1/*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 1997 Jonathan Lemon
5 * All rights reserved.
6 *
7 * Derived from register.h, which is
8 *     Copyright (c) 1996 Michael Smith.  All rights reserved.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 *
31 * $FreeBSD$
32 */
33
34#ifndef _MACHINE_VM86_H_
35#define _MACHINE_VM86_H_ 1
36
37/* standard register representation */
38typedef union {
39	u_int	r_ex;
40	struct {
41		u_short	r_x;
42		u_int	:16;
43	} r_w;
44	struct {
45		u_char	r_l;
46		u_char	r_h;
47		u_int	:16;
48	} r_b;
49} reg86_t;
50
51/* layout must match definition of struct trapframe_vm86 in <machine/frame.h> */
52
53struct vm86frame {
54	int	kernel_fs;
55	int	kernel_es;
56	int	kernel_ds;
57	reg86_t	edi;
58	reg86_t	esi;
59	reg86_t	ebp;
60	reg86_t	isp;
61	reg86_t	ebx;
62	reg86_t	edx;
63	reg86_t	ecx;
64	reg86_t	eax;
65	int	vmf_trapno;
66	int	vmf_err;
67	reg86_t	eip;
68	reg86_t	cs;
69	reg86_t	eflags;
70	reg86_t	esp;
71	reg86_t	ss;
72	reg86_t	es;
73	reg86_t	ds;
74	reg86_t	fs;
75	reg86_t	gs;
76#define vmf_ah		eax.r_b.r_h
77#define vmf_al		eax.r_b.r_l
78#define vmf_ax		eax.r_w.r_x
79#define vmf_eax		eax.r_ex
80#define vmf_bh		ebx.r_b.r_h
81#define vmf_bl		ebx.r_b.r_l
82#define vmf_bx		ebx.r_w.r_x
83#define vmf_ebx		ebx.r_ex
84#define vmf_ch		ecx.r_b.r_h
85#define vmf_cl		ecx.r_b.r_l
86#define vmf_cx		ecx.r_w.r_x
87#define vmf_ecx		ecx.r_ex
88#define vmf_dh		edx.r_b.r_h
89#define vmf_dl		edx.r_b.r_l
90#define vmf_dx		edx.r_w.r_x
91#define vmf_edx		edx.r_ex
92#define vmf_si		esi.r_w.r_x
93#define vmf_di		edi.r_w.r_x
94#define vmf_cs		cs.r_w.r_x
95#define vmf_ds		ds.r_w.r_x
96#define vmf_es		es.r_w.r_x
97#define vmf_ss		ss.r_w.r_x
98#define vmf_bp		ebp.r_w.r_x
99#define vmf_sp		esp.r_w.r_x
100#define vmf_ip		eip.r_w.r_x
101#define vmf_flags	eflags.r_w.r_x
102#define vmf_eflags	eflags.r_ex
103};
104
105#define VM86_PMAPSIZE	24
106#define VMAP_MALLOC	1	/* page was malloced by us */
107
108struct vm86context {
109	int	npages;
110	struct	vm86pmap {
111		int	flags;
112		int	pte_num;
113		vm_offset_t	kva;
114		u_int	old_pte;
115	} pmap[VM86_PMAPSIZE];
116};
117
118#define VM_USERCHANGE   (PSL_USERCHANGE)
119#define VME_USERCHANGE  (VM_USERCHANGE | PSL_VIP | PSL_VIF)
120
121struct vm86_kernel {
122	caddr_t	vm86_intmap;			/* interrupt map */
123	u_int	vm86_eflags;			/* emulated flags */
124	int	vm86_has_vme;			/* VME support */
125	int	vm86_inited;			/* we were initialized */
126	int	vm86_debug;
127	caddr_t	vm86_sproc;			/* address of sproc */
128};
129
130#define VM86_INIT	1
131#define VM86_SET_VME	2
132#define VM86_GET_VME	3
133#define VM86_INTCALL	4
134
135struct vm86_init_args {
136        int     debug;                  /* debug flag */
137        int     cpu_type;               /* cpu type to emulate */
138        u_char  int_map[32];            /* interrupt map */
139};
140
141struct vm86_vme_args {
142	int	state;			/* status */
143};
144
145struct vm86_intcall_args {
146	int	intnum;
147	struct 	vm86frame vmf;
148};
149
150#ifdef _KERNEL
151extern 	int vm86paddr;
152
153struct thread;
154extern	int vm86_emulate(struct vm86frame *);
155extern	int vm86_sysarch(struct thread *, char *);
156extern void vm86_trap(struct vm86frame *);
157extern 	int vm86_intcall(int, struct vm86frame *);
158extern 	int vm86_datacall(int, struct vm86frame *, struct vm86context *);
159extern void vm86_initialize(void);
160extern vm_offset_t vm86_getpage(struct vm86context *, int);
161extern vm_offset_t vm86_addpage(struct vm86context *, int, vm_offset_t);
162extern int vm86_getptr(struct vm86context *, vm_offset_t, u_short *, u_short *);
163
164extern vm_offset_t vm86_getaddr(struct vm86context *, u_short, u_short);
165#endif /* _KERNEL */
166
167#endif /* _MACHINE_VM86_H_ */
168