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 "time_support.h"
42 * Important XScale documents available as of October 2009 include:
44 * Intel XScale® Core Developer’s Manual, January 2004
45 * Order Number: 273473-002
46 * This has a chapter detailing debug facilities, and punts some
47 * details to chip-specific microarchitecture documents.
49 * Hot-Debug for Intel XScale® Core Debug White Paper, May 2005
50 * Document Number: 273539-005
51 * Less detailed than the developer's manual, but summarizes those
52 * missing details (for most XScales) and gives LOTS of notes about
53 * debugger/handler interaction issues. Presents a simpler reset
54 * and load-handler sequence than the arch doc. (Note, OpenOCD
55 * doesn't currently support "Hot-Debug" as defined there.)
57 * Chip-specific microarchitecture documents may also be useful.
61 /* forward declarations */
62 static int xscale_resume(struct target
*, int current
,
63 uint32_t address
, int handle_breakpoints
, int debug_execution
);
64 static int xscale_debug_entry(struct target
*);
65 static int xscale_restore_context(struct target
*);
66 static int xscale_get_reg(struct reg
*reg
);
67 static int xscale_set_reg(struct reg
*reg
, uint8_t *buf
);
68 static int xscale_set_breakpoint(struct target
*, struct breakpoint
*);
69 static int xscale_set_watchpoint(struct target
*, struct watchpoint
*);
70 static int xscale_unset_breakpoint(struct target
*, struct breakpoint
*);
71 static int xscale_read_trace(struct target
*);
74 /* This XScale "debug handler" is loaded into the processor's
75 * mini-ICache, which is 2K of code writable only via JTAG.
77 * FIXME the OpenOCD "bin2char" utility currently doesn't handle
78 * binary files cleanly. It's string oriented, and terminates them
79 * with a NUL character. Better would be to generate the constants
80 * and let other code decide names, scoping, and other housekeeping.
82 static /* unsigned const char xscale_debug_handler[] = ... */
83 #include "xscale_debug.h"
85 static char *const xscale_reg_list
[] =
87 "XSCALE_MAINID", /* 0 */
97 "XSCALE_IBCR0", /* 10 */
107 "XSCALE_RX", /* 20 */
111 static const struct xscale_reg xscale_reg_arch_info
[] =
113 {XSCALE_MAINID
, NULL
},
114 {XSCALE_CACHETYPE
, NULL
},
116 {XSCALE_AUXCTRL
, NULL
},
122 {XSCALE_CPACCESS
, NULL
},
123 {XSCALE_IBCR0
, NULL
},
124 {XSCALE_IBCR1
, NULL
},
127 {XSCALE_DBCON
, NULL
},
128 {XSCALE_TBREG
, NULL
},
129 {XSCALE_CHKPT0
, NULL
},
130 {XSCALE_CHKPT1
, NULL
},
131 {XSCALE_DCSR
, NULL
}, /* DCSR accessed via JTAG or SW */
132 {-1, NULL
}, /* TX accessed via JTAG */
133 {-1, NULL
}, /* RX accessed via JTAG */
134 {-1, NULL
}, /* TXRXCTRL implicit access via JTAG */
137 /* convenience wrapper to access XScale specific registers */
138 static int xscale_set_reg_u32(struct reg
*reg
, uint32_t value
)
142 buf_set_u32(buf
, 0, 32, value
);
144 return xscale_set_reg(reg
, buf
);
147 static const char xscale_not
[] = "target is not an XScale";
149 static int xscale_verify_pointer(struct command_context
*cmd_ctx
,
150 struct xscale_common
*xscale
)
152 if (xscale
->common_magic
!= XSCALE_COMMON_MAGIC
) {
153 command_print(cmd_ctx
, xscale_not
);
154 return ERROR_TARGET_INVALID
;
159 static int xscale_jtag_set_instr(struct jtag_tap
*tap
, uint32_t new_instr
)
164 if (buf_get_u32(tap
->cur_instr
, 0, tap
->ir_length
) != new_instr
)
166 struct scan_field field
;
169 memset(&field
, 0, sizeof field
);
171 field
.num_bits
= tap
->ir_length
;
172 field
.out_value
= scratch
;
173 buf_set_u32(field
.out_value
, 0, field
.num_bits
, new_instr
);
175 jtag_add_ir_scan(1, &field
, jtag_get_end_state());
181 static int xscale_read_dcsr(struct target
*target
)
183 struct xscale_common
*xscale
= target_to_xscale(target
);
185 struct scan_field fields
[3];
186 uint8_t field0
= 0x0;
187 uint8_t field0_check_value
= 0x2;
188 uint8_t field0_check_mask
= 0x7;
189 uint8_t field2
= 0x0;
190 uint8_t field2_check_value
= 0x0;
191 uint8_t field2_check_mask
= 0x1;
193 jtag_set_end_state(TAP_DRPAUSE
);
194 xscale_jtag_set_instr(target
->tap
,
195 XSCALE_SELDCSR
<< xscale
->xscale_variant
);
197 buf_set_u32(&field0
, 1, 1, xscale
->hold_rst
);
198 buf_set_u32(&field0
, 2, 1, xscale
->external_debug_break
);
200 memset(&fields
, 0, sizeof fields
);
202 fields
[0].tap
= target
->tap
;
203 fields
[0].num_bits
= 3;
204 fields
[0].out_value
= &field0
;
206 fields
[0].in_value
= &tmp
;
208 fields
[1].tap
= target
->tap
;
209 fields
[1].num_bits
= 32;
210 fields
[1].in_value
= xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].value
;
212 fields
[2].tap
= target
->tap
;
213 fields
[2].num_bits
= 1;
214 fields
[2].out_value
= &field2
;
216 fields
[2].in_value
= &tmp2
;
218 jtag_add_dr_scan(3, fields
, jtag_get_end_state());
220 jtag_check_value_mask(fields
+ 0, &field0_check_value
, &field0_check_mask
);
221 jtag_check_value_mask(fields
+ 2, &field2_check_value
, &field2_check_mask
);
223 if ((retval
= jtag_execute_queue()) != ERROR_OK
)
225 LOG_ERROR("JTAG error while reading DCSR");
229 xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].dirty
= 0;
230 xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].valid
= 1;
232 /* write the register with the value we just read
233 * on this second pass, only the first bit of field0 is guaranteed to be 0)
235 field0_check_mask
= 0x1;
236 fields
[1].out_value
= xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].value
;
237 fields
[1].in_value
= NULL
;
239 jtag_set_end_state(TAP_IDLE
);
241 jtag_add_dr_scan(3, fields
, jtag_get_end_state());
243 /* DANGER!!! this must be here. It will make sure that the arguments
244 * to jtag_set_check_value() does not go out of scope! */
245 return jtag_execute_queue();
249 static void xscale_getbuf(jtag_callback_data_t arg
)
251 uint8_t *in
= (uint8_t *)arg
;
252 *((uint32_t *)in
) = buf_get_u32(in
, 0, 32);
255 static int xscale_receive(struct target
*target
, uint32_t *buffer
, int num_words
)
258 return ERROR_INVALID_ARGUMENTS
;
260 struct xscale_common
*xscale
= target_to_xscale(target
);
261 int retval
= ERROR_OK
;
263 struct scan_field fields
[3];
264 uint8_t *field0
= malloc(num_words
* 1);
265 uint8_t field0_check_value
= 0x2;
266 uint8_t field0_check_mask
= 0x6;
267 uint32_t *field1
= malloc(num_words
* 4);
268 uint8_t field2_check_value
= 0x0;
269 uint8_t field2_check_mask
= 0x1;
271 int words_scheduled
= 0;
274 path
[0] = TAP_DRSELECT
;
275 path
[1] = TAP_DRCAPTURE
;
276 path
[2] = TAP_DRSHIFT
;
278 memset(&fields
, 0, sizeof fields
);
280 fields
[0].tap
= target
->tap
;
281 fields
[0].num_bits
= 3;
282 fields
[0].check_value
= &field0_check_value
;
283 fields
[0].check_mask
= &field0_check_mask
;
285 fields
[1].tap
= target
->tap
;
286 fields
[1].num_bits
= 32;
288 fields
[2].tap
= target
->tap
;
289 fields
[2].num_bits
= 1;
290 fields
[2].check_value
= &field2_check_value
;
291 fields
[2].check_mask
= &field2_check_mask
;
293 jtag_set_end_state(TAP_IDLE
);
294 xscale_jtag_set_instr(target
->tap
,
295 XSCALE_DBGTX
<< xscale
->xscale_variant
);
296 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 */
298 /* repeat until all words have been collected */
300 while (words_done
< num_words
)
304 for (i
= words_done
; i
< num_words
; i
++)
306 fields
[0].in_value
= &field0
[i
];
308 jtag_add_pathmove(3, path
);
310 fields
[1].in_value
= (uint8_t *)(field1
+ i
);
312 jtag_add_dr_scan_check(3, fields
, jtag_set_end_state(TAP_IDLE
));
314 jtag_add_callback(xscale_getbuf
, (jtag_callback_data_t
)(field1
+ i
));
319 if ((retval
= jtag_execute_queue()) != ERROR_OK
)
321 LOG_ERROR("JTAG error while receiving data from debug handler");
325 /* examine results */
326 for (i
= words_done
; i
< num_words
; i
++)
328 if (!(field0
[0] & 1))
330 /* move backwards if necessary */
332 for (j
= i
; j
< num_words
- 1; j
++)
334 field0
[j
] = field0
[j
+ 1];
335 field1
[j
] = field1
[j
+ 1];
340 if (words_scheduled
== 0)
342 if (attempts
++==1000)
344 LOG_ERROR("Failed to receiving data from debug handler after 1000 attempts");
345 retval
= ERROR_TARGET_TIMEOUT
;
350 words_done
+= words_scheduled
;
353 for (i
= 0; i
< num_words
; i
++)
354 *(buffer
++) = buf_get_u32((uint8_t*)&field1
[i
], 0, 32);
361 static int xscale_read_tx(struct target
*target
, int consume
)
363 struct xscale_common
*xscale
= target_to_xscale(target
);
365 tap_state_t noconsume_path
[6];
367 struct timeval timeout
, now
;
368 struct scan_field fields
[3];
369 uint8_t field0_in
= 0x0;
370 uint8_t field0_check_value
= 0x2;
371 uint8_t field0_check_mask
= 0x6;
372 uint8_t field2_check_value
= 0x0;
373 uint8_t field2_check_mask
= 0x1;
375 jtag_set_end_state(TAP_IDLE
);
377 xscale_jtag_set_instr(target
->tap
,
378 XSCALE_DBGTX
<< xscale
->xscale_variant
);
380 path
[0] = TAP_DRSELECT
;
381 path
[1] = TAP_DRCAPTURE
;
382 path
[2] = TAP_DRSHIFT
;
384 noconsume_path
[0] = TAP_DRSELECT
;
385 noconsume_path
[1] = TAP_DRCAPTURE
;
386 noconsume_path
[2] = TAP_DREXIT1
;
387 noconsume_path
[3] = TAP_DRPAUSE
;
388 noconsume_path
[4] = TAP_DREXIT2
;
389 noconsume_path
[5] = TAP_DRSHIFT
;
391 memset(&fields
, 0, sizeof fields
);
393 fields
[0].tap
= target
->tap
;
394 fields
[0].num_bits
= 3;
395 fields
[0].in_value
= &field0_in
;
397 fields
[1].tap
= target
->tap
;
398 fields
[1].num_bits
= 32;
399 fields
[1].in_value
= xscale
->reg_cache
->reg_list
[XSCALE_TX
].value
;
401 fields
[2].tap
= target
->tap
;
402 fields
[2].num_bits
= 1;
404 fields
[2].in_value
= &tmp
;
406 gettimeofday(&timeout
, NULL
);
407 timeval_add_time(&timeout
, 1, 0);
411 /* if we want to consume the register content (i.e. clear TX_READY),
412 * we have to go straight from Capture-DR to Shift-DR
413 * otherwise, we go from Capture-DR to Exit1-DR to Pause-DR
416 jtag_add_pathmove(3, path
);
419 jtag_add_pathmove(ARRAY_SIZE(noconsume_path
), noconsume_path
);
422 jtag_add_dr_scan(3, fields
, jtag_set_end_state(TAP_IDLE
));
424 jtag_check_value_mask(fields
+ 0, &field0_check_value
, &field0_check_mask
);
425 jtag_check_value_mask(fields
+ 2, &field2_check_value
, &field2_check_mask
);
427 if ((retval
= jtag_execute_queue()) != ERROR_OK
)
429 LOG_ERROR("JTAG error while reading TX");
430 return ERROR_TARGET_TIMEOUT
;
433 gettimeofday(&now
, NULL
);
434 if ((now
.tv_sec
> timeout
.tv_sec
) || ((now
.tv_sec
== timeout
.tv_sec
)&& (now
.tv_usec
> timeout
.tv_usec
)))
436 LOG_ERROR("time out reading TX register");
437 return ERROR_TARGET_TIMEOUT
;
439 if (!((!(field0_in
& 1)) && consume
))
443 if (debug_level
>= 3)
445 LOG_DEBUG("waiting 100ms");
446 alive_sleep(100); /* avoid flooding the logs */
454 if (!(field0_in
& 1))
455 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
460 static int xscale_write_rx(struct target
*target
)
462 struct xscale_common
*xscale
= target_to_xscale(target
);
464 struct timeval timeout
, now
;
465 struct scan_field fields
[3];
466 uint8_t field0_out
= 0x0;
467 uint8_t field0_in
= 0x0;
468 uint8_t field0_check_value
= 0x2;
469 uint8_t field0_check_mask
= 0x6;
470 uint8_t field2
= 0x0;
471 uint8_t field2_check_value
= 0x0;
472 uint8_t field2_check_mask
= 0x1;
474 jtag_set_end_state(TAP_IDLE
);
476 xscale_jtag_set_instr(target
->tap
,
477 XSCALE_DBGRX
<< xscale
->xscale_variant
);
479 memset(&fields
, 0, sizeof fields
);
481 fields
[0].tap
= target
->tap
;
482 fields
[0].num_bits
= 3;
483 fields
[0].out_value
= &field0_out
;
484 fields
[0].in_value
= &field0_in
;
486 fields
[1].tap
= target
->tap
;
487 fields
[1].num_bits
= 32;
488 fields
[1].out_value
= xscale
->reg_cache
->reg_list
[XSCALE_RX
].value
;
490 fields
[2].tap
= target
->tap
;
491 fields
[2].num_bits
= 1;
492 fields
[2].out_value
