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
)
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
);
173 field
.num_bits
= tap
->ir_length
;
174 field
.out_value
= scratch
;
175 buf_set_u32(field
.out_value
, 0, field
.num_bits
, new_instr
);
177 jtag_add_ir_scan(1, &field
, jtag_get_end_state());
183 static int xscale_read_dcsr(struct target
*target
)
185 struct xscale_common
*xscale
= target_to_xscale(target
);
187 struct scan_field fields
[3];
188 uint8_t field0
= 0x0;
189 uint8_t field0_check_value
= 0x2;
190 uint8_t field0_check_mask
= 0x7;
191 uint8_t field2
= 0x0;
192 uint8_t field2_check_value
= 0x0;
193 uint8_t field2_check_mask
= 0x1;
195 jtag_set_end_state(TAP_DRPAUSE
);
196 xscale_jtag_set_instr(target
->tap
,
197 XSCALE_SELDCSR
<< xscale
->xscale_variant
);
199 buf_set_u32(&field0
, 1, 1, xscale
->hold_rst
);
200 buf_set_u32(&field0
, 2, 1, xscale
->external_debug_break
);
202 memset(&fields
, 0, sizeof fields
);
204 fields
[0].tap
= target
->tap
;
205 fields
[0].num_bits
= 3;
206 fields
[0].out_value
= &field0
;
208 fields
[0].in_value
= &tmp
;
210 fields
[1].tap
= target
->tap
;
211 fields
[1].num_bits
= 32;
212 fields
[1].in_value
= xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].value
;
214 fields
[2].tap
= target
->tap
;
215 fields
[2].num_bits
= 1;
216 fields
[2].out_value
= &field2
;
218 fields
[2].in_value
= &tmp2
;
220 jtag_add_dr_scan(3, fields
, jtag_get_end_state());
222 jtag_check_value_mask(fields
+ 0, &field0_check_value
, &field0_check_mask
);
223 jtag_check_value_mask(fields
+ 2, &field2_check_value
, &field2_check_mask
);
225 if ((retval
= jtag_execute_queue()) != ERROR_OK
)
227 LOG_ERROR("JTAG error while reading DCSR");
231 xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].dirty
= 0;
232 xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].valid
= 1;
234 /* write the register with the value we just read
235 * on this second pass, only the first bit of field0 is guaranteed to be 0)
237 field0_check_mask
= 0x1;
238 fields
[1].out_value
= xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].value
;
239 fields
[1].in_value
= NULL
;
241 jtag_set_end_state(TAP_IDLE
);
243 jtag_add_dr_scan(3, fields
, jtag_get_end_state());
245 /* DANGER!!! this must be here. It will make sure that the arguments
246 * to jtag_set_check_value() does not go out of scope! */
247 return jtag_execute_queue();
251 static void xscale_getbuf(jtag_callback_data_t arg
)
253 uint8_t *in
= (uint8_t *)arg
;
254 *((uint32_t *)in
) = buf_get_u32(in
, 0, 32);
257 static int xscale_receive(struct target
*target
, uint32_t *buffer
, int num_words
)
260 return ERROR_INVALID_ARGUMENTS
;
262 struct xscale_common
*xscale
= target_to_xscale(target
);
263 int retval
= ERROR_OK
;
265 struct scan_field fields
[3];
266 uint8_t *field0
= malloc(num_words
* 1);
267 uint8_t field0_check_value
= 0x2;
268 uint8_t field0_check_mask
= 0x6;
269 uint32_t *field1
= malloc(num_words
* 4);
270 uint8_t field2_check_value
= 0x0;
271 uint8_t field2_check_mask
= 0x1;
273 int words_scheduled
= 0;
276 path
[0] = TAP_DRSELECT
;
277 path
[1] = TAP_DRCAPTURE
;
278 path
[2] = TAP_DRSHIFT
;
280 memset(&fields
, 0, sizeof fields
);
282 fields
[0].tap
= target
->tap
;
283 fields
[0].num_bits
= 3;
284 fields
[0].check_value
= &field0_check_value
;
285 fields
[0].check_mask
= &field0_check_mask
;
287 fields
[1].tap
= target
->tap
;
288 fields
[1].num_bits
= 32;
290 fields
[2].tap
= target
->tap
;
291 fields
[2].num_bits
= 1;
292 fields
[2].check_value
= &field2_check_value
;
293 fields
[2].check_mask
= &field2_check_mask
;
295 jtag_set_end_state(TAP_IDLE
);
296 xscale_jtag_set_instr(target
->tap
,
297 XSCALE_DBGTX
<< xscale
->xscale_variant
);
298 jtag_add_runtest(1, jtag_get_end_state()); /* ensures that we're in the TAP_IDLE state as the above could be a no-op */
300 /* repeat until all words have been collected */
302 while (words_done
< num_words
)
306 for (i
= words_done
; i
< num_words
; i
++)
308 fields
[0].in_value
= &field0
[i
];
310 jtag_add_pathmove(3, path
);
312 fields
[1].in_value
= (uint8_t *)(field1
+ i
);
314 jtag_add_dr_scan_check(3, fields
, jtag_set_end_state(TAP_IDLE
));
316 jtag_add_callback(xscale_getbuf
, (jtag_callback_data_t
)(field1
+ i
));
321 if ((retval
= jtag_execute_queue()) != ERROR_OK
)
323 LOG_ERROR("JTAG error while receiving data from debug handler");
327 /* examine results */
328 for (i
= words_done
; i
< num_words
; i
++)
330 if (!(field0
[0] & 1))
332 /* move backwards if necessary */
334 for (j
= i
; j
< num_words
- 1; j
++)
336 field0
[j
] = field0
[j
+ 1];
337 field1
[j
] = field1
[j
+ 1];
342 if (words_scheduled
== 0)
344 if (attempts
++==1000)
346 LOG_ERROR("Failed to receiving data from debug handler after 1000 attempts");
347 retval
= ERROR_TARGET_TIMEOUT
;
352 words_done
+= words_scheduled
;
355 for (i
= 0; i
< num_words
; i
++)
356 *(buffer
++) = buf_get_u32((uint8_t*)&field1
[i
], 0, 32);
363 static int xscale_read_tx(struct target
*target
, int consume
)
365 struct xscale_common
*xscale
= target_to_xscale(target
);
367 tap_state_t noconsume_path
[6];
369 struct timeval timeout
, now
;
370 struct scan_field fields
[3];
371 uint8_t field0_in
= 0x0;
372 uint8_t field0_check_value
= 0x2;
373 uint8_t field0_check_mask
= 0x6;
374 uint8_t field2_check_value
= 0x0;
375 uint8_t field2_check_mask
= 0x1;
377 jtag_set_end_state(TAP_IDLE
);
379 xscale_jtag_set_instr(target
->tap
,
380 XSCALE_DBGTX
<< xscale
->xscale_variant
);
382 path
[0] = TAP_DRSELECT
;
383 path
[1] = TAP_DRCAPTURE
;
384 path
[2] = TAP_DRSHIFT
;
386 noconsume_path
[0] = TAP_DRSELECT
;
387 noconsume_path
[1] = TAP_DRCAPTURE
;
388 noconsume_path
[2] = TAP_DREXIT1
;
389 noconsume_path
[3] = TAP_DRPAUSE
;
390 noconsume_path
[4] = TAP_DREXIT2
;
391 noconsume_path
[5] = TAP_DRSHIFT
;
393 memset(&fields
, 0, sizeof fields
);
395 fields
[0].tap
= target
->tap
;
396 fields
[0].num_bits
= 3;
397 fields
[0].in_value
= &field0_in
;
399 fields
[1].tap
= target
->tap
;
400 fields
[1].num_bits
= 32;
401 fields
[1].in_value
= xscale
->reg_cache
->reg_list
[XSCALE_TX
].value
;
403 fields
[2].tap
= target
->tap
;
404 fields
[2].num_bits
= 1;
406 fields
[2].in_value
= &tmp
;
408 gettimeofday(&timeout
, NULL
);
409 timeval_add_time(&timeout
, 1, 0);
413 /* if we want to consume the register content (i.e. clear TX_READY),
414 * we have to go straight from Capture-DR to Shift-DR
415 * otherwise, we go from Capture-DR to Exit1-DR to Pause-DR
418 jtag_add_pathmove(3, path
);
421 jtag_add_pathmove(ARRAY_SIZE(noconsume_path
), noconsume_path
);
424 jtag_add_dr_scan(3, fields
, jtag_set_end_state(TAP_IDLE
));
426 jtag_check_value_mask(fields
+ 0, &field0_check_value
, &field0_check_mask
);
427 jtag_check_value_mask(fields
+ 2, &field2_check_value
, &field2_check_mask
);
429 if ((retval
= jtag_execute_queue()) != ERROR_OK
)
431 LOG_ERROR("JTAG error while reading TX");
432 return ERROR_TARGET_TIMEOUT
;
435 gettimeofday(&now
, NULL
);
436 if ((now
.tv_sec
> timeout
.tv_sec
) || ((now
.tv_sec
== timeout
.tv_sec
)&& (now
.tv_usec
> timeout
.tv_usec
)))
438 LOG_ERROR("time out reading TX register");
439 return ERROR_TARGET_TIMEOUT
;
441 if (!((!(field0_in
& 1)) && consume
))
445 if (debug_level
>= 3)
447 LOG_DEBUG("waiting 100ms");
448 alive_sleep(100); /* avoid flooding the logs */
456 if (!(field0_in
& 1))
457 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
462 static int xscale_write_rx(struct target
*target
)
464 struct xscale_common
*xscale
= target_to_xscale(target
);
466 struct timeval timeout
, now
;
467 struct scan_field fields
[3];
468 uint8_t field0_out
= 0x0;
469 uint8_t field0_in
= 0x0;
470 uint8_t field0_check_value
= 0x2;
471 uint8_t field0_check_mask
= 0x6;
472 uint8_t field2
= 0x0;
473 uint8_t field2_check_value
= 0x0;
474 uint8_t field2_check_mask
= 0x1;
476 jtag_set_end_state(TAP_IDLE
);
478 xscale_jtag_set_instr(target
->tap
,
479 XSCALE_DBGRX
<< xscale
->xscale_variant
);
481 memset(&fields
, 0, sizeof fields
);
483 fields
[0].tap
= target
->tap
;
484 fields
[0].num_bits
= 3;
485 fields
[0].out_value
= &field0_out
;
486 fields
[0].in_value
= &field0_in
;
488 fields
[1].tap
= target
->tap
;
489 fields
[1].num_bits
= 32;
490 fields
[1].out_value
= xscale
->reg_cache
->reg_list
[XSCALE_RX
].value
;
492 fields
[2].tap
= target
->tap
;
493 fields
[2].num_bits
= 1;
494 fields
[2].out_value
= &field2
;
496 fields
[2].in_value
= &tmp
;
498 gettimeofday(&timeout
, NULL
);
499 timeval_add_time(&timeout
, 1, 0);
501 /* poll until rx_read is low */
502 LOG_DEBUG("polling RX");
505 jtag_add_dr_scan(3, fields
, jtag_set_end_state(TAP_IDLE
));
507 jtag_check_value_mask(fields
+ 0, &field0_check_value
, &field0_check_mask
);
508 jtag_check_value_mask(fields
+ 2, &field2_check_value
, &field2_check_mask
);
510 if ((retval
= jtag_execute_queue()) != ERROR_OK
)
512 LOG_ERROR("JTAG error while writing RX");
516 gettimeofday(&now
, NULL
);
517 if ((now
.tv_sec
> timeout
.tv_sec
) || ((now
.tv_sec
== timeout
.tv_sec
)&& (now
.tv_usec
> timeout
.tv_usec
)))
519 LOG_ERROR("time out writing RX register");
520 return ERROR_TARGET_TIMEOUT
;
522 if (!(field0_in
& 1))
524 if (debug_level
>= 3)
526 LOG_DEBUG("waiting 100ms");
527 alive_sleep(100); /* avoid flooding the logs */
537 jtag_add_dr_scan(3, fields
, jtag_set_end_state(TAP_IDLE
));
539 if ((retval
= jtag_execute_queue()) != ERROR_OK
)
541 LOG_ERROR("JTAG error while writing RX");
548 /* send count elements of size byte to the debug handler */
549 static int xscale_send(struct target
*target
, uint8_t *buffer
, int count
, int size
)
551 struct xscale_common
*xscale
= target_to_xscale(target
);
557 jtag_set_end_state(TAP_IDLE
);
559 xscale_jtag_set_instr(target
->tap
,
560 XSCALE_DBGRX
<< xscale
->xscale_variant
);
567 int endianness
= target
->endianness
;
568 while (done_count
++ < count
)
573 if (endianness
== TARGET_LITTLE_ENDIAN
)
575 t
[1]=le_to_h_u32(buffer
);
578 t
[1]=be_to_h_u32(buffer
);
582 if (endianness
== TARGET_LITTLE_ENDIAN
)
584 t
[1]=le_to_h_u16(buffer
);
587 t
[1]=be_to_h_u16(buffer
);
594 LOG_ERROR("BUG: size neither 4, 2 nor 1");
595 return ERROR_INVALID_ARGUMENTS
;
597 jtag_add_dr_out(target
->tap
,
601 jtag_set_end_state(TAP_IDLE
));
605 if ((retval
= jtag_execute_queue()) != ERROR_OK
)
607 LOG_ERROR("JTAG error while sending data to debug handler");
614 static int xscale_send_u32(struct target
*target
, uint32_t value
)
616 struct xscale_common
*xscale
= target_to_xscale(target
);
618 buf_set_u32(xscale
->reg_cache
->reg_list
[XSCALE_RX
].value
, 0, 32, value
);
619 return xscale_write_rx(target
);
622 static int xscale_write_dcsr(struct target
*target
, int hold_rst
, int ext_dbg_brk
)
624 struct xscale_common
*xscale
= target_to_xscale(target
);
626 struct scan_field fields
[3];
627 uint8_t field0
= 0x0;
628 uint8_t field0_check_value
= 0x2;
629 uint8_t field0_check_mask
= 0x7;
630 uint8_t field2
= 0x0;
631 uint8_t field2_check_value
= 0x0;
632 uint8_t field2_check_mask
= 0x1;
635 xscale
->hold_rst
= hold_rst
;
637 if (ext_dbg_brk
!= -1)
638 xscale
->external_debug_break
= ext_dbg_brk
;
640 jtag_set_end_state(TAP_IDLE
);
641 xscale_jtag_set_instr(target
->tap
,
642 XSCALE_SELDCSR
<< xscale
->xscale_variant
);
644 buf_set_u32(&field0
, 1, 1, xscale
->hold_rst
);
645 buf_set_u32(&field0
, 2, 1, xscale
->external_debug_break
);
647 memset(&fields
, 0, sizeof fields
);
649 fields
[0].tap
= target
->tap
;
650 fields
[0].num_bits
= 3;
651 fields
[0].out_value
= &field0
;
653 fields
[0].in_value
= &tmp
;
655 fields
[1].tap
= target
->tap
;
656 fields
[1].num_bits
= 32;
657 fields
[1].out_value
= xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].value
;
659 fields
[2].tap
= target
->tap
;
660 fields
[2].num_bits
= 1;
661 fields
[2].out_value
= &field2
;
663 fields
[2].in_value
= &tmp2
;
665 jtag_add_dr_scan(3, fields
, jtag_get_end_state());
667 jtag_check_value_mask(fields
+ 0, &field0_check_value
, &field0_check_mask
);
668 jtag_check_value_mask(fields
+ 2, &field2_check_value
, &field2_check_mask
);
670 if ((retval
= jtag_execute_queue()) != ERROR_OK
)
672 LOG_ERROR("JTAG error while writing DCSR");
676 xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].dirty
= 0;
677 xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].valid
= 1;
682 /* parity of the number of bits 0 if even; 1 if odd. for 32 bit words */
683 static unsigned int parity (unsigned int v
)
685 // unsigned int ov = v;
690 // LOG_DEBUG("parity of 0x%x is %i", ov, (0x6996 >> v) & 1);
691 return (0x6996 >> v
) & 1;
694 static int xscale_load_ic(struct target
*target
, uint32_t va
, uint32_t buffer
[8])
696 struct xscale_common
*xscale
= target_to_xscale(target
);
700 struct scan_field fields
[2];
702 LOG_DEBUG("loading miniIC at 0x%8.8" PRIx32
"", va
);
705 jtag_set_end_state(TAP_IDLE
);
706 xscale_jtag_set_instr(target
->tap
,
707 XSCALE_LDIC
<< xscale
->xscale_variant
);
709 /* CMD is b011 to load a cacheline into the Mini ICache.
