?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Change tap_state naming to be consistent with SVF documentation.
[openocd.git] / src / target / cortex_swjdp.c
blob974ced02284e18663b80a70acbb152fddedd7582
1 /***************************************************************************
2 * Copyright (C) 2006 by Magnus Lundin *
3 * lundin@mlu.mine.nu *
4 * *
5 * Copyright (C) 2008 by Spencer Oliver *
6 * spen@spen-soft.co.uk *
7 * *
8 * This program is free software; you can redistribute it and/or modify *
9 * it under the terms of the GNU General Public License as published by *
10 * the Free Software Foundation; either version 2 of the License, or *
11 * (at your option) any later version. *
12 * *
13 * This program is distributed in the hope that it will be useful, *
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
16 * GNU General Public License for more details. *
17 * *
18 * You should have received a copy of the GNU General Public License *
19 * along with this program; if not, write to the *
20 * Free Software Foundation, Inc., *
21 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
22 ***************************************************************************/
23 /***************************************************************************
24 * *
25 * CoreSight (Light?) SerialWireJtagDebugPort *
26 * *
27 * CoreSight(tm) DAP-Lite TRM, ARM DDI 0316A *
28 * Cortex-M3(tm) TRM, ARM DDI 0337C *
29 * *
30 ***************************************************************************/
31 #ifdef HAVE_CONFIG_H
32 #include "config.h"
33 #endif
34
35 #include "replacements.h"
36
37 #include "cortex_m3.h"
38 #include "cortex_swjdp.h"
39 #include "jtag.h"
40 #include "log.h"
41 #include "time_support.h"
42 #include <stdlib.h>
43
44 /*
45 * Transaction Mode:
46 * swjdp->trans_mode = TRANS_MODE_COMPOSITE;
47 * Uses Overrun checking mode and does not do actual JTAG send/receive or transaction
48 * result checking until swjdp_end_transaction()
49 * This must be done before using or deallocating any return variables.
50 * swjdp->trans_mode == TRANS_MODE_ATOMIC
51 * All reads and writes to the AHB bus are checked for valid completion, and return values
52 * are immediatley available.
53 */
54
55 /***************************************************************************
56 * *
57 * DPACC and APACC scanchain access through JTAG-DR *
58 * *
59 ***************************************************************************/
60
61 /* Scan out and in from target ordered u8 buffers */
62 int swjdp_scan(arm_jtag_t *jtag_info, u8 instr, u8 reg_addr, u8 RnW, u8 *outvalue, u8 *invalue, u8 *ack)
63 {
64 scan_field_t fields[2];
65 u8 out_addr_buf;
66
67 jtag_add_end_state(TAP_IDLE);
68 arm_jtag_set_instr(jtag_info, instr, NULL);
69
70 fields[0].tap = jtag_info->tap;
71 fields[0].num_bits = 3;
72 buf_set_u32(&out_addr_buf, 0, 3, ((reg_addr >> 1) & 0x6) | (RnW & 0x1));
73 fields[0].out_value = &out_addr_buf;
74 fields[0].out_mask = NULL;
75 fields[0].in_value = ack;
76 fields[0].in_check_value = NULL;
77 fields[0].in_check_mask = NULL;
78 fields[0].in_handler = NULL;
79 fields[0].in_handler_priv = NULL;
80
81 fields[1].tap = jtag_info->tap;
82 fields[1].num_bits = 32;
83 fields[1].out_value = outvalue;
84 fields[1].out_mask = NULL;
85 fields[1].in_value = invalue;
86 fields[1].in_handler = NULL;
87 fields[1].in_handler_priv = NULL;
88 fields[1].in_check_value = NULL;
89 fields[1].in_check_mask = NULL;
90
91 jtag_add_dr_scan(2, fields, -1);
92
93 return ERROR_OK;
94 }
95
96 /* Scan out and in from host ordered u32 variables */
97 int swjdp_scan_u32(arm_jtag_t *jtag_info, u8 instr, u8 reg_addr, u8 RnW, u32 outvalue, u32 *invalue, u8 *ack)
98 {
99 scan_field_t fields[2];
100 u8 out_value_buf[4];
