add directory Linux-0.98
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312
Linux-0.98/Yggdrasil-0.98.3/usr/include/linux/tty.h
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312
Linux-0.98/Yggdrasil-0.98.3/usr/include/linux/tty.h
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#ifndef _LINUX_TTY_H
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#define _LINUX_TTY_H
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/*
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* 'tty.h' defines some structures used by tty_io.c and some defines.
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*/
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#include <linux/termios.h>
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#include <asm/system.h>
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#define NR_CONSOLES 8
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/*
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* These are set up by the setup-routine at boot-time:
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*/
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struct screen_info {
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unsigned char orig_x;
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unsigned char orig_y;
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unsigned char unused1[2];
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unsigned short orig_video_page;
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unsigned char orig_video_mode;
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unsigned char orig_video_cols;
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unsigned short orig_video_ega_ax;
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unsigned short orig_video_ega_bx;
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unsigned short orig_video_ega_cx;
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unsigned char orig_video_lines;
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};
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extern struct screen_info screen_info;
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#define ORIG_X (screen_info.orig_x)
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#define ORIG_Y (screen_info.orig_y)
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#define ORIG_VIDEO_PAGE (screen_info.orig_video_page)
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#define ORIG_VIDEO_MODE (screen_info.orig_video_mode)
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#define ORIG_VIDEO_COLS (screen_info.orig_video_cols)
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#define ORIG_VIDEO_EGA_AX (screen_info.orig_video_ega_ax)
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#define ORIG_VIDEO_EGA_BX (screen_info.orig_video_ega_bx)
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#define ORIG_VIDEO_EGA_CX (screen_info.orig_video_ega_cx)
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#define ORIG_VIDEO_LINES (screen_info.orig_video_lines)
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#define VIDEO_TYPE_MDA 0x10 /* Monochrome Text Display */
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#define VIDEO_TYPE_CGA 0x11 /* CGA Display */
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#define VIDEO_TYPE_EGAM 0x20 /* EGA/VGA in Monochrome Mode */
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#define VIDEO_TYPE_EGAC 0x21 /* EGA/VGA in Color Mode */
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/*
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* This character is the same as _POSIX_VDISABLE: it cannot be used as
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* a c_cc[] character, but indicates that a particular special character
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* isn't in use (eg VINTR ahs no character etc)
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*/
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#define __DISABLED_CHAR '\0'
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/*
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* See comment for the tty_struct structure before changing
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* TTY_BUF_SIZE. Actually, there should be different sized tty_queue
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* structures for different purposes. 1024 bytes for the transmit
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* queue is way overkill. TYT, 9/14/92
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*/
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#define TTY_BUF_SIZE 1024 /* Must be a power of 2 */
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struct tty_queue {
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unsigned long data;
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unsigned long head;
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unsigned long tail;
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struct wait_queue * proc_list;
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unsigned char buf[TTY_BUF_SIZE];
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};
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struct serial_struct {
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int type;
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int line;
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int port;
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int irq;
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int flags;
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int xmit_fifo_size;
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int custom_divisor;
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int reserved[8];
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};
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/*
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* These are the supported serial types.
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*/
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#define PORT_UNKNOWN 0
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#define PORT_8250 1
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#define PORT_16450 2
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#define PORT_16550 3
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#define PORT_16550A 4
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/*
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* Definitions for async_struct (and serial_struct) flags field
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*/
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#define ASYNC_NOSCRATCH 0x0001 /* 16XXX UART with no scratch register */
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#define ASYNC_FOURPORT 0x0002 /* Set OU1, OUT2 per AST Fourport settings */
