lpc43xx: Move M4 specific files to m4/

lib/lpc43xx/m4/vector_chipset.c

@@ -0,0 +1,48 @@
+/*
+ * This file is part of the libopencm3 project.
+ *
+ * Copyright (C) 2010 Piotr Esden-Tempski <piotr@esden.net>
+ * Copyright (C) 2012 Michael Ossmann <mike@ossmann.com>
+ *
+ * This library is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This library 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this library.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <libopencm3/cm3/common.h>
+
+extern unsigned _etext_ram, _text_ram, _etext_rom;
+
+#define CREG_M4MEMMAP   MMIO32((0x40043000 + 0x100))
+
+static void pre_main(void)
+{
+	volatile unsigned *src, *dest;
+
+	/* Copy the code from ROM to Real RAM (if enabled) */
+	if ((&_etext_ram-&_text_ram) > 0) {
+		src = &_etext_rom-(&_etext_ram-&_text_ram);
+		/* Change Shadow memory to ROM (for Debug Purpose in case Boot
+		 * has not set correctly the M4MEMMAP because of debug)
+		 */
+		CREG_M4MEMMAP = (unsigned long)src;
+
+		for (dest = &_text_ram; dest < &_etext_ram; ) {
+			*dest++ = *src++;
+		}
+
+		/* Change Shadow memory to Real RAM */
+		CREG_M4MEMMAP = (unsigned long)&_text_ram;
+
+		/* Continue Execution in RAM */
+	}
+}