>> I'm asking because obviously I don't know the answer, but can't a >> serial >> port on a PCI card be used? Wouldn't that be simpler than through-USB >> debugging? > > yeah, but how do you debug the PCI bringup code if PCI is not up to > drive the card in the PCI slot ... assuming there *is* a PCI slot. > That's the problem. The USB debug capability is supposed to work even > when almost nothing is work.
EHCI debug port requires PCI to be set up (at least partially) -- it requires a BAR. > Serial ports are no longer that way. > > "Progress!" Yeah. It's time that all CPU manufacturers see the light and attach the "system I/O" (serial, I2C, SPI, some GPIOs, flash) directly to the CPU. >> If not, well I'll find a new board, but I like the fact that this >> board is >> already passively cooled (a requirement, or at least a strong >> plus, in our >> product), is quite cheap and from a reputable company. > > we have to solve this. So, let's solve it. Yep. It's going to be a pain though, for the reasons you outlined yourself already. Segher -- linuxbios mailing list [email protected] http://www.openbios.org/mailman/listinfo/linuxbios
