the following patch was just integrated into master: commit fa4e269220a4c7d1ec5b03da23420bb7fc744646 Author: Duncan Laurie dlaurie@chromium.org Date: Mon Jul 16 12:19:00 2012 -0700
CPU: Add option to set TCC activation offset
The default TCC activation offset is 0, which means TCC activation starts at Tj_max. For devices with limited cooling ability it may be desired to lower TCC activation.
This adds an option that can be declared in the devicetree to set the TCC activation to a non-zero value.
Enable tcc_offset=15 in devicetree.cb and build/boot the BIOS and check that the value is set in the MSR:
> and $(shr $(rdmsr 0 0x1a2) 24) 0xf 0xf
Change-Id: I88f6857b40fd354f70fa9d5d9c1d8ceaea6dfcd1 Signed-off-by: Duncan Laurie dlaurie@chromium.org
Build-Tested: build bot (Jenkins) at Wed Jul 25 04:09:34 2012, giving +1 Reviewed-By: Ronald G. Minnich rminnich@gmail.com at Thu Jul 26 20:32:44 2012, giving +2 See http://review.coreboot.org/1343 for details.
-gerrit