2 * Discontiguous memory support, Kanoj Sarcar, SGI, Nov 1999
4 #ifndef _LINUX_BOOTMEM_H
5 #define _LINUX_BOOTMEM_H
7 #include <linux/mmzone.h>
8 #include <linux/mm_types.h>
12 * simple boot-time physical memory area allocator.
15 extern unsigned long max_low_pfn;
16 extern unsigned long min_low_pfn;
21 extern unsigned long max_pfn;
23 #ifndef CONFIG_NO_BOOTMEM
25 * node_bootmem_map is a map pointer - the bits represent all physical
26 * memory pages (including holes) on the node.
28 typedef struct bootmem_data {
29 unsigned long node_min_pfn;
30 unsigned long node_low_pfn;
31 void *node_bootmem_map;
32 unsigned long last_end_off;
33 unsigned long hint_idx;
34 struct list_head list;
37 extern bootmem_data_t bootmem_node_data[];
40 extern unsigned long bootmem_bootmap_pages(unsigned long);
42 extern unsigned long init_bootmem_node(pg_data_t *pgdat,
43 unsigned long freepfn,
44 unsigned long startpfn,
45 unsigned long endpfn);
46 extern unsigned long init_bootmem(unsigned long addr, unsigned long memend);
48 extern unsigned long free_all_bootmem(void);
49 extern void reset_node_managed_pages(pg_data_t *pgdat);
50 extern void reset_all_zones_managed_pages(void);
52 extern void free_bootmem_node(pg_data_t *pgdat,
55 extern void free_bootmem(unsigned long physaddr, unsigned long size);
56 extern void free_bootmem_late(unsigned long physaddr, unsigned long size);
59 * Flags for reserve_bootmem (also if CONFIG_HAVE_ARCH_BOOTMEM_NODE,
60 * the architecture-specific code should honor this).
62 * If flags is BOOTMEM_DEFAULT, then the return value is always 0 (success).
63 * If flags contains BOOTMEM_EXCLUSIVE, then -EBUSY is returned if the memory
64 * already was reserved.
66 #define BOOTMEM_DEFAULT 0
67 #define BOOTMEM_EXCLUSIVE (1<<0)
69 extern int reserve_bootmem(unsigned long addr,
72 extern int reserve_bootmem_node(pg_data_t *pgdat,
73 unsigned long physaddr,
77 extern void *__alloc_bootmem(unsigned long size,
80 extern void *__alloc_bootmem_nopanic(unsigned long size,
83 extern void *__alloc_bootmem_node(pg_data_t *pgdat,
87 void *__alloc_bootmem_node_high(pg_data_t *pgdat,
91 extern void *__alloc_bootmem_node_nopanic(pg_data_t *pgdat,
95 void *___alloc_bootmem_node_nopanic(pg_data_t *pgdat,
100 extern void *__alloc_bootmem_low(unsigned long size,
103 void *__alloc_bootmem_low_nopanic(unsigned long size,
106 extern void *__alloc_bootmem_low_node(pg_data_t *pgdat,
111 #ifdef CONFIG_NO_BOOTMEM
112 /* We are using top down, so it is safe to use 0 here */
113 #define BOOTMEM_LOW_LIMIT 0
115 #define BOOTMEM_LOW_LIMIT __pa(MAX_DMA_ADDRESS)
118 #define alloc_bootmem(x) \
119 __alloc_bootmem(x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
120 #define alloc_bootmem_align(x, align) \
121 __alloc_bootmem(x, align, BOOTMEM_LOW_LIMIT)
122 #define alloc_bootmem_nopanic(x) \
123 __alloc_bootmem_nopanic(x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
124 #define alloc_bootmem_pages(x) \
125 __alloc_bootmem(x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
126 #define alloc_bootmem_pages_nopanic(x) \
127 __alloc_bootmem_nopanic(x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
128 #define alloc_bootmem_node(pgdat, x) \
