xref: /linux/arch/arm/Kconfig (revision 3b8f5030ddcf51112542e1e6ef27da237642069d)
11da177e4SLinus Torvaldsconfig ARM
21da177e4SLinus Torvalds	bool
31da177e4SLinus Torvalds	default y
4b1b3f49cSRussell King	select ARCH_BINFMT_ELF_RANDOMIZE_PIE
57463449bSCatalin Marinas	select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
63d06770eSMark Rutland	select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
7171b3f0dSRussell King	select ARCH_HAVE_CUSTOM_GPIO_H
8d7018848SMark Salter	select ARCH_MIGHT_HAVE_PC_PARPORT
94badad35SPeter Zijlstra	select ARCH_SUPPORTS_ATOMIC_RMW
10017f161aSKim Phillips	select ARCH_USE_BUILTIN_BSWAP
110cbad9c9SWill Deacon	select ARCH_USE_CMPXCHG_LOCKREF
12b1b3f49cSRussell King	select ARCH_WANT_IPC_PARSE_VERSION
13ee951c63SStephen Boyd	select BUILDTIME_EXTABLE_SORT if MMU
14171b3f0dSRussell King	select CLONE_BACKWARDS
15b1b3f49cSRussell King	select CPU_PM if (SUSPEND || CPU_IDLE)
16dce5c9e3SWill Deacon	select DCACHE_WORD_ACCESS if HAVE_EFFICIENT_UNALIGNED_ACCESS
174477ca45SUwe Kleine-König	select GENERIC_ATOMIC64 if (CPU_V7M || CPU_V6 || !CPU_32v6K || !AEABI)
18b1b3f49cSRussell King	select GENERIC_CLOCKEVENTS_BROADCAST if SMP
19171b3f0dSRussell King	select GENERIC_IDLE_POLL_SETUP
20b1b3f49cSRussell King	select GENERIC_IRQ_PROBE
21b1b3f49cSRussell King	select GENERIC_IRQ_SHOW
22b1b3f49cSRussell King	select GENERIC_PCI_IOMAP
2338ff87f7SStephen Boyd	select GENERIC_SCHED_CLOCK
24b1b3f49cSRussell King	select GENERIC_SMP_IDLE_THREAD
25b1b3f49cSRussell King	select GENERIC_STRNCPY_FROM_USER
26b1b3f49cSRussell King	select GENERIC_STRNLEN_USER
27b1b3f49cSRussell King	select HARDIRQS_SW_RESEND
287a017721SAKASHI Takahiro	select HAVE_ARCH_AUDITSYSCALL if (AEABI && !OABI_COMPAT)
2909f05d85SRabin Vincent	select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL
305cbad0ebSJason Wessel	select HAVE_ARCH_KGDB
3191702175SKees Cook	select HAVE_ARCH_SECCOMP_FILTER if (AEABI && !OABI_COMPAT)
320693bf68SWade Farnsworth	select HAVE_ARCH_TRACEHOOK
33b1b3f49cSRussell King	select HAVE_BPF_JIT
3451aaf81fSRussell King	select HAVE_CC_STACKPROTECTOR
35171b3f0dSRussell King	select HAVE_CONTEXT_TRACKING
36b1b3f49cSRussell King	select HAVE_C_RECORDMCOUNT
37b1b3f49cSRussell King	select HAVE_DEBUG_KMEMLEAK
38b1b3f49cSRussell King	select HAVE_DMA_API_DEBUG
39b1b3f49cSRussell King	select HAVE_DMA_ATTRS
40b1b3f49cSRussell King	select HAVE_DMA_CONTIGUOUS if MMU
41b1b3f49cSRussell King	select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL)
42dce5c9e3SWill Deacon	select HAVE_EFFICIENT_UNALIGNED_ACCESS if (CPU_V6 || CPU_V6K || CPU_V7) && MMU
43b1b3f49cSRussell King	select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
44b1b3f49cSRussell King	select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL)
45b1b3f49cSRussell King	select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
46b1b3f49cSRussell King	select HAVE_GENERIC_DMA_COHERENT
47b1b3f49cSRussell King	select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7))
48b1b3f49cSRussell King	select HAVE_IDE if PCI || ISA || PCMCIA
4987c46b6cSRussell King	select HAVE_IRQ_TIME_ACCOUNTING
50b1b3f49cSRussell King	select HAVE_KERNEL_GZIP
51f9b493acSKyungsik Lee	select HAVE_KERNEL_LZ4
52b1b3f49cSRussell King	select HAVE_KERNEL_LZMA
53b1b3f49cSRussell King	select HAVE_KERNEL_LZO
54b1b3f49cSRussell King	select HAVE_KERNEL_XZ
55856bc356SJon Medhurst	select HAVE_KPROBES if !XIP_KERNEL
569edddaa2SAnanth N Mavinakayanahalli	select HAVE_KRETPROBES if (HAVE_KPROBES)
57b1b3f49cSRussell King	select HAVE_MEMBLOCK
58171b3f0dSRussell King	select HAVE_MOD_ARCH_SPECIFIC if ARM_UNWIND
59b1b3f49cSRussell King	select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
607ada189fSJamie Iles	select HAVE_PERF_EVENTS
6149863894SWill Deacon	select HAVE_PERF_REGS
6249863894SWill Deacon	select HAVE_PERF_USER_STACK_DUMP
63e513f8bfSWill Deacon	select HAVE_REGS_AND_STACK_ACCESS_API
64b1b3f49cSRussell King	select HAVE_SYSCALL_TRACEPOINTS
65af1839ebSCatalin Marinas	select HAVE_UID16
6631c1fc81SKevin Hilman	select HAVE_VIRT_CPU_ACCOUNTING_GEN
67da0ec6f7SThomas Gleixner	select IRQ_FORCED_THREADING
68171b3f0dSRussell King	select MODULES_USE_ELF_REL
6984f452b1SSantosh Shilimkar	select NO_BOOTMEM
70171b3f0dSRussell King	select OLD_SIGACTION
71171b3f0dSRussell King	select OLD_SIGSUSPEND3
72b1b3f49cSRussell King	select PERF_USE_VMALLOC
73b1b3f49cSRussell King	select RTC_LIB
74b1b3f49cSRussell King	select SYS_SUPPORTS_APM_EMULATION
75171b3f0dSRussell King	# Above selects are sorted alphabetically; please add new ones
76171b3f0dSRussell King	# according to that.  Thanks.
771da177e4SLinus Torvalds	help
781da177e4SLinus Torvalds	  The ARM series is a line of low-power-consumption RISC chip designs
79f6c8965aSMartin Michlmayr	  licensed by ARM Ltd and targeted at embedded applications and
801da177e4SLinus Torvalds	  handhelds such as the Compaq IPAQ.  ARM-based PCs are no longer
811da177e4SLinus Torvalds	  manufactured, but legacy ARM-based PC hardware remains popular in
821da177e4SLinus Torvalds	  Europe.  There is an ARM Linux project with a web page at
831da177e4SLinus Torvalds	  <http://www.arm.linux.org.uk/>.
841da177e4SLinus Torvalds
8574facffeSRussell Kingconfig ARM_HAS_SG_CHAIN
86308c09f1SLaura Abbott	select ARCH_HAS_SG_CHAIN
8774facffeSRussell King	bool
8874facffeSRussell King
894ce63fcdSMarek Szyprowskiconfig NEED_SG_DMA_LENGTH
904ce63fcdSMarek Szyprowski	bool
914ce63fcdSMarek Szyprowski
924ce63fcdSMarek Szyprowskiconfig ARM_DMA_USE_IOMMU
934ce63fcdSMarek Szyprowski	bool
94b1b3f49cSRussell King	select ARM_HAS_SG_CHAIN
95b1b3f49cSRussell King	select NEED_SG_DMA_LENGTH
964ce63fcdSMarek Szyprowski
9760460abfSSeung-Woo Kimif ARM_DMA_USE_IOMMU
9860460abfSSeung-Woo Kim
9960460abfSSeung-Woo Kimconfig ARM_DMA_IOMMU_ALIGNMENT
10060460abfSSeung-Woo Kim	int "Maximum PAGE_SIZE order of alignment for DMA IOMMU buffers"
10160460abfSSeung-Woo Kim	range 4 9
10260460abfSSeung-Woo Kim	default 8
10360460abfSSeung-Woo Kim	help
10460460abfSSeung-Woo Kim	  DMA mapping framework by default aligns all buffers to the smallest
10560460abfSSeung-Woo Kim	  PAGE_SIZE order which is greater than or equal to the requested buffer
10660460abfSSeung-Woo Kim	  size. This works well for buffers up to a few hundreds kilobytes, but
10760460abfSSeung-Woo Kim	  for larger buffers it just a waste of address space. Drivers which has
10860460abfSSeung-Woo Kim	  relatively small addressing window (like 64Mib) might run out of
10960460abfSSeung-Woo Kim	  virtual space with just a few allocations.
11060460abfSSeung-Woo Kim
11160460abfSSeung-Woo Kim	  With this parameter you can specify the maximum PAGE_SIZE order for
11260460abfSSeung-Woo Kim	  DMA IOMMU buffers. Larger buffers will be aligned only to this
11360460abfSSeung-Woo Kim	  specified order. The order is expressed as a power of two multiplied
11460460abfSSeung-Woo Kim	  by the PAGE_SIZE.
11560460abfSSeung-Woo Kim
11660460abfSSeung-Woo Kimendif
11760460abfSSeung-Woo Kim
1180b05da72SHans Ulli Krollconfig MIGHT_HAVE_PCI
1190b05da72SHans Ulli Kroll	bool
1200b05da72SHans Ulli Kroll
12175e7153aSRalf Baechleconfig SYS_SUPPORTS_APM_EMULATION
12275e7153aSRalf Baechle	bool
12375e7153aSRalf Baechle
124bc581770SLinus Walleijconfig HAVE_TCM
125bc581770SLinus Walleij	bool
126bc581770SLinus Walleij	select GENERIC_ALLOCATOR
127bc581770SLinus Walleij
128e119bfffSRussell Kingconfig HAVE_PROC_CPU
129e119bfffSRussell King	bool
130e119bfffSRussell King
131ce816fa8SUwe Kleine-Königconfig NO_IOPORT_MAP
1325ea81769SAl Viro	bool
1335ea81769SAl Viro
1341da177e4SLinus Torvaldsconfig EISA
1351da177e4SLinus Torvalds	bool
1361da177e4SLinus Torvalds	---help---
1371da177e4SLinus Torvalds	  The Extended Industry Standard Architecture (EISA) bus was
1381da177e4SLinus Torvalds	  developed as an open alternative to the IBM MicroChannel bus.
1391da177e4SLinus Torvalds
1401da177e4SLinus Torvalds	  The EISA bus provided some of the features of the IBM MicroChannel
1411da177e4SLinus Torvalds	  bus while maintaining backward compatibility with cards made for
1421da177e4SLinus Torvalds	  the older ISA bus.  The EISA bus saw limited use between 1988 and
1431da177e4SLinus Torvalds	  1995 when it was made obsolete by the PCI bus.
1441da177e4SLinus Torvalds
1451da177e4SLinus Torvalds	  Say Y here if you are building a kernel for an EISA-based machine.
1461da177e4SLinus Torvalds
1471da177e4SLinus Torvalds	  Otherwise, say N.
1481da177e4SLinus Torvalds
1491da177e4SLinus Torvaldsconfig SBUS
1501da177e4SLinus Torvalds	bool
1511da177e4SLinus Torvalds
152f16fb1ecSRussell Kingconfig STACKTRACE_SUPPORT
153f16fb1ecSRussell King	bool
154f16fb1ecSRussell King	default y
155f16fb1ecSRussell King
156f76e9154SNicolas Pitreconfig HAVE_LATENCYTOP_SUPPORT
157f76e9154SNicolas Pitre	bool
158f76e9154SNicolas Pitre	depends on !SMP
159f76e9154SNicolas Pitre	default y
160f76e9154SNicolas Pitre
161f16fb1ecSRussell Kingconfig LOCKDEP_SUPPORT
162f16fb1ecSRussell King	bool
163f16fb1ecSRussell King	default y
164f16fb1ecSRussell King
1657ad1bcb2SRussell Kingconfig TRACE_IRQFLAGS_SUPPORT
1667ad1bcb2SRussell King	bool
1677ad1bcb2SRussell King	default y
1687ad1bcb2SRussell King
1691da177e4SLinus Torvaldsconfig RWSEM_XCHGADD_ALGORITHM
1701da177e4SLinus Torvalds	bool
1718a87411bSWill Deacon	default y
1721da177e4SLinus Torvalds
173f0d1b0b3SDavid Howellsconfig ARCH_HAS_ILOG2_U32
174f0d1b0b3SDavid Howells	bool
175f0d1b0b3SDavid Howells
176f0d1b0b3SDavid Howellsconfig ARCH_HAS_ILOG2_U64
177f0d1b0b3SDavid Howells	bool
178f0d1b0b3SDavid Howells
1794a1b5733SEduardo Valentinconfig ARCH_HAS_BANDGAP
1804a1b5733SEduardo Valentin	bool
1814a1b5733SEduardo Valentin
182b89c3b16SAkinobu Mitaconfig GENERIC_HWEIGHT
183b89c3b16SAkinobu Mita	bool
184b89c3b16SAkinobu Mita	default y
185b89c3b16SAkinobu Mita
1861da177e4SLinus Torvaldsconfig GENERIC_CALIBRATE_DELAY
1871da177e4SLinus Torvalds	bool
1881da177e4SLinus Torvalds	default y
1891da177e4SLinus Torvalds
190a08b6b79Sviro@ZenIV.linux.org.ukconfig ARCH_MAY_HAVE_PC_FDC
191a08b6b79Sviro@ZenIV.linux.org.uk	bool
192a08b6b79Sviro@ZenIV.linux.org.uk
1935ac6da66SChristoph Lameterconfig ZONE_DMA
1945ac6da66SChristoph Lameter	bool
1955ac6da66SChristoph Lameter
196ccd7ab7fSFUJITA Tomonoriconfig NEED_DMA_MAP_STATE
197ccd7ab7fSFUJITA Tomonori       def_bool y
198ccd7ab7fSFUJITA Tomonori
199c7edc9e3SDavid A. Longconfig ARCH_SUPPORTS_UPROBES
200c7edc9e3SDavid A. Long	def_bool y
201c7edc9e3SDavid A. Long
20258af4a24SRob Herringconfig ARCH_HAS_DMA_SET_COHERENT_MASK
20358af4a24SRob Herring	bool
20458af4a24SRob Herring
2051da177e4SLinus Torvaldsconfig GENERIC_ISA_DMA
2061da177e4SLinus Torvalds	bool
2071da177e4SLinus Torvalds
2081da177e4SLinus Torvaldsconfig FIQ
2091da177e4SLinus Torvalds	bool
2101da177e4SLinus Torvalds
21113a5045dSRob Herringconfig NEED_RET_TO_USER
21213a5045dSRob Herring	bool
21313a5045dSRob Herring
214034d2f5aSAl Viroconfig ARCH_MTD_XIP
215034d2f5aSAl Viro	bool
216034d2f5aSAl Viro
217c760fc19SHyok S. Choiconfig VECTORS_BASE
218c760fc19SHyok S. Choi	hex
2196afd6faeSHyok S. Choi	default 0xffff0000 if MMU || CPU_HIGH_VECTOR
220c760fc19SHyok S. Choi	default DRAM_BASE if REMAP_VECTORS_TO_RAM
221c760fc19SHyok S. Choi	default 0x00000000
222c760fc19SHyok S. Choi	help
22319accfd3SRussell King	  The base address of exception vectors.  This must be two pages
22419accfd3SRussell King	  in size.
225c760fc19SHyok S. Choi
226dc21af99SRussell Kingconfig ARM_PATCH_PHYS_VIRT
227c1becedcSRussell King	bool "Patch physical to virtual translations at runtime" if EMBEDDED
228c1becedcSRussell King	default y
229b511d75dSNicolas Pitre	depends on !XIP_KERNEL && MMU
230dc21af99SRussell King	depends on !ARCH_REALVIEW || !SPARSEMEM
231dc21af99SRussell King	help
232111e9a5cSRussell King	  Patch phys-to-virt and virt-to-phys translation functions at
233111e9a5cSRussell King	  boot and module load time according to the position of the
234111e9a5cSRussell King	  kernel in system memory.
235dc21af99SRussell King
236111e9a5cSRussell King	  This can only be used with non-XIP MMU kernels where the base
237daece596SNicolas Pitre	  of physical memory is at a 16MB boundary.
238dc21af99SRussell King
239c1becedcSRussell King	  Only disable this option if you know that you do not require
240c1becedcSRussell King	  this feature (eg, building a kernel for a single machine) and
241c1becedcSRussell King	  you need to shrink the kernel to the minimal size.
242c1becedcSRussell King
243c334bc15SRob Herringconfig NEED_MACH_IO_H
244c334bc15SRob Herring	bool
245c334bc15SRob Herring	help
246c334bc15SRob Herring	  Select this when mach/io.h is required to provide special
247c334bc15SRob Herring	  definitions for this platform.  The need for mach/io.h should
248c334bc15SRob Herring	  be avoided when possible.
249c334bc15SRob Herring
2500cdc8b92SNicolas Pitreconfig NEED_MACH_MEMORY_H
2511b9f95f8SNicolas Pitre	bool
252111e9a5cSRussell King	help
2530cdc8b92SNicolas Pitre	  Select this when mach/memory.h is required to provide special
2540cdc8b92SNicolas Pitre	  definitions for this platform.  The need for mach/memory.h should
2550cdc8b92SNicolas Pitre	  be avoided when possible.
2561b9f95f8SNicolas Pitre
2571b9f95f8SNicolas Pitreconfig PHYS_OFFSET
258974c0724SNicolas Pitre	hex "Physical address of main memory" if MMU
259c6f54a9bSUwe Kleine-König	depends on !ARM_PATCH_PHYS_VIRT
260974c0724SNicolas Pitre	default DRAM_BASE if !MMU
261c6f54a9bSUwe Kleine-König	default 0x00000000 if ARCH_EBSA110 || \
262c6f54a9bSUwe Kleine-König			EP93XX_SDCE3_SYNC_PHYS_OFFSET || \
263c6f54a9bSUwe Kleine-König			ARCH_FOOTBRIDGE || \
264c6f54a9bSUwe Kleine-König			ARCH_INTEGRATOR || \
265c6f54a9bSUwe Kleine-König			ARCH_IOP13XX || \
266c6f54a9bSUwe Kleine-König			ARCH_KS8695 || \
267c6f54a9bSUwe Kleine-König			(ARCH_REALVIEW && !REALVIEW_HIGH_PHYS_OFFSET)
268c6f54a9bSUwe Kleine-König	default 0x10000000 if ARCH_OMAP1 || ARCH_RPC
269c6f54a9bSUwe Kleine-König	default 0x20000000 if ARCH_S5PV210
270c6f54a9bSUwe Kleine-König	default 0x70000000 if REALVIEW_HIGH_PHYS_OFFSET
271c6f54a9bSUwe Kleine-König	default 0xc0000000 if EP93XX_SDCE0_PHYS_OFFSET || ARCH_SA1100
272c6f54a9bSUwe Kleine-König	default 0xd0000000 if EP93XX_SDCE1_PHYS_OFFSET
273c6f54a9bSUwe Kleine-König	default 0xe0000000 if EP93XX_SDCE2_PHYS_OFFSET
274c6f54a9bSUwe Kleine-König	default 0xf0000000 if EP93XX_SDCE3_ASYNC_PHYS_OFFSET
2751b9f95f8SNicolas Pitre	help
2761b9f95f8SNicolas Pitre	  Please provide the physical address corresponding to the
2771b9f95f8SNicolas Pitre	  location of main memory in your system.
