linux/arch/arm/mach-davinci/sram.h
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   1/* SPDX-License-Identifier: GPL-2.0-only */
   2/*
   3 * mach/sram.h - DaVinci simple SRAM allocator
   4 *
   5 * Copyright (C) 2009 David Brownell
   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 */
  21extern void *sram_alloc(size_t len, dma_addr_t *dma);
  22extern void sram_free(void *addr, size_t len);
  23
  24/* Get the struct gen_pool * for use in platform data */
  25extern struct gen_pool *sram_get_gen_pool(void);
  26
  27#endif /* __MACH_SRAM_H */
  28