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. help
  228. This enables support for ARM Ltd RealView boards.
  229. config ARCH_VERSATILE
  230. bool "ARM Ltd. Versatile family"
  231. select ARM_AMBA
  232. select ARM_VIC
  233. select CLKDEV_LOOKUP
  234. select HAVE_MACH_CLKDEV
  235. select ICST
  236. select GENERIC_CLOCKEVENTS
  237. select ARCH_WANT_OPTIONAL_GPIOLIB
  238. select PLAT_VERSATILE
  239. select PLAT_VERSATILE_CLCD
  240. select PLAT_VERSATILE_FPGA_IRQ
  241. select ARM_TIMER_SP804
  242. help
  243. This enables support for ARM Ltd Versatile board.
  244. config ARCH_VEXPRESS
  245. bool "ARM Ltd. Versatile Express family"
  246. select ARCH_WANT_OPTIONAL_GPIOLIB
  247. select ARM_AMBA
  248. select ARM_TIMER_SP804
  249. select CLKDEV_LOOKUP
  250. select HAVE_MACH_CLKDEV
  251. select GENERIC_CLOCKEVENTS
  252. select HAVE_CLK
  253. select HAVE_PATA_PLATFORM
  254. select ICST
  255. select PLAT_VERSATILE
  256. select PLAT_VERSATILE_CLCD
  257. help
  258. This enables support for the ARM Ltd Versatile Express boards.
  259. config ARCH_AT91
  260. bool "Atmel AT91"
  261. select ARCH_REQUIRE_GPIOLIB
  262. select HAVE_CLK
  263. select CLKDEV_LOOKUP
  264. help
  265. This enables support for systems based on the Atmel AT91RM9200,
  266. AT91SAM9 and AT91CAP9 processors.
  267. config ARCH_BCMRING
  268. bool "Broadcom BCMRING"
  269. depends on MMU
  270. select CPU_V6
  271. select ARM_AMBA
  272. select ARM_TIMER_SP804
  273. select CLKDEV_LOOKUP
  274. select GENERIC_CLOCKEVENTS
  275. select ARCH_WANT_OPTIONAL_GPIOLIB
  276. help
  277. Support for Broadcom's BCMRing platform.
  278. config ARCH_HIGHBANK
  279. bool "Calxeda Highbank-based"
  280. select ARCH_WANT_OPTIONAL_GPIOLIB
  281. select ARM_AMBA
  282. select ARM_GIC
  283. select ARM_TIMER_SP804
  284. select CLKDEV_LOOKUP
  285. select CPU_V7
  286. select GENERIC_CLOCKEVENTS
  287. select HAVE_ARM_SCU
  288. select USE_OF
  289. help
  290. Support for the Calxeda Highbank SoC based boards.
  291. config ARCH_CLPS711X
  292. bool "Cirrus Logic CLPS711x/EP721x-based"
  293. select CPU_ARM720T
  294. select ARCH_USES_GETTIMEOFFSET
  295. select NEED_MACH_MEMORY_H
  296. help
  297. Support for Cirrus Logic 711x/721x based boards.
  298. config ARCH_CNS3XXX
  299. bool "Cavium Networks CNS3XXX family"
  300. select CPU_V6K
  301. select GENERIC_CLOCKEVENTS
  302. select ARM_GIC
  303. select MIGHT_HAVE_PCI
  304. select PCI_DOMAINS if PCI
  305. help
  306. Support for Cavium Networks CNS3XXX platform.
  307. config ARCH_GEMINI
  308. bool "Cortina Systems Gemini"
  309. select CPU_FA526
  310. select ARCH_REQUIRE_GPIOLIB
  311. select ARCH_USES_GETTIMEOFFSET
  312. help
  313. Support for the Cortina Systems Gemini family SoCs
  314. config ARCH_PRIMA2
  315. bool "CSR SiRFSoC PRIMA2 ARM Cortex A9 Platform"
  316. select CPU_V7
  317. select NO_IOPORT
  318. select GENERIC_CLOCKEVENTS
  319. select CLKDEV_LOOKUP
  320. select GENERIC_IRQ_CHIP
  321. select USE_OF
  322. select ZONE_DMA
  323. help
  324. Support for CSR SiRFSoC ARM Cortex A9 Platform
  325. config ARCH_EBSA110
  326. bool "EBSA-110"
  327. select CPU_SA110
  328. select ISA
  329. select NO_IOPORT
  330. select ARCH_USES_GETTIMEOFFSET
  331. select NEED_MACH_MEMORY_H
  332. help
  333. This is an evaluation board for the StrongARM processor available
  334. from Digital. It has limited hardware on-board, including an
  335. Ethernet interface, two PCMCIA sockets, two serial ports and a
  336. parallel port.
  337. config ARCH_EP93XX
  338. bool "EP93xx-based"
  339. select CPU_ARM920T
  340. select ARM_AMBA
  341. select ARM_VIC
  342. select CLKDEV_LOOKUP
  343. select ARCH_REQUIRE_GPIOLIB
  344. select ARCH_HAS_HOLES_MEMORYMODEL
  345. select ARCH_USES_GETTIMEOFFSET
  346. select NEED_MACH_MEMORY_H
  347. select MULTI_IRQ_HANDLER
  348. help
  349. This enables support for the Cirrus EP93xx series of CPUs.
  350. config ARCH_FOOTBRIDGE
  351. bool "FootBridge"
  352. select CPU_SA110
  353. select FOOTBRIDGE
  354. select GENERIC_CLOCKEVENTS
  355. select HAVE_IDE
  356. select NEED_MACH_MEMORY_H
  357. help
  358. Support for systems based on the DC21285 companion chip
  359. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  360. config ARCH_MXC
  361. bool "Freescale MXC/iMX-based"
  362. select GENERIC_CLOCKEVENTS
  363. select ARCH_REQUIRE_GPIOLIB
  364. select CLKDEV_LOOKUP
  365. select CLKSRC_MMIO
  366. select GENERIC_IRQ_CHIP
  367. select HAVE_SCHED_CLOCK
  368. select MULTI_IRQ_HANDLER
  369. help
  370. Support for Freescale MXC/iMX-based family of processors
  371. config ARCH_MXS
  372. bool "Freescale MXS-based"
  373. select GENERIC_CLOCKEVENTS
  374. select ARCH_REQUIRE_GPIOLIB
  375. select CLKDEV_LOOKUP
  376. select CLKSRC_MMIO
  377. help
  378. Support for Freescale MXS-based family of processors
  379. config ARCH_NETX
  380. bool "Hilscher NetX based"
  381. select CLKSRC_MMIO
  382. select CPU_ARM926T
  383. select ARM_VIC
  384. select GENERIC_CLOCKEVENTS
  385. select MULTI_IRQ_HANDLER
  386. help
  387. This enables support for systems based on the Hilscher NetX Soc
  388. config ARCH_H720X
  389. bool "Hynix HMS720x-based"
  390. select CPU_ARM720T
  391. select ISA_DMA_API
  392. select ARCH_USES_GETTIMEOFFSET
  393. help
  394. This enables support for systems based on the Hynix HMS720x
  395. config ARCH_IOP13XX
  396. bool "IOP13xx-based"
  397. depends on MMU
  398. select CPU_XSC3
  399. select PLAT_IOP
  400. select PCI
  401. select ARCH_SUPPORTS_MSI
  402. select VMSPLIT_1G
  403. select NEED_MACH_MEMORY_H
  404. help
  405. Support for Intel's IOP13XX (XScale) family of processors.
  406. config ARCH_IOP32X
  407. bool "IOP32x-based"
  408. depends on MMU
  409. select CPU_XSCALE
  410. select PLAT_IOP
  411. select PCI
  412. select ARCH_REQUIRE_GPIOLIB
  413. help
  414. Support for Intel's 80219 and IOP32X (XScale) family of
  415. processors.
