Kconfig 65 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_IDLE_POLL_SETUP
  19. select GENERIC_STRNCPY_FROM_USER
  20. select GENERIC_STRNLEN_USER
  21. select HARDIRQS_SW_RESEND
  22. select HAVE_AOUT
  23. select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL
  24. select HAVE_ARCH_KGDB
  25. select HAVE_ARCH_SECCOMP_FILTER
  26. select HAVE_ARCH_TRACEHOOK
  27. select HAVE_BPF_JIT
  28. select HAVE_C_RECORDMCOUNT
  29. select HAVE_DEBUG_KMEMLEAK
  30. select HAVE_DMA_API_DEBUG
  31. select HAVE_DMA_ATTRS
  32. select HAVE_DMA_CONTIGUOUS if MMU
  33. select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL)
  34. select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
  35. select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL)
  36. select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
  37. select HAVE_GENERIC_DMA_COHERENT
  38. select HAVE_GENERIC_HARDIRQS
  39. select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7))
  40. select HAVE_IDE if PCI || ISA || PCMCIA
  41. select HAVE_IRQ_TIME_ACCOUNTING
  42. select HAVE_KERNEL_GZIP
  43. select HAVE_KERNEL_LZMA
  44. select HAVE_KERNEL_LZO
  45. select HAVE_KERNEL_XZ
  46. select HAVE_KPROBES if !XIP_KERNEL
  47. select HAVE_KRETPROBES if (HAVE_KPROBES)
  48. select HAVE_MEMBLOCK
  49. select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
  50. select HAVE_PERF_EVENTS
  51. select HAVE_REGS_AND_STACK_ACCESS_API
  52. select HAVE_SYSCALL_TRACEPOINTS
  53. select HAVE_UID16
  54. select KTIME_SCALAR
  55. select PERF_USE_VMALLOC
  56. select RTC_LIB
  57. select SYS_SUPPORTS_APM_EMULATION
  58. select HAVE_MOD_ARCH_SPECIFIC if ARM_UNWIND
  59. select MODULES_USE_ELF_REL
  60. select CLONE_BACKWARDS
  61. select OLD_SIGSUSPEND3
  62. select OLD_SIGACTION
  63. select HAVE_CONTEXT_TRACKING
  64. help
  65. The ARM series is a line of low-power-consumption RISC chip designs
  66. licensed by ARM Ltd and targeted at embedded applications and
  67. handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
  68. manufactured, but legacy ARM-based PC hardware remains popular in
  69. Europe. There is an ARM Linux project with a web page at
  70. <http://www.arm.linux.org.uk/>.
  71. config ARM_HAS_SG_CHAIN
  72. bool
  73. config NEED_SG_DMA_LENGTH
  74. bool
  75. config ARM_DMA_USE_IOMMU
  76. bool
  77. select ARM_HAS_SG_CHAIN
  78. select NEED_SG_DMA_LENGTH
  79. if ARM_DMA_USE_IOMMU
  80. config ARM_DMA_IOMMU_ALIGNMENT
  81. int "Maximum PAGE_SIZE order of alignment for DMA IOMMU buffers"
  82. range 4 9
  83. default 8
  84. help
  85. DMA mapping framework by default aligns all buffers to the smallest
  86. PAGE_SIZE order which is greater than or equal to the requested buffer
  87. size. This works well for buffers up to a few hundreds kilobytes, but
  88. for larger buffers it just a waste of address space. Drivers which has
  89. relatively small addressing window (like 64Mib) might run out of
  90. virtual space with just a few allocations.
  91. With this parameter you can specify the maximum PAGE_SIZE order for
  92. DMA IOMMU buffers. Larger buffers will be aligned only to this
  93. specified order. The order is expressed as a power of two multiplied
  94. by the PAGE_SIZE.
  95. endif
  96. config HAVE_PWM
  97. bool
  98. config MIGHT_HAVE_PCI
  99. bool
  100. config SYS_SUPPORTS_APM_EMULATION
  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 ARCH_HAS_BANDGAP
  151. bool
  152. config GENERIC_HWEIGHT
  153. bool
  154. default y
  155. config GENERIC_CALIBRATE_DELAY
  156. bool
  157. default y
  158. config ARCH_MAY_HAVE_PC_FDC
  159. bool
  160. config ZONE_DMA
  161. bool
  162. config NEED_DMA_MAP_STATE
  163. def_bool y
  164. config ARCH_HAS_DMA_SET_COHERENT_MASK
  165. bool
  166. config GENERIC_ISA_DMA
  167. bool
  168. config FIQ
  169. bool
  170. config NEED_RET_TO_USER
  171. bool
  172. config ARCH_MTD_XIP
  173. bool
  174. config VECTORS_BASE
  175. hex
  176. default 0xffff0000 if MMU || CPU_HIGH_VECTOR
  177. default DRAM_BASE if REMAP_VECTORS_TO_RAM
  178. default 0x00000000
  179. help
  180. The base address of exception vectors.
  181. config ARM_PATCH_PHYS_VIRT
  182. bool "Patch physical to virtual translations at runtime" if EMBEDDED
  183. default y
  184. depends on !XIP_KERNEL && MMU
  185. depends on !ARCH_REALVIEW || !SPARSEMEM
  186. help
  187. Patch phys-to-virt and virt-to-phys translation functions at
  188. boot and module load time according to the position of the
  189. kernel in system memory.
  190. This can only be used with non-XIP MMU kernels where the base
  191. of physical memory is at a 16MB boundary.
  192. Only disable this option if you know that you do not require
  193. this feature (eg, building a kernel for a single machine) and
  194. you need to shrink the kernel to the minimal size.
  195. config NEED_MACH_GPIO_H
  196. bool
  197. help
  198. Select this when mach/gpio.h is required to provide special
  199. definitions for this platform. The need for mach/gpio.h should
  200. be avoided when possible.
  201. config NEED_MACH_IO_H
  202. bool
  203. help
  204. Select this when mach/io.h is required to provide special
  205. definitions for this platform. The need for mach/io.h should
  206. be avoided when possible.
  207. config NEED_MACH_MEMORY_H
  208. bool
  209. help
  210. Select this when mach/memory.h is required to provide special
  211. definitions for this platform. The need for mach/memory.h should
  212. be avoided when possible.
  213. config PHYS_OFFSET
  214. hex "Physical address of main memory" if MMU
  215. depends on !ARM_PATCH_PHYS_VIRT && !NEED_MACH_MEMORY_H
  216. default DRAM_BASE if !MMU
  217. help
  218. Please provide the physical address corresponding to the
  219. location of main memory in your system.
  220. config GENERIC_BUG
  221. def_bool y
  222. depends on BUG
  223. source "init/Kconfig"
  224. source "kernel/Kconfig.freezer"
  225. menu "System Type"
  226. config MMU
  227. bool "MMU-based Paged Memory Management Support"
  228. default y
  229. help
  230. Select if you want MMU-based virtualised addressing space
  231. support by paged memory management. If unsure, say 'Y'.
  232. #
  233. # The "ARM system type" choice list is ordered alphabetically by option
  234. # text. Please add new entries in the option alphabetic order.
  235. #
  236. choice
  237. prompt "ARM system type"
  238. default ARCH_VERSATILE if !MMU
  239. default ARCH_MULTIPLATFORM if MMU
  240. config ARCH_MULTIPLATFORM
  241. bool "Allow multiple platforms to be selected"
  242. depends on MMU
  243. select ARM_PATCH_PHYS_VIRT
  244. select AUTO_ZRELADDR
  245. select COMMON_CLK
  246. select MULTI_IRQ_HANDLER
  247. select SPARSE_IRQ
  248. select USE_OF
  249. config ARCH_INTEGRATOR
  250. bool "ARM Ltd. Integrator family"
  251. select ARCH_HAS_CPUFREQ
  252. select ARM_AMBA
  253. select COMMON_CLK
  254. select COMMON_CLK_VERSATILE
  255. select GENERIC_CLOCKEVENTS
  256. select HAVE_TCM
  257. select ICST
  258. select MULTI_IRQ_HANDLER
  259. select NEED_MACH_MEMORY_H
  260. select PLAT_VERSATILE
  261. select SPARSE_IRQ
  262. select VERSATILE_FPGA_IRQ
  263. help
  264. Support for ARM's Integrator platform.
  265. config ARCH_REALVIEW
  266. bool "ARM Ltd. RealView family"
  267. select ARCH_WANT_OPTIONAL_GPIOLIB
  268. select ARM_AMBA
  269. select ARM_TIMER_SP804
  270. select COMMON_CLK
  271. select COMMON_CLK_VERSATILE
  272. select GENERIC_CLOCKEVENTS
  273. select GPIO_PL061 if GPIOLIB
  274. select ICST
  275. select NEED_MACH_MEMORY_H
  276. select PLAT_VERSATILE
  277. select PLAT_VERSATILE_CLCD
  278. help
  279. This enables support for ARM Ltd RealView boards.
  280. config ARCH_VERSATILE
  281. bool "ARM Ltd. Versatile family"
  282. select ARCH_WANT_OPTIONAL_GPIOLIB
  283. select ARM_AMBA
  284. select ARM_TIMER_SP804
  285. select ARM_VIC
  286. select CLKDEV_LOOKUP
  287. select GENERIC_CLOCKEVENTS
  288. select HAVE_MACH_CLKDEV
  289. select ICST
  290. select PLAT_VERSATILE
  291. select PLAT_VERSATILE_CLCD
  292. select PLAT_VERSATILE_CLOCK
  293. select VERSATILE_FPGA_IRQ
  294. help
  295. This enables support for ARM Ltd Versatile board.
  296. config ARCH_AT91
  297. bool "Atmel AT91"
  298. select ARCH_REQUIRE_GPIOLIB
  299. select CLKDEV_LOOKUP
  300. select HAVE_CLK
  301. select IRQ_DOMAIN
  302. select NEED_MACH_GPIO_H
  303. select NEED_MACH_IO_H if PCCARD
  304. select PINCTRL
  305. select PINCTRL_AT91 if USE_OF
  306. help
  307. This enables support for systems based on Atmel
  308. AT91RM9200 and AT91SAM9* processors.
  309. config ARCH_CLPS711X
  310. bool "Cirrus Logic CLPS711x/EP721x/EP731x-based"
  311. select ARCH_REQUIRE_GPIOLIB
  312. select AUTO_ZRELADDR
  313. select CLKDEV_LOOKUP
  314. select COMMON_CLK
  315. select CPU_ARM720T
  316. select GENERIC_CLOCKEVENTS
  317. select MULTI_IRQ_HANDLER
  318. select NEED_MACH_MEMORY_H
  319. select SPARSE_IRQ
  320. help
  321. Support for Cirrus Logic 711x/721x/731x based boards.
  322. config ARCH_GEMINI
  323. bool "Cortina Systems Gemini"
  324. select ARCH_REQUIRE_GPIOLIB
  325. select ARCH_USES_GETTIMEOFFSET
  326. select NEED_MACH_GPIO_H
  327. select CPU_FA526
  328. help
  329. Support for the Cortina Systems Gemini family SoCs
  330. config ARCH_EBSA110
  331. bool "EBSA-110"
  332. select ARCH_USES_GETTIMEOFFSET
  333. select CPU_SA110
  334. select ISA
  335. select NEED_MACH_IO_H
  336. select NEED_MACH_MEMORY_H
  337. select NO_IOPORT
  338. help
  339. This is an evaluation board for the StrongARM processor available
  340. from Digital. It has limited hardware on-board, including an
  341. Ethernet interface, two PCMCIA sockets, two serial ports and a
  342. parallel port.
