PowerPC: mac-io DB-DMA support

This patch adds powermac Descriptor-Based DMA.
It is used by mac-io based IDE, ethernet, sounds and serial devices.

Signed-off-by: Laurent Vivier <Laurent@lvivier.info>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6488 c046a42c-6fe2-441c-8c8c-71466251a162

1 files changed, 41 insertions, 0 deletions

diff --git a/hw/mac_dbdma.h b/hw/mac_dbdma.h
new file mode 100644
index 0000000000..d1a02ed75e
--- /dev/null
+++ b/hw/mac_dbdma.h
@@ -0,0 +1,41 @@
+/*
+ * Copyright (c) 2009 Laurent Vivier
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+typedef struct {
+    void *opaque;
+    void *channel;
+    int len;
+    int is_last;
+    void *buf;
+    int buf_pos;
+    int buf_len;
+} DBDMA_transfer;
+
+typedef int (*DBDMA_transfer_cb)(DBDMA_transfer *info);
+typedef int (*DBDMA_transfer_handler)(DBDMA_transfer *info,
+                                      DBDMA_transfer_cb cb);
+
+void DBDMA_register_channel(void *dbdma, int nchan, qemu_irq irq,
+                            DBDMA_transfer_handler transfer_handler,
+                            void *opaque);
+void DBDMA_schedule(void);
+void* DBDMA_init (int *dbdma_mem_index);