src/target/target_request.c

   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 "target_request.h"
  31 #include "target_type.h"
  32 #include "binarybuffer.h"
  33 #include "trace.h"
  34 #include "log.h"
  35
  36
  37 static command_t *target_request_cmd = NULL;
  38 static int charmsg_mode = 0;
  39
  40 static int target_asciimsg(target_t *target, uint32_t length)
  41 {
  42         char *msg = malloc(CEIL(length + 1, 4) * 4);
  43         debug_msg_receiver_t *c = target->dbgmsg;
  44
  45         target->type->target_request_data(target, CEIL(length, 4), (uint8_t*)msg);
  46         msg[length] = 0;
  47
  48         LOG_DEBUG("%s", msg);
  49
  50         while (c)
  51         {
  52                 command_print(c->cmd_ctx, "%s", msg);
  53                 c = c->next;
  54         }
  55
  56         return ERROR_OK;
  57 }
  58
  59 static int target_charmsg(target_t *target, uint8_t msg)
  60 {
  61         LOG_USER_N("%c", msg);
  62
  63         return ERROR_OK;
  64 }
  65
  66 static int target_hexmsg(target_t *target, int size, uint32_t length)
  67 {
  68         uint8_t *data = malloc(CEIL(length * size, 4) * 4);
  69         char line[128];
  70         int line_len;
  71         debug_msg_receiver_t *c = target->dbgmsg;
  72         uint32_t i;
  73
  74         LOG_DEBUG("size: %i, length: %i", (int)size, (int)length);
  75
  76         target->type->target_request_data(target, CEIL(length * size, 4), (uint8_t*)data);
  77
  78         line_len = 0;
  79         for (i = 0; i < length; i++)
  80         {
  81                 switch (size)
  82                 {
  83                         case 4:
  84                                 line_len += snprintf(line + line_len, 128 - line_len, "%8.8" PRIx32 " ", le_to_h_u32(data + (4*i)));
  85                                 break;
  86                         case 2:
  87                                 line_len += snprintf(line + line_len, 128 - line_len, "%4.4x ", le_to_h_u16(data + (2*i)));
  88                                 break;
  89                         case 1:
  90                                 line_len += snprintf(line + line_len, 128 - line_len, "%2.2x ", data[i]);
  91                                 break;
  92                 }
  93
  94                 if ((i%8 == 7) || (i == length - 1))
  95                 {
  96                         LOG_DEBUG("%s", line);
  97
  98                         while (c)
  99                         {
 100                                 command_print(c->cmd_ctx, "%s", line);
 101                                 c = c->next;
 102                         }
 103                         c = target->dbgmsg;
 104                         line_len = 0;
 105                 }
 106         }
 107
 108         free(data);
 109
 110         return ERROR_OK;
 111 }
 112
 113 /* handle requests from the target received by a target specific
 114  * side-band channel (e.g. ARM7/9 DCC)
 115  */
 116 int target_request(target_t *target, uint32_t request)
 117 {
 118         target_req_cmd_t target_req_cmd = request & 0xff;
 119
 120         if (charmsg_mode) {
 121                 target_charmsg(target, target_req_cmd);
 122                 return ERROR_OK;
 123         }
 124         switch (target_req_cmd)
 125         {
 126                 case TARGET_REQ_TRACEMSG:
 127                         trace_point(target, (request & 0xffffff00) >> 8);
 128                         break;
 129                 case TARGET_REQ_DEBUGMSG:
 130                         if (((request & 0xff00) >> 8) == 0)
 131                         {
 132                                 target_asciimsg(target, (request & 0xffff0000) >> 16);
 133                         }
 134                         else
 135                         {
 136                                 target_hexmsg(target, (request & 0xff00) >> 8, (request & 0xffff0000) >> 16);
 137                         }
 138                         break;
 139                 case TARGET_REQ_DEBUGCHAR:
 140                         target_charmsg(target, (request & 0x00ff0000) >> 16);
 141                         break;
 142 /*              case TARGET_REQ_SEMIHOSTING:
 143  *                      break;
 144  */
 145                 default:
 146                         LOG_ERROR("unknown target request: %2.2x", target_req_cmd);
 147                         break;
 148         }
 149
 150         return ERROR_OK;
 151 }
 152
 153 static int add_debug_msg_receiver(struct command_context_s *cmd_ctx, target_t *target)
 154 {
 155         debug_msg_receiver_t **p = &target->dbgmsg;
 156
 157         if (target == NULL)
 158                 return ERROR_INVALID_ARGUMENTS;
 159
 160         /* see if there's already a list */
 161         if (*p)
 162         {
 163                 /* find end of linked list */
 164                 p = &target->dbgmsg;
 165                 while ((*p)->next)
 166                         p = &((*p)->next);
 167                 p = &((*p)->next);
 168         }
 169
 170         /* add new debug message receiver */
 171         (*p) = malloc(sizeof(debug_msg_receiver_t));
 172         (*p)->cmd_ctx = cmd_ctx;
