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1comment "Processor Type"
2
3choice
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.
10	  The Freescale ColdFire family of processors is a modern derivative
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
20config M68KCLASSIC
21	bool "Classic M68K CPU family support"
22
23config COLDFIRE
24	bool "Coldfire CPU family support"
25	select ARCH_REQUIRE_GPIOLIB
26	select ARCH_HAVE_CUSTOM_GPIO_H
27	select CPU_HAS_NO_BITFIELDS
28	select CPU_HAS_NO_MULDIV64
29	select GENERIC_CSUM
30	select HAVE_CLK
31
32endchoice
33
34if M68KCLASSIC
35
36config M68000
37	bool "MC68000"
38	depends on !MMU
39	select CPU_HAS_NO_BITFIELDS
40	select CPU_HAS_NO_MULDIV64
41	select CPU_HAS_NO_UNALIGNED
42	select GENERIC_CSUM
43	help
44	  The Freescale (was Motorola) 68000 CPU is the first generation of
45	  the well known M68K family of processors. The CPU core as well as
46	  being available as a stand alone CPU was also used in many
47	  System-On-Chip devices (eg 68328, 68302, etc). It does not contain
48	  a paging MMU.
49
50config MCPU32
51	bool
52	select CPU_HAS_NO_BITFIELDS
53	select CPU_HAS_NO_UNALIGNED
54	help
55	  The Freescale (was then Motorola) CPU32 is a CPU core that is
56	  based on the 68020 processor. For the most part it is used in
57	  System-On-Chip parts, and does not contain a paging MMU.
58
59config M68020
60	bool "68020 support"
61	depends on MMU
62	select CPU_HAS_ADDRESS_SPACES
63	help
64	  If you anticipate running this kernel on a computer with a MC68020
65	  processor, say Y. Otherwise, say N. Note that the 68020 requires a
66	  68851 MMU (Memory Management Unit) to run Linux/m68k, except on the
67	  Sun 3, which provides its own version.
68
69config M68030
70	bool "68030 support"
71	depends on MMU && !MMU_SUN3
72	select CPU_HAS_ADDRESS_SPACES
73	help
74	  If you anticipate running this kernel on a computer with a MC68030
75	  processor, say Y. Otherwise, say N. Note that a MC68EC030 will not
76	  work, as it does not include an MMU (Memory Management Unit).
77
78config M68040
79	bool "68040 support"
80	depends on MMU && !MMU_SUN3
81	select CPU_HAS_ADDRESS_SPACES
82	help
83	  If you anticipate running this kernel on a computer with a MC68LC040
84	  or MC68040 processor, say Y. Otherwise, say N. Note that an
85	  MC68EC040 will not work, as it does not include an MMU (Memory
86	  Management Unit).
87
88config M68060
89	bool "68060 support"
90	depends on MMU && !MMU_SUN3
91	select CPU_HAS_ADDRESS_SPACES
92	help
93	  If you anticipate running this kernel on a computer with a MC68060
94	  processor, say Y. Otherwise, say N.
95
96config M68328
97	bool "MC68328"
98	depends on !MMU
99	select M68000
100	help
101	  Motorola 68328 processor support.
102
103config M68EZ328
104	bool "MC68EZ328"
105	depends on !MMU
106	select M68000
107	help
108	  Motorola 68EX328 processor support.
109
110config M68VZ328
111	bool "MC68VZ328"
112	depends on !MMU
113	select M68000
114	help
115	  Motorola 68VZ328 processor support.
116
117config M68360
118	bool "MC68360"
119	depends on !MMU
120	select MCPU32
121	help
122	  Motorola 68360 processor support.
123
124endif # M68KCLASSIC
125
126if COLDFIRE
127
128choice
129	prompt "ColdFire SoC type"
130	default M520x
131	help
132	  Select the type of ColdFire System-on-Chip (SoC) that you want
133	  to build for.
134
135config M5206
136	bool "MCF5206"
137	depends on !MMU
138	select COLDFIRE_SW_A7
139	select HAVE_MBAR
140	help
141	  Motorola ColdFire 5206 processor support.
142
143config M5206e
144	bool "MCF5206e"
145	depends on !MMU
146	select COLDFIRE_SW_A7
147	select HAVE_MBAR
148	help
149	  Motorola ColdFire 5206e processor support.
150
151config M520x
152	bool "MCF520x"
153	depends on !MMU
154	select GENERIC_CLOCKEVENTS
155	select HAVE_CACHE_SPLIT
156	help
157	   Freescale Coldfire 5207/5208 processor support.
158
159config M523x
160	bool "MCF523x"
161	depends on !MMU
162	select GENERIC_CLOCKEVENTS
163	select HAVE_CACHE_SPLIT
164	select HAVE_IPSBAR
165	help
166	  Freescale Coldfire 5230/1/2/4/5 processor support
167
168config M5249
169	bool "MCF5249"
