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>
10 #include <asm/processor.h>
13 * simple boot-time physical memory area allocator.
16 extern unsigned long max_low_pfn
;
17 extern unsigned long min_low_pfn
;
22 extern unsigned long max_pfn
;
24 * highest possible page
26 extern unsigned long long max_possible_pfn
;
28 #ifndef CONFIG_NO_BOOTMEM
30 * node_bootmem_map is a map pointer - the bits represent all physical
31 * memory pages (including holes) on the node.
33 typedef struct bootmem_data
{
34 unsigned long node_min_pfn
;
35 unsigned long node_low_pfn
;
36 void *node_bootmem_map
;
37 unsigned long last_end_off
;
38 unsigned long hint_idx
;
39 struct list_head list
;
42 extern bootmem_data_t bootmem_node_data
[];
45 extern unsigned long bootmem_bootmap_pages(unsigned long);
47 extern unsigned long init_bootmem_node(pg_data_t
*pgdat
,
48 unsigned long freepfn
,
49 unsigned long startpfn
,
50 unsigned long endpfn
);
51 extern unsigned long init_bootmem(unsigned long addr
, unsigned long memend
);
53 extern unsigned long free_all_bootmem(void);
54 extern void reset_node_managed_pages(pg_data_t
*pgdat
);
55 extern void reset_all_zones_managed_pages(void);
57 extern void free_bootmem_node(pg_data_t
*pgdat
,
60 extern void free_bootmem(unsigned long physaddr
, unsigned long size
);
61 extern void free_bootmem_late(unsigned long physaddr
, unsigned long size
);
64 * Flags for reserve_bootmem (also if CONFIG_HAVE_ARCH_BOOTMEM_NODE,
65 * the architecture-specific code should honor this).
67 * If flags is BOOTMEM_DEFAULT, then the return value is always 0 (success).
68 * If flags contains BOOTMEM_EXCLUSIVE, then -EBUSY is returned if the memory
69 * already was reserved.
71 #define BOOTMEM_DEFAULT 0
72 #define BOOTMEM_EXCLUSIVE (1<<0)
74 extern int reserve_bootmem(unsigned long addr
,
77 extern int reserve_bootmem_node(pg_data_t
*pgdat
,
78 unsigned long physaddr
,
82 extern void *__alloc_bootmem(unsigned long size
,
85 extern void *__alloc_bootmem_nopanic(unsigned long size
,
87 unsigned long goal
) __malloc
;
88 extern void *__alloc_bootmem_node(pg_data_t
*pgdat
,
91 unsigned long goal
) __malloc
;
92 void *__alloc_bootmem_node_high(pg_data_t
*pgdat
,
95 unsigned long goal
) __malloc
;
96 extern void *__alloc_bootmem_node_nopanic(pg_data_t
*pgdat
,
99 unsigned long goal
) __malloc
;
100 void *___alloc_bootmem_node_nopanic(pg_data_t
*pgdat
,
104 unsigned long limit
) __malloc
;
105 extern void *__alloc_bootmem_low(unsigned long size
,
107 unsigned long goal
) __malloc
;
108 void *__alloc_bootmem_low_nopanic(unsigned long size
,
110 unsigned long goal
) __malloc
;
111 extern void *__alloc_bootmem_low_node(pg_data_t
*pgdat
,
114 unsigned long goal
) __malloc
;
116 #ifdef CONFIG_NO_BOOTMEM
117 /* We are using top down, so it is safe to use 0 here */
118 #define BOOTMEM_LOW_LIMIT 0
120 #define BOOTMEM_LOW_LIMIT __pa(MAX_DMA_ADDRESS)
123 #ifndef ARCH_LOW_ADDRESS_LIMIT
124 #define ARCH_LOW_ADDRESS_LIMIT 0xffffffffUL
127 #define alloc_bootmem(x) \
128 __alloc_bootmem(x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
129 #define alloc_bootmem_align(x, align) \
130 __alloc_bootmem(x, align, BOOTMEM_LOW_LIMIT)
131 #define alloc_bootmem_nopanic(x) \
132 __alloc_bootmem_nopanic(x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
133 #define alloc_bootmem_pages(x) \
134 __alloc_bootmem(x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
135 #define alloc_bootmem_pages_nopanic(x) \
