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gdb server: new feature, add stop reason in stop reply packet for gdb
[openocd.git] / src / target / armv7a.c
blob80d7a6e8b64592d4a4a0bad8c63c68a280dea0ca
1 /***************************************************************************
2 * Copyright (C) 2009 by David Brownell *
3 * *
4 * Copyright (C) ST-Ericsson SA 2011 michel.jaouen@stericsson.com *
5 * *
6 * This program is free software; you can redistribute it and/or modify *
7 * it under the terms of the GNU General Public License as published by *
8 * the Free Software Foundation; either version 2 of the License, or *
9 * (at your option) any later version. *
10 * *
11 * This program is distributed in the hope that it will be useful, *
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
14 * GNU General Public License for more details. *
15 * *
16 * You should have received a copy of the GNU General Public License *
17 * along with this program; if not, write to the *
18 * Free Software Foundation, Inc., *
19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. *
20 ***************************************************************************/
21
22 #ifdef HAVE_CONFIG_H
23 #include "config.h"
24 #endif
25
26 #include <helper/replacements.h>
27
28 #include "armv7a.h"
29 #include "arm_disassembler.h"
30
31 #include "register.h"
32 #include <helper/binarybuffer.h>
33 #include <helper/command.h>
34
35 #include <stdlib.h>
36 #include <string.h>
37 #include <unistd.h>
38
39 #include "arm_opcodes.h"
40 #include "target.h"
41 #include "target_type.h"
42
43 static void armv7a_show_fault_registers(struct target *target)
44 {
45 uint32_t dfsr, ifsr, dfar, ifar;
46 struct armv7a_common *armv7a = target_to_armv7a(target);
47 struct arm_dpm *dpm = armv7a->arm.dpm;
48 int retval;
49
50 retval = dpm->prepare(dpm);
51 if (retval != ERROR_OK)
52 return;
53
54 /* ARMV4_5_MRC(cpnum, op1, r0, CRn, CRm, op2) */
55
56 /* c5/c0 - {data, instruction} fault status registers */
57 retval = dpm->instr_read_data_r0(dpm,
58 ARMV4_5_MRC(15, 0, 0, 5, 0, 0),
59 &dfsr);
60 if (retval != ERROR_OK)
61 goto done;
62
63 retval = dpm->instr_read_data_r0(dpm,
64 ARMV4_5_MRC(15, 0, 0, 5, 0, 1),
65 &ifsr);
66 if (retval != ERROR_OK)
67 goto done;
68
69 /* c6/c0 - {data, instruction} fault address registers */
70 retval = dpm->instr_read_data_r0(dpm,
71 ARMV4_5_MRC(15, 0, 0, 6, 0, 0),
72 &dfar);
73 if (retval != ERROR_OK)
74 goto done;
75
76 retval = dpm->instr_read_data_r0(dpm,
77 ARMV4_5_MRC(15, 0, 0, 6, 0, 2),
78 &ifar);
79 if (retval != ERROR_OK)
80 goto done;
81
82 LOG_USER("Data fault registers DFSR: %8.8" PRIx32
83 ", DFAR: %8.8" PRIx32, dfsr, dfar);
84 LOG_USER("Instruction fault registers IFSR: %8.8" PRIx32
85 ", IFAR: %8.8" PRIx32, ifsr, ifar);
86
87 done:
88 /* (void) */ dpm->finish(dpm);
89 }
90
91 static int armv7a_read_ttbcr(struct target *target)
92 {
93 struct armv7a_common *armv7a = target_to_armv7a(target);
94 struct arm_dpm *dpm = armv7a->arm.dpm;
95 uint32_t ttbcr;
96 int retval = dpm->prepare(dpm);
97 if (retval != ERROR_OK)
98 goto done;
99 /* MRC p15,0,<Rt>,c2,c0,2 ; Read CP15 Translation Table Base Control Register*/
