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genalloc:support allocating specific region

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Add new algo for genalloc, it reserve a specific region of
memory

Signed-off-by: Zhao Qiang <qiang.zhao@freescale.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>
This commit is contained in:
Zhao Qiang
2015-11-30 10:48:53 +08:00
committed by Scott Wood
parent de2dd0eb30
commit b26981c8f7
2 changed files with 43 additions and 0 deletions
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11
include/linux/genalloc.h
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@@ -84,6 +84,13 @@ struct genpool_data_align {
int align; /* alignment by bytes for starting address */
};
/*
* gen_pool data descriptor for gen_pool_fixed_alloc.
*/
struct genpool_data_fixed {
unsigned long offset; /* The offset of the specific region */
};
extern struct gen_pool *gen_pool_create(int, int);
extern phys_addr_t gen_pool_virt_to_phys(struct gen_pool *pool, unsigned long);
extern int gen_pool_add_virt(struct gen_pool *, unsigned long, phys_addr_t,
@@ -124,6 +131,10 @@ extern unsigned long gen_pool_first_fit(unsigned long *map, unsigned long size,
unsigned long start, unsigned int nr, void *data,
struct gen_pool *pool);
extern unsigned long gen_pool_fixed_alloc(unsigned long *map,
unsigned long size, unsigned long start, unsigned int nr,
void *data, struct gen_pool *pool);
extern unsigned long gen_pool_first_fit_align(unsigned long *map,
unsigned long size, unsigned long start, unsigned int nr,
void *data, struct gen_pool *pool);