Several changes for timestamp bundle:

Fully defined the structure.
Single copy of it + single timer across all modules, managing it is now the responsibility of KernelState.

add global_critical_region::PrepareToAcquire, which uses Prefetchw on the global crit. We now know we can use Prefetchw on all cpus that have AVX.
add  KeQueryInterruptTime, which is used by some dashboards.

add threading::NanoSleep

src/xenia/base/clock_win.cc

@@ -47,5 +47,10 @@ uint64_t Clock::QueryHostSystemTime() {
 uint64_t Clock::QueryHostUptimeMillis() {
   return host_tick_count_platform() * 1000 / host_tick_frequency_platform();
 }
-
+// todo: we only take the low part of interrupttime! this is actually a 96-bit
+// int!
+uint64_t Clock::QueryHostInterruptTime() {
+  return *reinterpret_cast<uint64_t*>(KUserShared() +
+                                      KUSER_SHARED_INTERRUPTTIME_OFFSET);
+}
 }  // namespace xe