Add LICENSE
[riscv-tests.git] / isa / rv64si / csr.S
1 # See LICENSE for license details.
2
3 #*****************************************************************************
4 # csr.S
5 #-----------------------------------------------------------------------------
6 #
7 # Test CSRRx and CSRRxI instructions.
8 #
9
10 #include "riscv_test.h"
11 #include "test_macros.h"
12
13 RVTEST_RV64S
14 RVTEST_CODE_BEGIN
15
16 # Set up evec in case we trap.
17 la t0, evec
18 csrw evec, t0
19 csrwi count, 0
20
21 csrwi sup0, 3
22 TEST_CASE( 2, a0, 3, csrr a0, sup0);
23 TEST_CASE( 3, a1, 3, csrrci a1, sup0, 1);
24 TEST_CASE( 4, a2, 2, csrrsi a2, sup0, 4);
25 TEST_CASE( 5, a3, 6, csrrwi a3, sup0, 2);
26 TEST_CASE( 6, a1, 2, li a0, 0xbad1dea; csrrw a1, sup0, a0);
27 TEST_CASE( 7, a0, 0xbad1dea, li a0, 0x0001dea; csrrc a0, sup0, a0);
28 TEST_CASE( 8, a0, 0xbad0000, li a0, 0x000beef; csrrs a0, sup0, a0);
29 TEST_CASE( 9, a0, 0xbadbeef, csrr a0, sup0);
30
31 # Make sure writing the cycle counter causes an exception.
32 TEST_CASE(10, a0, 255, li a0, 255; csrrw a0, cycle, x0);
33
34 # Make sure reading status in user mode causes an exception.
35 csrci status, SR_S|SR_PS
36 TEST_CASE(11, a0, 255, li a0, 255; csrr a0, status);
37
38 # Make sure rdcycle is legal in user mode.
39 TEST_CASE(12, x0, 0, rdcycle a0)
40
41 # Exit by doing a syscall.
42 TEST_CASE(13, x0, 1, scall)
43
44 # We should only fall through to this if scall failed.
45 TEST_PASSFAIL
46
47 evec:
48 # Trapping on tests 10, 11, and 13 is usually good news.
49 # Note that since the test didn't complete, TESTNUM is smaller by 1.
50 li t0, 9
51 beq TESTNUM, t0, privileged
52 li t0, 10
53 beq TESTNUM, t0, privileged
54 li t0, 12
55 beq TESTNUM, t0, syscall
56
57 # Trapping on other tests is bad news.
58 j fail
59
60 privileged:
61 # Make sure CAUSE indicates a lack of privilege.
62 csrr t0, cause
63 li t1, CAUSE_PRIVILEGED_INSTRUCTION
64 bne t0, t1, fail
65 # Return to user mode, but skip the trapping instruction.
66 csrr t0, epc
67 addi t0, t0, 4
68 csrw epc, t0
69 sret
70
71 syscall:
72 # Make sure CAUSE indicates a syscall.
73 csrr t0, cause
74 li t1, CAUSE_SYSCALL
75 bne t0, t1, fail
76
77 # We're done.
78 j pass
79
80 RVTEST_CODE_END
81
82 .data
83 RVTEST_DATA_BEGIN
84
85 TEST_DATA
86
87 RVTEST_DATA_END