diff options
Diffstat (limited to 'MdePkg/Library/BaseLib/X86Msr.c')
| -rw-r--r-- | MdePkg/Library/BaseLib/X86Msr.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/MdePkg/Library/BaseLib/X86Msr.c b/MdePkg/Library/BaseLib/X86Msr.c index 612b29c0e6..410ab2eb9e 100644 --- a/MdePkg/Library/BaseLib/X86Msr.c +++ b/MdePkg/Library/BaseLib/X86Msr.c @@ -40,7 +40,8 @@ AsmReadMsr32 ( }
/**
- Zero-extend a 32-bit value and writes it to a Machine Specific Register(MSR).
+ Writes a 32-bit value to a Machine Specific Register(MSR), and returns the value.
+ The upper 32-bits of the MSR are set to zero.
Writes the 32-bit value specified by Value to the MSR specified by Index. The
upper 32-bits of the MSR write are set to zero. The 32-bit value written to
@@ -192,7 +193,7 @@ AsmMsrBitFieldRead32 ( /**
Writes a bit field to an MSR.
- Writes Value to a bit field in the lower 32-bits of a 64-bit MSR. The bit
+ Writes Value to a bit field in the lower 32-bits of a 64-bit MSR. The bit
field is specified by the StartBit and the EndBit. All other bits in the
destination MSR are preserved. The lower 32-bits of the MSR written is
returned. The caller must either guarantee that Index and the data written
@@ -464,7 +465,7 @@ AsmMsrAndThenOr64 ( @param EndBit The ordinal of the most significant bit in the bit field.
Range 0..63.
- @return The value written back to the MSR.
+ @return The value read from the MSR.
**/
UINT64
|