Add interrupt enable/disable and soft timer - v0.1.1

Author: donbarnetson

libhexfive.h

@@ -12,19 +12,27 @@
    See the License for the specific language governing permissions and
    limitations under the License.
 */
+/* Copyright(C) 2018 Hex Five Security, Inc. - All Rights Reserved */
 
 #include <unistd.h>
 
 #ifndef LIBHEXFIVE_H_
 #define LIBHEXFIVE_H_
 
 void ECALL_YIELD();
+void ECALL_WFI();
+
 void ECALL_SEND(int, void *);
 void ECALL_RECV(int, void *);
 
 void ECALL_TRP_VECT(int, void *);
 void ECALL_IRQ_VECT(int, void *);
 
+void ECALL_CSRS_MIE();
+void ECALL_CSRC_MIE();
+
+void ECALL_CSRW_MTIMECMP(uint64_t);
+
 uint64_t ECALL_CSRR_MTIME();
 uint64_t ECALL_CSRR_MCYCLE();
 uint64_t ECALL_CSRR_MINSTR();