1 # SPDX-License-Identifier: GPL-2.0 1 # SPDX-License-Identifier: GPL-2.0
2 comment "Processor Type" 2 comment "Processor Type"
3 3
4 choice 4 choice
5 prompt "CPU family support" 5 prompt "CPU family support"
6 default M68KCLASSIC if MMU 6 default M68KCLASSIC if MMU
7 default COLDFIRE if !MMU 7 default COLDFIRE if !MMU
8 help 8 help
9 The Freescale (was Motorola) M68K fa 9 The Freescale (was Motorola) M68K family of processors implements
10 the full 68000 processor instruction 10 the full 68000 processor instruction set.
11 The Freescale ColdFire family of pro 11 The Freescale ColdFire family of processors is a modern derivative
12 of the 68000 processor family. They 12 of the 68000 processor family. They are mainly targeted at embedded
13 applications, and are all System-On- 13 applications, and are all System-On-Chip (SOC) devices, as opposed
14 to stand alone CPUs. They implement 14 to stand alone CPUs. They implement a subset of the original 68000
15 processor instruction set. 15 processor instruction set.
16 If you anticipate running this kerne 16 If you anticipate running this kernel on a computer with a classic
17 MC68xxx processor, select M68KCLASSI 17 MC68xxx processor, select M68KCLASSIC.
18 If you anticipate running this kerne 18 If you anticipate running this kernel on a computer with a ColdFire
19 processor, select COLDFIRE. 19 processor, select COLDFIRE.
20 20
21 config M68KCLASSIC 21 config M68KCLASSIC
22 bool "Classic M68K CPU family support" 22 bool "Classic M68K CPU family support"
23 select HAVE_ARCH_PFN_VALID <<
24 23
25 config COLDFIRE 24 config COLDFIRE
26 bool "Coldfire CPU family support" 25 bool "Coldfire CPU family support"
>> 26 select ARCH_HAVE_CUSTOM_GPIO_H
27 select CPU_HAS_NO_BITFIELDS 27 select CPU_HAS_NO_BITFIELDS
28 select CPU_HAS_NO_CAS <<
29 select CPU_HAS_NO_MULDIV64 28 select CPU_HAS_NO_MULDIV64
30 select GENERIC_CSUM 29 select GENERIC_CSUM
31 select GPIOLIB 30 select GPIOLIB
32 select HAVE_LEGACY_CLK !! 31 select HAVE_CLK
33 select HAVE_PAGE_SIZE_8KB if !MMU <<
34 32
35 endchoice 33 endchoice
36 34
37 if M68KCLASSIC 35 if M68KCLASSIC
38 36
39 config M68000 37 config M68000
40 def_bool y !! 38 bool "MC68000"
41 depends on !MMU 39 depends on !MMU
42 select CPU_HAS_NO_BITFIELDS 40 select CPU_HAS_NO_BITFIELDS
43 select CPU_HAS_NO_CAS <<
44 select CPU_HAS_NO_MULDIV64 41 select CPU_HAS_NO_MULDIV64
45 select CPU_HAS_NO_UNALIGNED 42 select CPU_HAS_NO_UNALIGNED
46 select GENERIC_CSUM 43 select GENERIC_CSUM
47 select CPU_NO_EFFICIENT_FFS 44 select CPU_NO_EFFICIENT_FFS
48 select HAVE_ARCH_HASH 45 select HAVE_ARCH_HASH
49 select HAVE_PAGE_SIZE_4KB <<
50 select LEGACY_TIMER_TICK <<
51 help 46 help
52 The Freescale (was Motorola) 68000 C 47 The Freescale (was Motorola) 68000 CPU is the first generation of
53 the well known M68K family of proces 48 the well known M68K family of processors. The CPU core as well as
54 being available as a stand alone CPU 49 being available as a stand alone CPU was also used in many
55 System-On-Chip devices (eg 68328, 68 50 System-On-Chip devices (eg 68328, 68302, etc). It does not contain
56 a paging MMU. 51 a paging MMU.
