[coreboot] [Flashrom] Read the content of AT49F002(N)T on Syntax SV266A (was: Re: [Flashrom] No EEPROM/flash device found. on Syntax SV266A)

Paul Menzel paulepanter at users.sourceforge.net
Sun Mar 22 19:04:18 CET 2009

Dear Yu Ning, Carl-Daniel and Peter,

thanks for your ongoing help.

Am Sonntag, den 22.03.2009, 18:27 +0100 schrieb Peter Stuge:
> FENG Yu Ning wrote:
> > > An area can be covered by multiple MTRRs. As long as at
> > > least one MTRR covering the area is "uncachable", everything is OK.
> > 
> > If I understood correctly, Paul could do
> > 
> >     echo "base=0x1ffc0000 size=0x40000 type=uncachable" >| /proc/mtrr
> > 
> > and then try flashrom again.
> > 
> > Am I right?
> Flash is at top of 4GB so I think it should be
> echo "base=0xfffc0000 size=0x40000 type=uncachable" >| /proc/mtrr

# echo "base=0xfffc0000 size=0x40000 type=uncachable" >| /proc/mtrr
$ cat /proc/mtrr
reg00: base=0x00000000 (   0MB), size= 512MB: write-back, count=1
reg01: base=0xd0000000 (3328MB), size= 128MB: write-combining, count=1
reg02: base=0xd0000000 (3328MB), size= 128MB: write-combining, count=1
reg03: base=0xd8000000 (3456MB), size=  64MB: write-combining, count=1
reg04: base=0xfffc0000 (4095MB), size= 256KB: uncachable, count=1

I tried flashrom with the different delays (10, 100, 1000, 10000, 40000
all in us) afterwards, but the image did not differ.


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