1 /***************************************************************************
2 * Copyright (C) 2005 by Dominic Rath *
3 * Dominic.Rath@gmx.de *
5 * This program is free software; you can redistribute it and/or modify *
6 * it under the terms of the GNU General Public License as published by *
7 * the Free Software Foundation; either version 2 of the License, or *
8 * (at your option) any later version. *
10 * This program is distributed in the hope that it will be useful, *
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
13 * GNU General Public License for more details. *
15 * You should have received a copy of the GNU General Public License *
16 * along with this program; if not, write to the *
17 * Free Software Foundation, Inc., *
18 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
19 ***************************************************************************/
26 #include "arm7_9_common.h"
30 #include "embeddedice.h"
41 #define _DEBUG_INSTRUCTION_EXECUTION_
45 int arm9tdmi_register_commands(struct command_context_s *cmd_ctx);
46 int handle_arm9tdmi_catch_vectors_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
48 /* forward declarations */
49 int arm9tdmi_target_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc, struct target_s *target);
50 int arm9tdmi_init_target(struct command_context_s *cmd_ctx, struct target_s *target);
53 target_type_t arm9tdmi_target =
58 .arch_state = armv4_5_arch_state,
61 .resume = arm7_9_resume,
64 .assert_reset = arm7_9_assert_reset,
65 .deassert_reset = arm7_9_deassert_reset,
66 .soft_reset_halt = arm7_9_soft_reset_halt,
67 .prepare_reset_halt = arm7_9_prepare_reset_halt,
69 .get_gdb_reg_list = armv4_5_get_gdb_reg_list,
71 .read_memory = arm7_9_read_memory,
72 .write_memory = arm7_9_write_memory,
73 .bulk_write_memory = arm7_9_bulk_write_memory,
75 .run_algorithm = armv4_5_run_algorithm,
77 .add_breakpoint = arm7_9_add_breakpoint,
78 .remove_breakpoint = arm7_9_remove_breakpoint,
79 .add_watchpoint = arm7_9_add_watchpoint,
80 .remove_watchpoint = arm7_9_remove_watchpoint,
82 .register_commands = arm9tdmi_register_commands,
83 .target_command = arm9tdmi_target_command,
84 .init_target = arm9tdmi_init_target,
88 arm9tdmi_vector_t arm9tdmi_vectors[] =
90 {"reset", ARM9TDMI_RESET_VECTOR},
91 {"undef", ARM9TDMI_UNDEF_VECTOR},
92 {"swi", ARM9TDMI_SWI_VECTOR},
93 {"pabt", ARM9TDMI_PABT_VECTOR},
94 {"dabt", ARM9TDMI_DABT_VECTOR},
95 {"reserved", ARM9TDMI_RESERVED_VECTOR},
96 {"irq", ARM9TDMI_IRQ_VECTOR},
97 {"fiq", ARM9TDMI_FIQ_VECTOR},
101 int arm9tdmi_jtag_error_handler(u8 *in_value, void *priv)
105 DEBUG("caller: %s", caller);
110 int arm9tdmi_examine_debug_reason(target_t *target)
112 /* get pointers to arch-specific information */
113 armv4_5_common_t *armv4_5 = target->arch_info;
114 arm7_9_common_t *arm7_9 = armv4_5->arch_info;
116 /* only check the debug reason if we don't know it already */
117 if ((target->debug_reason != DBG_REASON_DBGRQ)
118 && (target->debug_reason != DBG_REASON_SINGLESTEP))
120 error_handler_t error_handler;
121 scan_field_t fields[3];
123 u8 instructionbus[4];
126 jtag_add_end_state(TAP_PD);
128 fields[0].device = arm7_9->jtag_info.chain_pos;
129 fields[0].num_bits = 32;
130 fields[0].out_value = NULL;
131 fields[0].out_mask = NULL;
132 fields[0].in_value = databus;
133 fields[0].in_check_value = NULL;
134 fields[0].in_check_mask = NULL;
135 fields[0].in_handler = NULL;
136 fields[0].in_handler_priv = NULL;
138 fields[1].device = arm7_9->jtag_info.chain_pos;
139 fields[1].num_bits = 3;
140 fields[1].out_value = NULL;
141 fields[1].out_mask = NULL;
142 fields[1].in_value = &debug_reason;
143 fields[1].in_check_value = NULL;
144 fields[1].in_check_mask = NULL;
145 fields[1].in_handler = NULL;
146 fields[1].in_handler_priv = NULL;
148 fields[2].device = arm7_9->jtag_info.chain_pos;
149 fields[2].num_bits = 32;
150 fields[2].out_value = NULL;
151 fields[2].out_mask = NULL;
152 fields[2].in_value = instructionbus;
153 fields[2].in_check_value = NULL;
154 fields[2].in_check_mask = NULL;
155 fields[2].in_handler = NULL;
156 fields[2].in_handler_priv = NULL;
