1 files changed, 20 insertions, 0 deletions
diff --git a/src/soc/intel/apollolake/tsc_freq.c b/src/soc/intel/apollolake/tsc_freq.c
new file mode 100644
index 0000000000..b6320eda8f
--- /dev/null
+++ b/src/soc/intel/apollolake/tsc_freq.c
@@ -0,0 +1,20 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2015 Intel Corp.
+ *
+ * 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.
+ */
+
+#include <cpu/x86/msr.h>
+#include <cpu/x86/tsc.h>
+#include <soc/cpu.h>
+
+unsigned long tsc_freq_mhz(void)
+{
+    msr_t msr = rdmsr(MSR_PLATFORM_INFO);
+    return (BASE_CLOCK_MHZ * ((msr.lo >> 8) & 0xff));
+}