the following patch was just integrated into master: commit eb623ab2044f77648658f4b0763616f5e1bea57a Author: Gabe Black gabeblack@google.com Date: Sun Oct 6 10:54:53 2013 -0700
tegra124: Implement the monotonic timer by reading the 1us timer register.
It turns out there's a register in tegra which automatically counts at 1us increments. It's primarily intended for hardware to use (I think to drive other timers) but we can read it ourselves since a 1us timer is exactly what we need to support the monotonic timer API.
Change-Id: I68e947944acec7b460e61f42dbb325643a9739e8 Signed-off-by: Gabe Black gabeblack@google.com Reviewed-on: https://chromium-review.googlesource.com/172044 Reviewed-by: Ronald Minnich rminnich@chromium.org Reviewed-by: David Hendricks dhendrix@chromium.org Commit-Queue: Gabe Black gabeblack@chromium.org Tested-by: Gabe Black gabeblack@chromium.org (cherry picked from commit 161a39c53404ea0125221bbd54e54996967d6855) Signed-off-by: Isaac Christensen isaac.christensen@se-eng.com Reviewed-on: http://review.coreboot.org/6620 Reviewed-by: Ronald G. Minnich rminnich@gmail.com Tested-by: build bot (Jenkins)
See http://review.coreboot.org/6620 for details.
-gerrit