158 arm_jtag_scann(&arm7_9->jtag_info, 0x1);
159 error_handler.error_handler = arm9tdmi_jtag_error_handler;
160 error_handler.error_handler_priv = "arm9tdmi_examine_debug_reason";
161 arm_jtag_set_instr(&arm7_9->jtag_info, arm7_9->jtag_info.intest_instr, &error_handler);
163 jtag_add_dr_scan(3, fields, TAP_PD, NULL);
164 jtag_execute_queue();
166 fields[0].in_value = NULL;
167 fields[0].out_value = databus;
168 fields[1].in_value = NULL;
169 fields[1].out_value = &debug_reason;
170 fields[2].in_value = NULL;
171 fields[2].out_value = instructionbus;
173 jtag_add_dr_scan(3, fields, TAP_PD, NULL);
175 if (debug_reason & 0x4)
176 if (debug_reason & 0x2)
177 target->debug_reason = DBG_REASON_WPTANDBKPT;
179 target->debug_reason = DBG_REASON_WATCHPOINT;
181 target->debug_reason = DBG_REASON_BREAKPOINT;
187 /* put an instruction in the ARM9TDMI pipeline or write the data bus, and optionally read data */
188 int arm9tdmi_clock_out(arm_jtag_t *jtag_info, u32 instr, u32 out, u32 *in, int sysspeed)
190 error_handler_t error_handler;
191 scan_field_t fields[3];
194 u8 sysspeed_buf = 0x0;
197 buf_set_u32(out_buf, 0, 32, out);
199 buf_set_u32(instr_buf, 0, 32, flip_u32(instr, 32));
202 buf_set_u32(&sysspeed_buf, 2, 1, 1);
204 jtag_add_end_state(TAP_PD);
205 arm_jtag_scann(jtag_info, 0x1);
207 error_handler.error_handler = arm9tdmi_jtag_error_handler;
208 error_handler.error_handler_priv = "arm9tdmi_clock_out";
210 arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, &error_handler);
212 fields[0].device = jtag_info->chain_pos;
213 fields[0].num_bits = 32;
214 fields[0].out_value = out_buf;
215 fields[0].out_mask = NULL;
216 fields[0].in_value = NULL;
219 fields[0].in_handler = arm_jtag_buf_to_u32;
220 fields[0].in_handler_priv = in;
224 fields[0].in_handler = NULL;
225 fields[0].in_handler_priv = NULL;
227 fields[0].in_check_value = NULL;
228 fields[0].in_check_mask = NULL;
230 fields[1].device = jtag_info->chain_pos;
231 fields[1].num_bits = 3;
232 fields[1].out_value = &sysspeed_buf;
233 fields[1].out_mask = NULL;
234 fields[1].in_value = NULL;
235 fields[1].in_check_value = NULL;
236 fields[1].in_check_mask = NULL;
237 fields[1].in_handler = NULL;
238 fields[1].in_handler_priv = NULL;
240 fields[2].device = jtag_info->chain_pos;
241 fields[2].num_bits = 32;
242 fields[2].out_value = instr_buf;
243 fields[2].out_mask = NULL;
244 fields[2].in_value = NULL;
245 fields[2].in_check_value = NULL;
246 fields[2].in_check_mask = NULL;
247 fields[2].in_handler = NULL;
248 fields[2].in_handler_priv = NULL;
250 jtag_add_dr_scan(3, fields, -1, NULL);
252 jtag_add_runtest(0, -1);
254 #ifdef _DEBUG_INSTRUCTION_EXECUTION_
256 jtag_execute_queue();
260 DEBUG("instr: 0x%8.8x, out: 0x%8.8x, in: 0x%8.8x", instr, out, *in);
263 DEBUG("instr: 0x%8.8x, out: 0x%8.8x", instr, out);
270 /* just read data (instruction and data-out = don't care) */
271 int arm9tdmi_clock_data_in(arm_jtag_t *jtag_info, u32 *in)
273 scan_field_t fields[3];
274 error_handler_t error_handler;
276 jtag_add_end_state(TAP_PD);
277 arm_jtag_scann(jtag_info, 0x1);
279 error_handler.error_handler = arm9tdmi_jtag_error_handler;
280 error_handler.error_handler_priv = "arm9tdmi_clock_data_in_endianness";
282 arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, &error_handler);
284 fields[0].device = jtag_info->chain_pos;
285 fields[0].num_bits = 32;
286 fields[0].out_value = NULL;
287 fields[0].out_mask = NULL;
288 fields[0].in_value = NULL;
289 fields[0].in_handler = arm_jtag_buf_to_u32;
290 fields[0].in_handler_priv = in;
291 fields[0].in_check_value = NULL;
292 fields[0].in_check_mask = NULL;
294 fields[1].device = jtag_info->chain_pos;
295 fields[1].num_bits = 3;
296 fields[1].out_value = NULL;
297 fields[1].out_mask = NULL;
298 fields[1].in_value = NULL;
299 fields[1].in_handler = NULL;
300 fields[1].in_handler_priv = NULL;
301 fields[1].in_check_value = NULL;
302 fields[1].in_check_mask = NULL;
304 fields[2].device = jtag_info->chain_pos;
305 fields[2].num_bits = 32;
306 fields[2].out_value = NULL;
307 fields[2].out_mask = NULL;
308 fields[2].in_value = NULL;
309 fields[2].in_check_value = NULL;
