1 /***************************************************************************
2 * Copyright (C) 2005 by Dominic Rath *
3 * Dominic.Rath@gmx.de *
5 * Copyright (C) 2008 by Spencer Oliver *
6 * spen@spen-soft.co.uk *
8 * Copyright (C) 2007,2008 Øyvind Harboe *
9 * oyvind.harboe@zylin.com *
11 * This program is free software; you can redistribute it and/or modify *
12 * it under the terms of the GNU General Public License as published by *
13 * the Free Software Foundation; either version 2 of the License, or *
14 * (at your option) any later version. *
16 * This program is distributed in the hope that it will be useful, *
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
19 * GNU General Public License for more details. *
21 * You should have received a copy of the GNU General Public License *
22 * along with this program; if not, write to the *
23 * Free Software Foundation, Inc., *
24 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
25 ***************************************************************************/
31 #include "target_type.h"
35 * For information about ARM7TDMI, see ARM DDI 0210C (r4p1)
36 * or ARM DDI 0029G (r3). "Debug In Depth", Appendix B,
37 * covers JTAG support.
41 #define _DEBUG_INSTRUCTION_EXECUTION_
44 static int arm7tdmi_examine_debug_reason(target_t *target)
46 int retval = ERROR_OK;
47 /* get pointers to arch-specific information */
48 armv4_5_common_t *armv4_5 = target->arch_info;
49 arm7_9_common_t *arm7_9 = armv4_5->arch_info;
51 /* only check the debug reason if we don't know it already */
52 if ((target->debug_reason != DBG_REASON_DBGRQ)
53 && (target->debug_reason != DBG_REASON_SINGLESTEP))
55 scan_field_t fields[2];
59 jtag_set_end_state(TAP_DRPAUSE);
61 fields[0].tap = arm7_9->jtag_info.tap;
62 fields[0].num_bits = 1;
63 fields[0].out_value = NULL;
64 fields[0].in_value = &breakpoint;
66 fields[1].tap = arm7_9->jtag_info.tap;
67 fields[1].num_bits = 32;
68 fields[1].out_value = NULL;
69 fields[1].in_value = databus;
71 if ((retval = arm_jtag_scann(&arm7_9->jtag_info, 0x1)) != ERROR_OK)
75 arm_jtag_set_instr(&arm7_9->jtag_info, arm7_9->jtag_info.intest_instr, NULL);
77 jtag_add_dr_scan(2, fields, jtag_set_end_state(TAP_DRPAUSE));
78 if ((retval = jtag_execute_queue()) != ERROR_OK)
83 fields[0].in_value = NULL;
84 fields[0].out_value = &breakpoint;
85 fields[1].in_value = NULL;
86 fields[1].out_value = databus;
88 jtag_add_dr_scan(2, fields, jtag_set_end_state(TAP_DRPAUSE));
91 target->debug_reason = DBG_REASON_WATCHPOINT;
93 target->debug_reason = DBG_REASON_BREAKPOINT;
99 static const int arm7tdmi_num_bits[] = {1, 32};
101 static __inline int arm7tdmi_clock_out_inner(arm_jtag_t *jtag_info, uint32_t out, int breakpoint)
103 uint32_t values[2]={breakpoint, flip_u32(out, 32)};
105 jtag_add_dr_out(jtag_info->tap,
109 jtag_get_end_state());
111 jtag_add_runtest(0, jtag_get_end_state());
116 /* put an instruction in the ARM7TDMI pipeline or write the data bus,
117 * and optionally read data
119 * FIXME remove the unused "deprecated" parameter
121 static __inline int arm7tdmi_clock_out(arm_jtag_t *jtag_info,
122 uint32_t out, uint32_t *deprecated, int breakpoint)
124 jtag_set_end_state(TAP_DRPAUSE);
125 arm_jtag_scann(jtag_info, 0x1);
126 arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, NULL);
