target/ppc: Reorganise and rename ppc_hash32_pp_prot()

Reorganise ppc_hash32_pp_prot() swapping the if legs so it does not
test for negative first and clean up to make it shorter. Also rename
it to ppc_hash32_prot().

Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>

3 files changed, 15 insertions, 24 deletions

diff --git a/target/ppc/mmu-hash32.c b/target/ppc/mmu-hash32.c
index d5f2057eb1..8a446c8a7d 100644
--- a/target/ppc/mmu-hash32.c
+++ b/target/ppc/mmu-hash32.c
@@ -45,7 +45,7 @@ static int ppc_hash32_pte_prot(int mmu_idx,
     key = !!(mmuidx_pr(mmu_idx) ? (sr & SR32_KP) : (sr & SR32_KS));
     pp = pte.pte1 & HPTE32_R_PP;
 
-    return ppc_hash32_pp_prot(key, pp, !!(sr & SR32_NX));
+    return ppc_hash32_prot(key, pp, !!(sr & SR32_NX));
 }
 
 static target_ulong hash32_bat_size(int mmu_idx,
diff --git a/target/ppc/mmu-hash32.h b/target/ppc/mmu-hash32.h
index f0ce6951b4..bc4eedbecc 100644
--- a/target/ppc/mmu-hash32.h
+++ b/target/ppc/mmu-hash32.h
@@ -102,49 +102,40 @@ static inline void ppc_hash32_store_hpte1(PowerPCCPU *cpu,
     stl_phys(CPU(cpu)->as, base + pte_offset + HASH_PTE_SIZE_32 / 2, pte1);
 }
 
-static inline int ppc_hash32_pp_prot(bool key, int pp, bool nx)
+static inline int ppc_hash32_prot(bool key, int pp, bool nx)
 {
     int prot;
 
-    if (key == 0) {
+    if (key) {
         switch (pp) {
         case 0x0:
-        case 0x1:
-        case 0x2:
-            prot = PAGE_READ | PAGE_WRITE;
+            prot = 0;
             break;
-
+        case 0x1:
         case 0x3:
             prot = PAGE_READ;
             break;
-
+        case 0x2:
+            prot = PAGE_READ | PAGE_WRITE;
+            break;
         default:
-            abort();
+            g_assert_not_reached();
         }
     } else {
         switch (pp) {
         case 0x0:
-            prot = 0;
-            break;
-
         case 0x1:
-        case 0x3:
-            prot = PAGE_READ;
-            break;
-
         case 0x2:
             prot = PAGE_READ | PAGE_WRITE;
             break;
-
+        case 0x3:
+            prot = PAGE_READ;
+            break;
         default:
-            abort();
+            g_assert_not_reached();
         }
     }
-    if (nx == 0) {
-        prot |= PAGE_EXEC;
-    }
-
-    return prot;
+    return nx ? prot : prot | PAGE_EXEC;
 }
 
 typedef struct {
diff --git a/target/ppc/mmu_common.c b/target/ppc/mmu_common.c
index e2542694f0..08c5b61f76 100644
--- a/target/ppc/mmu_common.c
+++ b/target/ppc/mmu_common.c
@@ -120,7 +120,7 @@ static int ppc6xx_tlb_pte_check(mmu_ctx_t *ctx, target_ulong pte0,
             }
             /* Keep the matching PTE information */
             ctx->raddr = pte1;
-            ctx->prot = ppc_hash32_pp_prot(ctx->key, pp, ctx->nx);
+            ctx->prot = ppc_hash32_prot(ctx->key, pp, ctx->nx);
             if (check_prot_access_type(ctx->prot, access_type)) {
                 /* Access granted */
                 qemu_log_mask(CPU_LOG_MMU, "PTE access granted !\n");