/* * 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, * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. * * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */ #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