278cada3c08SRussell King
27987e040b6SSimon Glassconfig GENERIC_BUG
28087e040b6SSimon Glass	def_bool y
28187e040b6SSimon Glass	depends on BUG
28287e040b6SSimon Glass
2831da177e4SLinus Torvaldssource "init/Kconfig"
2841da177e4SLinus Torvalds
285dc52ddc0SMatt Helsleysource "kernel/Kconfig.freezer"
286dc52ddc0SMatt Helsley
2871da177e4SLinus Torvaldsmenu "System Type"
2881da177e4SLinus Torvalds
2893c427975SHyok S. Choiconfig MMU
2903c427975SHyok S. Choi	bool "MMU-based Paged Memory Management Support"
2913c427975SHyok S. Choi	default y
2923c427975SHyok S. Choi	help
2933c427975SHyok S. Choi	  Select if you want MMU-based virtualised addressing space
2943c427975SHyok S. Choi	  support by paged memory management. If unsure, say 'Y'.
2953c427975SHyok S. Choi
296ccf50e23SRussell King#
297ccf50e23SRussell King# The "ARM system type" choice list is ordered alphabetically by option
298ccf50e23SRussell King# text.  Please add new entries in the option alphabetic order.
299ccf50e23SRussell King#
3001da177e4SLinus Torvaldschoice
3011da177e4SLinus Torvalds	prompt "ARM system type"
3021420b22bSArnd Bergmann	default ARCH_VERSATILE if !MMU
3031420b22bSArnd Bergmann	default ARCH_MULTIPLATFORM if MMU
3041da177e4SLinus Torvalds
305387798b3SRob Herringconfig ARCH_MULTIPLATFORM
306387798b3SRob Herring	bool "Allow multiple platforms to be selected"
307b1b3f49cSRussell King	depends on MMU
308ddb902ccSRob Herring	select ARCH_WANT_OPTIONAL_GPIOLIB
30942dc836dSOlof Johansson	select ARM_HAS_SG_CHAIN
310387798b3SRob Herring	select ARM_PATCH_PHYS_VIRT
311387798b3SRob Herring	select AUTO_ZRELADDR
3126d0add40SRob Herring	select CLKSRC_OF
31366314223SDinh Nguyen	select COMMON_CLK
314ddb902ccSRob Herring	select GENERIC_CLOCKEVENTS
31508d38bebSWill Deacon	select MIGHT_HAVE_PCI
316387798b3SRob Herring	select MULTI_IRQ_HANDLER
31766314223SDinh Nguyen	select SPARSE_IRQ
31866314223SDinh Nguyen	select USE_OF
31966314223SDinh Nguyen
3204af6fee1SDeepak Saxenaconfig ARCH_INTEGRATOR
3214af6fee1SDeepak Saxena	bool "ARM Ltd. Integrator family"
322b1b3f49cSRussell King	select ARM_AMBA
32391942d17SUwe Kleine-König	select ARM_PATCH_PHYS_VIRT if MMU
324fe989145Spanchaxari	select AUTO_ZRELADDR
325a613163dSLinus Walleij	select COMMON_CLK
326f9a6aa43SLinus Walleij	select COMMON_CLK_VERSATILE
327b1b3f49cSRussell King	select GENERIC_CLOCKEVENTS
3289904f793SLinus Walleij	select HAVE_TCM
329c5a0adb5SRussell King	select ICST
330b1b3f49cSRussell King	select MULTI_IRQ_HANDLER
331f4b8b319SRussell King	select PLAT_VERSATILE
332695436e3SLinus Walleij	select SPARSE_IRQ
333d7057e1dSLinus Walleij	select USE_OF
3342389d501SLinus Walleij	select VERSATILE_FPGA_IRQ
3354af6fee1SDeepak Saxena	help
3364af6fee1SDeepak Saxena	  Support for ARM's Integrator platform.
3374af6fee1SDeepak Saxena
3384af6fee1SDeepak Saxenaconfig ARCH_REALVIEW
3394af6fee1SDeepak Saxena	bool "ARM Ltd. RealView family"
340b1b3f49cSRussell King	select ARCH_WANT_OPTIONAL_GPIOLIB
3414af6fee1SDeepak Saxena	select ARM_AMBA
342b1b3f49cSRussell King	select ARM_TIMER_SP804
343f9a6aa43SLinus Walleij	select COMMON_CLK
344f9a6aa43SLinus Walleij	select COMMON_CLK_VERSATILE
345ae30ceacSCatalin Marinas	select GENERIC_CLOCKEVENTS
346b1b3f49cSRussell King	select GPIO_PL061 if GPIOLIB
347b1b3f49cSRussell King	select ICST
348b1b3f49cSRussell King	select NEED_MACH_MEMORY_H
349f4b8b319SRussell King	select PLAT_VERSATILE
3504af6fee1SDeepak Saxena	help
3514af6fee1SDeepak Saxena	  This enables support for ARM Ltd RealView boards.
3524af6fee1SDeepak Saxena
3534af6fee1SDeepak Saxenaconfig ARCH_VERSATILE
3544af6fee1SDeepak Saxena	bool "ARM Ltd. Versatile family"
355b1b3f49cSRussell King	select ARCH_WANT_OPTIONAL_GPIOLIB
3564af6fee1SDeepak Saxena	select ARM_AMBA
357b1b3f49cSRussell King	select ARM_TIMER_SP804
3584af6fee1SDeepak Saxena	select ARM_VIC
3596d803ba7SJean-Christop PLAGNIOL-VILLARD	select CLKDEV_LOOKUP
360b1b3f49cSRussell King	select GENERIC_CLOCKEVENTS
361aa3831cfSKyungmin Park	select HAVE_MACH_CLKDEV
362c5a0adb5SRussell King	select ICST
363f4b8b319SRussell King	select PLAT_VERSATILE
364b1b3f49cSRussell King	select PLAT_VERSATILE_CLOCK
3652389d501SLinus Walleij	select VERSATILE_FPGA_IRQ
3664af6fee1SDeepak Saxena	help
3674af6fee1SDeepak Saxena	  This enables support for ARM Ltd Versatile board.
3684af6fee1SDeepak Saxena
3698fc5ffa0SAndrew Victorconfig ARCH_AT91
3708fc5ffa0SAndrew Victor	bool "Atmel AT91"
371f373e8c0SRyan Mallon	select ARCH_REQUIRE_GPIOLIB
372bd602995SJean-Christophe PLAGNIOL-VILLARD	select CLKDEV_LOOKUP
373e261501dSNicolas Ferre	select IRQ_DOMAIN
3741ac02d79SRob Herring	select NEED_MACH_IO_H if PCCARD
3756732ae5cSJean-Christophe PLAGNIOL-VILLARD	select PINCTRL
3766732ae5cSJean-Christophe PLAGNIOL-VILLARD	select PINCTRL_AT91 if USE_OF
3774af6fee1SDeepak Saxena	help
378929e994fSNicolas Ferre	  This enables support for systems based on Atmel
379929e994fSNicolas Ferre	  AT91RM9200 and AT91SAM9* processors.
3804af6fee1SDeepak Saxena
38193e22567SRussell Kingconfig ARCH_CLPS711X
38293e22567SRussell King	bool "Cirrus Logic CLPS711x/EP721x/EP731x-based"
383a3b8d4a5SAlexander Shiyan	select ARCH_REQUIRE_GPIOLIB
384ea7d1bc9SAlexander Shiyan	select AUTO_ZRELADDR
385c99f72adSAlexander Shiyan	select CLKSRC_MMIO
38693e22567SRussell King	select COMMON_CLK
38793e22567SRussell King	select CPU_ARM720T
3884a8355c4SAlexander Shiyan	select GENERIC_CLOCKEVENTS
3896597619fSAlexander Shiyan	select MFD_SYSCON
390e4e3a37dSAlexander Shiyan	select SOC_BUS
39193e22567SRussell King	help
39293e22567SRussell King	  Support for Cirrus Logic 711x/721x/731x based boards.
39393e22567SRussell King
394788c9700SRussell Kingconfig ARCH_GEMINI
395788c9700SRussell King	bool "Cortina Systems Gemini"
396788c9700SRussell King	select ARCH_REQUIRE_GPIOLIB
397f3372c01SLinus Walleij	select CLKSRC_MMIO
398b1b3f49cSRussell King	select CPU_FA526
399f3372c01SLinus Walleij	select GENERIC_CLOCKEVENTS
400788c9700SRussell King	help
401788c9700SRussell King	  Support for the Cortina Systems Gemini family SoCs
402788c9700SRussell King
4031da177e4SLinus Torvaldsconfig ARCH_EBSA110
4041da177e4SLinus Torvalds	bool "EBSA-110"
405b1b3f49cSRussell King	select ARCH_USES_GETTIMEOFFSET
406c750815eSRussell King	select CPU_SA110
407f7e68bbfSRussell King	select ISA
408c334bc15SRob Herring	select NEED_MACH_IO_H
4090cdc8b92SNicolas Pitre	select NEED_MACH_MEMORY_H
410ce816fa8SUwe Kleine-König	select NO_IOPORT_MAP
4111da177e4SLinus Torvalds	help
4121da177e4SLinus Torvalds	  This is an evaluation board for the StrongARM processor available
413f6c8965aSMartin Michlmayr	  from Digital. It has limited hardware on-board, including an
4141da177e4SLinus Torvalds	  Ethernet interface, two PCMCIA sockets, two serial ports and a
4151da177e4SLinus Torvalds	  parallel port.
4161da177e4SLinus Torvalds
4176d85e2b0SUwe Kleine-Königconfig ARCH_EFM32
4186d85e2b0SUwe Kleine-König	bool "Energy Micro efm32"
4196d85e2b0SUwe Kleine-König	depends on !MMU
4206d85e2b0SUwe Kleine-König	select ARCH_REQUIRE_GPIOLIB
4216d85e2b0SUwe Kleine-König	select ARM_NVIC
42251aaf81fSRussell King	select AUTO_ZRELADDR
4236d85e2b0SUwe Kleine-König	select CLKSRC_OF
4246d85e2b0SUwe Kleine-König	select COMMON_CLK
4256d85e2b0SUwe Kleine-König	select CPU_V7M
4266d85e2b0SUwe Kleine-König	select GENERIC_CLOCKEVENTS
4276d85e2b0SUwe Kleine-König	select NO_DMA
428ce816fa8SUwe Kleine-König	select NO_IOPORT_MAP
4296d85e2b0SUwe Kleine-König	select SPARSE_IRQ
4306d85e2b0SUwe Kleine-König	select USE_OF
4316d85e2b0SUwe Kleine-König	help
4326d85e2b0SUwe Kleine-König	  Support for Energy Micro's (now Silicon Labs) efm32 Giant Gecko
4336d85e2b0SUwe Kleine-König	  processors.
4346d85e2b0SUwe Kleine-König
435e7736d47SLennert Buytenhekconfig ARCH_EP93XX
436e7736d47SLennert Buytenhek	bool "EP93xx-based"
437b1b3f49cSRussell King	select ARCH_HAS_HOLES_MEMORYMODEL
438b1b3f49cSRussell King	select ARCH_REQUIRE_GPIOLIB
439b1b3f49cSRussell King	select ARCH_USES_GETTIMEOFFSET
440e7736d47SLennert Buytenhek	select ARM_AMBA
441e7736d47SLennert Buytenhek	select ARM_VIC
4426d803ba7SJean-Christop PLAGNIOL-VILLARD	select CLKDEV_LOOKUP
443b1b3f49cSRussell King	select CPU_ARM920T
444e7736d47SLennert Buytenhek	help
445e7736d47SLennert Buytenhek	  This enables support for the Cirrus EP93xx series of CPUs.
446e7736d47SLennert Buytenhek
4471da177e4SLinus Torvaldsconfig ARCH_FOOTBRIDGE
4481da177e4SLinus Torvalds	bool "FootBridge"
449c750815eSRussell King	select CPU_SA110
4501da177e4SLinus Torvalds	select FOOTBRIDGE
4514e8d7637SRussell King	select GENERIC_CLOCKEVENTS
452d0ee9f40SArnd Bergmann	select HAVE_IDE
4538ef6e620SRob Herring	select NEED_MACH_IO_H if !MMU
4540cdc8b92SNicolas Pitre	select NEED_MACH_MEMORY_H
455f999b8bdSMartin Michlmayr	help
456f999b8bdSMartin Michlmayr	  Support for systems based on the DC21285 companion chip
457f999b8bdSMartin Michlmayr	  ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
4581da177e4SLinus Torvalds
4594af6fee1SDeepak Saxenaconfig ARCH_NETX
4604af6fee1SDeepak Saxena	bool "Hilscher NetX based"
461b1b3f49cSRussell King	select ARM_VIC
462234b6cedSRussell King	select CLKSRC_MMIO
463c750815eSRussell King	select CPU_ARM926T
4642fcfe6b8SUwe Kleine-König	select GENERIC_CLOCKEVENTS
465f999b8bdSMartin Michlmayr	help
4664af6fee1SDeepak Saxena	  This enables support for systems based on the Hilscher NetX Soc
4674af6fee1SDeepak Saxena
4683b938be6SRussell Kingconfig ARCH_IOP13XX
4693b938be6SRussell King	bool "IOP13xx-based"
4703b938be6SRussell King	depends on MMU
471b1b3f49cSRussell King	select CPU_XSC3
4720cdc8b92SNicolas Pitre	select NEED_MACH_MEMORY_H
47313a5045dSRob Herring	select NEED_RET_TO_USER
474b1b3f49cSRussell King	select PCI
475b1b3f49cSRussell King	select PLAT_IOP
476b1b3f49cSRussell King	select VMSPLIT_1G
47737ebbcffSThomas Gleixner	select SPARSE_IRQ
4783b938be6SRussell King	help
4793b938be6SRussell King	  Support for Intel's IOP13XX (XScale) family of processors.
4803b938be6SRussell King
4813f7e5815SLennert Buytenhekconfig ARCH_IOP32X
4823f7e5815SLennert Buytenhek	bool "IOP32x-based"
483a4f7e763SRussell King	depends on MMU
484b1b3f49cSRussell King	select ARCH_REQUIRE_GPIOLIB
485c750815eSRussell King	select CPU_XSCALE
486e9004f50SLinus Walleij	select GPIO_IOP
48713a5045dSRob Herring	select NEED_RET_TO_USER
488f7e68bbfSRussell King	select PCI
489b1b3f49cSRussell King	select PLAT_IOP
490f999b8bdSMartin Michlmayr	help
4913f7e5815SLennert Buytenhek	  Support for Intel's 80219 and IOP32X (XScale) family of
4923f7e5815SLennert Buytenhek	  processors.
4933f7e5815SLennert Buytenhek
4943f7e5815SLennert Buytenhekconfig ARCH_IOP33X
4953f7e5815SLennert Buytenhek	bool "IOP33x-based"
4963f7e5815SLennert Buytenhek	depends on MMU
497b1b3f49cSRussell King	select ARCH_REQUIRE_GPIOLIB
498c750815eSRussell King	select CPU_XSCALE
499e9004f50SLinus Walleij	select GPIO_IOP
50013a5045dSRob Herring	select NEED_RET_TO_USER
5013f7e5815SLennert Buytenhek	select PCI
502b1b3f49cSRussell King	select PLAT_IOP
5033f7e5815SLennert Buytenhek	help
5043f7e5815SLennert Buytenhek	  Support for Intel's IOP33X (XScale) family of processors.
5051da177e4SLinus Torvalds
5063b938be6SRussell Kingconfig ARCH_IXP4XX
5073b938be6SRussell King	bool "IXP4xx-based"
508a4f7e763SRussell King	depends on MMU
50958af4a24SRob Herring	select ARCH_HAS_DMA_SET_COHERENT_MASK
510b1b3f49cSRussell King	select ARCH_REQUIRE_GPIOLIB
51151aaf81fSRussell King	select ARCH_SUPPORTS_BIG_ENDIAN
512234b6cedSRussell King	select CLKSRC_MMIO
513c750815eSRussell King	select CPU_XSCALE
514b1b3f49cSRussell King	select DMABOUNCE if PCI
5153b938be6SRussell King	select GENERIC_CLOCKEVENTS
5160b05da72SHans Ulli Kroll	select MIGHT_HAVE_PCI
517c334bc15SRob Herring	select NEED_MACH_IO_H
5189296d94dSFlorian Fainelli	select USB_EHCI_BIG_ENDIAN_DESC
519171b3f0dSRussell King	select USB_EHCI_BIG_ENDIAN_MMIO
520c4713074SLennert Buytenhek	help
5213b938be6SRussell King	  Support for Intel's IXP4XX (XScale) family of processors.
522c4713074SLennert Buytenhek
523edabd38eSSaeed Bisharaconfig ARCH_DOVE
524edabd38eSSaeed Bishara	bool "Marvell Dove"
525edabd38eSSaeed Bishara	select ARCH_REQUIRE_GPIOLIB
526756b2531SSebastian Hesselbarth	select CPU_PJ4
527edabd38eSSaeed Bishara	select GENERIC_CLOCKEVENTS
5280f81bd43SRussell King	select MIGHT_HAVE_PCI
529171b3f0dSRussell King	select MVEBU_MBUS
5309139acd1SSebastian Hesselbarth	select PINCTRL
5319139acd1SSebastian Hesselbarth	select PINCTRL_DOVE
532abcda1dcSThomas Petazzoni	select PLAT_ORION_LEGACY
533edabd38eSSaeed Bishara	help
534edabd38eSSaeed Bishara	  Support for the Marvell Dove SoC 88AP510
535edabd38eSSaeed Bishara
536788c9700SRussell Kingconfig ARCH_MV78XX0
537788c9700SRussell King	bool "Marvell MV78xx0"
538a8865655SErik Benada	select ARCH_REQUIRE_GPIOLIB
539b1b3f49cSRussell King	select CPU_FEROCEON
540788c9700SRussell King	select GENERIC_CLOCKEVENTS
541171b3f0dSRussell King	select MVEBU_MBUS
542b1b3f49cSRussell King	select PCI
543abcda1dcSThomas Petazzoni	select PLAT_ORION_LEGACY
544788c9700SRussell King	help
545788c9700SRussell King	  Support for the following Marvell MV78xx0 series SoCs:
546788c9700SRussell King	  MV781x0, MV782x0.