101 u8 out_addr_buf;
102
103 jtag_add_end_state(TAP_IDLE);
104 arm_jtag_set_instr(jtag_info, instr, NULL);
105
106 fields[0].tap = jtag_info->tap;
107 fields[0].num_bits = 3;
108 buf_set_u32(&out_addr_buf, 0, 3, ((reg_addr >> 1) & 0x6) | (RnW & 0x1));
109 fields[0].out_value = &out_addr_buf;
110 fields[0].out_mask = NULL;
111 fields[0].in_value = ack;
112 fields[0].in_check_value = NULL;
113 fields[0].in_check_mask = NULL;
114 fields[0].in_handler = NULL;
115 fields[0].in_handler_priv = NULL;
116
117 fields[1].tap = jtag_info->tap;
118 fields[1].num_bits = 32;
119 buf_set_u32(out_value_buf, 0, 32, outvalue);
120 fields[1].out_value = out_value_buf;
121 fields[1].out_mask = NULL;
122 fields[1].in_value = NULL;
123 if (invalue)
124 {
125 fields[1].in_handler = arm_jtag_buf_to_u32;
126 fields[1].in_handler_priv = invalue;
127 }
128 else
129 {
130 fields[1].in_handler = NULL;
131 fields[1].in_handler_priv = NULL;
132 }
133 fields[1].in_check_value = NULL;
134 fields[1].in_check_mask = NULL;
135
136 jtag_add_dr_scan(2, fields, -1);
137
138 return ERROR_OK;
139 }
140
141 /* scan_inout_check adds one extra inscan for DPAP_READ commands to read variables */
142 int scan_inout_check(swjdp_common_t *swjdp, u8 instr, u8 reg_addr, u8 RnW, u8 *outvalue, u8 *invalue)
143 {
144 swjdp_scan(swjdp->jtag_info, instr, reg_addr, RnW, outvalue, NULL, NULL);
145 if ((RnW == DPAP_READ) && (invalue != NULL))
146 {
147 swjdp_scan(swjdp->jtag_info, SWJDP_IR_DPACC, DP_RDBUFF, DPAP_READ, 0, invalue, &swjdp->ack);
148 }
149
150 /* In TRANS_MODE_ATOMIC all SWJDP_IR_APACC transactions wait for ack=OK/FAULT and the check CTRL_STAT */
151 if ((instr == SWJDP_IR_APACC) && (swjdp->trans_mode == TRANS_MODE_ATOMIC))
152 {
153 return swjdp_transaction_endcheck(swjdp);
154 }
155
156 return ERROR_OK;
157 }
158
159 int scan_inout_check_u32(swjdp_common_t *swjdp, u8 instr, u8 reg_addr, u8 RnW, u32 outvalue, u32 *invalue)
160 {
161 swjdp_scan_u32(swjdp->jtag_info, instr, reg_addr, RnW, outvalue, NULL, NULL);
162 if ((RnW==DPAP_READ) && (invalue != NULL))
163 {
164 swjdp_scan_u32(swjdp->jtag_info, SWJDP_IR_DPACC, DP_RDBUFF, DPAP_READ, 0, invalue, &swjdp->ack);
165 }
166
167 /* In TRANS_MODE_ATOMIC all SWJDP_IR_APACC transactions wait for ack=OK/FAULT and then check CTRL_STAT */
168 if ((instr == SWJDP_IR_APACC) && (swjdp->trans_mode == TRANS_MODE_ATOMIC))
169 {
170 return swjdp_transaction_endcheck(swjdp);
171 }
172
173 return ERROR_OK;
174 }
175
176 int swjdp_transaction_endcheck(swjdp_common_t *swjdp)
177 {
178 int retval;
179 u32 ctrlstat;
180
181 keep_alive();
182
183 /* Danger!!!! BROKEN!!!! */
184 scan_inout_check_u32(swjdp, SWJDP_IR_DPACC, DP_CTRL_STAT, DPAP_READ, 0, &ctrlstat);
185 /* Danger!!!! BROKEN!!!! Why will jtag_execute_queue() fail here????
186 R956 introduced the check on return value here and now Michael Schwingen reports
187 that this code no longer works....
188
189 https://lists.berlios.de/pipermail/openocd-development/2008-September/003107.html
190 */
191 if ((retval=jtag_execute_queue())!=ERROR_OK)
192 {
193 LOG_ERROR("BUG: Why does this fail the first time????");
194 }
195 /* Why??? second time it works??? */
196 scan_inout_check_u32(swjdp, SWJDP_IR_DPACC, DP_CTRL_STAT, DPAP_READ, 0, &ctrlstat);
197 if ((retval=jtag_execute_queue())!=ERROR_OK)
198 return retval;
199
200 swjdp->ack = swjdp->ack & 0x7;
201
202 long long then=timeval_ms();
203 while (swjdp->ack != 2)
204 {
205 if (swjdp->ack == 1)
206 {
207 if ((timeval_ms()-then) > 1000)
208 {
209 LOG_WARNING("Timeout (1000ms) waiting for ACK = OK/FAULT in SWJDP transaction");
210 return ERROR_JTAG_DEVICE_ERROR;
211 }
212 }
213 else
214 {
215 LOG_WARNING("Invalid ACK in SWJDP transaction");
216 return ERROR_JTAG_DEVICE_ERROR;
217 }
218
