1 /***************************************************************************
2 * Copyright (C) 2006, 2007 by Dominic Rath *
3 * Dominic.Rath@gmx.de *
5 * Copyright (C) 2007,2008 Øyvind Harboe *
6 * oyvind.harboe@zylin.com *
8 * Copyright (C) 2009 Michael Schwingen *
9 * michael@schwingen.org *
11 * This program is free software; you can redistribute it and/or modify *
12 * it under the terms of the GNU General Public License as published by *
13 * the Free Software Foundation; either version 2 of the License, or *
14 * (at your option) any later version. *
16 * This program is distributed in the hope that it will be useful, *
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
19 * GNU General Public License for more details. *
21 * You should have received a copy of the GNU General Public License *
22 * along with this program; if not, write to the *
23 * Free Software Foundation, Inc., *
24 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
25 ***************************************************************************/
30 #include "breakpoints.h"
32 #include "target_type.h"
34 #include "arm_simulator.h"
35 #include "arm_disassembler.h"
36 #include <helper/time_support.h>
39 #include "arm_opcodes.h"
44 * Important XScale documents available as of October 2009 include:
46 * Intel XScale® Core Developer’s Manual, January 2004
47 * Order Number: 273473-002
48 * This has a chapter detailing debug facilities, and punts some
49 * details to chip-specific microarchitecture documents.
51 * Hot-Debug for Intel XScale® Core Debug White Paper, May 2005
52 * Document Number: 273539-005
53 * Less detailed than the developer's manual, but summarizes those
54 * missing details (for most XScales) and gives LOTS of notes about
55 * debugger/handler interaction issues. Presents a simpler reset
56 * and load-handler sequence than the arch doc. (Note, OpenOCD
57 * doesn't currently support "Hot-Debug" as defined there.)
59 * Chip-specific microarchitecture documents may also be useful.
63 /* forward declarations */
64 static int xscale_resume(struct target
*, int current
,
65 uint32_t address
, int handle_breakpoints
, int debug_execution
);
66 static int xscale_debug_entry(struct target
*);
67 static int xscale_restore_banked(struct target
*);
68 static int xscale_get_reg(struct reg
*reg
);
69 static int xscale_set_reg(struct reg
*reg
, uint8_t *buf
);
70 static int xscale_set_breakpoint(struct target
*, struct breakpoint
*);
71 static int xscale_set_watchpoint(struct target
*, struct watchpoint
*);
72 static int xscale_unset_breakpoint(struct target
*, struct breakpoint
*);
73 static int xscale_read_trace(struct target
*);
76 /* This XScale "debug handler" is loaded into the processor's
77 * mini-ICache, which is 2K of code writable only via JTAG.
79 * FIXME the OpenOCD "bin2char" utility currently doesn't handle
80 * binary files cleanly. It's string oriented, and terminates them
81 * with a NUL character. Better would be to generate the constants
82 * and let other code decide names, scoping, and other housekeeping.
84 static /* unsigned const char xscale_debug_handler[] = ... */
85 #include "xscale_debug.h"
87 static char *const xscale_reg_list
[] =
89 "XSCALE_MAINID", /* 0 */
99 "XSCALE_IBCR0", /* 10 */
109 "XSCALE_RX", /* 20 */
113 static const struct xscale_reg xscale_reg_arch_info
[] =
115 {XSCALE_MAINID
, NULL
},
116 {XSCALE_CACHETYPE
, NULL
},
118 {XSCALE_AUXCTRL
, NULL
},
124 {XSCALE_CPACCESS
, NULL
},
125 {XSCALE_IBCR0
, NULL
},
126 {XSCALE_IBCR1
, NULL
},
129 {XSCALE_DBCON
, NULL
},
130 {XSCALE_TBREG
, NULL
},
131 {XSCALE_CHKPT0
, NULL
},
132 {XSCALE_CHKPT1
, NULL
},
133 {XSCALE_DCSR
, NULL
}, /* DCSR accessed via JTAG or SW */
134 {-1, NULL
}, /* TX accessed via JTAG */
135 {-1, NULL
}, /* RX accessed via JTAG */
136 {-1, NULL
}, /* TXRXCTRL implicit access via JTAG */
139 /* convenience wrapper to access XScale specific registers */
140 static int xscale_set_reg_u32(struct reg
*reg
, uint32_t value
)
144 buf_set_u32(buf
, 0, 32, value
);
146 return xscale_set_reg(reg
, buf
);
149 static const char xscale_not
[] = "target is not an XScale";
151 static int xscale_verify_pointer(struct command_context
*cmd_ctx
,
152 struct xscale_common
*xscale
)
154 if (xscale
->common_magic
!= XSCALE_COMMON_MAGIC
) {
155 command_print(cmd_ctx
, xscale_not
);
156 return ERROR_TARGET_INVALID
;
161 static int xscale_jtag_set_instr(struct jtag_tap
*tap
, uint32_t new_instr
, tap_state_t end_state
)
166 if (buf_get_u32(tap
->cur_instr
, 0, tap
->ir_length
) != new_instr
)
168 struct scan_field field
;
171 memset(&field
, 0, sizeof field
);
172 field
.num_bits
= tap
->ir_length
;
173 field
.out_value
= scratch
;
174 buf_set_u32(scratch
, 0, field
.num_bits
, new_instr
);
176 jtag_add_ir_scan(tap
, &field
, end_state
);
182 static int xscale_read_dcsr(struct target
*target
)
184 struct xscale_common
*xscale
= target_to_xscale(target
);
186 struct scan_field fields
[3];
187 uint8_t field0
= 0x0;
188 uint8_t field0_check_value
= 0x2;
189 uint8_t field0_check_mask
= 0x7;
190 uint8_t field2
= 0x0;
191 uint8_t field2_check_value
= 0x0;
192 uint8_t field2_check_mask
= 0x1;
194 xscale_jtag_set_instr(target
->tap
,
195 XSCALE_SELDCSR
<< xscale
->xscale_variant
,
198 buf_set_u32(&field0
, 1, 1, xscale
->hold_rst
);
199 buf_set_u32(&field0
, 2, 1, xscale
->external_debug_break
);
201 memset(&fields
, 0, sizeof fields
);
203 fields
[0].num_bits
= 3;
204 fields
[0].out_value
= &field0
;
206 fields
[0].in_value
= &tmp
;
208 fields
[1].num_bits
= 32;
209 fields
[1].in_value
= xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].value
;
211 fields
[2].num_bits
= 1;
212 fields
[2].out_value
= &field2
;
214 fields
[2].in_value
= &tmp2
;
216 jtag_add_dr_scan(target
->tap
, 3, fields
, TAP_DRPAUSE
);
218 jtag_check_value_mask(fields
+ 0, &field0_check_value
, &field0_check_mask
);
219 jtag_check_value_mask(fields
+ 2, &field2_check_value
, &field2_check_mask
);
221 if ((retval
= jtag_execute_queue()) != ERROR_OK
)
223 LOG_ERROR("JTAG error while reading DCSR");
227 xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].dirty
= 0;
228 xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].valid
= 1;
230 /* write the register with the value we just read
231 * on this second pass, only the first bit of field0 is guaranteed to be 0)
233 field0_check_mask
= 0x1;
234 fields
[1].out_value
= xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].value
;
235 fields
[1].in_value
= NULL
;
237 jtag_add_dr_scan(target
->tap
, 3, fields
, TAP_DRPAUSE
);
239 /* DANGER!!! this must be here. It will make sure that the arguments
240 * to jtag_set_check_value() does not go out of scope! */
241 return jtag_execute_queue();
245 static void xscale_getbuf(jtag_callback_data_t arg
)
247 uint8_t *in
= (uint8_t *)arg
;
248 *((uint32_t *)in
) = buf_get_u32(in
, 0, 32);
251 static int xscale_receive(struct target
*target
, uint32_t *buffer
, int num_words
)
254 return ERROR_INVALID_ARGUMENTS
;
256 struct xscale_common
*xscale
= target_to_xscale(target
);
257 int retval
= ERROR_OK
;
259 struct scan_field fields
[3];
260 uint8_t *field0
= malloc(num_words
* 1);
261 uint8_t field0_check_value
= 0x2;
262 uint8_t field0_check_mask
= 0x6;
263 uint32_t *field1
= malloc(num_words
* 4);
264 uint8_t field2_check_value
= 0x0;
265 uint8_t field2_check_mask
= 0x1;
267 int words_scheduled
= 0;
270 path
[0] = TAP_DRSELECT
;
271 path
[1] = TAP_DRCAPTURE
;
272 path
[2] = TAP_DRSHIFT
;
274 memset(&fields
, 0, sizeof fields
);
276 fields
[0].num_bits
= 3;
277 fields
[0].check_value
= &field0_check_value
;
278 fields
[0].check_mask
= &field0_check_mask
;
280 fields
[1].num_bits
= 32;
282 fields
[2].num_bits
= 1;
283 fields
[2].check_value
= &field2_check_value
;
284 fields
[2].check_mask
= &field2_check_mask
;
286 xscale_jtag_set_instr(target
->tap
,
287 XSCALE_DBGTX
<< xscale
->xscale_variant
,
289 jtag_add_runtest(1, TAP_IDLE
); /* ensures that we're in the TAP_IDLE state as the above could be a no-op */
291 /* repeat until all words have been collected */
293 while (words_done
< num_words
)
297 for (i
= words_done
; i
< num_words
; i
++)
299 fields
[0].in_value
= &field0
[i
];
301 jtag_add_pathmove(3, path
);
303 fields
[1].in_value
= (uint8_t *)(field1
+ i
);
305 jtag_add_dr_scan_check(target
->tap
, 3, fields
, TAP_IDLE
);
307 jtag_add_callback(xscale_getbuf
, (jtag_callback_data_t
)(field1
+ i
));
312 if ((retval
= jtag_execute_queue()) != ERROR_OK
)
314 LOG_ERROR("JTAG error while receiving data from debug handler");
318 /* examine results */
319 for (i
= words_done
; i
< num_words
; i
++)
321 if (!(field0
[0] & 1))
323 /* move backwards if necessary */
325 for (j
= i
; j
< num_words
- 1; j
++)
327 field0
[j
] = field0
[j
+ 1];
328 field1
[j
] = field1
[j
+ 1];
333 if (words_scheduled
== 0)
335 if (attempts
++==1000)
337 LOG_ERROR("Failed to receiving data from debug handler after 1000 attempts");
338 retval
= ERROR_TARGET_TIMEOUT
;
343 words_done
+= words_scheduled
;
346 for (i
= 0; i
< num_words
; i
++)
347 *(buffer
++) = buf_get_u32((uint8_t*)&field1
[i
], 0, 32);
354 static int xscale_read_tx(struct target
*target
, int consume
)
356 struct xscale_common
*xscale
= target_to_xscale(target
);
358 tap_state_t noconsume_path
[6];
360 struct timeval timeout
, now
;
361 struct scan_field fields
[3];
362 uint8_t field0_in
= 0x0;
363 uint8_t field0_check_value
= 0x2;
364 uint8_t field0_check_mask
= 0x6;
365 uint8_t field2_check_value
= 0x0;
366 uint8_t field2_check_mask
= 0x1;
368 xscale_jtag_set_instr(target
->tap
,
369 XSCALE_DBGTX
<< xscale
->xscale_variant
,
372 path
[0] = TAP_DRSELECT
;
373 path
[1] = TAP_DRCAPTURE
;
374 path
[2] = TAP_DRSHIFT
;
376 noconsume_path
[0] = TAP_DRSELECT
;
377 noconsume_path
[1] = TAP_DRCAPTURE
;
378 noconsume_path
[2] = TAP_DREXIT1
;
379 noconsume_path
[3] = TAP_DRPAUSE
;
380 noconsume_path
[4] = TAP_DREXIT2
;
381 noconsume_path
[5] = TAP_DRSHIFT
;
383 memset(&fields
, 0, sizeof fields
);
385 fields
[0].num_bits
= 3;
386 fields
[0].in_value
= &field0_in
;
388 fields
[1].num_bits
= 32;
389 fields
[1].in_value
= xscale
->reg_cache
->reg_list
[XSCALE_TX
].value
;
391 fields
[2].num_bits
= 1;
393 fields
[2].in_value
= &tmp
;
395 gettimeofday(&timeout
, NULL
);
396 timeval_add_time(&timeout
, 1, 0);
400 /* if we want to consume the register content (i.e. clear TX_READY),
401 * we have to go straight from Capture-DR to Shift-DR
402 * otherwise, we go from Capture-DR to Exit1-DR to Pause-DR
405 jtag_add_pathmove(3, path
);
408 jtag_add_pathmove(ARRAY_SIZE(noconsume_path
), noconsume_path
);
411 jtag_add_dr_scan(target
->tap
, 3, fields
, TAP_IDLE
);
413 jtag_check_value_mask(fields
+ 0, &field0_check_value
, &field0_check_mask
);
414 jtag_check_value_mask(fields
+ 2, &field2_check_value
, &field2_check_mask
);
416 if ((retval
= jtag_execute_queue()) != ERROR_OK
)
418 LOG_ERROR("JTAG error while reading TX");
419 return ERROR_TARGET_TIMEOUT
;
422 gettimeofday(&now
, NULL
);
423 if ((now
.tv_sec
> timeout
.tv_sec
) || ((now
.tv_sec
== timeout
.tv_sec
)&& (now
.tv_usec
> timeout
.tv_usec
)))
425 LOG_ERROR("time out reading TX register");
426 return ERROR_TARGET_TIMEOUT
;
428 if (!((!(field0_in
& 1)) && consume
))
432 if (debug_level
>= 3)
434 LOG_DEBUG("waiting 100ms");
435 alive_sleep(100); /* avoid flooding the logs */
443 if (!(field0_in
& 1))
