Kconfig 65 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_JUMP_LABEL if !XIP_KERNEL
  13. select HAVE_ARCH_KGDB
  14. select HAVE_ARCH_TRACEHOOK
  15. select HAVE_KPROBES if !XIP_KERNEL
  16. select HAVE_KRETPROBES if (HAVE_KPROBES)
  17. select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
  18. select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
  19. select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL)
  20. select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL)
  21. select ARCH_BINFMT_ELF_RANDOMIZE_PIE
  22. select HAVE_GENERIC_DMA_COHERENT
  23. select HAVE_KERNEL_GZIP
  24. select HAVE_KERNEL_LZO
  25. select HAVE_KERNEL_LZMA
  26. select HAVE_KERNEL_XZ
  27. select HAVE_IRQ_WORK
  28. select HAVE_PERF_EVENTS
  29. select PERF_USE_VMALLOC
  30. select HAVE_REGS_AND_STACK_ACCESS_API
  31. select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7))
  32. select HAVE_C_RECORDMCOUNT
  33. select HAVE_GENERIC_HARDIRQS
  34. select HARDIRQS_SW_RESEND
  35. select GENERIC_IRQ_PROBE
  36. select GENERIC_IRQ_SHOW
  37. select CPU_PM if (SUSPEND || CPU_IDLE)
  38. select GENERIC_PCI_IOMAP
  39. select HAVE_BPF_JIT if NET
  40. help
  41. The ARM series is a line of low-power-consumption RISC chip designs
  42. licensed by ARM Ltd and targeted at embedded applications and
  43. handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
  44. manufactured, but legacy ARM-based PC hardware remains popular in
  45. Europe. There is an ARM Linux project with a web page at
  46. <http://www.arm.linux.org.uk/>.
  47. config ARM_HAS_SG_CHAIN
  48. bool
  49. config HAVE_PWM
  50. bool
  51. config MIGHT_HAVE_PCI
  52. bool
  53. config SYS_SUPPORTS_APM_EMULATION
  54. bool
  55. config GENERIC_GPIO
  56. bool
  57. config ARCH_USES_GETTIMEOFFSET
  58. bool
  59. default n
  60. config GENERIC_CLOCKEVENTS
  61. bool
  62. config GENERIC_CLOCKEVENTS_BROADCAST
  63. bool
  64. depends on GENERIC_CLOCKEVENTS
  65. default y if SMP
  66. config KTIME_SCALAR
  67. bool
  68. default y
  69. config HAVE_TCM
  70. bool
  71. select GENERIC_ALLOCATOR
  72. config HAVE_PROC_CPU
  73. bool
  74. config NO_IOPORT
  75. bool
  76. config EISA
  77. bool
  78. ---help---
  79. The Extended Industry Standard Architecture (EISA) bus was
  80. developed as an open alternative to the IBM MicroChannel bus.
  81. The EISA bus provided some of the features of the IBM MicroChannel
  82. bus while maintaining backward compatibility with cards made for
  83. the older ISA bus. The EISA bus saw limited use between 1988 and
  84. 1995 when it was made obsolete by the PCI bus.
  85. Say Y here if you are building a kernel for an EISA-based machine.
  86. Otherwise, say N.
  87. config SBUS
  88. bool
  89. config MCA
  90. bool
  91. help
  92. MicroChannel Architecture is found in some IBM PS/2 machines and
  93. laptops. It is a bus system similar to PCI or ISA. See
  94. <file:Documentation/mca.txt> (and especially the web page given
  95. there) before attempting to build an MCA bus kernel.
  96. config STACKTRACE_SUPPORT
  97. bool
  98. default y
  99. config HAVE_LATENCYTOP_SUPPORT
  100. bool
  101. depends on !SMP
  102. default y
  103. config LOCKDEP_SUPPORT
  104. bool
  105. default y
  106. config TRACE_IRQFLAGS_SUPPORT
  107. bool
  108. default y
  109. config GENERIC_LOCKBREAK
  110. bool
  111. default y
  112. depends on SMP && PREEMPT
  113. config RWSEM_GENERIC_SPINLOCK
  114. bool
  115. default y
  116. config RWSEM_XCHGADD_ALGORITHM
  117. bool
  118. config ARCH_HAS_ILOG2_U32
  119. bool
  120. config ARCH_HAS_ILOG2_U64
  121. bool
  122. config ARCH_HAS_CPUFREQ
  123. bool
  124. help
  125. Internal node to signify that the ARCH has CPUFREQ support
  126. and that the relevant menu configurations are displayed for
  127. it.
  128. config ARCH_HAS_CPU_IDLE_WAIT
  129. def_bool y
  130. config GENERIC_HWEIGHT
  131. bool
  132. default y
  133. config GENERIC_CALIBRATE_DELAY
  134. bool
  135. default y
  136. config ARCH_MAY_HAVE_PC_FDC
  137. bool
  138. config ZONE_DMA
  139. bool
  140. config NEED_DMA_MAP_STATE
  141. def_bool y
  142. config ARCH_HAS_DMA_SET_COHERENT_MASK
  143. bool
  144. config GENERIC_ISA_DMA
  145. bool
  146. config FIQ
  147. bool
  148. config NEED_RET_TO_USER
  149. bool
  150. config ARCH_MTD_XIP
  151. bool
  152. config VECTORS_BASE
  153. hex
  154. default 0xffff0000 if MMU || CPU_HIGH_VECTOR
  155. default DRAM_BASE if REMAP_VECTORS_TO_RAM
  156. default 0x00000000
  157. help
  158. The base address of exception vectors.
  159. config ARM_PATCH_PHYS_VIRT
  160. bool "Patch physical to virtual translations at runtime" if EMBEDDED
  161. default y
  162. depends on !XIP_KERNEL && MMU
  163. depends on !ARCH_REALVIEW || !SPARSEMEM
  164. help
  165. Patch phys-to-virt and virt-to-phys translation functions at
  166. boot and module load time according to the position of the
  167. kernel in system memory.
  168. This can only be used with non-XIP MMU kernels where the base
  169. of physical memory is at a 16MB boundary.
  170. Only disable this option if you know that you do not require
  171. this feature (eg, building a kernel for a single machine) and
  172. you need to shrink the kernel to the minimal size.
  173. config NEED_MACH_IO_H
  174. bool
  175. help
  176. Select this when mach/io.h is required to provide special
  177. definitions for this platform. The need for mach/io.h should
  178. be avoided when possible.
  179. config NEED_MACH_MEMORY_H
  180. bool
  181. help
  182. Select this when mach/memory.h is required to provide special
  183. definitions for this platform. The need for mach/memory.h should
  184. be avoided when possible.
  185. config PHYS_OFFSET
  186. hex "Physical address of main memory" if MMU
  187. depends on !ARM_PATCH_PHYS_VIRT && !NEED_MACH_MEMORY_H
  188. default DRAM_BASE if !MMU
  189. help
  190. Please provide the physical address corresponding to the
  191. location of main memory in your system.
  192. config GENERIC_BUG
  193. def_bool y
  194. depends on BUG
  195. source "init/Kconfig"
  196. source "kernel/Kconfig.freezer"
  197. menu "System Type"
  198. config MMU
  199. bool "MMU-based Paged Memory Management Support"
  200. default y
  201. help
  202. Select if you want MMU-based virtualised addressing space
  203. support by paged memory management. If unsure, say 'Y'.
  204. #
  205. # The "ARM system type" choice list is ordered alphabetically by option
  206. # text. Please add new entries in the option alphabetic order.
  207. #
  208. choice
  209. prompt "ARM system type"
  210. default ARCH_VERSATILE
  211. config ARCH_INTEGRATOR
  212. bool "ARM Ltd. Integrator family"
  213. select ARM_AMBA
  214. select ARCH_HAS_CPUFREQ
  215. select CLKDEV_LOOKUP
  216. select HAVE_MACH_CLKDEV
  217. select HAVE_TCM
  218. select ICST
  219. select GENERIC_CLOCKEVENTS
  220. select PLAT_VERSATILE
  221. select PLAT_VERSATILE_FPGA_IRQ
  222. select NEED_MACH_IO_H
  223. select NEED_MACH_MEMORY_H
  224. select SPARSE_IRQ
  225. help
  226. Support for ARM's Integrator platform.
  227. config ARCH_REALVIEW
  228. bool "ARM Ltd. RealView family"
  229. select ARM_AMBA
  230. select CLKDEV_LOOKUP
  231. select HAVE_MACH_CLKDEV
  232. select ICST
  233. select GENERIC_CLOCKEVENTS
  234. select ARCH_WANT_OPTIONAL_GPIOLIB
  235. select PLAT_VERSATILE
  236. select PLAT_VERSATILE_CLCD
  237. select ARM_TIMER_SP804
  238. select GPIO_PL061 if GPIOLIB
  239. select NEED_MACH_MEMORY_H
  240. help
  241. This enables support for ARM Ltd RealView boards.
  242. config ARCH_VERSATILE
  243. bool "ARM Ltd. Versatile family"
  244. select ARM_AMBA
  245. select ARM_VIC
  246. select CLKDEV_LOOKUP
  247. select HAVE_MACH_CLKDEV
  248. select ICST
  249. select GENERIC_CLOCKEVENTS
  250. select ARCH_WANT_OPTIONAL_GPIOLIB
  251. select PLAT_VERSATILE
  252. select PLAT_VERSATILE_CLCD
  253. select PLAT_VERSATILE_FPGA_IRQ
  254. select ARM_TIMER_SP804
  255. help
  256. This enables support for ARM Ltd Versatile board.
  257. config ARCH_VEXPRESS
  258. bool "ARM Ltd. Versatile Express family"
  259. select ARCH_WANT_OPTIONAL_GPIOLIB
  260. select ARM_AMBA
  261. select ARM_TIMER_SP804
  262. select CLKDEV_LOOKUP
  263. select HAVE_MACH_CLKDEV
  264. select GENERIC_CLOCKEVENTS
  265. select HAVE_CLK
  266. select HAVE_PATA_PLATFORM
  267. select ICST
  268. select NO_IOPORT
  269. select PLAT_VERSATILE
  270. select PLAT_VERSATILE_CLCD
  271. help
  272. This enables support for the ARM Ltd Versatile Express boards.
  273. config ARCH_AT91
  274. bool "Atmel AT91"
