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audk/MdeModulePkg/Library/UefiBootManagerLib/BmMisc.c

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/** @file
Misc library functions.
Copyright (c) 2011 - 2015, Intel Corporation. All rights reserved.<BR>
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 "InternalBm.h"
/**
Delete the instance in Multi which matches partly with Single instance
@param Multi A pointer to a multi-instance device path data
structure.
@param Single A pointer to a single-instance device path data
structure.
@return This function will remove the device path instances in Multi which partly
match with the Single, and return the result device path. If there is no
remaining device path as a result, this function will return NULL.
**/
EFI_DEVICE_PATH_PROTOCOL *
BmDelPartMatchInstance (
IN EFI_DEVICE_PATH_PROTOCOL *Multi,
IN EFI_DEVICE_PATH_PROTOCOL *Single
)
{
EFI_DEVICE_PATH_PROTOCOL *Instance;
EFI_DEVICE_PATH_PROTOCOL *NewDevicePath;
EFI_DEVICE_PATH_PROTOCOL *TempNewDevicePath;
UINTN InstanceSize;
UINTN SingleDpSize;
NewDevicePath = NULL;
TempNewDevicePath = NULL;
if (Multi == NULL || Single == NULL) {
return Multi;
}
Instance = GetNextDevicePathInstance (&Multi, &InstanceSize);
SingleDpSize = GetDevicePathSize (Single) - END_DEVICE_PATH_LENGTH;
InstanceSize -= END_DEVICE_PATH_LENGTH;
while (Instance != NULL) {
if (CompareMem (Instance, Single, MIN (SingleDpSize, InstanceSize)) != 0) {
//
// Append the device path instance which does not match with Single
//
TempNewDevicePath = NewDevicePath;
NewDevicePath = AppendDevicePathInstance (NewDevicePath, Instance);
if (TempNewDevicePath != NULL) {
FreePool(TempNewDevicePath);
}
}
FreePool(Instance);
Instance = GetNextDevicePathInstance (&Multi, &InstanceSize);
InstanceSize -= END_DEVICE_PATH_LENGTH;
}
return NewDevicePath;
}
/**
Function compares a device path data structure to that of all the nodes of a
second device path instance.
@param Multi A pointer to a multi-instance device path data
structure.
@param Single A pointer to a single-instance device path data
structure.
@retval TRUE If the Single device path is contained within Multi device path.
@retval FALSE The Single device path is not match within Multi device path.
**/
BOOLEAN
BmMatchDevicePaths (
IN EFI_DEVICE_PATH_PROTOCOL *Multi,
IN EFI_DEVICE_PATH_PROTOCOL *Single
)
{
EFI_DEVICE_PATH_PROTOCOL *DevicePath;
EFI_DEVICE_PATH_PROTOCOL *DevicePathInst;
UINTN Size;
if (Multi == NULL || Single == NULL) {
return FALSE;
}
DevicePath = Multi;
DevicePathInst = GetNextDevicePathInstance (&DevicePath, &Size);
//
// Search for the match of 'Single' in 'Multi'
//
while (DevicePathInst != NULL) {
//
// If the single device path is found in multiple device paths,
// return success
//
if (CompareMem (Single, DevicePathInst, Size) == 0) {
FreePool (DevicePathInst);
return TRUE;
}
FreePool (DevicePathInst);
DevicePathInst = GetNextDevicePathInstance (&DevicePath, &Size);
}
return FALSE;
}
/**
This routine adjust the memory information for different memory type and
save them into the variables for next boot.
**/
VOID
BmSetMemoryTypeInformationVariable (
VOID
)
{
EFI_STATUS Status;
EFI_MEMORY_TYPE_INFORMATION *PreviousMemoryTypeInformation;
EFI_MEMORY_TYPE_INFORMATION *CurrentMemoryTypeInformation;
UINTN VariableSize;
UINTN Index;
UINTN Index1;
UINT32 Previous;
UINT32 Current;
UINT32 Next;
EFI_HOB_GUID_TYPE *GuidHob;
BOOLEAN MemoryTypeInformationModified;
BOOLEAN MemoryTypeInformationVariableExists;
EFI_BOOT_MODE BootMode;
MemoryTypeInformationModified = FALSE;
MemoryTypeInformationVariableExists = FALSE;
BootMode = GetBootModeHob ();
//
// In BOOT_IN_RECOVERY_MODE, Variable region is not reliable.
