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-rw-r--r--MdePkg/Library/BaseLib/X64/Thunk16.asm3
1 files changed, 3 insertions, 0 deletions
diff --git a/MdePkg/Library/BaseLib/X64/Thunk16.asm b/MdePkg/Library/BaseLib/X64/Thunk16.asm
index 7495ebe2c8..23450ed81b 100644
--- a/MdePkg/Library/BaseLib/X64/Thunk16.asm
+++ b/MdePkg/Library/BaseLib/X64/Thunk16.asm
@@ -26,6 +26,9 @@ EXTERNDEF m16Gdt:WORD
EXTERNDEF m16GdtrBase:WORD
EXTERNDEF mTransition:WORD
+THUNK_ATTRIBUTE_DISABLE_A20_MASK_INT_15 EQU 2
+THUNK_ATTRIBUTE_DISABLE_A20_MASK_KBD_CTRL EQU 4
+
IA32_REGS STRUC 4t
_EDI DD ?
_ESI DD ?