[deliverable/linux.git] / arch / m68k / Kconfig.cpu

comment "Processor Type"

choice
	prompt "CPU family support"
	default M68KCLASSIC if MMU
	default COLDFIRE if !MMU
	help
	  The Freescale (was Motorola) M68K family of processors implements
	  the full 68000 processor instruction set.
	  The Freescale ColdFire family of processors is a modern derivative
	  of the 68000 processor family. They are mainly targeted at embedded
	  applications, and are all System-On-Chip (SOC) devices, as opposed
	  to stand alone CPUs. They implement a subset of the original 68000
	  processor instruction set.
	  If you anticipate running this kernel on a computer with a classic
	  MC68xxx processor, select M68KCLASSIC.
	  If you anticipate running this kernel on a computer with a ColdFire
	  processor, select COLDFIRE.

config M68KCLASSIC
	bool "Classic M68K CPU family support"

config COLDFIRE
	bool "Coldfire CPU family support"
	select GENERIC_GPIO
	select ARCH_WANT_OPTIONAL_GPIOLIB
	select ARCH_HAVE_CUSTOM_GPIO_H
	select CPU_HAS_NO_BITFIELDS
	select CPU_HAS_NO_MULDIV64
	select GENERIC_CSUM
	select HAVE_CLK

endchoice

if M68KCLASSIC

config M68000
	bool "MC68000"
	depends on !MMU
	select CPU_HAS_NO_BITFIELDS
	select CPU_HAS_NO_MULDIV64
	select CPU_HAS_NO_UNALIGNED
	select GENERIC_CSUM
	help
	  The Freescale (was Motorola) 68000 CPU is the first generation of
	  the well known M68K family of processors. The CPU core as well as
	  being available as a stand alone CPU was also used in many
	  System-On-Chip devices (eg 68328, 68302, etc). It does not contain
	  a paging MMU.

config MCPU32
	bool
	select CPU_HAS_NO_BITFIELDS
	select CPU_HAS_NO_UNALIGNED
	help
	  The Freescale (was then Motorola) CPU32 is a CPU core that is
	  based on the 68020 processor. For the most part it is used in
	  System-On-Chip parts, and does not contain a paging MMU.

config M68020
	bool "68020 support"
	depends on MMU
	select CPU_HAS_ADDRESS_SPACES
	help
	  If you anticipate running this kernel on a computer with a MC68020
	  processor, say Y. Otherwise, say N. Note that the 68020 requires a
	  68851 MMU (Memory Management Unit) to run Linux/m68k, except on the
	  Sun 3, which provides its own version.

config M68030
	bool "68030 support"
	depends on MMU && !MMU_SUN3
	select CPU_HAS_ADDRESS_SPACES
	help
	  If you anticipate running this kernel on a computer with a MC68030
	  processor, say Y. Otherwise, say N. Note that a MC68EC030 will not
	  work, as it does not include an MMU (Memory Management Unit).

config M68040
	bool "68040 support"
	depends on MMU && !MMU_SUN3
	select CPU_HAS_ADDRESS_SPACES
	help
	  If you anticipate running this kernel on a computer with a MC68LC040
	  or MC68040 processor, say Y. Otherwise, say N. Note that an
	  MC68EC040 will not work, as it does not include an MMU (Memory
	  Management Unit).

config M68060
	bool "68060 support"
	depends on MMU && !MMU_SUN3
	select CPU_HAS_ADDRESS_SPACES
	help
	  If you anticipate running this kernel on a computer with a MC68060
	  processor, say Y. Otherwise, say N.

config M68328
	bool "MC68328"
	depends on !MMU
	select M68000
	help
	  Motorola 68328 processor support.

config M68EZ328
	bool "MC68EZ328"
	depends on !MMU
	select M68000
	help
	  Motorola 68EX328 processor support.

config M68VZ328
	bool "MC68VZ328"
	depends on !MMU
	select M68000
	help
	  Motorola 68VZ328 processor support.

