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gerrit-public.fairphone.software / kernel / msm-4.19 / fa8ce723936460fcf7e49f508fd5dbd5125e39c4 / . / arch / m68k / Kconfig.cpu
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Greg Ungerer0e152d82011-06-20 15:49:09 +1000[diff] [blame]1comment "Processor Type"
2
3config M68000
4 bool
5 select CPU_HAS_NO_BITFIELDS
6 help
7 The Freescale (was Motorola) 68000 CPU is the first generation of
8 the well known M68K family of processors. The CPU core as well as
9 being available as a stand alone CPU was also used in many
10 System-On-Chip devices (eg 68328, 68302, etc). It does not contain
11 a paging MMU.
12
13config MCPU32
14 bool
15 select CPU_HAS_NO_BITFIELDS
16 help
17 The Freescale (was then Motorola) CPU32 is a CPU core that is
18 based on the 68020 processor. For the most part it is used in
19 System-On-Chip parts, and does not contain a paging MMU.
20
21config COLDFIRE
22 bool
23 select GENERIC_GPIO
24 select ARCH_REQUIRE_GPIOLIB
25 select CPU_HAS_NO_BITFIELDS
26 help
27 The Freescale ColdFire family of processors is a modern derivitive
28 of the 68000 processor family. They are mainly targeted at embedded
29 applications, and are all System-On-Chip (SOC) devices, as opposed
30 to stand alone CPUs. They implement a subset of the original 68000
31 processor instruction set.
32
33config M68020
34 bool "68020 support"
35 depends on MMU
36 help
37 If you anticipate running this kernel on a computer with a MC68020
38 processor, say Y. Otherwise, say N. Note that the 68020 requires a
39 68851 MMU (Memory Management Unit) to run Linux/m68k, except on the
40 Sun 3, which provides its own version.
41
42config M68030
43 bool "68030 support"
44 depends on MMU && !MMU_SUN3
45 help
46 If you anticipate running this kernel on a computer with a MC68030
47 processor, say Y. Otherwise, say N. Note that a MC68EC030 will not
48 work, as it does not include an MMU (Memory Management Unit).
49
50config M68040
51 bool "68040 support"
52 depends on MMU && !MMU_SUN3
53 help
54 If you anticipate running this kernel on a computer with a MC68LC040
55 or MC68040 processor, say Y. Otherwise, say N. Note that an
56 MC68EC040 will not work, as it does not include an MMU (Memory
57 Management Unit).
58
59config M68060
60 bool "68060 support"
61 depends on MMU && !MMU_SUN3
62 help
63 If you anticipate running this kernel on a computer with a MC68060
64 processor, say Y. Otherwise, say N.
65
66config M68328
67 bool "MC68328"
68 depends on !MMU
69 select M68000
70 help
71 Motorola 68328 processor support.
72
73config M68EZ328
74 bool "MC68EZ328"
75 depends on !MMU
76 select M68000
77 help
78 Motorola 68EX328 processor support.
79
80config M68VZ328
81 bool "MC68VZ328"
82 depends on !MMU
83 select M68000
84 help
85 Motorola 68VZ328 processor support.
86
87config M68360
88 bool "MC68360"
89 depends on !MMU
90 select MCPU32
91 help
92 Motorola 68360 processor support.
93
94config M5206
95 bool "MCF5206"
96 depends on !MMU
97 select COLDFIRE
98 select COLDFIRE_SW_A7
99 select HAVE_MBAR
100 help
101 Motorola ColdFire 5206 processor support.
102
103config M5206e
104 bool "MCF5206e"
105 depends on !MMU
106 select COLDFIRE
107 select COLDFIRE_SW_A7
108 select HAVE_MBAR
109 help
110 Motorola ColdFire 5206e processor support.
111
112config M520x
113 bool "MCF520x"
114 depends on !MMU
115 select COLDFIRE
116 select GENERIC_CLOCKEVENTS
117 select HAVE_CACHE_SPLIT
118 help
119 Freescale Coldfire 5207/5208 processor support.
120
121config M523x
122 bool "MCF523x"
123 depends on !MMU
124 select COLDFIRE
125 select GENERIC_CLOCKEVENTS
126 select HAVE_CACHE_SPLIT
127 select HAVE_IPSBAR
128 help
129 Freescale Coldfire 5230/1/2/4/5 processor support
130
131config M5249
132 bool "MCF5249"
