xref: /linux/arch/arm/Kconfig (revision d346a5db02fc16263b44eb511fcb260265e3ef77)
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_HAVE_CUSTOM_GPIO_H
7	select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
8	select ARCH_WANT_IPC_PARSE_VERSION
9	select BUILDTIME_EXTABLE_SORT if MMU
10	select CPU_PM if (SUSPEND || CPU_IDLE)
11	select DCACHE_WORD_ACCESS if (CPU_V6 || CPU_V6K || CPU_V7) && !CPU_BIG_ENDIAN && MMU
12	select GENERIC_ATOMIC64 if (CPU_V6 || !CPU_32v6K || !AEABI)
13	select GENERIC_CLOCKEVENTS_BROADCAST if SMP
14	select GENERIC_IRQ_PROBE
15	select GENERIC_IRQ_SHOW
16	select GENERIC_PCI_IOMAP
17	select GENERIC_SMP_IDLE_THREAD
18	select GENERIC_IDLE_POLL_SETUP
19	select GENERIC_STRNCPY_FROM_USER
20	select GENERIC_STRNLEN_USER
21	select HARDIRQS_SW_RESEND
22	select HAVE_AOUT
23	select HAVE_ARCH_JUMP_LABEL if !XIP_KERNEL
24	select HAVE_ARCH_KGDB
25	select HAVE_ARCH_SECCOMP_FILTER
26	select HAVE_ARCH_TRACEHOOK
27	select HAVE_BPF_JIT
28	select HAVE_C_RECORDMCOUNT
29	select HAVE_DEBUG_KMEMLEAK
30	select HAVE_DMA_API_DEBUG
31	select HAVE_DMA_ATTRS
32	select HAVE_DMA_CONTIGUOUS if MMU
33	select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL)
34	select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
35	select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL)
36	select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
37	select HAVE_GENERIC_DMA_COHERENT
38	select HAVE_GENERIC_HARDIRQS
39	select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7))
40	select HAVE_IDE if PCI || ISA || PCMCIA
41	select HAVE_IRQ_TIME_ACCOUNTING
42	select HAVE_KERNEL_GZIP
43	select HAVE_KERNEL_LZMA
44	select HAVE_KERNEL_LZO
45	select HAVE_KERNEL_XZ
46	select HAVE_KPROBES if !XIP_KERNEL
47	select HAVE_KRETPROBES if (HAVE_KPROBES)
48	select HAVE_MEMBLOCK
49	select HAVE_OPROFILE if (HAVE_PERF_EVENTS)
50	select HAVE_PERF_EVENTS
51	select HAVE_REGS_AND_STACK_ACCESS_API
52	select HAVE_SYSCALL_TRACEPOINTS
53	select HAVE_UID16
54	select KTIME_SCALAR
55	select PERF_USE_VMALLOC
56	select RTC_LIB
57	select SYS_SUPPORTS_APM_EMULATION
58	select HAVE_MOD_ARCH_SPECIFIC if ARM_UNWIND
59	select MODULES_USE_ELF_REL
60	select CLONE_BACKWARDS
61	select OLD_SIGSUSPEND3
62	select OLD_SIGACTION
63	select HAVE_CONTEXT_TRACKING
64	help
65	  The ARM series is a line of low-power-consumption RISC chip designs
66	  licensed by ARM Ltd and targeted at embedded applications and
67	  handhelds such as the Compaq IPAQ.  ARM-based PCs are no longer
68	  manufactured, but legacy ARM-based PC hardware remains popular in
69	  Europe.  There is an ARM Linux project with a web page at
70	  <http://www.arm.linux.org.uk/>.
71
72config ARM_HAS_SG_CHAIN
73	bool
74
75config NEED_SG_DMA_LENGTH
76	bool
77
78config ARM_DMA_USE_IOMMU
79	bool
80	select ARM_HAS_SG_CHAIN
81	select NEED_SG_DMA_LENGTH
82
83if ARM_DMA_USE_IOMMU
84
85config ARM_DMA_IOMMU_ALIGNMENT
86	int "Maximum PAGE_SIZE order of alignment for DMA IOMMU buffers"
87	range 4 9
88	default 8
89	help
90	  DMA mapping framework by default aligns all buffers to the smallest
91	  PAGE_SIZE order which is greater than or equal to the requested buffer
92	  size. This works well for buffers up to a few hundreds kilobytes, but
93	  for larger buffers it just a waste of address space. Drivers which has
94	  relatively small addressing window (like 64Mib) might run out of
95	  virtual space with just a few allocations.
96
97	  With this parameter you can specify the maximum PAGE_SIZE order for
98	  DMA IOMMU buffers. Larger buffers will be aligned only to this
99	  specified order. The order is expressed as a power of two multiplied
100	  by the PAGE_SIZE.
101
102endif
103
104config HAVE_PWM
105	bool
106
107config MIGHT_HAVE_PCI
108	bool
109
110config SYS_SUPPORTS_APM_EMULATION
111	bool
112
113config HAVE_TCM
114	bool
115	select GENERIC_ALLOCATOR
116
117config HAVE_PROC_CPU
118	bool
119
120config NO_IOPORT
121	bool
122
123config EISA
124	bool
125	---help---
126	  The Extended Industry Standard Architecture (EISA) bus was
127	  developed as an open alternative to the IBM MicroChannel bus.
128
129	  The EISA bus provided some of the features of the IBM MicroChannel
130	  bus while maintaining backward compatibility with cards made for
131	  the older ISA bus.  The EISA bus saw limited use between 1988 and
132	  1995 when it was made obsolete by the PCI bus.
133
134	  Say Y here if you are building a kernel for an EISA-based machine.
135
136	  Otherwise, say N.
137
138config SBUS
139	bool
140
141config STACKTRACE_SUPPORT
142	bool
143	default y
144
145config HAVE_LATENCYTOP_SUPPORT
146	bool
147	depends on !SMP
148	default y
149
150config LOCKDEP_SUPPORT
151	bool
152	default y
153
154config TRACE_IRQFLAGS_SUPPORT
155	bool
156	default y
157
158config RWSEM_GENERIC_SPINLOCK
159	bool
160	default y
161
162config RWSEM_XCHGADD_ALGORITHM
163	bool
164
165config ARCH_HAS_ILOG2_U32
166	bool
167
168config ARCH_HAS_ILOG2_U64
169	bool
170
171config ARCH_HAS_CPUFREQ
172	bool
173	help
174	  Internal node to signify that the ARCH has CPUFREQ support
175	  and that the relevant menu configurations are displayed for
176	  it.
177
178config GENERIC_HWEIGHT
179	bool
180	default y
181
182config GENERIC_CALIBRATE_DELAY
183	bool
184	default y
185
186config ARCH_MAY_HAVE_PC_FDC
187	bool
188
189config ZONE_DMA
190	bool
191
192config NEED_DMA_MAP_STATE
193       def_bool y
194
195config ARCH_HAS_DMA_SET_COHERENT_MASK
196	bool
197
198config GENERIC_ISA_DMA
199	bool
200
201config FIQ
202	bool
203
204config NEED_RET_TO_USER
205	bool
206
207config ARCH_MTD_XIP
208	bool
209
210config VECTORS_BASE
211	hex
212	default 0xffff0000 if MMU || CPU_HIGH_VECTOR
213	default DRAM_BASE if REMAP_VECTORS_TO_RAM
214	default 0x00000000
215	help
216	  The base address of exception vectors.
217
218config ARM_PATCH_PHYS_VIRT
219	bool "Patch physical to virtual translations at runtime" if EMBEDDED
220	default y
221	depends on !XIP_KERNEL && MMU
222	depends on !ARCH_REALVIEW || !SPARSEMEM
223	help
224	  Patch phys-to-virt and virt-to-phys translation functions at
225	  boot and module load time according to the position of the
226	  kernel in system memory.
227
228	  This can only be used with non-XIP MMU kernels where the base
229	  of physical memory is at a 16MB boundary.
230
231	  Only disable this option if you know that you do not require
232	  this feature (eg, building a kernel for a single machine) and
233	  you need to shrink the kernel to the minimal size.
234
235config NEED_MACH_GPIO_H
236	bool
237	help
238	  Select this when mach/gpio.h is required to provide special
239	  definitions for this platform. The need for mach/gpio.h should
240	  be avoided when possible.
241
242config NEED_MACH_IO_H
243	bool
244	help
245	  Select this when mach/io.h is required to provide special
246	  definitions for this platform.  The need for mach/io.h should
247	  be avoided when possible.
248
249config NEED_MACH_MEMORY_H
250	bool
251	help
252	  Select this when mach/memory.h is required to provide special
253	  definitions for this platform.  The need for mach/memory.h should
254	  be avoided when possible.
255
256config PHYS_OFFSET
257	hex "Physical address of main memory" if MMU
258	depends on !ARM_PATCH_PHYS_VIRT && !NEED_MACH_MEMORY_H
259	default DRAM_BASE if !MMU
260	help
261	  Please provide the physical address corresponding to the
262	  location of main memory in your system.
263
264config GENERIC_BUG
265	def_bool y
266	depends on BUG
267
268source "init/Kconfig"
269
270source "kernel/Kconfig.freezer"
271
272menu "System Type"
273
274config MMU
275	bool "MMU-based Paged Memory Management Support"
276	default y
277	help
278	  Select if you want MMU-based virtualised addressing space
279	  support by paged memory management. If unsure, say 'Y'.
280
281#
282# The "ARM system type" choice list is ordered alphabetically by option
283# text.  Please add new entries in the option alphabetic order.
