krnlinit.c File Reference

#include <ntoskrnl.h>
#include <debug.h>

Include dependency graph for krnlinit.c:

Go to the source code of this file.

Macros
#define	NDEBUG

Functions
VOID NTAPI	KiInitializeKernel (IN PKPROCESS InitProcess, IN PKTHREAD InitThread, IN PVOID IdleStack, IN PKPRCB Prcb, IN PLOADER_PARAMETER_BLOCK LoaderBlock)
VOID	KiCalculateCpuFrequency (IN PKPRCB Prcb)
VOID NTAPI	KiInitializeHandBuiltThread (IN PKTHREAD Thread, IN PKPROCESS Process, IN PVOID Stack)
DECLSPEC_NORETURN VOID NTAPI	KiSystemStartupBootStack (VOID)

Variables
ULONG_PTR	MainSSDT []
UCHAR	MainSSPT []
BOOLEAN	RtlpUse16ByteSLists

Macro Definition Documentation

NDEBUG

#define NDEBUG

Definition at line 13 of file krnlinit.c.

Function Documentation

KiCalculateCpuFrequency()

VOID KiCalculateCpuFrequency

(

IN PKPRCB

Prcb

)

Definition at line 35 of file krnlinit.c.

{
    if (Prcb->FeatureBits & KF_RDTSC)
    {
        ULONG Sample = 0;
        CPU_INFO CpuInfo;
        KI_SAMPLE_MAP Samples[10];
        PKI_SAMPLE_MAP CurrentSample = Samples;
 
        /* Start sampling loop */
        for (;;)
        {
            /* Do a dummy CPUID to start the sample */
            KiCpuId(&CpuInfo, 0);
 
            /* Fill out the starting data */
            CurrentSample->PerfStart = KeQueryPerformanceCounter(NULL);
            CurrentSample->TSCStart = __rdtsc();
            CurrentSample->PerfFreq.QuadPart = -50000;
 
            /* Sleep for this sample */
            KeStallExecutionProcessor(CurrentSample->PerfFreq.QuadPart * -1 / 10);
 
            /* Do another dummy CPUID */
            KiCpuId(&CpuInfo, 0);
 
            /* Fill out the ending data */
            CurrentSample->PerfEnd =
                KeQueryPerformanceCounter(&CurrentSample->PerfFreq);
            CurrentSample->TSCEnd = __rdtsc();
 
            /* Calculate the differences */
            CurrentSample->PerfDelta = CurrentSample->PerfEnd.QuadPart -
                                       CurrentSample->PerfStart.QuadPart;
            CurrentSample->TSCDelta = CurrentSample->TSCEnd -
                                      CurrentSample->TSCStart;
 
            /* Compute CPU Speed */
            CurrentSample->MHz = (ULONG)((CurrentSample->TSCDelta *
                                          CurrentSample->
                                          PerfFreq.QuadPart + 500000) /
                                         (CurrentSample->PerfDelta *
                                          1000000));
 
            /* Check if this isn't the first sample */
            if (Sample)
            {
                /* Check if we got a good precision within 1MHz */
                if ((CurrentSample->MHz == CurrentSample[-1].MHz) ||
                    (CurrentSample->MHz == CurrentSample[-1].MHz + 1) ||
                    (CurrentSample->MHz == CurrentSample[-1].MHz - 1))
                {
                    /* We did, stop sampling */
                    break;
                }
            }
 
            /* Move on */
            CurrentSample++;
            Sample++;
 
            if (Sample == RTL_NUMBER_OF(Samples))
            {
                /* No luck. Average the samples and be done */
                ULONG TotalMHz = 0;
                while (Sample--)
                {
                    TotalMHz += Samples[Sample].MHz;
                }
                CurrentSample[-1].MHz = TotalMHz / RTL_NUMBER_OF(Samples);
                DPRINT1("Sampling CPU frequency failed. Using average of %lu MHz\n", CurrentSample[-1].MHz);
                break;
            }
        }
 
        /* Save the CPU Speed */
        Prcb->MHz = CurrentSample[-1].MHz;
    }
}

Referenced by KiSystemStartupBootStack().

KiInitializeHandBuiltThread()

VOID NTAPI KiInitializeHandBuiltThread	(	IN PKTHREAD	Thread,
		IN PKPROCESS	Process,
		IN PVOID	Stack
	)

Definition at line 118 of file krnlinit.c.

