Kconfig 64 KB

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  1. config ARM
  2. bool
  3. default y
  4. select HAVE_AOUT
  5. select HAVE_DMA_API_DEBUG
  6. select HAVE_IDE if PCI || ISA || PCMCIA
  7. select HAVE_MEMBLOCK
  8. select RTC_LIB
  9. select SYS_SUPPORTS_APM_EMULATION
  10. select GENERIC_ATOMIC64 if (CPU_V6 || !CPU_32v6K || !AEABI)
  11. select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
  12. select HAVE_ARCH_KGDB
  13. select HAVE_KPROBES if !XIP_KERNEL
  14. select HAVE_KRETPROBES if (HAVE_KPROBES)
  15. select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
  16. select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
  17. select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL)
  18. select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL)
  19. select HAVE_GENERIC_DMA_COHERENT
  20. select HAVE_KERNEL_GZIP
  21. select HAVE_KERNEL_LZO
  22. select HAVE_KERNEL_LZMA
  23. select HAVE_IRQ_WORK
  24. select HAVE_PERF_EVENTS
  25. select PERF_USE_VMALLOC
  26. select HAVE_REGS_AND_STACK_ACCESS_API
  27. select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7))
  28. select HAVE_C_RECORDMCOUNT
  29. select HAVE_GENERIC_HARDIRQS
  30. select HAVE_SPARSE_IRQ
  31. select GENERIC_IRQ_SHOW
  32. select CPU_PM if (SUSPEND || CPU_IDLE)
  33. help
  34. The ARM series is a line of low-power-consumption RISC chip designs
  35. licensed by ARM Ltd and targeted at embedded applications and
  36. handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
  37. manufactured, but legacy ARM-based PC hardware remains popular in
  38. Europe. There is an ARM Linux project with a web page at
  39. <http://www.arm.linux.org.uk/>.
  40. config ARM_HAS_SG_CHAIN
  41. bool
  42. config HAVE_PWM
  43. bool
  44. config MIGHT_HAVE_PCI
  45. bool
  46. config SYS_SUPPORTS_APM_EMULATION
  47. bool
  48. config HAVE_SCHED_CLOCK
  49. bool
  50. config GENERIC_GPIO
  51. bool
  52. config ARCH_USES_GETTIMEOFFSET
  53. bool
  54. default n
  55. config GENERIC_CLOCKEVENTS
  56. bool
  57. config GENERIC_CLOCKEVENTS_BROADCAST
  58. bool
  59. depends on GENERIC_CLOCKEVENTS
  60. default y if SMP
  61. config KTIME_SCALAR
  62. bool
  63. default y
  64. config HAVE_TCM
  65. bool
  66. select GENERIC_ALLOCATOR
  67. config HAVE_PROC_CPU
  68. bool
  69. config NO_IOPORT
  70. bool
  71. config EISA
  72. bool
  73. ---help---
  74. The Extended Industry Standard Architecture (EISA) bus was
  75. developed as an open alternative to the IBM MicroChannel bus.
  76. The EISA bus provided some of the features of the IBM MicroChannel
  77. bus while maintaining backward compatibility with cards made for
  78. the older ISA bus. The EISA bus saw limited use between 1988 and
  79. 1995 when it was made obsolete by the PCI bus.
  80. Say Y here if you are building a kernel for an EISA-based machine.
  81. Otherwise, say N.
  82. config SBUS
  83. bool
  84. config MCA
  85. bool
  86. help
  87. MicroChannel Architecture is found in some IBM PS/2 machines and
  88. laptops. It is a bus system similar to PCI or ISA. See
  89. <file:Documentation/mca.txt> (and especially the web page given
  90. there) before attempting to build an MCA bus kernel.
  91. config STACKTRACE_SUPPORT
  92. bool
  93. default y
  94. config HAVE_LATENCYTOP_SUPPORT
  95. bool
  96. depends on !SMP
  97. default y
  98. config LOCKDEP_SUPPORT
  99. bool
  100. default y
  101. config TRACE_IRQFLAGS_SUPPORT
  102. bool
  103. default y
  104. config HARDIRQS_SW_RESEND
  105. bool
  106. default y
  107. config GENERIC_IRQ_PROBE
  108. bool
  109. default y
  110. config GENERIC_LOCKBREAK
  111. bool
  112. default y
  113. depends on SMP && PREEMPT
  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 ARCH_HAS_CPU_IDLE_WAIT
  130. def_bool y
  131. config GENERIC_HWEIGHT
  132. bool
  133. default y
  134. config GENERIC_CALIBRATE_DELAY
  135. bool
  136. default y
  137. config ARCH_MAY_HAVE_PC_FDC
  138. bool
  139. config ZONE_DMA
  140. bool
  141. config NEED_DMA_MAP_STATE
  142. def_bool y
  143. config GENERIC_ISA_DMA
  144. bool
  145. config FIQ
  146. bool
  147. config ARCH_MTD_XIP
  148. bool
  149. config VECTORS_BASE
  150. hex
  151. default 0xffff0000 if MMU || CPU_HIGH_VECTOR
  152. default DRAM_BASE if REMAP_VECTORS_TO_RAM
  153. default 0x00000000
  154. help
  155. The base address of exception vectors.
  156. config ARM_PATCH_PHYS_VIRT
  157. bool "Patch physical to virtual translations at runtime" if EMBEDDED
  158. default y
  159. depends on !XIP_KERNEL && MMU
  160. depends on !ARCH_REALVIEW || !SPARSEMEM
  161. help
  162. Patch phys-to-virt and virt-to-phys translation functions at
  163. boot and module load time according to the position of the
  164. kernel in system memory.
  165. This can only be used with non-XIP MMU kernels where the base
  166. of physical memory is at a 16MB boundary.
  167. Only disable this option if you know that you do not require
  168. this feature (eg, building a kernel for a single machine) and
  169. you need to shrink the kernel to the minimal size.
  170. config NEED_MACH_MEMORY_H
  171. bool
  172. help
  173. Select this when mach/memory.h is required to provide special
  174. definitions for this platform. The need for mach/memory.h should
  175. be avoided when possible.
  176. config PHYS_OFFSET
  177. hex "Physical address of main memory"
  178. depends on !ARM_PATCH_PHYS_VIRT && !NEED_MACH_MEMORY_H
  179. help
  180. Please provide the physical address corresponding to the
  181. location of main memory in your system.
  182. config GENERIC_BUG
  183. def_bool y
  184. depends on BUG
  185. source "init/Kconfig"
  186. source "kernel/Kconfig.freezer"
  187. menu "System Type"
  188. config MMU
  189. bool "MMU-based Paged Memory Management Support"
  190. default y
  191. help
  192. Select if you want MMU-based virtualised addressing space
  193. support by paged memory management. If unsure, say 'Y'.
  194. #
  195. # The "ARM system type" choice list is ordered alphabetically by option
  196. # text. Please add new entries in the option alphabetic order.
  197. #
  198. choice
  199. prompt "ARM system type"
  200. default ARCH_VERSATILE
  201. config ARCH_INTEGRATOR
  202. bool "ARM Ltd. Integrator family"
  203. select ARM_AMBA
  204. select ARCH_HAS_CPUFREQ
  205. select CLKDEV_LOOKUP
  206. select HAVE_MACH_CLKDEV
  207. select ICST
  208. select GENERIC_CLOCKEVENTS
  209. select PLAT_VERSATILE
  210. select PLAT_VERSATILE_FPGA_IRQ
  211. select NEED_MACH_MEMORY_H
  212. help
  213. Support for ARM's Integrator platform.
  214. config ARCH_REALVIEW
  215. bool "ARM Ltd. RealView family"
  216. select ARM_AMBA
  217. select CLKDEV_LOOKUP
  218. select HAVE_MACH_CLKDEV
  219. select ICST
  220. select GENERIC_CLOCKEVENTS
  221. select ARCH_WANT_OPTIONAL_GPIOLIB
  222. select PLAT_VERSATILE
  223. select PLAT_VERSATILE_CLCD
  224. select ARM_TIMER_SP804
  225. select GPIO_PL061 if GPIOLIB
  226. select NEED_MACH_MEMORY_H
  227. select MULTI_IRQ_HANDLER
  228. help
  229. This enables support for ARM Ltd RealView boards.
  230. config ARCH_VERSATILE
  231. bool "ARM Ltd. Versatile family"
  232. select ARM_AMBA
  233. select ARM_VIC
  234. select CLKDEV_LOOKUP
  235. select HAVE_MACH_CLKDEV
  236. select ICST
  237. select GENERIC_CLOCKEVENTS
  238. select ARCH_WANT_OPTIONAL_GPIOLIB
  239. select PLAT_VERSATILE
  240. select PLAT_VERSATILE_CLCD
  241. select PLAT_VERSATILE_FPGA_IRQ
  242. select ARM_TIMER_SP804
  243. help
  244. This enables support for ARM Ltd Versatile board.
  245. config ARCH_VEXPRESS
  246. bool "ARM Ltd. Versatile Express family"
  247. select ARCH_WANT_OPTIONAL_GPIOLIB
  248. select ARM_AMBA
  249. select ARM_TIMER_SP804
  250. select CLKDEV_LOOKUP
  251. select HAVE_MACH_CLKDEV
  252. select GENERIC_CLOCKEVENTS
  253. select HAVE_CLK
  254. select HAVE_PATA_PLATFORM
  255. select ICST
  256. select PLAT_VERSATILE
  257. select PLAT_VERSATILE_CLCD
  258. select MULTI_IRQ_HANDLER
  259. help
  260. This enables support for the ARM Ltd Versatile Express boards.
  261. config ARCH_AT91
  262. bool "Atmel AT91"
