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_WANT_IPC_PARSE_VERSION
  8. select BUILDTIME_EXTABLE_SORT if MMU
  9. select CPU_PM if (SUSPEND || CPU_IDLE)
  10. select DCACHE_WORD_ACCESS if (CPU_V6 || CPU_V6K || CPU_V7) && !CPU_BIG_ENDIAN && MMU
  11. select GENERIC_ATOMIC64 if (CPU_V6 || !CPU_32v6K || !AEABI)
  12. select GENERIC_CLOCKEVENTS_BROADCAST if SMP
  13. select GENERIC_IRQ_PROBE
  14. select GENERIC_IRQ_SHOW
  15. select GENERIC_PCI_IOMAP
  16. select GENERIC_SMP_IDLE_THREAD
  17. select GENERIC_STRNCPY_FROM_USER
  18. select GENERIC_STRNLEN_USER
  19. select HARDIRQS_SW_RESEND
  20. select HAVE_AOUT
  21. select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL
  22. select HAVE_ARCH_KGDB
  23. select HAVE_ARCH_SECCOMP_FILTER
  24. select HAVE_ARCH_TRACEHOOK
  25. select HAVE_BPF_JIT
  26. select HAVE_C_RECORDMCOUNT
  27. select HAVE_DEBUG_KMEMLEAK
  28. select HAVE_DMA_API_DEBUG
  29. select HAVE_DMA_ATTRS
  30. select HAVE_DMA_CONTIGUOUS if MMU
  31. select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL)
  32. select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
  33. select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL)
  34. select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
  35. select HAVE_GENERIC_DMA_COHERENT
  36. select HAVE_GENERIC_HARDIRQS
  37. select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7))
  38. select HAVE_IDE if PCI || ISA || PCMCIA
  39. select HAVE_KERNEL_GZIP
  40. select HAVE_KERNEL_LZMA
  41. select HAVE_KERNEL_LZO
  42. select HAVE_KERNEL_XZ
  43. select HAVE_KPROBES if !XIP_KERNEL
  44. select HAVE_KRETPROBES if (HAVE_KPROBES)
  45. select HAVE_MEMBLOCK
  46. select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
  47. select HAVE_PERF_EVENTS
  48. select HAVE_REGS_AND_STACK_ACCESS_API
  49. select HAVE_SYSCALL_TRACEPOINTS
  50. select HAVE_UID16
  51. select KTIME_SCALAR
  52. select PERF_USE_VMALLOC
  53. select RTC_LIB
  54. select SYS_SUPPORTS_APM_EMULATION
  55. select HAVE_MOD_ARCH_SPECIFIC if ARM_UNWIND
  56. select MODULES_USE_ELF_REL
  57. select CLONE_BACKWARDS
  58. help
  59. The ARM series is a line of low-power-consumption RISC chip designs
  60. licensed by ARM Ltd and targeted at embedded applications and
  61. handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
  62. manufactured, but legacy ARM-based PC hardware remains popular in
  63. Europe. There is an ARM Linux project with a web page at
  64. <http://www.arm.linux.org.uk/>.
  65. config ARM_HAS_SG_CHAIN
  66. bool
  67. config NEED_SG_DMA_LENGTH
  68. bool
  69. config ARM_DMA_USE_IOMMU
  70. bool
  71. select ARM_HAS_SG_CHAIN
  72. select NEED_SG_DMA_LENGTH
  73. config HAVE_PWM
  74. bool
  75. config MIGHT_HAVE_PCI
  76. bool
  77. config SYS_SUPPORTS_APM_EMULATION
  78. bool
  79. config GENERIC_GPIO
  80. bool
  81. config HAVE_TCM
  82. bool
  83. select GENERIC_ALLOCATOR
  84. config HAVE_PROC_CPU
  85. bool
  86. config NO_IOPORT
  87. bool
  88. config EISA
  89. bool
  90. ---help---
  91. The Extended Industry Standard Architecture (EISA) bus was
  92. developed as an open alternative to the IBM MicroChannel bus.
  93. The EISA bus provided some of the features of the IBM MicroChannel
  94. bus while maintaining backward compatibility with cards made for
  95. the older ISA bus. The EISA bus saw limited use between 1988 and
  96. 1995 when it was made obsolete by the PCI bus.
  97. Say Y here if you are building a kernel for an EISA-based machine.
  98. Otherwise, say N.
  99. config SBUS
  100. bool
  101. config STACKTRACE_SUPPORT
  102. bool
  103. default y
  104. config HAVE_LATENCYTOP_SUPPORT
  105. bool
  106. depends on !SMP
  107. default y
  108. config LOCKDEP_SUPPORT
  109. bool
  110. default y
  111. config TRACE_IRQFLAGS_SUPPORT
  112. bool
  113. default y
  114. config RWSEM_GENERIC_SPINLOCK
  115. bool
  116. default y
  117. config RWSEM_XCHGADD_ALGORITHM
  118. bool
  119. config ARCH_HAS_ILOG2_U32
  120. bool
  121. config ARCH_HAS_ILOG2_U64
  122. bool
  123. config ARCH_HAS_CPUFREQ
  124. bool
  125. help
  126. Internal node to signify that the ARCH has CPUFREQ support
  127. and that the relevant menu configurations are displayed for
  128. it.
  129. config GENERIC_HWEIGHT
  130. bool
  131. default y
  132. config GENERIC_CALIBRATE_DELAY
  133. bool
  134. default y
  135. config ARCH_MAY_HAVE_PC_FDC
  136. bool
  137. config ZONE_DMA
  138. bool
  139. config NEED_DMA_MAP_STATE
  140. def_bool y
  141. config ARCH_HAS_DMA_SET_COHERENT_MASK
  142. bool
  143. config GENERIC_ISA_DMA
  144. bool
  145. config FIQ
  146. bool
  147. config NEED_RET_TO_USER
  148. bool
  149. config ARCH_MTD_XIP
  150. bool
  151. config VECTORS_BASE
  152. hex
  153. default 0xffff0000 if MMU || CPU_HIGH_VECTOR
  154. default DRAM_BASE if REMAP_VECTORS_TO_RAM
  155. default 0x00000000
  156. help
  157. The base address of exception vectors.
  158. config ARM_PATCH_PHYS_VIRT
  159. bool "Patch physical to virtual translations at runtime" if EMBEDDED
  160. default y
  161. depends on !XIP_KERNEL && MMU
  162. depends on !ARCH_REALVIEW || !SPARSEMEM
  163. help
  164. Patch phys-to-virt and virt-to-phys translation functions at
  165. boot and module load time according to the position of the
  166. kernel in system memory.
  167. This can only be used with non-XIP MMU kernels where the base
  168. of physical memory is at a 16MB boundary.
  169. Only disable this option if you know that you do not require
  170. this feature (eg, building a kernel for a single machine) and
  171. you need to shrink the kernel to the minimal size.
  172. config NEED_MACH_GPIO_H
  173. bool
  174. help
  175. Select this when mach/gpio.h is required to provide special
  176. definitions for this platform. The need for mach/gpio.h should
  177. be avoided when possible.
  178. config NEED_MACH_IO_H
  179. bool
  180. help
  181. Select this when mach/io.h is required to provide special
  182. definitions for this platform. The need for mach/io.h should
  183. be avoided when possible.
  184. config NEED_MACH_MEMORY_H
  185. bool
  186. help
  187. Select this when mach/memory.h is required to provide special
  188. definitions for this platform. The need for mach/memory.h should
  189. be avoided when possible.
  190. config PHYS_OFFSET
  191. hex "Physical address of main memory" if MMU
  192. depends on !ARM_PATCH_PHYS_VIRT && !NEED_MACH_MEMORY_H
  193. default DRAM_BASE if !MMU
  194. help
  195. Please provide the physical address corresponding to the
  196. location of main memory in your system.
  197. config GENERIC_BUG
  198. def_bool y
  199. depends on BUG
  200. source "init/Kconfig"
  201. source "kernel/Kconfig.freezer"
  202. menu "System Type"
  203. config MMU
  204. bool "MMU-based Paged Memory Management Support"
  205. default y
  206. help
  207. Select if you want MMU-based virtualised addressing space
  208. support by paged memory management. If unsure, say 'Y'.
  209. #
  210. # The "ARM system type" choice list is ordered alphabetically by option
  211. # text. Please add new entries in the option alphabetic order.
  212. #
  213. choice
  214. prompt "ARM system type"
  215. default ARCH_VERSATILE if !MMU
  216. default ARCH_MULTIPLATFORM if MMU
  217. config ARCH_MULTIPLATFORM
  218. bool "Allow multiple platforms to be selected"
  219. depends on MMU
  220. select ARM_PATCH_PHYS_VIRT
  221. select AUTO_ZRELADDR
  222. select COMMON_CLK
  223. select MULTI_IRQ_HANDLER
  224. select SPARSE_IRQ
  225. select USE_OF
  226. config ARCH_INTEGRATOR
  227. bool "ARM Ltd. Integrator family"
  228. select ARCH_HAS_CPUFREQ
  229. select ARM_AMBA
  230. select COMMON_CLK
  231. select COMMON_CLK_VERSATILE
  232. select GENERIC_CLOCKEVENTS
  233. select HAVE_TCM
  234. select ICST
  235. select MULTI_IRQ_HANDLER
  236. select NEED_MACH_MEMORY_H
  237. select PLAT_VERSATILE
  238. select SPARSE_IRQ
  239. select VERSATILE_FPGA_IRQ
  240. help
  241. Support for ARM's Integrator platform.
  242. config ARCH_REALVIEW
  243. bool "ARM Ltd. RealView family"
  244. select ARCH_WANT_OPTIONAL_GPIOLIB
  245. select ARM_AMBA
  246. select ARM_TIMER_SP804
  247. select COMMON_CLK
  248. select COMMON_CLK_VERSATILE
  249. select GENERIC_CLOCKEVENTS
  250. select GPIO_PL061 if GPIOLIB
  251. select ICST
  252. select NEED_MACH_MEMORY_H
  253. select PLAT_VERSATILE
  254. select PLAT_VERSATILE_CLCD
  255. help
  256. This enables support for ARM Ltd RealView boards.
  257. config ARCH_VERSATILE
  258. bool "ARM Ltd. Versatile family"
  259. select ARCH_WANT_OPTIONAL_GPIOLIB
  260. select ARM_AMBA
  261. select ARM_TIMER_SP804
  262. select ARM_VIC
  263. select CLKDEV_LOOKUP
  264. select GENERIC_CLOCKEVENTS
  265. select HAVE_MACH_CLKDEV
  266. select ICST
  267. select PLAT_VERSATILE
  268. select PLAT_VERSATILE_CLCD
  269. select PLAT_VERSATILE_CLOCK
  270. select VERSATILE_FPGA_IRQ
  271. help
  272. This enables support for ARM Ltd Versatile board.
  273. config ARCH_AT91
  274. bool "Atmel AT91"
  275. select ARCH_REQUIRE_GPIOLIB
  276. select CLKDEV_LOOKUP
  277. select HAVE_CLK
  278. select IRQ_DOMAIN
  279. select NEED_MACH_GPIO_H
  280. select NEED_MACH_IO_H if PCCARD
  281. select PINCTRL
  282. select PINCTRL_AT91 if USE_OF
  283. help
  284. This enables support for systems based on Atmel
  285. AT91RM9200 and AT91SAM9* processors.
  286. config ARCH_BCM2835
  287. bool "Broadcom BCM2835 family"
  288. select ARCH_REQUIRE_GPIOLIB
  289. select ARM_AMBA
  290. select ARM_ERRATA_411920
  291. select ARM_TIMER_SP804
  292. select CLKDEV_LOOKUP
  293. select CLKSRC_OF
  294. select COMMON_CLK
  295. select CPU_V6
  296. select GENERIC_CLOCKEVENTS
  297. select MULTI_IRQ_HANDLER
  298. select PINCTRL
  299. select PINCTRL_BCM2835
  300. select SPARSE_IRQ
  301. select USE_OF
  302. help
  303. This enables support for the Broadcom BCM2835 SoC. This SoC is
  304. use in the Raspberry Pi, and Roku 2 devices.
