target/ppc: Remove type argument from mmubooke206_check_tlb

We can now use MMU_INST_FETCH from access_type for this.
Unify the I/D code paths, making use of prot_for_access_type.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20210518201146.794854-15-richard.henderson@linaro.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

target/ppc/mmu_helper.c

@@ -944,10 +944,8 @@ static bool mmubooke206_get_as(CPUPPCState *env,
 static int mmubooke206_check_tlb(CPUPPCState *env, ppcmas_tlb_t *tlb,
                                  hwaddr *raddr, int *prot,
                                  target_ulong address,
-                                 MMUAccessType access_type,
-                                 int type, int mmu_idx)
+                                 MMUAccessType access_type, int mmu_idx)
 {
-    int ret;
     int prot2 = 0;
     uint32_t epid;
     bool as, pr;
@@ -1004,39 +1002,25 @@ static int mmubooke206_check_tlb(CPUPPCState *env, ppcmas_tlb_t *tlb,
     }
 
     /* Check the address space and permissions */
-    if (type == ACCESS_CODE) {
+    if (access_type == MMU_INST_FETCH) {
         /* There is no way to fetch code using epid load */
         assert(!use_epid);
-        if (msr_ir != ((tlb->mas1 & MAS1_TS) >> MAS1_TS_SHIFT)) {
-            LOG_SWTLB("%s: AS doesn't match\n", __func__);
-            return -1;
-        }
-
-        *prot = prot2;
-        if (prot2 & PAGE_EXEC) {
-            LOG_SWTLB("%s: good TLB!\n", __func__);
-            return 0;
-        }
-
-        LOG_SWTLB("%s: no PAGE_EXEC: %x\n", __func__, prot2);
-        ret = -3;
-    } else {
-        if (as != ((tlb->mas1 & MAS1_TS) >> MAS1_TS_SHIFT)) {
-            LOG_SWTLB("%s: AS doesn't match\n", __func__);
-            return -1;
-        }
+        as = msr_ir;
+    }
 
-        *prot = prot2;
-        if (prot2 & (access_type == MMU_DATA_LOAD ? PAGE_READ : PAGE_WRITE)) {
-            LOG_SWTLB("%s: found TLB!\n", __func__);
-            return 0;
-        }
+    if (as != ((tlb->mas1 & MAS1_TS) >> MAS1_TS_SHIFT)) {
+        LOG_SWTLB("%s: AS doesn't match\n", __func__);
+        return -1;
+    }
 
-        LOG_SWTLB("%s: PAGE_READ/WRITE doesn't match: %x\n", __func__, prot2);
-        ret = -2;
+    *prot = prot2;
+    if (prot2 & prot_for_access_type(access_type)) {
+        LOG_SWTLB("%s: good TLB!\n", __func__);
+        return 0;
     }
 
-    return ret;
+    LOG_SWTLB("%s: no prot match: %x\n", __func__, prot2);
+    return access_type == MMU_INST_FETCH ? -3 : -2;
 }
 
 static int mmubooke206_get_physical_address(CPUPPCState *env, mmu_ctx_t *ctx,
@@ -1060,7 +1044,7 @@ static int mmubooke206_get_physical_address(CPUPPCState *env, mmu_ctx_t *ctx,
                 continue;
             }
             ret = mmubooke206_check_tlb(env, tlb, &raddr, &ctx->prot, address,
-                                        access_type, type, mmu_idx);
+                                        access_type, mmu_idx);
             if (ret != -1) {
                 goto found_tlb;
             }