136 __alloc_bootmem_nopanic(x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
137 #define alloc_bootmem_node(pgdat, x) \
138 __alloc_bootmem_node(pgdat, x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
139 #define alloc_bootmem_node_nopanic(pgdat, x) \
140 __alloc_bootmem_node_nopanic(pgdat, x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
141 #define alloc_bootmem_pages_node(pgdat, x) \
142 __alloc_bootmem_node(pgdat, x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
143 #define alloc_bootmem_pages_node_nopanic(pgdat, x) \
144 __alloc_bootmem_node_nopanic(pgdat, x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
146 #define alloc_bootmem_low(x) \
147 __alloc_bootmem_low(x, SMP_CACHE_BYTES, 0)
148 #define alloc_bootmem_low_pages_nopanic(x) \
149 __alloc_bootmem_low_nopanic(x, PAGE_SIZE, 0)
150 #define alloc_bootmem_low_pages(x) \
151 __alloc_bootmem_low(x, PAGE_SIZE, 0)
152 #define alloc_bootmem_low_pages_node(pgdat, x) \
153 __alloc_bootmem_low_node(pgdat, x, PAGE_SIZE, 0)
156 #if defined(CONFIG_HAVE_MEMBLOCK) && defined(CONFIG_NO_BOOTMEM)
158 /* FIXME: use MEMBLOCK_ALLOC_* variants here */
159 #define BOOTMEM_ALLOC_ACCESSIBLE 0
160 #define BOOTMEM_ALLOC_ANYWHERE (~(phys_addr_t)0)
162 /* FIXME: Move to memblock.h at a point where we remove nobootmem.c */
163 void *memblock_virt_alloc_try_nid_nopanic(phys_addr_t size
,
164 phys_addr_t align
, phys_addr_t min_addr
,
165 phys_addr_t max_addr
, int nid
);
166 void *memblock_virt_alloc_try_nid(phys_addr_t size
, phys_addr_t align
,
167 phys_addr_t min_addr
, phys_addr_t max_addr
, int nid
);
168 void __memblock_free_early(phys_addr_t base
, phys_addr_t size
);
169 void __memblock_free_late(phys_addr_t base
, phys_addr_t size
);
171 static inline void * __init
memblock_virt_alloc(
172 phys_addr_t size
, phys_addr_t align
)
174 return memblock_virt_alloc_try_nid(size
, align
, BOOTMEM_LOW_LIMIT
,
175 BOOTMEM_ALLOC_ACCESSIBLE
,
179 static inline void * __init
memblock_virt_alloc_nopanic(
180 phys_addr_t size
, phys_addr_t align
)
182 return memblock_virt_alloc_try_nid_nopanic(size
, align
,
184 BOOTMEM_ALLOC_ACCESSIBLE
,
188 static inline void * __init
memblock_virt_alloc_low(
189 phys_addr_t size
, phys_addr_t align
)
191 return memblock_virt_alloc_try_nid(size
, align
,
193 ARCH_LOW_ADDRESS_LIMIT
,
196 static inline void * __init
memblock_virt_alloc_low_nopanic(
197 phys_addr_t size
, phys_addr_t align
)
199 return memblock_virt_alloc_try_nid_nopanic(size
, align
,
201 ARCH_LOW_ADDRESS_LIMIT
,
205 static inline void * __init
memblock_virt_alloc_from_nopanic(
206 phys_addr_t size
, phys_addr_t align
, phys_addr_t min_addr
)
208 return memblock_virt_alloc_try_nid_nopanic(size
, align
, min_addr
,
209 BOOTMEM_ALLOC_ACCESSIBLE
,
213 static inline void * __init
memblock_virt_alloc_node(
214 phys_addr_t size
, int nid
)
216 return memblock_virt_alloc_try_nid(size
, 0, BOOTMEM_LOW_LIMIT
,
217 BOOTMEM_ALLOC_ACCESSIBLE
, nid
);
220 static inline void * __init
memblock_virt_alloc_node_nopanic(
221 phys_addr_t size
, int nid
)
223 return memblock_virt_alloc_try_nid_nopanic(size
, 0, BOOTMEM_LOW_LIMIT
,
224 BOOTMEM_ALLOC_ACCESSIBLE
,
228 static inline void __init
memblock_free_early(
229 phys_addr_t base
, phys_addr_t size
)
231 __memblock_free_early(base
, size
);
234 static inline void __init
memblock_free_early_nid(
235 phys_addr_t base
, phys_addr_t size
, int nid
)
237 __memblock_free_early(base
, size
);
