PowerPC context switch question
dufault at hda.com
Tue Oct 13 16:38:07 UTC 2009
What does the stwu/ldzu do for us in _CPU_Context_switch()? I know
what it's doing, I'm interested in knowing why.
I assume it's setting up for the upcoming dcbz, right? Why do we do
the dcbz there? The next instruction won't start pulling that in
anyway? Are there alignment assumptions on the context area?
That sudden switch to "OFFSET-GP_18" had me puzzled for a while.
More information about the users