  275. select ARCH_REQUIRE_GPIOLIB
  276. select HAVE_CLK
  277. select CLKDEV_LOOKUP
  278. select IRQ_DOMAIN
  279. select NEED_MACH_IO_H if PCCARD
  280. help
  281. This enables support for systems based on the Atmel AT91RM9200,
  282. AT91SAM9 processors.
  283. config ARCH_BCMRING
  284. bool "Broadcom BCMRING"
  285. depends on MMU
  286. select CPU_V6
  287. select ARM_AMBA
  288. select ARM_TIMER_SP804
  289. select CLKDEV_LOOKUP
  290. select GENERIC_CLOCKEVENTS
  291. select ARCH_WANT_OPTIONAL_GPIOLIB
  292. help
  293. Support for Broadcom's BCMRing platform.
  294. config ARCH_HIGHBANK
  295. bool "Calxeda Highbank-based"
  296. select ARCH_WANT_OPTIONAL_GPIOLIB
  297. select ARM_AMBA
  298. select ARM_GIC
  299. select ARM_TIMER_SP804
  300. select CACHE_L2X0
  301. select CLKDEV_LOOKUP
  302. select CPU_V7
  303. select GENERIC_CLOCKEVENTS
  304. select HAVE_ARM_SCU
  305. select HAVE_SMP
  306. select SPARSE_IRQ
  307. select USE_OF
  308. help
  309. Support for the Calxeda Highbank SoC based boards.
  310. config ARCH_CLPS711X
  311. bool "Cirrus Logic CLPS711x/EP721x-based"
  312. select CPU_ARM720T
  313. select ARCH_USES_GETTIMEOFFSET
  314. select NEED_MACH_MEMORY_H
  315. help
  316. Support for Cirrus Logic 711x/721x based boards.
  317. config ARCH_CNS3XXX
  318. bool "Cavium Networks CNS3XXX family"
  319. select CPU_V6K
  320. select GENERIC_CLOCKEVENTS
  321. select ARM_GIC
  322. select MIGHT_HAVE_CACHE_L2X0
  323. select MIGHT_HAVE_PCI
  324. select PCI_DOMAINS if PCI
  325. help
  326. Support for Cavium Networks CNS3XXX platform.
  327. config ARCH_GEMINI
  328. bool "Cortina Systems Gemini"
  329. select CPU_FA526
  330. select ARCH_REQUIRE_GPIOLIB
  331. select ARCH_USES_GETTIMEOFFSET
  332. help
  333. Support for the Cortina Systems Gemini family SoCs
  334. config ARCH_PRIMA2
  335. bool "CSR SiRFSoC PRIMA2 ARM Cortex A9 Platform"
  336. select CPU_V7
  337. select NO_IOPORT
  338. select GENERIC_CLOCKEVENTS
  339. select CLKDEV_LOOKUP
  340. select GENERIC_IRQ_CHIP
  341. select MIGHT_HAVE_CACHE_L2X0
  342. select USE_OF
  343. select ZONE_DMA
  344. help
  345. Support for CSR SiRFSoC ARM Cortex A9 Platform
  346. config ARCH_EBSA110
  347. bool "EBSA-110"
  348. select CPU_SA110
  349. select ISA
  350. select NO_IOPORT
  351. select ARCH_USES_GETTIMEOFFSET
  352. select NEED_MACH_IO_H
  353. select NEED_MACH_MEMORY_H
  354. help
  355. This is an evaluation board for the StrongARM processor available
  356. from Digital. It has limited hardware on-board, including an
  357. Ethernet interface, two PCMCIA sockets, two serial ports and a
  358. parallel port.
  359. config ARCH_EP93XX
  360. bool "EP93xx-based"
  361. select CPU_ARM920T
  362. select ARM_AMBA
  363. select ARM_VIC
  364. select CLKDEV_LOOKUP
  365. select ARCH_REQUIRE_GPIOLIB
  366. select ARCH_HAS_HOLES_MEMORYMODEL
  367. select ARCH_USES_GETTIMEOFFSET
  368. select NEED_MACH_MEMORY_H
  369. help
  370. This enables support for the Cirrus EP93xx series of CPUs.
  371. config ARCH_FOOTBRIDGE
  372. bool "FootBridge"
  373. select CPU_SA110
  374. select FOOTBRIDGE
  375. select GENERIC_CLOCKEVENTS
  376. select HAVE_IDE
  377. select NEED_MACH_IO_H
  378. select NEED_MACH_MEMORY_H
  379. help
  380. Support for systems based on the DC21285 companion chip
  381. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  382. config ARCH_MXC
  383. bool "Freescale MXC/iMX-based"
  384. select GENERIC_CLOCKEVENTS
  385. select ARCH_REQUIRE_GPIOLIB
  386. select CLKDEV_LOOKUP
  387. select CLKSRC_MMIO
  388. select GENERIC_IRQ_CHIP
  389. select MULTI_IRQ_HANDLER
  390. help
  391. Support for Freescale MXC/iMX-based family of processors
  392. config ARCH_MXS
  393. bool "Freescale MXS-based"
  394. select GENERIC_CLOCKEVENTS
  395. select ARCH_REQUIRE_GPIOLIB
  396. select CLKDEV_LOOKUP
  397. select CLKSRC_MMIO
  398. select HAVE_CLK_PREPARE
  399. help
  400. Support for Freescale MXS-based family of processors
  401. config ARCH_NETX
  402. bool "Hilscher NetX based"
  403. select CLKSRC_MMIO
  404. select CPU_ARM926T
  405. select ARM_VIC
  406. select GENERIC_CLOCKEVENTS
  407. help
  408. This enables support for systems based on the Hilscher NetX Soc
  409. config ARCH_H720X
  410. bool "Hynix HMS720x-based"
  411. select CPU_ARM720T
  412. select ISA_DMA_API
  413. select ARCH_USES_GETTIMEOFFSET
  414. help
  415. This enables support for systems based on the Hynix HMS720x
  416. config ARCH_IOP13XX
  417. bool "IOP13xx-based"
  418. depends on MMU
  419. select CPU_XSC3
  420. select PLAT_IOP
  421. select PCI
  422. select ARCH_SUPPORTS_MSI
  423. select VMSPLIT_1G
  424. select NEED_MACH_IO_H
  425. select NEED_MACH_MEMORY_H
  426. select NEED_RET_TO_USER
  427. help
  428. Support for Intel's IOP13XX (XScale) family of processors.
  429. config ARCH_IOP32X
  430. bool "IOP32x-based"
  431. depends on MMU
  432. select CPU_XSCALE
  433. select NEED_MACH_IO_H
  434. select NEED_RET_TO_USER
  435. select PLAT_IOP
  436. select PCI
  437. select ARCH_REQUIRE_GPIOLIB
  438. help
  439. Support for Intel's 80219 and IOP32X (XScale) family of
  440. processors.
  441. config ARCH_IOP33X
  442. bool "IOP33x-based"
  443. depends on MMU
  444. select CPU_XSCALE
  445. select NEED_MACH_IO_H
  446. select NEED_RET_TO_USER
  447. select PLAT_IOP
  448. select PCI
  449. select ARCH_REQUIRE_GPIOLIB
  450. help
  451. Support for Intel's IOP33X (XScale) family of processors.
  452. config ARCH_IXP23XX
  453. bool "IXP23XX-based"
  454. depends on MMU
  455. select CPU_XSC3
  456. select PCI
  457. select ARCH_USES_GETTIMEOFFSET
  458. select NEED_MACH_IO_H
  459. select NEED_MACH_MEMORY_H
  460. help
  461. Support for Intel's IXP23xx (XScale) family of processors.
  462. config ARCH_IXP2000
  463. bool "IXP2400/2800-based"
  464. depends on MMU
  465. select CPU_XSCALE
  466. select PCI
  467. select ARCH_USES_GETTIMEOFFSET
  468. select NEED_MACH_IO_H
  469. select NEED_MACH_MEMORY_H
  470. help
  471. Support for Intel's IXP2400/2800 (XScale) family of processors.
  472. config ARCH_IXP4XX
  473. bool "IXP4xx-based"
  474. depends on MMU
  475. select ARCH_HAS_DMA_SET_COHERENT_MASK
  476. select CLKSRC_MMIO
  477. select CPU_XSCALE
  478. select GENERIC_GPIO
  479. select GENERIC_CLOCKEVENTS
  480. select MIGHT_HAVE_PCI
  481. select NEED_MACH_IO_H
  482. select DMABOUNCE if PCI
  483. help
  484. Support for Intel's IXP4XX (XScale) family of processors.
  485. config ARCH_DOVE
  486. bool "Marvell Dove"
  487. select CPU_V7
  488. select PCI
  489. select ARCH_REQUIRE_GPIOLIB
  490. select GENERIC_CLOCKEVENTS
  491. select NEED_MACH_IO_H
  492. select PLAT_ORION
  493. help
  494. Support for the Marvell Dove SoC 88AP510
  495. config ARCH_KIRKWOOD
  496. bool "Marvell Kirkwood"
  497. select CPU_FEROCEON
  498. select PCI
  499. select ARCH_REQUIRE_GPIOLIB
  500. select GENERIC_CLOCKEVENTS
  501. select NEED_MACH_IO_H
  502. select PLAT_ORION
  503. help
  504. Support for the following Marvell Kirkwood series SoCs:
  505. 88F6180, 88F6192 and 88F6281.
  506. config ARCH_LPC32XX
  507. bool "NXP LPC32XX"
  508. select CLKSRC_MMIO
  509. select CPU_ARM926T
  510. select ARCH_REQUIRE_GPIOLIB
  511. select HAVE_IDE
  512. select ARM_AMBA
  513. select USB_ARCH_HAS_OHCI
  514. select CLKDEV_LOOKUP
  515. select GENERIC_CLOCKEVENTS
  516. help
  517. Support for the NXP LPC32XX family of processors
  518. config ARCH_MV78XX0
  519. bool "Marvell MV78xx0"
  520. select CPU_FEROCEON
  521. select PCI
  522. select ARCH_REQUIRE_GPIOLIB
  523. select GENERIC_CLOCKEVENTS
  524. select NEED_MACH_IO_H
  525. select PLAT_ORION
  526. help
  527. Support for the following Marvell MV78xx0 series SoCs:
  528. MV781x0, MV782x0.
  529. config ARCH_ORION5X
  530. bool "Marvell Orion"
  531. depends on MMU
  532. select CPU_FEROCEON
  533. select PCI
  534. select ARCH_REQUIRE_GPIOLIB
  535. select GENERIC_CLOCKEVENTS
  536. select PLAT_ORION
  537. help
  538. Support for the following Marvell Orion 5x series SoCs:
  539. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  540. Orion-2 (5281), Orion-1-90 (6183).
