include/linux/memblock.h

   1 #ifndef _LINUX_MEMBLOCK_H
   2 #define _LINUX_MEMBLOCK_H
   3 #ifdef __KERNEL__
   4
   5 /*
   6  * Logical memory blocks.
   7  *
   8  * Copyright (C) 2001 Peter Bergner, IBM Corp.
   9  *
  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.
  14  */
  15
  16 #include <linux/init.h>
  17 #include <linux/mm.h>
  18
  19 #include <asm/memblock.h>
  20
  21 #define MAX_MEMBLOCK_REGIONS 128
  22
  23 struct memblock_region {
  24         u64 base;
  25         u64 size;
  26 };
  27
  28 struct memblock_type {
  29         unsigned long cnt;
  30         u64 size;
  31         struct memblock_region regions[MAX_MEMBLOCK_REGIONS+1];
  32 };
  33
  34 struct memblock {
  35         unsigned long debug;
  36         u64 rmo_size;
  37         struct memblock_type memory;
  38         struct memblock_type reserved;
  39 };
  40
  41 extern struct memblock memblock;
  42
  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                                 u64 (*nid_range)(u64, u64, int *));
  51 extern u64 __init memblock_alloc(u64 size, u64 align);
  52 extern u64 __init memblock_alloc_base(u64 size,
  53                 u64, u64 max_addr);
  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);
  63 extern int memblock_find(struct memblock_region *res);
  64
  65 extern void memblock_dump_all(void);
  66
  67 static inline u64
  68 memblock_size_bytes(struct memblock_type *type, unsigned long region_nr)
  69 {
  70         return type->regions[region_nr].size;
  71 }
  72 static inline u64
  73 memblock_size_pages(struct memblock_type *type, unsigned long region_nr)
  74 {
  75         return memblock_size_bytes(type, region_nr) >> PAGE_SHIFT;
  76 }
  77 static inline u64
  78 memblock_start_pfn(struct memblock_type *type, unsigned long region_nr)
  79 {
  80         return type->regions[region_nr].base >> PAGE_SHIFT;
  81 }
  82 static inline u64
  83 memblock_end_pfn(struct memblock_type *type, unsigned long region_nr)
  84 {
  85         return memblock_start_pfn(type, region_nr) +
  86                memblock_size_pages(type, region_nr);
  87 }
  88
  89 #endif /* __KERNEL__ */
  90
  91 #endif /* _LINUX_MEMBLOCK_H */