284#
285choice
286	prompt "ARM system type"
287	default ARCH_VERSATILE if !MMU
288	default ARCH_MULTIPLATFORM if MMU
289
290config ARCH_MULTIPLATFORM
291	bool "Allow multiple platforms to be selected"
292	depends on MMU
293	select ARM_PATCH_PHYS_VIRT
294	select AUTO_ZRELADDR
295	select COMMON_CLK
296	select MULTI_IRQ_HANDLER
297	select SPARSE_IRQ
298	select USE_OF
299
300config ARCH_INTEGRATOR
301	bool "ARM Ltd. Integrator family"
302	select ARCH_HAS_CPUFREQ
303	select ARM_AMBA
304	select COMMON_CLK
305	select COMMON_CLK_VERSATILE
306	select GENERIC_CLOCKEVENTS
307	select HAVE_TCM
308	select ICST
309	select MULTI_IRQ_HANDLER
310	select NEED_MACH_MEMORY_H
311	select PLAT_VERSATILE
312	select SPARSE_IRQ
313	select VERSATILE_FPGA_IRQ
314	help
315	  Support for ARM's Integrator platform.
316
317config ARCH_REALVIEW
318	bool "ARM Ltd. RealView family"
319	select ARCH_WANT_OPTIONAL_GPIOLIB
320	select ARM_AMBA
321	select ARM_TIMER_SP804
322	select COMMON_CLK
323	select COMMON_CLK_VERSATILE
324	select GENERIC_CLOCKEVENTS
325	select GPIO_PL061 if GPIOLIB
326	select ICST
327	select NEED_MACH_MEMORY_H
328	select PLAT_VERSATILE
329	select PLAT_VERSATILE_CLCD
330	help
331	  This enables support for ARM Ltd RealView boards.
332
333config ARCH_VERSATILE
334	bool "ARM Ltd. Versatile family"
335	select ARCH_WANT_OPTIONAL_GPIOLIB
336	select ARM_AMBA
337	select ARM_TIMER_SP804
338	select ARM_VIC
339	select CLKDEV_LOOKUP
340	select GENERIC_CLOCKEVENTS
341	select HAVE_MACH_CLKDEV
342	select ICST
343	select PLAT_VERSATILE
344	select PLAT_VERSATILE_CLCD
345	select PLAT_VERSATILE_CLOCK
346	select VERSATILE_FPGA_IRQ
347	help
348	  This enables support for ARM Ltd Versatile board.
349
350config ARCH_AT91
351	bool "Atmel AT91"
352	select ARCH_REQUIRE_GPIOLIB
353	select CLKDEV_LOOKUP
354	select HAVE_CLK
355	select IRQ_DOMAIN
356	select NEED_MACH_GPIO_H
357	select NEED_MACH_IO_H if PCCARD
358	select PINCTRL
359	select PINCTRL_AT91 if USE_OF
360	help
361	  This enables support for systems based on Atmel
362	  AT91RM9200 and AT91SAM9* processors.
363
364config ARCH_CLPS711X
365	bool "Cirrus Logic CLPS711x/EP721x/EP731x-based"
366	select ARCH_REQUIRE_GPIOLIB
367	select AUTO_ZRELADDR
368	select CLKDEV_LOOKUP
369	select COMMON_CLK
370	select CPU_ARM720T
371	select GENERIC_CLOCKEVENTS
372	select MULTI_IRQ_HANDLER
373	select NEED_MACH_MEMORY_H
374	select SPARSE_IRQ
375	help
376	  Support for Cirrus Logic 711x/721x/731x based boards.
377
378config ARCH_GEMINI
379	bool "Cortina Systems Gemini"
380	select ARCH_REQUIRE_GPIOLIB
381	select ARCH_USES_GETTIMEOFFSET
382	select NEED_MACH_GPIO_H
383	select CPU_FA526
384	help
385	  Support for the Cortina Systems Gemini family SoCs
386
387config ARCH_EBSA110
388	bool "EBSA-110"
389	select ARCH_USES_GETTIMEOFFSET
390	select CPU_SA110
391	select ISA
392	select NEED_MACH_IO_H
393	select NEED_MACH_MEMORY_H
394	select NO_IOPORT
395	help
396	  This is an evaluation board for the StrongARM processor available
397	  from Digital. It has limited hardware on-board, including an
398	  Ethernet interface, two PCMCIA sockets, two serial ports and a
399	  parallel port.
400
401config ARCH_EP93XX
402	bool "EP93xx-based"
403	select ARCH_HAS_HOLES_MEMORYMODEL
404	select ARCH_REQUIRE_GPIOLIB
405	select ARCH_USES_GETTIMEOFFSET
406	select ARM_AMBA
407	select ARM_VIC
408	select CLKDEV_LOOKUP
409	select CPU_ARM920T
410	select NEED_MACH_MEMORY_H
411	help
412	  This enables support for the Cirrus EP93xx series of CPUs.
413
414config ARCH_FOOTBRIDGE
415	bool "FootBridge"
416	select CPU_SA110
417	select FOOTBRIDGE
418	select GENERIC_CLOCKEVENTS
419	select HAVE_IDE
420	select NEED_MACH_IO_H if !MMU
421	select NEED_MACH_MEMORY_H
422	help
423	  Support for systems based on the DC21285 companion chip
424	  ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
425
426config ARCH_NETX
427	bool "Hilscher NetX based"
428	select ARM_VIC
429	select CLKSRC_MMIO
430	select CPU_ARM926T
431	select GENERIC_CLOCKEVENTS
432	help
433	  This enables support for systems based on the Hilscher NetX Soc
434
435config ARCH_IOP13XX
436	bool "IOP13xx-based"
437	depends on MMU
438	select ARCH_SUPPORTS_MSI
439	select CPU_XSC3
440	select NEED_MACH_MEMORY_H
441	select NEED_RET_TO_USER
442	select PCI
443	select PLAT_IOP
444	select VMSPLIT_1G
445	help
446	  Support for Intel's IOP13XX (XScale) family of processors.
447
448config ARCH_IOP32X
449	bool "IOP32x-based"
450	depends on MMU
451	select ARCH_REQUIRE_GPIOLIB
452	select CPU_XSCALE
453	select NEED_MACH_GPIO_H
454	select NEED_RET_TO_USER
455	select PCI
456	select PLAT_IOP
457	help
458	  Support for Intel's 80219 and IOP32X (XScale) family of
459	  processors.
460
461config ARCH_IOP33X
462	bool "IOP33x-based"
463	depends on MMU
464	select ARCH_REQUIRE_GPIOLIB
465	select CPU_XSCALE
466	select NEED_MACH_GPIO_H
467	select NEED_RET_TO_USER
468	select PCI
469	select PLAT_IOP
470	help
471	  Support for Intel's IOP33X (XScale) family of processors.
472
473config ARCH_IXP4XX
474	bool "IXP4xx-based"
475	depends on MMU
476	select ARCH_HAS_DMA_SET_COHERENT_MASK
477	select ARCH_REQUIRE_GPIOLIB
478	select CLKSRC_MMIO
479	select CPU_XSCALE
480	select DMABOUNCE if PCI
481	select GENERIC_CLOCKEVENTS
482	select MIGHT_HAVE_PCI
483	select NEED_MACH_IO_H
484	select USB_EHCI_BIG_ENDIAN_MMIO
485	select USB_EHCI_BIG_ENDIAN_DESC
486	help
487	  Support for Intel's IXP4XX (XScale) family of processors.
488
489config ARCH_DOVE
490	bool "Marvell Dove"
491	select ARCH_REQUIRE_GPIOLIB
492	select CPU_PJ4
493	select GENERIC_CLOCKEVENTS
494	select MIGHT_HAVE_PCI
495	select PINCTRL
496	select PINCTRL_DOVE
497	select PLAT_ORION_LEGACY
498	select USB_ARCH_HAS_EHCI
499	select MVEBU_MBUS
500	help
501	  Support for the Marvell Dove SoC 88AP510
502
503config ARCH_KIRKWOOD
504	bool "Marvell Kirkwood"
505	select ARCH_REQUIRE_GPIOLIB
506	select CPU_FEROCEON
507	select GENERIC_CLOCKEVENTS
508	select PCI
509	select PCI_QUIRKS
510	select PINCTRL
511	select PINCTRL_KIRKWOOD
512	select PLAT_ORION_LEGACY
513	select MVEBU_MBUS
514	help
515	  Support for the following Marvell Kirkwood series SoCs:
516	  88F6180, 88F6192 and 88F6281.
517
518config ARCH_MV78XX0
519	bool "Marvell MV78xx0"
520	select ARCH_REQUIRE_GPIOLIB
521	select CPU_FEROCEON
522	select GENERIC_CLOCKEVENTS
523	select PCI
524	select PLAT_ORION_LEGACY
525	select MVEBU_MBUS
526	help
527	  Support for the following Marvell MV78xx0 series SoCs:
528	  MV781x0, MV782x0.
529
530config ARCH_ORION5X
531	bool "Marvell Orion"
532	depends on MMU
533	select ARCH_REQUIRE_GPIOLIB
534	select CPU_FEROCEON
535	select GENERIC_CLOCKEVENTS
536	select PCI
537	select PLAT_ORION_LEGACY
538	select MVEBU_MBUS
539	help
540	  Support for the following Marvell Orion 5x series SoCs:
541	  Orion-1 (5181), Orion-VoIP (5181L), Orion-NAS (5182),
542	  Orion-2 (5281), Orion-1-90 (6183).
543
544config ARCH_MMP
545	bool "Marvell PXA168/910/MMP2"
546	depends on MMU
547	select ARCH_REQUIRE_GPIOLIB
548	select CLKDEV_LOOKUP
549	select GENERIC_ALLOCATOR
550	select GENERIC_CLOCKEVENTS
551	select GPIO_PXA
552	select IRQ_DOMAIN
553	select NEED_MACH_GPIO_H
554	select PINCTRL
555	select PLAT_PXA
556	select SPARSE_IRQ
557	help
558	  Support for Marvell's PXA168/PXA910(MMP) and MMP2 processor line.
559
560config ARCH_KS8695
561	bool "Micrel/Kendin KS8695"
562	select ARCH_REQUIRE_GPIOLIB
563	select CLKSRC_MMIO
564	select CPU_ARM922T
565	select GENERIC_CLOCKEVENTS
566	select NEED_MACH_MEMORY_H
567	help
568	  Support for Micrel/Kendin KS8695 "Centaur" (ARM922T) based
569	  System-on-Chip devices.
570
571config ARCH_W90X900
572	bool "Nuvoton W90X900 CPU"
573	select ARCH_REQUIRE_GPIOLIB
574	select CLKDEV_LOOKUP
575	select CLKSRC_MMIO
576	select CPU_ARM926T
577	select GENERIC_CLOCKEVENTS
578	help
579	  Support for Nuvoton (Winbond logic dept.) ARM9 processor,
580	  At present, the w90x900 has been renamed nuc900, regarding
581	  the ARM series product line, you can login the following
582	  link address to know more.
583
584	  <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
585		ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
586
587config ARCH_LPC32XX
588	bool "NXP LPC32XX"
589	select ARCH_REQUIRE_GPIOLIB
590	select ARM_AMBA
591	select CLKDEV_LOOKUP
592	select CLKSRC_MMIO
593	select CPU_ARM926T
594	select GENERIC_CLOCKEVENTS
595	select HAVE_IDE
596	select HAVE_PWM
597	select USB_ARCH_HAS_OHCI
598	select USE_OF
599	help
600	  Support for the NXP LPC32XX family of processors
601
602config ARCH_PXA
603	bool "PXA2xx/PXA3xx-based"
604	depends on MMU
605	select ARCH_HAS_CPUFREQ
606	select ARCH_MTD_XIP
607	select ARCH_REQUIRE_GPIOLIB
608	select ARM_CPU_SUSPEND if PM
609	select AUTO_ZRELADDR
610	select CLKDEV_LOOKUP
611	select CLKSRC_MMIO
612	select GENERIC_CLOCKEVENTS
613	select GPIO_PXA
614	select HAVE_IDE
615	select MULTI_IRQ_HANDLER
616	select NEED_MACH_GPIO_H
617	select PLAT_PXA
618	select SPARSE_IRQ
619	help
620	  Support for Intel/Marvell's PXA2xx/PXA3xx processor line.
621
622config ARCH_MSM
623	bool "Qualcomm MSM"
624	select ARCH_REQUIRE_GPIOLIB
625	select CLKDEV_LOOKUP
626	select GENERIC_CLOCKEVENTS
627	select HAVE_CLK
628	help
629	  Support for Qualcomm MSM/QSD based systems.  This runs on the
630	  apps processor of the MSM/QSD and depends on a shared memory
631	  interface to the modem processor which runs the baseband
632	  stack and controls some vital subsystems
633	  (clock and power control, etc).