219 scan_inout_check_u32(swjdp, SWJDP_IR_DPACC, DP_CTRL_STAT, DPAP_READ, 0, &ctrlstat);
220 if ((retval=jtag_execute_queue())!=ERROR_OK)
221 return retval;
222 swjdp->ack = swjdp->ack & 0x7;
223 }
224
225 /* Check for STICKYERR and STICKYORUN */
226 if (ctrlstat & (SSTICKYORUN | SSTICKYERR))
227 {
228 LOG_DEBUG("swjdp: CTRL/STAT error 0x%x", ctrlstat);
229 /* Check power to debug regions */
230 if ((ctrlstat & 0xf0000000) != 0xf0000000)
231 {
232 ahbap_debugport_init(swjdp);
233 }
234 else
235 {
236 u32 dcb_dhcsr,nvic_shcsr, nvic_bfar, nvic_cfsr;
237
238 if (ctrlstat & SSTICKYORUN)
239 LOG_ERROR("SWJ-DP OVERRUN - check clock or reduce jtag speed");
240
241 if (ctrlstat & SSTICKYERR)
242 LOG_ERROR("SWJ-DP STICKY ERROR");
243
244 /* Clear Sticky Error Bits */
245 scan_inout_check_u32(swjdp, SWJDP_IR_DPACC, DP_CTRL_STAT, DPAP_WRITE, swjdp->dp_ctrl_stat | SSTICKYORUN | SSTICKYERR, NULL);
246 scan_inout_check_u32(swjdp, SWJDP_IR_DPACC, DP_CTRL_STAT, DPAP_READ, 0, &ctrlstat);
247 if ((retval=jtag_execute_queue())!=ERROR_OK)
248 return retval;
249
250 LOG_DEBUG("swjdp: status 0x%x", ctrlstat);
251
252 /* Can we find out the reason for the error ?? */
253 ahbap_read_system_atomic_u32(swjdp, DCB_DHCSR, &dcb_dhcsr);
254 ahbap_read_system_atomic_u32(swjdp, NVIC_SHCSR, &nvic_shcsr);
255 ahbap_read_system_atomic_u32(swjdp, NVIC_CFSR, &nvic_cfsr);
256 ahbap_read_system_atomic_u32(swjdp, NVIC_BFAR, &nvic_bfar);
257 LOG_ERROR("dcb_dhcsr 0x%x, nvic_shcsr 0x%x, nvic_cfsr 0x%x, nvic_bfar 0x%x", dcb_dhcsr, nvic_shcsr, nvic_cfsr, nvic_bfar);
258 }
259 if ((retval=jtag_execute_queue())!=ERROR_OK)
260 return retval;
261 return ERROR_JTAG_DEVICE_ERROR;
262 }
263
264 return ERROR_OK;
265 }
266
267 /***************************************************************************
268 * *
269 * DP and AHB-AP register access through APACC and DPACC *
270 * *
271 ***************************************************************************/
272
273 int swjdp_write_dpacc(swjdp_common_t *swjdp, u32 value, u8 reg_addr)
274 {
275 return scan_inout_check_u32(swjdp, SWJDP_IR_DPACC, reg_addr, DPAP_WRITE, value, NULL);
276 }
277
278 int swjdp_read_dpacc(swjdp_common_t *swjdp, u32 *value, u8 reg_addr)
279 {
280 return scan_inout_check_u32(swjdp, SWJDP_IR_DPACC, reg_addr, DPAP_READ, 0, value);
281 }
282
283 int swjdp_bankselect_apacc(swjdp_common_t *swjdp,u32 reg_addr)
284 {
285 u32 select;
286 select = (reg_addr & 0xFF0000F0);
287
288 if (select != swjdp->dp_select_value)
289 {
290 swjdp_write_dpacc(swjdp, select, DP_SELECT);
291 swjdp->dp_select_value = select;
292 }
293
294 return ERROR_OK;
295 }
296
297 int ahbap_write_reg(swjdp_common_t *swjdp, u32 reg_addr, u8* out_value_buf)
298 {
299 swjdp_bankselect_apacc(swjdp, reg_addr);
300 scan_inout_check(swjdp, SWJDP_IR_APACC, reg_addr, DPAP_WRITE, out_value_buf, NULL);
301
302 return ERROR_OK;
303 }
304
305 int ahbap_read_reg(swjdp_common_t *swjdp, u32 reg_addr, u8 *in_value_buf)
306 {
307 swjdp_bankselect_apacc(swjdp, reg_addr);
308 scan_inout_check(swjdp, SWJDP_IR_APACC, reg_addr, DPAP_READ, 0, in_value_buf);
309
310 return ERROR_OK;
311 }
312 int ahbap_write_reg_u32(swjdp_common_t *swjdp, u32 reg_addr, u32 value)
313 {
314 u8 out_value_buf[4];
315
316 buf_set_u32(out_value_buf, 0, 32, value);
317 swjdp_bankselect_apacc(swjdp, reg_addr);
318 scan_inout_check(swjdp, SWJDP_IR_APACC, reg_addr, DPAP_WRITE, out_value_buf, NULL);
319
320 return ERROR_OK;
321 }
322
323 int ahbap_read_reg_u32(swjdp_common_t *swjdp, u32 reg_addr, u32 *value)
324 {
325 swjdp_bankselect_apacc(swjdp, reg_addr);
326 scan_inout_check_u32(swjdp, SWJDP_IR_APACC, reg_addr, DPAP_READ, 0, value);
327
328 return ERROR_OK;
329 }
330
331 /***************************************************************************
