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16f6922709
There are cases that the operands of an expression are all with rank less
than UINT64/INT64 and the result of the expression is explicitly cast to
UINT64/INT64 to fit the target size.
An example will be:
UINT32 a,b;
// a and b can be any unsigned int type with rank less than UINT64, like
// UINT8, UINT16, etc.
UINT64 c;
c = (UINT64) (a + b);
Some static code checkers may warn that the expression result might
overflow within the rank of "int" (integer promotions) and the result is
then cast to a bigger size.
The commit refines codes by the following rules:
1). When the expression is possible to overflow the range of unsigned int/
int:
c = (UINT64)a + b;
2). When the expression will not overflow within the rank of "int", remove
the explicit type casts:
c = a + b;
3). When the expression will be cast to pointer of possible greater size:
UINT32 a,b;
VOID *c;
c = (VOID *)(UINTN)(a + b); --> c = (VOID *)((UINTN)a + b);
4). When one side of a comparison expression contains only operands with
rank less than UINT32:
UINT8 a;
UINT16 b;
UINTN c;
if ((UINTN)(a + b) > c) {...} --> if (((UINT32)a + b) > c) {...}
For rule 4), if we remove the 'UINTN' type cast like:
if (a + b > c) {...}
The VS compiler will complain with warning C4018 (signed/unsigned
mismatch, level 3 warning) due to promoting 'a + b' to type 'int'.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Hao Wu <hao.a.wu@intel.com>
Reviewed-by: Feng Tian <feng.tian@intel.com>
540 lines
19 KiB
C
540 lines
19 KiB
C
/** @file
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Misc library functions.
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Copyright (c) 2011 - 2017, Intel Corporation. All rights reserved.<BR>
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(C) Copyright 2016 Hewlett Packard Enterprise Development LP<BR>
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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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**/
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#include "InternalBm.h"
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/**
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Delete the instance in Multi which matches partly with Single instance
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@param Multi A pointer to a multi-instance device path data
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structure.
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@param Single A pointer to a single-instance device path data
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structure.
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@return This function will remove the device path instances in Multi which partly
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match with the Single, and return the result device path. If there is no
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remaining device path as a result, this function will return NULL.
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**/
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EFI_DEVICE_PATH_PROTOCOL *
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BmDelPartMatchInstance (
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IN EFI_DEVICE_PATH_PROTOCOL *Multi,
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IN EFI_DEVICE_PATH_PROTOCOL *Single
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)
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{
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EFI_DEVICE_PATH_PROTOCOL *Instance;
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EFI_DEVICE_PATH_PROTOCOL *NewDevicePath;
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EFI_DEVICE_PATH_PROTOCOL *TempNewDevicePath;
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UINTN InstanceSize;
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UINTN SingleDpSize;
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NewDevicePath = NULL;
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TempNewDevicePath = NULL;
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if (Multi == NULL || Single == NULL) {
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return Multi;
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}
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Instance = GetNextDevicePathInstance (&Multi, &InstanceSize);
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SingleDpSize = GetDevicePathSize (Single) - END_DEVICE_PATH_LENGTH;
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InstanceSize -= END_DEVICE_PATH_LENGTH;
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while (Instance != NULL) {
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if (CompareMem (Instance, Single, MIN (SingleDpSize, InstanceSize)) != 0) {
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//
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// Append the device path instance which does not match with Single
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//
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TempNewDevicePath = NewDevicePath;
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NewDevicePath = AppendDevicePathInstance (NewDevicePath, Instance);
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if (TempNewDevicePath != NULL) {
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FreePool(TempNewDevicePath);
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}
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}
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FreePool(Instance);
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Instance = GetNextDevicePathInstance (&Multi, &InstanceSize);
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InstanceSize -= END_DEVICE_PATH_LENGTH;
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}
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return NewDevicePath;
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}
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/**
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Function compares a device path data structure to that of all the nodes of a
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second device path instance.
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@param Multi A pointer to a multi-instance device path data
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structure.
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@param Single A pointer to a single-instance device path data
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structure.
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@retval TRUE If the Single device path is contained within Multi device path.
