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"
41 #include "arm_opcodes.h"
42 #include <helper/time_support.h>
44 static int cortex_a8_poll(struct target
*target
);
45 static int cortex_a8_debug_entry(struct target
*target
);
46 static int cortex_a8_restore_context(struct target
*target
, bool bpwp
);
47 static int cortex_a8_set_breakpoint(struct target
*target
,
48 struct breakpoint
*breakpoint
, uint8_t matchmode
);
49 static int cortex_a8_unset_breakpoint(struct target
*target
,
50 struct breakpoint
*breakpoint
);
51 static int cortex_a8_dap_read_coreregister_u32(struct target
*target
,
52 uint32_t *value
, int regnum
);
53 static int cortex_a8_dap_write_coreregister_u32(struct target
*target
,
54 uint32_t value
, int regnum
);
55 static int cortex_a8_mmu(struct target
*target
, int *enabled
);
56 static int cortex_a8_virt2phys(struct target
*target
,
57 uint32_t virt
, uint32_t *phys
);
58 static void cortex_a8_disable_mmu_caches(struct target
*target
, int mmu
,
59 int d_u_cache
, int i_cache
);
60 static void cortex_a8_enable_mmu_caches(struct target
*target
, int mmu
,
61 int d_u_cache
, int i_cache
);
62 static uint32_t cortex_a8_get_ttb(struct target
*target
);
66 * FIXME do topology discovery using the ROM; don't
67 * assume this is an OMAP3. Also, allow for multiple ARMv7-A
68 * cores, with different AP numbering ... don't use a #define
69 * for these numbers, use per-core armv7a state.
71 #define swjdp_memoryap 0
72 #define swjdp_debugap 1
73 #define OMAP3530_DEBUG_BASE 0x54011000
76 * Cortex-A8 Basic debug access, very low level assumes state is saved
78 static int cortex_a8_init_debug_access(struct target
*target
)
80 struct armv7a_common
*armv7a
= target_to_armv7a(target
);
81 struct adiv5_dap
*swjdp
= &armv7a
->dap
;
88 /* Unlocking the debug registers for modification */
89 /* The debugport might be uninitialised so try twice */
90 retval
= mem_ap_write_atomic_u32(swjdp
, armv7a
->debug_base
+ CPUDBG_LOCKACCESS
, 0xC5ACCE55);
91 if (retval
!= ERROR_OK
)
94 retval
= mem_ap_write_atomic_u32(swjdp
, armv7a
->debug_base
+ CPUDBG_LOCKACCESS
, 0xC5ACCE55);
96 if (retval
!= ERROR_OK
)
98 /* Clear Sticky Power Down status Bit in PRSR to enable access to
99 the registers in the Core Power Domain */
100 retval
= mem_ap_read_atomic_u32(swjdp
, armv7a
->debug_base
+ CPUDBG_PRSR
, &dummy
);
101 /* Enabling of instruction execution in debug mode is done in debug_entry code */
103 /* Resync breakpoint registers */
105 /* Since this is likley called from init or reset, update targtet state information*/
106 cortex_a8_poll(target
);
111 /* To reduce needless round-trips, pass in a pointer to the current
112 * DSCR value. Initialize it to zero if you just need to know the
113 * value on return from this function; or DSCR_INSTR_COMP if you
114 * happen to know that no instruction is pending.
116 static int cortex_a8_exec_opcode(struct target
*target
,
117 uint32_t opcode
, uint32_t *dscr_p
)
121 struct armv7a_common
*armv7a
= target_to_armv7a(target
);
122 struct adiv5_dap
*swjdp
= &armv7a
->dap
;
124 dscr
= dscr_p
? *dscr_p
: 0;
126 LOG_DEBUG("exec opcode 0x%08" PRIx32
, opcode
);
128 /* Wait for InstrCompl bit to be set */
129 while ((dscr
& DSCR_INSTR_COMP
) == 0)
131 retval
= mem_ap_read_atomic_u32(swjdp
,
132 armv7a
->debug_base
+ CPUDBG_DSCR
, &dscr
);
133 if (retval
!= ERROR_OK
)
135 LOG_ERROR("Could not read DSCR register, opcode = 0x%08" PRIx32
, opcode
);
140 mem_ap_write_u32(swjdp
, armv7a
->debug_base
+ CPUDBG_ITR
, opcode
);
144 retval
= mem_ap_read_atomic_u32(swjdp
,
145 armv7a
->debug_base
+ CPUDBG_DSCR
, &dscr
);
146 if (retval
!= ERROR_OK
)
148 LOG_ERROR("Could not read DSCR register");
152 while ((dscr
& DSCR_INSTR_COMP
) == 0); /* Wait for InstrCompl bit to be set */
160 /**************************************************************************
161 Read core register with very few exec_opcode, fast but needs work_area.
162 This can cause problems with MMU active.
163 **************************************************************************/
164 static int cortex_a8_read_regs_through_mem(struct target
*target
, uint32_t address
,
167 int retval
= ERROR_OK
;
168 struct armv7a_common
*armv7a
= target_to_armv7a(target
);
169 struct adiv5_dap
*swjdp
= &armv7a
->dap
;
171 cortex_a8_dap_read_coreregister_u32(target
, regfile
, 0);
172 cortex_a8_dap_write_coreregister_u32(target
, address
, 0);
173 cortex_a8_exec_opcode(target
, ARMV4_5_STMIA(0, 0xFFFE, 0, 0), NULL
);
174 dap_ap_select(swjdp
, swjdp_memoryap
);
175 mem_ap_read_buf_u32(swjdp
, (uint8_t *)(®file
[1]), 4*15, address
);
176 dap_ap_select(swjdp
, swjdp_debugap
);
181 static int cortex_a8_dap_read_coreregister_u32(struct target
*target
,
182 uint32_t *value
, int regnum
)
184 int retval
= ERROR_OK
;
185 uint8_t reg
= regnum
&0xFF;
187 struct armv7a_common
*armv7a
= target_to_armv7a(target
);
188 struct adiv5_dap
*swjdp
= &armv7a
->dap
;
195 /* Rn to DCCTX, "MCR p14, 0, Rn, c0, c5, 0" 0xEE00nE15 */
196 cortex_a8_exec_opcode(target
,
197 ARMV4_5_MCR(14, 0, reg
, 0, 5, 0),
202 /* "MOV r0, r15"; then move r0 to DCCTX */
203 cortex_a8_exec_opcode(target
, 0xE1A0000F, &dscr
);
204 cortex_a8_exec_opcode(target
,
205 ARMV4_5_MCR(14, 0, 0, 0, 5, 0),
210 /* "MRS r0, CPSR" or "MRS r0, SPSR"
211 * then move r0 to DCCTX
213 cortex_a8_exec_opcode(target
, ARMV4_5_MRS(0, reg
& 1), &dscr
);
214 cortex_a8_exec_opcode(target
,
215 ARMV4_5_MCR(14, 0, 0, 0, 5, 0),
219 /* Wait for DTRRXfull then read DTRRTX */
220 while ((dscr
& DSCR_DTR_TX_FULL
) == 0)
222 retval
= mem_ap_read_atomic_u32(swjdp
,
223 armv7a
->debug_base
+ CPUDBG_DSCR
, &dscr
);
226 retval
= mem_ap_read_atomic_u32(swjdp
,
227 armv7a
->debug_base
+ CPUDBG_DTRTX
, value
);
228 LOG_DEBUG("read DCC 0x%08" PRIx32
, *value
);
233 static int cortex_a8_dap_write_coreregister_u32(struct target
*target
,
234 uint32_t value
, int regnum
)
236 int retval
= ERROR_OK
;
237 uint8_t Rd
= regnum
&0xFF;
239 struct armv7a_common
*armv7a
= target_to_armv7a(target
);
240 struct adiv5_dap
*swjdp
= &armv7a
->dap
;
242 LOG_DEBUG("register %i, value 0x%08" PRIx32
, regnum
, value
);
244 /* Check that DCCRX is not full */
245 retval
= mem_ap_read_atomic_u32(swjdp
,
246 armv7a
->debug_base
+ CPUDBG_DSCR
, &dscr
);
247 if (dscr
& DSCR_DTR_RX_FULL
)
249 LOG_ERROR("DSCR_DTR_RX_FULL, dscr 0x%08" PRIx32
, dscr
);
250 /* Clear DCCRX with MCR(p14, 0, Rd, c0, c5, 0), opcode 0xEE000E15 */
251 cortex_a8_exec_opcode(target
, ARMV4_5_MRC(14, 0, 0, 0, 5, 0),
258 /* Write DTRRX ... sets DSCR.DTRRXfull but exec_opcode() won't care */
259 LOG_DEBUG("write DCC 0x%08" PRIx32
, value
);
260 retval
= mem_ap_write_u32(swjdp
,
261 armv7a
->debug_base
+ CPUDBG_DTRRX
, value
);
265 /* DCCRX to Rn, "MCR p14, 0, Rn, c0, c5, 0", 0xEE00nE15 */
266 cortex_a8_exec_opcode(target
, ARMV4_5_MRC(14, 0, Rd
, 0, 5, 0),
271 /* DCCRX to R0, "MCR p14, 0, R0, c0, c5, 0", 0xEE000E15
274 cortex_a8_exec_opcode(target
, ARMV4_5_MRC(14, 0, 0, 0, 5, 0),
276 cortex_a8_exec_opcode(target
, 0xE1A0F000, &dscr
);
280 /* DCCRX to R0, "MCR p14, 0, R0, c0, c5, 0", 0xEE000E15
281 * then "MSR CPSR_cxsf, r0" or "MSR SPSR_cxsf, r0" (all fields)
283 cortex_a8_exec_opcode(target
, ARMV4_5_MRC(14, 0, 0, 0, 5, 0),
285 cortex_a8_exec_opcode(target
, ARMV4_5_MSR_GP(0, 0xF, Rd
& 1),
288 /* "Prefetch flush" after modifying execution status in CPSR */
290 cortex_a8_exec_opcode(target
,
291 ARMV4_5_MCR(15, 0, 0, 7, 5, 4),
298 /* Write to memory mapped registers directly with no cache or mmu handling */
299 static int cortex_a8_dap_write_memap_register_u32(struct target
*target
, uint32_t address
, uint32_t value
)
302 struct armv7a_common
*armv7a
= target_to_armv7a(target
);
303 struct adiv5_dap
*swjdp
= &armv7a
->dap
;
305 retval
= mem_ap_write_atomic_u32(swjdp
, address
, value
);
311 * Cortex-A8 implementation of Debug Programmer's Model
313 * NOTE the invariant: these routines return with DSCR_INSTR_COMP set,
314 * so there's no need to poll for it before executing an instruction.
