From: robherring2@gmail.com (Rob Herring)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2] ARM: map ATAGs when not in first 1MB of RAM
Date: Fri, 28 Jan 2011 09:10:41 -0600 [thread overview]
Message-ID: <4D42DC71.5080606@gmail.com> (raw)
In-Reply-To: <20110128141031.GB12976@n2100.arm.linux.org.uk>
Russell,
On 01/28/2011 08:10 AM, Russell King - ARM Linux wrote:
> On Fri, Jan 28, 2011 at 08:00:46AM -0600, Rob Herring wrote:
>> @@ -206,11 +206,17 @@ __create_page_tables:
>> #endif
>>
>> /*
>> - * Then map first 1MB of ram in case it contains our boot params.
>> + * Then map boot params address in r2 or
>> + * the first 1MB of ram if boot params address is not specified.
>> */
>> - add r0, r4, #PAGE_OFFSET>> 18
>> - orr r6, r7, r8
>> - str r6, [r0]
>> + mov r0, r2, lsr #20
>> + movs r0, r0, lsl #20
>> + moveq r0, r8
>> + sub r3, r0, r8
>> + add r3, r3, #PAGE_OFFSET
>> + add r3, r4, r3, lsr #18
>> + orr r6, r7, r0
>> + str r6, [r3]
>
> Wouldn't:
> str r6, [r4, r3, lsr #18]
> work here?
Not on Thumb2:
arch/arm/kernel/head.S:218: Error: Thumb supports only LSL in shifted
register indexing -- `str r6,[r4,r3,lsr#18]'
Rob
WARNING: multiple messages have this Message-ID (diff)
From: Rob Herring <robherring2-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
To: Russell King - ARM Linux <linux-lFZ/pmaqli7XmaaqVzeoHQ@public.gmane.org>
Cc: devicetree-discuss-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org
Subject: Re: [PATCH v2] ARM: map ATAGs when not in first 1MB of RAM
Date: Fri, 28 Jan 2011 09:10:41 -0600 [thread overview]
Message-ID: <4D42DC71.5080606@gmail.com> (raw)
In-Reply-To: <20110128141031.GB12976-l+eeeJia6m9vn6HldHNs0ANdhmdF6hFW@public.gmane.org>
Russell,
On 01/28/2011 08:10 AM, Russell King - ARM Linux wrote:
> On Fri, Jan 28, 2011 at 08:00:46AM -0600, Rob Herring wrote:
>> @@ -206,11 +206,17 @@ __create_page_tables:
>> #endif
>>
>> /*
>> - * Then map first 1MB of ram in case it contains our boot params.
>> + * Then map boot params address in r2 or
>> + * the first 1MB of ram if boot params address is not specified.
>> */
>> - add r0, r4, #PAGE_OFFSET>> 18
>> - orr r6, r7, r8
>> - str r6, [r0]
>> + mov r0, r2, lsr #20
>> + movs r0, r0, lsl #20
>> + moveq r0, r8
>> + sub r3, r0, r8
>> + add r3, r3, #PAGE_OFFSET
>> + add r3, r4, r3, lsr #18
>> + orr r6, r7, r0
>> + str r6, [r3]
>
> Wouldn't:
> str r6, [r4, r3, lsr #18]
> work here?
Not on Thumb2:
arch/arm/kernel/head.S:218: Error: Thumb supports only LSL in shifted
register indexing -- `str r6,[r4,r3,lsr#18]'
Rob
next prev parent reply other threads:[~2011-01-28 15:10 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-28 14:00 [PATCH v2] ARM: map ATAGs when not in first 1MB of RAM Rob Herring
2011-01-28 14:00 ` Rob Herring
2011-01-28 14:10 ` Russell King - ARM Linux
2011-01-28 14:10 ` Russell King - ARM Linux
2011-01-28 15:10 ` Rob Herring [this message]
2011-01-28 15:10 ` Rob Herring
2011-02-07 16:23 ` Tony Lindgren
2011-02-07 16:23 ` Tony Lindgren
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=4D42DC71.5080606@gmail.com \
--to=robherring2@gmail.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.