  263. select ARCH_REQUIRE_GPIOLIB
  264. select HAVE_CLK
  265. select CLKDEV_LOOKUP
  266. help
  267. This enables support for systems based on the Atmel AT91RM9200,
  268. AT91SAM9 and AT91CAP9 processors.
  269. config ARCH_BCMRING
  270. bool "Broadcom BCMRING"
  271. depends on MMU
  272. select CPU_V6
  273. select ARM_AMBA
  274. select ARM_TIMER_SP804
  275. select CLKDEV_LOOKUP
  276. select GENERIC_CLOCKEVENTS
  277. select ARCH_WANT_OPTIONAL_GPIOLIB
  278. help
  279. Support for Broadcom's BCMRing platform.
  280. config ARCH_HIGHBANK
  281. bool "Calxeda Highbank-based"
  282. select ARCH_WANT_OPTIONAL_GPIOLIB
  283. select ARM_AMBA
  284. select ARM_GIC
  285. select ARM_TIMER_SP804
  286. select CLKDEV_LOOKUP
  287. select CPU_V7
  288. select GENERIC_CLOCKEVENTS
  289. select HAVE_ARM_SCU
  290. select USE_OF
  291. select MULTI_IRQ_HANDLER
  292. help
  293. Support for the Calxeda Highbank SoC based boards.
  294. config ARCH_CLPS711X
  295. bool "Cirrus Logic CLPS711x/EP721x-based"
  296. select CPU_ARM720T
  297. select ARCH_USES_GETTIMEOFFSET
  298. select NEED_MACH_MEMORY_H
  299. help
  300. Support for Cirrus Logic 711x/721x based boards.
  301. config ARCH_CNS3XXX
  302. bool "Cavium Networks CNS3XXX family"
  303. select CPU_V6K
  304. select GENERIC_CLOCKEVENTS
  305. select ARM_GIC
  306. select MIGHT_HAVE_PCI
  307. select PCI_DOMAINS if PCI
  308. help
  309. Support for Cavium Networks CNS3XXX platform.
  310. config ARCH_GEMINI
  311. bool "Cortina Systems Gemini"
  312. select CPU_FA526
  313. select ARCH_REQUIRE_GPIOLIB
  314. select ARCH_USES_GETTIMEOFFSET
  315. help
  316. Support for the Cortina Systems Gemini family SoCs
  317. config ARCH_PRIMA2
  318. bool "CSR SiRFSoC PRIMA2 ARM Cortex A9 Platform"
  319. select CPU_V7
  320. select NO_IOPORT
  321. select GENERIC_CLOCKEVENTS
  322. select CLKDEV_LOOKUP
  323. select GENERIC_IRQ_CHIP
  324. select USE_OF
  325. select ZONE_DMA
  326. help
  327. Support for CSR SiRFSoC ARM Cortex A9 Platform
  328. config ARCH_EBSA110
  329. bool "EBSA-110"
  330. select CPU_SA110
  331. select ISA
  332. select NO_IOPORT
  333. select ARCH_USES_GETTIMEOFFSET
  334. select NEED_MACH_MEMORY_H
  335. help
  336. This is an evaluation board for the StrongARM processor available
  337. from Digital. It has limited hardware on-board, including an
  338. Ethernet interface, two PCMCIA sockets, two serial ports and a
  339. parallel port.
  340. config ARCH_EP93XX
  341. bool "EP93xx-based"
  342. select CPU_ARM920T
  343. select ARM_AMBA
  344. select ARM_VIC
  345. select CLKDEV_LOOKUP
  346. select ARCH_REQUIRE_GPIOLIB
  347. select ARCH_HAS_HOLES_MEMORYMODEL
  348. select ARCH_USES_GETTIMEOFFSET
  349. select NEED_MACH_MEMORY_H
  350. help
  351. This enables support for the Cirrus EP93xx series of CPUs.
  352. config ARCH_FOOTBRIDGE
  353. bool "FootBridge"
  354. select CPU_SA110
  355. select FOOTBRIDGE
  356. select GENERIC_CLOCKEVENTS
  357. select HAVE_IDE
  358. select NEED_MACH_MEMORY_H
  359. help
  360. Support for systems based on the DC21285 companion chip
  361. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  362. config ARCH_MXC
  363. bool "Freescale MXC/iMX-based"
  364. select GENERIC_CLOCKEVENTS
  365. select ARCH_REQUIRE_GPIOLIB
  366. select CLKDEV_LOOKUP
  367. select CLKSRC_MMIO
  368. select GENERIC_IRQ_CHIP
  369. select HAVE_SCHED_CLOCK
  370. select MULTI_IRQ_HANDLER
  371. help
  372. Support for Freescale MXC/iMX-based family of processors
  373. config ARCH_MXS
  374. bool "Freescale MXS-based"
  375. select GENERIC_CLOCKEVENTS
  376. select ARCH_REQUIRE_GPIOLIB
  377. select CLKDEV_LOOKUP
  378. select CLKSRC_MMIO
  379. help
  380. Support for Freescale MXS-based family of processors
  381. config ARCH_NETX
  382. bool "Hilscher NetX based"
  383. select CLKSRC_MMIO
  384. select CPU_ARM926T
  385. select ARM_VIC
  386. select GENERIC_CLOCKEVENTS
  387. help
  388. This enables support for systems based on the Hilscher NetX Soc
  389. config ARCH_H720X
  390. bool "Hynix HMS720x-based"
  391. select CPU_ARM720T
  392. select ISA_DMA_API
  393. select ARCH_USES_GETTIMEOFFSET
  394. help
  395. This enables support for systems based on the Hynix HMS720x
  396. config ARCH_IOP13XX
  397. bool "IOP13xx-based"
  398. depends on MMU
  399. select CPU_XSC3
  400. select PLAT_IOP
  401. select PCI
  402. select ARCH_SUPPORTS_MSI
  403. select VMSPLIT_1G
  404. select NEED_MACH_MEMORY_H
  405. help
  406. Support for Intel's IOP13XX (XScale) family of processors.
  407. config ARCH_IOP32X
  408. bool "IOP32x-based"
  409. depends on MMU
  410. select CPU_XSCALE
  411. select PLAT_IOP
  412. select PCI
  413. select ARCH_REQUIRE_GPIOLIB
  414. help
  415. Support for Intel's 80219 and IOP32X (XScale) family of
  416. processors.
  417. config ARCH_IOP33X
  418. bool "IOP33x-based"
  419. depends on MMU
  420. select CPU_XSCALE
  421. select PLAT_IOP
  422. select PCI
  423. select ARCH_REQUIRE_GPIOLIB
  424. help
  425. Support for Intel's IOP33X (XScale) family of processors.
  426. config ARCH_IXP23XX
  427. bool "IXP23XX-based"
  428. depends on MMU
  429. select CPU_XSC3
  430. select PCI
  431. select ARCH_USES_GETTIMEOFFSET
  432. select NEED_MACH_MEMORY_H
  433. help
  434. Support for Intel's IXP23xx (XScale) family of processors.
  435. config ARCH_IXP2000
  436. bool "IXP2400/2800-based"
  437. depends on MMU
  438. select CPU_XSCALE
  439. select PCI
  440. select ARCH_USES_GETTIMEOFFSET
  441. select NEED_MACH_MEMORY_H
  442. help
  443. Support for Intel's IXP2400/2800 (XScale) family of processors.
  444. config ARCH_IXP4XX
  445. bool "IXP4xx-based"
  446. depends on MMU
  447. select CLKSRC_MMIO
  448. select CPU_XSCALE
  449. select GENERIC_GPIO
  450. select GENERIC_CLOCKEVENTS
  451. select HAVE_SCHED_CLOCK
  452. select MIGHT_HAVE_PCI
  453. select DMABOUNCE if PCI
  454. help
  455. Support for Intel's IXP4XX (XScale) family of processors.
  456. config ARCH_DOVE
  457. bool "Marvell Dove"
  458. select CPU_V7
  459. select PCI
  460. select ARCH_REQUIRE_GPIOLIB
  461. select GENERIC_CLOCKEVENTS
  462. select PLAT_ORION
  463. help
  464. Support for the Marvell Dove SoC 88AP510
  465. config ARCH_KIRKWOOD
  466. bool "Marvell Kirkwood"
  467. select CPU_FEROCEON
  468. select PCI
  469. select ARCH_REQUIRE_GPIOLIB
  470. select GENERIC_CLOCKEVENTS
  471. select PLAT_ORION
  472. help
  473. Support for the following Marvell Kirkwood series SoCs:
  474. 88F6180, 88F6192 and 88F6281.
  475. config ARCH_LPC32XX
  476. bool "NXP LPC32XX"
  477. select CLKSRC_MMIO
  478. select CPU_ARM926T
  479. select ARCH_REQUIRE_GPIOLIB
  480. select HAVE_IDE
  481. select ARM_AMBA
  482. select USB_ARCH_HAS_OHCI
  483. select CLKDEV_LOOKUP
  484. select GENERIC_CLOCKEVENTS
  485. help
  486. Support for the NXP LPC32XX family of processors
  487. config ARCH_MV78XX0
  488. bool "Marvell MV78xx0"
  489. select CPU_FEROCEON
  490. select PCI
  491. select ARCH_REQUIRE_GPIOLIB
  492. select GENERIC_CLOCKEVENTS
  493. select PLAT_ORION
  494. help
  495. Support for the following Marvell MV78xx0 series SoCs:
  496. MV781x0, MV782x0.
  497. config ARCH_ORION5X
  498. bool "Marvell Orion"
  499. depends on MMU
  500. select CPU_FEROCEON
  501. select PCI
  502. select ARCH_REQUIRE_GPIOLIB
  503. select GENERIC_CLOCKEVENTS
  504. select PLAT_ORION
  505. help
  506. Support for the following Marvell Orion 5x series SoCs:
  507. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  508. Orion-2 (5281), Orion-1-90 (6183).
  509. config ARCH_MMP
  510. bool "Marvell PXA168/910/MMP2"
  511. depends on MMU
  512. select ARCH_REQUIRE_GPIOLIB
  513. select CLKDEV_LOOKUP
  514. select GENERIC_CLOCKEVENTS
  515. select HAVE_SCHED_CLOCK
  516. select TICK_ONESHOT
  517. select PLAT_PXA
  518. select SPARSE_IRQ
  519. select GENERIC_ALLOCATOR
  520. help
  521. Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
  522. config ARCH_KS8695
  523. bool "Micrel/Kendin KS8695"
  524. select CPU_ARM922T
  525. select ARCH_REQUIRE_GPIOLIB
  526. select ARCH_USES_GETTIMEOFFSET
  527. select NEED_MACH_MEMORY_H
  528. help
  529. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  530. System-on-Chip devices.