  305. config ARCH_CNS3XXX
  306. bool "Cavium Networks CNS3XXX family"
  307. select ARM_GIC
  308. select CPU_V6K
  309. select GENERIC_CLOCKEVENTS
  310. select MIGHT_HAVE_CACHE_L2X0
  311. select MIGHT_HAVE_PCI
  312. select PCI_DOMAINS if PCI
  313. help
  314. Support for Cavium Networks CNS3XXX platform.
  315. config ARCH_CLPS711X
  316. bool "Cirrus Logic CLPS711x/EP721x/EP731x-based"
  317. select ARCH_REQUIRE_GPIOLIB
  318. select AUTO_ZRELADDR
  319. select CLKDEV_LOOKUP
  320. select COMMON_CLK
  321. select CPU_ARM720T
  322. select GENERIC_CLOCKEVENTS
  323. select MULTI_IRQ_HANDLER
  324. select NEED_MACH_MEMORY_H
  325. select SPARSE_IRQ
  326. help
  327. Support for Cirrus Logic 711x/721x/731x based boards.
  328. config ARCH_GEMINI
  329. bool "Cortina Systems Gemini"
  330. select ARCH_REQUIRE_GPIOLIB
  331. select ARCH_USES_GETTIMEOFFSET
  332. select CPU_FA526
  333. help
  334. Support for the Cortina Systems Gemini family SoCs
  335. config ARCH_SIRF
  336. bool "CSR SiRF"
  337. select ARCH_REQUIRE_GPIOLIB
  338. select AUTO_ZRELADDR
  339. select COMMON_CLK
  340. select GENERIC_CLOCKEVENTS
  341. select GENERIC_IRQ_CHIP
  342. select MIGHT_HAVE_CACHE_L2X0
  343. select NO_IOPORT
  344. select PINCTRL
  345. select PINCTRL_SIRF
  346. select USE_OF
  347. help
  348. Support for CSR SiRFprimaII/Marco/Polo platforms
  349. config ARCH_EBSA110
  350. bool "EBSA-110"
  351. select ARCH_USES_GETTIMEOFFSET
  352. select CPU_SA110
  353. select ISA
  354. select NEED_MACH_IO_H
  355. select NEED_MACH_MEMORY_H
  356. select NO_IOPORT
  357. help
  358. This is an evaluation board for the StrongARM processor available
  359. from Digital. It has limited hardware on-board, including an
  360. Ethernet interface, two PCMCIA sockets, two serial ports and a
  361. parallel port.
  362. config ARCH_EP93XX
  363. bool "EP93xx-based"
  364. select ARCH_HAS_HOLES_MEMORYMODEL
  365. select ARCH_REQUIRE_GPIOLIB
  366. select ARCH_USES_GETTIMEOFFSET
  367. select ARM_AMBA
  368. select ARM_VIC
  369. select CLKDEV_LOOKUP
  370. select CPU_ARM920T
  371. select NEED_MACH_MEMORY_H
  372. help
  373. This enables support for the Cirrus EP93xx series of CPUs.
  374. config ARCH_FOOTBRIDGE
  375. bool "FootBridge"
  376. select CPU_SA110
  377. select FOOTBRIDGE
  378. select GENERIC_CLOCKEVENTS
  379. select HAVE_IDE
  380. select NEED_MACH_IO_H if !MMU
  381. select NEED_MACH_MEMORY_H
  382. help
  383. Support for systems based on the DC21285 companion chip
  384. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  385. config ARCH_MXS
  386. bool "Freescale MXS-based"
  387. select ARCH_REQUIRE_GPIOLIB
  388. select CLKDEV_LOOKUP
  389. select CLKSRC_MMIO
  390. select COMMON_CLK
  391. select GENERIC_CLOCKEVENTS
  392. select HAVE_CLK_PREPARE
  393. select MULTI_IRQ_HANDLER
  394. select PINCTRL
  395. select SPARSE_IRQ
  396. select USE_OF
  397. help
  398. Support for Freescale MXS-based family of processors
  399. config ARCH_NETX
  400. bool "Hilscher NetX based"
  401. select ARM_VIC
  402. select CLKSRC_MMIO
  403. select CPU_ARM926T
  404. select GENERIC_CLOCKEVENTS
  405. help
  406. This enables support for systems based on the Hilscher NetX Soc
  407. config ARCH_H720X
  408. bool "Hynix HMS720x-based"
  409. select ARCH_USES_GETTIMEOFFSET
  410. select CPU_ARM720T
  411. select ISA_DMA_API
  412. help
  413. This enables support for systems based on the Hynix HMS720x
  414. config ARCH_IOP13XX
  415. bool "IOP13xx-based"
  416. depends on MMU
  417. select ARCH_SUPPORTS_MSI
  418. select CPU_XSC3
  419. select NEED_MACH_MEMORY_H
  420. select NEED_RET_TO_USER
  421. select PCI
  422. select PLAT_IOP
  423. select VMSPLIT_1G
  424. help
  425. Support for Intel's IOP13XX (XScale) family of processors.
  426. config ARCH_IOP32X
  427. bool "IOP32x-based"
  428. depends on MMU
  429. select ARCH_REQUIRE_GPIOLIB
  430. select CPU_XSCALE
  431. select NEED_MACH_GPIO_H
  432. select NEED_RET_TO_USER
  433. select PCI
  434. select PLAT_IOP
  435. help
  436. Support for Intel's 80219 and IOP32X (XScale) family of
  437. processors.
  438. config ARCH_IOP33X
  439. bool "IOP33x-based"
  440. depends on MMU
  441. select ARCH_REQUIRE_GPIOLIB
  442. select CPU_XSCALE
  443. select NEED_MACH_GPIO_H
  444. select NEED_RET_TO_USER
  445. select PCI
  446. select PLAT_IOP
  447. help
  448. Support for Intel's IOP33X (XScale) family of processors.
  449. config ARCH_IXP4XX
  450. bool "IXP4xx-based"
  451. depends on MMU
  452. select ARCH_HAS_DMA_SET_COHERENT_MASK
  453. select ARCH_REQUIRE_GPIOLIB
  454. select CLKSRC_MMIO
  455. select CPU_XSCALE
  456. select DMABOUNCE if PCI
  457. select GENERIC_CLOCKEVENTS
  458. select MIGHT_HAVE_PCI
  459. select NEED_MACH_IO_H
  460. help
  461. Support for Intel's IXP4XX (XScale) family of processors.
  462. config ARCH_DOVE
  463. bool "Marvell Dove"
  464. select ARCH_REQUIRE_GPIOLIB
  465. select COMMON_CLK_DOVE
  466. select CPU_V7
  467. select GENERIC_CLOCKEVENTS
  468. select MIGHT_HAVE_PCI
  469. select PINCTRL
  470. select PINCTRL_DOVE
  471. select PLAT_ORION_LEGACY
  472. select USB_ARCH_HAS_EHCI
  473. help
  474. Support for the Marvell Dove SoC 88AP510
  475. config ARCH_KIRKWOOD
  476. bool "Marvell Kirkwood"
  477. select ARCH_REQUIRE_GPIOLIB
  478. select CPU_FEROCEON
  479. select GENERIC_CLOCKEVENTS
  480. select PCI
  481. select PCI_QUIRKS
  482. select PINCTRL
  483. select PINCTRL_KIRKWOOD
  484. select PLAT_ORION_LEGACY
  485. help
  486. Support for the following Marvell Kirkwood series SoCs:
  487. 88F6180, 88F6192 and 88F6281.
  488. config ARCH_MV78XX0
  489. bool "Marvell MV78xx0"
  490. select ARCH_REQUIRE_GPIOLIB
  491. select CPU_FEROCEON
  492. select GENERIC_CLOCKEVENTS
  493. select PCI
  494. select PLAT_ORION_LEGACY
  495. help
  496. Support for the following Marvell MV78xx0 series SoCs:
  497. MV781x0, MV782x0.
  498. config ARCH_ORION5X
  499. bool "Marvell Orion"
  500. depends on MMU
  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 Orion 5x series SoCs:
  508. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  509. Orion-2 (5281), Orion-1-90 (6183).
  510. config ARCH_MMP
  511. bool "Marvell PXA168/910/MMP2"
  512. depends on MMU
  513. select ARCH_REQUIRE_GPIOLIB
  514. select CLKDEV_LOOKUP
  515. select GENERIC_ALLOCATOR
  516. select GENERIC_CLOCKEVENTS
  517. select GPIO_PXA
  518. select IRQ_DOMAIN
  519. select NEED_MACH_GPIO_H
  520. select PINCTRL
  521. select PLAT_PXA
  522. select SPARSE_IRQ
  523. help
  524. Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
  525. config ARCH_KS8695
  526. bool "Micrel/Kendin KS8695"
  527. select ARCH_REQUIRE_GPIOLIB
  528. select CLKSRC_MMIO
  529. select CPU_ARM922T
  530. select GENERIC_CLOCKEVENTS
  531. select NEED_MACH_MEMORY_H
  532. help
  533. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  534. System-on-Chip devices.
  535. config ARCH_W90X900
  536. bool "Nuvoton W90X900 CPU"
  537. select ARCH_REQUIRE_GPIOLIB
  538. select CLKDEV_LOOKUP
  539. select CLKSRC_MMIO
  540. select CPU_ARM926T
  541. select GENERIC_CLOCKEVENTS
  542. help
  543. Support for Nuvoton (Winbond logic dept.) ARM9 processor,
  544. At present, the w90x900 has been renamed nuc900, regarding
  545. the ARM series product line, you can login the following
  546. link address to know more.
