1 # SPDX-License-Identifier: GPL-2.0 <<
2 comment "Processor Type" 1 comment "Processor Type"
3 2
4 choice 3 choice
5 prompt "CPU family support" 4 prompt "CPU family support"
6 default M68KCLASSIC if MMU 5 default M68KCLASSIC if MMU
7 default COLDFIRE if !MMU 6 default COLDFIRE if !MMU
8 help 7 help
9 The Freescale (was Motorola) M68K fa 8 The Freescale (was Motorola) M68K family of processors implements
10 the full 68000 processor instruction 9 the full 68000 processor instruction set.
11 The Freescale ColdFire family of pro 10 The Freescale ColdFire family of processors is a modern derivative
12 of the 68000 processor family. They 11 of the 68000 processor family. They are mainly targeted at embedded
13 applications, and are all System-On- 12 applications, and are all System-On-Chip (SOC) devices, as opposed
14 to stand alone CPUs. They implement 13 to stand alone CPUs. They implement a subset of the original 68000
15 processor instruction set. 14 processor instruction set.
16 If you anticipate running this kerne 15 If you anticipate running this kernel on a computer with a classic
17 MC68xxx processor, select M68KCLASSI 16 MC68xxx processor, select M68KCLASSIC.
18 If you anticipate running this kerne 17 If you anticipate running this kernel on a computer with a ColdFire
19 processor, select COLDFIRE. 18 processor, select COLDFIRE.
20 19
21 config M68KCLASSIC 20 config M68KCLASSIC
22 bool "Classic M68K CPU family support" 21 bool "Classic M68K CPU family support"
23 select HAVE_ARCH_PFN_VALID <<
24 22
25 config COLDFIRE 23 config COLDFIRE
26 bool "Coldfire CPU family support" 24 bool "Coldfire CPU family support"
>> 25 select ARCH_REQUIRE_GPIOLIB
>> 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 HAVE_CLK
32 select HAVE_LEGACY_CLK <<
33 select HAVE_PAGE_SIZE_8KB if !MMU <<
34 31
35 endchoice 32 endchoice
36 33
37 if M68KCLASSIC 34 if M68KCLASSIC
38 35
39 config M68000 36 config M68000
40 def_bool y !! 37 bool "MC68000"
41 depends on !MMU 38 depends on !MMU
42 select CPU_HAS_NO_BITFIELDS 39 select CPU_HAS_NO_BITFIELDS
43 select CPU_HAS_NO_CAS <<
44 select CPU_HAS_NO_MULDIV64 40 select CPU_HAS_NO_MULDIV64
45 select CPU_HAS_NO_UNALIGNED 41 select CPU_HAS_NO_UNALIGNED
46 select GENERIC_CSUM 42 select GENERIC_CSUM
47 select CPU_NO_EFFICIENT_FFS <<
48 select HAVE_ARCH_HASH <<
49 select HAVE_PAGE_SIZE_4KB <<
50 select LEGACY_TIMER_TICK <<
51 help 43 help
52 The Freescale (was Motorola) 68000 C 44 The Freescale (was Motorola) 68000 CPU is the first generation of
53 the well known M68K family of proces 45 the well known M68K family of processors. The CPU core as well as
54 being available as a stand alone CPU 46 being available as a stand alone CPU was also used in many
55 System-On-Chip devices (eg 68328, 68 47 System-On-Chip devices (eg 68328, 68302, etc). It does not contain
56 a paging MMU. 48 a paging MMU.
57 49
>> 50 config 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
58 config M68020 59 config M68020
59 bool "68020 support" 60 bool "68020 support"
60 depends on MMU 61 depends on MMU
61 select FPU <<
62 select CPU_HAS_ADDRESS_SPACES 62 select CPU_HAS_ADDRESS_SPACES
63 help 63 help
64 If you anticipate running this kerne 64 If you anticipate running this kernel on a computer with a MC68020
65 processor, say Y. Otherwise, say N. 65 processor, say Y. Otherwise, say N. Note that the 68020 requires a
66 68851 MMU (Memory Management Unit) t 66 68851 MMU (Memory Management Unit) to run Linux/m68k, except on the
67 Sun 3, which provides its own versio 67 Sun 3, which provides its own version.
68 68
69 config M68030 69 config M68030
70 bool "68030 support" 70 bool "68030 support"
71 depends on MMU && !MMU_SUN3 71 depends on MMU && !MMU_SUN3
72 select FPU <<
73 select CPU_HAS_ADDRESS_SPACES 72 select CPU_HAS_ADDRESS_SPACES
74 help 73 help
75 If you anticipate running this kerne 74 If you anticipate running this kernel on a computer with a MC68030
76 processor, say Y. Otherwise, say N. 75 processor, say Y. Otherwise, say N. Note that a MC68EC030 will not
77 work, as it does not include an MMU 76 work, as it does not include an MMU (Memory Management Unit).
