--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/sh4/dmac.h	Wed Sep 12 09:16:47 2007 +0000
@@ -0,0 +1,62 @@
+/**
+ * $Id: dmac.h,v 1.1 2006-01-02 14:48:29 nkeynes Exp $
+ *
+ * SH4 onboard DMA controller (DMAC) definitions.
+ *
+ * Copyright (c) 2005 Nathan Keynes.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef dream_sh4dmac_H
+#define dream_sh4dmac_H 1
+
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* External DREQ. Note only used for DMA memory-to-memory - for single 
+ * address transfers the device uses DMAC_get_buffer/DMAC_put_buffer.
+ */
+#define DMAC_EXTERNAL 0 
+#define DMAC_SCI_TDE 1  /* SCI Transmit data empty */
+#define DMAC_SCI_RDF 2  /* SCI Receive data full */
+#define DMAC_SCIF_TDE 3 /* SCIF Transmit data empty */
+#define DMAC_SCIF_RDF 4 /* SCIF Receive data full */
+#define DMAC_TMU_ICI 5  /* TMU Input capture interrupt (not used?) */
+
+/**
+ * Trigger a DMAC transfer by asserting one of the above DMA request lines
+ * (from the onboard peripherals). Actual transfer is dependent on the 
+ * relevant channel configuration.
+ */
+void DMAC_trigger( int dmac_trigger );
+
+/**
+ * Execute a memory-to-external-device transfer. Copies data into the supplied
+ * buffer up to a maximum of bytecount bytes. 
+ * @return Actual number of bytes copied.
+ */
+uint32_t DMAC_get_buffer( int channel, char *buf, uint32_t bytecount );
+
+/**
+ * execute an external-device-to-memory transfer. Copies data from the 
+ * supplied buffer into memory up to a maximum of bytecount bytes. 
+ * @return Actual number of bytes copied.
+ */
+uint32_t DMAC_put_buffer( int channel, char *buf, uint32_t bytecount );
+
+#ifdef __cplusplus
+}
+#endif
+#endif