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 int arm966e_init_arch_info(target_t *target, arm966e_common_t *arm966e, jtag_tap_t *tap)
  36 {
  37         arm9tdmi_common_t *arm9tdmi = &arm966e->arm9tdmi_common;
  38         arm7_9_common_t *arm7_9 = &arm9tdmi->arm7_9_common;
  39
  40         arm9tdmi_init_arch_info(target, arm9tdmi, tap);
  41
  42         arm9tdmi->arch_info = arm966e;
  43         arm966e->common_magic = ARM966E_COMMON_MAGIC;
  44
  45         /* The ARM966E-S implements the ARMv5TE architecture which
  46          * has the BKPT instruction, so we don't have to use a watchpoint comparator
  47          */
  48         arm7_9->arm_bkpt = ARMV5_BKPT(0x0);
  49         arm7_9->thumb_bkpt = ARMV5_T_BKPT(0x0) & 0xffff;
  50
  51         return ERROR_OK;
  52 }
  53
  54 static int arm966e_target_create(struct target_s *target, Jim_Interp *interp)
  55 {
  56         arm966e_common_t *arm966e = calloc(1,sizeof(arm966e_common_t));
  57
  58         return arm966e_init_arch_info(target, arm966e, target->tap);
  59 }
  60
  61 static int arm966e_get_arch_pointers(target_t *target,
  62                 armv4_5_common_t **armv4_5_p, arm7_9_common_t **arm7_9_p,
  63                 arm9tdmi_common_t **arm9tdmi_p, arm966e_common_t **arm966e_p)
  64 {
  65         armv4_5_common_t *armv4_5 = target->arch_info;
  66         arm7_9_common_t *arm7_9;
  67         arm9tdmi_common_t *arm9tdmi;
  68         arm966e_common_t *arm966e;
  69
  70         if (armv4_5->common_magic != ARMV4_5_COMMON_MAGIC)
  71         {
  72                 return -1;
  73         }
  74
  75         arm7_9 = armv4_5->arch_info;
  76         if (arm7_9->common_magic != ARM7_9_COMMON_MAGIC)
  77         {
  78                 return -1;
  79         }
  80
  81         arm9tdmi = arm7_9->arch_info;
  82         if (arm9tdmi->common_magic != ARM9TDMI_COMMON_MAGIC)
  83         {
  84                 return -1;
  85         }
  86
  87         arm966e = arm9tdmi->arch_info;
  88         if (arm966e->common_magic != ARM966E_COMMON_MAGIC)
  89         {
  90                 return -1;
  91         }
  92
  93         *armv4_5_p = armv4_5;
  94         *arm7_9_p = arm7_9;
  95         *arm9tdmi_p = arm9tdmi;
  96         *arm966e_p = arm966e;
  97
  98         return ERROR_OK;
  99 }
 100
 101 static int arm966e_read_cp15(target_t *target, int reg_addr, uint32_t *value)
 102 {
 103         int retval = ERROR_OK;
 104         armv4_5_common_t *armv4_5 = target->arch_info;
 105         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 106         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 107         scan_field_t fields[3];
 108         uint8_t reg_addr_buf = reg_addr & 0x3f;
 109         uint8_t nr_w_buf = 0;
 110
 111         jtag_set_end_state(TAP_IDLE);
 112         if ((retval = arm_jtag_scann(jtag_info, 0xf)) != ERROR_OK)
 113         {
 114                 return retval;
 115         }
 116         arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, NULL);
 117
 118         fields[0].tap = jtag_info->tap;
 119         fields[0].num_bits = 32;
 120         fields[0].out_value = NULL;
 121         fields[0].in_value = NULL;
 122
 123         fields[1].tap = jtag_info->tap;
 124         fields[1].num_bits = 6;
 125         fields[1].out_value = &reg_addr_buf;
 126         fields[1].in_value = NULL;
 127
 128         fields[2].tap = jtag_info->tap;
 129         fields[2].num_bits = 1;
 130         fields[2].out_value = &nr_w_buf;
 131         fields[2].in_value = NULL;
 132
 133         jtag_add_dr_scan(3, fields, jtag_get_end_state());
 134
 135         fields[1].in_value = (uint8_t *)value;
 136
 137         jtag_add_dr_scan(3, fields, jtag_get_end_state());
 138
 139         jtag_add_callback(arm_le_to_h_u32, (jtag_callback_data_t)value);
 140
 141
 142 #ifdef _DEBUG_INSTRUCTION_EXECUTION_
 143         if ((retval = jtag_execute_queue()) != ERROR_OK)
 144         {
 145                 return retval;
 146         }
 147         LOG_DEBUG("addr: 0x%x value: %8.8x", reg_addr, *value);
 148 #endif
 149
 150         return ERROR_OK;
 151 }
 152
 153 // EXPORTED to str9x (flash)
 154 int arm966e_write_cp15(target_t *target, int reg_addr, uint32_t value)
 155 {
 156         int retval = ERROR_OK;
 157         armv4_5_common_t *armv4_5 = target->arch_info;
 158         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 159         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 160         scan_field_t fields[3];
 161         uint8_t reg_addr_buf = reg_addr & 0x3f;
 162         uint8_t nr_w_buf = 1;
 163         uint8_t value_buf[4];
 164
 165         buf_set_u32(value_buf, 0, 32, value);
 166
 167         jtag_set_end_state(TAP_IDLE);
 168         if ((retval = arm_jtag_scann(jtag_info, 0xf)) != ERROR_OK)
 169         {
 170                 return retval;
 171         }
 172         arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, NULL);
 173
 174         fields[0].tap = jtag_info->tap;
 175         fields[0].num_bits = 32;
 176         fields[0].out_value = value_buf;
 177         fields[0].in_value = NULL;
 178
 179         fields[1].tap = jtag_info->tap;
 180         fields[1].num_bits = 6;