240 static inline void __init
memblock_free_late(
241 phys_addr_t base
, phys_addr_t size
)
243 __memblock_free_late(base
, size
);
248 #define BOOTMEM_ALLOC_ACCESSIBLE 0
251 /* Fall back to all the existing bootmem APIs */
252 static inline void * __init
memblock_virt_alloc(
253 phys_addr_t size
, phys_addr_t align
)
256 align
= SMP_CACHE_BYTES
;
257 return __alloc_bootmem(size
, align
, BOOTMEM_LOW_LIMIT
);
260 static inline void * __init
memblock_virt_alloc_nopanic(
261 phys_addr_t size
, phys_addr_t align
)
264 align
= SMP_CACHE_BYTES
;
265 return __alloc_bootmem_nopanic(size
, align
, BOOTMEM_LOW_LIMIT
);
268 static inline void * __init
memblock_virt_alloc_low(
269 phys_addr_t size
, phys_addr_t align
)
272 align
= SMP_CACHE_BYTES
;
273 return __alloc_bootmem_low(size
, align
, 0);
276 static inline void * __init
memblock_virt_alloc_low_nopanic(
277 phys_addr_t size
, phys_addr_t align
)
280 align
= SMP_CACHE_BYTES
;
281 return __alloc_bootmem_low_nopanic(size
, align
, 0);
284 static inline void * __init
memblock_virt_alloc_from_nopanic(
285 phys_addr_t size
, phys_addr_t align
, phys_addr_t min_addr
)
287 return __alloc_bootmem_nopanic(size
, align
, min_addr
);
290 static inline void * __init
memblock_virt_alloc_node(
291 phys_addr_t size
, int nid
)
293 return __alloc_bootmem_node(NODE_DATA(nid
), size
, SMP_CACHE_BYTES
,
297 static inline void * __init
memblock_virt_alloc_node_nopanic(
298 phys_addr_t size
, int nid
)
300 return __alloc_bootmem_node_nopanic(NODE_DATA(nid
), size
,
305 static inline void * __init
memblock_virt_alloc_try_nid(phys_addr_t size
,
306 phys_addr_t align
, phys_addr_t min_addr
, phys_addr_t max_addr
, int nid
)
308 return __alloc_bootmem_node_high(NODE_DATA(nid
), size
, align
,
312 static inline void * __init
memblock_virt_alloc_try_nid_nopanic(
313 phys_addr_t size
, phys_addr_t align
,
314 phys_addr_t min_addr
, phys_addr_t max_addr
, int nid
)
316 return ___alloc_bootmem_node_nopanic(NODE_DATA(nid
), size
, align
,
320 static inline void __init
memblock_free_early(
321 phys_addr_t base
, phys_addr_t size
)
323 free_bootmem(base
, size
);
326 static inline void __init
memblock_free_early_nid(
327 phys_addr_t base
, phys_addr_t size
, int nid
)
329 free_bootmem_node(NODE_DATA(nid
), base
, size
);
332 static inline void __init
memblock_free_late(
333 phys_addr_t base
, phys_addr_t size
)
335 free_bootmem_late(base
, size
);
337 #endif /* defined(CONFIG_HAVE_MEMBLOCK) && defined(CONFIG_NO_BOOTMEM) */
339 #ifdef CONFIG_HAVE_ARCH_ALLOC_REMAP
340 extern void *alloc_remap(int nid
, unsigned long size
);
342 static inline void *alloc_remap(int nid
, unsigned long size
)
346 #endif /* CONFIG_HAVE_ARCH_ALLOC_REMAP */
348 extern void *alloc_large_system_hash(const char *tablename
,
349 unsigned long bucketsize
,
350 unsigned long numentries
,
353 unsigned int *_hash_shift
,
354 unsigned int *_hash_mask
,
355 unsigned long low_limit
,
356 unsigned long high_limit
);
358 #define HASH_EARLY 0x00000001 /* Allocating during early boot? */
359 #define HASH_SMALL 0x00000002 /* sub-page allocation allowed, min
360 * shift passed via *_hash_shift */
361 #define HASH_ZERO 0x00000004 /* Zero allocated hash table */
363 /* Only NUMA needs hash distribution. 64bit NUMA architectures have
364 * sufficient vmalloc space.
367 #define HASHDIST_DEFAULT IS_ENABLED(CONFIG_64BIT)
368 extern int hashdist
; /* Distribute hashes across NUMA nodes? */
374 #endif /* _LINUX_BOOTMEM_H */