Kconfig 65 KB

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  1. config ARM
  2. bool
  3. default y
  4. select ARCH_BINFMT_ELF_RANDOMIZE_PIE
  5. select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
  6. select ARCH_HAVE_CUSTOM_GPIO_H
  7. select ARCH_WANT_IPC_PARSE_VERSION
  8. select BUILDTIME_EXTABLE_SORT if MMU
  9. select CPU_PM if (SUSPEND || CPU_IDLE)
  10. select DCACHE_WORD_ACCESS if (CPU_V6 || CPU_V6K || CPU_V7) && !CPU_BIG_ENDIAN && MMU
  11. select GENERIC_ATOMIC64 if (CPU_V6 || !CPU_32v6K || !AEABI)
  12. select GENERIC_CLOCKEVENTS_BROADCAST if SMP
  13. select GENERIC_IRQ_PROBE
  14. select GENERIC_IRQ_SHOW
  15. select GENERIC_PCI_IOMAP
  16. select GENERIC_SMP_IDLE_THREAD
  17. select GENERIC_STRNCPY_FROM_USER
  18. select GENERIC_STRNLEN_USER
  19. select HARDIRQS_SW_RESEND
  20. select HAVE_AOUT
  21. select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL
  22. select HAVE_ARCH_KGDB
  23. select HAVE_ARCH_SECCOMP_FILTER
  24. select HAVE_ARCH_TRACEHOOK
  25. select HAVE_BPF_JIT
  26. select HAVE_C_RECORDMCOUNT
  27. select HAVE_DEBUG_KMEMLEAK
  28. select HAVE_DMA_API_DEBUG
  29. select HAVE_DMA_ATTRS
  30. select HAVE_DMA_CONTIGUOUS if MMU
  31. select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL)
  32. select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
  33. select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL)
  34. select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
  35. select HAVE_GENERIC_DMA_COHERENT
  36. select HAVE_GENERIC_HARDIRQS
  37. select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7))
  38. select HAVE_IDE if PCI || ISA || PCMCIA
  39. select HAVE_IRQ_WORK
  40. select HAVE_KERNEL_GZIP
  41. select HAVE_KERNEL_LZMA
  42. select HAVE_KERNEL_LZO
  43. select HAVE_KERNEL_XZ
  44. select HAVE_KPROBES if !XIP_KERNEL
  45. select HAVE_KRETPROBES if (HAVE_KPROBES)
  46. select HAVE_MEMBLOCK
  47. select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
  48. select HAVE_PERF_EVENTS
  49. select HAVE_REGS_AND_STACK_ACCESS_API
  50. select HAVE_SYSCALL_TRACEPOINTS
  51. select HAVE_UID16
  52. select KTIME_SCALAR
  53. select PERF_USE_VMALLOC
  54. select RTC_LIB
  55. select SYS_SUPPORTS_APM_EMULATION
  56. select HAVE_MOD_ARCH_SPECIFIC if ARM_UNWIND
  57. select MODULES_USE_ELF_REL
  58. select CLONE_BACKWARDS
  59. help
  60. The ARM series is a line of low-power-consumption RISC chip designs
  61. licensed by ARM Ltd and targeted at embedded applications and
  62. handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
  63. manufactured, but legacy ARM-based PC hardware remains popular in
  64. Europe. There is an ARM Linux project with a web page at
  65. <http://www.arm.linux.org.uk/>.
  66. config ARM_HAS_SG_CHAIN
  67. bool
  68. config NEED_SG_DMA_LENGTH
  69. bool
  70. config ARM_DMA_USE_IOMMU
  71. bool
  72. select ARM_HAS_SG_CHAIN
  73. select NEED_SG_DMA_LENGTH
  74. config HAVE_PWM
  75. bool
  76. config MIGHT_HAVE_PCI
  77. bool
  78. config SYS_SUPPORTS_APM_EMULATION
  79. bool
  80. config GENERIC_GPIO
  81. bool
  82. config HAVE_TCM
  83. bool
  84. select GENERIC_ALLOCATOR
  85. config HAVE_PROC_CPU
  86. bool
  87. config NO_IOPORT
  88. bool
  89. config EISA
  90. bool
  91. ---help---
  92. The Extended Industry Standard Architecture (EISA) bus was
  93. developed as an open alternative to the IBM MicroChannel bus.
  94. The EISA bus provided some of the features of the IBM MicroChannel
  95. bus while maintaining backward compatibility with cards made for
  96. the older ISA bus. The EISA bus saw limited use between 1988 and
  97. 1995 when it was made obsolete by the PCI bus.
  98. Say Y here if you are building a kernel for an EISA-based machine.
  99. Otherwise, say N.
  100. config SBUS
  101. bool
  102. config STACKTRACE_SUPPORT
  103. bool
  104. default y
  105. config HAVE_LATENCYTOP_SUPPORT
  106. bool
  107. depends on !SMP
  108. default y
  109. config LOCKDEP_SUPPORT
  110. bool
  111. default y
  112. config TRACE_IRQFLAGS_SUPPORT
  113. bool
  114. default y
  115. config RWSEM_GENERIC_SPINLOCK
  116. bool
  117. default y
  118. config RWSEM_XCHGADD_ALGORITHM
  119. bool
  120. config ARCH_HAS_ILOG2_U32
  121. bool
  122. config ARCH_HAS_ILOG2_U64
  123. bool
  124. config ARCH_HAS_CPUFREQ
  125. bool
  126. help
  127. Internal node to signify that the ARCH has CPUFREQ support
  128. and that the relevant menu configurations are displayed for
  129. it.
  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_GPIO_H
  174. bool
  175. help
  176. Select this when mach/gpio.h is required to provide special
  177. definitions for this platform. The need for mach/gpio.h should
  178. be avoided when possible.
  179. config NEED_MACH_IO_H
  180. bool
  181. help
  182. Select this when mach/io.h is required to provide special
  183. definitions for this platform. The need for mach/io.h should
  184. be avoided when possible.
  185. config NEED_MACH_MEMORY_H
  186. bool
  187. help
  188. Select this when mach/memory.h is required to provide special
  189. definitions for this platform. The need for mach/memory.h should
  190. be avoided when possible.
  191. config PHYS_OFFSET
  192. hex "Physical address of main memory" if MMU
  193. depends on !ARM_PATCH_PHYS_VIRT && !NEED_MACH_MEMORY_H
  194. default DRAM_BASE if !MMU
  195. help
  196. Please provide the physical address corresponding to the
  197. location of main memory in your system.
  198. config GENERIC_BUG
  199. def_bool y
  200. depends on BUG
  201. source "init/Kconfig"
  202. source "kernel/Kconfig.freezer"
  203. menu "System Type"
  204. config MMU
  205. bool "MMU-based Paged Memory Management Support"
  206. default y
  207. help
  208. Select if you want MMU-based virtualised addressing space
  209. support by paged memory management. If unsure, say 'Y'.
  210. #
  211. # The "ARM system type" choice list is ordered alphabetically by option
  212. # text. Please add new entries in the option alphabetic order.
  213. #
  214. choice
  215. prompt "ARM system type"
  216. default ARCH_MULTIPLATFORM
  217. config ARCH_MULTIPLATFORM
  218. bool "Allow multiple platforms to be selected"
  219. depends on MMU
  220. select ARM_PATCH_PHYS_VIRT
  221. select AUTO_ZRELADDR
  222. select COMMON_CLK
  223. select MULTI_IRQ_HANDLER
  224. select SPARSE_IRQ
  225. select USE_OF
  226. config ARCH_INTEGRATOR
  227. bool "ARM Ltd. Integrator family"
  228. select ARCH_HAS_CPUFREQ
  229. select ARM_AMBA
  230. select COMMON_CLK
  231. select COMMON_CLK_VERSATILE
  232. select GENERIC_CLOCKEVENTS
  233. select HAVE_TCM
  234. select ICST
  235. select MULTI_IRQ_HANDLER
  236. select NEED_MACH_MEMORY_H
  237. select PLAT_VERSATILE
  238. select SPARSE_IRQ
  239. select VERSATILE_FPGA_IRQ
  240. help
  241. Support for ARM's Integrator platform.
  242. config ARCH_REALVIEW
  243. bool "ARM Ltd. RealView family"
  244. select ARCH_WANT_OPTIONAL_GPIOLIB
  245. select ARM_AMBA
  246. select ARM_TIMER_SP804
  247. select COMMON_CLK
  248. select COMMON_CLK_VERSATILE
  249. select GENERIC_CLOCKEVENTS
  250. select GPIO_PL061 if GPIOLIB
  251. select ICST
  252. select NEED_MACH_MEMORY_H
  253. select PLAT_VERSATILE
  254. select PLAT_VERSATILE_CLCD
  255. help
  256. This enables support for ARM Ltd RealView boards.
  257. config ARCH_VERSATILE
  258. bool "ARM Ltd. Versatile family"
  259. select ARCH_WANT_OPTIONAL_GPIOLIB
  260. select ARM_AMBA
  261. select ARM_TIMER_SP804
  262. select ARM_VIC
  263. select CLKDEV_LOOKUP
  264. select GENERIC_CLOCKEVENTS
  265. select HAVE_MACH_CLKDEV
  266. select ICST
  267. select PLAT_VERSATILE
  268. select PLAT_VERSATILE_CLCD
  269. select PLAT_VERSATILE_CLOCK
  270. select VERSATILE_FPGA_IRQ
  271. help
  272. This enables support for ARM Ltd Versatile board.
  273. config ARCH_AT91
  274. bool "Atmel AT91"
  275. select ARCH_REQUIRE_GPIOLIB
  276. select CLKDEV_LOOKUP
  277. select HAVE_CLK
  278. select IRQ_DOMAIN
  279. select NEED_MACH_GPIO_H
  280. select NEED_MACH_IO_H if PCCARD
  281. select PINCTRL
  282. select PINCTRL_AT91 if USE_OF
  283. help
  284. This enables support for systems based on Atmel
  285. AT91RM9200 and AT91SAM9* processors.
  286. config ARCH_BCM2835
  287. bool "Broadcom BCM2835 family"
  288. select ARCH_REQUIRE_GPIOLIB
  289. select ARM_AMBA
  290. select ARM_ERRATA_411920
  291. select ARM_TIMER_SP804
  292. select CLKDEV_LOOKUP
  293. select COMMON_CLK
  294. select CPU_V6
  295. select GENERIC_CLOCKEVENTS
  296. select GENERIC_GPIO
  297. select MULTI_IRQ_HANDLER
  298. select PINCTRL
  299. select PINCTRL_BCM2835
  300. select SPARSE_IRQ
  301. select USE_OF
  302. help
  303. This enables support for the Broadcom BCM2835 SoC. This SoC is
  304. use in the Raspberry Pi, and Roku 2 devices.
