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_dpm_setup(struct cortex_a8_common
*a8
, uint32_t didr
)
465 struct arm_dpm
*dpm
= &a8
->armv7a_common
.dpm
;
467 dpm
->arm
= &a8
->armv7a_common
.armv4_5_common
;
470 dpm
->prepare
= cortex_a8_dpm_prepare
;
471 dpm
->finish
= cortex_a8_dpm_finish
;
473 dpm
->instr_write_data_dcc
= cortex_a8_instr_write_data_dcc
;
474 dpm
->instr_write_data_r0
= cortex_a8_instr_write_data_r0
;
475 dpm
->instr_cpsr_sync
= cortex_a8_instr_cpsr_sync
;
477 dpm
->instr_read_data_dcc
= cortex_a8_instr_read_data_dcc
;
478 dpm
->instr_read_data_r0
= cortex_a8_instr_read_data_r0
;
480 return arm_dpm_setup(dpm
);
485 * Cortex-A8 Run control
488 static int cortex_a8_poll(struct target
*target
)
490 int retval
= ERROR_OK
;
492 struct cortex_a8_common
*cortex_a8
= target_to_cortex_a8(target
);
493 struct armv7a_common
*armv7a
= &cortex_a8
->armv7a_common
;
494 struct swjdp_common
*swjdp
= &armv7a
->swjdp_info
;
495 enum target_state prev_target_state
= target
->state
;
496 uint8_t saved_apsel
= dap_ap_get_select(swjdp
);
498 dap_ap_select(swjdp
, swjdp_debugap
);
499 retval
= mem_ap_read_atomic_u32(swjdp
,
500 armv7a
->debug_base
+ CPUDBG_DSCR
, &dscr
);
501 if (retval
!= ERROR_OK
)
503 dap_ap_select(swjdp
, saved_apsel
);
506 cortex_a8
->cpudbg_dscr
= dscr
;
508 if ((dscr
& 0x3) == 0x3)
510 if (prev_target_state
!= TARGET_HALTED
)
512 /* We have a halting debug event */
513 LOG_DEBUG("Target halted");
514 target
->state
= TARGET_HALTED
;
515 if ((prev_target_state
== TARGET_RUNNING
)
516 || (prev_target_state
== TARGET_RESET
))
518 retval
= cortex_a8_debug_entry(target
);
519 if (retval
!= ERROR_OK
)
522 target_call_event_callbacks(target
,
523 TARGET_EVENT_HALTED
);
525 if (prev_target_state
== TARGET_DEBUG_RUNNING
)
529 retval
= cortex_a8_debug_entry(target
);
530 if (retval
!= ERROR_OK
)
533 target_call_event_callbacks(target
,
534 TARGET_EVENT_DEBUG_HALTED
);
538 else if ((dscr
& 0x3) == 0x2)
540 target
->state
= TARGET_RUNNING
;
544 LOG_DEBUG("Unknown target state dscr = 0x%08" PRIx32
, dscr
);
545 target
->state
= TARGET_UNKNOWN
;
548 dap_ap_select(swjdp
, saved_apsel
);
553 static int cortex_a8_halt(struct target
*target
)
555 int retval
= ERROR_OK
;
557 struct armv7a_common
*armv7a
= target_to_armv7a(target
);
558 struct swjdp_common
*swjdp
= &armv7a
->swjdp_info
;
559 uint8_t saved_apsel
= dap_ap_get_select(swjdp
);
560 dap_ap_select(swjdp
, swjdp_debugap
);
563 * Tell the core to be halted by writing DRCR with 0x1
564 * and then wait for the core to be halted.
566 retval
= mem_ap_write_atomic_u32(swjdp
,
567 armv7a
->debug_base
+ CPUDBG_DRCR
, 0x1);
570 * enter halting debug mode
572 mem_ap_read_atomic_u32(swjdp
, armv7a
->debug_base
+ CPUDBG_DSCR
, &dscr
);
573 retval
= mem_ap_write_atomic_u32(swjdp
,
574 armv7a
->debug_base
+ CPUDBG_DSCR
, dscr
| (1 << DSCR_HALT_DBG_MODE
));
576 if (retval
!= ERROR_OK
)
580 mem_ap_read_atomic_u32(swjdp
,
581 armv7a
->debug_base
+ CPUDBG_DSCR
, &dscr
);
582 } while ((dscr
& (1 << DSCR_CORE_HALTED
)) == 0);
584 target
->debug_reason
= DBG_REASON_DBGRQ
;
587 dap_ap_select(swjdp
, saved_apsel
);
591 static int cortex_a8_resume(struct target
*target
, int current
,
592 uint32_t address
, int handle_breakpoints
, int debug_execution
)
594 struct armv7a_common
*armv7a
= target_to_armv7a(target
);
595 struct arm
*armv4_5
= &armv7a
->armv4_5_common
;
596 struct swjdp_common
*swjdp
= &armv7a
->swjdp_info
;
598 // struct breakpoint *breakpoint = NULL;
599 uint32_t resume_pc
, dscr
;
601 uint8_t saved_apsel
= dap_ap_get_select(swjdp
);
602 dap_ap_select(swjdp
, swjdp_debugap
);
604 if (!debug_execution
)
605 target_free_all_working_areas(target
);
610 /* Disable interrupts */
611 /* We disable interrupts in the PRIMASK register instead of
612 * masking with C_MASKINTS,
613 * This is probably the same issue as Cortex-M3 Errata 377493:
614 * C_MASKINTS in parallel with disabled interrupts can cause
615 * local faults to not be taken. */
616 buf_set_u32(armv7m
->core_cache
->reg_list
[ARMV7M_PRIMASK
].value
, 0, 32, 1);
617 armv7m