78 77
79 config M68040 78 config M68040
80 bool "68040 support" 79 bool "68040 support"
81 depends on MMU && !MMU_SUN3 80 depends on MMU && !MMU_SUN3
82 select FPU <<
83 select CPU_HAS_ADDRESS_SPACES 81 select CPU_HAS_ADDRESS_SPACES
84 help 82 help
85 If you anticipate running this kerne 83 If you anticipate running this kernel on a computer with a MC68LC040
86 or MC68040 processor, say Y. Otherwi 84 or MC68040 processor, say Y. Otherwise, say N. Note that an
87 MC68EC040 will not work, as it does 85 MC68EC040 will not work, as it does not include an MMU (Memory
88 Management Unit). 86 Management Unit).
89 87
90 config M68060 88 config M68060
91 bool "68060 support" 89 bool "68060 support"
92 depends on MMU && !MMU_SUN3 90 depends on MMU && !MMU_SUN3
93 select FPU <<
94 select CPU_HAS_ADDRESS_SPACES 91 select CPU_HAS_ADDRESS_SPACES
95 help 92 help
96 If you anticipate running this kerne 93 If you anticipate running this kernel on a computer with a MC68060
97 processor, say Y. Otherwise, say N. 94 processor, say Y. Otherwise, say N.
98 95
99 config M68328 96 config M68328
100 bool !! 97 bool "MC68328"
101 depends on !MMU 98 depends on !MMU
102 select M68000 99 select M68000
103 help 100 help
104 Motorola 68328 processor support. 101 Motorola 68328 processor support.
105 102
106 config M68EZ328 103 config M68EZ328
107 bool !! 104 bool "MC68EZ328"
108 depends on !MMU 105 depends on !MMU
109 select M68000 106 select M68000
110 help 107 help
111 Motorola 68EX328 processor support. 108 Motorola 68EX328 processor support.
112 109
113 config M68VZ328 110 config M68VZ328
114 bool !! 111 bool "MC68VZ328"
115 depends on !MMU 112 depends on !MMU
116 select M68000 113 select M68000
117 help 114 help
118 Motorola 68VZ328 processor support. 115 Motorola 68VZ328 processor support.
119 116
>> 117 config M68360
>> 118 bool "MC68360"
>> 119 depends on !MMU
>> 120 select MCPU32
>> 121 help
>> 122 Motorola 68360 processor support.
>> 123
120 endif # M68KCLASSIC 124 endif # M68KCLASSIC
121 125
122 if COLDFIRE 126 if COLDFIRE
123 127
124 choice 128 choice
125 prompt "ColdFire SoC type" 129 prompt "ColdFire SoC type"
126 default M520x 130 default M520x
127 help 131 help
128 Select the type of ColdFire System-o 132 Select the type of ColdFire System-on-Chip (SoC) that you want
129 to build for. 133 to build for.
130 134
131 config M5206 135 config M5206
132 bool "MCF5206" 136 bool "MCF5206"
133 depends on !MMU 137 depends on !MMU
134 select COLDFIRE_SW_A7 138 select COLDFIRE_SW_A7
135 select COLDFIRE_TIMERS <<
136 select HAVE_MBAR 139 select HAVE_MBAR
137 select CPU_NO_EFFICIENT_FFS <<
138 help 140 help
139 Motorola ColdFire 5206 processor sup 141 Motorola ColdFire 5206 processor support.
140 142
141 config M5206e 143 config M5206e
142 bool "MCF5206e" 144 bool "MCF5206e"
