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Architecture
Core
Crash
Driver
Memory
Time
HighPrecisionEventTimer.cpp
Time.cpp
TimeStampCounter.cpp
Timer.cpp
Video
CPU.cpp
Debugger.cpp
Disk.cpp
InterruptsManager.cpp
Lock.cpp
PeripheralComponentInterconnect.cpp
Power.cpp
README.md
Random.cpp
StackGuard.cpp
Symbols.cpp
SystemManagementBIOS.cpp
UndefinedBehaviorSanitization.c
UniversalAsynchronousReceiverTransmitter.cpp
crashhandler.hpp
smbios.hpp
ubsan.h
Execute
FileSystem
Files
GUI
Library
Network
Profiling
Recovery
SystemCalls
Tasking
Tests
include
include_std
.gitignore
DAPI.hpp
Doxyfile
Fex.hpp
Kernel.cpp
KernelConfig.cpp
KernelThread.cpp
LICENSE
Makefile
README.md
dump.sh
ipc.h
kernel.h
syscalls.h
90 lines
2.8 KiB
C++
90 lines
2.8 KiB
C++
/*
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This file is part of Fennix Kernel.
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Fennix Kernel is free software: you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation, either version 3 of
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the License, or (at your option) any later version.
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Fennix Kernel is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Fennix Kernel. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include <time.hpp>
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#include <memory.hpp>
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#include <debug.h>
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#include <io.h>
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#if defined(a64)
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#include "../../Architecture/amd64/acpi.hpp"
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#elif defined(a32)
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#include "../../Architecture/i386/acpi.hpp"
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#elif defined(aa64)
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#endif
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#include "../../kernel.h"
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namespace Time
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{
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bool HighPrecisionEventTimer::Sleep(uint64_t Duration, Units Unit)
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{
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#if defined(a86)
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uint64_t Target = mminq(&((HPET *)hpet)->MainCounterValue) + (Duration * ConvertUnit(Unit)) / clk;
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while (mminq(&((HPET *)hpet)->MainCounterValue) < Target)
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CPU::Pause();
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return true;
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#endif
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}
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uint64_t HighPrecisionEventTimer::GetCounter()
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{
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#if defined(a86)
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return mminq(&((HPET *)hpet)->MainCounterValue);
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#endif
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}
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uint64_t HighPrecisionEventTimer::CalculateTarget(uint64_t Target, Units Unit)
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{
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#if defined(a86)
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return mminq(&((HPET *)hpet)->MainCounterValue) + (Target * ConvertUnit(Unit)) / clk;
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#endif
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}
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uint64_t HighPrecisionEventTimer::GetNanosecondsSinceClassCreation()
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{
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#if defined(a86)
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uint64_t Subtraction = this->GetCounter() - this->ClassCreationTime;
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if (Subtraction <= 0 || this->clk <= 0)
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return 0;
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return Subtraction / (this->clk / ConvertUnit(Units::Nanoseconds));
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#endif
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}
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HighPrecisionEventTimer::HighPrecisionEventTimer(void *hpet)
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{
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#if defined(a86)
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ACPI::ACPI::HPETHeader *HPET_HDR = (ACPI::ACPI::HPETHeader *)hpet;
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Memory::Virtual().Remap((void *)HPET_HDR->Address.Address,
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(void *)HPET_HDR->Address.Address,
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Memory::PTFlag::RW | Memory::PTFlag::PCD);
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this->hpet = (HPET *)HPET_HDR->Address.Address;
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trace("%s timer is at address %016p", HPET_HDR->Header.OEMID, (void *)HPET_HDR->Address.Address);
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clk = s_cst(uint32_t, this->hpet->GeneralCapabilities >> 32);
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mmoutq(&this->hpet->GeneralConfiguration, 0);
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mmoutq(&this->hpet->MainCounterValue, 0);
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mmoutq(&this->hpet->GeneralConfiguration, 1);
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ClassCreationTime = this->GetCounter();
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#endif
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}
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HighPrecisionEventTimer::~HighPrecisionEventTimer()
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{
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}
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}
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