stamp for 4bsd

[unix-history] / usr / src / sys / vax / stand / uba.c

/*      uba.c   4.1     %G%     */

#include "../h/param.h"
#include "../h/inode.h"
#include "../h/pte.h"
#include "../h/uba.h"
#include "../h/vm.h"
#include "saio.h"

ubasetup(io, bdp)
register struct iob *io;
{
       register int i;
       int npf;
       unsigned v;
       register struct pte *pte;
       int o, vaddr, temp;

       v = btop(io->i_ma);
       o = (int)io->i_ma & PGOFSET;
       npf = btoc(io->i_cc + o) +1;
       pte = &(((struct uba_regs *)PHYSUBA0)->uba_map[0]);
       temp = (bdp << 21) | MRV;
       if (bdp && (o & 01))
               temp |= BO;
       v &= 0x1fffff;                  /* drop to physical addr */
       while (--npf != 0)
               *(int *)pte++ = v++ | temp;
       *(int *)pte++ = 0;
       return ((bdp << 28) | o);
}

ubafree(mr)
       int mr;
{
       register int bdp, reg, npf, a;

       bdp = (mr >> 28) & 0x0f;
       if (bdp)
               ((struct uba_regs *)PHYSUBA0)->uba_dpr[bdp] |= BNE;
}