The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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

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    1 /*-
    2  * Copyright (c) 2002-2006 Rice University
    3  * Copyright (c) 2007-2008 Alan L. Cox <alc@cs.rice.edu>
    4  * All rights reserved.
    5  *
    6  * This software was developed for the FreeBSD Project by Alan L. Cox,
    7  * Olivier Crameri, Peter Druschel, Sitaram Iyer, and Juan Navarro.
    8  *
    9  * Redistribution and use in source and binary forms, with or without
   10  * modification, are permitted provided that the following conditions
   11  * are met:
   12  * 1. Redistributions of source code must retain the above copyright
   13  *    notice, this list of conditions and the following disclaimer.
   14  * 2. Redistributions in binary form must reproduce the above copyright
   15  *    notice, this list of conditions and the following disclaimer in the
   16  *    documentation and/or other materials provided with the distribution.
   17  *
   18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   19  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
   21  * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT
   22  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
   23  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
   24  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
   25  * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
   26  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
   28  * WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   29  * POSSIBILITY OF SUCH DAMAGE.
   30  *
   31  * $FreeBSD$
   32  */
   33 
   34 /*
   35  *      Superpage reservation management definitions
   36  */
   37 
   38 #ifndef _VM_RESERV_H_
   39 #define _VM_RESERV_H_
   40 
   41 #ifdef _KERNEL
   42 
   43 #if VM_NRESERVLEVEL > 0
   44 
   45 /*
   46  * The following functions are only to be used by the virtual memory system.
   47  */
   48 vm_page_t       vm_reserv_alloc_contig(vm_object_t object, vm_pindex_t pindex,
   49                     u_long npages, vm_paddr_t low, vm_paddr_t high,
   50                     u_long alignment, vm_paddr_t boundary, vm_page_t mpred);
   51 vm_page_t       vm_reserv_alloc_page(vm_object_t object, vm_pindex_t pindex,
   52                     vm_page_t mpred);
   53 void            vm_reserv_break_all(vm_object_t object);
   54 boolean_t       vm_reserv_free_page(vm_page_t m);
   55 void            vm_reserv_init(void);
   56 bool            vm_reserv_is_page_free(vm_page_t m);
   57 int             vm_reserv_level(vm_page_t m);
   58 int             vm_reserv_level_iffullpop(vm_page_t m);
   59 boolean_t       vm_reserv_reclaim_contig(u_long npages, vm_paddr_t low,
   60                     vm_paddr_t high, u_long alignment, vm_paddr_t boundary);
   61 boolean_t       vm_reserv_reclaim_inactive(void);
   62 void            vm_reserv_rename(vm_page_t m, vm_object_t new_object,
   63                     vm_object_t old_object, vm_pindex_t old_object_offset);
   64 int             vm_reserv_size(int level);
   65 vm_paddr_t      vm_reserv_startup(vm_offset_t *vaddr, vm_paddr_t end,
   66                     vm_paddr_t high_water);
   67 vm_page_t       vm_reserv_to_superpage(vm_page_t m);
   68 
   69 #endif  /* VM_NRESERVLEVEL > 0 */
   70 #endif  /* _KERNEL */
   71 #endif  /* !_VM_RESERV_H_ */

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