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Matt Hsu <matt@0xlab.org> and Holger Hans Peter Freyther <zecke@selfish.org> Before...
[openocd.git] / src / target / cortex_a8.c
1 /***************************************************************************
2 * Copyright (C) 2005 by Dominic Rath *
3 * Dominic.Rath@gmx.de *
4 * *
5 * Copyright (C) 2006 by Magnus Lundin *
6 * lundin@mlu.mine.nu *
7 * *
8 * Copyright (C) 2008 by Spencer Oliver *
9 * spen@spen-soft.co.uk *
10 * *
11 * Copyright (C) 2009 by Dirk Behme *
12 * dirk.behme@gmail.com - copy from cortex_m3 *
13 * *
14 * This program is free software; you can redistribute it and/or modify *
15 * it under the terms of the GNU General Public License as published by *
16 * the Free Software Foundation; either version 2 of the License, or *
17 * (at your option) any later version. *
18 * *
19 * This program is distributed in the hope that it will be useful, *
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
22 * GNU General Public License for more details. *
23 * *
24 * You should have received a copy of the GNU General Public License *
25 * along with this program; if not, write to the *
26 * Free Software Foundation, Inc., *
27 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
28 * *
29 * Cortex-A8(tm) TRM, ARM DDI 0344H *
30 * *
31 ***************************************************************************/
32 #ifdef HAVE_CONFIG_H
33 #include "config.h"
34 #endif
35
36 #include "cortex_a8.h"
37 #include "armv7a.h"
38 #include "armv4_5.h"
39
40 #include "target_request.h"
41 #include "target_type.h"
42
43 /* cli handling */
44 int cortex_a8_register_commands(struct command_context_s *cmd_ctx);
45
46 /* forward declarations */
47 int cortex_a8_target_create(struct target_s *target, Jim_Interp *interp);
48 int cortex_a8_init_target(struct command_context_s *cmd_ctx,
49 struct target_s *target);
50 int cortex_a8_examine(struct target_s *target);
51 int cortex_a8_poll(target_t *target);
52 int cortex_a8_halt(target_t *target);
53 int cortex_a8_resume(struct target_s *target, int current, uint32_t address,
54 int handle_breakpoints, int debug_execution);
55 int cortex_a8_step(struct target_s *target, int current, uint32_t address,
56 int handle_breakpoints);
57 int cortex_a8_debug_entry(target_t *target);
58 int cortex_a8_restore_context(target_t *target);
59 int cortex_a8_bulk_write_memory(target_t *target, uint32_t address,
60 uint32_t count, uint8_t *buffer);
61 int cortex_a8_set_breakpoint(struct target_s *target,
62 breakpoint_t *breakpoint, uint8_t matchmode);
63 int cortex_a8_unset_breakpoint(struct target_s *target, breakpoint_t *breakpoint);
64 int cortex_a8_add_breakpoint(struct target_s *target, breakpoint_t *breakpoint);
65 int cortex_a8_remove_breakpoint(struct target_s *target, breakpoint_t *breakpoint);
66 int cortex_a8_dap_read_coreregister_u32(target_t *target,
67 uint32_t *value, int regnum);
68 int cortex_a8_dap_write_coreregister_u32(target_t *target,
69 uint32_t value, int regnum);
70
71 target_type_t cortexa8_target =
72 {
73 .name = "cortex_a8",
74
75 .poll = cortex_a8_poll,
76 .arch_state = armv7a_arch_state,
77
78 .target_request_data = NULL,
79
80 .halt = cortex_a8_halt,
81 .resume = cortex_a8_resume,
82 .step = cortex_a8_step,
83
84 .assert_reset = NULL,
85 .deassert_reset = NULL,
86 .soft_reset_halt = NULL,
87
88 // .get_gdb_reg_list = armv4_5_get_gdb_reg_list,
89 .get_gdb_reg_list = armv4_5_get_gdb_reg_list,
90
91 .read_memory = cortex_a8_read_memory,
92 .write_memory = cortex_a8_write_memory,
93 .bulk_write_memory = cortex_a8_bulk_write_memory,
94 .checksum_memory = arm7_9_checksum_memory,
95 .blank_check_memory = arm7_9_blank_check_memory,
96
97 .run_algorithm = armv4_5_run_algorithm,
98
99 .add_breakpoint = cortex_a8_add_breakpoint,
100 .remove_breakpoint = cortex_a8_remove_breakpoint,
101 .add_watchpoint = NULL,
102 .remove_watchpoint = NULL,
103
104 .register_commands = cortex_a8_register_commands,
105 .target_create = cortex_a8_target_create,
106 .init_target = cortex_a8_init_target,
107 .examine = cortex_a8_examine,
108 .quit = NULL
109 };
110
111 /*
112 * FIXME do topology discovery using the ROM; don't
113 * assume this is an OMAP3.
114 */
115 #define swjdp_memoryap 0
116 #define swjdp_debugap 1
117 #define OMAP3530_DEBUG_BASE 0x54011000
118
119 /*
120 * Cortex-A8 Basic debug access, very low level assumes state is saved
121 */
122 int cortex_a8_init_debug_access(target_t *target)
123 {
124 #if 0
125 # Unlocking the debug registers for modification
126 mww 0x54011FB0 0xC5ACCE55 4
127
128 # Clear Sticky Power Down status Bit to enable access to
129 # the registers in the Core Power Domain
130 mdw 0x54011314
131 # Check that it is cleared
132 mdw 0x54011314
133 # Now we can read Core Debug Registers at offset 0x080
134 mdw 0x54011080 4
135 # We can also read RAM.
136 mdw 0x80000000 32
137
138 mdw 0x5401d030
139 mdw 0x54011FB8
140
141 # Set DBGEN line for hardware debug (OMAP35xx)
142 mww 0x5401d030 0x00002000
143
144 #Check AUTHSTATUS
145 mdw 0x54011FB8
146
147 # Instr enable
148 mww 0x54011088 0x2000
149 mdw 0x54011080 4
150 #endif
151 return ERROR_OK;
152 }
153
154 int cortex_a8_exec_opcode(target_t *target, uint32_t opcode)
155 {
156 uint32_t dscr;
157 int retvalue;
158 /* get pointers to arch-specific information */
159 armv4_5_common_t *armv4_5 = target->arch_info;
160 armv7a_common_t *armv7a = armv4_5->arch_info;
161 swjdp_common_t *swjdp = &armv7a->swjdp_info;
162
163 LOG_DEBUG("exec opcode 0x%08" PRIx32, opcode);
164 do
165 {
166 retvalue = mem_ap_read_atomic_u32(swjdp,
167 OMAP3530_DEBUG_BASE + CPUDBG_DSCR, &dscr);
168 }
169 while ((dscr & (1 << 24)) == 0); /* Wait for InstrCompl bit to be set */
170
171 mem_ap_write_u32(swjdp, OMAP3530_DEBUG_BASE + CPUDBG_ITR, opcode);
172
173 do
174 {
175 retvalue = mem_ap_read_atomic_u32(swjdp,
176 OMAP3530_DEBUG_BASE + CPUDBG_DSCR, &dscr);
177 }
178 while ((dscr & (1 << 24)) == 0); /* Wait for InstrCompl bit to be set */
179
180 return retvalue;