  416. config ARCH_IOP33X
  417. bool "IOP33x-based"
  418. depends on MMU
  419. select CPU_XSCALE
  420. select PLAT_IOP
  421. select PCI
  422. select ARCH_REQUIRE_GPIOLIB
  423. help
  424. Support for Intel's IOP33X (XScale) family of processors.
  425. config ARCH_IXP23XX
  426. bool "IXP23XX-based"
  427. depends on MMU
  428. select CPU_XSC3
  429. select PCI
  430. select ARCH_USES_GETTIMEOFFSET
  431. select NEED_MACH_MEMORY_H
  432. help
  433. Support for Intel's IXP23xx (XScale) family of processors.
  434. config ARCH_IXP2000
  435. bool "IXP2400/2800-based"
  436. depends on MMU
  437. select CPU_XSCALE
  438. select PCI
  439. select ARCH_USES_GETTIMEOFFSET
  440. select NEED_MACH_MEMORY_H
  441. help
  442. Support for Intel's IXP2400/2800 (XScale) family of processors.
  443. config ARCH_IXP4XX
  444. bool "IXP4xx-based"
  445. depends on MMU
  446. select CLKSRC_MMIO
  447. select CPU_XSCALE
  448. select GENERIC_GPIO
  449. select GENERIC_CLOCKEVENTS
  450. select HAVE_SCHED_CLOCK
  451. select MIGHT_HAVE_PCI
  452. select DMABOUNCE if PCI
  453. help
  454. Support for Intel's IXP4XX (XScale) family of processors.
  455. config ARCH_DOVE
  456. bool "Marvell Dove"
  457. select CPU_V7
  458. select PCI
  459. select ARCH_REQUIRE_GPIOLIB
  460. select GENERIC_CLOCKEVENTS
  461. select PLAT_ORION
  462. help
  463. Support for the Marvell Dove SoC 88AP510
  464. config ARCH_KIRKWOOD
  465. bool "Marvell Kirkwood"
  466. select CPU_FEROCEON
  467. select PCI
  468. select ARCH_REQUIRE_GPIOLIB
  469. select GENERIC_CLOCKEVENTS
  470. select PLAT_ORION
  471. help
  472. Support for the following Marvell Kirkwood series SoCs:
  473. 88F6180, 88F6192 and 88F6281.
  474. config ARCH_LPC32XX
  475. bool "NXP LPC32XX"
  476. select CLKSRC_MMIO
  477. select CPU_ARM926T
  478. select ARCH_REQUIRE_GPIOLIB
  479. select HAVE_IDE
  480. select ARM_AMBA
  481. select USB_ARCH_HAS_OHCI
  482. select CLKDEV_LOOKUP
  483. select GENERIC_CLOCKEVENTS
  484. help
  485. Support for the NXP LPC32XX family of processors
  486. config ARCH_MV78XX0
  487. bool "Marvell MV78xx0"
  488. select CPU_FEROCEON
  489. select PCI
  490. select ARCH_REQUIRE_GPIOLIB
  491. select GENERIC_CLOCKEVENTS
  492. select PLAT_ORION
  493. help
  494. Support for the following Marvell MV78xx0 series SoCs:
  495. MV781x0, MV782x0.
  496. config ARCH_ORION5X
  497. bool "Marvell Orion"
  498. depends on MMU
  499. select CPU_FEROCEON
  500. select PCI
  501. select ARCH_REQUIRE_GPIOLIB
  502. select GENERIC_CLOCKEVENTS
  503. select PLAT_ORION
  504. help
  505. Support for the following Marvell Orion 5x series SoCs:
  506. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  507. Orion-2 (5281), Orion-1-90 (6183).
  508. config ARCH_MMP
  509. bool "Marvell PXA168/910/MMP2"
  510. depends on MMU
  511. select ARCH_REQUIRE_GPIOLIB
  512. select CLKDEV_LOOKUP
  513. select GENERIC_CLOCKEVENTS
  514. select HAVE_SCHED_CLOCK
  515. select TICK_ONESHOT
  516. select PLAT_PXA
  517. select SPARSE_IRQ
  518. select GENERIC_ALLOCATOR
  519. help
  520. Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
  521. config ARCH_KS8695
  522. bool "Micrel/Kendin KS8695"
  523. select CPU_ARM922T
  524. select ARCH_REQUIRE_GPIOLIB
  525. select ARCH_USES_GETTIMEOFFSET
  526. select NEED_MACH_MEMORY_H
  527. help
  528. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  529. System-on-Chip devices.
  530. config ARCH_W90X900
  531. bool "Nuvoton W90X900 CPU"
  532. select CPU_ARM926T
  533. select ARCH_REQUIRE_GPIOLIB
  534. select CLKDEV_LOOKUP
  535. select CLKSRC_MMIO
  536. select GENERIC_CLOCKEVENTS
  537. help
  538. Support for Nuvoton (Winbond logic dept.) ARM9 processor,
  539. At present, the w90x900 has been renamed nuc900, regarding
  540. the ARM series product line, you can login the following
  541. link address to know more.
  542. <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
  543. ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
  544. config ARCH_TEGRA
  545. bool "NVIDIA Tegra"
  546. select CLKDEV_LOOKUP
  547. select CLKSRC_MMIO
  548. select GENERIC_CLOCKEVENTS
  549. select GENERIC_GPIO
  550. select HAVE_CLK
  551. select HAVE_SCHED_CLOCK
  552. select ARCH_HAS_CPUFREQ
  553. help
  554. This enables support for NVIDIA Tegra based systems (Tegra APX,
  555. Tegra 6xx and Tegra 2 series).
  556. config ARCH_PICOXCELL
  557. bool "Picochip picoXcell"
  558. select ARCH_REQUIRE_GPIOLIB
  559. select ARM_PATCH_PHYS_VIRT
  560. select ARM_VIC
  561. select CPU_V6K
  562. select DW_APB_TIMER
  563. select GENERIC_CLOCKEVENTS
  564. select GENERIC_GPIO
  565. select HAVE_SCHED_CLOCK
  566. select HAVE_TCM
  567. select NO_IOPORT
  568. select USE_OF
  569. help
  570. This enables support for systems based on the Picochip picoXcell
  571. family of Femtocell devices. The picoxcell support requires device tree
  572. for all boards.
  573. config ARCH_PNX4008
  574. bool "Philips Nexperia PNX4008 Mobile"
  575. select CPU_ARM926T
  576. select CLKDEV_LOOKUP
  577. select ARCH_USES_GETTIMEOFFSET
  578. help
  579. This enables support for Philips PNX4008 mobile platform.
  580. config ARCH_PXA
  581. bool "PXA2xx/PXA3xx-based"
  582. depends on MMU
  583. select ARCH_MTD_XIP
  584. select ARCH_HAS_CPUFREQ
  585. select CLKDEV_LOOKUP
  586. select CLKSRC_MMIO
  587. select ARCH_REQUIRE_GPIOLIB
  588. select GENERIC_CLOCKEVENTS
  589. select HAVE_SCHED_CLOCK
  590. select TICK_ONESHOT
  591. select PLAT_PXA
  592. select SPARSE_IRQ
  593. select AUTO_ZRELADDR
  594. select MULTI_IRQ_HANDLER
  595. select ARM_CPU_SUSPEND if PM
  596. select HAVE_IDE
  597. help
  598. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  599. config ARCH_MSM
  600. bool "Qualcomm MSM"
  601. select HAVE_CLK
  602. select GENERIC_CLOCKEVENTS
  603. select ARCH_REQUIRE_GPIOLIB
  604. select CLKDEV_LOOKUP
  605. help
  606. Support for Qualcomm MSM/QSD based systems. This runs on the
  607. apps processor of the MSM/QSD and depends on a shared memory
  608. interface to the modem processor which runs the baseband
  609. stack and controls some vital subsystems
  610. (clock and power control, etc).
  611. config ARCH_SHMOBILE
  612. bool "Renesas SH-Mobile / R-Mobile"
  613. select HAVE_CLK
  614. select CLKDEV_LOOKUP
  615. select HAVE_MACH_CLKDEV
  616. select GENERIC_CLOCKEVENTS
  617. select NO_IOPORT
  618. select SPARSE_IRQ
  619. select MULTI_IRQ_HANDLER
  620. select PM_GENERIC_DOMAINS if PM
  621. select NEED_MACH_MEMORY_H
  622. help
  623. Support for Renesas's SH-Mobile and R-Mobile ARM platforms.
  624. config ARCH_RPC
  625. bool "RiscPC"
  626. select ARCH_ACORN
  627. select FIQ
  628. select TIMER_ACORN
  629. select ARCH_MAY_HAVE_PC_FDC
  630. select HAVE_PATA_PLATFORM
  631. select ISA_DMA_API
  632. select NO_IOPORT
  633. select ARCH_SPARSEMEM_ENABLE
  634. select ARCH_USES_GETTIMEOFFSET
  635. select HAVE_IDE
  636. select NEED_MACH_MEMORY_H
  637. help
  638. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  639. CD-ROM interface, serial and parallel port, and the floppy drive.
