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  *   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 "replacements.h"
  28 #include "log.h"
  29 #include "target.h"
  30 #include "target_request.h"
  31 #include "binarybuffer.h"
  32 #include "command.h"
  33 #include "trace.h"
  34
  35 #include <stdlib.h>
  36 #include <string.h>
  37
  38 command_t *target_request_cmd = NULL;
  39
  40 int target_asciimsg(target_t *target, u32 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), (u8*)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 int target_charmsg(target_t *target, u8 msg)
  60 {
  61         LOG_USER_N("%c", msg);
  62
  63         return ERROR_OK;
  64 }
  65
  66 int target_hexmsg(target_t *target, int size, u32 length)
  67 {
  68         u8 *data = malloc(CEIL(length * size, 4) * 4);
  69         char line[128];
  70         int line_len;
  71         debug_msg_receiver_t *c = target->dbgmsg;
  72         int i;
  73
  74         LOG_DEBUG("size: %i, length: %i", size, length);
  75
  76         target->type->target_request_data(target, CEIL(length * size, 4), (u8*)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, "%8.8x ", 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, u32 request)
 117 {
 118         target_req_cmd_t target_req_cmd = request & 0xff;
 119
 120         switch (target_req_cmd)
 121         {
 122                 case TARGET_REQ_TRACEMSG:
 123                         trace_point(target, (request & 0xffffff00) >> 8);
 124                         break;
 125                 case TARGET_REQ_DEBUGMSG:
 126                         if (((request & 0xff00) >> 8) == 0)
 127                         {
 128                                 target_asciimsg(target, (request & 0xffff0000) >> 16);
 129                         }
 130                         else
 131                         {
 132                                 target_hexmsg(target, (request & 0xff00) >> 8, (request & 0xffff0000) >> 16);
 133                         }
 134                         break;
 135                 case TARGET_REQ_DEBUGCHAR:
 136                         target_charmsg(target, (request & 0x00ff0000) >> 16);
 137                         break;
 138 /*              case TARGET_REQ_SEMIHOSTING:
 139  *                      break;
 140  */
 141                 default:
 142                         LOG_ERROR("unknown target request: %2.2x", target_req_cmd);
 143                         break;
 144         }
 145
 146         return ERROR_OK;
 147 }
 148
 149 int add_debug_msg_receiver(struct command_context_s *cmd_ctx, target_t *target)
 150 {
 151         debug_msg_receiver_t **p = &target->dbgmsg;
 152
 153         if (target == NULL)
 154                 return ERROR_INVALID_ARGUMENTS;
 155
 156         /* see if there's already a list */
 157         if (*p)
 158         {
 159                 /* find end of linked list */
 160                 p = &target->dbgmsg;
 161                 while ((*p)->next)
 162                         p = &((*p)->next);
 163                 p = &((*p)->next);
 164         }
 165
 166         /* add new debug message receiver */
 167         (*p) = malloc(sizeof(debug_msg_receiver_t));
 168         (*p)->cmd_ctx = cmd_ctx;
 169         (*p)->next = NULL;
 170
 171         /* enable callback */
 172         target->dbg_msg_enabled = 1;
 173
 174         return ERROR_OK;
 175 }
 176
 177 debug_msg_receiver_t* find_debug_msg_receiver(struct command_context_s *cmd_ctx, target_t *target)
 178 {
 179         int all_targets = 0;
 180         debug_msg_receiver_t **p = &target->dbgmsg;
 181
 182         /* if no target has been specified search all of them */
 183         if (target == NULL)
 184         {
 185                 /* if no targets haven been specified */
 186                 if (targets == NULL)
 187                         return NULL;
 188
 189                 target = targets;
 190                 all_targets = 1;
 191         }
 192
 193         do
 194         {
 195                 while (*p)
 196                 {
 197                         if ((*p)->cmd_ctx == cmd_ctx)
 198                         {
 199                                 return *p;
 200                         }
 201                         p = &((*p)->next);
 202                 }
 203
 204                 target = target->next;
 205         } while (target && all_targets);
 206
 207         return NULL;
 208 }
 209
 210 int delete_debug_msg_receiver(struct command_context_s *cmd_ctx, target_t *target)
 211 {
 212         debug_msg_receiver_t **p;
 213         debug_msg_receiver_t *c;
 214         int all_targets = 0;
 215
 216         /* if no target has been specified search all of them */
 217         if (target == NULL)
 218         {
 219                 /* if no targets haven been specified */
 220                 if (targets == NULL)
 221                         return ERROR_OK;
 222
 223                 target = targets;
 224                 all_targets = 1;
 225         }
 226
 227         do
 228         {
 229                 p = &target->dbgmsg;
 230                 c = *p;
 231                 while (c)
 232                 {
 233                         debug_msg_receiver_t *next = c->next;
 234                         if (c->cmd_ctx == cmd_ctx)
 235                         {
 236                                 *p = next;
 237                                 free(c);
 238                                 if (*p == NULL)
 239                                 {
 240                                         /* disable callback */
 241                                         target->dbg_msg_enabled = 0;
 242                                 }
 243                                 return ERROR_OK;
 244                         }
 245                         else
 246                                 p = &(c->next);
 247                         c = next;
 248                 }
 249
 250                 target = target->next;
 251         } while (target && all_targets);
 252
 253         return ERROR_OK;
 254 }
 255
 256 int handle_target_request_debugmsgs_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 257 {
 258         target_t *target = get_current_target(cmd_ctx);
 259
 260         int receiving = 0;
 261
 262         /* see if reciever is already registered */
 263         if (find_debug_msg_receiver(cmd_ctx, target) != NULL)
 264                 receiving = 1;
 265
 266         if (argc > 0)
 267         {
 268                 if (!strcmp(args[0], "enable"))
 269                 {
 270                         /* don't register if this command context is already receiving */
 271                         if (!receiving)
 272                         {
 273                                 receiving = 1;
 274                                 add_debug_msg_receiver(cmd_ctx, target);
 275                         }
 276                 }
 277                 else if (!strcmp(args[0], "disable"))
 278                 {
 279                         /* no need to delete a receiver if none is registered */
 280                         if (receiving)
 281                         {
 282                                 receiving = 0;
 283                                 delete_debug_msg_receiver(cmd_ctx, target);
 284                         }
 285                 }
 286                 else
 287                 {
 288                         command_print(cmd_ctx, "usage: target_request debugmsgs ['enable'|'disable']");
 289                 }
 290         }
 291
 292         command_print(cmd_ctx, "receiving debug messages from current target %s",
 293                         (receiving) ? "enabled" : "disabled");
 294
 295         return ERROR_OK;
 296 }
 297
 298 int target_request_register_commands(struct command_context_s *cmd_ctx)
 299 {
 300         target_request_cmd =
 301                 register_command(cmd_ctx, NULL, "target_request", NULL, COMMAND_ANY, "target_request commands");
 302
 303         register_command(cmd_ctx, target_request_cmd, "debugmsgs", handle_target_request_debugmsgs_command,
 304                 COMMAND_EXEC, "enable/disable reception of debug messgages from target");
 305
 306         return ERROR_OK;
 307 }