Changeset 169 for soft/giet_vm/sys/irq_handler.c

Timestamp:

Jul 17, 2012, 2:39:10 PM (12 years ago)

Author:

alain

Message:

Introducing support for FBDMA (Frame Buffer using DMA)

File:

• soft/giet_vm/sys/irq_handler.c (modified) (1 diff)

soft/giet_vm/sys/irq_handler.c

@@ -86 +86 @@
     volatile unsigned int* dma_address;
 
+    // compute DMA channel address
     dma_address = (unsigned int*)&seg_dma_base + (dma_id * DMA_SPAN);
 
+    // save DMA channel status  
+    _dma_status[dma_id] = dma_address[DMA_LEN]; /* save status */
+
+    // reset DMA channel
     dma_address[DMA_RESET] = 0;                                 /* reset IRQ */
 
-    _dma_status[dma_id] = dma_address[DMA_LEN]; /* save status */
+    // release DMA channel 
     _dma_busy[dma_id] = 0;                      /* release DMA */
 }