128 return arm7tdmi_clock_out_inner(jtag_info, out, breakpoint);
131 /* clock the target, reading the databus */
132 static int arm7tdmi_clock_data_in(arm_jtag_t *jtag_info, uint32_t *in)
134 int retval = ERROR_OK;
135 scan_field_t fields[2];
137 jtag_set_end_state(TAP_DRPAUSE);
138 if ((retval = arm_jtag_scann(jtag_info, 0x1)) != ERROR_OK)
142 arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, NULL);
144 fields[0].tap = jtag_info->tap;
145 fields[0].num_bits = 1;
146 fields[0].out_value = NULL;
147 fields[0].in_value = NULL;
149 fields[1].tap = jtag_info->tap;
150 fields[1].num_bits = 32;
151 fields[1].out_value = NULL;
152 fields[1].in_value = (uint8_t *)in;
154 jtag_add_dr_scan(2, fields, jtag_get_end_state());
156 jtag_add_callback(arm7flip32, (jtag_callback_data_t)in);
158 jtag_add_runtest(0, jtag_get_end_state());
160 #ifdef _DEBUG_INSTRUCTION_EXECUTION_
161 if ((retval = jtag_execute_queue()) != ERROR_OK)
165 LOG_DEBUG("in: 0x%8.8x", *in);
167 LOG_ERROR("BUG: called with in == NULL");
173 void arm_endianness(uint8_t *tmp, void *in, int size, int be, int flip)
175 uint32_t readback = le_to_h_u32(tmp);
177 readback = flip_u32(readback, 32);
183 h_u32_to_be(((uint8_t*)in), readback);
186 h_u32_to_le(((uint8_t*)in), readback);
192 h_u16_to_be(((uint8_t*)in), readback & 0xffff);
195 h_u16_to_le(((uint8_t*)in), readback & 0xffff);
199 *((uint8_t *)in)= readback & 0xff;
204 static int arm7endianness(jtag_callback_data_t arg,
205 jtag_callback_data_t size, jtag_callback_data_t be,
206 jtag_callback_data_t captured)
208 uint8_t *in = (uint8_t *)arg;
210 arm_endianness((uint8_t *)captured, in, (int)size, (int)be, 1);
214 /* clock the target, and read the databus
215 * the *in pointer points to a buffer where elements of 'size' bytes
216 * are stored in big (be == 1) or little (be == 0) endianness
218 static int arm7tdmi_clock_data_in_endianness(arm_jtag_t *jtag_info,
219 void *in, int size, int be)
221 int retval = ERROR_OK;
222 scan_field_t fields[2];
224 jtag_set_end_state(TAP_DRPAUSE);
225 if ((retval = arm_jtag_scann(jtag_info, 0x1)) != ERROR_OK)
229 arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, NULL);
231 fields[0].tap = jtag_info->tap;
232 fields[0].num_bits = 1;
233 fields[0].out_value = NULL;
234 fields[0].in_value = NULL;
236 fields[1].tap = jtag_info->tap;
237 fields[1].num_bits = 32;
238 fields[1].out_value = NULL;
239 jtag_alloc_in_value32(&fields[1]);
241 jtag_add_dr_scan(2, fields, jtag_get_end_state());
243 jtag_add_callback4(arm7endianness, (jtag_callback_data_t)in, (jtag_callback_data_t)size, (jtag_callback_data_t)be, (jtag_callback_data_t)fields[1].in_value);
245 jtag_add_runtest(0, jtag_get_end_state());
247 #ifdef _DEBUG_INSTRUCTION_EXECUTION_
249 if ((retval = jtag_execute_queue()) != ERROR_OK)
256 LOG_DEBUG("in: 0x%8.8x", *(uint32_t*)in);
260 LOG_ERROR("BUG: called with in == NULL");
268 static void arm7tdmi_change_to_arm(target_t *target,
269 uint32_t *r0, uint32_t *pc)
271 /* get pointers to arch-specific information */
272 armv4_5_common_t *armv4_5 = target->arch_info;
273 arm7_9_common_t *arm7_9 = armv4_5->arch_info;
274 arm_jtag_t *jtag_info = &arm7_9->jtag_info;
276 /* save r0 before using it and put system in ARM state
277 * to allow common handling of ARM and THUMB debugging */
