124 lines
3.2 KiB
C
124 lines
3.2 KiB
C
/**
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* PROJECT: ExectOS
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* COPYRIGHT: See COPYING.md in the top level directory
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* FILE: xtoskrnl/ke/amd64/krnlinit.c
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* DESCRIPTION: CPU architecture specific kernel initialization
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* DEVELOPERS: Rafal Kupiec <belliash@codingworkshop.eu.org>
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*/
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#include <xtos.h>
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/**
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* This routine initializes XT kernel.
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*
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* @return This routine does not return any value.
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*
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* @since XT 1.0
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*/
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XTAPI
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VOID
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KepInitializeKernel(VOID)
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{
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PKPROCESSOR_CONTROL_BLOCK Prcb;
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ULONG_PTR PageDirectory[2];
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PKPROCESS CurrentProcess;
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PKTHREAD CurrentThread;
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/* Get processor control block and current thread */
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Prcb = KeGetCurrentProcessorControlBlock();
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CurrentThread = KeGetCurrentThread();
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/* Get current process */
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CurrentProcess = CurrentThread->ApcState.Process;
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/* Initialize CPU power state structures */
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PoInitializeProcessorControlBlock(Prcb);
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/* Save processor state */
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KepSaveProcessorState(&Prcb->ProcessorState);
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/* Lower to APC runlevel */
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KeLowerRunLevel(APC_LEVEL);
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/* Initialize Idle process */
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RtlInitializeListHead(&KepProcessListHead);
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PageDirectory[0] = 0;
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PageDirectory[1] = 0;
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KeInitializeProcess(CurrentProcess, 0, 0xFFFFFFFF, PageDirectory, FALSE);
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CurrentProcess->Quantum = MAXCHAR;
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/* Initialize Idle thread */
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KeInitializeThread(CurrentProcess, CurrentThread, NULL, NULL, NULL, NULL, NULL, ArKernelBootStack, TRUE);
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CurrentThread->NextProcessor = Prcb->CpuNumber;
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CurrentThread->Priority = THREAD_HIGH_PRIORITY;
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CurrentThread->State = Running;
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CurrentThread->Affinity = (ULONG_PTR)1 << Prcb->CpuNumber;
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CurrentThread->WaitRunLevel = DISPATCH_LEVEL;
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CurrentProcess->ActiveProcessors |= (ULONG_PTR)1 << Prcb->CpuNumber;
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}
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/**
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* Performs architecture-specific initialization for the kernel executive.
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*
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* @return This routine does not return any value.
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*
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* @since XT 1.0
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*/
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XTAPI
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VOID
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KepInitializeMachine(VOID)
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{
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/* Re-enable IDE interrupts */
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HlIoPortOutByte(0x376, 0);
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HlIoPortOutByte(0x3F6, 0);
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/* Initialize frame buffer */
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HlInitializeFrameBuffer();
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/* Initialize processor */
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HlInitializeProcessor();
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}
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/**
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* This routine starts up the XT kernel. It is called after switching boot stack.
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*
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* @return This routine does not return any value.
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*
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* @since XT 1.0
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*/
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XTAPI
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VOID
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KepStartKernel(VOID)
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{
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/* Initialize XTOS kernel */
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KepInitializeKernel();
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/* Enter infinite loop */
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DebugPrint(L"KepStartKernel() finished. Entering infinite loop.\n");
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for(;;);
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}
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/**
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* Switches to a new kernel boot stack.
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*
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* @return This routine does not return any value
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*
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* @since XT 1.0
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*/
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XTAPI
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VOID
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KepSwitchBootStack(IN ULONG_PTR Stack)
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{
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/* Discard old stack frame, switch stack and jump to KepStartKernel() */
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asm volatile("mov %0, %%rdx\n"
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"xor %%rbp, %%rbp\n"
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"mov %%rdx, %%rsp\n"
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"sub %1, %%rsp\n"
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"jmp KepStartKernel\n"
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:
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: "m" (Stack),
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"i" (FLOATING_SAVE_AREA_SIZE | KEXCEPTION_FRAME_SIZE | KSWITCH_FRAME_SIZE | KRETURN_ADDRESS_SIZE),
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"p" (KepStartKernel));
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}
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