444 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
449 static int xscale_write_rx(struct target
*target
)
451 struct xscale_common
*xscale
= target_to_xscale(target
);
453 struct timeval timeout
, now
;
454 struct scan_field fields
[3];
455 uint8_t field0_out
= 0x0;
456 uint8_t field0_in
= 0x0;
457 uint8_t field0_check_value
= 0x2;
458 uint8_t field0_check_mask
= 0x6;
459 uint8_t field2
= 0x0;
460 uint8_t field2_check_value
= 0x0;
461 uint8_t field2_check_mask
= 0x1;
463 xscale_jtag_set_instr(target
->tap
,
464 XSCALE_DBGRX
<< xscale
->xscale_variant
,
467 memset(&fields
, 0, sizeof fields
);
469 fields
[0].num_bits
= 3;
470 fields
[0].out_value
= &field0_out
;
471 fields
[0].in_value
= &field0_in
;
473 fields
[1].num_bits
= 32;
474 fields
[1].out_value
= xscale
->reg_cache
->reg_list
[XSCALE_RX
].value
;
476 fields
[2].num_bits
= 1;
477 fields
[2].out_value
= &field2
;
479 fields
[2].in_value
= &tmp
;
481 gettimeofday(&timeout
, NULL
);
482 timeval_add_time(&timeout
, 1, 0);
484 /* poll until rx_read is low */
485 LOG_DEBUG("polling RX");
488 jtag_add_dr_scan(target
->tap
, 3, fields
, TAP_IDLE
);
490 jtag_check_value_mask(fields
+ 0, &field0_check_value
, &field0_check_mask
);
491 jtag_check_value_mask(fields
+ 2, &field2_check_value
, &field2_check_mask
);
493 if ((retval
= jtag_execute_queue()) != ERROR_OK
)
495 LOG_ERROR("JTAG error while writing RX");
499 gettimeofday(&now
, NULL
);
500 if ((now
.tv_sec
> timeout
.tv_sec
) || ((now
.tv_sec
== timeout
.tv_sec
)&& (now
.tv_usec
> timeout
.tv_usec
)))
502 LOG_ERROR("time out writing RX register");
503 return ERROR_TARGET_TIMEOUT
;
505 if (!(field0_in
& 1))
507 if (debug_level
>= 3)
509 LOG_DEBUG("waiting 100ms");
510 alive_sleep(100); /* avoid flooding the logs */
520 jtag_add_dr_scan(target
->tap
, 3, fields
, TAP_IDLE
);
522 if ((retval
= jtag_execute_queue()) != ERROR_OK
)
524 LOG_ERROR("JTAG error while writing RX");
531 /* send count elements of size byte to the debug handler */
532 static int xscale_send(struct target
*target
, uint8_t *buffer
, int count
, int size
)
534 struct xscale_common
*xscale
= target_to_xscale(target
);
540 xscale_jtag_set_instr(target
->tap
,
541 XSCALE_DBGRX
<< xscale
->xscale_variant
,
549 int endianness
= target
->endianness
;
550 while (done_count
++ < count
)
555 if (endianness
== TARGET_LITTLE_ENDIAN
)
557 t
[1]=le_to_h_u32(buffer
);
560 t
[1]=be_to_h_u32(buffer
);
564 if (endianness
== TARGET_LITTLE_ENDIAN
)
566 t
[1]=le_to_h_u16(buffer
);
569 t
[1]=be_to_h_u16(buffer
);
576 LOG_ERROR("BUG: size neither 4, 2 nor 1");
577 return ERROR_INVALID_ARGUMENTS
;
579 jtag_add_dr_out(target
->tap
,
587 if ((retval
= jtag_execute_queue()) != ERROR_OK
)
589 LOG_ERROR("JTAG error while sending data to debug handler");
596 static int xscale_send_u32(struct target
*target
, uint32_t value
)
598 struct xscale_common
*xscale
= target_to_xscale(target
);
600 buf_set_u32(xscale
->reg_cache
->reg_list
[XSCALE_RX
].value
, 0, 32, value
);
601 return xscale_write_rx(target
);
604 static int xscale_write_dcsr(struct target
*target
, int hold_rst
, int ext_dbg_brk
)
606 struct xscale_common
*xscale
= target_to_xscale(target
);
608 struct scan_field fields
[3];
609 uint8_t field0
= 0x0;
610 uint8_t field0_check_value
= 0x2;
611 uint8_t field0_check_mask
= 0x7;
612 uint8_t field2
= 0x0;
613 uint8_t field2_check_value
= 0x0;
614 uint8_t field2_check_mask
= 0x1;
617 xscale
->hold_rst
= hold_rst
;
619 if (ext_dbg_brk
!= -1)
620 xscale
->external_debug_break
= ext_dbg_brk
;
622 xscale_jtag_set_instr(target
->tap
,
623 XSCALE_SELDCSR
<< xscale
->xscale_variant
,
626 buf_set_u32(&field0
, 1, 1, xscale
->hold_rst
);
627 buf_set_u32(&field0
, 2, 1, xscale
->external_debug_break
);
629 memset(&fields
, 0, sizeof fields
);
631 fields
[0].num_bits
= 3;
632 fields
[0].out_value
= &field0
;
634 fields
[0].in_value
= &tmp
;
636 fields
[1].num_bits
= 32;
637 fields
[1].out_value
= xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].value
;
639 fields
[2].num_bits
= 1;
640 fields
[2].out_value
= &field2
;
642 fields
[2].in_value
= &tmp2
;
644 jtag_add_dr_scan(target
->tap
, 3, fields
, TAP_IDLE
);
646 jtag_check_value_mask(fields
+ 0, &field0_check_value
, &field0_check_mask
);
647 jtag_check_value_mask(fields
+ 2, &field2_check_value
, &field2_check_mask
);
649 if ((retval
= jtag_execute_queue()) != ERROR_OK
)
651 LOG_ERROR("JTAG error while writing DCSR");
655 xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].dirty
= 0;
656 xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].valid
= 1;
661 /* parity of the number of bits 0 if even; 1 if odd. for 32 bit words */
662 static unsigned int parity (unsigned int v
)
664 // unsigned int ov = v;
669 // LOG_DEBUG("parity of 0x%x is %i", ov, (0x6996 >> v) & 1);
670 return (0x6996 >> v
) & 1;
673 static int xscale_load_ic(struct target
*target
, uint32_t va
, uint32_t buffer
[8])
675 struct xscale_common
*xscale
= target_to_xscale(target
);
679 struct scan_field fields
[2];
681 LOG_DEBUG("loading miniIC at 0x%8.8" PRIx32
"", va
);
684 xscale_jtag_set_instr(target
->tap
,
685 XSCALE_LDIC
<< xscale
->xscale_variant
,
688 /* CMD is b011 to load a cacheline into the Mini ICache.
689 * Loading into the main ICache is deprecated, and unused.
690 * It's followed by three zero bits, and 27 address bits.
692 buf_set_u32(&cmd
, 0, 6, 0x3);
694 /* virtual address of desired cache line */
695 buf_set_u32(packet
, 0, 27, va
>> 5);
697 memset(&fields
, 0, sizeof fields
);
699 fields
[0].num_bits
= 6;
700 fields
[0].out_value
= &cmd
;
702 fields
[1].num_bits
= 27;
703 fields
[1].out_value
= packet
;
705 jtag_add_dr_scan(target
->tap
, 2, fields
, TAP_IDLE
);
707 /* rest of packet is a cacheline: 8 instructions, with parity */
708 fields
[0].num_bits
= 32;
709 fields
[0].out_value
= packet
;
711 fields
[1].num_bits
= 1;
712 fields
[1].out_value
= &cmd
;
714 for (word
= 0; word
< 8; word
++)
716 buf_set_u32(packet
, 0, 32, buffer
[word
]);
719 memcpy(&value
, packet
, sizeof(uint32_t));
722 jtag_add_dr_scan(target
->tap
, 2, fields
, TAP_IDLE
);
725 return jtag_execute_queue();
728 static int xscale_invalidate_ic_line(struct target
*target
, uint32_t va
)
730 struct xscale_common
*xscale
= target_to_xscale(target
);
733 struct scan_field fields
[2];
735 xscale_jtag_set_instr(target
->tap
,
736 XSCALE_LDIC
<< xscale
->xscale_variant
,
739 /* CMD for invalidate IC line b000, bits [6:4] b000 */
740 buf_set_u32(&cmd
, 0, 6, 0x0);
742 /* virtual address of desired cache line */
743 buf_set_u32(packet
, 0, 27, va
>> 5);
745 memset(&fields
, 0, sizeof fields
);
747 fields
[0].num_bits
= 6;
748 fields
[0].out_value
= &cmd
;
750 fields
[1].num_bits
= 27;
751 fields
[1].out_value
= packet
;
753 jtag_add_dr_scan(target
->tap
, 2, fields
, TAP_IDLE
);
758 static int xscale_update_vectors(struct target
*target
)
760 struct xscale_common
*xscale
= target_to_xscale(target
);
764 uint32_t low_reset_branch
, high_reset_branch
;
766 for (i
= 1; i
< 8; i
++)
768 /* if there's a static vector specified for this exception, override */
769 if (xscale
->static_high_vectors_set
& (1 << i
))
771 xscale
->high_vectors
[i
] = xscale
->static_high_vectors
[i
];
775 retval
= target_read_u32(target
, 0xffff0000 + 4*i
, &xscale
->high_vectors
[i
]);
776 if (retval
== ERROR_TARGET_TIMEOUT
)
778 if (retval
!= ERROR_OK
)
780 /* Some of these reads will fail as part of normal execution */
781 xscale
->high_vectors
[i
] = ARMV4_5_B(0xfffffe, 0);
786 for (i
= 1; i
< 8; i
++)
788 if (xscale
->static_low_vectors_set
& (1 << i
))
790 xscale
->low_vectors
[i
] = xscale
->static_low_vectors
[i
];
794 retval
= target_read_u32(target
, 0x0 + 4*i
, &xscale
->low_vectors
[i
]);
795 if (retval
== ERROR_TARGET_TIMEOUT
)
797 if (retval
!= ERROR_OK
)
799 /* Some of these reads will fail as part of normal execution */
800 xscale
->low_vectors
[i
] = ARMV4_5_B(0xfffffe, 0);
805 /* calculate branches to debug handler */
806 low_reset_branch
= (xscale
->handler_address
+ 0x20 - 0x0 - 0x8) >> 2;
807 high_reset_branch
= (xscale
->handler_address
+ 0x20 - 0xffff0000 - 0x8) >> 2;
809 xscale
->low_vectors
[0] = ARMV4_5_B((low_reset_branch
& 0xffffff), 0);
810 xscale
->high_vectors
[0] = ARMV4_5_B((high_reset_branch
& 0xffffff), 0);
812 /* invalidate and load exception vectors in mini i-cache */
813 xscale_invalidate_ic_line(target
, 0x0);
814 xscale_invalidate_ic_line(target
, 0xffff0000);
816 xscale_load_ic(target
, 0x0, xscale
->low_vectors
);
817 xscale_load_ic(target
, 0xffff0000, xscale
->high_vectors
);
822 static int xscale_arch_state(struct target
*target
)
824 struct xscale_common
*xscale
= target_to_xscale(target
);
825 struct arm
*armv4_5
= &xscale
->armv4_5_common
;
827 static const char *state
[] =
829 "disabled", "enabled"
832 static const char *arch_dbg_reason
[] =
834 "", "\n(processor reset)", "\n(trace buffer full)"
837 if (armv4_5
->common_magic
!= ARM_COMMON_MAGIC
)
839 LOG_ERROR("BUG: called for a non-ARMv4/5 target");
840 return ERROR_INVALID_ARGUMENTS
;
843 arm_arch_state(target
);
844 LOG_USER("MMU: %s, D-Cache: %s, I-Cache: %s%s",
845 state
[xscale
->armv4_5_mmu
.mmu_enabled
],
846 state
[xscale
->armv4_5_mmu
.armv4_5_cache
.d_u_cache_enabled
],
847 state
[xscale
->armv4_5_mmu
.armv4_5_cache
.i_cache_enabled
],
848 arch_dbg_reason
[xscale
->arch_debug_reason
]);
853 static int xscale_poll(struct target
*target
)
855 int retval
= ERROR_OK
;
857 if ((target
->state
== TARGET_RUNNING
) || (target
->state
== TARGET_DEBUG_RUNNING
))
859 enum target_state previous_state
= target
->state
;
860 if ((retval
= xscale_read_tx(target
, 0)) == ERROR_OK
)
863 /* there's data to read from the tx register, we entered debug state */
864 target
->state
= TARGET_HALTED
;
866 /* process debug entry, fetching current mode regs */
867 retval
= xscale_debug_entry(target
);
869 else if (retval
!= ERROR_TARGET_RESOURCE_NOT_AVAILABLE
)
871 LOG_USER("error while polling TX register, reset CPU");
872 /* here we "lie" so GDB won't get stuck and a reset can be perfomed */
873 target
->state
= TARGET_HALTED
;
876 /* debug_entry could have overwritten target state (i.e. immediate resume)
877 * don't signal event handlers in that case
879 if (target
->state
!= TARGET_HALTED
)
882 /* if target was running, signal that we halted
883 * otherwise we reentered from debug execution */
884 if (previous_state
== TARGET_RUNNING
)
885 target_call_event_callbacks(target
, TARGET_EVENT_HALTED
);
887 target_call_event_callbacks(target
, TARGET_EVENT_DEBUG_HALTED
);
893 static int xscale_debug_entry(struct target
*target
)
895 struct xscale_common
*xscale
= target_to_xscale(target
);
896 struct arm
*armv4_5
= &xscale
->armv4_5_common
;
903 /* clear external dbg break (will be written on next DCSR read) */
904 xscale
->external_debug_break
= 0;
905 if ((retval
= xscale_read_dcsr(target
)) != ERROR_OK
)
908 /* get r0, pc, r1 to r7 and cpsr */
909 if ((retval
= xscale_receive(target
, buffer
, 10)) != ERROR_OK
)
912 /* move r0 from buffer to register cache */
913 buf_set_u32(armv4_5
->core_cache
->reg_list
[0].value
, 0, 32, buffer
[0]);
914 armv4_5
->core_cache
->reg_list
[0].dirty
= 1;
915 armv4_5
->core_cache
->reg_list
[0].valid
= 1;
916 LOG_DEBUG("r0: 0x%8.8" PRIx32
"", buffer
[0]);
918 /* move pc from buffer to register cache */
919 buf_set_u32(armv4_5
->pc
->value
, 0, 32, buffer
