Re: [coreboot] M2v-mx_se asus : nvram reset on power unplug

OK. I thought NVRAM was referring to CMOS in coreboot.
You learn me a new thing again.
Thank you very much Rudolf.
Regards.
> Message du 08/02/10 à 18h02
> De : "Rudolf Marek" 
> A : [e-mail]
> Copie à : "Joseph Smith" , [e-mail]
> Objet : Re: [coreboot] M2v-mx_se asus : nvram reset on power unplug
>
> hi
>
> This NVRAM is for suspend/resume. So it is only powered if 5VSB is 
> there. So it is not a real battery backup device.
>
> The platform has 256 bytes of classic NVRAM (CMOS). I think you can use 
> ioports 74/75. to get access
> to whole 256Bytes.
>
> (check if PCI 11.0 4e bit 3 is 1) I think it should be.
>
> Rudolf
>
> [e-mail] wrote:
> > I use those methods in Seabios.
> > And as soon as I unplug the power supply, load_state_from_nvram doesn't return the value saved.
> > Is something wrong with my methods ?
> >
> > #define K8T890_NVRAM_IO_BASE	0xf00
> > int save_state_to_nvram(u32 dword) {
> >     int nvram_pos=64;
> >    dprintf(1,"Writing %x of size 4 to nvram pos: %d\n", dword, nvram_pos);
> >    //size=4
> >    	outl(dword, K8T890_NVRAM_IO_BASE+nvram_pos);
> >    	nvram_pos +=4;
> >
> > return nvram_pos;
> > }
> >
> > int load_state_from_nvram( u32 *old_dword) {
> >     int nvram_pos=64;
> >     //size=4
> >    	*old_dword = inl(K8T890_NVRAM_IO_BASE+nvram_pos);
> >    	nvram_pos +=4;
> >
> > dprintf(1,"Loading %x of size 4 from nvram pos:%d\n", * old_dword, nvram_pos-4);
> >    return nvram_pos;
> > }
> > > Message du 05/02/10 à 20h38
> > > De : "Joseph Smith" 
> > > A : [e-mail]
> > > Copie à : [e-mail]
> > > Objet : Re: [coreboot] M2v-mx_se asus : nvram reset on power unplug
> > >
> > > On 02/05/2010 02:35 PM, [e-mail] wrote:
> > > > > Message du 05/02/10 à 19h52
> > > > > De : "Joseph Smith"
> > > > > A : [e-mail]
> > > > > Copie à : [e-mail]
> > > > > Objet : Re: [coreboot] M2v-mx_se asus : nvram reset on power unplug
> > > > >
> > > > > On 02/05/2010 01:22 PM, [e-mail] wrote:
> > > > > > Hello,
> > > > > >
> > > > > > When I shutdown my computer, my nvram datas are kept alive. But if I unplug/plug the power supply, nvram is reset.
> > > > > > The clock is OK, so it is not a battery problem.
> > > > > >
> > > > > > How can I keep datas in nvram when I unplug the power supply ?
> > > > >
> > > > > Either your CMOS battery is dead or you have RTC issue.
> > > >
> > > > But the clock is OK, so I don't think my CMOS battery is dead.
> > > > Could you tell me more about the RTC issue ?
> > >
> > > Is this with coreboot?
> >
> > Faites le plein d’amour, de cadeaux coquins et de poèmes romantiques avec Voila sur http://evenementiel.voila.fr/SaintValentin2010/

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