1 /***************************************************************************
2 * Copyright (C) 2005 by Dominic Rath *
3 * Dominic.Rath@gmx.de *
5 * Copyright (C) 2006 by Magnus Lundin *
8 * This program is free software; you can redistribute it and/or modify *
9 * it under the terms of the GNU General Public License as published by *
10 * the Free Software Foundation; either version 2 of the License, or *
11 * (at your option) any later version. *
13 * This program is distributed in the hope that it will be useful, *
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
16 * GNU General Public License for more details. *
18 * You should have received a copy of the GNU General Public License *
19 * along with this program; if not, write to the *
20 * Free Software Foundation, Inc., *
21 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
22 ***************************************************************************/
27 #include "replacements.h"
29 #include "cortex_m3.h"
34 #include "target_request.h"
43 int cortex_m3_register_commands(struct command_context_s *cmd_ctx);
45 /* forward declarations */
46 void cortex_m3_enable_breakpoints(struct target_s *target);
47 void cortex_m3_enable_watchpoints(struct target_s *target);
48 int cortex_m3_target_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc, struct target_s *target);
49 int cortex_m3_init_target(struct command_context_s *cmd_ctx, struct target_s *target);
51 int cortex_m3_load_core_reg_u32(target_t *target, enum armv7m_regtype type, u32 num, u32 *value);
52 int cortex_m3_store_core_reg_u32(target_t *target, enum armv7m_regtype type, u32 num, u32 value);
53 int cortex_m3_target_request_data(target_t *target, u32 size, u8 *buffer);
54 int cortex_m3_examine(struct command_context_s *cmd_ctx, struct target_s *target);
56 #ifdef ARMV7_GDB_HACKS
57 extern u8 armv7m_gdb_dummy_cpsr_value[];
58 extern reg_t armv7m_gdb_dummy_cpsr_reg;
61 target_type_t cortexm3_target =
65 .poll = cortex_m3_poll,
66 .arch_state = armv7m_arch_state,
68 .target_request_data = cortex_m3_target_request_data,
70 .halt = cortex_m3_halt,
71 .resume = cortex_m3_resume,
72 .step = cortex_m3_step,
74 .assert_reset = cortex_m3_assert_reset,
75 .deassert_reset = cortex_m3_deassert_reset,
76 .soft_reset_halt = cortex_m3_soft_reset_halt,
78 .get_gdb_reg_list = armv7m_get_gdb_reg_list,
80 .read_memory = cortex_m3_read_memory,
81 .write_memory = cortex_m3_write_memory,
82 .bulk_write_memory = cortex_m3_bulk_write_memory,
83 .checksum_memory = armv7m_checksum_memory,
85 .run_algorithm = armv7m_run_algorithm,
87 .add_breakpoint = cortex_m3_add_breakpoint,
88 .remove_breakpoint = cortex_m3_remove_breakpoint,
89 .add_watchpoint = cortex_m3_add_watchpoint,
90 .remove_watchpoint = cortex_m3_remove_watchpoint,
92 .register_commands = cortex_m3_register_commands,
93 .target_command = cortex_m3_target_command,
94 .init_target = cortex_m3_init_target,
95 .examine = cortex_m3_examine,
96 .quit = cortex_m3_quit
99 int cortex_m3_clear_halt(target_t *target)
101 /* get pointers to arch-specific information */
102 armv7m_common_t *armv7m = target->arch_info;
103 cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
104 swjdp_common_t *swjdp = &cortex_m3->swjdp_info;
106 /* Read Debug Fault Status Register */
107 ahbap_read_system_atomic_u32(swjdp, NVIC_DFSR, &cortex_m3->nvic_dfsr);
108 /* Write Debug Fault Status Register to enable processing to resume ?? Try with and without this !! */
109 ahbap_write_system_atomic_u32(swjdp, NVIC_DFSR, cortex_m3->nvic_dfsr);
110 LOG_DEBUG(" NVIC_DFSR 0x%x", cortex_m3->nvic_dfsr);
115 int cortex_m3_single_step_core(target_t *target)
117 /* get pointers to arch-specific information */
118 armv7m_common_t *armv7m = target->arch_info;
119 cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
120 swjdp_common_t *swjdp = &cortex_m3->swjdp_info;
122 if (!(cortex_m3->dcb_dhcsr & C_MASKINTS))
123 ahbap_write_system_atomic_u32(swjdp, DCB_DHCSR, DBGKEY | C_MASKINTS | C_HALT | C_DEBUGEN );
124 ahbap_write_system_atomic_u32(swjdp, DCB_DHCSR, DBGKEY | C_MASKINTS | C_STEP | C_DEBUGEN );
125 cortex_m3->dcb_dhcsr |= C_MASKINTS;
127 cortex_m3_clear_halt(target);
132 int cortex_m3_exec_opcode(target_t *target,u32 opcode, int len /* MODE, r0_invalue, &r0_outvalue */ )
134 /* get pointers to arch-specific information */
135 armv7m_common_t *armv7m = target->arch_info;
136 cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
137 swjdp_common_t *swjdp = &cortex_m3->swjdp_info;
141 ahbap_read_system_u32(swjdp, 0x20000000, &savedram);
142 ahbap_write_system_u32(swjdp, 0x20000000, opcode);
143 ahbap_write_coreregister_u32(swjdp, 0x20000000, 15);
144 cortex_m3_single_step_core(target);
145 armv7m->core_cache->reg_list[15].dirty = armv7m->core_cache->reg_list[15].valid;
146 retvalue = ahbap_write_system_atomic_u32(swjdp, 0x20000000, savedram);
152 /* Enable interrupts */
153 int cortex_m3_cpsie(target_t *target, u32 IF)
155 return cortex_m3_exec_opcode(target, ARMV7M_T_CPSIE(IF), 2);
158 /* Disable interrupts */
159 int cortex_m3_cpsid(target_t *target, u32 IF)
161 return cortex_m3_exec_opcode(target, ARMV7M_T_CPSID(IF), 2);
165 int cortex_m3_endreset_event(target_t *target)
170 /* get pointers to arch-specific information */
171 armv7m_common_t *armv7m = target->arch_info;
172 cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
173 swjdp_common_t *swjdp = &cortex_m3->swjdp_info;
