Hi Rob and all,
>>>
>>> Am Dienstag, den 05.06.2012, 12:42 -0600 schrieb Stephen Warren:
On 06/05/2012 11:47 AM, Lucas Stach wrote:
> Recent toolchains default to using the hardware feature for
> unaligned access on ARM v7, rather than doing the software
> fallback. According to A
On 06/22/2012 04:15 AM, Albert ARIBAUD wrote:
> Hi Lucas,
>
> On Tue, 05 Jun 2012 21:06:20 +0200, Lucas Stach wrote:
>> Hi Stephen,
>>
>> Am Dienstag, den 05.06.2012, 12:42 -0600 schrieb Stephen Warren:
>>> On 06/05/2012 11:47 AM, Lucas Stach wrote:
Recent toolchains default to using the har
Dear Aneesh V,
In message <4fe8dce7.7090...@ti.com> you wrote:
>
> > What is the (non-contrived) problem to which allowing mis-aligned
> > accesses would be a solution?
>
> memcpy() when there is a mismatch in the alignment of source and
> destination buffers. Let's say the source buffer is 4 by
Hi Albert,
On 06/25/2012 01:34 PM, Albert ARIBAUD wrote:
Hi Aneesh,
BTW, I agree that enabling un-aligned access is not a bad idea.
Just being "not a bad idea" is not enough for me to accept this. It
will have to be the sole sound solution to a problem, and at this
point, I do not think it i
Hi Albert,
Am Montag, den 25.06.2012, 22:17 +0200 schrieb Albert ARIBAUD:
> Hi Lucas,
>
> On Sun, 24 Jun 2012 08:30:19 +0200, Lucas Stach wrote:
> > Hi Albert,
> >
> > Am Samstag, den 23.06.2012, 11:01 +0200 schrieb Albert ARIBAUD:
> > [snip]
> > > > >> But apart from this, we certainly have si
Hi Aneesh,
> >> BTW, I agree that enabling un-aligned access is not a bad idea.
> >
> > Just being "not a bad idea" is not enough for me to accept this. It
> > will have to be the sole sound solution to a problem, and at this
> > point, I do not think it is as far as USB structure mis-alignement
>
Hi Albert,
Am Samstag, den 23.06.2012, 11:01 +0200 schrieb Albert ARIBAUD:
[snip]
> > >> But apart from this, we certainly have situations where we have
> > >> unaligned accesses that are justified and could not be removed.
> > >> [...]
> > >> I cannot see how enabling a hardware feature can be se
Albert ARIBAUD writes:
>> >> I cannot see how enabling a hardware feature can be seen as
>> >> allowing of lax behaviour. As some of the USB structs are used to
>> >> access hardware registers, we can not align every struct there.
>
> If the access is in true RAM, then we can always realign the d
Hi Albert,
On Sat, Jun 23, 2012 at 2:01 AM, Albert ARIBAUD
wrote:
> Hi Aneesh,
>
> On Fri, 22 Jun 2012 15:13:39 -0700, Aneesh V wrote:
>> On 06/22/2012 03:11 PM, Aneesh V wrote:
>> > +Tom
>> >
>> > Hi Lucas,
>> >
>> > On 06/22/2012 04:47 AM, Lucas Stach wrote:
>> >> Hi Albert,
>> >>
>> >> Am Fre
Hi Aneesh,
On Fri, 22 Jun 2012 15:13:39 -0700, Aneesh V wrote:
> On 06/22/2012 03:11 PM, Aneesh V wrote:
> > +Tom
> >
> > Hi Lucas,
> >
> > On 06/22/2012 04:47 AM, Lucas Stach wrote:
> >> Hi Albert,
> >>
> >> Am Freitag, den 22.06.2012, 13:16 +0200 schrieb Albert ARIBAUD:
> >>> I am not too happ
On 06/22/2012 03:11 PM, Aneesh V wrote:
+Tom
Hi Lucas,
On 06/22/2012 04:47 AM, Lucas Stach wrote:
Hi Albert,
Am Freitag, den 22.06.2012, 13:16 +0200 schrieb Albert ARIBAUD:
Hi Lucas,
Linux in particular does reinitialize this state and I expect any
reasonable OS to do so.
Then what is th
+Tom
Hi Lucas,
On 06/22/2012 04:47 AM, Lucas Stach wrote:
Hi Albert,
Am Freitag, den 22.06.2012, 13:16 +0200 schrieb Albert ARIBAUD:
Hi Lucas,
Linux in particular does reinitialize this state and I expect any
reasonable OS to do so.
Then what is the point of enabling it on U-Boot? Does it
Hi Albert,
Am Freitag, den 22.06.2012, 13:16 +0200 schrieb Albert ARIBAUD:
> Hi Lucas,
>
> > > > Linux in particular does reinitialize this state and I expect any
> > > > reasonable OS to do so.
> > >
> > > Then what is the point of enabling it on U-Boot? Does it fix some
> > > issue whereby som
Hi Lucas,
> > > Linux in particular does reinitialize this state and I expect any
> > > reasonable OS to do so.
> >
> > Then what is the point of enabling it on U-Boot? Does it fix some
> > issue whereby some mis-aligned piece of data cannot be properly
> > aligned?
> >
> Yes, it fixes U-Boot US
Am Freitag, den 22.06.2012, 11:15 +0200 schrieb Albert ARIBAUD:
> Hi Lucas,
>
> On Tue, 05 Jun 2012 21:06:20 +0200, Lucas Stach wrote:
> > Hi Stephen,
> >
> > Am Dienstag, den 05.06.2012, 12:42 -0600 schrieb Stephen Warren:
> > > On 06/05/2012 11:47 AM, Lucas Stach wrote:
> > > > Recent toolchai
Hi Lucas,
On Tue, 05 Jun 2012 21:06:20 +0200, Lucas Stach wrote:
> Hi Stephen,
>
> Am Dienstag, den 05.06.2012, 12:42 -0600 schrieb Stephen Warren:
> > On 06/05/2012 11:47 AM, Lucas Stach wrote:
> > > Recent toolchains default to using the hardware feature for
> > > unaligned access on ARM v7, r
Hi Stephen,
Am Dienstag, den 05.06.2012, 12:42 -0600 schrieb Stephen Warren:
> On 06/05/2012 11:47 AM, Lucas Stach wrote:
> > Recent toolchains default to using the hardware feature for unaligned
> > access on
> > ARM v7, rather than doing the software fallback. According to ARM this is
> > safe
On 06/05/2012 11:47 AM, Lucas Stach wrote:
> Recent toolchains default to using the hardware feature for unaligned access
> on
> ARM v7, rather than doing the software fallback. According to ARM this is safe
> as all v7 implementations have to support this feature.
> (http://infocenter.arm.com/hel
Recent toolchains default to using the hardware feature for unaligned access on
ARM v7, rather than doing the software fallback. According to ARM this is safe
as all v7 implementations have to support this feature.
(http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.dui0471c/BABJFFAE.html)
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