xref: /openbmc/linux/arch/arm/Kconfig (revision 3932b9ca)
1config ARM
2	bool
3	default y
4	select ARCH_BINFMT_ELF_RANDOMIZE_PIE
5	select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
6	select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
7	select ARCH_HAVE_CUSTOM_GPIO_H
8	select ARCH_MIGHT_HAVE_PC_PARPORT
9	select ARCH_SUPPORTS_ATOMIC_RMW
10	select ARCH_USE_BUILTIN_BSWAP
11	select ARCH_USE_CMPXCHG_LOCKREF
12	select ARCH_WANT_IPC_PARSE_VERSION
13	select BUILDTIME_EXTABLE_SORT if MMU
14	select CLONE_BACKWARDS
15	select CPU_PM if (SUSPEND || CPU_IDLE)
16	select DCACHE_WORD_ACCESS if HAVE_EFFICIENT_UNALIGNED_ACCESS
17	select GENERIC_ATOMIC64 if (CPU_V7M || CPU_V6 || !CPU_32v6K || !AEABI)
18	select GENERIC_CLOCKEVENTS_BROADCAST if SMP
19	select GENERIC_IDLE_POLL_SETUP
20	select GENERIC_IRQ_PROBE
21	select GENERIC_IRQ_SHOW
22	select GENERIC_PCI_IOMAP
23	select GENERIC_SCHED_CLOCK
24	select GENERIC_SMP_IDLE_THREAD
25	select GENERIC_STRNCPY_FROM_USER
26	select GENERIC_STRNLEN_USER
27	select HARDIRQS_SW_RESEND
28	select HAVE_ARCH_AUDITSYSCALL if (AEABI && !OABI_COMPAT)
29	select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL
30	select HAVE_ARCH_KGDB
31	select HAVE_ARCH_SECCOMP_FILTER if (AEABI && !OABI_COMPAT)
32	select HAVE_ARCH_TRACEHOOK
33	select HAVE_BPF_JIT
34	select HAVE_CC_STACKPROTECTOR
35	select HAVE_CONTEXT_TRACKING
36	select HAVE_C_RECORDMCOUNT
37	select HAVE_DEBUG_KMEMLEAK
38	select HAVE_DMA_API_DEBUG
39	select HAVE_DMA_ATTRS
40	select HAVE_DMA_CONTIGUOUS if MMU
41	select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL)
42	select HAVE_EFFICIENT_UNALIGNED_ACCESS if (CPU_V6 || CPU_V6K || CPU_V7) && MMU
43	select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
44	select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL)
45	select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
46	select HAVE_GENERIC_DMA_COHERENT
47	select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7))
48	select HAVE_IDE if PCI || ISA || PCMCIA
49	select HAVE_IRQ_TIME_ACCOUNTING
50	select HAVE_KERNEL_GZIP
51	select HAVE_KERNEL_LZ4
52	select HAVE_KERNEL_LZMA
53	select HAVE_KERNEL_LZO
54	select HAVE_KERNEL_XZ
55	select HAVE_KPROBES if !XIP_KERNEL
56	select HAVE_KRETPROBES if (HAVE_KPROBES)
57	select HAVE_MEMBLOCK
58	select HAVE_MOD_ARCH_SPECIFIC if ARM_UNWIND
59	select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
60	select HAVE_PERF_EVENTS
61	select HAVE_PERF_REGS
62	select HAVE_PERF_USER_STACK_DUMP
63	select HAVE_REGS_AND_STACK_ACCESS_API
64	select HAVE_SYSCALL_TRACEPOINTS
65	select HAVE_UID16
66	select HAVE_VIRT_CPU_ACCOUNTING_GEN
67	select IRQ_FORCED_THREADING
68	select MODULES_USE_ELF_REL
69	select NO_BOOTMEM
70	select OLD_SIGACTION
71	select OLD_SIGSUSPEND3
72	select PERF_USE_VMALLOC
73	select RTC_LIB
74	select SYS_SUPPORTS_APM_EMULATION
75	# Above selects are sorted alphabetically; please add new ones
76	# according to that.  Thanks.
77	help
78	  The ARM series is a line of low-power-consumption RISC chip designs
79	  licensed by ARM Ltd and targeted at embedded applications and
80	  handhelds such as the Compaq IPAQ.  ARM-based PCs are no longer
81	  manufactured, but legacy ARM-based PC hardware remains popular in
82	  Europe.  There is an ARM Linux project with a web page at
83	  <http://www.arm.linux.org.uk/>.
84
85config ARM_HAS_SG_CHAIN
86	select ARCH_HAS_SG_CHAIN
87	bool
88
89config NEED_SG_DMA_LENGTH
90	bool
91
92config ARM_DMA_USE_IOMMU
93	bool
94	select ARM_HAS_SG_CHAIN
95	select NEED_SG_DMA_LENGTH
96
97if ARM_DMA_USE_IOMMU
98
99config ARM_DMA_IOMMU_ALIGNMENT
100	int "Maximum PAGE_SIZE order of alignment for DMA IOMMU buffers"
101	range 4 9
102	default 8
103	help
104	  DMA mapping framework by default aligns all buffers to the smallest
105	  PAGE_SIZE order which is greater than or equal to the requested buffer
106	  size. This works well for buffers up to a few hundreds kilobytes, but
107	  for larger buffers it just a waste of address space. Drivers which has
108	  relatively small addressing window (like 64Mib) might run out of
109	  virtual space with just a few allocations.
110
111	  With this parameter you can specify the maximum PAGE_SIZE order for
112	  DMA IOMMU buffers. Larger buffers will be aligned only to this
113	  specified order. The order is expressed as a power of two multiplied
114	  by the PAGE_SIZE.
115
116endif
117
118config MIGHT_HAVE_PCI
119	bool
120
121config SYS_SUPPORTS_APM_EMULATION
122	bool
123
124config HAVE_TCM
125	bool
126	select GENERIC_ALLOCATOR
127
128config HAVE_PROC_CPU
129	bool
130
131config NO_IOPORT_MAP
132	bool
133
134config EISA
135	bool
136	---help---
137	  The Extended Industry Standard Architecture (EISA) bus was
138	  developed as an open alternative to the IBM MicroChannel bus.
139
140	  The EISA bus provided some of the features of the IBM MicroChannel
141	  bus while maintaining backward compatibility with cards made for
142	  the older ISA bus.  The EISA bus saw limited use between 1988 and
143	  1995 when it was made obsolete by the PCI bus.
144
145	  Say Y here if you are building a kernel for an EISA-based machine.
146
147	  Otherwise, say N.
148
149config SBUS
150	bool
151
152config STACKTRACE_SUPPORT
153	bool
154	default y
155
156config HAVE_LATENCYTOP_SUPPORT
157	bool
158	depends on !SMP
159	default y
160
161config LOCKDEP_SUPPORT
162	bool
163	default y
164
165config TRACE_IRQFLAGS_SUPPORT
166	bool
167	default y
168
169config RWSEM_XCHGADD_ALGORITHM
170	bool
171	default y
172
173config ARCH_HAS_ILOG2_U32
174	bool
175
176config ARCH_HAS_ILOG2_U64
177	bool
178
179config ARCH_HAS_BANDGAP
180	bool
181
182config GENERIC_HWEIGHT
183	bool
184	default y
185
186config GENERIC_CALIBRATE_DELAY
187	bool
188	default y
189
190config ARCH_MAY_HAVE_PC_FDC
191	bool
192
193config ZONE_DMA
194	bool
195
196config NEED_DMA_MAP_STATE
197       def_bool y
198
199config ARCH_SUPPORTS_UPROBES
200	def_bool y
201
202config ARCH_HAS_DMA_SET_COHERENT_MASK
203	bool
204
205config GENERIC_ISA_DMA
206	bool
207
208config FIQ
209	bool
210
211config NEED_RET_TO_USER
212	bool
213
214config ARCH_MTD_XIP
215	bool
216
217config VECTORS_BASE
218	hex
219	default 0xffff0000 if MMU || CPU_HIGH_VECTOR
220	default DRAM_BASE if REMAP_VECTORS_TO_RAM
221	default 0x00000000
222	help
223	  The base address of exception vectors.  This must be two pages
224	  in size.
225
226config ARM_PATCH_PHYS_VIRT
227	bool "Patch physical to virtual translations at runtime" if EMBEDDED
228	default y
229	depends on !XIP_KERNEL && MMU
230	depends on !ARCH_REALVIEW || !SPARSEMEM
231	help
232	  Patch phys-to-virt and virt-to-phys translation functions at
233	  boot and module load time according to the position of the
234	  kernel in system memory.
235
236	  This can only be used with non-XIP MMU kernels where the base
237	  of physical memory is at a 16MB boundary.
238
239	  Only disable this option if you know that you do not require
240	  this feature (eg, building a kernel for a single machine) and
241	  you need to shrink the kernel to the minimal size.
242
243config NEED_MACH_IO_H
244	bool
245	help
246	  Select this when mach/io.h is required to provide special
247	  definitions for this platform.  The need for mach/io.h should
248	  be avoided when possible.
249
250config NEED_MACH_MEMORY_H
251	bool
252	help
253	  Select this when mach/memory.h is required to provide special
254	  definitions for this platform.  The need for mach/memory.h should
255	  be avoided when possible.