316 * NOTE that in several of these cases the "stall" mode might be useful.
317 * It'd let us queue a few operations together... prepare/finish might
318 * be the places to enable/disable that mode.
321 static inline struct cortex_a8_common
*dpm_to_a8(struct arm_dpm
*dpm
)
323 return container_of(dpm
, struct cortex_a8_common
, armv7a_common
.dpm
);
326 static int cortex_a8_write_dcc(struct cortex_a8_common
*a8
, uint32_t data
)
328 LOG_DEBUG("write DCC 0x%08" PRIx32
, data
);
329 return mem_ap_write_u32(&a8
->armv7a_common
.dap
,
330 a8
->armv7a_common
.debug_base
+ CPUDBG_DTRRX
, data
);
333 static int cortex_a8_read_dcc(struct cortex_a8_common
*a8
, uint32_t *data
,
336 struct adiv5_dap
*swjdp
= &a8
->armv7a_common
.dap
;
337 uint32_t dscr
= DSCR_INSTR_COMP
;
343 /* Wait for DTRRXfull */
344 while ((dscr
& DSCR_DTR_TX_FULL
) == 0) {
345 retval
= mem_ap_read_atomic_u32(swjdp
,
346 a8
->armv7a_common
.debug_base
+ CPUDBG_DSCR
,
350 retval
= mem_ap_read_atomic_u32(swjdp
,
351 a8
->armv7a_common
.debug_base
+ CPUDBG_DTRTX
, data
);
352 //LOG_DEBUG("read DCC 0x%08" PRIx32, *data);
360 static int cortex_a8_dpm_prepare(struct arm_dpm
*dpm
)
362 struct cortex_a8_common
*a8
= dpm_to_a8(dpm
);
363 struct adiv5_dap
*swjdp
= &a8
->armv7a_common
.dap
;
367 /* set up invariant: INSTR_COMP is set after ever DPM operation */
368 long long then
= timeval_ms();
371 retval
= mem_ap_read_atomic_u32(swjdp
,
372 a8
->armv7a_common
.debug_base
+ CPUDBG_DSCR
,
374 if (retval
!= ERROR_OK
)
376 if ((dscr
& DSCR_INSTR_COMP
) != 0)
378 if (timeval_ms() > then
+ 1000)
380 LOG_ERROR("Timeout waiting for dpm prepare");
385 /* this "should never happen" ... */
386 if (dscr
& DSCR_DTR_RX_FULL
) {
387 LOG_ERROR("DSCR_DTR_RX_FULL, dscr 0x%08" PRIx32
, dscr
);
389 retval
= cortex_a8_exec_opcode(
390 a8
->armv7a_common
.armv4_5_common
.target
,
391 ARMV4_5_MRC(14, 0, 0, 0, 5, 0),
398 static int cortex_a8_dpm_finish(struct arm_dpm
*dpm
)
400 /* REVISIT what could be done here? */
404 static int cortex_a8_instr_write_data_dcc(struct arm_dpm
*dpm
,
405 uint32_t opcode
, uint32_t data
)
407 struct cortex_a8_common
*a8
= dpm_to_a8(dpm
);
409 uint32_t dscr
= DSCR_INSTR_COMP
;
411 retval
= cortex_a8_write_dcc(a8
, data
);
413 return cortex_a8_exec_opcode(
414 a8
->armv7a_common
.armv4_5_common
.target
,
419 static int cortex_a8_instr_write_data_r0(struct arm_dpm
*dpm
,
420 uint32_t opcode
, uint32_t data
)
422 struct cortex_a8_common
*a8
= dpm_to_a8(dpm
);
423 uint32_t dscr
= DSCR_INSTR_COMP
;
426 retval
= cortex_a8_write_dcc(a8
, data
);
428 /* DCCRX to R0, "MCR p14, 0, R0, c0, c5, 0", 0xEE000E15 */
429 retval
= cortex_a8_exec_opcode(
430 a8
->armv7a_common
.armv4_5_common
.target
,
431 ARMV4_5_MRC(14, 0, 0, 0, 5, 0),
434 /* then the opcode, taking data from R0 */
435 retval
= cortex_a8_exec_opcode(
436 a8
->armv7a_common
.armv4_5_common
.target
,
443 static int cortex_a8_instr_cpsr_sync(struct arm_dpm
*dpm
)
445 struct target
*target
= dpm
->arm
->target
;
446 uint32_t dscr
= DSCR_INSTR_COMP
;
448 /* "Prefetch flush" after modifying execution status in CPSR */
449 return cortex_a8_exec_opcode(target
,
450 ARMV4_5_MCR(15, 0, 0, 7, 5, 4),
454 static int cortex_a8_instr_read_data_dcc(struct arm_dpm
*dpm
,
455 uint32_t opcode
, uint32_t *data
)
457 struct cortex_a8_common
*a8
= dpm_to_a8(dpm
);
459 uint32_t dscr
= DSCR_INSTR_COMP
;
461 /* the opcode, writing data to DCC */
462 retval
= cortex_a8_exec_opcode(
463 a8
->armv7a_common
.armv4_5_common
.target
,
467 return cortex_a8_read_dcc(a8
, data
, &dscr
);
471 static int cortex_a8_instr_read_data_r0(struct arm_dpm
*dpm
,
472 uint32_t opcode
, uint32_t *data
)
474 struct cortex_a8_common
*a8
= dpm_to_a8(dpm
);
475 uint32_t dscr
= DSCR_INSTR_COMP
;
478 /* the opcode, writing data to R0 */
479 retval
= cortex_a8_exec_opcode(
480 a8
->armv7a_common
.armv4_5_common
.target
,
484 /* write R0 to DCC */
485 retval
= cortex_a8_exec_opcode(
486 a8
->armv7a_common
.armv4_5_common
.target
,
487 ARMV4_5_MCR(14, 0, 0, 0, 5, 0),
490 return cortex_a8_read_dcc(a8
, data
, &dscr
);
493 static int cortex_a8_bpwp_enable(struct arm_dpm
*dpm
, unsigned index_t
,
494 uint32_t addr
, uint32_t control
)
496 struct cortex_a8_common
*a8
= dpm_to_a8(dpm
);
497 uint32_t vr
= a8
->armv7a_common
.debug_base
;
498 uint32_t cr
= a8
->armv7a_common
.debug_base
;
502 case 0 ... 15: /* breakpoints */
503 vr
+= CPUDBG_BVR_BASE
;
504 cr
+= CPUDBG_BCR_BASE
;
506 case 16 ... 31: /* watchpoints */
507 vr
+= CPUDBG_WVR_BASE
;
508 cr
+= CPUDBG_WCR_BASE
;
517 LOG_DEBUG("A8: bpwp enable, vr %08x cr %08x",
518 (unsigned) vr
, (unsigned) cr
);
520 retval
= cortex_a8_dap_write_memap_register_u32(dpm
->arm
->target
,
522 if (retval
!= ERROR_OK
)
524 retval
= cortex_a8_dap_write_memap_register_u32(dpm
->arm
->target
,
529 static int cortex_a8_bpwp_disable(struct arm_dpm
*dpm
, unsigned index_t
)
531 struct cortex_a8_common
*a8
= dpm_to_a8(dpm
);
536 cr
= a8
->armv7a_common
.debug_base
+ CPUDBG_BCR_BASE
;
539 cr
= a8
->armv7a_common
.debug_base
+ CPUDBG_WCR_BASE
;
547 LOG_DEBUG("A8: bpwp disable, cr %08x", (unsigned) cr
);
549 /* clear control register */
550 return cortex_a8_dap_write_memap_register_u32(dpm
->arm
->target
, cr
, 0);
553 static int cortex_a8_dpm_setup(struct cortex_a8_common
*a8
, uint32_t didr
)
555 struct arm_dpm
*dpm
= &a8
->armv7a_common
.dpm
;
558 dpm
->arm
= &a8
->armv7a_common
.armv4_5_common
;
561 dpm
->prepare
= cortex_a8_dpm_prepare
;
562 dpm
->finish
= cortex_a8_dpm_finish
;
564 dpm
->instr_write_data_dcc
= cortex_a8_instr_write_data_dcc
;
565 dpm
->instr_write_data_r0
= cortex_a8_instr_write_data_r0
;
566 dpm
->instr_cpsr_sync
= cortex_a8_instr_cpsr_sync