= &field2
;
494 fields
[2].in_value
= &tmp
;
496 gettimeofday(&timeout
, NULL
);
497 timeval_add_time(&timeout
, 1, 0);
499 /* poll until rx_read is low */
500 LOG_DEBUG("polling RX");
503 jtag_add_dr_scan(3, fields
, jtag_set_end_state(TAP_IDLE
));
505 jtag_check_value_mask(fields
+ 0, &field0_check_value
, &field0_check_mask
);
506 jtag_check_value_mask(fields
+ 2, &field2_check_value
, &field2_check_mask
);
508 if ((retval
= jtag_execute_queue()) != ERROR_OK
)
510 LOG_ERROR("JTAG error while writing RX");
514 gettimeofday(&now
, NULL
);
515 if ((now
.tv_sec
> timeout
.tv_sec
) || ((now
.tv_sec
== timeout
.tv_sec
)&& (now
.tv_usec
> timeout
.tv_usec
)))
517 LOG_ERROR("time out writing RX register");
518 return ERROR_TARGET_TIMEOUT
;
520 if (!(field0_in
& 1))
522 if (debug_level
>= 3)
524 LOG_DEBUG("waiting 100ms");
525 alive_sleep(100); /* avoid flooding the logs */
535 jtag_add_dr_scan(3, fields
, jtag_set_end_state(TAP_IDLE
));
537 if ((retval
= jtag_execute_queue()) != ERROR_OK
)
539 LOG_ERROR("JTAG error while writing RX");
546 /* send count elements of size byte to the debug handler */
547 static int xscale_send(struct target
*target
, uint8_t *buffer
, int count
, int size
)
549 struct xscale_common
*xscale
= target_to_xscale(target
);
555 jtag_set_end_state(TAP_IDLE
);
557 xscale_jtag_set_instr(target
->tap
,
558 XSCALE_DBGRX
<< xscale
->xscale_variant
);
565 int endianness
= target
->endianness
;
566 while (done_count
++ < count
)
571 if (endianness
== TARGET_LITTLE_ENDIAN
)
573 t
[1]=le_to_h_u32(buffer
);
576 t
[1]=be_to_h_u32(buffer
);
580 if (endianness
== TARGET_LITTLE_ENDIAN
)
582 t
[1]=le_to_h_u16(buffer
);
585 t
[1]=be_to_h_u16(buffer
);
592 LOG_ERROR("BUG: size neither 4, 2 nor 1");
593 return ERROR_INVALID_ARGUMENTS
;
595 jtag_add_dr_out(target
->tap
,
599 jtag_set_end_state(TAP_IDLE
));
603 if ((retval
= jtag_execute_queue()) != ERROR_OK
)
605 LOG_ERROR("JTAG error while sending data to debug handler");
612 static int xscale_send_u32(struct target
*target
, uint32_t value
)
614 struct xscale_common
*xscale
= target_to_xscale(target
);
616 buf_set_u32(xscale
->reg_cache
->reg_list
[XSCALE_RX
].value
, 0, 32, value
);
617 return xscale_write_rx(target
);
620 static int xscale_write_dcsr(struct target
*target
, int hold_rst
, int ext_dbg_brk
)
622 struct xscale_common
*xscale
= target_to_xscale(target
);
624 struct scan_field fields
[3];
625 uint8_t field0
= 0x0;
626 uint8_t field0_check_value
= 0x2;
627 uint8_t field0_check_mask
= 0x7;
628 uint8_t field2
= 0x0;
629 uint8_t field2_check_value
= 0x0;
630 uint8_t field2_check_mask
= 0x1;
633 xscale
->hold_rst
= hold_rst
;
635 if (ext_dbg_brk
!= -1)
636 xscale
->external_debug_break
= ext_dbg_brk
;
638 jtag_set_end_state(TAP_IDLE
);
639 xscale_jtag_set_instr(target
->tap
,
640 XSCALE_SELDCSR
<< xscale
->xscale_variant
);
642 buf_set_u32(&field0
, 1, 1, xscale
->hold_rst
);
643 buf_set_u32(&field0
, 2, 1, xscale
->external_debug_break
);
645 memset(&fields
, 0, sizeof fields
);
647 fields
[0].tap
= target
->tap
;
648 fields
[0].num_bits
= 3;
649 fields
[0].out_value
= &field0
;
651 fields
[0].in_value
= &tmp
;
653 fields
[1].tap
= target
->tap
;
654 fields
[1].num_bits
= 32;
655 fields
[1].out_value
= xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].value
;
657 fields
[2].tap
= target
->tap
;
658 fields
[2].num_bits
= 1;
659 fields
[2].out_value
= &field2
;
661 fields
[2].in_value
= &tmp2
;
663 jtag_add_dr_scan(3, fields
, jtag_get_end_state());
665 jtag_check_value_mask(fields
+ 0, &field0_check_value
, &field0_check_mask
);
666 jtag_check_value_mask(fields
+ 2, &field2_check_value
, &field2_check_mask
);
668 if ((retval
= jtag_execute_queue()) != ERROR_OK
)
670 LOG_ERROR("JTAG error while writing DCSR");
674 xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].dirty
= 0;
675 xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].valid
= 1;
680 /* parity of the number of bits 0 if even; 1 if odd. for 32 bit words */
681 static unsigned int parity (unsigned int v
)
683 // unsigned int ov = v;
688 // LOG_DEBUG("parity of 0x%x is %i", ov, (0x6996 >> v) & 1);
689 return (0x6996 >> v
) & 1;
692 static int xscale_load_ic(struct target
*target
, uint32_t va
, uint32_t buffer
[8])
694 struct xscale_common
*xscale
= target_to_xscale(target
);
698 struct scan_field fields
[2];
700 LOG_DEBUG("loading miniIC at 0x%8.8" PRIx32
"", va
);
703 jtag_set_end_state(TAP_IDLE
);
704 xscale_jtag_set_instr(target
->tap
,
705 XSCALE_LDIC
<< xscale
->xscale_variant
);
707 /* CMD is b011 to load a cacheline into the Mini ICache.
708 * Loading into the main ICache is deprecated, and unused.
709 * It's followed by three zero bits, and 27 address bits.
711 buf_set_u32(&cmd
, 0, 6, 0x3);
713 /* virtual address of desired cache line */
714 buf_set_u32(packet
, 0, 27, va
>> 5);
716 memset(&fields
, 0, sizeof fields
);
718 fields
[0].tap
= target
->tap
;
719 fields
[0].num_bits
= 6;
720 fields
[0].out_value
= &cmd
;
722 fields
[1].tap
= target
->tap
;
723 fields
[1].num_bits
= 27;
724 fields
[1].out_value
= packet
;
726 jtag_add_dr_scan(2, fields
, jtag_get_end_state());
728 /* rest of packet is a cacheline: 8 instructions, with parity */
729 fields
[0].num_bits
= 32;
730 fields
[0].out_value
= packet
;
732 fields
[1].num_bits
= 1;
733 fields
[1].out_value
= &cmd
;
735 for (word
= 0; word
< 8; word
++)
737 buf_set_u32(packet
, 0, 32, buffer
[word
]);
740 memcpy(&value
, packet
, sizeof(uint32_t));
743 jtag_add_dr_scan(2, fields
, jtag_get_end_state());
746 return jtag_execute_queue();
749 static int xscale_invalidate_ic_line(struct target
*target
, uint32_t va
)
751 struct xscale_common
*xscale
= target_to_xscale(target
);
754 struct scan_field fields
[2];
756 jtag_set_end_state(TAP_IDLE
);
757 xscale_jtag_set_instr(target
->tap
,
758 XSCALE_LDIC
<< xscale
->xscale_variant
);
760 /* CMD for invalidate IC line b000, bits [6:4] b000 */
761 buf_set_u32(&cmd
, 0, 6, 0x0);
763 /* virtual address of desired cache line */
764 buf_set_u32(packet
, 0, 27, va
>> 5);
766 memset(&fields
, 0, sizeof fields
);
768 fields
[0].tap
= target
->tap
;
769 fields
[0].num_bits
= 6;
770 fields
[0].out_value
= &cmd
;
772 fields
[1].tap
= target
->tap
;
773 fields
[1].num_bits
= 27;
774 fields
[1].out_value
= packet
;
776 jtag_add_dr_scan(2, fields
, jtag_get_end_state());
781 static int xscale_update_vectors(struct target
*target
)
783 struct xscale_common
*xscale
= target_to_xscale(target
);
787 uint32_t low_reset_branch
, high_reset_branch
;
789 for (i
= 1; i
< 8; i
++)
791 /* if there's a static vector specified for this exception, override */
792 if (xscale
->static_high_vectors_set
& (1 << i
))
794 xscale
->high_vectors
[i
] = xscale
->static_high_vectors
[i
];
798 retval
= target_read_u32(target
, 0xffff0000 + 4*i
, &xscale
->high_vectors
[i
]);
799 if (retval
== ERROR_TARGET_TIMEOUT
)
801 if (retval
!= ERROR_OK
)
803 /* Some of these reads will fail as part of normal execution */
804 xscale
->high_vectors
[i
] = ARMV4_5_B(0xfffffe, 0);
809 for (i
= 1; i
< 8; i
++)
811 if (xscale
->static_low_vectors_set
& (1 << i
))
813 xscale
->low_vectors
[i
] = xscale
->static_low_vectors
[i
];
817 retval
= target_read_u32(target
, 0x0 + 4*i
, &xscale
->low_vectors
[i
]);
818 if (retval
== ERROR_TARGET_TIMEOUT
)
820 if (retval
!= ERROR_OK
)
822 /* Some of these reads will fail as part of normal execution */
823 xscale
->low_vectors
[i
] = ARMV4_5_B(0xfffffe, 0);
828 /* calculate branches to debug handler */
829 low_reset_branch
= (xscale
->handler_address
+ 0x20 - 0x0 - 0x8) >> 2;
830 high_reset_branch
= (xscale
->handler_address
+ 0x20 - 0xffff0000 - 0x8) >> 2;
832 xscale
->low_vectors
[0] = ARMV4_5_B((low_reset_branch
& 0xffffff), 0);
833 xscale
->high_vectors
[0] = ARMV4_5_B((high_reset_branch
& 0xffffff), 0);
835 /* invalidate and load exception vectors in mini i-cache */
836 xscale_invalidate_ic_line(target
, 0x0);
837 xscale_invalidate_ic_line(target
, 0xffff0000);
839 xscale_load_ic(target
, 0x0, xscale
->low_vectors
);
840 xscale_load_ic(target
, 0xffff0000, xscale
->high_vectors
);
845 static int xscale_arch_state(struct target
*target
)
847 struct xscale_common
*xscale
= target_to_xscale(target
);
848 struct arm
*armv4_5
= &xscale
->armv4_5_common
;
850 static const char *state
[] =
852 "disabled", "enabled"
855 static const char *arch_dbg_reason
[] =
857 "", "\n(processor reset)", "\n(trace buffer full)"
860 if (armv4_5
->common_magic
!= ARMV4_5_COMMON_MAGIC
)
862 LOG_ERROR("BUG: called for a non-ARMv4/5 target");
863 return ERROR_INVALID_ARGUMENTS
;
866 LOG_USER("target halted in %s state due to %s, current mode: %s\n"
867 "cpsr: 0x%8.8" PRIx32
" pc: 0x%8.8" PRIx32
"\n"
868 "MMU: %s, D-Cache: %s, I-Cache: %s"
870 armv4_5_state_strings
[armv4_5
->core_state
],
871 Jim_Nvp_value2name_simple(nvp_target_debug_reason
, target
->debug_reason
)->name
,
872 arm_mode_name(armv4_5
->core_mode
),
873 buf_get_u32(armv4_5
->cpsr
->value
, 0, 32),
874 buf_get_u32(armv4_5
->core_cache
->reg_list
[15].value
, 0, 32),
875 state
[xscale
->armv4_5_mmu
.mmu_enabled
],
876 state
[xscale
->armv4_5_mmu
.armv4_5_cache
.d_u_cache_enabled
],
877 state
[xscale
->armv4_5_mmu
.armv4_5_cache
.i_cache_enabled
],
878 arch_dbg_reason
[xscale
->arch_debug_reason
]);
883 static int xscale_poll(struct target
*target
)
885 int retval
= ERROR_OK
;
887 if ((target
->state
== TARGET_RUNNING
) || (target
->state
== TARGET_DEBUG_RUNNING
))
889 enum target_state previous_state
= target
->state
;
890 if ((retval
= xscale_read_tx(target
, 0)) == ERROR_OK
)
893 /* there's data to read from the tx register, we entered debug state */
894 target
->state
= TARGET_HALTED
;
896 /* process debug entry, fetching current mode regs */
897 retval
= xscale_debug_entry(target
);
899 else if (retval
!= ERROR_TARGET_RESOURCE_NOT_AVAILABLE
)
901 LOG_USER("error while polling TX register, reset CPU");
902 /* here we "lie" so GDB won't get stuck and a reset can be perfomed */
903 target
->state
= TARGET_HALTED
;
906 /* debug_entry could have overwritten target state (i.e. immediate resume)
907 * don't signal event handlers in that case
909 if (target
->state
!= TARGET_HALTED
)
912 /* if target was running, signal that we halted
913 * otherwise we reentered from debug execution */
914 if (previous_state
== TARGET_RUNNING
)
915 target_call_event_callbacks(target
, TARGET_EVENT_HALTED
);
917 target_call_event_callbacks(target
, TARGET_EVENT_DEBUG_HALTED
);
923 static int xscale_debug_entry(struct target
*target
)
925 struct xscale_common
*xscale
= target_to_xscale(target
);
926 struct arm
*armv4_5
= &xscale
->armv4_5_common
;
933 /* clear external dbg break (will be written on next DCSR read) */
934 xscale
->external_debug_break
= 0;
935 if ((retval
= xscale_read_dcsr(target
)) != ERROR_OK
)
938 /* get r0, pc, r1 to r7 and cpsr */
939 if ((retval
= xscale_receive(target
, buffer
, 10)) != ERROR_OK
)
942 /* move r0 from buffer to register cache */
943 buf_set_u32(armv4_5
->core_cache
->reg_list
[0].value
, 0, 32, buffer
[0]);
944 armv4_5
->core_cache
->reg_list
[0].dirty
= 1;
945 armv4_5
->core_cache
->reg_list
[0].valid
= 1;
946 LOG_DEBUG("r0: 0x%8.8" PRIx32
"", buffer
[0]);
948 /* move pc from buffer to register cache */
949 buf_set_u32(armv4_5
->core_cache
->reg_list
[15].value
, 0, 32, buffer
[1]);
950 armv4_5
->core_cache
->reg_list
[15].dirty
= 1;
951 armv4_5
->core_cache
->reg_list
[15].valid
= 1;
952 LOG_DEBUG("pc: 0x%8.8" PRIx32
"", buffer
[1]);
954 /* move data from buffer to register cache */
955 for (i
= 1; i
<= 7; i
++)
957 buf_set_u32(armv4_5
->core_cache
->reg_list
[i
].value
, 0, 32, buffer