310 fields[2].in_check_mask = NULL;
311 fields[2].in_handler = NULL;
312 fields[2].in_handler_priv = NULL;
314 jtag_add_dr_scan(3, fields, -1, NULL);
316 jtag_add_runtest(0, -1);
318 #ifdef _DEBUG_INSTRUCTION_EXECUTION_
320 jtag_execute_queue();
324 DEBUG("in: 0x%8.8x", *in);
328 ERROR("BUG: called with in == NULL");
336 /* clock the target, and read the databus
337 * the *in pointer points to a buffer where elements of 'size' bytes
338 * are stored in big (be==1) or little (be==0) endianness
340 int arm9tdmi_clock_data_in_endianness(arm_jtag_t *jtag_info, void *in, int size, int be)
342 scan_field_t fields[3];
343 error_handler_t error_handler;
345 jtag_add_end_state(TAP_PD);
346 arm_jtag_scann(jtag_info, 0x1);
348 error_handler.error_handler = arm9tdmi_jtag_error_handler;
349 error_handler.error_handler_priv = "arm9tdmi_clock_data_in_endianness";
351 arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, &error_handler);
353 fields[0].device = jtag_info->chain_pos;
354 fields[0].num_bits = 32;
355 fields[0].out_value = NULL;
356 fields[0].out_mask = NULL;
357 fields[0].in_value = NULL;
361 fields[0].in_handler = (be) ? arm_jtag_buf_to_be32 : arm_jtag_buf_to_le32;
364 fields[0].in_handler = (be) ? arm_jtag_buf_to_be16 : arm_jtag_buf_to_le16;
367 fields[0].in_handler = arm_jtag_buf_to_8;
370 fields[0].in_handler_priv = in;
371 fields[0].in_check_value = NULL;
372 fields[0].in_check_mask = NULL;
374 fields[1].device = jtag_info->chain_pos;
375 fields[1].num_bits = 3;
376 fields[1].out_value = NULL;
377 fields[1].out_mask = NULL;
378 fields[1].in_value = NULL;
379 fields[1].in_handler = NULL;
380 fields[1].in_handler_priv = NULL;
381 fields[1].in_check_value = NULL;
382 fields[1].in_check_mask = NULL;
384 fields[2].device = jtag_info->chain_pos;
385 fields[2].num_bits = 32;
386 fields[2].out_value = NULL;
387 fields[2].out_mask = NULL;
388 fields[2].in_value = NULL;
389 fields[2].in_check_value = NULL;
390 fields[2].in_check_mask = NULL;
391 fields[2].in_handler = NULL;
392 fields[2].in_handler_priv = NULL;
394 jtag_add_dr_scan(3, fields, -1, NULL);
396 jtag_add_runtest(0, -1);
398 #ifdef _DEBUG_INSTRUCTION_EXECUTION_
400 jtag_execute_queue();
404 DEBUG("in: 0x%8.8x", *in);
408 ERROR("BUG: called with in == NULL");
416 void arm9tdmi_change_to_arm(target_t *target, u32 *r0, u32 *pc)
418 /* get pointers to arch-specific information */
419 armv4_5_common_t *armv4_5 = target->arch_info;
420 arm7_9_common_t *arm7_9 = armv4_5->arch_info;
421 arm_jtag_t *jtag_info = &arm7_9->jtag_info;
423 /* save r0 before using it and put system in ARM state
424 * to allow common handling of ARM and THUMB debugging */
426 /* fetch STR r0, [r0] */
427 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_STR(0, 0), 0, NULL, 0);
428 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, 0, NULL, 0);
429 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, 0, NULL, 0);
430 /* STR r0, [r0] in Memory */
431 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, 0, r0, 0);
433 /* MOV r0, r15 fetched, STR in Decode */
434 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_MOV(0, 15), 0, NULL, 0);
435 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, 0, NULL, 0);
436 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_STR(0, 0), 0, NULL, 0);
437 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, 0, NULL, 0);
438 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, 0, NULL, 0);
439 /* nothing fetched, STR r0, [r0] in Memory */
440 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, 0, pc, 0);
442 /* use pc-relative LDR to clear r0[1:0] (for switch to ARM mode) */
443 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_LDR_PCREL(0), 0, NULL, 0);
445 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, 0, NULL, 0);
447 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, 0, NULL, 0);
448 /* LDR in Memory (to account for interlock) */
449 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, 0, NULL, 0);
452 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_BX(0), 0, NULL, 0);
453 /* NOP fetched, BX in Decode, MOV in Execute */