710 * Loading into the main ICache is deprecated, and unused.
711 * It's followed by three zero bits, and 27 address bits.
713 buf_set_u32(&cmd
, 0, 6, 0x3);
715 /* virtual address of desired cache line */
716 buf_set_u32(packet
, 0, 27, va
>> 5);
718 memset(&fields
, 0, sizeof fields
);
720 fields
[0].tap
= target
->tap
;
721 fields
[0].num_bits
= 6;
722 fields
[0].out_value
= &cmd
;
724 fields
[1].tap
= target
->tap
;
725 fields
[1].num_bits
= 27;
726 fields
[1].out_value
= packet
;
728 jtag_add_dr_scan(2, fields
, jtag_get_end_state());
730 /* rest of packet is a cacheline: 8 instructions, with parity */
731 fields
[0].num_bits
= 32;
732 fields
[0].out_value
= packet
;
734 fields
[1].num_bits
= 1;
735 fields
[1].out_value
= &cmd
;
737 for (word
= 0; word
< 8; word
++)
739 buf_set_u32(packet
, 0, 32, buffer
[word
]);
742 memcpy(&value
, packet
, sizeof(uint32_t));
745 jtag_add_dr_scan(2, fields
, jtag_get_end_state());
748 return jtag_execute_queue();
751 static int xscale_invalidate_ic_line(struct target
*target
, uint32_t va
)
753 struct xscale_common
*xscale
= target_to_xscale(target
);
756 struct scan_field fields
[2];
758 jtag_set_end_state(TAP_IDLE
);
759 xscale_jtag_set_instr(target
->tap
,
760 XSCALE_LDIC
<< xscale
->xscale_variant
);
762 /* CMD for invalidate IC line b000, bits [6:4] b000 */
763 buf_set_u32(&cmd
, 0, 6, 0x0);
765 /* virtual address of desired cache line */
766 buf_set_u32(packet
, 0, 27, va
>> 5);
768 memset(&fields
, 0, sizeof fields
);
770 fields
[0].tap
= target
->tap
;
771 fields
[0].num_bits
= 6;
772 fields
[0].out_value
= &cmd
;
774 fields
[1].tap
= target
->tap
;
775 fields
[1].num_bits
= 27;
776 fields
[1].out_value
= packet
;
778 jtag_add_dr_scan(2, fields
, jtag_get_end_state());
783 static int xscale_update_vectors(struct target
*target
)
785 struct xscale_common
*xscale
= target_to_xscale(target
);
789 uint32_t low_reset_branch
, high_reset_branch
;
791 for (i
= 1; i
< 8; i
++)
793 /* if there's a static vector specified for this exception, override */
794 if (xscale
->static_high_vectors_set
& (1 << i
))
796 xscale
->high_vectors
[i
] = xscale
->static_high_vectors
[i
];
800 retval
= target_read_u32(target
, 0xffff0000 + 4*i
, &xscale
->high_vectors
[i
]);
801 if (retval
== ERROR_TARGET_TIMEOUT
)
803 if (retval
!= ERROR_OK
)
805 /* Some of these reads will fail as part of normal execution */
806 xscale
->high_vectors
[i
] = ARMV4_5_B(0xfffffe, 0);
811 for (i
= 1; i
< 8; i
++)
813 if (xscale
->static_low_vectors_set
& (1 << i
))
815 xscale
->low_vectors
[i
] = xscale
->static_low_vectors
[i
];
819 retval
= target_read_u32(target
, 0x0 + 4*i
, &xscale
->low_vectors
[i
]);
820 if (retval
== ERROR_TARGET_TIMEOUT
)
822 if (retval
!= ERROR_OK
)
824 /* Some of these reads will fail as part of normal execution */
825 xscale
->low_vectors
[i
] = ARMV4_5_B(0xfffffe, 0);
830 /* calculate branches to debug handler */
831 low_reset_branch
= (xscale
->handler_address
+ 0x20 - 0x0 - 0x8) >> 2;
832 high_reset_branch
= (xscale
->handler_address
+ 0x20 - 0xffff0000 - 0x8) >> 2;
834 xscale
->low_vectors
[0] = ARMV4_5_B((low_reset_branch
& 0xffffff), 0);
835 xscale
->high_vectors
[0] = ARMV4_5_B((high_reset_branch
& 0xffffff), 0);
837 /* invalidate and load exception vectors in mini i-cache */
838 xscale_invalidate_ic_line(target
, 0x0);
839 xscale_invalidate_ic_line(target
, 0xffff0000);
841 xscale_load_ic(target
, 0x0, xscale
->low_vectors
);
842 xscale_load_ic(target
, 0xffff0000, xscale
->high_vectors
);
847 static int xscale_arch_state(struct target
*target
)
849 struct xscale_common
*xscale
= target_to_xscale(target
);
850 struct arm
*armv4_5
= &xscale
->armv4_5_common
;
852 static const char *state
[] =
854 "disabled", "enabled"
857 static const char *arch_dbg_reason
[] =
859 "", "\n(processor reset)", "\n(trace buffer full)"
862 if (armv4_5
->common_magic
!= ARM_COMMON_MAGIC
)
864 LOG_ERROR("BUG: called for a non-ARMv4/5 target");
865 return ERROR_INVALID_ARGUMENTS
;
868 arm_arch_state(target
);
869 LOG_USER("MMU: %s, D-Cache: %s, I-Cache: %s%s",
870 state
[xscale
->armv4_5_mmu
.mmu_enabled
],
871 state
[xscale
->armv4_5_mmu
.armv4_5_cache
.d_u_cache_enabled
],
872 state
[xscale
->armv4_5_mmu
.armv4_5_cache
.i_cache_enabled
],
873 arch_dbg_reason
[xscale
->arch_debug_reason
]);
878 static int xscale_poll(struct target
*target
)
880 int retval
= ERROR_OK
;
882 if ((target
->state
== TARGET_RUNNING
) || (target
->state
== TARGET_DEBUG_RUNNING
))
884 enum target_state previous_state
= target
->state
;
885 if ((retval
= xscale_read_tx(target
, 0)) == ERROR_OK
)
888 /* there's data to read from the tx register, we entered debug state */
889 target
->state
= TARGET_HALTED
;
891 /* process debug entry, fetching current mode regs */
892 retval
= xscale_debug_entry(target
);
894 else if (retval
!= ERROR_TARGET_RESOURCE_NOT_AVAILABLE
)
896 LOG_USER("error while polling TX register, reset CPU");
897 /* here we "lie" so GDB won't get stuck and a reset can be perfomed */
898 target
->state
= TARGET_HALTED
;
901 /* debug_entry could have overwritten target state (i.e. immediate resume)
902 * don't signal event handlers in that case
904 if (target
->state
!= TARGET_HALTED
)
907 /* if target was running, signal that we halted
908 * otherwise we reentered from debug execution */
909 if (previous_state
== TARGET_RUNNING
)
910 target_call_event_callbacks(target
, TARGET_EVENT_HALTED
);
912 target_call_event_callbacks(target
, TARGET_EVENT_DEBUG_HALTED
);
918 static int xscale_debug_entry(struct target
*target
)
920 struct xscale_common
*xscale
= target_to_xscale(target
);
921 struct arm
*armv4_5
= &xscale
->armv4_5_common
;
928 /* clear external dbg break (will be written on next DCSR read) */
929 xscale
->external_debug_break
= 0;
930 if ((retval
= xscale_read_dcsr(target
)) != ERROR_OK
)
933 /* get r0, pc, r1 to r7 and cpsr */
934 if ((retval
= xscale_receive(target
, buffer
, 10)) != ERROR_OK
)
937 /* move r0 from buffer to register cache */
938 buf_set_u32(armv4_5
->core_cache
->reg_list
[0].value
, 0, 32, buffer
[0]);
939 armv4_5
->core_cache
->reg_list
[0].dirty
= 1;
940 armv4_5
->core_cache
->reg_list
[0].valid
= 1;
941 LOG_DEBUG("r0: 0x%8.8" PRIx32
"", buffer
[0]);
943 /* move pc from buffer to register cache */
944 buf_set_u32(armv4_5
->core_cache
->reg_list
[15].value
, 0, 32, buffer
[1]);
945 armv4_5
->core_cache
->reg_list
[15].dirty
= 1;
946 armv4_5
->core_cache
->reg_list
[15].valid
= 1;
947 LOG_DEBUG("pc: 0x%8.8" PRIx32
"", buffer
[1]);
949 /* move data from buffer to register cache */
950 for (i
= 1; i
<= 7; i
++)
952 buf_set_u32(armv4_5
->core_cache
->reg_list
[i
].value
, 0, 32, buffer
[1 + i
]);
953 armv4_5
->core_cache
->reg_list
[i
].dirty
= 1;
954 armv4_5
->core_cache
->reg_list
[i
].valid
= 1;
955 LOG_DEBUG("r%i: 0x%8.8" PRIx32
"", i
, buffer
[i
+ 1]);
958 arm_set_cpsr(armv4_5
, buffer
[9]);
959 LOG_DEBUG("cpsr: 0x%8.8" PRIx32
"", buffer
[9]);
961 if (!is_arm_mode(armv4_5
->core_mode
))
963 target
->state
= TARGET_UNKNOWN
;
964 LOG_ERROR("cpsr contains invalid mode value - communication failure");
965 return ERROR_TARGET_FAILURE
;
967 LOG_DEBUG("target entered debug state in %s mode",
968 arm_mode_name(armv4_5
->core_mode
));
970 /* get banked registers, r8 to r14, and spsr if not in USR/SYS mode */
972 xscale_receive(target
, buffer
, 8);
973 buf_set_u32(armv4_5
->spsr
->value
, 0, 32, buffer
[7]);
974 armv4_5
->spsr
->dirty
= false;
975 armv4_5
->spsr
->valid
= true;
979 /* r8 to r14, but no spsr */
980 xscale_receive(target
, buffer
, 7);
983 /* move data from buffer to right banked register in cache */
984 for (i
= 8; i
<= 14; i
++)
986 struct reg
*r
= arm_reg_current(armv4_5
, i
);
988 buf_set_u32(r
->value
, 0, 32, buffer
[i
- 8]);
993 /* examine debug reason */
994 xscale_read_dcsr(target
);
995 moe
= buf_get_u32(xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].value
, 2, 3);
997 /* stored PC (for calculating fixup) */
998 pc
= buf_get_u32(armv4_5
->core_cache
->reg_list
[15].value
, 0, 32);
1002 case 0x0: /* Processor reset */
1003 target
->debug_reason
= DBG_REASON_DBGRQ
;
1004 xscale
->arch_debug_reason
= XSCALE_DBG_REASON_RESET
;
1007 case 0x1: /* Instruction breakpoint hit */
1008 target
->debug_reason
= DBG_REASON_BREAKPOINT
;
1009 xscale
->arch_debug_reason
= XSCALE_DBG_REASON_GENERIC
;
1012 case 0x2: /* Data breakpoint hit */
1013 target
->debug_reason
= DBG_REASON_WATCHPOINT
;
1014 xscale
->arch_debug_reason
= XSCALE_DBG_REASON_GENERIC
;
1017 case 0x3: /* BKPT instruction executed */
1018 target
->debug_reason
= DBG_REASON_BREAKPOINT
;
1019 xscale
->arch_debug_reason
= XSCALE_DBG_REASON_GENERIC
;
1022 case 0x4: /* Ext. debug event */
1023 target
->debug_reason
= DBG_REASON_DBGRQ
;
1024 xscale
->arch_debug_reason
= XSCALE_DBG_REASON_GENERIC
;
1027 case 0x5: /* Vector trap occured */
1028 target
->debug_reason
= DBG_REASON_BREAKPOINT
;
1029 xscale
->arch_debug_reason
= XSCALE_DBG_REASON_GENERIC
;
1032 case 0x6: /* Trace buffer full break */
1033 target
->debug_reason
= DBG_REASON_DBGRQ
;
1034 xscale
->arch_debug_reason
= XSCALE_DBG_REASON_TB_FULL
;
1037 case 0x7: /* Reserved (may flag Hot-Debug support) */
1039 LOG_ERROR("Method of Entry is 'Reserved'");
1044 /* apply PC fixup */
1045 buf_set_u32(armv4_5
->core_cache
->reg_list
[15].value
, 0, 32, pc
);
1047 /* on the first debug entry, identify cache type */
1048 if (xscale
->armv4_5_mmu
.armv4_5_cache
.ctype
== -1)
1050 uint32_t cache_type_reg
;
1052 /* read cp15 cache type register */
1053 xscale_get_reg(&xscale
->reg_cache
->reg_list
[XSCALE_CACHETYPE
]);
1054 cache_type_reg
= buf_get_u32(xscale
->reg_cache
->reg_list
[XSCALE_CACHETYPE
].value
, 0, 32);
1056 armv4_5_identify_cache(cache_type_reg
, &xscale
->armv4_5_mmu
.armv4_5_cache
);
1059 /* examine MMU and Cache settings */
1060 /* read cp15 control register */
1061 xscale_get_reg(&xscale
->reg_cache
->reg_list
[XSCALE_CTRL
]);
1062 xscale
->cp15_control_reg
= buf_get_u32(xscale
->reg_cache
->reg_list
[XSCALE_CTRL
].value
, 0, 32);
1063 xscale
->armv4_5_mmu
.mmu_enabled
= (xscale
->cp15_control_reg
& 0x1U
) ? 1 : 0;
1064 xscale
->armv4_5_mmu
.armv4_5_cache
.d_u_cache_enabled
= (xscale
->cp15_control_reg
& 0x4U
) ? 1 : 0;
1065 xscale
->armv4_5_mmu
.armv4_5_cache
.i_cache_enabled
= (xscale
->cp15_control_reg
& 0x1000U
) ? 1 : 0;
1067 /* tracing enabled, read collected trace data */
1068 if (xscale
->trace
.buffer_enabled
)
1070 xscale_read_trace(target
);
1071 xscale
->trace
.buffer_fill
--;
1073 /* resume if we're still collecting trace data */
1074 if ((xscale
->arch_debug_reason
== XSCALE_DBG_REASON_TB_FULL
)
1075 && (xscale
->trace
.buffer_fill
> 0))
1077 xscale_resume(target
, 1, 0x0, 1, 0);
1081 xscale
->trace
.buffer_enabled
= 0;
1088 static int xscale_halt(struct target
*target
)
1090 struct xscale_common
*xscale
= target_to_xscale(target
);
1092 LOG_DEBUG("target->state: %s",
1093 target_state_name(target
));
1095 if (target
->state
== TARGET_HALTED
)
1097 LOG_DEBUG("target was already halted");
1100 else if (target
->state
== TARGET_UNKNOWN
)
1102 /* this must not happen for a xscale target */
1103 LOG_ERROR("target was in unknown state when halt was requested");
1104 return ERROR_TARGET_INVALID
;
1106 else if (target
->state
== TARGET_RESET
)
1108 LOG_DEBUG("target->state == TARGET_RESET");
1112 /* assert external dbg break */
1113 xscale
->external_debug_break
= 1;
1114 xscale_read_dcsr(target
);
1116 target
->debug_reason
= DBG_REASON_DBGRQ
;
1122 static int xscale_enable_single_step(struct target
*target
, uint32_t next_pc
)
1124 struct xscale_common
*xscale
= target_to_xscale(target
);
1125 struct reg