config M68360
	bool "MC68360"
	depends on !MMU
	select MCPU32
	help
	  Motorola 68360 processor support.

endif # M68KCLASSIC

if COLDFIRE

config M5206
	bool "MCF5206"
	depends on !MMU
	select COLDFIRE_SW_A7
	select HAVE_MBAR
	help
	  Motorola ColdFire 5206 processor support.

config M5206e
	bool "MCF5206e"
	depends on !MMU
	select COLDFIRE_SW_A7
	select HAVE_MBAR
	help
	  Motorola ColdFire 5206e processor support.

config M520x
	bool "MCF520x"
	depends on !MMU
	select GENERIC_CLOCKEVENTS
	select HAVE_CACHE_SPLIT
	help
	   Freescale Coldfire 5207/5208 processor support.

config M523x
	bool "MCF523x"
	depends on !MMU
	select GENERIC_CLOCKEVENTS
	select HAVE_CACHE_SPLIT
	select HAVE_IPSBAR
	help
	  Freescale Coldfire 5230/1/2/4/5 processor support

config M5249
	bool "MCF5249"
	depends on !MMU
	select COLDFIRE_SW_A7
	select HAVE_MBAR
	help
	  Motorola ColdFire 5249 processor support.

config M525x
	bool "MCF525x"
	depends on !MMU
	select COLDFIRE_SW_A7
	select HAVE_MBAR
	help
	  Freescale (Motorola) Coldfire 5251/5253 processor support.

config M527x
	bool

config M5271
	bool "MCF5271"
	depends on !MMU
	select M527x
	select HAVE_CACHE_SPLIT
	select HAVE_IPSBAR
	select GENERIC_CLOCKEVENTS
	help
	  Freescale (Motorola) ColdFire 5270/5271 processor support.

config M5272
	bool "MCF5272"
	depends on !MMU
	select COLDFIRE_SW_A7
	select HAVE_MBAR
	help
	  Motorola ColdFire 5272 processor support.

config M5275
	bool "MCF5275"
	depends on !MMU
	select M527x
	select HAVE_CACHE_SPLIT
	select HAVE_IPSBAR
	select GENERIC_CLOCKEVENTS
	help
	  Freescale (Motorola) ColdFire 5274/5275 processor support.

config M528x
	bool "MCF528x"
	depends on !MMU
	select GENERIC_CLOCKEVENTS
	select HAVE_CACHE_SPLIT
	select HAVE_IPSBAR
	help
	  Motorola ColdFire 5280/5282 processor support.

config M5307
	bool "MCF5307"
	depends on !MMU
	select COLDFIRE_SW_A7
	select HAVE_CACHE_CB
	select HAVE_MBAR
	help
	  Motorola ColdFire 5307 processor support.

config M532x
	bool "MCF532x"
	depends on !MMU
	select HAVE_CACHE_CB
	help
	  Freescale (Motorola) ColdFire 532x processor support.

config M5407
	bool "MCF5407"
	depends on !MMU
	select COLDFIRE_SW_A7
	select HAVE_CACHE_CB
	select HAVE_MBAR
	help
	  Motorola ColdFire 5407 processor support.

config M54xx
	bool

config M547x
	bool "MCF547x"
	select M54xx
	select MMU_COLDFIRE if MMU
	select HAVE_CACHE_CB
	select HAVE_MBAR
	help
	  Freescale ColdFire 5470/5471/5472/5473/5474/5475 processor support.

config M548x
	bool "MCF548x"
	select MMU_COLDFIRE if MMU
	select M54xx
	select HAVE_CACHE_CB
	select HAVE_MBAR
	help
	  Freescale ColdFire 5480/5481/5482/5483/5484/5485 processor support.

config M5441x
	bool "MCF5441x"
	depends on !MMU
	select GENERIC_CLOCKEVENTS
	select HAVE_CACHE_CB
	help
	  Freescale Coldfire 54410/54415/54416/54417/54418 processor support.

