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_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
  7. select ARCH_HAVE_CUSTOM_GPIO_H
  8. select ARCH_WANT_IPC_PARSE_VERSION
  9. select BUILDTIME_EXTABLE_SORT if MMU
  10. select CLONE_BACKWARDS
  11. select CPU_PM if (SUSPEND || CPU_IDLE)
  12. select DCACHE_WORD_ACCESS if (CPU_V6 || CPU_V6K || CPU_V7) && !CPU_BIG_ENDIAN && MMU
  13. select GENERIC_ATOMIC64 if (CPU_V7M || CPU_V6 || !CPU_32v6K || !AEABI)
  14. select GENERIC_CLOCKEVENTS_BROADCAST if SMP
  15. select GENERIC_IDLE_POLL_SETUP
  16. select GENERIC_IRQ_PROBE
  17. select GENERIC_IRQ_SHOW
  18. select GENERIC_PCI_IOMAP
  19. select GENERIC_SCHED_CLOCK
  20. select GENERIC_SMP_IDLE_THREAD
  21. select GENERIC_STRNCPY_FROM_USER
  22. select GENERIC_STRNLEN_USER
  23. select HARDIRQS_SW_RESEND
  24. select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL
  25. select HAVE_ARCH_KGDB
  26. select HAVE_ARCH_SECCOMP_FILTER
  27. select HAVE_ARCH_TRACEHOOK
  28. select HAVE_BPF_JIT
  29. select HAVE_CONTEXT_TRACKING
  30. select HAVE_C_RECORDMCOUNT
  31. select HAVE_DEBUG_KMEMLEAK
  32. select HAVE_DMA_API_DEBUG
  33. select HAVE_DMA_ATTRS
  34. select HAVE_DMA_CONTIGUOUS if MMU
  35. select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL)
  36. select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
  37. select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL)
  38. select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
  39. select HAVE_GENERIC_DMA_COHERENT
  40. select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7))
  41. select HAVE_IDE if PCI || ISA || PCMCIA
  42. select HAVE_IRQ_TIME_ACCOUNTING
  43. select HAVE_KERNEL_GZIP
  44. select HAVE_KERNEL_LZ4
  45. select HAVE_KERNEL_LZMA
  46. select HAVE_KERNEL_LZO
  47. select HAVE_KERNEL_XZ
  48. select HAVE_KPROBES if !XIP_KERNEL
  49. select HAVE_KRETPROBES if (HAVE_KPROBES)
  50. select HAVE_MEMBLOCK
  51. select HAVE_MOD_ARCH_SPECIFIC if ARM_UNWIND
  52. select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
  53. select HAVE_PERF_EVENTS
  54. select HAVE_REGS_AND_STACK_ACCESS_API
  55. select HAVE_SYSCALL_TRACEPOINTS
  56. select HAVE_UID16
  57. select IRQ_FORCED_THREADING
  58. select KTIME_SCALAR
  59. select MODULES_USE_ELF_REL
  60. select OLD_SIGACTION
  61. select OLD_SIGSUSPEND3
  62. select PERF_USE_VMALLOC
  63. select RTC_LIB
  64. select SYS_SUPPORTS_APM_EMULATION
  65. # Above selects are sorted alphabetically; please add new ones
  66. # according to that. Thanks.
  67. help
  68. The ARM series is a line of low-power-consumption RISC chip designs
  69. licensed by ARM Ltd and targeted at embedded applications and
  70. handhelds such as the Compaq IPAQ. ARM-based PCs are no longer
  71. manufactured, but legacy ARM-based PC hardware remains popular in
  72. Europe. There is an ARM Linux project with a web page at
  73. <http://www.arm.linux.org.uk/>.
  74. config ARM_HAS_SG_CHAIN
  75. bool
  76. config NEED_SG_DMA_LENGTH
  77. bool
  78. config ARM_DMA_USE_IOMMU
  79. bool
  80. select ARM_HAS_SG_CHAIN
  81. select NEED_SG_DMA_LENGTH
  82. if ARM_DMA_USE_IOMMU
  83. config ARM_DMA_IOMMU_ALIGNMENT
  84. int "Maximum PAGE_SIZE order of alignment for DMA IOMMU buffers"
  85. range 4 9
  86. default 8
  87. help
  88. DMA mapping framework by default aligns all buffers to the smallest
  89. PAGE_SIZE order which is greater than or equal to the requested buffer
  90. size. This works well for buffers up to a few hundreds kilobytes, but
  91. for larger buffers it just a waste of address space. Drivers which has
  92. relatively small addressing window (like 64Mib) might run out of
  93. virtual space with just a few allocations.
  94. With this parameter you can specify the maximum PAGE_SIZE order for
  95. DMA IOMMU buffers. Larger buffers will be aligned only to this
  96. specified order. The order is expressed as a power of two multiplied
  97. by the PAGE_SIZE.
  98. endif
  99. config HAVE_PWM
  100. bool
  101. config MIGHT_HAVE_PCI
  102. bool
  103. config SYS_SUPPORTS_APM_EMULATION
  104. bool
  105. config HAVE_TCM
  106. bool
  107. select GENERIC_ALLOCATOR
  108. config HAVE_PROC_CPU
  109. bool
  110. config NO_IOPORT
  111. bool
  112. config EISA
  113. bool
  114. ---help---
  115. The Extended Industry Standard Architecture (EISA) bus was
  116. developed as an open alternative to the IBM MicroChannel bus.
  117. The EISA bus provided some of the features of the IBM MicroChannel
  118. bus while maintaining backward compatibility with cards made for
  119. the older ISA bus. The EISA bus saw limited use between 1988 and
  120. 1995 when it was made obsolete by the PCI bus.
  121. Say Y here if you are building a kernel for an EISA-based machine.
  122. Otherwise, say N.
  123. config SBUS
  124. bool
  125. config STACKTRACE_SUPPORT
  126. bool
  127. default y
  128. config HAVE_LATENCYTOP_SUPPORT
  129. bool
  130. depends on !SMP
  131. default y
  132. config LOCKDEP_SUPPORT
  133. bool
  134. default y
  135. config TRACE_IRQFLAGS_SUPPORT
  136. bool
  137. default y
  138. config RWSEM_GENERIC_SPINLOCK
  139. bool
  140. default y
  141. config RWSEM_XCHGADD_ALGORITHM
  142. bool
  143. config ARCH_HAS_ILOG2_U32
  144. bool
  145. config ARCH_HAS_ILOG2_U64
  146. bool
  147. config ARCH_HAS_CPUFREQ
  148. bool
  149. help
  150. Internal node to signify that the ARCH has CPUFREQ support
  151. and that the relevant menu configurations are displayed for
  152. it.
  153. config ARCH_HAS_BANDGAP
  154. bool
  155. config GENERIC_HWEIGHT
  156. bool
  157. default y
  158. config GENERIC_CALIBRATE_DELAY
  159. bool
  160. default y
  161. config ARCH_MAY_HAVE_PC_FDC
  162. bool
  163. config ZONE_DMA
  164. bool
  165. config NEED_DMA_MAP_STATE
  166. def_bool y
  167. config ARCH_HAS_DMA_SET_COHERENT_MASK
  168. bool
  169. config GENERIC_ISA_DMA
  170. bool
  171. config FIQ
  172. bool
  173. config NEED_RET_TO_USER
  174. bool
  175. config ARCH_MTD_XIP
  176. bool
  177. config VECTORS_BASE
  178. hex
  179. default 0xffff0000 if MMU || CPU_HIGH_VECTOR
  180. default DRAM_BASE if REMAP_VECTORS_TO_RAM
  181. default 0x00000000
  182. help
  183. The base address of exception vectors. This must be two pages
  184. in size.
  185. config ARM_PATCH_PHYS_VIRT
  186. bool "Patch physical to virtual translations at runtime" if EMBEDDED
  187. default y
  188. depends on !XIP_KERNEL && MMU
  189. depends on !ARCH_REALVIEW || !SPARSEMEM
  190. help
  191. Patch phys-to-virt and virt-to-phys translation functions at
  192. boot and module load time according to the position of the
  193. kernel in system memory.
  194. This can only be used with non-XIP MMU kernels where the base
  195. of physical memory is at a 16MB boundary.
  196. Only disable this option if you know that you do not require
  197. this feature (eg, building a kernel for a single machine) and
  198. you need to shrink the kernel to the minimal size.
  199. config NEED_MACH_GPIO_H
  200. bool
  201. help
  202. Select this when mach/gpio.h is required to provide special
  203. definitions for this platform. The need for mach/gpio.h should
  204. be avoided when possible.
  205. config NEED_MACH_IO_H
  206. bool
  207. help
  208. Select this when mach/io.h is required to provide special
  209. definitions for this platform. The need for mach/io.h should
  210. be avoided when possible.
  211. config NEED_MACH_MEMORY_H
  212. bool
  213. help
  214. Select this when mach/memory.h is required to provide special
  215. definitions for this platform. The need for mach/memory.h should
  216. be avoided when possible.
  217. config PHYS_OFFSET
  218. hex "Physical address of main memory" if MMU
  219. depends on !ARM_PATCH_PHYS_VIRT && !NEED_MACH_MEMORY_H
  220. default DRAM_BASE if !MMU
  221. help
  222. Please provide the physical address corresponding to the
  223. location of main memory in your system.
  224. config GENERIC_BUG
  225. def_bool y
  226. depends on BUG
  227. source "init/Kconfig"
  228. source "kernel/Kconfig.freezer"
  229. menu "System Type"
  230. config MMU
  231. bool "MMU-based Paged Memory Management Support"
  232. default y
  233. help
  234. Select if you want MMU-based virtualised addressing space
  235. support by paged memory management. If unsure, say 'Y'.
  236. #
  237. # The "ARM system type" choice list is ordered alphabetically by option
  238. # text. Please add new entries in the option alphabetic order.
