1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Discontiguous memory support, Kanoj Sarcar, SGI, Nov 1999
5 #ifndef _LINUX_BOOTMEM_H
6 #define _LINUX_BOOTMEM_H
8 #include <linux/mmzone.h>
9 #include <linux/mm_types.h>
11 #include <asm/processor.h>
14 * simple boot-time physical memory area allocator.
17 extern unsigned long max_low_pfn;
18 extern unsigned long min_low_pfn;
23 extern unsigned long max_pfn;
25 * highest possible page
27 extern unsigned long long max_possible_pfn;
29 extern unsigned long bootmem_bootmap_pages(unsigned long);
31 extern unsigned long init_bootmem_node(pg_data_t *pgdat,
32 unsigned long freepfn,
33 unsigned long startpfn,
34 unsigned long endpfn);
35 extern unsigned long init_bootmem(unsigned long addr, unsigned long memend);
37 extern unsigned long free_all_bootmem(void);
38 extern void reset_node_managed_pages(pg_data_t *pgdat);
39 extern void reset_all_zones_managed_pages(void);
41 extern void free_bootmem_node(pg_data_t *pgdat,
44 extern void free_bootmem(unsigned long physaddr, unsigned long size);
45 extern void free_bootmem_late(unsigned long physaddr, unsigned long size);
48 * Flags for reserve_bootmem (also if CONFIG_HAVE_ARCH_BOOTMEM_NODE,
49 * the architecture-specific code should honor this).
51 * If flags is BOOTMEM_DEFAULT, then the return value is always 0 (success).
52 * If flags contains BOOTMEM_EXCLUSIVE, then -EBUSY is returned if the memory
53 * already was reserved.
55 #define BOOTMEM_DEFAULT 0
56 #define BOOTMEM_EXCLUSIVE (1<<0)
58 extern int reserve_bootmem(unsigned long addr,
61 extern int reserve_bootmem_node(pg_data_t *pgdat,
62 unsigned long physaddr,
66 extern void *__alloc_bootmem(unsigned long size,
69 extern void *__alloc_bootmem_nopanic(unsigned long size,
71 unsigned long goal) __malloc;
72 extern void *__alloc_bootmem_node(pg_data_t *pgdat,
75 unsigned long goal) __malloc;
76 void *__alloc_bootmem_node_high(pg_data_t *pgdat,
79 unsigned long goal) __malloc;
80 extern void *__alloc_bootmem_node_nopanic(pg_data_t *pgdat,
83 unsigned long goal) __malloc;
84 void *___alloc_bootmem_node_nopanic(pg_data_t *pgdat,
88 unsigned long limit) __malloc;
89 extern void *__alloc_bootmem_low(unsigned long size,
91 unsigned long goal) __malloc;
92 void *__alloc_bootmem_low_nopanic(unsigned long size,
94 unsigned long goal) __malloc;
95 extern void *__alloc_bootmem_low_node(pg_data_t *pgdat,
98 unsigned long goal) __malloc;
100 /* We are using top down, so it is safe to use 0 here */
101 #define BOOTMEM_LOW_LIMIT 0
103 #ifndef ARCH_LOW_ADDRESS_LIMIT
104 #define ARCH_LOW_ADDRESS_LIMIT 0xffffffffUL
107 #define alloc_bootmem(x) \
108 __alloc_bootmem(x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
109 #define alloc_bootmem_align(x, align) \
110 __alloc_bootmem(x, align, BOOTMEM_LOW_LIMIT)
111 #define alloc_bootmem_nopanic(x) \
112 __alloc_bootmem_nopanic(x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
113 #define alloc_bootmem_pages(x) \
114 __alloc_bootmem(x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
115 #define alloc_bootmem_pages_nopanic(x) \
116 __alloc_bootmem_nopanic(x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
117 #define alloc_bootmem_node(pgdat, x) \
118 __alloc_bootmem_node(pgdat, x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
119 #define alloc_bootmem_node_nopanic(pgdat, x) \
120 __alloc_bootmem_node_nopanic(pgdat, x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
