[linux.git] / arch / i386 / Kconfig.cpu

# Put here option for CPU selection and depending optimization
if !X86_ELAN

choice
	prompt "Processor family"
	default M686

config M386
	bool "386"
	---help---
	  This is the processor type of your CPU. This information is used for
	  optimizing purposes. In order to compile a kernel that can run on
	  all x86 CPU types (albeit not optimally fast), you can specify
	  "386" here.

	  The kernel will not necessarily run on earlier architectures than
	  the one you have chosen, e.g. a Pentium optimized kernel will run on
	  a PPro, but not necessarily on a i486.

	  Here are the settings recommended for greatest speed:
	  - "386" for the AMD/Cyrix/Intel 386DX/DXL/SL/SLC/SX, Cyrix/TI
	  486DLC/DLC2, UMC 486SX-S and NexGen Nx586.  Only "386" kernels
	  will run on a 386 class machine.
	  - "486" for the AMD/Cyrix/IBM/Intel 486DX/DX2/DX4 or
	  SL/SLC/SLC2/SLC3/SX/SX2 and UMC U5D or U5S.
	  - "586" for generic Pentium CPUs lacking the TSC
	  (time stamp counter) register.
	  - "Pentium-Classic" for the Intel Pentium.
	  - "Pentium-MMX" for the Intel Pentium MMX.
	  - "Pentium-Pro" for the Intel Pentium Pro.
	  - "Pentium-II" for the Intel Pentium II or pre-Coppermine Celeron.
	  - "Pentium-III" for the Intel Pentium III or Coppermine Celeron.
	  - "Pentium-4" for the Intel Pentium 4 or P4-based Celeron.
	  - "K6" for the AMD K6, K6-II and K6-III (aka K6-3D).
	  - "Athlon" for the AMD K7 family (Athlon/Duron/Thunderbird).
	  - "Crusoe" for the Transmeta Crusoe series.
	  - "Efficeon" for the Transmeta Efficeon series.
	  - "Winchip-C6" for original IDT Winchip.
	  - "Winchip-2" for IDT Winchip 2.
	  - "Winchip-2A" for IDT Winchips with 3dNow! capabilities.
	  - "GeodeGX1" for Geode GX1 (Cyrix MediaGX).
	  - "Geode GX/LX" For AMD Geode GX and LX processors.
	  - "CyrixIII/VIA C3" for VIA Cyrix III or VIA C3.
	  - "VIA C3-2 for VIA C3-2 "Nehemiah" (model 9 and above).

	  If you don't know what to do, choose "386".

config M486
	bool "486"
	help
	  Select this for a 486 series processor, either Intel or one of the
	  compatible processors from AMD, Cyrix, IBM, or Intel.  Includes DX,
	  DX2, and DX4 variants; also SL/SLC/SLC2/SLC3/SX/SX2 and UMC U5D or
	  U5S.

config M586
	bool "586/K5/5x86/6x86/6x86MX"
	help
	  Select this for an 586 or 686 series processor such as the AMD K5,
	  the Cyrix 5x86, 6x86 and 6x86MX.  This choice does not
	  assume the RDTSC (Read Time Stamp Counter) instruction.

config M586TSC
	bool "Pentium-Classic"
	help
	  Select this for a Pentium Classic processor with the RDTSC (Read
	  Time Stamp Counter) instruction for benchmarking.

config M586MMX
	bool "Pentium-MMX"
	help
	  Select this for a Pentium with the MMX graphics/multimedia
	  extended instructions.

config M686
	bool "Pentium-Pro"
	help
	  Select this for Intel Pentium Pro chips.  This enables the use of
	  Pentium Pro extended instructions, and disables the init-time guard
	  against the f00f bug found in earlier Pentiums.

config MPENTIUMII
	bool "Pentium-II/Celeron(pre-Coppermine)"
	help
	  Select this for Intel chips based on the Pentium-II and
	  pre-Coppermine Celeron core.  This option enables an unaligned
	  copy optimization, compiles the kernel with optimization flags
	  tailored for the chip, and applies any applicable Pentium Pro
	  optimizations.