256
257config PHYS_OFFSET
258	hex "Physical address of main memory" if MMU
259	depends on !ARM_PATCH_PHYS_VIRT
260	default DRAM_BASE if !MMU
261	default 0x00000000 if ARCH_EBSA110 || \
262			EP93XX_SDCE3_SYNC_PHYS_OFFSET || \
263			ARCH_FOOTBRIDGE || \
264			ARCH_INTEGRATOR || \
265			ARCH_IOP13XX || \
266			ARCH_KS8695 || \
267			(ARCH_REALVIEW && !REALVIEW_HIGH_PHYS_OFFSET)
268	default 0x10000000 if ARCH_OMAP1 || ARCH_RPC
269	default 0x20000000 if ARCH_S5PV210
270	default 0x70000000 if REALVIEW_HIGH_PHYS_OFFSET
271	default 0xc0000000 if EP93XX_SDCE0_PHYS_OFFSET || ARCH_SA1100
272	default 0xd0000000 if EP93XX_SDCE1_PHYS_OFFSET
273	default 0xe0000000 if EP93XX_SDCE2_PHYS_OFFSET
274	default 0xf0000000 if EP93XX_SDCE3_ASYNC_PHYS_OFFSET
275	help
276	  Please provide the physical address corresponding to the
277	  location of main memory in your system.
278
279config GENERIC_BUG
280	def_bool y
281	depends on BUG
282
283source "init/Kconfig"
284
285source "kernel/Kconfig.freezer"
286
287menu "System Type"
288
289config MMU
290	bool "MMU-based Paged Memory Management Support"
291	default y
292	help
293	  Select if you want MMU-based virtualised addressing space
294	  support by paged memory management. If unsure, say 'Y'.
295
296#
297# The "ARM system type" choice list is ordered alphabetically by option
298# text.  Please add new entries in the option alphabetic order.
299#
300choice
301	prompt "ARM system type"
302	default ARCH_VERSATILE if !MMU
303	default ARCH_MULTIPLATFORM if MMU
304
305config ARCH_MULTIPLATFORM
306	bool "Allow multiple platforms to be selected"
307	depends on MMU
308	select ARCH_WANT_OPTIONAL_GPIOLIB
309	select ARM_HAS_SG_CHAIN
310	select ARM_PATCH_PHYS_VIRT
311	select AUTO_ZRELADDR
312	select CLKSRC_OF
313	select COMMON_CLK
314	select GENERIC_CLOCKEVENTS
315	select MIGHT_HAVE_PCI
316	select MULTI_IRQ_HANDLER
317	select SPARSE_IRQ
318	select USE_OF
319
320config ARCH_INTEGRATOR
321	bool "ARM Ltd. Integrator family"
322	select ARM_AMBA
323	select ARM_PATCH_PHYS_VIRT if MMU
324	select AUTO_ZRELADDR
325	select COMMON_CLK
326	select COMMON_CLK_VERSATILE
327	select GENERIC_CLOCKEVENTS
328	select HAVE_TCM
329	select ICST
330	select MULTI_IRQ_HANDLER
331	select PLAT_VERSATILE
332	select SPARSE_IRQ
333	select USE_OF
334	select VERSATILE_FPGA_IRQ
335	help
336	  Support for ARM's Integrator platform.
337
338config ARCH_REALVIEW
339	bool "ARM Ltd. RealView family"
340	select ARCH_WANT_OPTIONAL_GPIOLIB
341	select ARM_AMBA
342	select ARM_TIMER_SP804
343	select COMMON_CLK
344	select COMMON_CLK_VERSATILE
345	select GENERIC_CLOCKEVENTS
346	select GPIO_PL061 if GPIOLIB
347	select ICST
348	select NEED_MACH_MEMORY_H
349	select PLAT_VERSATILE
350	help
351	  This enables support for ARM Ltd RealView boards.
352
353config ARCH_VERSATILE
354	bool "ARM Ltd. Versatile family"
355	select ARCH_WANT_OPTIONAL_GPIOLIB
356	select ARM_AMBA
357	select ARM_TIMER_SP804
358	select ARM_VIC
359	select CLKDEV_LOOKUP
360	select GENERIC_CLOCKEVENTS
361	select HAVE_MACH_CLKDEV
362	select ICST
363	select PLAT_VERSATILE
364	select PLAT_VERSATILE_CLOCK
365	select VERSATILE_FPGA_IRQ
366	help
367	  This enables support for ARM Ltd Versatile board.
368
369config ARCH_AT91
370	bool "Atmel AT91"
371	select ARCH_REQUIRE_GPIOLIB
372	select CLKDEV_LOOKUP
373	select IRQ_DOMAIN
374	select NEED_MACH_IO_H if PCCARD
375	select PINCTRL
376	select PINCTRL_AT91 if USE_OF
377	help
378	  This enables support for systems based on Atmel
379	  AT91RM9200 and AT91SAM9* processors.
380
381config ARCH_CLPS711X
382	bool "Cirrus Logic CLPS711x/EP721x/EP731x-based"
383	select ARCH_REQUIRE_GPIOLIB
384	select AUTO_ZRELADDR
385	select CLKSRC_MMIO
386	select COMMON_CLK
387	select CPU_ARM720T
388	select GENERIC_CLOCKEVENTS
389	select MFD_SYSCON
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_EFM32
417	bool "Energy Micro efm32"
418	depends on !MMU
419	select ARCH_REQUIRE_GPIOLIB
420	select ARM_NVIC
421	select AUTO_ZRELADDR
422	select CLKSRC_OF
423	select COMMON_CLK
424	select CPU_V7M
425	select GENERIC_CLOCKEVENTS
426	select NO_DMA
427	select NO_IOPORT_MAP
428	select SPARSE_IRQ
429	select USE_OF
430	help
431	  Support for Energy Micro's (now Silicon Labs) efm32 Giant Gecko
432	  processors.
433
434config ARCH_EP93XX
435	bool "EP93xx-based"
436	select ARCH_HAS_HOLES_MEMORYMODEL
437	select ARCH_REQUIRE_GPIOLIB
438	select ARCH_USES_GETTIMEOFFSET
439	select ARM_AMBA
440	select ARM_VIC
441	select CLKDEV_LOOKUP
442	select CPU_ARM920T
443	help
444	  This enables support for the Cirrus EP93xx series of CPUs.
445
446config ARCH_FOOTBRIDGE
447	bool "FootBridge"
448	select CPU_SA110
449	select FOOTBRIDGE
450	select GENERIC_CLOCKEVENTS
451	select HAVE_IDE
452	select NEED_MACH_IO_H if !MMU
453	select NEED_MACH_MEMORY_H
454	help
455	  Support for systems based on the DC21285 companion chip
456	  ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
457
458config ARCH_NETX
459	bool "Hilscher NetX based"
460	select ARM_VIC
461	select CLKSRC_MMIO
462	select CPU_ARM926T
463	select GENERIC_CLOCKEVENTS
464	help
465	  This enables support for systems based on the Hilscher NetX Soc
466
467config ARCH_IOP13XX
468	bool "IOP13xx-based"
469	depends on MMU
470	select CPU_XSC3
471	select NEED_MACH_MEMORY_H
472	select NEED_RET_TO_USER
473	select PCI
474	select PLAT_IOP
475	select VMSPLIT_1G
476	select SPARSE_IRQ
477	help
478	  Support for Intel's IOP13XX (XScale) family of processors.
479
480config ARCH_IOP32X
481	bool "IOP32x-based"
482	depends on MMU
483	select ARCH_REQUIRE_GPIOLIB
484	select CPU_XSCALE
485	select GPIO_IOP
486	select NEED_RET_TO_USER
487	select PCI
488	select PLAT_IOP
489	help
490	  Support for Intel's 80219 and IOP32X (XScale) family of
491	  processors.
492
493config ARCH_IOP33X
494	bool "IOP33x-based"
495	depends on MMU
496	select ARCH_REQUIRE_GPIOLIB
497	select CPU_XSCALE
498	select GPIO_IOP
499	select NEED_RET_TO_USER
500	select PCI
501	select PLAT_IOP
502	help
503	  Support for Intel's IOP33X (XScale) family of processors.
504
505config ARCH_IXP4XX
506	bool "IXP4xx-based"
507	depends on MMU
508	select ARCH_HAS_DMA_SET_COHERENT_MASK
509	select ARCH_REQUIRE_GPIOLIB
510	select ARCH_SUPPORTS_BIG_ENDIAN
511	select CLKSRC_MMIO
512	select CPU_XSCALE
513	select DMABOUNCE if PCI
514	select GENERIC_CLOCKEVENTS
515	select MIGHT_HAVE_PCI
516	select NEED_MACH_IO_H
517	select USB_EHCI_BIG_ENDIAN_DESC
518	select USB_EHCI_BIG_ENDIAN_MMIO
519	help
520	  Support for Intel's IXP4XX (XScale) family of processors.
521
522config ARCH_DOVE
523	bool "Marvell Dove"
524	select ARCH_REQUIRE_GPIOLIB
525	select CPU_PJ4
526	select GENERIC_CLOCKEVENTS
527	select MIGHT_HAVE_PCI
528	select MVEBU_MBUS
529	select PINCTRL
530	select PINCTRL_DOVE
531	select PLAT_ORION_LEGACY
532	help
533	  Support for the Marvell Dove SoC 88AP510
534
535config ARCH_MV78XX0
536	bool "Marvell MV78xx0"
537	select ARCH_REQUIRE_GPIOLIB
538	select CPU_FEROCEON
539	select GENERIC_CLOCKEVENTS
540	select MVEBU_MBUS
541	select PCI
542	select PLAT_ORION_LEGACY
543	help
544	  Support for the following Marvell MV78xx0 series SoCs:
545	  MV781x0, MV782x0.
546
547config ARCH_ORION5X
548	bool "Marvell Orion"
549	depends on MMU
550	select ARCH_REQUIRE_GPIOLIB
551	select CPU_FEROCEON
552	select GENERIC_CLOCKEVENTS
553	select MVEBU_MBUS
554	select PCI
555	select PLAT_ORION_LEGACY
556	help
557	  Support for the following Marvell Orion 5x series SoCs:
558	  Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
559	  Orion-2 (5281), Orion-1-90 (6183).
560
561config ARCH_MMP
562	bool "Marvell PXA168/910/MMP2"
563	depends on MMU
564	select ARCH_REQUIRE_GPIOLIB
565	select CLKDEV_LOOKUP
566	select GENERIC_ALLOCATOR
567	select GENERIC_CLOCKEVENTS
568	select GPIO_PXA
569	select IRQ_DOMAIN
570	select MULTI_IRQ_HANDLER
571	select PINCTRL
572	select PLAT_PXA
573	select SPARSE_IRQ
574	help
575	  Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
576
577config ARCH_KS8695
578	bool "Micrel/Kendin KS8695"
579	select ARCH_REQUIRE_GPIOLIB
580	select CLKSRC_MMIO
581	select CPU_ARM922T
582	select GENERIC_CLOCKEVENTS
583	select NEED_MACH_MEMORY_H
584	help
585	  Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
586	  System-on-Chip devices.
587
588config ARCH_W90X900
589	bool "Nuvoton W90X900 CPU"
590	select ARCH_REQUIRE_GPIOLIB
591	select CLKDEV_LOOKUP
592	select CLKSRC_MMIO
593	select CPU_ARM926T
594	select GENERIC_CLOCKEVENTS
595	help
596	  Support for Nuvoton (Winbond logic dept.) ARM9 processor,
597	  At present, the w90x900 has been renamed nuc900, regarding
598	  the ARM series product line, you can login the following
599	  link address to know more.