  640. config ARCH_SA1100
  641. bool "SA1100-based"
  642. select CLKSRC_MMIO
  643. select CPU_SA1100
  644. select ISA
  645. select ARCH_SPARSEMEM_ENABLE
  646. select ARCH_MTD_XIP
  647. select ARCH_HAS_CPUFREQ
  648. select CPU_FREQ
  649. select GENERIC_CLOCKEVENTS
  650. select HAVE_CLK
  651. select HAVE_SCHED_CLOCK
  652. select TICK_ONESHOT
  653. select ARCH_REQUIRE_GPIOLIB
  654. select HAVE_IDE
  655. select NEED_MACH_MEMORY_H
  656. help
  657. Support for StrongARM 11x0 based boards.
  658. config ARCH_S3C2410
  659. bool "Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443, S3C2450"
  660. select GENERIC_GPIO
  661. select ARCH_HAS_CPUFREQ
  662. select HAVE_CLK
  663. select CLKDEV_LOOKUP
  664. select ARCH_USES_GETTIMEOFFSET
  665. select HAVE_S3C2410_I2C if I2C
  666. help
  667. Samsung S3C2410X CPU based systems, such as the Simtec Electronics
  668. BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
  669. the Samsung SMDK2410 development board (and derivatives).
  670. Note, the S3C2416 and the S3C2450 are so close that they even share
  671. the same SoC ID code. This means that there is no separate machine
  672. directory (no arch/arm/mach-s3c2450) as the S3C2416 was first.
  673. config ARCH_S3C64XX
  674. bool "Samsung S3C64XX"
  675. select PLAT_SAMSUNG
  676. select CPU_V6
  677. select ARM_VIC
  678. select HAVE_CLK
  679. select HAVE_TCM
  680. select CLKDEV_LOOKUP
  681. select NO_IOPORT
  682. select ARCH_USES_GETTIMEOFFSET
  683. select ARCH_HAS_CPUFREQ
  684. select ARCH_REQUIRE_GPIOLIB
  685. select SAMSUNG_CLKSRC
  686. select SAMSUNG_IRQ_VIC_TIMER
  687. select S3C_GPIO_TRACK
  688. select S3C_DEV_NAND
  689. select USB_ARCH_HAS_OHCI
  690. select SAMSUNG_GPIOLIB_4BIT
  691. select HAVE_S3C2410_I2C if I2C
  692. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  693. select MULTI_IRQ_HANDLER
  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. select MULTI_IRQ_HANDLER
  817. help
  818. Support for the Nomadik platform by ST-Ericsson
  819. config ARCH_DAVINCI
  820. bool "TI DaVinci"
  821. select GENERIC_CLOCKEVENTS
  822. select ARCH_REQUIRE_GPIOLIB
  823. select ZONE_DMA
  824. select HAVE_IDE
  825. select CLKDEV_LOOKUP
  826. select GENERIC_ALLOCATOR
  827. select GENERIC_IRQ_CHIP
  828. select ARCH_HAS_HOLES_MEMORYMODEL
  829. help
  830. Support for TI's DaVinci platform.
  831. config ARCH_OMAP
  832. bool "TI OMAP"
  833. select HAVE_CLK
  834. select ARCH_REQUIRE_GPIOLIB
  835. select ARCH_HAS_CPUFREQ
  836. select CLKSRC_MMIO
  837. select GENERIC_CLOCKEVENTS
  838. select HAVE_SCHED_CLOCK
  839. select ARCH_HAS_HOLES_MEMORYMODEL
  840. help
  841. Support for TI's OMAP platform (OMAP1/2/3/4).
  842. config PLAT_SPEAR
  843. bool "ST SPEAr"
  844. select ARM_AMBA
  845. select ARCH_REQUIRE_GPIOLIB
  846. select CLKDEV_LOOKUP
  847. select CLKSRC_MMIO
  848. select GENERIC_CLOCKEVENTS
  849. select HAVE_CLK
  850. select MULTI_IRQ_HANDLER
  851. help
  852. Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
  853. config ARCH_VT8500
  854. bool "VIA/WonderMedia 85xx"
  855. select CPU_ARM926T
  856. select GENERIC_GPIO
  857. select ARCH_HAS_CPUFREQ
  858. select GENERIC_CLOCKEVENTS
  859. select ARCH_REQUIRE_GPIOLIB
  860. select HAVE_PWM
  861. help
  862. Support for VIA/WonderMedia VT8500/WM85xx System-on-Chip.
  863. config ARCH_ZYNQ
  864. bool "Xilinx Zynq ARM Cortex A9 Platform"
  865. select CPU_V7
  866. select GENERIC_CLOCKEVENTS
  867. select CLKDEV_LOOKUP
  868. select ARM_GIC
  869. select ARM_AMBA
  870. select ICST
  871. select USE_OF
  872. help
  873. Support for Xilinx Zynq ARM Cortex A9 Platform
  874. endchoice
  875. #
  876. # This is sorted alphabetically by mach-* pathname. However, plat-*
  877. # Kconfigs may be included either alphabetically (according to the
  878. # plat- suffix) or along side the corresponding mach-* source.
  879. #
  880. source "arch/arm/mach-at91/Kconfig"
  881. source "arch/arm/mach-bcmring/Kconfig"
  882. source "arch/arm/mach-clps711x/Kconfig"
  883. source "arch/arm/mach-cns3xxx/Kconfig"
  884. source "arch/arm/mach-davinci/Kconfig"
  885. source "arch/arm/mach-dove/Kconfig"
  886. source "arch/arm/mach-ep93xx/Kconfig"
  887. source "arch/arm/mach-footbridge/Kconfig"
  888. source "arch/arm/mach-gemini/Kconfig"
  889. source "arch/arm/mach-h720x/Kconfig"
  890. source "arch/arm/mach-integrator/Kconfig"
  891. source "arch/arm/mach-iop32x/Kconfig"
  892. source "arch/arm/mach-iop33x/Kconfig"
  893. source "arch/arm/mach-iop13xx/Kconfig"
  894. source "arch/arm/mach-ixp4xx/Kconfig"
  895. source "arch/arm/mach-ixp2000/Kconfig"
  896. source "arch/arm/mach-ixp23xx/Kconfig"
  897. source "arch/arm/mach-kirkwood/Kconfig"
  898. source "arch/arm/mach-ks8695/Kconfig"
  899. source "arch/arm/mach-lpc32xx/Kconfig"
  900. source "arch/arm/mach-msm/Kconfig"
  901. source "arch/arm/mach-mv78xx0/Kconfig"
  902. source "arch/arm/plat-mxc/Kconfig"
  903. source "arch/arm/mach-mxs/Kconfig"
  904. source "arch/arm/mach-netx/Kconfig"
  905. source "arch/arm/mach-nomadik/Kconfig"
  906. source "arch/arm/plat-nomadik/Kconfig"
  907. source "arch/arm/plat-omap/Kconfig"
  908. source "arch/arm/mach-omap1/Kconfig"
  909. source "arch/arm/mach-omap2/Kconfig"
  910. source "arch/arm/mach-orion5x/Kconfig"
  911. source "arch/arm/mach-pxa/Kconfig"
  912. source "arch/arm/plat-pxa/Kconfig"
  913. source "arch/arm/mach-mmp/Kconfig"
  914. source "arch/arm/mach-realview/Kconfig"
  915. source "arch/arm/mach-sa1100/Kconfig"
  916. source "arch/arm/plat-samsung/Kconfig"
  917. source "arch/arm/plat-s3c24xx/Kconfig"
  918. source "arch/arm/plat-s5p/Kconfig"
  919. source "arch/arm/plat-spear/Kconfig"
  920. source "arch/arm/plat-tcc/Kconfig"
  921. if ARCH_S3C2410
  922. source "arch/arm/mach-s3c2410/Kconfig"
  923. source "arch/arm/mach-s3c2412/Kconfig"
  924. source "arch/arm/mach-s3c2416/Kconfig"
  925. source "arch/arm/mach-s3c2440/Kconfig"
  926. source "arch/arm/mach-s3c2443/Kconfig"
  927. endif
  928. if ARCH_S3C64XX
  929. source "arch/arm/mach-s3c64xx/Kconfig"
  930. endif
  931. source "arch/arm/mach-s5p64x0/Kconfig"
  932. source "arch/arm/mach-s5pc100/Kconfig"
  933. source "arch/arm/mach-s5pv210/Kconfig"
  934. source "arch/arm/mach-exynos/Kconfig"
  935. source "arch/arm/mach-shmobile/Kconfig"
  936. source "arch/arm/mach-tegra/Kconfig"
  937. source "arch/arm/mach-u300/Kconfig"
  938. source "arch/arm/mach-ux500/Kconfig"
  939. source "arch/arm/mach-versatile/Kconfig"
  940. source "arch/arm/mach-vexpress/Kconfig"
  941. source "arch/arm/plat-versatile/Kconfig"
  942. source "arch/arm/mach-vt8500/Kconfig"
  943. source "arch/arm/mach-w90x900/Kconfig"
  944. # Definitions to make life easier
  945. config ARCH_ACORN
  946. bool
  947. config PLAT_IOP
  948. bool
  949. select GENERIC_CLOCKEVENTS
  950. select HAVE_SCHED_CLOCK
  951. config PLAT_ORION
  952. bool
  953. select CLKSRC_MMIO
  954. select GENERIC_IRQ_CHIP
  955. select HAVE_SCHED_CLOCK
  956. config PLAT_PXA
  957. bool
  958. config PLAT_VERSATILE
  959. bool
  960. config ARM_TIMER_SP804
  961. bool
  962. select CLKSRC_MMIO
  963. source arch/arm/mm/Kconfig
  964. config IWMMXT
  965. bool "Enable iWMMXt support"
  966. depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
  967. default y if PXA27x || PXA3xx || PXA95x || ARCH_MMP
  968. help
  969. Enable support for iWMMXt context switching at run time if
  970. running on a CPU that supports it.
