FreeBSD/Linux Kernel Cross Reference
sys/vm/vm_reserv.h

     /*-
      * Copyright (c) 2002-2006 Rice University
      * Copyright (c) 2007-2008 Alan L. Cox <alc@cs.rice.edu>
      * All rights reserved.
      *
      * This software was developed for the FreeBSD Project by Alan L. Cox,
      * Olivier Crameri, Peter Druschel, Sitaram Iyer, and Juan Navarro.
      *
      * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT
     * HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
     * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
     * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
     * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
     * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
     * WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     * POSSIBILITY OF SUCH DAMAGE.
     *
     * $FreeBSD: releng/11.0/sys/vm/vm_reserv.h 292469 2015-12-19 18:42:50Z alc $
     */
    
    /*
     *      Superpage reservation management definitions
     */
    
    #ifndef _VM_RESERV_H_
    #define _VM_RESERV_H_
    
    #ifdef _KERNEL
    
    #if VM_NRESERVLEVEL > 0
    
    /*
     * The following functions are only to be used by the virtual memory system.
     */
    vm_page_t       vm_reserv_alloc_contig(vm_object_t object, vm_pindex_t pindex,
                        u_long npages, vm_paddr_t low, vm_paddr_t high,
                        u_long alignment, vm_paddr_t boundary);
    vm_page_t       vm_reserv_alloc_page(vm_object_t object, vm_pindex_t pindex,
                        vm_page_t mpred);
    void            vm_reserv_break_all(vm_object_t object);
    boolean_t       vm_reserv_free_page(vm_page_t m);
    void            vm_reserv_init(void);
    bool            vm_reserv_is_page_free(vm_page_t m);
    int             vm_reserv_level(vm_page_t m);
    int             vm_reserv_level_iffullpop(vm_page_t m);
    boolean_t       vm_reserv_reactivate_page(vm_page_t m);
    boolean_t       vm_reserv_reclaim_contig(u_long npages, vm_paddr_t low,
                        vm_paddr_t high, u_long alignment, vm_paddr_t boundary);
    boolean_t       vm_reserv_reclaim_inactive(void);
    void            vm_reserv_rename(vm_page_t m, vm_object_t new_object,
                        vm_object_t old_object, vm_pindex_t old_object_offset);
    int             vm_reserv_size(int level);
    vm_paddr_t      vm_reserv_startup(vm_offset_t *vaddr, vm_paddr_t end,
                        vm_paddr_t high_water);
    
    #endif  /* VM_NRESERVLEVEL > 0 */
    #endif  /* _KERNEL */
    #endif  /* !_VM_RESERV_H_ */

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