1 /***************************************************************************
2 * Copyright (C) 2006, 2007 by Dominic Rath *
3 * Dominic.Rath@gmx.de *
5 * Copyright (C) 2007,2008 Øyvind Harboe *
6 * oyvind.harboe@zylin.com *
8 * Copyright (C) 2009 Michael Schwingen *
9 * michael@schwingen.org *
11 * This program is free software; you can redistribute it and/or modify *
12 * it under the terms of the GNU General Public License as published by *
13 * the Free Software Foundation; either version 2 of the License, or *
14 * (at your option) any later version. *
16 * This program is distributed in the hope that it will be useful, *
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
19 * GNU General Public License for more details. *
21 * You should have received a copy of the GNU General Public License *
22 * along with this program; if not, write to the *
23 * Free Software Foundation, Inc., *
24 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
25 ***************************************************************************/
30 #include "breakpoints.h"
32 #include "target_type.h"
34 #include "arm_simulator.h"
35 #include "arm_disassembler.h"
36 #include <helper/time_support.h>
39 #include "arm_opcodes.h"
44 * Important XScale documents available as of October 2009 include:
46 * Intel XScale® Core Developer’s Manual, January 2004
47 * Order Number: 273473-002
48 * This has a chapter detailing debug facilities, and punts some
49 * details to chip-specific microarchitecture documents.
51 * Hot-Debug for Intel XScale® Core Debug White Paper, May 2005
52 * Document Number: 273539-005
53 * Less detailed than the developer's manual, but summarizes those
54 * missing details (for most XScales) and gives LOTS of notes about
55 * debugger/handler interaction issues. Presents a simpler reset
56 * and load-handler sequence than the arch doc. (Note, OpenOCD
57 * doesn't currently support "Hot-Debug" as defined there.)
59 * Chip-specific microarchitecture documents may also be useful.
63 /* forward declarations */
64 static int xscale_resume(struct target
*, int current
,
65 uint32_t address
, int handle_breakpoints
, int debug_execution
);
66 static int xscale_debug_entry(struct target
*);
67 static int xscale_restore_banked(struct target
*);
68 static int xscale_get_reg(struct reg
*reg
);
69 static int xscale_set_reg(struct reg
*reg
, uint8_t *buf
);
70 static int xscale_set_breakpoint(struct target
*, struct breakpoint
*);
71 static int xscale_set_watchpoint(struct target
*, struct watchpoint
*);
72 static int xscale_unset_breakpoint(struct target
*, struct breakpoint
*);
73 static int xscale_read_trace(struct target
*);
76 /* This XScale "debug handler" is loaded into the processor's
77 * mini-ICache, which is 2K of code writable only via JTAG.
79 * FIXME the OpenOCD "bin2char" utility currently doesn't handle
80 * binary files cleanly. It's string oriented, and terminates them
81 * with a NUL character. Better would be to generate the constants
82 * and let other code decide names, scoping, and other housekeeping.
84 static /* unsigned const char xscale_debug_handler[] = ... */
85 #include "xscale_debug.h"
87 static char *const xscale_reg_list
[] =
89 "XSCALE_MAINID", /* 0 */
99 "XSCALE_IBCR0", /* 10 */
109 "XSCALE_RX", /* 20 */
113 static const struct xscale_reg xscale_reg_arch_info
[] =
115 {XSCALE_MAINID
, NULL
},
116 {XSCALE_CACHETYPE
, NULL
},
118 {XSCALE_AUXCTRL
, NULL
},
124 {XSCALE_CPACCESS
, NULL
},
125 {XSCALE_IBCR0
, NULL
},
126 {XSCALE_IBCR1
, NULL
},
129 {XSCALE_DBCON
, NULL
},
130 {XSCALE_TBREG
, NULL
},
131 {XSCALE_CHKPT0
, NULL
},
132 {XSCALE_CHKPT1
, NULL
},
133 {XSCALE_DCSR
, NULL
}, /* DCSR accessed via JTAG or SW */
134 {-1, NULL
}, /* TX accessed via JTAG */
135 {-1, NULL
}, /* RX accessed via JTAG */
136 {-1, NULL
}, /* TXRXCTRL implicit access via JTAG */
139 /* convenience wrapper to access XScale specific registers */
140 static int xscale_set_reg_u32(struct reg
*reg
, uint32_t value
)
144 buf_set_u32(buf
, 0, 32, value
);
146 return xscale_set_reg(reg
, buf
);
149 static const char xscale_not
[] = "target is not an XScale";
151 static int xscale_verify_pointer(struct command_context
*cmd_ctx
,
152 struct xscale_common
*xscale
)
154 if (xscale
->common_magic
!= XSCALE_COMMON_MAGIC
) {
155 command_print(cmd_ctx
, xscale_not
);
156 return ERROR_TARGET_INVALID
;
161 static int xscale_jtag_set_instr(struct jtag_tap
*tap
, uint32_t new_instr
, tap_state_t end_state
)
163 assert (tap
!= NULL
);
165 if (buf_get_u32(tap
->cur_instr
, 0, tap
->ir_length
) != new_instr
)
167 struct scan_field field
;
170 memset(&field
, 0, sizeof field
);
171 field
.num_bits
= tap
->ir_length
;
172 field
.out_value
= scratch
;
173 buf_set_u32(scratch
, 0, field
.num_bits
, new_instr
);
175 jtag_add_ir_scan(tap
, &field
, 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 xscale_jtag_set_instr(target
->tap
,
194 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].num_bits
= 3;
203 fields
[0].out_value
= &field0
;
205 fields
[0].in_value
= &tmp
;
207 fields
[1].num_bits
= 32;
208 fields
[1].in_value
= xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].value
;
210 fields
[2].num_bits
= 1;
211 fields
[2].out_value
= &field2
;
213 fields
[2].in_value
= &tmp2
;
215 jtag_add_dr_scan(target
->tap
, 3, fields
, TAP_DRPAUSE
);
217 jtag_check_value_mask(fields
+ 0, &field0_check_value
, &field0_check_mask
);
218 jtag_check_value_mask(fields
+ 2, &field2_check_value
, &field2_check_mask
);
220 if ((retval
= jtag_execute_queue()) != ERROR_OK
)
222 LOG_ERROR("JTAG error while reading DCSR");
226 xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].dirty
= 0;
227 xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].valid
= 1;
229 /* write the register with the value we just read
230 * on this second pass, only the first bit of field0 is guaranteed to be 0)
232 field0_check_mask
= 0x1;
233 fields
[1].out_value
= xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].value
;
234 fields
[1].in_value
= NULL
;
236 jtag_add_dr_scan(target
->tap
, 3, fields
, TAP_DRPAUSE
);
238 /* DANGER!!! this must be here. It will make sure that the arguments
239 * to jtag_set_check_value() does not go out of scope! */
240 return jtag_execute_queue();
244 static void xscale_getbuf(jtag_callback_data_t arg
)
246 uint8_t *in
= (uint8_t *)arg
;
247 *((uint32_t *)in
) = buf_get_u32(in
, 0, 32);
250 static int xscale_receive(struct target
*target
, uint32_t *buffer
, int num_words
)
253 return ERROR_INVALID_ARGUMENTS
;
255 struct xscale_common
*xscale
= target_to_xscale(target
);
256 int retval
= ERROR_OK
;
258 struct scan_field fields
[3];
259 uint8_t *field0
= malloc(num_words
* 1);
260 uint8_t field0_check_value
= 0x2;
261 uint8_t field0_check_mask
= 0x6;
262 uint32_t *field1
= malloc(num_words
* 4);
263 uint8_t field2_check_value
= 0x0;
264 uint8_t field2_check_mask
= 0x1;
266 int words_scheduled
= 0;
269 path
[0] = TAP_DRSELECT
;
270 path
[1] = TAP_DRCAPTURE
;
271 path
[2] = TAP_DRSHIFT
;
273 memset(&fields
, 0, sizeof fields
);
275 fields
[0].num_bits
= 3;
276 fields
[0].check_value
= &field0_check_value
;
277 fields
[0].check_mask
= &field0_check_mask
;
279 fields
[1].num_bits
= 32;
281 fields
[2].num_bits
= 1;
282 fields
[2].check_value
= &field2_check_value
;
283 fields
[2].check_mask
= &field2_check_mask
;
285 xscale_jtag_set_instr(target
->tap
,
286 XSCALE_DBGTX
<< xscale
->xscale_variant
,
288 jtag_add_runtest(1, TAP_IDLE
); /* ensures that we're in the TAP_IDLE state as the above could be a no-op */
290 /* repeat until all words have been collected */
292 while (words_done
< num_words
)
296 for (i
= words_done
; i
< num_words
; i
++)
298 fields
[0].in_value
= &field0
[i
];
300 jtag_add_pathmove(3, path
);
302 fields
[1].in_value
= (uint8_t *)(field1
+ i
);
304 jtag_add_dr_scan_check(target
->tap
, 3, fields
, TAP_IDLE
);
306 jtag_add_callback(xscale_getbuf
, (jtag_callback_data_t
)(field1
+ i
));
311 if ((retval
= jtag_execute_queue()) != ERROR_OK
)
313 LOG_ERROR("JTAG error while receiving data from debug handler");
317 /* examine results */
318 for (i
= words_done
; i
< num_words
; i
++)
320 if (!(field0
[0] & 1))
322 /* move backwards if necessary */
324 for (j
= i
; j
< num_words
- 1; j
++)
326 field0
[j
] = field0
[j
+ 1];
327 field1
[j
] = field1
[j
+ 1];
332 if (words_scheduled
== 0)
334 if (attempts
++==1000)
336 LOG_ERROR("Failed to receiving data from debug handler after 1000 attempts");
337 retval
= ERROR_TARGET_TIMEOUT
;
342 words_done
+= words_scheduled
;
345 for (i
= 0; i
< num_words
; i
++)
346 *(buffer
++) = buf_get_u32((uint8_t*)&field1
[i
], 0, 32);
353 static int xscale_read_tx(struct target
*target
, int consume
)
355 struct xscale_common
*xscale
= target_to_xscale(target
);
357 tap_state_t noconsume_path
[6];
359 struct timeval timeout
, now
;
360 struct scan_field fields
[3];
361 uint8_t field0_in
= 0x0;
362 uint8_t field0_check_value
= 0x2;
363 uint8_t field0_check_mask
= 0x6;
364 uint8_t field2_check_value
= 0x0;
365 uint8_t field2_check_mask
= 0x1;
367 xscale_jtag_set_instr(target
->tap
,
368 XSCALE_DBGTX
<< xscale
->xscale_variant
,
371 path
[0] = TAP_DRSELECT
;
372 path
[1] = TAP_DRCAPTURE
;
373 path
[2] = TAP_DRSHIFT
;
375 noconsume_path
[0] = TAP_DRSELECT
;
376 noconsume_path
[1] = TAP_DRCAPTURE
;
377 noconsume_path
[2] = TAP_DREXIT1
;
378 noconsume_path
[3] = TAP_DRPAUSE
;
379 noconsume_path
[4] = TAP_DREXIT2
;
380 noconsume_path
[5] = TAP_DRSHIFT
;
382 memset(&fields
, 0, sizeof fields
);
384 fields
[0].num_bits
= 3;
385 fields
[0].in_value
= &field0_in
;
387 fields
[1].num_bits
= 32;
388 fields
[1].in_value
= xscale
->reg_cache
->reg_list
[XSCALE_TX
].value
;
390 fields
[2].num_bits
= 1;
392 fields
[2].in_value
= &tmp
;
394 gettimeofday(&timeout
, NULL
);
395 timeval_add_time(&timeout
, 1, 0);
399 /* if we want to consume the register content (i.e. clear TX_READY),
400 * we have to go straight from Capture-DR to Shift-DR
401 * otherwise, we go from Capture-DR to Exit1-DR to Pause-DR
404 jtag_add_pathmove(3, path
);
407 jtag_add_pathmove(ARRAY_SIZE(noconsume_path
), noconsume_path
);
410 jtag_add_dr_scan(target
->tap
, 3, fields
, TAP_IDLE
);
412 jtag_check_value_mask(fields
+ 0, &field0_check_value
, &field0_check_mask
);
413 jtag_check_value_mask(fields
+ 2, &field2_check_value
, &field2_check_mask
);
415 if ((retval
= jtag_execute_queue()) != ERROR_OK
)
417 LOG_ERROR("JTAG error while reading TX");
418 return ERROR_TARGET_TIMEOUT
;
421 gettimeofday(&now
, NULL
);
422 if ((now
.tv_sec
> timeout
.tv_sec
) || ((now
.tv_sec
== timeout
.tv_sec
)&& (now
.tv_usec
> timeout
.tv_usec
)))
424 LOG_ERROR("time out reading TX register");
425 return ERROR_TARGET_TIMEOUT
;
427 if (!((!(field0_in
& 1)) && consume
))
431 if (debug_level
>= 3)
433 LOG_DEBUG("waiting 100ms");
434 alive_sleep(100); /* avoid flooding the logs */
442 if (!(field0_in
& 1))
443 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
448 static int xscale_write_rx(struct target
*target
)
450 struct xscale_common
*xscale
= target_to_xscale(target
);
452 struct timeval timeout
, now
;
453 struct scan_field fields
[3];
454 uint8_t field0_out
= 0x0;
455 uint8_t field0_in
= 0x0;
456 uint8_t field0_check_value
= 0x2;
457 uint8_t field0_check_mask
= 0x6;
458 uint8_t field2
= 0x0;
459 uint8_t field2_check_value
= 0x0;
460 uint8_t field2_check_mask
= 0x1;
462 xscale_jtag_set_instr(target
->tap
,
463 XSCALE_DBGRX
<< xscale
->xscale_variant
,
466 memset(&fields
, 0, sizeof fields
);
468 fields
[0].num_bits
= 3;
469 fields
[0].out_value
= &field0_out
;
470 fields
[0].in_value
= &field0_in
;
472 fields
[1].num_bits
= 32;
473 fields
[1].out_value
= xscale
->reg_cache
->reg_list
[XSCALE_RX
].value
;
475 fields
[2].num_bits
= 1;
476 fields
[2].out_value
= &field2
;
478 fields
[2].in_value
= &tmp
;
480 gettimeofday(&timeout
, NULL
);
481 timeval_add_time(&timeout
, 1, 0);
483 /* poll until rx_read is low */
484 LOG_DEBUG("polling RX");
487 jtag_add_dr_scan(target
->tap
, 3, fields
, TAP_IDLE
);
489 jtag_check_value_mask(fields
+ 0, &field0_check_value
, &field0_check_mask
);
490 jtag_check_value_mask(fields
+ 2, &field2_check_value
, &field2_check_mask
);
492 if ((retval
= jtag_execute_queue()) != ERROR_OK
)
494 LOG_ERROR("JTAG error while writing RX");
498 gettimeofday(&now
, NULL
);
499 if ((now
.tv_sec
> timeout
.tv_sec
) || ((now
.tv_sec
== timeout
.tv_sec
)&& (now
.tv_usec
> timeout
.tv_usec
)))
501 LOG_ERROR("time out writing RX register");
502 return ERROR_TARGET_TIMEOUT
;
504 if (!(field0_in
& 1))
506 if (debug_level
>= 3)
508 LOG_DEBUG("waiting 100ms");
509 alive_sleep(100); /* avoid flooding the logs */
519 jtag_add_dr_scan(target
->tap
, 3, fields
, TAP_IDLE
);
521 if ((retval
= jtag_execute_queue()) != ERROR_OK
)
523 LOG_ERROR("JTAG error while writing RX");
530 /* send count elements of size byte to the debug handler */
531 static int xscale_send(struct target
*target
, uint8_t *buffer
, int count
, int size
)
533 struct xscale_common
*xscale
= target_to_xscale(target
);
539 xscale_jtag_set_instr(target
->tap
,
540 XSCALE_DBGRX
<< xscale
->xscale_variant
,
548 int endianness
= target
->endianness
;
549 while (done_count
++ < count
)
554 if (endianness
== TARGET_LITTLE_ENDIAN
)
556 t
[1]=le_to_h_u32(buffer
);
559 t
[1]=be_to_h_u32(buffer
);
563 if (endianness
== TARGET_LITTLE_ENDIAN
)
565 t
[1]=le_to_h_u16(buffer
);
568 t
[1]=be_to_h_u16(buffer
);
575 LOG_ERROR("BUG: size neither 4, 2 nor 1");
576 return ERROR_INVALID_ARGUMENTS
;
578 jtag_add_dr_out(target
->tap
,
586 if ((retval
= jtag_execute_queue()) != ERROR_OK
)
588 LOG_ERROR("JTAG error while sending data to debug handler");
595 static int xscale_send_u32(struct target
*target
, uint32_t value
)
597 struct xscale_common
*xscale
= target_to_xscale(target
);
599 buf_set_u32(xscale
->reg_cache
->reg_list
[XSCALE_RX
].value
, 0, 32, value
);
600 return xscale_write_rx(target
);
603 static int xscale_write_dcsr(struct target
*target
, int hold_rst
, int ext_dbg_brk
)
605 struct xscale_common
*xscale
= target_to_xscale(target
);
607 struct scan_field fields
[3];
608 uint8_t field0
= 0x0;
609 uint8_t field0_check_value
= 0x2;
610 uint8_t field0_check_mask
= 0x7;
611 uint8_t field2
= 0x0;
612 uint8_t field2_check_value
= 0x0;
613 uint8_t field2_check_mask
= 0x1;
616 xscale
->hold_rst
= hold_rst
;
618 if (ext_dbg_brk
!= -1)
619 xscale
->external_debug_break
= ext_dbg_brk
;
621 xscale_jtag_set_instr(target
->tap
,
622 XSCALE_SELDCSR
<< xscale
->xscale_variant
,
625 buf_set_u32(&field0
, 1, 1, xscale
->hold_rst
);
626 buf_set_u32(&field0
, 2, 1, xscale
->external_debug_break
);
628 memset(&fields
, 0, sizeof fields
);
630 fields
[0].num_bits
= 3;
631 fields
[0].out_value
= &field0
;
633 fields
[0].in_value
= &tmp
;
635 fields
[1].num_bits
= 32;
636 fields
[1].out_value
= xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].value
;
638 fields
[2].num_bits
= 1;
639 fields
[2].out_value
= &field2
;
641 fields
[2].in_value
= &tmp2
;
643 jtag_add_dr_scan(target
->tap
, 3, fields
, TAP_IDLE
);
645 jtag_check_value_mask(fields
+ 0, &field0_check_value
, &field0_check_mask
);
646 jtag_check_value_mask(fields
+ 2, &field2_check_value
, &field2_check_mask
);
648 if ((retval
= jtag_execute_queue()) != ERROR_OK
)
650 LOG_ERROR("JTAG error while writing DCSR");
654 xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].dirty
= 0;
655 xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].valid
= 1;
660 /* parity of the number of bits 0 if even; 1 if odd. for 32 bit words */
661 static unsigned int parity (unsigned int v
)
663 // unsigned int ov = v;
668 // LOG_DEBUG("parity of 0x%x is %i", ov, (0x6996 >> v) & 1);
669 return (0x6996 >> v
) & 1;
672 static int xscale_load_ic(struct target
*target
, uint32_t va
, uint32_t buffer
[8])
674 struct xscale_common
*xscale
= target_to_xscale(target
);
678 struct scan_field fields
[2];
680 LOG_DEBUG("loading miniIC at 0x%8.8" PRIx32
"", va
);
683 xscale_jtag_set_instr(target
->tap
,
684 XSCALE_LDIC
<< xscale
->xscale_variant
,
687 /* CMD is b011 to load a cacheline into the Mini ICache.
