vm86.h revision 258559 
1/*-
2 * Copyright (c) 1997 Jonathan Lemon
3 * All rights reserved.
4 *
5 * Derived from register.h, which is
6 *     Copyright (c) 1996 Michael Smith.  All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * $FreeBSD: stable/10/sys/i386/include/vm86.h 258559 2013-11-25 15:58:48Z emaste $
30 */
31
32#ifndef _MACHINE_VM86_H_
33#define _MACHINE_VM86_H_ 1
34
35/* standard register representation */
36typedef union {
37	u_int	r_ex;
38	struct {
39		u_short	r_x;
40		u_int	:16;
41	} r_w;
42	struct {
43		u_char	r_l;
44		u_char	r_h;
45		u_int	:16;
46	} r_b;
47} reg86_t;
48
49/* layout must match definition of struct trapframe_vm86 in <machine/frame.h> */
50
51struct vm86frame {
52	int	kernel_fs;
53	int	kernel_es;
54	int	kernel_ds;
55	reg86_t	edi;
56	reg86_t	esi;
57	reg86_t	ebp;
58	reg86_t	isp;
59	reg86_t	ebx;
60	reg86_t	edx;
61	reg86_t	ecx;
62	reg86_t	eax;
63	int	vmf_trapno;
64	int	vmf_err;
65	reg86_t	eip;
66	reg86_t	cs;
67	reg86_t	eflags;
68	reg86_t	esp;
69	reg86_t	ss;
70	reg86_t	es;
71	reg86_t	ds;
72	reg86_t	fs;
73	reg86_t	gs;
74#define vmf_ah		eax.r_b.r_h
75#define vmf_al		eax.r_b.r_l
76#define vmf_ax		eax.r_w.r_x
77#define vmf_eax		eax.r_ex
78#define vmf_bh		ebx.r_b.r_h
79#define vmf_bl		ebx.r_b.r_l
80#define vmf_bx		ebx.r_w.r_x
81#define vmf_ebx		ebx.r_ex
82#define vmf_ch		ecx.r_b.r_h
83#define vmf_cl		ecx.r_b.r_l
84#define vmf_cx		ecx.r_w.r_x
85#define vmf_ecx		ecx.r_ex
86#define vmf_dh		edx.r_b.r_h
87#define vmf_dl		edx.r_b.r_l
88#define vmf_dx		edx.r_w.r_x
89#define vmf_edx		edx.r_ex
90#define vmf_si		esi.r_w.r_x
91#define vmf_di		edi.r_w.r_x
92#define vmf_cs		cs.r_w.r_x
93#define vmf_ds		ds.r_w.r_x
94#define vmf_es		es.r_w.r_x
95#define vmf_ss		ss.r_w.r_x
96#define vmf_bp		ebp.r_w.r_x
97#define vmf_sp		esp.r_w.r_x
98#define vmf_ip		eip.r_w.r_x
99#define vmf_flags	eflags.r_w.r_x
100#define vmf_eflags	eflags.r_ex
101};
102
103#define VM86_PMAPSIZE	24
104#define VMAP_MALLOC	1	/* page was malloced by us */
105
106struct vm86context {
107	int	npages;
108	struct	vm86pmap {
109		int	flags;
110		int	pte_num;
111		vm_offset_t	kva;
112		u_int	old_pte;
113	} pmap[VM86_PMAPSIZE];
114};
115
116#define VM_USERCHANGE   (PSL_USERCHANGE)
117#define VME_USERCHANGE  (VM_USERCHANGE | PSL_VIP | PSL_VIF)
118
119struct vm86_kernel {
120	caddr_t	vm86_intmap;			/* interrupt map */
121	u_int	vm86_eflags;			/* emulated flags */
122	int	vm86_has_vme;			/* VME support */
123	int	vm86_inited;			/* we were initialized */
124	int	vm86_debug;
125	caddr_t	vm86_sproc;			/* address of sproc */
126};
127
128#define VM86_INIT	1
129#define VM86_SET_VME	2
130#define VM86_GET_VME	3
131#define VM86_INTCALL	4
132
133struct vm86_init_args {
134        int     debug;                  /* debug flag */
135        int     cpu_type;               /* cpu type to emulate */
136        u_char  int_map[32];            /* interrupt map */
137};
138
139struct vm86_vme_args {
140	int	state;			/* status */
141};
142
143struct vm86_intcall_args {
144	int	intnum;
145	struct 	vm86frame vmf;
146};
147
148#ifdef _KERNEL
149extern 	int vm86paddr;
150
151struct thread;
152extern	int vm86_emulate(struct vm86frame *);
153extern	int vm86_sysarch(struct thread *, char *);
154extern void vm86_trap(struct vm86frame *);
155extern 	int vm86_intcall(int, struct vm86frame *);
156extern 	int vm86_datacall(int, struct vm86frame *, struct vm86context *);
157extern void vm86_initialize(void);
158extern vm_offset_t vm86_getpage(struct vm86context *, int);
159extern vm_offset_t vm86_addpage(struct vm86context *, int, vm_offset_t);
160extern int vm86_getptr(struct vm86context *, vm_offset_t, u_short *, u_short *);
161
162extern vm_offset_t vm86_getaddr(struct vm86context *, u_short, u_short);
163#endif /* _KERNEL */
164
165#endif /* _MACHINE_VM86_H_ */
166