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-rw-r--r--src/include/cpu/intel/fsb.h30
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diff --git a/src/include/cpu/intel/fsb.h b/src/include/cpu/intel/fsb.h
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+++ b/src/include/cpu/intel/fsb.h
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+/*
+ * This file is part of the coreboot project.
+ *
+ * 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.
+ */
+
+#ifndef CPU_INTEL_FSB_H
+#define CPU_INTEL_FSB_H
+
+/*
+ * This function returns:
+ * the system bus speed value in MHz
+ * -1 if FSB is not found
+ * -2 if the CPU is not supported
+ */
+int get_ia32_fsb(void);
+
+/*
+ * This function returns round up 3 * get_ia32_fsb()
+ */
+int get_ia32_fsb_x3(void);
+
+#endif /* CPU_INTEL_FSB_H */