 181         fields[1].out_value = &reg_addr_buf;
 182         fields[1].in_value = NULL;
 183
 184         fields[2].tap = jtag_info->tap;
 185         fields[2].num_bits = 1;
 186         fields[2].out_value = &nr_w_buf;
 187         fields[2].in_value = NULL;
 188
 189         jtag_add_dr_scan(3, fields, jtag_get_end_state());
 190
 191 #ifdef _DEBUG_INSTRUCTION_EXECUTION_
 192         LOG_DEBUG("addr: 0x%x value: %8.8x", reg_addr, value);
 193 #endif
 194
 195         return ERROR_OK;
 196 }
 197
 198 static int arm966e_handle_cp15_command(struct command_context_s *cmd_ctx,
 199                 char *cmd, char **args, int argc)
 200 {
 201         int retval;
 202         target_t *target = get_current_target(cmd_ctx);
 203         armv4_5_common_t *armv4_5;
 204         arm7_9_common_t *arm7_9;
 205         arm9tdmi_common_t *arm9tdmi;
 206         arm966e_common_t *arm966e;
 207         arm_jtag_t *jtag_info;
 208
 209         if (arm966e_get_arch_pointers(target, &armv4_5, &arm7_9, &arm9tdmi, &arm966e) != ERROR_OK)
 210         {
 211                 command_print(cmd_ctx, "current target isn't an ARM966e target");
 212                 return ERROR_OK;
 213         }
 214
 215         jtag_info = &arm7_9->jtag_info;
 216
 217         if (target->state != TARGET_HALTED)
 218         {
 219                 command_print(cmd_ctx, "target must be stopped for \"%s\" command", cmd);
 220                 return ERROR_OK;
 221         }
 222
 223         /* one or more argument, access a single register (write if second argument is given */
 224         if (argc >= 1)
 225         {
 226                 uint32_t address;
 227                 COMMAND_PARSE_NUMBER(u32, args[0], address);
 228
 229                 if (argc == 1)
 230                 {
 231                         uint32_t value;
 232                         if ((retval = arm966e_read_cp15(target, address, &value)) != ERROR_OK)
 233                         {
 234                                 command_print(cmd_ctx, "couldn't access reg %i", address);
 235                                 return ERROR_OK;
 236                         }
 237                         if ((retval = jtag_execute_queue()) != ERROR_OK)
 238                         {
 239                                 return retval;
 240                         }
 241
 242                         command_print(cmd_ctx, "%i: %8.8" PRIx32 "", address, value);
 243                 }
 244                 else if (argc == 2)
 245                 {
 246                         uint32_t value;
 247                         COMMAND_PARSE_NUMBER(u32, args[1], value);
 248                         if ((retval = arm966e_write_cp15(target, address, value)) != ERROR_OK)
 249                         {
 250                                 command_print(cmd_ctx, "couldn't access reg %i", address);
 251                                 return ERROR_OK;
 252                         }
 253                         command_print(cmd_ctx, "%i: %8.8" PRIx32 "", address, value);
 254                 }
 255         }
 256
 257         return ERROR_OK;
 258 }
 259
 260 /** Registers commands used to access coprocessor resources. */
 261 int arm966e_register_commands(struct command_context_s *cmd_ctx)
 262 {
 263         int retval;
 264         command_t *arm966e_cmd;
 265
 266         retval = arm9tdmi_register_commands(cmd_ctx);
 267         arm966e_cmd = register_command(cmd_ctx, NULL, "arm966e",
 268                         NULL, COMMAND_ANY,
 269                         "arm966e specific commands");
 270         register_command(cmd_ctx, arm966e_cmd, "cp15",
 271                         arm966e_handle_cp15_command, COMMAND_EXEC,
 272                         "display/modify cp15 register <num> [value]");
 273
 274         return retval;
 275 }
 276
 277 /** Holds methods for ARM966 targets. */
 278 target_type_t arm966e_target =
 279 {
 280         .name = "arm966e",
 281
 282         .poll = arm7_9_poll,
 283         .arch_state = armv4_5_arch_state,
 284
 285         .target_request_data = arm7_9_target_request_data,
 286
 287         .halt = arm7_9_halt,
 288         .resume = arm7_9_resume,
 289         .step = arm7_9_step,
 290
 291         .assert_reset = arm7_9_assert_reset,
 292         .deassert_reset = arm7_9_deassert_reset,
 293         .soft_reset_halt = arm7_9_soft_reset_halt,
 294
 295         .get_gdb_reg_list = armv4_5_get_gdb_reg_list,
 296
 297         .read_memory = arm7_9_read_memory,
 298         .write_memory = arm7_9_write_memory,
 299         .bulk_write_memory = arm7_9_bulk_write_memory,
 300         .checksum_memory = arm7_9_checksum_memory,
 301         .blank_check_memory = arm7_9_blank_check_memory,
 302
 303         .run_algorithm = armv4_5_run_algorithm,
 304
 305         .add_breakpoint = arm7_9_add_breakpoint,
 306         .remove_breakpoint = arm7_9_remove_breakpoint,
 307         .add_watchpoint = arm7_9_add_watchpoint,
 308         .remove_watchpoint = arm7_9_remove_watchpoint,
 309
 310         .register_commands = arm966e_register_commands,
 311         .target_create = arm966e_target_create,
 312         .init_target = arm9tdmi_init_target,
 313         .examine = arm9tdmi_examine,
 314 };