*ibcr0
= &xscale
->reg_cache
->reg_list
[XSCALE_IBCR0
];
1128 if (xscale
->ibcr0_used
)
1130 struct breakpoint
*ibcr0_bp
= breakpoint_find(target
, buf_get_u32(ibcr0
->value
, 0, 32) & 0xfffffffe);
1134 xscale_unset_breakpoint(target
, ibcr0_bp
);
1138 LOG_ERROR("BUG: xscale->ibcr0_used is set, but no breakpoint with that address found");
1143 if ((retval
= xscale_set_reg_u32(ibcr0
, next_pc
| 0x1)) != ERROR_OK
)
1149 static int xscale_disable_single_step(struct target
*target
)
1151 struct xscale_common
*xscale
= target_to_xscale(target
);
1152 struct reg
*ibcr0
= &xscale
->reg_cache
->reg_list
[XSCALE_IBCR0
];
1155 if ((retval
= xscale_set_reg_u32(ibcr0
, 0x0)) != ERROR_OK
)
1161 static void xscale_enable_watchpoints(struct target
*target
)
1163 struct watchpoint
*watchpoint
= target
->watchpoints
;
1167 if (watchpoint
->set
== 0)
1168 xscale_set_watchpoint(target
, watchpoint
);
1169 watchpoint
= watchpoint
->next
;
1173 static void xscale_enable_breakpoints(struct target
*target
)
1175 struct breakpoint
*breakpoint
= target
->breakpoints
;
1177 /* set any pending breakpoints */
1180 if (breakpoint
->set
== 0)
1181 xscale_set_breakpoint(target
, breakpoint
);
1182 breakpoint
= breakpoint
->next
;
1186 static int xscale_resume(struct target
*target
, int current
,
1187 uint32_t address
, int handle_breakpoints
, int debug_execution
)
1189 struct xscale_common
*xscale
= target_to_xscale(target
);
1190 struct arm
*armv4_5
= &xscale
->armv4_5_common
;
1191 struct breakpoint
*breakpoint
= target
->breakpoints
;
1192 uint32_t current_pc
;
1198 if (target
->state
!= TARGET_HALTED
)
1200 LOG_WARNING("target not halted");
1201 return ERROR_TARGET_NOT_HALTED
;
1204 if (!debug_execution
)
1206 target_free_all_working_areas(target
);
1209 /* update vector tables */
1210 if ((retval
= xscale_update_vectors(target
)) != ERROR_OK
)
1213 /* current = 1: continue on current pc, otherwise continue at <address> */
1215 buf_set_u32(armv4_5
->core_cache
->reg_list
[15].value
, 0, 32, address
);
1217 current_pc
= buf_get_u32(armv4_5
->core_cache
->reg_list
[15].value
, 0, 32);
1219 /* if we're at the reset vector, we have to simulate the branch */
1220 if (current_pc
== 0x0)
1222 arm_simulate_step(target
, NULL
);
1223 current_pc
= buf_get_u32(armv4_5
->core_cache
->reg_list
[15].value
, 0, 32);
1226 /* the front-end may request us not to handle breakpoints */
1227 if (handle_breakpoints
)
1229 if ((breakpoint
= breakpoint_find(target
, buf_get_u32(armv4_5
->core_cache
->reg_list
[15].value
, 0, 32))))
1233 /* there's a breakpoint at the current PC, we have to step over it */
1234 LOG_DEBUG("unset breakpoint at 0x%8.8" PRIx32
"", breakpoint
->address
);
1235 xscale_unset_breakpoint(target
, breakpoint
);
1237 /* calculate PC of next instruction */
1238 if ((retval
= arm_simulate_step(target
, &next_pc
)) != ERROR_OK
)
1240 uint32_t current_opcode
;
1241 target_read_u32(target
, current_pc
, ¤t_opcode
);
1242 LOG_ERROR("BUG: couldn't calculate PC of next instruction, current opcode was 0x%8.8" PRIx32
"", current_opcode
);
1245 LOG_DEBUG("enable single-step");
1246 xscale_enable_single_step(target
, next_pc
);
1248 /* restore banked registers */
1249 retval
= xscale_restore_banked(target
);
1251 /* send resume request (command 0x30 or 0x31)
1252 * clean the trace buffer if it is to be enabled (0x62) */
1253 if (xscale
->trace
.buffer_enabled
)
1255 xscale_send_u32(target
, 0x62);
1256 xscale_send_u32(target
, 0x31);
1259 xscale_send_u32(target
, 0x30);
1262 xscale_send_u32(target
,
1263 buf_get_u32(armv4_5
->cpsr
->value
, 0, 32));
1264 LOG_DEBUG("writing cpsr with value 0x%8.8" PRIx32
,
1265 buf_get_u32(armv4_5
->cpsr
->value
, 0, 32));
1267 for (i
= 7; i
>= 0; i
--)
1270 xscale_send_u32(target
, buf_get_u32(armv4_5
->core_cache
->reg_list
[i
].value
, 0, 32));
1271 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));
1275 xscale_send_u32(target
, buf_get_u32(armv4_5
->core_cache
->reg_list
[15].value
, 0, 32));
1276 LOG_DEBUG("writing PC with value 0x%8.8" PRIx32
"", buf_get_u32(armv4_5
->core_cache
->reg_list
[15].value
, 0, 32));
1278 /* wait for and process debug entry */
1279 xscale_debug_entry(target
);
1281 LOG_DEBUG("disable single-step");
1282 xscale_disable_single_step(target
);
1284 LOG_DEBUG("set breakpoint at 0x%8.8" PRIx32
"", breakpoint
->address
);
1285 xscale_set_breakpoint(target
, breakpoint
);
1289 /* enable any pending breakpoints and watchpoints */
1290 xscale_enable_breakpoints(target
);
1291 xscale_enable_watchpoints(target
);
1293 /* restore banked registers */
1294 retval
= xscale_restore_banked(target
);
1296 /* send resume request (command 0x30 or 0x31)
1297 * clean the trace buffer if it is to be enabled (0x62) */
1298 if (xscale
->trace
.buffer_enabled
)
1300 xscale_send_u32(target
, 0x62);
1301 xscale_send_u32(target
, 0x31);
1304 xscale_send_u32(target
, 0x30);
1307 xscale_send_u32(target
, buf_get_u32(armv4_5
->cpsr
->value
, 0, 32));
1308 LOG_DEBUG("writing cpsr with value 0x%8.8" PRIx32
,
1309 buf_get_u32(armv4_5
->cpsr
->value
, 0, 32));
1311 for (i
= 7; i
>= 0; i
--)
1314 xscale_send_u32(target
, buf_get_u32(armv4_5
->core_cache
->reg_list
[i
].value
, 0, 32));
1315 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));
1319 xscale_send_u32(target
, buf_get_u32(armv4_5
->core_cache
->reg_list
[15].value
, 0, 32));
1320 LOG_DEBUG("writing PC with value 0x%8.8" PRIx32
"", buf_get_u32(armv4_5
->core_cache
->reg_list
[15].value
, 0, 32));
1322 target
->debug_reason
= DBG_REASON_NOTHALTED
;
1324 if (!debug_execution
)
1326 /* registers are now invalid */
1327 register_cache_invalidate(armv4_5
->core_cache
);
1328 target
->state
= TARGET_RUNNING
;
1329 target_call_event_callbacks(target
, TARGET_EVENT_RESUMED
);
1333 target
->state
= TARGET_DEBUG_RUNNING
;
1334 target_call_event_callbacks(target
, TARGET_EVENT_DEBUG_RESUMED
);
1337 LOG_DEBUG("target resumed");
1342 static int xscale_step_inner(struct target
*target
, int current
,
1343 uint32_t address
, int handle_breakpoints
)
1345 struct xscale_common
*xscale
= target_to_xscale(target
);
1346 struct arm
*armv4_5
= &xscale
->armv4_5_common
;
1351 target
->debug_reason
= DBG_REASON_SINGLESTEP
;
1353 /* calculate PC of next instruction */
1354 if ((retval
= arm_simulate_step(target
, &next_pc
)) != ERROR_OK
)
1356 uint32_t current_opcode
, current_pc
;
1357 current_pc
= buf_get_u32(armv4_5
->core_cache
->reg_list
[15].value
, 0, 32);
1359 target_read_u32(target
, current_pc
, ¤t_opcode
);
1360 LOG_ERROR("BUG: couldn't calculate PC of next instruction, current opcode was 0x%8.8" PRIx32
"", current_opcode
);
1364 LOG_DEBUG("enable single-step");
1365 if ((retval
= xscale_enable_single_step(target
, next_pc
)) != ERROR_OK
)
1368 /* restore banked registers */
1369 if ((retval
= xscale_restore_banked(target
)) != ERROR_OK
)
1372 /* send resume request (command 0x30 or 0x31)
1373 * clean the trace buffer if it is to be enabled (0x62) */
1374 if (xscale
->trace
.buffer_enabled
)
1376 if ((retval
= xscale_send_u32(target
, 0x62)) != ERROR_OK
)
1378 if ((retval
= xscale_send_u32(target
, 0x31)) != ERROR_OK
)
1382 if ((retval
= xscale_send_u32(target
, 0x30)) != ERROR_OK
)
1386 retval
= xscale_send_u32(target
,
1387 buf_get_u32(armv4_5
->cpsr
->value
, 0, 32));
1388 if (retval
!= ERROR_OK
)
1390 LOG_DEBUG("writing cpsr with value 0x%8.8" PRIx32
,
1391 buf_get_u32(armv4_5
->cpsr
->value
, 0, 32));
1393 for (i
= 7; i
>= 0; i
--)
1396 if ((retval
= xscale_send_u32(target
, buf_get_u32(armv4_5
->core_cache
->reg_list
[i
].value
, 0, 32))) != ERROR_OK
)
1398 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));
1402 if ((retval
= xscale_send_u32(target
, buf_get_u32(armv4_5
->core_cache
->reg_list
[15].value
, 0, 32))) != ERROR_OK
)
1404 LOG_DEBUG("writing PC with value 0x%8.8" PRIx32
, buf_get_u32(armv4_5
->core_cache
->reg_list
[15].value
, 0, 32));
1406 target_call_event_callbacks(target
, TARGET_EVENT_RESUMED
);
1408 /* registers are now invalid */
1409 register_cache_invalidate(armv4_5
->core_cache
);
1411 /* wait for and process debug entry */
1412 if ((retval
= xscale_debug_entry(target
)) != ERROR_OK
)
1415 LOG_DEBUG("disable single-step");
1416 if ((retval
= xscale_disable_single_step(target
)) != ERROR_OK
)
1419 target_call_event_callbacks(target
, TARGET_EVENT_HALTED
);
1424 static int xscale_step(struct target
*target
, int current
,
1425 uint32_t address
, int handle_breakpoints
)
1427 struct arm
*armv4_5
= target_to_arm(target
);
1428 struct breakpoint
*breakpoint
= target
->breakpoints
;
1430 uint32_t current_pc
;
1433 if (target
->state
!= TARGET_HALTED
)
1435 LOG_WARNING("target not halted");
1436 return ERROR_TARGET_NOT_HALTED
;
1439 /* current = 1: continue on current pc, otherwise continue at <address> */
1441 buf_set_u32(armv4_5
->core_cache
->reg_list
[15].value
, 0, 32, address
);
1443 current_pc
= buf_get_u32(armv4_5
->core_cache
->reg_list
[15].value
, 0, 32);
1445 /* if we're at the reset vector, we have to simulate the step */
1446 if (current_pc
== 0x0)
1448 if ((retval
= arm_simulate_step(target
, NULL
)) != ERROR_OK
)
1450 current_pc
= buf_get_u32(armv4_5
->core_cache
->reg_list
[15].value
, 0, 32);
1452 target
->debug_reason
= DBG_REASON_SINGLESTEP
;
1453 target_call_event_callbacks(target
, TARGET_EVENT_HALTED
);
1458 /* the front-end may request us not to handle breakpoints */
1459 if (handle_breakpoints
)
1460 if ((breakpoint
= breakpoint_find(target
, buf_get_u32(armv4_5
->core_cache
->reg_list
[15].value
, 0, 32))))
1462 if ((retval
= xscale_unset_breakpoint(target
, breakpoint
)) != ERROR_OK
)
1466 retval
= xscale_step_inner(target
, current
, address
, handle_breakpoints
);
1470 xscale_set_breakpoint(target
, breakpoint
);
1473 LOG_DEBUG("target stepped");
1479 static int xscale_assert_reset(struct target
*target
)
1481 struct xscale_common
*xscale
= target_to_xscale(target
);
1483 LOG_DEBUG("target->state: %s",
1484 target_state_name(target
));
1486 /* select DCSR instruction (set endstate to R-T-I to ensure we don't
1487 * end up in T-L-R, which would reset JTAG
1489 jtag_set_end_state(TAP_IDLE
);
1490 xscale_jtag_set_instr(target
->tap
,
1491 XSCALE_SELDCSR
<< xscale
->xscale_variant
);
1493 /* set Hold reset, Halt mode and Trap Reset */
1494 buf_set_u32(xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].value
, 30, 1, 0x1);
1495 buf_set_u32(xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].value
, 16, 1, 0x1);
1496 xscale_write_dcsr(target
, 1, 0);
1498 /* select BYPASS, because having DCSR selected caused problems on the PXA27x */
1499 xscale_jtag_set_instr(target
->tap
, ~0);
1500 jtag_execute_queue();
1503 jtag_add_reset(0, 1);
1505 /* sleep 1ms, to be sure we fulfill any requirements */
1506 jtag_add_sleep(1000);
1507 jtag_execute_queue();
1509 target
->state
= TARGET_RESET
;
1511 if (target
->reset_halt
)
1514 if ((retval
= target_halt(target
)) != ERROR_OK
)
1521 static int xscale_deassert_reset(struct target
*target
)
1523 struct xscale_common
*xscale
= target_to_xscale(target
);
1524 struct breakpoint
*breakpoint
= target
->breakpoints
;
1528 xscale
->ibcr_available
= 2;
1529 xscale
->ibcr0_used
= 0;
1530 xscale
->ibcr1_used
= 0;
1532 xscale
->dbr_available
= 2;
1533 xscale
->dbr0_used
= 0;
1534 xscale
->dbr1_used
= 0;
1536 /* mark all hardware breakpoints as unset */
1539 if (breakpoint
->type
== BKPT_HARD
)
1541 breakpoint
->set
= 0;
1543 breakpoint
= breakpoint
->next
;
1546 register_cache_invalidate(xscale
->armv4_5_common
.core_cache
);
1548 /* FIXME mark hardware watchpoints got unset too. Also,
1549 * at least some of the XScale registers are invalid...
