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TCL/SPEAr: move DDR activation in common code
[openocd/dsp568013.git] / src / target / arm9tdmi.c
blob5c2fd9d14e5acd67c2bd0f3a33a7f11968d333d5
1 /***************************************************************************
2 * Copyright (C) 2005 by Dominic Rath *
3 * Dominic.Rath@gmx.de *
4 * *
5 * Copyright (C) 2008 by Spencer Oliver *
6 * spen@spen-soft.co.uk *
7 * *
8 * Copyright (C) 2008 by Hongtao Zheng *
9 * hontor@126.com *
10 * *
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. *
15 * *
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. *
20 * *
21 * You should have received a copy of the GNU General Public License *
22 * along with this program; if not, write to the *
23 * Free Software Foundation, Inc., *
24 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
25 ***************************************************************************/
26 #ifdef HAVE_CONFIG_H
27 #include "config.h"
28 #endif
29
30 #include "arm9tdmi.h"
31 #include "target_type.h"
32 #include "register.h"
33 #include "arm_opcodes.h"
34
35
36 /*
37 * NOTE: this holds code that's used with multiple ARM9 processors:
38 * - ARM9TDMI (ARMv4T) ... in ARM920, ARM922, and ARM940 cores
39 * - ARM9E-S (ARMv5TE) ... in ARM946, ARM966, and ARM968 cores
40 * - ARM9EJS (ARMv5TEJ) ... in ARM926 core
41 *
42 * In short, the file name is a misnomer ... it is NOT specific to
43 * that first generation ARM9 processor, or cores using it.
44 */
45
46 #if 0
47 #define _DEBUG_INSTRUCTION_EXECUTION_
48 #endif
49
50 enum arm9tdmi_vector_bit
51 {
52 ARM9TDMI_RESET_VECTOR = 0x01,
53 ARM9TDMI_UNDEF_VECTOR = 0x02,
54 ARM9TDMI_SWI_VECTOR = 0x04,
55 ARM9TDMI_PABT_VECTOR = 0x08,
56 ARM9TDMI_DABT_VECTOR = 0x10,
57 /* BIT(5) reserved -- must be zero */
58 ARM9TDMI_IRQ_VECTOR = 0x40,
59 ARM9TDMI_FIQ_VECTOR = 0x80,
60 };
61
62 static const struct arm9tdmi_vector {
63 const char *name;
64 uint32_t value;
65 } arm9tdmi_vectors[] = {
66 {"reset", ARM9TDMI_RESET_VECTOR},
67 {"undef", ARM9TDMI_UNDEF_VECTOR},
68 {"swi", ARM9TDMI_SWI_VECTOR},
69 {"pabt", ARM9TDMI_PABT_VECTOR},
70 {"dabt", ARM9TDMI_DABT_VECTOR},
71 {"irq", ARM9TDMI_IRQ_VECTOR},
72 {"fiq", ARM9TDMI_FIQ_VECTOR},
73 {0, 0},
74 };
75
76 int arm9tdmi_examine_debug_reason(struct target *target)
77 {
78 int retval = ERROR_OK;
79 struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
80
81 /* only check the debug reason if we don't know it already */
82 if ((target->debug_reason != DBG_REASON_DBGRQ)
83 && (target->debug_reason != DBG_REASON_SINGLESTEP))
84 {
85 struct scan_field fields[3];
86 uint8_t databus[4];
87 uint8_t instructionbus[4];
88 uint8_t debug_reason;
89
90 fields[0].num_bits = 32;
91 fields[0].out_value = NULL;
92 fields[0].in_value = databus;
93
94 fields[1].num_bits = 3;
95 fields[1].out_value = NULL;
96 fields[1].in_value = &debug_reason;
97
98 fields[2].num_bits = 32;
99 fields[2].out_value = NULL;
100 fields[2].in_value = instructionbus;
101
102 if ((retval = arm_jtag_scann(&arm7_9->jtag_info, 0x1, TAP_DRPAUSE)) != ERROR_OK)
103 {
104 return retval;
105 }
106 retval = arm_jtag_set_instr(&arm7_9->jtag_info, arm7_9->jtag_info.intest_instr, NULL, TAP_DRPAUSE);
107 if (retval != ERROR_OK)
108 return retval;
109
110 jtag_add_dr_scan(arm7_9->jtag_info.tap, 3, fields, TAP_DRPAUSE);
111 if ((retval = jtag_execute_queue()) != ERROR_OK)
112 {
113 return retval;
114 }
115
116 fields[0].in_value = NULL;
117 fields[0].out_value = databus;
118 fields[1].in_value = NULL;
119 fields[1].out_value = &debug_reason;
120 fields[2].in_value = NULL;
121 fields[2].out_value = instructionbus;
122
123 jtag_add_dr_scan(arm7_9->jtag_info.tap, 3, fields, TAP_DRPAUSE);
124
125 if (debug_reason & 0x4)
126 if (debug_reason & 0x2)
127 target->debug_reason = DBG_REASON_WPTANDBKPT;
128 else
129 target->debug_reason = DBG_REASON_WATCHPOINT;
130 else
131 target->debug_reason = DBG_REASON_BREAKPOINT;
132 }
133
134 return ERROR_OK;
135 }
136
