1 ;; @file 2 ; Interrupt Redirection Template 3 ; 4 ; Copyright (c) 2016, 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 SECTION .text 18 19 ;---------------------------------------------------------------------------- 20 ; Procedure: InterruptRedirectionTemplate: Redirects interrupts 0x68-0x6F 21 ; 22 ; Input: None 23 ; 24 ; Output: None 25 ; 26 ; Prototype: VOID 27 ; InterruptRedirectionTemplate ( 28 ; VOID 29 ; ); 30 ; 31 ; Saves: None 32 ; 33 ; Modified: None 34 ; 35 ; Description: Contains the code that is copied into low memory (below 640K). 36 ; This code reflects interrupts 0x68-0x6f to interrupts 0x08-0x0f. 37 ; This template must be copied into low memory, and the IDT entries 38 ; 0x68-0x6F must be point to the low memory copy of this code. Each 39 ; entry is 4 bytes long, so IDT entries 0x68-0x6F can be easily 40 ; computed. 41 ; 42 ;---------------------------------------------------------------------------- 43 44 global ASM_PFX(InterruptRedirectionTemplate) 45 ASM_PFX(InterruptRedirectionTemplate): 46 int 0x8 47 DB 0xcf ; IRET 48 nop 49 int 0x9 50 DB 0xcf ; IRET 51 nop 52 int 0xa 53 DB 0xcf ; IRET 54 nop 55 int 0xb 56 DB 0xcf ; IRET 57 nop 58 int 0xc 59 DB 0xcf ; IRET 60 nop 61 int 0xd 62 DB 0xcf ; IRET 63 nop 64 int 0xe 65 DB 0xcf ; IRET 66 nop 67 int 0xf 68 DB 0xcf ; IRET 69 nop 70 71
