diff --git a/hw/ppce500_mpc8544ds.c b/hw/ppce500_mpc8544ds.c
index 61151d886c..8095516f43 100644
--- a/hw/ppce500_mpc8544ds.c
+++ b/hw/ppce500_mpc8544ds.c
@@ -174,7 +174,7 @@ out:
 /* Create -kernel TLB entries for BookE, linearly spanning 256MB.  */
 static inline target_phys_addr_t booke206_page_size_to_tlb(uint64_t size)
 {
-    return (ffs(size >> 10) - 1) >> 1;
+    return ffs(size >> 10) - 1;
 }
 
 static void mmubooke_create_initial_mapping(CPUState *env,
diff --git a/target-ppc/cpu.h b/target-ppc/cpu.h
index 5200e6e8c6..32706dff7a 100644
--- a/target-ppc/cpu.h
+++ b/target-ppc/cpu.h
@@ -667,8 +667,8 @@ enum {
 #define MAS0_ATSEL_TLB     0
 #define MAS0_ATSEL_LRAT    MAS0_ATSEL
 
-#define MAS1_TSIZE_SHIFT   8
-#define MAS1_TSIZE_MASK    (0xf << MAS1_TSIZE_SHIFT)
+#define MAS1_TSIZE_SHIFT   7
+#define MAS1_TSIZE_MASK    (0x1f << MAS1_TSIZE_SHIFT)
 
 #define MAS1_TS_SHIFT      12
 #define MAS1_TS            (1 << MAS1_TS_SHIFT)
diff --git a/target-ppc/helper.c b/target-ppc/helper.c
index 4b3731e88a..6339be3a75 100644
--- a/target-ppc/helper.c
+++ b/target-ppc/helper.c
@@ -1293,7 +1293,7 @@ target_phys_addr_t booke206_tlb_to_page_size(CPUState *env, ppcmas_tlb_t *tlb)
 {
     uint32_t tlbncfg;
     int tlbn = booke206_tlbm_to_tlbn(env, tlb);
-    target_phys_addr_t tlbm_size;
+    int tlbm_size;
 
     tlbncfg = env->spr[SPR_BOOKE_TLB0CFG + tlbn];
 
@@ -1301,9 +1301,10 @@ target_phys_addr_t booke206_tlb_to_page_size(CPUState *env, ppcmas_tlb_t *tlb)
         tlbm_size = (tlb->mas1 & MAS1_TSIZE_MASK) >> MAS1_TSIZE_SHIFT;
     } else {
         tlbm_size = (tlbncfg & TLBnCFG_MINSIZE) >> TLBnCFG_MINSIZE_SHIFT;
+        tlbm_size <<= 1;
     }
 
-    return (1 << (tlbm_size << 1)) << 10;
+    return 1024ULL << tlbm_size;
 }
 
 /* TLB check function for MAS based SoftTLBs */