armv7a: fix handling of inner caches
[fw/openocd] / src / target / armv7a.c
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
92 /*  retrieve main id register  */
93 static int armv7a_read_midr(struct target *target)
94 {
95         int retval = ERROR_FAIL;
96         struct armv7a_common *armv7a = target_to_armv7a(target);
97         struct arm_dpm *dpm = armv7a->arm.dpm;
98         uint32_t midr;
99         retval = dpm->prepare(dpm);
100         if (retval != ERROR_OK)
101                 goto done;
102         /* MRC p15,0,<Rd>,c0,c0,0; read main id register*/
103
104         retval = dpm->instr_read_data_r0(dpm,
105                         ARMV4_5_MRC(15, 0, 0, 0, 0, 0),
106                         &midr);
107         if (retval != ERROR_OK)
108                 goto done;
109
110         armv7a->rev = (midr & 0xf);
111         armv7a->partnum = (midr >> 4) & 0xfff;
112         armv7a->arch = (midr >> 16) & 0xf;
113         armv7a->variant = (midr >> 20) & 0xf;
114         armv7a->implementor = (midr >> 24) & 0xff;
115         LOG_INFO("%s rev %" PRIx32 ", partnum %" PRIx32 ", arch %" PRIx32
116                          ", variant %" PRIx32 ", implementor %" PRIx32,
117                  target->cmd_name,
118                  armv7a->rev,
119                  armv7a->partnum,
120                  armv7a->arch,
121                  armv7a->variant,
122                  armv7a->implementor);
123
124 done:
125         dpm->finish(dpm);
126         return retval;
127 }
128
129 static int armv7a_read_ttbcr(struct target *target)
130 {
131         struct armv7a_common *armv7a = target_to_armv7a(target);
132         struct arm_dpm *dpm = armv7a->arm.dpm;
133         uint32_t ttbcr, ttbcr_n;
134         int retval = dpm->prepare(dpm);
135         if (retval != ERROR_OK)
136                 goto done;
137         /*  MRC p15,0,<Rt>,c2,c0,2 ; Read CP15 Translation Table Base Control Register*/
138         retval = dpm->instr_read_data_r0(dpm,
139                         ARMV4_5_MRC(15, 0, 0, 2, 0, 2),
140                         &ttbcr);
141         if (retval != ERROR_OK)
142                 goto done;
143
144         LOG_DEBUG("ttbcr %" PRIx32, ttbcr);
145
146         ttbcr_n = ttbcr & 0x7;
147         armv7a->armv7a_mmu.ttbcr = ttbcr;
148         armv7a->armv7a_mmu.cached = 1;
149
150         /*
151          * ARM Architecture Reference Manual (ARMv7-A and ARMv7-Redition),
152          * document # ARM DDI 0406C
153          */
154         armv7a->armv7a_mmu.ttbr_range[0]  = 0xffffffff >> ttbcr_n;
155         armv7a->armv7a_mmu.ttbr_range[1] = 0xffffffff;
156         armv7a->armv7a_mmu.ttbr_mask[0] = 0xffffffff << (14 - ttbcr_n);
157         armv7a->armv7a_mmu.ttbr_mask[1] = 0xffffffff << 14;
158         armv7a->armv7a_mmu.cached = 1;
159
160         retval = armv7a_read_midr(target);
161         if (retval != ERROR_OK)
162                 goto done;
163
164         /* FIXME: why this special case based on part number? */
165         if ((armv7a->partnum & 0xf) == 0) {
166                 /*  ARM DDI 0344H , ARM DDI 0407F */
167                 armv7a->armv7a_mmu.ttbr_mask[0]  = 7 << (32 - ttbcr_n);
168         }
169
170         LOG_DEBUG("ttbr1 %s, ttbr0_mask %" PRIx32 " ttbr1_mask %" PRIx32,
171                   (ttbcr_n != 0) ? "used" : "not used",
172                   armv7a->armv7a_mmu.ttbr_mask[0],
173                   armv7a->armv7a_mmu.ttbr_mask[1]);
174
175         /* FIXME: default is hard coded LINUX border  */
176         armv7a->armv7a_mmu.os_border = 0xc0000000;
177         if (ttbcr_n != 0) {
178                 LOG_INFO("SVC access above %" PRIx32,
179                         armv7a->armv7a_mmu.ttbr_range[0] + 1);
180                 armv7a->armv7a_mmu.os_border = armv7a->armv7a_mmu.ttbr_range[0] + 1;
181         }
182 done:
183         dpm->finish(dpm);
184         return retval;
185 }
186
187 /*  method adapted to cortex A : reused arm v4 v5 method*/
188 int armv7a_mmu_translate_va(struct target *target,  uint32_t va, uint32_t *val)
189 {
190         uint32_t first_lvl_descriptor = 0x0;
191         uint32_t second_lvl_descriptor = 0x0;
192         int retval;
193         struct armv7a_common *armv7a = target_to_armv7a(target);
194         struct arm_dpm *dpm = armv7a->arm.dpm;
195         uint32_t ttbidx = 0;    /*  default to ttbr0 */
196         uint32_t ttb_mask;
197         uint32_t va_mask;
198         uint32_t ttbcr;