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#define ASYNC_SAK 0x0004 /* Secure Attention Key (Orange book) */
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#define ASYNC_SPD_MASK 0x0030
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#define ASYNC_SPD_HI 0x0010 /* Use 56000 instead of 38400 bps */
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#define ASYNC_SPD_VHI 0x0020 /* Use 115200 instead of 38400 bps */
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#define ASYNC_SPD_CUST 0x0030 /* Use user-specified divisor */
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#define IS_A_CONSOLE(min) (((min) & 0xC0) == 0x00)
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#define IS_A_SERIAL(min) (((min) & 0xC0) == 0x40)
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#define IS_A_PTY(min) ((min) & 0x80)
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#define IS_A_PTY_MASTER(min) (((min) & 0xC0) == 0x80)
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#define IS_A_PTY_SLAVE(min) (((min) & 0xC0) == 0xC0)
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#define PTY_OTHER(min) ((min) ^ 0x40)
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#define SL_TO_DEV(line) ((line) | 0x40)
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#define DEV_TO_SL(min) ((min) & 0x3F)
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#define INC(a) ((a) = ((a)+1) & (TTY_BUF_SIZE-1))
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#define DEC(a) ((a) = ((a)-1) & (TTY_BUF_SIZE-1))
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#define EMPTY(a) ((a)->head == (a)->tail)
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#define LEFT(a) (((a)->tail-(a)->head-1)&(TTY_BUF_SIZE-1))
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#define LAST(a) ((a)->buf[(TTY_BUF_SIZE-1)&((a)->head-1)])
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#define FULL(a) (!LEFT(a))
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#define CHARS(a) (((a)->head-(a)->tail)&(TTY_BUF_SIZE-1))
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extern void put_tty_queue(char c, struct tty_queue * queue);
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extern int get_tty_queue(struct tty_queue * queue);
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#define INTR_CHAR(tty) ((tty)->termios->c_cc[VINTR])
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#define QUIT_CHAR(tty) ((tty)->termios->c_cc[VQUIT])
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#define ERASE_CHAR(tty) ((tty)->termios->c_cc[VERASE])
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#define KILL_CHAR(tty) ((tty)->termios->c_cc[VKILL])
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#define EOF_CHAR(tty) ((tty)->termios->c_cc[VEOF])
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#define START_CHAR(tty) ((tty)->termios->c_cc[VSTART])
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#define STOP_CHAR(tty) ((tty)->termios->c_cc[VSTOP])
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#define SUSPEND_CHAR(tty) ((tty)->termios->c_cc[VSUSP])
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#define _L_FLAG(tty,f) ((tty)->termios->c_lflag & f)
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#define _I_FLAG(tty,f) ((tty)->termios->c_iflag & f)
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#define _O_FLAG(tty,f) ((tty)->termios->c_oflag & f)
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#define L_CANON(tty) _L_FLAG((tty),ICANON)
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#define L_ISIG(tty) _L_FLAG((tty),ISIG)
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#define L_ECHO(tty) _L_FLAG((tty),ECHO)
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#define L_ECHOE(tty) _L_FLAG((tty),ECHOE)
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#define L_ECHOK(tty) _L_FLAG((tty),ECHOK)
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#define L_ECHONL(tty) _L_FLAG((tty),ECHONL)
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#define L_ECHOCTL(tty) _L_FLAG((tty),ECHOCTL)
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#define L_ECHOKE(tty) _L_FLAG((tty),ECHOKE)
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#define L_TOSTOP(tty) _L_FLAG((tty),TOSTOP)
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#define I_UCLC(tty) _I_FLAG((tty),IUCLC)
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#define I_NLCR(tty) _I_FLAG((tty),INLCR)
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#define I_CRNL(tty) _I_FLAG((tty),ICRNL)
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#define I_NOCR(tty) _I_FLAG((tty),IGNCR)
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#define I_IXON(tty) _I_FLAG((tty),IXON)
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#define I_IXANY(tty) _I_FLAG((tty),IXANY)
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#define I_STRP(tty) _I_FLAG((tty),ISTRIP)
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#define O_POST(tty) _O_FLAG((tty),OPOST)
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#define O_NLCR(tty) _O_FLAG((tty),ONLCR)
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#define O_CRNL(tty) _O_FLAG((tty),OCRNL)
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#define O_NLRET(tty) _O_FLAG((tty),ONLRET)
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#define O_LCUC(tty) _O_FLAG((tty),OLCUC)
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#define C_SPEED(tty) ((tty)->termios->c_cflag & CBAUD)
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#define C_HUP(tty) (C_SPEED((tty)) == B0)
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/*
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* Where all of the state associated with a tty is kept while the tty
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* is open. Since the termios state should be kept even if the tty
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* has been closed --- for things like the baud rate, etc --- it is
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* not stored here, but rather a pointer to the real state is stored
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* here. Possible the winsize structure should have the same
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* treatment, but (1) the default 80x24 is usually right and (2) it's
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* most often used by a windowing system, which will set the correct
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* size each time the window is created or resized anyway.
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* IMPORTANT: since this structure is dynamically allocated, it must
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* be no larger than 4096 bytes. Changing TTY_BUF_SIZE will change
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* the size of this structure, and it needs to be done with care.
