1 /***************************************************************************
2 * Copyright (C) 2005 by Dominic Rath *
3 * Dominic.Rath@gmx.de *
5 * Copyright (C) 2006 by Magnus Lundin *
8 * Copyright (C) 2008 by Spencer Oliver *
9 * spen@spen-soft.co.uk *
11 * Copyright (C) 2009 by Dirk Behme *
12 * dirk.behme@gmail.com - copy from cortex_m3 *
14 * Copyright (C) 2010 Øyvind Harboe *
15 * oyvind.harboe@zylin.com *
17 * Copyright (C) ST-Ericsson SA 2011 *
18 * michel.jaouen@stericsson.com : smp minimum support *
20 * Copyright (C) Broadcom 2012 *
21 * ehunter@broadcom.com : Cortex-R4 support *
23 * Copyright (C) 2013 Kamal Dasu *
24 * kdasu.kdev@gmail.com *
26 * This program is free software; you can redistribute it and/or modify *
27 * it under the terms of the GNU General Public License as published by *
28 * the Free Software Foundation; either version 2 of the License, or *
29 * (at your option) any later version. *
31 * This program is distributed in the hope that it will be useful, *
32 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
33 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
34 * GNU General Public License for more details. *
36 * You should have received a copy of the GNU General Public License *
37 * along with this program. If not, see <http://www.gnu.org/licenses/>. *
39 * Cortex-A8(tm) TRM, ARM DDI 0344H *
40 * Cortex-A9(tm) TRM, ARM DDI 0407F *
41 * Cortex-A4(tm) TRM, ARM DDI 0363E *
42 * Cortex-A15(tm)TRM, ARM DDI 0438C *
44 ***************************************************************************/
50 #include "breakpoints.h"
53 #include "armv7a_mmu.h"
54 #include "target_request.h"
55 #include "target_type.h"
56 #include "arm_opcodes.h"
57 #include "arm_semihosting.h"
58 #include "transport/transport.h"
60 #include <helper/time_support.h>
62 static int cortex_a_poll(struct target
*target
);
63 static int cortex_a_debug_entry(struct target
*target
);
64 static int cortex_a_restore_context(struct target
*target
, bool bpwp
);
65 static int cortex_a_set_breakpoint(struct target
*target
,
66 struct breakpoint
*breakpoint
, uint8_t matchmode
);
67 static int cortex_a_set_context_breakpoint(struct target
*target
,
68 struct breakpoint
*breakpoint
, uint8_t matchmode
);
69 static int cortex_a_set_hybrid_breakpoint(struct target
*target
,
70 struct breakpoint
*breakpoint
);
71 static int cortex_a_unset_breakpoint(struct target
*target
,
72 struct breakpoint
*breakpoint
);
73 static int cortex_a_mmu(struct target
*target
, int *enabled
);
74 static int cortex_a_mmu_modify(struct target
*target
, int enable
);
75 static int cortex_a_virt2phys(struct target
*target
,
76 target_addr_t virt
, target_addr_t
*phys
);
77 static int cortex_a_read_cpu_memory(struct target
*target
,
78 uint32_t address
, uint32_t size
, uint32_t count
, uint8_t *buffer
);
81 /* restore cp15_control_reg at resume */
82 static int cortex_a_restore_cp15_control_reg(struct target
*target
)
84 int retval
= ERROR_OK
;
85 struct cortex_a_common
*cortex_a
= target_to_cortex_a(target
);
86 struct armv7a_common
*armv7a
= target_to_armv7a(target
);
88 if (cortex_a
->cp15_control_reg
!= cortex_a
->cp15_control_reg_curr
) {
89 cortex_a
->cp15_control_reg_curr
= cortex_a
->cp15_control_reg
;
90 /* LOG_INFO("cp15_control_reg: %8.8" PRIx32, cortex_a->cp15_control_reg); */
91 retval
= armv7a
->arm
.mcr(target
, 15,
94 cortex_a
->cp15_control_reg
);
100 * Set up ARM core for memory access.
101 * If !phys_access, switch to SVC mode and make sure MMU is on
102 * If phys_access, switch off mmu
104 static int cortex_a_prep_memaccess(struct target
*target
, int phys_access
)
106 struct armv7a_common
*armv7a
= target_to_armv7a(target
);
107 struct cortex_a_common
*cortex_a
= target_to_cortex_a(target
);
110 if (phys_access
== 0) {
111 arm_dpm_modeswitch(&armv7a
->dpm
, ARM_MODE_SVC
);
112 cortex_a_mmu(target
, &mmu_enabled
);
114 cortex_a_mmu_modify(target
, 1);
115 if (cortex_a
->dacrfixup_mode
== CORTEX_A_DACRFIXUP_ON
) {
116 /* overwrite DACR to all-manager */
117 armv7a
->arm
.mcr(target
, 15,
122 cortex_a_mmu(target
, &mmu_enabled
);
124 cortex_a_mmu_modify(target
, 0);
130 * Restore ARM core after memory access.
131 * If !phys_access, switch to previous mode
132 * If phys_access, restore MMU setting
134 static int cortex_a_post_memaccess(struct target
*target
, int phys_access
)
136 struct armv7a_common
*armv7a
= target_to_armv7a(target
);
137 struct cortex_a_common
*cortex_a
= target_to_cortex_a(target
);
139 if (phys_access
== 0) {
140 if (cortex_a
->dacrfixup_mode
== CORTEX_A_DACRFIXUP_ON
) {
142 armv7a
->arm
.mcr(target
, 15,
144 cortex_a
->cp15_dacr_reg
);
146 arm_dpm_modeswitch(&armv7a
->dpm
, ARM_MODE_ANY
);
149 cortex_a_mmu(target
, &mmu_enabled
);
151 cortex_a_mmu_modify(target
, 1);
157 /* modify cp15_control_reg in order to enable or disable mmu for :
158 * - virt2phys address conversion
159 * - read or write memory in phys or virt address */
160 static int cortex_a_mmu_modify(struct target
*target
, int enable
)
162 struct cortex_a_common
*cortex_a
= target_to_cortex_a(target
);
163 struct armv7a_common
*armv7a
= target_to_armv7a(target
);
164 int retval
= ERROR_OK
;
168 /* if mmu enabled at target stop and mmu not enable */
169 if (!(cortex_a
->cp15_control_reg
& 0x1U
)) {
170 LOG_ERROR("trying to enable mmu on target stopped with mmu disable");
173 if ((cortex_a
->cp15_control_reg_curr
& 0x1U
) == 0) {
174 cortex_a
->cp15_control_reg_curr
|= 0x1U
;
178 if ((cortex_a
->cp15_control_reg_curr
& 0x1U
) == 0x1U
) {
179 cortex_a
->cp15_control_reg_curr
&= ~0x1U
;
185 LOG_DEBUG("%s, writing cp15 ctrl: %" PRIx32
,
186 enable
? "enable mmu" : "disable mmu",
187 cortex_a
->cp15_control_reg_curr
);
189 retval
= armv7a
->arm
.mcr(target
, 15,
192 cortex_a
->cp15_control_reg_curr
);
198 * Cortex-A Basic debug access, very low level assumes state is saved
200 static int cortex_a_init_debug_access(struct target
*target
)
202 struct armv7a_common
*armv7a
= target_to_armv7a(target
);
206 /* lock memory-mapped access to debug registers to prevent
207 * software interference */
208 retval
= mem_ap_write_u32(armv7a
->debug_ap
,
209 armv7a
->debug_base
+ CPUDBG_LOCKACCESS
, 0);
210 if (retval
!= ERROR_OK
)
213 /* Disable cacheline fills and force cache write-through in debug state */
214 retval
= mem_ap_write_u32(armv7a
->debug_ap
,
215 armv7a
->debug_base
+ CPUDBG_DSCCR
, 0);
216 if (retval
!= ERROR_OK
)
219 /* Disable TLB lookup and refill/eviction in debug state */
220 retval
= mem_ap_write_u32(armv7a
->debug_ap
,
221 armv7a
->debug_base
+ CPUDBG_DSMCR
, 0);
222 if (retval
!= ERROR_OK
)
225 retval
= dap_run(armv7a
->debug_ap
->dap
);
226 if (retval
!= ERROR_OK
)
229 /* Enabling of instruction execution in debug mode is done in debug_entry code */
231 /* Resync breakpoint registers */
233 /* Enable halt for breakpoint, watchpoint and vector catch */
234 retval
= mem_ap_read_atomic_u32(armv7a
->debug_ap
,
235 armv7a
->debug_base
+ CPUDBG_DSCR
, &dscr
);
236 if (retval
!= ERROR_OK
)
238 retval
= mem_ap_write_atomic_u32(armv7a
->debug_ap
,
239 armv7a
->debug_base
+ CPUDBG_DSCR
, dscr
| DSCR_HALT_DBG_MODE
);
240 if (retval
!= ERROR_OK
)
243 /* Since this is likely called from init or reset, update target state information*/
244 return cortex_a_poll(target
);
247 static int cortex_a_wait_instrcmpl(struct target
*target
, uint32_t *dscr
, bool force
)
249 /* Waits until InstrCmpl_l becomes 1, indicating instruction is done.
250 * Writes final value of DSCR into *dscr. Pass force to force always
251 * reading DSCR at least once. */
252 struct armv7a_common
*armv7a
= target_to_armv7a(target
);
253 int64_t then
= timeval_ms();
254 while ((*dscr
& DSCR_INSTR_COMP
) == 0 || force
) {
256 int retval
= mem_ap_read_atomic_u32(armv7a
->debug_ap
,
257 armv7a
->debug_base
+ CPUDBG_DSCR
, dscr
);
258 if (retval
!= ERROR_OK
) {
259 LOG_ERROR("Could not read DSCR register");
262 if (timeval_ms() > then
+ 1000) {
263 LOG_ERROR("Timeout waiting for InstrCompl=1");
270 /* To reduce needless round-trips, pass in a pointer to the current
271 * DSCR value. Initialize it to zero if you just need to know the
272 * value on return from this function; or DSCR_INSTR_COMP if you
273 * happen to know that no instruction is pending.
275 static int cortex_a_exec_opcode(struct target
*target
,
276 uint32_t opcode
, uint32_t *dscr_p
)
280 struct armv7a_common
*armv7a
= target_to_armv7a(target
);
282 dscr
= dscr_p
? *dscr_p
: 0;
284 LOG_DEBUG("exec opcode 0x%08" PRIx32
, opcode
);
286 /* Wait for InstrCompl bit to be set */
287 retval
= cortex_a_wait_instrcmpl(target
, dscr_p
, false);
288 if (retval
!= ERROR_OK
)
291 retval
= mem_ap_write_u32(armv7a
->debug_ap
,
292 armv7a
->debug_base
+ CPUDBG_ITR
, opcode
);
293 if (retval
!= ERROR_OK
)
296 int64_t then
= timeval_ms();
298 retval
= mem_ap_read_atomic_u32(armv7a
->debug_ap
,
299 armv7a
->debug_base
+ CPUDBG_DSCR
, &dscr
);
300 if (retval
!= ERROR_OK
) {
301 LOG_ERROR("Could not read DSCR register");
304 if (timeval_ms() > then
+ 1000) {
305 LOG_ERROR("Timeout waiting for cortex_a_exec_opcode");
308 } while ((dscr
& DSCR_INSTR_COMP
) == 0); /* Wait for InstrCompl bit to be set */
316 /* Write to memory mapped registers directly with no cache or mmu handling */
317 static int cortex_a_dap_write_memap_register_u32(struct target
*target
,
322 struct armv7a_common
*armv7a
= target_to_armv7a(target
);
324 retval
= mem_ap_write_atomic_u32(armv7a
->debug_ap
, address
, value
);
330 * Cortex-A implementation of Debug Programmer's Model
332 * NOTE the invariant: these routines return with DSCR_INSTR_COMP set,
333 * so there's no need to poll for it before executing an instruction.
335 * NOTE that in several of these cases the "stall" mode might be useful.
336 * It'd let us queue a few operations together... prepare/finish might
337 * be the places to enable/disable that mode.
