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Diffstat (limited to 'arch/blackfin/include/asm/dma.h')
-rw-r--r--arch/blackfin/include/asm/dma.h10
1 files changed, 9 insertions, 1 deletions
diff --git a/arch/blackfin/include/asm/dma.h b/arch/blackfin/include/asm/dma.h
index e4f7b8043f02..c9a59622e23f 100644
--- a/arch/blackfin/include/asm/dma.h
+++ b/arch/blackfin/include/asm/dma.h
@@ -206,10 +206,16 @@ static inline unsigned long get_dma_curr_addr(unsigned int channel)
static inline void set_dma_sg(unsigned int channel, struct dmasg *sg, int ndsize)
{
+ /* Make sure the internal data buffers in the core are drained
+ * so that the DMA descriptors are completely written when the
+ * DMA engine goes to fetch them below.
+ */
+ SSYNC();
+
+ dma_ch[channel].regs->next_desc_ptr = sg;
dma_ch[channel].regs->cfg =
(dma_ch[channel].regs->cfg & ~(0xf << 8)) |
((ndsize & 0xf) << 8);
- dma_ch[channel].regs->next_desc_ptr = sg;
}
static inline int dma_channel_active(unsigned int channel)
@@ -253,5 +259,7 @@ static inline void clear_dma_irqstat(unsigned int channel)
void *dma_memcpy(void *dest, const void *src, size_t count);
void *safe_dma_memcpy(void *dest, const void *src, size_t count);
void blackfin_dma_early_init(void);
+void early_dma_memcpy(void *dest, const void *src, size_t count);
+void early_dma_memcpy_done(void);
#endif