xref: /linux/arch/arm/Kconfig (revision 0dc016dbd820260b8ea74337980735b8c88d4ef2)
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_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 GENERIC_ALLOCATOR
19	select GENERIC_ATOMIC64 if (CPU_V7M || CPU_V6 || !CPU_32v6K || !AEABI)
20	select GENERIC_CLOCKEVENTS_BROADCAST if SMP
21	select GENERIC_IDLE_POLL_SETUP
22	select GENERIC_IRQ_PROBE
23	select GENERIC_IRQ_SHOW
24	select GENERIC_PCI_IOMAP
25	select GENERIC_SCHED_CLOCK
26	select GENERIC_SMP_IDLE_THREAD
27	select GENERIC_STRNCPY_FROM_USER
28	select GENERIC_STRNLEN_USER
29	select HANDLE_DOMAIN_IRQ
30	select HARDIRQS_SW_RESEND
31	select HAVE_ARCH_AUDITSYSCALL if (AEABI && !OABI_COMPAT)
32	select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL
33	select HAVE_ARCH_KGDB
34	select HAVE_ARCH_SECCOMP_FILTER if (AEABI && !OABI_COMPAT)
35	select HAVE_ARCH_TRACEHOOK
36	select HAVE_BPF_JIT
37	select HAVE_CC_STACKPROTECTOR
38	select HAVE_CONTEXT_TRACKING
39	select HAVE_C_RECORDMCOUNT
40	select HAVE_DEBUG_KMEMLEAK
41	select HAVE_DMA_API_DEBUG
42	select HAVE_DMA_ATTRS
43	select HAVE_DMA_CONTIGUOUS if MMU
44	select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL)
45	select HAVE_EFFICIENT_UNALIGNED_ACCESS if (CPU_V6 || CPU_V6K || CPU_V7) && MMU
46	select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
47	select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL)
48	select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
49	select HAVE_GENERIC_DMA_COHERENT
50	select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7))
51	select HAVE_IDE if PCI || ISA || PCMCIA
52	select HAVE_IRQ_TIME_ACCOUNTING
53	select HAVE_KERNEL_GZIP
54	select HAVE_KERNEL_LZ4
55	select HAVE_KERNEL_LZMA
56	select HAVE_KERNEL_LZO
57	select HAVE_KERNEL_XZ
58	select HAVE_KPROBES if !XIP_KERNEL
59	select HAVE_KRETPROBES if (HAVE_KPROBES)
60	select HAVE_MEMBLOCK
61	select HAVE_MOD_ARCH_SPECIFIC if ARM_UNWIND
62	select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
63	select HAVE_OPTPROBES if !THUMB2_KERNEL
64	select HAVE_PERF_EVENTS
65	select HAVE_PERF_REGS
66	select HAVE_PERF_USER_STACK_DUMP
67	select HAVE_RCU_TABLE_FREE if (SMP && ARM_LPAE)
68	select HAVE_REGS_AND_STACK_ACCESS_API
69	select HAVE_SYSCALL_TRACEPOINTS
70	select HAVE_UID16
71	select HAVE_VIRT_CPU_ACCOUNTING_GEN
72	select IRQ_FORCED_THREADING
73	select MODULES_USE_ELF_REL
74	select NO_BOOTMEM
75	select OLD_SIGACTION
76	select OLD_SIGSUSPEND3
77	select PERF_USE_VMALLOC
78	select RTC_LIB
79	select SYS_SUPPORTS_APM_EMULATION
80	# Above selects are sorted alphabetically; please add new ones
81	# according to that.  Thanks.
82	help
83	  The ARM series is a line of low-power-consumption RISC chip designs
84	  licensed by ARM Ltd and targeted at embedded applications and
85	  handhelds such as the Compaq IPAQ.  ARM-based PCs are no longer
86	  manufactured, but legacy ARM-based PC hardware remains popular in
87	  Europe.  There is an ARM Linux project with a web page at
88	  <http://www.arm.linux.org.uk/>.
89
90config ARM_HAS_SG_CHAIN
91	select ARCH_HAS_SG_CHAIN
92	bool
93
94config NEED_SG_DMA_LENGTH
95	bool
96
97config ARM_DMA_USE_IOMMU
98	bool
99	select ARM_HAS_SG_CHAIN
100	select NEED_SG_DMA_LENGTH
101
102if ARM_DMA_USE_IOMMU
103
104config ARM_DMA_IOMMU_ALIGNMENT
105	int "Maximum PAGE_SIZE order of alignment for DMA IOMMU buffers"
106	range 4 9
107	default 8
108	help
109	  DMA mapping framework by default aligns all buffers to the smallest
110	  PAGE_SIZE order which is greater than or equal to the requested buffer
111	  size. This works well for buffers up to a few hundreds kilobytes, but
112	  for larger buffers it just a waste of address space. Drivers which has
113	  relatively small addressing window (like 64Mib) might run out of
114	  virtual space with just a few allocations.
115
116	  With this parameter you can specify the maximum PAGE_SIZE order for
117	  DMA IOMMU buffers. Larger buffers will be aligned only to this
118	  specified order. The order is expressed as a power of two multiplied
119	  by the PAGE_SIZE.
120
121endif
122
123config MIGHT_HAVE_PCI
124	bool
125
126config SYS_SUPPORTS_APM_EMULATION
127	bool
128
129config HAVE_TCM
130	bool
131	select GENERIC_ALLOCATOR
132
133config HAVE_PROC_CPU
134	bool
135
136config NO_IOPORT_MAP
137	bool
138
139config EISA
140	bool
141	---help---
142	  The Extended Industry Standard Architecture (EISA) bus was
143	  developed as an open alternative to the IBM MicroChannel bus.
144
145	  The EISA bus provided some of the features of the IBM MicroChannel
146	  bus while maintaining backward compatibility with cards made for
147	  the older ISA bus.  The EISA bus saw limited use between 1988 and
148	  1995 when it was made obsolete by the PCI bus.
149
150	  Say Y here if you are building a kernel for an EISA-based machine.
151
152	  Otherwise, say N.
153
154config SBUS
155	bool
156
157config STACKTRACE_SUPPORT
158	bool
159	default y
160
161config HAVE_LATENCYTOP_SUPPORT
162	bool
163	depends on !SMP
164	default y
165
166config LOCKDEP_SUPPORT
167	bool
168	default y
169
170config TRACE_IRQFLAGS_SUPPORT
171	bool
172	default y
173
174config RWSEM_XCHGADD_ALGORITHM
175	bool
176	default y
177
178config ARCH_HAS_ILOG2_U32
179	bool
180
181config ARCH_HAS_ILOG2_U64
182	bool
183
184config ARCH_HAS_BANDGAP
185	bool
186
187config GENERIC_HWEIGHT
188	bool
189	default y
190
191config GENERIC_CALIBRATE_DELAY
192	bool
193	default y
194
195config ARCH_MAY_HAVE_PC_FDC
196	bool
197
198config ZONE_DMA
199	bool
200
201config NEED_DMA_MAP_STATE
202       def_bool y
203
204config ARCH_SUPPORTS_UPROBES
205	def_bool y
206
207config ARCH_HAS_DMA_SET_COHERENT_MASK
208	bool
209
210config GENERIC_ISA_DMA
211	bool
212
213config FIQ
214	bool
215
216config NEED_RET_TO_USER
217	bool
218
219config ARCH_MTD_XIP
220	bool
221
222config VECTORS_BASE
223	hex
224	default 0xffff0000 if MMU || CPU_HIGH_VECTOR
225	default DRAM_BASE if REMAP_VECTORS_TO_RAM
226	default 0x00000000
227	help
228	  The base address of exception vectors.  This must be two pages
229	  in size.
230
231config ARM_PATCH_PHYS_VIRT
232	bool "Patch physical to virtual translations at runtime" if EMBEDDED
233	default y
234	depends on !XIP_KERNEL && MMU
235	depends on !ARCH_REALVIEW || !SPARSEMEM
236	help
237	  Patch phys-to-virt and virt-to-phys translation functions at
238	  boot and module load time according to the position of the
239	  kernel in system memory.
240
241	  This can only be used with non-XIP MMU kernels where the base
242	  of physical memory is at a 16MB boundary.
243
244	  Only disable this option if you know that you do not require
245	  this feature (eg, building a kernel for a single machine) and
246	  you need to shrink the kernel to the minimal size.
247
248config NEED_MACH_IO_H
249	bool
250	help
251	  Select this when mach/io.h is required to provide special
252	  definitions for this platform.  The need for mach/io.h should
253	  be avoided when possible.
254
255config NEED_MACH_MEMORY_H
256	bool
257	help
258	  Select this when mach/memory.h is required to provide special
259	  definitions for this platform.  The need for mach/memory.h should
260	  be avoided when possible.
261
262config PHYS_OFFSET
263	hex "Physical address of main memory" if MMU
264	depends on !ARM_PATCH_PHYS_VIRT
265	default DRAM_BASE if !MMU
266	default 0x00000000 if ARCH_EBSA110 || \
267			EP93XX_SDCE3_SYNC_PHYS_OFFSET || \
268			ARCH_FOOTBRIDGE || \
269			ARCH_INTEGRATOR || \
270			ARCH_IOP13XX || \
271			ARCH_KS8695 || \
272			(ARCH_REALVIEW && !REALVIEW_HIGH_PHYS_OFFSET)
273	default 0x10000000 if ARCH_OMAP1 || ARCH_RPC
274	default 0x20000000 if ARCH_S5PV210
275	default 0x70000000 if REALVIEW_HIGH_PHYS_OFFSET
276	default 0xc0000000 if EP93XX_SDCE0_PHYS_OFFSET || ARCH_SA1100
277	default 0xd0000000 if EP93XX_SDCE1_PHYS_OFFSET
278	default 0xe0000000 if EP93XX_SDCE2_PHYS_OFFSET
279	default 0xf0000000 if EP93XX_SDCE3_ASYNC_PHYS_OFFSET
280	help
281	  Please provide the physical address corresponding to the
282	  location of main memory in your system.