endif # COLDFIRE


comment "Processor Specific Options"

config M68KFPU_EMU
	bool "Math emulation support"
	depends on MMU
	help
	  At some point in the future, this will cause floating-point math
	  instructions to be emulated by the kernel on machines that lack a
	  floating-point math coprocessor.  Thrill-seekers and chronically
	  sleep-deprived psychotic hacker types can say Y now, everyone else
	  should probably wait a while.

config M68KFPU_EMU_EXTRAPREC
	bool "Math emulation extra precision"
	depends on M68KFPU_EMU
	help
	  The fpu uses normally a few bit more during calculations for
	  correct rounding, the emulator can (often) do the same but this
	  extra calculation can cost quite some time, so you can disable
	  it here. The emulator will then "only" calculate with a 64 bit
	  mantissa and round slightly incorrect, what is more than enough
	  for normal usage.

config M68KFPU_EMU_ONLY
	bool "Math emulation only kernel"
	depends on M68KFPU_EMU
	help
	  This option prevents any floating-point instructions from being
	  compiled into the kernel, thereby the kernel doesn't save any
	  floating point context anymore during task switches, so this
	  kernel will only be usable on machines without a floating-point
	  math coprocessor. This makes the kernel a bit faster as no tests
	  needs to be executed whether a floating-point instruction in the
	  kernel should be executed or not.

config ADVANCED
	bool "Advanced configuration options"
	depends on MMU
	---help---
	  This gives you access to some advanced options for the CPU. The
	  defaults should be fine for most users, but these options may make
	  it possible for you to improve performance somewhat if you know what
	  you are doing.

	  Note that the answer to this question won't directly affect the
	  kernel: saying N will just cause the configurator to skip all
	  the questions about these options.

	  Most users should say N to this question.

config RMW_INSNS
	bool "Use read-modify-write instructions"
	depends on ADVANCED
	---help---
	  This allows to use certain instructions that work with indivisible
	  read-modify-write bus cycles. While this is faster than the
	  workaround of disabling interrupts, it can conflict with DMA
	  ( = direct memory access) on many Amiga systems, and it is also said
	  to destabilize other machines. It is very likely that this will
	  cause serious problems on any Amiga or Atari Medusa if set. The only
	  configuration where it should work are 68030-based Ataris, where it
	  apparently improves performance. But you've been warned! Unless you
	  really know what you are doing, say N. Try Y only if you're quite
	  adventurous.

config SINGLE_MEMORY_CHUNK
	bool "Use one physical chunk of memory only" if ADVANCED && !SUN3
	depends on MMU
	default y if SUN3
	select NEED_MULTIPLE_NODES
	help
	  Ignore all but the first contiguous chunk of physical memory for VM
	  purposes.  This will save a few bytes kernel size and may speed up
	  some operations.  Say N if not sure.

config ARCH_DISCONTIGMEM_ENABLE
	def_bool MMU && !SINGLE_MEMORY_CHUNK

config 060_WRITETHROUGH
	bool "Use write-through caching for 68060 supervisor accesses"
	depends on ADVANCED && M68060
	---help---
	  The 68060 generally uses copyback caching of recently accessed data.
	  Copyback caching means that memory writes will be held in an on-chip
	  cache and only written back to memory some time later.  Saying Y
	  here will force supervisor (kernel) accesses to use writethrough
	  caching.  Writethrough caching means that data is written to memory
	  straight away, so that cache and memory data always agree.
	  Writethrough caching is less efficient, but is needed for some
	  drivers on 68060 based systems where the 68060 bus snooping signal
	  is hardwired on.  The 53c710 SCSI driver is known to suffer from
	  this problem.