279 /* fetch STR r0, [r0] */
280 arm7tdmi_clock_out(jtag_info, ARMV4_5_T_STR(0, 0), NULL, 0);
281 arm7tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, NULL, 0);
282 arm7tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, NULL, 0);
283 /* nothing fetched, STR r0, [r0] in Execute (2) */
284 arm7tdmi_clock_data_in(jtag_info, r0);
286 /* MOV r0, r15 fetched, STR in Decode */
287 arm7tdmi_clock_out(jtag_info, ARMV4_5_T_MOV(0, 15), NULL, 0);
288 arm7tdmi_clock_out(jtag_info, ARMV4_5_T_STR(0, 0), NULL, 0);
289 arm7tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, NULL, 0);
290 arm7tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, NULL, 0);
291 /* nothing fetched, STR r0, [r0] in Execute (2) */
292 arm7tdmi_clock_data_in(jtag_info, pc);
294 /* use pc-relative LDR to clear r0[1:0] (for switch to ARM mode) */
295 arm7tdmi_clock_out(jtag_info, ARMV4_5_T_LDR_PCREL(0), NULL, 0);
296 arm7tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, NULL, 0);
297 arm7tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, NULL, 0);
298 /* nothing fetched, data for LDR r0, [PC, #0] */
299 arm7tdmi_clock_out(jtag_info, 0x0, NULL, 0);
300 /* nothing fetched, data from previous cycle is written to register */
301 arm7tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, NULL, 0);
304 arm7tdmi_clock_out(jtag_info, ARMV4_5_T_BX(0), NULL, 0);
305 /* NOP fetched, BX in Decode, MOV in Execute */
306 arm7tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, NULL, 0);
307 /* NOP fetched, BX in Execute (1) */
308 arm7tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, NULL, 0);
310 jtag_execute_queue();
312 /* fix program counter:
313 * MOV r0, r15 was the 4th instruction (+6)
314 * reading PC in Thumb state gives address of instruction + 4
320 /* FIX!!! is this a potential performance bottleneck w.r.t. requiring too many
321 * roundtrips when jtag_execute_queue() has a large overhead(e.g. for USB)s?
323 * The solution is to arrange for a large out/in scan in this loop and
324 * and convert data afterwards.
326 static void arm7tdmi_read_core_regs(target_t *target,
327 uint32_t mask, uint32_t* core_regs[16])
330 /* get pointers to arch-specific information */
331 armv4_5_common_t *armv4_5 = target->arch_info;
332 arm7_9_common_t *arm7_9 = armv4_5->arch_info;
333 arm_jtag_t *jtag_info = &arm7_9->jtag_info;
335 /* STMIA r0-15, [r0] at debug speed
336 * register values will start to appear on 4th DCLK
338 arm7tdmi_clock_out(jtag_info, ARMV4_5_STMIA(0, mask & 0xffff, 0, 0), NULL, 0);
340 /* fetch NOP, STM in DECODE stage */
341 arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
342 /* fetch NOP, STM in EXECUTE stage (1st cycle) */
343 arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
345 for (i = 0; i <= 15; i++)
348 /* nothing fetched, STM still in EXECUTE (1 + i cycle) */
349 arm7tdmi_clock_data_in(jtag_info, core_regs[i]);
353 static void arm7tdmi_read_core_regs_target_buffer(target_t *target,
354 uint32_t mask, void* buffer, int size)
357 /* get pointers to arch-specific information */
358 armv4_5_common_t *armv4_5 = target->arch_info;
359 arm7_9_common_t *arm7_9 = armv4_5->arch_info;
360 arm_jtag_t *jtag_info = &arm7_9->jtag_info;
361 int be = (target->endianness == TARGET_BIG_ENDIAN) ? 1 : 0;
