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 * This program is free software; you can redistribute it and/or modify *
15 * it under the terms of the GNU General Public License as published by *
16 * the Free Software Foundation; either version 2 of the License, or *
17 * (at your option) any later version. *
19 * This program is distributed in the hope that it will be useful, *
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
22 * GNU General Public License for more details. *
24 * You should have received a copy of the GNU General Public License *
25 * along with this program; if not, write to the *
26 * Free Software Foundation, Inc., *
27 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
29 * Cortex-A8(tm) TRM, ARM DDI 0344H *
31 ***************************************************************************/
36 #include "breakpoints.h"
37 #include "cortex_a8.h"
39 #include "target_request.h"
40 #include "target_type.h"
42 static int cortex_a8_poll(struct target
*target
);
43 static int cortex_a8_debug_entry(struct target
*target
);
44 static int cortex_a8_restore_context(struct target
*target
, bool bpwp
);
45 static int cortex_a8_set_breakpoint(struct target
*target
,
46 struct breakpoint
*breakpoint
, uint8_t matchmode
);
47 static int cortex_a8_unset_breakpoint(struct target
*target
,
48 struct breakpoint
*breakpoint
);
49 static int cortex_a8_dap_read_coreregister_u32(struct target
*target
,
50 uint32_t *value
, int regnum
);
51 static int cortex_a8_dap_write_coreregister_u32(struct target
*target
,
52 uint32_t value
, int regnum
);
54 * FIXME do topology discovery using the ROM; don't
55 * assume this is an OMAP3.
57 #define swjdp_memoryap 0
58 #define swjdp_debugap 1
59 #define OMAP3530_DEBUG_BASE 0x54011000
62 * Cortex-A8 Basic debug access, very low level assumes state is saved
64 static int cortex_a8_init_debug_access(struct target
*target
)
66 struct armv7a_common
*armv7a
= target_to_armv7a(target
);
67 struct swjdp_common
*swjdp
= &armv7a
->swjdp_info
;
74 /* Unlocking the debug registers for modification */
75 /* The debugport might be uninitialised so try twice */
76 retval
= mem_ap_write_atomic_u32(swjdp
, armv7a
->debug_base
+ CPUDBG_LOCKACCESS
, 0xC5ACCE55);
77 if (retval
!= ERROR_OK
)
78 mem_ap_write_atomic_u32(swjdp
, armv7a
->debug_base
+ CPUDBG_LOCKACCESS
, 0xC5ACCE55);
79 /* Clear Sticky Power Down status Bit in PRSR to enable access to
80 the registers in the Core Power Domain */
81 retval
= mem_ap_read_atomic_u32(swjdp
, armv7a
->debug_base
+ CPUDBG_PRSR
, &dummy
);
82 /* Enabling of instruction execution in debug mode is done in debug_entry code */
84 /* Resync breakpoint registers */
86 /* Since this is likley called from init or reset, update targtet state information*/
87 cortex_a8_poll(target
);
92 /* To reduce needless round-trips, pass in a pointer to the current
93 * DSCR value. Initialize it to zero if you just need to know the
94 * value on return from this function; or (1 << DSCR_INSTR_COMP) if
95 * you happen to know that no instruction is pending.
97 static int cortex_a8_exec_opcode(struct target
*target
,
98 uint32_t opcode
, uint32_t *dscr_p
)
102 struct armv7a_common
*armv7a
= target_to_armv7a(target
);
103 struct swjdp_common
*swjdp
= &armv7a
->swjdp_info
;
105 dscr
= dscr_p
? *dscr_p
: 0;
107 LOG_DEBUG("exec opcode 0x%08" PRIx32
, opcode
);
109 /* Wait for InstrCompl bit to be set */
110 while ((dscr
& (1 << DSCR_INSTR_COMP
)) == 0)
112 retval
= mem_ap_read_atomic_u32(swjdp
,
113 armv7a
->debug_base
+ CPUDBG_DSCR
, &dscr
);
114 if (retval
!= ERROR_OK
)
116 LOG_ERROR("Could not read DSCR register, opcode = 0x%08" PRIx32
, opcode
);
121 mem_ap_write_u32(swjdp
, armv7a
->debug_base
+ CPUDBG_ITR
, opcode
);
125 retval
= mem_ap_read_atomic_u32(swjdp
,
126 armv7a
->debug_base
+ CPUDBG_DSCR
, &dscr
);
127 if (retval
!= ERROR_OK
)
129 LOG_ERROR("Could not read DSCR register");
133 while ((dscr
& (1 << DSCR_INSTR_COMP
)) == 0); /* Wait for InstrCompl bit to be set */
141 /**************************************************************************
142 Read core register with very few exec_opcode, fast but needs work_area.
143 This can cause problems with MMU active.
144 **************************************************************************/
145 static int cortex_a8_read_regs_through_mem(struct target
*target
, uint32_t address
,
148 int retval
= ERROR_OK
;
149 struct armv7a_common
*armv7a
= target_to_armv7a(target
);
150 struct swjdp_common
*swjdp
= &armv7a
->swjdp_info
;
152 cortex_a8_dap_read_coreregister_u32(target
, regfile
, 0);
153 cortex_a8_dap_write_coreregister_u32(target
, address
, 0);
154 cortex_a8_exec_opcode(target
, ARMV4_5_STMIA(0, 0xFFFE, 0, 0), NULL
);
155 dap_ap_select(swjdp
, swjdp_memoryap
);
156 mem_ap_read_buf_u32(swjdp
, (uint8_t *)(®file
[1]), 4*15, address
);
157 dap_ap_select(swjdp
, swjdp_debugap
);
162 static int cortex_a8_dap_read_coreregister_u32(struct target
*target
,
163 uint32_t *value
, int regnum
)
165 int retval
= ERROR_OK
;
166 uint8_t reg
= regnum
&0xFF;
168 struct armv7a_common
*armv7a
= target_to_armv7a(target
);
169 struct swjdp_common
*swjdp
= &armv7a
->swjdp_info
;
176 /* Rn to DCCTX, "MCR p14, 0, Rn, c0, c5, 0" 0xEE00nE15 */
177 cortex_a8_exec_opcode(target
,
178 ARMV4_5_MCR(14, 0, reg
, 0, 5, 0),
183 /* "MOV r0, r15"; then move r0 to DCCTX */
