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/*
* Copyright (c) 2020, Liav A. <liavalb@hotmail.co.il>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include <AK/NonnullRefPtrVector.h>
#include <AK/OwnPtr.h>
#include <AK/Types.h>
#include <AK/Vector.h>
#include <Kernel/PhysicalAddress.h>
#include <Kernel/VM/Region.h>
namespace Kernel {
class HPETComparator;
struct HPETRegistersBlock;
class HPET {
public:
static bool initialized();
static bool test_and_initialize();
static bool check_for_exisiting_periodic_timers();
static HPET& the();
u64 main_counter_value() const;
u64 frequency() const;
const NonnullRefPtrVector<HPETComparator>& comparators() const { return m_comparators; }
void disable(const HPETComparator&);
void enable(const HPETComparator&);
void set_periodic_comparator_value(const HPETComparator& comparator, u64 value);
void set_non_periodic_comparator_value(const HPETComparator& comparator, u64 value);
void set_comparator_irq_vector(u8 comparator_number, u8 irq_vector);
void enable_periodic_interrupt(const HPETComparator& comparator);
void disable_periodic_interrupt(const HPETComparator& comparator);
Vector<unsigned> capable_interrupt_numbers(u8 comparator_number);
Vector<unsigned> capable_interrupt_numbers(const HPETComparator&);
private:
const volatile HPETRegistersBlock& registers() const;
volatile HPETRegistersBlock& registers();
void global_disable();
void global_enable();
bool is_periodic_capable(u8 comparator_number) const;
void set_comparators_to_optimal_interrupt_state(size_t timers_count);
u64 calculate_ticks_in_nanoseconds() const;
PhysicalAddress find_acpi_hpet_registers_block();
explicit HPET(PhysicalAddress acpi_hpet);
PhysicalAddress m_physical_acpi_hpet_table;
PhysicalAddress m_physical_acpi_hpet_registers;
OwnPtr<Region> m_hpet_mmio_region;
u64 m_main_counter_clock_period { 0 };
u16 m_vendor_id;
u16 m_minimum_tick;
u64 m_frequency;
u8 m_revision_id;
bool counter_is_64_bit_capable : 1;
bool legacy_replacement_route_capable : 1;
NonnullRefPtrVector<HPETComparator> m_comparators;
};
}
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