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
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