6eb9ee7cd8
level directly, instead of making the caller wrap the calls in splimp()/splx(). - Add a comment documenting that interrupts that cause memory allocation must be blocked while the free page queue is locked. Since interrupts must be blocked while this lock is asserted, tying them together like this helps to prevent mistakes.
130 lines
4.9 KiB
C
130 lines
4.9 KiB
C
/* $NetBSD: uvm_page.h,v 1.12 1999/05/24 19:10:57 thorpej Exp $ */
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/*
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* Copyright (c) 1997 Charles D. Cranor and Washington University.
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* Copyright (c) 1991, 1993, The Regents of the University of California.
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*
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* The Mach Operating System project at Carnegie-Mellon University.
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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,
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* Washington University, the University of California, Berkeley and
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* its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, 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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* @(#)vm_page.h 7.3 (Berkeley) 4/21/91
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* from: Id: uvm_page.h,v 1.1.2.6 1998/02/04 02:31:42 chuck Exp
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*
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*
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* Copyright (c) 1987, 1990 Carnegie-Mellon University.
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* All rights reserved.
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*
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* Permission to use, copy, modify and distribute this software and
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* its documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation.
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*
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* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
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* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
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* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* Carnegie Mellon requests users of this software to return to
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*
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* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
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* School of Computer Science
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* Carnegie Mellon University
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* Pittsburgh PA 15213-3890
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*
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* any improvements or extensions that they make and grant Carnegie the
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* rights to redistribute these changes.
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*/
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#ifndef _UVM_UVM_PAGE_H_
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#define _UVM_UVM_PAGE_H_
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/*
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* uvm_page.h
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*/
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/*
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* macros
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*/
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#define uvm_lock_pageq() simple_lock(&uvm.pageqlock)
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#define uvm_unlock_pageq() simple_unlock(&uvm.pageqlock)
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#define uvm_pagehash(obj,off) \
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(((unsigned long)obj+(unsigned long)atop(off)) & uvm.page_hashmask)
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/*
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* handle inline options
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*/
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#ifdef UVM_PAGE_INLINE
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#define PAGE_INLINE static __inline
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#else
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#define PAGE_INLINE /* nothing */
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#endif /* UVM_PAGE_INLINE */
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/*
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* prototypes: the following prototypes define the interface to pages
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*/
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void uvm_page_init __P((vaddr_t *, vaddr_t *));
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#if defined(UVM_PAGE_TRKOWN)
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void uvm_page_own __P((struct vm_page *, char *));
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#endif
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#if !defined(PMAP_STEAL_MEMORY)
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boolean_t uvm_page_physget __P((paddr_t *));
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#endif
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void uvm_page_rehash __P((void));
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PAGE_INLINE int uvm_lock_fpageq __P((void));
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PAGE_INLINE void uvm_unlock_fpageq __P((int));
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PAGE_INLINE void uvm_pageactivate __P((struct vm_page *));
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vaddr_t uvm_pageboot_alloc __P((vsize_t));
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PAGE_INLINE void uvm_pagecopy __P((struct vm_page *, struct vm_page *));
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PAGE_INLINE void uvm_pagedeactivate __P((struct vm_page *));
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void uvm_pagefree __P((struct vm_page *));
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PAGE_INLINE struct vm_page *uvm_pagelookup
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__P((struct uvm_object *, vaddr_t));
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void uvm_pageremove __P((struct vm_page *));
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/* uvm_pagerename: not needed */
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PAGE_INLINE void uvm_pageunwire __P((struct vm_page *));
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PAGE_INLINE void uvm_pagewait __P((struct vm_page *, int));
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PAGE_INLINE void uvm_pagewake __P((struct vm_page *));
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PAGE_INLINE void uvm_pagewire __P((struct vm_page *));
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PAGE_INLINE void uvm_pagezero __P((struct vm_page *));
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PAGE_INLINE int uvm_page_lookup_freelist __P((struct vm_page *));
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#endif /* _UVM_UVM_PAGE_H_ */
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