LXR linux-old/include/asm-ppc64/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/config.h>
  17#include <asm/prom.h>
  18
  19extern unsigned long reloc_offset(void);
  20
  21#define MAX_LMB_REGIONS 64
  22
  23union lmb_reg_property { 
  24        struct reg_property32 addr32[MAX_LMB_REGIONS];
  25        struct reg_property64 addr64[MAX_LMB_REGIONS];
  26};
  27
  28#define LMB_MEMORY_AREA 1
  29#define LMB_IO_AREA     2
  30
  31#define LMB_ALLOC_ANYWHERE      0
  32#define LMB_ALLOC_FIRST4GBYTE   (1UL<<32)
  33
  34struct lmb_property {
  35        unsigned long base;
  36        unsigned long physbase;
  37        unsigned long size;
  38        unsigned long type;
  39};
  40
  41struct lmb_region {
  42        unsigned long cnt;
  43        unsigned long size;
  44        unsigned long iosize;
  45        unsigned long lcd_size;         /* Least Common Denominator */
  46        struct lmb_property region[MAX_LMB_REGIONS+1];
  47};
  48
  49struct lmb {
  50        unsigned long debug;
  51        unsigned long rmo_size;
  52        struct lmb_region memory;
  53        struct lmb_region reserved;
  54};
  55
  56extern struct lmb lmb;
  57
  58extern void lmb_init(void);
  59extern void lmb_analyze(void);
  60extern long lmb_add(unsigned long, unsigned long);
  61#ifdef CONFIG_MSCHUNKS
  62extern long lmb_add_io(unsigned long base, unsigned long size);
  63#endif /* CONFIG_MSCHUNKS */
  64extern long lmb_reserve(unsigned long, unsigned long);
  65extern unsigned long lmb_alloc(unsigned long, unsigned long);
  66extern unsigned long lmb_alloc_base(unsigned long, unsigned long, unsigned long);
  67extern unsigned long lmb_phys_mem_size(void);
  68extern unsigned long lmb_end_of_DRAM(void);
  69extern unsigned long lmb_abs_to_phys(unsigned long);
  70extern void lmb_dump(char *);
  71
  72static inline unsigned long
  73lmb_addrs_overlap(unsigned long base1, unsigned long size1,
  74                  unsigned long base2, unsigned long size2)
  75{
  76        return ((base1 < (base2+size2)) && (base2 < (base1+size1)));
  77}
  78
  79static inline long
  80lmb_regions_overlap(struct lmb_region *rgn, unsigned long r1, unsigned long r2)
  81{
  82        unsigned long base1 = rgn->region[r1].base;
  83        unsigned long size1 = rgn->region[r1].size;
  84        unsigned long base2 = rgn->region[r2].base;
  85        unsigned long size2 = rgn->region[r2].size;
  86
  87        return lmb_addrs_overlap(base1,size1,base2,size2);
  88}
  89
  90static inline long
  91lmb_addrs_adjacent(unsigned long base1, unsigned long size1,
  92                   unsigned long base2, unsigned long size2)
  93{
  94        if ( base2 == base1 + size1 ) {
  95                return 1;
  96        } else if ( base1 == base2 + size2 ) {
  97                return -1;
  98        }
  99        return 0;
 100}
 101
 102static inline long
 103lmb_regions_adjacent(struct lmb_region *rgn, unsigned long r1, unsigned long r2)
 104{
 105        unsigned long base1 = rgn->region[r1].base;
 106        unsigned long size1 = rgn->region[r1].size;
 107        unsigned long type1 = rgn->region[r1].type;
 108        unsigned long base2 = rgn->region[r2].base;
 109        unsigned long size2 = rgn->region[r2].size;
 110        unsigned long type2 = rgn->region[r2].type;
 111
 112        return (type1 == type2) && lmb_addrs_adjacent(base1,size1,base2,size2);
 113}
 114
 115#endif /* _PPC64_LMB_H */
 116