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EPOS

Experimental Protected-mode Operating System

int.h
/*
EPOS
http://www.atanaslaskov.com/epos/

FILE:           int.h
DESCRIPTION:    Interrupts manager

BSD LICENSE
Copyright (c) 2006, Atanas Laskov
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
   1. Redistributions of source code must retain the above copyright notice,
   this list of conditions and the following disclaimer.
   2. Redistributions in binary form must reproduce the above copyright notice,
   this list of conditions and the following disclaimer in the documentation
   and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL ATANAS LASKOV BE LIABLE FOR ANY
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

#ifndef IDT_H
#define IDT_H

#define INT_CANBESET_CNT 48

// Interrupt handler format
//
union ProcedureAddress{
    void (*fptr)();
    void (*fptrex)(unsigned long nint);
    unsigned long dwAddress;
};
struct HandledInterrupt{
    unsigned char bUseExFun;
    union ProcedureAddress adr;
};

void InitializeInterrupt();

extern char g_bAutoResetIRQ;

// Get interrupt handler
struct HandledInterrupt* getvector(unsigned long nint);

// Set interrupt handler
//
void setvector(unsigned long nint, void (*fptr)());
void setvectorex(unsigned long nint, void (*fptr)(unsigned long nint));

#endif //#ifndef IDT_H