  239. #
  240. choice
  241. prompt "ARM system type"
  242. default ARCH_VERSATILE if !MMU
  243. default ARCH_MULTIPLATFORM if MMU
  244. config ARCH_MULTIPLATFORM
  245. bool "Allow multiple platforms to be selected"
  246. depends on MMU
  247. select ARM_PATCH_PHYS_VIRT
  248. select AUTO_ZRELADDR
  249. select COMMON_CLK
  250. select MULTI_IRQ_HANDLER
  251. select SPARSE_IRQ
  252. select USE_OF
  253. config ARCH_INTEGRATOR
  254. bool "ARM Ltd. Integrator family"
  255. select ARCH_HAS_CPUFREQ
  256. select ARM_AMBA
  257. select COMMON_CLK
  258. select COMMON_CLK_VERSATILE
  259. select GENERIC_CLOCKEVENTS
  260. select HAVE_TCM
  261. select ICST
  262. select MULTI_IRQ_HANDLER
  263. select NEED_MACH_MEMORY_H
  264. select PLAT_VERSATILE
  265. select SPARSE_IRQ
  266. select VERSATILE_FPGA_IRQ
  267. help
  268. Support for ARM's Integrator platform.
  269. config ARCH_REALVIEW
  270. bool "ARM Ltd. RealView family"
  271. select ARCH_WANT_OPTIONAL_GPIOLIB
  272. select ARM_AMBA
  273. select ARM_TIMER_SP804
  274. select COMMON_CLK
  275. select COMMON_CLK_VERSATILE
  276. select GENERIC_CLOCKEVENTS
  277. select GPIO_PL061 if GPIOLIB
  278. select ICST
  279. select NEED_MACH_MEMORY_H
  280. select PLAT_VERSATILE
  281. select PLAT_VERSATILE_CLCD
  282. help
  283. This enables support for ARM Ltd RealView boards.
  284. config ARCH_VERSATILE
  285. bool "ARM Ltd. Versatile family"
  286. select ARCH_WANT_OPTIONAL_GPIOLIB
  287. select ARM_AMBA
  288. select ARM_TIMER_SP804
  289. select ARM_VIC
  290. select CLKDEV_LOOKUP
  291. select GENERIC_CLOCKEVENTS
  292. select HAVE_MACH_CLKDEV
  293. select ICST
  294. select PLAT_VERSATILE
  295. select PLAT_VERSATILE_CLCD
  296. select PLAT_VERSATILE_CLOCK
  297. select VERSATILE_FPGA_IRQ
  298. help
  299. This enables support for ARM Ltd Versatile board.
  300. config ARCH_AT91
  301. bool "Atmel AT91"
  302. select ARCH_REQUIRE_GPIOLIB
  303. select CLKDEV_LOOKUP
  304. select HAVE_CLK
  305. select IRQ_DOMAIN
  306. select NEED_MACH_GPIO_H
  307. select NEED_MACH_IO_H if PCCARD
  308. select PINCTRL
  309. select PINCTRL_AT91 if USE_OF
  310. help
  311. This enables support for systems based on Atmel
  312. AT91RM9200 and AT91SAM9* processors.
  313. config ARCH_CLPS711X
  314. bool "Cirrus Logic CLPS711x/EP721x/EP731x-based"
  315. select ARCH_REQUIRE_GPIOLIB
  316. select AUTO_ZRELADDR
  317. select CLKDEV_LOOKUP
  318. select CLKSRC_MMIO
  319. select COMMON_CLK
  320. select CPU_ARM720T
  321. select GENERIC_CLOCKEVENTS
  322. select MFD_SYSCON
  323. select MULTI_IRQ_HANDLER
  324. select SPARSE_IRQ
  325. help
  326. Support for Cirrus Logic 711x/721x/731x based boards.
  327. config ARCH_GEMINI
  328. bool "Cortina Systems Gemini"
  329. select ARCH_REQUIRE_GPIOLIB
  330. select ARCH_USES_GETTIMEOFFSET
  331. select CPU_FA526
  332. select NEED_MACH_GPIO_H
  333. help
  334. Support for the Cortina Systems Gemini family SoCs
  335. config ARCH_EBSA110
  336. bool "EBSA-110"
  337. select ARCH_USES_GETTIMEOFFSET
  338. select CPU_SA110
  339. select ISA
  340. select NEED_MACH_IO_H
  341. select NEED_MACH_MEMORY_H
  342. select NO_IOPORT
  343. help
  344. This is an evaluation board for the StrongARM processor available
  345. from Digital. It has limited hardware on-board, including an
  346. Ethernet interface, two PCMCIA sockets, two serial ports and a
  347. parallel port.
  348. config ARCH_EP93XX
  349. bool "EP93xx-based"
  350. select ARCH_HAS_HOLES_MEMORYMODEL
  351. select ARCH_REQUIRE_GPIOLIB
  352. select ARCH_USES_GETTIMEOFFSET
  353. select ARM_AMBA
  354. select ARM_VIC
  355. select CLKDEV_LOOKUP
  356. select CPU_ARM920T
  357. select NEED_MACH_MEMORY_H
  358. help
  359. This enables support for the Cirrus EP93xx series of CPUs.
  360. config ARCH_FOOTBRIDGE
  361. bool "FootBridge"
  362. select CPU_SA110
  363. select FOOTBRIDGE
  364. select GENERIC_CLOCKEVENTS
  365. select HAVE_IDE
  366. select NEED_MACH_IO_H if !MMU
  367. select NEED_MACH_MEMORY_H
  368. help
  369. Support for systems based on the DC21285 companion chip
  370. ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
  371. config ARCH_NETX
  372. bool "Hilscher NetX based"
  373. select ARM_VIC
  374. select CLKSRC_MMIO
  375. select CPU_ARM926T
  376. select GENERIC_CLOCKEVENTS
  377. help
  378. This enables support for systems based on the Hilscher NetX Soc
  379. config ARCH_IOP13XX
  380. bool "IOP13xx-based"
  381. depends on MMU
  382. select CPU_XSC3
  383. select NEED_MACH_MEMORY_H
  384. select NEED_RET_TO_USER
  385. select PCI
  386. select PLAT_IOP
  387. select VMSPLIT_1G
  388. help
  389. Support for Intel's IOP13XX (XScale) family of processors.
  390. config ARCH_IOP32X
  391. bool "IOP32x-based"
  392. depends on MMU
  393. select ARCH_REQUIRE_GPIOLIB
  394. select CPU_XSCALE
  395. select GPIO_IOP
  396. select NEED_MACH_GPIO_H
  397. select NEED_RET_TO_USER
  398. select PCI
  399. select PLAT_IOP
  400. help
  401. Support for Intel's 80219 and IOP32X (XScale) family of
  402. processors.
  403. config ARCH_IOP33X
  404. bool "IOP33x-based"
  405. depends on MMU
  406. select ARCH_REQUIRE_GPIOLIB
  407. select CPU_XSCALE
  408. select GPIO_IOP
  409. select NEED_MACH_GPIO_H
  410. select NEED_RET_TO_USER
  411. select PCI
  412. select PLAT_IOP
  413. help
  414. Support for Intel's IOP33X (XScale) family of processors.
  415. config ARCH_IXP4XX
  416. bool "IXP4xx-based"
  417. depends on MMU
  418. select ARCH_HAS_DMA_SET_COHERENT_MASK
  419. select ARCH_REQUIRE_GPIOLIB
  420. select CLKSRC_MMIO
  421. select CPU_XSCALE
  422. select DMABOUNCE if PCI
  423. select GENERIC_CLOCKEVENTS
  424. select MIGHT_HAVE_PCI
  425. select NEED_MACH_IO_H
  426. select USB_EHCI_BIG_ENDIAN_DESC
  427. select USB_EHCI_BIG_ENDIAN_MMIO
  428. help
  429. Support for Intel's IXP4XX (XScale) family of processors.
  430. config ARCH_DOVE
  431. bool "Marvell Dove"
  432. select ARCH_REQUIRE_GPIOLIB
  433. select CPU_PJ4
  434. select GENERIC_CLOCKEVENTS
  435. select MIGHT_HAVE_PCI
  436. select MVEBU_MBUS
  437. select PINCTRL
  438. select PINCTRL_DOVE
  439. select PLAT_ORION_LEGACY
  440. select USB_ARCH_HAS_EHCI
  441. help
  442. Support for the Marvell Dove SoC 88AP510
  443. config ARCH_KIRKWOOD
  444. bool "Marvell Kirkwood"
  445. select ARCH_HAS_CPUFREQ
  446. select ARCH_REQUIRE_GPIOLIB
  447. select CPU_FEROCEON
  448. select GENERIC_CLOCKEVENTS
  449. select MVEBU_MBUS
  450. select PCI
  451. select PCI_QUIRKS
  452. select PINCTRL
  453. select PINCTRL_KIRKWOOD
  454. select PLAT_ORION_LEGACY
  455. help
  456. Support for the following Marvell Kirkwood series SoCs:
  457. 88F6180, 88F6192 and 88F6281.
  458. config ARCH_MV78XX0
  459. bool "Marvell MV78xx0"
  460. select ARCH_REQUIRE_GPIOLIB
  461. select CPU_FEROCEON
  462. select GENERIC_CLOCKEVENTS
  463. select MVEBU_MBUS
  464. select PCI
  465. select PLAT_ORION_LEGACY
  466. help
  467. Support for the following Marvell MV78xx0 series SoCs:
  468. MV781x0, MV782x0.
  469. config ARCH_ORION5X
  470. bool "Marvell Orion"
  471. depends on MMU
  472. select ARCH_REQUIRE_GPIOLIB
  473. select CPU_FEROCEON
  474. select GENERIC_CLOCKEVENTS
  475. select MVEBU_MBUS
  476. select PCI
  477. select PLAT_ORION_LEGACY
  478. help
  479. Support for the following Marvell Orion 5x series SoCs:
  480. Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
  481. Orion-2 (5281), Orion-1-90 (6183).
  482. config ARCH_MMP
  483. bool "Marvell PXA168/910/MMP2"
  484. depends on MMU
  485. select ARCH_REQUIRE_GPIOLIB
  486. select CLKDEV_LOOKUP
  487. select GENERIC_ALLOCATOR
  488. select GENERIC_CLOCKEVENTS
  489. select GPIO_PXA
  490. select IRQ_DOMAIN
  491. select MULTI_IRQ_HANDLER
  492. select NEED_MACH_GPIO_H
  493. select PINCTRL
  494. select PLAT_PXA
  495. select SPARSE_IRQ
  496. help
  497. Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
  498. config ARCH_KS8695
  499. bool "Micrel/Kendin KS8695"
  500. select ARCH_REQUIRE_GPIOLIB
  501. select CLKSRC_MMIO
  502. select CPU_ARM922T
  503. select GENERIC_CLOCKEVENTS
  504. select NEED_MACH_MEMORY_H
  505. help
  506. Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
  507. System-on-Chip devices.
  508. config ARCH_W90X900
  509. bool "Nuvoton W90X900 CPU"
  510. select ARCH_REQUIRE_GPIOLIB
  511. select CLKDEV_LOOKUP
  512. select CLKSRC_MMIO
  513. select CPU_ARM926T
  514. select GENERIC_CLOCKEVENTS
  515. help
  516. Support for Nuvoton (Winbond logic dept.) ARM9 processor,
  517. At present, the w90x900 has been renamed nuc900, regarding
  518. the ARM series product line, you can login the following
  519. link address to know more.