//
if (BootMode == BOOT_IN_RECOVERY_MODE) {
return;
}
//
// Only check the the Memory Type Information variable in the boot mode
// other than BOOT_WITH_DEFAULT_SETTINGS because the Memory Type
// Information is not valid in this boot mode.
//
if (BootMode != BOOT_WITH_DEFAULT_SETTINGS) {
VariableSize = 0;
Status = gRT->GetVariable (
EFI_MEMORY_TYPE_INFORMATION_VARIABLE_NAME,
&gEfiMemoryTypeInformationGuid,
NULL,
&VariableSize,
NULL
);
if (Status == EFI_BUFFER_TOO_SMALL) {
MemoryTypeInformationVariableExists = TRUE;
}
}
//
// Retrieve the current memory usage statistics. If they are not found, then
// no adjustments can be made to the Memory Type Information variable.
//
Status = EfiGetSystemConfigurationTable (
&gEfiMemoryTypeInformationGuid,
(VOID **) &CurrentMemoryTypeInformation
);
if (EFI_ERROR (Status) || CurrentMemoryTypeInformation == NULL) {
return;
}
//
// Get the Memory Type Information settings from Hob if they exist,
// PEI is responsible for getting them from variable and build a Hob to save them.
// If the previous Memory Type Information is not available, then set defaults
//
GuidHob = GetFirstGuidHob (&gEfiMemoryTypeInformationGuid);
if (GuidHob == NULL) {
//
// If Platform has not built Memory Type Info into the Hob, just return.
//
return;
}
PreviousMemoryTypeInformation = GET_GUID_HOB_DATA (GuidHob);
VariableSize = GET_GUID_HOB_DATA_SIZE (GuidHob);
//
// Use a heuristic to adjust the Memory Type Information for the next boot
//
DEBUG ((EFI_D_INFO, "Memory Previous Current Next \n"));
DEBUG ((EFI_D_INFO, " Type Pages Pages Pages \n"));
DEBUG ((EFI_D_INFO, "====== ======== ======== ========\n"));
for (Index = 0; PreviousMemoryTypeInformation[Index].Type != EfiMaxMemoryType; Index++) {
for (Index1 = 0; CurrentMemoryTypeInformation[Index1].Type != EfiMaxMemoryType; Index1++) {
if (PreviousMemoryTypeInformation[Index].Type == CurrentMemoryTypeInformation[Index1].Type) {
break;
}
}
if (CurrentMemoryTypeInformation[Index1].Type == EfiMaxMemoryType) {
continue;
}
//
// Previous is the number of pages pre-allocated
// Current is the number of pages actually needed
//
Previous = PreviousMemoryTypeInformation[Index].NumberOfPages;
Current = CurrentMemoryTypeInformation[Index1].NumberOfPages;
Next = Previous;
//
// Inconsistent Memory Reserved across bootings may lead to S4 fail
// Write next varible to 125% * current when the pre-allocated memory is:
// 1. More than 150% of needed memory and boot mode is BOOT_WITH_DEFAULT_SETTING
// 2. Less than the needed memory
//
if ((Current + (Current >> 1)) < Previous) {
if (BootMode == BOOT_WITH_DEFAULT_SETTINGS) {
Next = Current + (Current >> 2);
}
} else if (Current > Previous) {
Next = Current + (Current >> 2);
}
if (Next > 0 && Next < 4) {
Next = 4;
}
if (Next != Previous) {
PreviousMemoryTypeInformation[Index].NumberOfPages = Next;
MemoryTypeInformationModified = TRUE;
}
DEBUG ((EFI_D_INFO, " %02x %08x %08x %08x\n", PreviousMemoryTypeInformation[Index].Type, Previous, Current, Next));
}
//
// If any changes were made to the Memory Type Information settings, then set the new variable value;
// Or create the variable in first boot.
//
if (MemoryTypeInformationModified || !MemoryTypeInformationVariableExists) {
Status = BmSetVariableAndReportStatusCodeOnError (
EFI_MEMORY_TYPE_INFORMATION_VARIABLE_NAME,
&gEfiMemoryTypeInformationGuid,
EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS,
VariableSize,
PreviousMemoryTypeInformation
);
if (!EFI_ERROR (Status)) {
//
// If the Memory Type Information settings have been modified, then reset the platform
// so the new Memory Type Information setting will be used to guarantee that an S4
// entry/resume cycle will not fail.
