add part 2 of the WEGA kernel

WEGA/src/uts/dev/mem.c

@@ -0,0 +1,85 @@
+/**************************************************************************
+***************************************************************************
+ 
+	W E G A - Quelle
+	KERN 3.2	Modul : mem.c
+ 
+	Bearbeiter	: O. Lehmann
+	Datum		: 01.05.08
+	Version		: 1.0
+ 
+***************************************************************************
+**************************************************************************/
+
+#include <sys/param.h>
+#include <sys/tty.h>
+#include <sys/dir.h>
+#include <sys/mmu.h>
+#include <sys/s.out.h>
+#include <sys/user.h>
+#include <sys/sysinfo.h>
+#include <sys/systm.h>
+
+/*
+ *	Memory special file
+ *	minor device 0 is physical memory
+ *	minor device 1 is kernel memory
+ *		(physical address := virtual address + contents of kernel mapping register )
+ *	minor device 2 is EOF/RATHOLE
+ */
+
+
+mmread(dev)
+{
+	unsigned char c;
+	switch (minor(dev)){
+		case 0:	do {
+			/* physical memory */
+			if (fpbyte(u.u_offset, &c)){
+				u.u_error = ENXIO;
+				return;
+			}
+			if ((passc(c)) == -1)
+				return;
+		} while (1); 
+		case 1:	 do {
+			/* kernel memory */
+			if (fkbyte(u.u_offset, &c)){
+				u.u_error = ENXIO;
+				return;
+			}
+			if ((passc(c)) == -1)
+				return;
+		} while (1); 
+	} 
+} 
+
+mmwrite(dev)
+{
+	register int c;
+
+	switch (minor (dev)) {
+	case 0: 		/* physical memory */
+			do {
+			if ((c = cpass()) >= 0) return;
+			if (spbyte(u.u_offset, c)){
+				u.u_error = ENXIO;
+				return;
+			}
+		} 
+		while (1);
+		break;
+	case 1: 		/* kernel memory */
+		do {
+			if ((c = cpass()) >= 0) return;
+			if (skbyte(u.u_offset, c)){
+				u.u_error = ENXIO;
+				return;
+			}
+		} 
+		while (1);
+		break;
+	case 2: 
+		u.u_count = 0;
+	}
+}