[1]);
920 armv4_5
->pc
->dirty
= 1;
921 armv4_5
->pc
->valid
= 1;
922 LOG_DEBUG("pc: 0x%8.8" PRIx32
"", buffer
[1]);
924 /* move data from buffer to register cache */
925 for (i
= 1; i
<= 7; i
++)
927 buf_set_u32(armv4_5
->core_cache
->reg_list
[i
].value
, 0, 32, buffer
[1 + i
]);
928 armv4_5
->core_cache
->reg_list
[i
].dirty
= 1;
929 armv4_5
->core_cache
->reg_list
[i
].valid
= 1;
930 LOG_DEBUG("r%i: 0x%8.8" PRIx32
"", i
, buffer
[i
+ 1]);
933 arm_set_cpsr(armv4_5
, buffer
[9]);
934 LOG_DEBUG("cpsr: 0x%8.8" PRIx32
"", buffer
[9]);
936 if (!is_arm_mode(armv4_5
->core_mode
))
938 target
->state
= TARGET_UNKNOWN
;
939 LOG_ERROR("cpsr contains invalid mode value - communication failure");
940 return ERROR_TARGET_FAILURE
;
942 LOG_DEBUG("target entered debug state in %s mode",
943 arm_mode_name(armv4_5
->core_mode
));
945 /* get banked registers, r8 to r14, and spsr if not in USR/SYS mode */
947 xscale_receive(target
, buffer
, 8);
948 buf_set_u32(armv4_5
->spsr
->value
, 0, 32, buffer
[7]);
949 armv4_5
->spsr
->dirty
= false;
950 armv4_5
->spsr
->valid
= true;
954 /* r8 to r14, but no spsr */
955 xscale_receive(target
, buffer
, 7);
958 /* move data from buffer to right banked register in cache */
959 for (i
= 8; i
<= 14; i
++)
961 struct reg
*r
= arm_reg_current(armv4_5
, i
);
963 buf_set_u32(r
->value
, 0, 32, buffer
[i
- 8]);
968 /* examine debug reason */
969 xscale_read_dcsr(target
);
970 moe
= buf_get_u32(xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].value
, 2, 3);
972 /* stored PC (for calculating fixup) */
973 pc
= buf_get_u32(armv4_5
->pc
->value
, 0, 32);
977 case 0x0: /* Processor reset */
978 target
->debug_reason
= DBG_REASON_DBGRQ
;
979 xscale
->arch_debug_reason
= XSCALE_DBG_REASON_RESET
;
982 case 0x1: /* Instruction breakpoint hit */
983 target
->debug_reason
= DBG_REASON_BREAKPOINT
;
984 xscale
->arch_debug_reason
= XSCALE_DBG_REASON_GENERIC
;
987 case 0x2: /* Data breakpoint hit */
988 target
->debug_reason
= DBG_REASON_WATCHPOINT
;
989 xscale
->arch_debug_reason
= XSCALE_DBG_REASON_GENERIC
;
992 case 0x3: /* BKPT instruction executed */
993 target
->debug_reason
= DBG_REASON_BREAKPOINT
;
994 xscale
->arch_debug_reason
= XSCALE_DBG_REASON_GENERIC
;
997 case 0x4: /* Ext. debug event */
998 target
->debug_reason
= DBG_REASON_DBGRQ
;
999 xscale
->arch_debug_reason
= XSCALE_DBG_REASON_GENERIC
;
1002 case 0x5: /* Vector trap occured */
1003 target
->debug_reason
= DBG_REASON_BREAKPOINT
;
1004 xscale
->arch_debug_reason
= XSCALE_DBG_REASON_GENERIC
;
1007 case 0x6: /* Trace buffer full break */
1008 target
->debug_reason
= DBG_REASON_DBGRQ
;
1009 xscale
->arch_debug_reason
= XSCALE_DBG_REASON_TB_FULL
;
1012 case 0x7: /* Reserved (may flag Hot-Debug support) */
1014 LOG_ERROR("Method of Entry is 'Reserved'");
1019 /* apply PC fixup */
1020 buf_set_u32(armv4_5
->pc
->value
, 0, 32, pc
);
1022 /* on the first debug entry, identify cache type */
1023 if (xscale
->armv4_5_mmu
.armv4_5_cache
.ctype
== -1)
1025 uint32_t cache_type_reg
;
1027 /* read cp15 cache type register */
1028 xscale_get_reg(&xscale
->reg_cache
->reg_list
[XSCALE_CACHETYPE
]);
1029 cache_type_reg
= buf_get_u32(xscale
->reg_cache
->reg_list
[XSCALE_CACHETYPE
].value
, 0, 32);
1031 armv4_5_identify_cache(cache_type_reg
, &xscale
->armv4_5_mmu
.armv4_5_cache
);
1034 /* examine MMU and Cache settings */
1035 /* read cp15 control register */
1036 xscale_get_reg(&xscale
->reg_cache
->reg_list
[XSCALE_CTRL
]);
1037 xscale
->cp15_control_reg
= buf_get_u32(xscale
->reg_cache
->reg_list
[XSCALE_CTRL
].value
, 0, 32);
1038 xscale
->armv4_5_mmu
.mmu_enabled
= (xscale
->cp15_control_reg
& 0x1U
) ? 1 : 0;
1039 xscale
->armv4_5_mmu
.armv4_5_cache
.d_u_cache_enabled
= (xscale
->cp15_control_reg
& 0x4U
) ? 1 : 0;
1040 xscale
->armv4_5_mmu
.armv4_5_cache
.i_cache_enabled
= (xscale
->cp15_control_reg
& 0x1000U
) ? 1 : 0;
1042 /* tracing enabled, read collected trace data */
1043 if (xscale
->trace
.buffer_enabled
)
1045 xscale_read_trace(target
);
1046 xscale
->trace
.buffer_fill
--;
1048 /* resume if we're still collecting trace data */
1049 if ((xscale
->arch_debug_reason
== XSCALE_DBG_REASON_TB_FULL
)
1050 && (xscale
->trace
.buffer_fill
> 0))
1052 xscale_resume(target
, 1, 0x0, 1, 0);
1056 xscale
->trace
.buffer_enabled
= 0;
1063 static int xscale_halt(struct target
*target
)
1065 struct xscale_common
*xscale
= target_to_xscale(target
);
1067 LOG_DEBUG("target->state: %s",
1068 target_state_name(target
));
1070 if (target
->state
== TARGET_HALTED
)
1072 LOG_DEBUG("target was already halted");
1075 else if (target
->state
== TARGET_UNKNOWN
)
1077 /* this must not happen for a xscale target */
1078 LOG_ERROR("target was in unknown state when halt was requested");
1079 return ERROR_TARGET_INVALID
;
1081 else if (target
->state
== TARGET_RESET
)
1083 LOG_DEBUG("target->state == TARGET_RESET");
1087 /* assert external dbg break */
1088 xscale
->external_debug_break
= 1;
1089 xscale_read_dcsr(target
);
1091 target
->debug_reason
= DBG_REASON_DBGRQ
;
1097 static int xscale_enable_single_step(struct target
*target
, uint32_t next_pc
)
1099 struct xscale_common
*xscale
= target_to_xscale(target
);
1100 struct reg
*ibcr0
= &xscale
->reg_cache
->reg_list
[XSCALE_IBCR0
];
1103 if (xscale
->ibcr0_used
)
1105 struct breakpoint
*ibcr0_bp
= breakpoint_find(target
, buf_get_u32(ibcr0
->value
, 0, 32) & 0xfffffffe);
1109 xscale_unset_breakpoint(target
, ibcr0_bp
);
1113 LOG_ERROR("BUG: xscale->ibcr0_used is set, but no breakpoint with that address found");
1118 if ((retval
= xscale_set_reg_u32(ibcr0
, next_pc
| 0x1)) != ERROR_OK
)
1124 static int xscale_disable_single_step(struct target
*target
)
1126 struct xscale_common
*xscale
= target_to_xscale(target
);
1127 struct reg
*ibcr0
= &xscale
->reg_cache
->reg_list
[XSCALE_IBCR0
];
1130 if ((retval
= xscale_set_reg_u32(ibcr0
, 0x0)) != ERROR_OK
)
1136 static void xscale_enable_watchpoints(struct target
*target
)
1138 struct watchpoint
*watchpoint
= target
->watchpoints
;
1142 if (watchpoint
->set
== 0)
1143 xscale_set_watchpoint(target
, watchpoint
);
1144 watchpoint
= watchpoint
->next
;
1148 static void xscale_enable_breakpoints(struct target
*target
)
1150 struct breakpoint
*breakpoint
= target
->breakpoints
;
1152 /* set any pending breakpoints */
1155 if (breakpoint
->set
== 0)
1156 xscale_set_breakpoint(target
, breakpoint
);
1157 breakpoint
= breakpoint
->next
;
1161 static int xscale_resume(struct target
*target
, int current
,
1162 uint32_t address
, int handle_breakpoints
, int debug_execution
)
1164 struct xscale_common
*xscale
= target_to_xscale(target
);
1165 struct arm
*armv4_5
= &xscale
->armv4_5_common
;
1166 struct breakpoint
*breakpoint
= target
->breakpoints
;
1167 uint32_t current_pc
;
1173 if (target
->state
!= TARGET_HALTED
)
1175 LOG_WARNING("target not halted");
1176 return ERROR_TARGET_NOT_HALTED
;
1179 if (!debug_execution
)
1181 target_free_all_working_areas(target
);
1184 /* update vector tables */
1185 if ((retval
= xscale_update_vectors(target
)) != ERROR_OK
)
1188 /* current = 1: continue on current pc, otherwise continue at <address> */
1190 buf_set_u32(armv4_5
->pc
->value
, 0, 32, address
);
1192 current_pc
= buf_get_u32(armv4_5
->pc
->value
, 0, 32);
1194 /* if we're at the reset vector, we have to simulate the branch */
1195 if (current_pc
== 0x0)
1197 arm_simulate_step(target
, NULL
);
1198 current_pc
= buf_get_u32(armv4_5
->pc
->value
, 0, 32);
1201 /* the front-end may request us not to handle breakpoints */
1202 if (handle_breakpoints
)
1204 breakpoint
= breakpoint_find(target
,
1205 buf_get_u32(armv4_5
->pc
->value
, 0, 32));
1206 if (breakpoint
!= NULL
)
1209 int saved_trace_buffer_enabled
;
1211 /* there's a breakpoint at the current PC, we have to step over it */
1212 LOG_DEBUG("unset breakpoint at 0x%8.8" PRIx32
"", breakpoint
->address
);
1213 xscale_unset_breakpoint(target
, breakpoint
);
1215 /* calculate PC of next instruction */
1216 if ((retval
= arm_simulate_step(target
, &next_pc
)) != ERROR_OK
)
1218 uint32_t current_opcode
;
1219 target_read_u32(target
, current_pc
, ¤t_opcode
);
1220 LOG_ERROR("BUG: couldn't calculate PC of next instruction, current opcode was 0x%8.8" PRIx32
"", current_opcode
);
1223 LOG_DEBUG("enable single-step");
1224 xscale_enable_single_step(target
, next_pc
);
1226 /* restore banked registers */
1227 retval
= xscale_restore_banked(target
);
1229 /* send resume request */
1230 xscale_send_u32(target
, 0x30);
1233 xscale_send_u32(target
,
1234 buf_get_u32(armv4_5
->cpsr
->value
, 0, 32));
1235 LOG_DEBUG("writing cpsr with value 0x%8.8" PRIx32
,
1236 buf_get_u32(armv4_5
->cpsr
->value
, 0, 32));
1238 for (i
= 7; i
>= 0; i
--)
1241 xscale_send_u32(target
, buf_get_u32(armv4_5
->core_cache
->reg_list
[i
].value
, 0, 32));
1242 LOG_DEBUG("writing r%i with value 0x%8.8" PRIx32
"", i
, buf_get_u32(armv4_5
->core_cache
->reg_list
[i
].value
, 0, 32));
1246 xscale_send_u32(target
,
1247 buf_get_u32(armv4_5
->pc
->value
, 0, 32));
1248 LOG_DEBUG("writing PC with value 0x%8.8" PRIx32
,
1249 buf_get_u32(armv4_5
->pc
->value
, 0, 32));
1251 /* disable trace data collection in xscale_debug_entry() */
1252 saved_trace_buffer_enabled
= xscale
->trace
.buffer_enabled
;
1253 xscale
->trace
.buffer_enabled
= 0;
1255 /* wait for and process debug entry */
1256 xscale_debug_entry(target
);
1258 /* re-enable trace buffer, if enabled previously */
1259 xscale
->trace
.buffer_enabled
= saved_trace_buffer_enabled
;
1261 LOG_DEBUG("disable single-step");
1262 xscale_disable_single_step(target
);
1264 LOG_DEBUG("set breakpoint at 0x%8.8" PRIx32
"", breakpoint
->address
);
1265 xscale_set_breakpoint(target
, breakpoint
);
1269 /* enable any pending breakpoints and watchpoints */
1270 xscale_enable_breakpoints(target
);
1271 xscale_enable_watchpoints(target
);
1273 /* restore banked registers */
1274 retval
= xscale_restore_banked(target
);
1276 /* send resume request (command 0x30 or 0x31)
1277 * clean the trace buffer if it is to be enabled (0x62) */
1278 if (xscale
->trace
.buffer_enabled
)
1280 /* if trace buffer is set to 'fill' mode, save starting pc */
1281 if (xscale
->trace
.buffer_fill
> 0)
1283 xscale
->trace
.pc_ok
= 1;
1284 xscale
->trace
.current_pc
= buf_get_u32(armv4_5
->pc
->value
, 0, 32);
1286 xscale_send_u32(target
, 0x62);
1287 xscale_send_u32(target
, 0x31);
1290 xscale_send_u32(target
, 0x30);
1293 xscale_send_u32(target
, buf_get_u32(armv4_5
->cpsr
->value
, 0, 32));
1294 LOG_DEBUG("writing cpsr with value 0x%8.8" PRIx32
,
1295 buf_get_u32(armv4_5
->cpsr
->value
, 0, 32));
1297 for (i
= 7; i
>= 0; i
--)
1300 xscale_send_u32(target
, buf_get_u32(armv4_5
->core_cache
->reg_list
[i
].value
, 0, 32));
1301 LOG_DEBUG("writing r%i with value 0x%8.8" PRIx32
"", i
, buf_get_u32(armv4_5
->core_cache
->reg_list
[i
].value
, 0, 32));
1305 xscale_send_u32(target
, buf_get_u32(armv4_5
->pc
->value
, 0, 32));
1306 LOG_DEBUG("wrote PC with value 0x%8.8" PRIx32
,
1307 buf_get_u32(armv4_5
->pc
->value
, 0, 32));
1309 target
->debug_reason
= DBG_REASON_NOTHALTED
;
1311 if (!debug_execution
)
1313 /* registers are now invalid */
1314 register_cache_invalidate(armv4_5
->core_cache
);
1315 target
->state
= TARGET_RUNNING
;
1316 target_call_event_callbacks(target
, TARGET_EVENT_RESUMED
);
1320 target
->state
= TARGET_DEBUG_RUNNING
;
