xref: /linux/arch/arm/Kconfig (revision 43dad399a107ecffdba97454ca4cdf8c7271b228)
1config ARM
2	bool
3	default y
4	select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
5	select ARCH_HAS_ELF_RANDOMIZE
6	select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
7	select ARCH_HAVE_CUSTOM_GPIO_H
8	select ARCH_HAS_GCOV_PROFILE_ALL
9	select ARCH_MIGHT_HAVE_PC_PARPORT
10	select ARCH_SUPPORTS_ATOMIC_RMW
11	select ARCH_USE_BUILTIN_BSWAP
12	select ARCH_USE_CMPXCHG_LOCKREF
13	select ARCH_WANT_IPC_PARSE_VERSION
14	select BUILDTIME_EXTABLE_SORT if MMU
15	select CLONE_BACKWARDS
16	select CPU_PM if (SUSPEND || CPU_IDLE)
17	select DCACHE_WORD_ACCESS if HAVE_EFFICIENT_UNALIGNED_ACCESS
18	select EDAC_SUPPORT
19	select EDAC_ATOMIC_SCRUB
20	select GENERIC_ALLOCATOR
21	select GENERIC_ATOMIC64 if (CPU_V7M || CPU_V6 || !CPU_32v6K || !AEABI)
22	select GENERIC_CLOCKEVENTS_BROADCAST if SMP
23	select GENERIC_IDLE_POLL_SETUP
24	select GENERIC_IRQ_PROBE
25	select GENERIC_IRQ_SHOW
26	select GENERIC_IRQ_SHOW_LEVEL
27	select GENERIC_PCI_IOMAP
28	select GENERIC_SCHED_CLOCK
29	select GENERIC_SMP_IDLE_THREAD
30	select GENERIC_STRNCPY_FROM_USER
31	select GENERIC_STRNLEN_USER
32	select HANDLE_DOMAIN_IRQ
33	select HARDIRQS_SW_RESEND
34	select HAVE_ARCH_AUDITSYSCALL if (AEABI && !OABI_COMPAT)
35	select HAVE_ARCH_BITREVERSE if (CPU_32v7M || CPU_32v7) && !CPU_32v6
36	select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL && !CPU_ENDIAN_BE32
37	select HAVE_ARCH_KGDB if !CPU_ENDIAN_BE32
38	select HAVE_ARCH_SECCOMP_FILTER if (AEABI && !OABI_COMPAT)
39	select HAVE_ARCH_TRACEHOOK
40	select HAVE_BPF_JIT
41	select HAVE_CC_STACKPROTECTOR
42	select HAVE_CONTEXT_TRACKING
43	select HAVE_C_RECORDMCOUNT
44	select HAVE_DEBUG_KMEMLEAK
45	select HAVE_DMA_API_DEBUG
46	select HAVE_DMA_ATTRS
47	select HAVE_DMA_CONTIGUOUS if MMU
48	select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL) && !CPU_ENDIAN_BE32
49	select HAVE_EFFICIENT_UNALIGNED_ACCESS if (CPU_V6 || CPU_V6K || CPU_V7) && MMU
50	select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
51	select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL)
52	select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
53	select HAVE_GENERIC_DMA_COHERENT
54	select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7))
55	select HAVE_IDE if PCI || ISA || PCMCIA
56	select HAVE_IRQ_TIME_ACCOUNTING
57	select HAVE_KERNEL_GZIP
58	select HAVE_KERNEL_LZ4
59	select HAVE_KERNEL_LZMA
60	select HAVE_KERNEL_LZO
61	select HAVE_KERNEL_XZ
62	select HAVE_KPROBES if !XIP_KERNEL && !CPU_ENDIAN_BE32 && !CPU_V7M
63	select HAVE_KRETPROBES if (HAVE_KPROBES)
64	select HAVE_MEMBLOCK
65	select HAVE_MOD_ARCH_SPECIFIC
66	select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
67	select HAVE_OPTPROBES if !THUMB2_KERNEL
68	select HAVE_PERF_EVENTS
69	select HAVE_PERF_REGS
70	select HAVE_PERF_USER_STACK_DUMP
71	select HAVE_RCU_TABLE_FREE if (SMP && ARM_LPAE)
72	select HAVE_REGS_AND_STACK_ACCESS_API
73	select HAVE_SYSCALL_TRACEPOINTS
74	select HAVE_UID16
75	select HAVE_VIRT_CPU_ACCOUNTING_GEN
76	select IRQ_FORCED_THREADING
77	select MODULES_USE_ELF_REL
78	select NO_BOOTMEM
79	select OLD_SIGACTION
80	select OLD_SIGSUSPEND3
81	select PERF_USE_VMALLOC
82	select RTC_LIB
83	select SYS_SUPPORTS_APM_EMULATION
84	# Above selects are sorted alphabetically; please add new ones
85	# according to that.  Thanks.
86	help
87	  The ARM series is a line of low-power-consumption RISC chip designs
88	  licensed by ARM Ltd and targeted at embedded applications and
89	  handhelds such as the Compaq IPAQ.  ARM-based PCs are no longer
90	  manufactured, but legacy ARM-based PC hardware remains popular in
91	  Europe.  There is an ARM Linux project with a web page at
92	  <http://www.arm.linux.org.uk/>.
93
94config ARM_HAS_SG_CHAIN
95	select ARCH_HAS_SG_CHAIN
96	bool
97
98config NEED_SG_DMA_LENGTH
99	bool
100
101config ARM_DMA_USE_IOMMU
102	bool
103	select ARM_HAS_SG_CHAIN
104	select NEED_SG_DMA_LENGTH
105
106if ARM_DMA_USE_IOMMU
107
108config ARM_DMA_IOMMU_ALIGNMENT
109	int "Maximum PAGE_SIZE order of alignment for DMA IOMMU buffers"
110	range 4 9
111	default 8
112	help
113	  DMA mapping framework by default aligns all buffers to the smallest
114	  PAGE_SIZE order which is greater than or equal to the requested buffer
115	  size. This works well for buffers up to a few hundreds kilobytes, but
116	  for larger buffers it just a waste of address space. Drivers which has
117	  relatively small addressing window (like 64Mib) might run out of
118	  virtual space with just a few allocations.
119
120	  With this parameter you can specify the maximum PAGE_SIZE order for
121	  DMA IOMMU buffers. Larger buffers will be aligned only to this
122	  specified order. The order is expressed as a power of two multiplied
123	  by the PAGE_SIZE.
124
125endif
126
127config MIGHT_HAVE_PCI
128	bool
129
130config SYS_SUPPORTS_APM_EMULATION
131	bool
132
133config HAVE_TCM
134	bool
135	select GENERIC_ALLOCATOR
136
137config HAVE_PROC_CPU
138	bool
139
140config NO_IOPORT_MAP
141	bool
142
143config EISA
144	bool
145	---help---
146	  The Extended Industry Standard Architecture (EISA) bus was
147	  developed as an open alternative to the IBM MicroChannel bus.
148
149	  The EISA bus provided some of the features of the IBM MicroChannel
150	  bus while maintaining backward compatibility with cards made for
151	  the older ISA bus.  The EISA bus saw limited use between 1988 and
152	  1995 when it was made obsolete by the PCI bus.
153
154	  Say Y here if you are building a kernel for an EISA-based machine.
155
156	  Otherwise, say N.
157
158config SBUS
159	bool
160
161config STACKTRACE_SUPPORT
162	bool
163	default y
164
165config HAVE_LATENCYTOP_SUPPORT
166	bool
167	depends on !SMP
168	default y
169
170config LOCKDEP_SUPPORT
171	bool
172	default y
173
174config TRACE_IRQFLAGS_SUPPORT
175	bool
176	default !CPU_V7M
177
178config RWSEM_XCHGADD_ALGORITHM
179	bool
180	default y
181
182config ARCH_HAS_ILOG2_U32
183	bool
184
185config ARCH_HAS_ILOG2_U64
186	bool
187
188config ARCH_HAS_BANDGAP
189	bool
190
191config FIX_EARLYCON_MEM
192	def_bool y if MMU
193
194config GENERIC_HWEIGHT
195	bool
196	default y
197
198config GENERIC_CALIBRATE_DELAY
199	bool
200	default y
201
202config ARCH_MAY_HAVE_PC_FDC
203	bool
204
205config ZONE_DMA
206	bool
207
208config NEED_DMA_MAP_STATE
209       def_bool y
210
211config ARCH_SUPPORTS_UPROBES
212	def_bool y
213
214config ARCH_HAS_DMA_SET_COHERENT_MASK
215	bool
216
217config GENERIC_ISA_DMA
218	bool
219
220config FIQ
221	bool
222
223config NEED_RET_TO_USER
224	bool
225
226config ARCH_MTD_XIP
227	bool
228
229config VECTORS_BASE
230	hex
231	default 0xffff0000 if MMU || CPU_HIGH_VECTOR
232	default DRAM_BASE if REMAP_VECTORS_TO_RAM
233	default 0x00000000
234	help
235	  The base address of exception vectors.  This must be two pages
236	  in size.
237
238config ARM_PATCH_PHYS_VIRT
239	bool "Patch physical to virtual translations at runtime" if EMBEDDED
240	default y
241	depends on !XIP_KERNEL && MMU
242	depends on !ARCH_REALVIEW || !SPARSEMEM
243	help
244	  Patch phys-to-virt and virt-to-phys translation functions at
245	  boot and module load time according to the position of the
246	  kernel in system memory.
247
248	  This can only be used with non-XIP MMU kernels where the base
249	  of physical memory is at a 16MB boundary.
250
251	  Only disable this option if you know that you do not require
252	  this feature (eg, building a kernel for a single machine) and
253	  you need to shrink the kernel to the minimal size.
254
255config NEED_MACH_IO_H
256	bool
257	help
258	  Select this when mach/io.h is required to provide special
259	  definitions for this platform.  The need for mach/io.h should
260	  be avoided when possible.
261
262config NEED_MACH_MEMORY_H
263	bool
264	help
265	  Select this when mach/memory.h is required to provide special
266	  definitions for this platform.  The need for mach/memory.h should
267	  be avoided when possible.