config MPENTIUMIII
	bool "Pentium-III/Celeron(Coppermine)/Pentium-III Xeon"
	help
	  Select this for Intel chips based on the Pentium-III and
	  Celeron-Coppermine core.  This option enables use of some
	  extended prefetch instructions in addition to the Pentium II
	  extensions.

config MPENTIUMM
	bool "Pentium M"
	help
	  Select this for Intel Pentium M (not Pentium-4 M)
	  notebook chips.

config MPENTIUM4
	bool "Pentium-4/Celeron(P4-based)/Pentium-4 M/Xeon"
	help
	  Select this for Intel Pentium 4 chips.  This includes the
	  Pentium 4, P4-based Celeron and Xeon, and Pentium-4 M
	  (not Pentium M) chips.  This option enables compile flags
	  optimized for the chip, uses the correct cache shift, and
	  applies any applicable Pentium III optimizations.

config MK6
	bool "K6/K6-II/K6-III"
	help
	  Select this for an AMD K6-family processor.  Enables use of
	  some extended instructions, and passes appropriate optimization
	  flags to GCC.

config MK7
	bool "Athlon/Duron/K7"
	help
	  Select this for an AMD Athlon K7-family processor.  Enables use of
	  some extended instructions, and passes appropriate optimization
	  flags to GCC.

config MK8
	bool "Opteron/Athlon64/Hammer/K8"
	help
	  Select this for an AMD Opteron or Athlon64 Hammer-family processor.  Enables
	  use of some extended instructions, and passes appropriate optimization
	  flags to GCC.

config MCRUSOE
	bool "Crusoe"
	help
	  Select this for a Transmeta Crusoe processor.  Treats the processor
	  like a 586 with TSC, and sets some GCC optimization flags (like a
	  Pentium Pro with no alignment requirements).

config MEFFICEON
	bool "Efficeon"
	help
	  Select this for a Transmeta Efficeon processor.

config MWINCHIPC6
	bool "Winchip-C6"
	help
	  Select this for an IDT Winchip C6 chip.  Linux and GCC
	  treat this chip as a 586TSC with some extended instructions
	  and alignment requirements.

config MWINCHIP2
	bool "Winchip-2"
	help
	  Select this for an IDT Winchip-2.  Linux and GCC
	  treat this chip as a 586TSC with some extended instructions
	  and alignment requirements.

config MWINCHIP3D
	bool "Winchip-2A/Winchip-3"
	help
	  Select this for an IDT Winchip-2A or 3.  Linux and GCC
	  treat this chip as a 586TSC with some extended instructions
	  and alignment reqirements.  Also enable out of order memory
	  stores for this CPU, which can increase performance of some
	  operations.

config MGEODEGX1
	bool "GeodeGX1"
	help
	  Select this for a Geode GX1 (Cyrix MediaGX) chip.

config MGEODE_LX
       bool "Geode GX/LX"
       help
         Select this for AMD Geode GX and LX processors.

config MCYRIXIII
	bool "CyrixIII/VIA-C3"
	help
	  Select this for a Cyrix III or C3 chip.  Presently Linux and GCC
	  treat this chip as a generic 586. Whilst the CPU is 686 class,
	  it lacks the cmov extension which gcc assumes is present when
	  generating 686 code.
	  Note that Nehemiah (Model 9) and above will not boot with this
	  kernel due to them lacking the 3DNow! instructions used in earlier
	  incarnations of the CPU.

config MVIAC3_2
	bool "VIA C3-2 (Nehemiah)"
	help
	  Select this for a VIA C3 "Nehemiah". Selecting this enables usage
	  of SSE and tells gcc to treat the CPU as a 686.
	  Note, this kernel will not boot on older (pre model 9) C3s.

endchoice

config X86_GENERIC
       bool "Generic x86 support"
       help
	  Instead of just including optimizations for the selected
	  x86 variant (e.g. PII, Crusoe or Athlon), include some more
	  generic optimizations as well. This will make the kernel
	  perform better on x86 CPUs other than that selected.

