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Becky Bruce1ac9f1f2007-08-15 04:45:44 +10001#ifndef _ASM_POWERPC_LMB_H
2#define _ASM_POWERPC_LMB_H
Arnd Bergmann88ced032005-12-16 22:43:46 +01003#ifdef __KERNEL__
Paul Mackerras9b6b5632005-10-06 12:06:20 +10004
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
Paul Mackerras9b6b5632005-10-06 12:06:20 +100022struct lmb_property {
23 unsigned long base;
24 unsigned long size;
25};
26
27struct lmb_region {
28 unsigned long cnt;
29 unsigned long size;
30 struct lmb_property region[MAX_LMB_REGIONS+1];
31};
32
33struct lmb {
34 unsigned long debug;
35 unsigned long rmo_size;
36 struct lmb_region memory;
37 struct lmb_region reserved;
38};
39
40extern struct lmb lmb;
41
42extern void __init lmb_init(void);
43extern void __init lmb_analyze(void);
Michael Ellerman56b5c972006-01-25 21:31:36 +130044extern long __init lmb_add(unsigned long base, unsigned long size);
45extern long __init lmb_reserve(unsigned long base, unsigned long size);
46extern unsigned long __init lmb_alloc(unsigned long size, unsigned long align);
47extern unsigned long __init lmb_alloc_base(unsigned long size,
48 unsigned long align, unsigned long max_addr);
49extern unsigned long __init __lmb_alloc_base(unsigned long size,
50 unsigned long align, unsigned long max_addr);
Paul Mackerras9b6b5632005-10-06 12:06:20 +100051extern unsigned long __init lmb_phys_mem_size(void);
52extern unsigned long __init lmb_end_of_DRAM(void);
Michael Ellerman56b5c972006-01-25 21:31:36 +130053extern void __init lmb_enforce_memory_limit(unsigned long memory_limit);
Paul Mackerras9b6b5632005-10-06 12:06:20 +100054
55extern void lmb_dump_all(void);
56
Paul Mackerras9b6b5632005-10-06 12:06:20 +100057static inline unsigned long
58lmb_size_bytes(struct lmb_region *type, unsigned long region_nr)
59{
60 return type->region[region_nr].size;
61}
62static inline unsigned long
63lmb_size_pages(struct lmb_region *type, unsigned long region_nr)
64{
65 return lmb_size_bytes(type, region_nr) >> PAGE_SHIFT;
66}
67static inline unsigned long
68lmb_start_pfn(struct lmb_region *type, unsigned long region_nr)
69{
70 return type->region[region_nr].base >> PAGE_SHIFT;
71}
72static inline unsigned long
73lmb_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
Arnd Bergmann88ced032005-12-16 22:43:46 +010079#endif /* __KERNEL__ */
Becky Bruce1ac9f1f2007-08-15 04:45:44 +100080#endif /* _ASM_POWERPC_LMB_H */