mirror of https://git.suyu.dev/suyu/suyu
core: hle: kernel: Update KAddressArbiter.
This commit is contained in:
parent
b4e6d6c385
commit
952d1ac487
|
@ -157,6 +157,8 @@ add_library(core STATIC
|
|||
hle/kernel/handle_table.h
|
||||
hle/kernel/hle_ipc.cpp
|
||||
hle/kernel/hle_ipc.h
|
||||
hle/kernel/k_address_arbiter.cpp
|
||||
hle/kernel/k_address_arbiter.h
|
||||
hle/kernel/k_affinity_mask.h
|
||||
hle/kernel/k_condition_variable.cpp
|
||||
hle/kernel/k_condition_variable.h
|
||||
|
|
|
@ -0,0 +1,365 @@
|
|||
// Copyright 2021 yuzu Emulator Project
|
||||
// Licensed under GPLv2 or any later version
|
||||
// Refer to the license.txt file included.
|
||||
|
||||
#include "core/arm/exclusive_monitor.h"
|
||||
#include "core/core.h"
|
||||
#include "core/hle/kernel/k_address_arbiter.h"
|
||||
#include "core/hle/kernel/k_scheduler.h"
|
||||
#include "core/hle/kernel/k_scoped_scheduler_lock_and_sleep.h"
|
||||
#include "core/hle/kernel/kernel.h"
|
||||
#include "core/hle/kernel/svc_results.h"
|
||||
#include "core/hle/kernel/thread.h"
|
||||
#include "core/hle/kernel/time_manager.h"
|
||||
#include "core/memory.h"
|
||||
|
||||
namespace Kernel {
|
||||
|
||||
KAddressArbiter::KAddressArbiter(Core::System& system_)
|
||||
: system{system_}, kernel{system.Kernel()} {}
|
||||
KAddressArbiter::~KAddressArbiter() = default;
|
||||
|
||||
namespace {
|
||||
|
||||
bool ReadFromUser(Core::System& system, s32* out, VAddr address) {
|
||||
*out = system.Memory().Read32(address);
|
||||
return true;
|
||||
}
|
||||
|
||||
bool DecrementIfLessThan(Core::System& system, s32* out, VAddr address, s32 value) {
|
||||
auto& monitor = system.Monitor();
|
||||
const auto current_core = system.CurrentCoreIndex();
|
||||
|
||||
// TODO(bunnei): We should disable interrupts here via KScopedInterruptDisable.
|
||||
// TODO(bunnei): We should call CanAccessAtomic(..) here.
|
||||
|
||||
// Load the value from the address.
|
||||
const s32 current_value = static_cast<s32>(monitor.ExclusiveRead32(current_core, address));
|
||||
|
||||
// Compare it to the desired one.
|
||||
if (current_value < value) {
|
||||
// If less than, we want to try to decrement.
|
||||
const s32 decrement_value = current_value - 1;
|
||||
|
||||
// Decrement and try to store.
|
||||
if (!monitor.ExclusiveWrite32(current_core, address, static_cast<u32>(decrement_value))) {
|
||||
// If we failed to store, try again.
|
||||
DecrementIfLessThan(system, out, address, value);
|
||||
}
|
||||
} else {
|
||||
// Otherwise, clear our exclusive hold and finish
|
||||
monitor.ClearExclusive();
|
||||
}
|
||||
|
||||
// We're done.
|
||||
*out = current_value;
|
||||
return true;
|
||||
}
|
||||
|
||||
bool UpdateIfEqual(Core::System& system, s32* out, VAddr address, s32 value, s32 new_value) {
|
||||
auto& monitor = system.Monitor();
|
||||
const auto current_core = system.CurrentCoreIndex();
|
||||
|
||||
// TODO(bunnei): We should disable interrupts here via KScopedInterruptDisable.
|
||||
// TODO(bunnei): We should call CanAccessAtomic(..) here.
|
||||
|
||||
// Load the value from the address.
|
||||
const s32 current_value = static_cast<s32>(monitor.ExclusiveRead32(current_core, address));
|
||||
|
||||
// Compare it to the desired one.
