EdkGenericPlatformBdsLib added
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@2368 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
tgingold
363
EdkModulePkg/Library/EdkGenericPlatformBdsLib/BdsEntry.c
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363
EdkModulePkg/Library/EdkGenericPlatformBdsLib/BdsEntry.c
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/*++
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Copyright (c) 2006, Intel Corporation
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All rights reserved. This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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Module Name:
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BdsEntry.c
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Abstract:
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The entry of the bds
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--*/
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#include "Bds.h"
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#include "FrontPage.h"
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#include "Language.h"
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EFI_BDS_ARCH_PROTOCOL_INSTANCE gBdsInstanceTemplate = {
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EFI_BDS_ARCH_PROTOCOL_INSTANCE_SIGNATURE,
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NULL,
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{
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BdsEntry
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},
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0xFFFF,
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TRUE,
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EXTENSIVE
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};
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UINT16 *mBootNext = NULL;
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EFI_HANDLE mBdsImageHandle;
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EFI_STATUS
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EFIAPI
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BdsInitialize (
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IN EFI_HANDLE ImageHandle,
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IN EFI_SYSTEM_TABLE *SystemTable
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)
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/*++
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Routine Description:
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Install Boot Device Selection Protocol
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Arguments:
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(Standard EFI Image entry - EFI_IMAGE_ENTRY_POINT)
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Returns:
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EFI_SUCEESS - BDS has finished initializing.
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Rerun the
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dispatcher and recall BDS.Entry
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Other - Return value from EfiLibAllocatePool()
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or gBS->InstallProtocolInterface
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--*/
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{
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EFI_STATUS Status;
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mBdsImageHandle = ImageHandle;
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//
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// Install protocol interface
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//
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Status = gBS->InstallProtocolInterface (
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&gBdsInstanceTemplate.Handle,
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&gEfiBdsArchProtocolGuid,
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EFI_NATIVE_INTERFACE,
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&gBdsInstanceTemplate.Bds
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);
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ASSERT_EFI_ERROR (Status);
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return Status;
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}
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VOID
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BdsBootDeviceSelect (
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VOID
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)
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/*++
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Routine Description:
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In the loop of attempt to boot for the boot order
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Arguments:
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None.
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Returns:
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None.
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--*/
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{
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EFI_STATUS Status;
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LIST_ENTRY *Link;
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BDS_COMMON_OPTION *BootOption;
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UINTN ExitDataSize;
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CHAR16 *ExitData;
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UINT16 Timeout;
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LIST_ENTRY BootLists;
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CHAR16 Buffer[20];
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BOOLEAN BootNextExist;
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LIST_ENTRY *LinkBootNext;
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//
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// Got the latest boot option
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//
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BootNextExist = FALSE;
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LinkBootNext = NULL;
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InitializeListHead (&BootLists);
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//
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// First check the boot next option
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//
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ZeroMem (Buffer, sizeof (Buffer));
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if (mBootNext != NULL) {
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//
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// Indicate we have the boot next variable, so this time
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// boot will always have this boot option
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//
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BootNextExist = TRUE;
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//
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// Clear the this variable so it's only exist in this time boot
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//
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gRT->SetVariable (
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L"BootNext",
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&gEfiGlobalVariableGuid,
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EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_NON_VOLATILE,
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0,
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mBootNext
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);
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//
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// Add the boot next boot option
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//
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UnicodeSPrint (Buffer, sizeof (Buffer), L"Boot%04x", *mBootNext);
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BootOption = BdsLibVariableToOption (&BootLists, Buffer);
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}
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//
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// Parse the boot order to get boot option
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//
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BdsLibBuildOptionFromVar (&BootLists, L"BootOrder");
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Link = BootLists.ForwardLink;
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//
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// Parameter check, make sure the loop will be valid
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//
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if (Link == NULL) {
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return ;
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}
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//
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// Here we make the boot in a loop, every boot success will
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// return to the front page
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//
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for (;;) {
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//
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// Check the boot option list first
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//
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if (Link == &BootLists) {
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//
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// There are two ways to enter here:
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// 1. There is no active boot option, give user chance to
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// add new boot option
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// 2. All the active boot option processed, and there is no
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// one is success to boot, then we back here to allow user
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// add new active boot option
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//
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Timeout = 0xffff;
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PlatformBdsEnterFrontPage (Timeout, FALSE);
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InitializeListHead (&BootLists);
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BdsLibBuildOptionFromVar (&BootLists, L"BootOrder");
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Link = BootLists.ForwardLink;
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continue;
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}
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//
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// Get the boot option from the link list
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//
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BootOption = CR (Link, BDS_COMMON_OPTION, Link, BDS_LOAD_OPTION_SIGNATURE);
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//
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// According to EFI Specification, if a load option is not marked
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// as LOAD_OPTION_ACTIVE, the boot manager will not automatically
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// load the option.
