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audk/EdkNt32Pkg/Dxe/PlatformBds/Generic/BootMaint/BBSsupport.c

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/*++
Copyright (c) 2006 - 2007, 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:
BBSsupport.c
Abstract:
This function deal with the legacy boot option, it create, delete
and manage the legacy boot option, all legacy boot option is getting from
the legacy BBS table.
--*/
#include "BBSsupport.h"
EFI_DEVICE_PATH_PROTOCOL EndDevicePath[] = {
END_DEVICE_PATH_TYPE,
END_ENTIRE_DEVICE_PATH_SUBTYPE,
END_DEVICE_PATH_LENGTH,
0
};
VOID
AsciiToUnicodeSize (
IN UINT8 *a,
IN UINTN Size,
OUT UINT16 *u
)
/*++
Routine Description:
Translate the first n characters of an Ascii string to
Unicode characters. The count n is indicated by parameter
Size. If Size is greater than the length of string, then
the entire string is translated.
Arguments:
a - Pointer to input Ascii string.
Size - The number of characters to translate.
u - Pointer to output Unicode string buffer.
Returns:
None
--*/
{
UINTN i;
i = 0;
while (a[i] != 0) {
u[i] = (CHAR16) a[i];
if (i == Size) {
break;
}
i++;
}
u[i] = 0;
}
VOID
BdsBuildLegacyDevNameString (
IN BBS_TABLE *CurBBSEntry,
IN UINTN Index,
IN UINTN BufSize,
OUT CHAR16 *BootString
)
{
CHAR16 *Fmt;
CHAR16 *Type;
UINT8 *StringDesc;
CHAR16 temp[80];
switch (Index) {
//
// Primary Master
//
case 1:
Fmt = L"Primary Master %s";
break;
//
// Primary Slave
//
case 2:
Fmt = L"Primary Slave %s";
break;
//
// Secondary Master
//
case 3:
Fmt = L"Secondary Master %s";
break;
//
// Secondary Slave
//
case 4:
Fmt = L"Secondary Slave %s";
break;
default:
Fmt = L"%s";
break;
}
switch (CurBBSEntry->DeviceType) {
case BBS_FLOPPY:
Type = L"Floppy";
break;
case BBS_HARDDISK:
Type = L"Harddisk";
break;
case BBS_CDROM:
Type = L"CDROM";
break;
case BBS_PCMCIA:
Type = L"PCMCIAe";
break;
case BBS_USB:
Type = L"USB";
break;
case BBS_EMBED_NETWORK:
Type = L"Network";
break;
case BBS_BEV_DEVICE:
Type = L"BEVe";
break;
case BBS_UNKNOWN:
default:
Type = L"Unknown";
break;
}
//
// If current BBS entry has its description then use it.
//
StringDesc = (UINT8 *) (UINTN) ((CurBBSEntry->DescStringSegment << 4) + CurBBSEntry->DescStringOffset);
if (NULL != StringDesc) {
//
// Only get fisrt 32 characters, this is suggested by BBS spec
//
AsciiToUnicodeSize (StringDesc, 32, temp);
Fmt = L"%s";
Type = temp;
}
UnicodeSPrint (BootString, BufSize, Fmt, Type);
}
EFI_STATUS
BdsCreateLegacyBootOption (
IN BBS_TABLE *CurrentBbsEntry,
IN EFI_DEVICE_PATH_PROTOCOL *CurrentBbsDevPath,
IN UINTN Index,
IN OUT UINT16 **BootOrderList,
IN OUT UINTN *BootOrderListSize
)
/*++
Routine Description:
Create a legacy boot option for the specified entry of
BBS table, save it as variable, and append it to the boot
order list.
Arguments:
CurrentBbsEntry - Pointer to current BBS table.
CurrentBbsDevPath - Pointer to the Device Path Protocol instance of BBS
Index - Index of the specified entry in BBS table.
BootOrderList - On input, the original boot order list.
On output, the new boot order list attached with the
created node.
BootOrderListSize - On input, the original size of boot order list.
- On output, the size of new boot order list.
Returns:
EFI_SUCCESS - Boot Option successfully created.
EFI_OUT_OF_RESOURCES - Fail to allocate necessary memory.
Other - Error occurs while setting variable.
--*/
{
EFI_STATUS Status;
UINT16 CurrentBootOptionNo;
UINT16 BootString[10];
UINT16 BootDesc[100];
UINT16 *NewBootOrderList;
UINTN BufferSize;
VOID *Buffer;
UINT8 *Ptr;
UINT16 CurrentBbsDevPathSize;
UINTN BootOrderIndex;
UINTN BootOrderLastIndex;
UINTN ArrayIndex;
BOOLEAN IndexNotFound;
if (NULL == (*BootOrderList)) {
CurrentBootOptionNo = 0;
} else {
