i386/libsaio/bios.h

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