  305. config ARCH_CNS3XXX
  306. bool "Cavium Networks CNS3XXX family"
  307. select ARM_GIC
  308. select CPU_V6K
  309. select GENERIC_CLOCKEVENTS
  310. select MIGHT_HAVE_CACHE_L2X0
  311. select MIGHT_HAVE_PCI
  312. select PCI_DOMAINS if PCI
  313. help
  314. Support for Cavium Networks CNS3XXX platform.
  315. config ARCH_CLPS711X
  316. bool "Cirrus Logic CLPS711x/EP721x/EP731x-based"
  317. select ARCH_REQUIRE_GPIOLIB
  318. select ARCH_USES_GETTIMEOFFSET
  319. select AUTO_ZRELADDR
  320. select CLKDEV_LOOKUP
  321. select COMMON_CLK
  322. select CPU_ARM720T
  323. select GENERIC_CLOCKEVENTS
  324. select MULTI_IRQ_HANDLER
  325. select NEED_MACH_MEMORY_H
  326. select SPARSE_IRQ
  327. help
  328. Support for Cirrus Logic 711x/721x/731x based boards.
  329. config ARCH_GEMINI
  330. bool "Cortina Systems Gemini"
  331. select ARCH_REQUIRE_GPIOLIB
  332. select ARCH_USES_GETTIMEOFFSET
  333. select CPU_FA526
  334. help
  335. Support for the Cortina Systems Gemini family SoCs
  336. config ARCH_SIRF
  337. bool "CSR SiRF"
  338. select ARCH_REQUIRE_GPIOLIB
  339. select COMMON_CLK
  340. select GENERIC_CLOCKEVENTS
  341. select GENERIC_IRQ_CHIP
  342. select MIGHT_HAVE_CACHE_L2X0
  343. select NO_IOPORT
  344. select PINCTRL
  345. select PINCTRL_SIRF
  346. select USE_OF
  347. help
  348. Support for CSR SiRFprimaII/Marco/Polo platforms
  349. config ARCH_EBSA110
  350. bool "EBSA-110"
  351. select ARCH_USES_GETTIMEOFFSET
  352. select CPU_SA110
  353. select ISA
  354. select NEED_MACH_IO_H
  355. select NEED_MACH_MEMORY_H
  356. select NO_IOPORT
  357. help
  358. This is an evaluation board for the StrongARM processor available
  359. from Digital. It has limited hardware on-board, including an
  360. Ethernet interface, two PCMCIA sockets, two serial ports and a
  361. parallel port.
  362. config ARCH_EP93XX
  363. bool "EP93xx-based"
  364. select ARCH_HAS_HOLES_MEMORYMODEL
  365. select ARCH_REQUIRE_GPIOLIB
  366. select ARCH_USES_GETTIMEOFFSET
  367. select ARM_AMBA
  368. select ARM_VIC
  369. select CLKDEV_LOOKUP
  370. select CPU_ARM920T
  371. select NEED_MACH_MEMORY_H
  372. help
  373. This enables support for the Cirrus EP93xx series of CPUs.
  374. config ARCH_FOOTBRIDGE
  375. bool "FootBridge"
  376. select CPU_SA110
  377. select FOOTBRIDGE
  378. select GENERIC_CLOCKEVENTS
  379. select HAVE_IDE
  380. select NEED_MACH_IO_H if !MMU
  381. select NEED_MACH_MEMORY_H
  382. help
  383. Support for systems based on the DC21285 companion chip
  384. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  385. config ARCH_MXS
  386. bool "Freescale MXS-based"
  387. select ARCH_REQUIRE_GPIOLIB
  388. select CLKDEV_LOOKUP
  389. select CLKSRC_MMIO
  390. select COMMON_CLK
  391. select GENERIC_CLOCKEVENTS
  392. select HAVE_CLK_PREPARE
  393. select MULTI_IRQ_HANDLER
  394. select PINCTRL
  395. select SPARSE_IRQ
  396. select USE_OF
  397. help
  398. Support for Freescale MXS-based family of processors
  399. config ARCH_NETX
  400. bool "Hilscher NetX based"
  401. select ARM_VIC
  402. select CLKSRC_MMIO
  403. select CPU_ARM926T
  404. select GENERIC_CLOCKEVENTS
  405. help
  406. This enables support for systems based on the Hilscher NetX Soc
  407. config ARCH_H720X
  408. bool "Hynix HMS720x-based"
  409. select ARCH_USES_GETTIMEOFFSET
  410. select CPU_ARM720T
  411. select ISA_DMA_API
  412. help
  413. This enables support for systems based on the Hynix HMS720x
  414. config ARCH_IOP13XX
  415. bool "IOP13xx-based"
  416. depends on MMU
  417. select ARCH_SUPPORTS_MSI
  418. select CPU_XSC3
  419. select NEED_MACH_MEMORY_H
  420. select NEED_RET_TO_USER
  421. select PCI
  422. select PLAT_IOP
  423. select VMSPLIT_1G
  424. help
  425. Support for Intel's IOP13XX (XScale) family of processors.
  426. config ARCH_IOP32X
  427. bool "IOP32x-based"
  428. depends on MMU
  429. select ARCH_REQUIRE_GPIOLIB
  430. select CPU_XSCALE
  431. select NEED_MACH_GPIO_H
  432. select NEED_RET_TO_USER
  433. select PCI
  434. select PLAT_IOP
  435. help
  436. Support for Intel's 80219 and IOP32X (XScale) family of
  437. processors.
  438. config ARCH_IOP33X
  439. bool "IOP33x-based"
  440. depends on MMU
  441. select ARCH_REQUIRE_GPIOLIB
  442. select CPU_XSCALE
  443. select NEED_MACH_GPIO_H
  444. select NEED_RET_TO_USER
  445. select PCI
  446. select PLAT_IOP
  447. help
  448. Support for Intel's IOP33X (XScale) family of processors.
  449. config ARCH_IXP4XX
  450. bool "IXP4xx-based"
  451. depends on MMU
  452. select ARCH_HAS_DMA_SET_COHERENT_MASK
  453. select ARCH_REQUIRE_GPIOLIB
  454. select CLKSRC_MMIO
  455. select CPU_XSCALE
  456. select DMABOUNCE if PCI
  457. select GENERIC_CLOCKEVENTS
  458. select MIGHT_HAVE_PCI
  459. select NEED_MACH_IO_H
  460. help
  461. Support for Intel's IXP4XX (XScale) family of processors.
  462. config ARCH_DOVE
  463. bool "Marvell Dove"
  464. select ARCH_REQUIRE_GPIOLIB
  465. select COMMON_CLK_DOVE
  466. select CPU_V7
  467. select GENERIC_CLOCKEVENTS
  468. select MIGHT_HAVE_PCI
  469. select PINCTRL
  470. select PINCTRL_DOVE
  471. select PLAT_ORION_LEGACY
  472. select USB_ARCH_HAS_EHCI
  473. help
  474. Support for the Marvell Dove SoC 88AP510
  475. config ARCH_KIRKWOOD
  476. bool "Marvell Kirkwood"
  477. select ARCH_REQUIRE_GPIOLIB
  478. select CPU_FEROCEON
  479. select GENERIC_CLOCKEVENTS
  480. select PCI
  481. select PCI_QUIRKS
  482. select PINCTRL
  483. select PINCTRL_KIRKWOOD
  484. select PLAT_ORION_LEGACY
  485. help
  486. Support for the following Marvell Kirkwood series SoCs:
  487. 88F6180, 88F6192 and 88F6281.
  488. config ARCH_MV78XX0
  489. bool "Marvell MV78xx0"
  490. select ARCH_REQUIRE_GPIOLIB
  491. select CPU_FEROCEON
  492. select GENERIC_CLOCKEVENTS
  493. select PCI
  494. select PLAT_ORION_LEGACY
  495. help
  496. Support for the following Marvell MV78xx0 series SoCs:
  497. MV781x0, MV782x0.
  498. config ARCH_ORION5X
  499. bool "Marvell Orion"
  500. depends on MMU
  501. select ARCH_REQUIRE_GPIOLIB
  502. select CPU_FEROCEON
  503. select GENERIC_CLOCKEVENTS
  504. select PCI
  505. select PLAT_ORION_LEGACY
  506. help
  507. Support for the following Marvell Orion 5x series SoCs:
  508. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  509. Orion-2 (5281), Orion-1-90 (6183).
  510. config ARCH_MMP
  511. bool "Marvell PXA168/910/MMP2"
  512. depends on MMU
  513. select ARCH_REQUIRE_GPIOLIB
  514. select CLKDEV_LOOKUP
  515. select GENERIC_ALLOCATOR
  516. select GENERIC_CLOCKEVENTS
  517. select GPIO_PXA
  518. select IRQ_DOMAIN
  519. select NEED_MACH_GPIO_H
  520. select PINCTRL
  521. select PLAT_PXA
  522. select SPARSE_IRQ
  523. help
  524. Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
  525. config ARCH_KS8695
  526. bool "Micrel/Kendin KS8695"
  527. select ARCH_REQUIRE_GPIOLIB
  528. select CLKSRC_MMIO
  529. select CPU_ARM922T
  530. select GENERIC_CLOCKEVENTS
  531. select NEED_MACH_MEMORY_H
  532. help
  533. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  534. System-on-Chip devices.
  535. config ARCH_W90X900
  536. bool "Nuvoton W90X900 CPU"
  537. select ARCH_REQUIRE_GPIOLIB
  538. select CLKDEV_LOOKUP
  539. select CLKSRC_MMIO
  540. select CPU_ARM926T
  541. select GENERIC_CLOCKEVENTS
  542. help
  543. Support for Nuvoton (Winbond logic dept.) ARM9 processor,
  544. At present, the w90x900 has been renamed nuc900, regarding
  545. the ARM series product line, you can login the following
  546. link address to know more.