  520. <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
  521. ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
  522. config ARCH_LPC32XX
  523. bool "NXP LPC32XX"
  524. select ARCH_REQUIRE_GPIOLIB
  525. select ARM_AMBA
  526. select CLKDEV_LOOKUP
  527. select CLKSRC_MMIO
  528. select CPU_ARM926T
  529. select GENERIC_CLOCKEVENTS
  530. select HAVE_IDE
  531. select HAVE_PWM
  532. select USB_ARCH_HAS_OHCI
  533. select USE_OF
  534. help
  535. Support for the NXP LPC32XX family of processors
  536. config ARCH_PXA
  537. bool "PXA2xx/PXA3xx-based"
  538. depends on MMU
  539. select ARCH_HAS_CPUFREQ
  540. select ARCH_MTD_XIP
  541. select ARCH_REQUIRE_GPIOLIB
  542. select ARM_CPU_SUSPEND if PM
  543. select AUTO_ZRELADDR
  544. select CLKDEV_LOOKUP
  545. select CLKSRC_MMIO
  546. select GENERIC_CLOCKEVENTS
  547. select GPIO_PXA
  548. select HAVE_IDE
  549. select MULTI_IRQ_HANDLER
  550. select NEED_MACH_GPIO_H
  551. select PLAT_PXA
  552. select SPARSE_IRQ
  553. help
  554. Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
  555. config ARCH_MSM
  556. bool "Qualcomm MSM"
  557. select ARCH_REQUIRE_GPIOLIB
  558. select CLKDEV_LOOKUP
  559. select CLKSRC_OF if OF
  560. select COMMON_CLK
  561. select GENERIC_CLOCKEVENTS
  562. help
  563. Support for Qualcomm MSM/QSD based systems. This runs on the
  564. apps processor of the MSM/QSD and depends on a shared memory
  565. interface to the modem processor which runs the baseband
  566. stack and controls some vital subsystems
  567. (clock and power control, etc).
  568. config ARCH_SHMOBILE
  569. bool "Renesas SH-Mobile / R-Mobile"
  570. select ARM_PATCH_PHYS_VIRT
  571. select CLKDEV_LOOKUP
  572. select GENERIC_CLOCKEVENTS
  573. select HAVE_ARM_SCU if SMP
  574. select HAVE_ARM_TWD if SMP
  575. select HAVE_CLK
  576. select HAVE_MACH_CLKDEV
  577. select HAVE_SMP
  578. select MIGHT_HAVE_CACHE_L2X0
  579. select MULTI_IRQ_HANDLER
  580. select NO_IOPORT
  581. select PINCTRL
  582. select PM_GENERIC_DOMAINS if PM
  583. select SPARSE_IRQ
  584. help
  585. Support for Renesas's SH-Mobile and R-Mobile ARM platforms.
  586. config ARCH_RPC
  587. bool "RiscPC"
  588. select ARCH_ACORN
  589. select ARCH_MAY_HAVE_PC_FDC
  590. select ARCH_SPARSEMEM_ENABLE
  591. select ARCH_USES_GETTIMEOFFSET
  592. select FIQ
  593. select HAVE_IDE
  594. select HAVE_PATA_PLATFORM
  595. select ISA_DMA_API
  596. select NEED_MACH_IO_H
  597. select NEED_MACH_MEMORY_H
  598. select NO_IOPORT
  599. select VIRT_TO_BUS
  600. help
  601. On the Acorn Risc-PC, Linux can support the internal IDE disk and
  602. CD-ROM interface, serial and parallel port, and the floppy drive.
  603. config ARCH_SA1100
  604. bool "SA1100-based"
  605. select ARCH_HAS_CPUFREQ
  606. select ARCH_MTD_XIP
  607. select ARCH_REQUIRE_GPIOLIB
  608. select ARCH_SPARSEMEM_ENABLE
  609. select CLKDEV_LOOKUP
  610. select CLKSRC_MMIO
  611. select CPU_FREQ
  612. select CPU_SA1100
  613. select GENERIC_CLOCKEVENTS
  614. select HAVE_IDE
  615. select ISA
  616. select NEED_MACH_GPIO_H
  617. select NEED_MACH_MEMORY_H
  618. select SPARSE_IRQ
  619. help
  620. Support for StrongARM 11x0 based boards.
  621. config ARCH_S3C24XX
  622. bool "Samsung S3C24XX SoCs"
  623. select ARCH_HAS_CPUFREQ
  624. select ARCH_REQUIRE_GPIOLIB
  625. select CLKDEV_LOOKUP
  626. select CLKSRC_SAMSUNG_PWM
  627. select GENERIC_CLOCKEVENTS
  628. select GPIO_SAMSUNG
  629. select HAVE_CLK
  630. select HAVE_S3C2410_I2C if I2C
  631. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  632. select HAVE_S3C_RTC if RTC_CLASS
  633. select MULTI_IRQ_HANDLER
  634. select NEED_MACH_GPIO_H
  635. select NEED_MACH_IO_H
  636. select SAMSUNG_ATAGS
  637. help
  638. Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443
  639. and S3C2450 SoCs based systems, such as the Simtec Electronics BAST
  640. (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or the
  641. Samsung SMDK2410 development board (and derivatives).
  642. config ARCH_S3C64XX
  643. bool "Samsung S3C64XX"
  644. select ARCH_HAS_CPUFREQ
  645. select ARCH_REQUIRE_GPIOLIB
  646. select ARM_VIC
  647. select CLKDEV_LOOKUP
  648. select CLKSRC_SAMSUNG_PWM
  649. select CPU_V6
  650. select GENERIC_CLOCKEVENTS
  651. select GPIO_SAMSUNG
  652. select HAVE_CLK
  653. select HAVE_S3C2410_I2C if I2C
  654. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  655. select HAVE_TCM
  656. select NEED_MACH_GPIO_H
  657. select NO_IOPORT
  658. select PLAT_SAMSUNG
  659. select S3C_DEV_NAND
  660. select S3C_GPIO_TRACK
  661. select SAMSUNG_ATAGS
  662. select SAMSUNG_CLKSRC
  663. select SAMSUNG_GPIOLIB_4BIT
  664. select SAMSUNG_WDT_RESET
  665. select USB_ARCH_HAS_OHCI
  666. help
  667. Samsung S3C64XX series based systems
  668. config ARCH_S5P64X0
  669. bool "Samsung S5P6440 S5P6450"
  670. select CLKDEV_LOOKUP
  671. select CLKSRC_SAMSUNG_PWM
  672. select CPU_V6
  673. select GENERIC_CLOCKEVENTS
  674. select GPIO_SAMSUNG
  675. select HAVE_CLK
  676. select HAVE_S3C2410_I2C if I2C
  677. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  678. select HAVE_S3C_RTC if RTC_CLASS
  679. select NEED_MACH_GPIO_H
  680. select SAMSUNG_ATAGS
  681. select SAMSUNG_WDT_RESET
  682. help
  683. Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
  684. SMDK6450.
  685. config ARCH_S5PC100
  686. bool "Samsung S5PC100"
  687. select ARCH_REQUIRE_GPIOLIB
  688. select CLKDEV_LOOKUP
  689. select CLKSRC_SAMSUNG_PWM
  690. select CPU_V7
  691. select GENERIC_CLOCKEVENTS
  692. select GPIO_SAMSUNG
  693. select HAVE_CLK
  694. select HAVE_S3C2410_I2C if I2C
  695. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  696. select HAVE_S3C_RTC if RTC_CLASS
  697. select NEED_MACH_GPIO_H
  698. select SAMSUNG_ATAGS
  699. select SAMSUNG_WDT_RESET
  700. help
  701. Samsung S5PC100 series based systems
  702. config ARCH_S5PV210
  703. bool "Samsung S5PV210/S5PC110"
  704. select ARCH_HAS_CPUFREQ
  705. select ARCH_HAS_HOLES_MEMORYMODEL
  706. select ARCH_SPARSEMEM_ENABLE
  707. select CLKDEV_LOOKUP
  708. select CLKSRC_SAMSUNG_PWM
  709. select CPU_V7
  710. select GENERIC_CLOCKEVENTS
  711. select GPIO_SAMSUNG
  712. select HAVE_CLK
  713. select HAVE_S3C2410_I2C if I2C
  714. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  715. select HAVE_S3C_RTC if RTC_CLASS
  716. select NEED_MACH_GPIO_H
  717. select NEED_MACH_MEMORY_H
  718. select SAMSUNG_ATAGS
  719. help
  720. Samsung S5PV210/S5PC110 series based systems
  721. config ARCH_EXYNOS
  722. bool "Samsung EXYNOS"
  723. select ARCH_HAS_CPUFREQ
  724. select ARCH_HAS_HOLES_MEMORYMODEL
  725. select ARCH_REQUIRE_GPIOLIB
  726. select ARCH_SPARSEMEM_ENABLE
  727. select ARM_GIC
  728. select CLKDEV_LOOKUP
  729. select COMMON_CLK
  730. select CPU_V7
  731. select GENERIC_CLOCKEVENTS
  732. select HAVE_CLK
  733. select HAVE_S3C2410_I2C if I2C
  734. select HAVE_S3C2410_WATCHDOG if WATCHDOG
  735. select HAVE_S3C_RTC if RTC_CLASS
  736. select NEED_MACH_MEMORY_H
  737. select SPARSE_IRQ
  738. select USE_OF
  739. help
  740. Support for SAMSUNG's EXYNOS SoCs (EXYNOS4/5)
  741. config ARCH_SHARK
  742. bool "Shark"
  743. select ARCH_USES_GETTIMEOFFSET
  744. select CPU_SA110
  745. select ISA
  746. select ISA_DMA
  747. select NEED_MACH_MEMORY_H
  748. select PCI
  749. select VIRT_TO_BUS
  750. select ZONE_DMA
  751. help
  752. Support for the StrongARM based Digital DNARD machine, also known
  753. as "Shark" (<http://www.shark-linux.de/shark.html>).