600
601	  <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
602		ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
603
604config ARCH_LPC32XX
605	bool "NXP LPC32XX"
606	select ARCH_REQUIRE_GPIOLIB
607	select ARM_AMBA
608	select CLKDEV_LOOKUP
609	select CLKSRC_MMIO
610	select CPU_ARM926T
611	select GENERIC_CLOCKEVENTS
612	select HAVE_IDE
613	select USE_OF
614	help
615	  Support for the NXP LPC32XX family of processors
616
617config ARCH_PXA
618	bool "PXA2xx/PXA3xx-based"
619	depends on MMU
620	select ARCH_MTD_XIP
621	select ARCH_REQUIRE_GPIOLIB
622	select ARM_CPU_SUSPEND if PM
623	select AUTO_ZRELADDR
624	select CLKDEV_LOOKUP
625	select CLKSRC_MMIO
626	select CLKSRC_OF
627	select GENERIC_CLOCKEVENTS
628	select GPIO_PXA
629	select HAVE_IDE
630	select MULTI_IRQ_HANDLER
631	select PLAT_PXA
632	select SPARSE_IRQ
633	help
634	  Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
635
636config ARCH_MSM
637	bool "Qualcomm MSM (non-multiplatform)"
638	select ARCH_REQUIRE_GPIOLIB
639	select COMMON_CLK
640	select GENERIC_CLOCKEVENTS
641	help
642	  Support for Qualcomm MSM/QSD based systems.  This runs on the
643	  apps processor of the MSM/QSD and depends on a shared memory
644	  interface to the modem processor which runs the baseband
645	  stack and controls some vital subsystems
646	  (clock and power control, etc).
647
648config ARCH_SHMOBILE_LEGACY
649	bool "Renesas ARM SoCs (non-multiplatform)"
650	select ARCH_SHMOBILE
651	select ARM_PATCH_PHYS_VIRT if MMU
652	select CLKDEV_LOOKUP
653	select GENERIC_CLOCKEVENTS
654	select HAVE_ARM_SCU if SMP
655	select HAVE_ARM_TWD if SMP
656	select HAVE_MACH_CLKDEV
657	select HAVE_SMP
658	select MIGHT_HAVE_CACHE_L2X0
659	select MULTI_IRQ_HANDLER
660	select NO_IOPORT_MAP
661	select PINCTRL
662	select PM_GENERIC_DOMAINS if PM
663	select SPARSE_IRQ
664	help
665	  Support for Renesas ARM SoC platforms using a non-multiplatform
666	  kernel. This includes the SH-Mobile, R-Mobile, EMMA-Mobile, R-Car
667	  and RZ families.
668
669config ARCH_RPC
670	bool "RiscPC"
671	select ARCH_ACORN
672	select ARCH_MAY_HAVE_PC_FDC
673	select ARCH_SPARSEMEM_ENABLE
674	select ARCH_USES_GETTIMEOFFSET
675	select CPU_SA110
676	select FIQ
677	select HAVE_IDE
678	select HAVE_PATA_PLATFORM
679	select ISA_DMA_API
680	select NEED_MACH_IO_H
681	select NEED_MACH_MEMORY_H
682	select NO_IOPORT_MAP
683	select VIRT_TO_BUS
684	help
685	  On the Acorn Risc-PC, Linux can support the internal IDE disk and
686	  CD-ROM interface, serial and parallel port, and the floppy drive.
687
688config ARCH_SA1100
689	bool "SA1100-based"
690	select ARCH_MTD_XIP
691	select ARCH_REQUIRE_GPIOLIB
692	select ARCH_SPARSEMEM_ENABLE
693	select CLKDEV_LOOKUP
694	select CLKSRC_MMIO
695	select CPU_FREQ
696	select CPU_SA1100
697	select GENERIC_CLOCKEVENTS
698	select HAVE_IDE
699	select ISA
700	select NEED_MACH_MEMORY_H
701	select SPARSE_IRQ
702	help
703	  Support for StrongARM 11x0 based boards.
704
705config ARCH_S3C24XX
706	bool "Samsung S3C24XX SoCs"
707	select ARCH_REQUIRE_GPIOLIB
708	select ATAGS
709	select CLKDEV_LOOKUP
710	select CLKSRC_SAMSUNG_PWM
711	select GENERIC_CLOCKEVENTS
712	select GPIO_SAMSUNG
713	select HAVE_S3C2410_I2C if I2C
714	select HAVE_S3C2410_WATCHDOG if WATCHDOG
715	select HAVE_S3C_RTC if RTC_CLASS
716	select MULTI_IRQ_HANDLER
717	select NEED_MACH_IO_H
718	select SAMSUNG_ATAGS
719	help
720	  Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443
721	  and S3C2450 SoCs based systems, such as the Simtec Electronics BAST
722	  (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or the
723	  Samsung SMDK2410 development board (and derivatives).
724
725config ARCH_S3C64XX
726	bool "Samsung S3C64XX"
727	select ARCH_REQUIRE_GPIOLIB
728	select ARM_AMBA
729	select ARM_VIC
730	select ATAGS
731	select CLKDEV_LOOKUP
732	select CLKSRC_SAMSUNG_PWM
733	select COMMON_CLK_SAMSUNG
734	select CPU_V6K
735	select GENERIC_CLOCKEVENTS
736	select GPIO_SAMSUNG
737	select HAVE_S3C2410_I2C if I2C
738	select HAVE_S3C2410_WATCHDOG if WATCHDOG
739	select HAVE_TCM
740	select NO_IOPORT_MAP
741	select PLAT_SAMSUNG
742	select PM_GENERIC_DOMAINS if PM
743	select S3C_DEV_NAND
744	select S3C_GPIO_TRACK
745	select SAMSUNG_ATAGS
746	select SAMSUNG_WAKEMASK
747	select SAMSUNG_WDT_RESET
748	help
749	  Samsung S3C64XX series based systems
750
751config ARCH_DAVINCI
752	bool "TI DaVinci"
753	select ARCH_HAS_HOLES_MEMORYMODEL
754	select ARCH_REQUIRE_GPIOLIB
755	select CLKDEV_LOOKUP
756	select GENERIC_ALLOCATOR
757	select GENERIC_CLOCKEVENTS
758	select GENERIC_IRQ_CHIP
759	select HAVE_IDE
760	select TI_PRIV_EDMA
761	select USE_OF
762	select ZONE_DMA
763	help
764	  Support for TI's DaVinci platform.
765
766config ARCH_OMAP1
767	bool "TI OMAP1"
768	depends on MMU
769	select ARCH_HAS_HOLES_MEMORYMODEL
770	select ARCH_OMAP
771	select ARCH_REQUIRE_GPIOLIB
772	select CLKDEV_LOOKUP
773	select CLKSRC_MMIO
774	select GENERIC_CLOCKEVENTS
775	select GENERIC_IRQ_CHIP
776	select HAVE_IDE
777	select IRQ_DOMAIN
778	select NEED_MACH_IO_H if PCCARD
779	select NEED_MACH_MEMORY_H
780	help
781	  Support for older TI OMAP1 (omap7xx, omap15xx or omap16xx)
782
783endchoice
784
785menu "Multiple platform selection"
786	depends on ARCH_MULTIPLATFORM
787
788comment "CPU Core family selection"
789
790config ARCH_MULTI_V4
791	bool "ARMv4 based platforms (FA526)"
792	depends on !ARCH_MULTI_V6_V7
793	select ARCH_MULTI_V4_V5
794	select CPU_FA526
795
796config ARCH_MULTI_V4T
797	bool "ARMv4T based platforms (ARM720T, ARM920T, ...)"
798	depends on !ARCH_MULTI_V6_V7
799	select ARCH_MULTI_V4_V5
800	select CPU_ARM920T if !(CPU_ARM7TDMI || CPU_ARM720T || \
801		CPU_ARM740T || CPU_ARM9TDMI || CPU_ARM922T || \
802		CPU_ARM925T || CPU_ARM940T)
803
804config ARCH_MULTI_V5
805	bool "ARMv5 based platforms (ARM926T, XSCALE, PJ1, ...)"
