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Merge remote-tracking branch 'Kernel/multiboot2_64' into Kernel-multiboot2_64

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EnderIce2
2024-11-20 05:17:14 +02:00
parent c4e458fcc6 1a3bdbb843
commit eb154e337a
291 changed files with 54773 additions and 0 deletions
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384
Kernel/Architecture/amd64/cpu/AdvancedProgrammableInterruptController.cpp Normal file
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#include "apic.hpp"
#include <memory.hpp>
#include <uart.hpp>
#include <lock.hpp>
#include <cpu.hpp>
#include <smp.hpp>
#include <io.h>
#include "../../../kernel.h"
#include "../acpi.hpp"
NewLock(APICLock);
using namespace CPU::x64;
using namespace CPU::x86;
/*
In constructor ‘APIC::APIC::APIC(int)’:
warning: left shift count >= width of type
| APICBaseAddress = BaseStruct.ApicBaseLo << 12u | BaseStruct.ApicBaseHi << 32u;
| ~~~~~~~~~~~~~~~~~~~~~~^~~~~~
*/
#pragma GCC diagnostic ignored "-Wshift-count-overflow"
namespace APIC
{
// headache
// https://www.amd.com/system/files/TechDocs/24593.pdf
// https://www.naic.edu/~phil/software/intel/318148.pdf
uint32_t APIC::Read(uint32_t Register)
{
if (Register != APIC_ICRLO &&
Register != APIC_ICRHI &&
Register != APIC_ID)
debug("APIC::Read(%#lx) [x2=%d]", Register, x2APICSupported ? 1 : 0);
if (x2APICSupported)
{
if (Register != APIC_ICRHI)
return rdmsr((Register >> 4) + 0x800);
else
return rdmsr(0x30 + 0x800);
}
else
{
CPU::MemBar::Barrier();
uint32_t ret = *((volatile uint32_t *)((uintptr_t)APICBaseAddress + Register));
CPU::MemBar::Barrier();
return ret;
}
}
void APIC::Write(uint32_t Register, uint32_t Value)
{
if (Register != APIC_EOI &&
Register != APIC_TDCR &&
Register != APIC_TIMER &&
Register != APIC_TICR &&
Register != APIC_ICRLO &&
Register != APIC_ICRHI)
debug("APIC::Write(%#lx, %#lx) [x2=%d]", Register, Value, x2APICSupported ? 1 : 0);
if (x2APICSupported)
{
if (Register != APIC_ICRHI)
wrmsr((Register >> 4) + 0x800, Value);
else
wrmsr(MSR_X2APIC_ICR, Value);
}
else
{
CPU::MemBar::Barrier();
*((volatile uint32_t *)(((uintptr_t)APICBaseAddress) + Register)) = Value;
CPU::MemBar::Barrier();
}
}
void APIC::IOWrite(uint64_t Base, uint32_t Register, uint32_t Value)
{
debug("APIC::IOWrite(%#lx, %#lx, %#lx)", Base, Register, Value);
CPU::MemBar::Barrier();
*((volatile uint32_t *)(((uintptr_t)Base))) = Register;
CPU::MemBar::Barrier();
*((volatile uint32_t *)(((uintptr_t)Base + 16))) = Value;
CPU::MemBar::Barrier();
}
uint32_t APIC::IORead(uint64_t Base, uint32_t Register)
{
debug("APIC::IORead(%#lx, %#lx)", Base, Register);
CPU::MemBar::Barrier();
*((volatile uint32_t *)(((uintptr_t)Base))) = Register;
CPU::MemBar::Barrier();
uint32_t ret = *((volatile uint32_t *)(((uintptr_t)Base + 16)));
CPU::MemBar::Barrier();
return ret;
}
void APIC::EOI() { this->Write(APIC_EOI, 0); }
void APIC::WaitForIPI()
{
InterruptCommandRegisterLow icr = {.raw = 0};
do
{
icr.raw = this->Read(APIC_ICRLO);
} while (icr.DeliveryStatus != Idle);
}
void APIC::IPI(uint8_t CPU, InterruptCommandRegisterLow icr)
{
SmartCriticalSection(APICLock);
if (x2APICSupported)
{
fixme("Not implemented for x2APIC");
// wrmsr(MSR_X2APIC_ICR, ((uint64_t)CPU) << 32);
}
else
{
this->Write(APIC_ICRHI, (CPU << 24));
this->Write(APIC_ICRLO, icr.raw);
this->WaitForIPI();
}
}
void APIC::SendInitIPI(uint8_t CPU)
{
SmartCriticalSection(APICLock);
if (x2APICSupported)
{
fixme("Not implemented for x2APIC");
// wrmsr(MSR_X2APIC_ICR, ((uint64_t)CPU) << 32);
}
else
{
InterruptCommandRegisterLow icr = {.raw = 0};
icr.DeliveryMode = INIT;
icr.Level = Assert;
this->Write(APIC_ICRHI, (CPU << 24));
this->Write(APIC_ICRLO, icr.raw);
this->WaitForIPI();
}
}
void APIC::SendStartupIPI(uint8_t CPU, uint64_t StartupAddress)
{
SmartCriticalSection(APICLock);
if (x2APICSupported)
{
warn("Not tested for x2APIC");
wrmsr(MSR_X2APIC_ICR, ((uint64_t)CPU) << 32 | StartupAddress);
}
else
{
InterruptCommandRegisterLow icr = {.raw = 0};
icr.Vector = StartupAddress >> 12;
icr.DeliveryMode = Startup;
icr.Level = Assert;
this->Write(APIC_ICRHI, (CPU << 24));
this->Write(APIC_ICRLO, icr.raw);
this->WaitForIPI();
}
}
uint32_t APIC::IOGetMaxRedirect(uint32_t APICID)
{
uint32_t TableAddress = (this->IORead((((ACPI::MADT *)PowerManager->GetMADT())->ioapic[APICID]->Address), GetIOAPICVersion));
return ((IOAPICVersion *)&TableAddress)->MaximumRedirectionEntry;
}
void APIC::RawRedirectIRQ(uint8_t Vector, uint32_t GSI, uint16_t Flags, int CPU, int Status)
{
uint64_t Value = Vector;
int64_t IOAPICTarget = -1;
for (uint64_t i = 0; ((ACPI::MADT *)PowerManager->GetMADT())->ioapic[i] != 0; i++)
if (((ACPI::MADT *)PowerManager->GetMADT())->ioapic[i]->GSIBase <= GSI)
if (((ACPI::MADT *)PowerManager->GetMADT())->ioapic[i]->GSIBase + IOGetMaxRedirect(i) > GSI)
{
IOAPICTarget = i;
break;
}
if (IOAPICTarget == -1)
{
error("No ISO table found for I/O APIC");
return;
}
// TODO: IOAPICRedirectEntry Entry = {.raw = 0};
if (Flags & ActiveHighLow)
Value |= (1 << 13);
if (Flags & EdgeLevel)
Value |= (1 << 15);
if (!Status)
Value |= (1 << 16);
Value |= (((uintptr_t)CPU) << 56);
uint32_t IORegister = (GSI - ((ACPI::MADT *)PowerManager->GetMADT())->ioapic[IOAPICTarget]->GSIBase) * 2 + 16;
this->IOWrite(((ACPI::MADT *)PowerManager->GetMADT())->ioapic[IOAPICTarget]->Address, IORegister, (uint32_t)Value);
this->IOWrite(((ACPI::MADT *)PowerManager->GetMADT())->ioapic[IOAPICTarget]->Address, IORegister + 1, (uint32_t)(Value >> 32));
}
void APIC::RedirectIRQ(int CPU, uint8_t IRQ, int Status)
{
for (uint64_t i = 0; i < ((ACPI::MADT *)PowerManager->GetMADT())->iso.size(); i++)
if (((ACPI::MADT *)PowerManager->GetMADT())->iso[i]->IRQSource == IRQ)
{
debug("[ISO %d] Mapping to source IRQ%#d GSI:%#lx on CPU %d",
i, ((ACPI::MADT *)PowerManager->GetMADT())->iso[i]->IRQSource, ((ACPI::MADT *)PowerManager->GetMADT())->iso[i]->GSI, CPU);
this->RawRedirectIRQ(((ACPI::MADT *)PowerManager->GetMADT())->iso[i]->IRQSource + 0x20, ((ACPI::MADT *)PowerManager->GetMADT())->iso[i]->GSI, ((ACPI::MADT *)PowerManager->GetMADT())->iso[i]->Flags, CPU, Status);
return;
}
debug("Mapping IRQ%d on CPU %d", IRQ, CPU);
this->RawRedirectIRQ(IRQ + 0x20, IRQ, 0, CPU, Status);
}
void APIC::RedirectIRQs(int CPU)
{
SmartCriticalSection(APICLock);
debug("Redirecting IRQs...");
for (int i = 0; i < 16; i++)
this->RedirectIRQ(CPU, i, 1);
debug("Redirecting IRQs completed.");
}
APIC::APIC(int Core)
{
SmartCriticalSection(APICLock);
APIC_BASE BaseStruct = {.raw = rdmsr(MSR_APIC_BASE)};
uint64_t BaseLow = BaseStruct.ApicBaseLo;
uint64_t BaseHigh = BaseStruct.ApicBaseHi;
this->APICBaseAddress = BaseLow << 12u | BaseHigh << 32u;
trace("APIC Address: %#lx", this->APICBaseAddress);
bool x2APICSupported = false;
if (strcmp(CPU::Vendor(), x86_CPUID_VENDOR_AMD) == 0)
{
#if defined(a64)
CPU::x64::AMD::CPUID0x1 cpuid1amd;
#elif defined(a32)
CPU::x32::AMD::CPUID0x1 cpuid1amd;
#endif
#if defined(a64) || defined(a32)
asmv("cpuid"
: "=a"(cpuid1amd.EAX.raw), "=b"(cpuid1amd.EBX.raw), "=c"(cpuid1amd.ECX.raw), "=d"(cpuid1amd.EDX.raw)
: "a"(0x1));
#endif
// FIXME: Not sure if I configured this correctly or something else is wrong
// x2APICSupported = cpuid1amd.ECX.x2APIC;
fixme("AMD does even support x2APIC? ECX->Reserved10: %#lx", cpuid1amd.ECX.Reserved10);
}
else if (strcmp(CPU::Vendor(), x86_CPUID_VENDOR_INTEL) == 0)
{
#if defined(a64)
CPU::x64::Intel::CPUID0x1 cpuid1intel;
#elif defined(a32)
CPU::x32::Intel::CPUID0x1 cpuid1intel;
#endif
#if defined(a64) || defined(a32)
asmv("cpuid"
: "=a"(cpuid1intel.EAX.raw), "=b"(cpuid1intel.EBX.raw), "=c"(cpuid1intel.ECX.raw), "=d"(cpuid1intel.EDX.raw)
: "a"(0x1));
#endif
x2APICSupported = cpuid1intel.ECX.x2APIC;
}
if (x2APICSupported)
{
this->x2APICSupported = true;
wrmsr(MSR_APIC_BASE, (rdmsr(MSR_APIC_BASE) | (1 << 11)) & ~(1 << 10));
BaseStruct.EN = 1;
wrmsr(MSR_APIC_BASE, BaseStruct.raw);
}
else
{
BaseStruct.EN = 1;
wrmsr(MSR_APIC_BASE, BaseStruct.raw);
}
this->Write(APIC_TPR, 0x0);
// this->Write(APIC_SVR, this->Read(APIC_SVR) | 0x100); // 0x1FF or 0x100 ? on https://wiki.osdev.org/APIC is 0x100
if (!this->x2APICSupported)
{
this->Write(APIC_DFR, 0xF0000000);
this->Write(APIC_LDR, this->Read(APIC_ID));
}
ACPI::MADT *madt = (ACPI::MADT *)PowerManager->GetMADT();
for (size_t i = 0; i < madt->nmi.size(); i++)
{
if (madt->nmi[i]->processor != 0xFF && Core != madt->nmi[i]->processor)
return;
uint32_t nmi = 0x402;
if (madt->nmi[i]->flags & 2)
nmi |= 1 << 13;
if (madt->nmi[i]->flags & 8)
nmi |= 1 << 15;
if (madt->nmi[i]->lint == 0)
this->Write(APIC_LINT0, nmi);
else if (madt->nmi[i]->lint == 1)
this->Write(APIC_LINT1, nmi);
}
// Setup the spurrious interrupt vector
Spurious Spurious = {.raw = this->Read(APIC_SVR)};
Spurious.Vector = IRQ223; // TODO: Should I map the IRQ to something?
