riscv64-nemu,cte: set PMP before entering S-mode

2020-03-10 17:10:12 +08:00 · 2020-03-10 17:10:12 +08:00 · c297b3bce5
parent c4bf428536
commit c297b3bce5
1 changed files with 4 additions and 0 deletions
--- a/am/src/nemu/isa/riscv/cte64.c
+++ b/am/src/nemu/isa/riscv/cte64.c
@ -37,6 +37,10 @@ void __am_init_cte64() {
  asm volatile("csrw mideleg, %0" : : "r"(0xffff));
  asm volatile("csrw medeleg, %0" : : "r"(0xffff));

+  // set PMP to access all memory in S-mode
+  asm volatile("csrw pmpaddr0, %0" : : "r"(-1));
+  asm volatile("csrw pmpcfg0, %0" : : "r"(31));
+
  init_timer();

  // enter S-mode