From 877012df309329a9264e6e9558d4f71bfa0cddbe Mon Sep 17 00:00:00 2001 From: Rob Herring Date: Wed, 1 Feb 2012 16:57:54 +0000 Subject: ARM: highbank: Add boot counter support Add boot counter support using an sysreg which is persistent across reset. Signed-off-by: Rob Herring --- arch/arm/cpu/armv7/highbank/bootcount.c | 36 +++++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) create mode 100644 arch/arm/cpu/armv7/highbank/bootcount.c (limited to 'arch/arm/cpu/armv7/highbank/bootcount.c') diff --git a/arch/arm/cpu/armv7/highbank/bootcount.c b/arch/arm/cpu/armv7/highbank/bootcount.c new file mode 100644 index 0000000000..9ca06567a8 --- /dev/null +++ b/arch/arm/cpu/armv7/highbank/bootcount.c @@ -0,0 +1,36 @@ +/* + * Copyright 2011 Calxeda, Inc. + * + * 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 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. + * + * You should have received a copy of the GNU General Public License along with + * this program. If not, see . + */ + +#include +#include + +#ifdef CONFIG_BOOTCOUNT_LIMIT +void bootcount_store(ulong a) +{ + writel((BOOTCOUNT_MAGIC & 0xffff0000) | a, CONFIG_SYS_BOOTCOUNT_ADDR); +} + +ulong bootcount_load(void) +{ + u32 tmp = readl(CONFIG_SYS_BOOTCOUNT_ADDR); + + if ((tmp & 0xffff0000) != (BOOTCOUNT_MAGIC & 0xffff0000)) + return 0; + else + return tmp & 0x0000ffff; +} +#endif -- cgit