Kconfig 65 KB

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  1. config ARM
  2. bool
  3. default y
  4. select ARCH_HAVE_CUSTOM_GPIO_H
  5. select HAVE_AOUT
  6. select HAVE_DMA_API_DEBUG
  7. select HAVE_IDE if PCI || ISA || PCMCIA
  8. select HAVE_DMA_ATTRS
  9. select HAVE_DMA_CONTIGUOUS if (CPU_V6 || CPU_V6K || CPU_V7)
  10. select HAVE_MEMBLOCK
  11. select RTC_LIB
  12. select SYS_SUPPORTS_APM_EMULATION
  13. select GENERIC_ATOMIC64 if (CPU_V6 || !CPU_32v6K || !AEABI)
  14. select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
  15. select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL
  16. select HAVE_ARCH_KGDB
  17. select HAVE_ARCH_TRACEHOOK
  18. select HAVE_KPROBES if !XIP_KERNEL
  19. select HAVE_KRETPROBES if (HAVE_KPROBES)
  20. select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
  21. select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
  22. select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL)
  23. select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL)
  24. select ARCH_BINFMT_ELF_RANDOMIZE_PIE
  25. select HAVE_GENERIC_DMA_COHERENT
  26. select HAVE_KERNEL_GZIP
  27. select HAVE_KERNEL_LZO
  28. select HAVE_KERNEL_LZMA
  29. select HAVE_KERNEL_XZ
  30. select HAVE_IRQ_WORK
  31. select HAVE_PERF_EVENTS
  32. select PERF_USE_VMALLOC
  33. select HAVE_REGS_AND_STACK_ACCESS_API
  34. select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7))
  35. select HAVE_C_RECORDMCOUNT
  36. select HAVE_GENERIC_HARDIRQS
  37. select HARDIRQS_SW_RESEND
  38. select GENERIC_IRQ_PROBE
  39. select GENERIC_IRQ_SHOW
  40. select GENERIC_IRQ_PROBE
  41. select HARDIRQS_SW_RESEND
  42. select CPU_PM if (SUSPEND || CPU_IDLE)
  43. select GENERIC_PCI_IOMAP
  44. select HAVE_BPF_JIT
  45. select GENERIC_SMP_IDLE_THREAD
  46. select KTIME_SCALAR
  47. select GENERIC_CLOCKEVENTS_BROADCAST if SMP
  48. help
  49. The ARM series is a line of low-power-consumption RISC chip designs
  50. licensed by ARM Ltd and targeted at embedded applications and
  51. handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
  52. manufactured, but legacy ARM-based PC hardware remains popular in
  53. Europe. There is an ARM Linux project with a web page at
  54. <http://www.arm.linux.org.uk/>.
  55. config ARM_HAS_SG_CHAIN
  56. bool
  57. config NEED_SG_DMA_LENGTH
  58. bool
  59. config ARM_DMA_USE_IOMMU
  60. select NEED_SG_DMA_LENGTH
  61. select ARM_HAS_SG_CHAIN
  62. bool
  63. config HAVE_PWM
  64. bool
  65. config MIGHT_HAVE_PCI
  66. bool
  67. config SYS_SUPPORTS_APM_EMULATION
  68. bool
  69. config GENERIC_GPIO
  70. bool
  71. config HAVE_TCM
  72. bool
  73. select GENERIC_ALLOCATOR
  74. config HAVE_PROC_CPU
  75. bool
  76. config NO_IOPORT
  77. bool
  78. config EISA
  79. bool
  80. ---help---
  81. The Extended Industry Standard Architecture (EISA) bus was
  82. developed as an open alternative to the IBM MicroChannel bus.
  83. The EISA bus provided some of the features of the IBM MicroChannel
  84. bus while maintaining backward compatibility with cards made for
  85. the older ISA bus. The EISA bus saw limited use between 1988 and
  86. 1995 when it was made obsolete by the PCI bus.
  87. Say Y here if you are building a kernel for an EISA-based machine.
  88. Otherwise, say N.
  89. config SBUS
  90. bool
  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 GENERIC_LOCKBREAK
  105. bool
  106. default y
  107. depends on SMP && PREEMPT
  108. config RWSEM_GENERIC_SPINLOCK
  109. bool
  110. default y
  111. config RWSEM_XCHGADD_ALGORITHM
  112. bool
  113. config ARCH_HAS_ILOG2_U32
  114. bool
  115. config ARCH_HAS_ILOG2_U64
  116. bool
  117. config ARCH_HAS_CPUFREQ
  118. bool
  119. help
  120. Internal node to signify that the ARCH has CPUFREQ support
  121. and that the relevant menu configurations are displayed for
  122. it.
  123. config GENERIC_HWEIGHT
  124. bool
  125. default y
  126. config GENERIC_CALIBRATE_DELAY
  127. bool
  128. default y
  129. config ARCH_MAY_HAVE_PC_FDC
  130. bool
  131. config ZONE_DMA
  132. bool
  133. config NEED_DMA_MAP_STATE
  134. def_bool y
  135. config ARCH_HAS_DMA_SET_COHERENT_MASK
  136. bool
  137. config GENERIC_ISA_DMA
  138. bool
  139. config FIQ
  140. bool
  141. config NEED_RET_TO_USER
  142. bool
  143. config ARCH_MTD_XIP
  144. bool
  145. config VECTORS_BASE
  146. hex
  147. default 0xffff0000 if MMU || CPU_HIGH_VECTOR
  148. default DRAM_BASE if REMAP_VECTORS_TO_RAM
  149. default 0x00000000
  150. help
  151. The base address of exception vectors.
  152. config ARM_PATCH_PHYS_VIRT
  153. bool "Patch physical to virtual translations at runtime" if EMBEDDED
  154. default y
  155. depends on !XIP_KERNEL && MMU
  156. depends on !ARCH_REALVIEW || !SPARSEMEM
  157. help
  158. Patch phys-to-virt and virt-to-phys translation functions at
  159. boot and module load time according to the position of the
  160. kernel in system memory.
  161. This can only be used with non-XIP MMU kernels where the base
  162. of physical memory is at a 16MB boundary.
  163. Only disable this option if you know that you do not require
  164. this feature (eg, building a kernel for a single machine) and
  165. you need to shrink the kernel to the minimal size.
  166. config NEED_MACH_IO_H
  167. bool
  168. help
  169. Select this when mach/io.h is required to provide special
  170. definitions for this platform. The need for mach/io.h should
  171. be avoided when possible.
  172. config NEED_MACH_MEMORY_H
  173. bool
  174. help
  175. Select this when mach/memory.h is required to provide special
  176. definitions for this platform. The need for mach/memory.h should
  177. be avoided when possible.
  178. config PHYS_OFFSET
  179. hex "Physical address of main memory" if MMU
  180. depends on !ARM_PATCH_PHYS_VIRT && !NEED_MACH_MEMORY_H
  181. default DRAM_BASE if !MMU
  182. help
  183. Please provide the physical address corresponding to the
  184. location of main memory in your system.
  185. config GENERIC_BUG
  186. def_bool y
  187. depends on BUG
  188. source "init/Kconfig"
  189. source "kernel/Kconfig.freezer"
  190. menu "System Type"
  191. config MMU
  192. bool "MMU-based Paged Memory Management Support"
  193. default y
  194. help
  195. Select if you want MMU-based virtualised addressing space
  196. support by paged memory management. If unsure, say 'Y'.
  197. #
  198. # The "ARM system type" choice list is ordered alphabetically by option
  199. # text. Please add new entries in the option alphabetic order.
  200. #
  201. choice
  202. prompt "ARM system type"
  203. default ARCH_VERSATILE
  204. config ARCH_INTEGRATOR
  205. bool "ARM Ltd. Integrator family"
  206. select ARM_AMBA
  207. select ARCH_HAS_CPUFREQ
  208. select CLKDEV_LOOKUP
  209. select HAVE_MACH_CLKDEV
  210. select HAVE_TCM
  211. select ICST
  212. select GENERIC_CLOCKEVENTS
  213. select PLAT_VERSATILE
  214. select PLAT_VERSATILE_FPGA_IRQ
  215. select NEED_MACH_IO_H
  216. select NEED_MACH_MEMORY_H
  217. select SPARSE_IRQ
  218. select MULTI_IRQ_HANDLER
  219. help
  220. Support for ARM's Integrator platform.
  221. config ARCH_REALVIEW
  222. bool "ARM Ltd. RealView family"
  223. select ARM_AMBA
  224. select CLKDEV_LOOKUP
  225. select HAVE_MACH_CLKDEV
  226. select ICST
  227. select GENERIC_CLOCKEVENTS
  228. select ARCH_WANT_OPTIONAL_GPIOLIB
  229. select PLAT_VERSATILE
  230. select PLAT_VERSATILE_CLCD
  231. select ARM_TIMER_SP804
  232. select GPIO_PL061 if GPIOLIB
  233. select NEED_MACH_MEMORY_H
  234. help
  235. This enables support for ARM Ltd RealView boards.
  236. config ARCH_VERSATILE
  237. bool "ARM Ltd. Versatile family"
  238. select ARM_AMBA
  239. select ARM_VIC
  240. select CLKDEV_LOOKUP
  241. select HAVE_MACH_CLKDEV
  242. select ICST
  243. select GENERIC_CLOCKEVENTS
  244. select ARCH_WANT_OPTIONAL_GPIOLIB
  245. select PLAT_VERSATILE
  246. select PLAT_VERSATILE_CLCD
  247. select PLAT_VERSATILE_FPGA_IRQ
  248. select ARM_TIMER_SP804
  249. help
  250. This enables support for ARM Ltd Versatile board.
  251. config ARCH_VEXPRESS
  252. bool "ARM Ltd. Versatile Express family"