;
568 dpm
->instr_read_data_dcc
= cortex_a8_instr_read_data_dcc
;
569 dpm
->instr_read_data_r0
= cortex_a8_instr_read_data_r0
;
571 dpm
->bpwp_enable
= cortex_a8_bpwp_enable
;
572 dpm
->bpwp_disable
= cortex_a8_bpwp_disable
;
574 retval
= arm_dpm_setup(dpm
);
575 if (retval
== ERROR_OK
)
576 retval
= arm_dpm_initialize(dpm
);
583 * Cortex-A8 Run control
586 static int cortex_a8_poll(struct target
*target
)
588 int retval
= ERROR_OK
;
590 struct cortex_a8_common
*cortex_a8
= target_to_cortex_a8(target
);
591 struct armv7a_common
*armv7a
= &cortex_a8
->armv7a_common
;
592 struct adiv5_dap
*swjdp
= &armv7a
->dap
;
593 enum target_state prev_target_state
= target
->state
;
594 uint8_t saved_apsel
= dap_ap_get_select(swjdp
);
596 dap_ap_select(swjdp
, swjdp_debugap
);
597 retval
= mem_ap_read_atomic_u32(swjdp
,
598 armv7a
->debug_base
+ CPUDBG_DSCR
, &dscr
);
599 if (retval
!= ERROR_OK
)
601 dap_ap_select(swjdp
, saved_apsel
);
604 cortex_a8
->cpudbg_dscr
= dscr
;
606 if ((dscr
& 0x3) == 0x3)
608 if (prev_target_state
!= TARGET_HALTED
)
610 /* We have a halting debug event */
611 LOG_DEBUG("Target halted");
612 target
->state
= TARGET_HALTED
;
613 if ((prev_target_state
== TARGET_RUNNING
)
614 || (prev_target_state
== TARGET_RESET
))
616 retval
= cortex_a8_debug_entry(target
);
617 if (retval
!= ERROR_OK
)
620 target_call_event_callbacks(target
,
621 TARGET_EVENT_HALTED
);
623 if (prev_target_state
== TARGET_DEBUG_RUNNING
)
627 retval
= cortex_a8_debug_entry(target
);
628 if (retval
!= ERROR_OK
)
631 target_call_event_callbacks(target
,
632 TARGET_EVENT_DEBUG_HALTED
);
636 else if ((dscr
& 0x3) == 0x2)
638 target
->state
= TARGET_RUNNING
;
642 LOG_DEBUG("Unknown target state dscr = 0x%08" PRIx32
, dscr
);
643 target
->state
= TARGET_UNKNOWN
;
646 dap_ap_select(swjdp
, saved_apsel
);
651 static int cortex_a8_halt(struct target
*target
)
653 int retval
= ERROR_OK
;
655 struct armv7a_common
*armv7a
= target_to_armv7a(target
);
656 struct adiv5_dap
*swjdp
= &armv7a
->dap
;
657 uint8_t saved_apsel
= dap_ap_get_select(swjdp
);
658 dap_ap_select(swjdp
, swjdp_debugap
);
661 * Tell the core to be halted by writing DRCR with 0x1
662 * and then wait for the core to be halted.
664 retval
= mem_ap_write_atomic_u32(swjdp
,
665 armv7a
->debug_base
+ CPUDBG_DRCR
, 0x1);
666 if (retval
!= ERROR_OK
)
670 * enter halting debug mode
672 retval
= mem_ap_read_atomic_u32(swjdp
, armv7a
->debug_base
+ CPUDBG_DSCR
, &dscr
);
673 if (retval
!= ERROR_OK
)
676 retval
= mem_ap_write_atomic_u32(swjdp
,
677 armv7a
->debug_base
+ CPUDBG_DSCR
, dscr
| DSCR_HALT_DBG_MODE
);
678 if (retval
!= ERROR_OK
)
681 long long then
= timeval_ms();
684 retval
= mem_ap_read_atomic_u32(swjdp
,
685 armv7a
->debug_base
+ CPUDBG_DSCR
, &dscr
);
686 if (retval
!= ERROR_OK
)
688 if ((dscr
& DSCR_CORE_HALTED
) != 0)
692 if (timeval_ms() > then
+ 1000)
694 LOG_ERROR("Timeout waiting for halt");
699 target
->debug_reason
= DBG_REASON_DBGRQ
;
702 dap_ap_select(swjdp
, saved_apsel
);
706 static int cortex_a8_resume(struct target
*target
, int current
,
707 uint32_t address
, int handle_breakpoints
, int debug_execution
)
709 struct armv7a_common
*armv7a
= target_to_armv7a(target
);
710 struct arm
*armv4_5
= &armv7a
->armv4_5_common
;
711 struct adiv5_dap
*swjdp
= &armv7a
->dap
;
714 // struct breakpoint *breakpoint = NULL;
715 uint32_t resume_pc
, dscr
;
717 uint8_t saved_apsel
= dap_ap_get_select(swjdp
);
718 dap_ap_select(swjdp
, swjdp_debugap
);
720 if (!debug_execution
)
721 target_free_all_working_areas(target
);
726 /* Disable interrupts */
727 /* We disable interrupts in the PRIMASK register instead of
728 * masking with C_MASKINTS,
729 * This is probably the same issue as Cortex-M3 Errata 377493:
730 * C_MASKINTS in parallel with disabled interrupts can cause
731 * local faults to not be taken. */
732 buf_set_u32(armv7m
->core_cache
->reg_list
[ARMV7M_PRIMASK
].value
, 0, 32, 1);
733 armv7m
->core_cache
->reg_list
[ARMV7M_PRIMASK
].dirty
= 1;
734 armv7m
->core_cache
->reg_list
[ARMV7M_PRIMASK
].valid
= 1;
736 /* Make sure we are in Thumb mode */
737 buf_set_u32(armv7m
->core_cache
->reg_list
[ARMV7M_xPSR
].value
, 0, 32,
738 buf_get_u32(armv7m
->core_cache
->reg_list
[ARMV7M_xPSR
].value
, 0, 32) | (1 << 24));
739 armv7m
->core_cache
->reg_list
[ARMV7M_xPSR
].dirty
= 1;
740 armv7m
->core_cache
->reg_list
[ARMV7M_xPSR
].valid
= 1;
744 /* current = 1: continue on current pc, otherwise continue at <address> */
745 resume_pc
= buf_get_u32(armv4_5
->pc
->value
, 0, 32);
749 /* Make sure that the Armv7 gdb thumb fixups does not
750 * kill the return address
752 switch (armv4_5
->core_state
)
755 resume_pc
&= 0xFFFFFFFC;
757 case ARM_STATE_THUMB
:
758 case ARM_STATE_THUMB_EE
:
759 /* When the return address is loaded into PC
760 * bit 0 must be 1 to stay in Thumb state
764 case ARM_STATE_JAZELLE
:
765 LOG_ERROR("How do I resume into Jazelle state??");
768 LOG_DEBUG("resume pc = 0x%08" PRIx32
, resume_pc
);
769 buf_set_u32(armv4_5
->pc
->value
, 0, 32, resume_pc
);
770 armv4_5
->pc
->dirty
= 1;
771 armv4_5
->pc
->valid
= 1;
773 cortex_a8_restore_context(target
, handle_breakpoints
);
776 /* the front-end may request us not to handle breakpoints */
777 if (handle_breakpoints
)
779 /* Single step past breakpoint at current address */
780 if ((breakpoint
= breakpoint_find(target
, resume_pc
)))
782 LOG_DEBUG("unset breakpoint at 0x%8.8x", breakpoint
->address
);
783 cortex_m3_unset_breakpoint(target
, breakpoint
);
784 cortex_m3_single_step_core(target
);
785 cortex_m3_set_breakpoint(target
, breakpoint
);
790 /* Restart core and wait for it to be started
791 * NOTE: this clears DSCR_ITR_EN and other bits.