547788c9700SRussell King
548788c9700SRussell Kingconfig ARCH_ORION5X
549788c9700SRussell King	bool "Marvell Orion"
550788c9700SRussell King	depends on MMU
551a8865655SErik Benada	select ARCH_REQUIRE_GPIOLIB
552b1b3f49cSRussell King	select CPU_FEROCEON
553788c9700SRussell King	select GENERIC_CLOCKEVENTS
554171b3f0dSRussell King	select MVEBU_MBUS
555b1b3f49cSRussell King	select PCI
556abcda1dcSThomas Petazzoni	select PLAT_ORION_LEGACY
557788c9700SRussell King	help
558788c9700SRussell King	  Support for the following Marvell Orion 5x series SoCs:
559788c9700SRussell King	  Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
560788c9700SRussell King	  Orion-2 (5281), Orion-1-90 (6183).
561788c9700SRussell King
562788c9700SRussell Kingconfig ARCH_MMP
5632f7e8faeSHaojian Zhuang	bool "Marvell PXA168/910/MMP2"
564788c9700SRussell King	depends on MMU
565788c9700SRussell King	select ARCH_REQUIRE_GPIOLIB
5666d803ba7SJean-Christop PLAGNIOL-VILLARD	select CLKDEV_LOOKUP
567b1b3f49cSRussell King	select GENERIC_ALLOCATOR
568788c9700SRussell King	select GENERIC_CLOCKEVENTS
569157d2644SHaojian Zhuang	select GPIO_PXA
570c24b3114SHaojian Zhuang	select IRQ_DOMAIN
5710f374561SHaojian Zhuang	select MULTI_IRQ_HANDLER
5727c8f86a4SAxel Lin	select PINCTRL
573788c9700SRussell King	select PLAT_PXA
5740bd86961SHaojian Zhuang	select SPARSE_IRQ
575788c9700SRussell King	help
5762f7e8faeSHaojian Zhuang	  Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
577788c9700SRussell King
578c53c9cf6SAndrew Victorconfig ARCH_KS8695
579c53c9cf6SAndrew Victor	bool "Micrel/Kendin KS8695"
58072880ad8SDaniel Silverstone	select ARCH_REQUIRE_GPIOLIB
581c7e783d6SLinus Walleij	select CLKSRC_MMIO
582b1b3f49cSRussell King	select CPU_ARM922T
583c7e783d6SLinus Walleij	select GENERIC_CLOCKEVENTS
584b1b3f49cSRussell King	select NEED_MACH_MEMORY_H
585c53c9cf6SAndrew Victor	help
586c53c9cf6SAndrew Victor	  Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
587c53c9cf6SAndrew Victor	  System-on-Chip devices.
588c53c9cf6SAndrew Victor
589788c9700SRussell Kingconfig ARCH_W90X900
590788c9700SRussell King	bool "Nuvoton W90X900 CPU"
591c52d3d68Swanzongshun	select ARCH_REQUIRE_GPIOLIB
5926d803ba7SJean-Christop PLAGNIOL-VILLARD	select CLKDEV_LOOKUP
5936fa5d5f7SRussell King	select CLKSRC_MMIO
594b1b3f49cSRussell King	select CPU_ARM926T
59558b5369eSwanzongshun	select GENERIC_CLOCKEVENTS
596777f9bebSLennert Buytenhek	help
597a8bc4eadSwanzongshun	  Support for Nuvoton (Winbond logic dept.) ARM9 processor,
598a8bc4eadSwanzongshun	  At present, the w90x900 has been renamed nuc900, regarding
599a8bc4eadSwanzongshun	  the ARM series product line, you can login the following
600a8bc4eadSwanzongshun	  link address to know more.
601a8bc4eadSwanzongshun
602a8bc4eadSwanzongshun	  <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
603a8bc4eadSwanzongshun		ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
604585cf175STzachi Perelstein
60593e22567SRussell Kingconfig ARCH_LPC32XX
60693e22567SRussell King	bool "NXP LPC32XX"
60793e22567SRussell King	select ARCH_REQUIRE_GPIOLIB
60893e22567SRussell King	select ARM_AMBA
6094073723aSRussell King	select CLKDEV_LOOKUP
610234b6cedSRussell King	select CLKSRC_MMIO
61193e22567SRussell King	select CPU_ARM926T
61293e22567SRussell King	select GENERIC_CLOCKEVENTS
61393e22567SRussell King	select HAVE_IDE
61493e22567SRussell King	select USE_OF
61593e22567SRussell King	help
61693e22567SRussell King	  Support for the NXP LPC32XX family of processors
61793e22567SRussell King
6181da177e4SLinus Torvaldsconfig ARCH_PXA
6192c8086a5Seric miao	bool "PXA2xx/PXA3xx-based"
620a4f7e763SRussell King	depends on MMU
621b1b3f49cSRussell King	select ARCH_MTD_XIP
622b1b3f49cSRussell King	select ARCH_REQUIRE_GPIOLIB
623b1b3f49cSRussell King	select ARM_CPU_SUSPEND if PM
624b1b3f49cSRussell King	select AUTO_ZRELADDR
6256d803ba7SJean-Christop PLAGNIOL-VILLARD	select CLKDEV_LOOKUP
626234b6cedSRussell King	select CLKSRC_MMIO
6276f6caeaaSRobert Jarzmik	select CLKSRC_OF
628981d0f39SEric Miao	select GENERIC_CLOCKEVENTS
629157d2644SHaojian Zhuang	select GPIO_PXA
630b1b3f49cSRussell King	select HAVE_IDE
631b1b3f49cSRussell King	select MULTI_IRQ_HANDLER
632bd5ce433SEric Miao	select PLAT_PXA
6336ac6b817SHaojian Zhuang	select SPARSE_IRQ
634f999b8bdSMartin Michlmayr	help
6352c8086a5Seric miao	  Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
6361da177e4SLinus Torvalds
6378fc1b0f8SKumar Galaconfig ARCH_MSM
6388fc1b0f8SKumar Gala	bool "Qualcomm MSM (non-multiplatform)"
639923a081cSPavel Machek	select ARCH_REQUIRE_GPIOLIB
6408cc7f533SStephen Boyd	select COMMON_CLK
641b1b3f49cSRussell King	select GENERIC_CLOCKEVENTS
64249cbe786SEric Miao	help
6434b53eb4fSDaniel Walker	  Support for Qualcomm MSM/QSD based systems.  This runs on the
6444b53eb4fSDaniel Walker	  apps processor of the MSM/QSD and depends on a shared memory
6454b53eb4fSDaniel Walker	  interface to the modem processor which runs the baseband
6464b53eb4fSDaniel Walker	  stack and controls some vital subsystems
6474b53eb4fSDaniel Walker	  (clock and power control, etc).
64849cbe786SEric Miao
649bf98c1eaSLaurent Pinchartconfig ARCH_SHMOBILE_LEGACY
6500d9fd616SLaurent Pinchart	bool "Renesas ARM SoCs (non-multiplatform)"
651bf98c1eaSLaurent Pinchart	select ARCH_SHMOBILE
65291942d17SUwe Kleine-König	select ARM_PATCH_PHYS_VIRT if MMU
6535e93c6b4SPaul Mundt	select CLKDEV_LOOKUP
654b1b3f49cSRussell King	select GENERIC_CLOCKEVENTS
6554c3ffffdSStephen Boyd	select HAVE_ARM_SCU if SMP
656a894fcc2SStephen Boyd	select HAVE_ARM_TWD if SMP
657aa3831cfSKyungmin Park	select HAVE_MACH_CLKDEV
6583b55658aSDave Martin	select HAVE_SMP
659ce5ea9f3SDave Martin	select MIGHT_HAVE_CACHE_L2X0
66060f1435cSMagnus Damm	select MULTI_IRQ_HANDLER
661ce816fa8SUwe Kleine-König	select NO_IOPORT_MAP
6622cd3c927SLaurent Pinchart	select PINCTRL
663b1b3f49cSRussell King	select PM_GENERIC_DOMAINS if PM
664b1b3f49cSRussell King	select SPARSE_IRQ
665c793c1b0SMagnus Damm	help
6660d9fd616SLaurent Pinchart	  Support for Renesas ARM SoC platforms using a non-multiplatform
6670d9fd616SLaurent Pinchart	  kernel. This includes the SH-Mobile, R-Mobile, EMMA-Mobile, R-Car
6680d9fd616SLaurent Pinchart	  and RZ families.
669c793c1b0SMagnus Damm
6701da177e4SLinus Torvaldsconfig ARCH_RPC
6711da177e4SLinus Torvalds	bool "RiscPC"
6721da177e4SLinus Torvalds	select ARCH_ACORN
673a08b6b79Sviro@ZenIV.linux.org.uk	select ARCH_MAY_HAVE_PC_FDC
67407f841b7SRussell King	select ARCH_SPARSEMEM_ENABLE
6755cfc8ee0SJohn Stultz	select ARCH_USES_GETTIMEOFFSET
676fa04e209SArnd Bergmann	select CPU_SA110
677b1b3f49cSRussell King	select FIQ
678d0ee9f40SArnd Bergmann	select HAVE_IDE
679b1b3f49cSRussell King	select HAVE_PATA_PLATFORM
680b1b3f49cSRussell King	select ISA_DMA_API
681c334bc15SRob Herring	select NEED_MACH_IO_H
6820cdc8b92SNicolas Pitre	select NEED_MACH_MEMORY_H
683ce816fa8SUwe Kleine-König	select NO_IOPORT_MAP
684b4811bacSArnd Bergmann	select VIRT_TO_BUS
6851da177e4SLinus Torvalds	help
6861da177e4SLinus Torvalds	  On the Acorn Risc-PC, Linux can support the internal IDE disk and
6871da177e4SLinus Torvalds	  CD-ROM interface, serial and parallel port, and the floppy drive.
6881da177e4SLinus Torvalds
6891da177e4SLinus Torvaldsconfig ARCH_SA1100
6901da177e4SLinus Torvalds	bool "SA1100-based"
691b1b3f49cSRussell King	select ARCH_MTD_XIP
6927444a72eSMichael Buesch	select ARCH_REQUIRE_GPIOLIB
693b1b3f49cSRussell King	select ARCH_SPARSEMEM_ENABLE
694b1b3f49cSRussell King	select CLKDEV_LOOKUP
695b1b3f49cSRussell King	select CLKSRC_MMIO
696b1b3f49cSRussell King	select CPU_FREQ
697b1b3f49cSRussell King	select CPU_SA1100
698b1b3f49cSRussell King	select GENERIC_CLOCKEVENTS
699d0ee9f40SArnd Bergmann	select HAVE_IDE
700b1b3f49cSRussell King	select ISA
7010cdc8b92SNicolas Pitre	select NEED_MACH_MEMORY_H
702375dec92SRussell King	select SPARSE_IRQ
703f999b8bdSMartin Michlmayr	help
704f999b8bdSMartin Michlmayr	  Support for StrongARM 11x0 based boards.
7051da177e4SLinus Torvalds
706b130d5c2SKukjin Kimconfig ARCH_S3C24XX
707b130d5c2SKukjin Kim	bool "Samsung S3C24XX SoCs"
70853650430SKukjin Kim	select ARCH_REQUIRE_GPIOLIB
709335cce74SArnd Bergmann	select ATAGS
710b1b3f49cSRussell King	select CLKDEV_LOOKUP
7114280506aSTomasz Figa	select CLKSRC_SAMSUNG_PWM
7127f78b6ebSRomain Naour	select GENERIC_CLOCKEVENTS
713880cf071STomasz Figa	select GPIO_SAMSUNG
71420676c15SKukjin Kim	select HAVE_S3C2410_I2C if I2C
715b130d5c2SKukjin Kim	select HAVE_S3C2410_WATCHDOG if WATCHDOG
716b1b3f49cSRussell King	select HAVE_S3C_RTC if RTC_CLASS
71717453dd2SHeiko Stuebner	select MULTI_IRQ_HANDLER
718c334bc15SRob Herring	select NEED_MACH_IO_H
719cd8dc7aeSTomasz Figa	select SAMSUNG_ATAGS
7201da177e4SLinus Torvalds	help
721b130d5c2SKukjin Kim	  Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443
722b130d5c2SKukjin Kim	  and S3C2450 SoCs based systems, such as the Simtec Electronics BAST
723b130d5c2SKukjin Kim	  (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or the
724b130d5c2SKukjin Kim	  Samsung SMDK2410 development board (and derivatives).
72563b1f51bSBen Dooks
726a08ab637SBen Dooksconfig ARCH_S3C64XX
727a08ab637SBen Dooks	bool "Samsung S3C64XX"
72889f0ce72SBen Dooks	select ARCH_REQUIRE_GPIOLIB
7291db0287aSTomasz Figa	select ARM_AMBA
730b1b3f49cSRussell King	select ARM_VIC
731335cce74SArnd Bergmann	select ATAGS
732b1b3f49cSRussell King	select CLKDEV_LOOKUP
7334280506aSTomasz Figa	select CLKSRC_SAMSUNG_PWM
734ccecba3cSPankaj Dubey	select COMMON_CLK_SAMSUNG
73570bacadbSTomasz Figa	select CPU_V6K
73604a49b71SRomain Naour	select GENERIC_CLOCKEVENTS
737880cf071STomasz Figa	select GPIO_SAMSUNG
73820676c15SKukjin Kim	select HAVE_S3C2410_I2C if I2C
739c39d8d55SKyungmin Park	select HAVE_S3C2410_WATCHDOG if WATCHDOG
740b1b3f49cSRussell King	select HAVE_TCM
741ce816fa8SUwe Kleine-König	select NO_IOPORT_MAP
742b1b3f49cSRussell King	select PLAT_SAMSUNG
7434ab75a3fSArnd Bergmann	select PM_GENERIC_DOMAINS if PM
744b1b3f49cSRussell King	select S3C_DEV_NAND
745b1b3f49cSRussell King	select S3C_GPIO_TRACK
746cd8dc7aeSTomasz Figa	select SAMSUNG_ATAGS
7476e2d9e93STomasz Figa	select SAMSUNG_WAKEMASK
74888f59738STomasz Figa	select SAMSUNG_WDT_RESET
749a08ab637SBen Dooks	help
750a08ab637SBen Dooks	  Samsung S3C64XX series based systems
751a08ab637SBen Dooks
7527c6337e2SKevin Hilmanconfig ARCH_DAVINCI
7537c6337e2SKevin Hilman	bool "TI DaVinci"
754b1b3f49cSRussell King	select ARCH_HAS_HOLES_MEMORYMODEL
755dce1115bSDavid Brownell	select ARCH_REQUIRE_GPIOLIB
7566d803ba7SJean-Christop PLAGNIOL-VILLARD	select CLKDEV_LOOKUP
75720e9969bSDavid Brownell	select GENERIC_ALLOCATOR
758b1b3f49cSRussell King	select GENERIC_CLOCKEVENTS
759dc7ad3b3SRussell King	select GENERIC_IRQ_CHIP
760b1b3f49cSRussell King	select HAVE_IDE
7613ad7a42dSMatt Porter	select TI_PRIV_EDMA
762689e331fSSekhar Nori	select USE_OF
763b1b3f49cSRussell King	select ZONE_DMA
7647c6337e2SKevin Hilman	help
7657c6337e2SKevin Hilman	  Support for TI's DaVinci platform.
7667c6337e2SKevin Hilman
767a0694861STony Lindgrenconfig ARCH_OMAP1
768a0694861STony Lindgren	bool "TI OMAP1"
76900a36698SArnd Bergmann	depends on MMU
770b1b3f49cSRussell King	select ARCH_HAS_HOLES_MEMORYMODEL
771a0694861STony Lindgren	select ARCH_OMAP
77221f47fbcSAlexey Charkov	select ARCH_REQUIRE_GPIOLIB
773e9a91de7STony Prisk	select CLKDEV_LOOKUP
774cee37e50Sviresh kumar	select CLKSRC_MMIO
775b1b3f49cSRussell King	select GENERIC_CLOCKEVENTS
776a0694861STony Lindgren	select GENERIC_IRQ_CHIP
777a0694861STony Lindgren	select HAVE_IDE
778a0694861STony Lindgren	select IRQ_DOMAIN
779a0694861STony Lindgren	select NEED_MACH_IO_H if PCCARD
780a0694861STony Lindgren	select NEED_MACH_MEMORY_H
78121f47fbcSAlexey Charkov	help
782a0694861STony Lindgren	  Support for older TI OMAP1 (omap7xx, omap15xx or omap16xx)
78302c981c0SBinghua Duan
7841da177e4SLinus Torvaldsendchoice
7851da177e4SLinus Torvalds
786387798b3SRob Herringmenu "Multiple platform selection"
787387798b3SRob Herring	depends on ARCH_MULTIPLATFORM
788387798b3SRob Herring
789387798b3SRob Herringcomment "CPU Core family selection"
790387798b3SRob Herring
791f8afae40SArnd Bergmannconfig ARCH_MULTI_V4
792f8afae40SArnd Bergmann	bool "ARMv4 based platforms (FA526)"
793f8afae40SArnd Bergmann	depends on !ARCH_MULTI_V6_V7
794f8afae40SArnd Bergmann	select ARCH_MULTI_V4_V5
795f8afae40SArnd Bergmann	select CPU_FA526
796f8afae40SArnd Bergmann
797387798b3SRob Herringconfig ARCH_MULTI_V4T
798387798b3SRob Herring	bool "ARMv4T based platforms (ARM720T, ARM920T, ...)"
799387798b3SRob Herring	depends on !ARCH_MULTI_V6_V7
800b1b3f49cSRussell King	select ARCH_MULTI_V4_V5
80124e860fbSArnd Bergmann	select CPU_ARM920T if !(CPU_ARM7TDMI || CPU_ARM720T || \
80224e860fbSArnd Bergmann		CPU_ARM740T || CPU_ARM9TDMI || CPU_ARM922T || \
80324e860fbSArnd Bergmann		CPU_ARM925T || CPU_ARM940T)
804387798b3SRob Herring
805387798b3SRob Herringconfig ARCH_MULTI_V5
806387798b3SRob Herring	bool "ARMv5 based platforms (ARM926T, XSCALE, PJ1, ...)"
