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 ARCH_BINFMT_ELF_RANDOMIZE_PIE
  20. select HAVE_GENERIC_DMA_COHERENT
  21. select HAVE_KERNEL_GZIP
  22. select HAVE_KERNEL_LZO
  23. select HAVE_KERNEL_LZMA
  24. select HAVE_IRQ_WORK
  25. select HAVE_PERF_EVENTS
  26. select PERF_USE_VMALLOC
  27. select HAVE_REGS_AND_STACK_ACCESS_API
  28. select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7))
  29. select HAVE_C_RECORDMCOUNT
  30. select HAVE_GENERIC_HARDIRQS
  31. select HAVE_SPARSE_IRQ
  32. select GENERIC_IRQ_SHOW
  33. select CPU_PM if (SUSPEND || CPU_IDLE)
  34. select GENERIC_PCI_IOMAP
  35. help
  36. The ARM series is a line of low-power-consumption RISC chip designs
  37. licensed by ARM Ltd and targeted at embedded applications and
  38. handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
  39. manufactured, but legacy ARM-based PC hardware remains popular in
  40. Europe. There is an ARM Linux project with a web page at
  41. <http://www.arm.linux.org.uk/>.
  42. config ARM_HAS_SG_CHAIN
  43. bool
  44. config HAVE_PWM
  45. bool
  46. config MIGHT_HAVE_PCI
  47. bool
  48. config SYS_SUPPORTS_APM_EMULATION
  49. bool
  50. config HAVE_SCHED_CLOCK
  51. bool
  52. config GENERIC_GPIO
  53. bool
  54. config ARCH_USES_GETTIMEOFFSET
  55. bool
  56. default n
  57. config GENERIC_CLOCKEVENTS
  58. bool
  59. config GENERIC_CLOCKEVENTS_BROADCAST
  60. bool
  61. depends on GENERIC_CLOCKEVENTS
  62. default y if SMP
  63. config KTIME_SCALAR
  64. bool
  65. default y
  66. config HAVE_TCM
  67. bool
  68. select GENERIC_ALLOCATOR
  69. config HAVE_PROC_CPU
  70. bool
  71. config NO_IOPORT
  72. bool
  73. config EISA
  74. bool
  75. ---help---
  76. The Extended Industry Standard Architecture (EISA) bus was
  77. developed as an open alternative to the IBM MicroChannel bus.
  78. The EISA bus provided some of the features of the IBM MicroChannel
  79. bus while maintaining backward compatibility with cards made for
  80. the older ISA bus. The EISA bus saw limited use between 1988 and
  81. 1995 when it was made obsolete by the PCI bus.
  82. Say Y here if you are building a kernel for an EISA-based machine.
  83. Otherwise, say N.
  84. config SBUS
  85. bool
  86. config MCA
  87. bool
  88. help
  89. MicroChannel Architecture is found in some IBM PS/2 machines and
  90. laptops. It is a bus system similar to PCI or ISA. See
  91. <file:Documentation/mca.txt> (and especially the web page given
  92. there) before attempting to build an MCA bus kernel.
  93. config STACKTRACE_SUPPORT
  94. bool
  95. default y
  96. config HAVE_LATENCYTOP_SUPPORT
  97. bool
  98. depends on !SMP
  99. default y
  100. config LOCKDEP_SUPPORT
  101. bool
  102. default y
  103. config TRACE_IRQFLAGS_SUPPORT
  104. bool
  105. default y
  106. config HARDIRQS_SW_RESEND
  107. bool
  108. default y
  109. config GENERIC_IRQ_PROBE
  110. bool
  111. default y
  112. config GENERIC_LOCKBREAK
  113. bool
  114. default y
  115. depends on SMP && PREEMPT
  116. config RWSEM_GENERIC_SPINLOCK
  117. bool
  118. default y
  119. config RWSEM_XCHGADD_ALGORITHM
  120. bool
  121. config ARCH_HAS_ILOG2_U32
  122. bool
  123. config ARCH_HAS_ILOG2_U64
  124. bool
  125. config ARCH_HAS_CPUFREQ
  126. bool
  127. help
  128. Internal node to signify that the ARCH has CPUFREQ support
  129. and that the relevant menu configurations are displayed for
  130. it.
  131. config ARCH_HAS_CPU_IDLE_WAIT
  132. def_bool y
  133. config GENERIC_HWEIGHT
  134. bool
  135. default y
  136. config GENERIC_CALIBRATE_DELAY
  137. bool
  138. default y
  139. config ARCH_MAY_HAVE_PC_FDC
  140. bool
  141. config ZONE_DMA
  142. bool
  143. config NEED_DMA_MAP_STATE
  144. def_bool y
  145. config GENERIC_ISA_DMA
  146. bool
  147. config FIQ
  148. bool
  149. config ARCH_MTD_XIP
  150. bool
  151. config VECTORS_BASE
  152. hex
  153. default 0xffff0000 if MMU || CPU_HIGH_VECTOR
  154. default DRAM_BASE if REMAP_VECTORS_TO_RAM
  155. default 0x00000000
  156. help
  157. The base address of exception vectors.
  158. config ARM_PATCH_PHYS_VIRT
  159. bool "Patch physical to virtual translations at runtime" if EMBEDDED
  160. default y
  161. depends on !XIP_KERNEL && MMU
  162. depends on !ARCH_REALVIEW || !SPARSEMEM
  163. help
  164. Patch phys-to-virt and virt-to-phys translation functions at
  165. boot and module load time according to the position of the
  166. kernel in system memory.
  167. This can only be used with non-XIP MMU kernels where the base
  168. of physical memory is at a 16MB boundary.
  169. Only disable this option if you know that you do not require
  170. this feature (eg, building a kernel for a single machine) and
  171. you need to shrink the kernel to the minimal size.
  172. config NEED_MACH_MEMORY_H
  173. bool
  174. help
  175. Select this when mach/memory.h is required to provide special
  176. definitions for this platform. The need for mach/memory.h should
  177. be avoided when possible.
  178. config PHYS_OFFSET
  179. hex "Physical address of main memory" if MMU
  180. depends on !ARM_PATCH_PHYS_VIRT && !NEED_MACH_MEMORY_H
  181. default DRAM_BASE if !MMU
  182. help
  183. Please provide the physical address corresponding to the
  184. location of main memory in your system.
  185. config GENERIC_BUG
  186. def_bool y
  187. depends on BUG
  188. source "init/Kconfig"
  189. source "kernel/Kconfig.freezer"
  190. menu "System Type"
  191. config MMU
  192. bool "MMU-based Paged Memory Management Support"
  193. default y
  194. help
  195. Select if you want MMU-based virtualised addressing space
  196. support by paged memory management. If unsure, say 'Y'.
  197. #
  198. # The "ARM system type" choice list is ordered alphabetically by option
  199. # text. Please add new entries in the option alphabetic order.
  200. #
  201. choice
  202. prompt "ARM system type"
  203. default ARCH_VERSATILE
  204. config ARCH_INTEGRATOR
  205. bool "ARM Ltd. Integrator family"
  206. select ARM_AMBA
  207. select ARCH_HAS_CPUFREQ
  208. select CLKDEV_LOOKUP
  209. select HAVE_MACH_CLKDEV
  210. select HAVE_TCM
  211. select ICST
  212. select GENERIC_CLOCKEVENTS
  213. select PLAT_VERSATILE
  214. select PLAT_VERSATILE_FPGA_IRQ
  215. select NEED_MACH_MEMORY_H
  216. help
  217. Support for ARM's Integrator platform.
  218. config ARCH_REALVIEW
  219. bool "ARM Ltd. RealView family"
  220. select ARM_AMBA
  221. select CLKDEV_LOOKUP
  222. select HAVE_MACH_CLKDEV
  223. select ICST
  224. select GENERIC_CLOCKEVENTS
  225. select ARCH_WANT_OPTIONAL_GPIOLIB
  226. select PLAT_VERSATILE
  227. select PLAT_VERSATILE_CLCD
  228. select ARM_TIMER_SP804
  229. select GPIO_PL061 if GPIOLIB
  230. select NEED_MACH_MEMORY_H
  231. help
  232. This enables support for ARM Ltd RealView boards.
  233. config ARCH_VERSATILE
  234. bool "ARM Ltd. Versatile family"
  235. select ARM_AMBA
  236. select ARM_VIC
  237. select CLKDEV_LOOKUP
  238. select HAVE_MACH_CLKDEV
  239. select ICST
  240. select GENERIC_CLOCKEVENTS
  241. select ARCH_WANT_OPTIONAL_GPIOLIB
  242. select PLAT_VERSATILE
  243. select PLAT_VERSATILE_CLCD
  244. select PLAT_VERSATILE_FPGA_IRQ
  245. select ARM_TIMER_SP804
  246. help
  247. This enables support for ARM Ltd Versatile board.
  248. config ARCH_VEXPRESS
  249. bool "ARM Ltd. Versatile Express family"
  250. select ARCH_WANT_OPTIONAL_GPIOLIB
  251. select ARM_AMBA
  252. select ARM_TIMER_SP804
  253. select CLKDEV_LOOKUP
  254. select HAVE_MACH_CLKDEV
  255. select GENERIC_CLOCKEVENTS
  256. select HAVE_CLK
  257. select HAVE_PATA_PLATFORM
  258. select ICST
  259. select PLAT_VERSATILE
  260. select PLAT_VERSATILE_CLCD
  261. help
  262. This enables support for the ARM Ltd Versatile Express boards.
  263. config ARCH_AT91
  264. bool "Atmel AT91"
  265. select ARCH_REQUIRE_GPIOLIB
  266. select HAVE_CLK
  267. select CLKDEV_LOOKUP
  268. help
  269. This enables support for systems based on the Atmel AT91RM9200,
  270. AT91SAM9 processors.
  271. config ARCH_BCMRING
  272. bool "Broadcom BCMRING"
