Re: [coreboot] [PATCH]Move QRANK_DIMM_SUPPORT to Kconfig
Patrick Georgi wrote: (are qrank dimms really a per-board thing?) Which boards do not have the variable set? //Peter -- coreboot mailing list: coreboot@coreboot.org http://www.coreboot.org/mailman/listinfo/coreboot
Re: [coreboot] [PATCH]Move QRANK_DIMM_SUPPORT to Kconfig
Am 05.11.2010 19:20, schrieb Peter Stuge: Patrick Georgi wrote: (are qrank dimms really a per-board thing?) Which boards do not have the variable set? About 30, I think. I only did a grep .. | wc -l comparison: $ grep NORTHBRIDGE_AMD_AMDK8 src/mainboard/*/*/Kconfig |wc -l 86 So 86 boards are eligible for that option. $ svn st |grep romstage.c |wc -l 63 63 boards have that option dropped (the patch is the only change in that tree). So there are 23 boards that do not set it. Patrick -- coreboot mailing list: coreboot@coreboot.org http://www.coreboot.org/mailman/listinfo/coreboot
Re: [coreboot] [PATCH]Move QRANK_DIMM_SUPPORT to Kconfig
-Original Message- From: coreboot-boun...@coreboot.org [mailto:coreboot-boun...@coreboot.org] On Behalf Of Peter Stuge Sent: Friday, November 05, 2010 01:21 PM To: coreboot@coreboot.org Subject: Re: [coreboot] [PATCH]Move QRANK_DIMM_SUPPORT to Kconfig ]Patrick Georgi wrote: ] (are qrank dimms really a per-board thing?) ] ]Which boards do not have the variable set? I am no quad rank dimm expert, but I think few boards support them. One is Serengeti Cheetah. I remember asking why one processor socket has 4 dimm slots and another 8. I was told it was for quad rank dimm testing. The chip selects for two normal dimm sockets are combined and routed to a quad rank socket, if I remember correctly. I don't even have any quad ranked dimms to test with. I think they are rare. Thanks, Scott ]//Peter -- coreboot mailing list: coreboot@coreboot.org http://www.coreboot.org/mailman/listinfo/coreboot
Re: [coreboot] [PATCH]Move QRANK_DIMM_SUPPORT to Kconfig
On Fri, Nov 05, 2010 at 01:28:59PM -0500, Scott Duplichan wrote: I am no quad rank dimm expert, but I think few boards support them. One is Serengeti Cheetah. I remember asking why one processor socket has 4 dimm slots and another 8. I was told it was for quad rank dimm testing. The chip selects for two normal dimm sockets are combined and routed to a quad rank socket, if I remember correctly. I don't even have any quad ranked dimms to test with. I think they are rare. Actually, they are not *that* rare, since they are readily available: http://www.newegg.com/Product/ProductList.aspx?Submit=ENEDEPA=0Order=BESTMATCHDescription=ddr3+quad+rankx=0y=0 Thanks, Ward. -- Ward Vandewege w...@fsf.org Free Software Foundation - Senior Systems Administrator -- coreboot mailing list: coreboot@coreboot.org http://www.coreboot.org/mailman/listinfo/coreboot
Re: [coreboot] [PATCH]Move QRANK_DIMM_SUPPORT to Kconfig
-Original Message- From: Ward Vandewege [mailto:w...@gnu.org] Sent: Friday, November 05, 2010 01:42 PM To: Scott Duplichan Cc: 'Peter Stuge'; coreboot@coreboot.org Subject: Re: [coreboot] [PATCH]Move QRANK_DIMM_SUPPORT to Kconfig ]On Fri, Nov 05, 2010 at 01:28:59PM -0500, Scott Duplichan wrote: ] I am no quad rank dimm expert, but I think few boards support them. One is Serengeti ] Cheetah. I remember asking why one processor socket has 4 dimm slots and another 8. ] I was told it was for quad rank dimm testing. The chip selects for two normal dimm sockets ] are combined and routed to a quad rank socket, if I remember correctly. I don't even ] have any quad ranked dimms to test with. I think they are rare. ] ]Actually, they are not *that* rare, since they are readily available: ] ] ]http://www.newegg.com/Product/ProductList.aspx?Submit=ENEDEPA=0Order=BESTMATCHDescription=ddr3]+quad+rankx=0y=0 Sure enough. And not a bad price (per MB), either. Thanks for pointing them out. Though I would question the maturity of coreboot support for registered DDR3 in general, and specifically for 1333 speed or quad rank. I believe these were perfected internally at AMD only recently. How well has coreboot been tested with various speeds of registered DDR3? There is a lot more complexity in the memory init code when registered DIMMs of any rank count are used. And there is still the question of what boards supported by coreboot really have hardware support for quadrank. I would hate to mislead someone into buying a system loaded with registered memory with the idea of running coreboot, unless it is known to work. Thanks, Scott ]-- ]Ward Vandewege w...@fsf.org ]Free Software Foundation - Senior Systems Administrator -- coreboot mailing list: coreboot@coreboot.org http://www.coreboot.org/mailman/listinfo/coreboot
Re: [coreboot] [PATCH]Move QRANK_DIMM_SUPPORT to Kconfig
Am 05.11.2010 19:58, schrieb Scott Duplichan: really have hardware support for quadrank. I would hate to mislead someone into buying a system loaded with registered memory with the idea of running coreboot, unless it is known to work. I think (and hope) that I didn't mark any board as quad rank capable that wasn't marked that way before, but I can't tell if the original options are set correctly. In this regard, the tree with this patch is as good as without. Patrick -- coreboot mailing list: coreboot@coreboot.org http://www.coreboot.org/mailman/listinfo/coreboot
Re: [coreboot] [PATCH]Move QRANK_DIMM_SUPPORT to Kconfig
Am 05.11.2010 19:58, schrieb Scott Duplichan: really have hardware support for quadrank. I would hate to mislead someone into buying a system loaded with registered memory with the idea of running coreboot, unless it is known to work. I think (and hope) that I didn't mark any board as quad rank capable that wasn't marked that way before, but I can't tell if the original options are set correctly. In this regard, the tree with this patch is as good as without. Agreed. Acked-by: Myles Watson myle...@gmail.com Thanks, Myles -- coreboot mailing list: coreboot@coreboot.org http://www.coreboot.org/mailman/listinfo/coreboot
