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 23 select HAVE_ARCH_PFN_VALID
24 24
25 config COLDFIRE 25 config COLDFIRE
26 bool "Coldfire CPU family support" 26 bool "Coldfire CPU family support"
>> 27 select ARCH_HAVE_CUSTOM_GPIO_H
27 select CPU_HAS_NO_BITFIELDS 28 select CPU_HAS_NO_BITFIELDS
28 select CPU_HAS_NO_CAS <<
29 select CPU_HAS_NO_MULDIV64 29 select CPU_HAS_NO_MULDIV64
30 select GENERIC_CSUM 30 select GENERIC_CSUM
31 select GPIOLIB 31 select GPIOLIB
32 select HAVE_LEGACY_CLK 32 select HAVE_LEGACY_CLK
33 select HAVE_PAGE_SIZE_8KB if !MMU <<
34 33
35 endchoice 34 endchoice
36 35
37 if M68KCLASSIC 36 if M68KCLASSIC
38 37
39 config M68000 38 config M68000
40 def_bool y !! 39 bool
41 depends on !MMU 40 depends on !MMU
42 select CPU_HAS_NO_BITFIELDS 41 select CPU_HAS_NO_BITFIELDS
43 select CPU_HAS_NO_CAS <<
44 select CPU_HAS_NO_MULDIV64 42 select CPU_HAS_NO_MULDIV64
45 select CPU_HAS_NO_UNALIGNED 43 select CPU_HAS_NO_UNALIGNED
46 select GENERIC_CSUM 44 select GENERIC_CSUM
47 select CPU_NO_EFFICIENT_FFS 45 select CPU_NO_EFFICIENT_FFS
48 select HAVE_ARCH_HASH 46 select HAVE_ARCH_HASH
49 select HAVE_PAGE_SIZE_4KB <<
50 select LEGACY_TIMER_TICK <<
51 help 47 help
52 The Freescale (was Motorola) 68000 C 48 The Freescale (was Motorola) 68000 CPU is the first generation of
53 the well known M68K family of proces 49 the well known M68K family of processors. The CPU core as well as
54 being available as a stand alone CPU 50 being available as a stand alone CPU was also used in many
55 System-On-Chip devices (eg 68328, 68 51 System-On-Chip devices (eg 68328, 68302, etc). It does not contain
56 a paging MMU. 52 a paging MMU.
57 53
>> 54 config MCPU32
>> 55 bool
>> 56 select CPU_HAS_NO_BITFIELDS
>> 57 select CPU_HAS_NO_UNALIGNED
>> 58 select CPU_NO_EFFICIENT_FFS
>> 59 help
>> 60 The Freescale (was then Motorola) CPU32 is a CPU core that is
>> 61 based on the 68020 processor. For the most part it is used in
>> 62 System-On-Chip parts, and does not contain a paging MMU.
>> 63
58 config M68020 64 config M68020
59 bool "68020 support" 65 bool "68020 support"
60 depends on MMU 66 depends on MMU
61 select FPU 67 select FPU
62 select CPU_HAS_ADDRESS_SPACES 68 select CPU_HAS_ADDRESS_SPACES
63 help 69 help
64 If you anticipate running this kerne 70 If you anticipate running this kernel on a computer with a MC68020
65 processor, say Y. Otherwise, say N. 71 processor, say Y. Otherwise, say N. Note that the 68020 requires a
66 68851 MMU (Memory Management Unit) t 72 68851 MMU (Memory Management Unit) to run Linux/m68k, except on the
67 Sun 3, which provides its own versio 73 Sun 3, which provides its own version.
68 74
69 config M68030 75 config M68030
70 bool "68030 support" 76 bool "68030 support"
71 depends on MMU && !MMU_SUN3 77 depends on MMU && !MMU_SUN3
72 select FPU 78 select FPU
73 select CPU_HAS_ADDRESS_SPACES 79 select CPU_HAS_ADDRESS_SPACES
74 help 80 help
75 If you anticipate running this kerne 81 If you anticipate running this kernel on a computer with a MC68030
76 processor, say Y. Otherwise, say N. 82 processor, say Y. Otherwise, say N. Note that a MC68EC030 will not
77 work, as it does not include an MMU 83 work, as it does not include an MMU (Memory Management Unit).