806	depends on !ARCH_MULTI_V6_V7
807	select ARCH_MULTI_V4_V5
808	select CPU_ARM926T if !(CPU_ARM946E || CPU_ARM1020 || \
809		CPU_ARM1020E || CPU_ARM1022 || CPU_ARM1026 || \
810		CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_FEROCEON)
811
812config ARCH_MULTI_V4_V5
813	bool
814
815config ARCH_MULTI_V6
816	bool "ARMv6 based platforms (ARM11)"
817	select ARCH_MULTI_V6_V7
818	select CPU_V6K
819
820config ARCH_MULTI_V7
821	bool "ARMv7 based platforms (Cortex-A, PJ4, Scorpion, Krait)"
822	default y
823	select ARCH_MULTI_V6_V7
824	select CPU_V7
825	select HAVE_SMP
826
827config ARCH_MULTI_V6_V7
828	bool
829	select MIGHT_HAVE_CACHE_L2X0
830
831config ARCH_MULTI_CPU_AUTO
832	def_bool !(ARCH_MULTI_V4 || ARCH_MULTI_V4T || ARCH_MULTI_V6_V7)
833	select ARCH_MULTI_V5
834
835endmenu
836
837config ARCH_VIRT
838	bool "Dummy Virtual Machine" if ARCH_MULTI_V7
839	select ARM_AMBA
840	select ARM_GIC
841	select ARM_PSCI
842	select HAVE_ARM_ARCH_TIMER
843
844#
845# This is sorted alphabetically by mach-* pathname.  However, plat-*
846# Kconfigs may be included either alphabetically (according to the
847# plat- suffix) or along side the corresponding mach-* source.
848#
849source "arch/arm/mach-mvebu/Kconfig"
850
851source "arch/arm/mach-at91/Kconfig"
852
853source "arch/arm/mach-axxia/Kconfig"
854
855source "arch/arm/mach-bcm/Kconfig"
856
857source "arch/arm/mach-berlin/Kconfig"
858
859source "arch/arm/mach-clps711x/Kconfig"
860
861source "arch/arm/mach-cns3xxx/Kconfig"
862
863source "arch/arm/mach-davinci/Kconfig"
864
865source "arch/arm/mach-dove/Kconfig"
866
867source "arch/arm/mach-ep93xx/Kconfig"
868
869source "arch/arm/mach-footbridge/Kconfig"
870
871source "arch/arm/mach-gemini/Kconfig"
872
873source "arch/arm/mach-highbank/Kconfig"
874
875source "arch/arm/mach-hisi/Kconfig"
876
877source "arch/arm/mach-integrator/Kconfig"
878
879source "arch/arm/mach-iop32x/Kconfig"
880
881source "arch/arm/mach-iop33x/Kconfig"
882
883source "arch/arm/mach-iop13xx/Kconfig"
884
885source "arch/arm/mach-ixp4xx/Kconfig"
886
887source "arch/arm/mach-keystone/Kconfig"
888
889source "arch/arm/mach-ks8695/Kconfig"
890
891source "arch/arm/mach-msm/Kconfig"
892
893source "arch/arm/mach-moxart/Kconfig"
894
895source "arch/arm/mach-mv78xx0/Kconfig"
896
897source "arch/arm/mach-imx/Kconfig"
898
899source "arch/arm/mach-mediatek/Kconfig"
900
901source "arch/arm/mach-mxs/Kconfig"
902
903source "arch/arm/mach-netx/Kconfig"
904
905source "arch/arm/mach-nomadik/Kconfig"
906
907source "arch/arm/mach-nspire/Kconfig"
908
909source "arch/arm/plat-omap/Kconfig"
910
911source "arch/arm/mach-omap1/Kconfig"
912
913source "arch/arm/mach-omap2/Kconfig"
914
915source "arch/arm/mach-orion5x/Kconfig"
916
917source "arch/arm/mach-picoxcell/Kconfig"
918
919source "arch/arm/mach-pxa/Kconfig"
920source "arch/arm/plat-pxa/Kconfig"
921
922source "arch/arm/mach-mmp/Kconfig"
923
924source "arch/arm/mach-qcom/Kconfig"
925
926source "arch/arm/mach-realview/Kconfig"
927
928source "arch/arm/mach-rockchip/Kconfig"
929
930source "arch/arm/mach-sa1100/Kconfig"
931
932source "arch/arm/mach-socfpga/Kconfig"
933
934source "arch/arm/mach-spear/Kconfig"
935
936source "arch/arm/mach-sti/Kconfig"
937
938source "arch/arm/mach-s3c24xx/Kconfig"
939
940source "arch/arm/mach-s3c64xx/Kconfig"
941
942source "arch/arm/mach-s5pv210/Kconfig"
943
944source "arch/arm/mach-exynos/Kconfig"
945source "arch/arm/plat-samsung/Kconfig"
946
947source "arch/arm/mach-shmobile/Kconfig"
948
949source "arch/arm/mach-sunxi/Kconfig"
950
951source "arch/arm/mach-prima2/Kconfig"
952
953source "arch/arm/mach-tegra/Kconfig"
954
955source "arch/arm/mach-u300/Kconfig"
956
957source "arch/arm/mach-ux500/Kconfig"
958
959source "arch/arm/mach-versatile/Kconfig"
960
961source "arch/arm/mach-vexpress/Kconfig"
962source "arch/arm/plat-versatile/Kconfig"
963
964source "arch/arm/mach-vt8500/Kconfig"
965
966source "arch/arm/mach-w90x900/Kconfig"
967
968source "arch/arm/mach-zynq/Kconfig"
969
970# Definitions to make life easier
971config ARCH_ACORN
972	bool
973
974config PLAT_IOP
975	bool
976	select GENERIC_CLOCKEVENTS
977
978config PLAT_ORION
979	bool
980	select CLKSRC_MMIO
981	select COMMON_CLK
982	select GENERIC_IRQ_CHIP
983	select IRQ_DOMAIN
984
985config PLAT_ORION_LEGACY
986	bool
987	select PLAT_ORION
988
989config PLAT_PXA
990	bool
991
992config PLAT_VERSATILE
993	bool
994
995config ARM_TIMER_SP804
996	bool
997	select CLKSRC_MMIO
998	select CLKSRC_OF if OF
999
1000source "arch/arm/firmware/Kconfig"
1001
1002source arch/arm/mm/Kconfig
1003
1004config IWMMXT
1005	bool "Enable iWMMXt support"
1006	depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4 || CPU_PJ4B
1007	default y if PXA27x || PXA3xx || ARCH_MMP || CPU_PJ4 || CPU_PJ4B
1008	help
1009	  Enable support for iWMMXt context switching at run time if
1010	  running on a CPU that supports it.
1011
1012config MULTI_IRQ_HANDLER
1013	bool
1014	help
1015	  Allow each machine to specify it's own IRQ handler at run time.
1016
1017if !MMU
1018source "arch/arm/Kconfig-nommu"
1019endif
1020
1021config PJ4B_ERRATA_4742
1022	bool "PJ4B Errata 4742: IDLE Wake Up Commands can Cause the CPU Core to Cease Operation"
1023	depends on CPU_PJ4B && MACH_ARMADA_370
1024	default y
1025	help
1026	  When coming out of either a Wait for Interrupt (WFI) or a Wait for
1027	  Event (WFE) IDLE states, a specific timing sensitivity exists between
1028	  the retiring WFI/WFE instructions and the newly issued subsequent
1029	  instructions.  This sensitivity can result in a CPU hang scenario.
1030	  Workaround:
1031	  The software must insert either a Data Synchronization Barrier (DSB)
1032	  or Data Memory Barrier (DMB) command immediately after the WFI/WFE
1033	  instruction
1034
1035config ARM_ERRATA_326103
1036	bool "ARM errata: FSR write bit incorrect on a SWP to read-only memory"
1037	depends on CPU_V6
1038	help
1039	  Executing a SWP instruction to read-only memory does not set bit 11
1040	  of the FSR on the ARM 1136 prior to r1p0. This causes the kernel to
1041	  treat the access as a read, preventing a COW from occurring and
1042	  causing the faulting task to livelock.
1043
1044config ARM_ERRATA_411920
1045	bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
1046	depends on CPU_V6 || CPU_V6K
1047	help
1048	  Invalidation of the Instruction Cache operation can
1049	  fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
1050	  It does not affect the MPCore. This option enables the ARM Ltd.
1051	  recommended workaround.
1052
1053config ARM_ERRATA_430973
1054	bool "ARM errata: Stale prediction on replaced interworking branch"
1055	depends on CPU_V7
1056	help
1057	  This option enables the workaround for the 430973 Cortex-A8
1058	  (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
1059	  interworking branch is replaced with another code sequence at the
1060	  same virtual address, whether due to self-modifying code or virtual
1061	  to physical address re-mapping, Cortex-A8 does not recover from the
1062	  stale interworking branch prediction. This results in Cortex-A8
1063	  executing the new code sequence in the incorrect ARM or Thumb state.
1064	  The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
1065	  and also flushes the branch target cache at every context switch.
1066	  Note that setting specific bits in the ACTLR register may not be
1067	  available in non-secure mode.
1068
1069config ARM_ERRATA_458693
1070	bool "ARM errata: Processor deadlock when a false hazard is created"
1071	depends on CPU_V7
1072	depends on !ARCH_MULTIPLATFORM
1073	help
1074	  This option enables the workaround for the 458693 Cortex-A8 (r2p0)
1075	  erratum. For very specific sequences of memory operations, it is
1076	  possible for a hazard condition intended for a cache line to instead
1077	  be incorrectly associated with a different cache line. This false
1078	  hazard might then cause a processor deadlock. The workaround enables
1079	  the L1 caching of the NEON accesses and disables the PLD instruction
1080	  in the ACTLR register. Note that setting specific bits in the ACTLR
1081	  register may not be available in non-secure mode.
1082
1083config ARM_ERRATA_460075
1084	bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
1085	depends on CPU_V7
1086	depends on !ARCH_MULTIPLATFORM
1087	help
1088	  This option enables the workaround for the 460075 Cortex-A8 (r2p0)
1089	  erratum. Any asynchronous access to the L2 cache may encounter a
1090	  situation in which recent store transactions to the L2 cache are lost
1091	  and overwritten with stale memory contents from external memory. The
1092	  workaround disables the write-allocate mode for the L2 cache via the
1093	  ACTLR register. Note that setting specific bits in the ACTLR register
1094	  may not be available in non-secure mode.