  541. config ARCH_MMP
  542. bool "Marvell PXA168/910/MMP2"
  543. depends on MMU
  544. select ARCH_REQUIRE_GPIOLIB
  545. select CLKDEV_LOOKUP
  546. select GENERIC_CLOCKEVENTS
  547. select GPIO_PXA
  548. select PLAT_PXA
  549. select SPARSE_IRQ
  550. select GENERIC_ALLOCATOR
  551. help
  552. Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
  553. config ARCH_KS8695
  554. bool "Micrel/Kendin KS8695"
  555. select CPU_ARM922T
  556. select ARCH_REQUIRE_GPIOLIB
  557. select ARCH_USES_GETTIMEOFFSET
  558. select NEED_MACH_MEMORY_H
  559. help
  560. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  561. System-on-Chip devices.
  562. config ARCH_W90X900
  563. bool "Nuvoton W90X900 CPU"
  564. select CPU_ARM926T
  565. select ARCH_REQUIRE_GPIOLIB
  566. select CLKDEV_LOOKUP
  567. select CLKSRC_MMIO
  568. select GENERIC_CLOCKEVENTS
  569. help
  570. Support for Nuvoton (Winbond logic dept.) ARM9 processor,
  571. At present, the w90x900 has been renamed nuc900, regarding
  572. the ARM series product line, you can login the following
  573. link address to know more.
  574. <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
  575. ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
  576. config ARCH_TEGRA
  577. bool "NVIDIA Tegra"
  578. select CLKDEV_LOOKUP
  579. select CLKSRC_MMIO
  580. select GENERIC_CLOCKEVENTS
  581. select GENERIC_GPIO
  582. select HAVE_CLK
  583. select HAVE_SMP
  584. select MIGHT_HAVE_CACHE_L2X0
  585. select NEED_MACH_IO_H if PCI
  586. select ARCH_HAS_CPUFREQ
  587. help
  588. This enables support for NVIDIA Tegra based systems (Tegra APX,
  589. Tegra 6xx and Tegra 2 series).
  590. config ARCH_PICOXCELL
  591. bool "Picochip picoXcell"
  592. select ARCH_REQUIRE_GPIOLIB
  593. select ARM_PATCH_PHYS_VIRT
  594. select ARM_VIC
  595. select CPU_V6K
  596. select DW_APB_TIMER
  597. select GENERIC_CLOCKEVENTS
  598. select GENERIC_GPIO
  599. select HAVE_TCM
  600. select NO_IOPORT
  601. select SPARSE_IRQ
  602. select USE_OF
  603. help
  604. This enables support for systems based on the Picochip picoXcell
  605. family of Femtocell devices. The picoxcell support requires device tree
  606. for all boards.
  607. config ARCH_PNX4008
  608. bool "Philips Nexperia PNX4008 Mobile"
  609. select CPU_ARM926T
  610. select CLKDEV_LOOKUP
  611. select ARCH_USES_GETTIMEOFFSET
  612. help
  613. This enables support for Philips PNX4008 mobile platform.
  614. config ARCH_PXA
  615. bool "PXA2xx/PXA3xx-based"
  616. depends on MMU
  617. select ARCH_MTD_XIP
  618. select ARCH_HAS_CPUFREQ
  619. select CLKDEV_LOOKUP
  620. select CLKSRC_MMIO
  621. select ARCH_REQUIRE_GPIOLIB
  622. select GENERIC_CLOCKEVENTS
  623. select GPIO_PXA
  624. select PLAT_PXA
  625. select SPARSE_IRQ
  626. select AUTO_ZRELADDR
  627. select MULTI_IRQ_HANDLER
  628. select ARM_CPU_SUSPEND if PM
  629. select HAVE_IDE
  630. help
  631. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  632. config ARCH_MSM
  633. bool "Qualcomm MSM"
  634. select HAVE_CLK
  635. select GENERIC_CLOCKEVENTS
  636. select ARCH_REQUIRE_GPIOLIB
  637. select CLKDEV_LOOKUP
  638. help
  639. Support for Qualcomm MSM/QSD based systems. This runs on the
  640. apps processor of the MSM/QSD and depends on a shared memory
  641. interface to the modem processor which runs the baseband
  642. stack and controls some vital subsystems
  643. (clock and power control, etc).
  644. config ARCH_SHMOBILE
  645. bool "Renesas SH-Mobile / R-Mobile"
  646. select HAVE_CLK
  647. select CLKDEV_LOOKUP
  648. select HAVE_MACH_CLKDEV
  649. select HAVE_SMP
  650. select GENERIC_CLOCKEVENTS
  651. select MIGHT_HAVE_CACHE_L2X0
  652. select NO_IOPORT
  653. select SPARSE_IRQ
  654. select MULTI_IRQ_HANDLER
  655. select PM_GENERIC_DOMAINS if PM
  656. select NEED_MACH_MEMORY_H
  657. help
  658. Support for Renesas's SH-Mobile and R-Mobile ARM platforms.
  659. config ARCH_RPC
  660. bool "RiscPC"
  661. select ARCH_ACORN
  662. select FIQ
  663. select ARCH_MAY_HAVE_PC_FDC
  664. select HAVE_PATA_PLATFORM
  665. select ISA_DMA_API
  666. select NO_IOPORT
  667. select ARCH_SPARSEMEM_ENABLE
  668. select ARCH_USES_GETTIMEOFFSET
  669. select HAVE_IDE
  670. select NEED_MACH_IO_H
  671. select NEED_MACH_MEMORY_H
  672. help
  673. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  674. CD-ROM interface, serial and parallel port, and the floppy drive.
  675. config ARCH_SA1100
  676. bool "SA1100-based"
  677. select CLKSRC_MMIO
  678. select CPU_SA1100
  679. select ISA
  680. select ARCH_SPARSEMEM_ENABLE
  681. select ARCH_MTD_XIP
  682. select ARCH_HAS_CPUFREQ
  683. select CPU_FREQ
  684. select GENERIC_CLOCKEVENTS
  685. select CLKDEV_LOOKUP
  686. select ARCH_REQUIRE_GPIOLIB
  687. select HAVE_IDE
  688. select NEED_MACH_MEMORY_H
  689. select SPARSE_IRQ
  690. help
  691. Support for StrongARM 11x0 based boards.
  692. config ARCH_S3C24XX
  693. bool "Samsung S3C24XX SoCs"
  694. select GENERIC_GPIO
  695. select ARCH_HAS_CPUFREQ
  696. select HAVE_CLK
  697. select CLKDEV_LOOKUP
  698. select ARCH_USES_GETTIMEOFFSET
  699. select HAVE_S3C2410_I2C if I2C
  700. select HAVE_S3C_RTC if RTC_CLASS
  701. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  702. select NEED_MACH_IO_H
  703. help
  704. Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443
  705. and S3C2450 SoCs based systems, such as the Simtec Electronics BAST
  706. (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or the
  707. Samsung SMDK2410 development board (and derivatives).
  708. config ARCH_S3C64XX
  709. bool "Samsung S3C64XX"
  710. select PLAT_SAMSUNG
  711. select CPU_V6
  712. select ARM_VIC
  713. select HAVE_CLK
  714. select HAVE_TCM
  715. select CLKDEV_LOOKUP
  716. select NO_IOPORT
  717. select ARCH_USES_GETTIMEOFFSET
  718. select ARCH_HAS_CPUFREQ
  719. select ARCH_REQUIRE_GPIOLIB
  720. select SAMSUNG_CLKSRC
  721. select SAMSUNG_IRQ_VIC_TIMER
  722. select S3C_GPIO_TRACK
  723. select S3C_DEV_NAND
  724. select USB_ARCH_HAS_OHCI
  725. select SAMSUNG_GPIOLIB_4BIT
  726. select HAVE_S3C2410_I2C if I2C
  727. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  728. help
  729. Samsung S3C64XX series based systems
  730. config ARCH_S5P64X0
  731. bool "Samsung S5P6440 S5P6450"
  732. select CPU_V6
  733. select GENERIC_GPIO
  734. select HAVE_CLK
  735. select CLKDEV_LOOKUP
  736. select CLKSRC_MMIO
  737. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  738. select GENERIC_CLOCKEVENTS
  739. select HAVE_S3C2410_I2C if I2C
  740. select HAVE_S3C_RTC if RTC_CLASS
  741. help
  742. Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
  743. SMDK6450.
  744. config ARCH_S5PC100
  745. bool "Samsung S5PC100"
  746. select GENERIC_GPIO
  747. select HAVE_CLK
  748. select CLKDEV_LOOKUP
  749. select CPU_V7
  750. select ARCH_USES_GETTIMEOFFSET
  751. select HAVE_S3C2410_I2C if I2C
  752. select HAVE_S3C_RTC if RTC_CLASS
  753. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  754. help
  755. Samsung S5PC100 series based systems
  756. config ARCH_S5PV210
  757. bool "Samsung S5PV210/S5PC110"
  758. select CPU_V7
  759. select ARCH_SPARSEMEM_ENABLE
  760. select ARCH_HAS_HOLES_MEMORYMODEL
  761. select GENERIC_GPIO
  762. select HAVE_CLK
  763. select CLKDEV_LOOKUP
  764. select CLKSRC_MMIO
  765. select ARCH_HAS_CPUFREQ
  766. select GENERIC_CLOCKEVENTS
  767. select HAVE_S3C2410_I2C if I2C
  768. select HAVE_S3C_RTC if RTC_CLASS
  769. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  770. select NEED_MACH_MEMORY_H
  771. help
  772. Samsung S5PV210/S5PC110 series based systems
  773. config ARCH_EXYNOS
  774. bool "SAMSUNG EXYNOS"
  775. select CPU_V7
  776. select ARCH_SPARSEMEM_ENABLE
  777. select ARCH_HAS_HOLES_MEMORYMODEL
  778. select GENERIC_GPIO
  779. select HAVE_CLK
  780. select CLKDEV_LOOKUP
  781. select ARCH_HAS_CPUFREQ
  782. select GENERIC_CLOCKEVENTS
  783. select HAVE_S3C_RTC if RTC_CLASS
  784. select HAVE_S3C2410_I2C if I2C
  785. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  786. select NEED_MACH_MEMORY_H
  787. help
  788. Support for SAMSUNG's EXYNOS SoCs (EXYNOS4/5)
  789. config ARCH_SHARK
  790. bool "Shark"
  791. select CPU_SA110
  792. select ISA
  793. select ISA_DMA
  794. select ZONE_DMA
  795. select PCI
  796. select ARCH_USES_GETTIMEOFFSET
  797. select NEED_MACH_MEMORY_H
  798. select NEED_MACH_IO_H
  799. help
  800. Support for the StrongARM based Digital DNARD machine, also known
  801. as "Shark" (<http://www.shark-linux.de/shark.html>).
