pre-mem startup

git-svn-id: svn://svn.coreboot.org/coreboot/trunk@1207 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

src/arch/ppc/init/Config.lb

@@ -1,2 +1,2 @@
 init crt0.S.lb
-#initobject stuff.o
+initobject ppc_main.o

src/arch/ppc/init/ppc_main.c

@@ -0,0 +1,39 @@
+/* 
+ * Copyright (C) 2003 by Greg Watson, Los Alamos National Laboratory
+ * gwatson@lanl.gov
+ */
+
+extern unsigned _iseg[];
+extern unsigned _liseg[];
+extern unsigned _eliseg[];
+
+void (*hardwaremain)(int) = _iseg;
+
+/*
+ * At this point we're running out of flash with our
+ * stack in cache ram. We need to do the following:
+ *
+ * - turn on real memory
+ * - relocate our payload into real memory
+ * - start executing payload
+ */
+
+void ppc_main(void)
+{
+	unsigned *from;
+	unsigned *to;
+
+	sdram_init();
+
+	/*
+	 * Relocate payload (text & data) if necessary
+	 */
+	if (_liseg != _iseg) {	
+		from = _liseg;
+		to = _iseg;
+		while (from < _eliseg)
+			*to++ = *from++;
+	}
+
+	hardwaremain(0);
+}