1553 * REVISIT: *assumes* we had a SRST+TRST reset so the mini-icache
1554 * contents got invalidated. Safer to force that, so writing new
1555 * contents can't ever fail..
1560 const uint8_t *buffer
= xscale_debug_handler
;
1564 jtag_add_reset(0, 0);
1566 /* wait 300ms; 150 and 100ms were not enough */
1567 jtag_add_sleep(300*1000);
1569 jtag_add_runtest(2030, jtag_set_end_state(TAP_IDLE
));
1570 jtag_execute_queue();
1572 /* set Hold reset, Halt mode and Trap Reset */
1573 buf_set_u32(xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].value
, 30, 1, 0x1);
1574 buf_set_u32(xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].value
, 16, 1, 0x1);
1575 xscale_write_dcsr(target
, 1, 0);
1577 /* Load the debug handler into the mini-icache. Since
1578 * it's using halt mode (not monitor mode), it runs in
1579 * "Special Debug State" for access to registers, memory,
1580 * coprocessors, trace data, etc.
1582 address
= xscale
->handler_address
;
1583 for (unsigned binary_size
= sizeof xscale_debug_handler
- 1;
1585 binary_size
-= buf_cnt
, buffer
+= buf_cnt
)
1587 uint32_t cache_line
[8];
1590 buf_cnt
= binary_size
;
1594 for (i
= 0; i
< buf_cnt
; i
+= 4)
1596 /* convert LE buffer to host-endian uint32_t */
1597 cache_line
[i
/ 4] = le_to_h_u32(&buffer
[i
]);
1600 for (; i
< 32; i
+= 4)
1602 cache_line
[i
/ 4] = 0xe1a08008;
1605 /* only load addresses other than the reset vectors */
1606 if ((address
% 0x400) != 0x0)
1608 retval
= xscale_load_ic(target
, address
,
1610 if (retval
!= ERROR_OK
)
1617 retval
= xscale_load_ic(target
, 0x0,
1618 xscale
->low_vectors
);
1619 if (retval
!= ERROR_OK
)
1621 retval
= xscale_load_ic(target
, 0xffff0000,
1622 xscale
->high_vectors
);
1623 if (retval
!= ERROR_OK
)
1626 jtag_add_runtest(30, jtag_set_end_state(TAP_IDLE
));
1628 jtag_add_sleep(100000);
1630 /* set Hold reset, Halt mode and Trap Reset */
1631 buf_set_u32(xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].value
, 30, 1, 0x1);
1632 buf_set_u32(xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].value
, 16, 1, 0x1);
1633 xscale_write_dcsr(target
, 1, 0);
1635 /* clear Hold reset to let the target run (should enter debug handler) */
1636 xscale_write_dcsr(target
, 0, 1);
1637 target
->state
= TARGET_RUNNING
;
1639 if (!target
->reset_halt
)
1641 jtag_add_sleep(10000);
1643 /* we should have entered debug now */
1644 xscale_debug_entry(target
);
1645 target
->state
= TARGET_HALTED
;
1647 /* resume the target */
1648 xscale_resume(target
, 1, 0x0, 1, 0);
1655 static int xscale_read_core_reg(struct target
*target
, struct reg
*r
,
1656 int num
, enum arm_mode mode
)
1658 /** \todo add debug handler support for core register reads */
1659 LOG_ERROR("not implemented");
1663 static int xscale_write_core_reg(struct target
*target
, struct reg
*r
,
1664 int num
, enum arm_mode mode
, uint32_t value
)
1666 /** \todo add debug handler support for core register writes */
1667 LOG_ERROR("not implemented");
1671 static int xscale_full_context(struct target
*target
)
1673 struct arm
*armv4_5
= target_to_arm(target
);
1681 if (target
->state
!= TARGET_HALTED
)
1683 LOG_WARNING("target not halted");
1684 return ERROR_TARGET_NOT_HALTED
;
1687 buffer
= malloc(4 * 8);
1689 /* iterate through processor modes (FIQ, IRQ, SVC, ABT, UND and SYS)
1690 * we can't enter User mode on an XScale (unpredictable),
1691 * but User shares registers with SYS
1693 for (i
= 1; i
< 7; i
++)
1695 enum arm_mode mode
= armv4_5_number_to_mode(i
);
1699 if (mode
== ARM_MODE_USR
)
1702 /* check if there are invalid registers in the current mode
1704 for (j
= 0; valid
&& j
<= 16; j
++)
1706 if (!ARMV4_5_CORE_REG_MODE(armv4_5
->core_cache
,
1713 /* request banked registers */
1714 xscale_send_u32(target
, 0x0);
1716 /* send CPSR for desired bank mode */
1717 xscale_send_u32(target
, mode
| 0xc0 /* I/F bits */);
1719 /* get banked registers: r8 to r14; and SPSR
1720 * except in USR/SYS mode
1722 if (mode
!= ARM_MODE_SYS
) {
1724 r
= &ARMV4_5_CORE_REG_MODE(armv4_5
->core_cache
,
1727 xscale_receive(target
, buffer
, 8);
1729 buf_set_u32(r
->value
, 0, 32, buffer
[7]);
1733 xscale_receive(target
, buffer
, 7);
1736 /* move data from buffer to register cache */
1737 for (j
= 8; j
<= 14; j
++)
1739 r
= &ARMV4_5_CORE_REG_MODE(armv4_5
->core_cache
,
1742 buf_set_u32(r
->value
, 0, 32, buffer
[j
- 8]);
1753 static int xscale_restore_banked(struct target
*target
)
1755 struct arm
*armv4_5
= target_to_arm(target
);
1759 if (target
->state
!= TARGET_HALTED
)
1761 LOG_WARNING("target not halted");
1762 return ERROR_TARGET_NOT_HALTED
;
1765 /* iterate through processor modes (FIQ, IRQ, SVC, ABT, UND and SYS)
1766 * and check if any banked registers need to be written. Ignore
1767 * USR mode (number 0) in favor of SYS; we can't enter User mode on
1768 * an XScale (unpredictable), but they share all registers.
1770 for (i
= 1; i
< 7; i
++)
1772 enum arm_mode mode
= armv4_5_number_to_mode(i
);
1775 if (mode
== ARM_MODE_USR
)
1778 /* check if there are dirty registers in this mode */
1779 for (j
= 8; j
<= 14; j
++)
1781 if (ARMV4_5_CORE_REG_MODE(armv4_5
->core_cache
,
1786 /* if not USR/SYS, check if the SPSR needs to be written */
1787 if (mode
!= ARM_MODE_SYS
)
1789 if (ARMV4_5_CORE_REG_MODE(armv4_5
->core_cache
,
1794 /* there's nothing to flush for this mode */
1798 /* command 0x1: "send banked registers" */
1799 xscale_send_u32(target
, 0x1);
1801 /* send CPSR for desired mode */
1802 xscale_send_u32(target
, mode
| 0xc0 /* I/F bits */);
1804 /* send r8 to r14/lr ... only FIQ needs more than r13..r14,
1805 * but this protocol doesn't understand that nuance.
