New simulator.

1 files changed, 132 insertions, 0 deletions

diff --git a/sim/m68hc11/interrupts.h b/sim/m68hc11/interrupts.h
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+/* interrupts.h -- 68HC11 Interrupts Emulation
+   Copyright 1999, 2000 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.
+
+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.
+
+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.  */
+
+#ifndef _M6811_SIM_INTERRUPTS_H
+#define _M6811_SIM_INTERRUPTS_H
+
+/* Definition of 68HC11 interrupts.  These enum are used as an index
+   in the interrupt table.  */
+enum M6811_INT
+{
+  M6811_INT_RESERVED1 = 0,
+  M6811_INT_RESERVED2,
+  M6811_INT_RESERVED3,
+  M6811_INT_RESERVED4,
+  M6811_INT_RESERVED5,
+  M6811_INT_RESERVED6,
+  M6811_INT_RESERVED7,
+  M6811_INT_RESERVED8,
+
+  M6811_INT_RESERVED9,
+  M6811_INT_RESERVED10,
+  M6811_INT_RESERVED11,
+
+  M6811_INT_SCI,
+  M6811_INT_SPI,
+  M6811_INT_AINPUT,
+  M6811_INT_AOVERFLOW,
+  M6811_INT_TCTN,
+
+  M6811_INT_OUTCMP5,
+  M6811_INT_OUTCMP4,
+  M6811_INT_OUTCMP3,
+  M6811_INT_OUTCMP2,
+  M6811_INT_OUTCMP1,
+
+  M6811_INT_INCMP3,
+  M6811_INT_INCMP2,
+  M6811_INT_INCMP1,
+
+  M6811_INT_RT,
+  M6811_INT_IRQ,
+  M6811_INT_XIRQ,
+  M6811_INT_SWI,
+  M6811_INT_ILLEGAL,
+
+  M6811_INT_COPRESET,
+  M6811_INT_COPFAIL,
+
+  M6811_INT_RESET,
+  M6811_INT_NUMBER
+};
+
+
+/* Structure to describe how to recognize an interrupt in the
+   68hc11 IO regs.  */
+struct interrupt_def
+{
+  enum M6811_INT   int_number;
+  unsigned char    int_paddr;
+  unsigned char    int_mask;
+  unsigned char    enable_paddr;
+  unsigned char    enabled_mask;
+};
+
+/* 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).
+    - We keep a mask of pending interrupts.  This mask is refreshed by
+      calling 'interrupts_update_pending'.  It must be refreshed each time
+      an IO register is changed.
+    - 'interrupts_process' must be called after each insn. It has two purposes:
+      first it maintains a min/max count of CPU cycles between which interrupts
+      are masked; second it checks for pending interrupts and raise one if
+      interrupts are enabled.  */
+struct interrupts {
+  struct _sim_cpu   *cpu;
+
+  /* Mask of current pending interrupts.  */
+  unsigned long     pending_mask;
+
+  /* Address of vector table.  This is set depending on the
+     68hc11 init mode.  */
+  uint16            vectors_addr;
+
+  /* Priority order of interrupts.  This is controlled by setting the HPRIO
+     IO register.  */
+  enum M6811_INT    interrupt_order[M6811_INT_NUMBER];
+
+  /* Simulator statistics to report useful debug information to users.  */
+
+  /* - Max/Min number of CPU cycles executed with interrupts masked.  */
+  signed64          start_mask_cycle;
+  signed64          min_mask_cycles;
+  signed64          max_mask_cycles;
+
+  /* - Same for XIRQ.  */
+  signed64          xirq_start_mask_cycle;
+  signed64          xirq_min_mask_cycles;
+  signed64          xirq_max_mask_cycles;
+
+  /* - Total number of interrupts raised.  */
+  unsigned long     nb_interrupts_raised;
+};
+
+extern int  interrupts_initialize     (struct _sim_cpu* cpu);
+extern void interrupts_update_pending (struct interrupts* interrupts);
+extern int  interrupts_get_current    (struct interrupts* interrupts);
+extern int  interrupts_process        (struct interrupts* interrupts);
+extern void interrupts_raise          (struct interrupts* interrupts,
+                                       enum M6811_INT number);
+
+extern void interrupts_info           (SIM_DESC sd,
+                                       struct interrupts* interrupts);
+
+#endif