  273. depends on MMU
  274. select CPU_V6
  275. select ARM_AMBA
  276. select ARM_TIMER_SP804
  277. select CLKDEV_LOOKUP
  278. select GENERIC_CLOCKEVENTS
  279. select ARCH_WANT_OPTIONAL_GPIOLIB
  280. help
  281. Support for Broadcom's BCMRing platform.
  282. config ARCH_HIGHBANK
  283. bool "Calxeda Highbank-based"
  284. select ARCH_WANT_OPTIONAL_GPIOLIB
  285. select ARM_AMBA
  286. select ARM_GIC
  287. select ARM_TIMER_SP804
  288. select CACHE_L2X0
  289. select CLKDEV_LOOKUP
  290. select CPU_V7
  291. select GENERIC_CLOCKEVENTS
  292. select HAVE_ARM_SCU
  293. select HAVE_SMP
  294. select USE_OF
  295. help
  296. Support for the Calxeda Highbank SoC based boards.
  297. config ARCH_CLPS711X
  298. bool "Cirrus Logic CLPS711x/EP721x-based"
  299. select CPU_ARM720T
  300. select ARCH_USES_GETTIMEOFFSET
  301. select NEED_MACH_MEMORY_H
  302. help
  303. Support for Cirrus Logic 711x/721x based boards.
  304. config ARCH_CNS3XXX
  305. bool "Cavium Networks CNS3XXX family"
  306. select CPU_V6K
  307. select GENERIC_CLOCKEVENTS
  308. select ARM_GIC
  309. select MIGHT_HAVE_CACHE_L2X0
  310. select MIGHT_HAVE_PCI
  311. select PCI_DOMAINS if PCI
  312. help
  313. Support for Cavium Networks CNS3XXX platform.
  314. config ARCH_GEMINI
  315. bool "Cortina Systems Gemini"
  316. select CPU_FA526
  317. select ARCH_REQUIRE_GPIOLIB
  318. select ARCH_USES_GETTIMEOFFSET
  319. help
  320. Support for the Cortina Systems Gemini family SoCs
  321. config ARCH_PRIMA2
  322. bool "CSR SiRFSoC PRIMA2 ARM Cortex A9 Platform"
  323. select CPU_V7
  324. select NO_IOPORT
  325. select GENERIC_CLOCKEVENTS
  326. select CLKDEV_LOOKUP
  327. select GENERIC_IRQ_CHIP
  328. select MIGHT_HAVE_CACHE_L2X0
  329. select USE_OF
  330. select ZONE_DMA
  331. help
  332. Support for CSR SiRFSoC ARM Cortex A9 Platform
  333. config ARCH_EBSA110
  334. bool "EBSA-110"
  335. select CPU_SA110
  336. select ISA
  337. select NO_IOPORT
  338. select ARCH_USES_GETTIMEOFFSET
  339. select NEED_MACH_MEMORY_H
  340. help
  341. This is an evaluation board for the StrongARM processor available
  342. from Digital. It has limited hardware on-board, including an
  343. Ethernet interface, two PCMCIA sockets, two serial ports and a
  344. parallel port.
  345. config ARCH_EP93XX
  346. bool "EP93xx-based"
  347. select CPU_ARM920T
  348. select ARM_AMBA
  349. select ARM_VIC
  350. select CLKDEV_LOOKUP
  351. select ARCH_REQUIRE_GPIOLIB
  352. select ARCH_HAS_HOLES_MEMORYMODEL
  353. select ARCH_USES_GETTIMEOFFSET
  354. select NEED_MACH_MEMORY_H
  355. help
  356. This enables support for the Cirrus EP93xx series of CPUs.
  357. config ARCH_FOOTBRIDGE
  358. bool "FootBridge"
  359. select CPU_SA110
  360. select FOOTBRIDGE
  361. select GENERIC_CLOCKEVENTS
  362. select HAVE_IDE
  363. select NEED_MACH_MEMORY_H
  364. help
  365. Support for systems based on the DC21285 companion chip
  366. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  367. config ARCH_MXC
  368. bool "Freescale MXC/iMX-based"
  369. select GENERIC_CLOCKEVENTS
  370. select ARCH_REQUIRE_GPIOLIB
  371. select CLKDEV_LOOKUP
  372. select CLKSRC_MMIO
  373. select GENERIC_IRQ_CHIP
  374. select HAVE_SCHED_CLOCK
  375. select MULTI_IRQ_HANDLER
  376. help
  377. Support for Freescale MXC/iMX-based family of processors
  378. config ARCH_MXS
  379. bool "Freescale MXS-based"
  380. select GENERIC_CLOCKEVENTS
  381. select ARCH_REQUIRE_GPIOLIB
  382. select CLKDEV_LOOKUP
  383. select CLKSRC_MMIO
  384. select HAVE_CLK_PREPARE
  385. help
  386. Support for Freescale MXS-based family of processors
  387. config ARCH_NETX
  388. bool "Hilscher NetX based"
  389. select CLKSRC_MMIO
  390. select CPU_ARM926T
  391. select ARM_VIC
  392. select GENERIC_CLOCKEVENTS
  393. help
  394. This enables support for systems based on the Hilscher NetX Soc
  395. config ARCH_H720X
  396. bool "Hynix HMS720x-based"
  397. select CPU_ARM720T
  398. select ISA_DMA_API
  399. select ARCH_USES_GETTIMEOFFSET
  400. help
  401. This enables support for systems based on the Hynix HMS720x
  402. config ARCH_IOP13XX
  403. bool "IOP13xx-based"
  404. depends on MMU
  405. select CPU_XSC3
  406. select PLAT_IOP
  407. select PCI
  408. select ARCH_SUPPORTS_MSI
  409. select VMSPLIT_1G
  410. select NEED_MACH_MEMORY_H
  411. help
  412. Support for Intel's IOP13XX (XScale) family of processors.
  413. config ARCH_IOP32X
  414. bool "IOP32x-based"
  415. depends on MMU
  416. select CPU_XSCALE
  417. select PLAT_IOP
  418. select PCI
  419. select ARCH_REQUIRE_GPIOLIB
  420. help
  421. Support for Intel's 80219 and IOP32X (XScale) family of
  422. processors.
  423. config ARCH_IOP33X
  424. bool "IOP33x-based"
  425. depends on MMU
  426. select CPU_XSCALE
  427. select PLAT_IOP
  428. select PCI
  429. select ARCH_REQUIRE_GPIOLIB
  430. help
  431. Support for Intel's IOP33X (XScale) family of processors.
  432. config ARCH_IXP23XX
  433. bool "IXP23XX-based"
  434. depends on MMU
  435. select CPU_XSC3
  436. select PCI
  437. select ARCH_USES_GETTIMEOFFSET
  438. select NEED_MACH_MEMORY_H
  439. help
  440. Support for Intel's IXP23xx (XScale) family of processors.
  441. config ARCH_IXP2000
  442. bool "IXP2400/2800-based"
  443. depends on MMU
  444. select CPU_XSCALE
  445. select PCI
  446. select ARCH_USES_GETTIMEOFFSET
  447. select NEED_MACH_MEMORY_H
  448. help
  449. Support for Intel's IXP2400/2800 (XScale) family of processors.
  450. config ARCH_IXP4XX
  451. bool "IXP4xx-based"
  452. depends on MMU
  453. select CLKSRC_MMIO
  454. select CPU_XSCALE
  455. select GENERIC_GPIO
  456. select GENERIC_CLOCKEVENTS
  457. select HAVE_SCHED_CLOCK
  458. select MIGHT_HAVE_PCI
  459. select DMABOUNCE if PCI
  460. help
  461. Support for Intel's IXP4XX (XScale) family of processors.
  462. config ARCH_DOVE
  463. bool "Marvell Dove"
  464. select CPU_V7
  465. select PCI
  466. select ARCH_REQUIRE_GPIOLIB
  467. select GENERIC_CLOCKEVENTS
  468. select PLAT_ORION
  469. help
  470. Support for the Marvell Dove SoC 88AP510
  471. config ARCH_KIRKWOOD
  472. bool "Marvell Kirkwood"
  473. select CPU_FEROCEON
  474. select PCI
  475. select ARCH_REQUIRE_GPIOLIB
  476. select GENERIC_CLOCKEVENTS
  477. select PLAT_ORION
  478. help
  479. Support for the following Marvell Kirkwood series SoCs:
  480. 88F6180, 88F6192 and 88F6281.
  481. config ARCH_LPC32XX
  482. bool "NXP LPC32XX"
  483. select CLKSRC_MMIO
  484. select CPU_ARM926T
  485. select ARCH_REQUIRE_GPIOLIB
  486. select HAVE_IDE
  487. select ARM_AMBA
  488. select USB_ARCH_HAS_OHCI
  489. select CLKDEV_LOOKUP
  490. select GENERIC_CLOCKEVENTS
  491. help
  492. Support for the NXP LPC32XX family of processors
  493. config ARCH_MV78XX0
  494. bool "Marvell MV78xx0"
  495. select CPU_FEROCEON
  496. select PCI
  497. select ARCH_REQUIRE_GPIOLIB
  498. select GENERIC_CLOCKEVENTS
  499. select PLAT_ORION
  500. help
  501. Support for the following Marvell MV78xx0 series SoCs:
  502. MV781x0, MV782x0.
  503. config ARCH_ORION5X
  504. bool "Marvell Orion"
  505. depends on MMU
  506. select CPU_FEROCEON
  507. select PCI
  508. select ARCH_REQUIRE_GPIOLIB
  509. select GENERIC_CLOCKEVENTS
  510. select PLAT_ORION
  511. help
  512. Support for the following Marvell Orion 5x series SoCs:
  513. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  514. Orion-2 (5281), Orion-1-90 (6183).
  515. config ARCH_MMP
  516. bool "Marvell PXA168/910/MMP2"
  517. depends on MMU
  518. select ARCH_REQUIRE_GPIOLIB
  519. select CLKDEV_LOOKUP
  520. select GENERIC_CLOCKEVENTS
  521. select GPIO_PXA
  522. select HAVE_SCHED_CLOCK
  523. select TICK_ONESHOT
  524. select PLAT_PXA
  525. select SPARSE_IRQ
  526. select GENERIC_ALLOCATOR
  527. help
  528. Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
  529. config ARCH_KS8695
  530. bool "Micrel/Kendin KS8695"
  531. select CPU_ARM922T
  532. select ARCH_REQUIRE_GPIOLIB
  533. select ARCH_USES_GETTIMEOFFSET
  534. select NEED_MACH_MEMORY_H
  535. help
  536. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  537. System-on-Chip devices.
  538. config ARCH_W90X900
  539. bool "Nuvoton W90X900 CPU"
  540. select CPU_ARM926T
  541. select ARCH_REQUIRE_GPIOLIB
  542. select CLKDEV_LOOKUP
  543. select CLKSRC_MMIO
  544. select GENERIC_CLOCKEVENTS
  545. help
  546. Support for Nuvoton (Winbond logic dept.) ARM9 processor,
  547. At present, the w90x900 has been renamed nuc900, regarding
  548. the ARM series product line, you can login the following
  549. link address to know more.
