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

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?

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M2v-mx_se asus : nvram reset on power unplug

[Rudolf Marek]

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/