blob: 422959f6065255485791ae113c311505f5ec45c0 [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
7#include <assert.h>
8#include <debug.h>
9#include <platform.h>
10
11/* Set the default maximum log level to the `LOG_LEVEL` build flag */
12static unsigned int max_log_level = LOG_LEVEL;
13
14/*
15 * The common log function which is invoked by ARM Trusted Firmware code.
16 * This function should not be directly invoked and is meant to be
17 * only used by the log macros defined in debug.h. The function
18 * expects the first character in the format string to be one of the
19 * LOG_MARKER_* macros defined in debug.h.
20 */
21void tf_log(const char *fmt, ...)
22{
23 unsigned int log_level;
24 va_list args;
25 const char *prefix_str;
26
27 /* We expect the LOG_MARKER_* macro as the first character */
28 log_level = fmt[0];
29
30 /* Verify that log_level is one of LOG_MARKER_* macro defined in debug.h */
Antonio Nino Diaz14fabd02018-08-28 11:44:44 +010031 assert((log_level > 0U) && (log_level <= LOG_LEVEL_VERBOSE));
32 assert((log_level % 10U) == 0U);
Soby Mathewaaf15f52017-09-04 11:49:29 +010033
34 if (log_level > max_log_level)
35 return;
36
37 prefix_str = plat_log_get_prefix(log_level);
38
Antonio Nino Diaz14fabd02018-08-28 11:44:44 +010039 while (*prefix_str != '\0') {
40 (void)putchar(*prefix_str);
41 prefix_str++;
42 }
Soby Mathewaaf15f52017-09-04 11:49:29 +010043
44 va_start(args, fmt);
Antonio Nino Diaz14fabd02018-08-28 11:44:44 +010045 (void)vprintf(fmt + 1, args);
Soby Mathewaaf15f52017-09-04 11:49:29 +010046 va_end(args);
47}
48
49/*
50 * The helper function to set the log level dynamically by platform. The
51 * maximum log level is determined by `LOG_LEVEL` build flag at compile time
52 * and this helper can set a lower log level than the one at compile.
53 */
54void tf_log_set_max_level(unsigned int log_level)
55{
56 assert(log_level <= LOG_LEVEL_VERBOSE);
Antonio Nino Diaz14fabd02018-08-28 11:44:44 +010057 assert((log_level % 10U) == 0U);
Soby Mathewaaf15f52017-09-04 11:49:29 +010058
59 /* Cap log_level to the compile time maximum. */
Antonio Nino Diaz14fabd02018-08-28 11:44:44 +010060 if (log_level < (unsigned int)LOG_LEVEL)
Soby Mathewaaf15f52017-09-04 11:49:29 +010061 max_log_level = log_level;
Soby Mathewaaf15f52017-09-04 11:49:29 +010062}