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