[LinuxBIOS] BIOS Saver RD1

[yhlu]

I believe, sometime the SB eat some byte...write to LPC.

YH

On 8/3/05, Andi Kleen <ak at suse.de> wrote:
> On Wed, Aug 03, 2005 at 09:50:49AM -0700, yhlu wrote:
> > You need split mess into two seperate thing
> > 1. does flash_rom support your MB, some mb has gpio to disable the
> > flash write or last 64KiB
> > 2. are you give dead bios savior.
> >
> > ps. other thing about flash_rom
> > 1. with 2.6 kernel 64 bit for amd8111 based MB, you can not install 4G
> > or more in CPU0.
> > 2. with 2.6 kernel 64 bit for Nvidia ck804 based MB, you must install
> > 4G or more in CPU0
> >
> > solution is use 32 bit 2.6 or 2.4 32bit or 2.4 64 bit.
> > for case 1 you can command line: maxmem to limit mem to 4G less.
> >
> > It seems last 4KiB near 4G can not be accessed. when read in Linux it
> > alreays show 0.
> >
> > Andi may have some idea about it. maybe something related iommu...
> 
> IOMMU is not involved here. Me and Torsten looked at it some time ago
> and we suspected a chipset issue because there was nothing obviously
> special with the way that memory was mapped via /dev/mem.
> 
> -Andi
> 
>