174 cortex_m3_fp_comparator_t *fp_list = cortex_m3->fp_comparator_list;
175 cortex_m3_dwt_comparator_t *dwt_list = cortex_m3->dwt_comparator_list;
177 ahbap_read_system_atomic_u32(swjdp, DCB_DEMCR, &dcb_demcr);
178 LOG_DEBUG("DCB_DEMCR = 0x%8.8x",dcb_demcr);
180 ahbap_write_system_u32(swjdp, DCB_DCRDR, 0 );
182 /* Enable debug requests */
183 ahbap_read_system_atomic_u32(swjdp, DCB_DHCSR, &cortex_m3->dcb_dhcsr);
184 if (!(cortex_m3->dcb_dhcsr & C_DEBUGEN))
185 ahbap_write_system_u32(swjdp, DCB_DHCSR, DBGKEY | C_DEBUGEN );
186 /* Enable trace and dwt */
187 ahbap_write_system_u32(swjdp, DCB_DEMCR, TRCENA | VC_HARDERR | VC_BUSERR );
188 /* Monitor bus faults */
189 ahbap_write_system_u32(swjdp, NVIC_SHCSR, SHCSR_BUSFAULTENA );
192 target_write_u32(target, FP_CTRL, 3);
194 /* Restore FPB registers */
195 for (i = 0; i < cortex_m3->fp_num_code + cortex_m3->fp_num_lit; i++)
197 target_write_u32(target, fp_list[i].fpcr_address, fp_list[i].fpcr_value);
200 /* Restore DWT registers */
201 for (i = 0; i < cortex_m3->dwt_num_comp; i++)
203 target_write_u32(target, dwt_list[i].dwt_comparator_address, dwt_list[i].comp);
204 target_write_u32(target, dwt_list[i].dwt_comparator_address | 0x4, dwt_list[i].mask);
205 target_write_u32(target, dwt_list[i].dwt_comparator_address | 0x8, dwt_list[i].function);
207 swjdp_transaction_endcheck(swjdp);
209 armv7m_invalidate_core_regs(target);
213 int cortex_m3_examine_debug_reason(target_t *target)
215 /* get pointers to arch-specific information */
216 armv7m_common_t *armv7m = target->arch_info;
217 cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
219 /* THIS IS NOT GOOD, TODO - better logic for detection of debug state reason */
220 /* only check the debug reason if we don't know it already */
222 if ((target->debug_reason != DBG_REASON_DBGRQ)
223 && (target->debug_reason != DBG_REASON_SINGLESTEP))
227 if (cortex_m3->nvic_dfsr & DFSR_BKPT)
229 target->debug_reason = DBG_REASON_BREAKPOINT;
230 if (cortex_m3->nvic_dfsr & DFSR_DWTTRAP)
231 target->debug_reason = DBG_REASON_WPTANDBKPT;
233 else if (cortex_m3->nvic_dfsr & DFSR_DWTTRAP)
234 target->debug_reason = DBG_REASON_WATCHPOINT;
240 int cortex_m3_examine_exception_reason(target_t *target)
242 u32 shcsr, except_sr, cfsr = -1, except_ar = -1;
244 /* get pointers to arch-specific information */
245 armv7m_common_t *armv7m = target->arch_info;
246 cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
247 swjdp_common_t *swjdp = &cortex_m3->swjdp_info;
249 ahbap_read_system_u32(swjdp, NVIC_SHCSR, &shcsr);
250 switch (armv7m->exception_number)
254 case 3: /* Hard Fault */
255 ahbap_read_system_atomic_u32(swjdp, NVIC_HFSR, &except_sr);
256 if (except_sr & 0x40000000)
258 ahbap_read_system_u32(swjdp, NVIC_CFSR, &cfsr);
261 case 4: /* Memory Management */
262 ahbap_read_system_u32(swjdp, NVIC_CFSR, &except_sr);
263 ahbap_read_system_u32(swjdp, NVIC_MMFAR, &except_ar);
265 case 5: /* Bus Fault */
266 ahbap_read_system_u32(swjdp, NVIC_CFSR, &except_sr);
267 ahbap_read_system_u32(swjdp, NVIC_BFAR, &except_ar);
269 case 6: /* Usage Fault */
270 ahbap_read_system_u32(swjdp, NVIC_CFSR, &except_sr);
272 case 11: /* SVCall */
274 case 12: /* Debug Monitor */
275 ahbap_read_system_u32(swjdp, NVIC_DFSR, &except_sr);
277 case 14: /* PendSV */
279 case 15: /* SysTick */
285 swjdp_transaction_endcheck(swjdp);
286 LOG_DEBUG("%s SHCSR 0x%x, SR 0x%x, CFSR 0x%x, AR 0x%x", armv7m_exception_string(armv7m->exception_number), \
287 shcsr, except_sr, cfsr, except_ar);
291 int cortex_m3_debug_entry(target_t *target)
297 /* get pointers to arch-specific information */
298 armv7m_common_t *armv7m = target->arch_info;
299 cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
300 swjdp_common_t *swjdp = &cortex_m3->swjdp_info;
303 if (armv7m->pre_debug_entry)
304 armv7m->pre_debug_entry(target);
306 cortex_m3_clear_halt(target);
307 ahbap_read_system_atomic_u32(swjdp, DCB_DHCSR, &cortex_m3->dcb_dhcsr);
309 if ((retval = armv7m->examine_debug_reason(target)) != ERROR_OK)
312 /* Examine target state and mode */
313 /* First load register acessible through core debug port*/
314 for (i = 0; i < ARMV7M_PRIMASK; i++)
316 if (!armv7m->core_cache->reg_list[i].valid)
317 armv7m->read_core_reg(target, i);
320 xPSR = buf_get_u32(armv7m->core_cache->reg_list[ARMV7M_xPSR].value, 0, 32);
322 #ifdef ARMV7_GDB_HACKS
323 /* copy real xpsr reg for gdb, setting thumb bit */
324 buf_set_u32(armv7m_gdb_dummy_cpsr_value, 0, 32, xPSR);
325 buf_set_u32(armv7m_gdb_dummy_cpsr_value, 5, 1, 1);
326 armv7m_gdb_dummy_cpsr_reg.valid = armv7m->core_cache->reg_list[ARMV7M_xPSR].valid;
327 armv7m_gdb_dummy_cpsr_reg.dirty = armv7m->core_cache->reg_list[ARMV7M_xPSR].dirty;
330 /* For IT instructions xPSR must be reloaded on resume and clear on debug exec */
333 armv7m->core_cache->reg_list[ARMV7M_xPSR].dirty = armv7m->core_cache->reg_list[ARMV7M_xPSR].valid;
334 cortex_m3_store_core_reg_u32(target, ARMV7M_REGISTER_CORE_GP, 16, xPSR &~ 0xff);
337 /* Now we can load SP core registers */
338 for (i = ARMV7M_PRIMASK; i < ARMV7NUMCOREREGS; i++)
340 if (!armv7m->core_cache->reg_list[i].valid)
341 armv7m->read_core_reg(target, i);
344 /* Are we in an exception handler */
347 armv7m->core_mode = ARMV7M_MODE_HANDLER;
348 armv7m->exception_number = (xPSR & 0x1FF);
352 armv7m->core_mode = buf_get_u32(armv7m->core_cache->reg_list[ARMV7M_CONTROL].value, 0, 1);
