92 lines
2.7 KiB
C++
Executable File
92 lines
2.7 KiB
C++
Executable File
// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
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// SPDX-License-Identifier: GPL-2.0-or-later
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#ifdef ANDROID
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#include <sys/system_properties.h>
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#endif
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#include "common/arm64/native_clock.h"
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namespace Common::Arm64 {
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namespace {
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NativeClock::FactorType GetFixedPointFactor(u64 num, u64 den) {
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return (static_cast<NativeClock::FactorType>(num) << 64) / den;
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}
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u64 MultiplyHigh(u64 m, NativeClock::FactorType factor) {
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return static_cast<u64>((m * factor) >> 64);
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}
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} // namespace
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NativeClock::NativeClock() {
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const u64 host_cntfrq = GetHostCNTFRQ();
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ns_cntfrq_factor = GetFixedPointFactor(NsRatio::den, host_cntfrq);
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us_cntfrq_factor = GetFixedPointFactor(UsRatio::den, host_cntfrq);
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ms_cntfrq_factor = GetFixedPointFactor(MsRatio::den, host_cntfrq);
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guest_cntfrq_factor = GetFixedPointFactor(CNTFRQ, host_cntfrq);
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gputick_cntfrq_factor = GetFixedPointFactor(GPUTickFreq, host_cntfrq);
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}
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void NativeClock::Reset() {
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start_ticks = GetUptime();
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}
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std::chrono::nanoseconds NativeClock::GetTimeNS() const {
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return std::chrono::nanoseconds{MultiplyHigh(GetUptime(), ns_cntfrq_factor)};
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}
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std::chrono::microseconds NativeClock::GetTimeUS() const {
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return std::chrono::microseconds{MultiplyHigh(GetUptime(), us_cntfrq_factor)};
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}
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std::chrono::milliseconds NativeClock::GetTimeMS() const {
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return std::chrono::milliseconds{MultiplyHigh(GetUptime(), ms_cntfrq_factor)};
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}
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s64 NativeClock::GetCNTPCT() const {
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return MultiplyHigh(GetUptime() - start_ticks, guest_cntfrq_factor);
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}
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s64 NativeClock::GetGPUTick() const {
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return MultiplyHigh(GetUptime() - start_ticks, gputick_cntfrq_factor);
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}
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s64 NativeClock::GetUptime() const {
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s64 cntvct_el0 = 0;
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asm volatile("dsb ish\n\t"
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"mrs %[cntvct_el0], cntvct_el0\n\t"
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"dsb ish\n\t"
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: [cntvct_el0] "=r"(cntvct_el0));
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return cntvct_el0;
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}
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bool NativeClock::IsNative() const {
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return true;
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}
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s64 NativeClock::GetHostCNTFRQ() {
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u64 cntfrq_el0 = 0;
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std::string_view board{""};
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#ifdef ANDROID
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char buffer[PROP_VALUE_MAX];
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int len{__system_property_get("ro.product.board", buffer)};
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board = std::string_view(buffer, static_cast<size_t>(len));
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#endif
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if (board == "s5e9925") { // Exynos 2200
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cntfrq_el0 = 25600000;
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} else if (board == "exynos2100") { // Exynos 2100
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cntfrq_el0 = 26000000;
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} else if (board == "exynos9810") { // Exynos 9810
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cntfrq_el0 = 26000000;
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} else if (board == "s5e8825") { // Exynos 1280
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cntfrq_el0 = 26000000;
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} else {
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asm("mrs %[cntfrq_el0], cntfrq_el0" : [cntfrq_el0] "=r"(cntfrq_el0));
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}
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return cntfrq_el0;
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}
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} // namespace Common::Arm64
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