diff options
| author |   Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com> | 2023-10-10 14:33:42 +0000 |
|---|---|---|
| committer | Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com> | 2023-10-10 14:33:42 +0000 |
| commit | af1a266670d040d2f4083ff309d732d648afba2a (patch) | |
| tree | 2fc46203448ddcc6f81546d379abfaeb323575e9 /roms/edk2/MdePkg/Library/BaseLib/Ia32/ReadMsr64.c | |
| parent | e02cda008591317b1625707ff8e115a4841aa889 (diff) | |
Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec
Diffstat (limited to 'roms/edk2/MdePkg/Library/BaseLib/Ia32/ReadMsr64.c')
| -rw-r--r-- | roms/edk2/MdePkg/Library/BaseLib/Ia32/ReadMsr64.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/roms/edk2/MdePkg/Library/BaseLib/Ia32/ReadMsr64.c b/roms/edk2/MdePkg/Library/BaseLib/Ia32/ReadMsr64.c new file mode 100644 index 000000000..6d2394b1a --- /dev/null +++ b/roms/edk2/MdePkg/Library/BaseLib/Ia32/ReadMsr64.c @@ -0,0 +1,37 @@ +/** @file
+ AsmReadMsr64 function
+
+ Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+
+
+
+/**
+ Returns a 64-bit Machine Specific Register(MSR).
+
+ Reads and returns the 64-bit MSR specified by Index. No parameter checking is
+ performed on Index, and some Index values may cause CPU exceptions. The
+ caller must either guarantee that Index is valid, or the caller must set up
+ exception handlers to catch the exceptions. This function is only available
+ on IA-32 and x64.
+
+ @param Index The 32-bit MSR index to read.
+
+ @return The value of the MSR identified by Index.
+
+**/
+UINT64
+EFIAPI
+AsmReadMsr64 (
+ IN UINT32 Index
+ )
+{
+ _asm {
+ mov ecx, Index
+ rdmsr
+ }
+}
+
|