diff options
| -rw-r--r-- | UefiCpuPkg/Library/MtrrLib/MtrrLib.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/UefiCpuPkg/Library/MtrrLib/MtrrLib.c b/UefiCpuPkg/Library/MtrrLib/MtrrLib.c index 1f2604ab8b..fca9258ed7 100644 --- a/UefiCpuPkg/Library/MtrrLib/MtrrLib.c +++ b/UefiCpuPkg/Library/MtrrLib/MtrrLib.c @@ -93,11 +93,16 @@ GetVariableMtrrCount ( VOID
)
{
+ UINT32 VariableMtrrCount;
+
if (!IsMtrrSupported ()) {
return 0;
}
- return (UINT32)(AsmReadMsr64 (MTRR_LIB_IA32_MTRR_CAP) & MTRR_LIB_IA32_MTRR_CAP_VCNT_MASK);
+ VariableMtrrCount = (UINT32)(AsmReadMsr64 (MTRR_LIB_IA32_MTRR_CAP) & MTRR_LIB_IA32_MTRR_CAP_VCNT_MASK);
+ ASSERT (VariableMtrrCount <= MTRR_NUMBER_OF_VARIABLE_MTRR);
+
+ return VariableMtrrCount;
}
/**
|