  253. select ARCH_WANT_OPTIONAL_GPIOLIB
  254. select ARM_AMBA
  255. select ARM_TIMER_SP804
  256. select CLKDEV_LOOKUP
  257. select HAVE_MACH_CLKDEV
  258. select GENERIC_CLOCKEVENTS
  259. select HAVE_CLK
  260. select HAVE_PATA_PLATFORM
  261. select ICST
  262. select NO_IOPORT
  263. select PLAT_VERSATILE
  264. select PLAT_VERSATILE_CLCD
  265. help
  266. This enables support for the ARM Ltd Versatile Express boards.
  267. config ARCH_AT91
  268. bool "Atmel AT91"
  269. select ARCH_REQUIRE_GPIOLIB
  270. select HAVE_CLK
  271. select CLKDEV_LOOKUP
  272. select IRQ_DOMAIN
  273. select NEED_MACH_IO_H if PCCARD
  274. help
  275. This enables support for systems based on Atmel
  276. AT91RM9200 and AT91SAM9* processors.
  277. config ARCH_BCMRING
  278. bool "Broadcom BCMRING"
  279. depends on MMU
  280. select CPU_V6
  281. select ARM_AMBA
  282. select ARM_TIMER_SP804
  283. select CLKDEV_LOOKUP
  284. select GENERIC_CLOCKEVENTS
  285. select ARCH_WANT_OPTIONAL_GPIOLIB
  286. help
  287. Support for Broadcom's BCMRing platform.
  288. config ARCH_HIGHBANK
  289. bool "Calxeda Highbank-based"
  290. select ARCH_WANT_OPTIONAL_GPIOLIB
  291. select ARM_AMBA
  292. select ARM_GIC
  293. select ARM_TIMER_SP804
  294. select CACHE_L2X0
  295. select CLKDEV_LOOKUP
  296. select CPU_V7
  297. select GENERIC_CLOCKEVENTS
  298. select HAVE_ARM_SCU
  299. select HAVE_SMP
  300. select SPARSE_IRQ
  301. select USE_OF
  302. help
  303. Support for the Calxeda Highbank SoC based boards.
  304. config ARCH_CLPS711X
  305. bool "Cirrus Logic CLPS711x/EP721x/EP731x-based"
  306. select CPU_ARM720T
  307. select ARCH_USES_GETTIMEOFFSET
  308. select NEED_MACH_MEMORY_H
  309. help
  310. Support for Cirrus Logic 711x/721x/731x based boards.
  311. config ARCH_CNS3XXX
  312. bool "Cavium Networks CNS3XXX family"
  313. select CPU_V6K
  314. select GENERIC_CLOCKEVENTS
  315. select ARM_GIC
  316. select MIGHT_HAVE_CACHE_L2X0
  317. select MIGHT_HAVE_PCI
  318. select PCI_DOMAINS if PCI
  319. help
  320. Support for Cavium Networks CNS3XXX platform.
  321. config ARCH_GEMINI
  322. bool "Cortina Systems Gemini"
  323. select CPU_FA526
  324. select ARCH_REQUIRE_GPIOLIB
  325. select ARCH_USES_GETTIMEOFFSET
  326. help
  327. Support for the Cortina Systems Gemini family SoCs
  328. config ARCH_PRIMA2
  329. bool "CSR SiRFSoC PRIMA2 ARM Cortex A9 Platform"
  330. select CPU_V7
  331. select NO_IOPORT
  332. select GENERIC_CLOCKEVENTS
  333. select CLKDEV_LOOKUP
  334. select GENERIC_IRQ_CHIP
  335. select MIGHT_HAVE_CACHE_L2X0
  336. select PINCTRL
  337. select PINCTRL_SIRF
  338. select USE_OF
  339. select ZONE_DMA
  340. help
  341. Support for CSR SiRFSoC ARM Cortex A9 Platform
  342. config ARCH_EBSA110
  343. bool "EBSA-110"
  344. select CPU_SA110
  345. select ISA
  346. select NO_IOPORT
  347. select ARCH_USES_GETTIMEOFFSET
  348. select NEED_MACH_IO_H
  349. select NEED_MACH_MEMORY_H
  350. help
  351. This is an evaluation board for the StrongARM processor available
  352. from Digital. It has limited hardware on-board, including an
  353. Ethernet interface, two PCMCIA sockets, two serial ports and a
  354. parallel port.
  355. config ARCH_EP93XX
  356. bool "EP93xx-based"
  357. select CPU_ARM920T
  358. select ARM_AMBA
  359. select ARM_VIC
  360. select CLKDEV_LOOKUP
  361. select ARCH_REQUIRE_GPIOLIB
  362. select ARCH_HAS_HOLES_MEMORYMODEL
  363. select ARCH_USES_GETTIMEOFFSET
  364. select NEED_MACH_MEMORY_H
  365. help
  366. This enables support for the Cirrus EP93xx series of CPUs.
  367. config ARCH_FOOTBRIDGE
  368. bool "FootBridge"
  369. select CPU_SA110
  370. select FOOTBRIDGE
  371. select GENERIC_CLOCKEVENTS
  372. select HAVE_IDE
  373. select NEED_MACH_IO_H
  374. select NEED_MACH_MEMORY_H
  375. help
  376. Support for systems based on the DC21285 companion chip
  377. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  378. config ARCH_MXC
  379. bool "Freescale MXC/iMX-based"
  380. select GENERIC_CLOCKEVENTS
  381. select ARCH_REQUIRE_GPIOLIB
  382. select CLKDEV_LOOKUP
  383. select CLKSRC_MMIO
  384. select GENERIC_IRQ_CHIP
  385. select MULTI_IRQ_HANDLER
  386. help
  387. Support for Freescale MXC/iMX-based family of processors
  388. config ARCH_MXS
  389. bool "Freescale MXS-based"
  390. select GENERIC_CLOCKEVENTS
  391. select ARCH_REQUIRE_GPIOLIB
  392. select CLKDEV_LOOKUP
  393. select CLKSRC_MMIO
  394. select COMMON_CLK
  395. select HAVE_CLK_PREPARE
  396. select PINCTRL
  397. select USE_OF
  398. help
  399. Support for Freescale MXS-based family of processors
  400. config ARCH_NETX
  401. bool "Hilscher NetX based"
  402. select CLKSRC_MMIO
  403. select CPU_ARM926T
  404. select ARM_VIC
  405. select GENERIC_CLOCKEVENTS
  406. help
  407. This enables support for systems based on the Hilscher NetX Soc
  408. config ARCH_H720X
  409. bool "Hynix HMS720x-based"
  410. select CPU_ARM720T
  411. select ISA_DMA_API
  412. select ARCH_USES_GETTIMEOFFSET
  413. help
  414. This enables support for systems based on the Hynix HMS720x
  415. config ARCH_IOP13XX
  416. bool "IOP13xx-based"
  417. depends on MMU
  418. select CPU_XSC3
  419. select PLAT_IOP
  420. select PCI
  421. select ARCH_SUPPORTS_MSI
  422. select VMSPLIT_1G
  423. select NEED_MACH_IO_H
  424. select NEED_MACH_MEMORY_H
  425. select NEED_RET_TO_USER
  426. help
  427. Support for Intel's IOP13XX (XScale) family of processors.
  428. config ARCH_IOP32X
  429. bool "IOP32x-based"
  430. depends on MMU
  431. select CPU_XSCALE
  432. select NEED_MACH_IO_H
  433. select NEED_RET_TO_USER
  434. select PLAT_IOP
  435. select PCI
  436. select ARCH_REQUIRE_GPIOLIB
  437. help
  438. Support for Intel's 80219 and IOP32X (XScale) family of
  439. processors.
  440. config ARCH_IOP33X
  441. bool "IOP33x-based"
  442. depends on MMU
  443. select CPU_XSCALE
  444. select NEED_MACH_IO_H
  445. select NEED_RET_TO_USER
  446. select PLAT_IOP
  447. select PCI
  448. select ARCH_REQUIRE_GPIOLIB
  449. help
  450. Support for Intel's IOP33X (XScale) family of processors.
  451. config ARCH_IXP4XX
  452. bool "IXP4xx-based"
  453. depends on MMU
  454. select ARCH_HAS_DMA_SET_COHERENT_MASK
  455. select CLKSRC_MMIO
  456. select CPU_XSCALE
  457. select ARCH_REQUIRE_GPIOLIB
  458. select GENERIC_CLOCKEVENTS
  459. select MIGHT_HAVE_PCI
  460. select NEED_MACH_IO_H
  461. select DMABOUNCE if PCI
  462. help
  463. Support for Intel's IXP4XX (XScale) family of processors.
  464. config ARCH_DOVE
  465. bool "Marvell Dove"
  466. select CPU_V7
  467. select PCI
  468. select ARCH_REQUIRE_GPIOLIB
  469. select GENERIC_CLOCKEVENTS
  470. select NEED_MACH_IO_H
  471. select PLAT_ORION
  472. help
  473. Support for the Marvell Dove SoC 88AP510
  474. config ARCH_KIRKWOOD
  475. bool "Marvell Kirkwood"
  476. select CPU_FEROCEON
  477. select PCI
  478. select ARCH_REQUIRE_GPIOLIB
  479. select GENERIC_CLOCKEVENTS
  480. select NEED_MACH_IO_H
  481. select PLAT_ORION
  482. help
  483. Support for the following Marvell Kirkwood series SoCs:
  484. 88F6180, 88F6192 and 88F6281.
  485. config ARCH_LPC32XX
  486. bool "NXP LPC32XX"
  487. select CLKSRC_MMIO
  488. select CPU_ARM926T
  489. select ARCH_REQUIRE_GPIOLIB
  490. select HAVE_IDE
  491. select ARM_AMBA
  492. select USB_ARCH_HAS_OHCI
  493. select CLKDEV_LOOKUP
  494. select GENERIC_CLOCKEVENTS
  495. select USE_OF
  496. help
  497. Support for the NXP LPC32XX family of processors
  498. config ARCH_MV78XX0
  499. bool "Marvell MV78xx0"
  500. select CPU_FEROCEON
  501. select PCI
  502. select ARCH_REQUIRE_GPIOLIB
  503. select GENERIC_CLOCKEVENTS
  504. select NEED_MACH_IO_H
  505. select PLAT_ORION
  506. help
  507. Support for the following Marvell MV78xx0 series SoCs:
  508. MV781x0, MV782x0.
  509. config ARCH_ORION5X
  510. bool "Marvell Orion"
  511. depends on MMU
  512. select CPU_FEROCEON
  513. select PCI
  514. select ARCH_REQUIRE_GPIOLIB
  515. select GENERIC_CLOCKEVENTS
  516. select PLAT_ORION
  517. help
  518. Support for the following Marvell Orion 5x series SoCs:
  519. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  520. Orion-2 (5281), Orion-1-90 (6183).
  521. config ARCH_MMP
  522. bool "Marvell PXA168/910/MMP2"
  523. depends on MMU
  524. select ARCH_REQUIRE_GPIOLIB
  525. select CLKDEV_LOOKUP
  526. select GENERIC_CLOCKEVENTS
  527. select GPIO_PXA
  528. select IRQ_DOMAIN
  529. select PLAT_PXA
  530. select SPARSE_IRQ
  531. select GENERIC_ALLOCATOR
  532. help
  533. Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
  534. config ARCH_KS8695
  535. bool "Micrel/Kendin KS8695"
  536. select CPU_ARM922T
  537. select ARCH_REQUIRE_GPIOLIB
  538. select ARCH_USES_GETTIMEOFFSET
  539. select NEED_MACH_MEMORY_H
  540. help
  541. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  542. System-on-Chip devices.