Spurious.Software = 1;
this->Write(APIC_SVR, Spurious.raw);
static int once = 0;
if (!once++)
{
// Disable PIT
outb(0x43, 0x28);
outb(0x40, 0x0);
// Disable PIC
outb(0x21, 0xFF);
outb(0xA1, 0xFF);
}
}
APIC::~APIC() {}
void Timer::OnInterruptReceived(TrapFrame *Frame) { UNUSED(Frame); }
void Timer::OneShot(uint32_t Vector, uint64_t Miliseconds)
{
SmartCriticalSection(APICLock);
LVTTimer timer = {.raw = 0};
timer.Vector = Vector;
timer.TimerMode = 0;
if (strcmp(CPU::Hypervisor(), x86_CPUID_VENDOR_TCG) != 0)
this->lapic->Write(APIC_TDCR, DivideBy128);
else
this->lapic->Write(APIC_TDCR, DivideBy16);
this->lapic->Write(APIC_TICR, Ticks * Miliseconds);
this->lapic->Write(APIC_TIMER, timer.raw);
}
Timer::Timer(APIC *apic) : Interrupts::Handler(IRQ0)
{
SmartCriticalSection(APICLock);
this->lapic = apic;
LVTTimerDivide Divider = DivideBy16;
trace("Initializing APIC timer on CPU %d", GetCurrentCPU()->ID);
this->lapic->Write(APIC_TDCR, Divider);
this->lapic->Write(APIC_TICR, 0xFFFFFFFF);
TimeManager->Sleep(1);
// Mask the timer
this->lapic->Write(APIC_TIMER, 0x10000 /* LVTTimer.Mask flag */);
Ticks = 0xFFFFFFFF - this->lapic->Read(APIC_TCCR);
// Config for IRQ0 timer
LVTTimer timer = {.raw = 0};
timer.Vector = IRQ0;
timer.Mask = Unmasked;
timer.TimerMode = LVTTimerMode::OneShot;
// Initialize APIC timer
this->lapic->Write(APIC_TDCR, Divider);
this->lapic->Write(APIC_TICR, Ticks);
this->lapic->Write(APIC_TIMER, timer.raw);
trace("%d APIC Timer %d ticks in.", GetCurrentCPU()->ID, Ticks);
KPrint("APIC Timer: \e8888FF%ld\eCCCCCC ticks.", Ticks);
}
Timer::~Timer()
{
}
}

164
Kernel/Architecture/amd64/cpu/GlobalDescriptorTable.cpp Normal file
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#include "gdt.hpp"
#include <memory.hpp>
#include <smp.hpp>
#include <cpu.hpp>
#include <debug.h>
namespace GlobalDescriptorTable
{
static GlobalDescriptorTableEntries GDTEntriesTemplate = {
// null
{.Length = 0x0,
.BaseLow = 0x0,
.BaseMiddle = 0x0,
.Access = {.Raw = 0x0},
.Flags = {.Raw = 0x0},
.BaseHigh = 0x0},
// kernel code
{.Length = 0x0,
.BaseLow = 0x0,
.BaseMiddle = 0x0,
.Access = {.A = 0,
.RW = 1,
.DC = 0,
.E = 1,
.S = 1,
.DPL = 0,
.P = 1},
.Flags = {.Unknown = 0x0, .L = 1},
.BaseHigh = 0x0},
// kernel data
{.Length = 0x0,
.BaseLow = 0x0,
.BaseMiddle = 0x0,
.Access = {.A = 0,
.RW = 1,
.DC = 0,
.E = 0,
.S = 1,
.DPL = 0,
.P = 1},
.Flags = {.Raw = 0x0},
.BaseHigh = 0x0},
// user data
{.Length = 0x0,
.BaseLow = 0x0,
.BaseMiddle = 0x0,
.Access = {.A = 0,
.RW = 1,
.DC = 0,
.E = 0,
.S = 1,
.DPL = 3,
.P = 1},
.Flags = {.Raw = 0x0},
.BaseHigh = 0x0},
// user code
{.Length = 0x0,
.BaseLow = 0x0,
.BaseMiddle = 0x0,
.Access = {.A = 0,
.RW = 1,
.DC = 0,
.E = 1,
.S = 1,
.DPL = 3,
.P = 1},
.Flags = {.Unknown = 0x0, .L = 1},
.BaseHigh = 0x0},
// tss
{}};
GlobalDescriptorTableEntries GDTEntries[MAX_CPU];
GlobalDescriptorTableDescriptor gdt[MAX_CPU];
TaskStateSegment tss[MAX_CPU] = {
0,
{0, 0, 0},
0,
{0, 0, 0, 0, 0, 0, 0},
0,
0,
0,
};
void *CPUStackPointer[MAX_CPU];
SafeFunction void Init(int Core)
{
memcpy(&GDTEntries[Core], &GDTEntriesTemplate, sizeof(GlobalDescriptorTableEntries));
gdt[Core] = {.Length = sizeof(GlobalDescriptorTableEntries) - 1, .Entries = &GDTEntries[Core]};
debug("Kernel: Code Access: %ld; Data Access: %ld", GDTEntries[Core].Code.Access.Raw, GDTEntries[Core].Data.Access.Raw);
debug("Kernel: Code Flags: %ld; Data Flags: %ld", GDTEntries[Core].Code.Flags.Raw, GDTEntries[Core].Data.Flags.Raw);
debug("User: Code Access: %ld; Data Access: %ld", GDTEntries[Core].UserCode.Access.Raw, GDTEntries[Core].UserData.Access.Raw);
debug("User: Code Flags: %ld; Data Flags: %ld", GDTEntries[Core].UserCode.Flags.Raw, GDTEntries[Core].UserData.Flags.Raw);
CPU::x64::lgdt(&gdt[Core]);
asmv("movq %%rsp, %%rax\n"
"pushq $16\n"
"pushq %%rax\n"
"pushfq\n"
"pushq $8\n"
"pushq $1f\n"
"iretq\n"
"1:\n"
"movw $16, %%ax\n"
"movw %%ax, %%ds\n"
"movw %%ax, %%es\n" ::
: "memory", "rax");
CPUStackPointer[Core] = KernelAllocator.RequestPages(TO_PAGES(STACK_SIZE));
memset(CPUStackPointer[Core], 0, STACK_SIZE);
debug("CPU %d Stack Pointer: %#lx", Core, CPUStackPointer[Core]);
uint64_t Base = (uint64_t)&tss[Core];
uint64_t Limit = Base + sizeof(TaskStateSegment);
gdt[Core].Entries->TaskStateSegment.Length = Limit & 0xFFFF;
gdt[Core].Entries->TaskStateSegment.BaseLow = Base & 0xFFFF;
gdt[Core].Entries->TaskStateSegment.BaseMiddle = (Base >> 16) & 0xFF;
gdt[Core].Entries->TaskStateSegment.BaseHigh = (Base >> 24) & 0xFF;
gdt[Core].Entries->TaskStateSegment.BaseUpper = (Base >> 32) & 0xFFFFFFFF;
gdt[Core].Entries->TaskStateSegment.Flags = {.A = 1, .RW = 0, .DC = 0, .E = 1, .S = 0, .DPL = 0, .P = 1};
gdt[Core].Entries->TaskStateSegment.Granularity = (0 << 4) | ((Limit >> 16) & 0xF);
tss[Core].IOMapBaseAddressOffset = sizeof(TaskStateSegment);
tss[Core].StackPointer[0] = (uint64_t)CPUStackPointer[Core] + STACK_SIZE;
tss[Core].InterruptStackTable[0] = (uint64_t)KernelAllocator.RequestPages(TO_PAGES(STACK_SIZE)) + STACK_SIZE;
tss[Core].InterruptStackTable[1] = (uint64_t)KernelAllocator.RequestPages(TO_PAGES(STACK_SIZE)) + STACK_SIZE;
tss[Core].InterruptStackTable[2] = (uint64_t)KernelAllocator.RequestPages(TO_PAGES(STACK_SIZE)) + STACK_SIZE;
memset((void *)(tss[Core].InterruptStackTable[0] - STACK_SIZE), 0, STACK_SIZE);
memset((void *)(tss[Core].InterruptStackTable[1] - STACK_SIZE), 0, STACK_SIZE);
memset((void *)(tss[Core].InterruptStackTable[2] - STACK_SIZE), 0, STACK_SIZE);
CPU::x64::ltr(GDT_TSS);
asmv("mov %%rsp, %0"
: "=r"(tss[Core].StackPointer[0]));
debug("GDT_KERNEL_CODE: %#lx", GDT_KERNEL_CODE);
debug("GDT_KERNEL_DATA: %#lx", GDT_KERNEL_DATA);
debug("GDT_USER_CODE: %#lx", GDT_USER_CODE);
debug("GDT_USER_DATA: %#lx", GDT_USER_DATA);
debug("GDT_TSS: %#lx", GDT_TSS);
debug("Global Descriptor Table initialized");
}
SafeFunction void SetKernelStack(void *Stack)
{
long CPUID = GetCurrentCPU()->ID;
if (Stack != nullptr)
tss[CPUID].StackPointer[0] = (uint64_t)Stack;
else
tss[CPUID].StackPointer[0] = (uint64_t)CPUStackPointer[CPUID] + STACK_SIZE;
// TODO: This may cause problems in the future I guess? This should be checked later
asmv("mov %%rsp, %0"
: "=r"(tss[CPUID].StackPointer[0]));
}
}

790
Kernel/Architecture/amd64/cpu/InterruptDescriptorTable.cpp Normal file
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#include "idt.hpp"
#include <memory.hpp>
#include <cpu.hpp>
#include <debug.h>
#include <io.h>
#include "gdt.hpp"
extern "C" void MainInterruptHandler(void *Data);
extern "C" void ExceptionHandler(void *Data);
namespace InterruptDescriptorTable
{
static InterruptDescriptorTableEntry Entries[0x100];
InterruptDescriptorTableDescriptor idtd = {.Length = sizeof(Entries) - 1,
.Entries = Entries};
void SetEntry(uint8_t Index,
void (*Base)(),
InterruptDescriptorTableFlags Attribute,
uint8_t InterruptStackTable,
InterruptDescriptorTableFlags Ring,
uint16_t SegmentSelector)
{
Entries[Index].BaseLow = (uint16_t)((uint64_t)Base & 0xFFFF);
Entries[Index].BaseHigh = (uint64_t)((uint64_t)Base >> 16 /* & 0xFFFF */);
Entries[Index].SegmentSelector = SegmentSelector;
Entries[Index].Flags = Attribute;
Entries[Index].Reserved1 = 0;
Entries[Index].Reserved2 = 0;
Entries[Index].Reserved3 = 0;
Entries[Index].InterruptStackTable = InterruptStackTable;
Entries[Index].Ring = Ring;
Entries[Index].Present = 1;
}
extern "C" __attribute__((naked, used, no_stack_protector)) void ExceptionHandlerStub()
{
asm(
// "cmp $0x1000, %rsp\n" // Just in case the stack is corrupted
// "jng .skip_swap_check_1\n" /* if is not greater than */
// "cmpw $0x8, 0x8(%rsp)\n"
// "je .skip_swap_check_1\n"
// "swapgs\n"
// ".skip_swap_check_1:\n"
"cld\n" // clear direction flag
// push all registers
"pushq %rax\n"
"pushq %rbx\n"
"pushq %rcx\n"
"pushq %rdx\n"
"pushq %rsi\n"
"pushq %rdi\n"
"pushq %rbp\n"
"pushq %r8\n"
"pushq %r9\n"
"pushq %r10\n"
"pushq %r11\n"
"pushq %r12\n"
"pushq %r13\n"
"pushq %r14\n"
"pushq %r15\n"
"movq %rsp, %rdi\n"
"call ExceptionHandler\n"
// pop all registers
"popq %r15\n"
"popq %r14\n"
"popq %r13\n"
"popq %r12\n"
