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freebsd
GitHub Repository: freebsd/freebsd-src
 Path: blob/main/sys/vm/vm_reserv.h
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/*-

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 * SPDX-License-Identifier: BSD-2-Clause

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 *

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 * Copyright (c) 2002-2006 Rice University

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 * Copyright (c) 2007-2008 Alan L. Cox <[email protected]>

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 * All rights reserved.

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 *

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 * This software was developed for the FreeBSD Project by Alan L. Cox,

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 * Olivier Crameri, Peter Druschel, Sitaram Iyer, and Juan Navarro.

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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 COPYRIGHT HOLDERS AND CONTRIBUTORS

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 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

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 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

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 * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT

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 * HOLDERS OR CONTRIBUTORS 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; LOSS

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 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED

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 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY

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 * WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

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 * POSSIBILITY OF SUCH DAMAGE.

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 */

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/*

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 *	Superpage reservation management definitions

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 */

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#ifndef	_VM_RESERV_H_

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#define	_VM_RESERV_H_

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#ifdef _KERNEL

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#if VM_NRESERVLEVEL > 0

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/*

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 * The following functions are only to be used by the virtual memory system.

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 */

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vm_page_t	vm_reserv_alloc_contig(vm_object_t object, vm_pindex_t pindex,

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		    int domain, int req, u_long npages, vm_paddr_t low,

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		    vm_paddr_t high, u_long alignment, vm_paddr_t boundary,

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		    struct pctrie_iter *pages);

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vm_page_t	vm_reserv_alloc_page(vm_object_t object, vm_pindex_t pindex,

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		    int domain, int req, struct pctrie_iter *pages);

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void		vm_reserv_break_all(vm_object_t object);

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boolean_t	vm_reserv_free_page(vm_page_t m);

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void		vm_reserv_init(void);

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bool		vm_reserv_is_page_free(vm_page_t m);

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bool		vm_reserv_is_populated(vm_page_t m, int npages);

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int		vm_reserv_level(vm_page_t m);

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int		vm_reserv_level_iffullpop(vm_page_t m);

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vm_page_t	vm_reserv_reclaim_contig(int domain, u_long npages,

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		    vm_paddr_t low, vm_paddr_t high, u_long alignment,

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		    vm_paddr_t boundary);

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bool		vm_reserv_reclaim_inactive(int domain);

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void		vm_reserv_rename(vm_page_t m, vm_object_t new_object,

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		    vm_object_t old_object, vm_pindex_t old_object_offset);

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int		vm_reserv_size(int level);

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vm_paddr_t	vm_reserv_startup(vm_offset_t *vaddr, vm_paddr_t end);

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vm_page_t	vm_reserv_to_superpage(vm_page_t m);

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#endif	/* VM_NRESERVLEVEL > 0 */

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#endif	/* _KERNEL */

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#endif	/* !_VM_RESERV_H_ */

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