  971. # bool 'Use XScale PMU as timer source' CONFIG_XSCALE_PMU_TIMER
  972. config XSCALE_PMU
  973. bool
  974. depends on CPU_XSCALE && !XSCALE_PMU_TIMER
  975. default y
  976. config CPU_HAS_PMU
  977. depends on (CPU_V6 || CPU_V6K || CPU_V7 || XSCALE_PMU) && \
  978. (!ARCH_OMAP3 || OMAP3_EMU)
  979. default y
  980. bool
  981. config MULTI_IRQ_HANDLER
  982. bool
  983. help
  984. Allow each machine to specify it's own IRQ handler at run time.
  985. if !MMU
  986. source "arch/arm/Kconfig-nommu"
  987. endif
  988. config ARM_ERRATA_411920
  989. bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
  990. depends on CPU_V6 || CPU_V6K
  991. help
  992. Invalidation of the Instruction Cache operation can
  993. fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
  994. It does not affect the MPCore. This option enables the ARM Ltd.
  995. recommended workaround.
  996. config ARM_ERRATA_430973
  997. bool "ARM errata: Stale prediction on replaced interworking branch"
  998. depends on CPU_V7
  999. help
  1000. This option enables the workaround for the 430973 Cortex-A8
  1001. (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
  1002. interworking branch is replaced with another code sequence at the
  1003. same virtual address, whether due to self-modifying code or virtual
  1004. to physical address re-mapping, Cortex-A8 does not recover from the
  1005. stale interworking branch prediction. This results in Cortex-A8
  1006. executing the new code sequence in the incorrect ARM or Thumb state.
  1007. The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
  1008. and also flushes the branch target cache at every context switch.
  1009. Note that setting specific bits in the ACTLR register may not be
  1010. available in non-secure mode.
  1011. config ARM_ERRATA_458693
  1012. bool "ARM errata: Processor deadlock when a false hazard is created"
  1013. depends on CPU_V7
  1014. help
  1015. This option enables the workaround for the 458693 Cortex-A8 (r2p0)
  1016. erratum. For very specific sequences of memory operations, it is
  1017. possible for a hazard condition intended for a cache line to instead
  1018. be incorrectly associated with a different cache line. This false
  1019. hazard might then cause a processor deadlock. The workaround enables
  1020. the L1 caching of the NEON accesses and disables the PLD instruction
  1021. in the ACTLR register. Note that setting specific bits in the ACTLR
  1022. register may not be available in non-secure mode.
  1023. config ARM_ERRATA_460075
  1024. bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
  1025. depends on CPU_V7
  1026. help
  1027. This option enables the workaround for the 460075 Cortex-A8 (r2p0)
  1028. erratum. Any asynchronous access to the L2 cache may encounter a
  1029. situation in which recent store transactions to the L2 cache are lost
  1030. and overwritten with stale memory contents from external memory. The
  1031. workaround disables the write-allocate mode for the L2 cache via the
  1032. ACTLR register. Note that setting specific bits in the ACTLR register
  1033. may not be available in non-secure mode.
  1034. config ARM_ERRATA_742230
  1035. bool "ARM errata: DMB operation may be faulty"
  1036. depends on CPU_V7 && SMP
  1037. help
  1038. This option enables the workaround for the 742230 Cortex-A9
  1039. (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
  1040. between two write operations may not ensure the correct visibility
  1041. ordering of the two writes. This workaround sets a specific bit in
  1042. the diagnostic register of the Cortex-A9 which causes the DMB
  1043. instruction to behave as a DSB, ensuring the correct behaviour of
  1044. the two writes.
  1045. config ARM_ERRATA_742231
  1046. bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
  1047. depends on CPU_V7 && SMP
  1048. help
  1049. This option enables the workaround for the 742231 Cortex-A9
  1050. (r2p0..r2p2) erratum. Under certain conditions, specific to the
  1051. Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
  1052. accessing some data located in the same cache line, may get corrupted
  1053. data due to bad handling of the address hazard when the line gets
  1054. replaced from one of the CPUs at the same time as another CPU is
  1055. accessing it. This workaround sets specific bits in the diagnostic
  1056. register of the Cortex-A9 which reduces the linefill issuing
  1057. capabilities of the processor.
  1058. config PL310_ERRATA_588369
  1059. bool "Clean & Invalidate maintenance operations do not invalidate clean lines"
  1060. depends on CACHE_L2X0
  1061. help
  1062. The PL310 L2 cache controller implements three types of Clean &
  1063. Invalidate maintenance operations: by Physical Address
  1064. (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
  1065. They are architecturally defined to behave as the execution of a
  1066. clean operation followed immediately by an invalidate operation,
  1067. both performing to the same memory location. This functionality
  1068. is not correctly implemented in PL310 as clean lines are not
  1069. invalidated as a result of these operations.
  1070. config ARM_ERRATA_720789
  1071. bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
  1072. depends on CPU_V7 && SMP
  1073. help
  1074. This option enables the workaround for the 720789 Cortex-A9 (prior to
  1075. r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
  1076. broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
  1077. As a consequence of this erratum, some TLB entries which should be
  1078. invalidated are not, resulting in an incoherency in the system page
  1079. tables. The workaround changes the TLB flushing routines to invalidate
  1080. entries regardless of the ASID.
  1081. config PL310_ERRATA_727915
  1082. bool "Background Clean & Invalidate by Way operation can cause data corruption"
  1083. depends on CACHE_L2X0
  1084. help
  1085. PL310 implements the Clean & Invalidate by Way L2 cache maintenance
  1086. operation (offset 0x7FC). This operation runs in background so that
  1087. PL310 can handle normal accesses while it is in progress. Under very
  1088. rare circumstances, due to this erratum, write data can be lost when
  1089. PL310 treats a cacheable write transaction during a Clean &
  1090. Invalidate by Way operation.
  1091. config ARM_ERRATA_743622
  1092. bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
  1093. depends on CPU_V7
  1094. help
  1095. This option enables the workaround for the 743622 Cortex-A9
  1096. (r2p0..r2p2) erratum. Under very rare conditions, a faulty
  1097. optimisation in the Cortex-A9 Store Buffer may lead to data
  1098. corruption. This workaround sets a specific bit in the diagnostic
  1099. register of the Cortex-A9 which disables the Store Buffer
  1100. optimisation, preventing the defect from occurring. This has no
  1101. visible impact on the overall performance or power consumption of the
  1102. processor.
  1103. config ARM_ERRATA_751472
  1104. bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
  1105. depends on CPU_V7 && SMP
  1106. help
  1107. This option enables the workaround for the 751472 Cortex-A9 (prior
  1108. to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
  1109. completion of a following broadcasted operation if the second
  1110. operation is received by a CPU before the ICIALLUIS has completed,
  1111. potentially leading to corrupted entries in the cache or TLB.
  1112. config ARM_ERRATA_753970
  1113. bool "ARM errata: cache sync operation may be faulty"
  1114. depends on CACHE_PL310
  1115. help
  1116. This option enables the workaround for the 753970 PL310 (r3p0) erratum.
  1117. Under some condition the effect of cache sync operation on
  1118. the store buffer still remains when the operation completes.
  1119. This means that the store buffer is always asked to drain and
  1120. this prevents it from merging any further writes. The workaround
  1121. is to replace the normal offset of cache sync operation (0x730)
  1122. by another offset targeting an unmapped PL310 register 0x740.
  1123. This has the same effect as the cache sync operation: store buffer
  1124. drain and waiting for all buffers empty.
  1125. config ARM_ERRATA_754322
  1126. bool "ARM errata: possible faulty MMU translations following an ASID switch"
  1127. depends on CPU_V7
  1128. help
  1129. This option enables the workaround for the 754322 Cortex-A9 (r2p*,
  1130. r3p*) erratum. A speculative memory access may cause a page table walk
  1131. which starts prior to an ASID switch but completes afterwards. This
  1132. can populate the micro-TLB with a stale entry which may be hit with
  1133. the new ASID. This workaround places two dsb instructions in the mm
  1134. switching code so that no page table walks can cross the ASID switch.