100 retval = dpm->instr_read_data_r0(dpm,
101 ARMV4_5_MRC(15, 0, 0, 2, 0, 2),
102 &ttbcr);
103 if (retval != ERROR_OK)
104 goto done;
105 armv7a->armv7a_mmu.ttbr1_used = ((ttbcr & 0x7) != 0) ? 1 : 0;
106 armv7a->armv7a_mmu.ttbr0_mask = 7 << (32 - ((ttbcr & 0x7)));
107 #if 0
108 LOG_INFO("ttb1 %s ,ttb0_mask %x",
109 armv7a->armv7a_mmu.ttbr1_used ? "used" : "not used",
110 armv7a->armv7a_mmu.ttbr0_mask);
111 #endif
112 if (armv7a->armv7a_mmu.ttbr1_used == 1) {
113 LOG_INFO("SVC access above %x",
114 (0xffffffff & armv7a->armv7a_mmu.ttbr0_mask));
115 armv7a->armv7a_mmu.os_border = 0xffffffff & armv7a->armv7a_mmu.ttbr0_mask;
116 } else {
117 /* fix me , default is hard coded LINUX border */
118 armv7a->armv7a_mmu.os_border = 0xc0000000;
119 }
120 done:
121 dpm->finish(dpm);
122 return retval;
123 }
124
125
126 /* method adapted to cortex A : reused arm v4 v5 method*/
127 int armv7a_mmu_translate_va(struct target *target, uint32_t va, uint32_t *val)
128 {
129 uint32_t first_lvl_descriptor = 0x0;
130 uint32_t second_lvl_descriptor = 0x0;
131 int retval;
132 struct armv7a_common *armv7a = target_to_armv7a(target);
133 struct arm_dpm *dpm = armv7a->arm.dpm;
134 uint32_t ttb = 0; /* default ttb0 */
135 if (armv7a->armv7a_mmu.ttbr1_used == -1)
136 armv7a_read_ttbcr(target);
137 if ((armv7a->armv7a_mmu.ttbr1_used) &&
138 (va > (0xffffffff & armv7a->armv7a_mmu.ttbr0_mask))) {
139 /* select ttb 1 */
140 ttb = 1;
141 }
142 retval = dpm->prepare(dpm);
143 if (retval != ERROR_OK)
144 goto done;
145
146 /* MRC p15,0,<Rt>,c2,c0,ttb */
147 retval = dpm->instr_read_data_r0(dpm,
148 ARMV4_5_MRC(15, 0, 0, 2, 0, ttb),
149 &ttb);
150 if (retval != ERROR_OK)
151 return retval;
152 retval = armv7a->armv7a_mmu.read_physical_memory(target,
153 (ttb & 0xffffc000) | ((va & 0xfff00000) >> 18),
154 4, 1, (uint8_t *)&first_lvl_descriptor);
155 if (retval != ERROR_OK)
156 return retval;
157 first_lvl_descriptor = target_buffer_get_u32(target, (uint8_t *)
158 &first_lvl_descriptor);
159 /* reuse armv4_5 piece of code, specific armv7a changes may come later */
160 LOG_DEBUG("1st lvl desc: %8.8" PRIx32 "", first_lvl_descriptor);
161
162 if ((first_lvl_descriptor & 0x3) == 0) {
163 LOG_ERROR("Address translation failure");
164 return ERROR_TARGET_TRANSLATION_FAULT;
165 }
166
167
168 if ((first_lvl_descriptor & 0x3) == 2) {
169 /* section descriptor */
170 *val = (first_lvl_descriptor & 0xfff00000) | (va & 0x000fffff);
171 return ERROR_OK;
172 }
173
174 if ((first_lvl_descriptor & 0x3) == 1) {
175 /* coarse page table */
176 retval = armv7a->armv7a_mmu.read_physical_memory(target,
177 (first_lvl_descriptor & 0xfffffc00) | ((va & 0x000ff000) >> 10),
178 4, 1, (uint8_t *)&second_lvl_descriptor);
179 if (retval != ERROR_OK)
180 return retval;
181 } else if ((first_lvl_descriptor & 0x3) == 3) {
182 /* fine page table */
183 retval = armv7a->armv7a_mmu.read_physical_memory(target,
184 (first_lvl_descriptor & 0xfffff000) | ((va & 0x000ffc00) >> 8),
185 4, 1, (uint8_t *)&second_lvl_descriptor);
186 if (retval != ERROR_OK)
187 return retval;
188 }
189
190 second_lvl_descriptor = target_buffer_get_u32(target, (uint8_t *)
