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Index: b/i386/Makefrag.am
===================================================================
--- a/i386/Makefrag.am
+++ b/i386/Makefrag.am
@@ -31,6 +31,7 @@ libkernel_a_SOURCES += \
i386/i386at/immc.c \
i386/i386at/int_init.c \
i386/i386at/interrupt.S \
+ i386/i386at/iopl.c \
i386/i386at/kd.c \
i386/i386at/kd.h \
i386/i386at/kd_event.c \
Index: b/i386/i386at/conf.c
===================================================================
--- a/i386/i386at/conf.c
+++ b/i386/i386at/conf.c
@@ -58,6 +58,9 @@ extern int kbdgetstat(), kbdsetstat();
extern int mouseopen(), mouseclose(), mouseread(), mousegetstat();
#define mousename "mouse"
+extern vm_offset_t ioplmmap();
+#define ioplname "iopl"
+
extern int kmsgopen(), kmsgclose(), kmsgread(), kmsggetstat();
#define kmsgname "kmsg"
@@ -113,6 +116,11 @@ struct dev_ops dev_name_list[] =
nodev, nulldev, nulldev, 0,
nodev },
+ { ioplname, nulldev, nulldev, nodev,
+ nodev, nodev, nodev, ioplmmap,
+ nodev, nulldev, nulldev, 0,
+ nodev },
+
#ifdef MACH_KMSG
{ kmsgname, kmsgopen, kmsgclose, kmsgread,
nodev, kmsggetstat, nodev, nomap,
Index: b/i386/i386at/iopl.c
===================================================================
--- /dev/null
+++ b/i386/i386at/iopl.c
@@ -0,0 +1,56 @@
+/*
+ * 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>
+
+/*ARGSUSED*/
+int iopl_all = 1;
+int
+ioplmmap(dev, off, prot)
+int dev;
+vm_offset_t off;
+vm_prot_t prot;
+{
+ extern vm_offset_t phys_last_addr;
+
+ if (iopl_all) {
+ 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);
+
+ }
+ if (off > 0x60000)
+ return(-1);
+
+ /* Get page frame number for the page to be mapped. */
+
+ return(i386_btop(0xa0000 + off));
+}
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