57 52
>> 53 config MCPU32
>> 54 bool
>> 55 select CPU_HAS_NO_BITFIELDS
>> 56 select CPU_HAS_NO_UNALIGNED
>> 57 select CPU_NO_EFFICIENT_FFS
>> 58 help
>> 59 The Freescale (was then Motorola) CPU32 is a CPU core that is
>> 60 based on the 68020 processor. For the most part it is used in
>> 61 System-On-Chip parts, and does not contain a paging MMU.
>> 62
58 config M68020 63 config M68020
59 bool "68020 support" 64 bool "68020 support"
60 depends on MMU 65 depends on MMU
61 select FPU 66 select FPU
62 select CPU_HAS_ADDRESS_SPACES 67 select CPU_HAS_ADDRESS_SPACES
63 help 68 help
64 If you anticipate running this kerne 69 If you anticipate running this kernel on a computer with a MC68020
65 processor, say Y. Otherwise, say N. 70 processor, say Y. Otherwise, say N. Note that the 68020 requires a
66 68851 MMU (Memory Management Unit) t 71 68851 MMU (Memory Management Unit) to run Linux/m68k, except on the
67 Sun 3, which provides its own versio 72 Sun 3, which provides its own version.
68 73
69 config M68030 74 config M68030
70 bool "68030 support" 75 bool "68030 support"
71 depends on MMU && !MMU_SUN3 76 depends on MMU && !MMU_SUN3
72 select FPU 77 select FPU
73 select CPU_HAS_ADDRESS_SPACES 78 select CPU_HAS_ADDRESS_SPACES
74 help 79 help
75 If you anticipate running this kerne 80 If you anticipate running this kernel on a computer with a MC68030
76 processor, say Y. Otherwise, say N. 81 processor, say Y. Otherwise, say N. Note that a MC68EC030 will not
77 work, as it does not include an MMU 82 work, as it does not include an MMU (Memory Management Unit).
78 83
79 config M68040 84 config M68040
80 bool "68040 support" 85 bool "68040 support"
81 depends on MMU && !MMU_SUN3 86 depends on MMU && !MMU_SUN3
82 select FPU 87 select FPU
83 select CPU_HAS_ADDRESS_SPACES 88 select CPU_HAS_ADDRESS_SPACES
84 help 89 help
85 If you anticipate running this kerne 90 If you anticipate running this kernel on a computer with a MC68LC040
86 or MC68040 processor, say Y. Otherwi 91 or MC68040 processor, say Y. Otherwise, say N. Note that an
87 MC68EC040 will not work, as it does 92 MC68EC040 will not work, as it does not include an MMU (Memory
88 Management Unit). 93 Management Unit).
89 94
90 config M68060 95 config M68060
91 bool "68060 support" 96 bool "68060 support"
92 depends on MMU && !MMU_SUN3 97 depends on MMU && !MMU_SUN3
93 select FPU 98 select FPU
94 select CPU_HAS_ADDRESS_SPACES 99 select CPU_HAS_ADDRESS_SPACES
95 help 100 help
96 If you anticipate running this kerne 101 If you anticipate running this kernel on a computer with a MC68060
97 processor, say Y. Otherwise, say N. 102 processor, say Y. Otherwise, say N.
98 103
99 config M68328 104 config M68328
100 bool !! 105 bool "MC68328"
101 depends on !MMU 106 depends on !MMU
102 select M68000 107 select M68000
103 help 108 help
104 Motorola 68328 processor support. 109 Motorola 68328 processor support.
105 110
106 config M68EZ328 111 config M68EZ328
107 bool !! 112 bool "MC68EZ328"
108 depends on !MMU 113 depends on !MMU
109 select M68000 114 select M68000
110 help 115 help
111 Motorola 68EX328 processor support. 116 Motorola 68EX328 processor support.
112 117
113 config M68VZ328 118 config M68VZ328
114 bool !! 119 bool "MC68VZ328"
115 depends on !MMU 120 depends on !MMU
116 select M68000 121 select M68000
117 help 122 help
118 Motorola 68VZ328 processor support. 123 Motorola 68VZ328 processor support.
119 124
120 endif # M68KCLASSIC 125 endif # M68KCLASSIC
121 126
122 if COLDFIRE 127 if COLDFIRE
123 128
124 choice 129 choice
125 prompt "ColdFire SoC type" 130 prompt "ColdFire SoC type"
126 default M520x 131 default M520x
127 help 132 help
128 Select the type of ColdFire System-o 133 Select the type of ColdFire System-on-Chip (SoC) that you want
129 to build for. 134 to build for.
