According to data sheet, should do the change. -----邮件原件----- 发件人: Hendricks David W. [mailto:[EMAIL PROTECTED] 发送时间: 2004年3月18日 16:23 收件人: Craig C Forney 抄送: [EMAIL PROTECTED] 主题: Re: AMD K8 memory bug with more than 2 banks
I have applied your fix and booted it up on a Tyan S2885 mainboard with four banks full, but have not noticed any change in non-reserved registers on the AMD 8111. Can you please elaborate on exactly what changes I might observe? I want to check out the specifications on the memory we're using and make sure we're getting the right values. On Tue, 16 Mar 2004, Craig C Forney wrote: > > I ran into a problem with a Dual Opeteron cPCI board we developed with 4 > banks of memory. It showed up when the third and fourth banks were > populated. I narrowed it down to a problem in src/amd/amdk8/raminit.c. > There is a '+' where there should be a '*', causing the SPD settings to > get corrupted, which causes bizarre results which varies depending on > the memory parameters read from the DIMMs. One possible result is that > some DIMMs will work marginally because one or more of their settings > has been corrupted. > > This patch seems to resolve the problem. I'm not sure if anybody else > out there is accessing 4 banks of memory via the Opteron memory > interface, so it might be just us, but it would probably be a good idea > to commit this patch to the freebios2 source tree. Can someone take > this on? > > Thanks, > > Craig Forney > Opus Innovations LLC > > diff -Naur raminit.c.orig raminit.c > --- raminit.c.orig 2004-03-16 13:25:05.000000000 -0800 > +++ raminit.c 2004-03-16 13:42:30.000000000 -0800 > @@ -924,7 +924,7 @@ > sz.side2 = 0; > } > map = pci_read_config32(ctrl->f2, DRAM_BANK_ADDR_MAP); > - map &= ~(0xf << (index + 4)); > + map &= ~(0xf << (index * 4)); > > /* For each base register. > * Place the dimm size in 32 MB quantities in the bits 31 - 21. > > > _______________________________________________ > Linuxbios mailing list > [EMAIL PROTECTED] > http://www.clustermatic.org/mailman/listinfo/linuxbios > _______________________________________________ Linuxbios mailing list [EMAIL PROTECTED] http://www.clustermatic.org/mailman/listinfo/linuxbios _______________________________________________ Linuxbios mailing list [EMAIL PROTECTED] http://www.clustermatic.org/mailman/listinfo/linuxbios
