On Jul 4, 2008, at 2:33 PM, John Baldwin wrote: > On Friday 04 July 2008 03:31:41 pm Marcel Moolenaar wrote: >> >> On Jul 4, 2008, at 2:59 AM, Dmitry Morozovsky wrote: >> >>> doesn't splitting uart out of kernel broke serial console? Last time >>> I checked >>> it did. >> >> Yes, it does. The serial console is setup/initialized and >> used before pre-loaded modules are linked and/or usable. >> We don't have the support in place that allows you to boot >> without console until pre-loaded modules are initialized, >> at which time add a low-level console device is setup. >> It's not that hard to do, I think. >> >> So, currently low-level console drivers, such as dcons(4), >> sio(4) and uart(4) need to be compiled into the kernel. >> Consequently any devices/busses to which any of these can >> attach must be compiled into the kernel as well. Of these >> acpi(4) and puc(4) are good examples. acpi(4) is a good >> example because we use hints to work around the issue and >> have sio(4) attach to isa(4) instead... > > Actually, sio does attach to acpi0. What happens for sio is that the > low-level console stuff is just doing bare-bones inb/outb anyway. > sioX > devices do attach to acpi0 though just fine. That's because sio(4) compiles-in the acpi bus attachment even if acpi is not compiled-in. That's cheating :-) -- Marcel Moolenaar xcllnt_at_mac.comReceived on Fri Jul 04 2008 - 20:06:50 UTC
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