634
635config ARCH_SHMOBILE
636	bool "Renesas SH-Mobile / R-Mobile"
637	select CLKDEV_LOOKUP
638	select GENERIC_CLOCKEVENTS
639	select HAVE_ARM_SCU if SMP
640	select HAVE_ARM_TWD if LOCAL_TIMERS
641	select HAVE_CLK
642	select HAVE_MACH_CLKDEV
643	select HAVE_SMP
644	select MIGHT_HAVE_CACHE_L2X0
645	select MULTI_IRQ_HANDLER
646	select NEED_MACH_MEMORY_H
647	select NO_IOPORT
648	select PINCTRL if ARCH_WANT_OPTIONAL_GPIOLIB
649	select PM_GENERIC_DOMAINS if PM
650	select SPARSE_IRQ
651	help
652	  Support for Renesas's SH-Mobile and R-Mobile ARM platforms.
653
654config ARCH_RPC
655	bool "RiscPC"
656	select ARCH_ACORN
657	select ARCH_MAY_HAVE_PC_FDC
658	select ARCH_SPARSEMEM_ENABLE
659	select ARCH_USES_GETTIMEOFFSET
660	select FIQ
661	select HAVE_IDE
662	select HAVE_PATA_PLATFORM
663	select ISA_DMA_API
664	select NEED_MACH_IO_H
665	select NEED_MACH_MEMORY_H
666	select NO_IOPORT
667	select VIRT_TO_BUS
668	help
669	  On the Acorn Risc-PC, Linux can support the internal IDE disk and
670	  CD-ROM interface, serial and parallel port, and the floppy drive.
671
672config ARCH_SA1100
673	bool "SA1100-based"
674	select ARCH_HAS_CPUFREQ
675	select ARCH_MTD_XIP
676	select ARCH_REQUIRE_GPIOLIB
677	select ARCH_SPARSEMEM_ENABLE
678	select CLKDEV_LOOKUP
679	select CLKSRC_MMIO
680	select CPU_FREQ
681	select CPU_SA1100
682	select GENERIC_CLOCKEVENTS
683	select HAVE_IDE
684	select ISA
685	select NEED_MACH_GPIO_H
686	select NEED_MACH_MEMORY_H
687	select SPARSE_IRQ
688	help
689	  Support for StrongARM 11x0 based boards.
690
691config ARCH_S3C24XX
692	bool "Samsung S3C24XX SoCs"
693	select ARCH_HAS_CPUFREQ
694	select ARCH_REQUIRE_GPIOLIB
695	select CLKDEV_LOOKUP
696	select CLKSRC_MMIO
697	select GENERIC_CLOCKEVENTS
698	select HAVE_CLK
699	select HAVE_S3C2410_I2C if I2C
700	select HAVE_S3C2410_WATCHDOG if WATCHDOG
701	select HAVE_S3C_RTC if RTC_CLASS
702	select MULTI_IRQ_HANDLER
703	select NEED_MACH_GPIO_H
704	select NEED_MACH_IO_H
705	help
706	  Samsung S3C2410, S3C2412, S3C2413, S3C2416, S3C2440, S3C2442, S3C2443
707	  and S3C2450 SoCs based systems, such as the Simtec Electronics BAST
708	  (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or the
709	  Samsung SMDK2410 development board (and derivatives).
710
711config ARCH_S3C64XX
712	bool "Samsung S3C64XX"
713	select ARCH_HAS_CPUFREQ
714	select ARCH_REQUIRE_GPIOLIB
715	select ARM_VIC
716	select CLKDEV_LOOKUP
717	select CLKSRC_MMIO
718	select CPU_V6
719	select GENERIC_CLOCKEVENTS
720	select HAVE_CLK
721	select HAVE_S3C2410_I2C if I2C
722	select HAVE_S3C2410_WATCHDOG if WATCHDOG
723	select HAVE_TCM
724	select NEED_MACH_GPIO_H
725	select NO_IOPORT
726	select PLAT_SAMSUNG
727	select S3C_DEV_NAND
728	select S3C_GPIO_TRACK
729	select SAMSUNG_CLKSRC
730	select SAMSUNG_GPIOLIB_4BIT
731	select SAMSUNG_IRQ_VIC_TIMER
732	select USB_ARCH_HAS_OHCI
733	help
734	  Samsung S3C64XX series based systems
735
736config ARCH_S5P64X0
737	bool "Samsung S5P6440 S5P6450"
738	select CLKDEV_LOOKUP
739	select CLKSRC_MMIO
740	select CPU_V6
741	select GENERIC_CLOCKEVENTS
742	select HAVE_CLK
743	select HAVE_S3C2410_I2C if I2C
744	select HAVE_S3C2410_WATCHDOG if WATCHDOG
745	select HAVE_S3C_RTC if RTC_CLASS
746	select NEED_MACH_GPIO_H
747	help
748	  Samsung S5P64X0 CPU based systems, such as the Samsung SMDK6440,
749	  SMDK6450.
750
751config ARCH_S5PC100
752	bool "Samsung S5PC100"
753	select ARCH_REQUIRE_GPIOLIB
754	select CLKDEV_LOOKUP
755	select CLKSRC_MMIO
756	select CPU_V7
757	select GENERIC_CLOCKEVENTS
758	select HAVE_CLK
759	select HAVE_S3C2410_I2C if I2C
760	select HAVE_S3C2410_WATCHDOG if WATCHDOG
761	select HAVE_S3C_RTC if RTC_CLASS
762	select NEED_MACH_GPIO_H
763	help
764	  Samsung S5PC100 series based systems
765
766config ARCH_S5PV210
767	bool "Samsung S5PV210/S5PC110"
768	select ARCH_HAS_CPUFREQ
769	select ARCH_HAS_HOLES_MEMORYMODEL
770	select ARCH_SPARSEMEM_ENABLE
771	select CLKDEV_LOOKUP
772	select CLKSRC_MMIO
773	select CPU_V7
774	select GENERIC_CLOCKEVENTS
775	select HAVE_CLK
776	select HAVE_S3C2410_I2C if I2C
777	select HAVE_S3C2410_WATCHDOG if WATCHDOG
778	select HAVE_S3C_RTC if RTC_CLASS
779	select NEED_MACH_GPIO_H
780	select NEED_MACH_MEMORY_H
781	help
782	  Samsung S5PV210/S5PC110 series based systems
783
784config ARCH_EXYNOS
785	bool "Samsung EXYNOS"
786	select ARCH_HAS_CPUFREQ
787	select ARCH_HAS_HOLES_MEMORYMODEL
788	select ARCH_SPARSEMEM_ENABLE
789	select CLKDEV_LOOKUP
790	select COMMON_CLK
791	select CPU_V7
792	select GENERIC_CLOCKEVENTS
793	select HAVE_CLK
794	select HAVE_S3C2410_I2C if I2C
795	select HAVE_S3C2410_WATCHDOG if WATCHDOG
796	select HAVE_S3C_RTC if RTC_CLASS
797	select NEED_MACH_GPIO_H
798	select NEED_MACH_MEMORY_H
799	help
800	  Support for SAMSUNG's EXYNOS SoCs (EXYNOS4/5)
801
802config ARCH_SHARK
803	bool "Shark"
804	select ARCH_USES_GETTIMEOFFSET
805	select CPU_SA110
806	select ISA
807	select ISA_DMA
808	select NEED_MACH_MEMORY_H
809	select PCI
810	select VIRT_TO_BUS
811	select ZONE_DMA
812	help
813	  Support for the StrongARM based Digital DNARD machine, also known
814	  as "Shark" (<http://www.shark-linux.de/shark.html>).
815
816config ARCH_U300
817	bool "ST-Ericsson U300 Series"
818	depends on MMU
819	select ARCH_REQUIRE_GPIOLIB
820	select ARM_AMBA
821	select ARM_PATCH_PHYS_VIRT
822	select ARM_VIC
823	select CLKDEV_LOOKUP
824	select CLKSRC_MMIO
825	select COMMON_CLK
826	select CPU_ARM926T
827	select GENERIC_CLOCKEVENTS
828	select HAVE_TCM
829	select SPARSE_IRQ
830	help
831	  Support for ST-Ericsson U300 series mobile platforms.
832
833config ARCH_DAVINCI
834	bool "TI DaVinci"
835	select ARCH_HAS_HOLES_MEMORYMODEL
836	select ARCH_REQUIRE_GPIOLIB
837	select CLKDEV_LOOKUP
838	select GENERIC_ALLOCATOR
839	select GENERIC_CLOCKEVENTS
840	select GENERIC_IRQ_CHIP
841	select HAVE_IDE
842	select NEED_MACH_GPIO_H
843	select USE_OF
844	select ZONE_DMA
845	help
846	  Support for TI's DaVinci platform.
847
848config ARCH_OMAP1
849	bool "TI OMAP1"
850	depends on MMU
851	select ARCH_HAS_CPUFREQ
852	select ARCH_HAS_HOLES_MEMORYMODEL
853	select ARCH_OMAP
854	select ARCH_REQUIRE_GPIOLIB
855	select CLKDEV_LOOKUP
856	select CLKSRC_MMIO
857	select GENERIC_CLOCKEVENTS
858	select GENERIC_IRQ_CHIP
859	select HAVE_CLK
860	select HAVE_IDE
861	select IRQ_DOMAIN
862	select NEED_MACH_IO_H if PCCARD
863	select NEED_MACH_MEMORY_H
864	help
865	  Support for older TI OMAP1 (omap7xx, omap15xx or omap16xx)
866
867endchoice
868
869menu "Multiple platform selection"
870	depends on ARCH_MULTIPLATFORM
871
872comment "CPU Core family selection"
873
874config ARCH_MULTI_V4
875	bool "ARMv4 based platforms (FA526, StrongARM)"
876	depends on !ARCH_MULTI_V6_V7
877	select ARCH_MULTI_V4_V5
878
879config ARCH_MULTI_V4T
880	bool "ARMv4T based platforms (ARM720T, ARM920T, ...)"