  343. config ARCH_EP93XX
  344. bool "EP93xx-based"
  345. select ARCH_HAS_HOLES_MEMORYMODEL
  346. select ARCH_REQUIRE_GPIOLIB
  347. select ARCH_USES_GETTIMEOFFSET
  348. select ARM_AMBA
  349. select ARM_VIC
  350. select CLKDEV_LOOKUP
  351. select CPU_ARM920T
  352. select NEED_MACH_MEMORY_H
  353. help
  354. This enables support for the Cirrus EP93xx series of CPUs.
  355. config ARCH_FOOTBRIDGE
  356. bool "FootBridge"
  357. select CPU_SA110
  358. select FOOTBRIDGE
  359. select GENERIC_CLOCKEVENTS
  360. select HAVE_IDE
  361. select NEED_MACH_IO_H if !MMU
  362. select NEED_MACH_MEMORY_H
  363. help
  364. Support for systems based on the DC21285 companion chip
  365. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  366. config ARCH_NETX
  367. bool "Hilscher NetX based"
  368. select ARM_VIC
  369. select CLKSRC_MMIO
  370. select CPU_ARM926T
  371. select GENERIC_CLOCKEVENTS
  372. help
  373. This enables support for systems based on the Hilscher NetX Soc
  374. config ARCH_IOP13XX
  375. bool "IOP13xx-based"
  376. depends on MMU
  377. select ARCH_SUPPORTS_MSI
  378. select CPU_XSC3
  379. select NEED_MACH_MEMORY_H
  380. select NEED_RET_TO_USER
  381. select PCI
  382. select PLAT_IOP
  383. select VMSPLIT_1G
  384. help
  385. Support for Intel's IOP13XX (XScale) family of processors.
  386. config ARCH_IOP32X
  387. bool "IOP32x-based"
  388. depends on MMU
  389. select ARCH_REQUIRE_GPIOLIB
  390. select CPU_XSCALE
  391. select NEED_MACH_GPIO_H
  392. select NEED_RET_TO_USER
  393. select PCI
  394. select PLAT_IOP
  395. help
  396. Support for Intel's 80219 and IOP32X (XScale) family of
  397. processors.
  398. config ARCH_IOP33X
  399. bool "IOP33x-based"
  400. depends on MMU
  401. select ARCH_REQUIRE_GPIOLIB
  402. select CPU_XSCALE
  403. select NEED_MACH_GPIO_H
  404. select NEED_RET_TO_USER
  405. select PCI
  406. select PLAT_IOP
  407. help
  408. Support for Intel's IOP33X (XScale) family of processors.
  409. config ARCH_IXP4XX
  410. bool "IXP4xx-based"
  411. depends on MMU
  412. select ARCH_HAS_DMA_SET_COHERENT_MASK
  413. select ARCH_REQUIRE_GPIOLIB
  414. select CLKSRC_MMIO
  415. select CPU_XSCALE
  416. select DMABOUNCE if PCI
  417. select GENERIC_CLOCKEVENTS
  418. select MIGHT_HAVE_PCI
  419. select NEED_MACH_IO_H
  420. select USB_EHCI_BIG_ENDIAN_MMIO
  421. select USB_EHCI_BIG_ENDIAN_DESC
  422. help
  423. Support for Intel's IXP4XX (XScale) family of processors.
  424. config ARCH_DOVE
  425. bool "Marvell Dove"
  426. select ARCH_REQUIRE_GPIOLIB
  427. select CPU_PJ4
  428. select GENERIC_CLOCKEVENTS
  429. select MIGHT_HAVE_PCI
  430. select PINCTRL
  431. select PINCTRL_DOVE
  432. select PLAT_ORION_LEGACY
  433. select USB_ARCH_HAS_EHCI
  434. select MVEBU_MBUS
  435. help
  436. Support for the Marvell Dove SoC 88AP510
  437. config ARCH_KIRKWOOD
  438. bool "Marvell Kirkwood"
  439. select ARCH_REQUIRE_GPIOLIB
  440. select CPU_FEROCEON
  441. select GENERIC_CLOCKEVENTS
  442. select PCI
  443. select PCI_QUIRKS
  444. select PINCTRL
  445. select PINCTRL_KIRKWOOD
  446. select PLAT_ORION_LEGACY
  447. select MVEBU_MBUS
  448. help
  449. Support for the following Marvell Kirkwood series SoCs:
  450. 88F6180, 88F6192 and 88F6281.
  451. config ARCH_MV78XX0
  452. bool "Marvell MV78xx0"
  453. select ARCH_REQUIRE_GPIOLIB
  454. select CPU_FEROCEON
  455. select GENERIC_CLOCKEVENTS
  456. select PCI
  457. select PLAT_ORION_LEGACY
  458. select MVEBU_MBUS
  459. help
  460. Support for the following Marvell MV78xx0 series SoCs:
  461. MV781x0, MV782x0.
  462. config ARCH_ORION5X
  463. bool "Marvell Orion"
  464. depends on MMU
  465. select ARCH_REQUIRE_GPIOLIB
  466. select CPU_FEROCEON
  467. select GENERIC_CLOCKEVENTS
  468. select PCI
  469. select PLAT_ORION_LEGACY
  470. select MVEBU_MBUS
  471. help
  472. Support for the following Marvell Orion 5x series SoCs:
  473. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  474. Orion-2 (5281), Orion-1-90 (6183).
  475. config ARCH_MMP
  476. bool "Marvell PXA168/910/MMP2"
  477. depends on MMU
  478. select ARCH_REQUIRE_GPIOLIB
  479. select CLKDEV_LOOKUP
  480. select GENERIC_ALLOCATOR
  481. select GENERIC_CLOCKEVENTS
  482. select GPIO_PXA
  483. select IRQ_DOMAIN
  484. select NEED_MACH_GPIO_H
  485. select PINCTRL
  486. select PLAT_PXA
  487. select SPARSE_IRQ
  488. help
  489. Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
  490. config ARCH_KS8695
  491. bool "Micrel/Kendin KS8695"
  492. select ARCH_REQUIRE_GPIOLIB
  493. select CLKSRC_MMIO
  494. select CPU_ARM922T
  495. select GENERIC_CLOCKEVENTS
  496. select NEED_MACH_MEMORY_H
  497. help
  498. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  499. System-on-Chip devices.
  500. config ARCH_W90X900
  501. bool "Nuvoton W90X900 CPU"
  502. select ARCH_REQUIRE_GPIOLIB
  503. select CLKDEV_LOOKUP
  504. select CLKSRC_MMIO
  505. select CPU_ARM926T
  506. select GENERIC_CLOCKEVENTS
  507. help
  508. Support for Nuvoton (Winbond logic dept.) ARM9 processor,
  509. At present, the w90x900 has been renamed nuc900, regarding
  510. the ARM series product line, you can login the following
  511. link address to know more.
  512. <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
  513. ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
  514. config ARCH_LPC32XX
  515. bool "NXP LPC32XX"
  516. select ARCH_REQUIRE_GPIOLIB
  517. select ARM_AMBA
  518. select CLKDEV_LOOKUP
  519. select CLKSRC_MMIO
  520. select CPU_ARM926T
  521. select GENERIC_CLOCKEVENTS
  522. select HAVE_IDE
  523. select HAVE_PWM
  524. select USB_ARCH_HAS_OHCI
  525. select USE_OF
  526. help
  527. Support for the NXP LPC32XX family of processors
  528. config ARCH_PXA
  529. bool "PXA2xx/PXA3xx-based"
  530. depends on MMU
  531. select ARCH_HAS_CPUFREQ
  532. select ARCH_MTD_XIP
  533. select ARCH_REQUIRE_GPIOLIB
  534. select ARM_CPU_SUSPEND if PM
  535. select AUTO_ZRELADDR
  536. select CLKDEV_LOOKUP
  537. select CLKSRC_MMIO
  538. select GENERIC_CLOCKEVENTS
  539. select GPIO_PXA
  540. select HAVE_IDE
  541. select MULTI_IRQ_HANDLER
  542. select NEED_MACH_GPIO_H
  543. select PLAT_PXA
  544. select SPARSE_IRQ
  545. help
  546. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  547. config ARCH_MSM
  548. bool "Qualcomm MSM"
  549. select ARCH_REQUIRE_GPIOLIB
  550. select CLKDEV_LOOKUP
  551. select GENERIC_CLOCKEVENTS
  552. select HAVE_CLK
  553. help
  554. Support for Qualcomm MSM/QSD based systems. This runs on the
  555. apps processor of the MSM/QSD and depends on a shared memory
  556. interface to the modem processor which runs the baseband
  557. stack and controls some vital subsystems
  558. (clock and power control, etc).
