From bce19ec845b406b623d3557d96b5817d608c7267 Mon Sep 17 00:00:00 2001
From: Oliver Lehmann <lehmann@ans-netz.de>
Date: Thu, 1 May 2008 14:44:02 +0000
Subject: [PATCH] add part 2 of the WEGA kernel

---
 WEGA/src/uts/dev/mem.c | 85 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 85 insertions(+)
 create mode 100644 WEGA/src/uts/dev/mem.c

diff --git a/WEGA/src/uts/dev/mem.c b/WEGA/src/uts/dev/mem.c
new file mode 100644
index 0000000..60dd77d
--- /dev/null
+++ b/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;
+	}
+}