  531. config ARCH_W90X900
  532. bool "Nuvoton W90X900 CPU"
  533. select CPU_ARM926T
  534. select ARCH_REQUIRE_GPIOLIB
  535. select CLKDEV_LOOKUP
  536. select CLKSRC_MMIO
  537. select GENERIC_CLOCKEVENTS
  538. help
  539. Support for Nuvoton (Winbond logic dept.) ARM9 processor,
  540. At present, the w90x900 has been renamed nuc900, regarding
  541. the ARM series product line, you can login the following
  542. link address to know more.
  543. <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
  544. ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
  545. config ARCH_TEGRA
  546. bool "NVIDIA Tegra"
  547. select CLKDEV_LOOKUP
  548. select CLKSRC_MMIO
  549. select GENERIC_CLOCKEVENTS
  550. select GENERIC_GPIO
  551. select HAVE_CLK
  552. select HAVE_SCHED_CLOCK
  553. select ARCH_HAS_CPUFREQ
  554. help
  555. This enables support for NVIDIA Tegra based systems (Tegra APX,
  556. Tegra 6xx and Tegra 2 series).
  557. config ARCH_PICOXCELL
  558. bool "Picochip picoXcell"
  559. select ARCH_REQUIRE_GPIOLIB
  560. select ARM_PATCH_PHYS_VIRT
  561. select ARM_VIC
  562. select CPU_V6K
  563. select DW_APB_TIMER
  564. select GENERIC_CLOCKEVENTS
  565. select GENERIC_GPIO
  566. select HAVE_SCHED_CLOCK
  567. select HAVE_TCM
  568. select NO_IOPORT
  569. select USE_OF
  570. help
  571. This enables support for systems based on the Picochip picoXcell
  572. family of Femtocell devices. The picoxcell support requires device tree
  573. for all boards.
  574. config ARCH_PNX4008
  575. bool "Philips Nexperia PNX4008 Mobile"
  576. select CPU_ARM926T
  577. select CLKDEV_LOOKUP
  578. select ARCH_USES_GETTIMEOFFSET
  579. help
  580. This enables support for Philips PNX4008 mobile platform.
  581. config ARCH_PXA
  582. bool "PXA2xx/PXA3xx-based"
  583. depends on MMU
  584. select ARCH_MTD_XIP
  585. select ARCH_HAS_CPUFREQ
  586. select CLKDEV_LOOKUP
  587. select CLKSRC_MMIO
  588. select ARCH_REQUIRE_GPIOLIB
  589. select GENERIC_CLOCKEVENTS
  590. select HAVE_SCHED_CLOCK
  591. select TICK_ONESHOT
  592. select PLAT_PXA
  593. select SPARSE_IRQ
  594. select AUTO_ZRELADDR
  595. select MULTI_IRQ_HANDLER
  596. select ARM_CPU_SUSPEND if PM
  597. select HAVE_IDE
  598. help
  599. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  600. config ARCH_MSM
  601. bool "Qualcomm MSM"
  602. select HAVE_CLK
  603. select GENERIC_CLOCKEVENTS
  604. select ARCH_REQUIRE_GPIOLIB
  605. select CLKDEV_LOOKUP
  606. help
  607. Support for Qualcomm MSM/QSD based systems. This runs on the
  608. apps processor of the MSM/QSD and depends on a shared memory
  609. interface to the modem processor which runs the baseband
  610. stack and controls some vital subsystems
  611. (clock and power control, etc).
  612. config ARCH_SHMOBILE
  613. bool "Renesas SH-Mobile / R-Mobile"
  614. select HAVE_CLK
  615. select CLKDEV_LOOKUP
  616. select HAVE_MACH_CLKDEV
  617. select GENERIC_CLOCKEVENTS
  618. select NO_IOPORT
  619. select SPARSE_IRQ
  620. select MULTI_IRQ_HANDLER
  621. select PM_GENERIC_DOMAINS if PM
  622. select NEED_MACH_MEMORY_H
  623. help
  624. Support for Renesas's SH-Mobile and R-Mobile ARM platforms.
  625. config ARCH_RPC
  626. bool "RiscPC"
  627. select ARCH_ACORN
  628. select FIQ
  629. select TIMER_ACORN
  630. select ARCH_MAY_HAVE_PC_FDC
  631. select HAVE_PATA_PLATFORM
  632. select ISA_DMA_API
  633. select NO_IOPORT
  634. select ARCH_SPARSEMEM_ENABLE
  635. select ARCH_USES_GETTIMEOFFSET
  636. select HAVE_IDE
  637. select NEED_MACH_MEMORY_H
  638. help
  639. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  640. CD-ROM interface, serial and parallel port, and the floppy drive.
  641. config ARCH_SA1100
  642. bool "SA1100-based"
  643. select CLKSRC_MMIO
  644. select CPU_SA1100
  645. select ISA
  646. select ARCH_SPARSEMEM_ENABLE
  647. select ARCH_MTD_XIP
  648. select ARCH_HAS_CPUFREQ
  649. select CPU_FREQ
  650. select GENERIC_CLOCKEVENTS
  651. select HAVE_CLK
  652. select HAVE_SCHED_CLOCK
  653. select TICK_ONESHOT
  654. select ARCH_REQUIRE_GPIOLIB
  655. select HAVE_IDE
  656. select NEED_MACH_MEMORY_H
  657. help
  658. Support for StrongARM 11x0 based boards.
  659. config ARCH_S3C2410
  660. bool "Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443, S3C2450"
  661. select GENERIC_GPIO
  662. select ARCH_HAS_CPUFREQ
  663. select HAVE_CLK
  664. select CLKDEV_LOOKUP
  665. select ARCH_USES_GETTIMEOFFSET
  666. select HAVE_S3C2410_I2C if I2C
  667. help
  668. Samsung S3C2410X CPU based systems, such as the Simtec Electronics
  669. BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
  670. the Samsung SMDK2410 development board (and derivatives).
  671. Note, the S3C2416 and the S3C2450 are so close that they even share
  672. the same SoC ID code. This means that there is no separate machine
  673. directory (no arch/arm/mach-s3c2450) as the S3C2416 was first.
  674. config ARCH_S3C64XX
  675. bool "Samsung S3C64XX"
  676. select PLAT_SAMSUNG
  677. select CPU_V6
  678. select ARM_VIC
  679. select HAVE_CLK
  680. select HAVE_TCM
  681. select CLKDEV_LOOKUP
  682. select NO_IOPORT
  683. select ARCH_USES_GETTIMEOFFSET
  684. select ARCH_HAS_CPUFREQ
  685. select ARCH_REQUIRE_GPIOLIB
  686. select SAMSUNG_CLKSRC
  687. select SAMSUNG_IRQ_VIC_TIMER
  688. select S3C_GPIO_TRACK
  689. select S3C_DEV_NAND
  690. select USB_ARCH_HAS_OHCI
  691. select SAMSUNG_GPIOLIB_4BIT
  692. select HAVE_S3C2410_I2C if I2C
  693. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  694. help
  695. Samsung S3C64XX series based systems
  696. config ARCH_S5P64X0
  697. bool "Samsung S5P6440 S5P6450"
  698. select CPU_V6
  699. select GENERIC_GPIO
  700. select HAVE_CLK
  701. select CLKDEV_LOOKUP
  702. select CLKSRC_MMIO
  703. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  704. select GENERIC_CLOCKEVENTS
  705. select HAVE_SCHED_CLOCK
  706. select HAVE_S3C2410_I2C if I2C
  707. select HAVE_S3C_RTC if RTC_CLASS
  708. help
  709. Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
  710. SMDK6450.
  711. config ARCH_S5PC100
  712. bool "Samsung S5PC100"
  713. select GENERIC_GPIO
  714. select HAVE_CLK
  715. select CLKDEV_LOOKUP
  716. select CPU_V7
  717. select ARM_L1_CACHE_SHIFT_6
  718. select ARCH_USES_GETTIMEOFFSET
  719. select HAVE_S3C2410_I2C if I2C
  720. select HAVE_S3C_RTC if RTC_CLASS
  721. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  722. help
  723. Samsung S5PC100 series based systems
  724. config ARCH_S5PV210
  725. bool "Samsung S5PV210/S5PC110"
  726. select CPU_V7
  727. select ARCH_SPARSEMEM_ENABLE
  728. select ARCH_HAS_HOLES_MEMORYMODEL
  729. select GENERIC_GPIO
  730. select HAVE_CLK
  731. select CLKDEV_LOOKUP
  732. select CLKSRC_MMIO
  733. select ARM_L1_CACHE_SHIFT_6
  734. select ARCH_HAS_CPUFREQ
  735. select GENERIC_CLOCKEVENTS
  736. select HAVE_SCHED_CLOCK
  737. select HAVE_S3C2410_I2C if I2C
  738. select HAVE_S3C_RTC if RTC_CLASS
  739. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  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 CPU_V7
  746. select ARCH_SPARSEMEM_ENABLE
  747. select ARCH_HAS_HOLES_MEMORYMODEL
  748. select GENERIC_GPIO
  749. select HAVE_CLK
  750. select CLKDEV_LOOKUP
  751. select ARCH_HAS_CPUFREQ
  752. select GENERIC_CLOCKEVENTS
  753. select HAVE_S3C_RTC if RTC_CLASS
  754. select HAVE_S3C2410_I2C if I2C
  755. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  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 CPU_SA110
  762. select ISA
  763. select ISA_DMA
  764. select ZONE_DMA
  765. select PCI
  766. select ARCH_USES_GETTIMEOFFSET
  767. select NEED_MACH_MEMORY_H
  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_TCC_926
  772. bool "Telechips TCC ARM926-based systems"
