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Yinghai Lu95f72d12010-07-12 14:36:09 +10001#ifndef _LINUX_MEMBLOCK_H
2#define _LINUX_MEMBLOCK_H
3#ifdef __KERNEL__
4
Yinghai Luf0b37fa2010-07-28 15:28:21 +10005#ifdef CONFIG_HAVE_MEMBLOCK
Yinghai Lu95f72d12010-07-12 14:36:09 +10006/*
7 * Logical memory blocks.
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 <linux/mm.h>
19
Yinghai Lu37d8d4b2010-07-28 15:20:58 +100020#define INIT_MEMBLOCK_REGIONS 128
Yinghai Lu95f72d12010-07-12 14:36:09 +100021
Benjamin Herrenschmidte3239ff2010-08-04 14:06:41 +100022struct memblock_region {
Benjamin Herrenschmidt2898cc42010-08-04 13:34:42 +100023 phys_addr_t base;
24 phys_addr_t size;
Tejun Heo7c0caeb2011-07-14 11:43:42 +020025#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
26 int nid;
27#endif
Yinghai Lu95f72d12010-07-12 14:36:09 +100028};
29
Benjamin Herrenschmidte3239ff2010-08-04 14:06:41 +100030struct memblock_type {
Benjamin Herrenschmidtbf23c512010-07-06 15:39:06 -070031 unsigned long cnt; /* number of regions */
32 unsigned long max; /* size of the allocated array */
Tejun Heo1440c4e2011-12-08 10:22:08 -080033 phys_addr_t total_size; /* size of all regions */
Benjamin Herrenschmidtbf23c512010-07-06 15:39:06 -070034 struct memblock_region *regions;
Yinghai Lu95f72d12010-07-12 14:36:09 +100035};
36
37struct memblock {
Benjamin Herrenschmidt2898cc42010-08-04 13:34:42 +100038 phys_addr_t current_limit;
Benjamin Herrenschmidte3239ff2010-08-04 14:06:41 +100039 struct memblock_type memory;
40 struct memblock_type reserved;
Yinghai Lu95f72d12010-07-12 14:36:09 +100041};
42
43extern struct memblock memblock;
Yinghai Lu5e63cf42010-07-28 15:07:21 +100044extern int memblock_debug;
Yinghai Lu5e63cf42010-07-28 15:07:21 +100045
46#define memblock_dbg(fmt, ...) \
47 if (memblock_debug) printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__)
Yinghai Lu95f72d12010-07-12 14:36:09 +100048
Tejun Heofc769a82011-07-12 09:58:10 +020049phys_addr_t memblock_find_in_range(phys_addr_t start, phys_addr_t end,
50 phys_addr_t size, phys_addr_t align);
Yinghai Lu7950c402010-08-25 13:39:14 -070051int memblock_free_reserved_regions(void);
52int memblock_reserve_reserved_regions(void);
Yinghai Lu5303b682010-07-28 15:38:40 +100053
Tejun Heo1aadc052011-12-08 10:22:08 -080054void memblock_allow_resize(void);
Tejun Heo581adcb2011-12-08 10:22:06 -080055int memblock_add(phys_addr_t base, phys_addr_t size);
56int memblock_remove(phys_addr_t base, phys_addr_t size);
57int memblock_free(phys_addr_t base, phys_addr_t size);
58int memblock_reserve(phys_addr_t base, phys_addr_t size);
Benjamin Herrenschmidte63075a2010-07-06 15:39:01 -070059
Tejun Heo581adcb2011-12-08 10:22:06 -080060void __next_free_mem_range(u64 *idx, int nid, phys_addr_t *out_start,
61 phys_addr_t *out_end, int *out_nid);
Tejun Heo35fd0802011-07-12 11:15:59 +020062
63/**
64 * for_each_free_mem_range - iterate through free memblock areas
65 * @i: u64 used as loop variable
66 * @nid: node selector, %MAX_NUMNODES for all nodes
67 * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL
68 * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL
69 * @p_nid: ptr to int for nid of the range, can be %NULL
70 *
71 * Walks over free (memory && !reserved) areas of memblock. Available as
72 * soon as memblock is initialized.