793 * REVISIT: for single stepping, we probably want to
794 * disable IRQs by default, with optional override...
796 retval
= mem_ap_write_atomic_u32(swjdp
, armv7a
->debug_base
+ CPUDBG_DRCR
, 0x2);
797 if (retval
!= ERROR_OK
)
800 long long then
= timeval_ms();
803 retval
= mem_ap_read_atomic_u32(swjdp
,
804 armv7a
->debug_base
+ CPUDBG_DSCR
, &dscr
);
805 if (retval
!= ERROR_OK
)
807 if ((dscr
& DSCR_CORE_RESTARTED
) != 0)
809 if (timeval_ms() > then
+ 1000)
811 LOG_ERROR("Timeout waiting for resume");
816 target
->debug_reason
= DBG_REASON_NOTHALTED
;
817 target
->state
= TARGET_RUNNING
;
819 /* registers are now invalid */
820 register_cache_invalidate(armv4_5
->core_cache
);
822 if (!debug_execution
)
824 target
->state
= TARGET_RUNNING
;
825 target_call_event_callbacks(target
, TARGET_EVENT_RESUMED
);
826 LOG_DEBUG("target resumed at 0x%" PRIx32
, resume_pc
);
830 target
->state
= TARGET_DEBUG_RUNNING
;
831 target_call_event_callbacks(target
, TARGET_EVENT_DEBUG_RESUMED
);
832 LOG_DEBUG("target debug resumed at 0x%" PRIx32
, resume_pc
);
835 dap_ap_select(swjdp
, saved_apsel
);
840 static int cortex_a8_debug_entry(struct target
*target
)
843 uint32_t regfile
[16], cpsr
, dscr
;
844 int retval
= ERROR_OK
;
845 struct working_area
*regfile_working_area
= NULL
;
846 struct cortex_a8_common
*cortex_a8
= target_to_cortex_a8(target
);
847 struct armv7a_common
*armv7a
= target_to_armv7a(target
);
848 struct arm
*armv4_5
= &armv7a
->armv4_5_common
;
849 struct adiv5_dap
*swjdp
= &armv7a
->dap
;
852 LOG_DEBUG("dscr = 0x%08" PRIx32
, cortex_a8
->cpudbg_dscr
);
854 /* REVISIT surely we should not re-read DSCR !! */
855 retval
= mem_ap_read_atomic_u32(swjdp
,
856 armv7a
->debug_base
+ CPUDBG_DSCR
, &dscr
);
857 if (retval
!= ERROR_OK
)
860 /* REVISIT see A8 TRM 12.11.4 steps 2..3 -- make sure that any
861 * imprecise data aborts get discarded by issuing a Data
862 * Synchronization Barrier: ARMV4_5_MCR(15, 0, 0, 7, 10, 4).
865 /* Enable the ITR execution once we are in debug mode */
867 retval
= mem_ap_write_atomic_u32(swjdp
,
868 armv7a
->debug_base
+ CPUDBG_DSCR
, dscr
);
869 if (retval
!= ERROR_OK
)
872 /* Examine debug reason */
873 arm_dpm_report_dscr(&armv7a
->dpm
, cortex_a8
->cpudbg_dscr
);
875 /* save address of instruction that triggered the watchpoint? */
876 if (target
->debug_reason
== DBG_REASON_WATCHPOINT
) {
879 retval
= mem_ap_read_atomic_u32(swjdp
,
880 armv7a
->debug_base
+ CPUDBG_WFAR
,
882 if (retval
!= ERROR_OK
)
884 arm_dpm_report_wfar(&armv7a
->dpm
, wfar
);
887 /* REVISIT fast_reg_read is never set ... */
889 /* Examine target state and mode */
890 if (cortex_a8
->fast_reg_read
)
891 target_alloc_working_area(target
, 64, ®file_working_area
);
893 /* First load register acessible through core debug port*/
894 if (!regfile_working_area
)
896 retval
= arm_dpm_read_current_registers(&armv7a
->dpm
);
900 dap_ap_select(swjdp
, swjdp_memoryap
);
901 cortex_a8_read_regs_through_mem(target
,
902 regfile_working_area
->address
, regfile
);
903 dap_ap_select(swjdp
, swjdp_memoryap
);
904 target_free_working_area(target
, regfile_working_area
);
906 /* read Current PSR */
907 cortex_a8_dap_read_coreregister_u32(target
, &cpsr
, 16);
908 dap_ap_select(swjdp
, swjdp_debugap
);
909 LOG_DEBUG("cpsr: %8.8" PRIx32
, cpsr
);
911 arm_set_cpsr(armv4_5
, cpsr
);
914 for (i
= 0; i
<= ARM_PC
; i
++)
916 reg
= arm_reg_current(armv4_5
, i
);
918 buf_set_u32(reg
->value
, 0, 32, regfile
[i
]);
923 /* Fixup PC Resume Address */
926 // T bit set for Thumb or ThumbEE state
927 regfile
[ARM_PC
] -= 4;
932 regfile
[ARM_PC
] -= 8;
936 buf_set_u32(reg
->value
, 0, 32, regfile
[ARM_PC
]);
937 reg
->dirty
= reg
->valid
;
941 /* TODO, Move this */
942 uint32_t cp15_control_register
, cp15_cacr
, cp15_nacr
;
943 cortex_a8_read_cp(target
, &cp15_control_register
, 15, 0, 1, 0, 0);
944 LOG_DEBUG("cp15_control_register = 0x%08x", cp15_control_register
);
946 cortex_a8_read_cp(target
, &cp15_cacr
, 15, 0, 1, 0, 2);
947 LOG_DEBUG("cp15 Coprocessor Access Control Register = 0x%08x", cp15_cacr
);
949 cortex_a8_read_cp(target
, &cp15_nacr
, 15, 0, 1, 1, 2);
950 LOG_DEBUG("cp15 Nonsecure Access Control Register = 0x%08x", cp15_nacr
);
953 /* Are we in an exception handler */
954 // armv4_5->exception_number = 0;
955 if (armv7a
->post_debug_entry
)
956 armv7a
->post_debug_entry(target
);
961 static void cortex_a8_post_debug_entry(struct target
*target
)
963 struct cortex_a8_common
*cortex_a8
= target_to_cortex_a8(target
);
964 struct armv7a_common
*armv7a
= &cortex_a8
->armv7a_common
;
967 /* MRC p15,0,<Rt>,c1,c0,0 ; Read CP15 System Control Register */
968 retval
= armv7a
->armv4_5_common
.mrc(target
, 15,
971 &cortex_a8
->cp15_control_reg
);
972 LOG_DEBUG("cp15_control_reg: %8.8" PRIx32
, cortex_a8
->cp15_control_reg
);
974 if (armv7a
->armv4_5_mmu
.armv4_5_cache
.ctype
== -1)
976 uint32_t cache_type_reg
;
978 /* MRC p15,0,<Rt>,c0,c0,1 ; Read CP15 Cache Type Register */
979 retval
= armv7a
->armv4_5_common
.mrc(target
, 15,
983 LOG_DEBUG("cp15 cache type: %8.8x", (unsigned) cache_type_reg
);
985 /* FIXME the armv4_4 cache info DOES NOT APPLY to Cortex-A8 */
986 armv4_5_identify_cache(cache_type_reg
,
987 &armv7a
->armv4_5_mmu
.armv4_5_cache
);
990 armv7a
->armv4_5_mmu
.mmu_enabled
=
991 (cortex_a8
->cp15_control_reg
& 0x1U
) ? 1 : 0;
992 armv7a
->armv4_5_mmu
.armv4_5_cache
.d_u_cache_enabled
=
993 (cortex_a8
->cp15_control_reg
& 0x4U
) ? 1 : 0;
994 armv7a
->armv4_5_mmu
.armv4_5_cache
.i_cache_enabled
=
995 (cortex_a8
->cp15_control_reg
& 0x1000U
) ? 1 : 0;
1000 static int cortex_a8_step(struct target
*target
, int current
, uint32_t address
,
1001 int handle_breakpoints
)
1003 struct armv7a_common
*armv7a
= target_to_armv7a(target
);
1004 struct arm
*armv4_5
= &armv7a
->armv4_5_common
;
1005 struct breakpoint
*breakpoint
= NULL
;
1006 struct breakpoint stepbreakpoint
;
1011 if (target
->state
!= TARGET_HALTED
)
1013 LOG_WARNING("target not halted");
1014 return ERROR_TARGET_NOT_HALTED
;
1017 /* current = 1: continue on current pc, otherwise continue at <address> */
1021 buf_set_u32(r
->value
, 0, 32, address
);
1025 address
= buf_get_u32(r
->value
, 0, 32);
1028 /* The front-end may request us not to handle breakpoints.
