[linux.git] / arch / arm / mm / Kconfig

comment "Processor Type"

config CPU_32
	bool
	default y

# Select CPU types depending on the architecture selected.  This selects
# which CPUs we support in the kernel image, and the compiler instruction
# optimiser behaviour.

# ARM610
config CPU_ARM610
	bool "Support ARM610 processor"
	depends on ARCH_RPC
	select CPU_32v3
	select CPU_CACHE_V3
	select CPU_CACHE_VIVT
	select CPU_COPY_V3
	select CPU_TLB_V3
	help
	  The ARM610 is the successor to the ARM3 processor
	  and was produced by VLSI Technology Inc.

	  Say Y if you want support for the ARM610 processor.
	  Otherwise, say N.

# ARM710
config CPU_ARM710
	bool "Support ARM710 processor" if !ARCH_CLPS7500 && ARCH_RPC
	default y if ARCH_CLPS7500
	select CPU_32v3
	select CPU_CACHE_V3
	select CPU_CACHE_VIVT
	select CPU_COPY_V3
	select CPU_TLB_V3
	help
	  A 32-bit RISC microprocessor based on the ARM7 processor core
	  designed by Advanced RISC Machines Ltd. The ARM710 is the
	  successor to the ARM610 processor. It was released in
	  July 1994 by VLSI Technology Inc.

	  Say Y if you want support for the ARM710 processor.
	  Otherwise, say N.

# ARM720T
config CPU_ARM720T
	bool "Support ARM720T processor" if !ARCH_CLPS711X && !ARCH_L7200 && !ARCH_CDB89712 && ARCH_INTEGRATOR
	default y if ARCH_CLPS711X || ARCH_L7200 || ARCH_CDB89712 || ARCH_H720X
	select CPU_32v4
	select CPU_ABRT_LV4T
	select CPU_CACHE_V4
	select CPU_CACHE_VIVT
	select CPU_COPY_V4WT
	select CPU_TLB_V4WT
	help
	  A 32-bit RISC processor with 8kByte Cache, Write Buffer and
	  MMU built around an ARM7TDMI core.

	  Say Y if you want support for the ARM720T processor.
	  Otherwise, say N.

# ARM920T
config CPU_ARM920T
	bool "Support ARM920T processor" if !ARCH_S3C2410
	depends on ARCH_INTEGRATOR || ARCH_S3C2410 || ARCH_IMX || ARCH_AAEC2000
	default y if ARCH_S3C2410
	select CPU_32v4
	select CPU_ABRT_EV4T
	select CPU_CACHE_V4WT
	select CPU_CACHE_VIVT
	select CPU_COPY_V4WB
	select CPU_TLB_V4WBI
	help
	  The ARM920T is licensed to be produced by numerous vendors,
	  and is used in the Maverick EP9312 and the Samsung S3C2410.

	  More information on the Maverick EP9312 at
	  <http://linuxdevices.com/products/PD2382866068.html>.

	  Say Y if you want support for the ARM920T processor.
	  Otherwise, say N.

# ARM922T
config CPU_ARM922T
	bool "Support ARM922T processor" if ARCH_INTEGRATOR
	depends on ARCH_CAMELOT || ARCH_LH7A40X || ARCH_INTEGRATOR
	default y if ARCH_CAMELOT || ARCH_LH7A40X
	select CPU_32v4
	select CPU_ABRT_EV4T
	select CPU_CACHE_V4WT
	select CPU_CACHE_VIVT
	select CPU_COPY_V4WB
	select CPU_TLB_V4WBI
	help
	  The ARM922T is a version of the ARM920T, but with smaller
	  instruction and data caches. It is used in Altera's
	  Excalibur XA device family.

	  Say Y if you want support for the ARM922T processor.
	  Otherwise, say N.

# ARM925T
config CPU_ARM925T
 	bool "Support ARM925T processor" if ARCH_OMAP1
 	depends on ARCH_OMAP1510
 	default y if ARCH_OMAP1510
	select CPU_32v4
	select CPU_ABRT_EV4T
	select CPU_CACHE_V4WT
	select CPU_CACHE_VIVT
	select CPU_COPY_V4WB
	select CPU_TLB_V4WBI
 	help
 	  The ARM925T is a mix between the ARM920T and ARM926T, but with
	  different instruction and data caches. It is used in TI's OMAP
 	  device family.