"popq %r11\n"
"popq %r10\n"
"popq %r9\n"
"popq %r8\n"
"popq %rbp\n"
"popq %rdi\n"
"popq %rsi\n"
"popq %rdx\n"
"popq %rcx\n"
"popq %rbx\n"
"popq %rax\n"
"addq $16, %rsp\n"
// "cmp $0x1000, %rsp\n"
// "jng .skip_swap_check_2\n"
// "cmpw $0x8, 0x8(%rsp)\n"
// "je .skip_swap_check_2\n"
// "swapgs\n"
// ".skip_swap_check_2:\n"
"iretq"); // pop CS RIP RFLAGS SS RSP
}
extern "C" void WarnSwapgs() { warn("swapgs"); }
// void *OriginalCR3;
extern "C" __attribute__((naked, used, no_stack_protector)) void InterruptHandlerStub()
{
// // Store cr3 to OriginalCR3
// asmv("mov %%cr3, %0"
// : "=q"(OriginalCR3)
// :
// : "memory");
// // Set cr3 to KPT (Kernel Page Table)
// asmv("mov %0, %%cr3"
// :
// : "q"(KPT)
// : "memory");
// GlobalDescriptorTable::SetKernelStack(nullptr);
asm(
// "cmp $0x1000, %rsp\n"
// "jng .skip_swap_check__1\n"
// "cmpw $0x8, 0x8(%rsp)\n"
// "je .skip_swap_check__1\n"
// "swapgs\n"
// "call WarnSwapgs\n"
// ".skip_swap_check__1:\n"
"cld\n"
"pushq %rax\n"
"pushq %rbx\n"
"pushq %rcx\n"
"pushq %rdx\n"
"pushq %rsi\n"
"pushq %rdi\n"
"pushq %rbp\n"
"pushq %r8\n"
"pushq %r9\n"
"pushq %r10\n"
"pushq %r11\n"
"pushq %r12\n"
"pushq %r13\n"
"pushq %r14\n"
"pushq %r15\n"
"movq %rsp, %rdi\n"
"call MainInterruptHandler\n");
// // Check if the current cr3 is the same as the KPT
// // If not, then we need to restore the cr3
// asmv("pushq %rax\n" // push rax
// "pushq %rbx\n" // push rbx
// "movq %cr3, %rbx\n"); // mov cr3 to rbx
// asmv("movq %0, %%rax\n" // mov KPT to rax
// :
// : "q"(KPT)
// : "memory");
// asmv("cmpq %rax, %rbx\n" // compare cr3 to rax
// "jne .skip_restore_cr3\n"); // if not equal, skip restore cr3
// asmv("movq %0, %%cr3\n" // restore cr3
// :
// : "q"(OriginalCR3)
// : "memory");
// asm(".skip_restore_cr3:\n" // skip restore cr3 label
// "popq %rax\n" // KPT
// "popq %rbx\n"); // cr3
asm("popq %r15\n"
"popq %r14\n"
"popq %r13\n"
"popq %r12\n"
"popq %r11\n"
"popq %r10\n"
"popq %r9\n"
"popq %r8\n"
"popq %rbp\n"
"popq %rdi\n"
"popq %rsi\n"
"popq %rdx\n"
"popq %rcx\n"
"popq %rbx\n"
"popq %rax\n"
"addq $16, %rsp\n"
// "cmp $0x1000, %rsp\n"
// "jng .skip_swap_check__2\n"
// "cmpw $0x8, 0x8(%rsp)\n"
// "je .skip_swap_check__2\n"
// "call WarnSwapgs\n"
// "swapgs\n"
// ".skip_swap_check__2:\n"
"iretq");
}
#pragma region Exceptions
#define EXCEPTION_HANDLER(num) \
__attribute__((naked, no_stack_protector)) static void InterruptHandler_##num() \
{ \
asm("pushq $0\npushq $" #num "\n" \
"jmp ExceptionHandlerStub"); \
}
#define EXCEPTION_ERROR_HANDLER(num) \
__attribute__((naked, no_stack_protector)) static void InterruptHandler_##num() \
{ \
asm("pushq $" #num "\n" \
"jmp ExceptionHandlerStub"); \
}
#define INTERRUPT_HANDLER(num) \
__attribute__((naked, used, no_stack_protector)) void InterruptHandler_##num() \
{ \
asm("pushq $0\npushq $" #num "\n" \
"jmp InterruptHandlerStub\n"); \
}
/* ISR */
EXCEPTION_HANDLER(0x0);
EXCEPTION_HANDLER(0x1);
EXCEPTION_HANDLER(0x2);
EXCEPTION_HANDLER(0x3);
EXCEPTION_HANDLER(0x4);
EXCEPTION_HANDLER(0x5);
EXCEPTION_HANDLER(0x6);
EXCEPTION_HANDLER(0x7);
EXCEPTION_ERROR_HANDLER(0x8);
EXCEPTION_HANDLER(0x9);
EXCEPTION_ERROR_HANDLER(0xa);
EXCEPTION_ERROR_HANDLER(0xb);
EXCEPTION_ERROR_HANDLER(0xc);
EXCEPTION_ERROR_HANDLER(0xd);
EXCEPTION_ERROR_HANDLER(0xe);
EXCEPTION_HANDLER(0xf);
EXCEPTION_ERROR_HANDLER(0x10);
EXCEPTION_HANDLER(0x11);
EXCEPTION_HANDLER(0x12);
EXCEPTION_HANDLER(0x13);
EXCEPTION_HANDLER(0x14);
EXCEPTION_HANDLER(0x15);
EXCEPTION_HANDLER(0x16);
EXCEPTION_HANDLER(0x17);
EXCEPTION_HANDLER(0x18);
EXCEPTION_HANDLER(0x19);
EXCEPTION_HANDLER(0x1a);
EXCEPTION_HANDLER(0x1b);
EXCEPTION_HANDLER(0x1c);
EXCEPTION_HANDLER(0x1d);
EXCEPTION_HANDLER(0x1e);
EXCEPTION_HANDLER(0x1f);
/* IRQ */
INTERRUPT_HANDLER(0x20)
INTERRUPT_HANDLER(0x21)
INTERRUPT_HANDLER(0x22)
INTERRUPT_HANDLER(0x23)
INTERRUPT_HANDLER(0x24)
INTERRUPT_HANDLER(0x25)
INTERRUPT_HANDLER(0x26)
INTERRUPT_HANDLER(0x27)
INTERRUPT_HANDLER(0x28)
INTERRUPT_HANDLER(0x29)
INTERRUPT_HANDLER(0x2a)
INTERRUPT_HANDLER(0x2b)
INTERRUPT_HANDLER(0x2c)
INTERRUPT_HANDLER(0x2d)
INTERRUPT_HANDLER(0x2e)
INTERRUPT_HANDLER(0x2f)
/* Reserved by OS */
INTERRUPT_HANDLER(0x30)
INTERRUPT_HANDLER(0x31)
INTERRUPT_HANDLER(0x32)
INTERRUPT_HANDLER(0x33)
INTERRUPT_HANDLER(0x34)
INTERRUPT_HANDLER(0x35)
INTERRUPT_HANDLER(0x36)
INTERRUPT_HANDLER(0x37)
INTERRUPT_HANDLER(0x38)
INTERRUPT_HANDLER(0x39)
INTERRUPT_HANDLER(0x3a)
INTERRUPT_HANDLER(0x3b)
INTERRUPT_HANDLER(0x3c)
INTERRUPT_HANDLER(0x3d)
/* Free */
INTERRUPT_HANDLER(0x3e)
INTERRUPT_HANDLER(0x3f)
INTERRUPT_HANDLER(0x40)
INTERRUPT_HANDLER(0x41)
INTERRUPT_HANDLER(0x42)
INTERRUPT_HANDLER(0x43)
INTERRUPT_HANDLER(0x44)
INTERRUPT_HANDLER(0x45)
INTERRUPT_HANDLER(0x46)
INTERRUPT_HANDLER(0x47)
INTERRUPT_HANDLER(0x48)
INTERRUPT_HANDLER(0x49)
INTERRUPT_HANDLER(0x4a)
INTERRUPT_HANDLER(0x4b)
INTERRUPT_HANDLER(0x4c)
INTERRUPT_HANDLER(0x4d)
INTERRUPT_HANDLER(0x4e)
INTERRUPT_HANDLER(0x4f)
INTERRUPT_HANDLER(0x50)
INTERRUPT_HANDLER(0x51)
INTERRUPT_HANDLER(0x52)
INTERRUPT_HANDLER(0x53)
INTERRUPT_HANDLER(0x54)
INTERRUPT_HANDLER(0x55)
INTERRUPT_HANDLER(0x56)
INTERRUPT_HANDLER(0x57)
INTERRUPT_HANDLER(0x58)
INTERRUPT_HANDLER(0x59)
INTERRUPT_HANDLER(0x5a)
INTERRUPT_HANDLER(0x5b)
INTERRUPT_HANDLER(0x5c)
INTERRUPT_HANDLER(0x5d)
INTERRUPT_HANDLER(0x5e)
INTERRUPT_HANDLER(0x5f)
INTERRUPT_HANDLER(0x60)
INTERRUPT_HANDLER(0x61)
INTERRUPT_HANDLER(0x62)
INTERRUPT_HANDLER(0x63)
INTERRUPT_HANDLER(0x64)
INTERRUPT_HANDLER(0x65)
INTERRUPT_HANDLER(0x66)
INTERRUPT_HANDLER(0x67)
INTERRUPT_HANDLER(0x68)
INTERRUPT_HANDLER(0x69)
INTERRUPT_HANDLER(0x6a)
INTERRUPT_HANDLER(0x6b)
INTERRUPT_HANDLER(0x6c)
INTERRUPT_HANDLER(0x6d)
INTERRUPT_HANDLER(0x6e)
INTERRUPT_HANDLER(0x6f)
INTERRUPT_HANDLER(0x70)
INTERRUPT_HANDLER(0x71)
INTERRUPT_HANDLER(0x72)
INTERRUPT_HANDLER(0x73)
INTERRUPT_HANDLER(0x74)
INTERRUPT_HANDLER(0x75)
INTERRUPT_HANDLER(0x76)
INTERRUPT_HANDLER(0x77)
INTERRUPT_HANDLER(0x78)
INTERRUPT_HANDLER(0x79)
INTERRUPT_HANDLER(0x7a)
INTERRUPT_HANDLER(0x7b)
INTERRUPT_HANDLER(0x7c)
INTERRUPT_HANDLER(0x7d)
INTERRUPT_HANDLER(0x7e)
INTERRUPT_HANDLER(0x7f)
INTERRUPT_HANDLER(0x80)
INTERRUPT_HANDLER(0x81)
INTERRUPT_HANDLER(0x82)
INTERRUPT_HANDLER(0x83)
INTERRUPT_HANDLER(0x84)
INTERRUPT_HANDLER(0x85)
INTERRUPT_HANDLER(0x86)
INTERRUPT_HANDLER(0x87)
INTERRUPT_HANDLER(0x88)
INTERRUPT_HANDLER(0x89)
INTERRUPT_HANDLER(0x8a)
INTERRUPT_HANDLER(0x8b)
INTERRUPT_HANDLER(0x8c)
INTERRUPT_HANDLER(0x8d)
INTERRUPT_HANDLER(0x8e)
INTERRUPT_HANDLER(0x8f)
INTERRUPT_HANDLER(0x90)
INTERRUPT_HANDLER(0x91)
INTERRUPT_HANDLER(0x92)
INTERRUPT_HANDLER(0x93)
INTERRUPT_HANDLER(0x94)
INTERRUPT_HANDLER(0x95)
INTERRUPT_HANDLER(0x96)
INTERRUPT_HANDLER(0x97)
INTERRUPT_HANDLER(0x98)
INTERRUPT_HANDLER(0x99)
INTERRUPT_HANDLER(0x9a)
INTERRUPT_HANDLER(0x9b)
INTERRUPT_HANDLER(0x9c)
INTERRUPT_HANDLER(0x9d)
INTERRUPT_HANDLER(0x9e)
INTERRUPT_HANDLER(0x9f)
INTERRUPT_HANDLER(0xa0)
INTERRUPT_HANDLER(0xa1)
INTERRUPT_HANDLER(0xa2)
INTERRUPT_HANDLER(0xa3)
INTERRUPT_HANDLER(0xa4)
INTERRUPT_HANDLER(0xa5)
INTERRUPT_HANDLER(0xa6)
INTERRUPT_HANDLER(0xa7)
INTERRUPT_HANDLER(0xa8)
INTERRUPT_HANDLER(0xa9)
INTERRUPT_HANDLER(0xaa)
INTERRUPT_HANDLER(0xab)
INTERRUPT_HANDLER(0xac)
INTERRUPT_HANDLER(0xad)
INTERRUPT_HANDLER(0xae)
INTERRUPT_HANDLER(0xaf)
INTERRUPT_HANDLER(0xb0)
INTERRUPT_HANDLER(0xb1)
INTERRUPT_HANDLER(0xb2)
INTERRUPT_HANDLER(0xb3)
INTERRUPT_HANDLER(0xb4)
INTERRUPT_HANDLER(0xb5)
INTERRUPT_HANDLER(0xb6)
INTERRUPT_HANDLER(0xb7)
INTERRUPT_HANDLER(0xb8)
INTERRUPT_HANDLER(0xb9)
INTERRUPT_HANDLER(0xba)
INTERRUPT_HANDLER(0xbb)
INTERRUPT_HANDLER(0xbc)
INTERRUPT_HANDLER(0xbd)
INTERRUPT_HANDLER(0xbe)
INTERRUPT_HANDLER(0xbf)
INTERRUPT_HANDLER(0xc0)
INTERRUPT_HANDLER(0xc1)
INTERRUPT_HANDLER(0xc2)
INTERRUPT_HANDLER(0xc3)
INTERRUPT_HANDLER(0xc4)
INTERRUPT_HANDLER(0xc5)
INTERRUPT_HANDLER(0xc6)
INTERRUPT_HANDLER(0xc7)
INTERRUPT_HANDLER(0xc8)
INTERRUPT_HANDLER(0xc9)
INTERRUPT_HANDLER(0xca)
INTERRUPT_HANDLER(0xcb)
INTERRUPT_HANDLER(0xcc)
INTERRUPT_HANDLER(0xcd)
INTERRUPT_HANDLER(0xce)
INTERRUPT_HANDLER(0xcf)
INTERRUPT_HANDLER(0xd0)
INTERRUPT_HANDLER(0xd1)
