel will
  1771. be linked for and stored to. This address is dependent on your
  1772. own flash usage.
  1773. config KEXEC
  1774. bool "Kexec system call (EXPERIMENTAL)"
  1775. depends on (!SMP || HOTPLUG_CPU)
  1776. help
  1777. kexec is a system call that implements the ability to shutdown your
  1778. current kernel, and to start another kernel. It is like a reboot
  1779. but it is independent of the system firmware. And like a reboot
  1780. you can start any kernel with it, not just Linux.
  1781. It is an ongoing process to be certain the hardware in a machine
  1782. is properly shutdown, so do not be surprised if this code does not
  1783. initially work for you. It may help to enable device hotplugging
  1784. support.
  1785. config ATAGS_PROC
  1786. bool "Export atags in procfs"
  1787. depends on ATAGS && KEXEC
  1788. default y
  1789. help
  1790. Should the atags used to boot the kernel be exported in an "atags"
  1791. file in procfs. Useful with kexec.
  1792. config CRASH_DUMP
  1793. bool "Build kdump crash kernel (EXPERIMENTAL)"
  1794. help
  1795. Generate crash dump after being started by kexec. This should
  1796. be normally only set in special crash dump kernels which are
  1797. loaded in the main kernel with kexec-tools into a specially
  1798. reserved region and then later executed after a crash by
  1799. kdump/kexec. The crash dump kernel must be compiled to a
  1800. memory address not used by the main kernel
  1801. For more details see Documentation/kdump/kdump.txt
  1802. config AUTO_ZRELADDR
  1803. bool "Auto calculation of the decompressed kernel image address"
  1804. depends on !ZBOOT_ROM && !ARCH_U300
  1805. help
  1806. ZRELADDR is the physical address where the decompressed kernel
  1807. image will be placed. If AUTO_ZRELADDR is selected, the address
  1808. will be determined at run-time by masking the current IP with
  1809. 0xf8000000. This assumes the zImage being placed in the first 128MB
  1810. from start of memory.
  1811. endmenu
  1812. menu "CPU Power Management"
  1813. if ARCH_HAS_CPUFREQ
  1814. source "drivers/cpufreq/Kconfig"
  1815. config CPU_FREQ_IMX
  1816. tristate "CPUfreq driver for i.MX CPUs"
  1817. depends on ARCH_MXC && CPU_FREQ
  1818. select CPU_FREQ_TABLE
  1819. help
  1820. This enables the CPUfreq driver for i.MX CPUs.
  1821. config CPU_FREQ_SA1100
  1822. bool
  1823. config CPU_FREQ_SA1110
  1824. bool
  1825. config CPU_FREQ_INTEGRATOR
  1826. tristate "CPUfreq driver for ARM Integrator CPUs"
  1827. depends on ARCH_INTEGRATOR && CPU_FREQ
  1828. default y
  1829. help
  1830. This enables the CPUfreq driver for ARM Integrator CPUs.
  1831. For details, take a look at <file:Documentation/cpu-freq>.
  1832. If in doubt, say Y.
  1833. config CPU_FREQ_PXA
  1834. bool
  1835. depends on CPU_FREQ && ARCH_PXA && PXA25x
  1836. default y
  1837. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  1838. select CPU_FREQ_TABLE
  1839. config CPU_FREQ_S3C
  1840. bool
  1841. help
  1842. Internal configuration node for common cpufreq on Samsung SoC
  1843. config CPU_FREQ_S3C24XX
  1844. bool "CPUfreq driver for Samsung S3C24XX series CPUs (EXPERIMENTAL)"
  1845. depends on ARCH_S3C24XX && CPU_FREQ
  1846. select CPU_FREQ_S3C
  1847. help
  1848. This enables the CPUfreq driver for the Samsung S3C24XX family
  1849. of CPUs.
  1850. For details, take a look at <file:Documentation/cpu-freq>.
  1851. If in doubt, say N.
  1852. config CPU_FREQ_S3C24XX_PLL
  1853. bool "Support CPUfreq changing of PLL frequency (EXPERIMENTAL)"
  1854. depends on CPU_FREQ_S3C24XX
  1855. help
  1856. Compile in support for changing the PLL frequency from the
  1857. S3C24XX series CPUfreq driver. The PLL takes time to settle
  1858. after a frequency change, so by default it is not enabled.
  1859. This also means that the PLL tables for the selected CPU(s) will
  1860. be built which may increase the size of the kernel image.
