mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-17 00:33:06 +00:00
35 lines
781 B
C
35 lines
781 B
C
|
/*
|
||
|
|
* functions for handling bootcount support
|
||
|
|
*
|
||
|
|
* Copyright (c) 2010 Analog Devices Inc.
|
||
|
|
*
|
||
|
|
* Licensed under the 2-clause BSD.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/* This version uses one 32bit storage and combines the magic/count */
|
||
|
|
|
||
|
|
#include <common.h>
|
||
|
|
|
||
|
|
/* We abuse the EVT0 MMR for bootcount storage by default */
|
||
|
|
#ifndef CONFIG_SYS_BOOTCOUNT_ADDR
|
||
|
|
# define CONFIG_SYS_BOOTCOUNT_ADDR EVT0
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#define MAGIC_MASK 0xffff0000
|
||
|
|
#define COUNT_MASK 0x0000ffff
|
||
|
|
|
||
|
|
void bootcount_store(ulong cnt)
|
||
|
|
{
|
||
|
|
ulong magic = (BOOTCOUNT_MAGIC & MAGIC_MASK) | (cnt & COUNT_MASK);
|
||
|
|
bfin_write32(CONFIG_SYS_BOOTCOUNT_ADDR, magic);
|
||
|
|
}
|
||
|
|
|
||
|
|
ulong bootcount_load(void)
|
||
|
|
{
|
||
|
|
ulong magic = bfin_read32(CONFIG_SYS_BOOTCOUNT_ADDR);
|
||
|
|
if ((magic & MAGIC_MASK) == (BOOTCOUNT_MAGIC & MAGIC_MASK))
|
||
|
|
return magic & COUNT_MASK;
|
||
|
|
else
|
||
|
|
return 0;
|
||
|
|
}
|