The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/i386/include/vm86.h

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    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: releng/11.2/sys/i386/include/vm86.h 331722 2018-03-29 02:50:57Z eadler $
   30  */
   31 
   32 #ifndef _MACHINE_VM86_H_
   33 #define _MACHINE_VM86_H_ 1
   34 
   35 /* standard register representation */
   36 typedef 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 
   51 struct 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 
  106 struct 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 
  119 struct 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 
  133 struct 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 
  139 struct vm86_vme_args {
  140         int     state;                  /* status */
  141 };
  142 
  143 struct vm86_intcall_args {
  144         int     intnum;
  145         struct  vm86frame vmf;
  146 };
  147 
  148 #ifdef _KERNEL
  149 extern  int vm86paddr;
  150 
  151 struct thread;
  152 extern  int vm86_emulate(struct vm86frame *);
  153 extern  int vm86_sysarch(struct thread *, char *);
  154 extern void vm86_trap(struct vm86frame *);
  155 extern  int vm86_intcall(int, struct vm86frame *);
  156 extern  int vm86_datacall(int, struct vm86frame *, struct vm86context *);
  157 extern void vm86_initialize(void);
  158 extern vm_offset_t vm86_getpage(struct vm86context *, int);
  159 extern vm_offset_t vm86_addpage(struct vm86context *, int, vm_offset_t);
  160 extern int vm86_getptr(struct vm86context *, vm_offset_t, u_short *, u_short *);
  161 
  162 extern vm_offset_t vm86_getaddr(struct vm86context *, u_short, u_short);
  163 #endif /* _KERNEL */
  164 
  165 #endif /* _MACHINE_VM86_H_ */

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