sim: moxie: move arch-specific settings to internal header

There's no need for these settings to be in sim-main.h which is shared
with common/ sim code, so move it all out to a new header which only
this port will include.

sim/moxie/interp.c

diff --git a/sim/moxie/interp.c b/sim/moxie/interp.c
index 74a6fda..144d83c 100644
--- a/sim/moxie/interp.c
+++ b/sim/moxie/interp.c
@@ -37,6 +37,8 @@
 #include "sim-signal.h"
 #include "target-newlib-syscall.h"
 
+#include "moxie-sim.h"
+
 /* Extract the signed 10-bit offset from a 16-bit branch
    instruction.  */
 #define INST2OFFSET(o) ((((signed short)((o & ((1<<10)-1))<<6))>>6)<<1)

sim/moxie/moxie-sim.h

diff --git a/sim/moxie/moxie-sim.h b/sim/moxie/moxie-sim.h
new file mode 100644
index 0000000..761ac32
--- /dev/null
+++ b/sim/moxie/moxie-sim.h
@@ -0,0 +1,34 @@
+/* Moxie Simulator definition.
+   Copyright (C) 2009-2022 Free Software Foundation, Inc.
+   Contributed by Anthony Green <green@moxielogic.com>
+
+This file is part of the GNU simulators.
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#ifndef MOXIE_SIM_H
+#define MOXIE_SIM_H
+
+#define PCIDX 17
+
+struct moxie_sim_cpu {
+  /* To keep this default simulator simple, and fast, we use a direct
+     vector of registers. The internal simulator engine then uses
+     manifests to access the correct slot. */
+  unsigned_word registers[19];
+};
+
+#define MOXIE_SIM_CPU(cpu) ((struct moxie_sim_cpu *) CPU_ARCH_DATA (cpu))
+
+#endif

sim/moxie/sim-main.h

diff --git a/sim/moxie/sim-main.h b/sim/moxie/sim-main.h
index d0df1e9..ad0b2b6 100644
--- a/sim/moxie/sim-main.h
+++ b/sim/moxie/sim-main.h
@@ -23,15 +23,4 @@
 #include "sim-basics.h"
 #include "sim-base.h"
 
-#define PCIDX 17
-
-struct moxie_sim_cpu {
-  /* To keep this default simulator simple, and fast, we use a direct
-     vector of registers. The internal simulator engine then uses
-     manifests to access the correct slot. */
-  unsigned_word registers[19];
-};
-
-#define MOXIE_SIM_CPU(cpu) ((struct moxie_sim_cpu *) CPU_ARCH_DATA (cpu))
-
 #endif