->core_cache
->reg_list
[ARMV7M_PRIMASK
].dirty
= 1;
618 armv7m
->core_cache
->reg_list
[ARMV7M_PRIMASK
].valid
= 1;
620 /* Make sure we are in Thumb mode */
621 buf_set_u32(armv7m
->core_cache
->reg_list
[ARMV7M_xPSR
].value
, 0, 32,
622 buf_get_u32(armv7m
->core_cache
->reg_list
[ARMV7M_xPSR
].value
, 0, 32) | (1 << 24));
623 armv7m
->core_cache
->reg_list
[ARMV7M_xPSR
].dirty
= 1;
624 armv7m
->core_cache
->reg_list
[ARMV7M_xPSR
].valid
= 1;
628 /* current = 1: continue on current pc, otherwise continue at <address> */
629 resume_pc
= buf_get_u32(
630 armv4_5
->core_cache
->reg_list
[15].value
,
635 /* Make sure that the Armv7 gdb thumb fixups does not
636 * kill the return address
638 switch (armv4_5
->core_state
)
640 case ARMV4_5_STATE_ARM
:
641 resume_pc
&= 0xFFFFFFFC;
643 case ARMV4_5_STATE_THUMB
:
644 case ARM_STATE_THUMB_EE
:
645 /* When the return address is loaded into PC
646 * bit 0 must be 1 to stay in Thumb state
650 case ARMV4_5_STATE_JAZELLE
:
651 LOG_ERROR("How do I resume into Jazelle state??");
654 LOG_DEBUG("resume pc = 0x%08" PRIx32
, resume_pc
);
655 buf_set_u32(armv4_5
->core_cache
->reg_list
[15].value
,
657 armv4_5
->core_cache
->reg_list
[15].dirty
= 1;
658 armv4_5
->core_cache
->reg_list
[15].valid
= 1;
660 cortex_a8_restore_context(target
, handle_breakpoints
);
663 /* the front-end may request us not to handle breakpoints */
664 if (handle_breakpoints
)
666 /* Single step past breakpoint at current address */
667 if ((breakpoint
= breakpoint_find(target
, resume_pc
)))
669 LOG_DEBUG("unset breakpoint at 0x%8.8x", breakpoint
->address
);
670 cortex_m3_unset_breakpoint(target
, breakpoint
);
671 cortex_m3_single_step_core(target
);
672 cortex_m3_set_breakpoint(target
, breakpoint
);
677 /* Restart core and wait for it to be started */
678 mem_ap_write_atomic_u32(swjdp
, armv7a
->debug_base
+ CPUDBG_DRCR
, 0x2);
681 mem_ap_read_atomic_u32(swjdp
,
682 armv7a
->debug_base
+ CPUDBG_DSCR
, &dscr
);
683 } while ((dscr
& (1 << DSCR_CORE_RESTARTED
)) == 0);
685 target
->debug_reason
= DBG_REASON_NOTHALTED
;
686 target
->state
= TARGET_RUNNING
;
688 /* registers are now invalid */
689 register_cache_invalidate(armv4_5
->core_cache
);
691 if (!debug_execution
)
693 target
->state
= TARGET_RUNNING
;
694 target_call_event_callbacks(target
, TARGET_EVENT_RESUMED
);
695 LOG_DEBUG("target resumed at 0x%" PRIx32
, resume_pc
);
699 target
->state
= TARGET_DEBUG_RUNNING
;
700 target_call_event_callbacks(target
, TARGET_EVENT_DEBUG_RESUMED
);
701 LOG_DEBUG("target debug resumed at 0x%" PRIx32
, resume_pc
);
704 dap_ap_select(swjdp
, saved_apsel
);
709 static int cortex_a8_debug_entry(struct target
*target
)
712 uint32_t regfile
[16], pc
, cpsr
, dscr
;
713 int retval
= ERROR_OK
;
714 struct working_area
*regfile_working_area
= NULL
;
715 struct cortex_a8_common
*cortex_a8
= target_to_cortex_a8(target
);
716 struct armv7a_common
*armv7a
= target_to_armv7a(target
);
717 struct arm
*armv4_5
= &armv7a
->armv4_5_common
;
718 struct swjdp_common
*swjdp
= &armv7a
->swjdp_info
;
721 LOG_DEBUG("dscr = 0x%08" PRIx32
, cortex_a8
->cpudbg_dscr
);
723 /* Enable the ITR execution once we are in debug mode */
724 mem_ap_read_atomic_u32(swjdp
,
725 armv7a
->debug_base
+ CPUDBG_DSCR
, &dscr
);
727 /* REVISIT see A8 TRM 12.11.4 steps 2..3 -- make sure that any
728 * imprecise data aborts get discarded by issuing a Data
729 * Synchronization Barrier: ARMV4_5_MCR(15, 0, 0, 7, 10, 4).
732 dscr
|= (1 << DSCR_EXT_INT_EN
);
733 retval
= mem_ap_write_atomic_u32(swjdp
,
734 armv7a
->debug_base
+ CPUDBG_DSCR
, dscr
);
736 /* Examine debug reason */
737 switch ((cortex_a8
->cpudbg_dscr
>> 2)&0xF)
739 case 0: /* DRCR[0] write */
741 target
->debug_reason
= DBG_REASON_DBGRQ
;
743 case 1: /* HW breakpoint */
744 case 3: /* SW BKPT */
745 case 5: /* vector catch */
746 target
->debug_reason
= DBG_REASON_BREAKPOINT
;
748 case 10: /* precise watchpoint */
749 target
->debug_reason
= DBG_REASON_WATCHPOINT
;
750 /* REVISIT could collect WFAR later, to see just
751 * which instruction triggered the watchpoint.