688 * Loading into the main ICache is deprecated, and unused.
689 * It's followed by three zero bits, and 27 address bits.
691 buf_set_u32(&cmd
, 0, 6, 0x3);
693 /* virtual address of desired cache line */
694 buf_set_u32(packet
, 0, 27, va
>> 5);
696 memset(&fields
, 0, sizeof fields
);
698 fields
[0].num_bits
= 6;
699 fields
[0].out_value
= &cmd
;
701 fields
[1].num_bits
= 27;
702 fields
[1].out_value
= packet
;
704 jtag_add_dr_scan(target
->tap
, 2, fields
, TAP_IDLE
);
706 /* rest of packet is a cacheline: 8 instructions, with parity */
707 fields
[0].num_bits
= 32;
708 fields
[0].out_value
= packet
;
710 fields
[1].num_bits
= 1;
711 fields
[1].out_value
= &cmd
;
713 for (word
= 0; word
< 8; word
++)
715 buf_set_u32(packet
, 0, 32, buffer
[word
]);
718 memcpy(&value
, packet
, sizeof(uint32_t));
721 jtag_add_dr_scan(target
->tap
, 2, fields
, TAP_IDLE
);
724 return jtag_execute_queue();
727 static int xscale_invalidate_ic_line(struct target
*target
, uint32_t va
)
729 struct xscale_common
*xscale
= target_to_xscale(target
);
732 struct scan_field fields
[2];
734 xscale_jtag_set_instr(target
->tap
,
735 XSCALE_LDIC
<< xscale
->xscale_variant
,
738 /* CMD for invalidate IC line b000, bits [6:4] b000 */
739 buf_set_u32(&cmd
, 0, 6, 0x0);
741 /* virtual address of desired cache line */
742 buf_set_u32(packet
, 0, 27, va
>> 5);
744 memset(&fields
, 0, sizeof fields
);
746 fields
[0].num_bits
= 6;
747 fields
[0].out_value
= &cmd
;
749 fields
[1].num_bits
= 27;
750 fields
[1].out_value
= packet
;
752 jtag_add_dr_scan(target
->tap
, 2, fields
, TAP_IDLE
);
757 static int xscale_update_vectors(struct target
*target
)
759 struct xscale_common
*xscale
= target_to_xscale(target
);
763 uint32_t low_reset_branch
, high_reset_branch
;
765 for (i
= 1; i
< 8; i
++)
767 /* if there's a static vector specified for this exception, override */
768 if (xscale
->static_high_vectors_set
& (1 << i
))
770 xscale
->high_vectors
[i
] = xscale
->static_high_vectors
[i
];
774 retval
= target_read_u32(target
, 0xffff0000 + 4*i
, &xscale
->high_vectors
[i
]);
775 if (retval
== ERROR_TARGET_TIMEOUT
)
777 if (retval
!= ERROR_OK
)
779 /* Some of these reads will fail as part of normal execution */
780 xscale
->high_vectors
[i
] = ARMV4_5_B(0xfffffe, 0);
785 for (i
= 1; i
< 8; i
++)
787 if (xscale
->static_low_vectors_set
& (1 << i
))
789 xscale
->low_vectors
[i
] = xscale
->static_low_vectors
[i
];
793 retval
= target_read_u32(target
, 0x0 + 4*i
, &xscale
->low_vectors
[i
]);
794 if (retval
== ERROR_TARGET_TIMEOUT
)
796 if (retval
!= ERROR_OK
)
798 /* Some of these reads will fail as part of normal execution */
799 xscale
->low_vectors
[i
] = ARMV4_5_B(0xfffffe, 0);
804 /* calculate branches to debug handler */
805 low_reset_branch
= (xscale
->handler_address
+ 0x20 - 0x0 - 0x8) >> 2;
806 high_reset_branch
= (xscale
->handler_address
+ 0x20 - 0xffff0000 - 0x8) >> 2;
808 xscale
->low_vectors
[0] = ARMV4_5_B((low_reset_branch
& 0xffffff), 0);
809 xscale
->high_vectors
[0] = ARMV4_5_B((high_reset_branch
& 0xffffff), 0);
811 /* invalidate and load exception vectors in mini i-cache */
812 xscale_invalidate_ic_line(target
, 0x0);
813 xscale_invalidate_ic_line(target
, 0xffff0000);
815 xscale_load_ic(target
, 0x0, xscale
->low_vectors
);
816 xscale_load_ic(target
, 0xffff0000, xscale
->high_vectors
);
821 static int xscale_arch_state(struct target
*target
)
823 struct xscale_common
*xscale
= target_to_xscale(target
);
824 struct arm
*armv4_5
= &xscale
->armv4_5_common
;
826 static const char *state
[] =
828 "disabled", "enabled"
831 static const char *arch_dbg_reason
[] =
833 "", "\n(processor reset)", "\n(trace buffer full)"
836 if (armv4_5
->common_magic
!= ARM_COMMON_MAGIC
)
838 LOG_ERROR("BUG: called for a non-ARMv4/5 target");
839 return ERROR_INVALID_ARGUMENTS
;
842 arm_arch_state(target
);
843 LOG_USER("MMU: %s, D-Cache: %s, I-Cache: %s%s",
844 state
[xscale
->armv4_5_mmu
.mmu_enabled
],
845 state
[xscale
->armv4_5_mmu
.armv4_5_cache
.d_u_cache_enabled
],
846 state
[xscale
->armv4_5_mmu
.armv4_5_cache
.i_cache_enabled
],
847 arch_dbg_reason
[xscale
->arch_debug_reason
]);
852 static int xscale_poll(struct target
*target
)
854 int retval
= ERROR_OK
;
856 if ((target
->state
== TARGET_RUNNING
) || (target
->state
== TARGET_DEBUG_RUNNING
))
858 enum target_state previous_state
= target
->state
;
859 if ((retval
= xscale_read_tx(target
, 0)) == ERROR_OK
)
862 /* there's data to read from the tx register, we entered debug state */
863 target
->state
= TARGET_HALTED
;
865 /* process debug entry, fetching current mode regs */
866 retval
= xscale_debug_entry(target
);
868 else if (retval
!= ERROR_TARGET_RESOURCE_NOT_AVAILABLE
)
870 LOG_USER("error while polling TX register, reset CPU");
871 /* here we "lie" so GDB won't get stuck and a reset can be perfomed */
872 target
->state
= TARGET_HALTED
;
875 /* debug_entry could have overwritten target state (i.e. immediate resume)
876 * don't signal event handlers in that case
878 if (target
->state
!= TARGET_HALTED
)
881 /* if target was running, signal that we halted
882 * otherwise we reentered from debug execution */
883 if (previous_state
== TARGET_RUNNING
)
884 target_call_event_callbacks(target
, TARGET_EVENT_HALTED
);
886 target_call_event_callbacks(target
, TARGET_EVENT_DEBUG_HALTED
);
892 static int xscale_debug_entry(struct target
*target
)
894 struct xscale_common
*xscale
= target_to_xscale(target
);
895 struct arm
*armv4_5
= &xscale
->armv4_5_common
;
902 /* clear external dbg break (will be written on next DCSR read) */
903 xscale
->external_debug_break
= 0;
904 if ((retval
= xscale_read_dcsr(target
)) != ERROR_OK
)
907 /* get r0, pc, r1 to r7 and cpsr */
908 if ((retval
= xscale_receive(target
, buffer
, 10)) != ERROR_OK
)
911 /* move r0 from buffer to register cache */
912 buf_set_u32(armv4_5
->core_cache
->reg_list
[0].value
, 0, 32, buffer
[0]);
913 armv4_5
->core_cache
->reg_list
[0].dirty
= 1;
914 armv4_5
->core_cache
->reg_list
[0].valid
= 1;
915 LOG_DEBUG("r0: 0x%8.8" PRIx32
"", buffer
[0]);
917 /* move pc from buffer to register cache */
918 buf_set_u32(armv4_5
->pc
->value
, 0, 32, buffer
[1]);
919 armv4_5
->pc
->dirty
= 1;
920 armv4_5
->pc
->valid
= 1;
921 LOG_DEBUG("pc: 0x%8.8" PRIx32
"", buffer
[1]);
923 /* move data from buffer to register cache */
924 for (i
= 1; i
<= 7; i
++)
926 buf_set_u32(armv4_5
->core_cache
->reg_list
[i
].value
, 0, 32, buffer
[1 + i
]);
927 armv4_5
->core_cache
->reg_list
[i
].dirty
= 1;
928 armv4_5
->core_cache
->reg_list
[i
].valid
= 1;
929 LOG_DEBUG("r%i: 0x%8.8" PRIx32
"", i
, buffer
[i
+ 1]);
932 arm_set_cpsr(armv4_5
, buffer
[9]);
933 LOG_DEBUG("cpsr: 0x%8.8" PRIx32
"", buffer
[9]);
935 if (!is_arm_mode(armv4_5
->core_mode
))
937 target
->state
= TARGET_UNKNOWN
;
938 LOG_ERROR("cpsr contains invalid mode value - communication failure");
939 return ERROR_TARGET_FAILURE
;
941 LOG_DEBUG("target entered debug state in %s mode",
942 arm_mode_name(armv4_5
->core_mode
));
944 /* get banked registers, r8 to r14, and spsr if not in USR/SYS mode */
946 xscale_receive(target
, buffer
, 8);
947 buf_set_u32(armv4_5
->spsr
->value
, 0, 32, buffer
[7]);
948 armv4_5
->spsr
->dirty
= false;
949 armv4_5
->spsr
->valid
= true;
953 /* r8 to r14, but no spsr */
954 xscale_receive(target
, buffer
, 7);
957 /* move data from buffer to right banked register in cache */
958 for (i
= 8; i
<= 14; i
++)
960 struct reg
*r
= arm_reg_current(armv4_5
, i
);
962 buf_set_u32(r
->value
, 0, 32, buffer
[i
- 8]);
967 /* mark xscale regs invalid to ensure they are retrieved from the
968 * debug handler if requested */
969 for (i
= 0; i
< xscale
->reg_cache
->num_regs
; i
++)
970 xscale
->reg_cache
->reg_list
[i
].valid
= 0;
972 /* examine debug reason */
973 xscale_read_dcsr(target
);
974 moe
= buf_get_u32(xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].value
, 2, 3);
976 /* stored PC (for calculating fixup) */
977 pc
= buf_get_u32(armv4_5
->pc
->value
, 0, 32);
981 case 0x0: /* Processor reset */
982 target
->debug_reason
= DBG_REASON_DBGRQ
;
983 xscale
->arch_debug_reason
= XSCALE_DBG_REASON_RESET
;
986 case 0x1: /* Instruction breakpoint hit */
987 target
->debug_reason
= DBG_REASON_BREAKPOINT
;
988 xscale
->arch_debug_reason
= XSCALE_DBG_REASON_GENERIC
;
991 case 0x2: /* Data breakpoint hit */
992 target
->debug_reason
= DBG_REASON_WATCHPOINT
;
993 xscale
->arch_debug_reason
= XSCALE_DBG_REASON_GENERIC
;
996 case 0x3: /* BKPT instruction executed */
997 target
->debug_reason
= DBG_REASON_BREAKPOINT
;
998 xscale
->arch_debug_reason
= XSCALE_DBG_REASON_GENERIC
;
1001 case 0x4: /* Ext. debug event */
1002 target
->debug_reason
= DBG_REASON_DBGRQ
;
1003 xscale
->arch_debug_reason
= XSCALE_DBG_REASON_GENERIC
;
1006 case 0x5: /* Vector trap occured */
1007 target
->debug_reason
= DBG_REASON_BREAKPOINT
;
1008 xscale
->arch_debug_reason
= XSCALE_DBG_REASON_GENERIC
;
1011 case 0x6: /* Trace buffer full break */
1012 target
->debug_reason
= DBG_REASON_DBGRQ
;
1013 xscale
->arch_debug_reason
= XSCALE_DBG_REASON_TB_FULL
;
1016 case 0x7: /* Reserved (may flag Hot-Debug support) */
1018 LOG_ERROR("Method of Entry is 'Reserved'");
1023 /* apply PC fixup */
1024 buf_set_u32(armv4_5
->pc
->value
, 0, 32, pc
);
1026 /* on the first debug entry, identify cache type */
1027 if (xscale
->armv4_5_mmu
.armv4_5_cache
.ctype
== -1)
1029 uint32_t cache_type_reg
;
1031 /* read cp15 cache type register */
1032 xscale_get_reg(&xscale
->reg_cache
->reg_list
[XSCALE_CACHETYPE
]);
1033 cache_type_reg
= buf_get_u32(xscale
->reg_cache
->reg_list
[XSCALE_CACHETYPE
].value
, 0, 32);
1035 armv4_5_identify_cache(cache_type_reg
, &xscale
->armv4_5_mmu
.armv4_5_cache
);
1038 /* examine MMU and Cache settings */
1039 /* read cp15 control register */
1040 xscale_get_reg(&xscale
->reg_cache
->reg_list
[XSCALE_CTRL
]);
1041 xscale
->cp15_control_reg
= buf_get_u32(xscale
->reg_cache
->reg_list
[XSCALE_CTRL
].value
, 0, 32);
1042 xscale
->armv4_5_mmu
.mmu_enabled
= (xscale
->cp15_control_reg
& 0x1U
) ? 1 : 0;
1043 xscale
->armv4_5_mmu
.armv4_5_cache
.d_u_cache_enabled
= (xscale
->cp15_control_reg
& 0x4U
) ? 1 : 0;
1044 xscale
->armv4_5_mmu
.armv4_5_cache
.i_cache_enabled
= (xscale
->cp15_control_reg
& 0x1000U
) ? 1 : 0;
1046 /* tracing enabled, read collected trace data */
1047 if (xscale
->trace
.buffer_enabled
)
1049 xscale_read_trace(target
);
1050 xscale
->trace
.buffer_fill
--;
1052 /* resume if we're still collecting trace data */
1053 if ((xscale
->arch_debug_reason
== XSCALE_DBG_REASON_TB_FULL
)
1054 && (xscale
->trace
.buffer_fill
> 0))
1056 xscale_resume(target
, 1, 0x0, 1, 0);
1060 xscale
->trace
.buffer_enabled
= 0;
1067 static int xscale_halt(struct target
*target
)
1069 struct xscale_common
*xscale
= target_to_xscale(target
);
1071 LOG_DEBUG("target->state: %s",
1072 target_state_name(target
));
1074 if (target
->state
== TARGET_HALTED
)
1076 LOG_DEBUG("target was already halted");
1079 else if (target
->state
== TARGET_UNKNOWN
)
1081 /* this must not happen for a xscale target */
1082 LOG_ERROR("target was in unknown state when halt was requested");
1083 return ERROR_TARGET_INVALID
;
1085 else if (target
->state
== TARGET_RESET
)
1087 LOG_DEBUG("target->state == TARGET_RESET");
1091 /* assert external dbg break */
1092 xscale
->external_debug_break
= 1;
1093 xscale_read_dcsr(target
);
1095 target
->debug_reason
= DBG_REASON_DBGRQ
;
1101 static int xscale_enable_single_step(struct target
*target
, uint32_t next_pc
)
1103 struct xscale_common
*xscale
= target_to_xscale(target