	  This is really intended for distributors who need more
	  generic optimizations.

endif

#
# Define implied options from the CPU selection here
#
config X86_CMPXCHG
	bool
	depends on !M386
	default y

config X86_XADD
	bool
	depends on !M386
	default y

config X86_L1_CACHE_SHIFT
	int
	default "7" if MPENTIUM4 || X86_GENERIC
	default "4" if X86_ELAN || M486 || M386 || MGEODEGX1
	default "5" if MWINCHIP3D || MWINCHIP2 || MWINCHIPC6 || MCRUSOE || MEFFICEON || MCYRIXIII || MK6 || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || M586 || MVIAC3_2 || MGEODE_LX
	default "6" if MK7 || MK8 || MPENTIUMM

config RWSEM_GENERIC_SPINLOCK
	bool
	depends on M386
	default y

config RWSEM_XCHGADD_ALGORITHM
	bool
	depends on !M386
	default y

config GENERIC_CALIBRATE_DELAY
	bool
	default y

config X86_PPRO_FENCE
	bool
	depends on M686 || M586MMX || M586TSC || M586 || M486 || M386 || MGEODEGX1
	default y

config X86_F00F_BUG
	bool
	depends on M586MMX || M586TSC || M586 || M486 || M386
	default y

config X86_WP_WORKS_OK
	bool
	depends on !M386
	default y

config X86_INVLPG
	bool
	depends on !M386
	default y

config X86_BSWAP
	bool
	depends on !M386
	default y

config X86_POPAD_OK
	bool
	depends on !M386
	default y

config X86_CMPXCHG64
	bool
	depends on !M386 && !M486
	default y

config X86_ALIGNMENT_16
	bool
	depends on MWINCHIP3D || MWINCHIP2 || MWINCHIPC6 || MCYRIXIII || X86_ELAN || MK6 || M586MMX || M586TSC || M586 || M486 || MVIAC3_2 || MGEODEGX1
	default y

config X86_GOOD_APIC
	bool
	depends on MK7 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || MK8 || MEFFICEON
	default y

config X86_INTEL_USERCOPY
	bool
	depends on MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M586MMX || X86_GENERIC || MK8 || MK7 || MEFFICEON
	default y

config X86_USE_PPRO_CHECKSUM
	bool
	depends on MWINCHIP3D || MWINCHIP2 || MWINCHIPC6 || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || MK8 || MVIAC3_2 || MEFFICEON || MGEODE_LX
	default y

config X86_USE_3DNOW
	bool
	depends on MCYRIXIII || MK7 || MGEODE_LX
	default y

config X86_OOSTORE
	bool
	depends on (MWINCHIP3D || MWINCHIP2 || MWINCHIPC6) && MTRR
	default y

