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Greg Ungerer0e152d82011-06-20 15:49:09 +10001comment "Processor Type"
2
Geert Uytterhoevenad8f9552011-12-26 20:32:02 +01003choice
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.
Masanari Iida6b2aac42012-04-14 00:14:11 +090010 The Freescale ColdFire family of processors is a modern derivative
Geert Uytterhoevenad8f9552011-12-26 20:32:02 +010011 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 GENERIC_GPIO
Steven Kingeac57942012-05-21 13:10:19 -070026 select ARCH_WANT_OPTIONAL_GPIOLIB
Mark Brown7563bbf2012-04-15 10:52:54 +010027 select ARCH_HAVE_CUSTOM_GPIO_H
Geert Uytterhoevenad8f9552011-12-26 20:32:02 +010028 select CPU_HAS_NO_BITFIELDS
29 select CPU_HAS_NO_MULDIV64
30 select GENERIC_CSUM
Greg Ungerere7d65822012-08-03 16:08:36 +100031 select HAVE_CLK
Geert Uytterhoevenad8f9552011-12-26 20:32:02 +010032
33endchoice
34
35if M68KCLASSIC
36
Greg Ungerer0e152d82011-06-20 15:49:09 +100037config M68000
Luis Alves4674e8d2012-10-24 00:45:23 +010038 bool "MC68000"
Luis Alves9da1a842012-10-25 21:01:16 +010039 depends on !MMU
Greg Ungerer0e152d82011-06-20 15:49:09 +100040 select CPU_HAS_NO_BITFIELDS
Greg Ungerer84f3fb72011-11-11 15:13:08 +100041 select CPU_HAS_NO_MULDIV64
Geert Uytterhoeven9f1f1182012-06-06 19:37:52 +020042 select CPU_HAS_NO_UNALIGNED
Greg Ungerer7f73baf2011-10-18 15:49:19 +100043 select GENERIC_CSUM
Greg Ungerer0e152d82011-06-20 15:49:09 +100044 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
51config MCPU32
52 bool
53 select CPU_HAS_NO_BITFIELDS
Geert Uytterhoeven7df0d272012-06-06 19:39:39 +020054 select CPU_HAS_NO_UNALIGNED
Greg Ungerer0e152d82011-06-20 15:49:09 +100055 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
Greg Ungerer0e152d82011-06-20 15:49:09 +100060config M68020
61 bool "68020 support"
62 depends on MMU
Greg Ungerere08d7032011-10-14 14:43:30 +100063 select CPU_HAS_ADDRESS_SPACES
Greg Ungerer0e152d82011-06-20 15:49:09 +100064 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
70config M68030
71 bool "68030 support"
72 depends on MMU && !MMU_SUN3
Greg Ungerere08d7032011-10-14 14:43:30 +100073 select CPU_HAS_ADDRESS_SPACES
Greg Ungerer0e152d82011-06-20 15:49:09 +100074 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
79config M68040
80 bool "68040 support"
81 depends on MMU && !MMU_SUN3
Greg Ungerere08d7032011-10-14 14:43:30 +100082 select CPU_HAS_ADDRESS_SPACES
Greg Ungerer0e152d82011-06-20 15:49:09 +100083 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
89config M68060
90 bool "68060 support"
91 depends on MMU && !MMU_SUN3
Greg Ungerere08d7032011-10-14 14:43:30 +100092 select CPU_HAS_ADDRESS_SPACES
Greg Ungerer0e152d82011-06-20 15:49:09 +100093 help
94 If you anticipate running this kernel on a computer with a MC68060
95 processor, say Y. Otherwise, say N.
96
97config M68328
98 bool "MC68328"
99 depends on !MMU
100 select M68000
101 help
102 Motorola 68328 processor support.
103
104config M68EZ328
105 bool "MC68EZ328"
106 depends on !MMU
107 select M68000
108 help
109 Motorola 68EX328 processor support.
110
111config M68VZ328
112 bool "MC68VZ328"
113 depends on !MMU
114 select M68000
115 help
116 Motorola 68VZ328 processor support.
117
118config M68360
119 bool "MC68360"
120 depends on !MMU
121 select MCPU32
122 help
123 Motorola 68360 processor support.
124
Geert Uytterhoevenad8f9552011-12-26 20:32:02 +0100125endif # M68KCLASSIC
126
127if COLDFIRE
128
Greg Ungerer0e152d82011-06-20 15:49:09 +1000129config M5206
130 bool "MCF5206"
131 depends on !MMU
Greg Ungerer0e152d82011-06-20 15:49:09 +1000132 select COLDFIRE_SW_A7
133 select HAVE_MBAR
134 help
135 Motorola ColdFire 5206 processor support.
136
137config M5206e
138 bool "MCF5206e"
139 depends on !MMU
Greg Ungerer0e152d82011-06-20 15:49:09 +1000140 select COLDFIRE_SW_A7
141 select HAVE_MBAR
142 help
143 Motorola ColdFire 5206e processor support.
144
145config M520x
146 bool "MCF520x"
147 depends on !MMU
Greg Ungerer0e152d82011-06-20 15:49:09 +1000148 select GENERIC_CLOCKEVENTS
149 select HAVE_CACHE_SPLIT
150 help
151 Freescale Coldfire 5207/5208 processor support.
152
153config M523x
154 bool "MCF523x"
155 depends on !MMU
Greg Ungerer0e152d82011-06-20 15:49:09 +1000156 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
162config M5249
163 bool "MCF5249"