755 target
->debug_reason
= DBG_REASON_UNDEFINED
;
759 /* REVISIT fast_reg_read is never set ... */
761 /* Examine target state and mode */
762 if (cortex_a8
->fast_reg_read
)
763 target_alloc_working_area(target
, 64, ®file_working_area
);
765 /* First load register acessible through core debug port*/
766 if (!regfile_working_area
)
768 retval
= arm_dpm_read_current_registers(&armv7a
->dpm
);
772 dap_ap_select(swjdp
, swjdp_memoryap
);
773 cortex_a8_read_regs_through_mem(target
,
774 regfile_working_area
->address
, regfile
);
775 dap_ap_select(swjdp
, swjdp_memoryap
);
776 target_free_working_area(target
, regfile_working_area
);
778 /* read Current PSR */
779 cortex_a8_dap_read_coreregister_u32(target
, &cpsr
, 16);
781 dap_ap_select(swjdp
, swjdp_debugap
);
782 LOG_DEBUG("cpsr: %8.8" PRIx32
, cpsr
);
784 arm_set_cpsr(armv4_5
, cpsr
);
787 for (i
= 0; i
<= ARM_PC
; i
++)
789 reg
= arm_reg_current(armv4_5
, i
);
791 buf_set_u32(reg
->value
, 0, 32, regfile
[i
]);
796 /* Fixup PC Resume Address */
799 // T bit set for Thumb or ThumbEE state
800 regfile
[ARM_PC
] -= 4;
805 regfile
[ARM_PC
] -= 8;
808 reg
= armv4_5
->core_cache
->reg_list
+ 15;
809 buf_set_u32(reg
->value
, 0, 32, regfile
[ARM_PC
]);
810 reg
->dirty
= reg
->valid
;
814 /* TODO, Move this */
815 uint32_t cp15_control_register
, cp15_cacr
, cp15_nacr
;
816 cortex_a8_read_cp(target
, &cp15_control_register
, 15, 0, 1, 0, 0);
817 LOG_DEBUG("cp15_control_register = 0x%08x", cp15_control_register
);
819 cortex_a8_read_cp(target
, &cp15_cacr
, 15, 0, 1, 0, 2);
820 LOG_DEBUG("cp15 Coprocessor Access Control Register = 0x%08x", cp15_cacr
);
822 cortex_a8_read_cp(target
, &cp15_nacr
, 15, 0, 1, 1, 2);
823 LOG_DEBUG("cp15 Nonsecure Access Control Register = 0x%08x", cp15_nacr
);
826 /* Are we in an exception handler */
827 // armv4_5->exception_number = 0;
828 if (armv7a
->post_debug_entry
)
829 armv7a
->post_debug_entry(target
);
837 static void cortex_a8_post_debug_entry(struct target
*target
)
839 struct cortex_a8_common
*cortex_a8
= target_to_cortex_a8(target
);
840 struct armv7a_common
*armv7a
= &cortex_a8
->armv7a_common
;
843 /* MRC p15,0,<Rt>,c1,c0,0 ; Read CP15 System Control Register */
844 retval
= armv7a
->armv4_5_common
.mrc(target
, 15,
847 &cortex_a8
->cp15_control_reg
);
848 LOG_DEBUG("cp15_control_reg: %8.8" PRIx32
, cortex_a8
->cp15_control_reg
);
850 if (armv7a
->armv4_5_mmu
.armv4_5_cache
.ctype
== -1)
852 uint32_t cache_type_reg
;
854 /* MRC p15,0,<Rt>,c0,c0,1 ; Read CP15 Cache Type Register */
855 retval
= armv7a
->armv4_5_common
.mrc(target
, 15,
859 LOG_DEBUG("cp15 cache type: %8.8x", (unsigned) cache_type_reg
);
861 /* FIXME the armv4_4 cache info DOES NOT APPLY to Cortex-A8 */
862 armv4_5_identify_cache(cache_type_reg
,
863 &armv7a
->armv4_5_mmu
.armv4_5_cache
);
866 armv7a
->armv4_5_mmu
.mmu_enabled
=
867 (cortex_a8
->cp15_control_reg
& 0x1U
) ? 1 : 0;
868 armv7a
->armv4_5_mmu
.armv4_5_cache
.d_u_cache_enabled
=
869 (cortex_a8
->cp15_control_reg
& 0x4U
) ? 1 : 0;
870 armv7a
->armv4_5_mmu
.armv4_5_cache
.i_cache_enabled
=
871 (cortex_a8
->cp15_control_reg
& 0x1000U
) ? 1 : 0;
876 static int cortex_a8_step(struct target
*target
, int current
, uint32_t address
,
877 int handle_breakpoints
)
879 struct armv7a_common
*armv7a
= target_to_armv7a(target
);
880 struct arm
*armv4_5
= &armv7a
->armv4_5_common
;
881 struct breakpoint
*breakpoint
= NULL
;
882 struct breakpoint stepbreakpoint
;
887 if (target
->state
!= TARGET_HALTED
)
889 LOG_WARNING("target not halted");
890 return ERROR_TARGET_NOT_HALTED
;
893 /* current = 1: continue on current pc, otherwise continue at <address> */
894 r
= armv4_5
->core_cache
->reg_list
+ 15;
897 buf_set_u32(r
->value
, 0, 32, address
);
901 address
= buf_get_u32(r
->value
, 0, 32);
904 /* The front-end may request us not to handle breakpoints.