130 135
131 config M5206 136 config M5206
132 bool "MCF5206" 137 bool "MCF5206"
133 depends on !MMU 138 depends on !MMU
134 select COLDFIRE_SW_A7 139 select COLDFIRE_SW_A7
135 select COLDFIRE_TIMERS <<
136 select HAVE_MBAR 140 select HAVE_MBAR
137 select CPU_NO_EFFICIENT_FFS 141 select CPU_NO_EFFICIENT_FFS
138 help 142 help
139 Motorola ColdFire 5206 processor sup 143 Motorola ColdFire 5206 processor support.
140 144
141 config M5206e 145 config M5206e
142 bool "MCF5206e" 146 bool "MCF5206e"
143 depends on !MMU 147 depends on !MMU
144 select COLDFIRE_SW_A7 148 select COLDFIRE_SW_A7
145 select COLDFIRE_TIMERS <<
146 select HAVE_MBAR 149 select HAVE_MBAR
147 select CPU_NO_EFFICIENT_FFS 150 select CPU_NO_EFFICIENT_FFS
148 help 151 help
149 Motorola ColdFire 5206e processor su 152 Motorola ColdFire 5206e processor support.
150 153
151 config M520x 154 config M520x
152 bool "MCF520x" 155 bool "MCF520x"
153 depends on !MMU 156 depends on !MMU
154 select COLDFIRE_PIT_TIMER !! 157 select GENERIC_CLOCKEVENTS
155 select HAVE_CACHE_SPLIT 158 select HAVE_CACHE_SPLIT
156 help 159 help
157 Freescale Coldfire 5207/5208 process !! 160 Freescale Coldfire 5207/5208 processor support.
158 161
159 config M523x 162 config M523x
160 bool "MCF523x" 163 bool "MCF523x"
161 depends on !MMU 164 depends on !MMU
162 select COLDFIRE_PIT_TIMER !! 165 select GENERIC_CLOCKEVENTS
163 select HAVE_CACHE_SPLIT 166 select HAVE_CACHE_SPLIT
164 select HAVE_IPSBAR 167 select HAVE_IPSBAR
165 help 168 help
166 Freescale Coldfire 5230/1/2/4/5 proc 169 Freescale Coldfire 5230/1/2/4/5 processor support
167 170
168 config M5249 171 config M5249
169 bool "MCF5249" 172 bool "MCF5249"
170 depends on !MMU 173 depends on !MMU
171 select COLDFIRE_SW_A7 174 select COLDFIRE_SW_A7
172 select COLDFIRE_TIMERS <<
173 select HAVE_MBAR 175 select HAVE_MBAR
174 select CPU_NO_EFFICIENT_FFS 176 select CPU_NO_EFFICIENT_FFS
175 help 177 help
176 Motorola ColdFire 5249 processor sup 178 Motorola ColdFire 5249 processor support.
177 179
178 config M525x 180 config M525x
179 bool "MCF525x" 181 bool "MCF525x"
180 depends on !MMU 182 depends on !MMU
181 select COLDFIRE_SW_A7 183 select COLDFIRE_SW_A7
182 select COLDFIRE_TIMERS <<
183 select HAVE_MBAR 184 select HAVE_MBAR
184 select CPU_NO_EFFICIENT_FFS 185 select CPU_NO_EFFICIENT_FFS
185 help 186 help
186 Freescale (Motorola) Coldfire 5251/5 187 Freescale (Motorola) Coldfire 5251/5253 processor support.
187 188
188 config M5271 189 config M5271
189 bool "MCF5271" 190 bool "MCF5271"