199         uint32_t ttb;
200
201         retval = dpm->prepare(dpm);
202         if (retval != ERROR_OK)
203                 goto done;
204
205         /*  MRC p15,0,<Rt>,c2,c0,2 ; Read CP15 Translation Table Base Control Register*/
206         retval = dpm->instr_read_data_r0(dpm,
207                         ARMV4_5_MRC(15, 0, 0, 2, 0, 2),
208                         &ttbcr);
209         if (retval != ERROR_OK)
210                 goto done;
211
212         /* if ttbcr has changed or was not read before, re-read the information */
213         if ((armv7a->armv7a_mmu.cached == 0) ||
214                 (armv7a->armv7a_mmu.ttbcr != ttbcr)) {
215                 armv7a_read_ttbcr(target);
216         }
217
218         /* if va is above the range handled by ttbr0, select ttbr1 */
219         if (va > armv7a->armv7a_mmu.ttbr_range[0]) {
220                 /*  select ttb 1 */
221                 ttbidx = 1;
222         }
223         /*  MRC p15,0,<Rt>,c2,c0,ttbidx */
224         retval = dpm->instr_read_data_r0(dpm,
225                         ARMV4_5_MRC(15, 0, 0, 2, 0, ttbidx),
226                         &ttb);
227         if (retval != ERROR_OK)
228                 return retval;
229
230         ttb_mask = armv7a->armv7a_mmu.ttbr_mask[ttbidx];
231         va_mask = 0xfff00000 & armv7a->armv7a_mmu.ttbr_range[ttbidx];
232
233         LOG_DEBUG("ttb_mask %" PRIx32 " va_mask %" PRIx32 " ttbidx %i",
234                   ttb_mask, va_mask, ttbidx);
235         retval = armv7a->armv7a_mmu.read_physical_memory(target,
236                         (ttb & ttb_mask) | ((va & va_mask) >> 18),
237                         4, 1, (uint8_t *)&first_lvl_descriptor);
238         if (retval != ERROR_OK)
239                 return retval;
240         first_lvl_descriptor = target_buffer_get_u32(target, (uint8_t *)
241                         &first_lvl_descriptor);
242         /*  reuse armv4_5 piece of code, specific armv7a changes may come later */
243         LOG_DEBUG("1st lvl desc: %8.8" PRIx32 "", first_lvl_descriptor);
244
245         if ((first_lvl_descriptor & 0x3) == 0) {
246                 LOG_ERROR("Address translation failure");
247                 return ERROR_TARGET_TRANSLATION_FAULT;
248         }
249
250
251         if ((first_lvl_descriptor & 0x40002) == 2) {
252                 /* section descriptor */
253                 *val = (first_lvl_descriptor & 0xfff00000) | (va & 0x000fffff);
254                 return ERROR_OK;
255         } else if ((first_lvl_descriptor & 0x40002) == 0x40002) {
256                 /* supersection descriptor */
257                 if (first_lvl_descriptor & 0x00f001e0) {
258                         LOG_ERROR("Physical address does not fit into 32 bits");
259                         return ERROR_TARGET_TRANSLATION_FAULT;
260                 }
261                 *val = (first_lvl_descriptor & 0xff000000) | (va & 0x00ffffff);
262                 return ERROR_OK;
263         }
264
265         /* page table */
266         retval = armv7a->armv7a_mmu.read_physical_memory(target,
267                         (first_lvl_descriptor & 0xfffffc00) | ((va & 0x000ff000) >> 10),
268                         4, 1, (uint8_t *)&second_lvl_descriptor);
269         if (retval != ERROR_OK)
270                 return retval;
271
272         second_lvl_descriptor = target_buffer_get_u32(target, (uint8_t *)
273                         &second_lvl_descriptor);
274
275         LOG_DEBUG("2nd lvl desc: %8.8" PRIx32 "", second_lvl_descriptor);
276
277         if ((second_lvl_descriptor & 0x3) == 0) {
278                 LOG_ERROR("Address translation failure");
279                 return ERROR_TARGET_TRANSLATION_FAULT;
280         }
281
282         if ((second_lvl_descriptor & 0x3) == 1) {
283                 /* large page descriptor */
284                 *val = (second_lvl_descriptor & 0xffff0000) | (va & 0x0000ffff);
285         } else {
286                 /* small page descriptor */
287                 *val = (second_lvl_descriptor & 0xfffff000) | (va & 0x00000fff);
288         }
289
290         return ERROR_OK;
291
292 done:
293         return retval;
294 }
295
296 /*  V7 method VA TO PA  */
297 int armv7a_mmu_translate_va_pa(struct target *target, uint32_t va,
298         uint32_t *val, int meminfo)
299 {
300         int retval = ERROR_FAIL;
301         struct armv7a_common *armv7a = target_to_armv7a(target);
