1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * Discontiguous memory support, Kanoj Sarcar, SGI, Nov 1999
4 */
5 #ifndef _LINUX_BOOTMEM_H
6 #define _LINUX_BOOTMEM_H
7
8 #include <linux/mmzone.h>
9 #include <linux/mm_types.h>
10 #include <asm/dma.h>
11 #include <asm/processor.h>
12
13 /*
14 * simple boot-time physical memory area allocator.
15 */
16
17 extern unsigned long max_low_pfn;
18 extern unsigned long min_low_pfn;
19
20 /*
21 * highest page
22 */
23 extern unsigned long max_pfn;
24 /*
25 * highest possible page
26 */
27 extern unsigned long long max_possible_pfn;
28
29 #ifndef CONFIG_NO_BOOTMEM
30 /*
31 * node_bootmem_map is a map pointer - the bits represent all physical
32 * memory pages (including holes) on the node.
33 */
34 typedef struct bootmem_data {
35 unsigned long node_min_pfn;
36 unsigned long node_low_pfn;
37 void *node_bootmem_map;
38 unsigned long last_end_off;
39 unsigned long hint_idx;
40 struct list_head list;
41 } bootmem_data_t;
42
43 extern bootmem_data_t bootmem_node_data[];
44 #endif
45
46 extern unsigned long bootmem_bootmap_pages(unsigned long);
47
48 extern unsigned long init_bootmem_node(pg_data_t *pgdat,
49 unsigned long freepfn,
50 unsigned long startpfn,
51 unsigned long endpfn);
52 extern unsigned long init_bootmem(unsigned long addr, unsigned long memend);
53
54 extern unsigned long free_all_bootmem(void);
55 extern void reset_node_managed_pages(pg_data_t *pgdat);
56 extern void reset_all_zones_managed_pages(void);
57
58 extern void free_bootmem_node(pg_data_t *pgdat,
59 unsigned long addr,
60 unsigned long size);
61 extern void free_bootmem(unsigned long physaddr, unsigned long size);
62 extern void free_bootmem_late(unsigned long physaddr, unsigned long size);
63
64 /*
65 * Flags for reserve_bootmem (also if CONFIG_HAVE_ARCH_BOOTMEM_NODE,
66 * the architecture-specific code should honor this).
67 *
68 * If flags is BOOTMEM_DEFAULT, then the return value is always 0 (success).
69 * If flags contains BOOTMEM_EXCLUSIVE, then -EBUSY is returned if the memory
70 * already was reserved.
71 */
72 #define BOOTMEM_DEFAULT 0
73 #define BOOTMEM_EXCLUSIVE (1<<0)
74
75 extern int reserve_bootmem(unsigned long addr,
76 unsigned long size,
77 int flags);
78 extern int reserve_bootmem_node(pg_data_t *pgdat,
79 unsigned long physaddr,
80 unsigned long size,
81 int flags);
82
83 extern void *__alloc_bootmem(unsigned long size,
84 unsigned long align,
85 unsigned long goal);
86 extern void *__alloc_bootmem_nopanic(unsigned long size,
87 unsigned long align,
88 unsigned long goal) __malloc;
89 extern void *__alloc_bootmem_node(pg_data_t *pgdat,
90 unsigned long size,
91 unsigned long align,
92 unsigned long goal) __malloc;
93 void *__alloc_bootmem_node_high(pg_data_t *pgdat,
94 unsigned long size,
95 unsigned long align,
96 unsigned long goal) __malloc;
97 extern void *__alloc_bootmem_node_nopanic(pg_data_t *pgdat,
98 unsigned long size,
99 unsigned long align,
100 unsigned long goal) __malloc;
101 void *___alloc_bootmem_node_nopanic(pg_data_t *pgdat,
102 unsigned long size,
103 unsigned long align,
104 unsigned long goal,
105 unsigned long limit) __malloc;
106 extern void *__alloc_bootmem_low(unsigned long size,
107 unsigned long align,
108 unsigned long goal) __malloc;
109 void *__alloc_bootmem_low_nopanic(unsigned long size,
110 unsigned long align,