  1135. config ARM_ERRATA_754327
  1136. bool "ARM errata: no automatic Store Buffer drain"
  1137. depends on CPU_V7 && SMP
  1138. help
  1139. This option enables the workaround for the 754327 Cortex-A9 (prior to
  1140. r2p0) erratum. The Store Buffer does not have any automatic draining
  1141. mechanism and therefore a livelock may occur if an external agent
  1142. continuously polls a memory location waiting to observe an update.
  1143. This workaround defines cpu_relax() as smp_mb(), preventing correctly
  1144. written polling loops from denying visibility of updates to memory.
  1145. config ARM_ERRATA_364296
  1146. bool "ARM errata: Possible cache data corruption with hit-under-miss enabled"
  1147. depends on CPU_V6 && !SMP
  1148. help
  1149. This options enables the workaround for the 364296 ARM1136
  1150. r0p2 erratum (possible cache data corruption with
  1151. hit-under-miss enabled). It sets the undocumented bit 31 in
  1152. the auxiliary control register and the FI bit in the control
  1153. register, thus disabling hit-under-miss without putting the
  1154. processor into full low interrupt latency mode. ARM11MPCore
  1155. is not affected.
  1156. config ARM_ERRATA_764369
  1157. bool "ARM errata: Data cache line maintenance operation by MVA may not succeed"
  1158. depends on CPU_V7 && SMP
  1159. help
  1160. This option enables the workaround for erratum 764369
  1161. affecting Cortex-A9 MPCore with two or more processors (all
  1162. current revisions). Under certain timing circumstances, a data
  1163. cache line maintenance operation by MVA targeting an Inner
  1164. Shareable memory region may fail to proceed up to either the
  1165. Point of Coherency or to the Point of Unification of the
  1166. system. This workaround adds a DSB instruction before the
  1167. relevant cache maintenance functions and sets a specific bit
  1168. in the diagnostic control register of the SCU.
  1169. endmenu
  1170. source "arch/arm/common/Kconfig"
  1171. menu "Bus support"
  1172. config ARM_AMBA
  1173. bool
  1174. config ISA
  1175. bool
  1176. help
  1177. Find out whether you have ISA slots on your motherboard. ISA is the
  1178. name of a bus system, i.e. the way the CPU talks to the other stuff
  1179. inside your box. Other bus systems are PCI, EISA, MicroChannel
  1180. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  1181. newer boards don't support it. If you have ISA, say Y, otherwise N.
  1182. # Select ISA DMA controller support
  1183. config ISA_DMA
  1184. bool
  1185. select ISA_DMA_API
  1186. # Select ISA DMA interface
  1187. config ISA_DMA_API
  1188. bool
  1189. config PCI
  1190. bool "PCI support" if MIGHT_HAVE_PCI
  1191. help
  1192. Find out whether you have a PCI motherboard. PCI is the name of a
  1193. bus system, i.e. the way the CPU talks to the other stuff inside
  1194. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  1195. VESA. If you have PCI, say Y, otherwise N.
  1196. config PCI_DOMAINS
  1197. bool
  1198. depends on PCI
  1199. config PCI_NANOENGINE
  1200. bool "BSE nanoEngine PCI support"
  1201. depends on SA1100_NANOENGINE
  1202. help
  1203. Enable PCI on the BSE nanoEngine board.
  1204. config PCI_SYSCALL
  1205. def_bool PCI
  1206. # Select the host bridge type
  1207. config PCI_HOST_VIA82C505
  1208. bool
  1209. depends on PCI && ARCH_SHARK
  1210. default y
  1211. config PCI_HOST_ITE8152
  1212. bool
  1213. depends on PCI && MACH_ARMCORE
  1214. default y
  1215. select DMABOUNCE
  1216. source "drivers/pci/Kconfig"
  1217. source "drivers/pcmcia/Kconfig"
  1218. endmenu
  1219. menu "Kernel Features"
  1220. source "kernel/time/Kconfig"
  1221. config SMP
  1222. bool "Symmetric Multi-Processing"
  1223. depends on CPU_V6K || CPU_V7
  1224. depends on GENERIC_CLOCKEVENTS
  1225. depends on REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP || \
  1226. MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || \
  1227. ARCH_EXYNOS4 || ARCH_TEGRA || ARCH_U8500 || ARCH_VEXPRESS_CA9X4 || \
  1228. ARCH_MSM_SCORPIONMP || ARCH_SHMOBILE || ARCH_HIGHBANK || SOC_IMX6Q
  1229. depends on MMU
  1230. select USE_GENERIC_SMP_HELPERS
  1231. select HAVE_ARM_SCU if !ARCH_MSM_SCORPIONMP
  1232. help
  1233. This enables support for systems with more than one CPU. If you have
  1234. a system with only one CPU, like most personal computers, say N. If
  1235. you have a system with more than one CPU, say Y.
  1236. If you say N here, the kernel will run on single and multiprocessor
  1237. machines, but will use only one CPU of a multiprocessor machine. If
  1238. you say Y here, the kernel will run on many, but not all, single
  1239. processor machines. On a single processor machine, the kernel will
  1240. run faster if you say N here.
  1241. See also <file:Documentation/x86/i386/IO-APIC.txt>,
  1242. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  1243. <http://tldp.org/HOWTO/SMP-HOWTO.html>.
  1244. If you don't know what to do here, say N.
  1245. config SMP_ON_UP
  1246. bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
  1247. depends on EXPERIMENTAL
  1248. depends on SMP && !XIP_KERNEL
  1249. default y
  1250. help
  1251. SMP kernels contain instructions which fail on non-SMP processors.
  1252. Enabling this option allows the kernel to modify itself to make
  1253. these instructions safe. Disabling it allows about 1K of space
  1254. savings.
  1255. If you don't know what to do here, say Y.
  1256. config ARM_CPU_TOPOLOGY
  1257. bool "Support cpu topology definition"
  1258. depends on SMP && CPU_V7
  1259. default y
  1260. help
  1261. Support ARM cpu topology definition. The MPIDR register defines
  1262. affinity between processors which is then used to describe the cpu
  1263. topology of an ARM System.
  1264. config SCHED_MC
  1265. bool "Multi-core scheduler support"
  1266. depends on ARM_CPU_TOPOLOGY
  1267. help
  1268. Multi-core scheduler support improves the CPU scheduler's decision
  1269. making when dealing with multi-core CPU chips at a cost of slightly
  1270. increased overhead in some places. If unsure say N here.
  1271. config SCHED_SMT
  1272. bool "SMT scheduler support"
  1273. depends on ARM_CPU_TOPOLOGY
  1274. help
  1275. Improves the CPU scheduler's decision making when dealing with
  1276. MultiThreading at a cost of slightly increased overhead in some
  1277. places. If unsure say N here.
  1278. config HAVE_ARM_SCU
  1279. bool
  1280. help
  1281. This option enables support for the ARM system coherency unit
  1282. config HAVE_ARM_TWD
  1283. bool
  1284. depends on SMP
  1285. select TICK_ONESHOT
  1286. help
  1287. This options enables support for the ARM timer and watchdog unit
  1288. choice
  1289. prompt "Memory split"
  1290. default VMSPLIT_3G
  1291. help
  1292. Select the desired split between kernel and user memory.
  1293. If you are not absolutely sure what you are doing, leave this
  1294. option alone!
  1295. config VMSPLIT_3G
  1296. bool "3G/1G user/kernel split"
  1297. config VMSPLIT_2G
  1298. bool "2G/2G user/kernel split"
  1299. config VMSPLIT_1G
  1300. bool "1G/3G user/kernel split"
  1301. endchoice
  1302. config PAGE_OFFSET
  1303. hex
  1304. default 0x40000000 if VMSPLIT_1G
  1305. default 0x80000000 if VMSPLIT_2G
  1306. default 0xC0000000
  1307. config NR_CPUS
  1308. int "Maximum number of CPUs (2-32)"
  1309. range 2 32
  1310. depends on SMP
  1311. default "4"
  1312. config HOTPLUG_CPU
  1313. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  1314. depends on SMP && HOTPLUG && EXPERIMENTAL
  1315. help
  1316. Say Y here to experiment with turning CPUs off and on. CPUs
  1317. can be controlled through /sys/devices/system/cpu.
  1318. config LOCAL_TIMERS
  1319. bool "Use local timer interrupts"
  1320. depends on SMP
  1321. default y
  1322. select HAVE_ARM_TWD if (!ARCH_MSM_SCORPIONMP && !EXYNOS4_MCT)
  1323. help
  1324. Enable support for local timers on SMP platforms, rather then the
  1325. legacy IPI broadcast method. Local timers allows the system
  1326. accounting to be spread across the timer interval, preventing a
  1327. "thundering herd" at every timer tick.