905 * But since Cortex-A8 uses breakpoint for single step,
906 * we MUST handle breakpoints.
908 handle_breakpoints
= 1;
909 if (handle_breakpoints
) {
910 breakpoint
= breakpoint_find(target
, address
);
912 cortex_a8_unset_breakpoint(target
, breakpoint
);
915 /* Setup single step breakpoint */
916 stepbreakpoint
.address
= address
;
917 stepbreakpoint
.length
= (armv4_5
->core_state
== ARMV4_5_STATE_THUMB
)
919 stepbreakpoint
.type
= BKPT_HARD
;
920 stepbreakpoint
.set
= 0;
922 /* Break on IVA mismatch */
923 cortex_a8_set_breakpoint(target
, &stepbreakpoint
, 0x04);
925 target
->debug_reason
= DBG_REASON_SINGLESTEP
;
927 cortex_a8_resume(target
, 1, address
, 0, 0);
929 while (target
->state
!= TARGET_HALTED
)
931 cortex_a8_poll(target
);
934 LOG_WARNING("timeout waiting for target halt");
939 cortex_a8_unset_breakpoint(target
, &stepbreakpoint
);
940 if (timeout
> 0) target
->debug_reason
= DBG_REASON_BREAKPOINT
;
943 cortex_a8_set_breakpoint(target
, breakpoint
, 0);
945 if (target
->state
!= TARGET_HALTED
)
946 LOG_DEBUG("target stepped");
951 static int cortex_a8_restore_context(struct target
*target
, bool bpwp
)
953 struct armv7a_common
*armv7a
= target_to_armv7a(target
);
957 if (armv7a
->pre_restore_context
)
958 armv7a
->pre_restore_context(target
);
960 arm_dpm_write_dirty_registers(&armv7a
->dpm
, bpwp
);
962 if (armv7a
->post_restore_context
)
963 armv7a
->post_restore_context(target
);
970 * Cortex-A8 Breakpoint and watchpoint fuctions
973 /* Setup hardware Breakpoint Register Pair */
974 static int cortex_a8_set_breakpoint(struct target
*target
,
975 struct breakpoint
*breakpoint
, uint8_t matchmode
)
980 uint8_t byte_addr_select
= 0x0F;
981 struct cortex_a8_common
*cortex_a8
= target_to_cortex_a8(target
);
982 struct armv7a_common
*armv7a
= &cortex_a8
->armv7a_common
;
983 struct cortex_a8_brp
* brp_list
= cortex_a8
->brp_list
;
987 LOG_WARNING("breakpoint already set");
991 if (breakpoint
->type
== BKPT_HARD
)
993 while (brp_list
[brp_i
].used
&& (brp_i
< cortex_a8
->brp_num
))
995 if (brp_i
>= cortex_a8
->brp_num
)
997 LOG_ERROR("ERROR Can not find free Breakpoint Register Pair");
1000 breakpoint
->set
= brp_i
+ 1;
1001 if (breakpoint
->length
== 2)
1003 byte_addr_select
= (3 << (breakpoint
->address
& 0x02));
1005 control
= ((matchmode
& 0x7) << 20)
1006 | (byte_addr_select
<< 5)
1008 brp_list
[brp_i
].used
= 1;
1009 brp_list
[brp_i
].value
= (breakpoint
->address
& 0xFFFFFFFC);
1010 brp_list
[brp_i
].control
= control
;
1011 cortex_a8_dap_write_memap_register_u32(target
, armv7a
->debug_base
1012 + CPUDBG_BVR_BASE
+ 4 * brp_list
[brp_i
].BRPn
,
1013 brp_list
[brp_i
].value
);
1014 cortex_a8_dap_write_memap_register_u32(target
, armv7a
->debug_base
1015 + CPUDBG_BCR_BASE
+ 4 * brp_list
[brp_i
].BRPn
,
1016 brp_list
[brp_i
].control
);
1017 LOG_DEBUG("brp %i control 0x%0" PRIx32
" value 0x%0" PRIx32
, brp_i
,
1018 brp_list
[brp_i
].control
,
1019 brp_list
[brp_i
].value
);
1021 else if (breakpoint
->type
== BKPT_SOFT
)
1024 if (breakpoint
->length
== 2)
1026 buf_set_u32(code
, 0, 32, ARMV5_T_BKPT(0x11));
1030 buf_set_u32(code
, 0, 32, ARMV5_BKPT(0x11));
1032 retval
= target
->type
->read_memory(target
,
1033 breakpoint
->address
& 0xFFFFFFFE,
1034 breakpoint
->length
, 1,
1035 breakpoint
->orig_instr
);
1036 if (retval
!= ERROR_OK
)
1038 retval
= target
->type
->write_memory(target
,
1039 breakpoint
->address
& 0xFFFFFFFE,
1040 breakpoint
->length
, 1, code
);
1041 if (retval
!= ERROR_OK
)
1043 breakpoint
->set
= 0x11; /* Any nice value but 0 */
1049 static int cortex_a8_unset_breakpoint(struct target
*target
, struct breakpoint
*breakpoint
)
1052 struct cortex_a8_common
*cortex_a8
= target_to_cortex_a8(target
);
1053 struct armv7a_common
