public static void main()
{
const uint MultibootMagic = 0x1BADB002;
const uint MultibootFlags = 0x10007;
const uint InitalStackSize = 0x50000;
/* Multiboot Config */
AssemblyHelper.AssemblerCode.Add(new Literal("MultibootSignature dd {0}", MultibootMagic));
AssemblyHelper.AssemblerCode.Add(new Literal("MultibootFlags dd {0}", 65543));
AssemblyHelper.AssemblerCode.Add(new Literal("MultibootChecksum dd {0}", -(MultibootMagic + MultibootFlags)));
AssemblyHelper.AssemblerCode.Add(new Literal("MultibootHeaderAddr dd {0}", 0));
AssemblyHelper.AssemblerCode.Add(new Literal("MultibootLoadAddr dd {0}", 0));
AssemblyHelper.AssemblerCode.Add(new Literal("MultibootLoadEndAddr dd {0}", 0));
AssemblyHelper.AssemblerCode.Add(new Literal("MultibootBSSEndAddr dd {0}", 0));
AssemblyHelper.AssemblerCode.Add(new Literal("MultibootEntryAddr dd {0}", 0));
AssemblyHelper.InsertData(new AsmData("InitialStack", InitalStackSize));
AssemblyHelper.AssemblerCode.Add(new Label("_Kernel_Main"));
/* Here is Entrypoint Method */
AssemblyHelper.AssemblerCode.Add(new Cli()); //Clear interrupts first !!
//Setup Stack pointer, We do rest things later (i.e. Another method) because they are managed :)
AssemblyHelper.AssemblerCode.Add(new Mov {
DestinationReg = Registers.ESP, SourceRef = "InitialStack"
});
AssemblyHelper.AssemblerCode.Add(new Add {
DestinationReg = Registers.ESP, SourceRef = InitalStackSize.ToString()
});
AssemblyHelper.AssemblerCode.Add(new Push {
DestinationReg = Registers.EAX
});
AssemblyHelper.AssemblerCode.Add(new Push {
DestinationReg = Registers.EBX
}); //Push Multiboot Header Info Address
AssemblyHelper.AssemblerCode.Add(new Call("Kernel_Start"));
}
public static void main()
{
const uint MultibootMagic = 0x1BADB002;
const uint MultibootFlags = 0x10007;
const uint InitalStackSize = 0x50000;
const uint InitalHeapSize = 0x100000;
/* Multiboot Config */
new Literal("MultibootSignature dd {0}", MultibootMagic);
new Literal("MultibootFlags dd {0}", MultibootFlags);
new Literal("MultibootChecksum dd {0}", -(MultibootMagic + MultibootFlags));
new Literal("MultibootHeaderAddr dd {0}", 0);
new Literal("MultibootLoadAddr dd {0}", 0);
new Literal("MultibootLoadEndAddr dd {0}", 0);
new Literal("MultibootBSSEndAddr dd {0}", 0);
new Literal("MultibootEntryAddr dd {0}", 0);
new Literal("MultibootVesaMode dd {0}", 0);
new Literal("MultibootVesaWidth dd {0}", 1024);
new Literal("MultibootVesaHeight dd {0}", 768);
new Literal("MultibootVesaDepth dd {0}", 32);
Helper.InsertData("InitialStack", InitalStackSize);
Helper.InsertData("InitialHeap", InitalHeapSize);
new Label("_Kernel_Main");
#region KernelPageDirectory
Helper.InsertData(new AsmData("align 0x1000"));
Helper.InsertData(new AsmData("KernelPageDirectory:"));
Helper.InsertData(new AsmData("dd (KernelPageTable - 0xC0000000 + 0x3)"));
Helper.InsertData(new AsmData("times (0x300 - 1) dd 0"));
Helper.InsertData(new AsmData("dd (KernelPageTable - 0xC0000000 + 0x3)"));
Helper.InsertData(new AsmData("times (1024 - 0x300 - 1) dd 0"));
var xPageTable = new uint[1024];
for (int i = 0; i < 1024; i++)
{
xPageTable[i] = (uint)((i * 0x1000) | 0x3);
}
Helper.InsertData(new AsmData("KernelPageTable", xPageTable));
#endregion
/* Load Page Directory Base Register. */
new Mov {
DestinationReg = Register.ECX, SourceRef = "(KernelPageDirectory - 0xC0000000)"
};
new Mov {
DestinationReg = Register.CR3, SourceReg = Register.ECX
};
/* Set PG bit in CR0 to enable paging. */
new Mov {
DestinationReg = Register.ECX, SourceReg = Register.CR0
};
new Or {
DestinationReg = Register.ECX, SourceRef = "0x80000000"
};
new Mov {
DestinationReg = Register.CR0, SourceReg = Register.ECX
};
/* Prepare for our quantum jump to Higher address */
new Lea {
DestinationReg = Register.ECX, SourceRef = "Higher_Half_Kernel", SourceIndirect = true
};
new Jmp {
DestinationRef = "ECX"
};
new Label("Higher_Half_Kernel");
new Mov {
DestinationRef = "KernelPageDirectory", DestinationIndirect = true, SourceRef = "0x0"
};
new Literal("invlpg [0]");
/* Setup Kernel stack */
new Mov {
DestinationReg = Register.ESP, SourceRef = "InitialStack"
};
new Add {
DestinationReg = Register.ESP, SourceRef = InitalStackSize.ToString()
};
/* Push relevent data to the stack */
new Push {
DestinationReg = Register.EAX
}; //Push Magic Number
new Push {
DestinationReg = Register.EBX
}; //Push Multiboot Address
new Push {
DestinationRef = "KernelPageDirectory"
};
new Push {
DestinationRef = "InitialHeap"
};
/* Enable Floating Point Unit */
new Mov {
DestinationReg = Register.EAX, SourceReg = Register.CR0
};
new And {
DestinationReg = Register.AX, SourceRef = "0xFFFD", Size = 16
};
new Or {
DestinationReg = Register.AX, SourceRef = "0x10", Size = 16
};
new Mov {
DestinationReg = Register.CR0, SourceReg = Register.EAX
};
new Literal("fninit");
/* Enable SSE */
new Mov {
DestinationReg = Register.EAX, SourceReg = Register.CR0
};
new And {
DestinationReg = Register.AX, SourceRef = "0xFFFB", Size = 16
};
new Or {
DestinationReg = Register.AX, SourceRef = "0x2", Size = 16
};
new Mov {
DestinationReg = Register.CR0, SourceReg = Register.EAX
};
new Mov {
DestinationReg = Register.EAX, SourceReg = Register.CR4
};
new Or {
DestinationReg = Register.AX, SourceRef = "0x600", Size = 16
};
new Mov {
DestinationReg = Register.CR4, SourceReg = Register.EAX
};
/* Call Kernel Start */
new Cli();
new Call {
DestinationRef = "Kernel_Start", IsLabel = true
};
}