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 ***************************************************************************/
22 #include "embeddedice.h"
25 #include "arm7_9_common.h"
30 #include "binarybuffer.h"
37 bitfield_desc_t embeddedice_comms_ctrl_bitfield_desc[] =
45 int embeddedice_reg_arch_info[] =
48 0x8, 0x9, 0xa, 0xb, 0xc, 0xd,
49 0x10, 0x11, 0x12, 0x13, 0x14, 0x15
52 char* embeddedice_reg_list[] =
64 "watch 0 control value",
65 "watch 0 control mask",
71 "watch 1 control value",
72 "watch 1 control mask"
75 int embeddedice_reg_arch_type = -1;
77 int embeddedice_get_reg(reg_t *reg);
78 int embeddedice_set_reg(reg_t *reg, u32 value);
80 int embeddedice_write_reg(reg_t *reg, u32 value);
81 int embeddedice_read_reg(reg_t *reg);
83 reg_cache_t* embeddedice_build_reg_cache(target_t *target, arm_jtag_t *jtag_info, int extra_reg)
85 reg_cache_t *reg_cache = malloc(sizeof(reg_cache_t));
86 reg_t *reg_list = NULL;
87 embeddedice_reg_t *arch_info = NULL;
88 int num_regs = 16 + extra_reg;
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 /* the actual registers are kept in two arrays */
96 reg_list = calloc(num_regs, sizeof(reg_t));
97 arch_info = calloc(num_regs, sizeof(embeddedice_reg_t));
99 /* fill in values for the reg cache */
100 reg_cache->name = "EmbeddedICE registers";
101 reg_cache->next = NULL;
102 reg_cache->reg_list = reg_list;
103 reg_cache->num_regs = num_regs;
105 /* set up registers */
106 for (i = 0; i < num_regs - extra_reg; i++)
108 reg_list[i].name = embeddedice_reg_list[i];
109 reg_list[i].size = 32;
110 reg_list[i].dirty = 0;
111 reg_list[i].valid = 0;
112 reg_list[i].bitfield_desc = NULL;
113 reg_list[i].num_bitfields = 0;
114 reg_list[i].value = calloc(1, 4);
115 reg_list[i].arch_info = &arch_info[i];
116 reg_list[i].arch_type = embeddedice_reg_arch_type;
117 arch_info[i].addr = embeddedice_reg_arch_info[i];
118 arch_info[i].jtag_info = jtag_info;
121 /* there may be one extra reg (Abort status (ARM7 rev4) or Vector catch (ARM9)) */
124 reg_list[num_regs - 1].arch_info = &arch_info[num_regs - 1];
125 arch_info[num_regs - 1].jtag_info = jtag_info;
131 int embeddedice_get_reg(reg_t *reg)
133 if (embeddedice_read_reg(reg) != ERROR_OK)
135 ERROR("BUG: error scheduling EmbeddedICE register read");
139 if (jtag_execute_queue() != ERROR_OK)
141 ERROR("register read failed");
147 int embeddedice_read_reg_w_check(reg_t *reg, u8* check_value, u8* check_mask)
149 embeddedice_reg_t *ice_reg = reg->arch_info;
150 u8 reg_addr = ice_reg->addr & 0x1f;
151 scan_field_t fields[3];
153 DEBUG("%i", ice_reg->addr);
155 jtag_add_end_state(TAP_RTI);
156 arm_jtag_scann(ice_reg->jtag_info, 0x2);
157 arm_jtag_set_instr(ice_reg->jtag_info, ice_reg->jtag_info->intest_instr);
159 fields[0].device = ice_reg->jtag_info->chain_pos;
160 fields[0].num_bits = 32;
161 fields[0].out_value = reg->value;
162 fields[0].out_mask = NULL;
163 fields[0].in_value = NULL;
164 fields[0].in_check_value = NULL;
165 fields[0].in_check_mask = NULL;
166 fields[0].in_handler = NULL;
167 fields[0].in_handler_priv = NULL;
169 fields[1].device = ice_reg->jtag_info->chain_pos;
170 fields[1].num_bits = 5;
171 fields[1].out_value = malloc(1);
172 buf_set_u32(fields[1].out_value, 0, 5, reg_addr);
173 fields[1].out_mask = NULL;
174 fields[1].in_value = NULL;