137 /* put an instruction in the ARM9TDMI pipeline or write the data bus,
138 * and optionally read data
139 */
140 int arm9tdmi_clock_out(struct arm_jtag *jtag_info, uint32_t instr,
141 uint32_t out, uint32_t *in, int sysspeed)
142 {
143 int retval = ERROR_OK;
144 struct scan_field fields[3];
145 uint8_t out_buf[4];
146 uint8_t instr_buf[4];
147 uint8_t sysspeed_buf = 0x0;
148
149 /* prepare buffer */
150 buf_set_u32(out_buf, 0, 32, out);
151
152 buf_set_u32(instr_buf, 0, 32, flip_u32(instr, 32));
153
154 if (sysspeed)
155 buf_set_u32(&sysspeed_buf, 2, 1, 1);
156
157 if ((retval = arm_jtag_scann(jtag_info, 0x1, TAP_DRPAUSE)) != ERROR_OK)
158 {
159 return retval;
160 }
161
162 retval = arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, NULL, TAP_DRPAUSE);
163 if (retval != ERROR_OK)
164 return retval;
165
166 fields[0].num_bits = 32;
167 fields[0].out_value = out_buf;
168 fields[0].in_value = NULL;
169
170 fields[1].num_bits = 3;
171 fields[1].out_value = &sysspeed_buf;
172 fields[1].in_value = NULL;
173
174 fields[2].num_bits = 32;
175 fields[2].out_value = instr_buf;
176 fields[2].in_value = NULL;
177
178 if (in)
179 {
180 fields[0].in_value = (uint8_t *)in;
181 jtag_add_dr_scan(jtag_info->tap, 3, fields, TAP_DRPAUSE);
182
183 jtag_add_callback(arm_le_to_h_u32, (jtag_callback_data_t)in);
184 }
185 else
186 {
187 jtag_add_dr_scan(jtag_info->tap, 3, fields, TAP_DRPAUSE);
188 }
189
190 jtag_add_runtest(0, TAP_DRPAUSE);
191
192 #ifdef _DEBUG_INSTRUCTION_EXECUTION_
193 {
194 if ((retval = jtag_execute_queue()) != ERROR_OK)
195 {
196 return retval;
197 }
198
199 if (in)
200 {
201 LOG_DEBUG("instr: 0x%8.8x, out: 0x%8.8x, in: 0x%8.8x", instr, out, *in);
202 }
203 else
204 LOG_DEBUG("instr: 0x%8.8x, out: 0x%8.8x", instr, out);
205 }
206 #endif
207
208 return ERROR_OK;
209 }
210
211 /* just read data (instruction and data-out = don't care) */
212 int arm9tdmi_clock_data_in(struct arm_jtag *jtag_info, uint32_t *in)
213 {
214 int retval = ERROR_OK;;
215 struct scan_field fields[3];
216
217 if ((retval = arm_jtag_scann(jtag_info, 0x1, TAP_DRPAUSE)) != ERROR_OK)
218 {
219 return retval;
220 }
221
222 retval = arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, NULL, TAP_DRPAUSE);
223 if (retval != ERROR_OK)
224 return retval;
225
226 fields[0].num_bits = 32;
227 fields[0].out_value = NULL;
228 fields[0].in_value = (uint8_t *)in;
229
230 fields[1].num_bits = 3;
231 fields[1].out_value = NULL;
232 fields[1].in_value = NULL;
233
234 fields[2].num_bits = 32;
235 fields[2].out_value = NULL;
236 fields[2].in_value = NULL;
237
238 jtag_add_dr_scan(jtag_info->tap, 3, fields, TAP_DRPAUSE);
239
240 jtag_add_callback(arm_le_to_h_u32, (jtag_callback_data_t)in);
241
242 jtag_add_runtest(0, TAP_DRPAUSE);
243
244 #ifdef _DEBUG_INSTRUCTION_EXECUTION_
245 {
246 if ((retval = jtag_execute_queue()) != ERROR_OK)
247 {
248 return retval;
249 }
250
251 if (in)
252 {
253 LOG_DEBUG("in: 0x%8.8x", *in);
254 }
255 else
256 {
257 LOG_ERROR("BUG: called with in == NULL");
258 }
259 }
260 #endif
261
262 return ERROR_OK;
263 }
264
265 static int arm9endianness(jtag_callback_data_t arg,
266 jtag_callback_data_t size, jtag_callback_data_t be,
267 jtag_callback_data_t captured)
268 {
269 uint8_t *in = (uint8_t *)arg;
270
271 arm_endianness((uint8_t *)captured, in, (int)size, (int)be, 0);
272 return ERROR_OK;
273 }
274
275 /* clock the target, and read the databus
276 * the *in pointer points to a buffer where elements of 'size' bytes
277 * are stored in big (be == 1) or little (be == 0) endianness
278 */
279 int arm9tdmi_clock_data_in_endianness(struct arm_jtag *jtag_info,
280 void *in, int size, int be)
281 {
282 int retval = ERROR_OK;
283 struct scan_field fields[3];
284
285 if ((retval = arm_jtag_scann(jtag_info, 0x1, TAP_DRPAUSE)) != ERROR_OK)
286 {
287 return retval;
288 }
289
290 retval = arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, NULL, TAP_DRPAUSE);
291 if (retval != ERROR_OK)
292 return retval;
293
294 fields[0].num_bits = 32;