268
269config PHYS_OFFSET
270	hex "Physical address of main memory" if MMU
271	depends on !ARM_PATCH_PHYS_VIRT
272	default DRAM_BASE if !MMU
273	default 0x00000000 if ARCH_EBSA110 || \
274			ARCH_FOOTBRIDGE || \
275			ARCH_INTEGRATOR || \
276			ARCH_IOP13XX || \
277			ARCH_KS8695 || \
278			(ARCH_REALVIEW && !REALVIEW_HIGH_PHYS_OFFSET)
279	default 0x10000000 if ARCH_OMAP1 || ARCH_RPC
280	default 0x20000000 if ARCH_S5PV210
281	default 0x70000000 if REALVIEW_HIGH_PHYS_OFFSET
282	default 0xc0000000 if ARCH_SA1100
283	help
284	  Please provide the physical address corresponding to the
285	  location of main memory in your system.
286
287config GENERIC_BUG
288	def_bool y
289	depends on BUG
290
291config PGTABLE_LEVELS
292	int
293	default 3 if ARM_LPAE
294	default 2
295
296source "init/Kconfig"
297
298source "kernel/Kconfig.freezer"
299
300menu "System Type"
301
302config MMU
303	bool "MMU-based Paged Memory Management Support"
304	default y
305	help
306	  Select if you want MMU-based virtualised addressing space
307	  support by paged memory management. If unsure, say 'Y'.
308
309#
310# The "ARM system type" choice list is ordered alphabetically by option
311# text.  Please add new entries in the option alphabetic order.
312#
313choice
314	prompt "ARM system type"
315	default ARCH_VERSATILE if !MMU
316	default ARCH_MULTIPLATFORM if MMU
317
318config ARCH_MULTIPLATFORM
319	bool "Allow multiple platforms to be selected"
320	depends on MMU
321	select ARCH_WANT_OPTIONAL_GPIOLIB
322	select ARM_HAS_SG_CHAIN
323	select ARM_PATCH_PHYS_VIRT
324	select AUTO_ZRELADDR
325	select CLKSRC_OF
326	select COMMON_CLK
327	select GENERIC_CLOCKEVENTS
328	select MIGHT_HAVE_PCI
329	select MULTI_IRQ_HANDLER
330	select SPARSE_IRQ
331	select USE_OF
332
333config ARM_SINGLE_ARMV7M
334	bool "ARMv7-M based platforms (Cortex-M0/M3/M4)"
335	depends on !MMU
336	select ARCH_WANT_OPTIONAL_GPIOLIB
337	select ARM_NVIC
338	select AUTO_ZRELADDR
339	select CLKSRC_OF
340	select COMMON_CLK
341	select CPU_V7M
342	select GENERIC_CLOCKEVENTS
343	select NO_IOPORT_MAP
344	select SPARSE_IRQ
345	select USE_OF
346
347config ARCH_REALVIEW
348	bool "ARM Ltd. RealView family"
349	select ARCH_WANT_OPTIONAL_GPIOLIB
350	select ARM_AMBA
351	select ARM_TIMER_SP804
352	select COMMON_CLK
353	select COMMON_CLK_VERSATILE
354	select GENERIC_CLOCKEVENTS
355	select GPIO_PL061 if GPIOLIB
356	select ICST
357	select NEED_MACH_MEMORY_H
358	select PLAT_VERSATILE
359	select PLAT_VERSATILE_SCHED_CLOCK
360	help
361	  This enables support for ARM Ltd RealView boards.
362
363config ARCH_VERSATILE
364	bool "ARM Ltd. Versatile family"
365	select ARCH_WANT_OPTIONAL_GPIOLIB
366	select ARM_AMBA
367	select ARM_TIMER_SP804
368	select ARM_VIC
369	select CLKDEV_LOOKUP
370	select GENERIC_CLOCKEVENTS
371	select HAVE_MACH_CLKDEV
372	select ICST
373	select PLAT_VERSATILE
374	select PLAT_VERSATILE_CLOCK
375	select PLAT_VERSATILE_SCHED_CLOCK
376	select VERSATILE_FPGA_IRQ
377	help
378	  This enables support for ARM Ltd Versatile board.
379
380config ARCH_CLPS711X
381	bool "Cirrus Logic CLPS711x/EP721x/EP731x-based"
382	select ARCH_REQUIRE_GPIOLIB
383	select AUTO_ZRELADDR
384	select CLKSRC_MMIO
385	select COMMON_CLK
386	select CPU_ARM720T
387	select GENERIC_CLOCKEVENTS
388	select MFD_SYSCON
389	select SOC_BUS
390	help
391	  Support for Cirrus Logic 711x/721x/731x based boards.
392
393config ARCH_GEMINI
394	bool "Cortina Systems Gemini"
395	select ARCH_REQUIRE_GPIOLIB
396	select CLKSRC_MMIO
397	select CPU_FA526
398	select GENERIC_CLOCKEVENTS
399	help
400	  Support for the Cortina Systems Gemini family SoCs
401
402config ARCH_EBSA110
403	bool "EBSA-110"
404	select ARCH_USES_GETTIMEOFFSET
405	select CPU_SA110
406	select ISA
407	select NEED_MACH_IO_H
408	select NEED_MACH_MEMORY_H
409	select NO_IOPORT_MAP
410	help
411	  This is an evaluation board for the StrongARM processor available
412	  from Digital. It has limited hardware on-board, including an
413	  Ethernet interface, two PCMCIA sockets, two serial ports and a
414	  parallel port.
415
416config ARCH_EP93XX
417	bool "EP93xx-based"
418	select ARCH_HAS_HOLES_MEMORYMODEL
419	select ARCH_REQUIRE_GPIOLIB
420	select ARM_AMBA
421	select ARM_PATCH_PHYS_VIRT
422	select ARM_VIC
423	select AUTO_ZRELADDR
424	select CLKDEV_LOOKUP
425	select CLKSRC_MMIO
426	select CPU_ARM920T
427	select GENERIC_CLOCKEVENTS
428	help
429	  This enables support for the Cirrus EP93xx series of CPUs.
430
431config ARCH_FOOTBRIDGE
432	bool "FootBridge"
433	select CPU_SA110
434	select FOOTBRIDGE
435	select GENERIC_CLOCKEVENTS
436	select HAVE_IDE
437	select NEED_MACH_IO_H if !MMU
438	select NEED_MACH_MEMORY_H
439	help
440	  Support for systems based on the DC21285 companion chip
441	  ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
442
443config ARCH_NETX
444	bool "Hilscher NetX based"
445	select ARM_VIC
446	select CLKSRC_MMIO
447	select CPU_ARM926T
448	select GENERIC_CLOCKEVENTS
449	help
450	  This enables support for systems based on the Hilscher NetX Soc
451
452config ARCH_IOP13XX
453	bool "IOP13xx-based"
454	depends on MMU
455	select CPU_XSC3
456	select NEED_MACH_MEMORY_H
457	select NEED_RET_TO_USER
458	select PCI
459	select PLAT_IOP
460	select VMSPLIT_1G
461	select SPARSE_IRQ
462	help
463	  Support for Intel's IOP13XX (XScale) family of processors.
464
465config ARCH_IOP32X
466	bool "IOP32x-based"
467	depends on MMU
468	select ARCH_REQUIRE_GPIOLIB
469	select CPU_XSCALE
470	select GPIO_IOP
471	select NEED_RET_TO_USER
472	select PCI
473	select PLAT_IOP
474	help
475	  Support for Intel's 80219 and IOP32X (XScale) family of
476	  processors.
477
478config ARCH_IOP33X
479	bool "IOP33x-based"
480	depends on MMU
481	select ARCH_REQUIRE_GPIOLIB
482	select CPU_XSCALE
483	select GPIO_IOP
484	select NEED_RET_TO_USER
485	select PCI
486	select PLAT_IOP
487	help
488	  Support for Intel's IOP33X (XScale) family of processors.
489
490config ARCH_IXP4XX
491	bool "IXP4xx-based"
492	depends on MMU
493	select ARCH_HAS_DMA_SET_COHERENT_MASK
494	select ARCH_REQUIRE_GPIOLIB
495	select ARCH_SUPPORTS_BIG_ENDIAN
496	select CLKSRC_MMIO
497	select CPU_XSCALE
498	select DMABOUNCE if PCI
499	select GENERIC_CLOCKEVENTS
500	select MIGHT_HAVE_PCI
501	select NEED_MACH_IO_H
502	select USB_EHCI_BIG_ENDIAN_DESC
503	select USB_EHCI_BIG_ENDIAN_MMIO
504	help
505	  Support for Intel's IXP4XX (XScale) family of processors.
506
507config ARCH_DOVE
508	bool "Marvell Dove"
509	select ARCH_REQUIRE_GPIOLIB
510	select CPU_PJ4
511	select GENERIC_CLOCKEVENTS
512	select MIGHT_HAVE_PCI
513	select MULTI_IRQ_HANDLER
514	select MVEBU_MBUS
515	select PINCTRL
516	select PINCTRL_DOVE
517	select PLAT_ORION_LEGACY
518	select SPARSE_IRQ
519	help
520	  Support for the Marvell Dove SoC 88AP510
521
522config ARCH_ORION5X
523	bool "Marvell Orion"
524	depends on MMU
525	select ARCH_REQUIRE_GPIOLIB
526	select CPU_FEROCEON
527	select GENERIC_CLOCKEVENTS
528	select MVEBU_MBUS
529	select MULTI_IRQ_HANDLER
530	select PCI
531	select PLAT_ORION_LEGACY
532	select MULTI_IRQ_HANDLER
533	select SPARSE_IRQ
534	help
535	  Support for the following Marvell Orion 5x series SoCs:
536	  Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
537	  Orion-2 (5281), Orion-1-90 (6183).
538
539config ARCH_MMP
540	bool "Marvell PXA168/910/MMP2"
541	depends on MMU
542	select ARCH_REQUIRE_GPIOLIB
543	select CLKDEV_LOOKUP
544	select GENERIC_ALLOCATOR
545	select GENERIC_CLOCKEVENTS
546	select GPIO_PXA
547	select IRQ_DOMAIN
548	select MULTI_IRQ_HANDLER
549	select PINCTRL
550	select PLAT_PXA
551	select SPARSE_IRQ
552	help
553	  Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
554
555config ARCH_KS8695
556	bool "Micrel/Kendin KS8695"
557	select ARCH_REQUIRE_GPIOLIB
558	select CLKSRC_MMIO
559	select CPU_ARM922T
560	select GENERIC_CLOCKEVENTS
561	select NEED_MACH_MEMORY_H
562	help
563	  Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
564	  System-on-Chip devices.
565
566config ARCH_W90X900
567	bool "Nuvoton W90X900 CPU"
568	select ARCH_REQUIRE_GPIOLIB
569	select CLKDEV_LOOKUP
570	select CLKSRC_MMIO
571	select CPU_ARM926T
572	select GENERIC_CLOCKEVENTS
573	help
574	  Support for Nuvoton (Winbond logic dept.) ARM9 processor,
575	  At present, the w90x900 has been renamed nuc900, regarding
576	  the ARM series product line, you can login the following
577	  link address to know more.
