usage.c File Reference

#include <hal.h>

Include dependency graph for usage.c:

Go to the source code of this file.

Functions
VOID NTAPI	HalpGetResourceSortValue (IN PCM_PARTIAL_RESOURCE_DESCRIPTOR Descriptor, OUT PULONG Scale, OUT PLARGE_INTEGER Value)
VOID NTAPI	HalpBuildPartialFromIdt (IN ULONG Entry, IN PCM_PARTIAL_RESOURCE_DESCRIPTOR RawDescriptor, IN PCM_PARTIAL_RESOURCE_DESCRIPTOR TranslatedDescriptor)
VOID NTAPI	HalpBuildPartialFromAddress (IN INTERFACE_TYPE Interface, IN PADDRESS_USAGE CurrentAddress, IN ULONG Element, IN PCM_PARTIAL_RESOURCE_DESCRIPTOR RawDescriptor, IN PCM_PARTIAL_RESOURCE_DESCRIPTOR TranslatedDescriptor)
VOID NTAPI	HalpReportResourceUsage (IN PUNICODE_STRING HalName, IN INTERFACE_TYPE InterfaceType)
VOID NTAPI	HalpRegisterVector (IN UCHAR Flags, IN ULONG BusVector, IN ULONG SystemVector, IN KIRQL Irql)
VOID NTAPI	HalpEnableInterruptHandler (IN UCHAR Flags, IN ULONG BusVector, IN ULONG SystemVector, IN KIRQL Irql, IN PVOID Handler, IN KINTERRUPT_MODE Mode)
VOID NTAPI	HalpGetNMICrashFlag (VOID)

Variables
BOOLEAN	HalpGetInfoFromACPI
BOOLEAN	HalpNMIDumpFlag
PUCHAR	KdComPortInUse
PADDRESS_USAGE	HalpAddressUsageList
IDTUsageFlags	HalpIDTUsageFlags [MAXIMUM_IDTVECTOR+1]
IDTUsage	HalpIDTUsage [MAXIMUM_IDTVECTOR+1]
USHORT	HalpComPortIrqMapping [][2]
ADDRESS_USAGE	HalpComIoSpace
ADDRESS_USAGE	HalpDefaultIoSpace

Function Documentation

HalpBuildPartialFromAddress()

VOID NTAPI HalpBuildPartialFromAddress	(	IN INTERFACE_TYPE	Interface,
		IN PADDRESS_USAGE	CurrentAddress,
		IN ULONG	Element,
		IN PCM_PARTIAL_RESOURCE_DESCRIPTOR	RawDescriptor,
		IN PCM_PARTIAL_RESOURCE_DESCRIPTOR	TranslatedDescriptor
	)

Definition at line 209 of file usage.c.

{
    ULONG AddressSpace;
 
    /* Set the type and make it exclusive */
    RawDescriptor->Type = CurrentAddress->Type;
    RawDescriptor->ShareDisposition = CmResourceShareDriverExclusive;
 
    /* Check what this is */
    if (RawDescriptor->Type == CmResourceTypePort)
    {
        /* Write out port data */
        AddressSpace = 1;
        RawDescriptor->Flags = CM_RESOURCE_PORT_IO;
        RawDescriptor->u.Port.Start.HighPart = 0;
        RawDescriptor->u.Port.Start.LowPart = CurrentAddress->Element[Element].Start;
        RawDescriptor->u.Port.Length = CurrentAddress->Element[Element].Length;
 
        /* Determine if 16-bit port addresses are allowed */
        RawDescriptor->Flags |= HalpIs16BitPortDecodeSupported();
    }
    else
    {
        /* Write out memory data */
        AddressSpace = 0;
        RawDescriptor->Flags = (CurrentAddress->Flags & IDT_READ_ONLY) ?
                                CM_RESOURCE_MEMORY_READ_ONLY :
                                CM_RESOURCE_MEMORY_READ_WRITE;
        RawDescriptor->u.Memory.Start.HighPart = 0;
        RawDescriptor->u.Memory.Start.LowPart = CurrentAddress->Element[Element].Start;
        RawDescriptor->u.Memory.Length = CurrentAddress->Element[Element].Length;
    }
 