111 unsigned long goal) __malloc;
112 extern void *__alloc_bootmem_low_node(pg_data_t *pgdat,
113 unsigned long size,
114 unsigned long align,
115 unsigned long goal) __malloc;
116
117 #ifdef CONFIG_NO_BOOTMEM
118 /* We are using top down, so it is safe to use 0 here */
119 #define BOOTMEM_LOW_LIMIT 0
120 #else
121 #define BOOTMEM_LOW_LIMIT __pa(MAX_DMA_ADDRESS)
122 #endif
123
124 #ifndef ARCH_LOW_ADDRESS_LIMIT
125 #define ARCH_LOW_ADDRESS_LIMIT 0xffffffffUL
126 #endif
127
128 #define alloc_bootmem(x) \
129 __alloc_bootmem(x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
130 #define alloc_bootmem_align(x, align) \
131 __alloc_bootmem(x, align, BOOTMEM_LOW_LIMIT)
132 #define alloc_bootmem_nopanic(x) \
133 __alloc_bootmem_nopanic(x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
134 #define alloc_bootmem_pages(x) \
135 __alloc_bootmem(x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
136 #define alloc_bootmem_pages_nopanic(x) \
137 __alloc_bootmem_nopanic(x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
138 #define alloc_bootmem_node(pgdat, x) \
139 __alloc_bootmem_node(pgdat, x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
140 #define alloc_bootmem_node_nopanic(pgdat, x) \
141 __alloc_bootmem_node_nopanic(pgdat, x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
142 #define alloc_bootmem_pages_node(pgdat, x) \
143 __alloc_bootmem_node(pgdat, x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
144 #define alloc_bootmem_pages_node_nopanic(pgdat, x) \
145 __alloc_bootmem_node_nopanic(pgdat, x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
146
147 #define alloc_bootmem_low(x) \
148 __alloc_bootmem_low(x, SMP_CACHE_BYTES, 0)
149 #define alloc_bootmem_low_pages_nopanic(x) \
150 __alloc_bootmem_low_nopanic(x, PAGE_SIZE, 0)
151 #define alloc_bootmem_low_pages(x) \
152 __alloc_bootmem_low(x, PAGE_SIZE, 0)
153 #define alloc_bootmem_low_pages_node(pgdat, x) \
154 __alloc_bootmem_low_node(pgdat, x, PAGE_SIZE, 0)
155
156
157 #if defined(CONFIG_HAVE_MEMBLOCK) && defined(CONFIG_NO_BOOTMEM)
158
159 /* FIXME: use MEMBLOCK_ALLOC_* variants here */
160 #define BOOTMEM_ALLOC_ACCESSIBLE 0
161 #define BOOTMEM_ALLOC_ANYWHERE (~(phys_addr_t)0)
162
163 /* FIXME: Move to memblock.h at a point where we remove nobootmem.c */
164 void *memblock_virt_alloc_try_nid_nopanic(phys_addr_t size,
165 phys_addr_t align, phys_addr_t min_addr,
166 phys_addr_t max_addr, int nid);
167 void *memblock_virt_alloc_try_nid(phys_addr_t size, phys_addr_t align,
168 phys_addr_t min_addr, phys_addr_t max_addr, int nid);
169 void __memblock_free_early(phys_addr_t base, phys_addr_t size);
170 void __memblock_free_late(phys_addr_t base, phys_addr_t size);
171
memblock_virt_alloc(phys_addr_t size,phys_addr_t align)172 static inline void * __init memblock_virt_alloc(
173 phys_addr_t size, phys_addr_t align)
174 {
175 return memblock_virt_alloc_try_nid(size, align, BOOTMEM_LOW_LIMIT,
176 BOOTMEM_ALLOC_ACCESSIBLE,
177 NUMA_NO_NODE);
178 }
179
memblock_virt_alloc_nopanic(phys_addr_t size,phys_addr_t align)180 static inline void * __init memblock_virt_alloc_nopanic(
181 phys_addr_t size, phys_addr_t align)
182 {
183 return memblock_virt_alloc_try_nid_nopanic(size, align,
184 BOOTMEM_LOW_LIMIT,
185 BOOTMEM_ALLOC_ACCESSIBLE,
186 NUMA_NO_NODE);
187 }
188
