--- Gnu-Mach/device/dev_hdr.h	2020/09/02 04:36:57	1.1
+++ Gnu-Mach/device/dev_hdr.h	2020/09/02 04:45:29	1.1.1.2
@@ -28,25 +28,52 @@
  *	Date: 	3/89
  */
 
+/*
+ * Mach device emulation definitions (i386at version).
+ *
+ * Copyright (c) 1996 The University of Utah and
+ * the Computer Systems Laboratory at the University of Utah (CSL).
+ * All rights reserved.
+ *
+ * Permission to use, copy, modify and distribute this software is hereby
+ * granted provided that (1) source code retains these copyright, permission,
+ * and disclaimer notices, and (2) redistributions including binaries
+ * reproduce the notices in supporting documentation, and (3) all advertising
+ * materials mentioning features or use of this software display the following
+ * acknowledgement: ``This product includes software developed by the
+ * Computer Systems Laboratory at the University of Utah.''
+ *
+ * THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS
+ * IS" CONDITION.  THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF
+ * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
+ *
+ * CSL requests users of this software to return to csl-dist@cs.utah.edu any
+ * improvements that they make and grant CSL redistribution rights.
+ *
+ *      Author: Shantanu Goel, University of Utah CSL
+ */
+
 #ifndef	_DEVICE_DEV_HDR_H_
 #define	_DEVICE_DEV_HDR_H_
 
+#include <ipc/ipc_types.h>
 #include <mach/port.h>
 #include <kern/lock.h>
 #include <kern/queue.h>
 
 #include <device/conf.h>
 
-#ifdef i386
-#include <i386at/dev_hdr.h>
-#else
-#define mach_device			device
-#define mach_device_t			device_t
-#define MACH_DEVICE_NULL		DEVICE_NULL
-#define mach_device_reference		device_reference
-#define mach_device_deallocate		device_deallocate
-#define mach_convert_device_to_port	convert_device_to_port
-#endif
+/* This structure is associated with each open device port.
+   The port representing the device points to this structure.  */
+struct device
+{
+  struct device_emulation_ops *emul_ops;
+  void *emul_data;
+};
+
+typedef struct device *device_t;
+
+#define DEVICE_NULL	((device_t) 0)
 
 /*
  * Generic device header.  May be allocated with the device,
@@ -72,9 +99,7 @@ struct mach_device {
 	int		dev_number;	/* device number */
 	int		bsize;		/* replacement for DEV_BSIZE */
 	struct dev_ops	*dev_ops;	/* and operations vector */
-#ifdef i386
 	struct device	dev;		/* the real device structure */
-#endif
 };
 typedef	struct mach_device *mach_device_t;
 #define	MACH_DEVICE_NULL ((mach_device_t)0)
@@ -82,22 +107,22 @@ typedef	struct mach_device *mach_device_
 /*
  * To find and remove device entries
  */
-mach_device_t	device_lookup();	/* by name */
+mach_device_t	device_lookup(char *);	/* by name */
 
-void		mach_device_reference();
-void		mach_device_deallocate();
+void		mach_device_reference(mach_device_t);
+void		mach_device_deallocate(mach_device_t);
 
 /*
  * To find and remove port-to-device mappings
  */
-device_t	dev_port_lookup();
-void		dev_port_enter();
-void		dev_port_remove();
+device_t	dev_port_lookup(ipc_port_t);
+void		dev_port_enter(mach_device_t);
+void		dev_port_remove(mach_device_t);
 
 /*
  * To call a routine on each device
  */
-boolean_t	dev_map();
+boolean_t	dev_map(boolean_t (*)(), mach_port_t);
 
 /*
  * To lock and unlock state and open-count
@@ -105,4 +130,20 @@ boolean_t	dev_map();
 #define	device_lock(device)	simple_lock(&(device)->lock)
 #define	device_unlock(device)	simple_unlock(&(device)->lock)
 
+/*
+ * device name lookup
+ */
+extern boolean_t dev_name_lookup(
+    char *      name,
+    dev_ops_t   *ops,   /* out */
+    int     *unit);  /* out */
+
+/*
+ * Change an entry in the indirection list.
+ */
+extern void dev_set_indirection(
+    char        *name,
+    dev_ops_t   ops,
+    int     unit);
+
 #endif	/* _DEVICE_DEV_HDR_H_ */