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      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__ */
    103