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[Kernel] Much better arbiter & thread scheduling impl

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wheremyfoodat 2022-10-10 16:41:08 +03:00
parent d777981204
commit 81b0f3dde0
8 changed files with 109 additions and 12 deletions
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27
src/core/kernel/address_arbiter.cpp
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@ -54,7 +54,7 @@ void Kernel::arbitrateAddress() {
regs[0] = SVCResult::InvalidEnumValueAlt;
return;
}
// This needs to put the error code in r0 before we change threats
// This needs to put the error code in r0 before we change threads
regs[0] = SVCResult::Success;
switch (static_cast<ArbitrationType>(type)) {
@ -68,11 +68,32 @@ void Kernel::arbitrateAddress() {
}
case ArbitrationType::Signal:
logSVC("Broken ArbitrateAddress (type == SIGNAL)\n");
switchThread(0);
signalArbiter(address, value);
break;
default:
Helpers::panic("ArbitrateAddress: Unimplemented type %s", arbitrationTypeToString(type));
}
}
// Signal up to "threadCount" threads waiting on the arbiter indicated by "waitingAddress"
void Kernel::signalArbiter(u32 waitingAddress, s32 threadCount) {
if (threadCount == 0) [[unlikely]] return;
s32 count = 0; // Number of threads we've woken up
// Wake threads with the highest priority threads being woken up first
for (auto index : threadIndices) {
Thread& t = threads[index];
if (t.status == ThreadStatus::WaitArbiter && t.waitingAddress == waitingAddress) {
t.status = ThreadStatus::Ready;
count += 1;
// Check if we've reached the max number of. If count < 0 then all threads are released.
if (count == threadCount && threadCount > 0) break;
}
}
if (count != 0) {
rescheduleThreads();
}
}