[LinuxBIOS] [linux-usb-devel] [RFC][PATCH 0/2] x86_64 Early usb debug port support.
ak at suse.de
Wed Dec 6 22:24:33 CET 2006
> - Host, to which that console connects (through the debug device);
> runs usb_debug, much like any other usb-serial device
My understanding was that the client could run in user
space only on top of libusb.
> It's analagous to debugging an embedded box using a serial console
> with a Linux host ... except the target here is a PC, not an ARM
> (or PPC, MIPS, etc) custom board.
> Once the coexistence issues between the debug port and normal EHCI
> driver get worked, there's no reason not to keep using that debug
> port as a system console.
One reason is the one I covered in my last mail -- locking of the PCI
type 1 ports.
However I suppose it would be ok to switch Eric's code between early
pci access and locked one once the PCI subsystem is up and running.
Just don't forget bust_spinlocks()
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