  547. <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
  548. ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
  549. config ARCH_LPC32XX
  550. bool "NXP LPC32XX"
  551. select ARCH_REQUIRE_GPIOLIB
  552. select ARM_AMBA
  553. select CLKDEV_LOOKUP
  554. select CLKSRC_MMIO
  555. select CPU_ARM926T
  556. select GENERIC_CLOCKEVENTS
  557. select HAVE_IDE
  558. select HAVE_PWM
  559. select USB_ARCH_HAS_OHCI
  560. select USE_OF
  561. help
  562. Support for the NXP LPC32XX family of processors
  563. config ARCH_TEGRA
  564. bool "NVIDIA Tegra"
  565. select ARCH_HAS_CPUFREQ
  566. select CLKDEV_LOOKUP
  567. select CLKSRC_MMIO
  568. select COMMON_CLK
  569. select GENERIC_CLOCKEVENTS
  570. select GENERIC_GPIO
  571. select HAVE_CLK
  572. select HAVE_SMP
  573. select MIGHT_HAVE_CACHE_L2X0
  574. select SPARSE_IRQ
  575. select USE_OF
  576. help
  577. This enables support for NVIDIA Tegra based systems (Tegra APX,
  578. Tegra 6xx and Tegra 2 series).
  579. config ARCH_PXA
  580. bool "PXA2xx/PXA3xx-based"
  581. depends on MMU
  582. select ARCH_HAS_CPUFREQ
  583. select ARCH_MTD_XIP
  584. select ARCH_REQUIRE_GPIOLIB
  585. select ARM_CPU_SUSPEND if PM
  586. select AUTO_ZRELADDR
  587. select CLKDEV_LOOKUP
  588. select CLKSRC_MMIO
  589. select GENERIC_CLOCKEVENTS
  590. select GPIO_PXA
  591. select HAVE_IDE
  592. select MULTI_IRQ_HANDLER
  593. select NEED_MACH_GPIO_H
  594. select PLAT_PXA
  595. select SPARSE_IRQ
  596. help
  597. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  598. config ARCH_MSM
  599. bool "Qualcomm MSM"
  600. select ARCH_REQUIRE_GPIOLIB
  601. select CLKDEV_LOOKUP
  602. select GENERIC_CLOCKEVENTS
  603. select HAVE_CLK
  604. help
  605. Support for Qualcomm MSM/QSD based systems. This runs on the
  606. apps processor of the MSM/QSD and depends on a shared memory
  607. interface to the modem processor which runs the baseband
  608. stack and controls some vital subsystems
  609. (clock and power control, etc).
  610. config ARCH_SHMOBILE
  611. bool "Renesas SH-Mobile / R-Mobile"
  612. select CLKDEV_LOOKUP
  613. select GENERIC_CLOCKEVENTS
  614. select HAVE_CLK
  615. select HAVE_MACH_CLKDEV
  616. select HAVE_SMP
  617. select MIGHT_HAVE_CACHE_L2X0
  618. select MULTI_IRQ_HANDLER
  619. select NEED_MACH_MEMORY_H
  620. select NO_IOPORT
  621. select PM_GENERIC_DOMAINS if PM
  622. select SPARSE_IRQ
  623. help
  624. Support for Renesas's SH-Mobile and R-Mobile ARM platforms.
  625. config ARCH_RPC
  626. bool "RiscPC"
  627. select ARCH_ACORN
  628. select ARCH_MAY_HAVE_PC_FDC
  629. select ARCH_SPARSEMEM_ENABLE
  630. select ARCH_USES_GETTIMEOFFSET
  631. select FIQ
  632. select HAVE_IDE
  633. select HAVE_PATA_PLATFORM
  634. select ISA_DMA_API
  635. select NEED_MACH_IO_H
  636. select NEED_MACH_MEMORY_H
  637. select NO_IOPORT
  638. help
  639. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  640. CD-ROM interface, serial and parallel port, and the floppy drive.
  641. config ARCH_SA1100
  642. bool "SA1100-based"
  643. select ARCH_HAS_CPUFREQ
  644. select ARCH_MTD_XIP
  645. select ARCH_REQUIRE_GPIOLIB
  646. select ARCH_SPARSEMEM_ENABLE
  647. select CLKDEV_LOOKUP
  648. select CLKSRC_MMIO
  649. select CPU_FREQ
  650. select CPU_SA1100
  651. select GENERIC_CLOCKEVENTS
  652. select HAVE_IDE
  653. select ISA
  654. select NEED_MACH_GPIO_H
  655. select NEED_MACH_MEMORY_H
  656. select SPARSE_IRQ
  657. help
  658. Support for StrongARM 11x0 based boards.
  659. config ARCH_S3C24XX
  660. bool "Samsung S3C24XX SoCs"
  661. select ARCH_HAS_CPUFREQ
  662. select ARCH_USES_GETTIMEOFFSET
  663. select CLKDEV_LOOKUP
  664. select GENERIC_GPIO
  665. select HAVE_CLK
  666. select HAVE_S3C2410_I2C if I2C
  667. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  668. select HAVE_S3C_RTC if RTC_CLASS
  669. select NEED_MACH_GPIO_H
  670. select NEED_MACH_IO_H
  671. help
  672. Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443
  673. and S3C2450 SoCs based systems, such as the Simtec Electronics BAST
  674. (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or the
  675. Samsung SMDK2410 development board (and derivatives).
  676. config ARCH_S3C64XX
  677. bool "Samsung S3C64XX"
  678. select ARCH_HAS_CPUFREQ
  679. select ARCH_REQUIRE_GPIOLIB
  680. select ARCH_USES_GETTIMEOFFSET
  681. select ARM_VIC
  682. select CLKDEV_LOOKUP
  683. select CPU_V6
  684. select HAVE_CLK
  685. select HAVE_S3C2410_I2C if I2C
  686. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  687. select HAVE_TCM
  688. select NEED_MACH_GPIO_H
  689. select NO_IOPORT
  690. select PLAT_SAMSUNG
  691. select S3C_DEV_NAND
  692. select S3C_GPIO_TRACK
  693. select SAMSUNG_CLKSRC
  694. select SAMSUNG_GPIOLIB_4BIT
  695. select SAMSUNG_IRQ_VIC_TIMER
  696. select USB_ARCH_HAS_OHCI
  697. help
  698. Samsung S3C64XX series based systems
  699. config ARCH_S5P64X0
  700. bool "Samsung S5P6440 S5P6450"
  701. select CLKDEV_LOOKUP
  702. select CLKSRC_MMIO
  703. select CPU_V6
  704. select GENERIC_CLOCKEVENTS
  705. select GENERIC_GPIO
  706. select HAVE_CLK
  707. select HAVE_S3C2410_I2C if I2C
  708. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  709. select HAVE_S3C_RTC if RTC_CLASS
  710. select NEED_MACH_GPIO_H
  711. help
  712. Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
  713. SMDK6450.
  714. config ARCH_S5PC100
  715. bool "Samsung S5PC100"
  716. select ARCH_USES_GETTIMEOFFSET
  717. select CLKDEV_LOOKUP
  718. select CPU_V7
  719. select GENERIC_GPIO
  720. select HAVE_CLK
  721. select HAVE_S3C2410_I2C if I2C
  722. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  723. select HAVE_S3C_RTC if RTC_CLASS
  724. select NEED_MACH_GPIO_H
  725. help
  726. Samsung S5PC100 series based systems
  727. config ARCH_S5PV210
  728. bool "Samsung S5PV210/S5PC110"
  729. select ARCH_HAS_CPUFREQ
  730. select ARCH_HAS_HOLES_MEMORYMODEL
  731. select ARCH_SPARSEMEM_ENABLE
  732. select CLKDEV_LOOKUP
  733. select CLKSRC_MMIO
  734. select CPU_V7
  735. select GENERIC_CLOCKEVENTS
  736. select GENERIC_GPIO
  737. select HAVE_CLK
  738. select HAVE_S3C2410_I2C if I2C
  739. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  740. select HAVE_S3C_RTC if RTC_CLASS
  741. select NEED_MACH_GPIO_H
  742. select NEED_MACH_MEMORY_H
  743. help
  744. Samsung S5PV210/S5PC110 series based systems
  745. config ARCH_EXYNOS
  746. bool "Samsung EXYNOS"
  747. select ARCH_HAS_CPUFREQ
  748. select ARCH_HAS_HOLES_MEMORYMODEL
  749. select ARCH_SPARSEMEM_ENABLE
  750. select CLKDEV_LOOKUP
  751. select CPU_V7
  752. select GENERIC_CLOCKEVENTS
  753. select GENERIC_GPIO
  754. select HAVE_CLK
  755. select HAVE_S3C2410_I2C if I2C
  756. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  757. select HAVE_S3C_RTC if RTC_CLASS
  758. select NEED_MACH_GPIO_H
  759. select NEED_MACH_MEMORY_H
  760. help
  761. Support for SAMSUNG's EXYNOS SoCs (EXYNOS4/5)
  762. config ARCH_SHARK
  763. bool "Shark"
  764. select ARCH_USES_GETTIMEOFFSET
  765. select CPU_SA110
  766. select ISA
  767. select ISA_DMA
  768. select NEED_MACH_MEMORY_H
  769. select PCI
  770. select ZONE_DMA
  771. help
  772. Support for the StrongARM based Digital DNARD machine, also known
  773. as "Shark" (<http://www.shark-linux.de/shark.html>).
  774. config ARCH_U300
  775. bool "ST-Ericsson U300 Series"
  776. depends on MMU
  777. select ARCH_REQUIRE_GPIOLIB
  778. select ARM_AMBA
  779. select ARM_PATCH_PHYS_VIRT
  780. select ARM_VIC
  781. select CLKDEV_LOOKUP
  782. select CLKSRC_MMIO
  783. select COMMON_CLK
  784. select CPU_ARM926T
  785. select GENERIC_CLOCKEVENTS
  786. select GENERIC_GPIO
  787. select HAVE_TCM
  788. select SPARSE_IRQ
  789. help
  790. Support for ST-Ericsson U300 series mobile platforms.
  791. config ARCH_U8500
  792. bool "ST-Ericsson U8500 Series"
  793. depends on MMU
  794. select ARCH_HAS_CPUFREQ
  795. select ARCH_REQUIRE_GPIOLIB
  796. select ARM_AMBA
  797. select CLKDEV_LOOKUP
  798. select CPU_V7
  799. select GENERIC_CLOCKEVENTS
  800. select HAVE_SMP
  801. select MIGHT_HAVE_CACHE_L2X0
  802. select SPARSE_IRQ
  803. help
  804. Support for ST-Ericsson's Ux500 architecture
  805. config ARCH_NOMADIK
  806. bool "STMicroelectronics Nomadik"
  807. select ARCH_REQUIRE_GPIOLIB
  808. select ARM_AMBA
  809. select ARM_VIC
  810. select COMMON_CLK
  811. select CPU_ARM926T
  812. select GENERIC_CLOCKEVENTS
  813. select MIGHT_HAVE_CACHE_L2X0
  814. select PINCTRL
  815. select PINCTRL_STN8815
  816. select SPARSE_IRQ
  817. help
  818. Support for the Nomadik platform by ST-Ericsson
  819. config PLAT_SPEAR
  820. bool "ST SPEAr"
