Dowty SBD skeleton

sys/conf/GENERIC

@@ -263,4 +263,5 @@ PROFILE		NO		# system profiling with KW11P clock
 
 INGRES		NO		# include the Ingres lock driver
 
-NIBV		1		# IBV11 GPIB
+NIBV		1		# IBV11 GPIB
+NSBD		1		# Dowty SBD

sys/conf/Make.pdpuba

@@ -17,9 +17,9 @@ VPATH=	../pdpuba
 CFILES=	${U}/br.c ${U}/dh.c ${U}/dn.c ${U}/dhu.c ${U}/dhv.c ${U}/dkbad.c \
 	${U}/dr.c ${U}/dz.c ${U}/hk.c ${U}/ht.c ${U}/lp.c ${U}/ra.c ${U}/rk.c \
 	${U}/rl.c ${U}/rx.c ${U}/si.c ${U}/tm.c ${U}/tmscp.c ${U}/tmscpdump.c \
-	${U}/ts.c ${U}/xp.c ${U}/ibv.c
+	${U}/ts.c ${U}/xp.c ${U}/ibv.c ${U}/sbd.c
 OBJS=	br.o dh.o dhu.o dhv.o dkbad.o dn.o dr.o dz.o hk.o ht.o lp.o ra.o rk.o \
-	rl.o rx.o si.o tm.o tmscp.o tmscpdump.o ts.o xp.o dn.o ibv.o
+	rl.o rx.o si.o tm.o tmscp.o tmscpdump.o ts.o xp.o dn.o ibv.o sbd.o
 
 .c.o:
 	${CC} ${CFLAGS} -S $*.c

sys/conf/Make.sunix

@@ -58,7 +58,7 @@ OV3=	clock.o cons.o kern_time.o \
 	machdep2.o quota_sys.o subr_prf.o sys_process.o \
 	syscalls.o ufs_mount.o
 OV4=	hk.o init_main.o kern_prot.o tty_pty.o quota_kern.o quota_subr.o \
-	quota_ufs.o vm_swp.o vm_swap.o vm_proc.o ibv.o
+	quota_ufs.o vm_swp.o vm_swap.o vm_proc.o ibv.o sbd.o
 OV5=	ht.o tm.o ts.o
 OV6=	tmscp.o tmscpdump.o mem.o
 OV7=	mch_fpsim.o ingreslock.o ufs_disksubr.o

sys/conf/config

@@ -188,6 +188,7 @@ echo "#define NLP	$NLP"		> ../$MACHINE/lp.h
 echo "#define LP_MAXCOL	$LP_MAXCOL"	>> ../$MACHINE/lp.h
 echo "#define NPTY	$NPTY"		> ../$MACHINE/pty.h
 echo "#define NIBV	$NIBV"		> ../$MACHINE/ibv.h
+echo "#define NSBD	$NSBD"		> ../$MACHINE/sbd.h
 if [ $INGRES = YES ]; then
 	echo "#define NINGRES	1"	> ../$MACHINE/ingres.h
 else

sys/pdp/conf.c

@@ -345,6 +345,15 @@ int	ibvopen(), ibvclose(), ibvread(), ibvwrite();
 #define ibvwrite	nodev
 #endif
 
+#include "sbd.h"
+#if NSBD > 0
+int	sbdopen(), sbdclose(), sbdwrite();
+#else
+#define sbdopen		nodev
+#define sbdclose	nodev
+#define sbdwrite	nodev
+#endif
+
 int	logopen(), logclose(), logread(), logioctl(), logselect();
 int	syopen(), syread(), sywrite(), syioctl(), syselect();
 
@@ -481,6 +490,10 @@ struct cdevsw	cdevsw[] = {
 	ibvopen,	ibvclose,	ibvread,	ibvwrite,
 	nodev,		nulldev,	0,		nodev,
 	nulldev,
+/* sbd = 28 */
+	sbdopen,	sbdclose,	nodev,		sbdwrite,
+	nodev,		nulldev,	0,		nodev,
+	nulldev,
 };
 
 int	nchrdev = sizeof(cdevsw) / sizeof(cdevsw[0]);
@@ -539,7 +552,7 @@ isdisk(dev, type)
 	/* NOTREACHED */
 }
 
-#define MAXDEV	28
+#define MAXDEV	29
 static char chrtoblktbl[MAXDEV] =  {
       /* CHR */      /* BLK */
 	/* 0 */		NODEV,
@@ -569,7 +582,8 @@ static char chrtoblktbl[MAXDEV] =  {
 	/* 24 */	NODEV,
 	/* 25 */	NODEV,
 	/* 26 */	NODEV,
-	/* 27 */	NODEV		/* IBV11 */
+	/* 27 */	NODEV,		/* IBV11 */
+	/* 28 */	NODEV		/* Dowty SBD */
 };
 
