1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
|
/*
* (C) Copyright 2007
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* Author: Igor Lisitsin <igor@emcraft.com>
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <config.h>
#ifdef CONFIG_POST
#include <post.h>
#include <ppc_asm.tmpl>
#include <ppc_defs.h>
#include <asm/cache.h>
#include <asm/mmu.h>
#if CONFIG_POST & CFG_POST_CACHE
.text
/*
* All 44x variants deal with cache management differently
* because they have the address translation always enabled.
* The 40x ppc's don't use address translation in U-Boot at all,
* so we have to distinguish here between 40x and 44x.
*/
#ifdef CONFIG_440
/* void cache_post_disable (int tlb)
*/
cache_post_disable:
tlbre r0, r3, 0x0002
ori r0, r0, TLB_WORD2_I_ENABLE@l
tlbwe r0, r3, 0x0002
sync
isync
blr
/* void cache_post_wt (int tlb)
*/
cache_post_wt:
tlbre r0, r3, 0x0002
ori r0, r0, TLB_WORD2_W_ENABLE@l
andi. r0, r0, ~TLB_WORD2_I_ENABLE@l
tlbwe r0, r3, 0x0002
sync
isync
blr
/* void cache_post_wb (int tlb)
*/
cache_post_wb:
tlbre r0, r3, 0x0002
andi. r0, r0, ~TLB_WORD2_W_ENABLE@l
andi. r0, r0, ~TLB_WORD2_I_ENABLE@l
tlbwe r0, r3, 0x0002
sync
isync
blr
#else
/* void cache_post_disable (int tlb)
*/
cache_post_disable:
lis r0, 0x0000
ori r0, r0, 0x0000
mtdccr r0
sync
isync
blr
/* void cache_post_wt (int tlb)
*/
cache_post_wt:
lis r0, 0x8000
ori r0, r0, 0x0000
mtdccr r0
lis r0, 0x8000
ori r0, r0, 0x0000
mtdcwr r0
sync
isync
blr
/* void cache_post_wb (int tlb)
*/
cache_post_wb:
lis r0, 0x8000
ori r0, r0, 0x0000
mtdccr r0
lis r0, 0x0000
ori r0, r0, 0x0000
mtdcwr r0
sync
isync
blr
#endif
/* void cache_post_dinvalidate (void *p, int size)
*/
cache_post_dinvalidate:
dcbi r0, r3
addi r3, r3, CFG_CACHELINE_SIZE
subic. r4, r4, CFG_CACHELINE_SIZE
bgt cache_post_dinvalidate
sync
blr
/* void cache_post_dstore (void *p, int size)
*/
cache_post_dstore:
dcbst r0, r3
addi r3, r3, CFG_CACHELINE_SIZE
subic. r4, r4, CFG_CACHELINE_SIZE
bgt cache_post_dstore
sync
blr
/* void cache_post_dtouch (void *p, int size)
*/
cache_post_dtouch:
dcbt r0, r3
addi r3, r3, CFG_CACHELINE_SIZE
subic. r4, r4, CFG_CACHELINE_SIZE
bgt cache_post_dtouch
sync
blr
/* void cache_post_iinvalidate (void)
*/
cache_post_iinvalidate:
iccci r0, r0
sync
blr
/* void cache_post_memset (void *p, int val, int size)
*/
cache_post_memset:
mtctr r5
1:
stb r4, 0(r3)
addi r3, r3, 1
bdnz 1b
blr
/* int cache_post_check (void *p, int size)
*/
cache_post_check:
mtctr r4
1:
lbz r0, 0(r3)
addi r3, r3, 1
cmpwi r0, 0xff
bne 2f
bdnz 1b
li r3, 0
blr
2:
li r3, -1
blr
#define CACHE_POST_DISABLE() \
mr r3, r10; \
bl cache_post_disable
#define CACHE_POST_WT() \
mr r3, r10; \
bl cache_post_wt
#define CACHE_POST_WB() \
mr r3, r10; \
bl cache_post_wb
#define CACHE_POST_DINVALIDATE() \
mr r3, r11; \
mr r4, r12; \
bl cache_post_dinvalidate
#define CACHE_POST_DFLUSH() \
mr r3, r11; \
mr r4, r12; \
bl cache_post_dflush
#define CACHE_POST_DSTORE() \
mr r3, r11; \
mr r4, r12; \
bl cache_post_dstore
#define CACHE_POST_DTOUCH() \
mr r3, r11; \
mr r4, r12; \
bl cache_post_dtouch
#define CACHE_POST_IINVALIDATE() \
bl cache_post_iinvalidate
#define CACHE_POST_MEMSET(val) \
mr r3, r11; \
li r4, val; \
mr r5, r12; \
bl cache_post_memset
#define CACHE_POST_CHECK() \
mr r3, r11; \
mr r4, r12; \
bl cache_post_check; \
mr r13, r3
/*
* Write and read 0xff pattern with caching enabled.
*/
.global cache_post_test1
cache_post_test1:
mflr r9
mr r10, r3 /* tlb */
mr r11, r4 /* p */
mr r12, r5 /* size */
CACHE_POST_WB()
CACHE_POST_DINVALIDATE()
/* Write the negative pattern to the test area */
CACHE_POST_MEMSET(0xff)
/* Read the test area */
CACHE_POST_CHECK()
CACHE_POST_DINVALIDATE()
CACHE_POST_DISABLE()
mr r3, r13
mtlr r9
blr
/*
* Write zeroes with caching enabled.
* Write 0xff pattern with caching disabled.