  821. select ARCH_HAS_CPUFREQ
  822. select ARCH_REQUIRE_GPIOLIB
  823. select ARM_AMBA
  824. select CLKDEV_LOOKUP
  825. select CLKSRC_MMIO
  826. select COMMON_CLK
  827. select GENERIC_CLOCKEVENTS
  828. select HAVE_CLK
  829. help
  830. Support for ST's SPEAr platform (SPEAr3xx, SPEAr6xx and SPEAr13xx).
  831. config ARCH_DAVINCI
  832. bool "TI DaVinci"
  833. select ARCH_HAS_HOLES_MEMORYMODEL
  834. select ARCH_REQUIRE_GPIOLIB
  835. select CLKDEV_LOOKUP
  836. select GENERIC_ALLOCATOR
  837. select GENERIC_CLOCKEVENTS
  838. select GENERIC_IRQ_CHIP
  839. select HAVE_IDE
  840. select NEED_MACH_GPIO_H
  841. select USE_OF
  842. select ZONE_DMA
  843. help
  844. Support for TI's DaVinci platform.
  845. config ARCH_OMAP
  846. bool "TI OMAP"
  847. depends on MMU
  848. select ARCH_HAS_CPUFREQ
  849. select ARCH_HAS_HOLES_MEMORYMODEL
  850. select ARCH_REQUIRE_GPIOLIB
  851. select CLKSRC_MMIO
  852. select GENERIC_CLOCKEVENTS
  853. select HAVE_CLK
  854. help
  855. Support for TI's OMAP platform (OMAP1/2/3/4).
  856. config ARCH_VT8500_SINGLE
  857. bool "VIA/WonderMedia 85xx"
  858. select ARCH_HAS_CPUFREQ
  859. select ARCH_REQUIRE_GPIOLIB
  860. select CLKDEV_LOOKUP
  861. select COMMON_CLK
  862. select CPU_ARM926T
  863. select GENERIC_CLOCKEVENTS
  864. select GENERIC_GPIO
  865. select HAVE_CLK
  866. select MULTI_IRQ_HANDLER
  867. select SPARSE_IRQ
  868. select USE_OF
  869. help
  870. Support for VIA/WonderMedia VT8500/WM85xx System-on-Chip.
  871. endchoice
  872. menu "Multiple platform selection"
  873. depends on ARCH_MULTIPLATFORM
  874. comment "CPU Core family selection"
  875. config ARCH_MULTI_V4
  876. bool "ARMv4 based platforms (FA526, StrongARM)"
  877. depends on !ARCH_MULTI_V6_V7
  878. select ARCH_MULTI_V4_V5
  879. config ARCH_MULTI_V4T
  880. bool "ARMv4T based platforms (ARM720T, ARM920T, ...)"
  881. depends on !ARCH_MULTI_V6_V7
  882. select ARCH_MULTI_V4_V5
  883. config ARCH_MULTI_V5
  884. bool "ARMv5 based platforms (ARM926T, XSCALE, PJ1, ...)"
  885. depends on !ARCH_MULTI_V6_V7
  886. select ARCH_MULTI_V4_V5
  887. config ARCH_MULTI_V4_V5
  888. bool
  889. config ARCH_MULTI_V6
  890. bool "ARMv6 based platforms (ARM11, Scorpion, ...)"
  891. select ARCH_MULTI_V6_V7
  892. select CPU_V6
  893. config ARCH_MULTI_V7
  894. bool "ARMv7 based platforms (Cortex-A, PJ4, Krait)"
  895. default y
  896. select ARCH_MULTI_V6_V7
  897. select ARCH_VEXPRESS
  898. select CPU_V7
  899. config ARCH_MULTI_V6_V7
  900. bool
  901. config ARCH_MULTI_CPU_AUTO
  902. def_bool !(ARCH_MULTI_V4 || ARCH_MULTI_V4T || ARCH_MULTI_V6_V7)
  903. select ARCH_MULTI_V5
  904. endmenu
  905. #
  906. # This is sorted alphabetically by mach-* pathname. However, plat-*
  907. # Kconfigs may be included either alphabetically (according to the
  908. # plat- suffix) or along side the corresponding mach-* source.
  909. #
  910. source "arch/arm/mach-mvebu/Kconfig"
  911. source "arch/arm/mach-at91/Kconfig"
  912. source "arch/arm/mach-bcm/Kconfig"
  913. source "arch/arm/mach-clps711x/Kconfig"
  914. source "arch/arm/mach-cns3xxx/Kconfig"
  915. source "arch/arm/mach-davinci/Kconfig"
  916. source "arch/arm/mach-dove/Kconfig"
  917. source "arch/arm/mach-ep93xx/Kconfig"
  918. source "arch/arm/mach-footbridge/Kconfig"
  919. source "arch/arm/mach-gemini/Kconfig"
  920. source "arch/arm/mach-h720x/Kconfig"
  921. source "arch/arm/mach-highbank/Kconfig"
  922. source "arch/arm/mach-integrator/Kconfig"
  923. source "arch/arm/mach-iop32x/Kconfig"
  924. source "arch/arm/mach-iop33x/Kconfig"
  925. source "arch/arm/mach-iop13xx/Kconfig"
  926. source "arch/arm/mach-ixp4xx/Kconfig"
  927. source "arch/arm/mach-kirkwood/Kconfig"
  928. source "arch/arm/mach-ks8695/Kconfig"
  929. source "arch/arm/mach-msm/Kconfig"
  930. source "arch/arm/mach-mv78xx0/Kconfig"
  931. source "arch/arm/mach-imx/Kconfig"
  932. source "arch/arm/mach-mxs/Kconfig"
  933. source "arch/arm/mach-netx/Kconfig"
  934. source "arch/arm/mach-nomadik/Kconfig"
  935. source "arch/arm/plat-omap/Kconfig"
  936. source "arch/arm/mach-omap1/Kconfig"
  937. source "arch/arm/mach-omap2/Kconfig"
  938. source "arch/arm/mach-orion5x/Kconfig"
  939. source "arch/arm/mach-picoxcell/Kconfig"
  940. source "arch/arm/mach-pxa/Kconfig"
  941. source "arch/arm/plat-pxa/Kconfig"
  942. source "arch/arm/mach-mmp/Kconfig"
  943. source "arch/arm/mach-realview/Kconfig"
  944. source "arch/arm/mach-sa1100/Kconfig"
  945. source "arch/arm/plat-samsung/Kconfig"
  946. source "arch/arm/mach-socfpga/Kconfig"
  947. source "arch/arm/plat-spear/Kconfig"
  948. source "arch/arm/mach-s3c24xx/Kconfig"
  949. if ARCH_S3C64XX
  950. source "arch/arm/mach-s3c64xx/Kconfig"
  951. endif
  952. source "arch/arm/mach-s5p64x0/Kconfig"
  953. source "arch/arm/mach-s5pc100/Kconfig"
  954. source "arch/arm/mach-s5pv210/Kconfig"
  955. source "arch/arm/mach-exynos/Kconfig"
  956. source "arch/arm/mach-shmobile/Kconfig"
  957. source "arch/arm/mach-sunxi/Kconfig"
  958. source "arch/arm/mach-prima2/Kconfig"
  959. source "arch/arm/mach-tegra/Kconfig"
  960. source "arch/arm/mach-u300/Kconfig"
  961. source "arch/arm/mach-ux500/Kconfig"
  962. source "arch/arm/mach-versatile/Kconfig"
  963. source "arch/arm/mach-vexpress/Kconfig"
  964. source "arch/arm/plat-versatile/Kconfig"
  965. source "arch/arm/mach-vt8500/Kconfig"
  966. source "arch/arm/mach-w90x900/Kconfig"
  967. source "arch/arm/mach-zynq/Kconfig"
  968. # Definitions to make life easier
  969. config ARCH_ACORN
  970. bool
  971. config PLAT_IOP
  972. bool
  973. select GENERIC_CLOCKEVENTS
  974. config PLAT_ORION
  975. bool
  976. select CLKSRC_MMIO
  977. select COMMON_CLK
  978. select GENERIC_IRQ_CHIP
  979. select IRQ_DOMAIN
  980. config PLAT_ORION_LEGACY
  981. bool
  982. select PLAT_ORION
  983. config PLAT_PXA
  984. bool
  985. config PLAT_VERSATILE
  986. bool
  987. config ARM_TIMER_SP804
  988. bool
  989. select CLKSRC_MMIO
  990. select HAVE_SCHED_CLOCK
  991. source arch/arm/mm/Kconfig
  992. config ARM_NR_BANKS
  993. int
  994. default 16 if ARCH_EP93XX
  995. default 8
  996. config IWMMXT
  997. bool "Enable iWMMXt support"
  998. depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
  999. default y if PXA27x || PXA3xx || ARCH_MMP
  1000. help
  1001. Enable support for iWMMXt context switching at run time if
  1002. running on a CPU that supports it.
  1003. config XSCALE_PMU
  1004. bool
  1005. depends on CPU_XSCALE
  1006. default y
  1007. config MULTI_IRQ_HANDLER
  1008. bool
  1009. help
  1010. Allow each machine to specify it's own IRQ handler at run time.
  1011. if !MMU
  1012. source "arch/arm/Kconfig-nommu"
  1013. endif
  1014. config ARM_ERRATA_326103
  1015. bool "ARM errata: FSR write bit incorrect on a SWP to read-only memory"
  1016. depends on CPU_V6
  1017. help
  1018. Executing a SWP instruction to read-only memory does not set bit 11
  1019. of the FSR on the ARM 1136 prior to r1p0. This causes the kernel to
  1020. treat the access as a read, preventing a COW from occurring and
  1021. causing the faulting task to livelock.
  1022. config ARM_ERRATA_411920
  1023. bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
  1024. depends on CPU_V6 || CPU_V6K
  1025. help
  1026. Invalidation of the Instruction Cache operation can
  1027. fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
  1028. It does not affect the MPCore. This option enables the ARM Ltd.
  1029. recommended workaround.
  1030. config ARM_ERRATA_430973
  1031. bool "ARM errata: Stale prediction on replaced interworking branch"
  1032. depends on CPU_V7
  1033. help
  1034. This option enables the workaround for the 430973 Cortex-A8
  1035. (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
  1036. interworking branch is replaced with another code sequence at the
  1037. same virtual address, whether due to self-modifying code or virtual
  1038. to physical address re-mapping, Cortex-A8 does not recover from the
  1039. stale interworking branch prediction. This results in Cortex-A8
  1040. executing the new code sequence in the incorrect ARM or Thumb state.
  1041. The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
  1042. and also flushes the branch target cache at every context switch.
  1043. Note that setting specific bits in the ACTLR register may not be
  1044. available in non-secure mode.
