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system76-edk2/ArmPlatformPkg/Bds/BootOption.c
Ronald Cron 6332ffb0af ArmPlatformPkg/Bds: Remove any use of the "Fdt" UEFI variable 
Remove the option to update the "Fdt" UEFI variable in the ARM BDS as
the "setfdt" EFI Shell command provides this service from now.

Remove the use of this variable in the legacy kernel boot loader and
use the FDT installed in the configuration table instead.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Ronald Cron <Ronald.Cron@arm.com>
Reviewed-by: Olivier Martin <olivier.martin@arm.com>



git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16940 6f19259b-4bc3-4df7-8a09-765794883524
2015-02-26 11:02:39 +00:00

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/** @file
*
* Copyright (c) 2011-2014, ARM Limited. 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.
*
**/
#include <Guid/ArmGlobalVariableHob.h>
#include "BdsInternal.h"
EFI_STATUS
BootOptionStart (
IN BDS_LOAD_OPTION *BootOption
)
{
EFI_STATUS Status;
UINT32 LoaderType;
ARM_BDS_LOADER_OPTIONAL_DATA* OptionalData;
ARM_BDS_LINUX_ARGUMENTS* LinuxArguments;
UINTN CmdLineSize;
UINTN InitrdSize;
EFI_DEVICE_PATH* Initrd;
UINT16 LoadOptionIndexSize;
if (IS_ARM_BDS_BOOTENTRY (BootOption)) {
Status = EFI_UNSUPPORTED;
OptionalData = BootOption->OptionalData;
LoaderType = ReadUnaligned32 ((CONST UINT32*)&OptionalData->Header.LoaderType);
if (LoaderType == BDS_LOADER_EFI_APPLICATION) {
if ((BootOption->Attributes & LOAD_OPTION_CATEGORY) == LOAD_OPTION_CATEGORY_APP) {
// Need to connect every drivers to ensure no dependencies are missing for the application
BdsConnectAllDrivers ();
}
Status = BdsStartEfiApplication (gImageHandle, BootOption->FilePathList, 0, NULL);
} else if (LoaderType == BDS_LOADER_KERNEL_LINUX_ATAG) {
LinuxArguments = &(OptionalData->Arguments.LinuxArguments);
CmdLineSize = ReadUnaligned16 ((CONST UINT16*)&LinuxArguments->CmdLineSize);
InitrdSize = ReadUnaligned16 ((CONST UINT16*)&LinuxArguments->InitrdSize);
if (InitrdSize > 0) {
Initrd = GetAlignedDevicePath ((EFI_DEVICE_PATH*)((UINTN)(LinuxArguments + 1) + CmdLineSize));
} else {
Initrd = NULL;
}
Status = BdsBootLinuxAtag (BootOption->FilePathList,
Initrd, // Initrd
(CHAR8*)(LinuxArguments + 1)); // CmdLine
} else if (LoaderType == BDS_LOADER_KERNEL_LINUX_FDT) {
LinuxArguments = &(OptionalData->Arguments.LinuxArguments);
CmdLineSize = ReadUnaligned16 ((CONST UINT16*)&LinuxArguments->CmdLineSize);
InitrdSize = ReadUnaligned16 ((CONST UINT16*)&LinuxArguments->InitrdSize);
if (InitrdSize > 0) {
Initrd = GetAlignedDevicePath ((EFI_DEVICE_PATH*)((UINTN)(LinuxArguments + 1) + CmdLineSize));
} else {
Initrd = NULL;
}
Status = BdsBootLinuxFdt (
BootOption->FilePathList,
Initrd,
(CHAR8*)(LinuxArguments + 1)
);
}
} else {
// Connect all the drivers if the EFI Application is not a EFI OS Loader
if ((BootOption->Attributes & LOAD_OPTION_CATEGORY) == LOAD_OPTION_CATEGORY_APP) {
BdsConnectAllDrivers ();
}
// Set BootCurrent variable
LoadOptionIndexSize = sizeof(UINT16);
gRT->SetVariable (L"BootCurrent", &gEfiGlobalVariableGuid,
EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