332 * *
333 * AHB-AP access to memory and system registers on AHB bus *
334 * *
335 ***************************************************************************/
336
337 int ahbap_setup_accessport(swjdp_common_t *swjdp, u32 csw, u32 tar)
338 {
339 csw = csw | CSW_DBGSWENABLE | CSW_MASTER_DEBUG | CSW_HPROT;
340 if (csw != swjdp->ap_csw_value)
341 {
342 /* LOG_DEBUG("swjdp : Set CSW %x",csw); */
343 ahbap_write_reg_u32(swjdp, AHBAP_CSW, csw );
344 swjdp->ap_csw_value = csw;
345 }
346 if (tar != swjdp->ap_tar_value)
347 {
348 /* LOG_DEBUG("swjdp : Set TAR %x",tar); */
349 ahbap_write_reg_u32(swjdp, AHBAP_TAR, tar );
350 swjdp->ap_tar_value = tar;
351 }
352 if (csw & CSW_ADDRINC_MASK)
353 {
354 /* Do not cache TAR value when autoincrementing */
355 swjdp->ap_tar_value = -1;
356 }
357 return ERROR_OK;
358 }
359
360 /*****************************************************************************
361 * *
362 * ahbap_read_system_u32(swjdp_common_t *swjdp, u32 address, u32 *value) *
363 * *
364 * Read a u32 value from memory or system register *
365 * Functionally equivalent to target_read_u32(target, address, u32 *value), *
366 * but with less overhead *
367 *****************************************************************************/
368 int ahbap_read_system_u32(swjdp_common_t *swjdp, u32 address, u32 *value)
369 {
370 swjdp->trans_mode = TRANS_MODE_COMPOSITE;
371
372 ahbap_setup_accessport(swjdp, CSW_32BIT | CSW_ADDRINC_OFF, address & 0xFFFFFFF0);
373 ahbap_read_reg_u32(swjdp, AHBAP_BD0 | (address & 0xC), value );
374
375 return ERROR_OK;
376 }
377
378 int ahbap_read_system_atomic_u32(swjdp_common_t *swjdp, u32 address, u32 *value)
379 {
380 ahbap_read_system_u32(swjdp, address, value);
381
382 return swjdp_transaction_endcheck(swjdp);
383 }
384
385 /*****************************************************************************
386 * *
387 * ahbap_write_system_u32(swjdp_common_t *swjdp, u32 address, u32 value) *
388 * *
389 * Write a u32 value to memory or system register *
390 * *
391 *****************************************************************************/
392 int ahbap_write_system_u32(swjdp_common_t *swjdp, u32 address, u32 value)
393 {
394 swjdp->trans_mode = TRANS_MODE_COMPOSITE;
395
396 ahbap_setup_accessport(swjdp, CSW_32BIT | CSW_ADDRINC_OFF, address & 0xFFFFFFF0);
397 ahbap_write_reg_u32(swjdp, AHBAP_BD0 | (address & 0xC), value );
398
399 return ERROR_OK;
400 }
401
402 int ahbap_write_system_atomic_u32(swjdp_common_t *swjdp, u32 address, u32 value)
403 {
404 ahbap_write_system_u32(swjdp, address, value);
405
406 return swjdp_transaction_endcheck(swjdp);
407 }
408
409 /*****************************************************************************
410 * *
411 * ahbap_write_buf(swjdp_common_t *swjdp, u8 *buffer, int count, u32 address) *
412 * *
413 * Write a buffer in target order (little endian) *
414 * *
415 *****************************************************************************/
416 int ahbap_write_buf_u32(swjdp_common_t *swjdp, u8 *buffer, int count, u32 address)
417 {
418 u32 outvalue;
419 int wcount, blocksize, writecount, errorcount = 0, retval = ERROR_OK;
420 u32 adr = address;
421 u8* pBuffer = buffer;
422
423 swjdp->trans_mode = TRANS_MODE_COMPOSITE;
424
425 count >>= 2;
426 wcount = count;
427
428 /* if we have an unaligned access - reorder data */
429 if (adr & 0x3u)
430 {
431 for (writecount = 0; writecount < count; writecount++)
432 {
433 int i;
434 outvalue = *((u32*)pBuffer);
435
436 for (i = 0; i < 4; i++ )
437 {
438 *((u8*)pBuffer + (adr & 0x3)) = outvalue;
439 outvalue >>= 8;
440 adr++;
441 }
442 pBuffer += 4;
443 }
444 }
445
446 while (wcount > 0)
447 {
448 /* Adjust to write blocks within 4K aligned boundaries */