  1045. config ARM_ERRATA_458693
  1046. bool "ARM errata: Processor deadlock when a false hazard is created"
  1047. depends on CPU_V7
  1048. help
  1049. This option enables the workaround for the 458693 Cortex-A8 (r2p0)
  1050. erratum. For very specific sequences of memory operations, it is
  1051. possible for a hazard condition intended for a cache line to instead
  1052. be incorrectly associated with a different cache line. This false
  1053. hazard might then cause a processor deadlock. The workaround enables
  1054. the L1 caching of the NEON accesses and disables the PLD instruction
  1055. in the ACTLR register. Note that setting specific bits in the ACTLR
  1056. register may not be available in non-secure mode.
  1057. config ARM_ERRATA_460075
  1058. bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
  1059. depends on CPU_V7
  1060. help
  1061. This option enables the workaround for the 460075 Cortex-A8 (r2p0)
  1062. erratum. Any asynchronous access to the L2 cache may encounter a
  1063. situation in which recent store transactions to the L2 cache are lost
  1064. and overwritten with stale memory contents from external memory. The
  1065. workaround disables the write-allocate mode for the L2 cache via the
  1066. ACTLR register. Note that setting specific bits in the ACTLR register
  1067. may not be available in non-secure mode.
  1068. config ARM_ERRATA_742230
  1069. bool "ARM errata: DMB operation may be faulty"
  1070. depends on CPU_V7 && SMP
  1071. help
  1072. This option enables the workaround for the 742230 Cortex-A9
  1073. (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
  1074. between two write operations may not ensure the correct visibility
  1075. ordering of the two writes. This workaround sets a specific bit in
  1076. the diagnostic register of the Cortex-A9 which causes the DMB
  1077. instruction to behave as a DSB, ensuring the correct behaviour of
  1078. the two writes.
  1079. config ARM_ERRATA_742231
  1080. bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
  1081. depends on CPU_V7 && SMP
  1082. help
  1083. This option enables the workaround for the 742231 Cortex-A9
  1084. (r2p0..r2p2) erratum. Under certain conditions, specific to the
  1085. Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
  1086. accessing some data located in the same cache line, may get corrupted
  1087. data due to bad handling of the address hazard when the line gets
  1088. replaced from one of the CPUs at the same time as another CPU is
  1089. accessing it. This workaround sets specific bits in the diagnostic
  1090. register of the Cortex-A9 which reduces the linefill issuing
  1091. capabilities of the processor.
  1092. config PL310_ERRATA_588369
  1093. bool "PL310 errata: Clean & Invalidate maintenance operations do not invalidate clean lines"
  1094. depends on CACHE_L2X0
  1095. help
  1096. The PL310 L2 cache controller implements three types of Clean &
  1097. Invalidate maintenance operations: by Physical Address
  1098. (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
  1099. They are architecturally defined to behave as the execution of a
  1100. clean operation followed immediately by an invalidate operation,
  1101. both performing to the same memory location. This functionality
  1102. is not correctly implemented in PL310 as clean lines are not
  1103. invalidated as a result of these operations.
  1104. config ARM_ERRATA_720789
  1105. bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
  1106. depends on CPU_V7
  1107. help
  1108. This option enables the workaround for the 720789 Cortex-A9 (prior to
  1109. r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
  1110. broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
  1111. As a consequence of this erratum, some TLB entries which should be
  1112. invalidated are not, resulting in an incoherency in the system page
  1113. tables. The workaround changes the TLB flushing routines to invalidate
  1114. entries regardless of the ASID.
  1115. config PL310_ERRATA_727915
  1116. bool "PL310 errata: Background Clean & Invalidate by Way operation can cause data corruption"
  1117. depends on CACHE_L2X0
  1118. help
  1119. PL310 implements the Clean & Invalidate by Way L2 cache maintenance
  1120. operation (offset 0x7FC). This operation runs in background so that
  1121. PL310 can handle normal accesses while it is in progress. Under very
  1122. rare circumstances, due to this erratum, write data can be lost when
  1123. PL310 treats a cacheable write transaction during a Clean &
  1124. Invalidate by Way operation.
  1125. config ARM_ERRATA_743622
  1126. bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
  1127. depends on CPU_V7
  1128. help
  1129. This option enables the workaround for the 743622 Cortex-A9
  1130. (r2p*) erratum. Under very rare conditions, a faulty
  1131. optimisation in the Cortex-A9 Store Buffer may lead to data
  1132. corruption. This workaround sets a specific bit in the diagnostic
  1133. register of the Cortex-A9 which disables the Store Buffer
  1134. optimisation, preventing the defect from occurring. This has no
  1135. visible impact on the overall performance or power consumption of the
  1136. processor.
  1137. config ARM_ERRATA_751472
  1138. bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
  1139. depends on CPU_V7
  1140. help
  1141. This option enables the workaround for the 751472 Cortex-A9 (prior
  1142. to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
  1143. completion of a following broadcasted operation if the second
  1144. operation is received by a CPU before the ICIALLUIS has completed,
  1145. potentially leading to corrupted entries in the cache or TLB.
  1146. config PL310_ERRATA_753970
  1147. bool "PL310 errata: cache sync operation may be faulty"
  1148. depends on CACHE_PL310
  1149. help
  1150. This option enables the workaround for the 753970 PL310 (r3p0) erratum.
  1151. Under some condition the effect of cache sync operation on
  1152. the store buffer still remains when the operation completes.
  1153. This means that the store buffer is always asked to drain and
  1154. this prevents it from merging any further writes. The workaround
  1155. is to replace the normal offset of cache sync operation (0x730)
  1156. by another offset targeting an unmapped PL310 register 0x740.
  1157. This has the same effect as the cache sync operation: store buffer
  1158. drain and waiting for all buffers empty.
  1159. config ARM_ERRATA_754322
  1160. bool "ARM errata: possible faulty MMU translations following an ASID switch"
  1161. depends on CPU_V7
  1162. help
  1163. This option enables the workaround for the 754322 Cortex-A9 (r2p*,
  1164. r3p*) erratum. A speculative memory access may cause a page table walk
  1165. which starts prior to an ASID switch but completes afterwards. This
  1166. can populate the micro-TLB with a stale entry which may be hit with
  1167. the new ASID. This workaround places two dsb instructions in the mm
  1168. switching code so that no page table walks can cross the ASID switch.
  1169. config ARM_ERRATA_754327
  1170. bool "ARM errata: no automatic Store Buffer drain"
  1171. depends on CPU_V7 && SMP
  1172. help
  1173. This option enables the workaround for the 754327 Cortex-A9 (prior to
  1174. r2p0) erratum. The Store Buffer does not have any automatic draining
  1175. mechanism and therefore a livelock may occur if an external agent
  1176. continuously polls a memory location waiting to observe an update.
  1177. This workaround defines cpu_relax() as smp_mb(), preventing correctly
  1178. written polling loops from denying visibility of updates to memory.
  1179. config ARM_ERRATA_364296
  1180. bool "ARM errata: Possible cache data corruption with hit-under-miss enabled"
  1181. depends on CPU_V6 && !SMP
  1182. help
  1183. This options enables the workaround for the 364296 ARM1136
  1184. r0p2 erratum (possible cache data corruption with
  1185. hit-under-miss enabled). It sets the undocumented bit 31 in
  1186. the auxiliary control register and the FI bit in the control
  1187. register, thus disabling hit-under-miss without putting the
  1188. processor into full low interrupt latency mode. ARM11MPCore
  1189. is not affected.
  1190. config ARM_ERRATA_764369
  1191. bool "ARM errata: Data cache line maintenance operation by MVA may not succeed"
  1192. depends on CPU_V7 && SMP
  1193. help
  1194. This option enables the workaround for erratum 764369
  1195. affecting Cortex-A9 MPCore with two or more processors (all
  1196. current revisions). Under certain timing circumstances, a data
  1197. cache line maintenance operation by MVA targeting an Inner
  1198. Shareable memory region may fail to proceed up to either the
  1199. Point of Coherency or to the Point of Unification of the
  1200. system. This workaround adds a DSB instruction before the
  1201. relevant cache maintenance functions and sets a specific bit
  1202. in the diagnostic control register of the SCU.
  1203. config PL310_ERRATA_769419
  1204. bool "PL310 errata: no automatic Store Buffer drain"
  1205. depends on CACHE_L2X0
  1206. help
  1207. On revisions of the PL310 prior to r3p2, the Store Buffer does
  1208. not automatically drain. This can cause normal, non-cacheable
  1209. writes to be retained when the memory system is idle, leading
  1210. to suboptimal I/O performance for drivers using coherent DMA.
  1211. This option adds a write barrier to the cpu_idle loop so that,
  1212. on systems with an outer cache, the store buffer is drained
  1213. explicitly.
  1214. config ARM_ERRATA_775420
  1215. bool "ARM errata: A data cache maintenance operation which aborts, might lead to deadlock"
  1216. depends on CPU_V7
  1217. help
  1218. This option enables the workaround for the 775420 Cortex-A9 (r2p2,
  1219. r2p6,r2p8,r2p10,r3p0) erratum. In case a date cache maintenance
  1220. operation aborts with MMU exception, it might cause the processor
  1221. to deadlock. This workaround puts DSB before executing ISB if
  1222. an abort may occur on cache maintenance.
  1223. endmenu
  1224. source "arch/arm/common/Kconfig"
  1225. menu "Bus support"
  1226. config ARM_AMBA
  1227. bool
  1228. config ISA
  1229. bool
  1230. help
  1231. Find out whether you have ISA slots on your motherboard. ISA is the
  1232. name of a bus system, i.e. the way the CPU talks to the other stuff
  1233. inside your box. Other bus systems are PCI, EISA, MicroChannel
  1234. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  1235. newer boards don't support it. If you have ISA, say Y, otherwise N.
  1236. # Select ISA DMA controller support
  1237. config ISA_DMA
  1238. bool
  1239. select ISA_DMA_API
  1240. # Select ISA DMA interface
  1241. config ISA_DMA_API
  1242. bool
  1243. config PCI
  1244. bool "PCI support" if MIGHT_HAVE_PCI
  1245. help
  1246. Find out whether you have a PCI motherboard. PCI is the name of a
  1247. bus system, i.e. the way the CPU talks to the other stuff inside
  1248. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  1249. VESA. If you have PCI, say Y, otherwise N.
