1
2
3
4
5
6
7
8
9
10
11
12
13
14
15#ifndef _LINUX_MEMORY_H_
16#define _LINUX_MEMORY_H_
17
18#include <linux/node.h>
19#include <linux/compiler.h>
20#include <linux/mutex.h>
21#include <linux/notifier.h>
22
23#define MIN_MEMORY_BLOCK_SIZE (1UL << SECTION_SIZE_BITS)
24
25struct memory_block {
26 unsigned long start_section_nr;
27 unsigned long end_section_nr;
28 unsigned long state;
29 int section_count;
30 int online_type;
31 int phys_device;
32 void *hw;
33 int (*phys_callback)(struct memory_block *);
34 struct device dev;
35};
36
37int arch_get_memory_phys_device(unsigned long start_pfn);
38unsigned long memory_block_size_bytes(void);
39
40
41#define MEM_ONLINE (1<<0)
42#define MEM_GOING_OFFLINE (1<<1)
43#define MEM_OFFLINE (1<<2)
44#define MEM_GOING_ONLINE (1<<3)
45#define MEM_CANCEL_ONLINE (1<<4)
46#define MEM_CANCEL_OFFLINE (1<<5)
47
48struct memory_notify {
49 unsigned long start_pfn;
50 unsigned long nr_pages;
51 int status_change_nid_normal;
52 int status_change_nid_high;
53 int status_change_nid;
54};
55
56
57
58
59
60
61#define MEM_ISOLATE_COUNT (1<<0)
62
63struct memory_isolate_notify {
64 unsigned long start_pfn;
65 unsigned int nr_pages;
66 unsigned int pages_found;
67};
68
69struct notifier_block;
70struct mem_section;
71
72
73
74
75
76#define SLAB_CALLBACK_PRI 1
77#define IPC_CALLBACK_PRI 10
78
79#ifndef CONFIG_MEMORY_HOTPLUG_SPARSE
80static inline int memory_dev_init(void)
81{
82 return 0;
83}
84static inline int register_memory_notifier(struct notifier_block *nb)
85{
86 return 0;
87}
88static inline void unregister_memory_notifier(struct notifier_block *nb)
89{
90}
91static inline int memory_notify(unsigned long val, void *v)
92{
93 return 0;
94}
95static inline int register_memory_isolate_notifier(struct notifier_block *nb)
96{
97 return 0;
98}
99static inline void unregister_memory_isolate_notifier(struct notifier_block *nb)
100{
101}
102static inline int memory_isolate_notify(unsigned long val, void *v)
103{
104 return 0;
105}
106#else
107extern int register_memory_notifier(struct notifier_block *nb);
108extern void unregister_memory_notifier(struct notifier_block *nb);
109extern int register_memory_isolate_notifier(struct notifier_block *nb);
110extern void unregister_memory_isolate_notifier(struct notifier_block *nb);
111extern int register_new_memory(int, struct mem_section *);
112extern int memory_block_change_state(struct memory_block *mem,
113 unsigned long to_state,
114 unsigned long from_state_req);
115#ifdef CONFIG_MEMORY_HOTREMOVE
116extern int unregister_memory_section(struct mem_section *);
117#endif
118extern int memory_dev_init(void);
119extern int memory_notify(unsigned long val, void *v);
120extern int memory_isolate_notify(unsigned long val, void *v);
121extern struct memory_block *find_memory_block_hinted(struct mem_section *,
122 struct memory_block *);
123extern struct memory_block *find_memory_block(struct mem_section *);
124#define CONFIG_MEM_BLOCK_SIZE (PAGES_PER_SECTION<<PAGE_SHIFT)
125#endif
126
127#ifdef CONFIG_MEMORY_HOTPLUG
128#define hotplug_memory_notifier(fn, pri) ({ \
129 static __meminitdata struct notifier_block fn##_mem_nb =\
130 { .notifier_call = fn, .priority = pri };\
131 register_memory_notifier(&fn##_mem_nb); \
132})
133#define register_hotmemory_notifier(nb) register_memory_notifier(nb)
134#define unregister_hotmemory_notifier(nb) unregister_memory_notifier(nb)
135#else
136#define hotplug_memory_notifier(fn, pri) ({ 0; })
137
138#define register_hotmemory_notifier(nb) ({ (void)(nb); 0; })
139#define unregister_hotmemory_notifier(nb) ({ (void)(nb); })
140#endif
141
142
143
144
145
146extern struct mutex text_mutex;
147
148#endif
149