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Annotation of 41BSD/4.0.upgrade/sys/stand/savax.h, revision 1.1

1.1     ! root        1: /*     savax.h 4.2     81/03/15        */
        !             2: 
        !             3: /*
        !             4:  * Standalone definitions peculiar to vaxen
        !             5:  * The mba devices in the standalone system are addressed as 
        !             6:  *     xx(unit,section)
        !             7:  * where unit is
        !             8:  *     8*mbanum+drive
        !             9:  * The mbadrv macro gives the address of the device registers
        !            10:  * for the specified unit; the mbamba macro gives the address of the
        !            11:  * mba registers themselves.
        !            12:  *
        !            13:  * The uba devices are also addressed by giving, as unit,
        !            14:  *     8*ubanum+drive
        !            15:  * The ubamem macro converts a specified unibus address (ala pdp-11)
        !            16:  * into a unibus memory address space address.
        !            17:  */
        !            18: 
        !            19: int    cpu;            /* see <sys/cpu.h> */
        !            20: 
        !            21: #define        MAXNMBA 4
        !            22: struct mba_regs **mbaddr;
        !            23: int    mbaact;
        !            24: caddr_t        *umaddr;
        !            25: struct uba_regs **ubaddr;
        !            26: 
        !            27: #define        UNITTOMBA(unit)         ((unit)>>3)
        !            28: #define        UNITTODRIVE(unit)       ((unit)&07)
        !            29: 
        !            30: #define        mbamba(unit)            (mbaddr[UNITTOMBA(unit)])
        !            31: #define        mbadrv(unit)            (&mbamba(unit)->mba_drv[UNITTODRIVE(unit)])
        !            32: 
        !            33: #define        UNITTOUBA(unit)         ((unit)>>3)
        !            34: #define        ubauba(unit)            (ubaddr[UNITTOUBA(unit)])
        !            35: #define        ubamem(unit, off)       ((umaddr[UNITTOUBA(unit)]+(off&017777)))

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