121 #define alloc_bootmem_pages_node(pgdat, x) \
122 __alloc_bootmem_node(pgdat, x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
123 #define alloc_bootmem_pages_node_nopanic(pgdat, x) \
124 __alloc_bootmem_node_nopanic(pgdat, x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
126 #define alloc_bootmem_low(x) \
127 __alloc_bootmem_low(x, SMP_CACHE_BYTES, 0)
128 #define alloc_bootmem_low_pages_nopanic(x) \
129 __alloc_bootmem_low_nopanic(x, PAGE_SIZE, 0)
130 #define alloc_bootmem_low_pages(x) \
131 __alloc_bootmem_low(x, PAGE_SIZE, 0)
132 #define alloc_bootmem_low_pages_node(pgdat, x) \
133 __alloc_bootmem_low_node(pgdat, x, PAGE_SIZE, 0)
136 #if defined(CONFIG_HAVE_MEMBLOCK)
138 /* FIXME: use MEMBLOCK_ALLOC_* variants here */
139 #define BOOTMEM_ALLOC_ACCESSIBLE 0
140 #define BOOTMEM_ALLOC_ANYWHERE (~(phys_addr_t)0)
142 /* FIXME: Move to memblock.h at a point where we remove nobootmem.c */
143 void *memblock_virt_alloc_try_nid_raw(phys_addr_t size, phys_addr_t align,
144 phys_addr_t min_addr,
145 phys_addr_t max_addr, int nid);
146 void *memblock_virt_alloc_try_nid_nopanic(phys_addr_t size,
147 phys_addr_t align, phys_addr_t min_addr,
148 phys_addr_t max_addr, int nid);
149 void *memblock_virt_alloc_try_nid(phys_addr_t size, phys_addr_t align,
150 phys_addr_t min_addr, phys_addr_t max_addr, int nid);
151 void __memblock_free_early(phys_addr_t base, phys_addr_t size);
152 void __memblock_free_late(phys_addr_t base, phys_addr_t size);
154 static inline void * __init memblock_virt_alloc(
155 phys_addr_t size, phys_addr_t align)
157 return memblock_virt_alloc_try_nid(size, align, BOOTMEM_LOW_LIMIT,
158 BOOTMEM_ALLOC_ACCESSIBLE,
162 static inline void * __init memblock_virt_alloc_raw(
163 phys_addr_t size, phys_addr_t align)
165 return memblock_virt_alloc_try_nid_raw(size, align, BOOTMEM_LOW_LIMIT,
166 BOOTMEM_ALLOC_ACCESSIBLE,
170 static inline void * __init memblock_virt_alloc_nopanic(
171 phys_addr_t size, phys_addr_t align)
173 return memblock_virt_alloc_try_nid_nopanic(size, align,
175 BOOTMEM_ALLOC_ACCESSIBLE,
179 static inline void * __init memblock_virt_alloc_low(
180 phys_addr_t size, phys_addr_t align)
182 return memblock_virt_alloc_try_nid(size, align,
184 ARCH_LOW_ADDRESS_LIMIT,
187 static inline void * __init memblock_virt_alloc_low_nopanic(
188 phys_addr_t size, phys_addr_t align)
190 return memblock_virt_alloc_try_nid_nopanic(size, align,
192 ARCH_LOW_ADDRESS_LIMIT,
196 static inline void * __init memblock_virt_alloc_from_nopanic(
197 phys_addr_t size, phys_addr_t align, phys_addr_t min_addr)
199 return memblock_virt_alloc_try_nid_nopanic(size, align, min_addr,
200 BOOTMEM_ALLOC_ACCESSIBLE,
204 static inline void * __init memblock_virt_alloc_node(
205 phys_addr_t size, int nid)
207 return memblock_virt_alloc_try_nid(size, 0, BOOTMEM_LOW_LIMIT,
208 BOOTMEM_ALLOC_ACCESSIBLE, nid);
211 static inline void * __init memblock_virt_alloc_node_nopanic(
212 phys_addr_t size, int nid)
214 return memblock_virt_alloc_try_nid_nopanic(size, 0, BOOTMEM_LOW_LIMIT,
215 BOOTMEM_ALLOC_ACCESSIBLE,
219 static inline void __init memblock_free_early(
220 phys_addr_t base, phys_addr_t size)
222 __memblock_free_early(base, size);
225 static inline void __init memblock_free_early_nid(
226 phys_addr_t base, phys_addr_t size, int nid)
228 __memblock_free_early(base, size);
231 static inline void __init memblock_free_late(
232 phys_addr_t base, phys_addr_t size)
234 __memblock_free_late(base, size);
