f8fc109960
repo: https://github.com/u-boot/u-boot commit: d80bb749fab53da72c4a0e09b8c2d2aaa3103c91 Change-Id: Ie6434426e1ec15bc08bb1832798e371f3fd5fb29
25 lines
553 B
C
25 lines
553 B
C
#ifndef __ASM_NIOS2_DMA_MAPPING_H
|
|
#define __ASM_NIOS2_DMA_MAPPING_H
|
|
|
|
#include <memalign.h>
|
|
#include <asm/io.h>
|
|
|
|
/*
|
|
* dma_alloc_coherent() return cache-line aligned allocation which is mapped
|
|
* to uncached io region.
|
|
*/
|
|
static inline void *dma_alloc_coherent(size_t len, unsigned long *handle)
|
|
{
|
|
unsigned long addr = (unsigned long)malloc_cache_aligned(len);
|
|
|
|
if (!addr)
|
|
return NULL;
|
|
|
|
invalidate_dcache_range(addr, addr + len);
|
|
if (handle)
|
|
*handle = addr;
|
|
|
|
return map_physmem(addr, len, MAP_NOCACHE);
|
|
}
|
|
#endif /* __ASM_NIOS2_DMA_MAPPING_H */
|