src/target/target_request.c

   1 /***************************************************************************
   2  *   Copyright (C) 2007 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 "replacements.h"
  25 #include "log.h"
  26 #include "target.h"
  27 #include "target_request.h"
  28 #include "binarybuffer.h"
  29 #include "command.h"
  30 #include "trace.h"
  31
  32 #include <stdlib.h>
  33 #include <string.h>
  34
  35 command_t *target_request_cmd = NULL;
  36
  37 int target_asciimsg(target_t *target, u32 length)
  38 {
  39         char *msg = malloc(CEIL(length + 1, 4) * 4);
  40         debug_msg_receiver_t *c = target->dbgmsg;
  41
  42         target->type->target_request_data(target, CEIL(length, 4), (u8*)msg);
  43         msg[length] = 0;
  44
  45         DEBUG("%s", msg);
  46
  47         while (c)
  48         {
  49                 command_print(c->cmd_ctx, "%s", msg);
  50                 c = c->next;
  51         }
  52
  53         return ERROR_OK;
  54 }
  55
  56 int target_hexmsg(target_t *target, int size, u32 length)
  57 {
  58         u8 *data = malloc(CEIL(length * size, 4) * 4);
  59         char line[128];
  60         int line_len;
  61         debug_msg_receiver_t *c = target->dbgmsg;
  62         int i;
  63
  64         DEBUG("size: %i, length: %i", size, length);
  65
  66         target->type->target_request_data(target, CEIL(length * size, 4), (u8*)data);
  67
  68         line_len = 0;
  69         for (i = 0; i < length; i++)
  70         {
  71                 switch (size)
  72                 {
  73                         case 4:
  74                                 line_len += snprintf(line + line_len, 128 - line_len, "%8.8x ", le_to_h_u32(data + (4*i)));
  75                                 break;
  76                         case 2:
  77                                 line_len += snprintf(line + line_len, 128 - line_len, "%4.4x ", le_to_h_u16(data + (2*i)));
  78                                 break;
  79                         case 1:
  80                                 line_len += snprintf(line + line_len, 128 - line_len, "%2.2x ", data[i]);
  81                                 break;
  82                 }
  83
  84                 if ((i%8 == 7) || (i == length - 1))
  85                 {
  86                         while (c)
  87                         {
  88                                 command_print(c->cmd_ctx, "%s", line);
  89                                 c = c->next;
  90                         }
  91                         c = target->dbgmsg;
  92                         line_len = 0;
  93                 }
  94         }
  95
  96         free(data);
  97
  98         return ERROR_OK;
  99 }
 100
 101 /* handle requests from the target received by a target specific
 102  * side-band channel (e.g. ARM7/9 DCC)
 103  */
 104 int target_request(target_t *target, u32 request)
 105 {
 106         target_req_cmd_t target_req_cmd = request & 0xff;
 107
 108         switch (target_req_cmd)
 109         {
 110                 case TARGET_REQ_TRACEMSG:
 111                         trace_point(target, (request & 0xffffff00) >> 8);
 112                         break;
 113                 case TARGET_REQ_DEBUGMSG:
 114                         if (((request & 0xff00) >> 8) == 0)
 115                         {
 116                                 target_asciimsg(target, (request & 0xffff0000) >> 16);
 117                         }
 118                         else
 119                         {
 120                                 target_hexmsg(target, (request & 0xff00) >> 8, (request & 0xffff0000) >> 16);
 121                         }
 122                         break;
 123 /*              case TARGET_REQ_SEMIHOSTING:
 124  *                      break;
 125  */
 126                 default:
 127                         ERROR("unknown target request: %2.2x", target_req_cmd);
 128                         break;
 129         }
 130
 131         return ERROR_OK;
 132 }
 133
 134 int add_debug_msg_receiver(struct command_context_s *cmd_ctx, target_t *target)
 135 {
 136         debug_msg_receiver_t **p = &target->dbgmsg;
 137
 138         if (target == NULL)
 139                 return ERROR_INVALID_ARGUMENTS;
 140
 141         /* see if there's already a list */
 142         if (*p)
 143         {
 144                 /* find end of linked list */
 145                 p = &target->dbgmsg;
 146                 while ((*p)->next)
 147                         p = &((*p)->next);
 148                 p = &((*p)->next);
 149         }
 150
 151         /* add new debug message receiver */
 152         (*p) = malloc(sizeof(debug_msg_receiver_t));