  550. <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
  551. ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
  552. config ARCH_TEGRA
  553. bool "NVIDIA Tegra"
  554. select CLKDEV_LOOKUP
  555. select CLKSRC_MMIO
  556. select GENERIC_CLOCKEVENTS
  557. select GENERIC_GPIO
  558. select HAVE_CLK
  559. select HAVE_SCHED_CLOCK
  560. select HAVE_SMP
  561. select MIGHT_HAVE_CACHE_L2X0
  562. select ARCH_HAS_CPUFREQ
  563. help
  564. This enables support for NVIDIA Tegra based systems (Tegra APX,
  565. Tegra 6xx and Tegra 2 series).
  566. config ARCH_PICOXCELL
  567. bool "Picochip picoXcell"
  568. select ARCH_REQUIRE_GPIOLIB
  569. select ARM_PATCH_PHYS_VIRT
  570. select ARM_VIC
  571. select CPU_V6K
  572. select DW_APB_TIMER
  573. select GENERIC_CLOCKEVENTS
  574. select GENERIC_GPIO
  575. select HAVE_SCHED_CLOCK
  576. select HAVE_TCM
  577. select NO_IOPORT
  578. select SPARSE_IRQ
  579. select USE_OF
  580. help
  581. This enables support for systems based on the Picochip picoXcell
  582. family of Femtocell devices. The picoxcell support requires device tree
  583. for all boards.
  584. config ARCH_PNX4008
  585. bool "Philips Nexperia PNX4008 Mobile"
  586. select CPU_ARM926T
  587. select CLKDEV_LOOKUP
  588. select ARCH_USES_GETTIMEOFFSET
  589. help
  590. This enables support for Philips PNX4008 mobile platform.
  591. config ARCH_PXA
  592. bool "PXA2xx/PXA3xx-based"
  593. depends on MMU
  594. select ARCH_MTD_XIP
  595. select ARCH_HAS_CPUFREQ
  596. select CLKDEV_LOOKUP
  597. select CLKSRC_MMIO
  598. select ARCH_REQUIRE_GPIOLIB
  599. select GENERIC_CLOCKEVENTS
  600. select GPIO_PXA
  601. select HAVE_SCHED_CLOCK
  602. select TICK_ONESHOT
  603. select PLAT_PXA
  604. select SPARSE_IRQ
  605. select AUTO_ZRELADDR
  606. select MULTI_IRQ_HANDLER
  607. select ARM_CPU_SUSPEND if PM
  608. select HAVE_IDE
  609. help
  610. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  611. config ARCH_MSM
  612. bool "Qualcomm MSM"
  613. select HAVE_CLK
  614. select GENERIC_CLOCKEVENTS
  615. select ARCH_REQUIRE_GPIOLIB
  616. select CLKDEV_LOOKUP
  617. help
  618. Support for Qualcomm MSM/QSD based systems. This runs on the
  619. apps processor of the MSM/QSD and depends on a shared memory
  620. interface to the modem processor which runs the baseband
  621. stack and controls some vital subsystems
  622. (clock and power control, etc).
  623. config ARCH_SHMOBILE
  624. bool "Renesas SH-Mobile / R-Mobile"
  625. select HAVE_CLK
  626. select CLKDEV_LOOKUP
  627. select HAVE_MACH_CLKDEV
  628. select HAVE_SMP
  629. select GENERIC_CLOCKEVENTS
  630. select MIGHT_HAVE_CACHE_L2X0
  631. select NO_IOPORT
  632. select SPARSE_IRQ
  633. select MULTI_IRQ_HANDLER
  634. select PM_GENERIC_DOMAINS if PM
  635. select NEED_MACH_MEMORY_H
  636. help
  637. Support for Renesas's SH-Mobile and R-Mobile ARM platforms.
  638. config ARCH_RPC
  639. bool "RiscPC"
  640. select ARCH_ACORN
  641. select FIQ
  642. select TIMER_ACORN
  643. select ARCH_MAY_HAVE_PC_FDC
  644. select HAVE_PATA_PLATFORM
  645. select ISA_DMA_API
  646. select NO_IOPORT
  647. select ARCH_SPARSEMEM_ENABLE
  648. select ARCH_USES_GETTIMEOFFSET
  649. select HAVE_IDE
  650. select NEED_MACH_MEMORY_H
  651. help
  652. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  653. CD-ROM interface, serial and parallel port, and the floppy drive.
  654. config ARCH_SA1100
  655. bool "SA1100-based"
  656. select CLKSRC_MMIO
  657. select CPU_SA1100
  658. select ISA
  659. select ARCH_SPARSEMEM_ENABLE
  660. select ARCH_MTD_XIP
  661. select ARCH_HAS_CPUFREQ
  662. select CPU_FREQ
  663. select GENERIC_CLOCKEVENTS
  664. select CLKDEV_LOOKUP
  665. select HAVE_SCHED_CLOCK
  666. select TICK_ONESHOT
  667. select ARCH_REQUIRE_GPIOLIB
  668. select HAVE_IDE
  669. select NEED_MACH_MEMORY_H
  670. help
  671. Support for StrongARM 11x0 based boards.
  672. config ARCH_S3C2410
  673. bool "Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443, S3C2450"
  674. select GENERIC_GPIO
  675. select ARCH_HAS_CPUFREQ
  676. select HAVE_CLK
  677. select CLKDEV_LOOKUP
  678. select ARCH_USES_GETTIMEOFFSET
  679. select HAVE_S3C2410_I2C if I2C
  680. help
  681. Samsung S3C2410X CPU based systems, such as the Simtec Electronics
  682. BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
  683. the Samsung SMDK2410 development board (and derivatives).
  684. Note, the S3C2416 and the S3C2450 are so close that they even share
  685. the same SoC ID code. This means that there is no separate machine
  686. directory (no arch/arm/mach-s3c2450) as the S3C2416 was first.
  687. config ARCH_S3C64XX
  688. bool "Samsung S3C64XX"
  689. select PLAT_SAMSUNG
  690. select CPU_V6
  691. select ARM_VIC
  692. select HAVE_CLK
  693. select HAVE_TCM
  694. select CLKDEV_LOOKUP
  695. select NO_IOPORT
  696. select ARCH_USES_GETTIMEOFFSET
  697. select ARCH_HAS_CPUFREQ
  698. select ARCH_REQUIRE_GPIOLIB
  699. select SAMSUNG_CLKSRC
  700. select SAMSUNG_IRQ_VIC_TIMER
  701. select S3C_GPIO_TRACK
  702. select S3C_DEV_NAND
  703. select USB_ARCH_HAS_OHCI
  704. select SAMSUNG_GPIOLIB_4BIT
  705. select HAVE_S3C2410_I2C if I2C
  706. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  707. help
  708. Samsung S3C64XX series based systems
  709. config ARCH_S5P64X0
  710. bool "Samsung S5P6440 S5P6450"
  711. select CPU_V6
  712. select GENERIC_GPIO
  713. select HAVE_CLK
  714. select CLKDEV_LOOKUP
  715. select CLKSRC_MMIO
  716. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  717. select GENERIC_CLOCKEVENTS
  718. select HAVE_SCHED_CLOCK
  719. select HAVE_S3C2410_I2C if I2C
  720. select HAVE_S3C_RTC if RTC_CLASS
  721. help
  722. Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
  723. SMDK6450.
  724. config ARCH_S5PC100
  725. bool "Samsung S5PC100"
  726. select GENERIC_GPIO
  727. select HAVE_CLK
  728. select CLKDEV_LOOKUP
  729. select CPU_V7
  730. select ARCH_USES_GETTIMEOFFSET
  731. select HAVE_S3C2410_I2C if I2C
  732. select HAVE_S3C_RTC if RTC_CLASS
  733. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  734. help
  735. Samsung S5PC100 series based systems
  736. config ARCH_S5PV210
  737. bool "Samsung S5PV210/S5PC110"
  738. select CPU_V7
  739. select ARCH_SPARSEMEM_ENABLE
  740. select ARCH_HAS_HOLES_MEMORYMODEL
  741. select GENERIC_GPIO
  742. select HAVE_CLK
  743. select CLKDEV_LOOKUP
  744. select CLKSRC_MMIO
  745. select ARCH_HAS_CPUFREQ
  746. select GENERIC_CLOCKEVENTS
  747. select HAVE_SCHED_CLOCK
  748. select HAVE_S3C2410_I2C if I2C
  749. select HAVE_S3C_RTC if RTC_CLASS
  750. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  751. select NEED_MACH_MEMORY_H
  752. help
  753. Samsung S5PV210/S5PC110 series based systems
  754. config ARCH_EXYNOS
  755. bool "SAMSUNG EXYNOS"
  756. select CPU_V7
  757. select ARCH_SPARSEMEM_ENABLE
  758. select ARCH_HAS_HOLES_MEMORYMODEL
  759. select GENERIC_GPIO
  760. select HAVE_CLK
  761. select CLKDEV_LOOKUP
  762. select ARCH_HAS_CPUFREQ
  763. select GENERIC_CLOCKEVENTS
  764. select HAVE_S3C_RTC if RTC_CLASS
  765. select HAVE_S3C2410_I2C if I2C
  766. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  767. select NEED_MACH_MEMORY_H
  768. help
  769. Support for SAMSUNG's EXYNOS SoCs (EXYNOS4/5)
  770. config ARCH_SHARK
  771. bool "Shark"
  772. select CPU_SA110
  773. select ISA
  774. select ISA_DMA
  775. select ZONE_DMA
  776. select PCI
  777. select ARCH_USES_GETTIMEOFFSET
  778. select NEED_MACH_MEMORY_H
  779. help
  780. Support for the StrongARM based Digital DNARD machine, also known
  781. as "Shark" (<http://www.shark-linux.de/shark.html>).