    /* Make an identical copy to begin with */
    RtlCopyMemory(TranslatedDescriptor, RawDescriptor, sizeof(CM_PARTIAL_RESOURCE_DESCRIPTOR));
 
    /* Check what this is */
    if (RawDescriptor->Type == CmResourceTypePort)
    {
        /* Translate the port */
        HalTranslateBusAddress(Interface,
                               0,
                               RawDescriptor->u.Port.Start,
                               &AddressSpace,
                               &TranslatedDescriptor->u.Port.Start);
 
        /* If it turns out this is memory once translated, flag it */
        if (AddressSpace == 0) TranslatedDescriptor->Flags = CM_RESOURCE_PORT_MEMORY;
 
    }
    else
    {
        /* Translate the memory */
        HalTranslateBusAddress(Interface,
                               0,
                               RawDescriptor->u.Memory.Start,
                               &AddressSpace,
                               &TranslatedDescriptor->u.Memory.Start);
    }
}

Referenced by HalpReportResourceUsage().

HalpBuildPartialFromIdt()

VOID NTAPI HalpBuildPartialFromIdt	(	IN ULONG	Entry,
		IN PCM_PARTIAL_RESOURCE_DESCRIPTOR	RawDescriptor,
		IN PCM_PARTIAL_RESOURCE_DESCRIPTOR	TranslatedDescriptor
	)

Definition at line 171 of file usage.c.

{
    /* Exclusive interrupt entry */
    RawDescriptor->Type = CmResourceTypeInterrupt;
    RawDescriptor->ShareDisposition = CmResourceShareDriverExclusive;
 
    /* Check the interrupt type */
    if (HalpIDTUsageFlags[Entry].Flags & IDT_LATCHED)
    {
        /* Latched */
        RawDescriptor->Flags = CM_RESOURCE_INTERRUPT_LATCHED;
    }
    else
    {
        /* Level */
        RawDescriptor->Flags = CM_RESOURCE_INTERRUPT_LEVEL_SENSITIVE;
    }
 
    /* Get vector and level from IDT usage */
    RawDescriptor->u.Interrupt.Vector = HalpIDTUsage[Entry].BusReleativeVector;
    RawDescriptor->u.Interrupt.Level = HalpIDTUsage[Entry].BusReleativeVector;
 
    /* Affinity is all the CPUs */
    RawDescriptor->u.Interrupt.Affinity = HalpActiveProcessors;
 
    /* The translated copy is identical */
    RtlCopyMemory(TranslatedDescriptor, RawDescriptor, sizeof(CM_PARTIAL_RESOURCE_DESCRIPTOR));
 
    /* But the vector and IRQL must be set correctly */
    TranslatedDescriptor->u.Interrupt.Vector = Entry;
    TranslatedDescriptor->u.Interrupt.Level = HalpIDTUsage[Entry].Irql;
}

Referenced by HalpReportResourceUsage().

HalpEnableInterruptHandler()

VOID NTAPI HalpEnableInterruptHandler	(	IN UCHAR	Flags,
		IN ULONG	BusVector,
		IN ULONG	SystemVector,
		IN KIRQL	Irql,
		IN PVOID	Handler,
		IN KINTERRUPT_MODE	Mode
	)

Definition at line 582 of file usage.c.

{
    /* Set the IDT_LATCHED flag for latched interrupts */
    if (Mode == Latched) Flags |= IDT_LATCHED;
 
    /* Register the vector */
    HalpRegisterVector(Flags, BusVector, SystemVector, Irql);
 
    /* Connect the interrupt */
    KeRegisterInterruptHandler(SystemVector, Handler);
 
    /* Enable the interrupt */
    HalEnableSystemInterrupt(SystemVector, Irql, Mode);
}

HalpGetNMICrashFlag()

VOID NTAPI HalpGetNMICrashFlag

(

VOID

)

Definition at line 605 of file usage.c.

