1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
/*
* Copyright (c) 2017-2018, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <assert.h>
#include <debug.h>
#include <platform.h>
/* Set the default maximum log level to the `LOG_LEVEL` build flag */
static unsigned int max_log_level = LOG_LEVEL;
/*
* The common log function which is invoked by ARM Trusted Firmware code.
* This function should not be directly invoked and is meant to be
* only used by the log macros defined in debug.h. The function
* expects the first character in the format string to be one of the
* LOG_MARKER_* macros defined in debug.h.
*/
void tf_log(const char *fmt, ...)
{
unsigned int log_level;
va_list args;
const char *prefix_str;
/* We expect the LOG_MARKER_* macro as the first character */
log_level = fmt[0];
/* Verify that log_level is one of LOG_MARKER_* macro defined in debug.h */
assert((log_level > 0U) && (log_level <= LOG_LEVEL_VERBOSE));
assert((log_level % 10U) == 0U);
if (log_level > max_log_level)
return;
prefix_str = plat_log_get_prefix(log_level);
while (*prefix_str != '\0') {
(void)putchar(*prefix_str);
prefix_str++;
}
va_start(args, fmt);
(void)vprintf(fmt + 1, args);
va_end(args);
}
/*
* The helper function to set the log level dynamically by platform. The
* maximum log level is determined by `LOG_LEVEL` build flag at compile time
* and this helper can set a lower (or equal) log level than the one at compile.
*/
void tf_log_set_max_level(unsigned int log_level)
{
assert(log_level <= LOG_LEVEL_VERBOSE);
assert((log_level % 10U) == 0U);
/* Cap log_level to the compile time maximum. */
if (log_level <= (unsigned int)LOG_LEVEL)
max_log_level = log_level;
}