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.h"
  31 #include "target_request.h"
  32 #include "target_type.h"
  33 #include "binarybuffer.h"
  34 #include "trace.h"
  35 #include "log.h"
  36
  37
  38 static struct command *target_request_cmd = NULL;
  39 static int charmsg_mode = 0;
  40
  41 static int target_asciimsg(struct target *target, uint32_t length)
  42 {
  43         char *msg = malloc(DIV_ROUND_UP(length + 1, 4) * 4);
  44         struct debug_msg_receiver *c = target->dbgmsg;
  45
  46         target->type->target_request_data(target, DIV_ROUND_UP(length, 4), (uint8_t*)msg);
  47         msg[length] = 0;
  48
  49         LOG_DEBUG("%s", msg);
  50
  51         while (c)
  52         {
  53                 command_print(c->cmd_ctx, "%s", msg);
  54                 c = c->next;
  55         }
  56
  57         return ERROR_OK;
  58 }
  59
  60 static int target_charmsg(struct target *target, uint8_t msg)
  61 {
  62         LOG_USER_N("%c", msg);
  63
  64         return ERROR_OK;
  65 }
  66
  67 static int target_hexmsg(struct target *target, int size, uint32_t length)
  68 {
  69         uint8_t *data = malloc(DIV_ROUND_UP(length * size, 4) * 4);
  70         char line[128];
  71         int line_len;
  72         struct debug_msg_receiver *c = target->dbgmsg;
  73         uint32_t i;
  74
  75         LOG_DEBUG("size: %i, length: %i", (int)size, (int)length);
  76
  77         target->type->target_request_data(target, DIV_ROUND_UP(length * size, 4), (uint8_t*)data);
  78
  79         line_len = 0;
  80         for (i = 0; i < length; i++)
  81         {
  82                 switch (size)
  83                 {
  84                         case 4:
  85                                 line_len += snprintf(line + line_len, 128 - line_len, "%8.8" PRIx32 " ", le_to_h_u32(data + (4*i)));
  86                                 break;
  87                         case 2:
  88                                 line_len += snprintf(line + line_len, 128 - line_len, "%4.4x ", le_to_h_u16(data + (2*i)));
  89                                 break;
  90                         case 1:
  91                                 line_len += snprintf(line + line_len, 128 - line_len, "%2.2x ", data[i]);
  92                                 break;
  93                 }
  94
  95                 if ((i%8 == 7) || (i == length - 1))
  96                 {
  97                         LOG_DEBUG("%s", line);
  98
  99                         while (c)
 100                         {
 101                                 command_print(c->cmd_ctx, "%s", line);
 102                                 c = c->next;
 103                         }
 104                         c = target->dbgmsg;
 105                         line_len = 0;
 106                 }
 107         }
 108
 109         free(data);
 110
 111         return ERROR_OK;
 112 }
 113
 114 /* handle requests from the target received by a target specific
 115  * side-band channel (e.g. ARM7/9 DCC)
 116  */
 117 int target_request(struct target *target, uint32_t request)
 118 {
 119         target_req_cmd_t target_req_cmd = request & 0xff;
 120
 121         if (charmsg_mode) {
 122                 target_charmsg(target, target_req_cmd);
 123                 return ERROR_OK;
 124         }
 125         switch (target_req_cmd)
 126         {
 127                 case TARGET_REQ_TRACEMSG:
 128                         trace_point(target, (request & 0xffffff00) >> 8);
 129                         break;
 130                 case TARGET_REQ_DEBUGMSG:
 131                         if (((request & 0xff00) >> 8) == 0)
 132                         {
 133                                 target_asciimsg(target, (request & 0xffff0000) >> 16);
 134                         }
 135                         else
 136                         {
 137                                 target_hexmsg(target, (request & 0xff00) >> 8, (request & 0xffff0000) >> 16);
 138                         }
 139                         break;
 140                 case TARGET_REQ_DEBUGCHAR:
 141                         target_charmsg(target, (request & 0x00ff0000) >> 16);
 142                         break;
 143 /*              case TARGET_REQ_SEMIHOSTING:
 144  *                      break;
 145  */
 146                 default:
 147                         LOG_ERROR("unknown target request: %2.2x", target_req_cmd);
 148                         break;
 149         }
 150
 151         return ERROR_OK;
 152 }
 153
 154 static int add_debug_msg_receiver(struct command_context *cmd_ctx, struct target *target)
 155 {
 156         struct debug_msg_receiver **p = &target->dbgmsg;
 157
 158         if (target == NULL)
 159                 return ERROR_INVALID_ARGUMENTS;
 160
 161         /* see if there's already a list */
 162         if (*p)
 163         {
 164                 /* find end of linked list */
 165                 p = &target->dbgmsg;
 166                 while ((*p)->next)
 167                         p = &((*p)->next);
 168                 p = &((*p)->next);
 169         }
 170
 171         /* add new debug message receiver */
 172         (*p) = malloc(sizeof(struct debug_msg_receiver));
