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 * highest possible page
24 */
25extern unsigned long long max_possible_pfn;
26
27#ifndef CONFIG_NO_BOOTMEM
28/*
29 * node_bootmem_map is a map pointer - the bits represent all physical
30 * memory pages (including holes) on the node.
31 */
32typedef struct bootmem_data {
33 unsigned long node_min_pfn;
34 unsigned long node_low_pfn;
35 void *node_bootmem_map;
36 unsigned long last_end_off;
37 unsigned long hint_idx;
38 struct list_head list;
39} bootmem_data_t;
40
41extern bootmem_data_t bootmem_node_data[];
42#endif
43
44extern unsigned long bootmem_bootmap_pages(unsigned long);
45
46extern unsigned long init_bootmem_node(pg_data_t *pgdat,
47 unsigned long freepfn,
48 unsigned long startpfn,
49 unsigned long endpfn);
50extern unsigned long init_bootmem(unsigned long addr, unsigned long memend);
51
52extern unsigned long free_all_bootmem(void);
53extern void reset_node_managed_pages(pg_data_t *pgdat);
54extern void reset_all_zones_managed_pages(void);
55
56extern void free_bootmem_node(pg_data_t *pgdat,
57 unsigned long addr,
58 unsigned long size);
59extern void free_bootmem(unsigned long physaddr, unsigned long size);
60extern void free_bootmem_late(unsigned long physaddr, unsigned long size);
61
62/*
63 * Flags for reserve_bootmem (also if CONFIG_HAVE_ARCH_BOOTMEM_NODE,
64 * the architecture-specific code should honor this).
65 *
66 * If flags is BOOTMEM_DEFAULT, then the return value is always 0 (success).
67 * If flags contains BOOTMEM_EXCLUSIVE, then -EBUSY is returned if the memory
68 * already was reserved.
69 */
70#define BOOTMEM_DEFAULT 0
71#define BOOTMEM_EXCLUSIVE (1<<0)
72
73extern int reserve_bootmem(unsigned long addr,
74 unsigned long size,
75 int flags);
76extern int reserve_bootmem_node(pg_data_t *pgdat,
77 unsigned long physaddr,
78 unsigned long size,
79 int flags);
80
81extern void *__alloc_bootmem(unsigned long size,
82 unsigned long align,
83 unsigned long goal);
84extern void *__alloc_bootmem_nopanic(unsigned long size,
85 unsigned long align,
86 unsigned long goal) __malloc;
87extern void *__alloc_bootmem_node(pg_data_t *pgdat,
88 unsigned long size,
89 unsigned long align,
90 unsigned long goal) __malloc;
91void *__alloc_bootmem_node_high(pg_data_t *pgdat,
92 unsigned long size,
93 unsigned long align,
94 unsigned long goal) __malloc;
95extern void *__alloc_bootmem_node_nopanic(pg_data_t *pgdat,
96 unsigned long size,
97 unsigned long align,
98 unsigned long goal) __malloc;
99void *___alloc_bootmem_node_nopanic(pg_data_t *pgdat,
100 unsigned long size,
101 unsigned long align,
102 unsigned long goal,
103 unsigned long limit) __malloc;
104extern void *__alloc_bootmem_low(unsigned long size,
105 unsigned long align,
106 unsigned long goal) __malloc;
107void *__alloc_bootmem_low_nopanic(unsigned long size,
108 unsigned long align,
109 unsigned long goal) __malloc;
110extern void *__alloc_bootmem_low_node(pg_data_t *pgdat,
111 unsigned long size,
112 unsigned long align,
113 unsigned long goal) __malloc;
114
115#ifdef CONFIG_NO_BOOTMEM
116/* We are using top down, so it is safe to use 0 here */
117#define BOOTMEM_LOW_LIMIT 0
118#else
119#define BOOTMEM_LOW_LIMIT __pa(MAX_DMA_ADDRESS)
120#endif
121
122#define alloc_bootmem(x) \
123 __alloc_bootmem(x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
124#define alloc_bootmem_align(x, align) \
125 __alloc_bootmem(x, align, BOOTMEM_LOW_LIMIT)
126#define alloc_bootmem_nopanic(x) \
127 __alloc_bootmem_nopanic(x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
128#define alloc_bootmem_pages(x) \
129 __alloc_bootmem(x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
130#define alloc_bootmem_pages_nopanic(x) \
131 __alloc_bootmem_nopanic(x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
