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 * struct bootmem_data - per-node information used by the bootmem allocator
32 * @node_min_pfn: the starting physical address of the node's memory
33 * @node_low_pfn: the end physical address of the directly addressable memory
34 * @node_bootmem_map: is a bitmap pointer - the bits represent all physical
35 * memory pages (including holes) on the node.
36 * @last_end_off: the offset within the page of the end of the last allocation;
37 * if 0, the page used is full
38 * @hint_idx: the PFN of the page used with the last allocation;
39 * together with using this with the @last_end_offset field,
40 * a test can be made to see if allocations can be merged
41 * with the page used for the last allocation rather than
42 * using up a full new page.
43 * @list: list entry in the linked list ordered by the memory addresses
44 */
45typedef struct bootmem_data {
46 unsigned long node_min_pfn;
47 unsigned long node_low_pfn;
48 void *node_bootmem_map;
49 unsigned long last_end_off;
50 unsigned long hint_idx;
51 struct list_head list;
52} bootmem_data_t;
53
54extern bootmem_data_t bootmem_node_data[];
55#endif
56
57extern unsigned long bootmem_bootmap_pages(unsigned long);
58
59extern unsigned long init_bootmem_node(pg_data_t *pgdat,
60 unsigned long freepfn,
61 unsigned long startpfn,
62 unsigned long endpfn);
63extern unsigned long init_bootmem(unsigned long addr, unsigned long memend);
64
65extern unsigned long free_all_bootmem(void);
66extern void reset_node_managed_pages(pg_data_t *pgdat);
67extern void reset_all_zones_managed_pages(void);
68
69extern void free_bootmem_node(pg_data_t *pgdat,
70 unsigned long addr,
71 unsigned long size);
72extern void free_bootmem(unsigned long physaddr, unsigned long size);
73extern void free_bootmem_late(unsigned long physaddr, unsigned long size);
74
75/*
76 * Flags for reserve_bootmem (also if CONFIG_HAVE_ARCH_BOOTMEM_NODE,
77 * the architecture-specific code should honor this).
78 *
79 * If flags is BOOTMEM_DEFAULT, then the return value is always 0 (success).
80 * If flags contains BOOTMEM_EXCLUSIVE, then -EBUSY is returned if the memory
81 * already was reserved.
82 */
83#define BOOTMEM_DEFAULT 0
84#define BOOTMEM_EXCLUSIVE (1<<0)
85
86extern int reserve_bootmem(unsigned long addr,
87 unsigned long size,
88 int flags);
89extern int reserve_bootmem_node(pg_data_t *pgdat,
90 unsigned long physaddr,
91 unsigned long size,
92 int flags);
93
94extern void *__alloc_bootmem(unsigned long size,
95 unsigned long align,
96 unsigned long goal);
97extern void *__alloc_bootmem_nopanic(unsigned long size,
98 unsigned long align,
99 unsigned long goal) __malloc;
100extern void *__alloc_bootmem_node(pg_data_t *pgdat,
101 unsigned long size,
102 unsigned long align,
103 unsigned long goal) __malloc;
104void *__alloc_bootmem_node_high(pg_data_t *pgdat,
105 unsigned long size,
106 unsigned long align,
107 unsigned long goal) __malloc;
108extern void *__alloc_bootmem_node_nopanic(pg_data_t *pgdat,
109 unsigned long size,
110 unsigned long align,
111 unsigned long goal) __malloc;
112void *___alloc_bootmem_node_nopanic(pg_data_t *pgdat,