807387798b3SRob Herring	depends on !ARCH_MULTI_V6_V7
808b1b3f49cSRussell King	select ARCH_MULTI_V4_V5
80912567bbdSAndrew Lunn	select CPU_ARM926T if !(CPU_ARM946E || CPU_ARM1020 || \
81024e860fbSArnd Bergmann		CPU_ARM1020E || CPU_ARM1022 || CPU_ARM1026 || \
81124e860fbSArnd Bergmann		CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_FEROCEON)
812387798b3SRob Herring
813387798b3SRob Herringconfig ARCH_MULTI_V4_V5
814387798b3SRob Herring	bool
815387798b3SRob Herring
816387798b3SRob Herringconfig ARCH_MULTI_V6
8178dda05ccSStephen Boyd	bool "ARMv6 based platforms (ARM11)"
818387798b3SRob Herring	select ARCH_MULTI_V6_V7
81942f4754aSRob Herring	select CPU_V6K
820387798b3SRob Herring
821387798b3SRob Herringconfig ARCH_MULTI_V7
8228dda05ccSStephen Boyd	bool "ARMv7 based platforms (Cortex-A, PJ4, Scorpion, Krait)"
823387798b3SRob Herring	default y
824387798b3SRob Herring	select ARCH_MULTI_V6_V7
825b1b3f49cSRussell King	select CPU_V7
82690bc8ac7SRob Herring	select HAVE_SMP
827387798b3SRob Herring
828387798b3SRob Herringconfig ARCH_MULTI_V6_V7
829387798b3SRob Herring	bool
8309352b05bSRob Herring	select MIGHT_HAVE_CACHE_L2X0
831387798b3SRob Herring
832387798b3SRob Herringconfig ARCH_MULTI_CPU_AUTO
833387798b3SRob Herring	def_bool !(ARCH_MULTI_V4 || ARCH_MULTI_V4T || ARCH_MULTI_V6_V7)
834387798b3SRob Herring	select ARCH_MULTI_V5
835387798b3SRob Herring
836387798b3SRob Herringendmenu
837387798b3SRob Herring
83805e2a3deSRob Herringconfig ARCH_VIRT
83905e2a3deSRob Herring	bool "Dummy Virtual Machine" if ARCH_MULTI_V7
8404b8b5f25SRob Herring	select ARM_AMBA
84105e2a3deSRob Herring	select ARM_GIC
84205e2a3deSRob Herring	select ARM_PSCI
8434b8b5f25SRob Herring	select HAVE_ARM_ARCH_TIMER
84405e2a3deSRob Herring
845ccf50e23SRussell King#
846ccf50e23SRussell King# This is sorted alphabetically by mach-* pathname.  However, plat-*
847ccf50e23SRussell King# Kconfigs may be included either alphabetically (according to the
848ccf50e23SRussell King# plat- suffix) or along side the corresponding mach-* source.
849ccf50e23SRussell King#
8503e93a22bSGregory CLEMENTsource "arch/arm/mach-mvebu/Kconfig"
8513e93a22bSGregory CLEMENT
85295b8f20fSRussell Kingsource "arch/arm/mach-at91/Kconfig"
85395b8f20fSRussell King
8541d22924eSAnders Bergsource "arch/arm/mach-axxia/Kconfig"
8551d22924eSAnders Berg
8568ac49e04SChristian Daudtsource "arch/arm/mach-bcm/Kconfig"
8578ac49e04SChristian Daudt
8581c37fa10SSebastian Hesselbarthsource "arch/arm/mach-berlin/Kconfig"
8591c37fa10SSebastian Hesselbarth
8601da177e4SLinus Torvaldssource "arch/arm/mach-clps711x/Kconfig"
8611da177e4SLinus Torvalds
862d94f944eSAnton Vorontsovsource "arch/arm/mach-cns3xxx/Kconfig"
863d94f944eSAnton Vorontsov
86495b8f20fSRussell Kingsource "arch/arm/mach-davinci/Kconfig"
86595b8f20fSRussell King
86695b8f20fSRussell Kingsource "arch/arm/mach-dove/Kconfig"
86795b8f20fSRussell King
868e7736d47SLennert Buytenheksource "arch/arm/mach-ep93xx/Kconfig"
869e7736d47SLennert Buytenhek
8701da177e4SLinus Torvaldssource "arch/arm/mach-footbridge/Kconfig"
8711da177e4SLinus Torvalds
87259d3a193SPaulius Zaleckassource "arch/arm/mach-gemini/Kconfig"
87359d3a193SPaulius Zaleckas
874387798b3SRob Herringsource "arch/arm/mach-highbank/Kconfig"
875387798b3SRob Herring
876389ee0c2SHaojian Zhuangsource "arch/arm/mach-hisi/Kconfig"
877389ee0c2SHaojian Zhuang
8781da177e4SLinus Torvaldssource "arch/arm/mach-integrator/Kconfig"
8791da177e4SLinus Torvalds
8803f7e5815SLennert Buytenheksource "arch/arm/mach-iop32x/Kconfig"
8813f7e5815SLennert Buytenhek
8823f7e5815SLennert Buytenheksource "arch/arm/mach-iop33x/Kconfig"
8831da177e4SLinus Torvalds
884285f5fa7SDan Williamssource "arch/arm/mach-iop13xx/Kconfig"
885285f5fa7SDan Williams
8861da177e4SLinus Torvaldssource "arch/arm/mach-ixp4xx/Kconfig"
8871da177e4SLinus Torvalds
888828989adSSantosh Shilimkarsource "arch/arm/mach-keystone/Kconfig"
889828989adSSantosh Shilimkar
89095b8f20fSRussell Kingsource "arch/arm/mach-ks8695/Kconfig"
89195b8f20fSRussell King
892*3b8f5030SCarlo Caionesource "arch/arm/mach-meson/Kconfig"
893*3b8f5030SCarlo Caione
89495b8f20fSRussell Kingsource "arch/arm/mach-msm/Kconfig"
89595b8f20fSRussell King
89617723fd3SJonas Jensensource "arch/arm/mach-moxart/Kconfig"
89717723fd3SJonas Jensen
898794d15b2SStanislav Samsonovsource "arch/arm/mach-mv78xx0/Kconfig"
899794d15b2SStanislav Samsonov
9003995eb82SShawn Guosource "arch/arm/mach-imx/Kconfig"
9011da177e4SLinus Torvalds
902f682a218SMatthias Bruggersource "arch/arm/mach-mediatek/Kconfig"
903f682a218SMatthias Brugger
9041d3f33d5SShawn Guosource "arch/arm/mach-mxs/Kconfig"
9051d3f33d5SShawn Guo
90695b8f20fSRussell Kingsource "arch/arm/mach-netx/Kconfig"
90749cbe786SEric Miao
90895b8f20fSRussell Kingsource "arch/arm/mach-nomadik/Kconfig"
90995b8f20fSRussell King
9109851ca57SDaniel Tangsource "arch/arm/mach-nspire/Kconfig"
9119851ca57SDaniel Tang
912d48af15eSTony Lindgrensource "arch/arm/plat-omap/Kconfig"
913d48af15eSTony Lindgren
914d48af15eSTony Lindgrensource "arch/arm/mach-omap1/Kconfig"
9151da177e4SLinus Torvalds
9161dbae815STony Lindgrensource "arch/arm/mach-omap2/Kconfig"
9171dbae815STony Lindgren
9189dd0b194SLennert Buytenheksource "arch/arm/mach-orion5x/Kconfig"
919585cf175STzachi Perelstein
920387798b3SRob Herringsource "arch/arm/mach-picoxcell/Kconfig"
921387798b3SRob Herring
92295b8f20fSRussell Kingsource "arch/arm/mach-pxa/Kconfig"
92395b8f20fSRussell Kingsource "arch/arm/plat-pxa/Kconfig"
9241da177e4SLinus Torvalds
92595b8f20fSRussell Kingsource "arch/arm/mach-mmp/Kconfig"
92695b8f20fSRussell King
9278fc1b0f8SKumar Galasource "arch/arm/mach-qcom/Kconfig"
9288fc1b0f8SKumar Gala
92995b8f20fSRussell Kingsource "arch/arm/mach-realview/Kconfig"
93095b8f20fSRussell King
931d63dc051SHeiko Stuebnersource "arch/arm/mach-rockchip/Kconfig"
932d63dc051SHeiko Stuebner
93395b8f20fSRussell Kingsource "arch/arm/mach-sa1100/Kconfig"
934edabd38eSSaeed Bishara
935387798b3SRob Herringsource "arch/arm/mach-socfpga/Kconfig"
936387798b3SRob Herring
937a7ed099fSArnd Bergmannsource "arch/arm/mach-spear/Kconfig"
938a21765a7SBen Dooks
93965ebcc11SSrinivas Kandagatlasource "arch/arm/mach-sti/Kconfig"
94065ebcc11SSrinivas Kandagatla
94185fd6d63SKukjin Kimsource "arch/arm/mach-s3c24xx/Kconfig"
9421da177e4SLinus Torvalds
943431107eaSBen Dookssource "arch/arm/mach-s3c64xx/Kconfig"
944a08ab637SBen Dooks
945170f4e42SKukjin Kimsource "arch/arm/mach-s5pv210/Kconfig"
946170f4e42SKukjin Kim
94783014579SKukjin Kimsource "arch/arm/mach-exynos/Kconfig"
948e509b289SRob Herringsource "arch/arm/plat-samsung/Kconfig"
949cc0e72b8SChanghwan Youn
950882d01f9SRussell Kingsource "arch/arm/mach-shmobile/Kconfig"
9511da177e4SLinus Torvalds
9523b52634fSMaxime Ripardsource "arch/arm/mach-sunxi/Kconfig"
9533b52634fSMaxime Ripard
954156a0997SBarry Songsource "arch/arm/mach-prima2/Kconfig"
955156a0997SBarry Song
956c5f80065SErik Gillingsource "arch/arm/mach-tegra/Kconfig"
957c5f80065SErik Gilling
95895b8f20fSRussell Kingsource "arch/arm/mach-u300/Kconfig"
9591da177e4SLinus Torvalds
96095b8f20fSRussell Kingsource "arch/arm/mach-ux500/Kconfig"
9611da177e4SLinus Torvalds
9621da177e4SLinus Torvaldssource "arch/arm/mach-versatile/Kconfig"
9631da177e4SLinus Torvalds
964ceade897SRussell Kingsource "arch/arm/mach-vexpress/Kconfig"
965420c34e4SRussell Kingsource "arch/arm/plat-versatile/Kconfig"
966ceade897SRussell King
9676f35f9a9STony Prisksource "arch/arm/mach-vt8500/Kconfig"
9686f35f9a9STony Prisk
9697ec80ddfSwanzongshunsource "arch/arm/mach-w90x900/Kconfig"
9707ec80ddfSwanzongshun
9719a45eb69SJosh Cartwrightsource "arch/arm/mach-zynq/Kconfig"
9729a45eb69SJosh Cartwright
9731da177e4SLinus Torvalds# Definitions to make life easier
9741da177e4SLinus Torvaldsconfig ARCH_ACORN
9751da177e4SLinus Torvalds	bool
9761da177e4SLinus Torvalds
9777ae1f7ecSLennert Buytenhekconfig PLAT_IOP
9787ae1f7ecSLennert Buytenhek	bool
979469d3044SMikael Pettersson	select GENERIC_CLOCKEVENTS
9807ae1f7ecSLennert Buytenhek
98169b02f6aSLennert Buytenhekconfig PLAT_ORION
98269b02f6aSLennert Buytenhek	bool
983bfe45e0bSRussell King	select CLKSRC_MMIO
984b1b3f49cSRussell King	select COMMON_CLK
985dc7ad3b3SRussell King	select GENERIC_IRQ_CHIP
986278b45b0SAndrew Lunn	select IRQ_DOMAIN
98769b02f6aSLennert Buytenhek
988abcda1dcSThomas Petazzoniconfig PLAT_ORION_LEGACY
989abcda1dcSThomas Petazzoni	bool
990abcda1dcSThomas Petazzoni	select PLAT_ORION
991abcda1dcSThomas Petazzoni
992bd5ce433SEric Miaoconfig PLAT_PXA
993bd5ce433SEric Miao	bool
994bd5ce433SEric Miao
995f4b8b319SRussell Kingconfig PLAT_VERSATILE
996f4b8b319SRussell King	bool
997f4b8b319SRussell King
998e3887714SRussell Kingconfig ARM_TIMER_SP804
999e3887714SRussell King	bool
1000bfe45e0bSRussell King	select CLKSRC_MMIO
10017a0eca71SRob Herring	select CLKSRC_OF if OF
1002e3887714SRussell King
1003d9a1beaaSAlexandre Courbotsource "arch/arm/firmware/Kconfig"
1004d9a1beaaSAlexandre Courbot
10051da177e4SLinus Torvaldssource arch/arm/mm/Kconfig
10061da177e4SLinus Torvalds
1007afe4b25eSLennert Buytenhekconfig IWMMXT
1008d93003e8SSebastian Hesselbarth	bool "Enable iWMMXt support"
1009d93003e8SSebastian Hesselbarth	depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4 || CPU_PJ4B
1010d93003e8SSebastian Hesselbarth	default y if PXA27x || PXA3xx || ARCH_MMP || CPU_PJ4 || CPU_PJ4B
1011afe4b25eSLennert Buytenhek	help
1012afe4b25eSLennert Buytenhek	  Enable support for iWMMXt context switching at run time if
1013afe4b25eSLennert Buytenhek	  running on a CPU that supports it.
1014afe4b25eSLennert Buytenhek
101552108641Seric miaoconfig MULTI_IRQ_HANDLER
101652108641Seric miao	bool
101752108641Seric miao	help
101852108641Seric miao	  Allow each machine to specify it's own IRQ handler at run time.
101952108641Seric miao
10203b93e7b0SHyok S. Choiif !MMU
10213b93e7b0SHyok S. Choisource "arch/arm/Kconfig-nommu"
10223b93e7b0SHyok S. Choiendif
10233b93e7b0SHyok S. Choi
10243e0a07f8SGregory CLEMENTconfig PJ4B_ERRATA_4742
10253e0a07f8SGregory CLEMENT	bool "PJ4B Errata 4742: IDLE Wake Up Commands can Cause the CPU Core to Cease Operation"
10263e0a07f8SGregory CLEMENT	depends on CPU_PJ4B && MACH_ARMADA_370
10273e0a07f8SGregory CLEMENT	default y
10283e0a07f8SGregory CLEMENT	help
10293e0a07f8SGregory CLEMENT	  When coming out of either a Wait for Interrupt (WFI) or a Wait for
10303e0a07f8SGregory CLEMENT	  Event (WFE) IDLE states, a specific timing sensitivity exists between
10313e0a07f8SGregory CLEMENT	  the retiring WFI/WFE instructions and the newly issued subsequent
10323e0a07f8SGregory CLEMENT	  instructions.  This sensitivity can result in a CPU hang scenario.
10333e0a07f8SGregory CLEMENT	  Workaround:
10343e0a07f8SGregory CLEMENT	  The software must insert either a Data Synchronization Barrier (DSB)
10353e0a07f8SGregory CLEMENT	  or Data Memory Barrier (DMB) command immediately after the WFI/WFE
10363e0a07f8SGregory CLEMENT	  instruction
10373e0a07f8SGregory CLEMENT
1038f0c4b8d6SWill Deaconconfig ARM_ERRATA_326103
1039f0c4b8d6SWill Deacon	bool "ARM errata: FSR write bit incorrect on a SWP to read-only memory"
1040f0c4b8d6SWill Deacon	depends on CPU_V6
1041f0c4b8d6SWill Deacon	help
1042f0c4b8d6SWill Deacon	  Executing a SWP instruction to read-only memory does not set bit 11
1043f0c4b8d6SWill Deacon	  of the FSR on the ARM 1136 prior to r1p0. This causes the kernel to
1044f0c4b8d6SWill Deacon	  treat the access as a read, preventing a COW from occurring and
1045f0c4b8d6SWill Deacon	  causing the faulting task to livelock.
1046f0c4b8d6SWill Deacon
10479cba3cccSCatalin Marinasconfig ARM_ERRATA_411920
10489cba3cccSCatalin Marinas	bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
1049e399b1a4SRussell King	depends on CPU_V6 || CPU_V6K
10509cba3cccSCatalin Marinas	help
10519cba3cccSCatalin Marinas	  Invalidation of the Instruction Cache operation can
10529cba3cccSCatalin Marinas	  fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
10539cba3cccSCatalin Marinas	  It does not affect the MPCore. This option enables the ARM Ltd.
10549cba3cccSCatalin Marinas	  recommended workaround.
10559cba3cccSCatalin Marinas
10567ce236fcSCatalin Marinasconfig ARM_ERRATA_430973
10577ce236fcSCatalin Marinas	bool "ARM errata: Stale prediction on replaced interworking branch"
10587ce236fcSCatalin Marinas	depends on CPU_V7
10597ce236fcSCatalin Marinas	help
10607ce236fcSCatalin Marinas	  This option enables the workaround for the 430973 Cortex-A8
10617ce236fcSCatalin Marinas	  (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
10627ce236fcSCatalin Marinas	  interworking branch is replaced with another code sequence at the
10637ce236fcSCatalin Marinas	  same virtual address, whether due to self-modifying code or virtual
10647ce236fcSCatalin Marinas	  to physical address re-mapping, Cortex-A8 does not recover from the
10657ce236fcSCatalin Marinas	  stale interworking branch prediction. This results in Cortex-A8
10667ce236fcSCatalin Marinas	  executing the new code sequence in the incorrect ARM or Thumb state.
10677ce236fcSCatalin Marinas	  The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
10687ce236fcSCatalin Marinas	  and also flushes the branch target cache at every context switch.
10697ce236fcSCatalin Marinas	  Note that setting specific bits in the ACTLR register may not be
10707ce236fcSCatalin Marinas	  available in non-secure mode.
10717ce236fcSCatalin Marinas
1072855c551fSCatalin Marinasconfig ARM_ERRATA_458693
1073855c551fSCatalin Marinas	bool "ARM errata: Processor deadlock when a false hazard is created"
1074855c551fSCatalin Marinas	depends on CPU_V7
107562e4d357SRob Herring	depends on !ARCH_MULTIPLATFORM
1076855c551fSCatalin Marinas	help
1077855c551fSCatalin Marinas	  This option enables the workaround for the 458693 Cortex-A8 (r2p0)
1078855c551fSCatalin Marinas	  erratum. For very specific sequences of memory operations, it is
1079855c551fSCatalin Marinas	  possible for a hazard condition intended for a cache line to instead
1080855c551fSCatalin Marinas	  be incorrectly associated with a different cache line. This false
1081855c551fSCatalin Marinas	  hazard might then cause a processor deadlock. The workaround enables
1082855c551fSCatalin Marinas	  the L1 caching of the NEON accesses and disables the PLD instruction
1083855c551fSCatalin Marinas	  in the ACTLR register. Note that setting specific bits in the ACTLR
1084855c551fSCatalin Marinas	  register may not be available in non-secure mode.
1085855c551fSCatalin Marinas
10860516e464SCatalin Marinasconfig ARM_ERRATA_460075
10870516e464SCatalin Marinas	bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
10880516e464SCatalin Marinas	depends on CPU_V7
108962e4d357SRob Herring	depends on !ARCH_MULTIPLATFORM
10900516e464SCatalin Marinas	help
10910516e464SCatalin Marinas	  This option enables the workaround for the 460075 Cortex-A8 (r2p0)
10920516e464SCatalin Marinas	  erratum. Any asynchronous access to the L2 cache may encounter a
10930516e464SCatalin Marinas	  situation in which recent store transactions to the L2 cache are lost
10940516e464SCatalin Marinas	  and overwritten with stale memory contents from external memory. The
10950516e464SCatalin Marinas	  workaround disables the write-allocate mode for the L2 cache via the
10960516e464SCatalin Marinas	  ACTLR register. Note that setting specific bits in the ACTLR register
10970516e464SCatalin Marinas	  may not be available in non-secure mode.