302         struct arm_dpm *dpm = armv7a->arm.dpm;
303         uint32_t virt = va & ~0xfff;
304         uint32_t NOS, NS, INNER, OUTER;
305         *val = 0xdeadbeef;
306         retval = dpm->prepare(dpm);
307         if (retval != ERROR_OK)
308                 goto done;
309         /*  mmu must be enable in order to get a correct translation
310          *  use VA to PA CP15 register for conversion */
311         retval = dpm->instr_write_data_r0(dpm,
312                         ARMV4_5_MCR(15, 0, 0, 7, 8, 0),
313                         virt);
314         if (retval != ERROR_OK)
315                 goto done;
316         retval = dpm->instr_read_data_r0(dpm,
317                         ARMV4_5_MRC(15, 0, 0, 7, 4, 0),
318                         val);
319         /* decode memory attribute */
320         NOS = (*val >> 10) & 1; /*  Not Outer shareable */
321         NS = (*val >> 9) & 1;   /* Non secure */
322         INNER = (*val >> 4) &  0x7;
323         OUTER = (*val >> 2) & 0x3;
324
325         if (retval != ERROR_OK)
326                 goto done;
327         *val = (*val & ~0xfff)  +  (va & 0xfff);
328         if (*val == va)
329                 LOG_WARNING("virt = phys  : MMU disable !!");
330         if (meminfo) {
331                 LOG_INFO("%" PRIx32 " : %" PRIx32 " %s outer shareable %s secured",
332                         va, *val,
333                         NOS == 1 ? "not" : " ",
334                         NS == 1 ? "not" : "");
335                 switch (OUTER) {
336                         case 0:
337                                 LOG_INFO("outer: Non-Cacheable");
338                                 break;
339                         case 1:
340                                 LOG_INFO("outer: Write-Back, Write-Allocate");
341                                 break;
342                         case 2:
343                                 LOG_INFO("outer: Write-Through, No Write-Allocate");
344                                 break;
345                         case 3:
346                                 LOG_INFO("outer: Write-Back, no Write-Allocate");
347                                 break;
348                 }
349                 switch (INNER) {
350                         case 0:
351                                 LOG_INFO("inner: Non-Cacheable");
352                                 break;
353                         case 1:
354                                 LOG_INFO("inner: Strongly-ordered");
355                                 break;
356                         case 3:
357                                 LOG_INFO("inner: Device");
358                                 break;
359                         case 5:
360                                 LOG_INFO("inner: Write-Back, Write-Allocate");
361                                 break;
362                         case 6:
363                                 LOG_INFO("inner:  Write-Through");
364                                 break;
365                         case 7:
366                                 LOG_INFO("inner: Write-Back, no Write-Allocate");
367
368                         default:
369                                 LOG_INFO("inner: %" PRIx32 " ???", INNER);
370                 }
371         }
372
373 done:
374         dpm->finish(dpm);
375
376         return retval;
377 }
378
379 static int armv7a_handle_inner_cache_info_command(struct command_context *cmd_ctx,
380         struct armv7a_cache_common *armv7a_cache)
381 {
382         int cl;
383
384         if (armv7a_cache->info == -1) {
385                 command_print(cmd_ctx, "cache not yet identified");
386                 return ERROR_OK;
387         }
388
389         for (cl = 0; cl < armv7a_cache->loc; cl++) {
390                 struct armv7a_arch_cache *arch = &(armv7a_cache->arch[cl]);
391
392                 if (arch->ctype & 1) {
393                         command_print(cmd_ctx,
394                                 "L%d I-Cache: linelen %" PRIi32
395                                 ", associativity %" PRIi32
396                                 ", nsets %" PRIi32
397                                 ", cachesize %" PRId32 " KBytes",
398                                 cl+1,
399                                 arch->i_size.linelen,
400                                 arch->i_size.associativity,
401                                 arch->i_size.nsets,
402                                 arch->i_size.cachesize);