133 depends on !MMU
134 select COLDFIRE
135 select COLDFIRE_SW_A7
136 select HAVE_MBAR
137 help
138 Motorola ColdFire 5249 processor support.
139
140config M527x
141 bool
142
143config M5271
144 bool "MCF5271"
145 depends on !MMU
146 select COLDFIRE
147 select M527x
148 select HAVE_CACHE_SPLIT
149 select HAVE_IPSBAR
150 select GENERIC_CLOCKEVENTS
151 help
152 Freescale (Motorola) ColdFire 5270/5271 processor support.
153
154config M5272
155 bool "MCF5272"
156 depends on !MMU
157 select COLDFIRE
158 select COLDFIRE_SW_A7
159 select HAVE_MBAR
160 help
161 Motorola ColdFire 5272 processor support.
162
163config M5275
164 bool "MCF5275"
165 depends on !MMU
166 select COLDFIRE
167 select M527x
168 select HAVE_CACHE_SPLIT
169 select HAVE_IPSBAR
170 select GENERIC_CLOCKEVENTS
171 help
172 Freescale (Motorola) ColdFire 5274/5275 processor support.
173
174config M528x
175 bool "MCF528x"
176 depends on !MMU
177 select COLDFIRE
178 select GENERIC_CLOCKEVENTS
179 select HAVE_CACHE_SPLIT
180 select HAVE_IPSBAR
181 help
182 Motorola ColdFire 5280/5282 processor support.
183
184config M5307
185 bool "MCF5307"
186 depends on !MMU
187 select COLDFIRE
188 select COLDFIRE_SW_A7
189 select HAVE_CACHE_CB
190 select HAVE_MBAR
191 help
192 Motorola ColdFire 5307 processor support.
193
194config M532x
195 bool "MCF532x"
196 depends on !MMU
197 select COLDFIRE
198 select HAVE_CACHE_CB
199 help
200 Freescale (Motorola) ColdFire 532x processor support.
201
202config M5407
203 bool "MCF5407"
204 depends on !MMU
205 select COLDFIRE
206 select COLDFIRE_SW_A7
207 select HAVE_CACHE_CB
208 select HAVE_MBAR
209 help
210 Motorola ColdFire 5407 processor support.
211
212config M54xx
213 bool
214
215config M547x
216 bool "MCF547x"
217 depends on !MMU
218 select COLDFIRE
219 select M54xx
220 select HAVE_CACHE_CB
221 select HAVE_MBAR
222 help
223 Freescale ColdFire 5470/5471/5472/5473/5474/5475 processor support.
224
225config M548x
226 bool "MCF548x"
227 depends on !MMU
228 select COLDFIRE
229 select M54xx
230 select HAVE_CACHE_CB
231 select HAVE_MBAR
232 help
233 Freescale ColdFire 5480/5481/5482/5483/5484/5485 processor support.
234
235
236comment "Processor Specific Options"
237
238config M68KFPU_EMU
239 bool "Math emulation support (EXPERIMENTAL)"
240 depends on MMU
241 depends on EXPERIMENTAL
242 help
243 At some point in the future, this will cause floating-point math
244 instructions to be emulated by the kernel on machines that lack a
245 floating-point math coprocessor. Thrill-seekers and chronically
246 sleep-deprived psychotic hacker types can say Y now, everyone else
247 should probably wait a while.
248
249config M68KFPU_EMU_EXTRAPREC
250 bool "Math emulation extra precision"
251 depends on M68KFPU_EMU
252 help
253 The fpu uses normally a few bit more during calculations for
254 correct rounding, the emulator can (often) do the same but this
255 extra calculation can cost quite some time, so you can disable
256 it here. The emulator will then "only" calculate with a 64 bit
257 mantissa and round slightly incorrect, what is more than enough
258 for normal usage.
259
260config M68KFPU_EMU_ONLY
261 bool "Math emulation only kernel"
262 depends on M68KFPU_EMU
263 help
264 This option prevents any floating-point instructions from being
265 compiled into the kernel, thereby the kernel doesn't save any
266 floating point context anymore during task switches, so this
267 kernel will only be usable on machines without a floating-point
268 math coprocessor. This makes the kernel a bit faster as no tests
269 needs to be executed whether a floating-point instruction in the
270 kernel should be executed or not.
271
272config ADVANCED
273 bool "Advanced configuration options"
274 depends on MMU
275 ---help---
276 This gives you access to some advanced options for the CPU. The
277 defaults should be fine for most users, but these options may make
278 it possible for you to improve performance somewhat if you know what
279 you are doing.
280
281 Note that the answer to this question won't directly affect the
282 kernel: saying N will just cause the configurator to skip all
283 the questions about these options.