132#define alloc_bootmem_node(pgdat, x) \
133 __alloc_bootmem_node(pgdat, x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
134#define alloc_bootmem_node_nopanic(pgdat, x) \
135 __alloc_bootmem_node_nopanic(pgdat, x, SMP_CACHE_BYTES, BOOTMEM_LOW_LIMIT)
136#define alloc_bootmem_pages_node(pgdat, x) \
137 __alloc_bootmem_node(pgdat, x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
138#define alloc_bootmem_pages_node_nopanic(pgdat, x) \
139 __alloc_bootmem_node_nopanic(pgdat, x, PAGE_SIZE, BOOTMEM_LOW_LIMIT)
140
141#define alloc_bootmem_low(x) \
142 __alloc_bootmem_low(x, SMP_CACHE_BYTES, 0)
143#define alloc_bootmem_low_pages_nopanic(x) \
144 __alloc_bootmem_low_nopanic(x, PAGE_SIZE, 0)
145#define alloc_bootmem_low_pages(x) \
146 __alloc_bootmem_low(x, PAGE_SIZE, 0)
147#define alloc_bootmem_low_pages_node(pgdat, x) \
148 __alloc_bootmem_low_node(pgdat, x, PAGE_SIZE, 0)
149
150
151#if defined(CONFIG_HAVE_MEMBLOCK) && defined(CONFIG_NO_BOOTMEM)
152
153/* FIXME: use MEMBLOCK_ALLOC_* variants here */
154#define BOOTMEM_ALLOC_ACCESSIBLE 0
155#define BOOTMEM_ALLOC_ANYWHERE (~(phys_addr_t)0)
156
157/* FIXME: Move to memblock.h at a point where we remove nobootmem.c */
158void *memblock_virt_alloc_try_nid_nopanic(phys_addr_t size,
159 phys_addr_t align, phys_addr_t min_addr,
160 phys_addr_t max_addr, int nid);
161void *memblock_virt_alloc_try_nid(phys_addr_t size, phys_addr_t align,
162 phys_addr_t min_addr, phys_addr_t max_addr, int nid);
163void __memblock_free_early(phys_addr_t base, phys_addr_t size);
164void __memblock_free_late(phys_addr_t base, phys_addr_t size);
165
166static inline void * __init memblock_virt_alloc(
167 phys_addr_t size, phys_addr_t align)
168{
169 return memblock_virt_alloc_try_nid(size, align, BOOTMEM_LOW_LIMIT,
170 BOOTMEM_ALLOC_ACCESSIBLE,
171 NUMA_NO_NODE);
172}
173
174static inline void * __init memblock_virt_alloc_nopanic(
175 phys_addr_t size, phys_addr_t align)
176{
177 return memblock_virt_alloc_try_nid_nopanic(size, align,
178 BOOTMEM_LOW_LIMIT,
179 BOOTMEM_ALLOC_ACCESSIBLE,
180 NUMA_NO_NODE);
181}
182
183#ifndef ARCH_LOW_ADDRESS_LIMIT
184#define ARCH_LOW_ADDRESS_LIMIT 0xffffffffUL
185#endif
186
187static inline void * __init memblock_virt_alloc_low(
188 phys_addr_t size, phys_addr_t align)
189{
190 return memblock_virt_alloc_try_nid(size, align,
191 BOOTMEM_LOW_LIMIT,
192 ARCH_LOW_ADDRESS_LIMIT,
193 NUMA_NO_NODE);
194}
195static inline void * __init memblock_virt_alloc_low_nopanic(
196 phys_addr_t size, phys_addr_t align)
197{
198 return memblock_virt_alloc_try_nid_nopanic(size, align,
199 BOOTMEM_LOW_LIMIT,
200 ARCH_LOW_ADDRESS_LIMIT,
201 NUMA_NO_NODE);
202}
203
204static inline void * __init memblock_virt_alloc_from_nopanic(
205 phys_addr_t size, phys_addr_t align, phys_addr_t min_addr)
206{
207 return memblock_virt_alloc_try_nid_nopanic(size, align, min_addr,
208 BOOTMEM_ALLOC_ACCESSIBLE,
209 NUMA_NO_NODE);
210}
211
212static inline void * __init memblock_virt_alloc_node(
213 phys_addr_t size, int nid)
214{
215 return memblock_virt_alloc_try_nid(size, 0, BOOTMEM_LOW_LIMIT,
216 BOOTMEM_ALLOC_ACCESSIBLE, nid);
217}
218
219static inline void * __init memblock_virt_alloc_node_nopanic(
220 phys_addr_t size, int nid)
221{
222 return memblock_virt_alloc_try_nid_nopanic(size, 0, BOOTMEM_LOW_LIMIT,
223 BOOTMEM_ALLOC_ACCESSIBLE,
224 nid);
225}
226
227static inline void __init memblock_free_early(
228 phys_addr_t base, phys_addr_t size)
229{
230 __memblock_free_early(base, size);
231}
232
233static inline void __init memblock_free_early_nid(
234 phys_addr_t base, phys_addr_t size, int nid)
235{
236 __memblock_free_early(base, size);
237}
238
239static inline void __init memblock_free_late(