78 84
79 config M68040 85 config M68040
80 bool "68040 support" 86 bool "68040 support"
81 depends on MMU && !MMU_SUN3 87 depends on MMU && !MMU_SUN3
82 select FPU 88 select FPU
83 select CPU_HAS_ADDRESS_SPACES 89 select CPU_HAS_ADDRESS_SPACES
84 help 90 help
85 If you anticipate running this kerne 91 If you anticipate running this kernel on a computer with a MC68LC040
86 or MC68040 processor, say Y. Otherwi 92 or MC68040 processor, say Y. Otherwise, say N. Note that an
87 MC68EC040 will not work, as it does 93 MC68EC040 will not work, as it does not include an MMU (Memory
88 Management Unit). 94 Management Unit).
89 95
90 config M68060 96 config M68060
91 bool "68060 support" 97 bool "68060 support"
92 depends on MMU && !MMU_SUN3 98 depends on MMU && !MMU_SUN3
93 select FPU 99 select FPU
94 select CPU_HAS_ADDRESS_SPACES 100 select CPU_HAS_ADDRESS_SPACES
95 help 101 help
96 If you anticipate running this kerne 102 If you anticipate running this kernel on a computer with a MC68060
97 processor, say Y. Otherwise, say N. 103 processor, say Y. Otherwise, say N.
98 104
99 config M68328 105 config M68328
100 bool 106 bool
101 depends on !MMU 107 depends on !MMU
>> 108 select LEGACY_TIMER_TICK
102 select M68000 109 select M68000
103 help 110 help
104 Motorola 68328 processor support. 111 Motorola 68328 processor support.
105 112
106 config M68EZ328 113 config M68EZ328
107 bool 114 bool
108 depends on !MMU 115 depends on !MMU
>> 116 select LEGACY_TIMER_TICK
109 select M68000 117 select M68000
110 help 118 help
111 Motorola 68EX328 processor support. 119 Motorola 68EX328 processor support.
112 120
113 config M68VZ328 121 config M68VZ328
114 bool 122 bool
115 depends on !MMU 123 depends on !MMU
>> 124 select LEGACY_TIMER_TICK
116 select M68000 125 select M68000
117 help 126 help
118 Motorola 68VZ328 processor support. 127 Motorola 68VZ328 processor support.
119 128
120 endif # M68KCLASSIC 129 endif # M68KCLASSIC
121 130
122 if COLDFIRE 131 if COLDFIRE
123 132
124 choice 133 choice
125 prompt "ColdFire SoC type" 134 prompt "ColdFire SoC type"
126 default M520x 135 default M520x
127 help 136 help
128 Select the type of ColdFire System-o 137 Select the type of ColdFire System-on-Chip (SoC) that you want
129 to build for. 138 to build for.
130 139
131 config M5206 140 config M5206
132 bool "MCF5206" 141 bool "MCF5206"
133 depends on !MMU 142 depends on !MMU
134 select COLDFIRE_SW_A7 143 select COLDFIRE_SW_A7
135 select COLDFIRE_TIMERS 144 select COLDFIRE_TIMERS
136 select HAVE_MBAR 145 select HAVE_MBAR
137 select CPU_NO_EFFICIENT_FFS 146 select CPU_NO_EFFICIENT_FFS
138 help 147 help
139 Motorola ColdFire 5206 processor sup 148 Motorola ColdFire 5206 processor support.
140 149
141 config M5206e 150 config M5206e
142 bool "MCF5206e" 151 bool "MCF5206e"
