src/target/arm966e.c

   1 /***************************************************************************
   2  *   Copyright (C) 2005 by Dominic Rath                                    *
   3  *   Dominic.Rath@gmx.de                                                   *
   4  *                                                                         *
   5  *   Copyright (C) 2008 by Spencer Oliver                                  *
   6  *   spen@spen-soft.co.uk                                                  *
   7  *                                                                         *
   8  *   This program is free software; you can redistribute it and/or modify  *
   9  *   it under the terms of the GNU General Public License as published by  *
  10  *   the Free Software Foundation; either version 2 of the License, or     *
  11  *   (at your option) any later version.                                   *
  12  *                                                                         *
  13  *   This program is distributed in the hope that it will be useful,       *
  14  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  15  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  16  *   GNU General Public License for more details.                          *
  17  *                                                                         *
  18  *   You should have received a copy of the GNU General Public License     *
  19  *   along with this program; if not, write to the                         *
  20  *   Free Software Foundation, Inc.,                                       *
  21  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  22  ***************************************************************************/
  23 #ifdef HAVE_CONFIG_H
  24 #include "config.h"
  25 #endif
  26
  27 #include "arm966e.h"
  28 #include "target_type.h"
  29
  30
  31 #if 0
  32 #define _DEBUG_INSTRUCTION_EXECUTION_
  33 #endif
  34
  35 /* forward declarations */
  36 int arm966e_target_create(struct target_s *target, Jim_Interp *interp);
  37 int arm966e_init_target(struct command_context_s *cmd_ctx, struct target_s *target);
  38
  39 target_type_t arm966e_target =
  40 {
  41         .name = "arm966e",
  42
  43         .poll = arm7_9_poll,
  44         .arch_state = armv4_5_arch_state,
  45
  46         .target_request_data = arm7_9_target_request_data,
  47
  48         .halt = arm7_9_halt,
  49         .resume = arm7_9_resume,
  50         .step = arm7_9_step,
  51
  52         .assert_reset = arm7_9_assert_reset,
  53         .deassert_reset = arm7_9_deassert_reset,
  54         .soft_reset_halt = arm7_9_soft_reset_halt,
  55
  56         .get_gdb_reg_list = armv4_5_get_gdb_reg_list,
  57
  58         .read_memory = arm7_9_read_memory,
  59         .write_memory = arm7_9_write_memory,
  60         .bulk_write_memory = arm7_9_bulk_write_memory,
  61         .checksum_memory = arm7_9_checksum_memory,
  62         .blank_check_memory = arm7_9_blank_check_memory,
  63
  64         .run_algorithm = armv4_5_run_algorithm,
  65
  66         .add_breakpoint = arm7_9_add_breakpoint,
  67         .remove_breakpoint = arm7_9_remove_breakpoint,
  68         .add_watchpoint = arm7_9_add_watchpoint,
  69         .remove_watchpoint = arm7_9_remove_watchpoint,
  70
  71         .register_commands = arm966e_register_commands,
  72         .target_create = arm966e_target_create,
  73         .init_target = arm966e_init_target,
  74         .examine = arm9tdmi_examine,
  75 };
  76
  77 int arm966e_init_target(struct command_context_s *cmd_ctx, struct target_s *target)
  78 {
  79         arm9tdmi_init_target(cmd_ctx, target);
  80
  81         return ERROR_OK;
  82 }
  83
  84 int arm966e_init_arch_info(target_t *target, arm966e_common_t *arm966e, jtag_tap_t *tap)
  85 {
  86         arm9tdmi_common_t *arm9tdmi = &arm966e->arm9tdmi_common;
  87         arm7_9_common_t *arm7_9 = &arm9tdmi->arm7_9_common;
  88
  89         arm9tdmi_init_arch_info(target, arm9tdmi, tap);
  90
  91         arm9tdmi->arch_info = arm966e;