454 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, 0, NULL, 0);
455 /* NOP fetched, BX in Execute (1) */
456 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, 0, NULL, 0);
458 jtag_execute_queue();
460 /* fix program counter:
461 * MOV r0, r15 was the 5th instruction (+8)
462 * reading PC in Thumb state gives address of instruction + 4
467 void arm9tdmi_read_core_regs(target_t *target, u32 mask, u32* core_regs[16])
470 /* get pointers to arch-specific information */
471 armv4_5_common_t *armv4_5 = target->arch_info;
472 arm7_9_common_t *arm7_9 = armv4_5->arch_info;
473 arm_jtag_t *jtag_info = &arm7_9->jtag_info;
475 /* STMIA r0-15, [r0] at debug speed
476 * register values will start to appear on 4th DCLK
478 arm9tdmi_clock_out(jtag_info, ARMV4_5_STMIA(0, mask & 0xffff, 0, 0), 0, NULL, 0);
480 /* fetch NOP, STM in DECODE stage */
481 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
482 /* fetch NOP, STM in EXECUTE stage (1st cycle) */
483 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
485 for (i = 0; i <= 15; i++)
488 /* nothing fetched, STM in MEMORY (i'th cycle) */
489 arm9tdmi_clock_data_in(jtag_info, core_regs[i]);
494 void arm9tdmi_read_core_regs_target_buffer(target_t *target, u32 mask, void* buffer, int size)
497 /* get pointers to arch-specific information */
498 armv4_5_common_t *armv4_5 = target->arch_info;
499 arm7_9_common_t *arm7_9 = armv4_5->arch_info;
500 arm_jtag_t *jtag_info = &arm7_9->jtag_info;
501 int be = (target->endianness == TARGET_BIG_ENDIAN) ? 1 : 0;
502 u32 *buf_u32 = buffer;
503 u16 *buf_u16 = buffer;
506 /* STMIA r0-15, [r0] at debug speed
507 * register values will start to appear on 4th DCLK
509 arm9tdmi_clock_out(jtag_info, ARMV4_5_STMIA(0, mask & 0xffff, 0, 0), 0, NULL, 0);
511 /* fetch NOP, STM in DECODE stage */
512 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
513 /* fetch NOP, STM in EXECUTE stage (1st cycle) */
514 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
516 for (i = 0; i <= 15; i++)
519 /* nothing fetched, STM in MEMORY (i'th cycle) */
523 arm9tdmi_clock_data_in_endianness(jtag_info, buf_u32++, 4, be);
526 arm9tdmi_clock_data_in_endianness(jtag_info, buf_u16++, 2, be);
529 arm9tdmi_clock_data_in_endianness(jtag_info, buf_u8++, 1, be);
536 void arm9tdmi_read_xpsr(target_t *target, u32 *xpsr, int spsr)
538 /* get pointers to arch-specific information */
539 armv4_5_common_t *armv4_5 = target->arch_info;
540 arm7_9_common_t *arm7_9 = armv4_5->arch_info;
541 arm_jtag_t *jtag_info = &arm7_9->jtag_info;
544 arm9tdmi_clock_out(jtag_info, ARMV4_5_MRS(0, spsr & 1), 0, NULL, 0);
545 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
546 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
547 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
548 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
551 arm9tdmi_clock_out(jtag_info, ARMV4_5_STR(0, 15), 0, NULL, 0);
552 /* fetch NOP, STR in DECODE stage */
553 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
554 /* fetch NOP, STR in EXECUTE stage (1st cycle) */
555 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
556 /* nothing fetched, STR in MEMORY */
557 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, xpsr, 0);
561 void arm9tdmi_write_xpsr(target_t *target, u32 xpsr, int spsr)
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 DEBUG("xpsr: %8.8x, spsr: %i", xpsr, spsr);
571 arm9tdmi_clock_out(jtag_info, ARMV4_5_MSR_IM(xpsr & 0xff, 0, 1, spsr), 0, NULL, 0);
572 /* MSR2 fetched, MSR1 in DECODE */
573 arm9tdmi_clock_out(jtag_info, ARMV4_5_MSR_IM((xpsr & 0xff00) >> 8, 0xc, 2, spsr), 0, NULL, 0);
574 /* MSR3 fetched, MSR1 in EXECUTE (1), MSR2 in DECODE */
575 arm9tdmi_clock_out(jtag_info, ARMV4_5_MSR_IM((xpsr & 0xff0000) >> 16, 0x8, 4, spsr), 0, NULL, 0);
576 /* nothing fetched, MSR1 in EXECUTE (2) */
577 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
578 /* nothing fetched, MSR1 in EXECUTE (3) */
579 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
580 /* MSR4 fetched, MSR2 in EXECUTE (1), MSR3 in DECODE */
