* Sebastian Andrzej Siewior | 2011-01-24 09:58:50 [+0530]:

This patch adds minimal support for device tree support on x86. It will
be passed to the kernel via setup_data which requires atleast boot
protocol 2.09.
Memory size, restricted memory regions, boot arguments are gathered the
traditional way so things like cmd_line are just here to let the code
compile.
The current plan is use the device tree as an extension and to gather
informations from it which can not be enumerated and have to be
hardcoded otherwise. This includes things like
- which devices are on this I2C/ SPI bus?
- how are the interrupts wired to IO APIC?
- where could my hpet be?

Andres, this patch moves some of the OF defines you added for OLPC from
irq.c to prom.c which requires CONFIG_X86_OF to be enabled. A later
patch changes irq_create_of_mapping() from returning intspec[0] to
actually doing something. Could you please check how of OLPC gets broken
and what we could do about it? :)

Sebastian