[1 + i
]);
958 armv4_5
->core_cache
->reg_list
[i
].dirty
= 1;
959 armv4_5
->core_cache
->reg_list
[i
].valid
= 1;
960 LOG_DEBUG("r%i: 0x%8.8" PRIx32
"", i
, buffer
[i
+ 1]);
963 arm_set_cpsr(armv4_5
, buffer
[9]);
964 LOG_DEBUG("cpsr: 0x%8.8" PRIx32
"", buffer
[9]);
966 if (!is_arm_mode(armv4_5
->core_mode
))
968 target
->state
= TARGET_UNKNOWN
;
969 LOG_ERROR("cpsr contains invalid mode value - communication failure");
970 return ERROR_TARGET_FAILURE
;
972 LOG_DEBUG("target entered debug state in %s mode",
973 arm_mode_name(armv4_5
->core_mode
));
975 /* get banked registers, r8 to r14, and spsr if not in USR/SYS mode */
976 if ((armv4_5
->core_mode
!= ARMV4_5_MODE_USR
) && (armv4_5
->core_mode
!= ARMV4_5_MODE_SYS
))
978 xscale_receive(target
, buffer
, 8);
979 buf_set_u32(ARMV4_5_CORE_REG_MODE(armv4_5
->core_cache
, armv4_5
->core_mode
, 16).value
, 0, 32, buffer
[7]);
980 ARMV4_5_CORE_REG_MODE(armv4_5
->core_cache
, armv4_5
->core_mode
, 16).dirty
= 0;
981 ARMV4_5_CORE_REG_MODE(armv4_5
->core_cache
, armv4_5
->core_mode
, 16).valid
= 1;
985 /* r8 to r14, but no spsr */
986 xscale_receive(target
, buffer
, 7);
989 /* move data from buffer to register cache */
990 for (i
= 8; i
<= 14; i
++)
992 buf_set_u32(ARMV4_5_CORE_REG_MODE(armv4_5
->core_cache
, armv4_5
->core_mode
, i
).value
, 0, 32, buffer
[i
- 8]);
993 ARMV4_5_CORE_REG_MODE(armv4_5
->core_cache
, armv4_5
->core_mode
, i
).dirty
= 0;
994 ARMV4_5_CORE_REG_MODE(armv4_5
->core_cache
, armv4_5
->core_mode
, i
).valid
= 1;
997 /* examine debug reason */
998 xscale_read_dcsr(target
);
999 moe
= buf_get_u32(xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].value
, 2, 3);
1001 /* stored PC (for calculating fixup) */
1002 pc
= buf_get_u32(armv4_5
->core_cache
->reg_list
[15].value
, 0, 32);
1006 case 0x0: /* Processor reset */
1007 target
->debug_reason
= DBG_REASON_DBGRQ
;
1008 xscale
->arch_debug_reason
= XSCALE_DBG_REASON_RESET
;
1011 case 0x1: /* Instruction breakpoint hit */
1012 target
->debug_reason
= DBG_REASON_BREAKPOINT
;
1013 xscale
->arch_debug_reason
= XSCALE_DBG_REASON_GENERIC
;
1016 case 0x2: /* Data breakpoint hit */
1017 target
->debug_reason
= DBG_REASON_WATCHPOINT
;
1018 xscale
->arch_debug_reason
= XSCALE_DBG_REASON_GENERIC
;
1021 case 0x3: /* BKPT instruction executed */
1022 target
->debug_reason
= DBG_REASON_BREAKPOINT
;
1023 xscale
->arch_debug_reason
= XSCALE_DBG_REASON_GENERIC
;
1026 case 0x4: /* Ext. debug event */
1027 target
->debug_reason
= DBG_REASON_DBGRQ
;
1028 xscale
->arch_debug_reason
= XSCALE_DBG_REASON_GENERIC
;
1031 case 0x5: /* Vector trap occured */
1032 target
->debug_reason
= DBG_REASON_BREAKPOINT
;
1033 xscale
->arch_debug_reason
= XSCALE_DBG_REASON_GENERIC
;
1036 case 0x6: /* Trace buffer full break */
1037 target
->debug_reason
= DBG_REASON_DBGRQ
;
1038 xscale
->arch_debug_reason
= XSCALE_DBG_REASON_TB_FULL
;
1041 case 0x7: /* Reserved (may flag Hot-Debug support) */
1043 LOG_ERROR("Method of Entry is 'Reserved'");
1048 /* apply PC fixup */
1049 buf_set_u32(armv4_5
->core_cache
->reg_list
[15].value
, 0, 32, pc
);
1051 /* on the first debug entry, identify cache type */
1052 if (xscale
->armv4_5_mmu
.armv4_5_cache
.ctype
== -1)
1054 uint32_t cache_type_reg
;
1056 /* read cp15 cache type register */
1057 xscale_get_reg(&xscale
->reg_cache
->reg_list
[XSCALE_CACHETYPE
]);
1058 cache_type_reg
= buf_get_u32(xscale
->reg_cache
->reg_list
[XSCALE_CACHETYPE
].value
, 0, 32);
1060 armv4_5_identify_cache(cache_type_reg
, &xscale
->armv4_5_mmu
.armv4_5_cache
);
1063 /* examine MMU and Cache settings */
1064 /* read cp15 control register */
1065 xscale_get_reg(&xscale
->reg_cache
->reg_list
[XSCALE_CTRL
]);
1066 xscale
->cp15_control_reg
= buf_get_u32(xscale
->reg_cache
->reg_list
[XSCALE_CTRL
].value
, 0, 32);
1067 xscale
->armv4_5_mmu
.mmu_enabled
= (xscale
->cp15_control_reg
& 0x1U
) ? 1 : 0;
1068 xscale
->armv4_5_mmu
.armv4_5_cache
.d_u_cache_enabled
= (xscale
->cp15_control_reg
& 0x4U
) ? 1 : 0;
1069 xscale
->armv4_5_mmu
.armv4_5_cache
.i_cache_enabled
= (xscale
->cp15_control_reg
& 0x1000U
) ? 1 : 0;
1071 /* tracing enabled, read collected trace data */
1072 if (xscale
->trace
.buffer_enabled
)
1074 xscale_read_trace(target
);
1075 xscale
->trace
.buffer_fill
--;
1077 /* resume if we're still collecting trace data */
1078 if ((xscale
->arch_debug_reason
== XSCALE_DBG_REASON_TB_FULL
)
1079 && (xscale
->trace
.buffer_fill
> 0))
1081 xscale_resume(target
, 1, 0x0, 1, 0);
1085 xscale
->trace
.buffer_enabled
= 0;
1092 static int xscale_halt(struct target
*target
)
1094 struct xscale_common
*xscale
= target_to_xscale(target
);
1096 LOG_DEBUG("target->state: %s",
1097 target_state_name(target
));
1099 if (target
->state
== TARGET_HALTED
)
1101 LOG_DEBUG("target was already halted");
1104 else if (target
->state
== TARGET_UNKNOWN
)
1106 /* this must not happen for a xscale target */
1107 LOG_ERROR("target was in unknown state when halt was requested");
1108 return ERROR_TARGET_INVALID
;
1110 else if (target
->state
== TARGET_RESET
)
1112 LOG_DEBUG("target->state == TARGET_RESET");
1116 /* assert external dbg break */
1117 xscale
->external_debug_break
= 1;
1118 xscale_read_dcsr(target
);
1120 target
->debug_reason
= DBG_REASON_DBGRQ
;
1126 static int xscale_enable_single_step(struct target
*target
, uint32_t next_pc
)
1128 struct xscale_common
*xscale
= target_to_xscale(target
);
1129 struct reg
*ibcr0
= &xscale
->reg_cache
->reg_list
[XSCALE_IBCR0
];
1132 if (xscale
->ibcr0_used
)
1134 struct breakpoint
*ibcr0_bp
= breakpoint_find(target
, buf_get_u32(ibcr0
->value
, 0, 32) & 0xfffffffe);
1138 xscale_unset_breakpoint(target
, ibcr0_bp
);
1142 LOG_ERROR("BUG: xscale->ibcr0_used is set, but no breakpoint with that address found");
1147 if ((retval
= xscale_set_reg_u32(ibcr0
, next_pc
| 0x1)) != ERROR_OK
)
1153 static int xscale_disable_single_step(struct target
*target
)
1155 struct xscale_common
*xscale
= target_to_xscale(target
);
1156 struct reg
*ibcr0
= &xscale
->reg_cache
->reg_list
[XSCALE_IBCR0
];
1159 if ((retval
= xscale_set_reg_u32(ibcr0
, 0x0)) != ERROR_OK
)
1165 static void xscale_enable_watchpoints(struct target
*target
)
1167 struct watchpoint
*watchpoint
= target
->watchpoints
;
1171 if (watchpoint
->set
== 0)
1172 xscale_set_watchpoint(target
, watchpoint
);
1173 watchpoint
= watchpoint
->next
;
1177 static void xscale_enable_breakpoints(struct target
*target
)
1179 struct breakpoint
*breakpoint
= target
->breakpoints
;
1181 /* set any pending breakpoints */
1184 if (breakpoint
->set
== 0)
1185 xscale_set_breakpoint(target
, breakpoint
);
1186 breakpoint
= breakpoint
->next
;
1190 static int xscale_resume(struct target
*target
, int current
,
1191 uint32_t address
, int handle_breakpoints
, int debug_execution
)
1193 struct xscale_common
*xscale
= target_to_xscale(target
);
1194 struct arm
*armv4_5
= &xscale
->armv4_5_common
;
1195 struct breakpoint
*breakpoint
= target
->breakpoints
;
1196 uint32_t current_pc
;
1202 if (target
->state
!= TARGET_HALTED
)
1204 LOG_WARNING("target not halted");
1205 return ERROR_TARGET_NOT_HALTED
;
1208 if (!debug_execution
)
1210 target_free_all_working_areas(target
);
1213 /* update vector tables */
1214 if ((retval
= xscale_update_vectors(target
)) != ERROR_OK
)
1217 /* current = 1: continue on current pc, otherwise continue at <address> */
1219 buf_set_u32(armv4_5
->core_cache
->reg_list
[15].value
, 0, 32, address
);
1221 current_pc
= buf_get_u32(armv4_5
->core_cache
->reg_list
[15].value
, 0, 32);
1223 /* if we're at the reset vector, we have to simulate the branch */
1224 if (current_pc
== 0x0)
1226 arm_simulate_step(target
, NULL
);
1227 current_pc
= buf_get_u32(armv4_5
->core_cache
->reg_list
[15].value
, 0, 32);
1230 /* the front-end may request us not to handle breakpoints */
1231 if (handle_breakpoints
)
1233 if ((breakpoint
= breakpoint_find(target
, buf_get_u32(armv4_5
->core_cache
->reg_list
[15].value
, 0, 32))))
1237 /* there's a breakpoint at the current PC, we have to step over it */
1238 LOG_DEBUG("unset breakpoint at 0x%8.8" PRIx32
"", breakpoint
->address
);
1239 xscale_unset_breakpoint(target
, breakpoint
);
1241 /* calculate PC of next instruction */
1242 if ((retval
= arm_simulate_step(target
, &next_pc
)) != ERROR_OK
)
1244 uint32_t current_opcode
;
1245 target_read_u32(target
, current_pc
, ¤t_opcode
);
1246 LOG_ERROR("BUG: couldn't calculate PC of next instruction, current opcode was 0x%8.8" PRIx32
"", current_opcode
);
1249 LOG_DEBUG("enable single-step");
1250 xscale_enable_single_step(target
, next_pc
);
1252 /* restore banked registers */
1253 xscale_restore_context(target
);
1255 /* send resume request (command 0x30 or 0x31)
1256 * clean the trace buffer if it is to be enabled (0x62) */
1257 if (xscale
->trace
.buffer_enabled
)
1259 xscale_send_u32(target
, 0x62);
1260 xscale_send_u32(target
, 0x31);
1263 xscale_send_u32(target
, 0x30);
1266 xscale_send_u32(target
,
1267 buf_get_u32(armv4_5
->cpsr
->value
, 0, 32));
1268 LOG_DEBUG("writing cpsr with value 0x%8.8" PRIx32
,
1269 buf_get_u32(armv4_5
->cpsr
->value
, 0, 32));
1271 for (i
= 7; i
>= 0; i
--)
1274 xscale_send_u32(target
, buf_get_u32(armv4_5
->core_cache
->reg_list
[i
].value
, 0, 32));
1275 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));
1279 xscale_send_u32(target
, buf_get_u32(armv4_5
->core_cache
->reg_list
[15].value
, 0, 32));
1280 LOG_DEBUG("writing PC with value 0x%8.8" PRIx32
"", buf_get_u32(armv4_5
->core_cache
->reg_list
[15].value
, 0, 32));
1282 /* wait for and process debug entry */
1283 xscale_debug_entry(target
);
1285 LOG_DEBUG("disable single-step");
1286 xscale_disable_single_step(target
);
1288 LOG_DEBUG("set breakpoint at 0x%8.8" PRIx32
"", breakpoint
->address
);
1289 xscale_set_breakpoint(target
, breakpoint
);
1293 /* enable any pending breakpoints and watchpoints */
1294 xscale_enable_breakpoints(target
);
1295 xscale_enable_watchpoints(target
);
1297 /* restore banked registers */
1298 xscale_restore_context(target
);
1300 /* send resume request (command 0x30 or 0x31)
1301 * clean the trace buffer if it is to be enabled (0x62) */
1302 if (xscale
->trace
.buffer_enabled
)
1304 xscale_send_u32(target
, 0x62);
1305 xscale_send_u32(target
, 0x31);
1308 xscale_send_u32(target
, 0x30);
1311 xscale_send_u32(target
, buf_get_u32(armv4_5
->cpsr
->value
, 0, 32));
1312 LOG_DEBUG("writing cpsr with value 0x%8.8" PRIx32
,
1313 buf_get_u32(armv4_5
->cpsr
->value
, 0, 32));
1315 for (i
= 7; i
>= 0; i
--)
1318 xscale_send_u32(target
, buf_get_u32(armv4_5
->core_cache
->reg_list
[i
].value
, 0, 32));
1319 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));
1323 xscale_send_u32(target
, buf_get_u32(armv4_5
->core_cache
->reg_list
[15].value
, 0, 32));
1324 LOG_DEBUG("writing PC with value 0x%8.8" PRIx32
"", buf_get_u32(armv4_5
->core_cache
->reg_list
[15].value
, 0, 32));
1326 target
->debug_reason
= DBG_REASON_NOTHALTED
;
1328 if (!debug_execution
)
1330 /* registers are now invalid */
1331 register_cache_invalidate(armv4_5
->core_cache
);
1332 target
->state
= TARGET_RUNNING
;
1333 target_call_event_callbacks(target
, TARGET_EVENT_RESUMED
);
1337 target
->state
= TARGET_DEBUG_RUNNING
;
1338 target_call_event_callbacks(target
, TARGET_EVENT_DEBUG_RESUMED
);
1341 LOG_DEBUG("target resumed");
1346 static int xscale_step_inner(struct target
*target
, int current
,
1347 uint32_t address
, int handle_breakpoints
)
1349 struct xscale_common
*xscale
= target_to_xscale(target
);
1350 struct arm
*armv4_5
= &xscale
->armv4_5_common
;
1355 target
->debug_reason
= DBG_REASON_SINGLESTEP
;
1357 /* calculate PC of next instruction */
