66 lines
1.7 KiB
C
66 lines
1.7 KiB
C
/*
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* Copyright (c) 2017-2019, Arm Limited and Contributors. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <stdarg.h>
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#include <assert.h>
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#include <stdio.h>
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#include <common/debug.h>
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#include <plat/common/platform.h>
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/* Set the default maximum log level to the `LOG_LEVEL` build flag */
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static unsigned int max_log_level = LOG_LEVEL;
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/*
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* The common log function which is invoked by TF-A code.
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* This function should not be directly invoked and is meant to be
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* only used by the log macros defined in debug.h. The function
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* expects the first character in the format string to be one of the
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* LOG_MARKER_* macros defined in debug.h.
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*/
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void tf_log(const char *fmt, ...)
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{
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unsigned int log_level;
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va_list args;
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const char *prefix_str;
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/* We expect the LOG_MARKER_* macro as the first character */
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log_level = fmt[0];
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/* Verify that log_level is one of LOG_MARKER_* macro defined in debug.h */
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assert((log_level > 0U) && (log_level <= LOG_LEVEL_VERBOSE));
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assert((log_level % 10U) == 0U);
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if (log_level > max_log_level)
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return;
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prefix_str = plat_log_get_prefix(log_level);
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while (*prefix_str != '\0') {
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(void)putchar(*prefix_str);
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prefix_str++;
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}
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va_start(args, fmt);
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(void)vprintf(fmt + 1, args);
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va_end(args);
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}
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/*
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* The helper function to set the log level dynamically by platform. The
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* maximum log level is determined by `LOG_LEVEL` build flag at compile time
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* and this helper can set a lower (or equal) log level than the one at compile.
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*/
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void tf_log_set_max_level(unsigned int log_level)
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{
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assert(log_level <= LOG_LEVEL_VERBOSE);
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assert((log_level % 10U) == 0U);
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/* Cap log_level to the compile time maximum. */
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if (log_level <= (unsigned int)LOG_LEVEL)
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max_log_level = log_level;
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}
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