1095
1096config ARM_ERRATA_742230
1097	bool "ARM errata: DMB operation may be faulty"
1098	depends on CPU_V7 && SMP
1099	depends on !ARCH_MULTIPLATFORM
1100	help
1101	  This option enables the workaround for the 742230 Cortex-A9
1102	  (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
1103	  between two write operations may not ensure the correct visibility
1104	  ordering of the two writes. This workaround sets a specific bit in
1105	  the diagnostic register of the Cortex-A9 which causes the DMB
1106	  instruction to behave as a DSB, ensuring the correct behaviour of
1107	  the two writes.
1108
1109config ARM_ERRATA_742231
1110	bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
1111	depends on CPU_V7 && SMP
1112	depends on !ARCH_MULTIPLATFORM
1113	help
1114	  This option enables the workaround for the 742231 Cortex-A9
1115	  (r2p0..r2p2) erratum. Under certain conditions, specific to the
1116	  Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
1117	  accessing some data located in the same cache line, may get corrupted
1118	  data due to bad handling of the address hazard when the line gets
1119	  replaced from one of the CPUs at the same time as another CPU is
1120	  accessing it. This workaround sets specific bits in the diagnostic
1121	  register of the Cortex-A9 which reduces the linefill issuing
1122	  capabilities of the processor.
1123
1124config ARM_ERRATA_643719
1125	bool "ARM errata: LoUIS bit field in CLIDR register is incorrect"
1126	depends on CPU_V7 && SMP
1127	help
1128	  This option enables the workaround for the 643719 Cortex-A9 (prior to
1129	  r1p0) erratum. On affected cores the LoUIS bit field of the CLIDR
1130	  register returns zero when it should return one. The workaround
1131	  corrects this value, ensuring cache maintenance operations which use
1132	  it behave as intended and avoiding data corruption.
1133
1134config ARM_ERRATA_720789
1135	bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
1136	depends on CPU_V7
1137	help
1138	  This option enables the workaround for the 720789 Cortex-A9 (prior to
1139	  r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
1140	  broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
1141	  As a consequence of this erratum, some TLB entries which should be
1142	  invalidated are not, resulting in an incoherency in the system page
1143	  tables. The workaround changes the TLB flushing routines to invalidate
1144	  entries regardless of the ASID.
1145
1146config ARM_ERRATA_743622
1147	bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
1148	depends on CPU_V7
1149	depends on !ARCH_MULTIPLATFORM
1150	help
1151	  This option enables the workaround for the 743622 Cortex-A9
1152	  (r2p*) erratum. Under very rare conditions, a faulty
1153	  optimisation in the Cortex-A9 Store Buffer may lead to data
1154	  corruption. This workaround sets a specific bit in the diagnostic
1155	  register of the Cortex-A9 which disables the Store Buffer
1156	  optimisation, preventing the defect from occurring. This has no
1157	  visible impact on the overall performance or power consumption of the
1158	  processor.
1159
1160config ARM_ERRATA_751472
1161	bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
1162	depends on CPU_V7
1163	depends on !ARCH_MULTIPLATFORM
1164	help
1165	  This option enables the workaround for the 751472 Cortex-A9 (prior
1166	  to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
1167	  completion of a following broadcasted operation if the second
1168	  operation is received by a CPU before the ICIALLUIS has completed,
1169	  potentially leading to corrupted entries in the cache or TLB.
1170
1171config ARM_ERRATA_754322
1172	bool "ARM errata: possible faulty MMU translations following an ASID switch"
1173	depends on CPU_V7
1174	help
1175	  This option enables the workaround for the 754322 Cortex-A9 (r2p*,
1176	  r3p*) erratum. A speculative memory access may cause a page table walk
1177	  which starts prior to an ASID switch but completes afterwards. This
1178	  can populate the micro-TLB with a stale entry which may be hit with
1179	  the new ASID. This workaround places two dsb instructions in the mm
1180	  switching code so that no page table walks can cross the ASID switch.
1181
1182config ARM_ERRATA_754327
1183	bool "ARM errata: no automatic Store Buffer drain"
1184	depends on CPU_V7 && SMP
1185	help
1186	  This option enables the workaround for the 754327 Cortex-A9 (prior to
1187	  r2p0) erratum. The Store Buffer does not have any automatic draining
1188	  mechanism and therefore a livelock may occur if an external agent
1189	  continuously polls a memory location waiting to observe an update.
1190	  This workaround defines cpu_relax() as smp_mb(), preventing correctly
1191	  written polling loops from denying visibility of updates to memory.
1192
1193config ARM_ERRATA_364296
1194	bool "ARM errata: Possible cache data corruption with hit-under-miss enabled"
1195	depends on CPU_V6
1196	help
1197	  This options enables the workaround for the 364296 ARM1136
1198	  r0p2 erratum (possible cache data corruption with
1199	  hit-under-miss enabled). It sets the undocumented bit 31 in
1200	  the auxiliary control register and the FI bit in the control
1201	  register, thus disabling hit-under-miss without putting the
1202	  processor into full low interrupt latency mode. ARM11MPCore
1203	  is not affected.
1204
1205config ARM_ERRATA_764369
1206	bool "ARM errata: Data cache line maintenance operation by MVA may not succeed"
1207	depends on CPU_V7 && SMP
1208	help
1209	  This option enables the workaround for erratum 764369
1210	  affecting Cortex-A9 MPCore with two or more processors (all
1211	  current revisions). Under certain timing circumstances, a data
1212	  cache line maintenance operation by MVA targeting an Inner
1213	  Shareable memory region may fail to proceed up to either the
1214	  Point of Coherency or to the Point of Unification of the
1215	  system. This workaround adds a DSB instruction before the
1216	  relevant cache maintenance functions and sets a specific bit
1217	  in the diagnostic control register of the SCU.
1218
1219config ARM_ERRATA_775420
1220       bool "ARM errata: A data cache maintenance operation which aborts, might lead to deadlock"
1221       depends on CPU_V7
1222       help
1223	 This option enables the workaround for the 775420 Cortex-A9 (r2p2,
1224	 r2p6,r2p8,r2p10,r3p0) erratum. In case a date cache maintenance
1225	 operation aborts with MMU exception, it might cause the processor
1226	 to deadlock. This workaround puts DSB before executing ISB if
1227	 an abort may occur on cache maintenance.
1228
1229config ARM_ERRATA_798181
1230	bool "ARM errata: TLBI/DSB failure on Cortex-A15"
1231	depends on CPU_V7 && SMP
1232	help
1233	  On Cortex-A15 (r0p0..r3p2) the TLBI*IS/DSB operations are not
1234	  adequately shooting down all use of the old entries. This
1235	  option enables the Linux kernel workaround for this erratum
1236	  which sends an IPI to the CPUs that are running the same ASID
1237	  as the one being invalidated.
1238
1239config ARM_ERRATA_773022
1240	bool "ARM errata: incorrect instructions may be executed from loop buffer"
1241	depends on CPU_V7
1242	help
1243	  This option enables the workaround for the 773022 Cortex-A15
1244	  (up to r0p4) erratum. In certain rare sequences of code, the
1245	  loop buffer may deliver incorrect instructions. This
1246	  workaround disables the loop buffer to avoid the erratum.
1247
1248endmenu
1249
1250source "arch/arm/common/Kconfig"
1251
1252menu "Bus support"
1253
1254config ARM_AMBA
1255	bool
1256
1257config ISA
1258	bool
1259	help
1260	  Find out whether you have ISA slots on your motherboard.  ISA is the
1261	  name of a bus system, i.e. the way the CPU talks to the other stuff
1262	  inside your box.  Other bus systems are PCI, EISA, MicroChannel
1263	  (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
1264	  newer boards don't support it.  If you have ISA, say Y, otherwise N.
1265
1266# Select ISA DMA controller support
1267config ISA_DMA
1268	bool
1269	select ISA_DMA_API
1270
1271# Select ISA DMA interface
1272config ISA_DMA_API
1273	bool
1274
1275config PCI
1276	bool "PCI support" if MIGHT_HAVE_PCI
1277	help
1278	  Find out whether you have a PCI motherboard. PCI is the name of a
1279	  bus system, i.e. the way the CPU talks to the other stuff inside
1280	  your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
1281	  VESA. If you have PCI, say Y, otherwise N.
1282
1283config PCI_DOMAINS
1284	bool
1285	depends on PCI
1286
1287config PCI_NANOENGINE
1288	bool "BSE nanoEngine PCI support"
1289	depends on SA1100_NANOENGINE
1290	help
1291	  Enable PCI on the BSE nanoEngine board.
1292
1293config PCI_SYSCALL
1294	def_bool PCI
1295
1296config PCI_HOST_ITE8152
1297	bool
1298	depends on PCI && MACH_ARMCORE
1299	default y
1300	select DMABOUNCE
1301
1302source "drivers/pci/Kconfig"
1303source "drivers/pci/pcie/Kconfig"
1304
1305source "drivers/pcmcia/Kconfig"
1306
1307endmenu
1308
1309menu "Kernel Features"
1310
1311config HAVE_SMP
1312	bool
1313	help
1314	  This option should be selected by machines which have an SMP-
1315	  capable CPU.
1316
1317	  The only effect of this option is to make the SMP-related
1318	  options available to the user for configuration.
1319
1320config SMP
1321	bool "Symmetric Multi-Processing"
1322	depends on CPU_V6K || CPU_V7
1323	depends on GENERIC_CLOCKEVENTS
1324	depends on HAVE_SMP
1325	depends on MMU || ARM_MPU
1326	help
1327	  This enables support for systems with more than one CPU. If you have
1328	  a system with only one CPU, say N. If you have a system with more
1329	  than one CPU, say Y.
1330
1331	  If you say N here, the kernel will run on uni- and multiprocessor
1332	  machines, but will use only one CPU of a multiprocessor machine. If
1333	  you say Y here, the kernel will run on many, but not all,
1334	  uniprocessor machines. On a uniprocessor machine, the kernel
1335	  will run faster if you say N here.
