1 /***************************************************************************
2 * Copyright (C) 2005 by Dominic Rath *
3 * Dominic.Rath@gmx.de *
5 * Copyright (C) 2007,2008 Øyvind Harboe *
6 * oyvind.harboe@zylin.com *
8 * Copyright (C) 2008 by Spencer Oliver *
9 * spen@spen-soft.co.uk *
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 ***************************************************************************/
30 #include "embeddedice.h"
34 static bitfield_desc_t embeddedice_comms_ctrl_bitfield_desc[] =
43 static int embeddedice_reg_arch_info[] =
46 0x8, 0x9, 0xa, 0xb, 0xc, 0xd,
47 0x10, 0x11, 0x12, 0x13, 0x14, 0x15,
51 static char* embeddedice_reg_list[] =
63 "watch 0 control value",
64 "watch 0 control mask",
70 "watch 1 control value",
71 "watch 1 control mask",
76 static int embeddedice_reg_arch_type = -1;
78 static int embeddedice_get_reg(reg_t *reg);
80 reg_cache_t* embeddedice_build_reg_cache(target_t *target, arm7_9_common_t *arm7_9)
83 reg_cache_t *reg_cache = malloc(sizeof(reg_cache_t));
84 reg_t *reg_list = NULL;
85 embeddedice_reg_t *arch_info = NULL;
86 arm_jtag_t *jtag_info = &arm7_9->jtag_info;
91 /* register a register arch-type for EmbeddedICE registers only once */
92 if (embeddedice_reg_arch_type == -1)
93 embeddedice_reg_arch_type = register_reg_arch_type(embeddedice_get_reg, embeddedice_set_reg_w_exec);
95 if (arm7_9->has_vector_catch)
100 /* the actual registers are kept in two arrays */
101 reg_list = calloc(num_regs, sizeof(reg_t));
102 arch_info = calloc(num_regs, sizeof(embeddedice_reg_t));
104 /* fill in values for the reg cache */
105 reg_cache->name = "EmbeddedICE registers";
106 reg_cache->next = NULL;
107 reg_cache->reg_list = reg_list;
108 reg_cache->num_regs = num_regs;
110 /* set up registers */
111 for (i = 0; i < num_regs; i++)
113 reg_list[i].name = embeddedice_reg_list[i];
114 reg_list[i].size = 32;
115 reg_list[i].dirty = 0;
116 reg_list[i].valid = 0;
117 reg_list[i].bitfield_desc = NULL;
118 reg_list[i].num_bitfields = 0;
119 reg_list[i].value = calloc(1, 4);
120 reg_list[i].arch_info = &arch_info[i];
121 reg_list[i].arch_type = embeddedice_reg_arch_type;
122 arch_info[i].addr = embeddedice_reg_arch_info[i];
123 arch_info[i].jtag_info = jtag_info;
126 /* identify EmbeddedICE version by reading DCC control register */
127 embeddedice_read_reg(®_list[EICE_COMMS_CTRL]);
128 if ((retval=jtag_execute_queue())!=ERROR_OK)
130 for (i = 0; i < num_regs; i++)
132 free(reg_list[i].value);
139 eice_version = buf_get_u32(reg_list[EICE_COMMS_CTRL].value, 28, 4);
141 switch (eice_version)
144 reg_list[EICE_DBG_CTRL].size = 3;
145 reg_list[EICE_DBG_STAT].size = 5;
148 reg_list[EICE_DBG_CTRL].size = 4;
149 reg_list[EICE_DBG_STAT].size = 5;
150 arm7_9->has_single_step = 1;
153 LOG_ERROR("EmbeddedICE version 3 detected, EmbeddedICE handling might be broken");
154 reg_list[EICE_DBG_CTRL].size = 6;
155 reg_list[EICE_DBG_STAT].size = 5;
156 arm7_9->has_single_step = 1;
157 arm7_9->has_monitor_mode = 1;
160 reg_list[EICE_DBG_CTRL].size = 6;
161 reg_list[EICE_DBG_STAT].size = 5;
162 arm7_9->has_monitor_mode = 1;
165 reg_list[EICE_DBG_CTRL].size = 6;
166 reg_list[EICE_DBG_STAT].size = 5;
167 arm7_9->has_single_step = 1;
168 arm7_9->has_monitor_mode = 1;
171 reg_list[EICE_DBG_CTRL].size = 6;
172 reg_list[EICE_DBG_STAT].size = 10;
173 arm7_9->has_monitor_mode = 1;
176 LOG_WARNING("EmbeddedICE version 7 detected, EmbeddedICE handling might be broken");
177 reg_list[EICE_DBG_CTRL].size = 6;
178 reg_list[EICE_DBG_STAT].size = 5;
179 arm7_9->has_monitor_mode = 1;
182 LOG_ERROR("unknown EmbeddedICE version (comms ctrl: 0x%8.8x)", buf_get_u32(reg_list[EICE_COMMS_CTRL].value, 0, 32));