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@retval FALSE The Single device path is not match within Multi device path.
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**/
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BOOLEAN
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BmMatchDevicePaths (
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IN EFI_DEVICE_PATH_PROTOCOL *Multi,
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IN EFI_DEVICE_PATH_PROTOCOL *Single
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)
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{
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EFI_DEVICE_PATH_PROTOCOL *DevicePath;
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EFI_DEVICE_PATH_PROTOCOL *DevicePathInst;
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UINTN Size;
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if (Multi == NULL || Single == NULL) {
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return FALSE;
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}
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DevicePath = Multi;
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DevicePathInst = GetNextDevicePathInstance (&DevicePath, &Size);
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//
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// Search for the match of 'Single' in 'Multi'
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//
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while (DevicePathInst != NULL) {
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//
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// If the single device path is found in multiple device paths,
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// return success
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//
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if (CompareMem (Single, DevicePathInst, Size) == 0) {
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FreePool (DevicePathInst);
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return TRUE;
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}
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FreePool (DevicePathInst);
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DevicePathInst = GetNextDevicePathInstance (&DevicePath, &Size);
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}
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return FALSE;
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}
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/**
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This routine adjust the memory information for different memory type and
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save them into the variables for next boot. It resets the system when
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memory information is updated and the current boot option belongs to
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boot category instead of application category. It doesn't count the
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reserved memory occupied by RAM Disk.
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@param Boot TRUE if current boot option belongs to boot
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category instead of application category.
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**/
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VOID
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BmSetMemoryTypeInformationVariable (
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IN BOOLEAN Boot
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)
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{
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EFI_STATUS Status;
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EFI_MEMORY_TYPE_INFORMATION *PreviousMemoryTypeInformation;
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EFI_MEMORY_TYPE_INFORMATION *CurrentMemoryTypeInformation;
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UINTN VariableSize;
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UINTN Index;
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UINTN Index1;
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UINT32 Previous;
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UINT32 Current;
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UINT32 Next;
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EFI_HOB_GUID_TYPE *GuidHob;
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BOOLEAN MemoryTypeInformationModified;
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BOOLEAN MemoryTypeInformationVariableExists;
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EFI_BOOT_MODE BootMode;
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MemoryTypeInformationModified = FALSE;
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MemoryTypeInformationVariableExists = FALSE;
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BootMode = GetBootModeHob ();
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//
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// In BOOT_IN_RECOVERY_MODE, Variable region is not reliable.
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//
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if (BootMode == BOOT_IN_RECOVERY_MODE) {
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return;
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}
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//
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// Only check the the Memory Type Information variable in the boot mode
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// other than BOOT_WITH_DEFAULT_SETTINGS because the Memory Type
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// Information is not valid in this boot mode.
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//
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if (BootMode != BOOT_WITH_DEFAULT_SETTINGS) {
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VariableSize = 0;
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Status = gRT->GetVariable (
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EFI_MEMORY_TYPE_INFORMATION_VARIABLE_NAME,
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&gEfiMemoryTypeInformationGuid,
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NULL,
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&VariableSize,
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NULL
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);
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if (Status == EFI_BUFFER_TOO_SMALL) {
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MemoryTypeInformationVariableExists = TRUE;
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}
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}
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//
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// Retrieve the current memory usage statistics. If they are not found, then
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// no adjustments can be made to the Memory Type Information variable.
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//
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Status = EfiGetSystemConfigurationTable (
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&gEfiMemoryTypeInformationGuid,
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(VOID **) &CurrentMemoryTypeInformation
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);
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if (EFI_ERROR (Status) || CurrentMemoryTypeInformation == NULL) {
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return;
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}
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//
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// Get the Memory Type Information settings from Hob if they exist,
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// PEI is responsible for getting them from variable and build a Hob to save them.
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// If the previous Memory Type Information is not available, then set defaults
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//
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GuidHob = GetFirstGuidHob (&gEfiMemoryTypeInformationGuid);
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if (GuidHob == NULL) {
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//
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// If Platform has not built Memory Type Info into the Hob, just return.