{
    PKPRCB Prcb = KeGetCurrentPrcb();
 
    /* Setup the Thread */
    KeInitializeThread(Process, Thread, NULL, NULL, NULL, NULL, NULL, Stack);
 
    Thread->NextProcessor = Prcb->Number;
    Thread->IdealProcessor = Prcb->Number;
    Thread->Priority = HIGH_PRIORITY;
    Thread->State = Running;
    Thread->Affinity = (ULONG_PTR)1 << Prcb->Number;
    Thread->WaitIrql = DISPATCH_LEVEL;
    Process->ActiveProcessors |= (ULONG_PTR)1 << Prcb->Number;
 
}

Referenced by KiInitializeKernel(), and KiSystemStartupBootStack().

KiInitializeKernel()

VOID NTAPI KiInitializeKernel	(	IN PKPROCESS	InitProcess,
		IN PKTHREAD	InitThread,
		IN PVOID	IdleStack,
		IN PKPRCB	Prcb,
		IN PLOADER_PARAMETER_BLOCK	LoaderBlock
	)

Definition at line 225 of file krnlinit.c.

{
    ULONG_PTR PageDirectory[2];
    PVOID DpcStack;
    ULONG i;
 
    /* Set boot-level flags */
    KeFeatureBits = Prcb->FeatureBits;
 
    /* Initialize 8/16 bit SList support */
    RtlpUse16ByteSLists = (KeFeatureBits & KF_CMPXCHG16B) ? TRUE : FALSE;
 
    /* Set the current MP Master KPRCB to the Boot PRCB */
    Prcb->MultiThreadSetMaster = Prcb;
 
    /* Initialize Bugcheck Callback data */
    InitializeListHead(&KeBugcheckCallbackListHead);
    InitializeListHead(&KeBugcheckReasonCallbackListHead);
    KeInitializeSpinLock(&BugCheckCallbackLock);
 
    /* Initialize the Timer Expiration DPC */
    KeInitializeDpc(&KiTimerExpireDpc, KiTimerExpiration, NULL);
    KeSetTargetProcessorDpc(&KiTimerExpireDpc, 0);
 
    /* Initialize Profiling data */
    KeInitializeSpinLock(&KiProfileLock);
    InitializeListHead(&KiProfileListHead);
    InitializeListHead(&KiProfileSourceListHead);
 
    /* Loop the timer table */
    for (i = 0; i < TIMER_TABLE_SIZE; i++)
    {
        /* Initialize the list and entries */
        InitializeListHead(&KiTimerTableListHead[i].Entry);
        KiTimerTableListHead[i].Time.HighPart = 0xFFFFFFFF;
        KiTimerTableListHead[i].Time.LowPart = 0;
    }
 
    /* Initialize the Swap event and all swap lists */
    KeInitializeEvent(&KiSwapEvent, SynchronizationEvent, FALSE);
    InitializeListHead(&KiProcessInSwapListHead);
    InitializeListHead(&KiProcessOutSwapListHead);
    InitializeListHead(&KiStackInSwapListHead);
 
    /* Initialize the mutex for generic DPC calls */
    ExInitializeFastMutex(&KiGenericCallDpcMutex);
 
    /* Initialize the syscall table */
    KeServiceDescriptorTable[0].Base = MainSSDT;
    KeServiceDescriptorTable[0].Count = NULL;
    KeServiceDescriptorTable[0].Limit = KiServiceLimit;
    KeServiceDescriptorTable[1].Limit = 0;
    KeServiceDescriptorTable[0].Number = MainSSPT;
 
    /* Copy the the current table into the shadow table for win32k */
    RtlCopyMemory(KeServiceDescriptorTableShadow,
                  KeServiceDescriptorTable,
                  sizeof(KeServiceDescriptorTable));
 
    /* Initialize the Idle Process and the Process Listhead */
    InitializeListHead(&KiProcessListHead);
    PageDirectory[0] = 0;
    PageDirectory[1] = 0;
    KeInitializeProcess(InitProcess,
                        0,
                        MAXULONG_PTR,
                        PageDirectory,
                        FALSE);
    InitProcess->QuantumReset = MAXCHAR;
 
    /* Initialize the startup thread */
    KiInitializeHandBuiltThread(InitThread, InitProcess, IdleStack);
 
    /* Initialize the Kernel Executive */
    ExpInitializeExecutive(0, LoaderBlock);
 
    /* Calculate the time reciprocal */
    KiTimeIncrementReciprocal =
        KiComputeReciprocal(KeMaximumIncrement,
                            &KiTimeIncrementShiftCount);
 