143 depends on !MMU 145 depends on !MMU
144 select COLDFIRE_SW_A7 146 select COLDFIRE_SW_A7
145 select COLDFIRE_TIMERS <<
146 select HAVE_MBAR 147 select HAVE_MBAR
147 select CPU_NO_EFFICIENT_FFS <<
148 help 148 help
149 Motorola ColdFire 5206e processor su 149 Motorola ColdFire 5206e processor support.
150 150
151 config M520x 151 config M520x
152 bool "MCF520x" 152 bool "MCF520x"
153 depends on !MMU 153 depends on !MMU
154 select COLDFIRE_PIT_TIMER !! 154 select GENERIC_CLOCKEVENTS
155 select HAVE_CACHE_SPLIT 155 select HAVE_CACHE_SPLIT
156 help 156 help
157 Freescale Coldfire 5207/5208 process !! 157 Freescale Coldfire 5207/5208 processor support.
158 158
159 config M523x 159 config M523x
160 bool "MCF523x" 160 bool "MCF523x"
161 depends on !MMU 161 depends on !MMU
162 select COLDFIRE_PIT_TIMER !! 162 select GENERIC_CLOCKEVENTS
163 select HAVE_CACHE_SPLIT 163 select HAVE_CACHE_SPLIT
164 select HAVE_IPSBAR 164 select HAVE_IPSBAR
165 help 165 help
166 Freescale Coldfire 5230/1/2/4/5 proc 166 Freescale Coldfire 5230/1/2/4/5 processor support
167 167
168 config M5249 168 config M5249
169 bool "MCF5249" 169 bool "MCF5249"
170 depends on !MMU 170 depends on !MMU
171 select COLDFIRE_SW_A7 171 select COLDFIRE_SW_A7
172 select COLDFIRE_TIMERS <<
173 select HAVE_MBAR 172 select HAVE_MBAR
174 select CPU_NO_EFFICIENT_FFS <<
175 help 173 help
176 Motorola ColdFire 5249 processor sup 174 Motorola ColdFire 5249 processor support.
177 175
178 config M525x 176 config M525x
179 bool "MCF525x" 177 bool "MCF525x"
180 depends on !MMU 178 depends on !MMU
181 select COLDFIRE_SW_A7 179 select COLDFIRE_SW_A7
182 select COLDFIRE_TIMERS <<
183 select HAVE_MBAR 180 select HAVE_MBAR
184 select CPU_NO_EFFICIENT_FFS <<
185 help 181 help
186 Freescale (Motorola) Coldfire 5251/5 182 Freescale (Motorola) Coldfire 5251/5253 processor support.
187 183
188 config M5271 184 config M5271
189 bool "MCF5271" 185 bool "MCF5271"
190 depends on !MMU 186 depends on !MMU
191 select COLDFIRE_PIT_TIMER <<
192 select M527x 187 select M527x
193 select HAVE_CACHE_SPLIT 188 select HAVE_CACHE_SPLIT
194 select HAVE_IPSBAR 189 select HAVE_IPSBAR
>> 190 select GENERIC_CLOCKEVENTS
195 help 191 help
196 Freescale (Motorola) ColdFire 5270/5 192 Freescale (Motorola) ColdFire 5270/5271 processor support.
197 193
198 config M5272 194 config M5272
199 bool "MCF5272" 195 bool "MCF5272"
200 depends on !MMU 196 depends on !MMU
201 select COLDFIRE_SW_A7 197 select COLDFIRE_SW_A7
202 select COLDFIRE_TIMERS <<
203 select HAVE_MBAR 198 select HAVE_MBAR
204 select CPU_NO_EFFICIENT_FFS <<
205 help 199 help
206 Motorola ColdFire 5272 processor sup 200 Motorola ColdFire 5272 processor support.
207 201
208 config M5275 202 config M5275
209 bool "MCF5275" 203 bool "MCF5275"
