src/target/etm_dummy.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2
   3 /***************************************************************************
   4  *   Copyright (C) 2007 by Dominic Rath                                    *
   5  *   Dominic.Rath@gmx.de                                                   *
   6  ***************************************************************************/
   7
   8 #ifdef HAVE_CONFIG_H
   9 #include "config.h"
  10 #endif
  11
  12 #include "arm.h"
  13 #include "etm_dummy.h"
  14
  15 COMMAND_HANDLER(handle_etm_dummy_config_command)
  16 {
  17         struct target *target;
  18         struct arm *arm;
  19
  20         target = get_target(CMD_ARGV[0]);
  21
  22         if (!target) {
  23                 LOG_ERROR("target '%s' not defined", CMD_ARGV[0]);
  24                 return ERROR_FAIL;
  25         }
  26
  27         arm = target_to_arm(target);
  28         if (!is_arm(arm)) {
  29                 command_print(CMD, "target '%s' isn't an ARM", CMD_ARGV[0]);
  30                 return ERROR_FAIL;
  31         }
  32
  33         if (arm->etm)
  34                 arm->etm->capture_driver_priv = NULL;
  35         else {
  36                 LOG_ERROR("target has no ETM defined, ETM dummy left unconfigured");
  37                 return ERROR_FAIL;
  38         }
  39
  40         return ERROR_OK;
  41 }
  42
  43 static const struct command_registration etm_dummy_config_command_handlers[] = {
  44         {
  45                 .name = "config",
  46                 .handler = handle_etm_dummy_config_command,
  47                 .mode = COMMAND_CONFIG,
  48                 .usage = "target",
  49         },
  50         COMMAND_REGISTRATION_DONE
  51 };
  52 static const struct command_registration etm_dummy_command_handlers[] = {
  53         {
  54                 .name = "etm_dummy",
  55                 .mode = COMMAND_ANY,
  56                 .help = "Dummy ETM capture driver command group",
  57                 .chain = etm_dummy_config_command_handlers,
  58                 .usage = "",
  59         },
  60         COMMAND_REGISTRATION_DONE
  61 };
  62
  63 static int etm_dummy_init(struct etm_context *etm_ctx)
  64 {
  65         return ERROR_OK;
  66 }
  67
  68 static trace_status_t etm_dummy_status(struct etm_context *etm_ctx)
  69 {
  70         return TRACE_IDLE;
  71 }
  72
  73 static int etm_dummy_read_trace(struct etm_context *etm_ctx)
  74 {
  75         return ERROR_OK;
  76 }
  77
  78 static int etm_dummy_start_capture(struct etm_context *etm_ctx)
  79 {
  80         return ERROR_ETM_PORTMODE_NOT_SUPPORTED;
  81 }
  82
  83 static int etm_dummy_stop_capture(struct etm_context *etm_ctx)
  84 {
  85         return ERROR_OK;
  86 }
  87
  88 struct etm_capture_driver etm_dummy_capture_driver = {
  89         .name = "dummy",
  90         .commands = etm_dummy_command_handlers,
  91         .init = etm_dummy_init,
  92         .status = etm_dummy_status,
  93         .start_capture = etm_dummy_start_capture,
  94         .stop_capture = etm_dummy_stop_capture,
  95         .read_trace = etm_dummy_read_trace,
  96 };