  547. <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
  548. ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
  549. config ARCH_LPC32XX
  550. bool "NXP LPC32XX"
  551. select ARCH_REQUIRE_GPIOLIB
  552. select ARM_AMBA
  553. select CLKDEV_LOOKUP
  554. select CLKSRC_MMIO
  555. select CPU_ARM926T
  556. select GENERIC_CLOCKEVENTS
  557. select HAVE_IDE
  558. select HAVE_PWM
  559. select USB_ARCH_HAS_OHCI
  560. select USE_OF
  561. help
  562. Support for the NXP LPC32XX family of processors
  563. config ARCH_TEGRA
  564. bool "NVIDIA Tegra"
  565. select ARCH_HAS_CPUFREQ
  566. select ARCH_REQUIRE_GPIOLIB
  567. select CLKDEV_LOOKUP
  568. select CLKSRC_MMIO
  569. select CLKSRC_OF
  570. select COMMON_CLK
  571. select GENERIC_CLOCKEVENTS
  572. select HAVE_CLK
  573. select HAVE_SMP
  574. select MIGHT_HAVE_CACHE_L2X0
  575. select SPARSE_IRQ
  576. select USE_OF
  577. help
  578. This enables support for NVIDIA Tegra based systems (Tegra APX,
  579. Tegra 6xx and Tegra 2 series).
  580. config ARCH_PXA
  581. bool "PXA2xx/PXA3xx-based"
  582. depends on MMU
  583. select ARCH_HAS_CPUFREQ
  584. select ARCH_MTD_XIP
  585. select ARCH_REQUIRE_GPIOLIB
  586. select ARM_CPU_SUSPEND if PM
  587. select AUTO_ZRELADDR
  588. select CLKDEV_LOOKUP
  589. select CLKSRC_MMIO
  590. select GENERIC_CLOCKEVENTS
  591. select GPIO_PXA
  592. select HAVE_IDE
  593. select MULTI_IRQ_HANDLER
  594. select NEED_MACH_GPIO_H
  595. select PLAT_PXA
  596. select SPARSE_IRQ
  597. help
  598. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  599. config ARCH_MSM
  600. bool "Qualcomm MSM"
  601. select ARCH_REQUIRE_GPIOLIB
  602. select CLKDEV_LOOKUP
  603. select GENERIC_CLOCKEVENTS
  604. select HAVE_CLK
  605. help
  606. Support for Qualcomm MSM/QSD based systems. This runs on the
  607. apps processor of the MSM/QSD and depends on a shared memory
  608. interface to the modem processor which runs the baseband
  609. stack and controls some vital subsystems
  610. (clock and power control, etc).
  611. config ARCH_SHMOBILE
  612. bool "Renesas SH-Mobile / R-Mobile"
  613. select CLKDEV_LOOKUP
  614. select GENERIC_CLOCKEVENTS
  615. select HAVE_CLK
  616. select HAVE_MACH_CLKDEV
  617. select HAVE_SMP
  618. select MIGHT_HAVE_CACHE_L2X0
  619. select MULTI_IRQ_HANDLER
  620. select NEED_MACH_MEMORY_H
  621. select NO_IOPORT
  622. select PINCTRL
  623. select PM_GENERIC_DOMAINS if PM
  624. select SPARSE_IRQ
  625. help
  626. Support for Renesas's SH-Mobile and R-Mobile ARM platforms.
  627. config ARCH_RPC
  628. bool "RiscPC"
  629. select ARCH_ACORN
  630. select ARCH_MAY_HAVE_PC_FDC
  631. select ARCH_SPARSEMEM_ENABLE
  632. select ARCH_USES_GETTIMEOFFSET
  633. select FIQ
  634. select HAVE_IDE
  635. select HAVE_PATA_PLATFORM
  636. select ISA_DMA_API
  637. select NEED_MACH_IO_H
  638. select NEED_MACH_MEMORY_H
  639. select NO_IOPORT
  640. help
  641. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  642. CD-ROM interface, serial and parallel port, and the floppy drive.
  643. config ARCH_SA1100
  644. bool "SA1100-based"
  645. select ARCH_HAS_CPUFREQ
  646. select ARCH_MTD_XIP
  647. select ARCH_REQUIRE_GPIOLIB
  648. select ARCH_SPARSEMEM_ENABLE
  649. select CLKDEV_LOOKUP
  650. select CLKSRC_MMIO
  651. select CPU_FREQ
  652. select CPU_SA1100
  653. select GENERIC_CLOCKEVENTS
  654. select HAVE_IDE
  655. select ISA
  656. select NEED_MACH_GPIO_H
  657. select NEED_MACH_MEMORY_H
  658. select SPARSE_IRQ
  659. help
  660. Support for StrongARM 11x0 based boards.
  661. config ARCH_S3C24XX
  662. bool "Samsung S3C24XX SoCs"
  663. select ARCH_HAS_CPUFREQ
  664. select ARCH_USES_GETTIMEOFFSET
  665. select CLKDEV_LOOKUP
  666. select HAVE_CLK
  667. select HAVE_S3C2410_I2C if I2C
  668. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  669. select HAVE_S3C_RTC if RTC_CLASS
  670. select NEED_MACH_GPIO_H
  671. select NEED_MACH_IO_H
  672. help
  673. Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443
  674. and S3C2450 SoCs based systems, such as the Simtec Electronics BAST
  675. (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or the
  676. Samsung SMDK2410 development board (and derivatives).
  677. config ARCH_S3C64XX
  678. bool "Samsung S3C64XX"
  679. select ARCH_HAS_CPUFREQ
  680. select ARCH_REQUIRE_GPIOLIB
  681. select ARCH_USES_GETTIMEOFFSET
  682. select ARM_VIC
  683. select CLKDEV_LOOKUP
  684. select CPU_V6
  685. select HAVE_CLK
  686. select HAVE_S3C2410_I2C if I2C
  687. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  688. select HAVE_TCM
  689. select NEED_MACH_GPIO_H
  690. select NO_IOPORT
  691. select PLAT_SAMSUNG
  692. select S3C_DEV_NAND
  693. select S3C_GPIO_TRACK
  694. select SAMSUNG_CLKSRC
  695. select SAMSUNG_GPIOLIB_4BIT
  696. select SAMSUNG_IRQ_VIC_TIMER
  697. select USB_ARCH_HAS_OHCI
  698. help
  699. Samsung S3C64XX series based systems
  700. config ARCH_S5P64X0
  701. bool "Samsung S5P6440 S5P6450"
  702. select CLKDEV_LOOKUP
  703. select CLKSRC_MMIO
  704. select CPU_V6
  705. select GENERIC_CLOCKEVENTS
  706. select HAVE_CLK
  707. select HAVE_S3C2410_I2C if I2C
  708. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  709. select HAVE_S3C_RTC if RTC_CLASS
  710. select NEED_MACH_GPIO_H
  711. help
  712. Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
  713. SMDK6450.
  714. config ARCH_S5PC100
  715. bool "Samsung S5PC100"
  716. select ARCH_USES_GETTIMEOFFSET
  717. select CLKDEV_LOOKUP
  718. select CPU_V7
  719. select HAVE_CLK
  720. select HAVE_S3C2410_I2C if I2C
  721. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  722. select HAVE_S3C_RTC if RTC_CLASS
  723. select NEED_MACH_GPIO_H
  724. help
  725. Samsung S5PC100 series based systems
  726. config ARCH_S5PV210
  727. bool "Samsung S5PV210/S5PC110"
  728. select ARCH_HAS_CPUFREQ
  729. select ARCH_HAS_HOLES_MEMORYMODEL
  730. select ARCH_SPARSEMEM_ENABLE
  731. select CLKDEV_LOOKUP
  732. select CLKSRC_MMIO
  733. select CPU_V7
  734. select GENERIC_CLOCKEVENTS
  735. select HAVE_CLK
  736. select HAVE_S3C2410_I2C if I2C
  737. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  738. select HAVE_S3C_RTC if RTC_CLASS
  739. select NEED_MACH_GPIO_H
  740. select NEED_MACH_MEMORY_H
  741. help
  742. Samsung S5PV210/S5PC110 series based systems
  743. config ARCH_EXYNOS
  744. bool "Samsung EXYNOS"
  745. select ARCH_HAS_CPUFREQ
  746. select ARCH_HAS_HOLES_MEMORYMODEL
  747. select ARCH_SPARSEMEM_ENABLE
  748. select CLKDEV_LOOKUP
  749. select CPU_V7
  750. select GENERIC_CLOCKEVENTS
  751. select HAVE_CLK
  752. select HAVE_S3C2410_I2C if I2C
  753. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  754. select HAVE_S3C_RTC if RTC_CLASS
  755. select NEED_MACH_GPIO_H
  756. select NEED_MACH_MEMORY_H
  757. help
  758. Support for SAMSUNG's EXYNOS SoCs (EXYNOS4/5)
  759. config ARCH_SHARK
  760. bool "Shark"
  761. select ARCH_USES_GETTIMEOFFSET
  762. select CPU_SA110
  763. select ISA
  764. select ISA_DMA
  765. select NEED_MACH_MEMORY_H
  766. select PCI
  767. select ZONE_DMA
  768. help
  769. Support for the StrongARM based Digital DNARD machine, also known
  770. as "Shark" (<http://www.shark-linux.de/shark.html>).