config X86_TSC
	bool
	depends on (MWINCHIP3D || MWINCHIP2 || MCRUSOE || MEFFICEON || MCYRIXIII || MK7 || MK6 || MPENTIUM4 || MPENTIUMM || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || MK8 || MVIAC3_2 || MGEODEGX1 || MGEODE_LX) && !X86_NUMAQ
	default y
Commit	Line	Data
96d55b88 PBG	1	# Put here option for CPU selection and depending optimization
	2	if !X86_ELAN
	3
	4	choice
	5	prompt "Processor family"
	6	default M686
	7
	8	config M386
	9	bool "386"
	10	---help---
	11	This is the processor type of your CPU. This information is used for
	12	optimizing purposes. In order to compile a kernel that can run on
	13	all x86 CPU types (albeit not optimally fast), you can specify
	14	"386" here.
	15
	16	The kernel will not necessarily run on earlier architectures than
	17	the one you have chosen, e.g. a Pentium optimized kernel will run on
	18	a PPro, but not necessarily on a i486.
	19
	20	Here are the settings recommended for greatest speed:
	21	- "386" for the AMD/Cyrix/Intel 386DX/DXL/SL/SLC/SX, Cyrix/TI
	22	486DLC/DLC2, UMC 486SX-S and NexGen Nx586. Only "386" kernels
	23	will run on a 386 class machine.
	24	- "486" for the AMD/Cyrix/IBM/Intel 486DX/DX2/DX4 or
	25	SL/SLC/SLC2/SLC3/SX/SX2 and UMC U5D or U5S.
	26	- "586" for generic Pentium CPUs lacking the TSC
	27	(time stamp counter) register.
	28	- "Pentium-Classic" for the Intel Pentium.
	29	- "Pentium-MMX" for the Intel Pentium MMX.
	30	- "Pentium-Pro" for the Intel Pentium Pro.
	31	- "Pentium-II" for the Intel Pentium II or pre-Coppermine Celeron.
	32	- "Pentium-III" for the Intel Pentium III or Coppermine Celeron.
	33	- "Pentium-4" for the Intel Pentium 4 or P4-based Celeron.
	34	- "K6" for the AMD K6, K6-II and K6-III (aka K6-3D).
	35	- "Athlon" for the AMD K7 family (Athlon/Duron/Thunderbird).
	36	- "Crusoe" for the Transmeta Crusoe series.
	37	- "Efficeon" for the Transmeta Efficeon series.
	38	- "Winchip-C6" for original IDT Winchip.
	39	- "Winchip-2" for IDT Winchip 2.
	40	- "Winchip-2A" for IDT Winchips with 3dNow! capabilities.
	41	- "GeodeGX1" for Geode GX1 (Cyrix MediaGX).
f90b8116	42	- "Geode GX/LX" For AMD Geode GX and LX processors.
96d55b88 PBG	43	- "CyrixIII/VIA C3" for VIA Cyrix III or VIA C3.
	44	- "VIA C3-2 for VIA C3-2 "Nehemiah" (model 9 and above).
	45
	46	If you don't know what to do, choose "386".
	47
	48	config M486
	49	bool "486"
	50	help
	51	Select this for a 486 series processor, either Intel or one of the
	52	compatible processors from AMD, Cyrix, IBM, or Intel. Includes DX,
	53	DX2, and DX4 variants; also SL/SLC/SLC2/SLC3/SX/SX2 and UMC U5D or
	54	U5S.
	55
	56	config M586
	57	bool "586/K5/5x86/6x86/6x86MX"
	58	help
	59	Select this for an 586 or 686 series processor such as the AMD K5,
	60	the Cyrix 5x86, 6x86 and 6x86MX. This choice does not
	61	assume the RDTSC (Read Time Stamp Counter) instruction.
	62
	63	config M586TSC
	64	bool "Pentium-Classic"
	65	help
	66	Select this for a Pentium Classic processor with the RDTSC (Read
	67	Time Stamp Counter) instruction for benchmarking.
	68
	69	config M586MMX
	70	bool "Pentium-MMX"
	71	help
	72	Select this for a Pentium with the MMX graphics/multimedia
	73	extended instructions.
	74
	75	config M686
	76	bool "Pentium-Pro"
	77	help
	78	Select this for Intel Pentium Pro chips. This enables the use of
	79	Pentium Pro extended instructions, and disables the init-time guard
	80	against the f00f bug found in earlier Pentiums.
	81
	82	config MPENTIUMII
	83	bool "Pentium-II/Celeron(pre-Coppermine)"
	84	help
	85	Select this for Intel chips based on the Pentium-II and
	86	pre-Coppermine Celeron core. This option enables an unaligned