  773. select CLKSRC_MMIO
  774. select CPU_ARM926T
  775. select HAVE_CLK
  776. select CLKDEV_LOOKUP
  777. select GENERIC_CLOCKEVENTS
  778. help
  779. Support for Telechips TCC ARM926-based systems.
  780. config ARCH_U300
  781. bool "ST-Ericsson U300 Series"
  782. depends on MMU
  783. select CLKSRC_MMIO
  784. select CPU_ARM926T
  785. select HAVE_SCHED_CLOCK
  786. select HAVE_TCM
  787. select ARM_AMBA
  788. select ARM_PATCH_PHYS_VIRT
  789. select ARM_VIC
  790. select GENERIC_CLOCKEVENTS
  791. select CLKDEV_LOOKUP
  792. select HAVE_MACH_CLKDEV
  793. select GENERIC_GPIO
  794. select ARCH_REQUIRE_GPIOLIB
  795. select NEED_MACH_MEMORY_H
  796. help
  797. Support for ST-Ericsson U300 series mobile platforms.
  798. config ARCH_U8500
  799. bool "ST-Ericsson U8500 Series"
  800. select CPU_V7
  801. select ARM_AMBA
  802. select GENERIC_CLOCKEVENTS
  803. select CLKDEV_LOOKUP
  804. select ARCH_REQUIRE_GPIOLIB
  805. select ARCH_HAS_CPUFREQ
  806. help
  807. Support for ST-Ericsson's Ux500 architecture
  808. config ARCH_NOMADIK
  809. bool "STMicroelectronics Nomadik"
  810. select ARM_AMBA
  811. select ARM_VIC
  812. select CPU_ARM926T
  813. select CLKDEV_LOOKUP
  814. select GENERIC_CLOCKEVENTS
  815. select ARCH_REQUIRE_GPIOLIB
  816. help
  817. Support for the Nomadik platform by ST-Ericsson
  818. config ARCH_DAVINCI
  819. bool "TI DaVinci"
  820. select GENERIC_CLOCKEVENTS
  821. select ARCH_REQUIRE_GPIOLIB
  822. select ZONE_DMA
  823. select HAVE_IDE
  824. select CLKDEV_LOOKUP
  825. select GENERIC_ALLOCATOR
  826. select GENERIC_IRQ_CHIP
  827. select ARCH_HAS_HOLES_MEMORYMODEL
  828. help
  829. Support for TI's DaVinci platform.
  830. config ARCH_OMAP
  831. bool "TI OMAP"
  832. select HAVE_CLK
  833. select ARCH_REQUIRE_GPIOLIB
  834. select ARCH_HAS_CPUFREQ
  835. select CLKSRC_MMIO
  836. select GENERIC_CLOCKEVENTS
  837. select HAVE_SCHED_CLOCK
  838. select ARCH_HAS_HOLES_MEMORYMODEL
  839. help
  840. Support for TI's OMAP platform (OMAP1/2/3/4).
  841. config PLAT_SPEAR
  842. bool "ST SPEAr"
  843. select ARM_AMBA
  844. select ARCH_REQUIRE_GPIOLIB
  845. select CLKDEV_LOOKUP
  846. select CLKSRC_MMIO
  847. select GENERIC_CLOCKEVENTS
  848. select HAVE_CLK
  849. help
  850. Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
  851. config ARCH_VT8500
  852. bool "VIA/WonderMedia 85xx"
  853. select CPU_ARM926T
  854. select GENERIC_GPIO
  855. select ARCH_HAS_CPUFREQ
  856. select GENERIC_CLOCKEVENTS
  857. select ARCH_REQUIRE_GPIOLIB
  858. select HAVE_PWM
  859. help
  860. Support for VIA/WonderMedia VT8500/WM85xx System-on-Chip.
  861. config ARCH_ZYNQ
  862. bool "Xilinx Zynq ARM Cortex A9 Platform"
  863. select CPU_V7
  864. select GENERIC_CLOCKEVENTS
  865. select CLKDEV_LOOKUP
  866. select ARM_GIC
  867. select ARM_AMBA
  868. select ICST
  869. select USE_OF
  870. help
  871. Support for Xilinx Zynq ARM Cortex A9 Platform
  872. endchoice
  873. #
  874. # This is sorted alphabetically by mach-* pathname. However, plat-*
  875. # Kconfigs may be included either alphabetically (according to the
  876. # plat- suffix) or along side the corresponding mach-* source.
  877. #
  878. source "arch/arm/mach-at91/Kconfig"
  879. source "arch/arm/mach-bcmring/Kconfig"
  880. source "arch/arm/mach-clps711x/Kconfig"
  881. source "arch/arm/mach-cns3xxx/Kconfig"
  882. source "arch/arm/mach-davinci/Kconfig"
  883. source "arch/arm/mach-dove/Kconfig"
  884. source "arch/arm/mach-ep93xx/Kconfig"
  885. source "arch/arm/mach-footbridge/Kconfig"
  886. source "arch/arm/mach-gemini/Kconfig"
  887. source "arch/arm/mach-h720x/Kconfig"
  888. source "arch/arm/mach-integrator/Kconfig"
  889. source "arch/arm/mach-iop32x/Kconfig"
  890. source "arch/arm/mach-iop33x/Kconfig"
  891. source "arch/arm/mach-iop13xx/Kconfig"
  892. source "arch/arm/mach-ixp4xx/Kconfig"
  893. source "arch/arm/mach-ixp2000/Kconfig"
  894. source "arch/arm/mach-ixp23xx/Kconfig"
  895. source "arch/arm/mach-kirkwood/Kconfig"
  896. source "arch/arm/mach-ks8695/Kconfig"
  897. source "arch/arm/mach-lpc32xx/Kconfig"
  898. source "arch/arm/mach-msm/Kconfig"
  899. source "arch/arm/mach-mv78xx0/Kconfig"
  900. source "arch/arm/plat-mxc/Kconfig"
  901. source "arch/arm/mach-mxs/Kconfig"
  902. source "arch/arm/mach-netx/Kconfig"
  903. source "arch/arm/mach-nomadik/Kconfig"
  904. source "arch/arm/plat-nomadik/Kconfig"
  905. source "arch/arm/plat-omap/Kconfig"
  906. source "arch/arm/mach-omap1/Kconfig"
  907. source "arch/arm/mach-omap2/Kconfig"
  908. source "arch/arm/mach-orion5x/Kconfig"
  909. source "arch/arm/mach-pxa/Kconfig"
  910. source "arch/arm/plat-pxa/Kconfig"
  911. source "arch/arm/mach-mmp/Kconfig"
  912. source "arch/arm/mach-realview/Kconfig"
  913. source "arch/arm/mach-sa1100/Kconfig"
  914. source "arch/arm/plat-samsung/Kconfig"
  915. source "arch/arm/plat-s3c24xx/Kconfig"
  916. source "arch/arm/plat-s5p/Kconfig"
  917. source "arch/arm/plat-spear/Kconfig"
  918. source "arch/arm/plat-tcc/Kconfig"
  919. if ARCH_S3C2410
  920. source "arch/arm/mach-s3c2410/Kconfig"
  921. source "arch/arm/mach-s3c2412/Kconfig"
  922. source "arch/arm/mach-s3c2416/Kconfig"
  923. source "arch/arm/mach-s3c2440/Kconfig"
  924. source "arch/arm/mach-s3c2443/Kconfig"
  925. endif
  926. if ARCH_S3C64XX
  927. source "arch/arm/mach-s3c64xx/Kconfig"
  928. endif
  929. source "arch/arm/mach-s5p64x0/Kconfig"
  930. source "arch/arm/mach-s5pc100/Kconfig"
  931. source "arch/arm/mach-s5pv210/Kconfig"
  932. source "arch/arm/mach-exynos/Kconfig"
  933. source "arch/arm/mach-shmobile/Kconfig"
  934. source "arch/arm/mach-tegra/Kconfig"
  935. source "arch/arm/mach-u300/Kconfig"
  936. source "arch/arm/mach-ux500/Kconfig"
  937. source "arch/arm/mach-versatile/Kconfig"
  938. source "arch/arm/mach-vexpress/Kconfig"
  939. source "arch/arm/plat-versatile/Kconfig"
  940. source "arch/arm/mach-vt8500/Kconfig"
  941. source "arch/arm/mach-w90x900/Kconfig"
  942. # Definitions to make life easier
  943. config ARCH_ACORN
  944. bool
  945. config PLAT_IOP
  946. bool
  947. select GENERIC_CLOCKEVENTS
  948. select HAVE_SCHED_CLOCK
  949. config PLAT_ORION
  950. bool
  951. select CLKSRC_MMIO
  952. select GENERIC_IRQ_CHIP
  953. select HAVE_SCHED_CLOCK
  954. config PLAT_PXA
  955. bool
  956. config PLAT_VERSATILE
  957. bool
  958. config ARM_TIMER_SP804
  959. bool
  960. select CLKSRC_MMIO
  961. source arch/arm/mm/Kconfig
  962. config IWMMXT
  963. bool "Enable iWMMXt support"
  964. depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
  965. default y if PXA27x || PXA3xx || PXA95x || ARCH_MMP
  966. help
  967. Enable support for iWMMXt context switching at run time if
  968. running on a CPU that supports it.
  969. # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
  970. config XSCALE_PMU
  971. bool
  972. depends on CPU_XSCALE && !XSCALE_PMU_TIMER
  973. default y
  974. config CPU_HAS_PMU
  975. depends on (CPU_V6 || CPU_V6K || CPU_V7 || XSCALE_PMU) && \
  976. (!ARCH_OMAP3 || OMAP3_EMU)
  977. default y
  978. bool
  979. config MULTI_IRQ_HANDLER
  980. bool
  981. help
  982. Allow each machine to specify it's own IRQ handler at run time.
  983. if !MMU
  984. source "arch/arm/Kconfig-nommu"
  985. endif
  986. config ARM_ERRATA_411920
  987. bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
  988. depends on CPU_V6 || CPU_V6K
  989. help
  990. Invalidation of the Instruction Cache operation can
  991. fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
  992. It does not affect the MPCore. This option enables the ARM Ltd.
  993. recommended workaround.
