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 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. *
25 ***************************************************************************/
31 #include "breakpoints.h"
33 #include "target_type.h"
35 #include "arm_simulator.h"
36 #include "arm_disassembler.h"
37 #include <helper/time_support.h>
40 #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.
62 /* forward declarations */
63 static int xscale_resume(struct target *, int current,
64 uint32_t address, int handle_breakpoints, int debug_execution);
65 static int xscale_debug_entry(struct target *);
66 static int xscale_restore_banked(struct target *);
67 static int xscale_get_reg(struct reg *reg);
68 static int xscale_set_reg(struct reg *reg, uint8_t *buf);
69 static int xscale_set_breakpoint(struct target *, struct breakpoint *);
70 static int xscale_set_watchpoint(struct target *, struct watchpoint *);
71 static int xscale_unset_breakpoint(struct target *, struct breakpoint *);
72 static int xscale_read_trace(struct target *);
74 /* This XScale "debug handler" is loaded into the processor's
75 * mini-ICache, which is 2K of code writable only via JTAG.
77 static const uint8_t xscale_debug_handler[] = {
78 #include "xscale_debug.inc"
81 static char *const xscale_reg_list[] = {
82 "XSCALE_MAINID", /* 0 */
92 "XSCALE_IBCR0", /* 10 */
102 "XSCALE_RX", /* 20 */
106 static const struct xscale_reg xscale_reg_arch_info[] = {
107 {XSCALE_MAINID, NULL},
108 {XSCALE_CACHETYPE, NULL},
110 {XSCALE_AUXCTRL, NULL},
116 {XSCALE_CPACCESS, NULL},
117 {XSCALE_IBCR0, NULL},
118 {XSCALE_IBCR1, NULL},
121 {XSCALE_DBCON, NULL},
122 {XSCALE_TBREG, NULL},
123 {XSCALE_CHKPT0, NULL},
124 {XSCALE_CHKPT1, NULL},
125 {XSCALE_DCSR, NULL}, /* DCSR accessed via JTAG or SW */
126 {-1, NULL}, /* TX accessed via JTAG */
127 {-1, NULL}, /* RX accessed via JTAG */
128 {-1, NULL}, /* TXRXCTRL implicit access via JTAG */
131 /* convenience wrapper to access XScale specific registers */
132 static int xscale_set_reg_u32(struct reg *reg, uint32_t value)
136 buf_set_u32(buf, 0, 32, value);
138 return xscale_set_reg(reg, buf);
141 static const char xscale_not[] = "target is not an XScale";
143 static int xscale_verify_pointer(struct command_context *cmd_ctx,
144 struct xscale_common *xscale)
146 if (xscale->common_magic != XSCALE_COMMON_MAGIC) {
147 command_print(cmd_ctx, xscale_not);
148 return ERROR_TARGET_INVALID;
153 static int xscale_jtag_set_instr(struct jtag_tap *tap, uint32_t new_instr, tap_state_t end_state)
157 if (buf_get_u32(tap->cur_instr, 0, tap->ir_length) != new_instr) {
158 struct scan_field field;
161 memset(&field, 0, sizeof field);
162 field.num_bits = tap->ir_length;
163 field.out_value = scratch;
164 buf_set_u32(scratch, 0, field.num_bits, new_instr);
166 jtag_add_ir_scan(tap, &field, end_state);
172 static int xscale_read_dcsr(struct target *target)
174 struct xscale_common *xscale = target_to_xscale(target);
176 struct scan_field fields[3];
177 uint8_t field0 = 0x0;
178 uint8_t field0_check_value = 0x2;
179 uint8_t field0_check_mask = 0x7;
180 uint8_t field2 = 0x0;
181 uint8_t field2_check_value = 0x0;
182 uint8_t field2_check_mask = 0x1;
184 xscale_jtag_set_instr(target->tap,
185 XSCALE_SELDCSR << xscale->xscale_variant,
188 buf_set_u32(&field0, 1, 1, xscale->hold_rst);
189 buf_set_u32(&field0, 2, 1, xscale->external_debug_break);
191 memset(&fields, 0, sizeof fields);
193 fields[0].num_bits = 3;
194 fields[0].out_value = &field0;
196 fields[0].in_value = &tmp;
198 fields[1].num_bits = 32;
199 fields[1].in_value = xscale->reg_cache->reg_list[XSCALE_DCSR].value;
201 fields[2].num_bits = 1;
202 fields[2].out_value = &field2;
204 fields[2].in_value = &tmp2;
206 jtag_add_dr_scan(target->tap, 3, fields, TAP_DRPAUSE);
208 jtag_check_value_mask(fields + 0, &field0_check_value, &field0_check_mask);
209 jtag_check_value_mask(fields + 2, &field2_check_value, &field2_check_mask);
211 retval = jtag_execute_queue();
212 if (retval != ERROR_OK) {
213 LOG_ERROR("JTAG error while reading DCSR");
217 xscale->reg_cache->reg_list[XSCALE_DCSR].dirty = 0;
218 xscale->reg_cache->reg_list[XSCALE_DCSR].valid = 1;
220 /* write the register with the value we just read
221 * on this second pass, only the first bit of field0 is guaranteed to be 0)
223 field0_check_mask = 0x1;
224 fields[1].out_value = xscale->reg_cache->reg_list[XSCALE_DCSR].value;
225 fields[1].in_value = NULL;
227 jtag_add_dr_scan(target->tap, 3, fields, TAP_DRPAUSE);
229 /* DANGER!!! this must be here. It will make sure that the arguments
230 * to jtag_set_check_value() does not go out of scope! */
231 return jtag_execute_queue();
235 static void xscale_getbuf(jtag_callback_data_t arg)
237 uint8_t *in = (uint8_t *)arg;
238 *((uint32_t *)arg) = buf_get_u32(in, 0, 32);
241 static int xscale_receive(struct target *target, uint32_t *buffer, int num_words)
244 return ERROR_COMMAND_SYNTAX_ERROR;
246 struct xscale_common *xscale = target_to_xscale(target);
247 int retval = ERROR_OK;
249 struct scan_field fields[3];
250 uint8_t *field0 = malloc(num_words * 1);
251 uint8_t field0_check_value = 0x2;
252 uint8_t field0_check_mask = 0x6;
253 uint32_t *field1 = malloc(num_words * 4);
254 uint8_t field2_check_value = 0x0;
255 uint8_t field2_check_mask = 0x1;
257 int words_scheduled = 0;
260 path[0] = TAP_DRSELECT;
261 path[1] = TAP_DRCAPTURE;
262 path[2] = TAP_DRSHIFT;
264 memset(&fields, 0, sizeof fields);
266 fields[0].num_bits = 3;
268 fields[0].in_value = &tmp;
269 fields[0].check_value = &field0_check_value;
270 fields[0].check_mask = &field0_check_mask;
272 fields[1].num_bits = 32;
274 fields[2].num_bits = 1;
276 fields[2].in_value = &tmp2;
277 fields[2].check_value = &field2_check_value;
278 fields[2].check_mask = &field2_check_mask;
280 xscale_jtag_set_instr(target->tap,
281 XSCALE_DBGTX << xscale->xscale_variant,
283 jtag_add_runtest(1, TAP_IDLE); /* ensures that we're in the TAP_IDLE state as the above
286 /* repeat until all words have been collected */
288 while (words_done < num_words) {
291 for (i = words_done; i < num_words; i++) {
292 fields[0].in_value = &field0[i];
294 jtag_add_pathmove(3, path);
296 fields[1].in_value = (uint8_t *)(field1 + i);
298 jtag_add_dr_scan_check(target->tap, 3, fields, TAP_IDLE);
300 jtag_add_callback(xscale_getbuf, (jtag_callback_data_t)(field1 + i));
305 retval = jtag_execute_queue();
306 if (retval != ERROR_OK) {
307 LOG_ERROR("JTAG error while receiving data from debug handler");
311 /* examine results */
312 for (i = words_done; i < num_words; i++) {
313 if (!(field0[i] & 1)) {
314 /* move backwards if necessary */
316 for (j = i; j < num_words - 1; j++) {
317 field0[j] = field0[j + 1];
318 field1[j] = field1[j + 1];
323 if (words_scheduled == 0) {
324 if (attempts++ == 1000) {
326 "Failed to receiving data from debug handler after 1000 attempts");
327 retval = ERROR_TARGET_TIMEOUT;
332 words_done += words_scheduled;
335 for (i = 0; i < num_words; i++)
336 *(buffer++) = buf_get_u32((uint8_t *)&field1[i], 0, 32);
343 static int xscale_read_tx(struct target *target, int consume)
345 struct xscale_common *xscale = target_to_xscale(target);
347 tap_state_t noconsume_path[6];
349 struct timeval timeout, now;
350 struct scan_field fields[3];
351 uint8_t field0_in = 0x0;
352 uint8_t field0_check_value = 0x2;
353 uint8_t field0_check_mask = 0x6;
354 uint8_t field2_check_value = 0x0;
355 uint8_t field2_check_mask = 0x1;
357 xscale_jtag_set_instr(target->tap,
358 XSCALE_DBGTX << xscale->xscale_variant,
361 path[0] = TAP_DRSELECT;
362 path[1] = TAP_DRCAPTURE;
363 path[2] = TAP_DRSHIFT;
365 noconsume_path[0] = TAP_DRSELECT;
366 noconsume_path[1] = TAP_DRCAPTURE;
367 noconsume_path[2] = TAP_DREXIT1;
368 noconsume_path[3] = TAP_DRPAUSE;
369 noconsume_path[4] = TAP_DREXIT2;
370 noconsume_path[5] = TAP_DRSHIFT;
372 memset(&fields, 0, sizeof fields);
374 fields[0].num_bits = 3;
375 fields[0].in_value = &field0_in;
377 fields[1].num_bits = 32;
378 fields[1].in_value = xscale->reg_cache->reg_list[XSCALE_TX].value;
380 fields[2].num_bits = 1;
382 fields[2].in_value = &tmp;
384 gettimeofday(&timeout, NULL);
385 timeval_add_time(&timeout, 1, 0);
388 /* if we want to consume the register content (i.e. clear TX_READY),
389 * we have to go straight from Capture-DR to Shift-DR
390 * otherwise, we go from Capture-DR to Exit1-DR to Pause-DR
393 jtag_add_pathmove(3, path);
395 jtag_add_pathmove(ARRAY_SIZE(noconsume_path), noconsume_path);
397 jtag_add_dr_scan(target->tap, 3, fields, TAP_IDLE);
399 jtag_check_value_mask(fields + 0, &field0_check_value, &field0_check_mask);
400 jtag_check_value_mask(fields + 2, &field2_check_value, &field2_check_mask);
402 retval = jtag_execute_queue();
403 if (retval != ERROR_OK) {
404 LOG_ERROR("JTAG error while reading TX");
405 return ERROR_TARGET_TIMEOUT;
408 gettimeofday(&now, NULL);
409 if ((now.tv_sec > timeout.tv_sec) ||
410 ((now.tv_sec == timeout.tv_sec) && (now.tv_usec > timeout.tv_usec))) {
411 LOG_ERROR("time out reading TX register");
412 return ERROR_TARGET_TIMEOUT;
414 if (!((!(field0_in & 1)) && consume))
416 if (debug_level >= 3) {
417 LOG_DEBUG("waiting 100ms");
418 alive_sleep(100); /* avoid flooding the logs */
424 if (!(field0_in & 1))
425 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
430 static int xscale_write_rx(struct target *target)
432 struct xscale_common *xscale = target_to_xscale(target);
434 struct timeval timeout, now;
435 struct scan_field fields[3];
436 uint8_t field0_out = 0x0;
437 uint8_t field0_in = 0x0;
438 uint8_t field0_check_value = 0x2;
439 uint8_t field0_check_mask = 0x6;
440 uint8_t field2 = 0x0;
441 uint8_t field2_check_value = 0x0;
442 uint8_t field2_check_mask = 0x1;
444 xscale_jtag_set_instr(target->tap,
445 XSCALE_DBGRX << xscale->xscale_variant,
448 memset(&fields, 0, sizeof fields);
450 fields[0].num_bits = 3;
451 fields[0].out_value = &field0_out;
452 fields[0].in_value = &field0_in;
454 fields[1].num_bits = 32;
455 fields[1].out_value = xscale->reg_cache->reg_list[XSCALE_RX].value;
457 fields[2].num_bits = 1;
458 fields[2].out_value = &field2;
460 fields[2].in_value = &tmp;
462 gettimeofday(&timeout, NULL);
463 timeval_add_time(&timeout, 1, 0);
465 /* poll until rx_read is low */
466 LOG_DEBUG("polling RX");
468 jtag_add_dr_scan(target->tap, 3, fields, TAP_IDLE);
470 jtag_check_value_mask(fields + 0, &field0_check_value, &field0_check_mask);
471 jtag_check_value_mask(fields + 2, &field2_check_value, &field2_check_mask);
473 retval = jtag_execute_queue();
474 if (retval != ERROR_OK) {
475 LOG_ERROR("JTAG error while writing RX");
479 gettimeofday(&now, NULL);
480 if ((now.tv_sec > timeout.tv_sec) ||
481 ((now.tv_sec == timeout.tv_sec) && (now.tv_usec > timeout.tv_usec))) {
482 LOG_ERROR("time out writing RX register");
483 return ERROR_TARGET_TIMEOUT;
485 if (!(field0_in & 1))
487 if (debug_level >= 3) {
488 LOG_DEBUG("waiting 100ms");
489 alive_sleep(100); /* avoid flooding the logs */
497 jtag_add_dr_scan(target->tap, 3, fields, TAP_IDLE);
499 retval = jtag_execute_queue();
500 if (retval != ERROR_OK) {
501 LOG_ERROR("JTAG error while writing RX");
508 /* send count elements of size byte to the debug handler */
509 static int xscale_send(struct target *target, const uint8_t *buffer, int count, int size)
511 struct xscale_common *xscale = target_to_xscale(target);
515 xscale_jtag_set_instr(target->tap,
516 XSCALE_DBGRX << xscale->xscale_variant,
519 static const uint8_t t0;
521 static const uint8_t t2 = 1;
522 struct scan_field fields[3] = {
523 { .num_bits = 3, .out_value = &t0 },
524 { .num_bits = 32, .out_value = t1 },
525 { .num_bits = 1, .out_value = &t2 },
528 int endianness = target->endianness;
529 while (done_count++ < count) {
534 if (endianness == TARGET_LITTLE_ENDIAN)
535 t = le_to_h_u32(buffer);
537 t = be_to_h_u32(buffer);
540 if (endianness == TARGET_LITTLE_ENDIAN)
541 t = le_to_h_u16(buffer);
543 t = be_to_h_u16(buffer);
549 LOG_ERROR("BUG: size neither 4, 2 nor 1");
550 return ERROR_COMMAND_SYNTAX_ERROR;
553 buf_set_u32(t1, 0, 32, t);
555 jtag_add_dr_scan(target->tap,
562 retval = jtag_execute_queue();
563 if (retval != ERROR_OK) {
564 LOG_ERROR("JTAG error while sending data to debug handler");
571 static int xscale_send_u32(struct target *target, uint32_t value)
573 struct xscale_common *xscale = target_to_xscale(target);
575 buf_set_u32(xscale->reg_cache->reg_list[XSCALE_RX].value, 0, 32, value);
576 return xscale_write_rx(target);
579 static int xscale_write_dcsr(struct target *target, int hold_rst, int ext_dbg_brk)
581 struct xscale_common *xscale = target_to_xscale(target);
583 struct scan_field fields[3];
584 uint8_t field0 = 0x0;
585 uint8_t field0_check_value = 0x2;
586 uint8_t field0_check_mask = 0x7;
587 uint8_t field2 = 0x0;
588 uint8_t field2_check_value = 0x0;
589 uint8_t field2_check_mask = 0x1;
592 xscale->hold_rst = hold_rst;
594 if (ext_dbg_brk != -1)
595 xscale->external_debug_break = ext_dbg_brk;
597 xscale_jtag_set_instr(target->tap,
598 XSCALE_SELDCSR << xscale->xscale_variant,
601 buf_set_u32(&field0, 1, 1, xscale->hold_rst);
602 buf_set_u32(&field0, 2, 1, xscale->external_debug_break);
604 memset(&fields, 0, sizeof fields);
606 fields[0].num_bits = 3;
607 fields[0].out_value = &field0;
609 fields[0].in_value = &tmp;
611 fields[1].num_bits = 32;
612 fields[1].out_value = xscale->reg_cache->reg_list[XSCALE_DCSR].value;
614 fields[2].num_bits = 1;
615 fields[2].out_value = &field2;
617 fields[2].in_value = &tmp2;
619 jtag_add_dr_scan(target->tap, 3, fields, TAP_IDLE);
621 jtag_check_value_mask(fields + 0, &field0_check_value, &field0_check_mask);
622 jtag_check_value_mask(fields + 2, &field2_check_value, &field2_check_mask);
624 retval = jtag_execute_queue();
625 if (retval != ERROR_OK) {
626 LOG_ERROR("JTAG error while writing DCSR");
630 xscale->reg_cache->reg_list[XSCALE_DCSR].dirty = 0;
631 xscale->reg_cache->reg_list[XSCALE_DCSR].valid = 1;
636 /* parity of the number of bits 0 if even; 1 if odd. for 32 bit words */
637 static unsigned int parity(unsigned int v)
639 /* unsigned int ov = v; */
644 /* LOG_DEBUG("parity of 0x%x is %i", ov, (0x6996 >> v) & 1); */
645 return (0x6996 >> v) & 1;
648 static int xscale_load_ic(struct target *target, uint32_t va, uint32_t buffer[8])
650 struct xscale_common *xscale = target_to_xscale(target);
654 struct scan_field fields[2];
656 LOG_DEBUG("loading miniIC at 0x%8.8" PRIx32 "", va);
659 xscale_jtag_set_instr(target->tap,
660 XSCALE_LDIC << xscale->xscale_variant,
663 /* CMD is b011 to load a cacheline into the Mini ICache.
