NetBSD/sys/arch/i386/include/vm86.h

/*	$NetBSD: vm86.h,v 1.2 1996/02/27 22:32:16 jtc Exp $	*/

/*-
 * Copyright (c) 1996 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by John T. Kohl and Charles M. Hannum.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *        This product includes software developed by the NetBSD
 *        Foundation, Inc. and its contributors.
 * 4. Neither the name of The NetBSD Foundation nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#define SETFLAGS(targ, new, newmask) (targ) = ((targ) & ~(newmask)) | ((new) & (newmask))
#define VM86_EFLAGS(p)	((p)->p_addr->u_pcb.vm86_eflags)
#define VM86_FLAGMASK(p) ((p)->p_addr->u_pcb.vm86_flagmask)

#define VM86_TYPE(x)	((x) & 0xff)
#define VM86_ARG(x)	(((x) & 0xff00) >> 8)
#define	VM86_MAKEVAL(type,arg) ((type) | (((arg) & 0xff) << 8))
#define		VM86_STI	0
#define		VM86_INTx	1
#define		VM86_SIGNAL	2
#define		VM86_UNKNOWN	3

struct vm86_regs {
	struct sigcontext vmsc;
};

struct vm86_kern {			/* kernel uses this stuff */
	struct vm86_regs regs;
	unsigned long ss_cpu_type;
};
#define cpu_type substr.ss_cpu_type

/*
 * Kernel keeps copy of user-mode address of this, but doesn't copy it in.
 */
struct vm86_struct {
	struct vm86_kern substr;
	unsigned long screen_bitmap;	/* not used/supported (yet) */
	unsigned long flags;		/* not used/supported (yet) */
	unsigned char int_byuser[32];	/* 256 bits each: pass control to user */
	unsigned char int21_byuser[32];	/* otherwise, handle directly */
};

#define BIOSSEG		0x0f000

#define VCPU_086		0
#define VCPU_186		1
#define VCPU_286		2
#define VCPU_386		3
#define VCPU_486		4
#define VCPU_586		5

#ifdef _KERNEL
int i386_vm86 __P((struct proc *, char *, register_t *));
void vm86_gpfault __P((struct proc *, int));
#else
int i386_vm86 __P((struct vm86_struct *vmcp));
#endif