target/nios2: Use hw/registerfields.h for CR_TLBADDR fields

Use FIELD_EX32 and FIELD_DP32 instead of manual manipulation
of the fields.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220421151735.31996-27-richard.henderson@linaro.org>

4 files changed, 16 insertions, 15 deletions

diff --git a/target/nios2/cpu.h b/target/nios2/cpu.h
index f8cd5dc218..a6811ff7ea 100644
--- a/target/nios2/cpu.h
+++ b/target/nios2/cpu.h
@@ -110,10 +110,10 @@ FIELD(CR_EXCEPTION, CAUSE, 2, 5)
 FIELD(CR_EXCEPTION, ECCFTL, 31, 1)
 
 #define CR_PTEADDR       8
-#define   CR_PTEADDR_PTBASE_SHIFT 22
-#define   CR_PTEADDR_PTBASE_MASK  (0x3FF << CR_PTEADDR_PTBASE_SHIFT)
-#define   CR_PTEADDR_VPN_SHIFT    2
-#define   CR_PTEADDR_VPN_MASK     (0xFFFFF << CR_PTEADDR_VPN_SHIFT)
+
+FIELD(CR_PTEADDR, VPN, 2, 20)
+FIELD(CR_PTEADDR, PTBASE, 22, 10)
+
 #define CR_TLBACC        9
 #define   CR_TLBACC_IGN_SHIFT 25
 #define   CR_TLBACC_IGN_MASK  (0x7F << CR_TLBACC_IGN_SHIFT)
diff --git a/target/nios2/helper.c b/target/nios2/helper.c
index b30740824c..c2d0afe1b6 100644
--- a/target/nios2/helper.c
+++ b/target/nios2/helper.c
@@ -286,8 +286,8 @@ bool nios2_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
     } else {
         env->ctrl[CR_TLBMISC] |= CR_TLBMISC_D;
     }
-    env->ctrl[CR_PTEADDR] &= CR_PTEADDR_PTBASE_MASK;
-    env->ctrl[CR_PTEADDR] |= (address >> 10) & CR_PTEADDR_VPN_MASK;
+    env->ctrl[CR_PTEADDR] = FIELD_DP32(env->ctrl[CR_PTEADDR], CR_PTEADDR, VPN,
+                                       address >> TARGET_PAGE_BITS);
     env->mmu.pteaddr_wr = env->ctrl[CR_PTEADDR];
 
     cs->exception_index = excp;
diff --git a/target/nios2/mmu.c b/target/nios2/mmu.c
index 95900724e8..75afc56daf 100644
--- a/target/nios2/mmu.c
+++ b/target/nios2/mmu.c
@@ -97,7 +97,7 @@ 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->ctrl[CR_TLBMISC] & CR_TLBMISC_WR) {
         int way = (env->ctrl[CR_TLBMISC] >> CR_TLBMISC_WAY_SHIFT);
-        int vpn = (env->mmu.pteaddr_wr & CR_PTEADDR_VPN_MASK) >> 2;
+        int vpn = FIELD_EX32(env->mmu.pteaddr_wr, CR_PTEADDR, VPN);
         int pid = (env->mmu.tlbmisc_wr & CR_TLBMISC_PID_MASK) >> 4;
         int g = (v & CR_TLBACC_G) ? 1 : 0;
         int valid = ((vpn & CR_TLBACC_PFN_MASK) < 0xC0000) ? 1 : 0;
@@ -148,7 +148,7 @@ void helper_mmu_write_tlbmisc(CPUNios2State *env, uint32_t v)
     /* 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 = (env->mmu.pteaddr_wr & CR_PTEADDR_VPN_MASK) >> 2;
+        int vpn = FIELD_EX32(env->mmu.pteaddr_wr, CR_PTEADDR, VPN);
         Nios2TLBEntry *entry =
             &env->mmu.tlb[(way * cpu->tlb_num_ways) +
                           (vpn & env->mmu.tlb_entry_mask)];
@@ -160,8 +160,9 @@ void helper_mmu_write_tlbmisc(CPUNios2State *env, uint32_t v)
             (v & ~CR_TLBMISC_PID_MASK) |
             ((entry->tag & ((1 << cpu->pid_num_bits) - 1)) <<
              CR_TLBMISC_PID_SHIFT);
-        env->ctrl[CR_PTEADDR] &= ~CR_PTEADDR_VPN_MASK;
-        env->ctrl[CR_PTEADDR] |= (entry->tag >> 12) << CR_PTEADDR_VPN_SHIFT;
+        env->ctrl[CR_PTEADDR] = FIELD_DP32(env->ctrl[CR_PTEADDR],
+                                           CR_PTEADDR, VPN,
+                                           entry->tag >> TARGET_PAGE_BITS);
     } else {
         env->ctrl[CR_TLBMISC] = v;
     }
@@ -171,12 +172,12 @@ void helper_mmu_write_tlbmisc(CPUNios2State *env, uint32_t v)
 
 void helper_mmu_write_pteaddr(CPUNios2State *env, uint32_t v)
 {
-    trace_nios2_mmu_write_pteaddr(v >> CR_PTEADDR_PTBASE_SHIFT,
-                                  (v & CR_PTEADDR_VPN_MASK) >> CR_PTEADDR_VPN_SHIFT);
+    trace_nios2_mmu_write_pteaddr(FIELD_EX32(v, CR_PTEADDR, PTBASE),
+                                  FIELD_EX32(v, CR_PTEADDR, VPN));
 
     /* Writes to PTEADDR don't change the read-back VPN value */
-    env->ctrl[CR_PTEADDR] = ((v & ~CR_PTEADDR_VPN_MASK) |
-                             (env->ctrl[CR_PTEADDR] & CR_PTEADDR_VPN_MASK));
+    env->ctrl[CR_PTEADDR] = ((v & ~R_CR_PTEADDR_VPN_MASK) |
+                             (env->ctrl[CR_PTEADDR] & R_CR_PTEADDR_VPN_MASK));
     env->mmu.pteaddr_wr = v;
 }
 
diff --git a/target/nios2/translate.c b/target/nios2/translate.c
index fc49a7101f..baa22c5101 100644
--- a/target/nios2/translate.c
+++ b/target/nios2/translate.c
@@ -924,7 +924,7 @@ 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 & CR_PTEADDR_VPN_MASK,
+                 env->mmu.pteaddr_wr & R_CR_PTEADDR_VPN_MASK,
                  (env->mmu.tlbmisc_wr & CR_TLBMISC_PID_MASK) >> 4,
                  env->mmu.tlbacc_wr);
 #endif