362 uint32_t *buf_u32 = buffer;
363 uint16_t *buf_u16 = buffer;
364 uint8_t *buf_u8 = buffer;
366 /* STMIA r0-15, [r0] at debug speed
367 * register values will start to appear on 4th DCLK
369 arm7tdmi_clock_out(jtag_info, ARMV4_5_STMIA(0, mask & 0xffff, 0, 0), NULL, 0);
371 /* fetch NOP, STM in DECODE stage */
372 arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
373 /* fetch NOP, STM in EXECUTE stage (1st cycle) */
374 arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
376 for (i = 0; i <= 15; i++)
378 /* nothing fetched, STM still in EXECUTE (1 + i cycle), read databus */
384 arm7tdmi_clock_data_in_endianness(jtag_info, buf_u32++, 4, be);
387 arm7tdmi_clock_data_in_endianness(jtag_info, buf_u16++, 2, be);
390 arm7tdmi_clock_data_in_endianness(jtag_info, buf_u8++, 1, be);
397 static void arm7tdmi_read_xpsr(target_t *target, uint32_t *xpsr, int spsr)
399 /* get pointers to arch-specific information */
400 armv4_5_common_t *armv4_5 = target->arch_info;
401 arm7_9_common_t *arm7_9 = armv4_5->arch_info;
402 arm_jtag_t *jtag_info = &arm7_9->jtag_info;
405 arm7tdmi_clock_out(jtag_info, ARMV4_5_MRS(0, spsr & 1), NULL, 0);
408 arm7tdmi_clock_out(jtag_info, ARMV4_5_STR(0, 15), NULL, 0);
409 /* fetch NOP, STR in DECODE stage */
410 arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
411 /* fetch NOP, STR in EXECUTE stage (1st cycle) */
412 arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
413 /* nothing fetched, STR still in EXECUTE (2nd cycle) */
414 arm7tdmi_clock_data_in(jtag_info, xpsr);
417 static void arm7tdmi_write_xpsr(target_t *target, uint32_t xpsr, int spsr)
419 /* get pointers to arch-specific information */
420 armv4_5_common_t *armv4_5 = target->arch_info;
421 arm7_9_common_t *arm7_9 = armv4_5->arch_info;
422 arm_jtag_t *jtag_info = &arm7_9->jtag_info;
424 LOG_DEBUG("xpsr: %8.8" PRIx32 ", spsr: %i", xpsr, spsr);
427 arm7tdmi_clock_out(jtag_info, ARMV4_5_MSR_IM(xpsr & 0xff, 0, 1, spsr), NULL, 0);
428 /* MSR2 fetched, MSR1 in DECODE */
429 arm7tdmi_clock_out(jtag_info, ARMV4_5_MSR_IM((xpsr & 0xff00) >> 8, 0xc, 2, spsr), NULL, 0);
430 /* MSR3 fetched, MSR1 in EXECUTE (1), MSR2 in DECODE */
431 arm7tdmi_clock_out(jtag_info, ARMV4_5_MSR_IM((xpsr & 0xff0000) >> 16, 0x8, 4, spsr), NULL, 0);
432 /* nothing fetched, MSR1 in EXECUTE (2) */
433 arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
434 /* MSR4 fetched, MSR2 in EXECUTE (1), MSR3 in DECODE */
435 arm7tdmi_clock_out(jtag_info, ARMV4_5_MSR_IM((xpsr & 0xff000000) >> 24, 0x4, 8, spsr), NULL, 0);
436 /* nothing fetched, MSR2 in EXECUTE (2) */
437 arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
438 /* NOP fetched, MSR3 in EXECUTE (1), MSR4 in DECODE */
439 arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
440 /* nothing fetched, MSR3 in EXECUTE (2) */
441 arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
442 /* NOP fetched, MSR4 in EXECUTE (1) */
443 arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
444 /* nothing fetched, MSR4 in EXECUTE (2) */
445 arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
448 static void arm7tdmi_write_xpsr_im8(target_t *target,
449 uint8_t xpsr_im, int rot, int spsr)
451 /* get pointers to arch-specific information */
452 armv4_5_common_t *armv4_5 = target->arch_info;
