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64 lines
2.5 KiB
C
64 lines
2.5 KiB
C
/*
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* Copyright (c) 2015 Apple Inc. All rights reserved.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
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*
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* This file contains Original Code and/or Modifications of Original Code
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* as defined in and that are subject to the Apple Public Source License
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* Version 2.0 (the 'License'). You may not use this file except in
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* compliance with the License. The rights granted to you under the License
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* may not be used to create, or enable the creation or redistribution of,
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* unlawful or unlicensed copies of an Apple operating system, or to
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* circumvent, violate, or enable the circumvention or violation of, any
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* terms of an Apple operating system software license agreement.
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*
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* Please obtain a copy of the License at
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* http://www.opensource.apple.com/apsl/ and read it before using this file.
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*
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* The Original Code and all software distributed under the License are
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* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
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* Please see the License for the specific language governing rights and
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* limitations under the License.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
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*/
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#ifndef _SYS_MEMORY_MAINTENANCE_H_
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#define _SYS_MEMORY_MAINTENANCE_H_
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/*
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* File: sys/memory_maintenance.h
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* Author: Samuel Gosselin [sgosselin@apple.com]
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*
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* Header file for Memory Maintenance support.
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*/
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/*
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* The kern.darkboot sysctl can be controlled from kexts or userspace. If
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* processes want to change the sysctl value, they require the
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* 'com.apple.private.kernel.darkboot' entitlement.
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*
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* Operating the kern.darkboot sysctl is done via using the commands below:
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*
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* - MEMORY_MAINTENANCE_DARK_BOOT_UNSET
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* Unset the kern.darkboot sysctl (kern.sysctl=0).
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* - MEMORY_MAINTENANCE_DARK_BOOT_SET
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* Set the kern.darkboot sysctl (kern.sysctl=1).
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* - MEMORY_MAINTENANCE_DARK_BOOT_SET_PERSISTENT
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* Set the kern.darkboot sysctl (kern.sysctl=1) and save its
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* value into the 'darkboot' NVRAM variable.
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*
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* Example:
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* sysctl kern.darkboot=2
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*/
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#define MEMORY_MAINTENANCE_DARK_BOOT_UNSET (0)
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#define MEMORY_MAINTENANCE_DARK_BOOT_SET (1)
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#define MEMORY_MAINTENANCE_DARK_BOOT_SET_PERSISTENT (2)
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#define MEMORY_MAINTENANCE_DARK_BOOT_NVRAM_NAME "darkboot"
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#endif /* _SYS_MEMORY_MAINTENANCE_H_ */
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