449 blocksize = (0x1000 - (0xFFF & address)) >> 2;
450 if (wcount < blocksize)
451 blocksize = wcount;
452
453 /* handle unaligned data at 4k boundary */
454 if (blocksize == 0)
455 blocksize = 1;
456
457 ahbap_setup_accessport(swjdp, CSW_32BIT | CSW_ADDRINC_SINGLE, address);
458
459 for (writecount = 0; writecount < blocksize; writecount++)
460 {
461 ahbap_write_reg(swjdp, AHBAP_DRW, buffer + 4 * writecount );
462 }
463
464 if (swjdp_transaction_endcheck(swjdp) == ERROR_OK)
465 {
466 wcount = wcount - blocksize;
467 address = address + 4 * blocksize;
468 buffer = buffer + 4 * blocksize;
469 }
470 else
471 {
472 errorcount++;
473 }
474
475 if (errorcount > 1)
476 {
477 LOG_WARNING("Block write error address 0x%x, wcount 0x%x", address, wcount);
478 return ERROR_JTAG_DEVICE_ERROR;
479 }
480 }
481
482 return retval;
483 }
484
485 int ahbap_write_buf_packed_u16(swjdp_common_t *swjdp, u8 *buffer, int count, u32 address)
486 {
487 u32 outvalue;
488 int retval = ERROR_OK;
489 int wcount, blocksize, writecount, i;
490
491 swjdp->trans_mode = TRANS_MODE_COMPOSITE;
492
493 wcount = count >> 1;
494
495 while (wcount > 0)
496 {
497 int nbytes;
498
499 /* Adjust to read within 4K block boundaries */
500 blocksize = (0x1000 - (0xFFF & address)) >> 1;
501
502 if (wcount < blocksize)
503 blocksize = wcount;
504
505 /* handle unaligned data at 4k boundary */
506 if (blocksize == 0)
507 blocksize = 1;
508
509 ahbap_setup_accessport(swjdp, CSW_16BIT | CSW_ADDRINC_PACKED, address);
510 writecount = blocksize;
511
512 do
513 {
514 nbytes = MIN((writecount << 1), 4);
515
516 if (nbytes < 4 )
517 {
518 if (ahbap_write_buf_u16(swjdp, buffer, nbytes, address) != ERROR_OK)
519 {
520 LOG_WARNING("Block read error address 0x%x, count 0x%x", address, count);
521 return ERROR_JTAG_DEVICE_ERROR;
522 }
523
524 address += nbytes >> 1;
525 }
526 else
527 {
528 outvalue = *((u32*)buffer);
529
530 for (i = 0; i < nbytes; i++ )
531 {
532 *((u8*)buffer + (address & 0x3)) = outvalue;
533 outvalue >>= 8;
534 address++;
535 }
536
537 outvalue = *((u32*)buffer);
538 ahbap_write_reg_u32(swjdp, AHBAP_DRW, outvalue);
539 if (swjdp_transaction_endcheck(swjdp) != ERROR_OK)
540 {
541 LOG_WARNING("Block read error address 0x%x, count 0x%x", address, count);
542 return ERROR_JTAG_DEVICE_ERROR;
543 }
544 }
545
546 buffer += nbytes >> 1;
547 writecount -= nbytes >> 1;
548
549 } while (writecount);
550 wcount -= blocksize;
551 }
552
553 return retval;
554 }
555
556 int ahbap_write_buf_u16(swjdp_common_t *swjdp, u8 *buffer, int count, u32 address)
557 {
558 u32 outvalue;
559 int retval = ERROR_OK;
560
561 if (count >= 4)
562 return ahbap_write_buf_packed_u16(swjdp, buffer, count, address);
563
564 swjdp->trans_mode = TRANS_MODE_COMPOSITE;
565
566 while (count > 0)
567 {
568 ahbap_setup_accessport(swjdp, CSW_16BIT | CSW_ADDRINC_SINGLE, address);
569 outvalue = *((u16*)buffer) << 8 * (address & 0x3);
570 ahbap_write_reg_u32(swjdp, AHBAP_DRW, outvalue );
571 retval = swjdp_transaction_endcheck(swjdp);
572 count -= 2;
573 address += 2;
574 buffer += 2;
575 }
576
577 return retval;
578 }
579
580 int ahbap_write_buf_packed_u8(swjdp_common_t *swjdp, u8 *buffer, int count, u32 address)
581 {
582 u32 outvalue;
583 int retval = ERROR_OK;
584 int wcount, blocksize, writecount, i;
585
586 swjdp->trans_mode = TRANS_MODE_COMPOSITE;
587
588 wcount = count;
589
590 while (wcount > 0)
591 {
592 int nbytes;
593
594 /* Adjust to read within 4K block boundaries */
595 blocksize = (0x1000 - (0xFFF & address));
596
597 if (wcount < blocksize)
598 blocksize = wcount;
599
600 ahbap_setup_accessport(swjdp, CSW_8BIT | CSW_ADDRINC_PACKED, address);
601 writecount = blocksize;
602
603 do
604 {
605 nbytes = MIN(writecount, 4);
606
607 if (nbytes < 4 )
608 {
