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/*
* 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;
}
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