  994. config ARM_ERRATA_430973
  995. bool "ARM errata: Stale prediction on replaced interworking branch"
  996. depends on CPU_V7
  997. help
  998. This option enables the workaround for the 430973 Cortex-A8
  999. (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
  1000. interworking branch is replaced with another code sequence at the
  1001. same virtual address, whether due to self-modifying code or virtual
  1002. to physical address re-mapping, Cortex-A8 does not recover from the
  1003. stale interworking branch prediction. This results in Cortex-A8
  1004. executing the new code sequence in the incorrect ARM or Thumb state.
  1005. The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
  1006. and also flushes the branch target cache at every context switch.
  1007. Note that setting specific bits in the ACTLR register may not be
  1008. available in non-secure mode.
  1009. config ARM_ERRATA_458693
  1010. bool "ARM errata: Processor deadlock when a false hazard is created"
  1011. depends on CPU_V7
  1012. help
  1013. This option enables the workaround for the 458693 Cortex-A8 (r2p0)
  1014. erratum. For very specific sequences of memory operations, it is
  1015. possible for a hazard condition intended for a cache line to instead
  1016. be incorrectly associated with a different cache line. This false
  1017. hazard might then cause a processor deadlock. The workaround enables
  1018. the L1 caching of the NEON accesses and disables the PLD instruction
  1019. in the ACTLR register. Note that setting specific bits in the ACTLR
  1020. register may not be available in non-secure mode.
  1021. config ARM_ERRATA_460075
  1022. bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
  1023. depends on CPU_V7
  1024. help
  1025. This option enables the workaround for the 460075 Cortex-A8 (r2p0)
  1026. erratum. Any asynchronous access to the L2 cache may encounter a
  1027. situation in which recent store transactions to the L2 cache are lost
  1028. and overwritten with stale memory contents from external memory. The
  1029. workaround disables the write-allocate mode for the L2 cache via the
  1030. ACTLR register. Note that setting specific bits in the ACTLR register
  1031. may not be available in non-secure mode.
  1032. config ARM_ERRATA_742230
  1033. bool "ARM errata: DMB operation may be faulty"
  1034. depends on CPU_V7 && SMP
  1035. help
  1036. This option enables the workaround for the 742230 Cortex-A9
  1037. (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
  1038. between two write operations may not ensure the correct visibility
  1039. ordering of the two writes. This workaround sets a specific bit in
  1040. the diagnostic register of the Cortex-A9 which causes the DMB
  1041. instruction to behave as a DSB, ensuring the correct behaviour of
  1042. the two writes.
  1043. config ARM_ERRATA_742231
  1044. bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
  1045. depends on CPU_V7 && SMP
  1046. help
  1047. This option enables the workaround for the 742231 Cortex-A9
  1048. (r2p0..r2p2) erratum. Under certain conditions, specific to the
  1049. Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
  1050. accessing some data located in the same cache line, may get corrupted
  1051. data due to bad handling of the address hazard when the line gets
  1052. replaced from one of the CPUs at the same time as another CPU is
  1053. accessing it. This workaround sets specific bits in the diagnostic
  1054. register of the Cortex-A9 which reduces the linefill issuing
  1055. capabilities of the processor.
  1056. config PL310_ERRATA_588369
  1057. bool "Clean & Invalidate maintenance operations do not invalidate clean lines"
  1058. depends on CACHE_L2X0
  1059. help
  1060. The PL310 L2 cache controller implements three types of Clean &
  1061. Invalidate maintenance operations: by Physical Address
  1062. (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
  1063. They are architecturally defined to behave as the execution of a
  1064. clean operation followed immediately by an invalidate operation,
  1065. both performing to the same memory location. This functionality
  1066. is not correctly implemented in PL310 as clean lines are not
  1067. invalidated as a result of these operations.
  1068. config ARM_ERRATA_720789
  1069. bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
  1070. depends on CPU_V7 && SMP
  1071. help
  1072. This option enables the workaround for the 720789 Cortex-A9 (prior to
  1073. r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
  1074. broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
  1075. As a consequence of this erratum, some TLB entries which should be
  1076. invalidated are not, resulting in an incoherency in the system page
  1077. tables. The workaround changes the TLB flushing routines to invalidate
  1078. entries regardless of the ASID.
  1079. config PL310_ERRATA_727915
  1080. bool "Background Clean & Invalidate by Way operation can cause data corruption"
  1081. depends on CACHE_L2X0
  1082. help
  1083. PL310 implements the Clean & Invalidate by Way L2 cache maintenance
  1084. operation (offset 0x7FC). This operation runs in background so that
  1085. PL310 can handle normal accesses while it is in progress. Under very
  1086. rare circumstances, due to this erratum, write data can be lost when
  1087. PL310 treats a cacheable write transaction during a Clean &
  1088. Invalidate by Way operation.
  1089. config ARM_ERRATA_743622
  1090. bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
  1091. depends on CPU_V7
  1092. help
  1093. This option enables the workaround for the 743622 Cortex-A9
  1094. (r2p0..r2p2) erratum. Under very rare conditions, a faulty
  1095. optimisation in the Cortex-A9 Store Buffer may lead to data
  1096. corruption. This workaround sets a specific bit in the diagnostic
  1097. register of the Cortex-A9 which disables the Store Buffer
  1098. optimisation, preventing the defect from occurring. This has no
  1099. visible impact on the overall performance or power consumption of the
  1100. processor.
  1101. config ARM_ERRATA_751472
  1102. bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
  1103. depends on CPU_V7 && SMP
  1104. help
  1105. This option enables the workaround for the 751472 Cortex-A9 (prior
  1106. to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
  1107. completion of a following broadcasted operation if the second
  1108. operation is received by a CPU before the ICIALLUIS has completed,
  1109. potentially leading to corrupted entries in the cache or TLB.
  1110. config ARM_ERRATA_753970
  1111. bool "ARM errata: cache sync operation may be faulty"
  1112. depends on CACHE_PL310
  1113. help
  1114. This option enables the workaround for the 753970 PL310 (r3p0) erratum.
  1115. Under some condition the effect of cache sync operation on
  1116. the store buffer still remains when the operation completes.
  1117. This means that the store buffer is always asked to drain and
  1118. this prevents it from merging any further writes. The workaround
  1119. is to replace the normal offset of cache sync operation (0x730)
  1120. by another offset targeting an unmapped PL310 register 0x740.
  1121. This has the same effect as the cache sync operation: store buffer
  1122. drain and waiting for all buffers empty.
  1123. config ARM_ERRATA_754322
  1124. bool "ARM errata: possible faulty MMU translations following an ASID switch"
  1125. depends on CPU_V7
  1126. help
  1127. This option enables the workaround for the 754322 Cortex-A9 (r2p*,
  1128. r3p*) erratum. A speculative memory access may cause a page table walk
  1129. which starts prior to an ASID switch but completes afterwards. This
  1130. can populate the micro-TLB with a stale entry which may be hit with
  1131. the new ASID. This workaround places two dsb instructions in the mm
  1132. switching code so that no page table walks can cross the ASID switch.
  1133. config ARM_ERRATA_754327
  1134. bool "ARM errata: no automatic Store Buffer drain"
  1135. depends on CPU_V7 && SMP
  1136. help
  1137. This option enables the workaround for the 754327 Cortex-A9 (prior to
  1138. r2p0) erratum. The Store Buffer does not have any automatic draining
  1139. mechanism and therefore a livelock may occur if an external agent
  1140. continuously polls a memory location waiting to observe an update.
  1141. This workaround defines cpu_relax() as smp_mb(), preventing correctly
  1142. written polling loops from denying visibility of updates to memory.
  1143. config ARM_ERRATA_364296
  1144. bool "ARM errata: Possible cache data corruption with hit-under-miss enabled"
  1145. depends on CPU_V6 && !SMP
  1146. help
  1147. This options enables the workaround for the 364296 ARM1136
  1148. r0p2 erratum (possible cache data corruption with
  1149. hit-under-miss enabled). It sets the undocumented bit 31 in
  1150. the auxiliary control register and the FI bit in the control
  1151. register, thus disabling hit-under-miss without putting the
  1152. processor into full low interrupt latency mode. ARM11MPCore
  1153. is not affected.
  1154. config ARM_ERRATA_764369
  1155. bool "ARM errata: Data cache line maintenance operation by MVA may not succeed"
  1156. depends on CPU_V7 && SMP
  1157. help
  1158. This option enables the workaround for erratum 764369
  1159. affecting Cortex-A9 MPCore with two or more processors (all
  1160. current revisions). Under certain timing circumstances, a data
  1161. cache line maintenance operation by MVA targeting an Inner
  1162. Shareable memory region may fail to proceed up to either the
  1163. Point of Coherency or to the Point of Unification of the
  1164. system. This workaround adds a DSB instruction before the
  1165. relevant cache maintenance functions and sets a specific bit
  1166. in the diagnostic control register of the SCU.
  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. source "kernel/time/Kconfig"
  1219. config SMP
  1220. bool "Symmetric Multi-Processing"
  1221. depends on CPU_V6K || CPU_V7
  1222. depends on GENERIC_CLOCKEVENTS
  1223. depends on REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP || \
  1224. MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || \
  1225. ARCH_EXYNOS4 || ARCH_TEGRA || ARCH_U8500 || ARCH_VEXPRESS_CA9X4 || \
  1226. ARCH_MSM_SCORPIONMP || ARCH_SHMOBILE || ARCH_HIGHBANK || SOC_IMX6Q
  1227. depends on MMU
  1228. select USE_GENERIC_SMP_HELPERS
  1229. select HAVE_ARM_SCU if !ARCH_MSM_SCORPIONMP
  1230. help
  1231. This enables support for systems with more than one CPU. If you have
  1232. a system with only one CPU, like most personal computers, say N. If
  1233. you have a system with more than one CPU, say Y.
