usr/src/sys/stand.att/saio.h

/*      saio.h  4.9     %G%     */

/*
 * header file for standalone package
 */

/*
 * io block: includes an
 * inode, cells for the use of seek, etc,
 * and a buffer.
 */
struct  iob {
        int     i_flgs;
        struct  inode i_ino;
        int     i_unit;
        daddr_t i_boff;
        daddr_t i_cyloff;
        off_t   i_offset;
        daddr_t i_bn;
        char    *i_ma;
        int     i_cc;
        int     i_error;
        int     i_errcnt;
        int     i_errblk;
        int     i_active;
        char    i_buf[MAXBSIZE];
        union {
                struct fs ui_fs;
                char dummy[SBSIZE];
        } i_un;
};
#define i_fs i_un.ui_fs
#define NULL 0

#define F_READ          0x1     /* file opened for reading */
#define F_WRITE         0x2     /* file opened for writing */
#define F_ALLOC         0x4     /* buffer allocated */
#define F_FILE          0x8     /* file instead of device */
#define F_NBSF          0x10    /* no bad sector forwarding */
#define F_ECCLM         0x20    /* limit the number of bad bits accepted in ecc's */
/* io types */
#define F_RDDATA        0x0100  /* read data */
#define F_WRDATA        0x0200  /* write data */
#define F_HDR           0x0400  /* include header on next i/o */
#define F_CHECK         0x0800  /* perform check of data read/write */
#define F_HCHECK        0x1000  /* perform check of header and data */

#define F_TYPEMASK      0xff00

/*
 * dev switch
 */
struct devsw {
        char    *dv_name;
        int     (*dv_strategy)();
        int     (*dv_open)();
        int     (*dv_close)();
        int     (*dv_ioctl)();
};

struct devsw devsw[];

struct st {
        short   nsect;  /* number of sectors per track */
        short   ntrak;  /* number of tracks/surfaces/heads... */
        short   nspc;   /* number of sectors per cylinder */
        short   ncyl;   /* number of cylinders */
        short   *off;
};

/*
 * request codes. Must be the same a F_XXX above
 */
#define READ    1
#define WRITE   2

#define NBUFS   4

char    b[NBUFS][MAXBSIZE];
daddr_t blknos[NBUFS];

#define NFILES  4
struct  iob iob[NFILES];

#define PHYSUBA0        0x20006000
#define PHYSMBA0        0x20010000
#define PHYSMBA1        0x20012000
#define PHYSUMEM        0x2013e000

extern  int errno;      /* just like unix */

/* error codes */
#define EBADF   1       /* bad file descriptor */
#define EOFFSET 2       /* relative seek not supported */
#define EDEV    3       /* improper device specification on open */
#define ENXIO   4       /* unknown device specified */
#define EUNIT   5       /* improper unit specification */
#define ESRCH   6       /* directory search for file failed */
#define EIO     7       /* generic error */
#define ECMD    10      /* undefined driver command */
#define EBSE    11      /* bad sector error */
#define EWCK    12      /* write check error */
#define EHER    13      /* hard error */
#define EECC    14      /* severe ecc error, sector recorded as bad*/

/* ioctl's -- for disks just now */
#define SAIOHDR         (('d'<<8)|1)    /* next i/o includes header */
#define SAIOCHECK       (('d'<<8)|2)    /* next i/o checks data */
#define SAIOHCHECK      (('d'<<8)|3)    /* next i/o checks header & data */
#define SAIONOBAD       (('d'<<8)|4)    /* inhibit bad sector forwarding */
#define SAIODOBAD       (('d'<<8)|5)    /* do bad sector forwarding */
#define SAIOECCLIM      (('d'<<8)|6)    /* report sectors as bad if more than
                                         * 5 bits are bad in ecc */
#define SAIOECCUNL      (('d'<<8)|7)    /* use standard ecc procedures */
#define SAIODEVDATA     (('d'<<8)|8)    /* get device data */

/* codes for sector header word 1 */
#define HDR1_FMT22      0x1000  /* standard 16 bit format */
#define HDR1_OKSCT      0xc000  /* sector ok */