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-rw-r--r--ArmPkg/Library/ArmLib/ArmV7/ArmLibSupportV7.S6
-rw-r--r--ArmPkg/Library/ArmLib/ArmV7/ArmLibSupportV7.asm6
2 files changed, 8 insertions, 4 deletions
diff --git a/ArmPkg/Library/ArmLib/ArmV7/ArmLibSupportV7.S b/ArmPkg/Library/ArmLib/ArmV7/ArmLibSupportV7.S
index 333827a992..b94239f785 100644
--- a/ArmPkg/Library/ArmLib/ArmV7/ArmLibSupportV7.S
+++ b/ArmPkg/Library/ArmLib/ArmV7/ArmLibSupportV7.S
@@ -38,8 +38,10 @@ ASM_PFX(ArmIsMpCore):
mrc p15,0,R0,c0,c0,5
// Get Multiprocessing extension (bit31) & U bit (bit30)
and R0, R0, #0xC0000000
- // if bit30 == 0 then the processor is part of a multiprocessor system)
- and R0, R0, #0x80000000
+ // if (bit31 == 1) && (bit30 == 0) then the processor is part of a multiprocessor system
+ cmp R0, #0x80000000
+ moveq R0, #1
+ movne R0, #0
bx LR
ASM_PFX(ArmEnableAsynchronousAbort):
diff --git a/ArmPkg/Library/ArmLib/ArmV7/ArmLibSupportV7.asm b/ArmPkg/Library/ArmLib/ArmV7/ArmLibSupportV7.asm
index d60d4ed213..82daa3ce16 100644
--- a/ArmPkg/Library/ArmLib/ArmV7/ArmLibSupportV7.asm
+++ b/ArmPkg/Library/ArmLib/ArmV7/ArmLibSupportV7.asm
@@ -37,8 +37,10 @@ ArmIsMpCore
mrc p15,0,R0,c0,c0,5
// Get Multiprocessing extension (bit31) & U bit (bit30)
and R0, R0, #0xC0000000
- // if bit30 == 0 then the processor is part of a multiprocessor system)
- and R0, R0, #0x80000000
+ // if (bit31 == 1) && (bit30 == 0) then the processor is part of a multiprocessor system
+ cmp R0, #0x80000000
+ moveq R0, #1
+ movne R0, #0
bx LR
ArmEnableAsynchronousAbort