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