#include <hal.h>
#include <arbiter.h>

Include dependency graph for legacypcirqarb.c:

Functions
static NTSTATUS NTAPI	HalpLegacyPCArbUnpackRequirement (_In_ PIO_RESOURCE_DESCRIPTOR IoDescriptor, _Out_ PUINT64 OutMinimumAddress, _Out_ PUINT64 OutMaximumAddress, _Out_ PUINT64 OutLength, _Out_ PUINT64 OutAlignment)

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

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

static INT32 NTAPI	HalpLegacyPCArbScoreRequirement (_In_ PIO_RESOURCE_DESCRIPTOR IoDescriptor)

static VOID NTAPI	HalpLegacyPCArbReference (PVOID Context)

static VOID NTAPI	HalpLegacyPCArbDereference (PVOID Context)

NTSTATUS NTAPI	HalpLegacyPCCreateArbiter (_In_ PDEVICE_OBJECT BusFdo)
	Initialize the legacy PC arbiter that uses PIR for PIC IRQ assignments.

NTSTATUS NTAPI	HalpLegacyPCQueryArbInterface (_Out_writes_bytes_(Size) PVOID Interface, _In_ ULONG Size, _Out_ PULONG Length)
	Query the legacy PC Arbiter.

Variables
static ARBITER_INSTANCE	LegacyPCArbiter

Function Documentation

◆ HalpLegacyPCArbDereference()

static VOID NTAPI HalpLegacyPCArbDereference ( PVOID Context )

static

Definition at line 108 of file legacypcirqarb.c.

{
    NOTHING;
}

Referenced by HalpLegacyPCQueryArbInterface().

◆ HalpLegacyPCArbPackResource()

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

static

Definition at line 39 of file legacypcirqarb.c.

{
    PAGED_CODE();
 
    ASSERT(IoDescriptor->Type == CmResourceTypeInterrupt);
 
    /* Our vectors live in a ULONG, and the PIR table never goes past 15 anyway. */
    if (Start > MAXULONG)
        return STATUS_INVALID_PARAMETER;
 
    CmDescriptor->Type = CmResourceTypeInterrupt;
    CmDescriptor->ShareDisposition = IoDescriptor->ShareDisposition;
    CmDescriptor->Flags = IoDescriptor->Flags;
    CmDescriptor->u.Interrupt.Level = (ULONG)Start;
    CmDescriptor->u.Interrupt.Vector = (ULONG)Start;
    CmDescriptor->u.Interrupt.Affinity = (KAFFINITY)-1;
    return STATUS_SUCCESS;
}

Referenced by HalpLegacyPCCreateArbiter().

◆ HalpLegacyPCArbReference()

static VOID NTAPI HalpLegacyPCArbReference ( PVOID Context )

static

Definition at line 100 of file legacypcirqarb.c.

{
    NOTHING;
}

Referenced by HalpLegacyPCQueryArbInterface().

◆ HalpLegacyPCArbScoreRequirement()

static INT32 NTAPI HalpLegacyPCArbScoreRequirement ( _In_ PIO_RESOURCE_DESCRIPTOR IoDescriptor )

static

Definition at line 83 of file legacypcirqarb.c.

{
    INT32 ScoreReg;
 
    PAGED_CODE();
 
    ASSERT(IoDescriptor->Type == CmResourceTypeInterrupt);
 
    ScoreReg = (INT32)(IoDescriptor->u.Interrupt.MaximumVector - IoDescriptor->u.Interrupt.MinimumVector + 1);
 
    return (ScoreReg < 0) ? MAXLONG : ScoreReg;
}

Referenced by HalpLegacyPCCreateArbiter().

◆ HalpLegacyPCArbUnpackRequirement()

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

static

Definition at line 17 of file legacypcirqarb.c.

{
    PAGED_CODE();
 
    ASSERT(IoDescriptor->Type == CmResourceTypeInterrupt);
 
    *OutMinimumAddress = (UINT64)IoDescriptor->u.Interrupt.MinimumVector;
    *OutMaximumAddress = (UINT64)IoDescriptor->u.Interrupt.MaximumVector;
    *OutLength = 1;
    *OutAlignment = 1;
    return STATUS_SUCCESS;
}

Referenced by HalpLegacyPCCreateArbiter().