581 arm9tdmi_clock_out(jtag_info, ARMV4_5_MSR_IM((xpsr & 0xff000000) >> 24, 0x4, 8, spsr), 0, NULL, 0);
582 /* nothing fetched, MSR2 in EXECUTE (2) */
583 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
584 /* nothing fetched, MSR2 in EXECUTE (3) */
585 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
586 /* NOP fetched, MSR3 in EXECUTE (1), MSR4 in DECODE */
587 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
588 /* nothing fetched, MSR3 in EXECUTE (2) */
589 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
590 /* nothing fetched, MSR3 in EXECUTE (3) */
591 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
592 /* NOP fetched, MSR4 in EXECUTE (1) */
593 /* last MSR writes flags, which takes only one cycle */
594 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
597 void arm9tdmi_write_xpsr_im8(target_t *target, u8 xpsr_im, int rot, int spsr)
599 /* get pointers to arch-specific information */
600 armv4_5_common_t *armv4_5 = target->arch_info;
601 arm7_9_common_t *arm7_9 = armv4_5->arch_info;
602 arm_jtag_t *jtag_info = &arm7_9->jtag_info;
604 DEBUG("xpsr_im: %2.2x, rot: %i, spsr: %i", xpsr_im, rot, spsr);
607 arm9tdmi_clock_out(jtag_info, ARMV4_5_MSR_IM(xpsr_im, rot, 1, spsr), 0, NULL, 0);
608 /* NOP fetched, MSR in DECODE */
609 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
610 /* NOP fetched, MSR in EXECUTE (1) */
611 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
613 /* rot == 4 writes flags, which takes only one cycle */
616 /* nothing fetched, MSR in EXECUTE (2) */
617 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
618 /* nothing fetched, MSR in EXECUTE (3) */
619 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
623 void arm9tdmi_write_core_regs(target_t *target, u32 mask, u32 core_regs[16])
626 /* get pointers to arch-specific information */
627 armv4_5_common_t *armv4_5 = target->arch_info;
628 arm7_9_common_t *arm7_9 = armv4_5->arch_info;
629 arm_jtag_t *jtag_info = &arm7_9->jtag_info;
631 /* LDMIA r0-15, [r0] at debug speed
632 * register values will start to appear on 4th DCLK
634 arm9tdmi_clock_out(jtag_info, ARMV4_5_LDMIA(0, mask & 0xffff, 0, 0), 0, NULL, 0);
636 /* fetch NOP, LDM in DECODE stage */
637 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
638 /* fetch NOP, LDM in EXECUTE stage (1st cycle) */
639 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
641 for (i = 0; i <= 15; i++)
644 /* nothing fetched, LDM still in EXECUTE (1+i cycle) */
645 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, core_regs[i], NULL, 0);
647 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
651 void arm9tdmi_load_word_regs(target_t *target, u32 mask)
653 /* get pointers to arch-specific information */
654 armv4_5_common_t *armv4_5 = target->arch_info;
655 arm7_9_common_t *arm7_9 = armv4_5->arch_info;
656 arm_jtag_t *jtag_info = &arm7_9->jtag_info;
658 /* put system-speed load-multiple into the pipeline */
659 arm9tdmi_clock_out(jtag_info, ARMV4_5_LDMIA(0, mask & 0xffff, 0, 1), 0, NULL, 0);
660 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 1);
664 void arm9tdmi_load_hword_reg(target_t *target, int num)
666 /* get pointers to arch-specific information */
667 armv4_5_common_t *armv4_5 = target->arch_info;
668 arm7_9_common_t *arm7_9 = armv4_5->arch_info;
669 arm_jtag_t *jtag_info = &arm7_9->jtag_info;
671 /* put system-speed load half-word into the pipeline */
672 arm9tdmi_clock_out(jtag_info, ARMV4_5_LDRH_IP(num, 0), 0, NULL, 0);
673 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 1);
676 void arm9tdmi_load_byte_reg(target_t *target, int num)
678 /* get pointers to arch-specific information */
679 armv4_5_common_t *armv4_5 = target->arch_info;
680 arm7_9_common_t *arm7_9 = armv4_5->arch_info;
681 arm_jtag_t *jtag_info = &arm7_9->jtag_info;
683 /* put system-speed load byte into the pipeline */
684 arm9tdmi_clock_out(jtag_info, ARMV4_5_LDRB_IP(num, 0), 0, NULL, 0);
685 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 1);
689 void arm9tdmi_store_word_regs(target_t *target, u32 mask)
691 /* get pointers to arch-specific information */
692 armv4_5_common_t *armv4_5 = target->arch_info;