    /* Update DPC Values in case they got updated by the executive */
    Prcb->MaximumDpcQueueDepth = KiMaximumDpcQueueDepth;
    Prcb->MinimumDpcRate = KiMinimumDpcRate;
    Prcb->AdjustDpcThreshold = KiAdjustDpcThreshold;
 
    /* Allocate the DPC Stack */
    DpcStack = MmCreateKernelStack(FALSE, 0);
    if (!DpcStack) KeBugCheckEx(NO_PAGES_AVAILABLE, 1, 0, 0, 0);
    Prcb->DpcStack = DpcStack;
}

Referenced by KiSystemStartupBootStack().

KiSystemStartupBootStack()

DECLSPEC_NORETURN VOID NTAPI KiSystemStartupBootStack

(

VOID

)

Definition at line 142 of file krnlinit.c.

{
    PLOADER_PARAMETER_BLOCK LoaderBlock = KeLoaderBlock; // hack
    PKPRCB Prcb = KeGetCurrentPrcb();
    PKTHREAD Thread = (PKTHREAD)KeLoaderBlock->Thread;
    PKPROCESS Process = Thread->ApcState.Process;
    PVOID KernelStack = (PVOID)KeLoaderBlock->KernelStack;
 
    /* Set Node Data */
    Prcb->ParentNode = KeNodeBlock[0];
    Prcb->ParentNode->ProcessorMask |= Prcb->SetMember;
 
    /* Initialize the Power Management Support for this PRCB */
    PoInitializePrcb(Prcb);
 
    /* Save CPU state */
    KiSaveProcessorControlState(&Prcb->ProcessorState);
 
    /* Get cache line information for this CPU */
    KiGetCacheInformation();
 
    /* Initialize spinlocks and DPC data */
    KiInitSpinLocks(Prcb, Prcb->Number);
 
    /* Set up the thread-related fields in the PRCB */
    Prcb->CurrentThread = Thread;
    Prcb->NextThread = NULL;
    Prcb->IdleThread = Thread;
 
    /* Initialize PRCB pool lookaside pointers */
    ExInitPoolLookasidePointers();
 
    /* Lower to APC_LEVEL */
    KeLowerIrql(APC_LEVEL);
 
    /* Check if this is the boot cpu */
    if (Prcb->Number == 0)
    {
        /* Initialize the kernel */
        KiInitializeKernel(Process, Thread, KernelStack, Prcb, LoaderBlock);
    }
    else
    {
        /* Initialize the startup thread */
        KiInitializeHandBuiltThread(Thread, Process, KernelStack);
    }
 
    /* Calculate the CPU frequency */
    KiCalculateCpuFrequency(Prcb);
 
    /* Raise to Dispatch */
    KfRaiseIrql(DISPATCH_LEVEL);
 
    /* Set the Idle Priority to 0. This will jump into Phase 1 */
    KeSetPriorityThread(Thread, 0);
 
    /* If there's no thread scheduled, put this CPU in the Idle summary */
    KiAcquirePrcbLock(Prcb);
    if (!Prcb->NextThread) KiIdleSummary |= (ULONG_PTR)1 << Prcb->Number;
    KiReleasePrcbLock(Prcb);
 
    /* Raise back to HIGH_LEVEL and clear the PRCB for the loader block */
    KfRaiseIrql(HIGH_LEVEL);
    LoaderBlock->Prcb = 0;
 
    /* Set the priority of this thread to 0 */
    Thread = KeGetCurrentThread();
    Thread->Priority = 0;
 
    /* Force interrupts enabled and lower IRQL back to DISPATCH_LEVEL */
    _enable();
    KeLowerIrql(DISPATCH_LEVEL);
 
    /* Set the right wait IRQL */
    Thread->WaitIrql = DISPATCH_LEVEL;
 
    /* Jump into the idle loop */
    KiIdleLoop();
}

Referenced by KiSwitchToBootStack().

Variable Documentation

MainSSDT

ULONG_PTR MainSSDT[]

extern

Definition at line 9 of file napi.h.

Referenced by KiInitializeKernel(), and KiInitSystem().

MainSSPT

UCHAR MainSSPT[]

extern

Definition at line 15 of file napi.h.

Referenced by KiInitializeKernel(), and KiInitSystem().

RtlpUse16ByteSLists

BOOLEAN RtlpUse16ByteSLists

extern

Referenced by KiInitializeKernel().