S_DMA_LOW_WATERMARK
#define M_DMA_LOW_WATERMARK _SB_MAKEMASK(16,S_DMA_LOW_WATERMARK)
#define V_DMA_LOW_WATERMARK(x) _SB_MAKEVALUE(x,S_DMA_LOW_WATERMARK)
#define G_DMA_LOW_WATERMARK(x) _SB_GETVALUE(x,S_DMA_LOW_WATERMARK,M_DMA_LOW_WATERMARK)