340 static inline struct cortex_a_common
*dpm_to_a(struct arm_dpm
*dpm
)
342 return container_of(dpm
, struct cortex_a_common
, armv7a_common
.dpm
);
345 static int cortex_a_write_dcc(struct cortex_a_common
*a
, uint32_t data
)
347 LOG_DEBUG("write DCC 0x%08" PRIx32
, data
);
348 return mem_ap_write_u32(a
->armv7a_common
.debug_ap
,
349 a
->armv7a_common
.debug_base
+ CPUDBG_DTRRX
, data
);
352 static int cortex_a_read_dcc(struct cortex_a_common
*a
, uint32_t *data
,
355 uint32_t dscr
= DSCR_INSTR_COMP
;
361 /* Wait for DTRRXfull */
362 int64_t then
= timeval_ms();
363 while ((dscr
& DSCR_DTR_TX_FULL
) == 0) {
364 retval
= mem_ap_read_atomic_u32(a
->armv7a_common
.debug_ap
,
365 a
->armv7a_common
.debug_base
+ CPUDBG_DSCR
,
367 if (retval
!= ERROR_OK
)
369 if (timeval_ms() > then
+ 1000) {
370 LOG_ERROR("Timeout waiting for read dcc");
375 retval
= mem_ap_read_atomic_u32(a
->armv7a_common
.debug_ap
,
376 a
->armv7a_common
.debug_base
+ CPUDBG_DTRTX
, data
);
377 if (retval
!= ERROR_OK
)
379 /* LOG_DEBUG("read DCC 0x%08" PRIx32, *data); */
387 static int cortex_a_dpm_prepare(struct arm_dpm
*dpm
)
389 struct cortex_a_common
*a
= dpm_to_a(dpm
);
393 /* set up invariant: INSTR_COMP is set after ever DPM operation */
394 int64_t then
= timeval_ms();
396 retval
= mem_ap_read_atomic_u32(a
->armv7a_common
.debug_ap
,
397 a
->armv7a_common
.debug_base
+ CPUDBG_DSCR
,
399 if (retval
!= ERROR_OK
)
401 if ((dscr
& DSCR_INSTR_COMP
) != 0)
403 if (timeval_ms() > then
+ 1000) {
404 LOG_ERROR("Timeout waiting for dpm prepare");
409 /* this "should never happen" ... */
410 if (dscr
& DSCR_DTR_RX_FULL
) {
411 LOG_ERROR("DSCR_DTR_RX_FULL, dscr 0x%08" PRIx32
, dscr
);
413 retval
= cortex_a_exec_opcode(
414 a
->armv7a_common
.arm
.target
,
415 ARMV4_5_MRC(14, 0, 0, 0, 5, 0),
417 if (retval
!= ERROR_OK
)
424 static int cortex_a_dpm_finish(struct arm_dpm
*dpm
)
426 /* REVISIT what could be done here? */
430 static int cortex_a_instr_write_data_dcc(struct arm_dpm
*dpm
,
431 uint32_t opcode
, uint32_t data
)
433 struct cortex_a_common
*a
= dpm_to_a(dpm
);
435 uint32_t dscr
= DSCR_INSTR_COMP
;
437 retval
= cortex_a_write_dcc(a
, data
);
438 if (retval
!= ERROR_OK
)
441 return cortex_a_exec_opcode(
442 a
->armv7a_common
.arm
.target
,
447 static int cortex_a_instr_write_data_r0(struct arm_dpm
*dpm
,
448 uint32_t opcode
, uint32_t data
)
450 struct cortex_a_common
*a
= dpm_to_a(dpm
);
451 uint32_t dscr
= DSCR_INSTR_COMP
;
454 retval
= cortex_a_write_dcc(a
, data
);
455 if (retval
!= ERROR_OK
)
458 /* DCCRX to R0, "MCR p14, 0, R0, c0, c5, 0", 0xEE000E15 */
459 retval
= cortex_a_exec_opcode(
460 a
->armv7a_common
.arm
.target
,
461 ARMV4_5_MRC(14, 0, 0, 0, 5, 0),
463 if (retval
!= ERROR_OK
)
466 /* then the opcode, taking data from R0 */
467 retval
= cortex_a_exec_opcode(
468 a
->armv7a_common
.arm
.target
,
475 static int cortex_a_instr_cpsr_sync(struct arm_dpm
*dpm
)
477 struct target
*target
= dpm
->arm
->target
;
478 uint32_t dscr
= DSCR_INSTR_COMP
;
480 /* "Prefetch flush" after modifying execution status in CPSR */
481 return cortex_a_exec_opcode(target
,
482 ARMV4_5_MCR(15, 0, 0, 7, 5, 4),
486 static int cortex_a_instr_read_data_dcc(struct arm_dpm
*dpm
,
487 uint32_t opcode
, uint32_t *data
)
489 struct cortex_a_common
*a
= dpm_to_a(dpm
);
491 uint32_t dscr
= DSCR_INSTR_COMP
;
493 /* the opcode, writing data to DCC */
494 retval
= cortex_a_exec_opcode(
495 a
->armv7a_common
.arm
.target
,
498 if (retval
!= ERROR_OK
)
501 return cortex_a_read_dcc(a
, data
, &dscr
);
505 static int cortex_a_instr_read_data_r0(struct arm_dpm
*dpm
,
506 uint32_t opcode
, uint32_t *data
)
508 struct cortex_a_common
*a
= dpm_to_a(dpm
);
509 uint32_t dscr
= DSCR_INSTR_COMP
;
512 /* the opcode, writing data to R0 */
513 retval
= cortex_a_exec_opcode(
514 a
->armv7a_common
.arm
.target
,
517 if (retval
!= ERROR_OK
)
520 /* write R0 to DCC */
521 retval
= cortex_a_exec_opcode(
522 a
->armv7a_common
.arm
.target
,
523 ARMV4_5_MCR(14, 0, 0, 0, 5, 0),
525 if (retval
!= ERROR_OK
)
528 return cortex_a_read_dcc(a
, data
, &dscr
);
531 static int cortex_a_bpwp_enable(struct arm_dpm
*dpm
, unsigned index_t
,
532 uint32_t addr
, uint32_t control
)
534 struct cortex_a_common
*a
= dpm_to_a(dpm
);
535 uint32_t vr
= a
->armv7a_common
.debug_base
;
536 uint32_t cr
= a
->armv7a_common
.debug_base
;
540 case 0 ... 15: /* breakpoints */
541 vr
+= CPUDBG_BVR_BASE
;
542 cr
+= CPUDBG_BCR_BASE
;
544 case 16 ... 31: /* watchpoints */
545 vr
+= CPUDBG_WVR_BASE
;
546 cr
+= CPUDBG_WCR_BASE
;
555 LOG_DEBUG("A: bpwp enable, vr %08x cr %08x",
556 (unsigned) vr
, (unsigned) cr
);
558 retval
= cortex_a_dap_write_memap_register_u32(dpm
->arm
->target
,
560 if (retval
!= ERROR_OK
)
562 retval
= cortex_a_dap_write_memap_register_u32(dpm
->arm
->target
,
567 static int cortex_a_bpwp_disable(struct arm_dpm
*dpm
, unsigned index_t
)
569 struct cortex_a_common
*a
= dpm_to_a(dpm
);
574 cr
= a
->armv7a_common
.debug_base
+ CPUDBG_BCR_BASE
;
577 cr
= a
->armv7a_common
.debug_base
+ CPUDBG_WCR_BASE
;
585 LOG_DEBUG("A: bpwp disable, cr %08x", (unsigned) cr
);
587 /* clear control register */
588 return cortex_a_dap_write_memap_register_u32(dpm
->arm
->target
, cr
, 0);
591 static int cortex_a_dpm_setup(struct cortex_a_common
*a
, uint32_t didr
)
593 struct arm_dpm
*dpm
= &a
->armv7a_common
.dpm
;
596 dpm
->arm
= &a
->armv7a_common
.arm
;
599 dpm
->prepare
= cortex_a_dpm_prepare
;
600 dpm
->finish
= cortex_a_dpm_finish
;
602 dpm
->instr_write_data_dcc
= cortex_a_instr_write_data_dcc
;
603 dpm
->instr_write_data_r0
= cortex_a_instr_write_data_r0
;
604 dpm
->instr_cpsr_sync
= cortex_a_instr_cpsr_sync
;
606 dpm
->instr_read_data_dcc
= cortex_a_instr_read_data_dcc
;
607 dpm
->instr_read_data_r0
= cortex_a_instr_read_data_r0
;
609 dpm
->bpwp_enable
= cortex_a_bpwp_enable
;
610 dpm
->bpwp_disable
= cortex_a_bpwp_disable
;
612 retval
= arm_dpm_setup(dpm
);
613 if (retval
== ERROR_OK
)
614 retval
= arm_dpm_initialize(dpm
);
618 static struct target
*get_cortex_a(struct target
*target
, int32_t coreid
)
620 struct target_list
*head
;
624 while (head
!= (struct target_list
*)NULL
) {
626 if ((curr
->coreid
== coreid
) && (curr
->state
== TARGET_HALTED
))
632 static int cortex_a_halt(struct target
*target
);
634 static int cortex_a_halt_smp(struct target
*target
)
637 struct target_list
*head
;
640 while (head
!= (struct target_list
*)NULL
) {
642 if ((curr
!= target
) && (curr
->state
!= TARGET_HALTED
)
643 && target_was_examined(curr
))
644 retval
+= cortex_a_halt(curr
);
650 static int update_halt_gdb(struct target
*target
)
652 struct target
*gdb_target
= NULL
;
653 struct target_list
*head
;
657 if (target
->gdb_service
&& target
->gdb_service
->core
[0] == -1) {
658 target
->gdb_service
->target
= target
;
659 target
->gdb_service
->core
[0] = target
->coreid
;
660 retval
+= cortex_a_halt_smp(target
);
663 if (target
->gdb_service
)
664 gdb_target
= target
->gdb_service
->target
;
666 foreach_smp_target(head
, target
->head
) {
668 /* skip calling context */
671 if (!target_was_examined(curr
))
673 /* skip targets that were already halted */
674 if (curr
->state
== TARGET_HALTED
)
676 /* Skip gdb_target; it alerts GDB so has to be polled as last one */
677 if (curr
== gdb_target
)
680 /* avoid recursion in cortex_a_poll() */
686 /* after all targets were updated, poll the gdb serving target */
687 if (gdb_target
!= NULL
&& gdb_target
!= target
)
688 cortex_a_poll(gdb_target
);
693 * Cortex-A Run control
696 static int cortex_a_poll(struct target
*target
)
698 int retval
= ERROR_OK
;
700 struct cortex_a_common
*cortex_a
= target_to_cortex_a(target
);
701 struct armv7a_common
*armv7a
= &cortex_a
->armv7a_common
;
702 enum target_state prev_target_state
= target
->state
;
703 /* toggle to another core is done by gdb as follow */
704 /* maint packet J core_id */
706 /* the next polling trigger an halt event sent to gdb */
707 if ((target
->state
== TARGET_HALTED
) && (target
->smp
) &&
708 (target
->gdb_service
) &&
709 (target
->gdb_service
->target
== NULL
)) {
710 target
->gdb_service
->target
=
711 get_cortex_a(target
, target
->gdb_service
->core
[1]);
712 target_call_event_callbacks(target
, TARGET_EVENT_HALTED
);
715 retval
= mem_ap_read_atomic_u32(armv7a
->debug_ap
,
716 armv7a
->debug_base
+ CPUDBG_DSCR
, &dscr
);
717 if (retval
!= ERROR_OK
)
719 cortex_a
->cpudbg_dscr
= dscr
;
721 if (DSCR_RUN_MODE(dscr
) == (DSCR_CORE_HALTED
| DSCR_CORE_RESTARTED
)) {
722 if (prev_target_state
!= TARGET_HALTED
) {
723 /* We have a halting debug event */
724 LOG_DEBUG("Target halted");
725 target
->state
= TARGET_HALTED
;
727 retval
= cortex_a_debug_entry(target
);
728 if (retval
!= ERROR_OK
)
732 retval
= update_halt_gdb(target
);
733 if (retval
!= ERROR_OK
)
737 if (prev_target_state
== TARGET_DEBUG_RUNNING
) {
738 target_call_event_callbacks(target
, TARGET_EVENT_DEBUG_HALTED
);
739 } else { /* prev_target_state is RUNNING, UNKNOWN or RESET */
740 if (arm_semihosting(target
, &retval
) != 0)
743 target_call_event_callbacks(target
,
744 TARGET_EVENT_HALTED
);
748 target
->state
= TARGET_RUNNING
;
753 static int cortex_a_halt(struct target
*target
)
755 int retval
= ERROR_OK
;
757 struct armv7a_common
*armv7a
= target_to_armv7a(target
);
760 * Tell the core to be halted by writing DRCR with 0x1
761 * and then wait for the core to be halted.
763 retval
= mem_ap_write_atomic_u32(armv7a
->debug_ap
,
764 armv7a
->debug_base
+ CPUDBG_DRCR
, DRCR_HALT
);
765 if (retval
!= ERROR_OK
)
768 int64_t then
= timeval_ms();
770 retval
= mem_ap_read_atomic_u32(armv7a
->debug_ap
,
771 armv7a
->debug_base
+ CPUDBG_DSCR
, &dscr
);
772 if (retval
!= ERROR_OK
)
774 if ((dscr
& DSCR_CORE_HALTED
) != 0)
776 if (timeval_ms() > then
+ 1000) {
777 LOG_ERROR("Timeout waiting for halt");
782 target
->debug_reason
= DBG_REASON_DBGRQ
;
787 static int cortex_a_internal_restore(struct target
*target
, int current
,
788 target_addr_t
*address
, int handle_breakpoints
, int debug_execution
)
790 struct armv7a_common
*armv7a
= target_to_armv7a(target
);
791 struct arm
*arm
= &armv7a
->arm
;
795 if (!debug_execution
)
796 target_free_all_working_areas(target
);
799 if (debug_execution
) {
800 /* Disable interrupts */
801 /* We disable interrupts in the PRIMASK register instead of
802 * masking with C_MASKINTS,
803 * This is probably the same issue as Cortex-M3 Errata 377493:
804 * C_MASKINTS in parallel with disabled interrupts can cause
805 * local faults to not be taken. */
806 buf_set_u32(armv7m
->core_cache
->reg_list
[ARMV7M_PRIMASK
].value
, 0, 32, 1);
807 armv7m
->core_cache
->reg_list
[ARMV7M_PRIMASK
].dirty
= true;
808 armv7m
->core_cache
->reg_list
[ARMV7M_PRIMASK
].valid
= true;
810 /* Make sure we are in Thumb mode */
811 buf_set_u32(armv7m
->core_cache
->reg_list
[ARMV7M_xPSR
].value
, 0, 32,
812 buf_get_u32(armv7m
->core_cache
->reg_list
[ARMV7M_xPSR
].value
, 0,
814 armv7m
->core_cache
->reg_list
[ARMV7M_xPSR
].dirty
= true;
815 armv7m
->core_cache
->reg_list
[ARMV7M_xPSR
].valid
= true;
819 /* current = 1: continue on current pc, otherwise continue at <address> */
820 resume_pc
= buf_get_u32(arm
->pc
->value
, 0, 32);
822 resume_pc
= *address
;
824 *address
= resume_pc
;
826 /* Make sure that the Armv7 gdb thumb fixups does not
827 * kill the return address
829 switch (arm
->core_state
) {
831 resume_pc
&= 0xFFFFFFFC;
833 case ARM_STATE_THUMB
:
834 case ARM_STATE_THUMB_EE
:
835 /* When the return address is loaded into PC
836 * bit 0 must be 1 to stay in Thumb state
840 case ARM_STATE_JAZELLE
:
841 LOG_ERROR("How do I resume into Jazelle state??");
843 case ARM_STATE_AARCH64
:
844 LOG_ERROR("Shoudn't be in AARCH64 state");
847 LOG_DEBUG("resume pc = 0x%08" PRIx32
, resume_pc
);
848 buf_set_u32(arm
->pc
->value
, 0, 32, resume_pc
);
849 arm
->pc
->dirty
= true;
850 arm
->pc
->valid
= true;
852 /* restore dpm_mode at system halt */
853 arm_dpm_modeswitch(&armv7a
->dpm
, ARM_MODE_ANY
);
854 /* called it now before restoring context because it uses cpu
855 * register r0 for restoring cp15 control register */
856 retval
= cortex_a_restore_cp15_control_reg(target
);
857 if (retval
!= ERROR_OK
)
859 retval
= cortex_a_restore_context(target
, handle_breakpoints
);
860 if (retval
!= ERROR_OK
)
862 target
->debug_reason
= DBG_REASON_NOTHALTED
;
863 target
->state
= TARGET_RUNNING
;
865 /* registers are now invalid */
866 register_cache_invalidate(arm
->core_cache
);
869 /* the front-end may request us not to handle breakpoints */
870 if (handle_breakpoints
) {
871 /* Single step past breakpoint at current address */
872 breakpoint
= breakpoint_find(target
, resume_pc
);
874 LOG_DEBUG("unset breakpoint at 0x%8.8x", breakpoint
->address
);
875 cortex_m3_unset_breakpoint(target
, breakpoint
);
876 cortex_m3_single_step_core(target
);
877 cortex_m3_set_breakpoint(target
, breakpoint
);
885 static int cortex_a_internal_restart(struct target
*target
)
887 struct armv7a_common
*armv7a
= target_to_armv7a(target
);
888 struct arm
*arm
= &armv7a
->arm
;
892 * * Restart core and wait for it to be started. Clear ITRen and sticky
893 * * exception flags: see ARMv7 ARM, C5.9.
895 * REVISIT: for single stepping, we probably want to
896 * disable IRQs by default, with optional override...
