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https://github.com/RGBCube/serenity
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fe2bd8e3dd
The APICTimer, HPET and RTC (the RTC timer is in the context of the PC RTC here) are timers that exist only in x86 platforms, therefore, we move the handling code and the initialization code to the Arch/x86/Time directory. Other related code patterns in the TimeManagement singleton and in the Random.cpp file are guarded with #ifdef to ensure they are only compiled for x86 builds.
83 lines
2.4 KiB
C++
83 lines
2.4 KiB
C++
/*
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* Copyright (c) 2020, Liav A. <liavalb@hotmail.co.il>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/OwnPtr.h>
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#include <AK/Types.h>
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#include <AK/Vector.h>
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#include <Kernel/Library/NonnullLockRefPtrVector.h>
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#include <Kernel/Memory/Region.h>
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#include <Kernel/PhysicalAddress.h>
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namespace Kernel {
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class HPETComparator;
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struct HPETRegistersBlock;
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class HPET {
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public:
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static bool initialized();
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static bool test_and_initialize();
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static bool check_for_exisiting_periodic_timers();
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static HPET& the();
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u64 frequency() const { return m_frequency; }
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u64 raw_counter_ticks_to_ns(u64) const;
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u64 ns_to_raw_counter_ticks(u64) const;
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NonnullLockRefPtrVector<HPETComparator> const& comparators() const { return m_comparators; }
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void disable(HPETComparator const&);
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void enable(HPETComparator const&);
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void update_periodic_comparator_value();
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void update_non_periodic_comparator_value(HPETComparator const& comparator);
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void set_comparator_irq_vector(u8 comparator_number, u8 irq_vector);
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void enable_periodic_interrupt(HPETComparator const& comparator);
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void disable_periodic_interrupt(HPETComparator const& comparator);
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u64 update_time(u64& seconds_since_boot, u32& ticks_this_second, bool query_only);
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u64 read_main_counter_unsafe() const;
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u64 read_main_counter() const;
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Vector<unsigned> capable_interrupt_numbers(u8 comparator_number);
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Vector<unsigned> capable_interrupt_numbers(HPETComparator const&);
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private:
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HPETRegistersBlock const& registers() const;
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HPETRegistersBlock& registers();
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void global_disable();
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void global_enable();
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bool is_periodic_capable(u8 comparator_number) const;
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bool is_64bit_capable(u8 comparator_number) const;
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void set_comparators_to_optimal_interrupt_state(size_t timers_count);
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u64 nanoseconds_to_raw_ticks() const;
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PhysicalAddress find_acpi_hpet_registers_block();
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explicit HPET(PhysicalAddress acpi_hpet);
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PhysicalAddress m_physical_acpi_hpet_table;
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PhysicalAddress m_physical_acpi_hpet_registers;
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OwnPtr<Memory::Region> m_hpet_mmio_region;
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u64 m_main_counter_last_read { 0 };
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u64 m_main_counter_drift { 0 };
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u32 m_32bit_main_counter_wraps { 0 };
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u16 m_vendor_id;
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u16 m_minimum_tick;
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u64 m_frequency;
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u8 m_revision_id;
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bool m_main_counter_64bits : 1;
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bool legacy_replacement_route_capable : 1;
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NonnullLockRefPtrVector<HPETComparator> m_comparators;
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};
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}
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