diff options
Diffstat (limited to 'EDK/Foundation/Library/EdkIIGlueLib/Library/BaseLib/X64/ReadMsr64.asm')
| -rw-r--r-- | EDK/Foundation/Library/EdkIIGlueLib/Library/BaseLib/X64/ReadMsr64.asm | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/EDK/Foundation/Library/EdkIIGlueLib/Library/BaseLib/X64/ReadMsr64.asm b/EDK/Foundation/Library/EdkIIGlueLib/Library/BaseLib/X64/ReadMsr64.asm new file mode 100644 index 0000000..328c12e --- /dev/null +++ b/EDK/Foundation/Library/EdkIIGlueLib/Library/BaseLib/X64/ReadMsr64.asm @@ -0,0 +1,38 @@ +; Copyright (c) 2004, Intel Corporation +; All rights reserved. This program and the accompanying materials +; are licensed and made available under the terms and conditions of the BSD License +; which accompanies this distribution. The full text of the license may be found at +; http://opensource.org/licenses/bsd-license.php +; +; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, +; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. +; +; Module Name: +; +; ReadMsr64.Asm +; +; Abstract: +; +; AsmReadMsr64 function +; +; Notes: +; +;------------------------------------------------------------------------------ + + .code + +;------------------------------------------------------------------------------ +; UINT64 +; EFIAPI +; AsmReadMsr64 ( +; IN UINT32 Index +; ); +;------------------------------------------------------------------------------ +AsmReadMsr64 PROC + rdmsr ; edx & eax are zero extended + shl rdx, 20h + or rax, rdx + ret +AsmReadMsr64 ENDP + + END |