[m68k] Add Freescale Coldfire V4E Architecture support

- Added m68k vector, exception & interrupt handlers
- Added m68k macros to access m68k movec registers
- Added Coldfire support code (MultiChannelDMA)
- Added board support for phytec phyCore-MCF baseboard
- Added board support for konzeptpark MCB2 prototype

Signed-off-by: Carsten Schlote <schlote@vahanus.net>

1 files changed, 45 insertions, 0 deletions

diff --git a/arch/m68k/mach-mcfv4e/mcf_reset_cpu.c b/arch/m68k/mach-mcfv4e/mcf_reset_cpu.c
new file mode 100644
index 0000000000..5a3368f901
--- /dev/null
+++ b/arch/m68k/mach-mcfv4e/mcf_reset_cpu.c
@@ -0,0 +1,45 @@
+/*
+ * Copyright (c) 2008 Carsten Schlote <c.schlote@konzeptpark.de>
+ * See file CREDITS for list of people who contributed to this project.
+ *
+ * This file is part of U-Boot V2.
+ *
+ * U-Boot V2 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 3 of the License, or
+ * (at your option) any later version.
+ *
+ * U-Boot V2 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with U-Boot V2.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/** @file
+ *  Implements a watchdog triggered reset for V4e Coldfire cores
+ */
+#include <common.h>
+#include <asm/arch/mcf54xx-regs.h>
+
+/**
+ * Reset the cpu by setting up the watchdog timer and let it time out
+ */
+void reset_cpu (ulong ignored)
+{
+        while ( ignored ) { ; };
+
+	/* Disable watchdog and set Time-Out field to minimum timeout value */
+	MCF_GPT_GMS0 = 0;
+	MCF_GPT_GCIR0 =  MCF_GPT_GCIR_PRE(1) | MCF_GPT_GCIR_CNT(0xffff);
+
+	/* Enable watchdog */
+	MCF_GPT_GMS0 = MCF_GPT_GMS_OCPW(0xA5) | MCF_GPT_GMS_WDEN | MCF_GPT_GMS_CE | MCF_GPT_GMS_TMS_GPIO;
+
+	while (1);
+	/*NOTREACHED*/
+}
+EXPORT_SYMBOL(reset_cpu);
+