On Thu, 2004-08-19 at 19:28, Steven Blakeslee wrote: > I am trying to get an IBM 405GPr processor to work as a target/host on a PCI > bus. A PCI target can temporarily become a host on the PCI bus. Basically > this means it needs to do everything the host currently does except > assigning PCI memory space, the dedicated host is responsible for this.
> [snip] > I was wondering if anyone has done something like this, not necessarily with > a 405, any processor experience will do. I appreciate any help or advice. I've written drivers for several systems of this form. Generally people are trying to do one of the following: 1) Communicate between the PCI root (running Linux, Windows, or anything else) and embedded Linux on a non-root processor. This requires a custom driver, but is essentially straightforward. Eugene Surovegin has described this elsewhere in the thread. 2) Communicate between embedded Linux on a non-root processor and custom electronics on another non-root device. This also requires a straightforward custom driver. 3) Use a standard Linux device driver running on a non-root processor to control a standard PCI device elsewhere on the bus. This is usually unsolvable without a custom motherboard to provide the required interrupt routing. Most people give up and use a non-transparent PCI bridge instead. Does your requirement fit one of those? - Adrian Cox http://www.humboldt.co.uk/ ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