578
579	  <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
580		ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
581
582config ARCH_LPC32XX
583	bool "NXP LPC32XX"
584	select ARCH_REQUIRE_GPIOLIB
585	select ARM_AMBA
586	select CLKDEV_LOOKUP
587	select CLKSRC_MMIO
588	select CPU_ARM926T
589	select GENERIC_CLOCKEVENTS
590	select HAVE_IDE
591	select USE_OF
592	help
593	  Support for the NXP LPC32XX family of processors
594
595config ARCH_PXA
596	bool "PXA2xx/PXA3xx-based"
597	depends on MMU
598	select ARCH_MTD_XIP
599	select ARCH_REQUIRE_GPIOLIB
600	select ARM_CPU_SUSPEND if PM
601	select AUTO_ZRELADDR
602	select COMMON_CLK
603	select CLKDEV_LOOKUP
604	select CLKSRC_MMIO
605	select CLKSRC_OF
606	select GENERIC_CLOCKEVENTS
607	select GPIO_PXA
608	select HAVE_IDE
609	select IRQ_DOMAIN
610	select MULTI_IRQ_HANDLER
611	select PLAT_PXA
612	select SPARSE_IRQ
613	help
614	  Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
615
616config ARCH_RPC
617	bool "RiscPC"
618	depends on MMU
619	select ARCH_ACORN
620	select ARCH_MAY_HAVE_PC_FDC
621	select ARCH_SPARSEMEM_ENABLE
622	select ARCH_USES_GETTIMEOFFSET
623	select CPU_SA110
624	select FIQ
625	select HAVE_IDE
626	select HAVE_PATA_PLATFORM
627	select ISA_DMA_API
628	select NEED_MACH_IO_H
629	select NEED_MACH_MEMORY_H
630	select NO_IOPORT_MAP
631	select VIRT_TO_BUS
632	help
633	  On the Acorn Risc-PC, Linux can support the internal IDE disk and
634	  CD-ROM interface, serial and parallel port, and the floppy drive.
635
636config ARCH_SA1100
637	bool "SA1100-based"
638	select ARCH_MTD_XIP
639	select ARCH_REQUIRE_GPIOLIB
640	select ARCH_SPARSEMEM_ENABLE
641	select CLKDEV_LOOKUP
642	select CLKSRC_MMIO
643	select CPU_FREQ
644	select CPU_SA1100
645	select GENERIC_CLOCKEVENTS
646	select HAVE_IDE
647	select IRQ_DOMAIN
648	select ISA
649	select MULTI_IRQ_HANDLER
650	select NEED_MACH_MEMORY_H
651	select SPARSE_IRQ
652	help
653	  Support for StrongARM 11x0 based boards.
654
655config ARCH_S3C24XX
656	bool "Samsung S3C24XX SoCs"
657	select ARCH_REQUIRE_GPIOLIB
658	select ATAGS
659	select CLKDEV_LOOKUP
660	select CLKSRC_SAMSUNG_PWM
661	select GENERIC_CLOCKEVENTS
662	select GPIO_SAMSUNG
663	select HAVE_S3C2410_I2C if I2C
664	select HAVE_S3C2410_WATCHDOG if WATCHDOG
665	select HAVE_S3C_RTC if RTC_CLASS
666	select MULTI_IRQ_HANDLER
667	select NEED_MACH_IO_H
668	select SAMSUNG_ATAGS
669	help
670	  Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443
671	  and S3C2450 SoCs based systems, such as the Simtec Electronics BAST
672	  (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or the
673	  Samsung SMDK2410 development board (and derivatives).
674
675config ARCH_S3C64XX
676	bool "Samsung S3C64XX"
677	select ARCH_REQUIRE_GPIOLIB
678	select ARM_AMBA
679	select ARM_VIC
680	select ATAGS
681	select CLKDEV_LOOKUP
682	select CLKSRC_SAMSUNG_PWM
683	select COMMON_CLK_SAMSUNG
684	select CPU_V6K
685	select GENERIC_CLOCKEVENTS
686	select GPIO_SAMSUNG
687	select HAVE_S3C2410_I2C if I2C
688	select HAVE_S3C2410_WATCHDOG if WATCHDOG
689	select HAVE_TCM
690	select NO_IOPORT_MAP
691	select PLAT_SAMSUNG
692	select PM_GENERIC_DOMAINS if PM
693	select S3C_DEV_NAND
694	select S3C_GPIO_TRACK
695	select SAMSUNG_ATAGS
696	select SAMSUNG_WAKEMASK
697	select SAMSUNG_WDT_RESET
698	help
699	  Samsung S3C64XX series based systems
700
701config ARCH_DAVINCI
702	bool "TI DaVinci"
703	select ARCH_HAS_HOLES_MEMORYMODEL
704	select ARCH_REQUIRE_GPIOLIB
705	select CLKDEV_LOOKUP
706	select GENERIC_ALLOCATOR
707	select GENERIC_CLOCKEVENTS
708	select GENERIC_IRQ_CHIP
709	select HAVE_IDE
710	select USE_OF
711	select ZONE_DMA
712	help
713	  Support for TI's DaVinci platform.
714
715config ARCH_OMAP1
716	bool "TI OMAP1"
717	depends on MMU
718	select ARCH_HAS_HOLES_MEMORYMODEL
719	select ARCH_OMAP
720	select ARCH_REQUIRE_GPIOLIB
721	select CLKDEV_LOOKUP
722	select CLKSRC_MMIO
723	select GENERIC_CLOCKEVENTS
724	select GENERIC_IRQ_CHIP
725	select HAVE_IDE
726	select IRQ_DOMAIN
727	select MULTI_IRQ_HANDLER
728	select NEED_MACH_IO_H if PCCARD
729	select NEED_MACH_MEMORY_H
730	select SPARSE_IRQ
731	help
732	  Support for older TI OMAP1 (omap7xx, omap15xx or omap16xx)
733
734endchoice
735
736menu "Multiple platform selection"
737	depends on ARCH_MULTIPLATFORM
738
739comment "CPU Core family selection"
740
741config ARCH_MULTI_V4
742	bool "ARMv4 based platforms (FA526)"
743	depends on !ARCH_MULTI_V6_V7
744	select ARCH_MULTI_V4_V5
745	select CPU_FA526
746
747config ARCH_MULTI_V4T
748	bool "ARMv4T based platforms (ARM720T, ARM920T, ...)"
749	depends on !ARCH_MULTI_V6_V7
750	select ARCH_MULTI_V4_V5
751	select CPU_ARM920T if !(CPU_ARM7TDMI || CPU_ARM720T || \
752		CPU_ARM740T || CPU_ARM9TDMI || CPU_ARM922T || \
753		CPU_ARM925T || CPU_ARM940T)
754
755config ARCH_MULTI_V5
756	bool "ARMv5 based platforms (ARM926T, XSCALE, PJ1, ...)"
757	depends on !ARCH_MULTI_V6_V7
758	select ARCH_MULTI_V4_V5
759	select CPU_ARM926T if !(CPU_ARM946E || CPU_ARM1020 || \
760		CPU_ARM1020E || CPU_ARM1022 || CPU_ARM1026 || \
761		CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_FEROCEON)
762
763config ARCH_MULTI_V4_V5
764	bool
765
766config ARCH_MULTI_V6
767	bool "ARMv6 based platforms (ARM11)"
768	select ARCH_MULTI_V6_V7
769	select CPU_V6K
770
771config ARCH_MULTI_V7
772	bool "ARMv7 based platforms (Cortex-A, PJ4, Scorpion, Krait)"
773	default y
774	select ARCH_MULTI_V6_V7
775	select CPU_V7
776	select HAVE_SMP
777
778config ARCH_MULTI_V6_V7
779	bool
780	select MIGHT_HAVE_CACHE_L2X0
781
782config ARCH_MULTI_CPU_AUTO
783	def_bool !(ARCH_MULTI_V4 || ARCH_MULTI_V4T || ARCH_MULTI_V6_V7)
784	select ARCH_MULTI_V5
785
786endmenu
787
788config ARCH_VIRT
789	bool "Dummy Virtual Machine" if ARCH_MULTI_V7
790	select ARM_AMBA
791	select ARM_GIC
792	select ARM_GIC_V3
793	select ARM_PSCI
794	select HAVE_ARM_ARCH_TIMER
795
796#
797# This is sorted alphabetically by mach-* pathname.  However, plat-*
798# Kconfigs may be included either alphabetically (according to the
799# plat- suffix) or along side the corresponding mach-* source.
