diff --git a/target/nios2/cpu.h b/target/nios2/cpu.h
index 024ef3ccc0..3857848f7c 100644
--- a/target/nios2/cpu.h
+++ b/target/nios2/cpu.h
@@ -131,16 +131,24 @@ FIELD(CR_TLBACC, IG, 25, 7)
 #define CR_TLBACC_G  (1u << R_CR_TLBACC_G_SHIFT)
 
 #define CR_TLBMISC       10
-#define   CR_TLBMISC_WAY_SHIFT 20
-#define   CR_TLBMISC_WAY_MASK  (0xF << CR_TLBMISC_WAY_SHIFT)
-#define   CR_TLBMISC_RD        (1 << 19)
-#define   CR_TLBMISC_WR        (1 << 18)
-#define   CR_TLBMISC_PID_SHIFT 4
-#define   CR_TLBMISC_PID_MASK  (0x3FFF << CR_TLBMISC_PID_SHIFT)
-#define   CR_TLBMISC_DBL       (1 << 3)
-#define   CR_TLBMISC_BAD       (1 << 2)
-#define   CR_TLBMISC_PERM      (1 << 1)
-#define   CR_TLBMISC_D         (1 << 0)
+
+FIELD(CR_TLBMISC, D, 0, 1)
+FIELD(CR_TLBMISC, PERM, 1, 1)
+FIELD(CR_TLBMISC, BAD, 2, 1)
+FIELD(CR_TLBMISC, DBL, 3, 1)
+FIELD(CR_TLBMISC, PID, 4, 14)
+FIELD(CR_TLBMISC, WR, 18, 1)
+FIELD(CR_TLBMISC, RD, 19, 1)
+FIELD(CR_TLBMISC, WAY, 20, 4)
+FIELD(CR_TLBMISC, EE, 24, 1)
+
+#define CR_TLBMISC_RD    (1u << R_CR_TLBMISC_RD_SHIFT)
+#define CR_TLBMISC_WR    (1u << R_CR_TLBMISC_WR_SHIFT)
+#define CR_TLBMISC_DBL   (1u << R_CR_TLBMISC_DBL_SHIFT)
+#define CR_TLBMISC_BAD   (1u << R_CR_TLBMISC_BAD_SHIFT)
+#define CR_TLBMISC_PERM  (1u << R_CR_TLBMISC_PERM_SHIFT)
+#define CR_TLBMISC_D     (1u << R_CR_TLBMISC_D_SHIFT)
+
 #define CR_ENCINJ        11
 #define CR_BADADDR       12
 #define CR_CONFIG        13
diff --git a/target/nios2/helper.c b/target/nios2/helper.c
index 37fb53dadb..93338e86f0 100644
--- a/target/nios2/helper.c
+++ b/target/nios2/helper.c
@@ -276,11 +276,8 @@ bool nios2_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
         return false;
     }
 
-    if (access_type == MMU_INST_FETCH) {
-        env->tlbmisc &= ~CR_TLBMISC_D;
-    } else {
-        env->tlbmisc |= CR_TLBMISC_D;
-    }
+    env->tlbmisc = FIELD_DP32(env->tlbmisc, CR_TLBMISC, D,
+                              access_type == MMU_INST_FETCH);
     env->pteaddr = FIELD_DP32(env->pteaddr, CR_PTEADDR, VPN,
                               address >> TARGET_PAGE_BITS);
     env->mmu.pteaddr_wr = env->pteaddr;
diff --git a/target/nios2/mmu.c b/target/nios2/mmu.c
index d6221936f7..c8b74b5479 100644
--- a/target/nios2/mmu.c
+++ b/target/nios2/mmu.c
@@ -33,7 +33,7 @@ unsigned int mmu_translate(CPUNios2State *env,
                            target_ulong vaddr, int rw, int mmu_idx)
 {
     Nios2CPU *cpu = env_archcpu(env);
-    int pid = (env->mmu.tlbmisc_wr & CR_TLBMISC_PID_MASK) >> 4;
+    int pid = FIELD_EX32(env->mmu.tlbmisc_wr, CR_TLBMISC, PID);
     int vpn = vaddr >> 12;
     int way, n_ways = cpu->tlb_num_ways;
 
@@ -96,9 +96,9 @@ void helper_mmu_write_tlbacc(CPUNios2State *env, uint32_t v)
 
