author | Florian Westphal <fw@strlen.de> |
Thu, 09 Apr 2009 12:07:21 +0200 | |
changeset 2 | d1f6d8b6f81c |
parent 0 | aa628870c1d3 |
permissions | -rw-r--r-- |
0
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#ifndef _LINUX_SUSPEND_H |
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#define _LINUX_SUSPEND_H |
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|
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#if defined(CONFIG_X86) || defined(CONFIG_FRV) || defined(CONFIG_PPC32) || defined(CONFIG_PPC64) |
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#include <asm/suspend.h> |
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#endif |
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#include <linux/swap.h> |
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#include <linux/notifier.h> |
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#include <linux/init.h> |
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#include <linux/pm.h> |
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#include <linux/mm.h> |
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#include <asm/errno.h> |
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|
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#if defined(CONFIG_PM_SLEEP) && defined(CONFIG_VT) && defined(CONFIG_VT_CONSOLE) |
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extern void pm_set_vt_switch(int); |
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extern int pm_prepare_console(void); |
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extern void pm_restore_console(void); |
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#else |
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static inline void pm_set_vt_switch(int do_switch) |
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{ |
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} |
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|
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static inline int pm_prepare_console(void) |
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{ |
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return 0; |
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} |
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|
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static inline void pm_restore_console(void) |
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{ |
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} |
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#endif |
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typedef int __bitwise suspend_state_t; |
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|
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#define PM_SUSPEND_ON ((__force suspend_state_t) 0) |
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#define PM_SUSPEND_STANDBY ((__force suspend_state_t) 1) |
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#define PM_SUSPEND_MEM ((__force suspend_state_t) 3) |
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#define PM_SUSPEND_MAX ((__force suspend_state_t) 4) |
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|
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/** |
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* struct platform_suspend_ops - Callbacks for managing platform dependent |
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* system sleep states. |
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* |
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* @valid: Callback to determine if given system sleep state is supported by |
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* the platform. |
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* Valid (ie. supported) states are advertised in /sys/power/state. Note |
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* that it still may be impossible to enter given system sleep state if the |
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* conditions aren't right. |
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* There is the %suspend_valid_only_mem function available that can be |
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* assigned to this if the platform only supports mem sleep. |
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* |
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* @begin: Initialise a transition to given system sleep state. |
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* @begin() is executed right prior to suspending devices. The information |
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* conveyed to the platform code by @begin() should be disregarded by it as |
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* soon as @end() is executed. If @begin() fails (ie. returns nonzero), |
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* @prepare(), @enter() and @finish() will not be called by the PM core. |
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* This callback is optional. However, if it is implemented, the argument |
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* passed to @enter() is redundant and should be ignored. |
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* |
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* @prepare: Prepare the platform for entering the system sleep state indicated |
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* by @begin(). |
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* @prepare() is called right after devices have been suspended (ie. the |
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* appropriate .suspend() method has been executed for each device) and |
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* before the nonboot CPUs are disabled (it is executed with IRQs enabled). |
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* This callback is optional. It returns 0 on success or a negative |
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* error code otherwise, in which case the system cannot enter the desired |
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* sleep state (@enter() and @finish() will not be called in that case). |
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* |
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* @enter: Enter the system sleep state indicated by @begin() or represented by |
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* the argument if @begin() is not implemented. |
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* This callback is mandatory. It returns 0 on success or a negative |
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* error code otherwise, in which case the system cannot enter the desired |
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* sleep state. |
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* |
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* @finish: Called when the system has just left a sleep state, right after |
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* the nonboot CPUs have been enabled and before devices are resumed (it is |
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* executed with IRQs enabled). |
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* This callback is optional, but should be implemented by the platforms |
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* that implement @prepare(). If implemented, it is always called after |
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* @enter() (even if @enter() fails). |
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* |
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* @end: Called by the PM core right after resuming devices, to indicate to |
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* the platform that the system has returned to the working state or |
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* the transition to the sleep state has been aborted. |
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* This callback is optional, but should be implemented by the platforms |
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* that implement @begin(), but platforms implementing @begin() should |
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* also provide a @end() which cleans up transitions aborted before |
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* @enter(). |
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* |
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* @recover: Recover the platform from a suspend failure. |
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* Called by the PM core if the suspending of devices fails. |
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* This callback is optional and should only be implemented by platforms |
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* which require special recovery actions in that situation. |
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*/ |
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struct platform_suspend_ops { |
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int (*valid)(suspend_state_t state); |
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int (*begin)(suspend_state_t state); |
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int (*prepare)(void); |
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int (*enter)(suspend_state_t state); |
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void (*finish)(void); |
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void (*end)(void); |
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void (*recover)(void); |
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}; |
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|
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#ifdef CONFIG_SUSPEND |