181 }
182
183 /**************************************************************************
184 Read core register with very few exec_opcode, fast but needs work_area.
185 This can cause problems with MMU active.
186 **************************************************************************/
187 int cortex_a8_read_regs_through_mem(target_t *target, uint32_t address,
188 uint32_t * regfile)
189 {
190 int retval = ERROR_OK;
191 /* get pointers to arch-specific information */
192 armv4_5_common_t *armv4_5 = target->arch_info;
193 armv7a_common_t *armv7a = armv4_5->arch_info;
194 swjdp_common_t *swjdp = &armv7a->swjdp_info;
195
196 cortex_a8_dap_read_coreregister_u32(target, regfile, 0);
197 cortex_a8_dap_write_coreregister_u32(target, address, 0);
198 cortex_a8_exec_opcode(target, ARMV4_5_STMIA(0, 0xFFFE, 0, 0));
199 dap_ap_select(swjdp, swjdp_memoryap);
200 mem_ap_read_buf_u32(swjdp, (uint8_t *)(&regfile[1]), 4*15, address);
201 dap_ap_select(swjdp, swjdp_debugap);
202
203 return retval;
204 }
205
206 int cortex_a8_read_cp(target_t *target, uint32_t *value, uint8_t CP,
207 uint8_t op1, uint8_t CRn, uint8_t CRm, uint8_t op2)
208 {
209 int retval;
210 /* get pointers to arch-specific information */
211 armv4_5_common_t *armv4_5 = target->arch_info;
212 armv7a_common_t *armv7a = armv4_5->arch_info;
213 swjdp_common_t *swjdp = &armv7a->swjdp_info;
214
215 cortex_a8_exec_opcode(target, ARMV4_5_MRC(CP, op1, 0, CRn, CRm, op2));
216 /* Move R0 to DTRTX */
217 cortex_a8_exec_opcode(target, ARMV4_5_MCR(14, 0, 0, 0, 5, 0));
218
219 /* Read DCCTX */
220 retval = mem_ap_read_atomic_u32(swjdp,
221 OMAP3530_DEBUG_BASE + CPUDBG_DTRTX, value);
222
223 return retval;
224 }
225
226 int cortex_a8_write_cp(target_t *target, uint32_t value,
227 uint8_t CP, uint8_t op1, uint8_t CRn, uint8_t CRm, uint8_t op2)
228 /* TODO Fix this */
229 {
230 int retval;
231 /* get pointers to arch-specific information */
232 armv4_5_common_t *armv4_5 = target->arch_info;
233 armv7a_common_t *armv7a = armv4_5->arch_info;
234 swjdp_common_t *swjdp = &armv7a->swjdp_info;
235
236 retval = mem_ap_write_u32(swjdp,
237 OMAP3530_DEBUG_BASE + CPUDBG_DTRRX, value);
238 /* Move DTRRX to r0 */
239 cortex_a8_exec_opcode(target, ARMV4_5_MRC(14, 0, 0, 0, 5, 0));
240
241 cortex_a8_exec_opcode(target, ARMV4_5_MCR(CP, 0, 0, 0, 5, 0));
242 return retval;
243 }
244
245 int cortex_a8_read_cp15(target_t *target, uint32_t op1, uint32_t op2,
246 uint32_t CRn, uint32_t CRm, uint32_t *value)
247 {
248 return cortex_a8_read_cp(target, value, 15, op1, CRn, CRm, op2);
249 }
250
251 int cortex_a8_write_cp15(target_t *target, uint32_t op1, uint32_t op2,
252 uint32_t CRn, uint32_t CRm, uint32_t value)
253 {
254 return cortex_a8_write_cp(target, value, 15, op1, CRn, CRm, op2);
255 }
256
257 int cortex_a8_dap_read_coreregister_u32(target_t *target,
258 uint32_t *value, int regnum)
259 {
260 int retval = ERROR_OK;
261 uint8_t reg = regnum&0xFF;
262
263 /* get pointers to arch-specific information */
264 armv4_5_common_t *armv4_5 = target->arch_info;
265 armv7a_common_t *armv7a = armv4_5->arch_info;
266 swjdp_common_t *swjdp = &armv7a->swjdp_info;
267
268 swjdp->trans_mode = TRANS_MODE_COMPOSITE;
269
270 if (reg > 16)
271 return retval;
272
273 if (reg < 15)
274 {
275 /* Rn to DCCTX, MCR p14, 0, Rd, c0, c5, 0, 0xEE000E15 */
276 cortex_a8_exec_opcode(target, ARMV4_5_MCR(14, 0, reg, 0, 5, 0));
277 }
278 else if (reg == 15)
279 {
280 cortex_a8_exec_opcode(target, 0xE1A0000F);
281 cortex_a8_exec_opcode(target, ARMV4_5_MCR(14, 0, 0, 0, 5, 0));
282 }
283 else if (reg == 16)
284 {
285 cortex_a8_exec_opcode(target, ARMV4_5_MRS(0, 0));
286 cortex_a8_exec_opcode(target, ARMV4_5_MCR(14, 0, 0, 0, 5, 0));
287 }
288
289 /* Read DCCTX */
290 retval = mem_ap_read_atomic_u32(swjdp,
291 OMAP3530_DEBUG_BASE + CPUDBG_DTRTX, value);
292 // retval = mem_ap_read_u32(swjdp, OMAP3530_DEBUG_BASE + CPUDBG_DTRTX, value);
293
294 return retval;
295 }
296
297 int cortex_a8_dap_write_coreregister_u32(target_t *target, uint32_t value, int regnum)
298 {
299 int retval = ERROR_OK;
300 uint8_t Rd = regnum&0xFF;
301
302 /* get pointers to arch-specific information */
303 armv4_5_common_t *armv4_5 = target->arch_info;
304 armv7a_common_t *armv7a = armv4_5->arch_info;
305 swjdp_common_t *swjdp = &armv7a->swjdp_info;
306
307 if (Rd > 16)
308 return retval;
309
310 /* Write to DCCRX */
311 retval = mem_ap_write_u32(swjdp,
312 OMAP3530_DEBUG_BASE + CPUDBG_DTRRX, value);
313
314 if (Rd < 15)
315 {
316 /* DCCRX to Rd, MCR p14, 0, Rd, c0, c5, 0, 0xEE000E15 */
317 cortex_a8_exec_opcode(target, ARMV4_5_MRC(14, 0, Rd, 0, 5, 0));
318 }
319 else if (Rd == 15)
320 {
321 cortex_a8_exec_opcode(target, ARMV4_5_MRC(14, 0, 0, 0, 5, 0));
322 cortex_a8_exec_opcode(target, 0xE1A0F000);
323 }
324 else if (Rd == 16)
325 {
326 cortex_a8_exec_opcode(target, ARMV4_5_MRC(14, 0, 0, 0, 5, 0));
327 cortex_a8_exec_opcode(target, ARMV4_5_MSR_GP(0, 0xF, 0));
328 /* Execute a PrefetchFlush instruction through the ITR. */
329 cortex_a8_exec_opcode(target, ARMV4_5_MCR(15, 0, 0, 7, 5, 4));
330 }
331
332 return retval;
333 }
334
335 /*
336 * Cortex-A8 Run control
337 */
338
339 int cortex_a8_poll(target_t *target)
340 {
341 int retval = ERROR_OK;
342 uint32_t dscr;
343 /* get pointers to arch-specific information */
344 armv4_5_common_t *armv4_5 = target->arch_info;
345 armv7a_common_t *armv7a = armv4_5->arch_info;
346 cortex_a8_common_t *cortex_a8 = armv7a->arch_info;
347 swjdp_common_t *swjdp = &armv7a->swjdp_info;
348
349
350 enum target_state prev_target_state = target->state;
351
352 uint8_t saved_apsel = dap_ap_get_select(swjdp);
353 dap_ap_select(swjdp, swjdp_debugap);
354 retval = mem_ap_read_atomic_u32(swjdp,
355 OMAP3530_DEBUG_BASE + CPUDBG_DSCR, &dscr);
356 if (retval != ERROR_OK)
357 {
358 dap_ap_select(swjdp, saved_apsel);
359 return retval;
360 }
