target/ppc: Introduce an mmu_is_64bit() helper

Callers don't really need to know how 64-bit MMU model enums are
computed. Hide this in a helper.

Signed-off-by: Greg Kurz <groug@kaod.org>
Message-Id: <20201209173536.1437351-3-groug@kaod.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
diff --git a/target/ppc/mmu_helper.c b/target/ppc/mmu_helper.c
index 9f22b66..ca88658 100644
--- a/target/ppc/mmu_helper.c
+++ b/target/ppc/mmu_helper.c
@@ -2002,7 +2002,7 @@
 void ppc_tlb_invalidate_all(CPUPPCState *env)
 {
 #if defined(TARGET_PPC64)
-    if (env->mmu_model & POWERPC_MMU_64) {
+    if (mmu_is_64bit(env->mmu_model)) {
         env->tlb_need_flush = 0;
         tlb_flush(env_cpu(env));
     } else
@@ -2046,7 +2046,7 @@
 #if !defined(FLUSH_ALL_TLBS)
     addr &= TARGET_PAGE_MASK;
 #if defined(TARGET_PPC64)
-    if (env->mmu_model & POWERPC_MMU_64) {
+    if (mmu_is_64bit(env->mmu_model)) {
         /* tlbie invalidate TLBs for all segments */
         /*
          * XXX: given the fact that there are too many segments to invalidate,
@@ -2091,7 +2091,7 @@
     qemu_log_mask(CPU_LOG_MMU, "%s: " TARGET_FMT_lx "\n", __func__, value);
     assert(!cpu->vhyp);
 #if defined(TARGET_PPC64)
-    if (env->mmu_model & POWERPC_MMU_64) {
+    if (mmu_is_64bit(env->mmu_model)) {
         target_ulong sdr_mask = SDR_64_HTABORG | SDR_64_HTABSIZE;
         target_ulong htabsize = value & SDR_64_HTABSIZE;
 
@@ -2144,7 +2144,7 @@
 target_ulong helper_load_sr(CPUPPCState *env, target_ulong sr_num)
 {
 #if defined(TARGET_PPC64)
-    if (env->mmu_model & POWERPC_MMU_64) {
+    if (mmu_is_64bit(env->mmu_model)) {
         /* XXX */
         return 0;
     }
@@ -2158,7 +2158,7 @@
             "%s: reg=%d " TARGET_FMT_lx " " TARGET_FMT_lx "\n", __func__,
             (int)srnum, value, env->sr[srnum]);
 #if defined(TARGET_PPC64)
-    if (env->mmu_model & POWERPC_MMU_64) {
+    if (mmu_is_64bit(env->mmu_model)) {
         PowerPCCPU *cpu = env_archcpu(env);
         uint64_t esid, vsid;