btxv86.h revision 50477 
1/*
2 * Copyright (c) 1998 Robert Nordier
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms are freely
6 * permitted provided that the above copyright notice and this
7 * paragraph and the following disclaimer are duplicated in all
8 * such forms.
9 *
10 * This software is provided "AS IS" and without any express or
11 * implied warranties, including, without limitation, the implied
12 * warranties of merchantability and fitness for a particular
13 * purpose.
14 */
15
16/*
17 * $FreeBSD: head/sys/boot/pc98/btx/lib/btxv86.h 50477 1999-08-28 01:08:13Z peter $
18 */
19
20#ifndef _BTXV86_H_
21#define _BTXV86_H_
22
23#include <sys/types.h>
24
25#define V86_ADDR   0x10000	/* Segment:offset address */
26#define V86_CALLF  0x20000	/* Emulate far call */
27#define V86_FLAGS  0x40000	/* Return flags */
28
29struct __v86 {
30    uint32_t ctl;		/* Control flags */
31    uint32_t addr;		/* Interrupt number or address */
32    uint32_t es;		/* V86 ES register */
33    uint32_t ds;		/* V86 DS register */
34    uint32_t fs;		/* V86 FS register */
35    uint32_t gs;		/* V86 GS register */
36    uint32_t eax;		/* V86 EAX register */
37    uint32_t ecx;		/* V86 ECX register */
38    uint32_t edx;		/* V86 EDX register */
39    uint32_t ebx;		/* V86 EBX register */
40    uint32_t efl;		/* V86 eflags register */
41    uint32_t ebp;		/* V86 EBP register */
42    uint32_t esi;		/* V86 ESI register */
43    uint32_t edi;		/* V86 EDI register */
44};
45
46extern struct __v86 __v86;	/* V86 interface structure */
47void __v86int(void);
48
49#define v86	__v86
50#define v86int	__v86int
51
52extern u_int32_t	__base;
53extern u_int32_t	__args;
54
55#define	PTOV(pa)	((caddr_t)(pa) - __base)
56#define	VTOP(va)	((vm_offset_t)(va) + __base)
57#define	VTOPSEG(va)	(u_int16_t)(VTOP((caddr_t)va) >> 4)
58#define	VTOPOFF(va)	(u_int16_t)(VTOP((caddr_t)va) & 0xf)
59
60void __exit(int) __attribute__((__noreturn__));
61void __exec(caddr_t, ...);
62
63#endif /* !_BTXV86_H_ */
64