899 retval
= mem_ap_read_atomic_u32(armv7a
->debug_ap
,
900 armv7a
->debug_base
+ CPUDBG_DSCR
, &dscr
);
901 if (retval
!= ERROR_OK
)
904 if ((dscr
& DSCR_INSTR_COMP
) == 0)
905 LOG_ERROR("DSCR InstrCompl must be set before leaving debug!");
907 retval
= mem_ap_write_atomic_u32(armv7a
->debug_ap
,
908 armv7a
->debug_base
+ CPUDBG_DSCR
, dscr
& ~DSCR_ITR_EN
);
909 if (retval
!= ERROR_OK
)
912 retval
= mem_ap_write_atomic_u32(armv7a
->debug_ap
,
913 armv7a
->debug_base
+ CPUDBG_DRCR
, DRCR_RESTART
|
914 DRCR_CLEAR_EXCEPTIONS
);
915 if (retval
!= ERROR_OK
)
918 int64_t then
= timeval_ms();
920 retval
= mem_ap_read_atomic_u32(armv7a
->debug_ap
,
921 armv7a
->debug_base
+ CPUDBG_DSCR
, &dscr
);
922 if (retval
!= ERROR_OK
)
924 if ((dscr
& DSCR_CORE_RESTARTED
) != 0)
926 if (timeval_ms() > then
+ 1000) {
927 LOG_ERROR("Timeout waiting for resume");
932 target
->debug_reason
= DBG_REASON_NOTHALTED
;
933 target
->state
= TARGET_RUNNING
;
935 /* registers are now invalid */
936 register_cache_invalidate(arm
->core_cache
);
941 static int cortex_a_restore_smp(struct target
*target
, int handle_breakpoints
)
944 struct target_list
*head
;
946 target_addr_t address
;
948 while (head
!= (struct target_list
*)NULL
) {
950 if ((curr
!= target
) && (curr
->state
!= TARGET_RUNNING
)
951 && target_was_examined(curr
)) {
952 /* resume current address , not in step mode */
953 retval
+= cortex_a_internal_restore(curr
, 1, &address
,
954 handle_breakpoints
, 0);
955 retval
+= cortex_a_internal_restart(curr
);
963 static int cortex_a_resume(struct target
*target
, int current
,
964 target_addr_t address
, int handle_breakpoints
, int debug_execution
)
967 /* dummy resume for smp toggle in order to reduce gdb impact */
968 if ((target
->smp
) && (target
->gdb_service
->core
[1] != -1)) {
969 /* simulate a start and halt of target */
970 target
->gdb_service
->target
= NULL
;
971 target
->gdb_service
->core
[0] = target
->gdb_service
->core
[1];
972 /* fake resume at next poll we play the target core[1], see poll*/
973 target_call_event_callbacks(target
, TARGET_EVENT_RESUMED
);
976 cortex_a_internal_restore(target
, current
, &address
, handle_breakpoints
, debug_execution
);
978 target
->gdb_service
->core
[0] = -1;
979 retval
= cortex_a_restore_smp(target
, handle_breakpoints
);
980 if (retval
!= ERROR_OK
)
983 cortex_a_internal_restart(target
);
985 if (!debug_execution
) {
986 target
->state
= TARGET_RUNNING
;
987 target_call_event_callbacks(target
, TARGET_EVENT_RESUMED
);
988 LOG_DEBUG("target resumed at " TARGET_ADDR_FMT
, address
);
990 target
->state
= TARGET_DEBUG_RUNNING
;
991 target_call_event_callbacks(target
, TARGET_EVENT_DEBUG_RESUMED
);
992 LOG_DEBUG("target debug resumed at " TARGET_ADDR_FMT
, address
);
998 static int cortex_a_debug_entry(struct target
*target
)
1001 int retval
= ERROR_OK
;
1002 struct cortex_a_common
*cortex_a
= target_to_cortex_a(target
);
1003 struct armv7a_common
*armv7a
= target_to_armv7a(target
);
1004 struct arm
*arm
= &armv7a
->arm
;
1006 LOG_DEBUG("dscr = 0x%08" PRIx32
, cortex_a
->cpudbg_dscr
);
1008 /* REVISIT surely we should not re-read DSCR !! */
1009 retval
= mem_ap_read_atomic_u32(armv7a
->debug_ap
,
1010 armv7a
->debug_base
+ CPUDBG_DSCR
, &dscr
);
1011 if (retval
!= ERROR_OK
)
1014 /* REVISIT see A TRM 12.11.4 steps 2..3 -- make sure that any
1015 * imprecise data aborts get discarded by issuing a Data
1016 * Synchronization Barrier: ARMV4_5_MCR(15, 0, 0, 7, 10, 4).
1019 /* Enable the ITR execution once we are in debug mode */
1020 dscr
|= DSCR_ITR_EN
;
1021 retval
= mem_ap_write_atomic_u32(armv7a
->debug_ap
,
1022 armv7a
->debug_base
+ CPUDBG_DSCR
, dscr
);
1023 if (retval
!= ERROR_OK
)
1026 /* Examine debug reason */
1027 arm_dpm_report_dscr(&armv7a
->dpm
, cortex_a
->cpudbg_dscr
);
1029 /* save address of instruction that triggered the watchpoint? */
1030 if (target
->debug_reason
== DBG_REASON_WATCHPOINT
) {
1033 retval
= mem_ap_read_atomic_u32(armv7a
->debug_ap
,
1034 armv7a
->debug_base
+ CPUDBG_WFAR
,
1036 if (retval
!= ERROR_OK
)
1038 arm_dpm_report_wfar(&armv7a
->dpm
, wfar
);
1041 /* First load register accessible through core debug port */
1042 retval
= arm_dpm_read_current_registers(&armv7a
->dpm
);
1043 if (retval
!= ERROR_OK
)
1048 retval
= arm_dpm_read_reg(&armv7a
->dpm
, arm
->spsr
, 17);
1049 if (retval
!= ERROR_OK
)
1054 /* TODO, Move this */
1055 uint32_t cp15_control_register
, cp15_cacr
, cp15_nacr
;
1056 cortex_a_read_cp(target
, &cp15_control_register
, 15, 0, 1, 0, 0);
1057 LOG_DEBUG("cp15_control_register = 0x%08x", cp15_control_register
);
1059 cortex_a_read_cp(target
, &cp15_cacr
, 15, 0, 1, 0, 2);
1060 LOG_DEBUG("cp15 Coprocessor Access Control Register = 0x%08x", cp15_cacr
);
1062 cortex_a_read_cp(target
, &cp15_nacr
, 15, 0, 1, 1, 2);
1063 LOG_DEBUG("cp15 Nonsecure Access Control Register = 0x%08x", cp15_nacr
);
1066 /* Are we in an exception handler */
1067 /* armv4_5->exception_number = 0; */
1068 if (armv7a
->post_debug_entry
) {
1069 retval
= armv7a
->post_debug_entry(target
);
1070 if (retval
!= ERROR_OK
)
1077 static int cortex_a_post_debug_entry(struct target
*target
)
1079 struct cortex_a_common
*cortex_a
= target_to_cortex_a(target
);
1080 struct armv7a_common
*armv7a
= &cortex_a
->armv7a_common
;
1083 /* MRC p15,0,<Rt>,c1,c0,0 ; Read CP15 System Control Register */
1084 retval
= armv7a
->arm
.mrc(target
, 15,
1085 0, 0, /* op1, op2 */
1086 1, 0, /* CRn, CRm */
1087 &cortex_a
->cp15_control_reg
);
1088 if (retval
!= ERROR_OK
)
1090 LOG_DEBUG("cp15_control_reg: %8.8" PRIx32
, cortex_a
->cp15_control_reg
);
1091 cortex_a
->cp15_control_reg_curr
= cortex_a
->cp15_control_reg
;
1093 if (!armv7a
->is_armv7r
)
1094 armv7a_read_ttbcr(target
);
1096 if (armv7a
->armv7a_mmu
.armv7a_cache
.info
== -1)
1097 armv7a_identify_cache(target
);
1099 if (armv7a
->is_armv7r
) {
1100 armv7a
->armv7a_mmu
.mmu_enabled
= 0;
1102 armv7a
->armv7a_mmu
.mmu_enabled
=
1103 (cortex_a
->cp15_control_reg
& 0x1U
) ? 1 : 0;
1105 armv7a
->armv7a_mmu
.armv7a_cache
.d_u_cache_enabled
=
1106 (cortex_a
->cp15_control_reg
& 0x4U
) ? 1 : 0;
1107 armv7a
->armv7a_mmu
.armv7a_cache
.i_cache_enabled
=
1108 (cortex_a
->cp15_control_reg
& 0x1000U
) ? 1 : 0;
1109 cortex_a
->curr_mode
= armv7a
->arm
.core_mode
;
1111 /* switch to SVC mode to read DACR */
1112 arm_dpm_modeswitch(&armv7a
->dpm
, ARM_MODE_SVC
);
1113 armv7a
->arm
.mrc(target
, 15,
1115 &cortex_a
->cp15_dacr_reg
);
1117 LOG_DEBUG("cp15_dacr_reg: %8.8" PRIx32
,
1118 cortex_a
->cp15_dacr_reg
);
1120 arm_dpm_modeswitch(&armv7a
->dpm
, ARM_MODE_ANY
);
1124 int cortex_a_set_dscr_bits(struct target
*target
, unsigned long bit_mask
, unsigned long value
)
1126 struct armv7a_common
*armv7a
= target_to_armv7a(target
);
1130 int retval
= mem_ap_read_atomic_u32(armv7a
->debug_ap
,
1131 armv7a
->debug_base
+ CPUDBG_DSCR
, &dscr
);
1132 if (ERROR_OK
!= retval
)
1135 /* clear bitfield */
1138 dscr
|= value
& bit_mask
;
1140 /* write new DSCR */
1141 retval
= mem_ap_write_atomic_u32(armv7a
->debug_ap
,
1142 armv7a
->debug_base
+ CPUDBG_DSCR
, dscr
);
1146 static int cortex_a_step(struct target
*target
, int current
, target_addr_t address
,
1147 int handle_breakpoints
)
1149 struct cortex_a_common
*cortex_a
= target_to_cortex_a(target
);
1150 struct armv7a_common
*armv7a
= target_to_armv7a(target
);
1151 struct arm
*arm
= &armv7a
->arm
;
1152 struct breakpoint
*breakpoint
= NULL
;
1153 struct breakpoint stepbreakpoint
;
1157 if (target
->state
!= TARGET_HALTED
) {
1158 LOG_WARNING("target not halted");
1159 return ERROR_TARGET_NOT_HALTED
;
1162 /* current = 1: continue on current pc, otherwise continue at <address> */
1165 buf_set_u32(r
->value
, 0, 32, address
);
1167 address
= buf_get_u32(r
->value
, 0, 32);
1169 /* The front-end may request us not to handle breakpoints.
1170 * But since Cortex-A uses breakpoint for single step,
1171 * we MUST handle breakpoints.
1173 handle_breakpoints
= 1;
1174 if (handle_breakpoints
) {
1175 breakpoint
= breakpoint_find(target
, address
);
1177 cortex_a_unset_breakpoint(target
, breakpoint
);
1180 /* Setup single step breakpoint */
1181 stepbreakpoint
.address
= address
;
1182 stepbreakpoint
.asid
= 0;
1183 stepbreakpoint
.length
= (arm
->core_state
== ARM_STATE_THUMB
)
1185 stepbreakpoint
.type
= BKPT_HARD
;
1186 stepbreakpoint
.set
= 0;
1188 /* Disable interrupts during single step if requested */
1189 if (cortex_a
->isrmasking_mode
== CORTEX_A_ISRMASK_ON
) {
1190 retval
= cortex_a_set_dscr_bits(target
, DSCR_INT_DIS
, DSCR_INT_DIS
);
1191 if (ERROR_OK
!= retval
)
1195 /* Break on IVA mismatch */
1196 cortex_a_set_breakpoint(target
, &stepbreakpoint
, 0x04);
1198 target
->debug_reason
= DBG_REASON_SINGLESTEP
;
1200 retval
= cortex_a_resume(target
, 1, address
, 0, 0);
1201 if (retval
!= ERROR_OK
)
1204 int64_t then
= timeval_ms();
1205 while (target
->state
!= TARGET_HALTED
) {
1206 retval
= cortex_a_poll(target
);
1207 if (retval
!= ERROR_OK
)
1209 if (timeval_ms() > then
+ 1000) {
1210 LOG_ERROR("timeout waiting for target halt");
1215 cortex_a_unset_breakpoint(target
, &stepbreakpoint
);
1217 /* Re-enable interrupts if they were disabled */
1218 if (cortex_a
->isrmasking_mode
== CORTEX_A_ISRMASK_ON
) {
1219 retval
= cortex_a_set_dscr_bits(target
, DSCR_INT_DIS
, 0);
1220 if (ERROR_OK
!= retval
)
1225 target
->debug_reason
= DBG_REASON_BREAKPOINT
;
1228 cortex_a_set_breakpoint(target
, breakpoint
, 0);
1230 if (target
->state
!= TARGET_HALTED
)
1231 LOG_DEBUG("target stepped");
1236 static int cortex_a_restore_context(struct target
*target
, bool bpwp
)
1238 struct armv7a_common
*armv7a
= target_to_armv7a(target
);
1242 if (armv7a
->pre_restore_context
)
1243 armv7a
->pre_restore_context(target
);
1245 return arm_dpm_write_dirty_registers(&armv7a
->dpm
, bpwp
);
1249 * Cortex-A Breakpoint and watchpoint functions
1252 /* Setup hardware Breakpoint Register Pair */
1253 static int cortex_a_set_breakpoint(struct target
*target
,
1254 struct breakpoint
*breakpoint
, uint8_t matchmode
)
1259 uint8_t byte_addr_select
= 0x0F;
1260 struct cortex_a_common
*cortex_a
= target_to_cortex_a(target
);
1261 struct armv7a_common
*armv7a
= &cortex_a
->armv7a_common
;
1262 struct cortex_a_brp
*brp_list
= cortex_a
->brp_list
;
1264 if (breakpoint
->set
) {
1265 LOG_WARNING("breakpoint already set");
1269 if (breakpoint
->type
== BKPT_HARD
) {
1270 while (brp_list
[brp_i
].used
&& (brp_i
< cortex_a
->brp_num
))
1272 if (brp_i
>= cortex_a
->brp_num
) {
1273 LOG_ERROR("ERROR Can not find free Breakpoint Register Pair");
1274 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
1276 breakpoint
->set
= brp_i
+ 1;
1277 if (breakpoint
->length
== 2)
1278 byte_addr_select
= (3 << (breakpoint
->address
& 0x02));
1279 control
= ((matchmode
& 0x7) << 20)
1280 | (byte_addr_select
<< 5)
1282 brp_list
[brp_i
].used
= 1;
1283 brp_list
[brp_i
].value
= (breakpoint
->address
& 0xFFFFFFFC);
1284 brp_list
[brp_i
].control
= control
;
1285 retval
= cortex_a_dap_write_memap_register_u32(target
, armv7a
->debug_base
1286 + CPUDBG_BVR_BASE
+ 4 * brp_list
[brp_i
].BRPn
,
1287 brp_list
[brp_i
].value
);
1288 if (retval
!= ERROR_OK
)
1290 retval
= cortex_a_dap_write_memap_register_u32(target
, armv7a
->debug_base
1291 + CPUDBG_BCR_BASE
+ 4 * brp_list
[brp_i
].BRPn
,
1292 brp_list
[brp_i
].control
);
1293 if (retval
!= ERROR_OK
)
1295 LOG_DEBUG("brp %i control 0x%0" PRIx32
" value 0x%0" PRIx32
, brp_i
,
1296 brp_list
[brp_i
].control
,
1297 brp_list
[brp_i
].value
);
1298 } else if (breakpoint
->type
== BKPT_SOFT
) {
1300 /* length == 2: Thumb breakpoint */
1301 if (breakpoint
->length
== 2)
1302 buf_set_u32(code
, 0, 32, ARMV5_T_BKPT(0x11));
1304 /* length == 3: Thumb-2 breakpoint, actual encoding is
1305 * a regular Thumb BKPT instruction but we replace a
