/* * 'tty.h' defines some structures used by tty_io.c and some defines. * * NOTE! Don't touch this without checking that nothing in rs_io.s or * con_io.s breaks. Some constants are hardwired into the system (mainly * offsets into 'tty_queue' */ #ifndef _TTY_H #define _TTY_H #include <asm/system.h> #define NR_CONSOLES 8 #define NR_SERIALS 4 #define NR_PTYS 4 /* * This character is the same as _POSIX_VDISABLE: it cannot be used as * a c_cc[] character, but indicates that a particular special character * isn't in use (eg VINTR ahs no character etc) */ #define __DISABLED_CHAR '\0' #include <termios.h> #define TTY_BUF_SIZE 2048 struct tty_queue { unsigned long data; unsigned long head; unsigned long tail; struct task_struct * proc_list; unsigned char buf[TTY_BUF_SIZE]; }; struct serial_struct { unsigned short type; unsigned short line; unsigned short port; unsigned short irq; struct tty_struct * tty; }; /* * These are the supported serial types. */ #define PORT_UNKNOWN 0 #define PORT_8250 1 #define PORT_16450 2 #define PORT_16550 3 #define PORT_16550A 4 #define IS_A_CONSOLE(min) (((min) & 0xC0) == 0x00) #define IS_A_SERIAL(min) (((min) & 0xC0) == 0x40) #define IS_A_PTY(min) ((min) & 0x80) #define IS_A_PTY_MASTER(min) (((min) & 0xC0) == 0x80) #define IS_A_PTY_SLAVE(min) (((min) & 0xC0) == 0xC0) #define PTY_OTHER(min) ((min) ^ 0x40) #define INC(a) ((a) = ((a)+1) & (TTY_BUF_SIZE-1)) #define DEC(a) ((a) = ((a)-1) & (TTY_BUF_SIZE-1)) #define EMPTY(a) ((a)->head == (a)->tail) #define LEFT(a) (((a)->tail-(a)->head-1)&(TTY_BUF_SIZE-1)) #define LAST(a) ((a)->buf[(TTY_BUF_SIZE-1)&((a)->head-1)]) #define FULL(a) (!LEFT(a)) #define CHARS(a) (((a)->head-(a)->tail)&(TTY_BUF_SIZE-1)) extern void put_tty_queue(char c, struct tty_queue * queue); extern int get_tty_queue(struct tty_queue * queue); #define PUTCH(c,queue) put_tty_queue((c),(queue)) #define GETCH(queue) get_tty_queue(queue) #define INTR_CHAR(tty) ((tty)->termios.c_cc[VINTR]) #define QUIT_CHAR(tty) ((tty)->termios.c_cc[VQUIT]) #define ERASE_CHAR(tty) ((tty)->termios.c_cc[VERASE]) #define KILL_CHAR(tty) ((tty)->termios.c_cc[VKILL]) #define EOF_CHAR(tty) ((tty)->termios.c_cc[VEOF]) #define START_CHAR(tty) ((tty)->termios.c_cc[VSTART]) #define STOP_CHAR(tty) ((tty)->termios.c_cc[VSTOP]) #define SUSPEND_CHAR(tty) ((tty)->termios.c_cc[VSUSP]) #define _L_FLAG(tty,f) ((tty)->termios.c_lflag & f) #define _I_FLAG(tty,f) ((tty)->termios.c_iflag & f) #define _O_FLAG(tty,f) ((tty)->termios.c_oflag & f) #define L_CANON(tty) _L_FLAG((tty),ICANON) #define L_ISIG(tty) _L_FLAG((tty),ISIG) #define L_ECHO(tty) _L_FLAG((tty),ECHO) #define L_ECHOE(tty) _L_FLAG((tty),ECHOE) #define L_ECHOK(tty) _L_FLAG((tty),ECHOK) #define L_ECHONL(tty) _L_FLAG((tty),ECHONL) #define L_ECHOCTL(tty) _L_FLAG((tty),ECHOCTL) #define L_ECHOKE(tty) _L_FLAG((tty),ECHOKE) #define L_TOSTOP(tty) _L_FLAG((tty),TOSTOP) #define I_UCLC(tty) _I_FLAG((tty),IUCLC) #define I_NLCR(tty) _I_FLAG((tty),INLCR) #define I_CRNL(tty) _I_FLAG((tty),ICRNL) #define