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tried to improve testing of csri in privileged module

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harshinisrinath 2023-08-20 15:40:02 -07:00
parent 24ab643576
commit fce2023aa8
2 changed files with 13 additions and 1 deletions
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2
testbench/tests.vh
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@ -44,10 +44,10 @@ string tvpaths[] = '{
string coverage64gc[] = '{ string coverage64gc[] = '{
`COVERAGE, `COVERAGE,
"priv",
"ieu", "ieu",
"ebu", "ebu",
"csrwrites", "csrwrites",
"priv",
"ifu", "ifu",
"fpu", "fpu",
"lsu", "lsu",

12
tests/coverage/priv.S
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@ -59,11 +59,23 @@ sretdone:
# 1st is when MENVCFG_STCE is cleared # 1st is when MENVCFG_STCE is cleared
li a0, 3 li a0, 3
ecall # starts in M-mode ecall # starts in M-mode
li t1, -3
csrw stimecmp, t1 # sets stimecmp to large value to prevent it from interrupting immediately
li t0, 2
csrs mstatus, t0 # enables sie
li t0, 32
csrs sie, t0 # enables sie.stie
csrw menvcfg, x0 csrw menvcfg, x0
li a0, 1 li a0, 1
ecall # enter S-mode ecall # enter S-mode
csrw stimecmp, zero csrw stimecmp, zero
li a0, 3 li a0, 3
ecall # in M-mode
li t0, 32
csrs sip, t0
li a0, 1
ecall # in S-mode and expects stimer interrupt to occur
li a0, 3
ecall # return to M-mode ecall # return to M-mode
csrsi mcounteren, 2 # mcounteren_tm = 1 csrsi mcounteren, 2 # mcounteren_tm = 1
li a0, 1 li a0, 1