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David Brownell20e99692009-05-07 09:31:42 -07001/*
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 */
24extern void *sram_alloc(size_t len, dma_addr_t *dma);
25extern void sram_free(void *addr, size_t len);
26
Matt Porter983c42b2012-10-05 13:04:43 -040027/* Get the struct gen_pool * for use in platform data */
28extern struct gen_pool *sram_get_gen_pool(void);
29
David Brownell20e99692009-05-07 09:31:42 -070030#endif /* __MACH_SRAM_H */