295 fields[0].out_value = NULL;
296 jtag_alloc_in_value32(&fields[0]);
297
298 fields[1].num_bits = 3;
299 fields[1].out_value = NULL;
300 fields[1].in_value = NULL;
301
302 fields[2].num_bits = 32;
303 fields[2].out_value = NULL;
304 fields[2].in_value = NULL;
305
306 jtag_add_dr_scan(jtag_info->tap, 3, fields, TAP_DRPAUSE);
307
308 jtag_add_callback4(arm9endianness, (jtag_callback_data_t)in, (jtag_callback_data_t)size, (jtag_callback_data_t)be, (jtag_callback_data_t)fields[0].in_value);
309
310 jtag_add_runtest(0, TAP_DRPAUSE);
311
312 #ifdef _DEBUG_INSTRUCTION_EXECUTION_
313 {
314 if ((retval = jtag_execute_queue()) != ERROR_OK)
315 {
316 return retval;
317 }
318
319 if (in)
320 {
321 LOG_DEBUG("in: 0x%8.8x", *(uint32_t*)in);
322 }
323 else
324 {
325 LOG_ERROR("BUG: called with in == NULL");
326 }
327 }
328 #endif
329
330 return ERROR_OK;
331 }
332
333 static void arm9tdmi_change_to_arm(struct target *target,
334 uint32_t *r0, uint32_t *pc)
335 {
336 int retval = ERROR_OK;
337 struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
338 struct arm_jtag *jtag_info = &arm7_9->jtag_info;
339
340 /* save r0 before using it and put system in ARM state
341 * to allow common handling of ARM and THUMB debugging */
342
343 /* fetch STR r0, [r0] */
344 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_STR(0, 0), 0, NULL, 0);
345 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, 0, NULL, 0);
346 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, 0, NULL, 0);
347 /* STR r0, [r0] in Memory */
348 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, 0, r0, 0);
349
350 /* MOV r0, r15 fetched, STR in Decode */
351 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_MOV(0, 15), 0, NULL, 0);
352 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, 0, NULL, 0);
353 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_STR(0, 0), 0, NULL, 0);
354 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, 0, NULL, 0);
355 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, 0, NULL, 0);
356 /* nothing fetched, STR r0, [r0] in Memory */
357 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, 0, pc, 0);
358
359 /* use pc-relative LDR to clear r0[1:0] (for switch to ARM mode) */
360 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_LDR_PCREL(0), 0, NULL, 0);
361 /* LDR in Decode */
362 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, 0, NULL, 0);
363 /* LDR in Execute */
364 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, 0, NULL, 0);
365 /* LDR in Memory (to account for interlock) */
366 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, 0, NULL, 0);
367
368 /* fetch BX */
369 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_BX(0), 0, NULL, 0);
370 /* NOP fetched, BX in Decode, MOV in Execute */
371 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, 0, NULL, 0);
372 /* NOP fetched, BX in Execute (1) */
373 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, 0, NULL, 0);
374
375 if ((retval = jtag_execute_queue()) != ERROR_OK)
376 {
377 return;
378 }
379
380 /* fix program counter:
381 * MOV r0, r15 was the 5th instruction (+8)
382 * reading PC in Thumb state gives address of instruction + 4
383 */
384 *pc -= 0xc;
385 }
386
387 void arm9tdmi_read_core_regs(struct target *target,
388 uint32_t mask, uint32_t* core_regs[16])
389 {
390 int i;
391 struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
392 struct arm_jtag *jtag_info = &arm7_9->jtag_info;
393
394 /* STMIA r0-15, [r0] at debug speed
395 * register values will start to appear on 4th DCLK
396 */
397 arm9tdmi_clock_out(jtag_info, ARMV4_5_STMIA(0, mask & 0xffff, 0, 0), 0, NULL, 0);
398
399 /* fetch NOP, STM in DECODE stage */
400 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
401 /* fetch NOP, STM in EXECUTE stage (1st cycle) */
402 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
403
404 for (i = 0; i <= 15; i++)
405 {
406 if (mask & (1 << i))
407 /* nothing fetched, STM in MEMORY (i'th cycle) */
