/* interrupts.h -- 68HC11 Interrupts Emulation
- Copyright 1999, 2000, 2001 Free Software Foundation, Inc.
+ Copyright 1999-2021 Free Software Foundation, Inc.
Written by Stephane Carrez (stcarrez@worldnet.fr)
This file is part of GDB, GAS, and the GNU binutils.
-GDB, GAS, and the GNU binutils are free software; you can redistribute
-them and/or modify them under the terms of the GNU General Public
-License as published by the Free Software Foundation; either version
-1, or (at your option) any later version.
+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.
-GDB, GAS, and the GNU binutils are distributed in the hope that they
-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.
+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 file; see the file COPYING. If not, write to the Free
-Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+along with this program. If not, see <http://www.gnu.org/licenses/>. */
#ifndef _M6811_SIM_INTERRUPTS_H
#define _M6811_SIM_INTERRUPTS_H
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).
are masked; second it checks for pending interrupts and raise one if
interrupts are enabled. */
struct interrupts {
- struct _sim_cpu *cpu;
+ sim_cpu *cpu;
/* Mask of current pending interrupts. */
unsigned long pending_mask;
/* 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. */
/* - 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, 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);