1 /*
2 * Discontiguous memory support, Kanoj Sarcar, SGI, Nov 1999
3 */
4 #ifndef _LINUX_BOOTMEM_H
5 #define _LINUX_BOOTMEM_H
6
7 #include <linux/mmzone.h>
8 #include <linux/mm_types.h>
9 #include <asm/dma.h>
10
11 /*
12 * simple boot-time physical memory area allocator.
13 */
14
15 extern unsigned long max_low_pfn;
16 extern unsigned long min_low_pfn;
17
18 /*
19 * highest page
20 */
21 extern unsigned long max_pfn;
22
23 #ifndef CONFIG_NO_BOOTMEM
24 /*
25 * node_bootmem_map is a map pointer - the bits represent all physical
26 * memory pages (including holes) on the node.
27 */
28 typedef struct bootmem_data {
29 unsigned long node_min_pfn;
30 unsigned long node_low_pfn;
31 void *node_bootmem_map;
32 unsigned long last_end_off;
33 unsigned long hint_idx;
34 struct list_head list;
35 } bootmem_data_t;
36
37 extern bootmem_data_t bootmem_node_data[];
38 #endif
39
40 extern unsigned long bootmem_bootmap_pages(unsigned long);
41
42 extern unsigned long init_bootmem_node(pg_data_t *pgdat,
43 unsigned long freepfn,
44 unsigned long startpfn,
45 unsigned long endpfn);
46 extern unsigned long init_bootmem(unsigned long addr, unsigned long memend);
47
48 extern unsigned long free_all_bootmem(void);
49 extern void reset_node_managed_pages(pg_data_t *pgdat);
50 extern void reset_all_zones_managed_pages(void);
51
52 extern void free_bootmem_node(pg_data_t *pgdat,
53 unsigned long addr,
54 unsigned long size);
55 extern void free_bootmem(unsigned long physaddr, unsigned long size);
56 extern void free_bootmem_late(unsigned long physaddr, unsigned long size);
57
58 /*
59 * Flags for reserve_bootmem (also if CONFIG_HAVE_ARCH_BOOTMEM_NODE,
60 * the architecture-specific code should honor this).
61 *
62 * If flags is BOOTMEM_DEFAULT, then the return value is always 0 (success).
63 * If flags contains BOOTMEM_EXCLUSIVE, then -EBUSY is returned if the memory
64 * already was reserved.
65 */
66 #define BOOTMEM_DEFAULT 0
67 #define BOOTMEM_EXCLUSIVE (1<<0)
68
69 extern int reserve_bootmem(unsigned long addr,
70 unsigned long size,
71 int flags);
72 extern int reserve_bootmem_node(pg_data_t *pgdat,
73 unsigned long physaddr,
74 unsigned long size,
75 int flags);
76
77 extern void *__alloc_bootmem(unsigned long size,
78 unsigned long align,
79 unsigned long goal);
80 extern void *__alloc_bootmem_nopanic(unsigned long size,
81 unsigned long align,
82 unsigned long goal);
83 extern void *__alloc_bootmem_node(pg_data_t *pgdat,
84 unsigned long size,
85 unsigned long align,
86 unsigned long goal);
87 void *__alloc_bootmem_node_high(pg_data_t *pgdat,
88 unsigned long size,
89 unsigned long align,
90 unsigned long goal);
91 extern void *__alloc_bootmem_node_nopanic(pg_data_t *pgdat,
92 unsigned long size,
93 unsigned long align,
94 unsigned long goal);
95 void *___alloc_bootmem_node_nopanic(pg_data_t *pgdat,
96 unsigned long size,
97 unsigned long align,
98 unsigned long goal,
99 unsigned long limit);
100 extern void *__alloc_bootmem_low(unsigned long size,
101 unsigned long align,
102 unsigned long goal);
103 void *__alloc_bootmem_low_nopanic(unsigned long size,
104 unsigned long align,
105 unsigned long goal);
106 extern void *__alloc_bootmem_low_node(pg_data_t *pgdat,
107 unsigned long size,
108 unsigned long align,
109 unsigned long goal);
110