190 depends on !MMU 191 depends on !MMU
191 select COLDFIRE_PIT_TIMER <<
192 select M527x 192 select M527x
193 select HAVE_CACHE_SPLIT 193 select HAVE_CACHE_SPLIT
194 select HAVE_IPSBAR 194 select HAVE_IPSBAR
>> 195 select GENERIC_CLOCKEVENTS
195 help 196 help
196 Freescale (Motorola) ColdFire 5270/5 197 Freescale (Motorola) ColdFire 5270/5271 processor support.
197 198
198 config M5272 199 config M5272
199 bool "MCF5272" 200 bool "MCF5272"
200 depends on !MMU 201 depends on !MMU
201 select COLDFIRE_SW_A7 202 select COLDFIRE_SW_A7
202 select COLDFIRE_TIMERS <<
203 select HAVE_MBAR 203 select HAVE_MBAR
204 select CPU_NO_EFFICIENT_FFS 204 select CPU_NO_EFFICIENT_FFS
205 help 205 help
206 Motorola ColdFire 5272 processor sup 206 Motorola ColdFire 5272 processor support.
207 207
208 config M5275 208 config M5275
209 bool "MCF5275" 209 bool "MCF5275"
210 depends on !MMU 210 depends on !MMU
211 select COLDFIRE_PIT_TIMER <<
212 select M527x 211 select M527x
213 select HAVE_CACHE_SPLIT 212 select HAVE_CACHE_SPLIT
214 select HAVE_IPSBAR 213 select HAVE_IPSBAR
>> 214 select GENERIC_CLOCKEVENTS
215 help 215 help
216 Freescale (Motorola) ColdFire 5274/5 216 Freescale (Motorola) ColdFire 5274/5275 processor support.
217 217
218 config M528x 218 config M528x
219 bool "MCF528x" 219 bool "MCF528x"
220 depends on !MMU 220 depends on !MMU
221 select COLDFIRE_PIT_TIMER !! 221 select GENERIC_CLOCKEVENTS
222 select HAVE_CACHE_SPLIT 222 select HAVE_CACHE_SPLIT
223 select HAVE_IPSBAR 223 select HAVE_IPSBAR
224 help 224 help
225 Motorola ColdFire 5280/5282 processo 225 Motorola ColdFire 5280/5282 processor support.
226 226
227 config M5307 227 config M5307
228 bool "MCF5307" 228 bool "MCF5307"
229 depends on !MMU 229 depends on !MMU
230 select COLDFIRE_TIMERS <<
231 select COLDFIRE_SW_A7 230 select COLDFIRE_SW_A7
232 select HAVE_CACHE_CB 231 select HAVE_CACHE_CB
233 select HAVE_MBAR 232 select HAVE_MBAR
234 select CPU_NO_EFFICIENT_FFS 233 select CPU_NO_EFFICIENT_FFS
235 help 234 help
236 Motorola ColdFire 5307 processor sup 235 Motorola ColdFire 5307 processor support.
237 236
238 config M532x 237 config M532x
239 bool "MCF532x" 238 bool "MCF532x"
240 depends on !MMU 239 depends on !MMU
241 select COLDFIRE_TIMERS <<
242 select M53xx 240 select M53xx
243 select HAVE_CACHE_CB 241 select HAVE_CACHE_CB
244 help 242 help
245 Freescale (Motorola) ColdFire 532x p 243 Freescale (Motorola) ColdFire 532x processor support.
246 244
247 config M537x 245 config M537x
248 bool "MCF537x" 246 bool "MCF537x"
249 depends on !MMU 247 depends on !MMU
250 select COLDFIRE_TIMERS <<
251 select M53xx 248 select M53xx
252 select HAVE_CACHE_CB 249 select HAVE_CACHE_CB
253 help 250 help
254 Freescale ColdFire 537x processor su 251 Freescale ColdFire 537x processor support.
255 252
256 config M5407 253 config M5407
257 bool "MCF5407" 254 bool "MCF5407"