  782. config ARCH_U300
  783. bool "ST-Ericsson U300 Series"
  784. depends on MMU
  785. select CLKSRC_MMIO
  786. select CPU_ARM926T
  787. select HAVE_SCHED_CLOCK
  788. select HAVE_TCM
  789. select ARM_AMBA
  790. select ARM_PATCH_PHYS_VIRT
  791. select ARM_VIC
  792. select GENERIC_CLOCKEVENTS
  793. select CLKDEV_LOOKUP
  794. select HAVE_MACH_CLKDEV
  795. select GENERIC_GPIO
  796. select ARCH_REQUIRE_GPIOLIB
  797. help
  798. Support for ST-Ericsson U300 series mobile platforms.
  799. config ARCH_U8500
  800. bool "ST-Ericsson U8500 Series"
  801. depends on MMU
  802. select CPU_V7
  803. select ARM_AMBA
  804. select GENERIC_CLOCKEVENTS
  805. select CLKDEV_LOOKUP
  806. select ARCH_REQUIRE_GPIOLIB
  807. select ARCH_HAS_CPUFREQ
  808. select HAVE_SMP
  809. select MIGHT_HAVE_CACHE_L2X0
  810. help
  811. Support for ST-Ericsson's Ux500 architecture
  812. config ARCH_NOMADIK
  813. bool "STMicroelectronics Nomadik"
  814. select ARM_AMBA
  815. select ARM_VIC
  816. select CPU_ARM926T
  817. select CLKDEV_LOOKUP
  818. select GENERIC_CLOCKEVENTS
  819. select MIGHT_HAVE_CACHE_L2X0
  820. select ARCH_REQUIRE_GPIOLIB
  821. help
  822. Support for the Nomadik platform by ST-Ericsson
  823. config ARCH_DAVINCI
  824. bool "TI DaVinci"
  825. select GENERIC_CLOCKEVENTS
  826. select ARCH_REQUIRE_GPIOLIB
  827. select ZONE_DMA
  828. select HAVE_IDE
  829. select CLKDEV_LOOKUP
  830. select GENERIC_ALLOCATOR
  831. select GENERIC_IRQ_CHIP
  832. select ARCH_HAS_HOLES_MEMORYMODEL
  833. help
  834. Support for TI's DaVinci platform.
  835. config ARCH_OMAP
  836. bool "TI OMAP"
  837. select HAVE_CLK
  838. select ARCH_REQUIRE_GPIOLIB
  839. select ARCH_HAS_CPUFREQ
  840. select CLKSRC_MMIO
  841. select GENERIC_CLOCKEVENTS
  842. select HAVE_SCHED_CLOCK
  843. select ARCH_HAS_HOLES_MEMORYMODEL
  844. help
  845. Support for TI's OMAP platform (OMAP1/2/3/4).
  846. config PLAT_SPEAR
  847. bool "ST SPEAr"
  848. select ARM_AMBA
  849. select ARCH_REQUIRE_GPIOLIB
  850. select CLKDEV_LOOKUP
  851. select CLKSRC_MMIO
  852. select GENERIC_CLOCKEVENTS
  853. select HAVE_CLK
  854. help
  855. Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
  856. config ARCH_VT8500
  857. bool "VIA/WonderMedia 85xx"
  858. select CPU_ARM926T
  859. select GENERIC_GPIO
  860. select ARCH_HAS_CPUFREQ
  861. select GENERIC_CLOCKEVENTS
  862. select ARCH_REQUIRE_GPIOLIB
  863. select HAVE_PWM
  864. help
  865. Support for VIA/WonderMedia VT8500/WM85xx System-on-Chip.
  866. config ARCH_ZYNQ
  867. bool "Xilinx Zynq ARM Cortex A9 Platform"
  868. select CPU_V7
  869. select GENERIC_CLOCKEVENTS
  870. select CLKDEV_LOOKUP
  871. select ARM_GIC
  872. select ARM_AMBA
  873. select ICST
  874. select MIGHT_HAVE_CACHE_L2X0
  875. select USE_OF
  876. help
  877. Support for Xilinx Zynq ARM Cortex A9 Platform
  878. endchoice
  879. #
  880. # This is sorted alphabetically by mach-* pathname. However, plat-*
  881. # Kconfigs may be included either alphabetically (according to the
  882. # plat- suffix) or along side the corresponding mach-* source.
  883. #
  884. source "arch/arm/mach-at91/Kconfig"
  885. source "arch/arm/mach-bcmring/Kconfig"
  886. source "arch/arm/mach-clps711x/Kconfig"
  887. source "arch/arm/mach-cns3xxx/Kconfig"
  888. source "arch/arm/mach-davinci/Kconfig"
  889. source "arch/arm/mach-dove/Kconfig"
  890. source "arch/arm/mach-ep93xx/Kconfig"
  891. source "arch/arm/mach-footbridge/Kconfig"
  892. source "arch/arm/mach-gemini/Kconfig"
  893. source "arch/arm/mach-h720x/Kconfig"
  894. source "arch/arm/mach-integrator/Kconfig"
  895. source "arch/arm/mach-iop32x/Kconfig"
  896. source "arch/arm/mach-iop33x/Kconfig"
  897. source "arch/arm/mach-iop13xx/Kconfig"
  898. source "arch/arm/mach-ixp4xx/Kconfig"
  899. source "arch/arm/mach-ixp2000/Kconfig"
  900. source "arch/arm/mach-ixp23xx/Kconfig"
  901. source "arch/arm/mach-kirkwood/Kconfig"
  902. source "arch/arm/mach-ks8695/Kconfig"
  903. source "arch/arm/mach-lpc32xx/Kconfig"
  904. source "arch/arm/mach-msm/Kconfig"
  905. source "arch/arm/mach-mv78xx0/Kconfig"
  906. source "arch/arm/plat-mxc/Kconfig"
  907. source "arch/arm/mach-mxs/Kconfig"
  908. source "arch/arm/mach-netx/Kconfig"
  909. source "arch/arm/mach-nomadik/Kconfig"
  910. source "arch/arm/plat-nomadik/Kconfig"
  911. source "arch/arm/plat-omap/Kconfig"
  912. source "arch/arm/mach-omap1/Kconfig"
  913. source "arch/arm/mach-omap2/Kconfig"
  914. source "arch/arm/mach-orion5x/Kconfig"
  915. source "arch/arm/mach-pxa/Kconfig"
  916. source "arch/arm/plat-pxa/Kconfig"
  917. source "arch/arm/mach-mmp/Kconfig"
  918. source "arch/arm/mach-realview/Kconfig"
  919. source "arch/arm/mach-sa1100/Kconfig"
  920. source "arch/arm/plat-samsung/Kconfig"
  921. source "arch/arm/plat-s3c24xx/Kconfig"
  922. source "arch/arm/plat-s5p/Kconfig"
  923. source "arch/arm/plat-spear/Kconfig"
  924. if ARCH_S3C2410
  925. source "arch/arm/mach-s3c2410/Kconfig"
  926. source "arch/arm/mach-s3c2412/Kconfig"
  927. source "arch/arm/mach-s3c2416/Kconfig"
  928. source "arch/arm/mach-s3c2440/Kconfig"
  929. source "arch/arm/mach-s3c2443/Kconfig"
  930. endif
  931. if ARCH_S3C64XX
  932. source "arch/arm/mach-s3c64xx/Kconfig"
  933. endif
  934. source "arch/arm/mach-s5p64x0/Kconfig"
  935. source "arch/arm/mach-s5pc100/Kconfig"
  936. source "arch/arm/mach-s5pv210/Kconfig"
  937. source "arch/arm/mach-exynos/Kconfig"
  938. source "arch/arm/mach-shmobile/Kconfig"
  939. source "arch/arm/mach-tegra/Kconfig"
  940. source "arch/arm/mach-u300/Kconfig"
  941. source "arch/arm/mach-ux500/Kconfig"
  942. source "arch/arm/mach-versatile/Kconfig"
  943. source "arch/arm/mach-vexpress/Kconfig"
  944. source "arch/arm/plat-versatile/Kconfig"
  945. source "arch/arm/mach-vt8500/Kconfig"
  946. source "arch/arm/mach-w90x900/Kconfig"
  947. # Definitions to make life easier
  948. config ARCH_ACORN
  949. bool
  950. config PLAT_IOP
  951. bool
  952. select GENERIC_CLOCKEVENTS
  953. select HAVE_SCHED_CLOCK
  954. config PLAT_ORION
  955. bool
  956. select CLKSRC_MMIO
  957. select GENERIC_IRQ_CHIP
  958. select HAVE_SCHED_CLOCK
  959. config PLAT_PXA
  960. bool
  961. config PLAT_VERSATILE
  962. bool
  963. config ARM_TIMER_SP804
  964. bool
  965. select CLKSRC_MMIO
  966. source arch/arm/mm/Kconfig
  967. config ARM_NR_BANKS
  968. int
  969. default 16 if ARCH_EP93XX
  970. default 8
  971. config IWMMXT
  972. bool "Enable iWMMXt support"
  973. depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
  974. default y if PXA27x || PXA3xx || PXA95x || ARCH_MMP
  975. help
  976. Enable support for iWMMXt context switching at run time if
  977. running on a CPU that supports it.
  978. config XSCALE_PMU
  979. bool
  980. depends on CPU_XSCALE
  981. default y
  982. config CPU_HAS_PMU
  983. depends on (CPU_V6 || CPU_V6K || CPU_V7 || XSCALE_PMU) && \
  984. (!ARCH_OMAP3 || OMAP3_EMU)
  985. default y
  986. bool
  987. config MULTI_IRQ_HANDLER
  988. bool
  989. help
  990. Allow each machine to specify it's own IRQ handler at run time.
  991. if !MMU
  992. source "arch/arm/Kconfig-nommu"
  993. endif
  994. config ARM_ERRATA_411920
  995. bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
  996. depends on CPU_V6 || CPU_V6K
  997. help
  998. Invalidation of the Instruction Cache operation can
  999. fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
  1000. It does not affect the MPCore. This option enables the ARM Ltd.
  1001. recommended workaround.
  1002. config ARM_ERRATA_430973
  1003. bool "ARM errata: Stale prediction on replaced interworking branch"
  1004. depends on CPU_V7
  1005. help
  1006. This option enables the workaround for the 430973 Cortex-A8
  1007. (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
  1008. interworking branch is replaced with another code sequence at the
  1009. same virtual address, whether due to self-modifying code or virtual
  1010. to physical address re-mapping, Cortex-A8 does not recover from the
  1011. stale interworking branch prediction. This results in Cortex-A8
  1012. executing the new code sequence in the incorrect ARM or Thumb state.
  1013. The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
  1014. and also flushes the branch target cache at every context switch.
  1015. Note that setting specific bits in the ACTLR register may not be
  1016. available in non-secure mode.