73 */
74#define for_each_free_mem_range(i, nid, p_start, p_end, p_nid) \
75 for (i = 0, \
76 __next_free_mem_range(&i, nid, p_start, p_end, p_nid); \
77 i != (u64)ULLONG_MAX; \
78 __next_free_mem_range(&i, nid, p_start, p_end, p_nid))
79
Tejun Heo7c0caeb2011-07-14 11:43:42 +020080#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
Tejun Heo581adcb2011-12-08 10:22:06 -080081int memblock_set_node(phys_addr_t base, phys_addr_t size, int nid);
Tejun Heo7c0caeb2011-07-14 11:43:42 +020082
83static inline void memblock_set_region_node(struct memblock_region *r, int nid)
84{
85 r->nid = nid;
86}
87
88static inline int memblock_get_region_node(const struct memblock_region *r)
89{
90 return r->nid;
91}
92#else
93static inline void memblock_set_region_node(struct memblock_region *r, int nid)
94{
95}
96
97static inline int memblock_get_region_node(const struct memblock_region *r)
98{
99 return 0;
100}
101#endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */
102
Benjamin Herrenschmidtc196f762010-07-06 15:39:16 -0700103/* The numa aware allocator is only available if
104 * CONFIG_ARCH_POPULATES_NODE_MAP is set
105 */
Tejun Heo581adcb2011-12-08 10:22:06 -0800106phys_addr_t memblock_find_in_range_node(phys_addr_t start, phys_addr_t end,
107 phys_addr_t size, phys_addr_t align, int nid);
108phys_addr_t memblock_alloc_nid(phys_addr_t size, phys_addr_t align, int nid);
109phys_addr_t memblock_alloc_try_nid(phys_addr_t size, phys_addr_t align, int nid);
Benjamin Herrenschmidt9d1e2492010-07-06 15:39:17 -0700110
Tejun Heo581adcb2011-12-08 10:22:06 -0800111phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align);
Benjamin Herrenschmidte63075a2010-07-06 15:39:01 -0700112
113/* Flags for memblock_alloc_base() amd __memblock_alloc_base() */
Benjamin Herrenschmidt2898cc42010-08-04 13:34:42 +1000114#define MEMBLOCK_ALLOC_ANYWHERE (~(phys_addr_t)0)
Benjamin Herrenschmidte63075a2010-07-06 15:39:01 -0700115#define MEMBLOCK_ALLOC_ACCESSIBLE 0
116
Tejun Heo581adcb2011-12-08 10:22:06 -0800117phys_addr_t memblock_alloc_base(phys_addr_t size, phys_addr_t align,
118 phys_addr_t max_addr);
119phys_addr_t __memblock_alloc_base(phys_addr_t size, phys_addr_t align,
120 phys_addr_t max_addr);
121phys_addr_t memblock_phys_mem_size(void);
122phys_addr_t memblock_start_of_DRAM(void);
123phys_addr_t memblock_end_of_DRAM(void);
124void memblock_enforce_memory_limit(phys_addr_t memory_limit);
125int memblock_is_memory(phys_addr_t addr);
126int memblock_is_region_memory(phys_addr_t base, phys_addr_t size);
127int memblock_is_reserved(phys_addr_t addr);
128int memblock_is_region_reserved(phys_addr_t base, phys_addr_t size);
Yinghai Lu95f72d12010-07-12 14:36:09 +1000129
Tejun Heo4ff7b822011-12-08 10:22:06 -0800130extern void __memblock_dump_all(void);
131
132static inline void memblock_dump_all(void)
133{
134 if (memblock_debug)
135 __memblock_dump_all();
136}
Yinghai Lu95f72d12010-07-12 14:36:09 +1000137
Benjamin Herrenschmidte63075a2010-07-06 15:39:01 -0700138/**
139 * memblock_set_current_limit - Set the current allocation limit to allow
140 * limiting allocations to what is currently
141 * accessible during boot
142 * @limit: New limit value (physical address)
143 */
Tejun Heo581adcb2011-12-08 10:22:06 -0800144void memblock_set_current_limit(phys_addr_t limit);
Benjamin Herrenschmidte63075a2010-07-06 15:39:01 -0700145
Benjamin Herrenschmidt35a1f0b2010-07-06 15:38:58 -0700146
Benjamin Herrenschmidt5b385f22010-08-04 13:40:38 +1000147/*
148 * pfn conversion functions
149 *
150 * While the memory MEMBLOCKs should always be page aligned, the reserved
151 * MEMBLOCKs may not be. This accessor attempt to provide a very clear
152 * idea of what they return for such non aligned MEMBLOCKs.