  1328. source kernel/Kconfig.preempt
  1329. config HZ
  1330. int
  1331. default 200 if ARCH_EBSA110 || ARCH_S3C2410 || ARCH_S5P64X0 || \
  1332. ARCH_S5PV210 || ARCH_EXYNOS4
  1333. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  1334. default AT91_TIMER_HZ if ARCH_AT91
  1335. default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
  1336. default 100
  1337. config THUMB2_KERNEL
  1338. bool "Compile the kernel in Thumb-2 mode (EXPERIMENTAL)"
  1339. depends on CPU_V7 && !CPU_V6 && !CPU_V6K && EXPERIMENTAL
  1340. select AEABI
  1341. select ARM_ASM_UNIFIED
  1342. select ARM_UNWIND
  1343. help
  1344. By enabling this option, the kernel will be compiled in
  1345. Thumb-2 mode. A compiler/assembler that understand the unified
  1346. ARM-Thumb syntax is needed.
  1347. If unsure, say N.
  1348. config THUMB2_AVOID_R_ARM_THM_JUMP11
  1349. bool "Work around buggy Thumb-2 short branch relocations in gas"
  1350. depends on THUMB2_KERNEL && MODULES
  1351. default y
  1352. help
  1353. Various binutils versions can resolve Thumb-2 branches to
  1354. locally-defined, preemptible global symbols as short-range "b.n"
  1355. branch instructions.
  1356. This is a problem, because there's no guarantee the final
  1357. destination of the symbol, or any candidate locations for a
  1358. trampoline, are within range of the branch. For this reason, the
  1359. kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
  1360. relocation in modules at all, and it makes little sense to add
  1361. support.
  1362. The symptom is that the kernel fails with an "unsupported
  1363. relocation" error when loading some modules.
  1364. Until fixed tools are available, passing
  1365. -fno-optimize-sibling-calls to gcc should prevent gcc generating
  1366. code which hits this problem, at the cost of a bit of extra runtime
  1367. stack usage in some cases.
  1368. The problem is described in more detail at:
  1369. https://bugs.launchpad.net/binutils-linaro/+bug/725126
  1370. Only Thumb-2 kernels are affected.
  1371. Unless you are sure your tools don't have this problem, say Y.
  1372. config ARM_ASM_UNIFIED
  1373. bool
  1374. config AEABI
  1375. bool "Use the ARM EABI to compile the kernel"
  1376. help
  1377. This option allows for the kernel to be compiled using the latest
  1378. ARM ABI (aka EABI). This is only useful if you are using a user
  1379. space environment that is also compiled with EABI.
  1380. Since there are major incompatibilities between the legacy ABI and
  1381. EABI, especially with regard to structure member alignment, this
  1382. option also changes the kernel syscall calling convention to
  1383. disambiguate both ABIs and allow for backward compatibility support
  1384. (selected with CONFIG_OABI_COMPAT).
  1385. To use this you need GCC version 4.0.0 or later.
  1386. config OABI_COMPAT
  1387. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  1388. depends on AEABI && EXPERIMENTAL && !THUMB2_KERNEL
  1389. default y
  1390. help
  1391. This option preserves the old syscall interface along with the
  1392. new (ARM EABI) one. It also provides a compatibility layer to
  1393. intercept syscalls that have structure arguments which layout
  1394. in memory differs between the legacy ABI and the new ARM EABI
  1395. (only for non "thumb" binaries). This option adds a tiny
  1396. overhead to all syscalls and produces a slightly larger kernel.
  1397. If you know you'll be using only pure EABI user space then you
  1398. can say N here. If this option is not selected and you attempt
  1399. to execute a legacy ABI binary then the result will be
  1400. UNPREDICTABLE (in fact it can be predicted that it won't work
  1401. at all). If in doubt say Y.
  1402. config ARCH_HAS_HOLES_MEMORYMODEL
  1403. bool
  1404. config ARCH_SPARSEMEM_ENABLE
  1405. bool
  1406. config ARCH_SPARSEMEM_DEFAULT
  1407. def_bool ARCH_SPARSEMEM_ENABLE
  1408. config ARCH_SELECT_MEMORY_MODEL
  1409. def_bool ARCH_SPARSEMEM_ENABLE
  1410. config HAVE_ARCH_PFN_VALID
  1411. def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
  1412. config HIGHMEM
  1413. bool "High Memory Support"
  1414. depends on MMU
  1415. help
  1416. The address space of ARM processors is only 4 Gigabytes large
  1417. and it has to accommodate user address space, kernel address
  1418. space as well as some memory mapped IO. That means that, if you
  1419. have a large amount of physical memory and/or IO, not all of the
  1420. memory can be "permanently mapped" by the kernel. The physical
  1421. memory that is not permanently mapped is called "high memory".
  1422. Depending on the selected kernel/user memory split, minimum
  1423. vmalloc space and actual amount of RAM, you may not need this
  1424. option which should result in a slightly faster kernel.
  1425. If unsure, say n.
  1426. config HIGHPTE
  1427. bool "Allocate 2nd-level pagetables from highmem"
  1428. depends on HIGHMEM
  1429. config HW_PERF_EVENTS
  1430. bool "Enable hardware performance counter support for perf events"
  1431. depends on PERF_EVENTS && CPU_HAS_PMU
  1432. default y
  1433. help
  1434. Enable hardware performance counter support for perf events. If
  1435. disabled, perf events will use software events only.
  1436. source "mm/Kconfig"
  1437. config FORCE_MAX_ZONEORDER
  1438. int "Maximum zone order" if ARCH_SHMOBILE
  1439. range 11 64 if ARCH_SHMOBILE
  1440. default "9" if SA1111
  1441. default "11"
  1442. help
  1443. The kernel memory allocator divides physically contiguous memory
  1444. blocks into "zones", where each zone is a power of two number of
  1445. pages. This option selects the largest power of two that the kernel
  1446. keeps in the memory allocator. If you need to allocate very large
  1447. blocks of physically contiguous memory, then you may need to
  1448. increase this value.
  1449. This config option is actually maximum order plus one. For example,
  1450. a value of 11 means that the largest free memory block is 2^10 pages.
  1451. config LEDS
  1452. bool "Timer and CPU usage LEDs"
  1453. depends on ARCH_CDB89712 || ARCH_EBSA110 || \
  1454. ARCH_EBSA285 || ARCH_INTEGRATOR || \
  1455. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  1456. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  1457. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  1458. ARCH_AT91 || ARCH_DAVINCI || \
  1459. ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
  1460. help
  1461. If you say Y here, the LEDs on your machine will be used
  1462. to provide useful information about your current system status.
  1463. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  1464. be able to select which LEDs are active using the options below. If
  1465. you are compiling a kernel for the EBSA-110 or the LART however, the
  1466. red LED will simply flash regularly to indicate that the system is
  1467. still functional. It is safe to say Y here if you have a CATS
  1468. system, but the driver will do nothing.
  1469. config LEDS_TIMER
  1470. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  1471. OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1472. || MACH_OMAP_PERSEUS2
  1473. depends on LEDS
  1474. depends on !GENERIC_CLOCKEVENTS
  1475. default y if ARCH_EBSA110
  1476. help
  1477. If you say Y here, one of the system LEDs (the green one on the
  1478. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  1479. will flash regularly to indicate that the system is still
  1480. operational. This is mainly useful to kernel hackers who are
  1481. debugging unstable kernels.
  1482. The LART uses the same LED for both Timer LED and CPU usage LED
  1483. functions. You may choose to use both, but the Timer LED function
  1484. will overrule the CPU usage LED.
  1485. config LEDS_CPU
  1486. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  1487. !ARCH_OMAP) \
  1488. || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1489. || MACH_OMAP_PERSEUS2
  1490. depends on LEDS
  1491. help
  1492. If you say Y here, the red LED will be used to give a good real
  1493. time indication of CPU usage, by lighting whenever the idle task
  1494. is not currently executing.
  1495. The LART uses the same LED for both Timer LED and CPU usage LED
  1496. functions. You may choose to use both, but the Timer LED function
  1497. will overrule the CPU usage LED.
  1498. config ALIGNMENT_TRAP
  1499. bool
  1500. depends on CPU_CP15_MMU
  1501. default y if !ARCH_EBSA110
  1502. select HAVE_PROC_CPU if PROC_FS
  1503. help
  1504. ARM processors cannot fetch/store information which is not
  1505. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  1506. address divisible by 4. On 32-bit ARM processors, these non-aligned
  1507. fetch/store instructions will be emulated in software if you say
  1508. here, which has a severe performance impact. This is necessary for
  1509. correct operation of some network protocols. With an IP-only
  1510. configuration it is safe to say N, otherwise say Y.