 	  Say Y if you want support for the ARM925T processor.
 	  Otherwise, say N.

# ARM926T
config CPU_ARM926T
	bool "Support ARM926T processor"
	depends on ARCH_INTEGRATOR || ARCH_VERSATILE_PB || MACH_VERSATILE_AB || ARCH_OMAP730 || ARCH_OMAP16XX || MACH_REALVIEW_EB
	default y if ARCH_VERSATILE_PB || MACH_VERSATILE_AB || ARCH_OMAP730 || ARCH_OMAP16XX
	select CPU_32v5
	select CPU_ABRT_EV5TJ
	select CPU_CACHE_VIVT
	select CPU_COPY_V4WB
	select CPU_TLB_V4WBI
	help
	  This is a variant of the ARM920.  It has slightly different
	  instruction sequences for cache and TLB operations.  Curiously,
	  there is no documentation on it at the ARM corporate website.

	  Say Y if you want support for the ARM926T processor.
	  Otherwise, say N.

# ARM1020 - needs validating
config CPU_ARM1020
	bool "Support ARM1020T (rev 0) processor"
	depends on ARCH_INTEGRATOR
	select CPU_32v5
	select CPU_ABRT_EV4T
	select CPU_CACHE_V4WT
	select CPU_CACHE_VIVT
	select CPU_COPY_V4WB
	select CPU_TLB_V4WBI
	help
	  The ARM1020 is the 32K cached version of the ARM10 processor,
	  with an addition of a floating-point unit.

	  Say Y if you want support for the ARM1020 processor.
	  Otherwise, say N.

# ARM1020E - needs validating
config CPU_ARM1020E
	bool "Support ARM1020E processor"
	depends on ARCH_INTEGRATOR
	select CPU_32v5
	select CPU_ABRT_EV4T
	select CPU_CACHE_V4WT
	select CPU_CACHE_VIVT
	select CPU_COPY_V4WB
	select CPU_TLB_V4WBI
	depends on n

# ARM1022E
config CPU_ARM1022
	bool "Support ARM1022E processor"
	depends on ARCH_INTEGRATOR
	select CPU_32v5
	select CPU_ABRT_EV4T
	select CPU_CACHE_VIVT
	select CPU_COPY_V4WB # can probably do better
	select CPU_TLB_V4WBI
	help
	  The ARM1022E is an implementation of the ARMv5TE architecture
	  based upon the ARM10 integer core with a 16KiB L1 Harvard cache,
	  embedded trace macrocell, and a floating-point unit.

	  Say Y if you want support for the ARM1022E processor.
	  Otherwise, say N.

# ARM1026EJ-S
config CPU_ARM1026
	bool "Support ARM1026EJ-S processor"
	depends on ARCH_INTEGRATOR
	select CPU_32v5
	select CPU_ABRT_EV5T # But need Jazelle, but EV5TJ ignores bit 10
	select CPU_CACHE_VIVT
	select CPU_COPY_V4WB # can probably do better
	select CPU_TLB_V4WBI
	help
	  The ARM1026EJ-S is an implementation of the ARMv5TEJ architecture
	  based upon the ARM10 integer core.

	  Say Y if you want support for the ARM1026EJ-S processor.
	  Otherwise, say N.

# SA110
config CPU_SA110
	bool "Support StrongARM(R) SA-110 processor" if !ARCH_EBSA110 && !FOOTBRIDGE && !ARCH_TBOX && !ARCH_SHARK && !ARCH_NEXUSPCI && ARCH_RPC
	default y if ARCH_EBSA110 || FOOTBRIDGE || ARCH_TBOX || ARCH_SHARK || ARCH_NEXUSPCI
	select CPU_32v3 if ARCH_RPC
	select CPU_32v4 if !ARCH_RPC
	select CPU_ABRT_EV4
	select CPU_CACHE_V4WB
	select CPU_CACHE_VIVT
	select CPU_COPY_V4WB
	select CPU_TLB_V4WB
	help
	  The Intel StrongARM(R) SA-110 is a 32-bit microprocessor and
	  is available at five speeds ranging from 100 MHz to 233 MHz.
	  More information is available at
	  <http://developer.intel.com/design/strong/sa110.htm>.