184 cortex_a8_exec_opcode(target
, 0xE1A0000F, &dscr
);
185 cortex_a8_exec_opcode(target
,
186 ARMV4_5_MCR(14, 0, 0, 0, 5, 0),
191 /* "MRS r0, CPSR" or "MRS r0, SPSR"
192 * then move r0 to DCCTX
194 cortex_a8_exec_opcode(target
, ARMV4_5_MRS(0, reg
& 1), &dscr
);
195 cortex_a8_exec_opcode(target
,
196 ARMV4_5_MCR(14, 0, 0, 0, 5, 0),
200 /* Wait for DTRRXfull then read DTRRTX */
201 while ((dscr
& (1 << DSCR_DTR_TX_FULL
)) == 0)
203 retval
= mem_ap_read_atomic_u32(swjdp
,
204 armv7a
->debug_base
+ CPUDBG_DSCR
, &dscr
);
207 retval
= mem_ap_read_atomic_u32(swjdp
,
208 armv7a
->debug_base
+ CPUDBG_DTRTX
, value
);
209 LOG_DEBUG("read DCC 0x%08" PRIx32
, *value
);
214 static int cortex_a8_dap_write_coreregister_u32(struct target
*target
,
215 uint32_t value
, int regnum
)
217 int retval
= ERROR_OK
;
218 uint8_t Rd
= regnum
&0xFF;
220 struct armv7a_common
*armv7a
= target_to_armv7a(target
);
221 struct swjdp_common
*swjdp
= &armv7a
->swjdp_info
;
223 LOG_DEBUG("register %i, value 0x%08" PRIx32
, regnum
, value
);
225 /* Check that DCCRX is not full */
226 retval
= mem_ap_read_atomic_u32(swjdp
,
227 armv7a
->debug_base
+ CPUDBG_DSCR
, &dscr
);
228 if (dscr
& (1 << DSCR_DTR_RX_FULL
))
230 LOG_ERROR("DSCR_DTR_RX_FULL, dscr 0x%08" PRIx32
, dscr
);
231 /* Clear DCCRX with MCR(p14, 0, Rd, c0, c5, 0), opcode 0xEE000E15 */
232 cortex_a8_exec_opcode(target
, ARMV4_5_MRC(14, 0, 0, 0, 5, 0),
239 /* Write DTRRX ... sets DSCR.DTRRXfull but exec_opcode() won't care */
240 LOG_DEBUG("write DCC 0x%08" PRIx32
, value
);
241 retval
= mem_ap_write_u32(swjdp
,
242 armv7a
->debug_base
+ CPUDBG_DTRRX
, value
);
246 /* DCCRX to Rn, "MCR p14, 0, Rn, c0, c5, 0", 0xEE00nE15 */
247 cortex_a8_exec_opcode(target
, ARMV4_5_MRC(14, 0, Rd
, 0, 5, 0),
252 /* DCCRX to R0, "MCR p14, 0, R0, c0, c5, 0", 0xEE000E15
255 cortex_a8_exec_opcode(target
, ARMV4_5_MRC(14, 0, 0, 0, 5, 0),
257 cortex_a8_exec_opcode(target
, 0xE1A0F000, &dscr
);
261 /* DCCRX to R0, "MCR p14, 0, R0, c0, c5, 0", 0xEE000E15
262 * then "MSR CPSR_cxsf, r0" or "MSR SPSR_cxsf, r0" (all fields)
264 cortex_a8_exec_opcode(target
, ARMV4_5_MRC(14, 0, 0, 0, 5, 0),
266 cortex_a8_exec_opcode(target
, ARMV4_5_MSR_GP(0, 0xF, Rd
& 1),
269 /* "Prefetch flush" after modifying execution status in CPSR */
271 cortex_a8_exec_opcode(target
,
272 ARMV4_5_MCR(15, 0, 0, 7, 5, 4),
279 /* Write to memory mapped registers directly with no cache or mmu handling */
280 static int cortex_a8_dap_write_memap_register_u32(struct target
*target
, uint32_t address
, uint32_t value
)
283 struct armv7a_common
*armv7a
= target_to_armv7a(target
);
284 struct swjdp_common
*swjdp
= &armv7a
->swjdp_info
;
286 retval
= mem_ap_write_atomic_u32(swjdp
, address
, value
);
292 * Cortex-A8 implementation of Debug Programmer's Model
294 * NOTE the invariant: these routines return with DSCR_INSTR_COMP set,
295 * so there's no need to poll for it before executing an instruction.
297 * NOTE that in several of these cases the "stall" mode might be useful.
298 * It'd let us queue a few operations together... prepare/finish might
299 * be the places to enable/disable that mode.
302 static inline struct cortex_a8_common
*dpm_to_a8(struct arm_dpm
*dpm
)
304 return container_of(dpm
, struct cortex_a8_common
, armv7a_common
.dpm
);
307 static int cortex_a8_write_dcc(struct cortex_a8_common
*a8
, uint32_t data
)
309 LOG_DEBUG("write DCC 0x%08" PRIx32
, data
);
310 return mem_ap_write_u32(&a8
->armv7a_common
.swjdp_info
,
311 a8
->armv7a_common
.debug_base
+ CPUDBG_DTRRX
, data
);
314 static int cortex_a8_read_dcc(struct cortex_a8_common
*a8
, uint32_t *data
,
317 struct swjdp_common
*swjdp
= &a8
->armv7a_common
.swjdp_info
;
318 uint32_t dscr
= 1 << DSCR_INSTR_COMP
;
324 /* Wait for DTRRXfull */
325 while ((dscr
& (1 << DSCR_DTR_TX_FULL
)) == 0) {
326 retval
= mem_ap_read_atomic_u32(swjdp
,
327 a8
->armv7a_common
.debug_base
+ CPUDBG_DSCR
,
331 retval
= mem_ap_read_atomic_u32(swjdp
,
332 a8
->armv7a_common
.debug_base
+ CPUDBG_DTRTX
, data
);
333 //LOG_DEBUG("read DCC 0x%08" PRIx32, *data);
341 static int cortex_a8_dpm_prepare(struct arm_dpm
*dpm
)
343 struct cortex_a8_common
*a8
= dpm_to_a8(dpm
);
344 struct swjdp_common
*swjdp
= &a8
->armv7a_common
.swjdp_info
;
348 /* set up invariant: INSTR_COMP is set after ever DPM operation */
350 retval
= mem_ap_read_atomic_u32(swjdp
,
351 a8
->armv7a_common
.debug_base
+ CPUDBG_DSCR
,
353 } while ((dscr
& (1 << DSCR_INSTR_COMP
)) == 0);
355 /* this "should never happen" ... */
356 if (dscr
& (1 << DSCR_DTR_RX_FULL
)) {
357 LOG_ERROR("DSCR_DTR_RX_FULL, dscr 0x%08" PRIx32
, dscr
);
359 retval
= cortex_a8_exec_opcode(
360 a8
->armv7a_common
.armv4_5_common
.target
,
361 ARMV4_5_MRC(14, 0, 0, 0, 5, 0),
368 static int cortex_a8_dpm_finish(struct arm_dpm
*dpm
)
370 /* REVISIT what could be done here? */
374 static int cortex_a8_instr_write_data_dcc(struct arm_dpm
*dpm
,
375 uint32_t opcode
, uint32_t data
)
377 struct cortex_a8_common
*a8
= dpm_to_a8(dpm
);
379 uint32_t dscr
= 1 << DSCR_INSTR_COMP
;
381 retval
= cortex_a8_write_dcc(a8
, data
);
383 return cortex_a8_exec_opcode(
384 a8
->armv7a_common
.armv4_5_common
.target
,
389 static int cortex_a8_instr_write_data_r0(struct arm_dpm
*dpm
,
390 uint32_t opcode
, uint32_t data
)
392 struct cortex_a8_common
*a8
= dpm_to_a8(dpm
);
393 uint32_t dscr