1358 if ((retval
= arm_simulate_step(target
, &next_pc
)) != ERROR_OK
)
1360 uint32_t current_opcode
, current_pc
;
1361 current_pc
= buf_get_u32(armv4_5
->core_cache
->reg_list
[15].value
, 0, 32);
1363 target_read_u32(target
, current_pc
, ¤t_opcode
);
1364 LOG_ERROR("BUG: couldn't calculate PC of next instruction, current opcode was 0x%8.8" PRIx32
"", current_opcode
);
1368 LOG_DEBUG("enable single-step");
1369 if ((retval
= xscale_enable_single_step(target
, next_pc
)) != ERROR_OK
)
1372 /* restore banked registers */
1373 if ((retval
= xscale_restore_context(target
)) != ERROR_OK
)
1376 /* send resume request (command 0x30 or 0x31)
1377 * clean the trace buffer if it is to be enabled (0x62) */
1378 if (xscale
->trace
.buffer_enabled
)
1380 if ((retval
= xscale_send_u32(target
, 0x62)) != ERROR_OK
)
1382 if ((retval
= xscale_send_u32(target
, 0x31)) != ERROR_OK
)
1386 if ((retval
= xscale_send_u32(target
, 0x30)) != ERROR_OK
)
1390 retval
= xscale_send_u32(target
,
1391 buf_get_u32(armv4_5
->cpsr
->value
, 0, 32));
1392 if (retval
!= ERROR_OK
)
1394 LOG_DEBUG("writing cpsr with value 0x%8.8" PRIx32
,
1395 buf_get_u32(armv4_5
->cpsr
->value
, 0, 32));
1397 for (i
= 7; i
>= 0; i
--)
1400 if ((retval
= xscale_send_u32(target
, buf_get_u32(armv4_5
->core_cache
->reg_list
[i
].value
, 0, 32))) != ERROR_OK
)
1402 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));
1406 if ((retval
= xscale_send_u32(target
, buf_get_u32(armv4_5
->core_cache
->reg_list
[15].value
, 0, 32))) != ERROR_OK
)
1408 LOG_DEBUG("writing PC with value 0x%8.8" PRIx32
, buf_get_u32(armv4_5
->core_cache
->reg_list
[15].value
, 0, 32));
1410 target_call_event_callbacks(target
, TARGET_EVENT_RESUMED
);
1412 /* registers are now invalid */
1413 register_cache_invalidate(armv4_5
->core_cache
);
1415 /* wait for and process debug entry */
1416 if ((retval
= xscale_debug_entry(target
)) != ERROR_OK
)
1419 LOG_DEBUG("disable single-step");
1420 if ((retval
= xscale_disable_single_step(target
)) != ERROR_OK
)
1423 target_call_event_callbacks(target
, TARGET_EVENT_HALTED
);
1428 static int xscale_step(struct target
*target
, int current
,
1429 uint32_t address
, int handle_breakpoints
)
1431 struct arm
*armv4_5
= target_to_armv4_5(target
);
1432 struct breakpoint
*breakpoint
= target
->breakpoints
;
1434 uint32_t current_pc
;
1437 if (target
->state
!= TARGET_HALTED
)
1439 LOG_WARNING("target not halted");
1440 return ERROR_TARGET_NOT_HALTED
;
1443 /* current = 1: continue on current pc, otherwise continue at <address> */
1445 buf_set_u32(armv4_5
->core_cache
->reg_list
[15].value
, 0, 32, address
);
1447 current_pc
= buf_get_u32(armv4_5
->core_cache
->reg_list
[15].value
, 0, 32);
1449 /* if we're at the reset vector, we have to simulate the step */
1450 if (current_pc
== 0x0)
1452 if ((retval
= arm_simulate_step(target
, NULL
)) != ERROR_OK
)
1454 current_pc
= buf_get_u32(armv4_5
->core_cache
->reg_list
[15].value
, 0, 32);
1456 target
->debug_reason
= DBG_REASON_SINGLESTEP
;
1457 target_call_event_callbacks(target
, TARGET_EVENT_HALTED
);
1462 /* the front-end may request us not to handle breakpoints */
1463 if (handle_breakpoints
)
1464 if ((breakpoint
= breakpoint_find(target
, buf_get_u32(armv4_5
->core_cache
->reg_list
[15].value
, 0, 32))))
1466 if ((retval
= xscale_unset_breakpoint(target
, breakpoint
)) != ERROR_OK
)
1470 retval
= xscale_step_inner(target
, current
, address
, handle_breakpoints
);
1474 xscale_set_breakpoint(target
, breakpoint
);
1477 LOG_DEBUG("target stepped");
1483 static int xscale_assert_reset(struct target
*target
)
1485 struct xscale_common
*xscale
= target_to_xscale(target
);
1487 LOG_DEBUG("target->state: %s",
1488 target_state_name(target
));
1490 /* select DCSR instruction (set endstate to R-T-I to ensure we don't
1491 * end up in T-L-R, which would reset JTAG
1493 jtag_set_end_state(TAP_IDLE
);
1494 xscale_jtag_set_instr(target
->tap
,
1495 XSCALE_SELDCSR
<< xscale
->xscale_variant
);
1497 /* set Hold reset, Halt mode and Trap Reset */
1498 buf_set_u32(xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].value
, 30, 1, 0x1);
1499 buf_set_u32(xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].value
, 16, 1, 0x1);
1500 xscale_write_dcsr(target
, 1, 0);
1502 /* select BYPASS, because having DCSR selected caused problems on the PXA27x */
1503 xscale_jtag_set_instr(target
->tap
, 0x7f);
1504 jtag_execute_queue();
1507 jtag_add_reset(0, 1);
1509 /* sleep 1ms, to be sure we fulfill any requirements */
1510 jtag_add_sleep(1000);
1511 jtag_execute_queue();
1513 target
->state
= TARGET_RESET
;
1515 if (target
->reset_halt
)
1518 if ((retval
= target_halt(target
)) != ERROR_OK
)
1525 static int xscale_deassert_reset(struct target
*target
)
1527 struct xscale_common
*xscale
= target_to_xscale(target
);
1528 struct breakpoint
*breakpoint
= target
->breakpoints
;
1532 xscale
->ibcr_available
= 2;
1533 xscale
->ibcr0_used
= 0;
1534 xscale
->ibcr1_used
= 0;
1536 xscale
->dbr_available
= 2;
1537 xscale
->dbr0_used
= 0;
1538 xscale
->dbr1_used
= 0;
1540 /* mark all hardware breakpoints as unset */
1543 if (breakpoint
->type
== BKPT_HARD
)
1545 breakpoint
->set
= 0;
1547 breakpoint
= breakpoint
->next
;
1550 register_cache_invalidate(xscale
->armv4_5_common
.core_cache
);
1552 /* FIXME mark hardware watchpoints got unset too. Also,
1553 * at least some of the XScale registers are invalid...
1557 * REVISIT: *assumes* we had a SRST+TRST reset so the mini-icache
1558 * contents got invalidated. Safer to force that, so writing new
1559 * contents can't ever fail..
1564 const uint8_t *buffer
= xscale_debug_handler
;
1568 jtag_add_reset(0, 0);
1570 /* wait 300ms; 150 and 100ms were not enough */
1571 jtag_add_sleep(300*1000);
1573 jtag_add_runtest(2030, jtag_set_end_state(TAP_IDLE
));
1574 jtag_execute_queue();
1576 /* set Hold reset, Halt mode and Trap Reset */
1577 buf_set_u32(xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].value
, 30, 1, 0x1);
1578 buf_set_u32(xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].value
, 16, 1, 0x1);
1579 xscale_write_dcsr(target
, 1, 0);
1581 /* Load the debug handler into the mini-icache. Since
1582 * it's using halt mode (not monitor mode), it runs in
1583 * "Special Debug State" for access to registers, memory,
1584 * coprocessors, trace data, etc.
1586 address
= xscale
->handler_address
;
1587 for (unsigned binary_size
= sizeof xscale_debug_handler
- 1;
1589 binary_size
-= buf_cnt
, buffer
+= buf_cnt
)
1591 uint32_t cache_line
[8];
1594 buf_cnt
= binary_size
;
1598 for (i
= 0; i
< buf_cnt
; i
+= 4)
1600 /* convert LE buffer to host-endian uint32_t */
1601 cache_line
[i
/ 4] = le_to_h_u32(&buffer
[i
]);
1604 for (; i
< 32; i
+= 4)
1606 cache_line
[i
/ 4] = 0xe1a08008;
1609 /* only load addresses other than the reset vectors */
1610 if ((address
% 0x400) != 0x0)
1612 retval
= xscale_load_ic(target
, address
,
1614 if (retval
!= ERROR_OK
)
1621 retval
= xscale_load_ic(target
, 0x0,
1622 xscale
->low_vectors
);
1623 if (retval
!= ERROR_OK
)
1625 retval
= xscale_load_ic(target
, 0xffff0000,
1626 xscale
->high_vectors
);
1627 if (retval
!= ERROR_OK
)
1630 jtag_add_runtest(30, jtag_set_end_state(TAP_IDLE
));
1632 jtag_add_sleep(100000);
1634 /* set Hold reset, Halt mode and Trap Reset */
1635 buf_set_u32(xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].value
, 30, 1, 0x1);
1636 buf_set_u32(xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].value
, 16, 1, 0x1);
1637 xscale_write_dcsr(target
, 1, 0);
1639 /* clear Hold reset to let the target run (should enter debug handler) */
1640 xscale_write_dcsr(target
, 0, 1);
1641 target
->state
= TARGET_RUNNING
;
1643 if (!target
->reset_halt
)
1645 jtag_add_sleep(10000);
1647 /* we should have entered debug now */
1648 xscale_debug_entry(target
);
1649 target
->state
= TARGET_HALTED
;
1651 /* resume the target */
1652 xscale_resume(target
, 1, 0x0, 1, 0);
1659 static int xscale_read_core_reg(struct target
*target
, struct reg
*r
,
1660 int num
, enum armv4_5_mode mode
)
1662 /** \todo add debug handler support for core register reads */
1663 LOG_ERROR("not implemented");
1667 static int xscale_write_core_reg(struct target
*target
, struct reg
*r
,
1668 int num
, enum armv4_5_mode mode
, uint32_t value
)
1670 /** \todo add debug handler support for core register writes */
1671 LOG_ERROR("not implemented");
1675 static int xscale_full_context(struct target
*target
)
1677 struct arm
*armv4_5
= target_to_armv4_5(target
);
1685 if (target
->state
!= TARGET_HALTED
)
1687 LOG_WARNING("target not halted");
1688 return ERROR_TARGET_NOT_HALTED
;
1691 buffer
= malloc(4 * 8);
1693 /* iterate through processor modes (FIQ, IRQ, SVC, ABT, UND and SYS)
1694 * we can't enter User mode on an XScale (unpredictable),
1695 * but User shares registers with SYS
1697 for (i
= 1; i
< 7; i
++)
1701 /* check if there are invalid registers in the current mode
1703 for (j
= 0; j
<= 16; j
++)
1705 if (ARMV4_5_CORE_REG_MODE(armv4_5
->core_cache
, armv4_5_number_to_mode(i
), j
).valid
== 0)
1713 /* request banked registers */
1714 xscale_send_u32(target
, 0x0);
1717 tmp_cpsr
|= armv4_5_number_to_mode(i
);
1718 tmp_cpsr
|= 0xc0; /* I/F bits */
1720 /* send CPSR for desired mode */
1721 xscale_send_u32(target
, tmp_cpsr
);
1723 /* get banked registers, r8 to r14, and spsr if not in USR/SYS mode */
1724 if ((armv4_5_number_to_mode(i
) != ARMV4_5_MODE_USR
) && (armv4_5_number_to_mode(i
) != ARMV4_5_MODE_SYS
))
1726 xscale_receive(target
, buffer
, 8);
1727 buf_set_u32(ARMV4_5_CORE_REG_MODE(armv4_5
->core_cache
, armv4_5
->core_mode
, 16).value
, 0, 32, buffer
[7]);
1728 ARMV4_5_CORE_REG_MODE(armv4_5
->core_cache
, armv4_5_number_to_mode(i
), 16).dirty
= 0;
1729 ARMV4_5_CORE_REG_MODE(armv4_5
->core_cache
, armv4_5_number_to_mode(i
), 16).valid
= 1;
1733 xscale_receive(target
, buffer
, 7);
1736 /* move data from buffer to register cache */
1737 for (j
= 8; j
<= 14; j
++)
1739 buf_set_u32(ARMV4_5_CORE_REG_MODE(armv4_5
->core_cache
, armv4_5_number_to_mode(i
), j
).value
, 0, 32, buffer
[j
- 8]);
1740 ARMV4_5_CORE_REG_MODE(armv4_5
->core_cache
, armv4_5_number_to_mode(i
), j
).dirty
= 0;
1741 ARMV4_5_CORE_REG_MODE(armv4_5
->core_cache
, armv4_5_number_to_mode(i
), j
).valid
= 1;
1751 static int xscale_restore_context(struct target
*target
)
1753 struct arm
*armv4_5
= target_to_armv4_5(target
);
1757 if (target
->state
!= TARGET_HALTED
)
1759 LOG_WARNING("target not halted");
1760 return ERROR_TARGET_NOT_HALTED
;
1763 /* iterate through processor modes (FIQ, IRQ, SVC, ABT, UND and SYS)
1764 * we can't enter User mode on an XScale (unpredictable),
1765 * but User shares registers with SYS
1767 for (i
= 1; i
< 7; i
++)
1771 /* check if there are invalid registers in the current mode
1773 for (j
= 8; j
<= 14; j
++)
1775 if (ARMV4_5_CORE_REG_MODE(armv4_5
->core_cache
, armv4_5_number_to_mode(i
), j
).dirty
== 1)
1779 /* if not USR/SYS, check if the SPSR needs to be written */
1780 if ((armv4_5_number_to_mode(i
) != ARMV4_5_MODE_USR
) && (armv4_5_number_to_mode(i
) != ARMV4_5_MODE_SYS
))
1782 if (ARMV4_5_CORE_REG_MODE(armv4_5
->core_cache
, armv4_5_number_to_mode(i
), 16).dirty
== 1)
1790 /* send banked registers */
1791 xscale_send_u32(target
, 0x1);
1794 tmp_cpsr
|= armv4_5_number_to_mode(i
);
1795 tmp_cpsr
|= 0xc0; /* I/F bits */
1797 /* send CPSR for desired mode */
1798 xscale_send_u32(target
, tmp_cpsr
);
1800 /* send banked registers, r8 to r14, and spsr if not in USR/SYS mode */
1801 for (j
= 8; j
<= 14; j
++)
1803 xscale_send_u32(target
, buf_get_u32(ARMV4_5_CORE_REG_MODE(armv4_5
->core_cache
, armv4_5
