* NAND behind INT13 BIOS interface
@ 2006-07-19 9:34 Indrek Kruusa
2006-07-19 15:09 ` David Woodhouse
0 siblings, 1 reply; 3+ messages in thread
From: Indrek Kruusa @ 2006-07-19 9:34 UTC (permalink / raw)
To: linux-mtd
Hi!
I have board with NAND and BIOS seems to have built-in driver for that.
BIOS provides INT 13 interface for the NAND too.
Is there a solution to access such NAND (with the help of INT 13) as a
usual block device from Linux?
Best regards,
Indrek
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: NAND behind INT13 BIOS interface
2006-07-19 9:34 NAND behind INT13 BIOS interface Indrek Kruusa
@ 2006-07-19 15:09 ` David Woodhouse
2006-07-20 10:32 ` Indrek Kruusa
0 siblings, 1 reply; 3+ messages in thread
From: David Woodhouse @ 2006-07-19 15:09 UTC (permalink / raw)
To: Indrek Kruusa; +Cc: linux-mtd
On Wed, 2006-07-19 at 12:34 +0300, Indrek Kruusa wrote:
> I have board with NAND and BIOS seems to have built-in driver for that.
> BIOS provides INT 13 interface for the NAND too.
>
> Is there a solution to access such NAND (with the help of INT 13) as a
> usual block device from Linux?
There used to be such a hack -- it's quite evil and fragile though. You
have to switch back into real mode to invoke the BIOS call, and you need
to preserve enough of the pre-boot environment that it can still work.
Running it in vm86 mode might also work, if you're lucky.
Seriously though, I wouldn't bother -- just implement a translation
layer in Linux which is compatible.
--
dwmw2
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: NAND behind INT13 BIOS interface
2006-07-19 15:09 ` David Woodhouse
@ 2006-07-20 10:32 ` Indrek Kruusa
0 siblings, 0 replies; 3+ messages in thread
From: Indrek Kruusa @ 2006-07-20 10:32 UTC (permalink / raw)
To: David Woodhouse; +Cc: linux-mtd
David Woodhouse wrote:
> On Wed, 2006-07-19 at 12:34 +0300, Indrek Kruusa wrote:
>> I have board with NAND and BIOS seems to have built-in driver for that.
>> BIOS provides INT 13 interface for the NAND too.
>>
>> Is there a solution to access such NAND (with the help of INT 13) as a
>> usual block device from Linux?
>
> There used to be such a hack -- it's quite evil and fragile though. You
> have to switch back into real mode to invoke the BIOS call, and you need
> to preserve enough of the pre-boot environment that it can still work.
> Running it in vm86 mode might also work, if you're lucky.
>
> Seriously though, I wouldn't bother -- just implement a translation
> layer in Linux which is compatible.
Thanks for the advice.
It may be that I switch to LinuxBIOS and then there could be more
options to cope with that.
Indrek
^ permalink raw reply [flat|nested] 3+ messages in thread
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2006-07-19 9:34 NAND behind INT13 BIOS interface Indrek Kruusa
2006-07-19 15:09 ` David Woodhouse
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