From e44e3482bdb4d0ebde2d8b41830ac2cdb07948fb Mon Sep 17 00:00:00 2001 From: Yang Zhang Date: Fri, 28 Aug 2015 09:58:54 +0800 Subject: Add qemu 2.4.0 Change-Id: Ic99cbad4b61f8b127b7dc74d04576c0bcbaaf4f5 Signed-off-by: Yang Zhang --- .../u-boot/drivers/bootcount/bootcount_blackfin.c | 34 ++++++++++++++++++++++ 1 file changed, 34 insertions(+) create mode 100644 qemu/roms/u-boot/drivers/bootcount/bootcount_blackfin.c (limited to 'qemu/roms/u-boot/drivers/bootcount/bootcount_blackfin.c') diff --git a/qemu/roms/u-boot/drivers/bootcount/bootcount_blackfin.c b/qemu/roms/u-boot/drivers/bootcount/bootcount_blackfin.c new file mode 100644 index 000000000..6cf6dd58b --- /dev/null +++ b/qemu/roms/u-boot/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 + +/* 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; +} -- cgit 1.2.3-korg