258 depends on !MMU 255 depends on !MMU
259 select COLDFIRE_SW_A7 256 select COLDFIRE_SW_A7
260 select COLDFIRE_TIMERS <<
261 select HAVE_CACHE_CB 257 select HAVE_CACHE_CB
262 select HAVE_MBAR 258 select HAVE_MBAR
263 select CPU_NO_EFFICIENT_FFS 259 select CPU_NO_EFFICIENT_FFS
264 help 260 help
265 Motorola ColdFire 5407 processor sup 261 Motorola ColdFire 5407 processor support.
266 262
267 config M547x 263 config M547x
268 bool "MCF547x" 264 bool "MCF547x"
269 select M54xx 265 select M54xx
270 select COLDFIRE_SLTIMERS <<
271 select MMU_COLDFIRE if MMU 266 select MMU_COLDFIRE if MMU
272 select FPU if MMU 267 select FPU if MMU
273 select HAVE_CACHE_CB 268 select HAVE_CACHE_CB
274 select HAVE_MBAR 269 select HAVE_MBAR
275 select CPU_NO_EFFICIENT_FFS 270 select CPU_NO_EFFICIENT_FFS
276 help 271 help
277 Freescale ColdFire 5470/5471/5472/54 272 Freescale ColdFire 5470/5471/5472/5473/5474/5475 processor support.
278 273
279 config M548x 274 config M548x
280 bool "MCF548x" 275 bool "MCF548x"
281 select COLDFIRE_SLTIMERS <<
282 select MMU_COLDFIRE if MMU 276 select MMU_COLDFIRE if MMU
283 select FPU if MMU 277 select FPU if MMU
284 select M54xx 278 select M54xx
285 select HAVE_CACHE_CB 279 select HAVE_CACHE_CB
286 select HAVE_MBAR 280 select HAVE_MBAR
287 select CPU_NO_EFFICIENT_FFS 281 select CPU_NO_EFFICIENT_FFS
288 help 282 help
289 Freescale ColdFire 5480/5481/5482/54 283 Freescale ColdFire 5480/5481/5482/5483/5484/5485 processor support.
290 284
291 config M5441x 285 config M5441x
292 bool "MCF5441x" 286 bool "MCF5441x"
293 select COLDFIRE_PIT_TIMER <<
294 select MMU_COLDFIRE if MMU 287 select MMU_COLDFIRE if MMU
>> 288 select GENERIC_CLOCKEVENTS
295 select HAVE_CACHE_CB 289 select HAVE_CACHE_CB
296 help 290 help
297 Freescale Coldfire 54410/54415/54416 291 Freescale Coldfire 54410/54415/54416/54417/54418 processor support.
298 292
299 endchoice 293 endchoice
300 294
301 config M527x 295 config M527x
302 bool 296 bool
303 297
304 config M53xx 298 config M53xx
305 bool 299 bool
306 300
307 config M54xx 301 config M54xx
308 select HAVE_PCI 302 select HAVE_PCI
309 bool 303 bool
310 304
311 config COLDFIRE_PIT_TIMER <<
312 bool <<
313 <<
314 config COLDFIRE_TIMERS <<
315 bool <<
316 select LEGACY_TIMER_TICK <<
317 <<
318 config COLDFIRE_SLTIMERS <<
319 bool <<
320 select LEGACY_TIMER_TICK <<
321 <<
322 endif # COLDFIRE 305 endif # COLDFIRE
323 306
>> 307
324 comment "Processor Specific Options" 308 comment "Processor Specific Options"
325 309
326 config M68KFPU_EMU 310 config M68KFPU_EMU
327 bool "Math emulation support" 311 bool "Math emulation support"
328 depends on M68KCLASSIC && FPU 312 depends on M68KCLASSIC && FPU
329 help 313 help
330 At some point in the future, this wi 314 At some point in the future, this will cause floating-point math
331 instructions to be emulated by the k 315 instructions to be emulated by the kernel on machines that lack a
332 floating-point math coprocessor. Th 316 floating-point math coprocessor. Thrill-seekers and chronically
333 sleep-deprived psychotic hacker type 317 sleep-deprived psychotic hacker types can say Y now, everyone else
334 should probably wait a while. 318 should probably wait a while.