  754. config ARCH_DAVINCI
  755. bool "TI DaVinci"
  756. select ARCH_HAS_HOLES_MEMORYMODEL
  757. select ARCH_REQUIRE_GPIOLIB
  758. select CLKDEV_LOOKUP
  759. select GENERIC_ALLOCATOR
  760. select GENERIC_CLOCKEVENTS
  761. select GENERIC_IRQ_CHIP
  762. select HAVE_IDE
  763. select NEED_MACH_GPIO_H
  764. select TI_PRIV_EDMA
  765. select USE_OF
  766. select ZONE_DMA
  767. help
  768. Support for TI's DaVinci platform.
  769. config ARCH_OMAP1
  770. bool "TI OMAP1"
  771. depends on MMU
  772. select ARCH_HAS_CPUFREQ
  773. select ARCH_HAS_HOLES_MEMORYMODEL
  774. select ARCH_OMAP
  775. select ARCH_REQUIRE_GPIOLIB
  776. select CLKDEV_LOOKUP
  777. select CLKSRC_MMIO
  778. select GENERIC_CLOCKEVENTS
  779. select GENERIC_IRQ_CHIP
  780. select HAVE_CLK
  781. select HAVE_IDE
  782. select IRQ_DOMAIN
  783. select NEED_MACH_IO_H if PCCARD
  784. select NEED_MACH_MEMORY_H
  785. help
  786. Support for older TI OMAP1 (omap7xx, omap15xx or omap16xx)
  787. endchoice
  788. menu "Multiple platform selection"
  789. depends on ARCH_MULTIPLATFORM
  790. comment "CPU Core family selection"
  791. config ARCH_MULTI_V4T
  792. bool "ARMv4T based platforms (ARM720T, ARM920T, ...)"
  793. depends on !ARCH_MULTI_V6_V7
  794. select ARCH_MULTI_V4_V5
  795. select CPU_ARM920T if !(CPU_ARM7TDMI || CPU_ARM720T || \
  796. CPU_ARM740T || CPU_ARM9TDMI || CPU_ARM922T || \
  797. CPU_ARM925T || CPU_ARM940T)
  798. config ARCH_MULTI_V5
  799. bool "ARMv5 based platforms (ARM926T, XSCALE, PJ1, ...)"
  800. depends on !ARCH_MULTI_V6_V7
  801. select ARCH_MULTI_V4_V5
  802. select CPU_ARM926T if (!CPU_ARM946E || CPU_ARM1020 || \
  803. CPU_ARM1020E || CPU_ARM1022 || CPU_ARM1026 || \
  804. CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_FEROCEON)
  805. config ARCH_MULTI_V4_V5
  806. bool
  807. config ARCH_MULTI_V6
  808. bool "ARMv6 based platforms (ARM11)"
  809. select ARCH_MULTI_V6_V7
  810. select CPU_V6
  811. config ARCH_MULTI_V7
  812. bool "ARMv7 based platforms (Cortex-A, PJ4, Scorpion, Krait)"
  813. default y
  814. select ARCH_MULTI_V6_V7
  815. select CPU_V7
  816. config ARCH_MULTI_V6_V7
  817. bool
  818. config ARCH_MULTI_CPU_AUTO
  819. def_bool !(ARCH_MULTI_V4 || ARCH_MULTI_V4T || ARCH_MULTI_V6_V7)
  820. select ARCH_MULTI_V5
  821. endmenu
  822. #
  823. # This is sorted alphabetically by mach-* pathname. However, plat-*
  824. # Kconfigs may be included either alphabetically (according to the
  825. # plat- suffix) or along side the corresponding mach-* source.
  826. #
  827. source "arch/arm/mach-mvebu/Kconfig"
  828. source "arch/arm/mach-at91/Kconfig"
  829. source "arch/arm/mach-bcm/Kconfig"
  830. source "arch/arm/mach-bcm2835/Kconfig"
  831. source "arch/arm/mach-clps711x/Kconfig"
  832. source "arch/arm/mach-cns3xxx/Kconfig"
  833. source "arch/arm/mach-davinci/Kconfig"
  834. source "arch/arm/mach-dove/Kconfig"
  835. source "arch/arm/mach-ep93xx/Kconfig"
  836. source "arch/arm/mach-footbridge/Kconfig"
  837. source "arch/arm/mach-gemini/Kconfig"
  838. source "arch/arm/mach-highbank/Kconfig"
  839. source "arch/arm/mach-integrator/Kconfig"
  840. source "arch/arm/mach-iop32x/Kconfig"
  841. source "arch/arm/mach-iop33x/Kconfig"
  842. source "arch/arm/mach-iop13xx/Kconfig"
  843. source "arch/arm/mach-ixp4xx/Kconfig"
  844. source "arch/arm/mach-keystone/Kconfig"
  845. source "arch/arm/mach-kirkwood/Kconfig"
  846. source "arch/arm/mach-ks8695/Kconfig"
  847. source "arch/arm/mach-msm/Kconfig"
  848. source "arch/arm/mach-mv78xx0/Kconfig"
  849. source "arch/arm/mach-imx/Kconfig"
  850. source "arch/arm/mach-mxs/Kconfig"
  851. source "arch/arm/mach-netx/Kconfig"
  852. source "arch/arm/mach-nomadik/Kconfig"
  853. source "arch/arm/mach-nspire/Kconfig"
  854. source "arch/arm/plat-omap/Kconfig"
  855. source "arch/arm/mach-omap1/Kconfig"
  856. source "arch/arm/mach-omap2/Kconfig"
  857. source "arch/arm/mach-orion5x/Kconfig"
  858. source "arch/arm/mach-picoxcell/Kconfig"
  859. source "arch/arm/mach-pxa/Kconfig"
  860. source "arch/arm/plat-pxa/Kconfig"
  861. source "arch/arm/mach-mmp/Kconfig"
  862. source "arch/arm/mach-realview/Kconfig"
  863. source "arch/arm/mach-rockchip/Kconfig"
  864. source "arch/arm/mach-sa1100/Kconfig"
  865. source "arch/arm/plat-samsung/Kconfig"
  866. source "arch/arm/mach-socfpga/Kconfig"
  867. source "arch/arm/mach-spear/Kconfig"
  868. source "arch/arm/mach-sti/Kconfig"
  869. source "arch/arm/mach-s3c24xx/Kconfig"
  870. if ARCH_S3C64XX
  871. source "arch/arm/mach-s3c64xx/Kconfig"
  872. endif
  873. source "arch/arm/mach-s5p64x0/Kconfig"
  874. source "arch/arm/mach-s5pc100/Kconfig"
  875. source "arch/arm/mach-s5pv210/Kconfig"
  876. source "arch/arm/mach-exynos/Kconfig"
  877. source "arch/arm/mach-shmobile/Kconfig"
  878. source "arch/arm/mach-sunxi/Kconfig"
  879. source "arch/arm/mach-prima2/Kconfig"
  880. source "arch/arm/mach-tegra/Kconfig"
  881. source "arch/arm/mach-u300/Kconfig"
  882. source "arch/arm/mach-ux500/Kconfig"
  883. source "arch/arm/mach-versatile/Kconfig"
  884. source "arch/arm/mach-vexpress/Kconfig"
  885. source "arch/arm/plat-versatile/Kconfig"
  886. source "arch/arm/mach-virt/Kconfig"
  887. source "arch/arm/mach-vt8500/Kconfig"
  888. source "arch/arm/mach-w90x900/Kconfig"
  889. source "arch/arm/mach-zynq/Kconfig"
  890. # Definitions to make life easier
  891. config ARCH_ACORN
  892. bool
  893. config PLAT_IOP
  894. bool
  895. select GENERIC_CLOCKEVENTS
  896. config PLAT_ORION
  897. bool
  898. select CLKSRC_MMIO
  899. select COMMON_CLK
  900. select GENERIC_IRQ_CHIP
  901. select IRQ_DOMAIN
  902. config PLAT_ORION_LEGACY
  903. bool
  904. select PLAT_ORION
  905. config PLAT_PXA
  906. bool
  907. config PLAT_VERSATILE
  908. bool
  909. config ARM_TIMER_SP804
  910. bool
  911. select CLKSRC_MMIO
  912. select CLKSRC_OF if OF
  913. source arch/arm/mm/Kconfig
  914. config ARM_NR_BANKS
  915. int
  916. default 16 if ARCH_EP93XX
  917. default 8
  918. config IWMMXT
  919. bool "Enable iWMMXt support" if !CPU_PJ4
  920. depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
  921. default y if PXA27x || PXA3xx || ARCH_MMP || CPU_PJ4
  922. help
  923. Enable support for iWMMXt context switching at run time if
  924. running on a CPU that supports it.
  925. config XSCALE_PMU
  926. bool
  927. depends on CPU_XSCALE
  928. default y
  929. config MULTI_IRQ_HANDLER
  930. bool
  931. help
  932. Allow each machine to specify it's own IRQ handler at run time.
  933. if !MMU
  934. source "arch/arm/Kconfig-nommu"
  935. endif
  936. config PJ4B_ERRATA_4742
  937. bool "PJ4B Errata 4742: IDLE Wake Up Commands can Cause the CPU Core to Cease Operation"
  938. depends on CPU_PJ4B && MACH_ARMADA_370
  939. default y
  940. help
  941. When coming out of either a Wait for Interrupt (WFI) or a Wait for
  942. Event (WFE) IDLE states, a specific timing sensitivity exists between
  943. the retiring WFI/WFE instructions and the newly issued subsequent
  944. instructions. This sensitivity can result in a CPU hang scenario.
  945. Workaround:
  946. The software must insert either a Data Synchronization Barrier (DSB)
  947. or Data Memory Barrier (DMB) command immediately after the WFI/WFE
  948. instruction
  949. config ARM_ERRATA_326103
  950. bool "ARM errata: FSR write bit incorrect on a SWP to read-only memory"
  951. depends on CPU_V6
  952. help
  953. Executing a SWP instruction to read-only memory does not set bit 11
  954. of the FSR on the ARM 1136 prior to r1p0. This causes the kernel to
  955. treat the access as a read, preventing a COW from occurring and
  956. causing the faulting task to livelock.
  957. config ARM_ERRATA_411920
  958. bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
  959. depends on CPU_V6 || CPU_V6K
  960. help
  961. Invalidation of the Instruction Cache operation can
  962. fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
  963. It does not affect the MPCore. This option enables the ARM Ltd.
  964. recommended workaround.
  965. config ARM_ERRATA_430973
  966. bool "ARM errata: Stale prediction on replaced interworking branch"
  967. depends on CPU_V7
  968. help
  969. This option enables the workaround for the 430973 Cortex-A8
  970. (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
  971. interworking branch is replaced with another code sequence at the
  972. same virtual address, whether due to self-modifying code or virtual
  973. to physical address re-mapping, Cortex-A8 does not recover from the
  974. stale interworking branch prediction. This results in Cortex-A8
  975. executing the new code sequence in the incorrect ARM or Thumb state.
  976. The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
  977. and also flushes the branch target cache at every context switch.
  978. Note that setting specific bits in the ACTLR register may not be
  979. available in non-secure mode.
  980. config ARM_ERRATA_458693
  981. bool "ARM errata: Processor deadlock when a false hazard is created"
  982. depends on CPU_V7
  983. depends on !ARCH_MULTIPLATFORM
  984. help
  985. This option enables the workaround for the 458693 Cortex-A8 (r2p0)
  986. erratum. For very specific sequences of memory operations, it is
  987. possible for a hazard condition intended for a cache line to instead
  988. be incorrectly associated with a different cache line. This false
  989. hazard might then cause a processor deadlock. The workaround enables
  990. the L1 caching of the NEON accesses and disables the PLD instruction
  991. in the ACTLR register. Note that setting specific bits in the ACTLR
  992. register may not be available in non-secure mode.