config M68K_L2_CACHE
	bool
	depends on MAC
	default y

config NODES_SHIFT
	int
	default "3"
	depends on !SINGLE_MEMORY_CHUNK

config CPU_HAS_NO_BITFIELDS
	bool

config CPU_HAS_NO_MULDIV64
	bool

config CPU_HAS_NO_UNALIGNED
	bool

config CPU_HAS_ADDRESS_SPACES
	bool

config FPU
	bool

config COLDFIRE_SW_A7
	bool

config HAVE_CACHE_SPLIT
	bool

config HAVE_CACHE_CB
	bool

config HAVE_MBAR
	bool

config HAVE_IPSBAR
	bool

config CLOCK_SET
	bool "Enable setting the CPU clock frequency"
	depends on COLDFIRE
	default n
	help
	  On some CPU's you do not need to know what the core CPU clock
	  frequency is. On these you can disable clock setting. On some
	  traditional 68K parts, and on all ColdFire parts you need to set
	  the appropriate CPU clock frequency. On these devices many of the
	  onboard peripherals derive their timing from the master CPU clock
	  frequency.

config CLOCK_FREQ
	int "Set the core clock frequency"
	default "66666666"
	depends on CLOCK_SET
	help
	  Define the CPU clock frequency in use. This is the core clock
	  frequency, it may or may not be the same as the external clock
	  crystal fitted to your board. Some processors have an internal
	  PLL and can have their frequency programmed at run time, others
	  use internal dividers. In general the kernel won't setup a PLL
	  if it is fitted (there are some exceptions). This value will be
	  specific to the exact CPU that you are using.

config OLDMASK
	bool "Old mask 5307 (1H55J) silicon"
	depends on M5307
	help
	  Build support for the older revision ColdFire 5307 silicon.
	  Specifically this is the 1H55J mask revision.

if HAVE_CACHE_SPLIT
choice
	prompt "Split Cache Configuration"
	default CACHE_I

config CACHE_I
	bool "Instruction"
	help
	  Use all of the ColdFire CPU cache memory as an instruction cache.

config CACHE_D
	bool "Data"
	help
	  Use all of the ColdFire CPU cache memory as a data cache.

config CACHE_BOTH
	bool "Both"
	help
	  Split the ColdFire CPU cache, and use half as an instruction cache
	  and half as a data cache.
endchoice
endif

if HAVE_CACHE_CB
choice
	prompt "Data cache mode"
	default CACHE_WRITETHRU

config CACHE_WRITETHRU
	bool "Write-through"
	help
	  The ColdFire CPU cache is set into Write-through mode.

