9fc453562f
The poorly named uvm.h is generally supposed to be for uvm-internal users only. - Narrow it to files that actually need it -- mostly files that need to query whether curlwp is the pagedaemon, which should maybe be exposed by an external header. - Use uvm_extern.h where feasible and uvm_*.h for things not exposed by it. We should split up uvm_extern.h but this will serve for now to reduce the uvm.h dependencies. - Use uvm_stat.h and #ifdef UVMHIST uvm.h for files that use UVMHIST(ubchist), since ubchist is declared in uvm.h but the reference evaporates if UVMHIST is not defined, so we reduce header file dependencies. - Make uvm_device.h and uvm_swap.h independently includable while here. ok chs@
69 lines
2.3 KiB
C
69 lines
2.3 KiB
C
/* $NetBSD: uvm_swap.h,v 1.26 2020/09/05 16:30:13 riastradh Exp $ */
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/*
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* Copyright (c) 1997 Matthew R. Green
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: Id: uvm_swap.h,v 1.1.2.6 1997/12/15 05:39:31 mrg Exp
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*/
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#ifndef _UVM_UVM_SWAP_H_
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#define _UVM_UVM_SWAP_H_
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#define SWSLOT_BAD (-1)
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#if defined(_KERNEL) || defined(_MODULE)
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#if defined(_KERNEL_OPT)
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#include "opt_vmswap.h"
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#endif
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struct lwp;
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#if defined(VMSWAP)
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struct swapent;
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struct vm_page;
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int uvm_swap_get(struct vm_page *, int, int);
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int uvm_swap_put(int, struct vm_page **, int, int);
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int uvm_swap_alloc(int *, bool);
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void uvm_swap_free(int, int);
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void uvm_swap_markbad(int, int);
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bool uvm_swapisfull(void);
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void swapsys_lock(krw_t);
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void swapsys_unlock(void);
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int uvm_swap_stats(char *, int,
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void (*)(void *, const struct swapent *), size_t, register_t *);
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#else /* defined(VMSWAP) */
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#define uvm_swapisfull() true
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#define uvm_swap_stats(c, l, f, count, retval) (__used f, *retval = 0, ENOSYS)
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#endif /* defined(VMSWAP) */
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void uvm_swap_shutdown(struct lwp *);
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#endif /* _KERNEL || _MODULE */
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#endif /* _UVM_UVM_SWAP_H_ */
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