  543. config ARCH_W90X900
  544. bool "Nuvoton W90X900 CPU"
  545. select CPU_ARM926T
  546. select ARCH_REQUIRE_GPIOLIB
  547. select CLKDEV_LOOKUP
  548. select CLKSRC_MMIO
  549. select GENERIC_CLOCKEVENTS
  550. help
  551. Support for Nuvoton (Winbond logic dept.) ARM9 processor,
  552. At present, the w90x900 has been renamed nuc900, regarding
  553. the ARM series product line, you can login the following
  554. link address to know more.
  555. <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
  556. ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
  557. config ARCH_TEGRA
  558. bool "NVIDIA Tegra"
  559. select CLKDEV_LOOKUP
  560. select CLKSRC_MMIO
  561. select GENERIC_CLOCKEVENTS
  562. select GENERIC_GPIO
  563. select HAVE_CLK
  564. select HAVE_SMP
  565. select MIGHT_HAVE_CACHE_L2X0
  566. select NEED_MACH_IO_H if PCI
  567. select ARCH_HAS_CPUFREQ
  568. select USE_OF
  569. help
  570. This enables support for NVIDIA Tegra based systems (Tegra APX,
  571. Tegra 6xx and Tegra 2 series).
  572. config ARCH_PICOXCELL
  573. bool "Picochip picoXcell"
  574. select ARCH_REQUIRE_GPIOLIB
  575. select ARM_PATCH_PHYS_VIRT
  576. select ARM_VIC
  577. select CPU_V6K
  578. select DW_APB_TIMER
  579. select GENERIC_CLOCKEVENTS
  580. select GENERIC_GPIO
  581. select HAVE_TCM
  582. select NO_IOPORT
  583. select SPARSE_IRQ
  584. select USE_OF
  585. help
  586. This enables support for systems based on the Picochip picoXcell
  587. family of Femtocell devices. The picoxcell support requires device tree
  588. for all boards.
  589. config ARCH_PNX4008
  590. bool "Philips Nexperia PNX4008 Mobile"
  591. select CPU_ARM926T
  592. select CLKDEV_LOOKUP
  593. select ARCH_USES_GETTIMEOFFSET
  594. help
  595. This enables support for Philips PNX4008 mobile platform.
  596. config ARCH_PXA
  597. bool "PXA2xx/PXA3xx-based"
  598. depends on MMU
  599. select ARCH_MTD_XIP
  600. select ARCH_HAS_CPUFREQ
  601. select CLKDEV_LOOKUP
  602. select CLKSRC_MMIO
  603. select ARCH_REQUIRE_GPIOLIB
  604. select GENERIC_CLOCKEVENTS
  605. select GPIO_PXA
  606. select PLAT_PXA
  607. select SPARSE_IRQ
  608. select AUTO_ZRELADDR
  609. select MULTI_IRQ_HANDLER
  610. select ARM_CPU_SUSPEND if PM
  611. select HAVE_IDE
  612. help
  613. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  614. config ARCH_MSM
  615. bool "Qualcomm MSM"
  616. select HAVE_CLK
  617. select GENERIC_CLOCKEVENTS
  618. select ARCH_REQUIRE_GPIOLIB
  619. select CLKDEV_LOOKUP
  620. help
  621. Support for Qualcomm MSM/QSD based systems. This runs on the
  622. apps processor of the MSM/QSD and depends on a shared memory
  623. interface to the modem processor which runs the baseband
  624. stack and controls some vital subsystems
  625. (clock and power control, etc).
  626. config ARCH_SHMOBILE
  627. bool "Renesas SH-Mobile / R-Mobile"
  628. select HAVE_CLK
  629. select CLKDEV_LOOKUP
  630. select HAVE_MACH_CLKDEV
  631. select HAVE_SMP
  632. select GENERIC_CLOCKEVENTS
  633. select MIGHT_HAVE_CACHE_L2X0
  634. select NO_IOPORT
  635. select SPARSE_IRQ
  636. select MULTI_IRQ_HANDLER
  637. select PM_GENERIC_DOMAINS if PM
  638. select NEED_MACH_MEMORY_H
  639. help
  640. Support for Renesas's SH-Mobile and R-Mobile ARM platforms.
  641. config ARCH_RPC
  642. bool "RiscPC"
  643. select ARCH_ACORN
  644. select FIQ
  645. select ARCH_MAY_HAVE_PC_FDC
  646. select HAVE_PATA_PLATFORM
  647. select ISA_DMA_API
  648. select NO_IOPORT
  649. select ARCH_SPARSEMEM_ENABLE
  650. select ARCH_USES_GETTIMEOFFSET
  651. select HAVE_IDE
  652. select NEED_MACH_IO_H
  653. select NEED_MACH_MEMORY_H
  654. help
  655. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  656. CD-ROM interface, serial and parallel port, and the floppy drive.
  657. config ARCH_SA1100
  658. bool "SA1100-based"
  659. select CLKSRC_MMIO
  660. select CPU_SA1100
  661. select ISA
  662. select ARCH_SPARSEMEM_ENABLE
  663. select ARCH_MTD_XIP
  664. select ARCH_HAS_CPUFREQ
  665. select CPU_FREQ
  666. select GENERIC_CLOCKEVENTS
  667. select CLKDEV_LOOKUP
  668. select ARCH_REQUIRE_GPIOLIB
  669. select HAVE_IDE
  670. select NEED_MACH_MEMORY_H
  671. select SPARSE_IRQ
  672. help
  673. Support for StrongARM 11x0 based boards.
  674. config ARCH_S3C24XX
  675. bool "Samsung S3C24XX SoCs"
  676. select GENERIC_GPIO
  677. select ARCH_HAS_CPUFREQ
  678. select HAVE_CLK
  679. select CLKDEV_LOOKUP
  680. select ARCH_USES_GETTIMEOFFSET
  681. select HAVE_S3C2410_I2C if I2C
  682. select HAVE_S3C_RTC if RTC_CLASS
  683. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  684. select NEED_MACH_IO_H
  685. help
  686. Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443
  687. and S3C2450 SoCs based systems, such as the Simtec Electronics BAST
  688. (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or the
  689. Samsung SMDK2410 development board (and derivatives).
  690. config ARCH_S3C64XX
  691. bool "Samsung S3C64XX"
  692. select PLAT_SAMSUNG
  693. select CPU_V6
  694. select ARM_VIC
  695. select HAVE_CLK
  696. select HAVE_TCM
  697. select CLKDEV_LOOKUP
  698. select NO_IOPORT
  699. select ARCH_USES_GETTIMEOFFSET
  700. select ARCH_HAS_CPUFREQ
  701. select ARCH_REQUIRE_GPIOLIB
  702. select SAMSUNG_CLKSRC
  703. select SAMSUNG_IRQ_VIC_TIMER
  704. select S3C_GPIO_TRACK
  705. select S3C_DEV_NAND
  706. select USB_ARCH_HAS_OHCI
  707. select SAMSUNG_GPIOLIB_4BIT
  708. select HAVE_S3C2410_I2C if I2C
  709. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  710. help
  711. Samsung S3C64XX series based systems
  712. config ARCH_S5P64X0
  713. bool "Samsung S5P6440 S5P6450"
  714. select CPU_V6
  715. select GENERIC_GPIO
  716. select HAVE_CLK
  717. select CLKDEV_LOOKUP
  718. select CLKSRC_MMIO
  719. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  720. select GENERIC_CLOCKEVENTS
  721. select HAVE_S3C2410_I2C if I2C
  722. select HAVE_S3C_RTC if RTC_CLASS
  723. help
  724. Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
  725. SMDK6450.
  726. config ARCH_S5PC100
  727. bool "Samsung S5PC100"
  728. select GENERIC_GPIO
  729. select HAVE_CLK
  730. select CLKDEV_LOOKUP
  731. select CPU_V7
  732. select ARCH_USES_GETTIMEOFFSET
  733. select HAVE_S3C2410_I2C if I2C
  734. select HAVE_S3C_RTC if RTC_CLASS
  735. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  736. help
  737. Samsung S5PC100 series based systems
  738. config ARCH_S5PV210
  739. bool "Samsung S5PV210/S5PC110"
  740. select CPU_V7
  741. select ARCH_SPARSEMEM_ENABLE
  742. select ARCH_HAS_HOLES_MEMORYMODEL
  743. select GENERIC_GPIO
  744. select HAVE_CLK
  745. select CLKDEV_LOOKUP
  746. select CLKSRC_MMIO
  747. select ARCH_HAS_CPUFREQ
  748. select GENERIC_CLOCKEVENTS
  749. select HAVE_S3C2410_I2C if I2C
  750. select HAVE_S3C_RTC if RTC_CLASS
  751. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  752. select NEED_MACH_MEMORY_H
  753. help
  754. Samsung S5PV210/S5PC110 series based systems
  755. config ARCH_EXYNOS
  756. bool "SAMSUNG EXYNOS"
  757. select CPU_V7
  758. select ARCH_SPARSEMEM_ENABLE
  759. select ARCH_HAS_HOLES_MEMORYMODEL
  760. select GENERIC_GPIO
  761. select HAVE_CLK
  762. select CLKDEV_LOOKUP
  763. select ARCH_HAS_CPUFREQ
  764. select GENERIC_CLOCKEVENTS
  765. select HAVE_S3C_RTC if RTC_CLASS
  766. select HAVE_S3C2410_I2C if I2C
  767. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  768. select NEED_MACH_MEMORY_H
  769. help
  770. Support for SAMSUNG's EXYNOS SoCs (EXYNOS4/5)
  771. config ARCH_SHARK
  772. bool "Shark"
  773. select CPU_SA110
  774. select ISA
  775. select ISA_DMA
  776. select ZONE_DMA
  777. select PCI
  778. select ARCH_USES_GETTIMEOFFSET
  779. select NEED_MACH_MEMORY_H
  780. select NEED_MACH_IO_H
  781. help
  782. Support for the StrongARM based Digital DNARD machine, also known
  783. as "Shark" (<http://www.shark-linux.de/shark.html>).
