src/target/arm966e.c

   1 /***************************************************************************
   2  *   Copyright (C) 2005 by Dominic Rath                                    *
   3  *   Dominic.Rath@gmx.de                                                   *
   4  *                                                                         *
   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.                                   *
   9  *                                                                         *
  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.                          *
  14  *                                                                         *
  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  ***************************************************************************/
  20 #ifdef HAVE_CONFIG_H
  21 #include "config.h"
  22 #endif
  23
  24 #include "arm966e.h"
  25
  26 #include "arm7_9_common.h"
  27 #include "register.h"
  28 #include "target.h"
  29 #include "armv4_5.h"
  30 #include "embeddedice.h"
  31 #include "log.h"
  32 #include "jtag.h"
  33 #include "arm_jtag.h"
  34
  35 #include <stdlib.h>
  36 #include <string.h>
  37
  38 #if 0
  39 #define _DEBUG_INSTRUCTION_EXECUTION_
  40 #endif
  41
  42 /* cli handling */
  43 int arm966e_register_commands(struct command_context_s *cmd_ctx);
  44
  45 /* forward declarations */
  46 int arm966e_target_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc, struct target_s *target);
  47 int arm966e_init_target(struct command_context_s *cmd_ctx, struct target_s *target);
  48 int arm966e_quit(void);
  49
  50 target_type_t arm966e_target =
  51 {
  52         .name = "arm966e",
  53
  54         .poll = arm7_9_poll,
  55         .arch_state = armv4_5_arch_state,
  56
  57         .target_request_data = arm7_9_target_request_data,
  58
  59         .halt = arm7_9_halt,
  60         .resume = arm7_9_resume,
  61         .step = arm7_9_step,
  62
  63         .assert_reset = arm7_9_assert_reset,
  64         .deassert_reset = arm7_9_deassert_reset,
  65         .soft_reset_halt = arm7_9_soft_reset_halt,
  66         .prepare_reset_halt = arm7_9_prepare_reset_halt,
  67
  68         .get_gdb_reg_list = armv4_5_get_gdb_reg_list,
  69
  70         .read_memory = arm7_9_read_memory,
  71         .write_memory = arm7_9_write_memory,
  72         .bulk_write_memory = arm7_9_bulk_write_memory,
  73
  74         .run_algorithm = armv4_5_run_algorithm,
  75
  76         .add_breakpoint = arm7_9_add_breakpoint,
  77         .remove_breakpoint = arm7_9_remove_breakpoint,
  78         .add_watchpoint = arm7_9_add_watchpoint,
  79         .remove_watchpoint = arm7_9_remove_watchpoint,
  80
  81         .register_commands = arm966e_register_commands,
  82         .target_command = arm966e_target_command,
  83         .init_target = arm966e_init_target,
  84         .quit = arm966e_quit,
  85 };
  86
  87 int arm966e_init_target(struct command_context_s *cmd_ctx, struct target_s *target)
  88 {
  89         arm9tdmi_init_target(cmd_ctx, target);
  90
  91         return ERROR_OK;
  92 }
  93
  94 int arm966e_quit(void)
  95 {
  96
  97         return ERROR_OK;
  98 }
  99
 100 int arm966e_init_arch_info(target_t *target, arm966e_common_t *arm966e, int chain_pos, char *variant)
 101 {
 102         arm9tdmi_common_t *arm9tdmi = &arm966e->arm9tdmi_common;
 103         arm7_9_common_t *arm7_9 = &arm9tdmi->arm7_9_common;
 104
 105         arm9tdmi_init_arch_info(target, arm9tdmi, chain_pos, variant);
 106
 107         arm9tdmi->arch_info = arm966e;
 108         arm966e->common_magic = ARM966E_COMMON_MAGIC;
 109
 110         /* The ARM966E-S implements the ARMv5TE architecture which
 111          * has the BKPT instruction, so we don't have to use a watchpoint comparator
 112          */
 113         arm7_9->arm_bkpt = ARMV5_BKPT(0x0);
 114         arm7_9->thumb_bkpt = ARMV5_T_BKPT(0x0) & 0xffff;
 115
 116         arm7_9->sw_bkpts_use_wp = 0;
 117         arm7_9->sw_bkpts_enabled = 1;
 118
 119         return ERROR_OK;
 120 }
 121
 122 int arm966e_target_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc, struct target_s *target)
 123 {
 124         int chain_pos;
