i386/libsaio/bios.h

   1 /*
   2  * Copyright (c) 1999-2003 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Portions Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights
   7  * Reserved.  This file contains Original Code and/or Modifications of
   8  * Original Code as defined in and that are subject to the Apple Public
   9  * Source License Version 2.0 (the "License").  You may not use this file
  10  * except in compliance with the License.  Please obtain a copy of the
  11  * License at http://www.apple.com/publicsource and read it before using
  12  * this file.
  13  *
  14  * The Original Code and all software distributed under the License are
  15  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  16  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  17  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE OR NON- INFRINGEMENT.  Please see the
  19  * License for the specific language governing rights and limitations
  20  * under the License.
  21  *
  22  * @APPLE_LICENSE_HEADER_END@
  23  */
  24 /*
  25  * Copyright 1994 NeXT Computer, Inc.
  26  * All rights reserved.
  27  */
  28
  29 #ifndef __LIBSAIO_BIOS_H
  30 #define __LIBSAIO_BIOS_H
  31
  32 #include <pexpert/i386/boot.h>
  33
  34 typedef union {
  35     unsigned int      rx;
  36     unsigned short    rr;
  37     struct {
  38         unsigned char l;
  39         unsigned char h;
  40     } r;
  41 } machineRegister_t;
  42
  43 typedef struct {
  44     unsigned short cf  :1;
  45     unsigned short     :1;
  46     unsigned short pf  :1;
  47     unsigned short     :1;
  48     unsigned short af  :1;
  49     unsigned short     :1;
  50     unsigned short zf  :1;
  51     unsigned short sf  :1;
  52     unsigned short tf  :1;
  53     unsigned short _if :1;
  54     unsigned short df  :1;
  55     unsigned short of  :1;
  56     unsigned short iopl:2;
  57     unsigned short nt  :1;
  58 } machineFlags_t;
  59
  60 typedef struct {
  61     unsigned int      intno;
  62     machineRegister_t eax;
  63     machineRegister_t ebx;
  64     machineRegister_t ecx;
  65     machineRegister_t edx;
  66     machineRegister_t edi;
  67     machineRegister_t esi;
  68     machineRegister_t ebp;
  69     unsigned short    cs;
  70     unsigned short    ds;
  71     unsigned short    es;
  72     machineFlags_t    flags;
  73 } biosBuf_t;
  74
  75 #define EBIOS_FIXED_DISK_ACCESS   0x01
  76 #define EBIOS_LOCKING_ACCESS      0x02
  77 #define EBIOS_ENHANCED_DRIVE_INFO 0x04
  78
  79 #define BASE_HD_DRIVE 0x80
  80
  81 #endif /* !__LIBSAIO_BIOS_H */