111 #ifdef CONFIG_NO_BOOTMEM
112 /* We are using top down, so it is safe to use 0 here */
113 #define BOOTMEM_LOW_LIMIT 0
114 #else
115 #define BOOTMEM_LOW_LIMIT __pa(MAX_DMA_ADDRESS)
116 #endif
117
118 #define alloc_bootmem(x) \
119 __alloc_bootmem(x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
120 #define alloc_bootmem_align(x, align) \
121 __alloc_bootmem(x, align, BOOTMEM_LOW_LIMIT)
122 #define alloc_bootmem_nopanic(x) \
123 __alloc_bootmem_nopanic(x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
124 #define alloc_bootmem_pages(x) \
125 __alloc_bootmem(x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
126 #define alloc_bootmem_pages_nopanic(x) \
127 __alloc_bootmem_nopanic(x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
128 #define alloc_bootmem_node(pgdat, x) \
129 __alloc_bootmem_node(pgdat, x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
130 #define alloc_bootmem_node_nopanic(pgdat, x) \
131 __alloc_bootmem_node_nopanic(pgdat, x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
132 #define alloc_bootmem_pages_node(pgdat, x) \
133 __alloc_bootmem_node(pgdat, x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
134 #define alloc_bootmem_pages_node_nopanic(pgdat, x) \
135 __alloc_bootmem_node_nopanic(pgdat, x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
136
137 #define alloc_bootmem_low(x) \
138 __alloc_bootmem_low(x, SMP_CACHE_BYTES, 0)
139 #define alloc_bootmem_low_pages_nopanic(x) \
140 __alloc_bootmem_low_nopanic(x, PAGE_SIZE, 0)
141 #define alloc_bootmem_low_pages(x) \
142 __alloc_bootmem_low(x, PAGE_SIZE, 0)
143 #define alloc_bootmem_low_pages_node(pgdat, x) \
144 __alloc_bootmem_low_node(pgdat, x, PAGE_SIZE, 0)
145
146
147 #if defined(CONFIG_HAVE_MEMBLOCK) && defined(CONFIG_NO_BOOTMEM)
148
149 /* FIXME: use MEMBLOCK_ALLOC_* variants here */
150 #define BOOTMEM_ALLOC_ACCESSIBLE 0
151 #define BOOTMEM_ALLOC_ANYWHERE (~(phys_addr_t)0)
152
153 /* FIXME: Move to memblock.h at a point where we remove nobootmem.c */
154 void *memblock_virt_alloc_try_nid_nopanic(phys_addr_t size,
155 phys_addr_t align, phys_addr_t min_addr,
156 phys_addr_t max_addr, int nid);
157 void *memblock_virt_alloc_try_nid(phys_addr_t size, phys_addr_t align,
158 phys_addr_t min_addr, phys_addr_t max_addr, int nid);
159 void __memblock_free_early(phys_addr_t base, phys_addr_t size);
160 void __memblock_free_late(phys_addr_t base, phys_addr_t size);
161
memblock_virt_alloc(phys_addr_t size,phys_addr_t align)162 static inline void * __init memblock_virt_alloc(
163 phys_addr_t size, phys_addr_t align)
164 {
165 return memblock_virt_alloc_try_nid(size, align, BOOTMEM_LOW_LIMIT,
166 BOOTMEM_ALLOC_ACCESSIBLE,
167 NUMA_NO_NODE);
168 }
169
memblock_virt_alloc_nopanic(phys_addr_t size,phys_addr_t align)170 static inline void * __init memblock_virt_alloc_nopanic(
171 phys_addr_t size, phys_addr_t align)
172 {
173 return memblock_virt_alloc_try_nid_nopanic(size, align,
174 BOOTMEM_LOW_LIMIT,
175 BOOTMEM_ALLOC_ACCESSIBLE,
176 NUMA_NO_NODE);
177 }
178
179 #ifndef ARCH_LOW_ADDRESS_LIMIT
180 #define ARCH_LOW_ADDRESS_LIMIT 0xffffffffUL
181 #endif
182
memblock_virt_alloc_low(phys_addr_t size,phys_addr_t align)183 static inline void * __init memblock_virt_alloc_low(
184 phys_addr_t size, phys_addr_t align)
185 {