     /* if tlbmisc.WE == 1 then trigger a TLB write on writes to TLBACC */
     if (env->tlbmisc & CR_TLBMISC_WR) {
-        int way = (env->tlbmisc >> CR_TLBMISC_WAY_SHIFT);
+        int way = FIELD_EX32(env->tlbmisc, CR_TLBMISC, WAY);
         int vpn = FIELD_EX32(env->mmu.pteaddr_wr, CR_PTEADDR, VPN);
-        int pid = (env->mmu.tlbmisc_wr & CR_TLBMISC_PID_MASK) >> 4;
+        int pid = FIELD_EX32(env->mmu.tlbmisc_wr, CR_TLBMISC, PID);
         int g = FIELD_EX32(v, CR_TLBACC, G);
         int valid = FIELD_EX32(vpn, CR_TLBACC, PFN) < 0xC0000;
         Nios2TLBEntry *entry =
@@ -117,10 +117,8 @@ void helper_mmu_write_tlbacc(CPUNios2State *env, uint32_t v)
             entry->data = newData;
         }
         /* Auto-increment tlbmisc.WAY */
-        env->tlbmisc =
-            (env->tlbmisc & ~CR_TLBMISC_WAY_MASK) |
-            (((way + 1) & (cpu->tlb_num_ways - 1)) <<
-             CR_TLBMISC_WAY_SHIFT);
+        env->tlbmisc = FIELD_DP32(env->tlbmisc, CR_TLBMISC, WAY,
+                                  (way + 1) & (cpu->tlb_num_ways - 1));
     }
 
     /* Writes to TLBACC don't change the read-back value */
@@ -130,24 +128,25 @@ void helper_mmu_write_tlbacc(CPUNios2State *env, uint32_t v)
 void helper_mmu_write_tlbmisc(CPUNios2State *env, uint32_t v)
 {
     Nios2CPU *cpu = env_archcpu(env);
+    uint32_t new_pid = FIELD_EX32(v, CR_TLBMISC, PID);
+    uint32_t old_pid = FIELD_EX32(env->mmu.tlbmisc_wr, CR_TLBMISC, PID);
+    uint32_t way = FIELD_EX32(v, CR_TLBMISC, WAY);
 
-    trace_nios2_mmu_write_tlbmisc(v >> CR_TLBMISC_WAY_SHIFT,
+    trace_nios2_mmu_write_tlbmisc(way,
                                   (v & CR_TLBMISC_RD) ? 'R' : '.',
                                   (v & CR_TLBMISC_WR) ? 'W' : '.',
                                   (v & CR_TLBMISC_DBL) ? '2' : '.',
                                   (v & CR_TLBMISC_BAD) ? 'B' : '.',
                                   (v & CR_TLBMISC_PERM) ? 'P' : '.',
                                   (v & CR_TLBMISC_D) ? 'D' : '.',
-                                  (v & CR_TLBMISC_PID_MASK) >> 4);
+                                  new_pid);
 
-    if ((v & CR_TLBMISC_PID_MASK) !=
-        (env->mmu.tlbmisc_wr & CR_TLBMISC_PID_MASK)) {
-        mmu_flush_pid(env, (env->mmu.tlbmisc_wr & CR_TLBMISC_PID_MASK) >>
-                           CR_TLBMISC_PID_SHIFT);
+    if (new_pid != old_pid) {
+        mmu_flush_pid(env, old_pid);
     }
+
     /* if tlbmisc.RD == 1 then trigger a TLB read on writes to TLBMISC */
     if (v & CR_TLBMISC_RD) {
-        int way = (v >> CR_TLBMISC_WAY_SHIFT);
         int vpn = FIELD_EX32(env->mmu.pteaddr_wr, CR_PTEADDR, VPN);
         Nios2TLBEntry *entry =
             &env->mmu.tlb[(way * cpu->tlb_num_ways) +
@@ -156,10 +155,8 @@ void helper_mmu_write_tlbmisc(CPUNios2State *env, uint32_t v)
         env->tlbacc &= R_CR_TLBACC_IG_MASK;
         env->tlbacc |= entry->data;
         env->tlbacc |= (entry->tag & (1 << 11)) ? CR_TLBACC_G : 0;
-        env->tlbmisc =
-            (v & ~CR_TLBMISC_PID_MASK) |
-            ((entry->tag & ((1 << cpu->pid_num_bits) - 1)) <<
-             CR_TLBMISC_PID_SHIFT);
+        env->tlbmisc = FIELD_DP32(v, CR_TLBMISC, PID,
+                                  entry->tag & ((1 << cpu->pid_num_bits) - 1));
         env->pteaddr = FIELD_DP32(env->pteaddr, CR_PTEADDR, VPN,
                                   entry->tag >> TARGET_PAGE_BITS);
     } else {
diff --git a/target/nios2/translate.c b/target/nios2/translate.c
index 3cdef16519..77b3bf05f3 100644
--- a/target/nios2/translate.c
+++ b/target/nios2/translate.c
@@ -910,7 +910,7 @@ void nios2_cpu_dump_state(CPUState *cs, FILE *f, int flags)
     }
     qemu_fprintf(f, " mmu write: VPN=%05X PID %02X TLBACC %08X\n",
                  env->mmu.pteaddr_wr & R_CR_PTEADDR_VPN_MASK,
-                 (env->mmu.tlbmisc_wr & CR_TLBMISC_PID_MASK) >> 4,
+                 FIELD_EX32(env->mmu.tlbmisc_wr, CR_TLBMISC, PID),
                  env->mmu.tlbacc_wr);
 #endif
     qemu_fprintf(f, "\n\n");