353 armv7m->exception_number = 0;
356 if (armv7m->exception_number)
358 cortex_m3_examine_exception_reason(target);
361 LOG_DEBUG("entered debug state in core mode: %s at PC 0x%x, target->state: %s", armv7m_mode_strings[armv7m->core_mode], \
362 *(u32*)(armv7m->core_cache->reg_list[15].value), target_state_strings[target->state]);
364 if (armv7m->post_debug_entry)
365 armv7m->post_debug_entry(target);
370 int cortex_m3_poll(target_t *target)
373 u32 prev_target_state = target->state;
375 /* get pointers to arch-specific information */
376 armv7m_common_t *armv7m = target->arch_info;
377 cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
378 swjdp_common_t *swjdp = &cortex_m3->swjdp_info;
380 /* Read from Debug Halting Control and Status Register */
381 retval = ahbap_read_system_atomic_u32(swjdp, DCB_DHCSR, &cortex_m3->dcb_dhcsr);
382 if (retval != ERROR_OK)
384 target->state = TARGET_UNKNOWN;
388 if (cortex_m3->dcb_dhcsr & S_RESET_ST)
390 /* check if still in reset */
391 ahbap_read_system_atomic_u32(swjdp, DCB_DHCSR, &cortex_m3->dcb_dhcsr);
393 if (cortex_m3->dcb_dhcsr & S_RESET_ST)
395 target->state = TARGET_RESET;
400 if (target->state == TARGET_RESET)
402 /* Cannot switch context while running so endreset is called with target->state == TARGET_RESET */
403 LOG_DEBUG("Exit from reset with dcb_dhcsr 0x%x", cortex_m3->dcb_dhcsr);
404 cortex_m3_endreset_event(target);
405 target->state = TARGET_RUNNING;
406 prev_target_state = TARGET_RUNNING;
409 if (cortex_m3->dcb_dhcsr & S_HALT)
411 target->state = TARGET_HALTED;
413 if ((prev_target_state == TARGET_RUNNING) || (prev_target_state == TARGET_RESET))
415 if ((retval = cortex_m3_debug_entry(target)) != ERROR_OK)
418 target_call_event_callbacks(target, TARGET_EVENT_HALTED);
420 if (prev_target_state == TARGET_DEBUG_RUNNING)
423 if ((retval = cortex_m3_debug_entry(target)) != ERROR_OK)
426 target_call_event_callbacks(target, TARGET_EVENT_DEBUG_HALTED);
431 if (cortex_m3->dcb_dhcsr & S_SLEEP)
432 target->state = TARGET_SLEEP;
436 /* Read Debug Fault Status Register, added to figure out the lockup when running flashtest.script */
437 ahbap_read_system_atomic_u32(swjdp, NVIC_DFSR, &cortex_m3->nvic_dfsr);
438 LOG_DEBUG("dcb_dhcsr 0x%x, nvic_dfsr 0x%x, target->state: %s", cortex_m3->dcb_dhcsr, cortex_m3->nvic_dfsr, target_state_strings[target->state]);
444 int cortex_m3_halt(target_t *target)
446 /* get pointers to arch-specific information */
447 armv7m_common_t *armv7m = target->arch_info;
448 cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
449 swjdp_common_t *swjdp = &cortex_m3->swjdp_info;
451 LOG_DEBUG("target->state: %s", target_state_strings[target->state]);
453 if (target->state == TARGET_HALTED)
455 LOG_DEBUG("target was already halted");
459 if (target->state == TARGET_UNKNOWN)
461 LOG_WARNING("target was in unknown state when halt was requested");
464 if (target->state == TARGET_RESET)
466 if ((jtag_reset_config & RESET_SRST_PULLS_TRST) && jtag_srst)
468 LOG_ERROR("can't request a halt while in reset if nSRST pulls nTRST");
469 return ERROR_TARGET_FAILURE;
473 /* we came here in a reset_halt or reset_init sequence
474 * debug entry was already prepared in cortex_m3_prepare_reset_halt()
476 target->debug_reason = DBG_REASON_DBGRQ;
482 /* Write to Debug Halting Control and Status Register */
483 ahbap_write_system_atomic_u32(swjdp, DCB_DHCSR, DBGKEY | C_DEBUGEN | C_HALT );
485 target->debug_reason = DBG_REASON_DBGRQ;
490 int cortex_m3_soft_reset_halt(struct target_s *target)
492 /* get pointers to arch-specific information */
493 armv7m_common_t *armv7m = target->arch_info;
494 cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
495 swjdp_common_t *swjdp = &cortex_m3->swjdp_info;
497 int retval, timeout = 0;
499 /* Enter debug state on reset, cf. end_reset_event() */
500 ahbap_write_system_u32(swjdp, DCB_DEMCR, TRCENA | VC_HARDERR | VC_BUSERR | VC_CORERESET );
502 /* Request a reset */
503 ahbap_write_system_atomic_u32(swjdp, NVIC_AIRCR, AIRCR_VECTKEY | AIRCR_VECTRESET );
504 target->state = TARGET_RESET;
506 /* registers are now invalid */
507 armv7m_invalidate_core_regs(target);
509 while (timeout < 100)
511 retval = ahbap_read_system_atomic_u32(swjdp, DCB_DHCSR, &dcb_dhcsr);
512 if (retval == ERROR_OK)
514 ahbap_read_system_atomic_u32(swjdp, NVIC_DFSR, &cortex_m3->nvic_dfsr);
515 if ((dcb_dhcsr & S_HALT) && (cortex_m3->nvic_dfsr & DFSR_VCATCH))
517 LOG_DEBUG("system reset-halted, dcb_dhcsr 0x%x, nvic_dfsr 0x%x", dcb_dhcsr, cortex_m3->nvic_dfsr);
518 cortex_m3_poll(target);
522 LOG_DEBUG("waiting for system reset-halt, dcb_dhcsr 0x%x, %i ms", dcb_dhcsr, timeout);
531 int cortex_m3_resume(struct target_s *target, int current, u32 address, int handle_breakpoints, int debug_execution)
533 /* get pointers to arch-specific information */
534 armv7m_common_t *armv7m = target->arch_info;
535 cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
536 swjdp_common_t *swjdp = &cortex_m3->swjdp_info;
537 breakpoint_t *breakpoint = NULL;
538 u32 dcb_dhcsr, resume_pc;
540 if (target->state != TARGET_HALTED)
542 LOG_WARNING("target not halted");
543 return ERROR_TARGET_NOT_HALTED;
546 if (!debug_execution)
548 target_free_all_working_areas(target);
549 cortex_m3_enable_breakpoints(target);
550 cortex_m3_enable_watchpoints(target);
552 /* TODOLATER Interrupt handling/disable for debug execution, cache ... ... */
555 dcb_dhcsr = DBGKEY | C_DEBUGEN;
