Add is_special_access() to xlate_flags_t

riscv/mmu.cc

@@ -201,7 +201,7 @@ void mmu_t::check_triggers(triggers::operation_t operation, reg_t address, std::
 void mmu_t::load_slow_path_intrapage(reg_t addr, reg_t len, uint8_t* bytes, xlate_flags_t xlate_flags)
 {
   reg_t vpn = addr >> PGSHIFT;
-  if (!(xlate_flags.hlvx || xlate_flags.forced_virt || xlate_flags.lr) && vpn == (tlb_load_tag[vpn % TLB_ENTRIES] & ~TLB_CHECK_TRIGGERS)) {
+  if (!xlate_flags.is_special_access() && vpn == (tlb_load_tag[vpn % TLB_ENTRIES] & ~TLB_CHECK_TRIGGERS)) {
     auto host_addr = tlb_data[vpn % TLB_ENTRIES].host_offset + addr;
     memcpy(bytes, host_addr, len);
     return;
@@ -217,7 +217,7 @@ void mmu_t::load_slow_path_intrapage(reg_t addr, reg_t len, uint8_t* bytes, xlat
     memcpy(bytes, host_addr, len);
     if (tracer.interested_in_range(paddr, paddr + PGSIZE, LOAD))
       tracer.trace(paddr, len, LOAD);
-    else if (!(xlate_flags.hlvx || xlate_flags.forced_virt || xlate_flags.lr))
+    else if (!xlate_flags.is_special_access())
       refill_tlb(addr, paddr, host_addr, LOAD);
 
   } else if (!mmio_load(paddr, len, bytes)) {
@@ -255,7 +255,7 @@ void mmu_t::load_slow_path(reg_t addr, reg_t len, uint8_t* bytes, xlate_flags_t
 void mmu_t::store_slow_path_intrapage(reg_t addr, reg_t len, const uint8_t* bytes, xlate_flags_t xlate_flags, bool actually_store)
 {
   reg_t vpn = addr >> PGSHIFT;
-  if (!(xlate_flags.hlvx || xlate_flags.forced_virt || xlate_flags.lr) && vpn == (tlb_store_tag[vpn % TLB_ENTRIES] & ~TLB_CHECK_TRIGGERS)) {
+  if (!xlate_flags.is_special_access() && vpn == (tlb_store_tag[vpn % TLB_ENTRIES] & ~TLB_CHECK_TRIGGERS)) {
     if (actually_store) {
       auto host_addr = tlb_data[vpn % TLB_ENTRIES].host_offset + addr;
       memcpy(host_addr, bytes, len);
@@ -270,7 +270,7 @@ void mmu_t::store_slow_path_intrapage(reg_t addr, reg_t len, const uint8_t* byte
       memcpy(host_addr, bytes, len);
       if (tracer.interested_in_range(paddr, paddr + PGSIZE, STORE))
         tracer.trace(paddr, len, STORE);
-      else if (!(xlate_flags.hlvx || xlate_flags.forced_virt || xlate_flags.lr))
+      else if (!xlate_flags.is_special_access())
         refill_tlb(addr, paddr, host_addr, STORE);
     } else if (!mmio_store(paddr, len, bytes)) {
       throw trap_store_access_fault((proc) ? proc->state.v : false, addr, 0, 0);

riscv/mmu.h

@@ -42,6 +42,10 @@ struct xlate_flags_t {
   const bool forced_virt : 1;
   const bool hlvx : 1;
   const bool lr : 1;
+
+  bool is_special_access() const {
+    return forced_virt || hlvx || lr;
+  }
 };
 
 void throw_access_exception(bool virt, reg_t addr, access_type type);
@@ -64,7 +68,7 @@ public:
     bool aligned = (addr & (sizeof(T) - 1)) == 0;
     bool tlb_hit = tlb_load_tag[vpn % TLB_ENTRIES] == vpn;
 
-    if (likely(!(xlate_flags.hlvx || xlate_flags.forced_virt || xlate_flags.lr) && aligned && tlb_hit)) {
+    if (likely(!xlate_flags.is_special_access() && aligned && tlb_hit)) {
       res = *(target_endian<T>*)(tlb_data[vpn % TLB_ENTRIES].host_offset + addr);
     } else {
       load_slow_path(addr, sizeof(T), (uint8_t*)&res, xlate_flags);
@@ -106,7 +110,7 @@ public:
     bool aligned = (addr & (sizeof(T) - 1)) == 0;
     bool tlb_hit = tlb_store_tag[vpn % TLB_ENTRIES] == vpn;
 
-    if (!(xlate_flags.hlvx || xlate_flags.forced_virt || xlate_flags.lr) && likely(aligned && tlb_hit)) {
+    if (!xlate_flags.is_special_access() && likely(aligned && tlb_hit)) {
       *(target_endian<T>*)(tlb_data[vpn % TLB_ENTRIES].host_offset + addr) = to_target(val);
     } else {
       target_endian<T> target_val = to_target(val);