for (ArrayIndex = 0; ArrayIndex < (UINTN) (*BootOrderListSize / sizeof (UINT16)); ArrayIndex++) {
IndexNotFound = TRUE;
for (BootOrderIndex = 0; BootOrderIndex < (UINTN) (*BootOrderListSize / sizeof (UINT16)); BootOrderIndex++) {
if ((*BootOrderList)[BootOrderIndex] == ArrayIndex) {
IndexNotFound = FALSE;
break;
}
}
if (!IndexNotFound) {
continue;
} else {
break;
}
}
CurrentBootOptionNo = (UINT16) ArrayIndex;
}
UnicodeSPrint (
BootString,
sizeof (BootString),
L"Boot%04x",
CurrentBootOptionNo
);
BdsBuildLegacyDevNameString (CurrentBbsEntry, Index, sizeof (BootDesc), BootDesc);
CurrentBbsDevPathSize = (UINT16) (GetDevicePathSize (CurrentBbsDevPath));
BufferSize = sizeof (UINT32) +
sizeof (UINT16) +
StrSize (BootDesc) +
CurrentBbsDevPathSize +
sizeof (BBS_TABLE) +
sizeof (UINT16);
Buffer = AllocateZeroPool (BufferSize);
if (Buffer == NULL) {
return EFI_OUT_OF_RESOURCES;
}
Ptr = (UINT8 *) Buffer;
*((UINT32 *) Ptr) = LOAD_OPTION_ACTIVE;
Ptr += sizeof (UINT32);
*((UINT16 *) Ptr) = CurrentBbsDevPathSize;
Ptr += sizeof (UINT16);
CopyMem (
Ptr,
BootDesc,
StrSize (BootDesc)
);
Ptr += StrSize (BootDesc);
CopyMem (
Ptr,
CurrentBbsDevPath,
CurrentBbsDevPathSize
);
Ptr += CurrentBbsDevPathSize;
CopyMem (
Ptr,
CurrentBbsEntry,
sizeof (BBS_TABLE)
);
Ptr += sizeof (BBS_TABLE);
*((UINT16 *) Ptr) = (UINT16) Index;
Status = gRT->SetVariable (
BootString,
&gEfiGlobalVariableGuid,
VAR_FLAG,
BufferSize,
Buffer
);
SafeFreePool (Buffer);
Buffer = NULL;
NewBootOrderList = AllocateZeroPool (*BootOrderListSize + sizeof (UINT16));
if (NULL == NewBootOrderList) {
return EFI_OUT_OF_RESOURCES;
}
if (NULL != *BootOrderList) {
CopyMem (NewBootOrderList, *BootOrderList, *BootOrderListSize);
}
SafeFreePool (*BootOrderList);
BootOrderLastIndex = (UINTN) (*BootOrderListSize / sizeof (UINT16));
NewBootOrderList[BootOrderLastIndex] = CurrentBootOptionNo;
*BootOrderListSize += sizeof (UINT16);
*BootOrderList = NewBootOrderList;
return Status;
}
BOOLEAN
BdsIsLegacyBootOption (
IN UINT8 *BootOptionVar,
OUT BBS_TABLE **BbsEntry,
OUT UINT16 *BbsIndex
)
{
UINT8 *Ptr;
EFI_DEVICE_PATH_PROTOCOL *DevicePath;
BOOLEAN Ret;
UINT16 DevPathLen;
Ptr = BootOptionVar;
Ptr += sizeof (UINT32);
DevPathLen = *(UINT16 *) Ptr;
Ptr += sizeof (UINT16);
Ptr += StrSize ((UINT16 *) Ptr);
DevicePath = (EFI_DEVICE_PATH_PROTOCOL *) Ptr;
if ((BBS_DEVICE_PATH == DevicePath->Type) && (BBS_BBS_DP == DevicePath->SubType)) {
Ptr += DevPathLen;
*BbsEntry = (BBS_TABLE *) Ptr;
Ptr += sizeof (BBS_TABLE);
*BbsIndex = *(UINT16 *) Ptr;
Ret = TRUE;
} else {
*BbsEntry = NULL;
Ret = FALSE;
}
return Ret;
}
EFI_STATUS
BdsDeleteBootOption (
IN UINTN OptionNumber,
IN OUT UINT16 *BootOrder,
IN OUT UINTN *BootOrderSize
)
{
UINT16 BootOption[100];
UINTN Index;
EFI_STATUS Status;
UINTN Index2Del;
Status = EFI_SUCCESS;
Index2Del = 0;
UnicodeSPrint (BootOption, sizeof (BootOption), L"Boot%04x", OptionNumber);
Status = EfiLibDeleteVariable (BootOption, &gEfiGlobalVariableGuid);
//
// adjust boot order array
//
for (Index = 0; Index < *BootOrderSize / sizeof (UINT16); Index++) {
if (BootOrder[Index] == OptionNumber) {
Index2Del = Index;
break;
}
}
if (Index != *BootOrderSize / sizeof (UINT16)) {
for (Index = 0; Index < *BootOrderSize / sizeof (UINT16) - 1; Index++) {
if (Index >= Index2Del) {
BootOrder[Index] = BootOrder[Index + 1];
}
}
*BootOrderSize -= sizeof (UINT16);
}
return Status;
}
EFI_STATUS
BdsDeleteAllInvalidLegacyBootOptions (
VOID
)
/*++
Routine Description:
Delete all the invalid legacy boot options.
Arguments:
None.
Returns:
EFI_SUCCESS - All invalide legacy boot options are deleted.
EFI_OUT_OF_RESOURCES - Fail to allocate necessary memory.
EFI_NOT_FOUND - Fail to retrive variable of boot order.
Other - Error occurs while setting variable or locating
protocol.