);
1104 struct reg
*ibcr0
= &xscale
->reg_cache
->reg_list
[XSCALE_IBCR0
];
1107 if (xscale
->ibcr0_used
)
1109 struct breakpoint
*ibcr0_bp
= breakpoint_find(target
, buf_get_u32(ibcr0
->value
, 0, 32) & 0xfffffffe);
1113 xscale_unset_breakpoint(target
, ibcr0_bp
);
1117 LOG_ERROR("BUG: xscale->ibcr0_used is set, but no breakpoint with that address found");
1122 if ((retval
= xscale_set_reg_u32(ibcr0
, next_pc
| 0x1)) != ERROR_OK
)
1128 static int xscale_disable_single_step(struct target
*target
)
1130 struct xscale_common
*xscale
= target_to_xscale(target
);
1131 struct reg
*ibcr0
= &xscale
->reg_cache
->reg_list
[XSCALE_IBCR0
];
1134 if ((retval
= xscale_set_reg_u32(ibcr0
, 0x0)) != ERROR_OK
)
1140 static void xscale_enable_watchpoints(struct target
*target
)
1142 struct watchpoint
*watchpoint
= target
->watchpoints
;
1146 if (watchpoint
->set
== 0)
1147 xscale_set_watchpoint(target
, watchpoint
);
1148 watchpoint
= watchpoint
->next
;
1152 static void xscale_enable_breakpoints(struct target
*target
)
1154 struct breakpoint
*breakpoint
= target
->breakpoints
;
1156 /* set any pending breakpoints */
1159 if (breakpoint
->set
== 0)
1160 xscale_set_breakpoint(target
, breakpoint
);
1161 breakpoint
= breakpoint
->next
;
1165 static int xscale_resume(struct target
*target
, int current
,
1166 uint32_t address
, int handle_breakpoints
, int debug_execution
)
1168 struct xscale_common
*xscale
= target_to_xscale(target
);
1169 struct arm
*armv4_5
= &xscale
->armv4_5_common
;
1170 struct breakpoint
*breakpoint
= target
->breakpoints
;
1171 uint32_t current_pc
;
1177 if (target
->state
!= TARGET_HALTED
)
1179 LOG_WARNING("target not halted");
1180 return ERROR_TARGET_NOT_HALTED
;
1183 if (!debug_execution
)
1185 target_free_all_working_areas(target
);
1188 /* update vector tables */
1189 if ((retval
= xscale_update_vectors(target
)) != ERROR_OK
)
1192 /* current = 1: continue on current pc, otherwise continue at <address> */
1194 buf_set_u32(armv4_5
->pc
->value
, 0, 32, address
);
1196 current_pc
= buf_get_u32(armv4_5
->pc
->value
, 0, 32);
1198 /* if we're at the reset vector, we have to simulate the branch */
1199 if (current_pc
== 0x0)
1201 arm_simulate_step(target
, NULL
);
1202 current_pc
= buf_get_u32(armv4_5
->pc
->value
, 0, 32);
1205 /* the front-end may request us not to handle breakpoints */
1206 if (handle_breakpoints
)
1208 breakpoint
= breakpoint_find(target
,
1209 buf_get_u32(armv4_5
->pc
->value
, 0, 32));
1210 if (breakpoint
!= NULL
)
1213 int saved_trace_buffer_enabled
;
1215 /* there's a breakpoint at the current PC, we have to step over it */
1216 LOG_DEBUG("unset breakpoint at 0x%8.8" PRIx32
"", breakpoint
->address
);
1217 xscale_unset_breakpoint(target
, breakpoint
);
1219 /* calculate PC of next instruction */
1220 if ((retval
= arm_simulate_step(target
, &next_pc
)) != ERROR_OK
)
1222 uint32_t current_opcode
;
1223 target_read_u32(target
, current_pc
, ¤t_opcode
);
1224 LOG_ERROR("BUG: couldn't calculate PC of next instruction, current opcode was 0x%8.8" PRIx32
"", current_opcode
);
1227 LOG_DEBUG("enable single-step");
1228 xscale_enable_single_step(target
, next_pc
);
1230 /* restore banked registers */
1231 retval
= xscale_restore_banked(target
);
1233 /* send resume request */
1234 xscale_send_u32(target
, 0x30);
1237 xscale_send_u32(target
,
1238 buf_get_u32(armv4_5
->cpsr
->value
, 0, 32));
1239 LOG_DEBUG("writing cpsr with value 0x%8.8" PRIx32
,
1240 buf_get_u32(armv4_5
->cpsr
->value
, 0, 32));
1242 for (i
= 7; i
>= 0; i
--)
1245 xscale_send_u32(target
, buf_get_u32(armv4_5
->core_cache
->reg_list
[i
].value
, 0, 32));
1246 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));
1250 xscale_send_u32(target
,
1251 buf_get_u32(armv4_5
->pc
->value
, 0, 32));
1252 LOG_DEBUG("writing PC with value 0x%8.8" PRIx32
,
1253 buf_get_u32(armv4_5
->pc
->value
, 0, 32));
1255 /* disable trace data collection in xscale_debug_entry() */
1256 saved_trace_buffer_enabled
= xscale
->trace
.buffer_enabled
;
1257 xscale
->trace
.buffer_enabled
= 0;
1259 /* wait for and process debug entry */
1260 xscale_debug_entry(target
);
1262 /* re-enable trace buffer, if enabled previously */
1263 xscale
->trace
.buffer_enabled
= saved_trace_buffer_enabled
;
1265 LOG_DEBUG("disable single-step");
1266 xscale_disable_single_step(target
);
1268 LOG_DEBUG("set breakpoint at 0x%8.8" PRIx32
"", breakpoint
->address
);
1269 xscale_set_breakpoint(target
, breakpoint
);
1273 /* enable any pending breakpoints and watchpoints */
1274 xscale_enable_breakpoints(target
);
1275 xscale_enable_watchpoints(target
);
1277 /* restore banked registers */
1278 retval
= xscale_restore_banked(target
);
1280 /* send resume request (command 0x30 or 0x31)
1281 * clean the trace buffer if it is to be enabled (0x62) */
1282 if (xscale
->trace
.buffer_enabled
)
1284 xscale_send_u32(target
, 0x62);
1285 xscale_send_u32(target
, 0x31);
1288 xscale_send_u32(target
, 0x30);
1291 xscale_send_u32(target
, buf_get_u32(armv4_5
->cpsr
->value
, 0, 32));
1292 LOG_DEBUG("writing cpsr with value 0x%8.8" PRIx32
,
1293 buf_get_u32(armv4_5
->cpsr
->value
, 0, 32));
1295 for (i
= 7; i
>= 0; i
--)
1298 xscale_send_u32(target
, buf_get_u32(armv4_5
->core_cache
->reg_list
[i
].value
, 0, 32));
1299 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));
1303 xscale_send_u32(target
, buf_get_u32(armv4_5
->pc
->value
, 0, 32));
1304 LOG_DEBUG("wrote PC with value 0x%8.8" PRIx32
,
1305 buf_get_u32(armv4_5
->pc
->value
, 0, 32));
1307 target
->debug_reason
= DBG_REASON_NOTHALTED
;
1309 if (!debug_execution
)
1311 /* registers are now invalid */
1312 register_cache_invalidate(armv4_5
->core_cache
);
1313 target
->state
= TARGET_RUNNING
;
1314 target_call_event_callbacks(target
, TARGET_EVENT_RESUMED
);
1318 target
->state
= TARGET_DEBUG_RUNNING
;
1319 target_call_event_callbacks(target
, TARGET_EVENT_DEBUG_RESUMED
);
1322 LOG_DEBUG("target resumed");
1327 static int xscale_step_inner(struct target
*target
, int current
,
1328 uint32_t address
, int handle_breakpoints
)
1330 struct xscale_common
*xscale
= target_to_xscale(target
);
1331 struct arm
*armv4_5
= &xscale
->armv4_5_common
;
1336 target
->debug_reason
= DBG_REASON_SINGLESTEP
;
1338 /* calculate PC of next instruction */
1339 if ((retval
= arm_simulate_step(target
, &next_pc
)) != ERROR_OK
)
1341 uint32_t current_opcode
, current_pc
;
1342 current_pc
= buf_get_u32(armv4_5
->pc
->value
, 0, 32);
1344 target_read_u32(target
, current_pc
, ¤t_opcode
);
1345 LOG_ERROR("BUG: couldn't calculate PC of next instruction, current opcode was 0x%8.8" PRIx32
"", current_opcode
);
1349 LOG_DEBUG("enable single-step");
1350 if ((retval
= xscale_enable_single_step(target
, next_pc
)) != ERROR_OK
)
1353 /* restore banked registers */
1354 if ((retval
= xscale_restore_banked(target
)) != ERROR_OK
)
1357 /* send resume request (command 0x30 or 0x31)
1358 * clean the trace buffer if it is to be enabled (0x62) */
1359 if (xscale
->trace
.buffer_enabled
)
1361 if ((retval
= xscale_send_u32(target
, 0x62)) != ERROR_OK
)
1363 if ((retval
= xscale_send_u32(target
, 0x31)) != ERROR_OK
)
1367 if ((retval
= xscale_send_u32(target
, 0x30)) != ERROR_OK
)
1371 retval
= xscale_send_u32(target
,
1372 buf_get_u32(armv4_5
->cpsr
->value
, 0, 32));
1373 if (retval
!= ERROR_OK
)
1375 LOG_DEBUG("writing cpsr with value 0x%8.8" PRIx32
,
1376 buf_get_u32(armv4_5
->cpsr
->value
, 0, 32));
1378 for (i
= 7; i
>= 0; i
--)
1381 if ((retval
= xscale_send_u32(target
, buf_get_u32(armv4_5
->core_cache
->reg_list
[i
].value
, 0, 32))) != ERROR_OK
)
1383 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));
1387 retval
= xscale_send_u32(target
,
1388 buf_get_u32(armv4_5
->pc
->value
, 0, 32));
1389 if (retval
!= ERROR_OK
)
1391 LOG_DEBUG("wrote PC with value 0x%8.8" PRIx32
,
1392 buf_get_u32(armv4_5
->pc
->value
, 0, 32));
1394 target_call_event_callbacks(target
, TARGET_EVENT_RESUMED
);
1396 /* registers are now invalid */
1397 register_cache_invalidate(armv4_5
->core_cache
);
1399 /* wait for and process debug entry */
1400 if ((retval
= xscale_debug_entry(target
)) != ERROR_OK
)
1403 LOG_DEBUG("disable single-step");
1404 if ((retval
= xscale_disable_single_step(target
)) != ERROR_OK
)
1407 target_call_event_callbacks(target
, TARGET_EVENT_HALTED
);
1412 static int xscale_step(struct target
*target
, int current
,
1413 uint32_t address
, int handle_breakpoints
)
1415 struct arm
*armv4_5
= target_to_arm(target
);
1416 struct breakpoint
*breakpoint
= NULL
;
1418 uint32_t current_pc
;
1421 if (target
->state
!= TARGET_HALTED
)
1423 LOG_WARNING("target not halted");
1424 return ERROR_TARGET_NOT_HALTED
;
1427 /* current = 1: continue on current pc, otherwise continue at <address> */
1429 buf_set_u32(armv4_5
->pc
->value
, 0, 32, address
);
1431 current_pc
= buf_get_u32(armv4_5
->pc
->value
, 0, 32);
1433 /* if we're at the reset vector, we have to simulate the step */
1434 if (current_pc
== 0x0)
1436 if ((retval
= arm_simulate_step(target
, NULL
)) != ERROR_OK
)
1438 current_pc
= buf_get_u32(armv4_5
->pc
->value
, 0, 32);
1440 target
->debug_reason
= DBG_REASON_SINGLESTEP
;
1441 target_call_event_callbacks(target
, TARGET_EVENT_HALTED
);
1446 /* the front-end may request us not to handle breakpoints */
1447 if (handle_breakpoints
)
1448 breakpoint
= breakpoint_find(target
,
1449 buf_get_u32(armv4_5
->pc
->value
, 0, 32));
1450 if (breakpoint
!= NULL
) {
1451 retval
= xscale_unset_breakpoint(target
, breakpoint
);
1452 if (retval
!= ERROR_OK
)
1456 retval
= xscale_step_inner(target
, current
, address
, handle_breakpoints
);
1460 xscale_set_breakpoint(target
, breakpoint
);
1463 LOG_DEBUG("target stepped");
1469 static int xscale_assert_reset(struct target
*target
)
1471 struct xscale_common
*xscale
= target_to_xscale(target
);
1473 LOG_DEBUG("target->state: %s",
1474 target_state_name(target
));
1476 /* select DCSR instruction (set endstate to R-T-I to ensure we don't
1477 * end up in T-L-R, which would reset JTAG
1479 xscale_jtag_set_instr(target
->tap
,
1480 XSCALE_SELDCSR
<< xscale
->xscale_variant
,
1483 /* set Hold reset, Halt mode and Trap Reset */
1484 buf_set_u32(xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].value
, 30, 1, 0x1);
1485 buf_set_u32(xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].value
, 16, 1, 0x1);
1486 xscale_write_dcsr(target
, 1, 0);
1488 /* select BYPASS, because having DCSR selected caused problems on the PXA27x */
1489 xscale_jtag_set_instr(target
->tap
, ~0, TAP_IDLE
);
1490 jtag_execute_queue();
1493 jtag_add_reset(0, 1);
1495 /* sleep 1ms, to be sure we fulfill any requirements */
1496 jtag_add_sleep(1000);
1497 jtag_execute_queue();
1499 target
->state
= TARGET_RESET
;
1501 if (target
->reset_halt
)
1504 if ((retval
= target_halt(target
)) != ERROR_OK
)
1511 static int xscale_deassert_reset(struct target
*target
)
1513 struct xscale_common
*xscale
= target_to_xscale(target
);
1514 struct breakpoint
*breakpoint
= target
->breakpoints
;
1518 xscale
->ibcr_available
= 2;
1519 xscale
->ibcr0_used
= 0;
1520 xscale
->ibcr1_used
= 0;
1522 xscale
->dbr_available
= 2;
1523 xscale
->dbr0_used
= 0;
1524 xscale
->dbr1_used
= 0;
1526 /* mark all hardware breakpoints as unset */
1529 if (breakpoint
->type
== BKPT_HARD
)
1531 breakpoint
->set
= 0;
1533 breakpoint
= breakpoint
->next
;
1536 register_cache_invalidate(xscale
->armv4_5_common
.core_cache
);
1538 /* FIXME mark hardware watchpoints got unset too. Also,
1539 * at least some of the XScale registers are invalid...