609 if (ahbap_write_buf_u8(swjdp, buffer, nbytes, address) != ERROR_OK)
610 {
611 LOG_WARNING("Block read error address 0x%x, count 0x%x", address, count);
612 return ERROR_JTAG_DEVICE_ERROR;
613 }
614
615 address += nbytes;
616 }
617 else
618 {
619 outvalue = *((u32*)buffer);
620
621 for (i = 0; i < nbytes; i++ )
622 {
623 *((u8*)buffer + (address & 0x3)) = outvalue;
624 outvalue >>= 8;
625 address++;
626 }
627
628 outvalue = *((u32*)buffer);
629 ahbap_write_reg_u32(swjdp, AHBAP_DRW, outvalue);
630 if (swjdp_transaction_endcheck(swjdp) != ERROR_OK)
631 {
632 LOG_WARNING("Block read error address 0x%x, count 0x%x", address, count);
633 return ERROR_JTAG_DEVICE_ERROR;
634 }
635 }
636
637 buffer += nbytes;
638 writecount -= nbytes;
639
640 } while (writecount);
641 wcount -= blocksize;
642 }
643
644 return retval;
645 }
646
647 int ahbap_write_buf_u8(swjdp_common_t *swjdp, u8 *buffer, int count, u32 address)
648 {
649 u32 outvalue;
650 int retval = ERROR_OK;
651
652 if (count >= 4)
653 return ahbap_write_buf_packed_u8(swjdp, buffer, count, address);
654
655 swjdp->trans_mode = TRANS_MODE_COMPOSITE;
656
657 while (count > 0)
658 {
659 ahbap_setup_accessport(swjdp, CSW_8BIT | CSW_ADDRINC_SINGLE, address);
660 outvalue = *((u8*)buffer) << 8 * (address & 0x3);
661 ahbap_write_reg_u32(swjdp, AHBAP_DRW, outvalue );
662 retval = swjdp_transaction_endcheck(swjdp);
663 count--;
664 address++;
665 buffer++;
666 }
667
668 return retval;
669 }
670
671 /*********************************************************************************
672 * *
673 * ahbap_read_buf_u32(swjdp_common_t *swjdp, u8 *buffer, int count, u32 address) *
674 * *
675 * Read block fast in target order (little endian) into a buffer *
676 * *
677 **********************************************************************************/
678 int ahbap_read_buf_u32(swjdp_common_t *swjdp, u8 *buffer, int count, u32 address)
679 {
680 int wcount, blocksize, readcount, errorcount = 0, retval = ERROR_OK;
681 u32 adr = address;
682 u8* pBuffer = buffer;
683
684 swjdp->trans_mode = TRANS_MODE_COMPOSITE;
685
686 count >>= 2;
687 wcount = count;
688
689 while (wcount > 0)
690 {
691 /* Adjust to read within 4K block boundaries */
692 blocksize = (0x1000 - (0xFFF & address)) >> 2;
693 if (wcount < blocksize)
694 blocksize = wcount;
695
696 /* handle unaligned data at 4k boundary */
697 if (blocksize == 0)
698 blocksize = 1;
699
700 ahbap_setup_accessport(swjdp, CSW_32BIT | CSW_ADDRINC_SINGLE, address);
701
702 /* Scan out first read */
703 swjdp_scan(swjdp->jtag_info, SWJDP_IR_APACC, AHBAP_DRW, DPAP_READ, 0, NULL, NULL);
704 for (readcount = 0; readcount < blocksize - 1; readcount++)
705 {
706 /* Scan out read instruction and scan in previous value */
707 swjdp_scan(swjdp->jtag_info, SWJDP_IR_APACC, AHBAP_DRW, DPAP_READ, 0, buffer + 4 * readcount, &swjdp->ack);
708 }
709
710 /* Scan in last value */
711 swjdp_scan(swjdp->jtag_info, SWJDP_IR_DPACC, DP_RDBUFF, DPAP_READ, 0, buffer + 4 * readcount, &swjdp->ack);
712 if (swjdp_transaction_endcheck(swjdp) == ERROR_OK)
713 {
714 wcount = wcount - blocksize;
715 address += 4 * blocksize;
716 buffer += 4 * blocksize;
717 }
718 else
719 {
720 errorcount++;
721 }
722
723 if (errorcount > 1)
724 {
725 LOG_WARNING("Block read error address 0x%x, count 0x%x", address, count);
726 return ERROR_JTAG_DEVICE_ERROR;
727 }
728 }
729
730 /* if we have an unaligned access - reorder data */
731 if (adr & 0x3u)
732 {
733 for (readcount = 0; readcount < count; readcount++)
734 {
735 int i;
736 u32 data = *((u32*)pBuffer);
737
738 for (i = 0; i < 4; i++ )
739 {
740 *((u8*)pBuffer) = (data >> 8 * (adr & 0x3));
741 pBuffer++;
742 adr++;
743 }
744 }
745 }
746
747 return retval;
748 }
749