	  Say Y if you want support for the SA-110 processor.
	  Otherwise, say N.

# SA1100
config CPU_SA1100
	bool
	depends on ARCH_SA1100
	default y
	select CPU_32v4
	select CPU_ABRT_EV4
	select CPU_CACHE_V4WB
	select CPU_CACHE_VIVT
	select CPU_TLB_V4WB

# XScale
config CPU_XSCALE
	bool
	depends on ARCH_IOP3XX || ARCH_PXA || ARCH_IXP4XX || ARCH_IXP2000
	default y
	select CPU_32v5
	select CPU_ABRT_EV5T
	select CPU_CACHE_VIVT
	select CPU_TLB_V4WBI

# ARMv6
config CPU_V6
	bool "Support ARM V6 processor"
	depends on ARCH_INTEGRATOR || MACH_REALVIEW_EB
	select CPU_32v6
	select CPU_ABRT_EV6
	select CPU_CACHE_V6
	select CPU_CACHE_VIPT
	select CPU_COPY_V6
	select CPU_TLB_V6

# ARMv6k
config CPU_32v6K
	bool "Support ARM V6K processor extensions" if !SMP
	depends on CPU_V6
	default y if SMP
	help
	  Say Y here if your ARMv6 processor supports the 'K' extension.
	  This enables the kernel to use some instructions not present
	  on previous processors, and as such a kernel build with this
	  enabled will not boot on processors with do not support these
	  instructions.

# Figure out what processor architecture version we should be using.
# This defines the compiler instruction set which depends on the machine type.
config CPU_32v3
	bool

config CPU_32v4
	bool

config CPU_32v5
	bool

config CPU_32v6
	bool

# The abort model
config CPU_ABRT_EV4
	bool

config CPU_ABRT_EV4T
	bool

config CPU_ABRT_LV4T
	bool

config CPU_ABRT_EV5T
	bool

config CPU_ABRT_EV5TJ
	bool

config CPU_ABRT_EV6
	bool

# The cache model
config CPU_CACHE_V3
	bool

config CPU_CACHE_V4
	bool

config CPU_CACHE_V4WT
	bool

config CPU_CACHE_V4WB
	bool

config CPU_CACHE_V6
	bool

config CPU_CACHE_VIVT
	bool

config CPU_CACHE_VIPT
	bool

# The copy-page model
config CPU_COPY_V3
	bool

config CPU_COPY_V4WT
	bool

config CPU_COPY_V4WB
	bool

config CPU_COPY_V6
	bool

# This selects the TLB model
config CPU_TLB_V3
	bool
	help
	  ARM Architecture Version 3 TLB.

config CPU_TLB_V4WT
	bool
	help
	  ARM Architecture Version 4 TLB with writethrough cache.

config CPU_TLB_V4WB
	bool
	help
	  ARM Architecture Version 4 TLB with writeback cache.

config CPU_TLB_V4WBI
	bool
	help
	  ARM Architecture Version 4 TLB with writeback cache and invalidate
	  instruction cache entry.

config CPU_TLB_V6
	bool

comment "Processor Features"

config ARM_THUMB
	bool "Support Thumb user binaries"
	depends on CPU_ARM720T || CPU_ARM920T || CPU_ARM922T || CPU_ARM925T || CPU_ARM926T || CPU_ARM1020 || CPU_ARM1020E || CPU_ARM1022 || CPU_ARM1026 || CPU_XSCALE || CPU_V6
	default y
	help
	  Say Y if you want to include kernel support for running user space
	  Thumb binaries.

	  The Thumb instruction set is a compressed form of the standard ARM
	  instruction set resulting in smaller binaries at the expense of
	  slightly less efficient code.