558 /* Disable interrupts */
560 We disable interrupts in the PRIMASK register instead of masking with C_MASKINTS,
561 This is probably the same inssue as Cortex-M3 Errata 377493:
562 C_MASKINTS in parallel with disabled interrupts can cause local faults to not be taken.
564 buf_set_u32(armv7m->core_cache->reg_list[ARMV7M_PRIMASK].value, 0, 32, 1);
565 /* Make sure we are in Thumb mode */
566 buf_set_u32(armv7m->core_cache->reg_list[ARMV7M_xPSR].value, 0, 32,
567 buf_get_u32(armv7m->core_cache->reg_list[ARMV7M_xPSR].value, 0, 32) | (1<<24));
570 /* current = 1: continue on current pc, otherwise continue at <address> */
573 buf_set_u32(armv7m->core_cache->reg_list[15].value, 0, 32, address);
574 armv7m->core_cache->reg_list[15].dirty = 1;
575 armv7m->core_cache->reg_list[15].valid = 1;
578 resume_pc = buf_get_u32(armv7m->core_cache->reg_list[15].value, 0, 32);
580 armv7m_restore_context(target);
582 /* the front-end may request us not to handle breakpoints */
583 if (handle_breakpoints)
585 /* Single step past breakpoint at current address */
586 if ((breakpoint = breakpoint_find(target, resume_pc)))
588 LOG_DEBUG("unset breakpoint at 0x%8.8x", breakpoint->address);
589 cortex_m3_unset_breakpoint(target, breakpoint);
590 cortex_m3_single_step_core(target);
591 cortex_m3_set_breakpoint(target, breakpoint);
595 /* Set/Clear C_MASKINTS in a separate operation */
596 if ((cortex_m3->dcb_dhcsr & C_MASKINTS) != (dcb_dhcsr & C_MASKINTS))
597 ahbap_write_system_atomic_u32(swjdp, DCB_DHCSR, dcb_dhcsr | C_HALT );
600 ahbap_write_system_atomic_u32(swjdp, DCB_DHCSR, dcb_dhcsr );
601 target->debug_reason = DBG_REASON_NOTHALTED;
603 /* registers are now invalid */
604 armv7m_invalidate_core_regs(target);
605 if (!debug_execution)
607 target->state = TARGET_RUNNING;
608 target_call_event_callbacks(target, TARGET_EVENT_RESUMED);
609 LOG_DEBUG("target resumed at 0x%x",resume_pc);
613 target->state = TARGET_DEBUG_RUNNING;
614 target_call_event_callbacks(target, TARGET_EVENT_DEBUG_RESUMED);
615 LOG_DEBUG("target debug resumed at 0x%x",resume_pc);
621 /* int irqstepcount=0; */
622 int cortex_m3_step(struct target_s *target, int current, u32 address, int handle_breakpoints)
624 /* get pointers to arch-specific information */
625 armv7m_common_t *armv7m = target->arch_info;
626 cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
627 swjdp_common_t *swjdp = &cortex_m3->swjdp_info;
628 breakpoint_t *breakpoint = NULL;
630 if (target->state != TARGET_HALTED)
632 LOG_WARNING("target not halted");
633 return ERROR_TARGET_NOT_HALTED;
636 /* current = 1: continue on current pc, otherwise continue at <address> */
638 buf_set_u32(armv7m->core_cache->reg_list[15].value, 0, 32, address);
640 /* the front-end may request us not to handle breakpoints */
641 if (handle_breakpoints)
642 if ((breakpoint = breakpoint_find(target, buf_get_u32(armv7m->core_cache->reg_list[15].value, 0, 32))))
643 cortex_m3_unset_breakpoint(target, breakpoint);
645 target->debug_reason = DBG_REASON_SINGLESTEP;
647 armv7m_restore_context(target);
649 target_call_event_callbacks(target, TARGET_EVENT_RESUMED);
651 if (cortex_m3->dcb_dhcsr & C_MASKINTS)
652 ahbap_write_system_atomic_u32(swjdp, DCB_DHCSR, DBGKEY | C_HALT | C_DEBUGEN );
653 ahbap_write_system_atomic_u32(swjdp, DCB_DHCSR, DBGKEY| C_STEP | C_DEBUGEN);
654 ahbap_read_system_atomic_u32(swjdp, DCB_DHCSR, &cortex_m3->dcb_dhcsr);
656 /* registers are now invalid */
657 armv7m_invalidate_core_regs(target);
660 cortex_m3_set_breakpoint(target, breakpoint);
662 LOG_DEBUG("target stepped dcb_dhcsr = 0x%x nvic_icsr = 0x%x", cortex_m3->dcb_dhcsr, cortex_m3->nvic_icsr);
664 cortex_m3_debug_entry(target);
665 target_call_event_callbacks(target, TARGET_EVENT_HALTED);
667 LOG_DEBUG("target stepped dcb_dhcsr = 0x%x nvic_icsr = 0x%x", cortex_m3->dcb_dhcsr, cortex_m3->nvic_icsr);
671 int cortex_m3_assert_reset(target_t *target)
673 armv7m_common_t *armv7m = target->arch_info;
674 cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
675 swjdp_common_t *swjdp = &cortex_m3->swjdp_info;
678 LOG_DEBUG("target->state: %s", target_state_strings[target->state]);
680 if (!(jtag_reset_config & RESET_HAS_SRST))
682 LOG_ERROR("Can't assert SRST");
686 /* Enable debug requests */
687 ahbap_read_system_atomic_u32(swjdp, DCB_DHCSR, &cortex_m3->dcb_dhcsr);
688 if (!(cortex_m3->dcb_dhcsr & C_DEBUGEN))
689 ahbap_write_system_u32(swjdp, DCB_DHCSR, DBGKEY | C_DEBUGEN );
691 ahbap_write_system_u32(swjdp, DCB_DCRDR, 0 );
693 if (target->reset_mode == RESET_RUN)
695 /* Set/Clear C_MASKINTS in a separate operation */
696 if (cortex_m3->dcb_dhcsr & C_MASKINTS)
697 ahbap_write_system_atomic_u32(swjdp, DCB_DHCSR, DBGKEY | C_DEBUGEN | C_HALT );
699 cortex_m3_clear_halt(target);
701 /* Enter debug state on reset, cf. end_reset_event() */
702 ahbap_write_system_u32(swjdp, DCB_DEMCR, TRCENA | VC_HARDERR | VC_BUSERR);
706 /* Enter debug state on reset, cf. end_reset_event() */
707 ahbap_write_system_atomic_u32(swjdp, DCB_DEMCR, TRCENA | VC_HARDERR | VC_BUSERR | VC_CORERESET );