186 return memblock_virt_alloc_try_nid(size, align,
187 BOOTMEM_LOW_LIMIT,
188 ARCH_LOW_ADDRESS_LIMIT,
189 NUMA_NO_NODE);
190 }
memblock_virt_alloc_low_nopanic(phys_addr_t size,phys_addr_t align)191 static inline void * __init memblock_virt_alloc_low_nopanic(
192 phys_addr_t size, phys_addr_t align)
193 {
194 return memblock_virt_alloc_try_nid_nopanic(size, align,
195 BOOTMEM_LOW_LIMIT,
196 ARCH_LOW_ADDRESS_LIMIT,
197 NUMA_NO_NODE);
198 }
199
memblock_virt_alloc_from_nopanic(phys_addr_t size,phys_addr_t align,phys_addr_t min_addr)200 static inline void * __init memblock_virt_alloc_from_nopanic(
201 phys_addr_t size, phys_addr_t align, phys_addr_t min_addr)
202 {
203 return memblock_virt_alloc_try_nid_nopanic(size, align, min_addr,
204 BOOTMEM_ALLOC_ACCESSIBLE,
205 NUMA_NO_NODE);
206 }
207
memblock_virt_alloc_node(phys_addr_t size,int nid)208 static inline void * __init memblock_virt_alloc_node(
209 phys_addr_t size, int nid)
210 {
211 return memblock_virt_alloc_try_nid(size, 0, BOOTMEM_LOW_LIMIT,
212 BOOTMEM_ALLOC_ACCESSIBLE, nid);
213 }
214
memblock_virt_alloc_node_nopanic(phys_addr_t size,int nid)215 static inline void * __init memblock_virt_alloc_node_nopanic(
216 phys_addr_t size, int nid)
217 {
218 return memblock_virt_alloc_try_nid_nopanic(size, 0, BOOTMEM_LOW_LIMIT,
219 BOOTMEM_ALLOC_ACCESSIBLE,
220 nid);
221 }
222
memblock_free_early(phys_addr_t base,phys_addr_t size)223 static inline void __init memblock_free_early(
224 phys_addr_t base, phys_addr_t size)
225 {
226 __memblock_free_early(base, size);
227 }
228
memblock_free_early_nid(phys_addr_t base,phys_addr_t size,int nid)229 static inline void __init memblock_free_early_nid(
230 phys_addr_t base, phys_addr_t size, int nid)
231 {
232 __memblock_free_early(base, size);
233 }
234
memblock_free_late(phys_addr_t base,phys_addr_t size)235 static inline void __init memblock_free_late(
236 phys_addr_t base, phys_addr_t size)
237 {
238 __memblock_free_late(base, size);
239 }
240
241 #else
242
243 #define BOOTMEM_ALLOC_ACCESSIBLE 0
244
245
246 /* Fall back to all the existing bootmem APIs */
memblock_virt_alloc(phys_addr_t size,phys_addr_t align)247 static inline void * __init memblock_virt_alloc(
248 phys_addr_t size, phys_addr_t align)
249 {
250 if (!align)
251 align = SMP_CACHE_BYTES;
252 return __alloc_bootmem(size, align, BOOTMEM_LOW_LIMIT);
253 }
254
memblock_virt_alloc_nopanic(phys_addr_t size,phys_addr_t align)255 static inline void * __init memblock_virt_alloc_nopanic(
256 phys_addr_t size, phys_addr_t align)
257 {
258 if (!align)
259 align = SMP_CACHE_BYTES;
260 return __alloc_bootmem_nopanic(size, align, BOOTMEM_LOW_LIMIT);
261 }
262
memblock_virt_alloc_low(phys_addr_t size,phys_addr_t align)263 static inline void * __init memblock_virt_alloc_low(
264 phys_addr_t size, phys_addr_t align)
265 {
266 if (!align)
267 align = SMP_CACHE_BYTES;
268 return __alloc_bootmem_low(size, align, 0);
269 }
270
memblock_virt_alloc_low_nopanic(phys_addr_t size,phys_addr_t align)271 static inline void * __init memblock_virt_alloc_low_nopanic(
272 phys_addr_t size, phys_addr_t align)
273 {
274 if (!align)
275 align = SMP_CACHE_BYTES;
276 return __alloc_bootmem_low_nopanic(size, align, 0);
277 }
278
memblock_virt_alloc_from_nopanic(phys_addr_t size,phys_addr_t align,phys_addr_t min_addr)279 static inline void * __init memblock_virt_alloc_from_nopanic(