191 &second_lvl_descriptor);
192
193 LOG_DEBUG("2nd lvl desc: %8.8" PRIx32 "", second_lvl_descriptor);
194
195 if ((second_lvl_descriptor & 0x3) == 0) {
196 LOG_ERROR("Address translation failure");
197 return ERROR_TARGET_TRANSLATION_FAULT;
198 }
199
200 if ((second_lvl_descriptor & 0x3) == 1) {
201 /* large page descriptor */
202 *val = (second_lvl_descriptor & 0xffff0000) | (va & 0x0000ffff);
203 return ERROR_OK;
204 }
205
206 if ((second_lvl_descriptor & 0x3) == 2) {
207 /* small page descriptor */
208 *val = (second_lvl_descriptor & 0xfffff000) | (va & 0x00000fff);
209 return ERROR_OK;
210 }
211
212 if ((second_lvl_descriptor & 0x3) == 3) {
213 *val = (second_lvl_descriptor & 0xfffffc00) | (va & 0x000003ff);
214 return ERROR_OK;
215 }
216
217 /* should not happen */
218 LOG_ERROR("Address translation failure");
219 return ERROR_TARGET_TRANSLATION_FAULT;
220
221 done:
222 return retval;
223 }
224
225 /* V7 method VA TO PA */
226 int armv7a_mmu_translate_va_pa(struct target *target, uint32_t va,
227 uint32_t *val, int meminfo)
228 {
229 int retval = ERROR_FAIL;
230 struct armv7a_common *armv7a = target_to_armv7a(target);
231 struct arm_dpm *dpm = armv7a->arm.dpm;
232 uint32_t virt = va & ~0xfff;
233 uint32_t NOS, NS, INNER, OUTER;
234 *val = 0xdeadbeef;
235 retval = dpm->prepare(dpm);
236 if (retval != ERROR_OK)
237 goto done;
238 /* mmu must be enable in order to get a correct translation
239 * use VA to PA CP15 register for conversion */
240 retval = dpm->instr_write_data_r0(dpm,
241 ARMV4_5_MCR(15, 0, 0, 7, 8, 0),
242 virt);
243 if (retval != ERROR_OK)
244 goto done;
245 retval = dpm->instr_read_data_r0(dpm,
246 ARMV4_5_MRC(15, 0, 0, 7, 4, 0),
247 val);
248 /* decode memory attribute */
249 NOS = (*val >> 10) & 1; /* Not Outer shareable */
250 NS = (*val >> 9) & 1; /* Non secure */
251 INNER = (*val >> 4) & 0x7;
252 OUTER = (*val >> 2) & 0x3;
253
254 if (retval != ERROR_OK)
255 goto done;
256 *val = (*val & ~0xfff) + (va & 0xfff);
257 if (*val == va)
258 LOG_WARNING("virt = phys : MMU disable !!");
259 if (meminfo) {
260 LOG_INFO("%x : %x %s outer shareable %s secured",
261 va, *val,
262 NOS == 1 ? "not" : " ",
263 NS == 1 ? "not" : "");
264 switch (OUTER) {
265 case 0:
266 LOG_INFO("outer: Non-Cacheable");
267 break;
268 case 1:
269 LOG_INFO("outer: Write-Back, Write-Allocate");
270 break;
271 case 2:
272 LOG_INFO("outer: Write-Through, No Write-Allocate");
273 break;
274 case 3:
275 LOG_INFO("outer: Write-Back, no Write-Allocate");
276 break;
277 }
278 switch (INNER) {
279 case 0:
280 LOG_INFO("inner: Non-Cacheable");
281 break;
282 case 1:
283 LOG_INFO("inner: Strongly-ordered");
284 break;
285 case 3:
286 LOG_INFO("inner: Device");
287 break;
288 case 5:
289 LOG_INFO("inner: Write-Back, Write-Allocate");
290 break;
291 case 6:
292 LOG_INFO("inner: Write-Through");
293 break;
294 case 7:
295 LOG_INFO("inner: Write-Back, no Write-Allocate");
296
297 default:
298 LOG_INFO("inner: %x ???", INNER);
299 }
300 }
301
302 done:
303 dpm->finish(dpm);
304
305 return retval;
306 }
307
308 static int armv7a_handle_inner_cache_info_command(struct command_context *cmd_ctx,