361 cortex_a8->cpudbg_dscr = dscr;
362
363 if ((dscr & 0x3) == 0x3)
364 {
365 if (prev_target_state != TARGET_HALTED)
366 {
367 /* We have a halting debug event */
368 LOG_DEBUG("Target halted");
369 target->state = TARGET_HALTED;
370 if ((prev_target_state == TARGET_RUNNING)
371 || (prev_target_state == TARGET_RESET))
372 {
373 retval = cortex_a8_debug_entry(target);
374 if (retval != ERROR_OK)
375 return retval;
376
377 target_call_event_callbacks(target,
378 TARGET_EVENT_HALTED);
379 }
380 if (prev_target_state == TARGET_DEBUG_RUNNING)
381 {
382 LOG_DEBUG(" ");
383
384 retval = cortex_a8_debug_entry(target);
385 if (retval != ERROR_OK)
386 return retval;
387
388 target_call_event_callbacks(target,
389 TARGET_EVENT_DEBUG_HALTED);
390 }
391 }
392 }
393 else if ((dscr & 0x3) == 0x2)
394 {
395 target->state = TARGET_RUNNING;
396 }
397 else
398 {
399 LOG_DEBUG("Unknown target state dscr = 0x%08" PRIx32, dscr);
400 target->state = TARGET_UNKNOWN;
401 }
402
403 dap_ap_select(swjdp, saved_apsel);
404
405 return retval;
406 }
407
408 int cortex_a8_halt(target_t *target)
409 {
410 int retval = ERROR_OK;
411 /* get pointers to arch-specific information */
412 armv4_5_common_t *armv4_5 = target->arch_info;
413 armv7a_common_t *armv7a = armv4_5->arch_info;
414 swjdp_common_t *swjdp = &armv7a->swjdp_info;
415
416 uint8_t saved_apsel = dap_ap_get_select(swjdp);
417 dap_ap_select(swjdp, swjdp_debugap);
418
419 /* Perhaps we should do a read-modify-write here */
420 retval = mem_ap_write_atomic_u32(swjdp,
421 OMAP3530_DEBUG_BASE + CPUDBG_DRCR, 0x1);
422
423 target->debug_reason = DBG_REASON_DBGRQ;
424 dap_ap_select(swjdp, saved_apsel);
425
426 return retval;
427 }
428
429 int cortex_a8_resume(struct target_s *target, int current,
430 uint32_t address, int handle_breakpoints, int debug_execution)
431 {
432 /* get pointers to arch-specific information */
433 armv4_5_common_t *armv4_5 = target->arch_info;
434 armv7a_common_t *armv7a = armv4_5->arch_info;
435 cortex_a8_common_t *cortex_a8 = armv7a->arch_info;
436 swjdp_common_t *swjdp = &armv7a->swjdp_info;
437
438 // breakpoint_t *breakpoint = NULL;
439 uint32_t resume_pc;
440
441 uint8_t saved_apsel = dap_ap_get_select(swjdp);
442 dap_ap_select(swjdp, swjdp_debugap);
443
444 if (!debug_execution)
445 {
446 target_free_all_working_areas(target);
447 // cortex_m3_enable_breakpoints(target);
448 // cortex_m3_enable_watchpoints(target);
449 }
450
451 #if 0
452 if (debug_execution)
453 {
454 /* Disable interrupts */
455 /* We disable interrupts in the PRIMASK register instead of
456 * masking with C_MASKINTS,
457 * This is probably the same issue as Cortex-M3 Errata 377493:
458 * C_MASKINTS in parallel with disabled interrupts can cause
459 * local faults to not be taken. */
460 buf_set_u32(armv7m->core_cache->reg_list[ARMV7M_PRIMASK].value, 0, 32, 1);
461 armv7m->core_cache->reg_list[ARMV7M_PRIMASK].dirty = 1;
462 armv7m->core_cache->reg_list[ARMV7M_PRIMASK].valid = 1;
463
464 /* Make sure we are in Thumb mode */
465 buf_set_u32(armv7m->core_cache->reg_list[ARMV7M_xPSR].value, 0, 32,
466 buf_get_u32(armv7m->core_cache->reg_list[ARMV7M_xPSR].value, 0, 32) | (1 << 24));
467 armv7m->core_cache->reg_list[ARMV7M_xPSR].dirty = 1;
468 armv7m->core_cache->reg_list[ARMV7M_xPSR].valid = 1;
469 }
470 #endif
471
472 /* current = 1: continue on current pc, otherwise continue at <address> */
473 resume_pc = buf_get_u32(
474 ARMV7A_CORE_REG_MODE(armv4_5->core_cache,
475 armv4_5->core_mode, 15).value,
476 0, 32);
477 if (!current)
478 resume_pc = address;
479
480 /* Make sure that the Armv7 gdb thumb fixups does not
481 * kill the return address
482 */
483 if (!(cortex_a8->cpudbg_dscr & (1 << 5)))
484 {
485 resume_pc &= 0xFFFFFFFC;
486 }
487 LOG_DEBUG("resume pc = 0x%08" PRIx32, resume_pc);
488 buf_set_u32(ARMV7A_CORE_REG_MODE(armv4_5->core_cache,
489 armv4_5->core_mode, 15).value,
490 0, 32, resume_pc);
491 ARMV7A_CORE_REG_MODE(armv4_5->core_cache,
492 armv4_5->core_mode, 15).dirty = 1;
493 ARMV7A_CORE_REG_MODE(armv4_5->core_cache,
494 armv4_5->core_mode, 15).valid = 1;
495
496 cortex_a8_restore_context(target);
497 // arm7_9_restore_context(target); TODO Context is currently NOT Properly restored
498 #if 0
499 /* the front-end may request us not to handle breakpoints */
500 if (handle_breakpoints)
501 {
502 /* Single step past breakpoint at current address */
503 if ((breakpoint = breakpoint_find(target, resume_pc)))
504 {
505 LOG_DEBUG("unset breakpoint at 0x%8.8x", breakpoint->address);
506 cortex_m3_unset_breakpoint(target, breakpoint);
507 cortex_m3_single_step_core(target);
508 cortex_m3_set_breakpoint(target, breakpoint);
509 }
510 }
511
512 #endif
513 /* Restart core */
514 /* Perhaps we should do a read-modify-write here */
515 mem_ap_write_atomic_u32(swjdp, OMAP3530_DEBUG_BASE + CPUDBG_DRCR, 0x2);
516
517 target->debug_reason = DBG_REASON_NOTHALTED;
518 target->state = TARGET_RUNNING;
519
520 /* registers are now invalid */
521 armv4_5_invalidate_core_regs(target);
522
523 if (!debug_execution)
524 {
525 target->state = TARGET_RUNNING;
526 target_call_event_callbacks(target, TARGET_EVENT_RESUMED);
527 LOG_DEBUG("target resumed at 0x%" PRIx32, resume_pc);
528 }
529 else
530 {
531 target->state = TARGET_DEBUG_RUNNING;
532 target_call_event_callbacks(target, TARGET_EVENT_DEBUG_RESUMED);
533 LOG_DEBUG("target debug resumed at 0x%" PRIx32, resume_pc);
534 }
535
536 dap_ap_select(swjdp, saved_apsel);
537
538 return ERROR_OK;
539 }
540
541 int cortex_a8_debug_entry(target_t *target)
542 {
543 int i;
544 uint32_t regfile[16], pc, cpsr;
545 int retval = ERROR_OK;
546 working_area_t *regfile_working_area = NULL;
547
548 /* get pointers to arch-specific information */
549 armv4_5_common_t *armv4_5 = target->arch_info;
550 armv7a_common_t *armv7a = armv4_5->arch_info;
551 cortex_a8_common_t *cortex_a8 = armv7a->arch_info;