710 /* following hack is to handle luminary reset
711 * when srst is asserted the luminary device seesm to also clear the debug registers
712 * which does not match the armv7 debug TRM */
714 if (strcmp(cortex_m3->variant, "lm3s") == 0)
716 /* get revision of lm3s target, only early silicon has this issue
717 * Fury Rev B, DustDevil Rev B, Tempest all ok */
721 if (target_read_u32(target, 0x400fe000, &did0) == ERROR_OK)
723 switch ((did0 >> 16) & 0xff)
726 /* all Sandstorm suffer issue */
732 /* only Fury/DustDevil rev A suffer reset problems */
733 if (((did0 >> 8) & 0xff) == 0)
742 /* default to asserting srst */
743 if (jtag_reset_config & RESET_SRST_PULLS_TRST)
745 jtag_add_reset(1, 1);
749 jtag_add_reset(0, 1);
754 /* this causes the luminary device to reset using the watchdog */
755 ahbap_write_system_atomic_u32(swjdp, NVIC_AIRCR, AIRCR_VECTKEY | AIRCR_SYSRESETREQ );
756 LOG_DEBUG("Using Luminary Reset: SYSRESETREQ");
759 target->state = TARGET_RESET;
760 jtag_add_sleep(50000);
762 armv7m_invalidate_core_regs(target);
767 int cortex_m3_deassert_reset(target_t *target)
769 LOG_DEBUG("target->state: %s", target_state_strings[target->state]);
771 /* deassert reset lines */
772 jtag_add_reset(0, 0);
777 void cortex_m3_enable_breakpoints(struct target_s *target)
779 breakpoint_t *breakpoint = target->breakpoints;
781 /* set any pending breakpoints */
784 if (breakpoint->set == 0)
785 cortex_m3_set_breakpoint(target, breakpoint);
786 breakpoint = breakpoint->next;
790 int cortex_m3_set_breakpoint(struct target_s *target, breakpoint_t *breakpoint)
795 /* get pointers to arch-specific information */
796 armv7m_common_t *armv7m = target->arch_info;
797 cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
799 cortex_m3_fp_comparator_t * comparator_list = cortex_m3->fp_comparator_list;
803 LOG_WARNING("breakpoint already set");
807 if (cortex_m3->auto_bp_type)
809 breakpoint->type = (breakpoint->address < 0x20000000) ? BKPT_HARD : BKPT_SOFT;
812 if (breakpoint->type == BKPT_HARD)
814 while(comparator_list[fp_num].used && (fp_num < cortex_m3->fp_num_code))
816 if (fp_num >= cortex_m3->fp_num_code)
818 LOG_DEBUG("ERROR Can not find free FP Comparator");
819 LOG_WARNING("ERROR Can not find free FP Comparator");
822 breakpoint->set = fp_num + 1;
823 hilo = (breakpoint->address & 0x2) ? FPCR_REPLACE_BKPT_HIGH : FPCR_REPLACE_BKPT_LOW;
824 comparator_list[fp_num].used = 1;
825 comparator_list[fp_num].fpcr_value = (breakpoint->address & 0x1FFFFFFC) | hilo | 1;
826 target_write_u32(target, comparator_list[fp_num].fpcr_address, comparator_list[fp_num].fpcr_value);
827 LOG_DEBUG("fpc_num %i fpcr_value 0x%x", fp_num, comparator_list[fp_num].fpcr_value);
829 else if (breakpoint->type == BKPT_SOFT)
832 buf_set_u32(code, 0, 32, ARMV7M_T_BKPT(0x11));
833 target->type->read_memory(target, breakpoint->address & 0xFFFFFFFE, breakpoint->length, 1, breakpoint->orig_instr);
834 target->type->write_memory(target, breakpoint->address & 0xFFFFFFFE, breakpoint->length, 1, code);
835 breakpoint->set = 0x11; /* Any nice value but 0 */
841 int cortex_m3_unset_breakpoint(struct target_s *target, breakpoint_t *breakpoint)
843 /* get pointers to arch-specific information */
844 armv7m_common_t *armv7m = target->arch_info;
845 cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
846 cortex_m3_fp_comparator_t * comparator_list = cortex_m3->fp_comparator_list;
848 if (!breakpoint->set)
850 LOG_WARNING("breakpoint not set");
854 if (breakpoint->type == BKPT_HARD)
856 int fp_num = breakpoint->set - 1;
857 if ((fp_num < 0) || (fp_num >= cortex_m3->fp_num_code))
859 LOG_DEBUG("Invalid FP Comparator number in breakpoint");
862 comparator_list[fp_num].used = 0;
863 comparator_list[fp_num].fpcr_value = 0;
864 target_write_u32(target, comparator_list[fp_num].fpcr_address, comparator_list[fp_num].fpcr_value);
868 /* restore original instruction (kept in target endianness) */
869 if (breakpoint->length == 4)
871 target->type->write_memory(target, breakpoint->address & 0xFFFFFFFE, 4, 1, breakpoint->orig_instr);
875 target->type->write_memory(target, breakpoint->address & 0xFFFFFFFE, 2, 1, breakpoint->orig_instr);
883 int cortex_m3_add_breakpoint(struct target_s *target, breakpoint_t *breakpoint)
885 /* get pointers to arch-specific information */
886 armv7m_common_t *armv7m = target->arch_info;
887 cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
889 if (cortex_m3->auto_bp_type)
891 breakpoint->type = (breakpoint->address < 0x20000000) ? BKPT_HARD : BKPT_SOFT;
892 #ifdef ARMV7_GDB_HACKS
893 if (breakpoint->length != 2) {
894 /* XXX Hack: Replace all breakpoints with length != 2 with
895 * a hardware breakpoint. */
896 breakpoint->type = BKPT_HARD;
897 breakpoint->length = 2;
902 if ((breakpoint->type == BKPT_HARD) && (breakpoint->address >= 0x20000000))
904 LOG_INFO("flash patch comparator requested outside code memory region");
905 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
908 if ((breakpoint->type == BKPT_SOFT) && (breakpoint->address < 0x20000000))
910 LOG_INFO("soft breakpoint requested in code (flash) memory region");