664 * Loading into the main ICache is deprecated, and unused.
665 * It's followed by three zero bits, and 27 address bits.
667 buf_set_u32(&cmd, 0, 6, 0x3);
669 /* virtual address of desired cache line */
670 buf_set_u32(packet, 0, 27, va >> 5);
672 memset(&fields, 0, sizeof fields);
674 fields[0].num_bits = 6;
675 fields[0].out_value = &cmd;
677 fields[1].num_bits = 27;
678 fields[1].out_value = packet;
680 jtag_add_dr_scan(target->tap, 2, fields, TAP_IDLE);
682 /* rest of packet is a cacheline: 8 instructions, with parity */
683 fields[0].num_bits = 32;
684 fields[0].out_value = packet;
686 fields[1].num_bits = 1;
687 fields[1].out_value = &cmd;
689 for (word = 0; word < 8; word++) {
690 buf_set_u32(packet, 0, 32, buffer[word]);
693 memcpy(&value, packet, sizeof(uint32_t));
696 jtag_add_dr_scan(target->tap, 2, fields, TAP_IDLE);
699 return jtag_execute_queue();
702 static int xscale_invalidate_ic_line(struct target *target, uint32_t va)
704 struct xscale_common *xscale = target_to_xscale(target);
707 struct scan_field fields[2];
709 xscale_jtag_set_instr(target->tap,
710 XSCALE_LDIC << xscale->xscale_variant,
713 /* CMD for invalidate IC line b000, bits [6:4] b000 */
714 buf_set_u32(&cmd, 0, 6, 0x0);
716 /* virtual address of desired cache line */
717 buf_set_u32(packet, 0, 27, va >> 5);
719 memset(&fields, 0, sizeof fields);
721 fields[0].num_bits = 6;
722 fields[0].out_value = &cmd;
724 fields[1].num_bits = 27;
725 fields[1].out_value = packet;
727 jtag_add_dr_scan(target->tap, 2, fields, TAP_IDLE);
732 static int xscale_update_vectors(struct target *target)
734 struct xscale_common *xscale = target_to_xscale(target);
738 uint32_t low_reset_branch, high_reset_branch;
740 for (i = 1; i < 8; i++) {
741 /* if there's a static vector specified for this exception, override */
742 if (xscale->static_high_vectors_set & (1 << i))
743 xscale->high_vectors[i] = xscale->static_high_vectors[i];
745 retval = target_read_u32(target, 0xffff0000 + 4*i, &xscale->high_vectors[i]);
746 if (retval == ERROR_TARGET_TIMEOUT)
748 if (retval != ERROR_OK) {
749 /* Some of these reads will fail as part of normal execution */
750 xscale->high_vectors[i] = ARMV4_5_B(0xfffffe, 0);
755 for (i = 1; i < 8; i++) {
756 if (xscale->static_low_vectors_set & (1 << i))
757 xscale->low_vectors[i] = xscale->static_low_vectors[i];
759 retval = target_read_u32(target, 0x0 + 4*i, &xscale->low_vectors[i]);
760 if (retval == ERROR_TARGET_TIMEOUT)
762 if (retval != ERROR_OK) {
763 /* Some of these reads will fail as part of normal execution */
764 xscale->low_vectors[i] = ARMV4_5_B(0xfffffe, 0);
769 /* calculate branches to debug handler */
770 low_reset_branch = (xscale->handler_address + 0x20 - 0x0 - 0x8) >> 2;
771 high_reset_branch = (xscale->handler_address + 0x20 - 0xffff0000 - 0x8) >> 2;
773 xscale->low_vectors[0] = ARMV4_5_B((low_reset_branch & 0xffffff), 0);
774 xscale->high_vectors[0] = ARMV4_5_B((high_reset_branch & 0xffffff), 0);
776 /* invalidate and load exception vectors in mini i-cache */
777 xscale_invalidate_ic_line(target, 0x0);
778 xscale_invalidate_ic_line(target, 0xffff0000);
780 xscale_load_ic(target, 0x0, xscale->low_vectors);
781 xscale_load_ic(target, 0xffff0000, xscale->high_vectors);
786 static int xscale_arch_state(struct target *target)
788 struct xscale_common *xscale = target_to_xscale(target);
789 struct arm *arm = &xscale->arm;
791 static const char *state[] = {
792 "disabled", "enabled"
795 static const char *arch_dbg_reason[] = {
796 "", "\n(processor reset)", "\n(trace buffer full)"
799 if (arm->common_magic != ARM_COMMON_MAGIC) {
800 LOG_ERROR("BUG: called for a non-ARMv4/5 target");
801 return ERROR_COMMAND_SYNTAX_ERROR;
804 arm_arch_state(target);
805 LOG_USER("MMU: %s, D-Cache: %s, I-Cache: %s%s",
806 state[xscale->armv4_5_mmu.mmu_enabled],
807 state[xscale->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled],
808 state[xscale->armv4_5_mmu.armv4_5_cache.i_cache_enabled],
809 arch_dbg_reason[xscale->arch_debug_reason]);
814 static int xscale_poll(struct target *target)
816 int retval = ERROR_OK;
818 if ((target->state == TARGET_RUNNING) || (target->state == TARGET_DEBUG_RUNNING)) {
819 enum target_state previous_state = target->state;
820 retval = xscale_read_tx(target, 0);
821 if (retval == ERROR_OK) {
823 /* there's data to read from the tx register, we entered debug state */
824 target->state = TARGET_HALTED;
826 /* process debug entry, fetching current mode regs */
827 retval = xscale_debug_entry(target);
828 } else if (retval != ERROR_TARGET_RESOURCE_NOT_AVAILABLE) {
829 LOG_USER("error while polling TX register, reset CPU");
830 /* here we "lie" so GDB won't get stuck and a reset can be perfomed */
831 target->state = TARGET_HALTED;
834 /* debug_entry could have overwritten target state (i.e. immediate resume)
835 * don't signal event handlers in that case
837 if (target->state != TARGET_HALTED)
840 /* if target was running, signal that we halted
841 * otherwise we reentered from debug execution */
842 if (previous_state == TARGET_RUNNING)
843 target_call_event_callbacks(target, TARGET_EVENT_HALTED);
845 target_call_event_callbacks(target, TARGET_EVENT_DEBUG_HALTED);
851 static int xscale_debug_entry(struct target *target)
853 struct xscale_common *xscale = target_to_xscale(target);
854 struct arm *arm = &xscale->arm;
861 /* clear external dbg break (will be written on next DCSR read) */
862 xscale->external_debug_break = 0;
863 retval = xscale_read_dcsr(target);
864 if (retval != ERROR_OK)
867 /* get r0, pc, r1 to r7 and cpsr */
868 retval = xscale_receive(target, buffer, 10);
869 if (retval != ERROR_OK)
872 /* move r0 from buffer to register cache */
873 buf_set_u32(arm->core_cache->reg_list[0].value, 0, 32, buffer[0]);
874 arm->core_cache->reg_list[0].dirty = 1;
875 arm->core_cache->reg_list[0].valid = 1;
876 LOG_DEBUG("r0: 0x%8.8" PRIx32 "", buffer[0]);
878 /* move pc from buffer to register cache */
879 buf_set_u32(arm->pc->value, 0, 32, buffer[1]);
882 LOG_DEBUG("pc: 0x%8.8" PRIx32 "", buffer[1]);
884 /* move data from buffer to register cache */
885 for (i = 1; i <= 7; i++) {
886 buf_set_u32(arm->core_cache->reg_list[i].value, 0, 32, buffer[1 + i]);
887 arm->core_cache->reg_list[i].dirty = 1;
888 arm->core_cache->reg_list[i].valid = 1;
889 LOG_DEBUG("r%i: 0x%8.8" PRIx32 "", i, buffer[i + 1]);
892 arm_set_cpsr(arm, buffer[9]);
893 LOG_DEBUG("cpsr: 0x%8.8" PRIx32 "", buffer[9]);
895 if (!is_arm_mode(arm->core_mode)) {
896 target->state = TARGET_UNKNOWN;
897 LOG_ERROR("cpsr contains invalid mode value - communication failure");
898 return ERROR_TARGET_FAILURE;
900 LOG_DEBUG("target entered debug state in %s mode",
901 arm_mode_name(arm->core_mode));
903 /* get banked registers, r8 to r14, and spsr if not in USR/SYS mode */
905 xscale_receive(target, buffer, 8);
906 buf_set_u32(arm->spsr->value, 0, 32, buffer[7]);
907 arm->spsr->dirty = false;
908 arm->spsr->valid = true;
910 /* r8 to r14, but no spsr */
911 xscale_receive(target, buffer, 7);
914 /* move data from buffer to right banked register in cache */
915 for (i = 8; i <= 14; i++) {
916 struct reg *r = arm_reg_current(arm, i);
918 buf_set_u32(r->value, 0, 32, buffer[i - 8]);
923 /* mark xscale regs invalid to ensure they are retrieved from the
924 * debug handler if requested */
925 for (i = 0; i < xscale->reg_cache->num_regs; i++)
926 xscale->reg_cache->reg_list[i].valid = 0;
928 /* examine debug reason */
929 xscale_read_dcsr(target);
930 moe = buf_get_u32(xscale->reg_cache->reg_list[XSCALE_DCSR].value, 2, 3);
932 /* stored PC (for calculating fixup) */
933 pc = buf_get_u32(arm->pc->value, 0, 32);
936 case 0x0: /* Processor reset */
937 target->debug_reason = DBG_REASON_DBGRQ;
938 xscale->arch_debug_reason = XSCALE_DBG_REASON_RESET;
941 case 0x1: /* Instruction breakpoint hit */
942 target->debug_reason = DBG_REASON_BREAKPOINT;
943 xscale->arch_debug_reason = XSCALE_DBG_REASON_GENERIC;
946 case 0x2: /* Data breakpoint hit */
947 target->debug_reason = DBG_REASON_WATCHPOINT;
948 xscale->arch_debug_reason = XSCALE_DBG_REASON_GENERIC;
951 case 0x3: /* BKPT instruction executed */
952 target->debug_reason = DBG_REASON_BREAKPOINT;
953 xscale->arch_debug_reason = XSCALE_DBG_REASON_GENERIC;
956 case 0x4: /* Ext. debug event */
957 target->debug_reason = DBG_REASON_DBGRQ;
958 xscale->arch_debug_reason = XSCALE_DBG_REASON_GENERIC;
961 case 0x5: /* Vector trap occured */
962 target->debug_reason = DBG_REASON_BREAKPOINT;
963 xscale->arch_debug_reason = XSCALE_DBG_REASON_GENERIC;
966 case 0x6: /* Trace buffer full break */
967 target->debug_reason = DBG_REASON_DBGRQ;
968 xscale->arch_debug_reason = XSCALE_DBG_REASON_TB_FULL;
971 case 0x7: /* Reserved (may flag Hot-Debug support) */
973 LOG_ERROR("Method of Entry is 'Reserved'");
979 buf_set_u32(arm->pc->value, 0, 32, pc);
981 /* on the first debug entry, identify cache type */
982 if (xscale->armv4_5_mmu.armv4_5_cache.ctype == -1) {
983 uint32_t cache_type_reg;
985 /* read cp15 cache type register */
986 xscale_get_reg(&xscale->reg_cache->reg_list[XSCALE_CACHETYPE]);
987 cache_type_reg = buf_get_u32(xscale->reg_cache->reg_list[XSCALE_CACHETYPE].value,
991 armv4_5_identify_cache(cache_type_reg, &xscale->armv4_5_mmu.armv4_5_cache);
994 /* examine MMU and Cache settings
995 * read cp15 control register */
996 xscale_get_reg(&xscale->reg_cache->reg_list[XSCALE_CTRL]);
997 xscale->cp15_control_reg =
998 buf_get_u32(xscale->reg_cache->reg_list[XSCALE_CTRL].value, 0, 32);
999 xscale->armv4_5_mmu.mmu_enabled = (xscale->cp15_control_reg & 0x1U) ? 1 : 0;
1000 xscale->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled =
1001 (xscale->cp15_control_reg & 0x4U) ? 1 : 0;
1002 xscale->armv4_5_mmu.armv4_5_cache.i_cache_enabled =
1003 (xscale->cp15_control_reg & 0x1000U) ? 1 : 0;
1005 /* tracing enabled, read collected trace data */
1006 if (xscale->trace.mode != XSCALE_TRACE_DISABLED) {
1007 xscale_read_trace(target);
1009 /* Resume if entered debug due to buffer fill and we're still collecting
1010 * trace data. Note that a debug exception due to trace buffer full
1011 * can only happen in fill mode. */
1012 if (xscale->arch_debug_reason == XSCALE_DBG_REASON_TB_FULL) {
1013 if (--xscale->trace.fill_counter > 0)
1014 xscale_resume(target, 1, 0x0, 1, 0);
1015 } else /* entered debug for other reason; reset counter */
1016 xscale->trace.fill_counter = 0;
1022 static int xscale_halt(struct target *target)
1024 struct xscale_common *xscale = target_to_xscale(target);
1026 LOG_DEBUG("target->state: %s",
1027 target_state_name(target));
1029 if (target->state == TARGET_HALTED) {
1030 LOG_DEBUG("target was already halted");
1032 } else if (target->state == TARGET_UNKNOWN) {
1033 /* this must not happen for a xscale target */
1034 LOG_ERROR("target was in unknown state when halt was requested");
1035 return ERROR_TARGET_INVALID;
1036 } else if (target->state == TARGET_RESET)
1037 LOG_DEBUG("target->state == TARGET_RESET");
1039 /* assert external dbg break */
1040 xscale->external_debug_break = 1;
1041 xscale_read_dcsr(target);
1043 target->debug_reason = DBG_REASON_DBGRQ;
1049 static int xscale_enable_single_step(struct target *target, uint32_t next_pc)
1051 struct xscale_common *xscale = target_to_xscale(target);
1052 struct reg *ibcr0 = &xscale->reg_cache->reg_list[XSCALE_IBCR0];
1055 if (xscale->ibcr0_used) {
1056 struct breakpoint *ibcr0_bp =
1057 breakpoint_find(target, buf_get_u32(ibcr0->value, 0, 32) & 0xfffffffe);
1060 xscale_unset_breakpoint(target, ibcr0_bp);
1063 "BUG: xscale->ibcr0_used is set, but no breakpoint with that address found");
1068 retval = xscale_set_reg_u32(ibcr0, next_pc | 0x1);
1069 if (retval != ERROR_OK)
1075 static int xscale_disable_single_step(struct target *target)