{
    UNICODE_STRING ValueName;
    UNICODE_STRING KeyName = RTL_CONSTANT_STRING(L"\\Registry\\Machine\\System\\CurrentControlSet\\Control\\CrashControl");
    OBJECT_ATTRIBUTES ObjectAttributes;
    ULONG ResultLength;
    HANDLE Handle;
    NTSTATUS Status;
    KEY_VALUE_PARTIAL_INFORMATION KeyValueInformation;
 
    /* Set default */
    HalpNMIDumpFlag = 0;
 
    /* Initialize attributes */
    InitializeObjectAttributes(&ObjectAttributes,
                               &KeyName,
                               OBJ_CASE_INSENSITIVE,
                               NULL,
                               NULL);
 
    /* Open crash key */
    Status = ZwOpenKey(&Handle, KEY_READ, &ObjectAttributes);
    if (NT_SUCCESS(Status))
    {
        /* Query key value */
        RtlInitUnicodeString(&ValueName, L"NMICrashDump");
        Status = ZwQueryValueKey(Handle,
                                 &ValueName,
                                 KeyValuePartialInformation,
                                 &KeyValueInformation,
                                 sizeof(KeyValueInformation),
                                 &ResultLength);
        if (NT_SUCCESS(Status))
        {
            /* Check for valid data */
            if (ResultLength == sizeof(KEY_VALUE_PARTIAL_INFORMATION))
            {
                /* Read the flag */
                HalpNMIDumpFlag = KeyValueInformation.Data[0];
            }
        }
 
        /* We're done */
        ZwClose(Handle);
    }
}

Referenced by HalpInitializePciBus().

HalpGetResourceSortValue()

VOID NTAPI HalpGetResourceSortValue	(	IN PCM_PARTIAL_RESOURCE_DESCRIPTOR	Descriptor,
		OUT PULONG	Scale,
		OUT PLARGE_INTEGER	Value
	)

Definition at line 131 of file usage.c.

{
    /* Sorting depends on resource type */
    switch (Descriptor->Type)
    {
        case CmResourceTypeInterrupt:
 
            /* Interrupt goes by level */
            *Scale = 0;
            Value->QuadPart = (LONGLONG)Descriptor->u.Interrupt.Level;
            break;
 
        case CmResourceTypePort:
 
            /* Port goes by port address */
            *Scale = 1;
            *Value = Descriptor->u.Port.Start;
            break;
 
        case CmResourceTypeMemory:
 
            /* Memory goes by base address */
            *Scale = 2;
            *Value = Descriptor->u.Memory.Start;
            break;
 
        default:
 
            /* Anything else */
            *Scale = 4;
            Value->QuadPart = 0LL;
            break;
    }
}

Referenced by HalpReportResourceUsage().

HalpRegisterVector()

VOID NTAPI HalpRegisterVector	(	IN UCHAR	Flags,
		IN ULONG	BusVector,
		IN ULONG	SystemVector,
		IN KIRQL	Irql
	)

Definition at line 565 of file usage.c.

{
    /* Save the vector flags */
    HalpIDTUsageFlags[SystemVector].Flags = Flags;
 
    /* Save the vector data */
    HalpIDTUsage[SystemVector].Irql  = Irql;
    HalpIDTUsage[SystemVector].BusReleativeVector = (UCHAR)BusVector;
}

HalpReportResourceUsage()

VOID NTAPI HalpReportResourceUsage	(	IN PUNICODE_STRING	HalName,
		IN INTERFACE_TYPE	InterfaceType
	)

Definition at line 277 of file usage.c.