  771. config ARCH_U300
  772. bool "ST-Ericsson U300 Series"
  773. depends on MMU
  774. select ARCH_REQUIRE_GPIOLIB
  775. select ARM_AMBA
  776. select ARM_PATCH_PHYS_VIRT
  777. select ARM_VIC
  778. select CLKDEV_LOOKUP
  779. select CLKSRC_MMIO
  780. select COMMON_CLK
  781. select CPU_ARM926T
  782. select GENERIC_CLOCKEVENTS
  783. select HAVE_TCM
  784. select SPARSE_IRQ
  785. help
  786. Support for ST-Ericsson U300 series mobile platforms.
  787. config ARCH_U8500
  788. bool "ST-Ericsson U8500 Series"
  789. depends on MMU
  790. select ARCH_HAS_CPUFREQ
  791. select ARCH_REQUIRE_GPIOLIB
  792. select ARM_AMBA
  793. select CLKDEV_LOOKUP
  794. select CPU_V7
  795. select GENERIC_CLOCKEVENTS
  796. select HAVE_SMP
  797. select MIGHT_HAVE_CACHE_L2X0
  798. select SPARSE_IRQ
  799. help
  800. Support for ST-Ericsson's Ux500 architecture
  801. config ARCH_NOMADIK
  802. bool "STMicroelectronics Nomadik"
  803. select ARCH_REQUIRE_GPIOLIB
  804. select ARM_AMBA
  805. select ARM_VIC
  806. select COMMON_CLK
  807. select CPU_ARM926T
  808. select GENERIC_CLOCKEVENTS
  809. select MIGHT_HAVE_CACHE_L2X0
  810. select PINCTRL
  811. select PINCTRL_STN8815
  812. select SPARSE_IRQ
  813. help
  814. Support for the Nomadik platform by ST-Ericsson
  815. config PLAT_SPEAR
  816. bool "ST SPEAr"
  817. select ARCH_HAS_CPUFREQ
  818. select ARCH_REQUIRE_GPIOLIB
  819. select ARM_AMBA
  820. select CLKDEV_LOOKUP
  821. select CLKSRC_MMIO
  822. select COMMON_CLK
  823. select GENERIC_CLOCKEVENTS
  824. select HAVE_CLK
  825. help
  826. Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
  827. config ARCH_DAVINCI
  828. bool "TI DaVinci"
  829. select ARCH_HAS_HOLES_MEMORYMODEL
  830. select ARCH_REQUIRE_GPIOLIB
  831. select CLKDEV_LOOKUP
  832. select GENERIC_ALLOCATOR
  833. select GENERIC_CLOCKEVENTS
  834. select GENERIC_IRQ_CHIP
  835. select HAVE_IDE
  836. select NEED_MACH_GPIO_H
  837. select USE_OF
  838. select ZONE_DMA
  839. help
  840. Support for TI's DaVinci platform.
  841. config ARCH_OMAP1
  842. bool "TI OMAP1"
  843. depends on MMU
  844. select ARCH_HAS_CPUFREQ
  845. select ARCH_HAS_HOLES_MEMORYMODEL
  846. select ARCH_OMAP
  847. select ARCH_REQUIRE_GPIOLIB
  848. select CLKDEV_LOOKUP
  849. select CLKSRC_MMIO
  850. select GENERIC_CLOCKEVENTS
  851. select GENERIC_IRQ_CHIP
  852. select HAVE_CLK
  853. select HAVE_IDE
  854. select IRQ_DOMAIN
  855. select NEED_MACH_IO_H if PCCARD
  856. select NEED_MACH_MEMORY_H
  857. help
  858. Support for older TI OMAP1 (omap7xx, omap15xx or omap16xx)
  859. endchoice
  860. menu "Multiple platform selection"
  861. depends on ARCH_MULTIPLATFORM
  862. comment "CPU Core family selection"
  863. config ARCH_MULTI_V4
  864. bool "ARMv4 based platforms (FA526, StrongARM)"
  865. depends on !ARCH_MULTI_V6_V7
  866. select ARCH_MULTI_V4_V5
  867. config ARCH_MULTI_V4T
  868. bool "ARMv4T based platforms (ARM720T, ARM920T, ...)"
  869. depends on !ARCH_MULTI_V6_V7
  870. select ARCH_MULTI_V4_V5
  871. config ARCH_MULTI_V5
  872. bool "ARMv5 based platforms (ARM926T, XSCALE, PJ1, ...)"
  873. depends on !ARCH_MULTI_V6_V7
  874. select ARCH_MULTI_V4_V5
  875. config ARCH_MULTI_V4_V5
  876. bool
  877. config ARCH_MULTI_V6
  878. bool "ARMv6 based platforms (ARM11, Scorpion, ...)"
  879. select ARCH_MULTI_V6_V7
  880. select CPU_V6
  881. config ARCH_MULTI_V7
  882. bool "ARMv7 based platforms (Cortex-A, PJ4, Krait)"
  883. default y
  884. select ARCH_MULTI_V6_V7
  885. select ARCH_VEXPRESS
  886. select CPU_V7
  887. config ARCH_MULTI_V6_V7
  888. bool
  889. config ARCH_MULTI_CPU_AUTO
  890. def_bool !(ARCH_MULTI_V4 || ARCH_MULTI_V4T || ARCH_MULTI_V6_V7)
  891. select ARCH_MULTI_V5
  892. endmenu
  893. #
  894. # This is sorted alphabetically by mach-* pathname. However, plat-*
  895. # Kconfigs may be included either alphabetically (according to the
  896. # plat- suffix) or along side the corresponding mach-* source.
  897. #
  898. source "arch/arm/mach-mvebu/Kconfig"
  899. source "arch/arm/mach-at91/Kconfig"
  900. source "arch/arm/mach-bcm/Kconfig"
  901. source "arch/arm/mach-clps711x/Kconfig"
  902. source "arch/arm/mach-cns3xxx/Kconfig"
  903. source "arch/arm/mach-davinci/Kconfig"
  904. source "arch/arm/mach-dove/Kconfig"
  905. source "arch/arm/mach-ep93xx/Kconfig"
  906. source "arch/arm/mach-footbridge/Kconfig"
  907. source "arch/arm/mach-gemini/Kconfig"
  908. source "arch/arm/mach-h720x/Kconfig"
  909. source "arch/arm/mach-highbank/Kconfig"
  910. source "arch/arm/mach-integrator/Kconfig"
  911. source "arch/arm/mach-iop32x/Kconfig"
  912. source "arch/arm/mach-iop33x/Kconfig"
  913. source "arch/arm/mach-iop13xx/Kconfig"
  914. source "arch/arm/mach-ixp4xx/Kconfig"
  915. source "arch/arm/mach-kirkwood/Kconfig"
  916. source "arch/arm/mach-ks8695/Kconfig"
  917. source "arch/arm/mach-msm/Kconfig"
  918. source "arch/arm/mach-mv78xx0/Kconfig"
  919. source "arch/arm/mach-imx/Kconfig"
  920. source "arch/arm/mach-mxs/Kconfig"
  921. source "arch/arm/mach-netx/Kconfig"
  922. source "arch/arm/mach-nomadik/Kconfig"
  923. source "arch/arm/plat-omap/Kconfig"
  924. source "arch/arm/mach-omap1/Kconfig"
  925. source "arch/arm/mach-omap2/Kconfig"
  926. source "arch/arm/mach-orion5x/Kconfig"
  927. source "arch/arm/mach-picoxcell/Kconfig"
  928. source "arch/arm/mach-pxa/Kconfig"
  929. source "arch/arm/plat-pxa/Kconfig"
  930. source "arch/arm/mach-mmp/Kconfig"
  931. source "arch/arm/mach-realview/Kconfig"
  932. source "arch/arm/mach-sa1100/Kconfig"
  933. source "arch/arm/plat-samsung/Kconfig"
  934. source "arch/arm/mach-socfpga/Kconfig"
  935. source "arch/arm/plat-spear/Kconfig"
  936. source "arch/arm/mach-s3c24xx/Kconfig"
  937. if ARCH_S3C64XX
  938. source "arch/arm/mach-s3c64xx/Kconfig"
  939. endif
  940. source "arch/arm/mach-s5p64x0/Kconfig"
  941. source "arch/arm/mach-s5pc100/Kconfig"
  942. source "arch/arm/mach-s5pv210/Kconfig"
  943. source "arch/arm/mach-exynos/Kconfig"
  944. source "arch/arm/mach-shmobile/Kconfig"
  945. source "arch/arm/mach-sunxi/Kconfig"
  946. source "arch/arm/mach-prima2/Kconfig"
  947. source "arch/arm/mach-tegra/Kconfig"
  948. source "arch/arm/mach-u300/Kconfig"
  949. source "arch/arm/mach-ux500/Kconfig"
  950. source "arch/arm/mach-versatile/Kconfig"
  951. source "arch/arm/mach-vexpress/Kconfig"
  952. source "arch/arm/plat-versatile/Kconfig"
  953. source "arch/arm/mach-vt8500/Kconfig"
  954. source "arch/arm/mach-w90x900/Kconfig"
  955. source "arch/arm/mach-zynq/Kconfig"
  956. # Definitions to make life easier
  957. config ARCH_ACORN
  958. bool
  959. config PLAT_IOP
  960. bool
  961. select GENERIC_CLOCKEVENTS
  962. config PLAT_ORION
  963. bool
  964. select CLKSRC_MMIO
  965. select COMMON_CLK
  966. select GENERIC_IRQ_CHIP
  967. select IRQ_DOMAIN
  968. config PLAT_ORION_LEGACY
  969. bool
  970. select PLAT_ORION
  971. config PLAT_PXA
  972. bool
  973. config PLAT_VERSATILE
  974. bool
  975. config ARM_TIMER_SP804
  976. bool
  977. select CLKSRC_MMIO
  978. select HAVE_SCHED_CLOCK
  979. source arch/arm/mm/Kconfig
  980. config ARM_NR_BANKS
  981. int
  982. default 16 if ARCH_EP93XX
  983. default 8
  984. config IWMMXT
  985. bool "Enable iWMMXt support"
  986. depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
  987. default y if PXA27x || PXA3xx || ARCH_MMP
  988. help
  989. Enable support for iWMMXt context switching at run time if
  990. running on a CPU that supports it.
  991. config XSCALE_PMU
  992. bool
  993. depends on CPU_XSCALE
  994. default y
  995. config MULTI_IRQ_HANDLER
  996. bool
  997. help
  998. Allow each machine to specify it's own IRQ handler at run time.
  999. if !MMU
  1000. source "arch/arm/Kconfig-nommu"
  1001. endif
  1002. config ARM_ERRATA_326103
  1003. bool "ARM errata: FSR write bit incorrect on a SWP to read-only memory"
  1004. depends on CPU_V6
  1005. help
  1006. Executing a SWP instruction to read-only memory does not set bit 11
  1007. of the FSR on the ARM 1136 prior to r1p0. This causes the kernel to
  1008. treat the access as a read, preventing a COW from occurring and
  1009. causing the faulting task to livelock.
  1010. config ARM_ERRATA_411920
  1011. bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
  1012. depends on CPU_V6 || CPU_V6K
  1013. help
  1014. Invalidation of the Instruction Cache operation can
  1015. fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
  1016. It does not affect the MPCore. This option enables the ARM Ltd.
  1017. recommended workaround.
  1018. config ARM_ERRATA_430973
  1019. bool "ARM errata: Stale prediction on replaced interworking branch"
  1020. depends on CPU_V7
  1021. help
  1022. This option enables the workaround for the 430973 Cortex-A8
  1023. (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
  1024. interworking branch is replaced with another code sequence at the
  1025. same virtual address, whether due to self-modifying code or virtual
  1026. to physical address re-mapping, Cortex-A8 does not recover from the
  1027. stale interworking branch prediction. This results in Cortex-A8
  1028. executing the new code sequence in the incorrect ARM or Thumb state.
  1029. The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
  1030. and also flushes the branch target cache at every context switch.
  1031. Note that setting specific bits in the ACTLR register may not be
  1032. available in non-secure mode.
