diff -r c1f20ce4abcf -r 3e88ff8f41d5 kernel/eka/include/nkernsmp/x86/ncern.h
--- a/kernel/eka/include/nkernsmp/x86/ncern.h	Tue Aug 31 16:34:26 2010 +0300
+++ b/kernel/eka/include/nkernsmp/x86/ncern.h	Wed Sep 01 12:34:56 2010 +0100
@@ -36,6 +36,20 @@
 	{
 	};
 
+/** Timer frequency specification
+
+Stores a frequency as a fraction of a (separately stored) maximum.
+The frequency must be at least 1/256 of the maximum.
+
+@internalTechnology
+@prototype
+*/
+struct STimerMult
+	{
+	TUint32		iFreq;						// frequency as a fraction of maximum possible, multiplied by 2^32
+	TUint32		iInverse;					// 2^24/(iFreq/2^32) = 2^56/iFreq
+	};
+
 /** Variant interface block
 @internalTechnology
 @prototype
@@ -45,9 +59,8 @@
 	TUint64		iMaxCpuClock;				// maximum possible CPU clock frequency on this system
 	TUint32		iTimestampFreq;				// rate at which timestamp increments
 	TUint32		iMaxTimerClock;				// maximum possible local timer clock frequency
-	SRatio*		iTimerFreqR[KMaxCpus];		// timer[i] frequency as a fraction of iMaxTimerClock
-	SRatio*		iCpuFreqR[KMaxCpus];		// CPU[i] frequency as a fraction of iMaxCpuClock
-	SRatio*		iTimestampFreqR;			// timestamp counter frequency as a fraction of
+	volatile STimerMult* iTimerMult[KMaxCpus];	// timer[i] frequency as a fraction of iMaxTimerClock
+	volatile TUint32* iCpuMult[KMaxCpus];	// CPU[i] frequency / iMaxCpuClock * 2^32
 	};
 
 // End of file