1077 struct xscale_common *xscale = target_to_xscale(target);
1078 struct reg *ibcr0 = &xscale->reg_cache->reg_list[XSCALE_IBCR0];
1081 retval = xscale_set_reg_u32(ibcr0, 0x0);
1082 if (retval != ERROR_OK)
1088 static void xscale_enable_watchpoints(struct target *target)
1090 struct watchpoint *watchpoint = target->watchpoints;
1092 while (watchpoint) {
1093 if (watchpoint->set == 0)
1094 xscale_set_watchpoint(target, watchpoint);
1095 watchpoint = watchpoint->next;
1099 static void xscale_enable_breakpoints(struct target *target)
1101 struct breakpoint *breakpoint = target->breakpoints;
1103 /* set any pending breakpoints */
1104 while (breakpoint) {
1105 if (breakpoint->set == 0)
1106 xscale_set_breakpoint(target, breakpoint);
1107 breakpoint = breakpoint->next;
1111 static void xscale_free_trace_data(struct xscale_common *xscale)
1113 struct xscale_trace_data *td = xscale->trace.data;
1115 struct xscale_trace_data *next_td = td->next;
1121 xscale->trace.data = NULL;
1124 static int xscale_resume(struct target *target, int current,
1125 uint32_t address, int handle_breakpoints, int debug_execution)
1127 struct xscale_common *xscale = target_to_xscale(target);
1128 struct arm *arm = &xscale->arm;
1129 uint32_t current_pc;
1135 if (target->state != TARGET_HALTED) {
1136 LOG_WARNING("target not halted");
1137 return ERROR_TARGET_NOT_HALTED;
1140 if (!debug_execution)
1141 target_free_all_working_areas(target);
1143 /* update vector tables */
1144 retval = xscale_update_vectors(target);
1145 if (retval != ERROR_OK)
1148 /* current = 1: continue on current pc, otherwise continue at <address> */
1150 buf_set_u32(arm->pc->value, 0, 32, address);
1152 current_pc = buf_get_u32(arm->pc->value, 0, 32);
1154 /* if we're at the reset vector, we have to simulate the branch */
1155 if (current_pc == 0x0) {
1156 arm_simulate_step(target, NULL);
1157 current_pc = buf_get_u32(arm->pc->value, 0, 32);
1160 /* the front-end may request us not to handle breakpoints */
1161 if (handle_breakpoints) {
1162 struct breakpoint *breakpoint;
1163 breakpoint = breakpoint_find(target,
1164 buf_get_u32(arm->pc->value, 0, 32));
1165 if (breakpoint != NULL) {
1167 enum trace_mode saved_trace_mode;
1169 /* there's a breakpoint at the current PC, we have to step over it */
1170 LOG_DEBUG("unset breakpoint at 0x%8.8" PRIx32 "", breakpoint->address);
1171 xscale_unset_breakpoint(target, breakpoint);
1173 /* calculate PC of next instruction */
1174 retval = arm_simulate_step(target, &next_pc);
1175 if (retval != ERROR_OK) {
1176 uint32_t current_opcode;
1177 target_read_u32(target, current_pc, ¤t_opcode);
1179 "BUG: couldn't calculate PC of next instruction, current opcode was 0x%8.8" PRIx32 "",
1183 LOG_DEBUG("enable single-step");
1184 xscale_enable_single_step(target, next_pc);
1186 /* restore banked registers */
1187 retval = xscale_restore_banked(target);
1188 if (retval != ERROR_OK)
1191 /* send resume request */
1192 xscale_send_u32(target, 0x30);
1195 xscale_send_u32(target,
1196 buf_get_u32(arm->cpsr->value, 0, 32));
1197 LOG_DEBUG("writing cpsr with value 0x%8.8" PRIx32,
1198 buf_get_u32(arm->cpsr->value, 0, 32));
1200 for (i = 7; i >= 0; i--) {
1202 xscale_send_u32(target,
1203 buf_get_u32(arm->core_cache->reg_list[i].value, 0, 32));
1204 LOG_DEBUG("writing r%i with value 0x%8.8" PRIx32 "",
1205 i, buf_get_u32(arm->core_cache->reg_list[i].value, 0, 32));
1209 xscale_send_u32(target,
1210 buf_get_u32(arm->pc->value, 0, 32));
1211 LOG_DEBUG("writing PC with value 0x%8.8" PRIx32,
1212 buf_get_u32(arm->pc->value, 0, 32));
1214 /* disable trace data collection in xscale_debug_entry() */
1215 saved_trace_mode = xscale->trace.mode;
1216 xscale->trace.mode = XSCALE_TRACE_DISABLED;
1218 /* wait for and process debug entry */
1219 xscale_debug_entry(target);
1221 /* re-enable trace buffer, if enabled previously */
1222 xscale->trace.mode = saved_trace_mode;
1224 LOG_DEBUG("disable single-step");
1225 xscale_disable_single_step(target);
1227 LOG_DEBUG("set breakpoint at 0x%8.8" PRIx32 "", breakpoint->address);
1228 xscale_set_breakpoint(target, breakpoint);
1232 /* enable any pending breakpoints and watchpoints */
1233 xscale_enable_breakpoints(target);
1234 xscale_enable_watchpoints(target);
1236 /* restore banked registers */
1237 retval = xscale_restore_banked(target);
1238 if (retval != ERROR_OK)
1241 /* send resume request (command 0x30 or 0x31)
1242 * clean the trace buffer if it is to be enabled (0x62) */
1243 if (xscale->trace.mode != XSCALE_TRACE_DISABLED) {
1244 if (xscale->trace.mode == XSCALE_TRACE_FILL) {
1245 /* If trace enabled in fill mode and starting collection of new set
1246 * of buffers, initialize buffer counter and free previous buffers */
1247 if (xscale->trace.fill_counter == 0) {
1248 xscale->trace.fill_counter = xscale->trace.buffer_fill;
1249 xscale_free_trace_data(xscale);
1251 } else /* wrap mode; free previous buffer */
1252 xscale_free_trace_data(xscale);
1254 xscale_send_u32(target, 0x62);
1255 xscale_send_u32(target, 0x31);
1257 xscale_send_u32(target, 0x30);
1260 xscale_send_u32(target, buf_get_u32(arm->cpsr->value, 0, 32));
1261 LOG_DEBUG("writing cpsr with value 0x%8.8" PRIx32,
1262 buf_get_u32(arm->cpsr->value, 0, 32));
1264 for (i = 7; i >= 0; i--) {
1266 xscale_send_u32(target, buf_get_u32(arm->core_cache->reg_list[i].value, 0, 32));
1267 LOG_DEBUG("writing r%i with value 0x%8.8" PRIx32 "",
1268 i, buf_get_u32(arm->core_cache->reg_list[i].value, 0, 32));
1272 xscale_send_u32(target, buf_get_u32(arm->pc->value, 0, 32));
1273 LOG_DEBUG("wrote PC with value 0x%8.8" PRIx32,
1274 buf_get_u32(arm->pc->value, 0, 32));
1276 target->debug_reason = DBG_REASON_NOTHALTED;
1278 if (!debug_execution) {
1279 /* registers are now invalid */
1280 register_cache_invalidate(arm->core_cache);
1281 target->state = TARGET_RUNNING;
1282 target_call_event_callbacks(target, TARGET_EVENT_RESUMED);
1284 target->state = TARGET_DEBUG_RUNNING;
1285 target_call_event_callbacks(target, TARGET_EVENT_DEBUG_RESUMED);
1288 LOG_DEBUG("target resumed");
1293 static int xscale_step_inner(struct target *target, int current,
1294 uint32_t address, int handle_breakpoints)
1296 struct xscale_common *xscale = target_to_xscale(target);
1297 struct arm *arm = &xscale->arm;
1302 target->debug_reason = DBG_REASON_SINGLESTEP;
1304 /* calculate PC of next instruction */
1305 retval = arm_simulate_step(target, &next_pc);
1306 if (retval != ERROR_OK) {
1307 uint32_t current_opcode, current_pc;
1308 current_pc = buf_get_u32(arm->pc->value, 0, 32);
1310 target_read_u32(target, current_pc, ¤t_opcode);
1312 "BUG: couldn't calculate PC of next instruction, current opcode was 0x%8.8" PRIx32 "",
1317 LOG_DEBUG("enable single-step");
1318 retval = xscale_enable_single_step(target, next_pc);
1319 if (retval != ERROR_OK)
1322 /* restore banked registers */
1323 retval = xscale_restore_banked(target);
1324 if (retval != ERROR_OK)
1327 /* send resume request (command 0x30 or 0x31)
1328 * clean the trace buffer if it is to be enabled (0x62) */
1329 if (xscale->trace.mode != XSCALE_TRACE_DISABLED) {
1330 retval = xscale_send_u32(target, 0x62);
1331 if (retval != ERROR_OK)
1333 retval = xscale_send_u32(target, 0x31);
1334 if (retval != ERROR_OK)
1337 retval = xscale_send_u32(target, 0x30);
1338 if (retval != ERROR_OK)
1343 retval = xscale_send_u32(target,
1344 buf_get_u32(arm->cpsr->value, 0, 32));
1345 if (retval != ERROR_OK)
1347 LOG_DEBUG("writing cpsr with value 0x%8.8" PRIx32,
1348 buf_get_u32(arm->cpsr->value, 0, 32));
1350 for (i = 7; i >= 0; i--) {
1352 retval = xscale_send_u32(target,
1353 buf_get_u32(arm->core_cache->reg_list[i].value, 0, 32));
1354 if (retval != ERROR_OK)
1356 LOG_DEBUG("writing r%i with value 0x%8.8" PRIx32 "", i,
1357 buf_get_u32(arm->core_cache->reg_list[i].value, 0, 32));
1361 retval = xscale_send_u32(target,
1362 buf_get_u32(arm->pc->value, 0, 32));
1363 if (retval != ERROR_OK)
1365 LOG_DEBUG("wrote PC with value 0x%8.8" PRIx32,
1366 buf_get_u32(arm->pc->value, 0, 32));
1368 target_call_event_callbacks(target, TARGET_EVENT_RESUMED);
1370 /* registers are now invalid */
1371 register_cache_invalidate(arm->core_cache);
1373 /* wait for and process debug entry */
1374 retval = xscale_debug_entry(target);
1375 if (retval != ERROR_OK)
1378 LOG_DEBUG("disable single-step");
1379 retval = xscale_disable_single_step(target);
1380 if (retval != ERROR_OK)
1383 target_call_event_callbacks(target, TARGET_EVENT_HALTED);
1388 static int xscale_step(struct target *target, int current,
1389 uint32_t address, int handle_breakpoints)
1391 struct arm *arm = target_to_arm(target);
1392 struct breakpoint *breakpoint = NULL;
1394 uint32_t current_pc;
1397 if (target->state != TARGET_HALTED) {
1398 LOG_WARNING("target not halted");
1399 return ERROR_TARGET_NOT_HALTED;
1402 /* current = 1: continue on current pc, otherwise continue at <address> */
1404 buf_set_u32(arm->pc->value, 0, 32, address);
1406 current_pc = buf_get_u32(arm->pc->value, 0, 32);
1408 /* if we're at the reset vector, we have to simulate the step */
1409 if (current_pc == 0x0) {
1410 retval = arm_simulate_step(target, NULL);
1411 if (retval != ERROR_OK)
1413 current_pc = buf_get_u32(arm->pc->value, 0, 32);
1414 LOG_DEBUG("current pc %" PRIx32, current_pc);
1416 target->debug_reason = DBG_REASON_SINGLESTEP;
1417 target_call_event_callbacks(target, TARGET_EVENT_HALTED);
1422 /* the front-end may request us not to handle breakpoints */
1423 if (handle_breakpoints)
1424 breakpoint = breakpoint_find(target,
1425 buf_get_u32(arm->pc->value, 0, 32));
1426 if (breakpoint != NULL) {
1427 retval = xscale_unset_breakpoint(target, breakpoint);
1428 if (retval != ERROR_OK)
1432 retval = xscale_step_inner(target, current, address, handle_breakpoints);
1433 if (retval != ERROR_OK)
1437 xscale_set_breakpoint(target, breakpoint);
1439 LOG_DEBUG("target stepped");
1445 static int xscale_assert_reset(struct target *target)
1447 struct xscale_common *xscale = target_to_xscale(target);
1449 LOG_DEBUG("target->state: %s",
1450 target_state_name(target));
1453 jtag_add_reset(0, 1);
1455 /* sleep 1ms, to be sure we fulfill any requirements */
1456 jtag_add_sleep(1000);
1457 jtag_execute_queue();
1459 /* select DCSR instruction (set endstate to R-T-I to ensure we don't
1460 * end up in T-L-R, which would reset JTAG
1462 xscale_jtag_set_instr(target->tap,
1463 XSCALE_SELDCSR << xscale->xscale_variant,
1466 /* set Hold reset, Halt mode and Trap Reset */
1467 buf_set_u32(xscale->reg_cache->reg_list[XSCALE_DCSR].value, 30, 1, 0x1);
1468 buf_set_u32(xscale->reg_cache->reg_list[XSCALE_DCSR].value, 16, 1, 0x1);
1469 xscale_write_dcsr(target, 1, 0);
1471 /* select BYPASS, because having DCSR selected caused problems on the PXA27x */
1472 xscale_jtag_set_instr(target->tap, ~0, TAP_IDLE);
1473 jtag_execute_queue();
1475 target->state = TARGET_RESET;
1477 if (target->reset_halt) {
1478 int retval = target_halt(target);
1479 if (retval != ERROR_OK)
1486 static int xscale_deassert_reset(struct target *target)
1488 struct xscale_common *xscale = target_to_xscale(target);
1489 struct breakpoint *breakpoint = target->breakpoints;
1493 xscale->ibcr_available = 2;
1494 xscale->ibcr0_used = 0;
1495 xscale->ibcr1_used = 0;
1497 xscale->dbr_available = 2;
1498 xscale->dbr0_used = 0;
1499 xscale->dbr1_used = 0;
1501 /* mark all hardware breakpoints as unset */
1502 while (breakpoint) {
1503 if (breakpoint->type == BKPT_HARD)
1504 breakpoint->set = 0;
1505 breakpoint = breakpoint->next;
1508 xscale->trace.mode = XSCALE_TRACE_DISABLED;
1509 xscale_free_trace_data(xscale);
1511 register_cache_invalidate(xscale->arm.core_cache);
1513 /* FIXME mark hardware watchpoints got unset too. Also,
1514 * at least some of the XScale registers are invalid...