453 arm7_9_common_t *arm7_9 = armv4_5->arch_info;
454 arm_jtag_t *jtag_info = &arm7_9->jtag_info;
456 LOG_DEBUG("xpsr_im: %2.2x, rot: %i, spsr: %i", xpsr_im, rot, spsr);
459 arm7tdmi_clock_out(jtag_info, ARMV4_5_MSR_IM(xpsr_im, rot, 1, spsr), NULL, 0);
460 /* NOP fetched, MSR in DECODE */
461 arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
462 /* NOP fetched, MSR in EXECUTE (1) */
463 arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
464 /* nothing fetched, MSR in EXECUTE (2) */
465 arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
468 static void arm7tdmi_write_core_regs(target_t *target,
469 uint32_t mask, uint32_t core_regs[16])
472 /* get pointers to arch-specific information */
473 armv4_5_common_t *armv4_5 = target->arch_info;
474 arm7_9_common_t *arm7_9 = armv4_5->arch_info;
475 arm_jtag_t *jtag_info = &arm7_9->jtag_info;
477 /* LDMIA r0-15, [r0] at debug speed
478 * register values will start to appear on 4th DCLK
480 arm7tdmi_clock_out(jtag_info, ARMV4_5_LDMIA(0, mask & 0xffff, 0, 0), NULL, 0);
482 /* fetch NOP, LDM in DECODE stage */
483 arm7tdmi_clock_out_inner(jtag_info, ARMV4_5_NOP, 0);
484 /* fetch NOP, LDM in EXECUTE stage (1st cycle) */
485 arm7tdmi_clock_out_inner(jtag_info, ARMV4_5_NOP, 0);
487 for (i = 0; i <= 15; i++)
490 /* nothing fetched, LDM still in EXECUTE (1 + i cycle) */
491 arm7tdmi_clock_out_inner(jtag_info, core_regs[i], 0);
493 arm7tdmi_clock_out_inner(jtag_info, ARMV4_5_NOP, 0);
496 static void arm7tdmi_load_word_regs(target_t *target, uint32_t mask)
498 /* get pointers to arch-specific information */
499 armv4_5_common_t *armv4_5 = target->arch_info;
500 arm7_9_common_t *arm7_9 = armv4_5->arch_info;
501 arm_jtag_t *jtag_info = &arm7_9->jtag_info;
503 /* put system-speed load-multiple into the pipeline */
504 arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
505 arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 1);
506 arm7tdmi_clock_out(jtag_info, ARMV4_5_LDMIA(0, mask & 0xffff, 0, 1), NULL, 0);
509 static void arm7tdmi_load_hword_reg(target_t *target, int num)
511 /* get pointers to arch-specific information */
512 armv4_5_common_t *armv4_5 = target->arch_info;
513 arm7_9_common_t *arm7_9 = armv4_5->arch_info;
514 arm_jtag_t *jtag_info = &arm7_9->jtag_info;
516 /* put system-speed load half-word into the pipeline */
517 arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
518 arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 1);
519 arm7tdmi_clock_out(jtag_info, ARMV4_5_LDRH_IP(num, 0), NULL, 0);
522 static void arm7tdmi_load_byte_reg(target_t *target, int num)
524 /* get pointers to arch-specific information */
525 armv4_5_common_t *armv4_5 = target->arch_info;
526 arm7_9_common_t *arm7_9 = armv4_5->arch_info;
527 arm_jtag_t *jtag_info = &arm7_9->jtag_info;
529 /* put system-speed load byte into the pipeline */
530 arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
531 arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 1);
532 arm7tdmi_clock_out(jtag_info, ARMV4_5_LDRB_IP(num, 0), NULL, 0);
535 static void arm7tdmi_store_word_regs(target_t *target, uint32_t mask)
537 /* get pointers to arch-specific information */
538 armv4_5_common_t *armv4_5 = target->arch_info;
539 arm7_9_common_t *arm7_9 = armv4_5->arch_info;
