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
11/*
12 * simple boot-time physical memory area allocator.
13 */
14
15extern unsigned long max_low_pfn;
16extern unsigned long min_low_pfn;
17
18/*
19 * highest page
20 */
21extern unsigned long max_pfn;
22
23#ifndef CONFIG_NO_BOOTMEM
24/*
25 * node_bootmem_map is a map pointer - the bits represent all physical
26 * memory pages (including holes) on the node.
27 */
28typedef 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;
35} bootmem_data_t;
36
37extern bootmem_data_t bootmem_node_data[];
38#endif
39
40extern unsigned long bootmem_bootmap_pages(unsigned long);
41
42extern unsigned long init_bootmem_node(pg_data_t *pgdat,
43 unsigned long freepfn,
44 unsigned long startpfn,
45 unsigned long endpfn);
46extern unsigned long init_bootmem(unsigned long addr, unsigned long memend);
47
48extern unsigned long free_all_bootmem(void);
49extern void reset_all_zones_managed_pages(void);
50
51extern void free_bootmem_node(pg_data_t *pgdat,
52 unsigned long addr,
53 unsigned long size);
54extern void free_bootmem(unsigned long physaddr, unsigned long size);
55extern void free_bootmem_late(unsigned long physaddr, unsigned long size);
56
57/*
58 * Flags for reserve_bootmem (also if CONFIG_HAVE_ARCH_BOOTMEM_NODE,
59 * the architecture-specific code should honor this).
60 *
61 * If flags is 0, then the return value is always 0 (success). If
62 * flags contains BOOTMEM_EXCLUSIVE, then -EBUSY is returned if the
63 * memory already was reserved.
64 */
65#define BOOTMEM_DEFAULT 0
66#define BOOTMEM_EXCLUSIVE (1<<0)
67
68extern int reserve_bootmem(unsigned long addr,
69 unsigned long size,
70 int flags);
71extern int reserve_bootmem_node(pg_data_t *pgdat,
72 unsigned long physaddr,
73 unsigned long size,
74 int flags);
75
76extern void *__alloc_bootmem(unsigned long size,
77 unsigned long align,
78 unsigned long goal);
79extern void *__alloc_bootmem_nopanic(unsigned long size,
80 unsigned long align,
81 unsigned long goal);
82extern void *__alloc_bootmem_node(pg_data_t *pgdat,
83 unsigned long size,
84 unsigned long align,
85 unsigned long goal);
86void *__alloc_bootmem_node_high(pg_data_t *pgdat,
87 unsigned long size,
88 unsigned long align,
89 unsigned long goal);
90extern void *__alloc_bootmem_node_nopanic(pg_data_t *pgdat,
91 unsigned long size,
92 unsigned long align,
93 unsigned long goal);
94void *___alloc_bootmem_node_nopanic(pg_data_t *pgdat,
95 unsigned long size,
96 unsigned long align,
97 unsigned long goal,
98 unsigned long limit);
99extern void *__alloc_bootmem_low(unsigned long size,
100 unsigned long align,
101 unsigned long goal);
102void *__alloc_bootmem_low_nopanic(unsigned long size,
103 unsigned long align,
104 unsigned long goal);
105extern void *__alloc_bootmem_low_node(pg_data_t *pgdat,
106 unsigned long size,
107 unsigned long align,
108 unsigned long goal);
109
110#ifdef CONFIG_NO_BOOTMEM
111/* We are using top down, so it is safe to use 0 here */
112#define BOOTMEM_LOW_LIMIT 0
113#else
114#define BOOTMEM_LOW_LIMIT __pa(MAX_DMA_ADDRESS)
115#endif
116
117#define alloc_bootmem(x) \
118 __alloc_bootmem(x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
119#define alloc_bootmem_align(x, align) \
120 __alloc_bootmem(x, align, BOOTMEM_LOW_LIMIT)
121#define alloc_bootmem_nopanic(x) \
122 __alloc_bootmem_nopanic(x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
123#define alloc_bootmem_pages(x) \
124 __alloc_bootmem(x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
125#define alloc_bootmem_pages_nopanic(x) \
126 __alloc_bootmem_nopanic(x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
127#define alloc_bootmem_node(pgdat, x) \
