[mirror_ubuntu-hirsute-kernel.git] / arch / arm / mach-davinci / sram.h

/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * mach/sram.h - DaVinci simple SRAM allocator
 *
 * Copyright (C) 2009 David Brownell
 */
#ifndef __MACH_SRAM_H
#define __MACH_SRAM_H

/* ARBITRARY:  SRAM allocations are multiples of this 2^N size */
#define SRAM_GRANULARITY	512

/*
 * SRAM allocations return a CPU virtual address, or NULL on error.
 * If a DMA address is requested and the SRAM supports DMA, its
 * mapped address is also returned.
 *
 * Errors include SRAM memory not being available, and requesting
 * DMA mapped SRAM on systems which don't allow that.
 */
extern void *sram_alloc(size_t len, dma_addr_t *dma);
extern void sram_free(void *addr, size_t len);

/* Get the struct gen_pool * for use in platform data */
extern struct gen_pool *sram_get_gen_pool(void);

#endif /* __MACH_SRAM_H */
Commit	Line	Data
d2912cb1	1	/* SPDX-License-Identifier: GPL-2.0-only */
20e9969b DB	2	/*
	3	* mach/sram.h - DaVinci simple SRAM allocator
	4	*
	5	* Copyright (C) 2009 David Brownell
20e9969b DB	6	*/
	7	#ifndef __MACH_SRAM_H
	8	#define __MACH_SRAM_H
	9
	10	/* ARBITRARY: SRAM allocations are multiples of this 2^N size */
	11	#define SRAM_GRANULARITY 512
	12
	13	/*
	14	* SRAM allocations return a CPU virtual address, or NULL on error.
	15	* If a DMA address is requested and the SRAM supports DMA, its
	16	* mapped address is also returned.
	17	*
	18	* Errors include SRAM memory not being available, and requesting
	19	* DMA mapped SRAM on systems which don't allow that.
	20	*/
	21	extern void sram_alloc(size_t len, dma_addr_t dma);
	22	extern void sram_free(void *addr, size_t len);
	23
983c42ba MP	24	/* Get the struct gen_pool * for use in platform data */
	25	extern struct gen_pool *sram_get_gen_pool(void);
	26
20e9969b	27	#endif /* __MACH_SRAM_H */