i386/libsaio/saio.h

   1 /*
   2  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Portions Copyright (c) 1999 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 1.1 (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  * Mach Operating System
  26  * Copyright (c) 1990 Carnegie-Mellon University
  27  * Copyright (c) 1989 Carnegie-Mellon University
  28  * Copyright (c) 1988 Carnegie-Mellon University
  29  * All rights reserved.  The CMU software License Agreement specifies
  30  * the terms and conditions for use and redistribution.
  31  *
  32  */
  33 /*
  34  * Copyright (c) 1982, 1986 Regents of the University of California.
  35  * All rights reserved.  The Berkeley software License Agreement
  36  * specifies the terms and conditions for redistribution.
  37  *
  38  *  @(#)saio.h  7.1 (Berkeley) 6/5/86
  39  */
  40
  41 #ifndef __LIBSAIO_SAIO_H
  42 #define __LIBSAIO_SAIO_H
  43
  44 #include <sys/types.h>
  45 #include <sys/param.h>
  46 #include <sys/vnode.h>
  47 #include <ufs/ufs/quota.h>
  48 #include <ufs/ufs/inode.h>
  49
  50 /*
  51  * Io block: includes an inode, cells for the use of seek, etc,
  52  * and a buffer.
  53  */
  54 struct  iob {
  55     int             i_flgs;        /* see F_ below */
  56     struct inode    i_ino;         /* inode, if file */
  57     daddr_t         i_boff;        /* block offset on device */
  58     unsigned int    i_offset;      /* seek offset in file */
  59     daddr_t         i_bn;          /* 1st block # of next read */
  60     char *          i_ma;          /* memory address of i/o buffer */
  61     int             i_cc;          /* character count of transfer */
  62     int             i_error;       /* error # return */
  63     char *          i_buf;         /* i/o buffer */
  64     struct fs *     i_ffs;         /* file system super block info */
  65     int             biosdev;       /* bios device for file, i_ino inadequate */
  66     daddr_t         dirbuf_blkno;  /* blk of currently buffered dir */
  67     int             partition;     /* which partition */
  68 };
  69
  70 struct dirstuff {
  71     int          loc;
  72     struct iob * io;
  73 };
  74
  75 #define F_READ      0x1            /* file opened for reading */
  76 #define F_WRITE     0x2            /* file opened for writing */
  77 #define F_ALLOC     0x4            /* buffer allocated */
  78 #define F_FILE      0x8            /* file instead of device */
  79 #define F_NBSF      0x10           /* no bad sector forwarding */
  80 #define F_SSI       0x40           /* set skip sector inhibit */
  81 #define F_MEM       0x80           /* memory instead of file or device */
  82
  83 /* IO types */
  84 #define F_RDDATA    0x0100         /* read data */
  85 #define F_WRDATA    0x0200         /* write data */
  86 #define F_HDR       0x0400         /* include header on next i/o */
  87
  88 #define F_TYPEMASK  0xff00
  89
  90 extern char * devsw[];
  91
  92 /*
  93  * Request codes. Must be the same a F_XXX above
  94  */
  95 #define READ    1
  96 #define WRITE   2
  97
  98 #define NBUFS   4
  99 extern char *   b[NBUFS];
 100 extern daddr_t  blknos[NBUFS];
 101
 102 #define NFILES  6
 103 extern struct   iob iob[NFILES];
 104
 105 /* Error codes */
 106 #define EBADF   1   /* bad file descriptor */
 107 #define EOFFSET 2   /* relative seek not supported */
 108 #define EDEV    3   /* improper device specification on open */
 109 #define ENXIO   4   /* unknown device specified */
 110 #define ESRCH   6   /* directory search for file failed */
 111 #define EIO     7   /* generic error */
 112 #define ECMD    10  /* undefined driver command */
 113 #define EBSE    11  /* bad sector error */
 114 #define EWCK    12  /* write check error */
 115 #define EECC    13  /* uncorrectable ecc error */
 116 #define EHER    14  /* hard error */
 117
 118 #define BIOS_DEV_FLOPPY  0x0
 119 #define BIOS_DEV_HD      0x80
 120 #define BIOS_DEV_WIN     BIOS_DEV_HD
 121 #define BIOS_DEV_EN      0xff   /* not really a BIOS device number */
 122
 123 #define DEV_SD      0
 124 #define DEV_HD      1
 125 #define DEV_FLOPPY  2
 126 #define DEV_EN      3
 127
 128 #define BIOSDEV(dev)    ((dev) == DEV_FLOPPY ? BIOS_DEV_FLOPPY : BIOS_DEV_WIN)
 129
 130 #define NSECS   16  /* number of buffered 512 byte sectors */
 131
 132 #define Dev(x)          (((x)>>B_TYPESHIFT)&B_TYPEMASK)
 133
 134 #ifndef max
 135 #define max(a,b) ((a) > (b) ? (a) : (b))
 136 #endif
 137
 138 #ifndef min
 139 #define min(a,b) ((a) < (b) ? (a) : (b))
 140 #endif
 141
 142 #endif /* !__LIBSAIO_SAIO_H */