  1033. config ARM_ERRATA_458693
  1034. bool "ARM errata: Processor deadlock when a false hazard is created"
  1035. depends on CPU_V7
  1036. depends on !ARCH_MULTIPLATFORM
  1037. help
  1038. This option enables the workaround for the 458693 Cortex-A8 (r2p0)
  1039. erratum. For very specific sequences of memory operations, it is
  1040. possible for a hazard condition intended for a cache line to instead
  1041. be incorrectly associated with a different cache line. This false
  1042. hazard might then cause a processor deadlock. The workaround enables
  1043. the L1 caching of the NEON accesses and disables the PLD instruction
  1044. in the ACTLR register. Note that setting specific bits in the ACTLR
  1045. register may not be available in non-secure mode.
  1046. config ARM_ERRATA_460075
  1047. bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
  1048. depends on CPU_V7
  1049. depends on !ARCH_MULTIPLATFORM
  1050. help
  1051. This option enables the workaround for the 460075 Cortex-A8 (r2p0)
  1052. erratum. Any asynchronous access to the L2 cache may encounter a
  1053. situation in which recent store transactions to the L2 cache are lost
  1054. and overwritten with stale memory contents from external memory. The
  1055. workaround disables the write-allocate mode for the L2 cache via the
  1056. ACTLR register. Note that setting specific bits in the ACTLR register
  1057. may not be available in non-secure mode.
  1058. config ARM_ERRATA_742230
  1059. bool "ARM errata: DMB operation may be faulty"
  1060. depends on CPU_V7 && SMP
  1061. depends on !ARCH_MULTIPLATFORM
  1062. help
  1063. This option enables the workaround for the 742230 Cortex-A9
  1064. (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
  1065. between two write operations may not ensure the correct visibility
  1066. ordering of the two writes. This workaround sets a specific bit in
  1067. the diagnostic register of the Cortex-A9 which causes the DMB
  1068. instruction to behave as a DSB, ensuring the correct behaviour of
  1069. the two writes.
  1070. config ARM_ERRATA_742231
  1071. bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
  1072. depends on CPU_V7 && SMP
  1073. depends on !ARCH_MULTIPLATFORM
  1074. help
  1075. This option enables the workaround for the 742231 Cortex-A9
  1076. (r2p0..r2p2) erratum. Under certain conditions, specific to the
  1077. Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
  1078. accessing some data located in the same cache line, may get corrupted
  1079. data due to bad handling of the address hazard when the line gets
  1080. replaced from one of the CPUs at the same time as another CPU is
  1081. accessing it. This workaround sets specific bits in the diagnostic
  1082. register of the Cortex-A9 which reduces the linefill issuing
  1083. capabilities of the processor.
  1084. config PL310_ERRATA_588369
  1085. bool "PL310 errata: Clean & Invalidate maintenance operations do not invalidate clean lines"
  1086. depends on CACHE_L2X0
  1087. help
  1088. The PL310 L2 cache controller implements three types of Clean &
  1089. Invalidate maintenance operations: by Physical Address
  1090. (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
  1091. They are architecturally defined to behave as the execution of a
  1092. clean operation followed immediately by an invalidate operation,
  1093. both performing to the same memory location. This functionality
  1094. is not correctly implemented in PL310 as clean lines are not
  1095. invalidated as a result of these operations.
  1096. config ARM_ERRATA_720789
  1097. bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
  1098. depends on CPU_V7
  1099. help
  1100. This option enables the workaround for the 720789 Cortex-A9 (prior to
  1101. r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
  1102. broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
  1103. As a consequence of this erratum, some TLB entries which should be
  1104. invalidated are not, resulting in an incoherency in the system page
  1105. tables. The workaround changes the TLB flushing routines to invalidate
  1106. entries regardless of the ASID.
  1107. config PL310_ERRATA_727915
  1108. bool "PL310 errata: Background Clean & Invalidate by Way operation can cause data corruption"
  1109. depends on CACHE_L2X0
  1110. help
  1111. PL310 implements the Clean & Invalidate by Way L2 cache maintenance
  1112. operation (offset 0x7FC). This operation runs in background so that
  1113. PL310 can handle normal accesses while it is in progress. Under very
  1114. rare circumstances, due to this erratum, write data can be lost when
  1115. PL310 treats a cacheable write transaction during a Clean &
  1116. Invalidate by Way operation.
  1117. config ARM_ERRATA_743622
  1118. bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
  1119. depends on CPU_V7
  1120. depends on !ARCH_MULTIPLATFORM
  1121. help
  1122. This option enables the workaround for the 743622 Cortex-A9
  1123. (r2p*) erratum. Under very rare conditions, a faulty
  1124. optimisation in the Cortex-A9 Store Buffer may lead to data
  1125. corruption. This workaround sets a specific bit in the diagnostic
  1126. register of the Cortex-A9 which disables the Store Buffer
  1127. optimisation, preventing the defect from occurring. This has no
  1128. visible impact on the overall performance or power consumption of the
  1129. processor.
  1130. config ARM_ERRATA_751472
  1131. bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
  1132. depends on CPU_V7
  1133. depends on !ARCH_MULTIPLATFORM
  1134. help
  1135. This option enables the workaround for the 751472 Cortex-A9 (prior
  1136. to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
  1137. completion of a following broadcasted operation if the second
  1138. operation is received by a CPU before the ICIALLUIS has completed,
  1139. potentially leading to corrupted entries in the cache or TLB.
  1140. config PL310_ERRATA_753970
  1141. bool "PL310 errata: cache sync operation may be faulty"
  1142. depends on CACHE_PL310
  1143. help
  1144. This option enables the workaround for the 753970 PL310 (r3p0) erratum.
  1145. Under some condition the effect of cache sync operation on
  1146. the store buffer still remains when the operation completes.
  1147. This means that the store buffer is always asked to drain and
  1148. this prevents it from merging any further writes. The workaround
  1149. is to replace the normal offset of cache sync operation (0x730)
  1150. by another offset targeting an unmapped PL310 register 0x740.
  1151. This has the same effect as the cache sync operation: store buffer
  1152. drain and waiting for all buffers empty.
  1153. config ARM_ERRATA_754322
  1154. bool "ARM errata: possible faulty MMU translations following an ASID switch"
  1155. depends on CPU_V7
  1156. help
  1157. This option enables the workaround for the 754322 Cortex-A9 (r2p*,
  1158. r3p*) erratum. A speculative memory access may cause a page table walk
  1159. which starts prior to an ASID switch but completes afterwards. This
  1160. can populate the micro-TLB with a stale entry which may be hit with
  1161. the new ASID. This workaround places two dsb instructions in the mm
  1162. switching code so that no page table walks can cross the ASID switch.
  1163. config ARM_ERRATA_754327
  1164. bool "ARM errata: no automatic Store Buffer drain"
  1165. depends on CPU_V7 && SMP
  1166. help
  1167. This option enables the workaround for the 754327 Cortex-A9 (prior to
  1168. r2p0) erratum. The Store Buffer does not have any automatic draining
  1169. mechanism and therefore a livelock may occur if an external agent
  1170. continuously polls a memory location waiting to observe an update.
  1171. This workaround defines cpu_relax() as smp_mb(), preventing correctly
  1172. written polling loops from denying visibility of updates to memory.
  1173. config ARM_ERRATA_364296
  1174. bool "ARM errata: Possible cache data corruption with hit-under-miss enabled"
  1175. depends on CPU_V6 && !SMP
  1176. help
  1177. This options enables the workaround for the 364296 ARM1136
  1178. r0p2 erratum (possible cache data corruption with
  1179. hit-under-miss enabled). It sets the undocumented bit 31 in
  1180. the auxiliary control register and the FI bit in the control
  1181. register, thus disabling hit-under-miss without putting the
  1182. processor into full low interrupt latency mode. ARM11MPCore
  1183. is not affected.
  1184. config ARM_ERRATA_764369
  1185. bool "ARM errata: Data cache line maintenance operation by MVA may not succeed"
  1186. depends on CPU_V7 && SMP
  1187. help
  1188. This option enables the workaround for erratum 764369
  1189. affecting Cortex-A9 MPCore with two or more processors (all
  1190. current revisions). Under certain timing circumstances, a data
  1191. cache line maintenance operation by MVA targeting an Inner
  1192. Shareable memory region may fail to proceed up to either the
  1193. Point of Coherency or to the Point of Unification of the
  1194. system. This workaround adds a DSB instruction before the
  1195. relevant cache maintenance functions and sets a specific bit
  1196. in the diagnostic control register of the SCU.
  1197. config PL310_ERRATA_769419
  1198. bool "PL310 errata: no automatic Store Buffer drain"
  1199. depends on CACHE_L2X0
  1200. help
  1201. On revisions of the PL310 prior to r3p2, the Store Buffer does
  1202. not automatically drain. This can cause normal, non-cacheable
  1203. writes to be retained when the memory system is idle, leading
  1204. to suboptimal I/O performance for drivers using coherent DMA.
  1205. This option adds a write barrier to the cpu_idle loop so that,
  1206. on systems with an outer cache, the store buffer is drained
  1207. explicitly.
  1208. config ARM_ERRATA_775420
  1209. bool "ARM errata: A data cache maintenance operation which aborts, might lead to deadlock"
  1210. depends on CPU_V7
  1211. help
  1212. This option enables the workaround for the 775420 Cortex-A9 (r2p2,
  1213. r2p6,r2p8,r2p10,r3p0) erratum. In case a date cache maintenance
  1214. operation aborts with MMU exception, it might cause the processor
  1215. to deadlock. This workaround puts DSB before executing ISB if
  1216. an abort may occur on cache maintenance.
  1217. endmenu
  1218. source "arch/arm/common/Kconfig"
  1219. menu "Bus support"
  1220. config ARM_AMBA
  1221. bool
  1222. config ISA
  1223. bool
  1224. help
  1225. Find out whether you have ISA slots on your motherboard. ISA is the
  1226. name of a bus system, i.e. the way the CPU talks to the other stuff
  1227. inside your box. Other bus systems are PCI, EISA, MicroChannel
  1228. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  1229. newer boards don't support it. If you have ISA, say Y, otherwise N.
  1230. # Select ISA DMA controller support
  1231. config ISA_DMA
  1232. bool
  1233. select ISA_DMA_API
  1234. config ARCH_NO_VIRT_TO_BUS
  1235. def_bool y
  1236. depends on !ARCH_RPC && !ARCH_NETWINDER && !ARCH_SHARK
  1237. # Select ISA DMA interface
  1238. config ISA_DMA_API
  1239. bool
  1240. config PCI
  1241. bool "PCI support" if MIGHT_HAVE_PCI
  1242. help
  1243. Find out whether you have a PCI motherboard. PCI is the name of a
  1244. bus system, i.e. the way the CPU talks to the other stuff inside
  1245. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  1246. VESA. If you have PCI, say Y, otherwise N.