1029 * But since Cortex-A8 uses breakpoint for single step,
1030 * we MUST handle breakpoints.
1032 handle_breakpoints
= 1;
1033 if (handle_breakpoints
) {
1034 breakpoint
= breakpoint_find(target
, address
);
1036 cortex_a8_unset_breakpoint(target
, breakpoint
);
1039 /* Setup single step breakpoint */
1040 stepbreakpoint
.address
= address
;
1041 stepbreakpoint
.length
= (armv4_5
->core_state
== ARM_STATE_THUMB
)
1043 stepbreakpoint
.type
= BKPT_HARD
;
1044 stepbreakpoint
.set
= 0;
1046 /* Break on IVA mismatch */
1047 cortex_a8_set_breakpoint(target
, &stepbreakpoint
, 0x04);
1049 target
->debug_reason
= DBG_REASON_SINGLESTEP
;
1051 cortex_a8_resume(target
, 1, address
, 0, 0);
1053 while (target
->state
!= TARGET_HALTED
)
1055 cortex_a8_poll(target
);
1058 LOG_WARNING("timeout waiting for target halt");
1063 cortex_a8_unset_breakpoint(target
, &stepbreakpoint
);
1065 target
->debug_reason
= DBG_REASON_BREAKPOINT
;
1068 cortex_a8_set_breakpoint(target
, breakpoint
, 0);
1070 if (target
->state
!= TARGET_HALTED
)
1071 LOG_DEBUG("target stepped");
1076 static int cortex_a8_restore_context(struct target
*target
, bool bpwp
)
1078 struct armv7a_common
*armv7a
= target_to_armv7a(target
);
1082 if (armv7a
->pre_restore_context
)
1083 armv7a
->pre_restore_context(target
);
1085 arm_dpm_write_dirty_registers(&armv7a
->dpm
, bpwp
);
1092 * Cortex-A8 Breakpoint and watchpoint fuctions
1095 /* Setup hardware Breakpoint Register Pair */
1096 static int cortex_a8_set_breakpoint(struct target
*target
,
1097 struct breakpoint
*breakpoint
, uint8_t matchmode
)
1102 uint8_t byte_addr_select
= 0x0F;
1103 struct cortex_a8_common
*cortex_a8
= target_to_cortex_a8(target
);
1104 struct armv7a_common
*armv7a
= &cortex_a8
->armv7a_common
;
1105 struct cortex_a8_brp
* brp_list
= cortex_a8
->brp_list
;
1107 if (breakpoint
->set
)
1109 LOG_WARNING("breakpoint already set");
1113 if (breakpoint
->type
== BKPT_HARD
)
1115 while (brp_list
[brp_i
].used
&& (brp_i
< cortex_a8
->brp_num
))
1117 if (brp_i
>= cortex_a8
->brp_num
)
1119 LOG_ERROR("ERROR Can not find free Breakpoint Register Pair");
1122 breakpoint
->set
= brp_i
+ 1;
1123 if (breakpoint
->length
== 2)
1125 byte_addr_select
= (3 << (breakpoint
->address
& 0x02));
1127 control
= ((matchmode
& 0x7) << 20)
1128 | (byte_addr_select
<< 5)
1130 brp_list
[brp_i
].used
= 1;
1131 brp_list
[brp_i
].value
= (breakpoint
->address
& 0xFFFFFFFC);
1132 brp_list
[brp_i
].control
= control
;
1133 cortex_a8_dap_write_memap_register_u32(target
, armv7a
->debug_base
1134 + CPUDBG_BVR_BASE
+ 4 * brp_list
[brp_i
].BRPn
,
1135 brp_list
[brp_i
].value
);
1136 cortex_a8_dap_write_memap_register_u32(target
, armv7a
->debug_base
1137 + CPUDBG_BCR_BASE
+ 4 * brp_list
[brp_i
].BRPn
,
1138 brp_list
[brp_i
].control
);
1139 LOG_DEBUG("brp %i control 0x%0" PRIx32
" value 0x%0" PRIx32
, brp_i
,
1140 brp_list
[brp_i
].control
,
1141 brp_list
[brp_i
].value
);
1143 else if (breakpoint
->type
== BKPT_SOFT
)
1146 if (breakpoint
->length
== 2)
1148 buf_set_u32(code
, 0, 32, ARMV5_T_BKPT(0x11));
1152 buf_set_u32(code
, 0, 32, ARMV5_BKPT(0x11));
1154 retval
= target
->type
->read_memory(target
,
1155 breakpoint
->address
& 0xFFFFFFFE,
1156 breakpoint
->length
, 1,
1157 breakpoint
->orig_instr
);
1158 if (retval
!= ERROR_OK
)
1160 retval
= target
->type
->write_memory(target
,
1161 breakpoint
->address
& 0xFFFFFFFE,
1162 breakpoint
->length
, 1, code
);
1163 if (retval
!= ERROR_OK
)
1165 breakpoint
->set
= 0x11; /* Any nice value but 0 */
1171 static int cortex_a8_unset_breakpoint(struct target
*target
, struct breakpoint
*breakpoint
)
1174 struct cortex_a8_common
*cortex_a8
= target_to_cortex_a8(target
);
1175 struct armv7a_common
*armv7a
= &cortex_a8
->armv7a_common
;
1176 struct cortex_a8_brp
* brp_list
= cortex_a8
->brp_list
;
1178 if (!breakpoint
->set
)
1180 LOG_WARNING("breakpoint not set");
1184 if (breakpoint
->type
== BKPT_HARD
)
1186 int brp_i
= breakpoint
->set
- 1;
1187 if ((brp_i
< 0) || (brp_i
>= cortex_a8
->brp_num
))
1189 LOG_DEBUG("Invalid BRP number in breakpoint");
1192 LOG_DEBUG("rbp %i control 0x%0" PRIx32
" value 0x%0" PRIx32
, brp_i
,
1193 brp_list
[brp_i
].control
, brp_list
[brp_i
].value
);
1194 brp_list
[brp_i
].used
= 0;
1195 brp_list
[brp_i
].value
= 0;
1196 brp_list
[brp_i
].control
= 0;
1197 cortex_a8_dap_write_memap_register_u32(target
, armv7a
->debug_base
1198 + CPUDBG_BCR_BASE
+ 4 * brp_list
[brp_i
].BRPn
,
1199 brp_list
[brp_i
].control
);
1200 cortex_a8_dap_write_memap_register_u32(target
, armv7a
->debug_base
1201 + CPUDBG_BVR_BASE
+ 4 * brp_list
[brp_i
].BRPn
,
1202 brp_list
[brp_i
].value
);
1206 /* restore original instruction (kept in target endianness) */
1207 if (breakpoint
->length
== 4)
1209 retval
= target
->type
->write_memory(target
,
1210 breakpoint
->address
& 0xFFFFFFFE,
1211 4, 1, breakpoint
->orig_instr
);
1212 if (retval
!= ERROR_OK
)
1217 retval
= target
->type
->write_memory(target
,
1218 breakpoint
->address
& 0xFFFFFFFE,
1219 2, 1, breakpoint
->orig_instr
);
1220 if (retval
!= ERROR_OK
)
1224 breakpoint
->set
= 0;
1229 static int cortex_a8_add_breakpoint(struct target
*target
,
1230 struct breakpoint
*breakpoint
)
1232 struct cortex_a8_common
*cortex_a8
= target_to_cortex_a8(target
);
1234 if ((breakpoint
->type
== BKPT_HARD
) && (cortex_a8
->brp_num_available
< 1))
1236 LOG_INFO("no hardware breakpoint available");
1237 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
1240 if (breakpoint
->type
== BKPT_HARD
)
1241 cortex_a8
->brp_num_available
--;
1242 cortex_a8_set_breakpoint(target
, breakpoint
, 0x00); /* Exact match */
1247 static int cortex_a8_remove_breakpoint(struct target
*target
, struct breakpoint
*breakpoint
)
1249 struct cortex_a8_common
*cortex_a8
= target_to_cortex_a8(target
);
1252 /* It is perfectly possible to remove brakpoints while the taget is running */
1253 if (target
->state
!= TARGET_HALTED
)
1255 LOG_WARNING("target not halted");
1256 return ERROR_TARGET_NOT_HALTED
;
1260 if (breakpoint
->set
)
1262 cortex_a8_unset_breakpoint(target
, breakpoint
);
1263 if (breakpoint
->type
== BKPT_HARD
)
1264 cortex_a8
->brp_num_available
++ ;
1274 * Cortex-A8 Reset fuctions
1277 static int cortex_a8_assert_reset(struct target
*target
)
1279 struct armv7a_common
*armv7a
= target_to_armv7a(target
);
1283 /* FIXME when halt is requested, make it work somehow... */
1285 /* Issue some kind of warm reset. */
1286 if (target_has_event_action(target
, TARGET_EVENT_RESET_ASSERT
)) {
1287 target_handle_event(target
, TARGET_EVENT_RESET_ASSERT
);
1288 } else if (jtag_get_reset_config() & RESET_HAS_SRST
) {
1289 /* REVISIT handle "pulls" cases, if there's
1290 * hardware that needs them to work.
