diff options
Diffstat (limited to 'drivers/bootcount/bootcount_davinci.c')
| -rw-r--r-- | drivers/bootcount/bootcount_davinci.c | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/drivers/bootcount/bootcount_davinci.c b/drivers/bootcount/bootcount_davinci.c new file mode 100644 index 0000000000..1cd943630a --- /dev/null +++ b/drivers/bootcount/bootcount_davinci.c @@ -0,0 +1,49 @@ +/* + * (C) Copyright 2011 + * Heiko Schocher, DENX Software Engineering, hs@denx.de. + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + */ + +#include <bootcount.h> +#include <asm/arch/da850_lowlevel.h> +#include <asm/arch/davinci_misc.h> + +void bootcount_store(ulong a) +{ + struct davinci_rtc *reg = + (struct davinci_rtc *)CONFIG_SYS_BOOTCOUNT_ADDR; + + /* + * write RTC kick register to enable write + * for RTC Scratch registers. Scratch0 and 1 are + * used for bootcount values. + */ + writel(RTC_KICK0R_WE, ®->kick0r); + writel(RTC_KICK1R_WE, ®->kick1r); + raw_bootcount_store(®->scratch0, a); + raw_bootcount_store(®->scratch1, BOOTCOUNT_MAGIC); +} + +ulong bootcount_load(void) +{ + struct davinci_rtc *reg = + (struct davinci_rtc *)CONFIG_SYS_BOOTCOUNT_ADDR; + + if (raw_bootcount_load(®->scratch1) != BOOTCOUNT_MAGIC) + return 0; + else + return raw_bootcount_load(®->scratch0); +} |