ORANGES'_自己动手写操作系统_光盘源代码.zip下载

/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ global.h ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Forrest Yu, 2005 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/ /* EXTERN is defined as extern except in global.c */ #ifdef GLOBAL_VARIABLES_HERE #undef EXTERN #define EXTERN #endif EXTERN int ticks; EXTERN int disp_pos; EXTERN u8 gdt_ptr[6]; /* 0~15:Limit 16~47:Base */ EXTERN struct descriptor gdt[GDT_SIZE]; EXTERN u8 idt_ptr[6]; /* 0~15:Limit 16~47:Base */ EXTERN struct gate idt[IDT_SIZE]; EXTERN u32 k_reenter; EXTERN int current_console; EXTERN int key_pressed; /** * used for clock_handler * to wake up TASK_TTY when * a key is pressed */ EXTERN struct tss tss; EXTERN struct proc* p_proc_ready; extern char task_stack[]; extern struct proc proc_table[]; extern struct task task_table[]; extern struct task user_proc_table[]; extern irq_handler irq_table[]; extern TTY tty_table[]; extern CONSOLE console_table[]; /* MM */ EXTERN MESSAGE mm_msg; extern u8 * mmbuf; extern const int MMBUF_SIZE; EXTERN int memory_size; /* FS */ EXTERN struct file_desc f_desc_table[NR_FILE_DESC]; EXTERN struct inode inode_table[NR_INODE]; EXTERN struct super_block super_block[NR_SUPER_BLOCK]; extern u8 * fsbuf; extern const int FSBUF_SIZE; EXTERN MESSAGE fs_msg; EXTERN struct proc * pcaller; EXTERN struct inode * root_inode; extern struct dev_drv_map dd_map[]; /* for test only */ extern char * logbuf; extern const int LOGBUF_SIZE; extern char * logdiskbuf; extern const int LOGDISKBUF_SIZE;