◆ HalpLegacyPCArbUnpackResource()

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

static

Definition at line 65 of file legacypcirqarb.c.

{
    PAGED_CODE();
 
    ASSERT(CmDescriptor->Type == CmResourceTypeInterrupt);
 
    *Start = CmDescriptor->u.Interrupt.Vector;
    *OutLength = 1;
    return STATUS_SUCCESS;
}

Referenced by HalpLegacyPCCreateArbiter().

◆ HalpLegacyPCCreateArbiter()

NTSTATUS NTAPI HalpLegacyPCCreateArbiter ( _In_ PDEVICE_OBJECT BusFdo )

Initialize the legacy PC arbiter that uses PIR for PIC IRQ assignments.

Parameters

[in] BusFdo Hal Bus FDO deviceobject

Definition at line 123 of file legacypcirqarb.c.

{
    NTSTATUS Status;
 
    PAGED_CODE();
 
    LegacyPCArbiter.UnpackRequirement = HalpLegacyPCArbUnpackRequirement;
    LegacyPCArbiter.PackResource = HalpLegacyPCArbPackResource;
    LegacyPCArbiter.UnpackResource = HalpLegacyPCArbUnpackResource;
    LegacyPCArbiter.ScoreRequirement = HalpLegacyPCArbScoreRequirement;
 
    /*
     * TODO: Later we'll override more when we implement PIR.
     * The most important piece for now here is the clamp.
     * This will let us boot for now, preserving orignal reactos behavior.
     * (Plug and Pray)
     */
 
    Status = ArbiterLibInitializeInstance(&LegacyPCArbiter,
                                          BusFdo,
                                          CmResourceTypeInterrupt,
                                          L"HalIRQ",
                                          L"Root",
                                          NULL);
    if (!NT_SUCCESS(Status))
    {
        return Status;
    }
 
    /* Lock to the 0-15 the PIR table only understands. */
    RtlAddRange(LegacyPCArbiter.Allocation, 16, ARBITER_MAXIMUM_ADDRESS, 0,
                RTL_RANGE_LIST_ADD_IF_CONFLICT, NULL, NULL);
    RtlAddRange(LegacyPCArbiter.Allocation, PIC_CASCADE_IRQ, PIC_CASCADE_IRQ,
                0, RTL_RANGE_LIST_ADD_IF_CONFLICT, NULL, NULL);
 
    return Status;
}

Referenced by HalpQueryInterface().

◆ HalpLegacyPCQueryArbInterface()

NTSTATUS NTAPI HalpLegacyPCQueryArbInterface	(	_Out_writes_bytes_(Size) PVOID	Interface,
		_In_ ULONG	Size,
		_Out_ PULONG	Length
	)

Query the legacy PC Arbiter.

Parameters

[out]	Interface	Caller-supplied buffer that receives the ARBITER_INTERFACE.
[in]	Size	Size of the Interface buffer, in bytes.
[out]	Length	Receives sizeof(ARBITER_INTERFACE), whether or not the buffer was large enough.

Returns: STATUS_SUCCESS on success, or STATUS_BUFFER_TOO_SMALL if Size is smaller than sizeof(ARBITER_INTERFACE).

Definition at line 183 of file legacypcirqarb.c.

{
    PARBITER_INTERFACE ArbiterInterface = Interface;
 
    PAGED_CODE();
 
    *Length = sizeof(*ArbiterInterface);
    if (Size < sizeof(*ArbiterInterface))
        return STATUS_BUFFER_TOO_SMALL;
 
    ArbiterInterface->Size = sizeof(*ArbiterInterface);
    ArbiterInterface->Version = 1;
    ArbiterInterface->Context = &LegacyPCArbiter;
    ArbiterInterface->ArbiterHandler = ArbiterLibHandler;
    ArbiterInterface->Flags = 0;
 
    ArbiterInterface->InterfaceDereference = HalpLegacyPCArbDereference;
    ArbiterInterface->InterfaceReference = HalpLegacyPCArbReference;
 
    return STATUS_SUCCESS;
}