blob: 3e174dda089265d92d49a0cf0ef88c557007e261 [file] [log] [blame]
Soby Mathewaaf15f52017-09-04 11:49:29 +01001/*
Antonio Nino Diazc0c8eb62018-08-15 17:02:28 +01002 * Copyright (c) 2017-2018, ARM Limited and Contributors. All rights reserved.
Soby Mathewaaf15f52017-09-04 11:49:29 +01003 *
4 * SPDX-License-Identifier: BSD-3-Clause
5 */
6
Antonio Nino Diaze0f90632018-12-14 00:18:21 +00007#include <stdarg.h>
Soby Mathewaaf15f52017-09-04 11:49:29 +01008#include <assert.h>
Antonio Nino Diaze0f90632018-12-14 00:18:21 +00009#include <stdio.h>
10
11#include <common/debug.h>
12#include <plat/common/platform.h>
Soby Mathewaaf15f52017-09-04 11:49:29 +010013
14/* Set the default maximum log level to the `LOG_LEVEL` build flag */
15static unsigned int max_log_level = LOG_LEVEL;
16
17/*
18 * The common log function which is invoked by ARM Trusted Firmware code.
19 * This function should not be directly invoked and is meant to be
20 * only used by the log macros defined in debug.h. The function
21 * expects the first character in the format string to be one of the
22 * LOG_MARKER_* macros defined in debug.h.
23 */
24void tf_log(const char *fmt, ...)
25{
26 unsigned int log_level;
27 va_list args;
28 const char *prefix_str;
29
30 /* We expect the LOG_MARKER_* macro as the first character */
31 log_level = fmt[0];
32
33 /* Verify that log_level is one of LOG_MARKER_* macro defined in debug.h */
Antonio Nino Diaz14fabd02018-08-28 11:44:44 +010034 assert((log_level > 0U) && (log_level <= LOG_LEVEL_VERBOSE));
35 assert((log_level % 10U) == 0U);
Soby Mathewaaf15f52017-09-04 11:49:29 +010036
37 if (log_level > max_log_level)
38 return;
39
40 prefix_str = plat_log_get_prefix(log_level);
41
Antonio Nino Diaz14fabd02018-08-28 11:44:44 +010042 while (*prefix_str != '\0') {
43 (void)putchar(*prefix_str);
44 prefix_str++;
45 }
Soby Mathewaaf15f52017-09-04 11:49:29 +010046
47 va_start(args, fmt);
Antonio Nino Diaz14fabd02018-08-28 11:44:44 +010048 (void)vprintf(fmt + 1, args);
Soby Mathewaaf15f52017-09-04 11:49:29 +010049 va_end(args);
50}
51
52/*
53 * The helper function to set the log level dynamically by platform. The
54 * maximum log level is determined by `LOG_LEVEL` build flag at compile time
Junhan Zhou5a1451e2018-09-10 16:36:06 -040055 * and this helper can set a lower (or equal) log level than the one at compile.
Soby Mathewaaf15f52017-09-04 11:49:29 +010056 */
57void tf_log_set_max_level(unsigned int log_level)
58{
59 assert(log_level <= LOG_LEVEL_VERBOSE);
Antonio Nino Diaz14fabd02018-08-28 11:44:44 +010060 assert((log_level % 10U) == 0U);
Soby Mathewaaf15f52017-09-04 11:49:29 +010061
62 /* Cap log_level to the compile time maximum. */
Junhan Zhou5a1451e2018-09-10 16:36:06 -040063 if (log_level <= (unsigned int)LOG_LEVEL)
Soby Mathewaaf15f52017-09-04 11:49:29 +010064 max_log_level = log_level;
Soby Mathewaaf15f52017-09-04 11:49:29 +010065}