sim: invert sim_state storage

Currently all ports have to declare sim_state themselves in their
sim-main.h and then embed the common sim_state_base & sim_cpu in it.
This dynamic makes it impossible to share common object code among
multiple ports because the core data structure is always different.

Let's invert this relationship: common code declares sim_state, and
if the port actually needs state on a per-instance basis, it can use
the new arch_data field for it.  Most ports don't actually use it,
so they don't need to declare anything at all.

This is the first in a series of changes: it adds a define to select
between the old & new layouts, then converts all the ports that don't
need custom state over to the new layout.

1 files changed, 2 insertions, 12 deletions

diff --git a/sim/v850/sim-main.h b/sim/v850/sim-main.h
index 6556273..6dc5c44 100644
--- a/sim/v850/sim-main.h
+++ b/sim/v850/sim-main.h
@@ -1,6 +1,8 @@
 #ifndef SIM_MAIN_H
 #define SIM_MAIN_H
 
+#define SIM_HAVE_COMMON_SIM_STATE
+
 /* The v850 has 32bit words, numbered 31 (MSB) to 0 (LSB) */
 
 #define WITH_TARGET_WORD_MSB 31
@@ -48,18 +50,6 @@ struct _sim_cpu
   sim_cpu_base base;
 };
 
-struct sim_state {
-  sim_cpu *cpu[MAX_NR_PROCESSORS];
-#if 0
-  SIM_ADDR rom_size;
-  SIM_ADDR low_end;
-  SIM_ADDR high_start;
-  SIM_ADDR high_base;
-  void *mem;
-#endif
-  sim_state_base base;
-};
-
 /* For compatibility, until all functions converted to passing
    SIM_DESC as an argument */
 extern SIM_DESC simulator;