diff options
Diffstat (limited to 'EdkCompatibilityPkg/Foundation/Library/Pei/PeiLib/ia32/WriteIdt.asm')
-rw-r--r-- | EdkCompatibilityPkg/Foundation/Library/Pei/PeiLib/ia32/WriteIdt.asm | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/EdkCompatibilityPkg/Foundation/Library/Pei/PeiLib/ia32/WriteIdt.asm b/EdkCompatibilityPkg/Foundation/Library/Pei/PeiLib/ia32/WriteIdt.asm new file mode 100644 index 0000000000..c4634996fc --- /dev/null +++ b/EdkCompatibilityPkg/Foundation/Library/Pei/PeiLib/ia32/WriteIdt.asm @@ -0,0 +1,49 @@ +;------------------------------------------------------------------------------
+;
+; Copyright (c) 2006, 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:
+;
+; WriteIdt.Asm
+;
+; Abstract:
+;
+; SetIdtBase function
+;
+; Notes:
+;
+;------------------------------------------------------------------------------
+
+ .586p
+ .model flat,C
+ .mmx
+ .code
+
+;------------------------------------------------------------------------------
+; void
+; SetIdtBase (
+; UINT32 IdtBase,
+; UINT16 IdtLimit
+; )
+;
+; Abstract: Set IDTR with the given physical address
+;
+SetIdtBase PROC C PUBLIC IdtBase:DWORD, IdtLimit:WORD
+ LOCAL IdtrBuf:FWORD
+
+ mov eax, IdtBase
+ mov cx, IdtLimit
+ mov DWORD PTR IdtrBuf + 2, eax ; write IDT base address
+ mov WORD PTR IdtrBuf, cx ; write ITD limit
+ lidt FWORD PTR IdtrBuf
+ ret
+SetIdtBase ENDP
+
+ END
\ No newline at end of file |