usr/src/sys/vax/stand/savax.h

/*      savax.h 4.1     81/03/15        */

/*
 * Standalone definitions peculiar to vaxen
 * The mba devices in the standalone system are addressed as
 *      xx(unit,section)
 * where unit is
 *      8*mbanum+drive
 * The mbadrv macro gives the address of the device registers
 * for the specified unit; the mbamba macro gives the address of the
 * mba registers themselves.
 *
 * The uba devices are also addressed by giving, as unit,
 *      8*ubanum+drive
 * The ubamem macro converts a specified unibus address (ala pdp-11)
 * into a unibus memory address space address.
 */

int     cpu;            /* see <sys/cpu.h> */

#define MAXNMBA 4
struct  mba_regs **mbaddr;
int     mbaact;
caddr_t *umaddr;
struct  uba_regs **ubaddr;

#define UNITTOMBA(unit)         ((unit)>>3)
#define UNITTODRIVE(unit)       ((unit)&07)

#define mbamba(unit)            (mbaddr[UNITTOMBA(unit)])
#define mbadrv(unit)            (&mbamba(unit)->mba_drv[UNITTODRIVE(unit)])

#define UNITTOUBA(unit)         ((unit)>>3)
#define ubauba(unit)            (ubaddr[UNITTOUBA(unit)])
#define ubamem(unit, off)       \
        ((struct device *)(umaddr[UNITTOUBA(unit)]+(off&017777)))