128 __alloc_bootmem_node(pgdat, x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
129#define alloc_bootmem_node_nopanic(pgdat, x) \
130 __alloc_bootmem_node_nopanic(pgdat, x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
131#define alloc_bootmem_pages_node(pgdat, x) \
132 __alloc_bootmem_node(pgdat, x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
133#define alloc_bootmem_pages_node_nopanic(pgdat, x) \
134 __alloc_bootmem_node_nopanic(pgdat, x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
135
136#define alloc_bootmem_low(x) \
137 __alloc_bootmem_low(x, SMP_CACHE_BYTES, 0)
138#define alloc_bootmem_low_pages_nopanic(x) \
139 __alloc_bootmem_low_nopanic(x, PAGE_SIZE, 0)
140#define alloc_bootmem_low_pages(x) \
141 __alloc_bootmem_low(x, PAGE_SIZE, 0)
142#define alloc_bootmem_low_pages_node(pgdat, x) \
143 __alloc_bootmem_low_node(pgdat, x, PAGE_SIZE, 0)
144
145
146#if defined(CONFIG_HAVE_MEMBLOCK) && defined(CONFIG_NO_BOOTMEM)
147
148/* FIXME: use MEMBLOCK_ALLOC_* variants here */
149#define BOOTMEM_ALLOC_ACCESSIBLE 0
150#define BOOTMEM_ALLOC_ANYWHERE (~(phys_addr_t)0)
151
152/* FIXME: Move to memblock.h at a point where we remove nobootmem.c */
153void *memblock_virt_alloc_try_nid_nopanic(phys_addr_t size,
154 phys_addr_t align, phys_addr_t min_addr,
155 phys_addr_t max_addr, int nid);
156void *memblock_virt_alloc_try_nid(phys_addr_t size, phys_addr_t align,
157 phys_addr_t min_addr, phys_addr_t max_addr, int nid);
158void __memblock_free_early(phys_addr_t base, phys_addr_t size);
159void __memblock_free_late(phys_addr_t base, phys_addr_t size);
160
161static inline void * __init memblock_virt_alloc(
162 phys_addr_t size, phys_addr_t align)
163{
164 return memblock_virt_alloc_try_nid(size, align, BOOTMEM_LOW_LIMIT,
165 BOOTMEM_ALLOC_ACCESSIBLE,
166 NUMA_NO_NODE);
167}
168
169static inline void * __init memblock_virt_alloc_nopanic(
170 phys_addr_t size, phys_addr_t align)
171{
172 return memblock_virt_alloc_try_nid_nopanic(size, align,
173 BOOTMEM_LOW_LIMIT,
174 BOOTMEM_ALLOC_ACCESSIBLE,
175 NUMA_NO_NODE);
176}
177
178#ifndef ARCH_LOW_ADDRESS_LIMIT
179#define ARCH_LOW_ADDRESS_LIMIT 0xffffffffUL
180#endif
181
182static inline void * __init memblock_virt_alloc_low(
183 phys_addr_t size, phys_addr_t align)
184{
185 return memblock_virt_alloc_try_nid(size, align,
186 BOOTMEM_LOW_LIMIT,
187 ARCH_LOW_ADDRESS_LIMIT,
188 NUMA_NO_NODE);
189}
190static inline void * __init memblock_virt_alloc_low_nopanic(
191 phys_addr_t size, phys_addr_t align)
192{
193 return memblock_virt_alloc_try_nid_nopanic(size, align,
194 BOOTMEM_LOW_LIMIT,
195 ARCH_LOW_ADDRESS_LIMIT,
196 NUMA_NO_NODE);
197}
198
199static inline void * __init memblock_virt_alloc_from_nopanic(
200 phys_addr_t size, phys_addr_t align, phys_addr_t min_addr)
201{
202 return memblock_virt_alloc_try_nid_nopanic(size, align, min_addr,
203 BOOTMEM_ALLOC_ACCESSIBLE,
204 NUMA_NO_NODE);
205}
206
207static inline void * __init memblock_virt_alloc_node(
208 phys_addr_t size, int nid)
209{
210 return memblock_virt_alloc_try_nid(size, 0, BOOTMEM_LOW_LIMIT,
211 BOOTMEM_ALLOC_ACCESSIBLE, nid);
212}
213
214static inline void * __init memblock_virt_alloc_node_nopanic(
215 phys_addr_t size, int nid)
216{
217 return memblock_virt_alloc_try_nid_nopanic(size, 0, BOOTMEM_LOW_LIMIT,
218 BOOTMEM_ALLOC_ACCESSIBLE,
219 nid);
220}
221
222static inline void __init memblock_free_early(
223 phys_addr_t base, phys_addr_t size)
224{
225 __memblock_free_early(base, size);
226}
227
228static inline void __init memblock_free_early_nid(
229 phys_addr_t base, phys_addr_t size, int nid)
230{
231 __memblock_free_early(base, size);
232}
233
234static inline void __init memblock_free_late(
235 phys_addr_t base, phys_addr_t size)
236{
237 __memblock_free_late(base, size);
