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
  29
  30 #if 0
  31 #define _DEBUG_INSTRUCTION_EXECUTION_
  32 #endif
  33
  34 /* cli handling */
  35 int arm966e_register_commands(struct command_context_s *cmd_ctx);
  36
  37 /* forward declarations */
  38 int arm966e_target_create(struct target_s *target, Jim_Interp *interp);
  39 int arm966e_init_target(struct command_context_s *cmd_ctx, struct target_s *target);
  40 int arm966e_quit(void);
  41
  42 target_type_t arm966e_target =
  43 {
  44         .name = "arm966e",
  45
  46         .poll = arm7_9_poll,
  47         .arch_state = armv4_5_arch_state,
  48
  49         .target_request_data = arm7_9_target_request_data,
  50
  51         .halt = arm7_9_halt,
  52         .resume = arm7_9_resume,
  53         .step = arm7_9_step,
  54
  55         .assert_reset = arm7_9_assert_reset,
  56         .deassert_reset = arm7_9_deassert_reset,
  57         .soft_reset_halt = arm7_9_soft_reset_halt,
  58
  59         .get_gdb_reg_list = armv4_5_get_gdb_reg_list,
  60
  61         .read_memory = arm7_9_read_memory,
  62         .write_memory = arm7_9_write_memory,
  63         .bulk_write_memory = arm7_9_bulk_write_memory,
  64         .checksum_memory = arm7_9_checksum_memory,
  65         .blank_check_memory = arm7_9_blank_check_memory,
  66
  67         .run_algorithm = armv4_5_run_algorithm,
  68
  69         .add_breakpoint = arm7_9_add_breakpoint,
  70         .remove_breakpoint = arm7_9_remove_breakpoint,
  71         .add_watchpoint = arm7_9_add_watchpoint,
  72         .remove_watchpoint = arm7_9_remove_watchpoint,
  73
  74         .register_commands = arm966e_register_commands,
  75         .target_create = arm966e_target_create,
  76         .init_target = arm966e_init_target,
  77         .examine = arm9tdmi_examine,
  78         .quit = arm966e_quit,
  79 };
  80
  81 int arm966e_init_target(struct command_context_s *cmd_ctx, struct target_s *target)
  82 {
  83         arm9tdmi_init_target(cmd_ctx, target);
  84
  85         return ERROR_OK;
  86 }
  87
  88 int arm966e_quit(void)
  89 {
  90         return ERROR_OK;
  91 }
  92
  93 int arm966e_init_arch_info(target_t *target, arm966e_common_t *arm966e, jtag_tap_t *tap)
  94 {
  95         arm9tdmi_common_t *arm9tdmi = &arm966e->arm9tdmi_common;
  96         arm7_9_common_t *arm7_9 = &arm9tdmi->arm7_9_common;
  97
  98         arm9tdmi_init_arch_info(target, arm9tdmi, tap);
  99
 100         arm9tdmi->arch_info = arm966e;
 101         arm966e->common_magic = ARM966E_COMMON_MAGIC;
 102
 103         /* The ARM966E-S implements the ARMv5TE architecture which
 104          * has the BKPT instruction, so we don't have to use a watchpoint comparator
 105          */
 106         arm7_9->arm_bkpt = ARMV5_BKPT(0x0);
 107         arm7_9->thumb_bkpt = ARMV5_T_BKPT(0x0) & 0xffff;
 108
 109         return ERROR_OK;
 110 }
 111
 112 int arm966e_target_create( struct target_s *target, Jim_Interp *interp )
 113 {
 114         arm966e_common_t *arm966e = calloc(1,sizeof(arm966e_common_t));
 115
 116         arm966e_init_arch_info(target, arm966e, target->tap);
 117
 118         return ERROR_OK;
 119 }
 120
 121 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)
 122 {
 123         armv4_5_common_t *armv4_5 = target->arch_info;
 124         arm7_9_common_t *arm7_9;
 125         arm9tdmi_common_t *arm9tdmi;
 126         arm966e_common_t *arm966e;
 127
 128         if (armv4_5->common_magic != ARMV4_5_COMMON_MAGIC)
 129         {
 130                 return -1;
 131         }
 132
 133         arm7_9 = armv4_5->arch_info;
 134         if (arm7_9->common_magic != ARM7_9_COMMON_MAGIC)
 135         {
 136                 return -1;
 137         }
 138
 139         arm9tdmi = arm7_9->arch_info;
 140         if (arm9tdmi->common_magic != ARM9TDMI_COMMON_MAGIC)
 141         {
 142                 return -1;
 143         }
 144
 145         arm966e = arm9tdmi->arch_info;
 146         if (arm966e->common_magic != ARM966E_COMMON_MAGIC)
 147         {
 148                 return -1;
 149         }
 150
 151         *armv4_5_p = armv4_5;
 152         *arm7_9_p = arm7_9;
 153         *arm9tdmi_p = arm9tdmi;
 154         *arm966e_p = arm966e;
 155
 156         return ERROR_OK;
 157 }
 158
 159 int arm966e_read_cp15(target_t *target, int reg_addr, u32 *value)
 160 {
 161         int retval = ERROR_OK;
 162         armv4_5_common_t *armv4_5 = target->arch_info;
 163         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 164         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 165         scan_field_t fields[3];
 166         u8 reg_addr_buf = reg_addr & 0x3f;
 167         u8 nr_w_buf = 0;
 168
 169         jtag_add_end_state(TAP_IDLE);
 170         if ((retval = arm_jtag_scann(jtag_info, 0xf)) != ERROR_OK)
 171         {
 172                 return retval;
 173         }
 174         arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, NULL);
 175
 176         fields[0].tap = jtag_info->tap;
 177         fields[0].num_bits = 32;
 178         fields[0].out_value = NULL;
 179         fields[0].in_value = NULL;
 180
 181         fields[1].tap = jtag_info->tap;
 182         fields[1].num_bits = 6;
 183         fields[1].out_value = &reg_addr_buf;
