From f07a4c844da9f0ecae5bbee1ab94be56505f26f7 Mon Sep 17 00:00:00 2001
From: Thomas Bushnell <thomas@gnu.org>
Date: Tue, 25 Feb 1997 21:28:37 +0000
Subject: Initial source

---
 device/buf.h | 102 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 102 insertions(+)
 create mode 100644 device/buf.h

(limited to 'device/buf.h')

diff --git a/device/buf.h b/device/buf.h
new file mode 100644
index 0000000..cf34694
--- /dev/null
+++ b/device/buf.h
@@ -0,0 +1,102 @@
+/* 
+ * 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: 	3/90
+ *
+ * 	Definitions to make new IO structures look like old ones
+ */
+
+/*
+ * io_req and fields
+ */
+#include <device/io_req.h>
+
+#define	buf	io_req
+
+/*
+ * Redefine fields for drivers using old names
+ */
+#define	b_flags		io_op
+#define	b_bcount	io_count
+#define	b_error		io_error
+#define	b_dev		io_unit
+#define	b_blkno		io_recnum
+#define	b_resid		io_residual
+#define	b_un		io_un
+#define	b_addr		data
+#define	av_forw		io_next
+#define	av_back		io_prev
+#define b_physblock     io_physrec
+#define b_blocktotal    io_rectotal
+
+/*
+ * Redefine fields for driver request list heads, using old names.
+ */
+#define	b_actf		io_next
+#define	b_actl		io_prev
+#define	b_forw		io_link
+#define	b_back		io_rlink
+#define	b_active	io_count
+#define	b_errcnt	io_residual
+#define	b_bufsize	io_alloc_size
+
+/*
+ * Redefine flags
+ */
+#define	B_WRITE		IO_WRITE
+#define	B_READ		IO_READ
+#define	B_OPEN		IO_OPEN
+#define	B_DONE		IO_DONE
+#define	B_ERROR		IO_ERROR
+#define	B_BUSY		IO_BUSY
+#define	B_WANTED	IO_WANTED
+#define	B_BAD		IO_BAD
+#define	B_CALL		IO_CALL
+
+#define	B_MD1		IO_SPARE_START
+
+/*
+ * Redefine uio structure
+ */
+#define	uio	io_req
+
+/*
+ * Redefine physio routine
+ */
+#define	physio(strat, xbuf, dev, ops, minphys, ior) \
+		block_io(strat, minphys, ior)
+
+/*
+ * Export standard minphys routine.
+ */
+extern	minphys();
+
+/*
+ * Alternate name for iodone
+ */
+#define	biodone	iodone
+#define biowait iowait
-- 
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