36 lines
1.1 KiB
C
36 lines
1.1 KiB
C
/*
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* Basic general purpose allocator for managing special purpose memory
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* not managed by the regular kmalloc/kfree interface.
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* Uses for this includes on-device special memory, uncached memory
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* etc.
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*
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* This source code is licensed under the GNU General Public License,
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* Version 2. See the file COPYING for more details.
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*/
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/*
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* General purpose special memory pool descriptor.
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*/
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struct gen_pool {
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rwlock_t lock;
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struct list_head chunks; /* list of chunks in this pool */
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int min_alloc_order; /* minimum allocation order */
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};
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/*
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* General purpose special memory pool chunk descriptor.
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*/
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struct gen_pool_chunk {
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spinlock_t lock;
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struct list_head next_chunk; /* next chunk in pool */
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unsigned long start_addr; /* starting address of memory chunk */
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unsigned long end_addr; /* ending address of memory chunk */
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unsigned long bits[0]; /* bitmap for allocating memory chunk */
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};
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extern struct gen_pool *gen_pool_create(int, int);
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extern int gen_pool_add(struct gen_pool *, unsigned long, size_t, int);
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extern unsigned long gen_pool_alloc(struct gen_pool *, size_t);
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extern void gen_pool_free(struct gen_pool *, unsigned long, size_t);
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