  559. config ARCH_SHMOBILE
  560. bool "Renesas SH-Mobile / R-Mobile"
  561. select CLKDEV_LOOKUP
  562. select GENERIC_CLOCKEVENTS
  563. select HAVE_ARM_SCU if SMP
  564. select HAVE_ARM_TWD if LOCAL_TIMERS
  565. select HAVE_CLK
  566. select HAVE_MACH_CLKDEV
  567. select HAVE_SMP
  568. select MIGHT_HAVE_CACHE_L2X0
  569. select MULTI_IRQ_HANDLER
  570. select NEED_MACH_MEMORY_H
  571. select NO_IOPORT
  572. select PINCTRL if ARCH_WANT_OPTIONAL_GPIOLIB
  573. select PM_GENERIC_DOMAINS if PM
  574. select SPARSE_IRQ
  575. help
  576. Support for Renesas's SH-Mobile and R-Mobile ARM platforms.
  577. config ARCH_RPC
  578. bool "RiscPC"
  579. select ARCH_ACORN
  580. select ARCH_MAY_HAVE_PC_FDC
  581. select ARCH_SPARSEMEM_ENABLE
  582. select ARCH_USES_GETTIMEOFFSET
  583. select FIQ
  584. select HAVE_IDE
  585. select HAVE_PATA_PLATFORM
  586. select ISA_DMA_API
  587. select NEED_MACH_IO_H
  588. select NEED_MACH_MEMORY_H
  589. select NO_IOPORT
  590. select VIRT_TO_BUS
  591. help
  592. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  593. CD-ROM interface, serial and parallel port, and the floppy drive.
  594. config ARCH_SA1100
  595. bool "SA1100-based"
  596. select ARCH_HAS_CPUFREQ
  597. select ARCH_MTD_XIP
  598. select ARCH_REQUIRE_GPIOLIB
  599. select ARCH_SPARSEMEM_ENABLE
  600. select CLKDEV_LOOKUP
  601. select CLKSRC_MMIO
  602. select CPU_FREQ
  603. select CPU_SA1100
  604. select GENERIC_CLOCKEVENTS
  605. select HAVE_IDE
  606. select ISA
  607. select NEED_MACH_GPIO_H
  608. select NEED_MACH_MEMORY_H
  609. select SPARSE_IRQ
  610. help
  611. Support for StrongARM 11x0 based boards.
  612. config ARCH_S3C24XX
  613. bool "Samsung S3C24XX SoCs"
  614. select ARCH_HAS_CPUFREQ
  615. select ARCH_REQUIRE_GPIOLIB
  616. select CLKDEV_LOOKUP
  617. select CLKSRC_MMIO
  618. select GENERIC_CLOCKEVENTS
  619. select HAVE_CLK
  620. select HAVE_S3C2410_I2C if I2C
  621. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  622. select HAVE_S3C_RTC if RTC_CLASS
  623. select MULTI_IRQ_HANDLER
  624. select NEED_MACH_GPIO_H
  625. select NEED_MACH_IO_H
  626. help
  627. Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443
  628. and S3C2450 SoCs based systems, such as the Simtec Electronics BAST
  629. (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or the
  630. Samsung SMDK2410 development board (and derivatives).
  631. config ARCH_S3C64XX
  632. bool "Samsung S3C64XX"
  633. select ARCH_HAS_CPUFREQ
  634. select ARCH_REQUIRE_GPIOLIB
  635. select ARM_VIC
  636. select CLKDEV_LOOKUP
  637. select CLKSRC_MMIO
  638. select CPU_V6
  639. select GENERIC_CLOCKEVENTS
  640. select HAVE_CLK
  641. select HAVE_S3C2410_I2C if I2C
  642. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  643. select HAVE_TCM
  644. select NEED_MACH_GPIO_H
  645. select NO_IOPORT
  646. select PLAT_SAMSUNG
  647. select S3C_DEV_NAND
  648. select S3C_GPIO_TRACK
  649. select SAMSUNG_CLKSRC
  650. select SAMSUNG_GPIOLIB_4BIT
  651. select SAMSUNG_IRQ_VIC_TIMER
  652. select USB_ARCH_HAS_OHCI
  653. help
  654. Samsung S3C64XX series based systems
  655. config ARCH_S5P64X0
  656. bool "Samsung S5P6440 S5P6450"
  657. select CLKDEV_LOOKUP
  658. select CLKSRC_MMIO
  659. select CPU_V6
  660. select GENERIC_CLOCKEVENTS
  661. select HAVE_CLK
  662. select HAVE_S3C2410_I2C if I2C
  663. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  664. select HAVE_S3C_RTC if RTC_CLASS
  665. select NEED_MACH_GPIO_H
  666. help
  667. Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
  668. SMDK6450.
  669. config ARCH_S5PC100
  670. bool "Samsung S5PC100"
  671. select ARCH_REQUIRE_GPIOLIB
  672. select CLKDEV_LOOKUP
  673. select CLKSRC_MMIO
  674. select CPU_V7
  675. select GENERIC_CLOCKEVENTS
  676. select HAVE_CLK
  677. select HAVE_S3C2410_I2C if I2C
  678. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  679. select HAVE_S3C_RTC if RTC_CLASS
  680. select NEED_MACH_GPIO_H
  681. help
  682. Samsung S5PC100 series based systems
  683. config ARCH_S5PV210
  684. bool "Samsung S5PV210/S5PC110"
  685. select ARCH_HAS_CPUFREQ
  686. select ARCH_HAS_HOLES_MEMORYMODEL
  687. select ARCH_SPARSEMEM_ENABLE
  688. select CLKDEV_LOOKUP
  689. select CLKSRC_MMIO
  690. select CPU_V7
  691. select GENERIC_CLOCKEVENTS
  692. select HAVE_CLK
  693. select HAVE_S3C2410_I2C if I2C
  694. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  695. select HAVE_S3C_RTC if RTC_CLASS
  696. select NEED_MACH_GPIO_H
  697. select NEED_MACH_MEMORY_H
  698. help
  699. Samsung S5PV210/S5PC110 series based systems
  700. config ARCH_EXYNOS
  701. bool "Samsung EXYNOS"
  702. select ARCH_HAS_CPUFREQ
  703. select ARCH_HAS_HOLES_MEMORYMODEL
  704. select ARCH_SPARSEMEM_ENABLE
  705. select CLKDEV_LOOKUP
  706. select COMMON_CLK
  707. select CPU_V7
  708. select GENERIC_CLOCKEVENTS
  709. select HAVE_CLK
  710. select HAVE_S3C2410_I2C if I2C
  711. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  712. select HAVE_S3C_RTC if RTC_CLASS
  713. select NEED_MACH_GPIO_H
  714. select NEED_MACH_MEMORY_H
  715. help
  716. Support for SAMSUNG's EXYNOS SoCs (EXYNOS4/5)
  717. config ARCH_SHARK
  718. bool "Shark"
  719. select ARCH_USES_GETTIMEOFFSET
  720. select CPU_SA110
  721. select ISA
  722. select ISA_DMA
  723. select NEED_MACH_MEMORY_H
  724. select PCI
  725. select VIRT_TO_BUS
  726. select ZONE_DMA
  727. help
  728. Support for the StrongARM based Digital DNARD machine, also known
  729. as "Shark" (<http://www.shark-linux.de/shark.html>).
  730. config ARCH_U300
  731. bool "ST-Ericsson U300 Series"
  732. depends on MMU
  733. select ARCH_REQUIRE_GPIOLIB
  734. select ARM_AMBA
  735. select ARM_PATCH_PHYS_VIRT
  736. select ARM_VIC
  737. select CLKDEV_LOOKUP
  738. select CLKSRC_MMIO
  739. select COMMON_CLK
  740. select CPU_ARM926T
  741. select GENERIC_CLOCKEVENTS
  742. select HAVE_TCM
  743. select SPARSE_IRQ
  744. help
  745. Support for ST-Ericsson U300 series mobile platforms.
  746. config ARCH_DAVINCI
  747. bool "TI DaVinci"
  748. select ARCH_HAS_HOLES_MEMORYMODEL
  749. select ARCH_REQUIRE_GPIOLIB
  750. select CLKDEV_LOOKUP
  751. select GENERIC_ALLOCATOR
  752. select GENERIC_CLOCKEVENTS
  753. select GENERIC_IRQ_CHIP
  754. select HAVE_IDE
  755. select NEED_MACH_GPIO_H
  756. select USE_OF
  757. select ZONE_DMA
  758. help
  759. Support for TI's DaVinci platform.
  760. config ARCH_OMAP1
  761. bool "TI OMAP1"
  762. depends on MMU
  763. select ARCH_HAS_CPUFREQ
  764. select ARCH_HAS_HOLES_MEMORYMODEL
  765. select ARCH_OMAP
  766. select ARCH_REQUIRE_GPIOLIB
  767. select CLKDEV_LOOKUP
  768. select CLKSRC_MMIO
  769. select GENERIC_CLOCKEVENTS
  770. select GENERIC_IRQ_CHIP
  771. select HAVE_CLK
  772. select HAVE_IDE
  773. select IRQ_DOMAIN
  774. select NEED_MACH_IO_H if PCCARD
  775. select NEED_MACH_MEMORY_H
  776. help
  777. Support for older TI OMAP1 (omap7xx, omap15xx or omap16xx)
  778. endchoice
  779. menu "Multiple platform selection"
  780. depends on ARCH_MULTIPLATFORM
  781. comment "CPU Core family selection"
  782. config ARCH_MULTI_V4
  783. bool "ARMv4 based platforms (FA526, StrongARM)"
  784. depends on !ARCH_MULTI_V6_V7
  785. select ARCH_MULTI_V4_V5
  786. config ARCH_MULTI_V4T
  787. bool "ARMv4T based platforms (ARM720T, ARM920T, ...)"
  788. depends on !ARCH_MULTI_V6_V7
  789. select ARCH_MULTI_V4_V5
  790. config ARCH_MULTI_V5
  791. bool "ARMv5 based platforms (ARM926T, XSCALE, PJ1, ...)"