	  If you don't know what this all is, saying Y is a safe choice.

config CPU_BIG_ENDIAN
	bool "Build big-endian kernel"
	depends on ARCH_SUPPORTS_BIG_ENDIAN
	help
	  Say Y if you plan on running a kernel in big-endian mode.
	  Note that your board must be properly built and your board
	  port must properly enable any big-endian related features
	  of your chipset/board/processor.

config CPU_ICACHE_DISABLE
	bool "Disable I-Cache"
	depends on CPU_ARM920T || CPU_ARM922T || CPU_ARM925T || CPU_ARM926T || CPU_ARM1020 || CPU_V6
	help
	  Say Y here to disable the processor instruction cache. Unless
	  you have a reason not to or are unsure, say N.

config CPU_DCACHE_DISABLE
	bool "Disable D-Cache"
	depends on CPU_ARM920T || CPU_ARM922T || CPU_ARM925T || CPU_ARM926T || CPU_ARM1020 || CPU_V6
	help
	  Say Y here to disable the processor data cache. Unless
	  you have a reason not to or are unsure, say N.

config CPU_DCACHE_WRITETHROUGH
	bool "Force write through D-cache"
	depends on (CPU_ARM920T || CPU_ARM922T || CPU_ARM925T || CPU_ARM926T || CPU_ARM1020 || CPU_V6) && !CPU_DCACHE_DISABLE
	default y if CPU_ARM925T
	help
	  Say Y here to use the data cache in writethrough mode. Unless you
	  specifically require this or are unsure, say N.

config CPU_CACHE_ROUND_ROBIN
	bool "Round robin I and D cache replacement algorithm"
	depends on (CPU_ARM926T || CPU_ARM1020) && (!CPU_ICACHE_DISABLE || !CPU_DCACHE_DISABLE)
	help
	  Say Y here to use the predictable round-robin cache replacement
	  policy.  Unless you specifically require this or are unsure, say N.

config CPU_BPREDICT_DISABLE
	bool "Disable branch prediction"
	depends on CPU_ARM1020 || CPU_V6
	help
	  Say Y here to disable branch prediction.  If unsure, say N.

config TLS_REG_EMUL
	bool
	default y if SMP && (CPU_32v5 || CPU_32v4 || CPU_32v3)
	help
	  An SMP system using a pre-ARMv6 processor (there are apparently
	  a few prototypes like that in existence) and therefore access to
	  that required register must be emulated.

config HAS_TLS_REG
	bool
	depends on !TLS_REG_EMUL
	default y if SMP || CPU_32v7
	help
	  This selects support for the CP15 thread register.
	  It is defined to be available on some ARMv6 processors (including
	  all SMP capable ARMv6's) or later processors.  User space may
	  assume directly accessing that register and always obtain the
	  expected value only on ARMv7 and above.

