1 files changed, 100 insertions, 0 deletions
diff --git a/cpu/mpc824x/drivers/dma_export.h b/cpu/mpc824x/drivers/dma_export.h
new file mode 100644
index 0000000..cb750dd
--- /dev/null
+++ b/cpu/mpc824x/drivers/dma_export.h
@@ -0,0 +1,100 @@
+#ifndef DMA_EXPORT_H
+#define DMA_EXPORT_H
+
+/****************************************************
+ * $Id:
+ *
+ * Copyright Motorola 1999
+ *
+ * $Log:
+ *
+ ****************************************************/
+
+/* These are the defined return values for the DMA_* functions.
+ * Any non-zero value indicates failure.  Failure modes can be added for
+ * more detailed error reporting.
+ */
+typedef enum _dma_status
+{
+ DMA_SUCCESS     = 0,
+ DMA_ERROR,
+} DMA_Status;
+
+/* These are the defined channel transfer types.  */
+typedef enum _dma_transfer_types
+{
+	DMA_M2M =  0,	/* local memory to local memory */
+	DMA_M2P =  1,	/* local memory to PCI */
+	DMA_P2M =  2,	/* PCI to local memory */
+	DMA_P2P =  3,	/* PCI to PCI */
+} DMA_TRANSFER_TYPE;
+
+typedef enum _dma_interrupt_steer
+{
+	DMA_INT_STEER_LOCAL =  0, /* steer DMA int to local processor */
+	DMA_INT_STEER_PCI = 1,    /* steer DMA int to PCI bus through INTA_ */
+} DMA_INTERRUPT_STEER;
+
+typedef enum _dma_channel
+{
+	DMA_CHN_0 =  0, /* kahlua has two dma channels: 0 and 1 */
+	DMA_CHN_1 =  1,
+} DMA_CHANNEL;
+
+typedef enum _dma_snoop_mode
+{
+	DMA_SNOOP_DISABLE =  0,
+	DMA_SNOOP_ENABLE = 1,
+} DMA_SNOOP_MODE;
+
+/******************** App. API ********************
+ * The application API is for user level application
+ * to use the functionality provided by DMA driver.
+ * This is a "generic" DMA interface, it should contain
+ * nothing specific to the Kahlua implementation.
+ * Only the generic functions are exported by the library.
+ *
+ * Note: Its App.s responsibility to swap the data
+ *       byte. In our API, we currently transfer whatever
+ *       we are given - Big/Little Endian.  This could
+ *       become part of the DMA config, though.
+ **************************************************/
+
+
+/*  Initialize DMA unit with the following:
+ *  optional pointer to application layer print function
+ *
+ *  These parameters may be added:
+ *  ???
+ *  Interrupt enables, modes, etc. are set for each transfer.
+ *
+ *  This function must be called before DMA unit can be used.
+ */
+extern DMA_Status DMA_Initialize(
+        int (*app_print_function)(char *,...)); /* pointer to optional "printf"
+                                                 * provided by application
+                                                 */
+
+/* Perform the DMA transfer, only direct mode is currently implemented.
+ * At this point, I think it would be better to define a different
+ * function for chaining mode.
+ * Also, I'm not sure if it is appropriate to have the "generic" API
+ * accept snoop and int_steer parameters.  The DINK user interface allows
+ * them, so for now I'll leave them.
+ *
+ * int_steer controls DMA interrupt steering to PCI or local processor
+ * type is the type of transfer: M2M, M2P, P2M, P2P
+ * source is the source address of the data
+ * dest is the destination address of the data
+ * len is the length of data to transfer
+ * channel is the DMA channel to use for the transfer
+ * snoop is the snoop enable control
+ */
+extern DMA_Status DMA_direct_transfer( DMA_INTERRUPT_STEER int_steer,
+                                       DMA_TRANSFER_TYPE type,
+                                       unsigned int source,
+                                       unsigned int dest,
+                                       unsigned int len,
+                                       DMA_CHANNEL channel,
+                                       DMA_SNOOP_MODE snoop);
+#endif