Cherry-pick vboot_reference files from TOT to support crossystem

firmware/include/utility.h

Index: firmware/include/utility.h
diff --git a/firmware/include/utility.h b/firmware/include/utility.h
index 3c4a3bb5017b3c3d45c9d71c130118c649e62835..4f88ab9cf5d8a0938a2018b168062bbb3fddd13d 100644
--- a/firmware/include/utility.h
+++ b/firmware/include/utility.h
@@ -96,4 +96,18 @@ int SafeMemcmp(const void* s1, const void* s2, size_t n);
 #define memset _do_not_use_standard_memset
 #endif
 
+/* Read a high-resolution timer. */
+uint64_t VbGetTimer(void);
+
+/* Return the maximum frequency for the high-resolution timer, in Hz.
+ *
+ * Note that this call MUST be fast; the implementation must not
+ * attempt to actually measure the frequency.  This function need only
+ * return an upper bound for the timer frequency, so that minimum
+ * delays can be established.  For example, if the same BIOS can run
+ * on CPUs where the timer frequency varies between 1.2GHz and 1.8GHz,
+ * return 1800000000 (or even 2000000000). */
+uint64_t VbGetTimerMaxFreq(void);
+
+
 #endif  /* VBOOT_REFERENCE_UTILITY_H_ */