->core_mode
, j
).value
, 0, 32));
1804 ARMV4_5_CORE_REG_MODE(armv4_5
->core_cache
, armv4_5_number_to_mode(i
), j
).dirty
= 0;
1807 if ((armv4_5_number_to_mode(i
) != ARMV4_5_MODE_USR
) && (armv4_5_number_to_mode(i
) != ARMV4_5_MODE_SYS
))
1809 xscale_send_u32(target
, buf_get_u32(ARMV4_5_CORE_REG_MODE(armv4_5
->core_cache
, armv4_5
->core_mode
, 16).value
, 0, 32));
1810 ARMV4_5_CORE_REG_MODE(armv4_5
->core_cache
, armv4_5_number_to_mode(i
), 16).dirty
= 0;
1818 static int xscale_read_memory(struct target
*target
, uint32_t address
,
1819 uint32_t size
, uint32_t count
, uint8_t *buffer
)
1821 struct xscale_common
*xscale
= target_to_xscale(target
);
1826 LOG_DEBUG("address: 0x%8.8" PRIx32
", size: 0x%8.8" PRIx32
", count: 0x%8.8" PRIx32
, address
, size
, count
);
1828 if (target
->state
!= TARGET_HALTED
)
1830 LOG_WARNING("target not halted");
1831 return ERROR_TARGET_NOT_HALTED
;
1834 /* sanitize arguments */
1835 if (((size
!= 4) && (size
!= 2) && (size
!= 1)) || (count
== 0) || !(buffer
))
1836 return ERROR_INVALID_ARGUMENTS
;
1838 if (((size
== 4) && (address
& 0x3u
)) || ((size
== 2) && (address
& 0x1u
)))
1839 return ERROR_TARGET_UNALIGNED_ACCESS
;
1841 /* send memory read request (command 0x1n, n: access size) */
1842 if ((retval
= xscale_send_u32(target
, 0x10 | size
)) != ERROR_OK
)
1845 /* send base address for read request */
1846 if ((retval
= xscale_send_u32(target
, address
)) != ERROR_OK
)
1849 /* send number of requested data words */
1850 if ((retval
= xscale_send_u32(target
, count
)) != ERROR_OK
)
1853 /* receive data from target (count times 32-bit words in host endianness) */
1854 buf32
= malloc(4 * count
);
1855 if ((retval
= xscale_receive(target
, buf32
, count
)) != ERROR_OK
)
1858 /* extract data from host-endian buffer into byte stream */
1859 for (i
= 0; i
< count
; i
++)
1864 target_buffer_set_u32(target
, buffer
, buf32
[i
]);
1868 target_buffer_set_u16(target
, buffer
, buf32
[i
] & 0xffff);
1872 *buffer
++ = buf32
[i
] & 0xff;
1875 LOG_ERROR("invalid read size");
1876 return ERROR_INVALID_ARGUMENTS
;
1882 /* examine DCSR, to see if Sticky Abort (SA) got set */
1883 if ((retval
= xscale_read_dcsr(target
)) != ERROR_OK
)
1885 if (buf_get_u32(xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].value
, 5, 1) == 1)
1888 if ((retval
= xscale_send_u32(target
, 0x60)) != ERROR_OK
)
1891 return ERROR_TARGET_DATA_ABORT
;
1897 static int xscale_read_phys_memory(struct target
*target
, uint32_t address
,
1898 uint32_t size
, uint32_t count
, uint8_t *buffer
)
1900 /** \todo: provide a non-stub implementtion of this routine. */
1901 LOG_ERROR("%s: %s is not implemented. Disable MMU?",
1902 target_name(target
), __func__
);
1906 static int xscale_write_memory(struct target
*target
, uint32_t address
,
1907 uint32_t size
, uint32_t count
, uint8_t *buffer
)
1909 struct xscale_common
*xscale
= target_to_xscale(target
);
1912 LOG_DEBUG("address: 0x%8.8" PRIx32
", size: 0x%8.8" PRIx32
", count: 0x%8.8" PRIx32
, address
, size
, count
);
1914 if (target
->state
!= TARGET_HALTED
)
1916 LOG_WARNING("target not halted");
1917 return ERROR_TARGET_NOT_HALTED
;
1920 /* sanitize arguments */
1921 if (((size
!= 4) && (size
!= 2) && (size
!= 1)) || (count
== 0) || !(buffer
))
1922 return ERROR_INVALID_ARGUMENTS
;
1924 if (((size
== 4) && (address
& 0x3u
)) || ((size
== 2) && (address
& 0x1u
)))
1925 return ERROR_TARGET_UNALIGNED_ACCESS
;
1927 /* send memory write request (command 0x2n, n: access size) */
1928 if ((retval
= xscale_send_u32(target
, 0x20 | size
)) != ERROR_OK
)
1931 /* send base address for read request */
1932 if ((retval
= xscale_send_u32(target
, address
)) != ERROR_OK
)
1935 /* send number of requested data words to be written*/
1936 if ((retval
= xscale_send_u32(target
, count
)) != ERROR_OK
)
1939 /* extract data from host-endian buffer into byte stream */
1941 for (i
= 0; i
< count
; i
++)
1946 value
= target_buffer_get_u32(target
, buffer
);
1947 xscale_send_u32(target
, value
);
1951 value
= target_buffer_get_u16(target
, buffer
);
1952 xscale_send_u32(target
, value
);
1957 xscale_send_u32(target
, value
);
1961 LOG_ERROR("should never get here");
1966 if ((retval
= xscale_send(target
, buffer
, count
, size
)) != ERROR_OK
)
1969 /* examine DCSR, to see if Sticky Abort (SA) got set */
1970 if ((retval
= xscale_read_dcsr(target
)) != ERROR_OK
)
1972 if (buf_get_u32(xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].value
, 5, 1) == 1)
1975 if ((retval
= xscale_send_u32(target
, 0x60)) != ERROR_OK
)
1978 return ERROR_TARGET_DATA_ABORT
;
1984 static int xscale_write_phys_memory(struct target
*target
, uint32_t address
,
1985 uint32_t size
, uint32_t count
, uint8_t *buffer
)
1987 /** \todo: provide a non-stub implementtion of this routine. */
1988 LOG_ERROR("%s: %s is not implemented. Disable MMU?",
1989 target_name(target
), __func__
);
1993 static int xscale_bulk_write_memory(struct target
*target
, uint32_t address
,
1994 uint32_t count
, uint8_t *buffer
)
1996 return xscale_write_memory(target
, address
, 4, count
, buffer
);
1999 static uint32_t xscale_get_ttb(struct target
*target
)
2001 struct xscale_common
*xscale
= target_to_xscale(target
);
2004 xscale_get_reg(&xscale
->reg_cache
->reg_list
[XSCALE_TTB
]);
2005 ttb
= buf_get_u32(xscale
->reg_cache
->reg_list
[XSCALE_TTB
].value
, 0, 32);
2010 static void xscale_disable_mmu_caches(struct target
*target
, int mmu
,
2011 int d_u_cache
, int i_cache
)
2013 struct xscale_common
*xscale
= target_to_xscale(target
);
2014 uint32_t cp15_control
;
2016 /* read cp15 control register */
2017 xscale_get_reg(&xscale
->reg_cache
->reg_list
[XSCALE_CTRL
]);
2018 cp15_control
= buf_get_u32(xscale
->reg_cache
->reg_list
[XSCALE_CTRL
].value
, 0, 32);
2021 cp15_control
&= ~0x1U
;
2026 xscale_send_u32(target
, 0x50);
2027 xscale_send_u32(target
, xscale
->cache_clean_address
);
2029 /* invalidate DCache */
2030 xscale_send_u32(target
, 0x51);
2032 cp15_control
&= ~0x4U
;
2037 /* invalidate ICache */
2038 xscale_send_u32(target
, 0x52);
2039 cp15_control
&= ~0x1000U
;
2042 /* write new cp15 control register */
2043 xscale_set_reg_u32(&xscale
->reg_cache
->reg_list
[XSCALE_CTRL
], cp15_control
);
2045 /* execute cpwait to ensure outstanding operations complete */
2046 xscale_send_u32(target
, 0x53);
2049 static void xscale_enable_mmu_caches(struct target
*target
, int mmu
,
2050 int d_u_cache
, int i_cache
)
2052 struct xscale_common
*xscale
= target_to_xscale(target
);
2053 uint32_t cp15_control
;
2055 /* read cp15 control register */
2056 xscale_get_reg(&xscale
->reg_cache
->reg_list
[XSCALE_CTRL
]);
2057 cp15_control
= buf_get_u32(xscale
->reg_cache
->reg_list
[XSCALE_CTRL
].value
, 0, 32);
2060 cp15_control
|= 0x1U
;
2063 cp15_control
|= 0x4U
;
2066 cp15_control
|= 0x1000U
;
2068 /* write new cp15 control register */
2069 xscale_set_reg_u32(&xscale
->reg_cache
->reg_list
[XSCALE_CTRL
], cp15_control
);
2071 /* execute cpwait to ensure outstanding operations complete */
2072 xscale_send_u32(target
, 0x53);
2075 static int xscale_set_breakpoint(struct target
*target
,
2076 struct breakpoint
*breakpoint
)
2079 struct xscale_common
*xscale
= target_to_xscale(target
);
2081 if (target
->state
!= TARGET_HALTED
)
2083 LOG_WARNING("target not halted");
2084 return ERROR_TARGET_NOT_HALTED
;
2087 if (breakpoint
->set
)
2089 LOG_WARNING("breakpoint already set");
2093 if (breakpoint
->type
== BKPT_HARD
)
2095 uint32_t value
= breakpoint
->address
| 1;
2096 if (!xscale
->ibcr0_used
)
2098 xscale_set_reg_u32(&xscale
->reg_cache
->reg_list
[XSCALE_IBCR0
], value
);
2099 xscale
->ibcr0_used
= 1;
2100 breakpoint
->set
= 1; /* breakpoint set on first breakpoint register */
2102 else if (!xscale
->ibcr1_used
)
2104 xscale_set_reg_u32(&xscale
->reg_cache
->reg_list
[XSCALE_IBCR1
], value
);
2105 xscale
->ibcr1_used
= 1;
2106 breakpoint
->set
= 2; /* breakpoint set on second breakpoint register */
2110 LOG_ERROR("BUG: no hardware comparator available");
2114 else if (breakpoint
->type
== BKPT_SOFT
)
2116 if (breakpoint
->length
== 4)
2118 /* keep the original instruction in target endianness */
2119 if ((retval
= target_read_memory(target
, breakpoint
->address
, 4, 1, breakpoint
->orig_instr
)) != ERROR_OK
)
2123 /* write the original instruction in target endianness (arm7_9->arm_bkpt is host endian) */
2124 if ((retval
= target_write_u32(target
, breakpoint
->address
, xscale
->arm_bkpt
)) != ERROR_OK
)
2131 /* keep the original instruction in target endianness */
2132 if ((retval
= target_read_memory(target
, breakpoint
->address
, 2, 1, breakpoint
->orig_instr
)) != ERROR_OK
)
2136 /* write the original instruction in target endianness (arm7_9->arm_bkpt is host endian) */
2137 if ((retval
= target_write_u32(target
, breakpoint
->address
, xscale
->thumb_bkpt
)) != ERROR_OK
)
2142 breakpoint
->set
= 1;
2148 static int xscale_add_breakpoint(struct target
*target
,
2149 struct breakpoint
*breakpoint
)
2151 struct xscale_common
*xscale
= target_to_xscale(target
);
2153 if ((breakpoint
->type
== BKPT_HARD
) && (xscale
->ibcr_available
< 1))
2155 LOG_INFO("no breakpoint unit available for hardware breakpoint");
2156 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
2159 if ((breakpoint
->length
!= 2) && (breakpoint
->length
!= 4))
2161 LOG_INFO("only breakpoints of two (Thumb) or four (ARM) bytes length supported");
2162 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
2165 if (breakpoint
->type
== BKPT_HARD
)
2167 xscale
->ibcr_available
--;
2173 static int xscale_unset_breakpoint(struct target
*target
,
2174 struct breakpoint
*breakpoint
)
2177 struct xscale_common
*xscale
= target_to_xscale(target
);
2179 if (target
->state
!= TARGET_HALTED
)
2181 LOG_WARNING("target not halted");
2182 return ERROR_TARGET_NOT_HALTED
;
2185 if (!breakpoint
->set
)
2187 LOG_WARNING("breakpoint not set");
2191 if (breakpoint
->type
== BKPT_HARD
)
2193 if (breakpoint
->set
== 1)
2195 xscale_set_reg_u32(&xscale
->reg_cache
->reg_list
[XSCALE_IBCR0
], 0x0);
2196 xscale
->ibcr0_used
= 0;
2198 else if (breakpoint
->set
== 2)
2200 xscale_set_reg_u32(&xscale
->reg_cache
->reg_list
[XSCALE_IBCR1
], 0x0);
2201 xscale
->ibcr1_used
= 0;
2203 breakpoint
->set
= 0;
2207 /* restore original instruction (kept in target endianness) */
2208 if (breakpoint
->length
== 4)
2210 if ((retval
= target_write_memory(target
, breakpoint
->address
, 4, 1, breakpoint
->orig_instr
)) != ERROR_OK
)
2217 if ((retval
= target_write_memory(target
, breakpoint
->address
, 2, 1, breakpoint
->orig_instr
)) != ERROR_OK
)
2222 breakpoint
->set
= 0;
2228 static int xscale_remove_breakpoint(struct target
*target
, struct breakpoint
*breakpoint
)
2230 struct xscale_common
*xscale
= target_to_xscale(target
);
2232 if (target
->state
!= TARGET_HALTED
)
2234 LOG_WARNING("target not halted");
2235 return ERROR_TARGET_NOT_HALTED
;
2238 if (breakpoint
->set
)
2240 xscale_unset_breakpoint(target
, breakpoint
);
2243 if (breakpoint
->type
== BKPT_HARD
)
2244 xscale
->ibcr_available
++;
2249 static int xscale_set_watchpoint(struct target
*target
,
2250 struct watchpoint
*watchpoint
)
2252 struct xscale_common
*xscale
= target_to_xscale(target
);
2254 struct reg
*dbcon
= &xscale
->reg_cache
->reg_list
[XSCALE_DBCON
];
2255 uint32_t dbcon_value
= buf_get_u32(dbcon
->value
, 0, 32);
2257 if (target
->state
!= TARGET_HALTED
)
2259 LOG_WARNING("target not halted");
2260 return ERROR_TARGET_NOT_HALTED
;
2263 xscale_get_reg(dbcon
);
2265 switch (watchpoint
->rw
)
2277 LOG_ERROR("BUG: watchpoint->rw neither read, write nor access");
2280 if (!xscale
->dbr0_used
)