INTERRUPT_HANDLER(0xd2)
INTERRUPT_HANDLER(0xd3)
INTERRUPT_HANDLER(0xd4)
INTERRUPT_HANDLER(0xd5)
INTERRUPT_HANDLER(0xd6)
INTERRUPT_HANDLER(0xd7)
INTERRUPT_HANDLER(0xd8)
INTERRUPT_HANDLER(0xd9)
INTERRUPT_HANDLER(0xda)
INTERRUPT_HANDLER(0xdb)
INTERRUPT_HANDLER(0xdc)
INTERRUPT_HANDLER(0xdd)
INTERRUPT_HANDLER(0xde)
INTERRUPT_HANDLER(0xdf)
INTERRUPT_HANDLER(0xe0)
INTERRUPT_HANDLER(0xe1)
INTERRUPT_HANDLER(0xe2)
INTERRUPT_HANDLER(0xe3)
INTERRUPT_HANDLER(0xe4)
INTERRUPT_HANDLER(0xe5)
INTERRUPT_HANDLER(0xe6)
INTERRUPT_HANDLER(0xe7)
INTERRUPT_HANDLER(0xe8)
INTERRUPT_HANDLER(0xe9)
INTERRUPT_HANDLER(0xea)
INTERRUPT_HANDLER(0xeb)
INTERRUPT_HANDLER(0xec)
INTERRUPT_HANDLER(0xed)
INTERRUPT_HANDLER(0xee)
INTERRUPT_HANDLER(0xef)
INTERRUPT_HANDLER(0xf0)
INTERRUPT_HANDLER(0xf1)
INTERRUPT_HANDLER(0xf2)
INTERRUPT_HANDLER(0xf3)
INTERRUPT_HANDLER(0xf4)
INTERRUPT_HANDLER(0xf5)
INTERRUPT_HANDLER(0xf6)
INTERRUPT_HANDLER(0xf7)
INTERRUPT_HANDLER(0xf8)
INTERRUPT_HANDLER(0xf9)
INTERRUPT_HANDLER(0xfa)
INTERRUPT_HANDLER(0xfb)
INTERRUPT_HANDLER(0xfc)
INTERRUPT_HANDLER(0xfd)
INTERRUPT_HANDLER(0xfe)
INTERRUPT_HANDLER(0xff)
#pragma endregion Exceptions
void Init(int Core)
{
UNUSED(Core);
static int once = 0;
if (!once++)
{
// PIC
outb(0x20, 0x10 | 0x1);
outb(0x80, 0);
outb(0xA0, 0x10 | 0x10);
outb(0x80, 0);
outb(0x21, 0x20);
outb(0x80, 0);
outb(0xA1, 0x28);
outb(0x80, 0);
outb(0x21, 0x04);
outb(0x80, 0);
outb(0xA1, 0x02);
outb(0x80, 0);
outb(0x21, 1);
outb(0x80, 0);
outb(0xA1, 1);
outb(0x80, 0);
// Masking and disabling PIC
outb(0x21, 0xff);
outb(0x80, 0);
outb(0xA1, 0xff);
}
/* ISR */
SetEntry(0x0, InterruptHandler_0x0, FlagGate_32BIT_TRAP, 1, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x1, InterruptHandler_0x1, FlagGate_32BIT_TRAP, 1, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x2, InterruptHandler_0x2, FlagGate_32BIT_TRAP, 2, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x3, InterruptHandler_0x3, FlagGate_32BIT_TRAP, 1, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x4, InterruptHandler_0x4, FlagGate_32BIT_TRAP, 1, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x5, InterruptHandler_0x5, FlagGate_32BIT_TRAP, 1, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x6, InterruptHandler_0x6, FlagGate_32BIT_TRAP, 1, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x7, InterruptHandler_0x7, FlagGate_32BIT_TRAP, 1, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x8, InterruptHandler_0x8, FlagGate_32BIT_TRAP, 3, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x9, InterruptHandler_0x9, FlagGate_32BIT_TRAP, 1, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xa, InterruptHandler_0xa, FlagGate_32BIT_TRAP, 1, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xb, InterruptHandler_0xb, FlagGate_32BIT_TRAP, 1, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xc, InterruptHandler_0xc, FlagGate_32BIT_TRAP, 3, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xd, InterruptHandler_0xd, FlagGate_32BIT_TRAP, 3, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xe, InterruptHandler_0xe, FlagGate_32BIT_TRAP, 3, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xf, InterruptHandler_0xf, FlagGate_32BIT_TRAP, 1, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x10, InterruptHandler_0x10, FlagGate_32BIT_TRAP, 1, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x11, InterruptHandler_0x11, FlagGate_32BIT_TRAP, 1, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x12, InterruptHandler_0x12, FlagGate_32BIT_TRAP, 1, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x13, InterruptHandler_0x13, FlagGate_32BIT_TRAP, 1, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x14, InterruptHandler_0x14, FlagGate_32BIT_TRAP, 1, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x15, InterruptHandler_0x15, FlagGate_32BIT_TRAP, 1, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x16, InterruptHandler_0x16, FlagGate_32BIT_TRAP, 1, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x17, InterruptHandler_0x17, FlagGate_32BIT_TRAP, 1, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x18, InterruptHandler_0x18, FlagGate_32BIT_TRAP, 1, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x19, InterruptHandler_0x19, FlagGate_32BIT_TRAP, 1, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x1a, InterruptHandler_0x1a, FlagGate_32BIT_TRAP, 1, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x1b, InterruptHandler_0x1b, FlagGate_32BIT_TRAP, 1, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x1c, InterruptHandler_0x1c, FlagGate_32BIT_TRAP, 1, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x1d, InterruptHandler_0x1d, FlagGate_32BIT_TRAP, 1, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x1e, InterruptHandler_0x1e, FlagGate_32BIT_TRAP, 1, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x1f, InterruptHandler_0x1f, FlagGate_32BIT_TRAP, 1, FlagGate_RING0, GDT_KERNEL_CODE);
/* IRQ */
SetEntry(0x20, InterruptHandler_0x20, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x21, InterruptHandler_0x21, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x22, InterruptHandler_0x22, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x23, InterruptHandler_0x23, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x24, InterruptHandler_0x24, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x25, InterruptHandler_0x25, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x26, InterruptHandler_0x26, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x27, InterruptHandler_0x27, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x28, InterruptHandler_0x28, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x29, InterruptHandler_0x29, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x2a, InterruptHandler_0x2a, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x2b, InterruptHandler_0x2b, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x2c, InterruptHandler_0x2c, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x2d, InterruptHandler_0x2d, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x2e, InterruptHandler_0x2e, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x2f, InterruptHandler_0x2f, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
/* Reserved by OS */
SetEntry(0x30, InterruptHandler_0x30, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x31, InterruptHandler_0x31, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x32, InterruptHandler_0x32, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x33, InterruptHandler_0x33, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x34, InterruptHandler_0x34, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x35, InterruptHandler_0x35, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x36, InterruptHandler_0x36, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x37, InterruptHandler_0x37, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x38, InterruptHandler_0x38, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x39, InterruptHandler_0x39, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x3a, InterruptHandler_0x3a, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x3b, InterruptHandler_0x3b, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x3c, InterruptHandler_0x3c, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x3d, InterruptHandler_0x3d, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
/* Free */
