Linux kernel mirror (for testing)
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linux
1/*
2 * Discontiguous memory support, Kanoj Sarcar, SGI, Nov 1999
3 */
4#ifndef _LINUX_BOOTMEM_H
5#define _LINUX_BOOTMEM_H
6
7#include <linux/mmzone.h>
8#include <linux/mm_types.h>
9#include <asm/dma.h>
10#include <asm/processor.h>
11
12/*
13 * simple boot-time physical memory area allocator.
14 */
15
16extern unsigned long max_low_pfn;
17extern unsigned long min_low_pfn;
18
19/*
20 * highest page
21 */
22extern unsigned long max_pfn;
23/*
24 * highest possible page
25 */
26extern unsigned long long max_possible_pfn;
27
28#ifndef CONFIG_NO_BOOTMEM
29/*
30 * node_bootmem_map is a map pointer - the bits represent all physical
31 * memory pages (including holes) on the node.
32 */
33typedef 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;
40} bootmem_data_t;
41
42extern bootmem_data_t bootmem_node_data[];
43#endif
44
45extern unsigned long bootmem_bootmap_pages(unsigned long);
46
47extern unsigned long init_bootmem_node(pg_data_t *pgdat,
48 unsigned long freepfn,
49 unsigned long startpfn,
50 unsigned long endpfn);
51extern unsigned long init_bootmem(unsigned long addr, unsigned long memend);
52
53extern unsigned long free_all_bootmem(void);
54extern void reset_node_managed_pages(pg_data_t *pgdat);
55extern void reset_all_zones_managed_pages(void);
56
57extern void free_bootmem_node(pg_data_t *pgdat,
58 unsigned long addr,
59 unsigned long size);
60extern void free_bootmem(unsigned long physaddr, unsigned long size);
61extern void free_bootmem_late(unsigned long physaddr, unsigned long size);
62
63/*
64 * Flags for reserve_bootmem (also if CONFIG_HAVE_ARCH_BOOTMEM_NODE,
65 * the architecture-specific code should honor this).
66 *
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.
70 */
71#define BOOTMEM_DEFAULT 0
72#define BOOTMEM_EXCLUSIVE (1<<0)
73
74extern int reserve_bootmem(unsigned long addr,
75 unsigned long size,
76 int flags);
77extern int reserve_bootmem_node(pg_data_t *pgdat,
78 unsigned long physaddr,
79 unsigned long size,
80 int flags);
81
82extern void *__alloc_bootmem(unsigned long size,
83 unsigned long align,
84 unsigned long goal);
85extern void *__alloc_bootmem_nopanic(unsigned long size,
86 unsigned long align,
87 unsigned long goal) __malloc;
88extern void *__alloc_bootmem_node(pg_data_t *pgdat,
89 unsigned long size,
90 unsigned long align,
91 unsigned long goal) __malloc;
92void *__alloc_bootmem_node_high(pg_data_t *pgdat,
93 unsigned long size,
94 unsigned long align,
95 unsigned long goal) __malloc;
96extern void *__alloc_bootmem_node_nopanic(pg_data_t *pgdat,
97 unsigned long size,
98 unsigned long align,
99 unsigned long goal) __malloc;
100void *___alloc_bootmem_node_nopanic(pg_data_t *pgdat,
101 unsigned long size,
102 unsigned long align,
103 unsigned long goal,
104 unsigned long limit) __malloc;
105extern void *__alloc_bootmem_low(unsigned long size,
106 unsigned long align,
107 unsigned long goal) __malloc;
108void *__alloc_bootmem_low_nopanic(unsigned long size,
109 unsigned long align,
110 unsigned long goal) __malloc;
111extern void *__alloc_bootmem_low_node(pg_data_t *pgdat,
112 unsigned long size,
