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UefiCpuPkg/MtrrLib: Remove the loop of calculating byte offset in MSR 

Calculate byte offset in MSR directly and removing the loop.

Cc: Feng Tian <feng.tian@intel.com>
Cc: Michael Kinney <michael.d.kinney@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jeff Fan <jeff.fan@intel.com>
Reviewed-by: Feng Tian <feng.tian@intel.com>
This commit is contained in:
Jeff Fan 2016-04-20 16:58:24 +08:00
parent 0f35412232
commit aaa1e579a5
1 changed files with 3 additions and 11 deletions
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14
UefiCpuPkg/Library/MtrrLib/MtrrLib.c
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@ -486,18 +486,10 @@ ProgramFixedMtrr (
// //
// We found the fixed MTRR to be programmed // We found the fixed MTRR to be programmed
// //
for (ByteShift = 0; ByteShift < 8; ByteShift++) { ByteShift = ((UINT32)*Base - mMtrrLibFixedMtrrTable[MsrNum].BaseAddress)
if (*Base == / mMtrrLibFixedMtrrTable[MsrNum].Length;
(
mMtrrLibFixedMtrrTable[MsrNum].BaseAddress +
(ByteShift * mMtrrLibFixedMtrrTable[MsrNum].Length)
)
) {
break;
}
}
if (ByteShift == 8) { if (ByteShift >= 8) {
return RETURN_UNSUPPORTED; return RETURN_UNSUPPORTED;
} }