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log: Set up a flag byte for log records

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At present only a single flag (force_debug) is used in log records. Before
adding more, convert this into a bitfield, so more can be added without
using more space.

To avoid expanding the log_record struct itself (which some drivers may
wish to store in memory) reduce the line-number field to 16 bits. This
provides for up to 64K lines which should be enough for anyone.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2021-01-20 20:10:52 -07:00 committed by Tom Rini
parent c57ec2c2ba
commit 79d5983b61
2 changed files with 16 additions and 7 deletions
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9
common/log.c
View file

@ -153,7 +153,7 @@ static bool log_passes_filters(struct log_device *ldev, struct log_rec *rec)
{
struct log_filter *filt;
if (rec->force_debug)
if (rec->flags & LOGRECF_FORCE_DEBUG)
return true;
/* If there are no filters, filter on the default log level */
@ -245,7 +245,9 @@ int _log(enum log_category_t cat, enum log_level_t level, const char *file,
rec.cat = cat;
rec.level = level & LOGL_LEVEL_MASK;
rec.force_debug = level & LOGL_FORCE_DEBUG;
rec.flags = 0;
if (level & LOGL_FORCE_DEBUG)
rec.flags |= LOGRECF_FORCE_DEBUG;
rec.file = file;
rec.line = line;
rec.func = func;
@ -255,7 +257,8 @@ int _log(enum log_category_t cat, enum log_level_t level, const char *file,
gd->log_drop_count++;
/* display dropped traces with console puts and DEBUG_UART */
if (rec.level <= CONFIG_LOG_DEFAULT_LEVEL || rec.force_debug) {
if (rec.level <= CONFIG_LOG_DEFAULT_LEVEL ||
rec.flags & LOGRECF_FORCE_DEBUG) {
char buf[CONFIG_SYS_CBSIZE];
va_start(args, fmt);

14
include/log.h
View file

@ -322,6 +322,12 @@ void __assert_fail(const char *assertion, const char *file, unsigned int line,
#define log_msg_ret(_msg, _ret) ((void)(_msg), _ret)
#endif
/** * enum log_rec_flags - Flags for a log record */
enum log_rec_flags {
/** @LOGRECF_FORCE_DEBUG: Force output of debug record */
LOGRECF_FORCE_DEBUG = BIT(0),
};
/**
* struct log_rec - a single log record
*
@ -337,18 +343,18 @@ void __assert_fail(const char *assertion, const char *file, unsigned int line,
*
* @cat: Category, representing a uclass or part of U-Boot
* @level: Severity level, less severe is higher
* @force_debug: Force output of debug
* @file: Name of file where the log record was generated (not allocated)
* @line: Line number where the log record was generated
* @flags: Flags for log record (enum log_rec_flags)
* @file: Name of file where the log record was generated (not allocated)
* @func: Function where the log record was generated (not allocated)
* @msg: Log message (allocated)
*/
struct log_rec {
enum log_category_t cat;
enum log_level_t level;
bool force_debug;
u16 line;
u8 flags;
const char *file;
int line;
const char *func;
const char *msg;
};