283
284config GENERIC_BUG
285	def_bool y
286	depends on BUG
287
288source "init/Kconfig"
289
290source "kernel/Kconfig.freezer"
291
292menu "System Type"
293
294config MMU
295	bool "MMU-based Paged Memory Management Support"
296	default y
297	help
298	  Select if you want MMU-based virtualised addressing space
299	  support by paged memory management. If unsure, say 'Y'.
300
301#
302# The "ARM system type" choice list is ordered alphabetically by option
303# text.  Please add new entries in the option alphabetic order.
304#
305choice
306	prompt "ARM system type"
307	default ARCH_VERSATILE if !MMU
308	default ARCH_MULTIPLATFORM if MMU
309
310config ARCH_MULTIPLATFORM
311	bool "Allow multiple platforms to be selected"
312	depends on MMU
313	select ARCH_WANT_OPTIONAL_GPIOLIB
314	select ARM_HAS_SG_CHAIN
315	select ARM_PATCH_PHYS_VIRT
316	select AUTO_ZRELADDR
317	select CLKSRC_OF
318	select COMMON_CLK
319	select GENERIC_CLOCKEVENTS
320	select MIGHT_HAVE_PCI
321	select MULTI_IRQ_HANDLER
322	select SPARSE_IRQ
323	select USE_OF
324
325config ARCH_REALVIEW
326	bool "ARM Ltd. RealView family"
327	select ARCH_WANT_OPTIONAL_GPIOLIB
328	select ARM_AMBA
329	select ARM_TIMER_SP804
330	select COMMON_CLK
331	select COMMON_CLK_VERSATILE
332	select GENERIC_CLOCKEVENTS
333	select GPIO_PL061 if GPIOLIB
334	select ICST
335	select NEED_MACH_MEMORY_H
336	select PLAT_VERSATILE
337	select PLAT_VERSATILE_SCHED_CLOCK
338	help
339	  This enables support for ARM Ltd RealView boards.
340
341config ARCH_VERSATILE
342	bool "ARM Ltd. Versatile family"
343	select ARCH_WANT_OPTIONAL_GPIOLIB
344	select ARM_AMBA
345	select ARM_TIMER_SP804
346	select ARM_VIC
347	select CLKDEV_LOOKUP
348	select GENERIC_CLOCKEVENTS
349	select HAVE_MACH_CLKDEV
350	select ICST
351	select PLAT_VERSATILE
352	select PLAT_VERSATILE_CLOCK
353	select PLAT_VERSATILE_SCHED_CLOCK
354	select VERSATILE_FPGA_IRQ
355	help
356	  This enables support for ARM Ltd Versatile board.
357
358config ARCH_AT91
359	bool "Atmel AT91"
360	select ARCH_REQUIRE_GPIOLIB
361	select CLKDEV_LOOKUP
362	select IRQ_DOMAIN
363	select NEED_MACH_IO_H if PCCARD
364	select PINCTRL
365	select PINCTRL_AT91
366	select USE_OF
367	help
368	  This enables support for systems based on Atmel
369	  AT91RM9200, AT91SAM9 and SAMA5 processors.
370
371config ARCH_CLPS711X
372	bool "Cirrus Logic CLPS711x/EP721x/EP731x-based"
373	select ARCH_REQUIRE_GPIOLIB
374	select AUTO_ZRELADDR
375	select CLKSRC_MMIO
376	select COMMON_CLK
377	select CPU_ARM720T
378	select GENERIC_CLOCKEVENTS
379	select MFD_SYSCON
380	select SOC_BUS
381	help
382	  Support for Cirrus Logic 711x/721x/731x based boards.
383
384config ARCH_GEMINI
385	bool "Cortina Systems Gemini"
386	select ARCH_REQUIRE_GPIOLIB
387	select CLKSRC_MMIO
388	select CPU_FA526
389	select GENERIC_CLOCKEVENTS
390	help
391	  Support for the Cortina Systems Gemini family SoCs
392
393config ARCH_EBSA110
394	bool "EBSA-110"
395	select ARCH_USES_GETTIMEOFFSET
396	select CPU_SA110
397	select ISA
398	select NEED_MACH_IO_H
399	select NEED_MACH_MEMORY_H
400	select NO_IOPORT_MAP
401	help
402	  This is an evaluation board for the StrongARM processor available
403	  from Digital. It has limited hardware on-board, including an
404	  Ethernet interface, two PCMCIA sockets, two serial ports and a
405	  parallel port.
406
407config ARCH_EFM32
408	bool "Energy Micro efm32"
409	depends on !MMU
410	select ARCH_REQUIRE_GPIOLIB
411	select ARM_NVIC
412	select AUTO_ZRELADDR
413	select CLKSRC_OF
414	select COMMON_CLK
415	select CPU_V7M
416	select GENERIC_CLOCKEVENTS
417	select NO_DMA
418	select NO_IOPORT_MAP
419	select SPARSE_IRQ
420	select USE_OF
421	help
422	  Support for Energy Micro's (now Silicon Labs) efm32 Giant Gecko
423	  processors.
424
425config ARCH_EP93XX
426	bool "EP93xx-based"
427	select ARCH_HAS_HOLES_MEMORYMODEL
428	select ARCH_REQUIRE_GPIOLIB
429	select ARCH_USES_GETTIMEOFFSET
430	select ARM_AMBA
431	select ARM_VIC
432	select CLKDEV_LOOKUP
433	select CPU_ARM920T
434	help
435	  This enables support for the Cirrus EP93xx series of CPUs.
436
437config ARCH_FOOTBRIDGE
438	bool "FootBridge"
439	select CPU_SA110
440	select FOOTBRIDGE
441	select GENERIC_CLOCKEVENTS
442	select HAVE_IDE
443	select NEED_MACH_IO_H if !MMU
444	select NEED_MACH_MEMORY_H
445	help
446	  Support for systems based on the DC21285 companion chip
447	  ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
448
449config ARCH_NETX
450	bool "Hilscher NetX based"
451	select ARM_VIC
452	select CLKSRC_MMIO
453	select CPU_ARM926T
454	select GENERIC_CLOCKEVENTS
455	help
456	  This enables support for systems based on the Hilscher NetX Soc
457
458config ARCH_IOP13XX
459	bool "IOP13xx-based"
460	depends on MMU
461	select CPU_XSC3
462	select NEED_MACH_MEMORY_H
463	select NEED_RET_TO_USER
464	select PCI
465	select PLAT_IOP
466	select VMSPLIT_1G
467	select SPARSE_IRQ
468	help
469	  Support for Intel's IOP13XX (XScale) family of processors.
470
471config ARCH_IOP32X
472	bool "IOP32x-based"
473	depends on MMU
474	select ARCH_REQUIRE_GPIOLIB
475	select CPU_XSCALE
476	select GPIO_IOP
477	select NEED_RET_TO_USER
478	select PCI
479	select PLAT_IOP
480	help
481	  Support for Intel's 80219 and IOP32X (XScale) family of
482	  processors.
483
484config ARCH_IOP33X
485	bool "IOP33x-based"
486	depends on MMU
487	select ARCH_REQUIRE_GPIOLIB
488	select CPU_XSCALE
489	select GPIO_IOP
490	select NEED_RET_TO_USER
491	select PCI
492	select PLAT_IOP
493	help
494	  Support for Intel's IOP33X (XScale) family of processors.
495
496config ARCH_IXP4XX
497	bool "IXP4xx-based"
498	depends on MMU
499	select ARCH_HAS_DMA_SET_COHERENT_MASK
500	select ARCH_REQUIRE_GPIOLIB
501	select ARCH_SUPPORTS_BIG_ENDIAN
502	select CLKSRC_MMIO
503	select CPU_XSCALE
504	select DMABOUNCE if PCI
505	select GENERIC_CLOCKEVENTS
506	select MIGHT_HAVE_PCI
507	select NEED_MACH_IO_H
508	select USB_EHCI_BIG_ENDIAN_DESC
509	select USB_EHCI_BIG_ENDIAN_MMIO
510	help
511	  Support for Intel's IXP4XX (XScale) family of processors.
512
513config ARCH_DOVE
514	bool "Marvell Dove"
515	select ARCH_REQUIRE_GPIOLIB
516	select CPU_PJ4
517	select GENERIC_CLOCKEVENTS
518	select MIGHT_HAVE_PCI
519	select MVEBU_MBUS
520	select PINCTRL
521	select PINCTRL_DOVE
522	select PLAT_ORION_LEGACY
523	help
524	  Support for the Marvell Dove SoC 88AP510
525
526config ARCH_MV78XX0
527	bool "Marvell MV78xx0"
528	select ARCH_REQUIRE_GPIOLIB
529	select CPU_FEROCEON
530	select GENERIC_CLOCKEVENTS
531	select MVEBU_MBUS
532	select PCI
533	select PLAT_ORION_LEGACY
534	help
535	  Support for the following Marvell MV78xx0 series SoCs:
536	  MV781x0, MV782x0.
537
538config ARCH_ORION5X
539	bool "Marvell Orion"
540	depends on MMU
541	select ARCH_REQUIRE_GPIOLIB
542	select CPU_FEROCEON
543	select GENERIC_CLOCKEVENTS
544	select MVEBU_MBUS
545	select PCI
546	select PLAT_ORION_LEGACY
547	help
548	  Support for the following Marvell Orion 5x series SoCs:
549	  Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
550	  Orion-2 (5281), Orion-1-90 (6183).
551
552config ARCH_MMP
553	bool "Marvell PXA168/910/MMP2"
554	depends on MMU
555	select ARCH_REQUIRE_GPIOLIB
556	select CLKDEV_LOOKUP
557	select GENERIC_ALLOCATOR
558	select GENERIC_CLOCKEVENTS
559	select GPIO_PXA
560	select IRQ_DOMAIN
561	select MULTI_IRQ_HANDLER
562	select PINCTRL
563	select PLAT_PXA
564	select SPARSE_IRQ
565	help
566	  Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
567
568config ARCH_KS8695
569	bool "Micrel/Kendin KS8695"
570	select ARCH_REQUIRE_GPIOLIB
571	select CLKSRC_MMIO
572	select CPU_ARM922T
573	select GENERIC_CLOCKEVENTS
574	select NEED_MACH_MEMORY_H
575	help
576	  Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
577	  System-on-Chip devices.
578
579config ARCH_W90X900
580	bool "Nuvoton W90X900 CPU"
581	select ARCH_REQUIRE_GPIOLIB
582	select CLKDEV_LOOKUP
583	select CLKSRC_MMIO
584	select CPU_ARM926T
585	select GENERIC_CLOCKEVENTS
586	help
587	  Support for Nuvoton (Winbond logic dept.) ARM9 processor,
588	  At present, the w90x900 has been renamed nuc900, regarding
589	  the ARM series product line, you can login the following
590	  link address to know more.
