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// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#include "core/core.h"
#include "core/hle/kernel/k_memory_layout.h"
#include "core/hle/kernel/k_process.h"
#include "core/hle/kernel/kernel.h"
#include "core/hle/kernel/svc.h"
#include "core/hle/kernel/svc_results.h"
#include "core/hle/kernel/svc_types.h"
namespace Kernel::Svc {
namespace {
constexpr bool IsValidSignalType(Svc::SignalType type) {
switch (type) {
case Svc::SignalType::Signal:
case Svc::SignalType::SignalAndIncrementIfEqual:
case Svc::SignalType::SignalAndModifyByWaitingCountIfEqual:
return true;
default:
return false;
}
}
constexpr bool IsValidArbitrationType(Svc::ArbitrationType type) {
switch (type) {
case Svc::ArbitrationType::WaitIfLessThan:
case Svc::ArbitrationType::DecrementAndWaitIfLessThan:
case Svc::ArbitrationType::WaitIfEqual:
return true;
default:
return false;
}
}
} // namespace
// Wait for an address (via Address Arbiter)
Result WaitForAddress(Core::System& system, VAddr address, ArbitrationType arb_type, s32 value,
s64 timeout_ns) {
LOG_TRACE(Kernel_SVC, "called, address=0x{:X}, arb_type=0x{:X}, value=0x{:X}, timeout_ns={}",
address, arb_type, value, timeout_ns);
// Validate input.
R_UNLESS(!IsKernelAddress(address), ResultInvalidCurrentMemory);
R_UNLESS(Common::IsAligned(address, sizeof(s32)), ResultInvalidAddress);
R_UNLESS(IsValidArbitrationType(arb_type), ResultInvalidEnumValue);
// Convert timeout from nanoseconds to ticks.
s64 timeout{};
if (timeout_ns > 0) {
const s64 offset_tick(timeout_ns);
if (offset_tick > 0) {
timeout = offset_tick + 2;
if (timeout <= 0) {
timeout = std::numeric_limits<s64>::max();
}
} else {
timeout = std::numeric_limits<s64>::max();
}
} else {
timeout = timeout_ns;
}
R_RETURN(
GetCurrentProcess(system.Kernel()).WaitAddressArbiter(address, arb_type, value, timeout));
}
// Signals to an address (via Address Arbiter)
Result SignalToAddress(Core::System& system, VAddr address, SignalType signal_type, s32 value,
s32 count) {
LOG_TRACE(Kernel_SVC, "called, address=0x{:X}, signal_type=0x{:X}, value=0x{:X}, count=0x{:X}",
address, signal_type, value, count);
// Validate input.
R_UNLESS(!IsKernelAddress(address), ResultInvalidCurrentMemory);
R_UNLESS(Common::IsAligned(address, sizeof(s32)), ResultInvalidAddress);
R_UNLESS(IsValidSignalType(signal_type), ResultInvalidEnumValue);
R_RETURN(GetCurrentProcess(system.Kernel())
.SignalAddressArbiter(address, signal_type, value, count));
}
Result WaitForAddress64(Core::System& system, VAddr address, ArbitrationType arb_type, s32 value,
s64 timeout_ns) {
R_RETURN(WaitForAddress(system, address, arb_type, value, timeout_ns));
}
Result SignalToAddress64(Core::System& system, VAddr address, SignalType signal_type, s32 value,
s32 count) {
R_RETURN(SignalToAddress(system, address, signal_type, value, count));
}
Result WaitForAddress64From32(Core::System& system, u32 address, ArbitrationType arb_type,
s32 value, s64 timeout_ns) {
R_RETURN(WaitForAddress(system, address, arb_type, value, timeout_ns));
}
Result SignalToAddress64From32(Core::System& system, u32 address, SignalType signal_type, s32 value,
s32 count) {
R_RETURN(SignalToAddress(system, address, signal_type, value, count));
}
} // namespace Kernel::Svc
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