src/target/arm966e.c

   1 /***************************************************************************
   2  *   Copyright (C) 2005 by Dominic Rath                                    *
   3  *   Dominic.Rath@gmx.de                                                   *
   4  *                                                                         *
   5  *   This program is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation; either version 2 of the License, or     *
   8  *   (at your option) any later version.                                   *
   9  *                                                                         *
  10  *   This program is distributed in the hope that it will be useful,       *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15  *   You should have received a copy of the GNU General Public License     *
  16  *   along with this program; if not, write to the                         *
  17  *   Free Software Foundation, Inc.,                                       *
  18  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  19  ***************************************************************************/
  20 #ifdef HAVE_CONFIG_H
  21 #include "config.h"
  22 #endif
  23
  24 #include "arm966e.h"
  25
  26 #include "arm7_9_common.h"
  27 #include "register.h"
  28 #include "target.h"
  29 #include "armv4_5.h"
  30 #include "embeddedice.h"
  31 #include "log.h"
  32 #include "jtag.h"
  33 #include "arm_jtag.h"
  34
  35 #include <stdlib.h>
  36 #include <string.h>
  37
  38 #if 0
  39 #define _DEBUG_INSTRUCTION_EXECUTION_
  40 #endif
  41
  42 /* cli handling */
  43 int arm966e_register_commands(struct command_context_s *cmd_ctx);
  44
  45 /* forward declarations */
  46 int arm966e_target_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc, struct target_s *target);
  47 int arm966e_init_target(struct command_context_s *cmd_ctx, struct target_s *target);
  48 int arm966e_quit(void);
  49
  50 target_type_t arm966e_target =
  51 {
  52         .name = "arm966e",
  53
  54         .poll = arm7_9_poll,
  55         .arch_state = armv4_5_arch_state,
  56
  57         .halt = arm7_9_halt,
  58         .resume = arm7_9_resume,
  59         .step = arm7_9_step,
  60
  61         .assert_reset = arm7_9_assert_reset,
  62         .deassert_reset = arm7_9_deassert_reset,
  63         .soft_reset_halt = arm7_9_soft_reset_halt,
  64         .prepare_reset_halt = arm7_9_prepare_reset_halt,
  65
  66         .get_gdb_reg_list = armv4_5_get_gdb_reg_list,
  67
  68         .read_memory = arm7_9_read_memory,
  69         .write_memory = arm7_9_write_memory,
  70         .bulk_write_memory = arm7_9_bulk_write_memory,
  71
  72         .run_algorithm = armv4_5_run_algorithm,
  73
  74         .add_breakpoint = arm7_9_add_breakpoint,
  75         .remove_breakpoint = arm7_9_remove_breakpoint,
  76         .add_watchpoint = arm7_9_add_watchpoint,
  77         .remove_watchpoint = arm7_9_remove_watchpoint,
  78
  79         .register_commands = arm966e_register_commands,
  80         .target_command = arm966e_target_command,
  81         .init_target = arm966e_init_target,
  82         .quit = arm966e_quit,
  83 };
  84
  85 int arm966e_init_target(struct command_context_s *cmd_ctx, struct target_s *target)
  86 {
  87         arm9tdmi_init_target(cmd_ctx, target);
  88
  89         return ERROR_OK;
  90 }
  91
  92 int arm966e_quit(void)
  93 {
  94
  95         return ERROR_OK;
  96 }
  97
  98 int arm966e_init_arch_info(target_t *target, arm966e_common_t *arm966e, int chain_pos, char *variant)
  99 {
 100         arm9tdmi_common_t *arm9tdmi = &arm966e->arm9tdmi_common;
 101         arm7_9_common_t *arm7_9 = &arm9tdmi->arm7_9_common;
 102
 103         arm9tdmi_init_arch_info(target, arm9tdmi, chain_pos, variant);
 104
 105         arm9tdmi->arch_info = arm966e;
 106         arm966e->common_magic = ARM966E_COMMON_MAGIC;
 107
 108         /* The ARM966E-S implements the ARMv5TE architecture which
 109          * has the BKPT instruction, so we don't have to use a watchpoint comparator
 110          */
 111         arm7_9->arm_bkpt = ARMV5_BKPT(0x0);
 112         arm7_9->thumb_bkpt = ARMV5_T_BKPT(0x0) & 0xffff;
 113
 114         arm7_9->sw_bkpts_use_wp = 0;
 115         arm7_9->sw_bkpts_enabled = 1;
