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 #ifndef CONFIG_NO_BOOTMEM
31 * node_bootmem_map is a map pointer - the bits represent all physical
32 * memory pages (including holes) on the node.
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;
43 extern bootmem_data_t bootmem_node_data[];
46 extern unsigned long bootmem_bootmap_pages(unsigned long);
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);
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);
58 extern void free_bootmem_node(pg_data_t *pgdat,
61 extern void free_bootmem(unsigned long physaddr, unsigned long size);
62 extern void free_bootmem_late(unsigned long physaddr, unsigned long size);
65 * Flags for reserve_bootmem (also if CONFIG_HAVE_ARCH_BOOTMEM_NODE,
66 * the architecture-specific code should honor this).
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.
72 #define BOOTMEM_DEFAULT 0
73 #define BOOTMEM_EXCLUSIVE (1<<0)
75 extern int reserve_bootmem(unsigned long addr,
78 extern int reserve_bootmem_node(pg_data_t *pgdat,
79 unsigned long physaddr,
83 extern void *__alloc_bootmem(unsigned long size,
86 extern void *__alloc_bootmem_nopanic(unsigned long size,
88 unsigned long goal) __malloc;
89 extern void *__alloc_bootmem_node(pg_data_t *pgdat,
92 unsigned long goal) __malloc;
93 void *__alloc_bootmem_node_high(pg_data_t *pgdat,
96 unsigned long goal) __malloc;
97 extern void *__alloc_bootmem_node_nopanic(pg_data_t *pgdat,
100 unsigned long goal) __malloc;
101 void *___alloc_bootmem_node_nopanic(pg_data_t *pgdat,
105 unsigned long limit) __malloc;
106 extern void *__alloc_bootmem_low(unsigned long size,
108 unsigned long goal) __malloc;
109 void *__alloc_bootmem_low_nopanic(unsigned long size,
111 unsigned long goal) __malloc;
112 extern void *__alloc_bootmem_low_node(pg_data_t *pgdat,
115 unsigned long goal) __malloc;
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
121 #define BOOTMEM_LOW_LIMIT __pa(MAX_DMA_ADDRESS)
124 #ifndef ARCH_LOW_ADDRESS_LIMIT
125 #define ARCH_LOW_ADDRESS_LIMIT 0xffffffffUL
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)
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)
157 #if defined(CONFIG_HAVE_MEMBLOCK) && defined(CONFIG_NO_BOOTMEM)
159 /* FIXME: use MEMBLOCK_ALLOC_* variants here */
160 #define BOOTMEM_ALLOC_ACCESSIBLE 0
161 #define BOOTMEM_ALLOC_ANYWHERE (~(phys_addr_t)0)
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);
172 static inline void * __init memblock_virt_alloc(
173 phys_addr_t size, phys_addr_t align)
175 return memblock_virt_alloc_try_nid(size, align, BOOTMEM_LOW_LIMIT,
176 BOOTMEM_ALLOC_ACCESSIBLE,
180 static inline void * __init memblock_virt_alloc_nopanic(
181 phys_addr_t size, phys_addr_t align)
183 return memblock_virt_alloc_try_nid_nopanic(size, align,
185 BOOTMEM_ALLOC_ACCESSIBLE,
189 static inline void * __init memblock_virt_alloc_low(
190 phys_addr_t size, phys_addr_t align)
192 return memblock_virt_alloc_try_nid(size, align,
194 ARCH_LOW_ADDRESS_LIMIT,
197 static inline void * __init memblock_virt_alloc_low_nopanic(
198 phys_addr_t size, phys_addr_t align)
200 return memblock_virt_alloc_try_nid_nopanic(size, align,
202 ARCH_LOW_ADDRESS_LIMIT,
206 static inline void * __init memblock_virt_alloc_from_nopanic(
207 phys_addr_t size, phys_addr_t align, phys_addr_t min_addr)
209 return memblock_virt_alloc_try_nid_nopanic(size, align, min_addr,
210 BOOTMEM_ALLOC_ACCESSIBLE,
214 static inline void * __init memblock_virt_alloc_node(
215 phys_addr_t size, int nid)
