/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2004 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#ifndef _SYS_COPYOPS_H
#define _SYS_COPYOPS_H
#pragma ident "%Z%%M% %I% %E% SMI"
#include <sys/types.h>
#include <sys/thread.h>
#include <sys/buf.h>
#include <sys/aio_req.h>
#include <sys/uio.h>
#ifdef __cplusplus
extern "C" {
#endif
#ifdef _KERNEL
/*
* Copy in/out vector operations. This structure is used to interpose
* on the kernel copyin/copyout/etc. operations for various purposes
* such as handling watchpoints in the affected user memory. When one of the
* copy operations causes a fault, the corresponding function in this vector is
* called to handle it.
*
* The 64-bit operations in the structure fetch and store extended
* words and are only used on platforms with 64 bit general
* registers e.g. sun4u.
*
* Since the only users of these interfaces (watchpoints and pxfs) perform the
* default action unless there is a page fault, we can save the overhead of
* having to go through this indirection unless there is a page fault. This
* improves performance both in general and when watchpoints are enabled. If,
* in the future, a consumer relies on being able to interpose on all actions,
* then this assumption will have to be undone.
*
* No consumers should call these functions directly. They are automatically
* handled by the generic versions.
*/
typedef struct copyops {
/*
* unstructured byte copyin/out functions
*/
int (*cp_copyin)(const void *, void *, size_t);
int (*cp_xcopyin)(const void *, void *, size_t);
int (*cp_copyout)(const void *, void *, size_t);
int (*cp_xcopyout)(const void *, void *, size_t);
int (*cp_copyinstr)(const char *, char *, size_t, size_t *);
int (*cp_copyoutstr)(const char *, char *, size_t, size_t *);
/*
* fetch/store byte/halfword/word/extended word
*/
int (*cp_fuword8)(const void *, uint8_t *);
int (*cp_fuword16)(const void *, uint16_t *);
int (*cp_fuword32)(const void *, uint32_t *);
int (*cp_fuword64)(const void *, uint64_t *);
int (*cp_suword8)(void *, uint8_t);
int (*cp_suword16)(void *, uint16_t);
int (*cp_suword32)(void *, uint32_t);
int (*cp_suword64)(void *, uint64_t);
int (*cp_physio)(int (*)(struct buf *), struct buf *, dev_t,
int, void (*)(struct buf *), struct uio *);
} copyops_t;
extern int default_physio(int (*)(struct buf *), struct buf *,
dev_t, int, void (*)(struct buf *), struct uio *);
/*
* Interfaces for installing and removing copyops.
*/
extern void install_copyops(kthread_id_t tp, copyops_t *cp);
extern void remove_copyops(kthread_id_t tp);
extern int copyops_installed(kthread_id_t tp);
#endif /* _KERNEL */
#ifdef __cplusplus
}
#endif
#endif /* _SYS_COPYOPS_H */