1 files changed, 93 insertions, 0 deletions
diff --git a/isa/rv64si/dirty.S b/isa/rv64si/dirty.S
new file mode 100644
index 0000000..0314cf5
--- /dev/null
+++ b/isa/rv64si/dirty.S
@@ -0,0 +1,93 @@
+# 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
+  la a1, page_table_1
+  srl a1, a1, RISCV_PGSHIFT
+  la a2, page_table_2
+  srl a2, a2, RISCV_PGSHIFT
+  csrw sptbr, a1
+  sfence.vm
+  li a1, ((MSTATUS_VM & ~(MSTATUS_VM<<1)) * VM_SV39) | ((MSTATUS_MPP & ~(MSTATUS_MPP<<1)) * PRV_S)
+  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.vm
+
+  # Try a non-faulting store to make sure dirty bit is set
+  sw t0, dummy, t1
+
+  # Make sure R and D bits are 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
+  li t1, 2
+  bne TESTNUM, t1, 1f
+  # Make sure R bit is set
+  lw t0, page_table_1
+  li t1, PTE_A
+  and t0, t0, t1
+  bne t0, t1, die
+
+  # Make sure D bit is clear
+  lw t0, page_table_1
+  li t1, PTE_D
+  and t0, t0, t1
+  beq t0, t1, die
+
+  csrr t0, sepc
+  add t0, t0, 4
+  csrw sepc, t0
+  sret
+
+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
+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
+
+RVTEST_DATA_END