1306 * 32bit Thumb-2 instruction, so fix-up the breakpoint
1309 if (breakpoint
->length
== 3) {
1310 buf_set_u32(code
, 0, 32, ARMV5_T_BKPT(0x11));
1311 breakpoint
->length
= 4;
1313 /* length == 4, normal ARM breakpoint */
1314 buf_set_u32(code
, 0, 32, ARMV5_BKPT(0x11));
1316 retval
= target_read_memory(target
,
1317 breakpoint
->address
& 0xFFFFFFFE,
1318 breakpoint
->length
, 1,
1319 breakpoint
->orig_instr
);
1320 if (retval
!= ERROR_OK
)
1323 /* make sure data cache is cleaned & invalidated down to PoC */
1324 if (!armv7a
->armv7a_mmu
.armv7a_cache
.auto_cache_enabled
) {
1325 armv7a_cache_flush_virt(target
, breakpoint
->address
,
1326 breakpoint
->length
);
1329 retval
= target_write_memory(target
,
1330 breakpoint
->address
& 0xFFFFFFFE,
1331 breakpoint
->length
, 1, code
);
1332 if (retval
!= ERROR_OK
)
1335 /* update i-cache at breakpoint location */
1336 armv7a_l1_d_cache_inval_virt(target
, breakpoint
->address
,
1337 breakpoint
->length
);
1338 armv7a_l1_i_cache_inval_virt(target
, breakpoint
->address
,
1339 breakpoint
->length
);
1341 breakpoint
->set
= 0x11; /* Any nice value but 0 */
1347 static int cortex_a_set_context_breakpoint(struct target
*target
,
1348 struct breakpoint
*breakpoint
, uint8_t matchmode
)
1350 int retval
= ERROR_FAIL
;
1353 uint8_t byte_addr_select
= 0x0F;
1354 struct cortex_a_common
*cortex_a
= target_to_cortex_a(target
);
1355 struct armv7a_common
*armv7a
= &cortex_a
->armv7a_common
;
1356 struct cortex_a_brp
*brp_list
= cortex_a
->brp_list
;
1358 if (breakpoint
->set
) {
1359 LOG_WARNING("breakpoint already set");
1362 /*check available context BRPs*/
1363 while ((brp_list
[brp_i
].used
||
1364 (brp_list
[brp_i
].type
!= BRP_CONTEXT
)) && (brp_i
< cortex_a
->brp_num
))
1367 if (brp_i
>= cortex_a
->brp_num
) {
1368 LOG_ERROR("ERROR Can not find free Breakpoint Register Pair");
1372 breakpoint
->set
= brp_i
+ 1;
1373 control
= ((matchmode
& 0x7) << 20)
1374 | (byte_addr_select
<< 5)
1376 brp_list
[brp_i
].used
= 1;
1377 brp_list
[brp_i
].value
= (breakpoint
->asid
);
1378 brp_list
[brp_i
].control
= control
;
1379 retval
= cortex_a_dap_write_memap_register_u32(target
, armv7a
->debug_base
1380 + CPUDBG_BVR_BASE
+ 4 * brp_list
[brp_i
].BRPn
,
1381 brp_list
[brp_i
].value
);
1382 if (retval
!= ERROR_OK
)
1384 retval
= cortex_a_dap_write_memap_register_u32(target
, armv7a
->debug_base
1385 + CPUDBG_BCR_BASE
+ 4 * brp_list
[brp_i
].BRPn
,
1386 brp_list
[brp_i
].control
);
1387 if (retval
!= ERROR_OK
)
1389 LOG_DEBUG("brp %i control 0x%0" PRIx32
" value 0x%0" PRIx32
, brp_i
,
1390 brp_list
[brp_i
].control
,
1391 brp_list
[brp_i
].value
);
1396 static int cortex_a_set_hybrid_breakpoint(struct target
*target
, struct breakpoint
*breakpoint
)
1398 int retval
= ERROR_FAIL
;
1399 int brp_1
= 0; /* holds the contextID pair */
1400 int brp_2
= 0; /* holds the IVA pair */
1401 uint32_t control_CTX
, control_IVA
;
1402 uint8_t CTX_byte_addr_select
= 0x0F;
1403 uint8_t IVA_byte_addr_select
= 0x0F;
1404 uint8_t CTX_machmode
= 0x03;
1405 uint8_t IVA_machmode
= 0x01;
1406 struct cortex_a_common
*cortex_a
= target_to_cortex_a(target
);
1407 struct armv7a_common
*armv7a
= &cortex_a
->armv7a_common
;
1408 struct cortex_a_brp
*brp_list
= cortex_a
->brp_list
;
1410 if (breakpoint
->set
) {
1411 LOG_WARNING("breakpoint already set");
1414 /*check available context BRPs*/
1415 while ((brp_list
[brp_1
].used
||
1416 (brp_list
[brp_1
].type
!= BRP_CONTEXT
)) && (brp_1
< cortex_a
->brp_num
))
1419 printf("brp(CTX) found num: %d\n", brp_1
);
1420 if (brp_1
>= cortex_a
->brp_num
) {
1421 LOG_ERROR("ERROR Can not find free Breakpoint Register Pair");
1425 while ((brp_list
[brp_2
].used
||
1426 (brp_list
[brp_2
].type
!= BRP_NORMAL
)) && (brp_2
< cortex_a
->brp_num
))
1429 printf("brp(IVA) found num: %d\n", brp_2
);
1430 if (brp_2
>= cortex_a
->brp_num
) {
1431 LOG_ERROR("ERROR Can not find free Breakpoint Register Pair");
1435 breakpoint
->set
= brp_1
+ 1;
1436 breakpoint
->linked_BRP
= brp_2
;
1437 control_CTX
= ((CTX_machmode
& 0x7) << 20)
1440 | (CTX_byte_addr_select
<< 5)
1442 brp_list
[brp_1
].used
= 1;
1443 brp_list
[brp_1
].value
= (breakpoint
->asid
);
1444 brp_list
[brp_1
].control
= control_CTX
;
1445 retval
= cortex_a_dap_write_memap_register_u32(target
, armv7a
->debug_base
1446 + CPUDBG_BVR_BASE
+ 4 * brp_list
[brp_1
].BRPn
,
1447 brp_list
[brp_1
].value
);
1448 if (retval
!= ERROR_OK
)
1450 retval
= cortex_a_dap_write_memap_register_u32(target
, armv7a
->debug_base
1451 + CPUDBG_BCR_BASE
+ 4 * brp_list
[brp_1
].BRPn
,
1452 brp_list
[brp_1
].control
);
1453 if (retval
!= ERROR_OK
)
1456 control_IVA
= ((IVA_machmode
& 0x7) << 20)
1458 | (IVA_byte_addr_select
<< 5)
1460 brp_list
[brp_2
].used
= 1;
1461 brp_list
[brp_2
].value
= (breakpoint
->address
& 0xFFFFFFFC);
1462 brp_list
[brp_2
].control
= control_IVA
;
1463 retval
= cortex_a_dap_write_memap_register_u32(target
, armv7a
->debug_base
1464 + CPUDBG_BVR_BASE
+ 4 * brp_list
[brp_2
].BRPn
,
1465 brp_list
[brp_2
].value
);
1466 if (retval
!= ERROR_OK
)
1468 retval
= cortex_a_dap_write_memap_register_u32(target
, armv7a
->debug_base
1469 + CPUDBG_BCR_BASE
+ 4 * brp_list
[brp_2
].BRPn
,
1470 brp_list
[brp_2
].control
);
1471 if (retval
!= ERROR_OK
)
1477 static int cortex_a_unset_breakpoint(struct target
*target
, struct breakpoint
*breakpoint
)
1480 struct cortex_a_common
*cortex_a
= target_to_cortex_a(target
);
1481 struct armv7a_common
*armv7a
= &cortex_a
->armv7a_common
;
1482 struct cortex_a_brp
*brp_list
= cortex_a
->brp_list
;
1484 if (!breakpoint
->set
) {
1485 LOG_WARNING("breakpoint not set");
1489 if (breakpoint
->type
== BKPT_HARD
) {
1490 if ((breakpoint
->address
!= 0) && (breakpoint
->asid
!= 0)) {
1491 int brp_i
= breakpoint
->set
- 1;
1492 int brp_j
= breakpoint
->linked_BRP
;
1493 if ((brp_i
< 0) || (brp_i
>= cortex_a
->brp_num
)) {
1494 LOG_DEBUG("Invalid BRP number in breakpoint");
1497 LOG_DEBUG("rbp %i control 0x%0" PRIx32
" value 0x%0" PRIx32
, brp_i
,
1498 brp_list
[brp_i
].control
, brp_list
[brp_i
].value
);
1499 brp_list
[brp_i
].used
= 0;
1500 brp_list
[brp_i
].value
= 0;
1501 brp_list
[brp_i
].control
= 0;
1502 retval
= cortex_a_dap_write_memap_register_u32(target
, armv7a
->debug_base
1503 + CPUDBG_BCR_BASE
+ 4 * brp_list
[brp_i
].BRPn
,
1504 brp_list
[brp_i
].control
);
1505 if (retval
!= ERROR_OK
)
1507 retval
= cortex_a_dap_write_memap_register_u32(target
, armv7a
->debug_base
1508 + CPUDBG_BVR_BASE
+ 4 * brp_list
[brp_i
].BRPn
,
1509 brp_list
[brp_i
].value
);
1510 if (retval
!= ERROR_OK
)
1512 if ((brp_j
< 0) || (brp_j
>= cortex_a
->brp_num
)) {
1513 LOG_DEBUG("Invalid BRP number in breakpoint");
1516 LOG_DEBUG("rbp %i control 0x%0" PRIx32
" value 0x%0" PRIx32
, brp_j
,
1517 brp_list
[brp_j
].control
, brp_list
[brp_j
].value
);
1518 brp_list
[brp_j
].used
= 0;
1519 brp_list
[brp_j
].value
= 0;
1520 brp_list
[brp_j
].control
= 0;
1521 retval
= cortex_a_dap_write_memap_register_u32(target
, armv7a
->debug_base
1522 + CPUDBG_BCR_BASE
+ 4 * brp_list
[brp_j
].BRPn
,
1523 brp_list
[brp_j
].control
);
1524 if (retval
!= ERROR_OK
)
1526 retval
= cortex_a_dap_write_memap_register_u32(target
, armv7a
->debug_base
1527 + CPUDBG_BVR_BASE
+ 4 * brp_list
[brp_j
].BRPn
,
1528 brp_list
[brp_j
].value
);
1529 if (retval
!= ERROR_OK
)
1531 breakpoint
->linked_BRP
= 0;
1532 breakpoint
->set
= 0;
1536 int brp_i
= breakpoint
->set
- 1;
1537 if ((brp_i
< 0) || (brp_i
>= cortex_a
->brp_num
)) {
1538 LOG_DEBUG("Invalid BRP number in breakpoint");
1541 LOG_DEBUG("rbp %i control 0x%0" PRIx32
" value 0x%0" PRIx32
, brp_i
,
1542 brp_list
[brp_i
].control
, brp_list
[brp_i
].value
);
1543 brp_list
[brp_i
].used
= 0;
1544 brp_list
[brp_i
].value
= 0;
1545 brp_list
[brp_i
].control
= 0;
1546 retval
= cortex_a_dap_write_memap_register_u32(target
, armv7a
->debug_base
1547 + CPUDBG_BCR_BASE
+ 4 * brp_list
[brp_i
].BRPn
,
1548 brp_list
[brp_i
].control
);
1549 if (retval
!= ERROR_OK
)
1551 retval
= cortex_a_dap_write_memap_register_u32(target
, armv7a
->debug_base
1552 + CPUDBG_BVR_BASE
+ 4 * brp_list
[brp_i
].BRPn
,
1553 brp_list
[brp_i
].value
);
1554 if (retval
!= ERROR_OK
)
1556 breakpoint
->set
= 0;
1561 /* make sure data cache is cleaned & invalidated down to PoC */
1562 if (!armv7a
->armv7a_mmu
.armv7a_cache
.auto_cache_enabled
) {
1563 armv7a_cache_flush_virt(target
, breakpoint
->address
,
1564 breakpoint
->length
);
1567 /* restore original instruction (kept in target endianness) */
1568 if (breakpoint
->length
== 4) {
1569 retval
= target_write_memory(target
,
1570 breakpoint
->address
& 0xFFFFFFFE,
1571 4, 1, breakpoint
->orig_instr
);
1572 if (retval
!= ERROR_OK
)
1575 retval
= target_write_memory(target
,
1576 breakpoint
->address
& 0xFFFFFFFE,
1577 2, 1, breakpoint
->orig_instr
);
1578 if (retval
!= ERROR_OK
)
1582 /* update i-cache at breakpoint location */
1583 armv7a_l1_d_cache_inval_virt(target
, breakpoint
->address
,
1584 breakpoint
->length
);
1585 armv7a_l1_i_cache_inval_virt(target
, breakpoint
->address
,
1586 breakpoint
->length
);
1588 breakpoint
->set
= 0;
1593 static int cortex_a_add_breakpoint(struct target
*target
,
1594 struct breakpoint
*breakpoint
)
1596 struct cortex_a_common
*cortex_a
= target_to_cortex_a(target
);
1598 if ((breakpoint
->type
== BKPT_HARD
) && (cortex_a
->brp_num_available
< 1)) {
1599 LOG_INFO("no hardware breakpoint available");
1600 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
1603 if (breakpoint
->type
== BKPT_HARD
)
1604 cortex_a
->brp_num_available
--;
1606 return cortex_a_set_breakpoint(target
, breakpoint
, 0x00); /* Exact match */
1609 static int cortex_a_add_context_breakpoint(struct target
*target
,
1610 struct breakpoint
*breakpoint
)
1612 struct cortex_a_common
*cortex_a
= target_to_cortex_a(target
);
1614 if ((breakpoint
->type
== BKPT_HARD
) && (cortex_a
->brp_num_available
< 1)) {
1615 LOG_INFO("no hardware breakpoint available");
1616 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
1619 if (breakpoint
->type
== BKPT_HARD
)
1620 cortex_a
->brp_num_available
--;
1622 return cortex_a_set_context_breakpoint(target
, breakpoint
, 0x02); /* asid match */
1625 static int cortex_a_add_hybrid_breakpoint(struct target
*target
,
1626 struct breakpoint
*breakpoint
)
1628 struct cortex_a_common
*cortex_a
= target_to_cortex_a(target
);
1630 if ((breakpoint
->type
== BKPT_HARD
) && (cortex_a
->brp_num_available
< 1)) {
1631 LOG_INFO("no hardware breakpoint available");
1632 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
1635 if (breakpoint
->type
== BKPT_HARD
)
1636 cortex_a
->brp_num_available
--;
1638 return cortex_a_set_hybrid_breakpoint(target
, breakpoint
); /* ??? */
1642 static int cortex_a_remove_breakpoint(struct target
*target
, struct breakpoint
*breakpoint
)
1644 struct cortex_a_common
*cortex_a
= target_to_cortex_a(target
);
1647 /* It is perfectly possible to remove breakpoints while the target is running */
1648 if (target
->state
!= TARGET_HALTED
) {
1649 LOG_WARNING("target not halted");
1650 return ERROR_TARGET_NOT_HALTED
;
1654 if (breakpoint
->set
) {
1655 cortex_a_unset_breakpoint(target
, breakpoint
);
1656 if (breakpoint
->type
== BKPT_HARD
)
1657 cortex_a
->brp_num_available
++;
1665 * Cortex-A Reset functions
1668 static int cortex_a_assert_reset(struct target
*target
)
1670 struct armv7a_common
*armv7a
= target_to_armv7a(target
);
1674 /* FIXME when halt is requested, make it work somehow... */
1676 /* This function can be called in "target not examined" state */
1678 /* Issue some kind of warm reset. */
1679 if (target_has_event_action(target
, TARGET_EVENT_RESET_ASSERT
))
1680 target_handle_event(target
, TARGET_EVENT_RESET_ASSERT
);
1681 else if (jtag_get_reset_config() & RESET_HAS_SRST
) {
1682 /* REVISIT handle "pulls" cases, if there's
1683 * hardware that needs them to work.
