#include <asm/errno.h>
#if defined(CONFIG_PM_SLEEP) && defined(CONFIG_VT) && defined(CONFIG_VT_CONSOLE)
+extern void pm_set_vt_switch(int);
extern int pm_prepare_console(void);
extern void pm_restore_console(void);
#else
-static inline int pm_prepare_console(void) { return 0; }
-static inline void pm_restore_console(void) {}
+static inline void pm_set_vt_switch(int do_switch)
+{
+}
+
+static inline int pm_prepare_console(void)
+{
+ return 0;
+}
+
+static inline void pm_restore_console(void)
+{
+}
#endif
typedef int __bitwise suspend_state_t;
* There is the %suspend_valid_only_mem function available that can be
* assigned to this if the platform only supports mem sleep.
*
- * @set_target: Tell the platform which system sleep state is going to be
- * entered.
- * @set_target() is executed right prior to suspending devices. The
- * information conveyed to the platform code by @set_target() should be
- * disregarded by the platform as soon as @finish() is executed and if
- * @prepare() fails. If @set_target() fails (ie. returns nonzero),
+ * @begin: Initialise a transition to given system sleep state.
+ * @begin() is executed right prior to suspending devices. The information
+ * conveyed to the platform code by @begin() should be disregarded by it as
+ * soon as @end() is executed. If @begin() fails (ie. returns nonzero),
* @prepare(), @enter() and @finish() will not be called by the PM core.
* This callback is optional. However, if it is implemented, the argument
- * passed to @prepare(), @enter() and @finish() is meaningless and should
- * be ignored.
+ * passed to @enter() is redundant and should be ignored.
*
* @prepare: Prepare the platform for entering the system sleep state indicated
- * by @set_target() or represented by the argument if @set_target() is not
- * implemented.
+ * by @begin().
* @prepare() is called right after devices have been suspended (ie. the
* appropriate .suspend() method has been executed for each device) and
* before the nonboot CPUs are disabled (it is executed with IRQs enabled).
* error code otherwise, in which case the system cannot enter the desired
* sleep state (@enter() and @finish() will not be called in that case).
*
- * @enter: Enter the system sleep state indicated by @set_target() or
- * represented by the argument if @set_target() is not implemented.
+ * @enter: Enter the system sleep state indicated by @begin() or represented by
+ * the argument if @begin() is not implemented.
* This callback is mandatory. It returns 0 on success or a negative
* error code otherwise, in which case the system cannot enter the desired
* sleep state.
*
* @finish: Called when the system has just left a sleep state, right after
* the nonboot CPUs have been enabled and before devices are resumed (it is
- * executed with IRQs enabled). If @set_target() is not implemented, the
- * argument represents the sleep state being left.
+ * executed with IRQs enabled).
* This callback is optional, but should be implemented by the platforms
* that implement @prepare(). If implemented, it is always called after
* @enter() (even if @enter() fails).
+ *
+ * @end: Called by the PM core right after resuming devices, to indicate to
+ * the platform that the system has returned to the working state or
+ * the transition to the sleep state has been aborted.
+ * This callback is optional, but should be implemented by the platforms
+ * that implement @begin(), but platforms implementing @begin() should
+ * also provide a @end() which cleans up transitions aborted before
+ * @enter().
*/
struct platform_suspend_ops {
int (*valid)(suspend_state_t state);
- int (*set_target)(suspend_state_t state);
- int (*prepare)(suspend_state_t state);
+ int (*begin)(suspend_state_t state);
+ int (*prepare)(void);
int (*enter)(suspend_state_t state);
- int (*finish)(suspend_state_t state);
+ void (*finish)(void);
+ void (*end)(void);
};
#ifdef CONFIG_SUSPEND
-extern struct platform_suspend_ops *suspend_ops;
-
/**
* suspend_set_ops - set platform dependent suspend operations
* @ops: The new suspend operations to set.
};
/* mm/page_alloc.c */
-extern void drain_local_pages(void);
extern void mark_free_pages(struct zone *zone);
/**
- * struct hibernation_ops - hibernation platform support
+ * struct platform_hibernation_ops - hibernation platform support
+ *
+ * The methods in this structure allow a platform to carry out special
+ * operations required by it during a hibernation transition.
+ *
+ * All the methods below must be implemented.
