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95f72d1e YL |
1 | #ifndef _LINUX_MEMBLOCK_H |
2 | #define _LINUX_MEMBLOCK_H | |
3 | #ifdef __KERNEL__ | |
4 | ||
f0b37fad | 5 | #ifdef CONFIG_HAVE_MEMBLOCK |
95f72d1e YL |
6 | /* |
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 | ||
37d8d4bf | 20 | #define INIT_MEMBLOCK_REGIONS 128 |
95f72d1e | 21 | |
e3239ff9 | 22 | struct memblock_region { |
2898cc4c BH |
23 | phys_addr_t base; |
24 | phys_addr_t size; | |
7c0caeb8 TH |
25 | #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP |
26 | int nid; | |
27 | #endif | |
95f72d1e YL |
28 | }; |
29 | ||
e3239ff9 | 30 | struct memblock_type { |
bf23c51f BH |
31 | unsigned long cnt; /* number of regions */ |
32 | unsigned long max; /* size of the allocated array */ | |
1440c4e2 | 33 | phys_addr_t total_size; /* size of all regions */ |
bf23c51f | 34 | struct memblock_region *regions; |
95f72d1e YL |
35 | }; |
36 | ||
37 | struct memblock { | |
2898cc4c | 38 | phys_addr_t current_limit; |
e3239ff9 BH |
39 | struct memblock_type memory; |
40 | struct memblock_type reserved; | |
95f72d1e YL |
41 | }; |
42 | ||
43 | extern struct memblock memblock; | |
5e63cf43 | 44 | extern int memblock_debug; |
5e63cf43 YL |
45 | |
46 | #define memblock_dbg(fmt, ...) \ | |
47 | if (memblock_debug) printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__) | |
95f72d1e | 48 | |
7bd0b0f0 TH |
49 | phys_addr_t memblock_find_in_range_node(phys_addr_t start, phys_addr_t end, |
50 | phys_addr_t size, phys_addr_t align, int nid); | |
fc769a8e TH |
51 | phys_addr_t memblock_find_in_range(phys_addr_t start, phys_addr_t end, |
52 | phys_addr_t size, phys_addr_t align); | |
7950c407 YL |
53 | int memblock_free_reserved_regions(void); |
54 | int memblock_reserve_reserved_regions(void); | |
5303b68f | 55 | |
1aadc056 | 56 | void memblock_allow_resize(void); |
7fb0bc3f | 57 | int memblock_add_node(phys_addr_t base, phys_addr_t size, int nid); |
581adcbe TH |
58 | int memblock_add(phys_addr_t base, phys_addr_t size); |
59 | int memblock_remove(phys_addr_t base, phys_addr_t size); | |
60 | int memblock_free(phys_addr_t base, phys_addr_t size); | |
61 | int memblock_reserve(phys_addr_t base, phys_addr_t size); | |
e63075a3 | 62 | |
0ee332c1 TH |
63 | #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP |
64 | void __next_mem_pfn_range(int *idx, int nid, unsigned long *out_start_pfn, | |
65 | unsigned long *out_end_pfn, int *out_nid); | |
66 | ||
67 | /** | |
68 | * for_each_mem_pfn_range - early memory pfn range iterator | |
69 | * @i: an integer used as loop variable | |
70 | * @nid: node selector, %MAX_NUMNODES for all nodes | |
71 | * @p_start: ptr to ulong for start pfn of the range, can be %NULL | |
72 | * @p_end: ptr to ulong for end pfn of the range, can be %NULL | |
73 | * @p_nid: ptr to int for nid of the range, can be %NULL | |
74 | * | |
75 | * Walks over configured memory ranges. Available after early_node_map is | |
76 | * populated. | |
77 | */ | |
78 | #define for_each_mem_pfn_range(i, nid, p_start, p_end, p_nid) \ | |
79 | for (i = -1, __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid); \ | |
80 | i >= 0; __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid)) | |
81 | #endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */ | |
82 | ||
581adcbe TH |
83 | void __next_free_mem_range(u64 *idx, int nid, phys_addr_t *out_start, |
84 | phys_addr_t *out_end, int *out_nid); | |
35fd0808 TH |
85 | |
86 | /** | |
87 | * for_each_free_mem_range - iterate through free memblock areas | |
88 | * @i: u64 used as loop variable | |
