fix(prototyper): make fence sub after add (#39)

fix(prototyper): After suspend wfi, clear once ipi, and make suspend
		 happend after set msoft.

Signed-off-by: Woshiluo Luo <woshiluo.luo@outlook.com>

prototyper/src/sbi/hsm.rs

@@ -231,14 +231,15 @@ impl rustsbi::Hsm for SbiHsm {
     fn hart_suspend(&self, suspend_type: u32, _resume_addr: usize, _opaque: usize) -> SbiRet {
         use rustsbi::spec::hsm::suspend_type::{NON_RETENTIVE, RETENTIVE};
         if matches!(suspend_type, NON_RETENTIVE | RETENTIVE) {
-            local_hsm().suspend();
             unsafe {
                 BOARD.sbi.ipi.as_ref().unwrap().clear_msip(current_hartid());
             }
             unsafe {
                 riscv::register::mie::set_msoft();
             }
+            local_hsm().suspend();
             riscv::asm::wfi();
+            crate::trap::msoft_ipi_handler();
             local_hsm().resume();
             SbiRet::success(0)
         } else {

prototyper/src/sbi/ipi.rs

@@ -167,10 +167,10 @@ impl<T: IpiDevice> SbiIpi<T> {
             }
 
             if let Some(remote) = rfence::remote_rfence(hart_id) {
-                remote.set(ctx);
                 if let Some(local) = rfence::local_rfence() {
                     local.add();
                 }
+                remote.set(ctx);
                 if hart_id != current_hart {
                     let old_ipi_type = set_ipi_type(hart_id, IPI_TYPE_FENCE);
                     if old_ipi_type == 0 {