  92         arm966e->common_magic = ARM966E_COMMON_MAGIC;
  93
  94         /* The ARM966E-S implements the ARMv5TE architecture which
  95          * has the BKPT instruction, so we don't have to use a watchpoint comparator
  96          */
  97         arm7_9->arm_bkpt = ARMV5_BKPT(0x0);
  98         arm7_9->thumb_bkpt = ARMV5_T_BKPT(0x0) & 0xffff;
  99
 100         return ERROR_OK;
 101 }
 102
 103 int arm966e_target_create(struct target_s *target, Jim_Interp *interp)
 104 {
 105         arm966e_common_t *arm966e = calloc(1,sizeof(arm966e_common_t));
 106
 107         arm966e_init_arch_info(target, arm966e, target->tap);
 108
 109         return ERROR_OK;
 110 }
 111
 112 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)
 113 {
 114         armv4_5_common_t *armv4_5 = target->arch_info;
 115         arm7_9_common_t *arm7_9;
 116         arm9tdmi_common_t *arm9tdmi;
 117         arm966e_common_t *arm966e;
 118
 119         if (armv4_5->common_magic != ARMV4_5_COMMON_MAGIC)
 120         {
 121                 return -1;
 122         }
 123
 124         arm7_9 = armv4_5->arch_info;
 125         if (arm7_9->common_magic != ARM7_9_COMMON_MAGIC)
 126         {
 127                 return -1;
 128         }
 129
 130         arm9tdmi = arm7_9->arch_info;
 131         if (arm9tdmi->common_magic != ARM9TDMI_COMMON_MAGIC)
 132         {
 133                 return -1;
 134         }
 135
 136         arm966e = arm9tdmi->arch_info;
 137         if (arm966e->common_magic != ARM966E_COMMON_MAGIC)
 138         {
 139                 return -1;
 140         }
 141
 142         *armv4_5_p = armv4_5;
 143         *arm7_9_p = arm7_9;
 144         *arm9tdmi_p = arm9tdmi;
 145         *arm966e_p = arm966e;
 146
 147         return ERROR_OK;
 148 }
 149
 150 int arm966e_read_cp15(target_t *target, int reg_addr, uint32_t *value)
 151 {
 152         int retval = ERROR_OK;
 153         armv4_5_common_t *armv4_5 = target->arch_info;
 154         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 155         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 156         scan_field_t fields[3];
 157         uint8_t reg_addr_buf = reg_addr & 0x3f;
 158         uint8_t nr_w_buf = 0;
 159
 160         jtag_set_end_state(TAP_IDLE);
 161         if ((retval = arm_jtag_scann(jtag_info, 0xf)) != ERROR_OK)
 162         {
 163                 return retval;
 164         }
 165         arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, NULL);
 166
 167         fields[0].tap = jtag_info->tap;
 168         fields[0].num_bits = 32;
 169         fields[0].out_value = NULL;
 170         fields[0].in_value = NULL;
 171
 172         fields[1].tap = jtag_info->tap;
 173         fields[1].num_bits = 6;
 174         fields[1].out_value = &reg_addr_buf;
 175         fields[1].in_value = NULL;
 176
 177         fields[2].tap = jtag_info->tap;
 178         fields[2].num_bits = 1;
 179         fields[2].out_value = &nr_w_buf;
 180         fields[2].in_value = NULL;
 181
 182         jtag_add_dr_scan(3, fields, jtag_get_end_state());
 183
 184         fields[1].in_value = (uint8_t *)value;
 185
 186         jtag_add_dr_scan(3, fields, jtag_get_end_state());
 187
 188         jtag_add_callback(arm_le_to_h_u32, (jtag_callback_data_t)value);
 189
 190
 191 #ifdef _DEBUG_INSTRUCTION_EXECUTION_
 192         if ((retval = jtag_execute_queue()) != ERROR_OK)
 193         {
 194                 return retval;
 195         }
 196         LOG_DEBUG("addr: 0x%x value: %8.8x", reg_addr, *value);
 197 #endif
 198
 199         return ERROR_OK;
 200 }
 201
 202 int arm966e_write_cp15(target_t *target, int reg_addr, uint32_t value)
 203 {
 204         int retval = ERROR_OK;
 205         armv4_5_common_t *armv4_5 = target->arch_info;
 206         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 207         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 208         scan_field_t fields[3];
 209         uint8_t reg_addr_buf = reg_addr & 0x3f;
 210         uint8_t nr_w_buf = 1;
 211         uint8_t value_buf[4];
 212
