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 #include "arm7_9_common.h"
  30 #include "register.h"
  31 #include "target.h"
  32 #include "armv4_5.h"
  33 #include "embeddedice.h"
  34 #include "log.h"
  35 #include "jtag.h"
  36 #include "arm_jtag.h"
  37
  38 #include <stdlib.h>
  39 #include <string.h>
  40
  41 #if 0
  42 #define _DEBUG_INSTRUCTION_EXECUTION_
  43 #endif
  44
  45 /* cli handling */
  46 int arm966e_register_commands(struct command_context_s *cmd_ctx);
  47
  48 /* forward declarations */
  49 int arm966e_target_create(struct target_s *target, Jim_Interp *interp);
  50 int arm966e_init_target(struct command_context_s *cmd_ctx, struct target_s *target);
  51 int arm966e_quit(void);
  52
  53 target_type_t arm966e_target =
  54 {
  55         .name = "arm966e",
  56
  57         .poll = arm7_9_poll,
  58         .arch_state = armv4_5_arch_state,
  59
  60         .target_request_data = arm7_9_target_request_data,
  61
  62         .halt = arm7_9_halt,
  63         .resume = arm7_9_resume,
  64         .step = arm7_9_step,
  65
  66         .assert_reset = arm7_9_assert_reset,
  67         .deassert_reset = arm7_9_deassert_reset,
  68         .soft_reset_halt = arm7_9_soft_reset_halt,
  69
  70         .get_gdb_reg_list = armv4_5_get_gdb_reg_list,
  71
  72         .read_memory = arm7_9_read_memory,
  73         .write_memory = arm7_9_write_memory,
  74         .bulk_write_memory = arm7_9_bulk_write_memory,
  75         .checksum_memory = arm7_9_checksum_memory,
  76         .blank_check_memory = arm7_9_blank_check_memory,
  77
  78         .run_algorithm = armv4_5_run_algorithm,
  79
  80         .add_breakpoint = arm7_9_add_breakpoint,
  81         .remove_breakpoint = arm7_9_remove_breakpoint,
  82         .add_watchpoint = arm7_9_add_watchpoint,
  83         .remove_watchpoint = arm7_9_remove_watchpoint,
  84
  85         .register_commands = arm966e_register_commands,
  86         .target_create = arm966e_target_create,
  87         .init_target = arm966e_init_target,
  88         .examine = arm9tdmi_examine,
  89         .quit = arm966e_quit,
  90 };
  91
  92 int arm966e_init_target(struct command_context_s *cmd_ctx, struct target_s *target)
  93 {
  94         arm9tdmi_init_target(cmd_ctx, target);
  95
  96         return ERROR_OK;
  97 }
  98
  99 int arm966e_quit(void)
 100 {
 101         return ERROR_OK;
 102 }
 103
 104 int arm966e_init_arch_info(target_t *target, arm966e_common_t *arm966e, jtag_tap_t *tap)
 105 {
 106         arm9tdmi_common_t *arm9tdmi = &arm966e->arm9tdmi_common;
 107         arm7_9_common_t *arm7_9 = &arm9tdmi->arm7_9_common;
 108
 109         arm9tdmi_init_arch_info(target, arm9tdmi, tap);
 110
 111         arm9tdmi->arch_info = arm966e;
 112         arm966e->common_magic = ARM966E_COMMON_MAGIC;
 113
 114         /* The ARM966E-S implements the ARMv5TE architecture which
 115          * has the BKPT instruction, so we don't have to use a watchpoint comparator
 116          */
 117         arm7_9->arm_bkpt = ARMV5_BKPT(0x0);
 118         arm7_9->thumb_bkpt = ARMV5_T_BKPT(0x0) & 0xffff;
 119
 120         return ERROR_OK;
 121 }
 122
 123 int arm966e_target_create( struct target_s *target, Jim_Interp *interp )
 124 {
 125         arm966e_common_t *arm966e = calloc(1,sizeof(arm966e_common_t));
 126
 127         arm966e_init_arch_info(target, arm966e, target->tap);
 128
 129         return ERROR_OK;
 130 }
 131
 132 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)
 133 {
 134         armv4_5_common_t *armv4_5 = target->arch_info;
 135         arm7_9_common_t *arm7_9;
