forked from Qortal/Brooklyn
2a709f28fa
* 0day explit mitigation * Memory corruption prevention * Privilege escalation prevention * Buffer over flow prevention * File System corruption defense * Thread escape prevention This may very well be the most intensive inclusion to BrooklynR. This will not be part of an x86 suite nor it will be released as tool kit. The security core toolkit will remain part of kernel base.
110 lines
2.8 KiB
C
110 lines
2.8 KiB
C
/*
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* Copyright (C) 2011 Google, Inc.
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*
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* Author:
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* Colin Cross <ccross@android.com>
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#ifndef _LINUX_CPU_PM_H
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#define _LINUX_CPU_PM_H
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#include <linux/kernel.h>
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#include <linux/notifier.h>
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/*
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* When a CPU goes to a low power state that turns off power to the CPU's
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* power domain, the contents of some blocks (floating point coprocessors,
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* interrupt controllers, caches, timers) in the same power domain can
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* be lost. The cpm_pm notifiers provide a method for platform idle, suspend,
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* and hotplug implementations to notify the drivers for these blocks that
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* they may be reset.
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*
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* All cpu_pm notifications must be called with interrupts disabled.
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*
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* The notifications are split into two classes: CPU notifications and CPU
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* cluster notifications.
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*
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* CPU notifications apply to a single CPU and must be called on the affected
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* CPU. They are used to save per-cpu context for affected blocks.
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*
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* CPU cluster notifications apply to all CPUs in a single power domain. They
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* are used to save any global context for affected blocks, and must be called
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* after all the CPUs in the power domain have been notified of the low power
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* state.
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*/
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/*
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* Event codes passed as unsigned long val to notifier calls
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*/
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enum cpu_pm_event {
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/* A single cpu is entering a low power state */
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CPU_PM_ENTER,
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/* A single cpu failed to enter a low power state */
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CPU_PM_ENTER_FAILED,
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/* A single cpu is exiting a low power state */
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CPU_PM_EXIT,
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/* A cpu power domain is entering a low power state */
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CPU_CLUSTER_PM_ENTER,
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/* A cpu power domain failed to enter a low power state */
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CPU_CLUSTER_PM_ENTER_FAILED,
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/* A cpu power domain is exiting a low power state */
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CPU_CLUSTER_PM_EXIT,
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};
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#ifdef CONFIG_CPU_PM
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int cpu_pm_register_notifier(struct notifier_block *nb);
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int cpu_pm_unregister_notifier(struct notifier_block *nb);
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int cpu_pm_enter(void);
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int cpu_pm_exit(void);
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int cpu_cluster_pm_enter(void);
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int cpu_cluster_pm_exit(void);
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#else
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static inline int cpu_pm_register_notifier(struct notifier_block *nb)
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{
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return 0;
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}
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static inline int cpu_pm_unregister_notifier(struct notifier_block *nb)
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{
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return 0;
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}
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static inline int cpu_pm_enter(void)
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{
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return 0;
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}
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static inline int cpu_pm_exit(void)
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{
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return 0;
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}
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static inline int cpu_cluster_pm_enter(void)
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{
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return 0;
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}
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static inline int cpu_cluster_pm_exit(void)
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{
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return 0;
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}
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#endif
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#endif
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