  802. config ARCH_U300
  803. bool "ST-Ericsson U300 Series"
  804. depends on MMU
  805. select CLKSRC_MMIO
  806. select CPU_ARM926T
  807. select HAVE_TCM
  808. select ARM_AMBA
  809. select ARM_PATCH_PHYS_VIRT
  810. select ARM_VIC
  811. select GENERIC_CLOCKEVENTS
  812. select CLKDEV_LOOKUP
  813. select HAVE_MACH_CLKDEV
  814. select GENERIC_GPIO
  815. select ARCH_REQUIRE_GPIOLIB
  816. help
  817. Support for ST-Ericsson U300 series mobile platforms.
  818. config ARCH_U8500
  819. bool "ST-Ericsson U8500 Series"
  820. depends on MMU
  821. select CPU_V7
  822. select ARM_AMBA
  823. select GENERIC_CLOCKEVENTS
  824. select CLKDEV_LOOKUP
  825. select ARCH_REQUIRE_GPIOLIB
  826. select ARCH_HAS_CPUFREQ
  827. select HAVE_SMP
  828. select MIGHT_HAVE_CACHE_L2X0
  829. help
  830. Support for ST-Ericsson's Ux500 architecture
  831. config ARCH_NOMADIK
  832. bool "STMicroelectronics Nomadik"
  833. select ARM_AMBA
  834. select ARM_VIC
  835. select CPU_ARM926T
  836. select CLKDEV_LOOKUP
  837. select GENERIC_CLOCKEVENTS
  838. select MIGHT_HAVE_CACHE_L2X0
  839. select ARCH_REQUIRE_GPIOLIB
  840. help
  841. Support for the Nomadik platform by ST-Ericsson
  842. config ARCH_DAVINCI
  843. bool "TI DaVinci"
  844. select GENERIC_CLOCKEVENTS
  845. select ARCH_REQUIRE_GPIOLIB
  846. select ZONE_DMA
  847. select HAVE_IDE
  848. select CLKDEV_LOOKUP
  849. select GENERIC_ALLOCATOR
  850. select GENERIC_IRQ_CHIP
  851. select ARCH_HAS_HOLES_MEMORYMODEL
  852. help
  853. Support for TI's DaVinci platform.
  854. config ARCH_OMAP
  855. bool "TI OMAP"
  856. select HAVE_CLK
  857. select ARCH_REQUIRE_GPIOLIB
  858. select ARCH_HAS_CPUFREQ
  859. select CLKSRC_MMIO
  860. select GENERIC_CLOCKEVENTS
  861. select ARCH_HAS_HOLES_MEMORYMODEL
  862. help
  863. Support for TI's OMAP platform (OMAP1/2/3/4).
  864. config PLAT_SPEAR
  865. bool "ST SPEAr"
  866. select ARM_AMBA
  867. select ARCH_REQUIRE_GPIOLIB
  868. select CLKDEV_LOOKUP
  869. select CLKSRC_MMIO
  870. select GENERIC_CLOCKEVENTS
  871. select HAVE_CLK
  872. help
  873. Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
  874. config ARCH_VT8500
  875. bool "VIA/WonderMedia 85xx"
  876. select CPU_ARM926T
  877. select GENERIC_GPIO
  878. select ARCH_HAS_CPUFREQ
  879. select GENERIC_CLOCKEVENTS
  880. select ARCH_REQUIRE_GPIOLIB
  881. select HAVE_PWM
  882. help
  883. Support for VIA/WonderMedia VT8500/WM85xx System-on-Chip.
  884. config ARCH_ZYNQ
  885. bool "Xilinx Zynq ARM Cortex A9 Platform"
  886. select CPU_V7
  887. select GENERIC_CLOCKEVENTS
  888. select CLKDEV_LOOKUP
  889. select ARM_GIC
  890. select ARM_AMBA
  891. select ICST
  892. select MIGHT_HAVE_CACHE_L2X0
  893. select USE_OF
  894. help
  895. Support for Xilinx Zynq ARM Cortex A9 Platform
  896. endchoice
  897. #
  898. # This is sorted alphabetically by mach-* pathname. However, plat-*
  899. # Kconfigs may be included either alphabetically (according to the
  900. # plat- suffix) or along side the corresponding mach-* source.
  901. #
  902. source "arch/arm/mach-at91/Kconfig"
  903. source "arch/arm/mach-bcmring/Kconfig"
  904. source "arch/arm/mach-clps711x/Kconfig"
  905. source "arch/arm/mach-cns3xxx/Kconfig"
  906. source "arch/arm/mach-davinci/Kconfig"
  907. source "arch/arm/mach-dove/Kconfig"
  908. source "arch/arm/mach-ep93xx/Kconfig"
  909. source "arch/arm/mach-footbridge/Kconfig"
  910. source "arch/arm/mach-gemini/Kconfig"
  911. source "arch/arm/mach-h720x/Kconfig"
  912. source "arch/arm/mach-integrator/Kconfig"
  913. source "arch/arm/mach-iop32x/Kconfig"
  914. source "arch/arm/mach-iop33x/Kconfig"
  915. source "arch/arm/mach-iop13xx/Kconfig"
  916. source "arch/arm/mach-ixp4xx/Kconfig"
  917. source "arch/arm/mach-ixp2000/Kconfig"
  918. source "arch/arm/mach-ixp23xx/Kconfig"
  919. source "arch/arm/mach-kirkwood/Kconfig"
  920. source "arch/arm/mach-ks8695/Kconfig"
  921. source "arch/arm/mach-lpc32xx/Kconfig"
  922. source "arch/arm/mach-msm/Kconfig"
  923. source "arch/arm/mach-mv78xx0/Kconfig"
  924. source "arch/arm/plat-mxc/Kconfig"
  925. source "arch/arm/mach-mxs/Kconfig"
  926. source "arch/arm/mach-netx/Kconfig"
  927. source "arch/arm/mach-nomadik/Kconfig"
  928. source "arch/arm/plat-nomadik/Kconfig"
  929. source "arch/arm/plat-omap/Kconfig"
  930. source "arch/arm/mach-omap1/Kconfig"
  931. source "arch/arm/mach-omap2/Kconfig"
  932. source "arch/arm/mach-orion5x/Kconfig"
  933. source "arch/arm/mach-pxa/Kconfig"
  934. source "arch/arm/plat-pxa/Kconfig"
  935. source "arch/arm/mach-mmp/Kconfig"
  936. source "arch/arm/mach-realview/Kconfig"
  937. source "arch/arm/mach-sa1100/Kconfig"
  938. source "arch/arm/plat-samsung/Kconfig"
  939. source "arch/arm/plat-s3c24xx/Kconfig"
  940. source "arch/arm/plat-s5p/Kconfig"
  941. source "arch/arm/plat-spear/Kconfig"
  942. source "arch/arm/mach-s3c24xx/Kconfig"
  943. if ARCH_S3C24XX
  944. source "arch/arm/mach-s3c2412/Kconfig"
  945. source "arch/arm/mach-s3c2440/Kconfig"
  946. endif
  947. if ARCH_S3C64XX
  948. source "arch/arm/mach-s3c64xx/Kconfig"
  949. endif
  950. source "arch/arm/mach-s5p64x0/Kconfig"
  951. source "arch/arm/mach-s5pc100/Kconfig"
  952. source "arch/arm/mach-s5pv210/Kconfig"
  953. source "arch/arm/mach-exynos/Kconfig"
  954. source "arch/arm/mach-shmobile/Kconfig"
  955. source "arch/arm/mach-tegra/Kconfig"
  956. source "arch/arm/mach-u300/Kconfig"
  957. source "arch/arm/mach-ux500/Kconfig"
  958. source "arch/arm/mach-versatile/Kconfig"
  959. source "arch/arm/mach-vexpress/Kconfig"
  960. source "arch/arm/plat-versatile/Kconfig"
  961. source "arch/arm/mach-vt8500/Kconfig"
  962. source "arch/arm/mach-w90x900/Kconfig"
  963. # Definitions to make life easier
  964. config ARCH_ACORN
  965. bool
  966. config PLAT_IOP
  967. bool
  968. select GENERIC_CLOCKEVENTS
  969. config PLAT_ORION
  970. bool
  971. select CLKSRC_MMIO
  972. select GENERIC_IRQ_CHIP
  973. config PLAT_PXA
  974. bool
  975. config PLAT_VERSATILE
  976. bool
  977. config ARM_TIMER_SP804
  978. bool
  979. select CLKSRC_MMIO
  980. select HAVE_SCHED_CLOCK
  981. source arch/arm/mm/Kconfig
  982. config ARM_NR_BANKS
  983. int
  984. default 16 if ARCH_EP93XX
  985. default 8
  986. config IWMMXT
  987. bool "Enable iWMMXt support"
  988. depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
  989. default y if PXA27x || PXA3xx || PXA95x || ARCH_MMP
  990. help
  991. Enable support for iWMMXt context switching at run time if
  992. running on a CPU that supports it.
  993. config XSCALE_PMU
  994. bool
  995. depends on CPU_XSCALE
  996. default y
  997. config CPU_HAS_PMU
  998. depends on (CPU_V6 || CPU_V6K || CPU_V7 || XSCALE_PMU) && \
  999. (!ARCH_OMAP3 || OMAP3_EMU)
  1000. default y
  1001. bool
  1002. config MULTI_IRQ_HANDLER
  1003. bool
  1004. help
  1005. Allow each machine to specify it's own IRQ handler at run time.
  1006. if !MMU
  1007. source "arch/arm/Kconfig-nommu"
  1008. endif
  1009. config ARM_ERRATA_411920
  1010. bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
  1011. depends on CPU_V6 || CPU_V6K
  1012. help
  1013. Invalidation of the Instruction Cache operation can
  1014. fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
  1015. It does not affect the MPCore. This option enables the ARM Ltd.
  1016. recommended workaround.
  1017. config ARM_ERRATA_430973
  1018. bool "ARM errata: Stale prediction on replaced interworking branch"
  1019. depends on CPU_V7
  1020. help
  1021. This option enables the workaround for the 430973 Cortex-A8
  1022. (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
  1023. interworking branch is replaced with another code sequence at the
  1024. same virtual address, whether due to self-modifying code or virtual
  1025. to physical address re-mapping, Cortex-A8 does not recover from the
  1026. stale interworking branch prediction. This results in Cortex-A8
  1027. executing the new code sequence in the incorrect ARM or Thumb state.