1807 for (j
= 8; j
<= 14; j
++) {
1808 r
= &ARMV4_5_CORE_REG_MODE(armv4_5
->core_cache
,
1810 xscale_send_u32(target
, buf_get_u32(r
->value
, 0, 32));
1814 /* send spsr if not in USR/SYS mode */
1815 if (mode
!= ARM_MODE_SYS
) {
1816 r
= &ARMV4_5_CORE_REG_MODE(armv4_5
->core_cache
,
1818 xscale_send_u32(target
, buf_get_u32(r
->value
, 0, 32));
1826 static int xscale_read_memory(struct target
*target
, uint32_t address
,
1827 uint32_t size
, uint32_t count
, uint8_t *buffer
)
1829 struct xscale_common
*xscale
= target_to_xscale(target
);
1834 LOG_DEBUG("address: 0x%8.8" PRIx32
", size: 0x%8.8" PRIx32
", count: 0x%8.8" PRIx32
, address
, size
, count
);
1836 if (target
->state
!= TARGET_HALTED
)
1838 LOG_WARNING("target not halted");
1839 return ERROR_TARGET_NOT_HALTED
;
1842 /* sanitize arguments */
1843 if (((size
!= 4) && (size
!= 2) && (size
!= 1)) || (count
== 0) || !(buffer
))
1844 return ERROR_INVALID_ARGUMENTS
;
1846 if (((size
== 4) && (address
& 0x3u
)) || ((size
== 2) && (address
& 0x1u
)))
1847 return ERROR_TARGET_UNALIGNED_ACCESS
;
1849 /* send memory read request (command 0x1n, n: access size) */
1850 if ((retval
= xscale_send_u32(target
, 0x10 | size
)) != ERROR_OK
)
1853 /* send base address for read request */
1854 if ((retval
= xscale_send_u32(target
, address
)) != ERROR_OK
)
1857 /* send number of requested data words */
1858 if ((retval
= xscale_send_u32(target
, count
)) != ERROR_OK
)
1861 /* receive data from target (count times 32-bit words in host endianness) */
1862 buf32
= malloc(4 * count
);
1863 if ((retval
= xscale_receive(target
, buf32
, count
)) != ERROR_OK
)
1866 /* extract data from host-endian buffer into byte stream */
1867 for (i
= 0; i
< count
; i
++)
1872 target_buffer_set_u32(target
, buffer
, buf32
[i
]);
1876 target_buffer_set_u16(target
, buffer
, buf32
[i
] & 0xffff);
1880 *buffer
++ = buf32
[i
] & 0xff;
1883 LOG_ERROR("invalid read size");
1884 return ERROR_INVALID_ARGUMENTS
;
1890 /* examine DCSR, to see if Sticky Abort (SA) got set */
1891 if ((retval
= xscale_read_dcsr(target
)) != ERROR_OK
)
1893 if (buf_get_u32(xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].value
, 5, 1) == 1)
1896 if ((retval
= xscale_send_u32(target
, 0x60)) != ERROR_OK
)
1899 return ERROR_TARGET_DATA_ABORT
;
1905 static int xscale_read_phys_memory(struct target
*target
, uint32_t address
,
1906 uint32_t size
, uint32_t count
, uint8_t *buffer
)
1908 struct xscale_common
*xscale
= target_to_xscale(target
);
1910 /* with MMU inactive, there are only physical addresses */
1911 if (!xscale
->armv4_5_mmu
.mmu_enabled
)
1912 return xscale_read_memory(target
, address
, size
, count
, buffer
);
1914 /** \todo: provide a non-stub implementation of this routine. */
1915 LOG_ERROR("%s: %s is not implemented. Disable MMU?",
1916 target_name(target
), __func__
);
1920 static int xscale_write_memory(struct target
*target
, uint32_t address
,
1921 uint32_t size
, uint32_t count
, uint8_t *buffer
)
1923 struct xscale_common
*xscale
= target_to_xscale(target
);
1926 LOG_DEBUG("address: 0x%8.8" PRIx32
", size: 0x%8.8" PRIx32
", count: 0x%8.8" PRIx32
, address
, size
, count
);
1928 if (target
->state
!= TARGET_HALTED
)
1930 LOG_WARNING("target not halted");
1931 return ERROR_TARGET_NOT_HALTED
;
1934 /* sanitize arguments */
1935 if (((size
!= 4) && (size
!= 2) && (size
!= 1)) || (count
== 0) || !(buffer
))
1936 return ERROR_INVALID_ARGUMENTS
;
1938 if (((size
== 4) && (address
& 0x3u
)) || ((size
== 2) && (address
& 0x1u
)))
1939 return ERROR_TARGET_UNALIGNED_ACCESS
;
1941 /* send memory write request (command 0x2n, n: access size) */
1942 if ((retval
= xscale_send_u32(target
, 0x20 | size
)) != ERROR_OK
)
1945 /* send base address for read request */
1946 if ((retval
= xscale_send_u32(target
, address
)) != ERROR_OK
)
1949 /* send number of requested data words to be written*/
1950 if ((retval
= xscale_send_u32(target
, count
)) != ERROR_OK
)
1953 /* extract data from host-endian buffer into byte stream */
1955 for (i
= 0; i
< count
; i
++)
1960 value
= target_buffer_get_u32(target
, buffer
);
1961 xscale_send_u32(target
, value
);
1965 value
= target_buffer_get_u16(target
, buffer
);
1966 xscale_send_u32(target
, value
);
1971 xscale_send_u32(target
, value
);
1975 LOG_ERROR("should never get here");
1980 if ((retval
= xscale_send(target
, buffer
, count
, size
)) != ERROR_OK
)
1983 /* examine DCSR, to see if Sticky Abort (SA) got set */
1984 if ((retval
= xscale_read_dcsr(target
)) != ERROR_OK
)
1986 if (buf_get_u32(xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].value
, 5, 1) == 1)
1989 if ((retval
= xscale_send_u32(target
, 0x60)) != ERROR_OK
)
1992 return ERROR_TARGET_DATA_ABORT
;
1998 static int xscale_write_phys_memory(struct target
*target
, uint32_t address
,
1999 uint32_t size
, uint32_t count
, uint8_t *buffer
)
2001 struct xscale_common
*xscale
= target_to_xscale(target
);
2003 /* with MMU inactive, there are only physical addresses */
2004 if (!xscale
->armv4_5_mmu
.mmu_enabled
)
2005 return xscale_read_memory(target
, address
, size
, count
, buffer
);
2007 /** \todo: provide a non-stub implementation of this routine. */
2008 LOG_ERROR("%s: %s is not implemented. Disable MMU?",
2009 target_name(target
), __func__
);
2013 static int xscale_bulk_write_memory(struct target
*target
, uint32_t address
,
2014 uint32_t count
, uint8_t *buffer
)
2016 return xscale_write_memory(target
, address
, 4, count
, buffer
);
2019 static uint32_t xscale_get_ttb(struct target
*target
)
2021 struct xscale_common
*xscale
= target_to_xscale(target
);
2024 xscale_get_reg(&xscale
->reg_cache
->reg_list
[XSCALE_TTB
]);
2025 ttb
= buf_get_u32(xscale
->reg_cache
->reg_list
[XSCALE_TTB
].value
, 0, 32);
2030 static void xscale_disable_mmu_caches(struct target
*target
, int mmu
,
2031 int d_u_cache
, int i_cache
)
2033 struct xscale_common
*xscale
= target_to_xscale(target
);
2034 uint32_t cp15_control
;
2036 /* read cp15 control register */
2037 xscale_get_reg(&xscale
->reg_cache
->reg_list
[XSCALE_CTRL
]);
2038 cp15_control
= buf_get_u32(xscale
->reg_cache
->reg_list
[XSCALE_CTRL
].value
, 0, 32);
2041 cp15_control
&= ~0x1U
;
2046 xscale_send_u32(target
, 0x50);
2047 xscale_send_u32(target
, xscale
->cache_clean_address
);
2049 /* invalidate DCache */
2050 xscale_send_u32(target
, 0x51);
2052 cp15_control
&= ~0x4U
;
2057 /* invalidate ICache */
2058 xscale_send_u32(target
, 0x52);
2059 cp15_control
&= ~0x1000U
;
2062 /* write new cp15 control register */
2063 xscale_set_reg_u32(&xscale
->reg_cache
->reg_list
[XSCALE_CTRL
], cp15_control
);
2065 /* execute cpwait to ensure outstanding operations complete */
2066 xscale_send_u32(target
, 0x53);
2069 static void xscale_enable_mmu_caches(struct target
*target
, int mmu
,
2070 int d_u_cache
, int i_cache
)
2072 struct xscale_common
*xscale
= target_to_xscale(target
);
2073 uint32_t cp15_control
;
2075 /* read cp15 control register */
2076 xscale_get_reg(&xscale
->reg_cache
->reg_list
[XSCALE_CTRL
]);
2077 cp15_control
= buf_get_u32(xscale
->reg_cache
->reg_list
[XSCALE_CTRL
].value
, 0, 32);
2080 cp15_control
|= 0x1U
;
2083 cp15_control
|= 0x4U
;
2086 cp15_control
|= 0x1000U
;
2088 /* write new cp15 control register */
2089 xscale_set_reg_u32(&xscale
->reg_cache
->reg_list
[XSCALE_CTRL
], cp15_control
);
2091 /* execute cpwait to ensure outstanding operations complete */
2092 xscale_send_u32(target
, 0x53);
2095 static int xscale_set_breakpoint(struct target
*target
,
2096 struct breakpoint
*breakpoint
)
2099 struct xscale_common
*xscale
= target_to_xscale(target
);
2101 if (target
->state
!= TARGET_HALTED
)
2103 LOG_WARNING("target not halted");
2104 return ERROR_TARGET_NOT_HALTED
;
2107 if (breakpoint
->set
)
2109 LOG_WARNING("breakpoint already set");
2113 if (breakpoint
->type
== BKPT_HARD
)
2115 uint32_t value
= breakpoint
->address
| 1;
2116 if (!xscale
->ibcr0_used
)
2118 xscale_set_reg_u32(&xscale
->reg_cache
->reg_list
[XSCALE_IBCR0
], value
);
2119 xscale
->ibcr0_used
= 1;
2120 breakpoint
->set
= 1; /* breakpoint set on first breakpoint register */
2122 else if (!xscale
->ibcr1_used
)
2124 xscale_set_reg_u32(&xscale
->reg_cache
->reg_list
[XSCALE_IBCR1
], value
);
2125 xscale
->ibcr1_used
= 1;
2126 breakpoint
->set
= 2; /* breakpoint set on second breakpoint register */
2130 LOG_ERROR("BUG: no hardware comparator available");
2134 else if (breakpoint
->type
== BKPT_SOFT
)
2136 if (breakpoint
->length
== 4)
2138 /* keep the original instruction in target endianness */
2139 if ((retval
= target_read_memory(target
, breakpoint
->address
, 4, 1, breakpoint
->orig_instr
)) != ERROR_OK
)
2143 /* write the original instruction in target endianness (arm7_9->arm_bkpt is host endian) */
2144 if ((retval
= target_write_u32(target
, breakpoint
->address
, xscale
->arm_bkpt
)) != ERROR_OK
)
2151 /* keep the original instruction in target endianness */
2152 if ((retval
= target_read_memory(target
, breakpoint
->address
, 2, 1, breakpoint
->orig_instr
)) != ERROR_OK
)
2156 /* write the original instruction in target endianness (arm7_9->arm_bkpt is host endian) */
2157 if ((retval
= target_write_u32(target
, breakpoint
->address
, xscale
->thumb_bkpt
)) != ERROR_OK
)
2162 breakpoint
->set
= 1;
2168 static int xscale_add_breakpoint(struct target
*target
,
2169 struct breakpoint
*breakpoint
)
2171 struct xscale_common
*xscale
= target_to_xscale(target
);
2173 if ((breakpoint
->type
== BKPT_HARD
) && (xscale
->ibcr_available
< 1))
2175 LOG_INFO("no breakpoint unit available for hardware breakpoint");
2176 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
2179 if ((breakpoint
->length
!= 2) && (breakpoint
->length
!= 4))
2181 LOG_INFO("only breakpoints of two (Thumb) or four (ARM) bytes length supported");
2182 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
2185 if (breakpoint
->type
== BKPT_HARD
)
2187 xscale
->ibcr_available
--;
2193 static int xscale_unset_breakpoint(struct target
*target
,
2194 struct breakpoint
*breakpoint
)
2197 struct xscale_common
*xscale
= target_to_xscale(target
);
2199 if (target
->state
!= TARGET_HALTED
)
2201 LOG_WARNING("target not halted");
2202 return ERROR_TARGET_NOT_HALTED
;
2205 if (!breakpoint
->set
)
2207 LOG_WARNING("breakpoint not set");
2211 if (breakpoint
->type
== BKPT_HARD
)
2213 if (breakpoint
->set
== 1)
2215 xscale_set_reg_u32(&xscale
->reg_cache
->reg_list
[XSCALE_IBCR0
], 0x0);
2216 xscale
->ibcr0_used
= 0;
2218 else if (breakpoint
->set
== 2)
2220 xscale_set_reg_u32(&xscale
->reg_cache
->reg_list
[XSCALE_IBCR1
], 0x0);
2221 xscale
->ibcr1_used
= 0;
2223 breakpoint
->set
= 0;
2227 /* restore original instruction (kept in target endianness) */
2228 if (breakpoint
->length
== 4)
2230 if ((retval
= target_write_memory(target
, breakpoint
->address
, 4, 1, breakpoint
->orig_instr
)) != ERROR_OK
)
2237 if ((retval
= target_write_memory(target
, breakpoint
->address
, 2, 1, breakpoint
->orig_instr
)) != ERROR_OK
)
2242 breakpoint
->set
= 0;
2248 static int xscale_remove_breakpoint(struct target
*target
, struct breakpoint
*breakpoint
)
2250 struct xscale_common
*xscale
= target_to_xscale(target
);
2252 if (target
->state
!= TARGET_HALTED
)
2254 LOG_WARNING("target not halted");
2255 return ERROR_TARGET_NOT_HALTED
;
2258 if (breakpoint
->set
)
2260 xscale_unset_breakpoint(target
, breakpoint
);
2263 if (breakpoint
->type
== BKPT_HARD
)
2264 xscale
->ibcr_available
++;
2269 static int xscale_set_watchpoint(struct target
*target
,
2270 struct watchpoint
*watchpoint
)
2272 struct xscale_common
*xscale
= target_to_xscale(target
);
2274 struct reg
*dbcon
= &xscale
->reg_cache
->reg_list
[XSCALE_DBCON
];
2275 uint32_t dbcon_value
= buf_get_u32(dbcon
->value
, 0, 32);
2277 if (target
->state
!= TARGET_HALTED
)
