with new kern/kern_cctr.c in TODO comments
- also replace struct cc_microtime_state member in struct cpu_info
with struct cctr_state defined in <sys/cctr.h>, which is unused yet
in this port
These sources are ported from FreeBSD/ia64 code.
See individual source files for credits.
In addition, code from NetBSD/alpha NetBSD/sparc64,
NetBSD/i386 and NetBSD/amd64 were used as templates,
along with my own additions.