{
    PCM_RESOURCE_LIST RawList, TranslatedList;
    PCM_FULL_RESOURCE_DESCRIPTOR RawFull, TranslatedFull;
    PCM_PARTIAL_RESOURCE_DESCRIPTOR CurrentRaw, CurrentTranslated, SortedRaw, SortedTranslated;
    CM_PARTIAL_RESOURCE_DESCRIPTOR RawPartial, TranslatedPartial;
    PCM_PARTIAL_RESOURCE_LIST RawPartialList = NULL, TranslatedPartialList = NULL;
    INTERFACE_TYPE Interface;
    ULONG i, j, k, ListSize, Count, Element, CurrentScale, SortScale, ReportType, FlagMatch;
    ADDRESS_USAGE *CurrentAddress;
    LARGE_INTEGER CurrentSortValue, SortValue;
 
    DbgPrint("%wZ detected\n", HalName);
 
    /* Check if KD is using a COM port */
    if (KdComPortInUse)
    {
        /* Enter it into the I/O space */
        HalpComIoSpace.Element[0].Start = PtrToUlong(KdComPortInUse);
        HalpComIoSpace.Next = HalpAddressUsageList;
        HalpAddressUsageList = &HalpComIoSpace;
 
#if defined(SARCH_XBOX)
        /*
         * Do not claim interrupt resources for the KD COM port.
         * The actual COM port lacks SERIRQ, IRQ 4 is hardwired to the NIC.
         */
#else
        /* Use the debug port table if we have one */
        HalpGetInfoFromACPI = HalpGetDebugPortTable();
 
        /* Check if we're using ACPI */
        if (!HalpGetInfoFromACPI)
        {
            /* No, so use our local table */
            ULONG_PTR Port;
            for (i = 0, Port = HalpComPortIrqMapping[i][0];
                 Port;
                 i++, Port = HalpComPortIrqMapping[i][0])
            {
                /* Is this the port we want? */
                if (Port == (ULONG_PTR)KdComPortInUse)
                {
                    /* Register it */
                    HalpRegisterVector(IDT_DEVICE | IDT_LATCHED,
                                       HalpComPortIrqMapping[i][1],
                                       HalpComPortIrqMapping[i][1] +
                                       PRIMARY_VECTOR_BASE,
                                       HIGH_LEVEL);
                }
            }
        }
#endif
    }
 
    /* On non-ACPI systems, we need to build an address map */
    HalpBuildAddressMap();
 
    /* Allocate the master raw and translated lists */
    RawList = ExAllocatePoolWithTag(NonPagedPool, PAGE_SIZE * 2, TAG_HAL);
    TranslatedList = ExAllocatePoolWithTag(NonPagedPool, PAGE_SIZE * 2, TAG_HAL);
    if (!(RawList) || !(TranslatedList))
    {
        /* Bugcheck the system */
        KeBugCheckEx(HAL_MEMORY_ALLOCATION,
                     4 * PAGE_SIZE,
                     1,
                     (ULONG_PTR)__FILE__,
                     __LINE__);
    }
 
    /* Zero out the lists */
    RtlZeroMemory(RawList, PAGE_SIZE * 2);
    RtlZeroMemory(TranslatedList, PAGE_SIZE * 2);
 
    /* Set the interface type to begin with */
    RawList->List[0].InterfaceType = InterfaceTypeUndefined;
 
    /* Loop all IDT entries that are not IRQs */
    for (i = 0; i < PRIMARY_VECTOR_BASE; i++)
    {
        /* Check if the IDT isn't owned */
        if (!(HalpIDTUsageFlags[i].Flags & IDT_REGISTERED))
        {
            /* Then register it for internal usage */
            HalpIDTUsageFlags[i].Flags = IDT_INTERNAL;
            HalpIDTUsage[i].BusReleativeVector = (UCHAR)i;
        }
    }
 
    /* Our full raw descriptors start here */
    RawFull = RawList->List;
 
    /* Keep track of the current partial raw and translated descriptors */
    CurrentRaw = (PCM_PARTIAL_RESOURCE_DESCRIPTOR)RawList->List;
    CurrentTranslated = (PCM_PARTIAL_RESOURCE_DESCRIPTOR)TranslatedList->List;
 
    /* Do two passes */
    for (ReportType = 0; ReportType < 2; ReportType++)
    {
        /* Pass 0 is for device usage */
        if (ReportType == 0)
        {
            FlagMatch = IDT_DEVICE & ~IDT_REGISTERED;
            Interface = InterfaceType;
        }
        else
        {
            /* Past 1 is for internal HAL usage */
            FlagMatch = IDT_INTERNAL & ~IDT_REGISTERED;
            Interface = Internal;
        }
 