 173         (*p)->next = NULL;
 174
 175         /* enable callback */
 176         target->dbg_msg_enabled = 1;
 177
 178         return ERROR_OK;
 179 }
 180
 181 static debug_msg_receiver_t* find_debug_msg_receiver(struct command_context_s *cmd_ctx, target_t *target)
 182 {
 183         int do_all_targets = 0;
 184         debug_msg_receiver_t **p = &target->dbgmsg;
 185
 186         /* if no target has been specified search all of them */
 187         if (target == NULL)
 188         {
 189                 /* if no targets haven been specified */
 190                 if (all_targets == NULL)
 191                         return NULL;
 192
 193                 target = all_targets;
 194                 do_all_targets = 1;
 195         }
 196
 197         do
 198         {
 199                 while (*p)
 200                 {
 201                         if ((*p)->cmd_ctx == cmd_ctx)
 202                         {
 203                                 return *p;
 204                         }
 205                         p = &((*p)->next);
 206                 }
 207
 208                 target = target->next;
 209         } while (target && do_all_targets);
 210
 211         return NULL;
 212 }
 213
 214 int delete_debug_msg_receiver(struct command_context_s *cmd_ctx, target_t *target)
 215 {
 216         debug_msg_receiver_t **p;
 217         debug_msg_receiver_t *c;
 218         int do_all_targets = 0;
 219
 220         /* if no target has been specified search all of them */
 221         if (target == NULL)
 222         {
 223                 /* if no targets haven been specified */
 224                 if (all_targets == NULL)
 225                         return ERROR_OK;
 226
 227                 target = all_targets;
 228                 do_all_targets = 1;
 229         }
 230
 231         do
 232         {
 233                 p = &target->dbgmsg;
 234                 c = *p;
 235                 while (c)
 236                 {
 237                         debug_msg_receiver_t *next = c->next;
 238                         if (c->cmd_ctx == cmd_ctx)
 239                         {
 240                                 *p = next;
 241                                 free(c);
 242                                 if (*p == NULL)
 243                                 {
 244                                         /* disable callback */
 245                                         target->dbg_msg_enabled = 0;
 246                                 }
 247                                 return ERROR_OK;
 248                         }
 249                         else
 250                                 p = &(c->next);
 251                         c = next;
 252                 }
 253
 254                 target = target->next;
 255         } while (target && do_all_targets);
 256
 257         return ERROR_OK;
 258 }
 259
 260 static int handle_target_request_debugmsgs_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 261 {
 262         target_t *target = get_current_target(cmd_ctx);
 263
 264         int receiving = 0;
 265
 266         /* see if reciever is already registered */
 267         if (find_debug_msg_receiver(cmd_ctx, target) != NULL)
 268                 receiving = 1;
 269
 270         if (argc > 0)
 271         {
 272                 if (!strcmp(args[0], "enable") || !strcmp(args[0], "charmsg"))
 273                 {
 274                         /* don't register if this command context is already receiving */
 275                         if (!receiving)
 276                         {
 277                                 receiving = 1;
 278                                 add_debug_msg_receiver(cmd_ctx, target);
 279                         }
 280                         charmsg_mode = !strcmp(args[0], "charmsg");
 281                 }
 282                 else if (!strcmp(args[0], "disable"))
 283                 {
 284                         /* no need to delete a receiver if none is registered */
 285                         if (receiving)
 286                         {
 287                                 receiving = 0;
 288                                 delete_debug_msg_receiver(cmd_ctx, target);
 289                         }
 290                 }
 291                 else
 292                 {
 293                         command_print(cmd_ctx, "usage: target_request debugmsgs ['enable'|'disable'|'charmsg']");
 294                 }
 295         }
 296
 297         command_print(cmd_ctx, "receiving debug messages from current target %s",
 298                       (receiving) ? (charmsg_mode?"charmsg":"enabled") : "disabled");
 299         return ERROR_OK;
 300 }
 301
 302 int target_request_register_commands(struct command_context_s *cmd_ctx)
 303 {
 304         target_request_cmd =
 305                 register_command(cmd_ctx, NULL, "target_request", NULL, COMMAND_ANY, "target_request commands");
 306
 307         register_command(cmd_ctx, target_request_cmd, "debugmsgs", handle_target_request_debugmsgs_command,
 308                 COMMAND_EXEC, "enable/disable reception of debug messages from target");
 309
 310         return ERROR_OK;
 311 }