1321 target_call_event_callbacks(target
, TARGET_EVENT_DEBUG_RESUMED
);
1324 LOG_DEBUG("target resumed");
1329 static int xscale_step_inner(struct target
*target
, int current
,
1330 uint32_t address
, int handle_breakpoints
)
1332 struct xscale_common
*xscale
= target_to_xscale(target
);
1333 struct arm
*armv4_5
= &xscale
->armv4_5_common
;
1338 target
->debug_reason
= DBG_REASON_SINGLESTEP
;
1340 /* calculate PC of next instruction */
1341 if ((retval
= arm_simulate_step(target
, &next_pc
)) != ERROR_OK
)
1343 uint32_t current_opcode
, current_pc
;
1344 current_pc
= buf_get_u32(armv4_5
->pc
->value
, 0, 32);
1346 target_read_u32(target
, current_pc
, ¤t_opcode
);
1347 LOG_ERROR("BUG: couldn't calculate PC of next instruction, current opcode was 0x%8.8" PRIx32
"", current_opcode
);
1351 LOG_DEBUG("enable single-step");
1352 if ((retval
= xscale_enable_single_step(target
, next_pc
)) != ERROR_OK
)
1355 /* restore banked registers */
1356 if ((retval
= xscale_restore_banked(target
)) != ERROR_OK
)
1359 /* send resume request (command 0x30 or 0x31)
1360 * clean the trace buffer if it is to be enabled (0x62) */
1361 if (xscale
->trace
.buffer_enabled
)
1363 if ((retval
= xscale_send_u32(target
, 0x62)) != ERROR_OK
)
1365 if ((retval
= xscale_send_u32(target
, 0x31)) != ERROR_OK
)
1369 if ((retval
= xscale_send_u32(target
, 0x30)) != ERROR_OK
)
1373 retval
= xscale_send_u32(target
,
1374 buf_get_u32(armv4_5
->cpsr
->value
, 0, 32));
1375 if (retval
!= ERROR_OK
)
1377 LOG_DEBUG("writing cpsr with value 0x%8.8" PRIx32
,
1378 buf_get_u32(armv4_5
->cpsr
->value
, 0, 32));
1380 for (i
= 7; i
>= 0; i
--)
1383 if ((retval
= xscale_send_u32(target
, buf_get_u32(armv4_5
->core_cache
->reg_list
[i
].value
, 0, 32))) != ERROR_OK
)
1385 LOG_DEBUG("writing r%i with value 0x%8.8" PRIx32
"", i
, buf_get_u32(armv4_5
->core_cache
->reg_list
[i
].value
, 0, 32));
1389 retval
= xscale_send_u32(target
,
1390 buf_get_u32(armv4_5
->pc
->value
, 0, 32));
1391 if (retval
!= ERROR_OK
)
1393 LOG_DEBUG("wrote PC with value 0x%8.8" PRIx32
,
1394 buf_get_u32(armv4_5
->pc
->value
, 0, 32));
1396 target_call_event_callbacks(target
, TARGET_EVENT_RESUMED
);
1398 /* registers are now invalid */
1399 register_cache_invalidate(armv4_5
->core_cache
);
1401 /* wait for and process debug entry */
1402 if ((retval
= xscale_debug_entry(target
)) != ERROR_OK
)
1405 LOG_DEBUG("disable single-step");
1406 if ((retval
= xscale_disable_single_step(target
)) != ERROR_OK
)
1409 target_call_event_callbacks(target
, TARGET_EVENT_HALTED
);
1414 static int xscale_step(struct target
*target
, int current
,
1415 uint32_t address
, int handle_breakpoints
)
1417 struct arm
*armv4_5
= target_to_arm(target
);
1418 struct breakpoint
*breakpoint
= NULL
;
1420 uint32_t current_pc
;
1423 if (target
->state
!= TARGET_HALTED
)
1425 LOG_WARNING("target not halted");
1426 return ERROR_TARGET_NOT_HALTED
;
1429 /* current = 1: continue on current pc, otherwise continue at <address> */
1431 buf_set_u32(armv4_5
->pc
->value
, 0, 32, address
);
1433 current_pc
= buf_get_u32(armv4_5
->pc
->value
, 0, 32);
1435 /* if we're at the reset vector, we have to simulate the step */
1436 if (current_pc
== 0x0)
1438 if ((retval
= arm_simulate_step(target
, NULL
)) != ERROR_OK
)
1440 current_pc
= buf_get_u32(armv4_5
->pc
->value
, 0, 32);
1442 target
->debug_reason
= DBG_REASON_SINGLESTEP
;
1443 target_call_event_callbacks(target
, TARGET_EVENT_HALTED
);
1448 /* the front-end may request us not to handle breakpoints */
1449 if (handle_breakpoints
)
1450 breakpoint
= breakpoint_find(target
,
1451 buf_get_u32(armv4_5
->pc
->value
, 0, 32));
1452 if (breakpoint
!= NULL
) {
1453 retval
= xscale_unset_breakpoint(target
, breakpoint
);
1454 if (retval
!= ERROR_OK
)
1458 retval
= xscale_step_inner(target
, current
, address
, handle_breakpoints
);
1462 xscale_set_breakpoint(target
, breakpoint
);
1465 LOG_DEBUG("target stepped");
1471 static int xscale_assert_reset(struct target
*target
)
1473 struct xscale_common
*xscale
= target_to_xscale(target
);
1475 LOG_DEBUG("target->state: %s",
1476 target_state_name(target
));
1478 /* select DCSR instruction (set endstate to R-T-I to ensure we don't
1479 * end up in T-L-R, which would reset JTAG
1481 xscale_jtag_set_instr(target
->tap
,
1482 XSCALE_SELDCSR
<< xscale
->xscale_variant
,
1485 /* set Hold reset, Halt mode and Trap Reset */
1486 buf_set_u32(xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].value
, 30, 1, 0x1);
1487 buf_set_u32(xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].value
, 16, 1, 0x1);
1488 xscale_write_dcsr(target
, 1, 0);
1490 /* select BYPASS, because having DCSR selected caused problems on the PXA27x */
1491 xscale_jtag_set_instr(target
->tap
, ~0, TAP_IDLE
);
1492 jtag_execute_queue();
1495 jtag_add_reset(0, 1);
1497 /* sleep 1ms, to be sure we fulfill any requirements */
1498 jtag_add_sleep(1000);
1499 jtag_execute_queue();
1501 target
->state
= TARGET_RESET
;
1503 if (target
->reset_halt
)
1506 if ((retval
= target_halt(target
)) != ERROR_OK
)
1513 static int xscale_deassert_reset(struct target
*target
)
1515 struct xscale_common
*xscale
= target_to_xscale(target
);
1516 struct breakpoint
*breakpoint
= target
->breakpoints
;
1520 xscale
->ibcr_available
= 2;
1521 xscale
->ibcr0_used
= 0;
1522 xscale
->ibcr1_used
= 0;
1524 xscale
->dbr_available
= 2;
1525 xscale
->dbr0_used
= 0;
1526 xscale
->dbr1_used
= 0;
1528 /* mark all hardware breakpoints as unset */
1531 if (breakpoint
->type
== BKPT_HARD
)
1533 breakpoint
->set
= 0;
1535 breakpoint
= breakpoint
->next
;
1538 register_cache_invalidate(xscale
->armv4_5_common
.core_cache
);
1540 /* FIXME mark hardware watchpoints got unset too. Also,
1541 * at least some of the XScale registers are invalid...
1545 * REVISIT: *assumes* we had a SRST+TRST reset so the mini-icache
1546 * contents got invalidated. Safer to force that, so writing new
1547 * contents can't ever fail..
1552 const uint8_t *buffer
= xscale_debug_handler
;
1556 jtag_add_reset(0, 0);
1558 /* wait 300ms; 150 and 100ms were not enough */
1559 jtag_add_sleep(300*1000);
1561 jtag_add_runtest(2030, TAP_IDLE
);
1562 jtag_execute_queue();
1564 /* set Hold reset, Halt mode and Trap Reset */
1565 buf_set_u32(xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].value
, 30, 1, 0x1);
1566 buf_set_u32(xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].value
, 16, 1, 0x1);
1567 xscale_write_dcsr(target
, 1, 0);
1569 /* Load the debug handler into the mini-icache. Since
1570 * it's using halt mode (not monitor mode), it runs in
1571 * "Special Debug State" for access to registers, memory,
1572 * coprocessors, trace data, etc.
1574 address
= xscale
->handler_address
;
1575 for (unsigned binary_size
= sizeof xscale_debug_handler
- 1;
1577 binary_size
-= buf_cnt
, buffer
+= buf_cnt
)
1579 uint32_t cache_line
[8];
1582 buf_cnt
= binary_size
;
1586 for (i
= 0; i
< buf_cnt
; i
+= 4)
1588 /* convert LE buffer to host-endian uint32_t */
1589 cache_line
[i
/ 4] = le_to_h_u32(&buffer
[i
]);
1592 for (; i
< 32; i
+= 4)
1594 cache_line
[i
/ 4] = 0xe1a08008;
1597 /* only load addresses other than the reset vectors */
1598 if ((address
% 0x400) != 0x0)
1600 retval
= xscale_load_ic(target
, address
,
1602 if (retval
!= ERROR_OK
)
1609 retval
= xscale_load_ic(target
, 0x0,
1610 xscale
->low_vectors
);
1611 if (retval
!= ERROR_OK
)
1613 retval
= xscale_load_ic(target
, 0xffff0000,
1614 xscale
->high_vectors
);
1615 if (retval
!= ERROR_OK
)
1618 jtag_add_runtest(30, TAP_IDLE
);
1620 jtag_add_sleep(100000);
1622 /* set Hold reset, Halt mode and Trap Reset */
1623 buf_set_u32(xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].value
, 30, 1, 0x1);
1624 buf_set_u32(xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].value
, 16, 1, 0x1);
1625 xscale_write_dcsr(target
, 1, 0);
1627 /* clear Hold reset to let the target run (should enter debug handler) */
1628 xscale_write_dcsr(target
, 0, 1);
1629 target
->state
= TARGET_RUNNING
;
1631 if (!target
->reset_halt
)
1633 jtag_add_sleep(10000);
1635 /* we should have entered debug now */
1636 xscale_debug_entry(target
);
1637 target
->state
= TARGET_HALTED
;
1639 /* resume the target */
1640 xscale_resume(target
, 1, 0x0, 1, 0);
1647 static int xscale_read_core_reg(struct target
*target
, struct reg
*r
,
1648 int num
, enum arm_mode mode
)
1650 /** \todo add debug handler support for core register reads */
1651 LOG_ERROR("not implemented");
1655 static int xscale_write_core_reg(struct target
*target
, struct reg
*r
,
1656 int num
, enum arm_mode mode
, uint32_t value
)
1658 /** \todo add debug handler support for core register writes */
1659 LOG_ERROR("not implemented");
1663 static int xscale_full_context(struct target
*target
)
1665 struct arm
*armv4_5
= target_to_arm(target
);
1673 if (target
->state
!= TARGET_HALTED
)
1675 LOG_WARNING("target not halted");
1676 return ERROR_TARGET_NOT_HALTED
;
1679 buffer
= malloc(4 * 8);
1681 /* iterate through processor modes (FIQ, IRQ, SVC, ABT, UND and SYS)
1682 * we can't enter User mode on an XScale (unpredictable),
1683 * but User shares registers with SYS
1685 for (i
= 1; i
< 7; i
++)
1687 enum arm_mode mode
= armv4_5_number_to_mode(i
);
1691 if (mode
== ARM_MODE_USR
)
1694 /* check if there are invalid registers in the current mode
1696 for (j
= 0; valid
&& j
<= 16; j
++)
1698 if (!ARMV4_5_CORE_REG_MODE(armv4_5
->core_cache
,
1705 /* request banked registers */
1706 xscale_send_u32(target
, 0x0);
1708 /* send CPSR for desired bank mode */
1709 xscale_send_u32(target
, mode
| 0xc0 /* I/F bits */);
1711 /* get banked registers: r8 to r14; and SPSR
1712 * except in USR/SYS mode
1714 if (mode
!= ARM_MODE_SYS
) {
1716 r
= &ARMV4_5_CORE_REG_MODE(armv4_5
->core_cache
,
1719 xscale_receive(target
, buffer
, 8);
1721 buf_set_u32(r
->value
, 0, 32, buffer
[7]);
1725 xscale_receive(target
, buffer
, 7);
1728 /* move data from buffer to register cache */
1729 for (j
= 8; j
<= 14; j
++)
1731 r
= &ARMV4_5_CORE_REG_MODE(armv4_5
->core_cache
,
1734 buf_set_u32(r
->value
, 0, 32, buffer
[j
- 8]);
1745 static int xscale_restore_banked(struct target
*target
)
1747 struct arm
*armv4_5
= target_to_arm(target
);
1751 if (target
->state
!= TARGET_HALTED
)
1753 LOG_WARNING("target not halted");
1754 return ERROR_TARGET_NOT_HALTED
;
1757 /* iterate through processor modes (FIQ, IRQ, SVC, ABT, UND and SYS)
1758 * and check if any banked registers need to be written. Ignore
1759 * USR mode (number 0) in favor of SYS; we can't enter User mode on
1760 * an XScale (unpredictable), but they share all registers.
1762 for (i
= 1; i
< 7; i
++)
1764 enum arm_mode mode
= armv4_5_number_to_mode(i
);
1767 if (mode
== ARM_MODE_USR
)
1770 /* check if there are dirty registers in this mode */
1771 for (j
= 8; j
<= 14; j
++)
1773 if (ARMV4_5_CORE_REG_MODE(armv4_5
->core_cache
,
1778 /* if not USR/SYS, check if the SPSR needs to be written */
1779 if (mode
!= ARM_MODE_SYS
)
1781 if (ARMV4_5_CORE_REG_MODE(armv4_5
->core_cache
,
1786 /* there's nothing to flush for this mode */
1790 /* command 0x1: "send banked registers" */
1791 xscale_send_u32(target
, 0x1);
1793 /* send CPSR for desired mode */
1794 xscale_send_u32(target
, mode
| 0xc0 /* I/F bits */);
1796 /* send r8 to r14/lr ... only FIQ needs more than r13..r14,
1797 * but this protocol doesn't understand that nuance.