113 unsigned long size,
114 unsigned long align,
115 unsigned long goal,
116 unsigned long limit) __malloc;
117extern void *__alloc_bootmem_low(unsigned long size,
118 unsigned long align,
119 unsigned long goal) __malloc;
120void *__alloc_bootmem_low_nopanic(unsigned long size,
121 unsigned long align,
122 unsigned long goal) __malloc;
123extern void *__alloc_bootmem_low_node(pg_data_t *pgdat,
124 unsigned long size,
125 unsigned long align,
126 unsigned long goal) __malloc;
127
128#ifdef CONFIG_NO_BOOTMEM
129/* We are using top down, so it is safe to use 0 here */
130#define BOOTMEM_LOW_LIMIT 0
131#else
132#define BOOTMEM_LOW_LIMIT __pa(MAX_DMA_ADDRESS)
133#endif
134
135#ifndef ARCH_LOW_ADDRESS_LIMIT
136#define ARCH_LOW_ADDRESS_LIMIT 0xffffffffUL
137#endif
138
139#define alloc_bootmem(x) \
140 __alloc_bootmem(x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
141#define alloc_bootmem_align(x, align) \
142 __alloc_bootmem(x, align, BOOTMEM_LOW_LIMIT)
143#define alloc_bootmem_nopanic(x) \
144 __alloc_bootmem_nopanic(x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
145#define alloc_bootmem_pages(x) \
146 __alloc_bootmem(x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
147#define alloc_bootmem_pages_nopanic(x) \
148 __alloc_bootmem_nopanic(x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
149#define alloc_bootmem_node(pgdat, x) \
150 __alloc_bootmem_node(pgdat, x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
151#define alloc_bootmem_node_nopanic(pgdat, x) \
152 __alloc_bootmem_node_nopanic(pgdat, x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
153#define alloc_bootmem_pages_node(pgdat, x) \
154 __alloc_bootmem_node(pgdat, x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
155#define alloc_bootmem_pages_node_nopanic(pgdat, x) \
156 __alloc_bootmem_node_nopanic(pgdat, x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
157
158#define alloc_bootmem_low(x) \
159 __alloc_bootmem_low(x, SMP_CACHE_BYTES, 0)
160#define alloc_bootmem_low_pages_nopanic(x) \
161 __alloc_bootmem_low_nopanic(x, PAGE_SIZE, 0)
162#define alloc_bootmem_low_pages(x) \
163 __alloc_bootmem_low(x, PAGE_SIZE, 0)
164#define alloc_bootmem_low_pages_node(pgdat, x) \
165 __alloc_bootmem_low_node(pgdat, x, PAGE_SIZE, 0)
166
167
168#if defined(CONFIG_HAVE_MEMBLOCK) && defined(CONFIG_NO_BOOTMEM)
169
170/* FIXME: use MEMBLOCK_ALLOC_* variants here */
171#define BOOTMEM_ALLOC_ACCESSIBLE 0
172#define BOOTMEM_ALLOC_ANYWHERE (~(phys_addr_t)0)
173
174/* FIXME: Move to memblock.h at a point where we remove nobootmem.c */
175void *memblock_virt_alloc_try_nid_raw(phys_addr_t size, phys_addr_t align,
176 phys_addr_t min_addr,
177 phys_addr_t max_addr, int nid);
178void *memblock_virt_alloc_try_nid_nopanic(phys_addr_t size,
179 phys_addr_t align, phys_addr_t min_addr,
180 phys_addr_t max_addr, int nid);
181void *memblock_virt_alloc_try_nid(phys_addr_t size, phys_addr_t align,
182 phys_addr_t min_addr, phys_addr_t max_addr, int nid);
183void __memblock_free_early(phys_addr_t base, phys_addr_t size);
184void __memblock_free_late(phys_addr_t base, phys_addr_t size);
185
