protect.h

这是《自己动手写操作系统》的原文件和代码

/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
                            protect.h
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
                                                    Forrest Yu, 2005
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/

#ifndef	_TINIX_PROTECT_H_
#define	_TINIX_PROTECT_H_


/* 存储段描述符/系统段描述符 */
typedef struct s_descriptor		/* 共 8 个字节 */
{
	t_16	limit_low;		/* Limit */
	t_16	base_low;		/* Base */
	t_8	base_mid;		/* Base */
	t_8	attr1;			/* P(1) DPL(2) DT(1) TYPE(4) */
	t_8	limit_high_attr2;	/* G(1) D(1) 0(1) AVL(1) LimitHigh(4) */
	t_8	base_high;		/* Base */
}DESCRIPTOR;



#endif /* _TINIX_PROTECT_H_ */