// Returns true if anything was executed.
bool __RunOnePendingInterrupt()
{
if (inInterrupt)
{
// Already in an interrupt! We'll keep going when it's done.
return false;
}
// Can easily prioritize between different kinds of interrupts if necessary.
if (pendingInterrupts.size())
{
PendingInterrupt pend = pendingInterrupts.front();
pendingInterrupts.pop_front();
intState.save();
pend.handler->copyArgsToCPU(pend);
currentMIPS->r[MIPS_REG_RA] = __KernelInterruptReturnAddress();
inInterrupt = true;
return true;
}
else
{
// DEBUG_LOG(HLE, "No more interrupts!");
return false;
}
}
void __KernelReturnFromInterrupt()
{
DEBUG_LOG(CPU, "Left interrupt handler at %08x", currentMIPS->pc);
// This is what we just ran.
PendingInterrupt pend = pendingInterrupts.front();
pendingInterrupts.pop_front();
intrHandlers[pend.intr]->handleResult(pend);
inInterrupt = false;
// Restore context after running the interrupt.
intState.restore();
// All should now be back to normal, including PC.
// Alright, let's see if there's any more interrupts queued...
if (!__RunOnePendingInterrupt())
{
// Otherwise, we reschedule when dispatch was enabled, or switch back otherwise.
if (__KernelIsDispatchEnabled())
__KernelReSchedule("return from interrupt");
else
__KernelSwitchToThread(threadBeforeInterrupt, "return from interrupt");
}
}
void __InterruptsInit()
{
interruptsEnabled = 1;
inInterrupt = false;
for(int i = 0; i < ARRAY_SIZE(intrHandlers); ++i)
intrHandlers[i] = new IntrHandler(i);
intState.clear();
}
void __KernelReturnFromInterrupt()
{
DEBUG_LOG(CPU, "Left interrupt handler at %08x", currentMIPS->pc);
inInterrupt = false;
// Restore context after running the interrupt.
intState.restore();
// All should now be back to normal, including PC.
// Alright, let's see if there's any more interrupts queued...
if (!__RunOnePendingInterrupt())
{
// Hmmm...
//__KernelReSchedule("return from interrupt");
}
}
void __InterruptsDoState(PointerWrap &p)
{
int numInterrupts = PSP_NUMBER_INTERRUPTS;
p.Do(numInterrupts);
if (numInterrupts != PSP_NUMBER_INTERRUPTS)
{
ERROR_LOG(HLE, "Savestate failure: wrong number of interrupts, can't load.");
return;
}
intState.DoState(p);
PendingInterrupt pi(0, 0);
p.Do(pendingInterrupts, pi);
p.Do(interruptsEnabled);
p.Do(inInterrupt);
p.DoMarker("sceKernelInterrupt");
}
// Returns true if anything was executed.
bool __RunOnePendingInterrupt()
{
bool needsThreadReturn = false;
if (inInterrupt || !interruptsEnabled) {
// Already in an interrupt! We'll keep going when it's done.
return false;
}
// Can easily prioritize between different kinds of interrupts if necessary.
retry:
if (!pendingInterrupts.empty()) {
PendingInterrupt pend = pendingInterrupts.front();
IntrHandler* handler = intrHandlers[pend.intr];
if (handler == NULL) {
WARN_LOG(SCEINTC, "Ignoring interrupt");
pendingInterrupts.pop_front();
goto retry;
}
// If we came from CoreTiming::Advance(), we might've come from a waiting thread's callback.
// To avoid "injecting" return values into our saved state, we context switch here.
SceUID savedThread = __KernelGetCurThread();
if (__KernelSwitchOffThread("interrupt")) {
threadBeforeInterrupt = savedThread;
needsThreadReturn = true;
}
intState.save();
inInterrupt = true;
if (!handler->run(pend)) {
pendingInterrupts.pop_front();
inInterrupt = false;
goto retry;
}
currentMIPS->r[MIPS_REG_RA] = __KernelInterruptReturnAddress();
return true;
} else {
if (needsThreadReturn)
__KernelSwitchToThread(threadBeforeInterrupt, "left interrupt");
// DEBUG_LOG(SCEINTC, "No more interrupts!");
return false;
}
}
void __KernelReturnFromInterrupt()
{
DEBUG_LOG(CPU, "Left interrupt handler at %08x", currentMIPS->pc);
// This is what we just ran.
PendingInterrupt pend = pendingInterrupts.front();
pendingInterrupts.pop_front();
intrHandlers[pend.intr]->handleResult(pend);
inInterrupt = false;
// Restore context after running the interrupt.
intState.restore();
// All should now be back to normal, including PC.
// Alright, let's see if there's any more interrupts queued...
if (!__RunOnePendingInterrupt())
__KernelReSchedule("return from interrupt");
}
void __InterruptsDoState(PointerWrap &p)
{
auto s = p.Section("sceKernelInterrupt", 1);
if (!s)
return;
int numInterrupts = PSP_NUMBER_INTERRUPTS;
p.Do(numInterrupts);
if (numInterrupts != PSP_NUMBER_INTERRUPTS)
{
p.SetError(p.ERROR_FAILURE);
ERROR_LOG(SCEINTC, "Savestate failure: wrong number of interrupts, can't load.");
return;
}
intState.DoState(p);
PendingInterrupt pi(0, 0);
p.Do(pendingInterrupts, pi);
p.Do(interruptsEnabled);
p.Do(inInterrupt);
p.Do(threadBeforeInterrupt);
}
void __KernelReturnFromInterrupt()
{
DEBUG_LOG(CPU, "Left interrupt handler at %08x", currentMIPS->pc);
inInterrupt = false;
// This is what we just ran.
PendingInterrupt pend = pendingInterrupts.front();
pendingInterrupts.pop_front();
SubIntrHandler *handler = intrHandlers[pend.intr].get(pend.subintr);
if (handler != NULL)
handler->handleResult(currentMIPS->r[MIPS_REG_V0]);
else
ERROR_LOG(HLE, "Interrupt released itself? Should not happen.");
// Restore context after running the interrupt.
intState.restore();
// All should now be back to normal, including PC.
// Alright, let's see if there's any more interrupts queued...
if (!__RunOnePendingInterrupt())
__KernelReSchedule("return from interrupt");
}
// Returns true if anything was executed.
bool __RunOnePendingInterrupt()
{
if (inInterrupt || !interruptsEnabled)
{
// Already in an interrupt! We'll keep going when it's done.
return false;
}
// Can easily prioritize between different kinds of interrupts if necessary.
retry:
if (pendingInterrupts.size())
{
// If we came from CoreTiming::Advance(), we might've come from a waiting thread's callback.
// To avoid "injecting" return values into our saved state, we context switch here.
__KernelSwitchOffThread("interrupt");
PendingInterrupt pend = pendingInterrupts.front();
SubIntrHandler *handler = intrHandlers[pend.intr].get(pend.subintr);
if (handler == NULL)
{
WARN_LOG(HLE, "Ignoring interrupt, already been released.");
pendingInterrupts.pop_front();
goto retry;
}
intState.save();
handler->copyArgsToCPU(pend);
currentMIPS->r[MIPS_REG_RA] = __KernelInterruptReturnAddress();
inInterrupt = true;
return true;
}
else
{
// DEBUG_LOG(HLE, "No more interrupts!");
return false;
}
}
void __InterruptsInit()
{
interruptsEnabled = 1;
inInterrupt = false;
intState.clear();
}