  1028. The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
  1029. and also flushes the branch target cache at every context switch.
  1030. Note that setting specific bits in the ACTLR register may not be
  1031. available in non-secure mode.
  1032. config ARM_ERRATA_458693
  1033. bool "ARM errata: Processor deadlock when a false hazard is created"
  1034. depends on CPU_V7
  1035. help
  1036. This option enables the workaround for the 458693 Cortex-A8 (r2p0)
  1037. erratum. For very specific sequences of memory operations, it is
  1038. possible for a hazard condition intended for a cache line to instead
  1039. be incorrectly associated with a different cache line. This false
  1040. hazard might then cause a processor deadlock. The workaround enables
  1041. the L1 caching of the NEON accesses and disables the PLD instruction
  1042. in the ACTLR register. Note that setting specific bits in the ACTLR
  1043. register may not be available in non-secure mode.
  1044. config ARM_ERRATA_460075
  1045. bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
  1046. depends on CPU_V7
  1047. help
  1048. This option enables the workaround for the 460075 Cortex-A8 (r2p0)
  1049. erratum. Any asynchronous access to the L2 cache may encounter a
  1050. situation in which recent store transactions to the L2 cache are lost
  1051. and overwritten with stale memory contents from external memory. The
  1052. workaround disables the write-allocate mode for the L2 cache via the
  1053. ACTLR register. Note that setting specific bits in the ACTLR register
  1054. may not be available in non-secure mode.
  1055. config ARM_ERRATA_742230
  1056. bool "ARM errata: DMB operation may be faulty"
  1057. depends on CPU_V7 && SMP
  1058. help
  1059. This option enables the workaround for the 742230 Cortex-A9
  1060. (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
  1061. between two write operations may not ensure the correct visibility
  1062. ordering of the two writes. This workaround sets a specific bit in
  1063. the diagnostic register of the Cortex-A9 which causes the DMB
  1064. instruction to behave as a DSB, ensuring the correct behaviour of
  1065. the two writes.
  1066. config ARM_ERRATA_742231
  1067. bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
  1068. depends on CPU_V7 && SMP
  1069. help
  1070. This option enables the workaround for the 742231 Cortex-A9
  1071. (r2p0..r2p2) erratum. Under certain conditions, specific to the
  1072. Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
  1073. accessing some data located in the same cache line, may get corrupted
  1074. data due to bad handling of the address hazard when the line gets
  1075. replaced from one of the CPUs at the same time as another CPU is
  1076. accessing it. This workaround sets specific bits in the diagnostic
  1077. register of the Cortex-A9 which reduces the linefill issuing
  1078. capabilities of the processor.
  1079. config PL310_ERRATA_588369
  1080. bool "PL310 errata: Clean & Invalidate maintenance operations do not invalidate clean lines"
  1081. depends on CACHE_L2X0
  1082. help
  1083. The PL310 L2 cache controller implements three types of Clean &
  1084. Invalidate maintenance operations: by Physical Address
  1085. (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
  1086. They are architecturally defined to behave as the execution of a
  1087. clean operation followed immediately by an invalidate operation,
  1088. both performing to the same memory location. This functionality
  1089. is not correctly implemented in PL310 as clean lines are not
  1090. invalidated as a result of these operations.
  1091. config ARM_ERRATA_720789
  1092. bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
  1093. depends on CPU_V7
  1094. help
  1095. This option enables the workaround for the 720789 Cortex-A9 (prior to
  1096. r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
  1097. broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
  1098. As a consequence of this erratum, some TLB entries which should be
  1099. invalidated are not, resulting in an incoherency in the system page
  1100. tables. The workaround changes the TLB flushing routines to invalidate
  1101. entries regardless of the ASID.
  1102. config PL310_ERRATA_727915
  1103. bool "PL310 errata: Background Clean & Invalidate by Way operation can cause data corruption"
  1104. depends on CACHE_L2X0
  1105. help
  1106. PL310 implements the Clean & Invalidate by Way L2 cache maintenance
  1107. operation (offset 0x7FC). This operation runs in background so that
  1108. PL310 can handle normal accesses while it is in progress. Under very
  1109. rare circumstances, due to this erratum, write data can be lost when
  1110. PL310 treats a cacheable write transaction during a Clean &
  1111. Invalidate by Way operation.
  1112. config ARM_ERRATA_743622
  1113. bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
  1114. depends on CPU_V7
  1115. help
  1116. This option enables the workaround for the 743622 Cortex-A9
  1117. (r2p*) erratum. Under very rare conditions, a faulty
  1118. optimisation in the Cortex-A9 Store Buffer may lead to data
  1119. corruption. This workaround sets a specific bit in the diagnostic
  1120. register of the Cortex-A9 which disables the Store Buffer
  1121. optimisation, preventing the defect from occurring. This has no
  1122. visible impact on the overall performance or power consumption of the
  1123. processor.
  1124. config ARM_ERRATA_751472
  1125. bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
  1126. depends on CPU_V7
  1127. help
  1128. This option enables the workaround for the 751472 Cortex-A9 (prior
  1129. to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
  1130. completion of a following broadcasted operation if the second
  1131. operation is received by a CPU before the ICIALLUIS has completed,
  1132. potentially leading to corrupted entries in the cache or TLB.
  1133. config PL310_ERRATA_753970
  1134. bool "PL310 errata: cache sync operation may be faulty"
  1135. depends on CACHE_PL310
  1136. help
  1137. This option enables the workaround for the 753970 PL310 (r3p0) erratum.
  1138. Under some condition the effect of cache sync operation on
  1139. the store buffer still remains when the operation completes.
  1140. This means that the store buffer is always asked to drain and
  1141. this prevents it from merging any further writes. The workaround
  1142. is to replace the normal offset of cache sync operation (0x730)
  1143. by another offset targeting an unmapped PL310 register 0x740.
  1144. This has the same effect as the cache sync operation: store buffer
  1145. drain and waiting for all buffers empty.
  1146. config ARM_ERRATA_754322
  1147. bool "ARM errata: possible faulty MMU translations following an ASID switch"
  1148. depends on CPU_V7
  1149. help
  1150. This option enables the workaround for the 754322 Cortex-A9 (r2p*,
  1151. r3p*) erratum. A speculative memory access may cause a page table walk
  1152. which starts prior to an ASID switch but completes afterwards. This
  1153. can populate the micro-TLB with a stale entry which may be hit with
  1154. the new ASID. This workaround places two dsb instructions in the mm
  1155. switching code so that no page table walks can cross the ASID switch.
  1156. config ARM_ERRATA_754327
  1157. bool "ARM errata: no automatic Store Buffer drain"
  1158. depends on CPU_V7 && SMP
  1159. help
  1160. This option enables the workaround for the 754327 Cortex-A9 (prior to
  1161. r2p0) erratum. The Store Buffer does not have any automatic draining
  1162. mechanism and therefore a livelock may occur if an external agent
  1163. continuously polls a memory location waiting to observe an update.
  1164. This workaround defines cpu_relax() as smp_mb(), preventing correctly
  1165. written polling loops from denying visibility of updates to memory.
  1166. config ARM_ERRATA_364296
  1167. bool "ARM errata: Possible cache data corruption with hit-under-miss enabled"
  1168. depends on CPU_V6 && !SMP
  1169. help
  1170. This options enables the workaround for the 364296 ARM1136
  1171. r0p2 erratum (possible cache data corruption with
  1172. hit-under-miss enabled). It sets the undocumented bit 31 in
  1173. the auxiliary control register and the FI bit in the control
  1174. register, thus disabling hit-under-miss without putting the
  1175. processor into full low interrupt latency mode. ARM11MPCore
  1176. is not affected.
  1177. config ARM_ERRATA_764369
  1178. bool "ARM errata: Data cache line maintenance operation by MVA may not succeed"
  1179. depends on CPU_V7 && SMP
  1180. help
  1181. This option enables the workaround for erratum 764369
  1182. affecting Cortex-A9 MPCore with two or more processors (all
  1183. current revisions). Under certain timing circumstances, a data
  1184. cache line maintenance operation by MVA targeting an Inner
  1185. Shareable memory region may fail to proceed up to either the
  1186. Point of Coherency or to the Point of Unification of the
  1187. system. This workaround adds a DSB instruction before the
  1188. relevant cache maintenance functions and sets a specific bit
  1189. in the diagnostic control register of the SCU.
  1190. config PL310_ERRATA_769419
  1191. bool "PL310 errata: no automatic Store Buffer drain"
  1192. depends on CACHE_L2X0
  1193. help
  1194. On revisions of the PL310 prior to r3p2, the Store Buffer does
  1195. not automatically drain. This can cause normal, non-cacheable
  1196. writes to be retained when the memory system is idle, leading
  1197. to suboptimal I/O performance for drivers using coherent DMA.
  1198. This option adds a write barrier to the cpu_idle loop so that,
  1199. on systems with an outer cache, the store buffer is drained
  1200. explicitly.
  1201. endmenu
  1202. source "arch/arm/common/Kconfig"
  1203. menu "Bus support"
  1204. config ARM_AMBA
  1205. bool
  1206. config ISA
  1207. bool
  1208. help
  1209. Find out whether you have ISA slots on your motherboard. ISA is the
  1210. name of a bus system, i.e. the way the CPU talks to the other stuff
  1211. inside your box. Other bus systems are PCI, EISA, MicroChannel
  1212. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  1213. newer boards don't support it. If you have ISA, say Y, otherwise N.
  1214. # Select ISA DMA controller support
  1215. config ISA_DMA
  1216. bool
  1217. select ISA_DMA_API
  1218. # Select ISA DMA interface
  1219. config ISA_DMA_API
  1220. bool
  1221. config PCI
  1222. bool "PCI support" if MIGHT_HAVE_PCI
  1223. help
  1224. Find out whether you have a PCI motherboard. PCI is the name of a
  1225. bus system, i.e. the way the CPU talks to the other stuff inside
  1226. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  1227. VESA. If you have PCI, say Y, otherwise N.
