arch/arm/mach-davinci/sram.h

   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  */
  21 extern void *sram_alloc(size_t len, dma_addr_t *dma);
  22 extern void sram_free(void *addr, size_t len);
  23
  24 /* Get the struct gen_pool * for use in platform data */
  25 extern struct gen_pool *sram_get_gen_pool(void);
  26
  27 #endif /* __MACH_SRAM_H */