include/linux/tty.h

/* */
This source file includes following definitions.
set_bit
clear_bit
   1 #ifndef _LINUX_TTY_H
   2 #define _LINUX_TTY_H
   3 
   4 /*
   5  * 'tty.h' defines some structures used by tty_io.c and some defines.
   6  *
   7  * NOTE! Don't touch this without checking that nothing in rs_io.s or
   8  * con_io.s breaks. Some constants are hardwired into the system (mainly
   9  * offsets into 'tty_queue'
  10  */
  11 
  12 #include <linux/termios.h>
  13 
  14 #include <asm/system.h>
  15 
  16 #define NR_CONSOLES     8
  17 #define NR_SERIALS      4
  18 #define NR_PTYS         4
  19 
  20 /*
  21  * These are set up by the setup-routine at boot-time:
  22  */
  23 
  24 struct screen_info {
  25         unsigned char  orig_x;
  26         unsigned char  orig_y;
  27         unsigned char  unused1[2];
  28         unsigned short orig_video_page;
  29         unsigned char  orig_video_mode;
  30         unsigned char  orig_video_cols;
  31         unsigned short orig_video_ega_ax;
  32         unsigned short orig_video_ega_bx;
  33         unsigned short orig_video_ega_cx;
  34         unsigned char  orig_video_lines;
  35 };
  36 
  37 extern struct screen_info screen_info;
  38 
  39 #define ORIG_X                  (screen_info.orig_x)
  40 #define ORIG_Y                  (screen_info.orig_y)
  41 #define ORIG_VIDEO_PAGE         (screen_info.orig_video_page)
  42 #define ORIG_VIDEO_MODE         (screen_info.orig_video_mode)
  43 #define ORIG_VIDEO_COLS         (screen_info.orig_video_cols)
  44 #define ORIG_VIDEO_EGA_AX       (screen_info.orig_video_ega_ax)
  45 #define ORIG_VIDEO_EGA_BX       (screen_info.orig_video_ega_bx)
  46 #define ORIG_VIDEO_EGA_CX       (screen_info.orig_video_ega_cx)
  47 #define ORIG_VIDEO_LINES        (screen_info.orig_video_lines)
  48 
  49 #define VIDEO_TYPE_MDA          0x10    /* Monochrome Text Display      */
  50 #define VIDEO_TYPE_CGA          0x11    /* CGA Display                  */
  51 #define VIDEO_TYPE_EGAM         0x20    /* EGA/VGA in Monochrome Mode   */
  52 #define VIDEO_TYPE_EGAC         0x21    /* EGA/VGA in Color Mode        */
  53 
  54 /*
  55  * This character is the same as _POSIX_VDISABLE: it cannot be used as
  56  * a c_cc[] character, but indicates that a particular special character
  57  * isn't in use (eg VINTR ahs no character etc)
  58  */
  59 #define __DISABLED_CHAR '\0'
  60 
  61 #define TTY_BUF_SIZE 2048
  62 
  63 struct tty_queue {
  64         unsigned long data;
  65         unsigned long head;
  66         unsigned long tail;
  67         struct wait_queue * proc_list;
  68         unsigned char buf[TTY_BUF_SIZE];
  69 };
  70 
  71 struct serial_struct {
  72         unsigned short type;
  73         unsigned short line;
  74         unsigned short port;
  75         unsigned short irq;
  76         struct tty_struct * tty;
  77 };
  78 
  79 /*
  80  * These are the supported serial types.
  81  */
  82 #define PORT_UNKNOWN    0
  83 #define PORT_8250       1
  84 #define PORT_16450      2
  85 #define PORT_16550      3
  86 #define PORT_16550A     4
  87 
  88 #define IS_A_CONSOLE(min)       (((min) & 0xC0) == 0x00)
  89 #define IS_A_SERIAL(min)        (((min) & 0xC0) == 0x40)
  90 #define IS_A_PTY(min)           ((min) & 0x80)
  91 #define IS_A_PTY_MASTER(min)    (((min) & 0xC0) == 0x80)
  92 #define IS_A_PTY_SLAVE(min)     (((min) & 0xC0) == 0xC0)
  93 #define PTY_OTHER(min)          ((min) ^ 0x40)
  94 
  95 #define INC(a) ((a) = ((a)+1) & (TTY_BUF_SIZE-1))
  96 #define DEC(a) ((a) = ((a)-1) & (TTY_BUF_SIZE-1))
  97 #define EMPTY(a) ((a)->head == (a)->tail)
  98 #define LEFT(a) (((a)->tail-(a)->head-1)&(TTY_BUF_SIZE-1))
  99 #define LAST(a) ((a)->buf[(TTY_BUF_SIZE-1)&((a)->head-1)])
 100 #define FULL(a) (!LEFT(a))
 101 #define CHARS(a) (((a)->head-(a)->tail)&(TTY_BUF_SIZE-1))
 102 
 103 extern void put_tty_queue(char c, struct tty_queue * queue);
 104 extern int get_tty_queue(struct tty_queue * queue);