408 arm9tdmi_clock_data_in(jtag_info, core_regs[i]);
409 }
410 }
411
412 static void arm9tdmi_read_core_regs_target_buffer(struct target *target,
413 uint32_t mask, void* buffer, int size)
414 {
415 int i;
416 struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
417 struct arm_jtag *jtag_info = &arm7_9->jtag_info;
418 int be = (target->endianness == TARGET_BIG_ENDIAN) ? 1 : 0;
419 uint32_t *buf_u32 = buffer;
420 uint16_t *buf_u16 = buffer;
421 uint8_t *buf_u8 = buffer;
422
423 /* STMIA r0-15, [r0] at debug speed
424 * register values will start to appear on 4th DCLK
425 */
426 arm9tdmi_clock_out(jtag_info, ARMV4_5_STMIA(0, mask & 0xffff, 0, 0), 0, NULL, 0);
427
428 /* fetch NOP, STM in DECODE stage */
429 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
430 /* fetch NOP, STM in EXECUTE stage (1st cycle) */
431 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
432
433 for (i = 0; i <= 15; i++)
434 {
435 if (mask & (1 << i))
436 /* nothing fetched, STM in MEMORY (i'th cycle) */
437 switch (size)
438 {
439 case 4:
440 arm9tdmi_clock_data_in_endianness(jtag_info, buf_u32++, 4, be);
441 break;
442 case 2:
443 arm9tdmi_clock_data_in_endianness(jtag_info, buf_u16++, 2, be);
444 break;
445 case 1:
446 arm9tdmi_clock_data_in_endianness(jtag_info, buf_u8++, 1, be);
447 break;
448 }
449 }
450 }
451
452 static void arm9tdmi_read_xpsr(struct target *target, uint32_t *xpsr, int spsr)
453 {
454 struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
455 struct arm_jtag *jtag_info = &arm7_9->jtag_info;
456
457 /* MRS r0, cpsr */
458 arm9tdmi_clock_out(jtag_info, ARMV4_5_MRS(0, spsr & 1), 0, NULL, 0);
459 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
460 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
461 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
462 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
463
464 /* STR r0, [r15] */
465 arm9tdmi_clock_out(jtag_info, ARMV4_5_STR(0, 15), 0, NULL, 0);
466 /* fetch NOP, STR in DECODE stage */
467 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
468 /* fetch NOP, STR in EXECUTE stage (1st cycle) */
469 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
470 /* nothing fetched, STR in MEMORY */
471 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, xpsr, 0);
472 }
473
474 static void arm9tdmi_write_xpsr(struct target *target, uint32_t xpsr, int spsr)
475 {
476 struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
477 struct arm_jtag *jtag_info = &arm7_9->jtag_info;
478
479 LOG_DEBUG("xpsr: %8.8" PRIx32 ", spsr: %i", xpsr, spsr);
480
481 /* MSR1 fetched */
482 arm9tdmi_clock_out(jtag_info, ARMV4_5_MSR_IM(xpsr & 0xff, 0, 1, spsr), 0, NULL, 0);
483 /* MSR2 fetched, MSR1 in DECODE */
484 arm9tdmi_clock_out(jtag_info, ARMV4_5_MSR_IM((xpsr & 0xff00) >> 8, 0xc, 2, spsr), 0, NULL, 0);
485 /* MSR3 fetched, MSR1 in EXECUTE (1), MSR2 in DECODE */
486 arm9tdmi_clock_out(jtag_info, ARMV4_5_MSR_IM((xpsr & 0xff0000) >> 16, 0x8, 4, spsr), 0, NULL, 0);
487 /* nothing fetched, MSR1 in EXECUTE (2) */
488 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
489 /* nothing fetched, MSR1 in EXECUTE (3) */
490 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
491 /* MSR4 fetched, MSR2 in EXECUTE (1), MSR3 in DECODE */
492 arm9tdmi_clock_out(jtag_info, ARMV4_5_MSR_IM((xpsr & 0xff000000) >> 24, 0x4, 8, spsr), 0, NULL, 0);
493 /* nothing fetched, MSR2 in EXECUTE (2) */
494 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
495 /* nothing fetched, MSR2 in EXECUTE (3) */
496 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
497 /* NOP fetched, MSR3 in EXECUTE (1), MSR4 in DECODE */
498 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
499 /* nothing fetched, MSR3 in EXECUTE (2) */
500 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
501 /* nothing fetched, MSR3 in EXECUTE (3) */
502 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
503 /* NOP fetched, MSR4 in EXECUTE (1) */
