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bioscall.h revision 1.6 
      1 /*	$NetBSD: bioscall.h,v 1.6 2000/07/12 22:58:12 thorpej 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  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *        This product includes software developed by the NetBSD
     21  *        Foundation, Inc. and its contributors.
     22  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  *    contributors may be used to endorse or promote products derived
     24  *    from this software without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  * POSSIBILITY OF SUCH DAMAGE.
     37  */
     38 
     39 #ifndef __I386_BIOSCALL_H__
     40 #define __I386_BIOSCALL_H__
     41 
     42 /*
     43  * virtual & physical address of the trampoline
     44  * that we use: page 1.
     45  */
     46 #define BIOSTRAMP_BASE	NBPG
     47 
     48 #ifndef _LOCORE
     49 #define	BIOSREG_LO	0
     50 #define	BIOSREG_HI	1
     51 
     52 typedef	union {
     53 	u_char biosreg_quarter[4];
     54 	u_short biosreg_half[2];
     55 	u_int biosreg_long;
     56 } bios_reg;
     57 
     58 struct bioscallregs {
     59     bios_reg r_ax;
     60     bios_reg r_bx;
     61     bios_reg r_cx;
     62     bios_reg r_dx;
     63     bios_reg r_si;
     64     bios_reg r_di;
     65     bios_reg r_flags;
     66 };
     67 
     68 #define	AL	r_ax.biosreg_quarter[BIOSREG_LO]
     69 #define	AH	r_ax.biosreg_quarter[BIOSREG_HI]
     70 #define	AX	r_ax.biosreg_half[BIOSREG_LO]
     71 #define	AX_HI	r_ax.biosreg_half[BIOSREG_HI]
     72 #define	EAX	r_ax.biosreg_long
     73 
     74 #define	BL	r_bx.biosreg_quarter[BIOSREG_LO]
     75 #define	BH	r_bx.biosreg_quarter[BIOSREG_HI]
     76 #define	BX	r_bx.biosreg_half[BIOSREG_LO]
     77 #define	BX_HI	r_bx.biosreg_half[BIOSREG_HI]
     78 #define	EBX	r_bx.biosreg_long
     79 
     80 #define	CL	r_cx.biosreg_quarter[BIOSREG_LO]
     81 #define	CH	r_cx.biosreg_quarter[BIOSREG_HI]
     82 #define	CX	r_cx.biosreg_half[BIOSREG_LO]
     83 #define	CX_HI	r_cx.biosreg_half[BIOSREG_HI]
     84 #define	ECX	r_cx.biosreg_long
     85 
     86 #define	DL	r_dx.biosreg_quarter[BIOSREG_LO]
     87 #define	DH	r_dx.biosreg_quarter[BIOSREG_HI]
     88 #define	DX	r_dx.biosreg_half[BIOSREG_LO]
     89 #define	DX_HI	r_dx.biosreg_half[BIOSREG_HI]
     90 #define	EDX	r_dx.biosreg_long
     91 
     92 #define	SI	r_si.biosreg_half[BIOSREG_LO]
     93 #define	SI_HI	r_si.biosreg_half[BIOSREG_HI]
     94 #define	ESI	r_si.biosreg_long
     95 
     96 #define	DI	r_di.biosreg_half[BIOSREG_LO]
     97 #define	DI_HI	r_di.biosreg_half[BIOSREG_HI]
     98 #define	EDI	r_di.biosreg_long
     99 
    100 #define	FLAGS	 r_flags.biosreg_half[BIOSREG_LO]
    101 #define	FLAGS_HI r_flags.biosreg_half[BIOSREG_HI]
    102 #define	EFLAGS	 r_flags.biosreg_long
    103 
    104 void bioscall __P((int /* function*/ , struct bioscallregs * /* regs */));
    105 #endif
    106 #endif /* __I386_BIOSCALL_H__ */
    107