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// SPDX-FileCopyrightText: Copyright 2019 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#include "core/core.h"
#include "core/core_timing.h"
#include "core/hardware_properties.h"
#include "core/hle/kernel/kernel.h"
#include "core/hle/service/time/clock_types.h"
#include "core/hle/service/time/steady_clock_core.h"
#include "core/hle/service/time/time_sharedmemory.h"
namespace Service::Time {
static constexpr std::size_t SHARED_MEMORY_SIZE{0x1000};
SharedMemory::SharedMemory(Core::System& system_) : system(system_) {
std::memset(system.Kernel().GetTimeSharedMem().GetPointer(), 0, SHARED_MEMORY_SIZE);
}
SharedMemory::~SharedMemory() = default;
void SharedMemory::SetupStandardSteadyClock(const Common::UUID& clock_source_id,
Clock::TimeSpanType current_time_point) {
const Clock::TimeSpanType ticks_time_span{
Clock::TimeSpanType::FromTicks<Core::Hardware::CNTFREQ>(
system.CoreTiming().GetClockTicks())};
const Clock::SteadyClockContext context{
static_cast<u64>(current_time_point.nanoseconds - ticks_time_span.nanoseconds),
clock_source_id};
StoreToLockFreeAtomicType(&GetFormat()->standard_steady_clock_timepoint, context);
}
void SharedMemory::UpdateLocalSystemClockContext(const Clock::SystemClockContext& context) {
// lower and upper are related to the measurement point for the steady time point,
// and compare equal on boot
const s64 time_point_ns = context.steady_time_point.time_point * 1'000'000'000LL;
// This adjusts for some sort of time skew
// Both 0 on boot
const s64 diff_scale = 0;
const u32 shift_amount = 0;
const Clock::ContinuousAdjustmentTimePoint adjustment{
.measurement_offset = system.CoreTiming().GetGlobalTimeNs().count(),
.diff_scale = diff_scale,
.shift_amount = shift_amount,
.lower = time_point_ns,
.upper = time_point_ns,
.clock_source_id = context.steady_time_point.clock_source_id,
};
StoreToLockFreeAtomicType(&GetFormat()->continuous_adjustment_timepoint, adjustment);
StoreToLockFreeAtomicType(&GetFormat()->standard_local_system_clock_context, context);
}
void SharedMemory::UpdateNetworkSystemClockContext(const Clock::SystemClockContext& context) {
StoreToLockFreeAtomicType(&GetFormat()->standard_network_system_clock_context, context);
}
void SharedMemory::SetAutomaticCorrectionEnabled(bool is_enabled) {
StoreToLockFreeAtomicType(
&GetFormat()->is_standard_user_system_clock_automatic_correction_enabled, is_enabled);
}
SharedMemory::Format* SharedMemory::GetFormat() {
return reinterpret_cast<SharedMemory::Format*>(system.Kernel().GetTimeSharedMem().GetPointer());
}
} // namespace Service::Time
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