| /* |
| * include/linux/memory.h - generic memory definition |
| * |
| * This is mainly for topological representation. We define the |
| * basic "struct memory_block" here, which can be embedded in per-arch |
| * definitions or NUMA information. |
| * |
| * Basic handling of the devices is done in drivers/base/memory.c |
| * and system devices are handled in drivers/base/sys.c. |
| * |
| * Memory block are exported via sysfs in the class/memory/devices/ |
| * directory. |
| * |
| */ |
| #ifndef _LINUX_MEMORY_H_ |
| #define _LINUX_MEMORY_H_ |
| |
| #include <linux/sysdev.h> |
| #include <linux/node.h> |
| #include <linux/compiler.h> |
| #include <linux/semaphore.h> |
| |
| struct memory_block { |
| unsigned long phys_index; |
| unsigned long state; |
| /* |
| * This serializes all state change requests. It isn't |
| * held during creation because the control files are |
| * created long after the critical areas during |
| * initialization. |
| */ |
| struct semaphore state_sem; |
| int phys_device; /* to which fru does this belong? */ |
| void *hw; /* optional pointer to fw/hw data */ |
| int (*phys_callback)(struct memory_block *); |
| struct sys_device sysdev; |
| }; |
| |
| /* These states are exposed to userspace as text strings in sysfs */ |
| #define MEM_ONLINE (1<<0) /* exposed to userspace */ |
| #define MEM_GOING_OFFLINE (1<<1) /* exposed to userspace */ |
| #define MEM_OFFLINE (1<<2) /* exposed to userspace */ |
| #define MEM_GOING_ONLINE (1<<3) |
| #define MEM_CANCEL_ONLINE (1<<4) |
| #define MEM_CANCEL_OFFLINE (1<<5) |
| |
| struct memory_notify { |
| unsigned long start_pfn; |
| unsigned long nr_pages; |
| int status_change_nid; |
| }; |
| |
| struct notifier_block; |
| struct mem_section; |
| |
| #ifndef CONFIG_MEMORY_HOTPLUG_SPARSE |
| static inline int memory_dev_init(void) |
| { |
| return 0; |
| } |
| static inline int register_memory_notifier(struct notifier_block *nb) |
| { |
| return 0; |
| } |
| static inline void unregister_memory_notifier(struct notifier_block *nb) |
| { |
| } |
| static inline int memory_notify(unsigned long val, void *v) |
| { |
| return 0; |
| } |
| #else |
| extern int register_memory_notifier(struct notifier_block *nb); |
| extern void unregister_memory_notifier(struct notifier_block *nb); |
| extern int register_new_memory(struct mem_section *); |
| extern int unregister_memory_section(struct mem_section *); |
| extern int memory_dev_init(void); |
| extern int remove_memory_block(unsigned long, struct mem_section *, int); |
| extern int memory_notify(unsigned long val, void *v); |
| #define CONFIG_MEM_BLOCK_SIZE (PAGES_PER_SECTION<<PAGE_SHIFT) |
| |
| |
| #endif /* CONFIG_MEMORY_HOTPLUG_SPARSE */ |
| |
| #ifdef CONFIG_MEMORY_HOTPLUG |
| #define hotplug_memory_notifier(fn, pri) { \ |
| static struct notifier_block fn##_mem_nb = \ |
| { .notifier_call = fn, .priority = pri }; \ |
| register_memory_notifier(&fn##_mem_nb); \ |
| } |
| #else |
| #define hotplug_memory_notifier(fn, pri) do { } while (0) |
| #endif |
| |
| #endif /* _LINUX_MEMORY_H_ */ |