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99 lines
2.5 KiB
C
99 lines
2.5 KiB
C
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/** @file
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EFI Deferred Procedure Call Protocol.
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Copyright (c) 2007 - 2018, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#ifndef __DPC_H__
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#define __DPC_H__
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//
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// DPC Protocol GUID value
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//
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#define EFI_DPC_PROTOCOL_GUID \
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{ \
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0x480f8ae9, 0xc46, 0x4aa9, { 0xbc, 0x89, 0xdb, 0x9f, 0xba, 0x61, 0x98, 0x6 } \
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}
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//
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// Forward reference for pure ANSI compatability
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//
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typedef struct _EFI_DPC_PROTOCOL EFI_DPC_PROTOCOL;
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/**
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Invoke a Deferred Procedure Call.
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@param DpcContext The pointer to the Deferred Procedure Call's context,
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which is implementation dependent.
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**/
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typedef
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VOID
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(EFIAPI *EFI_DPC_PROCEDURE)(
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IN VOID *DpcContext
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);
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/**
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Add a Deferred Procedure Call to the end of the DPC queue.
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@param This The protocol instance pointer.
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@param DpcTpl The EFI_TPL that the DPC should invoke.
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@param DpcProcedure The pointer to the DPC's function.
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@param DpcContext The pointer to the DPC's context. Passed to DpcProcedure
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when DpcProcedure is invoked.
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@retval EFI_SUCCESS The DPC was queued.
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@retval EFI_INVALID_PARAMETER DpcTpl is not a valid EFI_TPL.
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@retval EFI_INVALID_PARAMETER DpcProcedure is NULL.
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@retval EFI_OUT_OF_RESOURCES There are not enough resources available to
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add the DPC to the queue.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_DPC_QUEUE_DPC)(
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IN EFI_DPC_PROTOCOL *This,
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IN EFI_TPL DpcTpl,
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IN EFI_DPC_PROCEDURE DpcProcedure,
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IN VOID *DpcContext OPTIONAL
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);
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/**
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Dispatch the queue of DPCs.
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DPCs with DpcTpl value greater than the current TPL value are queued, and then DPCs
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with DpcTpl value lower than the current TPL value are queued. All DPCs in the first
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group (higher DpcTpl values) are invoked before DPCs in the second group (lower DpcTpl values).
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@param This Protocol instance pointer.
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@retval EFI_SUCCESS One or more DPCs were invoked.
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@retval EFI_NOT_FOUND No DPCs were invoked.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_DPC_DISPATCH_DPC)(
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IN EFI_DPC_PROTOCOL *This
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);
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///
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/// DPC Protocol structure.
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///
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struct _EFI_DPC_PROTOCOL {
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EFI_DPC_QUEUE_DPC QueueDpc;
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EFI_DPC_DISPATCH_DPC DispatchDpc;
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};
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///
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/// DPC Protocol GUID variable.
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///
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extern EFI_GUID gEfiDpcProtocolGuid;
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#endif
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