591
592	  <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
593		ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
594
595config ARCH_LPC32XX
596	bool "NXP LPC32XX"
597	select ARCH_REQUIRE_GPIOLIB
598	select ARM_AMBA
599	select CLKDEV_LOOKUP
600	select CLKSRC_MMIO
601	select CPU_ARM926T
602	select GENERIC_CLOCKEVENTS
603	select HAVE_IDE
604	select USE_OF
605	help
606	  Support for the NXP LPC32XX family of processors
607
608config ARCH_PXA
609	bool "PXA2xx/PXA3xx-based"
610	depends on MMU
611	select ARCH_MTD_XIP
612	select ARCH_REQUIRE_GPIOLIB
613	select ARM_CPU_SUSPEND if PM
614	select AUTO_ZRELADDR
615	select CLKDEV_LOOKUP
616	select CLKSRC_MMIO
617	select CLKSRC_OF
618	select GENERIC_CLOCKEVENTS
619	select GPIO_PXA
620	select HAVE_IDE
621	select MULTI_IRQ_HANDLER
622	select PLAT_PXA
623	select SPARSE_IRQ
624	help
625	  Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
626
627config ARCH_MSM
628	bool "Qualcomm MSM (non-multiplatform)"
629	select ARCH_REQUIRE_GPIOLIB
630	select COMMON_CLK
631	select GENERIC_CLOCKEVENTS
632	help
633	  Support for Qualcomm MSM/QSD based systems.  This runs on the
634	  apps processor of the MSM/QSD and depends on a shared memory
635	  interface to the modem processor which runs the baseband
636	  stack and controls some vital subsystems
637	  (clock and power control, etc).
638
639config ARCH_SHMOBILE_LEGACY
640	bool "Renesas ARM SoCs (non-multiplatform)"
641	select ARCH_SHMOBILE
642	select ARM_PATCH_PHYS_VIRT if MMU
643	select CLKDEV_LOOKUP
644	select CPU_V7
645	select GENERIC_CLOCKEVENTS
646	select HAVE_ARM_SCU if SMP
647	select HAVE_ARM_TWD if SMP
648	select HAVE_MACH_CLKDEV
649	select HAVE_SMP
650	select MIGHT_HAVE_CACHE_L2X0
651	select MULTI_IRQ_HANDLER
652	select NO_IOPORT_MAP
653	select PINCTRL
654	select PM_GENERIC_DOMAINS if PM
655	select SH_CLK_CPG
656	select SPARSE_IRQ
657	help
658	  Support for Renesas ARM SoC platforms using a non-multiplatform
659	  kernel. This includes the SH-Mobile, R-Mobile, EMMA-Mobile, R-Car
660	  and RZ families.
661
662config ARCH_RPC
663	bool "RiscPC"
664	select ARCH_ACORN
665	select ARCH_MAY_HAVE_PC_FDC
666	select ARCH_SPARSEMEM_ENABLE
667	select ARCH_USES_GETTIMEOFFSET
668	select CPU_SA110
669	select FIQ
670	select HAVE_IDE
671	select HAVE_PATA_PLATFORM
672	select ISA_DMA_API
673	select NEED_MACH_IO_H
674	select NEED_MACH_MEMORY_H
675	select NO_IOPORT_MAP
676	select VIRT_TO_BUS
677	help
678	  On the Acorn Risc-PC, Linux can support the internal IDE disk and
679	  CD-ROM interface, serial and parallel port, and the floppy drive.
680
681config ARCH_SA1100
682	bool "SA1100-based"
683	select ARCH_MTD_XIP
684	select ARCH_REQUIRE_GPIOLIB
685	select ARCH_SPARSEMEM_ENABLE
686	select CLKDEV_LOOKUP
687	select CLKSRC_MMIO
688	select CPU_FREQ
689	select CPU_SA1100
690	select GENERIC_CLOCKEVENTS
691	select HAVE_IDE
692	select IRQ_DOMAIN
693	select ISA
694	select MULTI_IRQ_HANDLER
695	select NEED_MACH_MEMORY_H
696	select SPARSE_IRQ
697	help
698	  Support for StrongARM 11x0 based boards.
699
700config ARCH_S3C24XX
701	bool "Samsung S3C24XX SoCs"
702	select ARCH_REQUIRE_GPIOLIB
703	select ATAGS
704	select CLKDEV_LOOKUP
705	select CLKSRC_SAMSUNG_PWM
706	select GENERIC_CLOCKEVENTS
707	select GPIO_SAMSUNG
708	select HAVE_S3C2410_I2C if I2C
709	select HAVE_S3C2410_WATCHDOG if WATCHDOG
710	select HAVE_S3C_RTC if RTC_CLASS
711	select MULTI_IRQ_HANDLER
712	select NEED_MACH_IO_H
713	select SAMSUNG_ATAGS
714	help
715	  Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443
716	  and S3C2450 SoCs based systems, such as the Simtec Electronics BAST
717	  (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or the
718	  Samsung SMDK2410 development board (and derivatives).
719
720config ARCH_S3C64XX
721	bool "Samsung S3C64XX"
722	select ARCH_REQUIRE_GPIOLIB
723	select ARM_AMBA
724	select ARM_VIC
725	select ATAGS
726	select CLKDEV_LOOKUP
727	select CLKSRC_SAMSUNG_PWM
728	select COMMON_CLK_SAMSUNG
729	select CPU_V6K
730	select GENERIC_CLOCKEVENTS
731	select GPIO_SAMSUNG
732	select HAVE_S3C2410_I2C if I2C
733	select HAVE_S3C2410_WATCHDOG if WATCHDOG
734	select HAVE_TCM
735	select NO_IOPORT_MAP
736	select PLAT_SAMSUNG
737	select PM_GENERIC_DOMAINS if PM
738	select S3C_DEV_NAND
739	select S3C_GPIO_TRACK
740	select SAMSUNG_ATAGS
741	select SAMSUNG_WAKEMASK
742	select SAMSUNG_WDT_RESET
743	help
744	  Samsung S3C64XX series based systems
745
746config ARCH_DAVINCI
747	bool "TI DaVinci"
748	select ARCH_HAS_HOLES_MEMORYMODEL
749	select ARCH_REQUIRE_GPIOLIB
750	select CLKDEV_LOOKUP
751	select GENERIC_ALLOCATOR
752	select GENERIC_CLOCKEVENTS
753	select GENERIC_IRQ_CHIP
754	select HAVE_IDE
755	select TI_PRIV_EDMA
756	select USE_OF
757	select ZONE_DMA
758	help
759	  Support for TI's DaVinci platform.
760
761config ARCH_OMAP1
762	bool "TI OMAP1"
763	depends on MMU
764	select ARCH_HAS_HOLES_MEMORYMODEL
765	select ARCH_OMAP
766	select ARCH_REQUIRE_GPIOLIB
767	select CLKDEV_LOOKUP
768	select CLKSRC_MMIO
769	select GENERIC_CLOCKEVENTS
770	select GENERIC_IRQ_CHIP
771	select HAVE_IDE
772	select IRQ_DOMAIN
773	select NEED_MACH_IO_H if PCCARD
774	select NEED_MACH_MEMORY_H
775	help
776	  Support for older TI OMAP1 (omap7xx, omap15xx or omap16xx)
777
778endchoice
779
780menu "Multiple platform selection"
781	depends on ARCH_MULTIPLATFORM
782
783comment "CPU Core family selection"
784
785config ARCH_MULTI_V4
786	bool "ARMv4 based platforms (FA526)"
787	depends on !ARCH_MULTI_V6_V7
788	select ARCH_MULTI_V4_V5
789	select CPU_FA526
790
791config ARCH_MULTI_V4T
792	bool "ARMv4T based platforms (ARM720T, ARM920T, ...)"
793	depends on !ARCH_MULTI_V6_V7
794	select ARCH_MULTI_V4_V5
795	select CPU_ARM920T if !(CPU_ARM7TDMI || CPU_ARM720T || \
796		CPU_ARM740T || CPU_ARM9TDMI || CPU_ARM922T || \
797		CPU_ARM925T || CPU_ARM940T)
798
799config ARCH_MULTI_V5
800	bool "ARMv5 based platforms (ARM926T, XSCALE, PJ1, ...)"
801	depends on !ARCH_MULTI_V6_V7
802	select ARCH_MULTI_V4_V5
803	select CPU_ARM926T if !(CPU_ARM946E || CPU_ARM1020 || \
804		CPU_ARM1020E || CPU_ARM1022 || CPU_ARM1026 || \
805		CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_FEROCEON)
806
807config ARCH_MULTI_V4_V5
808	bool
809
810config ARCH_MULTI_V6
811	bool "ARMv6 based platforms (ARM11)"
812	select ARCH_MULTI_V6_V7
813	select CPU_V6K
814
815config ARCH_MULTI_V7
816	bool "ARMv7 based platforms (Cortex-A, PJ4, Scorpion, Krait)"
817	default y
818	select ARCH_MULTI_V6_V7
819	select CPU_V7
820	select HAVE_SMP
821
822config ARCH_MULTI_V6_V7
823	bool
824	select MIGHT_HAVE_CACHE_L2X0
825
826config ARCH_MULTI_CPU_AUTO
827	def_bool !(ARCH_MULTI_V4 || ARCH_MULTI_V4T || ARCH_MULTI_V6_V7)
828	select ARCH_MULTI_V5
829
830endmenu
831
832config ARCH_VIRT
833	bool "Dummy Virtual Machine" if ARCH_MULTI_V7
834	select ARM_AMBA
835	select ARM_GIC
836	select ARM_PSCI
837	select HAVE_ARM_ARCH_TIMER
838
839#
840# This is sorted alphabetically by mach-* pathname.  However, plat-*
841# Kconfigs may be included either alphabetically (according to the
842# plat- suffix) or along side the corresponding mach-* source.