 125         char *variant = NULL;
 126         arm966e_common_t *arm966e = malloc(sizeof(arm966e_common_t));
 127
 128         if (argc < 4)
 129         {
 130                 ERROR("'target arm966e' requires at least one additional argument");
 131                 exit(-1);
 132         }
 133
 134         chain_pos = strtoul(args[3], NULL, 0);
 135
 136         if (argc >= 5)
 137                 variant = args[4];
 138
 139         DEBUG("chain_pos: %i, variant: %s", chain_pos, variant);
 140
 141         arm966e_init_arch_info(target, arm966e, chain_pos, variant);
 142
 143         return ERROR_OK;
 144 }
 145
 146 int arm966e_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, arm966e_common_t **arm966e_p)
 147 {
 148         armv4_5_common_t *armv4_5 = target->arch_info;
 149         arm7_9_common_t *arm7_9;
 150         arm9tdmi_common_t *arm9tdmi;
 151         arm966e_common_t *arm966e;
 152
 153         if (armv4_5->common_magic != ARMV4_5_COMMON_MAGIC)
 154         {
 155                 return -1;
 156         }
 157
 158         arm7_9 = armv4_5->arch_info;
 159         if (arm7_9->common_magic != ARM7_9_COMMON_MAGIC)
 160         {
 161                 return -1;
 162         }
 163
 164         arm9tdmi = arm7_9->arch_info;
 165         if (arm9tdmi->common_magic != ARM9TDMI_COMMON_MAGIC)
 166         {
 167                 return -1;
 168         }
 169
 170         arm966e = arm9tdmi->arch_info;
 171         if (arm966e->common_magic != ARM966E_COMMON_MAGIC)
 172         {
 173                 return -1;
 174         }
 175
 176         *armv4_5_p = armv4_5;
 177         *arm7_9_p = arm7_9;
 178         *arm9tdmi_p = arm9tdmi;
 179         *arm966e_p = arm966e;
 180
 181         return ERROR_OK;
 182 }
 183
 184 int arm966e_read_cp15(target_t *target, int reg_addr, u32 *value)
 185 {
 186         armv4_5_common_t *armv4_5 = target->arch_info;
 187         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 188         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 189         scan_field_t fields[3];
 190         u8 reg_addr_buf = reg_addr & 0x3f;
 191         u8 nr_w_buf = 0;
 192
 193         jtag_add_end_state(TAP_RTI);
 194         arm_jtag_scann(jtag_info, 0xf);
 195         arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, NULL);
 196
 197         fields[0].device = jtag_info->chain_pos;
 198         fields[0].num_bits = 32;
 199         fields[0].out_value = NULL;
 200         fields[0].out_mask = NULL;
 201         fields[0].in_value = NULL;
 202         fields[0].in_check_value = NULL;
 203         fields[0].in_check_mask = NULL;
 204         fields[0].in_handler = NULL;
 205         fields[0].in_handler_priv = NULL;
 206
 207         fields[1].device = jtag_info->chain_pos;
 208         fields[1].num_bits = 6;
 209         fields[1].out_value = &reg_addr_buf;
 210         fields[1].out_mask = NULL;
 211         fields[1].in_value = NULL;
 212         fields[1].in_check_value = NULL;
 213         fields[1].in_check_mask = NULL;
 214         fields[1].in_handler = NULL;
 215         fields[1].in_handler_priv = NULL;
 216
 217         fields[2].device = jtag_info->chain_pos;
 218         fields[2].num_bits = 1;
 219         fields[2].out_value = &nr_w_buf;
 220         fields[2].out_mask = NULL;
 221         fields[2].in_value = NULL;
 222         fields[2].in_check_value = NULL;
 223         fields[2].in_check_mask = NULL;
 224         fields[2].in_handler = NULL;
 225         fields[2].in_handler_priv = NULL;
 226
 227         jtag_add_dr_scan(3, fields, -1, NULL);
 228
 229         fields[0].in_value = (u8*)value;
 230
 231         jtag_add_dr_scan(3, fields, -1, NULL);
 232
 233         return ERROR_OK;
 234 }
 235
 236 int arm966e_write_cp15(target_t *target, int reg_addr, u32 value)
 237 {
 238         armv4_5_common_t *armv4_5 = target->arch_info;
 239         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 240         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 241         scan_field_t fields[3];
 242         u8 reg_addr_buf = reg_addr & 0x3f;
 243         u8 nr_w_buf = 1;
 244
 245         jtag_add_end_state(TAP_RTI);
 246         arm_jtag_scann(jtag_info, 0xf);