1543 * REVISIT: *assumes* we had a SRST+TRST reset so the mini-icache
1544 * contents got invalidated. Safer to force that, so writing new
1545 * contents can't ever fail..
1550 const uint8_t *buffer
= xscale_debug_handler
;
1554 jtag_add_reset(0, 0);
1556 /* wait 300ms; 150 and 100ms were not enough */
1557 jtag_add_sleep(300*1000);
1559 jtag_add_runtest(2030, TAP_IDLE
);
1560 jtag_execute_queue();
1562 /* set Hold reset, Halt mode and Trap Reset */
1563 buf_set_u32(xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].value
, 30, 1, 0x1);
1564 buf_set_u32(xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].value
, 16, 1, 0x1);
1565 xscale_write_dcsr(target
, 1, 0);
1567 /* Load the debug handler into the mini-icache. Since
1568 * it's using halt mode (not monitor mode), it runs in
1569 * "Special Debug State" for access to registers, memory,
1570 * coprocessors, trace data, etc.
1572 address
= xscale
->handler_address
;
1573 for (unsigned binary_size
= sizeof xscale_debug_handler
- 1;
1575 binary_size
-= buf_cnt
, buffer
+= buf_cnt
)
1577 uint32_t cache_line
[8];
1580 buf_cnt
= binary_size
;
1584 for (i
= 0; i
< buf_cnt
; i
+= 4)
1586 /* convert LE buffer to host-endian uint32_t */
1587 cache_line
[i
/ 4] = le_to_h_u32(&buffer
[i
]);
1590 for (; i
< 32; i
+= 4)
1592 cache_line
[i
/ 4] = 0xe1a08008;
1595 /* only load addresses other than the reset vectors */
1596 if ((address
% 0x400) != 0x0)
1598 retval
= xscale_load_ic(target
, address
,
1600 if (retval
!= ERROR_OK
)
1607 retval
= xscale_load_ic(target
, 0x0,
1608 xscale
->low_vectors
);
1609 if (retval
!= ERROR_OK
)
1611 retval
= xscale_load_ic(target
, 0xffff0000,
1612 xscale
->high_vectors
);
1613 if (retval
!= ERROR_OK
)
1616 jtag_add_runtest(30, TAP_IDLE
);
1618 jtag_add_sleep(100000);
1620 /* set Hold reset, Halt mode and Trap Reset */
1621 buf_set_u32(xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].value
, 30, 1, 0x1);
1622 buf_set_u32(xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].value
, 16, 1, 0x1);
1623 xscale_write_dcsr(target
, 1, 0);
1625 /* clear Hold reset to let the target run (should enter debug handler) */
1626 xscale_write_dcsr(target
, 0, 1);
1627 target
->state
= TARGET_RUNNING
;
1629 if (!target
->reset_halt
)
1631 jtag_add_sleep(10000);
1633 /* we should have entered debug now */
1634 xscale_debug_entry(target
);
1635 target
->state
= TARGET_HALTED
;
1637 /* resume the target */
1638 xscale_resume(target
, 1, 0x0, 1, 0);
1645 static int xscale_read_core_reg(struct target
*target
, struct reg
*r
,
1646 int num
, enum arm_mode mode
)
1648 /** \todo add debug handler support for core register reads */
1649 LOG_ERROR("not implemented");
1653 static int xscale_write_core_reg(struct target
*target
, struct reg
*r
,
1654 int num
, enum arm_mode mode
, uint32_t value
)
1656 /** \todo add debug handler support for core register writes */
1657 LOG_ERROR("not implemented");
1661 static int xscale_full_context(struct target
*target
)
1663 struct arm
*armv4_5
= target_to_arm(target
);
1671 if (target
->state
!= TARGET_HALTED
)
1673 LOG_WARNING("target not halted");
1674 return ERROR_TARGET_NOT_HALTED
;
1677 buffer
= malloc(4 * 8);
1679 /* iterate through processor modes (FIQ, IRQ, SVC, ABT, UND and SYS)
1680 * we can't enter User mode on an XScale (unpredictable),
1681 * but User shares registers with SYS
1683 for (i
= 1; i
< 7; i
++)
1685 enum arm_mode mode
= armv4_5_number_to_mode(i
);
1689 if (mode
== ARM_MODE_USR
)
1692 /* check if there are invalid registers in the current mode
1694 for (j
= 0; valid
&& j
<= 16; j
++)
1696 if (!ARMV4_5_CORE_REG_MODE(armv4_5
->core_cache
,
1703 /* request banked registers */
1704 xscale_send_u32(target
, 0x0);
1706 /* send CPSR for desired bank mode */
1707 xscale_send_u32(target
, mode
| 0xc0 /* I/F bits */);
1709 /* get banked registers: r8 to r14; and SPSR
1710 * except in USR/SYS mode
1712 if (mode
!= ARM_MODE_SYS
) {
1714 r
= &ARMV4_5_CORE_REG_MODE(armv4_5
->core_cache
,
1717 xscale_receive(target
, buffer
, 8);
1719 buf_set_u32(r
->value
, 0, 32, buffer
[7]);
1723 xscale_receive(target
, buffer
, 7);
1726 /* move data from buffer to register cache */
1727 for (j
= 8; j
<= 14; j
++)
1729 r
= &ARMV4_5_CORE_REG_MODE(armv4_5
->core_cache
,
1732 buf_set_u32(r
->value
, 0, 32, buffer
[j
- 8]);
1743 static int xscale_restore_banked(struct target
*target
)
1745 struct arm
*armv4_5
= target_to_arm(target
);
1749 if (target
->state
!= TARGET_HALTED
)
1751 LOG_WARNING("target not halted");
1752 return ERROR_TARGET_NOT_HALTED
;
1755 /* iterate through processor modes (FIQ, IRQ, SVC, ABT, UND and SYS)
1756 * and check if any banked registers need to be written. Ignore
1757 * USR mode (number 0) in favor of SYS; we can't enter User mode on
1758 * an XScale (unpredictable), but they share all registers.
1760 for (i
= 1; i
< 7; i
++)
1762 enum arm_mode mode
= armv4_5_number_to_mode(i
);
1765 if (mode
== ARM_MODE_USR
)
1768 /* check if there are dirty registers in this mode */
1769 for (j
= 8; j
<= 14; j
++)
1771 if (ARMV4_5_CORE_REG_MODE(armv4_5
->core_cache
,
1776 /* if not USR/SYS, check if the SPSR needs to be written */
1777 if (mode
!= ARM_MODE_SYS
)
1779 if (ARMV4_5_CORE_REG_MODE(armv4_5
->core_cache
,
1784 /* there's nothing to flush for this mode */
1788 /* command 0x1: "send banked registers" */
1789 xscale_send_u32(target
, 0x1);
1791 /* send CPSR for desired mode */
1792 xscale_send_u32(target
, mode
| 0xc0 /* I/F bits */);
1794 /* send r8 to r14/lr ... only FIQ needs more than r13..r14,
1795 * but this protocol doesn't understand that nuance.
1797 for (j
= 8; j
<= 14; j
++) {
1798 r
= &ARMV4_5_CORE_REG_MODE(armv4_5
->core_cache
,
1800 xscale_send_u32(target
, buf_get_u32(r
->value
, 0, 32));
1804 /* send spsr if not in USR/SYS mode */
1805 if (mode
!= ARM_MODE_SYS
) {
1806 r
= &ARMV4_5_CORE_REG_MODE(armv4_5
->core_cache
,
1808 xscale_send_u32(target
, buf_get_u32(r
->value
, 0, 32));
1816 static int xscale_read_memory(struct target
*target
, uint32_t address
,
1817 uint32_t size
, uint32_t count
, uint8_t *buffer
)
1819 struct xscale_common
*xscale
= target_to_xscale(target
);
1824 LOG_DEBUG("address: 0x%8.8" PRIx32
", size: 0x%8.8" PRIx32
", count: 0x%8.8" PRIx32
, address
, size
, count
);
1826 if (target
->state
!= TARGET_HALTED
)
1828 LOG_WARNING("target not halted");
1829 return ERROR_TARGET_NOT_HALTED
;
1832 /* sanitize arguments */
1833 if (((size
!= 4) && (size
!= 2) && (size
!= 1)) || (count
== 0) || !(buffer
))
1834 return ERROR_INVALID_ARGUMENTS
;
1836 if (((size
== 4) && (address
& 0x3u
)) || ((size
== 2) && (address
& 0x1u
)))
1837 return ERROR_TARGET_UNALIGNED_ACCESS
;
1839 /* send memory read request (command 0x1n, n: access size) */
1840 if ((retval
= xscale_send_u32(target
, 0x10 | size
)) != ERROR_OK
)
1843 /* send base address for read request */
1844 if ((retval
= xscale_send_u32(target
, address
)) != ERROR_OK
)
1847 /* send number of requested data words */
1848 if ((retval
= xscale_send_u32(target
, count
)) != ERROR_OK
)
1851 /* receive data from target (count times 32-bit words in host endianness) */
1852 buf32
= malloc(4 * count
);
1853 if ((retval
= xscale_receive(target
, buf32
, count
)) != ERROR_OK
)
1856 /* extract data from host-endian buffer into byte stream */
1857 for (i
= 0; i
< count
; i
++)
1862 target_buffer_set_u32(target
, buffer
, buf32
[i
]);
1866 target_buffer_set_u16(target
, buffer
, buf32
[i
] & 0xffff);
1870 *buffer
++ = buf32
[i
] & 0xff;
1873 LOG_ERROR("invalid read size");
1874 return ERROR_INVALID_ARGUMENTS
;
1880 /* examine DCSR, to see if Sticky Abort (SA) got set */
1881 if ((retval
= xscale_read_dcsr(target
)) != ERROR_OK
)
1883 if (buf_get_u32(xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].value
, 5, 1) == 1)
1886 if ((retval
= xscale_send_u32(target
, 0x60)) != ERROR_OK
)
1889 return ERROR_TARGET_DATA_ABORT
;
1895 static int xscale_read_phys_memory(struct target
*target
, uint32_t address
,
1896 uint32_t size
, uint32_t count
, uint8_t *buffer
)
1898 struct xscale_common
*xscale
= target_to_xscale(target
);
1900 /* with MMU inactive, there are only physical addresses */
1901 if (!xscale
->armv4_5_mmu
.mmu_enabled
)
1902 return xscale_read_memory(target
, address
, size
, count
, buffer
);
1904 /** \todo: provide a non-stub implementation of this routine. */
1905 LOG_ERROR("%s: %s is not implemented. Disable MMU?",
1906 target_name(target
), __func__
);
1910 static int xscale_write_memory(struct target
*target
, uint32_t address
,
1911 uint32_t size
, uint32_t count
, uint8_t *buffer
)
1913 struct xscale_common
*xscale
= target_to_xscale(target
);
1916 LOG_DEBUG("address: 0x%8.8" PRIx32
", size: 0x%8.8" PRIx32
", count: 0x%8.8" PRIx32
, address
, size
, count
);
1918 if (target
->state
!= TARGET_HALTED
)
1920 LOG_WARNING("target not halted");
1921 return ERROR_TARGET_NOT_HALTED
;
1924 /* sanitize arguments */
1925 if (((size
!= 4) && (size
!= 2) && (size
!= 1)) || (count
== 0) || !(buffer
))
1926 return ERROR_INVALID_ARGUMENTS
;
1928 if (((size
== 4) && (address
& 0x3u
)) || ((size
== 2) && (address
& 0x1u
)))
1929 return ERROR_TARGET_UNALIGNED_ACCESS
;
1931 /* send memory write request (command 0x2n, n: access size) */
1932 if ((retval
= xscale_send_u32(target
, 0x20 | size
)) != ERROR_OK
)
1935 /* send base address for read request */
1936 if ((retval
= xscale_send_u32(target
, address
)) != ERROR_OK
)
1939 /* send number of requested data words to be written*/
1940 if ((retval
= xscale_send_u32(target
, count
)) != ERROR_OK
)