239 #define BOOTMEM_ALLOC_ACCESSIBLE 0
242 /* Fall back to all the existing bootmem APIs */
243 static inline void * __init memblock_virt_alloc(
244 phys_addr_t size, phys_addr_t align)
247 align = SMP_CACHE_BYTES;
248 return __alloc_bootmem(size, align, BOOTMEM_LOW_LIMIT);
251 static inline void * __init memblock_virt_alloc_raw(
252 phys_addr_t size, phys_addr_t align)
255 align = SMP_CACHE_BYTES;
256 return __alloc_bootmem_nopanic(size, align, BOOTMEM_LOW_LIMIT);
259 static inline void * __init memblock_virt_alloc_nopanic(
260 phys_addr_t size, phys_addr_t align)
263 align = SMP_CACHE_BYTES;
264 return __alloc_bootmem_nopanic(size, align, BOOTMEM_LOW_LIMIT);
267 static inline void * __init memblock_virt_alloc_low(
268 phys_addr_t size, phys_addr_t align)
271 align = SMP_CACHE_BYTES;
272 return __alloc_bootmem_low(size, align, 0);
275 static inline void * __init memblock_virt_alloc_low_nopanic(
276 phys_addr_t size, phys_addr_t align)
279 align = SMP_CACHE_BYTES;
280 return __alloc_bootmem_low_nopanic(size, align, 0);
283 static inline void * __init memblock_virt_alloc_from_nopanic(
284 phys_addr_t size, phys_addr_t align, phys_addr_t min_addr)
286 return __alloc_bootmem_nopanic(size, align, min_addr);
289 static inline void * __init memblock_virt_alloc_node(
290 phys_addr_t size, int nid)
292 return __alloc_bootmem_node(NODE_DATA(nid), size, SMP_CACHE_BYTES,
296 static inline void * __init memblock_virt_alloc_node_nopanic(
297 phys_addr_t size, int nid)
299 return __alloc_bootmem_node_nopanic(NODE_DATA(nid), size,
304 static inline void * __init memblock_virt_alloc_try_nid(phys_addr_t size,
305 phys_addr_t align, phys_addr_t min_addr, phys_addr_t max_addr, int nid)
307 return __alloc_bootmem_node_high(NODE_DATA(nid), size, align,
311 static inline void * __init memblock_virt_alloc_try_nid_raw(
312 phys_addr_t size, phys_addr_t align,
313 phys_addr_t min_addr, phys_addr_t max_addr, int nid)
315 return ___alloc_bootmem_node_nopanic(NODE_DATA(nid), size, align,
319 static inline void * __init memblock_virt_alloc_try_nid_nopanic(
320 phys_addr_t size, phys_addr_t align,
321 phys_addr_t min_addr, phys_addr_t max_addr, int nid)
323 return ___alloc_bootmem_node_nopanic(NODE_DATA(nid), size, align,
327 static inline void __init memblock_free_early(
328 phys_addr_t base, phys_addr_t size)
330 free_bootmem(base, size);
333 static inline void __init memblock_free_early_nid(
334 phys_addr_t base, phys_addr_t size, int nid)
336 free_bootmem_node(NODE_DATA(nid), base, size);
339 static inline void __init memblock_free_late(
340 phys_addr_t base, phys_addr_t size)
342 free_bootmem_late(base, size);
344 #endif /* defined(CONFIG_HAVE_MEMBLOCK) */
346 extern void *alloc_large_system_hash(const char *tablename,
347 unsigned long bucketsize,
348 unsigned long numentries,
351 unsigned int *_hash_shift,
352 unsigned int *_hash_mask,
353 unsigned long low_limit,
354 unsigned long high_limit);
356 #define HASH_EARLY 0x00000001 /* Allocating during early boot? */
357 #define HASH_SMALL 0x00000002 /* sub-page allocation allowed, min
358 * shift passed via *_hash_shift */
359 #define HASH_ZERO 0x00000004 /* Zero allocated hash table */
361 /* Only NUMA needs hash distribution. 64bit NUMA architectures have
362 * sufficient vmalloc space.
365 #define HASHDIST_DEFAULT IS_ENABLED(CONFIG_64BIT)
366 extern int hashdist; /* Distribute hashes across NUMA nodes? */
372 #endif /* _LINUX_BOOTMEM_H */