10980516e464SCatalin Marinas
10999f05027cSWill Deaconconfig ARM_ERRATA_742230
11009f05027cSWill Deacon	bool "ARM errata: DMB operation may be faulty"
11019f05027cSWill Deacon	depends on CPU_V7 && SMP
110262e4d357SRob Herring	depends on !ARCH_MULTIPLATFORM
11039f05027cSWill Deacon	help
11049f05027cSWill Deacon	  This option enables the workaround for the 742230 Cortex-A9
11059f05027cSWill Deacon	  (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
11069f05027cSWill Deacon	  between two write operations may not ensure the correct visibility
11079f05027cSWill Deacon	  ordering of the two writes. This workaround sets a specific bit in
11089f05027cSWill Deacon	  the diagnostic register of the Cortex-A9 which causes the DMB
11099f05027cSWill Deacon	  instruction to behave as a DSB, ensuring the correct behaviour of
11109f05027cSWill Deacon	  the two writes.
11119f05027cSWill Deacon
1112a672e99bSWill Deaconconfig ARM_ERRATA_742231
1113a672e99bSWill Deacon	bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
1114a672e99bSWill Deacon	depends on CPU_V7 && SMP
111562e4d357SRob Herring	depends on !ARCH_MULTIPLATFORM
1116a672e99bSWill Deacon	help
1117a672e99bSWill Deacon	  This option enables the workaround for the 742231 Cortex-A9
1118a672e99bSWill Deacon	  (r2p0..r2p2) erratum. Under certain conditions, specific to the
1119a672e99bSWill Deacon	  Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
1120a672e99bSWill Deacon	  accessing some data located in the same cache line, may get corrupted
1121a672e99bSWill Deacon	  data due to bad handling of the address hazard when the line gets
1122a672e99bSWill Deacon	  replaced from one of the CPUs at the same time as another CPU is
1123a672e99bSWill Deacon	  accessing it. This workaround sets specific bits in the diagnostic
1124a672e99bSWill Deacon	  register of the Cortex-A9 which reduces the linefill issuing
1125a672e99bSWill Deacon	  capabilities of the processor.
1126a672e99bSWill Deacon
112769155794SJon Medhurstconfig ARM_ERRATA_643719
112869155794SJon Medhurst	bool "ARM errata: LoUIS bit field in CLIDR register is incorrect"
112969155794SJon Medhurst	depends on CPU_V7 && SMP
113069155794SJon Medhurst	help
113169155794SJon Medhurst	  This option enables the workaround for the 643719 Cortex-A9 (prior to
113269155794SJon Medhurst	  r1p0) erratum. On affected cores the LoUIS bit field of the CLIDR
113369155794SJon Medhurst	  register returns zero when it should return one. The workaround
113469155794SJon Medhurst	  corrects this value, ensuring cache maintenance operations which use
113569155794SJon Medhurst	  it behave as intended and avoiding data corruption.
113669155794SJon Medhurst
1137cdf357f1SWill Deaconconfig ARM_ERRATA_720789
1138cdf357f1SWill Deacon	bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
1139e66dc745SDave Martin	depends on CPU_V7
1140cdf357f1SWill Deacon	help
1141cdf357f1SWill Deacon	  This option enables the workaround for the 720789 Cortex-A9 (prior to
1142cdf357f1SWill Deacon	  r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
1143cdf357f1SWill Deacon	  broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
1144cdf357f1SWill Deacon	  As a consequence of this erratum, some TLB entries which should be
1145cdf357f1SWill Deacon	  invalidated are not, resulting in an incoherency in the system page
1146cdf357f1SWill Deacon	  tables. The workaround changes the TLB flushing routines to invalidate
1147cdf357f1SWill Deacon	  entries regardless of the ASID.
1148475d92fcSWill Deacon
1149475d92fcSWill Deaconconfig ARM_ERRATA_743622
1150475d92fcSWill Deacon	bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
1151475d92fcSWill Deacon	depends on CPU_V7
115262e4d357SRob Herring	depends on !ARCH_MULTIPLATFORM
1153475d92fcSWill Deacon	help
1154475d92fcSWill Deacon	  This option enables the workaround for the 743622 Cortex-A9
1155efbc74acSWill Deacon	  (r2p*) erratum. Under very rare conditions, a faulty
1156475d92fcSWill Deacon	  optimisation in the Cortex-A9 Store Buffer may lead to data
1157475d92fcSWill Deacon	  corruption. This workaround sets a specific bit in the diagnostic
1158475d92fcSWill Deacon	  register of the Cortex-A9 which disables the Store Buffer
1159475d92fcSWill Deacon	  optimisation, preventing the defect from occurring. This has no
1160475d92fcSWill Deacon	  visible impact on the overall performance or power consumption of the
1161475d92fcSWill Deacon	  processor.
1162475d92fcSWill Deacon
11639a27c27cSWill Deaconconfig ARM_ERRATA_751472
11649a27c27cSWill Deacon	bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
1165ba90c516SDave Martin	depends on CPU_V7
116662e4d357SRob Herring	depends on !ARCH_MULTIPLATFORM
11679a27c27cSWill Deacon	help
11689a27c27cSWill Deacon	  This option enables the workaround for the 751472 Cortex-A9 (prior
11699a27c27cSWill Deacon	  to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
11709a27c27cSWill Deacon	  completion of a following broadcasted operation if the second
11719a27c27cSWill Deacon	  operation is received by a CPU before the ICIALLUIS has completed,
11729a27c27cSWill Deacon	  potentially leading to corrupted entries in the cache or TLB.
11739a27c27cSWill Deacon
1174fcbdc5feSWill Deaconconfig ARM_ERRATA_754322
1175fcbdc5feSWill Deacon	bool "ARM errata: possible faulty MMU translations following an ASID switch"
1176fcbdc5feSWill Deacon	depends on CPU_V7
1177fcbdc5feSWill Deacon	help
1178fcbdc5feSWill Deacon	  This option enables the workaround for the 754322 Cortex-A9 (r2p*,
1179fcbdc5feSWill Deacon	  r3p*) erratum. A speculative memory access may cause a page table walk
1180fcbdc5feSWill Deacon	  which starts prior to an ASID switch but completes afterwards. This
1181fcbdc5feSWill Deacon	  can populate the micro-TLB with a stale entry which may be hit with
1182fcbdc5feSWill Deacon	  the new ASID. This workaround places two dsb instructions in the mm
1183fcbdc5feSWill Deacon	  switching code so that no page table walks can cross the ASID switch.
1184fcbdc5feSWill Deacon
11855dab26afSWill Deaconconfig ARM_ERRATA_754327
11865dab26afSWill Deacon	bool "ARM errata: no automatic Store Buffer drain"
11875dab26afSWill Deacon	depends on CPU_V7 && SMP
11885dab26afSWill Deacon	help
11895dab26afSWill Deacon	  This option enables the workaround for the 754327 Cortex-A9 (prior to
11905dab26afSWill Deacon	  r2p0) erratum. The Store Buffer does not have any automatic draining
11915dab26afSWill Deacon	  mechanism and therefore a livelock may occur if an external agent
11925dab26afSWill Deacon	  continuously polls a memory location waiting to observe an update.
11935dab26afSWill Deacon	  This workaround defines cpu_relax() as smp_mb(), preventing correctly
11945dab26afSWill Deacon	  written polling loops from denying visibility of updates to memory.
11955dab26afSWill Deacon
1196145e10e1SCatalin Marinasconfig ARM_ERRATA_364296
1197145e10e1SCatalin Marinas	bool "ARM errata: Possible cache data corruption with hit-under-miss enabled"
1198fd832478SFabio Estevam	depends on CPU_V6
1199145e10e1SCatalin Marinas	help
1200145e10e1SCatalin Marinas	  This options enables the workaround for the 364296 ARM1136
1201145e10e1SCatalin Marinas	  r0p2 erratum (possible cache data corruption with
1202145e10e1SCatalin Marinas	  hit-under-miss enabled). It sets the undocumented bit 31 in
1203145e10e1SCatalin Marinas	  the auxiliary control register and the FI bit in the control
1204145e10e1SCatalin Marinas	  register, thus disabling hit-under-miss without putting the
1205145e10e1SCatalin Marinas	  processor into full low interrupt latency mode. ARM11MPCore
1206145e10e1SCatalin Marinas	  is not affected.
1207145e10e1SCatalin Marinas
1208f630c1bdSWill Deaconconfig ARM_ERRATA_764369
1209f630c1bdSWill Deacon	bool "ARM errata: Data cache line maintenance operation by MVA may not succeed"
1210f630c1bdSWill Deacon	depends on CPU_V7 && SMP
1211f630c1bdSWill Deacon	help
1212f630c1bdSWill Deacon	  This option enables the workaround for erratum 764369
1213f630c1bdSWill Deacon	  affecting Cortex-A9 MPCore with two or more processors (all
1214f630c1bdSWill Deacon	  current revisions). Under certain timing circumstances, a data
1215f630c1bdSWill Deacon	  cache line maintenance operation by MVA targeting an Inner
1216f630c1bdSWill Deacon	  Shareable memory region may fail to proceed up to either the
1217f630c1bdSWill Deacon	  Point of Coherency or to the Point of Unification of the
1218f630c1bdSWill Deacon	  system. This workaround adds a DSB instruction before the
1219f630c1bdSWill Deacon	  relevant cache maintenance functions and sets a specific bit
1220f630c1bdSWill Deacon	  in the diagnostic control register of the SCU.
1221f630c1bdSWill Deacon
12227253b85cSSimon Hormanconfig ARM_ERRATA_775420
12237253b85cSSimon Horman       bool "ARM errata: A data cache maintenance operation which aborts, might lead to deadlock"
12247253b85cSSimon Horman       depends on CPU_V7
12257253b85cSSimon Horman       help
12267253b85cSSimon Horman	 This option enables the workaround for the 775420 Cortex-A9 (r2p2,
12277253b85cSSimon Horman	 r2p6,r2p8,r2p10,r3p0) erratum. In case a date cache maintenance
12287253b85cSSimon Horman	 operation aborts with MMU exception, it might cause the processor
12297253b85cSSimon Horman	 to deadlock. This workaround puts DSB before executing ISB if
12307253b85cSSimon Horman	 an abort may occur on cache maintenance.
12317253b85cSSimon Horman
123293dc6887SCatalin Marinasconfig ARM_ERRATA_798181
123393dc6887SCatalin Marinas	bool "ARM errata: TLBI/DSB failure on Cortex-A15"
123493dc6887SCatalin Marinas	depends on CPU_V7 && SMP
123593dc6887SCatalin Marinas	help
123693dc6887SCatalin Marinas	  On Cortex-A15 (r0p0..r3p2) the TLBI*IS/DSB operations are not
123793dc6887SCatalin Marinas	  adequately shooting down all use of the old entries. This
123893dc6887SCatalin Marinas	  option enables the Linux kernel workaround for this erratum
123993dc6887SCatalin Marinas	  which sends an IPI to the CPUs that are running the same ASID
124093dc6887SCatalin Marinas	  as the one being invalidated.
124193dc6887SCatalin Marinas
124284b6504fSWill Deaconconfig ARM_ERRATA_773022
124384b6504fSWill Deacon	bool "ARM errata: incorrect instructions may be executed from loop buffer"
124484b6504fSWill Deacon	depends on CPU_V7
124584b6504fSWill Deacon	help
124684b6504fSWill Deacon	  This option enables the workaround for the 773022 Cortex-A15
124784b6504fSWill Deacon	  (up to r0p4) erratum. In certain rare sequences of code, the
124884b6504fSWill Deacon	  loop buffer may deliver incorrect instructions. This
124984b6504fSWill Deacon	  workaround disables the loop buffer to avoid the erratum.
125084b6504fSWill Deacon
12511da177e4SLinus Torvaldsendmenu
12521da177e4SLinus Torvalds
12531da177e4SLinus Torvaldssource "arch/arm/common/Kconfig"
12541da177e4SLinus Torvalds
12551da177e4SLinus Torvaldsmenu "Bus support"
12561da177e4SLinus Torvalds
12571da177e4SLinus Torvaldsconfig ARM_AMBA
12581da177e4SLinus Torvalds	bool
12591da177e4SLinus Torvalds
12601da177e4SLinus Torvaldsconfig ISA
12611da177e4SLinus Torvalds	bool
12621da177e4SLinus Torvalds	help
12631da177e4SLinus Torvalds	  Find out whether you have ISA slots on your motherboard.  ISA is the
12641da177e4SLinus Torvalds	  name of a bus system, i.e. the way the CPU talks to the other stuff
12651da177e4SLinus Torvalds	  inside your box.  Other bus systems are PCI, EISA, MicroChannel
12661da177e4SLinus Torvalds	  (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
12671da177e4SLinus Torvalds	  newer boards don't support it.  If you have ISA, say Y, otherwise N.
12681da177e4SLinus Torvalds
1269065909b9SRussell King# Select ISA DMA controller support
12701da177e4SLinus Torvaldsconfig ISA_DMA
12711da177e4SLinus Torvalds	bool
1272065909b9SRussell King	select ISA_DMA_API
12731da177e4SLinus Torvalds
1274065909b9SRussell King# Select ISA DMA interface
12755cae841bSAl Viroconfig ISA_DMA_API
12765cae841bSAl Viro	bool
12775cae841bSAl Viro
12781da177e4SLinus Torvaldsconfig PCI
12790b05da72SHans Ulli Kroll	bool "PCI support" if MIGHT_HAVE_PCI
12801da177e4SLinus Torvalds	help
12811da177e4SLinus Torvalds	  Find out whether you have a PCI motherboard. PCI is the name of a
12821da177e4SLinus Torvalds	  bus system, i.e. the way the CPU talks to the other stuff inside
12831da177e4SLinus Torvalds	  your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
12841da177e4SLinus Torvalds	  VESA. If you have PCI, say Y, otherwise N.
12851da177e4SLinus Torvalds
128652882173SAnton Vorontsovconfig PCI_DOMAINS
128752882173SAnton Vorontsov	bool
128852882173SAnton Vorontsov	depends on PCI
128952882173SAnton Vorontsov
1290b080ac8aSMarcelo Roberto Jimenezconfig PCI_NANOENGINE
1291b080ac8aSMarcelo Roberto Jimenez	bool "BSE nanoEngine PCI support"
1292b080ac8aSMarcelo Roberto Jimenez	depends on SA1100_NANOENGINE
1293b080ac8aSMarcelo Roberto Jimenez	help
1294b080ac8aSMarcelo Roberto Jimenez	  Enable PCI on the BSE nanoEngine board.
1295b080ac8aSMarcelo Roberto Jimenez
129636e23590SMatthew Wilcoxconfig PCI_SYSCALL
129736e23590SMatthew Wilcox	def_bool PCI
129836e23590SMatthew Wilcox
1299a0113a99SMike Rapoportconfig PCI_HOST_ITE8152
1300a0113a99SMike Rapoport	bool
1301a0113a99SMike Rapoport	depends on PCI && MACH_ARMCORE
1302a0113a99SMike Rapoport	default y
1303a0113a99SMike Rapoport	select DMABOUNCE
1304a0113a99SMike Rapoport
13051da177e4SLinus Torvaldssource "drivers/pci/Kconfig"
13063f06d157SJingoo Hansource "drivers/pci/pcie/Kconfig"
13071da177e4SLinus Torvalds
13081da177e4SLinus Torvaldssource "drivers/pcmcia/Kconfig"
13091da177e4SLinus Torvalds
13101da177e4SLinus Torvaldsendmenu
13111da177e4SLinus Torvalds
13121da177e4SLinus Torvaldsmenu "Kernel Features"
13131da177e4SLinus Torvalds
13143b55658aSDave Martinconfig HAVE_SMP
13153b55658aSDave Martin	bool
13163b55658aSDave Martin	help
13173b55658aSDave Martin	  This option should be selected by machines which have an SMP-
13183b55658aSDave Martin	  capable CPU.
13193b55658aSDave Martin
13203b55658aSDave Martin	  The only effect of this option is to make the SMP-related
13213b55658aSDave Martin	  options available to the user for configuration.
13223b55658aSDave Martin
13231da177e4SLinus Torvaldsconfig SMP
1324bb2d8130SRussell King	bool "Symmetric Multi-Processing"
1325fbb4ddacSRussell King	depends on CPU_V6K || CPU_V7
1326bc28248eSRussell King	depends on GENERIC_CLOCKEVENTS
13273b55658aSDave Martin	depends on HAVE_SMP
1328801bb21cSJonathan Austin	depends on MMU || ARM_MPU
13291da177e4SLinus Torvalds	help
13301da177e4SLinus Torvalds	  This enables support for systems with more than one CPU. If you have
13314a474157SRobert Graffham	  a system with only one CPU, say N. If you have a system with more
13324a474157SRobert Graffham	  than one CPU, say Y.
13331da177e4SLinus Torvalds
13344a474157SRobert Graffham	  If you say N here, the kernel will run on uni- and multiprocessor
13351da177e4SLinus Torvalds	  machines, but will use only one CPU of a multiprocessor machine. If
13364a474157SRobert Graffham	  you say Y here, the kernel will run on many, but not all,
13374a474157SRobert Graffham	  uniprocessor machines. On a uniprocessor machine, the kernel
13384a474157SRobert Graffham	  will run faster if you say N here.
13391da177e4SLinus Torvalds
1340395cf969SPaul Bolle	  See also <file:Documentation/x86/i386/IO-APIC.txt>,
13411da177e4SLinus Torvalds	  <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
134250a23e6eSJustin P. Mattock	  <http://tldp.org/HOWTO/SMP-HOWTO.html>.
13431da177e4SLinus Torvalds
13441da177e4SLinus Torvalds	  If you don't know what to do here, say N.
13451da177e4SLinus Torvalds
1346f00ec48fSRussell Kingconfig SMP_ON_UP
1347f00ec48fSRussell King	bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
1348801bb21cSJonathan Austin	depends on SMP && !XIP_KERNEL && MMU
1349f00ec48fSRussell King	default y
1350f00ec48fSRussell King	help
1351f00ec48fSRussell King	  SMP kernels contain instructions which fail on non-SMP processors.
1352f00ec48fSRussell King	  Enabling this option allows the kernel to modify itself to make
1353f00ec48fSRussell King	  these instructions safe.  Disabling it allows about 1K of space
1354f00ec48fSRussell King	  savings.
1355f00ec48fSRussell King
1356f00ec48fSRussell King	  If you don't know what to do here, say Y.