LoadOptionIndexSize, &(BootOption->LoadOptionIndex));
Status = BdsStartEfiApplication (gImageHandle, BootOption->FilePathList, BootOption->OptionalDataSize, BootOption->OptionalData);
// Clear BootCurrent variable
LoadOptionIndexSize = sizeof(UINT16);
gRT->SetVariable (L"BootCurrent", &gEfiGlobalVariableGuid,
EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
0, NULL);
}
return Status;
}
EFI_STATUS
BootOptionList (
IN OUT LIST_ENTRY *BootOptionList
)
{
EFI_STATUS Status;
UINTN Index;
UINT16* BootOrder;
UINTN BootOrderSize;
BDS_LOAD_OPTION* BdsLoadOption;
BDS_LOAD_OPTION_ENTRY* BdsLoadOptionEntry;
InitializeListHead (BootOptionList);
// Get the Boot Option Order from the environment variable
Status = GetGlobalEnvironmentVariable (L"BootOrder", NULL, &BootOrderSize, (VOID**)&BootOrder);
if (EFI_ERROR(Status)) {
return Status;
}
for (Index = 0; Index < BootOrderSize / sizeof (UINT16); Index++) {
Status = BootOptionFromLoadOptionIndex (BootOrder[Index], &BdsLoadOption);
if (!EFI_ERROR(Status)) {
BdsLoadOptionEntry = (BDS_LOAD_OPTION_ENTRY*)AllocatePool(sizeof(BDS_LOAD_OPTION_ENTRY));
BdsLoadOptionEntry->BdsLoadOption = BdsLoadOption;
InsertTailList (BootOptionList,&BdsLoadOptionEntry->Link);
}
}
FreePool (BootOrder);
return EFI_SUCCESS;
}
STATIC
EFI_STATUS
BootOptionSetFields (
IN BDS_LOAD_OPTION* BootOption,
IN UINT32 Attributes,
IN CHAR16* BootDescription,
IN EFI_DEVICE_PATH_PROTOCOL* DevicePath,
IN ARM_BDS_LOADER_TYPE BootType,
IN UINT8* OptionalData,
IN UINTN OptionalDataSize
)
{
EFI_LOAD_OPTION EfiLoadOption;
UINTN EfiLoadOptionSize;
UINTN BootDescriptionSize;
UINT16 FilePathListLength;
UINT8* EfiLoadOptionPtr;
UINT8* InitrdPathListPtr;
ARM_BDS_LINUX_ARGUMENTS* DestLinuxArguments;
ARM_BDS_LINUX_ARGUMENTS* SrcLinuxArguments;
ARM_BDS_LOADER_ARGUMENTS* BootArguments;
// If we are overwriting an existent Boot Option then we have to free previously allocated memory
if (BootOption->LoadOption) {
FreePool (BootOption->LoadOption);
}
BootDescriptionSize = StrSize (BootDescription);
// Fixup the size in case of entry specific to ArmPlatformPkg/Bds
if ((BootType == BDS_LOADER_KERNEL_LINUX_ATAG) || (BootType == BDS_LOADER_KERNEL_LINUX_FDT)) {
OptionalDataSize += sizeof(ARM_BDS_LOADER_OPTIONAL_DATA_HEADER);
}
// Compute the size of the FilePath list
FilePathListLength = GetUnalignedDevicePathSize (DevicePath);
// Allocate the memory for the EFI Load Option
EfiLoadOptionSize = sizeof(UINT32) + sizeof(UINT16) + BootDescriptionSize + FilePathListLength + OptionalDataSize;
EfiLoadOption = (EFI_LOAD_OPTION)AllocatePool(EfiLoadOptionSize);
EfiLoadOptionPtr = EfiLoadOption;
//
// Populate the EFI Load Option and BDS Boot Option structures
//
// Attributes fields
BootOption->Attributes = Attributes;
*(UINT32*)EfiLoadOptionPtr = Attributes;
EfiLoadOptionPtr += sizeof(UINT32);
// FilePath List fields
BootOption->FilePathListLength = FilePathListLength;
*(UINT16*)EfiLoadOptionPtr = FilePathListLength;
EfiLoadOptionPtr += sizeof(UINT16);
// Boot description fields
BootOption->Description = (CHAR16*)EfiLoadOptionPtr;
CopyMem (EfiLoadOptionPtr, BootDescription, BootDescriptionSize);
EfiLoadOptionPtr += BootDescriptionSize;
// File path fields