 116
 117         return ERROR_OK;
 118 }
 119
 120 int arm966e_target_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc, struct target_s *target)
 121 {
 122         int chain_pos;
 123         char *variant = NULL;
 124         arm966e_common_t *arm966e = malloc(sizeof(arm966e_common_t));
 125
 126         if (argc < 4)
 127         {
 128                 ERROR("'target arm966e' requires at least one additional argument");
 129                 exit(-1);
 130         }
 131
 132         chain_pos = strtoul(args[3], NULL, 0);
 133
 134         if (argc >= 5)
 135                 variant = args[4];
 136
 137         DEBUG("chain_pos: %i, variant: %s", chain_pos, variant);
 138
 139         arm966e_init_arch_info(target, arm966e, chain_pos, variant);
 140
 141         return ERROR_OK;
 142 }
 143
 144 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)
 145 {
 146         armv4_5_common_t *armv4_5 = target->arch_info;
 147         arm7_9_common_t *arm7_9;
 148         arm9tdmi_common_t *arm9tdmi;
 149         arm966e_common_t *arm966e;
 150
 151         if (armv4_5->common_magic != ARMV4_5_COMMON_MAGIC)
 152         {
 153                 return -1;
 154         }
 155
 156         arm7_9 = armv4_5->arch_info;
 157         if (arm7_9->common_magic != ARM7_9_COMMON_MAGIC)
 158         {
 159                 return -1;
 160         }
 161
 162         arm9tdmi = arm7_9->arch_info;
 163         if (arm9tdmi->common_magic != ARM9TDMI_COMMON_MAGIC)
 164         {
 165                 return -1;
 166         }
 167
 168         arm966e = arm9tdmi->arch_info;
 169         if (arm966e->common_magic != ARM966E_COMMON_MAGIC)
 170         {
 171                 return -1;
 172         }
 173
 174         *armv4_5_p = armv4_5;
 175         *arm7_9_p = arm7_9;
 176         *arm9tdmi_p = arm9tdmi;
 177         *arm966e_p = arm966e;
 178
 179         return ERROR_OK;
 180 }
 181
 182 int arm966e_read_cp15(target_t *target, int reg_addr, u32 *value)
 183 {
 184         armv4_5_common_t *armv4_5 = target->arch_info;
 185         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 186         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 187         scan_field_t fields[3];
 188         u8 reg_addr_buf = reg_addr & 0x3f;
 189         u8 nr_w_buf = 0;
 190
 191         jtag_add_end_state(TAP_RTI);
 192         arm_jtag_scann(jtag_info, 0xf);
 193         arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, NULL);
 194
 195         fields[0].device = jtag_info->chain_pos;
 196         fields[0].num_bits = 32;
 197         fields[0].out_value = NULL;
 198         fields[0].out_mask = NULL;
 199         fields[0].in_value = NULL;
 200         fields[0].in_check_value = NULL;
 201         fields[0].in_check_mask = NULL;
 202         fields[0].in_handler = NULL;
 203         fields[0].in_handler_priv = NULL;
 204
 205         fields[1].device = jtag_info->chain_pos;
 206         fields[1].num_bits = 6;
 207         fields[1].out_value = &reg_addr_buf;
 208         fields[1].out_mask = NULL;
 209         fields[1].in_value = NULL;
 210         fields[1].in_check_value = NULL;
 211         fields[1].in_check_mask = NULL;
 212         fields[1].in_handler = NULL;
 213         fields[1].in_handler_priv = NULL;
 214
 215         fields[2].device = jtag_info->chain_pos;
 216         fields[2].num_bits = 1;
 217         fields[2].out_value = &nr_w_buf;
 218         fields[2].out_mask = NULL;
 219         fields[2].in_value = NULL;
 220         fields[2].in_check_value = NULL;
 221         fields[2].in_check_mask = NULL;
 222         fields[2].in_handler = NULL;
 223         fields[2].in_handler_priv = NULL;
 224
 225         jtag_add_dr_scan(3, fields, -1, NULL);
 226
 227         fields[0].in_value = (u8*)value;
 228
 229         jtag_add_dr_scan(3, fields, -1, NULL);
 230
 231         return ERROR_OK;
 232 }
 233
 234 int arm966e_write_cp15(target_t *target, int reg_addr, u32 value)
 235 {
 236         armv4_5_common_t *armv4_5 = target->arch_info;
 237         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 238         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 239         scan_field_t fields[3];
 240         u8 reg_addr_buf = reg_addr & 0x3f;
 241         u8 nr_w_buf = 1;
 242