 153         (*p)->cmd_ctx = cmd_ctx;
 154         (*p)->next = NULL;
 155
 156         return ERROR_OK;
 157 }
 158
 159 debug_msg_receiver_t* find_debug_msg_receiver(struct command_context_s *cmd_ctx, target_t *target)
 160 {
 161         int all_targets = 0;
 162         debug_msg_receiver_t **p = &target->dbgmsg;
 163
 164         /* if no target has been specified search all of them */
 165         if (target == NULL)
 166         {
 167                 /* if no targets haven been specified */
 168                 if (targets == NULL)
 169                         return NULL;
 170
 171                 target = targets;
 172                 all_targets = 1;
 173         }
 174
 175         do
 176         {
 177                 while (*p)
 178                 {
 179                         if ((*p)->cmd_ctx == cmd_ctx)
 180                         {
 181                                 return *p;
 182                         }
 183                         p = &((*p)->next);
 184                 }
 185
 186                 target = target->next;
 187         } while (target && all_targets);
 188
 189         return NULL;
 190 }
 191
 192 int delete_debug_msg_receiver(struct command_context_s *cmd_ctx, target_t *target)
 193 {
 194         debug_msg_receiver_t **p;
 195         debug_msg_receiver_t *c;
 196         int all_targets = 0;
 197
 198         /* if no target has been specified search all of them */
 199         if (target == NULL)
 200         {
 201                 /* if no targets haven been specified */
 202                 if (targets == NULL)
 203                         return ERROR_OK;
 204
 205                 target = targets;
 206                 all_targets = 1;
 207         }
 208
 209         do
 210         {
 211                 p = &target->dbgmsg;
 212                 c = *p;
 213                 while (c)
 214                 {
 215                         debug_msg_receiver_t *next = c->next;
 216                         if (c->cmd_ctx == cmd_ctx)
 217                         {
 218                                 *p = next;
 219                                 free(c);
 220                                 return ERROR_OK;
 221                         }
 222                         else
 223                                 p = &(c->next);
 224                         c = next;
 225                 }
 226
 227                 target = target->next;
 228         } while (target && all_targets);
 229
 230         return ERROR_OK;
 231 }
 232
 233 int handle_target_request_debugmsgs_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 234 {
 235         target_t *target = get_current_target(cmd_ctx);
 236
 237         int receiving = 0;
 238
 239         /* see if reciever is already registered */
 240         if (find_debug_msg_receiver(cmd_ctx, target) != NULL)
 241                 receiving = 1;
 242
 243         if (argc > 0)
 244         {
 245                 if (!strcmp(args[0], "enable"))
 246                 {
 247                         /* don't register if this command context is already receiving */
 248                         if (!receiving)
 249                         {
 250                                 receiving = 1;
 251                                 add_debug_msg_receiver(cmd_ctx, target);
 252                         }
 253                 }
 254                 else if (!strcmp(args[0], "disable"))
 255                 {
 256                         /* no need to delete a receiver if none is registered */
 257                         if (receiving)
 258                         {
 259                                 receiving = 0;
 260                                 delete_debug_msg_receiver(cmd_ctx, target);
 261                         }
 262                 }
 263                 else
 264                 {
 265                         command_print(cmd_ctx, "usage: target_request debugmsgs ['enable'|'disable']");
 266                 }
 267         }
 268
 269         command_print(cmd_ctx, "receiving debug messages from current target %s",
 270                         (receiving) ? "enabled" : "disabled");
 271
 272         return ERROR_OK;
 273 }
 274
 275 int target_request_register_commands(struct command_context_s *cmd_ctx)
 276 {
 277         target_request_cmd =
 278                 register_command(cmd_ctx, NULL, "target_request", NULL, COMMAND_ANY, "target_request commands");
 279
 280         register_command(cmd_ctx, target_request_cmd, "debugmsgs", handle_target_request_debugmsgs_command,
 281                 COMMAND_EXEC, "enable/disable reception of debug messgages from target");
 282
 283         return ERROR_OK;
 284 }