1687 * FIXME: fix reset when transport is SWD. This is a temporary
1688 * work-around for release v0.10 that is not intended to stay!
1690 if (transport_is_swd() ||
1691 (target
->reset_halt
&& (jtag_get_reset_config() & RESET_SRST_NO_GATING
)))
1692 jtag_add_reset(0, 1);
1695 LOG_ERROR("%s: how to reset?", target_name(target
));
1699 /* registers are now invalid */
1700 if (target_was_examined(target
))
1701 register_cache_invalidate(armv7a
->arm
.core_cache
);
1703 target
->state
= TARGET_RESET
;
1708 static int cortex_a_deassert_reset(struct target
*target
)
1714 /* be certain SRST is off */
1715 jtag_add_reset(0, 0);
1717 if (target_was_examined(target
)) {
1718 retval
= cortex_a_poll(target
);
1719 if (retval
!= ERROR_OK
)
1723 if (target
->reset_halt
) {
1724 if (target
->state
!= TARGET_HALTED
) {
1725 LOG_WARNING("%s: ran after reset and before halt ...",
1726 target_name(target
));
1727 if (target_was_examined(target
)) {
1728 retval
= target_halt(target
);
1729 if (retval
!= ERROR_OK
)
1732 target
->state
= TARGET_UNKNOWN
;
1739 static int cortex_a_set_dcc_mode(struct target
*target
, uint32_t mode
, uint32_t *dscr
)
1741 /* Changes the mode of the DCC between non-blocking, stall, and fast mode.
1742 * New desired mode must be in mode. Current value of DSCR must be in
1743 * *dscr, which is updated with new value.
1745 * This function elides actually sending the mode-change over the debug
1746 * interface if the mode is already set as desired.
1748 uint32_t new_dscr
= (*dscr
& ~DSCR_EXT_DCC_MASK
) | mode
;
1749 if (new_dscr
!= *dscr
) {
1750 struct armv7a_common
*armv7a
= target_to_armv7a(target
);
1751 int retval
= mem_ap_write_atomic_u32(armv7a
->debug_ap
,
1752 armv7a
->debug_base
+ CPUDBG_DSCR
, new_dscr
);
1753 if (retval
== ERROR_OK
)
1761 static int cortex_a_wait_dscr_bits(struct target
*target
, uint32_t mask
,
1762 uint32_t value
, uint32_t *dscr
)
1764 /* Waits until the specified bit(s) of DSCR take on a specified value. */
1765 struct armv7a_common
*armv7a
= target_to_armv7a(target
);
1766 int64_t then
= timeval_ms();
1769 while ((*dscr
& mask
) != value
) {
1770 retval
= mem_ap_read_atomic_u32(armv7a
->debug_ap
,
1771 armv7a
->debug_base
+ CPUDBG_DSCR
, dscr
);
1772 if (retval
!= ERROR_OK
)
1774 if (timeval_ms() > then
+ 1000) {
1775 LOG_ERROR("timeout waiting for DSCR bit change");
1782 static int cortex_a_read_copro(struct target
*target
, uint32_t opcode
,
1783 uint32_t *data
, uint32_t *dscr
)
1786 struct armv7a_common
*armv7a
= target_to_armv7a(target
);
1788 /* Move from coprocessor to R0. */
1789 retval
= cortex_a_exec_opcode(target
, opcode
, dscr
);
1790 if (retval
!= ERROR_OK
)
1793 /* Move from R0 to DTRTX. */
1794 retval
= cortex_a_exec_opcode(target
, ARMV4_5_MCR(14, 0, 0, 0, 5, 0), dscr
);
1795 if (retval
!= ERROR_OK
)
1798 /* Wait until DTRTX is full (according to ARMv7-A/-R architecture
1799 * manual section C8.4.3, checking InstrCmpl_l is not sufficient; one
1800 * must also check TXfull_l). Most of the time this will be free
1801 * because TXfull_l will be set immediately and cached in dscr. */
1802 retval
= cortex_a_wait_dscr_bits(target
, DSCR_DTRTX_FULL_LATCHED
,
1803 DSCR_DTRTX_FULL_LATCHED
, dscr
);
1804 if (retval
!= ERROR_OK
)
1807 /* Read the value transferred to DTRTX. */
1808 retval
= mem_ap_read_atomic_u32(armv7a
->debug_ap
,
1809 armv7a
->debug_base
+ CPUDBG_DTRTX
, data
);
1810 if (retval
!= ERROR_OK
)
1816 static int cortex_a_read_dfar_dfsr(struct target
*target
, uint32_t *dfar
,
1817 uint32_t *dfsr
, uint32_t *dscr
)
1822 retval
= cortex_a_read_copro(target
, ARMV4_5_MRC(15, 0, 0, 6, 0, 0), dfar
, dscr
);
1823 if (retval
!= ERROR_OK
)
1828 retval
= cortex_a_read_copro(target
, ARMV4_5_MRC(15, 0, 0, 5, 0, 0), dfsr
, dscr
);
1829 if (retval
!= ERROR_OK
)
1836 static int cortex_a_write_copro(struct target
*target
, uint32_t opcode
,
1837 uint32_t data
, uint32_t *dscr
)
1840 struct armv7a_common
*armv7a
= target_to_armv7a(target
);
1842 /* Write the value into DTRRX. */
1843 retval
= mem_ap_write_atomic_u32(armv7a
->debug_ap
,
1844 armv7a
->debug_base
+ CPUDBG_DTRRX
, data
);
1845 if (retval
!= ERROR_OK
)
1848 /* Move from DTRRX to R0. */
1849 retval
= cortex_a_exec_opcode(target
, ARMV4_5_MRC(14, 0, 0, 0, 5, 0), dscr
);
1850 if (retval
!= ERROR_OK
)
1853 /* Move from R0 to coprocessor. */
1854 retval
= cortex_a_exec_opcode(target
, opcode
, dscr
);
1855 if (retval
!= ERROR_OK
)
1858 /* Wait until DTRRX is empty (according to ARMv7-A/-R architecture manual
1859 * section C8.4.3, checking InstrCmpl_l is not sufficient; one must also
1860 * check RXfull_l). Most of the time this will be free because RXfull_l
1861 * will be cleared immediately and cached in dscr. */
1862 retval
= cortex_a_wait_dscr_bits(target
, DSCR_DTRRX_FULL_LATCHED
, 0, dscr
);
1863 if (retval
!= ERROR_OK
)
1869 static int cortex_a_write_dfar_dfsr(struct target
*target
, uint32_t dfar
,
1870 uint32_t dfsr
, uint32_t *dscr
)
1874 retval
= cortex_a_write_copro(target
, ARMV4_5_MCR(15, 0, 0, 6, 0, 0), dfar
, dscr
);
1875 if (retval
!= ERROR_OK
)
1878 retval
= cortex_a_write_copro(target
, ARMV4_5_MCR(15, 0, 0, 5, 0, 0), dfsr
, dscr
);
1879 if (retval
!= ERROR_OK
)
1885 static int cortex_a_dfsr_to_error_code(uint32_t dfsr
)
1887 uint32_t status
, upper4
;
1889 if (dfsr
& (1 << 9)) {
1891 status
= dfsr
& 0x3f;
1892 upper4
= status
>> 2;
1893 if (upper4
== 1 || upper4
== 2 || upper4
== 3 || upper4
== 15)
1894 return ERROR_TARGET_TRANSLATION_FAULT
;
1895 else if (status
== 33)
1896 return ERROR_TARGET_UNALIGNED_ACCESS
;
1898 return ERROR_TARGET_DATA_ABORT
;
1900 /* Normal format. */
1901 status
= ((dfsr
>> 6) & 0x10) | (dfsr
& 0xf);
1903 return ERROR_TARGET_UNALIGNED_ACCESS
;
1904 else if (status
== 5 || status
== 7 || status
== 3 || status
== 6 ||
1905 status
== 9 || status
== 11 || status
== 13 || status
== 15)
1906 return ERROR_TARGET_TRANSLATION_FAULT
;
1908 return ERROR_TARGET_DATA_ABORT
;
1912 static int cortex_a_write_cpu_memory_slow(struct target
*target
,
1913 uint32_t size
, uint32_t count
, const uint8_t *buffer
, uint32_t *dscr
)
1915 /* Writes count objects of size size from *buffer. Old value of DSCR must
1916 * be in *dscr; updated to new value. This is slow because it works for
1917 * non-word-sized objects and (maybe) unaligned accesses. If size == 4 and
1918 * the address is aligned, cortex_a_write_cpu_memory_fast should be
1921 * - Address is in R0.
1922 * - R0 is marked dirty.
1924 struct armv7a_common
*armv7a
= target_to_armv7a(target
);
1925 struct arm
*arm
= &armv7a
->arm
;
1928 /* Mark register R1 as dirty, to use for transferring data. */
1929 arm_reg_current(arm
, 1)->dirty
= true;
1931 /* Switch to non-blocking mode if not already in that mode. */
1932 retval
= cortex_a_set_dcc_mode(target
, DSCR_EXT_DCC_NON_BLOCKING
, dscr
);
1933 if (retval
!= ERROR_OK
)
1936 /* Go through the objects. */
1938 /* Write the value to store into DTRRX. */
1939 uint32_t data
, opcode
;
1943 data
= target_buffer_get_u16(target
, buffer
);
1945 data
= target_buffer_get_u32(target
, buffer
);
1946 retval
= mem_ap_write_atomic_u32(armv7a
->debug_ap
,
1947 armv7a
->debug_base
+ CPUDBG_DTRRX
, data
);
1948 if (retval
!= ERROR_OK
)
1951 /* Transfer the value from DTRRX to R1. */
1952 retval
= cortex_a_exec_opcode(target
, ARMV4_5_MRC(14, 0, 1, 0, 5, 0), dscr
);
1953 if (retval
!= ERROR_OK
)
1956 /* Write the value transferred to R1 into memory. */
1958 opcode
= ARMV4_5_STRB_IP(1, 0);
1960 opcode
= ARMV4_5_STRH_IP(1, 0);
1962 opcode
= ARMV4_5_STRW_IP(1, 0);
1963 retval
= cortex_a_exec_opcode(target
, opcode
, dscr
);
1964 if (retval
!= ERROR_OK
)
1967 /* Check for faults and return early. */
1968 if (*dscr
& (DSCR_STICKY_ABORT_PRECISE
| DSCR_STICKY_ABORT_IMPRECISE
))
1969 return ERROR_OK
; /* A data fault is not considered a system failure. */
1971 /* Wait until DTRRX is empty (according to ARMv7-A/-R architecture
1972 * manual section C8.4.3, checking InstrCmpl_l is not sufficient; one
1973 * must also check RXfull_l). Most of the time this will be free
1974 * because RXfull_l will be cleared immediately and cached in dscr. */
1975 retval
= cortex_a_wait_dscr_bits(target
, DSCR_DTRRX_FULL_LATCHED
, 0, dscr
);
1976 if (retval
!= ERROR_OK
)
1987 static int cortex_a_write_cpu_memory_fast(struct target
*target
,
1988 uint32_t count
, const uint8_t *buffer
, uint32_t *dscr
)
1990 /* Writes count objects of size 4 from *buffer. Old value of DSCR must be
1991 * in *dscr; updated to new value. This is fast but only works for
1992 * word-sized objects at aligned addresses.
1994 * - Address is in R0 and must be a multiple of 4.
1995 * - R0 is marked dirty.
