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/* -------------------------------------------
Copyright Zeta Electronics Corporation
------------------------------------------- */
#include <Builtins/ACPI/ACPIFactoryInterface.hxx>
#include <HALKit/AMD64/Processor.hpp>
#include <NewKit/KernelCheck.hpp>
#include <ArchKit/ArchKit.hpp>
#define kAPIC_ICR_Low 0x300
#define kAPIC_ICR_High 0x310
#define kAPIC_SIPI_Vector 0x00500
#define kAPIC_EIPI_Vector 0x00400
///////////////////////////////////////////////////////////////////////////////////////
//! NOTE: fGSI stands 'Field Global System Interrupt'
///////////////////////////////////////////////////////////////////////////////////////
namespace NewOS::HAL
{
constexpr Int32 kThreadAPIC = 0;
constexpr Int32 kThreadLAPIC = 1;
constexpr Int32 kThreadIOAPIC = 2;
constexpr Int32 kThreadAPIC64 = 3;
constexpr Int32 kThreadBoot = 4;
/*
*
* this is used to store info about the current running thread
* we use this struct to determine if we can use it, or mark it as used or on
* sleep.
*
*/
struct ProcessorInfoAMD64 final
{
Int32 ThreadType;
UIntPtr JumpAddress;
struct
{
UInt32 Code;
UInt32 Data;
UInt32 BSS;
} Selector;
};
STATIC voidPtr kApicMadt = nullptr;
STATIC const char* kApicSignature = "APIC";
/// @brief Multiple APIC Descriptor Table.
struct MadtType final : public SDT
{
struct MadtAddress final
{
Char RecordType;
Char RecordLen; // record length
UInt32 Address;
UInt32 Flags; // 1 = Dual Legacy PICs installed
} MadtRecords[];
};
struct MadtProcessorLocalApic final
{
Char AcpiProcessorId;
Char ApicId;
UInt32 Flags;
};
struct MadtIOApic final
{
Char ApicId;
Char Reserved;
UInt32 Address;
UInt32 SystemInterruptBase;
};
struct MadtInterruptSource final
{
Char BusSource;
Char IrqSource;
UInt32 GSI;
UInt16 Flags;
};
struct MadtInterruptNmi final
{
Char NmiSource;
Char Reserved;
UInt16 Flags;
UInt32 GSI;
};
struct MadtLocalApicAddressOverride final
{
UInt16 Resvered;
UIntPtr Address;
};
///////////////////////////////////////////////////////////////////////////////////////
STATIC MadtType* kApicInfoBlock = nullptr;
///////////////////////////////////////////////////////////////////////////////////////
/// @brief Send start IPI for CPU.
/// @param apicId
/// @param vector
/// @param targetAddress
/// @return
Void hal_send_start_ipi(UInt32 apicId, UInt8 vector, UInt32 targetAddress)
{
NewOS::ke_dma_write(targetAddress, kAPIC_ICR_High, apicId << 24);
NewOS::ke_dma_write(targetAddress, kAPIC_ICR_Low, kAPIC_SIPI_Vector | vector);
}
/// @brief Send end IPI for CPU.
/// @param apicId
/// @param vector
/// @param targetAddress
/// @return
Void hal_send_end_ipi(UInt32 apicId, UInt8 vector, UInt32 targetAddress)
{
NewOS::ke_dma_write(targetAddress, kAPIC_ICR_High, apicId << 24);
NewOS::ke_dma_write(targetAddress, kAPIC_ICR_Low, kAPIC_EIPI_Vector | vector);
}
Void hal_system_get_cores(voidPtr rsdPtr)
{
auto acpi = ACPIFactoryInterface(rsdPtr);
kApicMadt = acpi.Find(kApicSignature).Leak().Leak();
if (kApicMadt != nullptr)
{
MadtType* madt = (MadtType*)kApicMadt;
constexpr auto cMaxProbableCores = 4;
for (SizeT i = 0; i < cMaxProbableCores; ++i)
{
if (madt->MadtRecords[i].Flags == 0x01) // if local apic.
{
// then register as a core for scheduler.
kcout << "newoskrnl: register core as scheduler thread.\r";
}
}
}
else
{
kcout << "newoskrnl: APIC is not present! it is a vital component.\r";
ke_stop(RUNTIME_CHECK_FAILED);
}
}
} // namespace NewOS::HAL
///////////////////////////////////////////////////////////////////////////////////////
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