config CACHE_COPYBACK
	bool "Copy-back"
	help
	  The ColdFire CPU cache is set into Copy-back mode.
endchoice
endif
Commit	Line	Data
0e152d80 GU	1	comment "Processor Type"
0e152d80 GU	2
ad8f955d GU	3	choice
	4	prompt "CPU family support"
	5	default M68KCLASSIC if MMU
	6	default COLDFIRE if !MMU
	7	help
	8	The Freescale (was Motorola) M68K family of processors implements
	9	the full 68000 processor instruction set.
6b2aac42	10	The Freescale ColdFire family of processors is a modern derivative
ad8f955d GU	11	of the 68000 processor family. They are mainly targeted at embedded
	12	applications, and are all System-On-Chip (SOC) devices, as opposed
	13	to stand alone CPUs. They implement a subset of the original 68000
	14	processor instruction set.
	15	If you anticipate running this kernel on a computer with a classic
	16	MC68xxx processor, select M68KCLASSIC.
	17	If you anticipate running this kernel on a computer with a ColdFire
	18	processor, select COLDFIRE.
	19
	20	config M68KCLASSIC
	21	bool "Classic M68K CPU family support"
	22
	23	config COLDFIRE
	24	bool "Coldfire CPU family support"
	25	select GENERIC_GPIO
eac57949	26	select ARCH_WANT_OPTIONAL_GPIOLIB
7563bbf8	27	select ARCH_HAVE_CUSTOM_GPIO_H
ad8f955d GU	28	select CPU_HAS_NO_BITFIELDS
	29	select CPU_HAS_NO_MULDIV64
	30	select GENERIC_CSUM
e7d6582e	31	select HAVE_CLK
ad8f955d GU	32
	33	endchoice
	34
	35	if M68KCLASSIC
	36
0e152d80	37	config M68000
4674e8d3	38	bool "MC68000"
9da1a84a	39	depends on !MMU
0e152d80	40	select CPU_HAS_NO_BITFIELDS
84f3fb7a	41	select CPU_HAS_NO_MULDIV64
9f1f1180	42	select CPU_HAS_NO_UNALIGNED
7f73bafc	43	select GENERIC_CSUM
0e152d80 GU	44	help
	45	The Freescale (was Motorola) 68000 CPU is the first generation of
	46	the well known M68K family of processors. The CPU core as well as
	47	being available as a stand alone CPU was also used in many
	48	System-On-Chip devices (eg 68328, 68302, etc). It does not contain
	49	a paging MMU.
	50
	51	config MCPU32
	52	bool
	53	select CPU_HAS_NO_BITFIELDS
7df0d27f	54	select CPU_HAS_NO_UNALIGNED
0e152d80 GU	55	help
	56	The Freescale (was then Motorola) CPU32 is a CPU core that is
	57	based on the 68020 processor. For the most part it is used in
	58	System-On-Chip parts, and does not contain a paging MMU.
	59
0e152d80 GU	60	config M68020
	61	bool "68020 support"
	62	depends on MMU
e08d703c	63	select CPU_HAS_ADDRESS_SPACES
0e152d80 GU	64	help
	65	If you anticipate running this kernel on a computer with a MC68020
	66	processor, say Y. Otherwise, say N. Note that the 68020 requires a
	67	68851 MMU (Memory Management Unit) to run Linux/m68k, except on the
	68	Sun 3, which provides its own version.
	69
	70	config M68030
	71	bool "68030 support"
	72	depends on MMU && !MMU_SUN3
e08d703c	73	select CPU_HAS_ADDRESS_SPACES
0e152d80 GU	74	help
	75	If you anticipate running this kernel on a computer with a MC68030
	76	processor, say Y. Otherwise, say N. Note that a MC68EC030 will not
	77	work, as it does not include an MMU (Memory Management Unit).
	78
	79	config M68040
	80	bool "68040 support"
	81	depends on MMU && !MMU_SUN3
e08d703c	82	select CPU_HAS_ADDRESS_SPACES
0e152d80 GU	83	help
	84	If you anticipate running this kernel on a computer with a MC68LC040
	85	or MC68040 processor, say Y. Otherwise, say N. Note that an
	86	MC68EC040 will not work, as it does not include an MMU (Memory
	87	Management Unit).
	88
	89	config M68060
	90	bool "68060 support"
	91	depends on MMU && !MMU_SUN3
e08d703c	92	select CPU_HAS_ADDRESS_SPACES
0e152d80 GU	93	help
	94	If you anticipate running this kernel on a computer with a MC68060
	95	processor, say Y. Otherwise, say N.
	96
	97	config M68328
	98	bool "MC68328"