881	depends on !ARCH_MULTI_V6_V7
882	select ARCH_MULTI_V4_V5
883
884config ARCH_MULTI_V5
885	bool "ARMv5 based platforms (ARM926T, XSCALE, PJ1, ...)"
886	depends on !ARCH_MULTI_V6_V7
887	select ARCH_MULTI_V4_V5
888
889config ARCH_MULTI_V4_V5
890	bool
891
892config ARCH_MULTI_V6
893	bool "ARMv6 based platforms (ARM11)"
894	select ARCH_MULTI_V6_V7
895	select CPU_V6
896
897config ARCH_MULTI_V7
898	bool "ARMv7 based platforms (Cortex-A, PJ4, Scorpion, Krait)"
899	default y
900	select ARCH_MULTI_V6_V7
901	select CPU_V7
902
903config ARCH_MULTI_V6_V7
904	bool
905
906config ARCH_MULTI_CPU_AUTO
907	def_bool !(ARCH_MULTI_V4 || ARCH_MULTI_V4T || ARCH_MULTI_V6_V7)
908	select ARCH_MULTI_V5
909
910endmenu
911
912#
913# This is sorted alphabetically by mach-* pathname.  However, plat-*
914# Kconfigs may be included either alphabetically (according to the
915# plat- suffix) or along side the corresponding mach-* source.
916#
917source "arch/arm/mach-mvebu/Kconfig"
918
919source "arch/arm/mach-at91/Kconfig"
920
921source "arch/arm/mach-bcm/Kconfig"
922
923source "arch/arm/mach-bcm2835/Kconfig"
924
925source "arch/arm/mach-clps711x/Kconfig"
926
927source "arch/arm/mach-cns3xxx/Kconfig"
928
929source "arch/arm/mach-davinci/Kconfig"
930
931source "arch/arm/mach-dove/Kconfig"
932
933source "arch/arm/mach-ep93xx/Kconfig"
934
935source "arch/arm/mach-footbridge/Kconfig"
936
937source "arch/arm/mach-gemini/Kconfig"
938
939source "arch/arm/mach-highbank/Kconfig"
940
941source "arch/arm/mach-integrator/Kconfig"
942
943source "arch/arm/mach-iop32x/Kconfig"
944
945source "arch/arm/mach-iop33x/Kconfig"
946
947source "arch/arm/mach-iop13xx/Kconfig"
948
949source "arch/arm/mach-ixp4xx/Kconfig"
950
951source "arch/arm/mach-kirkwood/Kconfig"
952
953source "arch/arm/mach-ks8695/Kconfig"
954
955source "arch/arm/mach-msm/Kconfig"
956
957source "arch/arm/mach-mv78xx0/Kconfig"
958
959source "arch/arm/mach-imx/Kconfig"
960
961source "arch/arm/mach-mxs/Kconfig"
962
963source "arch/arm/mach-netx/Kconfig"
964
965source "arch/arm/mach-nomadik/Kconfig"
966
967source "arch/arm/plat-omap/Kconfig"
968
969source "arch/arm/mach-omap1/Kconfig"
970
971source "arch/arm/mach-omap2/Kconfig"
972
973source "arch/arm/mach-orion5x/Kconfig"
974
975source "arch/arm/mach-picoxcell/Kconfig"
976
977source "arch/arm/mach-pxa/Kconfig"
978source "arch/arm/plat-pxa/Kconfig"
979
980source "arch/arm/mach-mmp/Kconfig"
981
982source "arch/arm/mach-realview/Kconfig"
983
984source "arch/arm/mach-sa1100/Kconfig"
985
986source "arch/arm/plat-samsung/Kconfig"
987
988source "arch/arm/mach-socfpga/Kconfig"
989
990source "arch/arm/mach-spear/Kconfig"
991
992source "arch/arm/mach-s3c24xx/Kconfig"
993
994if ARCH_S3C64XX
995source "arch/arm/mach-s3c64xx/Kconfig"
996endif
997
998source "arch/arm/mach-s5p64x0/Kconfig"
999
1000source "arch/arm/mach-s5pc100/Kconfig"
1001
1002source "arch/arm/mach-s5pv210/Kconfig"
1003
1004source "arch/arm/mach-exynos/Kconfig"
1005
1006source "arch/arm/mach-shmobile/Kconfig"
1007
1008source "arch/arm/mach-sunxi/Kconfig"
1009
1010source "arch/arm/mach-prima2/Kconfig"
1011
1012source "arch/arm/mach-tegra/Kconfig"
1013
1014source "arch/arm/mach-u300/Kconfig"
1015
1016source "arch/arm/mach-ux500/Kconfig"
1017
1018source "arch/arm/mach-versatile/Kconfig"
1019
1020source "arch/arm/mach-vexpress/Kconfig"
1021source "arch/arm/plat-versatile/Kconfig"
1022
1023source "arch/arm/mach-virt/Kconfig"
1024
1025source "arch/arm/mach-vt8500/Kconfig"
1026
1027source "arch/arm/mach-w90x900/Kconfig"
1028
1029source "arch/arm/mach-zynq/Kconfig"
1030
1031# Definitions to make life easier
1032config ARCH_ACORN
1033	bool
1034
1035config PLAT_IOP
1036	bool
1037	select GENERIC_CLOCKEVENTS
1038
1039config PLAT_ORION
1040	bool
1041	select CLKSRC_MMIO
1042	select COMMON_CLK
1043	select GENERIC_IRQ_CHIP
1044	select IRQ_DOMAIN
1045
1046config PLAT_ORION_LEGACY
1047	bool
1048	select PLAT_ORION
1049
1050config PLAT_PXA
1051	bool
1052
1053config PLAT_VERSATILE
1054	bool
1055
1056config ARM_TIMER_SP804
1057	bool
1058	select CLKSRC_MMIO
1059	select CLKSRC_OF if OF
1060
1061source arch/arm/mm/Kconfig
1062
1063config ARM_NR_BANKS
1064	int
1065	default 16 if ARCH_EP93XX
1066	default 8
1067
1068config IWMMXT
1069	bool "Enable iWMMXt support" if !CPU_PJ4
1070	depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
1071	default y if PXA27x || PXA3xx || ARCH_MMP || CPU_PJ4
1072	help
1073	  Enable support for iWMMXt context switching at run time if
1074	  running on a CPU that supports it.
1075
1076config XSCALE_PMU
1077	bool
1078	depends on CPU_XSCALE
1079	default y
1080
1081config MULTI_IRQ_HANDLER
1082	bool
1083	help
1084	  Allow each machine to specify it's own IRQ handler at run time.
1085
1086if !MMU
1087source "arch/arm/Kconfig-nommu"
1088endif
1089
1090config ARM_ERRATA_326103
1091	bool "ARM errata: FSR write bit incorrect on a SWP to read-only memory"
1092	depends on CPU_V6
1093	help
1094	  Executing a SWP instruction to read-only memory does not set bit 11
1095	  of the FSR on the ARM 1136 prior to r1p0. This causes the kernel to
1096	  treat the access as a read, preventing a COW from occurring and
1097	  causing the faulting task to livelock.
1098
1099config ARM_ERRATA_411920
1100	bool "ARM errata: Invalidation of the Instruction Cache operation can fail"
1101	depends on CPU_V6 || CPU_V6K
1102	help
1103	  Invalidation of the Instruction Cache operation can
1104	  fail. This erratum is present in 1136 (before r1p4), 1156 and 1176.
1105	  It does not affect the MPCore. This option enables the ARM Ltd.
1106	  recommended workaround.
1107
1108config ARM_ERRATA_430973
1109	bool "ARM errata: Stale prediction on replaced interworking branch"
1110	depends on CPU_V7
1111	help
1112	  This option enables the workaround for the 430973 Cortex-A8
1113	  (r1p0..r1p2) erratum. If a code sequence containing an ARM/Thumb
1114	  interworking branch is replaced with another code sequence at the
1115	  same virtual address, whether due to self-modifying code or virtual
1116	  to physical address re-mapping, Cortex-A8 does not recover from the
1117	  stale interworking branch prediction. This results in Cortex-A8
1118	  executing the new code sequence in the incorrect ARM or Thumb state.
1119	  The workaround enables the BTB/BTAC operations by setting ACTLR.IBE
1120	  and also flushes the branch target cache at every context switch.
1121	  Note that setting specific bits in the ACTLR register may not be
1122	  available in non-secure mode.
1123
1124config ARM_ERRATA_458693
1125	bool "ARM errata: Processor deadlock when a false hazard is created"
1126	depends on CPU_V7
1127	depends on !ARCH_MULTIPLATFORM
1128	help
1129	  This option enables the workaround for the 458693 Cortex-A8 (r2p0)
1130	  erratum. For very specific sequences of memory operations, it is
1131	  possible for a hazard condition intended for a cache line to instead
1132	  be incorrectly associated with a different cache line. This false
1133	  hazard might then cause a processor deadlock. The workaround enables
1134	  the L1 caching of the NEON accesses and disables the PLD instruction
1135	  in the ACTLR register. Note that setting specific bits in the ACTLR
1136	  register may not be available in non-secure mode.
1137
1138config ARM_ERRATA_460075
1139	bool "ARM errata: Data written to the L2 cache can be overwritten with stale data"
1140	depends on CPU_V7
1141	depends on !ARCH_MULTIPLATFORM
1142	help
1143	  This option enables the workaround for the 460075 Cortex-A8 (r2p0)
1144	  erratum. Any asynchronous access to the L2 cache may encounter a
1145	  situation in which recent store transactions to the L2 cache are lost
1146	  and overwritten with stale memory contents from external memory. The
1147	  workaround disables the write-allocate mode for the L2 cache via the
1148	  ACTLR register. Note that setting specific bits in the ACTLR register
1149	  may not be available in non-secure mode.
1150
1151config ARM_ERRATA_742230
1152	bool "ARM errata: DMB operation may be faulty"
1153	depends on CPU_V7 && SMP
1154	depends on !ARCH_MULTIPLATFORM
1155	help
1156	  This option enables the workaround for the 742230 Cortex-A9
1157	  (r1p0..r2p2) erratum. Under rare circumstances, a DMB instruction
1158	  between two write operations may not ensure the correct visibility
1159	  ordering of the two writes. This workaround sets a specific bit in
1160	  the diagnostic register of the Cortex-A9 which causes the DMB
1161	  instruction to behave as a DSB, ensuring the correct behaviour of
1162	  the two writes.
1163
1164config ARM_ERRATA_742231
1165	bool "ARM errata: Incorrect hazard handling in the SCU may lead to data corruption"
1166	depends on CPU_V7 && SMP
1167	depends on !ARCH_MULTIPLATFORM
1168	help
1169	  This option enables the workaround for the 742231 Cortex-A9
1170	  (r2p0..r2p2) erratum. Under certain conditions, specific to the
1171	  Cortex-A9 MPCore micro-architecture, two CPUs working in SMP mode,
1172	  accessing some data located in the same cache line, may get corrupted
1173	  data due to bad handling of the address hazard when the line gets
1174	  replaced from one of the CPUs at the same time as another CPU is
1175	  accessing it. This workaround sets specific bits in the diagnostic
1176	  register of the Cortex-A9 which reduces the linefill issuing
1177	  capabilities of the processor.
