1 ## @file 2 # Interrupt Redirection Template 3 # 4 # Copyright (c) 2006, Intel Corporation. All rights reserved.<BR> 5 # 6 # This program and the accompanying materials 7 # are licensed and made available under the terms and conditions 8 # of the BSD License which accompanies this distribution. The 9 # full text of the license may be found at 10 # http://opensource.org/licenses/bsd-license.php 11 # 12 # THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 13 # WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 14 # 15 ## 16 17 #text SEGMENT 18 19 20 #---------------------------------------------------------------------------- 21 # Procedure: InterruptRedirectionTemplate: Redirects interrupts 0x68-0x6F 22 # 23 # Input: None 24 # 25 # Output: None 26 # 27 # Prototype: VOID 28 # InterruptRedirectionTemplate ( 29 # VOID 30 # ); 31 # 32 # Saves: None 33 # 34 # Modified: None 35 # 36 # Description: Contains the code that is copied into low memory (below 640K). 37 # This code reflects interrupts 0x68-0x6f to interrupts 0x08-0x0f. 38 # This template must be copied into low memory, and the IDT entries 39 # 0x68-0x6F must be point to the low memory copy of this code. Each 40 # entry is 4 bytes long, so IDT entries 0x68-0x6F can be easily 41 # computed. 42 # 43 #---------------------------------------------------------------------------- 44 45 ASM_GLOBAL ASM_PFX(InterruptRedirectionTemplate) 46 ASM_PFX(InterruptRedirectionTemplate): 47 int $0x08 48 .byte 0x0cf # IRET 49 nop 50 int $0x09 51 .byte 0x0cf # IRET 52 nop 53 int $0x0a 54 .byte 0x0cf # IRET 55 nop 56 int $0x0b 57 .byte 0x0cf # IRET 58 nop 59 int $0x0c 60 .byte 0x0cf # IRET 61 nop 62 int $0x0d 63 .byte 0x0cf # IRET 64 nop 65 int $0x0e 66 .byte 0x0cf # IRET 67 nop 68 int $0x0f 69 .byte 0x0cf # IRET 70 nop 71 72 #END 73
