X-Git-Url: https://git.subgeniuskitty.com/unix-history/.git/blobdiff_plain/74bfa0d5d127756fbc09e5d71f088e0715ad4233..6ddc83ab3f80fa56ed0240be0bf2372d18d1cbda:/usr/src/sys/vax/uba/dh.c

diff --git a/usr/src/sys/vax/uba/dh.c b/usr/src/sys/vax/uba/dh.c
index 0bf4c02d74..05c190080b 100644
--- a/usr/src/sys/vax/uba/dh.c
+++ b/usr/src/sys/vax/uba/dh.c
@@ -1,9 +1,9 @@
 /*
- * Copyright (c) 1982 Regents of the University of California.
+ * Copyright (c) 1982, 1986 Regents of the University of California.
  * All rights reserved.  The Berkeley software License Agreement
  * specifies the terms and conditions for redistribution.
  *
- *	@(#)dh.c	6.12 (Berkeley) %G%
+ *	@(#)dh.c	7.5 (Berkeley) %G%
  */
 
 #include "dh.h"
@@ -82,12 +82,14 @@ static short timerstarted;
 int	dhstart(), ttrstrt();
 
 /*
- * The clist space is mapped by the driver onto each UNIBUS.
+ * The clist space is mapped by one terminal driver onto each UNIBUS.
+ * The identity of the board which allocated resources is recorded,
+ * so the process may be repeated after UNIBUS resets.
  * The UBACVT macro converts a clist space address for unibus uban
  * into an i/o space address for the DMA routine.
  */
-int	dh_ubinfo[NUBA];		/* info about allocated unibus map */
-int	cbase[NUBA];			/* base address in unibus map */
+int	dh_uballoc[NUBA];	/* which dh (if any) allocated unibus map */
+int	cbase[NUBA];		/* base address of clists in unibus map */
 #define	UBACVT(x, uban)		(cbase[uban] + ((x)-(char *)cfree))
 
 /*
@@ -134,6 +136,8 @@ dhattach(ui)
 {
 
 	dhsoftCAR[ui->ui_unit] = ui->ui_flags;
+	cbase[ui->ui_ubanum] = -1;
+	dh_uballoc[ui->ui_unit] = -1;
 }
 
 /*
@@ -194,12 +198,10 @@ dhopen(dev, flag)
 	 * block uba resets which can clear the state.
 	 */
 	s = spl5();
-	if (dh_ubinfo[ui->ui_ubanum] == 0) {
-		/* 512+ is a kludge to try to get around a hardware problem */
-		dh_ubinfo[ui->ui_ubanum] =
-		    uballoc(ui->ui_ubanum, (caddr_t)cfree,
-			512+nclist*sizeof(struct cblock), 0);
-		cbase[ui->ui_ubanum] = dh_ubinfo[ui->ui_ubanum]&0x3ffff;
+	if (cbase[ui->ui_ubanum] == -1) {
+		dh_uballoc[ui->ui_ubanum] = dh;
+		cbase[ui->ui_ubanum] = UBAI_ADDR(uballoc(ui->ui_ubanum,
+		    (caddr_t)cfree, nclist*sizeof(struct cblock), 0));
 	}
 	if (timerstarted == 0) {
 		timerstarted++;
@@ -212,13 +214,21 @@ dhopen(dev, flag)
 	}
 	splx(s);
 	/*
-	 * If this is first open, initialze tty state to default.
+	 * If this is first open, initialize tty state to default.
 	 */
 	if ((tp->t_state&TS_ISOPEN) == 0) {
 		ttychars(tp);
-		tp->t_ispeed = ISPEED;
-		tp->t_ospeed = ISPEED;
-		tp->t_flags = IFLAGS;
+#ifndef PORTSELECTOR
+		if (tp->t_ispeed == 0) {
+#else
+			tp->t_state |= TS_HUPCLS;
+#endif PORTSELECTOR
+			tp->t_ispeed = ISPEED;
+			tp->t_ospeed = ISPEED;
+			tp->t_flags = IFLAGS;
+#ifndef PORTSELECTOR
+		}
+#endif PORTSELECTOR
 		dhparam(unit);
 	}
 	/*
@@ -395,6 +405,7 @@ dhparam(unit)
 	if ((tp->t_ispeed)==0) {
 		tp->t_state |= TS_HUPCLS;
 		dmctl(unit, DML_OFF, DMSET);
+		splx(s);
 		return;
 	}
 	lpar = ((tp->t_ospeed)<<10) | ((tp->t_ispeed)<<6);
@@ -590,17 +601,24 @@ dhreset(uban)
 	register struct uba_device *ui;
 	int i;
 
-	if (dh_ubinfo[uban] == 0)
-		return;
-	dh_ubinfo[uban] = uballoc(uban, (caddr_t)cfree,
-	    512+nclist*sizeof (struct cblock), 0);
-	cbase[uban] = dh_ubinfo[uban]&0x3ffff;
 	dh = 0;
 	for (dh = 0; dh < NDH; dh++) {
 		ui = dhinfo[dh];
 		if (ui == 0 || ui->ui_alive == 0 || ui->ui_ubanum != uban)
 			continue;
 		printf(" dh%d", dh);
+		if (dh_uballoc[uban] == dh) {
+			int info;
+
+			info = uballoc(uban, (caddr_t)cfree,
+			    nclist * sizeof(struct cblock), UBA_CANTWAIT);
+			if (info)
+				cbase[uban] = UBAI_ADDR(info);
+			else {
+				printf(" [can't get uba map]");
+				cbase[uban] = -1;
+			}
+		}
 		((struct dhdevice *)ui->ui_addr)->un.dhcsr |= DH_IE;
 		((struct dhdevice *)ui->ui_addr)->dhsilo = 0;
 		unit = dh * 16;
@@ -683,16 +701,19 @@ dmopen(dev)
 	}
 	addr = (struct dmdevice *)ui->ui_addr;
 	s = spl5();
-	addr->dmcsr &= ~DM_SE;
-	while (addr->dmcsr & DM_BUSY)
-		;
-	addr->dmcsr = unit;
-	addr->dmlstat = DML_ON;
-	if ((addr->dmlstat&DML_CAR) || (dhsoftCAR[dm]&(1<<unit)))
-		tp->t_state |= TS_CARR_ON;
-	addr->dmcsr = DM_IE|DM_SE;
-	while ((tp->t_state&TS_CARR_ON)==0)
+	for (;;) {
+		addr->dmcsr &= ~DM_SE;
+		while (addr->dmcsr & DM_BUSY)
+			;
+		addr->dmcsr = unit;
+		addr->dmlstat = DML_ON;
+		if ((addr->dmlstat & DML_CAR) || (dhsoftCAR[dm] & (1 << unit)))
+			tp->t_state |= TS_CARR_ON;
+		addr->dmcsr = DM_IE|DM_SE;
+		if (tp->t_state & TS_CARR_ON)
+			break;
 		sleep((caddr_t)&tp->t_rawq, TTIPRI);
+	}
 	splx(s);
 }