1/*
2 * Copyright (c) 1990 University of Utah.
3 * Copyright (c) 1991 The Regents of the University of California.
4 * All rights reserved.
5 *
6 * This code is derived from software contributed to Berkeley by
7 * the Systems Programming Group of the University of Utah Computer
8 * Science Department.

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31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * SUCH DAMAGE.
37 *
38 * from: @(#)swap_pager.h 7.1 (Berkeley) 12/5/90
39 * $Id: swap_pager.h,v 1.6 1995/05/10 18:56:04 davidg Exp $
40 */
41
42/*
43 * Modifications to the block allocation data structure by John S. Dyson
44 * 18 Dec 93.
45 */
46
47#ifndef _SWAP_PAGER_

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62 int swb_block[SWB_NPAGES]; /* unfortunately int instead of daddr_t */
63};
64typedef struct swblock *sw_blk_t;
65
66/*
67 * Swap pager private data.
68 */
69struct swpager {
70 int sw_nblocks; /* number of blocks in list (sw_blk_t units) */
71 int sw_allocsize; /* amount of space actually allocated */
72 sw_blk_t sw_blocks; /* pointer to list of swap blocks */
73 short sw_poip; /* pageouts in progress */
74 short sw_piip; /* pageins in progress */
75};
76typedef struct swpager *sw_pager_t;
77
78#ifdef KERNEL
79void swap_pager_init __P((void));
80vm_object_t swap_pager_alloc __P((void *, vm_size_t, vm_prot_t, vm_offset_t));
81void swap_pager_dealloc __P((vm_object_t));
82int swap_pager_getpages __P((vm_object_t, vm_page_t *, int, int));
83int swap_pager_putpages __P((vm_object_t, vm_page_t *, int, boolean_t, int *));
84boolean_t swap_pager_haspage __P((vm_object_t, vm_offset_t, int *, int *));
85void swap_pager_sync __P((void));
86void swap_pager_iodone __P((struct buf *));
87int swap_pager_swp_alloc __P((vm_object_t, int));
88void swap_pager_copy __P((vm_object_t, vm_offset_t, vm_object_t, vm_offset_t, vm_offset_t));
89void swap_pager_freespace __P((vm_object_t, vm_offset_t, vm_offset_t));
90void swap_pager_swap_init __P((void));
91#endif
92
93#endif /* _SWAP_PAGER_ */