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 <pty...@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();
}
--
1.6.2.1
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