403                 }
404
405                 if (arch->ctype >= 2) {
406                         command_print(cmd_ctx,
407                                 "L%d D-Cache: linelen %" PRIi32
408                                 ", associativity %" PRIi32
409                                 ", nsets %" PRIi32
410                                 ", cachesize %" PRId32 " KBytes",
411                                 cl+1,
412                                 arch->d_u_size.linelen,
413                                 arch->d_u_size.associativity,
414                                 arch->d_u_size.nsets,
415                                 arch->d_u_size.cachesize);
416                 }
417         }
418
419         return ERROR_OK;
420 }
421
422 /* FIXME: remove it */
423 static int armv7a_l2x_cache_init(struct target *target, uint32_t base, uint32_t way)
424 {
425         struct armv7a_l2x_cache *l2x_cache;
426         struct target_list *head = target->head;
427         struct target *curr;
428
429         struct armv7a_common *armv7a = target_to_armv7a(target);
430         l2x_cache = calloc(1, sizeof(struct armv7a_l2x_cache));
431         l2x_cache->base = base;
432         l2x_cache->way = way;
433         /*LOG_INFO("cache l2 initialized base %x  way %d",
434         l2x_cache->base,l2x_cache->way);*/
435         if (armv7a->armv7a_mmu.armv7a_cache.outer_cache)
436                 LOG_INFO("outer cache already initialized\n");
437         armv7a->armv7a_mmu.armv7a_cache.outer_cache = l2x_cache;
438         /*  initialize all target in this cluster (smp target)
439          *  l2 cache must be configured after smp declaration */
440         while (head != (struct target_list *)NULL) {
441                 curr = head->target;
442                 if (curr != target) {
443                         armv7a = target_to_armv7a(curr);
444                         if (armv7a->armv7a_mmu.armv7a_cache.outer_cache)
445                                 LOG_ERROR("smp target : outer cache already initialized\n");
446                         armv7a->armv7a_mmu.armv7a_cache.outer_cache = l2x_cache;
447                 }
448                 head = head->next;
449         }
450         return JIM_OK;
451 }
452
453 /* FIXME: remove it */
454 COMMAND_HANDLER(handle_cache_l2x)
455 {
456         struct target *target = get_current_target(CMD_CTX);
457         uint32_t base, way;
458
459         if (CMD_ARGC != 2)
460                 return ERROR_COMMAND_SYNTAX_ERROR;
461
462         /* command_print(CMD_CTX, "%s %s", CMD_ARGV[0], CMD_ARGV[1]); */
463         COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], base);
464         COMMAND_PARSE_NUMBER(u32, CMD_ARGV[1], way);
465
466         /* AP address is in bits 31:24 of DP_SELECT */
467         armv7a_l2x_cache_init(target, base, way);
468
469         return ERROR_OK;
470 }
471
472 int armv7a_handle_cache_info_command(struct command_context *cmd_ctx,
473         struct armv7a_cache_common *armv7a_cache)
474 {
475         struct armv7a_l2x_cache *l2x_cache = (struct armv7a_l2x_cache *)
476                 (armv7a_cache->outer_cache);
477
478         if (armv7a_cache->info == -1) {
479                 command_print(cmd_ctx, "cache not yet identified");
480                 return ERROR_OK;
481         }
482
483         if (armv7a_cache->display_cache_info)
484                 armv7a_cache->display_cache_info(cmd_ctx, armv7a_cache);
485         if (l2x_cache != NULL)
486                 command_print(cmd_ctx, "Outer unified cache Base Address 0x%" PRIx32 ", %" PRId32 " ways",
487                         l2x_cache->base, l2x_cache->way);
488
489         return ERROR_OK;
490 }
491
492 /*  retrieve core id cluster id  */
493 static int armv7a_read_mpidr(struct target *target)
494 {
495         int retval = ERROR_FAIL;
496         struct armv7a_common *armv7a = target_to_armv7a(target);
497         struct arm_dpm *dpm = armv7a->arm.dpm;
498         uint32_t mpidr;
499         retval = dpm->prepare(dpm);
500         if (retval != ERROR_OK)
501                 goto done;
502         /* MRC p15,0,<Rd>,c0,c0,5; read Multiprocessor ID register*/
503
504         retval = dpm->instr_read_data_r0(dpm,
505                         ARMV4_5_MRC(15, 0, 0, 0, 0, 5),
506                         &mpidr);
507         if (retval != ERROR_OK)
508                 goto done;
509
510         /* ARMv7R uses a different format for MPIDR.