309 struct armv7a_cache_common *armv7a_cache)
310 {
311 if (armv7a_cache->ctype == -1) {
312 command_print(cmd_ctx, "cache not yet identified");
313 return ERROR_OK;
314 }
315
316 command_print(cmd_ctx,
317 "D-Cache: linelen %i, associativity %i, nsets %i, cachesize %d KBytes",
318 armv7a_cache->d_u_size.linelen,
319 armv7a_cache->d_u_size.associativity,
320 armv7a_cache->d_u_size.nsets,
321 armv7a_cache->d_u_size.cachesize);
322
323 command_print(cmd_ctx,
324 "I-Cache: linelen %i, associativity %i, nsets %i, cachesize %d KBytes",
325 armv7a_cache->i_size.linelen,
326 armv7a_cache->i_size.associativity,
327 armv7a_cache->i_size.nsets,
328 armv7a_cache->i_size.cachesize);
329
330 return ERROR_OK;
331 }
332
333 static int _armv7a_flush_all_data(struct target *target)
334 {
335 struct armv7a_common *armv7a = target_to_armv7a(target);
336 struct arm_dpm *dpm = armv7a->arm.dpm;
337 struct armv7a_cachesize *d_u_size =
338 &(armv7a->armv7a_mmu.armv7a_cache.d_u_size);
339 int32_t c_way, c_index = d_u_size->index;
340 int retval;
341 /* check that cache data is on at target halt */
342 if (!armv7a->armv7a_mmu.armv7a_cache.d_u_cache_enabled) {
343 LOG_INFO("flushed not performed :cache not on at target halt");
344 return ERROR_OK;
345 }
346 retval = dpm->prepare(dpm);
347 if (retval != ERROR_OK)
348 goto done;
349 do {
350 c_way = d_u_size->way;
351 do {
352 uint32_t value = (c_index << d_u_size->index_shift)
353 | (c_way << d_u_size->way_shift);
354 /* DCCISW */
355 /* LOG_INFO ("%d %d %x",c_way,c_index,value); */
356 retval = dpm->instr_write_data_r0(dpm,
357 ARMV4_5_MCR(15, 0, 0, 7, 14, 2),
358 value);
359 if (retval != ERROR_OK)
360 goto done;
361 c_way -= 1;
362 } while (c_way >= 0);
363 c_index -= 1;
364 } while (c_index >= 0);
365 return retval;
366 done:
367 LOG_ERROR("flushed failed");
368 dpm->finish(dpm);
369 return retval;
370 }
371
372 static int armv7a_flush_all_data(struct target *target)
373 {
374 int retval = ERROR_FAIL;
375 /* check that armv7a_cache is correctly identify */
376 struct armv7a_common *armv7a = target_to_armv7a(target);
377 if (armv7a->armv7a_mmu.armv7a_cache.ctype == -1) {
378 LOG_ERROR("trying to flush un-identified cache");
379 return retval;
380 }
381
382 if (target->smp) {
383 /* look if all the other target have been flushed in order to flush level
384 * 2 */
385 struct target_list *head;
386 struct target *curr;
387 head = target->head;
388 while (head != (struct target_list *)NULL) {
389 curr = head->target;
390 if (curr->state == TARGET_HALTED) {
391 LOG_INFO("Wait flushing data l1 on core %d", curr->coreid);
392 retval = _armv7a_flush_all_data(curr);
393 }
394 head = head->next;
395 }
396 } else
397 retval = _armv7a_flush_all_data(target);
398 return retval;
399 }
400
401 /* L2 is not specific to armv7a a specific file is needed */
402 static int armv7a_l2x_flush_all_data(struct target *target)
403 {
404
405 #define L2X0_CLEAN_INV_WAY 0x7FC
406 int retval = ERROR_FAIL;
407 struct armv7a_common *armv7a = target_to_armv7a(target);
408 struct armv7a_l2x_cache *l2x_cache = (struct armv7a_l2x_cache *)
409 (armv7a->armv7a_mmu.armv7a_cache.l2_cache);