|
||||
if (current_value == value) {
|
||||
// If equal, we want to try to write the new value.
|
||||
|
||||
// Try to store.
|
||||
if (!monitor.ExclusiveWrite32(current_core, address, static_cast<u32>(new_value))) {
|
||||
// If we failed to store, try again.
|
||||
UpdateIfEqual(system, out, address, value, new_value);
|
||||
}
|
||||
} else {
|
||||
// Otherwise, clear our exclusive hold and finish.
|
||||
monitor.ClearExclusive();
|
||||
}
|
||||
|
||||
// We're done.
|
||||
*out = current_value;
|
||||
return true;
|
||||
}
|
||||
|
||||
} // namespace
|
||||
|
||||
ResultCode KAddressArbiter::Signal(VAddr addr, s32 count) {
|
||||
// Perform signaling.
|
||||
s32 num_waiters{};
|
||||
{
|
||||
KScopedSchedulerLock sl(kernel);
|
||||
|
||||
auto it = thread_tree.nfind_light({addr, -1});
|
||||
while ((it != thread_tree.end()) && (count <= 0 || num_waiters < count) &&
|
||||
(it->GetAddressArbiterKey() == addr)) {
|
||||
Thread* target_thread = std::addressof(*it);
|
||||
target_thread->SetSyncedObject(nullptr, RESULT_SUCCESS);
|
||||
|
||||
ASSERT(target_thread->IsWaitingForAddressArbiter());
|
||||
target_thread->Wakeup();
|
||||
|
||||
it = thread_tree.erase(it);
|
||||
target_thread->ClearAddressArbiter();
|
||||
++num_waiters;
|
||||
}
|
||||
}
|
||||
return RESULT_SUCCESS;
|
||||
}
|
||||
|
||||
ResultCode KAddressArbiter::SignalAndIncrementIfEqual(VAddr addr, s32 value, s32 count) {
|
||||
// Perform signaling.
|
||||
s32 num_waiters{};
|
||||
{
|
||||
KScopedSchedulerLock sl(kernel);
|
||||
|
||||
// Check the userspace value.
|
||||
s32 user_value{};
|
||||
R_UNLESS(UpdateIfEqual(system, std::addressof(user_value), addr, value, value + 1),
|
||||
Svc::ResultInvalidCurrentMemory);
|
||||
R_UNLESS(user_value == value, Svc::ResultInvalidState);
|
||||
|
||||
auto it = thread_tree.nfind_light({addr, -1});
|
||||
while ((it != thread_tree.end()) && (count <= 0 || num_waiters < count) &&
|
||||
(it->GetAddressArbiterKey() == addr)) {
|
||||
Thread* target_thread = std::addressof(*it);
|
||||
target_thread->SetSyncedObject(nullptr, RESULT_SUCCESS);
|
||||
|
||||
ASSERT(target_thread->IsWaitingForAddressArbiter());
|
||||
target_thread->Wakeup();
|
||||
|
||||
it = thread_tree.erase(it);
|
||||
target_thread->ClearAddressArbiter();
|
||||
++num_waiters;
|
||||
}
|
||||
}
|
||||
return RESULT_SUCCESS;
|
||||
}
|
||||
|
||||
ResultCode KAddressArbiter::SignalAndModifyByWaitingCountIfEqual(VAddr addr, s32 value, s32 count) {
|
||||
// Perform signaling.
|
||||
s32 num_waiters{};
|
||||
{
|
||||
KScopedSchedulerLock sl(kernel);
|
||||
|
||||
auto it = thread_tree.nfind_light({addr, -1});
|
||||
// Determine the updated value.
