/*
* Copyright (c) 2013 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* compliance with the License. The rights granted to you under the License
* may not be used to create, or enable the creation or redistribution of,
* unlawful or unlicensed copies of an Apple operating system, or to
* circumvent, violate, or enable the circumvention or violation of, any
* terms of an Apple operating system software license agreement.
*
* Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this file.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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*/
#ifndef _VM_PAGE_SIZE_H_
#define _VM_PAGE_SIZE_H_
#include <Availability.h>
#include <mach/mach_types.h>
#include <sys/cdefs.h>
__BEGIN_DECLS
/*
* Globally interesting numbers.
* These macros assume vm_page_size is a power-of-2.
*/
extern vm_size_t vm_page_size;
extern vm_size_t vm_page_mask;
extern int vm_page_shift;
/*
* These macros assume vm_page_size is a power-of-2.
*/
#define trunc_page(x) ((x) & (~(vm_page_size - 1)))
#define round_page(x) trunc_page((x) + (vm_page_size - 1))
/*
* Page-size rounding macros for the fixed-width VM types.
*/
#define mach_vm_trunc_page(x) ((mach_vm_offset_t)(x) & ~((signed)vm_page_mask))
#define mach_vm_round_page(x) (((mach_vm_offset_t)(x) + vm_page_mask) & ~((signed)vm_page_mask))
extern vm_size_t vm_kernel_page_size __OSX_AVAILABLE_STARTING(__MAC_10_9, __IPHONE_7_0);
extern vm_size_t vm_kernel_page_mask __OSX_AVAILABLE_STARTING(__MAC_10_9, __IPHONE_7_0);
extern int vm_kernel_page_shift __OSX_AVAILABLE_STARTING(__MAC_10_9, __IPHONE_7_0);
#define trunc_page_kernel(x) ((x) & (~vm_kernel_page_mask))
#define round_page_kernel(x) trunc_page_kernel((x) + vm_kernel_page_mask)
__END_DECLS
#endif