--*/
{
UINT16 *BootOrder;
UINT8 *BootOptionVar;
UINTN BootOrderSize;
UINTN BootOptionSize;
EFI_STATUS Status;
UINT16 HddCount;
UINT16 BbsCount;
HDD_INFO *LocalHddInfo;
BBS_TABLE *LocalBbsTable;
BBS_TABLE *BbsEntry;
UINT16 BbsIndex;
EFI_LEGACY_BIOS_PROTOCOL *LegacyBios;
UINTN Index;
UINT16 BootOption[10];
UINT16 BootDesc[100];
BOOLEAN DescStringMatch;
Status = EFI_SUCCESS;
BootOrder = NULL;
BootOrderSize = 0;
HddCount = 0;
BbsCount = 0;
LocalHddInfo = NULL;
LocalBbsTable = NULL;
BbsEntry = NULL;
Status = EfiLibLocateProtocol (&gEfiLegacyBiosProtocolGuid, &LegacyBios);
if (EFI_ERROR (Status)) {
return Status;
}
LegacyBios->GetBbsInfo (
LegacyBios,
&HddCount,
&LocalHddInfo,
&BbsCount,
&LocalBbsTable
);
BootOrder = BdsLibGetVariableAndSize (
L"BootOrder",
&gEfiGlobalVariableGuid,
&BootOrderSize
);
if (NULL == BootOrder) {
return EFI_NOT_FOUND;
}
Index = 0;
while (Index < BootOrderSize / sizeof (UINT16)) {
UnicodeSPrint (BootOption, sizeof (BootOption), L"Boot%04x", BootOrder[Index]);
BootOptionVar = BdsLibGetVariableAndSize (
BootOption,
&gEfiGlobalVariableGuid,
&BootOptionSize
);
if (NULL == BootOptionVar) {
SafeFreePool (BootOrder);
return EFI_OUT_OF_RESOURCES;
}
if (!BdsIsLegacyBootOption (BootOptionVar, &BbsEntry, &BbsIndex)) {
SafeFreePool (BootOptionVar);
Index++;
continue;
}
//
// Check if BBS Description String is changed
//
DescStringMatch = FALSE;
BdsBuildLegacyDevNameString (
&LocalBbsTable[BbsIndex],
BbsIndex,
sizeof(BootDesc),
BootDesc
);
if (StrCmp (BootDesc, (UINT16*)(BootOptionVar + sizeof (UINT32) + sizeof (UINT16))) == 0) {
DescStringMatch = TRUE;
}
if (!((LocalBbsTable[BbsIndex].BootPriority == BBS_IGNORE_ENTRY) ||
(LocalBbsTable[BbsIndex].BootPriority == BBS_DO_NOT_BOOT_FROM) ||
(LocalBbsTable[BbsIndex].BootPriority == BBS_LOWEST_PRIORITY)) &&
(LocalBbsTable[BbsIndex].DeviceType == BbsEntry->DeviceType) &&
DescStringMatch) {
Index++;
continue;
}
SafeFreePool (BootOptionVar);
//
// should delete
//
BdsDeleteBootOption (
BootOrder[Index],
BootOrder,
&BootOrderSize
);
}
if (BootOrderSize) {
Status = gRT->SetVariable (
L"BootOrder",
&gEfiGlobalVariableGuid,
VAR_FLAG,
BootOrderSize,
BootOrder
);
} else {
EfiLibDeleteVariable (L"BootOrder", &gEfiGlobalVariableGuid);
}
SafeFreePool (BootOrder);
return Status;
}
BOOLEAN
BdsFindLegacyBootOptionByDevType (
IN UINT16 *BootOrder,
IN UINTN BootOptionNum,
IN UINT16 DevType,
OUT UINT32 *Attribute,
OUT UINT16 *BbsIndex,
OUT UINTN *OptionNumber
)
{
UINTN Index;
UINTN BootOrderIndex;
UINT16 BootOption[100];
UINTN BootOptionSize;
UINT8 *BootOptionVar;
BBS_TABLE *BbsEntry;
BOOLEAN Found;
BbsEntry = NULL;
Found = FALSE;
if (NULL == BootOrder) {
return Found;
}
for (BootOrderIndex = 0; BootOrderIndex < BootOptionNum; BootOrderIndex++) {
Index = (UINTN) BootOrder[BootOrderIndex];
UnicodeSPrint (BootOption, sizeof (BootOption), L"Boot%04x", Index);
BootOptionVar = BdsLibGetVariableAndSize (
BootOption,
&gEfiGlobalVariableGuid,
&BootOptionSize
);
if (NULL == BootOptionVar) {
continue;
}
if (!BdsIsLegacyBootOption (BootOptionVar, &BbsEntry, BbsIndex)) {
SafeFreePool (BootOptionVar);
continue;
}
if (BbsEntry->DeviceType != DevType) {
SafeFreePool (BootOptionVar);
continue;
}
*Attribute = *(UINT32 *) BootOptionVar;
*OptionNumber = Index;
Found = TRUE;
SafeFreePool (BootOptionVar);
break;
}
return Found;
}
EFI_STATUS
BdsCreateOneLegacyBootOption (
IN BBS_TABLE *BbsItem,
IN UINTN Index,
IN OUT UINT16 **BootOrderList,
IN OUT UINTN *BootOrderListSize
)
{
BBS_BBS_DEVICE_PATH BbsDevPathNode;
EFI_STATUS Status;
EFI_DEVICE_PATH_PROTOCOL *DevPath;
DevPath = NULL;
BbsDevPathNode.Header.Type = BBS_DEVICE_PATH;
BbsDevPathNode.Header.SubType = BBS_BBS_DP;
SetDevicePathNodeLength (&BbsDevPathNode.Header, sizeof (BBS_BBS_DEVICE_PATH));
BbsDevPathNode.DeviceType = BbsItem->DeviceType;
CopyMem (&BbsDevPathNode.StatusFlag, &BbsItem->StatusFlags, sizeof (UINT16));
DevPath = AppendDevicePathNode (
EndDevicePath,
(EFI_DEVICE_PATH_PROTOCOL *) &BbsDevPathNode
);
if (NULL == DevPath) {
return EFI_OUT_OF_RESOURCES;
}
Status = BdsCreateLegacyBootOption (
BbsItem,
DevPath,
Index,
BootOrderList,
BootOrderListSize
);
BbsItem->BootPriority = 0x00;
FreePool (DevPath);
return Status;
}
EFI_STATUS
BdsAddNonExistingLegacyBootOptions (
VOID
)
/*++
Routine Description:
Add the legacy boot options from BBS table if they do not exist.
Arguments:
None.
Returns:
EFI_SUCCESS - The boot options are added successfully or they are already in boot options.
others - An error occurred when creating legacy boot options.