memblock_virt_alloc_low(phys_addr_t size,phys_addr_t align)189 static inline void * __init memblock_virt_alloc_low(
190 phys_addr_t size, phys_addr_t align)
191 {
192 return memblock_virt_alloc_try_nid(size, align,
193 BOOTMEM_LOW_LIMIT,
194 ARCH_LOW_ADDRESS_LIMIT,
195 NUMA_NO_NODE);
196 }
memblock_virt_alloc_low_nopanic(phys_addr_t size,phys_addr_t align)197 static inline void * __init memblock_virt_alloc_low_nopanic(
198 phys_addr_t size, phys_addr_t align)
199 {
200 return memblock_virt_alloc_try_nid_nopanic(size, align,
201 BOOTMEM_LOW_LIMIT,
202 ARCH_LOW_ADDRESS_LIMIT,
203 NUMA_NO_NODE);
204 }
205
memblock_virt_alloc_from_nopanic(phys_addr_t size,phys_addr_t align,phys_addr_t min_addr)206 static inline void * __init memblock_virt_alloc_from_nopanic(
207 phys_addr_t size, phys_addr_t align, phys_addr_t min_addr)
208 {
209 return memblock_virt_alloc_try_nid_nopanic(size, align, min_addr,
210 BOOTMEM_ALLOC_ACCESSIBLE,
211 NUMA_NO_NODE);
212 }
213
memblock_virt_alloc_node(phys_addr_t size,int nid)214 static inline void * __init memblock_virt_alloc_node(
215 phys_addr_t size, int nid)
216 {
217 return memblock_virt_alloc_try_nid(size, 0, BOOTMEM_LOW_LIMIT,
218 BOOTMEM_ALLOC_ACCESSIBLE, nid);
219 }
220
memblock_virt_alloc_node_nopanic(phys_addr_t size,int nid)221 static inline void * __init memblock_virt_alloc_node_nopanic(
222 phys_addr_t size, int nid)
223 {
224 return memblock_virt_alloc_try_nid_nopanic(size, 0, BOOTMEM_LOW_LIMIT,
225 BOOTMEM_ALLOC_ACCESSIBLE,
226 nid);
227 }
228
memblock_free_early(phys_addr_t base,phys_addr_t size)229 static inline void __init memblock_free_early(
230 phys_addr_t base, phys_addr_t size)
231 {
232 __memblock_free_early(base, size);
233 }
234
memblock_free_early_nid(phys_addr_t base,phys_addr_t size,int nid)235 static inline void __init memblock_free_early_nid(
236 phys_addr_t base, phys_addr_t size, int nid)
237 {
238 __memblock_free_early(base, size);
239 }
240
memblock_free_late(phys_addr_t base,phys_addr_t size)241 static inline void __init memblock_free_late(
242 phys_addr_t base, phys_addr_t size)
243 {
244 __memblock_free_late(base, size);
245 }
246
247 #else
248
249 #define BOOTMEM_ALLOC_ACCESSIBLE 0
250
251
252 /* Fall back to all the existing bootmem APIs */
memblock_virt_alloc(phys_addr_t size,phys_addr_t align)253 static inline void * __init memblock_virt_alloc(
254 phys_addr_t size, phys_addr_t align)
255 {
256 if (!align)
257 align = SMP_CACHE_BYTES;
258 return __alloc_bootmem(size, align, BOOTMEM_LOW_LIMIT);
259 }
260
memblock_virt_alloc_nopanic(phys_addr_t size,phys_addr_t align)261 static inline void * __init memblock_virt_alloc_nopanic(
262 phys_addr_t size, phys_addr_t align)
263 {
264 if (!align)
265 align = SMP_CACHE_BYTES;
266 return __alloc_bootmem_nopanic(size, align, BOOTMEM_LOW_LIMIT);
267 }
268
memblock_virt_alloc_low(phys_addr_t size,phys_addr_t align)269 static inline void * __init memblock_virt_alloc_low(
270 phys_addr_t size, phys_addr_t align)
271 {
272 if (!align)
273 align = SMP_CACHE_BYTES;
274 return __alloc_bootmem_low(size, align, 0);
275 }
276
memblock_virt_alloc_low_nopanic(phys_addr_t size,phys_addr_t align)277 static inline void * __init memblock_virt_alloc_low_nopanic(
278 phys_addr_t size, phys_addr_t align)
279 {
280 if (!align)
281 align = SMP_CACHE_BYTES;
282 return __alloc_bootmem_low_nopanic(size, align, 0);
