2.6.x with TQM860L

2.6.x with TQM860L

[Karim Yaghmour]

I've been trying to get a 2.6.x kernel working with a TQM860L board
with little success. I can get 2.6.11.6 to boot and _sometimes_ get
to a shell, but most of the times it dies while starting init. From
reading the archives, this looks very much like an SDRAM config issue
(i.e. dies mostly when bursting.) Has anyone on this list got a
2.6.x kernel working with the TQM860L?

Thanks,

Karim
-- 
Author, Speaker, Developer, Consultant
Pushing Embedded and Real-Time Linux Systems Beyond the Limits
http://www.opersys.com || karim@opersys.com || 1-866-677-4546

Re: 2.6.x with TQM860L

[Pantelis Antoniou]

[-- Attachment #1: Type: text/plain, Size: 866 bytes --]

Karim Yaghmour wrote:
> I've been trying to get a 2.6.x kernel working with a TQM860L board
> with little success. I can get 2.6.11.6 to boot and _sometimes_ get
> to a shell, but most of the times it dies while starting init. From
> reading the archives, this looks very much like an SDRAM config issue
> (i.e. dies mostly when bursting.) Has anyone on this list got a
> 2.6.x kernel working with the TQM860L?
> 
> Thanks,
> 
> Karim

Karim hi

You need the following small patch.

For all the gory details follow the thread
   "8xx v2.6 TLB problems and suggested workaround"

Latest 2.6.12-rc2 works for me.

I don't know if there are any specific problems with TQM860L.

Please be aware that the serial driver has changed
     arch/ppc/8xx_io/uart.c -> drivers/serial/cpm_uart

Also if you use the FEC do give a whirl at drivers/net/fec_8xx.

Regards

Pantelis


[-- Attachment #2: 8xx-tlbie.patch --]
[-- Type: text/x-patch, Size: 583 bytes --]

--- linux-2.5/arch/ppc/mm/init.c	2005-04-01 13:33:07.000000000 +0300
+++ linux-2.5-intracom/arch/ppc/mm/init.c	2005-04-05 10:28:04.000000000 +0300
@@ -620,9 +620,10 @@
 		struct page *page = pfn_to_page(pfn);
 		if (!PageReserved(page)
 		    && !test_bit(PG_arch_1, &page->flags)) {
-			if (vma->vm_mm == current->active_mm)
-				__flush_dcache_icache((void *) address);
-			else
+			if (vma->vm_mm == current->active_mm) {
+				_tlbie(address);
+				__flush_dcache_icache((void *)address);
+			} else
 				flush_dcache_icache_page(page);
 			set_bit(PG_arch_1, &page->flags);
 		}

Re: 2.6.x with TQM860L

[Karim Yaghmour]

Pantelis Antoniou wrote:
> You need the following small patch.
> 
> For all the gory details follow the thread
>    "8xx v2.6 TLB problems and suggested workaround"

Thanks. I haven't tried the actual patch you sent, but Marcelo's patch
does work with the TQM860L.

Karim
-- 
Author, Speaker, Developer, Consultant
Pushing Embedded and Real-Time Linux Systems Beyond the Limits
http://www.opersys.com || karim@opersys.com || 1-866-677-4546

Re: 2.6.x with TQM860L

[Wolfgang Denk]

In message <4259FA09.8040508@opersys.com> you wrote:
> 
> I've been trying to get a 2.6.x kernel working with a TQM860L board
> with little success. I can get 2.6.11.6 to boot and _sometimes_ get
> to a shell, but most of the times it dies while starting init. From
> reading the archives, this looks very much like an SDRAM config issue
> (i.e. dies mostly when bursting.) Has anyone on this list got a
> 2.6.x kernel working with the TQM860L?

No, in this case it is not a SDRAM issue. I  understand  that  you're
using U-Boot on the board, and this is one of our reference platforms
and among the best tested systems with U-Boot.

Did you apply Marcelo's patch?

Best regards,

Wolfgang Denk

-- 
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd@denx.de
Nobody goes to that restaurant anymore. It's too crowded.

Re: 2.6.x with TQM860L

[Karim Yaghmour]

Wolfgang Denk wrote:
> No, in this case it is not a SDRAM issue. I  understand  that  you're
> using U-Boot on the board, and this is one of our reference platforms
> and among the best tested systems with U-Boot.
> 
> Did you apply Marcelo's patch?

... Karim returns to mailing list with brown bag on his head ...

hmm... I keep telling newbies to read the archives ... lucky for me
I actually got intelligent replies.

I figured the TQM board ought to not have that type of problem, but
I just couldn't nail down the real problem. So yes, after having
tried Marcelo's patch, things work fine. However, noe that 2.6.11.6
doesn't work out of the box for the board (i.e. doing "make
TQM860L_defconfig" doesn't yield a functional config.) I had to
manually hack a config together for it to actually work.

Thanks,

Karim
-- 
Author, Speaker, Developer, Consultant
Pushing Embedded and Real-Time Linux Systems Beyond the Limits
http://www.opersys.com || karim@opersys.com || 1-866-677-4546