170	depends on !MMU
171	select COLDFIRE_SW_A7
172	select HAVE_MBAR
173	help
174	  Motorola ColdFire 5249 processor support.
175
176config M525x
177	bool "MCF525x"
178	depends on !MMU
179	select COLDFIRE_SW_A7
180	select HAVE_MBAR
181	help
182	  Freescale (Motorola) Coldfire 5251/5253 processor support.
183
184config M5271
185	bool "MCF5271"
186	depends on !MMU
187	select M527x
188	select HAVE_CACHE_SPLIT
189	select HAVE_IPSBAR
190	select GENERIC_CLOCKEVENTS
191	help
192	  Freescale (Motorola) ColdFire 5270/5271 processor support.
193
194config M5272
195	bool "MCF5272"
196	depends on !MMU
197	select COLDFIRE_SW_A7
198	select HAVE_MBAR
199	help
200	  Motorola ColdFire 5272 processor support.
201
202config M5275
203	bool "MCF5275"
204	depends on !MMU
205	select M527x
206	select HAVE_CACHE_SPLIT
207	select HAVE_IPSBAR
208	select GENERIC_CLOCKEVENTS
209	help
210	  Freescale (Motorola) ColdFire 5274/5275 processor support.
211
212config M528x
213	bool "MCF528x"
214	depends on !MMU
215	select GENERIC_CLOCKEVENTS
216	select HAVE_CACHE_SPLIT
217	select HAVE_IPSBAR
218	help
219	  Motorola ColdFire 5280/5282 processor support.
220
221config M5307
222	bool "MCF5307"
223	depends on !MMU
224	select COLDFIRE_SW_A7
225	select HAVE_CACHE_CB
226	select HAVE_MBAR
227	help
228	  Motorola ColdFire 5307 processor support.
229
230config M532x
231	bool "MCF532x"
232	depends on !MMU
233	select M53xx
234	select HAVE_CACHE_CB
235	help
236	  Freescale (Motorola) ColdFire 532x processor support.
237
238config M537x
239	bool "MCF537x"
240	depends on !MMU
241	select M53xx
242	select HAVE_CACHE_CB
243	help
244	  Freescale ColdFire 537x processor support.
245
246config M5407
247	bool "MCF5407"
248	depends on !MMU
249	select COLDFIRE_SW_A7
250	select HAVE_CACHE_CB
251	select HAVE_MBAR
252	help
253	  Motorola ColdFire 5407 processor support.
254
255config M547x
256	bool "MCF547x"
257	select M54xx
258	select MMU_COLDFIRE if MMU
259	select HAVE_CACHE_CB
260	select HAVE_MBAR
261	help
262	  Freescale ColdFire 5470/5471/5472/5473/5474/5475 processor support.
263
264config M548x
265	bool "MCF548x"
266	select MMU_COLDFIRE if MMU
267	select M54xx
268	select HAVE_CACHE_CB
269	select HAVE_MBAR
270	help
271	  Freescale ColdFire 5480/5481/5482/5483/5484/5485 processor support.
272
273config M5441x
274	bool "MCF5441x"
275	depends on !MMU
276	select GENERIC_CLOCKEVENTS
277	select HAVE_CACHE_CB
278	help
279	  Freescale Coldfire 54410/54415/54416/54417/54418 processor support.
280
281endchoice
282
283config M527x
284	bool
285
286config M53xx
287	bool
288
289config M54xx
290	bool
291
292endif # COLDFIRE
293
294
295comment "Processor Specific Options"
296
297config M68KFPU_EMU
298	bool "Math emulation support"
299	depends on MMU
300	help
301	  At some point in the future, this will cause floating-point math
302	  instructions to be emulated by the kernel on machines that lack a
303	  floating-point math coprocessor.  Thrill-seekers and chronically
304	  sleep-deprived psychotic hacker types can say Y now, everyone else
305	  should probably wait a while.
306
307config M68KFPU_EMU_EXTRAPREC
308	bool "Math emulation extra precision"
309	depends on M68KFPU_EMU
310	help
311	  The fpu uses normally a few bit more during calculations for
312	  correct rounding, the emulator can (often) do the same but this
313	  extra calculation can cost quite some time, so you can disable
314	  it here. The emulator will then "only" calculate with a 64 bit
315	  mantissa and round slightly incorrect, what is more than enough
316	  for normal usage.
317
318config M68KFPU_EMU_ONLY
319	bool "Math emulation only kernel"
320	depends on M68KFPU_EMU
321	help
322	  This option prevents any floating-point instructions from being
323	  compiled into the kernel, thereby the kernel doesn't save any
324	  floating point context anymore during task switches, so this
325	  kernel will only be usable on machines without a floating-point
326	  math coprocessor. This makes the kernel a bit faster as no tests
327	  needs to be executed whether a floating-point instruction in the
328	  kernel should be executed or not.
329
330config ADVANCED
331	bool "Advanced configuration options"
332	depends on MMU
333	---help---
334	  This gives you access to some advanced options for the CPU. The
335	  defaults should be fine for most users, but these options may make
336	  it possible for you to improve performance somewhat if you know what
337	  you are doing.
