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/*
* vm86.h: vm86 emulator definitions.
*
* Leendert van Doorn, leendert@watson.ibm.com
* Copyright (c) 2005, International Business Machines Corporation.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope 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 __VM86_H__
#define __VM86_H__
#ifndef __ASSEMBLY__
#include <stdint.h>
#endif
#include <xen/hvm/vmx_assist.h>
#define NR_EXCEPTION_HANDLER 32
#define NR_INTERRUPT_HANDLERS 16
#define NR_TRAPS (NR_EXCEPTION_HANDLER+NR_INTERRUPT_HANDLERS)
#ifndef __ASSEMBLY__
struct regs {
unsigned edi, esi, ebp, esp, ebx, edx, ecx, eax;
unsigned es, ds, fs, gs;
unsigned trapno, errno;
unsigned eip, cs, eflags, uesp, uss;
unsigned ves, vds, vfs, vgs;
};
enum vm86_mode {
VM86_REAL = 0,
VM86_REAL_TO_PROTECTED,
VM86_PROTECTED_TO_REAL,
VM86_PROTECTED
};
#ifdef DEBUG
#define TRACE(a) trace a
#else
#define TRACE(a)
#endif
extern enum vm86_mode prevmode, mode;
extern struct vmx_assist_context oldctx;
extern struct vmx_assist_context newctx;
extern void emulate(struct regs *);
extern void dump_regs(struct regs *);
extern void trace(struct regs *, int, char *, ...);
extern void set_mode(struct regs *, enum vm86_mode);
extern void switch_to_real_mode(void);
extern void switch_to_protected_mode(void);
#endif /* __ASSEMBLY__ */
#endif /* __VM86_H__ */
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