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//
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return;
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}
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VariableSize = GET_GUID_HOB_DATA_SIZE (GuidHob);
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PreviousMemoryTypeInformation = AllocateCopyPool (VariableSize, GET_GUID_HOB_DATA (GuidHob));
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if (PreviousMemoryTypeInformation == NULL) {
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return;
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}
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//
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// Use a heuristic to adjust the Memory Type Information for the next boot
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//
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DEBUG ((EFI_D_INFO, "Memory Previous Current Next \n"));
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DEBUG ((EFI_D_INFO, " Type Pages Pages Pages \n"));
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DEBUG ((EFI_D_INFO, "====== ======== ======== ========\n"));
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for (Index = 0; PreviousMemoryTypeInformation[Index].Type != EfiMaxMemoryType; Index++) {
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for (Index1 = 0; CurrentMemoryTypeInformation[Index1].Type != EfiMaxMemoryType; Index1++) {
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if (PreviousMemoryTypeInformation[Index].Type == CurrentMemoryTypeInformation[Index1].Type) {
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break;
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}
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}
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if (CurrentMemoryTypeInformation[Index1].Type == EfiMaxMemoryType) {
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continue;
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}
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//
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// Previous is the number of pages pre-allocated
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// Current is the number of pages actually needed
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//
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Previous = PreviousMemoryTypeInformation[Index].NumberOfPages;
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Current = CurrentMemoryTypeInformation[Index1].NumberOfPages;
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Next = Previous;
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//
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// Inconsistent Memory Reserved across bootings may lead to S4 fail
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// Write next varible to 125% * current when the pre-allocated memory is:
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// 1. More than 150% of needed memory and boot mode is BOOT_WITH_DEFAULT_SETTING
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// 2. Less than the needed memory
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//
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if ((Current + (Current >> 1)) < Previous) {
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if (BootMode == BOOT_WITH_DEFAULT_SETTINGS) {
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Next = Current + (Current >> 2);
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}
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} else if (Current > Previous) {
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Next = Current + (Current >> 2);
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}
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if (Next > 0 && Next < 4) {
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Next = 4;
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}
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if (Next != Previous) {
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PreviousMemoryTypeInformation[Index].NumberOfPages = Next;
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MemoryTypeInformationModified = TRUE;
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}
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DEBUG ((EFI_D_INFO, " %02x %08x %08x %08x\n", PreviousMemoryTypeInformation[Index].Type, Previous, Current, Next));
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}
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//
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// If any changes were made to the Memory Type Information settings, then set the new variable value;
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// Or create the variable in first boot.
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//
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if (MemoryTypeInformationModified || !MemoryTypeInformationVariableExists) {
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Status = BmSetVariableAndReportStatusCodeOnError (
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EFI_MEMORY_TYPE_INFORMATION_VARIABLE_NAME,
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&gEfiMemoryTypeInformationGuid,
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EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS,
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VariableSize,
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PreviousMemoryTypeInformation
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);
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if (!EFI_ERROR (Status)) {
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//
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// If the Memory Type Information settings have been modified and the boot option belongs to boot category,
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// then reset the platform so the new Memory Type Information setting will be used to guarantee that an S4
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// entry/resume cycle will not fail.
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//
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if (MemoryTypeInformationModified) {
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DEBUG ((EFI_D_INFO, "Memory Type Information settings change.\n"));
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if (Boot && PcdGetBool (PcdResetOnMemoryTypeInformationChange)) {
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DEBUG ((EFI_D_INFO, "...Warm Reset!!!\n"));
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gRT->ResetSystem (EfiResetWarm, EFI_SUCCESS, 0, NULL);
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}
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}
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} else {
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DEBUG ((EFI_D_ERROR, "Memory Type Information settings cannot be saved. OS S4 may fail!\n"));
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}
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}
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FreePool (PreviousMemoryTypeInformation);
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}
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/**
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Set the variable and report the error through status code upon failure.
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@param VariableName A Null-terminated string that is the name of the vendor's variable.
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Each VariableName is unique for each VendorGuid. VariableName must
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contain 1 or more characters. If VariableName is an empty string,
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then EFI_INVALID_PARAMETER is returned.