  1511. config UACCESS_WITH_MEMCPY
  1512. bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
  1513. depends on MMU && EXPERIMENTAL
  1514. default y if CPU_FEROCEON
  1515. help
  1516. Implement faster copy_to_user and clear_user methods for CPU
  1517. cores where a 8-word STM instruction give significantly higher
  1518. memory write throughput than a sequence of individual 32bit stores.
  1519. A possible side effect is a slight increase in scheduling latency
  1520. between threads sharing the same address space if they invoke
  1521. such copy operations with large buffers.
  1522. However, if the CPU data cache is using a write-allocate mode,
  1523. this option is unlikely to provide any performance gain.
  1524. config SECCOMP
  1525. bool
  1526. prompt "Enable seccomp to safely compute untrusted bytecode"
  1527. ---help---
  1528. This kernel feature is useful for number crunching applications
  1529. that may need to compute untrusted bytecode during their
  1530. execution. By using pipes or other transports made available to
  1531. the process as file descriptors supporting the read/write
  1532. syscalls, it's possible to isolate those applications in
  1533. their own address space using seccomp. Once seccomp is
  1534. enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
  1535. and the task is only allowed to execute a few safe syscalls
  1536. defined by each seccomp mode.
  1537. config CC_STACKPROTECTOR
  1538. bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
  1539. depends on EXPERIMENTAL
  1540. help
  1541. This option turns on the -fstack-protector GCC feature. This
  1542. feature puts, at the beginning of functions, a canary value on
  1543. the stack just before the return address, and validates
  1544. the value just before actually returning. Stack based buffer
  1545. overflows (that need to overwrite this return address) now also
  1546. overwrite the canary, which gets detected and the attack is then
  1547. neutralized via a kernel panic.
  1548. This feature requires gcc version 4.2 or above.
  1549. config DEPRECATED_PARAM_STRUCT
  1550. bool "Provide old way to pass kernel parameters"
  1551. help
  1552. This was deprecated in 2001 and announced to live on for 5 years.
  1553. Some old boot loaders still use this way.
  1554. endmenu
  1555. menu "Boot options"
  1556. config USE_OF
  1557. bool "Flattened Device Tree support"
  1558. select OF
  1559. select OF_EARLY_FLATTREE
  1560. select IRQ_DOMAIN
  1561. help
  1562. Include support for flattened device tree machine descriptions.
  1563. # Compressed boot loader in ROM. Yes, we really want to ask about
  1564. # TEXT and BSS so we preserve their values in the config files.
  1565. config ZBOOT_ROM_TEXT
  1566. hex "Compressed ROM boot loader base address"
  1567. default "0"
  1568. help
  1569. The physical address at which the ROM-able zImage is to be
  1570. placed in the target. Platforms which normally make use of
  1571. ROM-able zImage formats normally set this to a suitable
  1572. value in their defconfig file.
  1573. If ZBOOT_ROM is not enabled, this has no effect.
  1574. config ZBOOT_ROM_BSS
  1575. hex "Compressed ROM boot loader BSS address"
  1576. default "0"
  1577. help
  1578. The base address of an area of read/write memory in the target
  1579. for the ROM-able zImage which must be available while the
  1580. decompressor is running. It must be large enough to hold the
  1581. entire decompressed kernel plus an additional 128 KiB.
  1582. Platforms which normally make use of ROM-able zImage formats
  1583. normally set this to a suitable value in their defconfig file.
  1584. If ZBOOT_ROM is not enabled, this has no effect.
  1585. config ZBOOT_ROM
  1586. bool "Compressed boot loader in ROM/flash"
  1587. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  1588. help
  1589. Say Y here if you intend to execute your compressed kernel image
  1590. (zImage) directly from ROM or flash. If unsure, say N.
  1591. choice
  1592. prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)"
  1593. depends on ZBOOT_ROM && ARCH_SH7372 && EXPERIMENTAL
  1594. default ZBOOT_ROM_NONE
  1595. help
  1596. Include experimental SD/MMC loading code in the ROM-able zImage.
  1597. With this enabled it is possible to write the the ROM-able zImage
  1598. kernel image to an MMC or SD card and boot the kernel straight
  1599. from the reset vector. At reset the processor Mask ROM will load
  1600. the first part of the the ROM-able zImage which in turn loads the
  1601. rest the kernel image to RAM.
  1602. config ZBOOT_ROM_NONE
  1603. bool "No SD/MMC loader in zImage (EXPERIMENTAL)"
  1604. help
  1605. Do not load image from SD or MMC
  1606. config ZBOOT_ROM_MMCIF
  1607. bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
  1608. help
  1609. Load image from MMCIF hardware block.
  1610. config ZBOOT_ROM_SH_MOBILE_SDHI
  1611. bool "Include SuperH Mobile SDHI loader in zImage (EXPERIMENTAL)"
  1612. help
  1613. Load image from SDHI hardware block
  1614. endchoice
  1615. config ARM_APPENDED_DTB
  1616. bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
  1617. depends on OF && !ZBOOT_ROM && EXPERIMENTAL
  1618. help
  1619. With this option, the boot code will look for a device tree binary
  1620. (DTB) appended to zImage
  1621. (e.g. cat zImage <filename>.dtb > zImage_w_dtb).
  1622. This is meant as a backward compatibility convenience for those
  1623. systems with a bootloader that can't be upgraded to accommodate
  1624. the documented boot protocol using a device tree.
  1625. Beware that there is very little in terms of protection against
  1626. this option being confused by leftover garbage in memory that might
  1627. look like a DTB header after a reboot if no actual DTB is appended
  1628. to zImage. Do not leave this option active in a production kernel
  1629. if you don't intend to always append a DTB. Proper passing of the
  1630. location into r2 of a bootloader provided DTB is always preferable
  1631. to this option.
  1632. config ARM_ATAG_DTB_COMPAT
  1633. bool "Supplement the appended DTB with traditional ATAG information"
  1634. depends on ARM_APPENDED_DTB
  1635. help
  1636. Some old bootloaders can't be updated to a DTB capable one, yet
  1637. they provide ATAGs with memory configuration, the ramdisk address,
  1638. the kernel cmdline string, etc. Such information is dynamically
  1639. provided by the bootloader and can't always be stored in a static
  1640. DTB. To allow a device tree enabled kernel to be used with such
  1641. bootloaders, this option allows zImage to extract the information
  1642. from the ATAG list and store it at run time into the appended DTB.
  1643. config CMDLINE
  1644. string "Default kernel command string"
  1645. default ""
  1646. help
  1647. On some architectures (EBSA110 and CATS), there is currently no way
  1648. for the boot loader to pass arguments to the kernel. For these
  1649. architectures, you should supply some command-line options at build
  1650. time by entering them here. As a minimum, you should specify the
  1651. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  1652. choice
  1653. prompt "Kernel command line type" if CMDLINE != ""
  1654. default CMDLINE_FROM_BOOTLOADER
  1655. config CMDLINE_FROM_BOOTLOADER
  1656. bool "Use bootloader kernel arguments if available"
  1657. help
  1658. Uses the command-line options passed by the boot loader. If
  1659. the boot loader doesn't provide any, the default kernel command
  1660. string provided in CMDLINE will be used.
  1661. config CMDLINE_EXTEND
  1662. bool "Extend bootloader kernel arguments"
  1663. help
  1664. The command-line arguments provided by the boot loader will be
  1665. appended to the default kernel command string.
  1666. config CMDLINE_FORCE
  1667. bool "Always use the default kernel command string"
  1668. help
  1669. Always use the default kernel command string, even if the boot
  1670. loader passes other arguments to the kernel.
  1671. This is useful if you cannot or don't want to change the
  1672. command-line options your boot loader passes to the kernel.
  1673. endchoice
  1674. config XIP_KERNEL
  1675. bool "Kernel Execute-In-Place from ROM"
  1676. depends on !ZBOOT_ROM
  1677. help
  1678. Execute-In-Place allows the kernel to run from non-volatile storage
  1679. directly addressable by the CPU, such as NOR flash. This saves RAM
  1680. space since the text section of the kernel is not loaded from flash
  1681. to RAM. Read-write sections, such as the data section and stack,
  1682. are still copied to RAM. The XIP kernel is not compressed since
  1683. it has to run directly from flash, so it will take more space to
  1684. store it. The flash address used to link the kernel object files,
  1685. and for storing it, is configuration dependent. Therefore, if you
  1686. say Y here, you must know the proper physical address where to
  1687. store the kernel image depending on your own flash memory usage.