1357f00ec48fSRussell King
1358c9018aabSVincent Guittotconfig ARM_CPU_TOPOLOGY
1359c9018aabSVincent Guittot	bool "Support cpu topology definition"
1360c9018aabSVincent Guittot	depends on SMP && CPU_V7
1361c9018aabSVincent Guittot	default y
1362c9018aabSVincent Guittot	help
1363c9018aabSVincent Guittot	  Support ARM cpu topology definition. The MPIDR register defines
1364c9018aabSVincent Guittot	  affinity between processors which is then used to describe the cpu
1365c9018aabSVincent Guittot	  topology of an ARM System.
1366c9018aabSVincent Guittot
1367c9018aabSVincent Guittotconfig SCHED_MC
1368c9018aabSVincent Guittot	bool "Multi-core scheduler support"
1369c9018aabSVincent Guittot	depends on ARM_CPU_TOPOLOGY
1370c9018aabSVincent Guittot	help
1371c9018aabSVincent Guittot	  Multi-core scheduler support improves the CPU scheduler's decision
1372c9018aabSVincent Guittot	  making when dealing with multi-core CPU chips at a cost of slightly
1373c9018aabSVincent Guittot	  increased overhead in some places. If unsure say N here.
1374c9018aabSVincent Guittot
1375c9018aabSVincent Guittotconfig SCHED_SMT
1376c9018aabSVincent Guittot	bool "SMT scheduler support"
1377c9018aabSVincent Guittot	depends on ARM_CPU_TOPOLOGY
1378c9018aabSVincent Guittot	help
1379c9018aabSVincent Guittot	  Improves the CPU scheduler's decision making when dealing with
1380c9018aabSVincent Guittot	  MultiThreading at a cost of slightly increased overhead in some
1381c9018aabSVincent Guittot	  places. If unsure say N here.
1382c9018aabSVincent Guittot
1383a8cbcd92SRussell Kingconfig HAVE_ARM_SCU
1384a8cbcd92SRussell King	bool
1385a8cbcd92SRussell King	help
1386a8cbcd92SRussell King	  This option enables support for the ARM system coherency unit
1387a8cbcd92SRussell King
13888a4da6e3SMark Rutlandconfig HAVE_ARM_ARCH_TIMER
1389022c03a2SMarc Zyngier	bool "Architected timer support"
1390022c03a2SMarc Zyngier	depends on CPU_V7
13918a4da6e3SMark Rutland	select ARM_ARCH_TIMER
13920c403462SWill Deacon	select GENERIC_CLOCKEVENTS
1393022c03a2SMarc Zyngier	help
1394022c03a2SMarc Zyngier	  This option enables support for the ARM architected timer
1395022c03a2SMarc Zyngier
1396f32f4ce2SRussell Kingconfig HAVE_ARM_TWD
1397f32f4ce2SRussell King	bool
1398f32f4ce2SRussell King	depends on SMP
1399da4a686aSRob Herring	select CLKSRC_OF if OF
1400f32f4ce2SRussell King	help
1401f32f4ce2SRussell King	  This options enables support for the ARM timer and watchdog unit
1402f32f4ce2SRussell King
1403e8db288eSNicolas Pitreconfig MCPM
1404e8db288eSNicolas Pitre	bool "Multi-Cluster Power Management"
1405e8db288eSNicolas Pitre	depends on CPU_V7 && SMP
1406e8db288eSNicolas Pitre	help
1407e8db288eSNicolas Pitre	  This option provides the common power management infrastructure
1408e8db288eSNicolas Pitre	  for (multi-)cluster based systems, such as big.LITTLE based
1409e8db288eSNicolas Pitre	  systems.
1410e8db288eSNicolas Pitre
1411ebf4a5c5SHaojian Zhuangconfig MCPM_QUAD_CLUSTER
1412ebf4a5c5SHaojian Zhuang	bool
1413ebf4a5c5SHaojian Zhuang	depends on MCPM
1414ebf4a5c5SHaojian Zhuang	help
1415ebf4a5c5SHaojian Zhuang	  To avoid wasting resources unnecessarily, MCPM only supports up
1416ebf4a5c5SHaojian Zhuang	  to 2 clusters by default.
1417ebf4a5c5SHaojian Zhuang	  Platforms with 3 or 4 clusters that use MCPM must select this
1418ebf4a5c5SHaojian Zhuang	  option to allow the additional clusters to be managed.
1419ebf4a5c5SHaojian Zhuang
14201c33be57SNicolas Pitreconfig BIG_LITTLE
14211c33be57SNicolas Pitre	bool "big.LITTLE support (Experimental)"
14221c33be57SNicolas Pitre	depends on CPU_V7 && SMP
14231c33be57SNicolas Pitre	select MCPM
14241c33be57SNicolas Pitre	help
14251c33be57SNicolas Pitre	  This option enables support selections for the big.LITTLE
14261c33be57SNicolas Pitre	  system architecture.
14271c33be57SNicolas Pitre
14281c33be57SNicolas Pitreconfig BL_SWITCHER
14291c33be57SNicolas Pitre	bool "big.LITTLE switcher support"
14301c33be57SNicolas Pitre	depends on BIG_LITTLE && MCPM && HOTPLUG_CPU
14311c33be57SNicolas Pitre	select ARM_CPU_SUSPEND
143251aaf81fSRussell King	select CPU_PM
14331c33be57SNicolas Pitre	help
14341c33be57SNicolas Pitre	  The big.LITTLE "switcher" provides the core functionality to
14351c33be57SNicolas Pitre	  transparently handle transition between a cluster of A15's
14361c33be57SNicolas Pitre	  and a cluster of A7's in a big.LITTLE system.
14371c33be57SNicolas Pitre
1438b22537c6SNicolas Pitreconfig BL_SWITCHER_DUMMY_IF
1439b22537c6SNicolas Pitre	tristate "Simple big.LITTLE switcher user interface"
1440b22537c6SNicolas Pitre	depends on BL_SWITCHER && DEBUG_KERNEL
1441b22537c6SNicolas Pitre	help
1442b22537c6SNicolas Pitre	  This is a simple and dummy char dev interface to control
1443b22537c6SNicolas Pitre	  the big.LITTLE switcher core code.  It is meant for
1444b22537c6SNicolas Pitre	  debugging purposes only.
1445b22537c6SNicolas Pitre
14468d5796d2SLennert Buytenhekchoice
14478d5796d2SLennert Buytenhek	prompt "Memory split"
1448006fa259SRussell King	depends on MMU
14498d5796d2SLennert Buytenhek	default VMSPLIT_3G
14508d5796d2SLennert Buytenhek	help
14518d5796d2SLennert Buytenhek	  Select the desired split between kernel and user memory.
14528d5796d2SLennert Buytenhek
14538d5796d2SLennert Buytenhek	  If you are not absolutely sure what you are doing, leave this
14548d5796d2SLennert Buytenhek	  option alone!
14558d5796d2SLennert Buytenhek
14568d5796d2SLennert Buytenhek	config VMSPLIT_3G
14578d5796d2SLennert Buytenhek		bool "3G/1G user/kernel split"
14588d5796d2SLennert Buytenhek	config VMSPLIT_2G
14598d5796d2SLennert Buytenhek		bool "2G/2G user/kernel split"
14608d5796d2SLennert Buytenhek	config VMSPLIT_1G
14618d5796d2SLennert Buytenhek		bool "1G/3G user/kernel split"
14628d5796d2SLennert Buytenhekendchoice
14638d5796d2SLennert Buytenhek
14648d5796d2SLennert Buytenhekconfig PAGE_OFFSET
14658d5796d2SLennert Buytenhek	hex
1466006fa259SRussell King	default PHYS_OFFSET if !MMU
14678d5796d2SLennert Buytenhek	default 0x40000000 if VMSPLIT_1G
14688d5796d2SLennert Buytenhek	default 0x80000000 if VMSPLIT_2G
14698d5796d2SLennert Buytenhek	default 0xC0000000
14708d5796d2SLennert Buytenhek
14711da177e4SLinus Torvaldsconfig NR_CPUS
14721da177e4SLinus Torvalds	int "Maximum number of CPUs (2-32)"
14731da177e4SLinus Torvalds	range 2 32
14741da177e4SLinus Torvalds	depends on SMP
14751da177e4SLinus Torvalds	default "4"
14761da177e4SLinus Torvalds
1477a054a811SRussell Kingconfig HOTPLUG_CPU
147800b7dedeSRussell King	bool "Support for hot-pluggable CPUs"
147940b31360SStephen Rothwell	depends on SMP
1480a054a811SRussell King	help
1481a054a811SRussell King	  Say Y here to experiment with turning CPUs off and on.  CPUs
1482a054a811SRussell King	  can be controlled through /sys/devices/system/cpu.
1483a054a811SRussell King
14842bdd424fSWill Deaconconfig ARM_PSCI
14852bdd424fSWill Deacon	bool "Support for the ARM Power State Coordination Interface (PSCI)"
14862bdd424fSWill Deacon	depends on CPU_V7
14872bdd424fSWill Deacon	help
14882bdd424fSWill Deacon	  Say Y here if you want Linux to communicate with system firmware
14892bdd424fSWill Deacon	  implementing the PSCI specification for CPU-centric power
14902bdd424fSWill Deacon	  management operations described in ARM document number ARM DEN
14912bdd424fSWill Deacon	  0022A ("Power State Coordination Interface System Software on
14922bdd424fSWill Deacon	  ARM processors").
14932bdd424fSWill Deacon
14942a6ad871SMaxime Ripard# The GPIO number here must be sorted by descending number. In case of
14952a6ad871SMaxime Ripard# a multiplatform kernel, we just want the highest value required by the
14962a6ad871SMaxime Ripard# selected platforms.
149744986ab0SPeter De Schrijver (NVIDIA)config ARCH_NR_GPIO
149844986ab0SPeter De Schrijver (NVIDIA)	int
14993dea19e8SPeter De Schrijver (NVIDIA)	default 1024 if ARCH_SHMOBILE || ARCH_TEGRA
1500aa42587aSTomasz Figa	default 512 if ARCH_EXYNOS || ARCH_KEYSTONE || SOC_OMAP5 || \
1501aa42587aSTomasz Figa		SOC_DRA7XX || ARCH_S3C24XX || ARCH_S3C64XX || ARCH_S5PV210
1502eb171a99SBoris BREZILLON	default 416 if ARCH_SUNXI
150306b851e5SOlof Johansson	default 392 if ARCH_U8500
150401bb914cSTony Prisk	default 352 if ARCH_VT8500
15057b5da4c3SHeiko Stuebner	default 288 if ARCH_ROCKCHIP
15062a6ad871SMaxime Ripard	default 264 if MACH_H4700
150744986ab0SPeter De Schrijver (NVIDIA)	default 0
150844986ab0SPeter De Schrijver (NVIDIA)	help
150944986ab0SPeter De Schrijver (NVIDIA)	  Maximum number of GPIOs in the system.
151044986ab0SPeter De Schrijver (NVIDIA)
151144986ab0SPeter De Schrijver (NVIDIA)	  If unsure, leave the default value.
151244986ab0SPeter De Schrijver (NVIDIA)
1513d45a398fSUwe Kleine-Königsource kernel/Kconfig.preempt
15141da177e4SLinus Torvalds
1515c9218b16SRussell Kingconfig HZ_FIXED
1516f8065813SRussell King	int
1517070b8b43SKukjin Kim	default 200 if ARCH_EBSA110 || ARCH_S3C24XX || \
1518a73ddc61SKukjin Kim		ARCH_S5PV210 || ARCH_EXYNOS4
15195248c657SDavid Brownell	default AT91_TIMER_HZ if ARCH_AT91
1520bf98c1eaSLaurent Pinchart	default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE_LEGACY
152147d84682SRussell King	default 0
1522c9218b16SRussell King
1523c9218b16SRussell Kingchoice
152447d84682SRussell King	depends on HZ_FIXED = 0
1525c9218b16SRussell King	prompt "Timer frequency"
1526c9218b16SRussell King
1527c9218b16SRussell Kingconfig HZ_100
1528c9218b16SRussell King	bool "100 Hz"
1529c9218b16SRussell King
1530c9218b16SRussell Kingconfig HZ_200
1531c9218b16SRussell King	bool "200 Hz"
1532c9218b16SRussell King
1533c9218b16SRussell Kingconfig HZ_250
1534c9218b16SRussell King	bool "250 Hz"
1535c9218b16SRussell King
1536c9218b16SRussell Kingconfig HZ_300
1537c9218b16SRussell King	bool "300 Hz"
1538c9218b16SRussell King
1539c9218b16SRussell Kingconfig HZ_500
1540c9218b16SRussell King	bool "500 Hz"
1541c9218b16SRussell King
1542c9218b16SRussell Kingconfig HZ_1000
1543c9218b16SRussell King	bool "1000 Hz"
1544c9218b16SRussell King
1545c9218b16SRussell Kingendchoice
1546c9218b16SRussell King
1547c9218b16SRussell Kingconfig HZ
1548c9218b16SRussell King	int
154947d84682SRussell King	default HZ_FIXED if HZ_FIXED != 0
1550c9218b16SRussell King	default 100 if HZ_100
1551c9218b16SRussell King	default 200 if HZ_200
1552c9218b16SRussell King	default 250 if HZ_250
1553c9218b16SRussell King	default 300 if HZ_300
1554c9218b16SRussell King	default 500 if HZ_500
1555c9218b16SRussell King	default 1000
1556c9218b16SRussell King
1557c9218b16SRussell Kingconfig SCHED_HRTICK
1558c9218b16SRussell King	def_bool HIGH_RES_TIMERS
1559f8065813SRussell King
156016c79651SCatalin Marinasconfig THUMB2_KERNEL
1561bc7dea00SUwe Kleine-König	bool "Compile the kernel in Thumb-2 mode" if !CPU_THUMBONLY
15624477ca45SUwe Kleine-König	depends on (CPU_V7 || CPU_V7M) && !CPU_V6 && !CPU_V6K
1563bc7dea00SUwe Kleine-König	default y if CPU_THUMBONLY
156416c79651SCatalin Marinas	select AEABI
156516c79651SCatalin Marinas	select ARM_ASM_UNIFIED
156689bace65SArnd Bergmann	select ARM_UNWIND
156716c79651SCatalin Marinas	help
156816c79651SCatalin Marinas	  By enabling this option, the kernel will be compiled in
156916c79651SCatalin Marinas	  Thumb-2 mode. A compiler/assembler that understand the unified
157016c79651SCatalin Marinas	  ARM-Thumb syntax is needed.
157116c79651SCatalin Marinas
157216c79651SCatalin Marinas	  If unsure, say N.
157316c79651SCatalin Marinas
15746f685c5cSDave Martinconfig THUMB2_AVOID_R_ARM_THM_JUMP11
15756f685c5cSDave Martin	bool "Work around buggy Thumb-2 short branch relocations in gas"
15766f685c5cSDave Martin	depends on THUMB2_KERNEL && MODULES
15776f685c5cSDave Martin	default y
15786f685c5cSDave Martin	help
15796f685c5cSDave Martin	  Various binutils versions can resolve Thumb-2 branches to
15806f685c5cSDave Martin	  locally-defined, preemptible global symbols as short-range "b.n"
15816f685c5cSDave Martin	  branch instructions.
15826f685c5cSDave Martin
15836f685c5cSDave Martin	  This is a problem, because there's no guarantee the final
15846f685c5cSDave Martin	  destination of the symbol, or any candidate locations for a
15856f685c5cSDave Martin	  trampoline, are within range of the branch.  For this reason, the
15866f685c5cSDave Martin	  kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
15876f685c5cSDave Martin	  relocation in modules at all, and it makes little sense to add
15886f685c5cSDave Martin	  support.
15896f685c5cSDave Martin
15906f685c5cSDave Martin	  The symptom is that the kernel fails with an "unsupported
15916f685c5cSDave Martin	  relocation" error when loading some modules.
15926f685c5cSDave Martin
15936f685c5cSDave Martin	  Until fixed tools are available, passing
15946f685c5cSDave Martin	  -fno-optimize-sibling-calls to gcc should prevent gcc generating
15956f685c5cSDave Martin	  code which hits this problem, at the cost of a bit of extra runtime
15966f685c5cSDave Martin	  stack usage in some cases.
15976f685c5cSDave Martin
15986f685c5cSDave Martin	  The problem is described in more detail at:
15996f685c5cSDave Martin	      https://bugs.launchpad.net/binutils-linaro/+bug/725126
16006f685c5cSDave Martin
16016f685c5cSDave Martin	  Only Thumb-2 kernels are affected.
16026f685c5cSDave Martin
16036f685c5cSDave Martin	  Unless you are sure your tools don't have this problem, say Y.
16046f685c5cSDave Martin
16050becb088SCatalin Marinasconfig ARM_ASM_UNIFIED
16060becb088SCatalin Marinas	bool
16070becb088SCatalin Marinas
1608704bdda0SNicolas Pitreconfig AEABI
1609704bdda0SNicolas Pitre	bool "Use the ARM EABI to compile the kernel"
1610704bdda0SNicolas Pitre	help
1611704bdda0SNicolas Pitre	  This option allows for the kernel to be compiled using the latest
1612704bdda0SNicolas Pitre	  ARM ABI (aka EABI).  This is only useful if you are using a user
1613704bdda0SNicolas Pitre	  space environment that is also compiled with EABI.
1614704bdda0SNicolas Pitre
1615704bdda0SNicolas Pitre	  Since there are major incompatibilities between the legacy ABI and
1616704bdda0SNicolas Pitre	  EABI, especially with regard to structure member alignment, this
1617704bdda0SNicolas Pitre	  option also changes the kernel syscall calling convention to
1618704bdda0SNicolas Pitre	  disambiguate both ABIs and allow for backward compatibility support
1619704bdda0SNicolas Pitre	  (selected with CONFIG_OABI_COMPAT).
1620704bdda0SNicolas Pitre
1621704bdda0SNicolas Pitre	  To use this you need GCC version 4.0.0 or later.
1622704bdda0SNicolas Pitre
16236c90c872SNicolas Pitreconfig OABI_COMPAT
1624a73a3ff1SRussell King	bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
1625d6f94fa0SKees Cook	depends on AEABI && !THUMB2_KERNEL
16266c90c872SNicolas Pitre	help
16276c90c872SNicolas Pitre	  This option preserves the old syscall interface along with the
16286c90c872SNicolas Pitre	  new (ARM EABI) one. It also provides a compatibility layer to
16296c90c872SNicolas Pitre	  intercept syscalls that have structure arguments which layout
16306c90c872SNicolas Pitre	  in memory differs between the legacy ABI and the new ARM EABI
16316c90c872SNicolas Pitre	  (only for non "thumb" binaries). This option adds a tiny
16326c90c872SNicolas Pitre	  overhead to all syscalls and produces a slightly larger kernel.
163391702175SKees Cook
163491702175SKees Cook	  The seccomp filter system will not be available when this is
163591702175SKees Cook	  selected, since there is no way yet to sensibly distinguish
163691702175SKees Cook	  between calling conventions during filtering.
