idt.h

来自「一个操作系统的源代码」· C头文件 代码 · 共 52 行

/** idt.h
 **
 ** Original Author: Kasper Verdich Lund
 ** Date: 10/11/99
 **
 ** Description:
 ** Interrupt Descriptor Table functions
 **
 ** This program 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
 ** 2 of the License, or (at your option) any later version.
 **
 ** This program is distributed in the hope that it will be
 ** useful, but WITHOUT ANY WARRANTY; without even the implied
 ** warranty or 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 this program; if not, write to the
 ** Free Software Foundation, Inc., 59 Temple Place, Suite 330,
 ** Boston, MA 02111-1307 USA
 **
 *********************************************************Apostle OS**/

#ifndef __IDT_H_
#define __IDT_H_

#include <types.h>

#define IDT_SIZE 256

typedef struct gate 
{
  word offset0_15;
  word selector;
  byte zero;
  byte type : 5;
  byte dpl : 2;
  byte p : 1;
  word offset16_31;
} __attribute__ ((packed)) gate;

extern gate *IDT;
extern void setupIDT(void);
extern void interruptIDT(gate *g, word selector, dword offset, byte dpl);
extern void trapIDT(gate *g, word selector, dword offset, byte dpl);
extern void taskIDT(gate *g, word selector, byte dpl);

#endif /* __IDT_H_ */