  1250. config PCI_DOMAINS
  1251. bool
  1252. depends on PCI
  1253. config PCI_NANOENGINE
  1254. bool "BSE nanoEngine PCI support"
  1255. depends on SA1100_NANOENGINE
  1256. help
  1257. Enable PCI on the BSE nanoEngine board.
  1258. config PCI_SYSCALL
  1259. def_bool PCI
  1260. # Select the host bridge type
  1261. config PCI_HOST_VIA82C505
  1262. bool
  1263. depends on PCI && ARCH_SHARK
  1264. default y
  1265. config PCI_HOST_ITE8152
  1266. bool
  1267. depends on PCI && MACH_ARMCORE
  1268. default y
  1269. select DMABOUNCE
  1270. source "drivers/pci/Kconfig"
  1271. source "drivers/pcmcia/Kconfig"
  1272. endmenu
  1273. menu "Kernel Features"
  1274. config HAVE_SMP
  1275. bool
  1276. help
  1277. This option should be selected by machines which have an SMP-
  1278. capable CPU.
  1279. The only effect of this option is to make the SMP-related
  1280. options available to the user for configuration.
  1281. config SMP
  1282. bool "Symmetric Multi-Processing"
  1283. depends on CPU_V6K || CPU_V7
  1284. depends on GENERIC_CLOCKEVENTS
  1285. depends on HAVE_SMP
  1286. depends on MMU
  1287. select HAVE_ARM_SCU if !ARCH_MSM_SCORPIONMP
  1288. select USE_GENERIC_SMP_HELPERS
  1289. help
  1290. This enables support for systems with more than one CPU. If you have
  1291. a system with only one CPU, like most personal computers, say N. If
  1292. you have a system with more than one CPU, say Y.
  1293. If you say N here, the kernel will run on single and multiprocessor
  1294. machines, but will use only one CPU of a multiprocessor machine. If
  1295. you say Y here, the kernel will run on many, but not all, single
  1296. processor machines. On a single processor machine, the kernel will
  1297. run faster if you say N here.
  1298. See also <file:Documentation/x86/i386/IO-APIC.txt>,
  1299. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  1300. <http://tldp.org/HOWTO/SMP-HOWTO.html>.
  1301. If you don't know what to do here, say N.
  1302. config SMP_ON_UP
  1303. bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
  1304. depends on EXPERIMENTAL
  1305. depends on SMP && !XIP_KERNEL
  1306. default y
  1307. help
  1308. SMP kernels contain instructions which fail on non-SMP processors.
  1309. Enabling this option allows the kernel to modify itself to make
  1310. these instructions safe. Disabling it allows about 1K of space
  1311. savings.
  1312. If you don't know what to do here, say Y.
  1313. config ARM_CPU_TOPOLOGY
  1314. bool "Support cpu topology definition"
  1315. depends on SMP && CPU_V7
  1316. default y
  1317. help
  1318. Support ARM cpu topology definition. The MPIDR register defines
  1319. affinity between processors which is then used to describe the cpu
  1320. topology of an ARM System.
  1321. config SCHED_MC
  1322. bool "Multi-core scheduler support"
  1323. depends on ARM_CPU_TOPOLOGY
  1324. help
  1325. Multi-core scheduler support improves the CPU scheduler's decision
  1326. making when dealing with multi-core CPU chips at a cost of slightly
  1327. increased overhead in some places. If unsure say N here.
  1328. config SCHED_SMT
  1329. bool "SMT scheduler support"
  1330. depends on ARM_CPU_TOPOLOGY
  1331. help
  1332. Improves the CPU scheduler's decision making when dealing with
  1333. MultiThreading at a cost of slightly increased overhead in some
  1334. places. If unsure say N here.
  1335. config HAVE_ARM_SCU
  1336. bool
  1337. help
  1338. This option enables support for the ARM system coherency unit
  1339. config ARM_ARCH_TIMER
  1340. bool "Architected timer support"
  1341. depends on CPU_V7
  1342. help
  1343. This option enables support for the ARM architected timer
  1344. config HAVE_ARM_TWD
  1345. bool
  1346. depends on SMP
  1347. help
  1348. This options enables support for the ARM timer and watchdog unit
  1349. choice
  1350. prompt "Memory split"
  1351. default VMSPLIT_3G
  1352. help
  1353. Select the desired split between kernel and user memory.
  1354. If you are not absolutely sure what you are doing, leave this
  1355. option alone!
  1356. config VMSPLIT_3G
  1357. bool "3G/1G user/kernel split"
  1358. config VMSPLIT_2G
  1359. bool "2G/2G user/kernel split"
  1360. config VMSPLIT_1G
  1361. bool "1G/3G user/kernel split"
  1362. endchoice
  1363. config PAGE_OFFSET
  1364. hex
  1365. default 0x40000000 if VMSPLIT_1G
  1366. default 0x80000000 if VMSPLIT_2G
  1367. default 0xC0000000
  1368. config NR_CPUS
  1369. int "Maximum number of CPUs (2-32)"
  1370. range 2 32
  1371. depends on SMP
  1372. default "4"
  1373. config HOTPLUG_CPU
  1374. bool "Support for hot-pluggable CPUs"
  1375. depends on SMP && HOTPLUG
  1376. help
  1377. Say Y here to experiment with turning CPUs off and on. CPUs
  1378. can be controlled through /sys/devices/system/cpu.
  1379. config LOCAL_TIMERS
  1380. bool "Use local timer interrupts"
  1381. depends on SMP
  1382. default y
  1383. select HAVE_ARM_TWD if (!ARCH_MSM_SCORPIONMP && !EXYNOS4_MCT)
  1384. help
  1385. Enable support for local timers on SMP platforms, rather then the
  1386. legacy IPI broadcast method. Local timers allows the system
  1387. accounting to be spread across the timer interval, preventing a
  1388. "thundering herd" at every timer tick.
  1389. config ARCH_NR_GPIO
  1390. int
  1391. default 1024 if ARCH_SHMOBILE || ARCH_TEGRA
  1392. default 355 if ARCH_U8500
  1393. default 264 if MACH_H4700
  1394. default 512 if SOC_OMAP5
  1395. default 288 if ARCH_VT8500
  1396. default 0
  1397. help
  1398. Maximum number of GPIOs in the system.
  1399. If unsure, leave the default value.
  1400. source kernel/Kconfig.preempt
  1401. config HZ
  1402. int
  1403. default 200 if ARCH_EBSA110 || ARCH_S3C24XX || ARCH_S5P64X0 || \
  1404. ARCH_S5PV210 || ARCH_EXYNOS4
  1405. default OMAP_32K_TIMER_HZ if ARCH_OMAP && OMAP_32K_TIMER
  1406. default AT91_TIMER_HZ if ARCH_AT91
  1407. default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
  1408. default 100
  1409. config THUMB2_KERNEL
  1410. bool "Compile the kernel in Thumb-2 mode"
  1411. depends on CPU_V7 && !CPU_V6 && !CPU_V6K
  1412. select AEABI
  1413. select ARM_ASM_UNIFIED
  1414. select ARM_UNWIND
  1415. help
  1416. By enabling this option, the kernel will be compiled in
  1417. Thumb-2 mode. A compiler/assembler that understand the unified
  1418. ARM-Thumb syntax is needed.
  1419. If unsure, say N.
  1420. config THUMB2_AVOID_R_ARM_THM_JUMP11
  1421. bool "Work around buggy Thumb-2 short branch relocations in gas"
  1422. depends on THUMB2_KERNEL && MODULES
  1423. default y
  1424. help
  1425. Various binutils versions can resolve Thumb-2 branches to
  1426. locally-defined, preemptible global symbols as short-range "b.n"
  1427. branch instructions.
  1428. This is a problem, because there's no guarantee the final
  1429. destination of the symbol, or any candidate locations for a
  1430. trampoline, are within range of the branch. For this reason, the
  1431. kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
  1432. relocation in modules at all, and it makes little sense to add
  1433. support.
  1434. The symptom is that the kernel fails with an "unsupported
  1435. relocation" error when loading some modules.
  1436. Until fixed tools are available, passing
  1437. -fno-optimize-sibling-calls to gcc should prevent gcc generating
  1438. code which hits this problem, at the cost of a bit of extra runtime
  1439. stack usage in some cases.
  1440. The problem is described in more detail at:
  1441. https://bugs.launchpad.net/binutils-linaro/+bug/725126
  1442. Only Thumb-2 kernels are affected.
  1443. Unless you are sure your tools don't have this problem, say Y.
  1444. config ARM_ASM_UNIFIED
  1445. bool
  1446. config AEABI
  1447. bool "Use the ARM EABI to compile the kernel"
  1448. help
  1449. This option allows for the kernel to be compiled using the latest
  1450. ARM ABI (aka EABI). This is only useful if you are using a user
  1451. space environment that is also compiled with EABI.
  1452. Since there are major incompatibilities between the legacy ABI and
  1453. EABI, especially with regard to structure member alignment, this
  1454. option also changes the kernel syscall calling convention to
  1455. disambiguate both ABIs and allow for backward compatibility support
  1456. (selected with CONFIG_OABI_COMPAT).
  1457. To use this you need GCC version 4.0.0 or later.
  1458. config OABI_COMPAT
  1459. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  1460. depends on AEABI && EXPERIMENTAL && !THUMB2_KERNEL
  1461. default y
  1462. help
  1463. This option preserves the old syscall interface along with the
  1464. new (ARM EABI) one. It also provides a compatibility layer to
  1465. intercept syscalls that have structure arguments which layout
  1466. in memory differs between the legacy ABI and the new ARM EABI
  1467. (only for non "thumb" binaries). This option adds a tiny
  1468. overhead to all syscalls and produces a slightly larger kernel.
  1469. If you know you'll be using only pure EABI user space then you
  1470. can say N here. If this option is not selected and you attempt
  1471. to execute a legacy ABI binary then the result will be
  1472. UNPREDICTABLE (in fact it can be predicted that it won't work
  1473. at all). If in doubt say Y.
  1474. config ARCH_HAS_HOLES_MEMORYMODEL
  1475. bool
  1476. config ARCH_SPARSEMEM_ENABLE
  1477. bool
  1478. config ARCH_SPARSEMEM_DEFAULT
  1479. def_bool ARCH_SPARSEMEM_ENABLE
  1480. config ARCH_SELECT_MEMORY_MODEL
  1481. def_bool ARCH_SPARSEMEM_ENABLE
  1482. config HAVE_ARCH_PFN_VALID
  1483. def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
  1484. config HIGHMEM
  1485. bool "High Memory Support"
  1486. depends on MMU
  1487. help
  1488. The address space of ARM processors is only 4 Gigabytes large
  1489. and it has to accommodate user address space, kernel address
  1490. space as well as some memory mapped IO. That means that, if you
  1491. have a large amount of physical memory and/or IO, not all of the
  1492. memory can be "permanently mapped" by the kernel. The physical
  1493. memory that is not permanently mapped is called "high memory".
