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_nopanic(phys_addr_t size,
165 phys_addr_t align, phys_addr_t min_addr,
166 phys_addr_t max_addr, int nid);
167void *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);
169void __memblock_free_early(phys_addr_t base, phys_addr_t size);
170void __memblock_free_late(phys_addr_t base, phys_addr_t size);
171
172static 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
180static 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
189static 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}
197static 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
206static 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
214static 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
221static 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
229static inline void __init memblock_free_early(
230 phys_addr_t base, phys_addr_t size)
231{
232 __memblock_free_early(base, size);
233}
234
235static 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
241static 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 */
253static 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
261static 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
269static 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
277static 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
285static 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
291static 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
298static 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
306static 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
313static 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
321static inline void __init memblock_free_early(
322 phys_addr_t base, phys_addr_t size)
323{
324 free_bootmem(base, size);
325}
326
327static 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
333static 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
341extern void *alloc_remap(int nid, unsigned long size);
342#else
343static inline void *alloc_remap(int nid, unsigned long size)
344{
345 return NULL;
346}
347#endif /* CONFIG_HAVE_ARCH_ALLOC_REMAP */
348
349extern 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)
369extern int hashdist; /* Distribute hashes across NUMA nodes? */
370#else
371#define hashdist (0)
372#endif
373
374
375#endif /* _LINUX_BOOTMEM_H */