504 /* last MSR writes flags, which takes only one cycle */
505 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
506 }
507
508 static void arm9tdmi_write_xpsr_im8(struct target *target,
509 uint8_t xpsr_im, int rot, int spsr)
510 {
511 struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
512 struct arm_jtag *jtag_info = &arm7_9->jtag_info;
513
514 LOG_DEBUG("xpsr_im: %2.2x, rot: %i, spsr: %i", xpsr_im, rot, spsr);
515
516 /* MSR fetched */
517 arm9tdmi_clock_out(jtag_info, ARMV4_5_MSR_IM(xpsr_im, rot, 1, spsr), 0, NULL, 0);
518 /* NOP fetched, MSR in DECODE */
519 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
520 /* NOP fetched, MSR in EXECUTE (1) */
521 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
522
523 /* rot == 4 writes flags, which takes only one cycle */
524 if (rot != 4)
525 {
526 /* nothing fetched, MSR in EXECUTE (2) */
527 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
528 /* nothing fetched, MSR in EXECUTE (3) */
529 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
530 }
531 }
532
533 void arm9tdmi_write_core_regs(struct target *target,
534 uint32_t mask, uint32_t core_regs[16])
535 {
536 int i;
537 struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
538 struct arm_jtag *jtag_info = &arm7_9->jtag_info;
539
540 /* LDMIA r0-15, [r0] at debug speed
541 * register values will start to appear on 4th DCLK
542 */
543 arm9tdmi_clock_out(jtag_info, ARMV4_5_LDMIA(0, mask & 0xffff, 0, 0), 0, NULL, 0);
544
545 /* fetch NOP, LDM in DECODE stage */
546 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
547 /* fetch NOP, LDM in EXECUTE stage (1st cycle) */
548 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
549
550 for (i = 0; i <= 15; i++)
551 {
552 if (mask & (1 << i))
553 /* nothing fetched, LDM still in EXECUTE (1 + i cycle) */
554 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, core_regs[i], NULL, 0);
555 }
556 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
557 }
558
559 void arm9tdmi_load_word_regs(struct target *target, uint32_t mask)
560 {
561 struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
562 struct arm_jtag *jtag_info = &arm7_9->jtag_info;
563
564 /* put system-speed load-multiple into the pipeline */
565 arm9tdmi_clock_out(jtag_info, ARMV4_5_LDMIA(0, mask & 0xffff, 0, 1), 0, NULL, 0);
566 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 1);
567 }
568
569 void arm9tdmi_load_hword_reg(struct target *target, int num)
570 {
571 struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
572 struct arm_jtag *jtag_info = &arm7_9->jtag_info;
573
574 /* put system-speed load half-word into the pipeline */
575 arm9tdmi_clock_out(jtag_info, ARMV4_5_LDRH_IP(num, 0), 0, NULL, 0);
576 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 1);
577 }
578
579 void arm9tdmi_load_byte_reg(struct target *target, int num)
580 {
581 struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
582 struct arm_jtag *jtag_info = &arm7_9->jtag_info;
583
584 /* put system-speed load byte into the pipeline */
585 arm9tdmi_clock_out(jtag_info, ARMV4_5_LDRB_IP(num, 0), 0, NULL, 0);
586 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 1);
587 }
588
589 void arm9tdmi_store_word_regs(struct target *target, uint32_t mask)
590 {
591 struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
592 struct arm_jtag *jtag_info = &arm7_9->jtag_info;
593
594 /* put system-speed store-multiple into the pipeline */
595 arm9tdmi_clock_out(jtag_info, ARMV4_5_STMIA(0, mask, 0, 1), 0, NULL, 0);
596 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 1);
597 }
598
599 void arm9tdmi_store_hword_reg(struct target *target, int num)
600 {
601 struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
602 struct arm_jtag *jtag_info = &arm7_9->jtag_info;
603
604 /* put system-speed store half-word into the pipeline */
605 arm9tdmi_clock_out(jtag_info, ARMV4_5_STRH_IP(num, 0), 0, NULL, 0);
606 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 1);
607 }
608
