Initial source

1 files changed, 108 insertions, 0 deletions

diff --git a/device/dev_hdr.h b/device/dev_hdr.h
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+/* 
+ * 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.
+ */
+/*
+ *	Author: David B. Golub, Carnegie Mellon University
+ *	Date: 	3/89
+ */
+
+#ifndef	_DEVICE_DEV_HDR_H_
+#define	_DEVICE_DEV_HDR_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
+
+/*
+ * Generic device header.  May be allocated with the device,
+ * or built when the device is opened.
+ */
+struct mach_device {
+	decl_simple_lock_data(,ref_lock)/* lock for reference count */
+	int		ref_count;	/* reference count */
+	decl_simple_lock_data(, lock)	/* lock for rest of state */
+	short		state;		/* state: */
+#define	DEV_STATE_INIT		0	/* not open  */
+#define	DEV_STATE_OPENING	1	/* being opened */
+#define	DEV_STATE_OPEN		2	/* open */
+#define	DEV_STATE_CLOSING	3	/* being closed */
+	short		flag;		/* random flags: */
+#define	D_EXCL_OPEN		0x0001	/* open only once */
+	short		open_count;	/* number of times open */
+	short		io_in_progress;	/* number of IOs in progress */
+	boolean_t	io_wait;	/* someone waiting for IO to finish */
+
+	struct ipc_port *port;		/* open port */
+	queue_chain_t	number_chain;	/* chain for lookup by number */
+	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)
+
+/*
+ * To find and remove device entries
+ */
+mach_device_t	device_lookup();	/* by name */
+
+void		mach_device_reference();
+void		mach_device_deallocate();
+
+/*
+ * To find and remove port-to-device mappings
+ */
+device_t	dev_port_lookup();
+void		dev_port_enter();
+void		dev_port_remove();
+
+/*
+ * To call a routine on each device
+ */
+boolean_t	dev_map();
+
+/*
+ * To lock and unlock state and open-count
+ */
+#define	device_lock(device)	simple_lock(&(device)->lock)
+#define	device_unlock(device)	simple_unlock(&(device)->lock)
+
+#endif	/* _DEVICE_DEV_HDR_H_ */