  1228. config PCI_DOMAINS
  1229. bool
  1230. depends on PCI
  1231. config PCI_NANOENGINE
  1232. bool "BSE nanoEngine PCI support"
  1233. depends on SA1100_NANOENGINE
  1234. help
  1235. Enable PCI on the BSE nanoEngine board.
  1236. config PCI_SYSCALL
  1237. def_bool PCI
  1238. # Select the host bridge type
  1239. config PCI_HOST_VIA82C505
  1240. bool
  1241. depends on PCI && ARCH_SHARK
  1242. default y
  1243. config PCI_HOST_ITE8152
  1244. bool
  1245. depends on PCI && MACH_ARMCORE
  1246. default y
  1247. select DMABOUNCE
  1248. source "drivers/pci/Kconfig"
  1249. source "drivers/pcmcia/Kconfig"
  1250. endmenu
  1251. menu "Kernel Features"
  1252. source "kernel/time/Kconfig"
  1253. config HAVE_SMP
  1254. bool
  1255. help
  1256. This option should be selected by machines which have an SMP-
  1257. capable CPU.
  1258. The only effect of this option is to make the SMP-related
  1259. options available to the user for configuration.
  1260. config SMP
  1261. bool "Symmetric Multi-Processing"
  1262. depends on CPU_V6K || CPU_V7
  1263. depends on GENERIC_CLOCKEVENTS
  1264. depends on HAVE_SMP
  1265. depends on MMU
  1266. select USE_GENERIC_SMP_HELPERS
  1267. select HAVE_ARM_SCU if !ARCH_MSM_SCORPIONMP
  1268. help
  1269. This enables support for systems with more than one CPU. If you have
  1270. a system with only one CPU, like most personal computers, say N. If
  1271. you have a system with more than one CPU, say Y.
  1272. If you say N here, the kernel will run on single and multiprocessor
  1273. machines, but will use only one CPU of a multiprocessor machine. If
  1274. you say Y here, the kernel will run on many, but not all, single
  1275. processor machines. On a single processor machine, the kernel will
  1276. run faster if you say N here.
  1277. See also <file:Documentation/x86/i386/IO-APIC.txt>,
  1278. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  1279. <http://tldp.org/HOWTO/SMP-HOWTO.html>.
  1280. If you don't know what to do here, say N.
  1281. config SMP_ON_UP
  1282. bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
  1283. depends on EXPERIMENTAL
  1284. depends on SMP && !XIP_KERNEL
  1285. default y
  1286. help
  1287. SMP kernels contain instructions which fail on non-SMP processors.
  1288. Enabling this option allows the kernel to modify itself to make
  1289. these instructions safe. Disabling it allows about 1K of space
  1290. savings.
  1291. If you don't know what to do here, say Y.
  1292. config ARM_CPU_TOPOLOGY
  1293. bool "Support cpu topology definition"
  1294. depends on SMP && CPU_V7
  1295. default y
  1296. help
  1297. Support ARM cpu topology definition. The MPIDR register defines
  1298. affinity between processors which is then used to describe the cpu
  1299. topology of an ARM System.
  1300. config SCHED_MC
  1301. bool "Multi-core scheduler support"
  1302. depends on ARM_CPU_TOPOLOGY
  1303. help
  1304. Multi-core scheduler support improves the CPU scheduler's decision
  1305. making when dealing with multi-core CPU chips at a cost of slightly
  1306. increased overhead in some places. If unsure say N here.
  1307. config SCHED_SMT
  1308. bool "SMT scheduler support"
  1309. depends on ARM_CPU_TOPOLOGY
  1310. help
  1311. Improves the CPU scheduler's decision making when dealing with
  1312. MultiThreading at a cost of slightly increased overhead in some
  1313. places. If unsure say N here.
  1314. config HAVE_ARM_SCU
  1315. bool
  1316. help
  1317. This option enables support for the ARM system coherency unit
  1318. config HAVE_ARM_TWD
  1319. bool
  1320. depends on SMP
  1321. help
  1322. This options enables support for the ARM timer and watchdog unit
  1323. choice
  1324. prompt "Memory split"
  1325. default VMSPLIT_3G
  1326. help
  1327. Select the desired split between kernel and user memory.
  1328. If you are not absolutely sure what you are doing, leave this
  1329. option alone!
  1330. config VMSPLIT_3G
  1331. bool "3G/1G user/kernel split"
  1332. config VMSPLIT_2G
  1333. bool "2G/2G user/kernel split"
  1334. config VMSPLIT_1G
  1335. bool "1G/3G user/kernel split"
  1336. endchoice
  1337. config PAGE_OFFSET
  1338. hex
  1339. default 0x40000000 if VMSPLIT_1G
  1340. default 0x80000000 if VMSPLIT_2G
  1341. default 0xC0000000
  1342. config NR_CPUS
  1343. int "Maximum number of CPUs (2-32)"
  1344. range 2 32
  1345. depends on SMP
  1346. default "4"
  1347. config HOTPLUG_CPU
  1348. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  1349. depends on SMP && HOTPLUG && EXPERIMENTAL
  1350. help
  1351. Say Y here to experiment with turning CPUs off and on. CPUs
  1352. can be controlled through /sys/devices/system/cpu.
  1353. config LOCAL_TIMERS
  1354. bool "Use local timer interrupts"
  1355. depends on SMP
  1356. default y
  1357. select HAVE_ARM_TWD if (!ARCH_MSM_SCORPIONMP && !EXYNOS4_MCT)
  1358. help
  1359. Enable support for local timers on SMP platforms, rather then the
  1360. legacy IPI broadcast method. Local timers allows the system
  1361. accounting to be spread across the timer interval, preventing a
  1362. "thundering herd" at every timer tick.
  1363. config ARCH_NR_GPIO
  1364. int
  1365. default 1024 if ARCH_SHMOBILE || ARCH_TEGRA
  1366. default 355 if ARCH_U8500
  1367. default 264 if MACH_H4700
  1368. default 0
  1369. help
  1370. Maximum number of GPIOs in the system.
  1371. If unsure, leave the default value.
  1372. source kernel/Kconfig.preempt
  1373. config HZ
  1374. int
  1375. default 200 if ARCH_EBSA110 || ARCH_S3C24XX || ARCH_S5P64X0 || \
  1376. ARCH_S5PV210 || ARCH_EXYNOS4
  1377. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  1378. default AT91_TIMER_HZ if ARCH_AT91
  1379. default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
  1380. default 100
  1381. config THUMB2_KERNEL
  1382. bool "Compile the kernel in Thumb-2 mode (EXPERIMENTAL)"
  1383. depends on CPU_V7 && !CPU_V6 && !CPU_V6K && EXPERIMENTAL
  1384. select AEABI
  1385. select ARM_ASM_UNIFIED
  1386. select ARM_UNWIND
  1387. help
  1388. By enabling this option, the kernel will be compiled in
  1389. Thumb-2 mode. A compiler/assembler that understand the unified
  1390. ARM-Thumb syntax is needed.
  1391. If unsure, say N.
  1392. config THUMB2_AVOID_R_ARM_THM_JUMP11
  1393. bool "Work around buggy Thumb-2 short branch relocations in gas"
  1394. depends on THUMB2_KERNEL && MODULES
  1395. default y
  1396. help
  1397. Various binutils versions can resolve Thumb-2 branches to
  1398. locally-defined, preemptible global symbols as short-range "b.n"
  1399. branch instructions.
  1400. This is a problem, because there's no guarantee the final
  1401. destination of the symbol, or any candidate locations for a
  1402. trampoline, are within range of the branch. For this reason, the
  1403. kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
  1404. relocation in modules at all, and it makes little sense to add
  1405. support.
  1406. The symptom is that the kernel fails with an "unsupported
  1407. relocation" error when loading some modules.
  1408. Until fixed tools are available, passing
  1409. -fno-optimize-sibling-calls to gcc should prevent gcc generating
  1410. code which hits this problem, at the cost of a bit of extra runtime
  1411. stack usage in some cases.
  1412. The problem is described in more detail at:
  1413. https://bugs.launchpad.net/binutils-linaro/+bug/725126
  1414. Only Thumb-2 kernels are affected.
  1415. Unless you are sure your tools don't have this problem, say Y.
  1416. config ARM_ASM_UNIFIED
  1417. bool
  1418. config AEABI
  1419. bool "Use the ARM EABI to compile the kernel"
  1420. help
  1421. This option allows for the kernel to be compiled using the latest
  1422. ARM ABI (aka EABI). This is only useful if you are using a user
  1423. space environment that is also compiled with EABI.
  1424. Since there are major incompatibilities between the legacy ABI and
  1425. EABI, especially with regard to structure member alignment, this
  1426. option also changes the kernel syscall calling convention to
  1427. disambiguate both ABIs and allow for backward compatibility support
  1428. (selected with CONFIG_OABI_COMPAT).
  1429. To use this you need GCC version 4.0.0 or later.
  1430. config OABI_COMPAT
  1431. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  1432. depends on AEABI && EXPERIMENTAL && !THUMB2_KERNEL
  1433. default y
  1434. help
  1435. This option preserves the old syscall interface along with the
  1436. new (ARM EABI) one. It also provides a compatibility layer to
  1437. intercept syscalls that have structure arguments which layout
  1438. in memory differs between the legacy ABI and the new ARM EABI
  1439. (only for non "thumb" binaries). This option adds a tiny
  1440. overhead to all syscalls and produces a slightly larger kernel.
  1441. If you know you'll be using only pure EABI user space then you
  1442. can say N here. If this option is not selected and you attempt
  1443. to execute a legacy ABI binary then the result will be
  1444. UNPREDICTABLE (in fact it can be predicted that it won't work
  1445. at all). If in doubt say Y.
  1446. config ARCH_HAS_HOLES_MEMORYMODEL
  1447. bool
  1448. config ARCH_SPARSEMEM_ENABLE
  1449. bool
  1450. config ARCH_SPARSEMEM_DEFAULT
  1451. def_bool ARCH_SPARSEMEM_ENABLE
  1452. config ARCH_SELECT_MEMORY_MODEL
  1453. def_bool ARCH_SPARSEMEM_ENABLE
  1454. config HAVE_ARCH_PFN_VALID
  1455. def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
  1456. config HIGHMEM
  1457. bool "High Memory Support"
  1458. depends on MMU
  1459. help
  1460. The address space of ARM processors is only 4 Gigabytes large
  1461. and it has to accommodate user address space, kernel address
  1462. space as well as some memory mapped IO. That means that, if you
  1463. have a large amount of physical memory and/or IO, not all of the
  1464. memory can be "permanently mapped" by the kernel. The physical
  1465. memory that is not permanently mapped is called "high memory".
  1466. Depending on the selected kernel/user memory split, minimum
  1467. vmalloc space and actual amount of RAM, you may not need this
  1468. option which should result in a slightly faster kernel.
