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 DEFAULT REL 18 SECTION .text 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 global ASM_PFX(InterruptRedirectionTemplate) 46 ASM_PFX(InterruptRedirectionTemplate): 47 int 0x8 48 DB 0xcf ; IRET 49 nop 50 int 0x9 51 DB 0xcf ; IRET 52 nop 53 int 0xa 54 DB 0xcf ; IRET 55 nop 56 int 0xb 57 DB 0xcf ; IRET 58 nop 59 int 0xc 60 DB 0xcf ; IRET 61 nop 62 int 0xd 63 DB 0xcf ; IRET 64 nop 65 int 0xe 66 DB 0xcf ; IRET 67 nop 68 int 0xf 69 DB 0xcf ; IRET 70 nop 71 72