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@param VendorGuid A unique identifier for the vendor.
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@param Attributes Attributes bitmask to set for the variable.
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@param DataSize The size in bytes of the Data buffer. Unless the EFI_VARIABLE_APPEND_WRITE,
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EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS, or
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EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS attribute is set, a size of zero
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causes the variable to be deleted. When the EFI_VARIABLE_APPEND_WRITE attribute is
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set, then a SetVariable() call with a DataSize of zero will not cause any change to
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the variable value (the timestamp associated with the variable may be updated however
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even if no new data value is provided,see the description of the
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EFI_VARIABLE_AUTHENTICATION_2 descriptor below. In this case the DataSize will not
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be zero since the EFI_VARIABLE_AUTHENTICATION_2 descriptor will be populated).
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@param Data The contents for the variable.
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@retval EFI_SUCCESS The firmware has successfully stored the variable and its data as
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defined by the Attributes.
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@retval EFI_INVALID_PARAMETER An invalid combination of attribute bits, name, and GUID was supplied, or the
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DataSize exceeds the maximum allowed.
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@retval EFI_INVALID_PARAMETER VariableName is an empty string.
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@retval EFI_OUT_OF_RESOURCES Not enough storage is available to hold the variable and its data.
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@retval EFI_DEVICE_ERROR The variable could not be retrieved due to a hardware error.
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@retval EFI_WRITE_PROTECTED The variable in question is read-only.
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@retval EFI_WRITE_PROTECTED The variable in question cannot be deleted.
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@retval EFI_SECURITY_VIOLATION The variable could not be written due to EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS
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or EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACESS being set, but the AuthInfo
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does NOT pass the validation check carried out by the firmware.
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@retval EFI_NOT_FOUND The variable trying to be updated or deleted was not found.
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**/
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EFI_STATUS
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BmSetVariableAndReportStatusCodeOnError (
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IN CHAR16 *VariableName,
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IN EFI_GUID *VendorGuid,
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IN UINT32 Attributes,
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IN UINTN DataSize,
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IN VOID *Data
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)
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{
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EFI_STATUS Status;
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EDKII_SET_VARIABLE_STATUS *SetVariableStatus;
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UINTN NameSize;
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Status = gRT->SetVariable (
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VariableName,
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VendorGuid,
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Attributes,
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DataSize,
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Data
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);
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if (EFI_ERROR (Status)) {
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NameSize = StrSize (VariableName);
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SetVariableStatus = AllocatePool (sizeof (EDKII_SET_VARIABLE_STATUS) + NameSize + DataSize);
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if (SetVariableStatus != NULL) {
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CopyGuid (&SetVariableStatus->Guid, VendorGuid);
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SetVariableStatus->NameSize = NameSize;
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SetVariableStatus->DataSize = DataSize;
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SetVariableStatus->SetStatus = Status;
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SetVariableStatus->Attributes = Attributes;
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CopyMem (SetVariableStatus + 1, VariableName, NameSize);
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CopyMem (((UINT8 *) (SetVariableStatus + 1)) + NameSize, Data, DataSize);
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REPORT_STATUS_CODE_EX (
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EFI_ERROR_CODE,
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PcdGet32 (PcdErrorCodeSetVariable),
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0,
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NULL,
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&gEdkiiStatusCodeDataTypeVariableGuid,
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SetVariableStatus,
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sizeof (EDKII_SET_VARIABLE_STATUS) + NameSize + DataSize
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);
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FreePool (SetVariableStatus);
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}
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}
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return Status;
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}
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/**
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Print the device path info.
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@param DevicePath The device path need to print.
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**/
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VOID
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BmPrintDp (
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EFI_DEVICE_PATH_PROTOCOL *DevicePath
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)
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{
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CHAR16 *Str;
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Str = ConvertDevicePathToText (DevicePath, FALSE, FALSE);
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DEBUG ((EFI_D_INFO, "%s", Str));
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if (Str != NULL) {
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FreePool (Str);
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}
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}
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/**
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Convert a single character to number.
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It assumes the input Char is in the scope of L'0' ~ L'9' and L'A' ~ L'F'
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@param Char The input char which need to convert to int.