  784. config ARCH_U300
  785. bool "ST-Ericsson U300 Series"
  786. depends on MMU
  787. select CLKSRC_MMIO
  788. select CPU_ARM926T
  789. select HAVE_TCM
  790. select ARM_AMBA
  791. select ARM_PATCH_PHYS_VIRT
  792. select ARM_VIC
  793. select GENERIC_CLOCKEVENTS
  794. select CLKDEV_LOOKUP
  795. select HAVE_MACH_CLKDEV
  796. select GENERIC_GPIO
  797. select ARCH_REQUIRE_GPIOLIB
  798. help
  799. Support for ST-Ericsson U300 series mobile platforms.
  800. config ARCH_U8500
  801. bool "ST-Ericsson U8500 Series"
  802. depends on MMU
  803. select CPU_V7
  804. select ARM_AMBA
  805. select GENERIC_CLOCKEVENTS
  806. select CLKDEV_LOOKUP
  807. select ARCH_REQUIRE_GPIOLIB
  808. select ARCH_HAS_CPUFREQ
  809. select HAVE_SMP
  810. select MIGHT_HAVE_CACHE_L2X0
  811. help
  812. Support for ST-Ericsson's Ux500 architecture
  813. config ARCH_NOMADIK
  814. bool "STMicroelectronics Nomadik"
  815. select ARM_AMBA
  816. select ARM_VIC
  817. select CPU_ARM926T
  818. select CLKDEV_LOOKUP
  819. select GENERIC_CLOCKEVENTS
  820. select PINCTRL
  821. select MIGHT_HAVE_CACHE_L2X0
  822. select ARCH_REQUIRE_GPIOLIB
  823. help
  824. Support for the Nomadik platform by ST-Ericsson
  825. config ARCH_DAVINCI
  826. bool "TI DaVinci"
  827. select GENERIC_CLOCKEVENTS
  828. select ARCH_REQUIRE_GPIOLIB
  829. select ZONE_DMA
  830. select HAVE_IDE
  831. select CLKDEV_LOOKUP
  832. select GENERIC_ALLOCATOR
  833. select GENERIC_IRQ_CHIP
  834. select ARCH_HAS_HOLES_MEMORYMODEL
  835. help
  836. Support for TI's DaVinci platform.
  837. config ARCH_OMAP
  838. bool "TI OMAP"
  839. select HAVE_CLK
  840. select ARCH_REQUIRE_GPIOLIB
  841. select ARCH_HAS_CPUFREQ
  842. select CLKSRC_MMIO
  843. select GENERIC_CLOCKEVENTS
  844. select ARCH_HAS_HOLES_MEMORYMODEL
  845. help
  846. Support for TI's OMAP platform (OMAP1/2/3/4).
  847. config PLAT_SPEAR
  848. bool "ST SPEAr"
  849. select ARM_AMBA
  850. select ARCH_REQUIRE_GPIOLIB
  851. select CLKDEV_LOOKUP
  852. select COMMON_CLK
  853. select CLKSRC_MMIO
  854. select GENERIC_CLOCKEVENTS
  855. select HAVE_CLK
  856. help
  857. Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
  858. config ARCH_VT8500
  859. bool "VIA/WonderMedia 85xx"
  860. select CPU_ARM926T
  861. select GENERIC_GPIO
  862. select ARCH_HAS_CPUFREQ
  863. select GENERIC_CLOCKEVENTS
  864. select ARCH_REQUIRE_GPIOLIB
  865. select HAVE_PWM
  866. help
  867. Support for VIA/WonderMedia VT8500/WM85xx System-on-Chip.
  868. config ARCH_ZYNQ
  869. bool "Xilinx Zynq ARM Cortex A9 Platform"
  870. select CPU_V7
  871. select GENERIC_CLOCKEVENTS
  872. select CLKDEV_LOOKUP
  873. select ARM_GIC
  874. select ARM_AMBA
  875. select ICST
  876. select MIGHT_HAVE_CACHE_L2X0
  877. select USE_OF
  878. help
  879. Support for Xilinx Zynq ARM Cortex A9 Platform
  880. endchoice
  881. #
  882. # This is sorted alphabetically by mach-* pathname. However, plat-*
  883. # Kconfigs may be included either alphabetically (according to the
  884. # plat- suffix) or along side the corresponding mach-* source.
  885. #
  886. source "arch/arm/mach-at91/Kconfig"
  887. source "arch/arm/mach-bcmring/Kconfig"
  888. source "arch/arm/mach-clps711x/Kconfig"
  889. source "arch/arm/mach-cns3xxx/Kconfig"
  890. source "arch/arm/mach-davinci/Kconfig"
  891. source "arch/arm/mach-dove/Kconfig"
  892. source "arch/arm/mach-ep93xx/Kconfig"
  893. source "arch/arm/mach-footbridge/Kconfig"
  894. source "arch/arm/mach-gemini/Kconfig"
  895. source "arch/arm/mach-h720x/Kconfig"
  896. source "arch/arm/mach-integrator/Kconfig"
  897. source "arch/arm/mach-iop32x/Kconfig"
  898. source "arch/arm/mach-iop33x/Kconfig"
  899. source "arch/arm/mach-iop13xx/Kconfig"
  900. source "arch/arm/mach-ixp4xx/Kconfig"
  901. source "arch/arm/mach-kirkwood/Kconfig"
  902. source "arch/arm/mach-ks8695/Kconfig"
  903. source "arch/arm/mach-lpc32xx/Kconfig"
  904. source "arch/arm/mach-msm/Kconfig"
  905. source "arch/arm/mach-mv78xx0/Kconfig"
  906. source "arch/arm/plat-mxc/Kconfig"
  907. source "arch/arm/mach-mxs/Kconfig"
  908. source "arch/arm/mach-netx/Kconfig"
  909. source "arch/arm/mach-nomadik/Kconfig"
  910. source "arch/arm/plat-nomadik/Kconfig"
  911. source "arch/arm/plat-omap/Kconfig"
  912. source "arch/arm/mach-omap1/Kconfig"
  913. source "arch/arm/mach-omap2/Kconfig"
  914. source "arch/arm/mach-orion5x/Kconfig"
  915. source "arch/arm/mach-pxa/Kconfig"
  916. source "arch/arm/plat-pxa/Kconfig"
  917. source "arch/arm/mach-mmp/Kconfig"
  918. source "arch/arm/mach-realview/Kconfig"
  919. source "arch/arm/mach-sa1100/Kconfig"
  920. source "arch/arm/plat-samsung/Kconfig"
  921. source "arch/arm/plat-s3c24xx/Kconfig"
  922. source "arch/arm/plat-spear/Kconfig"
  923. source "arch/arm/mach-s3c24xx/Kconfig"
  924. if ARCH_S3C24XX
  925. source "arch/arm/mach-s3c2412/Kconfig"
  926. source "arch/arm/mach-s3c2440/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. config PLAT_ORION
  951. bool
  952. select CLKSRC_MMIO
  953. select GENERIC_IRQ_CHIP
  954. select COMMON_CLK
  955. config PLAT_PXA
  956. bool
  957. config PLAT_VERSATILE
  958. bool
  959. config ARM_TIMER_SP804
  960. bool
  961. select CLKSRC_MMIO
  962. select HAVE_SCHED_CLOCK
  963. source arch/arm/mm/Kconfig
  964. config ARM_NR_BANKS
  965. int
  966. default 16 if ARCH_EP93XX
  967. default 8
  968. config IWMMXT
  969. bool "Enable iWMMXt support"
  970. depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
  971. default y if PXA27x || PXA3xx || PXA95x || ARCH_MMP
  972. help
  973. Enable support for iWMMXt context switching at run time if
  974. running on a CPU that supports it.
  975. config XSCALE_PMU
  976. bool
  977. depends on CPU_XSCALE
  978. default y
  979. config CPU_HAS_PMU
  980. depends on (CPU_V6 || CPU_V6K || CPU_V7 || XSCALE_PMU) && \
  981. (!ARCH_OMAP3 || OMAP3_EMU)
  982. default y
  983. bool
  984. config MULTI_IRQ_HANDLER
  985. bool
  986. help
  987. Allow each machine to specify it's own IRQ handler at run time.
  988. if !MMU
  989. source "arch/arm/Kconfig-nommu"
  990. endif
  991. config ARM_ERRATA_326103
  992. bool "ARM errata: FSR write bit incorrect on a SWP to read-only memory"
  993. depends on CPU_V6
  994. help
  995. Executing a SWP instruction to read-only memory does not set bit 11
  996. of the FSR on the ARM 1136 prior to r1p0. This causes the kernel to
  997. treat the access as a read, preventing a COW from occurring and
  998. causing the faulting task to livelock.
  999. config ARM_ERRATA_411920
  1000. bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
  1001. depends on CPU_V6 || CPU_V6K
  1002. help
  1003. Invalidation of the Instruction Cache operation can
  1004. fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
  1005. It does not affect the MPCore. This option enables the ARM Ltd.
  1006. recommended workaround.
  1007. config ARM_ERRATA_430973
  1008. bool "ARM errata: Stale prediction on replaced interworking branch"
  1009. depends on CPU_V7
  1010. help
  1011. This option enables the workaround for the 430973 Cortex-A8
  1012. (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
  1013. interworking branch is replaced with another code sequence at the
  1014. same virtual address, whether due to self-modifying code or virtual
  1015. to physical address re-mapping, Cortex-A8 does not recover from the
  1016. stale interworking branch prediction. This results in Cortex-A8
  1017. executing the new code sequence in the incorrect ARM or Thumb state.
  1018. The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
  1019. and also flushes the branch target cache at every context switch.
  1020. Note that setting specific bits in the ACTLR register may not be
  1021. available in non-secure mode.
  1022. config ARM_ERRATA_458693
  1023. bool "ARM errata: Processor deadlock when a false hazard is created"
  1024. depends on CPU_V7
  1025. help
  1026. This option enables the workaround for the 458693 Cortex-A8 (r2p0)
  1027. erratum. For very specific sequences of memory operations, it is
  1028. possible for a hazard condition intended for a cache line to instead
  1029. be incorrectly associated with a different cache line. This false
  1030. hazard might then cause a processor deadlock. The workaround enables
  1031. the L1 caching of the NEON accesses and disables the PLD instruction
  1032. in the ACTLR register. Note that setting specific bits in the ACTLR
  1033. register may not be available in non-secure mode.