238}
239
240#else
241
242#define BOOTMEM_ALLOC_ACCESSIBLE 0
243
244
245/* Fall back to all the existing bootmem APIs */
246static inline void * __init memblock_virt_alloc(
247 phys_addr_t size, phys_addr_t align)
248{
249 if (!align)
250 align = SMP_CACHE_BYTES;
251 return __alloc_bootmem(size, align, BOOTMEM_LOW_LIMIT);
252}
253
254static inline void * __init memblock_virt_alloc_nopanic(
255 phys_addr_t size, phys_addr_t align)
256{
257 if (!align)
258 align = SMP_CACHE_BYTES;
259 return __alloc_bootmem_nopanic(size, align, BOOTMEM_LOW_LIMIT);
260}
261
262static inline void * __init memblock_virt_alloc_low(
263 phys_addr_t size, phys_addr_t align)
264{
265 if (!align)
266 align = SMP_CACHE_BYTES;
267 return __alloc_bootmem_low(size, align, 0);
268}
269
270static inline void * __init memblock_virt_alloc_low_nopanic(
271 phys_addr_t size, phys_addr_t align)
272{
273 if (!align)
274 align = SMP_CACHE_BYTES;
275 return __alloc_bootmem_low_nopanic(size, align, 0);
276}
277
278static inline void * __init memblock_virt_alloc_from_nopanic(
279 phys_addr_t size, phys_addr_t align, phys_addr_t min_addr)
280{
281 return __alloc_bootmem_nopanic(size, align, min_addr);
282}
283
284static inline void * __init memblock_virt_alloc_node(
285 phys_addr_t size, int nid)
286{
287 return __alloc_bootmem_node(NODE_DATA(nid), size, SMP_CACHE_BYTES,
288 BOOTMEM_LOW_LIMIT);
289}
290
291static inline void * __init memblock_virt_alloc_node_nopanic(
292 phys_addr_t size, int nid)
293{
294 return __alloc_bootmem_node_nopanic(NODE_DATA(nid), size,
295 SMP_CACHE_BYTES,
296 BOOTMEM_LOW_LIMIT);
297}
298
299static inline void * __init memblock_virt_alloc_try_nid(phys_addr_t size,
300 phys_addr_t align, phys_addr_t min_addr, phys_addr_t max_addr, int nid)
301{
302 return __alloc_bootmem_node_high(NODE_DATA(nid), size, align,
303 min_addr);
304}
305
306static inline void * __init memblock_virt_alloc_try_nid_nopanic(
307 phys_addr_t size, phys_addr_t align,
308 phys_addr_t min_addr, phys_addr_t max_addr, int nid)
309{
310 return ___alloc_bootmem_node_nopanic(NODE_DATA(nid), size, align,
311 min_addr, max_addr);
312}
313
314static inline void __init memblock_free_early(
315 phys_addr_t base, phys_addr_t size)
316{
317 free_bootmem(base, size);
318}
319
320static inline void __init memblock_free_early_nid(
321 phys_addr_t base, phys_addr_t size, int nid)
322{
323 free_bootmem_node(NODE_DATA(nid), base, size);
324}
325
326static inline void __init memblock_free_late(
327 phys_addr_t base, phys_addr_t size)
328{
329 free_bootmem_late(base, size);
330}
331#endif /* defined(CONFIG_HAVE_MEMBLOCK) && defined(CONFIG_NO_BOOTMEM) */
332
333#ifdef CONFIG_HAVE_ARCH_ALLOC_REMAP
334extern void *alloc_remap(int nid, unsigned long size);
335#else
336static inline void *alloc_remap(int nid, unsigned long size)
337{
338 return NULL;
339}
340#endif /* CONFIG_HAVE_ARCH_ALLOC_REMAP */
341
342extern void *alloc_large_system_hash(const char *tablename,
343 unsigned long bucketsize,
344 unsigned long numentries,
345 int scale,
346 int flags,
347 unsigned int *_hash_shift,
348 unsigned int *_hash_mask,
349 unsigned long low_limit,
350 unsigned long high_limit);
351
352#define HASH_EARLY 0x00000001 /* Allocating during early boot? */
353#define HASH_SMALL 0x00000002 /* sub-page allocation allowed, min
354 * shift passed via *_hash_shift */
355
356/* Only NUMA needs hash distribution. 64bit NUMA architectures have
357 * sufficient vmalloc space.
358 */
359#if defined(CONFIG_NUMA) && defined(CONFIG_64BIT)
360#define HASHDIST_DEFAULT 1
361#else
362#define HASHDIST_DEFAULT 0
363#endif
364extern int hashdist; /* Distribute hashes across NUMA nodes? */
365
366
367#endif /* _LINUX_BOOTMEM_H */