sim/ppc/os_emul.h

   1 /*  This file is part of the program psim.
   2
   3     Copyright (C) 1994-1995, Andrew Cagney <cagney@highland.com.au>
   4
   5     This program is free software; you can redistribute it and/or modify
   6     it under the terms of the GNU General Public License as published by
   7     the Free Software Foundation; either version 2 of the License, or
   8     (at your option) any later version.
   9
  10     This program is distributed in the hope that it will be useful,
  11     but WITHOUT ANY WARRANTY; without even the implied warranty of
  12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13     GNU General Public License for more details.
  14
  15     You should have received a copy of the GNU General Public License
  16     along with this program; if not, write to the Free Software
  17     Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  18
  19     */
  20
  21
  22 #ifndef _OS_EMUL_H_
  23 #define _OS_EMUL_H_
  24
  25 typedef struct _os_emul os_emul;
  26
  27 INLINE_OS_EMUL\
  28 (os_emul *) os_emul_create
  29 (const char *file_name,
  30  device *root);
  31
  32 INLINE_OS_EMUL\
  33 (void) os_emul_init
  34 (os_emul *emulation,
  35  int nr_cpus);
  36
  37
  38 /* System-call emulation - for user code.  Instead of trapping system
  39    calls to kernel mode, the simulator emulates the kernels behavour */
  40
  41 INLINE_OS_EMUL\
  42 (void) os_emul_system_call
  43 (cpu *processor,
  44  unsigned_word cia);
  45
  46
  47 /* Instruction emulation - for kernel code.  Extra (normally illegal)
  48    instructions are added to the instruction table that when executed
  49    call this emulation function. The instruction call emulator should
  50    verify the address that the instruction appears before emulating
  51    the required behavour.  If the verification fails, a zero value
  52    should be returned (indicating instruction illegal). */
  53
  54 INLINE_OS_EMUL\
  55 (int) os_emul_instruction_call
  56 (cpu *processor,
  57  unsigned_word cia,
  58  unsigned_word ra);
  59
  60 #endif