210 depends on !MMU 204 depends on !MMU
211 select COLDFIRE_PIT_TIMER <<
212 select M527x 205 select M527x
213 select HAVE_CACHE_SPLIT 206 select HAVE_CACHE_SPLIT
214 select HAVE_IPSBAR 207 select HAVE_IPSBAR
>> 208 select GENERIC_CLOCKEVENTS
215 help 209 help
216 Freescale (Motorola) ColdFire 5274/5 210 Freescale (Motorola) ColdFire 5274/5275 processor support.
217 211
218 config M528x 212 config M528x
219 bool "MCF528x" 213 bool "MCF528x"
220 depends on !MMU 214 depends on !MMU
221 select COLDFIRE_PIT_TIMER !! 215 select GENERIC_CLOCKEVENTS
222 select HAVE_CACHE_SPLIT 216 select HAVE_CACHE_SPLIT
223 select HAVE_IPSBAR 217 select HAVE_IPSBAR
224 help 218 help
225 Motorola ColdFire 5280/5282 processo 219 Motorola ColdFire 5280/5282 processor support.
226 220
227 config M5307 221 config M5307
228 bool "MCF5307" 222 bool "MCF5307"
229 depends on !MMU 223 depends on !MMU
230 select COLDFIRE_TIMERS <<
231 select COLDFIRE_SW_A7 224 select COLDFIRE_SW_A7
232 select HAVE_CACHE_CB 225 select HAVE_CACHE_CB
233 select HAVE_MBAR 226 select HAVE_MBAR
234 select CPU_NO_EFFICIENT_FFS <<
235 help 227 help
236 Motorola ColdFire 5307 processor sup 228 Motorola ColdFire 5307 processor support.
237 229
238 config M532x 230 config M532x
239 bool "MCF532x" 231 bool "MCF532x"
240 depends on !MMU 232 depends on !MMU
241 select COLDFIRE_TIMERS <<
242 select M53xx 233 select M53xx
243 select HAVE_CACHE_CB 234 select HAVE_CACHE_CB
244 help 235 help
245 Freescale (Motorola) ColdFire 532x p 236 Freescale (Motorola) ColdFire 532x processor support.
246 237
247 config M537x 238 config M537x
248 bool "MCF537x" 239 bool "MCF537x"
249 depends on !MMU 240 depends on !MMU
250 select COLDFIRE_TIMERS <<
251 select M53xx 241 select M53xx
252 select HAVE_CACHE_CB 242 select HAVE_CACHE_CB
253 help 243 help
254 Freescale ColdFire 537x processor su 244 Freescale ColdFire 537x processor support.
255 245
256 config M5407 246 config M5407
257 bool "MCF5407" 247 bool "MCF5407"
258 depends on !MMU 248 depends on !MMU
259 select COLDFIRE_SW_A7 249 select COLDFIRE_SW_A7
260 select COLDFIRE_TIMERS <<
261 select HAVE_CACHE_CB 250 select HAVE_CACHE_CB
262 select HAVE_MBAR 251 select HAVE_MBAR
263 select CPU_NO_EFFICIENT_FFS <<
264 help 252 help
265 Motorola ColdFire 5407 processor sup 253 Motorola ColdFire 5407 processor support.
266 254
267 config M547x 255 config M547x
268 bool "MCF547x" 256 bool "MCF547x"
269 select M54xx 257 select M54xx
270 select COLDFIRE_SLTIMERS <<
271 select MMU_COLDFIRE if MMU 258 select MMU_COLDFIRE if MMU
272 select FPU if MMU <<
273 select HAVE_CACHE_CB 259 select HAVE_CACHE_CB
274 select HAVE_MBAR 260 select HAVE_MBAR
275 select CPU_NO_EFFICIENT_FFS <<
276 help 261 help
277 Freescale ColdFire 5470/5471/5472/54 262 Freescale ColdFire 5470/5471/5472/5473/5474/5475 processor support.
278 263
279 config M548x 264 config M548x
280 bool "MCF548x" 265 bool "MCF548x"
281 select COLDFIRE_SLTIMERS <<
282 select MMU_COLDFIRE if MMU 266 select MMU_COLDFIRE if MMU
283 select FPU if MMU <<
284 select M54xx 267 select M54xx
285 select HAVE_CACHE_CB 268 select HAVE_CACHE_CB
286 select HAVE_MBAR 269 select HAVE_MBAR
287 select CPU_NO_EFFICIENT_FFS <<
288 help 270 help
289 Freescale ColdFire 5480/5481/5482/54 271 Freescale ColdFire 5480/5481/5482/5483/5484/5485 processor support.
290 272
291 config M5441x 273 config M5441x
292 bool "MCF5441x" 274 bool "MCF5441x"
