diff options
Diffstat (limited to 'IntelFrameworkModulePkg/Csm/LegacyBiosDxe/X64/InterruptTable.S')
| -rw-r--r-- | IntelFrameworkModulePkg/Csm/LegacyBiosDxe/X64/InterruptTable.S | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/IntelFrameworkModulePkg/Csm/LegacyBiosDxe/X64/InterruptTable.S b/IntelFrameworkModulePkg/Csm/LegacyBiosDxe/X64/InterruptTable.S new file mode 100644 index 0000000000..95a0888863 --- /dev/null +++ b/IntelFrameworkModulePkg/Csm/LegacyBiosDxe/X64/InterruptTable.S @@ -0,0 +1,72 @@ +## @file +# Interrupt Redirection Template +# +# Copyright (c) 2006, Intel Corporation. All rights reserved.<BR> +# +# 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. +# +## + +#text SEGMENT + + +#---------------------------------------------------------------------------- +# Procedure: InterruptRedirectionTemplate: Redirects interrupts 0x68-0x6F +# +# Input: None +# +# Output: None +# +# Prototype: VOID +# InterruptRedirectionTemplate ( +# VOID +# ); +# +# Saves: None +# +# Modified: None +# +# Description: Contains the code that is copied into low memory (below 640K). +# This code reflects interrupts 0x68-0x6f to interrupts 0x08-0x0f. +# This template must be copied into low memory, and the IDT entries +# 0x68-0x6F must be point to the low memory copy of this code. Each +# entry is 4 bytes long, so IDT entries 0x68-0x6F can be easily +# computed. +# +#---------------------------------------------------------------------------- + +ASM_GLOBAL ASM_PFX(InterruptRedirectionTemplate) +ASM_PFX(InterruptRedirectionTemplate): + int $0x08 + .byte 0x0cf # IRET + nop + int $0x09 + .byte 0x0cf # IRET + nop + int $0x0a + .byte 0x0cf # IRET + nop + int $0x0b + .byte 0x0cf # IRET + nop + int $0x0c + .byte 0x0cf # IRET + nop + int $0x0d + .byte 0x0cf # IRET + nop + int $0x0e + .byte 0x0cf # IRET + nop + int $0x0f + .byte 0x0cf # IRET + nop + +#END |