--*/
{
UINT16 *BootOrder;
UINTN BootOrderSize;
EFI_STATUS Status;
UINT16 HddCount;
UINT16 BbsCount;
HDD_INFO *LocalHddInfo;
BBS_TABLE *LocalBbsTable;
UINT16 BbsIndex;
EFI_LEGACY_BIOS_PROTOCOL *LegacyBios;
UINTN Index;
UINT32 Attribute;
UINTN OptionNumber;
BOOLEAN Ret;
BootOrder = NULL;
HddCount = 0;
BbsCount = 0;
LocalHddInfo = NULL;
LocalBbsTable = NULL;
Status = EfiLibLocateProtocol (&gEfiLegacyBiosProtocolGuid, &LegacyBios);
if (EFI_ERROR (Status)) {
return Status;
}
LegacyBios->GetBbsInfo (
LegacyBios,
&HddCount,
&LocalHddInfo,
&BbsCount,
&LocalBbsTable
);
BootOrder = BdsLibGetVariableAndSize (
L"BootOrder",
&gEfiGlobalVariableGuid,
&BootOrderSize
);
if (NULL == BootOrder) {
BootOrderSize = 0;
}
for (Index = 0; Index < BbsCount; Index++) {
if ((LocalBbsTable[Index].BootPriority == BBS_IGNORE_ENTRY) ||
(LocalBbsTable[Index].BootPriority == BBS_DO_NOT_BOOT_FROM)
) {
continue;
}
Ret = BdsFindLegacyBootOptionByDevType (
BootOrder,
BootOrderSize / sizeof (UINT16),
LocalBbsTable[Index].DeviceType,
&Attribute,
&BbsIndex,
&OptionNumber
);
if (Ret && (Attribute & LOAD_OPTION_ACTIVE) != 0) {
continue;
}
if (Ret) {
if (Index != BbsIndex) {
BdsDeleteBootOption (
OptionNumber,
BootOrder,
&BootOrderSize
);
} else {
continue;
}
}
//
// Not found such type of legacy device in boot options or we found but it's disabled
// so we have to create one and put it to the tail of boot order list
//
Status = BdsCreateOneLegacyBootOption (
&LocalBbsTable[Index],
Index,
&BootOrder,
&BootOrderSize
);
if (EFI_ERROR (Status)) {
break;
}
}
if (BootOrderSize > 0) {
Status = gRT->SetVariable (
L"BootOrder",
&gEfiGlobalVariableGuid,
VAR_FLAG,
BootOrderSize,
BootOrder
);
} else {
EfiLibDeleteVariable (L"BootOrder", &gEfiGlobalVariableGuid);
}
if (BootOrder != NULL) {
SafeFreePool (BootOrder);
}
return Status;
}
UINT16 *
BdsFillDevOrderBuf (
IN BBS_TABLE *BbsTable,
IN BBS_TYPE BbsType,
IN UINTN BbsCount,
IN UINT16 *Buf
)
{
UINTN Index;
for (Index = 0; Index < BbsCount; Index++) {
if (BbsTable[Index].BootPriority == BBS_IGNORE_ENTRY) {
continue;
}
if (BbsTable[Index].DeviceType != BbsType) {
continue;
}
*Buf = (UINT16) (Index & 0xFF);
Buf++;
}
return Buf;
}
EFI_STATUS
BdsCreateDevOrder (
IN BBS_TABLE *BbsTable,
IN UINT16 BbsCount
)
{
UINTN Index;
UINTN FDCount;
UINTN HDCount;
UINTN CDCount;
UINTN NETCount;
UINTN BEVCount;
UINTN TotalSize;
UINTN HeaderSize;
UINT8 *DevOrder;
UINT8 *Ptr;
EFI_STATUS Status;
FDCount = 0;
HDCount = 0;
CDCount = 0;
NETCount = 0;
BEVCount = 0;
TotalSize = 0;
HeaderSize = sizeof (BBS_TYPE) + sizeof (UINT16);
DevOrder = NULL;
Ptr = NULL;
Status = EFI_SUCCESS;
for (Index = 0; Index < BbsCount; Index++) {
if (BbsTable[Index].BootPriority == BBS_IGNORE_ENTRY) {
continue;
}
switch (BbsTable[Index].DeviceType) {
case BBS_FLOPPY:
FDCount++;
break;
case BBS_HARDDISK:
HDCount++;
break;
case BBS_CDROM:
CDCount++;
break;
case BBS_EMBED_NETWORK:
NETCount++;
break;
case BBS_BEV_DEVICE:
BEVCount++;
break;
default:
break;
}
}
TotalSize += (HeaderSize + sizeof (UINT16) * FDCount);
TotalSize += (HeaderSize + sizeof (UINT16) * HDCount);
TotalSize += (HeaderSize + sizeof (UINT16) * CDCount);
TotalSize += (HeaderSize + sizeof (UINT16) * NETCount);
TotalSize += (HeaderSize + sizeof (UINT16) * BEVCount);
DevOrder = AllocateZeroPool (TotalSize);
if (NULL == DevOrder) {
return EFI_OUT_OF_RESOURCES;
}
Ptr = DevOrder;
*((BBS_TYPE *) Ptr) = BBS_FLOPPY;
Ptr += sizeof (BBS_TYPE);
*((UINT16 *) Ptr) = (UINT16) (sizeof (UINT16) + FDCount * sizeof (UINT16));
Ptr += sizeof (UINT16);
if (FDCount) {
Ptr = (UINT8 *) BdsFillDevOrderBuf (BbsTable, BBS_FLOPPY, BbsCount, (UINT16 *) Ptr);
}
*((BBS_TYPE *) Ptr) = BBS_HARDDISK;
Ptr += sizeof (BBS_TYPE);
*((UINT16 *) Ptr) = (UINT16) (sizeof (UINT16) + HDCount * sizeof (UINT16));
Ptr += sizeof (UINT16);
if (HDCount) {
Ptr = (UINT8 *) BdsFillDevOrderBuf (BbsTable, BBS_HARDDISK, BbsCount, (UINT16 *) Ptr);
}
*((BBS_TYPE *) Ptr) = BBS_CDROM;
Ptr += sizeof (BBS_TYPE);
*((UINT16 *) Ptr) = (UINT16) (sizeof (UINT16) + CDCount * sizeof (UINT16));
Ptr += sizeof (UINT16);
if (CDCount) {
Ptr = (UINT8 *) BdsFillDevOrderBuf (BbsTable, BBS_CDROM, BbsCount, (UINT16 *) Ptr);
}
*((BBS_TYPE *) Ptr) = BBS_EMBED_NETWORK;
Ptr += sizeof (BBS_TYPE);
*((UINT16 *) Ptr) = (UINT16) (sizeof (UINT16) + NETCount * sizeof (UINT16));
Ptr += sizeof (UINT16);
if (NETCount) {
Ptr = (UINT8 *) BdsFillDevOrderBuf (BbsTable, BBS_EMBED_NETWORK, BbsCount, (UINT16 *) Ptr);
}
*((BBS_TYPE *) Ptr) = BBS_BEV_DEVICE;
Ptr += sizeof (BBS_TYPE);
*((UINT16 *) Ptr) = (UINT16) (sizeof (UINT16) + BEVCount * sizeof (UINT16));
Ptr += sizeof (UINT16);
if (BEVCount) {
Ptr = (UINT8 *) BdsFillDevOrderBuf (BbsTable, BBS_BEV_DEVICE, BbsCount, (UINT16 *) Ptr);
}
Status = gRT->SetVariable (
VarLegacyDevOrder,
&EfiLegacyDevOrderGuid,
VAR_FLAG,
TotalSize,
DevOrder
);
SafeFreePool (DevOrder);
return Status;
}
EFI_STATUS
BdsUpdateLegacyDevOrder (
VOID
)
/*++
Format of LegacyDevOrder variable:
|-----------------------------------------------------------------------------------------------------------------
| BBS_FLOPPY | Length | Index0 | Index1 | ... | BBS_HARDDISK | Length | Index0 | Index1 | ... | BBS_CDROM | Length | Index0 | ...
