Add beginning of DSP code (done by Catalin Patulea), but don't enable it

yet as there's no C54xx compiler in the toolchain yet..


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@17547 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 49 insertions, 0 deletions

diff --git a/firmware/target/arm/tms320dm320/dsp/arm.c b/firmware/target/arm/tms320dm320/dsp/arm.c
new file mode 100644
index 0000000000..eedff7d439
--- /dev/null
+++ b/firmware/target/arm/tms320dm320/dsp/arm.c
@@ -0,0 +1,49 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2008 by Catalin Patulea
+ *
+ * All files in this archive are subject to the GNU General Public License.
+ * See the file COPYING in the source tree root for full license agreement.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+
+#include <stdio.h>
+#include "arm.h"
+#include "registers.h"
+#include "ipc.h"
+
+volatile struct ipc_message status;
+
+volatile int acked;
+interrupt void handle_int0(void) {
+    IFR = 1;
+    acked = 1;
+}
+
+void debugf(const char *fmt, ...) {
+    va_list args;
+    va_start(args, fmt);
+    status.msg = MSG_DEBUGF;
+    vsnprintf((char *)status.payload.debugf.buffer, sizeof(status), fmt, args);
+    va_end(args);
+
+    /* Wait until ARM has picked up data. */
+    acked = 0;
+    int_arm();
+    while (!acked) {
+        /* IDLE alone never seems to wake up :( */
+        asm("        IDLE 1");
+        asm("        NOP");
+    }
+    acked = 2;
+}