= 1 << DSCR_INSTR_COMP
;
396 retval
= cortex_a8_write_dcc(a8
, data
);
398 /* DCCRX to R0, "MCR p14, 0, R0, c0, c5, 0", 0xEE000E15 */
399 retval
= cortex_a8_exec_opcode(
400 a8
->armv7a_common
.armv4_5_common
.target
,
401 ARMV4_5_MRC(14, 0, 0, 0, 5, 0),
404 /* then the opcode, taking data from R0 */
405 retval
= cortex_a8_exec_opcode(
406 a8
->armv7a_common
.armv4_5_common
.target
,
413 static int cortex_a8_instr_cpsr_sync(struct arm_dpm
*dpm
)
415 struct target
*target
= dpm
->arm
->target
;
416 uint32_t dscr
= 1 << DSCR_INSTR_COMP
;
418 /* "Prefetch flush" after modifying execution status in CPSR */
419 return cortex_a8_exec_opcode(target
,
420 ARMV4_5_MCR(15, 0, 0, 7, 5, 4),
424 static int cortex_a8_instr_read_data_dcc(struct arm_dpm
*dpm
,
425 uint32_t opcode
, uint32_t *data
)
427 struct cortex_a8_common
*a8
= dpm_to_a8(dpm
);
429 uint32_t dscr
= 1 << DSCR_INSTR_COMP
;
431 /* the opcode, writing data to DCC */
432 retval
= cortex_a8_exec_opcode(
433 a8
->armv7a_common
.armv4_5_common
.target
,
437 return cortex_a8_read_dcc(a8
, data
, &dscr
);
441 static int cortex_a8_instr_read_data_r0(struct arm_dpm
*dpm
,
442 uint32_t opcode
, uint32_t *data
)
444 struct cortex_a8_common
*a8
= dpm_to_a8(dpm
);
445 uint32_t dscr
= 1 << DSCR_INSTR_COMP
;
448 /* the opcode, writing data to R0 */
449 retval
= cortex_a8_exec_opcode(
450 a8
->armv7a_common
.armv4_5_common
.target
,
454 /* write R0 to DCC */
455 retval
= cortex_a8_exec_opcode(
456 a8
->armv7a_common
.armv4_5_common
.target
,
457 ARMV4_5_MCR(14, 0, 0, 0, 5, 0),
460 return cortex_a8_read_dcc(a8
, data
, &dscr
);
463 static int cortex_a8_bpwp_enable(struct arm_dpm
*dpm
, unsigned index
,
464 uint32_t addr
, uint32_t control
)
466 struct cortex_a8_common
*a8
= dpm_to_a8(dpm
);
467 uint32_t vr
= a8
->armv7a_common
.debug_base
;
468 uint32_t cr
= a8
->armv7a_common
.debug_base
;
472 case 0 ... 15: /* breakpoints */
473 vr
+= CPUDBG_BVR_BASE
;
474 cr
+= CPUDBG_BCR_BASE
;
476 case 16 ... 31: /* watchpoints */
477 vr
+= CPUDBG_WVR_BASE
;
478 cr
+= CPUDBG_WCR_BASE
;
487 LOG_DEBUG("A8: bpwp enable, vr %08x cr %08x",
488 (unsigned) vr
, (unsigned) cr
);
490 retval
= cortex_a8_dap_write_memap_register_u32(dpm
->arm
->target
,
492 if (retval
!= ERROR_OK
)
494 retval
= cortex_a8_dap_write_memap_register_u32(dpm
->arm
->target
,
499 static int cortex_a8_bpwp_disable(struct arm_dpm
*dpm
, unsigned index
)
501 struct cortex_a8_common
*a8
= dpm_to_a8(dpm
);
506 cr
= a8
->armv7a_common
.debug_base
+ CPUDBG_BCR_BASE
;
509 cr
= a8
->armv7a_common
.debug_base
+ CPUDBG_WCR_BASE
;
517 LOG_DEBUG("A8: bpwp disable, cr %08x", (unsigned) cr
);
519 /* clear control register */
520 return cortex_a8_dap_write_memap_register_u32(dpm
->arm
->target
, cr
, 0);
523 static int cortex_a8_dpm_setup(struct cortex_a8_common
*a8
, uint32_t didr
)
525 struct arm_dpm
*dpm
= &a8
->armv7a_common
.dpm
;
527 dpm
->arm
= &a8
->armv7a_common
.armv4_5_common
;
530 dpm
->prepare
= cortex_a8_dpm_prepare
;
531 dpm
->finish
= cortex_a8_dpm_finish
;
533 dpm
->instr_write_data_dcc
= cortex_a8_instr_write_data_dcc
;
534 dpm
->instr_write_data_r0
= cortex_a8_instr_write_data_r0
;
535 dpm
->instr_cpsr_sync
= cortex_a8_instr_cpsr_sync
;
537 dpm
->instr_read_data_dcc
= cortex_a8_instr_read_data_dcc
;
538 dpm
->instr_read_data_r0
= cortex_a8_instr_read_data_r0
;
540 dpm
->bpwp_enable
= cortex_a8_bpwp_enable
;
541 dpm
->bpwp_disable
= cortex_a8_bpwp_disable
;
543 return arm_dpm_setup(dpm
);
548 * Cortex-A8 Run control
551 static int cortex_a8_poll(struct target
*target
)
553 int retval
= ERROR_OK
;
555 struct cortex_a8_common
*cortex_a8
= target_to_cortex_a8(target
);
556 struct armv7a_common
*armv7a
= &cortex_a8
->armv7a_common
;
557 struct swjdp_common
*swjdp
= &armv7a
->swjdp_info
;
558 enum target_state prev_target_state
= target
->state
;
559 uint8_t saved_apsel
= dap_ap_get_select(swjdp
);
561 dap_ap_select(swjdp
, swjdp_debugap
);
562 retval
= mem_ap_read_atomic_u32(swjdp
,
563 armv7a
->debug_base
+ CPUDBG_DSCR
, &dscr
);
564 if (retval
!= ERROR_OK
)
566 dap_ap_select(swjdp
, saved_apsel
);
569 cortex_a8
->cpudbg_dscr
= dscr
;
571 if ((dscr
& 0x3) == 0x3)
573 if (prev_target_state
!= TARGET_HALTED
)
575 /* We have a halting debug event */
576 LOG_DEBUG("Target halted");
577 target
->state
= TARGET_HALTED
;
578 if ((prev_target_state
== TARGET_RUNNING
)
579 || (prev_target_state
== TARGET_RESET
))
581 retval
= cortex_a8_debug_entry(target
);
582 if (retval
!= ERROR_OK
)
585 target_call_event_callbacks(target
,
586 TARGET_EVENT_HALTED
);
588 if (prev_target_state
== TARGET_DEBUG_RUNNING
)
592 retval
= cortex_a8_debug_entry(target
);
593 if (retval
!= ERROR_OK
)
596 target_call_event_callbacks(target
,
597 TARGET_EVENT_DEBUG_HALTED
);
601 else if ((dscr
& 0x3) == 0x2)
603 target
->state
= TARGET_RUNNING
;
607 LOG_DEBUG("Unknown target state dscr = 0x%08" PRIx32
, dscr
);
608 target
->state
= TARGET_UNKNOWN
;
611 dap_ap_select(swjdp
, saved_apsel
);
616 static int cortex_a8_halt(struct target
*target
)
618 int retval
= ERROR_OK
;
620 struct armv7a_common
*armv7a
= target_to_armv7a(target
);
621 struct swjdp_common
*swjdp
= &armv7a
->swjdp_info
;
622 uint8_t saved_apsel
= dap_ap_get_select(swjdp
);
623 dap_ap_select(swjdp
, swjdp_debugap
);
626 * Tell the core to be halted by writing DRCR with 0x1
627 * and then wait for the core to be halted.
