libsyscall/mach/mach/vm_page_size.h

   1 /*
   2  * Copyright (c) 2013 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28
  29 #ifndef _VM_PAGE_SIZE_H_
  30 #define _VM_PAGE_SIZE_H_
  31
  32 #include <Availability.h>
  33 #include <mach/mach_types.h>
  34
  35 __BEGIN_DECLS
  36
  37 extern  vm_size_t       vm_kernel_page_size     __OSX_AVAILABLE_STARTING(__MAC_10_9, __IPHONE_7_0);
  38 extern  vm_size_t       vm_kernel_page_mask     __OSX_AVAILABLE_STARTING(__MAC_10_9, __IPHONE_7_0);
  39 extern  int             vm_kernel_page_shift    __OSX_AVAILABLE_STARTING(__MAC_10_9, __IPHONE_7_0);
  40
  41 #define trunc_page_kernel(x)   ((x) & (~vm_kernel_page_mask))
  42 #define round_page_kernel(x)   trunc_kernel_page((x) + vm_kernel_page_mask)
  43
  44 __END_DECLS
  45
  46 #endif