        /* Reset loop variables */
        i = Element = 0;
 
        /* Start looping our address uage list and interrupts */
        CurrentAddress = HalpAddressUsageList;
        while (TRUE)
        {
            /* Check for valid vector number */
            if (i <= MAXIMUM_IDTVECTOR)
            {
                /* Check if this entry should be parsed */
                if ((HalpIDTUsageFlags[i].Flags & FlagMatch))
                {
                    /* Parse it */
                    HalpBuildPartialFromIdt(i, &RawPartial, &TranslatedPartial);
                    i++;
                }
                else
                {
                    /* Skip this entry */
                    i++;
                    continue;
                }
            }
            else
            {
                /* This is an address instead */
                if (!CurrentAddress) break;
 
                /* Check if the address should be reported */
                if (!(CurrentAddress->Flags & FlagMatch) ||
                    !(CurrentAddress->Element[Element].Length))
                {
                    /* Nope, skip it */
                    Element = 0;
                    CurrentAddress = CurrentAddress->Next;
                    continue;
                }
 
                /* Otherwise, parse the entry */
                HalpBuildPartialFromAddress(Interface,
                                            CurrentAddress,
                                            Element,
                                            &RawPartial,
                                            &TranslatedPartial);
                Element++;
            }
 
            /* Check for interface change */
            if (RawFull->InterfaceType != Interface)
            {
                /* We need to add another full descriptor */
                RawList->Count++;
                TranslatedList->Count++;
 
                /* The full descriptor follows wherever we were */
                RawFull = (PCM_FULL_RESOURCE_DESCRIPTOR)CurrentRaw;
                TranslatedFull = (PCM_FULL_RESOURCE_DESCRIPTOR)CurrentTranslated;
 
                /* And it is of this new interface type */
                RawFull->InterfaceType = Interface;
                TranslatedFull->InterfaceType = Interface;
 
                /* And its partial descriptors begin here */
                RawPartialList = &RawFull->PartialResourceList;
                TranslatedPartialList = &TranslatedFull->PartialResourceList;
 
                /* And our next full descriptor should follow here */
                CurrentRaw = RawFull->PartialResourceList.PartialDescriptors;
                CurrentTranslated = TranslatedFull->PartialResourceList.PartialDescriptors;
            }
 
            /* We have written a new partial descriptor */
            RawPartialList->Count++;
            TranslatedPartialList->Count++;
 
            /* Copy our local descriptors into the actual list */
            RtlCopyMemory(CurrentRaw, &RawPartial, sizeof(RawPartial));
            RtlCopyMemory(CurrentTranslated, &TranslatedPartial, sizeof(TranslatedPartial));
 
            /* Move to the next partial descriptor */
            CurrentRaw++;
            CurrentTranslated++;
        }
    }
 
    /* Get the final list of the size for the kernel call later */
    ListSize = (ULONG)((ULONG_PTR)CurrentRaw - (ULONG_PTR)RawList);
 
    /* Now reset back to the first full descriptor */
    RawFull = RawList->List;
    TranslatedFull = TranslatedList->List;
 
    /* And loop all the full descriptors */
    for (i = 0; i < RawList->Count; i++)
    {
        /* Get the first partial descriptor in this list */
        CurrentRaw = RawFull->PartialResourceList.PartialDescriptors;
        CurrentTranslated = TranslatedFull->PartialResourceList.PartialDescriptors;
 
        /* Get the count of partials in this list */
        Count = RawFull->PartialResourceList.Count;
 
        /* Loop all the partials in this list */
        for (j = 0; j < Count; j++)
        {
            /* Get the sort value at this point */
            HalpGetResourceSortValue(CurrentRaw, &CurrentScale, &CurrentSortValue);
 
            /* Save the current sort pointer */
            SortedRaw = CurrentRaw;
            SortedTranslated = CurrentTranslated;
 