config NEEDS_SYSCALL_FOR_CMPXCHG
	bool
	default y if SMP && (CPU_32v5 || CPU_32v4 || CPU_32v3)
	help
	  SMP on a pre-ARMv6 processor?  Well OK then.
	  Forget about fast user space cmpxchg support.
	  It is just not possible.
Commit	Line	Data
1da177e4 LT	1	comment "Processor Type"
	2
	3	config CPU_32
	4	bool
	5	default y
	6
	7	# Select CPU types depending on the architecture selected. This selects
	8	# which CPUs we support in the kernel image, and the compiler instruction
	9	# optimiser behaviour.
	10
	11	# ARM610
	12	config CPU_ARM610
	13	bool "Support ARM610 processor"
	14	depends on ARCH_RPC
	15	select CPU_32v3
	16	select CPU_CACHE_V3
	17	select CPU_CACHE_VIVT
	18	select CPU_COPY_V3
	19	select CPU_TLB_V3
	20	help
	21	The ARM610 is the successor to the ARM3 processor
	22	and was produced by VLSI Technology Inc.
	23
	24	Say Y if you want support for the ARM610 processor.
	25	Otherwise, say N.
	26
	27	# ARM710
	28	config CPU_ARM710
	29	bool "Support ARM710 processor" if !ARCH_CLPS7500 && ARCH_RPC
	30	default y if ARCH_CLPS7500
	31	select CPU_32v3
	32	select CPU_CACHE_V3
	33	select CPU_CACHE_VIVT
	34	select CPU_COPY_V3
	35	select CPU_TLB_V3
	36	help
	37	A 32-bit RISC microprocessor based on the ARM7 processor core
	38	designed by Advanced RISC Machines Ltd. The ARM710 is the
	39	successor to the ARM610 processor. It was released in
	40	July 1994 by VLSI Technology Inc.
	41
	42	Say Y if you want support for the ARM710 processor.
	43	Otherwise, say N.
	44
	45	# ARM720T
	46	config CPU_ARM720T
	47	bool "Support ARM720T processor" if !ARCH_CLPS711X && !ARCH_L7200 && !ARCH_CDB89712 && ARCH_INTEGRATOR
	48	default y if ARCH_CLPS711X \|\| ARCH_L7200 \|\| ARCH_CDB89712 \|\| ARCH_H720X
	49	select CPU_32v4
	50	select CPU_ABRT_LV4T
	51	select CPU_CACHE_V4
	52	select CPU_CACHE_VIVT
	53	select CPU_COPY_V4WT
	54	select CPU_TLB_V4WT
	55	help
	56	A 32-bit RISC processor with 8kByte Cache, Write Buffer and
	57	MMU built around an ARM7TDMI core.
	58
	59	Say Y if you want support for the ARM720T processor.
	60	Otherwise, say N.
	61
	62	# ARM920T
	63	config CPU_ARM920T
	64	bool "Support ARM920T processor" if !ARCH_S3C2410
038c5b60	65	depends on ARCH_INTEGRATOR \|\| ARCH_S3C2410 \|\| ARCH_IMX \|\| ARCH_AAEC2000
1da177e4 LT	66	default y if ARCH_S3C2410
	67	select CPU_32v4
	68	select CPU_ABRT_EV4T
	69	select CPU_CACHE_V4WT
	70	select CPU_CACHE_VIVT
	71	select CPU_COPY_V4WB
	72	select CPU_TLB_V4WBI
	73	help
	74	The ARM920T is licensed to be produced by numerous vendors,
	75	and is used in the Maverick EP9312 and the Samsung S3C2410.
	76
	77	More information on the Maverick EP9312 at
	78	<http://linuxdevices.com/products/PD2382866068.html>.
	79
	80	Say Y if you want support for the ARM920T processor.
	81	Otherwise, say N.
	82
	83	# ARM922T
	84	config CPU_ARM922T
	85	bool "Support ARM922T processor" if ARCH_INTEGRATOR
	86	depends on ARCH_CAMELOT \|\| ARCH_LH7A40X \|\| ARCH_INTEGRATOR
	87	default y if ARCH_CAMELOT \|\| ARCH_LH7A40X
	88	select CPU_32v4
	89	select CPU_ABRT_EV4T
	90	select CPU_CACHE_V4WT
	91	select CPU_CACHE_VIVT
	92	select CPU_COPY_V4WB
	93	select CPU_TLB_V4WBI
	94	help
	95	The ARM922T is a version of the ARM920T, but with smaller
	96	instruction and data caches. It is used in Altera's
	97	Excalibur XA device family.
	98
	99	Say Y if you want support for the ARM922T processor.
	100	Otherwise, say N.
	101
	102	# ARM925T
	103	config CPU_ARM925T
b288f75f	104	bool "Support ARM925T processor" if ARCH_OMAP1
1da177e4 LT	105	depends on ARCH_OMAP1510
