Linux kernel mirror (for testing)
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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
17extern unsigned long max_low_pfn;
18extern unsigned long min_low_pfn;
19
20/*
21 * highest page
22 */
23extern unsigned long max_pfn;
24/*
25 * highest possible page
26 */
27extern 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 */
34typedef 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
43extern bootmem_data_t bootmem_node_data[];
44#endif
45
46extern unsigned long bootmem_bootmap_pages(unsigned long);
47
48extern unsigned long init_bootmem_node(pg_data_t *pgdat,
49 unsigned long freepfn,
50 unsigned long startpfn,
51 unsigned long endpfn);
52extern unsigned long init_bootmem(unsigned long addr, unsigned long memend);
53
54extern unsigned long free_all_bootmem(void);
55extern void reset_node_managed_pages(pg_data_t *pgdat);
56extern void reset_all_zones_managed_pages(void);
57
58extern void free_bootmem_node(pg_data_t *pgdat,
59 unsigned long addr,
60 unsigned long size);
61extern void free_bootmem(unsigned long physaddr, unsigned long size);
62extern 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
75extern int reserve_bootmem(unsigned long addr,
76 unsigned long size,
77 int flags);
78extern int reserve_bootmem_node(pg_data_t *pgdat,
79 unsigned long physaddr,
80 unsigned long size,
81 int flags);
82
83extern void *__alloc_bootmem(unsigned long size,
84 unsigned long align,
85 unsigned long goal);
86extern void *__alloc_bootmem_nopanic(unsigned long size,
87 unsigned long align,
88 unsigned long goal) __malloc;
89extern void *__alloc_bootmem_node(pg_data_t *pgdat,
90 unsigned long size,
91 unsigned long align,
92 unsigned long goal) __malloc;
93void *__alloc_bootmem_node_high(pg_data_t *pgdat,
94 unsigned long size,
95 unsigned long align,
96 unsigned long goal) __malloc;
97extern void *__alloc_bootmem_node_nopanic(pg_data_t *pgdat,
98 unsigned long size,
99 unsigned long align,
100 unsigned long goal) __malloc;
101void *___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;
106extern void *__alloc_bootmem_low(unsigned long size,
107 unsigned long align,
108 unsigned long goal) __malloc;
109void *__alloc_bootmem_low_nopanic(unsigned long size,
110 unsigned long align,
111 unsigned long goal) __malloc;
112extern 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 */
164void *memblock_virt_alloc_try_nid_raw(phys_addr_t size, phys_addr_t align,
165 phys_addr_t min_addr,
166 phys_addr_t max_addr, int nid);
167void *memblock_virt_alloc_try_nid_nopanic(phys_addr_t size,
168 phys_addr_t align, phys_addr_t min_addr,
169 phys_addr_t max_addr, int nid);
170void *memblock_virt_alloc_try_nid(phys_addr_t size, phys_addr_t align,
171 phys_addr_t min_addr, phys_addr_t max_addr, int nid);
172void __memblock_free_early(phys_addr_t base, phys_addr_t size);
173void __memblock_free_late(phys_addr_t base, phys_addr_t size);
174
175static inline void * __init memblock_virt_alloc(
176 phys_addr_t size, phys_addr_t align)
177{
178 return memblock_virt_alloc_try_nid(size, align, BOOTMEM_LOW_LIMIT,
179 BOOTMEM_ALLOC_ACCESSIBLE,
180 NUMA_NO_NODE);
181}
182
183static inline void * __init memblock_virt_alloc_raw(
184 phys_addr_t size, phys_addr_t align)
185{
186 return memblock_virt_alloc_try_nid_raw(size, align, BOOTMEM_LOW_LIMIT,
187 BOOTMEM_ALLOC_ACCESSIBLE,
188 NUMA_NO_NODE);
189}
190
191static inline void * __init memblock_virt_alloc_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 BOOTMEM_ALLOC_ACCESSIBLE,
197 NUMA_NO_NODE);
198}
199
200static inline void * __init memblock_virt_alloc_low(
201 phys_addr_t size, phys_addr_t align)
202{
203 return memblock_virt_alloc_try_nid(size, align,
204 BOOTMEM_LOW_LIMIT,
205 ARCH_LOW_ADDRESS_LIMIT,
206 NUMA_NO_NODE);
207}
208static inline void * __init memblock_virt_alloc_low_nopanic(
209 phys_addr_t size, phys_addr_t align)
210{
211 return memblock_virt_alloc_try_nid_nopanic(size, align,
212 BOOTMEM_LOW_LIMIT,
213 ARCH_LOW_ADDRESS_LIMIT,
214 NUMA_NO_NODE);
215}
216
217static inline void * __init memblock_virt_alloc_from_nopanic(
218 phys_addr_t size, phys_addr_t align, phys_addr_t min_addr)
219{
220 return memblock_virt_alloc_try_nid_nopanic(size, align, min_addr,
221 BOOTMEM_ALLOC_ACCESSIBLE,
222 NUMA_NO_NODE);
223}
224
225static inline void * __init memblock_virt_alloc_node(
226 phys_addr_t size, int nid)
227{
228 return memblock_virt_alloc_try_nid(size, 0, BOOTMEM_LOW_LIMIT,
229 BOOTMEM_ALLOC_ACCESSIBLE, nid);
230}
231
232static inline void * __init memblock_virt_alloc_node_nopanic(