335 319
336 config M68KFPU_EMU_EXTRAPREC 320 config M68KFPU_EMU_EXTRAPREC
337 bool "Math emulation extra precision" 321 bool "Math emulation extra precision"
338 depends on M68KFPU_EMU 322 depends on M68KFPU_EMU
339 help 323 help
340 The fpu uses normally a few bit more 324 The fpu uses normally a few bit more during calculations for
341 correct rounding, the emulator can ( 325 correct rounding, the emulator can (often) do the same but this
342 extra calculation can cost quite som 326 extra calculation can cost quite some time, so you can disable
343 it here. The emulator will then "onl 327 it here. The emulator will then "only" calculate with a 64 bit
344 mantissa and round slightly incorrec 328 mantissa and round slightly incorrect, what is more than enough
345 for normal usage. 329 for normal usage.
346 330
347 config M68KFPU_EMU_ONLY 331 config M68KFPU_EMU_ONLY
348 bool "Math emulation only kernel" 332 bool "Math emulation only kernel"
349 depends on M68KFPU_EMU 333 depends on M68KFPU_EMU
350 help 334 help
351 This option prevents any floating-po 335 This option prevents any floating-point instructions from being
352 compiled into the kernel, thereby th 336 compiled into the kernel, thereby the kernel doesn't save any
353 floating point context anymore durin 337 floating point context anymore during task switches, so this
354 kernel will only be usable on machin 338 kernel will only be usable on machines without a floating-point
355 math coprocessor. This makes the ker 339 math coprocessor. This makes the kernel a bit faster as no tests
356 needs to be executed whether a float 340 needs to be executed whether a floating-point instruction in the
357 kernel should be executed or not. 341 kernel should be executed or not.
358 342
359 config ADVANCED 343 config ADVANCED
360 bool "Advanced configuration options" 344 bool "Advanced configuration options"
361 depends on MMU 345 depends on MMU
362 help !! 346 ---help---
363 This gives you access to some advanc 347 This gives you access to some advanced options for the CPU. The
364 defaults should be fine for most use 348 defaults should be fine for most users, but these options may make
365 it possible for you to improve perfo 349 it possible for you to improve performance somewhat if you know what
366 you are doing. 350 you are doing.
367 351
368 Note that the answer to this questio 352 Note that the answer to this question won't directly affect the
369 kernel: saying N will just cause the 353 kernel: saying N will just cause the configurator to skip all
370 the questions about these options. 354 the questions about these options.
371 355
372 Most users should say N to this ques 356 Most users should say N to this question.
373 357
374 config RMW_INSNS 358 config RMW_INSNS
375 bool "Use read-modify-write instructio 359 bool "Use read-modify-write instructions"
376 depends on ADVANCED && !CPU_HAS_NO_CAS !! 360 depends on ADVANCED
377 help !! 361 ---help---
378 This allows to use certain instructi 362 This allows to use certain instructions that work with indivisible
379 read-modify-write bus cycles. While 363 read-modify-write bus cycles. While this is faster than the
380 workaround of disabling interrupts, 364 workaround of disabling interrupts, it can conflict with DMA
381 ( = direct memory access) on many Am 365 ( = direct memory access) on many Amiga systems, and it is also said
382 to destabilize other machines. It is 366 to destabilize other machines. It is very likely that this will
383 cause serious problems on any Amiga 367 cause serious problems on any Amiga or Atari Medusa if set. The only
384 configuration where it should work a 368 configuration where it should work are 68030-based Ataris, where it
385 apparently improves performance. But 369 apparently improves performance. But you've been warned! Unless you
386 really know what you are doing, say 370 really know what you are doing, say N. Try Y only if you're quite
387 adventurous. 371 adventurous.
388 372
389 config SINGLE_MEMORY_CHUNK 373 config SINGLE_MEMORY_CHUNK
390 bool "Use one physical chunk of memory 374 bool "Use one physical chunk of memory only" if ADVANCED && !SUN3
391 depends on MMU 375 depends on MMU
392 default y if SUN3 || MMU_COLDFIRE !! 376 default y if SUN3
>> 377 select NEED_MULTIPLE_NODES
393 help 378 help
394 Ignore all but the first contiguous 379 Ignore all but the first contiguous chunk of physical memory for VM
395 purposes. This will save a few byte 380 purposes. This will save a few bytes kernel size and may speed up
396 some operations. !! 381 some operations. Say N if not sure.
