From: Nicolas Pitre <nico-vtqb6HGKxmzR7s880joybQ@public.gmane.org>
To: Stephen Warren <swarren-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org>
Cc: Russell King - ARM Linux
<linux-lFZ/pmaqli7XmaaqVzeoHQ@public.gmane.org>,
Stephen Warren <swarren-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>,
Arnd Bergmann <arnd-r2nGTMty4D4@public.gmane.org>,
Rob Herring <rob.herring-bsGFqQB8/DxBDgjK7y7TUQ@public.gmane.org>,
Olof Johansson <olof-nZhT3qVonbNeoWH0uzbU5w@public.gmane.org>,
Tim Bird <tim.bird-mEdOJwZ7QcZBDgjK7y7TUQ@public.gmane.org>,
"linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
"linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org"
<linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org>
Subject: Re: [RFC PATCH 0/3] ARM: uncompress.h multi-platform enablement
Date: Thu, 27 Sep 2012 23:53:33 -0400 (EDT) [thread overview]
Message-ID: <alpine.LFD.2.02.1209272343330.6667@xanadu.home> (raw)
In-Reply-To: <50632096.7080208-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org>
On Wed, 26 Sep 2012, Stephen Warren wrote:
> In the Tegra case, by omitting uncompress.h, we lose more than just the
> "Decompressing Linux..." message; uncompress.h contains code to parse
> extract the platform's debug UART ID from data set up by the boot ROM
> (since we have 5 UARTs), and pass this on to debug-macro.S.
Let me tell you that this is totally evil. OMAP and Davinci are doing
the same abuse.
> Without uncompress.h running, debug-macro.S would either have to
> hard-code a single UART ID (and different boards uses different UARTs,
> which would make running a single kernel image across all Tegra
> devices with earlyprintk enabled impossible) *or* we'd have to port
> the UART ID extraction code to debug-macro.S too,
Please do the later. That's the only sane solution.
> which I don't fancy very much since that's assembly whereas
> uncompress.h is C.
Well, that's too bad. Time to sharpen your assembly skills. ;-)
Nicolas
next prev parent reply other threads:[~2012-09-28 3:53 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-25 22:46 [RFC PATCH 0/3] ARM: uncompress.h multi-platform enablement Stephen Warren
[not found] ` <1348613212-21897-1-git-send-email-swarren-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org>
2012-09-25 22:46 ` [RFC PATCH 1/3] ARM: move ICEDCC uncompress.h to common location Stephen Warren
[not found] ` <1348613212-21897-2-git-send-email-swarren-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org>
2012-09-26 21:56 ` Domenico Andreoli
2012-09-27 5:19 ` Stephen Warren
2012-09-25 22:46 ` [RFC PATCH 2/3] ARM: mvebu: restore uncompress.h Stephen Warren
2012-09-25 22:46 ` [RFC PATCH 3/3] ARM: tegra: move debug macros to include/debug Stephen Warren
2012-09-26 10:38 ` [RFC PATCH 0/3] ARM: uncompress.h multi-platform enablement Arnd Bergmann
[not found] ` <201209261038.36223.arnd-r2nGTMty4D4@public.gmane.org>
2012-09-26 10:44 ` Russell King - ARM Linux
[not found] ` <20120926104421.GA7040-l+eeeJia6m9vn6HldHNs0ANdhmdF6hFW@public.gmane.org>
2012-09-26 12:05 ` Arnd Bergmann
[not found] ` <201209261205.01351.arnd-r2nGTMty4D4@public.gmane.org>
2012-09-26 13:10 ` Domenico Andreoli
2012-09-26 13:48 ` Tim Bird
[not found] ` <506307A0.7010701-mEdOJwZ7QcZBDgjK7y7TUQ@public.gmane.org>
2012-09-26 14:17 ` Arnd Bergmann
[not found] ` <201209261417.18883.arnd-r2nGTMty4D4@public.gmane.org>
2012-09-26 14:48 ` Tim Bird
[not found] ` <506315A6.3090300-mEdOJwZ7QcZBDgjK7y7TUQ@public.gmane.org>
2012-09-26 14:49 ` Arnd Bergmann
[not found] ` <201209261449.48468.arnd-r2nGTMty4D4@public.gmane.org>
2012-09-26 15:10 ` Russell King - ARM Linux
[not found] ` <20120926151023.GC30938-l+eeeJia6m9vn6HldHNs0ANdhmdF6hFW@public.gmane.org>
2012-09-26 15:34 ` Stephen Warren
[not found] ` <50632096.7080208-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org>
2012-09-28 3:53 ` Nicolas Pitre [this message]
2012-09-27 5:37 ` Jean-Christophe PLAGNIOL-VILLARD
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