1336
1337	  See also <file:Documentation/x86/i386/IO-APIC.txt>,
1338	  <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
1339	  <http://tldp.org/HOWTO/SMP-HOWTO.html>.
1340
1341	  If you don't know what to do here, say N.
1342
1343config SMP_ON_UP
1344	bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
1345	depends on SMP && !XIP_KERNEL && MMU
1346	default y
1347	help
1348	  SMP kernels contain instructions which fail on non-SMP processors.
1349	  Enabling this option allows the kernel to modify itself to make
1350	  these instructions safe.  Disabling it allows about 1K of space
1351	  savings.
1352
1353	  If you don't know what to do here, say Y.
1354
1355config ARM_CPU_TOPOLOGY
1356	bool "Support cpu topology definition"
1357	depends on SMP && CPU_V7
1358	default y
1359	help
1360	  Support ARM cpu topology definition. The MPIDR register defines
1361	  affinity between processors which is then used to describe the cpu
1362	  topology of an ARM System.
1363
1364config SCHED_MC
1365	bool "Multi-core scheduler support"
1366	depends on ARM_CPU_TOPOLOGY
1367	help
1368	  Multi-core scheduler support improves the CPU scheduler's decision
1369	  making when dealing with multi-core CPU chips at a cost of slightly
1370	  increased overhead in some places. If unsure say N here.
1371
1372config SCHED_SMT
1373	bool "SMT scheduler support"
1374	depends on ARM_CPU_TOPOLOGY
1375	help
1376	  Improves the CPU scheduler's decision making when dealing with
1377	  MultiThreading at a cost of slightly increased overhead in some
1378	  places. If unsure say N here.
1379
1380config HAVE_ARM_SCU
1381	bool
1382	help
1383	  This option enables support for the ARM system coherency unit
1384
1385config HAVE_ARM_ARCH_TIMER
1386	bool "Architected timer support"
1387	depends on CPU_V7
1388	select ARM_ARCH_TIMER
1389	select GENERIC_CLOCKEVENTS
1390	help
1391	  This option enables support for the ARM architected timer
1392
1393config HAVE_ARM_TWD
1394	bool
1395	depends on SMP
1396	select CLKSRC_OF if OF
1397	help
1398	  This options enables support for the ARM timer and watchdog unit
1399
1400config MCPM
1401	bool "Multi-Cluster Power Management"
1402	depends on CPU_V7 && SMP
1403	help
1404	  This option provides the common power management infrastructure
1405	  for (multi-)cluster based systems, such as big.LITTLE based
1406	  systems.
1407
1408config BIG_LITTLE
1409	bool "big.LITTLE support (Experimental)"
1410	depends on CPU_V7 && SMP
1411	select MCPM
1412	help
1413	  This option enables support selections for the big.LITTLE
1414	  system architecture.
1415
1416config BL_SWITCHER
1417	bool "big.LITTLE switcher support"
1418	depends on BIG_LITTLE && MCPM && HOTPLUG_CPU
1419	select ARM_CPU_SUSPEND
1420	select CPU_PM
1421	help
1422	  The big.LITTLE "switcher" provides the core functionality to
1423	  transparently handle transition between a cluster of A15's
1424	  and a cluster of A7's in a big.LITTLE system.
1425
1426config BL_SWITCHER_DUMMY_IF
1427	tristate "Simple big.LITTLE switcher user interface"
1428	depends on BL_SWITCHER && DEBUG_KERNEL
1429	help
1430	  This is a simple and dummy char dev interface to control
1431	  the big.LITTLE switcher core code.  It is meant for
1432	  debugging purposes only.
1433
1434choice
1435	prompt "Memory split"
1436	depends on MMU
1437	default VMSPLIT_3G
1438	help
1439	  Select the desired split between kernel and user memory.
1440
1441	  If you are not absolutely sure what you are doing, leave this
1442	  option alone!
1443
1444	config VMSPLIT_3G
1445		bool "3G/1G user/kernel split"
1446	config VMSPLIT_2G
1447		bool "2G/2G user/kernel split"
1448	config VMSPLIT_1G
1449		bool "1G/3G user/kernel split"
1450endchoice
1451
1452config PAGE_OFFSET
1453	hex
1454	default PHYS_OFFSET if !MMU
1455	default 0x40000000 if VMSPLIT_1G
1456	default 0x80000000 if VMSPLIT_2G
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	help
1476	  Say Y here if you want Linux to communicate with system firmware
1477	  implementing the PSCI specification for CPU-centric power
1478	  management operations described in ARM document number ARM DEN
1479	  0022A ("Power State Coordination Interface System Software on
1480	  ARM processors").
1481
1482# The GPIO number here must be sorted by descending number. In case of
1483# a multiplatform kernel, we just want the highest value required by the
1484# selected platforms.
1485config ARCH_NR_GPIO
1486	int
1487	default 1024 if ARCH_SHMOBILE || ARCH_TEGRA
1488	default 512 if ARCH_EXYNOS || ARCH_KEYSTONE || SOC_OMAP5 || \
1489		SOC_DRA7XX || ARCH_S3C24XX || ARCH_S3C64XX || ARCH_S5PV210
1490	default 416 if ARCH_SUNXI
1491	default 392 if ARCH_U8500
1492	default 352 if ARCH_VT8500
1493	default 288 if ARCH_ROCKCHIP
1494	default 264 if MACH_H4700
1495	default 0
1496	help
1497	  Maximum number of GPIOs in the system.
1498
1499	  If unsure, leave the default value.
1500
1501source kernel/Kconfig.preempt
1502
1503config HZ_FIXED
1504	int
1505	default 200 if ARCH_EBSA110 || ARCH_S3C24XX || \
1506		ARCH_S5PV210 || ARCH_EXYNOS4
1507	default AT91_TIMER_HZ if ARCH_AT91
1508	default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE_LEGACY
1509	default 0
1510
1511choice
1512	depends on HZ_FIXED = 0
1513	prompt "Timer frequency"
1514
1515config HZ_100
1516	bool "100 Hz"
1517
1518config HZ_200
1519	bool "200 Hz"
1520
1521config HZ_250
1522	bool "250 Hz"
1523
1524config HZ_300
1525	bool "300 Hz"
1526
1527config HZ_500
1528	bool "500 Hz"
1529
1530config HZ_1000
1531	bool "1000 Hz"
1532
1533endchoice
1534
1535config HZ
1536	int
1537	default HZ_FIXED if HZ_FIXED != 0
1538	default 100 if HZ_100
1539	default 200 if HZ_200
1540	default 250 if HZ_250
1541	default 300 if HZ_300
1542	default 500 if HZ_500
1543	default 1000
1544
1545config SCHED_HRTICK
1546	def_bool HIGH_RES_TIMERS
1547
1548config THUMB2_KERNEL
1549	bool "Compile the kernel in Thumb-2 mode" if !CPU_THUMBONLY
1550	depends on (CPU_V7 || CPU_V7M) && !CPU_V6 && !CPU_V6K
1551	default y if CPU_THUMBONLY
1552	select AEABI
1553	select ARM_ASM_UNIFIED
1554	select ARM_UNWIND
1555	help
1556	  By enabling this option, the kernel will be compiled in
1557	  Thumb-2 mode. A compiler/assembler that understand the unified
1558	  ARM-Thumb syntax is needed.
1559
1560	  If unsure, say N.
1561
1562config THUMB2_AVOID_R_ARM_THM_JUMP11
1563	bool "Work around buggy Thumb-2 short branch relocations in gas"
1564	depends on THUMB2_KERNEL && MODULES
1565	default y
1566	help
1567	  Various binutils versions can resolve Thumb-2 branches to
1568	  locally-defined, preemptible global symbols as short-range "b.n"
1569	  branch instructions.
1570
1571	  This is a problem, because there's no guarantee the final
1572	  destination of the symbol, or any candidate locations for a
1573	  trampoline, are within range of the branch.  For this reason, the
1574	  kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
1575	  relocation in modules at all, and it makes little sense to add
1576	  support.
1577
1578	  The symptom is that the kernel fails with an "unsupported
1579	  relocation" error when loading some modules.
1580
1581	  Until fixed tools are available, passing
1582	  -fno-optimize-sibling-calls to gcc should prevent gcc generating
1583	  code which hits this problem, at the cost of a bit of extra runtime
1584	  stack usage in some cases.
1585
1586	  The problem is described in more detail at:
1587	      https://bugs.launchpad.net/binutils-linaro/+bug/725126
1588
1589	  Only Thumb-2 kernels are affected.
1590
1591	  Unless you are sure your tools don't have this problem, say Y.
1592
1593config ARM_ASM_UNIFIED
1594	bool
1595
1596config AEABI
1597	bool "Use the ARM EABI to compile the kernel"
1598	help
1599	  This option allows for the kernel to be compiled using the latest
1600	  ARM ABI (aka EABI).  This is only useful if you are using a user
1601	  space environment that is also compiled with EABI.
1602
1603	  Since there are major incompatibilities between the legacy ABI and
1604	  EABI, especially with regard to structure member alignment, this
1605	  option also changes the kernel syscall calling convention to
1606	  disambiguate both ABIs and allow for backward compatibility support
1607	  (selected with CONFIG_OABI_COMPAT).
1608
1609	  To use this you need GCC version 4.0.0 or later.
1610
1611config OABI_COMPAT
1612	bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
1613	depends on AEABI && !THUMB2_KERNEL
1614	help
1615	  This option preserves the old syscall interface along with the
1616	  new (ARM EABI) one. It also provides a compatibility layer to
1617	  intercept syscalls that have structure arguments which layout
1618	  in memory differs between the legacy ABI and the new ARM EABI
1619	  (only for non "thumb" binaries). This option adds a tiny
1620	  overhead to all syscalls and produces a slightly larger kernel.