800#
801source "arch/arm/mach-mvebu/Kconfig"
802
803source "arch/arm/mach-alpine/Kconfig"
804
805source "arch/arm/mach-asm9260/Kconfig"
806
807source "arch/arm/mach-at91/Kconfig"
808
809source "arch/arm/mach-axxia/Kconfig"
810
811source "arch/arm/mach-bcm/Kconfig"
812
813source "arch/arm/mach-berlin/Kconfig"
814
815source "arch/arm/mach-clps711x/Kconfig"
816
817source "arch/arm/mach-cns3xxx/Kconfig"
818
819source "arch/arm/mach-davinci/Kconfig"
820
821source "arch/arm/mach-digicolor/Kconfig"
822
823source "arch/arm/mach-dove/Kconfig"
824
825source "arch/arm/mach-ep93xx/Kconfig"
826
827source "arch/arm/mach-footbridge/Kconfig"
828
829source "arch/arm/mach-gemini/Kconfig"
830
831source "arch/arm/mach-highbank/Kconfig"
832
833source "arch/arm/mach-hisi/Kconfig"
834
835source "arch/arm/mach-integrator/Kconfig"
836
837source "arch/arm/mach-iop32x/Kconfig"
838
839source "arch/arm/mach-iop33x/Kconfig"
840
841source "arch/arm/mach-iop13xx/Kconfig"
842
843source "arch/arm/mach-ixp4xx/Kconfig"
844
845source "arch/arm/mach-keystone/Kconfig"
846
847source "arch/arm/mach-ks8695/Kconfig"
848
849source "arch/arm/mach-meson/Kconfig"
850
851source "arch/arm/mach-moxart/Kconfig"
852
853source "arch/arm/mach-mv78xx0/Kconfig"
854
855source "arch/arm/mach-imx/Kconfig"
856
857source "arch/arm/mach-mediatek/Kconfig"
858
859source "arch/arm/mach-mxs/Kconfig"
860
861source "arch/arm/mach-netx/Kconfig"
862
863source "arch/arm/mach-nomadik/Kconfig"
864
865source "arch/arm/mach-nspire/Kconfig"
866
867source "arch/arm/plat-omap/Kconfig"
868
869source "arch/arm/mach-omap1/Kconfig"
870
871source "arch/arm/mach-omap2/Kconfig"
872
873source "arch/arm/mach-orion5x/Kconfig"
874
875source "arch/arm/mach-picoxcell/Kconfig"
876
877source "arch/arm/mach-pxa/Kconfig"
878source "arch/arm/plat-pxa/Kconfig"
879
880source "arch/arm/mach-mmp/Kconfig"
881
882source "arch/arm/mach-qcom/Kconfig"
883
884source "arch/arm/mach-realview/Kconfig"
885
886source "arch/arm/mach-rockchip/Kconfig"
887
888source "arch/arm/mach-sa1100/Kconfig"
889
890source "arch/arm/mach-socfpga/Kconfig"
891
892source "arch/arm/mach-spear/Kconfig"
893
894source "arch/arm/mach-sti/Kconfig"
895
896source "arch/arm/mach-s3c24xx/Kconfig"
897
898source "arch/arm/mach-s3c64xx/Kconfig"
899
900source "arch/arm/mach-s5pv210/Kconfig"
901
902source "arch/arm/mach-exynos/Kconfig"
903source "arch/arm/plat-samsung/Kconfig"
904
905source "arch/arm/mach-shmobile/Kconfig"
906
907source "arch/arm/mach-sunxi/Kconfig"
908
909source "arch/arm/mach-prima2/Kconfig"
910
911source "arch/arm/mach-tegra/Kconfig"
912
913source "arch/arm/mach-u300/Kconfig"
914
915source "arch/arm/mach-uniphier/Kconfig"
916
917source "arch/arm/mach-ux500/Kconfig"
918
919source "arch/arm/mach-versatile/Kconfig"
920
921source "arch/arm/mach-vexpress/Kconfig"
922source "arch/arm/plat-versatile/Kconfig"
923
924source "arch/arm/mach-vt8500/Kconfig"
925
926source "arch/arm/mach-w90x900/Kconfig"
927
928source "arch/arm/mach-zx/Kconfig"
929
930source "arch/arm/mach-zynq/Kconfig"
931
932# ARMv7-M architecture
933config ARCH_EFM32
934	bool "Energy Micro efm32"
935	depends on ARM_SINGLE_ARMV7M
936	select ARCH_REQUIRE_GPIOLIB
937	help
938	  Support for Energy Micro's (now Silicon Labs) efm32 Giant Gecko
939	  processors.
940
941config ARCH_LPC18XX
942	bool "NXP LPC18xx/LPC43xx"
943	depends on ARM_SINGLE_ARMV7M
944	select ARCH_HAS_RESET_CONTROLLER
945	select ARM_AMBA
946	select CLKSRC_LPC32XX
947	select PINCTRL
948	help
949	  Support for NXP's LPC18xx Cortex-M3 and LPC43xx Cortex-M4
950	  high performance microcontrollers.
951
952config ARCH_STM32
953	bool "STMicrolectronics STM32"
954	depends on ARM_SINGLE_ARMV7M
955	select ARCH_HAS_RESET_CONTROLLER
956	select ARMV7M_SYSTICK
957	select CLKSRC_STM32
958	select RESET_CONTROLLER
959	help
960	  Support for STMicroelectronics STM32 processors.
961
962# Definitions to make life easier
963config ARCH_ACORN
964	bool
965
966config PLAT_IOP
967	bool
968	select GENERIC_CLOCKEVENTS
969
970config PLAT_ORION
971	bool
972	select CLKSRC_MMIO
973	select COMMON_CLK
974	select GENERIC_IRQ_CHIP
975	select IRQ_DOMAIN
976
977config PLAT_ORION_LEGACY
978	bool
979	select PLAT_ORION
980
981config PLAT_PXA
982	bool
983
984config PLAT_VERSATILE
985	bool
986
987source "arch/arm/firmware/Kconfig"
988
989source arch/arm/mm/Kconfig
990
991config IWMMXT
992	bool "Enable iWMMXt support"
993	depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4 || CPU_PJ4B
994	default y if PXA27x || PXA3xx || ARCH_MMP || CPU_PJ4 || CPU_PJ4B
995	help
996	  Enable support for iWMMXt context switching at run time if
997	  running on a CPU that supports it.
998
999config MULTI_IRQ_HANDLER
1000	bool
1001	help
1002	  Allow each machine to specify it's own IRQ handler at run time.
1003
1004if !MMU
1005source "arch/arm/Kconfig-nommu"
1006endif
1007
1008config PJ4B_ERRATA_4742
1009	bool "PJ4B Errata 4742: IDLE Wake Up Commands can Cause the CPU Core to Cease Operation"
1010	depends on CPU_PJ4B && MACH_ARMADA_370
1011	default y
1012	help
1013	  When coming out of either a Wait for Interrupt (WFI) or a Wait for
1014	  Event (WFE) IDLE states, a specific timing sensitivity exists between
1015	  the retiring WFI/WFE instructions and the newly issued subsequent
1016	  instructions.  This sensitivity can result in a CPU hang scenario.
1017	  Workaround:
1018	  The software must insert either a Data Synchronization Barrier (DSB)
1019	  or Data Memory Barrier (DMB) command immediately after the WFI/WFE
1020	  instruction
1021
1022config ARM_ERRATA_326103
1023	bool "ARM errata: FSR write bit incorrect on a SWP to read-only memory"
1024	depends on CPU_V6
1025	help
1026	  Executing a SWP instruction to read-only memory does not set bit 11
1027	  of the FSR on the ARM 1136 prior to r1p0. This causes the kernel to
1028	  treat the access as a read, preventing a COW from occurring and
1029	  causing the faulting task to livelock.
1030
1031config ARM_ERRATA_411920
1032	bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
1033	depends on CPU_V6 || CPU_V6K
1034	help
1035	  Invalidation of the Instruction Cache operation can
1036	  fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
1037	  It does not affect the MPCore. This option enables the ARM Ltd.
1038	  recommended workaround.
1039
1040config ARM_ERRATA_430973
1041	bool "ARM errata: Stale prediction on replaced interworking branch"
1042	depends on CPU_V7
1043	help
1044	  This option enables the workaround for the 430973 Cortex-A8
1045	  r1p* erratum. If a code sequence containing an ARM/Thumb
1046	  interworking branch is replaced with another code sequence at the
1047	  same virtual address, whether due to self-modifying code or virtual
1048	  to physical address re-mapping, Cortex-A8 does not recover from the
1049	  stale interworking branch prediction. This results in Cortex-A8
1050	  executing the new code sequence in the incorrect ARM or Thumb state.
1051	  The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
1052	  and also flushes the branch target cache at every context switch.
1053	  Note that setting specific bits in the ACTLR register may not be
1054	  available in non-secure mode.
1055
1056config ARM_ERRATA_458693
1057	bool "ARM errata: Processor deadlock when a false hazard is created"
1058	depends on CPU_V7
1059	depends on !ARCH_MULTIPLATFORM
1060	help
1061	  This option enables the workaround for the 458693 Cortex-A8 (r2p0)
1062	  erratum. For very specific sequences of memory operations, it is
1063	  possible for a hazard condition intended for a cache line to instead
1064	  be incorrectly associated with a different cache line. This false
1065	  hazard might then cause a processor deadlock. The workaround enables
1066	  the L1 caching of the NEON accesses and disables the PLD instruction
1067	  in the ACTLR register. Note that setting specific bits in the ACTLR
1068	  register may not be available in non-secure mode.
1069
1070config ARM_ERRATA_460075
1071	bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
1072	depends on CPU_V7
1073	depends on !ARCH_MULTIPLATFORM
1074	help
1075	  This option enables the workaround for the 460075 Cortex-A8 (r2p0)
1076	  erratum. Any asynchronous access to the L2 cache may encounter a
1077	  situation in which recent store transactions to the L2 cache are lost
1078	  and overwritten with stale memory contents from external memory. The
1079	  workaround disables the write-allocate mode for the L2 cache via the
1080	  ACTLR register. Note that setting specific bits in the ACTLR register
1081	  may not be available in non-secure mode.
1082
1083config ARM_ERRATA_742230
1084	bool "ARM errata: DMB operation may be faulty"
1085	depends on CPU_V7 && SMP
1086	depends on !ARCH_MULTIPLATFORM
1087	help
1088	  This option enables the workaround for the 742230 Cortex-A9
1089	  (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
1090	  between two write operations may not ensure the correct visibility
1091	  ordering of the two writes. This workaround sets a specific bit in
1092	  the diagnostic register of the Cortex-A9 which causes the DMB
1093	  instruction to behave as a DSB, ensuring the correct behaviour of
1094	  the two writes.
1095
1096config ARM_ERRATA_742231
1097	bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
1098	depends on CPU_V7 && SMP
1099	depends on !ARCH_MULTIPLATFORM
1100	help
1101	  This option enables the workaround for the 742231 Cortex-A9
1102	  (r2p0..r2p2) erratum. Under certain conditions, specific to the
1103	  Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
1104	  accessing some data located in the same cache line, may get corrupted
1105	  data due to bad handling of the address hazard when the line gets
1106	  replaced from one of the CPUs at the same time as another CPU is
1107	  accessing it. This workaround sets specific bits in the diagnostic
1108	  register of the Cortex-A9 which reduces the linefill issuing
1109	  capabilities of the processor.
