+# See LICENSE for license details.
+
#*****************************************************************************
# csr.S
#-----------------------------------------------------------------------------
RVTEST_RV64S
RVTEST_CODE_BEGIN
- csrwi sup0, 3
- TEST_CASE( 2, a0, 3, csrr a0, sup0);
- TEST_CASE( 3, a1, 3, csrrci a1, sup0, 1);
- TEST_CASE( 4, a2, 2, csrrsi a2, sup0, 4);
- TEST_CASE( 5, a3, 6, csrrwi a3, sup0, 2);
- TEST_CASE( 6, a1, 2, li a0, 0xbad1dea; csrrw a1, sup0, a0);
- TEST_CASE( 7, a0, 0xbad1dea, li a0, 0x0001dea; csrrc a0, sup0, a0);
- TEST_CASE( 8, a0, 0xbad0000, li a0, 0x000beef; csrrs a0, sup0, a0);
- TEST_CASE( 9, a0, 0xbadbeef, csrr a0, sup0);
+#ifdef __MACHINE_MODE
+ #define sscratch mscratch
+ #define sstatus mstatus
+ #define scause mcause
+ #define sepc mepc
+ #define stvec_handler mtvec_handler
+ #undef SSTATUS_SPP
+ #define SSTATUS_SPP MSTATUS_MPP
+#endif
+
+ csrwi sscratch, 3
+ TEST_CASE( 2, a0, 3, csrr a0, sscratch);
+ TEST_CASE( 3, a1, 3, csrrci a1, sscratch, 1);
+ TEST_CASE( 4, a2, 2, csrrsi a2, sscratch, 4);
+ TEST_CASE( 5, a3, 6, csrrwi a3, sscratch, 2);
+ TEST_CASE( 6, a1, 2, li a0, 0xbad1dea; csrrw a1, sscratch, a0);
+ TEST_CASE( 7, a0, 0xbad1dea, li a0, 0x0001dea; csrrc a0, sscratch, a0);
+ TEST_CASE( 8, a0, 0xbad0000, li a0, 0x000beef; csrrs a0, sscratch, a0);
+ TEST_CASE( 9, a0, 0xbadbeef, csrr a0, sscratch);
+
+ # Make sure writing the cycle counter causes an exception.
+ # Don't run in supervisor, as we don't delegate illegal instruction traps.
+#ifdef __MACHINE_MODE
+ TEST_CASE(10, a0, 255, li a0, 255; csrrw a0, cycle, x0);
+#endif
+
+ # jump to user land
+ li t0, SSTATUS_SPP
+ csrc sstatus, t0
+ la t0, 1f
+ csrw sepc, t0
+ sret
+ 1:
+
+ # Make sure reading status in user mode causes an exception.
+ # Don't run in supervisor, as we don't delegate illegal instruction traps.
+#ifdef __MACHINE_MODE
+ TEST_CASE(11, a0, 255, li a0, 255; csrr a0, sstatus)
+#else
+ TEST_CASE(11, x0, 0, nop)
+#endif
+
+ # Exit by doing a syscall.
+ TEST_CASE(12, x0, 1, scall)
+ # We should only fall through to this if scall failed.
TEST_PASSFAIL
+stvec_handler:
+ # Trapping on tests 11 and 12 is usually good news.
+ # Note that since the test didn't complete, TESTNUM is smaller by 1.
+ li t0, 9
+ beq TESTNUM, t0, privileged
+ li t0, 10
+ beq TESTNUM, t0, privileged
+ li t0, 11
+ beq TESTNUM, t0, syscall
+
+ # Trapping on other tests is bad news.
+ j fail
+
+privileged:
+ # Make sure scause indicates a lack of privilege.
+ csrr t0, scause
+ li t1, CAUSE_ILLEGAL_INSTRUCTION
+ bne t0, t1, fail
+ # Return to user mode, but skip the trapping instruction.
+ csrr t0, sepc
+ addi t0, t0, 4
+ csrw sepc, t0
+ sret
+
+syscall:
+ # Make sure scause indicates a syscall.
+ csrr t0, scause
+ li t1, CAUSE_USER_ECALL
+ bne t0, t1, fail
+
+ # We're done.
+ j pass
+
RVTEST_CODE_END
.data