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67 lines
2.5 KiB
C
67 lines
2.5 KiB
C
/** @file
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Boot Device Selection Architectural Protocol as defined in PI spec Volume 2 DXE
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When the DXE core is done it calls the BDS via this protocol.
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Copyright (c) 2006 - 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 __ARCH_PROTOCOL_BDS_H__
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#define __ARCH_PROTOCOL_BDS_H__
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///
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/// Global ID for the BDS Architectural Protocol
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///
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#define EFI_BDS_ARCH_PROTOCOL_GUID \
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{ 0x665E3FF6, 0x46CC, 0x11d4, {0x9A, 0x38, 0x00, 0x90, 0x27, 0x3F, 0xC1, 0x4D } }
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///
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/// Declare forward reference for the BDS Architectural Protocol
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///
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typedef struct _EFI_BDS_ARCH_PROTOCOL EFI_BDS_ARCH_PROTOCOL;
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/**
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This function uses policy data from the platform to determine what operating
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system or system utility should be loaded and invoked. This function call
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also optionally make the use of user input to determine the operating system
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or system utility to be loaded and invoked. When the DXE Core has dispatched
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all the drivers on the dispatch queue, this function is called. This
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function will attempt to connect the boot devices required to load and invoke
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the selected operating system or system utility. During this process,
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additional firmware volumes may be discovered that may contain addition DXE
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drivers that can be dispatched by the DXE Core. If a boot device cannot be
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fully connected, this function calls the DXE Service Dispatch() to allow the
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DXE drivers from any newly discovered firmware volumes to be dispatched.
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Then the boot device connection can be attempted again. If the same boot
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device connection operation fails twice in a row, then that boot device has
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failed, and should be skipped. This function should never return.
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@param This The EFI_BDS_ARCH_PROTOCOL instance.
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@return None.
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**/
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typedef
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VOID
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(EFIAPI *EFI_BDS_ENTRY)(
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IN EFI_BDS_ARCH_PROTOCOL *This
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);
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///
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/// The EFI_BDS_ARCH_PROTOCOL transfers control from DXE to an operating
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/// system or a system utility. If there are not enough drivers initialized
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/// when this protocol is used to access the required boot device(s), then
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/// this protocol should add drivers to the dispatch queue and return control
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/// back to the dispatcher. Once the required boot devices are available, then
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/// the boot device can be used to load and invoke an OS or a system utility.
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///
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struct _EFI_BDS_ARCH_PROTOCOL {
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EFI_BDS_ENTRY Entry;
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};
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extern EFI_GUID gEfiBdsArchProtocolGuid;
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#endif
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