xref: /freebsd-10-stable/sys/ia64/include/sf_buf.h

/*-
 * 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: head/sys/ia64/include/sf_buf.h 122780 2003-11-16 06:11:26Z alc $
 */

#ifndef _MACHINE_SF_BUF_H_
#define _MACHINE_SF_BUF_H_

#include <sys/queue.h>

#include <vm/vm.h>
#include <vm/vm_param.h>
#include <vm/vm_page.h>

struct sf_buf {
	SLIST_ENTRY(sf_buf) free_list;	/* list of free buffer slots */
	vm_page_t m;			/* currently mapped page */
};

static __inline vm_offset_t
sf_buf_kva(struct sf_buf *sf)
{

	return (IA64_PHYS_TO_RR7(sf->m->phys_addr));
}

static __inline vm_page_t
sf_buf_page(struct sf_buf *sf)
{

	return (sf->m);
}

#endif /* !_MACHINE_SF_BUF_H_ */