SetEntry(0x3e, InterruptHandler_0x3e, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x3f, InterruptHandler_0x3f, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x40, InterruptHandler_0x40, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x41, InterruptHandler_0x41, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x42, InterruptHandler_0x42, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x43, InterruptHandler_0x43, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x44, InterruptHandler_0x44, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x45, InterruptHandler_0x45, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x46, InterruptHandler_0x46, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x47, InterruptHandler_0x47, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x48, InterruptHandler_0x48, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x49, InterruptHandler_0x49, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x4a, InterruptHandler_0x4a, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x4b, InterruptHandler_0x4b, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x4c, InterruptHandler_0x4c, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x4d, InterruptHandler_0x4d, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x4e, InterruptHandler_0x4e, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x4f, InterruptHandler_0x4f, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x50, InterruptHandler_0x50, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x51, InterruptHandler_0x51, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x52, InterruptHandler_0x52, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x53, InterruptHandler_0x53, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x54, InterruptHandler_0x54, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x55, InterruptHandler_0x55, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x56, InterruptHandler_0x56, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x57, InterruptHandler_0x57, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x58, InterruptHandler_0x58, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x59, InterruptHandler_0x59, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x5a, InterruptHandler_0x5a, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x5b, InterruptHandler_0x5b, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x5c, InterruptHandler_0x5c, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x5d, InterruptHandler_0x5d, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x5e, InterruptHandler_0x5e, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x5f, InterruptHandler_0x5f, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x60, InterruptHandler_0x60, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x61, InterruptHandler_0x61, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x62, InterruptHandler_0x62, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x63, InterruptHandler_0x63, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x64, InterruptHandler_0x64, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x65, InterruptHandler_0x65, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x66, InterruptHandler_0x66, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x67, InterruptHandler_0x67, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x68, InterruptHandler_0x68, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x69, InterruptHandler_0x69, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x6a, InterruptHandler_0x6a, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x6b, InterruptHandler_0x6b, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x6c, InterruptHandler_0x6c, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x6d, InterruptHandler_0x6d, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x6e, InterruptHandler_0x6e, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x6f, InterruptHandler_0x6f, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x70, InterruptHandler_0x70, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x71, InterruptHandler_0x71, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x72, InterruptHandler_0x72, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x73, InterruptHandler_0x73, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x74, InterruptHandler_0x74, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x75, InterruptHandler_0x75, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x76, InterruptHandler_0x76, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x77, InterruptHandler_0x77, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x78, InterruptHandler_0x78, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x79, InterruptHandler_0x79, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x7a, InterruptHandler_0x7a, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x7b, InterruptHandler_0x7b, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x7c, InterruptHandler_0x7c, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x7d, InterruptHandler_0x7d, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x7e, InterruptHandler_0x7e, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x7f, InterruptHandler_0x7f, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x80, InterruptHandler_0x80, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x81, InterruptHandler_0x81, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x82, InterruptHandler_0x82, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x83, InterruptHandler_0x83, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x84, InterruptHandler_0x84, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x85, InterruptHandler_0x85, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x86, InterruptHandler_0x86, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x87, InterruptHandler_0x87, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x88, InterruptHandler_0x88, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x89, InterruptHandler_0x89, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x8a, InterruptHandler_0x8a, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x8b, InterruptHandler_0x8b, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x8c, InterruptHandler_0x8c, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x8d, InterruptHandler_0x8d, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x8e, InterruptHandler_0x8e, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x8f, InterruptHandler_0x8f, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x90, InterruptHandler_0x90, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x91, InterruptHandler_0x91, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x92, InterruptHandler_0x92, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x93, InterruptHandler_0x93, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x94, InterruptHandler_0x94, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x95, InterruptHandler_0x95, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x96, InterruptHandler_0x96, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x97, InterruptHandler_0x97, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x98, InterruptHandler_0x98, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x99, InterruptHandler_0x99, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x9a, InterruptHandler_0x9a, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x9b, InterruptHandler_0x9b, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x9c, InterruptHandler_0x9c, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x9d, InterruptHandler_0x9d, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x9e, InterruptHandler_0x9e, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0x9f, InterruptHandler_0x9f, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xa0, InterruptHandler_0xa0, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xa1, InterruptHandler_0xa1, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xa2, InterruptHandler_0xa2, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xa3, InterruptHandler_0xa3, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xa4, InterruptHandler_0xa4, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xa5, InterruptHandler_0xa5, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xa6, InterruptHandler_0xa6, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xa7, InterruptHandler_0xa7, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xa8, InterruptHandler_0xa8, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xa9, InterruptHandler_0xa9, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xaa, InterruptHandler_0xaa, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xab, InterruptHandler_0xab, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xac, InterruptHandler_0xac, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xad, InterruptHandler_0xad, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xae, InterruptHandler_0xae, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xaf, InterruptHandler_0xaf, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xb0, InterruptHandler_0xb0, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xb1, InterruptHandler_0xb1, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xb2, InterruptHandler_0xb2, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xb3, InterruptHandler_0xb3, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xb4, InterruptHandler_0xb4, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xb5, InterruptHandler_0xb5, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xb6, InterruptHandler_0xb6, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xb7, InterruptHandler_0xb7, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xb8, InterruptHandler_0xb8, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xb9, InterruptHandler_0xb9, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xba, InterruptHandler_0xba, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xbb, InterruptHandler_0xbb, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xbc, InterruptHandler_0xbc, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xbd, InterruptHandler_0xbd, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xbe, InterruptHandler_0xbe, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xbf, InterruptHandler_0xbf, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xc0, InterruptHandler_0xc0, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xc1, InterruptHandler_0xc1, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xc2, InterruptHandler_0xc2, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xc3, InterruptHandler_0xc3, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xc4, InterruptHandler_0xc4, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xc5, InterruptHandler_0xc5, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xc6, InterruptHandler_0xc6, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xc7, InterruptHandler_0xc7, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xc8, InterruptHandler_0xc8, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xc9, InterruptHandler_0xc9, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xca, InterruptHandler_0xca, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xcb, InterruptHandler_0xcb, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xcc, InterruptHandler_0xcc, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xcd, InterruptHandler_0xcd, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xce, InterruptHandler_0xce, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xcf, InterruptHandler_0xcf, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xd0, InterruptHandler_0xd0, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xd1, InterruptHandler_0xd1, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xd2, InterruptHandler_0xd2, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xd3, InterruptHandler_0xd3, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xd4, InterruptHandler_0xd4, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xd5, InterruptHandler_0xd5, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xd6, InterruptHandler_0xd6, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xd7, InterruptHandler_0xd7, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xd8, InterruptHandler_0xd8, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xd9, InterruptHandler_0xd9, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xda, InterruptHandler_0xda, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xdb, InterruptHandler_0xdb, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xdc, InterruptHandler_0xdc, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xdd, InterruptHandler_0xdd, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xde, InterruptHandler_0xde, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xdf, InterruptHandler_0xdf, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xe0, InterruptHandler_0xe0, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xe1, InterruptHandler_0xe1, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xe2, InterruptHandler_0xe2, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xe3, InterruptHandler_0xe3, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xe4, InterruptHandler_0xe4, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xe5, InterruptHandler_0xe5, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xe6, InterruptHandler_0xe6, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xe7, InterruptHandler_0xe7, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xe8, InterruptHandler_0xe8, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xe9, InterruptHandler_0xe9, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xea, InterruptHandler_0xea, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xeb, InterruptHandler_0xeb, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xec, InterruptHandler_0xec, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xed, InterruptHandler_0xed, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xee, InterruptHandler_0xee, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xef, InterruptHandler_0xef, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xf0, InterruptHandler_0xf0, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xf1, InterruptHandler_0xf1, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xf2, InterruptHandler_0xf2, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xf3, InterruptHandler_0xf3, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xf4, InterruptHandler_0xf4, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xf5, InterruptHandler_0xf5, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xf6, InterruptHandler_0xf6, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xf7, InterruptHandler_0xf7, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xf8, InterruptHandler_0xf8, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xf9, InterruptHandler_0xf9, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xfa, InterruptHandler_0xfa, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xfb, InterruptHandler_0xfb, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xfc, InterruptHandler_0xfc, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xfd, InterruptHandler_0xfd, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xfe, InterruptHandler_0xfe, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
SetEntry(0xff, InterruptHandler_0xff, FlagGate_32BIT_TRAP, 0, FlagGate_RING0, GDT_KERNEL_CODE);
CPU::x64::lidt(&idtd);
}
}

113
Kernel/Architecture/amd64/cpu/SMPTrampoline.asm Normal file
View File

@@ -0,0 +1,113 @@
[bits 16]
TRAMPOLINE_BASE equ 0x2000
extern StartCPU
global _trampoline_start
_trampoline_start:
cli
mov ax, 0x0
mov ds, ax
mov es, ax
mov fs, ax
mov gs, ax
mov ss, ax
o32 lgdt [ProtectedMode_gdtr - _trampoline_start + TRAMPOLINE_BASE]
mov eax, cr0
or al, 0x1
mov cr0, eax
jmp 0x8:(Trampoline32 - _trampoline_start + TRAMPOLINE_BASE)
[bits 32]
section .text
Trampoline32:
mov bx, 0x10
mov ds, bx
mov es, bx
mov ss, bx
mov eax, dword [0x500]
mov cr3, eax
mov eax, cr4
or eax, 1 << 5 ; Set the PAE-bit, which is the 6th bit (bit 5).
or eax, 1 << 7
mov cr4, eax
mov ecx, 0xc0000080
rdmsr
or eax,1 << 8 ; LME
wrmsr
mov eax, cr0
or eax, 1 << 31
mov cr0, eax
lgdt [LongMode_gdtr - _trampoline_start + TRAMPOLINE_BASE]
jmp 0x8:(Trampoline64 - _trampoline_start + TRAMPOLINE_BASE)
[bits 64]
Trampoline64:
mov ax, 0x10
mov ds, ax
mov es, ax
mov ss, ax
mov ax, 0x0
mov fs, ax
mov gs, ax
lgdt [0x580]
lidt [0x590]
mov rsp, [0x570]
mov rbp, 0x0 ; Terminate stack traces here.
; Reset RFLAGS.
