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Annotation of 43BSDTahoe/sys/stand/saio.h, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 1982, 1988 The Regents of the University of California.
                      3:  * All rights reserved.
                      4:  *
                      5:  * Redistribution and use in source and binary forms are permitted
                      6:  * provided that the above copyright notice and this paragraph are
                      7:  * duplicated in all such forms and that any documentation,
                      8:  * advertising materials, and other materials related to such
                      9:  * distribution and use acknowledge that the software was developed
                     10:  * by the University of California, Berkeley.  The name of the
                     11:  * University may not be used to endorse or promote products derived
                     12:  * from this software without specific prior written permission.
                     13:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
                     14:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
                     15:  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
                     16:  *
                     17:  *     @(#)saio.h      7.6 (Berkeley) 5/23/89
                     18:  */
                     19: 
                     20: #include "saioctl.h"
                     21: #include "saerrno.h"
                     22: 
                     23: #define        UNIX    "hd(6,0,0) /vmunix"
                     24: #define        NULL    0
                     25: 
                     26: /*
                     27:  * Io block: includes an inode, cells for the use of seek, etc.,
                     28:  * and a buffer.
                     29:  */
                     30: struct iob {
                     31:        int     i_flgs;         /* see F_ below */
                     32:        int     i_adapt;        /* adapter or bus */
                     33:        int     i_ctlr;         /* controller */
                     34:        int     i_unit;         /* pseudo device unit */
                     35:        int     i_part;         /* disk partition */
                     36:        daddr_t i_boff;         /* block offset on device */
                     37:        struct  inode i_ino;    /* inode, if file */
                     38:        daddr_t i_cyloff;       /* cylinder offset on device */
                     39:        off_t   i_offset;       /* seek offset in file */
                     40:        daddr_t i_bn;           /* 1st block # of next read */
                     41:        char    *i_ma;          /* memory address of i/o buffer */
                     42:        int     i_cc;           /* character count of transfer */
                     43:        int     i_error;        /* error # return */
                     44:        int     i_errcnt;       /* error count for driver retries */
                     45:        int     i_errblk;       /* block # in error for error reporting */
                     46:        char    i_buf[MAXBSIZE];/* i/o buffer */
                     47:        union {
                     48:                struct fs ui_fs;        /* file system super block info */
                     49:                char dummy[SBSIZE];
                     50:        } i_un;
                     51: };
                     52: 
                     53: #define        i_fs    i_un.ui_fs
                     54: #define        i_bus   i_adapt
                     55: 
                     56: /* codes for sector header word 1 */
                     57: #define        HDR1_FMT22      0x1000  /* standard 16 bit format */
                     58: #define        HDR1_OKSCT      0xc000  /* sector ok */
                     59: #define        HDR1_SSF        0x2000  /* skip sector flag */
                     60: 
                     61: #define        F_READ          0x0001  /* file opened for reading */
                     62: #define        F_WRITE         0x0002  /* file opened for writing */
                     63: #define        F_ALLOC         0x0004  /* buffer allocated */
                     64: #define        F_FILE          0x0008  /* file instead of device */
                     65: #define        F_NBSF          0x0010  /* no bad sector forwarding */
                     66: #define        F_ECCLM         0x0020  /* limit # of bits in ecc correction */
                     67: #define        F_SSI           0x0040  /* set skip sector inhibit */
                     68: #define        F_SEVRE         0x0080  /* Severe burnin (no retries, no ECC) */
                     69: 
                     70: /* io types */
                     71: #define        F_RDDATA        0x0100  /* read data */
                     72: #define        F_WRDATA        0x0200  /* write data */
                     73: #define        F_HDR           0x0400  /* include header on next i/o */
                     74: #define        F_CHECK         0x0800  /* perform check of data read/write */
                     75: #define        F_HCHECK        0x1000  /* perform check of header and data */
                     76: 
                     77: #define        F_TYPEMASK      0xff00
                     78: 
                     79: #define        READ    F_READ
                     80: #define        WRITE   F_WRITE
                     81: 
                     82: /*
                     83:  * Lseek call.
                     84:  */
                     85: #define        L_SET           0       /* absolute offset */
                     86: 
                     87: /*
                     88:  * Device switch.
                     89:  */
                     90: struct devsw {
                     91:        char    *dv_name;
                     92:        int     (*dv_strategy)();
                     93:        int     (*dv_open)();
                     94:        int     (*dv_close)();
                     95:        int     (*dv_ioctl)();
                     96: };
                     97: 
                     98: extern struct devsw devsw[];   /* device array */
                     99: extern int ndevs;              /* number of elements in devsw[] */
                    100: 
                    101: #ifdef COMPAT_42
                    102: /*
                    103:  * Old drive description table.
                    104:  * still used by some drivers for now.
                    105:  */
                    106: struct st {
                    107:        short   nsect;          /* # sectors/track */
                    108:        short   ntrak;          /* # tracks/surfaces/heads */
                    109:        short   nspc;           /* # sectors/cylinder */
                    110:        short   ncyl;           /* # cylinders */
                    111:        short   *off;           /* partition offset table (cylinders) */
                    112: };
                    113: #endif
                    114: 
                    115: #define        NFILES  4
                    116: extern struct  iob iob[NFILES];

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