Make DMA transactions snoopable so that CPUs can keep caches up-to-date. This allows dma transactions to be used for operations such as memory copies without any additional cache control operations.
Signed-off-by: Peter Tyser ptyser@xes-inc.com --- drivers/dma/fsl_dma.c | 4 ++-- 1 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/dma/fsl_dma.c b/drivers/dma/fsl_dma.c index b7497b5..572f8b6 100644 --- a/drivers/dma/fsl_dma.c +++ b/drivers/dma/fsl_dma.c @@ -72,8 +72,8 @@ static uint dma_check(void) { void dma_init(void) { volatile fsl_dma_t *dma = &dma_base->dma[0];
- out_be32(&dma->satr, FSL_DMA_SATR_SREAD_NO_SNOOP); - out_be32(&dma->datr, FSL_DMA_DATR_DWRITE_NO_SNOOP); + out_be32(&dma->satr, FSL_DMA_SATR_SREAD_SNOOP); + out_be32(&dma->datr, FSL_DMA_DATR_DWRITE_SNOOP); out_be32(&dma->sr, 0xffffffff); /* clear any errors */ dma_sync(); }