89 | * @nid: node selector, %MAX_NUMNODES for all nodes | |
90 | * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL | |
91 | * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL | |
92 | * @p_nid: ptr to int for nid of the range, can be %NULL | |
93 | * | |
94 | * Walks over free (memory && !reserved) areas of memblock. Available as | |
95 | * soon as memblock is initialized. | |
96 | */ | |
97 | #define for_each_free_mem_range(i, nid, p_start, p_end, p_nid) \ | |
98 | for (i = 0, \ | |
99 | __next_free_mem_range(&i, nid, p_start, p_end, p_nid); \ | |
100 | i != (u64)ULLONG_MAX; \ | |
101 | __next_free_mem_range(&i, nid, p_start, p_end, p_nid)) | |
102 | ||
7bd0b0f0 TH |
103 | void __next_free_mem_range_rev(u64 *idx, int nid, phys_addr_t *out_start, |
104 | phys_addr_t *out_end, int *out_nid); | |
105 | ||
106 | /** | |
107 | * for_each_free_mem_range_reverse - rev-iterate through free memblock areas | |
108 | * @i: u64 used as loop variable | |
109 | * @nid: node selector, %MAX_NUMNODES for all nodes | |
110 | * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL | |
111 | * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL | |
112 | * @p_nid: ptr to int for nid of the range, can be %NULL | |
113 | * | |
114 | * Walks over free (memory && !reserved) areas of memblock in reverse | |
115 | * order. Available as soon as memblock is initialized. | |
116 | */ | |
117 | #define for_each_free_mem_range_reverse(i, nid, p_start, p_end, p_nid) \ | |
118 | for (i = (u64)ULLONG_MAX, \ | |
119 | __next_free_mem_range_rev(&i, nid, p_start, p_end, p_nid); \ | |
120 | i != (u64)ULLONG_MAX; \ | |
121 | __next_free_mem_range_rev(&i, nid, p_start, p_end, p_nid)) | |
122 | ||
7c0caeb8 | 123 | #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP |
581adcbe | 124 | int memblock_set_node(phys_addr_t base, phys_addr_t size, int nid); |
7c0caeb8 TH |
125 | |
126 | static inline void memblock_set_region_node(struct memblock_region *r, int nid) | |
127 | { | |
128 | r->nid = nid; | |
129 | } | |
130 | ||
131 | static inline int memblock_get_region_node(const struct memblock_region *r) | |
132 | { | |
133 | return r->nid; | |
134 | } | |
135 | #else | |
136 | static inline void memblock_set_region_node(struct memblock_region *r, int nid) | |
137 | { | |
138 | } | |
139 | ||
140 | static inline int memblock_get_region_node(const struct memblock_region *r) | |
141 | { | |
142 | return 0; | |
143 | } | |
144 | #endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */ | |
145 | ||
581adcbe TH |
146 | phys_addr_t memblock_alloc_nid(phys_addr_t size, phys_addr_t align, int nid); |
147 | phys_addr_t memblock_alloc_try_nid(phys_addr_t size, phys_addr_t align, int nid); | |
9d1e2492 | 148 | |
581adcbe | 149 | phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align); |
e63075a3 BH |
150 | |
151 | /* Flags for memblock_alloc_base() amd __memblock_alloc_base() */ | |
2898cc4c | 152 | #define MEMBLOCK_ALLOC_ANYWHERE (~(phys_addr_t)0) |
e63075a3 BH |
153 | #define MEMBLOCK_ALLOC_ACCESSIBLE 0 |
154 | ||
581adcbe TH |
155 | phys_addr_t memblock_alloc_base(phys_addr_t size, phys_addr_t align, |
156 | phys_addr_t max_addr); | |
157 | phys_addr_t __memblock_alloc_base(phys_addr_t size, phys_addr_t align, | |
158 | phys_addr_t max_addr); | |
159 | phys_addr_t memblock_phys_mem_size(void); | |
160 | phys_addr_t memblock_start_of_DRAM(void); | |
161 | phys_addr_t memblock_end_of_DRAM(void); | |
162 | void memblock_enforce_memory_limit(phys_addr_t memory_limit); | |
163 | int memblock_is_memory(phys_addr_t addr); | |
164 | int memblock_is_region_memory(phys_addr_t base, phys_addr_t size); | |