//
if (MemoryTypeInformationModified) {
DEBUG ((EFI_D_INFO, "Memory Type Information settings change. Warm Reset!!!\n"));
gRT->ResetSystem (EfiResetWarm, EFI_SUCCESS, 0, NULL);
}
} else {
DEBUG ((EFI_D_ERROR, "Memory Type Information settings cannot be saved. OS S4 may fail!\n"));
}
}
}
/**
Set the variable and report the error through status code upon failure.
@param VariableName A Null-terminated string that is the name of the vendor's variable.
Each VariableName is unique for each VendorGuid. VariableName must
contain 1 or more characters. If VariableName is an empty string,
then EFI_INVALID_PARAMETER is returned.
@param VendorGuid A unique identifier for the vendor.
@param Attributes Attributes bitmask to set for the variable.
@param DataSize The size in bytes of the Data buffer. Unless the EFI_VARIABLE_APPEND_WRITE,
EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS, or
EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS attribute is set, a size of zero
causes the variable to be deleted. When the EFI_VARIABLE_APPEND_WRITE attribute is
set, then a SetVariable() call with a DataSize of zero will not cause any change to
the variable value (the timestamp associated with the variable may be updated however
even if no new data value is provided,see the description of the
EFI_VARIABLE_AUTHENTICATION_2 descriptor below. In this case the DataSize will not
be zero since the EFI_VARIABLE_AUTHENTICATION_2 descriptor will be populated).
@param Data The contents for the variable.
@retval EFI_SUCCESS The firmware has successfully stored the variable and its data as
defined by the Attributes.
@retval EFI_INVALID_PARAMETER An invalid combination of attribute bits, name, and GUID was supplied, or the
DataSize exceeds the maximum allowed.
@retval EFI_INVALID_PARAMETER VariableName is an empty string.
@retval EFI_OUT_OF_RESOURCES Not enough storage is available to hold the variable and its data.
@retval EFI_DEVICE_ERROR The variable could not be retrieved due to a hardware error.
@retval EFI_WRITE_PROTECTED The variable in question is read-only.
@retval EFI_WRITE_PROTECTED The variable in question cannot be deleted.
@retval EFI_SECURITY_VIOLATION The variable could not be written due to EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS
or EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACESS being set, but the AuthInfo
does NOT pass the validation check carried out by the firmware.
@retval EFI_NOT_FOUND The variable trying to be updated or deleted was not found.
**/
EFI_STATUS
BmSetVariableAndReportStatusCodeOnError (
IN CHAR16 *VariableName,
IN EFI_GUID *VendorGuid,
IN UINT32 Attributes,
IN UINTN DataSize,
IN VOID *Data
)
{
EFI_STATUS Status;
EDKII_SET_VARIABLE_STATUS *SetVariableStatus;
UINTN NameSize;
Status = gRT->SetVariable (
VariableName,
VendorGuid,
Attributes,
DataSize,
Data
);
if (EFI_ERROR (Status)) {
NameSize = StrSize (VariableName);
SetVariableStatus = AllocatePool (sizeof (EDKII_SET_VARIABLE_STATUS) + NameSize + DataSize);
if (SetVariableStatus != NULL) {
CopyGuid (&SetVariableStatus->Guid, VendorGuid);
SetVariableStatus->NameSize = NameSize;
SetVariableStatus->DataSize = DataSize;
SetVariableStatus->SetStatus = Status;
SetVariableStatus->Attributes = Attributes;
CopyMem (SetVariableStatus + 1, VariableName, NameSize);
CopyMem (((UINT8 *) (SetVariableStatus + 1)) + NameSize, Data, DataSize);
REPORT_STATUS_CODE_EX (
EFI_ERROR_CODE,
PcdGet32 (PcdErrorCodeSetVariable),
0,
NULL,
&gEdkiiStatusCodeDataTypeVariableGuid,
SetVariableStatus,
sizeof (EDKII_SET_VARIABLE_STATUS) + NameSize + DataSize
);
FreePool (SetVariableStatus);
}
}
return Status;
}
/**
Print the device path info.
@param DevicePath The device path need to print.
**/
VOID
BmPrintDp (
EFI_DEVICE_PATH_PROTOCOL *DevicePath
)
{
CHAR16 *Str;
Str = ConvertDevicePathToText (DevicePath, FALSE, FALSE);
DEBUG ((EFI_D_INFO, "%s", Str));
if (Str != NULL) {
FreePool (Str);
}
}
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