552 swjdp_common_t *swjdp = &armv7a->swjdp_info;
553
554 if (armv7a->pre_debug_entry)
555 armv7a->pre_debug_entry(target);
556
557 LOG_DEBUG("dscr = 0x%08" PRIx32, cortex_a8->cpudbg_dscr);
558
559 /* Examine debug reason */
560 switch ((cortex_a8->cpudbg_dscr >> 2)&0xF)
561 {
562 case 0:
563 case 4:
564 target->debug_reason = DBG_REASON_DBGRQ;
565 break;
566 case 1:
567 case 3:
568 target->debug_reason = DBG_REASON_BREAKPOINT;
569 break;
570 case 10:
571 target->debug_reason = DBG_REASON_WATCHPOINT;
572 break;
573 default:
574 target->debug_reason = DBG_REASON_UNDEFINED;
575 break;
576 }
577
578 /* Examine target state and mode */
579 dap_ap_select(swjdp, swjdp_memoryap);
580 if (cortex_a8->fast_reg_read)
581 target_alloc_working_area(target, 64, &regfile_working_area);
582
583 /* First load register acessible through core debug port*/
584 if (!regfile_working_area)
585 {
586 for (i = 0; i <= 15; i++)
587 cortex_a8_dap_read_coreregister_u32(target,
588 &regfile[i], i);
589 }
590 else
591 {
592 cortex_a8_read_regs_through_mem(target,
593 regfile_working_area->address, regfile);
594 dap_ap_select(swjdp, swjdp_memoryap);
595 target_free_working_area(target, regfile_working_area);
596 }
597
598 cortex_a8_dap_read_coreregister_u32(target, &cpsr, 16);
599 pc = regfile[15];
600 dap_ap_select(swjdp, swjdp_debugap);
601 LOG_DEBUG("cpsr: %8.8" PRIx32, cpsr);
602
603 armv4_5->core_mode = cpsr & 0x3F;
604
605 for (i = 0; i <= ARM_PC; i++)
606 {
607 buf_set_u32(ARMV7A_CORE_REG_MODE(armv4_5->core_cache,
608 armv4_5->core_mode, i).value,
609 0, 32, regfile[i]);
610 ARMV7A_CORE_REG_MODE(armv4_5->core_cache,
611 armv4_5->core_mode, i).valid = 1;
612 ARMV7A_CORE_REG_MODE(armv4_5->core_cache,
613 armv4_5->core_mode, i).dirty = 0;
614 }
615 buf_set_u32(ARMV7A_CORE_REG_MODE(armv4_5->core_cache,
616 armv4_5->core_mode, 16).value,
617 0, 32, cpsr);
618 ARMV7A_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 16).valid = 1;
619 ARMV7A_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 16).dirty = 0;
620
621 /* Fixup PC Resume Address */
622 /* TODO Her we should use arch->core_state */
623 if (cortex_a8->cpudbg_dscr & (1 << 5))
624 {
625 // T bit set for Thumb or ThumbEE state
626 regfile[ARM_PC] -= 4;
627 }
628 else
629 {
630 // ARM state
631 regfile[ARM_PC] -= 8;
632 }
633 buf_set_u32(ARMV7A_CORE_REG_MODE(armv4_5->core_cache,
634 armv4_5->core_mode, ARM_PC).value,
635 0, 32, regfile[ARM_PC]);
636
637 ARMV7A_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 0)
638 .dirty = ARMV7A_CORE_REG_MODE(armv4_5->core_cache,
639 armv4_5->core_mode, 0).valid;
640 ARMV7A_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, 15)
641 .dirty = ARMV7A_CORE_REG_MODE(armv4_5->core_cache,
642 armv4_5->core_mode, 15).valid;
643
644 #if 0
645 /* TODO, Move this */
646 uint32_t cp15_control_register, cp15_cacr, cp15_nacr;
647 cortex_a8_read_cp(target, &cp15_control_register, 15, 0, 1, 0, 0);
648 LOG_DEBUG("cp15_control_register = 0x%08x", cp15_control_register);
649
650 cortex_a8_read_cp(target, &cp15_cacr, 15, 0, 1, 0, 2);
651 LOG_DEBUG("cp15 Coprocessor Access Control Register = 0x%08x", cp15_cacr);
652
653 cortex_a8_read_cp(target, &cp15_nacr, 15, 0, 1, 1, 2);
654 LOG_DEBUG("cp15 Nonsecure Access Control Register = 0x%08x", cp15_nacr);
655 #endif
656
657 /* Are we in an exception handler */
658 // armv4_5->exception_number = 0;
659 if (armv7a->post_debug_entry)
660 armv7a->post_debug_entry(target);
661
662
663
664 return retval;
665
666 }
667
668 void cortex_a8_post_debug_entry(target_t *target)
669 {
670 /* get pointers to arch-specific information */
671 armv4_5_common_t *armv4_5 = target->arch_info;
672 armv7a_common_t *armv7a = armv4_5->arch_info;
673 cortex_a8_common_t *cortex_a8 = armv7a->arch_info;
674
675 // cortex_a8_read_cp(target, &cp15_control_register, 15, 0, 1, 0, 0);
676 /* examine cp15 control reg */
677 armv7a->read_cp15(target, 0, 0, 1, 0, &cortex_a8->cp15_control_reg);
678 jtag_execute_queue();
679 LOG_DEBUG("cp15_control_reg: %8.8" PRIx32, cortex_a8->cp15_control_reg);
680
681 if (armv7a->armv4_5_mmu.armv4_5_cache.ctype == -1)
682 {
683 uint32_t cache_type_reg;
684 /* identify caches */
685 armv7a->read_cp15(target, 0, 1, 0, 0, &cache_type_reg);
686 jtag_execute_queue();
687 /* FIXME the armv4_4 cache info DOES NOT APPLY to Cortex-A8 */
688 armv4_5_identify_cache(cache_type_reg,
689 &armv7a->armv4_5_mmu.armv4_5_cache);
690 }
691
692 armv7a->armv4_5_mmu.mmu_enabled =
693 (cortex_a8->cp15_control_reg & 0x1U) ? 1 : 0;
694 armv7a->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled =
695 (cortex_a8->cp15_control_reg & 0x4U) ? 1 : 0;
696 armv7a->armv4_5_mmu.armv4_5_cache.i_cache_enabled =
697 (cortex_a8->cp15_control_reg & 0x1000U) ? 1 : 0;
698
699
700 }
701
702 int cortex_a8_step(struct target_s *target, int current, uint32_t address,
703 int handle_breakpoints)
704 {
705 /* get pointers to arch-specific information */
706 armv4_5_common_t *armv4_5 = target->arch_info;
707 armv7a_common_t *armv7a = armv4_5->arch_info;
708 cortex_a8_common_t *cortex_a8 = armv7a->arch_info;
709 breakpoint_t *breakpoint = NULL;
710 breakpoint_t stepbreakpoint;
711
712 int timeout = 100;
713
714 if (target->state != TARGET_HALTED)
715 {
716 LOG_WARNING("target not halted");
717 return ERROR_TARGET_NOT_HALTED;
718 }
719
720 /* current = 1: continue on current pc, otherwise continue at <address> */
721 if (!current)
722 {
723 buf_set_u32(ARMV7A_CORE_REG_MODE(armv4_5->core_cache,
724 armv4_5->core_mode, ARM_PC).value,
725 0, 32, address);
726 }
727 else
728 {
729 address = buf_get_u32(ARMV7A_CORE_REG_MODE(armv4_5->core_cache,
730 armv4_5->core_mode, ARM_PC).value,
731 0, 32);
732 }
733
734 /* The front-end may request us not to handle breakpoints.
735 * But since Cortex-A8 uses breakpoint for single step,
736 * we MUST handle breakpoints.
