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fsl_dma: Make DMA transactions snoopable

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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>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
This commit is contained in:
Peter Tyser 2009-06-30 17:15:49 -05:00 • committed by Kumar Gala
parent 0d595f76bc
commit 6af015b86b
1 changed files with 2 additions and 2 deletions
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4
drivers/dma/fsl_dma.c
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@ -72,8 +72,8 @@ static uint dma_check(void) {
void dma_init(void) { void dma_init(void) {
volatile fsl_dma_t *dma = &dma_base->dma[0]; volatile fsl_dma_t *dma = &dma_base->dma[0];
out_be32(&dma->satr, FSL_DMA_SATR_SREAD_NO_SNOOP); out_be32(&dma->satr, FSL_DMA_SATR_SREAD_SNOOP);
out_be32(&dma->datr, FSL_DMA_DATR_DWRITE_NO_SNOOP); out_be32(&dma->datr, FSL_DMA_DATR_DWRITE_SNOOP);
out_be32(&dma->sr, 0xffffffff); /* clear any errors */ out_be32(&dma->sr, 0xffffffff); /* clear any errors */
dma_sync(); dma_sync();
} }