u-boot/cpu/blackfin/os_log.c
Mike Frysinger 909878fd3f Blackfin: add os log functions
Part of the mini Blackfin ABI with operating systems is that they can use
0x4f0-0x4f8 to pass log buffers to/from bootloaders.  So add support to
U-Boot for reading the log buffer.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-07-18 21:15:50 -04:00

30 lines
539 B
C

/*
* functions for handling OS log buffer
*
* Copyright (c) 2009 Analog Devices Inc.
*
* Licensed under the 2-clause BSD.
*/
#include <common.h>
#define OS_LOG_MAGIC 0xDEADBEEF
#define OS_LOG_MAGIC_ADDR ((unsigned long *)0x4f0)
#define OS_LOG_PTR_ADDR ((char **)0x4f4)
bool bfin_os_log_check(void)
{
if (*OS_LOG_MAGIC_ADDR != OS_LOG_MAGIC)
return false;
*OS_LOG_MAGIC_ADDR = 0;
return true;
}
void bfin_os_log_dump(void)
{
char *log = *OS_LOG_PTR_ADDR;
while (*log) {
puts(log);
log += strlen(log) + 1;
}
}