1110
1111config ARM_ERRATA_643719
1112	bool "ARM errata: LoUIS bit field in CLIDR register is incorrect"
1113	depends on CPU_V7 && SMP
1114	default y
1115	help
1116	  This option enables the workaround for the 643719 Cortex-A9 (prior to
1117	  r1p0) erratum. On affected cores the LoUIS bit field of the CLIDR
1118	  register returns zero when it should return one. The workaround
1119	  corrects this value, ensuring cache maintenance operations which use
1120	  it behave as intended and avoiding data corruption.
1121
1122config ARM_ERRATA_720789
1123	bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
1124	depends on CPU_V7
1125	help
1126	  This option enables the workaround for the 720789 Cortex-A9 (prior to
1127	  r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
1128	  broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
1129	  As a consequence of this erratum, some TLB entries which should be
1130	  invalidated are not, resulting in an incoherency in the system page
1131	  tables. The workaround changes the TLB flushing routines to invalidate
1132	  entries regardless of the ASID.
1133
1134config ARM_ERRATA_743622
1135	bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
1136	depends on CPU_V7
1137	depends on !ARCH_MULTIPLATFORM
1138	help
1139	  This option enables the workaround for the 743622 Cortex-A9
1140	  (r2p*) erratum. Under very rare conditions, a faulty
1141	  optimisation in the Cortex-A9 Store Buffer may lead to data
1142	  corruption. This workaround sets a specific bit in the diagnostic
1143	  register of the Cortex-A9 which disables the Store Buffer
1144	  optimisation, preventing the defect from occurring. This has no
1145	  visible impact on the overall performance or power consumption of the
1146	  processor.
1147
1148config ARM_ERRATA_751472
1149	bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
1150	depends on CPU_V7
1151	depends on !ARCH_MULTIPLATFORM
1152	help
1153	  This option enables the workaround for the 751472 Cortex-A9 (prior
1154	  to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
1155	  completion of a following broadcasted operation if the second
1156	  operation is received by a CPU before the ICIALLUIS has completed,
1157	  potentially leading to corrupted entries in the cache or TLB.
1158
1159config ARM_ERRATA_754322
1160	bool "ARM errata: possible faulty MMU translations following an ASID switch"
1161	depends on CPU_V7
1162	help
1163	  This option enables the workaround for the 754322 Cortex-A9 (r2p*,
1164	  r3p*) erratum. A speculative memory access may cause a page table walk
1165	  which starts prior to an ASID switch but completes afterwards. This
1166	  can populate the micro-TLB with a stale entry which may be hit with
1167	  the new ASID. This workaround places two dsb instructions in the mm
1168	  switching code so that no page table walks can cross the ASID switch.
1169
1170config ARM_ERRATA_754327
1171	bool "ARM errata: no automatic Store Buffer drain"
1172	depends on CPU_V7 && SMP
1173	help
1174	  This option enables the workaround for the 754327 Cortex-A9 (prior to
1175	  r2p0) erratum. The Store Buffer does not have any automatic draining
1176	  mechanism and therefore a livelock may occur if an external agent
1177	  continuously polls a memory location waiting to observe an update.
1178	  This workaround defines cpu_relax() as smp_mb(), preventing correctly
1179	  written polling loops from denying visibility of updates to memory.
1180
1181config ARM_ERRATA_364296
1182	bool "ARM errata: Possible cache data corruption with hit-under-miss enabled"
1183	depends on CPU_V6
1184	help
1185	  This options enables the workaround for the 364296 ARM1136
1186	  r0p2 erratum (possible cache data corruption with
1187	  hit-under-miss enabled). It sets the undocumented bit 31 in
1188	  the auxiliary control register and the FI bit in the control
1189	  register, thus disabling hit-under-miss without putting the
1190	  processor into full low interrupt latency mode. ARM11MPCore
1191	  is not affected.
1192
1193config ARM_ERRATA_764369
1194	bool "ARM errata: Data cache line maintenance operation by MVA may not succeed"
1195	depends on CPU_V7 && SMP
1196	help
1197	  This option enables the workaround for erratum 764369
1198	  affecting Cortex-A9 MPCore with two or more processors (all
1199	  current revisions). Under certain timing circumstances, a data
1200	  cache line maintenance operation by MVA targeting an Inner
1201	  Shareable memory region may fail to proceed up to either the
1202	  Point of Coherency or to the Point of Unification of the
1203	  system. This workaround adds a DSB instruction before the
1204	  relevant cache maintenance functions and sets a specific bit
1205	  in the diagnostic control register of the SCU.
1206
1207config ARM_ERRATA_775420
1208       bool "ARM errata: A data cache maintenance operation which aborts, might lead to deadlock"
1209       depends on CPU_V7
1210       help
1211	 This option enables the workaround for the 775420 Cortex-A9 (r2p2,
1212	 r2p6,r2p8,r2p10,r3p0) erratum. In case a date cache maintenance
1213	 operation aborts with MMU exception, it might cause the processor
1214	 to deadlock. This workaround puts DSB before executing ISB if
1215	 an abort may occur on cache maintenance.
1216
1217config ARM_ERRATA_798181
1218	bool "ARM errata: TLBI/DSB failure on Cortex-A15"
1219	depends on CPU_V7 && SMP
1220	help
1221	  On Cortex-A15 (r0p0..r3p2) the TLBI*IS/DSB operations are not
1222	  adequately shooting down all use of the old entries. This
1223	  option enables the Linux kernel workaround for this erratum
1224	  which sends an IPI to the CPUs that are running the same ASID
1225	  as the one being invalidated.
1226
1227config ARM_ERRATA_773022
1228	bool "ARM errata: incorrect instructions may be executed from loop buffer"
1229	depends on CPU_V7
1230	help
1231	  This option enables the workaround for the 773022 Cortex-A15
1232	  (up to r0p4) erratum. In certain rare sequences of code, the
1233	  loop buffer may deliver incorrect instructions. This
1234	  workaround disables the loop buffer to avoid the erratum.
1235
1236endmenu
1237
1238source "arch/arm/common/Kconfig"
1239
1240menu "Bus support"
1241
1242config ISA
1243	bool
1244	help
1245	  Find out whether you have ISA slots on your motherboard.  ISA is the
1246	  name of a bus system, i.e. the way the CPU talks to the other stuff
1247	  inside your box.  Other bus systems are PCI, EISA, MicroChannel
1248	  (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
1249	  newer boards don't support it.  If you have ISA, say Y, otherwise N.
1250
1251# Select ISA DMA controller support
1252config ISA_DMA
1253	bool
1254	select ISA_DMA_API
1255
1256# Select ISA DMA interface
1257config ISA_DMA_API
1258	bool
1259
1260config PCI
1261	bool "PCI support" if MIGHT_HAVE_PCI
1262	help
1263	  Find out whether you have a PCI motherboard. PCI is the name of a
1264	  bus system, i.e. the way the CPU talks to the other stuff inside
1265	  your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
1266	  VESA. If you have PCI, say Y, otherwise N.
1267
1268config PCI_DOMAINS
1269	bool
1270	depends on PCI
1271
1272config PCI_DOMAINS_GENERIC
1273	def_bool PCI_DOMAINS
1274
1275config PCI_NANOENGINE
1276	bool "BSE nanoEngine PCI support"
1277	depends on SA1100_NANOENGINE
1278	help
1279	  Enable PCI on the BSE nanoEngine board.
1280
1281config PCI_SYSCALL
1282	def_bool PCI
1283
1284config PCI_HOST_ITE8152
1285	bool
1286	depends on PCI && MACH_ARMCORE
1287	default y
1288	select DMABOUNCE
1289
1290source "drivers/pci/Kconfig"
1291source "drivers/pci/pcie/Kconfig"
1292
1293source "drivers/pcmcia/Kconfig"
1294
1295endmenu
1296
1297menu "Kernel Features"
1298
1299config HAVE_SMP
1300	bool
1301	help
1302	  This option should be selected by machines which have an SMP-
1303	  capable CPU.
1304
1305	  The only effect of this option is to make the SMP-related
1306	  options available to the user for configuration.
1307
1308config SMP
1309	bool "Symmetric Multi-Processing"
1310	depends on CPU_V6K || CPU_V7
1311	depends on GENERIC_CLOCKEVENTS
1312	depends on HAVE_SMP
1313	depends on MMU || ARM_MPU
1314	select IRQ_WORK
1315	help
1316	  This enables support for systems with more than one CPU. If you have
1317	  a system with only one CPU, say N. If you have a system with more
1318	  than one CPU, say Y.
1319
1320	  If you say N here, the kernel will run on uni- and multiprocessor
1321	  machines, but will use only one CPU of a multiprocessor machine. If
1322	  you say Y here, the kernel will run on many, but not all,
1323	  uniprocessor machines. On a uniprocessor machine, the kernel
1324	  will run faster if you say N here.
1325
1326	  See also <file:Documentation/x86/i386/IO-APIC.txt>,
1327	  <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
1328	  <http://tldp.org/HOWTO/SMP-HOWTO.html>.
1329
1330	  If you don't know what to do here, say N.
1331
1332config SMP_ON_UP
1333	bool "Allow booting SMP kernel on uniprocessor systems"
1334	depends on SMP && !XIP_KERNEL && MMU
1335	default y
1336	help
1337	  SMP kernels contain instructions which fail on non-SMP processors.
1338	  Enabling this option allows the kernel to modify itself to make
1339	  these instructions safe.  Disabling it allows about 1K of space
1340	  savings.
1341
1342	  If you don't know what to do here, say Y.
1343
1344config ARM_CPU_TOPOLOGY
1345	bool "Support cpu topology definition"
1346	depends on SMP && CPU_V7
1347	default y
1348	help
1349	  Support ARM cpu topology definition. The MPIDR register defines
1350	  affinity between processors which is then used to describe the cpu
1351	  topology of an ARM System.
