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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); | |
29f67386 | 53 | phys_addr_t get_allocated_memblock_reserved_regions_info(phys_addr_t *addr); |
1aadc056 | 54 | void memblock_allow_resize(void); |
7fb0bc3f | 55 | int memblock_add_node(phys_addr_t base, phys_addr_t size, int nid); |
581adcbe TH |
56 | int memblock_add(phys_addr_t base, phys_addr_t size); |
57 | int memblock_remove(phys_addr_t base, phys_addr_t size); | |
58 | int memblock_free(phys_addr_t base, phys_addr_t size); | |
59 | int memblock_reserve(phys_addr_t base, phys_addr_t size); | |
e63075a3 | 60 | |
0ee332c1 TH |
61 | #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP |
62 | void __next_mem_pfn_range(int *idx, int nid, unsigned long *out_start_pfn, | |
63 | unsigned long *out_end_pfn, int *out_nid); | |
64 | ||
65 | /** | |
66 | * for_each_mem_pfn_range - early memory pfn range iterator | |
67 | * @i: an integer used as loop variable | |
68 | * @nid: node selector, %MAX_NUMNODES for all nodes | |
69 | * @p_start: ptr to ulong for start pfn of the range, can be %NULL | |
70 | * @p_end: ptr to ulong for end pfn of the range, can be %NULL | |
71 | * @p_nid: ptr to int for nid of the range, can be %NULL | |
72 | * | |
f2d52fe5 | 73 | * Walks over configured memory ranges. |
0ee332c1 TH |
74 | */ |
75 | #define for_each_mem_pfn_range(i, nid, p_start, p_end, p_nid) \ | |
76 | for (i = -1, __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid); \ | |
77 | i >= 0; __next_mem_pfn_range(&i, nid, p_start, p_end, p_nid)) | |
78 | #endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */ | |
79 | ||
581adcbe TH |
80 | void __next_free_mem_range(u64 *idx, int nid, phys_addr_t *out_start, |
81 | phys_addr_t *out_end, int *out_nid); | |
35fd0808 TH |
82 | |
83 | /** | |
84 | * for_each_free_mem_range - iterate through free memblock areas | |
85 | * @i: u64 used as loop variable | |
86 | * @nid: node selector, %MAX_NUMNODES for all nodes | |
87 | * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL | |
88 | * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL | |
89 | * @p_nid: ptr to int for nid of the range, can be %NULL | |
90 | * | |
91 | * Walks over free (memory && !reserved) areas of memblock. Available as | |
92 | * soon as memblock is initialized. | |
93 | */ | |
94 | #define for_each_free_mem_range(i, nid, p_start, p_end, p_nid) \ | |
95 | for (i = 0, \ | |
96 | __next_free_mem_range(&i, nid, p_start, p_end, p_nid); \ | |
97 | i != (u64)ULLONG_MAX; \ | |
98 | __next_free_mem_range(&i, nid, p_start, p_end, p_nid)) | |
99 | ||
7bd0b0f0 TH |
100 | void __next_free_mem_range_rev(u64 *idx, int nid, phys_addr_t *out_start, |
101 | phys_addr_t *out_end, int *out_nid); | |
102 | ||
103 | /** | |
104 | * for_each_free_mem_range_reverse - rev-iterate through free memblock areas | |
105 | * @i: u64 used as loop variable | |
106 | * @nid: node selector, %MAX_NUMNODES for all nodes | |
107 | * @p_start: ptr to phys_addr_t for start address of the range, can be %NULL | |
108 | * @p_end: ptr to phys_addr_t for end address of the range, can be %NULL | |
109 | * @p_nid: ptr to int for nid of the range, can be %NULL | |
110 | * | |
111 | * Walks over free (memory && !reserved) areas of memblock in reverse | |
112 | * order. Available as soon as memblock is initialized. | |
113 | */ | |
114 | #define for_each_free_mem_range_reverse(i, nid, p_start, p_end, p_nid) \ | |
115 | for (i = (u64)ULLONG_MAX, \ | |
116 | __next_free_mem_range_rev(&i, nid, p_start, p_end, p_nid); \ | |
117 | i != (u64)ULLONG_MAX; \ | |
118 | __next_free_mem_range_rev(&i, nid, p_start, p_end, p_nid)) | |
119 | ||
7c0caeb8 | 120 | #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP |
581adcbe | 121 | int memblock_set_node(phys_addr_t base, phys_addr_t size, int nid); |
7c0caeb8 TH |
122 | |
123 | static inline void memblock_set_region_node(struct memblock_region *r, int nid) | |
124 | { | |
125 | r->nid = nid; | |
126 | } | |
127 | ||
128 | static inline int memblock_get_region_node(const struct memblock_region *r) | |
129 | { | |
130 | return r->nid; | |
131 | } | |
132 | #else | |
133 | static inline void memblock_set_region_node(struct memblock_region *r, int nid) | |
134 | { | |
135 | } | |
136 | ||
137 | static inline int memblock_get_region_node(const struct memblock_region *r) | |
138 | { | |
139 | return 0; | |
140 | } | |
141 | #endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */ | |
142 | ||
581adcbe TH |
143 | phys_addr_t memblock_alloc_nid(phys_addr_t size, phys_addr_t align, int nid); |