1799 for (j
= 8; j
<= 14; j
++) {
1800 r
= &ARMV4_5_CORE_REG_MODE(armv4_5
->core_cache
,
1802 xscale_send_u32(target
, buf_get_u32(r
->value
, 0, 32));
1806 /* send spsr if not in USR/SYS mode */
1807 if (mode
!= ARM_MODE_SYS
) {
1808 r
= &ARMV4_5_CORE_REG_MODE(armv4_5
->core_cache
,
1810 xscale_send_u32(target
, buf_get_u32(r
->value
, 0, 32));
1818 static int xscale_read_memory(struct target
*target
, uint32_t address
,
1819 uint32_t size
, uint32_t count
, uint8_t *buffer
)
1821 struct xscale_common
*xscale
= target_to_xscale(target
);
1826 LOG_DEBUG("address: 0x%8.8" PRIx32
", size: 0x%8.8" PRIx32
", count: 0x%8.8" PRIx32
, address
, size
, count
);
1828 if (target
->state
!= TARGET_HALTED
)
1830 LOG_WARNING("target not halted");
1831 return ERROR_TARGET_NOT_HALTED
;
1834 /* sanitize arguments */
1835 if (((size
!= 4) && (size
!= 2) && (size
!= 1)) || (count
== 0) || !(buffer
))
1836 return ERROR_INVALID_ARGUMENTS
;
1838 if (((size
== 4) && (address
& 0x3u
)) || ((size
== 2) && (address
& 0x1u
)))
1839 return ERROR_TARGET_UNALIGNED_ACCESS
;
1841 /* send memory read request (command 0x1n, n: access size) */
1842 if ((retval
= xscale_send_u32(target
, 0x10 | size
)) != ERROR_OK
)
1845 /* send base address for read request */
1846 if ((retval
= xscale_send_u32(target
, address
)) != ERROR_OK
)
1849 /* send number of requested data words */
1850 if ((retval
= xscale_send_u32(target
, count
)) != ERROR_OK
)
1853 /* receive data from target (count times 32-bit words in host endianness) */
1854 buf32
= malloc(4 * count
);
1855 if ((retval
= xscale_receive(target
, buf32
, count
)) != ERROR_OK
)
1858 /* extract data from host-endian buffer into byte stream */
1859 for (i
= 0; i
< count
; i
++)
1864 target_buffer_set_u32(target
, buffer
, buf32
[i
]);
1868 target_buffer_set_u16(target
, buffer
, buf32
[i
] & 0xffff);
1872 *buffer
++ = buf32
[i
] & 0xff;
1875 LOG_ERROR("invalid read size");
1876 return ERROR_INVALID_ARGUMENTS
;
1882 /* examine DCSR, to see if Sticky Abort (SA) got set */
1883 if ((retval
= xscale_read_dcsr(target
)) != ERROR_OK
)
1885 if (buf_get_u32(xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].value
, 5, 1) == 1)
1888 if ((retval
= xscale_send_u32(target
, 0x60)) != ERROR_OK
)
1891 return ERROR_TARGET_DATA_ABORT
;
1897 static int xscale_read_phys_memory(struct target
*target
, uint32_t address
,
1898 uint32_t size
, uint32_t count
, uint8_t *buffer
)
1900 struct xscale_common
*xscale
= target_to_xscale(target
);
1902 /* with MMU inactive, there are only physical addresses */
1903 if (!xscale
->armv4_5_mmu
.mmu_enabled
)
1904 return xscale_read_memory(target
, address
, size
, count
, buffer
);
1906 /** \todo: provide a non-stub implementation of this routine. */
1907 LOG_ERROR("%s: %s is not implemented. Disable MMU?",
1908 target_name(target
), __func__
);
1912 static int xscale_write_memory(struct target
*target
, uint32_t address
,
1913 uint32_t size
, uint32_t count
, uint8_t *buffer
)
1915 struct xscale_common
*xscale
= target_to_xscale(target
);
1918 LOG_DEBUG("address: 0x%8.8" PRIx32
", size: 0x%8.8" PRIx32
", count: 0x%8.8" PRIx32
, address
, size
, count
);
1920 if (target
->state
!= TARGET_HALTED
)
1922 LOG_WARNING("target not halted");
1923 return ERROR_TARGET_NOT_HALTED
;
1926 /* sanitize arguments */
1927 if (((size
!= 4) && (size
!= 2) && (size
!= 1)) || (count
== 0) || !(buffer
))
1928 return ERROR_INVALID_ARGUMENTS
;
1930 if (((size
== 4) && (address
& 0x3u
)) || ((size
== 2) && (address
& 0x1u
)))
1931 return ERROR_TARGET_UNALIGNED_ACCESS
;
1933 /* send memory write request (command 0x2n, n: access size) */
1934 if ((retval
= xscale_send_u32(target
, 0x20 | size
)) != ERROR_OK
)
1937 /* send base address for read request */
1938 if ((retval
= xscale_send_u32(target
, address
)) != ERROR_OK
)
1941 /* send number of requested data words to be written*/
1942 if ((retval
= xscale_send_u32(target
, count
)) != ERROR_OK
)
1945 /* extract data from host-endian buffer into byte stream */
1947 for (i
= 0; i
< count
; i
++)
1952 value
= target_buffer_get_u32(target
, buffer
);
1953 xscale_send_u32(target
, value
);
1957 value
= target_buffer_get_u16(target
, buffer
);
1958 xscale_send_u32(target
, value
);
1963 xscale_send_u32(target
, value
);
1967 LOG_ERROR("should never get here");
1972 if ((retval
= xscale_send(target
, buffer
, count
, size
)) != ERROR_OK
)
1975 /* examine DCSR, to see if Sticky Abort (SA) got set */
1976 if ((retval
= xscale_read_dcsr(target
)) != ERROR_OK
)
1978 if (buf_get_u32(xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].value
, 5, 1) == 1)
1981 if ((retval
= xscale_send_u32(target
, 0x60)) != ERROR_OK
)
1984 return ERROR_TARGET_DATA_ABORT
;
1990 static int xscale_write_phys_memory(struct target
*target
, uint32_t address
,
1991 uint32_t size
, uint32_t count
, uint8_t *buffer
)
1993 struct xscale_common
*xscale
= target_to_xscale(target
);
1995 /* with MMU inactive, there are only physical addresses */
1996 if (!xscale
->armv4_5_mmu
.mmu_enabled
)
1997 return xscale_read_memory(target
, address
, size
, count
, buffer
);
1999 /** \todo: provide a non-stub implementation of this routine. */
2000 LOG_ERROR("%s: %s is not implemented. Disable MMU?",
2001 target_name(target
), __func__
);
2005 static int xscale_bulk_write_memory(struct target
*target
, uint32_t address
,
2006 uint32_t count
, uint8_t *buffer
)
2008 return xscale_write_memory(target
, address
, 4, count
, buffer
);
2011 static uint32_t xscale_get_ttb(struct target
*target
)
2013 struct xscale_common
*xscale
= target_to_xscale(target
);
2016 xscale_get_reg(&xscale
->reg_cache
->reg_list
[XSCALE_TTB
]);
2017 ttb
= buf_get_u32(xscale
->reg_cache
->reg_list
[XSCALE_TTB
].value
, 0, 32);
2022 static void xscale_disable_mmu_caches(struct target
*target
, int mmu
,
2023 int d_u_cache
, int i_cache
)
2025 struct xscale_common
*xscale
= target_to_xscale(target
);
2026 uint32_t cp15_control
;
2028 /* read cp15 control register */
2029 xscale_get_reg(&xscale
->reg_cache
->reg_list
[XSCALE_CTRL
]);
2030 cp15_control
= buf_get_u32(xscale
->reg_cache
->reg_list
[XSCALE_CTRL
].value
, 0, 32);
2033 cp15_control
&= ~0x1U
;
2038 xscale_send_u32(target
, 0x50);
2039 xscale_send_u32(target
, xscale
->cache_clean_address
);
2041 /* invalidate DCache */
2042 xscale_send_u32(target
, 0x51);
2044 cp15_control
&= ~0x4U
;
2049 /* invalidate ICache */
2050 xscale_send_u32(target
, 0x52);
2051 cp15_control
&= ~0x1000U
;
2054 /* write new cp15 control register */
2055 xscale_set_reg_u32(&xscale
->reg_cache
->reg_list
[XSCALE_CTRL
], cp15_control
);
2057 /* execute cpwait to ensure outstanding operations complete */
2058 xscale_send_u32(target
, 0x53);
2061 static void xscale_enable_mmu_caches(struct target
*target
, int mmu
,
2062 int d_u_cache
, int i_cache
)
2064 struct xscale_common
*xscale
= target_to_xscale(target
);
2065 uint32_t cp15_control
;
2067 /* read cp15 control register */
2068 xscale_get_reg(&xscale
->reg_cache
->reg_list
[XSCALE_CTRL
]);
2069 cp15_control
= buf_get_u32(xscale
->reg_cache
->reg_list
[XSCALE_CTRL
].value
, 0, 32);
2072 cp15_control
|= 0x1U
;
2075 cp15_control
|= 0x4U
;
2078 cp15_control
|= 0x1000U
;
2080 /* write new cp15 control register */
2081 xscale_set_reg_u32(&xscale
->reg_cache
->reg_list
[XSCALE_CTRL
], cp15_control
);
2083 /* execute cpwait to ensure outstanding operations complete */
2084 xscale_send_u32(target
, 0x53);
2087 static int xscale_set_breakpoint(struct target
*target
,
2088 struct breakpoint
*breakpoint
)
2091 struct xscale_common
*xscale
= target_to_xscale(target
);
2093 if (target
->state
!= TARGET_HALTED
)
2095 LOG_WARNING("target not halted");
2096 return ERROR_TARGET_NOT_HALTED
;
2099 if (breakpoint
->set
)
2101 LOG_WARNING("breakpoint already set");
2105 if (breakpoint
->type
== BKPT_HARD
)
2107 uint32_t value
= breakpoint
->address
| 1;
2108 if (!xscale
->ibcr0_used
)
2110 xscale_set_reg_u32(&xscale
->reg_cache
->reg_list
[XSCALE_IBCR0
], value
);
2111 xscale
->ibcr0_used
= 1;
2112 breakpoint
->set
= 1; /* breakpoint set on first breakpoint register */
2114 else if (!xscale
->ibcr1_used
)
2116 xscale_set_reg_u32(&xscale
->reg_cache
->reg_list
[XSCALE_IBCR1
], value
);
2117 xscale
->ibcr1_used
= 1;
2118 breakpoint
->set
= 2; /* breakpoint set on second breakpoint register */
2122 LOG_ERROR("BUG: no hardware comparator available");
2126 else if (breakpoint
->type
== BKPT_SOFT
)
2128 if (breakpoint
->length
== 4)
2130 /* keep the original instruction in target endianness */
2131 if ((retval
= target_read_memory(target
, breakpoint
->address
, 4, 1, breakpoint
->orig_instr
)) != ERROR_OK
)
2135 /* write the bkpt instruction in target endianness (arm7_9->arm_bkpt is host endian) */
2136 if ((retval
= target_write_u32(target
, breakpoint
->address
, xscale
->arm_bkpt
)) != ERROR_OK
)
2143 /* keep the original instruction in target endianness */
2144 if ((retval
= target_read_memory(target
, breakpoint
->address
, 2, 1, breakpoint
->orig_instr
)) != ERROR_OK
)
2148 /* write the bkpt instruction in target endianness (arm7_9->arm_bkpt is host endian) */
2149 if ((retval
= target_write_u32(target
, breakpoint
->address
, xscale
->thumb_bkpt
)) != ERROR_OK
)
2154 breakpoint
->set
= 1;
2156 xscale_send_u32(target
, 0x50); /* clean dcache */
2157 xscale_send_u32(target
, xscale
->cache_clean_address
);
2158 xscale_send_u32(target
, 0x51); /* invalidate dcache */
2159 xscale_send_u32(target
, 0x52); /* invalidate icache and flush fetch buffers */
2165 static int xscale_add_breakpoint(struct target
*target
,
2166 struct breakpoint
*breakpoint
)
2168 struct xscale_common
*xscale
= target_to_xscale(target
);
2170 if ((breakpoint
->type
== BKPT_HARD
) && (xscale
->ibcr_available
< 1))
2172 LOG_INFO("no breakpoint unit available for hardware breakpoint");
2173 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
2176 if ((breakpoint
->length
!= 2) && (breakpoint
->length
!= 4))
2178 LOG_INFO("only breakpoints of two (Thumb) or four (ARM) bytes length supported");
2179 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
2182 if (breakpoint
->type
== BKPT_HARD
)
2184 xscale
->ibcr_available
--;
2190 static int xscale_unset_breakpoint(struct target
*target
,
2191 struct breakpoint
*breakpoint
)
2194 struct xscale_common
*xscale
= target_to_xscale(target
);
2196 if (target
->state
!= TARGET_HALTED
)
2198 LOG_WARNING("target not halted");
2199 return ERROR_TARGET_NOT_HALTED
;
2202 if (!breakpoint
->set
)
2204 LOG_WARNING("breakpoint not set");
2208 if (breakpoint
->type
== BKPT_HARD
)
2210 if (breakpoint
->set
== 1)
2212 xscale_set_reg_u32(&xscale
->reg_cache
->reg_list
[XSCALE_IBCR0
], 0x0);
2213 xscale
->ibcr0_used
= 0;
2215 else if (breakpoint
->set
== 2)
2217 xscale_set_reg_u32(&xscale
->reg_cache
->reg_list
[XSCALE_IBCR1
], 0x0);
2218 xscale
->ibcr1_used
= 0;
2220 breakpoint
->set
= 0;
2224 /* restore original instruction (kept in target endianness) */
2225 if (breakpoint
->length
== 4)
2227 if ((retval
= target_write_memory(target
, breakpoint
->address
, 4, 1, breakpoint
->orig_instr
)) != ERROR_OK
)
2234 if ((retval
= target_write_memory(target
, breakpoint
->address
, 2, 1, breakpoint
->orig_instr
)) != ERROR_OK
)
2239 breakpoint
->set
= 0;
2241 xscale_send_u32(target
, 0x50); /* clean dcache */
2242 xscale_send_u32(target
, xscale
->cache_clean_address
);
2243 xscale_send_u32(target
, 0x51); /* invalidate dcache */
2244 xscale_send_u32(target
, 0x52); /* invalidate icache and flush fetch buffers */
2250 static int xscale_remove_breakpoint(struct target
*target
, struct breakpoint
*breakpoint
)
2252 struct xscale_common
*xscale
= target_to_xscale(target
);
2254 if (target
->state
!= TARGET_HALTED
)
2256 LOG_WARNING("target not halted");
2257 return ERROR_TARGET_NOT_HALTED
;
2260 if (breakpoint
->set
)
2262 xscale_unset_breakpoint(target
, breakpoint
);
2265 if (breakpoint
->type
== BKPT_HARD
)
2266 xscale
->ibcr_available
++;
2271 static int xscale_set_watchpoint(struct target
