src/target/etm_dummy.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 "armv4_5.h"
  25 #include "etm_dummy.h"
  26
  27
  28 COMMAND_HANDLER(handle_etm_dummy_config_command)
  29 {
  30         struct target *target;
  31         struct arm *arm;
  32
  33         target = get_target(CMD_ARGV[0]);
  34
  35         if (!target)
  36         {
  37                 LOG_ERROR("target '%s' not defined", CMD_ARGV[0]);
  38                 return ERROR_FAIL;
  39         }
  40
  41         arm = target_to_arm(target);
  42         if (!is_arm(arm))
  43         {
  44                 command_print(CMD_CTX, "target '%s' isn't an ARM", CMD_ARGV[0]);
  45                 return ERROR_FAIL;
  46         }
  47
  48         if (arm->etm)
  49         {
  50                 arm->etm->capture_driver_priv = NULL;
  51         }
  52         else
  53         {
  54                 LOG_ERROR("target has no ETM defined, ETM dummy left unconfigured");
  55                 return ERROR_FAIL;
  56         }
  57
  58         return ERROR_OK;
  59 }
  60
  61 static int etm_dummy_register_commands(struct command_context *cmd_ctx)
  62 {
  63         struct command *etm_dummy_cmd;
  64
  65         etm_dummy_cmd = register_command(cmd_ctx, NULL, "etm_dummy", NULL, COMMAND_ANY, "Dummy ETM capture driver");
  66
  67         register_command(cmd_ctx, etm_dummy_cmd, "config", handle_etm_dummy_config_command, COMMAND_CONFIG, NULL);
  68
  69         return ERROR_OK;
  70 }
  71
  72 static int etm_dummy_init(struct etm_context *etm_ctx)
  73 {
  74         return ERROR_OK;
  75 }
  76
  77 static trace_status_t etm_dummy_status(struct etm_context *etm_ctx)
  78 {
  79         return TRACE_IDLE;
  80 }
  81
  82 static int etm_dummy_read_trace(struct etm_context *etm_ctx)
  83 {
  84         return ERROR_OK;
  85 }
  86
  87 static int etm_dummy_start_capture(struct etm_context *etm_ctx)
  88 {
  89         return ERROR_ETM_PORTMODE_NOT_SUPPORTED;
  90 }
  91
  92 static int etm_dummy_stop_capture(struct etm_context *etm_ctx)
  93 {
  94         return ERROR_OK;
  95 }
  96
  97 struct etm_capture_driver etm_dummy_capture_driver =
  98 {
  99         .name = "dummy",
 100         .register_commands = etm_dummy_register_commands,
 101         .init = etm_dummy_init,
 102         .status = etm_dummy_status,
 103         .start_capture = etm_dummy_start_capture,
 104         .stop_capture = etm_dummy_stop_capture,
 105         .read_trace = etm_dummy_read_trace,
 106 };