Add CPUID register

1 files changed, 18 insertions, 0 deletions

diff --git a/rtl/core/cp15/cpuid.sv b/rtl/core/cp15/cpuid.sv
new file mode 100644
index 0000000..fd24631
--- /dev/null
+++ b/rtl/core/cp15/cpuid.sv
@@ -0,0 +1,18 @@
+`include "core/uarch.sv"
+`include "core/cp15/map.sv"
+
+module core_cp15_cpuid
+(
+	output word read
+);
+
+	/* If an <opcode2> value corresponding to an unimplemented or
+	 * reserved ID register is encountered, the System Control
+	 * coprocessor returns the value of the main ID register.
+	 *
+	 * ARM810.pdf, p. 104: Reading from CP15 register 0 returns
+	 * the value 0x4101810x.
+	 */
+	assign read = 32'h41018100;
+
+endmodule