 243         jtag_add_end_state(TAP_RTI);
 244         arm_jtag_scann(jtag_info, 0xf);
 245         arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, NULL);
 246
 247         fields[0].device = jtag_info->chain_pos;
 248         fields[0].num_bits = 32;
 249         fields[0].out_value = (u8*)&value;
 250         fields[0].out_mask = NULL;
 251         fields[0].in_value = NULL;
 252         fields[0].in_check_value = NULL;
 253         fields[0].in_check_mask = NULL;
 254         fields[0].in_handler = NULL;
 255         fields[0].in_handler_priv = NULL;
 256
 257         fields[1].device = jtag_info->chain_pos;
 258         fields[1].num_bits = 6;
 259         fields[1].out_value = &reg_addr_buf;
 260         fields[1].out_mask = NULL;
 261         fields[1].in_value = NULL;
 262         fields[1].in_check_value = NULL;
 263         fields[1].in_check_mask = NULL;
 264         fields[1].in_handler = NULL;
 265         fields[1].in_handler_priv = NULL;
 266
 267         fields[2].device = jtag_info->chain_pos;
 268         fields[2].num_bits = 1;
 269         fields[2].out_value = &nr_w_buf;
 270         fields[2].out_mask = NULL;
 271         fields[2].in_value = NULL;
 272         fields[2].in_check_value = NULL;
 273         fields[2].in_check_mask = NULL;
 274         fields[2].in_handler = NULL;
 275         fields[2].in_handler_priv = NULL;
 276
 277         jtag_add_dr_scan(3, fields, -1, NULL);
 278
 279         return ERROR_OK;
 280 }
 281
 282 int arm966e_handle_cp15_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 283 {
 284         int retval;
 285         target_t *target = get_current_target(cmd_ctx);
 286         armv4_5_common_t *armv4_5;
 287         arm7_9_common_t *arm7_9;
 288         arm9tdmi_common_t *arm9tdmi;
 289         arm966e_common_t *arm966e;
 290         arm_jtag_t *jtag_info;
 291
 292         if (arm966e_get_arch_pointers(target, &armv4_5, &arm7_9, &arm9tdmi, &arm966e) != ERROR_OK)
 293         {
 294                 command_print(cmd_ctx, "current target isn't an ARM966e target");
 295                 return ERROR_OK;
 296         }
 297
 298         jtag_info = &arm7_9->jtag_info;
 299
 300         if (target->state != TARGET_HALTED)
 301         {
 302                 command_print(cmd_ctx, "target must be stopped for \"%s\" command", cmd);
 303                 return ERROR_OK;
 304         }
 305
 306         /* one or more argument, access a single register (write if second argument is given */
 307         if (argc >= 1)
 308         {
 309                 int address = strtoul(args[0], NULL, 0);
 310
 311                 if (argc == 1)
 312                 {
 313                         u32 value;
 314                         if ((retval = arm966e_read_cp15(target, address, &value)) != ERROR_OK)
 315                         {
 316                                 command_print(cmd_ctx, "couldn't access reg %i", address);
 317                                 return ERROR_OK;
 318                         }
 319                         jtag_execute_queue();
 320
 321                         command_print(cmd_ctx, "%i: %8.8x", address, value);
 322                 }
 323                 else if (argc == 2)
 324                 {
 325                         u32 value = strtoul(args[1], NULL, 0);
 326                         if ((retval = arm966e_write_cp15(target, address, value)) != ERROR_OK)
 327                         {
 328                                 command_print(cmd_ctx, "couldn't access reg %i", address);
 329                                 return ERROR_OK;
 330                         }
 331                         command_print(cmd_ctx, "%i: %8.8x", address, value);
 332                 }
 333         }
 334
 335         return ERROR_OK;
 336 }
 337
 338 int arm966e_register_commands(struct command_context_s *cmd_ctx)
 339 {
 340         int retval;
 341         command_t *arm966e_cmd;
 342
 343         retval = arm9tdmi_register_commands(cmd_ctx);
 344         arm966e_cmd = register_command(cmd_ctx, NULL, "arm966e", NULL, COMMAND_ANY, "arm966e specific commands");
 345         register_command(cmd_ctx, arm966e_cmd, "cp15", arm966e_handle_cp15_command, COMMAND_EXEC, "display/modify cp15 register <num> [value]");
 346
 347         return ERROR_OK;
 348 }