leandrof/u-boot
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

nios2: convert dma_alloc_coherent to use malloc_cache_aligned

Browse Source 
Convert dma_alloc_coherent to use memalign.

Signed-off-by: Thomas Chou <thomas@wytron.com.tw>
Reviewed-by: Marek Vasut <marex@denx.de>
This commit is contained in:
Thomas Chou 2015-10-18 20:03:53 +08:00
parent b8112091bb
commit 7cacb64a35
1 changed files with 16 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

31
arch/nios2/include/asm/dma-mapping.h
View File

@ -1,23 +1,24 @@
#ifndef __ASM_NIOS2_DMA_MAPPING_H
#define __ASM_NIOS2_DMA_MAPPING_H
/* dma_alloc_coherent() return cache-line aligned allocation which is mapped
* to uncached io region.
*
* IO_REGION_BASE should be defined in board config header file
* 0x80000000 for nommu, 0xe0000000 for mmu
*/
#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)
{
void *addr = malloc(len + CONFIG_SYS_DCACHELINE_SIZE);
if (!addr)
return 0;
flush_dcache((unsigned long)addr, len + CONFIG_SYS_DCACHELINE_SIZE);
*handle = ((unsigned long)addr +
(CONFIG_SYS_DCACHELINE_SIZE - 1)) &
~(CONFIG_SYS_DCACHELINE_SIZE - 1) & ~(IO_REGION_BASE);
return (void *)(*handle | IO_REGION_BASE);
}
unsigned long addr = (unsigned long)malloc_cache_aligned(len);
if (!addr)
return NULL;
invalidate_dcache_range(addr, addr + len);
if (handle)
*handle = addr;
return ioremap(addr, len);
}
#endif /* __ASM_NIOS2_DMA_MAPPING_H */