93 lines
2.6 KiB
C
Executable File
93 lines
2.6 KiB
C
Executable File
/* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
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/* All Rights Reserved */
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/* THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF AT&T */
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/* The copyright notice above does not evidence any */
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/* actual or intended publication of such source code. */
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/*
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* +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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* PROPRIETARY NOTICE (Combined)
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*
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* This source code is unpublished proprietary information
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* constituting, or derived under license from AT&T's UNIX(r) System V.
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* In addition, portions of such source code were derived from Berkeley
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* 4.3 BSD under license from the Regents of the University of
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* California.
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*
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*
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*
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* Copyright Notice
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*
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* Notice of copyright on this source code product does not indicate
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* publication.
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*
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* (c) 1986,1987,1988,1989,1990 Sun Microsystems, Inc
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* (c) 1983,1984,1985,1986,1987,1988,1989 AT&T.
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* All rights reserved.
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*
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*/
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#ifndef _VM_SEG_DEV_H
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#define _VM_SEG_DEV_H
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#pragma ident "@(#)seg_dev.h 1.25 95/01/12 SMI"
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/* From: SVr4.0 "kernel:vm/seg_dev.h 1.8" */
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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* Structure whose pointer is passed to the segdev_create routine
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*/
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struct segdev_crargs {
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int (*mapfunc)(dev_t dev, off_t off, int prot); /* map function */
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u_int offset; /* starting offset */
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dev_t dev; /* device number */
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u_char prot; /* protection */
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u_char maxprot; /* maximum protection */
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u_int hat_flags; /* hat flags */
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};
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/*
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* (Semi) private data maintained by the seg_dev driver per segment mapping
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*
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* The segment lock is necessary to protect fields that are modified
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* when the "read" version of the address space lock is held. This lock
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* is not needed when the segment operation has the "write" version of
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* the address space lock (it would be redundant).
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*
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* The following fields in segdev_data are read-only when the address
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* space is "read" locked, and don't require the segment lock:
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*
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* vp
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* offset
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* mapfunc
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* maxprot
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*/
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struct segdev_data {
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kmutex_t lock; /* protects segdev_data */
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int (*mapfunc)(dev_t dev, off_t off, int prot);
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/* really returns struct pte, not int */
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u_int offset; /* device offset for start of mapping */
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struct vnode *vp; /* vnode associated with device */
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u_char pageprot; /* true if per page protections present */
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u_char prot; /* current segment prot if pageprot == 0 */
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u_char maxprot; /* maximum segment protections */
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struct vpage *vpage; /* per-page information, if needed */
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u_int hat_flags; /* hat flags */
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};
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#ifdef _KERNEL
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extern int segdev_create(struct seg *, void *);
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#endif /* _KERNEL */
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#ifdef __cplusplus
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}
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#endif
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#endif /* _VM_SEG_DEV_H */
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