2282 xscale_set_reg_u32(&xscale
->reg_cache
->reg_list
[XSCALE_DBR0
], watchpoint
->address
);
2283 dbcon_value
|= enable
;
2284 xscale_set_reg_u32(dbcon
, dbcon_value
);
2285 watchpoint
->set
= 1;
2286 xscale
->dbr0_used
= 1;
2288 else if (!xscale
->dbr1_used
)
2290 xscale_set_reg_u32(&xscale
->reg_cache
->reg_list
[XSCALE_DBR1
], watchpoint
->address
);
2291 dbcon_value
|= enable
<< 2;
2292 xscale_set_reg_u32(dbcon
, dbcon_value
);
2293 watchpoint
->set
= 2;
2294 xscale
->dbr1_used
= 1;
2298 LOG_ERROR("BUG: no hardware comparator available");
2305 static int xscale_add_watchpoint(struct target
*target
,
2306 struct watchpoint
*watchpoint
)
2308 struct xscale_common
*xscale
= target_to_xscale(target
);
2310 if (xscale
->dbr_available
< 1)
2312 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
2315 if ((watchpoint
->length
!= 1) && (watchpoint
->length
!= 2) && (watchpoint
->length
!= 4))
2317 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
2320 xscale
->dbr_available
--;
2325 static int xscale_unset_watchpoint(struct target
*target
,
2326 struct watchpoint
*watchpoint
)
2328 struct xscale_common
*xscale
= target_to_xscale(target
);
2329 struct reg
*dbcon
= &xscale
->reg_cache
->reg_list
[XSCALE_DBCON
];
2330 uint32_t dbcon_value
= buf_get_u32(dbcon
->value
, 0, 32);
2332 if (target
->state
!= TARGET_HALTED
)
2334 LOG_WARNING("target not halted");
2335 return ERROR_TARGET_NOT_HALTED
;
2338 if (!watchpoint
->set
)
2340 LOG_WARNING("breakpoint not set");
2344 if (watchpoint
->set
== 1)
2346 dbcon_value
&= ~0x3;
2347 xscale_set_reg_u32(dbcon
, dbcon_value
);
2348 xscale
->dbr0_used
= 0;
2350 else if (watchpoint
->set
== 2)
2352 dbcon_value
&= ~0xc;
2353 xscale_set_reg_u32(dbcon
, dbcon_value
);
2354 xscale
->dbr1_used
= 0;
2356 watchpoint
->set
= 0;
2361 static int xscale_remove_watchpoint(struct target
*target
, struct watchpoint
*watchpoint
)
2363 struct xscale_common
*xscale
= target_to_xscale(target
);
2365 if (target
->state
!= TARGET_HALTED
)
2367 LOG_WARNING("target not halted");
2368 return ERROR_TARGET_NOT_HALTED
;
2371 if (watchpoint
->set
)
2373 xscale_unset_watchpoint(target
, watchpoint
);
2376 xscale
->dbr_available
++;
2381 static int xscale_get_reg(struct reg
*reg
)
2383 struct xscale_reg
*arch_info
= reg
->arch_info
;
2384 struct target
*target
= arch_info
->target
;
2385 struct xscale_common
*xscale
= target_to_xscale(target
);
2387 /* DCSR, TX and RX are accessible via JTAG */
2388 if (strcmp(reg
->name
, "XSCALE_DCSR") == 0)
2390 return xscale_read_dcsr(arch_info
->target
);
2392 else if (strcmp(reg
->name
, "XSCALE_TX") == 0)
2394 /* 1 = consume register content */
2395 return xscale_read_tx(arch_info
->target
, 1);
2397 else if (strcmp(reg
->name
, "XSCALE_RX") == 0)
2399 /* can't read from RX register (host -> debug handler) */
2402 else if (strcmp(reg
->name
, "XSCALE_TXRXCTRL") == 0)
2404 /* can't (explicitly) read from TXRXCTRL register */
2407 else /* Other DBG registers have to be transfered by the debug handler */
2409 /* send CP read request (command 0x40) */
2410 xscale_send_u32(target
, 0x40);
2412 /* send CP register number */
2413 xscale_send_u32(target
, arch_info
->dbg_handler_number
);
2415 /* read register value */
2416 xscale_read_tx(target
, 1);
2417 buf_cpy(xscale
->reg_cache
->reg_list
[XSCALE_TX
].value
, reg
->value
, 32);
2426 static int xscale_set_reg(struct reg
*reg
, uint8_t* buf
)
2428 struct xscale_reg
*arch_info
= reg
->arch_info
;
2429 struct target
*target
= arch_info
->target
;
2430 struct xscale_common
*xscale
= target_to_xscale(target
);
2431 uint32_t value
= buf_get_u32(buf
, 0, 32);
2433 /* DCSR, TX and RX are accessible via JTAG */
2434 if (strcmp(reg
->name
, "XSCALE_DCSR") == 0)
2436 buf_set_u32(xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].value
, 0, 32, value
);
2437 return xscale_write_dcsr(arch_info
->target
, -1, -1);
2439 else if (strcmp(reg
->name
, "XSCALE_RX") == 0)
2441 buf_set_u32(xscale
->reg_cache
->reg_list
[XSCALE_RX
].value
, 0, 32, value
);
2442 return xscale_write_rx(arch_info
->target
);
2444 else if (strcmp(reg
->name
, "XSCALE_TX") == 0)
2446 /* can't write to TX register (debug-handler -> host) */
2449 else if (strcmp(reg
->name
, "XSCALE_TXRXCTRL") == 0)
2451 /* can't (explicitly) write to TXRXCTRL register */
2454 else /* Other DBG registers have to be transfered by the debug handler */
2456 /* send CP write request (command 0x41) */
2457 xscale_send_u32(target
, 0x41);
2459 /* send CP register number */
2460 xscale_send_u32(target
, arch_info
->dbg_handler_number
);
2462 /* send CP register value */
2463 xscale_send_u32(target
, value
);
2464 buf_set_u32(reg
->value
, 0, 32, value
);
2470 static int xscale_write_dcsr_sw(struct target
*target
, uint32_t value
)
2472 struct xscale_common
*xscale
= target_to_xscale(target
);
2473 struct reg
*dcsr
= &xscale
->reg_cache
->reg_list
[XSCALE_DCSR
];
2474 struct xscale_reg
*dcsr_arch_info
= dcsr
->arch_info
;
2476 /* send CP write request (command 0x41) */
2477 xscale_send_u32(target
, 0x41);
2479 /* send CP register number */
2480 xscale_send_u32(target
, dcsr_arch_info
->dbg_handler_number
);
2482 /* send CP register value */
2483 xscale_send_u32(target
, value
);
2484 buf_set_u32(dcsr
->value
, 0, 32, value
);
2489 static int xscale_read_trace(struct target
*target
)
2491 struct xscale_common
*xscale
= target_to_xscale(target
);
2492 struct arm
*armv4_5
= &xscale
->armv4_5_common
;
2493 struct xscale_trace_data
**trace_data_p
;
2495 /* 258 words from debug handler
2496 * 256 trace buffer entries
2497 * 2 checkpoint addresses
2499 uint32_t trace_buffer
[258];
2500 int is_address
[256];
2503 if (target
->state
!= TARGET_HALTED
)
2505 LOG_WARNING("target must be stopped to read trace data");
2506 return ERROR_TARGET_NOT_HALTED
;
2509 /* send read trace buffer command (command 0x61) */
2510 xscale_send_u32(target
, 0x61);
2512 /* receive trace buffer content */
2513 xscale_receive(target
, trace_buffer
, 258);
2515 /* parse buffer backwards to identify address entries */
2516 for (i
= 255; i
>= 0; i
--)
2519 if (((trace_buffer
[i
] & 0xf0) == 0x90) ||
2520 ((trace_buffer
[i
] & 0xf0) == 0xd0))
2523 is_address
[--i
] = 1;
2525 is_address
[--i
] = 1;
2527 is_address
[--i
] = 1;
2529 is_address
[--i
] = 1;
2534 /* search first non-zero entry */
2535 for (j
= 0; (j
< 256) && (trace_buffer
[j
] == 0) && (!is_address
[j
]); j
++)
2540 LOG_DEBUG("no trace data collected");
2541 return ERROR_XSCALE_NO_TRACE_DATA
;
2544 for (trace_data_p
= &xscale
->trace
.data
; *trace_data_p
; trace_data_p
= &(*trace_data_p
)->next
)
2547 *trace_data_p
= malloc(sizeof(struct xscale_trace_data
));
2548 (*trace_data_p
)->next
= NULL
;
2549 (*trace_data_p
)->chkpt0
= trace_buffer
[256];
2550 (*trace_data_p
)->chkpt1
= trace_buffer
[257];
2551 (*trace_data_p
)->last_instruction
= buf_get_u32(armv4_5
->core_cache
->reg_list
[15].value
, 0, 32);
2552 (*trace_data_p
)->entries
= malloc(sizeof(struct xscale_trace_entry
) * (256 - j
));
2553 (*trace_data_p
)->depth
= 256 - j
;
2555 for (i
= j
; i
< 256; i
++)
2557 (*trace_data_p
)->entries
[i
- j
].data
= trace_buffer
[i
];
2559 (*trace_data_p
)->entries
[i
- j
].type
= XSCALE_TRACE_ADDRESS
;
2561 (*trace_data_p
)->entries
[i
- j
].type
= XSCALE_TRACE_MESSAGE
;
2567 static int xscale_read_instruction(struct target
*target
,
2568 struct arm_instruction
*instruction
)
2570 struct xscale_common
*xscale
= target_to_xscale(target
);
2577 if (!xscale
->trace
.image
)
2578 return ERROR_TRACE_IMAGE_UNAVAILABLE
;
2580 /* search for the section the current instruction belongs to */
2581 for (i
= 0; i
< xscale
->trace
.image
->num_sections
; i
++)
2583 if ((xscale
->trace
.image
->sections
[i
].base_address
<= xscale
->trace
.current_pc
) &&
2584 (xscale
->trace
.image
->sections
[i
].base_address
+ xscale
->trace
.image
->sections
[i
].size
> xscale
->trace
.current_pc
))
2593 /* current instruction couldn't be found in the image */
2594 return ERROR_TRACE_INSTRUCTION_UNAVAILABLE
;
2597 if (xscale
->trace
.core_state
== ARMV4_5_STATE_ARM
)
2600 if ((retval
= image_read_section(xscale
->trace
.image
, section
,
2601 xscale
->trace
.current_pc
- xscale
->trace
.image
->sections
[section
].base_address
,
2602 4, buf
, &size_read
)) != ERROR_OK
)
2604 LOG_ERROR("error while reading instruction: %i", retval
);
2605 return ERROR_TRACE_INSTRUCTION_UNAVAILABLE
;
2607 opcode
= target_buffer_get_u32(target
, buf
);
2608 arm_evaluate_opcode(opcode
, xscale
->trace
.current_pc
, instruction
);
2610 else if (xscale
->trace
.core_state
== ARMV4_5_STATE_THUMB
)
2613 if ((retval
= image_read_section(xscale
->trace
.image
, section
,
2614 xscale
->trace
.current_pc
- xscale
->trace
.image
->sections
[section
].base_address
,
2615 2, buf
, &size_read
)) != ERROR_OK
)
2617 LOG_ERROR("error while reading instruction: %i", retval
);
2618 return ERROR_TRACE_INSTRUCTION_UNAVAILABLE
;
2620 opcode
= target_buffer_get_u16(target
, buf
);
2621 thumb_evaluate_opcode(opcode
, xscale
->trace
.current_pc
, instruction
);
2625 LOG_ERROR("BUG: unknown core state encountered");
2632 static int xscale_branch_address(struct xscale_trace_data
*trace_data
,
2633 int i
, uint32_t *target
)
2635 /* if there are less than four entries prior to the indirect branch message
2636 * we can't extract the address */
2642 *target
= (trace_data
->entries
[i
-1].data
) | (trace_data
->entries
[i
-2].data
<< 8) |
2643 (trace_data
->entries
[i
-3].data
<< 16) | (trace_data
->entries
[i
-4].data
<< 24);
2648 static int xscale_analyze_trace(struct target
*target
, struct command_context
*cmd_ctx
)
2650 struct xscale_common
*xscale
= target_to_xscale(target
);
2652 uint32_t next_pc
= 0x0;
2653 struct xscale_trace_data
*trace_data
= xscale
->trace
.data
;
2662 xscale
->trace
.core_state
= ARMV4_5_STATE_ARM
;
2667 for (i
= 0; i
< trace_data
->depth
; i
++)
2673 if (trace_data
->entries
[i
].type
== XSCALE_TRACE_ADDRESS
)
2676 switch ((trace_data
->entries
[i
].data
& 0xf0) >> 4)
2678 case 0: /* Exceptions */
2686 exception
= (trace_data
->entries
[i
].data
& 0x70) >> 4;
2688 next_pc
= (trace_data
->entries
[i
].data
& 0xf0) >> 2;
2689 command_print(cmd_ctx
, "--- exception %i ---", (trace_data
->entries
[i
].data
& 0xf0) >> 4);
2691 case 8: /* Direct Branch */
2694 case 9: /* Indirect Branch */
2696 if (xscale_branch_address(trace_data
, i
, &next_pc
) == 0)
2701 case 13: /* Checkpointed Indirect Branch */
2702 if (xscale_branch_address(trace_data
, i
, &next_pc
) == 0)
2705 if (((chkpt
== 0) && (next_pc
!= trace_data
->chkpt0
))
2706 || ((chkpt
== 1) && (next_pc
!= trace_data
->chkpt1
)))
2707 LOG_WARNING("checkpointed indirect branch target address doesn't match checkpoint");
2709 /* explicit fall-through */
2710 case 12: /* Checkpointed Direct Branch */
2715 next_pc
= trace_data
->chkpt0
;
2718 else if (chkpt
== 1)
2721 next_pc
= trace_data
->chkpt0
;
2726 LOG_WARNING("more than two checkpointed branches encountered");
2729 case 15: /* Roll-over */
2732 default: /* Reserved */
2733 command_print(cmd_ctx
, "--- reserved trace message ---");
2734 LOG_ERROR("BUG: trace message %i is reserved", (trace_data
->entries
[i
].data
& 0xf0) >> 4);
2738 if (xscale
->trace
.pc_ok
)
2740 int executed
= (trace_data
->entries
[i
].data
& 0xf) + rollover
* 16;
2741 struct arm_instruction instruction
;
2743 if ((exception
== 6) || (exception
== 7))
2745 /* IRQ or FIQ exception, no instruction executed */
2749 while (executed
-- >= 0)
2751 if ((retval
= xscale_read_instruction(target
, &instruction
)) != ERROR_OK
)
2753 /* can't continue tracing with no image available */
2754 if (retval