|-----------------------------------------------------------------------------------------------------------------
Length is a 16 bit integer, it indicates how many Indexes follows, including the size of itself.
Index# is a 16 bit integer, the low byte of it stands for the index in BBS table
the high byte of it only have two value 0 and 0xFF, 0xFF means this device has been
disabled by user.
--*/
{
UINT8 *DevOrder;
UINT8 *NewDevOrder;
UINTN DevOrderSize;
EFI_LEGACY_BIOS_PROTOCOL *LegacyBios;
EFI_STATUS Status;
UINT16 HddCount;
UINT16 BbsCount;
HDD_INFO *LocalHddInfo;
BBS_TABLE *LocalBbsTable;
UINTN Index;
UINTN Index2;
UINTN *Idx;
UINTN FDCount;
UINTN HDCount;
UINTN CDCount;
UINTN NETCount;
UINTN BEVCount;
UINTN TotalSize;
UINTN HeaderSize;
UINT8 *Ptr;
UINT8 *NewPtr;
UINT16 *NewFDPtr;
UINT16 *NewHDPtr;
UINT16 *NewCDPtr;
UINT16 *NewNETPtr;
UINT16 *NewBEVPtr;
UINT16 *NewDevPtr;
UINT16 Length;
UINT16 tmp;
UINTN FDIndex;
UINTN HDIndex;
UINTN CDIndex;
UINTN NETIndex;
UINTN BEVIndex;
LocalHddInfo = NULL;
LocalBbsTable = NULL;
Idx = NULL;
FDCount = 0;
HDCount = 0;
CDCount = 0;
NETCount = 0;
BEVCount = 0;
TotalSize = 0;
HeaderSize = sizeof (BBS_TYPE) + sizeof (UINT16);
FDIndex = 0;
HDIndex = 0;
CDIndex = 0;
NETIndex = 0;
BEVIndex = 0;
NewDevPtr = NULL;
Status = EfiLibLocateProtocol (&gEfiLegacyBiosProtocolGuid, &LegacyBios);
if (EFI_ERROR (Status)) {
return Status;
}
LegacyBios->GetBbsInfo (
LegacyBios,
&HddCount,
&LocalHddInfo,
&BbsCount,
&LocalBbsTable
);
DevOrder = (UINT8 *) BdsLibGetVariableAndSize (
VarLegacyDevOrder,
&EfiLegacyDevOrderGuid,
&DevOrderSize
);
if (NULL == DevOrder) {
return BdsCreateDevOrder (LocalBbsTable, BbsCount);
}
//
// First we figure out how many boot devices with same device type respectively
//
for (Index = 0; Index < BbsCount; Index++) {
if ((LocalBbsTable[Index].BootPriority == BBS_IGNORE_ENTRY) ||
(LocalBbsTable[Index].BootPriority == BBS_DO_NOT_BOOT_FROM) ||
(LocalBbsTable[Index].BootPriority == BBS_LOWEST_PRIORITY)
) {
continue;
}
switch (LocalBbsTable[Index].DeviceType) {
case BBS_FLOPPY:
FDCount++;
break;
case BBS_HARDDISK:
HDCount++;
break;
case BBS_CDROM:
CDCount++;
break;
case BBS_EMBED_NETWORK:
NETCount++;
break;
case BBS_BEV_DEVICE:
BEVCount++;
break;
default:
break;
}
}
TotalSize += (HeaderSize + FDCount * sizeof (UINT16));
TotalSize += (HeaderSize + HDCount * sizeof (UINT16));
TotalSize += (HeaderSize + CDCount * sizeof (UINT16));
TotalSize += (HeaderSize + NETCount * sizeof (UINT16));
TotalSize += (HeaderSize + BEVCount * sizeof (UINT16));
NewDevOrder = AllocateZeroPool (TotalSize);
if (NULL == NewDevOrder) {
return EFI_OUT_OF_RESOURCES;
}
NewFDPtr = (UINT16 *) (NewDevOrder + HeaderSize);
NewHDPtr = (UINT16 *) ((UINT8 *) NewFDPtr + FDCount * sizeof (UINT16) + HeaderSize);
NewCDPtr = (UINT16 *) ((UINT8 *) NewHDPtr + HDCount * sizeof (UINT16) + HeaderSize);
NewNETPtr = (UINT16 *) ((UINT8 *) NewCDPtr + CDCount * sizeof (UINT16) + HeaderSize);
NewBEVPtr = (UINT16 *) ((UINT8 *) NewNETPtr + NETCount * sizeof (UINT16) + HeaderSize);
//
// copy FD
//
Ptr = DevOrder;
NewPtr = NewDevOrder;
*((BBS_TYPE *) NewPtr) = *((BBS_TYPE *) Ptr);
Ptr += sizeof (BBS_TYPE);
NewPtr += sizeof (BBS_TYPE);
Length = *((UINT16 *) Ptr);
*((UINT16 *) NewPtr) = (UINT16) (sizeof (UINT16) + FDCount * sizeof (UINT16));
Ptr += sizeof (UINT16);
for (Index = 0; Index < Length / sizeof (UINT16) - 1; Index++) {
if (LocalBbsTable[*Ptr].BootPriority == BBS_IGNORE_ENTRY ||
LocalBbsTable[*Ptr].BootPriority == BBS_DO_NOT_BOOT_FROM ||
LocalBbsTable[*Ptr].BootPriority == BBS_LOWEST_PRIORITY ||
LocalBbsTable[*Ptr].DeviceType != BBS_FLOPPY
) {
Ptr += sizeof (UINT16);
continue;
}
NewFDPtr[FDIndex] = *(UINT16 *) Ptr;
FDIndex++;
Ptr += sizeof (UINT16);
}
//
// copy HD
//
NewPtr = (UINT8 *) NewHDPtr - HeaderSize;