	99	depends on !MMU
	100	select M68000
	101	help
	102	Motorola 68328 processor support.
	103
	104	config M68EZ328
	105	bool "MC68EZ328"
	106	depends on !MMU
	107	select M68000
	108	help
	109	Motorola 68EX328 processor support.
	110
	111	config M68VZ328
	112	bool "MC68VZ328"
	113	depends on !MMU
	114	select M68000
	115	help
	116	Motorola 68VZ328 processor support.
	117
	118	config M68360
	119	bool "MC68360"
	120	depends on !MMU
	121	select MCPU32
	122	help
	123	Motorola 68360 processor support.
	124
ad8f955d GU	125	endif # M68KCLASSIC
	126
	127	if COLDFIRE
	128
0e152d80 GU	129	config M5206
	130	bool "MCF5206"
	131	depends on !MMU
0e152d80 GU	132	select COLDFIRE_SW_A7
	133	select HAVE_MBAR
	134	help
	135	Motorola ColdFire 5206 processor support.
	136
	137	config M5206e
	138	bool "MCF5206e"
	139	depends on !MMU
0e152d80 GU	140	select COLDFIRE_SW_A7
	141	select HAVE_MBAR
	142	help
	143	Motorola ColdFire 5206e processor support.
	144
	145	config M520x
	146	bool "MCF520x"
	147	depends on !MMU
0e152d80 GU	148	select GENERIC_CLOCKEVENTS
	149	select HAVE_CACHE_SPLIT
	150	help
	151	Freescale Coldfire 5207/5208 processor support.
	152
	153	config M523x
	154	bool "MCF523x"
	155	depends on !MMU
0e152d80 GU	156	select GENERIC_CLOCKEVENTS
	157	select HAVE_CACHE_SPLIT
	158	select HAVE_IPSBAR
	159	help
	160	Freescale Coldfire 5230/1/2/4/5 processor support
	161
	162	config M5249
	163	bool "MCF5249"
	164	depends on !MMU
0e152d80 GU	165	select COLDFIRE_SW_A7
	166	select HAVE_MBAR
	167	help
	168	Motorola ColdFire 5249 processor support.
	169
04e037aa SK	170	config M525x
	171	bool "MCF525x"
	172	depends on !MMU
	173	select COLDFIRE_SW_A7
	174	select HAVE_MBAR
	175	help
	176	Freescale (Motorola) Coldfire 5251/5253 processor support.
	177
0e152d80 GU	178	config M527x
	179	bool
	180
	181	config M5271
	182	bool "MCF5271"
	183	depends on !MMU
0e152d80 GU	184	select M527x
	185	select HAVE_CACHE_SPLIT
	186	select HAVE_IPSBAR
	187	select GENERIC_CLOCKEVENTS
	188	help
	189	Freescale (Motorola) ColdFire 5270/5271 processor support.
	190
	191	config M5272
	192	bool "MCF5272"
	193	depends on !MMU
0e152d80 GU	194	select COLDFIRE_SW_A7
	195	select HAVE_MBAR
	196	help
	197	Motorola ColdFire 5272 processor support.
	198
	199	config M5275
	200	bool "MCF5275"
	201	depends on !MMU
0e152d80 GU	202	select M527x
	203	select HAVE_CACHE_SPLIT
	204	select HAVE_IPSBAR
	205	select GENERIC_CLOCKEVENTS
	206	help
	207	Freescale (Motorola) ColdFire 5274/5275 processor support.
	208
	209	config M528x
	210	bool "MCF528x"
	211	depends on !MMU
0e152d80 GU	212	select GENERIC_CLOCKEVENTS
	213	select HAVE_CACHE_SPLIT
	214	select HAVE_IPSBAR
	215	help
	216	Motorola ColdFire 5280/5282 processor support.
	217
	218	config M5307
	219	bool "MCF5307"
	220	depends on !MMU
0e152d80 GU	221	select COLDFIRE_SW_A7
	222	select HAVE_CACHE_CB
	223	select HAVE_MBAR
	224	help
	225	Motorola ColdFire 5307 processor support.
	226
	227	config M532x
	228	bool "MCF532x"
	229	depends on !MMU
0e152d80 GU	230	select HAVE_CACHE_CB
	231	help
	232	Freescale (Motorola) ColdFire 532x processor support.
	233
	234	config M5407
	235	bool "MCF5407"
	236	depends on !MMU
0e152d80 GU	237	select COLDFIRE_SW_A7
	238	select HAVE_CACHE_CB
	239	select HAVE_MBAR
	240	help
	241	Motorola ColdFire 5407 processor support.
	242
	243	config M54xx
	244	bool
	245
	246	config M547x
	247	bool "MCF547x"
0e152d80	248	select M54xx
1f7034b9	249	select MMU_COLDFIRE if MMU
0e152d80 GU	250	select HAVE_CACHE_CB
	251	select HAVE_MBAR
	252	help
	253	Freescale ColdFire 5470/5471/5472/5473/5474/5475 processor support.
	254
	255	config M548x
	256	bool "MCF548x"
1f7034b9	257	select MMU_COLDFIRE if MMU
0e152d80 GU	258	select M54xx
