MIPS: Loongson: Split common loongson source code out

To share common loongson source code between all of the loongson-based
machines. there is a need to split it out of the fuloong-2e/ directory.
at the same time, other according tuning is needed. the machine-specific
parts are defined as macros in relative header file, pci.h, mem.h,
machine.h.

Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/loongson/common/init.c

@@ -0,0 +1,30 @@
+/*
+ * Copyright (C) 2009 Lemote Inc. & Insititute of Computing Technology
+ * Author: Wu Zhangjin, wuzj@lemote.com
+ *
+ * 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.
+ */
+
+#include <linux/bootmem.h>
+
+#include <asm/bootinfo.h>
+
+#include <loongson.h>
+
+void __init prom_init(void)
+{
+    /* init base address of io space */
+	set_io_port_base((unsigned long)
+		ioremap(BONITO_PCIIO_BASE, BONITO_PCIIO_SIZE));
+
+	prom_init_cmdline();
+	prom_init_env();
+	prom_init_memory();
+}
+
+void __init prom_free_prom_memory(void)
+{
+}