arbbus.c File Reference

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

Include dependency graph for arbbus.c:

Go to the source code of this file.

Macros
#define	NDEBUG

Functions
NTSTATUS NTAPI	IopArbBusNumberUnpackRequirements (_In_ PIO_RESOURCE_DESCRIPTOR IoDescriptor, _Out_ PUINT64 OutMinimumAddress, _Out_ PUINT64 OutMaximumAddress, _Out_ PUINT64 OutLength, _Out_ PUINT64 OutAlignment)
NTSTATUS NTAPI	IopArbBusNumberPackResource (_In_ PIO_RESOURCE_DESCRIPTOR IoDescriptor, _In_ UINT64 Start, _Out_ PCM_PARTIAL_RESOURCE_DESCRIPTOR CmDescriptor)
NTSTATUS NTAPI	IopArbBusNumberUnpackResource (_In_ PCM_PARTIAL_RESOURCE_DESCRIPTOR CmDescriptor, _Out_ PUINT64 Start, _Out_ PUINT64 OutLength)
INT32 NTAPI	IopArbBusNumberScoreRequirement (_In_ PIO_RESOURCE_DESCRIPTOR IoDescriptor)
NTSTATUS NTAPI	IopArbBusNumberInitialize (VOID)
	Initialize the RootBusArbiter.

Variables
ARBITER_INSTANCE	IopRootBusNumberArbiter

Macro Definition Documentation

NDEBUG

#define NDEBUG

Definition at line 11 of file arbbus.c.

Function Documentation

IopArbBusNumberInitialize()

NTSTATUS NTAPI IopArbBusNumberInitialize

(

VOID

)

Initialize the RootBusArbiter.

The root bus-number arbiter owns the flat 0..255 bus-number space and hands each bridge a sub-range.

Returns

NTSTATUS

Return values

STATUS_SUCCESS
STATUS_UNSUCCESSFUL
STATUS_INSUFFICIENT_RESOURCES

Definition at line 100 of file arbbus.c.

{
    NTSTATUS Status = STATUS_UNSUCCESSFUL;
 
    PAGED_CODE();
    IopRootBusNumberArbiter.Name = L"RootBusNumber";
    IopRootBusNumberArbiter.UnpackRequirement = IopArbBusNumberUnpackRequirements;
    IopRootBusNumberArbiter.PackResource = IopArbBusNumberPackResource;
    IopRootBusNumberArbiter.UnpackResource = IopArbBusNumberUnpackResource;
    IopRootBusNumberArbiter.ScoreRequirement = IopArbBusNumberScoreRequirement;
 
    Status = ArbiterLibInitializeInstance(&IopRootBusNumberArbiter,
                                          NULL,
                                          CmResourceTypeBusNumber,
                                          IopRootBusNumberArbiter.Name,
                                          L"Root",
                                          NULL);
    if (!NT_SUCCESS(Status))
    {
        DPRINT1("IopArbBusNumberInitialize: Failed with %X", Status);
    }
 
    return Status;
}

Referenced by IopInitializeArbiters().

IopArbBusNumberPackResource()

NTSTATUS NTAPI IopArbBusNumberPackResource	(	_In_ PIO_RESOURCE_DESCRIPTOR	IoDescriptor,
		_In_ UINT64	Start,
		_Out_ PCM_PARTIAL_RESOURCE_DESCRIPTOR	CmDescriptor
	)

Definition at line 41 of file arbbus.c.

{
    PAGED_CODE();
 
    CmDescriptor->Type = CmResourceTypeBusNumber;
    CmDescriptor->ShareDisposition = IoDescriptor->ShareDisposition;
    CmDescriptor->Flags = IoDescriptor->Flags;
    CmDescriptor->u.BusNumber.Start = (ULONG)Start;
    CmDescriptor->u.BusNumber.Length = IoDescriptor->u.BusNumber.Length;
 
    return STATUS_SUCCESS;
}

Referenced by IopArbBusNumberInitialize().

IopArbBusNumberScoreRequirement()

INT32 NTAPI IopArbBusNumberScoreRequirement

(

_In_ PIO_RESOURCE_DESCRIPTOR

IoDescriptor

)

Definition at line 74 of file arbbus.c.

{
    PAGED_CODE();
 
    ASSERT(IoDescriptor->u.BusNumber.Length != 0);
    if (IoDescriptor->u.BusNumber.Length == 0)
        return -1;
 
    return (IoDescriptor->u.BusNumber.MaxBusNumber - IoDescriptor->u.BusNumber.MinBusNumber)
           / IoDescriptor->u.BusNumber.Length;
}

Referenced by IopArbBusNumberInitialize().

IopArbBusNumberUnpackRequirements()

NTSTATUS NTAPI IopArbBusNumberUnpackRequirements	(	_In_ PIO_RESOURCE_DESCRIPTOR	IoDescriptor,
		_Out_ PUINT64	OutMinimumAddress,
		_Out_ PUINT64	OutMaximumAddress,
		_Out_ PUINT64	OutLength,
		_Out_ PUINT64	OutAlignment
	)

Definition at line 22 of file arbbus.c.

{
    PAGED_CODE();
 
    *OutMinimumAddress = IoDescriptor->u.BusNumber.MinBusNumber;
    *OutMaximumAddress = IoDescriptor->u.BusNumber.MaxBusNumber;
    *OutLength = IoDescriptor->u.BusNumber.Length;
    *OutAlignment = 1;
 
    return STATUS_SUCCESS;
}

Referenced by IopArbBusNumberInitialize().

IopArbBusNumberUnpackResource()

NTSTATUS NTAPI IopArbBusNumberUnpackResource	(	_In_ PCM_PARTIAL_RESOURCE_DESCRIPTOR	CmDescriptor,
		_Out_ PUINT64	Start,
		_Out_ PUINT64	OutLength
	)

Definition at line 59 of file arbbus.c.

{
    PAGED_CODE();
 
    *Start  = CmDescriptor->u.BusNumber.Start;
    *OutLength = CmDescriptor->u.BusNumber.Length;
 
    return STATUS_SUCCESS;
}

Referenced by IopArbBusNumberInitialize().

Variable Documentation

IopRootBusNumberArbiter

ARBITER_INSTANCE IopRootBusNumberArbiter

extern

Definition at line 23 of file pnpinit.c.

Referenced by IopArbBusNumberInitialize().