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log: Add support for logging a buffer

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The print_buffer() function is very useful for debugging. Add a version
of this in the log system also.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass
2021-05-08 07:00:06 -06:00
committed by Tom Rini
parent 0cceb99ac5
commit 58b4b7133a
3 changed files with 92 additions and 0 deletions
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35
include/log.h
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@@ -140,6 +140,24 @@ static inline int _log_nop(enum log_category_t cat, enum log_level_t level,
return 0;
}
/**
* _log_buffer - Internal function to print data buffer in hex and ascii form
*
* @cat: Category of log record (indicating which subsystem generated it)
* @level: Level of log record (indicating its severity)
* @file: File name of file where log record was generated
* @line: Line number in file where log record was generated
* @func: Function where log record was generated
* @addr: Starting address to display at start of line
* @data: pointer to data buffer
* @width: data value width. May be 1, 2, or 4.
* @count: number of values to display
* @linelen: Number of values to print per line; specify 0 for default length
*/
int _log_buffer(enum log_category_t cat, enum log_level_t level,
const char *file, int line, const char *func, ulong addr,
const void *data, uint width, uint count, uint linelen);
/* Define this at the top of a file to add a prefix to debug messages */
#ifndef pr_fmt
#define pr_fmt(fmt) fmt
@@ -200,8 +218,25 @@ static inline int _log_nop(enum log_category_t cat, enum log_level_t level,
__LINE__, __func__, \
pr_fmt(_fmt), ##_args); \
})
/* Emit a dump if the level is less that the maximum */
#define log_buffer(_cat, _level, _addr, _data, _width, _count, _linelen) ({ \
int _l = _level; \
if (_LOG_DEBUG != 0 || _l <= _LOG_MAX_LEVEL) \
_log_buffer((enum log_category_t)(_cat), \
(enum log_level_t)(_l | _LOG_DEBUG), __FILE__, \
__LINE__, __func__, _addr, _data, \
_width, _count, _linelen); \
})
#else
#define log(_cat, _level, _fmt, _args...)
#define log_buffer(_cat, _level, _addr, _data, _width, _count, _linelen) ({ \
int _l = _level; \
if (_LOG_DEBUG != 0 || _l <= LOGL_INFO || \
(_DEBUG && _l == LOGL_DEBUG)) \
print_buffer(_addr, _data, _width, _count, _linelen); \
})
#endif
#define log_nop(_cat, _level, _fmt, _args...) ({ \