1#ifndef __CMA_H__
2#define __CMA_H__
3
4/*
5 * There is always at least global CMA area and a few optional
6 * areas configured in kernel .config.
7 */
8#ifdef CONFIG_CMA_AREAS
9#define MAX_CMA_AREAS	(1 + CONFIG_CMA_AREAS)
10
11#else
12#define MAX_CMA_AREAS	(0)
13
14#endif
15
16struct cma;
17
18extern unsigned long totalcma_pages;
19extern phys_addr_t cma_get_base(const struct cma *cma);
20extern unsigned long cma_get_size(const struct cma *cma);
21
22extern int __init cma_declare_contiguous(phys_addr_t base,
23			phys_addr_t size, phys_addr_t limit,
24			phys_addr_t alignment, unsigned int order_per_bit,
25			bool fixed, struct cma **res_cma);
26extern int cma_init_reserved_mem(phys_addr_t base, phys_addr_t size,
27					unsigned int order_per_bit,
28					struct cma **res_cma);
29extern struct page *cma_alloc(struct cma *cma, unsigned int count, unsigned int align);
30extern bool cma_release(struct cma *cma, const struct page *pages, unsigned int count);
31#endif
32