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, see <http://www.gnu.org/licenses/>. *
  17  ***************************************************************************/
  18
  19 #ifdef HAVE_CONFIG_H
  20 #include "config.h"
  21 #endif
  22
  23 #include "arm.h"
  24 #include "etm_dummy.h"
  25
  26 COMMAND_HANDLER(handle_etm_dummy_config_command)
  27 {
  28         struct target *target;
  29         struct arm *arm;
  30
  31         target = get_target(CMD_ARGV[0]);
  32
  33         if (!target) {
  34                 LOG_ERROR("target '%s' not defined", CMD_ARGV[0]);
  35                 return ERROR_FAIL;
  36         }
  37
  38         arm = target_to_arm(target);
  39         if (!is_arm(arm)) {
  40                 command_print(CMD_CTX, "target '%s' isn't an ARM", CMD_ARGV[0]);
  41                 return ERROR_FAIL;
  42         }
  43
  44         if (arm->etm)
  45                 arm->etm->capture_driver_priv = NULL;
  46         else {
  47                 LOG_ERROR("target has no ETM defined, ETM dummy left unconfigured");
  48                 return ERROR_FAIL;
  49         }
  50
  51         return ERROR_OK;
  52 }
  53
  54 static const struct command_registration etm_dummy_config_command_handlers[] = {
  55         {
  56                 .name = "config",
  57                 .handler = handle_etm_dummy_config_command,
  58                 .mode = COMMAND_CONFIG,
  59                 .usage = "target",
  60         },
  61         COMMAND_REGISTRATION_DONE
  62 };
  63 static const struct command_registration etm_dummy_command_handlers[] = {
  64         {
  65                 .name = "etm_dummy",
  66                 .mode = COMMAND_ANY,
  67                 .help = "Dummy ETM capture driver command group",
  68                 .chain = etm_dummy_config_command_handlers,
  69         },
  70         COMMAND_REGISTRATION_DONE
  71 };
  72
  73 static int etm_dummy_init(struct etm_context *etm_ctx)
  74 {
  75         return ERROR_OK;
  76 }
  77
  78 static trace_status_t etm_dummy_status(struct etm_context *etm_ctx)
  79 {
  80         return TRACE_IDLE;
  81 }
  82
  83 static int etm_dummy_read_trace(struct etm_context *etm_ctx)
  84 {
  85         return ERROR_OK;
  86 }
  87
  88 static int etm_dummy_start_capture(struct etm_context *etm_ctx)
  89 {
  90         return ERROR_ETM_PORTMODE_NOT_SUPPORTED;
  91 }
  92
  93 static int etm_dummy_stop_capture(struct etm_context *etm_ctx)
  94 {
  95         return ERROR_OK;
  96 }
  97
  98 struct etm_capture_driver etm_dummy_capture_driver = {
  99         .name = "dummy",
 100         .commands = etm_dummy_command_handlers,
 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 };