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/*
* ========================================================
*
* hCore
* Copyright 2024 Mahrouss Logic, all rights reserved.
*
* ========================================================
*/
#include <HALKit/AMD64/Processor.hpp>
#include <HALKit/AMD64/ACPI/ACPIManager.hpp>
///////////////////////////////////////////////////////////////////////////////////////
//! NOTE: fGSI stands 'Field Global System Interrupt'
namespace hCore::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";
struct Madt final
{
char fMag[4];
Int32 fLength;
char fRev;
struct MadtAddress final
{
UInt32 fPhysicalAddress;
UInt32 fFlags; // 1 = Dual Legacy PICs installed
Char fType;
Char fRecLen; // record length
};
};
struct MadtProcessorLocalApic final
{
Char fProcessorId;
Char fApicId;
UInt32 fFlags;
};
struct MadtIOApic final
{
Char fApicId;
Char fReserved;
UInt32 fAddress;
UInt32 fSystemInterruptBase;
};
struct MadtInterruptSource final
{
Char fBusSource;
Char fIrqSource;
UInt32 fGSI;
UInt16 fFlags;
};
struct MadtInterruptNmi final
{
Char fNmiSource;
Char fReserved;
UInt16 fFlags;
UInt32 fGSI;
};
struct MadtLocalApicAddressOverride final { UInt16 fResvered; UIntPtr fAddress; };
///////////////////////////////////////////////////////////////////////////////////////
static Madt kApicMadtList[256];
Madt* system_find_core(Madt* madt)
{
madt = madt + sizeof(Madt);
if (string_compare(madt->fMag, kApicSignature, string_length(kApicSignature)) == 0)
return madt;
return nullptr;
}
///////////////////////////////////////////////////////////////////////////////////////
void system_get_cores(voidPtr rsdPtr)
{
auto acpi = ACPIManager(rsdPtr);
kApicMadt = acpi.Find(kApicSignature).Leak().Leak();
MUST_PASS(kApicMadt); // MADT must exist.
SizeT counter = 0UL;
Madt* offset = system_find_core((Madt*)kApicMadt);
//! now find core addresses.
while (offset != nullptr)
{
// calls rt_copy_memory in NewC++
kApicMadtList[counter] = *offset;
offset = system_find_core(offset);
++counter;
}
}
}
///////////////////////////////////////////////////////////////////////////////////////
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