  1034. config ARM_ERRATA_460075
  1035. bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
  1036. depends on CPU_V7
  1037. help
  1038. This option enables the workaround for the 460075 Cortex-A8 (r2p0)
  1039. erratum. Any asynchronous access to the L2 cache may encounter a
  1040. situation in which recent store transactions to the L2 cache are lost
  1041. and overwritten with stale memory contents from external memory. The
  1042. workaround disables the write-allocate mode for the L2 cache via the
  1043. ACTLR register. Note that setting specific bits in the ACTLR register
  1044. may not be available in non-secure mode.
  1045. config ARM_ERRATA_742230
  1046. bool "ARM errata: DMB operation may be faulty"
  1047. depends on CPU_V7 && SMP
  1048. help
  1049. This option enables the workaround for the 742230 Cortex-A9
  1050. (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
  1051. between two write operations may not ensure the correct visibility
  1052. ordering of the two writes. This workaround sets a specific bit in
  1053. the diagnostic register of the Cortex-A9 which causes the DMB
  1054. instruction to behave as a DSB, ensuring the correct behaviour of
  1055. the two writes.
  1056. config ARM_ERRATA_742231
  1057. bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
  1058. depends on CPU_V7 && SMP
  1059. help
  1060. This option enables the workaround for the 742231 Cortex-A9
  1061. (r2p0..r2p2) erratum. Under certain conditions, specific to the
  1062. Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
  1063. accessing some data located in the same cache line, may get corrupted
  1064. data due to bad handling of the address hazard when the line gets
  1065. replaced from one of the CPUs at the same time as another CPU is
  1066. accessing it. This workaround sets specific bits in the diagnostic
  1067. register of the Cortex-A9 which reduces the linefill issuing
  1068. capabilities of the processor.
  1069. config PL310_ERRATA_588369
  1070. bool "PL310 errata: Clean & Invalidate maintenance operations do not invalidate clean lines"
  1071. depends on CACHE_L2X0
  1072. help
  1073. The PL310 L2 cache controller implements three types of Clean &
  1074. Invalidate maintenance operations: by Physical Address
  1075. (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
  1076. They are architecturally defined to behave as the execution of a
  1077. clean operation followed immediately by an invalidate operation,
  1078. both performing to the same memory location. This functionality
  1079. is not correctly implemented in PL310 as clean lines are not
  1080. invalidated as a result of these operations.
  1081. config ARM_ERRATA_720789
  1082. bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
  1083. depends on CPU_V7
  1084. help
  1085. This option enables the workaround for the 720789 Cortex-A9 (prior to
  1086. r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
  1087. broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
  1088. As a consequence of this erratum, some TLB entries which should be
  1089. invalidated are not, resulting in an incoherency in the system page
  1090. tables. The workaround changes the TLB flushing routines to invalidate
  1091. entries regardless of the ASID.
  1092. config PL310_ERRATA_727915
  1093. bool "PL310 errata: Background Clean & Invalidate by Way operation can cause data corruption"
  1094. depends on CACHE_L2X0
  1095. help
  1096. PL310 implements the Clean & Invalidate by Way L2 cache maintenance
  1097. operation (offset 0x7FC). This operation runs in background so that
  1098. PL310 can handle normal accesses while it is in progress. Under very
  1099. rare circumstances, due to this erratum, write data can be lost when
  1100. PL310 treats a cacheable write transaction during a Clean &
  1101. Invalidate by Way operation.
  1102. config ARM_ERRATA_743622
  1103. bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
  1104. depends on CPU_V7
  1105. help
  1106. This option enables the workaround for the 743622 Cortex-A9
  1107. (r2p*) erratum. Under very rare conditions, a faulty
  1108. optimisation in the Cortex-A9 Store Buffer may lead to data
  1109. corruption. This workaround sets a specific bit in the diagnostic
  1110. register of the Cortex-A9 which disables the Store Buffer
  1111. optimisation, preventing the defect from occurring. This has no
  1112. visible impact on the overall performance or power consumption of the
  1113. processor.
  1114. config ARM_ERRATA_751472
  1115. bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
  1116. depends on CPU_V7
  1117. help
  1118. This option enables the workaround for the 751472 Cortex-A9 (prior
  1119. to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
  1120. completion of a following broadcasted operation if the second
  1121. operation is received by a CPU before the ICIALLUIS has completed,
  1122. potentially leading to corrupted entries in the cache or TLB.
  1123. config PL310_ERRATA_753970
  1124. bool "PL310 errata: cache sync operation may be faulty"
  1125. depends on CACHE_PL310
  1126. help
  1127. This option enables the workaround for the 753970 PL310 (r3p0) erratum.
  1128. Under some condition the effect of cache sync operation on
  1129. the store buffer still remains when the operation completes.
  1130. This means that the store buffer is always asked to drain and
  1131. this prevents it from merging any further writes. The workaround
  1132. is to replace the normal offset of cache sync operation (0x730)
  1133. by another offset targeting an unmapped PL310 register 0x740.
  1134. This has the same effect as the cache sync operation: store buffer
  1135. drain and waiting for all buffers empty.
  1136. config ARM_ERRATA_754322
  1137. bool "ARM errata: possible faulty MMU translations following an ASID switch"
  1138. depends on CPU_V7
  1139. help
  1140. This option enables the workaround for the 754322 Cortex-A9 (r2p*,
  1141. r3p*) erratum. A speculative memory access may cause a page table walk
  1142. which starts prior to an ASID switch but completes afterwards. This
  1143. can populate the micro-TLB with a stale entry which may be hit with
  1144. the new ASID. This workaround places two dsb instructions in the mm
  1145. switching code so that no page table walks can cross the ASID switch.
  1146. config ARM_ERRATA_754327
  1147. bool "ARM errata: no automatic Store Buffer drain"
  1148. depends on CPU_V7 && SMP
  1149. help
  1150. This option enables the workaround for the 754327 Cortex-A9 (prior to
  1151. r2p0) erratum. The Store Buffer does not have any automatic draining
  1152. mechanism and therefore a livelock may occur if an external agent
  1153. continuously polls a memory location waiting to observe an update.
  1154. This workaround defines cpu_relax() as smp_mb(), preventing correctly
  1155. written polling loops from denying visibility of updates to memory.
  1156. config ARM_ERRATA_364296
  1157. bool "ARM errata: Possible cache data corruption with hit-under-miss enabled"
  1158. depends on CPU_V6 && !SMP
  1159. help
  1160. This options enables the workaround for the 364296 ARM1136
  1161. r0p2 erratum (possible cache data corruption with
  1162. hit-under-miss enabled). It sets the undocumented bit 31 in
  1163. the auxiliary control register and the FI bit in the control
  1164. register, thus disabling hit-under-miss without putting the
  1165. processor into full low interrupt latency mode. ARM11MPCore
  1166. is not affected.
  1167. config ARM_ERRATA_764369
  1168. bool "ARM errata: Data cache line maintenance operation by MVA may not succeed"
  1169. depends on CPU_V7 && SMP
  1170. help
  1171. This option enables the workaround for erratum 764369
  1172. affecting Cortex-A9 MPCore with two or more processors (all
  1173. current revisions). Under certain timing circumstances, a data
  1174. cache line maintenance operation by MVA targeting an Inner
  1175. Shareable memory region may fail to proceed up to either the
  1176. Point of Coherency or to the Point of Unification of the
  1177. system. This workaround adds a DSB instruction before the
  1178. relevant cache maintenance functions and sets a specific bit
  1179. in the diagnostic control register of the SCU.
  1180. config PL310_ERRATA_769419
  1181. bool "PL310 errata: no automatic Store Buffer drain"
  1182. depends on CACHE_L2X0
  1183. help
  1184. On revisions of the PL310 prior to r3p2, the Store Buffer does
  1185. not automatically drain. This can cause normal, non-cacheable
  1186. writes to be retained when the memory system is idle, leading
  1187. to suboptimal I/O performance for drivers using coherent DMA.
  1188. This option adds a write barrier to the cpu_idle loop so that,
  1189. on systems with an outer cache, the store buffer is drained
  1190. explicitly.
  1191. endmenu
  1192. source "arch/arm/common/Kconfig"
  1193. menu "Bus support"
  1194. config ARM_AMBA
  1195. bool
  1196. config ISA
  1197. bool
  1198. help
  1199. Find out whether you have ISA slots on your motherboard. ISA is the
  1200. name of a bus system, i.e. the way the CPU talks to the other stuff
  1201. inside your box. Other bus systems are PCI, EISA, MicroChannel
  1202. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  1203. newer boards don't support it. If you have ISA, say Y, otherwise N.
  1204. # Select ISA DMA controller support
  1205. config ISA_DMA
  1206. bool
  1207. select ISA_DMA_API
  1208. # Select ISA DMA interface
  1209. config ISA_DMA_API
  1210. bool
  1211. config PCI
  1212. bool "PCI support" if MIGHT_HAVE_PCI
  1213. help
  1214. Find out whether you have a PCI motherboard. PCI is the name of a
  1215. bus system, i.e. the way the CPU talks to the other stuff inside
  1216. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  1217. VESA. If you have PCI, say Y, otherwise N.
  1218. config PCI_DOMAINS
  1219. bool
  1220. depends on PCI
  1221. config PCI_NANOENGINE
  1222. bool "BSE nanoEngine PCI support"
  1223. depends on SA1100_NANOENGINE
  1224. help
  1225. Enable PCI on the BSE nanoEngine board.
  1226. config PCI_SYSCALL
  1227. def_bool PCI
  1228. # Select the host bridge type
  1229. config PCI_HOST_VIA82C505
  1230. bool
  1231. depends on PCI && ARCH_SHARK
  1232. default y
  1233. config PCI_HOST_ITE8152
  1234. bool
  1235. depends on PCI && MACH_ARMCORE
  1236. default y
  1237. select DMABOUNCE
  1238. source "drivers/pci/Kconfig"
  1239. source "drivers/pcmcia/Kconfig"
  1240. endmenu
  1241. menu "Kernel Features"
  1242. config HAVE_SMP
  1243. bool
  1244. help
  1245. This option should be selected by machines which have an SMP-
  1246. capable CPU.
  1247. The only effect of this option is to make the SMP-related
  1248. options available to the user for configuration.
  1249. config SMP
  1250. bool "Symmetric Multi-Processing"
  1251. depends on CPU_V6K || CPU_V7
  1252. depends on GENERIC_CLOCKEVENTS
  1253. depends on HAVE_SMP
  1254. depends on MMU
  1255. select USE_GENERIC_SMP_HELPERS
  1256. select HAVE_ARM_SCU if !ARCH_MSM_SCORPIONMP
  1257. help
  1258. This enables support for systems with more than one CPU. If you have
  1259. a system with only one CPU, like most personal computers, say N. If
  1260. you have a system with more than one CPU, say Y.