1178
1179config PL310_ERRATA_588369
1180	bool "PL310 errata: Clean & Invalidate maintenance operations do not invalidate clean lines"
1181	depends on CACHE_L2X0
1182	help
1183	   The PL310 L2 cache controller implements three types of Clean &
1184	   Invalidate maintenance operations: by Physical Address
1185	   (offset 0x7F0), by Index/Way (0x7F8) and by Way (0x7FC).
1186	   They are architecturally defined to behave as the execution of a
1187	   clean operation followed immediately by an invalidate operation,
1188	   both performing to the same memory location. This functionality
1189	   is not correctly implemented in PL310 as clean lines are not
1190	   invalidated as a result of these operations.
1191
1192config ARM_ERRATA_643719
1193	bool "ARM errata: LoUIS bit field in CLIDR register is incorrect"
1194	depends on CPU_V7 && SMP
1195	help
1196	  This option enables the workaround for the 643719 Cortex-A9 (prior to
1197	  r1p0) erratum. On affected cores the LoUIS bit field of the CLIDR
1198	  register returns zero when it should return one. The workaround
1199	  corrects this value, ensuring cache maintenance operations which use
1200	  it behave as intended and avoiding data corruption.
1201
1202config ARM_ERRATA_720789
1203	bool "ARM errata: TLBIASIDIS and TLBIMVAIS operations can broadcast a faulty ASID"
1204	depends on CPU_V7
1205	help
1206	  This option enables the workaround for the 720789 Cortex-A9 (prior to
1207	  r2p0) erratum. A faulty ASID can be sent to the other CPUs for the
1208	  broadcasted CP15 TLB maintenance operations TLBIASIDIS and TLBIMVAIS.
1209	  As a consequence of this erratum, some TLB entries which should be
1210	  invalidated are not, resulting in an incoherency in the system page
1211	  tables. The workaround changes the TLB flushing routines to invalidate
1212	  entries regardless of the ASID.
1213
1214config PL310_ERRATA_727915
1215	bool "PL310 errata: Background Clean & Invalidate by Way operation can cause data corruption"
1216	depends on CACHE_L2X0
1217	help
1218	  PL310 implements the Clean & Invalidate by Way L2 cache maintenance
1219	  operation (offset 0x7FC). This operation runs in background so that
1220	  PL310 can handle normal accesses while it is in progress. Under very
1221	  rare circumstances, due to this erratum, write data can be lost when
1222	  PL310 treats a cacheable write transaction during a Clean &
1223	  Invalidate by Way operation.
1224
1225config ARM_ERRATA_743622
1226	bool "ARM errata: Faulty hazard checking in the Store Buffer may lead to data corruption"
1227	depends on CPU_V7
1228	depends on !ARCH_MULTIPLATFORM
1229	help
1230	  This option enables the workaround for the 743622 Cortex-A9
1231	  (r2p*) erratum. Under very rare conditions, a faulty
1232	  optimisation in the Cortex-A9 Store Buffer may lead to data
1233	  corruption. This workaround sets a specific bit in the diagnostic
1234	  register of the Cortex-A9 which disables the Store Buffer
1235	  optimisation, preventing the defect from occurring. This has no
1236	  visible impact on the overall performance or power consumption of the
1237	  processor.
1238
1239config ARM_ERRATA_751472
1240	bool "ARM errata: Interrupted ICIALLUIS may prevent completion of broadcasted operation"
1241	depends on CPU_V7
1242	depends on !ARCH_MULTIPLATFORM
1243	help
1244	  This option enables the workaround for the 751472 Cortex-A9 (prior
1245	  to r3p0) erratum. An interrupted ICIALLUIS operation may prevent the
1246	  completion of a following broadcasted operation if the second
1247	  operation is received by a CPU before the ICIALLUIS has completed,
1248	  potentially leading to corrupted entries in the cache or TLB.
1249
1250config PL310_ERRATA_753970
1251	bool "PL310 errata: cache sync operation may be faulty"
1252	depends on CACHE_PL310
1253	help
1254	  This option enables the workaround for the 753970 PL310 (r3p0) erratum.
1255
1256	  Under some condition the effect of cache sync operation on
1257	  the store buffer still remains when the operation completes.
1258	  This means that the store buffer is always asked to drain and
1259	  this prevents it from merging any further writes. The workaround
1260	  is to replace the normal offset of cache sync operation (0x730)
1261	  by another offset targeting an unmapped PL310 register 0x740.
1262	  This has the same effect as the cache sync operation: store buffer
1263	  drain and waiting for all buffers empty.
1264
1265config ARM_ERRATA_754322
1266	bool "ARM errata: possible faulty MMU translations following an ASID switch"
1267	depends on CPU_V7
1268	help
1269	  This option enables the workaround for the 754322 Cortex-A9 (r2p*,
1270	  r3p*) erratum. A speculative memory access may cause a page table walk
1271	  which starts prior to an ASID switch but completes afterwards. This
1272	  can populate the micro-TLB with a stale entry which may be hit with
1273	  the new ASID. This workaround places two dsb instructions in the mm
1274	  switching code so that no page table walks can cross the ASID switch.
1275
1276config ARM_ERRATA_754327
1277	bool "ARM errata: no automatic Store Buffer drain"
1278	depends on CPU_V7 && SMP
1279	help
1280	  This option enables the workaround for the 754327 Cortex-A9 (prior to
1281	  r2p0) erratum. The Store Buffer does not have any automatic draining
1282	  mechanism and therefore a livelock may occur if an external agent
1283	  continuously polls a memory location waiting to observe an update.
1284	  This workaround defines cpu_relax() as smp_mb(), preventing correctly
1285	  written polling loops from denying visibility of updates to memory.
1286
1287config ARM_ERRATA_364296
1288	bool "ARM errata: Possible cache data corruption with hit-under-miss enabled"
1289	depends on CPU_V6 && !SMP
1290	help
1291	  This options enables the workaround for the 364296 ARM1136
1292	  r0p2 erratum (possible cache data corruption with
1293	  hit-under-miss enabled). It sets the undocumented bit 31 in
1294	  the auxiliary control register and the FI bit in the control
1295	  register, thus disabling hit-under-miss without putting the
1296	  processor into full low interrupt latency mode. ARM11MPCore
1297	  is not affected.
1298
1299config ARM_ERRATA_764369
1300	bool "ARM errata: Data cache line maintenance operation by MVA may not succeed"
1301	depends on CPU_V7 && SMP
1302	help
1303	  This option enables the workaround for erratum 764369
1304	  affecting Cortex-A9 MPCore with two or more processors (all
1305	  current revisions). Under certain timing circumstances, a data
1306	  cache line maintenance operation by MVA targeting an Inner
1307	  Shareable memory region may fail to proceed up to either the
1308	  Point of Coherency or to the Point of Unification of the
1309	  system. This workaround adds a DSB instruction before the
1310	  relevant cache maintenance functions and sets a specific bit
1311	  in the diagnostic control register of the SCU.
1312
1313config PL310_ERRATA_769419
1314	bool "PL310 errata: no automatic Store Buffer drain"
1315	depends on CACHE_L2X0
1316	help
1317	  On revisions of the PL310 prior to r3p2, the Store Buffer does
1318	  not automatically drain. This can cause normal, non-cacheable
1319	  writes to be retained when the memory system is idle, leading
1320	  to suboptimal I/O performance for drivers using coherent DMA.
1321	  This option adds a write barrier to the cpu_idle loop so that,
1322	  on systems with an outer cache, the store buffer is drained
1323	  explicitly.
1324
1325config ARM_ERRATA_775420
1326       bool "ARM errata: A data cache maintenance operation which aborts, might lead to deadlock"
1327       depends on CPU_V7
1328       help
1329	 This option enables the workaround for the 775420 Cortex-A9 (r2p2,
1330	 r2p6,r2p8,r2p10,r3p0) erratum. In case a date cache maintenance
1331	 operation aborts with MMU exception, it might cause the processor
1332	 to deadlock. This workaround puts DSB before executing ISB if
1333	 an abort may occur on cache maintenance.
1334
1335config ARM_ERRATA_798181
1336	bool "ARM errata: TLBI/DSB failure on Cortex-A15"
1337	depends on CPU_V7 && SMP
1338	help
1339	  On Cortex-A15 (r0p0..r3p2) the TLBI*IS/DSB operations are not
1340	  adequately shooting down all use of the old entries. This
1341	  option enables the Linux kernel workaround for this erratum
1342	  which sends an IPI to the CPUs that are running the same ASID
1343	  as the one being invalidated.
1344
1345endmenu
1346
1347source "arch/arm/common/Kconfig"
1348
1349menu "Bus support"
1350
1351config ARM_AMBA
1352	bool
1353
1354config ISA
1355	bool
1356	help
1357	  Find out whether you have ISA slots on your motherboard.  ISA is the
1358	  name of a bus system, i.e. the way the CPU talks to the other stuff
1359	  inside your box.  Other bus systems are PCI, EISA, MicroChannel
1360	  (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
1361	  newer boards don't support it.  If you have ISA, say Y, otherwise N.
1362
1363# Select ISA DMA controller support
1364config ISA_DMA
1365	bool
1366	select ISA_DMA_API
1367
1368# Select ISA DMA interface
1369config ISA_DMA_API
1370	bool
1371
1372config PCI
1373	bool "PCI support" if MIGHT_HAVE_PCI
1374	help
1375	  Find out whether you have a PCI motherboard. PCI is the name of a
1376	  bus system, i.e. the way the CPU talks to the other stuff inside
1377	  your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
1378	  VESA. If you have PCI, say Y, otherwise N.
1379
1380config PCI_DOMAINS
1381	bool
1382	depends on PCI
1383
1384config PCI_NANOENGINE
1385	bool "BSE nanoEngine PCI support"
1386	depends on SA1100_NANOENGINE
1387	help
1388	  Enable PCI on the BSE nanoEngine board.
1389
1390config PCI_SYSCALL
1391	def_bool PCI
1392
1393# Select the host bridge type
1394config PCI_HOST_VIA82C505
1395	bool
1396	depends on PCI && ARCH_SHARK
1397	default y
1398
1399config PCI_HOST_ITE8152
1400	bool
1401	depends on PCI && MACH_ARMCORE
1402	default y
1403	select DMABOUNCE
1404
1405source "drivers/pci/Kconfig"
1406
1407source "drivers/pcmcia/Kconfig"
1408
1409endmenu
1410
1411menu "Kernel Features"
1412
1413config HAVE_SMP
1414	bool
1415	help
1416	  This option should be selected by machines which have an SMP-
1417	  capable CPU.