629 retval
= mem_ap_write_atomic_u32(swjdp
,
630 armv7a
->debug_base
+ CPUDBG_DRCR
, 0x1);
633 * enter halting debug mode
635 mem_ap_read_atomic_u32(swjdp
, armv7a
->debug_base
+ CPUDBG_DSCR
, &dscr
);
636 retval
= mem_ap_write_atomic_u32(swjdp
,
637 armv7a
->debug_base
+ CPUDBG_DSCR
, dscr
| (1 << DSCR_HALT_DBG_MODE
));
639 if (retval
!= ERROR_OK
)
643 mem_ap_read_atomic_u32(swjdp
,
644 armv7a
->debug_base
+ CPUDBG_DSCR
, &dscr
);
645 } while ((dscr
& (1 << DSCR_CORE_HALTED
)) == 0);
647 target
->debug_reason
= DBG_REASON_DBGRQ
;
650 dap_ap_select(swjdp
, saved_apsel
);
654 static int cortex_a8_resume(struct target
*target
, int current
,
655 uint32_t address
, int handle_breakpoints
, int debug_execution
)
657 struct armv7a_common
*armv7a
= target_to_armv7a(target
);
658 struct arm
*armv4_5
= &armv7a
->armv4_5_common
;
659 struct swjdp_common
*swjdp
= &armv7a
->swjdp_info
;
661 // struct breakpoint *breakpoint = NULL;
662 uint32_t resume_pc
, dscr
;
664 uint8_t saved_apsel
= dap_ap_get_select(swjdp
);
665 dap_ap_select(swjdp
, swjdp_debugap
);
667 if (!debug_execution
)
668 target_free_all_working_areas(target
);
673 /* Disable interrupts */
674 /* We disable interrupts in the PRIMASK register instead of
675 * masking with C_MASKINTS,
676 * This is probably the same issue as Cortex-M3 Errata 377493:
677 * C_MASKINTS in parallel with disabled interrupts can cause
678 * local faults to not be taken. */
679 buf_set_u32(armv7m
->core_cache
->reg_list
[ARMV7M_PRIMASK
].value
, 0, 32, 1);
680 armv7m
->core_cache
->reg_list
[ARMV7M_PRIMASK
].dirty
= 1;
681 armv7m
->core_cache
->reg_list
[ARMV7M_PRIMASK
].valid
= 1;
683 /* Make sure we are in Thumb mode */
684 buf_set_u32(armv7m
->core_cache
->reg_list
[ARMV7M_xPSR
].value
, 0, 32,
685 buf_get_u32(armv7m
->core_cache
->reg_list
[ARMV7M_xPSR
].value
, 0, 32) | (1 << 24));
686 armv7m
->core_cache
->reg_list
[ARMV7M_xPSR
].dirty
= 1;
687 armv7m
->core_cache
->reg_list
[ARMV7M_xPSR
].valid
= 1;
691 /* current = 1: continue on current pc, otherwise continue at <address> */
692 resume_pc
= buf_get_u32(
693 armv4_5
->core_cache
->reg_list
[15].value
,
698 /* Make sure that the Armv7 gdb thumb fixups does not
699 * kill the return address
701 switch (armv4_5
->core_state
)
703 case ARMV4_5_STATE_ARM
:
704 resume_pc
&= 0xFFFFFFFC;
706 case ARMV4_5_STATE_THUMB
:
707 case ARM_STATE_THUMB_EE
:
708 /* When the return address is loaded into PC
709 * bit 0 must be 1 to stay in Thumb state
713 case ARMV4_5_STATE_JAZELLE
:
714 LOG_ERROR("How do I resume into Jazelle state??");
717 LOG_DEBUG("resume pc = 0x%08" PRIx32
, resume_pc
);
718 buf_set_u32(armv4_5
->core_cache
->reg_list
[15].value
,
720 armv4_5
->core_cache
->reg_list
[15].dirty
= 1;
721 armv4_5
->core_cache
->reg_list
[15].valid
= 1;
723 cortex_a8_restore_context(target
, handle_breakpoints
);
726 /* the front-end may request us not to handle breakpoints */
727 if (handle_breakpoints
)
729 /* Single step past breakpoint at current address */
730 if ((breakpoint
= breakpoint_find(target
, resume_pc
)))
732 LOG_DEBUG("unset breakpoint at 0x%8.8x", breakpoint
->address
);
733 cortex_m3_unset_breakpoint(target
, breakpoint
);
734 cortex_m3_single_step_core(target
);
735 cortex_m3_set_breakpoint(target
, breakpoint
);
740 /* Restart core and wait for it to be started */
741 mem_ap_write_atomic_u32(swjdp
, armv7a
->debug_base
+ CPUDBG_DRCR
, 0x2);
744 mem_ap_read_atomic_u32(swjdp
,
745 armv7a
->debug_base
+ CPUDBG_DSCR
, &dscr
);
746 } while ((dscr
& (1 << DSCR_CORE_RESTARTED
)) == 0);
748 target
->debug_reason
= DBG_REASON_NOTHALTED
;
749 target
->state
= TARGET_RUNNING
;
751 /* registers are now invalid */
752 register_cache_invalidate(armv4_5
->core_cache
);
754 if (!debug_execution
)
756 target
->state
= TARGET_RUNNING
;
757 target_call_event_callbacks(target
, TARGET_EVENT_RESUMED
);
758 LOG_DEBUG("target resumed at 0x%" PRIx32
, resume_pc
);
762 target
->state
= TARGET_DEBUG_RUNNING
;
763 target_call_event_callbacks(target
, TARGET_EVENT_DEBUG_RESUMED
);
764 LOG_DEBUG("target debug resumed at 0x%" PRIx32
, resume_pc
);
767 dap_ap_select(swjdp
, saved_apsel
);
772 static int cortex_a8_debug_entry(struct target
*target
)
775 uint32_t regfile
[16], pc
, cpsr
, dscr
;
776 int retval
= ERROR_OK
;
777 struct working_area
*regfile_working_area
= NULL
;
778 struct cortex_a8_common
*cortex_a8
= target_to_cortex_a8(target
);
779 struct armv7a_common
*armv7a
= target_to_armv7a(target
);
780 struct arm
*armv4_5
= &armv7a
->armv4_5_common
;
781 struct swjdp_common
*swjdp
= &armv7a
->swjdp_info
;
784 LOG_DEBUG("dscr = 0x%08" PRIx32
, cortex_a8
->cpudbg_dscr
);
786 /* Enable the ITR execution once we are in debug mode */
787 mem_ap_read_atomic_u32(swjdp
,
788 armv7a
->debug_base
+ CPUDBG_DSCR
, &dscr
);
790 /* REVISIT see A8 TRM 12.11.4 steps 2..3 -- make sure that any
791 * imprecise data aborts get discarded by issuing a Data
792 * Synchronization Barrier: ARMV4_5_MCR(15, 0, 0, 7, 10, 4).
795 dscr
|= (1 << DSCR_EXT_INT_EN
);
796 retval
= mem_ap_write_atomic_u32(swjdp
,
797 armv7a
->debug_base
+ CPUDBG_DSCR
, dscr
);
799 /* Examine debug reason */
800 switch ((cortex_a8
->cpudbg_dscr
>> 2)&0xF)
802 case 0: /* DRCR[0] write */
804 target
->debug_reason
= DBG_REASON_DBGRQ
;
806 case 1: /* HW breakpoint */
807 case 3: /* SW BKPT */
808 case 5: /* vector catch */
809 target
->debug_reason
= DBG_REASON_BREAKPOINT
;
811 case 2: /* asynch watchpoint */
812 case 10: /* precise watchpoint */
813 target
->debug_reason
= DBG_REASON_WATCHPOINT
;
814 /* REVISIT could collect WFAR later, to see just
815 * which instruction triggered the watchpoint.
