DiskOnChip 2000 and Millenium support in GRUB bootloader

[Vadim Khmelnitsky]

Another thing that i forgot to mention earlier . When you guys write SPL to
flash i assume you read the content of the first 1Kb ( 2 copies of IPL ) of
flash and attach it to your SPL . The important thing here is to write IPL
part with ECC/EDC syndrom . Otherwise, IPL will not be able to read SPL out
of flash .

Vadim

-----Original Message-----
From: Vadim Khmelnitsky [mailto:VadimK at m-sys.com]
Sent: Mon, February 25, 2002 4:26 PM
To: 'Ilguiz Latypov'; Mark Meade
Cc: linux-mtd at lists.infradead.org
Subject: RE: DiskOnChip 2000 and Millenium support in GRUB bootloader 


[Ilguiz]
Vadim, should the Millennium SPL check sum include IPL?

[Vadim]
No . IPL of Millennium chip copies 7K of data out of offset 0x400 and
calculates the checksum  , which should be 0x55 . If it's not 0x55 IPL
returns to BIOS without executing SPL .

Vadim
-----Original Message-----
From: Ilguiz Latypov [mailto:ilatypov at superbt.com]
Sent: Fri, February 22, 2002 2:39 PM
To: Mark Meade
Cc: linux-mtd at lists.infradead.org
Subject: Re: DiskOnChip 2000 and Millenium support in GRUB bootloader 



Mark,

On Fri, 22 Feb 2002, Mark Meade wrote:

> The doc_loadbios output to /dev/mtd0 is off by 512 bytes (when I use an
> offset of 1024):

Thanks for the correction.   I adjusted your patch to take into account 
the almost impossible case when IPL is bigger than erase sector.

> My system now recognizes that something is there, but refuses to boot:
>     Searching for boot record from SCSI: Not Found.

Perhaps, IPL refuses to execute SPL (GRUB's doc_stage1) because the
doc_stage1's check sum didn't include IPL itself.  

Vadim, should the Millennium SPL check sum include IPL?

The other thought is if the stage1 code can be placed instead of IPL.

Ilguiz



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