global.c

参照MINIX3写的操作系统 用GCC+NASM+BOCHS开发

#include "toyos.h"

PUBLIC   t_8         gdt_ptr[6];
PUBLIC   DESCRIPTOR  gdt[GDT_SIZE];
PUBLIC   t_8         idt_ptr[6];
PUBLIC   GATE        idt[IDT_SIZE];
PUBLIC   TSS         tss;
PUBLIC	IrqFuction  IrqTable[NR_IRQ];
PUBLIC	int Disp_pos;
PUBLIC	int Head,Tail;
PUBLIC	int ReEnter= 0;
PUBLIC	int LostTicks=0;
PUBLIC PROCESS  *usrProc;     //指向用户进程队列的头指针
PUBLIC PROCESS  *pCurrentProc;//指向当前运行的进程
PUBLIC PROCESS  *ReadyProc;
PUBLIC structAlloc structAllocer;/*用于管理 structAlloc*/
PUBLIC hole *head;							 /*The head of hole*/