CSR: SSTATUS=MSTATUS

src/cpu/csr.c

@@ -7,7 +7,8 @@ uint32_t csr_read(struct RV32_CPU* cpu, uint32_t csr)
 	{
 		case CSR_CYCLE:
 			return cpu->sim_ticks_done;
-			break;
+		case CSR_SSTATUS:
+			return csr_read(cpu, CSR_MSTATUS);
 		default:
 			break;
 	}
@@ -17,5 +18,13 @@ uint32_t csr_read(struct RV32_CPU* cpu, uint32_t csr)
 
 void csr_write(struct RV32_CPU* cpu, uint32_t csr, uint32_t value)
 {
+	switch(csr)
+	{
+		case CSR_SSTATUS:
+			csr_write(cpu, CSR_MSTATUS, value);
+			return;
+		default:
+			break;
+	}
 	cpu->csr[csr] = value;
 }