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// Copyright 2024-2025, Amlal El Mahrouss (amlal@nekernel.org)
// Licensed under the Apache License, Version 2.0 (see LICENSE file)
// Official repository: https://github.com/nekernel-org/nekernel
#include <ArchKit/ArchKit.h>
#include <HALKit/AMD64/Processor.h>
#include <KernelKit/HeapMgr.h>
#include <NeKit/KString.h>
#include <modules/ACPI/ACPIFactoryInterface.h>
namespace Kernel {
namespace Detail {
struct FADT final : public SDT {
UInt32 FirmwareCtrl;
UInt32 Dsdt;
// field used in ACPI 1.0; no longer in use, for compatibility only
UInt8 Reserved;
UInt8 PreferredPowerManagementProfile;
UInt16 SCI_Interrupt;
UInt32 SMI_CommandPort;
UInt8 AcpiEnable;
UInt8 AcpiDisable;
UInt8 S4BIOS_REQ;
UInt8 PSTATE_Control;
UInt32 PM1aEventBlock;
UInt32 PM1bEventBlock;
UInt32 PM1aControlBlock;
UInt32 PM1bControlBlock;
UInt32 PM2ControlBlock;
UInt32 PMTimerBlock;
UInt32 GPE0Block;
UInt32 GPE1Block;
UInt8 PM1EventLength;
UInt8 PM1ControlLength;
UInt8 PM2ControlLength;
UInt8 PMTimerLength;
UInt8 GPE0Length;
UInt8 GPE1Length;
UInt8 GPE1Base;
UInt8 CStateControl;
UInt16 WorstC2Latency;
UInt16 WorstC3Latency;
UInt16 FlushSize;
UInt16 FlushStride;
UInt8 DutyOffset;
UInt8 DutyWidth;
UInt8 DayAlarm;
UInt8 MonthAlarm;
UInt8 Century;
// reserved in ACPI 1.0; used since ACPI 2.0+
UInt16 BootArchitecturkMMFlags;
UInt8 Reserved2;
UInt32 Flags;
// 12 byte structure; see below for details
ACPI_ADDRESS ResetReg;
UInt8 ResetValue;
UInt8 Reserved3[3];
// 64bit pointers - Available on ACPI 2.0+
UInt64 X_FirmwareControl;
UInt64 X_Dsdt;
ACPI_ADDRESS X_PM1aEventBlock;
ACPI_ADDRESS X_PM1bEventBlock;
ACPI_ADDRESS X_PM1aControlBlock;
ACPI_ADDRESS X_PM1bControlBlock;
ACPI_ADDRESS X_PM2ControlBlock;
ACPI_ADDRESS X_PMTimerBlock;
ACPI_ADDRESS X_GPE0Block;
ACPI_ADDRESS X_GPE1Block;
};
} // namespace Detail
ACPIFactoryInterface::ACPIFactoryInterface(VoidPtr rsp_ptr) : fRsdp(rsp_ptr), fEntries(0) {}
Bool ACPIFactoryInterface::Shutdown() {
return NO;
}
/// @brief Reboot machine in either ACPI or by triple faulting.
/// @return nothing it's a reboot.
Void ACPIFactoryInterface::Reboot() {
asm volatile(
".intel_syntax noprefix; "
"rt_reset_hardware:; "
"cli; "
"wait_gate1: ; "
"in al,0x64 ; "
"and al,2 ; "
"jnz wait_gate1 ; "
"mov al,0x0D1 ; "
"out 0x64,al ; "
"wait_gate2: ; "
"in al,0x64 ; "
"and al,2 ; "
"jnz wait_gate2 ; "
"mov al,0x0FE ; "
"out 0x60,al ; "
"xor rax,rax ; "
"lidt [rax] ; "
"reset_wait: ; "
"jmp reset_wait ; "
".att_syntax; ");
}
} // namespace Kernel
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