DMA_RB_ENABLE
tmp &= ~DMA_RB_ENABLE;
tmp &= ~DMA_RB_ENABLE;
tmp &= ~DMA_RB_ENABLE;
tmp &= ~DMA_RB_ENABLE;
rb_cntl &= ~DMA_RB_ENABLE;
rb_cntl &= ~DMA_RB_ENABLE;
WREG32(DMA_RB_CNTL + reg_offset, rb_cntl | DMA_RB_ENABLE);
tmp &= ~DMA_RB_ENABLE;
tmp &= ~DMA_RB_ENABLE;
rb_cntl &= ~DMA_RB_ENABLE;
WREG32(DMA_RB_CNTL, rb_cntl | DMA_RB_ENABLE);
tmp &= ~DMA_RB_ENABLE;
tmp &= ~DMA_RB_ENABLE;
tmp &= ~DMA_RB_ENABLE;
tmp &= ~DMA_RB_ENABLE;