  1261. If you say N here, the kernel will run on single and multiprocessor
  1262. machines, but will use only one CPU of a multiprocessor machine. If
  1263. you say Y here, the kernel will run on many, but not all, single
  1264. processor machines. On a single processor machine, the kernel will
  1265. run faster if you say N here.
  1266. See also <file:Documentation/x86/i386/IO-APIC.txt>,
  1267. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  1268. <http://tldp.org/HOWTO/SMP-HOWTO.html>.
  1269. If you don't know what to do here, say N.
  1270. config SMP_ON_UP
  1271. bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
  1272. depends on EXPERIMENTAL
  1273. depends on SMP && !XIP_KERNEL
  1274. default y
  1275. help
  1276. SMP kernels contain instructions which fail on non-SMP processors.
  1277. Enabling this option allows the kernel to modify itself to make
  1278. these instructions safe. Disabling it allows about 1K of space
  1279. savings.
  1280. If you don't know what to do here, say Y.
  1281. config ARM_CPU_TOPOLOGY
  1282. bool "Support cpu topology definition"
  1283. depends on SMP && CPU_V7
  1284. default y
  1285. help
  1286. Support ARM cpu topology definition. The MPIDR register defines
  1287. affinity between processors which is then used to describe the cpu
  1288. topology of an ARM System.
  1289. config SCHED_MC
  1290. bool "Multi-core scheduler support"
  1291. depends on ARM_CPU_TOPOLOGY
  1292. help
  1293. Multi-core scheduler support improves the CPU scheduler's decision
  1294. making when dealing with multi-core CPU chips at a cost of slightly
  1295. increased overhead in some places. If unsure say N here.
  1296. config SCHED_SMT
  1297. bool "SMT scheduler support"
  1298. depends on ARM_CPU_TOPOLOGY
  1299. help
  1300. Improves the CPU scheduler's decision making when dealing with
  1301. MultiThreading at a cost of slightly increased overhead in some
  1302. places. If unsure say N here.
  1303. config HAVE_ARM_SCU
  1304. bool
  1305. help
  1306. This option enables support for the ARM system coherency unit
  1307. config ARM_ARCH_TIMER
  1308. bool "Architected timer support"
  1309. depends on CPU_V7
  1310. help
  1311. This option enables support for the ARM architected timer
  1312. config HAVE_ARM_TWD
  1313. bool
  1314. depends on SMP
  1315. help
  1316. This options enables support for the ARM timer and watchdog unit
  1317. choice
  1318. prompt "Memory split"
  1319. default VMSPLIT_3G
  1320. help
  1321. Select the desired split between kernel and user memory.
  1322. If you are not absolutely sure what you are doing, leave this
  1323. option alone!
  1324. config VMSPLIT_3G
  1325. bool "3G/1G user/kernel split"
  1326. config VMSPLIT_2G
  1327. bool "2G/2G user/kernel split"
  1328. config VMSPLIT_1G
  1329. bool "1G/3G user/kernel split"
  1330. endchoice
  1331. config PAGE_OFFSET
  1332. hex
  1333. default 0x40000000 if VMSPLIT_1G
  1334. default 0x80000000 if VMSPLIT_2G
  1335. default 0xC0000000
  1336. config NR_CPUS
  1337. int "Maximum number of CPUs (2-32)"
  1338. range 2 32
  1339. depends on SMP
  1340. default "4"
  1341. config HOTPLUG_CPU
  1342. bool "Support for hot-pluggable CPUs (EXPERIMENTAL)"
  1343. depends on SMP && HOTPLUG && EXPERIMENTAL
  1344. help
  1345. Say Y here to experiment with turning CPUs off and on. CPUs
  1346. can be controlled through /sys/devices/system/cpu.
  1347. config LOCAL_TIMERS
  1348. bool "Use local timer interrupts"
  1349. depends on SMP
  1350. default y
  1351. select HAVE_ARM_TWD if (!ARCH_MSM_SCORPIONMP && !EXYNOS4_MCT)
  1352. help
  1353. Enable support for local timers on SMP platforms, rather then the
  1354. legacy IPI broadcast method. Local timers allows the system
  1355. accounting to be spread across the timer interval, preventing a
  1356. "thundering herd" at every timer tick.
  1357. config ARCH_NR_GPIO
  1358. int
  1359. default 1024 if ARCH_SHMOBILE || ARCH_TEGRA
  1360. default 355 if ARCH_U8500
  1361. default 264 if MACH_H4700
  1362. default 0
  1363. help
  1364. Maximum number of GPIOs in the system.
  1365. If unsure, leave the default value.
  1366. source kernel/Kconfig.preempt
  1367. config HZ
  1368. int
  1369. default 200 if ARCH_EBSA110 || ARCH_S3C24XX || ARCH_S5P64X0 || \
  1370. ARCH_S5PV210 || ARCH_EXYNOS4
  1371. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  1372. default AT91_TIMER_HZ if ARCH_AT91
  1373. default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
  1374. default 100
  1375. config THUMB2_KERNEL
  1376. bool "Compile the kernel in Thumb-2 mode (EXPERIMENTAL)"
  1377. depends on CPU_V7 && !CPU_V6 && !CPU_V6K && EXPERIMENTAL
  1378. select AEABI
  1379. select ARM_ASM_UNIFIED
  1380. select ARM_UNWIND
  1381. help
  1382. By enabling this option, the kernel will be compiled in
  1383. Thumb-2 mode. A compiler/assembler that understand the unified
  1384. ARM-Thumb syntax is needed.
  1385. If unsure, say N.
  1386. config THUMB2_AVOID_R_ARM_THM_JUMP11
  1387. bool "Work around buggy Thumb-2 short branch relocations in gas"
  1388. depends on THUMB2_KERNEL && MODULES
  1389. default y
  1390. help
  1391. Various binutils versions can resolve Thumb-2 branches to
  1392. locally-defined, preemptible global symbols as short-range "b.n"
  1393. branch instructions.
  1394. This is a problem, because there's no guarantee the final
  1395. destination of the symbol, or any candidate locations for a
  1396. trampoline, are within range of the branch. For this reason, the
  1397. kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
  1398. relocation in modules at all, and it makes little sense to add
  1399. support.
  1400. The symptom is that the kernel fails with an "unsupported
  1401. relocation" error when loading some modules.
  1402. Until fixed tools are available, passing
  1403. -fno-optimize-sibling-calls to gcc should prevent gcc generating
  1404. code which hits this problem, at the cost of a bit of extra runtime
  1405. stack usage in some cases.
  1406. The problem is described in more detail at:
  1407. https://bugs.launchpad.net/binutils-linaro/+bug/725126
  1408. Only Thumb-2 kernels are affected.
  1409. Unless you are sure your tools don't have this problem, say Y.
  1410. config ARM_ASM_UNIFIED
  1411. bool
  1412. config AEABI
  1413. bool "Use the ARM EABI to compile the kernel"
  1414. help
  1415. This option allows for the kernel to be compiled using the latest
  1416. ARM ABI (aka EABI). This is only useful if you are using a user
  1417. space environment that is also compiled with EABI.
  1418. Since there are major incompatibilities between the legacy ABI and
  1419. EABI, especially with regard to structure member alignment, this
  1420. option also changes the kernel syscall calling convention to
  1421. disambiguate both ABIs and allow for backward compatibility support
  1422. (selected with CONFIG_OABI_COMPAT).
  1423. To use this you need GCC version 4.0.0 or later.
  1424. config OABI_COMPAT
  1425. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  1426. depends on AEABI && EXPERIMENTAL && !THUMB2_KERNEL
  1427. default y
  1428. help
  1429. This option preserves the old syscall interface along with the
  1430. new (ARM EABI) one. It also provides a compatibility layer to
  1431. intercept syscalls that have structure arguments which layout
  1432. in memory differs between the legacy ABI and the new ARM EABI
  1433. (only for non "thumb" binaries). This option adds a tiny
  1434. overhead to all syscalls and produces a slightly larger kernel.
  1435. If you know you'll be using only pure EABI user space then you
  1436. can say N here. If this option is not selected and you attempt
  1437. to execute a legacy ABI binary then the result will be
  1438. UNPREDICTABLE (in fact it can be predicted that it won't work
  1439. at all). If in doubt say Y.
  1440. config ARCH_HAS_HOLES_MEMORYMODEL
  1441. bool
  1442. config ARCH_SPARSEMEM_ENABLE
  1443. bool
  1444. config ARCH_SPARSEMEM_DEFAULT
  1445. def_bool ARCH_SPARSEMEM_ENABLE
  1446. config ARCH_SELECT_MEMORY_MODEL
  1447. def_bool ARCH_SPARSEMEM_ENABLE
  1448. config HAVE_ARCH_PFN_VALID
  1449. def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
  1450. config HIGHMEM
  1451. bool "High Memory Support"
  1452. depends on MMU
  1453. help
  1454. The address space of ARM processors is only 4 Gigabytes large
  1455. and it has to accommodate user address space, kernel address
  1456. space as well as some memory mapped IO. That means that, if you
  1457. have a large amount of physical memory and/or IO, not all of the
  1458. memory can be "permanently mapped" by the kernel. The physical
  1459. memory that is not permanently mapped is called "high memory".
  1460. Depending on the selected kernel/user memory split, minimum
  1461. vmalloc space and actual amount of RAM, you may not need this
  1462. option which should result in a slightly faster kernel.
  1463. If unsure, say n.
  1464. config HIGHPTE
  1465. bool "Allocate 2nd-level pagetables from highmem"
  1466. depends on HIGHMEM
  1467. config HW_PERF_EVENTS
  1468. bool "Enable hardware performance counter support for perf events"
  1469. depends on PERF_EVENTS && CPU_HAS_PMU
  1470. default y
  1471. help
  1472. Enable hardware performance counter support for perf events. If
  1473. disabled, perf events will use software events only.
  1474. source "mm/Kconfig"
  1475. config FORCE_MAX_ZONEORDER
  1476. int "Maximum zone order" if ARCH_SHMOBILE
  1477. range 11 64 if ARCH_SHMOBILE
  1478. default "9" if SA1111
  1479. default "11"
  1480. help
  1481. The kernel memory allocator divides physically contiguous memory
  1482. blocks into "zones", where each zone is a power of two number of
  1483. pages. This option selects the largest power of two that the kernel
  1484. keeps in the memory allocator. If you need to allocate very large
  1485. blocks of physically contiguous memory, then you may need to
  1486. increase this value.