 173         (*p)->cmd_ctx = cmd_ctx;
 174         (*p)->next = NULL;
 175
 176         /* enable callback */
 177         target->dbg_msg_enabled = 1;
 178
 179         return ERROR_OK;
 180 }
 181
 182 static struct debug_msg_receiver* find_debug_msg_receiver(struct command_context *cmd_ctx, struct target *target)
 183 {
 184         int do_all_targets = 0;
 185         struct debug_msg_receiver **p = &target->dbgmsg;
 186
 187         /* if no target has been specified search all of them */
 188         if (target == NULL)
 189         {
 190                 /* if no targets haven been specified */
 191                 if (all_targets == NULL)
 192                         return NULL;
 193
 194                 target = all_targets;
 195                 do_all_targets = 1;
 196         }
 197
 198         do
 199         {
 200                 while (*p)
 201                 {
 202                         if ((*p)->cmd_ctx == cmd_ctx)
 203                         {
 204                                 return *p;
 205                         }
 206                         p = &((*p)->next);
 207                 }
 208
 209                 target = target->next;
 210         } while (target && do_all_targets);
 211
 212         return NULL;
 213 }
 214
 215 int delete_debug_msg_receiver(struct command_context *cmd_ctx, struct target *target)
 216 {
 217         struct debug_msg_receiver **p;
 218         struct debug_msg_receiver *c;
 219         int do_all_targets = 0;
 220
 221         /* if no target has been specified search all of them */
 222         if (target == NULL)
 223         {
 224                 /* if no targets haven been specified */
 225                 if (all_targets == NULL)
 226                         return ERROR_OK;
 227
 228                 target = all_targets;
 229                 do_all_targets = 1;
 230         }
 231
 232         do
 233         {
 234                 p = &target->dbgmsg;
 235                 c = *p;
 236                 while (c)
 237                 {
 238                         struct debug_msg_receiver *next = c->next;
 239                         if (c->cmd_ctx == cmd_ctx)
 240                         {
 241                                 *p = next;
 242                                 free(c);
 243                                 if (*p == NULL)
 244                                 {
 245                                         /* disable callback */
 246                                         target->dbg_msg_enabled = 0;
 247                                 }
 248                                 return ERROR_OK;
 249                         }
 250                         else
 251                                 p = &(c->next);
 252                         c = next;
 253                 }
 254
 255                 target = target->next;
 256         } while (target && do_all_targets);
 257
 258         return ERROR_OK;
 259 }
 260
 261 COMMAND_HANDLER(handle_target_request_debugmsgs_command)
 262 {
 263         struct target *target = get_current_target(CMD_CTX);
 264
 265         int receiving = 0;
 266
 267         /* see if reciever is already registered */
 268         if (find_debug_msg_receiver(CMD_CTX, target) != NULL)
 269                 receiving = 1;
 270
 271         if (CMD_ARGC > 0)
 272         {
 273                 if (!strcmp(CMD_ARGV[0], "enable") || !strcmp(CMD_ARGV[0], "charmsg"))
 274                 {
 275                         /* don't register if this command context is already receiving */
 276                         if (!receiving)
 277                         {
 278                                 receiving = 1;
 279                                 add_debug_msg_receiver(CMD_CTX, target);
 280                         }
 281                         charmsg_mode = !strcmp(CMD_ARGV[0], "charmsg");
 282                 }
 283                 else if (!strcmp(CMD_ARGV[0], "disable"))
 284                 {
 285                         /* no need to delete a receiver if none is registered */
 286                         if (receiving)
 287                         {
 288                                 receiving = 0;
 289                                 delete_debug_msg_receiver(CMD_CTX, target);
 290                         }
 291                 }
 292                 else
 293                 {
 294                         command_print(CMD_CTX, "usage: target_request debugmsgs ['enable'|'disable'|'charmsg']");
 295                 }
 296         }
 297
 298         command_print(CMD_CTX, "receiving debug messages from current target %s",
 299                       (receiving) ? (charmsg_mode?"charmsg":"enabled") : "disabled");
 300         return ERROR_OK;
 301 }
 302
 303 int target_request_register_commands(struct command_context *cmd_ctx)
 304 {
 305         target_request_cmd =
 306                 register_command(cmd_ctx, NULL, "target_request", NULL, COMMAND_ANY, "target_request commands");
 307
 308         register_command(cmd_ctx, target_request_cmd, "debugmsgs", handle_target_request_debugmsgs_command,
 309                 COMMAND_EXEC, "enable/disable reception of debug messages from target");
 310
 311         return ERROR_OK;
 312 }