Merge pull request #583 from jordancarlin/main

Privilege coverage improvements

tests/coverage/csrwrites.S

@@ -37,4 +37,31 @@ main:
     csrrw t1, menvcfg, t0
     csrrw t2, senvcfg, t0
 
+    # testing FIOM with different privelege modes
+    # setting environment config (to both 1 and 0) in each privelege mode
+    csrsi menvcfg, 1
+    li a0, 1
+    ecall               # enter supervisor mode
+
+    li a0, 0            
+    ecall               # enter user mode
+
+    li a0, 1
+    ecall               # enter supervisor mode
+
+    csrsi senvcfg, 1
+    li a0, 0
+    ecall               # enter user mode
+
+    li a0, 3
+    ecall               # enter machine mode
+    csrci menvcfg, 1
+
+    li a0, 1
+    ecall               # enter supervisor mode
+
+    li a0, 0
+    ecall               # enter user mode
+
+
     j done

tests/coverage/priv.S

@@ -297,6 +297,16 @@ sretdone:
 
     wfi
 
+
+
+    # Test uncovered privdec instructions
+    # exercise sfence.inval.ir instruction
+    .word 0x18100073
+
+    # exercise sret with rs1 not 0
+    .word 0x102F8073
+
+
     j done