1292 jtag_add_reset(0, 1);
1294 LOG_ERROR("%s: how to reset?", target_name(target
));
1298 /* registers are now invalid */
1299 register_cache_invalidate(armv7a
->armv4_5_common
.core_cache
);
1301 target
->state
= TARGET_RESET
;
1306 static int cortex_a8_deassert_reset(struct target
*target
)
1312 /* be certain SRST is off */
1313 jtag_add_reset(0, 0);
1315 retval
= cortex_a8_poll(target
);
1317 if (target
->reset_halt
) {
1318 if (target
->state
!= TARGET_HALTED
) {
1319 LOG_WARNING("%s: ran after reset and before halt ...",
1320 target_name(target
));
1321 if ((retval
= target_halt(target
)) != ERROR_OK
)
1330 * Cortex-A8 Memory access
1332 * This is same Cortex M3 but we must also use the correct
1333 * ap number for every access.
1336 static int cortex_a8_read_phys_memory(struct target
*target
,
1337 uint32_t address
, uint32_t size
,
1338 uint32_t count
, uint8_t *buffer
)
1340 struct armv7a_common
*armv7a
= target_to_armv7a(target
);
1341 struct adiv5_dap
*swjdp
= &armv7a
->dap
;
1342 int retval
= ERROR_INVALID_ARGUMENTS
;
1344 /* cortex_a8 handles unaligned memory access */
1346 // ??? dap_ap_select(swjdp, swjdp_memoryap);
1347 LOG_DEBUG("Reading memory at real address 0x%x; size %d; count %d", address
, size
, count
);
1348 if (count
&& buffer
) {
1351 retval
= mem_ap_read_buf_u32(swjdp
, buffer
, 4 * count
, address
);
1354 retval
= mem_ap_read_buf_u16(swjdp
, buffer
, 2 * count
, address
);
1357 retval
= mem_ap_read_buf_u8(swjdp
, buffer
, count
, address
);
1365 static int cortex_a8_read_memory(struct target
*target
, uint32_t address
,
1366 uint32_t size
, uint32_t count
, uint8_t *buffer
)
1369 uint32_t virt
, phys
;
1371 /* cortex_a8 handles unaligned memory access */
1373 // ??? dap_ap_select(swjdp, swjdp_memoryap);
1374 LOG_DEBUG("Reading memory at address 0x%x; size %d; count %d", address
, size
, count
);
1375 cortex_a8_mmu(target
, &enabled
);
1379 cortex_a8_virt2phys(target
, virt
, &phys
);
1380 LOG_DEBUG("Reading at virtual address. Translating v:0x%x to r:0x%x", virt
, phys
);
1384 return cortex_a8_read_phys_memory(target
, address
, size
, count
, buffer
);
1387 static int cortex_a8_write_phys_memory(struct target
*target
,
1388 uint32_t address
, uint32_t size
,
1389 uint32_t count
, uint8_t *buffer
)
1391 struct armv7a_common
*armv7a
= target_to_armv7a(target
);
1392 struct adiv5_dap
*swjdp
= &armv7a
->dap
;
1393 int retval
= ERROR_INVALID_ARGUMENTS
;
1395 // ??? dap_ap_select(swjdp, swjdp_memoryap);
1397 LOG_DEBUG("Writing memory to real address 0x%x; size %d; count %d", address
, size
, count
);
1398 if (count
&& buffer
) {
1401 retval
= mem_ap_write_buf_u32(swjdp
, buffer
, 4 * count
, address
);
1404 retval
= mem_ap_write_buf_u16(swjdp
, buffer
, 2 * count
, address
);
1407 retval
= mem_ap_write_buf_u8(swjdp
, buffer
, count
, address
);
1412 /* REVISIT this op is generic ARMv7-A/R stuff */
1413 if (retval
== ERROR_OK
&& target
->state
== TARGET_HALTED
)
1415 struct arm_dpm
*dpm
= armv7a
->armv4_5_common
.dpm
;
1417 retval
= dpm
->prepare(dpm
);
1418 if (retval
!= ERROR_OK
)
1421 /* The Cache handling will NOT work with MMU active, the
1422 * wrong addresses will be invalidated!
1424 * For both ICache and DCache, walk all cache lines in the
1425 * address range. Cortex-A8 has fixed 64 byte line length.
1427 * REVISIT per ARMv7, these may trigger watchpoints ...
1430 /* invalidate I-Cache */
1431 if (armv7a
->armv4_5_mmu
.armv4_5_cache
.i_cache_enabled
)
1433 /* ICIMVAU - Invalidate Cache single entry
1435 * MCR p15, 0, r0, c7, c5, 1
1437 for (uint32_t cacheline
= address
;
1438 cacheline
< address
+ size
* count
;
1440 retval
= dpm
->instr_write_data_r0(dpm
,
1441 ARMV4_5_MCR(15, 0, 0, 7, 5, 1),
1446 /* invalidate D-Cache */
1447 if (armv7a
->armv4_5_mmu
.armv4_5_cache
.d_u_cache_enabled
)
1449 /* DCIMVAC - Invalidate data Cache line
1451 * MCR p15, 0, r0, c7, c6, 1
1453 for (uint32_t cacheline
= address
;
1454 cacheline
< address
+ size
* count
;
1456 retval
= dpm
->instr_write_data_r0(dpm
,
1457 ARMV4_5_MCR(15, 0, 0, 7, 6, 1),
1462 /* (void) */ dpm
->finish(dpm
);
1468 static int cortex_a8_write_memory(struct target
*target
, uint32_t address
,
1469 uint32_t size
, uint32_t count
, uint8_t *buffer
)
1472 uint32_t virt
, phys
;
1474 // ??? dap_ap_select(swjdp, swjdp_memoryap);
1476 LOG_DEBUG("Writing memory to address 0x%x; size %d; count %d", address
, size
, count
);
1477 cortex_a8_mmu(target
, &enabled
);
1481 cortex_a8_virt2phys(target
, virt
, &phys
);
1482 LOG_DEBUG("Writing to virtual address. Translating v:0x%x to r:0x%x", virt
, phys
);
1486 return cortex_a8_write_phys_memory(target
, address
, size
,
1490 static int cortex_a8_bulk_write_memory(struct target
*target
, uint32_t address
,
1491 uint32_t count
, uint8_t *buffer
)
1493 return cortex_a8_write_memory(target
, address
, 4, count
, buffer
);
1497 static int cortex_a8_dcc_read(struct adiv5_dap
*swjdp
, uint8_t *value
, uint8_t *ctrl
)
1502 mem_ap_read_buf_u16(swjdp
, (uint8_t*)&dcrdr
, 1, DCB_DCRDR
);
1503 *ctrl
= (uint8_t)dcrdr
;
1504 *value
= (uint8_t)(dcrdr
>> 8);
1506 LOG_DEBUG("data 0x%x ctrl 0x%x", *value
, *ctrl
);
1508 /* write ack back to software dcc register
1509 * signify we have read data */
1510 if (dcrdr
& (1 << 0))
1513 mem_ap_write_buf_u16(swjdp
, (uint8_t*)&dcrdr
, 1, DCB_DCRDR
);
1520 static int cortex_a8_handle_target_request(void *priv
)
1522 struct target
*target
= priv
;
1523 struct armv7a_common
*armv7a
= target_to_armv7a(target
);
1524 struct adiv5_dap
*swjdp
= &armv7a
->dap
;
1526 if (!target_was_examined(target
))
1528 if (!target
->dbg_msg_enabled
)
1531 if (target
->state
== TARGET_RUNNING
)
1536 cortex_a8_dcc_read(swjdp
, &data
, &ctrl
);
1538 /* check if we have data */
1539 if (ctrl
& (1 << 0))
1543 /* we assume target is quick enough */
1545 cortex_a8_dcc_read(swjdp
, &data
, &ctrl
);
1546 request
|= (data
<< 8);
1547 cortex_a8_dcc_read(swjdp
, &data
, &ctrl
);
1548 request
|= (data
<< 16);
1549 cortex_a8_dcc_read(swjdp
, &data
, &ctrl
);
1550 request
|= (data
<< 24);
1551 target_request(target
, request
