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PatchEngine: Handle MSR more cleanly

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Instead of fiddling with the MSR value, just reschedule and try again
after the game fixes it itself.
This commit is contained in:
EmptyChaos 2016-09-24 15:14:51 +00:00
parent 83407263e5
commit c3cef54910
6 changed files with 46 additions and 33 deletions
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26
Source/Core/Core/HW/SystemTimers.cpp
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@ -166,11 +166,29 @@ s64 GetLocalTimeRTCOffset()
return s_localtime_rtc_offset;
}
static void PatchEngineCallback(u64 userdata, s64 cyclesLate)
static void PatchEngineCallback(u64 userdata, s64 cycles_late)
{
// Patch mem and run the Action Replay
PatchEngine::ApplyFramePatches();
CoreTiming::ScheduleEvent(VideoInterface::GetTicksPerField() - cyclesLate, et_PatchEngine);
// We have 2 periods, a 1000 cycle error period and the VI period.
// We have to carefully combine these together so that we stay on the VI period without drifting.
u32 vi_interval = VideoInterface::GetTicksPerField();
s64 cycles_pruned = (userdata + cycles_late) % vi_interval;
s64 next_schedule = 0;
// Try to patch mem and run the Action Replay
if (PatchEngine::ApplyFramePatches())
{
next_schedule = vi_interval - cycles_pruned;
cycles_pruned = 0;
}
else
{
// The patch failed, usually because the CPU is in an inappropriate state (interrupt handler).
// We'll try again after 1000 cycles.
next_schedule = 1000;
cycles_pruned += next_schedule;
}
CoreTiming::ScheduleEvent(next_schedule, et_PatchEngine, cycles_pruned);
}
static void ThrottleCallback(u64 last_time, s64 cyclesLate)