[LinuxBIOS] flashrom fails on GA-M57SLI with 1MB ROM

[Carl-Daniel Hailfinger]

On 28.11.2007 23:15, Andreas B. Mundt wrote:
> On Wed, Nov 28, 2007 at 12:57:01AM +0100, Carl-Daniel Hailfinger wrote:
>   
>> On 23.11.2007 20:31, Andreas B. Mundt wrote:
>>     
>>>>> Does flashrom -r  actually return a file of all 0xFFs after the erase?
>>>>>
>>>>>       
>>>>>           
>>>> In fact it does not. Most of the file looks as if it is still the
>>>> linuxbios.rom.
>>>>
>>>>     
>>>>         
>>> For me, writing seems to work only from address 0x000f0000 upwards. 
>>> This is part of the ROM content read after writing 1M of zeros (prior
>>> to the zero-writing, LB was on the chip):
>>>
>>> 000eff10: 80f9 1a76 0d0f b6c9 b301 83e9 08d3 e383  ...v............
>>> 000eff20: cb01 8a47 0131 d23c 0188 856f ffff ff76  ...G.1.<...o...v
>>> 000eff30: 110f b68d 5fff ffff b201 83e9 08d3 e283  ...._...........
>>> 000eff40: ca01 80bd 5eff ffff 0074 1289 d801 db83  ....^....t......
>>> 000eff50: e001 09c3 89d0 83e0 0101 d209 c281 e201  ................
>>> 000eff60: 00f8 1f8b 8d58 ffff ff89 de89 9560 ffff  .....X.......`..
>>> 000eff70: ff8b 9538 ffff ff81 e601 00f8 1f8d 04cd  ...8............
>>> 000eff80: 4000 0000 b9f8 0c00 008b 520c c1ea 0409  @.........R.....
>>> 000eff90: d025 fcff ff7f 8995 64ff ffff 0d00 0000  .%......d.......
>>> 000effa0: 8089 caef 89f0 b2fc ef8b 9d58 ffff ff89  ...........X....
>>> 000effb0: ca01 db8d 049d 4400 0000 0b85 64ff ffff  ......D.....d...
>>> 000effc0: 25fc ffff 7f0d 0000 0080 ef8b 8560 ffff  %............`..
>>> 000effd0: ffb2 fcef 80bd 6fff ffff 0475 428d 049d  ......o....uB...
>>> 000effe0: 5000 0000 89ca 0b85 64ff ffff 25fc ffff  P.......d...%...
>>> 000efff0: 7f0d 0000 0080 ef89 f0b2 fcef 8d04 9d54  ...............T
>>> 000f0000: 0000 0000 0000 0000 0000 0000 0000 0000  ................
>>> 000f0010: 0000 0000 0000 0000 0000 0000 0000 0000  ................
>>> 000f0020: 0000 0000 0000 0000 0000 0000 0000 0000  ................
>>> 000f0030: 0000 0000 0000 0000 0000 0000 0000 0000  ................
>>> 000f0040: 0000 0000 0000 0000 0000 0000 0000 0000  ................
>>> 000f0050: 0000 0000 0000 0000 0000 0000 0000 0000  ................
>>> 000f0060: 0000 0000 0000 0000 0000 0000 0000 0000  ................
>>> 000f0070: 0000 0000 0000 0000 0000 0000 0000 0000  ................
>>> 000f0080: 0000 0000 0000 0000 0000 0000 0000 0000  ................
>>> 000f0090: 0000 0000 0000 0000 0000 0000 0000 0000  ................
>>> 000f00a0: 0000 0000 0000 0000 0000 0000 0000 0000  ................
>>> 000f00b0: 0000 0000 0000 0000 0000 0000 0000 0000  ................
>>> 000f00c0: 0000 0000 0000 0000 0000 0000 0000 0000  ................
>>>
>>> This is the same part afer erase:
>>>
>>> 000eff10: 80f9 1a76 0d0f b6c9 b301 83e9 08d3 e383  ...v............
>>> 000eff20: cb01 8a47 0131 d23c 0188 856f ffff ff76  ...G.1.<...o...v
>>> 000eff30: 110f b68d 5fff ffff b201 83e9 08d3 e283  ...._...........
>>> 000eff40: ca01 80bd 5eff ffff 0074 1289 d801 db83  ....^....t......
>>> 000eff50: e001 09c3 89d0 83e0 0101 d209 c281 e201  ................
>>> 000eff60: 00f8 1f8b 8d58 ffff ff89 de89 9560 ffff  .....X.......`..
>>> 000eff70: ff8b 9538 ffff ff81 e601 00f8 1f8d 04cd  ...8............
>>> 000eff80: 4000 0000 b9f8 0c00 008b 520c c1ea 0409  @.........R.....
>>> 000eff90: d025 fcff ff7f 8995 64ff ffff 0d00 0000  .%......d.......
>>> 000effa0: 8089 caef 89f0 b2fc ef8b 9d58 ffff ff89  ...........X....
>>> 000effb0: ca01 db8d 049d 4400 0000 0b85 64ff ffff  ......D.....d...
>>> 000effc0: 25fc ffff 7f0d 0000 0080 ef8b 8560 ffff  %............`..
>>> 000effd0: ffb2 fcef 80bd 6fff ffff 0475 428d 049d  ......o....uB...
>>> 000effe0: 5000 0000 89ca 0b85 64ff ffff 25fc ffff  P.......d...%...
>>> 000efff0: 7f0d 0000 0080 ef89 f0b2 fcef 8d04 9d54  ...............T
>>> 000f0000: ffff ffff ffff ffff ffff ffff ffff ffff  ................
>>> 000f0010: ffff ffff ffff ffff ffff ffff ffff ffff  ................
>>> 000f0020: ffff ffff ffff ffff ffff ffff ffff ffff  ................
>>> 000f0030: ffff ffff ffff ffff ffff ffff ffff ffff  ................
>>> 000f0040: ffff ffff ffff ffff ffff ffff ffff ffff  ................
>>> 000f0050: ffff ffff ffff ffff ffff ffff ffff ffff  ................
>>> 000f0060: ffff ffff ffff ffff ffff ffff ffff ffff  ................
>>> 000f0070: ffff ffff ffff ffff ffff ffff ffff ffff  ................
>>> 000f0080: ffff ffff ffff ffff ffff ffff ffff ffff  ................
>>> 000f0090: ffff ffff ffff ffff ffff ffff ffff ffff  ................
>>> 000f00a0: ffff ffff ffff ffff ffff ffff ffff ffff  ................
>>> 000f00b0: ffff ffff ffff ffff ffff ffff ffff ffff  ................
>>> 000f00c0: ffff ffff ffff ffff ffff ffff ffff ffff  ................
>>> 000f00d0: ffff ffff ffff ffff ffff ffff ffff ffff  ................
>>>
>>> The flashing speed seems to be rather slow compared to
>>> flashing speed after booting with proprietary BIOS. At block 0x000f0000
>>> the speed suddenly increases dramatically.
>>>
>>> With proprietary BIOS anything seems to work so far :-(
>>>   
>>>       
>> Is that still the case? This observation may be the key to understand
>> what's going on.
>>
>>     
>
> I verified the above again, it is still absolutely correct on my board: 
> Erasing and writing works fine starting from 0x000f0000, but up
> to this address nothing happens at all.  
>   

OK, then we probably have either partial chip protection (by setting
some bits in the chip) or partial mapping.

Regards,
Carl-Daniel