1 files changed, 66 insertions, 0 deletions

diff --git a/firmware/target/arm/system-arm.c b/firmware/target/arm/system-arm.c
new file mode 100644
index 0000000000..5c5a18c867
--- /dev/null
+++ b/firmware/target/arm/system-arm.c
@@ -0,0 +1,66 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2006 by Thom Johansen
+ *
+ * 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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+#include "config.h"
+#include "system.h"
+#include <stdio.h>
+#include "lcd.h"
+#include "font.h"
+
+static const char* const uiename[] = {
+    "Undefined instruction",
+    "Prefetch abort",
+    "Data abort",
+    "Divide by zero"
+};
+
+/* Unexpected Interrupt or Exception handler. Currently only deals with
+   exceptions, but will deal with interrupts later.
+ */
+void __attribute__((noreturn)) UIE(unsigned int pc, unsigned int num)
+{
+    char str[32];
+
+    lcd_clear_display();
+#ifdef HAVE_LCD_BITMAP
+    lcd_setfont(FONT_SYSFIXED);
+#endif
+    lcd_puts(0, 0, uiename[num]);
+    snprintf(str, sizeof(str), "at %08x" IF_COP(" (%d)"), pc
+             IF_COP(, CURRENT_CORE));
+    lcd_puts(0, 1, str);
+    lcd_update();
+
+    disable_interrupt(IRQ_FIQ_STATUS);
+
+    system_exception_wait(); /* If this returns, try to reboot */
+    system_reboot();
+    while (1);       /* halt */
+}
+
+/* Needs to be here or gcc won't find it */
+void __attribute__((naked)) __div0(void)
+{
+    asm volatile (
+        "ldr    r0, [sp] \r\n"
+        "mov    r1, #3   \r\n"
+        "b      UIE      \r\n"
+    );
+}