1518 * REVISIT: *assumes* we had a SRST+TRST reset so the mini-icache
1519 * contents got invalidated. Safer to force that, so writing new
1520 * contents can't ever fail..
1525 const uint8_t *buffer = xscale_debug_handler;
1529 jtag_add_reset(0, 0);
1531 /* wait 300ms; 150 and 100ms were not enough */
1532 jtag_add_sleep(300*1000);
1534 jtag_add_runtest(2030, TAP_IDLE);
1535 jtag_execute_queue();
1537 /* set Hold reset, Halt mode and Trap Reset */
1538 buf_set_u32(xscale->reg_cache->reg_list[XSCALE_DCSR].value, 30, 1, 0x1);
1539 buf_set_u32(xscale->reg_cache->reg_list[XSCALE_DCSR].value, 16, 1, 0x1);
1540 xscale_write_dcsr(target, 1, 0);
1542 /* Load the debug handler into the mini-icache. Since
1543 * it's using halt mode (not monitor mode), it runs in
1544 * "Special Debug State" for access to registers, memory,
1545 * coprocessors, trace data, etc.
1547 address = xscale->handler_address;
1548 for (unsigned binary_size = sizeof xscale_debug_handler;
1550 binary_size -= buf_cnt, buffer += buf_cnt) {
1551 uint32_t cache_line[8];
1554 buf_cnt = binary_size;
1558 for (i = 0; i < buf_cnt; i += 4) {
1559 /* convert LE buffer to host-endian uint32_t */
1560 cache_line[i / 4] = le_to_h_u32(&buffer[i]);
1563 for (; i < 32; i += 4)
1564 cache_line[i / 4] = 0xe1a08008;
1566 /* only load addresses other than the reset vectors */
1567 if ((address % 0x400) != 0x0) {
1568 retval = xscale_load_ic(target, address,
1570 if (retval != ERROR_OK)
1578 retval = xscale_load_ic(target, 0x0,
1579 xscale->low_vectors);
1580 if (retval != ERROR_OK)
1582 retval = xscale_load_ic(target, 0xffff0000,
1583 xscale->high_vectors);
1584 if (retval != ERROR_OK)
1587 jtag_add_runtest(30, TAP_IDLE);
1589 jtag_add_sleep(100000);
1591 /* set Hold reset, Halt mode and Trap Reset */
1592 buf_set_u32(xscale->reg_cache->reg_list[XSCALE_DCSR].value, 30, 1, 0x1);
1593 buf_set_u32(xscale->reg_cache->reg_list[XSCALE_DCSR].value, 16, 1, 0x1);
1594 xscale_write_dcsr(target, 1, 0);
1596 /* clear Hold reset to let the target run (should enter debug handler) */
1597 xscale_write_dcsr(target, 0, 1);
1598 target->state = TARGET_RUNNING;
1600 if (!target->reset_halt) {
1601 jtag_add_sleep(10000);
1603 /* we should have entered debug now */
1604 xscale_debug_entry(target);
1605 target->state = TARGET_HALTED;
1607 /* resume the target */
1608 xscale_resume(target, 1, 0x0, 1, 0);
1615 static int xscale_read_core_reg(struct target *target, struct reg *r,
1616 int num, enum arm_mode mode)
1618 /** \todo add debug handler support for core register reads */
1619 LOG_ERROR("not implemented");
1623 static int xscale_write_core_reg(struct target *target, struct reg *r,
1624 int num, enum arm_mode mode, uint32_t value)
1626 /** \todo add debug handler support for core register writes */
1627 LOG_ERROR("not implemented");
1631 static int xscale_full_context(struct target *target)
1633 struct arm *arm = target_to_arm(target);
1641 if (target->state != TARGET_HALTED) {
1642 LOG_WARNING("target not halted");
1643 return ERROR_TARGET_NOT_HALTED;
1646 buffer = malloc(4 * 8);
1648 /* iterate through processor modes (FIQ, IRQ, SVC, ABT, UND and SYS)
1649 * we can't enter User mode on an XScale (unpredictable),
1650 * but User shares registers with SYS
1652 for (i = 1; i < 7; i++) {
1653 enum arm_mode mode = armv4_5_number_to_mode(i);
1657 if (mode == ARM_MODE_USR)
1660 /* check if there are invalid registers in the current mode
1662 for (j = 0; valid && j <= 16; j++) {
1663 if (!ARMV4_5_CORE_REG_MODE(arm->core_cache,
1670 /* request banked registers */
1671 xscale_send_u32(target, 0x0);
1673 /* send CPSR for desired bank mode */
1674 xscale_send_u32(target, mode | 0xc0 /* I/F bits */);
1676 /* get banked registers: r8 to r14; and SPSR
1677 * except in USR/SYS mode
1679 if (mode != ARM_MODE_SYS) {
1681 r = &ARMV4_5_CORE_REG_MODE(arm->core_cache,
1684 xscale_receive(target, buffer, 8);
1686 buf_set_u32(r->value, 0, 32, buffer[7]);
1690 xscale_receive(target, buffer, 7);
1692 /* move data from buffer to register cache */
1693 for (j = 8; j <= 14; j++) {
1694 r = &ARMV4_5_CORE_REG_MODE(arm->core_cache,
1697 buf_set_u32(r->value, 0, 32, buffer[j - 8]);
1708 static int xscale_restore_banked(struct target *target)
1710 struct arm *arm = target_to_arm(target);
1714 if (target->state != TARGET_HALTED) {
1715 LOG_WARNING("target not halted");
1716 return ERROR_TARGET_NOT_HALTED;
1719 /* iterate through processor modes (FIQ, IRQ, SVC, ABT, UND and SYS)
1720 * and check if any banked registers need to be written. Ignore
1721 * USR mode (number 0) in favor of SYS; we can't enter User mode on
1722 * an XScale (unpredictable), but they share all registers.
1724 for (i = 1; i < 7; i++) {
1725 enum arm_mode mode = armv4_5_number_to_mode(i);
1728 if (mode == ARM_MODE_USR)
1731 /* check if there are dirty registers in this mode */
1732 for (j = 8; j <= 14; j++) {
1733 if (ARMV4_5_CORE_REG_MODE(arm->core_cache,
1738 /* if not USR/SYS, check if the SPSR needs to be written */
1739 if (mode != ARM_MODE_SYS) {
1740 if (ARMV4_5_CORE_REG_MODE(arm->core_cache,
1745 /* there's nothing to flush for this mode */
1749 /* command 0x1: "send banked registers" */
1750 xscale_send_u32(target, 0x1);
1752 /* send CPSR for desired mode */
1753 xscale_send_u32(target, mode | 0xc0 /* I/F bits */);
1755 /* send r8 to r14/lr ... only FIQ needs more than r13..r14,
1756 * but this protocol doesn't understand that nuance.
1758 for (j = 8; j <= 14; j++) {
1759 r = &ARMV4_5_CORE_REG_MODE(arm->core_cache,
1761 xscale_send_u32(target, buf_get_u32(r->value, 0, 32));
1765 /* send spsr if not in USR/SYS mode */
1766 if (mode != ARM_MODE_SYS) {
1767 r = &ARMV4_5_CORE_REG_MODE(arm->core_cache,
1769 xscale_send_u32(target, buf_get_u32(r->value, 0, 32));
1777 static int xscale_read_memory(struct target *target, uint32_t address,
1778 uint32_t size, uint32_t count, uint8_t *buffer)
1780 struct xscale_common *xscale = target_to_xscale(target);
1785 LOG_DEBUG("address: 0x%8.8" PRIx32 ", size: 0x%8.8" PRIx32 ", count: 0x%8.8" PRIx32,
1790 if (target->state != TARGET_HALTED) {
1791 LOG_WARNING("target not halted");
1792 return ERROR_TARGET_NOT_HALTED;
1795 /* sanitize arguments */
1796 if (((size != 4) && (size != 2) && (size != 1)) || (count == 0) || !(buffer))
1797 return ERROR_COMMAND_SYNTAX_ERROR;
1799 if (((size == 4) && (address & 0x3u)) || ((size == 2) && (address & 0x1u)))
1800 return ERROR_TARGET_UNALIGNED_ACCESS;
1802 /* send memory read request (command 0x1n, n: access size) */
1803 retval = xscale_send_u32(target, 0x10 | size);
1804 if (retval != ERROR_OK)
1807 /* send base address for read request */
1808 retval = xscale_send_u32(target, address);
1809 if (retval != ERROR_OK)
1812 /* send number of requested data words */
1813 retval = xscale_send_u32(target, count);
1814 if (retval != ERROR_OK)
1817 /* receive data from target (count times 32-bit words in host endianness) */
1818 buf32 = malloc(4 * count);
1819 retval = xscale_receive(target, buf32, count);
1820 if (retval != ERROR_OK) {
1825 /* extract data from host-endian buffer into byte stream */
1826 for (i = 0; i < count; i++) {
1829 target_buffer_set_u32(target, buffer, buf32[i]);
1833 target_buffer_set_u16(target, buffer, buf32[i] & 0xffff);
1837 *buffer++ = buf32[i] & 0xff;
1840 LOG_ERROR("invalid read size");
1841 return ERROR_COMMAND_SYNTAX_ERROR;
1847 /* examine DCSR, to see if Sticky Abort (SA) got set */
1848 retval = xscale_read_dcsr(target);
1849 if (retval != ERROR_OK)
1851 if (buf_get_u32(xscale->reg_cache->reg_list[XSCALE_DCSR].value, 5, 1) == 1) {
1853 retval = xscale_send_u32(target, 0x60);
1854 if (retval != ERROR_OK)
1857 return ERROR_TARGET_DATA_ABORT;
1863 static int xscale_read_phys_memory(struct target *target, uint32_t address,
1864 uint32_t size, uint32_t count, uint8_t *buffer)
1866 struct xscale_common *xscale = target_to_xscale(target);
1868 /* with MMU inactive, there are only physical addresses */
1869 if (!xscale->armv4_5_mmu.mmu_enabled)
1870 return xscale_read_memory(target, address, size, count, buffer);
1872 /** \todo: provide a non-stub implementation of this routine. */
1873 LOG_ERROR("%s: %s is not implemented. Disable MMU?",
1874 target_name(target), __func__);
1878 static int xscale_write_memory(struct target *target, uint32_t address,
1879 uint32_t size, uint32_t count, const uint8_t *buffer)
1881 struct xscale_common *xscale = target_to_xscale(target);
1884 LOG_DEBUG("address: 0x%8.8" PRIx32 ", size: 0x%8.8" PRIx32 ", count: 0x%8.8" PRIx32,
1889 if (target->state != TARGET_HALTED) {
1890 LOG_WARNING("target not halted");
1891 return ERROR_TARGET_NOT_HALTED;
1894 /* sanitize arguments */
1895 if (((size != 4) && (size != 2) && (size != 1)) || (count == 0) || !(buffer))
1896 return ERROR_COMMAND_SYNTAX_ERROR;
1898 if (((size == 4) && (address & 0x3u)) || ((size == 2) && (address & 0x1u)))
1899 return ERROR_TARGET_UNALIGNED_ACCESS;
1901 /* send memory write request (command 0x2n, n: access size) */
1902 retval = xscale_send_u32(target, 0x20 | size);
1903 if (retval != ERROR_OK)
1906 /* send base address for read request */
1907 retval = xscale_send_u32(target, address);
1908 if (retval != ERROR_OK)
1911 /* send number of requested data words to be written*/
1912 retval = xscale_send_u32(target, count);
1913 if (retval != ERROR_OK)
1916 /* extract data from host-endian buffer into byte stream */
1918 for (i = 0; i < count; i++) {
1921 value = target_buffer_get_u32(target, buffer);
1922 xscale_send_u32(target, value);
1926 value = target_buffer_get_u16(target, buffer);
1927 xscale_send_u32(target, value);
1932 xscale_send_u32(target, value);
1936 LOG_ERROR("should never get here");
1941 retval = xscale_send(target, buffer, count, size);
1942 if (retval != ERROR_OK)
1945 /* examine DCSR, to see if Sticky Abort (SA) got set */
1946 retval = xscale_read_dcsr(target);
1947 if (retval != ERROR_OK)
1949 if (buf_get_u32(xscale->reg_cache->reg_list[XSCALE_DCSR].value, 5, 1) == 1) {
1951 retval = xscale_send_u32(target, 0x60);
1952 if (retval != ERROR_OK)
1955 LOG_ERROR("data abort writing memory");
1956 return ERROR_TARGET_DATA_ABORT;
1962 static int xscale_write_phys_memory(struct target *target, uint32_t address,
1963 uint32_t size, uint32_t count, const uint8_t *buffer)
1965 struct xscale_common *xscale = target_to_xscale(target);
1967 /* with MMU inactive, there are only physical addresses */
1968 if (!xscale->armv4_5_mmu.mmu_enabled)
1969 return xscale_write_memory(target, address, size, count, buffer);
1971 /** \todo: provide a non-stub implementation of this routine. */
1972 LOG_ERROR("%s: %s is not implemented. Disable MMU?",
1973 target_name(target), __func__);
1977 static int xscale_get_ttb(struct target *target, uint32_t *result)
1979 struct xscale_common *xscale = target_to_xscale(target);
1983 retval = xscale_get_reg(&xscale->reg_cache->reg_list[XSCALE_TTB]);
1984 if (retval != ERROR_OK)
1986 ttb = buf_get_u32(xscale->reg_cache->reg_list[XSCALE_TTB].value, 0, 32);
1993 static int xscale_disable_mmu_caches(struct target *target, int mmu,
1994 int d_u_cache, int i_cache)
1996 struct xscale_common *xscale = target_to_xscale(target);
1997 uint32_t cp15_control;
2000 /* read cp15 control register */
2001 retval = xscale_get_reg(&xscale->reg_cache->reg_list[XSCALE_CTRL]);
2002 if (retval != ERROR_OK)
2004 cp15_control = buf_get_u32(xscale->reg_cache->reg_list[XSCALE_CTRL].value, 0, 32);
2007 cp15_control &= ~0x1U;
2011 retval = xscale_send_u32(target, 0x50);
2012 if (retval != ERROR_OK)
2014 retval = xscale_send_u32(target, xscale->cache_clean_address);
2015 if (retval != ERROR_OK)
2018 /* invalidate DCache */
2019 retval = xscale_send_u32(target, 0x51);
2020 if (retval != ERROR_OK)
2023 cp15_control &= ~0x4U;
2027 /* invalidate ICache */
2028 retval = xscale_send_u32(target, 0x52);
2029 if (retval != ERROR_OK)
2031 cp15_control &= ~0x1000U;
2034 /* write new cp15 control register */