843#
844source "arch/arm/mach-mvebu/Kconfig"
845
846source "arch/arm/mach-asm9260/Kconfig"
847
848source "arch/arm/mach-at91/Kconfig"
849
850source "arch/arm/mach-axxia/Kconfig"
851
852source "arch/arm/mach-bcm/Kconfig"
853
854source "arch/arm/mach-berlin/Kconfig"
855
856source "arch/arm/mach-clps711x/Kconfig"
857
858source "arch/arm/mach-cns3xxx/Kconfig"
859
860source "arch/arm/mach-davinci/Kconfig"
861
862source "arch/arm/mach-dove/Kconfig"
863
864source "arch/arm/mach-ep93xx/Kconfig"
865
866source "arch/arm/mach-footbridge/Kconfig"
867
868source "arch/arm/mach-gemini/Kconfig"
869
870source "arch/arm/mach-highbank/Kconfig"
871
872source "arch/arm/mach-hisi/Kconfig"
873
874source "arch/arm/mach-integrator/Kconfig"
875
876source "arch/arm/mach-iop32x/Kconfig"
877
878source "arch/arm/mach-iop33x/Kconfig"
879
880source "arch/arm/mach-iop13xx/Kconfig"
881
882source "arch/arm/mach-ixp4xx/Kconfig"
883
884source "arch/arm/mach-keystone/Kconfig"
885
886source "arch/arm/mach-ks8695/Kconfig"
887
888source "arch/arm/mach-meson/Kconfig"
889
890source "arch/arm/mach-msm/Kconfig"
891
892source "arch/arm/mach-moxart/Kconfig"
893
894source "arch/arm/mach-mv78xx0/Kconfig"
895
896source "arch/arm/mach-imx/Kconfig"
897
898source "arch/arm/mach-mediatek/Kconfig"
899
900source "arch/arm/mach-mxs/Kconfig"
901
902source "arch/arm/mach-netx/Kconfig"
903
904source "arch/arm/mach-nomadik/Kconfig"
905
906source "arch/arm/mach-nspire/Kconfig"
907
908source "arch/arm/plat-omap/Kconfig"
909
910source "arch/arm/mach-omap1/Kconfig"
911
912source "arch/arm/mach-omap2/Kconfig"
913
914source "arch/arm/mach-orion5x/Kconfig"
915
916source "arch/arm/mach-picoxcell/Kconfig"
917
918source "arch/arm/mach-pxa/Kconfig"
919source "arch/arm/plat-pxa/Kconfig"
920
921source "arch/arm/mach-mmp/Kconfig"
922
923source "arch/arm/mach-qcom/Kconfig"
924
925source "arch/arm/mach-realview/Kconfig"
926
927source "arch/arm/mach-rockchip/Kconfig"
928
929source "arch/arm/mach-sa1100/Kconfig"
930
931source "arch/arm/mach-socfpga/Kconfig"
932
933source "arch/arm/mach-spear/Kconfig"
934
935source "arch/arm/mach-sti/Kconfig"
936
937source "arch/arm/mach-s3c24xx/Kconfig"
938
939source "arch/arm/mach-s3c64xx/Kconfig"
940
941source "arch/arm/mach-s5pv210/Kconfig"
942
943source "arch/arm/mach-exynos/Kconfig"
944source "arch/arm/plat-samsung/Kconfig"
945
946source "arch/arm/mach-shmobile/Kconfig"
947
948source "arch/arm/mach-sunxi/Kconfig"
949
950source "arch/arm/mach-prima2/Kconfig"
951
952source "arch/arm/mach-tegra/Kconfig"
953
954source "arch/arm/mach-u300/Kconfig"
955
956source "arch/arm/mach-ux500/Kconfig"
957
958source "arch/arm/mach-versatile/Kconfig"
959
960source "arch/arm/mach-vexpress/Kconfig"
961source "arch/arm/plat-versatile/Kconfig"
962
963source "arch/arm/mach-vt8500/Kconfig"
964
965source "arch/arm/mach-w90x900/Kconfig"
966
967source "arch/arm/mach-zynq/Kconfig"
968
969# Definitions to make life easier
970config ARCH_ACORN
971	bool
972
973config PLAT_IOP
974	bool
975	select GENERIC_CLOCKEVENTS
976
977config PLAT_ORION
978	bool
979	select CLKSRC_MMIO
980	select COMMON_CLK
981	select GENERIC_IRQ_CHIP
982	select IRQ_DOMAIN
983
984config PLAT_ORION_LEGACY
985	bool
986	select PLAT_ORION
987
988config PLAT_PXA
989	bool
990
991config PLAT_VERSATILE
992	bool
993
994config ARM_TIMER_SP804
995	bool
996	select CLKSRC_MMIO
997	select CLKSRC_OF if OF
998
999source "arch/arm/firmware/Kconfig"
1000
1001source arch/arm/mm/Kconfig
1002
1003config IWMMXT
1004	bool "Enable iWMMXt support"
1005	depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4 || CPU_PJ4B
1006	default y if PXA27x || PXA3xx || ARCH_MMP || CPU_PJ4 || CPU_PJ4B
1007	help
1008	  Enable support for iWMMXt context switching at run time if
1009	  running on a CPU that supports it.
1010
1011config MULTI_IRQ_HANDLER
1012	bool
1013	help
1014	  Allow each machine to specify it's own IRQ handler at run time.
1015
1016if !MMU
1017source "arch/arm/Kconfig-nommu"
1018endif
1019
1020config PJ4B_ERRATA_4742
1021	bool "PJ4B Errata 4742: IDLE Wake Up Commands can Cause the CPU Core to Cease Operation"
1022	depends on CPU_PJ4B && MACH_ARMADA_370
1023	default y
1024	help
1025	  When coming out of either a Wait for Interrupt (WFI) or a Wait for
1026	  Event (WFE) IDLE states, a specific timing sensitivity exists between
1027	  the retiring WFI/WFE instructions and the newly issued subsequent
1028	  instructions.  This sensitivity can result in a CPU hang scenario.
1029	  Workaround:
1030	  The software must insert either a Data Synchronization Barrier (DSB)
1031	  or Data Memory Barrier (DMB) command immediately after the WFI/WFE
1032	  instruction
1033
1034config ARM_ERRATA_326103
1035	bool "ARM errata: FSR write bit incorrect on a SWP to read-only memory"
1036	depends on CPU_V6
1037	help
1038	  Executing a SWP instruction to read-only memory does not set bit 11
1039	  of the FSR on the ARM 1136 prior to r1p0. This causes the kernel to
1040	  treat the access as a read, preventing a COW from occurring and
1041	  causing the faulting task to livelock.
1042
1043config ARM_ERRATA_411920
1044	bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
1045	depends on CPU_V6 || CPU_V6K
1046	help
1047	  Invalidation of the Instruction Cache operation can
1048	  fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
1049	  It does not affect the MPCore. This option enables the ARM Ltd.
1050	  recommended workaround.
1051
1052config ARM_ERRATA_430973
1053	bool "ARM errata: Stale prediction on replaced interworking branch"
1054	depends on CPU_V7
1055	help
1056	  This option enables the workaround for the 430973 Cortex-A8
1057	  (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
1058	  interworking branch is replaced with another code sequence at the
1059	  same virtual address, whether due to self-modifying code or virtual
1060	  to physical address re-mapping, Cortex-A8 does not recover from the
1061	  stale interworking branch prediction. This results in Cortex-A8
1062	  executing the new code sequence in the incorrect ARM or Thumb state.
1063	  The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
1064	  and also flushes the branch target cache at every context switch.
1065	  Note that setting specific bits in the ACTLR register may not be
1066	  available in non-secure mode.
1067
1068config ARM_ERRATA_458693
1069	bool "ARM errata: Processor deadlock when a false hazard is created"
1070	depends on CPU_V7
1071	depends on !ARCH_MULTIPLATFORM
1072	help
1073	  This option enables the workaround for the 458693 Cortex-A8 (r2p0)
1074	  erratum. For very specific sequences of memory operations, it is
1075	  possible for a hazard condition intended for a cache line to instead
1076	  be incorrectly associated with a different cache line. This false
1077	  hazard might then cause a processor deadlock. The workaround enables
1078	  the L1 caching of the NEON accesses and disables the PLD instruction
1079	  in the ACTLR register. Note that setting specific bits in the ACTLR
1080	  register may not be available in non-secure mode.
1081
1082config ARM_ERRATA_460075
1083	bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
1084	depends on CPU_V7
1085	depends on !ARCH_MULTIPLATFORM
1086	help
1087	  This option enables the workaround for the 460075 Cortex-A8 (r2p0)
1088	  erratum. Any asynchronous access to the L2 cache may encounter a
1089	  situation in which recent store transactions to the L2 cache are lost
1090	  and overwritten with stale memory contents from external memory. The
1091	  workaround disables the write-allocate mode for the L2 cache via the
1092	  ACTLR register. Note that setting specific bits in the ACTLR register
1093	  may not be available in non-secure mode.
1094
1095config ARM_ERRATA_742230
1096	bool "ARM errata: DMB operation may be faulty"
1097	depends on CPU_V7 && SMP
1098	depends on !ARCH_MULTIPLATFORM
1099	help
1100	  This option enables the workaround for the 742230 Cortex-A9
1101	  (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
1102	  between two write operations may not ensure the correct visibility
1103	  ordering of the two writes. This workaround sets a specific bit in
1104	  the diagnostic register of the Cortex-A9 which causes the DMB
1105	  instruction to behave as a DSB, ensuring the correct behaviour of
1106	  the two writes.