	87	copy optimization, compiles the kernel with optimization flags
	88	tailored for the chip, and applies any applicable Pentium Pro
	89	optimizations.
	90
	91	config MPENTIUMIII
	92	bool "Pentium-III/Celeron(Coppermine)/Pentium-III Xeon"
	93	help
	94	Select this for Intel chips based on the Pentium-III and
	95	Celeron-Coppermine core. This option enables use of some
	96	extended prefetch instructions in addition to the Pentium II
	97	extensions.
	98
	99	config MPENTIUMM
	100	bool "Pentium M"
	101	help
	102	Select this for Intel Pentium M (not Pentium-4 M)
	103	notebook chips.
	104
	105	config MPENTIUM4
	106	bool "Pentium-4/Celeron(P4-based)/Pentium-4 M/Xeon"
107	help
108	Select this for Intel Pentium 4 chips. This includes the
109	Pentium 4, P4-based Celeron and Xeon, and Pentium-4 M
110	(not Pentium M) chips. This option enables compile flags
111	optimized for the chip, uses the correct cache shift, and
112	applies any applicable Pentium III optimizations.
113
114	config MK6
115	bool "K6/K6-II/K6-III"
116	help
117	Select this for an AMD K6-family processor. Enables use of
118	some extended instructions, and passes appropriate optimization
119	flags to GCC.
120
121	config MK7
122	bool "Athlon/Duron/K7"
123	help
124	Select this for an AMD Athlon K7-family processor. Enables use of
125	some extended instructions, and passes appropriate optimization
126	flags to GCC.
127
128	config MK8
129	bool "Opteron/Athlon64/Hammer/K8"
130	help
131	Select this for an AMD Opteron or Athlon64 Hammer-family processor. Enables
132	use of some extended instructions, and passes appropriate optimization
133	flags to GCC.
134
135	config MCRUSOE
136	bool "Crusoe"
137	help
138	Select this for a Transmeta Crusoe processor. Treats the processor
139	like a 586 with TSC, and sets some GCC optimization flags (like a
140	Pentium Pro with no alignment requirements).
141
142	config MEFFICEON
143	bool "Efficeon"
144	help
145	Select this for a Transmeta Efficeon processor.
146
147	config MWINCHIPC6
148	bool "Winchip-C6"
149	help
150	Select this for an IDT Winchip C6 chip. Linux and GCC
151	treat this chip as a 586TSC with some extended instructions
152	and alignment requirements.
153
154	config MWINCHIP2
155	bool "Winchip-2"
156	help
157	Select this for an IDT Winchip-2. Linux and GCC
158	treat this chip as a 586TSC with some extended instructions
159	and alignment requirements.
160
161	config MWINCHIP3D
162	bool "Winchip-2A/Winchip-3"
163	help
164	Select this for an IDT Winchip-2A or 3. Linux and GCC
165	treat this chip as a 586TSC with some extended instructions
166	and alignment reqirements. Also enable out of order memory
167	stores for this CPU, which can increase performance of some
168	operations.
169
170	config MGEODEGX1
171	bool "GeodeGX1"
172	help
173	Select this for a Geode GX1 (Cyrix MediaGX) chip.
174
f90b8116 JC	175	config MGEODE_LX
	176	bool "Geode GX/LX"
	177	help
	178	Select this for AMD Geode GX and LX processors.
	179
96d55b88 PBG	180	config MCYRIXIII
	181	bool "CyrixIII/VIA-C3"
	182	help
	183	Select this for a Cyrix III or C3 chip. Presently Linux and GCC
	184	treat this chip as a generic 586. Whilst the CPU is 686 class,
	185	it lacks the cmov extension which gcc assumes is present when
	186	generating 686 code.
	187	Note that Nehemiah (Model 9) and above will not boot with this
	188	kernel due to them lacking the 3DNow! instructions used in earlier
	189	incarnations of the CPU.
	190
	191	config MVIAC3_2
	192	bool "VIA C3-2 (Nehemiah)"
	193	help
	194	Select this for a VIA C3 "Nehemiah". Selecting this enables usage
	195	of SSE and tells gcc to treat the CPU as a 686.