  1234. If you say N here, the kernel will run on single and multiprocessor
  1235. machines, but will use only one CPU of a multiprocessor machine. If
  1236. you say Y here, the kernel will run on many, but not all, single
  1237. processor machines. On a single processor machine, the kernel will
  1238. run faster if you say N here.
  1239. See also <file:Documentation/x86/i386/IO-APIC.txt>,
  1240. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  1241. <http://tldp.org/HOWTO/SMP-HOWTO.html>.
  1242. If you don't know what to do here, say N.
  1243. config SMP_ON_UP
  1244. bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
  1245. depends on EXPERIMENTAL
  1246. depends on SMP && !XIP_KERNEL
  1247. default y
  1248. help
  1249. SMP kernels contain instructions which fail on non-SMP processors.
  1250. Enabling this option allows the kernel to modify itself to make
  1251. these instructions safe. Disabling it allows about 1K of space
  1252. savings.
  1253. If you don't know what to do here, say Y.
  1254. config ARM_CPU_TOPOLOGY
  1255. bool "Support cpu topology definition"
  1256. depends on SMP && CPU_V7
  1257. default y
  1258. help
  1259. Support ARM cpu topology definition. The MPIDR register defines
  1260. affinity between processors which is then used to describe the cpu
  1261. topology of an ARM System.
  1262. config SCHED_MC
  1263. bool "Multi-core scheduler support"
  1264. depends on ARM_CPU_TOPOLOGY
  1265. help
  1266. Multi-core scheduler support improves the CPU scheduler's decision
  1267. making when dealing with multi-core CPU chips at a cost of slightly
  1268. increased overhead in some places. If unsure say N here.
  1269. config SCHED_SMT
  1270. bool "SMT scheduler support"
  1271. depends on ARM_CPU_TOPOLOGY
  1272. help
  1273. Improves the CPU scheduler's decision making when dealing with
  1274. MultiThreading at a cost of slightly increased overhead in some
  1275. places. If unsure say N here.
  1276. config HAVE_ARM_SCU
  1277. bool
  1278. help
  1279. This option enables support for the ARM system coherency unit
  1280. config HAVE_ARM_TWD
  1281. bool
  1282. depends on SMP
  1283. select TICK_ONESHOT
  1284. help
  1285. This options enables support for the ARM timer and watchdog unit
  1286. choice
  1287. prompt "Memory split"
  1288. default VMSPLIT_3G
  1289. help
  1290. Select the desired split between kernel and user memory.
  1291. If you are not absolutely sure what you are doing, leave this
  1292. option alone!
  1293. config VMSPLIT_3G
  1294. bool "3G/1G user/kernel split"
  1295. config VMSPLIT_2G
  1296. bool "2G/2G user/kernel split"
  1297. config VMSPLIT_1G
  1298. bool "1G/3G user/kernel split"
  1299. endchoice
  1300. config PAGE_OFFSET
  1301. hex
  1302. default 0x40000000 if VMSPLIT_1G
  1303. default 0x80000000 if VMSPLIT_2G
  1304. default 0xC0000000
  1305. config NR_CPUS
  1306. int "Maximum number of CPUs (2-32)"
  1307. range 2 32
  1308. depends on SMP
  1309. default "4"
  1310. config HOTPLUG_CPU
  1311. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  1312. depends on SMP && HOTPLUG && EXPERIMENTAL
  1313. help
  1314. Say Y here to experiment with turning CPUs off and on. CPUs
  1315. can be controlled through /sys/devices/system/cpu.
  1316. config LOCAL_TIMERS
  1317. bool "Use local timer interrupts"
  1318. depends on SMP
  1319. default y
  1320. select HAVE_ARM_TWD if (!ARCH_MSM_SCORPIONMP && !EXYNOS4_MCT)
  1321. help
  1322. Enable support for local timers on SMP platforms, rather then the
  1323. legacy IPI broadcast method. Local timers allows the system
  1324. accounting to be spread across the timer interval, preventing a
  1325. "thundering herd" at every timer tick.
  1326. source kernel/Kconfig.preempt
  1327. config HZ
  1328. int
  1329. default 200 if ARCH_EBSA110 || ARCH_S3C2410 || ARCH_S5P64X0 || \
  1330. ARCH_S5PV210 || ARCH_EXYNOS4
  1331. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  1332. default AT91_TIMER_HZ if ARCH_AT91
  1333. default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
  1334. default 100
  1335. config THUMB2_KERNEL
  1336. bool "Compile the kernel in Thumb-2 mode (EXPERIMENTAL)"
  1337. depends on CPU_V7 && !CPU_V6 && !CPU_V6K && EXPERIMENTAL
  1338. select AEABI
  1339. select ARM_ASM_UNIFIED
  1340. select ARM_UNWIND
  1341. help
  1342. By enabling this option, the kernel will be compiled in
  1343. Thumb-2 mode. A compiler/assembler that understand the unified
  1344. ARM-Thumb syntax is needed.
  1345. If unsure, say N.
  1346. config THUMB2_AVOID_R_ARM_THM_JUMP11
  1347. bool "Work around buggy Thumb-2 short branch relocations in gas"
  1348. depends on THUMB2_KERNEL && MODULES
  1349. default y
  1350. help
  1351. Various binutils versions can resolve Thumb-2 branches to
  1352. locally-defined, preemptible global symbols as short-range "b.n"
  1353. branch instructions.
  1354. This is a problem, because there's no guarantee the final
  1355. destination of the symbol, or any candidate locations for a
  1356. trampoline, are within range of the branch. For this reason, the
  1357. kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
  1358. relocation in modules at all, and it makes little sense to add
  1359. support.
  1360. The symptom is that the kernel fails with an "unsupported
  1361. relocation" error when loading some modules.
  1362. Until fixed tools are available, passing
  1363. -fno-optimize-sibling-calls to gcc should prevent gcc generating
  1364. code which hits this problem, at the cost of a bit of extra runtime
  1365. stack usage in some cases.
  1366. The problem is described in more detail at:
  1367. https://bugs.launchpad.net/binutils-linaro/+bug/725126
  1368. Only Thumb-2 kernels are affected.
  1369. Unless you are sure your tools don't have this problem, say Y.
  1370. config ARM_ASM_UNIFIED
  1371. bool
  1372. config AEABI
  1373. bool "Use the ARM EABI to compile the kernel"
  1374. help
  1375. This option allows for the kernel to be compiled using the latest
  1376. ARM ABI (aka EABI). This is only useful if you are using a user
  1377. space environment that is also compiled with EABI.
  1378. Since there are major incompatibilities between the legacy ABI and
  1379. EABI, especially with regard to structure member alignment, this
  1380. option also changes the kernel syscall calling convention to
  1381. disambiguate both ABIs and allow for backward compatibility support
  1382. (selected with CONFIG_OABI_COMPAT).
  1383. To use this you need GCC version 4.0.0 or later.
  1384. config OABI_COMPAT
  1385. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  1386. depends on AEABI && EXPERIMENTAL && !THUMB2_KERNEL
  1387. default y
  1388. help
  1389. This option preserves the old syscall interface along with the
  1390. new (ARM EABI) one. It also provides a compatibility layer to
  1391. intercept syscalls that have structure arguments which layout
  1392. in memory differs between the legacy ABI and the new ARM EABI
  1393. (only for non "thumb" binaries). This option adds a tiny
  1394. overhead to all syscalls and produces a slightly larger kernel.
  1395. If you know you'll be using only pure EABI user space then you
  1396. can say N here. If this option is not selected and you attempt
  1397. to execute a legacy ABI binary then the result will be
  1398. UNPREDICTABLE (in fact it can be predicted that it won't work
  1399. at all). If in doubt say Y.
  1400. config ARCH_HAS_HOLES_MEMORYMODEL
  1401. bool
  1402. config ARCH_SPARSEMEM_ENABLE
  1403. bool
  1404. config ARCH_SPARSEMEM_DEFAULT
  1405. def_bool ARCH_SPARSEMEM_ENABLE
  1406. config ARCH_SELECT_MEMORY_MODEL
  1407. def_bool ARCH_SPARSEMEM_ENABLE
  1408. config HAVE_ARCH_PFN_VALID
  1409. def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
  1410. config HIGHMEM
  1411. bool "High Memory Support"
  1412. depends on MMU
  1413. help
  1414. The address space of ARM processors is only 4 Gigabytes large
  1415. and it has to accommodate user address space, kernel address
  1416. space as well as some memory mapped IO. That means that, if you
  1417. have a large amount of physical memory and/or IO, not all of the
  1418. memory can be "permanently mapped" by the kernel. The physical
  1419. memory that is not permanently mapped is called "high memory".
  1420. Depending on the selected kernel/user memory split, minimum
  1421. vmalloc space and actual amount of RAM, you may not need this
  1422. option which should result in a slightly faster kernel.
  1423. If unsure, say n.
  1424. config HIGHPTE
  1425. bool "Allocate 2nd-level pagetables from highmem"
  1426. depends on HIGHMEM
  1427. config HW_PERF_EVENTS
  1428. bool "Enable hardware performance counter support for perf events"
  1429. depends on PERF_EVENTS && CPU_HAS_PMU
  1430. default y
  1431. help
  1432. Enable hardware performance counter support for perf events. If
  1433. disabled, perf events will use software events only.
  1434. source "mm/Kconfig"
  1435. config FORCE_MAX_ZONEORDER
  1436. int "Maximum zone order" if ARCH_SHMOBILE
  1437. range 11 64 if ARCH_SHMOBILE
  1438. default "9" if SA1111
  1439. default "11"
  1440. help
  1441. The kernel memory allocator divides physically contiguous memory
  1442. blocks into "zones", where each zone is a power of two number of
  1443. pages. This option selects the largest power of two that the kernel
  1444. keeps in the memory allocator. If you need to allocate very large
  1445. blocks of physically contiguous memory, then you may need to
  1446. increase this value.
