The data required varies. You are right that it is not huge but it impacts the boot time
quite a bit.
It is good to know there aren't any plans until now. It would be a pitty to start a
development while this is already underway.
5481 SM Schijndel
T : +31-(0)73-594 46 64
E : wvervoorn(a)eltan.com
W : http://www.eltan.com
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From: Kevin O'Connor [mailto:firstname.lastname@example.org]
Sent: Tuesday, January 26, 2016 6:02 PM
To: Wim Vervoorn <wvervoorn(a)eltan.com>
Subject: Re: [SeaBIOS] sd card support
On Tue, Jan 26, 2016 at 04:17:54PM +0000, Wim Vervoorn wrote:
I am trying to use the sdcard support in SeaBIOS.
It is working but the performance is far from optimal. As far as I was
able to see this is because the current support is polling only.
Do you know if there are plans to make dma versions of the code available?
I'm not aware of any plan.
Normally SeaBIOS disk drivers are only used to load the boot loader and kernel, which is
usually under 10 megs of data. How much data are you loading and how much time is it
The SeaBIOS code doesn't enable the faster SD card speeds nor enable the additional
data lines. If additional performance is needed I suspect it would be sufficient to
update the init sequence to do that.