163791702175SKees Cook
16386c90c872SNicolas Pitre	  If you know you'll be using only pure EABI user space then you
16396c90c872SNicolas Pitre	  can say N here. If this option is not selected and you attempt
16406c90c872SNicolas Pitre	  to execute a legacy ABI binary then the result will be
16416c90c872SNicolas Pitre	  UNPREDICTABLE (in fact it can be predicted that it won't work
1642b02f8467SKees Cook	  at all). If in doubt say N.
16436c90c872SNicolas Pitre
1644eb33575cSMel Gormanconfig ARCH_HAS_HOLES_MEMORYMODEL
1645e80d6a24SMel Gorman	bool
1646e80d6a24SMel Gorman
164705944d74SRussell Kingconfig ARCH_SPARSEMEM_ENABLE
164805944d74SRussell King	bool
164905944d74SRussell King
165007a2f737SRussell Kingconfig ARCH_SPARSEMEM_DEFAULT
165107a2f737SRussell King	def_bool ARCH_SPARSEMEM_ENABLE
165207a2f737SRussell King
165305944d74SRussell Kingconfig ARCH_SELECT_MEMORY_MODEL
1654be370302SRussell King	def_bool ARCH_SPARSEMEM_ENABLE
1655c80d79d7SYasunori Goto
16567b7bf499SWill Deaconconfig HAVE_ARCH_PFN_VALID
16577b7bf499SWill Deacon	def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
16587b7bf499SWill Deacon
1659053a96caSNicolas Pitreconfig HIGHMEM
1660e8db89a2SRussell King	bool "High Memory Support"
1661e8db89a2SRussell King	depends on MMU
1662053a96caSNicolas Pitre	help
1663053a96caSNicolas Pitre	  The address space of ARM processors is only 4 Gigabytes large
1664053a96caSNicolas Pitre	  and it has to accommodate user address space, kernel address
1665053a96caSNicolas Pitre	  space as well as some memory mapped IO. That means that, if you
1666053a96caSNicolas Pitre	  have a large amount of physical memory and/or IO, not all of the
1667053a96caSNicolas Pitre	  memory can be "permanently mapped" by the kernel. The physical
1668053a96caSNicolas Pitre	  memory that is not permanently mapped is called "high memory".
1669053a96caSNicolas Pitre
1670053a96caSNicolas Pitre	  Depending on the selected kernel/user memory split, minimum
1671053a96caSNicolas Pitre	  vmalloc space and actual amount of RAM, you may not need this
1672053a96caSNicolas Pitre	  option which should result in a slightly faster kernel.
1673053a96caSNicolas Pitre
1674053a96caSNicolas Pitre	  If unsure, say n.
1675053a96caSNicolas Pitre
167665cec8e3SRussell Kingconfig HIGHPTE
167765cec8e3SRussell King	bool "Allocate 2nd-level pagetables from highmem"
167865cec8e3SRussell King	depends on HIGHMEM
167965cec8e3SRussell King
16801b8873a0SJamie Ilesconfig HW_PERF_EVENTS
16811b8873a0SJamie Iles	bool "Enable hardware performance counter support for perf events"
1682f0d1bc47SWill Deacon	depends on PERF_EVENTS
16831b8873a0SJamie Iles	default y
16841b8873a0SJamie Iles	help
16851b8873a0SJamie Iles	  Enable hardware performance counter support for perf events. If
16861b8873a0SJamie Iles	  disabled, perf events will use software events only.
16871b8873a0SJamie Iles
16881355e2a6SCatalin Marinasconfig SYS_SUPPORTS_HUGETLBFS
16891355e2a6SCatalin Marinas       def_bool y
16901355e2a6SCatalin Marinas       depends on ARM_LPAE
16911355e2a6SCatalin Marinas
16928d962507SCatalin Marinasconfig HAVE_ARCH_TRANSPARENT_HUGEPAGE
16938d962507SCatalin Marinas       def_bool y
16948d962507SCatalin Marinas       depends on ARM_LPAE
16958d962507SCatalin Marinas
16964bfab203SSteven Capperconfig ARCH_WANT_GENERAL_HUGETLB
16974bfab203SSteven Capper	def_bool y
16984bfab203SSteven Capper
16993f22ab27SDave Hansensource "mm/Kconfig"
17003f22ab27SDave Hansen
1701c1b2d970SMagnus Dammconfig FORCE_MAX_ZONEORDER
1702bf98c1eaSLaurent Pinchart	int "Maximum zone order" if ARCH_SHMOBILE_LEGACY
1703bf98c1eaSLaurent Pinchart	range 11 64 if ARCH_SHMOBILE_LEGACY
1704898f08e1SYegor Yefremov	default "12" if SOC_AM33XX
17056d85e2b0SUwe Kleine-König	default "9" if SA1111 || ARCH_EFM32
1706c1b2d970SMagnus Damm	default "11"
1707c1b2d970SMagnus Damm	help
1708c1b2d970SMagnus Damm	  The kernel memory allocator divides physically contiguous memory
1709c1b2d970SMagnus Damm	  blocks into "zones", where each zone is a power of two number of
1710c1b2d970SMagnus Damm	  pages.  This option selects the largest power of two that the kernel
1711c1b2d970SMagnus Damm	  keeps in the memory allocator.  If you need to allocate very large
1712c1b2d970SMagnus Damm	  blocks of physically contiguous memory, then you may need to
1713c1b2d970SMagnus Damm	  increase this value.
1714c1b2d970SMagnus Damm
1715c1b2d970SMagnus Damm	  This config option is actually maximum order plus one. For example,
1716c1b2d970SMagnus Damm	  a value of 11 means that the largest free memory block is 2^10 pages.
1717c1b2d970SMagnus Damm
17181da177e4SLinus Torvaldsconfig ALIGNMENT_TRAP
17191da177e4SLinus Torvalds	bool
1720f12d0d7cSHyok S. Choi	depends on CPU_CP15_MMU
17211da177e4SLinus Torvalds	default y if !ARCH_EBSA110
1722e119bfffSRussell King	select HAVE_PROC_CPU if PROC_FS
17231da177e4SLinus Torvalds	help
17241da177e4SLinus Torvalds	  ARM processors cannot fetch/store information which is not
17251da177e4SLinus Torvalds	  naturally aligned on the bus, i.e., a 4 byte fetch must start at an
17261da177e4SLinus Torvalds	  address divisible by 4. On 32-bit ARM processors, these non-aligned
17271da177e4SLinus Torvalds	  fetch/store instructions will be emulated in software if you say
17281da177e4SLinus Torvalds	  here, which has a severe performance impact. This is necessary for
17291da177e4SLinus Torvalds	  correct operation of some network protocols. With an IP-only
17301da177e4SLinus Torvalds	  configuration it is safe to say N, otherwise say Y.
17311da177e4SLinus Torvalds
173239ec58f3SLennert Buytenhekconfig UACCESS_WITH_MEMCPY
173338ef2ad5SLinus Walleij	bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user()"
173438ef2ad5SLinus Walleij	depends on MMU
173539ec58f3SLennert Buytenhek	default y if CPU_FEROCEON
173639ec58f3SLennert Buytenhek	help
173739ec58f3SLennert Buytenhek	  Implement faster copy_to_user and clear_user methods for CPU
173839ec58f3SLennert Buytenhek	  cores where a 8-word STM instruction give significantly higher
173939ec58f3SLennert Buytenhek	  memory write throughput than a sequence of individual 32bit stores.
174039ec58f3SLennert Buytenhek
174139ec58f3SLennert Buytenhek	  A possible side effect is a slight increase in scheduling latency
174239ec58f3SLennert Buytenhek	  between threads sharing the same address space if they invoke
174339ec58f3SLennert Buytenhek	  such copy operations with large buffers.
174439ec58f3SLennert Buytenhek
174539ec58f3SLennert Buytenhek	  However, if the CPU data cache is using a write-allocate mode,
174639ec58f3SLennert Buytenhek	  this option is unlikely to provide any performance gain.
174739ec58f3SLennert Buytenhek
174870c70d97SNicolas Pitreconfig SECCOMP
174970c70d97SNicolas Pitre	bool
175070c70d97SNicolas Pitre	prompt "Enable seccomp to safely compute untrusted bytecode"
175170c70d97SNicolas Pitre	---help---
175270c70d97SNicolas Pitre	  This kernel feature is useful for number crunching applications
175370c70d97SNicolas Pitre	  that may need to compute untrusted bytecode during their
175470c70d97SNicolas Pitre	  execution. By using pipes or other transports made available to
175570c70d97SNicolas Pitre	  the process as file descriptors supporting the read/write
175670c70d97SNicolas Pitre	  syscalls, it's possible to isolate those applications in
175770c70d97SNicolas Pitre	  their own address space using seccomp. Once seccomp is
175870c70d97SNicolas Pitre	  enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
175970c70d97SNicolas Pitre	  and the task is only allowed to execute a few safe syscalls
176070c70d97SNicolas Pitre	  defined by each seccomp mode.
176170c70d97SNicolas Pitre
176206e6295bSStefano Stabelliniconfig SWIOTLB
176306e6295bSStefano Stabellini	def_bool y
176406e6295bSStefano Stabellini
176506e6295bSStefano Stabelliniconfig IOMMU_HELPER
176606e6295bSStefano Stabellini	def_bool SWIOTLB
176706e6295bSStefano Stabellini
1768eff8d644SStefano Stabelliniconfig XEN_DOM0
1769eff8d644SStefano Stabellini	def_bool y
1770eff8d644SStefano Stabellini	depends on XEN
1771eff8d644SStefano Stabellini
1772eff8d644SStefano Stabelliniconfig XEN
1773eff8d644SStefano Stabellini	bool "Xen guest support on ARM (EXPERIMENTAL)"
177485323a99SIan Campbell	depends on ARM && AEABI && OF
1775f880b67dSArnd Bergmann	depends on CPU_V7 && !CPU_V6
177685323a99SIan Campbell	depends on !GENERIC_ATOMIC64
17777693deccSUwe Kleine-König	depends on MMU
177851aaf81fSRussell King	select ARCH_DMA_ADDR_T_64BIT
177917b7ab80SStefano Stabellini	select ARM_PSCI
178083862ccfSStefano Stabellini	select SWIOTLB_XEN
1781eff8d644SStefano Stabellini	help
1782eff8d644SStefano Stabellini	  Say Y if you want to run Linux in a Virtual Machine on Xen on ARM.
1783eff8d644SStefano Stabellini
17841da177e4SLinus Torvaldsendmenu
17851da177e4SLinus Torvalds
17861da177e4SLinus Torvaldsmenu "Boot options"
17871da177e4SLinus Torvalds
17889eb8f674SGrant Likelyconfig USE_OF
17899eb8f674SGrant Likely	bool "Flattened Device Tree support"
1790b1b3f49cSRussell King	select IRQ_DOMAIN
17919eb8f674SGrant Likely	select OF
17929eb8f674SGrant Likely	select OF_EARLY_FLATTREE
1793bcedb5f9SMarek Szyprowski	select OF_RESERVED_MEM
17949eb8f674SGrant Likely	help
17959eb8f674SGrant Likely	  Include support for flattened device tree machine descriptions.
17969eb8f674SGrant Likely
1797bd51e2f5SNicolas Pitreconfig ATAGS
1798bd51e2f5SNicolas Pitre	bool "Support for the traditional ATAGS boot data passing" if USE_OF
1799bd51e2f5SNicolas Pitre	default y
1800bd51e2f5SNicolas Pitre	help
1801bd51e2f5SNicolas Pitre	  This is the traditional way of passing data to the kernel at boot
1802bd51e2f5SNicolas Pitre	  time. If you are solely relying on the flattened device tree (or
1803bd51e2f5SNicolas Pitre	  the ARM_ATAG_DTB_COMPAT option) then you may unselect this option
1804bd51e2f5SNicolas Pitre	  to remove ATAGS support from your kernel binary.  If unsure,
1805bd51e2f5SNicolas Pitre	  leave this to y.
1806bd51e2f5SNicolas Pitre
1807bd51e2f5SNicolas Pitreconfig DEPRECATED_PARAM_STRUCT
1808bd51e2f5SNicolas Pitre	bool "Provide old way to pass kernel parameters"
1809bd51e2f5SNicolas Pitre	depends on ATAGS
1810bd51e2f5SNicolas Pitre	help
1811bd51e2f5SNicolas Pitre	  This was deprecated in 2001 and announced to live on for 5 years.
1812bd51e2f5SNicolas Pitre	  Some old boot loaders still use this way.
1813bd51e2f5SNicolas Pitre
18141da177e4SLinus Torvalds# Compressed boot loader in ROM.  Yes, we really want to ask about
18151da177e4SLinus Torvalds# TEXT and BSS so we preserve their values in the config files.
18161da177e4SLinus Torvaldsconfig ZBOOT_ROM_TEXT
18171da177e4SLinus Torvalds	hex "Compressed ROM boot loader base address"
18181da177e4SLinus Torvalds	default "0"
18191da177e4SLinus Torvalds	help
18201da177e4SLinus Torvalds	  The physical address at which the ROM-able zImage is to be
18211da177e4SLinus Torvalds	  placed in the target.  Platforms which normally make use of
18221da177e4SLinus Torvalds	  ROM-able zImage formats normally set this to a suitable
18231da177e4SLinus Torvalds	  value in their defconfig file.
18241da177e4SLinus Torvalds
18251da177e4SLinus Torvalds	  If ZBOOT_ROM is not enabled, this has no effect.
18261da177e4SLinus Torvalds
18271da177e4SLinus Torvaldsconfig ZBOOT_ROM_BSS
18281da177e4SLinus Torvalds	hex "Compressed ROM boot loader BSS address"
18291da177e4SLinus Torvalds	default "0"
18301da177e4SLinus Torvalds	help
1831f8c440b2SDan Fandrich	  The base address of an area of read/write memory in the target
1832f8c440b2SDan Fandrich	  for the ROM-able zImage which must be available while the
1833f8c440b2SDan Fandrich	  decompressor is running. It must be large enough to hold the
1834f8c440b2SDan Fandrich	  entire decompressed kernel plus an additional 128 KiB.
1835f8c440b2SDan Fandrich	  Platforms which normally make use of ROM-able zImage formats
1836f8c440b2SDan Fandrich	  normally set this to a suitable value in their defconfig file.
18371da177e4SLinus Torvalds
18381da177e4SLinus Torvalds	  If ZBOOT_ROM is not enabled, this has no effect.
18391da177e4SLinus Torvalds
18401da177e4SLinus Torvaldsconfig ZBOOT_ROM
18411da177e4SLinus Torvalds	bool "Compressed boot loader in ROM/flash"
18421da177e4SLinus Torvalds	depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
184310968131SRussell King	depends on !ARM_APPENDED_DTB && !XIP_KERNEL && !AUTO_ZRELADDR
18441da177e4SLinus Torvalds	help
18451da177e4SLinus Torvalds	  Say Y here if you intend to execute your compressed kernel image
18461da177e4SLinus Torvalds	  (zImage) directly from ROM or flash.  If unsure, say N.
18471da177e4SLinus Torvalds
1848090ab3ffSSimon Hormanchoice
1849090ab3ffSSimon Horman	prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)"
1850d6f94fa0SKees Cook	depends on ZBOOT_ROM && ARCH_SH7372
1851090ab3ffSSimon Horman	default ZBOOT_ROM_NONE
1852090ab3ffSSimon Horman	help
1853090ab3ffSSimon Horman	  Include experimental SD/MMC loading code in the ROM-able zImage.
185459bf8964SMasanari Iida	  With this enabled it is possible to write the ROM-able zImage
1855090ab3ffSSimon Horman	  kernel image to an MMC or SD card and boot the kernel straight
1856090ab3ffSSimon Horman	  from the reset vector. At reset the processor Mask ROM will load
185759bf8964SMasanari Iida	  the first part of the ROM-able zImage which in turn loads the
1858090ab3ffSSimon Horman	  rest the kernel image to RAM.
1859090ab3ffSSimon Horman
1860090ab3ffSSimon Hormanconfig ZBOOT_ROM_NONE
1861090ab3ffSSimon Horman	bool "No SD/MMC loader in zImage (EXPERIMENTAL)"
1862090ab3ffSSimon Horman	help
1863090ab3ffSSimon Horman	  Do not load image from SD or MMC
1864090ab3ffSSimon Horman
1865f45b1149SSimon Hormanconfig ZBOOT_ROM_MMCIF
1866f45b1149SSimon Horman	bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
1867f45b1149SSimon Horman	help
1868090ab3ffSSimon Horman	  Load image from MMCIF hardware block.
1869090ab3ffSSimon Horman
1870090ab3ffSSimon Hormanconfig ZBOOT_ROM_SH_MOBILE_SDHI
1871090ab3ffSSimon Horman	bool "Include SuperH Mobile SDHI loader in zImage (EXPERIMENTAL)"
1872090ab3ffSSimon Horman	help
1873090ab3ffSSimon Horman	  Load image from SDHI hardware block
1874090ab3ffSSimon Horman
1875090ab3ffSSimon Hormanendchoice
1876f45b1149SSimon Horman
1877e2a6a3aaSJohn Bonesioconfig ARM_APPENDED_DTB
1878e2a6a3aaSJohn Bonesio	bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
187910968131SRussell King	depends on OF
1880e2a6a3aaSJohn Bonesio	help
1881e2a6a3aaSJohn Bonesio	  With this option, the boot code will look for a device tree binary
1882e2a6a3aaSJohn Bonesio	  (DTB) appended to zImage
1883e2a6a3aaSJohn Bonesio	  (e.g. cat zImage <filename>.dtb > zImage_w_dtb).
1884e2a6a3aaSJohn Bonesio
1885e2a6a3aaSJohn Bonesio	  This is meant as a backward compatibility convenience for those
1886e2a6a3aaSJohn Bonesio	  systems with a bootloader that can't be upgraded to accommodate
1887e2a6a3aaSJohn Bonesio	  the documented boot protocol using a device tree.
1888e2a6a3aaSJohn Bonesio
1889e2a6a3aaSJohn Bonesio	  Beware that there is very little in terms of protection against
1890e2a6a3aaSJohn Bonesio	  this option being confused by leftover garbage in memory that might
1891e2a6a3aaSJohn Bonesio	  look like a DTB header after a reboot if no actual DTB is appended
1892e2a6a3aaSJohn Bonesio	  to zImage.  Do not leave this option active in a production kernel
1893e2a6a3aaSJohn Bonesio	  if you don't intend to always append a DTB.  Proper passing of the
1894e2a6a3aaSJohn Bonesio	  location into r2 of a bootloader provided DTB is always preferable
1895e2a6a3aaSJohn Bonesio	  to this option.
