int main(void)
{
Init_LED();
InitPIT();
/* Enable interrupt */
NVIC_EnableIRQ(PIT_IRQn);
while(1){
}
return 0;
}
// ----------------------------------------------------------------------------
void Entry()
{
// Move cursor off-screen
_outpw(0x3D4, 0x070E);
_outpw(0x3D4, 0xD00F);
CKernelHeader* KH = (CKernelHeader*)CMemMap::c_KernelImageBase;
dword* BootInfo = (dword*)(*(dword*)(CMemMap::c_KernelImageBase + 0x100));
RawOutString("Checking Kernel...", 0, 0, 0xA);
if (IsKernelOK(*KH, BootInfo))
{
RawOutString("OK", 18, 0, 0xA);
}
else
{
RawOutString("Fail", 18, 0, 0xC);
ErrIf(true);
}
dword BootType = BootInfo[1];
dword DriversCount = BootInfo[2] - 1;
CDriverInfo DriverInfos[12];
for (dword i = 0; i < DriversCount; i++)
{
DriverInfos[i].m_BytesSize = BootInfo[3 + (i + 1) * 3];
DriverInfos[i].m_LoadPage = BootInfo[4 + (i + 1) * 3];
char* Name = PC(BootInfo[5 + (i + 1) * 3]);
for (int j = 0;; j++)
{
DriverInfos[i].m_Name[j] = Name[j];
if (Name[j] == 0)
break;
}
}
InitPIT();
CPhysMemManager PMM;
PMM.AllocBlockAt(KH->GetKernelCodeBase(), KH->m_KernelCodePageCount, false);
PMM.AllocBlockAt(KH->GetKernelRDataBase(), KH->m_KernelRDataPageCount, false);
PMM.AllocBlockAt(KH->GetKernelDataBase(), KH->m_KernelDataPageCount, true);
PMM.AllocBlockAt((byte*)CMemMap::c_VideoRamTextBase, 8, true);
__writecr3(CMemMap::c_PmmPageDirectory);
SetupCR0();
for (dword i = 0; i < DriversCount; i++)
{
PMM.AllocBlockAt(
DriverInfos[i].GetImageBase(),
DriverInfos[i].GetImagePageCount(), false);
}
CGDT GDT(PMM);
GDT.CreateNewDescriptor(0, 0xFFFFF, 0x92, 1);
GDT.CreateNewDescriptor(0, 0xFFFFF, 0x98, 1);
GDT.CreateNewDescriptor(0, 0xFFFFF, 0xF2, 1);
GDT.CreateNewDescriptor(0, 0xFFFFF, 0xF8, 1);
static const dword HeapPageCount = 32;
void* HeapBlock = PMM.AllocBlock(HeapPageCount);
CHeap SysHeap(PB(HeapBlock), HeapPageCount * 4096);
g_SysHeap = &SysHeap;
CTask KernelTask(GDT, true, 0, 0, 0, 0, CMemMap::c_PmmPageDirectory);
KernelTask._setActive();
CIntManager IM(PMM, KernelTask.GetTSS().GetSelector());
CKernel K(KernelTask, PMM, IM, GDT, IM.GetIDT(),
BootType, DriverInfos, DriversCount);
}
void timer_install()
{
InitPIT();
}