129 __alloc_bootmem_node(pgdat, x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
130 #define alloc_bootmem_node_nopanic(pgdat, x) \
131 __alloc_bootmem_node_nopanic(pgdat, x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
132 #define alloc_bootmem_pages_node(pgdat, x) \
133 __alloc_bootmem_node(pgdat, x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
134 #define alloc_bootmem_pages_node_nopanic(pgdat, x) \
135 __alloc_bootmem_node_nopanic(pgdat, x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
137 #define alloc_bootmem_low(x) \
138 __alloc_bootmem_low(x, SMP_CACHE_BYTES, 0)
139 #define alloc_bootmem_low_pages_nopanic(x) \
140 __alloc_bootmem_low_nopanic(x, PAGE_SIZE, 0)
141 #define alloc_bootmem_low_pages(x) \
142 __alloc_bootmem_low(x, PAGE_SIZE, 0)
143 #define alloc_bootmem_low_pages_node(pgdat, x) \
144 __alloc_bootmem_low_node(pgdat, x, PAGE_SIZE, 0)
147 #if defined(CONFIG_HAVE_MEMBLOCK) && defined(CONFIG_NO_BOOTMEM)
149 /* FIXME: use MEMBLOCK_ALLOC_* variants here */
150 #define BOOTMEM_ALLOC_ACCESSIBLE 0
151 #define BOOTMEM_ALLOC_ANYWHERE (~(phys_addr_t)0)
153 /* FIXME: Move to memblock.h at a point where we remove nobootmem.c */
154 void *memblock_virt_alloc_try_nid_nopanic(phys_addr_t size,
155 phys_addr_t align, phys_addr_t min_addr,
156 phys_addr_t max_addr, int nid);
157 void *memblock_virt_alloc_try_nid(phys_addr_t size, phys_addr_t align,
158 phys_addr_t min_addr, phys_addr_t max_addr, int nid);
159 void __memblock_free_early(phys_addr_t base, phys_addr_t size);
160 void __memblock_free_late(phys_addr_t base, phys_addr_t size);
162 static inline void * __init memblock_virt_alloc(
163 phys_addr_t size, phys_addr_t align)
165 return memblock_virt_alloc_try_nid(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 #ifndef ARCH_LOW_ADDRESS_LIMIT
180 #define ARCH_LOW_ADDRESS_LIMIT 0xffffffffUL
183 static inline void * __init memblock_virt_alloc_low(
184 phys_addr_t size, phys_addr_t align)
186 return memblock_virt_alloc_try_nid(size, align,
188 ARCH_LOW_ADDRESS_LIMIT,
191 static inline void * __init memblock_virt_alloc_low_nopanic(
192 phys_addr_t size, phys_addr_t align)
194 return memblock_virt_alloc_try_nid_nopanic(size, align,
196 ARCH_LOW_ADDRESS_LIMIT,
200 static inline void * __init memblock_virt_alloc_from_nopanic(
201 phys_addr_t size, phys_addr_t align, phys_addr_t min_addr)
203 return memblock_virt_alloc_try_nid_nopanic(size, align, min_addr,
204 BOOTMEM_ALLOC_ACCESSIBLE,
208 static inline void * __init memblock_virt_alloc_node(
209 phys_addr_t size, int nid)
211 return memblock_virt_alloc_try_nid(size, 0, BOOTMEM_LOW_LIMIT,
212 BOOTMEM_ALLOC_ACCESSIBLE, nid);
215 static inline void * __init memblock_virt_alloc_node_nopanic(
216 phys_addr_t size, int nid)
218 return memblock_virt_alloc_try_nid_nopanic(size, 0, BOOTMEM_LOW_LIMIT,
219 BOOTMEM_ALLOC_ACCESSIBLE,
223 static inline void __init memblock_free_early(
224 phys_addr_t base, phys_addr_t size)
226 __memblock_free_early(base, size);
229 static inline void __init memblock_free_early_nid(
230 phys_addr_t base, phys_addr_t size, int nid)
232 __memblock_free_early(base, size);
235 static inline void __init memblock_free_late(
236 phys_addr_t base, phys_addr_t size)
238 __memblock_free_late(base, size);