*((BBS_TYPE *) NewPtr) = *((BBS_TYPE *) Ptr);
Ptr += sizeof (BBS_TYPE);
NewPtr += sizeof (BBS_TYPE);
Length = *((UINT16 *) Ptr);
*((UINT16 *) NewPtr) = (UINT16) (sizeof (UINT16) + HDCount * sizeof (UINT16));
Ptr += sizeof (UINT16);
for (Index = 0; Index < Length / sizeof (UINT16) - 1; Index++) {
if (LocalBbsTable[*Ptr].BootPriority == BBS_IGNORE_ENTRY ||
LocalBbsTable[*Ptr].BootPriority == BBS_DO_NOT_BOOT_FROM ||
LocalBbsTable[*Ptr].BootPriority == BBS_LOWEST_PRIORITY ||
LocalBbsTable[*Ptr].DeviceType != BBS_HARDDISK
) {
Ptr += sizeof (UINT16);
continue;
}
NewHDPtr[HDIndex] = *(UINT16 *) Ptr;
HDIndex++;
Ptr += sizeof (UINT16);
}
//
// copy CD
//
NewPtr = (UINT8 *) NewCDPtr - HeaderSize;
*((BBS_TYPE *) NewPtr) = *((BBS_TYPE *) Ptr);
Ptr += sizeof (BBS_TYPE);
NewPtr += sizeof (BBS_TYPE);
Length = *((UINT16 *) Ptr);
*((UINT16 *) NewPtr) = (UINT16) (sizeof (UINT16) + CDCount * sizeof (UINT16));
Ptr += sizeof (UINT16);
for (Index = 0; Index < Length / sizeof (UINT16) - 1; Index++) {
if (LocalBbsTable[*Ptr].BootPriority == BBS_IGNORE_ENTRY ||
LocalBbsTable[*Ptr].BootPriority == BBS_DO_NOT_BOOT_FROM ||
LocalBbsTable[*Ptr].BootPriority == BBS_LOWEST_PRIORITY ||
LocalBbsTable[*Ptr].DeviceType != BBS_CDROM
) {
Ptr += sizeof (UINT16);
continue;
}
NewCDPtr[CDIndex] = *(UINT16 *) Ptr;
CDIndex++;
Ptr += sizeof (UINT16);
}
//
// copy NET
//
NewPtr = (UINT8 *) NewNETPtr - HeaderSize;
*((BBS_TYPE *) NewPtr) = *((BBS_TYPE *) Ptr);
Ptr += sizeof (BBS_TYPE);
NewPtr += sizeof (BBS_TYPE);
Length = *((UINT16 *) Ptr);
*((UINT16 *) NewPtr) = (UINT16) (sizeof (UINT16) + NETCount * sizeof (UINT16));
Ptr += sizeof (UINT16);
for (Index = 0; Index < Length / sizeof (UINT16) - 1; Index++) {
if (LocalBbsTable[*Ptr].BootPriority == BBS_IGNORE_ENTRY ||
LocalBbsTable[*Ptr].BootPriority == BBS_DO_NOT_BOOT_FROM ||
LocalBbsTable[*Ptr].BootPriority == BBS_LOWEST_PRIORITY ||
LocalBbsTable[*Ptr].DeviceType != BBS_EMBED_NETWORK
) {
Ptr += sizeof (UINT16);
continue;
}
NewNETPtr[NETIndex] = *(UINT16 *) Ptr;
NETIndex++;
Ptr += sizeof (UINT16);
}
//
// copy BEV
//
NewPtr = (UINT8 *) NewBEVPtr - HeaderSize;
*((BBS_TYPE *) NewPtr) = *((BBS_TYPE *) Ptr);
Ptr += sizeof (BBS_TYPE);
NewPtr += sizeof (BBS_TYPE);
Length = *((UINT16 *) Ptr);
*((UINT16 *) NewPtr) = (UINT16) (sizeof (UINT16) + BEVCount * sizeof (UINT16));
Ptr += sizeof (UINT16);
for (Index = 0; Index < Length / sizeof (UINT16) - 1; Index++) {
if (LocalBbsTable[*Ptr].BootPriority == BBS_IGNORE_ENTRY ||
LocalBbsTable[*Ptr].BootPriority == BBS_DO_NOT_BOOT_FROM ||
LocalBbsTable[*Ptr].BootPriority == BBS_LOWEST_PRIORITY ||
LocalBbsTable[*Ptr].DeviceType != BBS_BEV_DEVICE
) {
Ptr += sizeof (UINT16);
continue;
}
NewBEVPtr[BEVIndex] = *(UINT16 *) Ptr;
BEVIndex++;
Ptr += sizeof (UINT16);
}
for (Index = 0; Index < BbsCount; Index++) {
if ((LocalBbsTable[Index].BootPriority == BBS_IGNORE_ENTRY) ||
(LocalBbsTable[Index].BootPriority == BBS_DO_NOT_BOOT_FROM) ||
(LocalBbsTable[Index].BootPriority == BBS_LOWEST_PRIORITY)
) {
continue;
}
switch (LocalBbsTable[Index].DeviceType) {
case BBS_FLOPPY:
Idx = &FDIndex;
NewDevPtr = NewFDPtr;
break;
case BBS_HARDDISK:
Idx = &HDIndex;
NewDevPtr = NewHDPtr;
break;
case BBS_CDROM:
Idx = &CDIndex;
NewDevPtr = NewCDPtr;
break;
case BBS_EMBED_NETWORK:
Idx = &NETIndex;
NewDevPtr = NewNETPtr;
break;
case BBS_BEV_DEVICE:
Idx = &BEVIndex;
NewDevPtr = NewBEVPtr;
break;
default:
Idx = NULL;
break;
}
//
// at this point we have copied those valid indexes to new buffer
// and we should check if there is any new appeared boot device
//
if (Idx) {
for (Index2 = 0; Index2 < *Idx; Index2++) {
if ((NewDevPtr[Index2] & 0xFF) == (UINT16) Index) {
break;
}
}
if (Index2 == *Idx) {
//
// Index2 == *Idx means we didn't find Index
// so Index is a new appeared device's index in BBS table
// save it.
