mirror of
https://github.com/EnderIce2/Fennix.git
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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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