asm.h

WinAoE is an open source GPLv3 driver for using AoE (ATA over Ethernet) on Microsoft Windows

/*
  Copyright 2006-2008, V.
  For contact information, see http://winaoe.org/

  This file is part of WinAoE.

  WinAoE is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation, either version 3 of the License, or
  (at your option) any later version.

  WinAoE is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with WinAoE.  If not, see <http://www.gnu.org/licenses/>.
*/

asm(".code16gcc");
#ifndef _ASM_H
#define _ASM_H

#include "lib.h"

typedef struct s_cpu {
  unsigned short gs;
  unsigned short fs;
  unsigned short es;
  unsigned short ds;
  unsigned int edi;
  unsigned int esi;
  unsigned int edx;
  unsigned int ecx;
  unsigned int ebx;
  unsigned int eax;
  union {
    unsigned int eflags;
    unsigned short flags;
  };
} __attribute__((__packed__)) t_cpu;

extern void* end;		// end of image from linker
//extern t_cpu cpu;		// cpu state struct in asm.S
extern unsigned short segment;	// target segment in asm.S
extern int volatile oldint13;
extern int volatile gotisr;
extern int volatile timer;
extern int irq;

int GETVECTOR(int i);
void SETVECTOR(int i, int v);
int _CHAININTERRUPT(int v, t_cpu *cpu);

#ifdef __MINGW32__
#  define INTERRUPTPROTO(x) \
  extern void _##x(t_cpu *cpu); extern void x()
#  else
#  define INTERRUPTPROTO(x) \
  ".type __" #x ", @function\n" \
  ".size __" #x ", .-__" #x "\n" \
  extern void _##x(t_cpu *cpu); extern void x()
#endif
#define INTERRUPT(x) asm("\n" \
  ".text\n" \
  ".globl __" #x "\n" \
  "__" #x ":\n" \
  "	call	_switchstack\n" \
  "	call	_pushcpu\n" \
  "	cli\n" \
  "	movzwl	%sp, %eax\n" \
  "	pushl	%eax\n" \
  "	movw	%cs:_segment, %ds\n" \
  "	movw	%cs:_segment, %es\n" \
  "	call	_" #x "\n" \
  "	addw	$4, %sp\n" \
  "	call	_popcpu\n" \
  "	call	_restorestack\n" \
  ".code16\n" \
  "	lret	$2\n" \
  ".code16gcc\n" \
  "0:	lret	$2\n" \
); \
void x (t_cpu *cpu)

void int8();						// in asm.S
void int13();						// in asm.S
void isr();						// in asm.S
void nmi();						// in asm.S
void i0();						// in asm.S
void i1();						// in asm.S
void i2();						// in asm.S
void i3();						// in asm.S
void i4();						// in asm.S
void i5();						// in asm.S
void i6();						// in asm.S
void i7();						// in asm.S

#endif