1352
1353config SCHED_MC
1354	bool "Multi-core scheduler support"
1355	depends on ARM_CPU_TOPOLOGY
1356	help
1357	  Multi-core scheduler support improves the CPU scheduler's decision
1358	  making when dealing with multi-core CPU chips at a cost of slightly
1359	  increased overhead in some places. If unsure say N here.
1360
1361config SCHED_SMT
1362	bool "SMT scheduler support"
1363	depends on ARM_CPU_TOPOLOGY
1364	help
1365	  Improves the CPU scheduler's decision making when dealing with
1366	  MultiThreading at a cost of slightly increased overhead in some
1367	  places. If unsure say N here.
1368
1369config HAVE_ARM_SCU
1370	bool
1371	help
1372	  This option enables support for the ARM system coherency unit
1373
1374config HAVE_ARM_ARCH_TIMER
1375	bool "Architected timer support"
1376	depends on CPU_V7
1377	select ARM_ARCH_TIMER
1378	select GENERIC_CLOCKEVENTS
1379	help
1380	  This option enables support for the ARM architected timer
1381
1382config HAVE_ARM_TWD
1383	bool
1384	select CLKSRC_OF if OF
1385	help
1386	  This options enables support for the ARM timer and watchdog unit
1387
1388config MCPM
1389	bool "Multi-Cluster Power Management"
1390	depends on CPU_V7 && SMP
1391	help
1392	  This option provides the common power management infrastructure
1393	  for (multi-)cluster based systems, such as big.LITTLE based
1394	  systems.
1395
1396config MCPM_QUAD_CLUSTER
1397	bool
1398	depends on MCPM
1399	help
1400	  To avoid wasting resources unnecessarily, MCPM only supports up
1401	  to 2 clusters by default.
1402	  Platforms with 3 or 4 clusters that use MCPM must select this
1403	  option to allow the additional clusters to be managed.
1404
1405config BIG_LITTLE
1406	bool "big.LITTLE support (Experimental)"
1407	depends on CPU_V7 && SMP
1408	select MCPM
1409	help
1410	  This option enables support selections for the big.LITTLE
1411	  system architecture.
1412
1413config BL_SWITCHER
1414	bool "big.LITTLE switcher support"
1415	depends on BIG_LITTLE && MCPM && HOTPLUG_CPU
1416	select ARM_CPU_SUSPEND
1417	select CPU_PM
1418	help
1419	  The big.LITTLE "switcher" provides the core functionality to
1420	  transparently handle transition between a cluster of A15's
1421	  and a cluster of A7's in a big.LITTLE system.
1422
1423config BL_SWITCHER_DUMMY_IF
1424	tristate "Simple big.LITTLE switcher user interface"
1425	depends on BL_SWITCHER && DEBUG_KERNEL
1426	help
1427	  This is a simple and dummy char dev interface to control
1428	  the big.LITTLE switcher core code.  It is meant for
1429	  debugging purposes only.
1430
1431choice
1432	prompt "Memory split"
1433	depends on MMU
1434	default VMSPLIT_3G
1435	help
1436	  Select the desired split between kernel and user memory.
1437
1438	  If you are not absolutely sure what you are doing, leave this
1439	  option alone!
1440
1441	config VMSPLIT_3G
1442		bool "3G/1G user/kernel split"
1443	config VMSPLIT_3G_OPT
1444		bool "3G/1G user/kernel split (for full 1G low memory)"
1445	config VMSPLIT_2G
1446		bool "2G/2G user/kernel split"
1447	config VMSPLIT_1G
1448		bool "1G/3G user/kernel split"
1449endchoice
1450
1451config PAGE_OFFSET
1452	hex
1453	default PHYS_OFFSET if !MMU
1454	default 0x40000000 if VMSPLIT_1G
1455	default 0x80000000 if VMSPLIT_2G
1456	default 0xB0000000 if VMSPLIT_3G_OPT
1457	default 0xC0000000
1458
1459config NR_CPUS
1460	int "Maximum number of CPUs (2-32)"
1461	range 2 32
1462	depends on SMP
1463	default "4"
1464
1465config HOTPLUG_CPU
1466	bool "Support for hot-pluggable CPUs"
1467	depends on SMP
1468	help
1469	  Say Y here to experiment with turning CPUs off and on.  CPUs
1470	  can be controlled through /sys/devices/system/cpu.
1471
1472config ARM_PSCI
1473	bool "Support for the ARM Power State Coordination Interface (PSCI)"
1474	depends on CPU_V7
1475	select ARM_PSCI_FW
1476	help
1477	  Say Y here if you want Linux to communicate with system firmware
1478	  implementing the PSCI specification for CPU-centric power
1479	  management operations described in ARM document number ARM DEN
1480	  0022A ("Power State Coordination Interface System Software on
1481	  ARM processors").
1482
1483# The GPIO number here must be sorted by descending number. In case of
1484# a multiplatform kernel, we just want the highest value required by the
1485# selected platforms.
1486config ARCH_NR_GPIO
1487	int
1488	default 1024 if ARCH_BRCMSTB || ARCH_SHMOBILE || ARCH_TEGRA || \
1489		ARCH_ZYNQ
1490	default 512 if ARCH_EXYNOS || ARCH_KEYSTONE || SOC_OMAP5 || \
1491		SOC_DRA7XX || ARCH_S3C24XX || ARCH_S3C64XX || ARCH_S5PV210
1492	default 416 if ARCH_SUNXI
1493	default 392 if ARCH_U8500
1494	default 352 if ARCH_VT8500
1495	default 288 if ARCH_ROCKCHIP
1496	default 264 if MACH_H4700
1497	default 0
1498	help
1499	  Maximum number of GPIOs in the system.
1500
1501	  If unsure, leave the default value.
1502
1503source kernel/Kconfig.preempt
1504
1505config HZ_FIXED
1506	int
1507	default 200 if ARCH_EBSA110 || ARCH_S3C24XX || \
1508		ARCH_S5PV210 || ARCH_EXYNOS4
1509	default 128 if SOC_AT91RM9200
1510	default 0
1511
1512choice
1513	depends on HZ_FIXED = 0
1514	prompt "Timer frequency"
1515
1516config HZ_100
1517	bool "100 Hz"
1518
1519config HZ_200
1520	bool "200 Hz"
1521
1522config HZ_250
1523	bool "250 Hz"
1524
1525config HZ_300
1526	bool "300 Hz"
1527
1528config HZ_500
1529	bool "500 Hz"
1530
1531config HZ_1000
1532	bool "1000 Hz"
1533
1534endchoice
1535
1536config HZ
1537	int
1538	default HZ_FIXED if HZ_FIXED != 0
1539	default 100 if HZ_100
1540	default 200 if HZ_200
1541	default 250 if HZ_250
1542	default 300 if HZ_300
1543	default 500 if HZ_500
1544	default 1000
1545
1546config SCHED_HRTICK
1547	def_bool HIGH_RES_TIMERS
1548
1549config THUMB2_KERNEL
1550	bool "Compile the kernel in Thumb-2 mode" if !CPU_THUMBONLY
1551	depends on (CPU_V7 || CPU_V7M) && !CPU_V6 && !CPU_V6K
1552	default y if CPU_THUMBONLY
1553	select AEABI
1554	select ARM_ASM_UNIFIED
1555	select ARM_UNWIND
1556	help
1557	  By enabling this option, the kernel will be compiled in
1558	  Thumb-2 mode. A compiler/assembler that understand the unified
1559	  ARM-Thumb syntax is needed.
1560
1561	  If unsure, say N.
1562
1563config THUMB2_AVOID_R_ARM_THM_JUMP11
1564	bool "Work around buggy Thumb-2 short branch relocations in gas"
1565	depends on THUMB2_KERNEL && MODULES
1566	default y
1567	help
1568	  Various binutils versions can resolve Thumb-2 branches to
1569	  locally-defined, preemptible global symbols as short-range "b.n"
1570	  branch instructions.
1571
1572	  This is a problem, because there's no guarantee the final
1573	  destination of the symbol, or any candidate locations for a
1574	  trampoline, are within range of the branch.  For this reason, the
1575	  kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
1576	  relocation in modules at all, and it makes little sense to add
1577	  support.
1578
1579	  The symptom is that the kernel fails with an "unsupported
1580	  relocation" error when loading some modules.
1581
1582	  Until fixed tools are available, passing
1583	  -fno-optimize-sibling-calls to gcc should prevent gcc generating
1584	  code which hits this problem, at the cost of a bit of extra runtime
1585	  stack usage in some cases.
1586
1587	  The problem is described in more detail at:
1588	      https://bugs.launchpad.net/binutils-linaro/+bug/725126
1589
1590	  Only Thumb-2 kernels are affected.
1591
1592	  Unless you are sure your tools don't have this problem, say Y.
1593
1594config ARM_ASM_UNIFIED
1595	bool
1596
1597config AEABI
1598	bool "Use the ARM EABI to compile the kernel"
1599	help
1600	  This option allows for the kernel to be compiled using the latest
1601	  ARM ABI (aka EABI).  This is only useful if you are using a user
1602	  space environment that is also compiled with EABI.
1603
1604	  Since there are major incompatibilities between the legacy ABI and
1605	  EABI, especially with regard to structure member alignment, this
1606	  option also changes the kernel syscall calling convention to
1607	  disambiguate both ABIs and allow for backward compatibility support
1608	  (selected with CONFIG_OABI_COMPAT).
1609
1610	  To use this you need GCC version 4.0.0 or later.
1611
1612config OABI_COMPAT
1613	bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
1614	depends on AEABI && !THUMB2_KERNEL
1615	help
1616	  This option preserves the old syscall interface along with the
1617	  new (ARM EABI) one. It also provides a compatibility layer to
1618	  intercept syscalls that have structure arguments which layout
1619	  in memory differs between the legacy ABI and the new ARM EABI
1620	  (only for non "thumb" binaries). This option adds a tiny
1621	  overhead to all syscalls and produces a slightly larger kernel.
1622
1623	  The seccomp filter system will not be available when this is
1624	  selected, since there is no way yet to sensibly distinguish
1625	  between calling conventions during filtering.
1626
1627	  If you know you'll be using only pure EABI user space then you
1628	  can say N here. If this option is not selected and you attempt
1629	  to execute a legacy ABI binary then the result will be
1630	  UNPREDICTABLE (in fact it can be predicted that it won't work
1631	  at all). If in doubt say N.
