target/mips: Access MemoryRegion with MemOp

The memory_region_dispatch_{read|write} operand "unsigned size" is
being converted into a "MemOp op".

Convert interfaces by using no-op size_memop.

After all interfaces are converted, size_memop will be implemented
and the memory_region_dispatch_{read|write} operand "unsigned size"
will be converted into a "MemOp op".

As size_memop is a no-op, this patch does not change any behaviour.

Signed-off-by: Tony Nguyen <[email protected]>
Reviewed-by: Philippe Mathieu-Daudé <[email protected]>
Reviewed-by: Richard Henderson <[email protected]>
Reviewed-by: Aleksandar Markovic <[email protected]>
Message-Id: <af407f0a34dc95ef5aaf2c00dffda7c65df23c3a.1566466906.git.tony.nguyen@bt.com>
Signed-off-by: Richard Henderson <[email protected]>

target/mips/op_helper.c

@@ -24,6 +24,7 @@
 #include "exec/helper-proto.h"
 #include "exec/exec-all.h"
 #include "exec/cpu_ldst.h"
+#include "exec/memop.h"
 #include "sysemu/kvm.h"
 #include "fpu/softfloat.h"
 
@@ -4741,11 +4742,11 @@ void helper_cache(CPUMIPSState *env, target_ulong addr, uint32_t op)
     if (op == 9) {
         /* Index Store Tag */
         memory_region_dispatch_write(env->itc_tag, index, env->CP0_TagLo,
-                                     8, MEMTXATTRS_UNSPECIFIED);
+                                     size_memop(8), MEMTXATTRS_UNSPECIFIED);
     } else if (op == 5) {
         /* Index Load Tag */
         memory_region_dispatch_read(env->itc_tag, index, &env->CP0_TagLo,
-                                    8, MEMTXATTRS_UNSPECIFIED);
+                                    size_memop(8), MEMTXATTRS_UNSPECIFIED);
     }
 #endif
 }