  792. depends on !ARCH_MULTI_V6_V7
  793. select ARCH_MULTI_V4_V5
  794. config ARCH_MULTI_V4_V5
  795. bool
  796. config ARCH_MULTI_V6
  797. bool "ARMv6 based platforms (ARM11)"
  798. select ARCH_MULTI_V6_V7
  799. select CPU_V6
  800. config ARCH_MULTI_V7
  801. bool "ARMv7 based platforms (Cortex-A, PJ4, Scorpion, Krait)"
  802. default y
  803. select ARCH_MULTI_V6_V7
  804. select CPU_V7
  805. config ARCH_MULTI_V6_V7
  806. bool
  807. config ARCH_MULTI_CPU_AUTO
  808. def_bool !(ARCH_MULTI_V4 || ARCH_MULTI_V4T || ARCH_MULTI_V6_V7)
  809. select ARCH_MULTI_V5
  810. endmenu
  811. #
  812. # This is sorted alphabetically by mach-* pathname. However, plat-*
  813. # Kconfigs may be included either alphabetically (according to the
  814. # plat- suffix) or along side the corresponding mach-* source.
  815. #
  816. source "arch/arm/mach-mvebu/Kconfig"
  817. source "arch/arm/mach-at91/Kconfig"
  818. source "arch/arm/mach-bcm/Kconfig"
  819. source "arch/arm/mach-bcm2835/Kconfig"
  820. source "arch/arm/mach-clps711x/Kconfig"
  821. source "arch/arm/mach-cns3xxx/Kconfig"
  822. source "arch/arm/mach-davinci/Kconfig"
  823. source "arch/arm/mach-dove/Kconfig"
  824. source "arch/arm/mach-ep93xx/Kconfig"
  825. source "arch/arm/mach-footbridge/Kconfig"
  826. source "arch/arm/mach-gemini/Kconfig"
  827. source "arch/arm/mach-highbank/Kconfig"
  828. source "arch/arm/mach-integrator/Kconfig"
  829. source "arch/arm/mach-iop32x/Kconfig"
  830. source "arch/arm/mach-iop33x/Kconfig"
  831. source "arch/arm/mach-iop13xx/Kconfig"
  832. source "arch/arm/mach-ixp4xx/Kconfig"
  833. source "arch/arm/mach-kirkwood/Kconfig"
  834. source "arch/arm/mach-ks8695/Kconfig"
  835. source "arch/arm/mach-msm/Kconfig"
  836. source "arch/arm/mach-mv78xx0/Kconfig"
  837. source "arch/arm/mach-imx/Kconfig"
  838. source "arch/arm/mach-mxs/Kconfig"
  839. source "arch/arm/mach-netx/Kconfig"
  840. source "arch/arm/mach-nomadik/Kconfig"
  841. source "arch/arm/plat-omap/Kconfig"
  842. source "arch/arm/mach-omap1/Kconfig"
  843. source "arch/arm/mach-omap2/Kconfig"
  844. source "arch/arm/mach-orion5x/Kconfig"
  845. source "arch/arm/mach-picoxcell/Kconfig"
  846. source "arch/arm/mach-pxa/Kconfig"
  847. source "arch/arm/plat-pxa/Kconfig"
  848. source "arch/arm/mach-mmp/Kconfig"
  849. source "arch/arm/mach-realview/Kconfig"
  850. source "arch/arm/mach-sa1100/Kconfig"
  851. source "arch/arm/plat-samsung/Kconfig"
  852. source "arch/arm/mach-socfpga/Kconfig"
  853. source "arch/arm/mach-spear/Kconfig"
  854. source "arch/arm/mach-s3c24xx/Kconfig"
  855. if ARCH_S3C64XX
  856. source "arch/arm/mach-s3c64xx/Kconfig"
  857. endif
  858. source "arch/arm/mach-s5p64x0/Kconfig"
  859. source "arch/arm/mach-s5pc100/Kconfig"
  860. source "arch/arm/mach-s5pv210/Kconfig"
  861. source "arch/arm/mach-exynos/Kconfig"
  862. source "arch/arm/mach-shmobile/Kconfig"
  863. source "arch/arm/mach-sunxi/Kconfig"
  864. source "arch/arm/mach-prima2/Kconfig"
  865. source "arch/arm/mach-tegra/Kconfig"
  866. source "arch/arm/mach-u300/Kconfig"
  867. source "arch/arm/mach-ux500/Kconfig"
  868. source "arch/arm/mach-versatile/Kconfig"
  869. source "arch/arm/mach-vexpress/Kconfig"
  870. source "arch/arm/plat-versatile/Kconfig"
  871. source "arch/arm/mach-virt/Kconfig"
  872. source "arch/arm/mach-vt8500/Kconfig"
  873. source "arch/arm/mach-w90x900/Kconfig"
  874. source "arch/arm/mach-zynq/Kconfig"
  875. # Definitions to make life easier
  876. config ARCH_ACORN
  877. bool
  878. config PLAT_IOP
  879. bool
  880. select GENERIC_CLOCKEVENTS
  881. config PLAT_ORION
  882. bool
  883. select CLKSRC_MMIO
  884. select COMMON_CLK
  885. select GENERIC_IRQ_CHIP
  886. select IRQ_DOMAIN
  887. config PLAT_ORION_LEGACY
  888. bool
  889. select PLAT_ORION
  890. config PLAT_PXA
  891. bool
  892. config PLAT_VERSATILE
  893. bool
  894. config ARM_TIMER_SP804
  895. bool
  896. select CLKSRC_MMIO
  897. select CLKSRC_OF if OF
  898. source arch/arm/mm/Kconfig
  899. config ARM_NR_BANKS
  900. int
  901. default 16 if ARCH_EP93XX
  902. default 8
  903. config IWMMXT
  904. bool "Enable iWMMXt support" if !CPU_PJ4
  905. depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
  906. default y if PXA27x || PXA3xx || ARCH_MMP || CPU_PJ4
  907. help
  908. Enable support for iWMMXt context switching at run time if
  909. running on a CPU that supports it.
  910. config XSCALE_PMU
  911. bool
  912. depends on CPU_XSCALE
  913. default y
  914. config MULTI_IRQ_HANDLER
  915. bool
  916. help
  917. Allow each machine to specify it's own IRQ handler at run time.
  918. if !MMU
  919. source "arch/arm/Kconfig-nommu"
  920. endif
  921. config PJ4B_ERRATA_4742
  922. bool "PJ4B Errata 4742: IDLE Wake Up Commands can Cause the CPU Core to Cease Operation"
  923. depends on CPU_PJ4B && MACH_ARMADA_370
  924. default y
  925. help
  926. When coming out of either a Wait for Interrupt (WFI) or a Wait for
  927. Event (WFE) IDLE states, a specific timing sensitivity exists between
  928. the retiring WFI/WFE instructions and the newly issued subsequent
  929. instructions. This sensitivity can result in a CPU hang scenario.
  930. Workaround:
  931. The software must insert either a Data Synchronization Barrier (DSB)
  932. or Data Memory Barrier (DMB) command immediately after the WFI/WFE
  933. instruction
  934. config ARM_ERRATA_326103
  935. bool "ARM errata: FSR write bit incorrect on a SWP to read-only memory"
  936. depends on CPU_V6
  937. help
  938. Executing a SWP instruction to read-only memory does not set bit 11
  939. of the FSR on the ARM 1136 prior to r1p0. This causes the kernel to
  940. treat the access as a read, preventing a COW from occurring and
  941. causing the faulting task to livelock.
  942. config ARM_ERRATA_411920
  943. bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
  944. depends on CPU_V6 || CPU_V6K
  945. help
  946. Invalidation of the Instruction Cache operation can
  947. fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
  948. It does not affect the MPCore. This option enables the ARM Ltd.
  949. recommended workaround.
  950. config ARM_ERRATA_430973
  951. bool "ARM errata: Stale prediction on replaced interworking branch"
  952. depends on CPU_V7
  953. help
  954. This option enables the workaround for the 430973 Cortex-A8
  955. (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
  956. interworking branch is replaced with another code sequence at the
  957. same virtual address, whether due to self-modifying code or virtual
  958. to physical address re-mapping, Cortex-A8 does not recover from the
  959. stale interworking branch prediction. This results in Cortex-A8
  960. executing the new code sequence in the incorrect ARM or Thumb state.
  961. The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
  962. and also flushes the branch target cache at every context switch.
  963. Note that setting specific bits in the ACTLR register may not be
  964. available in non-secure mode.
  965. config ARM_ERRATA_458693
  966. bool "ARM errata: Processor deadlock when a false hazard is created"
  967. depends on CPU_V7
  968. depends on !ARCH_MULTIPLATFORM
  969. help
  970. This option enables the workaround for the 458693 Cortex-A8 (r2p0)
  971. erratum. For very specific sequences of memory operations, it is
  972. possible for a hazard condition intended for a cache line to instead
  973. be incorrectly associated with a different cache line. This false
  974. hazard might then cause a processor deadlock. The workaround enables
  975. the L1 caching of the NEON accesses and disables the PLD instruction
  976. in the ACTLR register. Note that setting specific bits in the ACTLR
  977. register may not be available in non-secure mode.
  978. config ARM_ERRATA_460075
  979. bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
  980. depends on CPU_V7
  981. depends on !ARCH_MULTIPLATFORM
  982. help
  983. This option enables the workaround for the 460075 Cortex-A8 (r2p0)
  984. erratum. Any asynchronous access to the L2 cache may encounter a
  985. situation in which recent store transactions to the L2 cache are lost
  986. and overwritten with stale memory contents from external memory. The
  987. workaround disables the write-allocate mode for the L2 cache via the
  988. ACTLR register. Note that setting specific bits in the ACTLR register
  989. may not be available in non-secure mode.
  990. config ARM_ERRATA_742230
  991. bool "ARM errata: DMB operation may be faulty"
  992. depends on CPU_V7 && SMP
  993. depends on !ARCH_MULTIPLATFORM
  994. help
  995. This option enables the workaround for the 742230 Cortex-A9
  996. (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
  997. between two write operations may not ensure the correct visibility
  998. ordering of the two writes. This workaround sets a specific bit in
  999. the diagnostic register of the Cortex-A9 which causes the DMB
  1000. instruction to behave as a DSB, ensuring the correct behaviour of
  1001. the two writes.
  1002. config ARM_ERRATA_742231
  1003. bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
  1004. depends on CPU_V7 && SMP
  1005. depends on !ARCH_MULTIPLATFORM
  1006. help
  1007. This option enables the workaround for the 742231 Cortex-A9
  1008. (r2p0..r2p2) erratum. Under certain conditions, specific to the
  1009. Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
  1010. accessing some data located in the same cache line, may get corrupted
  1011. data due to bad handling of the address hazard when the line gets
  1012. replaced from one of the CPUs at the same time as another CPU is
  1013. accessing it. This workaround sets specific bits in the diagnostic
  1014. register of the Cortex-A9 which reduces the linefill issuing
  1015. capabilities of the processor.