410 uint32_t base = l2x_cache->base;
411 uint32_t l2_way = l2x_cache->way;
412 uint32_t l2_way_val = (1 << l2_way) - 1;
413 retval = armv7a_flush_all_data(target);
414 if (retval != ERROR_OK)
415 return retval;
416 retval = target->type->write_phys_memory(target,
417 (uint32_t)(base+(uint32_t)L2X0_CLEAN_INV_WAY),
418 (uint32_t)4,
419 (uint32_t)1,
420 (uint8_t *)&l2_way_val);
421 return retval;
422 }
423
424 static int armv7a_handle_l2x_cache_info_command(struct command_context *cmd_ctx,
425 struct armv7a_cache_common *armv7a_cache)
426 {
427
428 struct armv7a_l2x_cache *l2x_cache = (struct armv7a_l2x_cache *)
429 (armv7a_cache->l2_cache);
430
431 if (armv7a_cache->ctype == -1) {
432 command_print(cmd_ctx, "cache not yet identified");
433 return ERROR_OK;
434 }
435
436 command_print(cmd_ctx,
437 "L1 D-Cache: linelen %i, associativity %i, nsets %i, cachesize %d KBytes",
438 armv7a_cache->d_u_size.linelen,
439 armv7a_cache->d_u_size.associativity,
440 armv7a_cache->d_u_size.nsets,
441 armv7a_cache->d_u_size.cachesize);
442
443 command_print(cmd_ctx,
444 "L1 I-Cache: linelen %i, associativity %i, nsets %i, cachesize %d KBytes",
445 armv7a_cache->i_size.linelen,
446 armv7a_cache->i_size.associativity,
447 armv7a_cache->i_size.nsets,
448 armv7a_cache->i_size.cachesize);
449 command_print(cmd_ctx, "L2 unified cache Base Address 0x%x, %d ways",
450 l2x_cache->base, l2x_cache->way);
451
452
453 return ERROR_OK;
454 }
455
456
457 static int armv7a_l2x_cache_init(struct target *target, uint32_t base, uint32_t way)
458 {
459 struct armv7a_l2x_cache *l2x_cache;
460 struct target_list *head = target->head;
461 struct target *curr;
462
463 struct armv7a_common *armv7a = target_to_armv7a(target);
464 l2x_cache = calloc(1, sizeof(struct armv7a_l2x_cache));
465 l2x_cache->base = base;
466 l2x_cache->way = way;
467 /*LOG_INFO("cache l2 initialized base %x way %d",
468 l2x_cache->base,l2x_cache->way);*/
469 if (armv7a->armv7a_mmu.armv7a_cache.l2_cache)
470 LOG_INFO("cache l2 already initialized\n");
471 armv7a->armv7a_mmu.armv7a_cache.l2_cache = (void *) l2x_cache;
472 /* initialize l1 / l2x cache function */
473 armv7a->armv7a_mmu.armv7a_cache.flush_all_data_cache
474 = armv7a_l2x_flush_all_data;
475 armv7a->armv7a_mmu.armv7a_cache.display_cache_info =
476 armv7a_handle_l2x_cache_info_command;
477 /* initialize all target in this cluster (smp target)
478 * l2 cache must be configured after smp declaration */
479 while (head != (struct target_list *)NULL) {
480 curr = head->target;
481 if (curr != target) {
482 armv7a = target_to_armv7a(curr);
483 if (armv7a->armv7a_mmu.armv7a_cache.l2_cache)
484 LOG_ERROR("smp target : cache l2 already initialized\n");
485 armv7a->armv7a_mmu.armv7a_cache.l2_cache = (void *) l2x_cache;
486 armv7a->armv7a_mmu.armv7a_cache.flush_all_data_cache =
487 armv7a_l2x_flush_all_data;
488 armv7a->armv7a_mmu.armv7a_cache.display_cache_info =
489 armv7a_handle_l2x_cache_info_command;
490 }
491 head = head->next;
492 }
493 return JIM_OK;
494 }
495
496 COMMAND_HANDLER(handle_cache_l2x)
497 {
498 struct target *target = get_current_target(CMD_CTX);
499 uint32_t base, way;
500 switch (CMD_ARGC) {
501 case 0:
