3ebbe095e0
boolean_t pmap_extract(pmap_t, vaddr_t, paddr_t *); This makes it possible for the pmap to map physical address 0.
69 lines
2.4 KiB
C
69 lines
2.4 KiB
C
/* $NetBSD: uvm_pager_i.h,v 1.8 1999/07/08 18:11:03 thorpej Exp $ */
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/*
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*
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* Copyright (c) 1997 Charles D. Cranor and Washington University.
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Charles D. Cranor and
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* Washington University.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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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, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* from: Id: uvm_pager_i.h,v 1.1.2.2 1997/10/09 23:05:46 chuck Exp
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*/
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#ifndef _UVM_UVM_PAGER_I_H_
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#define _UVM_UVM_PAGER_I_H_
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/*
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* uvm_pager_i.h
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*/
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/*
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* inline functions [maybe]
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*/
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#if defined(UVM_PAGER_INLINE) || defined(UVM_PAGER)
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/*
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* uvm_pageratop: convert KVAs in the pager map back to their page
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* structures.
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*/
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PAGER_INLINE struct vm_page *
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uvm_pageratop(kva)
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vaddr_t kva;
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{
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paddr_t pa;
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if (pmap_extract(pmap_kernel(), kva, &pa) == FALSE)
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panic("uvm_pageratop");
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return (PHYS_TO_VM_PAGE(pa));
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}
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#endif /* defined(UVM_PAGER_INLINE) || defined(UVM_PAGER) */
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#endif /* _UVM_UVM_PAGER_I_H_ */
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