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# See LICENSE for license details.
#*****************************************************************************
# dirty.S
#-----------------------------------------------------------------------------
#
# Test VM referenced and dirty bits.
#
#include "riscv_test.h"
#include "test_macros.h"
RVTEST_RV64M
RVTEST_CODE_BEGIN
# Turn on VM with superpage identity mapping
li a0, (SPTBR_MODE & ~(SPTBR_MODE<<1)) * SPTBR_MODE_SV39
la a1, page_table_1
srl a1, a1, RISCV_PGSHIFT
or a1, a1, a0
la a2, page_table_2
srl a2, a2, RISCV_PGSHIFT
or a2, a2, a0
csrw sptbr, a1
sfence.vma
li a1, ((MSTATUS_MPP & ~(MSTATUS_MPP<<1)) * PRV_S) | MSTATUS_SUM
csrs mstatus, a1
la a1, 1f - DRAM_BASE
csrw mepc, a1
la a1, stvec_handler - DRAM_BASE
csrw stvec, a1
mret
1:
# Try a faulting store to make sure dirty bit is not set
li TESTNUM, 2
li t0, 1
sw t0, dummy, t1
# Load new page table
li TESTNUM, 3
csrw sptbr, a2
sfence.vma
# Try a non-faulting store to make sure dirty bit is set
sw t0, dummy, t1
# Make sure D bit is set
lw t0, page_table_2
li t1, PTE_A | PTE_D
and t0, t0, t1
bne t0, t1, die
RVTEST_PASS
TEST_PASSFAIL
.align 2
stvec_handler:
csrr t0, scause
add t0, t0, -CAUSE_FAULT_STORE
bnez t0, die
li t1, 2
bne TESTNUM, t1, 1f
# Make sure D bit is clear
lw t0, page_table_1
and t1, t0, PTE_D
bnez t1, die
skip:
csrr t0, sepc
add t0, t0, 4
csrw sepc, t0
sret
1:
li t1, 3
bne TESTNUM, t1, 1f
# The implementation doesn't appear to set D bits in HW. Skip the test,
# after making sure the D bit is clear.
lw t0, page_table_2
and t1, t0, PTE_D
bnez t1, die
j pass
1:
die:
RVTEST_FAIL
RVTEST_CODE_END
.data
RVTEST_DATA_BEGIN
TEST_DATA
.align 12
page_table_1: .dword (DRAM_BASE/RISCV_PGSIZE << PTE_PPN_SHIFT) | PTE_V | PTE_U | PTE_R | PTE_X | PTE_A
dummy: .dword 0
.align 12
page_table_2: .dword (DRAM_BASE/RISCV_PGSIZE << PTE_PPN_SHIFT) | PTE_V | PTE_U | PTE_R | PTE_X | PTE_W | PTE_A
RVTEST_DATA_END
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