//
NewDevPtr[*Idx] = (UINT16) (Index & 0xFF);
(*Idx)++;
}
}
}
if (FDCount) {
//
// Just to make sure that disabled indexes are all at the end of the array
//
for (Index = 0; Index < FDIndex - 1; Index++) {
if (0xFF00 != (NewFDPtr[Index] & 0xFF00)) {
continue;
}
for (Index2 = Index + 1; Index2 < FDIndex; Index2++) {
if (0 == (NewFDPtr[Index2] & 0xFF00)) {
tmp = NewFDPtr[Index];
NewFDPtr[Index] = NewFDPtr[Index2];
NewFDPtr[Index2] = tmp;
break;
}
}
}
}
if (HDCount) {
//
// Just to make sure that disabled indexes are all at the end of the array
//
for (Index = 0; Index < HDIndex - 1; Index++) {
if (0xFF00 != (NewHDPtr[Index] & 0xFF00)) {
continue;
}
for (Index2 = Index + 1; Index2 < HDIndex; Index2++) {
if (0 == (NewHDPtr[Index2] & 0xFF00)) {
tmp = NewHDPtr[Index];
NewHDPtr[Index] = NewHDPtr[Index2];
NewHDPtr[Index2] = tmp;
break;
}
}
}
}
if (CDCount) {
//
// Just to make sure that disabled indexes are all at the end of the array
//
for (Index = 0; Index < CDIndex - 1; Index++) {
if (0xFF00 != (NewCDPtr[Index] & 0xFF00)) {
continue;
}
for (Index2 = Index + 1; Index2 < CDIndex; Index2++) {
if (0 == (NewCDPtr[Index2] & 0xFF00)) {
tmp = NewCDPtr[Index];
NewCDPtr[Index] = NewCDPtr[Index2];
NewCDPtr[Index2] = tmp;
break;
}
}
}
}
if (NETCount) {
//
// Just to make sure that disabled indexes are all at the end of the array
//
for (Index = 0; Index < NETIndex - 1; Index++) {
if (0xFF00 != (NewNETPtr[Index] & 0xFF00)) {
continue;
}
for (Index2 = Index + 1; Index2 < NETIndex; Index2++) {
if (0 == (NewNETPtr[Index2] & 0xFF00)) {
tmp = NewNETPtr[Index];
NewNETPtr[Index] = NewNETPtr[Index2];
NewNETPtr[Index2] = tmp;
break;
}
}
}
}
if (BEVCount) {
//
// Just to make sure that disabled indexes are all at the end of the array
//
for (Index = 0; Index < BEVIndex - 1; Index++) {
if (0xFF00 != (NewBEVPtr[Index] & 0xFF00)) {
continue;
}
for (Index2 = Index + 1; Index2 < BEVIndex; Index2++) {
if (0 == (NewBEVPtr[Index2] & 0xFF00)) {
tmp = NewBEVPtr[Index];
NewBEVPtr[Index] = NewBEVPtr[Index2];
NewBEVPtr[Index2] = tmp;
break;
}
}
}
}
SafeFreePool (DevOrder);
Status = gRT->SetVariable (
VarLegacyDevOrder,
&EfiLegacyDevOrderGuid,
VAR_FLAG,
TotalSize,
NewDevOrder
);
SafeFreePool (NewDevOrder);
return Status;
}
EFI_STATUS
BdsSetBootPriority4SameTypeDev (
IN UINT16 DeviceType,
IN OUT BBS_TABLE *LocalBbsTable,
IN OUT UINT16 *Priority
)
/*++
DeviceType - BBS_FLOPPY, BBS_HARDDISK, BBS_CDROM and so on
LocalBbsTable - BBS table instance
Priority - As input arg, it is the start point of boot priority, as output arg, it is the start point of boot
priority can be used next time.
--*/
{
UINT8 *DevOrder;
UINT8 *OrigBuffer;
UINT16 *DevIndex;
UINTN DevOrderSize;
UINTN DevCount;
UINTN Index;
DevOrder = BdsLibGetVariableAndSize (
VarLegacyDevOrder,
&EfiLegacyDevOrderGuid,
&DevOrderSize
);
if (NULL == DevOrder) {
return EFI_OUT_OF_RESOURCES;
}
OrigBuffer = DevOrder;
while (DevOrder < OrigBuffer + DevOrderSize) {
if (DeviceType == * (BBS_TYPE *) DevOrder) {
break;
}
DevOrder += sizeof (BBS_TYPE);
DevOrder += *(UINT16 *) DevOrder;
}
if (DevOrder >= OrigBuffer + DevOrderSize) {
SafeFreePool (OrigBuffer);
return EFI_NOT_FOUND;
}
DevOrder += sizeof (BBS_TYPE);
DevCount = (*((UINT16 *) DevOrder) - sizeof (UINT16)) / sizeof (UINT16);
DevIndex = (UINT16 *) (DevOrder + sizeof (UINT16));
//
// If the high byte of the DevIndex is 0xFF, it indicates that this device has been disabled.
