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Annotation of researchv8dc/sys/boot/stand/saio.h, revision 1.1.1.1

1.1       root        1: 
                      2: /*     saio.h  4.4     3/15/81 */
                      3: 
                      4: /*
                      5:  * header file for standalone package
                      6:  */
                      7: 
                      8: /*
                      9:  * io block: includes an
                     10:  * inode, cells for the use of seek, etc,
                     11:  * and a buffer.
                     12:  */
                     13: #undef i_buf   /* curse you clever folk from inode.h */
                     14: struct iob {
                     15:        char    i_flgs;
                     16:        char    i_blksz;        /* BIG or SMALL */
                     17:        struct  inode i_ino;
                     18:        int     i_unit;
                     19:        daddr_t i_boff;
                     20:        daddr_t i_cyloff;
                     21:        off_t   i_offset;
                     22:        daddr_t i_bn;
                     23:        char    *i_ma;
                     24:        int     i_cc;
                     25:        char    i_buf[BUFSIZE];
                     26: };
                     27: 
                     28: #define F_READ 01
                     29: #define F_WRITE        02
                     30: #define F_ALLOC        04
                     31: #define F_FILE 010
                     32: 
                     33: /*
                     34:  * dev switch
                     35:  */
                     36: #define SMALL 0
                     37: #define BIG 64
                     38: struct devsw {
                     39:        char    *dv_name;
                     40:        int     (*dv_strategy)();
                     41:        int     (*dv_open)();
                     42:        int     (*dv_close)();
                     43:        int     dv_size;                /* BIG or SMALL */
                     44: };
                     45: 
                     46: struct devsw devsw[];
                     47: 
                     48: /*
                     49:  * request codes. Must be the same a F_XXX above
                     50:  */
                     51: #define        READ    1
                     52: #define        WRITE   2
                     53: 
                     54: #define        NBUFS   4
                     55: 
                     56: char   b[NBUFS][BUFSIZE];
                     57: daddr_t        blknos[NBUFS];
                     58: 
                     59: #define NFILES 4
                     60: struct iob iob[NFILES];

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