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 #include "arm_opcodes.h"
  30
  31
  32 #if 0
  33 #define _DEBUG_INSTRUCTION_EXECUTION_
  34 #endif
  35
  36 int arm966e_init_arch_info(struct target *target, struct arm966e_common *arm966e, struct jtag_tap *tap)
  37 {
  38         struct arm7_9_common *arm7_9 = &arm966e->arm7_9_common;
  39
  40         /* initialize arm7/arm9 specific info (including armv4_5) */
  41         arm9tdmi_init_arch_info(target, arm7_9, tap);
  42
  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 *target, Jim_Interp *interp)
  55 {
  56         struct arm966e_common *arm966e = calloc(1,sizeof(struct arm966e_common));
  57
  58         return arm966e_init_arch_info(target, arm966e, target->tap);
  59 }
  60
  61 static int arm966e_verify_pointer(struct command_context *cmd_ctx,
  62                 struct arm966e_common *arm966e)
  63 {
  64         if (arm966e->common_magic != ARM966E_COMMON_MAGIC) {
  65                 command_print(cmd_ctx, "target is not an ARM966");
  66                 return ERROR_TARGET_INVALID;
  67         }
  68         return ERROR_OK;
  69 }
  70
  71 static int arm966e_read_cp15(struct target *target, int reg_addr, uint32_t *value)
  72 {
  73         int retval = ERROR_OK;
  74         struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
  75         struct arm_jtag *jtag_info = &arm7_9->jtag_info;
  76         struct scan_field fields[3];
  77         uint8_t reg_addr_buf = reg_addr & 0x3f;
  78         uint8_t nr_w_buf = 0;
  79
  80         jtag_set_end_state(TAP_IDLE);
  81         if ((retval = arm_jtag_scann(jtag_info, 0xf)) != ERROR_OK)
  82         {
  83                 return retval;
  84         }
  85         arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, NULL);
  86
  87         fields[0].tap = jtag_info->tap;
  88         fields[0].num_bits = 32;
  89         fields[0].out_value = NULL;
  90         fields[0].in_value = NULL;
  91
  92         fields[1].tap = jtag_info->tap;
  93         fields[1].num_bits = 6;
  94         fields[1].out_value = &reg_addr_buf;
  95         fields[1].in_value = NULL;
  96
  97         fields[2].tap = jtag_info->tap;
  98         fields[2].num_bits = 1;
  99         fields[2].out_value = &nr_w_buf;
 100         fields[2].in_value = NULL;
 101
 102         jtag_add_dr_scan(3, fields, jtag_get_end_state());
 103
 104         fields[1].in_value = (uint8_t *)value;
 105
 106         jtag_add_dr_scan(3, fields, jtag_get_end_state());
 107
 108         jtag_add_callback(arm_le_to_h_u32, (jtag_callback_data_t)value);
 109
 110
 111 #ifdef _DEBUG_INSTRUCTION_EXECUTION_
 112         if ((retval = jtag_execute_queue()) != ERROR_OK)
 113         {
 114                 return retval;
 115         }
 116         LOG_DEBUG("addr: 0x%x value: %8.8x", reg_addr, *value);
 117 #endif
 118
 119         return ERROR_OK;
 120 }
 121
 122 // EXPORTED to str9x (flash)
 123 int arm966e_write_cp15(struct target *target, int reg_addr, uint32_t value)
 124 {
 125         int retval = ERROR_OK;
 126         struct arm7_9_common *arm7_9 = target_to_arm7_9(target);
 127         struct arm_jtag *jtag_info = &arm7_9->jtag_info;
 128         struct scan_field fields[3];
 129         uint8_t reg_addr_buf = reg_addr & 0x3f;
 130         uint8_t nr_w_buf = 1;
 131         uint8_t value_buf[4];
 132
 133         buf_set_u32(value_buf, 0, 32, value);
 134
 135         jtag_set_end_state(TAP_IDLE);
 136         if ((retval = arm_jtag_scann(jtag_info, 0xf)) != ERROR_OK)
 137         {
 138                 return retval;
 139         }
 140         arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, NULL);
 141
 142         fields[0].tap = jtag_info->tap;
 143         fields[0].num_bits = 32;
 144         fields[0].out_value = value_buf;
 145         fields[0].in_value = NULL;
 146
 147         fields[1].tap = jtag_info->tap;
 148         fields[1].num_bits = 6;
 149         fields[1].out_value = &reg_addr_buf;
 150         fields[1].in_value = NULL;
 151
 152         fields[2].tap = jtag_info->tap;
 153         fields[2].num_bits = 1;
 154         fields[2].out_value = &nr_w_buf;
 155         fields[2].in_value = NULL;
 156
 157         jtag_add_dr_scan(3, fields, jtag_get_end_state());
 158
 159 #ifdef _DEBUG_INSTRUCTION_EXECUTION_
 160         LOG_DEBUG("addr: 0x%x value: %8.8x", reg_addr, value);
 161 #endif
 162
 163         return ERROR_OK;
 164 }
 165
 166 COMMAND_HANDLER(arm966e_handle_cp15_command)
 167 {
 168         int retval;
 169         struct target *target = get_current_target(CMD_CTX);
 170         struct arm966e_common *arm966e = target_to_arm966(target);