737 */
738 handle_breakpoints = 1;
739 if (handle_breakpoints) {
740 breakpoint = breakpoint_find(target,
741 buf_get_u32(ARMV7A_CORE_REG_MODE(armv4_5->core_cache,
742 armv4_5->core_mode, 15).value,
743 0, 32));
744 if (breakpoint)
745 cortex_a8_unset_breakpoint(target, breakpoint);
746 }
747
748 /* Setup single step breakpoint */
749 stepbreakpoint.address = address;
750 stepbreakpoint.length = (cortex_a8->cpudbg_dscr & (1 << 5)) ? 2 : 4;
751 stepbreakpoint.type = BKPT_HARD;
752 stepbreakpoint.set = 0;
753
754 /* Break on IVA mismatch */
755 cortex_a8_set_breakpoint(target, &stepbreakpoint, 0x04);
756
757 target->debug_reason = DBG_REASON_SINGLESTEP;
758
759 cortex_a8_resume(target, 1, address, 0, 0);
760
761 while (target->state != TARGET_HALTED)
762 {
763 cortex_a8_poll(target);
764 if (--timeout == 0)
765 {
766 LOG_WARNING("timeout waiting for target halt");
767 break;
768 }
769 }
770
771 cortex_a8_unset_breakpoint(target, &stepbreakpoint);
772 if (timeout > 0) target->debug_reason = DBG_REASON_BREAKPOINT;
773
774 if (breakpoint)
775 cortex_a8_set_breakpoint(target, breakpoint, 0);
776
777 if (target->state != TARGET_HALTED)
778 LOG_DEBUG("target stepped");
779
780 return ERROR_OK;
781 }
782
783 int cortex_a8_restore_context(target_t *target)
784 {
785 int i;
786 uint32_t value;
787
788 /* get pointers to arch-specific information */
789 armv4_5_common_t *armv4_5 = target->arch_info;
790 armv7a_common_t *armv7a = armv4_5->arch_info;
791
792 LOG_DEBUG(" ");
793
794 if (armv7a->pre_restore_context)
795 armv7a->pre_restore_context(target);
796
797 for (i = 15; i >= 0; i--)
798 {
799 if (ARMV7A_CORE_REG_MODE(armv4_5->core_cache,
800 armv4_5->core_mode, i).dirty)
801 {
802 value = buf_get_u32(ARMV7A_CORE_REG_MODE(armv4_5->core_cache,
803 armv4_5->core_mode, i).value,
804 0, 32);
805 /* TODO Check return values */
806 cortex_a8_dap_write_coreregister_u32(target, value, i);
807 }
808 }
809
810 if (armv7a->post_restore_context)
811 armv7a->post_restore_context(target);
812
813 return ERROR_OK;
814 }
815
816
817 /*
818 * Cortex-A8 Core register functions
819 */
820
821 int cortex_a8_load_core_reg_u32(struct target_s *target, int num,
822 armv4_5_mode_t mode, uint32_t * value)
823 {
824 int retval;
825 /* get pointers to arch-specific information */
826 armv4_5_common_t *armv4_5 = target->arch_info;
827
828 if ((num <= ARM_CPSR))
829 {
830 /* read a normal core register */
831 retval = cortex_a8_dap_read_coreregister_u32(target, value, num);
832
833 if (retval != ERROR_OK)
834 {
835 LOG_ERROR("JTAG failure %i", retval);
836 return ERROR_JTAG_DEVICE_ERROR;
837 }
838 LOG_DEBUG("load from core reg %i value 0x%" PRIx32, num, *value);
839 }
840 else
841 {
842 return ERROR_INVALID_ARGUMENTS;
843 }
844
845 /* Register other than r0 - r14 uses r0 for access */
846 if (num > 14)
847 ARMV7A_CORE_REG_MODE(armv4_5->core_cache,
848 armv4_5->core_mode, 0).dirty =
849 ARMV7A_CORE_REG_MODE(armv4_5->core_cache,
850 armv4_5->core_mode, 0).valid;
851 ARMV7A_CORE_REG_MODE(armv4_5->core_cache,
852 armv4_5->core_mode, 15).dirty =
853 ARMV7A_CORE_REG_MODE(armv4_5->core_cache,
854 armv4_5->core_mode, 15).valid;
855
856 return ERROR_OK;
857 }
858
859 int cortex_a8_store_core_reg_u32(struct target_s *target, int num,
860 armv4_5_mode_t mode, uint32_t value)
861 {
862 int retval;
863 // uint32_t reg;
864
865 /* get pointers to arch-specific information */
866 armv4_5_common_t *armv4_5 = target->arch_info;
867
868 #ifdef ARMV7_GDB_HACKS
869 /* If the LR register is being modified, make sure it will put us
870 * in "thumb" mode, or an INVSTATE exception will occur. This is a
871 * hack to deal with the fact that gdb will sometimes "forge"
872 * return addresses, and doesn't set the LSB correctly (i.e., when
873 * printing expressions containing function calls, it sets LR=0.) */
874
875 if (num == 14)
876 value |= 0x01;
877 #endif
878
879 if ((num <= ARM_CPSR))
880 {
881 retval = cortex_a8_dap_write_coreregister_u32(target, value, num);
882 if (retval != ERROR_OK)
883 {
884 LOG_ERROR("JTAG failure %i", retval);
885 ARMV7A_CORE_REG_MODE(armv4_5->core_cache,
886 armv4_5->core_mode, num).dirty =
887 ARMV7A_CORE_REG_MODE(armv4_5->core_cache,
888 armv4_5->core_mode, num).valid;
889 return ERROR_JTAG_DEVICE_ERROR;
890 }
891 LOG_DEBUG("write core reg %i value 0x%" PRIx32, num, value);
892 }
893 else
894 {
895 return ERROR_INVALID_ARGUMENTS;
896 }
897
898 return ERROR_OK;
899 }
900
901
902 int cortex_a8_read_core_reg(struct target_s *target, int num,
903 enum armv4_5_mode mode)
904 {
905 uint32_t value;
906 int retval;
907 armv4_5_common_t *armv4_5 = target->arch_info;
908 cortex_a8_dap_read_coreregister_u32(target, &value, num);
909
910 if ((retval = jtag_execute_queue()) != ERROR_OK)
911 {
912 return retval;
913 }
914
915 ARMV7A_CORE_REG_MODE(armv4_5->core_cache, mode, num).valid = 1;
916 ARMV7A_CORE_REG_MODE(armv4_5->core_cache, mode, num).dirty = 0;
917 buf_set_u32(ARMV7A_CORE_REG_MODE(armv4_5->core_cache,
918 mode, num).value, 0, 32, value);
919
920 return ERROR_OK;
921 }
922
923 int cortex_a8_write_core_reg(struct target_s *target, int num,
924 enum armv4_5_mode mode, uint32_t value)
925 {
926 int retval;
927 armv4_5_common_t *armv4_5 = target->arch_info;
928
929 cortex_a8_dap_write_coreregister_u32(target, value, num);
930 if ((retval = jtag_execute_queue()) != ERROR_OK)
931 {
932 return retval;
933 }
934
935 ARMV7A_CORE_REG_MODE(armv4_5->core_cache, mode, num).valid = 1;
936 ARMV7A_CORE_REG_MODE(armv4_5->core_cache, mode, num).dirty = 0;
937
938 return ERROR_OK;
939 }
940
941
942 /*
943 * Cortex-A8 Breakpoint and watchpoint fuctions
944 */
945
946 /* Setup hardware Breakpoint Register Pair */
947 int cortex_a8_set_breakpoint(struct target_s *target,
