
30 Jun
2006
30 Jun
'06
4:01 a.m.
I'd like to use the logbuffer functionality in u-boot...
After #define'ing CONFIG_LOGBUFFER, I can successfully see our data getting printed to the reserved 16K region in dram. However, we want to grab that data back out after linux has booted.
During the various initializations that linux does on boot, (somewhere before init is actually run, I believe), the data in the 16K buffer at the end of dram gets over-written by somebody inside linux, and is lost.
I found a thread somewhere on the net where Wolfgang mentioned that linux needed a patch to be told not to intrude on those logbuffer pages, but nothing more than that.
Is there a proper way to handle this?
Thanks, - Michael R. Hines