  1688. Also note that the make target becomes "make xipImage" rather than
  1689. "make zImage" or "make Image". The final kernel binary to put in
  1690. ROM memory will be arch/arm/boot/xipImage.
  1691. If unsure, say N.
  1692. config XIP_PHYS_ADDR
  1693. hex "XIP Kernel Physical Location"
  1694. depends on XIP_KERNEL
  1695. default "0x00080000"
  1696. help
  1697. This is the physical address in your flash memory the kernel will
  1698. be linked for and stored to. This address is dependent on your
  1699. own flash usage.
  1700. config KEXEC
  1701. bool "Kexec system call (EXPERIMENTAL)"
  1702. depends on EXPERIMENTAL
  1703. help
  1704. kexec is a system call that implements the ability to shutdown your
  1705. current kernel, and to start another kernel. It is like a reboot
  1706. but it is independent of the system firmware. And like a reboot
  1707. you can start any kernel with it, not just Linux.
  1708. It is an ongoing process to be certain the hardware in a machine
  1709. is properly shutdown, so do not be surprised if this code does not
  1710. initially work for you. It may help to enable device hotplugging
  1711. support.
  1712. config ATAGS_PROC
  1713. bool "Export atags in procfs"
  1714. depends on KEXEC
  1715. default y
  1716. help
  1717. Should the atags used to boot the kernel be exported in an "atags"
  1718. file in procfs. Useful with kexec.
  1719. config CRASH_DUMP
  1720. bool "Build kdump crash kernel (EXPERIMENTAL)"
  1721. depends on EXPERIMENTAL
  1722. help
  1723. Generate crash dump after being started by kexec. This should
  1724. be normally only set in special crash dump kernels which are
  1725. loaded in the main kernel with kexec-tools into a specially
  1726. reserved region and then later executed after a crash by
  1727. kdump/kexec. The crash dump kernel must be compiled to a
  1728. memory address not used by the main kernel
  1729. For more details see Documentation/kdump/kdump.txt
  1730. config AUTO_ZRELADDR
  1731. bool "Auto calculation of the decompressed kernel image address"
  1732. depends on !ZBOOT_ROM && !ARCH_U300
  1733. help
  1734. ZRELADDR is the physical address where the decompressed kernel
  1735. image will be placed. If AUTO_ZRELADDR is selected, the address
  1736. will be determined at run-time by masking the current IP with
  1737. 0xf8000000. This assumes the zImage being placed in the first 128MB
  1738. from start of memory.
  1739. endmenu
  1740. menu "CPU Power Management"
  1741. if ARCH_HAS_CPUFREQ
  1742. source "drivers/cpufreq/Kconfig"
  1743. config CPU_FREQ_IMX
  1744. tristate "CPUfreq driver for i.MX CPUs"
  1745. depends on ARCH_MXC && CPU_FREQ
  1746. help
  1747. This enables the CPUfreq driver for i.MX CPUs.
  1748. config CPU_FREQ_SA1100
  1749. bool
  1750. config CPU_FREQ_SA1110
  1751. bool
  1752. config CPU_FREQ_INTEGRATOR
  1753. tristate "CPUfreq driver for ARM Integrator CPUs"
  1754. depends on ARCH_INTEGRATOR && CPU_FREQ
  1755. default y
  1756. help
  1757. This enables the CPUfreq driver for ARM Integrator CPUs.
  1758. For details, take a look at <file:Documentation/cpu-freq>.
  1759. If in doubt, say Y.
  1760. config CPU_FREQ_PXA
  1761. bool
  1762. depends on CPU_FREQ && ARCH_PXA && PXA25x
  1763. default y
  1764. select CPU_FREQ_TABLE
  1765. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  1766. config CPU_FREQ_S3C
  1767. bool
  1768. help
  1769. Internal configuration node for common cpufreq on Samsung SoC
  1770. config CPU_FREQ_S3C24XX
  1771. bool "CPUfreq driver for Samsung S3C24XX series CPUs (EXPERIMENTAL)"
  1772. depends on ARCH_S3C2410 && CPU_FREQ && EXPERIMENTAL
  1773. select CPU_FREQ_S3C
  1774. help
  1775. This enables the CPUfreq driver for the Samsung S3C24XX family
  1776. of CPUs.
  1777. For details, take a look at <file:Documentation/cpu-freq>.
  1778. If in doubt, say N.
  1779. config CPU_FREQ_S3C24XX_PLL
  1780. bool "Support CPUfreq changing of PLL frequency (EXPERIMENTAL)"
  1781. depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
  1782. help
  1783. Compile in support for changing the PLL frequency from the
  1784. S3C24XX series CPUfreq driver. The PLL takes time to settle
  1785. after a frequency change, so by default it is not enabled.
  1786. This also means that the PLL tables for the selected CPU(s) will
  1787. be built which may increase the size of the kernel image.
  1788. config CPU_FREQ_S3C24XX_DEBUG
  1789. bool "Debug CPUfreq Samsung driver core"
  1790. depends on CPU_FREQ_S3C24XX
  1791. help
  1792. Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
  1793. config CPU_FREQ_S3C24XX_IODEBUG
  1794. bool "Debug CPUfreq Samsung driver IO timing"
  1795. depends on CPU_FREQ_S3C24XX
  1796. help
  1797. Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
  1798. config CPU_FREQ_S3C24XX_DEBUGFS
  1799. bool "Export debugfs for CPUFreq"
  1800. depends on CPU_FREQ_S3C24XX && DEBUG_FS
  1801. help
  1802. Export status information via debugfs.
  1803. endif
  1804. source "drivers/cpuidle/Kconfig"
  1805. endmenu
  1806. menu "Floating point emulation"
  1807. comment "At least one emulation must be selected"
  1808. config FPE_NWFPE
  1809. bool "NWFPE math emulation"
  1810. depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
  1811. ---help---
  1812. Say Y to include the NWFPE floating point emulator in the kernel.
  1813. This is necessary to run most binaries. Linux does not currently
  1814. support floating point hardware so you need to say Y here even if
  1815. your machine has an FPA or floating point co-processor podule.
  1816. You may say N here if you are going to load the Acorn FPEmulator
  1817. early in the bootup.
  1818. config FPE_NWFPE_XP
  1819. bool "Support extended precision"
  1820. depends on FPE_NWFPE
  1821. help
  1822. Say Y to include 80-bit support in the kernel floating-point
  1823. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  1824. Note that gcc does not generate 80-bit operations by default,
  1825. so in most cases this option only enlarges the size of the
  1826. floating point emulator without any good reason.
  1827. You almost surely want to say N here.
  1828. config FPE_FASTFPE
  1829. bool "FastFPE math emulation (EXPERIMENTAL)"
  1830. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  1831. ---help---
  1832. Say Y here to include the FAST floating point emulator in the kernel.
  1833. This is an experimental much faster emulator which now also has full
  1834. precision for the mantissa. It does not support any exceptions.
  1835. It is very simple, and approximately 3-6 times faster than NWFPE.
  1836. It should be sufficient for most programs. It may be not suitable
  1837. for scientific calculations, but you have to check this for yourself.
  1838. If you do not feel you need a faster FP emulation you should better
  1839. choose NWFPE.
  1840. config VFP
  1841. bool "VFP-format floating point maths"
  1842. depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  1843. help
  1844. Say Y to include VFP support code in the kernel. This is needed
  1845. if your hardware includes a VFP unit.
  1846. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  1847. release notes and additional status information.
  1848. Say N if your target does not have VFP hardware.
  1849. config VFPv3
  1850. bool
  1851. depends on VFP
  1852. default y if CPU_V7
  1853. config NEON
  1854. bool "Advanced SIMD (NEON) Extension support"
  1855. depends on VFPv3 && CPU_V7
  1856. help
  1857. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  1858. Extension.
  1859. endmenu
  1860. menu "Userspace binary formats"
  1861. source "fs/Kconfig.binfmt"
  1862. config ARTHUR
  1863. tristate "RISC OS personality"
  1864. depends on !AEABI
  1865. help
  1866. Say Y here to include the kernel code necessary if you want to run
  1867. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  1868. experimental; if this sounds frightening, say N and sleep in peace.
  1869. You can also say M here to compile this support as a module (which
  1870. will be called arthur).
  1871. endmenu
  1872. menu "Power management options"
  1873. source "kernel/power/Kconfig"
  1874. config ARCH_SUSPEND_POSSIBLE
  1875. depends on !ARCH_S5PC100
  1876. depends on CPU_ARM920T || CPU_ARM926T || CPU_SA1100 || \
  1877. CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE
  1878. def_bool y
  1879. config ARM_CPU_SUSPEND
  1880. def_bool PM_SLEEP
  1881. endmenu
  1882. source "net/Kconfig"
  1883. source "drivers/Kconfig"
  1884. source "fs/Kconfig"
  1885. source "arch/arm/Kconfig.debug"
  1886. source "security/Kconfig"
  1887. source "crypto/Kconfig"
  1888. source "lib/Kconfig"