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ArmPkg/BdsLib: Move some functions used to create/update BDS Boot Entry from ArmPlatformPkg/Bds to ArmPkg/BdsLib

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These functions can be reused by any EFI application to add/update a BDS Boot Entry.



git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12314 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
oliviermartin
2011-09-09 10:54:33 +00:00
parent 2755d844f9
commit 4aa2417061
6 changed files with 112 additions and 172 deletions
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53
ArmPkg/Library/BdsLib/BdsHelper.c
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@@ -289,3 +289,56 @@ PrintPerformance (
CharCount = AsciiSPrint (Buffer,sizeof (Buffer),"Total Time = %ld ms\n\n", DivU64x64Remainder (MultU64x32 (TimeStamp, 1000), TicksPerSecond, NULL));
SerialPortWrite ((UINT8 *) Buffer, CharCount);
}
EFI_STATUS
GetEnvironmentVariable (
IN CONST CHAR16* VariableName,
IN VOID* DefaultValue,
IN OUT UINTN* Size,
OUT VOID** Value
)
{
EFI_STATUS Status;
UINTN VariableSize;
// Try to get the variable size.
*Value = NULL;
VariableSize = 0;
Status = gRT->GetVariable ((CHAR16 *) VariableName, &gEfiGlobalVariableGuid, NULL, &VariableSize, *Value);
if (Status == EFI_NOT_FOUND) {
if ((DefaultValue != NULL) && (Size != NULL) && (*Size != 0)) {
// If the environment variable does not exist yet then set it with the default value
Status = gRT->SetVariable (
(CHAR16*)VariableName,
&gEfiGlobalVariableGuid,
EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
*Size,
DefaultValue
);
*Value = DefaultValue;
} else {
return EFI_NOT_FOUND;
}
} else if (Status == EFI_BUFFER_TOO_SMALL) {
// Get the environment variable value
*Value = AllocatePool (VariableSize);
if (*Value == NULL) {
return EFI_OUT_OF_RESOURCES;
}
Status = gRT->GetVariable ((CHAR16 *)VariableName, &gEfiGlobalVariableGuid, NULL, &VariableSize, *Value);
if (EFI_ERROR (Status)) {
FreePool(*Value);
return EFI_INVALID_PARAMETER;
}
if (Size) {
*Size = VariableSize;
}
} else {
*Value = DefaultValue;
return Status;
}
return EFI_SUCCESS;
}