  1494. Depending on the selected kernel/user memory split, minimum
  1495. vmalloc space and actual amount of RAM, you may not need this
  1496. option which should result in a slightly faster kernel.
  1497. If unsure, say n.
  1498. config HIGHPTE
  1499. bool "Allocate 2nd-level pagetables from highmem"
  1500. depends on HIGHMEM
  1501. config HW_PERF_EVENTS
  1502. bool "Enable hardware performance counter support for perf events"
  1503. depends on PERF_EVENTS
  1504. default y
  1505. help
  1506. Enable hardware performance counter support for perf events. If
  1507. disabled, perf events will use software events only.
  1508. source "mm/Kconfig"
  1509. config FORCE_MAX_ZONEORDER
  1510. int "Maximum zone order" if ARCH_SHMOBILE
  1511. range 11 64 if ARCH_SHMOBILE
  1512. default "12" if SOC_AM33XX
  1513. default "9" if SA1111
  1514. default "11"
  1515. help
  1516. The kernel memory allocator divides physically contiguous memory
  1517. blocks into "zones", where each zone is a power of two number of
  1518. pages. This option selects the largest power of two that the kernel
  1519. keeps in the memory allocator. If you need to allocate very large
  1520. blocks of physically contiguous memory, then you may need to
  1521. increase this value.
  1522. This config option is actually maximum order plus one. For example,
  1523. a value of 11 means that the largest free memory block is 2^10 pages.
  1524. config ALIGNMENT_TRAP
  1525. bool
  1526. depends on CPU_CP15_MMU
  1527. default y if !ARCH_EBSA110
  1528. select HAVE_PROC_CPU if PROC_FS
  1529. help
  1530. ARM processors cannot fetch/store information which is not
  1531. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  1532. address divisible by 4. On 32-bit ARM processors, these non-aligned
  1533. fetch/store instructions will be emulated in software if you say
  1534. here, which has a severe performance impact. This is necessary for
  1535. correct operation of some network protocols. With an IP-only
  1536. configuration it is safe to say N, otherwise say Y.
  1537. config UACCESS_WITH_MEMCPY
  1538. bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user()"
  1539. depends on MMU
  1540. default y if CPU_FEROCEON
  1541. help
  1542. Implement faster copy_to_user and clear_user methods for CPU
  1543. cores where a 8-word STM instruction give significantly higher
  1544. memory write throughput than a sequence of individual 32bit stores.
  1545. A possible side effect is a slight increase in scheduling latency
  1546. between threads sharing the same address space if they invoke
  1547. such copy operations with large buffers.
  1548. However, if the CPU data cache is using a write-allocate mode,
  1549. this option is unlikely to provide any performance gain.
  1550. config SECCOMP
  1551. bool
  1552. prompt "Enable seccomp to safely compute untrusted bytecode"
  1553. ---help---
  1554. This kernel feature is useful for number crunching applications
  1555. that may need to compute untrusted bytecode during their
  1556. execution. By using pipes or other transports made available to
  1557. the process as file descriptors supporting the read/write
  1558. syscalls, it's possible to isolate those applications in
  1559. their own address space using seccomp. Once seccomp is
  1560. enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
  1561. and the task is only allowed to execute a few safe syscalls
  1562. defined by each seccomp mode.
  1563. config CC_STACKPROTECTOR
  1564. bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
  1565. depends on EXPERIMENTAL
  1566. help
  1567. This option turns on the -fstack-protector GCC feature. This
  1568. feature puts, at the beginning of functions, a canary value on
  1569. the stack just before the return address, and validates
  1570. the value just before actually returning. Stack based buffer
  1571. overflows (that need to overwrite this return address) now also
  1572. overwrite the canary, which gets detected and the attack is then
  1573. neutralized via a kernel panic.
  1574. This feature requires gcc version 4.2 or above.
  1575. config XEN_DOM0
  1576. def_bool y
  1577. depends on XEN
  1578. config XEN
  1579. bool "Xen guest support on ARM (EXPERIMENTAL)"
  1580. depends on EXPERIMENTAL && ARM && OF
  1581. depends on CPU_V7 && !CPU_V6
  1582. help
  1583. Say Y if you want to run Linux in a Virtual Machine on Xen on ARM.
  1584. endmenu
  1585. menu "Boot options"
  1586. config USE_OF
  1587. bool "Flattened Device Tree support"
  1588. select IRQ_DOMAIN
  1589. select OF
  1590. select OF_EARLY_FLATTREE
  1591. help
  1592. Include support for flattened device tree machine descriptions.
  1593. config ATAGS
  1594. bool "Support for the traditional ATAGS boot data passing" if USE_OF
  1595. default y
  1596. help
  1597. This is the traditional way of passing data to the kernel at boot
  1598. time. If you are solely relying on the flattened device tree (or
  1599. the ARM_ATAG_DTB_COMPAT option) then you may unselect this option
  1600. to remove ATAGS support from your kernel binary. If unsure,
  1601. leave this to y.
  1602. config DEPRECATED_PARAM_STRUCT
  1603. bool "Provide old way to pass kernel parameters"
  1604. depends on ATAGS
  1605. help
  1606. This was deprecated in 2001 and announced to live on for 5 years.
  1607. Some old boot loaders still use this way.
  1608. # Compressed boot loader in ROM. Yes, we really want to ask about
  1609. # TEXT and BSS so we preserve their values in the config files.
  1610. config ZBOOT_ROM_TEXT
  1611. hex "Compressed ROM boot loader base address"
  1612. default "0"
  1613. help
  1614. The physical address at which the ROM-able zImage is to be
  1615. placed in the target. Platforms which normally make use of
  1616. ROM-able zImage formats normally set this to a suitable
  1617. value in their defconfig file.
  1618. If ZBOOT_ROM is not enabled, this has no effect.
  1619. config ZBOOT_ROM_BSS
  1620. hex "Compressed ROM boot loader BSS address"
  1621. default "0"
  1622. help
  1623. The base address of an area of read/write memory in the target
  1624. for the ROM-able zImage which must be available while the
  1625. decompressor is running. It must be large enough to hold the
  1626. entire decompressed kernel plus an additional 128 KiB.
  1627. Platforms which normally make use of ROM-able zImage formats
  1628. normally set this to a suitable value in their defconfig file.
  1629. If ZBOOT_ROM is not enabled, this has no effect.
  1630. config ZBOOT_ROM
  1631. bool "Compressed boot loader in ROM/flash"
  1632. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  1633. help
  1634. Say Y here if you intend to execute your compressed kernel image
  1635. (zImage) directly from ROM or flash. If unsure, say N.
  1636. choice
  1637. prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)"
  1638. depends on ZBOOT_ROM && ARCH_SH7372 && EXPERIMENTAL
  1639. default ZBOOT_ROM_NONE
  1640. help
  1641. Include experimental SD/MMC loading code in the ROM-able zImage.
  1642. With this enabled it is possible to write the ROM-able zImage
  1643. kernel image to an MMC or SD card and boot the kernel straight
  1644. from the reset vector. At reset the processor Mask ROM will load
  1645. the first part of the ROM-able zImage which in turn loads the
  1646. rest the kernel image to RAM.
  1647. config ZBOOT_ROM_NONE
  1648. bool "No SD/MMC loader in zImage (EXPERIMENTAL)"
  1649. help
  1650. Do not load image from SD or MMC
  1651. config ZBOOT_ROM_MMCIF
  1652. bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
  1653. help
  1654. Load image from MMCIF hardware block.
  1655. config ZBOOT_ROM_SH_MOBILE_SDHI
  1656. bool "Include SuperH Mobile SDHI loader in zImage (EXPERIMENTAL)"
  1657. help
  1658. Load image from SDHI hardware block
  1659. endchoice
  1660. config ARM_APPENDED_DTB
  1661. bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
  1662. depends on OF && !ZBOOT_ROM && EXPERIMENTAL
  1663. help
  1664. With this option, the boot code will look for a device tree binary
  1665. (DTB) appended to zImage
  1666. (e.g. cat zImage <filename>.dtb > zImage_w_dtb).
  1667. This is meant as a backward compatibility convenience for those
  1668. systems with a bootloader that can't be upgraded to accommodate
  1669. the documented boot protocol using a device tree.
  1670. Beware that there is very little in terms of protection against
  1671. this option being confused by leftover garbage in memory that might
  1672. look like a DTB header after a reboot if no actual DTB is appended
  1673. to zImage. Do not leave this option active in a production kernel
  1674. if you don't intend to always append a DTB. Proper passing of the
  1675. location into r2 of a bootloader provided DTB is always preferable
  1676. to this option.
  1677. config ARM_ATAG_DTB_COMPAT
  1678. bool "Supplement the appended DTB with traditional ATAG information"
  1679. depends on ARM_APPENDED_DTB
  1680. help
  1681. Some old bootloaders can't be updated to a DTB capable one, yet
  1682. they provide ATAGs with memory configuration, the ramdisk address,
  1683. the kernel cmdline string, etc. Such information is dynamically
  1684. provided by the bootloader and can't always be stored in a static
  1685. DTB. To allow a device tree enabled kernel to be used with such
  1686. bootloaders, this option allows zImage to extract the information
  1687. from the ATAG list and store it at run time into the appended DTB.
  1688. choice
  1689. prompt "Kernel command line type" if ARM_ATAG_DTB_COMPAT
  1690. default ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
  1691. config ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
  1692. bool "Use bootloader kernel arguments if available"
  1693. help
  1694. Uses the command-line options passed by the boot loader instead of
  1695. the device tree bootargs property. If the boot loader doesn't provide
  1696. any, the device tree bootargs property will be used.
  1697. config ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEND
  1698. bool "Extend with bootloader kernel arguments"
  1699. help
  1700. The command-line arguments provided by the boot loader will be
  1701. appended to the the device tree bootargs property.
  1702. endchoice
  1703. config CMDLINE
  1704. string "Default kernel command string"
  1705. default ""
  1706. help
  1707. On some architectures (EBSA110 and CATS), there is currently no way
  1708. for the boot loader to pass arguments to the kernel. For these
  1709. architectures, you should supply some command-line options at build
  1710. time by entering them here. As a minimum, you should specify the
  1711. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  1712. choice
  1713. prompt "Kernel command line type" if CMDLINE != ""
  1714. default CMDLINE_FROM_BOOTLOADER
  1715. depends on ATAGS
  1716. config CMDLINE_FROM_BOOTLOADER
  1717. bool "Use bootloader kernel arguments if available"
  1718. help
  1719. Uses the command-line options passed by the boot loader. If
  1720. the boot loader doesn't provide any, the default kernel command
  1721. string provided in CMDLINE will be used.