  1469. If unsure, say n.
  1470. config HIGHPTE
  1471. bool "Allocate 2nd-level pagetables from highmem"
  1472. depends on HIGHMEM
  1473. config HW_PERF_EVENTS
  1474. bool "Enable hardware performance counter support for perf events"
  1475. depends on PERF_EVENTS && CPU_HAS_PMU
  1476. default y
  1477. help
  1478. Enable hardware performance counter support for perf events. If
  1479. disabled, perf events will use software events only.
  1480. source "mm/Kconfig"
  1481. config FORCE_MAX_ZONEORDER
  1482. int "Maximum zone order" if ARCH_SHMOBILE
  1483. range 11 64 if ARCH_SHMOBILE
  1484. default "9" if SA1111
  1485. default "11"
  1486. help
  1487. The kernel memory allocator divides physically contiguous memory
  1488. blocks into "zones", where each zone is a power of two number of
  1489. pages. This option selects the largest power of two that the kernel
  1490. keeps in the memory allocator. If you need to allocate very large
  1491. blocks of physically contiguous memory, then you may need to
  1492. increase this value.
  1493. This config option is actually maximum order plus one. For example,
  1494. a value of 11 means that the largest free memory block is 2^10 pages.
  1495. config LEDS
  1496. bool "Timer and CPU usage LEDs"
  1497. depends on ARCH_CDB89712 || ARCH_EBSA110 || \
  1498. ARCH_EBSA285 || ARCH_INTEGRATOR || \
  1499. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  1500. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  1501. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  1502. ARCH_AT91 || ARCH_DAVINCI || \
  1503. ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
  1504. help
  1505. If you say Y here, the LEDs on your machine will be used
  1506. to provide useful information about your current system status.
  1507. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  1508. be able to select which LEDs are active using the options below. If
  1509. you are compiling a kernel for the EBSA-110 or the LART however, the
  1510. red LED will simply flash regularly to indicate that the system is
  1511. still functional. It is safe to say Y here if you have a CATS
  1512. system, but the driver will do nothing.
  1513. config LEDS_TIMER
  1514. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  1515. OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1516. || MACH_OMAP_PERSEUS2
  1517. depends on LEDS
  1518. depends on !GENERIC_CLOCKEVENTS
  1519. default y if ARCH_EBSA110
  1520. help
  1521. If you say Y here, one of the system LEDs (the green one on the
  1522. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  1523. will flash regularly to indicate that the system is still
  1524. operational. This is mainly useful to kernel hackers who are
  1525. debugging unstable kernels.
  1526. The LART uses the same LED for both Timer LED and CPU usage LED
  1527. functions. You may choose to use both, but the Timer LED function
  1528. will overrule the CPU usage LED.
  1529. config LEDS_CPU
  1530. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  1531. !ARCH_OMAP) \
  1532. || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1533. || MACH_OMAP_PERSEUS2
  1534. depends on LEDS
  1535. help
  1536. If you say Y here, the red LED will be used to give a good real
  1537. time indication of CPU usage, by lighting whenever the idle task
  1538. is not currently executing.
  1539. The LART uses the same LED for both Timer LED and CPU usage LED
  1540. functions. You may choose to use both, but the Timer LED function
  1541. will overrule the CPU usage LED.
  1542. config ALIGNMENT_TRAP
  1543. bool
  1544. depends on CPU_CP15_MMU
  1545. default y if !ARCH_EBSA110
  1546. select HAVE_PROC_CPU if PROC_FS
  1547. help
  1548. ARM processors cannot fetch/store information which is not
  1549. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  1550. address divisible by 4. On 32-bit ARM processors, these non-aligned
  1551. fetch/store instructions will be emulated in software if you say
  1552. here, which has a severe performance impact. This is necessary for
  1553. correct operation of some network protocols. With an IP-only
  1554. configuration it is safe to say N, otherwise say Y.
  1555. config UACCESS_WITH_MEMCPY
  1556. bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
  1557. depends on MMU && EXPERIMENTAL
  1558. default y if CPU_FEROCEON
  1559. help
  1560. Implement faster copy_to_user and clear_user methods for CPU
  1561. cores where a 8-word STM instruction give significantly higher
  1562. memory write throughput than a sequence of individual 32bit stores.
  1563. A possible side effect is a slight increase in scheduling latency
  1564. between threads sharing the same address space if they invoke
  1565. such copy operations with large buffers.
  1566. However, if the CPU data cache is using a write-allocate mode,
  1567. this option is unlikely to provide any performance gain.
  1568. config SECCOMP
  1569. bool
  1570. prompt "Enable seccomp to safely compute untrusted bytecode"
  1571. ---help---
  1572. This kernel feature is useful for number crunching applications
  1573. that may need to compute untrusted bytecode during their
  1574. execution. By using pipes or other transports made available to
  1575. the process as file descriptors supporting the read/write
  1576. syscalls, it's possible to isolate those applications in
  1577. their own address space using seccomp. Once seccomp is
  1578. enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
  1579. and the task is only allowed to execute a few safe syscalls
  1580. defined by each seccomp mode.
  1581. config CC_STACKPROTECTOR
  1582. bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
  1583. depends on EXPERIMENTAL
  1584. help
  1585. This option turns on the -fstack-protector GCC feature. This
  1586. feature puts, at the beginning of functions, a canary value on
  1587. the stack just before the return address, and validates
  1588. the value just before actually returning. Stack based buffer
  1589. overflows (that need to overwrite this return address) now also
  1590. overwrite the canary, which gets detected and the attack is then
  1591. neutralized via a kernel panic.
  1592. This feature requires gcc version 4.2 or above.
  1593. config DEPRECATED_PARAM_STRUCT
  1594. bool "Provide old way to pass kernel parameters"
  1595. help
  1596. This was deprecated in 2001 and announced to live on for 5 years.
  1597. Some old boot loaders still use this way.
  1598. endmenu
  1599. menu "Boot options"
  1600. config USE_OF
  1601. bool "Flattened Device Tree support"
  1602. select OF
  1603. select OF_EARLY_FLATTREE
  1604. select IRQ_DOMAIN
  1605. help
  1606. Include support for flattened device tree machine descriptions.
  1607. # Compressed boot loader in ROM. Yes, we really want to ask about
  1608. # TEXT and BSS so we preserve their values in the config files.
  1609. config ZBOOT_ROM_TEXT
  1610. hex "Compressed ROM boot loader base address"
  1611. default "0"
  1612. help
  1613. The physical address at which the ROM-able zImage is to be
  1614. placed in the target. Platforms which normally make use of
  1615. ROM-able zImage formats normally set this to a suitable
  1616. value in their defconfig file.
  1617. If ZBOOT_ROM is not enabled, this has no effect.
  1618. config ZBOOT_ROM_BSS
  1619. hex "Compressed ROM boot loader BSS address"
  1620. default "0"
  1621. help
  1622. The base address of an area of read/write memory in the target
  1623. for the ROM-able zImage which must be available while the
  1624. decompressor is running. It must be large enough to hold the
  1625. entire decompressed kernel plus an additional 128 KiB.
  1626. Platforms which normally make use of ROM-able zImage formats
  1627. normally set this to a suitable value in their defconfig file.
  1628. If ZBOOT_ROM is not enabled, this has no effect.
  1629. config ZBOOT_ROM
  1630. bool "Compressed boot loader in ROM/flash"
  1631. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  1632. help
  1633. Say Y here if you intend to execute your compressed kernel image
  1634. (zImage) directly from ROM or flash. If unsure, say N.
  1635. choice
  1636. prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)"
  1637. depends on ZBOOT_ROM && ARCH_SH7372 && EXPERIMENTAL
  1638. default ZBOOT_ROM_NONE
  1639. help
  1640. Include experimental SD/MMC loading code in the ROM-able zImage.
  1641. With this enabled it is possible to write the the ROM-able zImage
  1642. kernel image to an MMC or SD card and boot the kernel straight
  1643. from the reset vector. At reset the processor Mask ROM will load
  1644. the first part of the the ROM-able zImage which in turn loads the
  1645. rest the kernel image to RAM.
  1646. config ZBOOT_ROM_NONE
  1647. bool "No SD/MMC loader in zImage (EXPERIMENTAL)"
  1648. help
  1649. Do not load image from SD or MMC
  1650. config ZBOOT_ROM_MMCIF
  1651. bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
  1652. help
  1653. Load image from MMCIF hardware block.
  1654. config ZBOOT_ROM_SH_MOBILE_SDHI
  1655. bool "Include SuperH Mobile SDHI loader in zImage (EXPERIMENTAL)"
  1656. help
  1657. Load image from SDHI hardware block
  1658. endchoice
  1659. config ARM_APPENDED_DTB
  1660. bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
  1661. depends on OF && !ZBOOT_ROM && EXPERIMENTAL
  1662. help
  1663. With this option, the boot code will look for a device tree binary
  1664. (DTB) appended to zImage
  1665. (e.g. cat zImage <filename>.dtb > zImage_w_dtb).
  1666. This is meant as a backward compatibility convenience for those
  1667. systems with a bootloader that can't be upgraded to accommodate
  1668. the documented boot protocol using a device tree.
  1669. Beware that there is very little in terms of protection against
  1670. this option being confused by leftover garbage in memory that might
  1671. look like a DTB header after a reboot if no actual DTB is appended
  1672. to zImage. Do not leave this option active in a production kernel
  1673. if you don't intend to always append a DTB. Proper passing of the
  1674. location into r2 of a bootloader provided DTB is always preferable
  1675. to this option.
  1676. config ARM_ATAG_DTB_COMPAT
  1677. bool "Supplement the appended DTB with traditional ATAG information"
  1678. depends on ARM_APPENDED_DTB
  1679. help
  1680. Some old bootloaders can't be updated to a DTB capable one, yet
  1681. they provide ATAGs with memory configuration, the ramdisk address,
  1682. the kernel cmdline string, etc. Such information is dynamically
  1683. provided by the bootloader and can't always be stored in a static
  1684. DTB. To allow a device tree enabled kernel to be used with such
  1685. bootloaders, this option allows zImage to extract the information
  1686. from the ATAG list and store it at run time into the appended DTB.
  1687. config CMDLINE
  1688. string "Default kernel command string"
  1689. default ""
  1690. help
  1691. On some architectures (EBSA110 and CATS), there is currently no way
  1692. for the boot loader to pass arguments to the kernel. For these
  1693. architectures, you should supply some command-line options at build
  1694. time by entering them here. As a minimum, you should specify the
  1695. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  1696. choice
  1697. prompt "Kernel command line type" if CMDLINE != ""
  1698. default CMDLINE_FROM_BOOTLOADER
  1699. config CMDLINE_FROM_BOOTLOADER
  1700. bool "Use bootloader kernel arguments if available"
  1701. help
  1702. Uses the command-line options passed by the boot loader. If
  1703. the boot loader doesn't provide any, the default kernel command
  1704. string provided in CMDLINE will be used.
