On 1/28/09, Aurelien Jarno <[email protected]> wrote: > Mark Cave-Ayland a écrit : > > > Hi everyone, > > > > Whilst playing around with openbios to try and understand how it works > > on different platforms, I found that using coreboot-v3 with openbios SVN > > causes openbios to panic on boot under qemu SVN. The trace can be found > > here: > > > > http://pastebin.siriusit.co.uk/coreboot-v3-panic.txt > > > > With the help of some people on the coreboot mailing list, I've > > performed an SVN bisection and found that the panic starts appearing at > > r416 in openbios SVN for which the commit message can be found here: > > > > http://lists.openbios.org/pipermail/openbios/2009-January/003401.html > > > > However, I can't find any reference to the rationale behind the commit. > > Can anyone explain further explain whether is commit is correct or not? > > > The rationale is available here: > http://lists.openbios.org/pipermail/openbios/2009-January/003391.html > > This commit fixes two different problems encountered on SPARC64 and > PowerPC. First of all it makes sure that no PCI device get allocated > port 0, which doesn't exists. > > Secondly it fixes problems with non-PCI devices that are using I/O ports > at fixed location. This includes the video card, i8259, rtc, serial > port, hard-disk controller, etc. Without this patch, the PCI cards are > getting allocated the I/O ports of those devices, thus causing crashes. > > I wonder why it causes problem on x86. What is the initial value of > arch->io_base? I am unable to find that looking at the code.
I think "arch" (a bit unfortunate name choice for grepping) does not get initialized at all for x86. -- coreboot mailing list: [email protected] http://www.coreboot.org/mailman/listinfo/coreboot