233 phys_addr_t size, int nid)
234{
235 return memblock_virt_alloc_try_nid_nopanic(size, 0, BOOTMEM_LOW_LIMIT,
236 BOOTMEM_ALLOC_ACCESSIBLE,
237 nid);
238}
239
240static inline void __init memblock_free_early(
241 phys_addr_t base, phys_addr_t size)
242{
243 __memblock_free_early(base, size);
244}
245
246static inline void __init memblock_free_early_nid(
247 phys_addr_t base, phys_addr_t size, int nid)
248{
249 __memblock_free_early(base, size);
250}
251
252static inline void __init memblock_free_late(
253 phys_addr_t base, phys_addr_t size)
254{
255 __memblock_free_late(base, size);
256}
257
258#else
259
260#define BOOTMEM_ALLOC_ACCESSIBLE 0
261
262
263/* Fall back to all the existing bootmem APIs */
264static inline void * __init memblock_virt_alloc(
265 phys_addr_t size, phys_addr_t align)
266{
267 if (!align)
268 align = SMP_CACHE_BYTES;
269 return __alloc_bootmem(size, align, BOOTMEM_LOW_LIMIT);
270}
271
272static inline void * __init memblock_virt_alloc_raw(
273 phys_addr_t size, phys_addr_t align)
274{
275 if (!align)
276 align = SMP_CACHE_BYTES;
277 return __alloc_bootmem_nopanic(size, align, BOOTMEM_LOW_LIMIT);
278}
279
280static inline void * __init memblock_virt_alloc_nopanic(
281 phys_addr_t size, phys_addr_t align)
282{
283 if (!align)
284 align = SMP_CACHE_BYTES;
285 return __alloc_bootmem_nopanic(size, align, BOOTMEM_LOW_LIMIT);
286}
287
288static inline void * __init memblock_virt_alloc_low(
289 phys_addr_t size, phys_addr_t align)
290{
291 if (!align)
292 align = SMP_CACHE_BYTES;
293 return __alloc_bootmem_low(size, align, 0);
294}
295
296static inline void * __init memblock_virt_alloc_low_nopanic(
297 phys_addr_t size, phys_addr_t align)
298{
299 if (!align)
300 align = SMP_CACHE_BYTES;
301 return __alloc_bootmem_low_nopanic(size, align, 0);
302}
303
304static inline void * __init memblock_virt_alloc_from_nopanic(
305 phys_addr_t size, phys_addr_t align, phys_addr_t min_addr)
306{
307 return __alloc_bootmem_nopanic(size, align, min_addr);
308}
309
310static inline void * __init memblock_virt_alloc_node(
311 phys_addr_t size, int nid)
312{
313 return __alloc_bootmem_node(NODE_DATA(nid), size, SMP_CACHE_BYTES,
314 BOOTMEM_LOW_LIMIT);
315}
316
317static inline void * __init memblock_virt_alloc_node_nopanic(
318 phys_addr_t size, int nid)
319{
320 return __alloc_bootmem_node_nopanic(NODE_DATA(nid), size,
321 SMP_CACHE_BYTES,
322 BOOTMEM_LOW_LIMIT);
323}
324
325static inline void * __init memblock_virt_alloc_try_nid(phys_addr_t size,
326 phys_addr_t align, phys_addr_t min_addr, phys_addr_t max_addr, int nid)
327{
328 return __alloc_bootmem_node_high(NODE_DATA(nid), size, align,
329 min_addr);
330}
331
332static inline void * __init memblock_virt_alloc_try_nid_raw(
333 phys_addr_t size, phys_addr_t align,
334 phys_addr_t min_addr, phys_addr_t max_addr, int nid)
335{
336 return ___alloc_bootmem_node_nopanic(NODE_DATA(nid), size, align,
337 min_addr, max_addr);
338}
339
340static inline void * __init memblock_virt_alloc_try_nid_nopanic(
341 phys_addr_t size, phys_addr_t align,
342 phys_addr_t min_addr, phys_addr_t max_addr, int nid)
343{
344 return ___alloc_bootmem_node_nopanic(NODE_DATA(nid), size, align,
345 min_addr, max_addr);
346}
347
348static inline void __init memblock_free_early(
349 phys_addr_t base, phys_addr_t size)
350{
351 free_bootmem(base, size);
352}
353
354static inline void __init memblock_free_early_nid(
355 phys_addr_t base, phys_addr_t size, int nid)
356{
357 free_bootmem_node(NODE_DATA(nid), base, size);
358}
359
360static inline void __init memblock_free_late(
361 phys_addr_t base, phys_addr_t size)
362{
363 free_bootmem_late(base, size);
364}
365#endif /* defined(CONFIG_HAVE_MEMBLOCK) && defined(CONFIG_NO_BOOTMEM) */
366
367extern void *alloc_large_system_hash(const char *tablename,
368 unsigned long bucketsize,
369 unsigned long numentries,
370 int scale,
371 int flags,
372 unsigned int *_hash_shift,
373 unsigned int *_hash_mask,
374 unsigned long low_limit,
375 unsigned long high_limit);
376
377#define HASH_EARLY 0x00000001 /* Allocating during early boot? */
378#define HASH_SMALL 0x00000002 /* sub-page allocation allowed, min
379 * shift passed via *_hash_shift */
380#define HASH_ZERO 0x00000004 /* Zero allocated hash table */
381
382/* Only NUMA needs hash distribution. 64bit NUMA architectures have
383 * sufficient vmalloc space.
384 */
385#ifdef CONFIG_NUMA
386#define HASHDIST_DEFAULT IS_ENABLED(CONFIG_64BIT)
387extern int hashdist; /* Distribute hashes across NUMA nodes? */
388#else
389#define hashdist (0)
390#endif
391
392
393#endif /* _LINUX_BOOTMEM_H */