2003-11-16 06:11:26 +00:00
|
|
|
/*-
|
|
|
|
|
* Copyright (c) 2003 Alan L. Cox <alc@cs.rice.edu>
|
|
|
|
|
* All rights reserved.
|
|
|
|
|
*
|
|
|
|
|
* Redistribution and use in source and binary forms, with or without
|
|
|
|
|
* modification, are permitted provided that the following conditions
|
|
|
|
|
* are met:
|
|
|
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
|
|
|
* notice, this list of conditions and the following disclaimer.
|
|
|
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
|
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
|
|
|
* documentation and/or other materials provided with the distribution.
|
|
|
|
|
*
|
|
|
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
|
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
|
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
|
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
|
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
|
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
|
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
|
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
|
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
|
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
|
|
|
* SUCH DAMAGE.
|
|
|
|
|
*
|
|
|
|
|
* $FreeBSD$
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
#ifndef _MACHINE_SF_BUF_H_
|
|
|
|
|
#define _MACHINE_SF_BUF_H_
|
|
|
|
|
|
|
|
|
|
#include <vm/vm.h>
|
|
|
|
|
#include <vm/vm_param.h>
|
|
|
|
|
#include <vm/vm_page.h>
|
|
|
|
|
|
2004-04-18 06:24:51 +00:00
|
|
|
/*
|
|
|
|
|
* On this machine, the only purpose for which sf_buf is used is to implement
|
|
|
|
|
* an opaque pointer required by the machine-independent parts of the kernel.
|
|
|
|
|
* That pointer references the vm_page that is "mapped" by the sf_buf. The
|
|
|
|
|
* actual mapping is provided by the direct virtual-to-physical mapping.
|
|
|
|
|
*/
|
|
|
|
|
struct sf_buf;
|
2003-11-16 06:11:26 +00:00
|
|
|
|
|
|
|
|
static __inline vm_offset_t
|
|
|
|
|
sf_buf_kva(struct sf_buf *sf)
|
|
|
|
|
{
|
|
|
|
|
|
2004-04-18 06:24:51 +00:00
|
|
|
return (ALPHA_PHYS_TO_K0SEG(VM_PAGE_TO_PHYS((vm_page_t)sf)));
|
2003-11-16 06:11:26 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
static __inline vm_page_t
|
|
|
|
|
sf_buf_page(struct sf_buf *sf)
|
|
|
|
|
{
|
|
|
|
|
|
2004-04-18 06:24:51 +00:00
|
|
|
return ((vm_page_t)sf);
|
2003-11-16 06:11:26 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
#endif /* !_MACHINE_SF_BUF_H_ */
|