push 0x0
popf
mov rax, qword vcode64
call vcode64
vcode64:
push rbp
; Set up SSE
mov rax, cr0
; btr eax, 2
; bts eax, 1
; mov cr0, rax
mov rax, cr4
bts eax, 9
bts eax, 10
mov cr4, rax
mov rax, qword TrampolineExit
call rax
align 16
LongMode_gdtr:
dw LongModeGDTEnd - LongModeGDTStart - 1
dq LongModeGDTStart - _trampoline_start + TRAMPOLINE_BASE
align 16
LongModeGDTStart:
dq 0 ; NULL segment
dq 0x00AF98000000FFFF ; Code segment
dq 0x00CF92000000FFFF ; Data segment
LongModeGDTEnd:
align 16
ProtectedMode_gdtr:
dw ProtectedModeGDTEnd - ProtectedModeGDTStart - 1
dd ProtectedModeGDTStart - _trampoline_start + TRAMPOLINE_BASE
align 16
ProtectedModeGDTStart:
dq 0 ; NULL segment
dq 0x00CF9A000000FFFF ; Code segment
dq 0x00CF92000000FFFF ; Data segment
ProtectedModeGDTEnd:
align 16
ProtectedMode_idtr:
dw 0
dd 0
dd 0
align 16
global _trampoline_end
_trampoline_end:
TrampolineExit:
call StartCPU
times 512 - ($-$$) db 0

119
Kernel/Architecture/amd64/cpu/SymmetricMultiprocessing.cpp Normal file
View File

@@ -0,0 +1,119 @@
#include <smp.hpp>
#include <ints.hpp>
#include <memory.hpp>
#include <assert.h>
#include <cpu.hpp>
#include "../../../kernel.h"
#include "../acpi.hpp"
#include "apic.hpp"
extern "C" uint64_t _trampoline_start, _trampoline_end;
enum SMPTrampolineAddress
{
PAGE_TABLE = 0x500,
START_ADDR = 0x520,
STACK = 0x570,
GDT = 0x580,
IDT = 0x590,
CORE = 0x600,
TRAMPOLINE_START = 0x2000
};
volatile bool CPUEnabled = false;
#pragma GCC diagnostic ignored "-Wmissing-field-initializers"
static __attribute__((aligned(PAGE_SIZE))) CPUData CPUs[MAX_CPU] = {0};
SafeFunction CPUData *GetCPU(long id) { return &CPUs[id]; }
SafeFunction CPUData *GetCurrentCPU()
{
if (unlikely(!Interrupts::apic[0]))
return &CPUs[0]; /* No APIC means we are on the BSP. */
int CoreID = ((APIC::APIC *)Interrupts::apic[0])->Read(APIC::APIC_ID) >> 24;
if (unlikely((&CPUs[CoreID])->IsActive != true))
{
error("CPU %d is not active!", CoreID);
assert((&CPUs[0])->IsActive == true); /* We can't continue without the BSP. */
return &CPUs[0];
}
assert((&CPUs[CoreID])->Checksum == CPU_DATA_CHECKSUM); /* This should never happen. */
return &CPUs[CoreID];
}
extern "C" void StartCPU()
{
CPU::Interrupts(CPU::Disable);
uint64_t CoreID = (int)*reinterpret_cast<int *>(CORE);
CPU::InitializeFeatures(CoreID);
// Initialize GDT and IDT
Interrupts::Initialize(CoreID);
Interrupts::Enable(CoreID);
Interrupts::InitializeTimer(CoreID);
CPU::Interrupts(CPU::Enable);
KPrint("\e058C19CPU \e8888FF%d \e058C19is online", CoreID);
CPUEnabled = true;
CPU::Halt(true);
}
namespace SMP
{
int CPUCores = 0;
void Initialize(void *madt)
{
int Cores = ((ACPI::MADT *)madt)->CPUCores + 1;
if (Config.Cores > ((ACPI::MADT *)madt)->CPUCores + 1)
KPrint("More cores requested than available. Using %d cores", ((ACPI::MADT *)madt)->CPUCores + 1);
else if (Config.Cores != 0)
Cores = Config.Cores;
CPUCores = Cores;
for (int i = 0; i < Cores; i++)
{
debug("Initializing CPU %d", i);
if ((((APIC::APIC *)Interrupts::apic[0])->Read(APIC::APIC_ID) >> 24) != ((ACPI::MADT *)madt)->lapic[i]->ACPIProcessorId)
{
((APIC::APIC *)Interrupts::apic[0])->Write(APIC::APIC_ICRHI, (((ACPI::MADT *)madt)->lapic[i]->APICId << 24));
((APIC::APIC *)Interrupts::apic[0])->Write(APIC::APIC_ICRLO, 0x500);
Memory::Virtual().Map(0x0, 0x0, Memory::PTFlag::RW | Memory::PTFlag::US);
uint64_t TrampolineLength = (uintptr_t)&_trampoline_end - (uintptr_t)&_trampoline_start;
for (uint64_t i = 0; i < (TrampolineLength / PAGE_SIZE) + 2; i++)
Memory::Virtual().Map((void *)(TRAMPOLINE_START + (i * PAGE_SIZE)), (void *)(TRAMPOLINE_START + (i * PAGE_SIZE)), Memory::PTFlag::RW | Memory::PTFlag::US);
memcpy((void *)TRAMPOLINE_START, &_trampoline_start, TrampolineLength);
POKE(volatile uint64_t, PAGE_TABLE) = CPU::x64::readcr3().raw;
POKE(volatile uint64_t, STACK) = (uint64_t)KernelAllocator.RequestPages(TO_PAGES(STACK_SIZE)) + STACK_SIZE;
POKE(volatile uint64_t, CORE) = i;
asmv("sgdt [0x580]\n"
"sidt [0x590]\n");
POKE(volatile uint64_t, START_ADDR) = (uintptr_t)&StartCPU;
((APIC::APIC *)Interrupts::apic[0])->SendInitIPI(((ACPI::MADT *)madt)->lapic[i]->APICId);
((APIC::APIC *)Interrupts::apic[0])->SendStartupIPI(((ACPI::MADT *)madt)->lapic[i]->APICId, TRAMPOLINE_START);
while (!CPUEnabled)
CPU::Pause();
trace("CPU %d loaded.", ((ACPI::MADT *)madt)->lapic[i]->APICId);
KernelAllocator.FreePages((void *)*reinterpret_cast<long *>(STACK), TO_PAGES(STACK_SIZE));
CPUEnabled = false;
}
else
KPrint("\e058C19CPU \e8888FF%d \e058C19is the BSP", ((ACPI::MADT *)madt)->lapic[i]->APICId);
}
}
}

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#ifndef __FENNIX_KERNEL_APIC_H__
#define __FENNIX_KERNEL_APIC_H__
#include <types.h>
#include <ints.hpp>
#include <cpu.hpp>
namespace APIC
{
enum APICRegisters
{
// source from: https://github.com/pdoane/osdev/blob/master/intr/local_apic.c
APIC_ID = 0x20, // Local APIC ID
APIC_VER = 0x30, // Local APIC Version
APIC_TPR = 0x80, // Task Priority
APIC_APR = 0x90, // Arbitration Priority
APIC_PPR = 0xA0, // Processor Priority
APIC_EOI = 0xB0, // EOI
APIC_RRD = 0xC0, // Remote Read
APIC_LDR = 0xD0, // Logical Destination
APIC_DFR = 0xE0, // Destination Format
APIC_SVR = 0xF0, // Spurious Interrupt Vector
APIC_ISR = 0x100, // In-Service (8 registers)
APIC_TMR = 0x180, // Trigger Mode (8 registers)
APIC_IRR = 0x200, // Interrupt Request (8 registers)
APIC_ESR = 0x280, // Error Status
APIC_ICRLO = 0x300, // Interrupt Command
APIC_ICRHI = 0x310, // Interrupt Command [63:32]
APIC_TIMER = 0x320, // LVT Timer
APIC_THERMAL = 0x330, // LVT Thermal Sensor
APIC_PERF = 0x340, // LVT Performance Counter
APIC_LINT0 = 0x350, // LVT LINT0
APIC_LINT1 = 0x360, // LVT LINT1
APIC_ERROR = 0x370, // LVT Error
APIC_TICR = 0x380, // Initial Count (for Timer)
APIC_TCCR = 0x390, // Current Count (for Timer)
APIC_TDCR = 0x3E0, // Divide Configuration (for Timer)
};
enum IOAPICRegisters
{
GetIOAPICVersion = 0x1
};
enum IOAPICFlags
{
ActiveHighLow = 2,
EdgeLevel = 8
};
enum APICDeliveryMode
{
Fixed = 0b000,
LowestPriority = 0b001, /* Reserved */
SMI = 0b010,
APIC_DELIVERY_MODE_RESERVED0 = 0b011, /* Reserved */
NMI = 0b100,
INIT = 0b101,
Startup = 0b110,
ExtINT = 0b111 /* Reserved */
};
enum APICDestinationMode
{
Physical = 0b0,
Logical = 0b1
};
enum APICDeliveryStatus
{
Idle = 0b0,
SendPending = 0b1
};
enum APICLevel
{
DeAssert = 0b0,
Assert = 0b1
};
enum APICTriggerMode
{
Edge = 0b0,
Level = 0b1
};
enum APICDestinationShorthand
{
NoShorthand = 0b00,
Self = 0b01,
AllIncludingSelf = 0b10,
AllExcludingSelf = 0b11
};
enum LVTTimerDivide
{
DivideBy2 = 0b000,
DivideBy4 = 0b001,
DivideBy8 = 0b010,
DivideBy16 = 0b011,
DivideBy32 = 0b100,
DivideBy64 = 0b101,
DivideBy128 = 0b110,
DivideBy1 = 0b111
};
enum LVTTimerMask
{
Unmasked = 0b0,
Masked = 0b1
};
enum LVTTimerMode
{
OneShot = 0b00,
Periodic = 0b01,
TSCDeadline = 0b10
};
typedef union
{
struct
{
/** @brief Interrupt Vector */
uint64_t Vector : 8;
/** @brief Reserved */
uint64_t Reserved0 : 4;
/**
* @brief Delivery Status
*
* 0: Idle
* 1: Send Pending
*/
uint64_t DeliveryStatus : 1;
/** @brief Reserved */
uint64_t Reserved1 : 3;
/**
* @brief Mask
*
* 0: Not masked
* 1: Masked
*/
uint64_t Mask : 1;
/** @brief Timer Mode
*
* 0: One-shot
* 1: Periodic
* 2: TSC-Deadline
*/
uint64_t TimerMode : 1;
/** @brief Reserved */
uint64_t Reserved2 : 14;
};
uint64_t raw;
} __attribute__((packed)) LVTTimer;
typedef union
{
struct
{
/** @brief Spurious Vector */
uint64_t Vector : 8;
/** @brief Enable or disable APIC software */
uint64_t Software : 1;
/** @brief Focus Processor Checking */
uint64_t FocusProcessorChecking : 1;
/** @brief Reserved */
uint64_t Reserved : 2;
/** @brief Disable EOI Broadcast */
uint64_t DisableEOIBroadcast : 1;
/** @brief Reserved */
uint64_t Reserved1 : 19;
};
uint64_t raw;
} __attribute__((packed)) Spurious;
typedef union
{
struct
{
/** @brief Interrupt Vector */
uint64_t Vector : 8;
/** @brief Delivery Mode */
uint64_t DeliveryMode : 3;
/** @brief Destination Mode
*
* 0: Physical
* 1: Logical
*/
uint64_t DestinationMode : 1;
/** @brief Delivery Status
*
* @note Reserved when in x2APIC mode
*/
uint64_t DeliveryStatus : 1;
/** @brief Reserved */
uint64_t Reserved0 : 1;