 136         arm9tdmi_common_t *arm9tdmi;
 137         arm966e_common_t *arm966e;
 138
 139         if (armv4_5->common_magic != ARMV4_5_COMMON_MAGIC)
 140         {
 141                 return -1;
 142         }
 143
 144         arm7_9 = armv4_5->arch_info;
 145         if (arm7_9->common_magic != ARM7_9_COMMON_MAGIC)
 146         {
 147                 return -1;
 148         }
 149
 150         arm9tdmi = arm7_9->arch_info;
 151         if (arm9tdmi->common_magic != ARM9TDMI_COMMON_MAGIC)
 152         {
 153                 return -1;
 154         }
 155
 156         arm966e = arm9tdmi->arch_info;
 157         if (arm966e->common_magic != ARM966E_COMMON_MAGIC)
 158         {
 159                 return -1;
 160         }
 161
 162         *armv4_5_p = armv4_5;
 163         *arm7_9_p = arm7_9;
 164         *arm9tdmi_p = arm9tdmi;
 165         *arm966e_p = arm966e;
 166
 167         return ERROR_OK;
 168 }
 169
 170 int arm966e_read_cp15(target_t *target, int reg_addr, u32 *value)
 171 {
 172         int retval = ERROR_OK;
 173         armv4_5_common_t *armv4_5 = target->arch_info;
 174         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 175         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 176         scan_field_t fields[3];
 177         u8 reg_addr_buf = reg_addr & 0x3f;
 178         u8 nr_w_buf = 0;
 179
 180         jtag_add_end_state(TAP_IDLE);
 181         if ((retval = arm_jtag_scann(jtag_info, 0xf)) != ERROR_OK)
 182         {
 183                 return retval;
 184         }
 185         arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, NULL);
 186
 187         fields[0].tap = jtag_info->tap;
 188         fields[0].num_bits = 32;
 189         fields[0].out_value = NULL;
 190         fields[0].in_value = NULL;
 191
 192         fields[1].tap = jtag_info->tap;
 193         fields[1].num_bits = 6;
 194         fields[1].out_value = &reg_addr_buf;
 195         fields[1].in_value = NULL;
 196
 197         fields[2].tap = jtag_info->tap;
 198         fields[2].num_bits = 1;
 199         fields[2].out_value = &nr_w_buf;
 200         fields[2].in_value = NULL;
 201
 202         jtag_add_dr_scan(3, fields, TAP_INVALID);
 203
 204         u8 tmp[4];
 205         fields[1].in_value = tmp;
 206
 207         jtag_add_dr_scan_now(3, fields, TAP_INVALID);
 208
 209         *value=le_to_h_u32(tmp);
 210
 211
 212 #ifdef _DEBUG_INSTRUCTION_EXECUTION_
 213         if ((retval = jtag_execute_queue()) != ERROR_OK)
 214         {
 215                 return retval;
 216         }
 217         LOG_DEBUG("addr: 0x%x value: %8.8x", reg_addr, *value);
 218 #endif
 219
 220         return ERROR_OK;
 221 }
 222
 223 int arm966e_write_cp15(target_t *target, int reg_addr, u32 value)
 224 {
 225         int retval = ERROR_OK;
 226         armv4_5_common_t *armv4_5 = target->arch_info;
 227         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 228         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 229         scan_field_t fields[3];
 230         u8 reg_addr_buf = reg_addr & 0x3f;
 231         u8 nr_w_buf = 1;
 232         u8 value_buf[4];
 233
 234         buf_set_u32(value_buf, 0, 32, value);
 235
 236         jtag_add_end_state(TAP_IDLE);
 237         if ((retval = arm_jtag_scann(jtag_info, 0xf)) != ERROR_OK)
 238         {
 239                 return retval;
 240         }
 241         arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, NULL);
 242
 243         fields[0].tap = jtag_info->tap;
 244         fields[0].num_bits = 32;
 245         fields[0].out_value = value_buf;