819 target
->debug_reason
= DBG_REASON_UNDEFINED
;
823 /* REVISIT fast_reg_read is never set ... */
825 /* Examine target state and mode */
826 if (cortex_a8
->fast_reg_read
)
827 target_alloc_working_area(target
, 64, ®file_working_area
);
829 /* First load register acessible through core debug port*/
830 if (!regfile_working_area
)
832 retval
= arm_dpm_read_current_registers(&armv7a
->dpm
);
836 dap_ap_select(swjdp
, swjdp_memoryap
);
837 cortex_a8_read_regs_through_mem(target
,
838 regfile_working_area
->address
, regfile
);
839 dap_ap_select(swjdp
, swjdp_memoryap
);
840 target_free_working_area(target
, regfile_working_area
);
842 /* read Current PSR */
843 cortex_a8_dap_read_coreregister_u32(target
, &cpsr
, 16);
845 dap_ap_select(swjdp
, swjdp_debugap
);
846 LOG_DEBUG("cpsr: %8.8" PRIx32
, cpsr
);
848 arm_set_cpsr(armv4_5
, cpsr
);
851 for (i
= 0; i
<= ARM_PC
; i
++)
853 reg
= arm_reg_current(armv4_5
, i
);
855 buf_set_u32(reg
->value
, 0, 32, regfile
[i
]);
860 /* Fixup PC Resume Address */
863 // T bit set for Thumb or ThumbEE state
864 regfile
[ARM_PC
] -= 4;
869 regfile
[ARM_PC
] -= 8;
872 reg
= armv4_5
->core_cache
->reg_list
+ 15;
873 buf_set_u32(reg
->value
, 0, 32, regfile
[ARM_PC
]);
874 reg
->dirty
= reg
->valid
;
878 /* TODO, Move this */
879 uint32_t cp15_control_register
, cp15_cacr
, cp15_nacr
;
880 cortex_a8_read_cp(target
, &cp15_control_register
, 15, 0, 1, 0, 0);
881 LOG_DEBUG("cp15_control_register = 0x%08x", cp15_control_register
);
883 cortex_a8_read_cp(target
, &cp15_cacr
, 15, 0, 1, 0, 2);
884 LOG_DEBUG("cp15 Coprocessor Access Control Register = 0x%08x", cp15_cacr
);
886 cortex_a8_read_cp(target
, &cp15_nacr
, 15, 0, 1, 1, 2);
887 LOG_DEBUG("cp15 Nonsecure Access Control Register = 0x%08x", cp15_nacr
);
890 /* Are we in an exception handler */
891 // armv4_5->exception_number = 0;
892 if (armv7a
->post_debug_entry
)
893 armv7a
->post_debug_entry(target
);
901 static void cortex_a8_post_debug_entry(struct target
*target
)
903 struct cortex_a8_common
*cortex_a8
= target_to_cortex_a8(target
);
904 struct armv7a_common
*armv7a
= &cortex_a8
->armv7a_common
;
907 /* MRC p15,0,<Rt>,c1,c0,0 ; Read CP15 System Control Register */
908 retval
= armv7a
->armv4_5_common
.mrc(target
, 15,
911 &cortex_a8
->cp15_control_reg
);
912 LOG_DEBUG("cp15_control_reg: %8.8" PRIx32
, cortex_a8
->cp15_control_reg
);
914 if (armv7a
->armv4_5_mmu
.armv4_5_cache
.ctype
== -1)
916 uint32_t cache_type_reg
;
918 /* MRC p15,0,<Rt>,c0,c0,1 ; Read CP15 Cache Type Register */
919 retval
= armv7a
->armv4_5_common
.mrc(target
, 15,
923 LOG_DEBUG("cp15 cache type: %8.8x", (unsigned) cache_type_reg
);
925 /* FIXME the armv4_4 cache info DOES NOT APPLY to Cortex-A8 */
926 armv4_5_identify_cache(cache_type_reg
,
927 &armv7a
->armv4_5_mmu
.armv4_5_cache
);
930 armv7a
->armv4_5_mmu
.mmu_enabled
=
931 (cortex_a8
->cp15_control_reg
& 0x1U
) ? 1 : 0;
932 armv7a
->armv4_5_mmu
.armv4_5_cache
.d_u_cache_enabled
=
933 (cortex_a8
->cp15_control_reg
& 0x4U
) ? 1 : 0;
934 armv7a
->armv4_5_mmu
.armv4_5_cache
.i_cache_enabled
=
935 (cortex_a8
->cp15_control_reg
& 0x1000U
) ? 1 : 0;
940 static int cortex_a8_step(struct target
*target
, int current
, uint32_t address
,
941 int handle_breakpoints
)
943 struct armv7a_common
*armv7a
= target_to_armv7a(target
);
944 struct arm
*armv4_5
= &armv7a
->armv4_5_common
;
945 struct breakpoint
*breakpoint
= NULL
;
946 struct breakpoint stepbreakpoint
;
951 if (target
->state
!= TARGET_HALTED
)
953 LOG_WARNING("target not halted");
954 return ERROR_TARGET_NOT_HALTED
;
957 /* current = 1: continue on current pc, otherwise continue at <address> */
958 r
= armv4_5
->core_cache
->reg_list
+ 15;
961 buf_set_u32(r
->value
, 0, 32, address
);
965 address
= buf_get_u32(r
->value
, 0, 32);
968 /* The front-end may request us not to handle breakpoints.
969 * But since Cortex-A8 uses breakpoint for single step,
970 * we MUST handle breakpoints.
972 handle_breakpoints
= 1;
973 if (handle_breakpoints
) {
974 breakpoint
= breakpoint_find(target
, address
);
976 cortex_a8_unset_breakpoint(target
, breakpoint
);
979 /* Setup single step breakpoint */
980 stepbreakpoint
.address
= address
;
981 stepbreakpoint
.length
= (armv4_5
->core_state
== ARMV4_5_STATE_THUMB
)
983 stepbreakpoint
.type
= BKPT_HARD
;
984 stepbreakpoint
.set
= 0;
986 /* Break on IVA mismatch */
987 cortex_a8_set_breakpoint(target
, &stepbreakpoint
, 0x04);
989 target
->debug_reason
= DBG_REASON_SINGLESTEP
;
991 cortex_a8_resume(target
, 1, address
, 0, 0);
993 while (target
->state
!= TARGET_HALTED
)
995 cortex_a8_poll(target
);
998 LOG_WARNING("timeout waiting for target halt");
1003 cortex_a8_unset_breakpoint(target
, &stepbreakpoint
);
1004 if (timeout
> 0) target
->debug_reason
= DBG_REASON_BREAKPOINT
;
1007 cortex_a8_set_breakpoint(target
, breakpoint
, 0);
1009 if (target
->state
!= TARGET_HALTED
)
1010 LOG_DEBUG("target stepped");
1015 static int cortex_a8_restore_context(struct target
*target
, bool bpwp
)
1017 struct armv7a_common
*armv7a
= target_to_armv7a(target
);
1021 if (armv7a
->pre_restore_context
)
1022 armv7a
->pre_restore_context(target
);
1024 arm_dpm_write_dirty_registers(&armv7a
->dpm
, bpwp
);
1026 if (armv7a
->post_restore_context
)
1027 armv7a
->post_restore_context(target
);
1034 * Cortex-A8 Breakpoint and watchpoint fuctions
1037 /* Setup hardware Breakpoint Register Pair */
1038 static int cortex_a8_set_breakpoint(struct target
*target
,
1039 struct breakpoint
*breakpoint
, uint8_t matchmode
)
1044 uint8_t byte_addr_select
= 0x0F;
1045 struct cortex_a8_common
*cortex_a8
= target_to_cortex_a8(target
);
1046 struct armv7a_common
*armv7a
= &cortex_a8
->armv7a_common
;
1047 struct cortex_a8_brp
* brp_list
= cortex_a8
->brp_list
;
1049 if (breakpoint
->set
)
1051 LOG_WARNING("breakpoint already set");
1055 if (breakpoint
->type
== BKPT_HARD
)
1057 while (brp_list
[brp_i
].used
&& (brp_i
< cortex_a8
->brp_num
))
1059 if (brp_i
>= cortex_a8
->brp_num
)
1061 LOG_ERROR("ERROR Can not find free Breakpoint Register Pair");
1064 breakpoint
->set
= brp_i
+ 1;
1065 if (breakpoint
->length
== 2)
1067 byte_addr_select
= (3 << (breakpoint
->address
& 0x02));
1069 control
= ((matchmode
& 0x7) << 20)
1070 | (byte_addr_select
<< 5)
1072 brp_list
[brp_i
].used
= 1;
1073 brp_list
[brp_i
].value
= (breakpoint
->address
& 0xFFFFFFFC);
1074 brp_list
[brp_i
].control
= control
;
1075 cortex_a8_dap_write_memap_register_u32(target
, armv7a
->debug_base
1076 + CPUDBG_BVR_BASE
+ 4 * brp_list
