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-rw-r--r--rtl/core/decode/isa.sv4
1 files changed, 4 insertions, 0 deletions
diff --git a/rtl/core/decode/isa.sv b/rtl/core/decode/isa.sv
index 7c27f49..4c9f316 100644
--- a/rtl/core/decode/isa.sv
+++ b/rtl/core/decode/isa.sv
@@ -209,4 +209,8 @@
`define FIELD_SWI_IMM [23:0]
+// GDB swbreak (a magic 'und')
+
+`define INSN_GDB_SWBREAK 28'h7ffdefe
+
`endif