//
for (Index = 0; Index < DevCount; Index++) {
if ((DevIndex[Index] & 0xFF00) == 0xFF00) {
//
// LocalBbsTable[DevIndex[Index] & 0xFF].BootPriority = BBS_DISABLED_ENTRY;
//
} else {
LocalBbsTable[DevIndex[Index] & 0xFF].BootPriority = *Priority;
(*Priority)++;
}
}
SafeFreePool (OrigBuffer);
return EFI_SUCCESS;
}
VOID
PrintBbsTable (
IN BBS_TABLE *LocalBbsTable
)
{
UINT16 Idx;
DEBUG ((EFI_D_ERROR, "\n"));
DEBUG ((EFI_D_ERROR, " NO Prio bb/dd/ff cl/sc Type Stat segm:offs\n"));
DEBUG ((EFI_D_ERROR, "=============================================\n"));
for (Idx = 0; Idx < MAX_BBS_ENTRIES; Idx++) {
if ((LocalBbsTable[Idx].BootPriority == BBS_IGNORE_ENTRY) ||
(LocalBbsTable[Idx].BootPriority == BBS_DO_NOT_BOOT_FROM) ||
(LocalBbsTable[Idx].BootPriority == BBS_LOWEST_PRIORITY)
) {
continue;
}
DEBUG (
(EFI_D_ERROR,
" %02x: %04x %02x/%02x/%02x %02x/02%x %04x %04x %04x:%04x\n",
(UINTN) Idx,
(UINTN) LocalBbsTable[Idx].BootPriority,
(UINTN) LocalBbsTable[Idx].Bus,
(UINTN) LocalBbsTable[Idx].Device,
(UINTN) LocalBbsTable[Idx].Function,
(UINTN) LocalBbsTable[Idx].Class,
(UINTN) LocalBbsTable[Idx].SubClass,
(UINTN) LocalBbsTable[Idx].DeviceType,
(UINTN) * (UINT16 *) &LocalBbsTable[Idx].StatusFlags,
(UINTN) LocalBbsTable[Idx].BootHandlerSegment,
(UINTN) LocalBbsTable[Idx].BootHandlerOffset,
(UINTN) ((LocalBbsTable[Idx].MfgStringSegment << 4) + LocalBbsTable[Idx].MfgStringOffset),
(UINTN) ((LocalBbsTable[Idx].DescStringSegment << 4) + LocalBbsTable[Idx].DescStringOffset))
);
}
DEBUG ((EFI_D_ERROR, "\n"));
}
EFI_STATUS
BdsRefreshBbsTableForBoot (
IN BDS_COMMON_OPTION *Entry
)
{
EFI_STATUS Status;
UINT16 HddCount;
UINT16 BbsCount;
HDD_INFO *LocalHddInfo;
BBS_TABLE *LocalBbsTable;
UINT16 DevType;
EFI_LEGACY_BIOS_PROTOCOL *LegacyBios;
UINTN Index;
UINT16 Priority;
UINT16 *BootOrder;
UINTN BootOrderSize;
UINT8 *BootOptionVar;
UINTN BootOptionSize;
UINT16 BootOption[100];
UINT8 *Ptr;
UINT16 DevPathLen;
EFI_DEVICE_PATH_PROTOCOL *DevPath;
HddCount = 0;
BbsCount = 0;
LocalHddInfo = NULL;
LocalBbsTable = NULL;
DevType = BBS_UNKNOWN;
Status = EfiLibLocateProtocol (&gEfiLegacyBiosProtocolGuid, &LegacyBios);
if (EFI_ERROR (Status)) {
return Status;
}
LegacyBios->GetBbsInfo (
LegacyBios,
&HddCount,
&LocalHddInfo,
&BbsCount,
&LocalBbsTable
);
//
// First, set all the present devices' boot priority to BBS_UNPRIORITIZED_ENTRY
// We will set them according to the settings setup by user
//
for (Index = 0; Index < BbsCount; Index++) {
if (!((BBS_IGNORE_ENTRY == LocalBbsTable[Index].BootPriority) ||
(BBS_DO_NOT_BOOT_FROM == LocalBbsTable[Index].BootPriority) ||
(BBS_LOWEST_PRIORITY == LocalBbsTable[Index].BootPriority))) {
LocalBbsTable[Index].BootPriority = BBS_UNPRIORITIZED_ENTRY;
}
}
//
// boot priority always starts at 0
//
Priority = 0;
if (Entry->LoadOptionsSize == sizeof (BBS_TABLE) + sizeof (UINT16)) {
//
// If Entry stands for a legacy boot option, we prioritize the devices with the same type first.
//
DevType = ((BBS_TABLE *) Entry->LoadOptions)->DeviceType;
Status = BdsSetBootPriority4SameTypeDev (
DevType,
LocalBbsTable,
&Priority
);
if (EFI_ERROR (Status)) {
return Status;
}
}
//
// we have to set the boot priority for other BBS entries with different device types
//
BootOrder = (UINT16 *) BdsLibGetVariableAndSize (
L"BootOrder",
&gEfiGlobalVariableGuid,
&BootOrderSize
);
for (Index = 0; BootOrder && Index < BootOrderSize / sizeof (UINT16); Index++) {
UnicodeSPrint (BootOption, sizeof (BootOption), L"Boot%04x", BootOrder[Index]);
BootOptionVar = BdsLibGetVariableAndSize (
BootOption,
&gEfiGlobalVariableGuid,
&BootOptionSize
);
if (NULL == BootOptionVar) {
continue;
}
Ptr = BootOptionVar;
Ptr += sizeof (UINT32);
DevPathLen = *(UINT16 *) Ptr;
Ptr += sizeof (UINT16);
Ptr += StrSize ((UINT16 *) Ptr);
DevPath = (EFI_DEVICE_PATH_PROTOCOL *) Ptr;
if (BBS_DEVICE_PATH != DevPath->Type || BBS_BBS_DP != DevPath->SubType) {
SafeFreePool (BootOptionVar);
continue;
}
Ptr += DevPathLen;
if (DevType == ((BBS_TABLE *) Ptr)->DeviceType) {
//
// We don't want to process twice for a device type
//
SafeFreePool (BootOptionVar);
continue;
}
Status = BdsSetBootPriority4SameTypeDev (
((BBS_TABLE *) Ptr)->DeviceType,
LocalBbsTable,
&Priority
);
SafeFreePool (BootOptionVar);
if (EFI_ERROR (Status)) {
break;
}
}
if (BootOrder) {
SafeFreePool (BootOrder);
}
//
// For debug
//
PrintBbsTable (LocalBbsTable);
return Status;
}
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