|
||||
s32 new_value{};
|
||||
if (/*GetTargetFirmware() >= TargetFirmware_7_0_0*/ true) {
|
||||
if (count <= 0) {
|
||||
if ((it != thread_tree.end()) && (it->GetAddressArbiterKey() == addr)) {
|
||||
new_value = value - 2;
|
||||
} else {
|
||||
new_value = value + 1;
|
||||
}
|
||||
} else {
|
||||
if ((it != thread_tree.end()) && (it->GetAddressArbiterKey() == addr)) {
|
||||
auto tmp_it = it;
|
||||
s32 tmp_num_waiters{};
|
||||
while ((++tmp_it != thread_tree.end()) &&
|
||||
(tmp_it->GetAddressArbiterKey() == addr)) {
|
||||
if ((tmp_num_waiters++) >= count) {
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
if (tmp_num_waiters < count) {
|
||||
new_value = value - 1;
|
||||
} else {
|
||||
new_value = value;
|
||||
}
|
||||
} else {
|
||||
new_value = value + 1;
|
||||
}
|
||||
}
|
||||
} else {
|
||||
if (count <= 0) {
|
||||
if ((it != thread_tree.end()) && (it->GetAddressArbiterKey() == addr)) {
|
||||
new_value = value - 1;
|
||||
} else {
|
||||
new_value = value + 1;
|
||||
}
|
||||
} else {
|
||||
auto tmp_it = it;
|
||||
s32 tmp_num_waiters{};
|
||||
while ((tmp_it != thread_tree.end()) && (tmp_it->GetAddressArbiterKey() == addr) &&
|
||||
(tmp_num_waiters < count + 1)) {
|
||||
++tmp_num_waiters;
|
||||
++tmp_it;
|
||||
}
|
||||
|
||||
if (tmp_num_waiters == 0) {
|
||||
new_value = value + 1;
|
||||
} else if (tmp_num_waiters <= count) {
|
||||
new_value = value - 1;
|
||||
} else {
|
||||
new_value = value;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Check the userspace value.
|
||||
s32 user_value{};
|
||||
bool succeeded{};
|
||||
if (value != new_value) {
|
||||
succeeded = UpdateIfEqual(system, std::addressof(user_value), addr, value, new_value);
|
||||
} else {
|
||||
succeeded = ReadFromUser(system, std::addressof(user_value), addr);
|
||||
}
|
||||
|
||||
R_UNLESS(succeeded, Svc::ResultInvalidCurrentMemory);
|
||||
R_UNLESS(user_value == value, Svc::ResultInvalidState);
|
||||
|
||||
while ((it != thread_tree.end()) && (count <= 0 || num_waiters < count) &&
|
||||
(it->GetAddressArbiterKey() == addr)) {
|
||||
Thread* target_thread = std::addressof(*it);
|
||||
target_thread->SetSyncedObject(nullptr, RESULT_SUCCESS);
|
||||
|
||||
ASSERT(target_thread->IsWaitingForAddressArbiter());
|
||||
target_thread->Wakeup();
|
||||
|
||||
it = thread_tree.erase(it);
|
||||
target_thread->ClearAddressArbiter();
|
||||
++num_waiters;
|
||||
}
|
||||
}
|
||||
return RESULT_SUCCESS;
|
||||
}
|
||||
|
||||
ResultCode KAddressArbiter::WaitIfLessThan(VAddr addr, s32 value, bool decrement, s64 timeout) {
|
||||
// Prepare to wait.
|
||||
Thread* cur_thread = kernel.CurrentScheduler()->GetCurrentThread();
|
||||
Handle timer = InvalidHandle;
|
||||
|
||||
{
|
||||
KScopedSchedulerLockAndSleep slp(kernel, timer, cur_thread, timeout);
|
||||
|
||||
// Check that the thread isn't terminating.
|
||||
if (cur_thread->IsTerminationRequested()) {
|
||||
slp.CancelSleep();
|
||||
return Svc::ResultTerminationRequested;
|
||||
}
|
||||
|
||||
// Set the synced object.
|
||||
cur_thread->SetSyncedObject(nullptr, Svc::ResultTimedOut);
|
||||
|
||||
// Read the value from userspace.