*armv7a
= &cortex_a8
->armv7a_common
;
1054 struct cortex_a8_brp
* brp_list
= cortex_a8
->brp_list
;
1056 if (!breakpoint
->set
)
1058 LOG_WARNING("breakpoint not set");
1062 if (breakpoint
->type
== BKPT_HARD
)
1064 int brp_i
= breakpoint
->set
- 1;
1065 if ((brp_i
< 0) || (brp_i
>= cortex_a8
->brp_num
))
1067 LOG_DEBUG("Invalid BRP number in breakpoint");
1070 LOG_DEBUG("rbp %i control 0x%0" PRIx32
" value 0x%0" PRIx32
, brp_i
,
1071 brp_list
[brp_i
].control
, brp_list
[brp_i
].value
);
1072 brp_list
[brp_i
].used
= 0;
1073 brp_list
[brp_i
].value
= 0;
1074 brp_list
[brp_i
].control
= 0;
1075 cortex_a8_dap_write_memap_register_u32(target
, armv7a
->debug_base
1076 + CPUDBG_BCR_BASE
+ 4 * brp_list
[brp_i
].BRPn
,
1077 brp_list
[brp_i
].control
);
1078 cortex_a8_dap_write_memap_register_u32(target
, armv7a
->debug_base
1079 + CPUDBG_BVR_BASE
+ 4 * brp_list
[brp_i
].BRPn
,
1080 brp_list
[brp_i
].value
);
1084 /* restore original instruction (kept in target endianness) */
1085 if (breakpoint
->length
== 4)
1087 retval
= target
->type
->write_memory(target
,
1088 breakpoint
->address
& 0xFFFFFFFE,
1089 4, 1, breakpoint
->orig_instr
);
1090 if (retval
!= ERROR_OK
)
1095 retval
= target
->type
->write_memory(target
,
1096 breakpoint
->address
& 0xFFFFFFFE,
1097 2, 1, breakpoint
->orig_instr
);
1098 if (retval
!= ERROR_OK
)
1102 breakpoint
->set
= 0;
1107 static int cortex_a8_add_breakpoint(struct target
*target
,
1108 struct breakpoint
*breakpoint
)
1110 struct cortex_a8_common
*cortex_a8
= target_to_cortex_a8(target
);
1112 if ((breakpoint
->type
== BKPT_HARD
) && (cortex_a8
->brp_num_available
< 1))
1114 LOG_INFO("no hardware breakpoint available");
1115 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
1118 if (breakpoint
->type
== BKPT_HARD
)
1119 cortex_a8
->brp_num_available
--;
1120 cortex_a8_set_breakpoint(target
, breakpoint
, 0x00); /* Exact match */
1125 static int cortex_a8_remove_breakpoint(struct target
*target
, struct breakpoint
*breakpoint
)
1127 struct cortex_a8_common
*cortex_a8
= target_to_cortex_a8(target
);
1130 /* It is perfectly possible to remove brakpoints while the taget is running */
1131 if (target
->state
!= TARGET_HALTED
)
1133 LOG_WARNING("target not halted");
1134 return ERROR_TARGET_NOT_HALTED
;
1138 if (breakpoint
->set
)
1140 cortex_a8_unset_breakpoint(target
, breakpoint
);
1141 if (breakpoint
->type
== BKPT_HARD
)
1142 cortex_a8
->brp_num_available
++ ;
1152 * Cortex-A8 Reset fuctions
1155 static int cortex_a8_assert_reset(struct target
*target
)
1157 struct armv7a_common
*armv7a
= target_to_armv7a(target
);
1161 /* FIXME when halt is requested, make it work somehow... */
1163 /* Issue some kind of warm reset. */
1164 if (target_has_event_action(target
, TARGET_EVENT_RESET_ASSERT
)) {
1165 target_handle_event(target
, TARGET_EVENT_RESET_ASSERT
);
1166 } else if (jtag_get_reset_config() & RESET_HAS_SRST
) {
1167 /* REVISIT handle "pulls" cases, if there's
1168 * hardware that needs them to work.
1170 jtag_add_reset(0, 1);
1172 LOG_ERROR("%s: how to reset?", target_name(target
));
1176 /* registers are now invalid */
1177 register_cache_invalidate(armv7a
->armv4_5_common
.core_cache
);
1179 target
->state
= TARGET_RESET
;
1184 static int cortex_a8_deassert_reset(struct target
*target
)
1190 /* be certain SRST is off */
1191 jtag_add_reset(0, 0);
1193 retval
= cortex_a8_poll(target
);
1195 if (target
->reset_halt
) {
1196 if (target
->state
!= TARGET_HALTED
) {
1197 LOG_WARNING("%s: ran after reset and before halt ...",
1198 target_name(target
));
1199 if ((retval
= target_halt(target
)) != ERROR_OK
)
1208 * Cortex-A8 Memory access
1210 * This is same Cortex M3 but we must also use the correct
1211 * ap number for every access.