511          * When configured uniprocessor (most R cores) it reads as 0.
512          * This will need to be implemented for multiprocessor ARMv7R cores. */
513         if (armv7a->is_armv7r) {
514                 if (mpidr)
515                         LOG_ERROR("MPIDR nonzero in ARMv7-R target");
516                 goto done;
517         }
518
519         if (mpidr & 1<<31) {
520                 armv7a->multi_processor_system = (mpidr >> 30) & 1;
521                 armv7a->cluster_id = (mpidr >> 8) & 0xf;
522                 armv7a->cpu_id = mpidr & 0x3;
523                 LOG_INFO("%s cluster %x core %x %s", target_name(target),
524                         armv7a->cluster_id,
525                         armv7a->cpu_id,
526                         armv7a->multi_processor_system == 0 ? "multi core" : "mono core");
527
528         } else
529                 LOG_ERROR("MPIDR not in multiprocessor format");
530
531 done:
532         dpm->finish(dpm);
533         return retval;
534
535
536 }
537
538 static int get_cache_info(struct arm_dpm *dpm, int cl, int ct, uint32_t *cache_reg)
539 {
540         int retval = ERROR_OK;
541
542         /*  select cache level */
543         retval = dpm->instr_write_data_r0(dpm,
544                         ARMV4_5_MCR(15, 2, 0, 0, 0, 0),
545                         (cl << 1) | (ct == 1 ? 1 : 0));
546         if (retval != ERROR_OK)
547                 goto done;
548
549         retval = dpm->instr_read_data_r0(dpm,
550                         ARMV4_5_MRC(15, 1, 0, 0, 0, 0),
551                         cache_reg);
552  done:
553         return retval;
554 }
555
556 static struct armv7a_cachesize decode_cache_reg(uint32_t cache_reg)
557 {
558         struct armv7a_cachesize size;
559         int i = 0;
560
561         size.linelen = 16 << (cache_reg & 0x7);
562         size.associativity = ((cache_reg >> 3) & 0x3ff) + 1;
563         size.nsets = ((cache_reg >> 13) & 0x7fff) + 1;
564         size.cachesize = size.linelen * size.associativity * size.nsets / 1024;
565
566         /*  compute info for set way operation on cache */
567         size.index_shift = (cache_reg & 0x7) + 4;
568         size.index = (cache_reg >> 13) & 0x7fff;
569         size.way = ((cache_reg >> 3) & 0x3ff);
570
571         while (((size.way << i) & 0x80000000) == 0)
572                 i++;
573         size.way_shift = i;
574
575         return size;
576 }
577
578 int armv7a_identify_cache(struct target *target)
579 {
580         /*  read cache descriptor */
581         int retval = ERROR_FAIL;
582         struct armv7a_common *armv7a = target_to_armv7a(target);
583         struct arm_dpm *dpm = armv7a->arm.dpm;
584         uint32_t csselr, clidr, ctr;
585         uint32_t cache_reg;
586         int cl, ctype;
587         struct armv7a_cache_common *cache =
588                 &(armv7a->armv7a_mmu.armv7a_cache);
589
590         if (!armv7a->is_armv7r)
591                 armv7a_read_ttbcr(target);
592
593         retval = dpm->prepare(dpm);
594         if (retval != ERROR_OK)
595                 goto done;
596
597         /* retrieve CTR
598          * mrc p15, 0, r0, c0, c0, 1            @ read ctr */
599         retval = dpm->instr_read_data_r0(dpm,
600                         ARMV4_5_MRC(15, 0, 0, 0, 0, 1),
601                         &ctr);
602         if (retval != ERROR_OK)
603                 goto done;
604
605         cache->iminline = 4UL << (ctr & 0xf);
606         cache->dminline = 4UL << ((ctr & 0xf0000) >> 16);
607         LOG_DEBUG("ctr %" PRIx32 " ctr.iminline %" PRId32 " ctr.dminline %" PRId32,
608                  ctr, cache->iminline, cache->dminline);
609
610         /*  retrieve CLIDR
611          *  mrc p15, 1, r0, c0, c0, 1           @ read clidr */
612         retval = dpm->instr_read_data_r0(dpm,
613                         ARMV4_5_MRC(15, 1, 0, 0, 0, 1),