2035 retval = xscale_set_reg_u32(&xscale->reg_cache->reg_list[XSCALE_CTRL], cp15_control);
2036 if (retval != ERROR_OK)
2039 /* execute cpwait to ensure outstanding operations complete */
2040 retval = xscale_send_u32(target, 0x53);
2044 static int xscale_enable_mmu_caches(struct target *target, int mmu,
2045 int d_u_cache, int i_cache)
2047 struct xscale_common *xscale = target_to_xscale(target);
2048 uint32_t cp15_control;
2051 /* read cp15 control register */
2052 retval = xscale_get_reg(&xscale->reg_cache->reg_list[XSCALE_CTRL]);
2053 if (retval != ERROR_OK)
2055 cp15_control = buf_get_u32(xscale->reg_cache->reg_list[XSCALE_CTRL].value, 0, 32);
2058 cp15_control |= 0x1U;
2061 cp15_control |= 0x4U;
2064 cp15_control |= 0x1000U;
2066 /* write new cp15 control register */
2067 retval = xscale_set_reg_u32(&xscale->reg_cache->reg_list[XSCALE_CTRL], cp15_control);
2068 if (retval != ERROR_OK)
2071 /* execute cpwait to ensure outstanding operations complete */
2072 retval = xscale_send_u32(target, 0x53);
2076 static int xscale_set_breakpoint(struct target *target,
2077 struct breakpoint *breakpoint)
2080 struct xscale_common *xscale = target_to_xscale(target);
2082 if (target->state != TARGET_HALTED) {
2083 LOG_WARNING("target not halted");
2084 return ERROR_TARGET_NOT_HALTED;
2087 if (breakpoint->set) {
2088 LOG_WARNING("breakpoint already set");
2092 if (breakpoint->type == BKPT_HARD) {
2093 uint32_t value = breakpoint->address | 1;
2094 if (!xscale->ibcr0_used) {
2095 xscale_set_reg_u32(&xscale->reg_cache->reg_list[XSCALE_IBCR0], value);
2096 xscale->ibcr0_used = 1;
2097 breakpoint->set = 1; /* breakpoint set on first breakpoint register */
2098 } else if (!xscale->ibcr1_used) {
2099 xscale_set_reg_u32(&xscale->reg_cache->reg_list[XSCALE_IBCR1], value);
2100 xscale->ibcr1_used = 1;
2101 breakpoint->set = 2; /* breakpoint set on second breakpoint register */
2102 } else {/* bug: availability previously verified in xscale_add_breakpoint() */
2103 LOG_ERROR("BUG: no hardware comparator available");
2104 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
2106 } else if (breakpoint->type == BKPT_SOFT) {
2107 if (breakpoint->length == 4) {
2108 /* keep the original instruction in target endianness */
2109 retval = target_read_memory(target, breakpoint->address, 4, 1,
2110 breakpoint->orig_instr);
2111 if (retval != ERROR_OK)
2113 /* write the bkpt instruction in target endianness
2114 *(arm7_9->arm_bkpt is host endian) */
2115 retval = target_write_u32(target, breakpoint->address,
2117 if (retval != ERROR_OK)
2120 /* keep the original instruction in target endianness */
2121 retval = target_read_memory(target, breakpoint->address, 2, 1,
2122 breakpoint->orig_instr);
2123 if (retval != ERROR_OK)
2125 /* write the bkpt instruction in target endianness
2126 *(arm7_9->arm_bkpt is host endian) */
2127 retval = target_write_u16(target, breakpoint->address,
2128 xscale->thumb_bkpt);
2129 if (retval != ERROR_OK)
2132 breakpoint->set = 1;
2134 xscale_send_u32(target, 0x50); /* clean dcache */
2135 xscale_send_u32(target, xscale->cache_clean_address);
2136 xscale_send_u32(target, 0x51); /* invalidate dcache */
2137 xscale_send_u32(target, 0x52); /* invalidate icache and flush fetch buffers */
2143 static int xscale_add_breakpoint(struct target *target,
2144 struct breakpoint *breakpoint)
2146 struct xscale_common *xscale = target_to_xscale(target);
2148 if ((breakpoint->type == BKPT_HARD) && (xscale->ibcr_available < 1)) {
2149 LOG_ERROR("no breakpoint unit available for hardware breakpoint");
2150 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
2153 if ((breakpoint->length != 2) && (breakpoint->length != 4)) {
2154 LOG_ERROR("only breakpoints of two (Thumb) or four (ARM) bytes length supported");
2155 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
2158 if (breakpoint->type == BKPT_HARD)
2159 xscale->ibcr_available--;
2161 return xscale_set_breakpoint(target, breakpoint);
2164 static int xscale_unset_breakpoint(struct target *target,
2165 struct breakpoint *breakpoint)
2168 struct xscale_common *xscale = target_to_xscale(target);
2170 if (target->state != TARGET_HALTED) {
2171 LOG_WARNING("target not halted");
2172 return ERROR_TARGET_NOT_HALTED;
2175 if (!breakpoint->set) {
2176 LOG_WARNING("breakpoint not set");
2180 if (breakpoint->type == BKPT_HARD) {
2181 if (breakpoint->set == 1) {
2182 xscale_set_reg_u32(&xscale->reg_cache->reg_list[XSCALE_IBCR0], 0x0);
2183 xscale->ibcr0_used = 0;
2184 } else if (breakpoint->set == 2) {
2185 xscale_set_reg_u32(&xscale->reg_cache->reg_list[XSCALE_IBCR1], 0x0);
2186 xscale->ibcr1_used = 0;
2188 breakpoint->set = 0;
2190 /* restore original instruction (kept in target endianness) */
2191 if (breakpoint->length == 4) {
2192 retval = target_write_memory(target, breakpoint->address, 4, 1,
2193 breakpoint->orig_instr);
2194 if (retval != ERROR_OK)
2197 retval = target_write_memory(target, breakpoint->address, 2, 1,
2198 breakpoint->orig_instr);
2199 if (retval != ERROR_OK)
2202 breakpoint->set = 0;
2204 xscale_send_u32(target, 0x50); /* clean dcache */
2205 xscale_send_u32(target, xscale->cache_clean_address);
2206 xscale_send_u32(target, 0x51); /* invalidate dcache */
2207 xscale_send_u32(target, 0x52); /* invalidate icache and flush fetch buffers */
2213 static int xscale_remove_breakpoint(struct target *target, struct breakpoint *breakpoint)
2215 struct xscale_common *xscale = target_to_xscale(target);
2217 if (target->state != TARGET_HALTED) {
2218 LOG_ERROR("target not halted");
2219 return ERROR_TARGET_NOT_HALTED;
2222 if (breakpoint->set)
2223 xscale_unset_breakpoint(target, breakpoint);
2225 if (breakpoint->type == BKPT_HARD)
2226 xscale->ibcr_available++;
2231 static int xscale_set_watchpoint(struct target *target,
2232 struct watchpoint *watchpoint)
2234 struct xscale_common *xscale = target_to_xscale(target);
2235 uint32_t enable = 0;
2236 struct reg *dbcon = &xscale->reg_cache->reg_list[XSCALE_DBCON];
2237 uint32_t dbcon_value = buf_get_u32(dbcon->value, 0, 32);
2239 if (target->state != TARGET_HALTED) {
2240 LOG_ERROR("target not halted");
2241 return ERROR_TARGET_NOT_HALTED;
2244 switch (watchpoint->rw) {
2255 LOG_ERROR("BUG: watchpoint->rw neither read, write nor access");
2258 /* For watchpoint across more than one word, both DBR registers must
2259 be enlisted, with the second used as a mask. */
2260 if (watchpoint->length > 4) {
2261 if (xscale->dbr0_used || xscale->dbr1_used) {
2262 LOG_ERROR("BUG: sufficient hardware comparators unavailable");
2263 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
2266 /* Write mask value to DBR1, based on the length argument.
2267 * Address bits ignored by the comparator are those set in mask. */
2268 xscale_set_reg_u32(&xscale->reg_cache->reg_list[XSCALE_DBR1],
2269 watchpoint->length - 1);
2270 xscale->dbr1_used = 1;
2271 enable |= 0x100; /* DBCON[M] */
2274 if (!xscale->dbr0_used) {
2275 xscale_set_reg_u32(&xscale->reg_cache->reg_list[XSCALE_DBR0], watchpoint->address);
2276 dbcon_value |= enable;
2277 xscale_set_reg_u32(dbcon, dbcon_value);
2278 watchpoint->set = 1;
2279 xscale->dbr0_used = 1;
2280 } else if (!xscale->dbr1_used) {
2281 xscale_set_reg_u32(&xscale->reg_cache->reg_list[XSCALE_DBR1], watchpoint->address);
2282 dbcon_value |= enable << 2;
2283 xscale_set_reg_u32(dbcon, dbcon_value);
2284 watchpoint->set = 2;
2285 xscale->dbr1_used = 1;
2287 LOG_ERROR("BUG: no hardware comparator available");
2288 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
2294 static int xscale_add_watchpoint(struct target *target,
2295 struct watchpoint *watchpoint)
2297 struct xscale_common *xscale = target_to_xscale(target);
2299 if (xscale->dbr_available < 1) {
2300 LOG_ERROR("no more watchpoint registers available");
2301 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
2304 if (watchpoint->value)
2305 LOG_WARNING("xscale does not support value, mask arguments; ignoring");
2307 /* check that length is a power of two */
2308 for (uint32_t len = watchpoint->length; len != 1; len /= 2) {
2310 LOG_ERROR("xscale requires that watchpoint length is a power of two");
2311 return ERROR_COMMAND_ARGUMENT_INVALID;
2315 if (watchpoint->length == 4) { /* single word watchpoint */
2316 xscale->dbr_available--;/* one DBR reg used */
2320 /* watchpoints across multiple words require both DBR registers */
2321 if (xscale->dbr_available < 2) {
2322 LOG_ERROR("insufficient watchpoint registers available");
2323 return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
2326 if (watchpoint->length > watchpoint->address) {
2327 LOG_ERROR("xscale does not support watchpoints with length "
2328 "greater than address");
2329 return ERROR_COMMAND_ARGUMENT_INVALID;
2332 xscale->dbr_available = 0;
2336 static int xscale_unset_watchpoint(struct target *target,
2337 struct watchpoint *watchpoint)
2339 struct xscale_common *xscale = target_to_xscale(target);
2340 struct reg *dbcon = &xscale->reg_cache->reg_list[XSCALE_DBCON];
2341 uint32_t dbcon_value = buf_get_u32(dbcon->value, 0, 32);
2343 if (target->state != TARGET_HALTED) {
2344 LOG_WARNING("target not halted");
2345 return ERROR_TARGET_NOT_HALTED;
2348 if (!watchpoint->set) {
2349 LOG_WARNING("breakpoint not set");
2353 if (watchpoint->set == 1) {
2354 if (watchpoint->length > 4) {
2355 dbcon_value &= ~0x103; /* clear DBCON[M] as well */
2356 xscale->dbr1_used = 0; /* DBR1 was used for mask */
2358 dbcon_value &= ~0x3;
2360 xscale_set_reg_u32(dbcon, dbcon_value);
2361 xscale->dbr0_used = 0;
2362 } else if (watchpoint->set == 2) {
2363 dbcon_value &= ~0xc;
2364 xscale_set_reg_u32(dbcon, dbcon_value);
2365 xscale->dbr1_used = 0;
2367 watchpoint->set = 0;
2372 static int xscale_remove_watchpoint(struct target *target, struct watchpoint *watchpoint)
2374 struct xscale_common *xscale = target_to_xscale(target);
2376 if (target->state != TARGET_HALTED) {
2377 LOG_ERROR("target not halted");
2378 return ERROR_TARGET_NOT_HALTED;
2381 if (watchpoint->set)
2382 xscale_unset_watchpoint(target, watchpoint);
2384 if (watchpoint->length > 4)
2385 xscale->dbr_available++;/* both DBR regs now available */
2387 xscale->dbr_available++;
2392 static int xscale_get_reg(struct reg *reg)
2394 struct xscale_reg *arch_info = reg->arch_info;
2395 struct target *target = arch_info->target;
2396 struct xscale_common *xscale = target_to_xscale(target);
2398 /* DCSR, TX and RX are accessible via JTAG */
2399 if (strcmp(reg->name, "XSCALE_DCSR") == 0)
2400 return xscale_read_dcsr(arch_info->target);
2401 else if (strcmp(reg->name, "XSCALE_TX") == 0) {
2402 /* 1 = consume register content */
2403 return xscale_read_tx(arch_info->target, 1);
2404 } else if (strcmp(reg->name, "XSCALE_RX") == 0) {
2405 /* can't read from RX register (host -> debug handler) */
2407 } else if (strcmp(reg->name, "XSCALE_TXRXCTRL") == 0) {
2408 /* can't (explicitly) read from TXRXCTRL register */
2410 } else {/* Other DBG registers have to be transfered by the debug handler
2411 * send CP read request (command 0x40) */
2412 xscale_send_u32(target, 0x40);
2414 /* send CP register number */
2415 xscale_send_u32(target, arch_info->dbg_handler_number);
2417 /* read register value */
2418 xscale_read_tx(target, 1);
2419 buf_cpy(xscale->reg_cache->reg_list[XSCALE_TX].value, reg->value, 32);
2428 static int xscale_set_reg(struct reg *reg, uint8_t *buf)
2430 struct xscale_reg *arch_info = reg->arch_info;
2431 struct target *target = arch_info->target;
2432 struct xscale_common *xscale = target_to_xscale(target);
2433 uint32_t value = buf_get_u32(buf, 0, 32);
2435 /* DCSR, TX and RX are accessible via JTAG */
2436 if (strcmp(reg->name, "XSCALE_DCSR") == 0) {
2437 buf_set_u32(xscale->reg_cache->reg_list[XSCALE_DCSR].value, 0, 32, value);
2438 return xscale_write_dcsr(arch_info->target, -1, -1);
2439 } else if (strcmp(reg->name, "XSCALE_RX") == 0) {