 246         fields[0].in_value = NULL;
 247
 248         fields[1].tap = jtag_info->tap;
 249         fields[1].num_bits = 6;
 250         fields[1].out_value = &reg_addr_buf;
 251         fields[1].in_value = NULL;
 252
 253         fields[2].tap = jtag_info->tap;
 254         fields[2].num_bits = 1;
 255         fields[2].out_value = &nr_w_buf;
 256         fields[2].in_value = NULL;
 257
 258         jtag_add_dr_scan(3, fields, TAP_INVALID);
 259
 260 #ifdef _DEBUG_INSTRUCTION_EXECUTION_
 261         LOG_DEBUG("addr: 0x%x value: %8.8x", reg_addr, value);
 262 #endif
 263
 264         return ERROR_OK;
 265 }
 266
 267 int arm966e_handle_cp15_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 268 {
 269         int retval;
 270         target_t *target = get_current_target(cmd_ctx);
 271         armv4_5_common_t *armv4_5;
 272         arm7_9_common_t *arm7_9;
 273         arm9tdmi_common_t *arm9tdmi;
 274         arm966e_common_t *arm966e;
 275         arm_jtag_t *jtag_info;
 276
 277         if (arm966e_get_arch_pointers(target, &armv4_5, &arm7_9, &arm9tdmi, &arm966e) != ERROR_OK)
 278         {
 279                 command_print(cmd_ctx, "current target isn't an ARM966e target");
 280                 return ERROR_OK;
 281         }
 282
 283         jtag_info = &arm7_9->jtag_info;
 284
 285         if (target->state != TARGET_HALTED)
 286         {
 287                 command_print(cmd_ctx, "target must be stopped for \"%s\" command", cmd);
 288                 return ERROR_OK;
 289         }
 290
 291         /* one or more argument, access a single register (write if second argument is given */
 292         if (argc >= 1)
 293         {
 294                 int address = strtoul(args[0], NULL, 0);
 295
 296                 if (argc == 1)
 297                 {
 298                         u32 value;
 299                         if ((retval = arm966e_read_cp15(target, address, &value)) != ERROR_OK)
 300                         {
 301                                 command_print(cmd_ctx, "couldn't access reg %i", address);
 302                                 return ERROR_OK;
 303                         }
 304                         if ((retval = jtag_execute_queue()) != ERROR_OK)
 305                         {
 306                                 return retval;
 307                         }
 308
 309                         command_print(cmd_ctx, "%i: %8.8x", address, value);
 310                 }
 311                 else if (argc == 2)
 312                 {
 313                         u32 value = strtoul(args[1], NULL, 0);
 314                         if ((retval = arm966e_write_cp15(target, address, value)) != ERROR_OK)
 315                         {
 316                                 command_print(cmd_ctx, "couldn't access reg %i", address);
 317                                 return ERROR_OK;
 318                         }
 319                         command_print(cmd_ctx, "%i: %8.8x", address, value);
 320                 }
 321         }
 322
 323         return ERROR_OK;
 324 }
 325
 326 int arm966e_register_commands(struct command_context_s *cmd_ctx)
 327 {
 328         int retval;
 329         command_t *arm966e_cmd;
 330
 331         retval = arm9tdmi_register_commands(cmd_ctx);
 332         arm966e_cmd = register_command(cmd_ctx, NULL, "arm966e", NULL, COMMAND_ANY, "arm966e specific commands");
 333         register_command(cmd_ctx, arm966e_cmd, "cp15", arm966e_handle_cp15_command, COMMAND_EXEC, "display/modify cp15 register <num> [value]");
 334
 335         return retval;
 336 }