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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* 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/Types.h>
#include <Kernel/Time/HardwareTimer.h>
#include <Kernel/VM/MemoryManager.h>
namespace Kernel {
class APICTimer;
struct LocalAPIC {
u32 apic_id;
};
class APIC {
public:
static APIC& the();
static void initialize();
static bool initialized();
bool init_bsp();
void eoi();
void boot_aps();
void enable(u32 cpu);
void init_finished(u32 cpu);
void broadcast_ipi();
void send_ipi(u32 cpu);
static u8 spurious_interrupt_vector();
Thread* get_idle_thread(u32 cpu) const;
u32 enabled_processor_count() const { return m_processor_enabled_cnt; }
APICTimer* initialize_timers(HardwareTimerBase&);
APICTimer* get_timer() const { return m_apic_timer; }
enum class TimerMode {
OneShot,
Periodic,
TSCDeadline
};
void setup_local_timer(u32, TimerMode, bool);
u32 get_timer_current_count();
u32 get_timer_divisor();
private:
class ICRReg {
u32 m_low { 0 };
u32 m_high { 0 };
public:
enum DeliveryMode {
Fixed = 0x0,
LowPriority = 0x1,
SMI = 0x2,
NMI = 0x4,
INIT = 0x5,
StartUp = 0x6,
};
enum DestinationMode {
Physical = 0x0,
Logical = 0x1,
};
enum Level {
DeAssert = 0x0,
Assert = 0x1
};
enum class TriggerMode {
Edge = 0x0,
Level = 0x1,
};
enum DestinationShorthand {
NoShorthand = 0x0,
Self = 0x1,
AllIncludingSelf = 0x2,
AllExcludingSelf = 0x3,
};
ICRReg(u8 vector, DeliveryMode delivery_mode, DestinationMode destination_mode, Level level, TriggerMode trigger_mode, DestinationShorthand destinationShort, u8 destination = 0)
: m_low(vector | (delivery_mode << 8) | (destination_mode << 11) | (level << 14) | (static_cast<u32>(trigger_mode) << 15) | (destinationShort << 18))
, m_high((u32)destination << 24)
{
}
u32 low() const { return m_low; }
u32 high() const { return m_high; }
};
OwnPtr<Region> m_apic_base;
Vector<OwnPtr<Processor>> m_ap_processor_info;
Vector<Thread*> m_ap_idle_threads;
Atomic<u8> m_apic_ap_count { 0 };
Atomic<u8> m_apic_ap_continue { 0 };
u32 m_processor_cnt { 0 };
u32 m_processor_enabled_cnt { 0 };
APICTimer* m_apic_timer { nullptr };
static PhysicalAddress get_base();
static void set_base(const PhysicalAddress& base);
void write_register(u32 offset, u32 value);
u32 read_register(u32 offset);
void set_lvt(u32 offset, u8 interrupt);
void set_siv(u32 offset, u8 interrupt);
void wait_for_pending_icr();
void write_icr(const ICRReg& icr);
void do_boot_aps();
};
}
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