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/** |
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* suspend_set_ops - set platform dependent suspend operations |
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* @ops: The new suspend operations to set. |
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*/ |
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extern void suspend_set_ops(struct platform_suspend_ops *ops); |
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extern int suspend_valid_only_mem(suspend_state_t state); |
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|
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/** |
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* arch_suspend_disable_irqs - disable IRQs for suspend |
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* |
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* Disables IRQs (in the default case). This is a weak symbol in the common |
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* code and thus allows architectures to override it if more needs to be |
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* done. Not called for suspend to disk. |
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*/ |
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extern void arch_suspend_disable_irqs(void); |
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|
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/** |
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* arch_suspend_enable_irqs - enable IRQs after suspend |
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* |
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* Enables IRQs (in the default case). This is a weak symbol in the common |
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* code and thus allows architectures to override it if more needs to be |
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* done. Not called for suspend to disk. |
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*/ |
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extern void arch_suspend_enable_irqs(void); |
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|
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extern int pm_suspend(suspend_state_t state); |
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#else /* !CONFIG_SUSPEND */ |
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#define suspend_valid_only_mem NULL |
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|
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static inline void suspend_set_ops(struct platform_suspend_ops *ops) {} |
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static inline int pm_suspend(suspend_state_t state) { return -ENOSYS; } |
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#endif /* !CONFIG_SUSPEND */ |
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|
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/* struct pbe is used for creating lists of pages that should be restored |
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* atomically during the resume from disk, because the page frames they have |
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* occupied before the suspend are in use. |
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*/ |
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struct pbe { |
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void *address; /* address of the copy */ |
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void *orig_address; /* original address of a page */ |
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struct pbe *next; |
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}; |
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|
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/* mm/page_alloc.c */ |
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extern void mark_free_pages(struct zone *zone); |
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|
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/** |
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* struct platform_hibernation_ops - hibernation platform support |
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* |
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* The methods in this structure allow a platform to carry out special |
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* operations required by it during a hibernation transition. |
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* |
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* All the methods below, except for @recover(), must be implemented. |
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* |
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* @begin: Tell the platform driver that we're starting hibernation. |
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* Called right after shrinking memory and before freezing devices. |
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* |
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* @end: Called by the PM core right after resuming devices, to indicate to |
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* the platform that the system has returned to the working state. |
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* |
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* @pre_snapshot: Prepare the platform for creating the hibernation image. |
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* Called right after devices have been frozen and before the nonboot |
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* CPUs are disabled (runs with IRQs on). |
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* |
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* @finish: Restore the previous state of the platform after the hibernation |
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* image has been created *or* put the platform into the normal operation |
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* mode after the hibernation (the same method is executed in both cases). |
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* Called right after the nonboot CPUs have been enabled and before |
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* thawing devices (runs with IRQs on). |
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* |
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176 |
* @prepare: Prepare the platform for entering the low power state. |
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* Called right after the hibernation image has been saved and before |
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178 |
* devices are prepared for entering the low power state. |
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179 |
* |
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180 |
* @enter: Put the system into the low power state after the hibernation image |
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* has been saved to disk. |
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182 |
* Called after the nonboot CPUs have been disabled and all of the low |
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183 |
* level devices have been shut down (runs with IRQs off). |
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184 |
* |
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185 |
* @leave: Perform the first stage of the cleanup after the system sleep state |
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186 |
* indicated by @set_target() has been left. |
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187 |
* Called right after the control has been passed from the boot kernel to |
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188 |
* the image kernel, before the nonboot CPUs are enabled and before devices |
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189 |
* are resumed. Executed with interrupts disabled. |
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190 |
* |
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191 |
* @pre_restore: Prepare system for the restoration from a hibernation image. |
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192 |
* Called right after devices have been frozen and before the nonboot |
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193 |
* CPUs are disabled (runs with IRQs on). |
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194 |
* |
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195 |
* @restore_cleanup: Clean up after a failing image restoration. |
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196 |
* Called right after the nonboot CPUs have been enabled and before |
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197 |
* thawing devices (runs with IRQs on). |
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198 |
* |
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199 |
* @recover: Recover the platform from a failure to suspend devices. |
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200 |
* Called by the PM core if the suspending of devices during hibernation |
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201 |
* fails. This callback is optional and should only be implemented by |
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202 |
* platforms which require special recovery actions in that situation. |
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203 |
*/ |
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|
204 |
struct platform_hibernation_ops { |
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205 |
int (*begin)(void); |
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206 |
void (*end)(void); |
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Port of Linux 2.6.28 for use with network simulation cradle.
