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

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

hw/mac_dbdma.h

+/*
+ * 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);

hw/ppc_chrp.c

@@ -25,6 +25,7 @@
 #include "hw.h"
 #include "ppc.h"
 #include "ppc_mac.h"
+#include "mac_dbdma.h"
 #include "nvram.h"
 #include "pc.h"
 #include "pci.h"
@@ -86,6 +87,7 @@ static void ppc_core99_init (ram_addr_t ram_size, int vga_ram_size,
     int ppc_boot_device;
     int index;
     BlockDriverState *hd[MAX_IDE_BUS * MAX_IDE_DEVS];
+    void *dbdma;
 
     linux_boot = (kernel_filename != NULL);
 
@@ -280,6 +282,7 @@ static void ppc_core99_init (ram_addr_t ram_size, int vga_ram_size,
         else
             hd[i] = NULL;
     }
+    dbdma = DBDMA_init(&dbdma_mem_index);
 #if 1
     ide_mem_index[0] = pmac_ide_init(&hd[0], pic[0x13]);
     ide_mem_index[1] = pmac_ide_init(&hd[2], pic[0x14]);
@@ -292,7 +295,6 @@ static void ppc_core99_init (ram_addr_t ram_size, int vga_ram_size,
     adb_kbd_init(&adb_bus);
     adb_mouse_init(&adb_bus);
 
-    dbdma_init(&dbdma_mem_index);
 
     macio_init(pci_bus, 0x0022, 0, pic_mem_index, dbdma_mem_index,
                cuda_mem_index, NULL, 2, ide_mem_index, escc_mem_index);

hw/ppc_mac.h

@@ -39,9 +39,6 @@
 
 #define ESCC_CLOCK 3686400
 
-/* DBDMA */
-void dbdma_init (int *dbdma_mem_index);
-
 /* Cuda */
 void cuda_init (int *cuda_mem_index, qemu_irq irq);
 

hw/ppc_oldworld.c

@@ -25,6 +25,7 @@
 #include "hw.h"
 #include "ppc.h"
 #include "ppc_mac.h"
+#include "mac_dbdma.h"
 #include "nvram.h"
 #include "pc.h"
 #include "sysemu.h"
@@ -132,6 +133,7 @@ static void ppc_heathrow_init (ram_addr_t ram_size, int vga_ram_size,
     BlockDriverState *hd[MAX_IDE_BUS * MAX_IDE_DEVS];
     int index;
     void *fw_cfg;
+    void *dbdma;
 
     linux_boot = (kernel_filename != NULL);
 
@@ -343,6 +345,9 @@ static void ppc_heathrow_init (ram_addr_t ram_size, int vga_ram_size,
         hd[1] = NULL;
     else
         hd[1] =  drives_table[index].bdrv;
+
+    dbdma = DBDMA_init(&dbdma_mem_index);
+
     ide_mem_index[0] = -1;
     ide_mem_index[1] = pmac_ide_init(hd, pic[0x0D]);
 
@@ -355,8 +360,6 @@ static void ppc_heathrow_init (ram_addr_t ram_size, int vga_ram_size,
     nvr = macio_nvram_init(&nvram_mem_index, 0x2000);
     pmac_format_nvram_partition(nvr, 0x2000);
 
-    dbdma_init(&dbdma_mem_index);
-
     macio_init(pci_bus, 0x0010, 1, pic_mem_index, dbdma_mem_index,
                cuda_mem_index, nvr, 2, ide_mem_index, escc_mem_index);