*target
,
2272 struct watchpoint
*watchpoint
)
2274 struct xscale_common
*xscale
= target_to_xscale(target
);
2276 struct reg
*dbcon
= &xscale
->reg_cache
->reg_list
[XSCALE_DBCON
];
2277 uint32_t dbcon_value
= buf_get_u32(dbcon
->value
, 0, 32);
2279 if (target
->state
!= TARGET_HALTED
)
2281 LOG_WARNING("target not halted");
2282 return ERROR_TARGET_NOT_HALTED
;
2285 xscale_get_reg(dbcon
);
2287 switch (watchpoint
->rw
)
2299 LOG_ERROR("BUG: watchpoint->rw neither read, write nor access");
2302 if (!xscale
->dbr0_used
)
2304 xscale_set_reg_u32(&xscale
->reg_cache
->reg_list
[XSCALE_DBR0
], watchpoint
->address
);
2305 dbcon_value
|= enable
;
2306 xscale_set_reg_u32(dbcon
, dbcon_value
);
2307 watchpoint
->set
= 1;
2308 xscale
->dbr0_used
= 1;
2310 else if (!xscale
->dbr1_used
)
2312 xscale_set_reg_u32(&xscale
->reg_cache
->reg_list
[XSCALE_DBR1
], watchpoint
->address
);
2313 dbcon_value
|= enable
<< 2;
2314 xscale_set_reg_u32(dbcon
, dbcon_value
);
2315 watchpoint
->set
= 2;
2316 xscale
->dbr1_used
= 1;
2320 LOG_ERROR("BUG: no hardware comparator available");
2327 static int xscale_add_watchpoint(struct target
*target
,
2328 struct watchpoint
*watchpoint
)
2330 struct xscale_common
*xscale
= target_to_xscale(target
);
2332 if (xscale
->dbr_available
< 1)
2334 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
2337 if ((watchpoint
->length
!= 1) && (watchpoint
->length
!= 2) && (watchpoint
->length
!= 4))
2339 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
2342 xscale
->dbr_available
--;
2347 static int xscale_unset_watchpoint(struct target
*target
,
2348 struct watchpoint
*watchpoint
)
2350 struct xscale_common
*xscale
= target_to_xscale(target
);
2351 struct reg
*dbcon
= &xscale
->reg_cache
->reg_list
[XSCALE_DBCON
];
2352 uint32_t dbcon_value
= buf_get_u32(dbcon
->value
, 0, 32);
2354 if (target
->state
!= TARGET_HALTED
)
2356 LOG_WARNING("target not halted");
2357 return ERROR_TARGET_NOT_HALTED
;
2360 if (!watchpoint
->set
)
2362 LOG_WARNING("breakpoint not set");
2366 if (watchpoint
->set
== 1)
2368 dbcon_value
&= ~0x3;
2369 xscale_set_reg_u32(dbcon
, dbcon_value
);
2370 xscale
->dbr0_used
= 0;
2372 else if (watchpoint
->set
== 2)
2374 dbcon_value
&= ~0xc;
2375 xscale_set_reg_u32(dbcon
, dbcon_value
);
2376 xscale
->dbr1_used
= 0;
2378 watchpoint
->set
= 0;
2383 static int xscale_remove_watchpoint(struct target
*target
, struct watchpoint
*watchpoint
)
2385 struct xscale_common
*xscale
= target_to_xscale(target
);
2387 if (target
->state
!= TARGET_HALTED
)
2389 LOG_WARNING("target not halted");
2390 return ERROR_TARGET_NOT_HALTED
;
2393 if (watchpoint
->set
)
2395 xscale_unset_watchpoint(target
, watchpoint
);
2398 xscale
->dbr_available
++;
2403 static int xscale_get_reg(struct reg
*reg
)
2405 struct xscale_reg
*arch_info
= reg
->arch_info
;
2406 struct target
*target
= arch_info
->target
;
2407 struct xscale_common
*xscale
= target_to_xscale(target
);
2409 /* DCSR, TX and RX are accessible via JTAG */
2410 if (strcmp(reg
->name
, "XSCALE_DCSR") == 0)
2412 return xscale_read_dcsr(arch_info
->target
);
2414 else if (strcmp(reg
->name
, "XSCALE_TX") == 0)
2416 /* 1 = consume register content */
2417 return xscale_read_tx(arch_info
->target
, 1);
2419 else if (strcmp(reg
->name
, "XSCALE_RX") == 0)
2421 /* can't read from RX register (host -> debug handler) */
2424 else if (strcmp(reg
->name
, "XSCALE_TXRXCTRL") == 0)
2426 /* can't (explicitly) read from TXRXCTRL register */
2429 else /* Other DBG registers have to be transfered by the debug handler */
2431 /* send CP read request (command 0x40) */
2432 xscale_send_u32(target
, 0x40);
2434 /* send CP register number */
2435 xscale_send_u32(target
, arch_info
->dbg_handler_number
);
2437 /* read register value */
2438 xscale_read_tx(target
, 1);
2439 buf_cpy(xscale
->reg_cache
->reg_list
[XSCALE_TX
].value
, reg
->value
, 32);
2448 static int xscale_set_reg(struct reg
*reg
, uint8_t* buf
)
2450 struct xscale_reg
*arch_info
= reg
->arch_info
;
2451 struct target
*target
= arch_info
->target
;
2452 struct xscale_common
*xscale
= target_to_xscale(target
);
2453 uint32_t value
= buf_get_u32(buf
, 0, 32);
2455 /* DCSR, TX and RX are accessible via JTAG */
2456 if (strcmp(reg
->name
, "XSCALE_DCSR") == 0)
2458 buf_set_u32(xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].value
, 0, 32, value
);
2459 return xscale_write_dcsr(arch_info
->target
, -1, -1);
2461 else if (strcmp(reg
->name
, "XSCALE_RX") == 0)
2463 buf_set_u32(xscale
->reg_cache
->reg_list
[XSCALE_RX
].value
, 0, 32, value
);
2464 return xscale_write_rx(arch_info
->target
);
2466 else if (strcmp(reg
->name
, "XSCALE_TX") == 0)
2468 /* can't write to TX register (debug-handler -> host) */
2471 else if (strcmp(reg
->name
, "XSCALE_TXRXCTRL") == 0)
2473 /* can't (explicitly) write to TXRXCTRL register */
2476 else /* Other DBG registers have to be transfered by the debug handler */
2478 /* send CP write request (command 0x41) */
2479 xscale_send_u32(target
, 0x41);
2481 /* send CP register number */
2482 xscale_send_u32(target
, arch_info
->dbg_handler_number
);
2484 /* send CP register value */
2485 xscale_send_u32(target
, value
);
2486 buf_set_u32(reg
->value
, 0, 32, value
);
2492 static int xscale_write_dcsr_sw(struct target
*target
, uint32_t value
)
2494 struct xscale_common
*xscale
= target_to_xscale(target
);
2495 struct reg
*dcsr
= &xscale
->reg_cache
->reg_list
[XSCALE_DCSR
];
2496 struct xscale_reg
*dcsr_arch_info
= dcsr
->arch_info
;
2498 /* send CP write request (command 0x41) */
2499 xscale_send_u32(target
, 0x41);
2501 /* send CP register number */
2502 xscale_send_u32(target
, dcsr_arch_info
->dbg_handler_number
);
2504 /* send CP register value */
2505 xscale_send_u32(target
, value
);
2506 buf_set_u32(dcsr
->value
, 0, 32, value
);
2511 static int xscale_read_trace(struct target
*target
)
2513 struct xscale_common
*xscale
= target_to_xscale(target
);
2514 struct arm
*armv4_5
= &xscale
->armv4_5_common
;
2515 struct xscale_trace_data
**trace_data_p
;
2517 /* 258 words from debug handler
2518 * 256 trace buffer entries
2519 * 2 checkpoint addresses
2521 uint32_t trace_buffer
[258];
2522 int is_address
[256];
2525 if (target
->state
!= TARGET_HALTED
)
2527 LOG_WARNING("target must be stopped to read trace data");
2528 return ERROR_TARGET_NOT_HALTED
;
2531 /* send read trace buffer command (command 0x61) */
2532 xscale_send_u32(target
, 0x61);
2534 /* receive trace buffer content */
2535 xscale_receive(target
, trace_buffer
, 258);
2537 /* parse buffer backwards to identify address entries */
2538 for (i
= 255; i
>= 0; i
--)
2541 if (((trace_buffer
[i
] & 0xf0) == 0x90) ||
2542 ((trace_buffer
[i
] & 0xf0) == 0xd0))
2545 is_address
[--i
] = 1;
2547 is_address
[--i
] = 1;
2549 is_address
[--i
] = 1;
2551 is_address
[--i
] = 1;
2556 /* search first non-zero entry */
2557 for (j
= 0; (j
< 256) && (trace_buffer
[j
] == 0) && (!is_address
[j
]); j
++)
2562 LOG_DEBUG("no trace data collected");
2563 return ERROR_XSCALE_NO_TRACE_DATA
;
2566 for (trace_data_p
= &xscale
->trace
.data
; *trace_data_p
; trace_data_p
= &(*trace_data_p
)->next
)
2569 *trace_data_p
= malloc(sizeof(struct xscale_trace_data
));
2570 (*trace_data_p
)->next
= NULL
;
2571 (*trace_data_p
)->chkpt0
= trace_buffer
[256];
2572 (*trace_data_p
)->chkpt1
= trace_buffer
[257];
2573 (*trace_data_p
)->last_instruction
=
2574 buf_get_u32(armv4_5
->pc
->value
, 0, 32);
2575 (*trace_data_p
)->entries
= malloc(sizeof(struct xscale_trace_entry
) * (256 - j
));
2576 (*trace_data_p
)->depth
= 256 - j
;
2578 for (i
= j
; i
< 256; i
++)
2580 (*trace_data_p
)->entries
[i
- j
].data
= trace_buffer
[i
];
2582 (*trace_data_p
)->entries
[i
- j
].type
= XSCALE_TRACE_ADDRESS
;
2584 (*trace_data_p
)->entries
[i
- j
].type
= XSCALE_TRACE_MESSAGE
;
2590 static int xscale_read_instruction(struct target
*target
,
2591 struct arm_instruction
*instruction
)
2593 struct xscale_common
*xscale
= target_to_xscale(target
);
2600 if (!xscale
->trace
.image
)
2601 return ERROR_TRACE_IMAGE_UNAVAILABLE
;
2603 /* search for the section the current instruction belongs to */
2604 for (i
= 0; i
< xscale
->trace
.image
->num_sections
; i
++)
2606 if ((xscale
->trace
.image
->sections
[i
].base_address
<= xscale
->trace
.current_pc
) &&
2607 (xscale
->trace
.image
->sections
[i
].base_address
+ xscale
->trace
.image
->sections
[i
].size
> xscale
->trace
.current_pc
))
2616 /* current instruction couldn't be found in the image */
2617 return ERROR_TRACE_INSTRUCTION_UNAVAILABLE
;
2620 if (xscale
->trace
.core_state
== ARM_STATE_ARM
)
2623 if ((retval
= image_read_section(xscale
->trace
.image
, section
,
2624 xscale
->trace
.current_pc
- xscale
->trace
.image
->sections
[section
].base_address
,
2625 4, buf
, &size_read
)) != ERROR_OK
)
2627 LOG_ERROR("error while reading instruction: %i", retval
);
2628 return ERROR_TRACE_INSTRUCTION_UNAVAILABLE
;
2630 opcode
= target_buffer_get_u32(target
, buf
);
2631 arm_evaluate_opcode(opcode
, xscale
->trace
.current_pc
, instruction
);
2633 else if (xscale
->trace
.core_state
== ARM_STATE_THUMB
)
2636 if ((retval
= image_read_section(xscale
->trace
.image
, section
,
2637 xscale
->trace
.current_pc
- xscale
->trace
.image
->sections
[section
].base_address
,
2638 2, buf
, &size_read
)) != ERROR_OK
)
2640 LOG_ERROR("error while reading instruction: %i", retval
);
2641 return ERROR_TRACE_INSTRUCTION_UNAVAILABLE
;
2643 opcode
= target_buffer_get_u16(target
, buf
);
2644 thumb_evaluate_opcode(opcode
, xscale
->trace
.current_pc
, instruction
);
2648 LOG_ERROR("BUG: unknown core state encountered");
2655 static int xscale_branch_address(struct xscale_trace_data
*trace_data
,
2656 int i
, uint32_t *target
)
2658 /* if there are less than four entries prior to the indirect branch message
2659 * we can't extract the address */
2665 *target
= (trace_data
->entries
[i
-1].data
) | (trace_data
->entries
[i
-2].data
<< 8) |
2666 (trace_data
->entries
[i
-3].data
<< 16) | (trace_data
->entries
[i
-4].data
<< 24);
2671 static int xscale_analyze_trace(struct target
*target
, struct command_context
*cmd_ctx
)
2673 struct xscale_common
*xscale
= target_to_xscale(target
);
2675 uint32_t next_pc
= 0x0;
2676 struct xscale_trace_data
*trace_data
= xscale
->trace
.data
;
2685 xscale
->trace
.core_state
= ARM_STATE_ARM
;
2690 for (i
= 0; i
< trace_data
->depth
; i
++)
2696 if (trace_data
->entries
[i
].type
== XSCALE_TRACE_ADDRESS
)
2699 switch ((trace_data
->entries
[i
].data
& 0xf0) >> 4)
2701 case 0: /* Exceptions */
2709 exception
= (trace_data
->entries
[i
].data
& 0x70) >> 4;
2711 next_pc
= (trace_data
->entries
[i
].data
& 0xf0) >> 2;
2712 command_print(cmd_ctx
, "--- exception %i ---", (trace_data
->entries
[i
].data
& 0xf0) >> 4);
2714 case 8: /* Direct Branch */
2717 case 9: /* Indirect Branch */
2719 if (xscale_branch_address(trace_data
, i
, &next_pc
) == 0)
2724 case 13: /* Checkpointed Indirect Branch */
2725 if (xscale_branch_address(trace_data
, i
, &next_pc
) == 0)
2728 if (((chkpt
== 0) && (next_pc
!= trace_data
->chkpt0
))
2729 || ((chkpt
== 1) && (next_pc
!= trace_data
->chkpt1
)))
2730 LOG_WARNING("checkpointed indirect branch target address doesn't match checkpoint");
2732 /* explicit fall-through */
2733 case 12: /* Checkpointed Direct Branch */
2738 next_pc
= trace_data
->chkpt0
;
2741 else if (chkpt
== 1)
2744 next_pc
= trace_data
->chkpt0
;
2749 LOG_WARNING("more than two checkpointed branches encountered");
2752 case 15: /* Roll-over */
2755 default: /* Reserved */
2756 command_print(cmd_ctx
, "--- reserved trace message ---");
2757 LOG_ERROR("BUG: trace message %i is reserved", (trace_data
->entries
[i
].data
& 0xf0) >> 4);
2761 if (xscale
->trace
.pc_ok
)
2763 int executed
= (trace_data
->entries
[i
].data
& 0xf) + rollover
* 16;
2764 struct arm_instruction instruction
;
2766 if ((exception
== 6) || (exception
== 7))
2768 /* IRQ or FIQ exception, no instruction executed */
2772 while (executed