1107
1108config ARM_ERRATA_742231
1109	bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
1110	depends on CPU_V7 && SMP
1111	depends on !ARCH_MULTIPLATFORM
1112	help
1113	  This option enables the workaround for the 742231 Cortex-A9
1114	  (r2p0..r2p2) erratum. Under certain conditions, specific to the
1115	  Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
1116	  accessing some data located in the same cache line, may get corrupted
1117	  data due to bad handling of the address hazard when the line gets
1118	  replaced from one of the CPUs at the same time as another CPU is
1119	  accessing it. This workaround sets specific bits in the diagnostic
1120	  register of the Cortex-A9 which reduces the linefill issuing
1121	  capabilities of the processor.
1122
1123config ARM_ERRATA_643719
1124	bool "ARM errata: LoUIS bit field in CLIDR register is incorrect"
1125	depends on CPU_V7 && SMP
1126	help
1127	  This option enables the workaround for the 643719 Cortex-A9 (prior to
1128	  r1p0) erratum. On affected cores the LoUIS bit field of the CLIDR
1129	  register returns zero when it should return one. The workaround
1130	  corrects this value, ensuring cache maintenance operations which use
1131	  it behave as intended and avoiding data corruption.
1132
1133config ARM_ERRATA_720789
1134	bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
1135	depends on CPU_V7
1136	help
1137	  This option enables the workaround for the 720789 Cortex-A9 (prior to
1138	  r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
1139	  broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
1140	  As a consequence of this erratum, some TLB entries which should be
1141	  invalidated are not, resulting in an incoherency in the system page
1142	  tables. The workaround changes the TLB flushing routines to invalidate
1143	  entries regardless of the ASID.
1144
1145config ARM_ERRATA_743622
1146	bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
1147	depends on CPU_V7
1148	depends on !ARCH_MULTIPLATFORM
1149	help
1150	  This option enables the workaround for the 743622 Cortex-A9
1151	  (r2p*) erratum. Under very rare conditions, a faulty
1152	  optimisation in the Cortex-A9 Store Buffer may lead to data
1153	  corruption. This workaround sets a specific bit in the diagnostic
1154	  register of the Cortex-A9 which disables the Store Buffer
1155	  optimisation, preventing the defect from occurring. This has no
1156	  visible impact on the overall performance or power consumption of the
1157	  processor.
1158
1159config ARM_ERRATA_751472
1160	bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
1161	depends on CPU_V7
1162	depends on !ARCH_MULTIPLATFORM
1163	help
1164	  This option enables the workaround for the 751472 Cortex-A9 (prior
1165	  to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
1166	  completion of a following broadcasted operation if the second
1167	  operation is received by a CPU before the ICIALLUIS has completed,
1168	  potentially leading to corrupted entries in the cache or TLB.
1169
1170config ARM_ERRATA_754322
1171	bool "ARM errata: possible faulty MMU translations following an ASID switch"
1172	depends on CPU_V7
1173	help
1174	  This option enables the workaround for the 754322 Cortex-A9 (r2p*,
1175	  r3p*) erratum. A speculative memory access may cause a page table walk
1176	  which starts prior to an ASID switch but completes afterwards. This
1177	  can populate the micro-TLB with a stale entry which may be hit with
1178	  the new ASID. This workaround places two dsb instructions in the mm
1179	  switching code so that no page table walks can cross the ASID switch.
1180
1181config ARM_ERRATA_754327
1182	bool "ARM errata: no automatic Store Buffer drain"
1183	depends on CPU_V7 && SMP
1184	help
1185	  This option enables the workaround for the 754327 Cortex-A9 (prior to
1186	  r2p0) erratum. The Store Buffer does not have any automatic draining
1187	  mechanism and therefore a livelock may occur if an external agent
1188	  continuously polls a memory location waiting to observe an update.
1189	  This workaround defines cpu_relax() as smp_mb(), preventing correctly
1190	  written polling loops from denying visibility of updates to memory.
1191
1192config ARM_ERRATA_364296
1193	bool "ARM errata: Possible cache data corruption with hit-under-miss enabled"
1194	depends on CPU_V6
1195	help
1196	  This options enables the workaround for the 364296 ARM1136
1197	  r0p2 erratum (possible cache data corruption with
1198	  hit-under-miss enabled). It sets the undocumented bit 31 in
1199	  the auxiliary control register and the FI bit in the control
1200	  register, thus disabling hit-under-miss without putting the
1201	  processor into full low interrupt latency mode. ARM11MPCore
1202	  is not affected.
1203
1204config ARM_ERRATA_764369
1205	bool "ARM errata: Data cache line maintenance operation by MVA may not succeed"
1206	depends on CPU_V7 && SMP
1207	help
1208	  This option enables the workaround for erratum 764369
1209	  affecting Cortex-A9 MPCore with two or more processors (all
1210	  current revisions). Under certain timing circumstances, a data
1211	  cache line maintenance operation by MVA targeting an Inner
1212	  Shareable memory region may fail to proceed up to either the
1213	  Point of Coherency or to the Point of Unification of the
1214	  system. This workaround adds a DSB instruction before the
1215	  relevant cache maintenance functions and sets a specific bit
1216	  in the diagnostic control register of the SCU.
1217
1218config ARM_ERRATA_775420
1219       bool "ARM errata: A data cache maintenance operation which aborts, might lead to deadlock"
1220       depends on CPU_V7
1221       help
1222	 This option enables the workaround for the 775420 Cortex-A9 (r2p2,
1223	 r2p6,r2p8,r2p10,r3p0) erratum. In case a date cache maintenance
1224	 operation aborts with MMU exception, it might cause the processor
1225	 to deadlock. This workaround puts DSB before executing ISB if
1226	 an abort may occur on cache maintenance.
1227
1228config ARM_ERRATA_798181
1229	bool "ARM errata: TLBI/DSB failure on Cortex-A15"
1230	depends on CPU_V7 && SMP
1231	help
1232	  On Cortex-A15 (r0p0..r3p2) the TLBI*IS/DSB operations are not
1233	  adequately shooting down all use of the old entries. This
1234	  option enables the Linux kernel workaround for this erratum
1235	  which sends an IPI to the CPUs that are running the same ASID
1236	  as the one being invalidated.
1237
1238config ARM_ERRATA_773022
1239	bool "ARM errata: incorrect instructions may be executed from loop buffer"
1240	depends on CPU_V7
1241	help
1242	  This option enables the workaround for the 773022 Cortex-A15
1243	  (up to r0p4) erratum. In certain rare sequences of code, the
1244	  loop buffer may deliver incorrect instructions. This
1245	  workaround disables the loop buffer to avoid the erratum.
1246
1247endmenu
1248
1249source "arch/arm/common/Kconfig"
1250
1251menu "Bus support"
1252
1253config ISA
1254	bool
1255	help
1256	  Find out whether you have ISA slots on your motherboard.  ISA is the
1257	  name of a bus system, i.e. the way the CPU talks to the other stuff
1258	  inside your box.  Other bus systems are PCI, EISA, MicroChannel
1259	  (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
1260	  newer boards don't support it.  If you have ISA, say Y, otherwise N.
1261
1262# Select ISA DMA controller support
1263config ISA_DMA
1264	bool
1265	select ISA_DMA_API
1266
1267# Select ISA DMA interface
1268config ISA_DMA_API
1269	bool
1270
1271config PCI
1272	bool "PCI support" if MIGHT_HAVE_PCI
1273	help
1274	  Find out whether you have a PCI motherboard. PCI is the name of a
1275	  bus system, i.e. the way the CPU talks to the other stuff inside
1276	  your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
1277	  VESA. If you have PCI, say Y, otherwise N.
1278
1279config PCI_DOMAINS
1280	bool
1281	depends on PCI
1282
1283config PCI_NANOENGINE
1284	bool "BSE nanoEngine PCI support"
1285	depends on SA1100_NANOENGINE
1286	help
1287	  Enable PCI on the BSE nanoEngine board.
1288
1289config PCI_SYSCALL
1290	def_bool PCI
1291
1292config PCI_HOST_ITE8152
1293	bool
1294	depends on PCI && MACH_ARMCORE
1295	default y
1296	select DMABOUNCE
1297
1298source "drivers/pci/Kconfig"
1299source "drivers/pci/pcie/Kconfig"
1300
1301source "drivers/pcmcia/Kconfig"
1302
1303endmenu
1304
1305menu "Kernel Features"
1306
1307config HAVE_SMP
1308	bool
1309	help
1310	  This option should be selected by machines which have an SMP-
1311	  capable CPU.
1312
1313	  The only effect of this option is to make the SMP-related
1314	  options available to the user for configuration.
1315
1316config SMP
1317	bool "Symmetric Multi-Processing"
1318	depends on CPU_V6K || CPU_V7
1319	depends on GENERIC_CLOCKEVENTS
1320	depends on HAVE_SMP
1321	depends on MMU || ARM_MPU
1322	help
1323	  This enables support for systems with more than one CPU. If you have
1324	  a system with only one CPU, say N. If you have a system with more
1325	  than one CPU, say Y.
1326
1327	  If you say N here, the kernel will run on uni- and multiprocessor
1328	  machines, but will use only one CPU of a multiprocessor machine. If
1329	  you say Y here, the kernel will run on many, but not all,
1330	  uniprocessor machines. On a uniprocessor machine, the kernel
1331	  will run faster if you say N here.
1332
1333	  See also <file:Documentation/x86/i386/IO-APIC.txt>,
1334	  <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
1335	  <http://tldp.org/HOWTO/SMP-HOWTO.html>.
1336
1337	  If you don't know what to do here, say N.
1338
1339config SMP_ON_UP
1340	bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
1341	depends on SMP && !XIP_KERNEL && MMU
1342	default y
1343	help
1344	  SMP kernels contain instructions which fail on non-SMP processors.
1345	  Enabling this option allows the kernel to modify itself to make
1346	  these instructions safe.  Disabling it allows about 1K of space
1347	  savings.
1348
1349	  If you don't know what to do here, say Y.
1350
1351config ARM_CPU_TOPOLOGY
1352	bool "Support cpu topology definition"
1353	depends on SMP && CPU_V7
1354	default y
1355	help
1356	  Support ARM cpu topology definition. The MPIDR register defines
1357	  affinity between processors which is then used to describe the cpu
1358	  topology of an ARM System.
