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   1 /***************************************************************************
   2  *   Copyright (C) 2007 by Dominic Rath                                    *
   3  *   Dominic.Rath@gmx.de                                                   *
   4  *                                                                         *
   5  *   Copyright (C) 2007,2008 Øyvind Harboe                                 *
   6  *   oyvind.harboe@zylin.com                                               *
   7  *                                                                         *
   8  *   Copyright (C) 2008 by Spencer Oliver                                  *
   9  *   spen@spen-soft.co.uk                                                  *
  10  *                                                                         *
  11  *   This program is free software; you can redistribute it and/or modify  *
  12  *   it under the terms of the GNU General Public License as published by  *
  13  *   the Free Software Foundation; either version 2 of the License, or     *
  14  *   (at your option) any later version.                                   *
  15  *                                                                         *
  16  *   This program is distributed in the hope that it will be useful,       *
  17  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  18  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  19  *   GNU General Public License for more details.                          *
  20  *                                                                         *
  21  *   You should have received a copy of the GNU General Public License     *
  22  *   along with this program; if not, write to the                         *
  23  *   Free Software Foundation, Inc.,                                       *
  24  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  25  ***************************************************************************/
  26 #ifdef HAVE_CONFIG_H
  27 #include "config.h"
  28 #endif
  29
  30 #include "replacements.h"
  31 #include "log.h"
  32 #include "target.h"
  33 #include "target_request.h"
  34 #include "binarybuffer.h"
  35 #include "command.h"
  36 #include "trace.h"
  37
  38 #include <stdlib.h>
  39 #include <string.h>
  40
  41 static command_t *target_request_cmd = NULL;
  42 static int charmsg_mode = 0;
  43
  44 static int target_asciimsg(target_t *target, u32 length)
  45 {
  46         char *msg = malloc(CEIL(length + 1, 4) * 4);
  47         debug_msg_receiver_t *c = target->dbgmsg;
  48
  49         target->type->target_request_data(target, CEIL(length, 4), (u8*)msg);
  50         msg[length] = 0;
  51
  52         LOG_DEBUG("%s", msg);
  53
  54         while (c)
  55         {
  56                 command_print(c->cmd_ctx, "%s", msg);
  57                 c = c->next;
  58         }
  59
  60         return ERROR_OK;
  61 }
  62
  63 static int target_charmsg(target_t *target, u8 msg)
  64 {
  65         LOG_USER_N("%c", msg);
  66
  67         return ERROR_OK;
  68 }
  69
  70 static int target_hexmsg(target_t *target, int size, u32 length)
  71 {
  72         u8 *data = malloc(CEIL(length * size, 4) * 4);
  73         char line[128];
  74         int line_len;
  75         debug_msg_receiver_t *c = target->dbgmsg;
  76         u32 i;
  77
  78         LOG_DEBUG("size: %i, length: %i", size, length);
  79
  80         target->type->target_request_data(target, CEIL(length * size, 4), (u8*)data);
  81
  82         line_len = 0;
  83         for (i = 0; i < length; i++)
  84         {
  85                 switch (size)
  86                 {
  87                         case 4:
  88                                 line_len += snprintf(line + line_len, 128 - line_len, "%8.8x ", le_to_h_u32(data + (4*i)));
  89                                 break;
  90                         case 2:
  91                                 line_len += snprintf(line + line_len, 128 - line_len, "%4.4x ", le_to_h_u16(data + (2*i)));
  92                                 break;
  93                         case 1:
  94                                 line_len += snprintf(line + line_len, 128 - line_len, "%2.2x ", data[i]);
  95                                 break;
  96                 }
  97
  98                 if ((i%8 == 7) || (i == length - 1))
  99                 {
 100                         LOG_DEBUG("%s", line);
 101
 102                         while (c)
 103                         {
 104                                 command_print(c->cmd_ctx, "%s", line);
 105                                 c = c->next;
 106                         }
 107                         c = target->dbgmsg;
 108                         line_len = 0;
 109                 }
 110         }
 111
 112         free(data);
 113
 114         return ERROR_OK;
 115 }
 116
 117 /* handle requests from the target received by a target specific
 118  * side-band channel (e.g. ARM7/9 DCC)
 119  */
 120 int target_request(target_t *target, u32 request)
 121 {
 122         target_req_cmd_t target_req_cmd = request & 0xff;
 123
 124         if ( charmsg_mode ) {
 125                 target_charmsg(target, target_req_cmd );
 126                 return ERROR_OK;
 127         }
 128         switch (target_req_cmd)
 129         {
 130                 case TARGET_REQ_TRACEMSG:
 131                         trace_point(target, (request & 0xffffff00) >> 8);
 132                         break;
 133                 case TARGET_REQ_DEBUGMSG:
 134                         if (((request & 0xff00) >> 8) == 0)
 135                         {
 136                                 target_asciimsg(target, (request & 0xffff0000) >> 16);
 137                         }
 138                         else
 139                         {
 140                                 target_hexmsg(target, (request & 0xff00) >> 8, (request & 0xffff0000) >> 16);
 141                         }
 142                         break;
 143                 case TARGET_REQ_DEBUGCHAR:
 144                         target_charmsg(target, (request & 0x00ff0000) >> 16);
 145                         break;
