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authorRob Herring <rob.herring@calxeda.com>2012-02-01 16:57:54 +0000
committerAlbert ARIBAUD <albert.u.boot@aribaud.net>2012-03-28 23:31:20 +0200
commit877012df309329a9264e6e9558d4f71bfa0cddbe (patch)
tree8ed4bc8971b0c4d6c293d415351d325725f25cc9 /arch/arm/cpu/armv7/highbank
parent7b81649a053826dc31804d3260a44ff599a9542a (diff)
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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/arm/cpu/armv7/highbank')
-rw-r--r--arch/arm/cpu/armv7/highbank/Makefile2
-rw-r--r--arch/arm/cpu/armv7/highbank/bootcount.c36
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