[PATCH 20/24] target/ppc: Remove ppc_hash32_pp_prot() and reuse common function

[BALATON Zoltan]

The ppc_hash32_pp_prot() function in mmu-hash32.c is the same as
pp_check() in mmu_common.c. Rename the latter to ppc_pte_prot() and
merge with ppc_hash32_pp_prot() to remove duplicated code.

Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
---
 target/ppc/internal.h   |  2 +-
 target/ppc/mmu-hash32.c | 47 +----------------------------------------
 target/ppc/mmu_common.c | 19 +++++++++--------
 3 files changed, 12 insertions(+), 56 deletions(-)

diff --git a/target/ppc/internal.h b/target/ppc/internal.h
index b835b2cba0..2d95d406f6 100644
--- a/target/ppc/internal.h
+++ b/target/ppc/internal.h
@@ -254,7 +254,7 @@ static inline int prot_for_access_type(MMUAccessType 
access_type)
 #ifndef CONFIG_USER_ONLY
 
 /* PowerPC MMU emulation */
-
+int ppc_pte_prot(int key, int pp, int nx);
 bool ppc_xlate(PowerPCCPU *cpu, vaddr eaddr, MMUAccessType access_type,
                       hwaddr *raddrp, int *psizep, int *protp,
                       int mmu_idx, bool guest_visible);
diff --git a/target/ppc/mmu-hash32.c b/target/ppc/mmu-hash32.c
index 3976416840..ee9df351ae 100644
--- a/target/ppc/mmu-hash32.c
+++ b/target/ppc/mmu-hash32.c
@@ -42,51 +42,6 @@ struct mmu_ctx_hash32 {
     int key;                       /* Access key                */
 };
 
-static int ppc_hash32_pp_prot(int key, int pp, int nx)
-{
-    int prot;
-
-    if (key == 0) {
-        switch (pp) {
-        case 0x0:
-        case 0x1:
-        case 0x2:
-            prot = PAGE_READ | PAGE_WRITE;
-            break;
-
-        case 0x3:
-            prot = PAGE_READ;
-            break;
-
-        default:
-            abort();
-        }
-    } else {
-        switch (pp) {
-        case 0x0:
-            prot = 0;
-            break;
-
-        case 0x1:
-        case 0x3:
-            prot = PAGE_READ;
-            break;
-
-        case 0x2:
-            prot = PAGE_READ | PAGE_WRITE;
-            break;
-
-        default:
-            abort();
-        }
-    }
-    if (nx == 0) {
-        prot |= PAGE_EXEC;
-    }
-
-    return prot;
-}
-
 static int ppc_hash32_pte_prot(int mmu_idx,
                                target_ulong sr, ppc_hash_pte32_t pte)
 {
@@ -95,7 +50,7 @@ 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_pte_prot(key, pp, !!(sr & SR32_NX));
 }
 
 static target_ulong hash32_bat_size(int mmu_idx,
diff --git a/target/ppc/mmu_common.c b/target/ppc/mmu_common.c
index 244830c196..ca1cbba0f0 100644
--- a/target/ppc/mmu_common.c
+++ b/target/ppc/mmu_common.c
@@ -75,22 +75,23 @@ void ppc_store_sdr1(CPUPPCState *env, target_ulong value)
 /*****************************************************************************/
 /* PowerPC MMU emulation */
 
-static int pp_check(int key, int pp, int nx)
+int ppc_pte_prot(int key, int pp, int nx)
 {
     int access;
 
     /* Compute access rights */
-    access = 0;
     if (key == 0) {
         switch (pp) {
         case 0x0:
         case 0x1:
         case 0x2:
-            access |= PAGE_WRITE;
-            /* fall through */
+            access = PAGE_READ | PAGE_WRITE;
+            break;
         case 0x3:
-            access |= PAGE_READ;
+            access = PAGE_READ;
             break;
+        default:
+            g_assert_not_reached();
         }
     } else {
         switch (pp) {
@@ -104,6 +105,8 @@ static int pp_check(int key, int pp, int nx)
         case 0x2:
             access = PAGE_READ | PAGE_WRITE;
             break;
+        default:
+            g_assert_not_reached();
         }
     }
     if (nx == 0) {
@@ -140,7 +143,7 @@ static int ppc6xx_tlb_pte_check(mmu_ctx_t *ctx, 
target_ulong pte0,
                                 MMUAccessType access_type)
 {
     target_ulong ptem, mmask;
-    int access, ret, pteh, ptev, pp;
+    int ret, pteh, ptev, pp;
 
     ret = -1;
     /* Check validity and table match */
@@ -159,11 +162,9 @@ static int ppc6xx_tlb_pte_check(mmu_ctx_t *ctx, 
target_ulong pte0,
                     return -3;
                 }
             }
-            /* Compute access rights */
-            access = pp_check(ctx->key, pp, ctx->nx);
             /* Keep the matching PTE information */
             ctx->raddr = pte1;
-            ctx->prot = access;
+            ctx->prot = ppc_pte_prot(ctx->key, pp, ctx->nx);
             ret = check_prot(ctx->prot, access_type);
             if (ret == 0) {
                 /* Access granted */
-- 
2.30.9