mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
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62 lines
1.8 KiB
C++
62 lines
1.8 KiB
C++
/*
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* Copyright (c) 2019-2020 Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "hvisor_generic_timer.hpp"
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#include "hvisor_irq_manager.hpp"
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#include "hvisor_core_context.hpp"
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#include "cpu/hvisor_cpu_interrupt_mask_guard.hpp"
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#include "cpu/hvisor_cpu_instructions.hpp"
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#include <mutex>
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namespace ams::hvisor {
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void GenericTimer::Initialize()
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{
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Configure(false, false);
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if (currentCoreCtx->IsBootCore()) {
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m_timerFreq = THERMOSPHERE_GET_SYSREG(cntfrq_el0);
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}
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IrqManager::GetInstance().Register(*this, irqId, true);
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}
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std::optional<bool> GenericTimer::InterruptTopHalfHandler(u32 irqId, u32)
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{
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if (irqId != GenericTimer::irqId) {
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return std::nullopt;
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}
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// Mask the timer interrupt until reprogrammed
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Configure(false, false);
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return false;
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}
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void GenericTimer::WaitTicks(s64 ticks)
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{
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IrqManager::EnterInterruptibleHypervisorCode();
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auto flags = cpu::UnmaskIrq();
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SetTimeoutTicks(ticks);
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do {
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cpu::wfi();
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} while (!GetInterruptStatus());
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cpu::RestoreInterruptFlags(flags);
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}
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}
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