1997 struct armv7a_common
*armv7a
= target_to_armv7a(target
);
2000 /* Switch to fast mode if not already in that mode. */
2001 retval
= cortex_a_set_dcc_mode(target
, DSCR_EXT_DCC_FAST_MODE
, dscr
);
2002 if (retval
!= ERROR_OK
)
2005 /* Latch STC instruction. */
2006 retval
= mem_ap_write_atomic_u32(armv7a
->debug_ap
,
2007 armv7a
->debug_base
+ CPUDBG_ITR
, ARMV4_5_STC(0, 1, 0, 1, 14, 5, 0, 4));
2008 if (retval
!= ERROR_OK
)
2011 /* Transfer all the data and issue all the instructions. */
2012 return mem_ap_write_buf_noincr(armv7a
->debug_ap
, buffer
,
2013 4, count
, armv7a
->debug_base
+ CPUDBG_DTRRX
);
2016 static int cortex_a_write_cpu_memory(struct target
*target
,
2017 uint32_t address
, uint32_t size
,
2018 uint32_t count
, const uint8_t *buffer
)
2020 /* Write memory through the CPU. */
2021 int retval
, final_retval
;
2022 struct armv7a_common
*armv7a
= target_to_armv7a(target
);
2023 struct arm
*arm
= &armv7a
->arm
;
2024 uint32_t dscr
, orig_dfar
, orig_dfsr
, fault_dscr
, fault_dfar
, fault_dfsr
;
2026 LOG_DEBUG("Writing CPU memory address 0x%" PRIx32
" size %" PRIu32
" count %" PRIu32
,
2027 address
, size
, count
);
2028 if (target
->state
!= TARGET_HALTED
) {
2029 LOG_WARNING("target not halted");
2030 return ERROR_TARGET_NOT_HALTED
;
2036 /* Clear any abort. */
2037 retval
= mem_ap_write_atomic_u32(armv7a
->debug_ap
,
2038 armv7a
->debug_base
+ CPUDBG_DRCR
, DRCR_CLEAR_EXCEPTIONS
);
2039 if (retval
!= ERROR_OK
)
2043 retval
= mem_ap_read_atomic_u32(armv7a
->debug_ap
,
2044 armv7a
->debug_base
+ CPUDBG_DSCR
, &dscr
);
2045 if (retval
!= ERROR_OK
)
2048 /* Switch to non-blocking mode if not already in that mode. */
2049 retval
= cortex_a_set_dcc_mode(target
, DSCR_EXT_DCC_NON_BLOCKING
, &dscr
);
2050 if (retval
!= ERROR_OK
)
2053 /* Mark R0 as dirty. */
2054 arm_reg_current(arm
, 0)->dirty
= true;
2056 /* Read DFAR and DFSR, as they will be modified in the event of a fault. */
2057 retval
= cortex_a_read_dfar_dfsr(target
, &orig_dfar
, &orig_dfsr
, &dscr
);
2058 if (retval
!= ERROR_OK
)
2061 /* Get the memory address into R0. */
2062 retval
= mem_ap_write_atomic_u32(armv7a
->debug_ap
,
2063 armv7a
->debug_base
+ CPUDBG_DTRRX
, address
);
2064 if (retval
!= ERROR_OK
)
2066 retval
= cortex_a_exec_opcode(target
, ARMV4_5_MRC(14, 0, 0, 0, 5, 0), &dscr
);
2067 if (retval
!= ERROR_OK
)
2070 if (size
== 4 && (address
% 4) == 0) {
2071 /* We are doing a word-aligned transfer, so use fast mode. */
2072 retval
= cortex_a_write_cpu_memory_fast(target
, count
, buffer
, &dscr
);
2074 /* Use slow path. */
2075 retval
= cortex_a_write_cpu_memory_slow(target
, size
, count
, buffer
, &dscr
);
2079 final_retval
= retval
;
2081 /* Switch to non-blocking mode if not already in that mode. */
2082 retval
= cortex_a_set_dcc_mode(target
, DSCR_EXT_DCC_NON_BLOCKING
, &dscr
);
2083 if (final_retval
== ERROR_OK
)
2084 final_retval
= retval
;
2086 /* Wait for last issued instruction to complete. */
2087 retval
= cortex_a_wait_instrcmpl(target
, &dscr
, true);
2088 if (final_retval
== ERROR_OK
)
2089 final_retval
= retval
;
2091 /* Wait until DTRRX is empty (according to ARMv7-A/-R architecture manual
2092 * section C8.4.3, checking InstrCmpl_l is not sufficient; one must also
2093 * check RXfull_l). Most of the time this will be free because RXfull_l
2094 * will be cleared immediately and cached in dscr. However, don't do this
2095 * if there is fault, because then the instruction might not have completed
2097 if (!(dscr
& DSCR_STICKY_ABORT_PRECISE
)) {
2098 retval
= cortex_a_wait_dscr_bits(target
, DSCR_DTRRX_FULL_LATCHED
, 0, &dscr
);
2099 if (retval
!= ERROR_OK
)
2103 /* If there were any sticky abort flags, clear them. */
2104 if (dscr
& (DSCR_STICKY_ABORT_PRECISE
| DSCR_STICKY_ABORT_IMPRECISE
)) {
2106 mem_ap_write_atomic_u32(armv7a
->debug_ap
,
2107 armv7a
->debug_base
+ CPUDBG_DRCR
, DRCR_CLEAR_EXCEPTIONS
);
2108 dscr
&= ~(DSCR_STICKY_ABORT_PRECISE
| DSCR_STICKY_ABORT_IMPRECISE
);
2113 /* Handle synchronous data faults. */
2114 if (fault_dscr
& DSCR_STICKY_ABORT_PRECISE
) {
2115 if (final_retval
== ERROR_OK
) {
2116 /* Final return value will reflect cause of fault. */
2117 retval
= cortex_a_read_dfar_dfsr(target
, &fault_dfar
, &fault_dfsr
, &dscr
);
2118 if (retval
== ERROR_OK
) {
2119 LOG_ERROR("data abort at 0x%08" PRIx32
", dfsr = 0x%08" PRIx32
, fault_dfar
, fault_dfsr
);
2120 final_retval
= cortex_a_dfsr_to_error_code(fault_dfsr
);
2122 final_retval
= retval
;
2124 /* Fault destroyed DFAR/DFSR; restore them. */
2125 retval
= cortex_a_write_dfar_dfsr(target
, orig_dfar
, orig_dfsr
, &dscr
);
2126 if (retval
!= ERROR_OK
)
2127 LOG_ERROR("error restoring dfar/dfsr - dscr = 0x%08" PRIx32
, dscr
);
2130 /* Handle asynchronous data faults. */
2131 if (fault_dscr
& DSCR_STICKY_ABORT_IMPRECISE
) {
2132 if (final_retval
== ERROR_OK
)
2133 /* No other error has been recorded so far, so keep this one. */
2134 final_retval
= ERROR_TARGET_DATA_ABORT
;
2137 /* If the DCC is nonempty, clear it. */
2138 if (dscr
& DSCR_DTRTX_FULL_LATCHED
) {
2140 retval
= mem_ap_read_atomic_u32(armv7a
->debug_ap
,
2141 armv7a
->debug_base
+ CPUDBG_DTRTX
, &dummy
);
2142 if (final_retval
== ERROR_OK
)
2143 final_retval
= retval
;
2145 if (dscr
& DSCR_DTRRX_FULL_LATCHED
) {
2146 retval
= cortex_a_exec_opcode(target
, ARMV4_5_MRC(14, 0, 1, 0, 5, 0), &dscr
);
2147 if (final_retval
== ERROR_OK
)
2148 final_retval
= retval
;
2152 return final_retval
;
2155 static int cortex_a_read_cpu_memory_slow(struct target
*target
,
2156 uint32_t size
, uint32_t count
, uint8_t *buffer
, uint32_t *dscr
)
2158 /* Reads count objects of size size into *buffer. Old value of DSCR must be
2159 * in *dscr; updated to new value. This is slow because it works for
2160 * non-word-sized objects and (maybe) unaligned accesses. If size == 4 and
2161 * the address is aligned, cortex_a_read_cpu_memory_fast should be
2164 * - Address is in R0.
2165 * - R0 is marked dirty.
2167 struct armv7a_common
*armv7a
= target_to_armv7a(target
);
2168 struct arm
*arm
= &armv7a
->arm
;
2171 /* Mark register R1 as dirty, to use for transferring data. */
2172 arm_reg_current(arm
, 1)->dirty
= true;
2174 /* Switch to non-blocking mode if not already in that mode. */
2175 retval
= cortex_a_set_dcc_mode(target
, DSCR_EXT_DCC_NON_BLOCKING
, dscr
);
2176 if (retval
!= ERROR_OK
)
2179 /* Go through the objects. */
2181 /* Issue a load of the appropriate size to R1. */
2182 uint32_t opcode
, data
;
2184 opcode
= ARMV4_5_LDRB_IP(1, 0);
2186 opcode
= ARMV4_5_LDRH_IP(1, 0);
2188 opcode
= ARMV4_5_LDRW_IP(1, 0);
2189 retval
= cortex_a_exec_opcode(target
, opcode
, dscr
);
2190 if (retval
!= ERROR_OK
)
2193 /* Issue a write of R1 to DTRTX. */
2194 retval
= cortex_a_exec_opcode(target
, ARMV4_5_MCR(14, 0, 1, 0, 5, 0), dscr
);
2195 if (retval
!= ERROR_OK
)
2198 /* Check for faults and return early. */
2199 if (*dscr
& (DSCR_STICKY_ABORT_PRECISE
| DSCR_STICKY_ABORT_IMPRECISE
))
2200 return ERROR_OK
; /* A data fault is not considered a system failure. */
2202 /* Wait until DTRTX is full (according to ARMv7-A/-R architecture
2203 * manual section C8.4.3, checking InstrCmpl_l is not sufficient; one
2204 * must also check TXfull_l). Most of the time this will be free
2205 * because TXfull_l will be set immediately and cached in dscr. */
2206 retval
= cortex_a_wait_dscr_bits(target
, DSCR_DTRTX_FULL_LATCHED
,
2207 DSCR_DTRTX_FULL_LATCHED
, dscr
);
2208 if (retval
!= ERROR_OK
)
2211 /* Read the value transferred to DTRTX into the buffer. */
2212 retval
= mem_ap_read_atomic_u32(armv7a
->debug_ap
,
2213 armv7a
->debug_base
+ CPUDBG_DTRTX
, &data
);
2214 if (retval
!= ERROR_OK
)
2217 *buffer
= (uint8_t) data
;
2219 target_buffer_set_u16(target
, buffer
, (uint16_t) data
);
2221 target_buffer_set_u32(target
, buffer
, data
);
2231 static int cortex_a_read_cpu_memory_fast(struct target
*target
,
2232 uint32_t count
, uint8_t *buffer
, uint32_t *dscr
)
2234 /* Reads count objects of size 4 into *buffer. Old value of DSCR must be in
2235 * *dscr; updated to new value. This is fast but only works for word-sized
2236 * objects at aligned addresses.
2238 * - Address is in R0 and must be a multiple of 4.
2239 * - R0 is marked dirty.
2241 struct armv7a_common
*armv7a
= target_to_armv7a(target
);
2245 /* Switch to non-blocking mode if not already in that mode. */
2246 retval
= cortex_a_set_dcc_mode(target
, DSCR_EXT_DCC_NON_BLOCKING
, dscr
);
2247 if (retval
!= ERROR_OK
)
2250 /* Issue the LDC instruction via a write to ITR. */
2251 retval
= cortex_a_exec_opcode(target
, ARMV4_5_LDC(0, 1, 0, 1, 14, 5, 0, 4), dscr
);
2252 if (retval
!= ERROR_OK
)
2258 /* Switch to fast mode if not already in that mode. */
2259 retval
= cortex_a_set_dcc_mode(target
, DSCR_EXT_DCC_FAST_MODE
, dscr
);
2260 if (retval
!= ERROR_OK
)
2263 /* Latch LDC instruction. */
2264 retval
= mem_ap_write_atomic_u32(armv7a
->debug_ap
,
2265 armv7a
->debug_base
+ CPUDBG_ITR
, ARMV4_5_LDC(0, 1, 0, 1, 14, 5, 0, 4));
2266 if (retval
!= ERROR_OK
)
2269 /* Read the value transferred to DTRTX into the buffer. Due to fast
2270 * mode rules, this blocks until the instruction finishes executing and
2271 * then reissues the read instruction to read the next word from
2272 * memory. The last read of DTRTX in this call reads the second-to-last
2273 * word from memory and issues the read instruction for the last word.
2275 retval
= mem_ap_read_buf_noincr(armv7a
->debug_ap
, buffer
,
2276 4, count
, armv7a
->debug_base
+ CPUDBG_DTRTX
);
2277 if (retval
!= ERROR_OK
)
2281 buffer
+= count
* 4;
2284 /* Wait for last issued instruction to complete. */
2285 retval
= cortex_a_wait_instrcmpl(target
, dscr
, false);
2286 if (retval
!= ERROR_OK
)
2289 /* Switch to non-blocking mode if not already in that mode. */
2290 retval
= cortex_a_set_dcc_mode(target
, DSCR_EXT_DCC_NON_BLOCKING
, dscr
);
2291 if (retval
!= ERROR_OK
)
2294 /* Check for faults and return early. */
2295 if (*dscr
& (DSCR_STICKY_ABORT_PRECISE
| DSCR_STICKY_ABORT_IMPRECISE
))
2296 return ERROR_OK
; /* A data fault is not considered a system failure. */
2298 /* Wait until DTRTX is full (according to ARMv7-A/-R architecture manual
2299 * section C8.4.3, checking InstrCmpl_l is not sufficient; one must also
2300 * check TXfull_l). Most of the time this will be free because TXfull_l
2301 * will be set immediately and cached in dscr. */
2302 retval
= cortex_a_wait_dscr_bits(target
, DSCR_DTRTX_FULL_LATCHED
,
2303 DSCR_DTRTX_FULL_LATCHED
, dscr
);
2304 if (retval
!= ERROR_OK
)
2307 /* Read the value transferred to DTRTX into the buffer. This is the last
2309 retval
= mem_ap_read_atomic_u32(armv7a
->debug_ap
,
2310 armv7a
->debug_base
+ CPUDBG_DTRTX
, &u32
);
2311 if (retval
!= ERROR_OK
)
2313 target_buffer_set_u32(target
, buffer
, u32
);
2318 static int cortex_a_read_cpu_memory(struct target
*target
,
2319 uint32_t address
, uint32_t size
,
2320 uint32_t count
, uint8_t *buffer
)
2322 /* Read memory through the CPU. */
2323 int retval
, final_retval
;
2324 struct armv7a_common
*armv7a
= target_to_armv7a(target
);
2325 struct arm
*arm
= &armv7a
->arm
;
2326 uint32_t dscr
, orig_dfar
, orig_dfsr
, fault_dscr
, fault_dfar
, fault_dfsr
;
2328 LOG_DEBUG("Reading CPU memory address 0x%" PRIx32
" size %" PRIu32
" count %" PRIu32
,
2329 address
, size
, count
);
2330 if (target
->state
!= TARGET_HALTED
) {
2331 LOG_WARNING("target not halted");
2332 return ERROR_TARGET_NOT_HALTED
;
2338 /* Clear any abort. */
2339 retval
= mem_ap_write_atomic_u32(armv7a
->debug_ap
,
2340 armv7a
->debug_base
+ CPUDBG_DRCR
, DRCR_CLEAR_EXCEPTIONS
);
2341 if (retval
!= ERROR_OK
)
2345 retval
= mem_ap_read_atomic_u32(armv7a
->debug_ap
,
2346 armv7a
->debug_base
+ CPUDBG_DSCR
, &dscr
);
2347 if (retval
!= ERROR_OK
)
2350 /* Switch to non-blocking mode if not already in that mode. */
2351 retval
= cortex_a_set_dcc_mode(target
, DSCR_EXT_DCC_NON_BLOCKING
, &dscr
);
2352 if (retval
!= ERROR_OK
)
2355 /* Mark R0 as dirty. */
2356 arm_reg_current(arm
, 0)->dirty
= true;
2358 /* Read DFAR and DFSR, as they will be modified in the event of a fault. */
2359 retval
= cortex_a_read_dfar_dfsr(target
, &orig_dfar
, &orig_dfsr
, &dscr
);
2360 if (retval
!= ERROR_OK
)
2363 /* Get the memory address into R0. */
2364 retval
= mem_ap_write_atomic_u32(armv7a
->debug_ap
,
2365 armv7a
->debug_base
+ CPUDBG_DTRRX
, address
);
2366 if (retval
!= ERROR_OK
)
2368 retval
= cortex_a_exec_opcode(target
, ARMV4_5_MRC(14, 0, 0, 0, 5, 0), &dscr
);
2369 if (retval
!= ERROR_OK
)
2372 if (size
== 4 && (address
% 4) == 0) {
2373 /* We are doing a word-aligned transfer, so use fast mode. */
2374 retval
= cortex_a_read_cpu_memory_fast(target
, count
, buffer
, &dscr
);
2376 /* Use slow path. */
2377 retval
= cortex_a_read_cpu_memory_slow(target
, size
, count
, buffer
, &dscr
);
2381 final_retval
= retval
;
2383 /* Switch to non-blocking mode if not already in that mode. */
2384 retval
= cortex_a_set_dcc_mode(target
, DSCR_EXT_DCC_NON_BLOCKING
, &dscr
);
2385 if (final_retval
== ERROR_OK
)
2386 final_retval
= retval
;
2388 /* Wait for last issued instruction to complete. */
2389 retval
= cortex_a_wait_instrcmpl(target
, &dscr
, true);
2390 if (final_retval
== ERROR_OK
)
2391 final_retval
= retval
;
2393 /* If there were any sticky abort flags, clear them. */
2394 if (dscr
& (DSCR_STICKY_ABORT_PRECISE
| DSCR_STICKY_ABORT_IMPRECISE
)) {
2396 mem_ap_write_atomic_u32(armv7a
->debug_ap
,
2397 armv7a
->debug_base
+ CPUDBG_DRCR
, DRCR_CLEAR_EXCEPTIONS
);
2398 dscr
&= ~(DSCR_STICKY_ABORT_PRECISE
| DSCR_STICKY_ABORT_IMPRECISE
);
2403 /* Handle synchronous data faults. */
2404 if (fault_dscr
& DSCR_STICKY_ABORT_PRECISE
) {
2405 if (final_retval
== ERROR_OK
) {
2406 /* Final return value will reflect cause of fault. */
2407 retval
= cortex_a_read_dfar_dfsr(target
, &fault_dfar
, &fault_dfsr
, &dscr
);
2408 if (retval
== ERROR_OK
) {
2409 LOG_ERROR("data abort at 0x%08" PRIx32
", dfsr = 0x%08" PRIx32
, fault_dfar
, fault_dfsr
);
2410 final_retval
= cortex_a_dfsr_to_error_code(fault_dfsr
);
2412 final_retval
= retval
;
2414 /* Fault destroyed DFAR/DFSR; restore them. */
2415 retval
= cortex_a_write_dfar_dfsr(target
, orig_dfar
, orig_dfsr
, &dscr
);
2416 if (retval
!= ERROR_OK
)
2417 LOG_ERROR("error restoring dfar/dfsr - dscr = 0x%08" PRIx32
, dscr
);
2420 /* Handle asynchronous data faults. */
2421 if (fault_dscr
& DSCR_STICKY_ABORT_IMPRECISE
) {
2422 if (final_retval
== ERROR_OK
)
2423 /* No other error has been recorded so far, so keep this one. */
2424 final_retval
= ERROR_TARGET_DATA_ABORT
;
2427 /* If the DCC is nonempty, clear it. */
2428 if (dscr
& DSCR_DTRTX_FULL_LATCHED
) {
2430 retval
= mem_ap_read_atomic_u32(armv7a
->debug_ap
,
2431 armv7a
->debug_base
+ CPUDBG_DTRTX
, &dummy
);
2432 if (final_retval
== ERROR_OK
)
2433 final_retval
= retval
;
2435 if (dscr
& DSCR_DTRRX_FULL_LATCHED
) {
2436 retval
= cortex_a_exec_opcode(target
, ARMV4_5_MRC(14, 0, 1, 0, 5, 0), &dscr
);
2437 if (final_retval
== ERROR_OK
)
2438 final_retval
= retval
;
2442 return final_retval
;
2447 * Cortex-A Memory access
2449 * This is same Cortex-M3 but we must also use the correct
2450 * ap number for every access.