1896e2a6a3aaSJohn Bonesio
1897b90b9a38SNicolas Pitreconfig ARM_ATAG_DTB_COMPAT
1898b90b9a38SNicolas Pitre	bool "Supplement the appended DTB with traditional ATAG information"
1899b90b9a38SNicolas Pitre	depends on ARM_APPENDED_DTB
1900b90b9a38SNicolas Pitre	help
1901b90b9a38SNicolas Pitre	  Some old bootloaders can't be updated to a DTB capable one, yet
1902b90b9a38SNicolas Pitre	  they provide ATAGs with memory configuration, the ramdisk address,
1903b90b9a38SNicolas Pitre	  the kernel cmdline string, etc.  Such information is dynamically
1904b90b9a38SNicolas Pitre	  provided by the bootloader and can't always be stored in a static
1905b90b9a38SNicolas Pitre	  DTB.  To allow a device tree enabled kernel to be used with such
1906b90b9a38SNicolas Pitre	  bootloaders, this option allows zImage to extract the information
1907b90b9a38SNicolas Pitre	  from the ATAG list and store it at run time into the appended DTB.
1908b90b9a38SNicolas Pitre
1909d0f34a11SGenoud Richardchoice
1910d0f34a11SGenoud Richard	prompt "Kernel command line type" if ARM_ATAG_DTB_COMPAT
1911d0f34a11SGenoud Richard	default ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
1912d0f34a11SGenoud Richard
1913d0f34a11SGenoud Richardconfig ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
1914d0f34a11SGenoud Richard	bool "Use bootloader kernel arguments if available"
1915d0f34a11SGenoud Richard	help
1916d0f34a11SGenoud Richard	  Uses the command-line options passed by the boot loader instead of
1917d0f34a11SGenoud Richard	  the device tree bootargs property. If the boot loader doesn't provide
1918d0f34a11SGenoud Richard	  any, the device tree bootargs property will be used.
1919d0f34a11SGenoud Richard
1920d0f34a11SGenoud Richardconfig ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEND
1921d0f34a11SGenoud Richard	bool "Extend with bootloader kernel arguments"
1922d0f34a11SGenoud Richard	help
1923d0f34a11SGenoud Richard	  The command-line arguments provided by the boot loader will be
1924d0f34a11SGenoud Richard	  appended to the the device tree bootargs property.
1925d0f34a11SGenoud Richard
1926d0f34a11SGenoud Richardendchoice
1927d0f34a11SGenoud Richard
19281da177e4SLinus Torvaldsconfig CMDLINE
19291da177e4SLinus Torvalds	string "Default kernel command string"
19301da177e4SLinus Torvalds	default ""
19311da177e4SLinus Torvalds	help
19321da177e4SLinus Torvalds	  On some architectures (EBSA110 and CATS), there is currently no way
19331da177e4SLinus Torvalds	  for the boot loader to pass arguments to the kernel. For these
19341da177e4SLinus Torvalds	  architectures, you should supply some command-line options at build
19351da177e4SLinus Torvalds	  time by entering them here. As a minimum, you should specify the
19361da177e4SLinus Torvalds	  memory size and the root device (e.g., mem=64M root=/dev/nfs).
19371da177e4SLinus Torvalds
19384394c124SVictor Boiviechoice
19394394c124SVictor Boivie	prompt "Kernel command line type" if CMDLINE != ""
19404394c124SVictor Boivie	default CMDLINE_FROM_BOOTLOADER
1941bd51e2f5SNicolas Pitre	depends on ATAGS
19424394c124SVictor Boivie
19434394c124SVictor Boivieconfig CMDLINE_FROM_BOOTLOADER
19444394c124SVictor Boivie	bool "Use bootloader kernel arguments if available"
19454394c124SVictor Boivie	help
19464394c124SVictor Boivie	  Uses the command-line options passed by the boot loader. If
19474394c124SVictor Boivie	  the boot loader doesn't provide any, the default kernel command
19484394c124SVictor Boivie	  string provided in CMDLINE will be used.
19494394c124SVictor Boivie
19504394c124SVictor Boivieconfig CMDLINE_EXTEND
19514394c124SVictor Boivie	bool "Extend bootloader kernel arguments"
19524394c124SVictor Boivie	help
19534394c124SVictor Boivie	  The command-line arguments provided by the boot loader will be
19544394c124SVictor Boivie	  appended to the default kernel command string.
19554394c124SVictor Boivie
195692d2040dSAlexander Hollerconfig CMDLINE_FORCE
195792d2040dSAlexander Holler	bool "Always use the default kernel command string"
195892d2040dSAlexander Holler	help
195992d2040dSAlexander Holler	  Always use the default kernel command string, even if the boot
196092d2040dSAlexander Holler	  loader passes other arguments to the kernel.
196192d2040dSAlexander Holler	  This is useful if you cannot or don't want to change the
196292d2040dSAlexander Holler	  command-line options your boot loader passes to the kernel.
19634394c124SVictor Boivieendchoice
196492d2040dSAlexander Holler
19651da177e4SLinus Torvaldsconfig XIP_KERNEL
19661da177e4SLinus Torvalds	bool "Kernel Execute-In-Place from ROM"
196710968131SRussell King	depends on !ARM_LPAE && !ARCH_MULTIPLATFORM
19681da177e4SLinus Torvalds	help
19691da177e4SLinus Torvalds	  Execute-In-Place allows the kernel to run from non-volatile storage
19701da177e4SLinus Torvalds	  directly addressable by the CPU, such as NOR flash. This saves RAM
19711da177e4SLinus Torvalds	  space since the text section of the kernel is not loaded from flash
19721da177e4SLinus Torvalds	  to RAM.  Read-write sections, such as the data section and stack,
19731da177e4SLinus Torvalds	  are still copied to RAM.  The XIP kernel is not compressed since
19741da177e4SLinus Torvalds	  it has to run directly from flash, so it will take more space to
19751da177e4SLinus Torvalds	  store it.  The flash address used to link the kernel object files,
19761da177e4SLinus Torvalds	  and for storing it, is configuration dependent. Therefore, if you
19771da177e4SLinus Torvalds	  say Y here, you must know the proper physical address where to
19781da177e4SLinus Torvalds	  store the kernel image depending on your own flash memory usage.
19791da177e4SLinus Torvalds
19801da177e4SLinus Torvalds	  Also note that the make target becomes "make xipImage" rather than
19811da177e4SLinus Torvalds	  "make zImage" or "make Image".  The final kernel binary to put in
19821da177e4SLinus Torvalds	  ROM memory will be arch/arm/boot/xipImage.
19831da177e4SLinus Torvalds
19841da177e4SLinus Torvalds	  If unsure, say N.
19851da177e4SLinus Torvalds
19861da177e4SLinus Torvaldsconfig XIP_PHYS_ADDR
19871da177e4SLinus Torvalds	hex "XIP Kernel Physical Location"
19881da177e4SLinus Torvalds	depends on XIP_KERNEL
19891da177e4SLinus Torvalds	default "0x00080000"
19901da177e4SLinus Torvalds	help
19911da177e4SLinus Torvalds	  This is the physical address in your flash memory the kernel will
19921da177e4SLinus Torvalds	  be linked for and stored to.  This address is dependent on your
19931da177e4SLinus Torvalds	  own flash usage.
19941da177e4SLinus Torvalds
1995c587e4a6SRichard Purdieconfig KEXEC
1996c587e4a6SRichard Purdie	bool "Kexec system call (EXPERIMENTAL)"
199719ab428fSStephen Warren	depends on (!SMP || PM_SLEEP_SMP)
1998c587e4a6SRichard Purdie	help
1999c587e4a6SRichard Purdie	  kexec is a system call that implements the ability to shutdown your
2000c587e4a6SRichard Purdie	  current kernel, and to start another kernel.  It is like a reboot
200101dd2fbfSMatt LaPlante	  but it is independent of the system firmware.   And like a reboot
2002c587e4a6SRichard Purdie	  you can start any kernel with it, not just Linux.
2003c587e4a6SRichard Purdie
2004c587e4a6SRichard Purdie	  It is an ongoing process to be certain the hardware in a machine
2005c587e4a6SRichard Purdie	  is properly shutdown, so do not be surprised if this code does not
2006bf220695SGeert Uytterhoeven	  initially work for you.
2007c587e4a6SRichard Purdie
20084cd9d6f7SRichard Purdieconfig ATAGS_PROC
20094cd9d6f7SRichard Purdie	bool "Export atags in procfs"
2010bd51e2f5SNicolas Pitre	depends on ATAGS && KEXEC
2011b98d7291SUli Luckas	default y
20124cd9d6f7SRichard Purdie	help
20134cd9d6f7SRichard Purdie	  Should the atags used to boot the kernel be exported in an "atags"
20144cd9d6f7SRichard Purdie	  file in procfs. Useful with kexec.
20154cd9d6f7SRichard Purdie
2016cb5d39b3SMika Westerbergconfig CRASH_DUMP
2017cb5d39b3SMika Westerberg	bool "Build kdump crash kernel (EXPERIMENTAL)"
2018cb5d39b3SMika Westerberg	help
2019cb5d39b3SMika Westerberg	  Generate crash dump after being started by kexec. This should
2020cb5d39b3SMika Westerberg	  be normally only set in special crash dump kernels which are
2021cb5d39b3SMika Westerberg	  loaded in the main kernel with kexec-tools into a specially
2022cb5d39b3SMika Westerberg	  reserved region and then later executed after a crash by
2023cb5d39b3SMika Westerberg	  kdump/kexec. The crash dump kernel must be compiled to a
2024cb5d39b3SMika Westerberg	  memory address not used by the main kernel
2025cb5d39b3SMika Westerberg
2026cb5d39b3SMika Westerberg	  For more details see Documentation/kdump/kdump.txt
2027cb5d39b3SMika Westerberg
2028e69edc79SEric Miaoconfig AUTO_ZRELADDR
2029e69edc79SEric Miao	bool "Auto calculation of the decompressed kernel image address"
2030e69edc79SEric Miao	help
2031e69edc79SEric Miao	  ZRELADDR is the physical address where the decompressed kernel
2032e69edc79SEric Miao	  image will be placed. If AUTO_ZRELADDR is selected, the address
2033e69edc79SEric Miao	  will be determined at run-time by masking the current IP with
2034e69edc79SEric Miao	  0xf8000000. This assumes the zImage being placed in the first 128MB
2035e69edc79SEric Miao	  from start of memory.
2036e69edc79SEric Miao
20371da177e4SLinus Torvaldsendmenu
20381da177e4SLinus Torvalds
2039ac9d7efcSRussell Kingmenu "CPU Power Management"
20401da177e4SLinus Torvalds
20411da177e4SLinus Torvaldssource "drivers/cpufreq/Kconfig"
20421da177e4SLinus Torvalds
2043ac9d7efcSRussell Kingsource "drivers/cpuidle/Kconfig"
2044ac9d7efcSRussell King
2045ac9d7efcSRussell Kingendmenu
2046ac9d7efcSRussell King
20471da177e4SLinus Torvaldsmenu "Floating point emulation"
20481da177e4SLinus Torvalds
20491da177e4SLinus Torvaldscomment "At least one emulation must be selected"
20501da177e4SLinus Torvalds
20511da177e4SLinus Torvaldsconfig FPE_NWFPE
20521da177e4SLinus Torvalds	bool "NWFPE math emulation"
2053593c252aSDave Martin	depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
20541da177e4SLinus Torvalds	---help---
20551da177e4SLinus Torvalds	  Say Y to include the NWFPE floating point emulator in the kernel.
20561da177e4SLinus Torvalds	  This is necessary to run most binaries. Linux does not currently
20571da177e4SLinus Torvalds	  support floating point hardware so you need to say Y here even if
20581da177e4SLinus Torvalds	  your machine has an FPA or floating point co-processor podule.
20591da177e4SLinus Torvalds
20601da177e4SLinus Torvalds	  You may say N here if you are going to load the Acorn FPEmulator
20611da177e4SLinus Torvalds	  early in the bootup.
20621da177e4SLinus Torvalds
20631da177e4SLinus Torvaldsconfig FPE_NWFPE_XP
20641da177e4SLinus Torvalds	bool "Support extended precision"
2065bedf142bSLennert Buytenhek	depends on FPE_NWFPE
20661da177e4SLinus Torvalds	help
20671da177e4SLinus Torvalds	  Say Y to include 80-bit support in the kernel floating-point
20681da177e4SLinus Torvalds	  emulator.  Otherwise, only 32 and 64-bit support is compiled in.
20691da177e4SLinus Torvalds	  Note that gcc does not generate 80-bit operations by default,
20701da177e4SLinus Torvalds	  so in most cases this option only enlarges the size of the
20711da177e4SLinus Torvalds	  floating point emulator without any good reason.
20721da177e4SLinus Torvalds
20731da177e4SLinus Torvalds	  You almost surely want to say N here.
20741da177e4SLinus Torvalds
20751da177e4SLinus Torvaldsconfig FPE_FASTFPE
20761da177e4SLinus Torvalds	bool "FastFPE math emulation (EXPERIMENTAL)"
2077d6f94fa0SKees Cook	depends on (!AEABI || OABI_COMPAT) && !CPU_32v3
20781da177e4SLinus Torvalds	---help---
20791da177e4SLinus Torvalds	  Say Y here to include the FAST floating point emulator in the kernel.
20801da177e4SLinus Torvalds	  This is an experimental much faster emulator which now also has full
20811da177e4SLinus Torvalds	  precision for the mantissa.  It does not support any exceptions.
20821da177e4SLinus Torvalds	  It is very simple, and approximately 3-6 times faster than NWFPE.
20831da177e4SLinus Torvalds
20841da177e4SLinus Torvalds	  It should be sufficient for most programs.  It may be not suitable
20851da177e4SLinus Torvalds	  for scientific calculations, but you have to check this for yourself.
20861da177e4SLinus Torvalds	  If you do not feel you need a faster FP emulation you should better
20871da177e4SLinus Torvalds	  choose NWFPE.
20881da177e4SLinus Torvalds
20891da177e4SLinus Torvaldsconfig VFP
20901da177e4SLinus Torvalds	bool "VFP-format floating point maths"
2091e399b1a4SRussell King	depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
20921da177e4SLinus Torvalds	help
20931da177e4SLinus Torvalds	  Say Y to include VFP support code in the kernel. This is needed
20941da177e4SLinus Torvalds	  if your hardware includes a VFP unit.
20951da177e4SLinus Torvalds
20961da177e4SLinus Torvalds	  Please see <file:Documentation/arm/VFP/release-notes.txt> for
20971da177e4SLinus Torvalds	  release notes and additional status information.
20981da177e4SLinus Torvalds
20991da177e4SLinus Torvalds	  Say N if your target does not have VFP hardware.
21001da177e4SLinus Torvalds
210125ebee02SCatalin Marinasconfig VFPv3
210225ebee02SCatalin Marinas	bool
210325ebee02SCatalin Marinas	depends on VFP
210425ebee02SCatalin Marinas	default y if CPU_V7
210525ebee02SCatalin Marinas
2106b5872db4SCatalin Marinasconfig NEON
2107b5872db4SCatalin Marinas	bool "Advanced SIMD (NEON) Extension support"
2108b5872db4SCatalin Marinas	depends on VFPv3 && CPU_V7
2109b5872db4SCatalin Marinas	help
2110b5872db4SCatalin Marinas	  Say Y to include support code for NEON, the ARMv7 Advanced SIMD
2111b5872db4SCatalin Marinas	  Extension.
2112b5872db4SCatalin Marinas
211373c132c1SArd Biesheuvelconfig KERNEL_MODE_NEON
211473c132c1SArd Biesheuvel	bool "Support for NEON in kernel mode"
2115c4a30c3bSRussell King	depends on NEON && AEABI
211673c132c1SArd Biesheuvel	help
211773c132c1SArd Biesheuvel	  Say Y to include support for NEON in kernel mode.
211873c132c1SArd Biesheuvel
21191da177e4SLinus Torvaldsendmenu
21201da177e4SLinus Torvalds
21211da177e4SLinus Torvaldsmenu "Userspace binary formats"
21221da177e4SLinus Torvalds
21231da177e4SLinus Torvaldssource "fs/Kconfig.binfmt"
21241da177e4SLinus Torvalds
21251da177e4SLinus Torvaldsconfig ARTHUR
21261da177e4SLinus Torvalds	tristate "RISC OS personality"
2127704bdda0SNicolas Pitre	depends on !AEABI
21281da177e4SLinus Torvalds	help
21291da177e4SLinus Torvalds	  Say Y here to include the kernel code necessary if you want to run
21301da177e4SLinus Torvalds	  Acorn RISC OS/Arthur binaries under Linux. This code is still very
21311da177e4SLinus Torvalds	  experimental; if this sounds frightening, say N and sleep in peace.
21321da177e4SLinus Torvalds	  You can also say M here to compile this support as a module (which
21331da177e4SLinus Torvalds	  will be called arthur).
21341da177e4SLinus Torvalds
21351da177e4SLinus Torvaldsendmenu
21361da177e4SLinus Torvalds
21371da177e4SLinus Torvaldsmenu "Power management options"
21381da177e4SLinus Torvalds
2139eceab4acSRussell Kingsource "kernel/power/Kconfig"
21401da177e4SLinus Torvalds
2141f4cb5700SJohannes Bergconfig ARCH_SUSPEND_POSSIBLE
214219a0519dSEzequiel Garcia	depends on CPU_ARM920T || CPU_ARM926T || CPU_FEROCEON || CPU_SA1100 || \
2143f0d75153SUwe Kleine-König		CPU_V6 || CPU_V6K || CPU_V7 || CPU_V7M || CPU_XSC3 || CPU_XSCALE || CPU_MOHAWK
2144f4cb5700SJohannes Berg	def_bool y
2145f4cb5700SJohannes Berg
214615e0d9e3SArnd Bergmannconfig ARM_CPU_SUSPEND
214715e0d9e3SArnd Bergmann	def_bool PM_SLEEP
214815e0d9e3SArnd Bergmann
2149603fb42aSSebastian Capellaconfig ARCH_HIBERNATION_POSSIBLE
2150603fb42aSSebastian Capella	bool
2151603fb42aSSebastian Capella	depends on MMU
2152603fb42aSSebastian Capella	default y if ARCH_SUSPEND_POSSIBLE
2153603fb42aSSebastian Capella
21541da177e4SLinus Torvaldsendmenu
21551da177e4SLinus Torvalds
2156d5950b43SSam Ravnborgsource "net/Kconfig"
2157d5950b43SSam Ravnborg
2158ac25150fSUwe Kleine-Königsource "drivers/Kconfig"
21591da177e4SLinus Torvalds
21601da177e4SLinus Torvaldssource "fs/Kconfig"
21611da177e4SLinus Torvalds
21621da177e4SLinus Torvaldssource "arch/arm/Kconfig.debug"
21631da177e4SLinus Torvalds
21641da177e4SLinus Torvaldssource "security/Kconfig"
21651da177e4SLinus Torvalds
21661da177e4SLinus Torvaldssource "crypto/Kconfig"
21671da177e4SLinus Torvalds
21681da177e4SLinus Torvaldssource "lib/Kconfig"
2169749cf76cSChristoffer Dall
2170749cf76cSChristoffer Dallsource "arch/arm/kvm/Kconfig"
2171