1943 /* extract data from host-endian buffer into byte stream */
1945 for (i
= 0; i
< count
; i
++)
1950 value
= target_buffer_get_u32(target
, buffer
);
1951 xscale_send_u32(target
, value
);
1955 value
= target_buffer_get_u16(target
, buffer
);
1956 xscale_send_u32(target
, value
);
1961 xscale_send_u32(target
, value
);
1965 LOG_ERROR("should never get here");
1970 if ((retval
= xscale_send(target
, buffer
, count
, size
)) != ERROR_OK
)
1973 /* examine DCSR, to see if Sticky Abort (SA) got set */
1974 if ((retval
= xscale_read_dcsr(target
)) != ERROR_OK
)
1976 if (buf_get_u32(xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].value
, 5, 1) == 1)
1979 if ((retval
= xscale_send_u32(target
, 0x60)) != ERROR_OK
)
1982 LOG_ERROR("data abort writing memory");
1983 return ERROR_TARGET_DATA_ABORT
;
1989 static int xscale_write_phys_memory(struct target
*target
, uint32_t address
,
1990 uint32_t size
, uint32_t count
, uint8_t *buffer
)
1992 struct xscale_common
*xscale
= target_to_xscale(target
);
1994 /* with MMU inactive, there are only physical addresses */
1995 if (!xscale
->armv4_5_mmu
.mmu_enabled
)
1996 return xscale_read_memory(target
, address
, size
, count
, buffer
);
1998 /** \todo: provide a non-stub implementation of this routine. */
1999 LOG_ERROR("%s: %s is not implemented. Disable MMU?",
2000 target_name(target
), __func__
);
2004 static int xscale_bulk_write_memory(struct target
*target
, uint32_t address
,
2005 uint32_t count
, uint8_t *buffer
)
2007 return xscale_write_memory(target
, address
, 4, count
, buffer
);
2010 static int xscale_get_ttb(struct target
*target
, uint32_t *result
)
2012 struct xscale_common
*xscale
= target_to_xscale(target
);
2016 retval
= xscale_get_reg(&xscale
->reg_cache
->reg_list
[XSCALE_TTB
]);
2017 if (retval
!= ERROR_OK
)
2019 ttb
= buf_get_u32(xscale
->reg_cache
->reg_list
[XSCALE_TTB
].value
, 0, 32);
2026 static int xscale_disable_mmu_caches(struct target
*target
, int mmu
,
2027 int d_u_cache
, int i_cache
)
2029 struct xscale_common
*xscale
= target_to_xscale(target
);
2030 uint32_t cp15_control
;
2033 /* read cp15 control register */
2034 retval
= xscale_get_reg(&xscale
->reg_cache
->reg_list
[XSCALE_CTRL
]);
2035 if (retval
!=ERROR_OK
)
2037 cp15_control
= buf_get_u32(xscale
->reg_cache
->reg_list
[XSCALE_CTRL
].value
, 0, 32);
2040 cp15_control
&= ~0x1U
;
2045 retval
= xscale_send_u32(target
, 0x50);
2046 if (retval
!=ERROR_OK
)
2048 retval
= xscale_send_u32(target
, xscale
->cache_clean_address
);
2049 if (retval
!=ERROR_OK
)
2052 /* invalidate DCache */
2053 retval
= xscale_send_u32(target
, 0x51);
2054 if (retval
!=ERROR_OK
)
2057 cp15_control
&= ~0x4U
;
2062 /* invalidate ICache */
2063 retval
= xscale_send_u32(target
, 0x52);
2064 if (retval
!=ERROR_OK
)
2066 cp15_control
&= ~0x1000U
;
2069 /* write new cp15 control register */
2070 retval
= xscale_set_reg_u32(&xscale
->reg_cache
->reg_list
[XSCALE_CTRL
], cp15_control
);
2071 if (retval
!=ERROR_OK
)
2074 /* execute cpwait to ensure outstanding operations complete */
2075 retval
= xscale_send_u32(target
, 0x53);
2079 static int xscale_enable_mmu_caches(struct target
*target
, int mmu
,
2080 int d_u_cache
, int i_cache
)
2082 struct xscale_common
*xscale
= target_to_xscale(target
);
2083 uint32_t cp15_control
;
2086 /* read cp15 control register */
2087 retval
= xscale_get_reg(&xscale
->reg_cache
->reg_list
[XSCALE_CTRL
]);
2088 if (retval
!=ERROR_OK
)
2090 cp15_control
= buf_get_u32(xscale
->reg_cache
->reg_list
[XSCALE_CTRL
].value
, 0, 32);
2093 cp15_control
|= 0x1U
;
2096 cp15_control
|= 0x4U
;
2099 cp15_control
|= 0x1000U
;
2101 /* write new cp15 control register */
2102 retval
= xscale_set_reg_u32(&xscale
->reg_cache
->reg_list
[XSCALE_CTRL
], cp15_control
);
2103 if (retval
!=ERROR_OK
)
2106 /* execute cpwait to ensure outstanding operations complete */
2107 retval
= xscale_send_u32(target
, 0x53);
2111 static int xscale_set_breakpoint(struct target
*target
,
2112 struct breakpoint
*breakpoint
)
2115 struct xscale_common
*xscale
= target_to_xscale(target
);
2117 if (target
->state
!= TARGET_HALTED
)
2119 LOG_WARNING("target not halted");
2120 return ERROR_TARGET_NOT_HALTED
;
2123 if (breakpoint
->set
)
2125 LOG_WARNING("breakpoint already set");
2129 if (breakpoint
->type
== BKPT_HARD
)
2131 uint32_t value
= breakpoint
->address
| 1;
2132 if (!xscale
->ibcr0_used
)
2134 xscale_set_reg_u32(&xscale
->reg_cache
->reg_list
[XSCALE_IBCR0
], value
);
2135 xscale
->ibcr0_used
= 1;
2136 breakpoint
->set
= 1; /* breakpoint set on first breakpoint register */
2138 else if (!xscale
->ibcr1_used
)
2140 xscale_set_reg_u32(&xscale
->reg_cache
->reg_list
[XSCALE_IBCR1
], value
);
2141 xscale
->ibcr1_used
= 1;
2142 breakpoint
->set
= 2; /* breakpoint set on second breakpoint register */
2145 { /* bug: availability previously verified in xscale_add_breakpoint() */
2146 LOG_ERROR("BUG: no hardware comparator available");
2147 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
2150 else if (breakpoint
->type
== BKPT_SOFT
)
2152 if (breakpoint
->length
== 4)
2154 /* keep the original instruction in target endianness */
2155 if ((retval
= target_read_memory(target
, breakpoint
->address
, 4, 1, breakpoint
->orig_instr
)) != ERROR_OK
)
2159 /* write the bkpt instruction in target endianness (arm7_9->arm_bkpt is host endian) */
2160 if ((retval
= target_write_u32(target
, breakpoint
->address
, xscale
->arm_bkpt
)) != ERROR_OK
)
2167 /* keep the original instruction in target endianness */
2168 if ((retval
= target_read_memory(target
, breakpoint
->address
, 2, 1, breakpoint
->orig_instr
)) != ERROR_OK
)
2172 /* write the bkpt instruction in target endianness (arm7_9->arm_bkpt is host endian) */
2173 if ((retval
= target_write_u16(target
, breakpoint
->address
, xscale
->thumb_bkpt
)) != ERROR_OK
)
2178 breakpoint
->set
= 1;
2180 xscale_send_u32(target
, 0x50); /* clean dcache */
2181 xscale_send_u32(target
, xscale
->cache_clean_address
);
2182 xscale_send_u32(target
, 0x51); /* invalidate dcache */
2183 xscale_send_u32(target
, 0x52); /* invalidate icache and flush fetch buffers */
2189 static int xscale_add_breakpoint(struct target
*target
,
2190 struct breakpoint
*breakpoint
)
2192 struct xscale_common
*xscale
= target_to_xscale(target
);
2194 if ((breakpoint
->type
== BKPT_HARD
) && (xscale
->ibcr_available
< 1))
2196 LOG_INFO("no breakpoint unit available for hardware breakpoint");
2197 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
2200 if ((breakpoint
->length
!= 2) && (breakpoint
->length
!= 4))
2202 LOG_INFO("only breakpoints of two (Thumb) or four (ARM) bytes length supported");
2203 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
2206 if (breakpoint
->type
== BKPT_HARD
)
2208 xscale
->ibcr_available
--;
2211 return xscale_set_breakpoint(target
, breakpoint
);
2214 static int xscale_unset_breakpoint(struct target
*target
,
2215 struct breakpoint
*breakpoint
)
2218 struct xscale_common
*xscale
= target_to_xscale(target
);
2220 if (target
->state
!= TARGET_HALTED
)
2222 LOG_WARNING("target not halted");
2223 return ERROR_TARGET_NOT_HALTED
;
2226 if (!breakpoint
->set
)
2228 LOG_WARNING("breakpoint not set");
2232 if (breakpoint
->type
== BKPT_HARD
)
2234 if (breakpoint
->set
== 1)
2236 xscale_set_reg_u32(&xscale
->reg_cache
->reg_list
[XSCALE_IBCR0
], 0x0);
2237 xscale
->ibcr0_used
= 0;
2239 else if (breakpoint
->set
== 2)
2241 xscale_set_reg_u32(&xscale
->reg_cache
->reg_list
[XSCALE_IBCR1
], 0x0);
2242 xscale
->ibcr1_used
= 0;
2244 breakpoint
->set
= 0;
2248 /* restore original instruction (kept in target endianness) */
2249 if (breakpoint
->length
== 4)
2251 if ((retval
= target_write_memory(target
, breakpoint
->address
, 4, 1, breakpoint
->orig_instr
)) != ERROR_OK
)
2258 if ((retval
= target_write_memory(target
, breakpoint
->address
, 2, 1, breakpoint
->orig_instr
)) != ERROR_OK
)
2263 breakpoint
->set
= 0;
2265 xscale_send_u32(target
, 0x50); /* clean dcache */
2266 xscale_send_u32(target
, xscale
->cache_clean_address
);
2267 xscale_send_u32(target
, 0x51); /* invalidate dcache */
2268 xscale_send_u32(target
, 0x52); /* invalidate icache and flush fetch buffers */
2274 static int xscale_remove_breakpoint(struct target
*target
, struct breakpoint
*breakpoint
)
2276 struct xscale_common
*xscale
= target_to_xscale(target
);
2278 if (target
->state
!= TARGET_HALTED
)
2280 LOG_WARNING("target not halted");
2281 return ERROR_TARGET_NOT_HALTED
;
2284 if (breakpoint
->set
)
2286 xscale_unset_breakpoint(target
, breakpoint
);
2289 if (breakpoint
->type
== BKPT_HARD
)
2290 xscale
->ibcr_available
++;
2295 static int xscale_set_watchpoint(struct target
*target
,
2296 struct watchpoint
*watchpoint
)
2298 struct xscale_common
*xscale
= target_to_xscale(target
);
2299 uint32_t enable
= 0;
2300 struct reg
*dbcon
= &xscale
->reg_cache
->reg_list
[XSCALE_DBCON
];
2301 uint32_t dbcon_value
= buf_get_u32(dbcon
->value
, 0, 32);
2303 if (target
->state
!= TARGET_HALTED
)
2305 LOG_WARNING("target not halted");
2306 return ERROR_TARGET_NOT_HALTED
;
2309 switch (watchpoint
->rw
)
2321 LOG_ERROR("BUG: watchpoint->rw neither read, write nor access");
2324 /* For watchpoint across more than one word, both DBR registers must
2325 be enlisted, with the second used as a mask. */
2326 if (watchpoint
->length
> 4)
2328 if (xscale
->dbr0_used
|| xscale
->dbr1_used
)
2330 LOG_ERROR("BUG: sufficient hardware comparators unavailable");
2331 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
2334 /* Write mask value to DBR1, based on the length argument.
