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Date: Wed, 15 Sep 2010 11:49:12 -0500
From: Scott Wood <scottwood@freescale.com>
To: "tiejun.chen" <tiejun.chen@windriver.com>
Subject: Re: Generating elf kernel ?
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Cc: linuxppc-dev@lists.ozlabs.org, Guillaume Dargaud <dargaud@lpsc.in2p3.fr>
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On Wed, 15 Sep 2010 16:27:10 +0800
"tiejun.chen" <tiejun.chen@windriver.com> wrote:

> It's impossible to boot PPC vmlinux format directly if you only change the
> original entry point address, 0xc0000000.

Why?  That's pretty much what the bootwrapper does.  Our hypervisor has
directly booted vmlinux this way.

Note that in recent kernels physaddr is even set to zero, allowing the
ELF loader to just use that instead of magically knowing the kernel
wants to go at address zero.

> For kernel the following is as default:
> v:0xc0000000 --> p:0x0

That mapping is set up by code at the entry point of vmlinux, not by
the bootwrapper.

-Scott