188 int embeddedice_setup(target_t *target)
191 armv4_5_common_t *armv4_5 = target->arch_info;
192 arm7_9_common_t *arm7_9 = armv4_5->arch_info;
194 /* explicitly disable monitor mode */
195 if (arm7_9->has_monitor_mode)
197 reg_t *dbg_ctrl = &arm7_9->eice_cache->reg_list[EICE_DBG_CTRL];
199 embeddedice_read_reg(dbg_ctrl);
200 if ((retval=jtag_execute_queue())!=ERROR_OK)
202 buf_set_u32(dbg_ctrl->value, 4, 1, 0);
203 embeddedice_set_reg_w_exec(dbg_ctrl, dbg_ctrl->value);
205 return jtag_execute_queue();
208 static int embeddedice_get_reg(reg_t *reg)
211 if ((retval = embeddedice_read_reg(reg)) != ERROR_OK)
213 LOG_ERROR("BUG: error scheduling EmbeddedICE register read");
217 if ((retval = jtag_execute_queue()) != ERROR_OK)
219 LOG_ERROR("register read failed");
226 int embeddedice_read_reg_w_check(reg_t *reg, u8* check_value, u8* check_mask)
228 embeddedice_reg_t *ice_reg = reg->arch_info;
229 u8 reg_addr = ice_reg->addr & 0x1f;
230 scan_field_t fields[3];
234 jtag_add_end_state(TAP_IDLE);
235 arm_jtag_scann(ice_reg->jtag_info, 0x2);
237 arm_jtag_set_instr(ice_reg->jtag_info, ice_reg->jtag_info->intest_instr, NULL);
239 fields[0].tap = ice_reg->jtag_info->tap;
240 fields[0].num_bits = 32;
241 fields[0].out_value = reg->value;
242 fields[0].in_value = NULL;
245 fields[1].tap = ice_reg->jtag_info->tap;
246 fields[1].num_bits = 5;
247 fields[1].out_value = field1_out;
248 buf_set_u32(fields[1].out_value, 0, 5, reg_addr);
249 fields[1].in_value = NULL;
252 fields[2].tap = ice_reg->jtag_info->tap;
253 fields[2].num_bits = 1;
254 fields[2].out_value = field2_out;
255 buf_set_u32(fields[2].out_value, 0, 1, 0);
256 fields[2].in_value = NULL;
259 jtag_add_dr_scan(3, fields, TAP_INVALID);
261 fields[0].in_value = reg->value;
263 /* when reading the DCC data register, leaving the address field set to
264 * EICE_COMMS_DATA would read the register twice
265 * reading the control register is safe
267 buf_set_u32(fields[1].out_value, 0, 5, embeddedice_reg_arch_info[EICE_COMMS_CTRL]);
269 jtag_add_dr_scan(3, fields, TAP_INVALID);
271 jtag_check_value_mask(fields+0, check_value, check_mask);
276 /* receive <size> words of 32 bit from the DCC
277 * we pretend the target is always going to be fast enough
278 * (relative to the JTAG clock), so we don't need to handshake
280 int embeddedice_receive(arm_jtag_t *jtag_info, u32 *data, u32 size)
282 scan_field_t fields[3];
286 jtag_add_end_state(TAP_IDLE);
287 arm_jtag_scann(jtag_info, 0x2);
288 arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, NULL);
290 fields[0].tap = jtag_info->tap;
291 fields[0].num_bits = 32;
292 fields[0].out_value = NULL;
294 fields[0].in_value = tmp;
297 fields[1].tap = jtag_info->tap;
298 fields[1].num_bits = 5;
299 fields[1].out_value = field1_out;
300 buf_set_u32(fields[1].out_value, 0, 5, embeddedice_reg_arch_info[EICE_COMMS_DATA]);
301 fields[1].in_value = NULL;
304 fields[2].tap = jtag_info->tap;
305 fields[2].num_bits = 1;
306 fields[2].out_value = field2_out;
307 buf_set_u32(fields[2].out_value, 0, 1, 0);
308 fields[2].in_value = NULL;
311 jtag_add_dr_scan(3, fields, TAP_INVALID);
315 /* when reading the last item, set the register address to the DCC control reg,
316 * to avoid reading additional data from the DCC data reg
319 buf_set_u32(fields[1].out_value, 0, 5, embeddedice_reg_arch_info[EICE_COMMS_CTRL]);
321 jtag_add_dr_scan_now(3, fields, TAP_INVALID);
323 *data = le_to_h_u32(tmp);
329 return jtag_execute_queue();
332 int embeddedice_read_reg(reg_t *reg)
334 return embeddedice_read_reg_w_check(reg, NULL, NULL);
337 void embeddedice_set_reg(reg_t *reg, u32 value)
