xref: /csrg-svn/sys/vax/stand/mba.c (revision 9186)
1*9186Ssam /*	mba.c	4.5	82/11/13	*/
2323Sbill 
3323Sbill #include "../h/param.h"
4323Sbill #include "../h/inode.h"
5323Sbill #include "../h/pte.h"
67446Sroot #include "../h/fs.h"
7323Sbill #include "../h/vm.h"
8*9186Ssam 
9*9186Ssam #include "../vax/mtpr.h"
10*9186Ssam #include "../vaxmba/mbareg.h"
11*9186Ssam 
12323Sbill #include "saio.h"
133262Swnj #include "savax.h"
14323Sbill 
153262Swnj mbastart(io, func)
163262Swnj 	register struct iob *io;
173262Swnj 	int func;
18323Sbill {
193262Swnj 	struct mba_regs *mba = mbamba(io->i_unit);
203262Swnj 	struct mba_drv *drv = mbadrv(io->i_unit);
213262Swnj 	register struct pte *pte = mba->mba_map;
22323Sbill 	int npf;
23323Sbill 	unsigned v;
24323Sbill 	int o;
25323Sbill 	int vaddr;
26323Sbill 
27323Sbill 	v = btop(io->i_ma);
28323Sbill 	o = (int)io->i_ma & PGOFSET;
29323Sbill 	npf = btoc(io->i_cc + o);
303262Swnj 	vaddr = o;
31323Sbill 	while (--npf >= 0)
32323Sbill 		*(int *)pte++ = v++ | PG_V;
333262Swnj 	mba->mba_sr = -1;
343262Swnj 	mba->mba_bcr = -io->i_cc;
353262Swnj 	mba->mba_var = vaddr;
363262Swnj 	if (func == WRITE)
373262Swnj 		drv->mbd_cs1 = MB_WCOM | MB_GO;
383262Swnj 	else
393262Swnj 		drv->mbd_cs1 = MB_RCOM | MB_GO;
40323Sbill }
41415Sbill 
42415Sbill mbainit(mbanum)
43415Sbill 	int mbanum;
44415Sbill {
453262Swnj 	register struct mba_regs *mba = mbaddr[mbanum];
46415Sbill 
473262Swnj 	/* SHOULD BADADDR IT */
483262Swnj 	if (mbaact & (1<<mbanum))
493262Swnj 		return;
503262Swnj 	mba->mba_cr = MBCR_INIT;
51415Sbill 	mbaact |= 1<<mbanum;
52415Sbill }
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