Hi Albert,

+asm ("\n\

A file scope asm?!  Please don't.

+ * We enter with the cache enabled, the MMU enabled and some known  
legacy
+ * memory mappings active. xBAT3 is unused

It would be good if you could depend as little as possible on these  
things;
that makes writing another bootloader a lot easier.

+	/* IBAT3,DBAT3 for first 16Mbytes */\n\
+	li	8, 0x01ff	/* 16MB */\n\
+	li      9, 0x0002	/* rw */\n\
+	mtspr   0x216, 8	/* IBAT3U */\n\
+	mtspr   0x217, 9	/* IBAT3L */\n\
+	mtspr   0x21e, 8	/* DBAT3U */\n\
+	mtspr   0x21f, 9	/* DBAT3L */\n\

WIMG=0000, are you sure?  Not M=1?

+	bcl-    20,4*cr7+so,1f\n\

Just write  bcl 20,31,1f .


Segher