* interp.c (sim_fetch_register): Only store a single byte for

[binutils-gdb.git] / sim / m68hc11 / interrupts.h

diff --git a/sim/m68hc11/interrupts.h b/sim/m68hc11/interrupts.h
index 39069cd3426a9f3c8d104f158df85b3e1dea31ed..d29e577a3aaf50db9b7c68fa091b3146063f6e01 100644 (file)
--- a/sim/m68hc11/interrupts.h
+++ b/sim/m68hc11/interrupts.h
@@ -1,5 +1,5 @@
 /* interrupts.h -- 68HC11 Interrupts Emulation
-   Copyright 1999, 2000 Free Software Foundation, Inc.
+   Copyright 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
    Written by Stephane Carrez (stcarrez@worldnet.fr)
 
 This file is part of GDB, GAS, and the GNU binutils.
@@ -79,6 +79,39 @@ struct interrupt_def
   unsigned char    enabled_mask;
 };
 
+#define MAX_INT_HISTORY 64
+
+/* Structure used to keep track of interrupt history.
+   This is used to understand in which order interrupts were
+   raised and when.  */
+struct interrupt_history
+{
+  enum M6811_INT   type;
+
+  /* CPU cycle when interrupt handler is called.  */
+  signed64         taken_cycle;   
+
+  /* CPU cycle when the interrupt is first raised by the device.  */
+  signed64         raised_cycle;
+};
+
+#define SIM_STOP_WHEN_RAISED 1
+#define SIM_STOP_WHEN_TAKEN  2
+
+/* Information and control of pending interrupts.  */
+struct interrupt
+{
+  /* CPU cycle when the interrupt is raised by the device.  */
+  signed64         cpu_cycle;
+
+  /* Number of times the interrupt was raised.  */
+  unsigned long    raised_count;
+
+  /* Controls whether we must stop the simulator.  */
+  int              stop_mode;
+};
+
+
 /* Management of 68HC11 interrupts:
     - We use a table of 'interrupt_def' to describe the interrupts that must be
       raised depending on IO register flags (enable and present flags).
@@ -102,6 +135,7 @@ struct interrupts {
   /* Priority order of interrupts.  This is controlled by setting the HPRIO
      IO register.  */
   enum M6811_INT    interrupt_order[M6811_INT_NUMBER];
+  struct interrupt  interrupts[M6811_INT_NUMBER];
 
   /* Simulator statistics to report useful debug information to users.  */
 
@@ -109,17 +143,25 @@ struct interrupts {
   signed64          start_mask_cycle;
   signed64          min_mask_cycles;
   signed64          max_mask_cycles;
+  signed64          last_mask_cycles;
 
   /* - Same for XIRQ.  */
   signed64          xirq_start_mask_cycle;
   signed64          xirq_min_mask_cycles;
   signed64          xirq_max_mask_cycles;
+  signed64          xirq_last_mask_cycles;
 
   /* - Total number of interrupts raised.  */
   unsigned long     nb_interrupts_raised;
+
+  /* Interrupt history to help understand which interrupts
+     were raised recently and in which order.  */
+  int               history_index;
+  struct interrupt_history interrupts_history[MAX_INT_HISTORY];
 };
 
-extern int  interrupts_initialize     (struct _sim_cpu* cpu);
+extern void interrupts_initialize     (SIM_DESC sd, struct _sim_cpu* cpu);
+extern void interrupts_reset          (struct interrupts* interrupts);
 extern void interrupts_update_pending (struct interrupts* interrupts);
 extern int  interrupts_get_current    (struct interrupts* interrupts);
 extern int  interrupts_process        (struct interrupts* interrupts);