164 depends on !MMU
Greg Ungerer0e152d82011-06-20 15:49:09 +1000165 select COLDFIRE_SW_A7
166 select HAVE_MBAR
167 help
168 Motorola ColdFire 5249 processor support.
169
Steven King04e037a2012-06-05 08:23:08 -0700170config 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
Greg Ungerer0e152d82011-06-20 15:49:09 +1000178config M527x
179 bool
180
181config M5271
182 bool "MCF5271"
183 depends on !MMU
Greg Ungerer0e152d82011-06-20 15:49:09 +1000184 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
191config M5272
192 bool "MCF5272"
193 depends on !MMU
Greg Ungerer0e152d82011-06-20 15:49:09 +1000194 select COLDFIRE_SW_A7
195 select HAVE_MBAR
196 help
197 Motorola ColdFire 5272 processor support.
198
199config M5275
200 bool "MCF5275"
201 depends on !MMU
Greg Ungerer0e152d82011-06-20 15:49:09 +1000202 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
209config M528x
210 bool "MCF528x"
211 depends on !MMU
Greg Ungerer0e152d82011-06-20 15:49:09 +1000212 select GENERIC_CLOCKEVENTS
213 select HAVE_CACHE_SPLIT
214 select HAVE_IPSBAR
215 help
216 Motorola ColdFire 5280/5282 processor support.
217
218config M5307
219 bool "MCF5307"
220 depends on !MMU
Greg Ungerer0e152d82011-06-20 15:49:09 +1000221 select COLDFIRE_SW_A7
222 select HAVE_CACHE_CB
223 select HAVE_MBAR
224 help
225 Motorola ColdFire 5307 processor support.
226
227config M532x
228 bool "MCF532x"
229 depends on !MMU
Greg Ungerer0e152d82011-06-20 15:49:09 +1000230 select HAVE_CACHE_CB
231 help
232 Freescale (Motorola) ColdFire 532x processor support.
233
234config M5407
235 bool "MCF5407"
236 depends on !MMU
Greg Ungerer0e152d82011-06-20 15:49:09 +1000237 select COLDFIRE_SW_A7
238 select HAVE_CACHE_CB
239 select HAVE_MBAR
240 help
241 Motorola ColdFire 5407 processor support.
242
243config M54xx
244 bool
245
246config M547x
247 bool "MCF547x"
Greg Ungerer0e152d82011-06-20 15:49:09 +1000248 select M54xx
Greg Ungerer1f7034b2011-10-19 14:13:18 +1000249 select MMU_COLDFIRE if MMU
Greg Ungerer0e152d82011-06-20 15:49:09 +1000250 select HAVE_CACHE_CB
251 select HAVE_MBAR
252 help
253 Freescale ColdFire 5470/5471/5472/5473/5474/5475 processor support.
254
255config M548x
256 bool "MCF548x"
Greg Ungerer1f7034b2011-10-19 14:13:18 +1000257 select MMU_COLDFIRE if MMU
Greg Ungerer0e152d82011-06-20 15:49:09 +1000258 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
Steven Kingbea8bcb2012-06-06 14:28:31 -0700264config 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
Geert Uytterhoevenad8f9552011-12-26 20:32:02 +0100272endif # COLDFIRE
273
Greg Ungerer0e152d82011-06-20 15:49:09 +1000274
275comment "Processor Specific Options"
276
277config M68KFPU_EMU
Kees Cook112f8b12012-10-23 13:01:27 -0700278 bool "Math emulation support"
Greg Ungerer0e152d82011-06-20 15:49:09 +1000279 depends on MMU
Greg Ungerer0e152d82011-06-20 15:49:09 +1000280 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
287config 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
298config 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
310config 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
325config 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
340config 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
350config ARCH_DISCONTIGMEM_ENABLE
351 def_bool MMU && !SINGLE_MEMORY_CHUNK
352
353config 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
368config M68K_L2_CACHE
369 bool
370 depends on MAC
371 default y
372
373config NODES_SHIFT
374 int
375 default "3"
376 depends on !SINGLE_MEMORY_CHUNK
377
Geert Uytterhoeven022613e2012-06-06 17:26:35 +0200378config CPU_HAS_NO_BITFIELDS
379 bool
380
381config CPU_HAS_NO_MULDIV64
382 bool
383
Geert Uytterhoeven9f1f1182012-06-06 19:37:52 +0200384config CPU_HAS_NO_UNALIGNED
385 bool
386
Geert Uytterhoeven022613e2012-06-06 17:26:35 +0200387config CPU_HAS_ADDRESS_SPACES
388 bool
389
Greg Ungerer0e152d82011-06-20 15:49:09 +1000390config FPU
391 bool
392
393config COLDFIRE_SW_A7
394 bool
395
396config HAVE_CACHE_SPLIT
397 bool
398
399config HAVE_CACHE_CB
400 bool
401
402config HAVE_MBAR
403 bool
404
405config HAVE_IPSBAR
406 bool
407
408config 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
420config 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
433config 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
440if HAVE_CACHE_SPLIT
441choice
442 prompt "Split Cache Configuration"
443 default CACHE_I
444
445config CACHE_I
446 bool "Instruction"
447 help
448 Use all of the ColdFire CPU cache memory as an instruction cache.
449
450config CACHE_D
451 bool "Data"
452 help
453 Use all of the ColdFire CPU cache memory as a data cache.
454
455config 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.
460endchoice
461endif
462
463if HAVE_CACHE_CB
464choice
465 prompt "Data cache mode"
466 default CACHE_WRITETHRU
467
468config CACHE_WRITETHRU
469 bool "Write-through"
470 help
471 The ColdFire CPU cache is set into Write-through mode.
472
473config CACHE_COPYBACK
474 bool "Copy-back"
475 help
476 The ColdFire CPU cache is set into Copy-back mode.
477endchoice
478endif
479