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| author | Rob Herring <rob.herring@calxeda.com> | 2012-02-01 16:57:54 +0000 |
|---|---|---|
| committer | Albert ARIBAUD <albert.u.boot@aribaud.net> | 2012-03-28 23:31:20 +0200 |
| commit | 877012df309329a9264e6e9558d4f71bfa0cddbe (patch) | |
| tree | 8ed4bc8971b0c4d6c293d415351d325725f25cc9 /arch | |
| parent | 7b81649a053826dc31804d3260a44ff599a9542a (diff) | |
| download | u-boot-imx-877012df309329a9264e6e9558d4f71bfa0cddbe.zip u-boot-imx-877012df309329a9264e6e9558d4f71bfa0cddbe.tar.gz u-boot-imx-877012df309329a9264e6e9558d4f71bfa0cddbe.tar.bz2 | |
ARM: highbank: Add boot counter support
Add boot counter support using an sysreg which is persistent across reset.
Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/cpu/armv7/highbank/Makefile | 2 | ||||
| -rw-r--r-- | arch/arm/cpu/armv7/highbank/bootcount.c | 36 |
2 files changed, 37 insertions, 1 deletions
diff --git a/arch/arm/cpu/armv7/highbank/Makefile b/arch/arm/cpu/armv7/highbank/Makefile index 76faeb0..917c3a3 100644 --- a/arch/arm/cpu/armv7/highbank/Makefile +++ b/arch/arm/cpu/armv7/highbank/Makefile @@ -25,7 +25,7 @@ include $(TOPDIR)/config.mk LIB = $(obj)lib$(SOC).o -COBJS := timer.o +COBJS := timer.o bootcount.o SOBJS := SRCS := $(SOBJS:.o=.S) $(COBJS:.o=.c) diff --git a/arch/arm/cpu/armv7/highbank/bootcount.c b/arch/arm/cpu/armv7/highbank/bootcount.c new file mode 100644 index 0000000..9ca0656 --- /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 <http://www.gnu.org/licenses/>. + */ + +#include <common.h> +#include <asm/io.h> + +#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 |