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kern: Implement exception vector ASM

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This commit is contained in:
Michael Scire
2020-02-08 02:49:32 -08:00
parent e330b6187f
commit 919b8124dc
26 changed files with 1497 additions and 60 deletions
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95
libraries/libmesosphere/source/arch/arm64/kern_k_interrupt_manager.cpp
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@@ -31,6 +31,101 @@ namespace ams::kern::arm64 {
this->interrupt_controller.Finalize(core_id);
}
bool KInterruptManager::OnHandleInterrupt() {
/* Get the interrupt id. */
const u32 raw_irq = this->interrupt_controller.GetIrq();
const s32 irq = KInterruptController::ConvertRawIrq(raw_irq);
/* If the IRQ is spurious, we don't need to reschedule. */
if (irq < 0) {
return false;
}
KInterruptTask *task = nullptr;
if (KInterruptController::IsLocal(irq)) {
/* Get local interrupt entry. */
auto &entry = GetLocalInterruptEntry(irq);
if (entry.handler != nullptr) {
/* Set manual clear needed if relevant. */
if (entry.manually_cleared) {
this->interrupt_controller.Disable(irq);
entry.needs_clear = true;
}
/* Set the handler. */
task = entry.handler->OnInterrupt(irq);
} else {
MESOSPHERE_LOG("Core%d: Unhandled local interrupt %d\n", GetCurrentCoreId(), irq);
}
} else if (KInterruptController::IsGlobal(irq)) {
KScopedSpinLock lk(GetLock());
/* Get global interrupt entry. */
auto &entry = GetGlobalInterruptEntry(irq);
if (entry.handler != nullptr) {
/* Set manual clear needed if relevant. */
if (entry.manually_cleared) {
this->interrupt_controller.Disable(irq);
entry.needs_clear = true;
}
/* Set the handler. */
task = entry.handler->OnInterrupt(irq);
} else {
MESOSPHERE_LOG("Core%d: Unhandled global interrupt %d\n", GetCurrentCoreId(), irq);
}
} else {
MESOSPHERE_LOG("Invalid interrupt %d\n", irq);
}
/* If we found no task, then we don't need to reschedule. */
if (task == nullptr) {
return false;
}
/* If the task isn't the dummy task, we should add it to the queue. */
if (task != GetDummyInterruptTask()) {
/* TODO: Kernel::GetInterruptTaskManager().Enqueue(task); */
}
return true;
}
void KInterruptManager::HandleInterrupt(bool user_mode) {
/* On interrupt, call OnHandleInterrupt() to determine if we need rescheduling and handle. */
const bool needs_scheduling = Kernel::GetInterruptManager().OnHandleInterrupt();
/* If we need scheduling, */
if (needs_scheduling) {
/* Handle any changes needed to the user preemption state. */
if (user_mode && GetCurrentThread().GetUserPreemptionState() != 0 && GetCurrentProcess().GetPreemptionStatePinnedThread(GetCurrentCoreId()) == nullptr) {
KScopedSchedulerLock sl;
/* Note the preemption state in process. */
GetCurrentProcess().SetPreemptionState();
/* Set the kernel preemption state flag. */
GetCurrentThread().SetKernelPreemptionState(1);;
/* Request interrupt scheduling. */
Kernel::GetScheduler().RequestScheduleOnInterrupt();
} else {
/* Request interrupt scheduling. */
Kernel::GetScheduler().RequestScheduleOnInterrupt();
}
}
/* If user mode, check if the thread needs termination. */
/* If it does, we can take advantage of this to terminate it. */
if (user_mode) {
KThread *cur_thread = GetCurrentThreadPointer();
if (cur_thread->IsTerminationRequested()) {
KScopedInterruptEnable ei;
cur_thread->Exit();
}
}
}
Result KInterruptManager::BindHandler(KInterruptHandler *handler, s32 irq, s32 core_id, s32 priority, bool manual_clear, bool level) {
R_UNLESS(KInterruptController::IsGlobal(irq) || KInterruptController::IsLocal(irq), svc::ResultOutOfRange());