linux-kernel - [PATCH 0/3]x86: USB debug port early

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Date:	Sun, 20 May 2007 22:18:45 -0700
From:	"Yinghai Lu" <yhlu.kernel@...il.com>
To:	"Andi Kleen" <ak@...e.de>,
	"Andrew Morton" <akpm@...ux-foundation.org>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	"Greg KH" <gregkh@...e.de>, "Bjorn Helgaas" <bjorn.helgaas@...com>,
	"Vivek Goyal" <vgoyal@...ibm.com>
Cc:	"linux kernel mailing list" <linux-kernel@...r.kernel.org>
Subject: [PATCH 0/3]x86: USB debug port early_printk support

early_printk support on x86 platform
the patch was started by Eric, and I used it in LinuxBIOS, and added
some timeout etc.
also make it consistent to latest tree about relocated kernel feature.

include three part
1. x86_64: early init pgt for fix virtual addr in head.S, so can use
set_fixmap before setup_arch.
2. i386: early init pgt for fix virtual addr in head.S, so can use
set_fixmap before setup_arch.
3. changes in early_printk for early debug port support.

It could be good material for 2.6.23.

We may need 1 for earlycon support for mmio type 8250 to use fix
virtual address.

YH
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