243 #define BOOTMEM_ALLOC_ACCESSIBLE 0
246 /* Fall back to all the existing bootmem APIs */
247 static inline void * __init memblock_virt_alloc(
248 phys_addr_t size, phys_addr_t align)
251 align = SMP_CACHE_BYTES;
252 return __alloc_bootmem(size, align, BOOTMEM_LOW_LIMIT);
255 static inline void * __init memblock_virt_alloc_nopanic(
256 phys_addr_t size, phys_addr_t align)
259 align = SMP_CACHE_BYTES;
260 return __alloc_bootmem_nopanic(size, align, BOOTMEM_LOW_LIMIT);
263 static inline void * __init memblock_virt_alloc_low(
264 phys_addr_t size, phys_addr_t align)
267 align = SMP_CACHE_BYTES;
268 return __alloc_bootmem_low(size, align, 0);
271 static inline void * __init memblock_virt_alloc_low_nopanic(
272 phys_addr_t size, phys_addr_t align)
275 align = SMP_CACHE_BYTES;
276 return __alloc_bootmem_low_nopanic(size, align, 0);
279 static inline void * __init memblock_virt_alloc_from_nopanic(
280 phys_addr_t size, phys_addr_t align, phys_addr_t min_addr)
282 return __alloc_bootmem_nopanic(size, align, min_addr);
285 static inline void * __init memblock_virt_alloc_node(
286 phys_addr_t size, int nid)
288 return __alloc_bootmem_node(NODE_DATA(nid), size, SMP_CACHE_BYTES,
292 static inline void * __init memblock_virt_alloc_node_nopanic(
293 phys_addr_t size, int nid)
295 return __alloc_bootmem_node_nopanic(NODE_DATA(nid), size,
300 static inline void * __init memblock_virt_alloc_try_nid(phys_addr_t size,
301 phys_addr_t align, phys_addr_t min_addr, phys_addr_t max_addr, int nid)
303 return __alloc_bootmem_node_high(NODE_DATA(nid), size, align,
307 static inline void * __init memblock_virt_alloc_try_nid_nopanic(
308 phys_addr_t size, phys_addr_t align,
309 phys_addr_t min_addr, phys_addr_t max_addr, int nid)
311 return ___alloc_bootmem_node_nopanic(NODE_DATA(nid), size, align,
315 static inline void __init memblock_free_early(
316 phys_addr_t base, phys_addr_t size)
318 free_bootmem(base, size);
321 static inline void __init memblock_free_early_nid(
322 phys_addr_t base, phys_addr_t size, int nid)
324 free_bootmem_node(NODE_DATA(nid), base, size);
327 static inline void __init memblock_free_late(
328 phys_addr_t base, phys_addr_t size)
330 free_bootmem_late(base, size);
332 #endif /* defined(CONFIG_HAVE_MEMBLOCK) && defined(CONFIG_NO_BOOTMEM) */
334 #ifdef CONFIG_HAVE_ARCH_ALLOC_REMAP
335 extern void *alloc_remap(int nid, unsigned long size);
337 static inline void *alloc_remap(int nid, unsigned long size)
341 #endif /* CONFIG_HAVE_ARCH_ALLOC_REMAP */
343 extern void *alloc_large_system_hash(const char *tablename,
344 unsigned long bucketsize,
345 unsigned long numentries,
348 unsigned int *_hash_shift,
349 unsigned int *_hash_mask,
350 unsigned long low_limit,
351 unsigned long high_limit);
353 #define HASH_EARLY 0x00000001 /* Allocating during early boot? */
354 #define HASH_SMALL 0x00000002 /* sub-page allocation allowed, min
355 * shift passed via *_hash_shift */
357 /* Only NUMA needs hash distribution. 64bit NUMA architectures have
358 * sufficient vmalloc space.
360 #if defined(CONFIG_NUMA) && defined(CONFIG_64BIT)
361 #define HASHDIST_DEFAULT 1
363 #define HASHDIST_DEFAULT 0
365 extern int hashdist; /* Distribute hashes across NUMA nodes? */
368 #endif /* _LINUX_BOOTMEM_H */