911 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
914 if ((breakpoint->type == BKPT_HARD) && (cortex_m3->fp_code_available < 1))
916 LOG_INFO("no flash patch comparator unit available for hardware breakpoint");
917 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
920 if ((breakpoint->length != 2))
922 LOG_INFO("only breakpoints of two bytes length supported");
923 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
926 if (breakpoint->type == BKPT_HARD)
927 cortex_m3->fp_code_available--;
928 cortex_m3_set_breakpoint(target, breakpoint);
933 int cortex_m3_remove_breakpoint(struct target_s *target, breakpoint_t *breakpoint)
935 /* get pointers to arch-specific information */
936 armv7m_common_t *armv7m = target->arch_info;
937 cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
939 if (target->state != TARGET_HALTED)
941 LOG_WARNING("target not halted");
942 return ERROR_TARGET_NOT_HALTED;
945 if (cortex_m3->auto_bp_type)
947 breakpoint->type = (breakpoint->address < 0x20000000) ? BKPT_HARD : BKPT_SOFT;
952 cortex_m3_unset_breakpoint(target, breakpoint);
955 if (breakpoint->type == BKPT_HARD)
956 cortex_m3->fp_code_available++;
961 int cortex_m3_set_watchpoint(struct target_s *target, watchpoint_t *watchpoint)
966 /* get pointers to arch-specific information */
967 armv7m_common_t *armv7m = target->arch_info;
968 cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
969 cortex_m3_dwt_comparator_t * comparator_list = cortex_m3->dwt_comparator_list;
973 LOG_WARNING("watchpoint already set");
977 if (watchpoint->mask == 0xffffffffu)
979 while(comparator_list[dwt_num].used && (dwt_num < cortex_m3->dwt_num_comp))
981 if (dwt_num >= cortex_m3->dwt_num_comp)
983 LOG_DEBUG("ERROR Can not find free DWT Comparator");
984 LOG_WARNING("ERROR Can not find free DWT Comparator");
987 watchpoint->set = dwt_num + 1;
989 temp = watchpoint->length;
995 comparator_list[dwt_num].used = 1;
996 comparator_list[dwt_num].comp = watchpoint->address;
997 comparator_list[dwt_num].mask = mask;
998 comparator_list[dwt_num].function = watchpoint->rw + 5;
999 target_write_u32(target, comparator_list[dwt_num].dwt_comparator_address, comparator_list[dwt_num].comp);
1000 target_write_u32(target, comparator_list[dwt_num].dwt_comparator_address|0x4, comparator_list[dwt_num].mask);
1001 target_write_u32(target, comparator_list[dwt_num].dwt_comparator_address|0x8, comparator_list[dwt_num].function);
1002 LOG_DEBUG("dwt_num %i 0x%x 0x%x 0x%x", dwt_num, comparator_list[dwt_num].comp, comparator_list[dwt_num].mask, comparator_list[dwt_num].function);
1006 LOG_WARNING("Cannot watch data values"); /* Move this test to add_watchpoint */
1014 int cortex_m3_unset_watchpoint(struct target_s *target, watchpoint_t *watchpoint)
1016 /* get pointers to arch-specific information */
1017 armv7m_common_t *armv7m = target->arch_info;
1018 cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
1019 cortex_m3_dwt_comparator_t * comparator_list = cortex_m3->dwt_comparator_list;
1022 if (!watchpoint->set)
1024 LOG_WARNING("watchpoint not set");
1028 dwt_num = watchpoint->set - 1;
1030 if ((dwt_num < 0) || (dwt_num >= cortex_m3->dwt_num_comp))
1032 LOG_DEBUG("Invalid DWT Comparator number in watchpoint");
1035 comparator_list[dwt_num].used = 0;
1036 comparator_list[dwt_num].function = 0;
1037 target_write_u32(target, comparator_list[dwt_num].dwt_comparator_address|0x8, comparator_list[dwt_num].function);
1039 watchpoint->set = 0;
1044 int cortex_m3_add_watchpoint(struct target_s *target, watchpoint_t *watchpoint)
1046 /* get pointers to arch-specific information */
1047 armv7m_common_t *armv7m = target->arch_info;
1048 cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
1050 if (target->state != TARGET_HALTED)
1052 LOG_WARNING("target not halted");
1053 return ERROR_TARGET_NOT_HALTED;
1056 if (cortex_m3->dwt_comp_available < 1)
1058 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
1061 if ((watchpoint->length != 1) && (watchpoint->length != 2) && (watchpoint->length != 4))
1063 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
1066 cortex_m3->dwt_comp_available--;
1071 int cortex_m3_remove_watchpoint(struct target_s *target, watchpoint_t *watchpoint)
1073 /* get pointers to arch-specific information */
1074 armv7m_common_t *armv7m = target->arch_info;
1075 cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
1077 if (target->state != TARGET_HALTED)
1079 LOG_WARNING("target not halted");
1080 return ERROR_TARGET_NOT_HALTED;
1083 if (watchpoint->set)
1085 cortex_m3_unset_watchpoint(target, watchpoint);
1088 cortex_m3->dwt_comp_available++;
1093 void cortex_m3_enable_watchpoints(struct target_s *target)
1095 watchpoint_t *watchpoint = target->watchpoints;
1097 /* set any pending watchpoints */
1100 if (watchpoint->set == 0)
1101 cortex_m3_set_watchpoint(target, watchpoint);
1102 watchpoint = watchpoint->next;
1106 int cortex_m3_load_core_reg_u32(struct target_s *target, enum armv7m_regtype type, u32 num, u32 * value)
1109 /* get pointers to arch-specific information */
