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Clean up bios_reg a little, and add support for accessing

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the byte variants of the registers (e.g. %ah, %al, etc.).
This commit is contained in:
thorpej 2000-07-12 22:58:12 +00:00
parent 662fbfe2f1
commit c0708e9ff1
1 changed files with 48 additions and 30 deletions
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78
sys/arch/i386/include/bioscall.h
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@ -1,10 +1,11 @@
/* $NetBSD: bioscall.h,v 1.5 1998/10/03 02:14:52 jtk Exp $ */ /* $NetBSD: bioscall.h,v 1.6 2000/07/12 22:58:12 thorpej Exp $ */
/*- /*-
* Copyright (c) 1997 The NetBSD Foundation, Inc. * Copyright (c) 1997, 2000 The NetBSD Foundation, Inc.
* All rights reserved. * All rights reserved.
* *
* This code is derived from software contributed to The NetBSD Foundation * This code is derived from software contributed to The NetBSD Foundation
* by John Kohl. * by John Kohl and Jason R. Thorpe.
* *
* Redistribution and use in source and binary forms, with or without * Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions * modification, are permitted provided that the following conditions
@ -34,6 +35,7 @@
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE. * POSSIBILITY OF SUCH DAMAGE.
*/ */
#ifndef __I386_BIOSCALL_H__ #ifndef __I386_BIOSCALL_H__
#define __I386_BIOSCALL_H__ #define __I386_BIOSCALL_H__
@ -44,12 +46,13 @@
#define BIOSTRAMP_BASE NBPG #define BIOSTRAMP_BASE NBPG
#ifndef _LOCORE #ifndef _LOCORE
typedef union bios_register { #define BIOSREG_LO 0
struct { #define BIOSREG_HI 1
u_short hw_lo;
u_short hw_hi; typedef union {
} halfword; u_char biosreg_quarter[4];
u_int longword; u_short biosreg_half[2];
u_int biosreg_long;
} bios_reg; } bios_reg;
struct bioscallregs { struct bioscallregs {
@ -61,27 +64,42 @@ struct bioscallregs {
bios_reg r_di; bios_reg r_di;
bios_reg r_flags; bios_reg r_flags;
}; };
#define AX r_ax.halfword.hw_lo
#define AX_HI r_ax.halfword.hw_hi #define AL r_ax.biosreg_quarter[BIOSREG_LO]
#define EAX r_ax.longword #define AH r_ax.biosreg_quarter[BIOSREG_HI]
#define BX r_bx.halfword.hw_lo #define AX r_ax.biosreg_half[BIOSREG_LO]
#define BX_HI r_bx.halfword.hw_hi #define AX_HI r_ax.biosreg_half[BIOSREG_HI]
#define EBX r_bx.longword #define EAX r_ax.biosreg_long
#define CX r_cx.halfword.hw_lo
#define CX_HI r_cx.halfword.hw_hi #define BL r_bx.biosreg_quarter[BIOSREG_LO]
#define ECX r_cx.longword #define BH r_bx.biosreg_quarter[BIOSREG_HI]
#define DX r_dx.halfword.hw_lo #define BX r_bx.biosreg_half[BIOSREG_LO]
#define DX_HI r_dx.halfword.hw_hi #define BX_HI r_bx.biosreg_half[BIOSREG_HI]
#define EDX r_dx.longword #define EBX r_bx.biosreg_long
#define SI r_si.halfword.hw_lo
#define SI_HI r_si.halfword.hw_hi #define CL r_cx.biosreg_quarter[BIOSREG_LO]
#define ESI r_si.longword #define CH r_cx.biosreg_quarter[BIOSREG_HI]
#define DI r_di.halfword.hw_lo #define CX r_cx.biosreg_half[BIOSREG_LO]
#define DI_HI r_di.halfword.hw_hi #define CX_HI r_cx.biosreg_half[BIOSREG_HI]
#define EDI r_di.longword #define ECX r_cx.biosreg_long
#define FLAGS r_flags.halfword.hw_lo
#define FLAGS_HI r_flags.halfword.hw_hi #define DL r_dx.biosreg_quarter[BIOSREG_LO]
#define EFLAGS r_flags.longword #define DH r_dx.biosreg_quarter[BIOSREG_HI]
#define DX r_dx.biosreg_half[BIOSREG_LO]
#define DX_HI r_dx.biosreg_half[BIOSREG_HI]
#define EDX r_dx.biosreg_long
#define SI r_si.biosreg_half[BIOSREG_LO]
#define SI_HI r_si.biosreg_half[BIOSREG_HI]
#define ESI r_si.biosreg_long
#define DI r_di.biosreg_half[BIOSREG_LO]
#define DI_HI r_di.biosreg_half[BIOSREG_HI]
#define EDI r_di.biosreg_long
#define FLAGS r_flags.biosreg_half[BIOSREG_LO]
#define FLAGS_HI r_flags.biosreg_half[BIOSREG_HI]
#define EFLAGS r_flags.biosreg_long
void bioscall __P((int /* function*/ , struct bioscallregs * /* regs */)); void bioscall __P((int /* function*/ , struct bioscallregs * /* regs */));
#endif #endif