240 phys_addr_t base, phys_addr_t size)
241{
242 __memblock_free_late(base, size);
243}
244
245#else
246
247#define BOOTMEM_ALLOC_ACCESSIBLE 0
248
249
250/* Fall back to all the existing bootmem APIs */
251static inline void * __init memblock_virt_alloc(
252 phys_addr_t size, phys_addr_t align)
253{
254 if (!align)
255 align = SMP_CACHE_BYTES;
256 return __alloc_bootmem(size, align, BOOTMEM_LOW_LIMIT);
257}
258
259static inline void * __init memblock_virt_alloc_nopanic(
260 phys_addr_t size, phys_addr_t align)
261{
262 if (!align)
263 align = SMP_CACHE_BYTES;
264 return __alloc_bootmem_nopanic(size, align, BOOTMEM_LOW_LIMIT);
265}
266
267static inline void * __init memblock_virt_alloc_low(
268 phys_addr_t size, phys_addr_t align)
269{
270 if (!align)
271 align = SMP_CACHE_BYTES;
272 return __alloc_bootmem_low(size, align, 0);
273}
274
275static inline void * __init memblock_virt_alloc_low_nopanic(
276 phys_addr_t size, phys_addr_t align)
277{
278 if (!align)
279 align = SMP_CACHE_BYTES;
280 return __alloc_bootmem_low_nopanic(size, align, 0);
281}
282
283static inline void * __init memblock_virt_alloc_from_nopanic(
284 phys_addr_t size, phys_addr_t align, phys_addr_t min_addr)
285{
286 return __alloc_bootmem_nopanic(size, align, min_addr);
287}
288
289static inline void * __init memblock_virt_alloc_node(
290 phys_addr_t size, int nid)
291{
292 return __alloc_bootmem_node(NODE_DATA(nid), size, SMP_CACHE_BYTES,
293 BOOTMEM_LOW_LIMIT);
294}
295
296static inline void * __init memblock_virt_alloc_node_nopanic(
297 phys_addr_t size, int nid)
298{
299 return __alloc_bootmem_node_nopanic(NODE_DATA(nid), size,
300 SMP_CACHE_BYTES,
301 BOOTMEM_LOW_LIMIT);
302}
303
304static inline void * __init memblock_virt_alloc_try_nid(phys_addr_t size,
305 phys_addr_t align, phys_addr_t min_addr, phys_addr_t max_addr, int nid)
306{
307 return __alloc_bootmem_node_high(NODE_DATA(nid), size, align,
308 min_addr);
309}
310
311static inline void * __init memblock_virt_alloc_try_nid_nopanic(
312 phys_addr_t size, phys_addr_t align,
313 phys_addr_t min_addr, phys_addr_t max_addr, int nid)
314{
315 return ___alloc_bootmem_node_nopanic(NODE_DATA(nid), size, align,
316 min_addr, max_addr);
317}
318
319static inline void __init memblock_free_early(
320 phys_addr_t base, phys_addr_t size)
321{
322 free_bootmem(base, size);
323}
324
325static inline void __init memblock_free_early_nid(
326 phys_addr_t base, phys_addr_t size, int nid)
327{
328 free_bootmem_node(NODE_DATA(nid), base, size);
329}
330
331static inline void __init memblock_free_late(
332 phys_addr_t base, phys_addr_t size)
333{
334 free_bootmem_late(base, size);
335}
336#endif /* defined(CONFIG_HAVE_MEMBLOCK) && defined(CONFIG_NO_BOOTMEM) */
337
338#ifdef CONFIG_HAVE_ARCH_ALLOC_REMAP
339extern void *alloc_remap(int nid, unsigned long size);
340#else
341static inline void *alloc_remap(int nid, unsigned long size)
342{
343 return NULL;
344}
345#endif /* CONFIG_HAVE_ARCH_ALLOC_REMAP */
346
347extern void *alloc_large_system_hash(const char *tablename,
348 unsigned long bucketsize,
349 unsigned long numentries,
350 int scale,
351 int flags,
352 unsigned int *_hash_shift,
353 unsigned int *_hash_mask,
354 unsigned long low_limit,
355 unsigned long high_limit);
356
357#define HASH_EARLY 0x00000001 /* Allocating during early boot? */
358#define HASH_SMALL 0x00000002 /* sub-page allocation allowed, min
359 * shift passed via *_hash_shift */
360
361/* Only NUMA needs hash distribution. 64bit NUMA architectures have
362 * sufficient vmalloc space.
363 */
364#ifdef CONFIG_NUMA
365#define HASHDIST_DEFAULT IS_ENABLED(CONFIG_64BIT)
366extern int hashdist; /* Distribute hashes across NUMA nodes? */
367#else
368#define hashdist (0)
369#endif
370
371
372#endif /* _LINUX_BOOTMEM_H */