2440 buf_set_u32(xscale->reg_cache->reg_list[XSCALE_RX].value, 0, 32, value);
2441 return xscale_write_rx(arch_info->target);
2442 } else if (strcmp(reg->name, "XSCALE_TX") == 0) {
2443 /* can't write to TX register (debug-handler -> host) */
2445 } else if (strcmp(reg->name, "XSCALE_TXRXCTRL") == 0) {
2446 /* can't (explicitly) write to TXRXCTRL register */
2448 } else {/* Other DBG registers have to be transfered by the debug handler
2449 * send CP write request (command 0x41) */
2450 xscale_send_u32(target, 0x41);
2452 /* send CP register number */
2453 xscale_send_u32(target, arch_info->dbg_handler_number);
2455 /* send CP register value */
2456 xscale_send_u32(target, value);
2457 buf_set_u32(reg->value, 0, 32, value);
2463 static int xscale_write_dcsr_sw(struct target *target, uint32_t value)
2465 struct xscale_common *xscale = target_to_xscale(target);
2466 struct reg *dcsr = &xscale->reg_cache->reg_list[XSCALE_DCSR];
2467 struct xscale_reg *dcsr_arch_info = dcsr->arch_info;
2469 /* send CP write request (command 0x41) */
2470 xscale_send_u32(target, 0x41);
2472 /* send CP register number */
2473 xscale_send_u32(target, dcsr_arch_info->dbg_handler_number);
2475 /* send CP register value */
2476 xscale_send_u32(target, value);
2477 buf_set_u32(dcsr->value, 0, 32, value);
2482 static int xscale_read_trace(struct target *target)
2484 struct xscale_common *xscale = target_to_xscale(target);
2485 struct arm *arm = &xscale->arm;
2486 struct xscale_trace_data **trace_data_p;
2488 /* 258 words from debug handler
2489 * 256 trace buffer entries
2490 * 2 checkpoint addresses
2492 uint32_t trace_buffer[258];
2493 int is_address[256];
2495 unsigned int num_checkpoints = 0;
2497 if (target->state != TARGET_HALTED) {
2498 LOG_WARNING("target must be stopped to read trace data");
2499 return ERROR_TARGET_NOT_HALTED;
2502 /* send read trace buffer command (command 0x61) */
2503 xscale_send_u32(target, 0x61);
2505 /* receive trace buffer content */
2506 xscale_receive(target, trace_buffer, 258);
2508 /* parse buffer backwards to identify address entries */
2509 for (i = 255; i >= 0; i--) {
2510 /* also count number of checkpointed entries */
2511 if ((trace_buffer[i] & 0xe0) == 0xc0)
2515 if (((trace_buffer[i] & 0xf0) == 0x90) ||
2516 ((trace_buffer[i] & 0xf0) == 0xd0)) {
2518 is_address[--i] = 1;
2520 is_address[--i] = 1;
2522 is_address[--i] = 1;
2524 is_address[--i] = 1;
2529 /* search first non-zero entry that is not part of an address */
2530 for (j = 0; (j < 256) && (trace_buffer[j] == 0) && (!is_address[j]); j++)
2534 LOG_DEBUG("no trace data collected");
2535 return ERROR_XSCALE_NO_TRACE_DATA;
2538 /* account for possible partial address at buffer start (wrap mode only) */
2539 if (is_address[0]) { /* first entry is address; complete set of 4? */
2542 if (!is_address[i++])
2545 j += i; /* partial address; can't use it */
2548 /* if first valid entry is indirect branch, can't use that either (no address) */
2549 if (((trace_buffer[j] & 0xf0) == 0x90) || ((trace_buffer[j] & 0xf0) == 0xd0))
2552 /* walk linked list to terminating entry */
2553 for (trace_data_p = &xscale->trace.data; *trace_data_p;
2554 trace_data_p = &(*trace_data_p)->next)
2557 *trace_data_p = malloc(sizeof(struct xscale_trace_data));
2558 (*trace_data_p)->next = NULL;
2559 (*trace_data_p)->chkpt0 = trace_buffer[256];
2560 (*trace_data_p)->chkpt1 = trace_buffer[257];
2561 (*trace_data_p)->last_instruction = buf_get_u32(arm->pc->value, 0, 32);
2562 (*trace_data_p)->entries = malloc(sizeof(struct xscale_trace_entry) * (256 - j));
2563 (*trace_data_p)->depth = 256 - j;
2564 (*trace_data_p)->num_checkpoints = num_checkpoints;
2566 for (i = j; i < 256; i++) {
2567 (*trace_data_p)->entries[i - j].data = trace_buffer[i];
2569 (*trace_data_p)->entries[i - j].type = XSCALE_TRACE_ADDRESS;
2571 (*trace_data_p)->entries[i - j].type = XSCALE_TRACE_MESSAGE;
2577 static int xscale_read_instruction(struct target *target, uint32_t pc,
2578 struct arm_instruction *instruction)
2580 struct xscale_common *const xscale = target_to_xscale(target);
2587 if (!xscale->trace.image)
2588 return ERROR_TRACE_IMAGE_UNAVAILABLE;
2590 /* search for the section the current instruction belongs to */
2591 for (i = 0; i < xscale->trace.image->num_sections; i++) {
2592 if ((xscale->trace.image->sections[i].base_address <= pc) &&
2593 (xscale->trace.image->sections[i].base_address +
2594 xscale->trace.image->sections[i].size > pc)) {
2600 if (section == -1) {
2601 /* current instruction couldn't be found in the image */
2602 return ERROR_TRACE_INSTRUCTION_UNAVAILABLE;
2605 if (xscale->trace.core_state == ARM_STATE_ARM) {
2607 retval = image_read_section(xscale->trace.image, section,
2608 pc - xscale->trace.image->sections[section].base_address,
2609 4, buf, &size_read);
2610 if (retval != ERROR_OK) {
2611 LOG_ERROR("error while reading instruction");
2612 return ERROR_TRACE_INSTRUCTION_UNAVAILABLE;
2614 opcode = target_buffer_get_u32(target, buf);
2615 arm_evaluate_opcode(opcode, pc, instruction);
2616 } else if (xscale->trace.core_state == ARM_STATE_THUMB) {
2618 retval = image_read_section(xscale->trace.image, section,
2619 pc - xscale->trace.image->sections[section].base_address,
2620 2, buf, &size_read);
2621 if (retval != ERROR_OK) {
2622 LOG_ERROR("error while reading instruction");
2623 return ERROR_TRACE_INSTRUCTION_UNAVAILABLE;
2625 opcode = target_buffer_get_u16(target, buf);
2626 thumb_evaluate_opcode(opcode, pc, instruction);
2628 LOG_ERROR("BUG: unknown core state encountered");
2635 /* Extract address encoded into trace data.
2636 * Write result to address referenced by argument 'target', or 0 if incomplete. */
2637 static inline void xscale_branch_address(struct xscale_trace_data *trace_data,
2638 int i, uint32_t *target)
2640 /* if there are less than four entries prior to the indirect branch message
2641 * we can't extract the address */
2645 *target = (trace_data->entries[i-1].data) | (trace_data->entries[i-2].data << 8) |
2646 (trace_data->entries[i-3].data << 16) | (trace_data->entries[i-4].data << 24);
2650 static inline void xscale_display_instruction(struct target *target, uint32_t pc,
2651 struct arm_instruction *instruction,
2652 struct command_context *cmd_ctx)
2654 int retval = xscale_read_instruction(target, pc, instruction);
2655 if (retval == ERROR_OK)
2656 command_print(cmd_ctx, "%s", instruction->text);
2658 command_print(cmd_ctx, "0x%8.8" PRIx32 "\t<not found in image>", pc);
2661 static int xscale_analyze_trace(struct target *target, struct command_context *cmd_ctx)
2663 struct xscale_common *xscale = target_to_xscale(target);
2664 struct xscale_trace_data *trace_data = xscale->trace.data;
2666 uint32_t breakpoint_pc;
2667 struct arm_instruction instruction;
2668 uint32_t current_pc = 0;/* initialized when address determined */
2670 if (!xscale->trace.image)
2671 LOG_WARNING("No trace image loaded; use 'xscale trace_image'");
2673 /* loop for each trace buffer that was loaded from target */
2674 while (trace_data) {
2675 int chkpt = 0; /* incremented as checkpointed entries found */
2678 /* FIXME: set this to correct mode when trace buffer is first enabled */
2679 xscale->trace.core_state = ARM_STATE_ARM;
2681 /* loop for each entry in this trace buffer */
2682 for (i = 0; i < trace_data->depth; i++) {
2684 uint32_t chkpt_reg = 0x0;
2685 uint32_t branch_target = 0;
2688 /* trace entry type is upper nybble of 'message byte' */
2689 int trace_msg_type = (trace_data->entries[i].data & 0xf0) >> 4;
2691 /* Target addresses of indirect branches are written into buffer
2692 * before the message byte representing the branch. Skip past it */
2693 if (trace_data->entries[i].type == XSCALE_TRACE_ADDRESS)
2696 switch (trace_msg_type) {
2697 case 0: /* Exceptions */
2705 exception = (trace_data->entries[i].data & 0x70) >> 4;
2707 /* FIXME: vector table may be at ffff0000 */
2708 branch_target = (trace_data->entries[i].data & 0xf0) >> 2;
2711 case 8: /* Direct Branch */
2714 case 9: /* Indirect Branch */
2715 xscale_branch_address(trace_data, i, &branch_target);
2718 case 13: /* Checkpointed Indirect Branch */
2719 xscale_branch_address(trace_data, i, &branch_target);
2720 if ((trace_data->num_checkpoints == 2) && (chkpt == 0))
2721 chkpt_reg = trace_data->chkpt1; /* 2 chkpts, this is
2724 chkpt_reg = trace_data->chkpt0; /* 1 chkpt, or 2 and
2730 case 12: /* Checkpointed Direct Branch */
2731 if ((trace_data->num_checkpoints == 2) && (chkpt == 0))
2732 chkpt_reg = trace_data->chkpt1; /* 2 chkpts, this is
2735 chkpt_reg = trace_data->chkpt0; /* 1 chkpt, or 2 and
2738 /* if no current_pc, checkpoint will be starting point */
2739 if (current_pc == 0)
2740 branch_target = chkpt_reg;
2745 case 15:/* Roll-over */
2748 default:/* Reserved */
2749 LOG_WARNING("trace is suspect: invalid trace message byte");
2754 /* If we don't have the current_pc yet, but we did get the branch target
2755 * (either from the trace buffer on indirect branch, or from a checkpoint reg),
2756 * then we can start displaying instructions at the next iteration, with
2757 * branch_target as the starting point.
2759 if (current_pc == 0) {
2760 current_pc = branch_target; /* remains 0 unless branch_target *obtained */
2764 /* We have current_pc. Read and display the instructions from the image.
2765 * First, display count instructions (lower nybble of message byte). */
2766 count = trace_data->entries[i].data & 0x0f;
2767 for (j = 0; j < count; j++) {
2768 xscale_display_instruction(target, current_pc, &instruction,
2770 current_pc += xscale->trace.core_state == ARM_STATE_ARM ? 4 : 2;
2773 /* An additional instruction is implicitly added to count for
2774 * rollover and some exceptions: undef, swi, prefetch abort. */
2775 if ((trace_msg_type == 15) || (exception > 0 && exception < 4)) {
2776 xscale_display_instruction(target, current_pc, &instruction,
2778 current_pc += xscale->trace.core_state == ARM_STATE_ARM ? 4 : 2;
2781 if (trace_msg_type == 15) /* rollover */
2785 command_print(cmd_ctx, "--- exception %i ---", exception);
2789 /* not exception or rollover; next instruction is a branch and is
2790 * not included in the count */
2791 xscale_display_instruction(target, current_pc, &instruction, cmd_ctx);
2793 /* for direct branches, extract branch destination from instruction */
2794 if ((trace_msg_type == 8) || (trace_msg_type == 12)) {
2795 retval = xscale_read_instruction(target, current_pc, &instruction);
2796 if (retval == ERROR_OK)
2797 current_pc = instruction.info.b_bl_bx_blx.target_address;
2799 current_pc = 0; /* branch destination unknown */
2801 /* direct branch w/ checkpoint; can also get from checkpoint reg */
2802 if (trace_msg_type == 12) {
2803 if (current_pc == 0)
2804 current_pc = chkpt_reg;
2805 else if (current_pc != chkpt_reg) /* sanity check */
2806 LOG_WARNING("trace is suspect: checkpoint register "
2807 "inconsistent with adddress from image");
2810 if (current_pc == 0)
2811 command_print(cmd_ctx, "address unknown");
2816 /* indirect branch; the branch destination was read from trace buffer */
2817 if ((trace_msg_type == 9) || (trace_msg_type == 13)) {
2818 current_pc = branch_target;
2820 /* sanity check (checkpoint reg is redundant) */
2821 if ((trace_msg_type == 13) && (chkpt_reg != branch_target))
2822 LOG_WARNING("trace is suspect: checkpoint register "
2823 "inconsistent with address from trace buffer");
2826 } /* END: for (i = 0; i < trace_data->depth; i++) */
2828 breakpoint_pc = trace_data->last_instruction; /* used below */
2829 trace_data = trace_data->next;
2831 } /* END: while (trace_data) */
2833 /* Finally... display all instructions up to the value of the pc when the
2834 * debug break occurred (saved when trace data was collected from target).
2835 * This is necessary because the trace only records execution branches and 16
2836 * consecutive instructions (rollovers), so last few typically missed.
