2.6.x with TQM860L

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 || [email protected] || 1-866-677-4546

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

@@ -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);
 		}

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 || [email protected] || 1-866-677-4546

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: [email protected]
Nobody goes to that restaurant anymore. It's too crowded.

... 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 || [email protected] || 1-866-677-4546