  993. config ARM_ERRATA_460075
  994. bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
  995. depends on CPU_V7
  996. depends on !ARCH_MULTIPLATFORM
  997. help
  998. This option enables the workaround for the 460075 Cortex-A8 (r2p0)
  999. erratum. Any asynchronous access to the L2 cache may encounter a
  1000. situation in which recent store transactions to the L2 cache are lost
  1001. and overwritten with stale memory contents from external memory. The
  1002. workaround disables the write-allocate mode for the L2 cache via the
  1003. ACTLR register. Note that setting specific bits in the ACTLR register
  1004. may not be available in non-secure mode.
  1005. config ARM_ERRATA_742230
  1006. bool "ARM errata: DMB operation may be faulty"
  1007. depends on CPU_V7 && SMP
  1008. depends on !ARCH_MULTIPLATFORM
  1009. help
  1010. This option enables the workaround for the 742230 Cortex-A9
  1011. (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
  1012. between two write operations may not ensure the correct visibility
  1013. ordering of the two writes. This workaround sets a specific bit in
  1014. the diagnostic register of the Cortex-A9 which causes the DMB
  1015. instruction to behave as a DSB, ensuring the correct behaviour of
  1016. the two writes.
  1017. config ARM_ERRATA_742231
  1018. bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
  1019. depends on CPU_V7 && SMP
  1020. depends on !ARCH_MULTIPLATFORM
  1021. help
  1022. This option enables the workaround for the 742231 Cortex-A9
  1023. (r2p0..r2p2) erratum. Under certain conditions, specific to the
  1024. Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
  1025. accessing some data located in the same cache line, may get corrupted
  1026. data due to bad handling of the address hazard when the line gets
  1027. replaced from one of the CPUs at the same time as another CPU is
  1028. accessing it. This workaround sets specific bits in the diagnostic
  1029. register of the Cortex-A9 which reduces the linefill issuing
  1030. capabilities of the processor.
  1031. config PL310_ERRATA_588369
  1032. bool "PL310 errata: Clean & Invalidate maintenance operations do not invalidate clean lines"
  1033. depends on CACHE_L2X0
  1034. help
  1035. The PL310 L2 cache controller implements three types of Clean &
  1036. Invalidate maintenance operations: by Physical Address
  1037. (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
  1038. They are architecturally defined to behave as the execution of a
  1039. clean operation followed immediately by an invalidate operation,
  1040. both performing to the same memory location. This functionality
  1041. is not correctly implemented in PL310 as clean lines are not
  1042. invalidated as a result of these operations.
  1043. config ARM_ERRATA_643719
  1044. bool "ARM errata: LoUIS bit field in CLIDR register is incorrect"
  1045. depends on CPU_V7 && SMP
  1046. help
  1047. This option enables the workaround for the 643719 Cortex-A9 (prior to
  1048. r1p0) erratum. On affected cores the LoUIS bit field of the CLIDR
  1049. register returns zero when it should return one. The workaround
  1050. corrects this value, ensuring cache maintenance operations which use
  1051. it behave as intended and avoiding data corruption.
  1052. config ARM_ERRATA_720789
  1053. bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
  1054. depends on CPU_V7
  1055. help
  1056. This option enables the workaround for the 720789 Cortex-A9 (prior to
  1057. r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
  1058. broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
  1059. As a consequence of this erratum, some TLB entries which should be
  1060. invalidated are not, resulting in an incoherency in the system page
  1061. tables. The workaround changes the TLB flushing routines to invalidate
  1062. entries regardless of the ASID.
  1063. config PL310_ERRATA_727915
  1064. bool "PL310 errata: Background Clean & Invalidate by Way operation can cause data corruption"
  1065. depends on CACHE_L2X0
  1066. help
  1067. PL310 implements the Clean & Invalidate by Way L2 cache maintenance
  1068. operation (offset 0x7FC). This operation runs in background so that
  1069. PL310 can handle normal accesses while it is in progress. Under very
  1070. rare circumstances, due to this erratum, write data can be lost when
  1071. PL310 treats a cacheable write transaction during a Clean &
  1072. Invalidate by Way operation.
  1073. config ARM_ERRATA_743622
  1074. bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
  1075. depends on CPU_V7
  1076. depends on !ARCH_MULTIPLATFORM
  1077. help
  1078. This option enables the workaround for the 743622 Cortex-A9
  1079. (r2p*) erratum. Under very rare conditions, a faulty
  1080. optimisation in the Cortex-A9 Store Buffer may lead to data
  1081. corruption. This workaround sets a specific bit in the diagnostic
  1082. register of the Cortex-A9 which disables the Store Buffer
  1083. optimisation, preventing the defect from occurring. This has no
  1084. visible impact on the overall performance or power consumption of the
  1085. processor.
  1086. config ARM_ERRATA_751472
  1087. bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
  1088. depends on CPU_V7
  1089. depends on !ARCH_MULTIPLATFORM
  1090. help
  1091. This option enables the workaround for the 751472 Cortex-A9 (prior
  1092. to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
  1093. completion of a following broadcasted operation if the second
  1094. operation is received by a CPU before the ICIALLUIS has completed,
  1095. potentially leading to corrupted entries in the cache or TLB.
  1096. config PL310_ERRATA_753970
  1097. bool "PL310 errata: cache sync operation may be faulty"
  1098. depends on CACHE_PL310
  1099. help
  1100. This option enables the workaround for the 753970 PL310 (r3p0) erratum.
  1101. Under some condition the effect of cache sync operation on
  1102. the store buffer still remains when the operation completes.
  1103. This means that the store buffer is always asked to drain and
  1104. this prevents it from merging any further writes. The workaround
  1105. is to replace the normal offset of cache sync operation (0x730)
  1106. by another offset targeting an unmapped PL310 register 0x740.
  1107. This has the same effect as the cache sync operation: store buffer
  1108. drain and waiting for all buffers empty.
  1109. config ARM_ERRATA_754322
  1110. bool "ARM errata: possible faulty MMU translations following an ASID switch"
  1111. depends on CPU_V7
  1112. help
  1113. This option enables the workaround for the 754322 Cortex-A9 (r2p*,
  1114. r3p*) erratum. A speculative memory access may cause a page table walk
  1115. which starts prior to an ASID switch but completes afterwards. This
  1116. can populate the micro-TLB with a stale entry which may be hit with
  1117. the new ASID. This workaround places two dsb instructions in the mm
  1118. switching code so that no page table walks can cross the ASID switch.
  1119. config ARM_ERRATA_754327
  1120. bool "ARM errata: no automatic Store Buffer drain"
  1121. depends on CPU_V7 && SMP
  1122. help
  1123. This option enables the workaround for the 754327 Cortex-A9 (prior to
  1124. r2p0) erratum. The Store Buffer does not have any automatic draining
  1125. mechanism and therefore a livelock may occur if an external agent
  1126. continuously polls a memory location waiting to observe an update.
  1127. This workaround defines cpu_relax() as smp_mb(), preventing correctly
  1128. written polling loops from denying visibility of updates to memory.
  1129. config ARM_ERRATA_364296
  1130. bool "ARM errata: Possible cache data corruption with hit-under-miss enabled"
  1131. depends on CPU_V6
  1132. help
  1133. This options enables the workaround for the 364296 ARM1136
  1134. r0p2 erratum (possible cache data corruption with
  1135. hit-under-miss enabled). It sets the undocumented bit 31 in
  1136. the auxiliary control register and the FI bit in the control
  1137. register, thus disabling hit-under-miss without putting the
  1138. processor into full low interrupt latency mode. ARM11MPCore
  1139. is not affected.
  1140. config ARM_ERRATA_764369
  1141. bool "ARM errata: Data cache line maintenance operation by MVA may not succeed"
  1142. depends on CPU_V7 && SMP
  1143. help
  1144. This option enables the workaround for erratum 764369
  1145. affecting Cortex-A9 MPCore with two or more processors (all
  1146. current revisions). Under certain timing circumstances, a data
  1147. cache line maintenance operation by MVA targeting an Inner
  1148. Shareable memory region may fail to proceed up to either the
  1149. Point of Coherency or to the Point of Unification of the
  1150. system. This workaround adds a DSB instruction before the
  1151. relevant cache maintenance functions and sets a specific bit
  1152. in the diagnostic control register of the SCU.
  1153. config PL310_ERRATA_769419
  1154. bool "PL310 errata: no automatic Store Buffer drain"
  1155. depends on CACHE_L2X0
  1156. help
  1157. On revisions of the PL310 prior to r3p2, the Store Buffer does
  1158. not automatically drain. This can cause normal, non-cacheable
  1159. writes to be retained when the memory system is idle, leading
  1160. to suboptimal I/O performance for drivers using coherent DMA.
  1161. This option adds a write barrier to the cpu_idle loop so that,
  1162. on systems with an outer cache, the store buffer is drained
  1163. explicitly.
  1164. config ARM_ERRATA_775420
  1165. bool "ARM errata: A data cache maintenance operation which aborts, might lead to deadlock"
  1166. depends on CPU_V7
  1167. help
  1168. This option enables the workaround for the 775420 Cortex-A9 (r2p2,
  1169. r2p6,r2p8,r2p10,r3p0) erratum. In case a date cache maintenance
  1170. operation aborts with MMU exception, it might cause the processor
  1171. to deadlock. This workaround puts DSB before executing ISB if
  1172. an abort may occur on cache maintenance.
  1173. config ARM_ERRATA_798181
  1174. bool "ARM errata: TLBI/DSB failure on Cortex-A15"
  1175. depends on CPU_V7 && SMP
  1176. help
  1177. On Cortex-A15 (r0p0..r3p2) the TLBI*IS/DSB operations are not
  1178. adequately shooting down all use of the old entries. This
  1179. option enables the Linux kernel workaround for this erratum
  1180. which sends an IPI to the CPUs that are running the same ASID
  1181. as the one being invalidated.
  1182. config ARM_ERRATA_773022
  1183. bool "ARM errata: incorrect instructions may be executed from loop buffer"
  1184. depends on CPU_V7
  1185. help
  1186. This option enables the workaround for the 773022 Cortex-A15
  1187. (up to r0p4) erratum. In certain rare sequences of code, the
  1188. loop buffer may deliver incorrect instructions. This
  1189. workaround disables the loop buffer to avoid the erratum.
