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

// added by zcr
void disable_irq(int irq);
void enable_irq(int irq);
void init_8259A();
//~zcr

/* protect.c */
void init_prot();
u32 seg2phys(u16 seg);

/* klib.c */
void delay(int time);

/* kernel.asm */
u32 read_cr2();            // add by visual 2016.5.9
void refresh_page_cache(); // add by visual 2016.5.12
// void restart_int();
// void save_context();
void restart_initial();             // added by xw, 18/4/18
void restart_restore();             // added by xw, 18/4/20
void sched();                       // added by xw, 18/4/18
void halt();                        // added by xw, 18/6/11
u32 get_arg(void *uesp, int order); // added by xw, 18/6/18

/* ktest.c */
void initial();

/* keyboard.c */
// added by mingxuan 2019-5-19
void init_kb();
void keyboard_read();

/* tty.c */
// added by mingxuan 2019-5-19
void task_tty();
void tty_write(NTTY *tty, char *buf, int len);
int tty_read(NTTY *tty, char *buf, int len);
void init_tty_main();
NTTY *get_tty(const int nr_tty);

/* printf.c */
// added by mingxuan 2019-5-19
int printf(const char *fmt, ...);

/* vsprintf.c */
// added by mingxuan 2019-5-19
int vsprintf(char *buf, const char *fmt, va_list args);

/* i8259.c */
void put_irq_handler(int irq, irq_handler handler);
void spurious_irq(int irq);

/* clock.c */
void clock_handler(int irq);

/***************************************************************
 * 以下是系统调用相关函数的声明
 ****************************************************************/
/* syscall.asm */
void sys_call(); /* int_handler */
int get_ticks();
int get_pid();               // add by visual 2016.4.6
void *kmalloc(int size);     // edit by visual 2016.5.9
void *kmalloc_4k();          // edit by visual 2016.5.9
void *malloc(int size);      // edit by visual 2016.5.9
void *malloc_4k();           // edit by visual 2016.5.9
int free(void *arg);         // edit by visual 2016.5.9
int free_4k(void *AdddrLin); // edit by visual 2016.5.9
int fork();                  // add by visual 2016.4.8
int pthread(void *arg);      // add by visual 2016.4.11
u32 exec(char *path);        // add by visual 2016.5.16
void yield();                // added by xw, 18/4/19
void sleep(int n);           // added by xw, 18/4/19
void print_E();
void print_F();

/* syscallc.c */                 // edit by visual 2016.4.6
int sys_get_ticks();             /* sys_call */
int sys_get_pid();               // add by visual 2016.4.6
void *sys_kmalloc(int size);     // edit by visual 2016.5.9
void *sys_kmalloc_4k();          // edit by visual 2016.5.9
void *sys_malloc(int size);      // edit by visual 2016.5.9
void *sys_malloc_4k();           // edit by visual 2016.5.9
int sys_free(void *arg);         // edit by visual 2016.5.9
int sys_free_4k(void *AdddrLin); // edit by visual 2016.5.9
int sys_pthread(void *arg);      // add by visual 2016.4.11

/* proc.c */
PROCESS *alloc_PCB();
void free_PCB(PROCESS *p);
void sys_yield();
void sys_sleep(int n);
void sys_wakeup(void *channel);
int ldt_seg_linear(PROCESS *p, int idx);
void *va2la(int pid, void *va);

/* testfunc.c */
void sys_print_E();
void sys_print_F();

/*exec.c*/
u32 sys_exec(char *path); // add by visual 2016.5.23
/*fork.c*/
int sys_fork(); // add by visual 2016.5.25

/***************************************************************
 * 以上是系统调用相关函数的声明
 ****************************************************************/

/*pagepte.c*/
u32 init_page_pte(u32 pid);                                                     // edit by visual 2016.4.28
void page_fault_handler(u32 vec_no, u32 err_code, u32 eip, u32 cs, u32 eflags); // add by visual 2016.4.19
u32 get_pde_index(u32 AddrLin);                                                 // add by visual 2016.4.28
u32 get_pte_index(u32 AddrLin);
u32 get_pde_phy_addr(u32 pid);
u32 get_pte_phy_addr(u32 pid, u32 AddrLin);
u32 get_page_phy_addr(u32 pid, u32 AddrLin); // 线性地址
u32 pte_exist(u32 PageTblAddrPhy, u32 AddrLin);
u32 phy_exist(u32 PageTblPhyAddr, u32 AddrLin);
void write_page_pde(u32 PageDirPhyAddr, u32 AddrLin, u32 TblPhyAddr, u32 Attribute);
void write_page_pte(u32 TblPhyAddr, u32 AddrLin, u32 PhyAddr, u32 Attribute);
u32 vmalloc(u32 size);
int lin_mapping_phy(u32 AddrLin, u32 phy_addr, u32 pid, u32 pde_Attribute, u32 pte_Attribute); // edit by visual 2016.5.19
void clear_kernel_pagepte_low();                                                               // add by visual 2016.5.12