113 unsigned long align,
114 unsigned long goal) __malloc;
115
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
119#else
120#define BOOTMEM_LOW_LIMIT __pa(MAX_DMA_ADDRESS)
121#endif
122
123#ifndef ARCH_LOW_ADDRESS_LIMIT
124#define ARCH_LOW_ADDRESS_LIMIT 0xffffffffUL
125#endif
126
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)
145
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)
154
155
156#if defined(CONFIG_HAVE_MEMBLOCK) && defined(CONFIG_NO_BOOTMEM)
157
158/* FIXME: use MEMBLOCK_ALLOC_* variants here */
159#define BOOTMEM_ALLOC_ACCESSIBLE 0
160#define BOOTMEM_ALLOC_ANYWHERE (~(phys_addr_t)0)
161
162/* FIXME: Move to memblock.h at a point where we remove nobootmem.c */
163void *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);
166void *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);
168void __memblock_free_early(phys_addr_t base, phys_addr_t size);
169void __memblock_free_late(phys_addr_t base, phys_addr_t size);
170
171static inline void * __init memblock_virt_alloc(
172 phys_addr_t size, phys_addr_t align)
173{
174 return memblock_virt_alloc_try_nid(size, align, BOOTMEM_LOW_LIMIT,
175 BOOTMEM_ALLOC_ACCESSIBLE,
176 NUMA_NO_NODE);
177}
178
179static inline void * __init memblock_virt_alloc_nopanic(
180 phys_addr_t size, phys_addr_t align)
181{
182 return memblock_virt_alloc_try_nid_nopanic(size, align,
183 BOOTMEM_LOW_LIMIT,
184 BOOTMEM_ALLOC_ACCESSIBLE,
185 NUMA_NO_NODE);
186}
187
188static inline void * __init memblock_virt_alloc_low(
189 phys_addr_t size, phys_addr_t align)
190{
191 return memblock_virt_alloc_try_nid(size, align,
192 BOOTMEM_LOW_LIMIT,
193 ARCH_LOW_ADDRESS_LIMIT,
194 NUMA_NO_NODE);
195}
196static inline void * __init memblock_virt_alloc_low_nopanic(
197 phys_addr_t size, phys_addr_t align)
198{
199 return memblock_virt_alloc_try_nid_nopanic(size, align,
200 BOOTMEM_LOW_LIMIT,
201 ARCH_LOW_ADDRESS_LIMIT,
202 NUMA_NO_NODE);
203}
204
205static inline void * __init memblock_virt_alloc_from_nopanic(
206 phys_addr_t size, phys_addr_t align, phys_addr_t min_addr)
207{
208 return memblock_virt_alloc_try_nid_nopanic(size, align, min_addr,
209 BOOTMEM_ALLOC_ACCESSIBLE,
210 NUMA_NO_NODE);
211}
212
213static inline void * __init memblock_virt_alloc_node(
214 phys_addr_t size, int nid)
215{
216 return memblock_virt_alloc_try_nid(size, 0, BOOTMEM_LOW_LIMIT,
217 BOOTMEM_ALLOC_ACCESSIBLE, nid);
218}
219
220static inline void * __init memblock_virt_alloc_node_nopanic(
221 phys_addr_t size, int nid)
222{
223 return memblock_virt_alloc_try_nid_nopanic(size, 0, BOOTMEM_LOW_LIMIT,
224 BOOTMEM_ALLOC_ACCESSIBLE,
225 nid);
226}
227
228static inline void __init memblock_free_early(
229 phys_addr_t base, phys_addr_t size)
230{
231 __memblock_free_early(base, size);
232}
233
234static inline void __init memblock_free_early_nid(
235 phys_addr_t base, phys_addr_t size, int nid)
236{
237 __memblock_free_early(base, size);
238}
239
240static inline void __init memblock_free_late(
241 phys_addr_t base, phys_addr_t size)
242{
243 __memblock_free_late(base, size);
244}
245
246#else
247
248#define BOOTMEM_ALLOC_ACCESSIBLE 0
249
250
251/* Fall back to all the existing bootmem APIs */
252static inline void * __init memblock_virt_alloc(