1621
1622	  The seccomp filter system will not be available when this is
1623	  selected, since there is no way yet to sensibly distinguish
1624	  between calling conventions during filtering.
1625
1626	  If you know you'll be using only pure EABI user space then you
1627	  can say N here. If this option is not selected and you attempt
1628	  to execute a legacy ABI binary then the result will be
1629	  UNPREDICTABLE (in fact it can be predicted that it won't work
1630	  at all). If in doubt say N.
1631
1632config ARCH_HAS_HOLES_MEMORYMODEL
1633	bool
1634
1635config ARCH_SPARSEMEM_ENABLE
1636	bool
1637
1638config ARCH_SPARSEMEM_DEFAULT
1639	def_bool ARCH_SPARSEMEM_ENABLE
1640
1641config ARCH_SELECT_MEMORY_MODEL
1642	def_bool ARCH_SPARSEMEM_ENABLE
1643
1644config HAVE_ARCH_PFN_VALID
1645	def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
1646
1647config HIGHMEM
1648	bool "High Memory Support"
1649	depends on MMU
1650	help
1651	  The address space of ARM processors is only 4 Gigabytes large
1652	  and it has to accommodate user address space, kernel address
1653	  space as well as some memory mapped IO. That means that, if you
1654	  have a large amount of physical memory and/or IO, not all of the
1655	  memory can be "permanently mapped" by the kernel. The physical
1656	  memory that is not permanently mapped is called "high memory".
1657
1658	  Depending on the selected kernel/user memory split, minimum
1659	  vmalloc space and actual amount of RAM, you may not need this
1660	  option which should result in a slightly faster kernel.
1661
1662	  If unsure, say n.
1663
1664config HIGHPTE
1665	bool "Allocate 2nd-level pagetables from highmem"
1666	depends on HIGHMEM
1667
1668config HW_PERF_EVENTS
1669	bool "Enable hardware performance counter support for perf events"
1670	depends on PERF_EVENTS
1671	default y
1672	help
1673	  Enable hardware performance counter support for perf events. If
1674	  disabled, perf events will use software events only.
1675
1676config SYS_SUPPORTS_HUGETLBFS
1677       def_bool y
1678       depends on ARM_LPAE
1679
1680config HAVE_ARCH_TRANSPARENT_HUGEPAGE
1681       def_bool y
1682       depends on ARM_LPAE
1683
1684config ARCH_WANT_GENERAL_HUGETLB
1685	def_bool y
1686
1687source "mm/Kconfig"
1688
1689config FORCE_MAX_ZONEORDER
1690	int "Maximum zone order" if ARCH_SHMOBILE_LEGACY
1691	range 11 64 if ARCH_SHMOBILE_LEGACY
1692	default "12" if SOC_AM33XX
1693	default "9" if SA1111 || ARCH_EFM32
1694	default "11"
1695	help
1696	  The kernel memory allocator divides physically contiguous memory
1697	  blocks into "zones", where each zone is a power of two number of
1698	  pages.  This option selects the largest power of two that the kernel
1699	  keeps in the memory allocator.  If you need to allocate very large
1700	  blocks of physically contiguous memory, then you may need to
1701	  increase this value.
1702
1703	  This config option is actually maximum order plus one. For example,
1704	  a value of 11 means that the largest free memory block is 2^10 pages.
1705
1706config ALIGNMENT_TRAP
1707	bool
1708	depends on CPU_CP15_MMU
1709	default y if !ARCH_EBSA110
1710	select HAVE_PROC_CPU if PROC_FS
1711	help
1712	  ARM processors cannot fetch/store information which is not
1713	  naturally aligned on the bus, i.e., a 4 byte fetch must start at an
1714	  address divisible by 4. On 32-bit ARM processors, these non-aligned
1715	  fetch/store instructions will be emulated in software if you say
1716	  here, which has a severe performance impact. This is necessary for
1717	  correct operation of some network protocols. With an IP-only
1718	  configuration it is safe to say N, otherwise say Y.
1719
1720config UACCESS_WITH_MEMCPY
1721	bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user()"
1722	depends on MMU
1723	default y if CPU_FEROCEON
1724	help
1725	  Implement faster copy_to_user and clear_user methods for CPU
1726	  cores where a 8-word STM instruction give significantly higher
1727	  memory write throughput than a sequence of individual 32bit stores.
1728
1729	  A possible side effect is a slight increase in scheduling latency
1730	  between threads sharing the same address space if they invoke
1731	  such copy operations with large buffers.
1732
1733	  However, if the CPU data cache is using a write-allocate mode,
1734	  this option is unlikely to provide any performance gain.
1735
1736config SECCOMP
1737	bool
1738	prompt "Enable seccomp to safely compute untrusted bytecode"
1739	---help---
1740	  This kernel feature is useful for number crunching applications
1741	  that may need to compute untrusted bytecode during their
1742	  execution. By using pipes or other transports made available to
1743	  the process as file descriptors supporting the read/write
1744	  syscalls, it's possible to isolate those applications in
1745	  their own address space using seccomp. Once seccomp is
1746	  enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
1747	  and the task is only allowed to execute a few safe syscalls
1748	  defined by each seccomp mode.
1749
1750config SWIOTLB
1751	def_bool y
1752
1753config IOMMU_HELPER
1754	def_bool SWIOTLB
1755
1756config XEN_DOM0
1757	def_bool y
1758	depends on XEN
1759
1760config XEN
1761	bool "Xen guest support on ARM (EXPERIMENTAL)"
1762	depends on ARM && AEABI && OF
1763	depends on CPU_V7 && !CPU_V6
1764	depends on !GENERIC_ATOMIC64
1765	depends on MMU
1766	select ARCH_DMA_ADDR_T_64BIT
1767	select ARM_PSCI
1768	select SWIOTLB_XEN
1769	help
1770	  Say Y if you want to run Linux in a Virtual Machine on Xen on ARM.
1771
1772endmenu
1773
1774menu "Boot options"
1775
1776config USE_OF
1777	bool "Flattened Device Tree support"
1778	select IRQ_DOMAIN
1779	select OF
1780	select OF_EARLY_FLATTREE
1781	select OF_RESERVED_MEM
1782	help
1783	  Include support for flattened device tree machine descriptions.
1784
1785config ATAGS
1786	bool "Support for the traditional ATAGS boot data passing" if USE_OF
1787	default y
1788	help
1789	  This is the traditional way of passing data to the kernel at boot
1790	  time. If you are solely relying on the flattened device tree (or
1791	  the ARM_ATAG_DTB_COMPAT option) then you may unselect this option
1792	  to remove ATAGS support from your kernel binary.  If unsure,
1793	  leave this to y.
1794
1795config DEPRECATED_PARAM_STRUCT
1796	bool "Provide old way to pass kernel parameters"
1797	depends on ATAGS
1798	help
1799	  This was deprecated in 2001 and announced to live on for 5 years.
1800	  Some old boot loaders still use this way.
1801
1802# Compressed boot loader in ROM.  Yes, we really want to ask about
1803# TEXT and BSS so we preserve their values in the config files.
1804config ZBOOT_ROM_TEXT
1805	hex "Compressed ROM boot loader base address"
1806	default "0"
1807	help
1808	  The physical address at which the ROM-able zImage is to be
1809	  placed in the target.  Platforms which normally make use of
1810	  ROM-able zImage formats normally set this to a suitable
1811	  value in their defconfig file.
1812
1813	  If ZBOOT_ROM is not enabled, this has no effect.
1814
1815config ZBOOT_ROM_BSS
1816	hex "Compressed ROM boot loader BSS address"
1817	default "0"
1818	help
1819	  The base address of an area of read/write memory in the target
1820	  for the ROM-able zImage which must be available while the
1821	  decompressor is running. It must be large enough to hold the
1822	  entire decompressed kernel plus an additional 128 KiB.
1823	  Platforms which normally make use of ROM-able zImage formats
1824	  normally set this to a suitable value in their defconfig file.
1825
1826	  If ZBOOT_ROM is not enabled, this has no effect.
1827
1828config ZBOOT_ROM
1829	bool "Compressed boot loader in ROM/flash"
1830	depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
1831	depends on !ARM_APPENDED_DTB && !XIP_KERNEL && !AUTO_ZRELADDR
1832	help
1833	  Say Y here if you intend to execute your compressed kernel image
1834	  (zImage) directly from ROM or flash.  If unsure, say N.
1835
1836choice
1837	prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)"
1838	depends on ZBOOT_ROM && ARCH_SH7372
1839	default ZBOOT_ROM_NONE
1840	help
1841	  Include experimental SD/MMC loading code in the ROM-able zImage.
1842	  With this enabled it is possible to write the ROM-able zImage
1843	  kernel image to an MMC or SD card and boot the kernel straight
1844	  from the reset vector. At reset the processor Mask ROM will load
1845	  the first part of the ROM-able zImage which in turn loads the
1846	  rest the kernel image to RAM.
1847
1848config ZBOOT_ROM_NONE
1849	bool "No SD/MMC loader in zImage (EXPERIMENTAL)"
1850	help
1851	  Do not load image from SD or MMC
1852
1853config ZBOOT_ROM_MMCIF
1854	bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
1855	help
1856	  Load image from MMCIF hardware block.
1857
1858config ZBOOT_ROM_SH_MOBILE_SDHI
1859	bool "Include SuperH Mobile SDHI loader in zImage (EXPERIMENTAL)"
1860	help
1861	  Load image from SDHI hardware block
1862
1863endchoice
1864
1865config ARM_APPENDED_DTB
1866	bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
1867	depends on OF
1868	help
1869	  With this option, the boot code will look for a device tree binary
1870	  (DTB) appended to zImage
1871	  (e.g. cat zImage <filename>.dtb > zImage_w_dtb).
1872
1873	  This is meant as a backward compatibility convenience for those
1874	  systems with a bootloader that can't be upgraded to accommodate
1875	  the documented boot protocol using a device tree.
