4.1cBSD/a/sys/stand/uba.c

/*	uba.c	4.8	82/12/17	*/

#include "../machine/pte.h"

#include "../h/param.h"
#include "../h/inode.h"
#include "../h/vm.h"
#include "../h/fs.h"

#include "../vax/cpu.h"
#include "../vaxuba/ubareg.h"

#include "saio.h"
#include "savax.h"

/*
 * Note... this routine does not
 * really allocate; unless bdp == 2
 * you always get the same space.
 * When bdp == 2 you get some other space.
 */
ubasetup(io, bdp)
	register struct iob *io;
	int bdp;
{
	int npf;
	unsigned v;
	register struct pte *pte;
	int o, temp, reg;
	static int lastreg = 128+64;

	v = btop(io->i_ma);
	o = (int)io->i_ma & PGOFSET;
	npf = btoc(io->i_cc + o) +1;
	if (bdp == 2) {
		reg = lastreg;
		lastreg += npf;
		bdp = 0;
	} else
		reg = 0;
	pte = &ubauba(io->i_unit)->uba_map[reg];
	temp = (bdp << 21) | UBAMR_MRV;
	if (bdp && (o & 01))
		temp |= UBAMR_BO;
	v &= 0x1fffff;			/* drop to physical addr */
	while (--npf != 0)
		*(int *)pte++ = v++ | temp;
	*(int *)pte++ = 0;
	return ((bdp << 28) | (reg << 9) | o);
}

ubafree(io, mr)
	struct iob *io;
	int mr;
{
	register int bdp;
 
	bdp = (mr >> 28) & 0x0f;
	if (bdp == 0)
		return;
	switch (cpu) {

	case VAX_780:
		ubauba(io->i_unit)->uba_dpr[bdp] |= UBADPR_BNE;
		break;

	case VAX_750:
		ubauba(io->i_unit)->uba_dpr[bdp] |=
		     UBADPR_PURGE|UBADPR_NXM|UBADPR_UCE;
		break;
	case VAX_730:
		break;
	}
}