2335 * Address bits ignored by the comparator are those set in mask. */
2336 xscale_set_reg_u32(&xscale
->reg_cache
->reg_list
[XSCALE_DBR1
],
2337 watchpoint
->length
- 1);
2338 xscale
->dbr1_used
= 1;
2339 enable
|= 0x100; /* DBCON[M] */
2342 if (!xscale
->dbr0_used
)
2344 xscale_set_reg_u32(&xscale
->reg_cache
->reg_list
[XSCALE_DBR0
], watchpoint
->address
);
2345 dbcon_value
|= enable
;
2346 xscale_set_reg_u32(dbcon
, dbcon_value
);
2347 watchpoint
->set
= 1;
2348 xscale
->dbr0_used
= 1;
2350 else if (!xscale
->dbr1_used
)
2352 xscale_set_reg_u32(&xscale
->reg_cache
->reg_list
[XSCALE_DBR1
], watchpoint
->address
);
2353 dbcon_value
|= enable
<< 2;
2354 xscale_set_reg_u32(dbcon
, dbcon_value
);
2355 watchpoint
->set
= 2;
2356 xscale
->dbr1_used
= 1;
2360 LOG_ERROR("BUG: no hardware comparator available");
2361 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
2367 static int xscale_add_watchpoint(struct target
*target
,
2368 struct watchpoint
*watchpoint
)
2370 struct xscale_common
*xscale
= target_to_xscale(target
);
2372 if (xscale
->dbr_available
< 1)
2374 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
2377 if (watchpoint
->value
)
2378 LOG_WARNING("xscale does not support value, mask arguments; ignoring");
2380 /* check that length is a power of two */
2381 for (uint32_t len
= watchpoint
->length
; len
!= 1; len
/= 2)
2385 LOG_ERROR("xscale requires that watchpoint length is a power of two");
2386 return ERROR_COMMAND_ARGUMENT_INVALID
;
2390 if (watchpoint
->length
== 4) /* single word watchpoint */
2392 xscale
->dbr_available
--; /* one DBR reg used */
2396 /* watchpoints across multiple words require both DBR registers */
2397 if (xscale
->dbr_available
< 2)
2398 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE
;
2400 xscale
->dbr_available
= 0;
2404 static int xscale_unset_watchpoint(struct target
*target
,
2405 struct watchpoint
*watchpoint
)
2407 struct xscale_common
*xscale
= target_to_xscale(target
);
2408 struct reg
*dbcon
= &xscale
->reg_cache
->reg_list
[XSCALE_DBCON
];
2409 uint32_t dbcon_value
= buf_get_u32(dbcon
->value
, 0, 32);
2411 if (target
->state
!= TARGET_HALTED
)
2413 LOG_WARNING("target not halted");
2414 return ERROR_TARGET_NOT_HALTED
;
2417 if (!watchpoint
->set
)
2419 LOG_WARNING("breakpoint not set");
2423 if (watchpoint
->set
== 1)
2425 if (watchpoint
->length
> 4)
2427 dbcon_value
&= ~0x103; /* clear DBCON[M] as well */
2428 xscale
->dbr1_used
= 0; /* DBR1 was used for mask */
2431 dbcon_value
&= ~0x3;
2433 xscale_set_reg_u32(dbcon
, dbcon_value
);
2434 xscale
->dbr0_used
= 0;
2436 else if (watchpoint
->set
== 2)
2438 dbcon_value
&= ~0xc;
2439 xscale_set_reg_u32(dbcon
, dbcon_value
);
2440 xscale
->dbr1_used
= 0;
2442 watchpoint
->set
= 0;
2447 static int xscale_remove_watchpoint(struct target
*target
, struct watchpoint
*watchpoint
)
2449 struct xscale_common
*xscale
= target_to_xscale(target
);
2451 if (target
->state
!= TARGET_HALTED
)
2453 LOG_WARNING("target not halted");
2454 return ERROR_TARGET_NOT_HALTED
;
2457 if (watchpoint
->set
)
2459 xscale_unset_watchpoint(target
, watchpoint
);
2462 if (watchpoint
->length
> 4)
2463 xscale
->dbr_available
++; /* both DBR regs now available */
2465 xscale
->dbr_available
++;
2470 static int xscale_get_reg(struct reg
*reg
)
2472 struct xscale_reg
*arch_info
= reg
->arch_info
;
2473 struct target
*target
= arch_info
->target
;
2474 struct xscale_common
*xscale
= target_to_xscale(target
);
2476 /* DCSR, TX and RX are accessible via JTAG */
2477 if (strcmp(reg
->name
, "XSCALE_DCSR") == 0)
2479 return xscale_read_dcsr(arch_info
->target
);
2481 else if (strcmp(reg
->name
, "XSCALE_TX") == 0)
2483 /* 1 = consume register content */
2484 return xscale_read_tx(arch_info
->target
, 1);
2486 else if (strcmp(reg
->name
, "XSCALE_RX") == 0)
2488 /* can't read from RX register (host -> debug handler) */
2491 else if (strcmp(reg
->name
, "XSCALE_TXRXCTRL") == 0)
2493 /* can't (explicitly) read from TXRXCTRL register */
2496 else /* Other DBG registers have to be transfered by the debug handler */
2498 /* send CP read request (command 0x40) */
2499 xscale_send_u32(target
, 0x40);
2501 /* send CP register number */
2502 xscale_send_u32(target
, arch_info
->dbg_handler_number
);
2504 /* read register value */
2505 xscale_read_tx(target
, 1);
2506 buf_cpy(xscale
->reg_cache
->reg_list
[XSCALE_TX
].value
, reg
->value
, 32);
2515 static int xscale_set_reg(struct reg
*reg
, uint8_t* buf
)
2517 struct xscale_reg
*arch_info
= reg
->arch_info
;
2518 struct target
*target
= arch_info
->target
;
2519 struct xscale_common
*xscale
= target_to_xscale(target
);
2520 uint32_t value
= buf_get_u32(buf
, 0, 32);
2522 /* DCSR, TX and RX are accessible via JTAG */
2523 if (strcmp(reg
->name
, "XSCALE_DCSR") == 0)
2525 buf_set_u32(xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].value
, 0, 32, value
);
2526 return xscale_write_dcsr(arch_info
->target
, -1, -1);
2528 else if (strcmp(reg
->name
, "XSCALE_RX") == 0)
2530 buf_set_u32(xscale
->reg_cache
->reg_list
[XSCALE_RX
].value
, 0, 32, value
);
2531 return xscale_write_rx(arch_info
->target
);
2533 else if (strcmp(reg
->name
, "XSCALE_TX") == 0)
2535 /* can't write to TX register (debug-handler -> host) */
2538 else if (strcmp(reg
->name
, "XSCALE_TXRXCTRL") == 0)
2540 /* can't (explicitly) write to TXRXCTRL register */
2543 else /* Other DBG registers have to be transfered by the debug handler */
2545 /* send CP write request (command 0x41) */
2546 xscale_send_u32(target
, 0x41);
2548 /* send CP register number */
2549 xscale_send_u32(target
, arch_info
->dbg_handler_number
);
2551 /* send CP register value */
2552 xscale_send_u32(target
, value
);
2553 buf_set_u32(reg
->value
, 0, 32, value
);
2559 static int xscale_write_dcsr_sw(struct target
*target
, uint32_t value
)
2561 struct xscale_common
*xscale
= target_to_xscale(target
);
2562 struct reg
*dcsr
= &xscale
->reg_cache
->reg_list
[XSCALE_DCSR
];
2563 struct xscale_reg
*dcsr_arch_info
= dcsr
->arch_info
;
2565 /* send CP write request (command 0x41) */
2566 xscale_send_u32(target
, 0x41);
2568 /* send CP register number */
2569 xscale_send_u32(target
, dcsr_arch_info
->dbg_handler_number
);
2571 /* send CP register value */
2572 xscale_send_u32(target
, value
);
2573 buf_set_u32(dcsr
->value
, 0, 32, value
);
2578 static int xscale_read_trace(struct target
*target
)
2580 struct xscale_common
*xscale
= target_to_xscale(target
);
2581 struct arm
*armv4_5
= &xscale
->armv4_5_common
;
2582 struct xscale_trace_data
**trace_data_p
;
2584 /* 258 words from debug handler
2585 * 256 trace buffer entries
2586 * 2 checkpoint addresses
2588 uint32_t trace_buffer
[258];
2589 int is_address
[256];
2591 unsigned int num_checkpoints
= 0;
2593 if (target
->state
!= TARGET_HALTED
)
2595 LOG_WARNING("target must be stopped to read trace data");
2596 return ERROR_TARGET_NOT_HALTED
;
2599 /* send read trace buffer command (command 0x61) */
2600 xscale_send_u32(target
, 0x61);
2602 /* receive trace buffer content */
2603 xscale_receive(target
, trace_buffer
, 258);
2605 /* parse buffer backwards to identify address entries */
2606 for (i
= 255; i
>= 0; i
--)
2608 /* also count number of checkpointed entries */
2609 if ((trace_buffer
[i
] & 0xe0) == 0xc0)
2613 if (((trace_buffer
[i
] & 0xf0) == 0x90) ||
2614 ((trace_buffer
[i
] & 0xf0) == 0xd0))
2617 is_address
[--i
] = 1;
2619 is_address
[--i
] = 1;
2621 is_address
[--i
] = 1;
2623 is_address
[--i
] = 1;
2628 /* search first non-zero entry that is not part of an address */
2629 for (j
= 0; (j
< 256) && (trace_buffer
[j
] == 0) && (!is_address
[j
]); j
++)
2634 LOG_DEBUG("no trace data collected");
2635 return ERROR_XSCALE_NO_TRACE_DATA
;
2638 /* account for possible partial address at buffer start (wrap mode only) */
2640 { /* first entry is address; complete set of 4? */
2643 if (!is_address
[i
++])
2646 j
+= i
; /* partial address; can't use it */
2649 /* if first valid entry is indirect branch, can't use that either (no address) */
2650 if (((trace_buffer
[j
] & 0xf0) == 0x90) || ((trace_buffer
[j
] & 0xf0) == 0xd0))
2653 /* walk linked list to terminating entry */
2654 for (trace_data_p
= &xscale
->trace
.data
; *trace_data_p
; trace_data_p
= &(*trace_data_p
)->next
)
2657 *trace_data_p
= malloc(sizeof(struct xscale_trace_data
));
2658 (*trace_data_p
)->next
= NULL
;
2659 (*trace_data_p
)->chkpt0
= trace_buffer
[256];
2660 (*trace_data_p
)->chkpt1
= trace_buffer
[257];
2661 (*trace_data_p
)->last_instruction
=
2662 buf_get_u32(armv4_5
->pc
->value
, 0, 32);
2663 (*trace_data_p
)->entries
= malloc(sizeof(struct xscale_trace_entry
) * (256 - j
));
2664 (*trace_data_p
)->depth
= 256 - j
;
2665 (*trace_data_p
)->num_checkpoints
= num_checkpoints
;
2667 for (i
= j
; i
< 256; i
++)
2669 (*trace_data_p
)->entries
[i
- j
].data
= trace_buffer
[i
];
2671 (*trace_data_p
)->entries
[i
- j
].type
= XSCALE_TRACE_ADDRESS
;
2673 (*trace_data_p
)->entries
[i
- j
].type
= XSCALE_TRACE_MESSAGE
;
2679 static int xscale_read_instruction(struct target
*target
, uint32_t pc
,
2680 struct arm_instruction
*instruction
)
2682 struct xscale_common
*const xscale
= target_to_xscale(target
);
2689 if (!xscale
->trace
.image
)
2690 return ERROR_TRACE_IMAGE_UNAVAILABLE
;
2692 /* search for the section the current instruction belongs to */
2693 for (i
= 0; i
< xscale
->trace
.image
->num_sections
; i
++)
2695 if ((xscale
->trace
.image
->sections
[i
].base_address
<= pc
) &&
2696 (xscale
->trace
.image
->sections
[i
].base_address
+ xscale
->trace
.image
->sections
[i
].size
> pc
))
2705 /* current instruction couldn't be found in the image */
2706 return ERROR_TRACE_INSTRUCTION_UNAVAILABLE
;
2709 if (xscale
->trace
.core_state
== ARM_STATE_ARM
)
2712 if ((retval
= image_read_section(xscale
->trace
.image
, section
,
2713 pc
- xscale
->trace
.image
->sections
[section
].base_address
,
2714 4, buf
, &size_read
)) != ERROR_OK
)
2716 LOG_ERROR("error while reading instruction: %i", retval
);
2717 return ERROR_TRACE_INSTRUCTION_UNAVAILABLE
;
2719 opcode
= target_buffer_get_u32(target
, buf
);
2720 arm_evaluate_opcode(opcode
, pc
, instruction
);
2722 else if (xscale
->trace
.core_state
== ARM_STATE_THUMB
)
2725 if ((retval
= image_read_section(xscale
->trace
.image
, section
,
2726 pc
- xscale
->trace
.image
->sections
[section
].base_address
,
2727 2, buf
, &size_read
)) != ERROR_OK
)
2729 LOG_ERROR("error while reading instruction: %i", retval
);
2730 return ERROR_TRACE_INSTRUCTION_UNAVAILABLE
;
2732 opcode
= target_buffer_get_u16(target
, buf
);
2733 thumb_evaluate_opcode(opcode
, pc
, instruction
);
2737 LOG_ERROR("BUG: unknown core state encountered");
2744 /* Extract address encoded into trace data.
2745 * Write result to address referenced by argument 'target', or 0 if incomplete. */
2746 static inline void xscale_branch_address(struct xscale_trace_data
*trace_data
,
2747 int i
, uint32_t *target
)
2749 /* if there are less than four entries prior to the indirect branch message
2750 * we can't extract the address */
2754 *target
= (trace_data
->entries
[i
-1].data
) | (trace_data
->entries
[i
-2].data
<< 8) |
2755 (trace_data
->entries
[i
-3].data
<< 16) | (trace_data
->entries
[i
-4].data
<< 24);
2758 static inline void xscale_display_instruction(struct target
*target
, uint32_t pc
,
2759 struct arm_instruction
*instruction
,
2760 struct command_context
*cmd_ctx
)
2762 int retval
= xscale_read_instruction(target
, pc
, instruction
);
2763 if (retval
== ERROR_OK
)
2764 command_print(cmd_ctx
, "%s", instruction
->text
);
2766 command_print(cmd_ctx
, "0x%8.8" PRIx32
"\t<not found in image>", pc
);
2769 static int xscale_analyze_trace(struct target
*target
, struct command_context
*cmd_ctx
)
2771 struct xscale_common
*xscale
= target_to_xscale(target
);
2772 struct xscale_trace_data
*trace_data
= xscale
->trace
.data
;
2774 uint32_t breakpoint_pc
;
2775 struct arm_instruction instruction
;
2776 uint32_t current_pc
= 0; /* initialized when address determined */
2778 if (!xscale
->trace
.image
)
2779 LOG_WARNING("No trace image loaded; use 'xscale trace_image'");
2781 /* loop for each trace buffer that was loaded from target */
2784 int chkpt
= 0; /* incremented as checkpointed entries found */
2787 /* FIXME: set this to correct mode when trace buffer is first enabled */
2788 xscale
->trace
.core_state
= ARM_STATE_ARM
;
2790 /* loop for each entry in this trace buffer */
2791 for (i
= 0; i
< trace_data
->depth
; i
++)
2794 uint32_t chkpt_reg
= 0x0;
2795 uint32_t branch_target
= 0;
2798 /* trace entry type is upper nybble of 'message byte' */
2799 int trace_msg_type
= (trace_data
->entries
[i
].data
& 0xf0) >> 4;
2801 /* Target addresses of indirect branches are written into buffer
2802 * before the message byte representing the branch. Skip past it */
2803 if (trace_data
->entries
[i
].type
== XSCALE_TRACE_ADDRESS
)
2806 switch (trace_msg_type
)
2808 case 0: /* Exceptions */
2816 exception
= (trace_data
->entries
[i
].data
& 0x70) >> 4;
2818 /* FIXME: vector table may be at ffff0000 */
2819 branch_target
= (trace_data
->entries
[i
].data
& 0xf0) >> 2;
2822 case 8: /* Direct Branch */
2825 case 9: /* Indirect Branch */
2826 xscale_branch_address(trace_data
, i
, &branch_target
);
2829 case 13: /* Checkpointed Indirect Branch */
2830 xscale_branch_address(trace_data
, i
, &branch_target
);
2831 if ((trace_data
->num_checkpoints
== 2) && (chkpt
== 0))
2832 chkpt_reg
= trace_data
->chkpt1
; /* 2 chkpts, this is oldest */
2834 chkpt_reg
= trace_data
->chkpt0
; /* 1 chkpt, or 2 and newest */
2839 case 12: /* Checkpointed Direct Branch */
2840 if ((trace_data
->num_checkpoints
== 2) && (chkpt
== 0))
2841 chkpt_reg
= trace_data
->chkpt1
; /* 2 chkpts, this is oldest */
2843 chkpt_reg
= trace_data
->chkpt0
; /* 1 chkpt, or 2 and newest */
2845 /* if no current_pc, checkpoint will be starting point */
2846 if (current_pc
== 0)
2847 branch_target
= chkpt_reg
;
2852 case 15: /* Roll-over */
2855 default: /* Reserved */
2856 LOG_WARNING("trace is suspect: invalid trace message byte");
2861 /* If we don't have the current_pc yet, but we did get the branch target
2862 * (either from the trace buffer on indirect branch, or from a checkpoint reg),
2863 * then we can start displaying instructions at the next iteration, with
2864 * branch_target as the starting point.
2866 if (current_pc
== 0)
2868 current_pc
= branch_target
; /* remains 0 unless branch_target obtained */
2872 /* We have current_pc. Read and display the instructions from the image.
2873 * First, display count instructions (lower nybble of message byte). */
2874 count
= trace_data
->entries
[i
].data
& 0x0f;
2875 for (j
= 0; j
< count
; j
++)
2877 xscale_display_instruction(target
, current_pc
, &instruction
, cmd_ctx
);
2878 current_pc
+= xscale
->trace
.core_state
== ARM_STATE_ARM
? 4 : 2;
2881 /* An additional instruction is implicitly added to count for
2882 * rollover and some exceptions: undef, swi, prefetch abort. */
2883 if ((trace_msg_type
== 15) || (exception
> 0 && exception
< 4))
2885 xscale_display_instruction(target
, current_pc
, &instruction
, cmd_ctx
);
2886 current_pc
+= xscale
->trace
.core_state
== ARM_STATE_ARM
? 4 : 2;
2889 if (trace_msg_type
== 15) /* rollover */
2894 command_print(cmd_ctx
, "--- exception %i ---", exception
);
2898 /* not exception or rollover; next instruction is a branch and is
2899 * not included in the count */
2900 xscale_display_instruction(target
, current_pc
, &instruction
, cmd_ctx
);
2902 /* for direct branches, extract branch destination from instruction */
2903 if ((trace_msg_type
== 8) || (trace_msg_type
== 12))
2905 retval
= xscale_read_instruction(target
, current_pc
, &instruction
);
2906 if (retval
== ERROR_OK
)
2907 current_pc
= instruction
.info
.b_bl_bx_blx
.target_address
;
2909 current_pc
= 0; /* branch destination unknown */
2911 /* direct branch w/ checkpoint; can also get from checkpoint reg */
2912 if (trace_msg_type
== 12)
2914 if (current_pc
== 0)
2915 current_pc
= chkpt_reg
;
2916 else if (current_pc
!= chkpt_reg
) /* sanity check */
2917 LOG_WARNING("trace is suspect: checkpoint register "
2918 "inconsistent with adddress from image");
2921 if (current_pc
== 0)
2922 command_print(cmd_ctx
, "address unknown");
2927 /* indirect branch; the branch destination was read from trace buffer */
2928 if ((trace_msg_type
== 9) || (trace_msg_type
== 13))
2930 current_pc
= branch_target
;
2932 /* sanity check (checkpoint reg is redundant) */
2933 if ((trace_msg_type
== 13) && (chkpt_reg
!= branch_target
))
2934 LOG_WARNING("trace is suspect: checkpoint register "
2935 "inconsistent with address from trace buffer");
2938 } /* END: for (i = 0; i < trace_data->depth; i++) */
2940 breakpoint_pc
= trace_data
->last_instruction
; /* used below */
2941 trace_data
= trace_data
->next
;
2943 } /* END: while (trace_data) */
2945 /* Finally... display all instructions up to the value of the pc when the
2946 * debug break occurred (saved when trace data was collected from target).