609 void arm9tdmi_store_byte_reg(struct target *target, int num)
610 {
611 struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
612 struct arm_jtag *jtag_info = &arm7_9->jtag_info;
613
614 /* put system-speed store byte into the pipeline */
615 arm9tdmi_clock_out(jtag_info, ARMV4_5_STRB_IP(num, 0), 0, NULL, 0);
616 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 1);
617 }
618
619 static void arm9tdmi_write_pc(struct target *target, uint32_t pc)
620 {
621 struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
622 struct arm_jtag *jtag_info = &arm7_9->jtag_info;
623
624 /* LDMIA r0-15, [r0] at debug speed
625 * register values will start to appear on 4th DCLK
626 */
627 arm9tdmi_clock_out(jtag_info, ARMV4_5_LDMIA(0, 0x8000, 0, 0), 0, NULL, 0);
628
629 /* fetch NOP, LDM in DECODE stage */
630 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
631 /* fetch NOP, LDM in EXECUTE stage (1st cycle) */
632 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
633 /* nothing fetched, LDM in EXECUTE stage (2nd cycle) (output data) */
634 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, pc, NULL, 0);
635 /* nothing fetched, LDM in EXECUTE stage (3rd cycle) */
636 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
637 /* fetch NOP, LDM in EXECUTE stage (4th cycle) */
638 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
639 /* fetch NOP, LDM in EXECUTE stage (5th cycle) */
640 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
641 }
642
643 void arm9tdmi_branch_resume(struct target *target)
644 {
645 struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
646 struct arm_jtag *jtag_info = &arm7_9->jtag_info;
647
648 arm9tdmi_clock_out(jtag_info, ARMV4_5_B(0xfffffc, 0), 0, NULL, 0);
649 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 1);
650 }
651
652 static void arm9tdmi_branch_resume_thumb(struct target *target)
653 {
654 LOG_DEBUG("-");
655
656 struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
657 struct arm *armv4_5 = &arm7_9->armv4_5_common;
658 struct arm_jtag *jtag_info = &arm7_9->jtag_info;
659 struct reg *dbg_stat = &arm7_9->eice_cache->reg_list[EICE_DBG_STAT];
660
661 /* LDMIA r0-15, [r0] at debug speed
662 * register values will start to appear on 4th DCLK
663 */
664 arm9tdmi_clock_out(jtag_info, ARMV4_5_LDMIA(0, 0x1, 0, 0), 0, NULL, 0);
665
666 /* fetch NOP, LDM in DECODE stage */
667 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
668 /* fetch NOP, LDM in EXECUTE stage (1st cycle) */
669 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
670 /* nothing fetched, LDM in EXECUTE stage (2nd cycle) */
671 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP,
672 buf_get_u32(armv4_5->pc->value, 0, 32) | 1, NULL, 0);
673 /* nothing fetched, LDM in EXECUTE stage (3rd cycle) */
674 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
675
676 /* Branch and eXchange */
677 arm9tdmi_clock_out(jtag_info, ARMV4_5_BX(0), 0, NULL, 0);
678
679 embeddedice_read_reg(dbg_stat);
680
681 /* fetch NOP, BX in DECODE stage */
682 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
683
684 embeddedice_read_reg(dbg_stat);
685
686 /* fetch NOP, BX in EXECUTE stage (1st cycle) */
687 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
688
689 /* target is now in Thumb state */
690 embeddedice_read_reg(dbg_stat);
691
692 /* load r0 value, MOV_IM in Decode*/
693 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_LDR_PCREL(0), 0, NULL, 0);
694 /* fetch NOP, LDR in Decode, MOV_IM in Execute */
695 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, 0, NULL, 0);
696 /* fetch NOP, LDR in Execute */
697 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, 0, NULL, 0);
698 /* nothing fetched, LDR in EXECUTE stage (2nd cycle) */
699 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, buf_get_u32(armv4_5->core_cache->reg_list[0].value, 0, 32), NULL, 0);
700 /* nothing fetched, LDR in EXECUTE stage (3rd cycle) */
701 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, 0, NULL, 0);
