include/linux/lmb.h

   1 #ifndef _LINUX_LMB_H
   2 #define _LINUX_LMB_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 #define MAX_LMB_REGIONS 128
  20
  21 struct lmb_property {
  22         u64 base;
  23         u64 size;
  24 };
  25
  26 struct lmb_region {
  27         unsigned long cnt;
  28         u64 size;
  29         struct lmb_property region[MAX_LMB_REGIONS+1];
  30 };
  31
  32 struct lmb {
  33         unsigned long debug;
  34         u64 rmo_size;
  35         struct lmb_region memory;
  36         struct lmb_region reserved;
  37 };
  38
  39 extern struct lmb lmb;
  40
  41 extern void __init lmb_init(void);
  42 extern void __init lmb_analyze(void);
  43 extern long lmb_add(u64 base, u64 size);
  44 extern long lmb_remove(u64 base, u64 size);
  45 extern long __init lmb_free(u64 base, u64 size);
  46 extern long __init lmb_reserve(u64 base, u64 size);
  47 extern u64 __init lmb_alloc_nid(u64 size, u64 align, int nid,
  48                                 u64 (*nid_range)(u64, u64, int *));
  49 extern u64 __init lmb_alloc(u64 size, u64 align);
  50 extern u64 __init lmb_alloc_base(u64 size,
  51                 u64, u64 max_addr);
  52 extern u64 __init __lmb_alloc_base(u64 size,
  53                 u64 align, u64 max_addr);
  54 extern u64 __init lmb_phys_mem_size(void);
  55 extern u64 lmb_end_of_DRAM(void);
  56 extern void __init lmb_enforce_memory_limit(u64 memory_limit);
  57 extern int __init lmb_is_reserved(u64 addr);
  58 extern int lmb_is_region_reserved(u64 base, u64 size);
  59 extern int lmb_find(struct lmb_property *res);
  60
  61 extern void lmb_dump_all(void);
  62
  63 static inline u64
  64 lmb_size_bytes(struct lmb_region *type, unsigned long region_nr)
  65 {
  66         return type->region[region_nr].size;
  67 }
  68 static inline u64
  69 lmb_size_pages(struct lmb_region *type, unsigned long region_nr)
  70 {
  71         return lmb_size_bytes(type, region_nr) >> PAGE_SHIFT;
  72 }
  73 static inline u64
  74 lmb_start_pfn(struct lmb_region *type, unsigned long region_nr)
  75 {
  76         return type->region[region_nr].base >> PAGE_SHIFT;
  77 }
  78 static inline u64
  79 lmb_end_pfn(struct lmb_region *type, unsigned long region_nr)
  80 {
  81         return lmb_start_pfn(type, region_nr) +
  82                lmb_size_pages(type, region_nr);
  83 }
  84
  85 #include <asm/lmb.h>
  86
  87 #endif /* __KERNEL__ */
  88
  89 #endif /* _LINUX_LMB_H */