*
- * The methods in this structure allow a platform to override the default
- * mechanism of shutting down the machine during a hibernation transition.
+ * @begin: Tell the platform driver that we're starting hibernation.
+ * Called right after shrinking memory and before freezing devices.
*
- * All three methods must be assigned.
+ * @end: Called by the PM core right after resuming devices, to indicate to
+ * the platform that the system has returned to the working state.
*
- * @prepare: prepare system for hibernation
- * @enter: shut down system after state has been saved to disk
- * @finish: finish/clean up after state has been reloaded
- * @pre_restore: prepare system for the restoration from a hibernation image
- * @restore_cleanup: clean up after a failing image restoration
+ * @pre_snapshot: Prepare the platform for creating the hibernation image.
+ * Called right after devices have been frozen and before the nonboot
+ * CPUs are disabled (runs with IRQs on).
+ *
+ * @finish: Restore the previous state of the platform after the hibernation
+ * image has been created *or* put the platform into the normal operation
+ * mode after the hibernation (the same method is executed in both cases).
+ * Called right after the nonboot CPUs have been enabled and before
+ * thawing devices (runs with IRQs on).
+ *
+ * @prepare: Prepare the platform for entering the low power state.
+ * Called right after the hibernation image has been saved and before
+ * devices are prepared for entering the low power state.
+ *
+ * @enter: Put the system into the low power state after the hibernation image
+ * has been saved to disk.
+ * Called after the nonboot CPUs have been disabled and all of the low
+ * level devices have been shut down (runs with IRQs off).
+ *
+ * @leave: Perform the first stage of the cleanup after the system sleep state
+ * indicated by @set_target() has been left.
+ * Called right after the control has been passed from the boot kernel to
+ * the image kernel, before the nonboot CPUs are enabled and before devices
+ * are resumed. Executed with interrupts disabled.
+ *
+ * @pre_restore: Prepare system for the restoration from a hibernation image.
+ * Called right after devices have been frozen and before the nonboot
+ * CPUs are disabled (runs with IRQs on).
+ *
+ * @restore_cleanup: Clean up after a failing image restoration.
+ * Called right after the nonboot CPUs have been enabled and before
+ * thawing devices (runs with IRQs on).
*/
-struct hibernation_ops {
+struct platform_hibernation_ops {
+ int (*begin)(void);
+ void (*end)(void);
+ int (*pre_snapshot)(void);
+ void (*finish)(void);
int (*prepare)(void);
int (*enter)(void);
- void (*finish)(void);
+ void (*leave)(void);
int (*pre_restore)(void);
void (*restore_cleanup)(void);
};
extern void swsusp_unset_page_free(struct page *);
extern unsigned long get_safe_page(gfp_t gfp_mask);
-extern void hibernation_set_ops(struct hibernation_ops *ops);
+extern void hibernation_set_ops(struct platform_hibernation_ops *ops);
extern int hibernate(void);
#else /* CONFIG_HIBERNATION */
static inline int swsusp_page_is_forbidden(struct page *p) { return 0; }
static inline void swsusp_set_page_free(struct page *p) {}
static inline void swsusp_unset_page_free(struct page *p) {}
-static inline void hibernation_set_ops(struct hibernation_ops *ops) {}
+static inline void hibernation_set_ops(struct platform_hibernation_ops *ops) {}
static inline int hibernate(void) { return -ENOSYS; }
#endif /* CONFIG_HIBERNATION */
#ifdef CONFIG_PM_SLEEP
void save_processor_state(void);
void restore_processor_state(void);
-struct saved_context;
-void __save_processor_state(struct saved_context *ctxt);
-void __restore_processor_state(struct saved_context *ctxt);
/* kernel/power/main.c */
-extern struct blocking_notifier_head pm_chain_head;
-
-static inline int register_pm_notifier(struct notifier_block *nb)
-{
- return blocking_notifier_chain_register(&pm_chain_head, nb);
-}
-
-static inline int unregister_pm_notifier(struct notifier_block *nb)
-{
- return blocking_notifier_chain_unregister(&pm_chain_head, nb);
-}
+extern int register_pm_notifier(struct notifier_block *nb);
+extern int unregister_pm_notifier(struct notifier_block *nb);
#define pm_notifier(fn, pri) { \
static struct notifier_block fn##_nb = \