2279 LOG_WARNING("target not halted");
2280 return ERROR_TARGET_NOT_HALTED
;
2283 xscale_get_reg(dbcon
);
2285 switch (watchpoint
->rw
)
2297 LOG_ERROR("BUG: watchpoint->rw neither read, write nor access");
2300 if (!xscale
->dbr0_used
)
2302 xscale_set_reg_u32(&xscale
->reg_cache
->reg_list
[XSCALE_DBR0
], watchpoint
->address
);
2303 dbcon_value
|= enable
;
2304 xscale_set_reg_u32(dbcon
, dbcon_value
);
2305 watchpoint
->set
= 1;
2306 xscale
->dbr0_used
= 1;
2308 else if (!xscale
->dbr1_used
)
2310 xscale_set_reg_u32(&xscale
->reg_cache
->reg_list
[XSCALE_DBR1
], watchpoint
->address
);
2311 dbcon_value
|= enable
<< 2;
2312 xscale_set_reg_u32(dbcon
, dbcon_value
);
2313 watchpoint
->set
= 2;
2314 xscale
->dbr1_used
= 1;
2318 LOG_ERROR("BUG: no hardware comparator available");
2325 static int xscale_add_watchpoint(struct target
*target
,
2326 struct watchpoint
*watchpoint
)
2328 struct xscale_common
*xscale
= target_to_xscale(target
);
2330 if (xscale
->dbr_available
< 1)
2332 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
2335 if ((watchpoint
->length
!= 1) && (watchpoint
->length
!= 2) && (watchpoint
->length
!= 4))
2337 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
2340 xscale
->dbr_available
--;
2345 static int xscale_unset_watchpoint(struct target
*target
,
2346 struct watchpoint
*watchpoint
)
2348 struct xscale_common
*xscale
= target_to_xscale(target
);
2349 struct reg
*dbcon
= &xscale
->reg_cache
->reg_list
[XSCALE_DBCON
];
2350 uint32_t dbcon_value
= buf_get_u32(dbcon
->value
, 0, 32);
2352 if (target
->state
!= TARGET_HALTED
)
2354 LOG_WARNING("target not halted");
2355 return ERROR_TARGET_NOT_HALTED
;
2358 if (!watchpoint
->set
)
2360 LOG_WARNING("breakpoint not set");
2364 if (watchpoint
->set
== 1)
2366 dbcon_value
&= ~0x3;
2367 xscale_set_reg_u32(dbcon
, dbcon_value
);
2368 xscale
->dbr0_used
= 0;
2370 else if (watchpoint
->set
== 2)
2372 dbcon_value
&= ~0xc;
2373 xscale_set_reg_u32(dbcon
, dbcon_value
);
2374 xscale
->dbr1_used
= 0;
2376 watchpoint
->set
= 0;
2381 static int xscale_remove_watchpoint(struct target
*target
, struct watchpoint
*watchpoint
)
2383 struct xscale_common
*xscale
= target_to_xscale(target
);
2385 if (target
->state
!= TARGET_HALTED
)
2387 LOG_WARNING("target not halted");
2388 return ERROR_TARGET_NOT_HALTED
;
2391 if (watchpoint
->set
)
2393 xscale_unset_watchpoint(target
, watchpoint
);
2396 xscale
->dbr_available
++;
2401 static int xscale_get_reg(struct reg
*reg
)
2403 struct xscale_reg
*arch_info
= reg
->arch_info
;
2404 struct target
*target
= arch_info
->target
;
2405 struct xscale_common
*xscale
= target_to_xscale(target
);
2407 /* DCSR, TX and RX are accessible via JTAG */
2408 if (strcmp(reg
->name
, "XSCALE_DCSR") == 0)
2410 return xscale_read_dcsr(arch_info
->target
);
2412 else if (strcmp(reg
->name
, "XSCALE_TX") == 0)
2414 /* 1 = consume register content */
2415 return xscale_read_tx(arch_info
->target
, 1);
2417 else if (strcmp(reg
->name
, "XSCALE_RX") == 0)
2419 /* can't read from RX register (host -> debug handler) */
2422 else if (strcmp(reg
->name
, "XSCALE_TXRXCTRL") == 0)
2424 /* can't (explicitly) read from TXRXCTRL register */
2427 else /* Other DBG registers have to be transfered by the debug handler */
2429 /* send CP read request (command 0x40) */
2430 xscale_send_u32(target
, 0x40);
2432 /* send CP register number */
2433 xscale_send_u32(target
, arch_info
->dbg_handler_number
);
2435 /* read register value */
2436 xscale_read_tx(target
, 1);
2437 buf_cpy(xscale
->reg_cache
->reg_list
[XSCALE_TX
].value
, reg
->value
, 32);
2446 static int xscale_set_reg(struct reg
*reg
, uint8_t* buf
)
2448 struct xscale_reg
*arch_info
= reg
->arch_info
;
2449 struct target
*target
= arch_info
->target
;
2450 struct xscale_common
*xscale
= target_to_xscale(target
);
2451 uint32_t value
= buf_get_u32(buf
, 0, 32);
2453 /* DCSR, TX and RX are accessible via JTAG */
2454 if (strcmp(reg
->name
, "XSCALE_DCSR") == 0)
2456 buf_set_u32(xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].value
, 0, 32, value
);
2457 return xscale_write_dcsr(arch_info
->target
, -1, -1);
2459 else if (strcmp(reg
->name
, "XSCALE_RX") == 0)
2461 buf_set_u32(xscale
->reg_cache
->reg_list
[XSCALE_RX
].value
, 0, 32, value
);
2462 return xscale_write_rx(arch_info
->target
);
2464 else if (strcmp(reg
->name
, "XSCALE_TX") == 0)
2466 /* can't write to TX register (debug-handler -> host) */
2469 else if (strcmp(reg
->name
, "XSCALE_TXRXCTRL") == 0)
2471 /* can't (explicitly) write to TXRXCTRL register */
2474 else /* Other DBG registers have to be transfered by the debug handler */
2476 /* send CP write request (command 0x41) */
2477 xscale_send_u32(target
, 0x41);
2479 /* send CP register number */
2480 xscale_send_u32(target
, arch_info
->dbg_handler_number
);
2482 /* send CP register value */
2483 xscale_send_u32(target
, value
);
2484 buf_set_u32(reg
->value
, 0, 32, value
);
2490 static int xscale_write_dcsr_sw(struct target
*target
, uint32_t value
)
2492 struct xscale_common
*xscale
= target_to_xscale(target
);
2493 struct reg
*dcsr
= &xscale
->reg_cache
->reg_list
[XSCALE_DCSR
];
2494 struct xscale_reg
*dcsr_arch_info
= dcsr
->arch_info
;
2496 /* send CP write request (command 0x41) */
2497 xscale_send_u32(target
, 0x41);
2499 /* send CP register number */
2500 xscale_send_u32(target
, dcsr_arch_info
->dbg_handler_number
);
2502 /* send CP register value */
2503 xscale_send_u32(target
, value
);
2504 buf_set_u32(dcsr
->value
, 0, 32, value
);
2509 static int xscale_read_trace(struct target
*target
)
2511 struct xscale_common
*xscale
= target_to_xscale(target
);
2512 struct arm
*armv4_5
= &xscale
->armv4_5_common
;
2513 struct xscale_trace_data
**trace_data_p
;
2515 /* 258 words from debug handler
2516 * 256 trace buffer entries
2517 * 2 checkpoint addresses
2519 uint32_t trace_buffer
[258];
2520 int is_address
[256];
2523 if (target
->state
!= TARGET_HALTED
)
2525 LOG_WARNING("target must be stopped to read trace data");
2526 return ERROR_TARGET_NOT_HALTED
;
2529 /* send read trace buffer command (command 0x61) */
2530 xscale_send_u32(target
, 0x61);
2532 /* receive trace buffer content */
2533 xscale_receive(target
, trace_buffer
, 258);
2535 /* parse buffer backwards to identify address entries */
2536 for (i
= 255; i
>= 0; i
--)
2539 if (((trace_buffer
[i
] & 0xf0) == 0x90) ||
2540 ((trace_buffer
[i
] & 0xf0) == 0xd0))
2543 is_address
[--i
] = 1;
2545 is_address
[--i
] = 1;
2547 is_address
[--i
] = 1;
2549 is_address
[--i
] = 1;
2554 /* search first non-zero entry */
2555 for (j
= 0; (j
< 256) && (trace_buffer
[j
] == 0) && (!is_address
[j
]); j
++)
2560 LOG_DEBUG("no trace data collected");
2561 return ERROR_XSCALE_NO_TRACE_DATA
;
2564 for (trace_data_p
= &xscale
->trace
.data
; *trace_data_p
; trace_data_p
= &(*trace_data_p
)->next
)
2567 *trace_data_p
= malloc(sizeof(struct xscale_trace_data
));
2568 (*trace_data_p
)->next
= NULL
;
2569 (*trace_data_p
)->chkpt0
= trace_buffer
[256];
2570 (*trace_data_p
)->chkpt1
= trace_buffer
[257];
2571 (*trace_data_p
)->last_instruction
= buf_get_u32(armv4_5
->core_cache
->reg_list
[15].value
, 0, 32);
2572 (*trace_data_p
)->entries
= malloc(sizeof(struct xscale_trace_entry
) * (256 - j
));
2573 (*trace_data_p
)->depth
= 256 - j
;
2575 for (i
= j
; i
< 256; i
++)
2577 (*trace_data_p
)->entries
[i
- j
].data
= trace_buffer
[i
];
2579 (*trace_data_p
)->entries
[i
- j
].type
= XSCALE_TRACE_ADDRESS
;
2581 (*trace_data_p
)->entries
[i
- j
].type
= XSCALE_TRACE_MESSAGE
;
2587 static int xscale_read_instruction(struct target
*target
,
2588 struct arm_instruction
*instruction
)
2590 struct xscale_common
*xscale
= target_to_xscale(target
);
2597 if (!xscale
->trace
.image
)
2598 return ERROR_TRACE_IMAGE_UNAVAILABLE
;
2600 /* search for the section the current instruction belongs to */
2601 for (i
= 0; i
< xscale
->trace
.image
->num_sections
; i
++)
2603 if ((xscale
->trace
.image
->sections
[i
].base_address
<= xscale
->trace
.current_pc
) &&
2604 (xscale
->trace
.image
->sections
[i
].base_address
+ xscale
->trace
.image
->sections
[i
].size
> xscale
->trace
.current_pc
))
2613 /* current instruction couldn't be found in the image */
2614 return ERROR_TRACE_INSTRUCTION_UNAVAILABLE
;
2617 if (xscale
->trace
.core_state
== ARM_STATE_ARM
)
2620 if ((retval
= image_read_section(xscale
->trace
.image
, section
,
2621 xscale
->trace
.current_pc
- xscale
->trace
.image
->sections
[section
].base_address
,
2622 4, buf
, &size_read
)) != ERROR_OK
)
2624 LOG_ERROR("error while reading instruction: %i", retval
);
2625 return ERROR_TRACE_INSTRUCTION_UNAVAILABLE
;
2627 opcode
= target_buffer_get_u32(target
, buf
);
2628 arm_evaluate_opcode(opcode
, xscale
->trace
.current_pc
, instruction
);
2630 else if (xscale
->trace
.core_state
== ARM_STATE_THUMB
)
2633 if ((retval
= image_read_section(xscale
->trace
.image
, section
,
2634 xscale
->trace
.current_pc
- xscale
->trace
.image
->sections
[section
].base_address
,
2635 2, buf
, &size_read
)) != ERROR_OK
)
2637 LOG_ERROR("error while reading instruction: %i", retval
);
2638 return ERROR_TRACE_INSTRUCTION_UNAVAILABLE
;
2640 opcode
= target_buffer_get_u16(target
, buf
);
2641 thumb_evaluate_opcode(opcode
, xscale
->trace
.current_pc
, instruction
);
2645 LOG_ERROR("BUG: unknown core state encountered");
2652 static int xscale_branch_address(struct xscale_trace_data
*trace_data
,
2653 int i
, uint32_t *target
)
2655 /* if there are less than four entries prior to the indirect branch message
2656 * we can't extract the address */
2662 *target
= (trace_data
->entries
[i
-1].data
) | (trace_data
->entries
[i
-2].data
<< 8) |
2663 (trace_data
->entries
[i
-3].data
<< 16) | (trace_data
->entries
[i
-4].data
<< 24);
2668 static int xscale_analyze_trace(struct target
*target
, struct command_context
*cmd_ctx
)
2670 struct xscale_common
*xscale
= target_to_xscale(target
);
2672 uint32_t next_pc
= 0x0;
2673 struct xscale_trace_data
*trace_data
= xscale
->trace
.data
;
2682 xscale
->trace
.core_state
= ARM_STATE_ARM
;
2687 for (i
= 0; i
< trace_data
->depth
; i
++)
2693 if (trace_data
->entries
[i
].type
== XSCALE_TRACE_ADDRESS
)
2696 switch ((trace_data
->entries
[i
].data
& 0xf0) >> 4)
2698 case 0: /* Exceptions */
2706 exception
= (trace_data
->entries
[i
].data
& 0x70) >> 4;
2708 next_pc
= (trace_data
->entries
[i
].data
& 0xf0) >> 2;
2709 command_print(cmd_ctx
, "--- exception %i ---", (trace_data
->entries
[i
].data
& 0xf0) >> 4);
2711 case 8: /* Direct Branch */
2714 case 9: /* Indirect Branch */
2716 if (xscale_branch_address(trace_data
, i
, &next_pc
) == 0)
2721 case 13: /* Checkpointed Indirect Branch */
2722 if (xscale_branch_address(trace_data
, i
, &next_pc
) == 0)
2725 if (((chkpt
== 0) && (next_pc
!= trace_data
->chkpt0
))
2726 || ((chkpt
== 1) && (next_pc
!= trace_data
->chkpt1
)))
2727 LOG_WARNING("checkpointed indirect branch target address doesn't match checkpoint");
2729 /* explicit fall-through */
2730 case 12: /* Checkpointed Direct Branch */
2735 next_pc
= trace_data
->chkpt0
;
2738 else if (chkpt
== 1)
2741 next_pc
= trace_data
->chkpt0
;
2746 LOG_WARNING("more than two checkpointed branches encountered");
2749 case 15: /* Roll-over */
2752 default: /* Reserved */
2753 command_print(cmd_ctx
, "--- reserved trace message ---");
2754 LOG_ERROR("BUG: trace message %i is reserved", (trace_data
->entries
[i
].data
& 0xf0) >> 4);
2758 if (xscale
->trace
.pc_ok
)
2760 int executed
= (trace_data
->entries
[i
].data
& 0xf) + rollover
* 16;
2761 struct arm_instruction instruction
;
2763 if ((exception
== 6) || (exception
== 7))
2765 /* IRQ or FIQ exception, no instruction executed */
2769 while (executed
-- >= 0)
2771 if ((retval
= xscale_read_instruction(target
, &instruction
)) != ERROR_OK
)