[brp_i
].BRPn
,
1077 brp_list
[brp_i
].value
);
1078 cortex_a8_dap_write_memap_register_u32(target
, armv7a
->debug_base
1079 + CPUDBG_BCR_BASE
+ 4 * brp_list
[brp_i
].BRPn
,
1080 brp_list
[brp_i
].control
);
1081 LOG_DEBUG("brp %i control 0x%0" PRIx32
" value 0x%0" PRIx32
, brp_i
,
1082 brp_list
[brp_i
].control
,
1083 brp_list
[brp_i
].value
);
1085 else if (breakpoint
->type
== BKPT_SOFT
)
1088 if (breakpoint
->length
== 2)
1090 buf_set_u32(code
, 0, 32, ARMV5_T_BKPT(0x11));
1094 buf_set_u32(code
, 0, 32, ARMV5_BKPT(0x11));
1096 retval
= target
->type
->read_memory(target
,
1097 breakpoint
->address
& 0xFFFFFFFE,
1098 breakpoint
->length
, 1,
1099 breakpoint
->orig_instr
);
1100 if (retval
!= ERROR_OK
)
1102 retval
= target
->type
->write_memory(target
,
1103 breakpoint
->address
& 0xFFFFFFFE,
1104 breakpoint
->length
, 1, code
);
1105 if (retval
!= ERROR_OK
)
1107 breakpoint
->set
= 0x11; /* Any nice value but 0 */
1113 static int cortex_a8_unset_breakpoint(struct target
*target
, struct breakpoint
*breakpoint
)
1116 struct cortex_a8_common
*cortex_a8
= target_to_cortex_a8(target
);
1117 struct armv7a_common
*armv7a
= &cortex_a8
->armv7a_common
;
1118 struct cortex_a8_brp
* brp_list
= cortex_a8
->brp_list
;
1120 if (!breakpoint
->set
)
1122 LOG_WARNING("breakpoint not set");
1126 if (breakpoint
->type
== BKPT_HARD
)
1128 int brp_i
= breakpoint
->set
- 1;
1129 if ((brp_i
< 0) || (brp_i
>= cortex_a8
->brp_num
))
1131 LOG_DEBUG("Invalid BRP number in breakpoint");
1134 LOG_DEBUG("rbp %i control 0x%0" PRIx32
" value 0x%0" PRIx32
, brp_i
,
1135 brp_list
[brp_i
].control
, brp_list
[brp_i
].value
);
1136 brp_list
[brp_i
].used
= 0;
1137 brp_list
[brp_i
].value
= 0;
1138 brp_list
[brp_i
].control
= 0;
1139 cortex_a8_dap_write_memap_register_u32(target
, armv7a
->debug_base
1140 + CPUDBG_BCR_BASE
+ 4 * brp_list
[brp_i
].BRPn
,
1141 brp_list
[brp_i
].control
);
1142 cortex_a8_dap_write_memap_register_u32(target
, armv7a
->debug_base
1143 + CPUDBG_BVR_BASE
+ 4 * brp_list
[brp_i
].BRPn
,
1144 brp_list
[brp_i
].value
);
1148 /* restore original instruction (kept in target endianness) */
1149 if (breakpoint
->length
== 4)
1151 retval
= target
->type
->write_memory(target
,
1152 breakpoint
->address
& 0xFFFFFFFE,
1153 4, 1, breakpoint
->orig_instr
);
1154 if (retval
!= ERROR_OK
)
1159 retval
= target
->type
->write_memory(target
,
1160 breakpoint
->address
& 0xFFFFFFFE,
1161 2, 1, breakpoint
->orig_instr
);
1162 if (retval
!= ERROR_OK
)
1166 breakpoint
->set
= 0;
1171 static int cortex_a8_add_breakpoint(struct target
*target
,
1172 struct breakpoint
*breakpoint
)
1174 struct cortex_a8_common
*cortex_a8
= target_to_cortex_a8(target
);
1176 if ((breakpoint
->type
== BKPT_HARD
) && (cortex_a8
->brp_num_available
< 1))
1178 LOG_INFO("no hardware breakpoint available");
1179 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
1182 if (breakpoint
->type
== BKPT_HARD
)
1183 cortex_a8
->brp_num_available
--;
1184 cortex_a8_set_breakpoint(target
, breakpoint
, 0x00); /* Exact match */
1189 static int cortex_a8_remove_breakpoint(struct target
*target
, struct breakpoint
*breakpoint
)
1191 struct cortex_a8_common
*cortex_a8
= target_to_cortex_a8(target
);
1194 /* It is perfectly possible to remove brakpoints while the taget is running */
1195 if (target
->state
!= TARGET_HALTED
)
1197 LOG_WARNING("target not halted");
1198 return ERROR_TARGET_NOT_HALTED
;
1202 if (breakpoint
->set
)
1204 cortex_a8_unset_breakpoint(target
, breakpoint
);
1205 if (breakpoint
->type
== BKPT_HARD
)
1206 cortex_a8
->brp_num_available
++ ;
1216 * Cortex-A8 Reset fuctions
1219 static int cortex_a8_assert_reset(struct target
*target
)
1221 struct armv7a_common
*armv7a
= target_to_armv7a(target
);
1225 /* FIXME when halt is requested, make it work somehow... */
1227 /* Issue some kind of warm reset. */
1228 if (target_has_event_action(target
, TARGET_EVENT_RESET_ASSERT
)) {
1229 target_handle_event(target
, TARGET_EVENT_RESET_ASSERT
);
1230 } else if (jtag_get_reset_config() & RESET_HAS_SRST
) {
1231 /* REVISIT handle "pulls" cases, if there's
1232 * hardware that needs them to work.
1234 jtag_add_reset(0, 1);
1236 LOG_ERROR("%s: how to reset?", target_name(target
));
1240 /* registers are now invalid */
1241 register_cache_invalidate(armv7a
->armv4_5_common
.core_cache
);
1243 target
->state
= TARGET_RESET
;
1248 static int cortex_a8_deassert_reset(struct target
*target
)
1254 /* be certain SRST is off */
1255 jtag_add_reset(0, 0);
1257 retval
= cortex_a8_poll(target
);
1259 if (target
->reset_halt
) {
1260 if (target
->state
!= TARGET_HALTED
) {
1261 LOG_WARNING("%s: ran after reset and before halt ...",
1262 target_name(target
));
1263 if ((retval
= target_halt(target
)) != ERROR_OK
)
1272 * Cortex-A8 Memory access
1274 * This is same Cortex M3 but we must also use the correct
1275 * ap number for every access.
1278 static int cortex_a8_read_memory(struct target
*target
, uint32_t address
,
1279 uint32_t size
, uint32_t count
, uint8_t *buffer
)
1281 struct armv7a_common
*armv7a
= target_to_armv7a(target
);
1282 struct swjdp_common
*swjdp
= &armv7a
->swjdp_info
;
1283 int retval
= ERROR_INVALID_ARGUMENTS
;
1285 /* cortex_a8 handles unaligned memory access */
1287 // ??? dap_ap_select(swjdp, swjdp_memoryap);
1289 if (count
&& buffer
) {
1292 retval
= mem_ap_read_buf_u32(swjdp
, buffer
, 4 * count
, address
);
1295 retval
= mem_ap_read_buf_u16(swjdp
, buffer
, 2 * count
, address
);
1298 retval
= mem_ap_read_buf_u8(swjdp
, buffer
, count
, address
);
1306 static int cortex_a8_write_memory(struct target
*target
, uint32_t address
,
1307 uint32_t size
, uint32_t count
, uint8_t *buffer
)
1309 struct armv7a_common
*armv7a
= target_to_armv7a(target
);
1310 struct swjdp_common
*swjdp
= &armv7a
->swjdp_info
;
1311 int retval
= ERROR_INVALID_ARGUMENTS
;
1313 // ??? dap_ap_select(swjdp, swjdp_memoryap);
1315 if (count
&& buffer
) {
1318 retval
= mem_ap_write_buf_u32(swjdp
, buffer
, 4 * count
, address
);
1321 retval
= mem_ap_write_buf_u16(swjdp
, buffer
, 2 * count
, address
);
1324 retval
= mem_ap_write_buf_u8(swjdp
, buffer
, count
, address
);
1329 /* REVISIT this op is generic ARMv7-A/R stuff */
1330 if (retval
== ERROR_OK
&& target
->state
== TARGET_HALTED
)
1332 struct arm_dpm
*dpm
= armv7a
->armv4_5_common
.dpm
;
1334 retval
= dpm
->prepare(dpm
);
1335 if (retval
!= ERROR_OK
)
1338 /* The Cache handling will NOT work with MMU active, the
1339 * wrong addresses will be invalidated!