614                         &clidr);
615         if (retval != ERROR_OK)
616                 goto done;
617
618         cache->loc = (clidr & 0x7000000) >> 24;
619         LOG_DEBUG("Number of cache levels to PoC %" PRId32, cache->loc);
620
621         /*  retrieve selected cache for later restore
622          *  MRC p15, 2,<Rd>, c0, c0, 0; Read CSSELR */
623         retval = dpm->instr_read_data_r0(dpm,
624                         ARMV4_5_MRC(15, 2, 0, 0, 0, 0),
625                         &csselr);
626         if (retval != ERROR_OK)
627                 goto done;
628
629         /* retrieve all available inner caches */
630         for (cl = 0; cl < cache->loc; clidr >>= 3, cl++) {
631
632                 /* isolate cache type at current level */
633                 ctype = clidr & 7;
634
635                 /* skip reserved values */
636                 if (ctype > CACHE_LEVEL_HAS_UNIFIED_CACHE)
637                         continue;
638
639                 /* separate d or unified d/i cache at this level ? */
640                 if (ctype & (CACHE_LEVEL_HAS_UNIFIED_CACHE | CACHE_LEVEL_HAS_D_CACHE)) {
641                         /* retrieve d-cache info */
642                         retval = get_cache_info(dpm, cl, 0, &cache_reg);
643                         if (retval != ERROR_OK)
644                                 goto done;
645                         cache->arch[cl].d_u_size = decode_cache_reg(cache_reg);
646
647                         LOG_DEBUG("data/unified cache index %d << %d, way %d << %d",
648                                         cache->arch[cl].d_u_size.index,
649                                         cache->arch[cl].d_u_size.index_shift,
650                                         cache->arch[cl].d_u_size.way,
651                                         cache->arch[cl].d_u_size.way_shift);
652
653                         LOG_DEBUG("cacheline %d bytes %d KBytes asso %d ways",
654                                         cache->arch[cl].d_u_size.linelen,
655                                         cache->arch[cl].d_u_size.cachesize,
656                                         cache->arch[cl].d_u_size.associativity);
657                 }
658
659                 /* separate i-cache at this level ? */
660                 if (ctype & CACHE_LEVEL_HAS_I_CACHE) {
661                         /* retrieve i-cache info */
662                         retval = get_cache_info(dpm, cl, 1, &cache_reg);
663                         if (retval != ERROR_OK)
664                                 goto done;
665                         cache->arch[cl].i_size = decode_cache_reg(cache_reg);
666
667                         LOG_DEBUG("instruction cache index %d << %d, way %d << %d",
668                                         cache->arch[cl].i_size.index,
669                                         cache->arch[cl].i_size.index_shift,
670                                         cache->arch[cl].i_size.way,
671                                         cache->arch[cl].i_size.way_shift);
672
673                         LOG_DEBUG("cacheline %d bytes %d KBytes asso %d ways",
674                                         cache->arch[cl].i_size.linelen,
675                                         cache->arch[cl].i_size.cachesize,
676                                         cache->arch[cl].i_size.associativity);
677                 }
678
679                 cache->arch[cl].ctype = ctype;
680         }
681
682         /*  restore selected cache  */
683         dpm->instr_write_data_r0(dpm,
684                 ARMV4_5_MRC(15, 2, 0, 0, 0, 0),
685                 csselr);
686
687         if (retval != ERROR_OK)
688                 goto done;
689
690         /*  if no l2 cache initialize l1 data cache flush function function */
691         if (armv7a->armv7a_mmu.armv7a_cache.flush_all_data_cache == NULL) {
692                 armv7a->armv7a_mmu.armv7a_cache.display_cache_info =
