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[openocd] / 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(args[0]);
34
35         if (!target)
36         {
37                 LOG_ERROR("target '%s' not defined", args[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", args[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_s *cmd_ctx)
62 {
63         command_t *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 };