            /* Loop all descriptors starting from this one */
            for (k = j; k < Count; k++)
            {
                /* Get the sort value at the sort point */
                HalpGetResourceSortValue(SortedRaw, &SortScale, &SortValue);
 
                /* Check if a swap needs to occur */
                if ((SortScale < CurrentScale) ||
                    ((SortScale == CurrentScale) &&
                     (SortValue.QuadPart <= CurrentSortValue.QuadPart)))
                {
                    /* Swap raw partial with the sort location partial */
                    RtlCopyMemory(&RawPartial, CurrentRaw, sizeof(RawPartial));
                    RtlCopyMemory(CurrentRaw, SortedRaw, sizeof(RawPartial));
                    RtlCopyMemory(SortedRaw, &RawPartial, sizeof(RawPartial));
 
                    /* Swap translated partial in the same way */
                    RtlCopyMemory(&TranslatedPartial, CurrentTranslated, sizeof(TranslatedPartial));
                    RtlCopyMemory(CurrentTranslated, SortedTranslated, sizeof(TranslatedPartial));
                    RtlCopyMemory(SortedTranslated, &TranslatedPartial, sizeof(TranslatedPartial));
 
                    /* Update the sort value at this point */
                    HalpGetResourceSortValue(CurrentRaw, &CurrentScale, &CurrentSortValue);
                }
 
                /* The sort location has been updated */
                SortedRaw++;
                SortedTranslated++;
            }
 
            /* Move to the next partial */
            CurrentRaw++;
            CurrentTranslated++;
        }
 
        /* Move to the next full descriptor */
        RawFull = (PCM_FULL_RESOURCE_DESCRIPTOR)CurrentRaw;
        TranslatedFull = (PCM_FULL_RESOURCE_DESCRIPTOR)CurrentTranslated;
    }
 
    /* Mark this is an ACPI system, if it is */
    HalpMarkAcpiHal();
 
    /* Tell the kernel about all this */
    IoReportHalResourceUsage(HalName,
                             RawList,
                             TranslatedList,
                             ListSize);
 
    /* Free our lists */
    ExFreePool(RawList);
    ExFreePool(TranslatedList);
 
    /* Get the machine's serial number */
    HalpReportSerialNumber();
}

Variable Documentation

HalpAddressUsageList

PADDRESS_USAGE HalpAddressUsageList

Definition at line 17 of file usage.c.

Referenced by HalInitSystem(), and HalpReportResourceUsage().

HalpComIoSpace

ADDRESS_USAGE HalpComIoSpace

Initial value:

=
{
    NULL, CmResourceTypePort, IDT_INTERNAL,
    {
        
        {0x2F8, 0x8},
        {0, 0}
    }
}

Definition at line 41 of file usage.c.

Referenced by HalpReportResourceUsage().

HalpComPortIrqMapping

USHORT HalpComPortIrqMapping[][2]

Initial value:

=
{
    {0x3F8, 4},
    {0x2F8, 3},
    {0x3E8, 4},
    {0x2E8, 3},
    {0, 0}
}

Definition at line 31 of file usage.c.

Referenced by HalpReportResourceUsage().

HalpDefaultIoSpace

ADDRESS_USAGE HalpDefaultIoSpace

Definition at line 51 of file usage.c.

Referenced by HalInitSystem().

HalpGetInfoFromACPI

BOOLEAN HalpGetInfoFromACPI

Definition at line 14 of file usage.c.

Referenced by HalpReportResourceUsage().

HalpIDTUsage

IDTUsage HalpIDTUsage[MAXIMUM_IDTVECTOR+1]

Definition at line 19 of file usage.c.

HalpIDTUsageFlags

IDTUsageFlags HalpIDTUsageFlags[MAXIMUM_IDTVECTOR+1]

Definition at line 18 of file usage.c.

HalpNMIDumpFlag

BOOLEAN HalpNMIDumpFlag

Definition at line 15 of file usage.c.

Referenced by HalpGetNMICrashFlag().

KdComPortInUse

PUCHAR KdComPortInUse

Definition at line 16 of file usage.c.