1359
1360config SCHED_MC
1361	bool "Multi-core scheduler support"
1362	depends on ARM_CPU_TOPOLOGY
1363	help
1364	  Multi-core scheduler support improves the CPU scheduler's decision
1365	  making when dealing with multi-core CPU chips at a cost of slightly
1366	  increased overhead in some places. If unsure say N here.
1367
1368config SCHED_SMT
1369	bool "SMT scheduler support"
1370	depends on ARM_CPU_TOPOLOGY
1371	help
1372	  Improves the CPU scheduler's decision making when dealing with
1373	  MultiThreading at a cost of slightly increased overhead in some
1374	  places. If unsure say N here.
1375
1376config HAVE_ARM_SCU
1377	bool
1378	help
1379	  This option enables support for the ARM system coherency unit
1380
1381config HAVE_ARM_ARCH_TIMER
1382	bool "Architected timer support"
1383	depends on CPU_V7
1384	select ARM_ARCH_TIMER
1385	select GENERIC_CLOCKEVENTS
1386	help
1387	  This option enables support for the ARM architected timer
1388
1389config HAVE_ARM_TWD
1390	bool
1391	depends on SMP
1392	select CLKSRC_OF if OF
1393	help
1394	  This options enables support for the ARM timer and watchdog unit
1395
1396config MCPM
1397	bool "Multi-Cluster Power Management"
1398	depends on CPU_V7 && SMP
1399	help
1400	  This option provides the common power management infrastructure
1401	  for (multi-)cluster based systems, such as big.LITTLE based
1402	  systems.
1403
1404config MCPM_QUAD_CLUSTER
1405	bool
1406	depends on MCPM
1407	help
1408	  To avoid wasting resources unnecessarily, MCPM only supports up
1409	  to 2 clusters by default.
1410	  Platforms with 3 or 4 clusters that use MCPM must select this
1411	  option to allow the additional clusters to be managed.
1412
1413config BIG_LITTLE
1414	bool "big.LITTLE support (Experimental)"
1415	depends on CPU_V7 && SMP
1416	select MCPM
1417	help
1418	  This option enables support selections for the big.LITTLE
1419	  system architecture.
1420
1421config BL_SWITCHER
1422	bool "big.LITTLE switcher support"
1423	depends on BIG_LITTLE && MCPM && HOTPLUG_CPU
1424	select ARM_CPU_SUSPEND
1425	select CPU_PM
1426	help
1427	  The big.LITTLE "switcher" provides the core functionality to
1428	  transparently handle transition between a cluster of A15's
1429	  and a cluster of A7's in a big.LITTLE system.
1430
1431config BL_SWITCHER_DUMMY_IF
1432	tristate "Simple big.LITTLE switcher user interface"
1433	depends on BL_SWITCHER && DEBUG_KERNEL
1434	help
1435	  This is a simple and dummy char dev interface to control
1436	  the big.LITTLE switcher core code.  It is meant for
1437	  debugging purposes only.
1438
1439choice
1440	prompt "Memory split"
1441	depends on MMU
1442	default VMSPLIT_3G
1443	help
1444	  Select the desired split between kernel and user memory.
1445
1446	  If you are not absolutely sure what you are doing, leave this
1447	  option alone!
1448
1449	config VMSPLIT_3G
1450		bool "3G/1G user/kernel split"
1451	config VMSPLIT_2G
1452		bool "2G/2G user/kernel split"
1453	config VMSPLIT_1G
1454		bool "1G/3G user/kernel split"
1455endchoice
1456
1457config PAGE_OFFSET
1458	hex
1459	default PHYS_OFFSET if !MMU
1460	default 0x40000000 if VMSPLIT_1G
1461	default 0x80000000 if VMSPLIT_2G
1462	default 0xC0000000
1463
1464config NR_CPUS
1465	int "Maximum number of CPUs (2-32)"
1466	range 2 32
1467	depends on SMP
1468	default "4"
1469
1470config HOTPLUG_CPU
1471	bool "Support for hot-pluggable CPUs"
1472	depends on SMP
1473	help
1474	  Say Y here to experiment with turning CPUs off and on.  CPUs
1475	  can be controlled through /sys/devices/system/cpu.
1476
1477config ARM_PSCI
1478	bool "Support for the ARM Power State Coordination Interface (PSCI)"
1479	depends on CPU_V7
1480	help
1481	  Say Y here if you want Linux to communicate with system firmware
1482	  implementing the PSCI specification for CPU-centric power
1483	  management operations described in ARM document number ARM DEN
1484	  0022A ("Power State Coordination Interface System Software on
1485	  ARM processors").
1486
1487# The GPIO number here must be sorted by descending number. In case of
1488# a multiplatform kernel, we just want the highest value required by the
1489# selected platforms.
1490config ARCH_NR_GPIO
1491	int
1492	default 1024 if ARCH_SHMOBILE || ARCH_TEGRA
1493	default 512 if ARCH_EXYNOS || ARCH_KEYSTONE || SOC_OMAP5 || \
1494		SOC_DRA7XX || ARCH_S3C24XX || ARCH_S3C64XX || ARCH_S5PV210
1495	default 416 if ARCH_SUNXI
1496	default 392 if ARCH_U8500
1497	default 352 if ARCH_VT8500
1498	default 288 if ARCH_ROCKCHIP
1499	default 264 if MACH_H4700
1500	default 0
1501	help
1502	  Maximum number of GPIOs in the system.
1503
1504	  If unsure, leave the default value.
1505
1506source kernel/Kconfig.preempt
1507
1508config HZ_FIXED
1509	int
1510	default 200 if ARCH_EBSA110 || ARCH_S3C24XX || \
1511		ARCH_S5PV210 || ARCH_EXYNOS4
1512	default AT91_TIMER_HZ if ARCH_AT91
1513	default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE_LEGACY
1514	default 0
1515
1516choice
1517	depends on HZ_FIXED = 0
1518	prompt "Timer frequency"
1519
1520config HZ_100
1521	bool "100 Hz"
1522
1523config HZ_200
1524	bool "200 Hz"
1525
1526config HZ_250
1527	bool "250 Hz"
1528
1529config HZ_300
1530	bool "300 Hz"
1531
1532config HZ_500
1533	bool "500 Hz"
1534
1535config HZ_1000
1536	bool "1000 Hz"
1537
1538endchoice
1539
1540config HZ
1541	int
1542	default HZ_FIXED if HZ_FIXED != 0
1543	default 100 if HZ_100
1544	default 200 if HZ_200
1545	default 250 if HZ_250
1546	default 300 if HZ_300
1547	default 500 if HZ_500
1548	default 1000
1549
1550config SCHED_HRTICK
1551	def_bool HIGH_RES_TIMERS
1552
1553config THUMB2_KERNEL
1554	bool "Compile the kernel in Thumb-2 mode" if !CPU_THUMBONLY
1555	depends on (CPU_V7 || CPU_V7M) && !CPU_V6 && !CPU_V6K
1556	default y if CPU_THUMBONLY
1557	select AEABI
1558	select ARM_ASM_UNIFIED
1559	select ARM_UNWIND
1560	help
1561	  By enabling this option, the kernel will be compiled in
1562	  Thumb-2 mode. A compiler/assembler that understand the unified
1563	  ARM-Thumb syntax is needed.
1564
1565	  If unsure, say N.
1566
1567config THUMB2_AVOID_R_ARM_THM_JUMP11
1568	bool "Work around buggy Thumb-2 short branch relocations in gas"
1569	depends on THUMB2_KERNEL && MODULES
1570	default y
1571	help
1572	  Various binutils versions can resolve Thumb-2 branches to
1573	  locally-defined, preemptible global symbols as short-range "b.n"
1574	  branch instructions.
1575
1576	  This is a problem, because there's no guarantee the final
1577	  destination of the symbol, or any candidate locations for a
1578	  trampoline, are within range of the branch.  For this reason, the
1579	  kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
1580	  relocation in modules at all, and it makes little sense to add
1581	  support.
1582
1583	  The symptom is that the kernel fails with an "unsupported
1584	  relocation" error when loading some modules.
1585
1586	  Until fixed tools are available, passing
1587	  -fno-optimize-sibling-calls to gcc should prevent gcc generating
1588	  code which hits this problem, at the cost of a bit of extra runtime
1589	  stack usage in some cases.
1590
1591	  The problem is described in more detail at:
1592	      https://bugs.launchpad.net/binutils-linaro/+bug/725126
1593
1594	  Only Thumb-2 kernels are affected.
1595
1596	  Unless you are sure your tools don't have this problem, say Y.
1597
1598config ARM_ASM_UNIFIED
1599	bool
1600
1601config AEABI
1602	bool "Use the ARM EABI to compile the kernel"
1603	help
1604	  This option allows for the kernel to be compiled using the latest
1605	  ARM ABI (aka EABI).  This is only useful if you are using a user
1606	  space environment that is also compiled with EABI.
1607
1608	  Since there are major incompatibilities between the legacy ABI and
1609	  EABI, especially with regard to structure member alignment, this
1610	  option also changes the kernel syscall calling convention to
1611	  disambiguate both ABIs and allow for backward compatibility support
1612	  (selected with CONFIG_OABI_COMPAT).
1613
1614	  To use this you need GCC version 4.0.0 or later.
1615
1616config OABI_COMPAT
1617	bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
1618	depends on AEABI && !THUMB2_KERNEL
1619	help
1620	  This option preserves the old syscall interface along with the
1621	  new (ARM EABI) one. It also provides a compatibility layer to
1622	  intercept syscalls that have structure arguments which layout
1623	  in memory differs between the legacy ABI and the new ARM EABI
1624	  (only for non "thumb" binaries). This option adds a tiny
1625	  overhead to all syscalls and produces a slightly larger kernel.
1626
1627	  The seccomp filter system will not be available when this is
1628	  selected, since there is no way yet to sensibly distinguish
1629	  between calling conventions during filtering.
1630
1631	  If you know you'll be using only pure EABI user space then you
1632	  can say N here. If this option is not selected and you attempt
1633	  to execute a legacy ABI binary then the result will be
1634	  UNPREDICTABLE (in fact it can be predicted that it won't work
1635	  at all). If in doubt say N.
