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| 1 | 13 | up20180614 | /* $NetBSD: uvm_aobj.h,v 1.23 2013/10/18 17:48:44 christos Exp $ */
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| 2 | |||
| 3 | /*
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| 4 | * Copyright (c) 1998 Chuck Silvers, Charles D. Cranor and
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| 5 | * Washington University.
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| 6 | * All rights reserved.
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| 7 | *
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| 8 | * Redistribution and use in source and binary forms, with or without
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| 9 | * modification, are permitted provided that the following conditions
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| 10 | * are met:
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| 11 | * 1. Redistributions of source code must retain the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer.
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| 13 | * 2. Redistributions in binary form must reproduce the above copyright
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| 14 | * notice, this list of conditions and the following disclaimer in the
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| 15 | * documentation and/or other materials provided with the distribution.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | *
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| 28 | * from: Id: uvm_aobj.h,v 1.1.2.4 1998/02/06 05:19:28 chs Exp
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| 29 | */
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| 30 | /*
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| 31 | * uvm_aobj.h: anonymous memory uvm_object pager
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| 32 | *
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| 33 | * author: Chuck Silvers <chuq@chuq.com>
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| 34 | * started: Jan-1998
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| 35 | *
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| 36 | * - design mostly from Chuck Cranor
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| 37 | */
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| 38 | |||
| 39 | #ifndef _UVM_UVM_AOBJ_H_
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| 40 | #define _UVM_UVM_AOBJ_H_
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| 41 | |||
| 42 | /*
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| 43 | * Flags for uao_create: UAO_FLAG_KERNOBJ and UAO_FLAG_KERNSWAP are
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| 44 | * used only once, to initialise UVM.
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| 45 | */
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| 46 | #define UAO_FLAG_KERNOBJ 0x1 /* create kernel object */ |
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| 47 | #define UAO_FLAG_KERNSWAP 0x2 /* enable kernel swap */ |
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| 48 | #define UAO_FLAG_NOSWAP 0x8 /* aobj may not swap */ |
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| 49 | |||
| 50 | #ifdef _KERNEL
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| 51 | #if defined(_KERNEL_OPT)
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| 52 | #include "opt_vmswap.h" |
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| 53 | #endif
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| 54 | |||
| 55 | void uao_init(void); |
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| 56 | int uao_set_swslot(struct uvm_object *, int, int); |
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| 57 | |||
| 58 | #if defined(VMSWAP)
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| 59 | int uao_find_swslot(struct uvm_object *, int); |
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| 60 | void uao_dropswap(struct uvm_object *, int); |
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| 61 | bool uao_swap_off(int, int); |
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| 62 | void uao_dropswap_range(struct uvm_object *, voff_t, voff_t); |
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| 63 | #else
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| 64 | #define uao_find_swslot(obj, off) (__USE(off), 0) |
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| 65 | #define uao_dropswap(obj, off) /* nothing */ |
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| 66 | #define uao_dropswap_range(obj, lo, hi) /* nothing */ |
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| 67 | #endif
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| 68 | |||
| 69 | #endif /* _KERNEL */ |
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| 70 | |||
| 71 | #endif /* _UVM_UVM_AOBJ_H_ */ |