540 arm_jtag_t *jtag_info = &arm7_9->jtag_info;
542 /* put system-speed store-multiple into the pipeline */
543 arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
544 arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 1);
545 arm7tdmi_clock_out(jtag_info, ARMV4_5_STMIA(0, mask, 0, 1), NULL, 0);
548 static void arm7tdmi_store_hword_reg(target_t *target, int num)
550 /* get pointers to arch-specific information */
551 armv4_5_common_t *armv4_5 = target->arch_info;
552 arm7_9_common_t *arm7_9 = armv4_5->arch_info;
553 arm_jtag_t *jtag_info = &arm7_9->jtag_info;
555 /* put system-speed store half-word into the pipeline */
556 arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
557 arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 1);
558 arm7tdmi_clock_out(jtag_info, ARMV4_5_STRH_IP(num, 0), NULL, 0);
561 static void arm7tdmi_store_byte_reg(target_t *target, int num)
563 /* get pointers to arch-specific information */
564 armv4_5_common_t *armv4_5 = target->arch_info;
565 arm7_9_common_t *arm7_9 = armv4_5->arch_info;
566 arm_jtag_t *jtag_info = &arm7_9->jtag_info;
568 /* put system-speed store byte into the pipeline */
569 arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
570 arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 1);
571 arm7tdmi_clock_out(jtag_info, ARMV4_5_STRB_IP(num, 0), NULL, 0);
574 static void arm7tdmi_write_pc(target_t *target, uint32_t pc)
576 /* get pointers to arch-specific information */
577 armv4_5_common_t *armv4_5 = target->arch_info;
578 arm7_9_common_t *arm7_9 = armv4_5->arch_info;
579 arm_jtag_t *jtag_info = &arm7_9->jtag_info;
581 /* LDMIA r0-15, [r0] at debug speed
582 * register values will start to appear on 4th DCLK
584 arm7tdmi_clock_out(jtag_info, ARMV4_5_LDMIA(0, 0x8000, 0, 0), NULL, 0);
585 /* fetch NOP, LDM in DECODE stage */
586 arm7tdmi_clock_out_inner(jtag_info, ARMV4_5_NOP, 0);
587 /* fetch NOP, LDM in EXECUTE stage (1st cycle) */
588 arm7tdmi_clock_out_inner(jtag_info, ARMV4_5_NOP, 0);
589 /* nothing fetched, LDM in EXECUTE stage (1st cycle) load register */
590 arm7tdmi_clock_out_inner(jtag_info, pc, 0);
591 /* nothing fetched, LDM in EXECUTE stage (2nd cycle) load register */
592 arm7tdmi_clock_out_inner(jtag_info, ARMV4_5_NOP, 0);
593 /* nothing fetched, LDM in EXECUTE stage (3rd cycle) load register */
594 arm7tdmi_clock_out_inner(jtag_info, ARMV4_5_NOP, 0);
595 /* fetch NOP, LDM in EXECUTE stage (4th cycle) */
596 arm7tdmi_clock_out_inner(jtag_info, ARMV4_5_NOP, 0);
597 /* fetch NOP, LDM in EXECUTE stage (5th cycle) */
598 arm7tdmi_clock_out_inner(jtag_info, ARMV4_5_NOP, 0);
601 static void arm7tdmi_branch_resume(target_t *target)
603 /* get pointers to arch-specific information */
604 armv4_5_common_t *armv4_5 = target->arch_info;
605 arm7_9_common_t *arm7_9 = armv4_5->arch_info;
606 arm_jtag_t *jtag_info = &arm7_9->jtag_info;
608 arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 1);
609 arm7tdmi_clock_out_inner(jtag_info, ARMV4_5_B(0xfffffa, 0), 0);
612 static void arm7tdmi_branch_resume_thumb(target_t *target)
616 /* get pointers to arch-specific information */
617 armv4_5_common_t *armv4_5 = target->arch_info;
618 arm7_9_common_t *arm7_9 = armv4_5->arch_info;
619 arm_jtag_t *jtag_info = &arm7_9->jtag_info;
620 reg_t *dbg_stat = &arm7_9->eice_cache->reg_list[EICE_DBG_STAT];