 184         fields[1].in_value = NULL;
 185
 186         fields[2].tap = jtag_info->tap;
 187         fields[2].num_bits = 1;
 188         fields[2].out_value = &nr_w_buf;
 189         fields[2].in_value = NULL;
 190
 191         jtag_add_dr_scan(3, fields, TAP_INVALID);
 192
 193         u8 tmp[4];
 194         fields[1].in_value = tmp;
 195
 196         jtag_add_dr_scan_now(3, fields, TAP_INVALID);
 197
 198         *value=le_to_h_u32(tmp);
 199
 200
 201 #ifdef _DEBUG_INSTRUCTION_EXECUTION_
 202         if ((retval = jtag_execute_queue()) != ERROR_OK)
 203         {
 204                 return retval;
 205         }
 206         LOG_DEBUG("addr: 0x%x value: %8.8x", reg_addr, *value);
 207 #endif
 208
 209         return ERROR_OK;
 210 }
 211
 212 int arm966e_write_cp15(target_t *target, int reg_addr, u32 value)
 213 {
 214         int retval = ERROR_OK;
 215         armv4_5_common_t *armv4_5 = target->arch_info;
 216         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 217         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 218         scan_field_t fields[3];
 219         u8 reg_addr_buf = reg_addr & 0x3f;
 220         u8 nr_w_buf = 1;
 221         u8 value_buf[4];
 222
 223         buf_set_u32(value_buf, 0, 32, value);
 224
 225         jtag_add_end_state(TAP_IDLE);
 226         if ((retval = arm_jtag_scann(jtag_info, 0xf)) != ERROR_OK)
 227         {
 228                 return retval;
 229         }
 230         arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, NULL);
 231
 232         fields[0].tap = jtag_info->tap;
 233         fields[0].num_bits = 32;
 234         fields[0].out_value = value_buf;
 235         fields[0].in_value = NULL;
 236
 237         fields[1].tap = jtag_info->tap;
 238         fields[1].num_bits = 6;
 239         fields[1].out_value = &reg_addr_buf;
 240         fields[1].in_value = NULL;
 241
 242         fields[2].tap = jtag_info->tap;
 243         fields[2].num_bits = 1;
 244         fields[2].out_value = &nr_w_buf;
 245         fields[2].in_value = NULL;
 246
 247         jtag_add_dr_scan(3, fields, TAP_INVALID);
 248
 249 #ifdef _DEBUG_INSTRUCTION_EXECUTION_
 250         LOG_DEBUG("addr: 0x%x value: %8.8x", reg_addr, value);
 251 #endif
 252
 253         return ERROR_OK;
 254 }
 255
 256 int arm966e_handle_cp15_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 257 {
 258         int retval;
 259         target_t *target = get_current_target(cmd_ctx);
 260         armv4_5_common_t *armv4_5;
 261         arm7_9_common_t *arm7_9;
 262         arm9tdmi_common_t *arm9tdmi;
 263         arm966e_common_t *arm966e;
 264         arm_jtag_t *jtag_info;
 265
 266         if (arm966e_get_arch_pointers(target, &armv4_5, &arm7_9, &arm9tdmi, &arm966e) != ERROR_OK)
 267         {
 268                 command_print(cmd_ctx, "current target isn't an ARM966e target");
 269                 return ERROR_OK;
 270         }
 271
 272         jtag_info = &arm7_9->jtag_info;
 273
 274         if (target->state != TARGET_HALTED)
 275         {
 276                 command_print(cmd_ctx, "target must be stopped for \"%s\" command", cmd);
 277                 return ERROR_OK;
 278         }
 279
 280         /* one or more argument, access a single register (write if second argument is given */
 281         if (argc >= 1)
 282         {
 283                 int address = strtoul(args[0], NULL, 0);
 284
 285                 if (argc == 1)
 286                 {
 287                         u32 value;
 288                         if ((retval = arm966e_read_cp15(target, address, &value)) != ERROR_OK)
 289                         {
 290                                 command_print(cmd_ctx, "couldn't access reg %i", address);
 291                                 return ERROR_OK;
 292                         }
 293                         if ((retval = jtag_execute_queue()) != ERROR_OK)
 294                         {
 295                                 return retval;
 296                         }
 297
 298                         command_print(cmd_ctx, "%i: %8.8x", address, value);
 299                 }
 300                 else if (argc == 2)
 301                 {
 302                         u32 value = strtoul(args[1], NULL, 0);
 303                         if ((retval = arm966e_write_cp15(target, address, value)) != ERROR_OK)
 304                         {
 305                                 command_print(cmd_ctx, "couldn't access reg %i", address);
 306                                 return ERROR_OK;
 307                         }
 308                         command_print(cmd_ctx, "%i: %8.8x", address, value);
 309                 }
 310         }
 311
 312         return ERROR_OK;
 313 }
 314
 315 int arm966e_register_commands(struct command_context_s *cmd_ctx)
 316 {
 317         int retval;
 318         command_t *arm966e_cmd;
 319
 320         retval = arm9tdmi_register_commands(cmd_ctx);
 321         arm966e_cmd = register_command(cmd_ctx, NULL, "arm966e", NULL, COMMAND_ANY, "arm966e specific commands");
 322         register_command(cmd_ctx, arm966e_cmd, "cp15", arm966e_handle_cp15_command, COMMAND_EXEC, "display/modify cp15 register <num> [value]");
 323
 324         return retval;
 325 }