freebsd stable - May 2005 - 5.4-RELEASE amd64: Panic isadma_start : bad bounce buffer

Just been trying to install FreeBSD 5.4 amd64 here and
when loading the raid control kernel module driver ( hptmv )
from floppy and booting I was getting:
Panic isadma_start : bad bounce buffer

The driver install docs stated to disable ACPI it this happened
this prevented the cards from being detected. Anyway I found
a workaround which is interesting. After loading the module
from floppy I unplugged the floppy drive this seems to fix the
issue, no panic and the controllers detected find ( installing as
we speak ) so is there a problem with floppy access in amd64
5.4?

    Steve


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On Sat, 14 May 2005, Steven Hartland wrote:
> Just been trying to install FreeBSD 5.4 amd64 here and
> when loading the raid control kernel module driver ( hptmv )
> from floppy and booting I was getting:
> Panic isadma_start : bad bounce buffer
This is a known bug; floppy drives don't work on amd64 since the ISA DMA
buffer gets allocated above 16MB.  I don't know if this is something that
needs to be handled by busdma.

-- 
Doug White                    |  FreeBSD: The Power to Serve
dwhite@gumbysoft.com          |  www.FreeBSD.org