284
285 Most users should say N to this question.
286
287config RMW_INSNS
288 bool "Use read-modify-write instructions"
289 depends on ADVANCED
290 ---help---
291 This allows to use certain instructions that work with indivisible
292 read-modify-write bus cycles. While this is faster than the
293 workaround of disabling interrupts, it can conflict with DMA
294 ( = direct memory access) on many Amiga systems, and it is also said
295 to destabilize other machines. It is very likely that this will
296 cause serious problems on any Amiga or Atari Medusa if set. The only
297 configuration where it should work are 68030-based Ataris, where it
298 apparently improves performance. But you've been warned! Unless you
299 really know what you are doing, say N. Try Y only if you're quite
300 adventurous.
301
302config SINGLE_MEMORY_CHUNK
303 bool "Use one physical chunk of memory only" if ADVANCED && !SUN3
304 depends on MMU
305 default y if SUN3
306 select NEED_MULTIPLE_NODES
307 help
308 Ignore all but the first contiguous chunk of physical memory for VM
309 purposes. This will save a few bytes kernel size and may speed up
310 some operations. Say N if not sure.
311
312config ARCH_DISCONTIGMEM_ENABLE
313 def_bool MMU && !SINGLE_MEMORY_CHUNK
314
315config 060_WRITETHROUGH
316 bool "Use write-through caching for 68060 supervisor accesses"
317 depends on ADVANCED && M68060
318 ---help---
319 The 68060 generally uses copyback caching of recently accessed data.
320 Copyback caching means that memory writes will be held in an on-chip
321 cache and only written back to memory some time later. Saying Y
322 here will force supervisor (kernel) accesses to use writethrough
323 caching. Writethrough caching means that data is written to memory
324 straight away, so that cache and memory data always agree.
325 Writethrough caching is less efficient, but is needed for some
326 drivers on 68060 based systems where the 68060 bus snooping signal
327 is hardwired on. The 53c710 SCSI driver is known to suffer from
328 this problem.
329
330config M68K_L2_CACHE
331 bool
332 depends on MAC
333 default y
334
335config NODES_SHIFT
336 int
337 default "3"
338 depends on !SINGLE_MEMORY_CHUNK
339
340config FPU
341 bool
342
343config COLDFIRE_SW_A7
344 bool
345
346config HAVE_CACHE_SPLIT
347 bool
348
349config HAVE_CACHE_CB
350 bool
351
352config HAVE_MBAR
353 bool
354
355config HAVE_IPSBAR
356 bool
357
358config CLOCK_SET
359 bool "Enable setting the CPU clock frequency"
360 depends on COLDFIRE
361 default n
362 help
363 On some CPU's you do not need to know what the core CPU clock
364 frequency is. On these you can disable clock setting. On some
365 traditional 68K parts, and on all ColdFire parts you need to set
366 the appropriate CPU clock frequency. On these devices many of the
367 onboard peripherals derive their timing from the master CPU clock
368 frequency.
369
370config CLOCK_FREQ
371 int "Set the core clock frequency"
372 default "66666666"
373 depends on CLOCK_SET
374 help
375 Define the CPU clock frequency in use. This is the core clock
376 frequency, it may or may not be the same as the external clock
377 crystal fitted to your board. Some processors have an internal
378 PLL and can have their frequency programmed at run time, others
379 use internal dividers. In general the kernel won't setup a PLL
380 if it is fitted (there are some exceptions). This value will be
381 specific to the exact CPU that you are using.
382
383config OLDMASK
384 bool "Old mask 5307 (1H55J) silicon"
385 depends on M5307
386 help
387 Build support for the older revision ColdFire 5307 silicon.
388 Specifically this is the 1H55J mask revision.
389
390if HAVE_CACHE_SPLIT
391choice
392 prompt "Split Cache Configuration"
393 default CACHE_I
394
395config CACHE_I
396 bool "Instruction"
397 help
398 Use all of the ColdFire CPU cache memory as an instruction cache.
399
400config CACHE_D
401 bool "Data"
402 help
403 Use all of the ColdFire CPU cache memory as a data cache.
404
405config CACHE_BOTH
406 bool "Both"
407 help
408 Split the ColdFire CPU cache, and use half as an instruction cache
409 and half as a data cache.
410endchoice
411endif
412
413if HAVE_CACHE_CB
414choice
415 prompt "Data cache mode"
416 default CACHE_WRITETHRU
417
418config CACHE_WRITETHRU
419 bool "Write-through"
420 help
421 The ColdFire CPU cache is set into Write-through mode.
422
423config CACHE_COPYBACK
424 bool "Copy-back"
425 help
426 The ColdFire CPU cache is set into Copy-back mode.
427endchoice
428endif
429