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| author | Stefan Roese <sr@denx.de> | 2012-08-16 17:55:41 +0000 |
|---|---|---|
| committer | Wolfgang Denk <wd@denx.de> | 2012-09-01 14:26:02 +0200 |
| commit | 0044c42e94ecc258728190919b4619508fb83089 (patch) | |
| tree | 4964b48f60ad93a2b77a76104b0ca9f664bde3b3 /drivers/bootcount/bootcount_blackfin.c | |
| parent | 7fe7701d322e9147c06d68ad6ebef91289b9a57e (diff) | |
| download | u-boot-imx-0044c42e94ecc258728190919b4619508fb83089.zip u-boot-imx-0044c42e94ecc258728190919b4619508fb83089.tar.gz u-boot-imx-0044c42e94ecc258728190919b4619508fb83089.tar.bz2 | |
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>
Diffstat (limited to 'drivers/bootcount/bootcount_blackfin.c')
| -rw-r--r-- | drivers/bootcount/bootcount_blackfin.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/drivers/bootcount/bootcount_blackfin.c b/drivers/bootcount/bootcount_blackfin.c new file mode 100644 index 0000000..6cf6dd5 --- /dev/null +++ b/drivers/bootcount/bootcount_blackfin.c @@ -0,0 +1,34 @@ +/* + * 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; +} |