175 fields[1].in_check_value = NULL;
176 fields[1].in_check_mask = NULL;
177 fields[1].in_handler = NULL;
178 fields[1].in_handler_priv = NULL;
180 fields[2].device = ice_reg->jtag_info->chain_pos;
181 fields[2].num_bits = 1;
182 fields[2].out_value = malloc(1);
183 buf_set_u32(fields[2].out_value, 0, 1, 0);
184 fields[2].out_mask = NULL;
185 fields[2].in_value = NULL;
186 fields[2].in_check_value = NULL;
187 fields[2].in_check_mask = NULL;
188 fields[2].in_handler = NULL;
189 fields[2].in_handler_priv = NULL;
191 jtag_add_dr_scan(3, fields, -1);
193 fields[0].in_value = reg->value;
194 fields[0].in_check_value = check_value;
195 fields[0].in_check_mask = check_mask;
197 /* when reading the DCC data register, leaving the address field set to
198 * EICE_COMMS_DATA would read the register twice
199 * reading the control register is safe
201 buf_set_u32(fields[1].out_value, 0, 5, embeddedice_reg_arch_info[EICE_COMMS_CTRL]);
203 jtag_add_dr_scan(3, fields, -1);
205 free(fields[1].out_value);
206 free(fields[2].out_value);
211 int embeddedice_read_reg(reg_t *reg)
213 return embeddedice_read_reg_w_check(reg, NULL, NULL);
216 int embeddedice_set_reg(reg_t *reg, u32 value)
218 if (embeddedice_write_reg(reg, value) != ERROR_OK)
220 ERROR("BUG: error scheduling EmbeddedICE register write");
224 buf_set_u32(reg->value, 0, reg->size, value);
231 int embeddedice_set_reg_w_exec(reg_t *reg, u32 value)
233 embeddedice_set_reg(reg, value);
235 if (jtag_execute_queue() != ERROR_OK)
237 ERROR("register write failed");
243 int embeddedice_write_reg(reg_t *reg, u32 value)
245 embeddedice_reg_t *ice_reg = reg->arch_info;
246 u8 reg_addr = ice_reg->addr & 0x1f;
247 scan_field_t fields[3];
249 DEBUG("%i: 0x%8.8x", ice_reg->addr, value);
251 jtag_add_end_state(TAP_RTI);
252 arm_jtag_scann(ice_reg->jtag_info, 0x2);
253 arm_jtag_set_instr(ice_reg->jtag_info, ice_reg->jtag_info->intest_instr);
255 fields[0].device = ice_reg->jtag_info->chain_pos;
256 fields[0].num_bits = 32;
257 fields[0].out_value = malloc(4);
258 buf_set_u32(fields[0].out_value, 0, 32, value);
259 fields[0].out_mask = NULL;
260 fields[0].in_value = NULL;
261 fields[0].in_check_value = NULL;
262 fields[0].in_check_mask = NULL;
263 fields[0].in_handler = NULL;
264 fields[0].in_handler_priv = NULL;
266 fields[1].device = ice_reg->jtag_info->chain_pos;
267 fields[1].num_bits = 5;
268 fields[1].out_value = malloc(1);
269 buf_set_u32(fields[1].out_value, 0, 5, reg_addr);
270 fields[1].out_mask = NULL;
271 fields[1].in_value = NULL;
272 fields[1].in_check_value = NULL;
273 fields[1].in_check_mask = NULL;
274 fields[1].in_handler = NULL;
275 fields[1].in_handler_priv = NULL;
277 fields[2].device = ice_reg->jtag_info->chain_pos;
278 fields[2].num_bits = 1;
279 fields[2].out_value = malloc(1);
280 buf_set_u32(fields[2].out_value, 0, 1, 1);
281 fields[2].out_mask = NULL;
282 fields[2].in_value = NULL;
283 fields[2].in_check_value = NULL;
284 fields[2].in_check_mask = NULL;
285 fields[2].in_handler = NULL;
286 fields[2].in_handler_priv = NULL;
288 jtag_add_dr_scan(3, fields, -1);
290 free(fields[0].out_value);
291 free(fields[1].out_value);
292 free(fields[2].out_value);
297 int embeddedice_store_reg(reg_t *reg)
299 return embeddedice_write_reg(reg, buf_get_u32(reg->value, 0, reg->size));