* Makefile.in: Add Timer A support.

* cpu.h (m32c_opcode_pc): New.
(in_gdb): New.
* gdb-if.c (sim_open): Add Timer A support.  Support unbuffered
console.
* int.c (trigger_interrupt): Manage the U flag properly.
(trigger_based_interrupt): Likewise.
(trigger_fixed_interrupt): New.
(trigger_peripheral_interrupt): New.
* int.h (trigger_peripheral_interrupt): New.
* m32c.opc: Use m32c_opcode_pc throughout, as needed.
(decode_m32c): Detect jump-to-zero with traceback.
(BRK): Try to do the right thing, keeping track of whether we're
in gdb or not, and if the user has provided a handler or not.
(GBRK): Alternate break opcode for gdb, in case the user's app
needs to use BRK for itself.
(BRK2): Implement.
* main.c: Add Timer A support.  Support TCP-based console.
(setup_tcp_console): New.
(main): Add Timer A support.  Support TCP-based console.
* mem.c: Add Timer A support.  Support TCP-based console.
(mem_ptr): Enhance NULL pointer detection.
(stdin_ready): New.
(m32c_sim_restore_console): New.
(mem_get_byte): Check for console input ready.
(update_timer_a): New.
* r8c.opc (SSTR): Use r0l, not r0h.
(REIT): Fix return frame logic.
* reg.c (print_flags): New.
(trace_register_changes): Use it.
(m32c_dump_all_registers): New.
* timer_a.h: New.

* load.c: Fix indentation.
* trace.c: Fix indentation.
* trace.h: Fix indentation.

sim/m32c/timer_a.h

@@ -0,0 +1,12 @@
+typedef struct
+{
+  int count;
+  int reload;
+  int prescale;
+  int tcspr;
+  unsigned char bsr;
+  unsigned char mode;
+  unsigned char ic;
+} Timer_A;
+
+extern Timer_A timer_a;