== ERROR_TRACE_IMAGE_UNAVAILABLE
)
2758 else if (retval
== ERROR_TRACE_INSTRUCTION_UNAVAILABLE
)
2760 /* TODO: handle incomplete images */
2764 /* a precise abort on a load to the PC is included in the incremental
2765 * word count, other instructions causing data aborts are not included
2767 if ((executed
== 0) && (exception
== 4)
2768 && ((instruction
.type
>= ARM_LDR
) && (instruction
.type
<= ARM_LDM
)))
2770 if ((instruction
.type
== ARM_LDM
)
2771 && ((instruction
.info
.load_store_multiple
.register_list
& 0x8000) == 0))
2775 else if (((instruction
.type
>= ARM_LDR
) && (instruction
.type
<= ARM_LDRSH
))
2776 && (instruction
.info
.load_store
.Rd
!= 15))
2782 /* only the last instruction executed
2783 * (the one that caused the control flow change)
2784 * could be a taken branch
2786 if (((executed
== -1) && (branch
== 1)) &&
2787 (((instruction
.type
== ARM_B
) ||
2788 (instruction
.type
== ARM_BL
) ||
2789 (instruction
.type
== ARM_BLX
)) &&
2790 (instruction
.info
.b_bl_bx_blx
.target_address
!= 0xffffffff)))
2792 xscale
->trace
.current_pc
= instruction
.info
.b_bl_bx_blx
.target_address
;
2796 xscale
->trace
.current_pc
+= (xscale
->trace
.core_state
== ARMV4_5_STATE_ARM
) ? 4 : 2;
2798 command_print(cmd_ctx
, "%s", instruction
.text
);
2806 xscale
->trace
.current_pc
= next_pc
;
2807 xscale
->trace
.pc_ok
= 1;
2811 for (; xscale
->trace
.current_pc
< trace_data
->last_instruction
; xscale
->trace
.current_pc
+= (xscale
->trace
.core_state
== ARMV4_5_STATE_ARM
) ? 4 : 2)
2813 struct arm_instruction instruction
;
2814 if ((retval
= xscale_read_instruction(target
, &instruction
)) != ERROR_OK
)
2816 /* can't continue tracing with no image available */
2817 if (retval
== ERROR_TRACE_IMAGE_UNAVAILABLE
)
2821 else if (retval
== ERROR_TRACE_INSTRUCTION_UNAVAILABLE
)
2823 /* TODO: handle incomplete images */
2826 command_print(cmd_ctx
, "%s", instruction
.text
);
2829 trace_data
= trace_data
->next
;
2835 static const struct reg_arch_type xscale_reg_type
= {
2836 .get
= xscale_get_reg
,
2837 .set
= xscale_set_reg
,
2840 static void xscale_build_reg_cache(struct target
*target
)
2842 struct xscale_common
*xscale
= target_to_xscale(target
);
2843 struct arm
*armv4_5
= &xscale
->armv4_5_common
;
2844 struct reg_cache
**cache_p
= register_get_last_cache_p(&target
->reg_cache
);
2845 struct xscale_reg
*arch_info
= malloc(sizeof(xscale_reg_arch_info
));
2847 int num_regs
= ARRAY_SIZE(xscale_reg_arch_info
);
2849 (*cache_p
) = armv4_5_build_reg_cache(target
, armv4_5
);
2851 (*cache_p
)->next
= malloc(sizeof(struct reg_cache
));
2852 cache_p
= &(*cache_p
)->next
;
2854 /* fill in values for the xscale reg cache */
2855 (*cache_p
)->name
= "XScale registers";
2856 (*cache_p
)->next
= NULL
;
2857 (*cache_p
)->reg_list
= malloc(num_regs
* sizeof(struct reg
));
2858 (*cache_p
)->num_regs
= num_regs
;
2860 for (i
= 0; i
< num_regs
; i
++)
2862 (*cache_p
)->reg_list
[i
].name
= xscale_reg_list
[i
];
2863 (*cache_p
)->reg_list
[i
].value
= calloc(4, 1);
2864 (*cache_p
)->reg_list
[i
].dirty
= 0;
2865 (*cache_p
)->reg_list
[i
].valid
= 0;
2866 (*cache_p
)->reg_list
[i
].size
= 32;
2867 (*cache_p
)->reg_list
[i
].arch_info
= &arch_info
[i
];
2868 (*cache_p
)->reg_list
[i
].type
= &xscale_reg_type
;
2869 arch_info
[i
] = xscale_reg_arch_info
[i
];
2870 arch_info
[i
].target
= target
;
2873 xscale
->reg_cache
= (*cache_p
);
2876 static int xscale_init_target(struct command_context
*cmd_ctx
,
2877 struct target
*target
)
2879 xscale_build_reg_cache(target
);
2883 static int xscale_init_arch_info(struct target
*target
,
2884 struct xscale_common
*xscale
, struct jtag_tap
*tap
, const char *variant
)
2886 struct arm
*armv4_5
;
2887 uint32_t high_reset_branch
, low_reset_branch
;
2890 armv4_5
= &xscale
->armv4_5_common
;
2892 /* store architecture specfic data */
2893 xscale
->common_magic
= XSCALE_COMMON_MAGIC
;
2895 /* we don't really *need* a variant param ... */
2899 if (strcmp(variant
, "pxa250") == 0
2900 || strcmp(variant
, "pxa255") == 0
2901 || strcmp(variant
, "pxa26x") == 0)
2903 else if (strcmp(variant
, "pxa27x") == 0
2904 || strcmp(variant
, "ixp42x") == 0
2905 || strcmp(variant
, "ixp45x") == 0
2906 || strcmp(variant
, "ixp46x") == 0)
2908 else if (strcmp(variant
, "pxa3xx") == 0)
2911 LOG_WARNING("%s: unrecognized variant %s",
2912 tap
->dotted_name
, variant
);
2914 if (ir_length
&& ir_length
!= tap
->ir_length
) {
2915 LOG_WARNING("%s: IR length for %s is %d; fixing",
2916 tap
->dotted_name
, variant
, ir_length
);
2917 tap
->ir_length
= ir_length
;
2921 /* PXA3xx shifts the JTAG instructions */
2922 if (tap
->ir_length
== 11)
2923 xscale
->xscale_variant
= XSCALE_PXA3XX
;
2925 xscale
->xscale_variant
= XSCALE_IXP4XX_PXA2XX
;
2927 /* the debug handler isn't installed (and thus not running) at this time */
2928 xscale
->handler_address
= 0xfe000800;
2930 /* clear the vectors we keep locally for reference */
2931 memset(xscale
->low_vectors
, 0, sizeof(xscale
->low_vectors
));
2932 memset(xscale
->high_vectors
, 0, sizeof(xscale
->high_vectors
));
2934 /* no user-specified vectors have been configured yet */
2935 xscale
->static_low_vectors_set
= 0x0;
2936 xscale
->static_high_vectors_set
= 0x0;
2938 /* calculate branches to debug handler */
2939 low_reset_branch
= (xscale
->handler_address
+ 0x20 - 0x0 - 0x8) >> 2;
2940 high_reset_branch
= (xscale
->handler_address
+ 0x20 - 0xffff0000 - 0x8) >> 2;
2942 xscale
->low_vectors
[0] = ARMV4_5_B((low_reset_branch
& 0xffffff), 0);
2943 xscale
->high_vectors
[0] = ARMV4_5_B((high_reset_branch
& 0xffffff), 0);
2945 for (i
= 1; i
<= 7; i
++)
2947 xscale
->low_vectors
[i
] = ARMV4_5_B(0xfffffe, 0);
2948 xscale
->high_vectors
[i
] = ARMV4_5_B(0xfffffe, 0);
2951 /* 64kB aligned region used for DCache cleaning */
2952 xscale
->cache_clean_address
= 0xfffe0000;
2954 xscale
->hold_rst
= 0;
2955 xscale
->external_debug_break
= 0;
2957 xscale
->ibcr_available
= 2;
2958 xscale
->ibcr0_used
= 0;
2959 xscale
->ibcr1_used
= 0;
2961 xscale
->dbr_available
= 2;
2962 xscale
->dbr0_used
= 0;
2963 xscale
->dbr1_used
= 0;
2965 xscale
->arm_bkpt
= ARMV5_BKPT(0x0);
2966 xscale
->thumb_bkpt
= ARMV5_T_BKPT(0x0) & 0xffff;
2968 xscale
->vector_catch
= 0x1;
2970 xscale
->trace
.capture_status
= TRACE_IDLE
;
2971 xscale
->trace
.data
= NULL
;
2972 xscale
->trace
.image
= NULL
;
2973 xscale
->trace
.buffer_enabled
= 0;
2974 xscale
->trace
.buffer_fill
= 0;
2976 /* prepare ARMv4/5 specific information */
2977 armv4_5
->arch_info
= xscale
;
2978 armv4_5
->read_core_reg
= xscale_read_core_reg
;
2979 armv4_5
->write_core_reg
= xscale_write_core_reg
;
2980 armv4_5
->full_context
= xscale_full_context
;
2982 armv4_5_init_arch_info(target
, armv4_5
);
2984 xscale
->armv4_5_mmu
.armv4_5_cache
.ctype
= -1;
2985 xscale
->armv4_5_mmu
.get_ttb
= xscale_get_ttb
;
2986 xscale
->armv4_5_mmu
.read_memory
= xscale_read_memory
;
2987 xscale
->armv4_5_mmu
.write_memory
= xscale_write_memory
;
2988 xscale
->armv4_5_mmu
.disable_mmu_caches
= xscale_disable_mmu_caches
;
2989 xscale
->armv4_5_mmu
.enable_mmu_caches
= xscale_enable_mmu_caches
;
2990 xscale
->armv4_5_mmu
.has_tiny_pages
= 1;
2991 xscale
->armv4_5_mmu
.mmu_enabled
= 0;
2996 static int xscale_target_create(struct target
*target
, Jim_Interp
*interp
)
2998 struct xscale_common
*xscale
;
3000 if (sizeof xscale_debug_handler
- 1 > 0x800) {
3001 LOG_ERROR("debug_handler.bin: larger than 2kb");
3005 xscale
= calloc(1, sizeof(*xscale
));
3009 return xscale_init_arch_info(target
, xscale
, target
->tap
,
3013 COMMAND_HANDLER(xscale_handle_debug_handler_command
)
3015 struct target
*target
= NULL
;
3016 struct xscale_common
*xscale
;
3018 uint32_t handler_address
;
3022 LOG_ERROR("'xscale debug_handler <target#> <address>' command takes two required operands");
3026 if ((target
= get_target(CMD_ARGV
[0])) == NULL
)
3028 LOG_ERROR("target '%s' not defined", CMD_ARGV
[0]);
3032 xscale
= target_to_xscale(target
);
3033 retval
= xscale_verify_pointer(CMD_CTX
, xscale
);
3034 if (retval
!= ERROR_OK
)
3037 COMMAND_PARSE_NUMBER(u32
, CMD_ARGV
[1], handler_address
);
3039 if (((handler_address
>= 0x800) && (handler_address
<= 0x1fef800)) ||
3040 ((handler_address
>= 0xfe000800) && (handler_address
<= 0xfffff800)))
3042 xscale
->handler_address
= handler_address
;
3046 LOG_ERROR("xscale debug_handler <address> must be between 0x800 and 0x1fef800 or between 0xfe000800 and 0xfffff800");
3053 COMMAND_HANDLER(xscale_handle_cache_clean_address_command
)
3055 struct target
*target
= NULL
;
3056 struct xscale_common
*xscale
;
3058 uint32_t cache_clean_address
;
3062 return ERROR_COMMAND_SYNTAX_ERROR
;
3065 target
= get_target(CMD_ARGV
[0]);
3068 LOG_ERROR("target '%s' not defined", CMD_ARGV
[0]);
3071 xscale
= target_to_xscale(target
);
3072 retval
= xscale_verify_pointer(CMD_CTX
, xscale
);
3073 if (retval
!= ERROR_OK
)
3076 COMMAND_PARSE_NUMBER(u32
, CMD_ARGV
[1], cache_clean_address
);
3078 if (cache_clean_address
& 0xffff)
3080 LOG_ERROR("xscale cache_clean_address <address> must be 64kb aligned");
3084 xscale
->cache_clean_address
= cache_clean_address
;
3090 COMMAND_HANDLER(xscale_handle_cache_info_command
)
3092 struct target
*target
= get_current_target(CMD_CTX
);
3093 struct xscale_common
*xscale
= target_to_xscale(target
);
3096 retval
= xscale_verify_pointer(CMD_CTX
, xscale
);
3097 if (retval
!= ERROR_OK
)
3100 return armv4_5_handle_cache_info_command(CMD_CTX
, &xscale
->armv4_5_mmu
.armv4_5_cache
);
3103 static int xscale_virt2phys(struct target
*target
,
3104 uint32_t virtual, uint32_t *physical
)
3106 struct xscale_common
*xscale
= target_to_xscale(target
);
3112 if (xscale
->common_magic
!= XSCALE_COMMON_MAGIC
) {
3113 LOG_ERROR(xscale_not
);
3114 return ERROR_TARGET_INVALID
;
3117 uint32_t ret
= armv4_5_mmu_translate_va(target
, &xscale
->armv4_5_mmu
, virtual, &type
, &cb
, &domain
, &ap
);
3126 static int xscale_mmu(struct target
*target
, int *enabled
)
3128 struct xscale_common
*xscale
= target_to_xscale(target
);
3130 if (target
->state
!= TARGET_HALTED
)
3132 LOG_ERROR("Target not halted");
3133 return ERROR_TARGET_INVALID
;
3135 *enabled
= xscale
->armv4_5_mmu
.mmu_enabled
;
3139 COMMAND_HANDLER(xscale_handle_mmu_command
)
3141 struct target
*target
= get_current_target(CMD_CTX
);
3142 struct xscale_common
*xscale
= target_to_xscale(target
);
3145 retval
= xscale_verify_pointer(CMD_CTX
, xscale
);
3146 if (retval
!= ERROR_OK
)
3149 if (target
->state
!= TARGET_HALTED
)
3151 command_print(CMD_CTX
, "target must be stopped for \"%s\" command", CMD_NAME
);
3158 COMMAND_PARSE_ENABLE(CMD_ARGV
[0], enable
);
3160 xscale_enable_mmu_caches(target
, 1, 0, 0);
3162 xscale_disable_mmu_caches(target
, 1, 0, 0);
3163 xscale
->armv4_5_mmu
.mmu_enabled
= enable
;
3166 command_print(CMD_CTX
, "mmu %s", (xscale
->armv4_5_mmu
.mmu_enabled
) ? "enabled" : "disabled");
3171 COMMAND_HANDLER(xscale_handle_idcache_command
)
3173 struct target
*target
= get_current_target(CMD_CTX
);
3174 struct xscale_common
*xscale
= target_to_xscale(target
);
3176 int retval
= xscale_verify_pointer(CMD_CTX
, xscale
);
3177 if (retval
!= ERROR_OK
)
3180 if (target
->state
!= TARGET_HALTED
)
3182 command_print(CMD_CTX
, "target must be stopped for \"%s\" command", CMD_NAME
);
3187 COMMAND_PARSE_BOOL(CMD_NAME
, icache
, "icache", "dcache");
3192 COMMAND_PARSE_ENABLE(CMD_ARGV
[0], enable
);
3194 xscale_enable_mmu_caches(target
, 1, 0, 0);
3196 xscale_disable_mmu_caches(target
, 1, 0, 0);
3198 xscale
->armv4_5_mmu
.armv4_5_cache
.i_cache_enabled
= enable
;
3200 xscale
->armv4_5_mmu
.armv4_5_cache
.d_u_cache_enabled
= enable
;
3203 bool enabled
= icache
?