2838 if (current_pc == 0)
2839 return ERROR_OK;/* current_pc was never found */
2841 /* how many instructions remaining? */
2842 int gap_count = (breakpoint_pc - current_pc) /
2843 (xscale->trace.core_state == ARM_STATE_ARM ? 4 : 2);
2845 /* should never be negative or over 16, but verify */
2846 if (gap_count < 0 || gap_count > 16) {
2847 LOG_WARNING("trace is suspect: excessive gap at end of trace");
2848 return ERROR_OK;/* bail; large number or negative value no good */
2851 /* display remaining instructions */
2852 for (i = 0; i < gap_count; i++) {
2853 xscale_display_instruction(target, current_pc, &instruction, cmd_ctx);
2854 current_pc += xscale->trace.core_state == ARM_STATE_ARM ? 4 : 2;
2860 static const struct reg_arch_type xscale_reg_type = {
2861 .get = xscale_get_reg,
2862 .set = xscale_set_reg,
2865 static void xscale_build_reg_cache(struct target *target)
2867 struct xscale_common *xscale = target_to_xscale(target);
2868 struct arm *arm = &xscale->arm;
2869 struct reg_cache **cache_p = register_get_last_cache_p(&target->reg_cache);
2870 struct xscale_reg *arch_info = malloc(sizeof(xscale_reg_arch_info));
2872 int num_regs = ARRAY_SIZE(xscale_reg_arch_info);
2874 (*cache_p) = arm_build_reg_cache(target, arm);
2876 (*cache_p)->next = malloc(sizeof(struct reg_cache));
2877 cache_p = &(*cache_p)->next;
2879 /* fill in values for the xscale reg cache */
2880 (*cache_p)->name = "XScale registers";
2881 (*cache_p)->next = NULL;
2882 (*cache_p)->reg_list = malloc(num_regs * sizeof(struct reg));
2883 (*cache_p)->num_regs = num_regs;
2885 for (i = 0; i < num_regs; i++) {
2886 (*cache_p)->reg_list[i].name = xscale_reg_list[i];
2887 (*cache_p)->reg_list[i].value = calloc(4, 1);
2888 (*cache_p)->reg_list[i].dirty = 0;
2889 (*cache_p)->reg_list[i].valid = 0;
2890 (*cache_p)->reg_list[i].size = 32;
2891 (*cache_p)->reg_list[i].arch_info = &arch_info[i];
2892 (*cache_p)->reg_list[i].type = &xscale_reg_type;
2893 arch_info[i] = xscale_reg_arch_info[i];
2894 arch_info[i].target = target;
2897 xscale->reg_cache = (*cache_p);
2900 static int xscale_init_target(struct command_context *cmd_ctx,
2901 struct target *target)
2903 xscale_build_reg_cache(target);
2907 static int xscale_init_arch_info(struct target *target,
2908 struct xscale_common *xscale, struct jtag_tap *tap, const char *variant)
2911 uint32_t high_reset_branch, low_reset_branch;
2916 /* store architecture specfic data */
2917 xscale->common_magic = XSCALE_COMMON_MAGIC;
2919 /* we don't really *need* a variant param ... */
2923 if (strcmp(variant, "pxa250") == 0
2924 || strcmp(variant, "pxa255") == 0
2925 || strcmp(variant, "pxa26x") == 0)
2927 else if (strcmp(variant, "pxa27x") == 0
2928 || strcmp(variant, "ixp42x") == 0
2929 || strcmp(variant, "ixp45x") == 0
2930 || strcmp(variant, "ixp46x") == 0)
2932 else if (strcmp(variant, "pxa3xx") == 0)
2935 LOG_WARNING("%s: unrecognized variant %s",
2936 tap->dotted_name, variant);
2938 if (ir_length && ir_length != tap->ir_length) {
2939 LOG_WARNING("%s: IR length for %s is %d; fixing",
2940 tap->dotted_name, variant, ir_length);
2941 tap->ir_length = ir_length;
2945 /* PXA3xx shifts the JTAG instructions */
2946 if (tap->ir_length == 11)
2947 xscale->xscale_variant = XSCALE_PXA3XX;
2949 xscale->xscale_variant = XSCALE_IXP4XX_PXA2XX;
2951 /* the debug handler isn't installed (and thus not running) at this time */
2952 xscale->handler_address = 0xfe000800;
2954 /* clear the vectors we keep locally for reference */
2955 memset(xscale->low_vectors, 0, sizeof(xscale->low_vectors));
2956 memset(xscale->high_vectors, 0, sizeof(xscale->high_vectors));
2958 /* no user-specified vectors have been configured yet */
2959 xscale->static_low_vectors_set = 0x0;
2960 xscale->static_high_vectors_set = 0x0;
2962 /* calculate branches to debug handler */
2963 low_reset_branch = (xscale->handler_address + 0x20 - 0x0 - 0x8) >> 2;
2964 high_reset_branch = (xscale->handler_address + 0x20 - 0xffff0000 - 0x8) >> 2;
2966 xscale->low_vectors[0] = ARMV4_5_B((low_reset_branch & 0xffffff), 0);
2967 xscale->high_vectors[0] = ARMV4_5_B((high_reset_branch & 0xffffff), 0);
2969 for (i = 1; i <= 7; i++) {
2970 xscale->low_vectors[i] = ARMV4_5_B(0xfffffe, 0);
2971 xscale->high_vectors[i] = ARMV4_5_B(0xfffffe, 0);
2974 /* 64kB aligned region used for DCache cleaning */
2975 xscale->cache_clean_address = 0xfffe0000;
2977 xscale->hold_rst = 0;
2978 xscale->external_debug_break = 0;
2980 xscale->ibcr_available = 2;
2981 xscale->ibcr0_used = 0;
2982 xscale->ibcr1_used = 0;
2984 xscale->dbr_available = 2;
2985 xscale->dbr0_used = 0;
2986 xscale->dbr1_used = 0;
2988 LOG_INFO("%s: hardware has 2 breakpoints and 2 watchpoints",
2989 target_name(target));
2991 xscale->arm_bkpt = ARMV5_BKPT(0x0);
2992 xscale->thumb_bkpt = ARMV5_T_BKPT(0x0) & 0xffff;
2994 xscale->vector_catch = 0x1;
2996 xscale->trace.data = NULL;
2997 xscale->trace.image = NULL;
2998 xscale->trace.mode = XSCALE_TRACE_DISABLED;
2999 xscale->trace.buffer_fill = 0;
3000 xscale->trace.fill_counter = 0;
3002 /* prepare ARMv4/5 specific information */
3003 arm->arch_info = xscale;
3004 arm->core_type = ARM_MODE_ANY;
3005 arm->read_core_reg = xscale_read_core_reg;
3006 arm->write_core_reg = xscale_write_core_reg;
3007 arm->full_context = xscale_full_context;
3009 arm_init_arch_info(target, arm);
3011 xscale->armv4_5_mmu.armv4_5_cache.ctype = -1;
3012 xscale->armv4_5_mmu.get_ttb = xscale_get_ttb;
3013 xscale->armv4_5_mmu.read_memory = xscale_read_memory;
3014 xscale->armv4_5_mmu.write_memory = xscale_write_memory;
3015 xscale->armv4_5_mmu.disable_mmu_caches = xscale_disable_mmu_caches;
3016 xscale->armv4_5_mmu.enable_mmu_caches = xscale_enable_mmu_caches;
3017 xscale->armv4_5_mmu.has_tiny_pages = 1;
3018 xscale->armv4_5_mmu.mmu_enabled = 0;
3023 static int xscale_target_create(struct target *target, Jim_Interp *interp)
3025 struct xscale_common *xscale;
3027 if (sizeof xscale_debug_handler > 0x800) {
3028 LOG_ERROR("debug_handler.bin: larger than 2kb");
3032 xscale = calloc(1, sizeof(*xscale));
3036 return xscale_init_arch_info(target, xscale, target->tap,
3040 COMMAND_HANDLER(xscale_handle_debug_handler_command)
3042 struct target *target = NULL;
3043 struct xscale_common *xscale;
3045 uint32_t handler_address;
3048 return ERROR_COMMAND_SYNTAX_ERROR;
3050 target = get_target(CMD_ARGV[0]);
3051 if (target == NULL) {
3052 LOG_ERROR("target '%s' not defined", CMD_ARGV[0]);
3056 xscale = target_to_xscale(target);
3057 retval = xscale_verify_pointer(CMD_CTX, xscale);
3058 if (retval != ERROR_OK)
3061 COMMAND_PARSE_NUMBER(u32, CMD_ARGV[1], handler_address);
3063 if (((handler_address >= 0x800) && (handler_address <= 0x1fef800)) ||
3064 ((handler_address >= 0xfe000800) && (handler_address <= 0xfffff800)))
3065 xscale->handler_address = handler_address;
3068 "xscale debug_handler <address> must be between 0x800 and 0x1fef800 or between 0xfe000800 and 0xfffff800");
3075 COMMAND_HANDLER(xscale_handle_cache_clean_address_command)
3077 struct target *target = NULL;
3078 struct xscale_common *xscale;
3080 uint32_t cache_clean_address;
3083 return ERROR_COMMAND_SYNTAX_ERROR;
3085 target = get_target(CMD_ARGV[0]);
3086 if (target == NULL) {
3087 LOG_ERROR("target '%s' not defined", CMD_ARGV[0]);
3090 xscale = target_to_xscale(target);
3091 retval = xscale_verify_pointer(CMD_CTX, xscale);
3092 if (retval != ERROR_OK)
3095 COMMAND_PARSE_NUMBER(u32, CMD_ARGV[1], cache_clean_address);
3097 if (cache_clean_address & 0xffff)
3098 LOG_ERROR("xscale cache_clean_address <address> must be 64kb aligned");
3100 xscale->cache_clean_address = cache_clean_address;
3105 COMMAND_HANDLER(xscale_handle_cache_info_command)
3107 struct target *target = get_current_target(CMD_CTX);
3108 struct xscale_common *xscale = target_to_xscale(target);
3111 retval = xscale_verify_pointer(CMD_CTX, xscale);
3112 if (retval != ERROR_OK)
3115 return armv4_5_handle_cache_info_command(CMD_CTX, &xscale->armv4_5_mmu.armv4_5_cache);
3118 static int xscale_virt2phys(struct target *target,
3119 uint32_t virtual, uint32_t *physical)
3121 struct xscale_common *xscale = target_to_xscale(target);
3124 if (xscale->common_magic != XSCALE_COMMON_MAGIC) {
3125 LOG_ERROR(xscale_not);
3126 return ERROR_TARGET_INVALID;
3130 int retval = armv4_5_mmu_translate_va(target, &xscale->armv4_5_mmu,
3131 virtual, &cb, &ret);
3132 if (retval != ERROR_OK)
3138 static int xscale_mmu(struct target *target, int *enabled)
3140 struct xscale_common *xscale = target_to_xscale(target);
3142 if (target->state != TARGET_HALTED) {
3143 LOG_ERROR("Target not halted");
3144 return ERROR_TARGET_INVALID;
3146 *enabled = xscale->armv4_5_mmu.mmu_enabled;
3150 COMMAND_HANDLER(xscale_handle_mmu_command)
3152 struct target *target = get_current_target(CMD_CTX);
3153 struct xscale_common *xscale = target_to_xscale(target);
3156 retval = xscale_verify_pointer(CMD_CTX, xscale);
3157 if (retval != ERROR_OK)
3160 if (target->state != TARGET_HALTED) {
3161 command_print(CMD_CTX, "target must be stopped for \"%s\" command", CMD_NAME);
3165 if (CMD_ARGC >= 1) {
3167 COMMAND_PARSE_ENABLE(CMD_ARGV[0], enable);
3169 xscale_enable_mmu_caches(target, 1, 0, 0);
3171 xscale_disable_mmu_caches(target, 1, 0, 0);
3172 xscale->armv4_5_mmu.mmu_enabled = enable;
3175 command_print(CMD_CTX, "mmu %s",
3176 (xscale->armv4_5_mmu.mmu_enabled) ? "enabled" : "disabled");
3181 COMMAND_HANDLER(xscale_handle_idcache_command)
3183 struct target *target = get_current_target(CMD_CTX);
3184 struct xscale_common *xscale = target_to_xscale(target);
3186 int retval = xscale_verify_pointer(CMD_CTX, xscale);
3187 if (retval != ERROR_OK)
3190 if (target->state != TARGET_HALTED) {
3191 command_print(CMD_CTX, "target must be stopped for \"%s\" command", CMD_NAME);
3195 bool icache = false;
3196 if (strcmp(CMD_NAME, "icache") == 0)
3198 if (CMD_ARGC >= 1) {
3200 COMMAND_PARSE_ENABLE(CMD_ARGV[0], enable);
3202 xscale->armv4_5_mmu.armv4_5_cache.i_cache_enabled = enable;
3204 xscale_enable_mmu_caches(target, 0, 0, 1);
3206 xscale_disable_mmu_caches(target, 0, 0, 1);
3208 xscale->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled = enable;
3210 xscale_enable_mmu_caches(target, 0, 1, 0);
3212 xscale_disable_mmu_caches(target, 0, 1, 0);
3216 bool enabled = icache ?