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@return The converted 8-bit number or (UINTN) -1 if conversion failed.
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**/
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UINTN
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BmCharToUint (
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IN CHAR16 Char
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)
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{
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if ((Char >= L'0') && (Char <= L'9')) {
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return (Char - L'0');
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}
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if ((Char >= L'A') && (Char <= L'F')) {
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return (Char - L'A' + 0xA);
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}
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ASSERT (FALSE);
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return (UINTN) -1;
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}
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/**
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Dispatch the deferred images that are returned from all DeferredImageLoad instances.
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@retval EFI_SUCCESS At least one deferred image is loaded successfully and started.
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@retval EFI_NOT_FOUND There is no deferred image.
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@retval EFI_ACCESS_DENIED There are deferred images but all of them are failed to load.
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**/
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EFI_STATUS
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EFIAPI
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EfiBootManagerDispatchDeferredImages (
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VOID
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)
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{
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EFI_STATUS Status;
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EFI_DEFERRED_IMAGE_LOAD_PROTOCOL *DeferredImage;
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UINTN HandleCount;
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EFI_HANDLE *Handles;
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UINTN Index;
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UINTN ImageIndex;
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EFI_DEVICE_PATH_PROTOCOL *ImageDevicePath;
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VOID *Image;
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UINTN ImageSize;
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BOOLEAN BootOption;
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EFI_HANDLE ImageHandle;
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UINTN ExitDataSize;
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CHAR16 *ExitData;
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UINTN ImageCount;
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UINTN LoadCount;
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//
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// Find all the deferred image load protocols.
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//
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HandleCount = 0;
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Handles = NULL;
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Status = gBS->LocateHandleBuffer (
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ByProtocol,
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&gEfiDeferredImageLoadProtocolGuid,
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NULL,
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&HandleCount,
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&Handles
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);
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if (EFI_ERROR (Status)) {
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return EFI_NOT_FOUND;
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}
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ImageCount = 0;
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LoadCount = 0;
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for (Index = 0; Index < HandleCount; Index++) {
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Status = gBS->HandleProtocol (Handles[Index], &gEfiDeferredImageLoadProtocolGuid, (VOID **) &DeferredImage);
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if (EFI_ERROR (Status)) {
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continue;
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}
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for (ImageIndex = 0; ;ImageIndex++) {
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//
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// Load all the deferred images in this protocol instance.
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//
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Status = DeferredImage->GetImageInfo (
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DeferredImage,
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ImageIndex,
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&ImageDevicePath,
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(VOID **) &Image,
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&ImageSize,
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&BootOption
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);
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if (EFI_ERROR (Status)) {
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break;
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}
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ImageCount++;
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//
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// Load and start the image.
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//
|
|
Status = gBS->LoadImage (
|
|
BootOption,
|
|
gImageHandle,
|
|
ImageDevicePath,
|
|
NULL,
|
|
0,
|
|
&ImageHandle
|
|
);
|
|
if (!EFI_ERROR (Status)) {
|
|
LoadCount++;
|
|
//
|
|
// Before calling the image, enable the Watchdog Timer for
|
|
// a 5 Minute period
|
|
//
|
|
gBS->SetWatchdogTimer (5 * 60, 0x0000, 0x00, NULL);
|
|
Status = gBS->StartImage (ImageHandle, &ExitDataSize, &ExitData);
|
|
if (ExitData != NULL) {
|
|
FreePool (ExitData);
|
|
}
|
|
|
|
//
|
|
// Clear the Watchdog Timer after the image returns.
|
|
//
|
|
gBS->SetWatchdogTimer (0x0000, 0x0000, 0x0000, NULL);
|
|
}
|
|
}
|
|
}
|
|
if (Handles != NULL) {
|
|
FreePool (Handles);
|
|
}
|
|
|
|
if (ImageCount == 0) {
|
|
return EFI_NOT_FOUND;
|
|
} else {
|
|
if (LoadCount == 0) {
|
|
return EFI_ACCESS_DENIED;
|
|
} else {
|
|
return EFI_SUCCESS;
|
|
}
|
|
}
|
|
}
|