693 arm7_9_common_t *arm7_9 = armv4_5->arch_info;
694 arm_jtag_t *jtag_info = &arm7_9->jtag_info;
696 /* put system-speed store-multiple into the pipeline */
697 arm9tdmi_clock_out(jtag_info, ARMV4_5_STMIA(0, mask, 0, 1), 0, NULL, 0);
698 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 1);
702 void arm9tdmi_store_hword_reg(target_t *target, int num)
704 /* get pointers to arch-specific information */
705 armv4_5_common_t *armv4_5 = target->arch_info;
706 arm7_9_common_t *arm7_9 = armv4_5->arch_info;
707 arm_jtag_t *jtag_info = &arm7_9->jtag_info;
709 /* put system-speed store half-word into the pipeline */
710 arm9tdmi_clock_out(jtag_info, ARMV4_5_STRH_IP(num, 0), 0, NULL, 0);
711 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 1);
715 void arm9tdmi_store_byte_reg(target_t *target, int num)
717 /* get pointers to arch-specific information */
718 armv4_5_common_t *armv4_5 = target->arch_info;
719 arm7_9_common_t *arm7_9 = armv4_5->arch_info;
720 arm_jtag_t *jtag_info = &arm7_9->jtag_info;
722 /* put system-speed store byte into the pipeline */
723 arm9tdmi_clock_out(jtag_info, ARMV4_5_STRB_IP(num, 0), 0, NULL, 0);
724 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 1);
728 void arm9tdmi_write_pc(target_t *target, u32 pc)
730 /* get pointers to arch-specific information */
731 armv4_5_common_t *armv4_5 = target->arch_info;
732 arm7_9_common_t *arm7_9 = armv4_5->arch_info;
733 arm_jtag_t *jtag_info = &arm7_9->jtag_info;
735 /* LDMIA r0-15, [r0] at debug speed
736 * register values will start to appear on 4th DCLK
738 arm9tdmi_clock_out(jtag_info, ARMV4_5_LDMIA(0, 0x8000, 0, 0), 0, NULL, 0);
740 /* fetch NOP, LDM in DECODE stage */
741 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
742 /* fetch NOP, LDM in EXECUTE stage (1st cycle) */
743 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
744 /* nothing fetched, LDM in EXECUTE stage (2nd cycle) (output data) */
745 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, pc, NULL, 0);
746 /* nothing fetched, LDM in EXECUTE stage (3rd cycle) */
747 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
748 /* fetch NOP, LDM in EXECUTE stage (4th cycle) */
749 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
750 /* fetch NOP, LDM in EXECUTE stage (5th cycle) */
751 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
755 void arm9tdmi_branch_resume(target_t *target)
757 /* get pointers to arch-specific information */
758 armv4_5_common_t *armv4_5 = target->arch_info;
759 arm7_9_common_t *arm7_9 = armv4_5->arch_info;
760 arm_jtag_t *jtag_info = &arm7_9->jtag_info;
762 arm9tdmi_clock_out(jtag_info, ARMV4_5_B(0xfffffc, 0), 0, NULL, 0);
763 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 1);
767 void arm9tdmi_branch_resume_thumb(target_t *target)
771 /* get pointers to arch-specific information */
772 armv4_5_common_t *armv4_5 = target->arch_info;
773 arm7_9_common_t *arm7_9 = armv4_5->arch_info;
774 arm_jtag_t *jtag_info = &arm7_9->jtag_info;
775 reg_t *dbg_stat = &arm7_9->eice_cache->reg_list[EICE_DBG_STAT];
777 /* LDMIA r0-15, [r0] at debug speed
778 * register values will start to appear on 4th DCLK
780 arm9tdmi_clock_out(jtag_info, ARMV4_5_LDMIA(0, 0x1, 0, 0), 0, NULL, 0);
782 /* fetch NOP, LDM in DECODE stage */
783 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
784 /* fetch NOP, LDM in EXECUTE stage (1st cycle) */
785 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
786 /* nothing fetched, LDM in EXECUTE stage (2nd cycle) */
787 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32) | 1, NULL, 0);
788 /* nothing fetched, LDM in EXECUTE stage (3rd cycle) */
789 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
791 /* Branch and eXchange */
792 arm9tdmi_clock_out(jtag_info, ARMV4_5_BX(0), 0, NULL, 0);
794 embeddedice_read_reg(dbg_stat);
796 /* fetch NOP, BX in DECODE stage */
797 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
799 embeddedice_read_reg(dbg_stat);
801 /* fetch NOP, BX in EXECUTE stage (1st cycle) */
802 arm9tdmi_clock_out(jtag_info, ARMV4_5_NOP, 0, NULL, 0);
804 /* target is now in Thumb state */
805 embeddedice_read_reg(dbg_stat);