-- >= 0)
2774 if ((retval
= xscale_read_instruction(target
, &instruction
)) != ERROR_OK
)
2776 /* can't continue tracing with no image available */
2777 if (retval
== ERROR_TRACE_IMAGE_UNAVAILABLE
)
2781 else if (retval
== ERROR_TRACE_INSTRUCTION_UNAVAILABLE
)
2783 /* TODO: handle incomplete images */
2787 /* a precise abort on a load to the PC is included in the incremental
2788 * word count, other instructions causing data aborts are not included
2790 if ((executed
== 0) && (exception
== 4)
2791 && ((instruction
.type
>= ARM_LDR
) && (instruction
.type
<= ARM_LDM
)))
2793 if ((instruction
.type
== ARM_LDM
)
2794 && ((instruction
.info
.load_store_multiple
.register_list
& 0x8000) == 0))
2798 else if (((instruction
.type
>= ARM_LDR
) && (instruction
.type
<= ARM_LDRSH
))
2799 && (instruction
.info
.load_store
.Rd
!= 15))
2805 /* only the last instruction executed
2806 * (the one that caused the control flow change)
2807 * could be a taken branch
2809 if (((executed
== -1) && (branch
== 1)) &&
2810 (((instruction
.type
== ARM_B
) ||
2811 (instruction
.type
== ARM_BL
) ||
2812 (instruction
.type
== ARM_BLX
)) &&
2813 (instruction
.info
.b_bl_bx_blx
.target_address
!= 0xffffffff)))
2815 xscale
->trace
.current_pc
= instruction
.info
.b_bl_bx_blx
.target_address
;
2819 xscale
->trace
.current_pc
+= (xscale
->trace
.core_state
== ARM_STATE_ARM
) ? 4 : 2;
2821 command_print(cmd_ctx
, "%s", instruction
.text
);
2829 xscale
->trace
.current_pc
= next_pc
;
2830 xscale
->trace
.pc_ok
= 1;
2834 for (; xscale
->trace
.current_pc
< trace_data
->last_instruction
; xscale
->trace
.current_pc
+= (xscale
->trace
.core_state
== ARM_STATE_ARM
) ? 4 : 2)
2836 struct arm_instruction instruction
;
2837 if ((retval
= xscale_read_instruction(target
, &instruction
)) != ERROR_OK
)
2839 /* can't continue tracing with no image available */
2840 if (retval
== ERROR_TRACE_IMAGE_UNAVAILABLE
)
2844 else if (retval
== ERROR_TRACE_INSTRUCTION_UNAVAILABLE
)
2846 /* TODO: handle incomplete images */
2849 command_print(cmd_ctx
, "%s", instruction
.text
);
2852 trace_data
= trace_data
->next
;
2858 static const struct reg_arch_type xscale_reg_type
= {
2859 .get
= xscale_get_reg
,
2860 .set
= xscale_set_reg
,
2863 static void xscale_build_reg_cache(struct target
*target
)
2865 struct xscale_common
*xscale
= target_to_xscale(target
);
2866 struct arm
*armv4_5
= &xscale
->armv4_5_common
;
2867 struct reg_cache
**cache_p
= register_get_last_cache_p(&target
->reg_cache
);
2868 struct xscale_reg
*arch_info
= malloc(sizeof(xscale_reg_arch_info
));
2870 int num_regs
= ARRAY_SIZE(xscale_reg_arch_info
);
2872 (*cache_p
) = arm_build_reg_cache(target
, armv4_5
);
2874 (*cache_p
)->next
= malloc(sizeof(struct reg_cache
));
2875 cache_p
= &(*cache_p
)->next
;
2877 /* fill in values for the xscale reg cache */
2878 (*cache_p
)->name
= "XScale registers";
2879 (*cache_p
)->next
= NULL
;
2880 (*cache_p
)->reg_list
= malloc(num_regs
* sizeof(struct reg
));
2881 (*cache_p
)->num_regs
= num_regs
;
2883 for (i
= 0; i
< num_regs
; i
++)
2885 (*cache_p
)->reg_list
[i
].name
= xscale_reg_list
[i
];
2886 (*cache_p
)->reg_list
[i
].value
= calloc(4, 1);
2887 (*cache_p
)->reg_list
[i
].dirty
= 0;
2888 (*cache_p
)->reg_list
[i
].valid
= 0;
2889 (*cache_p
)->reg_list
[i
].size
= 32;
2890 (*cache_p
)->reg_list
[i
].arch_info
= &arch_info
[i
];
2891 (*cache_p
)->reg_list
[i
].type
= &xscale_reg_type
;
2892 arch_info
[i
] = xscale_reg_arch_info
[i
];
2893 arch_info
[i
].target
= target
;
2896 xscale
->reg_cache
= (*cache_p
);
2899 static int xscale_init_target(struct command_context
*cmd_ctx
,
2900 struct target
*target
)
2902 xscale_build_reg_cache(target
);
2906 static int xscale_init_arch_info(struct target
*target
,
2907 struct xscale_common
*xscale
, struct jtag_tap
*tap
, const char *variant
)
2909 struct arm
*armv4_5
;
2910 uint32_t high_reset_branch
, low_reset_branch
;
2913 armv4_5
= &xscale
->armv4_5_common
;
2915 /* store architecture specfic data */
2916 xscale
->common_magic
= XSCALE_COMMON_MAGIC
;
2918 /* we don't really *need* a variant param ... */
2922 if (strcmp(variant
, "pxa250") == 0
2923 || strcmp(variant
, "pxa255") == 0
2924 || strcmp(variant
, "pxa26x") == 0)
2926 else if (strcmp(variant
, "pxa27x") == 0
2927 || strcmp(variant
, "ixp42x") == 0
2928 || strcmp(variant
, "ixp45x") == 0
2929 || strcmp(variant
, "ixp46x") == 0)
2931 else if (strcmp(variant
, "pxa3xx") == 0)
2934 LOG_WARNING("%s: unrecognized variant %s",
2935 tap
->dotted_name
, variant
);
2937 if (ir_length
&& ir_length
!= tap
->ir_length
) {
2938 LOG_WARNING("%s: IR length for %s is %d; fixing",
2939 tap
->dotted_name
, variant
, ir_length
);
2940 tap
->ir_length
= ir_length
;
2944 /* PXA3xx shifts the JTAG instructions */
2945 if (tap
->ir_length
== 11)
2946 xscale
->xscale_variant
= XSCALE_PXA3XX
;
2948 xscale
->xscale_variant
= XSCALE_IXP4XX_PXA2XX
;
2950 /* the debug handler isn't installed (and thus not running) at this time */
2951 xscale
->handler_address
= 0xfe000800;
2953 /* clear the vectors we keep locally for reference */
2954 memset(xscale
->low_vectors
, 0, sizeof(xscale
->low_vectors
));
2955 memset(xscale
->high_vectors
, 0, sizeof(xscale
->high_vectors
));
2957 /* no user-specified vectors have been configured yet */
2958 xscale
->static_low_vectors_set
= 0x0;
2959 xscale
->static_high_vectors_set
= 0x0;
2961 /* calculate branches to debug handler */
2962 low_reset_branch
= (xscale
->handler_address
+ 0x20 - 0x0 - 0x8) >> 2;
2963 high_reset_branch
= (xscale
->handler_address
+ 0x20 - 0xffff0000 - 0x8) >> 2;
2965 xscale
->low_vectors
[0] = ARMV4_5_B((low_reset_branch
& 0xffffff), 0);
2966 xscale
->high_vectors
[0] = ARMV4_5_B((high_reset_branch
& 0xffffff), 0);
2968 for (i
= 1; i
<= 7; i
++)
2970 xscale
->low_vectors
[i
] = ARMV4_5_B(0xfffffe, 0);
2971 xscale
->high_vectors
[i
] = ARMV4_5_B(0xfffffe, 0);
2974 /* 64kB aligned region used for DCache cleaning */
2975 xscale
->cache_clean_address
= 0xfffe0000;
2977 xscale
->hold_rst
= 0;
2978 xscale
->external_debug_break
= 0;
2980 xscale
->ibcr_available
= 2;
2981 xscale
->ibcr0_used
= 0;
2982 xscale
->ibcr1_used
= 0;
2984 xscale
->dbr_available
= 2;
2985 xscale
->dbr0_used
= 0;
2986 xscale
->dbr1_used
= 0;
2988 LOG_INFO("%s: hardware has 2 breakpoints and 2 watchpoints",
2989 target_name(target
));
2991 xscale
->arm_bkpt
= ARMV5_BKPT(0x0);
2992 xscale
->thumb_bkpt
= ARMV5_T_BKPT(0x0) & 0xffff;
2994 xscale
->vector_catch
= 0x1;
2996 xscale
->trace
.capture_status
= TRACE_IDLE
;
2997 xscale
->trace
.data
= NULL
;
2998 xscale
->trace
.image
= NULL
;
2999 xscale
->trace
.buffer_enabled
= 0;
3000 xscale
->trace
.buffer_fill
= 0;
3002 /* prepare ARMv4/5 specific information */
3003 armv4_5
->arch_info
= xscale
;
3004 armv4_5
->read_core_reg
= xscale_read_core_reg
;
3005 armv4_5
->write_core_reg
= xscale_write_core_reg
;
3006 armv4_5
->full_context
= xscale_full_context
;
3008 arm_init_arch_info(target
, armv4_5
);
3010 xscale
->armv4_5_mmu
.armv4_5_cache
.ctype
= -1;
3011 xscale
->armv4_5_mmu
.get_ttb
= xscale_get_ttb
;
3012 xscale
->armv4_5_mmu
.read_memory
= xscale_read_memory
;
3013 xscale
->armv4_5_mmu
.write_memory
= xscale_write_memory
;
3014 xscale
->armv4_5_mmu
.disable_mmu_caches
= xscale_disable_mmu_caches
;
3015 xscale
->armv4_5_mmu
.enable_mmu_caches
= xscale_enable_mmu_caches
;
3016 xscale
->armv4_5_mmu
.has_tiny_pages
= 1;
3017 xscale
->armv4_5_mmu
.mmu_enabled
= 0;
3022 static int xscale_target_create(struct target
*target
, Jim_Interp
*interp
)
3024 struct xscale_common
*xscale
;
3026 if (sizeof xscale_debug_handler
- 1 > 0x800) {
3027 LOG_ERROR("debug_handler.bin: larger than 2kb");
3031 xscale
= calloc(1, sizeof(*xscale
));
3035 return xscale_init_arch_info(target
, xscale
, target
->tap
,
3039 COMMAND_HANDLER(xscale_handle_debug_handler_command
)
3041 struct target
*target
= NULL
;
3042 struct xscale_common
*xscale
;
3044 uint32_t handler_address
;
3048 LOG_ERROR("'xscale debug_handler <target#> <address>' command takes two required operands");
3052 if ((target
= get_target(CMD_ARGV
[0])) == NULL
)
3054 LOG_ERROR("target '%s' not defined", CMD_ARGV
[0]);
3058 xscale
= target_to_xscale(target
);
3059 retval
= xscale_verify_pointer(CMD_CTX
, xscale
);
3060 if (retval
!= ERROR_OK
)
3063 COMMAND_PARSE_NUMBER(u32
, CMD_ARGV
[1], handler_address
);
3065 if (((handler_address
>= 0x800) && (handler_address
<= 0x1fef800)) ||
3066 ((handler_address
>= 0xfe000800) && (handler_address
<= 0xfffff800)))
3068 xscale
->handler_address
= handler_address
;
3072 LOG_ERROR("xscale debug_handler <address> must be between 0x800 and 0x1fef800 or between 0xfe000800 and 0xfffff800");
3079 COMMAND_HANDLER(xscale_handle_cache_clean_address_command
)
3081 struct target
*target
= NULL
;
3082 struct xscale_common
*xscale
;
3084 uint32_t cache_clean_address
;
3088 return ERROR_COMMAND_SYNTAX_ERROR
;
3091 target
= get_target(CMD_ARGV
[0]);
3094 LOG_ERROR("target '%s' not defined", CMD_ARGV
[0]);
3097 xscale
= target_to_xscale(target
);
3098 retval
= xscale_verify_pointer(CMD_CTX
, xscale
);
3099 if (retval
!= ERROR_OK
)
3102 COMMAND_PARSE_NUMBER(u32
, CMD_ARGV
[1], cache_clean_address
);
3104 if (cache_clean_address
& 0xffff)
3106 LOG_ERROR("xscale cache_clean_address <address> must be 64kb aligned");
3110 xscale
->cache_clean_address
= cache_clean_address
;
3116 COMMAND_HANDLER(xscale_handle_cache_info_command
)
3118 struct target
*target
= get_current_target(CMD_CTX
);
3119 struct xscale_common
*xscale
= target_to_xscale(target
);
3122 retval
= xscale_verify_pointer(CMD_CTX
, xscale
);
3123 if (retval
!= ERROR_OK
)
3126 return armv4_5_handle_cache_info_command(CMD_CTX
, &xscale
->armv4_5_mmu
.armv4_5_cache
);
3129 static int xscale_virt2phys(struct target
*target
,
3130 uint32_t virtual, uint32_t *physical
)
3132 struct xscale_common
*xscale
= target_to_xscale(target
);
3138 if (xscale
->common_magic
!= XSCALE_COMMON_MAGIC
) {
3139 LOG_ERROR(xscale_not
);
3140 return ERROR_TARGET_INVALID
;
3143 uint32_t ret
= armv4_5_mmu_translate_va(target
, &xscale
->armv4_5_mmu
, virtual, &type
, &cb
, &domain
, &ap
);
3152 static int xscale_mmu(struct target
*target
, int *enabled
)
3154 struct xscale_common
*xscale
= target_to_xscale(target
);
3156 if (target
->state
!= TARGET_HALTED
)
3158 LOG_ERROR("Target not halted");
3159 return ERROR_TARGET_INVALID
;
3161 *enabled
= xscale
->armv4_5_mmu
.mmu_enabled
;
3165 COMMAND_HANDLER(xscale_handle_mmu_command
)
3167 struct target
*target
= get_current_target(CMD_CTX
);
3168 struct xscale_common
*xscale
= target_to_xscale(target
);
3171 retval
= xscale_verify_pointer(CMD_CTX
, xscale
);
3172 if (retval
!= ERROR_OK
)
3175 if (target
->state
!= TARGET_HALTED
)
3177 command_print(CMD_CTX
, "target must be stopped for \"%s\" command", CMD_NAME
);
3184 COMMAND_PARSE_ENABLE(CMD_ARGV
[0], enable
);
3186 xscale_enable_mmu_caches(target
, 1, 0, 0);
3188 xscale_disable_mmu_caches(target
, 1, 0, 0);
3189 xscale
->armv4_5_mmu
.mmu_enabled
= enable
;
3192 command_print(CMD_CTX
, "mmu %s", (xscale
->armv4_5_mmu
.mmu_enabled
) ? "enabled" : "disabled");
3197 COMMAND_HANDLER(xscale_handle_idcache_command
)
3199 struct target
*target
= get_current_target(CMD_CTX
);
3200 struct xscale_common
*xscale
= target_to_xscale(target
);
3202 int retval
= xscale_verify_pointer(CMD_CTX
, xscale
);
3203 if (retval
!= ERROR_OK
)
3206 if (target
->state
!= TARGET_HALTED
)
3208 command_print(CMD_CTX
, "target must be stopped for \"%s\" command", CMD_NAME
);
3212 bool icache
= false;
3213 if (strcmp(CMD_NAME
, "icache") == 0)
3218 COMMAND_PARSE_ENABLE(CMD_ARGV
[0], enable
);
3220 xscale
->armv4_5_mmu
.armv4_5_cache
.i_cache_enabled
= enable
;
3222 xscale_enable_mmu_caches(target
, 0, 0, 1);
3224 xscale_disable_mmu_caches(target
, 0, 0, 1);
3226 xscale
->armv4_5_mmu
.armv4_5_cache
.d_u_cache_enabled
= enable
;
3228 xscale_enable_mmu_caches(target
, 0, 1, 0);
3230 xscale_disable_mmu_caches(target
, 0, 1, 0);
3234 bool enabled
= icache
?
