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DynamicTablesPkg: Test for duplicate GT Block frame numbers 

Check for duplicate frame numbers when populating the GT Block Timer
Frames inside the GTDT table generator.

Signed-off-by: Krzysztof Koch <krzysztof.koch@arm.com>
Reviewed-by: Alexei Fedorov <Alexei.Fedorov@arm.com>
Reviewed-by: Sami Mujawar <sami.mujawar@arm.com>
This commit is contained in:
Krzysztof Koch 2019-04-09 14:44:37 +01:00 committed by Sami Mujawar
parent 28b824d707
commit ccc97f6df4
1 changed files with 64 additions and 2 deletions
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62
DynamicTablesPkg/Library/Acpi/Arm/AcpiGtdtLibArm/GtdtGenerator.c
View File

@ -179,6 +179,55 @@ AddGenericWatchdogList (
} // for
}
/**
Function to test if two Generic Timer Block Frame Info structures have the
same frame number.
@param [in] Frame1 Pointer to the first GT Block Frame Info
structure.
@param [in] Frame2 Pointer to the second GT Block Frame Info
structure.
@param [in] Index1 Index of Frame1 in the shared GT Block Frame
Information List.
@param [in] Index2 Index of Frame2 in the shared GT Block Frame
Information List.
@retval TRUE Frame1 and Frame2 have the same frame number.
@return FALSE Frame1 and Frame2 have different frame numbers.
**/
BOOLEAN
EFIAPI
IsGtFrameNumberEqual (
IN CONST VOID * Frame1,
IN CONST VOID * Frame2,
IN UINTN Index1,
IN UINTN Index2
)
{
UINT8 FrameNumber1;
UINT8 FrameNumber2;
ASSERT ((Frame1 != NULL) && (Frame2 != NULL));
FrameNumber1 = ((CM_ARM_GTBLOCK_TIMER_FRAME_INFO*)Frame1)->FrameNumber;
FrameNumber2 = ((CM_ARM_GTBLOCK_TIMER_FRAME_INFO*)Frame2)->FrameNumber;
if (FrameNumber1 == FrameNumber2) {
DEBUG ((
DEBUG_ERROR,
"ERROR: GTDT: GT Block Frame Info Structures %d and %d have the same " \
"frame number: 0x%x.\n",
Index1,
Index2,
FrameNumber1
));
return TRUE;
}
return FALSE;
}
/** Update the GT Block Timer Frame lists in the GTDT Table.
@param [in] GtBlockFrame Pointer to the GT Block Frames
@ -198,6 +247,8 @@ AddGTBlockTimerFrames (
IN UINT32 GTBlockFrameCount
)
{
BOOLEAN IsFrameNumberDuplicated;
ASSERT (GtBlockFrame != NULL);
ASSERT (GTBlockTimerFrameList != NULL);
@ -211,6 +262,17 @@ AddGTBlockTimerFrames (
return EFI_INVALID_PARAMETER;
}
IsFrameNumberDuplicated = FindDuplicateValue (
GTBlockTimerFrameList,
GTBlockFrameCount,
sizeof (CM_ARM_GTBLOCK_TIMER_FRAME_INFO),
IsGtFrameNumberEqual
);
// Duplicate entry was found so timer frame numbers provided are invalid
if (IsFrameNumberDuplicated) {
return EFI_INVALID_PARAMETER;
}
while (GTBlockFrameCount-- != 0) {
DEBUG ((
DEBUG_INFO,