From: will.deacon@arm.com (Will Deacon)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 9/9] ARM: vexpress: Config option for early printk console
Date: Wed, 11 Jul 2012 15:09:12 +0100 [thread overview]
Message-ID: <20120711140912.GC13498@mudshark.cambridge.arm.com> (raw)
In-Reply-To: <1342013791-19516-10-git-send-email-pawel.moll@arm.com>
Hi Pawel,
On Wed, Jul 11, 2012 at 02:36:31PM +0100, Pawel Moll wrote:
> +#else /* CONFIG_DEBUG_LL_UART_NONE */
> +
> + .macro addruart, rp, rv, tmp
> + /*
> + * Have to provide reasonable dummy values,
> + * otherwise code in head.S crashes badly...
> + */
> + mov \rp, #0
> + mov \rv, #0
> + .endm
Eek, this means we take out an I/O section mapping at zero, doesn't it?
Is that really a good idea? It scares me because (a) it's below PAGE_OFFSET
and (b) we don't know consistently what's at physical address 0.
Perhaps we could change head.S to avoid the mapping if addruart returns a
NULL virtual address?
Will
next prev parent reply other threads:[~2012-07-11 14:09 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-11 13:36 [PATCH 0/9] Versatile Express updates for 3.6 Pawel Moll
2012-07-11 13:36 ` [PATCH 1/9] ARM: vexpress: remove automatic errata workaround selection Pawel Moll
2012-07-11 15:02 ` Rob Herring
2012-07-11 15:18 ` Will Deacon
2012-07-11 15:45 ` Rob Herring
2012-07-11 15:53 ` Will Deacon
2012-07-11 18:06 ` Rob Herring
2012-07-11 18:14 ` Will Deacon
2012-07-12 10:17 ` [PATCH v2] " Pawel Moll
2012-07-12 14:14 ` Will Deacon
2012-07-12 14:39 ` Rob Herring
2012-07-11 13:36 ` [PATCH 2/9] ARM: vexpress: Check master site in daughterboard's sysctl operations Pawel Moll
2012-07-11 13:36 ` [PATCH 3/9] ARM: versatile: Make plat-versatile clock optional Pawel Moll
2012-07-11 16:43 ` Linus Walleij
2012-07-11 16:58 ` Pawel Moll
2012-07-12 0:11 ` Mike Turquette
2012-07-11 13:36 ` [PATCH 4/9] ARM: vexpress: Initial common clock support Pawel Moll
2012-07-11 16:51 ` Linus Walleij
2012-07-11 16:57 ` Pawel Moll
2012-07-16 20:15 ` Turquette, Mike
2012-07-17 9:48 ` Pawel Moll
2012-07-11 13:36 ` [PATCH 5/9] ARM: vexpress: Add missing SP804 interrupt in motherboard's DTS files Pawel Moll
2012-07-11 13:36 ` [PATCH 6/9] ARM: vexpress: Add fixed regulator for SMSC Pawel Moll
2012-07-11 13:36 ` [PATCH 7/9] ARM: vexpress: Convert V2P-CA15 Device Tree to 64 bit addresses Pawel Moll
2012-07-11 13:36 ` [PATCH 8/9] ARM: vexpress: Add Device Tree for V2P-CA15_CA7 core tile Pawel Moll
2012-07-11 13:36 ` [PATCH 9/9] ARM: vexpress: Config option for early printk console Pawel Moll
2012-07-11 14:09 ` Will Deacon [this message]
2012-07-11 14:16 ` Pawel Moll
2012-07-11 14:23 ` Pawel Moll
2012-07-11 14:23 ` Jonathan Austin
2012-07-11 14:24 ` Pawel Moll
2012-07-11 16:21 ` [PATCH v2] " Pawel Moll
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20120711140912.GC13498@mudshark.cambridge.arm.com \
--to=will.deacon@arm.com \
--cc=linux-arm-kernel@lists.infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.