948 breakpoint_t *breakpoint, uint8_t matchmode)
949 {
950 int retval;
951 int brp_i=0;
952 uint32_t control;
953 uint8_t byte_addr_select = 0x0F;
954
955
956 /* get pointers to arch-specific information */
957 armv4_5_common_t *armv4_5 = target->arch_info;
958 armv7a_common_t *armv7a = armv4_5->arch_info;
959 cortex_a8_common_t *cortex_a8 = armv7a->arch_info;
960 cortex_a8_brp_t * brp_list = cortex_a8->brp_list;
961
962 if (breakpoint->set)
963 {
964 LOG_WARNING("breakpoint already set");
965 return ERROR_OK;
966 }
967
968 if (breakpoint->type == BKPT_HARD)
969 {
970 while (brp_list[brp_i].used && (brp_i < cortex_a8->brp_num))
971 brp_i++ ;
972 if (brp_i >= cortex_a8->brp_num)
973 {
974 LOG_ERROR("ERROR Can not find free Breakpoint Register Pair");
975 exit(-1);
976 }
977 breakpoint->set = brp_i + 1;
978 if (breakpoint->length == 2)
979 {
980 byte_addr_select = (3 << (breakpoint->address & 0x02));
981 }
982 control = ((matchmode & 0x7) << 20)
983 | (byte_addr_select << 5)
984 | (3 << 1) | 1;
985 brp_list[brp_i].used = 1;
986 brp_list[brp_i].value = (breakpoint->address & 0xFFFFFFFC);
987 brp_list[brp_i].control = control;
988 target_write_u32(target, OMAP3530_DEBUG_BASE
989 + CPUDBG_BVR_BASE + 4 * brp_list[brp_i].BRPn,
990 brp_list[brp_i].value);
991 target_write_u32(target, OMAP3530_DEBUG_BASE
992 + CPUDBG_BCR_BASE + 4 * brp_list[brp_i].BRPn,
993 brp_list[brp_i].control);
994 LOG_DEBUG("brp %i control 0x%0" PRIx32 " value 0x%0" PRIx32, brp_i,
995 brp_list[brp_i].control,
996 brp_list[brp_i].value);
997 }
998 else if (breakpoint->type == BKPT_SOFT)
999 {
1000 uint8_t code[4];
1001 if (breakpoint->length == 2)
1002 {
1003 buf_set_u32(code, 0, 32, ARMV5_T_BKPT(0x11));
1004 }
1005 else
1006 {
1007 buf_set_u32(code, 0, 32, ARMV5_BKPT(0x11));
1008 }
1009 retval = target->type->read_memory(target,
1010 breakpoint->address & 0xFFFFFFFE,
1011 breakpoint->length, 1,
1012 breakpoint->orig_instr);
1013 if (retval != ERROR_OK)
1014 return retval;
1015 retval = target->type->write_memory(target,
1016 breakpoint->address & 0xFFFFFFFE,
1017 breakpoint->length, 1, code);
1018 if (retval != ERROR_OK)
1019 return retval;
1020 breakpoint->set = 0x11; /* Any nice value but 0 */
1021 }
1022
1023 return ERROR_OK;
1024 }
1025
1026 int cortex_a8_unset_breakpoint(struct target_s *target, breakpoint_t *breakpoint)
1027 {
1028 int retval;
1029 /* get pointers to arch-specific information */
1030 armv4_5_common_t *armv4_5 = target->arch_info;
1031 armv7a_common_t *armv7a = armv4_5->arch_info;
1032 cortex_a8_common_t *cortex_a8 = armv7a->arch_info;
1033 cortex_a8_brp_t * brp_list = cortex_a8->brp_list;
1034
1035 if (!breakpoint->set)
1036 {
1037 LOG_WARNING("breakpoint not set");
1038 return ERROR_OK;
1039 }
1040
1041 if (breakpoint->type == BKPT_HARD)
1042 {
1043 int brp_i = breakpoint->set - 1;
1044 if ((brp_i < 0) || (brp_i >= cortex_a8->brp_num))
1045 {
1046 LOG_DEBUG("Invalid BRP number in breakpoint");
1047 return ERROR_OK;
1048 }
1049 LOG_DEBUG("rbp %i control 0x%0" PRIx32 " value 0x%0" PRIx32, brp_i,
1050 brp_list[brp_i].control, brp_list[brp_i].value);
1051 brp_list[brp_i].used = 0;
1052 brp_list[brp_i].value = 0;
1053 brp_list[brp_i].control = 0;
1054 target_write_u32(target, OMAP3530_DEBUG_BASE
1055 + CPUDBG_BCR_BASE + 4 * brp_list[brp_i].BRPn,
1056 brp_list[brp_i].control);
1057 target_write_u32(target, OMAP3530_DEBUG_BASE
1058 + CPUDBG_BVR_BASE + 4 * brp_list[brp_i].BRPn,
1059 brp_list[brp_i].value);
1060 }
1061 else
1062 {
1063 /* restore original instruction (kept in target endianness) */
1064 if (breakpoint->length == 4)
1065 {
1066 retval = target->type->write_memory(target,
1067 breakpoint->address & 0xFFFFFFFE,
1068 4, 1, breakpoint->orig_instr);
1069 if (retval != ERROR_OK)
1070 return retval;
1071 }
1072 else
1073 {
1074 retval = target->type->write_memory(target,
1075 breakpoint->address & 0xFFFFFFFE,
1076 2, 1, breakpoint->orig_instr);
1077 if (retval != ERROR_OK)
1078 return retval;
1079 }
1080 }
1081 breakpoint->set = 0;
1082
1083 return ERROR_OK;
1084 }
1085
1086 int cortex_a8_add_breakpoint(struct target_s *target, breakpoint_t *breakpoint)
1087 {
1088 /* get pointers to arch-specific information */
1089 armv4_5_common_t *armv4_5 = target->arch_info;
1090 armv7a_common_t *armv7a = armv4_5->arch_info;
1091 cortex_a8_common_t *cortex_a8 = armv7a->arch_info;
1092
1093 if ((breakpoint->type == BKPT_HARD) && (cortex_a8->brp_num_available < 1))
1094 {
1095 LOG_INFO("no hardware breakpoint available");
1096 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
1097 }
1098
1099 if (breakpoint->type == BKPT_HARD)
1100 cortex_a8->brp_num_available--;
1101 cortex_a8_set_breakpoint(target, breakpoint, 0x00); /* Exact match */
1102
1103 return ERROR_OK;
1104 }
1105
1106 int cortex_a8_remove_breakpoint(struct target_s *target, breakpoint_t *breakpoint)
1107 {
1108 /* get pointers to arch-specific information */
1109 armv4_5_common_t *armv4_5 = target->arch_info;
1110 armv7a_common_t *armv7a = armv4_5->arch_info;
1111 cortex_a8_common_t *cortex_a8 = armv7a->arch_info;
1112
1113 #if 0
1114 /* It is perfectly possible to remove brakpoints while the taget is running */
1115 if (target->state != TARGET_HALTED)
1116 {
1117 LOG_WARNING("target not halted");
1118 return ERROR_TARGET_NOT_HALTED;
1119 }
1120 #endif
1121
1122 if (breakpoint->set)
1123 {
1124 cortex_a8_unset_breakpoint(target, breakpoint);
1125 if (breakpoint->type == BKPT_HARD)
1126 cortex_a8->brp_num_available++ ;
1127 }
1128
1129
1130 return ERROR_OK;
1131 }
1132
1133
1134
1135 /*
1136 * Cortex-A8 Reset fuctions
1137 */
1138
1139
1140 /*
1141 * Cortex-A8 Memory access
1142 *
1143 * This is same Cortex M3 but we must also use the correct
1144 * ap number for every access.
