include/asm-powerpc/lmb.h

   1 #ifndef _PPC64_LMB_H
   2 #define _PPC64_LMB_H
   3 #ifdef __KERNEL__
   4
   5 /*
   6  * Definitions for talking to the Open Firmware PROM on
   7  * Power Macintosh computers.
   8  *
   9  * Copyright (C) 2001 Peter Bergner, IBM Corp.
  10  *
  11  * This program is free software; you can redistribute it and/or
  12  * modify it under the terms of the GNU General Public License
  13  * as published by the Free Software Foundation; either version
  14  * 2 of the License, or (at your option) any later version.
  15  */
  16
  17 #include <linux/init.h>
  18 #include <asm/prom.h>
  19
  20 #define MAX_LMB_REGIONS 128
  21
  22 #define LMB_ALLOC_ANYWHERE      0
  23
  24 struct lmb_property {
  25         unsigned long base;
  26         unsigned long size;
  27 };
  28
  29 struct lmb_region {
  30         unsigned long cnt;
  31         unsigned long size;
  32         struct lmb_property region[MAX_LMB_REGIONS+1];
  33 };
  34
  35 struct lmb {
  36         unsigned long debug;
  37         unsigned long rmo_size;
  38         struct lmb_region memory;
  39         struct lmb_region reserved;
  40 };
  41
  42 extern struct lmb lmb;
  43
  44 extern void __init lmb_init(void);
  45 extern void __init lmb_analyze(void);
  46 extern long __init lmb_add(unsigned long, unsigned long);
  47 extern long __init lmb_reserve(unsigned long, unsigned long);
  48 extern unsigned long __init lmb_alloc(unsigned long, unsigned long);
  49 extern unsigned long __init lmb_alloc_base(unsigned long, unsigned long,
  50                                            unsigned long);
  51 extern unsigned long __init lmb_phys_mem_size(void);
  52 extern unsigned long __init lmb_end_of_DRAM(void);
  53 extern unsigned long __init lmb_abs_to_phys(unsigned long);
  54 extern void __init lmb_enforce_memory_limit(unsigned long);
  55
  56 extern void lmb_dump_all(void);
  57
  58 extern unsigned long io_hole_start;
  59
  60 static inline unsigned long
  61 lmb_size_bytes(struct lmb_region *type, unsigned long region_nr)
  62 {
  63         return type->region[region_nr].size;
  64 }
  65 static inline unsigned long
  66 lmb_size_pages(struct lmb_region *type, unsigned long region_nr)
  67 {
  68         return lmb_size_bytes(type, region_nr) >> PAGE_SHIFT;
  69 }
  70 static inline unsigned long
  71 lmb_start_pfn(struct lmb_region *type, unsigned long region_nr)
  72 {
  73         return type->region[region_nr].base >> PAGE_SHIFT;
  74 }
  75 static inline unsigned long
  76 lmb_end_pfn(struct lmb_region *type, unsigned long region_nr)
  77 {
  78         return lmb_start_pfn(type, region_nr) +
  79                lmb_size_pages(type, region_nr);
  80 }
  81
  82 #endif /* __KERNEL__ */
  83 #endif /* _PPC64_LMB_H */