  1016. config PL310_ERRATA_588369
  1017. bool "PL310 errata: Clean & Invalidate maintenance operations do not invalidate clean lines"
  1018. depends on CACHE_L2X0
  1019. help
  1020. The PL310 L2 cache controller implements three types of Clean &
  1021. Invalidate maintenance operations: by Physical Address
  1022. (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
  1023. They are architecturally defined to behave as the execution of a
  1024. clean operation followed immediately by an invalidate operation,
  1025. both performing to the same memory location. This functionality
  1026. is not correctly implemented in PL310 as clean lines are not
  1027. invalidated as a result of these operations.
  1028. config ARM_ERRATA_643719
  1029. bool "ARM errata: LoUIS bit field in CLIDR register is incorrect"
  1030. depends on CPU_V7 && SMP
  1031. help
  1032. This option enables the workaround for the 643719 Cortex-A9 (prior to
  1033. r1p0) erratum. On affected cores the LoUIS bit field of the CLIDR
  1034. register returns zero when it should return one. The workaround
  1035. corrects this value, ensuring cache maintenance operations which use
  1036. it behave as intended and avoiding data corruption.
  1037. config ARM_ERRATA_720789
  1038. bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
  1039. depends on CPU_V7
  1040. help
  1041. This option enables the workaround for the 720789 Cortex-A9 (prior to
  1042. r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
  1043. broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
  1044. As a consequence of this erratum, some TLB entries which should be
  1045. invalidated are not, resulting in an incoherency in the system page
  1046. tables. The workaround changes the TLB flushing routines to invalidate
  1047. entries regardless of the ASID.
  1048. config PL310_ERRATA_727915
  1049. bool "PL310 errata: Background Clean & Invalidate by Way operation can cause data corruption"
  1050. depends on CACHE_L2X0
  1051. help
  1052. PL310 implements the Clean & Invalidate by Way L2 cache maintenance
  1053. operation (offset 0x7FC). This operation runs in background so that
  1054. PL310 can handle normal accesses while it is in progress. Under very
  1055. rare circumstances, due to this erratum, write data can be lost when
  1056. PL310 treats a cacheable write transaction during a Clean &
  1057. Invalidate by Way operation.
  1058. config ARM_ERRATA_743622
  1059. bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
  1060. depends on CPU_V7
  1061. depends on !ARCH_MULTIPLATFORM
  1062. help
  1063. This option enables the workaround for the 743622 Cortex-A9
  1064. (r2p*) erratum. Under very rare conditions, a faulty
  1065. optimisation in the Cortex-A9 Store Buffer may lead to data
  1066. corruption. This workaround sets a specific bit in the diagnostic
  1067. register of the Cortex-A9 which disables the Store Buffer
  1068. optimisation, preventing the defect from occurring. This has no
  1069. visible impact on the overall performance or power consumption of the
  1070. processor.
  1071. config ARM_ERRATA_751472
  1072. bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
  1073. depends on CPU_V7
  1074. depends on !ARCH_MULTIPLATFORM
  1075. help
  1076. This option enables the workaround for the 751472 Cortex-A9 (prior
  1077. to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
  1078. completion of a following broadcasted operation if the second
  1079. operation is received by a CPU before the ICIALLUIS has completed,
  1080. potentially leading to corrupted entries in the cache or TLB.
  1081. config PL310_ERRATA_753970
  1082. bool "PL310 errata: cache sync operation may be faulty"
  1083. depends on CACHE_PL310
  1084. help
  1085. This option enables the workaround for the 753970 PL310 (r3p0) erratum.
  1086. Under some condition the effect of cache sync operation on
  1087. the store buffer still remains when the operation completes.
  1088. This means that the store buffer is always asked to drain and
  1089. this prevents it from merging any further writes. The workaround
  1090. is to replace the normal offset of cache sync operation (0x730)
  1091. by another offset targeting an unmapped PL310 register 0x740.
  1092. This has the same effect as the cache sync operation: store buffer
  1093. drain and waiting for all buffers empty.
  1094. config ARM_ERRATA_754322
  1095. bool "ARM errata: possible faulty MMU translations following an ASID switch"
  1096. depends on CPU_V7
  1097. help
  1098. This option enables the workaround for the 754322 Cortex-A9 (r2p*,
  1099. r3p*) erratum. A speculative memory access may cause a page table walk
  1100. which starts prior to an ASID switch but completes afterwards. This
  1101. can populate the micro-TLB with a stale entry which may be hit with
  1102. the new ASID. This workaround places two dsb instructions in the mm
  1103. switching code so that no page table walks can cross the ASID switch.
  1104. config ARM_ERRATA_754327
  1105. bool "ARM errata: no automatic Store Buffer drain"
  1106. depends on CPU_V7 && SMP
  1107. help
  1108. This option enables the workaround for the 754327 Cortex-A9 (prior to
  1109. r2p0) erratum. The Store Buffer does not have any automatic draining
  1110. mechanism and therefore a livelock may occur if an external agent
  1111. continuously polls a memory location waiting to observe an update.
  1112. This workaround defines cpu_relax() as smp_mb(), preventing correctly
  1113. written polling loops from denying visibility of updates to memory.
  1114. config ARM_ERRATA_364296
  1115. bool "ARM errata: Possible cache data corruption with hit-under-miss enabled"
  1116. depends on CPU_V6 && !SMP
  1117. help
  1118. This options enables the workaround for the 364296 ARM1136
  1119. r0p2 erratum (possible cache data corruption with
  1120. hit-under-miss enabled). It sets the undocumented bit 31 in
  1121. the auxiliary control register and the FI bit in the control
  1122. register, thus disabling hit-under-miss without putting the
  1123. processor into full low interrupt latency mode. ARM11MPCore
  1124. is not affected.
  1125. config ARM_ERRATA_764369
  1126. bool "ARM errata: Data cache line maintenance operation by MVA may not succeed"
  1127. depends on CPU_V7 && SMP
  1128. help
  1129. This option enables the workaround for erratum 764369
  1130. affecting Cortex-A9 MPCore with two or more processors (all
  1131. current revisions). Under certain timing circumstances, a data
  1132. cache line maintenance operation by MVA targeting an Inner
  1133. Shareable memory region may fail to proceed up to either the
  1134. Point of Coherency or to the Point of Unification of the
  1135. system. This workaround adds a DSB instruction before the
  1136. relevant cache maintenance functions and sets a specific bit
  1137. in the diagnostic control register of the SCU.
  1138. config PL310_ERRATA_769419
  1139. bool "PL310 errata: no automatic Store Buffer drain"
  1140. depends on CACHE_L2X0
  1141. help
  1142. On revisions of the PL310 prior to r3p2, the Store Buffer does
  1143. not automatically drain. This can cause normal, non-cacheable
  1144. writes to be retained when the memory system is idle, leading
  1145. to suboptimal I/O performance for drivers using coherent DMA.
  1146. This option adds a write barrier to the cpu_idle loop so that,
  1147. on systems with an outer cache, the store buffer is drained
  1148. explicitly.
  1149. config ARM_ERRATA_775420
  1150. bool "ARM errata: A data cache maintenance operation which aborts, might lead to deadlock"
  1151. depends on CPU_V7
  1152. help
  1153. This option enables the workaround for the 775420 Cortex-A9 (r2p2,
  1154. r2p6,r2p8,r2p10,r3p0) erratum. In case a date cache maintenance
  1155. operation aborts with MMU exception, it might cause the processor
  1156. to deadlock. This workaround puts DSB before executing ISB if
  1157. an abort may occur on cache maintenance.
  1158. config ARM_ERRATA_798181
  1159. bool "ARM errata: TLBI/DSB failure on Cortex-A15"
  1160. depends on CPU_V7 && SMP
  1161. help
  1162. On Cortex-A15 (r0p0..r3p2) the TLBI*IS/DSB operations are not
  1163. adequately shooting down all use of the old entries. This
  1164. option enables the Linux kernel workaround for this erratum
  1165. which sends an IPI to the CPUs that are running the same ASID
  1166. as the one being invalidated.
  1167. endmenu
  1168. source "arch/arm/common/Kconfig"
  1169. menu "Bus support"
  1170. config ARM_AMBA
  1171. bool
  1172. config ISA
  1173. bool
  1174. help
  1175. Find out whether you have ISA slots on your motherboard. ISA is the
  1176. name of a bus system, i.e. the way the CPU talks to the other stuff
  1177. inside your box. Other bus systems are PCI, EISA, MicroChannel
  1178. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  1179. newer boards don't support it. If you have ISA, say Y, otherwise N.
  1180. # Select ISA DMA controller support
  1181. config ISA_DMA
  1182. bool
  1183. select ISA_DMA_API
  1184. # Select ISA DMA interface
  1185. config ISA_DMA_API
  1186. bool
  1187. config PCI
  1188. bool "PCI support" if MIGHT_HAVE_PCI
  1189. help
  1190. Find out whether you have a PCI motherboard. PCI is the name of a
  1191. bus system, i.e. the way the CPU talks to the other stuff inside
  1192. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  1193. VESA. If you have PCI, say Y, otherwise N.
  1194. config PCI_DOMAINS
  1195. bool
  1196. depends on PCI
  1197. config PCI_NANOENGINE
  1198. bool "BSE nanoEngine PCI support"
  1199. depends on SA1100_NANOENGINE
  1200. help
  1201. Enable PCI on the BSE nanoEngine board.
  1202. config PCI_SYSCALL
  1203. def_bool PCI
  1204. # Select the host bridge type
  1205. config PCI_HOST_VIA82C505
  1206. bool
  1207. depends on PCI && ARCH_SHARK
  1208. default y
  1209. config PCI_HOST_ITE8152
  1210. bool
  1211. depends on PCI && MACH_ARMCORE
  1212. default y
  1213. select DMABOUNCE
  1214. source "drivers/pci/Kconfig"
  1215. source "drivers/pcmcia/Kconfig"
  1216. endmenu
  1217. menu "Kernel Features"
  1218. config HAVE_SMP
  1219. bool
  1220. help
  1221. This option should be selected by machines which have an SMP-
  1222. capable CPU.