807 /* load r0 value, MOV_IM in Decode*/
808 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_LDR_PCREL(0), 0, NULL, 0);
809 /* fetch NOP, LDR in Decode, MOV_IM in Execute */
810 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, 0, NULL, 0);
811 /* fetch NOP, LDR in Execute */
812 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, 0, NULL, 0);
813 /* nothing fetched, LDR in EXECUTE stage (2nd cycle) */
814 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, buf_get_u32(armv4_5->core_cache->reg_list[0].value, 0, 32), NULL, 0);
815 /* nothing fetched, LDR in EXECUTE stage (3rd cycle) */
816 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, 0, NULL, 0);
818 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, 0, NULL, 0);
819 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, 0, NULL, 0);
821 embeddedice_read_reg(dbg_stat);
823 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_B(0x7f7), 0, NULL, 1);
824 arm9tdmi_clock_out(jtag_info, ARMV4_5_T_NOP, 0, NULL, 0);
828 void arm9tdmi_enable_single_step(target_t *target)
830 /* get pointers to arch-specific information */
831 armv4_5_common_t *armv4_5 = target->arch_info;
832 arm7_9_common_t *arm7_9 = armv4_5->arch_info;
834 if (arm7_9->has_single_step)
836 buf_set_u32(arm7_9->eice_cache->reg_list[EICE_DBG_CTRL].value, 3, 1, 1);
837 embeddedice_store_reg(&arm7_9->eice_cache->reg_list[EICE_DBG_CTRL]);
841 arm7_9_enable_eice_step(target);
845 void arm9tdmi_disable_single_step(target_t *target)
847 /* get pointers to arch-specific information */
848 armv4_5_common_t *armv4_5 = target->arch_info;
849 arm7_9_common_t *arm7_9 = armv4_5->arch_info;
851 if (arm7_9->has_single_step)
853 buf_set_u32(arm7_9->eice_cache->reg_list[EICE_DBG_CTRL].value, 3, 1, 0);
854 embeddedice_store_reg(&arm7_9->eice_cache->reg_list[EICE_DBG_CTRL]);
858 arm7_9_disable_eice_step(target);
862 void arm9tdmi_build_reg_cache(target_t *target)
864 reg_cache_t **cache_p = register_get_last_cache_p(&target->reg_cache);
865 /* get pointers to arch-specific information */
866 armv4_5_common_t *armv4_5 = target->arch_info;
867 arm7_9_common_t *arm7_9 = armv4_5->arch_info;
868 arm_jtag_t *jtag_info = &arm7_9->jtag_info;
870 (*cache_p) = armv4_5_build_reg_cache(target, armv4_5);
871 armv4_5->core_cache = (*cache_p);
873 /* one extra register (vector catch) */
874 (*cache_p)->next = embeddedice_build_reg_cache(target, arm7_9);
875 arm7_9->eice_cache = (*cache_p)->next;
879 (*cache_p)->next->next = etm_build_reg_cache(target, jtag_info, arm7_9->etm_ctx);
880 arm7_9->etm_ctx->reg_cache = (*cache_p)->next->next;
884 int arm9tdmi_init_target(struct command_context_s *cmd_ctx, struct target_s *target)
887 arm9tdmi_build_reg_cache(target);
899 int arm9tdmi_init_arch_info(target_t *target, arm9tdmi_common_t *arm9tdmi, int chain_pos, char *variant)
901 armv4_5_common_t *armv4_5;
902 arm7_9_common_t *arm7_9;
904 arm7_9 = &arm9tdmi->arm7_9_common;
905 armv4_5 = &arm7_9->armv4_5_common;
907 /* prepare JTAG information for the new target */
908 arm7_9->jtag_info.chain_pos = chain_pos;
909 arm7_9->jtag_info.scann_size = 5;
911 /* register arch-specific functions */
912 arm7_9->examine_debug_reason = arm9tdmi_examine_debug_reason;
913 arm7_9->change_to_arm = arm9tdmi_change_to_arm;
914 arm7_9->read_core_regs = arm9tdmi_read_core_regs;
915 arm7_9->read_core_regs_target_buffer = arm9tdmi_read_core_regs_target_buffer;
916 arm7_9->read_xpsr = arm9tdmi_read_xpsr;
918 arm7_9->write_xpsr = arm9tdmi_write_xpsr;
919 arm7_9->write_xpsr_im8 = arm9tdmi_write_xpsr_im8;
920 arm7_9->write_core_regs = arm9tdmi_write_core_regs;
922 arm7_9->load_word_regs = arm9tdmi_load_word_regs;
923 arm7_9->load_hword_reg = arm9tdmi_load_hword_reg;
924 arm7_9->load_byte_reg = arm9tdmi_load_byte_reg;
926 arm7_9->store_word_regs = arm9tdmi_store_word_regs;
927 arm7_9->store_hword_reg = arm9tdmi_store_hword_reg;
928 arm7_9->store_byte_reg = arm9tdmi_store_byte_reg;
930 arm7_9->write_pc = arm9tdmi_write_pc;
931 arm7_9->branch_resume = arm9tdmi_branch_resume;
932 arm7_9->branch_resume_thumb = arm9tdmi_branch_resume_thumb;
