3 files changed, 58 insertions, 1 deletions
diff --git a/src/arch/arm64/armv8/lib/Makefile.inc b/src/arch/arm64/armv8/lib/Makefile.inc
index bda203b0d5..3e393bbe23 100644
--- a/src/arch/arm64/armv8/lib/Makefile.inc
+++ b/src/arch/arm64/armv8/lib/Makefile.inc
@@ -20,7 +20,7 @@
 ##
 ################################################################################
 
-lib_access = pstate.c sysctrl.c cache.c tlb.c misc.c
+lib_access = pstate.c sysctrl.c cache.c tlb.c misc.c clock.c
 
 ifeq ($(CONFIG_ARCH_BOOTBLOCK_ARMV8_64),y)
 bootblock-y += $(lib_access)
diff --git a/src/arch/arm64/armv8/lib/clock.c b/src/arch/arm64/armv8/lib/clock.c
new file mode 100644
index 0000000000..00c9208e5e
--- /dev/null
+++ b/src/arch/arm64/armv8/lib/clock.c
@@ -0,0 +1,32 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2014 Google 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; version 2 of
+ * the License.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
+ * MA 02110-1301 USA
+ *
+ * clock.c: Functions for accessing clock and timer related registers
+ * Reference: ARM Architecture Reference Manual, ARMv8-A edition
+ */
+
+#include <stdint.h>
+
+#include <arch/clock.h>
+
+void set_cntfrq(uint32_t freq)
+{
+	__asm__ __volatile__("msr cntfrq_el0, %0" :: "r"(freq));
+}
diff --git a/src/arch/arm64/include/arch/clock.h b/src/arch/arm64/include/arch/clock.h
new file mode 100644
index 0000000000..a11fbd4999
--- /dev/null
+++ b/src/arch/arm64/include/arch/clock.h
@@ -0,0 +1,25 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2014 Google 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; version 2 of the License.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef __ARM_CLOCK_H_
+#define __ARM_CLOCK_H_
+
+void set_cntfrq(uint32_t);
+
+#endif //__ARM_CLOCK_H_