1341 * For both ICache and DCache, walk all cache lines in the
1342 * address range. Cortex-A8 has fixed 64 byte line length.
1344 * REVISIT per ARMv7, these may trigger watchpoints ...
1347 /* invalidate I-Cache */
1348 if (armv7a
->armv4_5_mmu
.armv4_5_cache
.i_cache_enabled
)
1350 /* ICIMVAU - Invalidate Cache single entry
1352 * MCR p15, 0, r0, c7, c5, 1
1354 for (uint32_t cacheline
= address
;
1355 cacheline
< address
+ size
* count
;
1357 retval
= dpm
->instr_write_data_r0(dpm
,
1358 ARMV4_5_MCR(15, 0, 0, 7, 5, 1),
1363 /* invalidate D-Cache */
1364 if (armv7a
->armv4_5_mmu
.armv4_5_cache
.d_u_cache_enabled
)
1366 /* DCIMVAC - Invalidate data Cache line
1368 * MCR p15, 0, r0, c7, c6, 1
1370 for (uint32_t cacheline
= address
;
1371 cacheline
< address
+ size
* count
;
1373 retval
= dpm
->instr_write_data_r0(dpm
,
1374 ARMV4_5_MCR(15, 0, 0, 7, 6, 1),
1379 /* (void) */ dpm
->finish(dpm
);
1385 static int cortex_a8_bulk_write_memory(struct target
*target
, uint32_t address
,
1386 uint32_t count
, uint8_t *buffer
)
1388 return cortex_a8_write_memory(target
, address
, 4, count
, buffer
);
1392 static int cortex_a8_dcc_read(struct swjdp_common
*swjdp
, uint8_t *value
, uint8_t *ctrl
)
1397 mem_ap_read_buf_u16(swjdp
, (uint8_t*)&dcrdr
, 1, DCB_DCRDR
);
1398 *ctrl
= (uint8_t)dcrdr
;
1399 *value
= (uint8_t)(dcrdr
>> 8);
1401 LOG_DEBUG("data 0x%x ctrl 0x%x", *value
, *ctrl
);
1403 /* write ack back to software dcc register
1404 * signify we have read data */
1405 if (dcrdr
& (1 << 0))
1408 mem_ap_write_buf_u16(swjdp
, (uint8_t*)&dcrdr
, 1, DCB_DCRDR
);
1415 static int cortex_a8_handle_target_request(void *priv
)
1417 struct target
*target
= priv
;
1418 struct armv7a_common
*armv7a
= target_to_armv7a(target
);
1419 struct swjdp_common
*swjdp
= &armv7a
->swjdp_info
;
1421 if (!target_was_examined(target
))
1423 if (!target
->dbg_msg_enabled
)
1426 if (target
->state
== TARGET_RUNNING
)
1431 cortex_a8_dcc_read(swjdp
, &data
, &ctrl
);
1433 /* check if we have data */
1434 if (ctrl
& (1 << 0))
1438 /* we assume target is quick enough */
1440 cortex_a8_dcc_read(swjdp
, &data
, &ctrl
);
1441 request
|= (data
<< 8);
1442 cortex_a8_dcc_read(swjdp
, &data
, &ctrl
);
1443 request
|= (data
<< 16);
1444 cortex_a8_dcc_read(swjdp
, &data
, &ctrl
);
1445 request
|= (data
<< 24);
1446 target_request(target
, request
);
1454 * Cortex-A8 target information and configuration
1457 static int cortex_a8_examine_first(struct target
*target
)
1459 struct cortex_a8_common
*cortex_a8
= target_to_cortex_a8(target
);
1460 struct armv7a_common
*armv7a
= &cortex_a8
->armv7a_common
;
1461 struct swjdp_common
*swjdp
= &armv7a
->swjdp_info
;
1463 int retval
= ERROR_OK
;
1464 uint32_t didr
, ctypr
, ttypr
, cpuid
;
1468 /* Here we shall insert a proper ROM Table scan */
1469 armv7a
->debug_base
= OMAP3530_DEBUG_BASE
;
1471 /* We do one extra read to ensure DAP is configured,
1472 * we call ahbap_debugport_init(swjdp) instead
1474 ahbap_debugport_init(swjdp
);
1475 mem_ap_read_atomic_u32(swjdp
, armv7a
->debug_base
+ CPUDBG_CPUID
, &cpuid
);
1476 if ((retval
= mem_ap_read_atomic_u32(swjdp
,
1477 armv7a
->debug_base
+ CPUDBG_CPUID
, &cpuid
)) != ERROR_OK
)
1479 LOG_DEBUG("Examine failed");
1483 if ((retval
= mem_ap_read_atomic_u32(swjdp
,
1484 armv7a
->debug_base
+ CPUDBG_CTYPR
, &ctypr
)) != ERROR_OK
)
1486 LOG_DEBUG("Examine failed");
1490 if ((retval
= mem_ap_read_atomic_u32(swjdp
,
1491 armv7a
->debug_base
+ CPUDBG_TTYPR
, &ttypr
)) != ERROR_OK
)
1493 LOG_DEBUG("Examine failed");
1497 if ((retval
= mem_ap_read_atomic_u32(swjdp
,
1498 armv7a
->debug_base
+ CPUDBG_DIDR
, &didr
)) != ERROR_OK
)
1500 LOG_DEBUG("Examine failed");
1504 LOG_DEBUG("cpuid = 0x%08" PRIx32
, cpuid
);
1505 LOG_DEBUG("ctypr = 0x%08" PRIx32
, ctypr
);
1506 LOG_DEBUG("ttypr = 0x%08" PRIx32
, ttypr
);
1507 LOG_DEBUG("didr = 0x%08" PRIx32
, didr
);
1509 armv7a
->armv4_5_common
.core_type
= ARM_MODE_MON
;
1510 cortex_a8_dpm_setup(cortex_a8
, didr
);
1512 /* Setup Breakpoint Register Pairs */
1513 cortex_a8
->brp_num
= ((didr
>> 24) & 0x0F) + 1;
1514 cortex_a8
->brp_num_context
= ((didr
>> 20) & 0x0F) + 1;
1515 cortex_a8
->brp_num_available
= cortex_a8
->brp_num
;
1516 cortex_a8
->brp_list
= calloc(cortex_a8
->brp_num
, sizeof(struct cortex_a8_brp
));
1517 // cortex_a8->brb_enabled = ????;
1518 for (i
= 0; i
< cortex_a8
->brp_num
; i
++)
1520 cortex_a8
->brp_list
[i
].used
= 0;
1521 if (i
< (cortex_a8
->brp_num
-cortex_a8
->brp_num_context
))
1522 cortex_a8
->brp_list
[i
].type
= BRP_NORMAL
;
1524 cortex_a8
->brp_list
[i
].type
= BRP_CONTEXT
;
1525 cortex_a8
->brp_list
[i
].value
= 0;
1526 cortex_a8
->brp_list
[i
].control
= 0;
1527 cortex_a8
->brp_list
[i
].BRPn
= i
;
1530 /* Setup Watchpoint Register Pairs */
1531 cortex_a8
->wrp_num
= ((didr
>> 28) & 0x0F) + 1;
1532 cortex_a8
->wrp_num_available
= cortex_a8
->wrp_num
;
1533 cortex_a8
->wrp_list
= calloc(cortex_a8
->wrp_num
, sizeof(struct cortex_a8_wrp
));
1534 for (i
= 0; i
< cortex_a8
->wrp_num
; i
++)
1536 cortex_a8
->wrp_list
[i
].used
= 0;
1537 cortex_a8
->wrp_list
[i
].type
= 0;
1538 cortex_a8
->wrp_list
[i
].value
= 0;
1539 cortex_a8
->wrp_list
[i
].control
= 0;
1540 cortex_a8
->wrp_list
[i
].WRPn
= i
;