I_NOCR(tty) _I_FLAG((tty),IGNCR) #define I_IXON(tty) _I_FLAG((tty),IXON) #define I_STRP(tty) _I_FLAG((tty),ISTRIP) #define O_POST(tty) _O_FLAG((tty),OPOST) #define O_NLCR(tty) _O_FLAG((tty),ONLCR) #define O_CRNL(tty) _O_FLAG((tty),OCRNL) #define O_NLRET(tty) _O_FLAG((tty),ONLRET) #define O_LCUC(tty) _O_FLAG((tty),OLCUC) #define C_SPEED(tty) ((tty)->termios.c_cflag & CBAUD) #define C_HUP(tty) (C_SPEED((tty)) == B0) struct tty_struct { struct termios termios; int pgrp; int session; int stopped; int flags; int count; struct winsize winsize; void (*write)(struct tty_struct * tty); struct tty_struct *link; struct tty_queue *read_q; struct tty_queue *write_q; struct tty_queue *secondary; }; /* * so that interrupts won't be able to mess up the * queues, copy_to_cooked must be atomic with repect * to itself, as must tty->write. These are the flag bits. */ #define TTY_WRITE_BUSY 1 #define TTY_READ_BUSY 2 #define TTY_CR_PENDING 4 #define TTY_WRITE_FLUSH(tty) tty_write_flush((tty)) #define TTY_READ_FLUSH(tty) tty_read_flush((tty)) extern void tty_write_flush(struct tty_struct *); extern void tty_read_flush(struct tty_struct *); extern struct tty_struct tty_table[]; extern struct serial_struct serial_table[]; extern struct tty_struct * redirect; extern int fg_console; extern unsigned long video_num_columns; extern unsigned long video_num_lines; #define TTY_TABLE(nr) \ (tty_table + ((nr) ? (((nr) < 64)? (nr)-1:(nr)) : fg_console)) /* intr=^C quit=^| erase=del kill=^U eof=^D vtime=\0 vmin=\1 sxtc=\0 start=^Q stop=^S susp=^Z eol=\0 reprint=^R discard=^U werase=^W lnext=^V eol2=\0 */ #define INIT_C_CC "\003\034\177\025\004\0\1\0\021\023\032\0\022\017\027\026\0" extern long rs_init(long); extern long lp_init(long); extern long con_init(long); extern long tty_init(long); extern void flush_input(struct tty_struct * tty); extern void flush_output(struct tty_struct * tty); extern void copy_to_cooked(struct tty_struct * tty); extern int tty_ioctl(struct inode *, struct file *, unsigned int, unsigned int); extern int is_orphaned_pgrp(int pgrp); extern int is_ignored(int sig); extern int tty_signal(int sig, struct tty_struct *tty); extern int kill_pg(int pgrp, int sig, int priv); /* tty write functions */ extern void rs_write(struct tty_struct * tty); extern void con_write(struct tty_struct * tty); extern void mpty_write(struct tty_struct * tty); extern void spty_write(struct tty_struct * tty); /* serial.c */ extern int serial_open(unsigned int line, struct file * filp); extern void serial_close(unsigned int line, struct file * filp); extern void change_speed(unsigned int line); extern void send_break(unsigned int line); extern int get_serial_info(unsigned int, struct serial_struct *); extern int set_serial_info(unsigned int, struct serial_struct *); /* pty.c */ extern int pty_open(unsigned int dev, struct file * filp); extern void pty_close(unsigned int dev, struct file * filp); /* console.c */ void update_screen(int new_console); void blank_screen(void); void unblank_screen(void); #endif