  1447. This config option is actually maximum order plus one. For example,
  1448. a value of 11 means that the largest free memory block is 2^10 pages.
  1449. config LEDS
  1450. bool "Timer and CPU usage LEDs"
  1451. depends on ARCH_CDB89712 || ARCH_EBSA110 || \
  1452. ARCH_EBSA285 || ARCH_INTEGRATOR || \
  1453. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  1454. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  1455. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  1456. ARCH_AT91 || ARCH_DAVINCI || \
  1457. ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
  1458. help
  1459. If you say Y here, the LEDs on your machine will be used
  1460. to provide useful information about your current system status.
  1461. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  1462. be able to select which LEDs are active using the options below. If
  1463. you are compiling a kernel for the EBSA-110 or the LART however, the
  1464. red LED will simply flash regularly to indicate that the system is
  1465. still functional. It is safe to say Y here if you have a CATS
  1466. system, but the driver will do nothing.
  1467. config LEDS_TIMER
  1468. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  1469. OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1470. || MACH_OMAP_PERSEUS2
  1471. depends on LEDS
  1472. depends on !GENERIC_CLOCKEVENTS
  1473. default y if ARCH_EBSA110
  1474. help
  1475. If you say Y here, one of the system LEDs (the green one on the
  1476. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  1477. will flash regularly to indicate that the system is still
  1478. operational. This is mainly useful to kernel hackers who are
  1479. debugging unstable kernels.
  1480. The LART uses the same LED for both Timer LED and CPU usage LED
  1481. functions. You may choose to use both, but the Timer LED function
  1482. will overrule the CPU usage LED.
  1483. config LEDS_CPU
  1484. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  1485. !ARCH_OMAP) \
  1486. || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1487. || MACH_OMAP_PERSEUS2
  1488. depends on LEDS
  1489. help
  1490. If you say Y here, the red LED will be used to give a good real
  1491. time indication of CPU usage, by lighting whenever the idle task
  1492. is not currently executing.
  1493. The LART uses the same LED for both Timer LED and CPU usage LED
  1494. functions. You may choose to use both, but the Timer LED function
  1495. will overrule the CPU usage LED.
  1496. config ALIGNMENT_TRAP
  1497. bool
  1498. depends on CPU_CP15_MMU
  1499. default y if !ARCH_EBSA110
  1500. select HAVE_PROC_CPU if PROC_FS
  1501. help
  1502. ARM processors cannot fetch/store information which is not
  1503. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  1504. address divisible by 4. On 32-bit ARM processors, these non-aligned
  1505. fetch/store instructions will be emulated in software if you say
  1506. here, which has a severe performance impact. This is necessary for
  1507. correct operation of some network protocols. With an IP-only
  1508. configuration it is safe to say N, otherwise say Y.
  1509. config UACCESS_WITH_MEMCPY
  1510. bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
  1511. depends on MMU && EXPERIMENTAL
  1512. default y if CPU_FEROCEON
  1513. help
  1514. Implement faster copy_to_user and clear_user methods for CPU
  1515. cores where a 8-word STM instruction give significantly higher
  1516. memory write throughput than a sequence of individual 32bit stores.
  1517. A possible side effect is a slight increase in scheduling latency
  1518. between threads sharing the same address space if they invoke
  1519. such copy operations with large buffers.
  1520. However, if the CPU data cache is using a write-allocate mode,
  1521. this option is unlikely to provide any performance gain.
  1522. config SECCOMP
  1523. bool
  1524. prompt "Enable seccomp to safely compute untrusted bytecode"
  1525. ---help---
  1526. This kernel feature is useful for number crunching applications
  1527. that may need to compute untrusted bytecode during their
  1528. execution. By using pipes or other transports made available to
  1529. the process as file descriptors supporting the read/write
  1530. syscalls, it's possible to isolate those applications in
  1531. their own address space using seccomp. Once seccomp is
  1532. enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
  1533. and the task is only allowed to execute a few safe syscalls
  1534. defined by each seccomp mode.
  1535. config CC_STACKPROTECTOR
  1536. bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
  1537. depends on EXPERIMENTAL
  1538. help
  1539. This option turns on the -fstack-protector GCC feature. This
  1540. feature puts, at the beginning of functions, a canary value on
  1541. the stack just before the return address, and validates
  1542. the value just before actually returning. Stack based buffer
  1543. overflows (that need to overwrite this return address) now also
  1544. overwrite the canary, which gets detected and the attack is then
  1545. neutralized via a kernel panic.
  1546. This feature requires gcc version 4.2 or above.
  1547. config DEPRECATED_PARAM_STRUCT
  1548. bool "Provide old way to pass kernel parameters"
  1549. help
  1550. This was deprecated in 2001 and announced to live on for 5 years.
  1551. Some old boot loaders still use this way.
  1552. endmenu
  1553. menu "Boot options"
  1554. config USE_OF
  1555. bool "Flattened Device Tree support"
  1556. select OF
  1557. select OF_EARLY_FLATTREE
  1558. select IRQ_DOMAIN
  1559. help
  1560. Include support for flattened device tree machine descriptions.
  1561. # Compressed boot loader in ROM. Yes, we really want to ask about
  1562. # TEXT and BSS so we preserve their values in the config files.
  1563. config ZBOOT_ROM_TEXT
  1564. hex "Compressed ROM boot loader base address"
  1565. default "0"
  1566. help
  1567. The physical address at which the ROM-able zImage is to be
  1568. placed in the target. Platforms which normally make use of
  1569. ROM-able zImage formats normally set this to a suitable
  1570. value in their defconfig file.
  1571. If ZBOOT_ROM is not enabled, this has no effect.
  1572. config ZBOOT_ROM_BSS
  1573. hex "Compressed ROM boot loader BSS address"
  1574. default "0"
  1575. help
  1576. The base address of an area of read/write memory in the target
  1577. for the ROM-able zImage which must be available while the
  1578. decompressor is running. It must be large enough to hold the
  1579. entire decompressed kernel plus an additional 128 KiB.
  1580. Platforms which normally make use of ROM-able zImage formats
  1581. normally set this to a suitable value in their defconfig file.
  1582. If ZBOOT_ROM is not enabled, this has no effect.
  1583. config ZBOOT_ROM
  1584. bool "Compressed boot loader in ROM/flash"
  1585. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  1586. help
  1587. Say Y here if you intend to execute your compressed kernel image
  1588. (zImage) directly from ROM or flash. If unsure, say N.
  1589. choice
  1590. prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)"
  1591. depends on ZBOOT_ROM && ARCH_SH7372 && EXPERIMENTAL
  1592. default ZBOOT_ROM_NONE
  1593. help
  1594. Include experimental SD/MMC loading code in the ROM-able zImage.
  1595. With this enabled it is possible to write the the ROM-able zImage
  1596. kernel image to an MMC or SD card and boot the kernel straight
  1597. from the reset vector. At reset the processor Mask ROM will load
  1598. the first part of the the ROM-able zImage which in turn loads the
  1599. rest the kernel image to RAM.
  1600. config ZBOOT_ROM_NONE
  1601. bool "No SD/MMC loader in zImage (EXPERIMENTAL)"
  1602. help
  1603. Do not load image from SD or MMC
  1604. config ZBOOT_ROM_MMCIF
  1605. bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
  1606. help
  1607. Load image from MMCIF hardware block.
  1608. config ZBOOT_ROM_SH_MOBILE_SDHI
  1609. bool "Include SuperH Mobile SDHI loader in zImage (EXPERIMENTAL)"
  1610. help
  1611. Load image from SDHI hardware block
  1612. endchoice
  1613. config ARM_APPENDED_DTB
  1614. bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
  1615. depends on OF && !ZBOOT_ROM && EXPERIMENTAL
  1616. help
  1617. With this option, the boot code will look for a device tree binary
  1618. (DTB) appended to zImage
  1619. (e.g. cat zImage <filename>.dtb > zImage_w_dtb).
  1620. This is meant as a backward compatibility convenience for those
  1621. systems with a bootloader that can't be upgraded to accommodate
  1622. the documented boot protocol using a device tree.
  1623. Beware that there is very little in terms of protection against
  1624. this option being confused by leftover garbage in memory that might
  1625. look like a DTB header after a reboot if no actual DTB is appended
  1626. to zImage. Do not leave this option active in a production kernel
  1627. if you don't intend to always append a DTB. Proper passing of the
  1628. location into r2 of a bootloader provided DTB is always preferable
  1629. to this option.
  1630. config ARM_ATAG_DTB_COMPAT
  1631. bool "Supplement the appended DTB with traditional ATAG information"
  1632. depends on ARM_APPENDED_DTB
  1633. help
  1634. Some old bootloaders can't be updated to a DTB capable one, yet
  1635. they provide ATAGs with memory configuration, the ramdisk address,
  1636. the kernel cmdline string, etc. Such information is dynamically
  1637. provided by the bootloader and can't always be stored in a static
  1638. DTB. To allow a device tree enabled kernel to be used with such
  1639. bootloaders, this option allows zImage to extract the information
  1640. from the ATAG list and store it at run time into the appended DTB.
  1641. config CMDLINE
  1642. string "Default kernel command string"
  1643. default ""
  1644. help
  1645. On some architectures (EBSA110 and CATS), there is currently no way
  1646. for the boot loader to pass arguments to the kernel. For these
  1647. architectures, you should supply some command-line options at build
  1648. time by entering them here. As a minimum, you should specify the
  1649. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  1650. choice
  1651. prompt "Kernel command line type" if CMDLINE != ""
  1652. default CMDLINE_FROM_BOOTLOADER
  1653. config CMDLINE_FROM_BOOTLOADER
  1654. bool "Use bootloader kernel arguments if available"
  1655. help
  1656. Uses the command-line options passed by the boot loader. If
  1657. the boot loader doesn't provide any, the default kernel command
  1658. string provided in CMDLINE will be used.
  1659. config CMDLINE_EXTEND
  1660. bool "Extend bootloader kernel arguments"
  1661. help
  1662. The command-line arguments provided by the boot loader will be
  1663. appended to the default kernel command string.