502 return ERROR_COMMAND_SYNTAX_ERROR;
503 break;
504 case 2:
505 /* command_print(CMD_CTX, "%s %s", CMD_ARGV[0], CMD_ARGV[1]); */
506 COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], base);
507 COMMAND_PARSE_NUMBER(u32, CMD_ARGV[1], way);
508
509 /* AP address is in bits 31:24 of DP_SELECT */
510 armv7a_l2x_cache_init(target, base, way);
511 break;
512 default:
513 return ERROR_COMMAND_SYNTAX_ERROR;
514 }
515 return ERROR_OK;
516 }
517
518 int armv7a_handle_cache_info_command(struct command_context *cmd_ctx,
519 struct armv7a_cache_common *armv7a_cache)
520 {
521 if (armv7a_cache->ctype == -1) {
522 command_print(cmd_ctx, "cache not yet identified");
523 return ERROR_OK;
524 }
525
526 if (armv7a_cache->display_cache_info)
527 armv7a_cache->display_cache_info(cmd_ctx, armv7a_cache);
528 return ERROR_OK;
529 }
530
531 /* retrieve core id cluster id */
532 static int armv7a_read_mpidr(struct target *target)
533 {
534 int retval = ERROR_FAIL;
535 struct armv7a_common *armv7a = target_to_armv7a(target);
536 struct arm_dpm *dpm = armv7a->arm.dpm;
537 uint32_t mpidr;
538 retval = dpm->prepare(dpm);
539 if (retval != ERROR_OK)
540 goto done;
541 /* MRC p15,0,<Rd>,c0,c0,5; read Multiprocessor ID register*/
542
543 retval = dpm->instr_read_data_r0(dpm,
544 ARMV4_5_MRC(15, 0, 0, 0, 0, 5),
545 &mpidr);
546 if (retval != ERROR_OK)
547 goto done;
548 if (mpidr & 1<<31) {
549 armv7a->multi_processor_system = (mpidr >> 30) & 1;
550 armv7a->cluster_id = (mpidr >> 8) & 0xf;
551 armv7a->cpu_id = mpidr & 0x3;
552 LOG_INFO("%s cluster %x core %x %s", target_name(target),
553 armv7a->cluster_id,
554 armv7a->cpu_id,
555 armv7a->multi_processor_system == 0 ? "multi core" : "mono core");
556
557 } else
558 LOG_ERROR("mpdir not in multiprocessor format");
559
560 done:
561 dpm->finish(dpm);
562 return retval;
563
564
565 }
566
567 int armv7a_identify_cache(struct target *target)
568 {
569 /* read cache descriptor */
570 int retval = ERROR_FAIL;
571 struct armv7a_common *armv7a = target_to_armv7a(target);
572 struct arm_dpm *dpm = armv7a->arm.dpm;
573 uint32_t cache_selected, clidr;
574 uint32_t cache_i_reg, cache_d_reg;
575 struct armv7a_cache_common *cache = &(armv7a->armv7a_mmu.armv7a_cache);
576 if (!armv7a->is_armv7r)
577 armv7a_read_ttbcr(target);
578 retval = dpm->prepare(dpm);
579
580 if (retval != ERROR_OK)
581 goto done;
582 /* retrieve CLIDR
583 * mrc p15, 1, r0, c0, c0, 1 @ read clidr */
584 retval = dpm->instr_read_data_r0(dpm,
585 ARMV4_5_MRC(15, 1, 0, 0, 0, 1),
586 &clidr);
587 if (retval != ERROR_OK)
588 goto done;
589 clidr = (clidr & 0x7000000) >> 23;
590 LOG_INFO("number of cache level %d", clidr / 2);
591 if ((clidr / 2) > 1) {
592 /* FIXME not supported present in cortex A8 and later */
593 /* in cortex A7, A15 */
594 LOG_ERROR("cache l2 present :not supported");
595 }
596 /* retrieve selected cache
597 * MRC p15, 2,<Rd>, c0, c0, 0; Read CSSELR */
598 retval = dpm->instr_read_data_r0(dpm,
599 ARMV4_5_MRC(15, 2, 0, 0, 0, 0),
600 &cache_selected);
601 if (retval != ERROR_OK)
602 goto done;
603
604 retval = armv7a->arm.mrc(target, 15,
605 2, 0, /* op1, op2 */
606 0, 0, /* CRn, CRm */