3235 xscale
->armv4_5_mmu
.armv4_5_cache
.i_cache_enabled
:
3236 xscale
->armv4_5_mmu
.armv4_5_cache
.d_u_cache_enabled
;
3237 const char *msg
= enabled
? "enabled" : "disabled";
3238 command_print(CMD_CTX
, "%s %s", CMD_NAME
, msg
);
3243 COMMAND_HANDLER(xscale_handle_vector_catch_command
)
3245 struct target
*target
= get_current_target(CMD_CTX
);
3246 struct xscale_common
*xscale
= target_to_xscale(target
);
3249 retval
= xscale_verify_pointer(CMD_CTX
, xscale
);
3250 if (retval
!= ERROR_OK
)
3255 command_print(CMD_CTX
, "usage: xscale vector_catch [mask]");
3259 COMMAND_PARSE_NUMBER(u8
, CMD_ARGV
[0], xscale
->vector_catch
);
3260 buf_set_u32(xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].value
, 16, 8, xscale
->vector_catch
);
3261 xscale_write_dcsr(target
, -1, -1);
3264 command_print(CMD_CTX
, "vector catch mask: 0x%2.2x", xscale
->vector_catch
);
3270 COMMAND_HANDLER(xscale_handle_vector_table_command
)
3272 struct target
*target
= get_current_target(CMD_CTX
);
3273 struct xscale_common
*xscale
= target_to_xscale(target
);
3277 retval
= xscale_verify_pointer(CMD_CTX
, xscale
);
3278 if (retval
!= ERROR_OK
)
3281 if (CMD_ARGC
== 0) /* print current settings */
3285 command_print(CMD_CTX
, "active user-set static vectors:");
3286 for (idx
= 1; idx
< 8; idx
++)
3287 if (xscale
->static_low_vectors_set
& (1 << idx
))
3288 command_print(CMD_CTX
, "low %d: 0x%" PRIx32
, idx
, xscale
->static_low_vectors
[idx
]);
3289 for (idx
= 1; idx
< 8; idx
++)
3290 if (xscale
->static_high_vectors_set
& (1 << idx
))
3291 command_print(CMD_CTX
, "high %d: 0x%" PRIx32
, idx
, xscale
->static_high_vectors
[idx
]);
3300 COMMAND_PARSE_NUMBER(int, CMD_ARGV
[1], idx
);
3302 COMMAND_PARSE_NUMBER(u32
, CMD_ARGV
[2], vec
);
3304 if (idx
< 1 || idx
>= 8)
3307 if (!err
&& strcmp(CMD_ARGV
[0], "low") == 0)
3309 xscale
->static_low_vectors_set
|= (1<<idx
);
3310 xscale
->static_low_vectors
[idx
] = vec
;
3312 else if (!err
&& (strcmp(CMD_ARGV
[0], "high") == 0))
3314 xscale
->static_high_vectors_set
|= (1<<idx
);
3315 xscale
->static_high_vectors
[idx
] = vec
;
3322 command_print(CMD_CTX
, "usage: xscale vector_table <high|low> <index> <code>");
3328 COMMAND_HANDLER(xscale_handle_trace_buffer_command
)
3330 struct target
*target
= get_current_target(CMD_CTX
);
3331 struct xscale_common
*xscale
= target_to_xscale(target
);
3332 struct arm
*armv4_5
= &xscale
->armv4_5_common
;
3333 uint32_t dcsr_value
;
3336 retval
= xscale_verify_pointer(CMD_CTX
, xscale
);
3337 if (retval
!= ERROR_OK
)
3340 if (target
->state
!= TARGET_HALTED
)
3342 command_print(CMD_CTX
, "target must be stopped for \"%s\" command", CMD_NAME
);
3346 if ((CMD_ARGC
>= 1) && (strcmp("enable", CMD_ARGV
[0]) == 0))
3348 struct xscale_trace_data
*td
, *next_td
;
3349 xscale
->trace
.buffer_enabled
= 1;
3351 /* free old trace data */
3352 td
= xscale
->trace
.data
;
3362 xscale
->trace
.data
= NULL
;
3364 else if ((CMD_ARGC
>= 1) && (strcmp("disable", CMD_ARGV
[0]) == 0))
3366 xscale
->trace
.buffer_enabled
= 0;
3369 if ((CMD_ARGC
>= 2) && (strcmp("fill", CMD_ARGV
[1]) == 0))
3373 COMMAND_PARSE_NUMBER(u32
, CMD_ARGV
[2], fill
);
3374 xscale
->trace
.buffer_fill
= fill
;
3376 else if ((CMD_ARGC
>= 2) && (strcmp("wrap", CMD_ARGV
[1]) == 0))
3378 xscale
->trace
.buffer_fill
= -1;
3381 if (xscale
->trace
.buffer_enabled
)
3383 /* if we enable the trace buffer in fill-once
3384 * mode we know the address of the first instruction */
3385 xscale
->trace
.pc_ok
= 1;
3386 xscale
->trace
.current_pc
=
3387 buf_get_u32(armv4_5
->pc
->value
, 0, 32);
3391 /* otherwise the address is unknown, and we have no known good PC */
3392 xscale
->trace
.pc_ok
= 0;
3395 command_print(CMD_CTX
, "trace buffer %s (%s)",
3396 (xscale
->trace
.buffer_enabled
) ? "enabled" : "disabled",
3397 (xscale
->trace
.buffer_fill
> 0) ? "fill" : "wrap");
3399 dcsr_value
= buf_get_u32(xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].value
, 0, 32);
3400 if (xscale
->trace
.buffer_fill
>= 0)
3401 xscale_write_dcsr_sw(target
, (dcsr_value
& 0xfffffffc) | 2);
3403 xscale_write_dcsr_sw(target
, dcsr_value
& 0xfffffffc);
3408 COMMAND_HANDLER(xscale_handle_trace_image_command
)
3410 struct target
*target
= get_current_target(CMD_CTX
);
3411 struct xscale_common
*xscale
= target_to_xscale(target
);
3416 command_print(CMD_CTX
, "usage: xscale trace_image <file> [base address] [type]");
3420 retval
= xscale_verify_pointer(CMD_CTX
, xscale
);
3421 if (retval
!= ERROR_OK
)
3424 if (xscale
->trace
.image
)
3426 image_close(xscale
->trace
.image
);
3427 free(xscale
->trace
.image
);
3428 command_print(CMD_CTX
, "previously loaded image found and closed");
3431 xscale
->trace
.image
= malloc(sizeof(struct image
));
3432 xscale
->trace
.image
->base_address_set
= 0;
3433 xscale
->trace
.image
->start_address_set
= 0;
3435 /* a base address isn't always necessary, default to 0x0 (i.e. don't relocate) */
3438 xscale
->trace
.image
->base_address_set
= 1;
3439 COMMAND_PARSE_NUMBER(llong
, CMD_ARGV
[1], xscale
->trace
.image
->base_address
);
3443 xscale
->trace
.image
->base_address_set
= 0;
3446 if (image_open(xscale
->trace
.image
, CMD_ARGV
[0], (CMD_ARGC
>= 3) ? CMD_ARGV
[2] : NULL
) != ERROR_OK
)
3448 free(xscale
->trace
.image
);
3449 xscale
->trace
.image
= NULL
;
3456 COMMAND_HANDLER(xscale_handle_dump_trace_command
)
3458 struct target
*target
= get_current_target(CMD_CTX
);
3459 struct xscale_common
*xscale
= target_to_xscale(target
);
3460 struct xscale_trace_data
*trace_data
;
3464 retval
= xscale_verify_pointer(CMD_CTX
, xscale
);
3465 if (retval
!= ERROR_OK
)
3468 if (target
->state
!= TARGET_HALTED
)
3470 command_print(CMD_CTX
, "target must be stopped for \"%s\" command", CMD_NAME
);
3476 command_print(CMD_CTX
, "usage: xscale dump_trace <file>");
3480 trace_data
= xscale
->trace
.data
;
3484 command_print(CMD_CTX
, "no trace data collected");
3488 if (fileio_open(&file
, CMD_ARGV
[0], FILEIO_WRITE
, FILEIO_BINARY
) != ERROR_OK
)
3497 fileio_write_u32(&file
, trace_data
->chkpt0
);
3498 fileio_write_u32(&file
, trace_data
->chkpt1
);
3499 fileio_write_u32(&file
, trace_data
->last_instruction
);
3500 fileio_write_u32(&file
, trace_data
->depth
);
3502 for (i
= 0; i
< trace_data
->depth
; i
++)
3503 fileio_write_u32(&file
, trace_data
->entries
[i
].data
| ((trace_data
->entries
[i
].type
& 0xffff) << 16));
3505 trace_data
= trace_data
->next
;
3508 fileio_close(&file
);
3513 COMMAND_HANDLER(xscale_handle_analyze_trace_buffer_command
)
3515 struct target
*target
= get_current_target(CMD_CTX
);
3516 struct xscale_common
*xscale
= target_to_xscale(target
);
3519 retval
= xscale_verify_pointer(CMD_CTX
, xscale
);
3520 if (retval
!= ERROR_OK
)
3523 xscale_analyze_trace(target
, CMD_CTX
);
3528 COMMAND_HANDLER(xscale_handle_cp15
)
3530 struct target
*target
= get_current_target(CMD_CTX
);
3531 struct xscale_common
*xscale
= target_to_xscale(target
);
3534 retval
= xscale_verify_pointer(CMD_CTX
, xscale
);
3535 if (retval
!= ERROR_OK
)
3538 if (target
->state
!= TARGET_HALTED
)
3540 command_print(CMD_CTX
, "target must be stopped for \"%s\" command", CMD_NAME
);
3543 uint32_t reg_no
= 0;
3544 struct reg
*reg
= NULL
;
3547 COMMAND_PARSE_NUMBER(u32
, CMD_ARGV
[0], reg_no
);
3548 /*translate from xscale cp15 register no to openocd register*/
3552 reg_no
= XSCALE_MAINID
;
3555 reg_no
= XSCALE_CTRL
;
3558 reg_no
= XSCALE_TTB
;
3561 reg_no
= XSCALE_DAC
;
3564 reg_no
= XSCALE_FSR
;
3567 reg_no
= XSCALE_FAR
;
3570 reg_no
= XSCALE_PID
;
3573 reg_no
= XSCALE_CPACCESS
;
3576 command_print(CMD_CTX
, "invalid register number");
3577 return ERROR_INVALID_ARGUMENTS
;
3579 reg
= &xscale
->reg_cache
->reg_list
[reg_no
];
3586 /* read cp15 control register */
3587 xscale_get_reg(reg
);
3588 value
= buf_get_u32(reg
->value
, 0, 32);
3589 command_print(CMD_CTX
, "%s (/%i): 0x%" PRIx32
"", reg
->name
, (int)(reg
->size
), value
);
3591 else if (CMD_ARGC
== 2)
3594 COMMAND_PARSE_NUMBER(u32
, CMD_ARGV
[1], value
);
3596 /* send CP write request (command 0x41) */
3597 xscale_send_u32(target
, 0x41);
3599 /* send CP register number */
3600 xscale_send_u32(target
, reg_no
);
3602 /* send CP register value */
3603 xscale_send_u32(target
, value
);
3605 /* execute cpwait to ensure outstanding operations complete */
3606 xscale_send_u32(target
, 0x53);
3610 command_print(CMD_CTX
, "usage: cp15 [register]<, [value]>");
3616 static const struct command_registration xscale_exec_command_handlers
[] = {
3618 .name
= "cache_info",
3619 .handler
= xscale_handle_cache_info_command
,
3620 .mode
= COMMAND_EXEC
,
3621 .help
= "display information about CPU caches",
3625 .handler
= xscale_handle_mmu_command
,
3626 .mode
= COMMAND_EXEC
,
3627 .help
= "enable or disable the MMU",
3628 .usage
= "['enable'|'disable']",
3632 .handler
= xscale_handle_idcache_command
,
3633 .mode
= COMMAND_EXEC
,
3634 .help
= "display ICache state, optionally enabling or "
3636 .usage
= "['enable'|'disable']",
3640 .handler
= xscale_handle_idcache_command
,
3641 .mode
= COMMAND_EXEC
,
3642 .help
= "display DCache state, optionally enabling or "
3644 .usage
= "['enable'|'disable']",
3647 .name
= "vector_catch",
3648 .handler
= xscale_handle_vector_catch_command
,
3649 .mode
= COMMAND_EXEC
,
3650 .help
= "set or display 8-bit mask of vectors "
3651 "that should trigger debug entry",
3655 .name
= "vector_table",
3656 .handler
= xscale_handle_vector_table_command
,
3657 .mode
= COMMAND_EXEC
,
3658 .help
= "set vector table entry in mini-ICache, "
3659 "or display current tables",
3660 .usage
= "[('high'|'low') index code]",
3663 .name
= "trace_buffer",
3664 .handler
= xscale_handle_trace_buffer_command
,
3665 .mode
= COMMAND_EXEC
,
3666 .help
= "display trace buffer status, enable or disable "
3667 "tracing, and optionally reconfigure trace mode",
3668 .usage
= "['enable'|'disable' ['fill' number|'wrap']]",
3671 .name
= "dump_trace",
3672 .handler
= xscale_handle_dump_trace_command
,
3673 .mode
= COMMAND_EXEC
,
3674 .help
= "dump content of trace buffer to file",
3675 .usage
= "filename",
3678 .name
= "analyze_trace",
3679 .handler
= xscale_handle_analyze_trace_buffer_command
,
3680 .mode
= COMMAND_EXEC
,
3681 .help
= "analyze content of trace buffer",
3685 .name
= "trace_image",
3686 .handler
= xscale_handle_trace_image_command
,
3687 .mode
= COMMAND_EXEC
,
3688 .help
= "load image from file to address (default 0)",
3689 .usage
= "filename [offset [filetype]]",
3693 .handler
= xscale_handle_cp15
,
3694 .mode
= COMMAND_EXEC
,
3695 .help
= "Read or write coprocessor 15 register.",
3696 .usage
= "register [value]",
3698 COMMAND_REGISTRATION_DONE
3700 static const struct command_registration xscale_any_command_handlers
[] = {
3702 .name
= "debug_handler",
3703 .handler
= xscale_handle_debug_handler_command
,
3704 .mode
= COMMAND_ANY
,
3705 .help
= "Change address used for debug handler.",
3706 .usage
= "target address",
3709 .name
= "cache_clean_address",
3710 .handler
= xscale_handle_cache_clean_address_command
,
3711 .mode
= COMMAND_ANY
,
3712 .help
= "Change address used for cleaning data cache.",
3716 .chain
= xscale_exec_command_handlers
,
3718 COMMAND_REGISTRATION_DONE
3720 static const struct command_registration xscale_command_handlers
[] = {
3722 .chain
= arm_command_handlers
,
3726 .mode
= COMMAND_ANY
,
3727 .help
= "xscale command group",
3728 .chain
= xscale_any_command_handlers
,
3730 COMMAND_REGISTRATION_DONE
3733 struct target_type xscale_target
=
3737 .poll
= xscale_poll
,
3738 .arch_state
= xscale_arch_state
,
3740 .target_request_data
= NULL
,
3742 .halt
= xscale_halt
,
3743 .resume
= xscale_resume
,
3744 .step
= xscale_step
,
3746 .assert_reset
= xscale_assert_reset
,
3747 .deassert_reset
= xscale_deassert_reset
,
3748 .soft_reset_halt
= NULL
,
3750 /* REVISIT on some cores, allow exporting iwmmxt registers ... */
3751 .get_gdb_reg_list
= arm_get_gdb_reg_list
,
3753 .read_memory
= xscale_read_memory
,
3754 .read_phys_memory
= xscale_read_phys_memory
,
3755 .write_memory
= xscale_write_memory
,
3756 .write_phys_memory
= xscale_write_phys_memory
,
3757 .bulk_write_memory
= xscale_bulk_write_memory
,
3759 .checksum_memory
= arm_checksum_memory
,
3760 .blank_check_memory
= arm_blank_check_memory
,
3762 .run_algorithm
= armv4_5_run_algorithm
,
3764 .add_breakpoint
= xscale_add_breakpoint
,
3765 .remove_breakpoint
= xscale_remove_breakpoint
,
3766 .add_watchpoint
= xscale_add_watchpoint
,
3767 .remove_watchpoint
= xscale_remove_watchpoint
,
3769 .commands
= xscale_command_handlers
,
3770 .target_create
= xscale_target_create
,
3771 .init_target
= xscale_init_target
,
3773 .virt2phys
= xscale_virt2phys
,