293 select COLDFIRE_PIT_TIMER !! 275 depends on !MMU
294 select MMU_COLDFIRE if MMU !! 276 select GENERIC_CLOCKEVENTS
295 select HAVE_CACHE_CB 277 select HAVE_CACHE_CB
296 help 278 help
297 Freescale Coldfire 54410/54415/54416 279 Freescale Coldfire 54410/54415/54416/54417/54418 processor support.
298 280
299 endchoice 281 endchoice
300 282
301 config M527x 283 config M527x
302 bool 284 bool
303 285
304 config M53xx 286 config M53xx
305 bool 287 bool
306 288
307 config M54xx 289 config M54xx
308 select HAVE_PCI <<
309 bool <<
310 <<
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 290 bool
320 select LEGACY_TIMER_TICK <<
321 291
322 endif # COLDFIRE 292 endif # COLDFIRE
323 293
>> 294
324 comment "Processor Specific Options" 295 comment "Processor Specific Options"
325 296
326 config M68KFPU_EMU 297 config M68KFPU_EMU
327 bool "Math emulation support" 298 bool "Math emulation support"
328 depends on M68KCLASSIC && FPU !! 299 depends on MMU
329 help 300 help
330 At some point in the future, this wi 301 At some point in the future, this will cause floating-point math
331 instructions to be emulated by the k 302 instructions to be emulated by the kernel on machines that lack a
332 floating-point math coprocessor. Th 303 floating-point math coprocessor. Thrill-seekers and chronically
333 sleep-deprived psychotic hacker type 304 sleep-deprived psychotic hacker types can say Y now, everyone else
334 should probably wait a while. 305 should probably wait a while.
335 306
336 config M68KFPU_EMU_EXTRAPREC 307 config M68KFPU_EMU_EXTRAPREC
337 bool "Math emulation extra precision" 308 bool "Math emulation extra precision"
338 depends on M68KFPU_EMU 309 depends on M68KFPU_EMU
339 help 310 help
340 The fpu uses normally a few bit more 311 The fpu uses normally a few bit more during calculations for
341 correct rounding, the emulator can ( 312 correct rounding, the emulator can (often) do the same but this
342 extra calculation can cost quite som 313 extra calculation can cost quite some time, so you can disable
343 it here. The emulator will then "onl 314 it here. The emulator will then "only" calculate with a 64 bit
344 mantissa and round slightly incorrec 315 mantissa and round slightly incorrect, what is more than enough
345 for normal usage. 316 for normal usage.
346 317
347 config M68KFPU_EMU_ONLY 318 config M68KFPU_EMU_ONLY
348 bool "Math emulation only kernel" 319 bool "Math emulation only kernel"
349 depends on M68KFPU_EMU 320 depends on M68KFPU_EMU
350 help 321 help
351 This option prevents any floating-po 322 This option prevents any floating-point instructions from being
352 compiled into the kernel, thereby th 323 compiled into the kernel, thereby the kernel doesn't save any
353 floating point context anymore durin 324 floating point context anymore during task switches, so this
354 kernel will only be usable on machin 325 kernel will only be usable on machines without a floating-point
355 math coprocessor. This makes the ker 326 math coprocessor. This makes the kernel a bit faster as no tests
356 needs to be executed whether a float 327 needs to be executed whether a floating-point instruction in the
357 kernel should be executed or not. 328 kernel should be executed or not.
358 329
359 config ADVANCED 330 config ADVANCED
360 bool "Advanced configuration options" 331 bool "Advanced configuration options"
361 depends on MMU 332 depends on MMU
362 help !! 333 ---help---
363 This gives you access to some advanc 334 This gives you access to some advanced options for the CPU. The
364 defaults should be fine for most use 335 defaults should be fine for most users, but these options may make
365 it possible for you to improve perfo 336 it possible for you to improve performance somewhat if you know what
366 you are doing. 337 you are doing.
367 338
368 Note that the answer to this questio 339 Note that the answer to this question won't directly affect the
369 kernel: saying N will just cause the 340 kernel: saying N will just cause the configurator to skip all
370 the questions about these options. 341 the questions about these options.
371 342
372 Most users should say N to this ques 343 Most users should say N to this question.
373 344
374 config RMW_INSNS 345 config RMW_INSNS
375 bool "Use read-modify-write instructio 346 bool "Use read-modify-write instructions"
376 depends on ADVANCED && !CPU_HAS_NO_CAS !! 347 depends on ADVANCED
377 help !! 348 ---help---
378 This allows to use certain instructi 349 This allows to use certain instructions that work with indivisible
379 read-modify-write bus cycles. While 350 read-modify-write bus cycles. While this is faster than the
380 workaround of disabling interrupts, 351 workaround of disabling interrupts, it can conflict with DMA
381 ( = direct memory access) on many Am 352 ( = direct memory access) on many Amiga systems, and it is also said
382 to destabilize other machines. It is 353 to destabilize other machines. It is very likely that this will
383 cause serious problems on any Amiga 354 cause serious problems on any Amiga or Atari Medusa if set. The only
384 configuration where it should work a 355 configuration where it should work are 68030-based Ataris, where it
385 apparently improves performance. But 356 apparently improves performance. But you've been warned! Unless you
386 really know what you are doing, say 357 really know what you are doing, say N. Try Y only if you're quite
387 adventurous. 358 adventurous.