702
703 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, 0, NULL, 0);
704 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, 0, NULL, 0);
705
706 embeddedice_read_reg(dbg_stat);
707
708 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_B(0x7f7), 0, NULL, 1);
709 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, 0, NULL, 0);
710 }
711
712 void arm9tdmi_enable_single_step(struct target *target, uint32_t next_pc)
713 {
714 struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
715
716 if (arm7_9->has_single_step)
717 {
718 buf_set_u32(arm7_9->eice_cache->reg_list[EICE_DBG_CTRL].value, 3, 1, 1);
719 embeddedice_store_reg(&arm7_9->eice_cache->reg_list[EICE_DBG_CTRL]);
720 }
721 else
722 {
723 arm7_9_enable_eice_step(target, next_pc);
724 }
725 }
726
727 void arm9tdmi_disable_single_step(struct target *target)
728 {
729 struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
730
731 if (arm7_9->has_single_step)
732 {
733 buf_set_u32(arm7_9->eice_cache->reg_list[EICE_DBG_CTRL].value, 3, 1, 0);
734 embeddedice_store_reg(&arm7_9->eice_cache->reg_list[EICE_DBG_CTRL]);
735 }
736 else
737 {
738 arm7_9_disable_eice_step(target);
739 }
740 }
741
742 static void arm9tdmi_build_reg_cache(struct target *target)
743 {
744 struct reg_cache **cache_p = register_get_last_cache_p(&target->reg_cache);
745 struct arm *armv4_5 = target_to_arm(target);
746
747 (*cache_p) = arm_build_reg_cache(target, armv4_5);
748 }
749
750 int arm9tdmi_init_target(struct command_context *cmd_ctx,
751 struct target *target)
752 {
753 arm9tdmi_build_reg_cache(target);
754 return ERROR_OK;
755 }
756
757 int arm9tdmi_init_arch_info(struct target *target,
758 struct arm7_9_common *arm7_9, struct jtag_tap *tap)
759 {
760 /* prepare JTAG information for the new target */
761 arm7_9->jtag_info.tap = tap;
762 arm7_9->jtag_info.scann_size = 5;
763
764 /* register arch-specific functions */
765 arm7_9->examine_debug_reason = arm9tdmi_examine_debug_reason;
766 arm7_9->change_to_arm = arm9tdmi_change_to_arm;
767 arm7_9->read_core_regs = arm9tdmi_read_core_regs;
768 arm7_9->read_core_regs_target_buffer = arm9tdmi_read_core_regs_target_buffer;
769 arm7_9->read_xpsr = arm9tdmi_read_xpsr;
770
771 arm7_9->write_xpsr = arm9tdmi_write_xpsr;
772 arm7_9->write_xpsr_im8 = arm9tdmi_write_xpsr_im8;
773 arm7_9->write_core_regs = arm9tdmi_write_core_regs;
774
775 arm7_9->load_word_regs = arm9tdmi_load_word_regs;
776 arm7_9->load_hword_reg = arm9tdmi_load_hword_reg;
777 arm7_9->load_byte_reg = arm9tdmi_load_byte_reg;
778
779 arm7_9->store_word_regs = arm9tdmi_store_word_regs;
780 arm7_9->store_hword_reg = arm9tdmi_store_hword_reg;
781 arm7_9->store_byte_reg = arm9tdmi_store_byte_reg;
782
783 arm7_9->write_pc = arm9tdmi_write_pc;
784 arm7_9->branch_resume = arm9tdmi_branch_resume;
785 arm7_9->branch_resume_thumb = arm9tdmi_branch_resume_thumb;
786
787 arm7_9->enable_single_step = arm9tdmi_enable_single_step;
788 arm7_9->disable_single_step = arm9tdmi_disable_single_step;
789
790 arm7_9->post_debug_entry = NULL;
791
792 arm7_9->pre_restore_context = NULL;
793
794 /* initialize arch-specific breakpoint handling */
795 arm7_9->arm_bkpt = 0xdeeedeee;
796 arm7_9->thumb_bkpt = 0xdeee;
797
798 arm7_9->dbgreq_adjust_pc = 3;
799
800 arm7_9_init_arch_info(target, arm7_9);
801
802 /* override use of DBGRQ, this is safe on ARM9TDMI */
803 arm7_9->use_dbgrq = 1;
804
805 /* all ARM9s have the vector catch register */
806 arm7_9->has_vector_catch = 1;
807
808 return ERROR_OK;
809 }
810
811 static int arm9tdmi_target_create(struct target *target, Jim_Interp *interp)
812 {
813 struct arm7_9_common *arm7_9 = calloc(1,sizeof(struct arm7_9_common));
814
815 arm9tdmi_init_arch_info(target, arm7_9, target->tap);
816 arm7_9->armv4_5_common.is_armv4 = true;
817
818 return ERROR_OK;
819 }
820
821 COMMAND_HANDLER(handle_arm9tdmi_catch_vectors_command)
822 {
823 struct target *target = get_current_target(CMD_CTX);
824 struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
