Applied. Thanks.
--Scott
Thomas Chou wrote:
> This function return cache-line aligned allocation which is mapped
> to uncached io region.
>
> Signed-off-by: Thomas Chou <tho...@wytron.com.tw>
> ---
> arch dir reorganized.
>
> arch/nios2/include/asm/dma-mapping.h | 23 +++++++++++++++++++++++
> 1 files changed, 23 insertions(+), 0 deletions(-)
> create mode 100644 arch/nios2/include/asm/dma-mapping.h
>
> diff --git a/arch/nios2/include/asm/dma-mapping.h
> b/arch/nios2/include/asm/dma-mapping.h
> new file mode 100644
> index 0000000..1350e3b
> --- /dev/null
> +++ b/arch/nios2/include/asm/dma-mapping.h
> @@ -0,0 +1,23 @@
> +#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
> + */
> +
> +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);
> +}
> +
> +#endif /* __ASM_NIOS2_DMA_MAPPING_H */
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