1636
1637config ARCH_HAS_HOLES_MEMORYMODEL
1638	bool
1639
1640config ARCH_SPARSEMEM_ENABLE
1641	bool
1642
1643config ARCH_SPARSEMEM_DEFAULT
1644	def_bool ARCH_SPARSEMEM_ENABLE
1645
1646config ARCH_SELECT_MEMORY_MODEL
1647	def_bool ARCH_SPARSEMEM_ENABLE
1648
1649config HAVE_ARCH_PFN_VALID
1650	def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
1651
1652config HAVE_GENERIC_RCU_GUP
1653	def_bool y
1654	depends on ARM_LPAE
1655
1656config HIGHMEM
1657	bool "High Memory Support"
1658	depends on MMU
1659	help
1660	  The address space of ARM processors is only 4 Gigabytes large
1661	  and it has to accommodate user address space, kernel address
1662	  space as well as some memory mapped IO. That means that, if you
1663	  have a large amount of physical memory and/or IO, not all of the
1664	  memory can be "permanently mapped" by the kernel. The physical
1665	  memory that is not permanently mapped is called "high memory".
1666
1667	  Depending on the selected kernel/user memory split, minimum
1668	  vmalloc space and actual amount of RAM, you may not need this
1669	  option which should result in a slightly faster kernel.
1670
1671	  If unsure, say n.
1672
1673config HIGHPTE
1674	bool "Allocate 2nd-level pagetables from highmem"
1675	depends on HIGHMEM
1676
1677config HW_PERF_EVENTS
1678	bool "Enable hardware performance counter support for perf events"
1679	depends on PERF_EVENTS
1680	default y
1681	help
1682	  Enable hardware performance counter support for perf events. If
1683	  disabled, perf events will use software events only.
1684
1685config SYS_SUPPORTS_HUGETLBFS
1686       def_bool y
1687       depends on ARM_LPAE
1688
1689config HAVE_ARCH_TRANSPARENT_HUGEPAGE
1690       def_bool y
1691       depends on ARM_LPAE
1692
1693config ARCH_WANT_GENERAL_HUGETLB
1694	def_bool y
1695
1696source "mm/Kconfig"
1697
1698config FORCE_MAX_ZONEORDER
1699	int "Maximum zone order" if ARCH_SHMOBILE_LEGACY
1700	range 11 64 if ARCH_SHMOBILE_LEGACY
1701	default "12" if SOC_AM33XX
1702	default "9" if SA1111 || ARCH_EFM32
1703	default "11"
1704	help
1705	  The kernel memory allocator divides physically contiguous memory
1706	  blocks into "zones", where each zone is a power of two number of
1707	  pages.  This option selects the largest power of two that the kernel
1708	  keeps in the memory allocator.  If you need to allocate very large
1709	  blocks of physically contiguous memory, then you may need to
1710	  increase this value.
1711
1712	  This config option is actually maximum order plus one. For example,
1713	  a value of 11 means that the largest free memory block is 2^10 pages.
1714
1715config ALIGNMENT_TRAP
1716	bool
1717	depends on CPU_CP15_MMU
1718	default y if !ARCH_EBSA110
1719	select HAVE_PROC_CPU if PROC_FS
1720	help
1721	  ARM processors cannot fetch/store information which is not
1722	  naturally aligned on the bus, i.e., a 4 byte fetch must start at an
1723	  address divisible by 4. On 32-bit ARM processors, these non-aligned
1724	  fetch/store instructions will be emulated in software if you say
1725	  here, which has a severe performance impact. This is necessary for
1726	  correct operation of some network protocols. With an IP-only
1727	  configuration it is safe to say N, otherwise say Y.
1728
1729config UACCESS_WITH_MEMCPY
1730	bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user()"
1731	depends on MMU
1732	default y if CPU_FEROCEON
1733	help
1734	  Implement faster copy_to_user and clear_user methods for CPU
1735	  cores where a 8-word STM instruction give significantly higher
1736	  memory write throughput than a sequence of individual 32bit stores.
1737
1738	  A possible side effect is a slight increase in scheduling latency
1739	  between threads sharing the same address space if they invoke
1740	  such copy operations with large buffers.
1741
1742	  However, if the CPU data cache is using a write-allocate mode,
1743	  this option is unlikely to provide any performance gain.
1744
1745config SECCOMP
1746	bool
1747	prompt "Enable seccomp to safely compute untrusted bytecode"
1748	---help---
1749	  This kernel feature is useful for number crunching applications
1750	  that may need to compute untrusted bytecode during their
1751	  execution. By using pipes or other transports made available to
1752	  the process as file descriptors supporting the read/write
1753	  syscalls, it's possible to isolate those applications in
1754	  their own address space using seccomp. Once seccomp is
1755	  enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
1756	  and the task is only allowed to execute a few safe syscalls
1757	  defined by each seccomp mode.
1758
1759config SWIOTLB
1760	def_bool y
1761
1762config IOMMU_HELPER
1763	def_bool SWIOTLB
1764
1765config XEN_DOM0
1766	def_bool y
1767	depends on XEN
1768
1769config XEN
1770	bool "Xen guest support on ARM"
1771	depends on ARM && AEABI && OF
1772	depends on CPU_V7 && !CPU_V6
1773	depends on !GENERIC_ATOMIC64
1774	depends on MMU
1775	select ARCH_DMA_ADDR_T_64BIT
1776	select ARM_PSCI
1777	select SWIOTLB_XEN
1778	help
1779	  Say Y if you want to run Linux in a Virtual Machine on Xen on ARM.
1780
1781endmenu
1782
1783menu "Boot options"
1784
1785config USE_OF
1786	bool "Flattened Device Tree support"
1787	select IRQ_DOMAIN
1788	select OF
1789	select OF_EARLY_FLATTREE
1790	select OF_RESERVED_MEM
1791	help
1792	  Include support for flattened device tree machine descriptions.
1793
1794config ATAGS
1795	bool "Support for the traditional ATAGS boot data passing" if USE_OF
1796	default y
1797	help
1798	  This is the traditional way of passing data to the kernel at boot
1799	  time. If you are solely relying on the flattened device tree (or
1800	  the ARM_ATAG_DTB_COMPAT option) then you may unselect this option
1801	  to remove ATAGS support from your kernel binary.  If unsure,
1802	  leave this to y.
1803
1804config DEPRECATED_PARAM_STRUCT
1805	bool "Provide old way to pass kernel parameters"
1806	depends on ATAGS
1807	help
1808	  This was deprecated in 2001 and announced to live on for 5 years.
1809	  Some old boot loaders still use this way.
1810
1811# Compressed boot loader in ROM.  Yes, we really want to ask about
1812# TEXT and BSS so we preserve their values in the config files.
1813config ZBOOT_ROM_TEXT
1814	hex "Compressed ROM boot loader base address"
1815	default "0"
1816	help
1817	  The physical address at which the ROM-able zImage is to be
1818	  placed in the target.  Platforms which normally make use of
1819	  ROM-able zImage formats normally set this to a suitable
1820	  value in their defconfig file.
1821
1822	  If ZBOOT_ROM is not enabled, this has no effect.
1823
1824config ZBOOT_ROM_BSS
1825	hex "Compressed ROM boot loader BSS address"
1826	default "0"
1827	help
1828	  The base address of an area of read/write memory in the target
1829	  for the ROM-able zImage which must be available while the
1830	  decompressor is running. It must be large enough to hold the
1831	  entire decompressed kernel plus an additional 128 KiB.
1832	  Platforms which normally make use of ROM-able zImage formats
1833	  normally set this to a suitable value in their defconfig file.
1834
1835	  If ZBOOT_ROM is not enabled, this has no effect.
1836
1837config ZBOOT_ROM
1838	bool "Compressed boot loader in ROM/flash"
1839	depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
1840	depends on !ARM_APPENDED_DTB && !XIP_KERNEL && !AUTO_ZRELADDR
1841	help
1842	  Say Y here if you intend to execute your compressed kernel image
1843	  (zImage) directly from ROM or flash.  If unsure, say N.
1844
1845choice
1846	prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)"
1847	depends on ZBOOT_ROM && ARCH_SH7372
1848	default ZBOOT_ROM_NONE
1849	help
1850	  Include experimental SD/MMC loading code in the ROM-able zImage.
1851	  With this enabled it is possible to write the ROM-able zImage
1852	  kernel image to an MMC or SD card and boot the kernel straight
1853	  from the reset vector. At reset the processor Mask ROM will load
1854	  the first part of the ROM-able zImage which in turn loads the
1855	  rest the kernel image to RAM.
1856
1857config ZBOOT_ROM_NONE
1858	bool "No SD/MMC loader in zImage (EXPERIMENTAL)"
1859	help
1860	  Do not load image from SD or MMC
1861
1862config ZBOOT_ROM_MMCIF
1863	bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
1864	help
1865	  Load image from MMCIF hardware block.
1866
1867config ZBOOT_ROM_SH_MOBILE_SDHI
1868	bool "Include SuperH Mobile SDHI loader in zImage (EXPERIMENTAL)"
1869	help
1870	  Load image from SDHI hardware block
1871
1872endchoice
1873
1874config ARM_APPENDED_DTB
1875	bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
1876	depends on OF
1877	help
1878	  With this option, the boot code will look for a device tree binary
1879	  (DTB) appended to zImage
1880	  (e.g. cat zImage <filename>.dtb > zImage_w_dtb).
1881
1882	  This is meant as a backward compatibility convenience for those
1883	  systems with a bootloader that can't be upgraded to accommodate
1884	  the documented boot protocol using a device tree.
1885
1886	  Beware that there is very little in terms of protection against
1887	  this option being confused by leftover garbage in memory that might
1888	  look like a DTB header after a reboot if no actual DTB is appended
1889	  to zImage.  Do not leave this option active in a production kernel
1890	  if you don't intend to always append a DTB.  Proper passing of the
1891	  location into r2 of a bootloader provided DTB is always preferable
1892	  to this option.