750 int ahbap_read_buf_packed_u16(swjdp_common_t *swjdp, u8 *buffer, int count, u32 address)
751 {
752 u32 invalue;
753 int retval = ERROR_OK;
754 int wcount, blocksize, readcount, i;
755
756 swjdp->trans_mode = TRANS_MODE_COMPOSITE;
757
758 wcount = count >> 1;
759
760 while (wcount > 0)
761 {
762 int nbytes;
763
764 /* Adjust to read within 4K block boundaries */
765 blocksize = (0x1000 - (0xFFF & address)) >> 1;
766 if (wcount < blocksize)
767 blocksize = wcount;
768
769 ahbap_setup_accessport(swjdp, CSW_16BIT | CSW_ADDRINC_PACKED, address);
770
771 /* handle unaligned data at 4k boundary */
772 if (blocksize == 0)
773 blocksize = 1;
774 readcount = blocksize;
775
776 do
777 {
778 ahbap_read_reg_u32(swjdp, AHBAP_DRW, &invalue );
779 if (swjdp_transaction_endcheck(swjdp) != ERROR_OK)
780 {
781 LOG_WARNING("Block read error address 0x%x, count 0x%x", address, count);
782 return ERROR_JTAG_DEVICE_ERROR;
783 }
784
785 nbytes = MIN((readcount << 1), 4);
786
787 for (i = 0; i < nbytes; i++ )
788 {
789 *((u8*)buffer) = (invalue >> 8 * (address & 0x3));
790 buffer++;
791 address++;
792 }
793
794 readcount -= (nbytes >> 1);
795 } while (readcount);
796 wcount -= blocksize;
797 }
798
799 return retval;
800 }
801
802 int ahbap_read_buf_u16(swjdp_common_t *swjdp, u8 *buffer, int count, u32 address)
803 {
804 u32 invalue, i;
805 int retval = ERROR_OK;
806
807 if (count >= 4)
808 return ahbap_read_buf_packed_u16(swjdp, buffer, count, address);
809
810 swjdp->trans_mode = TRANS_MODE_COMPOSITE;
811
812 while (count > 0)
813 {
814 ahbap_setup_accessport(swjdp, CSW_16BIT | CSW_ADDRINC_SINGLE, address);
815 ahbap_read_reg_u32(swjdp, AHBAP_DRW, &invalue );
816 retval = swjdp_transaction_endcheck(swjdp);
817 if (address & 0x1)
818 {
819 for (i = 0; i < 2; i++ )
820 {
821 *((u8*)buffer) = (invalue >> 8 * (address & 0x3));
822 buffer++;
823 address++;
824 }
825 }
826 else
827 {
828 *((u16*)buffer) = (invalue >> 8 * (address & 0x3));
829 address += 2;
830 buffer += 2;
831 }
832 count -= 2;
833 }
834
835 return retval;
836 }
837
838 int ahbap_read_buf_packed_u8(swjdp_common_t *swjdp, u8 *buffer, int count, u32 address)
839 {
840 u32 invalue;
841 int retval = ERROR_OK;
842 int wcount, blocksize, readcount, i;
843
844 swjdp->trans_mode = TRANS_MODE_COMPOSITE;
845
846 wcount = count;
847
848 while (wcount > 0)
849 {
850 int nbytes;
851
852 /* Adjust to read within 4K block boundaries */
853 blocksize = (0x1000 - (0xFFF & address));
854
855 if (wcount < blocksize)
856 blocksize = wcount;
857
858 ahbap_setup_accessport(swjdp, CSW_8BIT | CSW_ADDRINC_PACKED, address);
859 readcount = blocksize;
860
861 do
862 {
863 ahbap_read_reg_u32(swjdp, AHBAP_DRW, &invalue );
864 if (swjdp_transaction_endcheck(swjdp) != ERROR_OK)
865 {
866 LOG_WARNING("Block read error address 0x%x, count 0x%x", address, count);
867 return ERROR_JTAG_DEVICE_ERROR;
868 }
869
870 nbytes = MIN(readcount, 4);
871
872 for (i = 0; i < nbytes; i++ )
873 {
874 *((u8*)buffer) = (invalue >> 8 * (address & 0x3));
875 buffer++;
876 address++;
877 }
878
879 readcount -= nbytes;
880 } while (readcount);
881 wcount -= blocksize;
882 }
883
884 return retval;
885 }
886
887 int ahbap_read_buf_u8(swjdp_common_t *swjdp, u8 *buffer, int count, u32 address)
888 {
889 u32 invalue;
890 int retval = ERROR_OK;
891
892 if (count >= 4)
893 return ahbap_read_buf_packed_u8(swjdp, buffer, count, address);
894
895 swjdp->trans_mode = TRANS_MODE_COMPOSITE;
896
897 while (count > 0)
898 {
899 ahbap_setup_accessport(swjdp, CSW_8BIT | CSW_ADDRINC_SINGLE, address);
900 ahbap_read_reg_u32(swjdp, AHBAP_DRW, &invalue );
901 retval = swjdp_transaction_endcheck(swjdp);
902 *((u8*)buffer) = (invalue >> 8 * (address & 0x3));
903 count--;
904 address++;
905 buffer++;
906 }
907
908 return retval;
