Re: [PATCH 4/5] serial: convert early_uart to earlycon for 8250
From: Yinghai Lu
Date: Thu May 31 2007 - 14:49:18 EST
On 5/31/07, Bjorn Helgaas <bjorn.helgaas@xxxxxx> wrote:
> not really.
I'm sorry, I don't understand the point you're making.
Andrew's proposal was that we could add early_uart_ioremap to the list of
bt_ioremap and dmi_ioremap.
for i386, bt_ioremap is using fixmap, and it is temporary boot-time
mappings, used before ioremap() is functional.
but we need one as permanent fixed address.
for x86_64, early_ioremap. I'd like to make to static, because
dmi_ioremap could use ioremap instead.
Fix address could make the earlycon can be used more earlier.
YH
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