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diff --git a/sim/common/cgen-cpu.h b/sim/common/cgen-cpu.h
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+/* Simulator header for cgen cpus.
+   Copyright (C) 1998, 1999 Free Software Foundation, Inc.
+   Contributed by Cygnus Support.
+
+This file is part of GDB, the GNU debugger.
+
+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 2, or (at your option)
+any later version.
+
+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 program; if not, write to the Free Software Foundation, Inc.,
+59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
+
+#ifndef CGEN_CPU_H
+#define CGEN_CPU_H
+
+/* Type of function that is ultimately called by sim_resume.  */
+typedef void (ENGINE_FN) (SIM_CPU *);
+
+/* Type of function to do disassembly.  */
+typedef void (CGEN_DISASSEMBLER) (SIM_CPU *, const CGEN_INSN *,
+				  const ARGBUF *, IADDR pc_, char *buf_);
+
+/* Additional non-machine generated per-cpu data to go in SIM_CPU.
+   The member's name must be `cgen_cpu'.  */
+
+typedef struct {
+  /* Non-zero while cpu simulation is running.  */
+  int running_p;
+#define CPU_RUNNING_P(cpu) ((cpu)->cgen_cpu.running_p)
+
+  /* Instruction count.  This is maintained even in fast mode to keep track
+     of simulator speed.  */
+  unsigned long insn_count;
+#define CPU_INSN_COUNT(cpu) ((cpu)->cgen_cpu.insn_count)
+
+  /* sim_resume handlers */
+  ENGINE_FN *fast_engine_fn;
+#define CPU_FAST_ENGINE_FN(cpu) ((cpu)->cgen_cpu.fast_engine_fn)
+  ENGINE_FN *full_engine_fn;
+#define CPU_FULL_ENGINE_FN(cpu) ((cpu)->cgen_cpu.full_engine_fn)
+
+  /* Maximum number of instructions per time slice.
+     When single stepping this is 1.  If using the pbb model, this can be
+     more than 1.  0 means "as long as you want".  */
+  unsigned int max_slice_insns;
+#define CPU_MAX_SLICE_INSNS(cpu) ((cpu)->cgen_cpu.max_slice_insns)
+
+  /* Simulator's execution cache.
+     Allocate space for this even if not used as some simulators may have
+     one machine variant that uses the scache and another that doesn't and
+     we don't want members in this struct to move about.  */
+  CPU_SCACHE scache;
+
+  /* Instruction descriptor table.  */
+  IDESC *idesc;
+#define CPU_IDESC(cpu) ((cpu)->cgen_cpu.idesc)
+
+  /* Whether the read,write,semantic entries (computed goto labels) have been
+     initialized or not.  */
+  int idesc_read_init_p;
+#define CPU_IDESC_READ_INIT_P(cpu) ((cpu)->cgen_cpu.idesc_read_init_p)
+  int idesc_write_init_p;
+#define CPU_IDESC_WRITE_INIT_P(cpu) ((cpu)->cgen_cpu.idesc_write_init_p)
+  int idesc_sem_init_p;
+#define CPU_IDESC_SEM_INIT_P(cpu) ((cpu)->cgen_cpu.idesc_sem_init_p)
+
+  /* Cpu descriptor table.
+     This is a CGEN created entity that contains the description file
+     turned into C code and tables for our use.  */
+  CGEN_CPU_DESC cpu_desc;
+#define CPU_CPU_DESC(cpu) ((cpu)->cgen_cpu.cpu_desc)
+
+  /* Function to fetch the insn data entry in the IDESC.  */
+  const CGEN_INSN * (*get_idata) (SIM_CPU *, int);
+#define CPU_GET_IDATA(cpu) ((cpu)->cgen_cpu.get_idata)
+
+  /* Disassembler.  */
+  CGEN_DISASSEMBLER *disassembler;
+#define CPU_DISASSEMBLER(cpu) ((cpu)->cgen_cpu.disassembler)
+
+  /* Allow slop in size calcs for case where multiple cpu types are supported
+     and space for the specified cpu is malloc'd at run time.  */
+  double slop;
+} CGEN_CPU;
+
+/* Shorthand macro for fetching registers.
+   CPU_CGEN_HW is defined in cpu.h.  */
+#define CPU(x) (CPU_CGEN_HW (current_cpu)->x)
+
+#endif /* CGEN_CPU_H */