Hi Stefan, There were silent corruptions I noticed during a RAID-5 test using silicon image card. Then I hooked up a analyzer and found that eye diagram was not wide enough. After reducing the de-emphasis value I noticed better eye diagram. Also I ran 72 hour test which was successful to see if there are any corruptions .
Even though these de-emphasis values are only applicable to Linux. I wanted to make sure both Linux and u-boot are in sync. Regards, Marri -----Original Message----- From: Stefan Roese [mailto:[EMAIL PROTECTED] Sent: Friday, August 22, 2008 1:42 AM To: [email protected] Cc: Feng Kan; Tirumala Reddy Marri Subject: Re: [U-Boot] [PATCH] ppc4xx: AMCC PPC460GT/EX PCI-E de-emphasis adjustment fix Hi Marri, On Friday 22 August 2008, [EMAIL PROTECTED] wrote: > From: Tirumala R Marri <[EMAIL PROTECTED]> > > During recent PCI-E tests it has been found that current driverl level > and de-emphasis values are not set correctly. > After sweeping throgh all de-ephasis values, it was found that 0x130 > is a right value. Where 0x13 is driver level and 0 is de-emphasis. Is this supposed to fix the issue with the Intel PRO/1000 in PCIe slot 0 on Canyonlands? Booting with root-fs via NFS doesn't work with this card in slot 0. In slot 1 it works. I just tested this patch and the Linux patch you posted and the issue is still there: eth0: Link is Up 1000 Mbps Full Duplex, Flow Control: RX/TX Looking up port of RPC 100005/1 on 10.0.0.152 VFS: Mounted root (nfs filesystem). Freeing unused kernel memory: 156k init modprobe: FATAL: Could not load /lib/modules/2.6.26-00016-gf873d41/modules.dep: No such file or directory modprobe: FATAL: Could not load /lib/modules/2.6.26-00016-gf873d41/modules.dep: No such file or directory INIT: version 2.86 booting Welcome to DENX Embedded Linux Environment Press 'I' to enter interactive startup. modprobe: FATAL: Could not load /lib/modules/2.6.26-00016-gf873d41/modules.dep: No such file or directory modprobe: FATAL: Could not load /lib/modules/2.6.26-00016-gf873d41/modules.dep: No such file or directory Cannot access the Hardware Clock via any known method. Use the --debug option to see the details of our search for an access method. Setting clock : Thu Jan 1 01:00:13 CET 1970 [ OK ] Building the cache nfs: server 10.0.0.152 not responding, still trying nfs: server 10.0.0.152 not responding, still trying nfs: server 10.0.0.152 not responding, still trying nfs: server 10.0.0.152 not responding, still trying nfs: server 10.0.0.152 not responding, still trying Any comments on this? Thanks. Best regards, Stefan ===================================================================== DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: +49-8142-66989-0 Fax: +49-8142-66989-80 Email: [EMAIL PROTECTED] ===================================================================== _______________________________________________ U-Boot mailing list [email protected] http://lists.denx.de/mailman/listinfo/u-boot