	196	Note, this kernel will not boot on older (pre model 9) C3s.
	197
	198	endchoice
	199
	200	config X86_GENERIC
	201	bool "Generic x86 support"
	202	help
	203	Instead of just including optimizations for the selected
	204	x86 variant (e.g. PII, Crusoe or Athlon), include some more
	205	generic optimizations as well. This will make the kernel
	206	perform better on x86 CPUs other than that selected.
	207
	208	This is really intended for distributors who need more
	209	generic optimizations.
	210
	211	endif
	212
	213	#
	214	# Define implied options from the CPU selection here
	215	#
	216	config X86_CMPXCHG
	217	bool
	218	depends on !M386
	219	default y
	220
	221	config X86_XADD
	222	bool
	223	depends on !M386
	224	default y
	225
	226	config X86_L1_CACHE_SHIFT
	227	int
	228	default "7" if MPENTIUM4 \|\| X86_GENERIC
f90b8116 JC	229	default "4" if X86_ELAN \|\| M486 \|\| M386 \|\| MGEODEGX1
f90b8116 JC	230	default "5" if MWINCHIP3D \|\| MWINCHIP2 \|\| MWINCHIPC6 \|\| MCRUSOE \|\| MEFFICEON \|\| MCYRIXIII \|\| MK6 \|\| MPENTIUMIII \|\| MPENTIUMII \|\| M686 \|\| M586MMX \|\| M586TSC \|\| M586 \|\| MVIAC3_2 \|\| MGEODE_LX
96d55b88 PBG	231	default "6" if MK7 \|\| MK8 \|\| MPENTIUMM
	232
	233	config RWSEM_GENERIC_SPINLOCK
	234	bool
	235	depends on M386
	236	default y
	237
	238	config RWSEM_XCHGADD_ALGORITHM
	239	bool
	240	depends on !M386
	241	default y
	242
	243	config GENERIC_CALIBRATE_DELAY
	244	bool
	245	default y
	246
	247	config X86_PPRO_FENCE
	248	bool
	249	depends on M686 \|\| M586MMX \|\| M586TSC \|\| M586 \|\| M486 \|\| M386 \|\| MGEODEGX1
	250	default y
	251
	252	config X86_F00F_BUG
	253	bool
	254	depends on M586MMX \|\| M586TSC \|\| M586 \|\| M486 \|\| M386
	255	default y
	256
	257	config X86_WP_WORKS_OK
	258	bool
	259	depends on !M386
	260	default y
	261
	262	config X86_INVLPG
	263	bool
	264	depends on !M386
	265	default y
	266
	267	config X86_BSWAP
	268	bool
	269	depends on !M386
	270	default y
	271
	272	config X86_POPAD_OK
	273	bool
	274	depends on !M386
	275	default y
	276
	277	config X86_CMPXCHG64
	278	bool
	279	depends on !M386 && !M486
	280	default y
	281
	282	config X86_ALIGNMENT_16
	283	bool
	284	depends on MWINCHIP3D \|\| MWINCHIP2 \|\| MWINCHIPC6 \|\| MCYRIXIII \|\| X86_ELAN \|\| MK6 \|\| M586MMX \|\| M586TSC \|\| M586 \|\| M486 \|\| MVIAC3_2 \|\| MGEODEGX1
	285	default y
	286
	287	config X86_GOOD_APIC
	288	bool
	289	depends on MK7 \|\| MPENTIUM4 \|\| MPENTIUMM \|\| MPENTIUMIII \|\| MPENTIUMII \|\| M686 \|\| M586MMX \|\| MK8 \|\| MEFFICEON
	290	default y
	291
	292	config X86_INTEL_USERCOPY
	293	bool
	294	depends on MPENTIUM4 \|\| MPENTIUMM \|\| MPENTIUMIII \|\| MPENTIUMII \|\| M586MMX \|\| X86_GENERIC \|\| MK8 \|\| MK7 \|\| MEFFICEON
295	default y
296
297	config X86_USE_PPRO_CHECKSUM
298	bool
f90b8116	299	depends on MWINCHIP3D \|\| MWINCHIP2 \|\| MWINCHIPC6 \|\| MCYRIXIII \|\| MK7 \|\| MK6 \|\| MPENTIUM4 \|\| MPENTIUMM \|\| MPENTIUMIII \|\| MPENTIUMII \|\| M686 \|\| MK8 \|\| MVIAC3_2 \|\| MEFFICEON \|\| MGEODE_LX
96d55b88 PBG	300	default y
	301
	302	config X86_USE_3DNOW
	303	bool
f90b8116	304	depends on MCYRIXIII \|\| MK7 \|\| MGEODE_LX
96d55b88 PBG	305	default y
	306
	307	config X86_OOSTORE
	308	bool
	309	depends on (MWINCHIP3D \|\| MWINCHIP2 \|\| MWINCHIPC6) && MTRR
	310	default y
	311
	312	config X86_TSC
	313	bool
1c08ca89	314	depends on (MWINCHIP3D \|\| MWINCHIP2 \|\| MCRUSOE \|\| MEFFICEON \|\| MCYRIXIII \|\| MK7 \|\| MK6 \|\| MPENTIUM4 \|\| MPENTIUMM \|\| MPENTIUMIII \|\| MPENTIUMII \|\| M686 \|\| M586MMX \|\| M586TSC \|\| MK8 \|\| MVIAC3_2 \|\| MGEODEGX1 \|\| MGEODE_LX) && !X86_NUMAQ
96d55b88	315	default y