12 Oct
2010
12 Oct
'10
2:29 a.m.
On Tue, 12 Oct 2010, Michael Hope wrote:
Ah, I see. You use the JTAG unit and on-chip debug hardware for the kernel and use the JTAG-supplied DCC connection for applications. So you can use the DCC instead of Ethernet or serial, which is nice as it frees up a port.
You might want to ask linaro-dev@lists about this and see if any of the kernel guys know about kernel support. A quick poke about shows that you can send the kernel's printf() style debug messages through it but little else.
Some patches were posted by Daniel Walker recently to expose the DCC as a true Linux serial port, and not only a debug channel for early printk's as it is right now.
Nicolas