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
  21 #ifdef HAVE_CONFIG_H
  22 #include "config.h"
  23 #endif
  24
  25 #include "arm.h"
  26 #include "etm_dummy.h"
  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                 LOG_ERROR("target '%s' not defined", CMD_ARGV[0]);
  37                 return ERROR_FAIL;
  38         }
  39
  40         arm = target_to_arm(target);
  41         if (!is_arm(arm)) {
  42                 command_print(CMD_CTX, "target '%s' isn't an ARM", CMD_ARGV[0]);
  43                 return ERROR_FAIL;
  44         }
  45
  46         if (arm->etm)
  47                 arm->etm->capture_driver_priv = NULL;
  48         else {
  49                 LOG_ERROR("target has no ETM defined, ETM dummy left unconfigured");
  50                 return ERROR_FAIL;
  51         }
  52
  53         return ERROR_OK;
  54 }
  55
  56 static const struct command_registration etm_dummy_config_command_handlers[] = {
  57         {
  58                 .name = "config",
  59                 .handler = handle_etm_dummy_config_command,
  60                 .mode = COMMAND_CONFIG,
  61                 .usage = "target",
  62         },
  63         COMMAND_REGISTRATION_DONE
  64 };
  65 static const struct command_registration etm_dummy_command_handlers[] = {
  66         {
  67                 .name = "etm_dummy",
  68                 .mode = COMMAND_ANY,
  69                 .help = "Dummy ETM capture driver command group",
  70                 .chain = etm_dummy_config_command_handlers,
  71         },
  72         COMMAND_REGISTRATION_DONE
  73 };
  74
  75 static int etm_dummy_init(struct etm_context *etm_ctx)
  76 {
  77         return ERROR_OK;
  78 }
  79
  80 static trace_status_t etm_dummy_status(struct etm_context *etm_ctx)
  81 {
  82         return TRACE_IDLE;
  83 }
  84
  85 static int etm_dummy_read_trace(struct etm_context *etm_ctx)
  86 {
  87         return ERROR_OK;
  88 }
  89
  90 static int etm_dummy_start_capture(struct etm_context *etm_ctx)
  91 {
  92         return ERROR_ETM_PORTMODE_NOT_SUPPORTED;
  93 }
  94
  95 static int etm_dummy_stop_capture(struct etm_context *etm_ctx)
  96 {
  97         return ERROR_OK;
  98 }
  99
 100 struct etm_capture_driver etm_dummy_capture_driver = {
 101         .name = "dummy",
 102         .commands = etm_dummy_command_handlers,
 103         .init = etm_dummy_init,
 104         .status = etm_dummy_status,
 105         .start_capture = etm_dummy_start_capture,
 106         .stop_capture = etm_dummy_stop_capture,
 107         .read_trace = etm_dummy_read_trace,
 108 };