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

/*
 * mach/sram.h - DaVinci simple SRAM allocator
 *
 * Copyright (C) 2009 David Brownell
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
#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
20e9969b DB	1	/*
	2	* mach/sram.h - DaVinci simple SRAM allocator
	3	*
	4	* Copyright (C) 2009 David Brownell
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License version 2 as
	8	* published by the Free Software Foundation.
	9	*/
	10	#ifndef __MACH_SRAM_H
	11	#define __MACH_SRAM_H
	12
	13	/* ARBITRARY: SRAM allocations are multiples of this 2^N size */
	14	#define SRAM_GRANULARITY 512
	15
	16	/*
	17	* SRAM allocations return a CPU virtual address, or NULL on error.
	18	* If a DMA address is requested and the SRAM supports DMA, its
	19	* mapped address is also returned.
	20	*
	21	* Errors include SRAM memory not being available, and requesting
	22	* DMA mapped SRAM on systems which don't allow that.
	23	*/
	24	extern void sram_alloc(size_t len, dma_addr_t dma);
	25	extern void sram_free(void *addr, size_t len);
	26
983c42ba MP	27	/* Get the struct gen_pool * for use in platform data */
	28	extern struct gen_pool *sram_get_gen_pool(void);
	29
20e9969b	30	#endif /* __MACH_SRAM_H */