Hello, On Tuesday 22 January 2008 10:03:08 am Arnd Hannemann wrote: > Jordan Crouse wrote: > > Okay - I've been exploring a little bit more. I talked to the TinyBIOS > > developer, and he verified that TinyBIOS shouldn't use any MFGPT timers. > > He also told me that the mysterious "MFGPT workaround" was in fact the > > magic MFGPT erasing MSR that was in the old kernel driver. > > > > So with the "MFGPT workaround" turned off, TinyBIOS should be acting like > > the OLPC firmware with regards to timers, yet it is not. So that is > > curious. I think I might have identified a race condition in the code, > > but I'm not 100% sure thats the same problem that the ALIX platform is > > seeing. > > > > Anrd and others - will you please try the attached patch on your platform > > with the "MFGPT workaround" turned off and mfgpts enabled, and send out > > the dmesg? > > Of course, tinyBios version v0.99, "MFGPT workaround" turned off, > CONFIG_GEODE_MFGPT_TIMER=n: > > [ 67.369697] NET: Registered protocol family 16 > [ 67.383059] geode-mfgpt: IRQ MSR=0:0 > [ 67.394058] geode-mfgpt: NMI MSR=0:0 > [ 67.405049] geode-mfgpt: Unrestricted sources=0 > [ 67.418909] geode: 8 MFGPT timers available. > [ 67.433211] PCI: PCI BIOS revision 2.10 entry at 0xfcd03, last bus=0 > > same with CONFIG_GEODE_MFGPT_TIMER=y (sorry, without move printk patch): > > [ 22.289349] NET: Registered protocol family 16 > [ 22.302716] geode-mfgpt: IRQ MSR=0:0 > [ 22.313716] geode-mfgpt: NMI MSR=0:0 > [ 22.324704] geode-mfgpt: Unrestricted sources=0 > [ 22.338566] geode-mfgpt: Registered timer 0 > [ 22.351393] mfgpt-timer: registering the MFGT timer as a clock event. > ^^^^ Hangs here I had the same problem with MFGPT Timers and alix (BIOS v0.99). I found that if you use a different interrupt than the default 7 for MFGPT (just append mfgpt_irq=8 to the kernel commandline), the timer seems to work.
CPU0 0: 33 XT-PIC-XT timer 2: 0 XT-PIC-XT cascade 4: 1662 XT-PIC-XT serial 8: 766 XT-PIC-XT mfgpt-timer 14: 473 XT-PIC-XT libata NMI: 0 ERR: 0 > > This will give us some debug information that I can use to ensure that > > the interrupts are set up correctly. You can leave the timer tick > > disabled if you want. > > > > > > Thanks, > > Jordan > > Arnd Lars -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
