According to the GIC architecture version 3 and 4 specification,
the maximum number of INTID bits supported in the CPU interface
is 24.
Considering this the RegShift variable is not required to be more
than 8 bits. Therefore, make the RegShift variable type to UINT8.
Also add necessary typecasts when calculating the RegOffset and
RegShift values.
Signed-off-by: Sami Mujawar <sami.mujawar@arm.com>
---
ArmPkg/Drivers/ArmGic/ArmGicLib.c | 24 ++++++++++----------
ArmPkg/Drivers/ArmGic/GicV2/ArmGicV2Dxe.c | 8 +++----
2 files changed, 16 insertions(+), 16 deletions(-)
diff --git a/ArmPkg/Drivers/ArmGic/ArmGicLib.c b/ArmPkg/Drivers/ArmGic/ArmGicLib.c
index 0127cca3bf0567bc80702f415e9cbb9bd2709fbc..8f3315d76f6f2b28a551d73400938430ff3e23c7 100644
--- a/ArmPkg/Drivers/ArmGic/ArmGicLib.c
+++ b/ArmPkg/Drivers/ArmGic/ArmGicLib.c
@@ -228,13 +228,13 @@ ArmGicSetInterruptPriority (
)
{
UINT32 RegOffset;
- UINTN RegShift;
+ UINT8 RegShift;
ARM_GIC_ARCH_REVISION Revision;
UINTN GicCpuRedistributorBase;
// Calculate register offset and bit position
- RegOffset = Source / 4;
- RegShift = (Source % 4) * 8;
+ RegOffset = (UINT32)(Source / 4);
+ RegShift = (UINT8)((Source % 4) * 8);
Revision = ArmGicGetSupportedArchRevision ();
if ((Revision == ARM_GIC_ARCH_REVISION_2) ||
@@ -272,13 +272,13 @@ ArmGicEnableInterrupt (
)
{
UINT32 RegOffset;
- UINTN RegShift;
+ UINT8 RegShift;
ARM_GIC_ARCH_REVISION Revision;
UINTN GicCpuRedistributorBase;
// Calculate enable register offset and bit position
- RegOffset = Source / 32;
- RegShift = Source % 32;
+ RegOffset = (UINT32)(Source / 32);
+ RegShift = (UINT8)(Source % 32);
Revision = ArmGicGetSupportedArchRevision ();
if ((Revision == ARM_GIC_ARCH_REVISION_2) ||
@@ -317,13 +317,13 @@ ArmGicDisableInterrupt (
)
{
UINT32 RegOffset;
- UINTN RegShift;
+ UINT8 RegShift;
ARM_GIC_ARCH_REVISION Revision;
UINTN GicCpuRedistributorBase;
// Calculate enable register offset and bit position
- RegOffset = Source / 32;
- RegShift = Source % 32;
+ RegOffset = (UINT32)(Source / 32);
+ RegShift = (UINT8)(Source % 32);
Revision = ArmGicGetSupportedArchRevision ();
if ((Revision == ARM_GIC_ARCH_REVISION_2) ||
@@ -361,14 +361,14 @@ ArmGicIsInterruptEnabled (
)
{
UINT32 RegOffset;
- UINTN RegShift;
+ UINT8 RegShift;
ARM_GIC_ARCH_REVISION Revision;
UINTN GicCpuRedistributorBase;
UINT32 Interrupts;
// Calculate enable register offset and bit position
- RegOffset = Source / 32;
- RegShift = Source % 32;
+ RegOffset = (UINT32)(Source / 32);
+ RegShift = (UINT8)(Source % 32);
Revision = ArmGicGetSupportedArchRevision ();
if ((Revision == ARM_GIC_ARCH_REVISION_2) ||
diff --git a/ArmPkg/Drivers/ArmGic/GicV2/ArmGicV2Dxe.c b/ArmPkg/Drivers/ArmGic/GicV2/ArmGicV2Dxe.c
index fb40f56ff9231f3a28c3d90939bfd25ac3432f89..ba43150fe57015994573d82c88d6a8d9f3174533 100644
--- a/ArmPkg/Drivers/ArmGic/GicV2/ArmGicV2Dxe.c
+++ b/ArmPkg/Drivers/ArmGic/GicV2/ArmGicV2Dxe.c
@@ -2,7 +2,7 @@
Copyright (c) 2009, Hewlett-Packard Company. All rights reserved.<BR>
Portions copyright (c) 2010, Apple Inc. All rights reserved.<BR>
-Portions copyright (c) 2011-2021, Arm Ltd. All rights reserved.<BR>
+Portions copyright (c) 2011-2023, Arm Ltd. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
@@ -393,7 +393,7 @@ GicV2DxeInitialize (
EFI_STATUS Status;
UINTN Index;
UINT32 RegOffset;
- UINTN RegShift;
+ UINT8 RegShift;
UINT32 CpuTarget;
// Make sure the Interrupt Controller Protocol is not already installed in
@@ -408,8 +408,8 @@ GicV2DxeInitialize (
GicV2DisableInterruptSource (&gHardwareInterruptV2Protocol, Index);
// Set Priority
- RegOffset = Index / 4;
- RegShift = (Index % 4) * 8;
+ RegOffset = (UINT32)(Index / 4);
+ RegShift = (UINT8)((Index % 4) * 8);
MmioAndThenOr32 (
mGicDistributorBase + ARM_GIC_ICDIPR + (4 * RegOffset),
~(0xff << RegShift),
--
'Guid(CE165669-3EF3-493F-B85D-6190EE5B9759)'
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