693                         armv7a_handle_inner_cache_info_command;
694                 armv7a->armv7a_mmu.armv7a_cache.flush_all_data_cache =
695                         armv7a_cache_auto_flush_all_data;
696         }
697
698         armv7a->armv7a_mmu.armv7a_cache.info = 1;
699 done:
700         dpm->finish(dpm);
701         armv7a_read_mpidr(target);
702         return retval;
703
704 }
705
706 int armv7a_init_arch_info(struct target *target, struct armv7a_common *armv7a)
707 {
708         struct arm *arm = &armv7a->arm;
709         arm->arch_info = armv7a;
710         target->arch_info = &armv7a->arm;
711         /*  target is useful in all function arm v4 5 compatible */
712         armv7a->arm.target = target;
713         armv7a->arm.common_magic = ARM_COMMON_MAGIC;
714         armv7a->common_magic = ARMV7_COMMON_MAGIC;
715         armv7a->armv7a_mmu.armv7a_cache.info = -1;
716         armv7a->armv7a_mmu.armv7a_cache.outer_cache = NULL;
717         armv7a->armv7a_mmu.armv7a_cache.flush_all_data_cache = NULL;
718         armv7a->armv7a_mmu.armv7a_cache.display_cache_info = NULL;
719         armv7a->armv7a_mmu.armv7a_cache.auto_cache_enabled = 1;
720         return ERROR_OK;
721 }
722
723 int armv7a_arch_state(struct target *target)
724 {
725         static const char *state[] = {
726                 "disabled", "enabled"
727         };
728
729         struct armv7a_common *armv7a = target_to_armv7a(target);
730         struct arm *arm = &armv7a->arm;
731
732         if (armv7a->common_magic != ARMV7_COMMON_MAGIC) {
733                 LOG_ERROR("BUG: called for a non-ARMv7A target");
734                 return ERROR_COMMAND_SYNTAX_ERROR;
735         }
736
737         arm_arch_state(target);
738
739         if (armv7a->is_armv7r) {
740                 LOG_USER("D-Cache: %s, I-Cache: %s",
741                         state[armv7a->armv7a_mmu.armv7a_cache.d_u_cache_enabled],
742                         state[armv7a->armv7a_mmu.armv7a_cache.i_cache_enabled]);
743         } else {
744                 LOG_USER("MMU: %s, D-Cache: %s, I-Cache: %s",
745                         state[armv7a->armv7a_mmu.mmu_enabled],
746                         state[armv7a->armv7a_mmu.armv7a_cache.d_u_cache_enabled],
747                         state[armv7a->armv7a_mmu.armv7a_cache.i_cache_enabled]);
748         }
749
750         if (arm->core_mode == ARM_MODE_ABT)
751                 armv7a_show_fault_registers(target);
752         if (target->debug_reason == DBG_REASON_WATCHPOINT)
753                 LOG_USER("Watchpoint triggered at PC %#08x",
754                         (unsigned) armv7a->dpm.wp_pc);
755
756         return ERROR_OK;
757 }
758
759 static const struct command_registration l2_cache_commands[] = {
760         {
761                 .name = "l2x",
762                 .handler = handle_cache_l2x,
763                 .mode = COMMAND_EXEC,
764                 .help = "configure l2x cache "
765                         "",
766                 .usage = "[base_addr] [number_of_way]",
767         },
768         COMMAND_REGISTRATION_DONE
769
770 };
771
772 const struct command_registration l2x_cache_command_handlers[] = {
773         {
774                 .name = "cache_config",
775                 .mode = COMMAND_EXEC,
776                 .help = "cache configuration for a target",
777                 .usage = "",
778                 .chain = l2_cache_commands,
779         },
780         COMMAND_REGISTRATION_DONE
781 };
782
783 const struct command_registration armv7a_command_handlers[] = {
784         {
785                 .chain = dap_command_handlers,
786         },
787         {
788                 .chain = l2x_cache_command_handlers,
789         },
790         {
791                 .chain = arm7a_cache_command_handlers,
792         },
793         COMMAND_REGISTRATION_DONE
794 };