text: /*-
   * 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: release/9.1.0/sys/mips/include/sf_buf.h 217944 2011-01-27 14:49:22Z jchandra $
   */
  
  #ifndef _MACHINE_SF_BUF_H_
  #define _MACHINE_SF_BUF_H_
  
  #ifdef __mips_n64
  #include <vm/vm.h>
  #include <vm/vm_param.h>
  #include <vm/vm_page.h>
  #else
  #include <sys/queue.h>
  #endif
  
  #ifdef __mips_n64
  /* In 64 bit the whole memory is directly mapped */
  struct	sf_buf;
  
  static __inline vm_offset_t
  sf_buf_kva(struct sf_buf *sf)
  {
  	vm_page_t	m;
  
  	m = (vm_page_t)sf;
  	return (MIPS_PHYS_TO_DIRECT(VM_PAGE_TO_PHYS(m)));
  }
  
  static __inline struct vm_page *
  sf_buf_page(struct sf_buf *sf)
  {
  
  	return ((vm_page_t)sf);
  }
  
  #else /* ! __mips_n64 */
  struct vm_page;
  
  struct sf_buf {
  	SLIST_ENTRY(sf_buf) free_list;	/* list of free buffer slots */
  	struct		vm_page *m;	/* currently mapped page */
  	vm_offset_t	kva;		/* va of mapping */
  };
  
  static __inline vm_offset_t
  sf_buf_kva(struct sf_buf *sf)
  {
  
  	return (sf->kva);
  }
  
  static __inline struct vm_page *
  sf_buf_page(struct sf_buf *sf)
  {
  
  	return (sf->m);
  }
  #endif /* __mips_n64 */
  
  #endif /* !_MACHINE_SF_BUF_H_ */
  