397 When this option os set to N, you ma <<
398 order" to save memory that could be <<
399 Say N if not sure. <<
400 <<
401 config ARCH_FORCE_MAX_ORDER <<
402 int "Order of maximal physically conti <<
403 depends on !SINGLE_MEMORY_CHUNK <<
404 default "10" <<
405 help <<
406 The kernel page allocator limits the <<
407 contiguous allocations. The limit is <<
408 defines the maximal power of two of <<
409 allocated as a single contiguous blo <<
410 overriding the default setting when <<
411 large blocks of physically contiguou <<
412 <<
413 For systems that have holes in their <<
414 value also defines the minimal size <<
415 freeing unused memory map. <<
416 382
417 Don't change if unsure. !! 383 config ARCH_DISCONTIGMEM_ENABLE
>> 384 def_bool MMU && !SINGLE_MEMORY_CHUNK
418 385
419 config 060_WRITETHROUGH 386 config 060_WRITETHROUGH
420 bool "Use write-through caching for 68 387 bool "Use write-through caching for 68060 supervisor accesses"
421 depends on ADVANCED && M68060 388 depends on ADVANCED && M68060
422 help !! 389 ---help---
423 The 68060 generally uses copyback ca 390 The 68060 generally uses copyback caching of recently accessed data.
424 Copyback caching means that memory w 391 Copyback caching means that memory writes will be held in an on-chip
425 cache and only written back to memor 392 cache and only written back to memory some time later. Saying Y
426 here will force supervisor (kernel) 393 here will force supervisor (kernel) accesses to use writethrough
427 caching. Writethrough caching means 394 caching. Writethrough caching means that data is written to memory
428 straight away, so that cache and mem 395 straight away, so that cache and memory data always agree.
429 Writethrough caching is less efficie 396 Writethrough caching is less efficient, but is needed for some
430 drivers on 68060 based systems where 397 drivers on 68060 based systems where the 68060 bus snooping signal
431 is hardwired on. The 53c710 SCSI dr 398 is hardwired on. The 53c710 SCSI driver is known to suffer from
432 this problem. 399 this problem.
433 400
434 config M68K_L2_CACHE 401 config M68K_L2_CACHE
435 bool 402 bool
436 depends on MAC 403 depends on MAC
437 default y 404 default y
438 405
439 config CPU_HAS_NO_BITFIELDS !! 406 config NODES_SHIFT
440 bool !! 407 int
>> 408 default "3"
>> 409 depends on !SINGLE_MEMORY_CHUNK
441 410
442 config CPU_HAS_NO_CAS !! 411 config CPU_HAS_NO_BITFIELDS
443 bool 412 bool
444 413
445 config CPU_HAS_NO_MULDIV64 414 config CPU_HAS_NO_MULDIV64
446 bool 415 bool
447 416
448 config CPU_HAS_NO_UNALIGNED 417 config CPU_HAS_NO_UNALIGNED
449 bool 418 bool
450 419
451 config CPU_HAS_ADDRESS_SPACES 420 config CPU_HAS_ADDRESS_SPACES
452 bool 421 bool
453 select ALTERNATE_USER_ADDRESS_SPACE <<
454 422
455 config FPU 423 config FPU
456 bool 424 bool
457 425
458 config COLDFIRE_SW_A7 426 config COLDFIRE_SW_A7
459 bool 427 bool
460 428
461 config HAVE_CACHE_SPLIT 429 config HAVE_CACHE_SPLIT
462 bool 430 bool
463 431
464 config HAVE_CACHE_CB 432 config HAVE_CACHE_CB
465 bool 433 bool
466 434
467 config HAVE_MBAR 435 config HAVE_MBAR
468 bool 436 bool
469 437
470 config HAVE_IPSBAR 438 config HAVE_IPSBAR
471 bool 439 bool
472 440
473 config CLOCK_FREQ 441 config CLOCK_FREQ
474 int "Set the core clock frequency" 442 int "Set the core clock frequency"
475 default "25000000" if M5206 443 default "25000000" if M5206
476 default "54000000" if M5206e 444 default "54000000" if M5206e
477 default "166666666" if M520x 445 default "166666666" if M520x
478 default "140000000" if M5249 446 default "140000000" if M5249
479 default "150000000" if M527x || M523x 447 default "150000000" if M527x || M523x
480 default "90000000" if M5307 448 default "90000000" if M5307
481 default "50000000" if M5407 449 default "50000000" if M5407
482 default "266000000" if M54xx 450 default "266000000" if M54xx
483 default "66666666" 451 default "66666666"
484 depends on COLDFIRE 452 depends on COLDFIRE
485 help 453 help
486 Define the CPU clock frequency in us 454 Define the CPU clock frequency in use. This is the core clock
487 frequency, it may or may not be the 455 frequency, it may or may not be the same as the external clock
488 crystal fitted to your board. Some p 456 crystal fitted to your board. Some processors have an internal
489 PLL and can have their frequency pro 457 PLL and can have their frequency programmed at run time, others
490 use internal dividers. In general th 458 use internal dividers. In general the kernel won't setup a PLL
491 if it is fitted (there are some exce 459 if it is fitted (there are some exceptions). This value will be
492 specific to the exact CPU that you a 460 specific to the exact CPU that you are using.