1214 static int cortex_a8_read_memory(struct target
*target
, uint32_t address
,
1215 uint32_t size
, uint32_t count
, uint8_t *buffer
)
1217 struct armv7a_common
*armv7a
= target_to_armv7a(target
);
1218 struct swjdp_common
*swjdp
= &armv7a
->swjdp_info
;
1219 int retval
= ERROR_INVALID_ARGUMENTS
;
1221 /* cortex_a8 handles unaligned memory access */
1223 // ??? dap_ap_select(swjdp, swjdp_memoryap);
1225 if (count
&& buffer
) {
1228 retval
= mem_ap_read_buf_u32(swjdp
, buffer
, 4 * count
, address
);
1231 retval
= mem_ap_read_buf_u16(swjdp
, buffer
, 2 * count
, address
);
1234 retval
= mem_ap_read_buf_u8(swjdp
, buffer
, count
, address
);
1242 static int cortex_a8_write_memory(struct target
*target
, uint32_t address
,
1243 uint32_t size
, uint32_t count
, uint8_t *buffer
)
1245 struct armv7a_common
*armv7a
= target_to_armv7a(target
);
1246 struct swjdp_common
*swjdp
= &armv7a
->swjdp_info
;
1247 int retval
= ERROR_INVALID_ARGUMENTS
;
1249 // ??? dap_ap_select(swjdp, swjdp_memoryap);
1251 if (count
&& buffer
) {
1254 retval
= mem_ap_write_buf_u32(swjdp
, buffer
, 4 * count
, address
);
1257 retval
= mem_ap_write_buf_u16(swjdp
, buffer
, 2 * count
, address
);
1260 retval
= mem_ap_write_buf_u8(swjdp
, buffer
, count
, address
);
1265 /* REVISIT this op is generic ARMv7-A/R stuff */
1266 if (retval
== ERROR_OK
&& target
->state
== TARGET_HALTED
)
1268 struct arm_dpm
*dpm
= armv7a
->armv4_5_common
.dpm
;
1270 retval
= dpm
->prepare(dpm
);
1271 if (retval
!= ERROR_OK
)
1274 /* The Cache handling will NOT work with MMU active, the
1275 * wrong addresses will be invalidated!
1277 * For both ICache and DCache, walk all cache lines in the
1278 * address range. Cortex-A8 has fixed 64 byte line length.
1281 /* invalidate I-Cache */
1282 if (armv7a
->armv4_5_mmu
.armv4_5_cache
.i_cache_enabled
)
1284 /* ICIMVAU - Invalidate Cache single entry
1286 * MCR p15, 0, r0, c7, c5, 1
1288 for (uint32_t cacheline
= address
;
1289 cacheline
< address
+ size
* count
;
1291 retval
= dpm
->instr_write_data_r0(dpm
,
1292 ARMV4_5_MCR(15, 0, 0, 7, 5, 1),
1297 /* invalidate D-Cache */
1298 if (armv7a
->armv4_5_mmu
.armv4_5_cache
.d_u_cache_enabled
)
1300 /* DCIMVAC - Invalidate data Cache line
1302 * MCR p15, 0, r0, c7, c6, 1
1304 for (uint32_t cacheline
= address
;
1305 cacheline
< address
+ size
* count
;
1307 retval
= dpm
->instr_write_data_r0(dpm
,
1308 ARMV4_5_MCR(15, 0, 0, 7, 6, 1),
1313 /* (void) */ dpm
->finish(dpm
);
1319 static int cortex_a8_bulk_write_memory(struct target
*target
, uint32_t address
,
1320 uint32_t count
, uint8_t *buffer
)
1322 return cortex_a8_write_memory(target
, address
, 4, count
, buffer
);
1326 static int cortex_a8_dcc_read(struct swjdp_common
*swjdp
, uint8_t *value
, uint8_t *ctrl
)
1331 mem_ap_read_buf_u16(swjdp
, (uint8_t*)&dcrdr
, 1, DCB_DCRDR
);
1332 *ctrl
= (uint8_t)dcrdr
;
1333 *value
= (uint8_t)(dcrdr
>> 8);
1335 LOG_DEBUG("data 0x%x ctrl 0x%x", *value
, *ctrl
);
1337 /* write ack back to software dcc register
1338 * signify we have read data */
1339 if (dcrdr
& (1 << 0))
1342 mem_ap_write_buf_u16(swjdp
, (uint8_t*)&dcrdr
, 1, DCB_DCRDR
);
1349 static int cortex_a8_handle_target_request(void *priv
)
1351 struct target
*target
= priv
;
1352 struct armv7a_common
*armv7a
= target_to_armv7a(target
);
1353 struct swjdp_common
*swjdp
= &armv7a
->swjdp_info
;
1355 if (!target_was_examined(target
))
1357 if (!target
->dbg_msg_enabled
)
1360 if (target
->state
== TARGET_RUNNING
)
1365 cortex_a8_dcc_read(swjdp
, &data
, &ctrl
);
1367 /* check if we have data */
1368 if (ctrl
& (1 << 0))
1372 /* we assume target is quick enough */
1374 cortex_a8_dcc_read(swjdp
, &data
, &ctrl
);
1375 request
|= (data
<< 8);
1376 cortex_a8_dcc_read(swjdp
, &data
, &ctrl
);
1377 request
|= (data
<< 16);
1378 cortex_a8_dcc_read(swjdp
, &data
, &ctrl
);
1379 request
|= (data
<< 24);
1380 target_request(target
, request
);
1388 * Cortex-A8 target information and configuration
