From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <36D03ACA.F8626298@phx.mcd.mot.com> Date: Sun, 21 Feb 1999 09:56:43 -0700 From: Johnnie Peters MIME-Version: 1.0 To: Gabriel Paubert CC: Jeremy Fitzhardinge , linuxppc-dev@lists.linuxppc.org, cort@cs.nmt.edu Subject: Re: Interrupt routing in prep_pci.c References: Content-Type: text/plain; charset=us-ascii Sender: owner-linuxppc-dev@lists.linuxppc.org List-Id: Hi Gabriel I would like to try your stuff out but I have not been able to get to your site. Do you have it anywhere else I can retrieve it from? I tried a version of it a while back and it did not seem to compile with the standard R4 compiler. At that time I tried to compile and use the latest egcs and binutils stuff and it seemed to work for the kernel but when I tried compiling user level stuff it gave me several problems. I have asked several people on the net and have not got a good answer as to what compiler I should be using with R4. Can you tell me the combination you are using? Thanks for your time, Johnnie Gabriel Paubert wrote: > On Wed, 10 Feb 1999, Jeremy Fitzhardinge wrote: > > > > > Hi Cort/all, > > > > I'm trying to work out what kernel/prep_pci.c is doing with interrupt routing. > > I'm looking at the stuff in the standard 2.2 kernel, so perhaps there's a better > > place for me to look. > > > > Firstly, in route_pci_interrupts it does an inb(0x800) to get something to > > determine the interrupt architecture of the board. What is this value, and > > where does it come from? > > It's a value which give sthe board type on rather old IBM/Motorola boards. > > > Rather than having hard-coded tables, can't the interrupt routing be determined > > from either firmware or the interrupt controller itself? The comment at the > > top of the file is that this will go away soon. What are you planning to > > replace it? > > Indeed, that's what I do from residual data on PreP machines and it seems > to work on several kinds of boards. You'll find it embedded somewhere > in the patch file at: > > ftp://vcorr1.iram.es/pub/linux-2.2/mvm2600.generic-patch-2.2.1 > > > Background: I'm porting LinuxPPC to a Yellowknife-like board running Open > > Firmware. It works well except that the drivers can't find their interrupts. > > Note that this patch includes a new bootloader for PreP machines, I'd like > to extend it to support OF too but don't have te time right now. > > Gabriel. [[ This message was sent via the linuxppc-dev mailing list. Replies are ]] [[ not forced back to the list, so be sure to Cc linuxppc-dev if your ]] [[ reply is of general interest. To unsubscribe from linuxppc-dev, send ]] [[ the message 'unsubscribe' to linuxppc-dev-request@lists.linuxppc.org ]]