  1487. This config option is actually maximum order plus one. For example,
  1488. a value of 11 means that the largest free memory block is 2^10 pages.
  1489. config LEDS
  1490. bool "Timer and CPU usage LEDs"
  1491. depends on ARCH_CDB89712 || ARCH_EBSA110 || \
  1492. ARCH_EBSA285 || ARCH_INTEGRATOR || \
  1493. ARCH_LUBBOCK || MACH_MAINSTONE || ARCH_NETWINDER || \
  1494. ARCH_OMAP || ARCH_P720T || ARCH_PXA_IDP || \
  1495. ARCH_SA1100 || ARCH_SHARK || ARCH_VERSATILE || \
  1496. ARCH_AT91 || ARCH_DAVINCI || \
  1497. ARCH_KS8695 || MACH_RD88F5182 || ARCH_REALVIEW
  1498. help
  1499. If you say Y here, the LEDs on your machine will be used
  1500. to provide useful information about your current system status.
  1501. If you are compiling a kernel for a NetWinder or EBSA-285, you will
  1502. be able to select which LEDs are active using the options below. If
  1503. you are compiling a kernel for the EBSA-110 or the LART however, the
  1504. red LED will simply flash regularly to indicate that the system is
  1505. still functional. It is safe to say Y here if you have a CATS
  1506. system, but the driver will do nothing.
  1507. config LEDS_TIMER
  1508. bool "Timer LED" if (!ARCH_CDB89712 && !ARCH_OMAP) || \
  1509. OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1510. || MACH_OMAP_PERSEUS2
  1511. depends on LEDS
  1512. depends on !GENERIC_CLOCKEVENTS
  1513. default y if ARCH_EBSA110
  1514. help
  1515. If you say Y here, one of the system LEDs (the green one on the
  1516. NetWinder, the amber one on the EBSA285, or the red one on the LART)
  1517. will flash regularly to indicate that the system is still
  1518. operational. This is mainly useful to kernel hackers who are
  1519. debugging unstable kernels.
  1520. The LART uses the same LED for both Timer LED and CPU usage LED
  1521. functions. You may choose to use both, but the Timer LED function
  1522. will overrule the CPU usage LED.
  1523. config LEDS_CPU
  1524. bool "CPU usage LED" if (!ARCH_CDB89712 && !ARCH_EBSA110 && \
  1525. !ARCH_OMAP) \
  1526. || OMAP_OSK_MISTRAL || MACH_OMAP_H2 \
  1527. || MACH_OMAP_PERSEUS2
  1528. depends on LEDS
  1529. help
  1530. If you say Y here, the red LED will be used to give a good real
  1531. time indication of CPU usage, by lighting whenever the idle task
  1532. is not currently executing.
  1533. The LART uses the same LED for both Timer LED and CPU usage LED
  1534. functions. You may choose to use both, but the Timer LED function
  1535. will overrule the CPU usage LED.
  1536. config ALIGNMENT_TRAP
  1537. bool
  1538. depends on CPU_CP15_MMU
  1539. default y if !ARCH_EBSA110
  1540. select HAVE_PROC_CPU if PROC_FS
  1541. help
  1542. ARM processors cannot fetch/store information which is not
  1543. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  1544. address divisible by 4. On 32-bit ARM processors, these non-aligned
  1545. fetch/store instructions will be emulated in software if you say
  1546. here, which has a severe performance impact. This is necessary for
  1547. correct operation of some network protocols. With an IP-only
  1548. configuration it is safe to say N, otherwise say Y.
  1549. config UACCESS_WITH_MEMCPY
  1550. bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user() (EXPERIMENTAL)"
  1551. depends on MMU && EXPERIMENTAL
  1552. default y if CPU_FEROCEON
  1553. help
  1554. Implement faster copy_to_user and clear_user methods for CPU
  1555. cores where a 8-word STM instruction give significantly higher
  1556. memory write throughput than a sequence of individual 32bit stores.
  1557. A possible side effect is a slight increase in scheduling latency
  1558. between threads sharing the same address space if they invoke
  1559. such copy operations with large buffers.
  1560. However, if the CPU data cache is using a write-allocate mode,
  1561. this option is unlikely to provide any performance gain.
  1562. config SECCOMP
  1563. bool
  1564. prompt "Enable seccomp to safely compute untrusted bytecode"
  1565. ---help---
  1566. This kernel feature is useful for number crunching applications
  1567. that may need to compute untrusted bytecode during their
  1568. execution. By using pipes or other transports made available to
  1569. the process as file descriptors supporting the read/write
  1570. syscalls, it's possible to isolate those applications in
  1571. their own address space using seccomp. Once seccomp is
  1572. enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
  1573. and the task is only allowed to execute a few safe syscalls
  1574. defined by each seccomp mode.
  1575. config CC_STACKPROTECTOR
  1576. bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
  1577. depends on EXPERIMENTAL
  1578. help
  1579. This option turns on the -fstack-protector GCC feature. This
  1580. feature puts, at the beginning of functions, a canary value on
  1581. the stack just before the return address, and validates
  1582. the value just before actually returning. Stack based buffer
  1583. overflows (that need to overwrite this return address) now also
  1584. overwrite the canary, which gets detected and the attack is then
  1585. neutralized via a kernel panic.
  1586. This feature requires gcc version 4.2 or above.
  1587. config DEPRECATED_PARAM_STRUCT
  1588. bool "Provide old way to pass kernel parameters"
  1589. help
  1590. This was deprecated in 2001 and announced to live on for 5 years.
  1591. Some old boot loaders still use this way.
  1592. endmenu
  1593. menu "Boot options"
  1594. config USE_OF
  1595. bool "Flattened Device Tree support"
  1596. select OF
  1597. select OF_EARLY_FLATTREE
  1598. select IRQ_DOMAIN
  1599. help
  1600. Include support for flattened device tree machine descriptions.
  1601. # Compressed boot loader in ROM. Yes, we really want to ask about
  1602. # TEXT and BSS so we preserve their values in the config files.
  1603. config ZBOOT_ROM_TEXT
  1604. hex "Compressed ROM boot loader base address"
  1605. default "0"
  1606. help
  1607. The physical address at which the ROM-able zImage is to be
  1608. placed in the target. Platforms which normally make use of
  1609. ROM-able zImage formats normally set this to a suitable
  1610. value in their defconfig file.
  1611. If ZBOOT_ROM is not enabled, this has no effect.
  1612. config ZBOOT_ROM_BSS
  1613. hex "Compressed ROM boot loader BSS address"
  1614. default "0"
  1615. help
  1616. The base address of an area of read/write memory in the target
  1617. for the ROM-able zImage which must be available while the
  1618. decompressor is running. It must be large enough to hold the
  1619. entire decompressed kernel plus an additional 128 KiB.
  1620. Platforms which normally make use of ROM-able zImage formats
  1621. normally set this to a suitable value in their defconfig file.
  1622. If ZBOOT_ROM is not enabled, this has no effect.
  1623. config ZBOOT_ROM
  1624. bool "Compressed boot loader in ROM/flash"
  1625. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  1626. help
  1627. Say Y here if you intend to execute your compressed kernel image
  1628. (zImage) directly from ROM or flash. If unsure, say N.
  1629. choice
  1630. prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)"
  1631. depends on ZBOOT_ROM && ARCH_SH7372 && EXPERIMENTAL
  1632. default ZBOOT_ROM_NONE
  1633. help
  1634. Include experimental SD/MMC loading code in the ROM-able zImage.
  1635. With this enabled it is possible to write the ROM-able zImage
  1636. kernel image to an MMC or SD card and boot the kernel straight
  1637. from the reset vector. At reset the processor Mask ROM will load
  1638. the first part of the ROM-able zImage which in turn loads the
  1639. rest the kernel image to RAM.
  1640. config ZBOOT_ROM_NONE
  1641. bool "No SD/MMC loader in zImage (EXPERIMENTAL)"
  1642. help
  1643. Do not load image from SD or MMC
  1644. config ZBOOT_ROM_MMCIF
  1645. bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
  1646. help
  1647. Load image from MMCIF hardware block.
  1648. config ZBOOT_ROM_SH_MOBILE_SDHI
  1649. bool "Include SuperH Mobile SDHI loader in zImage (EXPERIMENTAL)"
  1650. help
  1651. Load image from SDHI hardware block
  1652. endchoice
  1653. config ARM_APPENDED_DTB
  1654. bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
  1655. depends on OF && !ZBOOT_ROM && EXPERIMENTAL
  1656. help
  1657. With this option, the boot code will look for a device tree binary
  1658. (DTB) appended to zImage
  1659. (e.g. cat zImage <filename>.dtb > zImage_w_dtb).
  1660. This is meant as a backward compatibility convenience for those
  1661. systems with a bootloader that can't be upgraded to accommodate
  1662. the documented boot protocol using a device tree.
  1663. Beware that there is very little in terms of protection against
  1664. this option being confused by leftover garbage in memory that might
  1665. look like a DTB header after a reboot if no actual DTB is appended
  1666. to zImage. Do not leave this option active in a production kernel
  1667. if you don't intend to always append a DTB. Proper passing of the
  1668. location into r2 of a bootloader provided DTB is always preferable
  1669. to this option.
  1670. config ARM_ATAG_DTB_COMPAT
  1671. bool "Supplement the appended DTB with traditional ATAG information"
  1672. depends on ARM_APPENDED_DTB
  1673. help
  1674. Some old bootloaders can't be updated to a DTB capable one, yet
  1675. they provide ATAGs with memory configuration, the ramdisk address,
  1676. the kernel cmdline string, etc. Such information is dynamically
  1677. provided by the bootloader and can't always be stored in a static
  1678. DTB. To allow a device tree enabled kernel to be used with such
  1679. bootloaders, this option allows zImage to extract the information
  1680. from the ATAG list and store it at run time into the appended DTB.
  1681. config CMDLINE
  1682. string "Default kernel command string"
  1683. default ""
  1684. help
  1685. On some architectures (EBSA110 and CATS), there is currently no way
  1686. for the boot loader to pass arguments to the kernel. For these
  1687. architectures, you should supply some command-line options at build
  1688. time by entering them here. As a minimum, you should specify the
  1689. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  1690. choice
  1691. prompt "Kernel command line type" if CMDLINE != ""
  1692. default CMDLINE_FROM_BOOTLOADER
  1693. config CMDLINE_FROM_BOOTLOADER
  1694. bool "Use bootloader kernel arguments if available"
  1695. help
  1696. Uses the command-line options passed by the boot loader. If
  1697. the boot loader doesn't provide any, the default kernel command
  1698. string provided in CMDLINE will be used.
