WIP: Ubiquity's router station

So it has been a month since last post about this device and I think it's time to announce current state of affairs.

• UART: just works
  
• PCI controller: kind of works. Proper interrupt handling/routing required.
  
• On-board ethernet controller: WAN port works fine. Mounts NFS root/loads init. Some minor work should be done in order to get both ports working.
  
• Integrated OHCI controller: kernel detects and initializes it. Need USB cable to connect something to headers on the board and test if it actually works.
  
• Integrated EHCI controller: in progress. Some refactoring of current MIPS bus_space implementation required.
  
• GPIO: to be done
  
• Flash memory: to be done
  

At the moment further progress was blocked with something that looks like memory corruption. It's hard to trace with ktr(4) and printf(9) so I ordered Flyswatter JTAG adapter and MIPS14 adapter from Tin Can Tools. I was warned that Flyswatter/MIPS combination is not supported by OpenOCD but I'd better spend some time making it work then tracing obscure memory corruptions in the wild.