217 return memblock_virt_alloc_try_nid(size, 0, BOOTMEM_LOW_LIMIT,
218 BOOTMEM_ALLOC_ACCESSIBLE, nid);
221 static inline void * __init memblock_virt_alloc_node_nopanic(
222 phys_addr_t size, int nid)
224 return memblock_virt_alloc_try_nid_nopanic(size, 0, BOOTMEM_LOW_LIMIT,
225 BOOTMEM_ALLOC_ACCESSIBLE,
229 static inline void __init memblock_free_early(
230 phys_addr_t base, phys_addr_t size)
232 __memblock_free_early(base, size);
235 static inline void __init memblock_free_early_nid(
236 phys_addr_t base, phys_addr_t size, int nid)
238 __memblock_free_early(base, size);
241 static inline void __init memblock_free_late(
242 phys_addr_t base, phys_addr_t size)
244 __memblock_free_late(base, size);
249 #define BOOTMEM_ALLOC_ACCESSIBLE 0
252 /* Fall back to all the existing bootmem APIs */
253 static inline void * __init memblock_virt_alloc(
254 phys_addr_t size, phys_addr_t align)
257 align = SMP_CACHE_BYTES;
258 return __alloc_bootmem(size, align, BOOTMEM_LOW_LIMIT);
261 static inline void * __init memblock_virt_alloc_nopanic(
262 phys_addr_t size, phys_addr_t align)
265 align = SMP_CACHE_BYTES;
266 return __alloc_bootmem_nopanic(size, align, BOOTMEM_LOW_LIMIT);
269 static inline void * __init memblock_virt_alloc_low(
270 phys_addr_t size, phys_addr_t align)
273 align = SMP_CACHE_BYTES;
274 return __alloc_bootmem_low(size, align, 0);
277 static inline void * __init memblock_virt_alloc_low_nopanic(
278 phys_addr_t size, phys_addr_t align)
281 align = SMP_CACHE_BYTES;
282 return __alloc_bootmem_low_nopanic(size, align, 0);
285 static inline void * __init memblock_virt_alloc_from_nopanic(
286 phys_addr_t size, phys_addr_t align, phys_addr_t min_addr)
288 return __alloc_bootmem_nopanic(size, align, min_addr);
291 static inline void * __init memblock_virt_alloc_node(
292 phys_addr_t size, int nid)
294 return __alloc_bootmem_node(NODE_DATA(nid), size, SMP_CACHE_BYTES,
298 static inline void * __init memblock_virt_alloc_node_nopanic(
299 phys_addr_t size, int nid)
301 return __alloc_bootmem_node_nopanic(NODE_DATA(nid), size,
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)
309 return __alloc_bootmem_node_high(NODE_DATA(nid), size, align,
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)
317 return ___alloc_bootmem_node_nopanic(NODE_DATA(nid), size, align,
321 static inline void __init memblock_free_early(
322 phys_addr_t base, phys_addr_t size)
324 free_bootmem(base, size);
327 static inline void __init memblock_free_early_nid(
328 phys_addr_t base, phys_addr_t size, int nid)
330 free_bootmem_node(NODE_DATA(nid), base, size);
333 static inline void __init memblock_free_late(
334 phys_addr_t base, phys_addr_t size)
336 free_bootmem_late(base, size);
338 #endif /* defined(CONFIG_HAVE_MEMBLOCK) && defined(CONFIG_NO_BOOTMEM) */
340 #ifdef CONFIG_HAVE_ARCH_ALLOC_REMAP
341 extern void *alloc_remap(int nid, unsigned long size);
343 static inline void *alloc_remap(int nid, unsigned long size)
347 #endif /* CONFIG_HAVE_ARCH_ALLOC_REMAP */
349 extern void *alloc_large_system_hash(const char *tablename,
350 unsigned long bucketsize,
351 unsigned long numentries,
354 unsigned int *_hash_shift,
355 unsigned int *_hash_mask,
356 unsigned long low_limit,
357 unsigned long high_limit);
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 */
364 /* Only NUMA needs hash distribution. 64bit NUMA architectures have
365 * sufficient vmalloc space.
368 #define HASHDIST_DEFAULT IS_ENABLED(CONFIG_64BIT)
369 extern int hashdist; /* Distribute hashes across NUMA nodes? */
375 #endif /* _LINUX_BOOTMEM_H */