ppc: Move load and store helpers, switch to AREG0 free mode

Add an explicit CPUPPCState parameter instead of relying on AREG0
and rename op_helper.c (which only contains load and store helpers)
to mem_helper.c. Remove AREG0 swapping in
tlb_fill().

Switch to AREG0 free mode. Use cpu_ld{l,uw}_code in translation
and interrupt handling, cpu_{ld,st}{l,uw}_data in loads and stores.

Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Alexander Graf <agraf@suse.de>
diff --git a/cpu-all.h b/cpu-all.h
index 50c8b62..9dc249a 100644
--- a/cpu-all.h
+++ b/cpu-all.h
@@ -291,6 +291,15 @@
 #define stfl_kernel(p, v) stfl_raw(p, v)
 #define stfq_kernel(p, vt) stfq_raw(p, v)
 
+#ifdef CONFIG_TCG_PASS_AREG0
+#define cpu_ldub_data(env, addr) ldub_raw(addr)
+#define cpu_lduw_data(env, addr) lduw_raw(addr)
+#define cpu_ldl_data(env, addr) ldl_raw(addr)
+
+#define cpu_stb_data(env, addr, data) stb_raw(addr, data)
+#define cpu_stw_data(env, addr, data) stw_raw(addr, data)
+#define cpu_stl_data(env, addr, data) stl_raw(addr, data)
+#endif
 #endif /* defined(CONFIG_USER_ONLY) */
 
 /* page related stuff */