include/asm-powerpc/lmb.h

   1 #ifndef _PPC64_LMB_H
   2 #define _PPC64_LMB_H
   3
   4 /*
   5  * Definitions for talking to the Open Firmware PROM on
   6  * Power Macintosh computers.
   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 <asm/prom.h>
  18
  19 #define MAX_LMB_REGIONS 128
  20
  21 #define LMB_ALLOC_ANYWHERE      0
  22
  23 struct lmb_property {
  24         unsigned long base;
  25         unsigned long size;
  26 };
  27
  28 struct lmb_region {
  29         unsigned long cnt;
  30         unsigned long size;
  31         struct lmb_property region[MAX_LMB_REGIONS+1];
  32 };
  33
  34 struct lmb {
  35         unsigned long debug;
  36         unsigned long rmo_size;
  37         struct lmb_region memory;
  38         struct lmb_region reserved;
  39 };
  40
  41 extern struct lmb lmb;
  42
  43 extern void __init lmb_init(void);
  44 extern void __init lmb_analyze(void);
  45 extern long __init lmb_add(unsigned long, unsigned long);
  46 extern long __init lmb_reserve(unsigned long, unsigned long);
  47 extern unsigned long __init lmb_alloc(unsigned long, unsigned long);
  48 extern unsigned long __init lmb_alloc_base(unsigned long, unsigned long,
  49                                            unsigned long);
  50 extern unsigned long __init lmb_phys_mem_size(void);
  51 extern unsigned long __init lmb_end_of_DRAM(void);
  52 extern unsigned long __init lmb_abs_to_phys(unsigned long);
  53 extern void __init lmb_enforce_memory_limit(unsigned long);
  54
  55 extern void lmb_dump_all(void);
  56
  57 extern unsigned long io_hole_start;
  58
  59 static inline unsigned long
  60 lmb_size_bytes(struct lmb_region *type, unsigned long region_nr)
  61 {
  62         return type->region[region_nr].size;
  63 }
  64 static inline unsigned long
  65 lmb_size_pages(struct lmb_region *type, unsigned long region_nr)
  66 {
  67         return lmb_size_bytes(type, region_nr) >> PAGE_SHIFT;
  68 }
  69 static inline unsigned long
  70 lmb_start_pfn(struct lmb_region *type, unsigned long region_nr)
  71 {
  72         return type->region[region_nr].base >> PAGE_SHIFT;
  73 }
  74 static inline unsigned long
  75 lmb_end_pfn(struct lmb_region *type, unsigned long region_nr)
  76 {
  77         return lmb_start_pfn(type, region_nr) +
  78                lmb_size_pages(type, region_nr);
  79 }
  80
  81 #endif /* _PPC64_LMB_H */