Add original unix v6

2018-01-27 22:35:41 +09:00
commit 2c7099ee50
664 changed files with 106254 additions and 0 deletions
@@ -0,0 +1,103 @@
+#
+/*
+ */
+
+/*
+ * RF disk driver
+ */
+
+#include "../param.h"
+#include "../buf.h"
+#include "../conf.h"
+#include "../user.h"
+
+struct {
+	int	rfcs;
+	int	rfwc;
+	int	rfba;
+	int	rfda;
+	int	rfdae;
+};
+
+struct	devtab	rftab;
+struct	buf	rrfbuf;
+
+#define	NRFBLK	1024
+#define	RFADDR	0177460
+
+#define	GO	01
+#define	RCOM	02
+#define	WCOM	04
+#define	CTLCLR	0400
+#define	IENABLE	0100
+
+rfstrategy(abp)
+struct buf *abp;
+{
+	register struct buf *bp;
+
+	bp = abp;
+	if(bp->b_flags&B_PHYS)
+		mapalloc(bp);
+	if (bp->b_blkno >= NRFBLK*(bp->b_dev.d_minor+1)) {
+		bp->b_flags =| B_ERROR;
+		iodone(bp);
+		return;
+	}
+	bp->av_forw = 0;
+	spl5();
+	if (rftab.d_actf==0)
+		rftab.d_actf = bp;
+	else
+		rftab.d_actl->av_forw = bp;
+	rftab.d_actl = bp;
+	if (rftab.d_active==0)
+		rfstart();
+	spl0();
+}
+
+rfstart()
+{
+	register struct buf *bp;
+
+	if ((bp = rftab.d_actf) == 0)
+		return;
+	rftab.d_active++;
+	RFADDR->rfdae = bp->b_blkno.hibyte;
+	devstart(bp, &RFADDR->rfda, bp->b_blkno<<8, 0);
+}
+
+rfintr()
+{
+	register struct buf *bp;
+
+	if (rftab.d_active == 0)
+		return;
+	bp = rftab.d_actf;
+	rftab.d_active = 0;
+	if (RFADDR->rfcs < 0) {		/* error bit */
+		deverror(bp, RFADDR->rfcs, RFADDR->rfdae);
+		RFADDR->rfcs = CTLCLR;
+		if (++rftab.d_errcnt <= 10) {
+			rfstart();
+			return;
+		}
+		bp->b_flags =| B_ERROR;
+	}
+	rftab.d_errcnt = 0;
+	rftab.d_actf = bp->av_forw;
+	iodone(bp);
+	rfstart();
+}
+
+rfread(dev)
+{
+
+	physio(rfstrategy, &rrfbuf, dev, B_READ);
+}
+
+rfwrite(dev)
+{
+
+	physio(rfstrategy, &rrfbuf, dev, B_WRITE);
+}