1 files changed, 47 insertions, 0 deletions
diff --git a/i386/i386at/mem.c b/i386/i386at/mem.c
new file mode 100644
index 0000000..5e51676
--- /dev/null
+++ b/i386/i386at/mem.c
@@ -0,0 +1,47 @@
+/*
+ * Mach Operating System
+ * Copyright (c) 1991,1990,1989 Carnegie Mellon University
+ * All Rights Reserved.
+ *
+ * Permission to use, copy, modify and distribute this software and its
+ * documentation is hereby granted, provided that both the copyright
+ * notice and this permission notice appear in all copies of the
+ * software, derivative works or modified versions, and any portions
+ * thereof, and that both notices appear in supporting documentation.
+ *
+ * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
+ * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
+ * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
+ *
+ * Carnegie Mellon requests users of this software to return to
+ *
+ *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
+ *  School of Computer Science
+ *  Carnegie Mellon University
+ *  Pittsburgh PA 15213-3890
+ *
+ * any improvements or extensions that they make and grant Carnegie Mellon
+ * the rights to redistribute these changes.
+ */
+
+#include <device/io_req.h>
+#include <i386/model_dep.h>
+
+/* This provides access to any memory that is not main RAM */
+
+/*ARGSUSED*/
+int
+memmmap(dev, off, prot)
+int		dev;
+vm_offset_t	off;
+vm_prot_t	prot;
+{
+	if (off == 0)
+		return 0;
+	else if (off < 0xa0000)
+		return -1;
+	else if (off >= 0x100000 && off < phys_last_addr)
+		return -1;
+	else
+		return i386_btop(off);
+}