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
  31 #include <stdlib.h>
  32 #include <string.h>
  33
  34 command_t *target_request_cmd = NULL;
  35
  36 int target_asciimsg(target_t *target, u32 length)
  37 {
  38         char *msg = malloc(CEIL(length + 1, 4) * 4);
  39         debug_msg_receiver_t *c = target->dbgmsg;
  40
  41         target->type->target_request_data(target, CEIL(length, 4), (u8*)msg);
  42         msg[length] = 0;
  43
  44         DEBUG("%s", msg);
  45
  46         while (c)
  47         {
  48                 command_print(c->cmd_ctx, "%s", msg);
  49                 c = c->next;
  50         }
  51
  52         return ERROR_OK;
  53 }
  54
  55 int target_hexmsg(target_t *target, int size, u32 length)
  56 {
  57         if (size == 1)
  58         {
  59                 u8 *data = malloc(CEIL(length * sizeof(u8), 4) * 4);
  60
  61                 target->type->target_request_data(target, CEIL(length * sizeof(u8), 4), (u8*)data);
  62
  63                 free(data);
  64         }
  65         else if (size == 2)
  66         {
  67                 u16 *data = malloc(CEIL(length * sizeof(u16), 4) * 4);
  68
  69                 target->type->target_request_data(target, CEIL(length * sizeof(u16), 4), (u8*)data);
  70
  71                 free(data);
  72         }
  73         else if (size == 4)
  74         {
  75                 u32 *data = malloc(CEIL(length * sizeof(u32), 4) * 4);
  76
  77                 target->type->target_request_data(target, CEIL(length * sizeof(u32), 4), (u8*)data);
  78
  79                 free(data);
  80         }
  81         else
  82         {
  83                 ERROR("invalid debug message type");
  84         }
  85
  86         return ERROR_OK;
  87 }
  88
  89 /* handle requests from the target received by a target specific
  90  * side-band channel (e.g. ARM7/9 DCC)
  91  */
  92 int target_request(target_t *target, u32 request)
  93 {
  94         target_req_cmd_t target_req_cmd = request & 0xff;
  95
  96         switch (target_req_cmd)
  97         {
  98                 case TARGET_REQ_TRACEMSG:
  99                         DEBUG("tracepoint: %i", (request & 0xffffff00) >> 8);
 100                         break;
 101                 case TARGET_REQ_DEBUGMSG:
 102                         if (((request & 0xff00) >> 8) == 0)
 103                         {
 104                                 target_asciimsg(target, (request & 0xffff0000) >> 16);
 105                         }
 106                         else
 107                         {
 108                                 target_hexmsg(target, (request & 0xff00) >> 8, (request & 0xffff0000) >> 16);
 109                         }
 110                         break;
 111 /*              case TARGET_REQ_SEMIHOSTING:
 112  *                      break;
 113  */
 114                 default:
 115                         ERROR("unknown target request: %2.2x", target_req_cmd);
 116                         break;
 117         }
 118
 119         return ERROR_OK;
 120 }
 121
 122 int add_debug_msg_receiver(struct command_context_s *cmd_ctx, target_t *target)
 123 {
 124         debug_msg_receiver_t **p = &target->dbgmsg;
 125
 126         if (target == NULL)
 127                 return ERROR_INVALID_ARGUMENTS;
 128
 129         /* see if there's already a list */
 130         if (*p)
 131         {
 132                 /* find end of linked list */
 133                 p = &target->dbgmsg;
 134                 while ((*p)->next)
 135                         p = &((*p)->next);
 136                 p = &((*p)->next);
 137         }
 138
 139         /* add new debug message receiver */
 140         (*p) = malloc(sizeof(debug_msg_receiver_t));
 141         (*p)->cmd_ctx = cmd_ctx;
 142         (*p)->next = NULL;
 143
 144         return ERROR_OK;
 145 }
 146
 147 debug_msg_receiver_t* find_debug_msg_receiver(struct command_context_s *cmd_ctx, target_t *target)
 148 {
 149         int all_targets = 0;
 150         debug_msg_receiver_t **p = &target->dbgmsg;
 151
 152         /* if no target has been specified search all of them */
 153         if (target == NULL)
 154         {
 155                 /* if no targets haven been specified */
 156                 if (targets == NULL)
 157                         return NULL;
 158
 159                 target = targets;
 160                 all_targets = 1;
 161         }
 162
 163         do
 164         {
 165                 while (*p)
 166                 {
 167                         if ((*p)->cmd_ctx == cmd_ctx)
 168                         {
 169                                 return *p;
 170                         }
 171                         p = &((*p)->next);
 172                 }
 173
 174                 target = target->next;
 175         } while (target && all_targets);
 176
 177         return NULL;
 178 }
 179
 180 int delete_debug_msg_receiver(struct command_context_s *cmd_ctx, target_t *target)
 181 {
 182         debug_msg_receiver_t **p;
 183         debug_msg_receiver_t *c;
 184         int all_targets = 0;
 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 (targets == NULL)
 191                         return ERROR_OK;
 192
 193                 target = targets;
 194                 all_targets = 1;
 195         }
 196
 197         do
 198         {
 199                 while (c)
 200                 {
 201                         debug_msg_receiver_t *next = c->next;
 202                         if (c->cmd_ctx == cmd_ctx)
 203                         {
 204                                 *p = next;
 205                                 free(c);
 206                                 return ERROR_OK;
 207                         }
 208                         else
 209                                 p = &(c->next);
 210                         c = next;
 211                 }
 212
 213                 target = target->next;
 214         } while (target && all_targets);
 215
 216         return ERROR_OK;
 217 }
 218
 219 int handle_target_request_debugmsgs_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 220 {
 221         target_t *target = get_current_target(cmd_ctx);
 222
 223         int receiving = 0;
 224
 225         /* see if reciever is already registered */
 226         if (find_debug_msg_receiver(cmd_ctx, target) != NULL)
 227                 receiving = 1;
 228
 229         if (argc > 0)
 230         {
 231                 if (!strcmp(args[0], "enable"))
 232                 {
 233                         /* don't register if this command context is already receiving */
 234                         if (!receiving)
 235                         {
 236                                 receiving = 1;
 237                                 add_debug_msg_receiver(cmd_ctx, target);
 238                         }
 239                 }
 240                 else if (!strcmp(args[0], "disable"))
 241                 {
 242                         /* no need to delete a receiver if none is registered */
 243                         if (receiving)
 244                         {
 245                                 receiving = 0;
 246                                 delete_debug_msg_receiver(cmd_ctx, target);
 247                         }
 248                 }
 249                 else
 250                 {
 251                         command_print(cmd_ctx, "usage: target_request debugmsgs ['enable'|'disable']");
 252                 }
 253         }
 254
 255         command_print(cmd_ctx, "receiving debug messages from current target %s",
 256                         (receiving) ? "enabled" : "disabled");
 257
 258         return ERROR_OK;
 259 }
 260
 261 int target_request_register_commands(struct command_context_s *cmd_ctx)
 262 {
 263         target_request_cmd =
 264                 register_command(cmd_ctx, NULL, "target_request", NULL, COMMAND_ANY, "target_request commands");
 265
 266         register_command(cmd_ctx, target_request_cmd, "debugmsgs", handle_target_request_debugmsgs_command,
 267                 COMMAND_EXEC, "enable/disable reception of debug messgages from target");
 268
 269         return ERROR_OK;
 270 }