* Read 0xff pattern with caching enabled.
*/
.global cache_post_test2
cache_post_test2:
mflr r9
mr r10, r3 /* tlb */
mr r11, r4 /* p */
mr r12, r5 /* size */
CACHE_POST_WB()
CACHE_POST_DINVALIDATE()
/* Write the zero pattern to the test area */
CACHE_POST_MEMSET(0)
CACHE_POST_DINVALIDATE()
CACHE_POST_DISABLE()
/* Write the negative pattern to the test area */
CACHE_POST_MEMSET(0xff)
CACHE_POST_WB()
/* Read the test area */
CACHE_POST_CHECK()
CACHE_POST_DINVALIDATE()
CACHE_POST_DISABLE()
mr r3, r13
mtlr r9
blr
/*
* Write-through mode test.
* Write zeroes, store the cache, write 0xff pattern.
* Invalidate the cache.
* Check that 0xff pattern is read.
*/
.global cache_post_test3
cache_post_test3:
mflr r9
mr r10, r3 /* tlb */
mr r11, r4 /* p */
mr r12, r5 /* size */
CACHE_POST_WT()
CACHE_POST_DINVALIDATE()
/* Cache the test area */
CACHE_POST_DTOUCH()
/* Write the zero pattern to the test area */
CACHE_POST_MEMSET(0)
CACHE_POST_DSTORE()
/* Write the negative pattern to the test area */
CACHE_POST_MEMSET(0xff)
CACHE_POST_DINVALIDATE()
CACHE_POST_DISABLE()
/* Read the test area */
CACHE_POST_CHECK()
mr r3, r13
mtlr r9
blr
/*
* Write-back mode test.
* Write 0xff pattern, store the cache, write zeroes.
* Invalidate the cache.
* Check that 0xff pattern is read.
*/
.global cache_post_test4
cache_post_test4:
mflr r9
mr r10, r3 /* tlb */
mr r11, r4 /* p */
mr r12, r5 /* size */
CACHE_POST_WB()
CACHE_POST_DINVALIDATE()
/* Cache the test area */
CACHE_POST_DTOUCH()
/* Write the negative pattern to the test area */
CACHE_POST_MEMSET(0xff)
CACHE_POST_DSTORE()
/* Write the zero pattern to the test area */
CACHE_POST_MEMSET(0)
CACHE_POST_DINVALIDATE()
CACHE_POST_DISABLE()
/* Read the test area */
CACHE_POST_CHECK()
mr r3, r13
mtlr r9
blr
/*
* Load the test instructions into the instruction cache.
* Replace the test instructions.
* Check that the original instructions are executed.
*/
.global cache_post_test5
cache_post_test5:
mflr r9
mr r10, r3 /* tlb */
mr r11, r4 /* p */
mr r12, r5 /* size */
CACHE_POST_WT()
CACHE_POST_IINVALIDATE()
/* Compute r13 = cache_post_test_inst */
bl cache_post_test5_reloc
cache_post_test5_reloc:
mflr r13
lis r0, (cache_post_test_inst - cache_post_test5_reloc)@h
ori r0, r0, (cache_post_test_inst - cache_post_test5_reloc)@l
add r13, r13, r0
/* Copy the test instructions to the test area */
lwz r0, 0(r13)
stw r0, 0(r11)
lwz r0, 8(r13)
stw r0, 4(r11)
sync
/* Invalidate the cache line */
icbi r0, r11
sync
isync
/* Execute the test instructions */
mtlr r11
blrl
/* Replace the test instruction */
lwz r0, 4(r13)
stw r0, 0(r11)
sync
/* Do not invalidate the cache line */
isync
/* Execute the test instructions */
mtlr r11
blrl
mr r13, r3
CACHE_POST_IINVALIDATE()
CACHE_POST_DINVALIDATE()
CACHE_POST_DISABLE()
mr r3, r13
mtlr r9
blr
/*
* Load the test instructions into the instruction cache.
* Replace the test instructions and invalidate the cache.
* Check that the replaced instructions are executed.
*/
.global cache_post_test6
cache_post_test6:
mflr r9
mr r10, r3 /* tlb */
mr r11, r4 /* p */
mr r12, r5 /* size */
CACHE_POST_WT()
CACHE_POST_IINVALIDATE()
/* Compute r13 = cache_post_test_inst */
bl cache_post_test6_reloc
cache_post_test6_reloc:
mflr r13
lis r0, (cache_post_test_inst - cache_post_test6_reloc)@h
ori r0, r0, (cache_post_test_inst - cache_post_test6_reloc)@l
add r13, r13, r0
/* Copy the test instructions to the test area */
lwz r0, 4(r13)
stw r0, 0(r11)
lwz r0, 8(r13)
stw r0, 4(r11)
sync
/* Invalidate the cache line */
icbi r0, r11
sync
isync
/* Execute the test instructions */
mtlr r11
blrl
/* Replace the test instruction */
lwz r0, 0(r13)
stw r0, 0(r11)
sync
/* Invalidate the cache line */
icbi r0, r11
sync
isync
/* Execute the test instructions */
mtlr r11
blrl
mr r13, r3
CACHE_POST_IINVALIDATE()
CACHE_POST_DINVALIDATE()
CACHE_POST_DISABLE()
mr r3, r13
mtlr r9
blr
/* Test instructions.
*/
cache_post_test_inst:
li r3, 0
li r3, -1
blr
#endif /* CONFIG_POST & CFG_POST_CACHE */
#endif /* CONFIG_POST */
|