 247         arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, NULL);
 248
 249         fields[0].device = jtag_info->chain_pos;
 250         fields[0].num_bits = 32;
 251         fields[0].out_value = (u8*)&value;
 252         fields[0].out_mask = NULL;
 253         fields[0].in_value = NULL;
 254         fields[0].in_check_value = NULL;
 255         fields[0].in_check_mask = NULL;
 256         fields[0].in_handler = NULL;
 257         fields[0].in_handler_priv = NULL;
 258
 259         fields[1].device = jtag_info->chain_pos;
 260         fields[1].num_bits = 6;
 261         fields[1].out_value = &reg_addr_buf;
 262         fields[1].out_mask = NULL;
 263         fields[1].in_value = NULL;
 264         fields[1].in_check_value = NULL;
 265         fields[1].in_check_mask = NULL;
 266         fields[1].in_handler = NULL;
 267         fields[1].in_handler_priv = NULL;
 268
 269         fields[2].device = jtag_info->chain_pos;
 270         fields[2].num_bits = 1;
 271         fields[2].out_value = &nr_w_buf;
 272         fields[2].out_mask = NULL;
 273         fields[2].in_value = NULL;
 274         fields[2].in_check_value = NULL;
 275         fields[2].in_check_mask = NULL;
 276         fields[2].in_handler = NULL;
 277         fields[2].in_handler_priv = NULL;
 278
 279         jtag_add_dr_scan(3, fields, -1, NULL);
 280
 281         return ERROR_OK;
 282 }
 283
 284 int arm966e_handle_cp15_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 285 {
 286         int retval;
 287         target_t *target = get_current_target(cmd_ctx);
 288         armv4_5_common_t *armv4_5;
 289         arm7_9_common_t *arm7_9;
 290         arm9tdmi_common_t *arm9tdmi;
 291         arm966e_common_t *arm966e;
 292         arm_jtag_t *jtag_info;
 293
 294         if (arm966e_get_arch_pointers(target, &armv4_5, &arm7_9, &arm9tdmi, &arm966e) != ERROR_OK)
 295         {
 296                 command_print(cmd_ctx, "current target isn't an ARM966e target");
 297                 return ERROR_OK;
 298         }
 299
 300         jtag_info = &arm7_9->jtag_info;
 301
 302         if (target->state != TARGET_HALTED)
 303         {
 304                 command_print(cmd_ctx, "target must be stopped for \"%s\" command", cmd);
 305                 return ERROR_OK;
 306         }
 307
 308         /* one or more argument, access a single register (write if second argument is given */
 309         if (argc >= 1)
 310         {
 311                 int address = strtoul(args[0], NULL, 0);
 312
 313                 if (argc == 1)
 314                 {
 315                         u32 value;
 316                         if ((retval = arm966e_read_cp15(target, address, &value)) != ERROR_OK)
 317                         {
 318                                 command_print(cmd_ctx, "couldn't access reg %i", address);
 319                                 return ERROR_OK;
 320                         }
 321                         jtag_execute_queue();
 322
 323                         command_print(cmd_ctx, "%i: %8.8x", address, value);
 324                 }
 325                 else if (argc == 2)
 326                 {
 327                         u32 value = strtoul(args[1], NULL, 0);
 328                         if ((retval = arm966e_write_cp15(target, address, value)) != ERROR_OK)
 329                         {
 330                                 command_print(cmd_ctx, "couldn't access reg %i", address);
 331                                 return ERROR_OK;
 332                         }
 333                         command_print(cmd_ctx, "%i: %8.8x", address, value);
 334                 }
 335         }
 336
 337         return ERROR_OK;
 338 }
 339
 340 int arm966e_register_commands(struct command_context_s *cmd_ctx)
 341 {
 342         int retval;
 343         command_t *arm966e_cmd;
 344
 345         retval = arm9tdmi_register_commands(cmd_ctx);
 346         arm966e_cmd = register_command(cmd_ctx, NULL, "arm966e", NULL, COMMAND_ANY, "arm966e specific commands");
 347         register_command(cmd_ctx, arm966e_cmd, "cp15", arm966e_handle_cp15_command, COMMAND_EXEC, "display/modify cp15 register <num> [value]");
 348
 349         return ERROR_OK;
 350 }