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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: 3/90
*
* Definitions to make new IO structures look like old ones
*/
#ifndef _DEVICE_BUF_H_
#define _DEVICE_BUF_H_
/*
* 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 void minphys(io_req_t);
/*
* Alternate name for iodone
*/
#define biodone iodone
#define biowait iowait
#endif /* _DEVICE_BUF_H_ */
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