1876
1877	  Beware that there is very little in terms of protection against
1878	  this option being confused by leftover garbage in memory that might
1879	  look like a DTB header after a reboot if no actual DTB is appended
1880	  to zImage.  Do not leave this option active in a production kernel
1881	  if you don't intend to always append a DTB.  Proper passing of the
1882	  location into r2 of a bootloader provided DTB is always preferable
1883	  to this option.
1884
1885config ARM_ATAG_DTB_COMPAT
1886	bool "Supplement the appended DTB with traditional ATAG information"
1887	depends on ARM_APPENDED_DTB
1888	help
1889	  Some old bootloaders can't be updated to a DTB capable one, yet
1890	  they provide ATAGs with memory configuration, the ramdisk address,
1891	  the kernel cmdline string, etc.  Such information is dynamically
1892	  provided by the bootloader and can't always be stored in a static
1893	  DTB.  To allow a device tree enabled kernel to be used with such
1894	  bootloaders, this option allows zImage to extract the information
1895	  from the ATAG list and store it at run time into the appended DTB.
1896
1897choice
1898	prompt "Kernel command line type" if ARM_ATAG_DTB_COMPAT
1899	default ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
1900
1901config ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
1902	bool "Use bootloader kernel arguments if available"
1903	help
1904	  Uses the command-line options passed by the boot loader instead of
1905	  the device tree bootargs property. If the boot loader doesn't provide
1906	  any, the device tree bootargs property will be used.
1907
1908config ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEND
1909	bool "Extend with bootloader kernel arguments"
1910	help
1911	  The command-line arguments provided by the boot loader will be
1912	  appended to the the device tree bootargs property.
1913
1914endchoice
1915
1916config CMDLINE
1917	string "Default kernel command string"
1918	default ""
1919	help
1920	  On some architectures (EBSA110 and CATS), there is currently no way
1921	  for the boot loader to pass arguments to the kernel. For these
1922	  architectures, you should supply some command-line options at build
1923	  time by entering them here. As a minimum, you should specify the
1924	  memory size and the root device (e.g., mem=64M root=/dev/nfs).
1925
1926choice
1927	prompt "Kernel command line type" if CMDLINE != ""
1928	default CMDLINE_FROM_BOOTLOADER
1929	depends on ATAGS
1930
1931config CMDLINE_FROM_BOOTLOADER
1932	bool "Use bootloader kernel arguments if available"
1933	help
1934	  Uses the command-line options passed by the boot loader. If
1935	  the boot loader doesn't provide any, the default kernel command
1936	  string provided in CMDLINE will be used.
1937
1938config CMDLINE_EXTEND
1939	bool "Extend bootloader kernel arguments"
1940	help
1941	  The command-line arguments provided by the boot loader will be
1942	  appended to the default kernel command string.
1943
1944config CMDLINE_FORCE
1945	bool "Always use the default kernel command string"
1946	help
1947	  Always use the default kernel command string, even if the boot
1948	  loader passes other arguments to the kernel.
1949	  This is useful if you cannot or don't want to change the
1950	  command-line options your boot loader passes to the kernel.
1951endchoice
1952
1953config XIP_KERNEL
1954	bool "Kernel Execute-In-Place from ROM"
1955	depends on !ARM_LPAE && !ARCH_MULTIPLATFORM
1956	help
1957	  Execute-In-Place allows the kernel to run from non-volatile storage
1958	  directly addressable by the CPU, such as NOR flash. This saves RAM
1959	  space since the text section of the kernel is not loaded from flash
1960	  to RAM.  Read-write sections, such as the data section and stack,
1961	  are still copied to RAM.  The XIP kernel is not compressed since
1962	  it has to run directly from flash, so it will take more space to
1963	  store it.  The flash address used to link the kernel object files,
1964	  and for storing it, is configuration dependent. Therefore, if you
1965	  say Y here, you must know the proper physical address where to
1966	  store the kernel image depending on your own flash memory usage.
1967
1968	  Also note that the make target becomes "make xipImage" rather than
1969	  "make zImage" or "make Image".  The final kernel binary to put in
1970	  ROM memory will be arch/arm/boot/xipImage.
1971
1972	  If unsure, say N.
1973
1974config XIP_PHYS_ADDR
1975	hex "XIP Kernel Physical Location"
1976	depends on XIP_KERNEL
1977	default "0x00080000"
1978	help
1979	  This is the physical address in your flash memory the kernel will
1980	  be linked for and stored to.  This address is dependent on your
1981	  own flash usage.
1982
1983config KEXEC
1984	bool "Kexec system call (EXPERIMENTAL)"
1985	depends on (!SMP || PM_SLEEP_SMP)
1986	help
1987	  kexec is a system call that implements the ability to shutdown your
1988	  current kernel, and to start another kernel.  It is like a reboot
1989	  but it is independent of the system firmware.   And like a reboot
1990	  you can start any kernel with it, not just Linux.
1991
1992	  It is an ongoing process to be certain the hardware in a machine
1993	  is properly shutdown, so do not be surprised if this code does not
1994	  initially work for you.
1995
1996config ATAGS_PROC
1997	bool "Export atags in procfs"
1998	depends on ATAGS && KEXEC
1999	default y
2000	help
2001	  Should the atags used to boot the kernel be exported in an "atags"
2002	  file in procfs. Useful with kexec.
2003
2004config CRASH_DUMP
2005	bool "Build kdump crash kernel (EXPERIMENTAL)"
2006	help
2007	  Generate crash dump after being started by kexec. This should
2008	  be normally only set in special crash dump kernels which are
2009	  loaded in the main kernel with kexec-tools into a specially
2010	  reserved region and then later executed after a crash by
2011	  kdump/kexec. The crash dump kernel must be compiled to a
2012	  memory address not used by the main kernel
2013
2014	  For more details see Documentation/kdump/kdump.txt
2015
2016config AUTO_ZRELADDR
2017	bool "Auto calculation of the decompressed kernel image address"
2018	help
2019	  ZRELADDR is the physical address where the decompressed kernel
2020	  image will be placed. If AUTO_ZRELADDR is selected, the address
2021	  will be determined at run-time by masking the current IP with
2022	  0xf8000000. This assumes the zImage being placed in the first 128MB
2023	  from start of memory.
2024
2025endmenu
2026
2027menu "CPU Power Management"
2028
2029source "drivers/cpufreq/Kconfig"
2030
2031source "drivers/cpuidle/Kconfig"
2032
2033endmenu
2034
2035menu "Floating point emulation"
2036
2037comment "At least one emulation must be selected"
2038
2039config FPE_NWFPE
2040	bool "NWFPE math emulation"
2041	depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
2042	---help---
2043	  Say Y to include the NWFPE floating point emulator in the kernel.
2044	  This is necessary to run most binaries. Linux does not currently
2045	  support floating point hardware so you need to say Y here even if
2046	  your machine has an FPA or floating point co-processor podule.
2047
2048	  You may say N here if you are going to load the Acorn FPEmulator
2049	  early in the bootup.
2050
2051config FPE_NWFPE_XP
2052	bool "Support extended precision"
2053	depends on FPE_NWFPE
2054	help
2055	  Say Y to include 80-bit support in the kernel floating-point
2056	  emulator.  Otherwise, only 32 and 64-bit support is compiled in.
2057	  Note that gcc does not generate 80-bit operations by default,
2058	  so in most cases this option only enlarges the size of the
2059	  floating point emulator without any good reason.
2060
2061	  You almost surely want to say N here.
2062
2063config FPE_FASTFPE
2064	bool "FastFPE math emulation (EXPERIMENTAL)"
2065	depends on (!AEABI || OABI_COMPAT) && !CPU_32v3
2066	---help---
2067	  Say Y here to include the FAST floating point emulator in the kernel.
2068	  This is an experimental much faster emulator which now also has full
2069	  precision for the mantissa.  It does not support any exceptions.
2070	  It is very simple, and approximately 3-6 times faster than NWFPE.
2071
2072	  It should be sufficient for most programs.  It may be not suitable
2073	  for scientific calculations, but you have to check this for yourself.
2074	  If you do not feel you need a faster FP emulation you should better
2075	  choose NWFPE.
2076
2077config VFP
2078	bool "VFP-format floating point maths"
2079	depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
2080	help
2081	  Say Y to include VFP support code in the kernel. This is needed
2082	  if your hardware includes a VFP unit.
2083
2084	  Please see <file:Documentation/arm/VFP/release-notes.txt> for
2085	  release notes and additional status information.
2086
2087	  Say N if your target does not have VFP hardware.
2088
2089config VFPv3
2090	bool
2091	depends on VFP
2092	default y if CPU_V7
2093
2094config NEON
2095	bool "Advanced SIMD (NEON) Extension support"
2096	depends on VFPv3 && CPU_V7
2097	help
2098	  Say Y to include support code for NEON, the ARMv7 Advanced SIMD
2099	  Extension.
2100
2101config KERNEL_MODE_NEON
2102	bool "Support for NEON in kernel mode"
2103	depends on NEON && AEABI
2104	help
2105	  Say Y to include support for NEON in kernel mode.
2106
2107endmenu
2108
2109menu "Userspace binary formats"
2110
2111source "fs/Kconfig.binfmt"
2112
2113config ARTHUR
2114	tristate "RISC OS personality"
2115	depends on !AEABI
2116	help
2117	  Say Y here to include the kernel code necessary if you want to run
2118	  Acorn RISC OS/Arthur binaries under Linux. This code is still very
2119	  experimental; if this sounds frightening, say N and sleep in peace.
2120	  You can also say M here to compile this support as a module (which
2121	  will be called arthur).
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 "fs/Kconfig"
2149
2150source "arch/arm/Kconfig.debug"
2151
2152source "security/Kconfig"
2153
2154source "crypto/Kconfig"
2155
2156source "lib/Kconfig"
2157
2158source "arch/arm/kvm/Kconfig"
2159