283 }
284
memblock_virt_alloc_from_nopanic(phys_addr_t size,phys_addr_t align,phys_addr_t min_addr)285 static inline void * __init memblock_virt_alloc_from_nopanic(
286 phys_addr_t size, phys_addr_t align, phys_addr_t min_addr)
287 {
288 return __alloc_bootmem_nopanic(size, align, min_addr);
289 }
290
memblock_virt_alloc_node(phys_addr_t size,int nid)291 static inline void * __init memblock_virt_alloc_node(
292 phys_addr_t size, int nid)
293 {
294 return __alloc_bootmem_node(NODE_DATA(nid), size, SMP_CACHE_BYTES,
295 BOOTMEM_LOW_LIMIT);
296 }
297
memblock_virt_alloc_node_nopanic(phys_addr_t size,int nid)298 static inline void * __init memblock_virt_alloc_node_nopanic(
299 phys_addr_t size, int nid)
300 {
301 return __alloc_bootmem_node_nopanic(NODE_DATA(nid), size,
302 SMP_CACHE_BYTES,
303 BOOTMEM_LOW_LIMIT);
304 }
305
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)306 static inline void * __init memblock_virt_alloc_try_nid(phys_addr_t size,
307 phys_addr_t align, phys_addr_t min_addr, phys_addr_t max_addr, int nid)
308 {
309 return __alloc_bootmem_node_high(NODE_DATA(nid), size, align,
310 min_addr);
311 }
312
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)313 static inline void * __init memblock_virt_alloc_try_nid_nopanic(
314 phys_addr_t size, phys_addr_t align,
315 phys_addr_t min_addr, phys_addr_t max_addr, int nid)
316 {
317 return ___alloc_bootmem_node_nopanic(NODE_DATA(nid), size, align,
318 min_addr, max_addr);
319 }
320
memblock_free_early(phys_addr_t base,phys_addr_t size)321 static inline void __init memblock_free_early(
322 phys_addr_t base, phys_addr_t size)
323 {
324 free_bootmem(base, size);
325 }
326
memblock_free_early_nid(phys_addr_t base,phys_addr_t size,int nid)327 static inline void __init memblock_free_early_nid(
328 phys_addr_t base, phys_addr_t size, int nid)
329 {
330 free_bootmem_node(NODE_DATA(nid), base, size);
331 }
332
memblock_free_late(phys_addr_t base,phys_addr_t size)333 static inline void __init memblock_free_late(
334 phys_addr_t base, phys_addr_t size)
335 {
336 free_bootmem_late(base, size);
337 }
338 #endif /* defined(CONFIG_HAVE_MEMBLOCK) && defined(CONFIG_NO_BOOTMEM) */
339
340 #ifdef CONFIG_HAVE_ARCH_ALLOC_REMAP
341 extern void *alloc_remap(int nid, unsigned long size);
342 #else
alloc_remap(int nid,unsigned long size)343 static inline void *alloc_remap(int nid, unsigned long size)
344 {
345 return NULL;
346 }
347 #endif /* CONFIG_HAVE_ARCH_ALLOC_REMAP */
348
349 extern void *alloc_large_system_hash(const char *tablename,
350 unsigned long bucketsize,
351 unsigned long numentries,
352 int scale,
353 int flags,
354 unsigned int *_hash_shift,
355 unsigned int *_hash_mask,
356 unsigned long low_limit,
357 unsigned long high_limit);
358
359 #define HASH_EARLY 0x00000001 /* Allocating during early boot? */
360 #define HASH_SMALL 0x00000002 /* sub-page allocation allowed, min
361 * shift passed via *_hash_shift */
362 #define HASH_ZERO 0x00000004 /* Zero allocated hash table */
363
364 /* Only NUMA needs hash distribution. 64bit NUMA architectures have
365 * sufficient vmalloc space.
366 */
367 #ifdef CONFIG_NUMA
368 #define HASHDIST_DEFAULT IS_ENABLED(CONFIG_64BIT)
369 extern int hashdist; /* Distribute hashes across NUMA nodes? */
370 #else
371 #define hashdist (0)
372 #endif
373
374
375 #endif /* _LINUX_BOOTMEM_H */
376