BootOption->FilePathList = (EFI_DEVICE_PATH_PROTOCOL*)EfiLoadOptionPtr;
CopyMem (EfiLoadOptionPtr, DevicePath, FilePathListLength);
EfiLoadOptionPtr += FilePathListLength;
// Optional Data fields, Do unaligned writes
BootOption->OptionalData = EfiLoadOptionPtr;
if ((BootType == BDS_LOADER_KERNEL_LINUX_ATAG) || (BootType == BDS_LOADER_KERNEL_LINUX_FDT)) {
// Write the header
WriteUnaligned32 ((UINT32 *)EfiLoadOptionPtr, ARM_BDS_OPTIONAL_DATA_SIGNATURE);
WriteUnaligned32 ((UINT32 *)(EfiLoadOptionPtr + 4), BootType);
// OptionalData should have been initialized by the caller of this function
ASSERT (OptionalData != NULL);
BootArguments = (ARM_BDS_LOADER_ARGUMENTS*)OptionalData;
SrcLinuxArguments = &(BootArguments->LinuxArguments);
DestLinuxArguments = &((ARM_BDS_LOADER_OPTIONAL_DATA*)EfiLoadOptionPtr)->Arguments.LinuxArguments;
WriteUnaligned16 ((UINT16 *)&(DestLinuxArguments->CmdLineSize), SrcLinuxArguments->CmdLineSize);
WriteUnaligned16 ((UINT16 *)&(DestLinuxArguments->InitrdSize), SrcLinuxArguments->InitrdSize);
if (SrcLinuxArguments->CmdLineSize > 0) {
CopyMem ((VOID*)(DestLinuxArguments + 1), (VOID*)(SrcLinuxArguments + 1), SrcLinuxArguments->CmdLineSize);
}
if (SrcLinuxArguments->InitrdSize > 0) {
InitrdPathListPtr = (UINT8*)((UINTN)(DestLinuxArguments + 1) + SrcLinuxArguments->CmdLineSize);
CopyMem (InitrdPathListPtr, (VOID*)((UINTN)(SrcLinuxArguments + 1) + SrcLinuxArguments->CmdLineSize), SrcLinuxArguments->InitrdSize);
}
} else {
if (OptionalData != NULL) {
CopyMem (BootOption->OptionalData, OptionalData, OptionalDataSize);
}
}
BootOption->OptionalDataSize = OptionalDataSize;
// If this function is called at the creation of the Boot Device entry (not at the update) the
// BootOption->LoadOptionSize must be zero then we get a new BootIndex for this entry
if (BootOption->LoadOptionSize == 0) {
BootOption->LoadOptionIndex = BootOptionAllocateBootIndex ();
}
// Fill the EFI Load option fields
BootOption->LoadOption = EfiLoadOption;
BootOption->LoadOptionSize = EfiLoadOptionSize;
return EFI_SUCCESS;
}
EFI_STATUS
BootOptionCreate (
IN UINT32 Attributes,
IN CHAR16* BootDescription,
IN EFI_DEVICE_PATH_PROTOCOL* DevicePath,
IN ARM_BDS_LOADER_TYPE BootType,
IN UINT8* OptionalData,
IN UINTN OptionalDataSize,
OUT BDS_LOAD_OPTION** BdsLoadOption
)
{
EFI_STATUS Status;
BDS_LOAD_OPTION_ENTRY* BootOptionEntry;
BDS_LOAD_OPTION* BootOption;
CHAR16 BootVariableName[9];
UINT16* BootOrder;
UINTN BootOrderSize;
//
// Allocate and fill the memory for the BDS Load Option structure
//
BootOptionEntry = (BDS_LOAD_OPTION_ENTRY*)AllocatePool (sizeof (BDS_LOAD_OPTION_ENTRY));
InitializeListHead (&BootOptionEntry->Link);
BootOptionEntry->BdsLoadOption = (BDS_LOAD_OPTION*)AllocateZeroPool (sizeof(BDS_LOAD_OPTION));
BootOption = BootOptionEntry->BdsLoadOption;
BootOptionSetFields (BootOption, Attributes, BootDescription, DevicePath, BootType, OptionalData, OptionalDataSize);
//
// Set the related environment variables
//
// Create Boot#### environment variable
UnicodeSPrint (BootVariableName, 9 * sizeof(CHAR16), L"Boot%04X", BootOption->LoadOptionIndex);
Status = gRT->SetVariable (
BootVariableName,
&gEfiGlobalVariableGuid,
EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
BootOption->LoadOptionSize,
BootOption->LoadOption
);
// Add the new Boot Index to the list
Status = GetGlobalEnvironmentVariable (L"BootOrder", NULL, &BootOrderSize, (VOID**)&BootOrder);
if (!EFI_ERROR(Status)) {
BootOrder = ReallocatePool (BootOrderSize, BootOrderSize + sizeof(UINT16), BootOrder);
// Add the new index at the end
BootOrder[BootOrderSize / sizeof(UINT16)] = BootOption->LoadOptionIndex;
BootOrderSize += sizeof(UINT16);
} else {
// BootOrder does not exist. Create it
BootOrderSize = sizeof(UINT16);
BootOrder = &(BootOption->LoadOptionIndex);
}
// Update (or Create) the BootOrder environment variable
Status = gRT->SetVariable (
L"BootOrder",
&gEfiGlobalVariableGuid,
EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
BootOrderSize,
BootOrder
);
// We only free it if the UEFI Variable 'BootOrder' was already existing
if (BootOrderSize > sizeof(UINT16)) {
FreePool (BootOrder);
}
*BdsLoadOption = BootOption;
return Status;
}
EFI_STATUS
BootOptionUpdate (
IN BDS_LOAD_OPTION* BdsLoadOption,
IN UINT32 Attributes,
IN CHAR16* BootDescription,
IN EFI_DEVICE_PATH_PROTOCOL* DevicePath,
IN ARM_BDS_LOADER_TYPE BootType,
IN UINT8* OptionalData,
IN UINTN OptionalDataSize
)
{
EFI_STATUS Status;
CHAR16 BootVariableName[9];
// Update the BDS Load Option structure
BootOptionSetFields (BdsLoadOption, Attributes, BootDescription, DevicePath, BootType, OptionalData, OptionalDataSize);
// Update the related environment variables
UnicodeSPrint (BootVariableName, 9 * sizeof(CHAR16), L"Boot%04X", BdsLoadOption->LoadOptionIndex);
Status = gRT->SetVariable (
BootVariableName,
&gEfiGlobalVariableGuid,
EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
BdsLoadOption->LoadOptionSize,
BdsLoadOption->LoadOption
);
return Status;
}
EFI_STATUS
BootOptionDelete (
IN BDS_LOAD_OPTION *BootOption
)
{
UINTN Index;
UINTN BootOrderSize;
UINT16* BootOrder;
UINTN BootOrderCount;
CHAR16 BootVariableName[9];
EFI_STATUS Status;
// Remove the entry from the BootOrder environment variable
Status = GetGlobalEnvironmentVariable (L"BootOrder", NULL, &BootOrderSize, (VOID**)&BootOrder);
if (!EFI_ERROR(Status)) {
BootOrderCount = BootOrderSize / sizeof(UINT16);
// Find the index of the removed entry
for (Index = 0; Index < BootOrderCount; Index++) {
if (BootOrder[Index] == BootOption->LoadOptionIndex) {
// If it the last entry we do not need to rearrange the BootOrder list
if (Index + 1 != BootOrderCount) {
CopyMem (
&BootOrder[Index],
&BootOrder[Index + 1],
(BootOrderCount - (Index + 1)) * sizeof(UINT16)
);
}
break;
}
}
// Update the BootOrder environment variable
Status = gRT->SetVariable (
L"BootOrder",
&gEfiGlobalVariableGuid,
EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
BootOrderSize - sizeof(UINT16),
BootOrder
);
}
// Delete Boot#### environment variable
UnicodeSPrint (BootVariableName, 9 * sizeof(CHAR16), L"Boot%04X", BootOption->LoadOptionIndex);
Status = gRT->SetVariable (
BootVariableName,
&gEfiGlobalVariableGuid,
EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
0,
NULL
);
FreePool (BootOrder);
return Status;
}
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