1418
1419	  The only effect of this option is to make the SMP-related
1420	  options available to the user for configuration.
1421
1422config SMP
1423	bool "Symmetric Multi-Processing"
1424	depends on CPU_V6K || CPU_V7
1425	depends on GENERIC_CLOCKEVENTS
1426	depends on HAVE_SMP
1427	depends on MMU
1428	select USE_GENERIC_SMP_HELPERS
1429	help
1430	  This enables support for systems with more than one CPU. If you have
1431	  a system with only one CPU, like most personal computers, say N. If
1432	  you have a system with more than one CPU, say Y.
1433
1434	  If you say N here, the kernel will run on single and multiprocessor
1435	  machines, but will use only one CPU of a multiprocessor machine. If
1436	  you say Y here, the kernel will run on many, but not all, single
1437	  processor machines. On a single processor machine, the kernel will
1438	  run faster if you say N here.
1439
1440	  See also <file:Documentation/x86/i386/IO-APIC.txt>,
1441	  <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
1442	  <http://tldp.org/HOWTO/SMP-HOWTO.html>.
1443
1444	  If you don't know what to do here, say N.
1445
1446config SMP_ON_UP
1447	bool "Allow booting SMP kernel on uniprocessor systems (EXPERIMENTAL)"
1448	depends on SMP && !XIP_KERNEL
1449	default y
1450	help
1451	  SMP kernels contain instructions which fail on non-SMP processors.
1452	  Enabling this option allows the kernel to modify itself to make
1453	  these instructions safe.  Disabling it allows about 1K of space
1454	  savings.
1455
1456	  If you don't know what to do here, say Y.
1457
1458config ARM_CPU_TOPOLOGY
1459	bool "Support cpu topology definition"
1460	depends on SMP && CPU_V7
1461	default y
1462	help
1463	  Support ARM cpu topology definition. The MPIDR register defines
1464	  affinity between processors which is then used to describe the cpu
1465	  topology of an ARM System.
1466
1467config SCHED_MC
1468	bool "Multi-core scheduler support"
1469	depends on ARM_CPU_TOPOLOGY
1470	help
1471	  Multi-core scheduler support improves the CPU scheduler's decision
1472	  making when dealing with multi-core CPU chips at a cost of slightly
1473	  increased overhead in some places. If unsure say N here.
1474
1475config SCHED_SMT
1476	bool "SMT scheduler support"
1477	depends on ARM_CPU_TOPOLOGY
1478	help
1479	  Improves the CPU scheduler's decision making when dealing with
1480	  MultiThreading at a cost of slightly increased overhead in some
1481	  places. If unsure say N here.
1482
1483config HAVE_ARM_SCU
1484	bool
1485	help
1486	  This option enables support for the ARM system coherency unit
1487
1488config HAVE_ARM_ARCH_TIMER
1489	bool "Architected timer support"
1490	depends on CPU_V7
1491	select ARM_ARCH_TIMER
1492	help
1493	  This option enables support for the ARM architected timer
1494
1495config HAVE_ARM_TWD
1496	bool
1497	depends on SMP
1498	select CLKSRC_OF if OF
1499	help
1500	  This options enables support for the ARM timer and watchdog unit
1501
1502config MCPM
1503	bool "Multi-Cluster Power Management"
1504	depends on CPU_V7 && SMP
1505	help
1506	  This option provides the common power management infrastructure
1507	  for (multi-)cluster based systems, such as big.LITTLE based
1508	  systems.
1509
1510choice
1511	prompt "Memory split"
1512	default VMSPLIT_3G
1513	help
1514	  Select the desired split between kernel and user memory.
1515
1516	  If you are not absolutely sure what you are doing, leave this
1517	  option alone!
1518
1519	config VMSPLIT_3G
1520		bool "3G/1G user/kernel split"
1521	config VMSPLIT_2G
1522		bool "2G/2G user/kernel split"
1523	config VMSPLIT_1G
1524		bool "1G/3G user/kernel split"
1525endchoice
1526
1527config PAGE_OFFSET
1528	hex
1529	default 0x40000000 if VMSPLIT_1G
1530	default 0x80000000 if VMSPLIT_2G
1531	default 0xC0000000
1532
1533config NR_CPUS
1534	int "Maximum number of CPUs (2-32)"
1535	range 2 32
1536	depends on SMP
1537	default "4"
1538
1539config HOTPLUG_CPU
1540	bool "Support for hot-pluggable CPUs"
1541	depends on SMP && HOTPLUG
1542	help
1543	  Say Y here to experiment with turning CPUs off and on.  CPUs
1544	  can be controlled through /sys/devices/system/cpu.
1545
1546config ARM_PSCI
1547	bool "Support for the ARM Power State Coordination Interface (PSCI)"
1548	depends on CPU_V7
1549	help
1550	  Say Y here if you want Linux to communicate with system firmware
1551	  implementing the PSCI specification for CPU-centric power
1552	  management operations described in ARM document number ARM DEN
1553	  0022A ("Power State Coordination Interface System Software on
1554	  ARM processors").
1555
1556config LOCAL_TIMERS
1557	bool "Use local timer interrupts"
1558	depends on SMP
1559	default y
1560	help
1561	  Enable support for local timers on SMP platforms, rather then the
1562	  legacy IPI broadcast method.  Local timers allows the system
1563	  accounting to be spread across the timer interval, preventing a
1564	  "thundering herd" at every timer tick.
1565
1566# The GPIO number here must be sorted by descending number. In case of
1567# a multiplatform kernel, we just want the highest value required by the
1568# selected platforms.
1569config ARCH_NR_GPIO
1570	int
1571	default 1024 if ARCH_SHMOBILE || ARCH_TEGRA
1572	default 512 if SOC_OMAP5
1573	default 392 if ARCH_U8500
1574	default 352 if ARCH_VT8500
1575	default 288 if ARCH_SUNXI
1576	default 264 if MACH_H4700
1577	default 0
1578	help
1579	  Maximum number of GPIOs in the system.
1580
1581	  If unsure, leave the default value.
1582
1583source kernel/Kconfig.preempt
1584
1585config HZ
1586	int
1587	default 200 if ARCH_EBSA110 || ARCH_S3C24XX || ARCH_S5P64X0 || \
1588		ARCH_S5PV210 || ARCH_EXYNOS4
1589	default AT91_TIMER_HZ if ARCH_AT91
1590	default SHMOBILE_TIMER_HZ if ARCH_SHMOBILE
1591	default 100
1592
1593config SCHED_HRTICK
1594	def_bool HIGH_RES_TIMERS
1595
1596config THUMB2_KERNEL
1597	bool "Compile the kernel in Thumb-2 mode" if !CPU_THUMBONLY
1598	depends on CPU_V7 && !CPU_V6 && !CPU_V6K
1599	default y if CPU_THUMBONLY
1600	select AEABI
1601	select ARM_ASM_UNIFIED
1602	select ARM_UNWIND
1603	help
1604	  By enabling this option, the kernel will be compiled in
1605	  Thumb-2 mode. A compiler/assembler that understand the unified
1606	  ARM-Thumb syntax is needed.
1607
1608	  If unsure, say N.
1609
1610config THUMB2_AVOID_R_ARM_THM_JUMP11
1611	bool "Work around buggy Thumb-2 short branch relocations in gas"
1612	depends on THUMB2_KERNEL && MODULES
1613	default y
1614	help
1615	  Various binutils versions can resolve Thumb-2 branches to
1616	  locally-defined, preemptible global symbols as short-range "b.n"
1617	  branch instructions.
1618
1619	  This is a problem, because there's no guarantee the final
1620	  destination of the symbol, or any candidate locations for a
1621	  trampoline, are within range of the branch.  For this reason, the
1622	  kernel does not support fixing up the R_ARM_THM_JUMP11 (102)
1623	  relocation in modules at all, and it makes little sense to add
1624	  support.
1625
1626	  The symptom is that the kernel fails with an "unsupported
1627	  relocation" error when loading some modules.
1628
1629	  Until fixed tools are available, passing
1630	  -fno-optimize-sibling-calls to gcc should prevent gcc generating
1631	  code which hits this problem, at the cost of a bit of extra runtime
1632	  stack usage in some cases.
1633
1634	  The problem is described in more detail at:
1635	      https://bugs.launchpad.net/binutils-linaro/+bug/725126
1636
1637	  Only Thumb-2 kernels are affected.
1638
1639	  Unless you are sure your tools don't have this problem, say Y.
1640
1641config ARM_ASM_UNIFIED
1642	bool
1643
1644config AEABI
1645	bool "Use the ARM EABI to compile the kernel"
1646	help
1647	  This option allows for the kernel to be compiled using the latest
1648	  ARM ABI (aka EABI).  This is only useful if you are using a user
1649	  space environment that is also compiled with EABI.
1650
1651	  Since there are major incompatibilities between the legacy ABI and
1652	  EABI, especially with regard to structure member alignment, this
1653	  option also changes the kernel syscall calling convention to
1654	  disambiguate both ABIs and allow for backward compatibility support
1655	  (selected with CONFIG_OABI_COMPAT).
1656
1657	  To use this you need GCC version 4.0.0 or later.
1658
1659config OABI_COMPAT
1660	bool "Allow old ABI binaries to run with this kernel (EXPERIMENTAL)"
1661	depends on AEABI && !THUMB2_KERNEL
1662	default y
1663	help
1664	  This option preserves the old syscall interface along with the
1665	  new (ARM EABI) one. It also provides a compatibility layer to
1666	  intercept syscalls that have structure arguments which layout
1667	  in memory differs between the legacy ABI and the new ARM EABI
1668	  (only for non "thumb" binaries). This option adds a tiny
1669	  overhead to all syscalls and produces a slightly larger kernel.
1670	  If you know you'll be using only pure EABI user space then you
1671	  can say N here. If this option is not selected and you attempt
1672	  to execute a legacy ABI binary then the result will be
1673	  UNPREDICTABLE (in fact it can be predicted that it won't work
1674	  at all). If in doubt say Y.
1675
1676config ARCH_HAS_HOLES_MEMORYMODEL
1677	bool
1678
1679config ARCH_SPARSEMEM_ENABLE
1680	bool
1681
1682config ARCH_SPARSEMEM_DEFAULT
1683	def_bool ARCH_SPARSEMEM_ENABLE
1684
1685config ARCH_SELECT_MEMORY_MODEL
1686	def_bool ARCH_SPARSEMEM_ENABLE
1687
1688config HAVE_ARCH_PFN_VALID
1689	def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM
1690
1691config HIGHMEM
1692	bool "High Memory Support"
1693	depends on MMU
1694	help
1695	  The address space of ARM processors is only 4 Gigabytes large
1696	  and it has to accommodate user address space, kernel address
1697	  space as well as some memory mapped IO. That means that, if you
1698	  have a large amount of physical memory and/or IO, not all of the
1699	  memory can be "permanently mapped" by the kernel. The physical
1700	  memory that is not permanently mapped is called "high memory".
