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/* This file is part of the coreboot project. */
/* SPDX-License-Identifier: GPL-2.0-or-later */
#ifndef LOGLEVEL_H
#define LOGLEVEL_H
/**
* @file loglevel.h
*
* \brief Definitions of the log levels to be used in printk calls.
*
* Safe for inclusion in assembly.
*
*/
/**
* \brief BIOS_EMERG - Emergency / Fatal
*
* Log level for when the system is entirely unusable. To be used when execution
* is halting as a result of the failure. No further instructions should run.
*
* Example - End of all debug output / death notice.
*
* @{
*/
#define BIOS_EMERG 0
/** @} */
/**
* \brief BIOS_ALERT - Dying / Unrecoverable
*
* Log level for when the system is certainly in the process of dying.
* To be used when execution will eventually halt as a result of the
* failure, but the system can still output valuable debugging
* information.
*
* Example - Ram initialization fails, dumping relevant POST codes and
* information
*
* @{
*/
#define BIOS_ALERT 1
/** @} */
/**
* \brief BIOS_CRIT - Recovery unlikely
*
* Log level for when the system has experienced a dire issue in essential
* components. To be used when boot will probably be unsuccessful as a
* result of the failure, but recovery/retry can be attempted.
*
* Example - MSR failures, SMM/SMI failures.
* or
*
* @{
*/
#define BIOS_CRIT 2
/** @} */
/**
* \brief BIOS_ERR - System in incomplete state.
*
* Log level for when the system has experienced an issue that may not preclude
* a successful boot. To be used when coreboot execution may still succeed,
* but the error places some non-essential portion of the machine in a broken
* state that will be noticed downstream.
*
* Example - Payload could still load, but will be missing access to integral
* components such as drives.
*
* @{
*/
#define BIOS_ERR 3
/** @} */
/**
* \brief BIOS_WARNING - Bad configuration
*
* Log level for when the system has noticed an issue that most likely will
* not preclude a successful boot. To be used when something is wrong, and
* would likely be noticed by an end user.
*
* Example - Bad ME firmware, bad microcode, mis-clocked CPU
*
* @{
*/
#define BIOS_WARNING 4
/** @} */
/**
* \brief BIOS_NOTICE - Unexpected but relatively insignificant
*
* Log level for when the system has noticed an issue that is an edge case,
* but is handled and is recoverable. To be used when an end-user would likely
* not notice.
*
* Example - Hardware was misconfigured, but is promptly fixed.
*
* @{
*/
#define BIOS_NOTICE 5
/** @} */
/**
* \brief BIOS_INFO - Expected events.
*
* Log level for when the system has experienced some typical event.
* Messages should be superficial in nature.
*
* Example - Success messages. Status messages.
*
* @{
*/
#define BIOS_INFO 6
/** @} */
/**
* \brief BIOS_DEBUG - Verbose output
*
* Log level for details of a method. Messages may be dense,
* but should not be excessive. Messages should be detailed enough
* that this level provides sufficient details to diagnose a problem,
* but not necessarily enough to fix it.
*
* Example - Printing of important variables.
*
* @{
*/
#define BIOS_DEBUG 7
/** @} */
/**
* \brief BIOS_SPEW - Excessively verbose output
*
* Log level for intricacies of a method. Messages might contain raw
* data and will produce large logs. Developers should try to make sure
* that this level is not useful to anyone besides developers.
*
* Example - Data dumps.
*
* @{
*/
#define BIOS_SPEW 8
/** @} */
/**
* \brief BIOS_NEVER - Muted log level.
*
* Roughly equal to commenting out a printk statement. Because a user
* should not set their log level higher than 8, these statements
* are never printed.
*
* Example - A developer might locally define MY_LOGLEVEL to BIOS_SPEW,
* and later replace it with BIOS_NEVER as to mute their debug output.
*
* @{
*/
#define BIOS_NEVER 9
/** @} */
#endif /* LOGLEVEL_H */
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