include/asm-powerpc/lmb.h

   1 #ifndef _ASM_POWERPC_LMB_H
   2 #define _ASM_POWERPC_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 struct lmb_property {
  23         unsigned long base;
  24         unsigned long size;
  25 };
  26
  27 struct lmb_region {
  28         unsigned long cnt;
  29         unsigned long size;
  30         struct lmb_property region[MAX_LMB_REGIONS+1];
  31 };
  32
  33 struct lmb {
  34         unsigned long debug;
  35         unsigned long rmo_size;
  36         struct lmb_region memory;
  37         struct lmb_region reserved;
  38 };
  39
  40 extern struct lmb lmb;
  41
  42 extern void __init lmb_init(void);
  43 extern void __init lmb_analyze(void);
  44 extern long __init lmb_add(unsigned long base, unsigned long size);
  45 extern long __init lmb_reserve(unsigned long base, unsigned long size);
  46 extern unsigned long __init lmb_alloc(unsigned long size, unsigned long align);
  47 extern unsigned long __init lmb_alloc_base(unsigned long size,
  48                 unsigned long align, unsigned long max_addr);
  49 extern unsigned long __init __lmb_alloc_base(unsigned long size,
  50                 unsigned long align, unsigned long max_addr);
  51 extern unsigned long __init lmb_phys_mem_size(void);
  52 extern unsigned long __init lmb_end_of_DRAM(void);
  53 extern void __init lmb_enforce_memory_limit(unsigned long memory_limit);
  54
  55 extern void lmb_dump_all(void);
  56
  57 static inline unsigned long
  58 lmb_size_bytes(struct lmb_region *type, unsigned long region_nr)
  59 {
  60         return type->region[region_nr].size;
  61 }
  62 static inline unsigned long
  63 lmb_size_pages(struct lmb_region *type, unsigned long region_nr)
  64 {
  65         return lmb_size_bytes(type, region_nr) >> PAGE_SHIFT;
  66 }
  67 static inline unsigned long
  68 lmb_start_pfn(struct lmb_region *type, unsigned long region_nr)
  69 {
  70         return type->region[region_nr].base >> PAGE_SHIFT;
  71 }
  72 static inline unsigned long
  73 lmb_end_pfn(struct lmb_region *type, unsigned long region_nr)
  74 {
  75         return lmb_start_pfn(type, region_nr) +
  76                lmb_size_pages(type, region_nr);
  77 }
  78
  79 #endif /* __KERNEL__ */
  80 #endif /* _ASM_POWERPC_LMB_H */