  1705. config CMDLINE_EXTEND
  1706. bool "Extend bootloader kernel arguments"
  1707. help
  1708. The command-line arguments provided by the boot loader will be
  1709. appended to the default kernel command string.
  1710. config CMDLINE_FORCE
  1711. bool "Always use the default kernel command string"
  1712. help
  1713. Always use the default kernel command string, even if the boot
  1714. loader passes other arguments to the kernel.
  1715. This is useful if you cannot or don't want to change the
  1716. command-line options your boot loader passes to the kernel.
  1717. endchoice
  1718. config XIP_KERNEL
  1719. bool "Kernel Execute-In-Place from ROM"
  1720. depends on !ZBOOT_ROM && !ARM_LPAE
  1721. help
  1722. Execute-In-Place allows the kernel to run from non-volatile storage
  1723. directly addressable by the CPU, such as NOR flash. This saves RAM
  1724. space since the text section of the kernel is not loaded from flash
  1725. to RAM. Read-write sections, such as the data section and stack,
  1726. are still copied to RAM. The XIP kernel is not compressed since
  1727. it has to run directly from flash, so it will take more space to
  1728. store it. The flash address used to link the kernel object files,
  1729. and for storing it, is configuration dependent. Therefore, if you
  1730. say Y here, you must know the proper physical address where to
  1731. store the kernel image depending on your own flash memory usage.
  1732. Also note that the make target becomes "make xipImage" rather than
  1733. "make zImage" or "make Image". The final kernel binary to put in
  1734. ROM memory will be arch/arm/boot/xipImage.
  1735. If unsure, say N.
  1736. config XIP_PHYS_ADDR
  1737. hex "XIP Kernel Physical Location"
  1738. depends on XIP_KERNEL
  1739. default "0x00080000"
  1740. help
  1741. This is the physical address in your flash memory the kernel will
  1742. be linked for and stored to. This address is dependent on your
  1743. own flash usage.
  1744. config KEXEC
  1745. bool "Kexec system call (EXPERIMENTAL)"
  1746. depends on EXPERIMENTAL && (!SMP || HOTPLUG_CPU)
  1747. help
  1748. kexec is a system call that implements the ability to shutdown your
  1749. current kernel, and to start another kernel. It is like a reboot
  1750. but it is independent of the system firmware. And like a reboot
  1751. you can start any kernel with it, not just Linux.
  1752. It is an ongoing process to be certain the hardware in a machine
  1753. is properly shutdown, so do not be surprised if this code does not
  1754. initially work for you. It may help to enable device hotplugging
  1755. support.
  1756. config ATAGS_PROC
  1757. bool "Export atags in procfs"
  1758. depends on KEXEC
  1759. default y
  1760. help
  1761. Should the atags used to boot the kernel be exported in an "atags"
  1762. file in procfs. Useful with kexec.
  1763. config CRASH_DUMP
  1764. bool "Build kdump crash kernel (EXPERIMENTAL)"
  1765. depends on EXPERIMENTAL
  1766. help
  1767. Generate crash dump after being started by kexec. This should
  1768. be normally only set in special crash dump kernels which are
  1769. loaded in the main kernel with kexec-tools into a specially
  1770. reserved region and then later executed after a crash by
  1771. kdump/kexec. The crash dump kernel must be compiled to a
  1772. memory address not used by the main kernel
  1773. For more details see Documentation/kdump/kdump.txt
  1774. config AUTO_ZRELADDR
  1775. bool "Auto calculation of the decompressed kernel image address"
  1776. depends on !ZBOOT_ROM && !ARCH_U300
  1777. help
  1778. ZRELADDR is the physical address where the decompressed kernel
  1779. image will be placed. If AUTO_ZRELADDR is selected, the address
  1780. will be determined at run-time by masking the current IP with
  1781. 0xf8000000. This assumes the zImage being placed in the first 128MB
  1782. from start of memory.
  1783. endmenu
  1784. menu "CPU Power Management"
  1785. if ARCH_HAS_CPUFREQ
  1786. source "drivers/cpufreq/Kconfig"
  1787. config CPU_FREQ_IMX
  1788. tristate "CPUfreq driver for i.MX CPUs"
  1789. depends on ARCH_MXC && CPU_FREQ
  1790. help
  1791. This enables the CPUfreq driver for i.MX CPUs.
  1792. config CPU_FREQ_SA1100
  1793. bool
  1794. config CPU_FREQ_SA1110
  1795. bool
  1796. config CPU_FREQ_INTEGRATOR
  1797. tristate "CPUfreq driver for ARM Integrator CPUs"
  1798. depends on ARCH_INTEGRATOR && CPU_FREQ
  1799. default y
  1800. help
  1801. This enables the CPUfreq driver for ARM Integrator CPUs.
  1802. For details, take a look at <file:Documentation/cpu-freq>.
  1803. If in doubt, say Y.
  1804. config CPU_FREQ_PXA
  1805. bool
  1806. depends on CPU_FREQ && ARCH_PXA && PXA25x
  1807. default y
  1808. select CPU_FREQ_TABLE
  1809. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  1810. config CPU_FREQ_S3C
  1811. bool
  1812. help
  1813. Internal configuration node for common cpufreq on Samsung SoC
  1814. config CPU_FREQ_S3C24XX
  1815. bool "CPUfreq driver for Samsung S3C24XX series CPUs (EXPERIMENTAL)"
  1816. depends on ARCH_S3C24XX && CPU_FREQ && EXPERIMENTAL
  1817. select CPU_FREQ_S3C
  1818. help
  1819. This enables the CPUfreq driver for the Samsung S3C24XX family
  1820. of CPUs.
  1821. For details, take a look at <file:Documentation/cpu-freq>.
  1822. If in doubt, say N.
  1823. config CPU_FREQ_S3C24XX_PLL
  1824. bool "Support CPUfreq changing of PLL frequency (EXPERIMENTAL)"
  1825. depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
  1826. help
  1827. Compile in support for changing the PLL frequency from the
  1828. S3C24XX series CPUfreq driver. The PLL takes time to settle
  1829. after a frequency change, so by default it is not enabled.
  1830. This also means that the PLL tables for the selected CPU(s) will
  1831. be built which may increase the size of the kernel image.
  1832. config CPU_FREQ_S3C24XX_DEBUG
  1833. bool "Debug CPUfreq Samsung driver core"
  1834. depends on CPU_FREQ_S3C24XX
  1835. help
  1836. Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
  1837. config CPU_FREQ_S3C24XX_IODEBUG
  1838. bool "Debug CPUfreq Samsung driver IO timing"
  1839. depends on CPU_FREQ_S3C24XX
  1840. help
  1841. Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
  1842. config CPU_FREQ_S3C24XX_DEBUGFS
  1843. bool "Export debugfs for CPUFreq"
  1844. depends on CPU_FREQ_S3C24XX && DEBUG_FS
  1845. help
  1846. Export status information via debugfs.
  1847. endif
  1848. source "drivers/cpuidle/Kconfig"
  1849. endmenu
  1850. menu "Floating point emulation"
  1851. comment "At least one emulation must be selected"
  1852. config FPE_NWFPE
  1853. bool "NWFPE math emulation"
  1854. depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
  1855. ---help---
  1856. Say Y to include the NWFPE floating point emulator in the kernel.
  1857. This is necessary to run most binaries. Linux does not currently
  1858. support floating point hardware so you need to say Y here even if
  1859. your machine has an FPA or floating point co-processor podule.
  1860. You may say N here if you are going to load the Acorn FPEmulator
  1861. early in the bootup.
  1862. config FPE_NWFPE_XP
  1863. bool "Support extended precision"
  1864. depends on FPE_NWFPE
  1865. help
  1866. Say Y to include 80-bit support in the kernel floating-point
  1867. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  1868. Note that gcc does not generate 80-bit operations by default,
  1869. so in most cases this option only enlarges the size of the
  1870. floating point emulator without any good reason.
  1871. You almost surely want to say N here.
  1872. config FPE_FASTFPE
  1873. bool "FastFPE math emulation (EXPERIMENTAL)"
  1874. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  1875. ---help---
  1876. Say Y here to include the FAST floating point emulator in the kernel.
  1877. This is an experimental much faster emulator which now also has full
  1878. precision for the mantissa. It does not support any exceptions.
  1879. It is very simple, and approximately 3-6 times faster than NWFPE.
  1880. It should be sufficient for most programs. It may be not suitable
  1881. for scientific calculations, but you have to check this for yourself.
  1882. If you do not feel you need a faster FP emulation you should better
  1883. choose NWFPE.
  1884. config VFP
  1885. bool "VFP-format floating point maths"
  1886. depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  1887. help
  1888. Say Y to include VFP support code in the kernel. This is needed
  1889. if your hardware includes a VFP unit.
  1890. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  1891. release notes and additional status information.
  1892. Say N if your target does not have VFP hardware.
  1893. config VFPv3
  1894. bool
  1895. depends on VFP
  1896. default y if CPU_V7
  1897. config NEON
  1898. bool "Advanced SIMD (NEON) Extension support"
  1899. depends on VFPv3 && CPU_V7
  1900. help
  1901. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  1902. Extension.
  1903. endmenu
  1904. menu "Userspace binary formats"
  1905. source "fs/Kconfig.binfmt"
  1906. config ARTHUR
  1907. tristate "RISC OS personality"
  1908. depends on !AEABI
  1909. help
  1910. Say Y here to include the kernel code necessary if you want to run
  1911. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  1912. experimental; if this sounds frightening, say N and sleep in peace.
  1913. You can also say M here to compile this support as a module (which
  1914. will be called arthur).
  1915. endmenu
  1916. menu "Power management options"
  1917. source "kernel/power/Kconfig"
  1918. config ARCH_SUSPEND_POSSIBLE
  1919. depends on !ARCH_S5PC100
  1920. depends on CPU_ARM920T || CPU_ARM926T || CPU_SA1100 || \
  1921. CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE
  1922. def_bool y
  1923. config ARM_CPU_SUSPEND
  1924. def_bool PM_SLEEP
  1925. endmenu
  1926. source "net/Kconfig"
  1927. source "drivers/Kconfig"
  1928. source "fs/Kconfig"
  1929. source "arch/arm/Kconfig.debug"
  1930. source "security/Kconfig"
  1931. source "crypto/Kconfig"
  1932. source "lib/Kconfig"