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_create(struct target_s *target, Jim_Interp *interp);
  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         .target_request_data = arm7_9_target_request_data,
  58
  59         .halt = arm7_9_halt,
  60         .resume = arm7_9_resume,
  61         .step = arm7_9_step,
  62
  63         .assert_reset = arm7_9_assert_reset,
  64         .deassert_reset = arm7_9_deassert_reset,
  65         .soft_reset_halt = arm7_9_soft_reset_halt,
  66
  67         .get_gdb_reg_list = armv4_5_get_gdb_reg_list,
  68
  69         .read_memory = arm7_9_read_memory,
  70         .write_memory = arm7_9_write_memory,
  71         .bulk_write_memory = arm7_9_bulk_write_memory,
  72         .checksum_memory = arm7_9_checksum_memory,
  73         .blank_check_memory = arm7_9_blank_check_memory,
  74
  75         .run_algorithm = armv4_5_run_algorithm,
  76
  77         .add_breakpoint = arm7_9_add_breakpoint,
  78         .remove_breakpoint = arm7_9_remove_breakpoint,
  79         .add_watchpoint = arm7_9_add_watchpoint,
  80         .remove_watchpoint = arm7_9_remove_watchpoint,
  81
  82         .register_commands = arm966e_register_commands,
  83         .target_create = arm966e_target_create,
  84         .init_target = arm966e_init_target,
  85         .examine = arm9tdmi_examine,
  86         .quit = arm966e_quit,
  87 };
  88
  89 int arm966e_init_target(struct command_context_s *cmd_ctx, struct target_s *target)
  90 {
  91         arm9tdmi_init_target(cmd_ctx, target);
  92
  93         return ERROR_OK;
  94 }
  95
  96 int arm966e_quit(void)
  97 {
  98
  99         return ERROR_OK;
 100 }
 101
 102 int arm966e_init_arch_info(target_t *target, arm966e_common_t *arm966e, int chain_pos, const char *variant)
 103 {
 104         arm9tdmi_common_t *arm9tdmi = &arm966e->arm9tdmi_common;
 105         arm7_9_common_t *arm7_9 = &arm9tdmi->arm7_9_common;
 106
 107         arm9tdmi_init_arch_info(target, arm9tdmi, chain_pos, variant);
 108
 109         arm9tdmi->arch_info = arm966e;
 110         arm966e->common_magic = ARM966E_COMMON_MAGIC;
 111
 112         /* The ARM966E-S implements the ARMv5TE architecture which
 113          * has the BKPT instruction, so we don't have to use a watchpoint comparator
 114          */
 115         arm7_9->arm_bkpt = ARMV5_BKPT(0x0);
 116         arm7_9->thumb_bkpt = ARMV5_T_BKPT(0x0) & 0xffff;
 117
 118         return ERROR_OK;
 119 }
 120
 121 int arm966e_target_create( struct target_s *target, Jim_Interp *interp )
 122 {
 123         arm966e_common_t *arm966e = calloc(1,sizeof(arm966e_common_t));
 124
 125         arm966e_init_arch_info(target, arm966e, target->chain_position, target->variant);
 126
 127         return ERROR_OK;
 128 }
 129
 130 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)
 131 {
 132         armv4_5_common_t *armv4_5 = target->arch_info;
 133         arm7_9_common_t *arm7_9;
 134         arm9tdmi_common_t *arm9tdmi;
 135         arm966e_common_t *arm966e;
 136
 137         if (armv4_5->common_magic != ARMV4_5_COMMON_MAGIC)
 138         {
 139                 return -1;
 140         }
 141
 142         arm7_9 = armv4_5->arch_info;
 143         if (arm7_9->common_magic != ARM7_9_COMMON_MAGIC)
 144         {
 145                 return -1;
 146         }
 147
 148         arm9tdmi = arm7_9->arch_info;
 149         if (arm9tdmi->common_magic != ARM9TDMI_COMMON_MAGIC)
 150         {
 151                 return -1;
 152         }
 153
 154         arm966e = arm9tdmi->arch_info;
 155         if (arm966e->common_magic != ARM966E_COMMON_MAGIC)
 156         {
 157                 return -1;
 158         }
 159