|
||||
s32 user_value{};
|
||||
bool succeeded{};
|
||||
if (decrement) {
|
||||
succeeded = DecrementIfLessThan(system, std::addressof(user_value), addr, value);
|
||||
} else {
|
||||
succeeded = ReadFromUser(system, std::addressof(user_value), addr);
|
||||
}
|
||||
|
||||
if (!succeeded) {
|
||||
slp.CancelSleep();
|
||||
return Svc::ResultInvalidCurrentMemory;
|
||||
}
|
||||
|
||||
// Check that the value is less than the specified one.
|
||||
if (user_value >= value) {
|
||||
slp.CancelSleep();
|
||||
return Svc::ResultInvalidState;
|
||||
}
|
||||
|
||||
// Check that the timeout is non-zero.
|
||||
if (timeout == 0) {
|
||||
slp.CancelSleep();
|
||||
return Svc::ResultTimedOut;
|
||||
}
|
||||
|
||||
// Set the arbiter.
|
||||
cur_thread->SetAddressArbiter(std::addressof(thread_tree), addr);
|
||||
thread_tree.insert(*cur_thread);
|
||||
cur_thread->SetState(ThreadState::Waiting);
|
||||
}
|
||||
|
||||
// Cancel the timer wait.
|
||||
if (timer != InvalidHandle) {
|
||||
auto& time_manager = kernel.TimeManager();
|
||||
time_manager.UnscheduleTimeEvent(timer);
|
||||
}
|
||||
|
||||
// Remove from the address arbiter.
|
||||
{
|
||||
KScopedSchedulerLock sl(kernel);
|
||||
|
||||
if (cur_thread->IsWaitingForAddressArbiter()) {
|
||||
thread_tree.erase(thread_tree.iterator_to(*cur_thread));
|
||||
cur_thread->ClearAddressArbiter();
|
||||
}
|
||||
}
|
||||
|
||||
// Get the result.
|
||||
KSynchronizationObject* dummy{};
|
||||
return cur_thread->GetWaitResult(std::addressof(dummy));
|
||||
}
|
||||
|
||||
ResultCode KAddressArbiter::WaitIfEqual(VAddr addr, s32 value, s64 timeout) {
|
||||
// Prepare to wait.
|
||||
Thread* cur_thread = kernel.CurrentScheduler()->GetCurrentThread();
|
||||
Handle timer = InvalidHandle;
|
||||
|
||||
{
|
||||
KScopedSchedulerLockAndSleep slp(kernel, timer, cur_thread, timeout);
|
||||
|
||||
// Check that the thread isn't terminating.
|
||||
if (cur_thread->IsTerminationRequested()) {
|
||||
slp.CancelSleep();
|
||||
return Svc::ResultTerminationRequested;
|
||||
}
|
||||
|
||||
// Set the synced object.
|
||||
cur_thread->SetSyncedObject(nullptr, Svc::ResultTimedOut);
|
||||
|
||||
// Read the value from userspace.
|
||||
s32 user_value{};
|
||||
if (!ReadFromUser(system, std::addressof(user_value), addr)) {
|
||||
slp.CancelSleep();
|
||||
return Svc::ResultInvalidCurrentMemory;
|
||||
}
|
||||
|
||||
// Check that the value is equal.
|
||||
if (value != user_value) {
|
||||
slp.CancelSleep();
|
||||
return Svc::ResultInvalidState;
|
||||
}
|
||||
|
||||
// Check that the timeout is non-zero.
|
||||
if (timeout == 0) {
|
||||
slp.CancelSleep();
|
||||
return Svc::ResultTimedOut;
|
||||
}
|
||||
|
||||
// Set the arbiter.
|
||||
cur_thread->SetAddressArbiter(std::addressof(thread_tree), addr);
|
||||
thread_tree.insert(*cur_thread);
|
||||
cur_thread->SetState(ThreadState::Waiting);
|
||||
}
|
||||
|
||||
// Cancel the timer wait.
|
||||
if (timer != InvalidHandle) {
|
||||
auto& time_manager = kernel.TimeManager();
|
||||
time_manager.UnscheduleTimeEvent(timer);
|
||||
}
|
||||
|
||||
// Remove from the address arbiter.