1110 armv7m_common_t *armv7m = target->arch_info;
1111 cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
1112 swjdp_common_t *swjdp = &cortex_m3->swjdp_info;
1114 if ((type == ARMV7M_REGISTER_CORE_GP) && (num <= ARMV7M_PSP))
1116 /* read a normal core register */
1117 retval = ahbap_read_coreregister_u32(swjdp, value, num);
1119 if (retval != ERROR_OK)
1121 LOG_ERROR("JTAG failure %i",retval);
1122 return ERROR_JTAG_DEVICE_ERROR;
1124 LOG_DEBUG("load from core reg %i value 0x%x",num,*value);
1126 else if (type == ARMV7M_REGISTER_CORE_SP) /* Special purpose core register */
1128 /* read other registers */
1129 ahbap_read_coreregister_u32(swjdp, value, 20);
1134 *value = buf_get_u32((u8*)value, 0, 8);
1138 *value = buf_get_u32((u8*)value, 8, 8);
1142 *value = buf_get_u32((u8*)value, 16, 8);
1146 *value = buf_get_u32((u8*)value, 24, 8);
1150 LOG_DEBUG("load from special reg %i value 0x%x", num, *value);
1154 return ERROR_INVALID_ARGUMENTS;
1160 int cortex_m3_store_core_reg_u32(struct target_s *target, enum armv7m_regtype type, u32 num, u32 value)
1165 /* get pointers to arch-specific information */
1166 armv7m_common_t *armv7m = target->arch_info;
1167 cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
1168 swjdp_common_t *swjdp = &cortex_m3->swjdp_info;
1170 #ifdef ARMV7_GDB_HACKS
1171 /* If the LR register is being modified, make sure it will put us
1172 * in "thumb" mode, or an INVSTATE exception will occur. This is a
1173 * hack to deal with the fact that gdb will sometimes "forge"
1174 * return addresses, and doesn't set the LSB correctly (i.e., when
1175 * printing expressions containing function calls, it sets LR=0.) */
1181 if ((type == ARMV7M_REGISTER_CORE_GP) && (num <= ARMV7M_PSP))
1183 retval = ahbap_write_coreregister_u32(swjdp, value, num);
1184 if (retval != ERROR_OK)
1186 LOG_ERROR("JTAG failure %i", retval);
1187 armv7m->core_cache->reg_list[num].dirty = armv7m->core_cache->reg_list[num].valid;
1188 return ERROR_JTAG_DEVICE_ERROR;
1190 LOG_DEBUG("write core reg %i value 0x%x", num, value);
1192 else if (type == ARMV7M_REGISTER_CORE_SP) /* Special purpose core register */
1194 /* write other registers */
1196 ahbap_read_coreregister_u32(swjdp, ®, 20);
1201 buf_set_u32((u8*)®, 0, 8, value);
1205 buf_set_u32((u8*)®, 8, 8, value);
1209 buf_set_u32((u8*)®, 16, 8, value);
1213 buf_set_u32((u8*)®, 24, 8, value);
1217 ahbap_write_coreregister_u32(swjdp, reg, 20);
1219 LOG_DEBUG("write special reg %i value 0x%x ", num, value);
1223 return ERROR_INVALID_ARGUMENTS;
1229 int cortex_m3_read_memory(struct target_s *target, u32 address, u32 size, u32 count, u8 *buffer)
1231 /* get pointers to arch-specific information */
1232 armv7m_common_t *armv7m = target->arch_info;
1233 cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
1234 swjdp_common_t *swjdp = &cortex_m3->swjdp_info;
1237 /* sanitize arguments */
1238 if (((size != 4) && (size != 2) && (size != 1)) || (count == 0) || !(buffer))
1239 return ERROR_INVALID_ARGUMENTS;
1241 /* cortex_m3 handles unaligned memory access */
1246 retval = ahbap_read_buf_u32(swjdp, buffer, 4 * count, address);
1249 retval = ahbap_read_buf_u16(swjdp, buffer, 2 * count, address);
1252 retval = ahbap_read_buf_u8(swjdp, buffer, count, address);
1255 LOG_ERROR("BUG: we shouldn't get here");
1262 int cortex_m3_write_memory(struct target_s *target, u32 address, u32 size, u32 count, u8 *buffer)
1264 /* get pointers to arch-specific information */
1265 armv7m_common_t *armv7m = target->arch_info;
1266 cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
1267 swjdp_common_t *swjdp = &cortex_m3->swjdp_info;
1270 /* sanitize arguments */
1271 if (((size != 4) && (size != 2) && (size != 1)) || (count == 0) || !(buffer))
1272 return ERROR_INVALID_ARGUMENTS;
1277 retval = ahbap_write_buf_u32(swjdp, buffer, 4 * count, address);
1280 retval = ahbap_write_buf_u16(swjdp, buffer, 2 * count, address);
1283 retval = ahbap_write_buf_u8(swjdp, buffer, count, address);
1286 LOG_ERROR("BUG: we shouldn't get here");
1293 int cortex_m3_bulk_write_memory(target_t *target, u32 address, u32 count, u8 *buffer)
1295 return cortex_m3_write_memory(target, address, 4, count, buffer);
1298 void cortex_m3_build_reg_cache(target_t *target)
1300 armv7m_build_reg_cache(target);
1303 int cortex_m3_init_target(struct command_context_s *cmd_ctx, struct target_s *target)
1305 cortex_m3_build_reg_cache(target);
1309 int cortex_m3_examine(struct command_context_s *cmd_ctx, struct target_s *target)
1312 u32 cpuid, fpcr, dwtcr, ictr;
1315 /* get pointers to arch-specific information */
1316 armv7m_common_t *armv7m = target->arch_info;
1317 cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
1318 swjdp_common_t *swjdp = &cortex_m3->swjdp_info;
1320 target->type->examined = 1;
1322 if ((retval=ahbap_debugport_init(swjdp))!=ERROR_OK)
1325 /* Read from Device Identification Registers */
1326 if ((retval=target_read_u32(target, CPUID, &cpuid))!=ERROR_OK)
1329 if (((cpuid >> 4) & 0xc3f) == 0xc23)
1330 LOG_DEBUG("CORTEX-M3 processor detected");