  1861. config CPU_FREQ_S3C24XX_DEBUG
  1862. bool "Debug CPUfreq Samsung driver core"
  1863. depends on CPU_FREQ_S3C24XX
  1864. help
  1865. Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
  1866. config CPU_FREQ_S3C24XX_IODEBUG
  1867. bool "Debug CPUfreq Samsung driver IO timing"
  1868. depends on CPU_FREQ_S3C24XX
  1869. help
  1870. Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
  1871. config CPU_FREQ_S3C24XX_DEBUGFS
  1872. bool "Export debugfs for CPUFreq"
  1873. depends on CPU_FREQ_S3C24XX && DEBUG_FS
  1874. help
  1875. Export status information via debugfs.
  1876. endif
  1877. source "drivers/cpuidle/Kconfig"
  1878. endmenu
  1879. menu "Floating point emulation"
  1880. comment "At least one emulation must be selected"
  1881. config FPE_NWFPE
  1882. bool "NWFPE math emulation"
  1883. depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
  1884. ---help---
  1885. Say Y to include the NWFPE floating point emulator in the kernel.
  1886. This is necessary to run most binaries. Linux does not currently
  1887. support floating point hardware so you need to say Y here even if
  1888. your machine has an FPA or floating point co-processor podule.
  1889. You may say N here if you are going to load the Acorn FPEmulator
  1890. early in the bootup.
  1891. config FPE_NWFPE_XP
  1892. bool "Support extended precision"
  1893. depends on FPE_NWFPE
  1894. help
  1895. Say Y to include 80-bit support in the kernel floating-point
  1896. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  1897. Note that gcc does not generate 80-bit operations by default,
  1898. so in most cases this option only enlarges the size of the
  1899. floating point emulator without any good reason.
  1900. You almost surely want to say N here.
  1901. config FPE_FASTFPE
  1902. bool "FastFPE math emulation (EXPERIMENTAL)"
  1903. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3
  1904. ---help---
  1905. Say Y here to include the FAST floating point emulator in the kernel.
  1906. This is an experimental much faster emulator which now also has full
  1907. precision for the mantissa. It does not support any exceptions.
  1908. It is very simple, and approximately 3-6 times faster than NWFPE.
  1909. It should be sufficient for most programs. It may be not suitable
  1910. for scientific calculations, but you have to check this for yourself.
  1911. If you do not feel you need a faster FP emulation you should better
  1912. choose NWFPE.
  1913. config VFP
  1914. bool "VFP-format floating point maths"
  1915. depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  1916. help
  1917. Say Y to include VFP support code in the kernel. This is needed
  1918. if your hardware includes a VFP unit.
  1919. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  1920. release notes and additional status information.
  1921. Say N if your target does not have VFP hardware.
  1922. config VFPv3
  1923. bool
  1924. depends on VFP
  1925. default y if CPU_V7
  1926. config NEON
  1927. bool "Advanced SIMD (NEON) Extension support"
  1928. depends on VFPv3 && CPU_V7
  1929. help
  1930. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  1931. Extension.
  1932. endmenu
  1933. menu "Userspace binary formats"
  1934. source "fs/Kconfig.binfmt"
  1935. config ARTHUR
  1936. tristate "RISC OS personality"
  1937. depends on !AEABI
  1938. help
  1939. Say Y here to include the kernel code necessary if you want to run
  1940. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  1941. experimental; if this sounds frightening, say N and sleep in peace.
  1942. You can also say M here to compile this support as a module (which
  1943. will be called arthur).
  1944. endmenu
  1945. menu "Power management options"
  1946. source "kernel/power/Kconfig"
  1947. config ARCH_SUSPEND_POSSIBLE
  1948. depends on !ARCH_S5PC100
  1949. depends on CPU_ARM920T || CPU_ARM926T || CPU_SA1100 || \
  1950. CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE || CPU_MOHAWK
  1951. def_bool y
  1952. config ARM_CPU_SUSPEND
  1953. def_bool PM_SLEEP
  1954. endmenu
  1955. source "net/Kconfig"
  1956. source "drivers/Kconfig"
  1957. source "fs/Kconfig"
  1958. source "arch/arm/Kconfig.debug"
  1959. source "security/Kconfig"
  1960. source "crypto/Kconfig"
  1961. source "lib/Kconfig"
  1962. source "arch/arm/kvm/Kconfig"