 160         *armv4_5_p = armv4_5;
 161         *arm7_9_p = arm7_9;
 162         *arm9tdmi_p = arm9tdmi;
 163         *arm966e_p = arm966e;
 164
 165         return ERROR_OK;
 166 }
 167
 168 int arm966e_read_cp15(target_t *target, int reg_addr, u32 *value)
 169 {
 170         armv4_5_common_t *armv4_5 = target->arch_info;
 171         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 172         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 173         scan_field_t fields[3];
 174         u8 reg_addr_buf = reg_addr & 0x3f;
 175         u8 nr_w_buf = 0;
 176
 177         jtag_add_end_state(TAP_RTI);
 178         arm_jtag_scann(jtag_info, 0xf);
 179         arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, NULL);
 180
 181         fields[0].device = jtag_info->chain_pos;
 182         fields[0].num_bits = 32;
 183         fields[0].out_value = NULL;
 184         fields[0].out_mask = NULL;
 185         fields[0].in_value = NULL;
 186         fields[0].in_check_value = NULL;
 187         fields[0].in_check_mask = NULL;
 188         fields[0].in_handler = NULL;
 189         fields[0].in_handler_priv = NULL;
 190
 191         fields[1].device = jtag_info->chain_pos;
 192         fields[1].num_bits = 6;
 193         fields[1].out_value = &reg_addr_buf;
 194         fields[1].out_mask = NULL;
 195         fields[1].in_value = NULL;
 196         fields[1].in_check_value = NULL;
 197         fields[1].in_check_mask = NULL;
 198         fields[1].in_handler = NULL;
 199         fields[1].in_handler_priv = NULL;
 200
 201         fields[2].device = jtag_info->chain_pos;
 202         fields[2].num_bits = 1;
 203         fields[2].out_value = &nr_w_buf;
 204         fields[2].out_mask = NULL;
 205         fields[2].in_value = NULL;
 206         fields[2].in_check_value = NULL;
 207         fields[2].in_check_mask = NULL;
 208         fields[2].in_handler = NULL;
 209         fields[2].in_handler_priv = NULL;
 210
 211         jtag_add_dr_scan(3, fields, -1);
 212
 213         fields[0].in_handler_priv = value;
 214         fields[0].in_handler = arm_jtag_buf_to_u32;
 215
 216         jtag_add_dr_scan(3, fields, -1);
 217
 218 #ifdef _DEBUG_INSTRUCTION_EXECUTION_
 219         jtag_execute_queue();
 220         LOG_DEBUG("addr: 0x%x value: %8.8x", reg_addr, *value);
 221 #endif
 222
 223         return ERROR_OK;
 224 }
 225
 226 int arm966e_write_cp15(target_t *target, int reg_addr, u32 value)
 227 {
 228         armv4_5_common_t *armv4_5 = target->arch_info;
 229         arm7_9_common_t *arm7_9 = armv4_5->arch_info;
 230         arm_jtag_t *jtag_info = &arm7_9->jtag_info;
 231         scan_field_t fields[3];
 232         u8 reg_addr_buf = reg_addr & 0x3f;
 233         u8 nr_w_buf = 1;
 234         u8 value_buf[4];
 235
 236         buf_set_u32(value_buf, 0, 32, value);
 237
 238         jtag_add_end_state(TAP_RTI);
 239         arm_jtag_scann(jtag_info, 0xf);
 240         arm_jtag_set_instr(jtag_info, jtag_info->intest_instr, NULL);
 241
 242         fields[0].device = jtag_info->chain_pos;
 243         fields[0].num_bits = 32;
 244         fields[0].out_value = value_buf;
 245         fields[0].out_mask = NULL;
 246         fields[0].in_value = NULL;
 247         fields[0].in_check_value = NULL;
 248         fields[0].in_check_mask = NULL;
 249         fields[0].in_handler = NULL;
 250         fields[0].in_handler_priv = NULL;
 251
 252         fields[1].device = jtag_info->chain_pos;
 253         fields[1].num_bits = 6;
 254         fields[1].out_value = &reg_addr_buf;
 255         fields[1].out_mask = NULL;
 256         fields[1].in_value = NULL;
 257         fields[1].in_check_value = NULL;