);
1559 * Cortex-A8 target information and configuration
1562 static int cortex_a8_examine_first(struct target
*target
)
1564 struct cortex_a8_common
*cortex_a8
= target_to_cortex_a8(target
);
1565 struct armv7a_common
*armv7a
= &cortex_a8
->armv7a_common
;
1566 struct adiv5_dap
*swjdp
= &armv7a
->dap
;
1568 int retval
= ERROR_OK
;
1569 uint32_t didr
, ctypr
, ttypr
, cpuid
;
1571 /* stop assuming this is an OMAP! */
1572 LOG_DEBUG("TODO - autoconfigure");
1574 /* Here we shall insert a proper ROM Table scan */
1575 armv7a
->debug_base
= OMAP3530_DEBUG_BASE
;
1577 /* We do one extra read to ensure DAP is configured,
1578 * we call ahbap_debugport_init(swjdp) instead
1580 retval
= ahbap_debugport_init(swjdp
);
1581 if (retval
!= ERROR_OK
)
1584 retval
= mem_ap_read_atomic_u32(swjdp
, armv7a
->debug_base
+ CPUDBG_CPUID
, &cpuid
);
1585 if (retval
!= ERROR_OK
)
1588 if ((retval
= mem_ap_read_atomic_u32(swjdp
,
1589 armv7a
->debug_base
+ CPUDBG_CPUID
, &cpuid
)) != ERROR_OK
)
1591 LOG_DEBUG("Examine %s failed", "CPUID");
1595 if ((retval
= mem_ap_read_atomic_u32(swjdp
,
1596 armv7a
->debug_base
+ CPUDBG_CTYPR
, &ctypr
)) != ERROR_OK
)
1598 LOG_DEBUG("Examine %s failed", "CTYPR");
1602 if ((retval
= mem_ap_read_atomic_u32(swjdp
,
1603 armv7a
->debug_base
+ CPUDBG_TTYPR
, &ttypr
)) != ERROR_OK
)
1605 LOG_DEBUG("Examine %s failed", "TTYPR");
1609 if ((retval
= mem_ap_read_atomic_u32(swjdp
,
1610 armv7a
->debug_base
+ CPUDBG_DIDR
, &didr
)) != ERROR_OK
)
1612 LOG_DEBUG("Examine %s failed", "DIDR");
1616 LOG_DEBUG("cpuid = 0x%08" PRIx32
, cpuid
);
1617 LOG_DEBUG("ctypr = 0x%08" PRIx32
, ctypr
);
1618 LOG_DEBUG("ttypr = 0x%08" PRIx32
, ttypr
);
1619 LOG_DEBUG("didr = 0x%08" PRIx32
, didr
);
1621 armv7a
->armv4_5_common
.core_type
= ARM_MODE_MON
;
1622 retval
= cortex_a8_dpm_setup(cortex_a8
, didr
);
1623 if (retval
!= ERROR_OK
)
1626 /* Setup Breakpoint Register Pairs */
1627 cortex_a8
->brp_num
= ((didr
>> 24) & 0x0F) + 1;
1628 cortex_a8
->brp_num_context
= ((didr
>> 20) & 0x0F) + 1;
1629 cortex_a8
->brp_num_available
= cortex_a8
->brp_num
;
1630 cortex_a8
->brp_list
= calloc(cortex_a8
->brp_num
, sizeof(struct cortex_a8_brp
));
1631 // cortex_a8->brb_enabled = ????;
1632 for (i
= 0; i
< cortex_a8
->brp_num
; i
++)
1634 cortex_a8
->brp_list
[i
].used
= 0;
1635 if (i
< (cortex_a8
->brp_num
-cortex_a8
->brp_num_context
))
1636 cortex_a8
->brp_list
[i
].type
= BRP_NORMAL
;
1638 cortex_a8
->brp_list
[i
].type
= BRP_CONTEXT
;
1639 cortex_a8
->brp_list
[i
].value
= 0;
1640 cortex_a8
->brp_list
[i
].control
= 0;
1641 cortex_a8
->brp_list
[i
].BRPn
= i
;
1644 LOG_DEBUG("Configured %i hw breakpoints", cortex_a8
->brp_num
);
1646 target_set_examined(target
);
1650 static int cortex_a8_examine(struct target
*target
)
1652 int retval
= ERROR_OK
;
1654 /* don't re-probe hardware after each reset */
1655 if (!target_was_examined(target
))
1656 retval
= cortex_a8_examine_first(target
);
1658 /* Configure core debug access */
1659 if (retval
== ERROR_OK
)
1660 retval
= cortex_a8_init_debug_access(target
);
1666 * Cortex-A8 target creation and initialization
1669 static int cortex_a8_init_target(struct command_context
*cmd_ctx
,
1670 struct target
*target
)
1672 /* examine_first() does a bunch of this */
1676 static int cortex_a8_init_arch_info(struct target
*target
,
1677 struct cortex_a8_common
*cortex_a8
, struct jtag_tap
*tap
)
1679 struct armv7a_common
*armv7a
= &cortex_a8
->armv7a_common
;
1680 struct arm
*armv4_5
= &armv7a
->armv4_5_common
;
1681 struct adiv5_dap
*dap
= &armv7a
->dap
;
1683 armv7a
->armv4_5_common
.dap
= dap
;
1685 /* Setup struct cortex_a8_common */
1686 cortex_a8
->common_magic
= CORTEX_A8_COMMON_MAGIC
;
1687 armv4_5
->arch_info
= armv7a
;
1689 /* prepare JTAG information for the new target */
1690 cortex_a8
->jtag_info
.tap
= tap
;
1691 cortex_a8
->jtag_info
.scann_size
= 4;
1693 /* Leave (only) generic DAP stuff for debugport_init() */
1694 dap
->jtag_info
= &cortex_a8
->jtag_info
;
1695 dap
->memaccess_tck
= 80;
1697 /* Number of bits for tar autoincrement, impl. dep. at least 10 */
1698 dap
->tar_autoincr_block
= (1 << 10);
1700 cortex_a8
->fast_reg_read
= 0;
1702 /* Set default value */
1703 cortex_a8
->current_address_mode
= ARM_MODE_ANY
;
1705 /* register arch-specific functions */
1706 armv7a
->examine_debug_reason
= NULL
;
1708 armv7a
->post_debug_entry
= cortex_a8_post_debug_entry
;
1710 armv7a
->pre_restore_context
= NULL
;
1711 armv7a
->armv4_5_mmu
.armv4_5_cache
.ctype
= -1;
1712 armv7a
->armv4_5_mmu
.get_ttb
= cortex_a8_get_ttb
;
1713 armv7a
->armv4_5_mmu
.read_memory
= cortex_a8_read_phys_memory
;
1714 armv7a
->armv4_5_mmu
.write_memory
= cortex_a8_write_phys_memory
;
1715 armv7a
->armv4_5_mmu
.disable_mmu_caches
= cortex_a8_disable_mmu_caches
;
1716 armv7a
->armv4_5_mmu
.enable_mmu_caches
= cortex_a8_enable_mmu_caches
;
1717 armv7a
->armv4_5_mmu
.has_tiny_pages
= 1;
1718 armv7a
->armv4_5_mmu
.mmu_enabled
= 0;
1721 // arm7_9->handle_target_request = cortex_a8_handle_target_request;
1723 /* REVISIT v7a setup should be in a v7a-specific routine */
1724 arm_init_arch_info(target
, armv4_5
);
1725 armv7a
->common_magic
= ARMV7_COMMON_MAGIC
;
1727 target_register_timer_callback(cortex_a8_handle_target_request
, 1, 1, target
);
1732 static int cortex_a8_target_create(struct target
*target
, Jim_Interp
*interp
)
1734 struct cortex_a8_common
*cortex_a8
= calloc(1, sizeof(struct cortex_a8_common
));
1736 cortex_a8_init_arch_info(target
, cortex_a8
, target
->tap
);
1741 static uint32_t cortex_a8_get_ttb(struct target
*target
)
1743 struct cortex_a8_common
*cortex_a8
= target_to_cortex_a8(target
);
1744 struct armv7a_common
*armv7a
= &cortex_a8
->armv7a_common
;
1745 uint32_t ttb
= 0, retval
= ERROR_OK
;
1747 /* current_address_mode is set inside cortex_a8_virt2phys()
1748 where we can determine if address belongs to user or kernel */
1749 if(cortex_a8
->current_address_mode
== ARM_MODE_SVC
)
1751 /* MRC p15,0,<Rt>,c1,c0,0 ; Read CP15 System Control Register */
1752 retval
= armv7a
->armv4_5_common
.mrc(target
, 15,
1753 0, 1, /* op1, op2 */
