1 | /* |
2 | * Copyright (c) 2015 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, |
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. |
25 | * |
26 | * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ |
27 | */ |
28 | |
29 | #ifndef _SYS_MEMORY_MAINTENANCE_H_ |
30 | #define _SYS_MEMORY_MAINTENANCE_H_ |
31 | |
32 | /* |
33 | * File: sys/memory_maintenance.h |
34 | * Author: Samuel Gosselin [sgosselin@apple.com] |
35 | * |
36 | * Header file for Memory Maintenance support. |
37 | */ |
38 | |
39 | /* |
40 | * The kern.darkboot sysctl can be controlled from kexts or userspace. If |
41 | * processes want to change the sysctl value, they require the |
42 | * 'com.apple.private.kernel.darkboot' entitlement. |
43 | * |
44 | * Operating the kern.darkboot sysctl is done via using the commands below: |
45 | * |
46 | * - MEMORY_MAINTENANCE_DARK_BOOT_UNSET |
47 | * Unset the kern.darkboot sysctl (kern.sysctl=0). |
48 | * - MEMORY_MAINTENANCE_DARK_BOOT_SET |
49 | * Set the kern.darkboot sysctl (kern.sysctl=1). |
50 | * - MEMORY_MAINTENANCE_DARK_BOOT_SET_PERSISTENT |
51 | * Set the kern.darkboot sysctl (kern.sysctl=1) and save its |
52 | * value into the 'darkboot' NVRAM variable. |
53 | * |
54 | * Example: |
55 | * sysctl kern.darkboot=2 |
56 | */ |
57 | #define MEMORY_MAINTENANCE_DARK_BOOT_UNSET (0) |
58 | #define MEMORY_MAINTENANCE_DARK_BOOT_SET (1) |
59 | #define MEMORY_MAINTENANCE_DARK_BOOT_SET_PERSISTENT (2) |
60 | |
61 | #define MEMORY_MAINTENANCE_DARK_BOOT_NVRAM_NAME "darkboot" |
62 | |
63 | #endif /* _SYS_MEMORY_MAINTENANCE_H_ */ |
64 | |