143 depends on !MMU 152 depends on !MMU
144 select COLDFIRE_SW_A7 153 select COLDFIRE_SW_A7
145 select COLDFIRE_TIMERS 154 select COLDFIRE_TIMERS
146 select HAVE_MBAR 155 select HAVE_MBAR
147 select CPU_NO_EFFICIENT_FFS 156 select CPU_NO_EFFICIENT_FFS
148 help 157 help
149 Motorola ColdFire 5206e processor su 158 Motorola ColdFire 5206e processor support.
150 159
151 config M520x 160 config M520x
152 bool "MCF520x" 161 bool "MCF520x"
153 depends on !MMU 162 depends on !MMU
154 select COLDFIRE_PIT_TIMER 163 select COLDFIRE_PIT_TIMER
155 select HAVE_CACHE_SPLIT 164 select HAVE_CACHE_SPLIT
156 help 165 help
157 Freescale Coldfire 5207/5208 process !! 166 Freescale Coldfire 5207/5208 processor support.
158 167
159 config M523x 168 config M523x
160 bool "MCF523x" 169 bool "MCF523x"
161 depends on !MMU 170 depends on !MMU
162 select COLDFIRE_PIT_TIMER 171 select COLDFIRE_PIT_TIMER
163 select HAVE_CACHE_SPLIT 172 select HAVE_CACHE_SPLIT
164 select HAVE_IPSBAR 173 select HAVE_IPSBAR
165 help 174 help
166 Freescale Coldfire 5230/1/2/4/5 proc 175 Freescale Coldfire 5230/1/2/4/5 processor support
167 176
168 config M5249 177 config M5249
169 bool "MCF5249" 178 bool "MCF5249"
170 depends on !MMU 179 depends on !MMU
171 select COLDFIRE_SW_A7 180 select COLDFIRE_SW_A7
172 select COLDFIRE_TIMERS 181 select COLDFIRE_TIMERS
173 select HAVE_MBAR 182 select HAVE_MBAR
174 select CPU_NO_EFFICIENT_FFS 183 select CPU_NO_EFFICIENT_FFS
175 help 184 help
176 Motorola ColdFire 5249 processor sup 185 Motorola ColdFire 5249 processor support.
177 186
178 config M525x 187 config M525x
179 bool "MCF525x" 188 bool "MCF525x"
180 depends on !MMU 189 depends on !MMU
181 select COLDFIRE_SW_A7 190 select COLDFIRE_SW_A7
182 select COLDFIRE_TIMERS 191 select COLDFIRE_TIMERS
183 select HAVE_MBAR 192 select HAVE_MBAR
184 select CPU_NO_EFFICIENT_FFS 193 select CPU_NO_EFFICIENT_FFS
185 help 194 help
186 Freescale (Motorola) Coldfire 5251/5 195 Freescale (Motorola) Coldfire 5251/5253 processor support.
187 196
188 config M5271 197 config M5271
189 bool "MCF5271" 198 bool "MCF5271"
190 depends on !MMU 199 depends on !MMU
191 select COLDFIRE_PIT_TIMER 200 select COLDFIRE_PIT_TIMER
192 select M527x 201 select M527x
193 select HAVE_CACHE_SPLIT 202 select HAVE_CACHE_SPLIT
194 select HAVE_IPSBAR 203 select HAVE_IPSBAR
195 help 204 help
196 Freescale (Motorola) ColdFire 5270/5 205 Freescale (Motorola) ColdFire 5270/5271 processor support.
197 206
198 config M5272 207 config M5272
199 bool "MCF5272" 208 bool "MCF5272"