1632
1633config ARCH_HAS_HOLES_MEMORYMODEL
1634	bool
1635
1636config ARCH_SPARSEMEM_ENABLE
1637	bool
1638
1639config ARCH_SPARSEMEM_DEFAULT
1640	def_bool ARCH_SPARSEMEM_ENABLE
1641
1642config ARCH_SELECT_MEMORY_MODEL
1643	def_bool ARCH_SPARSEMEM_ENABLE
1644
1645config HAVE_ARCH_PFN_VALID
1646	def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
1647
1648config HAVE_GENERIC_RCU_GUP
1649	def_bool y
1650	depends on ARM_LPAE
1651
1652config HIGHMEM
1653	bool "High Memory Support"
1654	depends on MMU
1655	help
1656	  The address space of ARM processors is only 4 Gigabytes large
1657	  and it has to accommodate user address space, kernel address
1658	  space as well as some memory mapped IO. That means that, if you
1659	  have a large amount of physical memory and/or IO, not all of the
1660	  memory can be "permanently mapped" by the kernel. The physical
1661	  memory that is not permanently mapped is called "high memory".
1662
1663	  Depending on the selected kernel/user memory split, minimum
1664	  vmalloc space and actual amount of RAM, you may not need this
1665	  option which should result in a slightly faster kernel.
1666
1667	  If unsure, say n.
1668
1669config HIGHPTE
1670	bool "Allocate 2nd-level pagetables from highmem" if EXPERT
1671	depends on HIGHMEM
1672	default y
1673	help
1674	  The VM uses one page of physical memory for each page table.
1675	  For systems with a lot of processes, this can use a lot of
1676	  precious low memory, eventually leading to low memory being
1677	  consumed by page tables.  Setting this option will allow
1678	  user-space 2nd level page tables to reside in high memory.
1679
1680config CPU_SW_DOMAIN_PAN
1681	bool "Enable use of CPU domains to implement privileged no-access"
1682	depends on MMU && !ARM_LPAE
1683	default y
1684	help
1685	  Increase kernel security by ensuring that normal kernel accesses
1686	  are unable to access userspace addresses.  This can help prevent
1687	  use-after-free bugs becoming an exploitable privilege escalation
1688	  by ensuring that magic values (such as LIST_POISON) will always
1689	  fault when dereferenced.
1690
1691	  CPUs with low-vector mappings use a best-efforts implementation.
1692	  Their lower 1MB needs to remain accessible for the vectors, but
1693	  the remainder of userspace will become appropriately inaccessible.
1694
1695config HW_PERF_EVENTS
1696	def_bool y
1697	depends on ARM_PMU
1698
1699config SYS_SUPPORTS_HUGETLBFS
1700       def_bool y
1701       depends on ARM_LPAE
1702
1703config HAVE_ARCH_TRANSPARENT_HUGEPAGE
1704       def_bool y
1705       depends on ARM_LPAE
1706
1707config ARCH_WANT_GENERAL_HUGETLB
1708	def_bool y
1709
1710config ARM_MODULE_PLTS
1711	bool "Use PLTs to allow module memory to spill over into vmalloc area"
1712	depends on MODULES
1713	help
1714	  Allocate PLTs when loading modules so that jumps and calls whose
1715	  targets are too far away for their relative offsets to be encoded
1716	  in the instructions themselves can be bounced via veneers in the
1717	  module's PLT. This allows modules to be allocated in the generic
1718	  vmalloc area after the dedicated module memory area has been
1719	  exhausted. The modules will use slightly more memory, but after
1720	  rounding up to page size, the actual memory footprint is usually
1721	  the same.
1722
1723	  Say y if you are getting out of memory errors while loading modules
1724
1725source "mm/Kconfig"
1726
1727config FORCE_MAX_ZONEORDER
1728	int "Maximum zone order"
1729	default "12" if SOC_AM33XX
1730	default "9" if SA1111 || ARCH_EFM32
1731	default "11"
1732	help
1733	  The kernel memory allocator divides physically contiguous memory
1734	  blocks into "zones", where each zone is a power of two number of
1735	  pages.  This option selects the largest power of two that the kernel
1736	  keeps in the memory allocator.  If you need to allocate very large
1737	  blocks of physically contiguous memory, then you may need to
1738	  increase this value.
1739
1740	  This config option is actually maximum order plus one. For example,
1741	  a value of 11 means that the largest free memory block is 2^10 pages.
1742
1743config ALIGNMENT_TRAP
1744	bool
1745	depends on CPU_CP15_MMU
1746	default y if !ARCH_EBSA110
1747	select HAVE_PROC_CPU if PROC_FS
1748	help
1749	  ARM processors cannot fetch/store information which is not
1750	  naturally aligned on the bus, i.e., a 4 byte fetch must start at an
1751	  address divisible by 4. On 32-bit ARM processors, these non-aligned
1752	  fetch/store instructions will be emulated in software if you say
1753	  here, which has a severe performance impact. This is necessary for
1754	  correct operation of some network protocols. With an IP-only
1755	  configuration it is safe to say N, otherwise say Y.
1756
1757config UACCESS_WITH_MEMCPY
1758	bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user()"
1759	depends on MMU
1760	default y if CPU_FEROCEON
1761	help
1762	  Implement faster copy_to_user and clear_user methods for CPU
1763	  cores where a 8-word STM instruction give significantly higher
1764	  memory write throughput than a sequence of individual 32bit stores.
1765
1766	  A possible side effect is a slight increase in scheduling latency
1767	  between threads sharing the same address space if they invoke
1768	  such copy operations with large buffers.
1769
1770	  However, if the CPU data cache is using a write-allocate mode,
1771	  this option is unlikely to provide any performance gain.
1772
1773config SECCOMP
1774	bool
1775	prompt "Enable seccomp to safely compute untrusted bytecode"
1776	---help---
1777	  This kernel feature is useful for number crunching applications
1778	  that may need to compute untrusted bytecode during their
1779	  execution. By using pipes or other transports made available to
1780	  the process as file descriptors supporting the read/write
1781	  syscalls, it's possible to isolate those applications in
1782	  their own address space using seccomp. Once seccomp is
1783	  enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
1784	  and the task is only allowed to execute a few safe syscalls
1785	  defined by each seccomp mode.
1786
1787config SWIOTLB
1788	def_bool y
1789
1790config IOMMU_HELPER
1791	def_bool SWIOTLB
1792
1793config XEN_DOM0
1794	def_bool y
1795	depends on XEN
1796
1797config XEN
1798	bool "Xen guest support on ARM"
1799	depends on ARM && AEABI && OF
1800	depends on CPU_V7 && !CPU_V6
1801	depends on !GENERIC_ATOMIC64
1802	depends on MMU
1803	select ARCH_DMA_ADDR_T_64BIT
1804	select ARM_PSCI
1805	select SWIOTLB_XEN
1806	help
1807	  Say Y if you want to run Linux in a Virtual Machine on Xen on ARM.
1808
1809endmenu
1810
1811menu "Boot options"
1812
1813config USE_OF
1814	bool "Flattened Device Tree support"
1815	select IRQ_DOMAIN
1816	select OF
1817	select OF_EARLY_FLATTREE
1818	select OF_RESERVED_MEM
1819	help
1820	  Include support for flattened device tree machine descriptions.
1821
1822config ATAGS
1823	bool "Support for the traditional ATAGS boot data passing" if USE_OF
1824	default y
1825	help
1826	  This is the traditional way of passing data to the kernel at boot
1827	  time. If you are solely relying on the flattened device tree (or
1828	  the ARM_ATAG_DTB_COMPAT option) then you may unselect this option
1829	  to remove ATAGS support from your kernel binary.  If unsure,
1830	  leave this to y.
1831
1832config DEPRECATED_PARAM_STRUCT
1833	bool "Provide old way to pass kernel parameters"
1834	depends on ATAGS
1835	help
1836	  This was deprecated in 2001 and announced to live on for 5 years.
1837	  Some old boot loaders still use this way.
1838
1839# Compressed boot loader in ROM.  Yes, we really want to ask about
1840# TEXT and BSS so we preserve their values in the config files.
1841config ZBOOT_ROM_TEXT
1842	hex "Compressed ROM boot loader base address"
1843	default "0"
1844	help
1845	  The physical address at which the ROM-able zImage is to be
1846	  placed in the target.  Platforms which normally make use of
1847	  ROM-able zImage formats normally set this to a suitable
1848	  value in their defconfig file.
1849
1850	  If ZBOOT_ROM is not enabled, this has no effect.
1851
1852config ZBOOT_ROM_BSS
1853	hex "Compressed ROM boot loader BSS address"
1854	default "0"
1855	help
1856	  The base address of an area of read/write memory in the target
1857	  for the ROM-able zImage which must be available while the
1858	  decompressor is running. It must be large enough to hold the
1859	  entire decompressed kernel plus an additional 128 KiB.
1860	  Platforms which normally make use of ROM-able zImage formats
1861	  normally set this to a suitable value in their defconfig file.
1862
1863	  If ZBOOT_ROM is not enabled, this has no effect.
1864
1865config ZBOOT_ROM
1866	bool "Compressed boot loader in ROM/flash"
1867	depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
1868	depends on !ARM_APPENDED_DTB && !XIP_KERNEL && !AUTO_ZRELADDR
1869	help
1870	  Say Y here if you intend to execute your compressed kernel image
1871	  (zImage) directly from ROM or flash.  If unsure, say N.
1872
1873config ARM_APPENDED_DTB
1874	bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
1875	depends on OF
1876	help
1877	  With this option, the boot code will look for a device tree binary
1878	  (DTB) appended to zImage
1879	  (e.g. cat zImage <filename>.dtb > zImage_w_dtb).
1880
1881	  This is meant as a backward compatibility convenience for those
1882	  systems with a bootloader that can't be upgraded to accommodate
1883	  the documented boot protocol using a device tree.
1884
1885	  Beware that there is very little in terms of protection against
1886	  this option being confused by leftover garbage in memory that might
1887	  look like a DTB header after a reboot if no actual DTB is appended
1888	  to zImage.  Do not leave this option active in a production kernel
1889	  if you don't intend to always append a DTB.  Proper passing of the
1890	  location into r2 of a bootloader provided DTB is always preferable
1891	  to this option.
