1 #ifndef _LINUX_MEMBLOCK_H
2 #define _LINUX_MEMBLOCK_H
6 * Logical memory blocks.
8 * Copyright (C) 2001 Peter Bergner, IBM Corp.
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version
13 * 2 of the License, or (at your option) any later version.
16 #include <linux/init.h>
19 #include <asm/memblock.h>
21 #define MAX_MEMBLOCK_REGIONS 128
23 struct memblock_region
{
28 struct memblock_type
{
31 struct memblock_region regions
[MAX_MEMBLOCK_REGIONS
+1];
37 struct memblock_type memory
;
38 struct memblock_type reserved
;
41 extern struct memblock memblock
;
43 extern void __init
memblock_init(void);
44 extern void __init
memblock_analyze(void);
45 extern long memblock_add(u64 base
, u64 size
);
46 extern long memblock_remove(u64 base
, u64 size
);
47 extern long __init
memblock_free(u64 base
, u64 size
);
48 extern long __init
memblock_reserve(u64 base
, u64 size
);
49 extern u64 __init
memblock_alloc_nid(u64 size
, u64 align
, int nid
);
50 extern u64 __init
memblock_alloc(u64 size
, u64 align
);
51 extern u64 __init
memblock_alloc_base(u64 size
,
53 #define MEMBLOCK_ALLOC_ANYWHERE 0
54 extern u64 __init
__memblock_alloc_base(u64 size
,
55 u64 align
, u64 max_addr
);
56 extern u64 __init
memblock_phys_mem_size(void);
57 extern u64
memblock_end_of_DRAM(void);
58 extern void __init
memblock_enforce_memory_limit(u64 memory_limit
);
59 extern int memblock_is_memory(u64 addr
);
60 extern int memblock_is_region_memory(u64 base
, u64 size
);
61 extern int __init
memblock_is_reserved(u64 addr
);
62 extern int memblock_is_region_reserved(u64 base
, u64 size
);
64 extern void memblock_dump_all(void);
66 /* Provided by the architecture */
67 extern u64
memblock_nid_range(u64 start
, u64 end
, int *nid
);
71 * pfn conversion functions
73 * While the memory MEMBLOCKs should always be page aligned, the reserved
74 * MEMBLOCKs may not be. This accessor attempt to provide a very clear
75 * idea of what they return for such non aligned MEMBLOCKs.
79 * memblock_region_base_pfn - Return the lowest pfn intersecting with the region
80 * @reg: memblock_region structure
82 static inline unsigned long memblock_region_base_pfn(const struct memblock_region
*reg
)
84 return reg
->base
>> PAGE_SHIFT
;
88 * memblock_region_last_pfn - Return the highest pfn intersecting with the region
89 * @reg: memblock_region structure
91 static inline unsigned long memblock_region_last_pfn(const struct memblock_region
*reg
)
93 return (reg
->base
+ reg
->size
- 1) >> PAGE_SHIFT
;
97 * memblock_region_end_pfn - Return the pfn of the first page following the region
98 * but not intersecting it
99 * @reg: memblock_region structure
101 static inline unsigned long memblock_region_end_pfn(const struct memblock_region
*reg
)
103 return memblock_region_last_pfn(reg
) + 1;
107 * memblock_region_pages - Return the number of pages covering a region
108 * @reg: memblock_region structure
110 static inline unsigned long memblock_region_pages(const struct memblock_region
*reg
)
112 return memblock_region_end_pfn(reg
) - memblock_region_end_pfn(reg
);
115 #define for_each_memblock(memblock_type, region) \
116 for (region = memblock.memblock_type.regions; \
117 region < (memblock.memblock_type.regions + memblock.memblock_type.cnt); \
121 #endif /* __KERNEL__ */
123 #endif /* _LINUX_MEMBLOCK_H */