200 depends on !MMU 209 depends on !MMU
201 select COLDFIRE_SW_A7 210 select COLDFIRE_SW_A7
202 select COLDFIRE_TIMERS 211 select COLDFIRE_TIMERS
203 select HAVE_MBAR 212 select HAVE_MBAR
204 select CPU_NO_EFFICIENT_FFS 213 select CPU_NO_EFFICIENT_FFS
205 help 214 help
206 Motorola ColdFire 5272 processor sup 215 Motorola ColdFire 5272 processor support.
207 216
208 config M5275 217 config M5275
209 bool "MCF5275" 218 bool "MCF5275"
210 depends on !MMU 219 depends on !MMU
211 select COLDFIRE_PIT_TIMER 220 select COLDFIRE_PIT_TIMER
212 select M527x 221 select M527x
213 select HAVE_CACHE_SPLIT 222 select HAVE_CACHE_SPLIT
214 select HAVE_IPSBAR 223 select HAVE_IPSBAR
215 help 224 help
216 Freescale (Motorola) ColdFire 5274/5 225 Freescale (Motorola) ColdFire 5274/5275 processor support.
217 226
218 config M528x 227 config M528x
219 bool "MCF528x" 228 bool "MCF528x"
220 depends on !MMU 229 depends on !MMU
221 select COLDFIRE_PIT_TIMER 230 select COLDFIRE_PIT_TIMER
222 select HAVE_CACHE_SPLIT 231 select HAVE_CACHE_SPLIT
223 select HAVE_IPSBAR 232 select HAVE_IPSBAR
224 help 233 help
225 Motorola ColdFire 5280/5282 processo 234 Motorola ColdFire 5280/5282 processor support.
226 235
227 config M5307 236 config M5307
228 bool "MCF5307" 237 bool "MCF5307"
229 depends on !MMU 238 depends on !MMU
230 select COLDFIRE_TIMERS 239 select COLDFIRE_TIMERS
231 select COLDFIRE_SW_A7 240 select COLDFIRE_SW_A7
232 select HAVE_CACHE_CB 241 select HAVE_CACHE_CB
233 select HAVE_MBAR 242 select HAVE_MBAR
234 select CPU_NO_EFFICIENT_FFS 243 select CPU_NO_EFFICIENT_FFS
235 help 244 help
236 Motorola ColdFire 5307 processor sup 245 Motorola ColdFire 5307 processor support.
237 246
238 config M532x 247 config M532x
239 bool "MCF532x" 248 bool "MCF532x"
240 depends on !MMU 249 depends on !MMU
241 select COLDFIRE_TIMERS 250 select COLDFIRE_TIMERS
242 select M53xx 251 select M53xx
243 select HAVE_CACHE_CB 252 select HAVE_CACHE_CB
244 help 253 help
245 Freescale (Motorola) ColdFire 532x p 254 Freescale (Motorola) ColdFire 532x processor support.
246 255
247 config M537x 256 config M537x
248 bool "MCF537x" 257 bool "MCF537x"
249 depends on !MMU 258 depends on !MMU
250 select COLDFIRE_TIMERS 259 select COLDFIRE_TIMERS
251 select M53xx 260 select M53xx
252 select HAVE_CACHE_CB 261 select HAVE_CACHE_CB
253 help 262 help
254 Freescale ColdFire 537x processor su 263 Freescale ColdFire 537x processor support.
255 264
256 config M5407 265 config M5407
257 bool "MCF5407" 266 bool "MCF5407"
258 depends on !MMU 267 depends on !MMU
259 select COLDFIRE_SW_A7 268 select COLDFIRE_SW_A7
260 select COLDFIRE_TIMERS 269 select COLDFIRE_TIMERS
261 select HAVE_CACHE_CB 270 select HAVE_CACHE_CB
262 select HAVE_MBAR 271 select HAVE_MBAR
263 select CPU_NO_EFFICIENT_FFS 272 select CPU_NO_EFFICIENT_FFS
264 help 273 help
265 Motorola ColdFire 5407 processor sup 274 Motorola ColdFire 5407 processor support.
266 275
267 config M547x 276 config M547x
268 bool "MCF547x" 277 bool "MCF547x"
