Commit | Line | Data |
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f14f75b8 JS |
1 | /* |
2 | * Basic general purpose allocator for managing special purpose memory | |
3 | * not managed by the regular kmalloc/kfree interface. | |
4 | * Uses for this includes on-device special memory, uncached memory | |
5 | * etc. | |
6 | * | |
f14f75b8 JS |
7 | * This source code is licensed under the GNU General Public License, |
8 | * Version 2. See the file COPYING for more details. | |
9 | */ | |
10 | ||
f14f75b8 | 11 | |
f14f75b8 | 12 | /* |
929f9727 | 13 | * General purpose special memory pool descriptor. |
f14f75b8 | 14 | */ |
929f9727 DN |
15 | struct gen_pool { |
16 | rwlock_t lock; | |
17 | struct list_head chunks; /* list of chunks in this pool */ | |
18 | int min_alloc_order; /* minimum allocation order */ | |
f14f75b8 JS |
19 | }; |
20 | ||
21 | /* | |
929f9727 | 22 | * General purpose special memory pool chunk descriptor. |
f14f75b8 | 23 | */ |
929f9727 | 24 | struct gen_pool_chunk { |
f14f75b8 | 25 | spinlock_t lock; |
929f9727 DN |
26 | struct list_head next_chunk; /* next chunk in pool */ |
27 | unsigned long start_addr; /* starting address of memory chunk */ | |
28 | unsigned long end_addr; /* ending address of memory chunk */ | |
29 | unsigned long bits[0]; /* bitmap for allocating memory chunk */ | |
f14f75b8 JS |
30 | }; |
31 | ||
929f9727 DN |
32 | extern struct gen_pool *gen_pool_create(int, int); |
33 | extern int gen_pool_add(struct gen_pool *, unsigned long, size_t, int); | |
322acc96 | 34 | extern void gen_pool_destroy(struct gen_pool *); |
929f9727 DN |
35 | extern unsigned long gen_pool_alloc(struct gen_pool *, size_t); |
36 | extern void gen_pool_free(struct gen_pool *, unsigned long, size_t); |