280 phys_addr_t size, phys_addr_t align, phys_addr_t min_addr)
281 {
282 return __alloc_bootmem_nopanic(size, align, min_addr);
283 }
284
memblock_virt_alloc_node(phys_addr_t size,int nid)285 static inline void * __init memblock_virt_alloc_node(
286 phys_addr_t size, int nid)
287 {
288 return __alloc_bootmem_node(NODE_DATA(nid), size, SMP_CACHE_BYTES,
289 BOOTMEM_LOW_LIMIT);
290 }
291
memblock_virt_alloc_node_nopanic(phys_addr_t size,int nid)292 static inline void * __init memblock_virt_alloc_node_nopanic(
293 phys_addr_t size, int nid)
294 {
295 return __alloc_bootmem_node_nopanic(NODE_DATA(nid), size,
296 SMP_CACHE_BYTES,
297 BOOTMEM_LOW_LIMIT);
298 }
299
memblock_virt_alloc_try_nid(phys_addr_t size,phys_addr_t align,phys_addr_t min_addr,phys_addr_t max_addr,int nid)300 static inline void * __init memblock_virt_alloc_try_nid(phys_addr_t size,
301 phys_addr_t align, phys_addr_t min_addr, phys_addr_t max_addr, int nid)
302 {
303 return __alloc_bootmem_node_high(NODE_DATA(nid), size, align,
304 min_addr);
305 }
306
memblock_virt_alloc_try_nid_nopanic(phys_addr_t size,phys_addr_t align,phys_addr_t min_addr,phys_addr_t max_addr,int nid)307 static inline void * __init memblock_virt_alloc_try_nid_nopanic(
308 phys_addr_t size, phys_addr_t align,
309 phys_addr_t min_addr, phys_addr_t max_addr, int nid)
310 {
311 return ___alloc_bootmem_node_nopanic(NODE_DATA(nid), size, align,
312 min_addr, max_addr);
313 }
314
memblock_free_early(phys_addr_t base,phys_addr_t size)315 static inline void __init memblock_free_early(
316 phys_addr_t base, phys_addr_t size)
317 {
318 free_bootmem(base, size);
319 }
320
memblock_free_early_nid(phys_addr_t base,phys_addr_t size,int nid)321 static inline void __init memblock_free_early_nid(
322 phys_addr_t base, phys_addr_t size, int nid)
323 {
324 free_bootmem_node(NODE_DATA(nid), base, size);
325 }
326
memblock_free_late(phys_addr_t base,phys_addr_t size)327 static inline void __init memblock_free_late(
328 phys_addr_t base, phys_addr_t size)
329 {
330 free_bootmem_late(base, size);
331 }
332 #endif /* defined(CONFIG_HAVE_MEMBLOCK) && defined(CONFIG_NO_BOOTMEM) */
333
334 #ifdef CONFIG_HAVE_ARCH_ALLOC_REMAP
335 extern void *alloc_remap(int nid, unsigned long size);
336 #else
alloc_remap(int nid,unsigned long size)337 static inline void *alloc_remap(int nid, unsigned long size)
338 {
339 return NULL;
340 }
341 #endif /* CONFIG_HAVE_ARCH_ALLOC_REMAP */
342
343 extern void *alloc_large_system_hash(const char *tablename,
344 unsigned long bucketsize,
345 unsigned long numentries,
346 int scale,
347 int flags,
348 unsigned int *_hash_shift,
349 unsigned int *_hash_mask,
350 unsigned long low_limit,
351 unsigned long high_limit);
352
353 #define HASH_EARLY 0x00000001 /* Allocating during early boot? */
354 #define HASH_SMALL 0x00000002 /* sub-page allocation allowed, min
355 * shift passed via *_hash_shift */
356
357 /* Only NUMA needs hash distribution. 64bit NUMA architectures have
358 * sufficient vmalloc space.
359 */
360 #ifdef CONFIG_NUMA
361 #define HASHDIST_DEFAULT IS_ENABLED(CONFIG_64BIT)
362 extern int hashdist; /* Distribute hashes across NUMA nodes? */
363 #else
364 #define hashdist (0)
365 #endif
366
367
368 #endif /* _LINUX_BOOTMEM_H */
369