269 select M54xx 278 select M54xx
270 select COLDFIRE_SLTIMERS 279 select COLDFIRE_SLTIMERS
271 select MMU_COLDFIRE if MMU 280 select MMU_COLDFIRE if MMU
272 select FPU if MMU 281 select FPU if MMU
273 select HAVE_CACHE_CB 282 select HAVE_CACHE_CB
274 select HAVE_MBAR 283 select HAVE_MBAR
275 select CPU_NO_EFFICIENT_FFS 284 select CPU_NO_EFFICIENT_FFS
276 help 285 help
277 Freescale ColdFire 5470/5471/5472/54 286 Freescale ColdFire 5470/5471/5472/5473/5474/5475 processor support.
278 287
279 config M548x 288 config M548x
280 bool "MCF548x" 289 bool "MCF548x"
281 select COLDFIRE_SLTIMERS 290 select COLDFIRE_SLTIMERS
282 select MMU_COLDFIRE if MMU 291 select MMU_COLDFIRE if MMU
283 select FPU if MMU 292 select FPU if MMU
284 select M54xx 293 select M54xx
285 select HAVE_CACHE_CB 294 select HAVE_CACHE_CB
286 select HAVE_MBAR 295 select HAVE_MBAR
287 select CPU_NO_EFFICIENT_FFS 296 select CPU_NO_EFFICIENT_FFS
288 help 297 help
289 Freescale ColdFire 5480/5481/5482/54 298 Freescale ColdFire 5480/5481/5482/5483/5484/5485 processor support.
290 299
291 config M5441x 300 config M5441x
292 bool "MCF5441x" 301 bool "MCF5441x"
293 select COLDFIRE_PIT_TIMER 302 select COLDFIRE_PIT_TIMER
294 select MMU_COLDFIRE if MMU 303 select MMU_COLDFIRE if MMU
295 select HAVE_CACHE_CB 304 select HAVE_CACHE_CB
296 help 305 help
297 Freescale Coldfire 54410/54415/54416 306 Freescale Coldfire 54410/54415/54416/54417/54418 processor support.
298 307
299 endchoice 308 endchoice
300 309
301 config M527x 310 config M527x
302 bool 311 bool
303 312
304 config M53xx 313 config M53xx
305 bool 314 bool
306 315
307 config M54xx 316 config M54xx
308 select HAVE_PCI 317 select HAVE_PCI
309 bool 318 bool
310 319
311 config COLDFIRE_PIT_TIMER 320 config COLDFIRE_PIT_TIMER
312 bool 321 bool
313 322
314 config COLDFIRE_TIMERS 323 config COLDFIRE_TIMERS
315 bool 324 bool
316 select LEGACY_TIMER_TICK 325 select LEGACY_TIMER_TICK
317 326
318 config COLDFIRE_SLTIMERS 327 config COLDFIRE_SLTIMERS
319 bool 328 bool
320 select LEGACY_TIMER_TICK 329 select LEGACY_TIMER_TICK
321 330
322 endif # COLDFIRE 331 endif # COLDFIRE
323 332
>> 333
324 comment "Processor Specific Options" 334 comment "Processor Specific Options"
325 335
326 config M68KFPU_EMU 336 config M68KFPU_EMU
327 bool "Math emulation support" 337 bool "Math emulation support"
328 depends on M68KCLASSIC && FPU !! 338 depends on MMU
329 help 339 help
330 At some point in the future, this wi 340 At some point in the future, this will cause floating-point math
331 instructions to be emulated by the k 341 instructions to be emulated by the kernel on machines that lack a
332 floating-point math coprocessor. Th 342 floating-point math coprocessor. Thrill-seekers and chronically
333 sleep-deprived psychotic hacker type 343 sleep-deprived psychotic hacker types can say Y now, everyone else
334 should probably wait a while. 344 should probably wait a while.
335 345
336 config M68KFPU_EMU_EXTRAPREC 346 config M68KFPU_EMU_EXTRAPREC
337 bool "Math emulation extra precision" 347 bool "Math emulation extra precision"
338 depends on M68KFPU_EMU 348 depends on M68KFPU_EMU
339 help 349 help
340 The fpu uses normally a few bit more 350 The fpu uses normally a few bit more during calculations for
341 correct rounding, the emulator can ( 351 correct rounding, the emulator can (often) do the same but this
342 extra calculation can cost quite som 352 extra calculation can cost quite some time, so you can disable
343 it here. The emulator will then "onl 353 it here. The emulator will then "only" calculate with a 64 bit
344 mantissa and round slightly incorrec 354 mantissa and round slightly incorrect, what is more than enough
345 for normal usage. 355 for normal usage.