  1722. config CMDLINE_EXTEND
  1723. bool "Extend bootloader kernel arguments"
  1724. help
  1725. The command-line arguments provided by the boot loader will be
  1726. appended to the default kernel command string.
  1727. config CMDLINE_FORCE
  1728. bool "Always use the default kernel command string"
  1729. help
  1730. Always use the default kernel command string, even if the boot
  1731. loader passes other arguments to the kernel.
  1732. This is useful if you cannot or don't want to change the
  1733. command-line options your boot loader passes to the kernel.
  1734. endchoice
  1735. config XIP_KERNEL
  1736. bool "Kernel Execute-In-Place from ROM"
  1737. depends on !ZBOOT_ROM && !ARM_LPAE && !ARCH_MULTIPLATFORM
  1738. help
  1739. Execute-In-Place allows the kernel to run from non-volatile storage
  1740. directly addressable by the CPU, such as NOR flash. This saves RAM
  1741. space since the text section of the kernel is not loaded from flash
  1742. to RAM. Read-write sections, such as the data section and stack,
  1743. are still copied to RAM. The XIP kernel is not compressed since
  1744. it has to run directly from flash, so it will take more space to
  1745. store it. The flash address used to link the kernel object files,
  1746. and for storing it, is configuration dependent. Therefore, if you
  1747. say Y here, you must know the proper physical address where to
  1748. store the kernel image depending on your own flash memory usage.
  1749. Also note that the make target becomes "make xipImage" rather than
  1750. "make zImage" or "make Image". The final kernel binary to put in
  1751. ROM memory will be arch/arm/boot/xipImage.
  1752. If unsure, say N.
  1753. config XIP_PHYS_ADDR
  1754. hex "XIP Kernel Physical Location"
  1755. depends on XIP_KERNEL
  1756. default "0x00080000"
  1757. help
  1758. This is the physical address in your flash memory the kernel will
  1759. be linked for and stored to. This address is dependent on your
  1760. own flash usage.
  1761. config KEXEC
  1762. bool "Kexec system call (EXPERIMENTAL)"
  1763. depends on EXPERIMENTAL && (!SMP || HOTPLUG_CPU)
  1764. help
  1765. kexec is a system call that implements the ability to shutdown your
  1766. current kernel, and to start another kernel. It is like a reboot
  1767. but it is independent of the system firmware. And like a reboot
  1768. you can start any kernel with it, not just Linux.
  1769. It is an ongoing process to be certain the hardware in a machine
  1770. is properly shutdown, so do not be surprised if this code does not
  1771. initially work for you. It may help to enable device hotplugging
  1772. support.
  1773. config ATAGS_PROC
  1774. bool "Export atags in procfs"
  1775. depends on ATAGS && KEXEC
  1776. default y
  1777. help
  1778. Should the atags used to boot the kernel be exported in an "atags"
  1779. file in procfs. Useful with kexec.
  1780. config CRASH_DUMP
  1781. bool "Build kdump crash kernel (EXPERIMENTAL)"
  1782. depends on EXPERIMENTAL
  1783. help
  1784. Generate crash dump after being started by kexec. This should
  1785. be normally only set in special crash dump kernels which are
  1786. loaded in the main kernel with kexec-tools into a specially
  1787. reserved region and then later executed after a crash by
  1788. kdump/kexec. The crash dump kernel must be compiled to a
  1789. memory address not used by the main kernel
  1790. For more details see Documentation/kdump/kdump.txt
  1791. config AUTO_ZRELADDR
  1792. bool "Auto calculation of the decompressed kernel image address"
  1793. depends on !ZBOOT_ROM && !ARCH_U300
  1794. help
  1795. ZRELADDR is the physical address where the decompressed kernel
  1796. image will be placed. If AUTO_ZRELADDR is selected, the address
  1797. will be determined at run-time by masking the current IP with
  1798. 0xf8000000. This assumes the zImage being placed in the first 128MB
  1799. from start of memory.
  1800. endmenu
  1801. menu "CPU Power Management"
  1802. if ARCH_HAS_CPUFREQ
  1803. source "drivers/cpufreq/Kconfig"
  1804. config CPU_FREQ_IMX
  1805. tristate "CPUfreq driver for i.MX CPUs"
  1806. depends on ARCH_MXC && CPU_FREQ
  1807. select CPU_FREQ_TABLE
  1808. help
  1809. This enables the CPUfreq driver for i.MX CPUs.
  1810. config CPU_FREQ_SA1100
  1811. bool
  1812. config CPU_FREQ_SA1110
  1813. bool
  1814. config CPU_FREQ_INTEGRATOR
  1815. tristate "CPUfreq driver for ARM Integrator CPUs"
  1816. depends on ARCH_INTEGRATOR && CPU_FREQ
  1817. default y
  1818. help
  1819. This enables the CPUfreq driver for ARM Integrator CPUs.
  1820. For details, take a look at <file:Documentation/cpu-freq>.
  1821. If in doubt, say Y.
  1822. config CPU_FREQ_PXA
  1823. bool
  1824. depends on CPU_FREQ && ARCH_PXA && PXA25x
  1825. default y
  1826. select CPU_FREQ_DEFAULT_GOV_USERSPACE
  1827. select CPU_FREQ_TABLE
  1828. config CPU_FREQ_S3C
  1829. bool
  1830. help
  1831. Internal configuration node for common cpufreq on Samsung SoC
  1832. config CPU_FREQ_S3C24XX
  1833. bool "CPUfreq driver for Samsung S3C24XX series CPUs (EXPERIMENTAL)"
  1834. depends on ARCH_S3C24XX && CPU_FREQ && EXPERIMENTAL
  1835. select CPU_FREQ_S3C
  1836. help
  1837. This enables the CPUfreq driver for the Samsung S3C24XX family
  1838. of CPUs.
  1839. For details, take a look at <file:Documentation/cpu-freq>.
  1840. If in doubt, say N.
  1841. config CPU_FREQ_S3C24XX_PLL
  1842. bool "Support CPUfreq changing of PLL frequency (EXPERIMENTAL)"
  1843. depends on CPU_FREQ_S3C24XX && EXPERIMENTAL
  1844. help
  1845. Compile in support for changing the PLL frequency from the
  1846. S3C24XX series CPUfreq driver. The PLL takes time to settle
  1847. after a frequency change, so by default it is not enabled.
  1848. This also means that the PLL tables for the selected CPU(s) will
  1849. be built which may increase the size of the kernel image.
  1850. config CPU_FREQ_S3C24XX_DEBUG
  1851. bool "Debug CPUfreq Samsung driver core"
  1852. depends on CPU_FREQ_S3C24XX
  1853. help
  1854. Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
  1855. config CPU_FREQ_S3C24XX_IODEBUG
  1856. bool "Debug CPUfreq Samsung driver IO timing"
  1857. depends on CPU_FREQ_S3C24XX
  1858. help
  1859. Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
  1860. config CPU_FREQ_S3C24XX_DEBUGFS
  1861. bool "Export debugfs for CPUFreq"
  1862. depends on CPU_FREQ_S3C24XX && DEBUG_FS
  1863. help
  1864. Export status information via debugfs.
  1865. endif
  1866. source "drivers/cpuidle/Kconfig"
  1867. endmenu
  1868. menu "Floating point emulation"
  1869. comment "At least one emulation must be selected"
  1870. config FPE_NWFPE
  1871. bool "NWFPE math emulation"
  1872. depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
  1873. ---help---
  1874. Say Y to include the NWFPE floating point emulator in the kernel.
  1875. This is necessary to run most binaries. Linux does not currently
  1876. support floating point hardware so you need to say Y here even if
  1877. your machine has an FPA or floating point co-processor podule.
  1878. You may say N here if you are going to load the Acorn FPEmulator
  1879. early in the bootup.
  1880. config FPE_NWFPE_XP
  1881. bool "Support extended precision"
  1882. depends on FPE_NWFPE
  1883. help
  1884. Say Y to include 80-bit support in the kernel floating-point
  1885. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  1886. Note that gcc does not generate 80-bit operations by default,
  1887. so in most cases this option only enlarges the size of the
  1888. floating point emulator without any good reason.
  1889. You almost surely want to say N here.
  1890. config FPE_FASTFPE
  1891. bool "FastFPE math emulation (EXPERIMENTAL)"
  1892. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3 && EXPERIMENTAL
  1893. ---help---
  1894. Say Y here to include the FAST floating point emulator in the kernel.
  1895. This is an experimental much faster emulator which now also has full
  1896. precision for the mantissa. It does not support any exceptions.
  1897. It is very simple, and approximately 3-6 times faster than NWFPE.
  1898. It should be sufficient for most programs. It may be not suitable
  1899. for scientific calculations, but you have to check this for yourself.
  1900. If you do not feel you need a faster FP emulation you should better
  1901. choose NWFPE.
  1902. config VFP
  1903. bool "VFP-format floating point maths"
  1904. depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  1905. help
  1906. Say Y to include VFP support code in the kernel. This is needed
  1907. if your hardware includes a VFP unit.
  1908. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  1909. release notes and additional status information.
  1910. Say N if your target does not have VFP hardware.
  1911. config VFPv3
  1912. bool
  1913. depends on VFP
  1914. default y if CPU_V7
  1915. config NEON
  1916. bool "Advanced SIMD (NEON) Extension support"
  1917. depends on VFPv3 && CPU_V7
  1918. help
  1919. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  1920. Extension.
  1921. endmenu
  1922. menu "Userspace binary formats"
  1923. source "fs/Kconfig.binfmt"
  1924. config ARTHUR
  1925. tristate "RISC OS personality"
  1926. depends on !AEABI
  1927. help
  1928. Say Y here to include the kernel code necessary if you want to run
  1929. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  1930. experimental; if this sounds frightening, say N and sleep in peace.
  1931. You can also say M here to compile this support as a module (which
  1932. will be called arthur).
  1933. endmenu
  1934. menu "Power management options"
  1935. source "kernel/power/Kconfig"
  1936. config ARCH_SUSPEND_POSSIBLE
  1937. depends on !ARCH_S5PC100
  1938. depends on CPU_ARM920T || CPU_ARM926T || CPU_SA1100 || \
  1939. CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE || CPU_MOHAWK
  1940. def_bool y
  1941. config ARM_CPU_SUSPEND
  1942. def_bool PM_SLEEP
  1943. endmenu
  1944. source "net/Kconfig"
  1945. source "drivers/Kconfig"
  1946. source "fs/Kconfig"
  1947. source "arch/arm/Kconfig.debug"
  1948. source "security/Kconfig"
  1949. source "crypto/Kconfig"
  1950. source "lib/Kconfig"