186static inline void * __init memblock_virt_alloc(
187 phys_addr_t size, phys_addr_t align)
188{
189 return memblock_virt_alloc_try_nid(size, align, BOOTMEM_LOW_LIMIT,
190 BOOTMEM_ALLOC_ACCESSIBLE,
191 NUMA_NO_NODE);
192}
193
194static inline void * __init memblock_virt_alloc_raw(
195 phys_addr_t size, phys_addr_t align)
196{
197 return memblock_virt_alloc_try_nid_raw(size, align, BOOTMEM_LOW_LIMIT,
198 BOOTMEM_ALLOC_ACCESSIBLE,
199 NUMA_NO_NODE);
200}
201
202static inline void * __init memblock_virt_alloc_nopanic(
203 phys_addr_t size, phys_addr_t align)
204{
205 return memblock_virt_alloc_try_nid_nopanic(size, align,
206 BOOTMEM_LOW_LIMIT,
207 BOOTMEM_ALLOC_ACCESSIBLE,
208 NUMA_NO_NODE);
209}
210
211static inline void * __init memblock_virt_alloc_low(
212 phys_addr_t size, phys_addr_t align)
213{
214 return memblock_virt_alloc_try_nid(size, align,
215 BOOTMEM_LOW_LIMIT,
216 ARCH_LOW_ADDRESS_LIMIT,
217 NUMA_NO_NODE);
218}
219static inline void * __init memblock_virt_alloc_low_nopanic(
220 phys_addr_t size, phys_addr_t align)
221{
222 return memblock_virt_alloc_try_nid_nopanic(size, align,
223 BOOTMEM_LOW_LIMIT,
224 ARCH_LOW_ADDRESS_LIMIT,
225 NUMA_NO_NODE);
226}
227
228static inline void * __init memblock_virt_alloc_from_nopanic(
229 phys_addr_t size, phys_addr_t align, phys_addr_t min_addr)
230{
231 return memblock_virt_alloc_try_nid_nopanic(size, align, min_addr,
232 BOOTMEM_ALLOC_ACCESSIBLE,
233 NUMA_NO_NODE);
234}
235
236static inline void * __init memblock_virt_alloc_node(
237 phys_addr_t size, int nid)
238{
239 return memblock_virt_alloc_try_nid(size, 0, BOOTMEM_LOW_LIMIT,
240 BOOTMEM_ALLOC_ACCESSIBLE, nid);
241}
242
243static inline void * __init memblock_virt_alloc_node_nopanic(
244 phys_addr_t size, int nid)
245{
246 return memblock_virt_alloc_try_nid_nopanic(size, 0, BOOTMEM_LOW_LIMIT,
247 BOOTMEM_ALLOC_ACCESSIBLE,
248 nid);
249}
250
251static inline void __init memblock_free_early(
252 phys_addr_t base, phys_addr_t size)
253{
254 __memblock_free_early(base, size);
255}
256
257static inline void __init memblock_free_early_nid(
258 phys_addr_t base, phys_addr_t size, int nid)
259{
260 __memblock_free_early(base, size);
261}
262
263static inline void __init memblock_free_late(
264 phys_addr_t base, phys_addr_t size)
265{
266 __memblock_free_late(base, size);
267}
268
269#else
270
271#define BOOTMEM_ALLOC_ACCESSIBLE 0
272
273
274/* Fall back to all the existing bootmem APIs */
275static inline void * __init memblock_virt_alloc(
276 phys_addr_t size, phys_addr_t align)
277{
278 if (!align)
279 align = SMP_CACHE_BYTES;
280 return __alloc_bootmem(size, align, BOOTMEM_LOW_LIMIT);
281}
282
283static inline void * __init memblock_virt_alloc_raw(
284 phys_addr_t size, phys_addr_t align)
285{
286 if (!align)
287 align = SMP_CACHE_BYTES;
288 return __alloc_bootmem_nopanic(size, align, BOOTMEM_LOW_LIMIT);
289}
290
291static inline void * __init memblock_virt_alloc_nopanic(
292 phys_addr_t size, phys_addr_t align)
293{
294 if (!align)
295 align = SMP_CACHE_BYTES;
296 return __alloc_bootmem_nopanic(size, align, BOOTMEM_LOW_LIMIT);
297}
298
299static inline void * __init memblock_virt_alloc_low(
