projects / apple / xnu.git / blame
| Commit | Line | Data |
|---|---|---|
| 1c79356b | 1 | /* |
| fe8ab488 | 2 | * Copyright (c) 2000-2013 Apple Inc. All rights reserved. |
| 5d5c5d0d | 3 | * |
| 2d21ac55 | 4 | * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ |
| 1c79356b | 5 | * |
| 2d21ac55 A |
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. | |
| 8f6c56a5 | 14 | * |
| 2d21ac55 A |
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 | |
| 8f6c56a5 A |
20 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
| 21 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, | |
| 2d21ac55 A |
22 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. |
| 23 | * Please see the License for the specific language governing rights and | |
| 24 | * limitations under the License. | |
| 8f6c56a5 | 25 | * |
| 2d21ac55 | 26 | * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ |
| 1c79356b | 27 | */ |
| 1c79356b | 28 | |
| fe8ab488 | 29 | #include <vm/vm_page.h> |
| 1c79356b | 30 | |
| fe8ab488 A |
31 | #define VM_GHOST_OFFSET_BITS 39 |
| 32 | #define VM_GHOST_OFFSET_MASK 0x7FFFFFFFFF | |
| 33 | #define VM_GHOST_PAGES_PER_ENTRY 4 | |
| 34 | #define VM_GHOST_PAGE_MASK 0x3 | |
| 35 | #define VM_GHOST_PAGE_SHIFT 2 | |
| 36 | #define VM_GHOST_INDEX_BITS (64 - VM_GHOST_OFFSET_BITS - VM_GHOST_PAGES_PER_ENTRY) | |
| 1c79356b | 37 | |
| fe8ab488 A |
38 | struct vm_ghost |
| 39 | { | |
| 40 | uint64_t g_next_index:VM_GHOST_INDEX_BITS, | |
| 41 | g_pages_held:VM_GHOST_PAGES_PER_ENTRY, | |
| 42 | g_obj_offset:VM_GHOST_OFFSET_BITS; | |
| 43 | uint32_t g_obj_id; | |
| 1c79356b | 44 | |
| fe8ab488 | 45 | } __attribute__((packed)); |
| 1c79356b | 46 | |
| fe8ab488 | 47 | typedef struct vm_ghost *vm_ghost_t; |
| 0b4e3aa0 | 48 | |
| 1c79356b | 49 | |
| fe8ab488 A |
50 | extern void vm_phantom_cache_init(void); |
| 51 | extern void vm_phantom_cache_add_ghost(vm_page_t); | |
| 52 | extern vm_ghost_t vm_phantom_cache_lookup_ghost(vm_page_t, uint32_t); | |
| 53 | extern void vm_phantom_cache_update(vm_page_t); | |
| 54 | extern boolean_t vm_phantom_cache_check_pressure(void); | |
| 55 | extern void vm_phantom_cache_restart_sample(void); |