  1017. config ARM_ERRATA_458693
  1018. bool "ARM errata: Processor deadlock when a false hazard is created"
  1019. depends on CPU_V7
  1020. help
  1021. This option enables the workaround for the 458693 Cortex-A8 (r2p0)
  1022. erratum. For very specific sequences of memory operations, it is
  1023. possible for a hazard condition intended for a cache line to instead
  1024. be incorrectly associated with a different cache line. This false
  1025. hazard might then cause a processor deadlock. The workaround enables
  1026. the L1 caching of the NEON accesses and disables the PLD instruction
  1027. in the ACTLR register. Note that setting specific bits in the ACTLR
  1028. register may not be available in non-secure mode.
  1029. config ARM_ERRATA_460075
  1030. bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
  1031. depends on CPU_V7
  1032. help
  1033. This option enables the workaround for the 460075 Cortex-A8 (r2p0)
  1034. erratum. Any asynchronous access to the L2 cache may encounter a
  1035. situation in which recent store transactions to the L2 cache are lost
  1036. and overwritten with stale memory contents from external memory. The
  1037. workaround disables the write-allocate mode for the L2 cache via the
  1038. ACTLR register. Note that setting specific bits in the ACTLR register
  1039. may not be available in non-secure mode.
  1040. config ARM_ERRATA_742230
  1041. bool "ARM errata: DMB operation may be faulty"
  1042. depends on CPU_V7 && SMP
  1043. help
  1044. This option enables the workaround for the 742230 Cortex-A9
  1045. (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
  1046. between two write operations may not ensure the correct visibility
  1047. ordering of the two writes. This workaround sets a specific bit in
  1048. the diagnostic register of the Cortex-A9 which causes the DMB
  1049. instruction to behave as a DSB, ensuring the correct behaviour of
  1050. the two writes.
  1051. config ARM_ERRATA_742231
  1052. bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
  1053. depends on CPU_V7 && SMP
  1054. help
  1055. This option enables the workaround for the 742231 Cortex-A9
  1056. (r2p0..r2p2) erratum. Under certain conditions, specific to the
  1057. Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
  1058. accessing some data located in the same cache line, may get corrupted
  1059. data due to bad handling of the address hazard when the line gets
  1060. replaced from one of the CPUs at the same time as another CPU is
  1061. accessing it. This workaround sets specific bits in the diagnostic
  1062. register of the Cortex-A9 which reduces the linefill issuing
  1063. capabilities of the processor.
  1064. config PL310_ERRATA_588369
  1065. bool "PL310 errata: Clean & Invalidate maintenance operations do not invalidate clean lines"
  1066. depends on CACHE_L2X0
  1067. help
  1068. The PL310 L2 cache controller implements three types of Clean &
  1069. Invalidate maintenance operations: by Physical Address
  1070. (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
  1071. They are architecturally defined to behave as the execution of a
  1072. clean operation followed immediately by an invalidate operation,
  1073. both performing to the same memory location. This functionality
  1074. is not correctly implemented in PL310 as clean lines are not
  1075. invalidated as a result of these operations.
  1076. config ARM_ERRATA_720789
  1077. bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
  1078. depends on CPU_V7
  1079. help
  1080. This option enables the workaround for the 720789 Cortex-A9 (prior to
  1081. r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
  1082. broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
  1083. As a consequence of this erratum, some TLB entries which should be
  1084. invalidated are not, resulting in an incoherency in the system page
  1085. tables. The workaround changes the TLB flushing routines to invalidate
  1086. entries regardless of the ASID.
  1087. config PL310_ERRATA_727915
  1088. bool "PL310 errata: Background Clean & Invalidate by Way operation can cause data corruption"
  1089. depends on CACHE_L2X0
  1090. help
  1091. PL310 implements the Clean & Invalidate by Way L2 cache maintenance
  1092. operation (offset 0x7FC). This operation runs in background so that
  1093. PL310 can handle normal accesses while it is in progress. Under very
  1094. rare circumstances, due to this erratum, write data can be lost when
  1095. PL310 treats a cacheable write transaction during a Clean &
  1096. Invalidate by Way operation.
  1097. config ARM_ERRATA_743622
  1098. bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
  1099. depends on CPU_V7
  1100. help
  1101. This option enables the workaround for the 743622 Cortex-A9
  1102. (r2p*) erratum. Under very rare conditions, a faulty
  1103. optimisation in the Cortex-A9 Store Buffer may lead to data
  1104. corruption. This workaround sets a specific bit in the diagnostic
  1105. register of the Cortex-A9 which disables the Store Buffer
  1106. optimisation, preventing the defect from occurring. This has no
  1107. visible impact on the overall performance or power consumption of the
  1108. processor.
  1109. config ARM_ERRATA_751472
  1110. bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
  1111. depends on CPU_V7
  1112. help
  1113. This option enables the workaround for the 751472 Cortex-A9 (prior
  1114. to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
  1115. completion of a following broadcasted operation if the second
  1116. operation is received by a CPU before the ICIALLUIS has completed,
  1117. potentially leading to corrupted entries in the cache or TLB.
  1118. config PL310_ERRATA_753970
  1119. bool "PL310 errata: cache sync operation may be faulty"
  1120. depends on CACHE_PL310
  1121. help
  1122. This option enables the workaround for the 753970 PL310 (r3p0) erratum.
  1123. Under some condition the effect of cache sync operation on
  1124. the store buffer still remains when the operation completes.
  1125. This means that the store buffer is always asked to drain and
  1126. this prevents it from merging any further writes. The workaround
  1127. is to replace the normal offset of cache sync operation (0x730)
  1128. by another offset targeting an unmapped PL310 register 0x740.
  1129. This has the same effect as the cache sync operation: store buffer
  1130. drain and waiting for all buffers empty.
  1131. config ARM_ERRATA_754322
  1132. bool "ARM errata: possible faulty MMU translations following an ASID switch"
  1133. depends on CPU_V7
  1134. help
  1135. This option enables the workaround for the 754322 Cortex-A9 (r2p*,
  1136. r3p*) erratum. A speculative memory access may cause a page table walk
  1137. which starts prior to an ASID switch but completes afterwards. This
  1138. can populate the micro-TLB with a stale entry which may be hit with
  1139. the new ASID. This workaround places two dsb instructions in the mm
  1140. switching code so that no page table walks can cross the ASID switch.
  1141. config ARM_ERRATA_754327
  1142. bool "ARM errata: no automatic Store Buffer drain"
  1143. depends on CPU_V7 && SMP
  1144. help
  1145. This option enables the workaround for the 754327 Cortex-A9 (prior to
  1146. r2p0) erratum. The Store Buffer does not have any automatic draining
  1147. mechanism and therefore a livelock may occur if an external agent
  1148. continuously polls a memory location waiting to observe an update.
  1149. This workaround defines cpu_relax() as smp_mb(), preventing correctly
  1150. written polling loops from denying visibility of updates to memory.
  1151. config ARM_ERRATA_364296
  1152. bool "ARM errata: Possible cache data corruption with hit-under-miss enabled"
  1153. depends on CPU_V6 && !SMP
  1154. help
  1155. This options enables the workaround for the 364296 ARM1136
  1156. r0p2 erratum (possible cache data corruption with
  1157. hit-under-miss enabled). It sets the undocumented bit 31 in
  1158. the auxiliary control register and the FI bit in the control
  1159. register, thus disabling hit-under-miss without putting the
  1160. processor into full low interrupt latency mode. ARM11MPCore
  1161. is not affected.
  1162. config ARM_ERRATA_764369
  1163. bool "ARM errata: Data cache line maintenance operation by MVA may not succeed"
  1164. depends on CPU_V7 && SMP
  1165. help
  1166. This option enables the workaround for erratum 764369
  1167. affecting Cortex-A9 MPCore with two or more processors (all
  1168. current revisions). Under certain timing circumstances, a data
  1169. cache line maintenance operation by MVA targeting an Inner
  1170. Shareable memory region may fail to proceed up to either the
  1171. Point of Coherency or to the Point of Unification of the
  1172. system. This workaround adds a DSB instruction before the
  1173. relevant cache maintenance functions and sets a specific bit
  1174. in the diagnostic control register of the SCU.
  1175. config PL310_ERRATA_769419
  1176. bool "PL310 errata: no automatic Store Buffer drain"
  1177. depends on CACHE_L2X0
  1178. help
  1179. On revisions of the PL310 prior to r3p2, the Store Buffer does
  1180. not automatically drain. This can cause normal, non-cacheable
  1181. writes to be retained when the memory system is idle, leading
  1182. to suboptimal I/O performance for drivers using coherent DMA.
  1183. This option adds a write barrier to the cpu_idle loop so that,
  1184. on systems with an outer cache, the store buffer is drained
  1185. explicitly.
  1186. endmenu
  1187. source "arch/arm/common/Kconfig"
  1188. menu "Bus support"
  1189. config ARM_AMBA
  1190. bool
  1191. config ISA
  1192. bool
  1193. help
  1194. Find out whether you have ISA slots on your motherboard. ISA is the
  1195. name of a bus system, i.e. the way the CPU talks to the other stuff
  1196. inside your box. Other bus systems are PCI, EISA, MicroChannel
  1197. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  1198. newer boards don't support it. If you have ISA, say Y, otherwise N.
  1199. # Select ISA DMA controller support
  1200. config ISA_DMA
  1201. bool
  1202. select ISA_DMA_API
  1203. # Select ISA DMA interface
  1204. config ISA_DMA_API
  1205. bool
  1206. config PCI
  1207. bool "PCI support" if MIGHT_HAVE_PCI
  1208. help
  1209. Find out whether you have a PCI motherboard. PCI is the name of a
  1210. bus system, i.e. the way the CPU talks to the other stuff inside
  1211. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  1212. VESA. If you have PCI, say Y, otherwise N.
  1213. config PCI_DOMAINS
  1214. bool
  1215. depends on PCI
  1216. config PCI_NANOENGINE
  1217. bool "BSE nanoEngine PCI support"
  1218. depends on SA1100_NANOENGINE
  1219. help
  1220. Enable PCI on the BSE nanoEngine board.
  1221. config PCI_SYSCALL
  1222. def_bool PCI
  1223. # Select the host bridge type
  1224. config PCI_HOST_VIA82C505
  1225. bool
  1226. depends on PCI && ARCH_SHARK
  1227. default y
  1228. config PCI_HOST_ITE8152
  1229. bool
  1230. depends on PCI && MACH_ARMCORE
  1231. default y
  1232. select DMABOUNCE
  1233. source "drivers/pci/Kconfig"
  1234. source "drivers/pcmcia/Kconfig"
  1235. endmenu
  1236. menu "Kernel Features"
  1237. source "kernel/time/Kconfig"
  1238. config HAVE_SMP
  1239. bool
  1240. help
  1241. This option should be selected by machines which have an SMP-
  1242. capable CPU.
