/* * Copyright (c) 2000-2013 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@ */ #include <vm/vm_page.h> #define VM_GHOST_OFFSET_BITS 39 #define VM_GHOST_OFFSET_MASK 0x7FFFFFFFFF #define VM_GHOST_PAGES_PER_ENTRY 4 #define VM_GHOST_PAGE_MASK 0x3 #define VM_GHOST_PAGE_SHIFT 2 #define VM_GHOST_INDEX_BITS (64 - VM_GHOST_OFFSET_BITS - VM_GHOST_PAGES_PER_ENTRY) struct vm_ghost { uint64_t g_next_index:VM_GHOST_INDEX_BITS, g_pages_held:VM_GHOST_PAGES_PER_ENTRY, g_obj_offset:VM_GHOST_OFFSET_BITS; uint32_t g_obj_id; } __attribute__((packed)); typedef struct vm_ghost *vm_ghost_t; extern void vm_phantom_cache_init(void); extern void vm_phantom_cache_add_ghost(vm_page_t); extern vm_ghost_t vm_phantom_cache_lookup_ghost(vm_page_t, uint32_t); extern void vm_phantom_cache_update(vm_page_t); extern boolean_t vm_phantom_cache_check_pressure(void); extern void vm_phantom_cache_restart_sample(void);