1*d8b80295SApple OSS Distributions /* 2*d8b80295SApple OSS Distributions * Copyright (c) 2015 Apple Inc. All rights reserved. 3*d8b80295SApple OSS Distributions * 4*d8b80295SApple OSS Distributions * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5*d8b80295SApple OSS Distributions * 6*d8b80295SApple OSS Distributions * This file contains Original Code and/or Modifications of Original Code 7*d8b80295SApple OSS Distributions * as defined in and that are subject to the Apple Public Source License 8*d8b80295SApple OSS Distributions * Version 2.0 (the 'License'). You may not use this file except in 9*d8b80295SApple OSS Distributions * compliance with the License. The rights granted to you under the License 10*d8b80295SApple OSS Distributions * may not be used to create, or enable the creation or redistribution of, 11*d8b80295SApple OSS Distributions * unlawful or unlicensed copies of an Apple operating system, or to 12*d8b80295SApple OSS Distributions * circumvent, violate, or enable the circumvention or violation of, any 13*d8b80295SApple OSS Distributions * terms of an Apple operating system software license agreement. 14*d8b80295SApple OSS Distributions * 15*d8b80295SApple OSS Distributions * Please obtain a copy of the License at 16*d8b80295SApple OSS Distributions * http://www.opensource.apple.com/apsl/ and read it before using this file. 17*d8b80295SApple OSS Distributions * 18*d8b80295SApple OSS Distributions * The Original Code and all software distributed under the License are 19*d8b80295SApple OSS Distributions * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20*d8b80295SApple OSS Distributions * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21*d8b80295SApple OSS Distributions * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22*d8b80295SApple OSS Distributions * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23*d8b80295SApple OSS Distributions * Please see the License for the specific language governing rights and 24*d8b80295SApple OSS Distributions * limitations under the License. 25*d8b80295SApple OSS Distributions * 26*d8b80295SApple OSS Distributions * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27*d8b80295SApple OSS Distributions */ 28*d8b80295SApple OSS Distributions 29*d8b80295SApple OSS Distributions #ifndef _SYS_MEMORY_MAINTENANCE_H_ 30*d8b80295SApple OSS Distributions #define _SYS_MEMORY_MAINTENANCE_H_ 31*d8b80295SApple OSS Distributions 32*d8b80295SApple OSS Distributions /* 33*d8b80295SApple OSS Distributions * File: sys/memory_maintenance.h 34*d8b80295SApple OSS Distributions * Author: Samuel Gosselin [[email protected]] 35*d8b80295SApple OSS Distributions * 36*d8b80295SApple OSS Distributions * Header file for Memory Maintenance support. 37*d8b80295SApple OSS Distributions */ 38*d8b80295SApple OSS Distributions 39*d8b80295SApple OSS Distributions /* 40*d8b80295SApple OSS Distributions * The kern.darkboot sysctl can be controlled from kexts or userspace. If 41*d8b80295SApple OSS Distributions * processes want to change the sysctl value, they require the 42*d8b80295SApple OSS Distributions * 'com.apple.private.kernel.darkboot' entitlement. 43*d8b80295SApple OSS Distributions * 44*d8b80295SApple OSS Distributions * Operating the kern.darkboot sysctl is done via using the commands below: 45*d8b80295SApple OSS Distributions * 46*d8b80295SApple OSS Distributions * - MEMORY_MAINTENANCE_DARK_BOOT_UNSET 47*d8b80295SApple OSS Distributions * Unset the kern.darkboot sysctl (kern.sysctl=0). 48*d8b80295SApple OSS Distributions * - MEMORY_MAINTENANCE_DARK_BOOT_SET 49*d8b80295SApple OSS Distributions * Set the kern.darkboot sysctl (kern.sysctl=1). 50*d8b80295SApple OSS Distributions * - MEMORY_MAINTENANCE_DARK_BOOT_SET_PERSISTENT 51*d8b80295SApple OSS Distributions * Set the kern.darkboot sysctl (kern.sysctl=1) and save its 52*d8b80295SApple OSS Distributions * value into the 'darkboot' NVRAM variable. 53*d8b80295SApple OSS Distributions * 54*d8b80295SApple OSS Distributions * Example: 55*d8b80295SApple OSS Distributions * sysctl kern.darkboot=2 56*d8b80295SApple OSS Distributions */ 57*d8b80295SApple OSS Distributions #define MEMORY_MAINTENANCE_DARK_BOOT_UNSET (0) 58*d8b80295SApple OSS Distributions #define MEMORY_MAINTENANCE_DARK_BOOT_SET (1) 59*d8b80295SApple OSS Distributions #define MEMORY_MAINTENANCE_DARK_BOOT_SET_PERSISTENT (2) 60*d8b80295SApple OSS Distributions 61*d8b80295SApple OSS Distributions #define MEMORY_MAINTENANCE_DARK_BOOT_NVRAM_NAME "darkboot" 62*d8b80295SApple OSS Distributions 63*d8b80295SApple OSS Distributions #endif /* _SYS_MEMORY_MAINTENANCE_H_ */ 64