u-boot/drivers/bootcount/bootcount_blackfin.c
Stefan Roese 0044c42e94 Consolidate bootcount code into drivers/bootcount
This patch moves all bootcount implementations into a common
directory: drivers/bootcount. The generic bootcount driver
is now usable not only by powerpc platforms, but others as well.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Heiko Schocher <hs@denx.de>
Cc: Valentin Longchamp <valentin.longchamp@keymile.com>
Cc: Christian Riesch <christian.riesch@omicron.at>
Cc: Manfred Rudigier <manfred.rudigier@omicron.at>
Cc: Mike Frysinger <vapier@gentoo.org>
Cc: Rob Herring <rob.herring@calxeda.com>
Cc: Reinhard Meyer <reinhard.meyer@emk-elektronik.de>
Tested-by: Valentin Longchamp <valentin.longchamp@keymile.com>
Tested-by: Christian Riesch <christian.riesch@omicron.at>
Acked-by: Rob Herring <rob.herring@calxeda.com>
Acked-by: Mike Frysinger <vapier@gentoo.org>
2012-09-01 14:26:02 +02:00

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;
}