607 &cache_selected);
608 if (retval != ERROR_OK)
609 goto done;
610 /* select instruction cache
611 * MCR p15, 2,<Rd>, c0, c0, 0; Write CSSELR
612 * [0] : 1 instruction cache selection , 0 data cache selection */
613 retval = dpm->instr_write_data_r0(dpm,
614 ARMV4_5_MRC(15, 2, 0, 0, 0, 0),
615 1);
616 if (retval != ERROR_OK)
617 goto done;
618
619 /* read CCSIDR
620 * MRC P15,1,<RT>,C0, C0,0 ;on cortex A9 read CCSIDR
621 * [2:0] line size 001 eight word per line
622 * [27:13] NumSet 0x7f 16KB, 0xff 32Kbytes, 0x1ff 64Kbytes */
623 retval = dpm->instr_read_data_r0(dpm,
624 ARMV4_5_MRC(15, 1, 0, 0, 0, 0),
625 &cache_i_reg);
626 if (retval != ERROR_OK)
627 goto done;
628
629 /* select data cache*/
630 retval = dpm->instr_write_data_r0(dpm,
631 ARMV4_5_MRC(15, 2, 0, 0, 0, 0),
632 0);
633 if (retval != ERROR_OK)
634 goto done;
635
636 retval = dpm->instr_read_data_r0(dpm,
637 ARMV4_5_MRC(15, 1, 0, 0, 0, 0),
638 &cache_d_reg);
639 if (retval != ERROR_OK)
640 goto done;
641
642 /* restore selected cache */
643 dpm->instr_write_data_r0(dpm,
644 ARMV4_5_MRC(15, 2, 0, 0, 0, 0),
645 cache_selected);
646
647 if (retval != ERROR_OK)
648 goto done;
649 dpm->finish(dpm);
650
651 /* put fake type */
652 cache->d_u_size.linelen = 16 << (cache_d_reg & 0x7);
653 cache->d_u_size.cachesize = (((cache_d_reg >> 13) & 0x7fff)+1)/8;
654 cache->d_u_size.nsets = (cache_d_reg >> 13) & 0x7fff;
655 cache->d_u_size.associativity = ((cache_d_reg >> 3) & 0x3ff) + 1;
656 /* compute info for set way operation on cache */
657 cache->d_u_size.index_shift = (cache_d_reg & 0x7) + 4;
658 cache->d_u_size.index = (cache_d_reg >> 13) & 0x7fff;
659 cache->d_u_size.way = ((cache_d_reg >> 3) & 0x3ff);
660 cache->d_u_size.way_shift = cache->d_u_size.way + 1;
661 {
662 int i = 0;
663 while (((cache->d_u_size.way_shift >> i) & 1) != 1)
664 i++;
665 cache->d_u_size.way_shift = 32-i;
666 }
667 #if 0
668 LOG_INFO("data cache index %d << %d, way %d << %d",
669 cache->d_u_size.index, cache->d_u_size.index_shift,
670 cache->d_u_size.way,
671 cache->d_u_size.way_shift);
672
673 LOG_INFO("data cache %d bytes %d KBytes asso %d ways",
674 cache->d_u_size.linelen,
675 cache->d_u_size.cachesize,
676 cache->d_u_size.associativity);
677 #endif
678 cache->i_size.linelen = 16 << (cache_i_reg & 0x7);
679 cache->i_size.associativity = ((cache_i_reg >> 3) & 0x3ff) + 1;
680 cache->i_size.nsets = (cache_i_reg >> 13) & 0x7fff;
681 cache->i_size.cachesize = (((cache_i_reg >> 13) & 0x7fff)+1)/8;
682 /* compute info for set way operation on cache */
683 cache->i_size.index_shift = (cache_i_reg & 0x7) + 4;
684 cache->i_size.index = (cache_i_reg >> 13) & 0x7fff;
685 cache->i_size.way = ((cache_i_reg >> 3) & 0x3ff);
686 cache->i_size.way_shift = cache->i_size.way + 1;
687 {
688 int i = 0;
689 while (((cache->i_size.way_shift >> i) & 1) != 1)
690 i++;
691 cache->i_size.way_shift = 32-i;
692 }
693 #if 0
694 LOG_INFO("instruction cache index %d << %d, way %d << %d",
695 cache->i_size.index, cache->i_size.index_shift,
696 cache->i_size.way, cache->i_size.way_shift);
697
698 LOG_INFO("instruction cache %d bytes %d KBytes asso %d ways",
699 cache->i_size.linelen,