825 struct reg *vector_catch;
826 uint32_t vector_catch_value;
827
828 if (!target_was_examined(target))
829 {
830 LOG_ERROR("Target not examined yet");
831 return ERROR_FAIL;
832 }
833
834 /* it's uncommon, but some ARM7 chips can support this */
835 if (arm7_9->common_magic != ARM7_9_COMMON_MAGIC
836 || !arm7_9->has_vector_catch) {
837 command_print(CMD_CTX, "target doesn't have EmbeddedICE "
838 "with vector_catch");
839 return ERROR_TARGET_INVALID;
840 }
841
842 vector_catch = &arm7_9->eice_cache->reg_list[EICE_VEC_CATCH];
843
844 /* read the vector catch register if necessary */
845 if (!vector_catch->valid)
846 embeddedice_read_reg(vector_catch);
847
848 /* get the current setting */
849 vector_catch_value = buf_get_u32(vector_catch->value, 0, 8);
850
851 if (CMD_ARGC > 0)
852 {
853 vector_catch_value = 0x0;
854 if (strcmp(CMD_ARGV[0], "all") == 0)
855 {
856 vector_catch_value = 0xdf;
857 }
858 else if (strcmp(CMD_ARGV[0], "none") == 0)
859 {
860 /* do nothing */
861 }
862 else
863 {
864 for (unsigned i = 0; i < CMD_ARGC; i++)
865 {
866 /* go through list of vectors */
867 unsigned j;
868 for (j = 0; arm9tdmi_vectors[j].name; j++)
869 {
870 if (strcmp(CMD_ARGV[i], arm9tdmi_vectors[j].name) == 0)
871 {
872 vector_catch_value |= arm9tdmi_vectors[j].value;
873 break;
874 }
875 }
876
877 /* complain if vector wasn't found */
878 if (!arm9tdmi_vectors[j].name)
879 {
880 command_print(CMD_CTX, "vector '%s' not found, leaving current setting unchanged", CMD_ARGV[i]);
881
882 /* reread current setting */
883 vector_catch_value = buf_get_u32(
884 vector_catch->value,
885 0, 8);
886
887 break;
888 }
889 }
890 }
891
892 /* store new settings */
893 buf_set_u32(vector_catch->value, 0, 8, vector_catch_value);
894 embeddedice_store_reg(vector_catch);
895 }
896
897 /* output current settings */
898 for (unsigned i = 0; arm9tdmi_vectors[i].name; i++) {
899 command_print(CMD_CTX, "%s: %s", arm9tdmi_vectors[i].name,
900 (vector_catch_value & arm9tdmi_vectors[i].value)
901 ? "catch" : "don't catch");
902 }
903
904 return ERROR_OK;
905 }
906
907 static const struct command_registration arm9tdmi_exec_command_handlers[] = {
908 {
909 .name = "vector_catch",
910 .handler = handle_arm9tdmi_catch_vectors_command,
911 .mode = COMMAND_EXEC,
912 .help = "Display, after optionally updating, configuration "
913 "of vector catch unit.",
914 .usage = "[all|none|(reset|undef|swi|pabt|dabt|irq|fiq)*]",
915 },
916 COMMAND_REGISTRATION_DONE
917 };
918 const struct command_registration arm9tdmi_command_handlers[] = {
919 {
920 .chain = arm7_9_command_handlers,
921 },
922 {
923 .name = "arm9",
924 .mode = COMMAND_ANY,
925 .help = "arm9 command group",
926 .chain = arm9tdmi_exec_command_handlers,
927 },
928 COMMAND_REGISTRATION_DONE
929 };
930
931 /** Holds methods for ARM9TDMI targets. */
932 struct target_type arm9tdmi_target =
933 {
934 .name = "arm9tdmi",
935
936 .poll = arm7_9_poll,
937 .arch_state = arm_arch_state,
938
939 .target_request_data = arm7_9_target_request_data,
940
941 .halt = arm7_9_halt,
942 .resume = arm7_9_resume,
943 .step = arm7_9_step,
944
945 .assert_reset = arm7_9_assert_reset,
946 .deassert_reset = arm7_9_deassert_reset,
947 .soft_reset_halt = arm7_9_soft_reset_halt,
948
949 .get_gdb_reg_list = arm_get_gdb_reg_list,
950
951 .read_memory = arm7_9_read_memory,
952 .write_memory = arm7_9_write_memory,
953 .bulk_write_memory = arm7_9_bulk_write_memory,
954
955 .checksum_memory = arm_checksum_memory,
956 .blank_check_memory = arm_blank_check_memory,
957
958 .run_algorithm = armv4_5_run_algorithm,
959
960 .add_breakpoint = arm7_9_add_breakpoint,
961 .remove_breakpoint = arm7_9_remove_breakpoint,
962 .add_watchpoint = arm7_9_add_watchpoint,
963 .remove_watchpoint = arm7_9_remove_watchpoint,
964
965 .commands = arm9tdmi_command_handlers,
966 .target_create = arm9tdmi_target_create,
967 .init_target = arm9tdmi_init_target,
968 .examine = arm7_9_examine,
969 .check_reset = arm7_9_check_reset,
970 };