3217 xscale->armv4_5_mmu.armv4_5_cache.i_cache_enabled :
3218 xscale->armv4_5_mmu.armv4_5_cache.d_u_cache_enabled;
3219 const char *msg = enabled ? "enabled" : "disabled";
3220 command_print(CMD_CTX, "%s %s", CMD_NAME, msg);
3225 static const struct {
3229 { "fiq", DCSR_TF, },
3230 { "irq", DCSR_TI, },
3231 { "dabt", DCSR_TD, },
3232 { "pabt", DCSR_TA, },
3233 { "swi", DCSR_TS, },
3234 { "undef", DCSR_TU, },
3235 { "reset", DCSR_TR, },
3238 COMMAND_HANDLER(xscale_handle_vector_catch_command)
3240 struct target *target = get_current_target(CMD_CTX);
3241 struct xscale_common *xscale = target_to_xscale(target);
3243 uint32_t dcsr_value;
3245 struct reg *dcsr_reg = &xscale->reg_cache->reg_list[XSCALE_DCSR];
3247 retval = xscale_verify_pointer(CMD_CTX, xscale);
3248 if (retval != ERROR_OK)
3251 dcsr_value = buf_get_u32(dcsr_reg->value, 0, 32);
3253 if (CMD_ARGC == 1) {
3254 if (strcmp(CMD_ARGV[0], "all") == 0) {
3255 catch = DCSR_TRAP_MASK;
3257 } else if (strcmp(CMD_ARGV[0], "none") == 0) {
3262 while (CMD_ARGC-- > 0) {
3264 for (i = 0; i < ARRAY_SIZE(vec_ids); i++) {
3265 if (strcmp(CMD_ARGV[CMD_ARGC], vec_ids[i].name))
3267 catch |= vec_ids[i].mask;
3270 if (i == ARRAY_SIZE(vec_ids)) {
3271 LOG_ERROR("No vector '%s'", CMD_ARGV[CMD_ARGC]);
3272 return ERROR_COMMAND_SYNTAX_ERROR;
3275 *(uint32_t *)(dcsr_reg->value) &= ~DCSR_TRAP_MASK;
3276 *(uint32_t *)(dcsr_reg->value) |= catch;
3277 xscale_write_dcsr(target, -1, -1);
3280 dcsr_value = buf_get_u32(dcsr_reg->value, 0, 32);
3281 for (unsigned i = 0; i < ARRAY_SIZE(vec_ids); i++) {
3282 command_print(CMD_CTX, "%15s: %s", vec_ids[i].name,
3283 (dcsr_value & vec_ids[i].mask) ? "catch" : "ignore");
3290 COMMAND_HANDLER(xscale_handle_vector_table_command)
3292 struct target *target = get_current_target(CMD_CTX);
3293 struct xscale_common *xscale = target_to_xscale(target);
3297 retval = xscale_verify_pointer(CMD_CTX, xscale);
3298 if (retval != ERROR_OK)
3301 if (CMD_ARGC == 0) { /* print current settings */
3304 command_print(CMD_CTX, "active user-set static vectors:");
3305 for (idx = 1; idx < 8; idx++)
3306 if (xscale->static_low_vectors_set & (1 << idx))
3307 command_print(CMD_CTX,
3308 "low %d: 0x%" PRIx32,
3310 xscale->static_low_vectors[idx]);
3311 for (idx = 1; idx < 8; idx++)
3312 if (xscale->static_high_vectors_set & (1 << idx))
3313 command_print(CMD_CTX,
3314 "high %d: 0x%" PRIx32,
3316 xscale->static_high_vectors[idx]);
3324 COMMAND_PARSE_NUMBER(int, CMD_ARGV[1], idx);
3326 COMMAND_PARSE_NUMBER(u32, CMD_ARGV[2], vec);
3328 if (idx < 1 || idx >= 8)
3331 if (!err && strcmp(CMD_ARGV[0], "low") == 0) {
3332 xscale->static_low_vectors_set |= (1<<idx);
3333 xscale->static_low_vectors[idx] = vec;
3334 } else if (!err && (strcmp(CMD_ARGV[0], "high") == 0)) {
3335 xscale->static_high_vectors_set |= (1<<idx);
3336 xscale->static_high_vectors[idx] = vec;
3342 return ERROR_COMMAND_SYNTAX_ERROR;
3348 COMMAND_HANDLER(xscale_handle_trace_buffer_command)
3350 struct target *target = get_current_target(CMD_CTX);
3351 struct xscale_common *xscale = target_to_xscale(target);
3352 uint32_t dcsr_value;
3355 retval = xscale_verify_pointer(CMD_CTX, xscale);
3356 if (retval != ERROR_OK)
3359 if (target->state != TARGET_HALTED) {
3360 command_print(CMD_CTX, "target must be stopped for \"%s\" command", CMD_NAME);
3364 if (CMD_ARGC >= 1) {
3365 if (strcmp("enable", CMD_ARGV[0]) == 0)
3366 xscale->trace.mode = XSCALE_TRACE_WRAP; /* default */
3367 else if (strcmp("disable", CMD_ARGV[0]) == 0)
3368 xscale->trace.mode = XSCALE_TRACE_DISABLED;
3370 return ERROR_COMMAND_SYNTAX_ERROR;
3373 if (CMD_ARGC >= 2 && xscale->trace.mode != XSCALE_TRACE_DISABLED) {
3374 if (strcmp("fill", CMD_ARGV[1]) == 0) {
3375 int buffcount = 1; /* default */
3377 COMMAND_PARSE_NUMBER(int, CMD_ARGV[2], buffcount);
3378 if (buffcount < 1) { /* invalid */
3379 command_print(CMD_CTX, "fill buffer count must be > 0");
3380 xscale->trace.mode = XSCALE_TRACE_DISABLED;
3381 return ERROR_COMMAND_SYNTAX_ERROR;
3383 xscale->trace.buffer_fill = buffcount;
3384 xscale->trace.mode = XSCALE_TRACE_FILL;
3385 } else if (strcmp("wrap", CMD_ARGV[1]) == 0)
3386 xscale->trace.mode = XSCALE_TRACE_WRAP;
3388 xscale->trace.mode = XSCALE_TRACE_DISABLED;
3389 return ERROR_COMMAND_SYNTAX_ERROR;
3393 if (xscale->trace.mode != XSCALE_TRACE_DISABLED) {
3394 char fill_string[12];
3395 sprintf(fill_string, "fill %d", xscale->trace.buffer_fill);
3396 command_print(CMD_CTX, "trace buffer enabled (%s)",
3397 (xscale->trace.mode == XSCALE_TRACE_FILL)
3398 ? fill_string : "wrap");
3400 command_print(CMD_CTX, "trace buffer disabled");
3402 dcsr_value = buf_get_u32(xscale->reg_cache->reg_list[XSCALE_DCSR].value, 0, 32);
3403 if (xscale->trace.mode == XSCALE_TRACE_FILL)
3404 xscale_write_dcsr_sw(target, (dcsr_value & 0xfffffffc) | 2);
3406 xscale_write_dcsr_sw(target, dcsr_value & 0xfffffffc);
3411 COMMAND_HANDLER(xscale_handle_trace_image_command)
3413 struct target *target = get_current_target(CMD_CTX);
3414 struct xscale_common *xscale = target_to_xscale(target);
3418 return ERROR_COMMAND_SYNTAX_ERROR;
3420 retval = xscale_verify_pointer(CMD_CTX, xscale);
3421 if (retval != ERROR_OK)
3424 if (xscale->trace.image) {
3425 image_close(xscale->trace.image);
3426 free(xscale->trace.image);
3427 command_print(CMD_CTX, "previously loaded image found and closed");
3430 xscale->trace.image = malloc(sizeof(struct image));
3431 xscale->trace.image->base_address_set = 0;
3432 xscale->trace.image->start_address_set = 0;
3434 /* a base address isn't always necessary, default to 0x0 (i.e. don't relocate) */
3435 if (CMD_ARGC >= 2) {
3436 xscale->trace.image->base_address_set = 1;
3437 COMMAND_PARSE_NUMBER(llong, CMD_ARGV[1], xscale->trace.image->base_address);
3439 xscale->trace.image->base_address_set = 0;
3441 if (image_open(xscale->trace.image, CMD_ARGV[0],
3442 (CMD_ARGC >= 3) ? CMD_ARGV[2] : NULL) != ERROR_OK) {
3443 free(xscale->trace.image);
3444 xscale->trace.image = NULL;
3451 COMMAND_HANDLER(xscale_handle_dump_trace_command)
3453 struct target *target = get_current_target(CMD_CTX);
3454 struct xscale_common *xscale = target_to_xscale(target);
3455 struct xscale_trace_data *trace_data;
3459 retval = xscale_verify_pointer(CMD_CTX, xscale);
3460 if (retval != ERROR_OK)
3463 if (target->state != TARGET_HALTED) {
3464 command_print(CMD_CTX, "target must be stopped for \"%s\" command", CMD_NAME);
3469 return ERROR_COMMAND_SYNTAX_ERROR;
3471 trace_data = xscale->trace.data;
3474 command_print(CMD_CTX, "no trace data collected");
3478 if (fileio_open(&file, CMD_ARGV[0], FILEIO_WRITE, FILEIO_BINARY) != ERROR_OK)
3481 while (trace_data) {
3484 fileio_write_u32(&file, trace_data->chkpt0);
3485 fileio_write_u32(&file, trace_data->chkpt1);
3486 fileio_write_u32(&file, trace_data->last_instruction);
3487 fileio_write_u32(&file, trace_data->depth);
3489 for (i = 0; i < trace_data->depth; i++)
3490 fileio_write_u32(&file, trace_data->entries[i].data |
3491 ((trace_data->entries[i].type & 0xffff) << 16));
3493 trace_data = trace_data->next;
3496 fileio_close(&file);
3501 COMMAND_HANDLER(xscale_handle_analyze_trace_buffer_command)
3503 struct target *target = get_current_target(CMD_CTX);
3504 struct xscale_common *xscale = target_to_xscale(target);
3507 retval = xscale_verify_pointer(CMD_CTX, xscale);
3508 if (retval != ERROR_OK)
3511 xscale_analyze_trace(target, CMD_CTX);
3516 COMMAND_HANDLER(xscale_handle_cp15)
3518 struct target *target = get_current_target(CMD_CTX);
3519 struct xscale_common *xscale = target_to_xscale(target);
3522 retval = xscale_verify_pointer(CMD_CTX, xscale);
3523 if (retval != ERROR_OK)
3526 if (target->state != TARGET_HALTED) {
3527 command_print(CMD_CTX, "target must be stopped for \"%s\" command", CMD_NAME);
3530 uint32_t reg_no = 0;
3531 struct reg *reg = NULL;
3533 COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], reg_no);
3534 /*translate from xscale cp15 register no to openocd register*/
3537 reg_no = XSCALE_MAINID;
3540 reg_no = XSCALE_CTRL;
3543 reg_no = XSCALE_TTB;
3546 reg_no = XSCALE_DAC;
3549 reg_no = XSCALE_FSR;
3552 reg_no = XSCALE_FAR;
3555 reg_no = XSCALE_PID;
3558 reg_no = XSCALE_CPACCESS;
3561 command_print(CMD_CTX, "invalid register number");
3562 return ERROR_COMMAND_SYNTAX_ERROR;
3564 reg = &xscale->reg_cache->reg_list[reg_no];
3567 if (CMD_ARGC == 1) {
3570 /* read cp15 control register */
3571 xscale_get_reg(reg);
3572 value = buf_get_u32(reg->value, 0, 32);
3573 command_print(CMD_CTX, "%s (/%i): 0x%" PRIx32 "", reg->name, (int)(reg->size),
3575 } else if (CMD_ARGC == 2) {
3577 COMMAND_PARSE_NUMBER(u32, CMD_ARGV[1], value);
3579 /* send CP write request (command 0x41) */
3580 xscale_send_u32(target, 0x41);
3582 /* send CP register number */
3583 xscale_send_u32(target, reg_no);
3585 /* send CP register value */
3586 xscale_send_u32(target, value);
3588 /* execute cpwait to ensure outstanding operations complete */
3589 xscale_send_u32(target, 0x53);
3591 return ERROR_COMMAND_SYNTAX_ERROR;
3596 static const struct command_registration xscale_exec_command_handlers[] = {
3598 .name = "cache_info",
3599 .handler = xscale_handle_cache_info_command,
3600 .mode = COMMAND_EXEC,
3601 .help = "display information about CPU caches",
3605 .handler = xscale_handle_mmu_command,
3606 .mode = COMMAND_EXEC,
3607 .help = "enable or disable the MMU",
3608 .usage = "['enable'|'disable']",
3612 .handler = xscale_handle_idcache_command,
3613 .mode = COMMAND_EXEC,
3614 .help = "display ICache state, optionally enabling or "
3616 .usage = "['enable'|'disable']",
3620 .handler = xscale_handle_idcache_command,
3621 .mode = COMMAND_EXEC,
3622 .help = "display DCache state, optionally enabling or "
3624 .usage = "['enable'|'disable']",
3627 .name = "vector_catch",
3628 .handler = xscale_handle_vector_catch_command,
3629 .mode = COMMAND_EXEC,
3630 .help = "set or display mask of vectors "
3631 "that should trigger debug entry",
3632 .usage = "['all'|'none'|'fiq'|'irq'|'dabt'|'pabt'|'swi'|'undef'|'reset']",
3635 .name = "vector_table",
3636 .handler = xscale_handle_vector_table_command,
3637 .mode = COMMAND_EXEC,
3638 .help = "set vector table entry in mini-ICache, "
3639 "or display current tables",
3640 .usage = "[('high'|'low') index code]",
3643 .name = "trace_buffer",
3644 .handler = xscale_handle_trace_buffer_command,
3645 .mode = COMMAND_EXEC,
3646 .help = "display trace buffer status, enable or disable "
3647 "tracing, and optionally reconfigure trace mode",
3648 .usage = "['enable'|'disable' ['fill' [number]|'wrap']]",
3651 .name = "dump_trace",
3652 .handler = xscale_handle_dump_trace_command,
3653 .mode = COMMAND_EXEC,
3654 .help = "dump content of trace buffer to file",
3655 .usage = "filename",
3658 .name = "analyze_trace",
3659 .handler = xscale_handle_analyze_trace_buffer_command,
3660 .mode = COMMAND_EXEC,
3661 .help = "analyze content of trace buffer",
3665 .name = "trace_image",
3666 .handler = xscale_handle_trace_image_command,
3667 .mode = COMMAND_EXEC,
3668 .help = "load image from file to address (default 0)",
3669 .usage = "filename [offset [filetype]]",
3673 .handler = xscale_handle_cp15,
3674 .mode = COMMAND_EXEC,
3675 .help = "Read or write coprocessor 15 register.",
3676 .usage = "register [value]",
3678 COMMAND_REGISTRATION_DONE
3680 static const struct command_registration xscale_any_command_handlers[] = {
3682 .name = "debug_handler",
3683 .handler = xscale_handle_debug_handler_command,
3684 .mode = COMMAND_ANY,
3685 .help = "Change address used for debug handler.",
3686 .usage = "<target> <address>",
3689 .name = "cache_clean_address",
3690 .handler = xscale_handle_cache_clean_address_command,
3691 .mode = COMMAND_ANY,
3692 .help = "Change address used for cleaning data cache.",
3696 .chain = xscale_exec_command_handlers,
3698 COMMAND_REGISTRATION_DONE
3700 static const struct command_registration xscale_command_handlers[] = {
3702 .chain = arm_command_handlers,
3706 .mode = COMMAND_ANY,
3707 .help = "xscale command group",
3709 .chain = xscale_any_command_handlers,
3711 COMMAND_REGISTRATION_DONE
3714 struct target_type xscale_target = {
3717 .poll = xscale_poll,
3718 .arch_state = xscale_arch_state,
3720 .halt = xscale_halt,
3721 .resume = xscale_resume,
3722 .step = xscale_step,
3724 .assert_reset = xscale_assert_reset,
3725 .deassert_reset = xscale_deassert_reset,
3727 /* REVISIT on some cores, allow exporting iwmmxt registers ... */
3728 .get_gdb_reg_list = arm_get_gdb_reg_list,
3730 .read_memory = xscale_read_memory,
3731 .read_phys_memory = xscale_read_phys_memory,
3732 .write_memory = xscale_write_memory,
3733 .write_phys_memory = xscale_write_phys_memory,
3735 .checksum_memory = arm_checksum_memory,
3736 .blank_check_memory = arm_blank_check_memory,
3738 .run_algorithm = armv4_5_run_algorithm,
3740 .add_breakpoint = xscale_add_breakpoint,
3741 .remove_breakpoint = xscale_remove_breakpoint,
3742 .add_watchpoint = xscale_add_watchpoint,
3743 .remove_watchpoint = xscale_remove_watchpoint,
3745 .commands = xscale_command_handlers,
3746 .target_create = xscale_target_create,
3747 .init_target = xscale_init_target,
3749 .virt2phys = xscale_virt2phys,