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Annotation of researchv9/sys/sun3/zscom.h, revision 1.1

1.1     ! root        1: /*    @(#)zscom.h 1.1 86/02/03 SMI      */
        !             2: 
        !             3: /*
        !             4:  * Copyright (c) 1984 by Sun Microsystems, Inc.
        !             5:  */
        !             6: 
        !             7: /*
        !             8:  * Support common to all users of Z8530 devices
        !             9:  */
        !            10: 
        !            11: /*
        !            12:  * Interrupt vectors - per protocol
        !            13:  */
        !            14: struct zsops {
        !            15:        int     (*zsop_attach)();       /* attach protocol */
        !            16:        int     (*zsop_txint)();        /* xmit buffer empty */
        !            17:        int     (*zsop_xsint)();        /* external/status */
        !            18:        int     (*zsop_rxint)();        /* receive char available */
        !            19:        int     (*zsop_srint)();        /* special receive condition */
        !            20:        int     (*zsop_softint)();      /* process software interrupt */
        !            21: };
        !            22: 
        !            23: /*
        !            24:  * Common data
        !            25:  */
        !            26: struct zscom {
        !            27:        int     (*zs_vec[4])();         /* vector routines - must be first */
        !            28:        struct zscc_device *zs_addr;    /* address of half of chip  - second */
        !            29:        short   zs_unit;                /* which channel (0:NZSLINE) */
        !            30:        caddr_t zs_priv;                /* protocol private data */
        !            31:        struct zsops *zs_ops;           /* intr op vector */
        !            32:        u_char  zs_wreg[16];            /* shadow of write registers */
        !            33:        char    zs_flags;               /* random flags */
        !            34: };
        !            35: /* flags */
        !            36: #define        ZS_NEEDSOFT     1
        !            37: 
        !            38: int zssoftpend;                                /* level 3 interrupt pending */
        !            39: #define        ZSSETSOFT(zs)   {               \
        !            40:        zs->zs_flags |= ZS_NEEDSOFT;    \
        !            41:        if (!zssoftpend) {              \
        !            42:                zssoftpend = 1;         \
        !            43:                setzssoft();            \
        !            44:        }                               \
        !            45: }
        !            46: 
        !            47: /* 
        !            48:  * Macros to access a port
        !            49:  */
        !            50: #define        ZREAD(n)        zszread(zs->zs_addr, n)
        !            51: #define        ZWRITE(n,v)     zszwrite(zs->zs_addr, n, (int)(zs->zs_wreg[n] = v))
        !            52: #define        ZBIS(n,v)       zszwrite(zs->zs_addr, n, (int)(zs->zs_wreg[n] |= v))
        !            53: #define        ZBIC(n,v)       zszwrite(zs->zs_addr, n, (int)(zs->zs_wreg[n] &=~ v))
        !            54: 
        !            55: extern struct zsops *zs_proto[];

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