153 */
154
155/**
Yinghai Luc7fc2de2010-10-12 14:07:09 -0700156 * memblock_region_memory_base_pfn - Return the lowest pfn intersecting with the memory region
Benjamin Herrenschmidt5b385f22010-08-04 13:40:38 +1000157 * @reg: memblock_region structure
158 */
Yinghai Luc7fc2de2010-10-12 14:07:09 -0700159static inline unsigned long memblock_region_memory_base_pfn(const struct memblock_region *reg)
Benjamin Herrenschmidt5b385f22010-08-04 13:40:38 +1000160{
Yinghai Luc7fc2de2010-10-12 14:07:09 -0700161 return PFN_UP(reg->base);
Benjamin Herrenschmidt5b385f22010-08-04 13:40:38 +1000162}
163
164/**
Yinghai Luc7fc2de2010-10-12 14:07:09 -0700165 * memblock_region_memory_end_pfn - Return the end_pfn this region
Benjamin Herrenschmidt5b385f22010-08-04 13:40:38 +1000166 * @reg: memblock_region structure
167 */
Yinghai Luc7fc2de2010-10-12 14:07:09 -0700168static inline unsigned long memblock_region_memory_end_pfn(const struct memblock_region *reg)
Benjamin Herrenschmidt5b385f22010-08-04 13:40:38 +1000169{
Yinghai Luc7fc2de2010-10-12 14:07:09 -0700170 return PFN_DOWN(reg->base + reg->size);
Benjamin Herrenschmidt5b385f22010-08-04 13:40:38 +1000171}
172
173/**
Yinghai Luc7fc2de2010-10-12 14:07:09 -0700174 * memblock_region_reserved_base_pfn - Return the lowest pfn intersecting with the reserved region
Benjamin Herrenschmidt5b385f22010-08-04 13:40:38 +1000175 * @reg: memblock_region structure
176 */
Yinghai Luc7fc2de2010-10-12 14:07:09 -0700177static inline unsigned long memblock_region_reserved_base_pfn(const struct memblock_region *reg)
Benjamin Herrenschmidt5b385f22010-08-04 13:40:38 +1000178{
Yinghai Luc7fc2de2010-10-12 14:07:09 -0700179 return PFN_DOWN(reg->base);
Benjamin Herrenschmidt5b385f22010-08-04 13:40:38 +1000180}
181
182/**
Yinghai Luc7fc2de2010-10-12 14:07:09 -0700183 * memblock_region_reserved_end_pfn - Return the end_pfn this region
Benjamin Herrenschmidt5b385f22010-08-04 13:40:38 +1000184 * @reg: memblock_region structure
185 */
Yinghai Luc7fc2de2010-10-12 14:07:09 -0700186static inline unsigned long memblock_region_reserved_end_pfn(const struct memblock_region *reg)
Benjamin Herrenschmidt5b385f22010-08-04 13:40:38 +1000187{
Yinghai Luc7fc2de2010-10-12 14:07:09 -0700188 return PFN_UP(reg->base + reg->size);
Benjamin Herrenschmidt5b385f22010-08-04 13:40:38 +1000189}
190
191#define for_each_memblock(memblock_type, region) \
192 for (region = memblock.memblock_type.regions; \
193 region < (memblock.memblock_type.regions + memblock.memblock_type.cnt); \
194 region++)
195
196
Tejun Heoc378ddd2011-07-14 11:46:03 +0200197#ifdef CONFIG_ARCH_DISCARD_MEMBLOCK
Tejun Heo67e24bc2011-07-14 11:42:03 +0200198#define __init_memblock __meminit
199#define __initdata_memblock __meminitdata
Yinghai Lu10d06432010-07-28 15:43:02 +1000200#else
201#define __init_memblock
202#define __initdata_memblock
203#endif
204
Yinghai Lu95dde502011-05-24 17:13:19 -0700205#else
206static inline phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align)
207{
Tejun Heo1f5026a2011-07-12 09:58:09 +0200208 return 0;
Yinghai Lu95dde502011-05-24 17:13:19 -0700209}
210
Yinghai Luf0b37fa2010-07-28 15:28:21 +1000211#endif /* CONFIG_HAVE_MEMBLOCK */
212
Yinghai Lu95f72d12010-07-12 14:36:09 +1000213#endif /* __KERNEL__ */
214
215#endif /* _LINUX_MEMBLOCK_H */