Hi Bill,
Cool. Ill take a look at those. Im using the MPC860. Ill take a look at the
errata though. Thanks to u and Simon for the advices. If
I do get anything out of Wind river Ill post it here with the hope the next
person with the same issue could benefit from it.
Greetings
Ikhwan
From: [EMAIL PROTECTED]: [EMAIL PROTECTED]: RE: [lwip-users] Misalignment
problems on PowerPC (little endian mode)Date: Mon, 12 May 2008 09:19:58 -0400
Hi Ikhwan,
I’m currently using Freescale CodeWarrior Power Architecture C/C++ compiler –
Ver 8.8.1 (latest version) for the MPC8349EA PPC processor.
In Big-endian mode of course. lwIP performance and bandwidth are excellent and
extended saturated TCP bandwidth receive tests (over 3 billion packets
continuous) has been perfect. It took some time to work around a memory
coherency or lockup problem in the PowerPC that I’m still working with
Freescale on trying to figure out if it’s me doing something I shouldn’t be
doing or not. There’s an extensive errata on this part including 2 problems
with TSEC lockups – neither of which appear to be what I’m seeing.
Bill
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Muhamad Ikhwan
IsmailSent: Saturday, May 10, 2008 1:09 AMTo: Mailing list for lwIP
usersSubject: RE: [lwip-users] Misalignment problems on PowerPC (little endian
mode)
Hi Bill Well I wish I could do it in big endian for the PowerPC, since the
PowerPC corrects the alignment problems in the hardware itself in big endian
mode. Unfortunately the project itself requires meto do it little endian. Which
compiler did you use last time ? GreetingsIkhwan
> Date: Fri, 9 May 2008 17:30:10 +0200> From: [EMAIL PROTECTED]> To:
> [email protected]> Subject: Re: [lwip-users] Misalignment problems on
> PowerPC (little endian mode)> > Muhamad Ikhwan Ismail wrote:> >> > Hi,> >> >
> Thanks Bill and Simon. Simon is right, my payload is aligned. The > > problem
> arises when the Ethernet header> > gets stripped, the IP addr field is not
> aligned when it gets accessed. > > And I didnt know structure packing is a
> must. Then I have to> > find a way to make my port works. Meaning even if i
> fixed my ip addr > > processing macros and functions, Ill still get problems
> ?> I'm not sure but I think so, yeah. The reason is the same reason >
> 'network byte order' is used: when you exchange data over the network, >
> everyone would have to use the same alignment. Instead, packing is used.> > I
> thought i woulnt since all e.g TCP header fields are 2 bytes aligned ?> At
> least DNS had a problem with non-packed mode, I think. DHCP could > have
> problems, too...> > Simon> > >
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