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>

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)

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

board/highbank/highbank.c

@@ -21,6 +21,7 @@
 #include <scsi.h>
 
 #include <asm/sizes.h>
+#include <asm/io.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 

include/configs/highbank.h

@@ -41,6 +41,9 @@
 #define CONFIG_BAUDRATE			38400
 #define CONFIG_SYS_BAUDRATE_TABLE	{ 9600, 19200, 38400, 57600, 115200 }
 
+#define CONFIG_BOOTCOUNT_LIMIT
+#define CONFIG_SYS_BOOTCOUNT_ADDR	0xfff3cf0c
+
 #define CONFIG_MISC_INIT_R
 #define CONFIG_SCSI_AHCI
 #define CONFIG_SCSI_AHCI_PLAT