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40 lines
1.1 KiB
40 lines
1.1 KiB
/*
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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 code is based on the buddy allocator found in the sym53c8xx_2
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* driver, adapted for general purpose use.
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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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#include <linux/spinlock.h>
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#define ALLOC_MIN_SHIFT 5 /* 32 bytes minimum */
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/*
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* Link between free memory chunks of a given size.
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*/
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struct gen_pool_link {
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struct gen_pool_link *next;
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};
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/*
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* Memory pool descriptor.
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*/
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struct gen_pool {
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spinlock_t lock;
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unsigned long (*get_new_chunk)(struct gen_pool *);
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struct gen_pool *next;
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struct gen_pool_link *h;
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unsigned long private;
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int max_chunk_shift;
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};
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unsigned long gen_pool_alloc(struct gen_pool *poolp, int size);
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void gen_pool_free(struct gen_pool *mp, unsigned long ptr, int size);
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struct gen_pool *gen_pool_create(int nr_chunks, int max_chunk_shift,
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unsigned long (*fp)(struct gen_pool *),
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unsigned long data);
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