 213         buf_set_u32(value_buf, 0, 32, value);
 214
 215         jtag_set_end_state(TAP_IDLE);
 216         if ((retval = arm_jtag_scann(jtag_info, 0xf)) != ERROR_OK)
 217         {
 218                 return retval;
 219         }
 220         arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, NULL);
 221
 222         fields[0].tap = jtag_info->tap;
 223         fields[0].num_bits = 32;
 224         fields[0].out_value = value_buf;
 225         fields[0].in_value = NULL;
 226
 227         fields[1].tap = jtag_info->tap;
 228         fields[1].num_bits = 6;
 229         fields[1].out_value = &reg_addr_buf;
 230         fields[1].in_value = NULL;
 231
 232         fields[2].tap = jtag_info->tap;
 233         fields[2].num_bits = 1;
 234         fields[2].out_value = &nr_w_buf;
 235         fields[2].in_value = NULL;
 236
 237         jtag_add_dr_scan(3, fields, jtag_get_end_state());
 238
 239 #ifdef _DEBUG_INSTRUCTION_EXECUTION_
 240         LOG_DEBUG("addr: 0x%x value: %8.8x", reg_addr, value);
 241 #endif
 242
 243         return ERROR_OK;
 244 }
 245
 246 int arm966e_handle_cp15_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 247 {
 248         int retval;
 249         target_t *target = get_current_target(cmd_ctx);
 250         armv4_5_common_t *armv4_5;
 251         arm7_9_common_t *arm7_9;
 252         arm9tdmi_common_t *arm9tdmi;
 253         arm966e_common_t *arm966e;
 254         arm_jtag_t *jtag_info;
 255
 256         if (arm966e_get_arch_pointers(target, &armv4_5, &arm7_9, &arm9tdmi, &arm966e) != ERROR_OK)
 257         {
 258                 command_print(cmd_ctx, "current target isn't an ARM966e target");
 259                 return ERROR_OK;
 260         }
 261
 262         jtag_info = &arm7_9->jtag_info;
 263
 264         if (target->state != TARGET_HALTED)
 265         {
 266                 command_print(cmd_ctx, "target must be stopped for \"%s\" command", cmd);
 267                 return ERROR_OK;
 268         }
 269
 270         /* one or more argument, access a single register (write if second argument is given */
 271         if (argc >= 1)
 272         {
 273                 int address = strtoul(args[0], NULL, 0);
 274
 275                 if (argc == 1)
 276                 {
 277                         uint32_t value;
 278                         if ((retval = arm966e_read_cp15(target, address, &value)) != ERROR_OK)
 279                         {
 280                                 command_print(cmd_ctx, "couldn't access reg %i", address);
 281                                 return ERROR_OK;
 282                         }
 283                         if ((retval = jtag_execute_queue()) != ERROR_OK)
 284                         {
 285                                 return retval;
 286                         }
 287
 288                         command_print(cmd_ctx, "%i: %8.8" PRIx32 "", address, value);
 289                 }
 290                 else if (argc == 2)
 291                 {
 292                         uint32_t value = strtoul(args[1], NULL, 0);
 293                         if ((retval = arm966e_write_cp15(target, address, value)) != ERROR_OK)
 294                         {
 295                                 command_print(cmd_ctx, "couldn't access reg %i", address);
 296                                 return ERROR_OK;
 297                         }
 298                         command_print(cmd_ctx, "%i: %8.8" PRIx32 "", address, value);
 299                 }
 300         }
 301
 302         return ERROR_OK;
 303 }
 304
 305 int arm966e_register_commands(struct command_context_s *cmd_ctx)
 306 {
 307         int retval;
 308         command_t *arm966e_cmd;
 309
 310         retval = arm9tdmi_register_commands(cmd_ctx);
 311         arm966e_cmd = register_command(cmd_ctx, NULL, "arm966e", NULL, COMMAND_ANY, "arm966e specific commands");
 312         register_command(cmd_ctx, arm966e_cmd, "cp15", arm966e_handle_cp15_command, COMMAND_EXEC, "display/modify cp15 register <num> [value]");
 313
 314         return retval;
 315 }