2947 * This is necessary because the trace only records execution branches and 16
2948 * consecutive instructions (rollovers), so last few typically missed.
2950 if (current_pc
== 0)
2951 return ERROR_OK
; /* current_pc was never found */
2953 /* how many instructions remaining? */
2954 int gap_count
= (breakpoint_pc
- current_pc
) /
2955 (xscale
->trace
.core_state
== ARM_STATE_ARM
? 4 : 2);
2957 /* should never be negative or over 16, but verify */
2958 if (gap_count
< 0 || gap_count
> 16)
2960 LOG_WARNING("trace is suspect: excessive gap at end of trace");
2961 return ERROR_OK
; /* bail; large number or negative value no good */
2964 /* display remaining instructions */
2965 for (i
= 0; i
< gap_count
; i
++)
2967 xscale_display_instruction(target
, current_pc
, &instruction
, cmd_ctx
);
2968 current_pc
+= xscale
->trace
.core_state
== ARM_STATE_ARM
? 4 : 2;
2974 static const struct reg_arch_type xscale_reg_type
= {
2975 .get
= xscale_get_reg
,
2976 .set
= xscale_set_reg
,
2979 static void xscale_build_reg_cache(struct target
*target
)
2981 struct xscale_common
*xscale
= target_to_xscale(target
);
2982 struct arm
*armv4_5
= &xscale
->armv4_5_common
;
2983 struct reg_cache
**cache_p
= register_get_last_cache_p(&target
->reg_cache
);
2984 struct xscale_reg
*arch_info
= malloc(sizeof(xscale_reg_arch_info
));
2986 int num_regs
= ARRAY_SIZE(xscale_reg_arch_info
);
2988 (*cache_p
) = arm_build_reg_cache(target
, armv4_5
);
2990 (*cache_p
)->next
= malloc(sizeof(struct reg_cache
));
2991 cache_p
= &(*cache_p
)->next
;
2993 /* fill in values for the xscale reg cache */
2994 (*cache_p
)->name
= "XScale registers";
2995 (*cache_p
)->next
= NULL
;
2996 (*cache_p
)->reg_list
= malloc(num_regs
* sizeof(struct reg
));
2997 (*cache_p
)->num_regs
= num_regs
;
2999 for (i
= 0; i
< num_regs
; i
++)
3001 (*cache_p
)->reg_list
[i
].name
= xscale_reg_list
[i
];
3002 (*cache_p
)->reg_list
[i
].value
= calloc(4, 1);
3003 (*cache_p
)->reg_list
[i
].dirty
= 0;
3004 (*cache_p
)->reg_list
[i
].valid
= 0;
3005 (*cache_p
)->reg_list
[i
].size
= 32;
3006 (*cache_p
)->reg_list
[i
].arch_info
= &arch_info
[i
];
3007 (*cache_p
)->reg_list
[i
].type
= &xscale_reg_type
;
3008 arch_info
[i
] = xscale_reg_arch_info
[i
];
3009 arch_info
[i
].target
= target
;
3012 xscale
->reg_cache
= (*cache_p
);
3015 static int xscale_init_target(struct command_context
*cmd_ctx
,
3016 struct target
*target
)
3018 xscale_build_reg_cache(target
);
3022 static int xscale_init_arch_info(struct target
*target
,
3023 struct xscale_common
*xscale
, struct jtag_tap
*tap
, const char *variant
)
3025 struct arm
*armv4_5
;
3026 uint32_t high_reset_branch
, low_reset_branch
;
3029 armv4_5
= &xscale
->armv4_5_common
;
3031 /* store architecture specfic data */
3032 xscale
->common_magic
= XSCALE_COMMON_MAGIC
;
3034 /* we don't really *need* a variant param ... */
3038 if (strcmp(variant
, "pxa250") == 0
3039 || strcmp(variant
, "pxa255") == 0
3040 || strcmp(variant
, "pxa26x") == 0)
3042 else if (strcmp(variant
, "pxa27x") == 0
3043 || strcmp(variant
, "ixp42x") == 0
3044 || strcmp(variant
, "ixp45x") == 0
3045 || strcmp(variant
, "ixp46x") == 0)
3047 else if (strcmp(variant
, "pxa3xx") == 0)
3050 LOG_WARNING("%s: unrecognized variant %s",
3051 tap
->dotted_name
, variant
);
3053 if (ir_length
&& ir_length
!= tap
->ir_length
) {
3054 LOG_WARNING("%s: IR length for %s is %d; fixing",
3055 tap
->dotted_name
, variant
, ir_length
);
3056 tap
->ir_length
= ir_length
;
3060 /* PXA3xx shifts the JTAG instructions */
3061 if (tap
->ir_length
== 11)
3062 xscale
->xscale_variant
= XSCALE_PXA3XX
;
3064 xscale
->xscale_variant
= XSCALE_IXP4XX_PXA2XX
;
3066 /* the debug handler isn't installed (and thus not running) at this time */
3067 xscale
->handler_address
= 0xfe000800;
3069 /* clear the vectors we keep locally for reference */
3070 memset(xscale
->low_vectors
, 0, sizeof(xscale
->low_vectors
));
3071 memset(xscale
->high_vectors
, 0, sizeof(xscale
->high_vectors
));
3073 /* no user-specified vectors have been configured yet */
3074 xscale
->static_low_vectors_set
= 0x0;
3075 xscale
->static_high_vectors_set
= 0x0;
3077 /* calculate branches to debug handler */
3078 low_reset_branch
= (xscale
->handler_address
+ 0x20 - 0x0 - 0x8) >> 2;
3079 high_reset_branch
= (xscale
->handler_address
+ 0x20 - 0xffff0000 - 0x8) >> 2;
3081 xscale
->low_vectors
[0] = ARMV4_5_B((low_reset_branch
& 0xffffff), 0);
3082 xscale
->high_vectors
[0] = ARMV4_5_B((high_reset_branch
& 0xffffff), 0);
3084 for (i
= 1; i
<= 7; i
++)
3086 xscale
->low_vectors
[i
] = ARMV4_5_B(0xfffffe, 0);
3087 xscale
->high_vectors
[i
] = ARMV4_5_B(0xfffffe, 0);
3090 /* 64kB aligned region used for DCache cleaning */
3091 xscale
->cache_clean_address
= 0xfffe0000;
3093 xscale
->hold_rst
= 0;
3094 xscale
->external_debug_break
= 0;
3096 xscale
->ibcr_available
= 2;
3097 xscale
->ibcr0_used
= 0;
3098 xscale
->ibcr1_used
= 0;
3100 xscale
->dbr_available
= 2;
3101 xscale
->dbr0_used
= 0;
3102 xscale
->dbr1_used
= 0;
3104 LOG_INFO("%s: hardware has 2 breakpoints and 2 watchpoints",
3105 target_name(target
));
3107 xscale
->arm_bkpt
= ARMV5_BKPT(0x0);
3108 xscale
->thumb_bkpt
= ARMV5_T_BKPT(0x0) & 0xffff;
3110 xscale
->vector_catch
= 0x1;
3112 xscale
->trace
.capture_status
= TRACE_IDLE
;
3113 xscale
->trace
.data
= NULL
;
3114 xscale
->trace
.image
= NULL
;
3115 xscale
->trace
.buffer_enabled
= 0;
3116 xscale
->trace
.buffer_fill
= 0;
3118 /* prepare ARMv4/5 specific information */
3119 armv4_5
->arch_info
= xscale
;
3120 armv4_5
->read_core_reg
= xscale_read_core_reg
;
3121 armv4_5
->write_core_reg
= xscale_write_core_reg
;
3122 armv4_5
->full_context
= xscale_full_context
;
3124 arm_init_arch_info(target
, armv4_5
);
3126 xscale
->armv4_5_mmu
.armv4_5_cache
.ctype
= -1;
3127 xscale
->armv4_5_mmu
.get_ttb
= xscale_get_ttb
;
3128 xscale
->armv4_5_mmu
.read_memory
= xscale_read_memory
;
3129 xscale
->armv4_5_mmu
.write_memory
= xscale_write_memory
;
3130 xscale
->armv4_5_mmu
.disable_mmu_caches
= xscale_disable_mmu_caches
;
3131 xscale
->armv4_5_mmu
.enable_mmu_caches
= xscale_enable_mmu_caches
;
3132 xscale
->armv4_5_mmu
.has_tiny_pages
= 1;
3133 xscale
->armv4_5_mmu
.mmu_enabled
= 0;
3138 static int xscale_target_create(struct target
*target
, Jim_Interp
*interp
)
3140 struct xscale_common
*xscale
;
3142 if (sizeof xscale_debug_handler
- 1 > 0x800) {
3143 LOG_ERROR("debug_handler.bin: larger than 2kb");
3147 xscale
= calloc(1, sizeof(*xscale
));
3151 return xscale_init_arch_info(target
, xscale
, target
->tap
,
3155 COMMAND_HANDLER(xscale_handle_debug_handler_command
)
3157 struct target
*target
= NULL
;
3158 struct xscale_common
*xscale
;
3160 uint32_t handler_address
;
3164 LOG_ERROR("'xscale debug_handler <target#> <address>' command takes two required operands");
3168 if ((target
= get_target(CMD_ARGV
[0])) == NULL
)
3170 LOG_ERROR("target '%s' not defined", CMD_ARGV
[0]);
3174 xscale
= target_to_xscale(target
);
3175 retval
= xscale_verify_pointer(CMD_CTX
, xscale
);
3176 if (retval
!= ERROR_OK
)
3179 COMMAND_PARSE_NUMBER(u32
, CMD_ARGV
[1], handler_address
);
3181 if (((handler_address
>= 0x800) && (handler_address
<= 0x1fef800)) ||
3182 ((handler_address
>= 0xfe000800) && (handler_address
<= 0xfffff800)))
3184 xscale
->handler_address
= handler_address
;
3188 LOG_ERROR("xscale debug_handler <address> must be between 0x800 and 0x1fef800 or between 0xfe000800 and 0xfffff800");
3195 COMMAND_HANDLER(xscale_handle_cache_clean_address_command
)
3197 struct target
*target
= NULL
;
3198 struct xscale_common
*xscale
;
3200 uint32_t cache_clean_address
;
3204 return ERROR_COMMAND_SYNTAX_ERROR
;
3207 target
= get_target(CMD_ARGV
[0]);
3210 LOG_ERROR("target '%s' not defined", CMD_ARGV
[0]);
3213 xscale
= target_to_xscale(target
);
3214 retval
= xscale_verify_pointer(CMD_CTX
, xscale
);
3215 if (retval
!= ERROR_OK
)
3218 COMMAND_PARSE_NUMBER(u32
, CMD_ARGV
[1], cache_clean_address
);
3220 if (cache_clean_address
& 0xffff)
3222 LOG_ERROR("xscale cache_clean_address <address> must be 64kb aligned");
3226 xscale
->cache_clean_address
= cache_clean_address
;
3232 COMMAND_HANDLER(xscale_handle_cache_info_command
)
3234 struct target
*target
= get_current_target(CMD_CTX
);
3235 struct xscale_common
*xscale
= target_to_xscale(target
);
3238 retval
= xscale_verify_pointer(CMD_CTX
, xscale
);
3239 if (retval
!= ERROR_OK
)
3242 return armv4_5_handle_cache_info_command(CMD_CTX
, &xscale
->armv4_5_mmu
.armv4_5_cache
);
3245 static int xscale_virt2phys(struct target
*target
,
3246 uint32_t virtual, uint32_t *physical
)
3248 struct xscale_common
*xscale
= target_to_xscale(target
);
3251 if (xscale
->common_magic
!= XSCALE_COMMON_MAGIC
) {
3252 LOG_ERROR(xscale_not
);
3253 return ERROR_TARGET_INVALID
;
3257 int retval
= armv4_5_mmu_translate_va(target
, &xscale
->armv4_5_mmu
,
3258 virtual, &cb
, &ret
);
3259 if (retval
!= ERROR_OK
)
3265 static int xscale_mmu(struct target
*target
, int *enabled
)
3267 struct xscale_common
*xscale
= target_to_xscale(target
);
3269 if (target
->state
!= TARGET_HALTED
)
3271 LOG_ERROR("Target not halted");
3272 return ERROR_TARGET_INVALID
;
3274 *enabled
= xscale
->armv4_5_mmu
.mmu_enabled
;
3278 COMMAND_HANDLER(xscale_handle_mmu_command
)
3280 struct target
*target
= get_current_target(CMD_CTX
);
3281 struct xscale_common
*xscale
= target_to_xscale(target
);
3284 retval
= xscale_verify_pointer(CMD_CTX
, xscale
);
3285 if (retval
!= ERROR_OK
)
3288 if (target
->state
!= TARGET_HALTED
)
3290 command_print(CMD_CTX
, "target must be stopped for \"%s\" command", CMD_NAME
);
3297 COMMAND_PARSE_ENABLE(CMD_ARGV
[0], enable
);
3299 xscale_enable_mmu_caches(target
, 1, 0, 0);
3301 xscale_disable_mmu_caches(target
, 1, 0, 0);
3302 xscale
->armv4_5_mmu
.mmu_enabled
= enable
;
3305 command_print(CMD_CTX
, "mmu %s", (xscale
->armv4_5_mmu
.mmu_enabled
) ? "enabled" : "disabled");
3310 COMMAND_HANDLER(xscale_handle_idcache_command
)
3312 struct target
*target
= get_current_target(CMD_CTX
);
3313 struct xscale_common
*xscale
= target_to_xscale(target
);
3315 int retval
= xscale_verify_pointer(CMD_CTX
, xscale
);
3316 if (retval
!= ERROR_OK
)
3319 if (target
->state
!= TARGET_HALTED
)
3321 command_print(CMD_CTX
, "target must be stopped for \"%s\" command", CMD_NAME
);
3325 bool icache
= false;
3326 if (strcmp(CMD_NAME
, "icache") == 0)
3331 COMMAND_PARSE_ENABLE(CMD_ARGV
[0], enable
);
3333 xscale
->armv4_5_mmu
.armv4_5_cache
.i_cache_enabled
= enable
;
3335 xscale_enable_mmu_caches(target
, 0, 0, 1);
3337 xscale_disable_mmu_caches(target
, 0, 0, 1);
3339 xscale
->armv4_5_mmu
.armv4_5_cache
.d_u_cache_enabled
= enable
;
3341 xscale_enable_mmu_caches(target
, 0, 1, 0);
3343 xscale_disable_mmu_caches(target
, 0, 1, 0);
3347 bool enabled
= icache
?
