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