We need a way to parse command-line options before setup_arch() for 
early printk.  On x86, the only thing that is needed to get an early 
serial console is:
console_setup("ttyS0,115200");
serial8250_console_init();

So, in addition to this patch, all you need to get early printk on x86 
is serial8250_console_init() in i386's setup_arch() and a 
console=ttyS0,speed on the kernel command line.

Are there any architectures that can't even do a memcpy before 
setup_arch()?
-- 
Dave Hansen
haveblue@us.ibm.com