3204 xscale
->armv4_5_mmu
.armv4_5_cache
.i_cache_enabled
:
3205 xscale
->armv4_5_mmu
.armv4_5_cache
.d_u_cache_enabled
;
3206 const char *msg
= enabled
? "enabled" : "disabled";
3207 command_print(CMD_CTX
, "%s %s", CMD_NAME
, msg
);
3212 COMMAND_HANDLER(xscale_handle_vector_catch_command
)
3214 struct target
*target
= get_current_target(CMD_CTX
);
3215 struct xscale_common
*xscale
= target_to_xscale(target
);
3218 retval
= xscale_verify_pointer(CMD_CTX
, xscale
);
3219 if (retval
!= ERROR_OK
)
3224 command_print(CMD_CTX
, "usage: xscale vector_catch [mask]");
3228 COMMAND_PARSE_NUMBER(u8
, CMD_ARGV
[0], xscale
->vector_catch
);
3229 buf_set_u32(xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].value
, 16, 8, xscale
->vector_catch
);
3230 xscale_write_dcsr(target
, -1, -1);
3233 command_print(CMD_CTX
, "vector catch mask: 0x%2.2x", xscale
->vector_catch
);
3239 COMMAND_HANDLER(xscale_handle_vector_table_command
)
3241 struct target
*target
= get_current_target(CMD_CTX
);
3242 struct xscale_common
*xscale
= target_to_xscale(target
);
3246 retval
= xscale_verify_pointer(CMD_CTX
, xscale
);
3247 if (retval
!= ERROR_OK
)
3250 if (CMD_ARGC
== 0) /* print current settings */
3254 command_print(CMD_CTX
, "active user-set static vectors:");
3255 for (idx
= 1; idx
< 8; idx
++)
3256 if (xscale
->static_low_vectors_set
& (1 << idx
))
3257 command_print(CMD_CTX
, "low %d: 0x%" PRIx32
, idx
, xscale
->static_low_vectors
[idx
]);
3258 for (idx
= 1; idx
< 8; idx
++)
3259 if (xscale
->static_high_vectors_set
& (1 << idx
))
3260 command_print(CMD_CTX
, "high %d: 0x%" PRIx32
, idx
, xscale
->static_high_vectors
[idx
]);
3269 COMMAND_PARSE_NUMBER(int, CMD_ARGV
[1], idx
);
3271 COMMAND_PARSE_NUMBER(u32
, CMD_ARGV
[2], vec
);
3273 if (idx
< 1 || idx
>= 8)
3276 if (!err
&& strcmp(CMD_ARGV
[0], "low") == 0)
3278 xscale
->static_low_vectors_set
|= (1<<idx
);
3279 xscale
->static_low_vectors
[idx
] = vec
;
3281 else if (!err
&& (strcmp(CMD_ARGV
[0], "high") == 0))
3283 xscale
->static_high_vectors_set
|= (1<<idx
);
3284 xscale
->static_high_vectors
[idx
] = vec
;
3291 command_print(CMD_CTX
, "usage: xscale vector_table <high|low> <index> <code>");
3297 COMMAND_HANDLER(xscale_handle_trace_buffer_command
)
3299 struct target
*target
= get_current_target(CMD_CTX
);
3300 struct xscale_common
*xscale
= target_to_xscale(target
);
3301 struct arm
*armv4_5
= &xscale
->armv4_5_common
;
3302 uint32_t dcsr_value
;
3305 retval
= xscale_verify_pointer(CMD_CTX
, xscale
);
3306 if (retval
!= ERROR_OK
)
3309 if (target
->state
!= TARGET_HALTED
)
3311 command_print(CMD_CTX
, "target must be stopped for \"%s\" command", CMD_NAME
);
3315 if ((CMD_ARGC
>= 1) && (strcmp("enable", CMD_ARGV
[0]) == 0))
3317 struct xscale_trace_data
*td
, *next_td
;
3318 xscale
->trace
.buffer_enabled
= 1;
3320 /* free old trace data */
3321 td
= xscale
->trace
.data
;
3331 xscale
->trace
.data
= NULL
;
3333 else if ((CMD_ARGC
>= 1) && (strcmp("disable", CMD_ARGV
[0]) == 0))
3335 xscale
->trace
.buffer_enabled
= 0;
3338 if ((CMD_ARGC
>= 2) && (strcmp("fill", CMD_ARGV
[1]) == 0))
3342 COMMAND_PARSE_NUMBER(u32
, CMD_ARGV
[2], fill
);
3343 xscale
->trace
.buffer_fill
= fill
;
3345 else if ((CMD_ARGC
>= 2) && (strcmp("wrap", CMD_ARGV
[1]) == 0))
3347 xscale
->trace
.buffer_fill
= -1;
3350 if (xscale
->trace
.buffer_enabled
)
3352 /* if we enable the trace buffer in fill-once
3353 * mode we know the address of the first instruction */
3354 xscale
->trace
.pc_ok
= 1;
3355 xscale
->trace
.current_pc
= buf_get_u32(armv4_5
->core_cache
->reg_list
[15].value
, 0, 32);
3359 /* otherwise the address is unknown, and we have no known good PC */
3360 xscale
->trace
.pc_ok
= 0;
3363 command_print(CMD_CTX
, "trace buffer %s (%s)",
3364 (xscale
->trace
.buffer_enabled
) ? "enabled" : "disabled",
3365 (xscale
->trace
.buffer_fill
> 0) ? "fill" : "wrap");
3367 dcsr_value
= buf_get_u32(xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].value
, 0, 32);
3368 if (xscale
->trace
.buffer_fill
>= 0)
3369 xscale_write_dcsr_sw(target
, (dcsr_value
& 0xfffffffc) | 2);
3371 xscale_write_dcsr_sw(target
, dcsr_value
& 0xfffffffc);
3376 COMMAND_HANDLER(xscale_handle_trace_image_command
)
3378 struct target
*target
= get_current_target(CMD_CTX
);
3379 struct xscale_common
*xscale
= target_to_xscale(target
);
3384 command_print(CMD_CTX
, "usage: xscale trace_image <file> [base address] [type]");
3388 retval
= xscale_verify_pointer(CMD_CTX
, xscale
);
3389 if (retval
!= ERROR_OK
)
3392 if (xscale
->trace
.image
)
3394 image_close(xscale
->trace
.image
);
3395 free(xscale
->trace
.image
);
3396 command_print(CMD_CTX
, "previously loaded image found and closed");
3399 xscale
->trace
.image
= malloc(sizeof(struct image
));
3400 xscale
->trace
.image
->base_address_set
= 0;
3401 xscale
->trace
.image
->start_address_set
= 0;
3403 /* a base address isn't always necessary, default to 0x0 (i.e. don't relocate) */
3406 xscale
->trace
.image
->base_address_set
= 1;
3407 COMMAND_PARSE_NUMBER(int, CMD_ARGV
[1], xscale
->trace
.image
->base_address
);
3411 xscale
->trace
.image
->base_address_set
= 0;
3414 if (image_open(xscale
->trace
.image
, CMD_ARGV
[0], (CMD_ARGC
>= 3) ? CMD_ARGV
[2] : NULL
) != ERROR_OK
)
3416 free(xscale
->trace
.image
);
3417 xscale
->trace
.image
= NULL
;
3424 COMMAND_HANDLER(xscale_handle_dump_trace_command
)
3426 struct target
*target
= get_current_target(CMD_CTX
);
3427 struct xscale_common
*xscale
= target_to_xscale(target
);
3428 struct xscale_trace_data
*trace_data
;
3432 retval
= xscale_verify_pointer(CMD_CTX
, xscale
);
3433 if (retval
!= ERROR_OK
)
3436 if (target
->state
!= TARGET_HALTED
)
3438 command_print(CMD_CTX
, "target must be stopped for \"%s\" command", CMD_NAME
);
3444 command_print(CMD_CTX
, "usage: xscale dump_trace <file>");
3448 trace_data
= xscale
->trace
.data
;
3452 command_print(CMD_CTX
, "no trace data collected");
3456 if (fileio_open(&file
, CMD_ARGV
[0], FILEIO_WRITE
, FILEIO_BINARY
) != ERROR_OK
)
3465 fileio_write_u32(&file
, trace_data
->chkpt0
);
3466 fileio_write_u32(&file
, trace_data
->chkpt1
);
3467 fileio_write_u32(&file
, trace_data
->last_instruction
);
3468 fileio_write_u32(&file
, trace_data
->depth
);
3470 for (i
= 0; i
< trace_data
->depth
; i
++)
3471 fileio_write_u32(&file
, trace_data
->entries
[i
].data
| ((trace_data
->entries
[i
].type
& 0xffff) << 16));
3473 trace_data
= trace_data
->next
;
3476 fileio_close(&file
);
3481 COMMAND_HANDLER(xscale_handle_analyze_trace_buffer_command
)
3483 struct target
*target
= get_current_target(CMD_CTX
);
3484 struct xscale_common
*xscale
= target_to_xscale(target
);
3487 retval
= xscale_verify_pointer(CMD_CTX
, xscale
);
3488 if (retval
!= ERROR_OK
)
3491 xscale_analyze_trace(target
, CMD_CTX
);
3496 COMMAND_HANDLER(xscale_handle_cp15
)
3498 struct target
*target
= get_current_target(CMD_CTX
);
3499 struct xscale_common
*xscale
= target_to_xscale(target
);
3502 retval
= xscale_verify_pointer(CMD_CTX
, xscale
);
3503 if (retval
!= ERROR_OK
)
3506 if (target
->state
!= TARGET_HALTED
)
3508 command_print(CMD_CTX
, "target must be stopped for \"%s\" command", CMD_NAME
);
3511 uint32_t reg_no
= 0;
3512 struct reg
*reg
= NULL
;
3515 COMMAND_PARSE_NUMBER(u32
, CMD_ARGV
[0], reg_no
);
3516 /*translate from xscale cp15 register no to openocd register*/
3520 reg_no
= XSCALE_MAINID
;
3523 reg_no
= XSCALE_CTRL
;
3526 reg_no
= XSCALE_TTB
;
3529 reg_no
= XSCALE_DAC
;
3532 reg_no
= XSCALE_FSR
;
3535 reg_no
= XSCALE_FAR
;
3538 reg_no
= XSCALE_PID
;
3541 reg_no
= XSCALE_CPACCESS
;
3544 command_print(CMD_CTX
, "invalid register number");
3545 return ERROR_INVALID_ARGUMENTS
;
3547 reg
= &xscale
->reg_cache
->reg_list
[reg_no
];
3554 /* read cp15 control register */
3555 xscale_get_reg(reg
);
3556 value
= buf_get_u32(reg
->value
, 0, 32);
3557 command_print(CMD_CTX
, "%s (/%i): 0x%" PRIx32
"", reg
->name
, (int)(reg
->size
), value
);
3559 else if (CMD_ARGC
== 2)
3562 COMMAND_PARSE_NUMBER(u32
, CMD_ARGV
[1], value
);
3564 /* send CP write request (command 0x41) */
3565 xscale_send_u32(target
, 0x41);
3567 /* send CP register number */
3568 xscale_send_u32(target
, reg_no
);
3570 /* send CP register value */
3571 xscale_send_u32(target
, value
);
3573 /* execute cpwait to ensure outstanding operations complete */
3574 xscale_send_u32(target
, 0x53);
3578 command_print(CMD_CTX
, "usage: cp15 [register]<, [value]>");
3584 static const struct command_registration xscale_exec_command_handlers
[] = {
3586 .name
= "cache_info",
3587 .handler
= &xscale_handle_cache_info_command
,
3588 .mode
= COMMAND_EXEC
, NULL
,
3593 .handler
= &xscale_handle_mmu_command
,
3594 .mode
= COMMAND_EXEC
,
3595 .usage
= "[enable|disable]",
3596 .help
= "enable or disable the MMU",
3600 .handler
= &xscale_handle_idcache_command
,
3601 .mode
= COMMAND_EXEC
,
3602 .usage
= "[enable|disable]",
3603 .help
= "enable or disable the ICache",
3607 .handler
= &xscale_handle_idcache_command
,
3608 .mode
= COMMAND_EXEC
,
3609 .usage
= "[enable|disable]",
3610 .help
= "enable or disable the DCache",
3614 .name
= "vector_catch",
3615 .handler
= &xscale_handle_vector_catch_command
,
3616 .mode
= COMMAND_EXEC
,
3617 .help
= "mask of vectors that should be caught",
3618 .usage
= "[<mask>]",
3621 .name
= "vector_table",
3622 .handler
= &xscale_handle_vector_table_command
,
3623 .mode
= COMMAND_EXEC
,
3624 .usage
= "<high|low> <index> <code>",
3625 .help
= "set static code for exception handler entry",
3629 .name
= "trace_buffer",
3630 .handler
= &xscale_handle_trace_buffer_command
,
3631 .mode
= COMMAND_EXEC
,
3632 .usage
= "<enable | disable> [fill [n]|wrap]",
3635 .name
= "dump_trace",
3636 .handler
= &xscale_handle_dump_trace_command
,
3637 .mode
= COMMAND_EXEC
,
3638 .help
= "dump content of trace buffer to <file>",
3642 .name
= "analyze_trace",
3643 .handler
= &xscale_handle_analyze_trace_buffer_command
,
3644 .mode
= COMMAND_EXEC
,
3645 .help
= "analyze content of trace buffer",
3648 .name
= "trace_image",
3649 .handler
= &xscale_handle_trace_image_command
,
3651 .help
= "load image from <file> [base address]",
3652 .usage
= "<file> [address] [type]",
3657 .handler
= &xscale_handle_cp15
,
3658 .mode
= COMMAND_EXEC
,
3659 .help
= "access coproc 15",
3660 .usage
= "<register> [value]",
3662 COMMAND_REGISTRATION_DONE
3664 static const struct command_registration xscale_any_command_handlers
[] = {
3666 .name
= "debug_handler",
3667 .handler
= &xscale_handle_debug_handler_command
,
3668 .mode
= COMMAND_ANY
,
3669 .usage
= "<target#> <address>",
3672 .name
= "cache_clean_address",
3673 .handler
= &xscale_handle_cache_clean_address_command
,
3674 .mode
= COMMAND_ANY
,
3677 .chain
= xscale_exec_command_handlers
,
3679 COMMAND_REGISTRATION_DONE
3681 static const struct command_registration xscale_command_handlers
[] = {
3683 .chain
= arm_command_handlers
,
3687 .mode
= COMMAND_ANY
,
3688 .help
= "xscale command group",
3689 .chain
= xscale_any_command_handlers
,
3691 COMMAND_REGISTRATION_DONE
3694 struct target_type xscale_target
=
3698 .poll
= xscale_poll
,
3699 .arch_state
= xscale_arch_state
,
3701 .target_request_data
= NULL
,
3703 .halt
= xscale_halt
,
3704 .resume
= xscale_resume
,
3705 .step
= xscale_step
,
3707 .assert_reset
= xscale_assert_reset
,
3708 .deassert_reset
= xscale_deassert_reset
,
3709 .soft_reset_halt
= NULL
,
3711 .get_gdb_reg_list
= armv4_5_get_gdb_reg_list
,
3713 .read_memory
= xscale_read_memory
,
3714 .read_phys_memory
= xscale_read_phys_memory
,
3715 .write_memory
= xscale_write_memory
,
3716 .write_phys_memory
= xscale_write_phys_memory
,
3717 .bulk_write_memory
= xscale_bulk_write_memory
,
3719 .checksum_memory
= arm_checksum_memory
,
3720 .blank_check_memory
= arm_blank_check_memory
,
3722 .run_algorithm
= armv4_5_run_algorithm
,
3724 .add_breakpoint
= xscale_add_breakpoint
,
3725 .remove_breakpoint
= xscale_remove_breakpoint
,
3726 .add_watchpoint
= xscale_add_watchpoint
,
3727 .remove_watchpoint
= xscale_remove_watchpoint
,
3729 .commands
= xscale_command_handlers
,
3730 .target_create
= xscale_target_create
,
3731 .init_target
= xscale_init_target
,
3733 .virt2phys
= xscale_virt2phys
,