 146 /*              case TARGET_REQ_SEMIHOSTING:
 147  *                      break;
 148  */
 149                 default:
 150                         LOG_ERROR("unknown target request: %2.2x", target_req_cmd);
 151                         break;
 152         }
 153
 154         return ERROR_OK;
 155 }
 156
 157 static int add_debug_msg_receiver(struct command_context_s *cmd_ctx, target_t *target)
 158 {
 159         debug_msg_receiver_t **p = &target->dbgmsg;
 160
 161         if (target == NULL)
 162                 return ERROR_INVALID_ARGUMENTS;
 163
 164         /* see if there's already a list */
 165         if (*p)
 166         {
 167                 /* find end of linked list */
 168                 p = &target->dbgmsg;
 169                 while ((*p)->next)
 170                         p = &((*p)->next);
 171                 p = &((*p)->next);
 172         }
 173
 174         /* add new debug message receiver */
 175         (*p) = malloc(sizeof(debug_msg_receiver_t));
 176         (*p)->cmd_ctx = cmd_ctx;
 177         (*p)->next = NULL;
 178
 179         /* enable callback */
 180         target->dbg_msg_enabled = 1;
 181
 182         return ERROR_OK;
 183 }
 184
 185 static debug_msg_receiver_t* find_debug_msg_receiver(struct command_context_s *cmd_ctx, target_t *target)
 186 {
 187         int do_all_targets = 0;
 188         debug_msg_receiver_t **p = &target->dbgmsg;
 189
 190         /* if no target has been specified search all of them */
 191         if (target == NULL)
 192         {
 193                 /* if no targets haven been specified */
 194                 if (all_targets == NULL)
 195                         return NULL;
 196
 197                 target = all_targets;
 198                 do_all_targets = 1;
 199         }
 200
 201         do
 202         {
 203                 while (*p)
 204                 {
 205                         if ((*p)->cmd_ctx == cmd_ctx)
 206                         {
 207                                 return *p;
 208                         }
 209                         p = &((*p)->next);
 210                 }
 211
 212                 target = target->next;
 213         } while (target && do_all_targets);
 214
 215         return NULL;
 216 }
 217
 218 int delete_debug_msg_receiver(struct command_context_s *cmd_ctx, target_t *target)
 219 {
 220         debug_msg_receiver_t **p;
 221         debug_msg_receiver_t *c;
 222         int do_all_targets = 0;
 223
 224         /* if no target has been specified search all of them */
 225         if (target == NULL)
 226         {
 227                 /* if no targets haven been specified */
 228                 if (all_targets == NULL)
 229                         return ERROR_OK;
 230
 231                 target = all_targets;
 232                 do_all_targets = 1;
 233         }
 234
 235         do
 236         {
 237                 p = &target->dbgmsg;
 238                 c = *p;
 239                 while (c)
 240                 {
 241                         debug_msg_receiver_t *next = c->next;
 242                         if (c->cmd_ctx == cmd_ctx)
 243                         {
 244                                 *p = next;
 245                                 free(c);
 246                                 if (*p == NULL)
 247                                 {
 248                                         /* disable callback */
 249                                         target->dbg_msg_enabled = 0;
 250                                 }
 251                                 return ERROR_OK;
 252                         }
 253                         else
 254                                 p = &(c->next);
 255                         c = next;
 256                 }
 257
 258                 target = target->next;
 259         } while (target && do_all_targets);
 260
 261         return ERROR_OK;
 262 }
 263
 264 static int handle_target_request_debugmsgs_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 265 {
 266         target_t *target = get_current_target(cmd_ctx);
 267
 268         int receiving = 0;
 269
 270         /* see if reciever is already registered */
 271         if (find_debug_msg_receiver(cmd_ctx, target) != NULL)
 272                 receiving = 1;
 273
 274         if (argc > 0)
 275         {
 276                 if (!strcmp(args[0], "enable") || !strcmp(args[0], "charmsg"))
 277                 {
 278                         /* don't register if this command context is already receiving */
 279                         if (!receiving)
 280                         {
 281                                 receiving = 1;
 282                                 add_debug_msg_receiver(cmd_ctx, target);
 283                         }
 284                         charmsg_mode = !strcmp(args[0], "charmsg");
 285                 }
 286                 else if (!strcmp(args[0], "disable"))
 287                 {
 288                         /* no need to delete a receiver if none is registered */
 289                         if (receiving)
 290                         {
 291                                 receiving = 0;
 292                                 delete_debug_msg_receiver(cmd_ctx, target);
 293                         }
 294                 }
 295                 else
 296                 {
 297                         command_print(cmd_ctx, "usage: target_request debugmsgs ['enable'|'disable'|'charmsg']");
 298                 }
 299         }
 300
 301         command_print(cmd_ctx, "receiving debug messages from current target %s",
 302                       (receiving) ? (charmsg_mode?"charmsg":"enabled") : "disabled" );
 303         return ERROR_OK;
 304 }
 305
 306 int target_request_register_commands(struct command_context_s *cmd_ctx)
 307 {
 308         target_request_cmd =
 309                 register_command(cmd_ctx, NULL, "target_request", NULL, COMMAND_ANY, "target_request commands");
 310
 311         register_command(cmd_ctx, target_request_cmd, "debugmsgs", handle_target_request_debugmsgs_command,
 312                 COMMAND_EXEC, "enable/disable reception of debug messages from target");
 313
 314         return ERROR_OK;
 315 }