253 phys_addr_t size, phys_addr_t align)
254{
255 if (!align)
256 align = SMP_CACHE_BYTES;
257 return __alloc_bootmem(size, align, BOOTMEM_LOW_LIMIT);
258}
259
260static inline void * __init memblock_virt_alloc_nopanic(
261 phys_addr_t size, phys_addr_t align)
262{
263 if (!align)
264 align = SMP_CACHE_BYTES;
265 return __alloc_bootmem_nopanic(size, align, BOOTMEM_LOW_LIMIT);
266}
267
268static inline void * __init memblock_virt_alloc_low(
269 phys_addr_t size, phys_addr_t align)
270{
271 if (!align)
272 align = SMP_CACHE_BYTES;
273 return __alloc_bootmem_low(size, align, 0);
274}
275
276static inline void * __init memblock_virt_alloc_low_nopanic(
277 phys_addr_t size, phys_addr_t align)
278{
279 if (!align)
280 align = SMP_CACHE_BYTES;
281 return __alloc_bootmem_low_nopanic(size, align, 0);
282}
283
284static inline void * __init memblock_virt_alloc_from_nopanic(
285 phys_addr_t size, phys_addr_t align, phys_addr_t min_addr)
286{
287 return __alloc_bootmem_nopanic(size, align, min_addr);
288}
289
290static inline void * __init memblock_virt_alloc_node(
291 phys_addr_t size, int nid)
292{
293 return __alloc_bootmem_node(NODE_DATA(nid), size, SMP_CACHE_BYTES,
294 BOOTMEM_LOW_LIMIT);
295}
296
297static inline void * __init memblock_virt_alloc_node_nopanic(
298 phys_addr_t size, int nid)
299{
300 return __alloc_bootmem_node_nopanic(NODE_DATA(nid), size,
301 SMP_CACHE_BYTES,
302 BOOTMEM_LOW_LIMIT);
303}
304
305static 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)
307{
308 return __alloc_bootmem_node_high(NODE_DATA(nid), size, align,
309 min_addr);
310}
311
312static 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)
315{
316 return ___alloc_bootmem_node_nopanic(NODE_DATA(nid), size, align,
317 min_addr, max_addr);
318}
319
320static inline void __init memblock_free_early(
321 phys_addr_t base, phys_addr_t size)
322{
323 free_bootmem(base, size);
324}
325
326static inline void __init memblock_free_early_nid(
327 phys_addr_t base, phys_addr_t size, int nid)
328{
329 free_bootmem_node(NODE_DATA(nid), base, size);
330}
331
332static inline void __init memblock_free_late(
333 phys_addr_t base, phys_addr_t size)
334{
335 free_bootmem_late(base, size);
336}
337#endif /* defined(CONFIG_HAVE_MEMBLOCK) && defined(CONFIG_NO_BOOTMEM) */
338
339#ifdef CONFIG_HAVE_ARCH_ALLOC_REMAP
340extern void *alloc_remap(int nid, unsigned long size);
341#else
342static inline void *alloc_remap(int nid, unsigned long size)
343{
344 return NULL;
345}
346#endif /* CONFIG_HAVE_ARCH_ALLOC_REMAP */
347
348extern void *alloc_large_system_hash(const char *tablename,
349 unsigned long bucketsize,
350 unsigned long numentries,
351 int scale,
352 int flags,
353 unsigned int *_hash_shift,
354 unsigned int *_hash_mask,
355 unsigned long low_limit,
356 unsigned long high_limit);
357
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
362/* Only NUMA needs hash distribution. 64bit NUMA architectures have
363 * sufficient vmalloc space.
364 */
365#ifdef CONFIG_NUMA
366#define HASHDIST_DEFAULT IS_ENABLED(CONFIG_64BIT)
367extern int hashdist; /* Distribute hashes across NUMA nodes? */
368#else
369#define hashdist (0)
370#endif
371
372
373#endif /* _LINUX_BOOTMEM_H */