  1243. The only effect of this option is to make the SMP-related
  1244. options available to the user for configuration.
  1245. config SMP
  1246. bool "Symmetric Multi-Processing"
  1247. depends on CPU_V6K || CPU_V7
  1248. depends on GENERIC_CLOCKEVENTS
  1249. depends on HAVE_SMP
  1250. depends on MMU
  1251. select USE_GENERIC_SMP_HELPERS
  1252. select HAVE_ARM_SCU if !ARCH_MSM_SCORPIONMP
  1253. help
  1254. This enables support for systems with more than one CPU. If you have
  1255. a system with only one CPU, like most personal computers, say N. If
  1256. you have a system with more than one CPU, say Y.
  1257. If you say N here, the kernel will run on single and multiprocessor
  1258. machines, but will use only one CPU of a multiprocessor machine. If
  1259. you say Y here, the kernel will run on many, but not all, single
  1260. processor machines. On a single processor machine, the kernel will
  1261. run faster if you say N here.
  1262. See also <file:Documentation/x86/i386/IO-APIC.txt>,
  1263. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  1264. <http://tldp.org/HOWTO/SMP-HOWTO.html>.
  1265. If you don't know what to do here, say N.
  1266. config SMP_ON_UP
  1267. bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
  1268. depends on EXPERIMENTAL
  1269. depends on SMP && !XIP_KERNEL
  1270. default y
  1271. help
  1272. SMP kernels contain instructions which fail on non-SMP processors.
  1273. Enabling this option allows the kernel to modify itself to make
  1274. these instructions safe. Disabling it allows about 1K of space
  1275. savings.
  1276. If you don't know what to do here, say Y.
  1277. config ARM_CPU_TOPOLOGY
  1278. bool "Support cpu topology definition"
  1279. depends on SMP && CPU_V7
  1280. default y
  1281. help
  1282. Support ARM cpu topology definition. The MPIDR register defines
  1283. affinity between processors which is then used to describe the cpu
  1284. topology of an ARM System.
  1285. config SCHED_MC
  1286. bool "Multi-core scheduler support"
  1287. depends on ARM_CPU_TOPOLOGY
  1288. help
  1289. Multi-core scheduler support improves the CPU scheduler's decision
  1290. making when dealing with multi-core CPU chips at a cost of slightly
  1291. increased overhead in some places. If unsure say N here.
  1292. config SCHED_SMT
  1293. bool "SMT scheduler support"
  1294. depends on ARM_CPU_TOPOLOGY
  1295. help
  1296. Improves the CPU scheduler's decision making when dealing with
  1297. MultiThreading at a cost of slightly increased overhead in some
  1298. places. If unsure say N here.
  1299. config HAVE_ARM_SCU
  1300. bool
  1301. help
  1302. This option enables support for the ARM system coherency unit
  1303. config HAVE_ARM_TWD
  1304. bool
  1305. depends on SMP
  1306. select TICK_ONESHOT
  1307. help
  1308. This options enables support for the ARM timer and watchdog unit
  1309. choice
  1310. prompt "Memory split"
  1311. default VMSPLIT_3G
  1312. help
  1313. Select the desired split between kernel and user memory.
  1314. If you are not absolutely sure what you are doing, leave this
  1315. option alone!
  1316. config VMSPLIT_3G
  1317. bool "3G/1G user/kernel split"
  1318. config VMSPLIT_2G
  1319. bool "2G/2G user/kernel split"
  1320. config VMSPLIT_1G
  1321. bool "1G/3G user/kernel split"
  1322. endchoice
  1323. config PAGE_OFFSET
  1324. hex
  1325. default 0x40000000 if VMSPLIT_1G
  1326. default 0x80000000 if VMSPLIT_2G
  1327. default 0xC0000000
  1328. config NR_CPUS
  1329. int "Maximum number of CPUs (2-32)"
  1330. range 2 32
  1331. depends on SMP
  1332. default "4"
  1333. config HOTPLUG_CPU
  1334. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  1335. depends on SMP && HOTPLUG && EXPERIMENTAL
  1336. help
  1337. Say Y here to experiment with turning CPUs off and on. CPUs
  1338. can be controlled through /sys/devices/system/cpu.
  1339. config LOCAL_TIMERS
  1340. bool "Use local timer interrupts"
  1341. depends on SMP
  1342. default y
  1343. select HAVE_ARM_TWD if (!ARCH_MSM_SCORPIONMP && !EXYNOS4_MCT)
  1344. help
  1345. Enable support for local timers on SMP platforms, rather then the
  1346. legacy IPI broadcast method. Local timers allows the system
  1347. accounting to be spread across the timer interval, preventing a
  1348. "thundering herd" at every timer tick.
  1349. config ARCH_NR_GPIO
  1350. int
  1351. default 1024 if ARCH_SHMOBILE || ARCH_TEGRA
  1352. default 355 if ARCH_U8500
  1353. default 0
  1354. help
  1355. Maximum number of GPIOs in the system.
  1356. If unsure, leave the default value.
  1357. source kernel/Kconfig.preempt
  1358. config HZ
  1359. int
  1360. default 200 if ARCH_EBSA110 || ARCH_S3C2410 || ARCH_S5P64X0 || \
  1361. ARCH_S5PV210 || ARCH_EXYNOS4
  1362. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  1363. default AT91_TIMER_HZ if ARCH_AT91
  1364. default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
  1365. default 100
  1366. config THUMB2_KERNEL
  1367. bool "Compile the kernel in Thumb-2 mode (EXPERIMENTAL)"
  1368. depends on CPU_V7 && !CPU_V6 && !CPU_V6K && EXPERIMENTAL
  1369. select AEABI
  1370. select ARM_ASM_UNIFIED
  1371. select ARM_UNWIND
  1372. help
  1373. By enabling this option, the kernel will be compiled in
  1374. Thumb-2 mode. A compiler/assembler that understand the unified
  1375. ARM-Thumb syntax is needed.
  1376. If unsure, say N.
  1377. config THUMB2_AVOID_R_ARM_THM_JUMP11
  1378. bool "Work around buggy Thumb-2 short branch relocations in gas"
  1379. depends on THUMB2_KERNEL && MODULES
  1380. default y
  1381. help
  1382. Various binutils versions can resolve Thumb-2 branches to
  1383. locally-defined, preemptible global symbols as short-range "b.n"
  1384. branch instructions.
  1385. This is a problem, because there's no guarantee the final
  1386. destination of the symbol, or any candidate locations for a
  1387. trampoline, are within range of the branch. For this reason, the
  1388. kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
  1389. relocation in modules at all, and it makes little sense to add
  1390. support.
  1391. The symptom is that the kernel fails with an "unsupported
  1392. relocation" error when loading some modules.
  1393. Until fixed tools are available, passing
  1394. -fno-optimize-sibling-calls to gcc should prevent gcc generating
  1395. code which hits this problem, at the cost of a bit of extra runtime
  1396. stack usage in some cases.
  1397. The problem is described in more detail at:
  1398. https://bugs.launchpad.net/binutils-linaro/+bug/725126
  1399. Only Thumb-2 kernels are affected.
  1400. Unless you are sure your tools don't have this problem, say Y.
  1401. config ARM_ASM_UNIFIED
  1402. bool
  1403. config AEABI
  1404. bool "Use the ARM EABI to compile the kernel"
  1405. help
  1406. This option allows for the kernel to be compiled using the latest
  1407. ARM ABI (aka EABI). This is only useful if you are using a user
  1408. space environment that is also compiled with EABI.
  1409. Since there are major incompatibilities between the legacy ABI and
  1410. EABI, especially with regard to structure member alignment, this
  1411. option also changes the kernel syscall calling convention to
  1412. disambiguate both ABIs and allow for backward compatibility support
  1413. (selected with CONFIG_OABI_COMPAT).
  1414. To use this you need GCC version 4.0.0 or later.
  1415. config OABI_COMPAT
  1416. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  1417. depends on AEABI && EXPERIMENTAL && !THUMB2_KERNEL
  1418. default y
  1419. help
  1420. This option preserves the old syscall interface along with the
  1421. new (ARM EABI) one. It also provides a compatibility layer to
  1422. intercept syscalls that have structure arguments which layout
  1423. in memory differs between the legacy ABI and the new ARM EABI
  1424. (only for non "thumb" binaries). This option adds a tiny
  1425. overhead to all syscalls and produces a slightly larger kernel.
  1426. If you know you'll be using only pure EABI user space then you
  1427. can say N here. If this option is not selected and you attempt
  1428. to execute a legacy ABI binary then the result will be
  1429. UNPREDICTABLE (in fact it can be predicted that it won't work
  1430. at all). If in doubt say Y.
  1431. config ARCH_HAS_HOLES_MEMORYMODEL
  1432. bool
  1433. config ARCH_SPARSEMEM_ENABLE
  1434. bool
  1435. config ARCH_SPARSEMEM_DEFAULT
  1436. def_bool ARCH_SPARSEMEM_ENABLE
  1437. config ARCH_SELECT_MEMORY_MODEL
  1438. def_bool ARCH_SPARSEMEM_ENABLE
  1439. config HAVE_ARCH_PFN_VALID
  1440. def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
  1441. config HIGHMEM
  1442. bool "High Memory Support"
  1443. depends on MMU
  1444. help
  1445. The address space of ARM processors is only 4 Gigabytes large
  1446. and it has to accommodate user address space, kernel address
  1447. space as well as some memory mapped IO. That means that, if you
  1448. have a large amount of physical memory and/or IO, not all of the
  1449. memory can be "permanently mapped" by the kernel. The physical
  1450. memory that is not permanently mapped is called "high memory".
  1451. Depending on the selected kernel/user memory split, minimum
  1452. vmalloc space and actual amount of RAM, you may not need this
  1453. option which should result in a slightly faster kernel.
  1454. If unsure, say n.
  1455. config HIGHPTE
  1456. bool "Allocate 2nd-level pagetables from highmem"
  1457. depends on HIGHMEM
  1458. config HW_PERF_EVENTS
  1459. bool "Enable hardware performance counter support for perf events"
  1460. depends on PERF_EVENTS && CPU_HAS_PMU
  1461. default y
  1462. help
  1463. Enable hardware performance counter support for perf events. If
  1464. disabled, perf events will use software events only.
