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/*++
Copyright (c) 2004, Intel Corporation
All rights reserved. This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
Module Name:
Bds.h
Abstract:
Boot Device Selection Architectural Protocol as defined in Tiano
When the DXE core is done it calls the BDS via this protocol.
--*/
#ifndef _ARCH_PROTOCOL_BDS_H_
#define _ARCH_PROTOCOL_BDS_H_
//
// Global ID for the BDS Architectural Protocol
//
#define EFI_BDS_ARCH_PROTOCOL_GUID \
{ 0x665E3FF6, 0x46CC, 0x11d4, 0x9A, 0x38, 0x00, 0x90, 0x27, 0x3F, 0xC1, 0x4D }
//
// Declare forward reference for the BDS Architectural Protocol
//
EFI_FORWARD_DECLARATION (EFI_BDS_ARCH_PROTOCOL);
typedef
VOID
(EFIAPI *EFI_BDS_ENTRY) (
IN EFI_BDS_ARCH_PROTOCOL * This
);
/*++
Routine Description:
This function uses policy data from the platform to determine what operating
system or system utility should be loaded and invoked. This function call
also optionally make the use of user input to determine the operating system
or system utility to be loaded and invoked. When the DXE Core has dispatched
all the drivers on the dispatch queue, this function is called. This
function will attempt to connect the boot devices required to load and invoke
the selected operating system or system utility. During this process,
additional firmware volumes may be discovered that may contain addition DXE
drivers that can be dispatched by the DXE Core. If a boot device cannot be
fully connected, this function calls the DXE Service Dispatch() to allow the
DXE drivers from any newly discovered firmware volumes to be dispatched.
Then the boot device connection can be attempted again. If the same boot
device connection operation fails twice in a row, then that boot device has
failed, and should be skipped. This function should never return.
Arguments:
This - The EFI_BDS_ARCH_PROTOCOL instance.
Returns:
None.
--*/
//
// Interface stucture for the BDS Architectural Protocol
//
typedef struct _EFI_BDS_ARCH_PROTOCOL {
EFI_BDS_ENTRY Entry;
} EFI_BDS_ARCH_PROTOCOL;
/*++
Protocol Description:
The EFI_BDS_ARCH_PROTOCOL transfers control from DXE to an operating
system or a system utility. If there are not enough drivers initialized
when this protocol is used to access the required boot device(s), then
this protocol should add drivers to the dispatch queue and return control
back to the dispatcher. Once the required boot devices are available, then
the boot device can be used to load and invoke an OS or a system utility.
Parameters:
Entry - The entry point to BDS. This call does not take any parameters,
and the return value can be ignored. If it returns, then the
dispatcher must be invoked again, if it never returns, then an
operating system or a system utility have been invoked.
--*/
extern EFI_GUID gEfiBdsArchProtocolGuid;
#endif
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