	106	default y if ARCH_OMAP1510
	107	select CPU_32v4
	108	select CPU_ABRT_EV4T
	109	select CPU_CACHE_V4WT
	110	select CPU_CACHE_VIVT
	111	select CPU_COPY_V4WB
	112	select CPU_TLB_V4WBI
	113	help
	114	The ARM925T is a mix between the ARM920T and ARM926T, but with
	115	different instruction and data caches. It is used in TI's OMAP
	116	device family.
	117
	118	Say Y if you want support for the ARM925T processor.
	119	Otherwise, say N.
	120
	121	# ARM926T
	122	config CPU_ARM926T
8ad68bbf CM	123	bool "Support ARM926T processor"
8ad68bbf CM	124	depends on ARCH_INTEGRATOR \|\| ARCH_VERSATILE_PB \|\| MACH_VERSATILE_AB \|\| ARCH_OMAP730 \|\| ARCH_OMAP16XX \|\| MACH_REALVIEW_EB
1da177e4 LT	125	default y if ARCH_VERSATILE_PB \|\| MACH_VERSATILE_AB \|\| ARCH_OMAP730 \|\| ARCH_OMAP16XX
	126	select CPU_32v5
	127	select CPU_ABRT_EV5TJ
	128	select CPU_CACHE_VIVT
	129	select CPU_COPY_V4WB
	130	select CPU_TLB_V4WBI
	131	help
	132	This is a variant of the ARM920. It has slightly different
	133	instruction sequences for cache and TLB operations. Curiously,
	134	there is no documentation on it at the ARM corporate website.
	135
	136	Say Y if you want support for the ARM926T processor.
	137	Otherwise, say N.
	138
	139	# ARM1020 - needs validating
	140	config CPU_ARM1020
	141	bool "Support ARM1020T (rev 0) processor"
	142	depends on ARCH_INTEGRATOR
	143	select CPU_32v5
	144	select CPU_ABRT_EV4T
	145	select CPU_CACHE_V4WT
	146	select CPU_CACHE_VIVT
	147	select CPU_COPY_V4WB
	148	select CPU_TLB_V4WBI
	149	help
	150	The ARM1020 is the 32K cached version of the ARM10 processor,
	151	with an addition of a floating-point unit.
	152
	153	Say Y if you want support for the ARM1020 processor.
	154	Otherwise, say N.
	155
	156	# ARM1020E - needs validating
	157	config CPU_ARM1020E
	158	bool "Support ARM1020E processor"
	159	depends on ARCH_INTEGRATOR
	160	select CPU_32v5
	161	select CPU_ABRT_EV4T
	162	select CPU_CACHE_V4WT
	163	select CPU_CACHE_VIVT
	164	select CPU_COPY_V4WB
	165	select CPU_TLB_V4WBI
	166	depends on n
	167
	168	# ARM1022E
	169	config CPU_ARM1022
	170	bool "Support ARM1022E processor"
	171	depends on ARCH_INTEGRATOR
	172	select CPU_32v5
	173	select CPU_ABRT_EV4T
	174	select CPU_CACHE_VIVT
	175	select CPU_COPY_V4WB # can probably do better
	176	select CPU_TLB_V4WBI
	177	help
	178	The ARM1022E is an implementation of the ARMv5TE architecture
	179	based upon the ARM10 integer core with a 16KiB L1 Harvard cache,
	180	embedded trace macrocell, and a floating-point unit.
	181
	182	Say Y if you want support for the ARM1022E processor.
	183	Otherwise, say N.
	184
	185	# ARM1026EJ-S
	186	config CPU_ARM1026
	187	bool "Support ARM1026EJ-S processor"
	188	depends on ARCH_INTEGRATOR
189	select CPU_32v5
190	select CPU_ABRT_EV5T # But need Jazelle, but EV5TJ ignores bit 10
191	select CPU_CACHE_VIVT
192	select CPU_COPY_V4WB # can probably do better
193	select CPU_TLB_V4WBI
194	help
195	The ARM1026EJ-S is an implementation of the ARMv5TEJ architecture
196	based upon the ARM10 integer core.
197
198	Say Y if you want support for the ARM1026EJ-S processor.
199	Otherwise, say N.
200
201	# SA110
202	config CPU_SA110
203	bool "Support StrongARM(R) SA-110 processor" if !ARCH_EBSA110 && !FOOTBRIDGE && !ARCH_TBOX && !ARCH_SHARK && !ARCH_NEXUSPCI && ARCH_RPC
204	default y if ARCH_EBSA110 \|\| FOOTBRIDGE \|\| ARCH_TBOX \|\| ARCH_SHARK \|\| ARCH_NEXUSPCI
205	select CPU_32v3 if ARCH_RPC
206	select CPU_32v4 if !ARCH_RPC
207	select CPU_ABRT_EV4
208	select CPU_CACHE_V4WB