493 461
494 config OLDMASK 462 config OLDMASK
495 bool "Old mask 5307 (1H55J) silicon" 463 bool "Old mask 5307 (1H55J) silicon"
496 depends on M5307 464 depends on M5307
497 help 465 help
498 Build support for the older revision 466 Build support for the older revision ColdFire 5307 silicon.
499 Specifically this is the 1H55J mask 467 Specifically this is the 1H55J mask revision.
500 468
501 if HAVE_CACHE_SPLIT 469 if HAVE_CACHE_SPLIT
502 choice 470 choice
503 prompt "Split Cache Configuration" 471 prompt "Split Cache Configuration"
504 default CACHE_I 472 default CACHE_I
505 473
506 config CACHE_I 474 config CACHE_I
507 bool "Instruction" 475 bool "Instruction"
508 help 476 help
509 Use all of the ColdFire CPU cache me 477 Use all of the ColdFire CPU cache memory as an instruction cache.
510 478
511 config CACHE_D 479 config CACHE_D
512 bool "Data" 480 bool "Data"
513 help 481 help
514 Use all of the ColdFire CPU cache me 482 Use all of the ColdFire CPU cache memory as a data cache.
515 483
516 config CACHE_BOTH 484 config CACHE_BOTH
517 bool "Both" 485 bool "Both"
518 help 486 help
519 Split the ColdFire CPU cache, and us 487 Split the ColdFire CPU cache, and use half as an instruction cache
520 and half as a data cache. 488 and half as a data cache.
521 endchoice 489 endchoice
522 endif # HAVE_CACHE_SPLIT !! 490 endif
523 491
524 if HAVE_CACHE_CB 492 if HAVE_CACHE_CB
525 choice 493 choice
526 prompt "Data cache mode" 494 prompt "Data cache mode"
527 default CACHE_WRITETHRU 495 default CACHE_WRITETHRU
528 496
529 config CACHE_WRITETHRU 497 config CACHE_WRITETHRU
530 bool "Write-through" 498 bool "Write-through"
531 help 499 help
532 The ColdFire CPU cache is set into W 500 The ColdFire CPU cache is set into Write-through mode.
533 501
534 config CACHE_COPYBACK 502 config CACHE_COPYBACK
535 bool "Copy-back" 503 bool "Copy-back"
536 help 504 help
537 The ColdFire CPU cache is set into C 505 The ColdFire CPU cache is set into Copy-back mode.
538 endchoice 506 endchoice
539 endif # HAVE_CACHE_CB !! 507 endif
540 <<
541 # Coldfire cores that do not have a data cache <<
542 config COLDFIRE_COHERENT_DMA <<
543 bool <<
544 default y <<
545 depends on COLDFIRE <<
546 depends on !HAVE_CACHE_CB && !CACHE_D <<
547 508
548 config M68K_NONCOHERENT_DMA <<
549 bool <<
550 default y <<
551 depends on HAS_DMA && !COLDFIRE_COHERE <<
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