/** @brief Level
*
* 0: Deassert
* 1: Assert
*/
uint64_t Level : 1;
/** @brief Trigger Mode
*
* 0: Edge
* 1: Level
*/
uint64_t TriggerMode : 1;
/** @brief Reserved */
uint64_t Reserved1 : 2;
/** @brief Destination Shorthand
*
* 0: No shorthand
* 1: Self
* 2: All including self
* 3: All excluding self
*/
uint64_t DestinationShorthand : 2;
/** @brief Reserved */
uint64_t Reserved2 : 12;
};
uint64_t raw;
} __attribute__((packed)) InterruptCommandRegisterLow;
typedef union
{
struct
{
/** @brief Reserved */
uint64_t Reserved0 : 24;
/** @brief Destination */
uint64_t Destination : 8;
};
uint64_t raw;
} __attribute__((packed)) InterruptCommandRegisterHigh;
typedef union
{
struct
{
/** @brief Interrupt Vector */
uint64_t Vector : 8;
/** @brief Delivery Mode */
uint64_t DeliveryMode : 3;
/** @brief Destination Mode
*
* 0: Physical
* 1: Logical
*/
uint64_t DestinationMode : 1;
/** @brief Delivery Status */
uint64_t DeliveryStatus : 1;
/** @brief Interrupt Input Pin Polarity
*
* 0: Active High
* 1: Active Low
*/
uint64_t Polarity : 1;
/** @brief Remote IRR */
uint64_t RemoteIRR : 1;
/** @brief Trigger Mode
*
* 0: Edge
* 1: Level
*/
uint64_t TriggerMode : 1;
/** @brief Mask */
uint64_t Mask : 1;
/** @brief Reserved */
uint64_t Reserved0 : 15;
/** @brief Reserved */
uint64_t Reserved1 : 24;
/** @brief Destination */
uint64_t DestinationID : 8;
};
struct
{
uint64_t Low;
uint64_t High;
} split;
uint64_t raw;
} __attribute__((packed)) IOAPICRedirectEntry;
typedef union
{
struct
{
uint64_t Version : 8;
uint64_t Reserved : 8;
uint64_t MaximumRedirectionEntry : 8;
uint64_t Reserved2 : 8;
};
uint64_t raw;
} __attribute__((packed)) IOAPICVersion;
class APIC
{
private:
bool x2APICSupported = false;
uint64_t APICBaseAddress = 0;
public:
uint32_t Read(uint32_t Register);
void Write(uint32_t Register, uint32_t Value);
void IOWrite(uint64_t Base, uint32_t Register, uint32_t Value);
uint32_t IORead(uint64_t Base, uint32_t Register);
void EOI();
void RedirectIRQs(int CPU = 0);
void WaitForIPI();
void IPI(uint8_t CPU, InterruptCommandRegisterLow icr);
void SendInitIPI(uint8_t CPU);
void SendStartupIPI(uint8_t CPU, uint64_t StartupAddress);
uint32_t IOGetMaxRedirect(uint32_t APICID);
void RawRedirectIRQ(uint8_t Vector, uint32_t GSI, uint16_t Flags, int CPU, int Status);
void RedirectIRQ(int CPU, uint8_t IRQ, int Status);
APIC(int Core);
~APIC();
};
class Timer : public Interrupts::Handler
{
private:
APIC *lapic;
uint64_t Ticks = 0;
void OnInterruptReceived(CPU::x64::TrapFrame *Frame);
public:
uint64_t GetTicks() { return Ticks; }
void OneShot(uint32_t Vector, uint64_t Miliseconds);
Timer(APIC *apic);
~Timer();
};
}
#endif // !__FENNIX_KERNEL_APIC_H__

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#ifndef __FENNIX_KERNEL_GDT_H__
#define __FENNIX_KERNEL_GDT_H__
#include <types.h>
namespace GlobalDescriptorTable
{
/** @brief The GDT Access Table
* @details For more information, see https://wiki.osdev.org/Global_Descriptor_Table
*/
union GlobalDescriptorTableAccess
{
struct
{
/** @brief Access bit.
* @note The CPU sets this bit to 1 when the segment is accessed.
*/
uint8_t A : 1;
/** @brief Readable bit for code segments, writable bit for data segments.
* @details For code segments, this bit must be 1 for the segment to be readable.
* @details For data segments, this bit must be 1 for the segment to be writable.
*/
uint8_t RW : 1;
/** @brief Direction bit for data segments, conforming bit for code segments.
* @details For data segments, this bit must be 1 for the segment to grow up (higher addresses).
* @details For code segments, this bit must be 1 for code in the segment to be able to be executed from an equal or lower privilege level.
*/
uint8_t DC : 1;
/** @brief Executable bit.
* @details This bit must be 1 for code-segment descriptors.
* @details This bit must be 0 for data-segment and system descriptors.
*/
uint8_t E : 1;
/** @brief Descriptor type.
* @details This bit must be 0 for system descriptors.
* @details This bit must be 1 for code or data segment descriptor.
*/
uint8_t S : 1;
/** @brief Descriptor privilege level.
* @details This field determines the privilege level of the segment.
* @details 0 = kernel mode, 3 = user mode.
*/
uint8_t DPL : 2;
/** @brief Present bit.
* @details This bit must be 1 for all valid descriptors.
*/
uint8_t P : 1;
} __attribute__((packed));
uint8_t Raw;
};
union GlobalDescriptorTableFlags
{
// TODO: Add more flags.
struct
{
/** @brief Unknown. */
uint8_t Unknown : 5;
/** @brief Long mode.
* @details If the long mode bit is clear, the segment is in 32-bit protected mode.
* @details If the long mode bit is set, the segment is in 64-bit long mode.
*/
uint8_t L : 1;
} __attribute__((packed));
uint8_t Raw;
};
typedef struct _TaskStateSegmentEntry
{
/* LOW */
uint16_t Length;
uint16_t BaseLow;
uint8_t BaseMiddle;
GlobalDescriptorTableAccess Flags;
uint8_t Granularity;
uint8_t BaseHigh;
/* HIGH */
uint32_t BaseUpper;
uint32_t Reserved;
} __attribute__((packed)) TaskStateSegmentEntry;
typedef struct _TaskStateSegment
{
uint32_t Reserved0 __attribute__((aligned(16)));
uint64_t StackPointer[3];
uint64_t Reserved1;
uint64_t InterruptStackTable[7];
uint64_t Reserved2;
uint16_t Reserved3;
uint16_t IOMapBaseAddressOffset;
} __attribute__((packed)) TaskStateSegment;
typedef struct _GlobalDescriptorTableEntry
{
/** @brief Length */
uint16_t Length;
/** @brief Low Base */
uint16_t BaseLow;
/** @brief Middle Base */
uint8_t BaseMiddle;
/** @brief Access */
GlobalDescriptorTableAccess Access;
/** @brief Flags */
GlobalDescriptorTableFlags Flags;
/** @brief High Base */
uint8_t BaseHigh;
} __attribute__((packed)) GlobalDescriptorTableEntry;
typedef struct _GlobalDescriptorTableEntries
{
GlobalDescriptorTableEntry Null;
GlobalDescriptorTableEntry Code;
GlobalDescriptorTableEntry Data;
GlobalDescriptorTableEntry UserData;
GlobalDescriptorTableEntry UserCode;
TaskStateSegmentEntry TaskStateSegment;
} __attribute__((packed)) GlobalDescriptorTableEntries;
typedef struct _GlobalDescriptorTableDescriptor
{
/** @brief GDT entries length */
uint16_t Length;
/** @brief GDT entries address */
GlobalDescriptorTableEntries *Entries;
} __attribute__((packed)) GlobalDescriptorTableDescriptor;
extern void *CPUStackPointer[];
extern TaskStateSegment tss[];
void Init(int Core);
void SetKernelStack(void *Stack);
}
#define GDT_KERNEL_CODE offsetof(GlobalDescriptorTable::GlobalDescriptorTableEntries, Code)
#define GDT_KERNEL_DATA offsetof(GlobalDescriptorTable::GlobalDescriptorTableEntries, Data)
#define GDT_USER_CODE (offsetof(GlobalDescriptorTable::GlobalDescriptorTableEntries, UserCode) | 3)
#define GDT_USER_DATA (offsetof(GlobalDescriptorTable::GlobalDescriptorTableEntries, UserData) | 3)
#define GDT_TSS (offsetof(GlobalDescriptorTable::GlobalDescriptorTableEntries, TaskStateSegment) | 3)
#endif // !__FENNIX_KERNEL_GDT_H__

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#ifndef __FENNIX_KERNEL_IDT_H__
#define __FENNIX_KERNEL_IDT_H__
#include <types.h>
namespace InterruptDescriptorTable
{
typedef enum _InterruptDescriptorTableFlags
{
FlagGate_TASK = 0b101,
FlagGate_16BIT_INT = 0b110,
FlagGate_16BIT_TRAP = 0b111,
FlagGate_32BIT_INT = 0b1110,
FlagGate_32BIT_TRAP = 0b1111,
FlagGate_RING0 = 0b0,
FlagGate_RING1 = 0b1,
FlagGate_RING2 = 0b10,
FlagGate_RING3 = 0b11,
FlagGate_PRESENT = 0b1, // Not sure if this is correct.
} InterruptDescriptorTableFlags;
typedef struct _InterruptDescriptorTableEntry
{
uint64_t BaseLow : 16;
uint64_t SegmentSelector : 16;
uint64_t InterruptStackTable : 3;
uint64_t Reserved1 : 5;
InterruptDescriptorTableFlags Flags : 4;
uint64_t Reserved2 : 1;
uint64_t Ring : 2;
uint64_t Present : 1;
uint64_t BaseHigh : 48;
uint64_t Reserved3 : 32;
} __attribute__((packed)) InterruptDescriptorTableEntry;
typedef struct _InterruptDescriptorTableDescriptor
{
uint16_t Length;
InterruptDescriptorTableEntry *Entries;
} __attribute__((packed)) InterruptDescriptorTableDescriptor;
void SetEntry(uint8_t Index, void (*Base)(), InterruptDescriptorTableFlags Attribute, uint8_t InterruptStackTable, InterruptDescriptorTableFlags Ring, uint16_t SegmentSelector);
void Init(int Core);
}
#endif // !__FENNIX_KERNEL_IDT_H__