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 */ 24extern void *sram_alloc(size_t len, dma_addr_t *dma); 25extern void sram_free(void *addr, size_t len); 26 27#endif /* __MACH_SRAM_H */ 28