|
||||
{
|
||||
KScopedSchedulerLock sl(kernel);
|
||||
|
||||
if (cur_thread->IsWaitingForAddressArbiter()) {
|
||||
thread_tree.erase(thread_tree.iterator_to(*cur_thread));
|
||||
cur_thread->ClearAddressArbiter();
|
||||
}
|
||||
}
|
||||
|
||||
// Get the result.
|
||||
KSynchronizationObject* dummy{};
|
||||
return cur_thread->GetWaitResult(std::addressof(dummy));
|
||||
}
|
||||
|
||||
} // namespace Kernel
|
|
@ -0,0 +1,70 @@
|
|||
// Copyright 2021 yuzu Emulator Project
|
||||
// Licensed under GPLv2 or any later version
|
||||
// Refer to the license.txt file included.
|
||||
|
||||
#pragma once
|
||||
|
||||
#include "common/assert.h"
|
||||
#include "common/common_types.h"
|
||||
#include "core/hle/kernel/k_condition_variable.h"
|
||||
#include "core/hle/kernel/svc_types.h"
|
||||
|
||||
union ResultCode;
|
||||
|
||||
namespace Core {
|
||||
class System;
|
||||
}
|
||||
|
||||
namespace Kernel {
|
||||
|
||||
class KernelCore;
|
||||
|
||||
class KAddressArbiter {
|
||||
public:
|
||||
using ThreadTree = KConditionVariable::ThreadTree;
|
||||
|
||||
explicit KAddressArbiter(Core::System& system_);
|
||||
~KAddressArbiter();
|
||||
|
||||
[[nodiscard]] ResultCode SignalToAddress(VAddr addr, Svc::SignalType type, s32 value,
|
||||
s32 count) {
|
||||
switch (type) {
|
||||
case Svc::SignalType::Signal:
|
||||
return Signal(addr, count);
|
||||
case Svc::SignalType::SignalAndIncrementIfEqual:
|
||||
return SignalAndIncrementIfEqual(addr, value, count);
|
||||
case Svc::SignalType::SignalAndModifyByWaitingCountIfEqual:
|
||||
return SignalAndModifyByWaitingCountIfEqual(addr, value, count);
|
||||
}
|
||||
UNREACHABLE();
|
||||
return RESULT_UNKNOWN;
|
||||
}
|
||||
|
||||
[[nodiscard]] ResultCode WaitForAddress(VAddr addr, Svc::ArbitrationType type, s32 value,
|
||||
s64 timeout) {
|
||||
switch (type) {
|
||||
case Svc::ArbitrationType::WaitIfLessThan:
|
||||
return WaitIfLessThan(addr, value, false, timeout);
|
||||
case Svc::ArbitrationType::DecrementAndWaitIfLessThan:
|
||||
return WaitIfLessThan(addr, value, true, timeout);
|
||||
case Svc::ArbitrationType::WaitIfEqual:
|
||||
return WaitIfEqual(addr, value, timeout);
|
||||
}
|
||||
UNREACHABLE();
|
||||
return RESULT_UNKNOWN;
|
||||
}
|
||||
|
||||
private:
|
||||
[[nodiscard]] ResultCode Signal(VAddr addr, s32 count);
|
||||
[[nodiscard]] ResultCode SignalAndIncrementIfEqual(VAddr addr, s32 value, s32 count);
|
||||
[[nodiscard]] ResultCode SignalAndModifyByWaitingCountIfEqual(VAddr addr, s32 value, s32 count);
|
||||
[[nodiscard]] ResultCode WaitIfLessThan(VAddr addr, s32 value, bool decrement, s64 timeout);
|
||||
[[nodiscard]] ResultCode WaitIfEqual(VAddr addr, s32 value, s64 timeout);
|
||||
|
||||
ThreadTree thread_tree;
|
||||
|
||||
Core::System& system;
|
||||
KernelCore& kernel;
|
||||
};
|
||||
|
||||
} // namespace Kernel
|
Loading…
Reference in New Issue