1701
1702	  Depending on the selected kernel/user memory split, minimum
1703	  vmalloc space and actual amount of RAM, you may not need this
1704	  option which should result in a slightly faster kernel.
1705
1706	  If unsure, say n.
1707
1708config HIGHPTE
1709	bool "Allocate 2nd-level pagetables from highmem"
1710	depends on HIGHMEM
1711
1712config HW_PERF_EVENTS
1713	bool "Enable hardware performance counter support for perf events"
1714	depends on PERF_EVENTS
1715	default y
1716	help
1717	  Enable hardware performance counter support for perf events. If
1718	  disabled, perf events will use software events only.
1719
1720source "mm/Kconfig"
1721
1722config FORCE_MAX_ZONEORDER
1723	int "Maximum zone order" if ARCH_SHMOBILE
1724	range 11 64 if ARCH_SHMOBILE
1725	default "12" if SOC_AM33XX
1726	default "9" if SA1111
1727	default "11"
1728	help
1729	  The kernel memory allocator divides physically contiguous memory
1730	  blocks into "zones", where each zone is a power of two number of
1731	  pages.  This option selects the largest power of two that the kernel
1732	  keeps in the memory allocator.  If you need to allocate very large
1733	  blocks of physically contiguous memory, then you may need to
1734	  increase this value.
1735
1736	  This config option is actually maximum order plus one. For example,
1737	  a value of 11 means that the largest free memory block is 2^10 pages.
1738
1739config ALIGNMENT_TRAP
1740	bool
1741	depends on CPU_CP15_MMU
1742	default y if !ARCH_EBSA110
1743	select HAVE_PROC_CPU if PROC_FS
1744	help
1745	  ARM processors cannot fetch/store information which is not
1746	  naturally aligned on the bus, i.e., a 4 byte fetch must start at an
1747	  address divisible by 4. On 32-bit ARM processors, these non-aligned
1748	  fetch/store instructions will be emulated in software if you say
1749	  here, which has a severe performance impact. This is necessary for
1750	  correct operation of some network protocols. With an IP-only
1751	  configuration it is safe to say N, otherwise say Y.
1752
1753config UACCESS_WITH_MEMCPY
1754	bool "Use kernel mem{cpy,set}() for {copy_to,clear}_user()"
1755	depends on MMU
1756	default y if CPU_FEROCEON
1757	help
1758	  Implement faster copy_to_user and clear_user methods for CPU
1759	  cores where a 8-word STM instruction give significantly higher
1760	  memory write throughput than a sequence of individual 32bit stores.
1761
1762	  A possible side effect is a slight increase in scheduling latency
1763	  between threads sharing the same address space if they invoke
1764	  such copy operations with large buffers.
1765
1766	  However, if the CPU data cache is using a write-allocate mode,
1767	  this option is unlikely to provide any performance gain.
1768
1769config SECCOMP
1770	bool
1771	prompt "Enable seccomp to safely compute untrusted bytecode"
1772	---help---
1773	  This kernel feature is useful for number crunching applications
1774	  that may need to compute untrusted bytecode during their
1775	  execution. By using pipes or other transports made available to
1776	  the process as file descriptors supporting the read/write
1777	  syscalls, it's possible to isolate those applications in
1778	  their own address space using seccomp. Once seccomp is
1779	  enabled via prctl(PR_SET_SECCOMP), it cannot be disabled
1780	  and the task is only allowed to execute a few safe syscalls
1781	  defined by each seccomp mode.
1782
1783config CC_STACKPROTECTOR
1784	bool "Enable -fstack-protector buffer overflow detection (EXPERIMENTAL)"
1785	help
1786	  This option turns on the -fstack-protector GCC feature. This
1787	  feature puts, at the beginning of functions, a canary value on
1788	  the stack just before the return address, and validates
1789	  the value just before actually returning.  Stack based buffer
1790	  overflows (that need to overwrite this return address) now also
1791	  overwrite the canary, which gets detected and the attack is then
1792	  neutralized via a kernel panic.
1793	  This feature requires gcc version 4.2 or above.
1794
1795config XEN_DOM0
1796	def_bool y
1797	depends on XEN
1798
1799config XEN
1800	bool "Xen guest support on ARM (EXPERIMENTAL)"
1801	depends on ARM && AEABI && OF
1802	depends on CPU_V7 && !CPU_V6
1803	depends on !GENERIC_ATOMIC64
1804	select ARM_PSCI
1805	help
1806	  Say Y if you want to run Linux in a Virtual Machine on Xen on ARM.
1807
1808endmenu
1809
1810menu "Boot options"
1811
1812config USE_OF
1813	bool "Flattened Device Tree support"
1814	select IRQ_DOMAIN
1815	select OF
1816	select OF_EARLY_FLATTREE
1817	help
1818	  Include support for flattened device tree machine descriptions.
1819
1820config ATAGS
1821	bool "Support for the traditional ATAGS boot data passing" if USE_OF
1822	default y
1823	help
1824	  This is the traditional way of passing data to the kernel at boot
1825	  time. If you are solely relying on the flattened device tree (or
1826	  the ARM_ATAG_DTB_COMPAT option) then you may unselect this option
1827	  to remove ATAGS support from your kernel binary.  If unsure,
1828	  leave this to y.
1829
1830config DEPRECATED_PARAM_STRUCT
1831	bool "Provide old way to pass kernel parameters"
1832	depends on ATAGS
1833	help
1834	  This was deprecated in 2001 and announced to live on for 5 years.
1835	  Some old boot loaders still use this way.
1836
1837# Compressed boot loader in ROM.  Yes, we really want to ask about
1838# TEXT and BSS so we preserve their values in the config files.
1839config ZBOOT_ROM_TEXT
1840	hex "Compressed ROM boot loader base address"
1841	default "0"
1842	help
1843	  The physical address at which the ROM-able zImage is to be
1844	  placed in the target.  Platforms which normally make use of
1845	  ROM-able zImage formats normally set this to a suitable
1846	  value in their defconfig file.
1847
1848	  If ZBOOT_ROM is not enabled, this has no effect.
1849
1850config ZBOOT_ROM_BSS
1851	hex "Compressed ROM boot loader BSS address"
1852	default "0"
1853	help
1854	  The base address of an area of read/write memory in the target
1855	  for the ROM-able zImage which must be available while the
1856	  decompressor is running. It must be large enough to hold the
1857	  entire decompressed kernel plus an additional 128 KiB.
1858	  Platforms which normally make use of ROM-able zImage formats
1859	  normally set this to a suitable value in their defconfig file.
1860
1861	  If ZBOOT_ROM is not enabled, this has no effect.
1862
1863config ZBOOT_ROM
1864	bool "Compressed boot loader in ROM/flash"
1865	depends on ZBOOT_ROM_TEXT != ZBOOT_ROM_BSS
1866	help
1867	  Say Y here if you intend to execute your compressed kernel image
1868	  (zImage) directly from ROM or flash.  If unsure, say N.
1869
1870choice
1871	prompt "Include SD/MMC loader in zImage (EXPERIMENTAL)"
1872	depends on ZBOOT_ROM && ARCH_SH7372
1873	default ZBOOT_ROM_NONE
1874	help
1875	  Include experimental SD/MMC loading code in the ROM-able zImage.
1876	  With this enabled it is possible to write the ROM-able zImage
1877	  kernel image to an MMC or SD card and boot the kernel straight
1878	  from the reset vector. At reset the processor Mask ROM will load
1879	  the first part of the ROM-able zImage which in turn loads the
1880	  rest the kernel image to RAM.
1881
1882config ZBOOT_ROM_NONE
1883	bool "No SD/MMC loader in zImage (EXPERIMENTAL)"
1884	help
1885	  Do not load image from SD or MMC
1886
1887config ZBOOT_ROM_MMCIF
1888	bool "Include MMCIF loader in zImage (EXPERIMENTAL)"
1889	help
1890	  Load image from MMCIF hardware block.
1891
1892config ZBOOT_ROM_SH_MOBILE_SDHI
1893	bool "Include SuperH Mobile SDHI loader in zImage (EXPERIMENTAL)"
1894	help
1895	  Load image from SDHI hardware block
1896
1897endchoice
1898
1899config ARM_APPENDED_DTB
1900	bool "Use appended device tree blob to zImage (EXPERIMENTAL)"
1901	depends on OF && !ZBOOT_ROM
1902	help
1903	  With this option, the boot code will look for a device tree binary
1904	  (DTB) appended to zImage
1905	  (e.g. cat zImage <filename>.dtb > zImage_w_dtb).
1906
1907	  This is meant as a backward compatibility convenience for those
1908	  systems with a bootloader that can't be upgraded to accommodate
1909	  the documented boot protocol using a device tree.
1910
1911	  Beware that there is very little in terms of protection against
1912	  this option being confused by leftover garbage in memory that might
1913	  look like a DTB header after a reboot if no actual DTB is appended
1914	  to zImage.  Do not leave this option active in a production kernel
1915	  if you don't intend to always append a DTB.  Proper passing of the
1916	  location into r2 of a bootloader provided DTB is always preferable
1917	  to this option.
1918
1919config ARM_ATAG_DTB_COMPAT
1920	bool "Supplement the appended DTB with traditional ATAG information"
1921	depends on ARM_APPENDED_DTB
1922	help
1923	  Some old bootloaders can't be updated to a DTB capable one, yet
1924	  they provide ATAGs with memory configuration, the ramdisk address,
1925	  the kernel cmdline string, etc.  Such information is dynamically
1926	  provided by the bootloader and can't always be stored in a static
1927	  DTB.  To allow a device tree enabled kernel to be used with such
1928	  bootloaders, this option allows zImage to extract the information
1929	  from the ATAG list and store it at run time into the appended DTB.
1930
1931choice
1932	prompt "Kernel command line type" if ARM_ATAG_DTB_COMPAT
1933	default ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
1934
1935config ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER
1936	bool "Use bootloader kernel arguments if available"
1937	help
1938	  Uses the command-line options passed by the boot loader instead of
1939	  the device tree bootargs property. If the boot loader doesn't provide
1940	  any, the device tree bootargs property will be used.
1941
1942config ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEND
1943	bool "Extend with bootloader kernel arguments"
1944	help
1945	  The command-line arguments provided by the boot loader will be
1946	  appended to the the device tree bootargs property.
1947
1948endchoice
1949
1950config CMDLINE
1951	string "Default kernel command string"
1952	default ""
1953	help
1954	  On some architectures (EBSA110 and CATS), there is currently no way
1955	  for the boot loader to pass arguments to the kernel. For these
1956	  architectures, you should supply some command-line options at build
1957	  time by entering them here. As a minimum, you should specify the
1958	  memory size and the root device (e.g., mem=64M root=/dev/nfs).