1145 */
1146
1147 int cortex_a8_read_memory(struct target_s *target, uint32_t address,
1148 uint32_t size, uint32_t count, uint8_t *buffer)
1149 {
1150 /* get pointers to arch-specific information */
1151 armv4_5_common_t *armv4_5 = target->arch_info;
1152 armv7a_common_t *armv7a = armv4_5->arch_info;
1153 swjdp_common_t *swjdp = &armv7a->swjdp_info;
1154
1155 int retval = ERROR_OK;
1156
1157 /* sanitize arguments */
1158 if (((size != 4) && (size != 2) && (size != 1)) || (count == 0) || !(buffer))
1159 return ERROR_INVALID_ARGUMENTS;
1160
1161 /* cortex_a8 handles unaligned memory access */
1162
1163 // ??? dap_ap_select(swjdp, swjdp_memoryap);
1164
1165 switch (size)
1166 {
1167 case 4:
1168 retval = mem_ap_read_buf_u32(swjdp, buffer, 4 * count, address);
1169 break;
1170 case 2:
1171 retval = mem_ap_read_buf_u16(swjdp, buffer, 2 * count, address);
1172 break;
1173 case 1:
1174 retval = mem_ap_read_buf_u8(swjdp, buffer, count, address);
1175 break;
1176 default:
1177 LOG_ERROR("BUG: we shouldn't get here");
1178 exit(-1);
1179 }
1180
1181 return retval;
1182 }
1183
1184 int cortex_a8_write_memory(struct target_s *target, uint32_t address,
1185 uint32_t size, uint32_t count, uint8_t *buffer)
1186 {
1187 /* get pointers to arch-specific information */
1188 armv4_5_common_t *armv4_5 = target->arch_info;
1189 armv7a_common_t *armv7a = armv4_5->arch_info;
1190 swjdp_common_t *swjdp = &armv7a->swjdp_info;
1191
1192 int retval;
1193
1194 /* sanitize arguments */
1195 if (((size != 4) && (size != 2) && (size != 1)) || (count == 0) || !(buffer))
1196 return ERROR_INVALID_ARGUMENTS;
1197
1198 // ??? dap_ap_select(swjdp, swjdp_memoryap);
1199
1200 switch (size)
1201 {
1202 case 4:
1203 retval = mem_ap_write_buf_u32(swjdp, buffer, 4 * count, address);
1204 break;
1205 case 2:
1206 retval = mem_ap_write_buf_u16(swjdp, buffer, 2 * count, address);
1207 break;
1208 case 1:
1209 retval = mem_ap_write_buf_u8(swjdp, buffer, count, address);
1210 break;
1211 default:
1212 LOG_ERROR("BUG: we shouldn't get here");
1213 exit(-1);
1214 }
1215
1216 return retval;
1217 }
1218
1219 int cortex_a8_bulk_write_memory(target_t *target, uint32_t address,
1220 uint32_t count, uint8_t *buffer)
1221 {
1222 return cortex_a8_write_memory(target, address, 4, count, buffer);
1223 }
1224
1225
1226 int cortex_a8_dcc_read(swjdp_common_t *swjdp, uint8_t *value, uint8_t *ctrl)
1227 {
1228 #if 0
1229 u16 dcrdr;
1230
1231 mem_ap_read_buf_u16(swjdp, (uint8_t*)&dcrdr, 1, DCB_DCRDR);
1232 *ctrl = (uint8_t)dcrdr;
1233 *value = (uint8_t)(dcrdr >> 8);
1234
1235 LOG_DEBUG("data 0x%x ctrl 0x%x", *value, *ctrl);
1236
1237 /* write ack back to software dcc register
1238 * signify we have read data */
1239 if (dcrdr & (1 << 0))
1240 {
1241 dcrdr = 0;
1242 mem_ap_write_buf_u16(swjdp, (uint8_t*)&dcrdr, 1, DCB_DCRDR);
1243 }
1244 #endif
1245 return ERROR_OK;
1246 }
1247
1248
1249 int cortex_a8_handle_target_request(void *priv)
1250 {
1251 target_t *target = priv;
1252 if (!target->type->examined)
1253 return ERROR_OK;
1254 armv4_5_common_t *armv4_5 = target->arch_info;
1255 armv7a_common_t *armv7a = armv4_5->arch_info;
1256 swjdp_common_t *swjdp = &armv7a->swjdp_info;
1257
1258
1259 if (!target->dbg_msg_enabled)
1260 return ERROR_OK;
1261
1262 if (target->state == TARGET_RUNNING)
1263 {
1264 uint8_t data = 0;
1265 uint8_t ctrl = 0;
1266
1267 cortex_a8_dcc_read(swjdp, &data, &ctrl);
1268
1269 /* check if we have data */
1270 if (ctrl & (1 << 0))
1271 {
1272 uint32_t request;
1273
1274 /* we assume target is quick enough */
1275 request = data;
1276 cortex_a8_dcc_read(swjdp, &data, &ctrl);
1277 request |= (data << 8);
1278 cortex_a8_dcc_read(swjdp, &data, &ctrl);
1279 request |= (data << 16);
1280 cortex_a8_dcc_read(swjdp, &data, &ctrl);
1281 request |= (data << 24);
1282 target_request(target, request);
1283 }
1284 }
1285
1286 return ERROR_OK;
1287 }
1288
1289 /*
1290 * Cortex-A8 target information and configuration
1291 */
1292
1293 int cortex_a8_examine(struct target_s *target)
1294 {
1295 /* get pointers to arch-specific information */
1296 armv4_5_common_t *armv4_5 = target->arch_info;
1297 armv7a_common_t *armv7a = armv4_5->arch_info;
1298 cortex_a8_common_t *cortex_a8 = armv7a->arch_info;
1299 swjdp_common_t *swjdp = &armv7a->swjdp_info;
1300
1301
1302 int i;
1303 int retval = ERROR_OK;
1304 uint32_t didr, ctypr, ttypr, cpuid;
1305
1306 LOG_DEBUG("TODO");
1307
1308 /* We do one extra read to ensure DAP is configured,
1309 * we call ahbap_debugport_init(swjdp) instead
1310 */
1311 ahbap_debugport_init(swjdp);
1312 mem_ap_read_atomic_u32(swjdp, OMAP3530_DEBUG_BASE + CPUDBG_CPUID, &cpuid);
1313 if ((retval = mem_ap_read_atomic_u32(swjdp,
1314 OMAP3530_DEBUG_BASE + CPUDBG_CPUID, &cpuid)) != ERROR_OK)
1315 {
1316 LOG_DEBUG("Examine failed");
1317 return retval;
1318 }
1319
1320 if ((retval = mem_ap_read_atomic_u32(swjdp,
1321 OMAP3530_DEBUG_BASE + CPUDBG_CTYPR, &ctypr)) != ERROR_OK)
1322 {
1323 LOG_DEBUG("Examine failed");
1324 return retval;
1325 }
1326
1327 if ((retval = mem_ap_read_atomic_u32(swjdp,
1328 OMAP3530_DEBUG_BASE + CPUDBG_TTYPR, &ttypr)) != ERROR_OK)
1329 {
1330 LOG_DEBUG("Examine failed");
1331 return retval;
1332 }
1333
1334 if ((retval = mem_ap_read_atomic_u32(swjdp,
1335 OMAP3530_DEBUG_BASE + CPUDBG_DIDR, &didr)) != ERROR_OK)
1336 {
1337 LOG_DEBUG("Examine failed");
1338 return retval;
1339 }
1340
1341 LOG_DEBUG("cpuid = 0x%08" PRIx32, cpuid);
1342 LOG_DEBUG("ctypr = 0x%08" PRIx32, ctypr);
1343 LOG_DEBUG("ttypr = 0x%08" PRIx32, ttypr);
1344 LOG_DEBUG("didr = 0x%08" PRIx32, didr);
1345
1346 /* Setup Breakpoint Register Pairs */
1347 cortex_a8->brp_num = ((didr >> 24) & 0x0F) + 1;
1348 cortex_a8->brp_num_context = ((didr >> 20) & 0x0F) + 1;