1893
1894config ARM_ATAG_DTB_COMPAT
1895	bool "Supplement the appended DTB with traditional ATAG information"
1896	depends on ARM_APPENDED_DTB
1897	help
1898	  Some old bootloaders can't be updated to a DTB capable one, yet
1899	  they provide ATAGs with memory configuration, the ramdisk address,
1900	  the kernel cmdline string, etc.  Such information is dynamically
1901	  provided by the bootloader and can't always be stored in a static
1902	  DTB.  To allow a device tree enabled kernel to be used with such
1903	  bootloaders, this option allows zImage to extract the information
1904	  from the ATAG list and store it at run time into the appended DTB.
1905
1906choice
1907	prompt "Kernel command line type" if ARM_ATAG_DTB_COMPAT
1908	default ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
1909
1910config ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
1911	bool "Use bootloader kernel arguments if available"
1912	help
1913	  Uses the command-line options passed by the boot loader instead of
1914	  the device tree bootargs property. If the boot loader doesn't provide
1915	  any, the device tree bootargs property will be used.
1916
1917config ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEND
1918	bool "Extend with bootloader kernel arguments"
1919	help
1920	  The command-line arguments provided by the boot loader will be
1921	  appended to the the device tree bootargs property.
1922
1923endchoice
1924
1925config CMDLINE
1926	string "Default kernel command string"
1927	default ""
1928	help
1929	  On some architectures (EBSA110 and CATS), there is currently no way
1930	  for the boot loader to pass arguments to the kernel. For these
1931	  architectures, you should supply some command-line options at build
1932	  time by entering them here. As a minimum, you should specify the
1933	  memory size and the root device (e.g., mem=64M root=/dev/nfs).
1934
1935choice
1936	prompt "Kernel command line type" if CMDLINE != ""
1937	default CMDLINE_FROM_BOOTLOADER
1938	depends on ATAGS
1939
1940config CMDLINE_FROM_BOOTLOADER
1941	bool "Use bootloader kernel arguments if available"
1942	help
1943	  Uses the command-line options passed by the boot loader. If
1944	  the boot loader doesn't provide any, the default kernel command
1945	  string provided in CMDLINE will be used.
1946
1947config CMDLINE_EXTEND
1948	bool "Extend bootloader kernel arguments"
1949	help
1950	  The command-line arguments provided by the boot loader will be
1951	  appended to the default kernel command string.
1952
1953config CMDLINE_FORCE
1954	bool "Always use the default kernel command string"
1955	help
1956	  Always use the default kernel command string, even if the boot
1957	  loader passes other arguments to the kernel.
1958	  This is useful if you cannot or don't want to change the
1959	  command-line options your boot loader passes to the kernel.
1960endchoice
1961
1962config XIP_KERNEL
1963	bool "Kernel Execute-In-Place from ROM"
1964	depends on !ARM_LPAE && !ARCH_MULTIPLATFORM
1965	help
1966	  Execute-In-Place allows the kernel to run from non-volatile storage
1967	  directly addressable by the CPU, such as NOR flash. This saves RAM
1968	  space since the text section of the kernel is not loaded from flash
1969	  to RAM.  Read-write sections, such as the data section and stack,
1970	  are still copied to RAM.  The XIP kernel is not compressed since
1971	  it has to run directly from flash, so it will take more space to
1972	  store it.  The flash address used to link the kernel object files,
1973	  and for storing it, is configuration dependent. Therefore, if you
1974	  say Y here, you must know the proper physical address where to
1975	  store the kernel image depending on your own flash memory usage.
1976
1977	  Also note that the make target becomes "make xipImage" rather than
1978	  "make zImage" or "make Image".  The final kernel binary to put in
1979	  ROM memory will be arch/arm/boot/xipImage.
1980
1981	  If unsure, say N.
1982
1983config XIP_PHYS_ADDR
1984	hex "XIP Kernel Physical Location"
1985	depends on XIP_KERNEL
1986	default "0x00080000"
1987	help
1988	  This is the physical address in your flash memory the kernel will
1989	  be linked for and stored to.  This address is dependent on your
1990	  own flash usage.
1991
1992config KEXEC
1993	bool "Kexec system call (EXPERIMENTAL)"
1994	depends on (!SMP || PM_SLEEP_SMP)
1995	help
1996	  kexec is a system call that implements the ability to shutdown your
1997	  current kernel, and to start another kernel.  It is like a reboot
1998	  but it is independent of the system firmware.   And like a reboot
1999	  you can start any kernel with it, not just Linux.
2000
2001	  It is an ongoing process to be certain the hardware in a machine
2002	  is properly shutdown, so do not be surprised if this code does not
2003	  initially work for you.
2004
2005config ATAGS_PROC
2006	bool "Export atags in procfs"
2007	depends on ATAGS && KEXEC
2008	default y
2009	help
2010	  Should the atags used to boot the kernel be exported in an "atags"
2011	  file in procfs. Useful with kexec.
2012
2013config CRASH_DUMP
2014	bool "Build kdump crash kernel (EXPERIMENTAL)"
2015	help
2016	  Generate crash dump after being started by kexec. This should
2017	  be normally only set in special crash dump kernels which are
2018	  loaded in the main kernel with kexec-tools into a specially
2019	  reserved region and then later executed after a crash by
2020	  kdump/kexec. The crash dump kernel must be compiled to a
2021	  memory address not used by the main kernel
2022
2023	  For more details see Documentation/kdump/kdump.txt
2024
2025config AUTO_ZRELADDR
2026	bool "Auto calculation of the decompressed kernel image address"
2027	help
2028	  ZRELADDR is the physical address where the decompressed kernel
2029	  image will be placed. If AUTO_ZRELADDR is selected, the address
2030	  will be determined at run-time by masking the current IP with
2031	  0xf8000000. This assumes the zImage being placed in the first 128MB
2032	  from start of memory.
2033
2034endmenu
2035
2036menu "CPU Power Management"
2037
2038source "drivers/cpufreq/Kconfig"
2039
2040source "drivers/cpuidle/Kconfig"
2041
2042endmenu
2043
2044menu "Floating point emulation"
2045
2046comment "At least one emulation must be selected"
2047
2048config FPE_NWFPE
2049	bool "NWFPE math emulation"
2050	depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
2051	---help---
2052	  Say Y to include the NWFPE floating point emulator in the kernel.
2053	  This is necessary to run most binaries. Linux does not currently
2054	  support floating point hardware so you need to say Y here even if
2055	  your machine has an FPA or floating point co-processor podule.
2056
2057	  You may say N here if you are going to load the Acorn FPEmulator
2058	  early in the bootup.
2059
2060config FPE_NWFPE_XP
2061	bool "Support extended precision"
2062	depends on FPE_NWFPE
2063	help
2064	  Say Y to include 80-bit support in the kernel floating-point
2065	  emulator.  Otherwise, only 32 and 64-bit support is compiled in.
2066	  Note that gcc does not generate 80-bit operations by default,
2067	  so in most cases this option only enlarges the size of the
2068	  floating point emulator without any good reason.
2069
2070	  You almost surely want to say N here.
2071
2072config FPE_FASTFPE
2073	bool "FastFPE math emulation (EXPERIMENTAL)"
2074	depends on (!AEABI || OABI_COMPAT) && !CPU_32v3
2075	---help---
2076	  Say Y here to include the FAST floating point emulator in the kernel.
2077	  This is an experimental much faster emulator which now also has full
2078	  precision for the mantissa.  It does not support any exceptions.
2079	  It is very simple, and approximately 3-6 times faster than NWFPE.
2080
2081	  It should be sufficient for most programs.  It may be not suitable
2082	  for scientific calculations, but you have to check this for yourself.
2083	  If you do not feel you need a faster FP emulation you should better
2084	  choose NWFPE.
2085
2086config VFP
2087	bool "VFP-format floating point maths"
2088	depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
2089	help
2090	  Say Y to include VFP support code in the kernel. This is needed
2091	  if your hardware includes a VFP unit.
2092
2093	  Please see <file:Documentation/arm/VFP/release-notes.txt> for
2094	  release notes and additional status information.
2095
2096	  Say N if your target does not have VFP hardware.
2097
2098config VFPv3
2099	bool
2100	depends on VFP
2101	default y if CPU_V7
2102
2103config NEON
2104	bool "Advanced SIMD (NEON) Extension support"
2105	depends on VFPv3 && CPU_V7
2106	help
2107	  Say Y to include support code for NEON, the ARMv7 Advanced SIMD
2108	  Extension.
2109
2110config KERNEL_MODE_NEON
2111	bool "Support for NEON in kernel mode"
2112	depends on NEON && AEABI
2113	help
2114	  Say Y to include support for NEON in kernel mode.
2115
2116endmenu
2117
2118menu "Userspace binary formats"
2119
2120source "fs/Kconfig.binfmt"
2121
2122config ARTHUR
2123	tristate "RISC OS personality"
2124	depends on !AEABI
2125	help
2126	  Say Y here to include the kernel code necessary if you want to run
2127	  Acorn RISC OS/Arthur binaries under Linux. This code is still very
2128	  experimental; if this sounds frightening, say N and sleep in peace.
2129	  You can also say M here to compile this support as a module (which
2130	  will be called arthur).
2131
2132endmenu
2133
2134menu "Power management options"
2135
2136source "kernel/power/Kconfig"
2137
2138config ARCH_SUSPEND_POSSIBLE
2139	depends on CPU_ARM920T || CPU_ARM926T || CPU_FEROCEON || CPU_SA1100 || \
2140		CPU_V6 || CPU_V6K || CPU_V7 || CPU_V7M || CPU_XSC3 || CPU_XSCALE || CPU_MOHAWK
2141	def_bool y
2142
2143config ARM_CPU_SUSPEND
2144	def_bool PM_SLEEP
2145
2146config ARCH_HIBERNATION_POSSIBLE
2147	bool
2148	depends on MMU
2149	default y if ARCH_SUSPEND_POSSIBLE
2150
2151endmenu
2152
2153source "net/Kconfig"
2154
2155source "drivers/Kconfig"
2156
2157source "fs/Kconfig"
2158
2159source "arch/arm/Kconfig.debug"
2160
2161source "security/Kconfig"
2162
2163source "crypto/Kconfig"
2164
2165source "lib/Kconfig"
2166
2167source "arch/arm/kvm/Kconfig"
2168