1959
1960choice
1961	prompt "Kernel command line type" if CMDLINE != ""
1962	default CMDLINE_FROM_BOOTLOADER
1963	depends on ATAGS
1964
1965config CMDLINE_FROM_BOOTLOADER
1966	bool "Use bootloader kernel arguments if available"
1967	help
1968	  Uses the command-line options passed by the boot loader. If
1969	  the boot loader doesn't provide any, the default kernel command
1970	  string provided in CMDLINE will be used.
1971
1972config CMDLINE_EXTEND
1973	bool "Extend bootloader kernel arguments"
1974	help
1975	  The command-line arguments provided by the boot loader will be
1976	  appended to the default kernel command string.
1977
1978config CMDLINE_FORCE
1979	bool "Always use the default kernel command string"
1980	help
1981	  Always use the default kernel command string, even if the boot
1982	  loader passes other arguments to the kernel.
1983	  This is useful if you cannot or don't want to change the
1984	  command-line options your boot loader passes to the kernel.
1985endchoice
1986
1987config XIP_KERNEL
1988	bool "Kernel Execute-In-Place from ROM"
1989	depends on !ZBOOT_ROM && !ARM_LPAE && !ARCH_MULTIPLATFORM
1990	help
1991	  Execute-In-Place allows the kernel to run from non-volatile storage
1992	  directly addressable by the CPU, such as NOR flash. This saves RAM
1993	  space since the text section of the kernel is not loaded from flash
1994	  to RAM.  Read-write sections, such as the data section and stack,
1995	  are still copied to RAM.  The XIP kernel is not compressed since
1996	  it has to run directly from flash, so it will take more space to
1997	  store it.  The flash address used to link the kernel object files,
1998	  and for storing it, is configuration dependent. Therefore, if you
1999	  say Y here, you must know the proper physical address where to
2000	  store the kernel image depending on your own flash memory usage.
2001
2002	  Also note that the make target becomes "make xipImage" rather than
2003	  "make zImage" or "make Image".  The final kernel binary to put in
2004	  ROM memory will be arch/arm/boot/xipImage.
2005
2006	  If unsure, say N.
2007
2008config XIP_PHYS_ADDR
2009	hex "XIP Kernel Physical Location"
2010	depends on XIP_KERNEL
2011	default "0x00080000"
2012	help
2013	  This is the physical address in your flash memory the kernel will
2014	  be linked for and stored to.  This address is dependent on your
2015	  own flash usage.
2016
2017config KEXEC
2018	bool "Kexec system call (EXPERIMENTAL)"
2019	depends on (!SMP || PM_SLEEP_SMP)
2020	help
2021	  kexec is a system call that implements the ability to shutdown your
2022	  current kernel, and to start another kernel.  It is like a reboot
2023	  but it is independent of the system firmware.   And like a reboot
2024	  you can start any kernel with it, not just Linux.
2025
2026	  It is an ongoing process to be certain the hardware in a machine
2027	  is properly shutdown, so do not be surprised if this code does not
2028	  initially work for you.  It may help to enable device hotplugging
2029	  support.
2030
2031config ATAGS_PROC
2032	bool "Export atags in procfs"
2033	depends on ATAGS && KEXEC
2034	default y
2035	help
2036	  Should the atags used to boot the kernel be exported in an "atags"
2037	  file in procfs. Useful with kexec.
2038
2039config CRASH_DUMP
2040	bool "Build kdump crash kernel (EXPERIMENTAL)"
2041	help
2042	  Generate crash dump after being started by kexec. This should
2043	  be normally only set in special crash dump kernels which are
2044	  loaded in the main kernel with kexec-tools into a specially
2045	  reserved region and then later executed after a crash by
2046	  kdump/kexec. The crash dump kernel must be compiled to a
2047	  memory address not used by the main kernel
2048
2049	  For more details see Documentation/kdump/kdump.txt
2050
2051config AUTO_ZRELADDR
2052	bool "Auto calculation of the decompressed kernel image address"
2053	depends on !ZBOOT_ROM && !ARCH_U300
2054	help
2055	  ZRELADDR is the physical address where the decompressed kernel
2056	  image will be placed. If AUTO_ZRELADDR is selected, the address
2057	  will be determined at run-time by masking the current IP with
2058	  0xf8000000. This assumes the zImage being placed in the first 128MB
2059	  from start of memory.
2060
2061endmenu
2062
2063menu "CPU Power Management"
2064
2065if ARCH_HAS_CPUFREQ
2066source "drivers/cpufreq/Kconfig"
2067
2068config CPU_FREQ_S3C
2069	bool
2070	help
2071	  Internal configuration node for common cpufreq on Samsung SoC
2072
2073config CPU_FREQ_S3C24XX
2074	bool "CPUfreq driver for Samsung S3C24XX series CPUs (EXPERIMENTAL)"
2075	depends on ARCH_S3C24XX && CPU_FREQ
2076	select CPU_FREQ_S3C
2077	help
2078	  This enables the CPUfreq driver for the Samsung S3C24XX family
2079	  of CPUs.
2080
2081	  For details, take a look at <file:Documentation/cpu-freq>.
2082
2083	  If in doubt, say N.
2084
2085config CPU_FREQ_S3C24XX_PLL
2086	bool "Support CPUfreq changing of PLL frequency (EXPERIMENTAL)"
2087	depends on CPU_FREQ_S3C24XX
2088	help
2089	  Compile in support for changing the PLL frequency from the
2090	  S3C24XX series CPUfreq driver. The PLL takes time to settle
2091	  after a frequency change, so by default it is not enabled.
2092
2093	  This also means that the PLL tables for the selected CPU(s) will
2094	  be built which may increase the size of the kernel image.
2095
2096config CPU_FREQ_S3C24XX_DEBUG
2097	bool "Debug CPUfreq Samsung driver core"
2098	depends on CPU_FREQ_S3C24XX
2099	help
2100	  Enable s3c_freq_dbg for the Samsung S3C CPUfreq core
2101
2102config CPU_FREQ_S3C24XX_IODEBUG
2103	bool "Debug CPUfreq Samsung driver IO timing"
2104	depends on CPU_FREQ_S3C24XX
2105	help
2106	  Enable s3c_freq_iodbg for the Samsung S3C CPUfreq core
2107
2108config CPU_FREQ_S3C24XX_DEBUGFS
2109	bool "Export debugfs for CPUFreq"
2110	depends on CPU_FREQ_S3C24XX && DEBUG_FS
2111	help
2112	  Export status information via debugfs.
2113
2114endif
2115
2116source "drivers/cpuidle/Kconfig"
2117
2118endmenu
2119
2120menu "Floating point emulation"
2121
2122comment "At least one emulation must be selected"
2123
2124config FPE_NWFPE
2125	bool "NWFPE math emulation"
2126	depends on (!AEABI || OABI_COMPAT) && !THUMB2_KERNEL
2127	---help---
2128	  Say Y to include the NWFPE floating point emulator in the kernel.
2129	  This is necessary to run most binaries. Linux does not currently
2130	  support floating point hardware so you need to say Y here even if
2131	  your machine has an FPA or floating point co-processor podule.
2132
2133	  You may say N here if you are going to load the Acorn FPEmulator
2134	  early in the bootup.
2135
2136config FPE_NWFPE_XP
2137	bool "Support extended precision"
2138	depends on FPE_NWFPE
2139	help
2140	  Say Y to include 80-bit support in the kernel floating-point
2141	  emulator.  Otherwise, only 32 and 64-bit support is compiled in.
2142	  Note that gcc does not generate 80-bit operations by default,
2143	  so in most cases this option only enlarges the size of the
2144	  floating point emulator without any good reason.
2145
2146	  You almost surely want to say N here.
2147
2148config FPE_FASTFPE
2149	bool "FastFPE math emulation (EXPERIMENTAL)"
2150	depends on (!AEABI || OABI_COMPAT) && !CPU_32v3
2151	---help---
2152	  Say Y here to include the FAST floating point emulator in the kernel.
2153	  This is an experimental much faster emulator which now also has full
2154	  precision for the mantissa.  It does not support any exceptions.
2155	  It is very simple, and approximately 3-6 times faster than NWFPE.
2156
2157	  It should be sufficient for most programs.  It may be not suitable
2158	  for scientific calculations, but you have to check this for yourself.
2159	  If you do not feel you need a faster FP emulation you should better
2160	  choose NWFPE.
2161
2162config VFP
2163	bool "VFP-format floating point maths"
2164	depends on CPU_V6 || CPU_V6K || CPU_ARM926T || CPU_V7 || CPU_FEROCEON
2165	help
2166	  Say Y to include VFP support code in the kernel. This is needed
2167	  if your hardware includes a VFP unit.
2168
2169	  Please see <file:Documentation/arm/VFP/release-notes.txt> for
2170	  release notes and additional status information.
2171
2172	  Say N if your target does not have VFP hardware.
2173
2174config VFPv3
2175	bool
2176	depends on VFP
2177	default y if CPU_V7
2178
2179config NEON
2180	bool "Advanced SIMD (NEON) Extension support"
2181	depends on VFPv3 && CPU_V7
2182	help
2183	  Say Y to include support code for NEON, the ARMv7 Advanced SIMD
2184	  Extension.
2185
2186endmenu
2187
2188menu "Userspace binary formats"
2189
2190source "fs/Kconfig.binfmt"
2191
2192config ARTHUR
2193	tristate "RISC OS personality"
2194	depends on !AEABI
2195	help
2196	  Say Y here to include the kernel code necessary if you want to run
2197	  Acorn RISC OS/Arthur binaries under Linux. This code is still very
2198	  experimental; if this sounds frightening, say N and sleep in peace.
2199	  You can also say M here to compile this support as a module (which
2200	  will be called arthur).
2201
2202endmenu
2203
2204menu "Power management options"
2205
2206source "kernel/power/Kconfig"
2207
2208config ARCH_SUSPEND_POSSIBLE
2209	depends on !ARCH_S5PC100
2210	depends on CPU_ARM920T || CPU_ARM926T || CPU_SA1100 || \
2211		CPU_V6 || CPU_V6K || CPU_V7 || CPU_XSC3 || CPU_XSCALE || CPU_MOHAWK
2212	def_bool y
2213
2214config ARM_CPU_SUSPEND
2215	def_bool PM_SLEEP
2216
2217endmenu
2218
2219source "net/Kconfig"
2220
2221source "drivers/Kconfig"
2222
2223source "fs/Kconfig"
2224
2225source "arch/arm/Kconfig.debug"
2226
2227source "security/Kconfig"
2228
2229source "crypto/Kconfig"
2230
2231source "lib/Kconfig"
2232
2233source "arch/arm/kvm/Kconfig"
2234