  1465. source "mm/Kconfig"
  1466. config FORCE_MAX_ZONEORDER
  1467. int "Maximum zone order" if ARCH_SHMOBILE
  1468. range 11 64 if ARCH_SHMOBILE
  1469. default "9" if SA1111
  1470. default "11"
  1471. help
  1472. The kernel memory allocator divides physically contiguous memory
  1473. blocks into "zones", where each zone is a power of two number of
  1474. pages. This option selects the largest power of two that the kernel
  1475. keeps in the memory allocator. If you need to allocate very large
  1476. blocks of physically contiguous memory, then you may need to
  1477. increase this value.
  1478. This config option is actually maximum order plus one. For example,
  1479. a value of 11 means that the largest free memory block is 2^10 pages.
  1480. config LEDS
  1481. bool "Timer and CPU usage LEDs"
  1482. depends on ARCH_CDB89712 || ARCH_EBSA110 || \
  1483. ARCH_EBSA285 || ARCH_INTEGRATOR || \
  1484. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  1485. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  1486. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  1487. ARCH_AT91 || ARCH_DAVINCI || \
  1488. ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
  1489. help
  1490. If you say Y here, the LEDs on your machine will be used
  1491. to provide useful information about your current system status.
  1492. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  1493. be able to select which LEDs are active using the options below. If
  1494. you are compiling a kernel for the EBSA-110 or the LART however, the
  1495. red LED will simply flash regularly to indicate that the system is
  1496. still functional. It is safe to say Y here if you have a CATS
  1497. system, but the driver will do nothing.
  1498. config LEDS_TIMER
  1499. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  1500. OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1501. || MACH_OMAP_PERSEUS2
  1502. depends on LEDS
  1503. depends on !GENERIC_CLOCKEVENTS
  1504. default y if ARCH_EBSA110
  1505. help
  1506. If you say Y here, one of the system LEDs (the green one on the
  1507. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  1508. will flash regularly to indicate that the system is still
  1509. operational. This is mainly useful to kernel hackers who are
  1510. debugging unstable kernels.
  1511. The LART uses the same LED for both Timer LED and CPU usage LED
  1512. functions. You may choose to use both, but the Timer LED function
  1513. will overrule the CPU usage LED.
  1514. config LEDS_CPU
  1515. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  1516. !ARCH_OMAP) \
  1517. || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1518. || MACH_OMAP_PERSEUS2
  1519. depends on LEDS
  1520. help
  1521. If you say Y here, the red LED will be used to give a good real
  1522. time indication of CPU usage, by lighting whenever the idle task
  1523. is not currently executing.
  1524. The LART uses the same LED for both Timer LED and CPU usage LED
  1525. functions. You may choose to use both, but the Timer LED function
  1526. will overrule the CPU usage LED.
  1527. config ALIGNMENT_TRAP
  1528. bool
  1529. depends on CPU_CP15_MMU
  1530. default y if !ARCH_EBSA110
  1531. select HAVE_PROC_CPU if PROC_FS
  1532. help
  1533. ARM processors cannot fetch/store information which is not
  1534. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  1535. address divisible by 4. On 32-bit ARM processors, these non-aligned
  1536. fetch/store instructions will be emulated in software if you say
  1537. here, which has a severe performance impact. This is necessary for
  1538. correct operation of some network protocols. With an IP-only
  1539. configuration it is safe to say N, otherwise say Y.
  1540. config UACCESS_WITH_MEMCPY
  1541. bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
  1542. depends on MMU && EXPERIMENTAL
  1543. default y if CPU_FEROCEON
  1544. help
  1545. Implement faster copy_to_user and clear_user methods for CPU
  1546. cores where a 8-word STM instruction give significantly higher
  1547. memory write throughput than a sequence of individual 32bit stores.
  1548. A possible side effect is a slight increase in scheduling latency
  1549. between threads sharing the same address space if they invoke
  1550. such copy operations with large buffers.
  1551. However, if the CPU data cache is using a write-allocate mode,
  1552. this option is unlikely to provide any performance gain.
  1553. config SECCOMP
  1554. bool
  1555. prompt "Enable seccomp to safely compute untrusted bytecode"
  1556. ---help---
  1557. This kernel feature is useful for number crunching applications
  1558. that may need to compute untrusted bytecode during their
  1559. execution. By using pipes or other transports made available to
  1560. the process as file descriptors supporting the read/write
  1561. syscalls, it's possible to isolate those applications in
  1562. their own address space using seccomp. Once seccomp is
  1563. enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
  1564. and the task is only allowed to execute a few safe syscalls
  1565. defined by each seccomp mode.
  1566. config CC_STACKPROTECTOR
  1567. bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
  1568. depends on EXPERIMENTAL
  1569. help
  1570. This option turns on the -fstack-protector GCC feature. This
  1571. feature puts, at the beginning of functions, a canary value on
  1572. the stack just before the return address, and validates
  1573. the value just before actually returning. Stack based buffer
  1574. overflows (that need to overwrite this return address) now also
  1575. overwrite the canary, which gets detected and the attack is then
  1576. neutralized via a kernel panic.
  1577. This feature requires gcc version 4.2 or above.
  1578. config DEPRECATED_PARAM_STRUCT
  1579. bool "Provide old way to pass kernel parameters"
  1580. help
  1581. This was deprecated in 2001 and announced to live on for 5 years.
  1582. Some old boot loaders still use this way.
  1583. endmenu
  1584. menu "Boot options"
  1585. config USE_OF
  1586. bool "Flattened Device Tree support"
  1587. select OF
  1588. select OF_EARLY_FLATTREE
  1589. select IRQ_DOMAIN
  1590. help
  1591. Include support for flattened device tree machine descriptions.
  1592. # Compressed boot loader in ROM. Yes, we really want to ask about
  1593. # TEXT and BSS so we preserve their values in the config files.
  1594. config ZBOOT_ROM_TEXT
  1595. hex "Compressed ROM boot loader base address"
  1596. default "0"
  1597. help
  1598. The physical address at which the ROM-able zImage is to be
  1599. placed in the target. Platforms which normally make use of
  1600. ROM-able zImage formats normally set this to a suitable
  1601. value in their defconfig file.
  1602. If ZBOOT_ROM is not enabled, this has no effect.
  1603. config ZBOOT_ROM_BSS
  1604. hex "Compressed ROM boot loader BSS address"
  1605. default "0"
  1606. help
  1607. The base address of an area of read/write memory in the target
  1608. for the ROM-able zImage which must be available while the
  1609. decompressor is running. It must be large enough to hold the
  1610. entire decompressed kernel plus an additional 128 KiB.
  1611. Platforms which normally make use of ROM-able zImage formats
  1612. normally set this to a suitable value in their defconfig file.
  1613. If ZBOOT_ROM is not enabled, this has no effect.
  1614. config ZBOOT_ROM
  1615. bool "Compressed boot loader in ROM/flash"
  1616. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  1617. help
  1618. Say Y here if you intend to execute your compressed kernel image
  1619. (zImage) directly from ROM or flash. If unsure, say N.
  1620. choice
  1621. prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)"
  1622. depends on ZBOOT_ROM && ARCH_SH7372 && EXPERIMENTAL
  1623. default ZBOOT_ROM_NONE
  1624. help
  1625. Include experimental SD/MMC loading code in the ROM-able zImage.
  1626. With this enabled it is possible to write the the ROM-able zImage
  1627. kernel image to an MMC or SD card and boot the kernel straight
  1628. from the reset vector. At reset the processor Mask ROM will load
  1629. the first part of the the ROM-able zImage which in turn loads the
  1630. rest the kernel image to RAM.
  1631. config ZBOOT_ROM_NONE
  1632. bool "No SD/MMC loader in zImage (EXPERIMENTAL)"
  1633. help
  1634. Do not load image from SD or MMC
  1635. config ZBOOT_ROM_MMCIF
  1636. bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
  1637. help
  1638. Load image from MMCIF hardware block.
  1639. config ZBOOT_ROM_SH_MOBILE_SDHI
  1640. bool "Include SuperH Mobile SDHI loader in zImage (EXPERIMENTAL)"
  1641. help
  1642. Load image from SDHI hardware block
  1643. endchoice
  1644. config ARM_APPENDED_DTB
  1645. bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
  1646. depends on OF && !ZBOOT_ROM && EXPERIMENTAL
  1647. help
  1648. With this option, the boot code will look for a device tree binary
  1649. (DTB) appended to zImage
  1650. (e.g. cat zImage <filename>.dtb > zImage_w_dtb).
  1651. This is meant as a backward compatibility convenience for those
  1652. systems with a bootloader that can't be upgraded to accommodate
  1653. the documented boot protocol using a device tree.
  1654. Beware that there is very little in terms of protection against
  1655. this option being confused by leftover garbage in memory that might
  1656. look like a DTB header after a reboot if no actual DTB is appended
  1657. to zImage. Do not leave this option active in a production kernel
  1658. if you don't intend to always append a DTB. Proper passing of the
  1659. location into r2 of a bootloader provided DTB is always preferable
  1660. to this option.
  1661. config ARM_ATAG_DTB_COMPAT
  1662. bool "Supplement the appended DTB with traditional ATAG information"
  1663. depends on ARM_APPENDED_DTB
  1664. help
  1665. Some old bootloaders can't be updated to a DTB capable one, yet
  1666. they provide ATAGs with memory configuration, the ramdisk address,
  1667. the kernel cmdline string, etc. Such information is dynamically
  1668. provided by the bootloader and can't always be stored in a static
  1669. DTB. To allow a device tree enabled kernel to be used with such
  1670. bootloaders, this option allows zImage to extract the information
  1671. from the ATAG list and store it at run time into the appended DTB.
  1672. config CMDLINE
  1673. string "Default kernel command string"
  1674. default ""
  1675. help
  1676. On some architectures (EBSA110 and CATS), there is currently no way
  1677. for the boot loader to pass arguments to the kernel. For these
  1678. architectures, you should supply some command-line options at build
  1679. time by entering them here. As a minimum, you should specify the
  1680. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  1681. choice
  1682. prompt "Kernel command line type" if CMDLINE != ""
  1683. default CMDLINE_FROM_BOOTLOADER
  1684. config CMDLINE_FROM_BOOTLOADER
  1685. bool "Use bootloader kernel arguments if available"
  1686. help
  1687. Uses the command-line options passed by the boot loader. If
  1688. the boot loader doesn't provide any, the default kernel command
  1689. string provided in CMDLINE will be used.
