1 files changed, 35 insertions, 23 deletions

diff --git a/memory.c b/memory.c
index a23ff3cc2a..61a254c3f9 100644
--- a/memory.c
+++ b/memory.c
@@ -351,32 +351,23 @@ static bool memory_region_big_endian(MemoryRegion *mr)
 #endif
 }
 
-static bool memory_region_wrong_endianness(MemoryRegion *mr)
+static void adjust_endianness(MemoryRegion *mr, uint64_t *data, MemOp op)
 {
-#ifdef TARGET_WORDS_BIGENDIAN
-    return mr->ops->endianness == DEVICE_LITTLE_ENDIAN;
-#else
-    return mr->ops->endianness == DEVICE_BIG_ENDIAN;
-#endif
-}
-
-static void adjust_endianness(MemoryRegion *mr, uint64_t *data, unsigned size)
-{
-    if (memory_region_wrong_endianness(mr)) {
-        switch (size) {
-        case 1:
+    if ((op & MO_BSWAP) != devend_memop(mr->ops->endianness)) {
+        switch (op & MO_SIZE) {
+        case MO_8:
             break;
-        case 2:
+        case MO_16:
             *data = bswap16(*data);
             break;
-        case 4:
+        case MO_32:
             *data = bswap32(*data);
             break;
-        case 8:
+        case MO_64:
             *data = bswap64(*data);
             break;
         default:
-            abort();
+            g_assert_not_reached();
         }
     }
 }
@@ -1446,9 +1437,10 @@ static MemTxResult memory_region_dispatch_read1(MemoryRegion *mr,
 MemTxResult memory_region_dispatch_read(MemoryRegion *mr,
                                         hwaddr addr,
                                         uint64_t *pval,
-                                        unsigned size,
+                                        MemOp op,
                                         MemTxAttrs attrs)
 {
+    unsigned size = memop_size(op);
     MemTxResult r;
 
     if (!memory_region_access_valid(mr, addr, size, false, attrs)) {
@@ -1457,7 +1449,7 @@ MemTxResult memory_region_dispatch_read(MemoryRegion *mr,
     }
 
     r = memory_region_dispatch_read1(mr, addr, pval, size, attrs);
-    adjust_endianness(mr, pval, size);
+    adjust_endianness(mr, pval, op);
     return r;
 }
 
@@ -1490,15 +1482,17 @@ static bool memory_region_dispatch_write_eventfds(MemoryRegion *mr,
 MemTxResult memory_region_dispatch_write(MemoryRegion *mr,
                                          hwaddr addr,
                                          uint64_t data,
-                                         unsigned size,
+                                         MemOp op,
                                          MemTxAttrs attrs)
 {
+    unsigned size = memop_size(op);
+
     if (!memory_region_access_valid(mr, addr, size, true, attrs)) {
         unassigned_mem_write(mr, addr, data, size);
         return MEMTX_DECODE_ERROR;
     }
 
-    adjust_endianness(mr, &data, size);
+    adjust_endianness(mr, &data, op);
 
     if ((!kvm_eventfds_enabled()) &&
         memory_region_dispatch_write_eventfds(mr, addr, data, size, attrs)) {
@@ -2338,7 +2332,7 @@ void memory_region_add_eventfd(MemoryRegion *mr,
     }
 
     if (size) {
-        adjust_endianness(mr, &mrfd.data, size);
+        adjust_endianness(mr, &mrfd.data, size_memop(size) | MO_TE);
     }
     memory_region_transaction_begin();
     for (i = 0; i < mr->ioeventfd_nb; ++i) {
@@ -2373,7 +2367,7 @@ void memory_region_del_eventfd(MemoryRegion *mr,
     unsigned i;
 
     if (size) {
-        adjust_endianness(mr, &mrfd.data, size);
+        adjust_endianness(mr, &mrfd.data, size_memop(size) | MO_TE);
     }
     memory_region_transaction_begin();
     for (i = 0; i < mr->ioeventfd_nb; ++i) {
@@ -3273,3 +3267,21 @@ static void memory_register_types(void)
 }
 
 type_init(memory_register_types)
+
+MemOp devend_memop(enum device_endian end)
+{
+    static MemOp conv[] = {
+        [DEVICE_LITTLE_ENDIAN] = MO_LE,
+        [DEVICE_BIG_ENDIAN] = MO_BE,
+        [DEVICE_NATIVE_ENDIAN] = MO_TE,
+        [DEVICE_HOST_ENDIAN] = 0,
+    };
+    switch (end) {
+    case DEVICE_LITTLE_ENDIAN:
+    case DEVICE_BIG_ENDIAN:
+    case DEVICE_NATIVE_ENDIAN:
+        return conv[end];
+    default:
+        g_assert_not_reached();
+    }
+}