209	select CPU_CACHE_VIVT
210	select CPU_COPY_V4WB
211	select CPU_TLB_V4WB
212	help
213	The Intel StrongARM(R) SA-110 is a 32-bit microprocessor and
214	is available at five speeds ranging from 100 MHz to 233 MHz.
215	More information is available at
216	<http://developer.intel.com/design/strong/sa110.htm>.
217
218	Say Y if you want support for the SA-110 processor.
219	Otherwise, say N.
220
221	# SA1100
222	config CPU_SA1100
223	bool
224	depends on ARCH_SA1100
225	default y
226	select CPU_32v4
227	select CPU_ABRT_EV4
228	select CPU_CACHE_V4WB
229	select CPU_CACHE_VIVT
230	select CPU_TLB_V4WB
1da177e4 LT	231
	232	# XScale
	233	config CPU_XSCALE
	234	bool
	235	depends on ARCH_IOP3XX \|\| ARCH_PXA \|\| ARCH_IXP4XX \|\| ARCH_IXP2000
	236	default y
	237	select CPU_32v5
	238	select CPU_ABRT_EV5T
	239	select CPU_CACHE_VIVT
	240	select CPU_TLB_V4WBI
1da177e4 LT	241
	242	# ARMv6
	243	config CPU_V6
	244	bool "Support ARM V6 processor"
8ad68bbf	245	depends on ARCH_INTEGRATOR \|\| MACH_REALVIEW_EB
1da177e4 LT	246	select CPU_32v6
	247	select CPU_ABRT_EV6
	248	select CPU_CACHE_V6
	249	select CPU_CACHE_VIPT
	250	select CPU_COPY_V6
	251	select CPU_TLB_V6
	252
4a5f79e7 RK	253	# ARMv6k
	254	config CPU_32v6K
	255	bool "Support ARM V6K processor extensions" if !SMP
	256	depends on CPU_V6
	257	default y if SMP
	258	help
	259	Say Y here if your ARMv6 processor supports the 'K' extension.
	260	This enables the kernel to use some instructions not present
	261	on previous processors, and as such a kernel build with this
	262	enabled will not boot on processors with do not support these
	263	instructions.
	264
1da177e4 LT	265	# Figure out what processor architecture version we should be using.
	266	# This defines the compiler instruction set which depends on the machine type.
	267	config CPU_32v3
	268	bool
	269
	270	config CPU_32v4
	271	bool
	272
	273	config CPU_32v5
	274	bool
	275
	276	config CPU_32v6
	277	bool
	278
	279	# The abort model
	280	config CPU_ABRT_EV4
	281	bool
	282
	283	config CPU_ABRT_EV4T
	284	bool
	285
	286	config CPU_ABRT_LV4T
	287	bool
	288
	289	config CPU_ABRT_EV5T
	290	bool
	291
	292	config CPU_ABRT_EV5TJ
	293	bool
	294
	295	config CPU_ABRT_EV6
	296	bool
	297
	298	# The cache model
	299	config CPU_CACHE_V3
	300	bool
	301
	302	config CPU_CACHE_V4
	303	bool
	304
	305	config CPU_CACHE_V4WT
	306	bool
	307
	308	config CPU_CACHE_V4WB
	309	bool
	310
	311	config CPU_CACHE_V6
	312	bool
	313
	314	config CPU_CACHE_VIVT
	315	bool
	316
	317	config CPU_CACHE_VIPT
	318	bool
	319
	320	# The copy-page model
	321	config CPU_COPY_V3
	322	bool
	323
	324	config CPU_COPY_V4WT
	325	bool
	326
	327	config CPU_COPY_V4WB
	328	bool
329
330	config CPU_COPY_V6
331	bool
332
333	# This selects the TLB model
334	config CPU_TLB_V3
335	bool
336	help
337	ARM Architecture Version 3 TLB.
338
339	config CPU_TLB_V4WT
340	bool
341	help
342	ARM Architecture Version 4 TLB with writethrough cache.
343
344	config CPU_TLB_V4WB
345	bool
346	help
347	ARM Architecture Version 4 TLB with writeback cache.
348
349	config CPU_TLB_V4WBI
350	bool
351	help
352	ARM Architecture Version 4 TLB with writeback cache and invalidate
353	instruction cache entry.
354
355	config CPU_TLB_V6
356	bool
357
1da177e4 LT	358	comment "Processor Features"
	359
	360	config ARM_THUMB
	361	bool "Support Thumb user binaries"
	362	depends on CPU_ARM720T \|\| CPU_ARM920T \|\| CPU_ARM922T \|\| CPU_ARM925T \|\| CPU_ARM926T \|\| CPU_ARM1020 \|\| CPU_ARM1020E \|\| CPU_ARM1022 \|\| CPU_ARM1026 \|\| CPU_XSCALE \|\| CPU_V6