388 359
389 config SINGLE_MEMORY_CHUNK 360 config SINGLE_MEMORY_CHUNK
390 bool "Use one physical chunk of memory 361 bool "Use one physical chunk of memory only" if ADVANCED && !SUN3
391 depends on MMU 362 depends on MMU
392 default y if SUN3 || MMU_COLDFIRE !! 363 default y if SUN3
>> 364 select NEED_MULTIPLE_NODES
393 help 365 help
394 Ignore all but the first contiguous 366 Ignore all but the first contiguous chunk of physical memory for VM
395 purposes. This will save a few byte 367 purposes. This will save a few bytes kernel size and may speed up
396 some operations. !! 368 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. <<
400 369
401 config ARCH_FORCE_MAX_ORDER !! 370 config ARCH_DISCONTIGMEM_ENABLE
402 int "Order of maximal physically conti !! 371 def_bool MMU && !SINGLE_MEMORY_CHUNK
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 <<
417 Don't change if unsure. <<
418 372
419 config 060_WRITETHROUGH 373 config 060_WRITETHROUGH
420 bool "Use write-through caching for 68 374 bool "Use write-through caching for 68060 supervisor accesses"
421 depends on ADVANCED && M68060 375 depends on ADVANCED && M68060
422 help !! 376 ---help---
423 The 68060 generally uses copyback ca 377 The 68060 generally uses copyback caching of recently accessed data.
424 Copyback caching means that memory w 378 Copyback caching means that memory writes will be held in an on-chip
425 cache and only written back to memor 379 cache and only written back to memory some time later. Saying Y
426 here will force supervisor (kernel) 380 here will force supervisor (kernel) accesses to use writethrough
427 caching. Writethrough caching means 381 caching. Writethrough caching means that data is written to memory
428 straight away, so that cache and mem 382 straight away, so that cache and memory data always agree.
429 Writethrough caching is less efficie 383 Writethrough caching is less efficient, but is needed for some
430 drivers on 68060 based systems where 384 drivers on 68060 based systems where the 68060 bus snooping signal
431 is hardwired on. The 53c710 SCSI dr 385 is hardwired on. The 53c710 SCSI driver is known to suffer from
432 this problem. 386 this problem.
433 387
434 config M68K_L2_CACHE 388 config M68K_L2_CACHE
435 bool 389 bool
436 depends on MAC 390 depends on MAC
437 default y 391 default y
438 392
439 config CPU_HAS_NO_BITFIELDS !! 393 config NODES_SHIFT
440 bool !! 394 int
>> 395 default "3"
>> 396 depends on !SINGLE_MEMORY_CHUNK
441 397
442 config CPU_HAS_NO_CAS !! 398 config CPU_HAS_NO_BITFIELDS
443 bool 399 bool
444 400
445 config CPU_HAS_NO_MULDIV64 401 config CPU_HAS_NO_MULDIV64
446 bool 402 bool
447 403
448 config CPU_HAS_NO_UNALIGNED 404 config CPU_HAS_NO_UNALIGNED
449 bool 405 bool
450 406
451 config CPU_HAS_ADDRESS_SPACES 407 config CPU_HAS_ADDRESS_SPACES
452 bool 408 bool
453 select ALTERNATE_USER_ADDRESS_SPACE <<
454 409
455 config FPU 410 config FPU
456 bool 411 bool
457 412
458 config COLDFIRE_SW_A7 413 config COLDFIRE_SW_A7
459 bool 414 bool
460 415
461 config HAVE_CACHE_SPLIT 416 config HAVE_CACHE_SPLIT
462 bool 417 bool
463 418
464 config HAVE_CACHE_CB 419 config HAVE_CACHE_CB
465 bool 420 bool
466 421
467 config HAVE_MBAR 422 config HAVE_MBAR
468 bool 423 bool
469 424
470 config HAVE_IPSBAR 425 config HAVE_IPSBAR
471 bool 426 bool
472 427
473 config CLOCK_FREQ 428 config CLOCK_FREQ
474 int "Set the core clock frequency" 429 int "Set the core clock frequency"
475 default "25000000" if M5206 430 default "25000000" if M5206
476 default "54000000" if M5206e 431 default "54000000" if M5206e