 258         fields[1].in_check_mask = NULL;
 259         fields[1].in_handler = NULL;
 260         fields[1].in_handler_priv = NULL;
 261
 262         fields[2].device = jtag_info->chain_pos;
 263         fields[2].num_bits = 1;
 264         fields[2].out_value = &nr_w_buf;
 265         fields[2].out_mask = NULL;
 266         fields[2].in_value = NULL;
 267         fields[2].in_check_value = NULL;
 268         fields[2].in_check_mask = NULL;
 269         fields[2].in_handler = NULL;
 270         fields[2].in_handler_priv = NULL;
 271
 272         jtag_add_dr_scan(3, fields, -1);
 273
 274 #ifdef _DEBUG_INSTRUCTION_EXECUTION_
 275         LOG_DEBUG("addr: 0x%x value: %8.8x", reg_addr, value);
 276 #endif
 277
 278         return ERROR_OK;
 279 }
 280
 281 int arm966e_handle_cp15_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 282 {
 283         int retval;
 284         target_t *target = get_current_target(cmd_ctx);
 285         armv4_5_common_t *armv4_5;
 286         arm7_9_common_t *arm7_9;
 287         arm9tdmi_common_t *arm9tdmi;
 288         arm966e_common_t *arm966e;
 289         arm_jtag_t *jtag_info;
 290
 291         if (arm966e_get_arch_pointers(target, &armv4_5, &arm7_9, &arm9tdmi, &arm966e) != ERROR_OK)
 292         {
 293                 command_print(cmd_ctx, "current target isn't an ARM966e target");
 294                 return ERROR_OK;
 295         }
 296
 297         jtag_info = &arm7_9->jtag_info;
 298
 299         if (target->state != TARGET_HALTED)
 300         {
 301                 command_print(cmd_ctx, "target must be stopped for \"%s\" command", cmd);
 302                 return ERROR_OK;
 303         }
 304
 305         /* one or more argument, access a single register (write if second argument is given */
 306         if (argc >= 1)
 307         {
 308                 int address = strtoul(args[0], NULL, 0);
 309
 310                 if (argc == 1)
 311                 {
 312                         u32 value;
 313                         if ((retval = arm966e_read_cp15(target, address, &value)) != ERROR_OK)
 314                         {
 315                                 command_print(cmd_ctx, "couldn't access reg %i", address);
 316                                 return ERROR_OK;
 317                         }
 318                         jtag_execute_queue();
 319
 320                         command_print(cmd_ctx, "%i: %8.8x", address, value);
 321                 }
 322                 else if (argc == 2)
 323                 {
 324                         u32 value = strtoul(args[1], NULL, 0);
 325                         if ((retval = arm966e_write_cp15(target, address, value)) != ERROR_OK)
 326                         {
 327                                 command_print(cmd_ctx, "couldn't access reg %i", address);
 328                                 return ERROR_OK;
 329                         }
 330                         command_print(cmd_ctx, "%i: %8.8x", address, value);
 331                 }
 332         }
 333
 334         return ERROR_OK;
 335 }
 336
 337 int arm966e_register_commands(struct command_context_s *cmd_ctx)
 338 {
 339         int retval;
 340         command_t *arm966e_cmd;
 341
 342         retval = arm9tdmi_register_commands(cmd_ctx);
 343         arm966e_cmd = register_command(cmd_ctx, NULL, "arm966e", NULL, COMMAND_ANY, "arm966e specific commands");
 344         register_command(cmd_ctx, arm966e_cmd, "cp15", arm966e_handle_cp15_command, COMMAND_EXEC, "display/modify cp15 register <num> [value]");
 345
 346         return ERROR_OK;
 347 }
 348
 349 /*
 350  * Local Variables: ***
 351  * c-basic-offset: 4 ***
 352  * tab-width: 4 ***
 353  * End: ***
 354  */