622 /* LDMIA r0, [r0] at debug speed
623 * register values will start to appear on 4th DCLK
625 arm7tdmi_clock_out(jtag_info, ARMV4_5_LDMIA(0, 0x1, 0, 0), NULL, 0);
627 /* fetch NOP, LDM in DECODE stage */
628 arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
629 /* fetch NOP, LDM in EXECUTE stage (1st cycle) */
630 arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
631 /* nothing fetched, LDM in EXECUTE stage (2nd cycle) */
632 arm7tdmi_clock_out(jtag_info, buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32) | 1, NULL, 0);
633 /* nothing fetched, LDM in EXECUTE stage (3rd cycle) */
634 arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
636 /* Branch and eXchange */
637 arm7tdmi_clock_out(jtag_info, ARMV4_5_BX(0), NULL, 0);
639 embeddedice_read_reg(dbg_stat);
641 /* fetch NOP, BX in DECODE stage */
642 arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
644 /* target is now in Thumb state */
645 embeddedice_read_reg(dbg_stat);
647 /* fetch NOP, BX in EXECUTE stage (1st cycle) */
648 arm7tdmi_clock_out(jtag_info, ARMV4_5_NOP, NULL, 0);
650 /* target is now in Thumb state */
651 embeddedice_read_reg(dbg_stat);
654 arm7tdmi_clock_out(jtag_info, ARMV4_5_T_LDR_PCREL(0), NULL, 0);
655 /* fetch NOP, LDR in Decode */
656 arm7tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, NULL, 0);
657 /* fetch NOP, LDR in Execute */
658 arm7tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, NULL, 0);
659 /* nothing fetched, LDR in EXECUTE stage (2nd cycle) */
660 arm7tdmi_clock_out(jtag_info, buf_get_u32(armv4_5->core_cache->reg_list[0].value, 0, 32), NULL, 0);
661 /* nothing fetched, LDR in EXECUTE stage (3rd cycle) */
662 arm7tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, NULL, 0);
664 arm7tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, NULL, 0);
665 arm7tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, NULL, 0);
667 embeddedice_read_reg(dbg_stat);
669 arm7tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, NULL, 1);
670 arm7tdmi_clock_out(jtag_info, ARMV4_5_T_B(0x7f8), NULL, 0);
673 static void arm7tdmi_build_reg_cache(target_t *target)
675 reg_cache_t **cache_p = register_get_last_cache_p(&target->reg_cache);
676 /* get pointers to arch-specific information */
677 armv4_5_common_t *armv4_5 = target->arch_info;
679 (*cache_p) = armv4_5_build_reg_cache(target, armv4_5);
680 armv4_5->core_cache = (*cache_p);
683 int arm7tdmi_examine(struct target_s *target)
686 armv4_5_common_t *armv4_5 = target->arch_info;
687 arm7_9_common_t *arm7_9 = armv4_5->arch_info;
688 if (!target_was_examined(target))
690 /* get pointers to arch-specific information */
691 reg_cache_t **cache_p = register_get_last_cache_p(&target->reg_cache);
692 reg_cache_t *t = embeddedice_build_reg_cache(target, arm7_9);
697 arm7_9->eice_cache = (*cache_p);
701 arm_jtag_t *jtag_info = &arm7_9->jtag_info;
702 (*cache_p)->next = etm_build_reg_cache(target, jtag_info, arm7_9->etm_ctx);
703 arm7_9->etm_ctx->reg_cache = (*cache_p)->next;
705 target_set_examined(target);
707 if ((retval = embeddedice_setup(target)) != ERROR_OK)
709 if ((retval = arm7_9_setup(target)) != ERROR_OK)
713 if ((retval = etm_setup(target)) != ERROR_OK)
719 int arm7tdmi_init_target(struct command_context_s *cmd_ctx, struct target_s *target)