2453 static int cortex_a_read_phys_memory(struct target
*target
,
2454 target_addr_t address
, uint32_t size
,
2455 uint32_t count
, uint8_t *buffer
)
2459 if (!count
|| !buffer
)
2460 return ERROR_COMMAND_SYNTAX_ERROR
;
2462 LOG_DEBUG("Reading memory at real address " TARGET_ADDR_FMT
"; size %" PRId32
"; count %" PRId32
,
2463 address
, size
, count
);
2465 /* read memory through the CPU */
2466 cortex_a_prep_memaccess(target
, 1);
2467 retval
= cortex_a_read_cpu_memory(target
, address
, size
, count
, buffer
);
2468 cortex_a_post_memaccess(target
, 1);
2473 static int cortex_a_read_memory(struct target
*target
, target_addr_t address
,
2474 uint32_t size
, uint32_t count
, uint8_t *buffer
)
2478 /* cortex_a handles unaligned memory access */
2479 LOG_DEBUG("Reading memory at address " TARGET_ADDR_FMT
"; size %" PRId32
"; count %" PRId32
,
2480 address
, size
, count
);
2482 cortex_a_prep_memaccess(target
, 0);
2483 retval
= cortex_a_read_cpu_memory(target
, address
, size
, count
, buffer
);
2484 cortex_a_post_memaccess(target
, 0);
2489 static int cortex_a_write_phys_memory(struct target
*target
,
2490 target_addr_t address
, uint32_t size
,
2491 uint32_t count
, const uint8_t *buffer
)
2495 if (!count
|| !buffer
)
2496 return ERROR_COMMAND_SYNTAX_ERROR
;
2498 LOG_DEBUG("Writing memory to real address " TARGET_ADDR_FMT
"; size %" PRId32
"; count %" PRId32
,
2499 address
, size
, count
);
2501 /* write memory through the CPU */
2502 cortex_a_prep_memaccess(target
, 1);
2503 retval
= cortex_a_write_cpu_memory(target
, address
, size
, count
, buffer
);
2504 cortex_a_post_memaccess(target
, 1);
2509 static int cortex_a_write_memory(struct target
*target
, target_addr_t address
,
2510 uint32_t size
, uint32_t count
, const uint8_t *buffer
)
2514 /* cortex_a handles unaligned memory access */
2515 LOG_DEBUG("Writing memory at address " TARGET_ADDR_FMT
"; size %" PRId32
"; count %" PRId32
,
2516 address
, size
, count
);
2518 /* memory writes bypass the caches, must flush before writing */
2519 armv7a_cache_auto_flush_on_write(target
, address
, size
* count
);
2521 cortex_a_prep_memaccess(target
, 0);
2522 retval
= cortex_a_write_cpu_memory(target
, address
, size
, count
, buffer
);
2523 cortex_a_post_memaccess(target
, 0);
2527 static int cortex_a_read_buffer(struct target
*target
, target_addr_t address
,
2528 uint32_t count
, uint8_t *buffer
)
2532 /* Align up to maximum 4 bytes. The loop condition makes sure the next pass
2533 * will have something to do with the size we leave to it. */
2534 for (size
= 1; size
< 4 && count
>= size
* 2 + (address
& size
); size
*= 2) {
2535 if (address
& size
) {
2536 int retval
= target_read_memory(target
, address
, size
, 1, buffer
);
2537 if (retval
!= ERROR_OK
)
2545 /* Read the data with as large access size as possible. */
2546 for (; size
> 0; size
/= 2) {
2547 uint32_t aligned
= count
- count
% size
;
2549 int retval
= target_read_memory(target
, address
, size
, aligned
/ size
, buffer
);
2550 if (retval
!= ERROR_OK
)
2561 static int cortex_a_write_buffer(struct target
*target
, target_addr_t address
,
2562 uint32_t count
, const uint8_t *buffer
)
2566 /* Align up to maximum 4 bytes. The loop condition makes sure the next pass
2567 * will have something to do with the size we leave to it. */
2568 for (size
= 1; size
< 4 && count
>= size
* 2 + (address
& size
); size
*= 2) {
2569 if (address
& size
) {
2570 int retval
= target_write_memory(target
, address
, size
, 1, buffer
);
2571 if (retval
!= ERROR_OK
)
2579 /* Write the data with as large access size as possible. */
2580 for (; size
> 0; size
/= 2) {
2581 uint32_t aligned
= count
- count
% size
;
2583 int retval
= target_write_memory(target
, address
, size
, aligned
/ size
, buffer
);
2584 if (retval
!= ERROR_OK
)
2595 static int cortex_a_handle_target_request(void *priv
)
2597 struct target
*target
= priv
;
2598 struct armv7a_common
*armv7a
= target_to_armv7a(target
);
2601 if (!target_was_examined(target
))
2603 if (!target
->dbg_msg_enabled
)
2606 if (target
->state
== TARGET_RUNNING
) {
2609 retval
= mem_ap_read_atomic_u32(armv7a
->debug_ap
,
2610 armv7a
->debug_base
+ CPUDBG_DSCR
, &dscr
);
2612 /* check if we have data */
2613 int64_t then
= timeval_ms();
2614 while ((dscr
& DSCR_DTR_TX_FULL
) && (retval
== ERROR_OK
)) {
2615 retval
= mem_ap_read_atomic_u32(armv7a
->debug_ap
,
2616 armv7a
->debug_base
+ CPUDBG_DTRTX
, &request
);
2617 if (retval
== ERROR_OK
) {
2618 target_request(target
, request
);
2619 retval
= mem_ap_read_atomic_u32(armv7a
->debug_ap
,
2620 armv7a
->debug_base
+ CPUDBG_DSCR
, &dscr
);
2622 if (timeval_ms() > then
+ 1000) {
2623 LOG_ERROR("Timeout waiting for dtr tx full");
2633 * Cortex-A target information and configuration
2636 static int cortex_a_examine_first(struct target
*target
)
2638 struct cortex_a_common
*cortex_a
= target_to_cortex_a(target
);
2639 struct armv7a_common
*armv7a
= &cortex_a
->armv7a_common
;
2640 struct adiv5_dap
*swjdp
= armv7a
->arm
.dap
;
2643 int retval
= ERROR_OK
;
2644 uint32_t didr
, cpuid
, dbg_osreg
;
2646 /* Search for the APB-AP - it is needed for access to debug registers */
2647 retval
= dap_find_ap(swjdp
, AP_TYPE_APB_AP
, &armv7a
->debug_ap
);
2648 if (retval
!= ERROR_OK
) {
2649 LOG_ERROR("Could not find APB-AP for debug access");
2653 retval
= mem_ap_init(armv7a
->debug_ap
);
2654 if (retval
!= ERROR_OK
) {
2655 LOG_ERROR("Could not initialize the APB-AP");
2659 armv7a
->debug_ap
->memaccess_tck
= 80;
2661 if (!target
->dbgbase_set
) {
2663 /* Get ROM Table base */
2665 int32_t coreidx
= target
->coreid
;
2666 LOG_DEBUG("%s's dbgbase is not set, trying to detect using the ROM table",
2668 retval
= dap_get_debugbase(armv7a
->debug_ap
, &dbgbase
, &apid
);
2669 if (retval
!= ERROR_OK
)
2671 /* Lookup 0x15 -- Processor DAP */
2672 retval
= dap_lookup_cs_component(armv7a
->debug_ap
, dbgbase
, 0x15,
2673 &armv7a
->debug_base
, &coreidx
);
2674 if (retval
!= ERROR_OK
) {
2675 LOG_ERROR("Can't detect %s's dbgbase from the ROM table; you need to specify it explicitly.",
2679 LOG_DEBUG("Detected core %" PRId32
" dbgbase: %08" PRIx32
,
2680 target
->coreid
, armv7a
->debug_base
);
2682 armv7a
->debug_base
= target
->dbgbase
;
2684 retval
= mem_ap_read_atomic_u32(armv7a
->debug_ap
,
2685 armv7a
->debug_base
+ CPUDBG_DIDR
, &didr
);
2686 if (retval
!= ERROR_OK
) {
2687 LOG_DEBUG("Examine %s failed", "DIDR");
2691 retval
= mem_ap_read_atomic_u32(armv7a
->debug_ap
,
2692 armv7a
->debug_base
+ CPUDBG_CPUID
, &cpuid
);
2693 if (retval
!= ERROR_OK
) {
2694 LOG_DEBUG("Examine %s failed", "CPUID");
2698 LOG_DEBUG("didr = 0x%08" PRIx32
, didr
);
2699 LOG_DEBUG("cpuid = 0x%08" PRIx32
, cpuid
);
2701 cortex_a
->didr
= didr
;
2702 cortex_a
->cpuid
= cpuid
;
2704 retval
= mem_ap_read_atomic_u32(armv7a
->debug_ap
,
2705 armv7a
->debug_base
+ CPUDBG_PRSR
, &dbg_osreg
);
2706 if (retval
!= ERROR_OK
)
2708 LOG_DEBUG("target->coreid %" PRId32
" DBGPRSR 0x%" PRIx32
, target
->coreid
, dbg_osreg
);
2710 if ((dbg_osreg
& PRSR_POWERUP_STATUS
) == 0) {
2711 LOG_ERROR("target->coreid %" PRId32
" powered down!", target
->coreid
);
2712 target
->state
= TARGET_UNKNOWN
; /* TARGET_NO_POWER? */
2713 return ERROR_TARGET_INIT_FAILED
;
2716 if (dbg_osreg
& PRSR_STICKY_RESET_STATUS
)
2717 LOG_DEBUG("target->coreid %" PRId32
" was reset!", target
->coreid
);
2719 /* Read DBGOSLSR and check if OSLK is implemented */
2720 retval
= mem_ap_read_atomic_u32(armv7a
->debug_ap
,
2721 armv7a
->debug_base
+ CPUDBG_OSLSR
, &dbg_osreg
);
2722 if (retval
!= ERROR_OK
)
2724 LOG_DEBUG("target->coreid %" PRId32
" DBGOSLSR 0x%" PRIx32
, target
->coreid
, dbg_osreg
);
2726 /* check if OS Lock is implemented */
2727 if ((dbg_osreg
& OSLSR_OSLM
) == OSLSR_OSLM0
|| (dbg_osreg
& OSLSR_OSLM
) == OSLSR_OSLM1
) {
2728 /* check if OS Lock is set */
2729 if (dbg_osreg
& OSLSR_OSLK
) {
2730 LOG_DEBUG("target->coreid %" PRId32
" OSLock set! Trying to unlock", target
->coreid
);
2732 retval
= mem_ap_write_atomic_u32(armv7a
->debug_ap
,
2733 armv7a
->debug_base
+ CPUDBG_OSLAR
,
2735 if (retval
== ERROR_OK
)
2736 retval
= mem_ap_read_atomic_u32(armv7a
->debug_ap
,
2737 armv7a
->debug_base
+ CPUDBG_OSLSR
, &dbg_osreg
);
2739 /* if we fail to access the register or cannot reset the OSLK bit, bail out */
2740 if (retval
!= ERROR_OK
|| (dbg_osreg
& OSLSR_OSLK
) != 0) {
2741 LOG_ERROR("target->coreid %" PRId32
" OSLock sticky, core not powered?",
2743 target
->state
= TARGET_UNKNOWN
; /* TARGET_NO_POWER? */
2744 return ERROR_TARGET_INIT_FAILED
;
2749 armv7a
->arm
.core_type
= ARM_MODE_MON
;
2751 /* Avoid recreating the registers cache */
2752 if (!target_was_examined(target
)) {
2753 retval
= cortex_a_dpm_setup(cortex_a
, didr
);
2754 if (retval
!= ERROR_OK
)
2758 /* Setup Breakpoint Register Pairs */
2759 cortex_a
->brp_num
= ((didr
>> 24) & 0x0F) + 1;
2760 cortex_a
->brp_num_context
= ((didr
>> 20) & 0x0F) + 1;
2761 cortex_a
->brp_num_available
= cortex_a
->brp_num
;
2762 free(cortex_a
->brp_list
);
2763 cortex_a
->brp_list
= calloc(cortex_a
->brp_num
, sizeof(struct cortex_a_brp
));
2764 /* cortex_a->brb_enabled = ????; */
2765 for (i
= 0; i
< cortex_a
->brp_num
; i
++) {
2766 cortex_a
->brp_list
[i
].used
= 0;
2767 if (i
< (cortex_a
->brp_num
-cortex_a
->brp_num_context
))
2768 cortex_a
->brp_list
[i
].type
= BRP_NORMAL
;
2770 cortex_a
->brp_list
[i
].type
= BRP_CONTEXT
;
2771 cortex_a
->brp_list
[i
].value
= 0;
2772 cortex_a
->brp_list
[i
].control
= 0;
2773 cortex_a
->brp_list
[i
].BRPn
= i
;
2776 LOG_DEBUG("Configured %i hw breakpoints", cortex_a
->brp_num
);
2778 /* select debug_ap as default */
2779 swjdp
->apsel
= armv7a
->debug_ap
->ap_num
;
2781 target_set_examined(target
);
2785 static int cortex_a_examine(struct target
*target
)
2787 int retval
= ERROR_OK
;
2789 /* Reestablish communication after target reset */
2790 retval
= cortex_a_examine_first(target
);
2792 /* Configure core debug access */
2793 if (retval
== ERROR_OK
)
2794 retval
= cortex_a_init_debug_access(target
);
2800 * Cortex-A target creation and initialization
2803 static int cortex_a_init_target(struct command_context
*cmd_ctx
,
2804 struct target
*target
)
2806 /* examine_first() does a bunch of this */
2807 arm_semihosting_init(target
);
2811 static int cortex_a_init_arch_info(struct target
*target
,
2812 struct cortex_a_common
*cortex_a
, struct adiv5_dap
*dap
)
2814 struct armv7a_common
*armv7a
= &cortex_a
->armv7a_common
;
2816 /* Setup struct cortex_a_common */
2817 cortex_a
->common_magic
= CORTEX_A_COMMON_MAGIC
;
2818 armv7a
->arm
.dap
= dap
;
2820 /* register arch-specific functions */
2821 armv7a
->examine_debug_reason
= NULL
;
2823 armv7a
->post_debug_entry
= cortex_a_post_debug_entry
;
2825 armv7a