  1247. config PCI_DOMAINS
  1248. bool
  1249. depends on PCI
  1250. config PCI_NANOENGINE
  1251. bool "BSE nanoEngine PCI support"
  1252. depends on SA1100_NANOENGINE
  1253. help
  1254. Enable PCI on the BSE nanoEngine board.
  1255. config PCI_SYSCALL
  1256. def_bool PCI
  1257. # Select the host bridge type
  1258. config PCI_HOST_VIA82C505
  1259. bool
  1260. depends on PCI && ARCH_SHARK
  1261. default y
  1262. config PCI_HOST_ITE8152
  1263. bool
  1264. depends on PCI && MACH_ARMCORE
  1265. default y
  1266. select DMABOUNCE
  1267. source "drivers/pci/Kconfig"
  1268. source "drivers/pcmcia/Kconfig"
  1269. endmenu
  1270. menu "Kernel Features"
  1271. config HAVE_SMP
  1272. bool
  1273. help
  1274. This option should be selected by machines which have an SMP-
  1275. capable CPU.
  1276. The only effect of this option is to make the SMP-related
  1277. options available to the user for configuration.
  1278. config SMP
  1279. bool "Symmetric Multi-Processing"
  1280. depends on CPU_V6K || CPU_V7
  1281. depends on GENERIC_CLOCKEVENTS
  1282. depends on HAVE_SMP
  1283. depends on MMU
  1284. select HAVE_ARM_SCU if !ARCH_MSM_SCORPIONMP
  1285. select USE_GENERIC_SMP_HELPERS
  1286. help
  1287. This enables support for systems with more than one CPU. If you have
  1288. a system with only one CPU, like most personal computers, say N. If
  1289. you have a system with more than one CPU, say Y.
  1290. If you say N here, the kernel will run on single and multiprocessor
  1291. machines, but will use only one CPU of a multiprocessor machine. If
  1292. you say Y here, the kernel will run on many, but not all, single
  1293. processor machines. On a single processor machine, the kernel will
  1294. run faster if you say N here.
  1295. See also <file:Documentation/x86/i386/IO-APIC.txt>,
  1296. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  1297. <http://tldp.org/HOWTO/SMP-HOWTO.html>.
  1298. If you don't know what to do here, say N.
  1299. config SMP_ON_UP
  1300. bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
  1301. depends on SMP && !XIP_KERNEL
  1302. default y
  1303. help
  1304. SMP kernels contain instructions which fail on non-SMP processors.
  1305. Enabling this option allows the kernel to modify itself to make
  1306. these instructions safe. Disabling it allows about 1K of space
  1307. savings.
  1308. If you don't know what to do here, say Y.
  1309. config ARM_CPU_TOPOLOGY
  1310. bool "Support cpu topology definition"
  1311. depends on SMP && CPU_V7
  1312. default y
  1313. help
  1314. Support ARM cpu topology definition. The MPIDR register defines
  1315. affinity between processors which is then used to describe the cpu
  1316. topology of an ARM System.
  1317. config SCHED_MC
  1318. bool "Multi-core scheduler support"
  1319. depends on ARM_CPU_TOPOLOGY
  1320. help
  1321. Multi-core scheduler support improves the CPU scheduler's decision
  1322. making when dealing with multi-core CPU chips at a cost of slightly
  1323. increased overhead in some places. If unsure say N here.
  1324. config SCHED_SMT
  1325. bool "SMT scheduler support"
  1326. depends on ARM_CPU_TOPOLOGY
  1327. help
  1328. Improves the CPU scheduler's decision making when dealing with
  1329. MultiThreading at a cost of slightly increased overhead in some
  1330. places. If unsure say N here.
  1331. config HAVE_ARM_SCU
  1332. bool
  1333. help
  1334. This option enables support for the ARM system coherency unit
  1335. config ARM_ARCH_TIMER
  1336. bool "Architected timer support"
  1337. depends on CPU_V7
  1338. help
  1339. This option enables support for the ARM architected timer
  1340. config HAVE_ARM_TWD
  1341. bool
  1342. depends on SMP
  1343. help
  1344. This options enables support for the ARM timer and watchdog unit
  1345. choice
  1346. prompt "Memory split"
  1347. default VMSPLIT_3G
  1348. help
  1349. Select the desired split between kernel and user memory.
  1350. If you are not absolutely sure what you are doing, leave this
  1351. option alone!
  1352. config VMSPLIT_3G
  1353. bool "3G/1G user/kernel split"
  1354. config VMSPLIT_2G
  1355. bool "2G/2G user/kernel split"
  1356. config VMSPLIT_1G
  1357. bool "1G/3G user/kernel split"
  1358. endchoice
  1359. config PAGE_OFFSET
  1360. hex
  1361. default 0x40000000 if VMSPLIT_1G
  1362. default 0x80000000 if VMSPLIT_2G
  1363. default 0xC0000000
  1364. config NR_CPUS
  1365. int "Maximum number of CPUs (2-32)"
  1366. range 2 32
  1367. depends on SMP
  1368. default "4"
  1369. config HOTPLUG_CPU
  1370. bool "Support for hot-pluggable CPUs"
  1371. depends on SMP && HOTPLUG
  1372. help
  1373. Say Y here to experiment with turning CPUs off and on. CPUs
  1374. can be controlled through /sys/devices/system/cpu.
  1375. config ARM_PSCI
  1376. bool "Support for the ARM Power State Coordination Interface (PSCI)"
  1377. depends on CPU_V7
  1378. help
  1379. Say Y here if you want Linux to communicate with system firmware
  1380. implementing the PSCI specification for CPU-centric power
  1381. management operations described in ARM document number ARM DEN
  1382. 0022A ("Power State Coordination Interface System Software on
  1383. ARM processors").
  1384. config LOCAL_TIMERS
  1385. bool "Use local timer interrupts"
  1386. depends on SMP
  1387. default y
  1388. select HAVE_ARM_TWD if (!ARCH_MSM_SCORPIONMP && !EXYNOS4_MCT)
  1389. help
  1390. Enable support for local timers on SMP platforms, rather then the
  1391. legacy IPI broadcast method. Local timers allows the system
  1392. accounting to be spread across the timer interval, preventing a
  1393. "thundering herd" at every timer tick.
  1394. config ARCH_NR_GPIO
  1395. int
  1396. default 1024 if ARCH_SHMOBILE || ARCH_TEGRA
  1397. default 355 if ARCH_U8500
  1398. default 264 if MACH_H4700
  1399. default 512 if SOC_OMAP5
  1400. default 288 if ARCH_VT8500 || ARCH_SUNXI
  1401. default 0
  1402. help
  1403. Maximum number of GPIOs in the system.
  1404. If unsure, leave the default value.
  1405. source kernel/Kconfig.preempt
  1406. config HZ
  1407. int
  1408. default 200 if ARCH_EBSA110 || ARCH_S3C24XX || ARCH_S5P64X0 || \
  1409. ARCH_S5PV210 || ARCH_EXYNOS4
  1410. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  1411. default AT91_TIMER_HZ if ARCH_AT91
  1412. default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
  1413. default 100
  1414. config SCHED_HRTICK
  1415. def_bool HIGH_RES_TIMERS
  1416. config THUMB2_KERNEL
  1417. bool "Compile the kernel in Thumb-2 mode"
  1418. depends on CPU_V7 && !CPU_V6 && !CPU_V6K
  1419. select AEABI
  1420. select ARM_ASM_UNIFIED
  1421. select ARM_UNWIND
  1422. help
  1423. By enabling this option, the kernel will be compiled in
  1424. Thumb-2 mode. A compiler/assembler that understand the unified
  1425. ARM-Thumb syntax is needed.
  1426. If unsure, say N.
  1427. config THUMB2_AVOID_R_ARM_THM_JUMP11
  1428. bool "Work around buggy Thumb-2 short branch relocations in gas"
  1429. depends on THUMB2_KERNEL && MODULES
  1430. default y
  1431. help
  1432. Various binutils versions can resolve Thumb-2 branches to
  1433. locally-defined, preemptible global symbols as short-range "b.n"
  1434. branch instructions.
  1435. This is a problem, because there's no guarantee the final
  1436. destination of the symbol, or any candidate locations for a
  1437. trampoline, are within range of the branch. For this reason, the
  1438. kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
  1439. relocation in modules at all, and it makes little sense to add
  1440. support.
  1441. The symptom is that the kernel fails with an "unsupported
  1442. relocation" error when loading some modules.
  1443. Until fixed tools are available, passing
  1444. -fno-optimize-sibling-calls to gcc should prevent gcc generating
  1445. code which hits this problem, at the cost of a bit of extra runtime
  1446. stack usage in some cases.
  1447. The problem is described in more detail at:
  1448. https://bugs.launchpad.net/binutils-linaro/+bug/725126
  1449. Only Thumb-2 kernels are affected.
  1450. Unless you are sure your tools don't have this problem, say Y.
  1451. config ARM_ASM_UNIFIED
  1452. bool
  1453. config AEABI
  1454. bool "Use the ARM EABI to compile the kernel"
  1455. help
  1456. This option allows for the kernel to be compiled using the latest
  1457. ARM ABI (aka EABI). This is only useful if you are using a user
  1458. space environment that is also compiled with EABI.
  1459. Since there are major incompatibilities between the legacy ABI and
  1460. EABI, especially with regard to structure member alignment, this
  1461. option also changes the kernel syscall calling convention to
  1462. disambiguate both ABIs and allow for backward compatibility support
  1463. (selected with CONFIG_OABI_COMPAT).
  1464. To use this you need GCC version 4.0.0 or later.
  1465. config OABI_COMPAT
  1466. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  1467. depends on AEABI && !THUMB2_KERNEL
  1468. default y
  1469. help
  1470. This option preserves the old syscall interface along with the
  1471. new (ARM EABI) one. It also provides a compatibility layer to
  1472. intercept syscalls that have structure arguments which layout
  1473. in memory differs between the legacy ABI and the new ARM EABI
  1474. (only for non "thumb" binaries). This option adds a tiny
  1475. overhead to all syscalls and produces a slightly larger kernel.
  1476. If you know you'll be using only pure EABI user space then you
  1477. can say N here. If this option is not selected and you attempt
  1478. to execute a legacy ABI binary then the result will be
  1479. UNPREDICTABLE (in fact it can be predicted that it won't work
  1480. at all). If in doubt say Y.