  1699. config CMDLINE_EXTEND
  1700. bool "Extend bootloader kernel arguments"
  1701. help
  1702. The command-line arguments provided by the boot loader will be
  1703. appended to the default kernel command string.
  1704. config CMDLINE_FORCE
  1705. bool "Always use the default kernel command string"
  1706. help
  1707. Always use the default kernel command string, even if the boot
  1708. loader passes other arguments to the kernel.
  1709. This is useful if you cannot or don't want to change the
  1710. command-line options your boot loader passes to the kernel.
  1711. endchoice
  1712. config XIP_KERNEL
  1713. bool "Kernel Execute-In-Place from ROM"
  1714. depends on !ZBOOT_ROM && !ARM_LPAE
  1715. help
  1716. Execute-In-Place allows the kernel to run from non-volatile storage
  1717. directly addressable by the CPU, such as NOR flash. This saves RAM
  1718. space since the text section of the kernel is not loaded from flash
  1719. to RAM. Read-write sections, such as the data section and stack,
  1720. are still copied to RAM. The XIP kernel is not compressed since
  1721. it has to run directly from flash, so it will take more space to
  1722. store it. The flash address used to link the kernel object files,
  1723. and for storing it, is configuration dependent. Therefore, if you
  1724. say Y here, you must know the proper physical address where to
  1725. store the kernel image depending on your own flash memory usage.
  1726. Also note that the make target becomes "make xipImage" rather than
  1727. "make zImage" or "make Image". The final kernel binary to put in
  1728. ROM memory will be arch/arm/boot/xipImage.
  1729. If unsure, say N.
  1730. config XIP_PHYS_ADDR
  1731. hex "XIP Kernel Physical Location"
  1732. depends on XIP_KERNEL
  1733. default "0x00080000"
  1734. help
  1735. This is the physical address in your flash memory the kernel will
  1736. be linked for and stored to. This address is dependent on your
  1737. own flash usage.
  1738. config KEXEC
  1739. bool "Kexec system call (EXPERIMENTAL)"
  1740. depends on EXPERIMENTAL && (!SMP || HOTPLUG_CPU)
  1741. help
  1742. kexec is a system call that implements the ability to shutdown your
  1743. current kernel, and to start another kernel. It is like a reboot
  1744. but it is independent of the system firmware. And like a reboot
  1745. you can start any kernel with it, not just Linux.
  1746. It is an ongoing process to be certain the hardware in a machine
  1747. is properly shutdown, so do not be surprised if this code does not
  1748. initially work for you. It may help to enable device hotplugging
  1749. support.
  1750. config ATAGS_PROC
  1751. bool "Export atags in procfs"
  1752. depends on KEXEC
  1753. default y
  1754. help
  1755. Should the atags used to boot the kernel be exported in an "atags"
  1756. file in procfs. Useful with kexec.
  1757. config CRASH_DUMP
  1758. bool "Build kdump crash kernel (EXPERIMENTAL)"
  1759. depends on EXPERIMENTAL
  1760. help
  1761. Generate crash dump after being started by kexec. This should
  1762. be normally only set in special crash dump kernels which are
  1763. loaded in the main kernel with kexec-tools into a specially
  1764. reserved region and then later executed after a crash by
  1765. kdump/kexec. The crash dump kernel must be compiled to a
  1766. memory address not used by the main kernel
  1767. For more details see Documentation/kdump/kdump.txt
  1768. config AUTO_ZRELADDR
  1769. bool "Auto calculation of the decompressed kernel image address"
  1770. depends on !ZBOOT_ROM && !ARCH_U300
  1771. help
  1772. ZRELADDR is the physical address where the decompressed kernel
  1773. image will be placed. If AUTO_ZRELADDR is selected, the address
  1774. will be determined at run-time by masking the current IP with
  1775. 0xf8000000. This assumes the zImage being placed in the first 128MB
  1776. from start of memory.
  1777. endmenu
  1778. menu "CPU Power Management"
  1779. if ARCH_HAS_CPUFREQ
  1780. source "drivers/cpufreq/Kconfig"
  1781. config CPU_FREQ_IMX
  1782. tristate "CPUfreq driver for i.MX CPUs"
  1783. depends on ARCH_MXC && CPU_FREQ
  1784. help
  1785. This enables the CPUfreq driver for i.MX CPUs.
  1786. config CPU_FREQ_SA1100
  1787. bool
  1788. config CPU_FREQ_SA1110
  1789. bool
  1790. config CPU_FREQ_INTEGRATOR
  1791. tristate "CPUfreq driver for ARM Integrator CPUs"
  1792. depends on ARCH_INTEGRATOR && CPU_FREQ
  1793. default y
  1794. help
  1795. This enables the CPUfreq driver for ARM Integrator CPUs.
  1796. For details, take a look at <file:Documentation/cpu-freq>.
  1797. If in doubt, say Y.
  1798. config CPU_FREQ_PXA
  1799. bool
  1800. depends on CPU_FREQ && ARCH_PXA && PXA25x
  1801. default y
  1802. select CPU_FREQ_TABLE
  1803. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  1804. config CPU_FREQ_S3C
  1805. bool
  1806. help
  1807. Internal configuration node for common cpufreq on Samsung SoC
  1808. config CPU_FREQ_S3C24XX
  1809. bool "CPUfreq driver for Samsung S3C24XX series CPUs (EXPERIMENTAL)"
  1810. depends on ARCH_S3C24XX && CPU_FREQ && EXPERIMENTAL
  1811. select CPU_FREQ_S3C
  1812. help
  1813. This enables the CPUfreq driver for the Samsung S3C24XX family
  1814. of CPUs.
  1815. For details, take a look at <file:Documentation/cpu-freq>.
  1816. If in doubt, say N.
  1817. config CPU_FREQ_S3C24XX_PLL
  1818. bool "Support CPUfreq changing of PLL frequency (EXPERIMENTAL)"
  1819. depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
  1820. help
  1821. Compile in support for changing the PLL frequency from the
  1822. S3C24XX series CPUfreq driver. The PLL takes time to settle
  1823. after a frequency change, so by default it is not enabled.
  1824. This also means that the PLL tables for the selected CPU(s) will
  1825. be built which may increase the size of the kernel image.
  1826. config CPU_FREQ_S3C24XX_DEBUG
  1827. bool "Debug CPUfreq Samsung driver core"
  1828. depends on CPU_FREQ_S3C24XX
  1829. help
  1830. Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
  1831. config CPU_FREQ_S3C24XX_IODEBUG
  1832. bool "Debug CPUfreq Samsung driver IO timing"
  1833. depends on CPU_FREQ_S3C24XX
  1834. help
  1835. Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
  1836. config CPU_FREQ_S3C24XX_DEBUGFS
  1837. bool "Export debugfs for CPUFreq"
  1838. depends on CPU_FREQ_S3C24XX && DEBUG_FS
  1839. help
  1840. Export status information via debugfs.
  1841. endif
  1842. source "drivers/cpuidle/Kconfig"
  1843. endmenu
  1844. menu "Floating point emulation"
  1845. comment "At least one emulation must be selected"
  1846. config FPE_NWFPE
  1847. bool "NWFPE math emulation"
  1848. depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
  1849. ---help---
  1850. Say Y to include the NWFPE floating point emulator in the kernel.
  1851. This is necessary to run most binaries. Linux does not currently
  1852. support floating point hardware so you need to say Y here even if
  1853. your machine has an FPA or floating point co-processor podule.
  1854. You may say N here if you are going to load the Acorn FPEmulator
  1855. early in the bootup.
  1856. config FPE_NWFPE_XP
  1857. bool "Support extended precision"
  1858. depends on FPE_NWFPE
  1859. help
  1860. Say Y to include 80-bit support in the kernel floating-point
  1861. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  1862. Note that gcc does not generate 80-bit operations by default,
  1863. so in most cases this option only enlarges the size of the
  1864. floating point emulator without any good reason.
  1865. You almost surely want to say N here.
  1866. config FPE_FASTFPE
  1867. bool "FastFPE math emulation (EXPERIMENTAL)"
  1868. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  1869. ---help---
  1870. Say Y here to include the FAST floating point emulator in the kernel.
  1871. This is an experimental much faster emulator which now also has full
  1872. precision for the mantissa. It does not support any exceptions.
  1873. It is very simple, and approximately 3-6 times faster than NWFPE.
  1874. It should be sufficient for most programs. It may be not suitable
  1875. for scientific calculations, but you have to check this for yourself.
  1876. If you do not feel you need a faster FP emulation you should better
  1877. choose NWFPE.
  1878. config VFP
  1879. bool "VFP-format floating point maths"
  1880. depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  1881. help
  1882. Say Y to include VFP support code in the kernel. This is needed
  1883. if your hardware includes a VFP unit.
  1884. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  1885. release notes and additional status information.
  1886. Say N if your target does not have VFP hardware.
  1887. config VFPv3
  1888. bool
  1889. depends on VFP
  1890. default y if CPU_V7
  1891. config NEON
  1892. bool "Advanced SIMD (NEON) Extension support"
  1893. depends on VFPv3 && CPU_V7
  1894. help
  1895. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  1896. Extension.
  1897. endmenu
  1898. menu "Userspace binary formats"
  1899. source "fs/Kconfig.binfmt"
  1900. config ARTHUR
  1901. tristate "RISC OS personality"
  1902. depends on !AEABI
  1903. help
  1904. Say Y here to include the kernel code necessary if you want to run
  1905. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  1906. experimental; if this sounds frightening, say N and sleep in peace.
  1907. You can also say M here to compile this support as a module (which
  1908. will be called arthur).
  1909. endmenu
  1910. menu "Power management options"
  1911. source "kernel/power/Kconfig"
  1912. config ARCH_SUSPEND_POSSIBLE
  1913. depends on !ARCH_S5PC100 && !ARCH_TEGRA
  1914. depends on CPU_ARM920T || CPU_ARM926T || CPU_SA1100 || \
  1915. CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE || CPU_MOHAWK
  1916. def_bool y
  1917. config ARM_CPU_SUSPEND
  1918. def_bool PM_SLEEP
  1919. endmenu
  1920. source "net/Kconfig"
  1921. source "drivers/Kconfig"
  1922. source "fs/Kconfig"
  1923. source "arch/arm/Kconfig.debug"
  1924. source "security/Kconfig"
  1925. source "crypto/Kconfig"
  1926. source "lib/Kconfig"