ARM: Move PC mode bits around so they can be used for exectrace

1 files changed, 7 insertions, 0 deletions

diff --git a/src/arch/arm/isa_traits.hh b/src/arch/arm/isa_traits.hh
index 00c4c2932..4cffe3bec 100644
--- a/src/arch/arm/isa_traits.hh
+++ b/src/arch/arm/isa_traits.hh
@@ -121,6 +121,13 @@ namespace ArmISA
 
     // Memory accesses cannot be unaligned
     const bool HasUnalignedMemAcc = false;
+
+    // These otherwise unused bits of the PC are used to select a mode
+    // like the J and T bits of the CPSR.
+    static const Addr PcJBitShift = 33;
+    static const Addr PcTBitShift = 34;
+    static const Addr PcModeMask = (ULL(1) << PcJBitShift) |
+                                   (ULL(1) << PcTBitShift);
 };
 
 using namespace ArmISA;