346 356
347 config M68KFPU_EMU_ONLY 357 config M68KFPU_EMU_ONLY
348 bool "Math emulation only kernel" 358 bool "Math emulation only kernel"
349 depends on M68KFPU_EMU 359 depends on M68KFPU_EMU
350 help 360 help
351 This option prevents any floating-po 361 This option prevents any floating-point instructions from being
352 compiled into the kernel, thereby th 362 compiled into the kernel, thereby the kernel doesn't save any
353 floating point context anymore durin 363 floating point context anymore during task switches, so this
354 kernel will only be usable on machin 364 kernel will only be usable on machines without a floating-point
355 math coprocessor. This makes the ker 365 math coprocessor. This makes the kernel a bit faster as no tests
356 needs to be executed whether a float 366 needs to be executed whether a floating-point instruction in the
357 kernel should be executed or not. 367 kernel should be executed or not.
358 368
359 config ADVANCED 369 config ADVANCED
360 bool "Advanced configuration options" 370 bool "Advanced configuration options"
361 depends on MMU 371 depends on MMU
362 help 372 help
363 This gives you access to some advanc 373 This gives you access to some advanced options for the CPU. The
364 defaults should be fine for most use 374 defaults should be fine for most users, but these options may make
365 it possible for you to improve perfo 375 it possible for you to improve performance somewhat if you know what
366 you are doing. 376 you are doing.
367 377
368 Note that the answer to this questio 378 Note that the answer to this question won't directly affect the
369 kernel: saying N will just cause the 379 kernel: saying N will just cause the configurator to skip all
370 the questions about these options. 380 the questions about these options.
371 381
372 Most users should say N to this ques 382 Most users should say N to this question.
373 383
374 config RMW_INSNS 384 config RMW_INSNS
375 bool "Use read-modify-write instructio 385 bool "Use read-modify-write instructions"
376 depends on ADVANCED && !CPU_HAS_NO_CAS !! 386 depends on ADVANCED
377 help 387 help
378 This allows to use certain instructi 388 This allows to use certain instructions that work with indivisible
379 read-modify-write bus cycles. While 389 read-modify-write bus cycles. While this is faster than the
380 workaround of disabling interrupts, 390 workaround of disabling interrupts, it can conflict with DMA
381 ( = direct memory access) on many Am 391 ( = direct memory access) on many Amiga systems, and it is also said
382 to destabilize other machines. It is 392 to destabilize other machines. It is very likely that this will
383 cause serious problems on any Amiga 393 cause serious problems on any Amiga or Atari Medusa if set. The only
384 configuration where it should work a 394 configuration where it should work are 68030-based Ataris, where it
385 apparently improves performance. But 395 apparently improves performance. But you've been warned! Unless you
386 really know what you are doing, say 396 really know what you are doing, say N. Try Y only if you're quite
387 adventurous. 397 adventurous.
388 398
389 config SINGLE_MEMORY_CHUNK 399 config SINGLE_MEMORY_CHUNK
390 bool "Use one physical chunk of memory 400 bool "Use one physical chunk of memory only" if ADVANCED && !SUN3
391 depends on MMU 401 depends on MMU
392 default y if SUN3 || MMU_COLDFIRE 402 default y if SUN3 || MMU_COLDFIRE
393 help 403 help
394 Ignore all but the first contiguous 404 Ignore all but the first contiguous chunk of physical memory for VM
395 purposes. This will save a few byte 405 purposes. This will save a few bytes kernel size and may speed up
396 some operations. 406 some operations.
397 When this option os set to N, you ma 407 When this option os set to N, you may want to lower "Maximum zone
398 order" to save memory that could be 408 order" to save memory that could be wasted for unused memory map.
