Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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kernel
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linux
1#ifndef _LINUX_LMB_H
2#define _LINUX_LMB_H
3#ifdef __KERNEL__
4
5/*
6 * Logical memory blocks.
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/init.h>
17#include <linux/mm.h>
18
19#define MAX_LMB_REGIONS 128
20
21struct lmb_property {
22 u64 base;
23 u64 size;
24};
25
26struct lmb_region {
27 unsigned long cnt;
28 u64 size;
29 struct lmb_property region[MAX_LMB_REGIONS+1];
30};
31
32struct lmb {
33 unsigned long debug;
34 u64 rmo_size;
35 struct lmb_region memory;
36 struct lmb_region reserved;
37};
38
39extern struct lmb lmb;
40
41extern void __init lmb_init(void);
42extern void __init lmb_analyze(void);
43extern long lmb_add(u64 base, u64 size);
44extern long lmb_remove(u64 base, u64 size);
45extern long __init lmb_free(u64 base, u64 size);
46extern long __init lmb_reserve(u64 base, u64 size);
47extern u64 __init lmb_alloc_nid(u64 size, u64 align, int nid,
48 u64 (*nid_range)(u64, u64, int *));
49extern u64 __init lmb_alloc(u64 size, u64 align);
50extern u64 __init lmb_alloc_base(u64 size,
51 u64, u64 max_addr);
52extern u64 __init __lmb_alloc_base(u64 size,
53 u64 align, u64 max_addr);
54extern u64 __init lmb_phys_mem_size(void);
55extern u64 lmb_end_of_DRAM(void);
56extern void __init lmb_enforce_memory_limit(u64 memory_limit);
57extern int __init lmb_is_reserved(u64 addr);
58extern int lmb_is_region_reserved(u64 base, u64 size);
59extern int lmb_find(struct lmb_property *res);
60
61extern void lmb_dump_all(void);
62
63static inline u64
64lmb_size_bytes(struct lmb_region *type, unsigned long region_nr)
65{
66 return type->region[region_nr].size;
67}
68static inline u64
69lmb_size_pages(struct lmb_region *type, unsigned long region_nr)
70{
71 return lmb_size_bytes(type, region_nr) >> PAGE_SHIFT;
72}
73static inline u64
74lmb_start_pfn(struct lmb_region *type, unsigned long region_nr)
75{
76 return type->region[region_nr].base >> PAGE_SHIFT;
77}
78static inline u64
79lmb_end_pfn(struct lmb_region *type, unsigned long region_nr)
80{
81 return lmb_start_pfn(type, region_nr) +
82 lmb_size_pages(type, region_nr);
83}
84
85#include <asm/lmb.h>
86
87#endif /* __KERNEL__ */
88
89#endif /* _LINUX_LMB_H */