  1190. endmenu
  1191. source "arch/arm/common/Kconfig"
  1192. menu "Bus support"
  1193. config ARM_AMBA
  1194. bool
  1195. config ISA
  1196. bool
  1197. help
  1198. Find out whether you have ISA slots on your motherboard. ISA is the
  1199. name of a bus system, i.e. the way the CPU talks to the other stuff
  1200. inside your box. Other bus systems are PCI, EISA, MicroChannel
  1201. (MCA) or VESA. ISA is an older system, now being displaced by PCI;
  1202. newer boards don't support it. If you have ISA, say Y, otherwise N.
  1203. # Select ISA DMA controller support
  1204. config ISA_DMA
  1205. bool
  1206. select ISA_DMA_API
  1207. # Select ISA DMA interface
  1208. config ISA_DMA_API
  1209. bool
  1210. config PCI
  1211. bool "PCI support" if MIGHT_HAVE_PCI
  1212. help
  1213. Find out whether you have a PCI motherboard. PCI is the name of a
  1214. bus system, i.e. the way the CPU talks to the other stuff inside
  1215. your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
  1216. VESA. If you have PCI, say Y, otherwise N.
  1217. config PCI_DOMAINS
  1218. bool
  1219. depends on PCI
  1220. config PCI_NANOENGINE
  1221. bool "BSE nanoEngine PCI support"
  1222. depends on SA1100_NANOENGINE
  1223. help
  1224. Enable PCI on the BSE nanoEngine board.
  1225. config PCI_SYSCALL
  1226. def_bool PCI
  1227. # Select the host bridge type
  1228. config PCI_HOST_VIA82C505
  1229. bool
  1230. depends on PCI && ARCH_SHARK
  1231. default y
  1232. config PCI_HOST_ITE8152
  1233. bool
  1234. depends on PCI && MACH_ARMCORE
  1235. default y
  1236. select DMABOUNCE
  1237. source "drivers/pci/Kconfig"
  1238. source "drivers/pci/pcie/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 || ARM_MPU
  1255. select USE_GENERIC_SMP_HELPERS
  1256. help
  1257. This enables support for systems with more than one CPU. If you have
  1258. a system with only one CPU, like most personal computers, say N. If
  1259. you have a system with more than one CPU, say Y.
  1260. If you say N here, the kernel will run on single and multiprocessor
  1261. machines, but will use only one CPU of a multiprocessor machine. If
  1262. you say Y here, the kernel will run on many, but not all, single
  1263. processor machines. On a single processor machine, the kernel will
  1264. run faster if you say N here.
  1265. See also <file:Documentation/x86/i386/IO-APIC.txt>,
  1266. <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
  1267. <http://tldp.org/HOWTO/SMP-HOWTO.html>.
  1268. If you don't know what to do here, say N.
  1269. config SMP_ON_UP
  1270. bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
  1271. depends on SMP && !XIP_KERNEL && MMU
  1272. default y
  1273. help
  1274. SMP kernels contain instructions which fail on non-SMP processors.
  1275. Enabling this option allows the kernel to modify itself to make
  1276. these instructions safe. Disabling it allows about 1K of space
  1277. savings.
  1278. If you don't know what to do here, say Y.
  1279. config ARM_CPU_TOPOLOGY
  1280. bool "Support cpu topology definition"
  1281. depends on SMP && CPU_V7
  1282. default y
  1283. help
  1284. Support ARM cpu topology definition. The MPIDR register defines
  1285. affinity between processors which is then used to describe the cpu
  1286. topology of an ARM System.
  1287. config SCHED_MC
  1288. bool "Multi-core scheduler support"
  1289. depends on ARM_CPU_TOPOLOGY
  1290. help
  1291. Multi-core scheduler support improves the CPU scheduler's decision
  1292. making when dealing with multi-core CPU chips at a cost of slightly
  1293. increased overhead in some places. If unsure say N here.
  1294. config SCHED_SMT
  1295. bool "SMT scheduler support"
  1296. depends on ARM_CPU_TOPOLOGY
  1297. help
  1298. Improves the CPU scheduler's decision making when dealing with
  1299. MultiThreading at a cost of slightly increased overhead in some
  1300. places. If unsure say N here.
  1301. config HAVE_ARM_SCU
  1302. bool
  1303. help
  1304. This option enables support for the ARM system coherency unit
  1305. config HAVE_ARM_ARCH_TIMER
  1306. bool "Architected timer support"
  1307. depends on CPU_V7
  1308. select ARM_ARCH_TIMER
  1309. help
  1310. This option enables support for the ARM architected timer
  1311. config HAVE_ARM_TWD
  1312. bool
  1313. depends on SMP
  1314. select CLKSRC_OF if OF
  1315. help
  1316. This options enables support for the ARM timer and watchdog unit
  1317. config MCPM
  1318. bool "Multi-Cluster Power Management"
  1319. depends on CPU_V7 && SMP
  1320. help
  1321. This option provides the common power management infrastructure
  1322. for (multi-)cluster based systems, such as big.LITTLE based
  1323. systems.
  1324. choice
  1325. prompt "Memory split"
  1326. default VMSPLIT_3G
  1327. help
  1328. Select the desired split between kernel and user memory.
  1329. If you are not absolutely sure what you are doing, leave this
  1330. option alone!
  1331. config VMSPLIT_3G
  1332. bool "3G/1G user/kernel split"
  1333. config VMSPLIT_2G
  1334. bool "2G/2G user/kernel split"
  1335. config VMSPLIT_1G
  1336. bool "1G/3G user/kernel split"
  1337. endchoice
  1338. config PAGE_OFFSET
  1339. hex
  1340. default 0x40000000 if VMSPLIT_1G
  1341. default 0x80000000 if VMSPLIT_2G
  1342. default 0xC0000000
  1343. config NR_CPUS
  1344. int "Maximum number of CPUs (2-32)"
  1345. range 2 32
  1346. depends on SMP
  1347. default "4"
  1348. config HOTPLUG_CPU
  1349. bool "Support for hot-pluggable CPUs"
  1350. depends on SMP
  1351. help
  1352. Say Y here to experiment with turning CPUs off and on. CPUs
  1353. can be controlled through /sys/devices/system/cpu.
  1354. config ARM_PSCI
  1355. bool "Support for the ARM Power State Coordination Interface (PSCI)"
  1356. depends on CPU_V7
  1357. help
  1358. Say Y here if you want Linux to communicate with system firmware
  1359. implementing the PSCI specification for CPU-centric power
  1360. management operations described in ARM document number ARM DEN
  1361. 0022A ("Power State Coordination Interface System Software on
  1362. ARM processors").
  1363. # The GPIO number here must be sorted by descending number. In case of
  1364. # a multiplatform kernel, we just want the highest value required by the
  1365. # selected platforms.
  1366. config ARCH_NR_GPIO
  1367. int
  1368. default 1024 if ARCH_SHMOBILE || ARCH_TEGRA
  1369. default 512 if ARCH_EXYNOS || ARCH_KEYSTONE || SOC_OMAP5 || SOC_DRA7XX
  1370. default 392 if ARCH_U8500
  1371. default 352 if ARCH_VT8500
  1372. default 288 if ARCH_SUNXI
  1373. default 264 if MACH_H4700
  1374. default 0
  1375. help
  1376. Maximum number of GPIOs in the system.
  1377. If unsure, leave the default value.
  1378. source kernel/Kconfig.preempt
  1379. config HZ_FIXED
  1380. int
  1381. default 200 if ARCH_EBSA110 || ARCH_S3C24XX || ARCH_S5P64X0 || \
  1382. ARCH_S5PV210 || ARCH_EXYNOS4
  1383. default AT91_TIMER_HZ if ARCH_AT91
  1384. default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
  1385. default 0
  1386. choice
  1387. depends on HZ_FIXED = 0
  1388. prompt "Timer frequency"
  1389. config HZ_100
  1390. bool "100 Hz"
  1391. config HZ_200
  1392. bool "200 Hz"
  1393. config HZ_250
  1394. bool "250 Hz"
  1395. config HZ_300
  1396. bool "300 Hz"
  1397. config HZ_500
  1398. bool "500 Hz"
  1399. config HZ_1000
  1400. bool "1000 Hz"
  1401. endchoice
  1402. config HZ
  1403. int
  1404. default HZ_FIXED if HZ_FIXED != 0
  1405. default 100 if HZ_100
  1406. default 200 if HZ_200
  1407. default 250 if HZ_250
  1408. default 300 if HZ_300
  1409. default 500 if HZ_500
  1410. default 1000
  1411. config SCHED_HRTICK
  1412. def_bool HIGH_RES_TIMERS
  1413. config SCHED_HRTICK
  1414. def_bool HIGH_RES_TIMERS
  1415. config THUMB2_KERNEL
  1416. bool "Compile the kernel in Thumb-2 mode" if !CPU_THUMBONLY
  1417. depends on (CPU_V7 || CPU_V7M) && !CPU_V6 && !CPU_V6K
  1418. default y if CPU_THUMBONLY
  1419. select AEABI
  1420. select ARM_ASM_UNIFIED
  1421. select ARM_UNWIND
  1422. help
  1423. By enabling this option, the kernel will be compiled in
  1424. Thumb-2 mode. A compiler/assembler that understand the unified
  1425. ARM-Thumb syntax is needed.
  1426. If unsure, say N.
  1427. config THUMB2_AVOID_R_ARM_THM_JUMP11
  1428. bool "Work around buggy Thumb-2 short branch relocations in gas"
  1429. depends on THUMB2_KERNEL && MODULES
  1430. default y
  1431. help
  1432. Various binutils versions can resolve Thumb-2 branches to
  1433. locally-defined, preemptible global symbols as short-range "b.n"
  1434. branch instructions.
  1435. This is a problem, because there's no guarantee the final
  1436. destination of the symbol, or any candidate locations for a
  1437. trampoline, are within range of the branch. For this reason, the
  1438. kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
  1439. relocation in modules at all, and it makes little sense to add
  1440. support.
  1441. The symptom is that the kernel fails with an "unsupported
  1442. relocation" error when loading some modules.
  1443. Until fixed tools are available, passing
  1444. -fno-optimize-sibling-calls to gcc should prevent gcc generating
  1445. code which hits this problem, at the cost of a bit of extra runtime
  1446. stack usage in some cases.
  1447. The problem is described in more detail at:
  1448. https://bugs.launchpad.net/binutils-linaro/+bug/725126
  1449. Only Thumb-2 kernels are affected.
  1450. Unless you are sure your tools don't have this problem, say Y.
  1451. config ARM_ASM_UNIFIED
  1452. bool
  1453. config AEABI
  1454. bool "Use the ARM EABI to compile the kernel"
  1455. help
  1456. This option allows for the kernel to be compiled using the latest
  1457. ARM ABI (aka EABI). This is only useful if you are using a user
  1458. space environment that is also compiled with EABI.