300 phys_addr_t size, phys_addr_t align)
301{
302 if (!align)
303 align = SMP_CACHE_BYTES;
304 return __alloc_bootmem_low(size, align, 0);
305}
306
307static inline void * __init memblock_virt_alloc_low_nopanic(
308 phys_addr_t size, phys_addr_t align)
309{
310 if (!align)
311 align = SMP_CACHE_BYTES;
312 return __alloc_bootmem_low_nopanic(size, align, 0);
313}
314
315static inline void * __init memblock_virt_alloc_from_nopanic(
316 phys_addr_t size, phys_addr_t align, phys_addr_t min_addr)
317{
318 return __alloc_bootmem_nopanic(size, align, min_addr);
319}
320
321static inline void * __init memblock_virt_alloc_node(
322 phys_addr_t size, int nid)
323{
324 return __alloc_bootmem_node(NODE_DATA(nid), size, SMP_CACHE_BYTES,
325 BOOTMEM_LOW_LIMIT);
326}
327
328static inline void * __init memblock_virt_alloc_node_nopanic(
329 phys_addr_t size, int nid)
330{
331 return __alloc_bootmem_node_nopanic(NODE_DATA(nid), size,
332 SMP_CACHE_BYTES,
333 BOOTMEM_LOW_LIMIT);
334}
335
336static inline void * __init memblock_virt_alloc_try_nid(phys_addr_t size,
337 phys_addr_t align, phys_addr_t min_addr, phys_addr_t max_addr, int nid)
338{
339 return __alloc_bootmem_node_high(NODE_DATA(nid), size, align,
340 min_addr);
341}
342
343static inline void * __init memblock_virt_alloc_try_nid_raw(
344 phys_addr_t size, phys_addr_t align,
345 phys_addr_t min_addr, phys_addr_t max_addr, int nid)
346{
347 return ___alloc_bootmem_node_nopanic(NODE_DATA(nid), size, align,
348 min_addr, max_addr);
349}
350
351static inline void * __init memblock_virt_alloc_try_nid_nopanic(
352 phys_addr_t size, phys_addr_t align,
353 phys_addr_t min_addr, phys_addr_t max_addr, int nid)
354{
355 return ___alloc_bootmem_node_nopanic(NODE_DATA(nid), size, align,
356 min_addr, max_addr);
357}
358
359static inline void __init memblock_free_early(
360 phys_addr_t base, phys_addr_t size)
361{
362 free_bootmem(base, size);
363}
364
365static inline void __init memblock_free_early_nid(
366 phys_addr_t base, phys_addr_t size, int nid)
367{
368 free_bootmem_node(NODE_DATA(nid), base, size);
369}
370
371static inline void __init memblock_free_late(
372 phys_addr_t base, phys_addr_t size)
373{
374 free_bootmem_late(base, size);
375}
376#endif /* defined(CONFIG_HAVE_MEMBLOCK) && defined(CONFIG_NO_BOOTMEM) */
377
378extern void *alloc_large_system_hash(const char *tablename,
379 unsigned long bucketsize,
380 unsigned long numentries,
381 int scale,
382 int flags,
383 unsigned int *_hash_shift,
384 unsigned int *_hash_mask,
385 unsigned long low_limit,
386 unsigned long high_limit);
387
388#define HASH_EARLY 0x00000001 /* Allocating during early boot? */
389#define HASH_SMALL 0x00000002 /* sub-page allocation allowed, min
390 * shift passed via *_hash_shift */
391#define HASH_ZERO 0x00000004 /* Zero allocated hash table */
392
393/* Only NUMA needs hash distribution. 64bit NUMA architectures have
394 * sufficient vmalloc space.
395 */
396#ifdef CONFIG_NUMA
397#define HASHDIST_DEFAULT IS_ENABLED(CONFIG_64BIT)
398extern int hashdist; /* Distribute hashes across NUMA nodes? */
399#else
400#define hashdist (0)
401#endif
402
403
404#endif /* _LINUX_BOOTMEM_H */