1331 LOG_DEBUG("cpuid: 0x%8.8x", cpuid);
1333 target_read_u32(target, NVIC_ICTR, &ictr);
1334 cortex_m3->intlinesnum = (ictr & 0x1F) + 1;
1335 cortex_m3->intsetenable = calloc(cortex_m3->intlinesnum, 4);
1336 for (i = 0; i < cortex_m3->intlinesnum; i++)
1338 target_read_u32(target, NVIC_ISE0 + 4 * i, cortex_m3->intsetenable + i);
1339 LOG_DEBUG("interrupt enable[%i] = 0x%8.8x", i, cortex_m3->intsetenable[i]);
1343 target_read_u32(target, FP_CTRL, &fpcr);
1344 cortex_m3->auto_bp_type = 1;
1345 cortex_m3->fp_num_code = (fpcr >> 4) & 0xF;
1346 cortex_m3->fp_num_lit = (fpcr >> 8) & 0xF;
1347 cortex_m3->fp_code_available = cortex_m3->fp_num_code;
1348 cortex_m3->fp_comparator_list = calloc(cortex_m3->fp_num_code + cortex_m3->fp_num_lit, sizeof(cortex_m3_fp_comparator_t));
1349 for (i = 0; i < cortex_m3->fp_num_code + cortex_m3->fp_num_lit; i++)
1351 cortex_m3->fp_comparator_list[i].type = (i < cortex_m3->fp_num_code) ? FPCR_CODE : FPCR_LITERAL;
1352 cortex_m3->fp_comparator_list[i].fpcr_address = FP_COMP0 + 4 * i;
1354 LOG_DEBUG("FPB fpcr 0x%x, numcode %i, numlit %i", fpcr, cortex_m3->fp_num_code, cortex_m3->fp_num_lit);
1357 target_read_u32(target, DWT_CTRL, &dwtcr);
1358 cortex_m3->dwt_num_comp = (dwtcr >> 28) & 0xF;
1359 cortex_m3->dwt_comp_available = cortex_m3->dwt_num_comp;
1360 cortex_m3->dwt_comparator_list=calloc(cortex_m3->dwt_num_comp, sizeof(cortex_m3_dwt_comparator_t));
1361 for (i = 0; i < cortex_m3->dwt_num_comp; i++)
1363 cortex_m3->dwt_comparator_list[i].dwt_comparator_address = DWT_COMP0 + 0x10 * i;
1370 int cortex_m3_quit()
1376 int cortex_m3_dcc_read(swjdp_common_t *swjdp, u8 *value, u8 *ctrl)
1380 ahbap_read_buf_u16( swjdp, (u8*)&dcrdr, 1, DCB_DCRDR);
1382 *value = (u8)(dcrdr >> 8);
1384 LOG_DEBUG("data 0x%x ctrl 0x%x", *value, *ctrl);
1386 /* write ack back to software dcc register
1387 * signify we have read data */
1388 if (dcrdr & (1 << 0))
1391 ahbap_write_buf_u16( swjdp, (u8*)&dcrdr, 1, DCB_DCRDR);
1397 int cortex_m3_target_request_data(target_t *target, u32 size, u8 *buffer)
1399 armv7m_common_t *armv7m = target->arch_info;
1400 cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
1401 swjdp_common_t *swjdp = &cortex_m3->swjdp_info;
1406 for (i = 0; i < (size * 4); i++)
1408 cortex_m3_dcc_read(swjdp, &data, &ctrl);
1415 int cortex_m3_handle_target_request(void *priv)
1417 target_t *target = priv;
1418 if (!target->type->examined)
1420 armv7m_common_t *armv7m = target->arch_info;
1421 cortex_m3_common_t *cortex_m3 = armv7m->arch_info;
1422 swjdp_common_t *swjdp = &cortex_m3->swjdp_info;
1424 if (!target->dbg_msg_enabled)
1427 if (target->state == TARGET_RUNNING)
1432 cortex_m3_dcc_read(swjdp, &data, &ctrl);
1434 /* check if we have data */
1435 if (ctrl & (1 << 0))
1439 /* we assume target is quick enough */
1441 cortex_m3_dcc_read(swjdp, &data, &ctrl);
1442 request |= (data << 8);
1443 cortex_m3_dcc_read(swjdp, &data, &ctrl);
1444 request |= (data << 16);
1445 cortex_m3_dcc_read(swjdp, &data, &ctrl);
1446 request |= (data << 24);
1447 target_request(target, request);
1454 int cortex_m3_init_arch_info(target_t *target, cortex_m3_common_t *cortex_m3, int chain_pos, char *variant)
1456 armv7m_common_t *armv7m;
1457 armv7m = &cortex_m3->armv7m;
1459 /* prepare JTAG information for the new target */
1460 cortex_m3->jtag_info.chain_pos = chain_pos;
1461 cortex_m3->jtag_info.scann_size = 4;
1463 cortex_m3->swjdp_info.dp_select_value = -1;
1464 cortex_m3->swjdp_info.ap_csw_value = -1;
1465 cortex_m3->swjdp_info.ap_tar_value = -1;
1466 cortex_m3->swjdp_info.jtag_info = &cortex_m3->jtag_info;
1468 /* initialize arch-specific breakpoint handling */
1470 cortex_m3->common_magic = CORTEX_M3_COMMON_MAGIC;
1471 cortex_m3->arch_info = NULL;
1473 /* register arch-specific functions */
1474 armv7m->examine_debug_reason = cortex_m3_examine_debug_reason;
1476 armv7m->pre_debug_entry = NULL;
1477 armv7m->post_debug_entry = NULL;
1479 armv7m->pre_restore_context = NULL;
1480 armv7m->post_restore_context = NULL;
1484 cortex_m3->variant = strdup(variant);
1488 cortex_m3->variant = strdup("");
1491 armv7m_init_arch_info(target, armv7m);
1492 armv7m->arch_info = cortex_m3;
1493 armv7m->load_core_reg_u32 = cortex_m3_load_core_reg_u32;
1494 armv7m->store_core_reg_u32 = cortex_m3_store_core_reg_u32;
1496 target_register_timer_callback(cortex_m3_handle_target_request, 1, 1, target);
1501 /* target cortex_m3 <endianess> <startup_mode> <chain_pos> <variant>*/
1502 int cortex_m3_target_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc, struct target_s *target)
1505 char *variant = NULL;
1506 cortex_m3_common_t *cortex_m3 = malloc(sizeof(cortex_m3_common_t));
1507 memset(cortex_m3, 0, sizeof(*cortex_m3));
1511 LOG_ERROR("'target cortex_m3' requires at least one additional argument");
1515 chain_pos = strtoul(args[3], NULL, 0);
1520 cortex_m3_init_arch_info(target, cortex_m3, chain_pos, variant);
1521 cortex_m3_register_commands(cmd_ctx);
1526 int cortex_m3_register_commands(struct command_context_s *cmd_ctx)
1530 retval = armv7m_register_commands(cmd_ctx);