1542 LOG_DEBUG("Configured %i hw breakpoint pairs and %i hw watchpoint pairs",
1543 cortex_a8
->brp_num
, cortex_a8
->wrp_num
);
1545 target_set_examined(target
);
1549 static int cortex_a8_examine(struct target
*target
)
1551 int retval
= ERROR_OK
;
1553 /* don't re-probe hardware after each reset */
1554 if (!target_was_examined(target
))
1555 retval
= cortex_a8_examine_first(target
);
1557 /* Configure core debug access */
1558 if (retval
== ERROR_OK
)
1559 retval
= cortex_a8_init_debug_access(target
);
1565 * Cortex-A8 target creation and initialization
1568 static int cortex_a8_init_target(struct command_context
*cmd_ctx
,
1569 struct target
*target
)
1571 /* examine_first() does a bunch of this */
1575 static int cortex_a8_init_arch_info(struct target
*target
,
1576 struct cortex_a8_common
*cortex_a8
, struct jtag_tap
*tap
)
1578 struct armv7a_common
*armv7a
= &cortex_a8
->armv7a_common
;
1579 struct arm
*armv4_5
= &armv7a
->armv4_5_common
;
1580 struct swjdp_common
*swjdp
= &armv7a
->swjdp_info
;
1582 /* Setup struct cortex_a8_common */
1583 cortex_a8
->common_magic
= CORTEX_A8_COMMON_MAGIC
;
1584 armv4_5
->arch_info
= armv7a
;
1586 /* prepare JTAG information for the new target */
1587 cortex_a8
->jtag_info
.tap
= tap
;
1588 cortex_a8
->jtag_info
.scann_size
= 4;
1590 swjdp
->dp_select_value
= -1;
1591 swjdp
->ap_csw_value
= -1;
1592 swjdp
->ap_tar_value
= -1;
1593 swjdp
->jtag_info
= &cortex_a8
->jtag_info
;
1594 swjdp
->memaccess_tck
= 80;
1596 /* Number of bits for tar autoincrement, impl. dep. at least 10 */
1597 swjdp
->tar_autoincr_block
= (1 << 10);
1599 cortex_a8
->fast_reg_read
= 0;
1601 /* register arch-specific functions */
1602 armv7a
->examine_debug_reason
= NULL
;
1604 armv7a
->post_debug_entry
= cortex_a8_post_debug_entry
;
1606 armv7a
->pre_restore_context
= NULL
;
1607 armv7a
->post_restore_context
= NULL
;
1608 armv7a
->armv4_5_mmu
.armv4_5_cache
.ctype
= -1;
1609 // armv7a->armv4_5_mmu.get_ttb = armv7a_get_ttb;
1610 armv7a
->armv4_5_mmu
.read_memory
= cortex_a8_read_memory
;
1611 armv7a
->armv4_5_mmu
.write_memory
= cortex_a8_write_memory
;
1612 // armv7a->armv4_5_mmu.disable_mmu_caches = armv7a_disable_mmu_caches;
1613 // armv7a->armv4_5_mmu.enable_mmu_caches = armv7a_enable_mmu_caches;
1614 armv7a
->armv4_5_mmu
.has_tiny_pages
= 1;
1615 armv7a
->armv4_5_mmu
.mmu_enabled
= 0;
1618 // arm7_9->handle_target_request = cortex_a8_handle_target_request;
1620 /* REVISIT v7a setup should be in a v7a-specific routine */
1621 armv4_5_init_arch_info(target
, armv4_5
);
1622 armv7a
->common_magic
= ARMV7_COMMON_MAGIC
;
1624 target_register_timer_callback(cortex_a8_handle_target_request
, 1, 1, target
);
1629 static int cortex_a8_target_create(struct target
*target
, Jim_Interp
*interp
)
1631 struct cortex_a8_common
*cortex_a8
= calloc(1, sizeof(struct cortex_a8_common
));
1633 cortex_a8_init_arch_info(target
, cortex_a8
, target
->tap
);
1638 COMMAND_HANDLER(cortex_a8_handle_cache_info_command
)
1640 struct target
*target
= get_current_target(CMD_CTX
);
1641 struct armv7a_common
*armv7a
= target_to_armv7a(target
);
1643 return armv4_5_handle_cache_info_command(CMD_CTX
,
1644 &armv7a
->armv4_5_mmu
.armv4_5_cache
);
1648 COMMAND_HANDLER(cortex_a8_handle_dbginit_command
)
1650 struct target
*target
= get_current_target(CMD_CTX
);
1652 cortex_a8_init_debug_access(target
);
1657 static const struct command_registration cortex_a8_exec_command_handlers
[] = {
1659 .name
= "cache_info",
1660 .handler
= &cortex_a8_handle_cache_info_command
,
1661 .mode
= COMMAND_EXEC
,
1662 .help
= "display information about target caches",
1666 .handler
= &cortex_a8_handle_dbginit_command
,
1667 .mode
= COMMAND_EXEC
,
1668 .help
= "Initialize core debug",
1670 COMMAND_REGISTRATION_DONE
1672 static const struct command_registration cortex_a8_command_handlers
[] = {
1674 .chain
= arm_command_handlers
,
1677 .chain
= armv7a_command_handlers
,
1680 .name
= "cortex_a8",
1681 .mode
= COMMAND_ANY
,
1682 .help
= "Cortex-A8 command group",
1683 .chain
= cortex_a8_exec_command_handlers
,
1685 COMMAND_REGISTRATION_DONE
1688 struct target_type cortexa8_target
= {
1689 .name
= "cortex_a8",
1691 .poll
= cortex_a8_poll
,
1692 .arch_state
= armv7a_arch_state
,
1694 .target_request_data
= NULL
,
1696 .halt
= cortex_a8_halt
,
1697 .resume
= cortex_a8_resume
,
1698 .step
= cortex_a8_step
,
1700 .assert_reset
= cortex_a8_assert_reset
,
1701 .deassert_reset
= cortex_a8_deassert_reset
,
1702 .soft_reset_halt
= NULL
,
1704 .get_gdb_reg_list
= armv4_5_get_gdb_reg_list
,
1706 .read_memory
= cortex_a8_read_memory
,
1707 .write_memory
= cortex_a8_write_memory
,
1708 .bulk_write_memory
= cortex_a8_bulk_write_memory
,
1710 .checksum_memory
= arm_checksum_memory
,
1711 .blank_check_memory
= arm_blank_check_memory
,
1713 .run_algorithm
= armv4_5_run_algorithm
,
1715 .add_breakpoint
= cortex_a8_add_breakpoint
,
1716 .remove_breakpoint
= cortex_a8_remove_breakpoint
,
1717 .add_watchpoint
= NULL
,
1718 .remove_watchpoint
= NULL
,
1720 .commands
= cortex_a8_command_handlers
,
1721 .target_create
= cortex_a8_target_create
,
1722 .init_target
= cortex_a8_init_target
,
1723 .examine
= cortex_a8_examine
,
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