sim/ppc/os_emul.h

/*  This file is part of the program psim.

    Copyright (C) 1994-1995, Andrew Cagney <cagney@highland.com.au>

    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.

    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, see <http://www.gnu.org/licenses/>.
 
    */


#ifndef _OS_EMUL_H_
#define _OS_EMUL_H_

typedef struct _os_emul os_emul;

INLINE_OS_EMUL\
(os_emul *) os_emul_create
(const char *file_name,
 device *root);

INLINE_OS_EMUL\
(void) os_emul_init
(os_emul *emulation,
 int nr_cpus);


/* System-call emulation - for user code.  Instead of trapping system
   calls to kernel mode, the simulator emulates the kernels behavour */

INLINE_OS_EMUL\
(void) os_emul_system_call
(cpu *processor,
 unsigned_word cia);


/* Instruction emulation - for kernel code.  Extra (normally illegal)
   instructions are added to the instruction table that when executed
   call this emulation function. The instruction call emulator should
   verify the address that the instruction appears before emulating
   the required behavour.  If the verification fails, a zero value
   should be returned (indicating instruction illegal). */

INLINE_OS_EMUL\
(int) os_emul_instruction_call
(cpu *processor,
 unsigned_word cia,
 unsigned_word ra);

#endif