sys/arch/i386/include/bioscall.h

   1 /*      $NetBSD: bioscall.h,v 1.11 2008/04/28 20:23:24 martin Exp $ */
   2
   3 /*-
   4  * Copyright (c) 1997, 2000 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by John Kohl and Jason R. Thorpe.
   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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 #ifndef __I386_BIOSCALL_H__
  33 #define __I386_BIOSCALL_H__
  34
  35 /*
  36  * virtual & physical address of the trampoline
  37  * that we use: page 1.
  38  */
  39 #define BIOSTRAMP_BASE  PAGE_SIZE
  40
  41 #ifndef _LOCORE
  42 #define BIOSREG_LO      0
  43 #define BIOSREG_HI      1
  44
  45 typedef union {
  46         u_char biosreg_quarter[4];
  47         u_short biosreg_half[2];
  48         u_int biosreg_long;
  49 } bios_reg;
  50
  51 struct bioscallregs {
  52     bios_reg r_ax;
  53     bios_reg r_bx;
  54     bios_reg r_cx;
  55     bios_reg r_dx;
  56     bios_reg r_si;
  57     bios_reg r_di;
  58     bios_reg r_flags;
  59     bios_reg r_es;
  60 };
  61
  62 #define AL      r_ax.biosreg_quarter[BIOSREG_LO]
  63 #define AH      r_ax.biosreg_quarter[BIOSREG_HI]
  64 #define AX      r_ax.biosreg_half[BIOSREG_LO]
  65 #define AX_HI   r_ax.biosreg_half[BIOSREG_HI]
  66 #define EAX     r_ax.biosreg_long
  67
  68 #define BL      r_bx.biosreg_quarter[BIOSREG_LO]
  69 #define BH      r_bx.biosreg_quarter[BIOSREG_HI]
  70 #define BX      r_bx.biosreg_half[BIOSREG_LO]
  71 #define BX_HI   r_bx.biosreg_half[BIOSREG_HI]
  72 #define EBX     r_bx.biosreg_long
  73
  74 #define CL      r_cx.biosreg_quarter[BIOSREG_LO]
  75 #define CH      r_cx.biosreg_quarter[BIOSREG_HI]
  76 #define CX      r_cx.biosreg_half[BIOSREG_LO]
  77 #define CX_HI   r_cx.biosreg_half[BIOSREG_HI]
  78 #define ECX     r_cx.biosreg_long
  79
  80 #define DL      r_dx.biosreg_quarter[BIOSREG_LO]
  81 #define DH      r_dx.biosreg_quarter[BIOSREG_HI]
  82 #define DX      r_dx.biosreg_half[BIOSREG_LO]
  83 #define DX_HI   r_dx.biosreg_half[BIOSREG_HI]
  84 #define EDX     r_dx.biosreg_long
  85
  86 #define SI      r_si.biosreg_half[BIOSREG_LO]
  87 #define SI_HI   r_si.biosreg_half[BIOSREG_HI]
  88 #define ESI     r_si.biosreg_long
  89
  90 #define DI      r_di.biosreg_half[BIOSREG_LO]
  91 #define DI_HI   r_di.biosreg_half[BIOSREG_HI]
  92 #define EDI     r_di.biosreg_long
  93
  94 #define FLAGS    r_flags.biosreg_half[BIOSREG_LO]
  95 #define FLAGS_HI r_flags.biosreg_half[BIOSREG_HI]
  96 #define EFLAGS   r_flags.biosreg_long
  97
  98 #define ES      r_es.biosreg_half[BIOSREG_LO]
  99
 100 void bioscall(int /* function*/ , struct bioscallregs * /* regs */);
 101 #endif
 102 #endif /* __I386_BIOSCALL_H__ */