399 Say N if not sure. 409 Say N if not sure.
400 410
401 config ARCH_FORCE_MAX_ORDER !! 411 config ARCH_DISCONTIGMEM_ENABLE
402 int "Order of maximal physically conti !! 412 depends on BROKEN
>> 413 def_bool MMU && !SINGLE_MEMORY_CHUNK
>> 414
>> 415 config FORCE_MAX_ZONEORDER
>> 416 int "Maximum zone order" if ADVANCED
403 depends on !SINGLE_MEMORY_CHUNK 417 depends on !SINGLE_MEMORY_CHUNK
404 default "10" !! 418 default "11"
405 help 419 help
406 The kernel page allocator limits the !! 420 The kernel memory allocator divides physically contiguous memory
407 contiguous allocations. The limit is !! 421 blocks into "zones", where each zone is a power of two number of
408 defines the maximal power of two of !! 422 pages. This option selects the largest power of two that the kernel
409 allocated as a single contiguous blo !! 423 keeps in the memory allocator. If you need to allocate very large
410 overriding the default setting when !! 424 blocks of physically contiguous memory, then you may need to
411 large blocks of physically contiguou !! 425 increase this value.
412 426
413 For systems that have holes in their 427 For systems that have holes in their physical address space this
414 value also defines the minimal size 428 value also defines the minimal size of the hole that allows
415 freeing unused memory map. 429 freeing unused memory map.
416 430
417 Don't change if unsure. !! 431 This config option is actually maximum order plus one. For example,
>> 432 a value of 11 means that the largest free memory block is 2^10 pages.
418 433
419 config 060_WRITETHROUGH 434 config 060_WRITETHROUGH
420 bool "Use write-through caching for 68 435 bool "Use write-through caching for 68060 supervisor accesses"
421 depends on ADVANCED && M68060 436 depends on ADVANCED && M68060
422 help 437 help
423 The 68060 generally uses copyback ca 438 The 68060 generally uses copyback caching of recently accessed data.
424 Copyback caching means that memory w 439 Copyback caching means that memory writes will be held in an on-chip
425 cache and only written back to memor 440 cache and only written back to memory some time later. Saying Y
426 here will force supervisor (kernel) 441 here will force supervisor (kernel) accesses to use writethrough
427 caching. Writethrough caching means 442 caching. Writethrough caching means that data is written to memory
428 straight away, so that cache and mem 443 straight away, so that cache and memory data always agree.
429 Writethrough caching is less efficie 444 Writethrough caching is less efficient, but is needed for some
430 drivers on 68060 based systems where 445 drivers on 68060 based systems where the 68060 bus snooping signal
431 is hardwired on. The 53c710 SCSI dr 446 is hardwired on. The 53c710 SCSI driver is known to suffer from
432 this problem. 447 this problem.
433 448
434 config M68K_L2_CACHE 449 config M68K_L2_CACHE
435 bool 450 bool
436 depends on MAC 451 depends on MAC
437 default y 452 default y
438 453
439 config CPU_HAS_NO_BITFIELDS !! 454 config NODES_SHIFT
440 bool !! 455 int
>> 456 default "3"
>> 457 depends on DISCONTIGMEM
441 458
442 config CPU_HAS_NO_CAS !! 459 config CPU_HAS_NO_BITFIELDS
443 bool 460 bool
444 461
445 config CPU_HAS_NO_MULDIV64 462 config CPU_HAS_NO_MULDIV64
446 bool 463 bool
447 464
448 config CPU_HAS_NO_UNALIGNED 465 config CPU_HAS_NO_UNALIGNED
449 bool 466 bool
450 467
451 config CPU_HAS_ADDRESS_SPACES 468 config CPU_HAS_ADDRESS_SPACES
452 bool 469 bool
453 select ALTERNATE_USER_ADDRESS_SPACE <<
454 470
455 config FPU 471 config FPU
456 bool 472 bool
457 473
458 config COLDFIRE_SW_A7 474 config COLDFIRE_SW_A7
459 bool 475 bool
460 476
461 config HAVE_CACHE_SPLIT 477 config HAVE_CACHE_SPLIT
462 bool 478 bool
463 479
464 config HAVE_CACHE_CB 480 config HAVE_CACHE_CB
465 bool 481 bool