  1481. config ARCH_HAS_HOLES_MEMORYMODEL
  1482. bool
  1483. config ARCH_SPARSEMEM_ENABLE
  1484. bool
  1485. config ARCH_SPARSEMEM_DEFAULT
  1486. def_bool ARCH_SPARSEMEM_ENABLE
  1487. config ARCH_SELECT_MEMORY_MODEL
  1488. def_bool ARCH_SPARSEMEM_ENABLE
  1489. config HAVE_ARCH_PFN_VALID
  1490. def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
  1491. config HIGHMEM
  1492. bool "High Memory Support"
  1493. depends on MMU
  1494. help
  1495. The address space of ARM processors is only 4 Gigabytes large
  1496. and it has to accommodate user address space, kernel address
  1497. space as well as some memory mapped IO. That means that, if you
  1498. have a large amount of physical memory and/or IO, not all of the
  1499. memory can be "permanently mapped" by the kernel. The physical
  1500. memory that is not permanently mapped is called "high memory".
  1501. Depending on the selected kernel/user memory split, minimum
  1502. vmalloc space and actual amount of RAM, you may not need this
  1503. option which should result in a slightly faster kernel.
  1504. If unsure, say n.
  1505. config HIGHPTE
  1506. bool "Allocate 2nd-level pagetables from highmem"
  1507. depends on HIGHMEM
  1508. config HW_PERF_EVENTS
  1509. bool "Enable hardware performance counter support for perf events"
  1510. depends on PERF_EVENTS
  1511. default y
  1512. help
  1513. Enable hardware performance counter support for perf events. If
  1514. disabled, perf events will use software events only.
  1515. source "mm/Kconfig"
  1516. config FORCE_MAX_ZONEORDER
  1517. int "Maximum zone order" if ARCH_SHMOBILE
  1518. range 11 64 if ARCH_SHMOBILE
  1519. default "12" if SOC_AM33XX
  1520. default "9" if SA1111
  1521. default "11"
  1522. help
  1523. The kernel memory allocator divides physically contiguous memory
  1524. blocks into "zones", where each zone is a power of two number of
  1525. pages. This option selects the largest power of two that the kernel
  1526. keeps in the memory allocator. If you need to allocate very large
  1527. blocks of physically contiguous memory, then you may need to
  1528. increase this value.
  1529. This config option is actually maximum order plus one. For example,
  1530. a value of 11 means that the largest free memory block is 2^10 pages.
  1531. config ALIGNMENT_TRAP
  1532. bool
  1533. depends on CPU_CP15_MMU
  1534. default y if !ARCH_EBSA110
  1535. select HAVE_PROC_CPU if PROC_FS
  1536. help
  1537. ARM processors cannot fetch/store information which is not
  1538. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  1539. address divisible by 4. On 32-bit ARM processors, these non-aligned
  1540. fetch/store instructions will be emulated in software if you say
  1541. here, which has a severe performance impact. This is necessary for
  1542. correct operation of some network protocols. With an IP-only
  1543. configuration it is safe to say N, otherwise say Y.
  1544. config UACCESS_WITH_MEMCPY
  1545. bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user()"
  1546. depends on MMU
  1547. default y if CPU_FEROCEON
  1548. help
  1549. Implement faster copy_to_user and clear_user methods for CPU
  1550. cores where a 8-word STM instruction give significantly higher
  1551. memory write throughput than a sequence of individual 32bit stores.
  1552. A possible side effect is a slight increase in scheduling latency
  1553. between threads sharing the same address space if they invoke
  1554. such copy operations with large buffers.
  1555. However, if the CPU data cache is using a write-allocate mode,
  1556. this option is unlikely to provide any performance gain.
  1557. config SECCOMP
  1558. bool
  1559. prompt "Enable seccomp to safely compute untrusted bytecode"
  1560. ---help---
  1561. This kernel feature is useful for number crunching applications
  1562. that may need to compute untrusted bytecode during their
  1563. execution. By using pipes or other transports made available to
  1564. the process as file descriptors supporting the read/write
  1565. syscalls, it's possible to isolate those applications in
  1566. their own address space using seccomp. Once seccomp is
  1567. enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
  1568. and the task is only allowed to execute a few safe syscalls
  1569. defined by each seccomp mode.
  1570. config CC_STACKPROTECTOR
  1571. bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
  1572. help
  1573. This option turns on the -fstack-protector GCC feature. This
  1574. feature puts, at the beginning of functions, a canary value on
  1575. the stack just before the return address, and validates
  1576. the value just before actually returning. Stack based buffer
  1577. overflows (that need to overwrite this return address) now also
  1578. overwrite the canary, which gets detected and the attack is then
  1579. neutralized via a kernel panic.
  1580. This feature requires gcc version 4.2 or above.
  1581. config XEN_DOM0
  1582. def_bool y
  1583. depends on XEN
  1584. config XEN
  1585. bool "Xen guest support on ARM (EXPERIMENTAL)"
  1586. depends on ARM && OF
  1587. depends on CPU_V7 && !CPU_V6
  1588. help
  1589. Say Y if you want to run Linux in a Virtual Machine on Xen on ARM.
  1590. endmenu
  1591. menu "Boot options"
  1592. config USE_OF
  1593. bool "Flattened Device Tree support"
  1594. select IRQ_DOMAIN
  1595. select OF
  1596. select OF_EARLY_FLATTREE
  1597. help
  1598. Include support for flattened device tree machine descriptions.
  1599. config ATAGS
  1600. bool "Support for the traditional ATAGS boot data passing" if USE_OF
  1601. default y
  1602. help
  1603. This is the traditional way of passing data to the kernel at boot
  1604. time. If you are solely relying on the flattened device tree (or
  1605. the ARM_ATAG_DTB_COMPAT option) then you may unselect this option
  1606. to remove ATAGS support from your kernel binary. If unsure,
  1607. leave this to y.
  1608. config DEPRECATED_PARAM_STRUCT
  1609. bool "Provide old way to pass kernel parameters"
  1610. depends on ATAGS
  1611. help
  1612. This was deprecated in 2001 and announced to live on for 5 years.
  1613. Some old boot loaders still use this way.
  1614. # Compressed boot loader in ROM. Yes, we really want to ask about
  1615. # TEXT and BSS so we preserve their values in the config files.
  1616. config ZBOOT_ROM_TEXT
  1617. hex "Compressed ROM boot loader base address"
  1618. default "0"
  1619. help
  1620. The physical address at which the ROM-able zImage is to be
  1621. placed in the target. Platforms which normally make use of
  1622. ROM-able zImage formats normally set this to a suitable
  1623. value in their defconfig file.
  1624. If ZBOOT_ROM is not enabled, this has no effect.
  1625. config ZBOOT_ROM_BSS
  1626. hex "Compressed ROM boot loader BSS address"
  1627. default "0"
  1628. help
  1629. The base address of an area of read/write memory in the target
  1630. for the ROM-able zImage which must be available while the
  1631. decompressor is running. It must be large enough to hold the
  1632. entire decompressed kernel plus an additional 128 KiB.
  1633. Platforms which normally make use of ROM-able zImage formats
  1634. normally set this to a suitable value in their defconfig file.
  1635. If ZBOOT_ROM is not enabled, this has no effect.
  1636. config ZBOOT_ROM
  1637. bool "Compressed boot loader in ROM/flash"
  1638. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  1639. help
  1640. Say Y here if you intend to execute your compressed kernel image
  1641. (zImage) directly from ROM or flash. If unsure, say N.
  1642. choice
  1643. prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)"
  1644. depends on ZBOOT_ROM && ARCH_SH7372
  1645. default ZBOOT_ROM_NONE
  1646. help
  1647. Include experimental SD/MMC loading code in the ROM-able zImage.
  1648. With this enabled it is possible to write the ROM-able zImage
  1649. kernel image to an MMC or SD card and boot the kernel straight
  1650. from the reset vector. At reset the processor Mask ROM will load
  1651. the first part of the ROM-able zImage which in turn loads the
  1652. rest the kernel image to RAM.
  1653. config ZBOOT_ROM_NONE
  1654. bool "No SD/MMC loader in zImage (EXPERIMENTAL)"
  1655. help
  1656. Do not load image from SD or MMC
  1657. config ZBOOT_ROM_MMCIF
  1658. bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
  1659. help
  1660. Load image from MMCIF hardware block.
  1661. config ZBOOT_ROM_SH_MOBILE_SDHI
  1662. bool "Include SuperH Mobile SDHI loader in zImage (EXPERIMENTAL)"
  1663. help
  1664. Load image from SDHI hardware block
  1665. endchoice
  1666. config ARM_APPENDED_DTB
  1667. bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
  1668. depends on OF && !ZBOOT_ROM
  1669. help
  1670. With this option, the boot code will look for a device tree binary
  1671. (DTB) appended to zImage
  1672. (e.g. cat zImage <filename>.dtb > zImage_w_dtb).
  1673. This is meant as a backward compatibility convenience for those
  1674. systems with a bootloader that can't be upgraded to accommodate
  1675. the documented boot protocol using a device tree.
  1676. Beware that there is very little in terms of protection against
  1677. this option being confused by leftover garbage in memory that might
  1678. look like a DTB header after a reboot if no actual DTB is appended
  1679. to zImage. Do not leave this option active in a production kernel
  1680. if you don't intend to always append a DTB. Proper passing of the
  1681. location into r2 of a bootloader provided DTB is always preferable
  1682. to this option.
  1683. config ARM_ATAG_DTB_COMPAT
  1684. bool "Supplement the appended DTB with traditional ATAG information"
  1685. depends on ARM_APPENDED_DTB
  1686. help
  1687. Some old bootloaders can't be updated to a DTB capable one, yet
  1688. they provide ATAGs with memory configuration, the ramdisk address,
  1689. the kernel cmdline string, etc. Such information is dynamically
  1690. provided by the bootloader and can't always be stored in a static
  1691. DTB. To allow a device tree enabled kernel to be used with such
  1692. bootloaders, this option allows zImage to extract the information
  1693. from the ATAG list and store it at run time into the appended DTB.
  1694. choice
  1695. prompt "Kernel command line type" if ARM_ATAG_DTB_COMPAT
  1696. default ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
  1697. config ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
  1698. bool "Use bootloader kernel arguments if available"
  1699. help
  1700. Uses the command-line options passed by the boot loader instead of
  1701. the device tree bootargs property. If the boot loader doesn't provide
  1702. any, the device tree bootargs property will be used.
  1703. config ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEND
  1704. bool "Extend with bootloader kernel arguments"
  1705. help
  1706. The command-line arguments provided by the boot loader will be
  1707. appended to the the device tree bootargs property.
  1708. endchoice
  1709. config CMDLINE
  1710. string "Default kernel command string"
  1711. default ""
  1712. help
  1713. On some architectures (EBSA110 and CATS), there is currently no way
  1714. for the boot loader to pass arguments to the kernel. For these
  1715. architectures, you should supply some command-line options at build
  1716. time by entering them here. As a minimum, you should specify the
  1717. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  1718. choice
  1719. prompt "Kernel command line type" if CMDLINE != ""
  1720. default CMDLINE_FROM_BOOTLOADER
  1721. depends on ATAGS
  1722. config CMDLINE_FROM_BOOTLOADER
  1723. bool "Use bootloader kernel arguments if available"
  1724. help
  1725. Uses the command-line options passed by the boot loader. If
  1726. the boot loader doesn't provide any, the default kernel command
  1727. string provided in CMDLINE will be used.
