Messages in this thread | | | Date | Tue, 25 Jan 2011 17:10:49 -0500 | From | Mark Lord <> | Subject | Re: [PATCH 0/2][concept RFC] x86: BIOS-save kernel log to disk upon panic |
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On 11-01-25 12:05 PM, Ahmed S. Darwish wrote: > > My current x86 laptop includes the very common ATA PIIX controller.
ata_piix is just about ideal for this sort of thing.
Except, don't use the BIOS to write the logs, but rather code/use a very simple set of polling-PIO functions to talk directly through the PIIX to the drive.
Really really simple code to do that, and it would likely work with anything ata-piix, and most other non-AHCI chipsets too.
Not perfect, but probably good enough for a lot of scenarios. The old hd.c driver shows how to read/write a sector at a time, and that kind of code is easily converted to simply poll for completion.
Cheers
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