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16#ifndef _LINUX_MEMORY_H_
17#define _LINUX_MEMORY_H_
18
19#include <linux/node.h>
20#include <linux/compiler.h>
21#include <linux/mutex.h>
22#include <linux/notifier.h>
23
24#define MIN_MEMORY_BLOCK_SIZE (1UL << SECTION_SIZE_BITS)
25
26struct memory_block {
27 unsigned long start_section_nr;
28 unsigned long end_section_nr;
29 unsigned long state;
30 int section_count;
31 int online_type;
32 int phys_device;
33 void *hw;
34 int (*phys_callback)(struct memory_block *);
35 struct device dev;
36 int nid;
37};
38
39int arch_get_memory_phys_device(unsigned long start_pfn);
40unsigned long memory_block_size_bytes(void);
41int set_memory_block_size_order(unsigned int order);
42
43
44#define MEM_ONLINE (1<<0)
45#define MEM_GOING_OFFLINE (1<<1)
46#define MEM_OFFLINE (1<<2)
47#define MEM_GOING_ONLINE (1<<3)
48#define MEM_CANCEL_ONLINE (1<<4)
49#define MEM_CANCEL_OFFLINE (1<<5)
50
51struct memory_notify {
52 unsigned long start_pfn;
53 unsigned long nr_pages;
54 int status_change_nid_normal;
55 int status_change_nid_high;
56 int status_change_nid;
57};
58
59
60
61
62
63
64#define MEM_ISOLATE_COUNT (1<<0)
65
66struct memory_isolate_notify {
67 unsigned long start_pfn;
68 unsigned int nr_pages;
69 unsigned int pages_found;
70};
71
72struct notifier_block;
73struct mem_section;
74
75
76
77
78
79#define SLAB_CALLBACK_PRI 1
80#define IPC_CALLBACK_PRI 10
81
82#ifndef CONFIG_MEMORY_HOTPLUG_SPARSE
83static inline int memory_dev_init(void)
84{
85 return 0;
86}
87static inline int register_memory_notifier(struct notifier_block *nb)
88{
89 return 0;
90}
91static inline void unregister_memory_notifier(struct notifier_block *nb)
92{
93}
94static inline int memory_notify(unsigned long val, void *v)
95{
96 return 0;
97}
98static inline int register_memory_isolate_notifier(struct notifier_block *nb)
99{
100 return 0;
101}
102static inline void unregister_memory_isolate_notifier(struct notifier_block *nb)
103{
104}
105static inline int memory_isolate_notify(unsigned long val, void *v)
106{
107 return 0;
108}
109#else
110extern int register_memory_notifier(struct notifier_block *nb);
111extern void unregister_memory_notifier(struct notifier_block *nb);
112extern int register_memory_isolate_notifier(struct notifier_block *nb);
113extern void unregister_memory_isolate_notifier(struct notifier_block *nb);
114int create_memory_block_devices(unsigned long start, unsigned long size);
115void remove_memory_block_devices(unsigned long start, unsigned long size);
116extern int memory_dev_init(void);
117extern int memory_notify(unsigned long val, void *v);
118extern int memory_isolate_notify(unsigned long val, void *v);
119extern struct memory_block *find_memory_block(struct mem_section *);
120typedef int (*walk_memory_blocks_func_t)(struct memory_block *, void *);
121extern int walk_memory_blocks(unsigned long start, unsigned long size,
122 void *arg, walk_memory_blocks_func_t func);
123#define CONFIG_MEM_BLOCK_SIZE (PAGES_PER_SECTION<<PAGE_SHIFT)
124#endif
125
126#ifdef CONFIG_MEMORY_HOTPLUG
127#define hotplug_memory_notifier(fn, pri) ({ \
128 static __meminitdata struct notifier_block fn##_mem_nb =\
129 { .notifier_call = fn, .priority = pri };\
130 register_memory_notifier(&fn##_mem_nb); \
131})
132#define register_hotmemory_notifier(nb) register_memory_notifier(nb)
133#define unregister_hotmemory_notifier(nb) unregister_memory_notifier(nb)
134#else
135#define hotplug_memory_notifier(fn, pri) ({ 0; })
136
137#define register_hotmemory_notifier(nb) ({ (void)(nb); 0; })
138#define unregister_hotmemory_notifier(nb) ({ (void)(nb); })
139#endif
140
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144
145extern struct mutex text_mutex;
146
147#endif
148