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* - TYT, 9/14/92
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*/
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struct tty_struct {
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struct termios *termios;
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int pgrp;
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int session;
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unsigned char stopped:1, status_changed:1, packet:1;
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unsigned char ctrl_status;
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short line;
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int flags;
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int count;
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struct winsize winsize;
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int (*open)(struct tty_struct * tty, struct file * filp);
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void (*close)(struct tty_struct * tty, struct file * filp);
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void (*write)(struct tty_struct * tty);
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int (*ioctl)(struct tty_struct *tty, struct file * file,
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unsigned int cmd, unsigned int arg);
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void (*throttle)(struct tty_struct * tty, int status);
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struct tty_struct *link;
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struct tty_queue read_q;
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struct tty_queue write_q;
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struct tty_queue secondary;
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};
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/*
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* These are the different types of thottle status which can be sent
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* to the low-level tty driver. The tty_io.c layer is responsible for
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* notifying the low-level tty driver of the following conditions:
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* secondary queue full, secondary queue available, and read queue
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* available. The low-level driver must send the read queue full
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* command to itself, if it is interested in that condition.
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*
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* Note that the low-level tty driver may elect to ignore one or both
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* of these conditions; normally, however, it will use ^S/^Q or some
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* sort of hardware flow control to regulate the input to try to avoid
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* overflow. While the low-level driver is responsible for all
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* receiving flow control, note that the ^S/^Q handling (but not
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* hardware flow control) is handled by the upper layer, in
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* copy_to_cooked.
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*/
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#define TTY_THROTTLE_SQ_FULL 1
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#define TTY_THROTTLE_SQ_AVAIL 2
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#define TTY_THROTTLE_RQ_FULL 3
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#define TTY_THROTTLE_RQ_AVAIL 4
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/*
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* This defines the low- and high-watermarks for the various conditions.
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* Again, the low-level driver is free to ignore any of these, and has
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* to implement RQ_THREHOLD_LW for itself if it wants it.
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*/
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#define SQ_THRESHOLD_LW 16
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#define SQ_THRESHOLD_HW 768
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#define RQ_THRESHOLD_LW 16
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#define RQ_THRESHOLD_HW 768
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/*
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* These bits are used in the flags field of the tty structure.
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*
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* So that interrupts won't be able to mess up the queues,
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* copy_to_cooked must be atomic with repect to itself, as must
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* tty->write. Thus, you must use the inline functions set_bit() and
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* clear_bit() to make things atomic.
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*/
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#define TTY_WRITE_BUSY 0
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#define TTY_READ_BUSY 1
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#define TTY_CR_PENDING 2
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#define TTY_SQ_THROTTLED 3
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#define TTY_RQ_THROTTLED 4
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#define TTY_WRITE_FLUSH(tty) tty_write_flush((tty))
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#define TTY_READ_FLUSH(tty) tty_read_flush((tty))
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extern void tty_write_flush(struct tty_struct *);
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extern void tty_read_flush(struct tty_struct *);
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extern struct tty_struct *tty_table[];
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extern struct tty_struct * redirect;
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extern int fg_console;
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extern unsigned long video_num_columns;
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extern unsigned long video_num_lines;
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extern struct wait_queue * keypress_wait;
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#define TTY_TABLE_IDX(nr) ((nr) ? (nr) : (fg_console+1))
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#define TTY_TABLE(nr) (tty_table[TTY_TABLE_IDX(nr)])
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/* intr=^C quit=^| erase=del kill=^U
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eof=^D vtime=\0 vmin=\1 sxtc=\0
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start=^Q stop=^S susp=^Z eol=\0
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reprint=^R discard=^U werase=^W lnext=^V
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eol2=\0
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*/
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#define INIT_C_CC "\003\034\177\025\004\0\1\0\021\023\032\0\022\017\027\026\0"
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extern long rs_init(long);
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extern long lp_init(long);
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extern long con_init(long);
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extern long tty_init(long);
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extern void flush_input(struct tty_struct * tty);
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extern void flush_output(struct tty_struct * tty);
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extern void wait_until_sent(struct tty_struct * tty);
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extern void copy_to_cooked(struct tty_struct * tty);
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extern int tty_ioctl(struct inode *, struct file *, unsigned int, unsigned int);
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extern int is_orphaned_pgrp(int pgrp);
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extern int is_ignored(int sig);
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extern int tty_signal(int sig, struct tty_struct *tty);
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extern int kill_pg(int pgrp, int sig, int priv);
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extern void do_SAK(struct tty_struct *tty);
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/* tty write functions */
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extern void rs_write(struct tty_struct * tty);
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extern void con_write(struct tty_struct * tty);
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/* serial.c */
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extern int rs_open(struct tty_struct * tty, struct file * filp);
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extern void change_speed(unsigned int line);
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/* pty.c */
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extern int pty_open(struct tty_struct * tty, struct file * filp);
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/* console.c */
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extern int con_open(struct tty_struct * tty, struct file * filp);
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extern void update_screen(int new_console);
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extern void blank_screen(void);
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extern void unblank_screen(void);
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/* vt.c */
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extern int vt_ioctl(struct tty_struct *tty, struct file * file,
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unsigned int cmd, unsigned int arg);
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#endif
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