28 lines
852 B
C
28 lines
852 B
C
|
/*
|
||
|
|
* 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);
|
||
|
|
|
||
|
|
#endif /* __MACH_SRAM_H */
|