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207 |
int (*pre_snapshot)(void); |
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208 |
void (*finish)(void); |
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209 |
int (*prepare)(void); |
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Port of Linux 2.6.28 for use with network simulation cradle.
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210 |
int (*enter)(void); |
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Port of Linux 2.6.28 for use with network simulation cradle.
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211 |
void (*leave)(void); |
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212 |
int (*pre_restore)(void); |
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213 |
void (*restore_cleanup)(void); |
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214 |
void (*recover)(void); |
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215 |
}; |
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216 |
|
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217 |
#ifdef CONFIG_HIBERNATION |
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218 |
/* kernel/power/snapshot.c */ |
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219 |
extern void __register_nosave_region(unsigned long b, unsigned long e, int km); |
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220 |
static inline void __init register_nosave_region(unsigned long b, unsigned long e) |
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221 |
{ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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222 |
__register_nosave_region(b, e, 0); |
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Port of Linux 2.6.28 for use with network simulation cradle.
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223 |
} |
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Port of Linux 2.6.28 for use with network simulation cradle.
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static inline void __init register_nosave_region_late(unsigned long b, unsigned long e) |
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{ |
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__register_nosave_region(b, e, 1); |
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} |
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extern int swsusp_page_is_forbidden(struct page *); |
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extern void swsusp_set_page_free(struct page *); |
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extern void swsusp_unset_page_free(struct page *); |
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extern unsigned long get_safe_page(gfp_t gfp_mask); |
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extern void hibernation_set_ops(struct platform_hibernation_ops *ops); |
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extern int hibernate(void); |
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extern int hibernate_nvs_register(unsigned long start, unsigned long size); |
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extern int hibernate_nvs_alloc(void); |
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extern void hibernate_nvs_free(void); |
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extern void hibernate_nvs_save(void); |
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extern void hibernate_nvs_restore(void); |
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extern bool system_entering_hibernation(void); |
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#else /* CONFIG_HIBERNATION */ |
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static inline int swsusp_page_is_forbidden(struct page *p) { return 0; } |
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static inline void swsusp_set_page_free(struct page *p) {} |
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static inline void swsusp_unset_page_free(struct page *p) {} |
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static inline void hibernation_set_ops(struct platform_hibernation_ops *ops) {} |
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static inline int hibernate(void) { return -ENOSYS; } |
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static inline int hibernate_nvs_register(unsigned long a, unsigned long b) |
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{ |
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return 0; |
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} |
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static inline int hibernate_nvs_alloc(void) { return 0; } |
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static inline void hibernate_nvs_free(void) {} |
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static inline void hibernate_nvs_save(void) {} |
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static inline void hibernate_nvs_restore(void) {} |
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static inline bool system_entering_hibernation(void) { return false; } |
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#endif /* CONFIG_HIBERNATION */ |
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#ifdef CONFIG_PM_SLEEP |
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void save_processor_state(void); |
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void restore_processor_state(void); |
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/* kernel/power/main.c */ |
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extern int register_pm_notifier(struct notifier_block *nb); |
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extern int unregister_pm_notifier(struct notifier_block *nb); |
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#define pm_notifier(fn, pri) { \ |
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static struct notifier_block fn##_nb = \ |
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{ .notifier_call = fn, .priority = pri }; \ |
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register_pm_notifier(&fn##_nb); \ |
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} |
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#else /* !CONFIG_PM_SLEEP */ |
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static inline int register_pm_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 unregister_pm_notifier(struct notifier_block *nb) |
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{ |
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return 0; |
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} |
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|
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#define pm_notifier(fn, pri) do { (void)(fn); } while (0) |
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#endif /* !CONFIG_PM_SLEEP */ |
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|
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#ifndef CONFIG_HIBERNATION |
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static inline void register_nosave_region(unsigned long b, unsigned long e) |
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{ |
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} |
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static inline void register_nosave_region_late(unsigned long b, unsigned long e) |
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{ |
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} |
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#endif |
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extern struct mutex pm_mutex; |
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|
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#endif /* _LINUX_SUSPEND_H */ |