diff options
Diffstat (limited to 'device/buf.h')
| -rw-r--r-- | device/buf.h | 102 |
1 files changed, 102 insertions, 0 deletions
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 |