  1223. The only effect of this option is to make the SMP-related
  1224. options available to the user for configuration.
  1225. config SMP
  1226. bool "Symmetric Multi-Processing"
  1227. depends on CPU_V6K || CPU_V7
  1228. depends on GENERIC_CLOCKEVENTS
  1229. depends on HAVE_SMP
  1230. depends on MMU
  1231. select USE_GENERIC_SMP_HELPERS
  1232. help
  1233. This enables support for systems with more than one CPU. If you have
  1234. a system with only one CPU, like most personal computers, say N. If
  1235. you have a system with more than one CPU, say Y.
  1236. If you say N here, the kernel will run on single and multiprocessor
  1237. machines, but will use only one CPU of a multiprocessor machine. If
  1238. you say Y here, the kernel will run on many, but not all, single
  1239. processor machines. On a single processor machine, the kernel will
  1240. run faster if you say N here.
  1241. See also <file:Documentation/x86/i386/IO-APIC.txt>,
  1242. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  1243. <http://tldp.org/HOWTO/SMP-HOWTO.html>.
  1244. If you don't know what to do here, say N.
  1245. config SMP_ON_UP
  1246. bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
  1247. depends on SMP && !XIP_KERNEL
  1248. default y
  1249. help
  1250. SMP kernels contain instructions which fail on non-SMP processors.
  1251. Enabling this option allows the kernel to modify itself to make
  1252. these instructions safe. Disabling it allows about 1K of space
  1253. savings.
  1254. If you don't know what to do here, say Y.
  1255. config ARM_CPU_TOPOLOGY
  1256. bool "Support cpu topology definition"
  1257. depends on SMP && CPU_V7
  1258. default y
  1259. help
  1260. Support ARM cpu topology definition. The MPIDR register defines
  1261. affinity between processors which is then used to describe the cpu
  1262. topology of an ARM System.
  1263. config SCHED_MC
  1264. bool "Multi-core scheduler support"
  1265. depends on ARM_CPU_TOPOLOGY
  1266. help
  1267. Multi-core scheduler support improves the CPU scheduler's decision
  1268. making when dealing with multi-core CPU chips at a cost of slightly
  1269. increased overhead in some places. If unsure say N here.
  1270. config SCHED_SMT
  1271. bool "SMT scheduler support"
  1272. depends on ARM_CPU_TOPOLOGY
  1273. help
  1274. Improves the CPU scheduler's decision making when dealing with
  1275. MultiThreading at a cost of slightly increased overhead in some
  1276. places. If unsure say N here.
  1277. config HAVE_ARM_SCU
  1278. bool
  1279. help
  1280. This option enables support for the ARM system coherency unit
  1281. config HAVE_ARM_ARCH_TIMER
  1282. bool "Architected timer support"
  1283. depends on CPU_V7
  1284. select ARM_ARCH_TIMER
  1285. help
  1286. This option enables support for the ARM architected timer
  1287. config HAVE_ARM_TWD
  1288. bool
  1289. depends on SMP
  1290. select CLKSRC_OF if OF
  1291. help
  1292. This options enables support for the ARM timer and watchdog unit
  1293. config MCPM
  1294. bool "Multi-Cluster Power Management"
  1295. depends on CPU_V7 && SMP
  1296. help
  1297. This option provides the common power management infrastructure
  1298. for (multi-)cluster based systems, such as big.LITTLE based
  1299. systems.
  1300. choice
  1301. prompt "Memory split"
  1302. default VMSPLIT_3G
  1303. help
  1304. Select the desired split between kernel and user memory.
  1305. If you are not absolutely sure what you are doing, leave this
  1306. option alone!
  1307. config VMSPLIT_3G
  1308. bool "3G/1G user/kernel split"
  1309. config VMSPLIT_2G
  1310. bool "2G/2G user/kernel split"
  1311. config VMSPLIT_1G
  1312. bool "1G/3G user/kernel split"
  1313. endchoice
  1314. config PAGE_OFFSET
  1315. hex
  1316. default 0x40000000 if VMSPLIT_1G
  1317. default 0x80000000 if VMSPLIT_2G
  1318. default 0xC0000000
  1319. config NR_CPUS
  1320. int "Maximum number of CPUs (2-32)"
  1321. range 2 32
  1322. depends on SMP
  1323. default "4"
  1324. config HOTPLUG_CPU
  1325. bool "Support for hot-pluggable CPUs"
  1326. depends on SMP && HOTPLUG
  1327. help
  1328. Say Y here to experiment with turning CPUs off and on. CPUs
  1329. can be controlled through /sys/devices/system/cpu.
  1330. config ARM_PSCI
  1331. bool "Support for the ARM Power State Coordination Interface (PSCI)"
  1332. depends on CPU_V7
  1333. help
  1334. Say Y here if you want Linux to communicate with system firmware
  1335. implementing the PSCI specification for CPU-centric power
  1336. management operations described in ARM document number ARM DEN
  1337. 0022A ("Power State Coordination Interface System Software on
  1338. ARM processors").
  1339. config LOCAL_TIMERS
  1340. bool "Use local timer interrupts"
  1341. depends on SMP
  1342. default y
  1343. help
  1344. Enable support for local timers on SMP platforms, rather then the
  1345. legacy IPI broadcast method. Local timers allows the system
  1346. accounting to be spread across the timer interval, preventing a
  1347. "thundering herd" at every timer tick.
  1348. # The GPIO number here must be sorted by descending number. In case of
  1349. # a multiplatform kernel, we just want the highest value required by the
  1350. # selected platforms.
  1351. config ARCH_NR_GPIO
  1352. int
  1353. default 1024 if ARCH_SHMOBILE || ARCH_TEGRA
  1354. default 512 if SOC_OMAP5
  1355. default 392 if ARCH_U8500
  1356. default 352 if ARCH_VT8500
  1357. default 288 if ARCH_SUNXI
  1358. default 264 if MACH_H4700
  1359. default 0
  1360. help
  1361. Maximum number of GPIOs in the system.
  1362. If unsure, leave the default value.
  1363. source kernel/Kconfig.preempt
  1364. config HZ
  1365. int
  1366. default 200 if ARCH_EBSA110 || ARCH_S3C24XX || ARCH_S5P64X0 || \
  1367. ARCH_S5PV210 || ARCH_EXYNOS4
  1368. default AT91_TIMER_HZ if ARCH_AT91
  1369. default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
  1370. default 100
  1371. config SCHED_HRTICK
  1372. def_bool HIGH_RES_TIMERS
  1373. config THUMB2_KERNEL
  1374. bool "Compile the kernel in Thumb-2 mode" if !CPU_THUMBONLY
  1375. depends on CPU_V7 && !CPU_V6 && !CPU_V6K
  1376. default y if CPU_THUMBONLY
  1377. select AEABI
  1378. select ARM_ASM_UNIFIED
  1379. select ARM_UNWIND
  1380. help
  1381. By enabling this option, the kernel will be compiled in
  1382. Thumb-2 mode. A compiler/assembler that understand the unified
  1383. ARM-Thumb syntax is needed.
  1384. If unsure, say N.
  1385. config THUMB2_AVOID_R_ARM_THM_JUMP11
  1386. bool "Work around buggy Thumb-2 short branch relocations in gas"
  1387. depends on THUMB2_KERNEL && MODULES
  1388. default y
  1389. help
  1390. Various binutils versions can resolve Thumb-2 branches to
  1391. locally-defined, preemptible global symbols as short-range "b.n"
  1392. branch instructions.
  1393. This is a problem, because there's no guarantee the final
  1394. destination of the symbol, or any candidate locations for a
  1395. trampoline, are within range of the branch. For this reason, the
  1396. kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
  1397. relocation in modules at all, and it makes little sense to add
  1398. support.
  1399. The symptom is that the kernel fails with an "unsupported
  1400. relocation" error when loading some modules.
  1401. Until fixed tools are available, passing
  1402. -fno-optimize-sibling-calls to gcc should prevent gcc generating
  1403. code which hits this problem, at the cost of a bit of extra runtime
  1404. stack usage in some cases.
  1405. The problem is described in more detail at:
  1406. https://bugs.launchpad.net/binutils-linaro/+bug/725126
  1407. Only Thumb-2 kernels are affected.
  1408. Unless you are sure your tools don't have this problem, say Y.
  1409. config ARM_ASM_UNIFIED
  1410. bool
  1411. config AEABI
  1412. bool "Use the ARM EABI to compile the kernel"
  1413. help
  1414. This option allows for the kernel to be compiled using the latest
  1415. ARM ABI (aka EABI). This is only useful if you are using a user
  1416. space environment that is also compiled with EABI.
  1417. Since there are major incompatibilities between the legacy ABI and
  1418. EABI, especially with regard to structure member alignment, this
  1419. option also changes the kernel syscall calling convention to
  1420. disambiguate both ABIs and allow for backward compatibility support
  1421. (selected with CONFIG_OABI_COMPAT).
  1422. To use this you need GCC version 4.0.0 or later.
  1423. config OABI_COMPAT
  1424. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  1425. depends on AEABI && !THUMB2_KERNEL
  1426. default y
  1427. help
  1428. This option preserves the old syscall interface along with the
  1429. new (ARM EABI) one. It also provides a compatibility layer to
  1430. intercept syscalls that have structure arguments which layout
  1431. in memory differs between the legacy ABI and the new ARM EABI
  1432. (only for non "thumb" binaries). This option adds a tiny
  1433. overhead to all syscalls and produces a slightly larger kernel.
  1434. If you know you'll be using only pure EABI user space then you
  1435. can say N here. If this option is not selected and you attempt
  1436. to execute a legacy ABI binary then the result will be
  1437. UNPREDICTABLE (in fact it can be predicted that it won't work
  1438. at all). If in doubt say Y.