1349 cortex_a8->brp_num_available = cortex_a8->brp_num;
1350 cortex_a8->brp_list = calloc(cortex_a8->brp_num, sizeof(cortex_a8_brp_t));
1351 // cortex_a8->brb_enabled = ????;
1352 for (i = 0; i < cortex_a8->brp_num; i++)
1353 {
1354 cortex_a8->brp_list[i].used = 0;
1355 if (i < (cortex_a8->brp_num-cortex_a8->brp_num_context))
1356 cortex_a8->brp_list[i].type = BRP_NORMAL;
1357 else
1358 cortex_a8->brp_list[i].type = BRP_CONTEXT;
1359 cortex_a8->brp_list[i].value = 0;
1360 cortex_a8->brp_list[i].control = 0;
1361 cortex_a8->brp_list[i].BRPn = i;
1362 }
1363
1364 /* Setup Watchpoint Register Pairs */
1365 cortex_a8->wrp_num = ((didr >> 28) & 0x0F) + 1;
1366 cortex_a8->wrp_num_available = cortex_a8->wrp_num;
1367 cortex_a8->wrp_list = calloc(cortex_a8->wrp_num, sizeof(cortex_a8_wrp_t));
1368 for (i = 0; i < cortex_a8->wrp_num; i++)
1369 {
1370 cortex_a8->wrp_list[i].used = 0;
1371 cortex_a8->wrp_list[i].type = 0;
1372 cortex_a8->wrp_list[i].value = 0;
1373 cortex_a8->wrp_list[i].control = 0;
1374 cortex_a8->wrp_list[i].WRPn = i;
1375 }
1376 LOG_DEBUG("Configured %i hw breakpoint pairs and %i hw watchpoint pairs",
1377 cortex_a8->brp_num , cortex_a8->wrp_num);
1378
1379 target->type->examined = 1;
1380
1381 return retval;
1382 }
1383
1384 /*
1385 * Cortex-A8 target creation and initialization
1386 */
1387
1388 void cortex_a8_build_reg_cache(target_t *target)
1389 {
1390 reg_cache_t **cache_p = register_get_last_cache_p(&target->reg_cache);
1391 /* get pointers to arch-specific information */
1392 armv4_5_common_t *armv4_5 = target->arch_info;
1393
1394 (*cache_p) = armv4_5_build_reg_cache(target, armv4_5);
1395 armv4_5->core_cache = (*cache_p);
1396 }
1397
1398
1399 int cortex_a8_init_target(struct command_context_s *cmd_ctx,
1400 struct target_s *target)
1401 {
1402 cortex_a8_build_reg_cache(target);
1403 return ERROR_OK;
1404 }
1405
1406 int cortex_a8_init_arch_info(target_t *target,
1407 cortex_a8_common_t *cortex_a8, jtag_tap_t *tap)
1408 {
1409 armv4_5_common_t *armv4_5;
1410 armv7a_common_t *armv7a;
1411
1412 armv7a = &cortex_a8->armv7a_common;
1413 armv4_5 = &armv7a->armv4_5_common;
1414 swjdp_common_t *swjdp = &armv7a->swjdp_info;
1415
1416 /* Setup cortex_a8_common_t */
1417 cortex_a8->common_magic = CORTEX_A8_COMMON_MAGIC;
1418 cortex_a8->arch_info = NULL;
1419 armv7a->arch_info = cortex_a8;
1420 armv4_5->arch_info = armv7a;
1421
1422 armv4_5_init_arch_info(target, armv4_5);
1423
1424 /* prepare JTAG information for the new target */
1425 cortex_a8->jtag_info.tap = tap;
1426 cortex_a8->jtag_info.scann_size = 4;
1427 LOG_DEBUG(" ");
1428 swjdp->dp_select_value = -1;
1429 swjdp->ap_csw_value = -1;
1430 swjdp->ap_tar_value = -1;
1431 swjdp->jtag_info = &cortex_a8->jtag_info;
1432 swjdp->memaccess_tck = 80;
1433
1434 /* Number of bits for tar autoincrement, impl. dep. at least 10 */
1435 swjdp->tar_autoincr_block = (1 << 10);
1436
1437 cortex_a8->fast_reg_read = 0;
1438
1439
1440 /* register arch-specific functions */
1441 armv7a->examine_debug_reason = NULL;
1442
1443 armv7a->pre_debug_entry = NULL;
1444 armv7a->post_debug_entry = cortex_a8_post_debug_entry;
1445
1446 armv7a->pre_restore_context = NULL;
1447 armv7a->post_restore_context = NULL;
1448 armv7a->armv4_5_mmu.armv4_5_cache.ctype = -1;
1449 // armv7a->armv4_5_mmu.get_ttb = armv7a_get_ttb;
1450 armv7a->armv4_5_mmu.read_memory = cortex_a8_read_memory;
1451 armv7a->armv4_5_mmu.write_memory = cortex_a8_write_memory;
1452 // armv7a->armv4_5_mmu.disable_mmu_caches = armv7a_disable_mmu_caches;
1453 // armv7a->armv4_5_mmu.enable_mmu_caches = armv7a_enable_mmu_caches;
1454 armv7a->armv4_5_mmu.has_tiny_pages = 1;
1455 armv7a->armv4_5_mmu.mmu_enabled = 0;
1456 armv7a->read_cp15 = cortex_a8_read_cp15;
1457 armv7a->write_cp15 = cortex_a8_write_cp15;
1458
1459
1460 // arm7_9->handle_target_request = cortex_a8_handle_target_request;
1461
1462 armv4_5->read_core_reg = cortex_a8_read_core_reg;
1463 armv4_5->write_core_reg = cortex_a8_write_core_reg;
1464 // armv4_5->full_context = arm7_9_full_context;
1465
1466 // armv4_5->load_core_reg_u32 = cortex_a8_load_core_reg_u32;
1467 // armv4_5->store_core_reg_u32 = cortex_a8_store_core_reg_u32;
1468 // armv4_5->read_core_reg = armv4_5_read_core_reg; /* this is default */
1469 // armv4_5->write_core_reg = armv4_5_write_core_reg;
1470
1471 target_register_timer_callback(cortex_a8_handle_target_request, 1, 1, target);
1472
1473 return ERROR_OK;
1474 }
1475
1476 int cortex_a8_target_create(struct target_s *target, Jim_Interp *interp)
1477 {
1478 cortex_a8_common_t *cortex_a8 = calloc(1, sizeof(cortex_a8_common_t));
1479
1480 cortex_a8_init_arch_info(target, cortex_a8, target->tap);
1481
1482 return ERROR_OK;
1483 }
1484
1485 static int cortex_a8_handle_cache_info_command(struct command_context_s *cmd_ctx,
1486 char *cmd, char **args, int argc)
1487 {
1488 target_t *target = get_current_target(cmd_ctx);
1489 armv4_5_common_t *armv4_5 = target->arch_info;
1490 armv7a_common_t *armv7a = armv4_5->arch_info;
1491
1492 return armv4_5_handle_cache_info_command(cmd_ctx,
1493 &armv7a->armv4_5_mmu.armv4_5_cache);
1494 }
1495
1496
1497 int cortex_a8_register_commands(struct command_context_s *cmd_ctx)
1498 {
1499 command_t *cortex_a8_cmd;
1500 int retval = ERROR_OK;
1501
1502 armv4_5_register_commands(cmd_ctx);
1503 armv7a_register_commands(cmd_ctx);
1504
1505 cortex_a8_cmd = register_command(cmd_ctx, NULL, "cortex_a8",
1506 NULL, COMMAND_ANY,
1507 "cortex_a8 specific commands");
1508
1509 register_command(cmd_ctx, cortex_a8_cmd, "cache_info",
1510 cortex_a8_handle_cache_info_command, COMMAND_EXEC,
1511 "display information about target caches");
1512
1513 return retval;
1514 }
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