2773 /* can't continue tracing with no image available */
2774 if (retval
== ERROR_TRACE_IMAGE_UNAVAILABLE
)
2778 else if (retval
== ERROR_TRACE_INSTRUCTION_UNAVAILABLE
)
2780 /* TODO: handle incomplete images */
2784 /* a precise abort on a load to the PC is included in the incremental
2785 * word count, other instructions causing data aborts are not included
2787 if ((executed
== 0) && (exception
== 4)
2788 && ((instruction
.type
>= ARM_LDR
) && (instruction
.type
<= ARM_LDM
)))
2790 if ((instruction
.type
== ARM_LDM
)
2791 && ((instruction
.info
.load_store_multiple
.register_list
& 0x8000) == 0))
2795 else if (((instruction
.type
>= ARM_LDR
) && (instruction
.type
<= ARM_LDRSH
))
2796 && (instruction
.info
.load_store
.Rd
!= 15))
2802 /* only the last instruction executed
2803 * (the one that caused the control flow change)
2804 * could be a taken branch
2806 if (((executed
== -1) && (branch
== 1)) &&
2807 (((instruction
.type
== ARM_B
) ||
2808 (instruction
.type
== ARM_BL
) ||
2809 (instruction
.type
== ARM_BLX
)) &&
2810 (instruction
.info
.b_bl_bx_blx
.target_address
!= 0xffffffff)))
2812 xscale
->trace
.current_pc
= instruction
.info
.b_bl_bx_blx
.target_address
;
2816 xscale
->trace
.current_pc
+= (xscale
->trace
.core_state
== ARM_STATE_ARM
) ? 4 : 2;
2818 command_print(cmd_ctx
, "%s", instruction
.text
);
2826 xscale
->trace
.current_pc
= next_pc
;
2827 xscale
->trace
.pc_ok
= 1;
2831 for (; xscale
->trace
.current_pc
< trace_data
->last_instruction
; xscale
->trace
.current_pc
+= (xscale
->trace
.core_state
== ARM_STATE_ARM
) ? 4 : 2)
2833 struct arm_instruction instruction
;
2834 if ((retval
= xscale_read_instruction(target
, &instruction
)) != ERROR_OK
)
2836 /* can't continue tracing with no image available */
2837 if (retval
== ERROR_TRACE_IMAGE_UNAVAILABLE
)
2841 else if (retval
== ERROR_TRACE_INSTRUCTION_UNAVAILABLE
)
2843 /* TODO: handle incomplete images */
2846 command_print(cmd_ctx
, "%s", instruction
.text
);
2849 trace_data
= trace_data
->next
;
2855 static const struct reg_arch_type xscale_reg_type
= {
2856 .get
= xscale_get_reg
,
2857 .set
= xscale_set_reg
,
2860 static void xscale_build_reg_cache(struct target
*target
)
2862 struct xscale_common
*xscale
= target_to_xscale(target
);
2863 struct arm
*armv4_5
= &xscale
->armv4_5_common
;
2864 struct reg_cache
**cache_p
= register_get_last_cache_p(&target
->reg_cache
);
2865 struct xscale_reg
*arch_info
= malloc(sizeof(xscale_reg_arch_info
));
2867 int num_regs
= ARRAY_SIZE(xscale_reg_arch_info
);
2869 (*cache_p
) = arm_build_reg_cache(target
, armv4_5
);
2871 (*cache_p
)->next
= malloc(sizeof(struct reg_cache
));
2872 cache_p
= &(*cache_p
)->next
;
2874 /* fill in values for the xscale reg cache */
2875 (*cache_p
)->name
= "XScale registers";
2876 (*cache_p
)->next
= NULL
;
2877 (*cache_p
)->reg_list
= malloc(num_regs
* sizeof(struct reg
));
2878 (*cache_p
)->num_regs
= num_regs
;
2880 for (i
= 0; i
< num_regs
; i
++)
2882 (*cache_p
)->reg_list
[i
].name
= xscale_reg_list
[i
];
2883 (*cache_p
)->reg_list
[i
].value
= calloc(4, 1);
2884 (*cache_p
)->reg_list
[i
].dirty
= 0;
2885 (*cache_p
)->reg_list
[i
].valid
= 0;
2886 (*cache_p
)->reg_list
[i
].size
= 32;
2887 (*cache_p
)->reg_list
[i
].arch_info
= &arch_info
[i
];
2888 (*cache_p
)->reg_list
[i
].type
= &xscale_reg_type
;
2889 arch_info
[i
] = xscale_reg_arch_info
[i
];
2890 arch_info
[i
].target
= target
;
2893 xscale
->reg_cache
= (*cache_p
);
2896 static int xscale_init_target(struct command_context
*cmd_ctx
,
2897 struct target
*target
)
2899 xscale_build_reg_cache(target
);
2903 static int xscale_init_arch_info(struct target
*target
,
2904 struct xscale_common
*xscale
, struct jtag_tap
*tap
, const char *variant
)
2906 struct arm
*armv4_5
;
2907 uint32_t high_reset_branch
, low_reset_branch
;
2910 armv4_5
= &xscale
->armv4_5_common
;
2912 /* store architecture specfic data */
2913 xscale
->common_magic
= XSCALE_COMMON_MAGIC
;
2915 /* we don't really *need* a variant param ... */
2919 if (strcmp(variant
, "pxa250") == 0
2920 || strcmp(variant
, "pxa255") == 0
2921 || strcmp(variant
, "pxa26x") == 0)
2923 else if (strcmp(variant
, "pxa27x") == 0
2924 || strcmp(variant
, "ixp42x") == 0
2925 || strcmp(variant
, "ixp45x") == 0
2926 || strcmp(variant
, "ixp46x") == 0)
2928 else if (strcmp(variant
, "pxa3xx") == 0)
2931 LOG_WARNING("%s: unrecognized variant %s",
2932 tap
->dotted_name
, variant
);
2934 if (ir_length
&& ir_length
!= tap
->ir_length
) {
2935 LOG_WARNING("%s: IR length for %s is %d; fixing",
2936 tap
->dotted_name
, variant
, ir_length
);
2937 tap
->ir_length
= ir_length
;
2941 /* PXA3xx shifts the JTAG instructions */
2942 if (tap
->ir_length
== 11)
2943 xscale
->xscale_variant
= XSCALE_PXA3XX
;
2945 xscale
->xscale_variant
= XSCALE_IXP4XX_PXA2XX
;
2947 /* the debug handler isn't installed (and thus not running) at this time */
2948 xscale
->handler_address
= 0xfe000800;
2950 /* clear the vectors we keep locally for reference */
2951 memset(xscale
->low_vectors
, 0, sizeof(xscale
->low_vectors
));
2952 memset(xscale
->high_vectors
, 0, sizeof(xscale
->high_vectors
));
2954 /* no user-specified vectors have been configured yet */
2955 xscale
->static_low_vectors_set
= 0x0;
2956 xscale
->static_high_vectors_set
= 0x0;
2958 /* calculate branches to debug handler */
2959 low_reset_branch
= (xscale
->handler_address
+ 0x20 - 0x0 - 0x8) >> 2;
2960 high_reset_branch
= (xscale
->handler_address
+ 0x20 - 0xffff0000 - 0x8) >> 2;
2962 xscale
->low_vectors
[0] = ARMV4_5_B((low_reset_branch
& 0xffffff), 0);
2963 xscale
->high_vectors
[0] = ARMV4_5_B((high_reset_branch
& 0xffffff), 0);
2965 for (i
= 1; i
<= 7; i
++)
2967 xscale
->low_vectors
[i
] = ARMV4_5_B(0xfffffe, 0);
2968 xscale
->high_vectors
[i
] = ARMV4_5_B(0xfffffe, 0);
2971 /* 64kB aligned region used for DCache cleaning */
2972 xscale
->cache_clean_address
= 0xfffe0000;
2974 xscale
->hold_rst
= 0;
2975 xscale
->external_debug_break
= 0;
2977 xscale
->ibcr_available
= 2;
2978 xscale
->ibcr0_used
= 0;
2979 xscale
->ibcr1_used
= 0;
2981 xscale
->dbr_available
= 2;
2982 xscale
->dbr0_used
= 0;
2983 xscale
->dbr1_used
= 0;
2985 LOG_INFO("%s: hardware has 2 breakpoints and 2 watchpoints",
2986 target_name(target
));
2988 xscale
->arm_bkpt
= ARMV5_BKPT(0x0);
2989 xscale
->thumb_bkpt
= ARMV5_T_BKPT(0x0) & 0xffff;
2991 xscale
->vector_catch
= 0x1;
2993 xscale
->trace
.capture_status
= TRACE_IDLE
;
2994 xscale
->trace
.data
= NULL
;
2995 xscale
->trace
.image
= NULL
;
2996 xscale
->trace
.buffer_enabled
= 0;
2997 xscale
->trace
.buffer_fill
= 0;
2999 /* prepare ARMv4/5 specific information */
3000 armv4_5
->arch_info
= xscale
;
3001 armv4_5
->read_core_reg
= xscale_read_core_reg
;
3002 armv4_5
->write_core_reg
= xscale_write_core_reg
;
3003 armv4_5
->full_context
= xscale_full_context
;
3005 arm_init_arch_info(target
, armv4_5
);
3007 xscale
->armv4_5_mmu
.armv4_5_cache
.ctype
= -1;
3008 xscale
->armv4_5_mmu
.get_ttb
= xscale_get_ttb
;
3009 xscale
->armv4_5_mmu
.read_memory
= xscale_read_memory
;
3010 xscale
->armv4_5_mmu
.write_memory
= xscale_write_memory
;
3011 xscale
->armv4_5_mmu
.disable_mmu_caches
= xscale_disable_mmu_caches
;
3012 xscale
->armv4_5_mmu
.enable_mmu_caches
= xscale_enable_mmu_caches
;
3013 xscale
->armv4_5_mmu
.has_tiny_pages
= 1;
3014 xscale
->armv4_5_mmu
.mmu_enabled
= 0;
3019 static int xscale_target_create(struct target
*target
, Jim_Interp
*interp
)
3021 struct xscale_common
*xscale
;
3023 if (sizeof xscale_debug_handler
- 1 > 0x800) {
3024 LOG_ERROR("debug_handler.bin: larger than 2kb");
3028 xscale
= calloc(1, sizeof(*xscale
));
3032 return xscale_init_arch_info(target
, xscale
, target
->tap
,
3036 COMMAND_HANDLER(xscale_handle_debug_handler_command
)
3038 struct target
*target
= NULL
;
3039 struct xscale_common
*xscale
;
3041 uint32_t handler_address
;
3045 LOG_ERROR("'xscale debug_handler <target#> <address>' command takes two required operands");
3049 if ((target
= get_target(CMD_ARGV
[0])) == NULL
)
3051 LOG_ERROR("target '%s' not defined", CMD_ARGV
[0]);
3055 xscale
= target_to_xscale(target
);
3056 retval
= xscale_verify_pointer(CMD_CTX
, xscale
);
3057 if (retval
!= ERROR_OK
)
3060 COMMAND_PARSE_NUMBER(u32
, CMD_ARGV
[1], handler_address
);
3062 if (((handler_address
>= 0x800) && (handler_address
<= 0x1fef800)) ||
3063 ((handler_address
>= 0xfe000800) && (handler_address
<= 0xfffff800)))
3065 xscale
->handler_address
= handler_address
;
3069 LOG_ERROR("xscale debug_handler <address> must be between 0x800 and 0x1fef800 or between 0xfe000800 and 0xfffff800");
3076 COMMAND_HANDLER(xscale_handle_cache_clean_address_command
)
3078 struct target
*target
= NULL
;
3079 struct xscale_common
*xscale
;
3081 uint32_t cache_clean_address
;
3085 return ERROR_COMMAND_SYNTAX_ERROR
;
3088 target
= get_target(CMD_ARGV
[0]);
3091 LOG_ERROR("target '%s' not defined", CMD_ARGV
[0]);
3094 xscale
= target_to_xscale(target
);
3095 retval
= xscale_verify_pointer(CMD_CTX
, xscale
);
3096 if (retval
!= ERROR_OK
)
3099 COMMAND_PARSE_NUMBER(u32
, CMD_ARGV
[1], cache_clean_address
);
3101 if (cache_clean_address
& 0xffff)
3103 LOG_ERROR("xscale cache_clean_address <address> must be 64kb aligned");
3107 xscale
->cache_clean_address
= cache_clean_address
;
3113 COMMAND_HANDLER(xscale_handle_cache_info_command
)
3115 struct target
*target
= get_current_target(CMD_CTX
);
3116 struct xscale_common
*xscale
= target_to_xscale(target
);
3119 retval
= xscale_verify_pointer(CMD_CTX
, xscale
);
3120 if (retval
!= ERROR_OK
)
3123 return armv4_5_handle_cache_info_command(CMD_CTX
, &xscale
->armv4_5_mmu
.armv4_5_cache
);
3126 static int xscale_virt2phys(struct target
*target
,
3127 uint32_t virtual, uint32_t *physical
)
3129 struct xscale_common
*xscale
= target_to_xscale(target
);
3135 if (xscale
->common_magic
!= XSCALE_COMMON_MAGIC
) {
3136 LOG_ERROR(xscale_not
);
3137 return ERROR_TARGET_INVALID
;
3140 uint32_t ret
= armv4_5_mmu_translate_va(target
, &xscale
->armv4_5_mmu
, virtual, &type
, &cb
, &domain
, &ap
);
3149 static int xscale_mmu(struct target
*target
, int *enabled
)
3151 struct xscale_common
*xscale
= target_to_xscale(target
);
3153 if (target
->state
!= TARGET_HALTED
)
3155 LOG_ERROR("Target not halted");
3156 return ERROR_TARGET_INVALID
;
3158 *enabled
= xscale
->armv4_5_mmu
.mmu_enabled
;
3162 COMMAND_HANDLER(xscale_handle_mmu_command
)
3164 struct target
*target
= get_current_target(CMD_CTX
);
3165 struct xscale_common
*xscale
= target_to_xscale(target
);
3168 retval
= xscale_verify_pointer(CMD_CTX
, xscale
);
3169 if (retval
!= ERROR_OK
)
3172 if (target
->state
!= TARGET_HALTED
)
3174 command_print(CMD_CTX
, "target must be stopped for \"%s\" command", CMD_NAME
);
3181 COMMAND_PARSE_ENABLE(CMD_ARGV
[0], enable
);
3183 xscale_enable_mmu_caches(target
, 1, 0, 0);
3185 xscale_disable_mmu_caches(target
, 1, 0, 0);
3186 xscale
->armv4_5_mmu
.mmu_enabled
= enable
;
3189 command_print(CMD_CTX
, "mmu %s", (xscale
->armv4_5_mmu
.mmu_enabled
) ? "enabled" : "disabled");
3194 COMMAND_HANDLER(xscale_handle_idcache_command
)
3196 struct target
*target
= get_current_target(CMD_CTX
);
3197 struct xscale_common
*xscale
= target_to_xscale(target
);
3199 int retval
= xscale_verify_pointer(CMD_CTX
, xscale
);
3200 if (retval
!= ERROR_OK
)
3203 if (target
->state
!= TARGET_HALTED
)
3205 command_print(CMD_CTX
, "target must be stopped for \"%s\" command", CMD_NAME
);
3210 COMMAND_PARSE_BOOL(CMD_NAME
, icache
, "icache", "dcache");
3215 COMMAND_PARSE_ENABLE(CMD_ARGV
[0], enable
);
3217 xscale_enable_mmu_caches(target
, 1, 0, 0);
3219 xscale_disable_mmu_caches(target
, 1, 0, 0);
3221 xscale
->armv4_5_mmu
.armv4_5_cache
.i_cache_enabled
= enable
;
3223 xscale
->armv4_5_mmu
.armv4_5_cache
.d_u_cache_enabled
= enable
;
3226 bool enabled
= icache
?