934 arm7_9->enable_single_step = arm9tdmi_enable_single_step;
935 arm7_9->disable_single_step = arm9tdmi_disable_single_step;
937 arm7_9->pre_debug_entry = NULL;
938 arm7_9->post_debug_entry = NULL;
940 arm7_9->pre_restore_context = NULL;
941 arm7_9->post_restore_context = NULL;
943 /* initialize arch-specific breakpoint handling */
944 arm7_9->arm_bkpt = 0xdeeedeee;
945 arm7_9->thumb_bkpt = 0xdeee;
947 arm7_9->sw_bkpts_use_wp = 1;
948 arm7_9->sw_bkpts_enabled = 0;
949 arm7_9->dbgreq_adjust_pc = 3;
950 arm7_9->arch_info = arm9tdmi;
952 arm9tdmi->common_magic = ARM9TDMI_COMMON_MAGIC;
953 arm9tdmi->arch_info = NULL;
957 arm9tdmi->variant = strdup(variant);
961 arm9tdmi->variant = strdup("");
964 arm7_9_init_arch_info(target, arm7_9);
966 /* override use of DBGRQ, this is safe on ARM9TDMI */
967 arm7_9->use_dbgrq = 1;
969 /* all ARM9s have the vector catch register */
970 arm7_9->has_vector_catch = 1;
975 int arm9tdmi_get_arch_pointers(target_t *target, armv4_5_common_t **armv4_5_p, arm7_9_common_t **arm7_9_p, arm9tdmi_common_t **arm9tdmi_p)
977 armv4_5_common_t *armv4_5 = target->arch_info;
978 arm7_9_common_t *arm7_9;
979 arm9tdmi_common_t *arm9tdmi;
981 if (armv4_5->common_magic != ARMV4_5_COMMON_MAGIC)
986 arm7_9 = armv4_5->arch_info;
987 if (arm7_9->common_magic != ARM7_9_COMMON_MAGIC)
992 arm9tdmi = arm7_9->arch_info;
993 if (arm9tdmi->common_magic != ARM9TDMI_COMMON_MAGIC)
998 *armv4_5_p = armv4_5;
1000 *arm9tdmi_p = arm9tdmi;
1006 /* target arm9tdmi <endianess> <startup_mode> <chain_pos> <variant>*/
1007 int arm9tdmi_target_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc, struct target_s *target)
1010 char *variant = NULL;
1011 arm9tdmi_common_t *arm9tdmi = malloc(sizeof(arm9tdmi_common_t));
1015 ERROR("'target arm9tdmi' requires at least one additional argument");
1019 chain_pos = strtoul(args[3], NULL, 0);
1024 arm9tdmi_init_arch_info(target, arm9tdmi, chain_pos, variant);
1029 int arm9tdmi_register_commands(struct command_context_s *cmd_ctx)
1033 command_t *arm9tdmi_cmd;
1036 retval = arm7_9_register_commands(cmd_ctx);
1038 arm9tdmi_cmd = register_command(cmd_ctx, NULL, "arm9tdmi", NULL, COMMAND_ANY, "arm9tdmi specific commands");
1040 register_command(cmd_ctx, arm9tdmi_cmd, "vector_catch", handle_arm9tdmi_catch_vectors_command, COMMAND_EXEC, "catch arm920t vectors ['all'|'none'|'<vec1 vec2 ...>']");
1047 int handle_arm9tdmi_catch_vectors_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
1049 target_t *target = get_current_target(cmd_ctx);
1050 armv4_5_common_t *armv4_5;
1051 arm7_9_common_t *arm7_9;
1052 arm9tdmi_common_t *arm9tdmi;
1053 reg_t *vector_catch;
1054 u32 vector_catch_value;
1057 if (arm9tdmi_get_arch_pointers(target, &armv4_5, &arm7_9, &arm9tdmi) != ERROR_OK)
1059 command_print(cmd_ctx, "current target isn't an ARM9TDMI based target");
1063 vector_catch = &arm7_9->eice_cache->reg_list[EICE_VEC_CATCH];
1065 /* read the vector catch register if necessary */
1066 if (!vector_catch->valid)
1067 embeddedice_read_reg(vector_catch);
1069 /* get the current setting */
1070 vector_catch_value = buf_get_u32(vector_catch->value, 0, 32);
1074 vector_catch_value = 0x0;
1075 if (strcmp(args[0], "all") == 0)
1077 vector_catch_value = 0xdf;
1079 else if (strcmp(args[0], "none") == 0)
1085 for (i = 0; i < argc; i++)
1087 /* go through list of vectors */
1088 for(j = 0; arm9tdmi_vectors[j].name; j++)
1090 if (strcmp(args[i], arm9tdmi_vectors[j].name) == 0)
1092 vector_catch_value |= arm9tdmi_vectors[j].value;
1097 /* complain if vector wasn't found */
1098 if (!arm9tdmi_vectors[j].name)
1100 command_print(cmd_ctx, "vector '%s' not found, leaving current setting unchanged", args[i]);
1102 /* reread current setting */
1103 vector_catch_value = buf_get_u32(vector_catch->value, 0, 32);
1110 /* store new settings */
1111 buf_set_u32(vector_catch->value, 0, 32, vector_catch_value);
1112 embeddedice_store_reg(vector_catch);
1115 /* output current settings (skip RESERVED vector) */
1116 for (i = 0; i < 8; i++)
1120 command_print(cmd_ctx, "%s: %s", arm9tdmi_vectors[i].name,
1121 (vector_catch_value & (1 << i)) ? "catch" : "don't catch");