	259	select HAVE_CACHE_CB
	260	select HAVE_MBAR
	261	help
	262	Freescale ColdFire 5480/5481/5482/5483/5484/5485 processor support.
	263
bea8bcb1 SK	264	config M5441x
	265	bool "MCF5441x"
	266	depends on !MMU
	267	select GENERIC_CLOCKEVENTS
	268	select HAVE_CACHE_CB
	269	help
	270	Freescale Coldfire 54410/54415/54416/54417/54418 processor support.
	271
ad8f955d GU	272	endif # COLDFIRE
ad8f955d GU	273
0e152d80 GU	274
	275	comment "Processor Specific Options"
	276
	277	config M68KFPU_EMU
112f8b12	278	bool "Math emulation support"
0e152d80	279	depends on MMU
0e152d80 GU	280	help
	281	At some point in the future, this will cause floating-point math
	282	instructions to be emulated by the kernel on machines that lack a
	283	floating-point math coprocessor. Thrill-seekers and chronically
	284	sleep-deprived psychotic hacker types can say Y now, everyone else
	285	should probably wait a while.
	286
	287	config M68KFPU_EMU_EXTRAPREC
	288	bool "Math emulation extra precision"
	289	depends on M68KFPU_EMU
	290	help
	291	The fpu uses normally a few bit more during calculations for
	292	correct rounding, the emulator can (often) do the same but this
	293	extra calculation can cost quite some time, so you can disable
	294	it here. The emulator will then "only" calculate with a 64 bit
	295	mantissa and round slightly incorrect, what is more than enough
	296	for normal usage.
	297
	298	config M68KFPU_EMU_ONLY
	299	bool "Math emulation only kernel"
	300	depends on M68KFPU_EMU
	301	help
	302	This option prevents any floating-point instructions from being
	303	compiled into the kernel, thereby the kernel doesn't save any
	304	floating point context anymore during task switches, so this
	305	kernel will only be usable on machines without a floating-point
	306	math coprocessor. This makes the kernel a bit faster as no tests
	307	needs to be executed whether a floating-point instruction in the
	308	kernel should be executed or not.
	309
	310	config ADVANCED
	311	bool "Advanced configuration options"
	312	depends on MMU
	313	---help---
	314	This gives you access to some advanced options for the CPU. The
	315	defaults should be fine for most users, but these options may make
	316	it possible for you to improve performance somewhat if you know what
	317	you are doing.
	318
	319	Note that the answer to this question won't directly affect the
	320	kernel: saying N will just cause the configurator to skip all
	321	the questions about these options.
	322
	323	Most users should say N to this question.
	324
	325	config RMW_INSNS
	326	bool "Use read-modify-write instructions"
	327	depends on ADVANCED
	328	---help---
	329	This allows to use certain instructions that work with indivisible
	330	read-modify-write bus cycles. While this is faster than the
	331	workaround of disabling interrupts, it can conflict with DMA
	332	( = direct memory access) on many Amiga systems, and it is also said
	333	to destabilize other machines. It is very likely that this will
	334	cause serious problems on any Amiga or Atari Medusa if set. The only
	335	configuration where it should work are 68030-based Ataris, where it
	336	apparently improves performance. But you've been warned! Unless you
	337	really know what you are doing, say N. Try Y only if you're quite
	338	adventurous.
	339
	340	config SINGLE_MEMORY_CHUNK
	341	bool "Use one physical chunk of memory only" if ADVANCED && !SUN3
	342	depends on MMU
	343	default y if SUN3
344	select NEED_MULTIPLE_NODES
345	help
346	Ignore all but the first contiguous chunk of physical memory for VM
347	purposes. This will save a few bytes kernel size and may speed up
348	some operations. Say N if not sure.
349
