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