 171
 172         retval = arm966e_verify_pointer(CMD_CTX, arm966e);
 173         if (retval != ERROR_OK)
 174                 return retval;
 175
 176         if (target->state != TARGET_HALTED)
 177         {
 178                 command_print(CMD_CTX, "target must be stopped for \"%s\" command", CMD_NAME);
 179                 return ERROR_OK;
 180         }
 181
 182         /* one or more argument, access a single register (write if second argument is given */
 183         if (CMD_ARGC >= 1)
 184         {
 185                 uint32_t address;
 186                 COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], address);
 187
 188                 if (CMD_ARGC == 1)
 189                 {
 190                         uint32_t value;
 191                         if ((retval = arm966e_read_cp15(target, address, &value)) != ERROR_OK)
 192                         {
 193                                 command_print(CMD_CTX,
 194                                                 "couldn't access reg %" PRIi32,
 195                                                 address);
 196                                 return ERROR_OK;
 197                         }
 198                         if ((retval = jtag_execute_queue()) != ERROR_OK)
 199                         {
 200                                 return retval;
 201                         }
 202
 203                         command_print(CMD_CTX, "%" PRIi32 ": %8.8" PRIx32,
 204                                         address, value);
 205                 }
 206                 else if (CMD_ARGC == 2)
 207                 {
 208                         uint32_t value;
 209                         COMMAND_PARSE_NUMBER(u32, CMD_ARGV[1], value);
 210                         if ((retval = arm966e_write_cp15(target, address, value)) != ERROR_OK)
 211                         {
 212                                 command_print(CMD_CTX,
 213                                                 "couldn't access reg %" PRIi32,
 214                                                 address);
 215                                 return ERROR_OK;
 216                         }
 217                         command_print(CMD_CTX, "%" PRIi32 ": %8.8" PRIx32,
 218                                         address, value);
 219                 }
 220         }
 221
 222         return ERROR_OK;
 223 }
 224
 225 static const struct command_registration arm966e_exec_command_handlers[] = {
 226         {
 227                 .name = "cp15",
 228                 .handler = arm966e_handle_cp15_command,
 229                 .mode = COMMAND_EXEC,
 230                 .usage = "<opcode> [value]",
 231                 .help = "display/modify cp15 register",
 232         },
 233         COMMAND_REGISTRATION_DONE
 234 };
 235
 236 const struct command_registration arm966e_command_handlers[] = {
 237         {
 238                 .chain = arm9tdmi_command_handlers,
 239         },
 240         {
 241                 .name = "arm966e",
 242                 .mode = COMMAND_ANY,
 243                 .help = "arm966e command group",
 244                 .chain = arm966e_exec_command_handlers,
 245         },
 246         COMMAND_REGISTRATION_DONE
 247 };
 248
 249 /** Holds methods for ARM966 targets. */
 250 struct target_type arm966e_target =
 251 {
 252         .name = "arm966e",
 253
 254         .poll = arm7_9_poll,
 255         .arch_state = arm_arch_state,
 256
 257         .target_request_data = arm7_9_target_request_data,
 258
 259         .halt = arm7_9_halt,
 260         .resume = arm7_9_resume,
 261         .step = arm7_9_step,
 262
 263         .assert_reset = arm7_9_assert_reset,
 264         .deassert_reset = arm7_9_deassert_reset,
 265         .soft_reset_halt = arm7_9_soft_reset_halt,
 266
 267         .get_gdb_reg_list = arm_get_gdb_reg_list,
 268
 269         .read_memory = arm7_9_read_memory,
 270         .write_memory = arm7_9_write_memory,
 271         .bulk_write_memory = arm7_9_bulk_write_memory,
 272
 273         .checksum_memory = arm_checksum_memory,
 274         .blank_check_memory = arm_blank_check_memory,
 275
 276         .run_algorithm = armv4_5_run_algorithm,
 277
 278         .add_breakpoint = arm7_9_add_breakpoint,
 279         .remove_breakpoint = arm7_9_remove_breakpoint,
 280         .add_watchpoint = arm7_9_add_watchpoint,
 281         .remove_watchpoint = arm7_9_remove_watchpoint,
 282
 283         .commands = arm966e_command_handlers,
 284         .target_create = arm966e_target_create,
 285         .init_target = arm9tdmi_init_target,
 286         .examine = arm7_9_examine,
 287 };