1 /***************************************************************************
2 * Copyright (C) 2015 Paul Fertser <fercerpav@gmail.com> *
4 * This program is free software; you can redistribute it and/or modify *
5 * it under the terms of the GNU General Public License as published by *
6 * the Free Software Foundation; either version 2 of the License, or *
7 * (at your option) any later version. *
9 * This program is distributed in the hope that it will be useful, *
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
12 * GNU General Public License for more details. *
13 ***************************************************************************/
15 #ifndef ARMV7M_TRACE_H
16 #define ARMV7M_TRACE_H
22 * Holds the interface to TPIU, ITM and DWT configuration functions.
25 enum trace_config_type {
26 DISABLED, /**< tracing is disabled */
27 EXTERNAL, /**< trace output is captured externally */
28 INTERNAL /**< trace output is handled by OpenOCD adapter driver */
31 enum tpio_pin_protocol {
32 SYNC, /**< synchronous trace output */
33 ASYNC_MANCHESTER, /**< asynchronous output with Manchester coding */
34 ASYNC_UART /**< asynchronous output with NRZ coding */
37 enum itm_ts_prescaler {
38 ITM_TS_PRESCALE1, /**< no prescaling for the timestamp counter */
39 ITM_TS_PRESCALE4, /**< refclock divided by 4 for the timestamp counter */
40 ITM_TS_PRESCALE16, /**< refclock divided by 16 for the timestamp counter */
41 ITM_TS_PRESCALE64, /**< refclock divided by 64 for the timestamp counter */
44 struct armv7m_trace_config {
45 /** Currently active trace capture mode */
46 enum trace_config_type config_type;
48 /** Currently active trace output mode */
49 enum tpio_pin_protocol pin_protocol;
50 /** TPIU formatter enable/disable (in async mode) */
52 /** Synchronous output port width */
55 /** Bitmask of currenty enabled ITM stimuli */
57 /** Identifier for multi-source trace stream formatting */
58 unsigned int trace_bus_id;
59 /** Prescaler for the timestamp counter */
60 enum itm_ts_prescaler itm_ts_prescale;
61 /** Enable differential timestamps */
62 bool itm_diff_timestamps;
63 /** Enable async timestamps model */
64 bool itm_async_timestamps;
65 /** Enable synchronisation packet transmission (for sync port only) */
66 bool itm_synchro_packets;
68 /** Current frequency of TRACECLKIN (usually matches HCLK) */
69 unsigned int traceclkin_freq;
70 /** Current frequency of trace port */
71 unsigned int trace_freq;
72 /** Handle to output trace data in INTERNAL capture mode */
76 extern const struct command_registration armv7m_trace_command_handlers[];
79 * Configure hardware accordingly to the current TPIU target settings
81 int armv7m_trace_tpiu_config(struct target *target);
83 * Configure hardware accordingly to the current ITM target settings
85 int armv7m_trace_itm_config(struct target *target);