338
339	  Note that the answer to this question won't directly affect the
340	  kernel: saying N will just cause the configurator to skip all
341	  the questions about these options.
342
343	  Most users should say N to this question.
344
345config RMW_INSNS
346	bool "Use read-modify-write instructions"
347	depends on ADVANCED
348	---help---
349	  This allows to use certain instructions that work with indivisible
350	  read-modify-write bus cycles. While this is faster than the
351	  workaround of disabling interrupts, it can conflict with DMA
352	  ( = direct memory access) on many Amiga systems, and it is also said
353	  to destabilize other machines. It is very likely that this will
354	  cause serious problems on any Amiga or Atari Medusa if set. The only
355	  configuration where it should work are 68030-based Ataris, where it
356	  apparently improves performance. But you've been warned! Unless you
357	  really know what you are doing, say N. Try Y only if you're quite
358	  adventurous.
359
360config SINGLE_MEMORY_CHUNK
361	bool "Use one physical chunk of memory only" if ADVANCED && !SUN3
362	depends on MMU
363	default y if SUN3
364	select NEED_MULTIPLE_NODES
365	help
366	  Ignore all but the first contiguous chunk of physical memory for VM
367	  purposes.  This will save a few bytes kernel size and may speed up
368	  some operations.  Say N if not sure.
369
370config ARCH_DISCONTIGMEM_ENABLE
371	def_bool MMU && !SINGLE_MEMORY_CHUNK
372
373config 060_WRITETHROUGH
374	bool "Use write-through caching for 68060 supervisor accesses"
375	depends on ADVANCED && M68060
376	---help---
377	  The 68060 generally uses copyback caching of recently accessed data.
378	  Copyback caching means that memory writes will be held in an on-chip
379	  cache and only written back to memory some time later.  Saying Y
380	  here will force supervisor (kernel) accesses to use writethrough
381	  caching.  Writethrough caching means that data is written to memory
382	  straight away, so that cache and memory data always agree.
383	  Writethrough caching is less efficient, but is needed for some
384	  drivers on 68060 based systems where the 68060 bus snooping signal
385	  is hardwired on.  The 53c710 SCSI driver is known to suffer from
386	  this problem.
387
388config M68K_L2_CACHE
389	bool
390	depends on MAC
391	default y
392
393config NODES_SHIFT
394	int
395	default "3"
396	depends on !SINGLE_MEMORY_CHUNK
397
398config CPU_HAS_NO_BITFIELDS
399	bool
400
401config CPU_HAS_NO_MULDIV64
402	bool
403
404config CPU_HAS_NO_UNALIGNED
405	bool
406
407config CPU_HAS_ADDRESS_SPACES
408	bool
409
410config FPU
411	bool
412
413config COLDFIRE_SW_A7
414	bool
415
416config HAVE_CACHE_SPLIT
417	bool
418
419config HAVE_CACHE_CB
420	bool
421
422config HAVE_MBAR
423	bool
424
425config HAVE_IPSBAR
426	bool
427
428config CLOCK_FREQ
429	int "Set the core clock frequency"
430	default "25000000" if M5206
431	default "54000000" if M5206e
432	default "166666666" if M520x
433	default "140000000" if M5249
434	default "150000000" if M527x || M523x
435	default "90000000" if M5307
436	default "50000000" if M5407
437	default "266000000" if M54xx
438	default "66666666"
439	depends on COLDFIRE
440	help
441	  Define the CPU clock frequency in use. This is the core clock
442	  frequency, it may or may not be the same as the external clock
443	  crystal fitted to your board. Some processors have an internal
444	  PLL and can have their frequency programmed at run time, others
445	  use internal dividers. In general the kernel won't setup a PLL
446	  if it is fitted (there are some exceptions). This value will be
447	  specific to the exact CPU that you are using.
448
449config OLDMASK
450	bool "Old mask 5307 (1H55J) silicon"
451	depends on M5307
452	help
453	  Build support for the older revision ColdFire 5307 silicon.
454	  Specifically this is the 1H55J mask revision.
455
456if HAVE_CACHE_SPLIT
457choice
458	prompt "Split Cache Configuration"
459	default CACHE_I
460
461config CACHE_I
462	bool "Instruction"
463	help
464	  Use all of the ColdFire CPU cache memory as an instruction cache.
465
466config CACHE_D
467	bool "Data"
468	help
469	  Use all of the ColdFire CPU cache memory as a data cache.
470
471config CACHE_BOTH
472	bool "Both"
473	help
474	  Split the ColdFire CPU cache, and use half as an instruction cache
475	  and half as a data cache.
476endchoice
477endif
478
479if HAVE_CACHE_CB
480choice
481	prompt "Data cache mode"
482	default CACHE_WRITETHRU
483
484config CACHE_WRITETHRU
485	bool "Write-through"
486	help
487	  The ColdFire CPU cache is set into Write-through mode.
488
489config CACHE_COPYBACK
490	bool "Copy-back"
491	help
492	  The ColdFire CPU cache is set into Copy-back mode.
493endchoice
494endif
495
496