 /*

sys/pdp/scb.s

@@ -38,6 +38,7 @@
 #include "xp.h"
 #include "vv.h"
 #include "ibv.h"
+#include "sbd.h"
 
 /*
  * Reference the global symbol "_end" so that ld(1) will define it for us.

sys/pdpuba/sbd.c

@@ -0,0 +1,78 @@
+#include "../h/param.h"
+#include "../h/errno.h"
+#include "../h/syslog.h"
+#include "../h/uio.h"
+#include "sbd.h"
+
+#define NSBD 1
+
+/*
+ * Default status register 0760040
+ * Default vector 0270 (PRI 4)
+ */
+
+#define dev_t int
+
+struct sbddevice *sbd = (struct sbddevice *)0760040;
+
+sbdattach(addr, unit)
+     struct sbddevice *addr;
+     u_int unit;
+{
+
+  return 1;
+}
+
+/* Simple example to set to graphics mode, erase screen and write hello */
+static int sbdcmd[] = {
+  22,  /* 22 bytes / 11 words */
+  (0 << 8) | SBD_FCPIX,
+  (0 << 8) | SBD_FCRUB,
+  (4 << 8) | SBD_FCALP,
+  0300, /* x coord */
+  0300, /* y coord */
+  06,   /* 6 characters */
+  "eh",
+  "ll",
+  "!o",
+  -1
+};
+
+sbdopen(dev, flag)
+     dev_t dev;
+     short flag;
+{
+
+  /* Since the command block will remain in kernel space (i.e. lower
+   * addresses), we can ignore the most significant bits of the
+   * command block address. This will avoid needing to handle pages
+   * etc.
+   */
+  unsigned int addr = (unsigned int)sbdcmd;
+
+  /* 0376 to avoid overwriting Q (abort) - we are guarenteed a word
+   * aligned memory block anyway.
+   */
+  sbd->hahl = 0376 & addr;
+  sbd->hahr = 0377 & (addr >> 8);
+  sbd->hcsr = 0;
+
+  return 0;
+}
+
+sbdclose(dev, flag)
+     dev_t	dev;
+     int	flag;
+{
+
+  return 0;
+}
+
+sbdwrite(dev, uio, flag)
+     dev_t dev;
+     struct uio *uio;
+     int flag;
+{
+
+  return 0;
+}

sys/pdpuba/sbd.h

@@ -0,0 +1,53 @@
+
+/*
+ *                  Bit No:  7   6   5   4   3   2   1   0
+ *                         +---+---+---+---+---+---+---+---+
+ * Interrupt Vec    HIVR   |          V7 - V0              |
+ *                         +---+---+-----------------------+
+ * Cmd and Status   HCSR   | R | I |        A21 - A16      |
+ *                         +---+---+-----------------------+
+ * Addr High        HAHR   |             A15 - A8          |
+ *                         +---------------------------+---+
+ * Addr Low         HAHL   |          A7 - A1          | Q |
+ *                         +---+---+---+---+---+---+---+---+
+ *
+ *                          Q = Abort
+ *                          R = Ready
+ *                          I = Interrupt Enable
+ *
+ * Command buffer address is set in Q,A1-A21.
+ *    Q should always be 0, hence it must be word aligned.
+ * Execution of command buffer is performed when R is set to 0.
+ *
+ * Each register is in its own word but only the least significant 8
+ * bits are used.
+ */
+
+struct sbddevice {
+  char hinv; /* Interrupt Vector        */
+  char u0;   /* Unused                  */
+  char hcsr; /* Cmd and Status Register */
+  char u1;   /* Unused                  */
+  char hahr; /* Host Address High       */
+  char u2;   /* Unused                  */
+  char hahl; /* Host Address Low        */
+  char u3;   /* Unused                  */
+};
+
+/* SBD Register Bitmasks */
+#define SBD_INTEN_HCSR 0200 /* _ I _ _ _ _ _ _ */
+#define SBD_READY_HCSR 0400 /* R _ _ _ _ _ _ _ */
+#define SBD_HADDR_HCSR 0077 /* _ _ A A A A A A */
+#define SBD_HADDR_HAHR 0377 /* A A A A A A A A */
+#define SBD_HADDR_HAHL 0376 /* A A A A A A A _ */
+#define SBD_ABORT_HAHL 0001 /* _ _ _ _ _ _ _ Q */
+
+/* SBD Function Codes */
+#define SBD_FCRUB      0006 /* Erase rectangle                     */
+#define SBD_FCPIX      0014 /* Display pixel graphics area         */
+#define SBD_FCVEC      0027 /* Draw vector                         */
+#define SBD_FCCIR      0032 /* Draw circle                         */
+#define SBD_FCALP      0035 /* Display text on pixel area          */
+#define SBD_FCWIB      0046 /* Write image block                   */
+#define SBD_FCRIB      0047 /* Read image block                    */
+