339 embeddedice_write_reg(reg, value);
341 buf_set_u32(reg->value, 0, reg->size, value);
347 int embeddedice_set_reg_w_exec(reg_t *reg, u8 *buf)
350 embeddedice_set_reg(reg, buf_get_u32(buf, 0, reg->size));
352 if ((retval = jtag_execute_queue()) != ERROR_OK)
354 LOG_ERROR("register write failed");
360 void embeddedice_write_reg(reg_t *reg, u32 value)
362 embeddedice_reg_t *ice_reg = reg->arch_info;
364 LOG_DEBUG("%i: 0x%8.8x", ice_reg->addr, value);
366 jtag_add_end_state(TAP_IDLE);
367 arm_jtag_scann(ice_reg->jtag_info, 0x2);
369 arm_jtag_set_instr(ice_reg->jtag_info, ice_reg->jtag_info->intest_instr, NULL);
371 u8 reg_addr = ice_reg->addr & 0x1f;
372 embeddedice_write_reg_inner(ice_reg->jtag_info->tap, reg_addr, value);
376 void embeddedice_store_reg(reg_t *reg)
378 embeddedice_write_reg(reg, buf_get_u32(reg->value, 0, reg->size));
381 /* send <size> words of 32 bit to the DCC
382 * we pretend the target is always going to be fast enough
383 * (relative to the JTAG clock), so we don't need to handshake
385 int embeddedice_send(arm_jtag_t *jtag_info, u32 *data, u32 size)
387 scan_field_t fields[3];
392 jtag_add_end_state(TAP_IDLE);
393 arm_jtag_scann(jtag_info, 0x2);
394 arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, NULL);
396 fields[0].tap = jtag_info->tap;
397 fields[0].num_bits = 32;
398 fields[0].out_value = field0_out;
400 fields[0].in_value = NULL;
406 fields[1].tap = jtag_info->tap;
407 fields[1].num_bits = 5;
408 fields[1].out_value = field1_out;
409 buf_set_u32(fields[1].out_value, 0, 5, embeddedice_reg_arch_info[EICE_COMMS_DATA]);
411 fields[1].in_value = NULL;
417 fields[2].tap = jtag_info->tap;
418 fields[2].num_bits = 1;
419 fields[2].out_value = field2_out;
420 buf_set_u32(fields[2].out_value, 0, 1, 1);
422 fields[2].in_value = NULL;
430 buf_set_u32(fields[0].out_value, 0, 32, *data);
431 jtag_add_dr_scan(3, fields, TAP_INVALID);
437 /* call to jtag_execute_queue() intentionally omitted */
441 /* wait for DCC control register R/W handshake bit to become active
443 int embeddedice_handshake(arm_jtag_t *jtag_info, int hsbit, u32 timeout)
445 scan_field_t fields[3];
454 if (hsbit == EICE_COMM_CTRL_WBIT)
456 else if (hsbit == EICE_COMM_CTRL_RBIT)
459 return ERROR_INVALID_ARGUMENTS;
461 jtag_add_end_state(TAP_IDLE);
462 arm_jtag_scann(jtag_info, 0x2);
463 arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, NULL);
465 fields[0].tap = jtag_info->tap;
466 fields[0].num_bits = 32;
467 fields[0].out_value = NULL;
469 fields[0].in_value = field0_in;
475 fields[1].tap = jtag_info->tap;
476 fields[1].num_bits = 5;
477 fields[1].out_value = field1_out;
478 buf_set_u32(fields[1].out_value, 0, 5, embeddedice_reg_arch_info[EICE_COMMS_CTRL]);
480 fields[1].in_value = NULL;
486 fields[2].tap = jtag_info->tap;
487 fields[2].num_bits = 1;
488 fields[2].out_value = field2_out;
489 buf_set_u32(fields[2].out_value, 0, 1, 0);
491 fields[2].in_value = NULL;
497 jtag_add_dr_scan(3, fields, TAP_INVALID);
498 gettimeofday(&lap, NULL);
501 jtag_add_dr_scan(3, fields, TAP_INVALID);
502 if ((retval = jtag_execute_queue()) != ERROR_OK)
505 if (buf_get_u32(field0_in, hsbit, 1) == hsact)
508 gettimeofday(&now, NULL);
510 while ((u32)((now.tv_sec-lap.tv_sec)*1000 + (now.tv_usec-lap.tv_usec)/1000) <= timeout);
512 return ERROR_TARGET_TIMEOUT;
515 /* this is the inner loop of the open loop DCC write of data to target */
516 void MINIDRIVER(embeddedice_write_dcc)(jtag_tap_t *tap, int reg_addr, u8 *buffer, int little, int count)
519 for (i = 0; i < count; i++)
521 embeddedice_write_reg_inner(tap, reg_addr, fast_target_buffer_get_u32(buffer, little));