721 arm7tdmi_build_reg_cache(target);
726 int arm7tdmi_init_arch_info(target_t *target, arm7tdmi_common_t *arm7tdmi, jtag_tap_t *tap)
728 armv4_5_common_t *armv4_5;
729 arm7_9_common_t *arm7_9;
731 arm7_9 = &arm7tdmi->arm7_9_common;
732 armv4_5 = &arm7_9->armv4_5_common;
734 /* prepare JTAG information for the new target */
735 arm7_9->jtag_info.tap = tap;
736 arm7_9->jtag_info.scann_size = 4;
738 /* register arch-specific functions */
739 arm7_9->examine_debug_reason = arm7tdmi_examine_debug_reason;
740 arm7_9->change_to_arm = arm7tdmi_change_to_arm;
741 arm7_9->read_core_regs = arm7tdmi_read_core_regs;
742 arm7_9->read_core_regs_target_buffer = arm7tdmi_read_core_regs_target_buffer;
743 arm7_9->read_xpsr = arm7tdmi_read_xpsr;
745 arm7_9->write_xpsr = arm7tdmi_write_xpsr;
746 arm7_9->write_xpsr_im8 = arm7tdmi_write_xpsr_im8;
747 arm7_9->write_core_regs = arm7tdmi_write_core_regs;
749 arm7_9->load_word_regs = arm7tdmi_load_word_regs;
750 arm7_9->load_hword_reg = arm7tdmi_load_hword_reg;
751 arm7_9->load_byte_reg = arm7tdmi_load_byte_reg;
753 arm7_9->store_word_regs = arm7tdmi_store_word_regs;
754 arm7_9->store_hword_reg = arm7tdmi_store_hword_reg;
755 arm7_9->store_byte_reg = arm7tdmi_store_byte_reg;
757 arm7_9->write_pc = arm7tdmi_write_pc;
758 arm7_9->branch_resume = arm7tdmi_branch_resume;
759 arm7_9->branch_resume_thumb = arm7tdmi_branch_resume_thumb;
761 arm7_9->enable_single_step = arm7_9_enable_eice_step;
762 arm7_9->disable_single_step = arm7_9_disable_eice_step;
764 arm7_9->post_debug_entry = NULL;
766 arm7_9->pre_restore_context = NULL;
767 arm7_9->post_restore_context = NULL;
769 /* initialize arch-specific breakpoint handling */
770 arm7_9->arm_bkpt = 0xdeeedeee;
771 arm7_9->thumb_bkpt = 0xdeee;
773 arm7_9->dbgreq_adjust_pc = 2;
774 arm7_9->arch_info = arm7tdmi;
776 arm7tdmi->arch_info = NULL;
777 arm7tdmi->common_magic = ARM7TDMI_COMMON_MAGIC;
779 arm7_9_init_arch_info(target, arm7_9);
784 static int arm7tdmi_target_create(struct target_s *target, Jim_Interp *interp)
786 arm7tdmi_common_t *arm7tdmi;
788 arm7tdmi = calloc(1,sizeof(arm7tdmi_common_t));
789 arm7tdmi_init_arch_info(target, arm7tdmi, target->tap);
790 arm7tdmi->arm7_9_common.armv4_5_common.is_armv4 = true;
795 /** Holds methods for ARM7TDMI targets. */
796 target_type_t arm7tdmi_target =
801 .arch_state = armv4_5_arch_state,
803 .target_request_data = arm7_9_target_request_data,
806 .resume = arm7_9_resume,
809 .assert_reset = arm7_9_assert_reset,
810 .deassert_reset = arm7_9_deassert_reset,
811 .soft_reset_halt = arm7_9_soft_reset_halt,
813 .get_gdb_reg_list = armv4_5_get_gdb_reg_list,
815 .read_memory = arm7_9_read_memory,
816 .write_memory = arm7_9_write_memory,
817 .bulk_write_memory = arm7_9_bulk_write_memory,
818 .checksum_memory = arm7_9_checksum_memory,
819 .blank_check_memory = arm7_9_blank_check_memory,
821 .run_algorithm = armv4_5_run_algorithm,
823 .add_breakpoint = arm7_9_add_breakpoint,
824 .remove_breakpoint = arm7_9_remove_breakpoint,
825 .add_watchpoint = arm7_9_add_watchpoint,
826 .remove_watchpoint = arm7_9_remove_watchpoint,
828 .register_commands = arm7_9_register_commands,
829 .target_create = arm7tdmi_target_create,
830 .init_target = arm7tdmi_init_target,
831 .examine = arm7tdmi_examine,