  1690. config CMDLINE_EXTEND
  1691. bool "Extend bootloader kernel arguments"
  1692. help
  1693. The command-line arguments provided by the boot loader will be
  1694. appended to the default kernel command string.
  1695. config CMDLINE_FORCE
  1696. bool "Always use the default kernel command string"
  1697. help
  1698. Always use the default kernel command string, even if the boot
  1699. loader passes other arguments to the kernel.
  1700. This is useful if you cannot or don't want to change the
  1701. command-line options your boot loader passes to the kernel.
  1702. endchoice
  1703. config XIP_KERNEL
  1704. bool "Kernel Execute-In-Place from ROM"
  1705. depends on !ZBOOT_ROM && !ARM_LPAE
  1706. help
  1707. Execute-In-Place allows the kernel to run from non-volatile storage
  1708. directly addressable by the CPU, such as NOR flash. This saves RAM
  1709. space since the text section of the kernel is not loaded from flash
  1710. to RAM. Read-write sections, such as the data section and stack,
  1711. are still copied to RAM. The XIP kernel is not compressed since
  1712. it has to run directly from flash, so it will take more space to
  1713. store it. The flash address used to link the kernel object files,
  1714. and for storing it, is configuration dependent. Therefore, if you
  1715. say Y here, you must know the proper physical address where to
  1716. store the kernel image depending on your own flash memory usage.
  1717. Also note that the make target becomes "make xipImage" rather than
  1718. "make zImage" or "make Image". The final kernel binary to put in
  1719. ROM memory will be arch/arm/boot/xipImage.
  1720. If unsure, say N.
  1721. config XIP_PHYS_ADDR
  1722. hex "XIP Kernel Physical Location"
  1723. depends on XIP_KERNEL
  1724. default "0x00080000"
  1725. help
  1726. This is the physical address in your flash memory the kernel will
  1727. be linked for and stored to. This address is dependent on your
  1728. own flash usage.
  1729. config KEXEC
  1730. bool "Kexec system call (EXPERIMENTAL)"
  1731. depends on EXPERIMENTAL && (!SMP || HOTPLUG_CPU)
  1732. help
  1733. kexec is a system call that implements the ability to shutdown your
  1734. current kernel, and to start another kernel. It is like a reboot
  1735. but it is independent of the system firmware. And like a reboot
  1736. you can start any kernel with it, not just Linux.
  1737. It is an ongoing process to be certain the hardware in a machine
  1738. is properly shutdown, so do not be surprised if this code does not
  1739. initially work for you. It may help to enable device hotplugging
  1740. support.
  1741. config ATAGS_PROC
  1742. bool "Export atags in procfs"
  1743. depends on KEXEC
  1744. default y
  1745. help
  1746. Should the atags used to boot the kernel be exported in an "atags"
  1747. file in procfs. Useful with kexec.
  1748. config CRASH_DUMP
  1749. bool "Build kdump crash kernel (EXPERIMENTAL)"
  1750. depends on EXPERIMENTAL
  1751. help
  1752. Generate crash dump after being started by kexec. This should
  1753. be normally only set in special crash dump kernels which are
  1754. loaded in the main kernel with kexec-tools into a specially
  1755. reserved region and then later executed after a crash by
  1756. kdump/kexec. The crash dump kernel must be compiled to a
  1757. memory address not used by the main kernel
  1758. For more details see Documentation/kdump/kdump.txt
  1759. config AUTO_ZRELADDR
  1760. bool "Auto calculation of the decompressed kernel image address"
  1761. depends on !ZBOOT_ROM && !ARCH_U300
  1762. help
  1763. ZRELADDR is the physical address where the decompressed kernel
  1764. image will be placed. If AUTO_ZRELADDR is selected, the address
  1765. will be determined at run-time by masking the current IP with
  1766. 0xf8000000. This assumes the zImage being placed in the first 128MB
  1767. from start of memory.
  1768. endmenu
  1769. menu "CPU Power Management"
  1770. if ARCH_HAS_CPUFREQ
  1771. source "drivers/cpufreq/Kconfig"
  1772. config CPU_FREQ_IMX
  1773. tristate "CPUfreq driver for i.MX CPUs"
  1774. depends on ARCH_MXC && CPU_FREQ
  1775. help
  1776. This enables the CPUfreq driver for i.MX CPUs.
  1777. config CPU_FREQ_SA1100
  1778. bool
  1779. config CPU_FREQ_SA1110
  1780. bool
  1781. config CPU_FREQ_INTEGRATOR
  1782. tristate "CPUfreq driver for ARM Integrator CPUs"
  1783. depends on ARCH_INTEGRATOR && CPU_FREQ
  1784. default y
  1785. help
  1786. This enables the CPUfreq driver for ARM Integrator CPUs.
  1787. For details, take a look at <file:Documentation/cpu-freq>.
  1788. If in doubt, say Y.
  1789. config CPU_FREQ_PXA
  1790. bool
  1791. depends on CPU_FREQ && ARCH_PXA && PXA25x
  1792. default y
  1793. select CPU_FREQ_TABLE
  1794. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  1795. config CPU_FREQ_S3C
  1796. bool
  1797. help
  1798. Internal configuration node for common cpufreq on Samsung SoC
  1799. config CPU_FREQ_S3C24XX
  1800. bool "CPUfreq driver for Samsung S3C24XX series CPUs (EXPERIMENTAL)"
  1801. depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
  1802. select CPU_FREQ_S3C
  1803. help
  1804. This enables the CPUfreq driver for the Samsung S3C24XX family
  1805. of CPUs.
  1806. For details, take a look at <file:Documentation/cpu-freq>.
  1807. If in doubt, say N.
  1808. config CPU_FREQ_S3C24XX_PLL
  1809. bool "Support CPUfreq changing of PLL frequency (EXPERIMENTAL)"
  1810. depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
  1811. help
  1812. Compile in support for changing the PLL frequency from the
  1813. S3C24XX series CPUfreq driver. The PLL takes time to settle
  1814. after a frequency change, so by default it is not enabled.
  1815. This also means that the PLL tables for the selected CPU(s) will
  1816. be built which may increase the size of the kernel image.
  1817. config CPU_FREQ_S3C24XX_DEBUG
  1818. bool "Debug CPUfreq Samsung driver core"
  1819. depends on CPU_FREQ_S3C24XX
  1820. help
  1821. Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
  1822. config CPU_FREQ_S3C24XX_IODEBUG
  1823. bool "Debug CPUfreq Samsung driver IO timing"
  1824. depends on CPU_FREQ_S3C24XX
  1825. help
  1826. Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
  1827. config CPU_FREQ_S3C24XX_DEBUGFS
  1828. bool "Export debugfs for CPUFreq"
  1829. depends on CPU_FREQ_S3C24XX && DEBUG_FS
  1830. help
  1831. Export status information via debugfs.
  1832. endif
  1833. source "drivers/cpuidle/Kconfig"
  1834. endmenu
  1835. menu "Floating point emulation"
  1836. comment "At least one emulation must be selected"
  1837. config FPE_NWFPE
  1838. bool "NWFPE math emulation"
  1839. depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
  1840. ---help---
  1841. Say Y to include the NWFPE floating point emulator in the kernel.
  1842. This is necessary to run most binaries. Linux does not currently
  1843. support floating point hardware so you need to say Y here even if
  1844. your machine has an FPA or floating point co-processor podule.
  1845. You may say N here if you are going to load the Acorn FPEmulator
  1846. early in the bootup.
  1847. config FPE_NWFPE_XP
  1848. bool "Support extended precision"
  1849. depends on FPE_NWFPE
  1850. help
  1851. Say Y to include 80-bit support in the kernel floating-point
  1852. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  1853. Note that gcc does not generate 80-bit operations by default,
  1854. so in most cases this option only enlarges the size of the
  1855. floating point emulator without any good reason.
  1856. You almost surely want to say N here.
  1857. config FPE_FASTFPE
  1858. bool "FastFPE math emulation (EXPERIMENTAL)"
  1859. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  1860. ---help---
  1861. Say Y here to include the FAST floating point emulator in the kernel.
  1862. This is an experimental much faster emulator which now also has full
  1863. precision for the mantissa. It does not support any exceptions.
  1864. It is very simple, and approximately 3-6 times faster than NWFPE.
  1865. It should be sufficient for most programs. It may be not suitable
  1866. for scientific calculations, but you have to check this for yourself.
  1867. If you do not feel you need a faster FP emulation you should better
  1868. choose NWFPE.
  1869. config VFP
  1870. bool "VFP-format floating point maths"
  1871. depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  1872. help
  1873. Say Y to include VFP support code in the kernel. This is needed
  1874. if your hardware includes a VFP unit.
  1875. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  1876. release notes and additional status information.
  1877. Say N if your target does not have VFP hardware.
  1878. config VFPv3
  1879. bool
  1880. depends on VFP
  1881. default y if CPU_V7
  1882. config NEON
  1883. bool "Advanced SIMD (NEON) Extension support"
  1884. depends on VFPv3 && CPU_V7
  1885. help
  1886. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  1887. Extension.
  1888. endmenu
  1889. menu "Userspace binary formats"
  1890. source "fs/Kconfig.binfmt"
  1891. config ARTHUR
  1892. tristate "RISC OS personality"
  1893. depends on !AEABI
  1894. help
  1895. Say Y here to include the kernel code necessary if you want to run
  1896. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  1897. experimental; if this sounds frightening, say N and sleep in peace.
  1898. You can also say M here to compile this support as a module (which
  1899. will be called arthur).
  1900. endmenu
  1901. menu "Power management options"
  1902. source "kernel/power/Kconfig"
  1903. config ARCH_SUSPEND_POSSIBLE
  1904. depends on !ARCH_S5PC100
  1905. depends on CPU_ARM920T || CPU_ARM926T || CPU_SA1100 || \
  1906. CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE
  1907. def_bool y
  1908. config ARM_CPU_SUSPEND
  1909. def_bool PM_SLEEP
  1910. endmenu
  1911. source "net/Kconfig"
  1912. source "drivers/Kconfig"
  1913. source "fs/Kconfig"
  1914. source "arch/arm/Kconfig.debug"
  1915. source "security/Kconfig"
  1916. source "crypto/Kconfig"
  1917. source "lib/Kconfig"