909 }
910
911 int ahbap_read_coreregister_u32(swjdp_common_t *swjdp, u32 *value, int regnum)
912 {
913 int retval;
914 u32 dcrdr;
915
916 /* because the DCB_DCRDR is used for the emulated dcc channel
917 * we gave to save/restore the DCB_DCRDR when used */
918
919 ahbap_read_system_atomic_u32(swjdp, DCB_DCRDR, &dcrdr);
920
921 swjdp->trans_mode = TRANS_MODE_COMPOSITE;
922
923 /* ahbap_write_system_u32(swjdp, DCB_DCRSR, regnum); */
924 ahbap_setup_accessport(swjdp, CSW_32BIT | CSW_ADDRINC_OFF, DCB_DCRSR & 0xFFFFFFF0);
925 ahbap_write_reg_u32(swjdp, AHBAP_BD0 | (DCB_DCRSR & 0xC), regnum );
926
927 /* ahbap_read_system_u32(swjdp, DCB_DCRDR, value); */
928 ahbap_setup_accessport(swjdp, CSW_32BIT | CSW_ADDRINC_OFF, DCB_DCRDR & 0xFFFFFFF0);
929 ahbap_read_reg_u32(swjdp, AHBAP_BD0 | (DCB_DCRDR & 0xC), value );
930
931 retval = swjdp_transaction_endcheck(swjdp);
932 ahbap_write_system_atomic_u32(swjdp, DCB_DCRDR, dcrdr);
933 return retval;
934 }
935
936 int ahbap_write_coreregister_u32(swjdp_common_t *swjdp, u32 value, int regnum)
937 {
938 int retval;
939 u32 dcrdr;
940
941 /* because the DCB_DCRDR is used for the emulated dcc channel
942 * we gave to save/restore the DCB_DCRDR when used */
943
944 ahbap_read_system_atomic_u32(swjdp, DCB_DCRDR, &dcrdr);
945
946 swjdp->trans_mode = TRANS_MODE_COMPOSITE;
947
948 /* ahbap_write_system_u32(swjdp, DCB_DCRDR, core_regs[i]); */
949 ahbap_setup_accessport(swjdp, CSW_32BIT | CSW_ADDRINC_OFF, DCB_DCRDR & 0xFFFFFFF0);
950 ahbap_write_reg_u32(swjdp, AHBAP_BD0 | (DCB_DCRDR & 0xC), value );
951
952 /* ahbap_write_system_u32(swjdp, DCB_DCRSR, i | DCRSR_WnR ); */
953 ahbap_setup_accessport(swjdp, CSW_32BIT | CSW_ADDRINC_OFF, DCB_DCRSR & 0xFFFFFFF0);
954 ahbap_write_reg_u32(swjdp, AHBAP_BD0 | (DCB_DCRSR & 0xC), regnum | DCRSR_WnR );
955
956 retval = swjdp_transaction_endcheck(swjdp);
957 ahbap_write_system_atomic_u32(swjdp, DCB_DCRDR, dcrdr);
958 return retval;
959 }
960
961 int ahbap_debugport_init(swjdp_common_t *swjdp)
962 {
963 u32 idreg, romaddr, dummy;
964 u32 ctrlstat;
965 int cnt = 0;
966 int retval;
967
968 LOG_DEBUG(" ");
969
970 swjdp->ap_csw_value = -1;
971 swjdp->ap_tar_value = -1;
972 swjdp->trans_mode = TRANS_MODE_ATOMIC;
973 swjdp_read_dpacc(swjdp, &dummy, DP_CTRL_STAT);
974 swjdp_write_dpacc(swjdp, SSTICKYERR, DP_CTRL_STAT);
975 swjdp_read_dpacc(swjdp, &dummy, DP_CTRL_STAT);
976
977 swjdp->dp_ctrl_stat = CDBGPWRUPREQ | CSYSPWRUPREQ;
978
979 swjdp_write_dpacc(swjdp, swjdp->dp_ctrl_stat, DP_CTRL_STAT);
980 swjdp_read_dpacc(swjdp, &ctrlstat, DP_CTRL_STAT);
981 if ((retval=jtag_execute_queue())!=ERROR_OK)
982 return retval;
983
984 /* Check that we have debug power domains activated */
985 while (!(ctrlstat & CDBGPWRUPACK) && (cnt++ < 10))
986 {
987 LOG_DEBUG("swjdp: wait CDBGPWRUPACK");
988 swjdp_read_dpacc(swjdp, &ctrlstat, DP_CTRL_STAT);
989 if ((retval=jtag_execute_queue())!=ERROR_OK)
990 return retval;
991 alive_sleep(10);
992 }
993
994 while (!(ctrlstat & CSYSPWRUPACK) && (cnt++ < 10))
995 {
996 LOG_DEBUG("swjdp: wait CSYSPWRUPACK");
997 swjdp_read_dpacc(swjdp, &ctrlstat, DP_CTRL_STAT);
998 if ((retval=jtag_execute_queue())!=ERROR_OK)
999 return retval;
1000 alive_sleep(10);
1001 }
1002
1003 swjdp_read_dpacc(swjdp, &dummy, DP_CTRL_STAT);
1004 /* With debug power on we can activate OVERRUN checking */
1005 swjdp->dp_ctrl_stat = CDBGPWRUPREQ | CSYSPWRUPREQ | CORUNDETECT;
1006 swjdp_write_dpacc(swjdp, swjdp->dp_ctrl_stat, DP_CTRL_STAT);
1007 swjdp_read_dpacc(swjdp, &dummy, DP_CTRL_STAT);
1008
1009 ahbap_read_reg_u32(swjdp, 0xFC, &idreg);
1010 ahbap_read_reg_u32(swjdp, 0xF8, &romaddr);
1011
1012 LOG_DEBUG("AHB-AP ID Register 0x%x, Debug ROM Address 0x%x", idreg, romaddr);
1013
1014 return ERROR_OK;
1015 }
Official OpenOCD Mirror