1391 static int cortex_a8_examine_first(struct target
*target
)
1393 struct cortex_a8_common
*cortex_a8
= target_to_cortex_a8(target
);
1394 struct armv7a_common
*armv7a
= &cortex_a8
->armv7a_common
;
1395 struct swjdp_common
*swjdp
= &armv7a
->swjdp_info
;
1397 int retval
= ERROR_OK
;
1398 uint32_t didr
, ctypr
, ttypr
, cpuid
;
1402 /* Here we shall insert a proper ROM Table scan */
1403 armv7a
->debug_base
= OMAP3530_DEBUG_BASE
;
1405 /* We do one extra read to ensure DAP is configured,
1406 * we call ahbap_debugport_init(swjdp) instead
1408 ahbap_debugport_init(swjdp
);
1409 mem_ap_read_atomic_u32(swjdp
, armv7a
->debug_base
+ CPUDBG_CPUID
, &cpuid
);
1410 if ((retval
= mem_ap_read_atomic_u32(swjdp
,
1411 armv7a
->debug_base
+ CPUDBG_CPUID
, &cpuid
)) != ERROR_OK
)
1413 LOG_DEBUG("Examine failed");
1417 if ((retval
= mem_ap_read_atomic_u32(swjdp
,
1418 armv7a
->debug_base
+ CPUDBG_CTYPR
, &ctypr
)) != ERROR_OK
)
1420 LOG_DEBUG("Examine failed");
1424 if ((retval
= mem_ap_read_atomic_u32(swjdp
,
1425 armv7a
->debug_base
+ CPUDBG_TTYPR
, &ttypr
)) != ERROR_OK
)
1427 LOG_DEBUG("Examine failed");
1431 if ((retval
= mem_ap_read_atomic_u32(swjdp
,
1432 armv7a
->debug_base
+ CPUDBG_DIDR
, &didr
)) != ERROR_OK
)
1434 LOG_DEBUG("Examine failed");
1438 LOG_DEBUG("cpuid = 0x%08" PRIx32
, cpuid
);
1439 LOG_DEBUG("ctypr = 0x%08" PRIx32
, ctypr
);
1440 LOG_DEBUG("ttypr = 0x%08" PRIx32
, ttypr
);
1441 LOG_DEBUG("didr = 0x%08" PRIx32
, didr
);
1443 armv7a
->armv4_5_common
.core_type
= ARM_MODE_MON
;
1444 cortex_a8_dpm_setup(cortex_a8
, didr
);
1446 /* Setup Breakpoint Register Pairs */
1447 cortex_a8
->brp_num
= ((didr
>> 24) & 0x0F) + 1;
1448 cortex_a8
->brp_num_context
= ((didr
>> 20) & 0x0F) + 1;
1449 cortex_a8
->brp_num_available
= cortex_a8
->brp_num
;
1450 cortex_a8
->brp_list
= calloc(cortex_a8
->brp_num
, sizeof(struct cortex_a8_brp
));
1451 // cortex_a8->brb_enabled = ????;
1452 for (i
= 0; i
< cortex_a8
->brp_num
; i
++)
1454 cortex_a8
->brp_list
[i
].used
= 0;
1455 if (i
< (cortex_a8
->brp_num
-cortex_a8
->brp_num_context
))
1456 cortex_a8
->brp_list
[i
].type
= BRP_NORMAL
;
1458 cortex_a8
->brp_list
[i
].type
= BRP_CONTEXT
;
1459 cortex_a8
->brp_list
[i
].value
= 0;
1460 cortex_a8
->brp_list
[i
].control
= 0;
1461 cortex_a8
->brp_list
[i
].BRPn
= i
;
1464 /* Setup Watchpoint Register Pairs */
1465 cortex_a8
->wrp_num
= ((didr
>> 28) & 0x0F) + 1;
1466 cortex_a8
->wrp_num_available
= cortex_a8
->wrp_num
;
1467 cortex_a8
->wrp_list
= calloc(cortex_a8
->wrp_num
, sizeof(struct cortex_a8_wrp
));
1468 for (i
= 0; i
< cortex_a8
->wrp_num
; i
++)
1470 cortex_a8
->wrp_list
[i
].used
= 0;
1471 cortex_a8
->wrp_list
[i
].type
= 0;
1472 cortex_a8
->wrp_list
[i
].value
= 0;
1473 cortex_a8
->wrp_list
[i
].control
= 0;
1474 cortex_a8
->wrp_list
[i
].WRPn
= i
;
1476 LOG_DEBUG("Configured %i hw breakpoint pairs and %i hw watchpoint pairs",
1477 cortex_a8
->brp_num
, cortex_a8
->wrp_num
);
1479 target_set_examined(target
);
1483 static int cortex_a8_examine(struct target
*target
)
1485 int retval
= ERROR_OK
;
1487 /* don't re-probe hardware after each reset */
1488 if (!target_was_examined(target
))
1489 retval
= cortex_a8_examine_first(target
);
1491 /* Configure core debug access */
1492 if (retval
== ERROR_OK
)
1493 retval
= cortex_a8_init_debug_access(target
);
1499 * Cortex-A8 target creation and initialization
1502 static int cortex_a8_init_target(struct command_context
*cmd_ctx
,
1503 struct target
*target
)
1505 /* examine_first() does a bunch of this */
1509 static int cortex_a8_init_arch_info(struct target
*target
,
1510 struct cortex_a8_common
*cortex_a8
, struct jtag_tap
*tap
)
1512 struct armv7a_common
*armv7a
= &cortex_a8
->armv7a_common
;
1513 struct arm
*armv4_5
= &armv7a
->armv4_5_common
;
1514 struct swjdp_common
*swjdp
= &armv7a
->swjdp_info
;
1516 /* Setup struct cortex_a8_common */
1517 cortex_a8
->common_magic
= CORTEX_A8_COMMON_MAGIC
;
1518 armv4_5
->arch_info
= armv7a
;
1520 /* prepare JTAG information for the new target */
