[lwip-users] Nios datacashe problem

[Jan Ulvesten]

The problem is related to an unlucky sequence of machine instructions actually 
found in pbuf_header's code (!).  Removing the data cache or changing the size 
(diff. from 32 bytes) will help.  ALtera does oalso provide a fix.

But; the Altera fix didn't help me for some reason which I don't know. I did 
remove the cache entirely. If you are able to make thins work after installing 
the Altera fix, please inform me.


Jan Ulvesten
Senior Software Engineer
SICOM  AS


-----Original Message-----
From: Etienne Lanoy [mailto:address@hidden 
Sent: 7. april 2006 08:48
To: Mailing list for lwIP users
Subject: SPAM? [lwip-users] Pbuf assertion failure

Yes I'm using Altera Nios but I have search the patch for the Data cache 
bug but
I've not found it.

I'm very desagree because in all my software I do the same action 
tcp_write and after
tcp_output. There is no problem. Maybe something is broken in my 
software but
I haven't any idea what can produce this assertion failure.

I thank you a lot for your help.

Best regards,
Etienne

Jan Ulvesten a écrit:

>Are you running Altera/Nios II?
>
>If yes, check out Altera website and/or niosforum.com. There is a
>problem with the Nios II data cache. A patch is available (to the IDE). 
>
>Jan Ulvesten
>Senior Software Engineer
>SICOM  AS
>Tel   +47 72 89 56 55
>Fax  +47 72 89 56 51
>Mob +47 416 62 033
> 
>-----Original Message-----
>From: Etienne Lanoy [mailto:address@hidden 
>Sent: 6. april 2006 14:21
>To: address@hidden
>Subject: SPAM? [lwip-users] Pbuf assertion failure
>
>Hello,
>
>I've a problem with an assertion in the file pbuf.c :
>In the function pbuf_free, the assertion
>
>LWIP_ASSERT("pbuf_free: sane flags",
>    p->flags == PBUF_FLAG_RAM || p->flags == PBUF_FLAG_ROM ||
>    p->flags == PBUF_FLAG_REF || p->flags == PBUF_FLAG_POOL);
>
>occur.
>
>Before that I have done a tcp_write and a tcp_output
>
>I've never see it before. Do you know what's happend ?
>
>I use it all arround my software and in my new piece of code I'm writing
>
>fail this assertion...
>I don't understand.
>
>I thank you a lot.
>
>Etienne
>




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