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

congedete at voila.fr congedete at voila.fr
Sat Feb 6 17:58:06 CET 2010


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" <joe at settoplinux.org>
> A : congedete at voila.fr
> Copie à : coreboot at coreboot.org
> Objet : Re: [coreboot] M2v-mx_se asus : nvram reset on power unplug
> 
> On 02/05/2010 02:35 PM, congedete at voila.fr wrote:
> >
> >
> >
> >> Message du 05/02/10 à 19h52
> >> De : "Joseph Smith"<joe at settoplinux.org>
> >> A : congedete at voila.fr
> >> Copie à : coreboot at coreboot.org
> >> Objet : Re: [coreboot] M2v-mx_se asus : nvram reset on power unplug
> >>
> >>
> >> On 02/05/2010 01:22 PM, congedete at voila.fr 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?
> 
> 
> -- 
> Thanks,
> Joseph Smith
> Set-Top-Linux
> www.settoplinux.org
> 
> -- 
> coreboot mailing list: coreboot at coreboot.org
> http://www.coreboot.org/mailman/listinfo/coreboot

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