Function rt_dma_alloc_coherent

components/drivers/include/drivers/dma.h:200–205

        void *cpu_addr, rt_ubase_t dma_handle, rt_ubase_t flags);

rt_inline void *rt_dma_alloc_coherent(struct rt_device *dev, rt_size_t size,
        rt_ubase_t *dma_handle)
{
    return rt_dma_alloc(dev, size, dma_handle,
            RT_DMA_F_NOCACHE | RT_DMA_F_LINEAR);
}

rt_inline void rt_dma_free_coherent(struct rt_device *dev, rt_size_t size,
        void *cpu_addr, rt_ubase_t dma_handle)