3227 xscale
->armv4_5_mmu
.armv4_5_cache
.i_cache_enabled
:
3228 xscale
->armv4_5_mmu
.armv4_5_cache
.d_u_cache_enabled
;
3229 const char *msg
= enabled
? "enabled" : "disabled";
3230 command_print(CMD_CTX
, "%s %s", CMD_NAME
, msg
);
3235 COMMAND_HANDLER(xscale_handle_vector_catch_command
)
3237 struct target
*target
= get_current_target(CMD_CTX
);
3238 struct xscale_common
*xscale
= target_to_xscale(target
);
3241 retval
= xscale_verify_pointer(CMD_CTX
, xscale
);
3242 if (retval
!= ERROR_OK
)
3247 command_print(CMD_CTX
, "usage: xscale vector_catch [mask]");
3251 COMMAND_PARSE_NUMBER(u8
, CMD_ARGV
[0], xscale
->vector_catch
);
3252 buf_set_u32(xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].value
, 16, 8, xscale
->vector_catch
);
3253 xscale_write_dcsr(target
, -1, -1);
3256 command_print(CMD_CTX
, "vector catch mask: 0x%2.2x", xscale
->vector_catch
);
3262 COMMAND_HANDLER(xscale_handle_vector_table_command
)
3264 struct target
*target
= get_current_target(CMD_CTX
);
3265 struct xscale_common
*xscale
= target_to_xscale(target
);
3269 retval
= xscale_verify_pointer(CMD_CTX
, xscale
);
3270 if (retval
!= ERROR_OK
)
3273 if (CMD_ARGC
== 0) /* print current settings */
3277 command_print(CMD_CTX
, "active user-set static vectors:");
3278 for (idx
= 1; idx
< 8; idx
++)
3279 if (xscale
->static_low_vectors_set
& (1 << idx
))
3280 command_print(CMD_CTX
, "low %d: 0x%" PRIx32
, idx
, xscale
->static_low_vectors
[idx
]);
3281 for (idx
= 1; idx
< 8; idx
++)
3282 if (xscale
->static_high_vectors_set
& (1 << idx
))
3283 command_print(CMD_CTX
, "high %d: 0x%" PRIx32
, idx
, xscale
->static_high_vectors
[idx
]);
3292 COMMAND_PARSE_NUMBER(int, CMD_ARGV
[1], idx
);
3294 COMMAND_PARSE_NUMBER(u32
, CMD_ARGV
[2], vec
);
3296 if (idx
< 1 || idx
>= 8)
3299 if (!err
&& strcmp(CMD_ARGV
[0], "low") == 0)
3301 xscale
->static_low_vectors_set
|= (1<<idx
);
3302 xscale
->static_low_vectors
[idx
] = vec
;
3304 else if (!err
&& (strcmp(CMD_ARGV
[0], "high") == 0))
3306 xscale
->static_high_vectors_set
|= (1<<idx
);
3307 xscale
->static_high_vectors
[idx
] = vec
;
3314 command_print(CMD_CTX
, "usage: xscale vector_table <high|low> <index> <code>");
3320 COMMAND_HANDLER(xscale_handle_trace_buffer_command
)
3322 struct target
*target
= get_current_target(CMD_CTX
);
3323 struct xscale_common
*xscale
= target_to_xscale(target
);
3324 struct arm
*armv4_5
= &xscale
->armv4_5_common
;
3325 uint32_t dcsr_value
;
3328 retval
= xscale_verify_pointer(CMD_CTX
, xscale
);
3329 if (retval
!= ERROR_OK
)
3332 if (target
->state
!= TARGET_HALTED
)
3334 command_print(CMD_CTX
, "target must be stopped for \"%s\" command", CMD_NAME
);
3338 if ((CMD_ARGC
>= 1) && (strcmp("enable", CMD_ARGV
[0]) == 0))
3340 struct xscale_trace_data
*td
, *next_td
;
3341 xscale
->trace
.buffer_enabled
= 1;
3343 /* free old trace data */
3344 td
= xscale
->trace
.data
;
3354 xscale
->trace
.data
= NULL
;
3356 else if ((CMD_ARGC
>= 1) && (strcmp("disable", CMD_ARGV
[0]) == 0))
3358 xscale
->trace
.buffer_enabled
= 0;
3361 if ((CMD_ARGC
>= 2) && (strcmp("fill", CMD_ARGV
[1]) == 0))
3365 COMMAND_PARSE_NUMBER(u32
, CMD_ARGV
[2], fill
);
3366 xscale
->trace
.buffer_fill
= fill
;
3368 else if ((CMD_ARGC
>= 2) && (strcmp("wrap", CMD_ARGV
[1]) == 0))
3370 xscale
->trace
.buffer_fill
= -1;
3373 if (xscale
->trace
.buffer_enabled
)
3375 /* if we enable the trace buffer in fill-once
3376 * mode we know the address of the first instruction */
3377 xscale
->trace
.pc_ok
= 1;
3378 xscale
->trace
.current_pc
= buf_get_u32(armv4_5
->core_cache
->reg_list
[15].value
, 0, 32);
3382 /* otherwise the address is unknown, and we have no known good PC */
3383 xscale
->trace
.pc_ok
= 0;
3386 command_print(CMD_CTX
, "trace buffer %s (%s)",
3387 (xscale
->trace
.buffer_enabled
) ? "enabled" : "disabled",
3388 (xscale
->trace
.buffer_fill
> 0) ? "fill" : "wrap");
3390 dcsr_value
= buf_get_u32(xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].value
, 0, 32);
3391 if (xscale
->trace
.buffer_fill
>= 0)
3392 xscale_write_dcsr_sw(target
, (dcsr_value
& 0xfffffffc) | 2);
3394 xscale_write_dcsr_sw(target
, dcsr_value
& 0xfffffffc);
3399 COMMAND_HANDLER(xscale_handle_trace_image_command
)
3401 struct target
*target
= get_current_target(CMD_CTX
);
3402 struct xscale_common
*xscale
= target_to_xscale(target
);
3407 command_print(CMD_CTX
, "usage: xscale trace_image <file> [base address] [type]");
3411 retval
= xscale_verify_pointer(CMD_CTX
, xscale
);
3412 if (retval
!= ERROR_OK
)
3415 if (xscale
->trace
.image
)
3417 image_close(xscale
->trace
.image
);
3418 free(xscale
->trace
.image
);
3419 command_print(CMD_CTX
, "previously loaded image found and closed");
3422 xscale
->trace
.image
= malloc(sizeof(struct image
));
3423 xscale
->trace
.image
->base_address_set
= 0;
3424 xscale
->trace
.image
->start_address_set
= 0;
3426 /* a base address isn't always necessary, default to 0x0 (i.e. don't relocate) */
3429 xscale
->trace
.image
->base_address_set
= 1;
3430 COMMAND_PARSE_NUMBER(int, CMD_ARGV
[1], xscale
->trace
.image
->base_address
);
3434 xscale
->trace
.image
->base_address_set
= 0;
3437 if (image_open(xscale
->trace
.image
, CMD_ARGV
[0], (CMD_ARGC
>= 3) ? CMD_ARGV
[2] : NULL
) != ERROR_OK
)
3439 free(xscale
->trace
.image
);
3440 xscale
->trace
.image
= NULL
;
3447 COMMAND_HANDLER(xscale_handle_dump_trace_command
)
3449 struct target
*target
= get_current_target(CMD_CTX
);
3450 struct xscale_common
*xscale
= target_to_xscale(target
);
3451 struct xscale_trace_data
*trace_data
;
3455 retval
= xscale_verify_pointer(CMD_CTX
, xscale
);
3456 if (retval
!= ERROR_OK
)
3459 if (target
->state
!= TARGET_HALTED
)
3461 command_print(CMD_CTX
, "target must be stopped for \"%s\" command", CMD_NAME
);
3467 command_print(CMD_CTX
, "usage: xscale dump_trace <file>");
3471 trace_data
= xscale
->trace
.data
;
3475 command_print(CMD_CTX
, "no trace data collected");
3479 if (fileio_open(&file
, CMD_ARGV
[0], FILEIO_WRITE
, FILEIO_BINARY
) != ERROR_OK
)
3488 fileio_write_u32(&file
, trace_data
->chkpt0
);
3489 fileio_write_u32(&file
, trace_data
->chkpt1
);
3490 fileio_write_u32(&file
, trace_data
->last_instruction
);
3491 fileio_write_u32(&file
, trace_data
->depth
);
3493 for (i
= 0; i
< trace_data
->depth
; i
++)
3494 fileio_write_u32(&file
, trace_data
->entries
[i
].data
| ((trace_data
->entries
[i
].type
& 0xffff) << 16));
3496 trace_data
= trace_data
->next
;
3499 fileio_close(&file
);
3504 COMMAND_HANDLER(xscale_handle_analyze_trace_buffer_command
)
3506 struct target
*target
= get_current_target(CMD_CTX
);
3507 struct xscale_common
*xscale
= target_to_xscale(target
);
3510 retval
= xscale_verify_pointer(CMD_CTX
, xscale
);
3511 if (retval
!= ERROR_OK
)
3514 xscale_analyze_trace(target
, CMD_CTX
);
3519 COMMAND_HANDLER(xscale_handle_cp15
)
3521 struct target
*target
= get_current_target(CMD_CTX
);
3522 struct xscale_common
*xscale
= target_to_xscale(target
);
3525 retval
= xscale_verify_pointer(CMD_CTX
, xscale
);
3526 if (retval
!= ERROR_OK
)
3529 if (target
->state
!= TARGET_HALTED
)
3531 command_print(CMD_CTX
, "target must be stopped for \"%s\" command", CMD_NAME
);
3534 uint32_t reg_no
= 0;
3535 struct reg
*reg
= NULL
;
3538 COMMAND_PARSE_NUMBER(u32
, CMD_ARGV
[0], reg_no
);
3539 /*translate from xscale cp15 register no to openocd register*/
3543 reg_no
= XSCALE_MAINID
;
3546 reg_no
= XSCALE_CTRL
;
3549 reg_no
= XSCALE_TTB
;
3552 reg_no
= XSCALE_DAC
;
3555 reg_no
= XSCALE_FSR
;
3558 reg_no
= XSCALE_FAR
;
3561 reg_no
= XSCALE_PID
;
3564 reg_no
= XSCALE_CPACCESS
;
3567 command_print(CMD_CTX
, "invalid register number");
3568 return ERROR_INVALID_ARGUMENTS
;
3570 reg
= &xscale
->reg_cache
->reg_list
[reg_no
];
3577 /* read cp15 control register */
3578 xscale_get_reg(reg
);
3579 value
= buf_get_u32(reg
->value
, 0, 32);
3580 command_print(CMD_CTX
, "%s (/%i): 0x%" PRIx32
"", reg
->name
, (int)(reg
->size
), value
);
3582 else if (CMD_ARGC
== 2)
3585 COMMAND_PARSE_NUMBER(u32
, CMD_ARGV
[1], value
);
3587 /* send CP write request (command 0x41) */
3588 xscale_send_u32(target
, 0x41);
3590 /* send CP register number */
3591 xscale_send_u32(target
, reg_no
);
3593 /* send CP register value */
3594 xscale_send_u32(target
, value
);
3596 /* execute cpwait to ensure outstanding operations complete */
3597 xscale_send_u32(target
, 0x53);
3601 command_print(CMD_CTX
, "usage: cp15 [register]<, [value]>");
3607 static const struct command_registration xscale_exec_command_handlers
[] = {
3609 .name
= "cache_info",
3610 .handler
= xscale_handle_cache_info_command
,
3611 .mode
= COMMAND_EXEC
,
3612 .help
= "display information about CPU caches",
3616 .handler
= xscale_handle_mmu_command
,
3617 .mode
= COMMAND_EXEC
,
3618 .help
= "enable or disable the MMU",
3619 .usage
= "['enable'|'disable']",
3623 .handler
= xscale_handle_idcache_command
,
3624 .mode
= COMMAND_EXEC
,
3625 .help
= "display ICache state, optionally enabling or "
3627 .usage
= "['enable'|'disable']",
3631 .handler
= xscale_handle_idcache_command
,
3632 .mode
= COMMAND_EXEC
,
3633 .help
= "display DCache state, optionally enabling or "
3635 .usage
= "['enable'|'disable']",
3638 .name
= "vector_catch",
3639 .handler
= xscale_handle_vector_catch_command
,
3640 .mode
= COMMAND_EXEC
,
3641 .help
= "set or display 8-bit mask of vectors "
3642 "that should trigger debug entry",
3646 .name
= "vector_table",
3647 .handler
= xscale_handle_vector_table_command
,
3648 .mode
= COMMAND_EXEC
,
3649 .help
= "set vector table entry in mini-ICache, "
3650 "or display current tables",
3651 .usage
= "[('high'|'low') index code]",
3654 .name
= "trace_buffer",
3655 .handler
= xscale_handle_trace_buffer_command
,
3656 .mode
= COMMAND_EXEC
,
3657 .help
= "display trace buffer status, enable or disable "
3658 "tracing, and optionally reconfigure trace mode",
3659 .usage
= "['enable'|'disable' ['fill' number|'wrap']]",
3662 .name
= "dump_trace",
3663 .handler
= xscale_handle_dump_trace_command
,
3664 .mode
= COMMAND_EXEC
,
3665 .help
= "dump content of trace buffer to file",
3666 .usage
= "filename",
3669 .name
= "analyze_trace",
3670 .handler
= xscale_handle_analyze_trace_buffer_command
,
3671 .mode
= COMMAND_EXEC
,
3672 .help
= "analyze content of trace buffer",
3676 .name
= "trace_image",
3677 .handler
= xscale_handle_trace_image_command
,
3678 .mode
= COMMAND_EXEC
,
3679 .help
= "load image from file to address (default 0)",
3680 .usage
= "filename [offset [filetype]]",
3684 .handler
= xscale_handle_cp15
,
3685 .mode
= COMMAND_EXEC
,
3686 .help
= "Read or write coprocessor 15 register.",
3687 .usage
= "register [value]",
3689 COMMAND_REGISTRATION_DONE
3691 static const struct command_registration xscale_any_command_handlers
[] = {
3693 .name
= "debug_handler",
3694 .handler
= xscale_handle_debug_handler_command
,
3695 .mode
= COMMAND_ANY
,
3696 .help
= "Change address used for debug handler.",
3697 .usage
= "target address",
3700 .name
= "cache_clean_address",
3701 .handler
= xscale_handle_cache_clean_address_command
,
3702 .mode
= COMMAND_ANY
,
3703 .help
= "Change address used for cleaning data cache.",
3707 .chain
= xscale_exec_command_handlers
,
3709 COMMAND_REGISTRATION_DONE
3711 static const struct command_registration xscale_command_handlers
[] = {
3713 .chain
= arm_command_handlers
,
3717 .mode
= COMMAND_ANY
,
3718 .help
= "xscale command group",
3719 .chain
= xscale_any_command_handlers
,
3721 COMMAND_REGISTRATION_DONE
3724 struct target_type xscale_target
=
3728 .poll
= xscale_poll
,
3729 .arch_state
= xscale_arch_state
,
3731 .target_request_data
= NULL
,
3733 .halt
= xscale_halt
,
3734 .resume
= xscale_resume
,
3735 .step
= xscale_step
,
3737 .assert_reset
= xscale_assert_reset
,
3738 .deassert_reset
= xscale_deassert_reset
,
3739 .soft_reset_halt
= NULL
,
3741 /* REVISIT on some cores, allow exporting iwmmxt registers ... */
3742 .get_gdb_reg_list
= arm_get_gdb_reg_list
,
3744 .read_memory
= xscale_read_memory
,
3745 .read_phys_memory
= xscale_read_phys_memory
,
3746 .write_memory
= xscale_write_memory
,
3747 .write_phys_memory
= xscale_write_phys_memory
,
3748 .bulk_write_memory
= xscale_bulk_write_memory
,
3750 .checksum_memory
= arm_checksum_memory
,
3751 .blank_check_memory
= arm_blank_check_memory
,
3753 .run_algorithm
= armv4_5_run_algorithm
,
3755 .add_breakpoint
= xscale_add_breakpoint
,
3756 .remove_breakpoint
= xscale_remove_breakpoint
,
3757 .add_watchpoint
= xscale_add_watchpoint
,
3758 .remove_watchpoint
= xscale_remove_watchpoint
,
3760 .commands
= xscale_command_handlers
,
3761 .target_create
= xscale_target_create
,
3762 .init_target
= xscale_init_target
,
3764 .virt2phys
= xscale_virt2phys
,