  1459. Since there are major incompatibilities between the legacy ABI and
  1460. EABI, especially with regard to structure member alignment, this
  1461. option also changes the kernel syscall calling convention to
  1462. disambiguate both ABIs and allow for backward compatibility support
  1463. (selected with CONFIG_OABI_COMPAT).
  1464. To use this you need GCC version 4.0.0 or later.
  1465. config OABI_COMPAT
  1466. bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
  1467. depends on AEABI && !THUMB2_KERNEL
  1468. default y
  1469. help
  1470. This option preserves the old syscall interface along with the
  1471. new (ARM EABI) one. It also provides a compatibility layer to
  1472. intercept syscalls that have structure arguments which layout
  1473. in memory differs between the legacy ABI and the new ARM EABI
  1474. (only for non "thumb" binaries). This option adds a tiny
  1475. overhead to all syscalls and produces a slightly larger kernel.
  1476. If you know you'll be using only pure EABI user space then you
  1477. can say N here. If this option is not selected and you attempt
  1478. to execute a legacy ABI binary then the result will be
  1479. UNPREDICTABLE (in fact it can be predicted that it won't work
  1480. at all). If in doubt say Y.
  1481. config ARCH_HAS_HOLES_MEMORYMODEL
  1482. bool
  1483. config ARCH_SPARSEMEM_ENABLE
  1484. bool
  1485. config ARCH_SPARSEMEM_DEFAULT
  1486. def_bool ARCH_SPARSEMEM_ENABLE
  1487. config ARCH_SELECT_MEMORY_MODEL
  1488. def_bool ARCH_SPARSEMEM_ENABLE
  1489. config HAVE_ARCH_PFN_VALID
  1490. def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
  1491. config HIGHMEM
  1492. bool "High Memory Support"
  1493. depends on MMU
  1494. help
  1495. The address space of ARM processors is only 4 Gigabytes large
  1496. and it has to accommodate user address space, kernel address
  1497. space as well as some memory mapped IO. That means that, if you
  1498. have a large amount of physical memory and/or IO, not all of the
  1499. memory can be "permanently mapped" by the kernel. The physical
  1500. memory that is not permanently mapped is called "high memory".
  1501. Depending on the selected kernel/user memory split, minimum
  1502. vmalloc space and actual amount of RAM, you may not need this
  1503. option which should result in a slightly faster kernel.
  1504. If unsure, say n.
  1505. config HIGHPTE
  1506. bool "Allocate 2nd-level pagetables from highmem"
  1507. depends on HIGHMEM
  1508. config HW_PERF_EVENTS
  1509. bool "Enable hardware performance counter support for perf events"
  1510. depends on PERF_EVENTS
  1511. default y
  1512. help
  1513. Enable hardware performance counter support for perf events. If
  1514. disabled, perf events will use software events only.
  1515. config SYS_SUPPORTS_HUGETLBFS
  1516. def_bool y
  1517. depends on ARM_LPAE
  1518. config HAVE_ARCH_TRANSPARENT_HUGEPAGE
  1519. def_bool y
  1520. depends on ARM_LPAE
  1521. config ARCH_WANT_GENERAL_HUGETLB
  1522. def_bool y
  1523. source "mm/Kconfig"
  1524. config FORCE_MAX_ZONEORDER
  1525. int "Maximum zone order" if ARCH_SHMOBILE
  1526. range 11 64 if ARCH_SHMOBILE
  1527. default "12" if SOC_AM33XX
  1528. default "9" if SA1111
  1529. default "11"
  1530. help
  1531. The kernel memory allocator divides physically contiguous memory
  1532. blocks into "zones", where each zone is a power of two number of
  1533. pages. This option selects the largest power of two that the kernel
  1534. keeps in the memory allocator. If you need to allocate very large
  1535. blocks of physically contiguous memory, then you may need to
  1536. increase this value.
  1537. This config option is actually maximum order plus one. For example,
  1538. a value of 11 means that the largest free memory block is 2^10 pages.
  1539. config ALIGNMENT_TRAP
  1540. bool
  1541. depends on CPU_CP15_MMU
  1542. default y if !ARCH_EBSA110
  1543. select HAVE_PROC_CPU if PROC_FS
  1544. help
  1545. ARM processors cannot fetch/store information which is not
  1546. naturally aligned on the bus, i.e., a 4 byte fetch must start at an
  1547. address divisible by 4. On 32-bit ARM processors, these non-aligned
  1548. fetch/store instructions will be emulated in software if you say
  1549. here, which has a severe performance impact. This is necessary for
  1550. correct operation of some network protocols. With an IP-only
  1551. configuration it is safe to say N, otherwise say Y.
  1552. config UACCESS_WITH_MEMCPY
  1553. bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user()"
  1554. depends on MMU
  1555. default y if CPU_FEROCEON
  1556. help
  1557. Implement faster copy_to_user and clear_user methods for CPU
  1558. cores where a 8-word STM instruction give significantly higher
  1559. memory write throughput than a sequence of individual 32bit stores.
  1560. A possible side effect is a slight increase in scheduling latency
  1561. between threads sharing the same address space if they invoke
  1562. such copy operations with large buffers.
  1563. However, if the CPU data cache is using a write-allocate mode,
  1564. this option is unlikely to provide any performance gain.
  1565. config SECCOMP
  1566. bool
  1567. prompt "Enable seccomp to safely compute untrusted bytecode"
  1568. ---help---
  1569. This kernel feature is useful for number crunching applications
  1570. that may need to compute untrusted bytecode during their
  1571. execution. By using pipes or other transports made available to
  1572. the process as file descriptors supporting the read/write
  1573. syscalls, it's possible to isolate those applications in
  1574. their own address space using seccomp. Once seccomp is
  1575. enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
  1576. and the task is only allowed to execute a few safe syscalls
  1577. defined by each seccomp mode.
  1578. config CC_STACKPROTECTOR
  1579. bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
  1580. help
  1581. This option turns on the -fstack-protector GCC feature. This
  1582. feature puts, at the beginning of functions, a canary value on
  1583. the stack just before the return address, and validates
  1584. the value just before actually returning. Stack based buffer
  1585. overflows (that need to overwrite this return address) now also
  1586. overwrite the canary, which gets detected and the attack is then
  1587. neutralized via a kernel panic.
  1588. This feature requires gcc version 4.2 or above.
  1589. config XEN_DOM0
  1590. def_bool y
  1591. depends on XEN
  1592. config XEN
  1593. bool "Xen guest support on ARM (EXPERIMENTAL)"
  1594. depends on ARM && AEABI && OF
  1595. depends on CPU_V7 && !CPU_V6
  1596. depends on !GENERIC_ATOMIC64
  1597. select ARM_PSCI
  1598. help
  1599. Say Y if you want to run Linux in a Virtual Machine on Xen on ARM.
  1600. endmenu
  1601. menu "Boot options"
  1602. config USE_OF
  1603. bool "Flattened Device Tree support"
  1604. select IRQ_DOMAIN
  1605. select OF
  1606. select OF_EARLY_FLATTREE
  1607. help
  1608. Include support for flattened device tree machine descriptions.
  1609. config ATAGS
  1610. bool "Support for the traditional ATAGS boot data passing" if USE_OF
  1611. default y
  1612. help
  1613. This is the traditional way of passing data to the kernel at boot
  1614. time. If you are solely relying on the flattened device tree (or
  1615. the ARM_ATAG_DTB_COMPAT option) then you may unselect this option
  1616. to remove ATAGS support from your kernel binary. If unsure,
  1617. leave this to y.
  1618. config DEPRECATED_PARAM_STRUCT
  1619. bool "Provide old way to pass kernel parameters"
  1620. depends on ATAGS
  1621. help
  1622. This was deprecated in 2001 and announced to live on for 5 years.
  1623. Some old boot loaders still use this way.
  1624. # Compressed boot loader in ROM. Yes, we really want to ask about
  1625. # TEXT and BSS so we preserve their values in the config files.
  1626. config ZBOOT_ROM_TEXT
  1627. hex "Compressed ROM boot loader base address"
  1628. default "0"
  1629. help
  1630. The physical address at which the ROM-able zImage is to be
  1631. placed in the target. Platforms which normally make use of
  1632. ROM-able zImage formats normally set this to a suitable
  1633. value in their defconfig file.
  1634. If ZBOOT_ROM is not enabled, this has no effect.
  1635. config ZBOOT_ROM_BSS
  1636. hex "Compressed ROM boot loader BSS address"
  1637. default "0"
  1638. help
  1639. The base address of an area of read/write memory in the target
  1640. for the ROM-able zImage which must be available while the
  1641. decompressor is running. It must be large enough to hold the
  1642. entire decompressed kernel plus an additional 128 KiB.
  1643. Platforms which normally make use of ROM-able zImage formats
  1644. normally set this to a suitable value in their defconfig file.
  1645. If ZBOOT_ROM is not enabled, this has no effect.
  1646. config ZBOOT_ROM
  1647. bool "Compressed boot loader in ROM/flash"
  1648. depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
  1649. help
  1650. Say Y here if you intend to execute your compressed kernel image
  1651. (zImage) directly from ROM or flash. If unsure, say N.
  1652. choice
  1653. prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)"
  1654. depends on ZBOOT_ROM && ARCH_SH7372
  1655. default ZBOOT_ROM_NONE
  1656. help
  1657. Include experimental SD/MMC loading code in the ROM-able zImage.
  1658. With this enabled it is possible to write the ROM-able zImage
  1659. kernel image to an MMC or SD card and boot the kernel straight
  1660. from the reset vector. At reset the processor Mask ROM will load
  1661. the first part of the ROM-able zImage which in turn loads the
  1662. rest the kernel image to RAM.
  1663. config ZBOOT_ROM_NONE
  1664. bool "No SD/MMC loader in zImage (EXPERIMENTAL)"
  1665. help
  1666. Do not load image from SD or MMC
  1667. config ZBOOT_ROM_MMCIF
  1668. bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
  1669. help
  1670. Load image from MMCIF hardware block.
  1671. config ZBOOT_ROM_SH_MOBILE_SDHI
  1672. bool "Include SuperH Mobile SDHI loader in zImage (EXPERIMENTAL)"
  1673. help
  1674. Load image from SDHI hardware block
  1675. endchoice
  1676. config ARM_APPENDED_DTB
  1677. bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
  1678. depends on OF && !ZBOOT_ROM
  1679. help
  1680. With this option, the boot code will look for a device tree binary
  1681. (DTB) appended to zImage
  1682. (e.g. cat zImage <filename>.dtb > zImage_w_dtb).