1892
1893config ARM_ATAG_DTB_COMPAT
1894	bool "Supplement the appended DTB with traditional ATAG information"
1895	depends on ARM_APPENDED_DTB
1896	help
1897	  Some old bootloaders can't be updated to a DTB capable one, yet
1898	  they provide ATAGs with memory configuration, the ramdisk address,
1899	  the kernel cmdline string, etc.  Such information is dynamically
1900	  provided by the bootloader and can't always be stored in a static
1901	  DTB.  To allow a device tree enabled kernel to be used with such
1902	  bootloaders, this option allows zImage to extract the information
1903	  from the ATAG list and store it at run time into the appended DTB.
1904
1905choice
1906	prompt "Kernel command line type" if ARM_ATAG_DTB_COMPAT
1907	default ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
1908
1909config ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
1910	bool "Use bootloader kernel arguments if available"
1911	help
1912	  Uses the command-line options passed by the boot loader instead of
1913	  the device tree bootargs property. If the boot loader doesn't provide
1914	  any, the device tree bootargs property will be used.
1915
1916config ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEND
1917	bool "Extend with bootloader kernel arguments"
1918	help
1919	  The command-line arguments provided by the boot loader will be
1920	  appended to the the device tree bootargs property.
1921
1922endchoice
1923
1924config CMDLINE
1925	string "Default kernel command string"
1926	default ""
1927	help
1928	  On some architectures (EBSA110 and CATS), there is currently no way
1929	  for the boot loader to pass arguments to the kernel. For these
1930	  architectures, you should supply some command-line options at build
1931	  time by entering them here. As a minimum, you should specify the
1932	  memory size and the root device (e.g., mem=64M root=/dev/nfs).
1933
1934choice
1935	prompt "Kernel command line type" if CMDLINE != ""
1936	default CMDLINE_FROM_BOOTLOADER
1937	depends on ATAGS
1938
1939config CMDLINE_FROM_BOOTLOADER
1940	bool "Use bootloader kernel arguments if available"
1941	help
1942	  Uses the command-line options passed by the boot loader. If
1943	  the boot loader doesn't provide any, the default kernel command
1944	  string provided in CMDLINE will be used.
1945
1946config CMDLINE_EXTEND
1947	bool "Extend bootloader kernel arguments"
1948	help
1949	  The command-line arguments provided by the boot loader will be
1950	  appended to the default kernel command string.
1951
1952config CMDLINE_FORCE
1953	bool "Always use the default kernel command string"
1954	help
1955	  Always use the default kernel command string, even if the boot
1956	  loader passes other arguments to the kernel.
1957	  This is useful if you cannot or don't want to change the
1958	  command-line options your boot loader passes to the kernel.
1959endchoice
1960
1961config XIP_KERNEL
1962	bool "Kernel Execute-In-Place from ROM"
1963	depends on !ARM_LPAE && !ARCH_MULTIPLATFORM
1964	help
1965	  Execute-In-Place allows the kernel to run from non-volatile storage
1966	  directly addressable by the CPU, such as NOR flash. This saves RAM
1967	  space since the text section of the kernel is not loaded from flash
1968	  to RAM.  Read-write sections, such as the data section and stack,
1969	  are still copied to RAM.  The XIP kernel is not compressed since
1970	  it has to run directly from flash, so it will take more space to
1971	  store it.  The flash address used to link the kernel object files,
1972	  and for storing it, is configuration dependent. Therefore, if you
1973	  say Y here, you must know the proper physical address where to
1974	  store the kernel image depending on your own flash memory usage.
1975
1976	  Also note that the make target becomes "make xipImage" rather than
1977	  "make zImage" or "make Image".  The final kernel binary to put in
1978	  ROM memory will be arch/arm/boot/xipImage.
1979
1980	  If unsure, say N.
1981
1982config XIP_PHYS_ADDR
1983	hex "XIP Kernel Physical Location"
1984	depends on XIP_KERNEL
1985	default "0x00080000"
1986	help
1987	  This is the physical address in your flash memory the kernel will
1988	  be linked for and stored to.  This address is dependent on your
1989	  own flash usage.
1990
1991config KEXEC
1992	bool "Kexec system call (EXPERIMENTAL)"
1993	depends on (!SMP || PM_SLEEP_SMP)
1994	depends on !CPU_V7M
1995	select KEXEC_CORE
1996	help
1997	  kexec is a system call that implements the ability to shutdown your
1998	  current kernel, and to start another kernel.  It is like a reboot
1999	  but it is independent of the system firmware.   And like a reboot
2000	  you can start any kernel with it, not just Linux.
2001
2002	  It is an ongoing process to be certain the hardware in a machine
2003	  is properly shutdown, so do not be surprised if this code does not
2004	  initially work for you.
2005
2006config ATAGS_PROC
2007	bool "Export atags in procfs"
2008	depends on ATAGS && KEXEC
2009	default y
2010	help
2011	  Should the atags used to boot the kernel be exported in an "atags"
2012	  file in procfs. Useful with kexec.
2013
2014config CRASH_DUMP
2015	bool "Build kdump crash kernel (EXPERIMENTAL)"
2016	help
2017	  Generate crash dump after being started by kexec. This should
2018	  be normally only set in special crash dump kernels which are
2019	  loaded in the main kernel with kexec-tools into a specially
2020	  reserved region and then later executed after a crash by
2021	  kdump/kexec. The crash dump kernel must be compiled to a
2022	  memory address not used by the main kernel
2023
2024	  For more details see Documentation/kdump/kdump.txt
2025
2026config AUTO_ZRELADDR
2027	bool "Auto calculation of the decompressed kernel image address"
2028	help
2029	  ZRELADDR is the physical address where the decompressed kernel
2030	  image will be placed. If AUTO_ZRELADDR is selected, the address
2031	  will be determined at run-time by masking the current IP with
2032	  0xf8000000. This assumes the zImage being placed in the first 128MB
2033	  from start of memory.
2034
2035endmenu
2036
2037menu "CPU Power Management"
2038
2039source "drivers/cpufreq/Kconfig"
2040
2041source "drivers/cpuidle/Kconfig"
2042
2043endmenu
2044
2045menu "Floating point emulation"
2046
2047comment "At least one emulation must be selected"
2048
2049config FPE_NWFPE
2050	bool "NWFPE math emulation"
2051	depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
2052	---help---
2053	  Say Y to include the NWFPE floating point emulator in the kernel.
2054	  This is necessary to run most binaries. Linux does not currently
2055	  support floating point hardware so you need to say Y here even if
2056	  your machine has an FPA or floating point co-processor podule.
2057
2058	  You may say N here if you are going to load the Acorn FPEmulator
2059	  early in the bootup.
2060
2061config FPE_NWFPE_XP
2062	bool "Support extended precision"
2063	depends on FPE_NWFPE
2064	help
2065	  Say Y to include 80-bit support in the kernel floating-point
2066	  emulator.  Otherwise, only 32 and 64-bit support is compiled in.
2067	  Note that gcc does not generate 80-bit operations by default,
2068	  so in most cases this option only enlarges the size of the
2069	  floating point emulator without any good reason.
2070
2071	  You almost surely want to say N here.
2072
2073config FPE_FASTFPE
2074	bool "FastFPE math emulation (EXPERIMENTAL)"
2075	depends on (!AEABI || OABI_COMPAT) && !CPU_32v3
2076	---help---
2077	  Say Y here to include the FAST floating point emulator in the kernel.
2078	  This is an experimental much faster emulator which now also has full
2079	  precision for the mantissa.  It does not support any exceptions.
2080	  It is very simple, and approximately 3-6 times faster than NWFPE.
2081
2082	  It should be sufficient for most programs.  It may be not suitable
2083	  for scientific calculations, but you have to check this for yourself.
2084	  If you do not feel you need a faster FP emulation you should better
2085	  choose NWFPE.
2086
2087config VFP
2088	bool "VFP-format floating point maths"
2089	depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
2090	help
2091	  Say Y to include VFP support code in the kernel. This is needed
2092	  if your hardware includes a VFP unit.
2093
2094	  Please see <file:Documentation/arm/VFP/release-notes.txt> for
2095	  release notes and additional status information.
2096
2097	  Say N if your target does not have VFP hardware.
2098
2099config VFPv3
2100	bool
2101	depends on VFP
2102	default y if CPU_V7
2103
2104config NEON
2105	bool "Advanced SIMD (NEON) Extension support"
2106	depends on VFPv3 && CPU_V7
2107	help
2108	  Say Y to include support code for NEON, the ARMv7 Advanced SIMD
2109	  Extension.
2110
2111config KERNEL_MODE_NEON
2112	bool "Support for NEON in kernel mode"
2113	depends on NEON && AEABI
2114	help
2115	  Say Y to include support for NEON in kernel mode.
2116
2117endmenu
2118
2119menu "Userspace binary formats"
2120
2121source "fs/Kconfig.binfmt"
2122
2123endmenu
2124
2125menu "Power management options"
2126
2127source "kernel/power/Kconfig"
2128
2129config ARCH_SUSPEND_POSSIBLE
2130	depends on CPU_ARM920T || CPU_ARM926T || CPU_FEROCEON || CPU_SA1100 || \
2131		CPU_V6 || CPU_V6K || CPU_V7 || CPU_V7M || CPU_XSC3 || CPU_XSCALE || CPU_MOHAWK
2132	def_bool y
2133
2134config ARM_CPU_SUSPEND
2135	def_bool PM_SLEEP
2136
2137config ARCH_HIBERNATION_POSSIBLE
2138	bool
2139	depends on MMU
2140	default y if ARCH_SUSPEND_POSSIBLE
2141
2142endmenu
2143
2144source "net/Kconfig"
2145
2146source "drivers/Kconfig"
2147
2148source "drivers/firmware/Kconfig"
2149
2150source "fs/Kconfig"
2151
2152source "arch/arm/Kconfig.debug"
2153
2154source "security/Kconfig"
2155
2156source "crypto/Kconfig"
2157if CRYPTO
2158source "arch/arm/crypto/Kconfig"
2159endif
2160
2161source "lib/Kconfig"
2162
2163source "arch/arm/kvm/Kconfig"
2164