  1664. config CMDLINE_FORCE
  1665. bool "Always use the default kernel command string"
  1666. help
  1667. Always use the default kernel command string, even if the boot
  1668. loader passes other arguments to the kernel.
  1669. This is useful if you cannot or don't want to change the
  1670. command-line options your boot loader passes to the kernel.
  1671. endchoice
  1672. config XIP_KERNEL
  1673. bool "Kernel Execute-In-Place from ROM"
  1674. depends on !ZBOOT_ROM
  1675. help
  1676. Execute-In-Place allows the kernel to run from non-volatile storage
  1677. directly addressable by the CPU, such as NOR flash. This saves RAM
  1678. space since the text section of the kernel is not loaded from flash
  1679. to RAM. Read-write sections, such as the data section and stack,
  1680. are still copied to RAM. The XIP kernel is not compressed since
  1681. it has to run directly from flash, so it will take more space to
  1682. store it. The flash address used to link the kernel object files,
  1683. and for storing it, is configuration dependent. Therefore, if you
  1684. say Y here, you must know the proper physical address where to
  1685. store the kernel image depending on your own flash memory usage.
  1686. Also note that the make target becomes "make xipImage" rather than
  1687. "make zImage" or "make Image". The final kernel binary to put in
  1688. ROM memory will be arch/arm/boot/xipImage.
  1689. If unsure, say N.
  1690. config XIP_PHYS_ADDR
  1691. hex "XIP Kernel Physical Location"
  1692. depends on XIP_KERNEL
  1693. default "0x00080000"
  1694. help
  1695. This is the physical address in your flash memory the kernel will
  1696. be linked for and stored to. This address is dependent on your
  1697. own flash usage.
  1698. config KEXEC
  1699. bool "Kexec system call (EXPERIMENTAL)"
  1700. depends on EXPERIMENTAL
  1701. help
  1702. kexec is a system call that implements the ability to shutdown your
  1703. current kernel, and to start another kernel. It is like a reboot
  1704. but it is independent of the system firmware. And like a reboot
  1705. you can start any kernel with it, not just Linux.
  1706. It is an ongoing process to be certain the hardware in a machine
  1707. is properly shutdown, so do not be surprised if this code does not
  1708. initially work for you. It may help to enable device hotplugging
  1709. support.
  1710. config ATAGS_PROC
  1711. bool "Export atags in procfs"
  1712. depends on KEXEC
  1713. default y
  1714. help
  1715. Should the atags used to boot the kernel be exported in an "atags"
  1716. file in procfs. Useful with kexec.
  1717. config CRASH_DUMP
  1718. bool "Build kdump crash kernel (EXPERIMENTAL)"
  1719. depends on EXPERIMENTAL
  1720. help
  1721. Generate crash dump after being started by kexec. This should
  1722. be normally only set in special crash dump kernels which are
  1723. loaded in the main kernel with kexec-tools into a specially
  1724. reserved region and then later executed after a crash by
  1725. kdump/kexec. The crash dump kernel must be compiled to a
  1726. memory address not used by the main kernel
  1727. For more details see Documentation/kdump/kdump.txt
  1728. config AUTO_ZRELADDR
  1729. bool "Auto calculation of the decompressed kernel image address"
  1730. depends on !ZBOOT_ROM && !ARCH_U300
  1731. help
  1732. ZRELADDR is the physical address where the decompressed kernel
  1733. image will be placed. If AUTO_ZRELADDR is selected, the address
  1734. will be determined at run-time by masking the current IP with
  1735. 0xf8000000. This assumes the zImage being placed in the first 128MB
  1736. from start of memory.
  1737. endmenu
  1738. menu "CPU Power Management"
  1739. if ARCH_HAS_CPUFREQ
  1740. source "drivers/cpufreq/Kconfig"
  1741. config CPU_FREQ_IMX
  1742. tristate "CPUfreq driver for i.MX CPUs"
  1743. depends on ARCH_MXC && CPU_FREQ
  1744. help
  1745. This enables the CPUfreq driver for i.MX CPUs.
  1746. config CPU_FREQ_SA1100
  1747. bool
  1748. config CPU_FREQ_SA1110
  1749. bool
  1750. config CPU_FREQ_INTEGRATOR
  1751. tristate "CPUfreq driver for ARM Integrator CPUs"
  1752. depends on ARCH_INTEGRATOR && CPU_FREQ
  1753. default y
  1754. help
  1755. This enables the CPUfreq driver for ARM Integrator CPUs.
  1756. For details, take a look at <file:Documentation/cpu-freq>.
  1757. If in doubt, say Y.
  1758. config CPU_FREQ_PXA
  1759. bool
  1760. depends on CPU_FREQ && ARCH_PXA && PXA25x
  1761. default y
  1762. select CPU_FREQ_TABLE
  1763. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  1764. config CPU_FREQ_S3C
  1765. bool
  1766. help
  1767. Internal configuration node for common cpufreq on Samsung SoC
  1768. config CPU_FREQ_S3C24XX
  1769. bool "CPUfreq driver for Samsung S3C24XX series CPUs (EXPERIMENTAL)"
  1770. depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
  1771. select CPU_FREQ_S3C
  1772. help
  1773. This enables the CPUfreq driver for the Samsung S3C24XX family
  1774. of CPUs.
  1775. For details, take a look at <file:Documentation/cpu-freq>.
  1776. If in doubt, say N.
  1777. config CPU_FREQ_S3C24XX_PLL
  1778. bool "Support CPUfreq changing of PLL frequency (EXPERIMENTAL)"
  1779. depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
  1780. help
  1781. Compile in support for changing the PLL frequency from the
  1782. S3C24XX series CPUfreq driver. The PLL takes time to settle
  1783. after a frequency change, so by default it is not enabled.
  1784. This also means that the PLL tables for the selected CPU(s) will
  1785. be built which may increase the size of the kernel image.
  1786. config CPU_FREQ_S3C24XX_DEBUG
  1787. bool "Debug CPUfreq Samsung driver core"
  1788. depends on CPU_FREQ_S3C24XX
  1789. help
  1790. Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
  1791. config CPU_FREQ_S3C24XX_IODEBUG
  1792. bool "Debug CPUfreq Samsung driver IO timing"
  1793. depends on CPU_FREQ_S3C24XX
  1794. help
  1795. Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
  1796. config CPU_FREQ_S3C24XX_DEBUGFS
  1797. bool "Export debugfs for CPUFreq"
  1798. depends on CPU_FREQ_S3C24XX && DEBUG_FS
  1799. help
  1800. Export status information via debugfs.
  1801. endif
  1802. source "drivers/cpuidle/Kconfig"
  1803. endmenu
  1804. menu "Floating point emulation"
  1805. comment "At least one emulation must be selected"
  1806. config FPE_NWFPE
  1807. bool "NWFPE math emulation"
  1808. depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
  1809. ---help---
  1810. Say Y to include the NWFPE floating point emulator in the kernel.
  1811. This is necessary to run most binaries. Linux does not currently
  1812. support floating point hardware so you need to say Y here even if
  1813. your machine has an FPA or floating point co-processor podule.
  1814. You may say N here if you are going to load the Acorn FPEmulator
  1815. early in the bootup.
  1816. config FPE_NWFPE_XP
  1817. bool "Support extended precision"
  1818. depends on FPE_NWFPE
  1819. help
  1820. Say Y to include 80-bit support in the kernel floating-point
  1821. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  1822. Note that gcc does not generate 80-bit operations by default,
  1823. so in most cases this option only enlarges the size of the
  1824. floating point emulator without any good reason.
  1825. You almost surely want to say N here.
  1826. config FPE_FASTFPE
  1827. bool "FastFPE math emulation (EXPERIMENTAL)"
  1828. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  1829. ---help---
  1830. Say Y here to include the FAST floating point emulator in the kernel.
  1831. This is an experimental much faster emulator which now also has full
  1832. precision for the mantissa. It does not support any exceptions.
  1833. It is very simple, and approximately 3-6 times faster than NWFPE.
  1834. It should be sufficient for most programs. It may be not suitable
  1835. for scientific calculations, but you have to check this for yourself.
  1836. If you do not feel you need a faster FP emulation you should better
  1837. choose NWFPE.
  1838. config VFP
  1839. bool "VFP-format floating point maths"
  1840. depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  1841. help
  1842. Say Y to include VFP support code in the kernel. This is needed
  1843. if your hardware includes a VFP unit.
  1844. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  1845. release notes and additional status information.
  1846. Say N if your target does not have VFP hardware.
  1847. config VFPv3
  1848. bool
  1849. depends on VFP
  1850. default y if CPU_V7
  1851. config NEON
  1852. bool "Advanced SIMD (NEON) Extension support"
  1853. depends on VFPv3 && CPU_V7
  1854. help
  1855. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  1856. Extension.
  1857. endmenu
  1858. menu "Userspace binary formats"
  1859. source "fs/Kconfig.binfmt"
  1860. config ARTHUR
  1861. tristate "RISC OS personality"
  1862. depends on !AEABI
  1863. help
  1864. Say Y here to include the kernel code necessary if you want to run
  1865. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  1866. experimental; if this sounds frightening, say N and sleep in peace.
  1867. You can also say M here to compile this support as a module (which
  1868. will be called arthur).
  1869. endmenu
  1870. menu "Power management options"
  1871. source "kernel/power/Kconfig"
  1872. config ARCH_SUSPEND_POSSIBLE
  1873. depends on !ARCH_S5PC100
  1874. depends on CPU_ARM920T || CPU_ARM926T || CPU_SA1100 || \
  1875. CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE
  1876. def_bool y
  1877. config ARM_CPU_SUSPEND
  1878. def_bool PM_SLEEP
  1879. endmenu
  1880. source "net/Kconfig"
  1881. source "drivers/Kconfig"
  1882. source "fs/Kconfig"
  1883. source "arch/arm/Kconfig.debug"
  1884. source "security/Kconfig"
  1885. source "crypto/Kconfig"
  1886. source "lib/Kconfig"