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 *
7 * This source code is licensed under the GNU General Public License,
8 * Version 2.  See the file COPYING for more details.
9 */
10
11
12/*
13 *  General purpose special memory pool descriptor.
14 */
15struct 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 */
19};
20
21/*
22 *  General purpose special memory pool chunk descriptor.
23 */
24struct gen_pool_chunk {
25	spinlock_t lock;
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 */
30};
31
32extern struct gen_pool *gen_pool_create(int, int);
33extern int gen_pool_add(struct gen_pool *, unsigned long, size_t, int);
34extern void gen_pool_destroy(struct gen_pool *);
35extern unsigned long gen_pool_alloc(struct gen_pool *, size_t);
36extern void gen_pool_free(struct gen_pool *, unsigned long, size_t);
37