3348 xscale
->armv4_5_mmu
.armv4_5_cache
.i_cache_enabled
:
3349 xscale
->armv4_5_mmu
.armv4_5_cache
.d_u_cache_enabled
;
3350 const char *msg
= enabled
? "enabled" : "disabled";
3351 command_print(CMD_CTX
, "%s %s", CMD_NAME
, msg
);
3356 COMMAND_HANDLER(xscale_handle_vector_catch_command
)
3358 struct target
*target
= get_current_target(CMD_CTX
);
3359 struct xscale_common
*xscale
= target_to_xscale(target
);
3362 retval
= xscale_verify_pointer(CMD_CTX
, xscale
);
3363 if (retval
!= ERROR_OK
)
3368 command_print(CMD_CTX
, "usage: xscale vector_catch [mask]");
3372 COMMAND_PARSE_NUMBER(u8
, CMD_ARGV
[0], xscale
->vector_catch
);
3373 buf_set_u32(xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].value
, 16, 8, xscale
->vector_catch
);
3374 xscale_write_dcsr(target
, -1, -1);
3377 command_print(CMD_CTX
, "vector catch mask: 0x%2.2x", xscale
->vector_catch
);
3383 COMMAND_HANDLER(xscale_handle_vector_table_command
)
3385 struct target
*target
= get_current_target(CMD_CTX
);
3386 struct xscale_common
*xscale
= target_to_xscale(target
);
3390 retval
= xscale_verify_pointer(CMD_CTX
, xscale
);
3391 if (retval
!= ERROR_OK
)
3394 if (CMD_ARGC
== 0) /* print current settings */
3398 command_print(CMD_CTX
, "active user-set static vectors:");
3399 for (idx
= 1; idx
< 8; idx
++)
3400 if (xscale
->static_low_vectors_set
& (1 << idx
))
3401 command_print(CMD_CTX
, "low %d: 0x%" PRIx32
, idx
, xscale
->static_low_vectors
[idx
]);
3402 for (idx
= 1; idx
< 8; idx
++)
3403 if (xscale
->static_high_vectors_set
& (1 << idx
))
3404 command_print(CMD_CTX
, "high %d: 0x%" PRIx32
, idx
, xscale
->static_high_vectors
[idx
]);
3413 COMMAND_PARSE_NUMBER(int, CMD_ARGV
[1], idx
);
3415 COMMAND_PARSE_NUMBER(u32
, CMD_ARGV
[2], vec
);
3417 if (idx
< 1 || idx
>= 8)
3420 if (!err
&& strcmp(CMD_ARGV
[0], "low") == 0)
3422 xscale
->static_low_vectors_set
|= (1<<idx
);
3423 xscale
->static_low_vectors
[idx
] = vec
;
3425 else if (!err
&& (strcmp(CMD_ARGV
[0], "high") == 0))
3427 xscale
->static_high_vectors_set
|= (1<<idx
);
3428 xscale
->static_high_vectors
[idx
] = vec
;
3435 command_print(CMD_CTX
, "usage: xscale vector_table <high|low> <index> <code>");
3441 COMMAND_HANDLER(xscale_handle_trace_buffer_command
)
3443 struct target
*target
= get_current_target(CMD_CTX
);
3444 struct xscale_common
*xscale
= target_to_xscale(target
);
3445 uint32_t dcsr_value
;
3448 retval
= xscale_verify_pointer(CMD_CTX
, xscale
);
3449 if (retval
!= ERROR_OK
)
3452 if (target
->state
!= TARGET_HALTED
)
3454 command_print(CMD_CTX
, "target must be stopped for \"%s\" command", CMD_NAME
);
3458 if ((CMD_ARGC
>= 1) && (strcmp("enable", CMD_ARGV
[0]) == 0))
3460 struct xscale_trace_data
*td
, *next_td
;
3461 xscale
->trace
.buffer_enabled
= 1;
3463 /* free old trace data */
3464 td
= xscale
->trace
.data
;
3474 xscale
->trace
.data
= NULL
;
3476 else if ((CMD_ARGC
>= 1) && (strcmp("disable", CMD_ARGV
[0]) == 0))
3478 xscale
->trace
.buffer_enabled
= 0;
3481 if ((CMD_ARGC
>= 2) && (strcmp("fill", CMD_ARGV
[1]) == 0))
3485 COMMAND_PARSE_NUMBER(u32
, CMD_ARGV
[2], fill
);
3486 xscale
->trace
.buffer_fill
= fill
;
3488 else if ((CMD_ARGC
>= 2) && (strcmp("wrap", CMD_ARGV
[1]) == 0))
3490 xscale
->trace
.buffer_fill
= -1;
3493 command_print(CMD_CTX
, "trace buffer %s (%s)",
3494 (xscale
->trace
.buffer_enabled
) ? "enabled" : "disabled",
3495 (xscale
->trace
.buffer_fill
> 0) ? "fill" : "wrap");
3497 dcsr_value
= buf_get_u32(xscale
->reg_cache
->reg_list
[XSCALE_DCSR
].value
, 0, 32);
3498 if (xscale
->trace
.buffer_fill
>= 0)
3499 xscale_write_dcsr_sw(target
, (dcsr_value
& 0xfffffffc) | 2);
3501 xscale_write_dcsr_sw(target
, dcsr_value
& 0xfffffffc);
3506 COMMAND_HANDLER(xscale_handle_trace_image_command
)
3508 struct target
*target
= get_current_target(CMD_CTX
);
3509 struct xscale_common
*xscale
= target_to_xscale(target
);
3514 command_print(CMD_CTX
, "usage: xscale trace_image <file> [base address] [type]");
3518 retval
= xscale_verify_pointer(CMD_CTX
, xscale
);
3519 if (retval
!= ERROR_OK
)
3522 if (xscale
->trace
.image
)
3524 image_close(xscale
->trace
.image
);
3525 free(xscale
->trace
.image
);
3526 command_print(CMD_CTX
, "previously loaded image found and closed");
3529 xscale
->trace
.image
= malloc(sizeof(struct image
));
3530 xscale
->trace
.image
->base_address_set
= 0;
3531 xscale
->trace
.image
->start_address_set
= 0;
3533 /* a base address isn't always necessary, default to 0x0 (i.e. don't relocate) */
3536 xscale
->trace
.image
->base_address_set
= 1;
3537 COMMAND_PARSE_NUMBER(llong
, CMD_ARGV
[1], xscale
->trace
.image
->base_address
);
3541 xscale
->trace
.image
->base_address_set
= 0;
3544 if (image_open(xscale
->trace
.image
, CMD_ARGV
[0], (CMD_ARGC
>= 3) ? CMD_ARGV
[2] : NULL
) != ERROR_OK
)
3546 free(xscale
->trace
.image
);
3547 xscale
->trace
.image
= NULL
;
3554 COMMAND_HANDLER(xscale_handle_dump_trace_command
)
3556 struct target
*target
= get_current_target(CMD_CTX
);
3557 struct xscale_common
*xscale
= target_to_xscale(target
);
3558 struct xscale_trace_data
*trace_data
;
3562 retval
= xscale_verify_pointer(CMD_CTX
, xscale
);
3563 if (retval
!= ERROR_OK
)
3566 if (target
->state
!= TARGET_HALTED
)
3568 command_print(CMD_CTX
, "target must be stopped for \"%s\" command", CMD_NAME
);
3574 command_print(CMD_CTX
, "usage: xscale dump_trace <file>");
3578 trace_data
= xscale
->trace
.data
;
3582 command_print(CMD_CTX
, "no trace data collected");
3586 if (fileio_open(&file
, CMD_ARGV
[0], FILEIO_WRITE
, FILEIO_BINARY
) != ERROR_OK
)
3595 fileio_write_u32(&file
, trace_data
->chkpt0
);
3596 fileio_write_u32(&file
, trace_data
->chkpt1
);
3597 fileio_write_u32(&file
, trace_data
->last_instruction
);
3598 fileio_write_u32(&file
, trace_data
->depth
);
3600 for (i
= 0; i
< trace_data
->depth
; i
++)
3601 fileio_write_u32(&file
, trace_data
->entries
[i
].data
| ((trace_data
->entries
[i
].type
& 0xffff) << 16));
3603 trace_data
= trace_data
->next
;
3606 fileio_close(&file
);
3611 COMMAND_HANDLER(xscale_handle_analyze_trace_buffer_command
)
3613 struct target
*target
= get_current_target(CMD_CTX
);
3614 struct xscale_common
*xscale
= target_to_xscale(target
);
3617 retval
= xscale_verify_pointer(CMD_CTX
, xscale
);
3618 if (retval
!= ERROR_OK
)
3621 xscale_analyze_trace(target
, CMD_CTX
);
3626 COMMAND_HANDLER(xscale_handle_cp15
)
3628 struct target
*target
= get_current_target(CMD_CTX
);
3629 struct xscale_common
*xscale
= target_to_xscale(target
);
3632 retval
= xscale_verify_pointer(CMD_CTX
, xscale
);
3633 if (retval
!= ERROR_OK
)
3636 if (target
->state
!= TARGET_HALTED
)
3638 command_print(CMD_CTX
, "target must be stopped for \"%s\" command", CMD_NAME
);
3641 uint32_t reg_no
= 0;
3642 struct reg
*reg
= NULL
;
3645 COMMAND_PARSE_NUMBER(u32
, CMD_ARGV
[0], reg_no
);
3646 /*translate from xscale cp15 register no to openocd register*/
3650 reg_no
= XSCALE_MAINID
;
3653 reg_no
= XSCALE_CTRL
;
3656 reg_no
= XSCALE_TTB
;
3659 reg_no
= XSCALE_DAC
;
3662 reg_no
= XSCALE_FSR
;
3665 reg_no
= XSCALE_FAR
;
3668 reg_no
= XSCALE_PID
;
3671 reg_no
= XSCALE_CPACCESS
;
3674 command_print(CMD_CTX
, "invalid register number");
3675 return ERROR_INVALID_ARGUMENTS
;
3677 reg
= &xscale
->reg_cache
->reg_list
[reg_no
];
3684 /* read cp15 control register */
3685 xscale_get_reg(reg
);
3686 value
= buf_get_u32(reg
->value
, 0, 32);
3687 command_print(CMD_CTX
, "%s (/%i): 0x%" PRIx32
"", reg
->name
, (int)(reg
->size
), value
);
3689 else if (CMD_ARGC
== 2)
3692 COMMAND_PARSE_NUMBER(u32
, CMD_ARGV
[1], value
);
3694 /* send CP write request (command 0x41) */
3695 xscale_send_u32(target
, 0x41);
3697 /* send CP register number */
3698 xscale_send_u32(target
, reg_no
);
3700 /* send CP register value */
3701 xscale_send_u32(target
, value
);
3703 /* execute cpwait to ensure outstanding operations complete */
3704 xscale_send_u32(target
, 0x53);
3708 command_print(CMD_CTX
, "usage: cp15 [register]<, [value]>");
3714 static const struct command_registration xscale_exec_command_handlers
[] = {
3716 .name
= "cache_info",
3717 .handler
= xscale_handle_cache_info_command
,
3718 .mode
= COMMAND_EXEC
,
3719 .help
= "display information about CPU caches",
3723 .handler
= xscale_handle_mmu_command
,
3724 .mode
= COMMAND_EXEC
,
3725 .help
= "enable or disable the MMU",
3726 .usage
= "['enable'|'disable']",
3730 .handler
= xscale_handle_idcache_command
,
3731 .mode
= COMMAND_EXEC
,
3732 .help
= "display ICache state, optionally enabling or "
3734 .usage
= "['enable'|'disable']",
3738 .handler
= xscale_handle_idcache_command
,
3739 .mode
= COMMAND_EXEC
,
3740 .help
= "display DCache state, optionally enabling or "
3742 .usage
= "['enable'|'disable']",
3745 .name
= "vector_catch",
3746 .handler
= xscale_handle_vector_catch_command
,
3747 .mode
= COMMAND_EXEC
,
3748 .help
= "set or display 8-bit mask of vectors "
3749 "that should trigger debug entry",
3753 .name
= "vector_table",
3754 .handler
= xscale_handle_vector_table_command
,
3755 .mode
= COMMAND_EXEC
,
3756 .help
= "set vector table entry in mini-ICache, "
3757 "or display current tables",
3758 .usage
= "[('high'|'low') index code]",
3761 .name
= "trace_buffer",
3762 .handler
= xscale_handle_trace_buffer_command
,
3763 .mode
= COMMAND_EXEC
,
3764 .help
= "display trace buffer status, enable or disable "
3765 "tracing, and optionally reconfigure trace mode",
3766 .usage
= "['enable'|'disable' ['fill' number|'wrap']]",
3769 .name
= "dump_trace",
3770 .handler
= xscale_handle_dump_trace_command
,
3771 .mode
= COMMAND_EXEC
,
3772 .help
= "dump content of trace buffer to file",
3773 .usage
= "filename",
3776 .name
= "analyze_trace",
3777 .handler
= xscale_handle_analyze_trace_buffer_command
,
3778 .mode
= COMMAND_EXEC
,
3779 .help
= "analyze content of trace buffer",
3783 .name
= "trace_image",
3784 .handler
= xscale_handle_trace_image_command
,
3785 .mode
= COMMAND_EXEC
,
3786 .help
= "load image from file to address (default 0)",
3787 .usage
= "filename [offset [filetype]]",
3791 .handler
= xscale_handle_cp15
,
3792 .mode
= COMMAND_EXEC
,
3793 .help
= "Read or write coprocessor 15 register.",
3794 .usage
= "register [value]",
3796 COMMAND_REGISTRATION_DONE
3798 static const struct command_registration xscale_any_command_handlers
[] = {
3800 .name
= "debug_handler",
3801 .handler
= xscale_handle_debug_handler_command
,
3802 .mode
= COMMAND_ANY
,
3803 .help
= "Change address used for debug handler.",
3804 .usage
= "target address",
3807 .name
= "cache_clean_address",
3808 .handler
= xscale_handle_cache_clean_address_command
,
3809 .mode
= COMMAND_ANY
,
3810 .help
= "Change address used for cleaning data cache.",
3814 .chain
= xscale_exec_command_handlers
,
3816 COMMAND_REGISTRATION_DONE
3818 static const struct command_registration xscale_command_handlers
[] = {
3820 .chain
= arm_command_handlers
,
3824 .mode
= COMMAND_ANY
,
3825 .help
= "xscale command group",
3826 .chain
= xscale_any_command_handlers
,
3828 COMMAND_REGISTRATION_DONE
3831 struct target_type xscale_target
=
3835 .poll
= xscale_poll
,
3836 .arch_state
= xscale_arch_state
,
3838 .target_request_data
= NULL
,
3840 .halt
= xscale_halt
,
3841 .resume
= xscale_resume
,
3842 .step
= xscale_step
,
3844 .assert_reset
= xscale_assert_reset
,
3845 .deassert_reset
= xscale_deassert_reset
,
3846 .soft_reset_halt
= NULL
,
3848 /* REVISIT on some cores, allow exporting iwmmxt registers ... */
3849 .get_gdb_reg_list
= arm_get_gdb_reg_list
,
3851 .read_memory
= xscale_read_memory
,
3852 .read_phys_memory
= xscale_read_phys_memory
,
3853 .write_memory
= xscale_write_memory
,
3854 .write_phys_memory
= xscale_write_phys_memory
,
3855 .bulk_write_memory
= xscale_bulk_write_memory
,
3857 .checksum_memory
= arm_checksum_memory
,
3858 .blank_check_memory
= arm_blank_check_memory
,
3860 .run_algorithm
= armv4_5_run_algorithm
,
3862 .add_breakpoint
= xscale_add_breakpoint
,
3863 .remove_breakpoint
= xscale_remove_breakpoint
,
3864 .add_watchpoint
= xscale_add_watchpoint
,
3865 .remove_watchpoint
= xscale_remove_watchpoint
,
3867 .commands
= xscale_command_handlers
,
3868 .target_create
= xscale_target_create
,
3869 .init_target
= xscale_init_target
,
3871 .virt2phys
= xscale_virt2phys
,