sys/cpu/i386/include/vm86.h

   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: src/sys/i386/include/vm86.h,v 1.13 1999/09/02 20:59:50 luoqi Exp $
  30  * $DragonFly: src/sys/cpu/i386/include/vm86.h,v 1.9 2007/01/08 03:33:37 dillon Exp $
  31  */
  32
  33 #ifndef _CPU_VM86_H_
  34 #define _CPU_VM86_H_
  35
  36 #ifndef _SYS_TYPES_H_
  37 #include <sys/types.h>
  38 #endif
  39
  40 /* standard register representation */
  41 typedef union {
  42         u_int   r_ex;
  43         struct {
  44                 u_short r_x;
  45                 u_int   :16;
  46         } r_w;
  47         struct {
  48                 u_char  r_l;
  49                 u_char  r_h;
  50                 u_int   :16;
  51         } r_b;
  52 } reg86_t;
  53
  54 /* layout must match definition of struct trapframe_vm86 in <machine/frame.h> */
  55
  56 struct vm86frame {
  57         int     kernel_gs;
  58         int     kernel_fs;
  59         int     kernel_es;
  60         int     kernel_ds;
  61         reg86_t edi;
  62         reg86_t esi;
  63         reg86_t ebp;
  64         reg86_t isp;
  65         reg86_t ebx;
  66         reg86_t edx;
  67         reg86_t ecx;
  68         reg86_t eax;
  69         int     vmf_xflags;
  70         int     vmf_trapno;
  71         int     vmf_err;
  72         reg86_t eip;
  73         reg86_t cs;
  74         reg86_t eflags;
  75         reg86_t esp;
  76         reg86_t ss;
  77         reg86_t es;
  78         reg86_t ds;
  79         reg86_t fs;
  80         reg86_t gs;
  81 #define vmf_ah          eax.r_b.r_h
  82 #define vmf_al          eax.r_b.r_l
  83 #define vmf_ax          eax.r_w.r_x
  84 #define vmf_eax         eax.r_ex
  85 #define vmf_bh          ebx.r_b.r_h
  86 #define vmf_bl          ebx.r_b.r_l
  87 #define vmf_bx          ebx.r_w.r_x
  88 #define vmf_ebx         ebx.r_ex
  89 #define vmf_ch          ecx.r_b.r_h
  90 #define vmf_cl          ecx.r_b.r_l
  91 #define vmf_cx          ecx.r_w.r_x
  92 #define vmf_ecx         ecx.r_ex
  93 #define vmf_dh          edx.r_b.r_h
  94 #define vmf_dl          edx.r_b.r_l
  95 #define vmf_dx          edx.r_w.r_x
  96 #define vmf_edx         edx.r_ex
  97 #define vmf_si          esi.r_w.r_x
  98 #define vmf_di          edi.r_w.r_x
  99 #define vmf_cs          cs.r_w.r_x
 100 #define vmf_ds          ds.r_w.r_x
 101 #define vmf_es          es.r_w.r_x
 102 #define vmf_ss          ss.r_w.r_x
 103 #define vmf_sp          esp.r_w.r_x
 104 #define vmf_ip          eip.r_w.r_x
 105 #define vmf_flags       eflags.r_w.r_x
 106 #define vmf_eflags      eflags.r_ex
 107 };
 108
 109 #define VM86_PMAPSIZE   3
 110 #define VMAP_MALLOC     1       /* page was malloced by us */
 111
 112 struct vm86context {
 113         int     npages;
 114         struct  vm86pmap {
 115                 int     flags;
 116                 int     pte_num;
 117                 vm_offset_t     kva;
 118                 u_int   old_pte;
 119         } pmap[VM86_PMAPSIZE];
 120 };
 121
 122 #define VM_USERCHANGE   (PSL_USERCHANGE | PSL_RF)
 123 #define VME_USERCHANGE  (VM_USERCHANGE | PSL_VIP | PSL_VIF)
 124
 125 struct vm86_kernel {
 126         caddr_t vm86_intmap;                    /* interrupt map */
 127         u_int   vm86_eflags;                    /* emulated flags */
 128         int     vm86_has_vme;                   /* VME support */
 129         int     vm86_inited;                    /* we were initialized */
 130         int     vm86_debug;
 131         caddr_t vm86_sproc;                     /* address of sproc */
 132 };
 133
 134 #define VM86_INIT       1
 135 #define VM86_SET_VME    2
 136 #define VM86_GET_VME    3
 137 #define VM86_INTCALL    4
 138
 139 struct vm86_init_args {
 140         int     debug;                  /* debug flag */
 141         int     cpu_type;               /* cpu type to emulate */
 142         u_char  int_map[32];            /* interrupt map */
 143 };
 144
 145 struct vm86_vme_args {
 146         int     state;                  /* status */
 147 };
 148
 149 struct vm86_intcall_args {
 150         int     intnum;
 151         struct  vm86frame vmf;
 152 };
 153
 154 extern  int in_vm86call;
 155 extern  pt_entry_t *vm86paddr;
 156
 157 struct lwp;
 158
 159 extern  int vm86_emulate (struct vm86frame *);
 160 extern  int vm86_sysarch (struct lwp *, char *);
 161 extern void vm86_trap (struct vm86frame *, int);
 162 extern  int vm86_intcall (int, struct vm86frame *);
 163 extern  int vm86_datacall (int, struct vm86frame *, struct vm86context *);
 164 extern void vm86_initialize (void);
 165 extern vm_offset_t vm86_getpage (struct vm86context *, int);
 166 extern vm_offset_t vm86_addpage (struct vm86context *, int, vm_offset_t);
 167 extern int vm86_getptr (struct vm86context *, vm_offset_t,
 168                                 u_short *, u_short *);
 169
 170 extern vm_offset_t vm86_getaddr (struct vm86context *, u_short, u_short);
 171
 172 #endif /* _CPU_VM86_H_ */