  1439. config ARCH_HAS_HOLES_MEMORYMODEL
  1440. bool
  1441. config ARCH_SPARSEMEM_ENABLE
  1442. bool
  1443. config ARCH_SPARSEMEM_DEFAULT
  1444. def_bool ARCH_SPARSEMEM_ENABLE
  1445. config ARCH_SELECT_MEMORY_MODEL
  1446. def_bool ARCH_SPARSEMEM_ENABLE
  1447. config HAVE_ARCH_PFN_VALID
  1448. def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
  1449. config HIGHMEM
  1450. bool "High Memory Support"
  1451. depends on MMU
  1452. help
  1453. The address space of ARM processors is only 4 Gigabytes large
  1454. and it has to accommodate user address space, kernel address
  1455. space as well as some memory mapped IO. That means that, if you
  1456. have a large amount of physical memory and/or IO, not all of the
  1457. memory can be "permanently mapped" by the kernel. The physical
  1458. memory that is not permanently mapped is called "high memory".
  1459. Depending on the selected kernel/user memory split, minimum
  1460. vmalloc space and actual amount of RAM, you may not need this
  1461. option which should result in a slightly faster kernel.
  1462. If unsure, say n.
  1463. config HIGHPTE
  1464. bool "Allocate 2nd-level pagetables from highmem"
  1465. depends on HIGHMEM
  1466. config HW_PERF_EVENTS
  1467. bool "Enable hardware performance counter support for perf events"
  1468. depends on PERF_EVENTS
  1469. default y
  1470. help
  1471. Enable hardware performance counter support for perf events. If
  1472. disabled, perf events will use software events only.
  1473. source "mm/Kconfig"
  1474. config FORCE_MAX_ZONEORDER
  1475. int "Maximum zone order" if ARCH_SHMOBILE
  1476. range 11 64 if ARCH_SHMOBILE
  1477. default "12" if SOC_AM33XX
  1478. default "9" if SA1111
  1479. default "11"
  1480. help
  1481. The kernel memory allocator divides physically contiguous memory
  1482. blocks into "zones", where each zone is a power of two number of
  1483. pages. This option selects the largest power of two that the kernel
  1484. keeps in the memory allocator. If you need to allocate very large
  1485. blocks of physically contiguous memory, then you may need to
  1486. increase this value.
  1487. This config option is actually maximum order plus one. For example,
  1488. a value of 11 means that the largest free memory block is 2^10 pages.
  1489. config ALIGNMENT_TRAP
  1490. bool
  1491. depends on CPU_CP15_MMU
  1492. default y if !ARCH_EBSA110
  1493. select HAVE_PROC_CPU if PROC_FS
  1494. help
  1495. ARM processors cannot fetch/store information which is not
  1496. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  1497. address divisible by 4. On 32-bit ARM processors, these non-aligned
  1498. fetch/store instructions will be emulated in software if you say
  1499. here, which has a severe performance impact. This is necessary for
  1500. correct operation of some network protocols. With an IP-only
  1501. configuration it is safe to say N, otherwise say Y.
  1502. config UACCESS_WITH_MEMCPY
  1503. bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user()"
  1504. depends on MMU
  1505. default y if CPU_FEROCEON
  1506. help
  1507. Implement faster copy_to_user and clear_user methods for CPU
  1508. cores where a 8-word STM instruction give significantly higher
  1509. memory write throughput than a sequence of individual 32bit stores.
  1510. A possible side effect is a slight increase in scheduling latency
  1511. between threads sharing the same address space if they invoke
  1512. such copy operations with large buffers.
  1513. However, if the CPU data cache is using a write-allocate mode,
  1514. this option is unlikely to provide any performance gain.
  1515. config SECCOMP
  1516. bool
  1517. prompt "Enable seccomp to safely compute untrusted bytecode"
  1518. ---help---
  1519. This kernel feature is useful for number crunching applications
  1520. that may need to compute untrusted bytecode during their
  1521. execution. By using pipes or other transports made available to
  1522. the process as file descriptors supporting the read/write
  1523. syscalls, it's possible to isolate those applications in
  1524. their own address space using seccomp. Once seccomp is
  1525. enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
  1526. and the task is only allowed to execute a few safe syscalls
  1527. defined by each seccomp mode.
  1528. config CC_STACKPROTECTOR
  1529. bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
  1530. help
  1531. This option turns on the -fstack-protector GCC feature. This
  1532. feature puts, at the beginning of functions, a canary value on
  1533. the stack just before the return address, and validates
  1534. the value just before actually returning. Stack based buffer
  1535. overflows (that need to overwrite this return address) now also
  1536. overwrite the canary, which gets detected and the attack is then
  1537. neutralized via a kernel panic.
  1538. This feature requires gcc version 4.2 or above.
  1539. config XEN_DOM0
  1540. def_bool y
  1541. depends on XEN
  1542. config XEN
  1543. bool "Xen guest support on ARM (EXPERIMENTAL)"
  1544. depends on ARM && AEABI && OF
  1545. depends on CPU_V7 && !CPU_V6
  1546. depends on !GENERIC_ATOMIC64
  1547. select ARM_PSCI
  1548. help
  1549. Say Y if you want to run Linux in a Virtual Machine on Xen on ARM.
  1550. endmenu
  1551. menu "Boot options"
  1552. config USE_OF
  1553. bool "Flattened Device Tree support"
  1554. select IRQ_DOMAIN
  1555. select OF
  1556. select OF_EARLY_FLATTREE
  1557. help
  1558. Include support for flattened device tree machine descriptions.
  1559. config ATAGS
  1560. bool "Support for the traditional ATAGS boot data passing" if USE_OF
  1561. default y
  1562. help
  1563. This is the traditional way of passing data to the kernel at boot
  1564. time. If you are solely relying on the flattened device tree (or
  1565. the ARM_ATAG_DTB_COMPAT option) then you may unselect this option
  1566. to remove ATAGS support from your kernel binary. If unsure,
  1567. leave this to y.
  1568. config DEPRECATED_PARAM_STRUCT
  1569. bool "Provide old way to pass kernel parameters"
  1570. depends on ATAGS
  1571. help
  1572. This was deprecated in 2001 and announced to live on for 5 years.
  1573. Some old boot loaders still use this way.
  1574. # Compressed boot loader in ROM. Yes, we really want to ask about
  1575. # TEXT and BSS so we preserve their values in the config files.
  1576. config ZBOOT_ROM_TEXT
  1577. hex "Compressed ROM boot loader base address"
  1578. default "0"
  1579. help
  1580. The physical address at which the ROM-able zImage is to be
  1581. placed in the target. Platforms which normally make use of
  1582. ROM-able zImage formats normally set this to a suitable
  1583. value in their defconfig file.
  1584. If ZBOOT_ROM is not enabled, this has no effect.
  1585. config ZBOOT_ROM_BSS
  1586. hex "Compressed ROM boot loader BSS address"
  1587. default "0"
  1588. help
  1589. The base address of an area of read/write memory in the target
  1590. for the ROM-able zImage which must be available while the
  1591. decompressor is running. It must be large enough to hold the
  1592. entire decompressed kernel plus an additional 128 KiB.
  1593. Platforms which normally make use of ROM-able zImage formats
  1594. normally set this to a suitable value in their defconfig file.
  1595. If ZBOOT_ROM is not enabled, this has no effect.
  1596. config ZBOOT_ROM
  1597. bool "Compressed boot loader in ROM/flash"
  1598. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  1599. help
  1600. Say Y here if you intend to execute your compressed kernel image
  1601. (zImage) directly from ROM or flash. If unsure, say N.
  1602. choice
  1603. prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)"
  1604. depends on ZBOOT_ROM && ARCH_SH7372
  1605. default ZBOOT_ROM_NONE
  1606. help
  1607. Include experimental SD/MMC loading code in the ROM-able zImage.
  1608. With this enabled it is possible to write the ROM-able zImage
  1609. kernel image to an MMC or SD card and boot the kernel straight
  1610. from the reset vector. At reset the processor Mask ROM will load
  1611. the first part of the ROM-able zImage which in turn loads the
  1612. rest the kernel image to RAM.
  1613. config ZBOOT_ROM_NONE
  1614. bool "No SD/MMC loader in zImage (EXPERIMENTAL)"
  1615. help
  1616. Do not load image from SD or MMC
  1617. config ZBOOT_ROM_MMCIF
  1618. bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
  1619. help
  1620. Load image from MMCIF hardware block.
  1621. config ZBOOT_ROM_SH_MOBILE_SDHI
  1622. bool "Include SuperH Mobile SDHI loader in zImage (EXPERIMENTAL)"
  1623. help
  1624. Load image from SDHI hardware block
  1625. endchoice
  1626. config ARM_APPENDED_DTB
  1627. bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
  1628. depends on OF && !ZBOOT_ROM
  1629. help
  1630. With this option, the boot code will look for a device tree binary
  1631. (DTB) appended to zImage
  1632. (e.g. cat zImage <filename>.dtb > zImage_w_dtb).
  1633. This is meant as a backward compatibility convenience for those
  1634. systems with a bootloader that can't be upgraded to accommodate
  1635. the documented boot protocol using a device tree.
  1636. Beware that there is very little in terms of protection against
  1637. this option being confused by leftover garbage in memory that might
  1638. look like a DTB header after a reboot if no actual DTB is appended
  1639. to zImage. Do not leave this option active in a production kernel
  1640. if you don't intend to always append a DTB. Proper passing of the
  1641. location into r2 of a bootloader provided DTB is always preferable
  1642. to this option.
  1643. config ARM_ATAG_DTB_COMPAT
  1644. bool "Supplement the appended DTB with traditional ATAG information"
  1645. depends on ARM_APPENDED_DTB
  1646. help
  1647. Some old bootloaders can't be updated to a DTB capable one, yet
  1648. they provide ATAGs with memory configuration, the ramdisk address,
  1649. the kernel cmdline string, etc. Such information is dynamically
  1650. provided by the bootloader and can't always be stored in a static
  1651. DTB. To allow a device tree enabled kernel to be used with such
  1652. bootloaders, this option allows zImage to extract the information
  1653. from the ATAG list and store it at run time into the appended DTB.
  1654. choice
  1655. prompt "Kernel command line type" if ARM_ATAG_DTB_COMPAT
  1656. default ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
  1657. config ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
  1658. bool "Use bootloader kernel arguments if available"
  1659. help
  1660. Uses the command-line options passed by the boot loader instead of
  1661. the device tree bootargs property. If the boot loader doesn't provide
  1662. any, the device tree bootargs property will be used.
  1663. config ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEND
  1664. bool "Extend with bootloader kernel arguments"
  1665. help
  1666. The command-line arguments provided by the boot loader will be
  1667. appended to the the device tree bootargs property.