477 default "166666666" if M520x 432 default "166666666" if M520x
478 default "140000000" if M5249 433 default "140000000" if M5249
479 default "150000000" if M527x || M523x 434 default "150000000" if M527x || M523x
480 default "90000000" if M5307 435 default "90000000" if M5307
481 default "50000000" if M5407 436 default "50000000" if M5407
482 default "266000000" if M54xx 437 default "266000000" if M54xx
483 default "66666666" 438 default "66666666"
484 depends on COLDFIRE 439 depends on COLDFIRE
485 help 440 help
486 Define the CPU clock frequency in us 441 Define the CPU clock frequency in use. This is the core clock
487 frequency, it may or may not be the 442 frequency, it may or may not be the same as the external clock
488 crystal fitted to your board. Some p 443 crystal fitted to your board. Some processors have an internal
489 PLL and can have their frequency pro 444 PLL and can have their frequency programmed at run time, others
490 use internal dividers. In general th 445 use internal dividers. In general the kernel won't setup a PLL
491 if it is fitted (there are some exce 446 if it is fitted (there are some exceptions). This value will be
492 specific to the exact CPU that you a 447 specific to the exact CPU that you are using.
493 448
494 config OLDMASK 449 config OLDMASK
495 bool "Old mask 5307 (1H55J) silicon" 450 bool "Old mask 5307 (1H55J) silicon"
496 depends on M5307 451 depends on M5307
497 help 452 help
498 Build support for the older revision 453 Build support for the older revision ColdFire 5307 silicon.
499 Specifically this is the 1H55J mask 454 Specifically this is the 1H55J mask revision.
500 455
501 if HAVE_CACHE_SPLIT 456 if HAVE_CACHE_SPLIT
502 choice 457 choice
503 prompt "Split Cache Configuration" 458 prompt "Split Cache Configuration"
504 default CACHE_I 459 default CACHE_I
505 460
506 config CACHE_I 461 config CACHE_I
507 bool "Instruction" 462 bool "Instruction"
508 help 463 help
509 Use all of the ColdFire CPU cache me 464 Use all of the ColdFire CPU cache memory as an instruction cache.
510 465
511 config CACHE_D 466 config CACHE_D
512 bool "Data" 467 bool "Data"
513 help 468 help
514 Use all of the ColdFire CPU cache me 469 Use all of the ColdFire CPU cache memory as a data cache.
515 470
516 config CACHE_BOTH 471 config CACHE_BOTH
517 bool "Both" 472 bool "Both"
518 help 473 help
519 Split the ColdFire CPU cache, and us 474 Split the ColdFire CPU cache, and use half as an instruction cache
520 and half as a data cache. 475 and half as a data cache.
521 endchoice 476 endchoice
522 endif # HAVE_CACHE_SPLIT !! 477 endif
523 478
524 if HAVE_CACHE_CB 479 if HAVE_CACHE_CB
525 choice 480 choice
526 prompt "Data cache mode" 481 prompt "Data cache mode"
527 default CACHE_WRITETHRU 482 default CACHE_WRITETHRU
528 483
529 config CACHE_WRITETHRU 484 config CACHE_WRITETHRU
530 bool "Write-through" 485 bool "Write-through"
531 help 486 help
532 The ColdFire CPU cache is set into W 487 The ColdFire CPU cache is set into Write-through mode.
533 488
534 config CACHE_COPYBACK 489 config CACHE_COPYBACK
535 bool "Copy-back" 490 bool "Copy-back"
536 help 491 help
537 The ColdFire CPU cache is set into C 492 The ColdFire CPU cache is set into Copy-back mode.
538 endchoice 493 endchoice
539 endif # HAVE_CACHE_CB !! 494 endif
540 495
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 <<
548 config M68K_NONCOHERENT_DMA <<
549 bool <<
550 default y <<
551 depends on HAS_DMA && !COLDFIRE_COHERE <<
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