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# See LICENSE for license details.
#*****************************************************************************
# illegal.S
#-----------------------------------------------------------------------------
#
# Test illegal instruction trap.
#
#include "riscv_test.h"
#include "test_macros.h"
RVTEST_RV64M
RVTEST_CODE_BEGIN
.align 2
.option norvc
li TESTNUM, 2
bad2:
.word 0
j fail
# Skip the rest of the test if S-mode is not present.
li t0, MSTATUS_MPP
csrc mstatus, t0
li t1, (MSTATUS_MPP & -MSTATUS_MPP) * PRV_S
csrs mstatus, t1
csrr t2, mstatus
and t2, t2, t0
bne t1, t2, pass
# Test vectored interrupts if they are supported.
test_vectored_interrupts:
csrwi mip, MIP_SSIP
csrwi mie, MIP_SSIP
la t0, mtvec_handler + 1
csrrw s0, mtvec, t0
csrr t0, mtvec
andi t0, t0, 1
beqz t0, msip
csrsi mstatus, MSTATUS_MIE
1:
j 1b
msip:
csrw mtvec, s0
# Delegate supervisor software interrupts so WFI won't stall.
csrwi mideleg, MIP_SSIP
# Enter supervisor mode.
la t0, 1f
csrw mepc, t0
li t0, MSTATUS_MPP
csrc mstatus, t0
li t1, (MSTATUS_MPP & -MSTATUS_MPP) * PRV_S
csrs mstatus, t1
mret
1:
# Make sure WFI doesn't trap when TW=0.
wfi
# Check if paging is supported (Set SUM & MXR and read it back)
and t0, t0, zero
li t0, (SSTATUS_SUM | SSTATUS_MXR)
csrc sstatus, t0
and t1, t1, zero
li t1, (SSTATUS_SUM | SSTATUS_MXR)
csrs sstatus, t1
csrr t2, sstatus
and t2, t2, t0
beqz t2, bare_s_1
csrc sstatus, t0
# Make sure SFENCE.VMA and sptbr don't trap when TVM=0.
sfence.vma
csrr t0, sptbr
bad5:
.word 0
j fail
bad6:
# Make sure SFENCE.VMA and sptbr do trap when TVM=1.
sfence.vma
j fail
bad7:
csrr t0, sptbr
j fail
test_tsr:
# Make sure SRET doesn't trap when TSR=0.
la t0, bad8
csrw sepc, t0
li t0, SSTATUS_SPP
csrs sstatus, t0
li t0, SSTATUS_SPIE
csrc sstatus, t0
sret
bad8:
.word 0
j fail
# Make sure SRET does trap when TSR=1.
la t0, 1f
csrw sepc, t0
bad9:
sret
1:
j fail
j skip_bare_s
bare_s_1:
# Make sure SFENCE.VMA trap when TVM=0.
sfence.vma
j fail
bare_s_2:
# Set TVM=1. TVM should stay 0 and SFENCE.VMA should still trap
sfence.vma
j fail
# And access to satp should not trap
csrr t0, sptbr
bare_s_3:
.word 0
j fail
j test_tsr
skip_bare_s:
TEST_PASSFAIL
.align 8
.global mtvec_handler
mtvec_handler:
j synchronous_exception
j msip
j fail
j fail
j fail
j fail
j fail
j fail
j fail
j fail
j fail
j fail
j fail
j fail
j fail
j fail
synchronous_exception:
li t1, CAUSE_ILLEGAL_INSTRUCTION
csrr t0, mcause
bne t0, t1, fail
csrr t0, mepc
# Make sure mtval contains either 0 or the instruction word.
csrr t2, mbadaddr
beqz t2, 1f
lhu t1, 0(t0)
xor t2, t2, t1
lhu t1, 2(t0)
slli t1, t1, 16
xor t2, t2, t1
bnez t2, fail
1:
la t1, bad2
beq t0, t1, 2f
la t1, bad5
beq t0, t1, 5f
la t1, bad6
beq t0, t1, 6f
la t1, bad7
beq t0, t1, 7f
la t1, bad8
beq t0, t1, 8f
la t1, bad9
beq t0, t1, 9f
la t1, bare_s_1
beq t0, t1, 5f
la t1, bare_s_2
beq t0, t1, 7f
la t1, bare_s_3
beq t0, t1, 7f
j fail
2:
6:
7:
addi t0, t0, 8
csrw mepc, t0
mret
5:
li t1, MSTATUS_TVM
csrs mstatus, t1
j 2b
8:
li t1, MSTATUS_TSR
csrs mstatus, t1
j 2b
9:
j 2b
RVTEST_CODE_END
.data
RVTEST_DATA_BEGIN
TEST_DATA
RVTEST_DATA_END
|