1521 cortex_a8
->jtag_info
.tap
= tap
;
1522 cortex_a8
->jtag_info
.scann_size
= 4;
1524 swjdp
->dp_select_value
= -1;
1525 swjdp
->ap_csw_value
= -1;
1526 swjdp
->ap_tar_value
= -1;
1527 swjdp
->jtag_info
= &cortex_a8
->jtag_info
;
1528 swjdp
->memaccess_tck
= 80;
1530 /* Number of bits for tar autoincrement, impl. dep. at least 10 */
1531 swjdp
->tar_autoincr_block
= (1 << 10);
1533 cortex_a8
->fast_reg_read
= 0;
1535 /* register arch-specific functions */
1536 armv7a
->examine_debug_reason
= NULL
;
1538 armv7a
->post_debug_entry
= cortex_a8_post_debug_entry
;
1540 armv7a
->pre_restore_context
= NULL
;
1541 armv7a
->post_restore_context
= NULL
;
1542 armv7a
->armv4_5_mmu
.armv4_5_cache
.ctype
= -1;
1543 // armv7a->armv4_5_mmu.get_ttb = armv7a_get_ttb;
1544 armv7a
->armv4_5_mmu
.read_memory
= cortex_a8_read_memory
;
1545 armv7a
->armv4_5_mmu
.write_memory
= cortex_a8_write_memory
;
1546 // armv7a->armv4_5_mmu.disable_mmu_caches = armv7a_disable_mmu_caches;
1547 // armv7a->armv4_5_mmu.enable_mmu_caches = armv7a_enable_mmu_caches;
1548 armv7a
->armv4_5_mmu
.has_tiny_pages
= 1;
1549 armv7a
->armv4_5_mmu
.mmu_enabled
= 0;
1552 // arm7_9->handle_target_request = cortex_a8_handle_target_request;
1554 /* REVISIT v7a setup should be in a v7a-specific routine */
1555 armv4_5_init_arch_info(target
, armv4_5
);
1556 armv7a
->common_magic
= ARMV7_COMMON_MAGIC
;
1558 target_register_timer_callback(cortex_a8_handle_target_request
, 1, 1, target
);
1563 static int cortex_a8_target_create(struct target
*target
, Jim_Interp
*interp
)
1565 struct cortex_a8_common
*cortex_a8
= calloc(1, sizeof(struct cortex_a8_common
));
1567 cortex_a8_init_arch_info(target
, cortex_a8
, target
->tap
);
1572 COMMAND_HANDLER(cortex_a8_handle_cache_info_command
)
1574 struct target
*target
= get_current_target(CMD_CTX
);
1575 struct armv7a_common
*armv7a
= target_to_armv7a(target
);
1577 return armv4_5_handle_cache_info_command(CMD_CTX
,
1578 &armv7a
->armv4_5_mmu
.armv4_5_cache
);
1582 COMMAND_HANDLER(cortex_a8_handle_dbginit_command
)
1584 struct target
*target
= get_current_target(CMD_CTX
);
1586 cortex_a8_init_debug_access(target
);
1591 static const struct command_registration cortex_a8_exec_command_handlers
[] = {
1593 .name
= "cache_info",
1594 .handler
= &cortex_a8_handle_cache_info_command
,
1595 .mode
= COMMAND_EXEC
,
1596 .help
= "display information about target caches",
1600 .handler
= &cortex_a8_handle_dbginit_command
,
1601 .mode
= COMMAND_EXEC
,
1602 .help
= "Initialize core debug",
1604 COMMAND_REGISTRATION_DONE
1606 static const struct command_registration cortex_a8_command_handlers
[] = {
1608 .chain
= arm_command_handlers
,
1611 .chain
= armv7a_command_handlers
,
1614 .name
= "cortex_a8",
1615 .mode
= COMMAND_ANY
,
1616 .help
= "Cortex-A8 command group",
1617 .chain
= cortex_a8_exec_command_handlers
,
1619 COMMAND_REGISTRATION_DONE
1622 struct target_type cortexa8_target
= {
1623 .name
= "cortex_a8",
1625 .poll
= cortex_a8_poll
,
1626 .arch_state
= armv7a_arch_state
,
1628 .target_request_data
= NULL
,
1630 .halt
= cortex_a8_halt
,
1631 .resume
= cortex_a8_resume
,
1632 .step
= cortex_a8_step
,
1634 .assert_reset
= cortex_a8_assert_reset
,
1635 .deassert_reset
= cortex_a8_deassert_reset
,
1636 .soft_reset_halt
= NULL
,
1638 .get_gdb_reg_list
= armv4_5_get_gdb_reg_list
,
1640 .read_memory
= cortex_a8_read_memory
,
1641 .write_memory
= cortex_a8_write_memory
,
1642 .bulk_write_memory
= cortex_a8_bulk_write_memory
,
1644 .checksum_memory
= arm_checksum_memory
,
1645 .blank_check_memory
= arm_blank_check_memory
,
1647 .run_algorithm
= armv4_5_run_algorithm
,
1649 .add_breakpoint
= cortex_a8_add_breakpoint
,
1650 .remove_breakpoint
= cortex_a8_remove_breakpoint
,
1651 .add_watchpoint
= NULL
,
1652 .remove_watchpoint
= NULL
,
1654 .commands
= cortex_a8_command_handlers
,
1655 .target_create
= cortex_a8_target_create
,
1656 .init_target
= cortex_a8_init_target
,
1657 .examine
= cortex_a8_examine
,