700 cache->i_size.cachesize,
701 cache->i_size.associativity);
702 #endif
703 /* if no l2 cache initialize l1 data cache flush function function */
704 if (armv7a->armv7a_mmu.armv7a_cache.flush_all_data_cache == NULL) {
705 armv7a->armv7a_mmu.armv7a_cache.display_cache_info =
706 armv7a_handle_inner_cache_info_command;
707 armv7a->armv7a_mmu.armv7a_cache.flush_all_data_cache =
708 armv7a_flush_all_data;
709 }
710 armv7a->armv7a_mmu.armv7a_cache.ctype = 0;
711
712 done:
713 dpm->finish(dpm);
714 armv7a_read_mpidr(target);
715 return retval;
716
717 }
718
719 int armv7a_init_arch_info(struct target *target, struct armv7a_common *armv7a)
720 {
721 struct arm *arm = &armv7a->arm;
722 arm->arch_info = armv7a;
723 target->arch_info = &armv7a->arm;
724 /* target is useful in all function arm v4 5 compatible */
725 armv7a->arm.target = target;
726 armv7a->arm.common_magic = ARM_COMMON_MAGIC;
727 armv7a->common_magic = ARMV7_COMMON_MAGIC;
728 armv7a->armv7a_mmu.armv7a_cache.l2_cache = NULL;
729 armv7a->armv7a_mmu.armv7a_cache.ctype = -1;
730 armv7a->armv7a_mmu.armv7a_cache.flush_all_data_cache = NULL;
731 armv7a->armv7a_mmu.armv7a_cache.display_cache_info = NULL;
732 return ERROR_OK;
733 }
734
735 int armv7a_arch_state(struct target *target)
736 {
737 static const char *state[] = {
738 "disabled", "enabled"
739 };
740
741 struct armv7a_common *armv7a = target_to_armv7a(target);
742 struct arm *arm = &armv7a->arm;
743
744 if (armv7a->common_magic != ARMV7_COMMON_MAGIC) {
745 LOG_ERROR("BUG: called for a non-ARMv7A target");
746 return ERROR_COMMAND_SYNTAX_ERROR;
747 }
748
749 arm_arch_state(target);
750
751 if (armv7a->is_armv7r) {
752 LOG_USER("D-Cache: %s, I-Cache: %s",
753 state[armv7a->armv7a_mmu.armv7a_cache.d_u_cache_enabled],
754 state[armv7a->armv7a_mmu.armv7a_cache.i_cache_enabled]);
755 } else {
756 LOG_USER("MMU: %s, D-Cache: %s, I-Cache: %s",
757 state[armv7a->armv7a_mmu.mmu_enabled],
758 state[armv7a->armv7a_mmu.armv7a_cache.d_u_cache_enabled],
759 state[armv7a->armv7a_mmu.armv7a_cache.i_cache_enabled]);
760 }
761
762 if (arm->core_mode == ARM_MODE_ABT)
763 armv7a_show_fault_registers(target);
764 if (target->debug_reason == DBG_REASON_WATCHPOINT)
765 LOG_USER("Watchpoint triggered at PC %#08x",
766 (unsigned) armv7a->dpm.wp_pc);
767
768 return ERROR_OK;
769 }
770
771 static const struct command_registration l2_cache_commands[] = {
772 {
773 .name = "l2x",
774 .handler = handle_cache_l2x,
775 .mode = COMMAND_EXEC,
776 .help = "configure l2x cache "
777 "",
778 .usage = "[base_addr] [number_of_way]",
779 },
780 COMMAND_REGISTRATION_DONE
781
782 };
783
784 const struct command_registration l2x_cache_command_handlers[] = {
785 {
786 .name = "cache_config",
787 .mode = COMMAND_EXEC,
788 .help = "cache configuation for a target",
789 .usage = "",
790 .chain = l2_cache_commands,
791 },
792 COMMAND_REGISTRATION_DONE
793 };
794
795
796 const struct command_registration armv7a_command_handlers[] = {
797 {
798 .chain = dap_command_handlers,
799 },
800 {
801 .chain = l2x_cache_command_handlers,
802 },
803 COMMAND_REGISTRATION_DONE
804 };
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