->pre_restore_context
= NULL
;
2827 armv7a
->armv7a_mmu
.read_physical_memory
= cortex_a_read_phys_memory
;
2830 /* arm7_9->handle_target_request = cortex_a_handle_target_request; */
2832 /* REVISIT v7a setup should be in a v7a-specific routine */
2833 armv7a_init_arch_info(target
, armv7a
);
2834 target_register_timer_callback(cortex_a_handle_target_request
, 1,
2835 TARGET_TIMER_TYPE_PERIODIC
, target
);
2840 static int cortex_a_target_create(struct target
*target
, Jim_Interp
*interp
)
2842 struct cortex_a_common
*cortex_a
;
2843 struct adiv5_private_config
*pc
;
2845 if (target
->private_config
== NULL
)
2848 pc
= (struct adiv5_private_config
*)target
->private_config
;
2850 cortex_a
= calloc(1, sizeof(struct cortex_a_common
));
2851 if (cortex_a
== NULL
) {
2852 LOG_ERROR("Out of memory");
2855 cortex_a
->common_magic
= CORTEX_A_COMMON_MAGIC
;
2856 cortex_a
->armv7a_common
.is_armv7r
= false;
2857 cortex_a
->armv7a_common
.arm
.arm_vfp_version
= ARM_VFP_V3
;
2859 return cortex_a_init_arch_info(target
, cortex_a
, pc
->dap
);
2862 static int cortex_r4_target_create(struct target
*target
, Jim_Interp
*interp
)
2864 struct cortex_a_common
*cortex_a
;
2865 struct adiv5_private_config
*pc
;
2867 pc
= (struct adiv5_private_config
*)target
->private_config
;
2868 if (adiv5_verify_config(pc
) != ERROR_OK
)
2871 cortex_a
= calloc(1, sizeof(struct cortex_a_common
));
2872 if (cortex_a
== NULL
) {
2873 LOG_ERROR("Out of memory");
2876 cortex_a
->common_magic
= CORTEX_A_COMMON_MAGIC
;
2877 cortex_a
->armv7a_common
.is_armv7r
= true;
2879 return cortex_a_init_arch_info(target
, cortex_a
, pc
->dap
);
2882 static void cortex_a_deinit_target(struct target
*target
)
2884 struct cortex_a_common
*cortex_a
= target_to_cortex_a(target
);
2885 struct armv7a_common
*armv7a
= &cortex_a
->armv7a_common
;
2886 struct arm_dpm
*dpm
= &armv7a
->dpm
;
2890 if (target_was_examined(target
)) {
2891 /* Disable halt for breakpoint, watchpoint and vector catch */
2892 retval
= mem_ap_read_atomic_u32(armv7a
->debug_ap
,
2893 armv7a
->debug_base
+ CPUDBG_DSCR
, &dscr
);
2894 if (retval
== ERROR_OK
)
2895 mem_ap_write_atomic_u32(armv7a
->debug_ap
,
2896 armv7a
->debug_base
+ CPUDBG_DSCR
,
2897 dscr
& ~DSCR_HALT_DBG_MODE
);
2900 free(cortex_a
->brp_list
);
2903 free(target
->private_config
);
2907 static int cortex_a_mmu(struct target
*target
, int *enabled
)
2909 struct armv7a_common
*armv7a
= target_to_armv7a(target
);
2911 if (target
->state
!= TARGET_HALTED
) {
2912 LOG_ERROR("%s: target not halted", __func__
);
2913 return ERROR_TARGET_INVALID
;
2916 if (armv7a
->is_armv7r
)
2919 *enabled
= target_to_cortex_a(target
)->armv7a_common
.armv7a_mmu
.mmu_enabled
;
2924 static int cortex_a_virt2phys(struct target
*target
,
2925 target_addr_t virt
, target_addr_t
*phys
)
2928 int mmu_enabled
= 0;
2931 * If the MMU was not enabled at debug entry, there is no
2932 * way of knowing if there was ever a valid configuration
2933 * for it and thus it's not safe to enable it. In this case,
2934 * just return the virtual address as physical.
2936 cortex_a_mmu(target
, &mmu_enabled
);
2942 /* mmu must be enable in order to get a correct translation */
2943 retval
= cortex_a_mmu_modify(target
, 1);
2944 if (retval
!= ERROR_OK
)
2946 return armv7a_mmu_translate_va_pa(target
, (uint32_t)virt
,
2947 (uint32_t *)phys
, 1);
2950 COMMAND_HANDLER(cortex_a_handle_cache_info_command
)
2952 struct target
*target
= get_current_target(CMD_CTX
);
2953 struct armv7a_common
*armv7a
= target_to_armv7a(target
);
2955 return armv7a_handle_cache_info_command(CMD_CTX
,
2956 &armv7a
->armv7a_mmu
.armv7a_cache
);
2960 COMMAND_HANDLER(cortex_a_handle_dbginit_command
)
2962 struct target
*target
= get_current_target(CMD_CTX
);
2963 if (!target_was_examined(target
)) {
2964 LOG_ERROR("target not examined yet");
2968 return cortex_a_init_debug_access(target
);
2971 COMMAND_HANDLER(cortex_a_handle_smp_gdb_command
)
2973 struct target
*target
= get_current_target(CMD_CTX
);
2974 int retval
= ERROR_OK
;
2975 struct target_list
*head
;
2976 head
= target
->head
;
2977 if (head
!= (struct target_list
*)NULL
) {
2978 if (CMD_ARGC
== 1) {
2980 COMMAND_PARSE_NUMBER(int, CMD_ARGV
[0], coreid
);
2981 if (ERROR_OK
!= retval
)
2983 target
->gdb_service
->core
[1] = coreid
;
2986 command_print(CMD_CTX
, "gdb coreid %" PRId32
" -> %" PRId32
, target
->gdb_service
->core
[0]
2987 , target
->gdb_service
->core
[1]);
2992 COMMAND_HANDLER(handle_cortex_a_mask_interrupts_command
)
2994 struct target
*target
= get_current_target(CMD_CTX
);
2995 struct cortex_a_common
*cortex_a
= target_to_cortex_a(target
);
2997 static const Jim_Nvp nvp_maskisr_modes
[] = {
2998 { .name
= "off", .value
= CORTEX_A_ISRMASK_OFF
},
2999 { .name
= "on", .value
= CORTEX_A_ISRMASK_ON
},
3000 { .name
= NULL
, .value
= -1 },
3005 n
= Jim_Nvp_name2value_simple(nvp_maskisr_modes
, CMD_ARGV
[0]);
3006 if (n
->name
== NULL
) {
3007 LOG_ERROR("Unknown parameter: %s - should be off or on", CMD_ARGV
[0]);
3008 return ERROR_COMMAND_SYNTAX_ERROR
;
3011 cortex_a
->isrmasking_mode
= n
->value
;
3014 n
= Jim_Nvp_value2name_simple(nvp_maskisr_modes
, cortex_a
->isrmasking_mode
);
3015 command_print(CMD_CTX
, "cortex_a interrupt mask %s", n
->name
);
3020 COMMAND_HANDLER(handle_cortex_a_dacrfixup_command
)
3022 struct target
*target
= get_current_target(CMD_CTX
);
3023 struct cortex_a_common
*cortex_a
= target_to_cortex_a(target
);
3025 static const Jim_Nvp nvp_dacrfixup_modes
[] = {
3026 { .name
= "off", .value
= CORTEX_A_DACRFIXUP_OFF
},
3027 { .name
= "on", .value
= CORTEX_A_DACRFIXUP_ON
},
3028 { .name
= NULL
, .value
= -1 },
3033 n
= Jim_Nvp_name2value_simple(nvp_dacrfixup_modes
, CMD_ARGV
[0]);
3034 if (n
->name
== NULL
)
3035 return ERROR_COMMAND_SYNTAX_ERROR
;
3036 cortex_a
->dacrfixup_mode
= n
->value
;
3040 n
= Jim_Nvp_value2name_simple(nvp_dacrfixup_modes
, cortex_a
->dacrfixup_mode
);
3041 command_print(CMD_CTX
, "cortex_a domain access control fixup %s", n
->name
);
3046 static const struct command_registration cortex_a_exec_command_handlers
[] = {
3048 .name
= "cache_info",
3049 .handler
= cortex_a_handle_cache_info_command
,
3050 .mode
= COMMAND_EXEC
,
3051 .help
= "display information about target caches",
3056 .handler
= cortex_a_handle_dbginit_command
,
3057 .mode
= COMMAND_EXEC
,
3058 .help
= "Initialize core debug",
3063 .handler
= cortex_a_handle_smp_gdb_command
,
3064 .mode
= COMMAND_EXEC
,
3065 .help
= "display/fix current core played to gdb",
3070 .handler
= handle_cortex_a_mask_interrupts_command
,
3071 .mode
= COMMAND_ANY
,
3072 .help
= "mask cortex_a interrupts",
3073 .usage
= "['on'|'off']",
3076 .name
= "dacrfixup",
3077 .handler
= handle_cortex_a_dacrfixup_command
,
3078 .mode
= COMMAND_ANY
,
3079 .help
= "set domain access control (DACR) to all-manager "
3081 .usage
= "['on'|'off']",
3084 .chain
= armv7a_mmu_command_handlers
,
3087 .chain
= smp_command_handlers
,
3090 COMMAND_REGISTRATION_DONE
3092 static const struct command_registration cortex_a_command_handlers
[] = {
3094 .chain
= arm_command_handlers
,
3097 .chain
= armv7a_command_handlers
,
3101 .mode
= COMMAND_ANY
,
3102 .help
= "Cortex-A command group",
3104 .chain
= cortex_a_exec_command_handlers
,
3106 COMMAND_REGISTRATION_DONE
3109 struct target_type cortexa_target
= {
3111 .deprecated_name
= "cortex_a8",
3113 .poll
= cortex_a_poll
,
3114 .arch_state
= armv7a_arch_state
,
3116 .halt
= cortex_a_halt
,
3117 .resume
= cortex_a_resume
,
3118 .step
= cortex_a_step
,
3120 .assert_reset
= cortex_a_assert_reset
,
3121 .deassert_reset
= cortex_a_deassert_reset
,
3123 /* REVISIT allow exporting VFP3 registers ... */
3124 .get_gdb_arch
= arm_get_gdb_arch
,
3125 .get_gdb_reg_list
= arm_get_gdb_reg_list
,
3127 .read_memory
= cortex_a_read_memory
,
3128 .write_memory
= cortex_a_write_memory
,
3130 .read_buffer
= cortex_a_read_buffer
,
3131 .write_buffer
= cortex_a_write_buffer
,
3133 .checksum_memory
= arm_checksum_memory
,
3134 .blank_check_memory
= arm_blank_check_memory
,
3136 .run_algorithm
= armv4_5_run_algorithm
,
3138 .add_breakpoint
= cortex_a_add_breakpoint
,
3139 .add_context_breakpoint
= cortex_a_add_context_breakpoint
,
3140 .add_hybrid_breakpoint
= cortex_a_add_hybrid_breakpoint
,
3141 .remove_breakpoint
= cortex_a_remove_breakpoint
,
3142 .add_watchpoint
= NULL
,
3143 .remove_watchpoint
= NULL
,
3145 .commands
= cortex_a_command_handlers
,
3146 .target_create
= cortex_a_target_create
,
3147 .target_jim_configure
= adiv5_jim_configure
,
3148 .init_target
= cortex_a_init_target
,
3149 .examine
= cortex_a_examine
,
3150 .deinit_target
= cortex_a_deinit_target
,
3152 .read_phys_memory
= cortex_a_read_phys_memory
,
3153 .write_phys_memory
= cortex_a_write_phys_memory
,
3154 .mmu
= cortex_a_mmu
,
3155 .virt2phys
= cortex_a_virt2phys
,
3158 static const struct command_registration cortex_r4_exec_command_handlers
[] = {
3161 .handler
= cortex_a_handle_dbginit_command
,
3162 .mode
= COMMAND_EXEC
,
3163 .help
= "Initialize core debug",
3168 .handler
= handle_cortex_a_mask_interrupts_command
,
3169 .mode
= COMMAND_EXEC
,
3170 .help
= "mask cortex_r4 interrupts",
3171 .usage
= "['on'|'off']",
3174 COMMAND_REGISTRATION_DONE
3176 static const struct command_registration cortex_r4_command_handlers
[] = {
3178 .chain
= arm_command_handlers
,
3181 .name
= "cortex_r4",
3182 .mode
= COMMAND_ANY
,
3183 .help
= "Cortex-R4 command group",
3185 .chain
= cortex_r4_exec_command_handlers
,
3187 COMMAND_REGISTRATION_DONE
3190 struct target_type cortexr4_target
= {
3191 .name
= "cortex_r4",
3193 .poll
= cortex_a_poll
,
3194 .arch_state
= armv7a_arch_state
,
3196 .halt
= cortex_a_halt
,
3197 .resume
= cortex_a_resume
,
3198 .step
= cortex_a_step
,
3200 .assert_reset
= cortex_a_assert_reset
,
3201 .deassert_reset
= cortex_a_deassert_reset
,
3203 /* REVISIT allow exporting VFP3 registers ... */
3204 .get_gdb_arch
= arm_get_gdb_arch
,
3205 .get_gdb_reg_list
= arm_get_gdb_reg_list
,
3207 .read_memory
= cortex_a_read_phys_memory
,
3208 .write_memory
= cortex_a_write_phys_memory
,
3210 .checksum_memory
= arm_checksum_memory
,
3211 .blank_check_memory
= arm_blank_check_memory
,
3213 .run_algorithm
= armv4_5_run_algorithm
,
3215 .add_breakpoint
= cortex_a_add_breakpoint
,
3216 .add_context_breakpoint
= cortex_a_add_context_breakpoint
,
3217 .add_hybrid_breakpoint
= cortex_a_add_hybrid_breakpoint
,
3218 .remove_breakpoint
= cortex_a_remove_breakpoint
,
3219 .add_watchpoint
= NULL
,
3220 .remove_watchpoint
= NULL
,
3222 .commands
= cortex_r4_command_handlers
,
3223 .target_create
= cortex_r4_target_create
,
3224 .target_jim_configure
= adiv5_jim_configure
,
3225 .init_target
= cortex_a_init_target
,
3226 .examine
= cortex_a_examine
,
3227 .deinit_target
= cortex_a_deinit_target
,