	363	default y
	364	help
	365	Say Y if you want to include kernel support for running user space
	366	Thumb binaries.
	367
	368	The Thumb instruction set is a compressed form of the standard ARM
	369	instruction set resulting in smaller binaries at the expense of
	370	slightly less efficient code.
	371
	372	If you don't know what this all is, saying Y is a safe choice.
	373
	374	config CPU_BIG_ENDIAN
	375	bool "Build big-endian kernel"
	376	depends on ARCH_SUPPORTS_BIG_ENDIAN
	377	help
	378	Say Y if you plan on running a kernel in big-endian mode.
	379	Note that your board must be properly built and your board
	380	port must properly enable any big-endian related features
	381	of your chipset/board/processor.
	382
	383	config CPU_ICACHE_DISABLE
	384	bool "Disable I-Cache"
e03eb527	385	depends on CPU_ARM920T \|\| CPU_ARM922T \|\| CPU_ARM925T \|\| CPU_ARM926T \|\| CPU_ARM1020 \|\| CPU_V6
1da177e4 LT	386	help
	387	Say Y here to disable the processor instruction cache. Unless
	388	you have a reason not to or are unsure, say N.
	389
	390	config CPU_DCACHE_DISABLE
	391	bool "Disable D-Cache"
e03eb527	392	depends on CPU_ARM920T \|\| CPU_ARM922T \|\| CPU_ARM925T \|\| CPU_ARM926T \|\| CPU_ARM1020 \|\| CPU_V6
1da177e4 LT	393	help
	394	Say Y here to disable the processor data cache. Unless
	395	you have a reason not to or are unsure, say N.
	396
	397	config CPU_DCACHE_WRITETHROUGH
	398	bool "Force write through D-cache"
e03eb527	399	depends on (CPU_ARM920T \|\| CPU_ARM922T \|\| CPU_ARM925T \|\| CPU_ARM926T \|\| CPU_ARM1020 \|\| CPU_V6) && !CPU_DCACHE_DISABLE
1da177e4 LT	400	default y if CPU_ARM925T
	401	help
	402	Say Y here to use the data cache in writethrough mode. Unless you
	403	specifically require this or are unsure, say N.
	404
	405	config CPU_CACHE_ROUND_ROBIN
	406	bool "Round robin I and D cache replacement algorithm"
	407	depends on (CPU_ARM926T \|\| CPU_ARM1020) && (!CPU_ICACHE_DISABLE \|\| !CPU_DCACHE_DISABLE)
	408	help
	409	Say Y here to use the predictable round-robin cache replacement
	410	policy. Unless you specifically require this or are unsure, say N.
	411
	412	config CPU_BPREDICT_DISABLE
	413	bool "Disable branch prediction"
e03eb527	414	depends on CPU_ARM1020 \|\| CPU_V6
1da177e4 LT	415	help
1da177e4 LT	416	Say Y here to disable branch prediction. If unsure, say N.
2d2669b6	417
4b0e07a5 NP	418	config TLS_REG_EMUL
4b0e07a5 NP	419	bool
70489c88	420	default y if SMP && (CPU_32v5 \|\| CPU_32v4 \|\| CPU_32v3)
4b0e07a5	421	help
70489c88 NP	422	An SMP system using a pre-ARMv6 processor (there are apparently
	423	a few prototypes like that in existence) and therefore access to
	424	that required register must be emulated.
4b0e07a5	425
2d2669b6 NP	426	config HAS_TLS_REG
2d2669b6 NP	427	bool
70489c88 NP	428	depends on !TLS_REG_EMUL
70489c88 NP	429	default y if SMP \|\| CPU_32v7
2d2669b6 NP	430	help
2d2669b6 NP	431	This selects support for the CP15 thread register.
70489c88 NP	432	It is defined to be available on some ARMv6 processors (including
	433	all SMP capable ARMv6's) or later processors. User space may
	434	assume directly accessing that register and always obtain the
	435	expected value only on ARMv7 and above.
2d2669b6	436
dcef1f63 NP	437	config NEEDS_SYSCALL_FOR_CMPXCHG
	438	bool
	439	default y if SMP && (CPU_32v5 \|\| CPU_32v4 \|\| CPU_32v3)
	440	help
	441	SMP on a pre-ARMv6 processor? Well OK then.
	442	Forget about fast user space cmpxchg support.
	443	It is just not possible.
	444