144 | phys_addr_t memblock_alloc_try_nid(phys_addr_t size, phys_addr_t align, int nid); | |
9d1e2492 | 145 | |
581adcbe | 146 | phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align); |
e63075a3 BH |
147 | |
148 | /* Flags for memblock_alloc_base() amd __memblock_alloc_base() */ | |
2898cc4c | 149 | #define MEMBLOCK_ALLOC_ANYWHERE (~(phys_addr_t)0) |
e63075a3 BH |
150 | #define MEMBLOCK_ALLOC_ACCESSIBLE 0 |
151 | ||
581adcbe TH |
152 | phys_addr_t memblock_alloc_base(phys_addr_t size, phys_addr_t align, |
153 | phys_addr_t max_addr); | |
154 | phys_addr_t __memblock_alloc_base(phys_addr_t size, phys_addr_t align, | |
155 | phys_addr_t max_addr); | |
156 | phys_addr_t memblock_phys_mem_size(void); | |
157 | phys_addr_t memblock_start_of_DRAM(void); | |
158 | phys_addr_t memblock_end_of_DRAM(void); | |
159 | void memblock_enforce_memory_limit(phys_addr_t memory_limit); | |
160 | int memblock_is_memory(phys_addr_t addr); | |
161 | int memblock_is_region_memory(phys_addr_t base, phys_addr_t size); | |
162 | int memblock_is_reserved(phys_addr_t addr); | |
163 | int memblock_is_region_reserved(phys_addr_t base, phys_addr_t size); | |
164 | ||
4ff7b82f TH |
165 | extern void __memblock_dump_all(void); |
166 | ||
167 | static inline void memblock_dump_all(void) | |
168 | { | |
169 | if (memblock_debug) | |
170 | __memblock_dump_all(); | |
171 | } | |
95f72d1e | 172 | |
e63075a3 BH |
173 | /** |
174 | * memblock_set_current_limit - Set the current allocation limit to allow | |
175 | * limiting allocations to what is currently | |
176 | * accessible during boot | |
177 | * @limit: New limit value (physical address) | |
178 | */ | |
581adcbe | 179 | void memblock_set_current_limit(phys_addr_t limit); |
e63075a3 | 180 | |
35a1f0bd | 181 | |
5b385f25 BH |
182 | /* |
183 | * pfn conversion functions | |
184 | * | |
185 | * While the memory MEMBLOCKs should always be page aligned, the reserved | |
186 | * MEMBLOCKs may not be. This accessor attempt to provide a very clear | |
187 | * idea of what they return for such non aligned MEMBLOCKs. | |
188 | */ | |
189 | ||
190 | /** | |
c7fc2de0 | 191 | * memblock_region_memory_base_pfn - Return the lowest pfn intersecting with the memory region |
5b385f25 BH |
192 | * @reg: memblock_region structure |
193 | */ | |
c7fc2de0 | 194 | static inline unsigned long memblock_region_memory_base_pfn(const struct memblock_region *reg) |
5b385f25 | 195 | { |
c7fc2de0 | 196 | return PFN_UP(reg->base); |
5b385f25 BH |
197 | } |
198 | ||
199 | /** | |
c7fc2de0 | 200 | * memblock_region_memory_end_pfn - Return the end_pfn this region |
5b385f25 BH |
201 | * @reg: memblock_region structure |
202 | */ | |
c7fc2de0 | 203 | static inline unsigned long memblock_region_memory_end_pfn(const struct memblock_region *reg) |
5b385f25 | 204 | { |
c7fc2de0 | 205 | return PFN_DOWN(reg->base + reg->size); |
5b385f25 BH |
206 | } |
207 | ||
208 | /** | |
c7fc2de0 | 209 | * memblock_region_reserved_base_pfn - Return the lowest pfn intersecting with the reserved region |
5b385f25 BH |
210 | * @reg: memblock_region structure |
211 | */ | |
c7fc2de0 | 212 | static inline unsigned long memblock_region_reserved_base_pfn(const struct memblock_region *reg) |
5b385f25 | 213 | { |
c7fc2de0 | 214 | return PFN_DOWN(reg->base); |
5b385f25 BH |
215 | } |
216 | ||
217 | /** | |
c7fc2de0 | 218 | * memblock_region_reserved_end_pfn - Return the end_pfn this region |
5b385f25 BH |
219 | * @reg: memblock_region structure |
220 | */ | |
c7fc2de0 | 221 | static inline unsigned long memblock_region_reserved_end_pfn(const struct memblock_region *reg) |
5b385f25 | 222 | { |
c7fc2de0 | 223 | return PFN_UP(reg->base + reg->size); |
5b385f25 BH |
224 | } |
225 | ||
226 | #define for_each_memblock(memblock_type, region) \ | |
227 | for (region = memblock.memblock_type.regions; \ | |
228 | region < (memblock.memblock_type.regions + memblock.memblock_type.cnt); \ | |
229 | region++) | |
230 | ||
231 | ||
c378ddd5 | 232 | #ifdef CONFIG_ARCH_DISCARD_MEMBLOCK |
67e24bcb TH |
233 | #define __init_memblock __meminit |
234 | #define __initdata_memblock __meminitdata | |
10d06439 YL |
235 | #else |
236 | #define __init_memblock | |
237 | #define __initdata_memblock | |
238 | #endif | |
239 | ||
95dde501 YL |
240 | #else |
241 | static inline phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align) | |
242 | { | |
1f5026a7 | 243 | return 0; |
95dde501 YL |
244 | } |
245 | ||
f0b37fad YL |
246 | #endif /* CONFIG_HAVE_MEMBLOCK */ |
247 | ||
95f72d1e YL |
248 | #endif /* __KERNEL__ */ |
249 | ||
250 | #endif /* _LINUX_MEMBLOCK_H */ |