  1668. endchoice
  1669. config CMDLINE
  1670. string "Default kernel command string"
  1671. default ""
  1672. help
  1673. On some architectures (EBSA110 and CATS), there is currently no way
  1674. for the boot loader to pass arguments to the kernel. For these
  1675. architectures, you should supply some command-line options at build
  1676. time by entering them here. As a minimum, you should specify the
  1677. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  1678. choice
  1679. prompt "Kernel command line type" if CMDLINE != ""
  1680. default CMDLINE_FROM_BOOTLOADER
  1681. depends on ATAGS
  1682. config CMDLINE_FROM_BOOTLOADER
  1683. bool "Use bootloader kernel arguments if available"
  1684. help
  1685. Uses the command-line options passed by the boot loader. If
  1686. the boot loader doesn't provide any, the default kernel command
  1687. string provided in CMDLINE will be used.
  1688. config CMDLINE_EXTEND
  1689. bool "Extend bootloader kernel arguments"
  1690. help
  1691. The command-line arguments provided by the boot loader will be
  1692. appended to the default kernel command string.
  1693. config CMDLINE_FORCE
  1694. bool "Always use the default kernel command string"
  1695. help
  1696. Always use the default kernel command string, even if the boot
  1697. loader passes other arguments to the kernel.
  1698. This is useful if you cannot or don't want to change the
  1699. command-line options your boot loader passes to the kernel.
  1700. endchoice
  1701. config XIP_KERNEL
  1702. bool "Kernel Execute-In-Place from ROM"
  1703. depends on !ZBOOT_ROM && !ARM_LPAE && !ARCH_MULTIPLATFORM
  1704. help
  1705. Execute-In-Place allows the kernel to run from non-volatile storage
  1706. directly addressable by the CPU, such as NOR flash. This saves RAM
  1707. space since the text section of the kernel is not loaded from flash
  1708. to RAM. Read-write sections, such as the data section and stack,
  1709. are still copied to RAM. The XIP kernel is not compressed since
  1710. it has to run directly from flash, so it will take more space to
  1711. store it. The flash address used to link the kernel object files,
  1712. and for storing it, is configuration dependent. Therefore, if you
  1713. say Y here, you must know the proper physical address where to
  1714. store the kernel image depending on your own flash memory usage.
  1715. Also note that the make target becomes "make xipImage" rather than
  1716. "make zImage" or "make Image". The final kernel binary to put in
  1717. ROM memory will be arch/arm/boot/xipImage.
  1718. If unsure, say N.
  1719. config XIP_PHYS_ADDR
  1720. hex "XIP Kernel Physical Location"
  1721. depends on XIP_KERNEL
  1722. default "0x00080000"
  1723. help
  1724. This is the physical address in your flash memory the kernel will
  1725. be linked for and stored to. This address is dependent on your
  1726. own flash usage.
  1727. config KEXEC
  1728. bool "Kexec system call (EXPERIMENTAL)"
  1729. depends on (!SMP || PM_SLEEP_SMP)
  1730. help
  1731. kexec is a system call that implements the ability to shutdown your
  1732. current kernel, and to start another kernel. It is like a reboot
  1733. but it is independent of the system firmware. And like a reboot
  1734. you can start any kernel with it, not just Linux.
  1735. It is an ongoing process to be certain the hardware in a machine
  1736. is properly shutdown, so do not be surprised if this code does not
  1737. initially work for you. It may help to enable device hotplugging
  1738. support.
  1739. config ATAGS_PROC
  1740. bool "Export atags in procfs"
  1741. depends on ATAGS && KEXEC
  1742. default y
  1743. help
  1744. Should the atags used to boot the kernel be exported in an "atags"
  1745. file in procfs. Useful with kexec.
  1746. config CRASH_DUMP
  1747. bool "Build kdump crash kernel (EXPERIMENTAL)"
  1748. help
  1749. Generate crash dump after being started by kexec. This should
  1750. be normally only set in special crash dump kernels which are
  1751. loaded in the main kernel with kexec-tools into a specially
  1752. reserved region and then later executed after a crash by
  1753. kdump/kexec. The crash dump kernel must be compiled to a
  1754. memory address not used by the main kernel
  1755. For more details see Documentation/kdump/kdump.txt
  1756. config AUTO_ZRELADDR
  1757. bool "Auto calculation of the decompressed kernel image address"
  1758. depends on !ZBOOT_ROM && !ARCH_U300
  1759. help
  1760. ZRELADDR is the physical address where the decompressed kernel
  1761. image will be placed. If AUTO_ZRELADDR is selected, the address
  1762. will be determined at run-time by masking the current IP with
  1763. 0xf8000000. This assumes the zImage being placed in the first 128MB
  1764. from start of memory.
  1765. endmenu
  1766. menu "CPU Power Management"
  1767. if ARCH_HAS_CPUFREQ
  1768. source "drivers/cpufreq/Kconfig"
  1769. config CPU_FREQ_S3C
  1770. bool
  1771. help
  1772. Internal configuration node for common cpufreq on Samsung SoC
  1773. config CPU_FREQ_S3C24XX
  1774. bool "CPUfreq driver for Samsung S3C24XX series CPUs (EXPERIMENTAL)"
  1775. depends on ARCH_S3C24XX && CPU_FREQ
  1776. select CPU_FREQ_S3C
  1777. help
  1778. This enables the CPUfreq driver for the Samsung S3C24XX family
  1779. of CPUs.
  1780. For details, take a look at <file:Documentation/cpu-freq>.
  1781. If in doubt, say N.
  1782. config CPU_FREQ_S3C24XX_PLL
  1783. bool "Support CPUfreq changing of PLL frequency (EXPERIMENTAL)"
  1784. depends on CPU_FREQ_S3C24XX
  1785. help
  1786. Compile in support for changing the PLL frequency from the
  1787. S3C24XX series CPUfreq driver. The PLL takes time to settle
  1788. after a frequency change, so by default it is not enabled.
  1789. This also means that the PLL tables for the selected CPU(s) will
  1790. be built which may increase the size of the kernel image.
  1791. config CPU_FREQ_S3C24XX_DEBUG
  1792. bool "Debug CPUfreq Samsung driver core"
  1793. depends on CPU_FREQ_S3C24XX
  1794. help
  1795. Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
  1796. config CPU_FREQ_S3C24XX_IODEBUG
  1797. bool "Debug CPUfreq Samsung driver IO timing"
  1798. depends on CPU_FREQ_S3C24XX
  1799. help
  1800. Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
  1801. config CPU_FREQ_S3C24XX_DEBUGFS
  1802. bool "Export debugfs for CPUFreq"
  1803. depends on CPU_FREQ_S3C24XX && DEBUG_FS
  1804. help
  1805. Export status information via debugfs.
  1806. endif
  1807. source "drivers/cpuidle/Kconfig"
  1808. endmenu
  1809. menu "Floating point emulation"
  1810. comment "At least one emulation must be selected"
  1811. config FPE_NWFPE
  1812. bool "NWFPE math emulation"
  1813. depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
  1814. ---help---
  1815. Say Y to include the NWFPE floating point emulator in the kernel.
  1816. This is necessary to run most binaries. Linux does not currently
  1817. support floating point hardware so you need to say Y here even if
  1818. your machine has an FPA or floating point co-processor podule.
  1819. You may say N here if you are going to load the Acorn FPEmulator
  1820. early in the bootup.
  1821. config FPE_NWFPE_XP
  1822. bool "Support extended precision"
  1823. depends on FPE_NWFPE
  1824. help
  1825. Say Y to include 80-bit support in the kernel floating-point
  1826. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  1827. Note that gcc does not generate 80-bit operations by default,
  1828. so in most cases this option only enlarges the size of the
  1829. floating point emulator without any good reason.
  1830. You almost surely want to say N here.
  1831. config FPE_FASTFPE
  1832. bool "FastFPE math emulation (EXPERIMENTAL)"
  1833. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3
  1834. ---help---
  1835. Say Y here to include the FAST floating point emulator in the kernel.
  1836. This is an experimental much faster emulator which now also has full
  1837. precision for the mantissa. It does not support any exceptions.
  1838. It is very simple, and approximately 3-6 times faster than NWFPE.
  1839. It should be sufficient for most programs. It may be not suitable
  1840. for scientific calculations, but you have to check this for yourself.
  1841. If you do not feel you need a faster FP emulation you should better
  1842. choose NWFPE.
  1843. config VFP
  1844. bool "VFP-format floating point maths"
  1845. depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  1846. help
  1847. Say Y to include VFP support code in the kernel. This is needed
  1848. if your hardware includes a VFP unit.
  1849. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  1850. release notes and additional status information.
  1851. Say N if your target does not have VFP hardware.
  1852. config VFPv3
  1853. bool
  1854. depends on VFP
  1855. default y if CPU_V7
  1856. config NEON
  1857. bool "Advanced SIMD (NEON) Extension support"
  1858. depends on VFPv3 && CPU_V7
  1859. help
  1860. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  1861. Extension.
  1862. endmenu
  1863. menu "Userspace binary formats"
  1864. source "fs/Kconfig.binfmt"
  1865. config ARTHUR
  1866. tristate "RISC OS personality"
  1867. depends on !AEABI
  1868. help
  1869. Say Y here to include the kernel code necessary if you want to run
  1870. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  1871. experimental; if this sounds frightening, say N and sleep in peace.
  1872. You can also say M here to compile this support as a module (which
  1873. will be called arthur).
  1874. endmenu
  1875. menu "Power management options"
  1876. source "kernel/power/Kconfig"
  1877. config ARCH_SUSPEND_POSSIBLE
  1878. depends on !ARCH_S5PC100
  1879. depends on CPU_ARM920T || CPU_ARM926T || CPU_SA1100 || \
  1880. CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE || CPU_MOHAWK
  1881. def_bool y
  1882. config ARM_CPU_SUSPEND
  1883. def_bool PM_SLEEP
  1884. endmenu
  1885. source "net/Kconfig"
  1886. source "drivers/Kconfig"
  1887. source "fs/Kconfig"
  1888. source "arch/arm/Kconfig.debug"
  1889. source "security/Kconfig"
  1890. source "crypto/Kconfig"
  1891. source "lib/Kconfig"
  1892. source "arch/arm/kvm/Kconfig"