350	config ARCH_DISCONTIGMEM_ENABLE
351	def_bool MMU && !SINGLE_MEMORY_CHUNK
352
353	config 060_WRITETHROUGH
354	bool "Use write-through caching for 68060 supervisor accesses"
355	depends on ADVANCED && M68060
356	---help---
357	The 68060 generally uses copyback caching of recently accessed data.
358	Copyback caching means that memory writes will be held in an on-chip
359	cache and only written back to memory some time later. Saying Y
360	here will force supervisor (kernel) accesses to use writethrough
361	caching. Writethrough caching means that data is written to memory
362	straight away, so that cache and memory data always agree.
363	Writethrough caching is less efficient, but is needed for some
364	drivers on 68060 based systems where the 68060 bus snooping signal
365	is hardwired on. The 53c710 SCSI driver is known to suffer from
366	this problem.
367
368	config M68K_L2_CACHE
369	bool
370	depends on MAC
371	default y
372
373	config NODES_SHIFT
374	int
375	default "3"
376	depends on !SINGLE_MEMORY_CHUNK
377
022613e0 GU	378	config CPU_HAS_NO_BITFIELDS
	379	bool
	380
	381	config CPU_HAS_NO_MULDIV64
	382	bool
	383
9f1f1180 GU	384	config CPU_HAS_NO_UNALIGNED
	385	bool
	386
022613e0 GU	387	config CPU_HAS_ADDRESS_SPACES
	388	bool
	389
0e152d80 GU	390	config FPU
	391	bool
	392
	393	config COLDFIRE_SW_A7
	394	bool
	395
	396	config HAVE_CACHE_SPLIT
	397	bool
	398
	399	config HAVE_CACHE_CB
	400	bool
	401
	402	config HAVE_MBAR
	403	bool
	404
	405	config HAVE_IPSBAR
	406	bool
	407
	408	config CLOCK_SET
	409	bool "Enable setting the CPU clock frequency"
	410	depends on COLDFIRE
	411	default n
	412	help
	413	On some CPU's you do not need to know what the core CPU clock
	414	frequency is. On these you can disable clock setting. On some
	415	traditional 68K parts, and on all ColdFire parts you need to set
	416	the appropriate CPU clock frequency. On these devices many of the
	417	onboard peripherals derive their timing from the master CPU clock
	418	frequency.
	419
	420	config CLOCK_FREQ
	421	int "Set the core clock frequency"
	422	default "66666666"
	423	depends on CLOCK_SET
	424	help
	425	Define the CPU clock frequency in use. This is the core clock
	426	frequency, it may or may not be the same as the external clock
	427	crystal fitted to your board. Some processors have an internal
	428	PLL and can have their frequency programmed at run time, others
	429	use internal dividers. In general the kernel won't setup a PLL
	430	if it is fitted (there are some exceptions). This value will be
	431	specific to the exact CPU that you are using.
	432
	433	config OLDMASK
	434	bool "Old mask 5307 (1H55J) silicon"
	435	depends on M5307
	436	help
	437	Build support for the older revision ColdFire 5307 silicon.
	438	Specifically this is the 1H55J mask revision.
	439
	440	if HAVE_CACHE_SPLIT
	441	choice
	442	prompt "Split Cache Configuration"
	443	default CACHE_I
	444
	445	config CACHE_I
	446	bool "Instruction"
	447	help
	448	Use all of the ColdFire CPU cache memory as an instruction cache.
	449
	450	config CACHE_D
	451	bool "Data"
	452	help
	453	Use all of the ColdFire CPU cache memory as a data cache.
454
455	config CACHE_BOTH
456	bool "Both"
457	help
458	Split the ColdFire CPU cache, and use half as an instruction cache
459	and half as a data cache.
460	endchoice
461	endif
462
463	if HAVE_CACHE_CB
464	choice
465	prompt "Data cache mode"
466	default CACHE_WRITETHRU
467
468	config CACHE_WRITETHRU
469	bool "Write-through"
470	help
471	The ColdFire CPU cache is set into Write-through mode.
472
473	config CACHE_COPYBACK
474	bool "Copy-back"
475	help
476	The ColdFire CPU cache is set into Copy-back mode.
477	endchoice
478	endif
479