* 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.

1 files changed, 22 insertions, 6 deletions

diff --git a/sim/m32c/int.c b/sim/m32c/int.c
index 1959c77..5556a12 100644
--- a/sim/m32c/int.c
+++ b/sim/m32c/int.c
@@ -23,13 +23,17 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 #include "cpu.h"
 #include "mem.h"
 
-void
-trigger_fixed_interrupt (int addr)
+static void
+trigger_interrupt (int addr, int clear_u)
 {
   int s = get_reg (sp);
   int f = get_reg (flags);
   int p = get_reg (pc);
 
+  if (clear_u)
+    set_flags (FLAGBIT_U, 0);
+  set_flags (FLAGBIT_I | FLAGBIT_D, 0);
+
   if (A16)
     {
       s -= 4;
@@ -46,14 +50,26 @@ trigger_fixed_interrupt (int addr)
       mem_put_hi (s + 4, f);
     }
   put_reg (pc, mem_get_psi (addr));
-  set_flags (FLAGBIT_U | FLAGBIT_I | FLAGBIT_D, 0);
+}
+
+void
+trigger_fixed_interrupt (int addr)
+{
+  trigger_interrupt (addr, 1);
 }
 
 void
 trigger_based_interrupt (int vector)
 {
   int addr = get_reg (intb) + vector * 4;
-  if (vector <= 31)
-    set_flags (FLAGBIT_U, 0);
-  trigger_fixed_interrupt (addr);
+  trigger_interrupt (addr, vector <= 31);
+}
+
+void
+trigger_peripheral_interrupt (int vector, int icaddr)
+{
+  unsigned char old_ic = mem_get_qi (icaddr);
+  int addr = get_reg (intb) + vector * 4;
+  trigger_interrupt (addr, 1);
+  put_reg (flags, (get_reg (flags) & 0x8fff) | ((old_ic & 7) << 12));
 }