466 482
467 config HAVE_MBAR 483 config HAVE_MBAR
468 bool 484 bool
469 485
470 config HAVE_IPSBAR 486 config HAVE_IPSBAR
471 bool 487 bool
472 488
473 config CLOCK_FREQ 489 config CLOCK_FREQ
474 int "Set the core clock frequency" 490 int "Set the core clock frequency"
475 default "25000000" if M5206 491 default "25000000" if M5206
476 default "54000000" if M5206e 492 default "54000000" if M5206e
477 default "166666666" if M520x 493 default "166666666" if M520x
478 default "140000000" if M5249 494 default "140000000" if M5249
479 default "150000000" if M527x || M523x 495 default "150000000" if M527x || M523x
480 default "90000000" if M5307 496 default "90000000" if M5307
481 default "50000000" if M5407 497 default "50000000" if M5407
482 default "266000000" if M54xx 498 default "266000000" if M54xx
483 default "66666666" 499 default "66666666"
484 depends on COLDFIRE 500 depends on COLDFIRE
485 help 501 help
486 Define the CPU clock frequency in us 502 Define the CPU clock frequency in use. This is the core clock
487 frequency, it may or may not be the 503 frequency, it may or may not be the same as the external clock
488 crystal fitted to your board. Some p 504 crystal fitted to your board. Some processors have an internal
489 PLL and can have their frequency pro 505 PLL and can have their frequency programmed at run time, others
490 use internal dividers. In general th 506 use internal dividers. In general the kernel won't setup a PLL
491 if it is fitted (there are some exce 507 if it is fitted (there are some exceptions). This value will be
492 specific to the exact CPU that you a 508 specific to the exact CPU that you are using.
493 509
494 config OLDMASK 510 config OLDMASK
495 bool "Old mask 5307 (1H55J) silicon" 511 bool "Old mask 5307 (1H55J) silicon"
496 depends on M5307 512 depends on M5307
497 help 513 help
498 Build support for the older revision 514 Build support for the older revision ColdFire 5307 silicon.
499 Specifically this is the 1H55J mask 515 Specifically this is the 1H55J mask revision.
500 516
501 if HAVE_CACHE_SPLIT 517 if HAVE_CACHE_SPLIT
502 choice 518 choice
503 prompt "Split Cache Configuration" 519 prompt "Split Cache Configuration"
504 default CACHE_I 520 default CACHE_I
505 521
506 config CACHE_I 522 config CACHE_I
507 bool "Instruction" 523 bool "Instruction"
508 help 524 help
509 Use all of the ColdFire CPU cache me 525 Use all of the ColdFire CPU cache memory as an instruction cache.
510 526
511 config CACHE_D 527 config CACHE_D
512 bool "Data" 528 bool "Data"
513 help 529 help
514 Use all of the ColdFire CPU cache me 530 Use all of the ColdFire CPU cache memory as a data cache.
515 531
516 config CACHE_BOTH 532 config CACHE_BOTH
517 bool "Both" 533 bool "Both"
518 help 534 help
519 Split the ColdFire CPU cache, and us 535 Split the ColdFire CPU cache, and use half as an instruction cache
520 and half as a data cache. 536 and half as a data cache.
521 endchoice 537 endchoice
522 endif # HAVE_CACHE_SPLIT !! 538 endif
523 539
524 if HAVE_CACHE_CB 540 if HAVE_CACHE_CB
525 choice 541 choice
526 prompt "Data cache mode" 542 prompt "Data cache mode"
527 default CACHE_WRITETHRU 543 default CACHE_WRITETHRU
528 544
529 config CACHE_WRITETHRU 545 config CACHE_WRITETHRU
530 bool "Write-through" 546 bool "Write-through"
531 help 547 help
532 The ColdFire CPU cache is set into W 548 The ColdFire CPU cache is set into Write-through mode.
533 549
534 config CACHE_COPYBACK 550 config CACHE_COPYBACK
535 bool "Copy-back" 551 bool "Copy-back"
536 help 552 help
537 The ColdFire CPU cache is set into C 553 The ColdFire CPU cache is set into Copy-back mode.
538 endchoice 554 endchoice
539 endif # HAVE_CACHE_CB !! 555 endif
540 556
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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