  1683. This is meant as a backward compatibility convenience for those
  1684. systems with a bootloader that can't be upgraded to accommodate
  1685. the documented boot protocol using a device tree.
  1686. Beware that there is very little in terms of protection against
  1687. this option being confused by leftover garbage in memory that might
  1688. look like a DTB header after a reboot if no actual DTB is appended
  1689. to zImage. Do not leave this option active in a production kernel
  1690. if you don't intend to always append a DTB. Proper passing of the
  1691. location into r2 of a bootloader provided DTB is always preferable
  1692. to this option.
  1693. config ARM_ATAG_DTB_COMPAT
  1694. bool "Supplement the appended DTB with traditional ATAG information"
  1695. depends on ARM_APPENDED_DTB
  1696. help
  1697. Some old bootloaders can't be updated to a DTB capable one, yet
  1698. they provide ATAGs with memory configuration, the ramdisk address,
  1699. the kernel cmdline string, etc. Such information is dynamically
  1700. provided by the bootloader and can't always be stored in a static
  1701. DTB. To allow a device tree enabled kernel to be used with such
  1702. bootloaders, this option allows zImage to extract the information
  1703. from the ATAG list and store it at run time into the appended DTB.
  1704. choice
  1705. prompt "Kernel command line type" if ARM_ATAG_DTB_COMPAT
  1706. default ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
  1707. config ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
  1708. bool "Use bootloader kernel arguments if available"
  1709. help
  1710. Uses the command-line options passed by the boot loader instead of
  1711. the device tree bootargs property. If the boot loader doesn't provide
  1712. any, the device tree bootargs property will be used.
  1713. config ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEND
  1714. bool "Extend with bootloader kernel arguments"
  1715. help
  1716. The command-line arguments provided by the boot loader will be
  1717. appended to the the device tree bootargs property.
  1718. endchoice
  1719. config CMDLINE
  1720. string "Default kernel command string"
  1721. default ""
  1722. help
  1723. On some architectures (EBSA110 and CATS), there is currently no way
  1724. for the boot loader to pass arguments to the kernel. For these
  1725. architectures, you should supply some command-line options at build
  1726. time by entering them here. As a minimum, you should specify the
  1727. memory size and the root device (e.g., mem=64M root=/dev/nfs).
  1728. choice
  1729. prompt "Kernel command line type" if CMDLINE != ""
  1730. default CMDLINE_FROM_BOOTLOADER
  1731. depends on ATAGS
  1732. config CMDLINE_FROM_BOOTLOADER
  1733. bool "Use bootloader kernel arguments if available"
  1734. help
  1735. Uses the command-line options passed by the boot loader. If
  1736. the boot loader doesn't provide any, the default kernel command
  1737. string provided in CMDLINE will be used.
  1738. config CMDLINE_EXTEND
  1739. bool "Extend bootloader kernel arguments"
  1740. help
  1741. The command-line arguments provided by the boot loader will be
  1742. appended to the default kernel command string.
  1743. config CMDLINE_FORCE
  1744. bool "Always use the default kernel command string"
  1745. help
  1746. Always use the default kernel command string, even if the boot
  1747. loader passes other arguments to the kernel.
  1748. This is useful if you cannot or don't want to change the
  1749. command-line options your boot loader passes to the kernel.
  1750. endchoice
  1751. config XIP_KERNEL
  1752. bool "Kernel Execute-In-Place from ROM"
  1753. depends on !ZBOOT_ROM && !ARM_LPAE && !ARCH_MULTIPLATFORM
  1754. help
  1755. Execute-In-Place allows the kernel to run from non-volatile storage
  1756. directly addressable by the CPU, such as NOR flash. This saves RAM
  1757. space since the text section of the kernel is not loaded from flash
  1758. to RAM. Read-write sections, such as the data section and stack,
  1759. are still copied to RAM. The XIP kernel is not compressed since
  1760. it has to run directly from flash, so it will take more space to
  1761. store it. The flash address used to link the kernel object files,
  1762. and for storing it, is configuration dependent. Therefore, if you
  1763. say Y here, you must know the proper physical address where to
  1764. store the kernel image depending on your own flash memory usage.
  1765. Also note that the make target becomes "make xipImage" rather than
  1766. "make zImage" or "make Image". The final kernel binary to put in
  1767. ROM memory will be arch/arm/boot/xipImage.
  1768. If unsure, say N.
  1769. config XIP_PHYS_ADDR
  1770. hex "XIP Kernel Physical Location"
  1771. depends on XIP_KERNEL
  1772. default "0x00080000"
  1773. help
  1774. This is the physical address in your flash memory the kernel will
  1775. be linked for and stored to. This address is dependent on your
  1776. own flash usage.
  1777. config KEXEC
  1778. bool "Kexec system call (EXPERIMENTAL)"
  1779. depends on (!SMP || PM_SLEEP_SMP)
  1780. help
  1781. kexec is a system call that implements the ability to shutdown your
  1782. current kernel, and to start another kernel. It is like a reboot
  1783. but it is independent of the system firmware. And like a reboot
  1784. you can start any kernel with it, not just Linux.
  1785. It is an ongoing process to be certain the hardware in a machine
  1786. is properly shutdown, so do not be surprised if this code does not
  1787. initially work for you.
  1788. config ATAGS_PROC
  1789. bool "Export atags in procfs"
  1790. depends on ATAGS && KEXEC
  1791. default y
  1792. help
  1793. Should the atags used to boot the kernel be exported in an "atags"
  1794. file in procfs. Useful with kexec.
  1795. config CRASH_DUMP
  1796. bool "Build kdump crash kernel (EXPERIMENTAL)"
  1797. help
  1798. Generate crash dump after being started by kexec. This should
  1799. be normally only set in special crash dump kernels which are
  1800. loaded in the main kernel with kexec-tools into a specially
  1801. reserved region and then later executed after a crash by
  1802. kdump/kexec. The crash dump kernel must be compiled to a
  1803. memory address not used by the main kernel
  1804. For more details see Documentation/kdump/kdump.txt
  1805. config AUTO_ZRELADDR
  1806. bool "Auto calculation of the decompressed kernel image address"
  1807. depends on !ZBOOT_ROM
  1808. help
  1809. ZRELADDR is the physical address where the decompressed kernel
  1810. image will be placed. If AUTO_ZRELADDR is selected, the address
  1811. will be determined at run-time by masking the current IP with
  1812. 0xf8000000. This assumes the zImage being placed in the first 128MB
  1813. from start of memory.
  1814. endmenu
  1815. menu "CPU Power Management"
  1816. if ARCH_HAS_CPUFREQ
  1817. source "drivers/cpufreq/Kconfig"
  1818. endif
  1819. source "drivers/cpuidle/Kconfig"
  1820. endmenu
  1821. menu "Floating point emulation"
  1822. comment "At least one emulation must be selected"
  1823. config FPE_NWFPE
  1824. bool "NWFPE math emulation"
  1825. depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
  1826. ---help---
  1827. Say Y to include the NWFPE floating point emulator in the kernel.
  1828. This is necessary to run most binaries. Linux does not currently
  1829. support floating point hardware so you need to say Y here even if
  1830. your machine has an FPA or floating point co-processor podule.
  1831. You may say N here if you are going to load the Acorn FPEmulator
  1832. early in the bootup.
  1833. config FPE_NWFPE_XP
  1834. bool "Support extended precision"
  1835. depends on FPE_NWFPE
  1836. help
  1837. Say Y to include 80-bit support in the kernel floating-point
  1838. emulator. Otherwise, only 32 and 64-bit support is compiled in.
  1839. Note that gcc does not generate 80-bit operations by default,
  1840. so in most cases this option only enlarges the size of the
  1841. floating point emulator without any good reason.
  1842. You almost surely want to say N here.
  1843. config FPE_FASTFPE
  1844. bool "FastFPE math emulation (EXPERIMENTAL)"
  1845. depends on (!AEABI || OABI_COMPAT) && !CPU_32v3
  1846. ---help---
  1847. Say Y here to include the FAST floating point emulator in the kernel.
  1848. This is an experimental much faster emulator which now also has full
  1849. precision for the mantissa. It does not support any exceptions.
  1850. It is very simple, and approximately 3-6 times faster than NWFPE.
  1851. It should be sufficient for most programs. It may be not suitable
  1852. for scientific calculations, but you have to check this for yourself.
  1853. If you do not feel you need a faster FP emulation you should better
  1854. choose NWFPE.
  1855. config VFP
  1856. bool "VFP-format floating point maths"
  1857. depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
  1858. help
  1859. Say Y to include VFP support code in the kernel. This is needed
  1860. if your hardware includes a VFP unit.
  1861. Please see <file:Documentation/arm/VFP/release-notes.txt> for
  1862. release notes and additional status information.
  1863. Say N if your target does not have VFP hardware.
  1864. config VFPv3
  1865. bool
  1866. depends on VFP
  1867. default y if CPU_V7
  1868. config NEON
  1869. bool "Advanced SIMD (NEON) Extension support"
  1870. depends on VFPv3 && CPU_V7
  1871. help
  1872. Say Y to include support code for NEON, the ARMv7 Advanced SIMD
  1873. Extension.
  1874. config KERNEL_MODE_NEON
  1875. bool "Support for NEON in kernel mode"
  1876. default n
  1877. depends on NEON
  1878. help
  1879. Say Y to include support for NEON in kernel mode.
  1880. endmenu
  1881. menu "Userspace binary formats"
  1882. source "fs/Kconfig.binfmt"
  1883. config ARTHUR
  1884. tristate "RISC OS personality"
  1885. depends on !AEABI
  1886. help
  1887. Say Y here to include the kernel code necessary if you want to run
  1888. Acorn RISC OS/Arthur binaries under Linux. This code is still very
  1889. experimental; if this sounds frightening, say N and sleep in peace.
  1890. You can also say M here to compile this support as a module (which
  1891. will be called arthur).
  1892. endmenu
  1893. menu "Power management options"
  1894. source "kernel/power/Kconfig"
  1895. config ARCH_SUSPEND_POSSIBLE
  1896. depends on !ARCH_S5PC100
  1897. depends on CPU_ARM920T || CPU_ARM926T || CPU_FEROCEON || CPU_SA1100 || \
  1898. CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE || CPU_MOHAWK
  1899. def_bool y
  1900. config ARM_CPU_SUSPEND
  1901. def_bool PM_SLEEP
  1902. endmenu
  1903. source "net/Kconfig"
  1904. source "drivers/Kconfig"
  1905. source "fs/Kconfig"
  1906. source "arch/arm/Kconfig.debug"
  1907. source "security/Kconfig"
  1908. source "crypto/Kconfig"
  1909. source "lib/Kconfig"
  1910. source "arch/arm/kvm/Kconfig"