X-Git-Url: https://git.ucc.asn.au/?a=blobdiff_plain;f=Kernel%2Fdrv%2Fdma.c;h=dd8e88f7069642ccfd0477a1f97d5cbe272c0eea;hb=c967d91a4794ec9c0ec7dab438c033f4c0b49952;hp=750b180d6f686f4d04b7824a4063152ed3e047bb;hpb=1e25b20fd5d119d3b5673d6a31f60b2da676de98;p=tpg%2Facess2.git

diff --git a/Kernel/drv/dma.c b/Kernel/drv/dma.c
index 750b180d..dd8e88f7 100644
--- a/Kernel/drv/dma.c
+++ b/Kernel/drv/dma.c
@@ -20,9 +20,10 @@ typedef struct
 } t_dmaChannel;
 
 // === PROTOTYPES ===
- int	DMA_Install();
+ int	DMA_Install(char **Arguments);
 void	DMA_SetChannel(int Channel, int length, int read);
  int	DMA_ReadData(int channel, int count, void *buffer);
+ int	DMA_WriteData(int channel, int count, const void *buffer);
 
 // === CONSTANTS ===
 const Uint8 cMASKPORT [8] = { 0x0A, 0x0A, 0x0A, 0x0A, 0xD4, 0xD4, 0xD4, 0xD4 };
@@ -39,10 +40,10 @@ t_dmaChannel	dma_channels[8];
 
 // === CODE ===
 /**
- * \fn int DMA_Install()
  * \brief Initialise DMA channels
+ * \param Arguments	Arguments passed at boot time
  */
-int DMA_Install()
+int DMA_Install(char **Arguments)
 {
 	Uint	i;
 	for(i=8;i--;)
@@ -105,3 +106,19 @@ int DMA_ReadData(int channel, int count, void *buffer)
 	memcpy(buffer, dma_addresses[channel], count);
 	return 0;
 }
+
+/**
+ * \fn void DMA_WriteData(int channel, int count, void *buffer)
+ * \brief Write data to a DMA buffer
+ */
+int DMA_WriteData(int channel, int count, const void *buffer)
+{
+	if(channel < 0 || channel > 7)
+		return -1;
+	if(count < 0 || count > DMA_SIZE)
+		return -2;
+	
+	memcpy(dma_addresses[channel], buffer, count);
+	
+	return 0;
+}