  1728. config CMDLINE_EXTEND
  1729. bool "Extend bootloader kernel arguments"
  1730. help
  1731. The command-line arguments provided by the boot loader will be
  1732. appended to the default kernel command string.
  1733. config CMDLINE_FORCE
  1734. bool "Always use the default kernel command string"
  1735. help
  1736. Always use the default kernel command string, even if the boot
  1737. loader passes other arguments to the kernel.
  1738. This is useful if you cannot or don't want to change the
  1739. command-line options your boot loader passes to the kernel.
  1740. endchoice
  1741. config XIP_KERNEL
  1742. bool "Kernel Execute-In-Place from ROM"
  1743. depends on !ZBOOT_ROM && !ARM_LPAE && !ARCH_MULTIPLATFORM
  1744. help
  1745. Execute-In-Place allows the kernel to run from non-volatile storage
  1746. directly addressable by the CPU, such as NOR flash. This saves RAM
  1747. space since the text section of the kernel is not loaded from flash
  1748. to RAM. Read-write sections, such as the data section and stack,
  1749. are still copied to RAM. The XIP kernel is not compressed since
  1750. it has to run directly from flash, so it will take more space to
  1751. store it. The flash address used to link the kernel object files,
  1752. and for storing it, is configuration dependent. Therefore, if you
  1753. say Y here, you must know the proper physical address where to
  1754. store the kernel image depending on your own flash memory usage.
  1755. Also note that the make target becomes "make xipImage" rather than
  1756. "make zImage" or "make Image". The final kernel binary to put in
  1757. ROM memory will be arch/arm/boot/xipImage.
  1758. If unsure, say N.
  1759. config XIP_PHYS_ADDR
  1760. hex "XIP Kernel Physical Location"
  1761. depends on XIP_KERNEL
  1762. default "0x00080000"
  1763. help
  1764. This is the physical address in your flash memory the kernel will
  1765. be linked for and stored to. This address is dependent on your
  1766. own flash usage.
  1767. config KEXEC
  1768. bool "Kexec system call (EXPERIMENTAL)"
  1769. depends on (!SMP || HOTPLUG_CPU)
  1770. help
  1771. kexec is a system call that implements the ability to shutdown your
  1772. current kernel, and to start another kernel. It is like a reboot
  1773. but it is independent of the system firmware. And like a reboot
  1774. you can start any kernel with it, not just Linux.
  1775. It is an ongoing process to be certain the hardware in a machine
  1776. is properly shutdown, so do not be surprised if this code does not
  1777. initially work for you. It may help to enable device hotplugging
  1778. support.
  1779. config ATAGS_PROC
  1780. bool "Export atags in procfs"
  1781. depends on ATAGS && KEXEC
  1782. default y
  1783. help
  1784. Should the atags used to boot the kernel be exported in an "atags"
  1785. file in procfs. Useful with kexec.
  1786. config CRASH_DUMP
  1787. bool "Build kdump crash kernel (EXPERIMENTAL)"
  1788. help
  1789. Generate crash dump after being started by kexec. This should
  1790. be normally only set in special crash dump kernels which are
  1791. loaded in the main kernel with kexec-tools into a specially
  1792. reserved region and then later executed after a crash by
  1793. kdump/kexec. The crash dump kernel must be compiled to a
  1794. memory address not used by the main kernel
  1795. For more details see Documentation/kdump/kdump.txt
  1796. config AUTO_ZRELADDR
  1797. bool "Auto calculation of the decompressed kernel image address"
  1798. depends on !ZBOOT_ROM && !ARCH_U300
  1799. help
  1800. ZRELADDR is the physical address where the decompressed kernel
  1801. image will be placed. If AUTO_ZRELADDR is selected, the address
  1802. will be determined at run-time by masking the current IP with
  1803. 0xf8000000. This assumes the zImage being placed in the first 128MB
  1804. from start of memory.
  1805. endmenu
  1806. menu "CPU Power Management"
  1807. if ARCH_HAS_CPUFREQ
  1808. source "drivers/cpufreq/Kconfig"
  1809. config CPU_FREQ_IMX
  1810. tristate "CPUfreq driver for i.MX CPUs"
  1811. depends on ARCH_MXC && CPU_FREQ
  1812. select CPU_FREQ_TABLE
  1813. help
  1814. This enables the CPUfreq driver for i.MX CPUs.
  1815. config CPU_FREQ_SA1100
  1816. bool
  1817. config CPU_FREQ_SA1110
  1818. bool
  1819. config CPU_FREQ_INTEGRATOR
  1820. tristate "CPUfreq driver for ARM Integrator CPUs"
  1821. depends on ARCH_INTEGRATOR && CPU_FREQ
  1822. default y
  1823. help
  1824. This enables the CPUfreq driver for ARM Integrator CPUs.
  1825. For details, take a look at <file:Documentation/cpu-freq>.
  1826. If in doubt, say Y.
  1827. config CPU_FREQ_PXA
  1828. bool
  1829. depends on CPU_FREQ && ARCH_PXA && PXA25x
  1830. default y
  1831. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  1832. select CPU_FREQ_TABLE
  1833. config CPU_FREQ_S3C
  1834. bool
  1835. help
  1836. Internal configuration node for common cpufreq on Samsung SoC
  1837. config CPU_FREQ_S3C24XX
  1838. bool "CPUfreq driver for Samsung S3C24XX series CPUs (EXPERIMENTAL)"
  1839. depends on ARCH_S3C24XX && CPU_FREQ
  1840. select CPU_FREQ_S3C
  1841. help
  1842. This enables the CPUfreq driver for the Samsung S3C24XX family
  1843. of CPUs.
  1844. For details, take a look at <file:Documentation/cpu-freq>.
  1845. If in doubt, say N.
  1846. config CPU_FREQ_S3C24XX_PLL
  1847. bool "Support CPUfreq changing of PLL frequency (EXPERIMENTAL)"
  1848. depends on CPU_FREQ_S3C24XX
  1849. help
  1850. Compile in support for changing the PLL frequency from the
  1851. S3C24XX series CPUfreq driver. The PLL takes time to settle
  1852. after a frequency change, so by default it is not enabled.
  1853. This also means that the PLL tables for the selected CPU(s) will
  1854. be built which may increase the size of the kernel image.
  1855. config CPU_FREQ_S3C24XX_DEBUG
  1856. bool "Debug CPUfreq Samsung driver core"
  1857. depends on CPU_FREQ_S3C24XX
  1858. help
  1859. Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
  1860. config CPU_FREQ_S3C24XX_IODEBUG
  1861. bool "Debug CPUfreq Samsung driver IO timing"
  1862. depends on CPU_FREQ_S3C24XX
  1863. help
  1864. Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
  1865. config CPU_FREQ_S3C24XX_DEBUGFS
  1866. bool "Export debugfs for CPUFreq"
  1867. depends on CPU_FREQ_S3C24XX && DEBUG_FS
  1868. help
  1869. Export status information via debugfs.
  1870. endif
  1871. source "drivers/cpuidle/Kconfig"
  1872. endmenu
  1873. menu "Floating point emulation"
  1874. comment "At least one emulation must be selected"
  1875. config FPE_NWFPE
  1876. bool "NWFPE math emulation"
  1877. depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
  1878. ---help---
  1879. Say Y to include the NWFPE floating point emulator in the kernel.
  1880. This is necessary to run most binaries. Linux does not currently
  1881. support floating point hardware so you need to say Y here even if
  1882. your machine has an FPA or floating point co-processor podule.
  1883. You may say N here if you are going to load the Acorn FPEmulator
  1884. early in the bootup.
  1885. config FPE_NWFPE_XP
  1886. bool "Support extended precision"
  1887. depends on FPE_NWFPE
  1888. help
  1889. Say Y to include 80-bit support in the kernel floating-point
  1890. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  1891. Note that gcc does not generate 80-bit operations by default,
  1892. so in most cases this option only enlarges the size of the
  1893. floating point emulator without any good reason.
  1894. You almost surely want to say N here.
  1895. config FPE_FASTFPE
  1896. bool "FastFPE math emulation (EXPERIMENTAL)"
  1897. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3
  1898. ---help---
  1899. Say Y here to include the FAST floating point emulator in the kernel.
  1900. This is an experimental much faster emulator which now also has full
  1901. precision for the mantissa. It does not support any exceptions.
  1902. It is very simple, and approximately 3-6 times faster than NWFPE.
  1903. It should be sufficient for most programs. It may be not suitable
  1904. for scientific calculations, but you have to check this for yourself.
  1905. If you do not feel you need a faster FP emulation you should better
  1906. choose NWFPE.
  1907. config VFP
  1908. bool "VFP-format floating point maths"
  1909. depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  1910. help
  1911. Say Y to include VFP support code in the kernel. This is needed
  1912. if your hardware includes a VFP unit.
  1913. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  1914. release notes and additional status information.
  1915. Say N if your target does not have VFP hardware.
  1916. config VFPv3
  1917. bool
  1918. depends on VFP
  1919. default y if CPU_V7
  1920. config NEON
  1921. bool "Advanced SIMD (NEON) Extension support"
  1922. depends on VFPv3 && CPU_V7
  1923. help
  1924. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  1925. Extension.
  1926. endmenu
  1927. menu "Userspace binary formats"
  1928. source "fs/Kconfig.binfmt"
  1929. config ARTHUR
  1930. tristate "RISC OS personality"
  1931. depends on !AEABI
  1932. help
  1933. Say Y here to include the kernel code necessary if you want to run
  1934. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  1935. experimental; if this sounds frightening, say N and sleep in peace.
  1936. You can also say M here to compile this support as a module (which
  1937. will be called arthur).
  1938. endmenu
  1939. menu "Power management options"
  1940. source "kernel/power/Kconfig"
  1941. config ARCH_SUSPEND_POSSIBLE
  1942. depends on !ARCH_S5PC100
  1943. depends on CPU_ARM920T || CPU_ARM926T || CPU_SA1100 || \
  1944. CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE || CPU_MOHAWK
  1945. def_bool y
  1946. config ARM_CPU_SUSPEND
  1947. def_bool PM_SLEEP
  1948. endmenu
  1949. source "net/Kconfig"
  1950. source "drivers/Kconfig"
  1951. source "fs/Kconfig"
  1952. source "arch/arm/Kconfig.debug"
  1953. source "security/Kconfig"
  1954. source "crypto/Kconfig"
  1955. source "lib/Kconfig"
  1956. source "arch/arm/kvm/Kconfig"