165 | int memblock_is_reserved(phys_addr_t addr); | |
166 | int memblock_is_region_reserved(phys_addr_t base, phys_addr_t size); | |
167 | ||
4ff7b82f TH |
168 | extern void __memblock_dump_all(void); |
169 | ||
170 | static inline void memblock_dump_all(void) | |
171 | { | |
172 | if (memblock_debug) | |
173 | __memblock_dump_all(); | |
174 | } | |
95f72d1e | 175 | |
e63075a3 BH |
176 | /** |
177 | * memblock_set_current_limit - Set the current allocation limit to allow | |
178 | * limiting allocations to what is currently | |
179 | * accessible during boot | |
180 | * @limit: New limit value (physical address) | |
181 | */ | |
581adcbe | 182 | void memblock_set_current_limit(phys_addr_t limit); |
e63075a3 | 183 | |
35a1f0bd | 184 | |
5b385f25 BH |
185 | /* |
186 | * pfn conversion functions | |
187 | * | |
188 | * While the memory MEMBLOCKs should always be page aligned, the reserved | |
189 | * MEMBLOCKs may not be. This accessor attempt to provide a very clear | |
190 | * idea of what they return for such non aligned MEMBLOCKs. | |
191 | */ | |
192 | ||
193 | /** | |
c7fc2de0 | 194 | * memblock_region_memory_base_pfn - Return the lowest pfn intersecting with the memory region |
5b385f25 BH |
195 | * @reg: memblock_region structure |
196 | */ | |
c7fc2de0 | 197 | static inline unsigned long memblock_region_memory_base_pfn(const struct memblock_region *reg) |
5b385f25 | 198 | { |
c7fc2de0 | 199 | return PFN_UP(reg->base); |
5b385f25 BH |
200 | } |
201 | ||
202 | /** | |
c7fc2de0 | 203 | * memblock_region_memory_end_pfn - Return the end_pfn this region |
5b385f25 BH |
204 | * @reg: memblock_region structure |
205 | */ | |
c7fc2de0 | 206 | static inline unsigned long memblock_region_memory_end_pfn(const struct memblock_region *reg) |
5b385f25 | 207 | { |
c7fc2de0 | 208 | return PFN_DOWN(reg->base + reg->size); |
5b385f25 BH |
209 | } |
210 | ||
211 | /** | |
c7fc2de0 | 212 | * memblock_region_reserved_base_pfn - Return the lowest pfn intersecting with the reserved region |
5b385f25 BH |
213 | * @reg: memblock_region structure |
214 | */ | |
c7fc2de0 | 215 | static inline unsigned long memblock_region_reserved_base_pfn(const struct memblock_region *reg) |
5b385f25 | 216 | { |
c7fc2de0 | 217 | return PFN_DOWN(reg->base); |
5b385f25 BH |
218 | } |
219 | ||
220 | /** | |
c7fc2de0 | 221 | * memblock_region_reserved_end_pfn - Return the end_pfn this region |
5b385f25 BH |
222 | * @reg: memblock_region structure |
223 | */ | |
c7fc2de0 | 224 | static inline unsigned long memblock_region_reserved_end_pfn(const struct memblock_region *reg) |
5b385f25 | 225 | { |
c7fc2de0 | 226 | return PFN_UP(reg->base + reg->size); |
5b385f25 BH |
227 | } |
228 | ||
229 | #define for_each_memblock(memblock_type, region) \ | |
230 | for (region = memblock.memblock_type.regions; \ | |
231 | region < (memblock.memblock_type.regions + memblock.memblock_type.cnt); \ | |
232 | region++) | |
233 | ||
234 | ||
c378ddd5 | 235 | #ifdef CONFIG_ARCH_DISCARD_MEMBLOCK |
67e24bcb TH |
236 | #define __init_memblock __meminit |
237 | #define __initdata_memblock __meminitdata | |
10d06439 YL |
238 | #else |
239 | #define __init_memblock | |
240 | #define __initdata_memblock | |
241 | #endif | |
242 | ||
95dde501 YL |
243 | #else |
244 | static inline phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align) | |
245 | { | |
1f5026a7 | 246 | return 0; |
95dde501 YL |
247 | } |
248 | ||
f0b37fad YL |
249 | #endif /* CONFIG_HAVE_MEMBLOCK */ |
250 | ||
95f72d1e YL |
251 | #endif /* __KERNEL__ */ |
252 | ||
253 | #endif /* _LINUX_MEMBLOCK_H */ |