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//
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if (!IS_LOAD_OPTION_TYPE (BootOption->Attribute, LOAD_OPTION_ACTIVE)) {
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//
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// skip the header of the link list, becuase it has no boot option
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//
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Link = Link->ForwardLink;
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continue;
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}
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//
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// Make sure the boot option device path connected,
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// but ignore the BBS device path
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//
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if (DevicePathType (BootOption->DevicePath) != BBS_DEVICE_PATH) {
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//
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// Notes: the internal shell can not been connected with device path
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// so we do not check the status here
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//
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BdsLibConnectDevicePath (BootOption->DevicePath);
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}
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//
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// All the driver options should have been processed since
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// now boot will be performed.
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//
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PERF_END (0, BDS_TOK, NULL, 0);
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Status = BdsLibBootViaBootOption (BootOption, BootOption->DevicePath, &ExitDataSize, &ExitData);
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if (EFI_ERROR (Status)) {
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//
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// Call platform action to indicate the boot fail
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//
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PlatformBdsBootFail (BootOption, Status, ExitData, ExitDataSize);
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//
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// Check the next boot option
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//
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Link = Link->ForwardLink;
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} else {
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//
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// Call platform action to indicate the boot success
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//
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PlatformBdsBootSuccess (BootOption);
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//
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// Boot success, then stop process the boot order, and
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// present the boot manager menu, front page
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//
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Timeout = 0xffff;
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PlatformBdsEnterFrontPage (Timeout, FALSE);
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//
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// Rescan the boot option list, avoid pertential risk of the boot
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// option change in front page
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//
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if (BootNextExist) {
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LinkBootNext = BootLists.ForwardLink;
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}
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InitializeListHead (&BootLists);
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if (LinkBootNext != NULL) {
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//
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// Reserve the boot next option
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//
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InsertTailList (&BootLists, LinkBootNext);
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}
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BdsLibBuildOptionFromVar (&BootLists, L"BootOrder");
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Link = BootLists.ForwardLink;
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}
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}
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return ;
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}
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VOID
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EFIAPI
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BdsEntry (
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IN EFI_BDS_ARCH_PROTOCOL *This
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)
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/*++
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Routine Description:
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Service routine for BdsInstance->Entry(). Devices are connected, the
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consoles are initialized, and the boot options are tried.
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Arguments:
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This - Protocol Instance structure.
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Returns:
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EFI_SUCEESS - BDS->Entry has finished executing.
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--*/
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{
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EFI_BDS_ARCH_PROTOCOL_INSTANCE *PrivateData;
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LIST_ENTRY DriverOptionList;
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LIST_ENTRY BootOptionList;
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UINTN BootNextSize;
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//
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// Insert the performance probe
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//
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PERF_END (0, DXE_TOK, NULL, 0);
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PERF_START (0, BDS_TOK, NULL, 0);
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//
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// Initialize the global system boot option and driver option
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//
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InitializeListHead (&DriverOptionList);
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InitializeListHead (&BootOptionList);
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//
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// Get the BDS private data
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//
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PrivateData = EFI_BDS_ARCH_PROTOCOL_INSTANCE_FROM_THIS (This);
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//
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// Do the platform init, can be customized by OEM/IBV
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//
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PERF_START (0, "PlatformBds", "BDS", 0);
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PlatformBdsInit (PrivateData);
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//
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// Initialize the platform specific string and language
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//
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InitializeStringSupport ();
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InitializeLanguage (TRUE);
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InitializeFrontPage (FALSE);
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//
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// Set up the device list based on EFI 1.1 variables
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// process Driver#### and Load the driver's in the
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// driver option list
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//
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BdsLibBuildOptionFromVar (&DriverOptionList, L"DriverOrder");
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if (!IsListEmpty (&DriverOptionList)) {
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BdsLibLoadDrivers (&DriverOptionList);
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}
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//
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// Check if we have the boot next option
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//
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mBootNext = BdsLibGetVariableAndSize (
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L"BootNext",
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&gEfiGlobalVariableGuid,
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&BootNextSize
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);
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//
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// Setup some platform policy here
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//
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PlatformBdsPolicyBehavior (PrivateData, &DriverOptionList, &BootOptionList);
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PERF_END (0, "PlatformBds", "BDS", 0);
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//
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// BDS select the boot device to load OS
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//
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BdsBootDeviceSelect ();
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//
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// Only assert here since this is the right behavior, we should never
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// return back to DxeCore.
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//
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ASSERT (FALSE);
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}
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