1 # See LICENSE for license details.
3 #*****************************************************************************
5 #-----------------------------------------------------------------------------
7 # Test CSRRx and CSRRxI instructions.
10 #include "riscv_test.h"
11 #include "test_macros.h"
17 #define sscratch mscratch
18 #define sstatus mstatus
22 #define stvec_handler mtvec_handler
24 #define SSTATUS_SPP MSTATUS_MPP
28 TEST_CASE( 2, a0, 3, csrr a0, sscratch);
29 TEST_CASE( 3, a1, 3, csrrci a1, sscratch, 1);
30 TEST_CASE( 4, a2, 2, csrrsi a2, sscratch, 4);
31 TEST_CASE( 5, a3, 6, csrrwi a3, sscratch, 2);
32 TEST_CASE( 6, a1, 2, li a0, 0xbad1dea; csrrw a1, sscratch, a0);
33 TEST_CASE( 7, a0, 0xbad1dea, li a0, 0x0001dea; csrrc a0, sscratch, a0);
34 TEST_CASE( 8, a0, 0xbad0000, li a0, 0x000beef; csrrs a0, sscratch, a0);
35 TEST_CASE( 9, a0, 0xbadbeef, csrr a0, sscratch);
38 # Figure out if 'U' is set in misa
39 csrr a0, misa # a0 = csr(misa)
40 srli a0, a0, 20 # a0 = a0 >> 20
41 andi a0, a0, 1 # a0 = a0 & 1
42 beqz a0, finish # if no user mode, skip the rest of these checks
53 # Make sure writing the cycle counter causes an exception.
54 # Don't run in supervisor, as we don't delegate illegal instruction traps.
56 TEST_CASE(10, a0, 255, li a0, 255; csrrw a0, cycle, x0);
59 # Make sure reading status in user mode causes an exception.
60 # Don't run in supervisor, as we don't delegate illegal instruction traps.
62 TEST_CASE(11, a0, 255, li a0, 255; csrr a0, sstatus)
64 TEST_CASE(11, x0, 0, nop)
70 # We should only fall through to this if scall failed.
75 # Trapping on tests 10 and 11 is good news.
76 # Note that since the test didn't complete, TESTNUM is smaller by 1.
78 beq TESTNUM, t0, privileged
80 beq TESTNUM, t0, privileged
82 # catch RVTEST_PASS and kick it up to M-mode
84 li t1, CAUSE_USER_ECALL
89 # Make sure scause indicates a lack of privilege.
91 li t1, CAUSE_ILLEGAL_INSTRUCTION
93 # Return to user mode, but skip the trapping instruction.