1754 2, 0, /* CRn, CRm */
1757 else if(cortex_a8
->current_address_mode
== ARM_MODE_USR
)
1759 /* MRC p15,0,<Rt>,c1,c0,0 ; Read CP15 System Control Register */
1760 retval
= armv7a
->armv4_5_common
.mrc(target
, 15,
1761 0, 0, /* op1, op2 */
1762 2, 0, /* CRn, CRm */
1765 /* we don't know whose address is: user or kernel
1766 we assume that if we are in kernel mode then
1767 address belongs to kernel else if in user mode
1769 else if(armv7a
->armv4_5_common
.core_mode
== ARM_MODE_SVC
)
1771 /* MRC p15,0,<Rt>,c1,c0,0 ; Read CP15 System Control Register */
1772 retval
= armv7a
->armv4_5_common
.mrc(target
, 15,
1773 0, 1, /* op1, op2 */
1774 2, 0, /* CRn, CRm */
1777 else if(armv7a
->armv4_5_common
.core_mode
== ARM_MODE_USR
)
1779 /* MRC p15,0,<Rt>,c1,c0,0 ; Read CP15 System Control Register */
1780 retval
= armv7a
->armv4_5_common
.mrc(target
, 15,
1781 0, 0, /* op1, op2 */
1782 2, 0, /* CRn, CRm */
1785 /* finaly we don't know whose ttb to use: user or kernel */
1787 LOG_ERROR("Don't know how to get ttb for current mode!!!");
1794 static void cortex_a8_disable_mmu_caches(struct target
*target
, int mmu
,
1795 int d_u_cache
, int i_cache
)
1797 struct cortex_a8_common
*cortex_a8
= target_to_cortex_a8(target
);
1798 struct armv7a_common
*armv7a
= &cortex_a8
->armv7a_common
;
1799 uint32_t cp15_control
;
1801 /* read cp15 control register */
1802 armv7a
->armv4_5_common
.mrc(target
, 15,
1803 0, 0, /* op1, op2 */
1804 1, 0, /* CRn, CRm */
1809 cp15_control
&= ~0x1U
;
1812 cp15_control
&= ~0x4U
;
1815 cp15_control
&= ~0x1000U
;
1817 armv7a
->armv4_5_common
.mcr(target
, 15,
1818 0, 0, /* op1, op2 */
1819 1, 0, /* CRn, CRm */
1823 static void cortex_a8_enable_mmu_caches(struct target
*target
, int mmu
,
1824 int d_u_cache
, int i_cache
)
1826 struct cortex_a8_common
*cortex_a8
= target_to_cortex_a8(target
);
1827 struct armv7a_common
*armv7a
= &cortex_a8
->armv7a_common
;
1828 uint32_t cp15_control
;
1830 /* read cp15 control register */
1831 armv7a
->armv4_5_common
.mrc(target
, 15,
1832 0, 0, /* op1, op2 */
1833 1, 0, /* CRn, CRm */
1837 cp15_control
|= 0x1U
;
1840 cp15_control
|= 0x4U
;
1843 cp15_control
|= 0x1000U
;
1845 armv7a
->armv4_5_common
.mcr(target
, 15,
1846 0, 0, /* op1, op2 */
1847 1, 0, /* CRn, CRm */
1852 static int cortex_a8_mmu(struct target
*target
, int *enabled
)
1854 if (target
->state
!= TARGET_HALTED
) {
1855 LOG_ERROR("%s: target not halted", __func__
);
1856 return ERROR_TARGET_INVALID
;
1859 *enabled
= target_to_cortex_a8(target
)->armv7a_common
.armv4_5_mmu
.mmu_enabled
;
1863 static int cortex_a8_virt2phys(struct target
*target
,
1864 uint32_t virt
, uint32_t *phys
)
1867 struct cortex_a8_common
*cortex_a8
= target_to_cortex_a8(target
);
1868 // struct armv7a_common *armv7a = &cortex_a8->armv7a_common;
1869 struct armv7a_common
*armv7a
= target_to_armv7a(target
);
1871 /* We assume that virtual address is separated
1872 between user and kernel in Linux style:
1873 0x00000000-0xbfffffff - User space
1874 0xc0000000-0xffffffff - Kernel space */
1875 if( virt
< 0xc0000000 ) /* Linux user space */
1876 cortex_a8
->current_address_mode
= ARM_MODE_USR
;
1877 else /* Linux kernel */
1878 cortex_a8
->current_address_mode
= ARM_MODE_SVC
;
1880 int retval
= armv4_5_mmu_translate_va(target
,
1881 &armv7a
->armv4_5_mmu
, virt
, &cb
, &ret
);
1882 if (retval
!= ERROR_OK
)
1884 /* Reset the flag. We don't want someone else to use it by error */
1885 cortex_a8
->current_address_mode
= ARM_MODE_ANY
;
1891 COMMAND_HANDLER(cortex_a8_handle_cache_info_command
)
1893 struct target
*target
= get_current_target(CMD_CTX
);
1894 struct armv7a_common
*armv7a
= target_to_armv7a(target
);
1896 return armv4_5_handle_cache_info_command(CMD_CTX
,
1897 &armv7a
->armv4_5_mmu
.armv4_5_cache
);
1901 COMMAND_HANDLER(cortex_a8_handle_dbginit_command
)
1903 struct target
*target
= get_current_target(CMD_CTX
);
1904 if (!target_was_examined(target
))
1906 LOG_ERROR("target not examined yet");
1910 return cortex_a8_init_debug_access(target
);
1913 static const struct command_registration cortex_a8_exec_command_handlers
[] = {
1915 .name
= "cache_info",
1916 .handler
= cortex_a8_handle_cache_info_command
,
1917 .mode
= COMMAND_EXEC
,
1918 .help
= "display information about target caches",
1922 .handler
= cortex_a8_handle_dbginit_command
,
1923 .mode
= COMMAND_EXEC
,
1924 .help
= "Initialize core debug",
1926 COMMAND_REGISTRATION_DONE
1928 static const struct command_registration cortex_a8_command_handlers
[] = {
1930 .chain
= arm_command_handlers
,
1933 .chain
= armv7a_command_handlers
,
1936 .name
= "cortex_a8",
1937 .mode
= COMMAND_ANY
,
1938 .help
= "Cortex-A8 command group",
1939 .chain
= cortex_a8_exec_command_handlers
,
1941 COMMAND_REGISTRATION_DONE
1944 struct target_type cortexa8_target
= {
1945 .name
= "cortex_a8",
1947 .poll
= cortex_a8_poll
,
1948 .arch_state
= armv7a_arch_state
,
1950 .target_request_data
= NULL
,
1952 .halt
= cortex_a8_halt
,
1953 .resume
= cortex_a8_resume
,
1954 .step
= cortex_a8_step
,
1956 .assert_reset
= cortex_a8_assert_reset
,
1957 .deassert_reset
= cortex_a8_deassert_reset
,
1958 .soft_reset_halt
= NULL
,
1960 /* REVISIT allow exporting VFP3 registers ... */
1961 .get_gdb_reg_list
= arm_get_gdb_reg_list
,
1963 .read_memory
= cortex_a8_read_memory
,
1964 .write_memory
= cortex_a8_write_memory
,
1965 .bulk_write_memory
= cortex_a8_bulk_write_memory
,
1967 .checksum_memory
= arm_checksum_memory
,
1968 .blank_check_memory
= arm_blank_check_memory
,
1970 .run_algorithm
= armv4_5_run_algorithm
,
1972 .add_breakpoint
= cortex_a8_add_breakpoint
,
1973 .remove_breakpoint
= cortex_a8_remove_breakpoint
,
1974 .add_watchpoint
= NULL
,
1975 .remove_watchpoint
= NULL
,
1977 .commands
= cortex_a8_command_handlers
,
1978 .target_create
= cortex_a8_target_create
,
1979 .init_target
= cortex_a8_init_target
,
1980 .examine
= cortex_a8_examine
,
1982 .read_phys_memory
= cortex_a8_read_phys_memory
,
1983 .write_phys_memory
= cortex_a8_write_phys_memory
,
1984 .mmu
= cortex_a8_mmu
,
1985 .virt2phys
= cortex_a8_virt2phys
,