 105 
 106 #define INTR_CHAR(tty) ((tty)->termios.c_cc[VINTR])
 107 #define QUIT_CHAR(tty) ((tty)->termios.c_cc[VQUIT])
 108 #define ERASE_CHAR(tty) ((tty)->termios.c_cc[VERASE])
 109 #define KILL_CHAR(tty) ((tty)->termios.c_cc[VKILL])
 110 #define EOF_CHAR(tty) ((tty)->termios.c_cc[VEOF])
 111 #define START_CHAR(tty) ((tty)->termios.c_cc[VSTART])
 112 #define STOP_CHAR(tty) ((tty)->termios.c_cc[VSTOP])
 113 #define SUSPEND_CHAR(tty) ((tty)->termios.c_cc[VSUSP])
 114 
 115 #define _L_FLAG(tty,f)  ((tty)->termios.c_lflag & f)
 116 #define _I_FLAG(tty,f)  ((tty)->termios.c_iflag & f)
 117 #define _O_FLAG(tty,f)  ((tty)->termios.c_oflag & f)
 118 
 119 #define L_CANON(tty)    _L_FLAG((tty),ICANON)
 120 #define L_ISIG(tty)     _L_FLAG((tty),ISIG)
 121 #define L_ECHO(tty)     _L_FLAG((tty),ECHO)
 122 #define L_ECHOE(tty)    _L_FLAG((tty),ECHOE)
 123 #define L_ECHOK(tty)    _L_FLAG((tty),ECHOK)
 124 #define L_ECHONL(tty)   _L_FLAG((tty),ECHONL)
 125 #define L_ECHOCTL(tty)  _L_FLAG((tty),ECHOCTL)
 126 #define L_ECHOKE(tty)   _L_FLAG((tty),ECHOKE)
 127 #define L_TOSTOP(tty)   _L_FLAG((tty),TOSTOP)
 128 
 129 #define I_UCLC(tty)     _I_FLAG((tty),IUCLC)
 130 #define I_NLCR(tty)     _I_FLAG((tty),INLCR)
 131 #define I_CRNL(tty)     _I_FLAG((tty),ICRNL)
 132 #define I_NOCR(tty)     _I_FLAG((tty),IGNCR)
 133 #define I_IXON(tty)     _I_FLAG((tty),IXON)
 134 #define I_STRP(tty)     _I_FLAG((tty),ISTRIP)
 135 
 136 #define O_POST(tty)     _O_FLAG((tty),OPOST)
 137 #define O_NLCR(tty)     _O_FLAG((tty),ONLCR)
 138 #define O_CRNL(tty)     _O_FLAG((tty),OCRNL)
 139 #define O_NLRET(tty)    _O_FLAG((tty),ONLRET)
 140 #define O_LCUC(tty)     _O_FLAG((tty),OLCUC)
 141 
 142 #define C_SPEED(tty)    ((tty)->termios.c_cflag & CBAUD)
 143 #define C_HUP(tty)      (C_SPEED((tty)) == B0)
 144 
 145 struct tty_struct {
 146         struct termios termios;
 147         int pgrp;
 148         int session;
 149         int stopped;
 150         int flags;
 151         int count;
 152         struct winsize winsize;
 153         void (*write)(struct tty_struct * tty);
 154         struct tty_struct *link;
 155         struct tty_queue *read_q;
 156         struct tty_queue *write_q;
 157         struct tty_queue *secondary;
 158         };
 159 
 160 /*
 161  * so that interrupts won't be able to mess up the
 162  * queues, copy_to_cooked must be atomic with repect
 163  * to itself, as must tty->write. These are the flag
 164  * bit-numbers. Use the set_bit() and clear_bit()
 165  * macros to make it all atomic.
 166  */
 167 #define TTY_WRITE_BUSY 0
 168 #define TTY_READ_BUSY 1
 169 #define TTY_CR_PENDING 2
 170 
 171 /*
 172  * These have to be done with inline assembly: that way the bit-setting
 173  * is guaranteed to be atomic. Both set_bit and clear_bit return 0
 174  * if the bit-setting went ok, != 0 if the bit already was set/cleared.
 175  */
 176 extern inline int set_bit(int nr,int * addr)
     /*  */
 177 {
 178         char ok;
 179 
 180         __asm__ __volatile__("btsl %1,%2\n\tsetb %0":
 181                 "=q" (ok):"r" (nr),"m" (*(addr)));
 182         return ok;
 183 }
 184 
 185 extern inline int clear_bit(int nr, int * addr)
     /*  */
 186 {
 187         char ok;
 188 
 189         __asm__ __volatile__("btrl %1,%2\n\tsetnb %0":
 190                 "=q" (ok):"r" (nr),"m" (*(addr)));
 191         return ok;
 192 }
 193 
 194 #define TTY_WRITE_FLUSH(tty) tty_write_flush((tty))
 195 #define TTY_READ_FLUSH(tty) tty_read_flush((tty))
 196 
 197 extern void tty_write_flush(struct tty_struct *);
 198 extern void tty_read_flush(struct tty_struct *);
 199 
 200 extern struct tty_struct tty_table[];
 201 extern struct serial_struct serial_table[];
 202 extern struct tty_struct * redirect;
 203 extern int fg_console;
 204 extern unsigned long video_num_columns;
 205 extern unsigned long video_num_lines;
 206 
 207 
 208 #define TTY_TABLE(nr) \
 209 (tty_table + ((nr) ? (((nr) < 64)? (nr)-1:(nr)) : fg_console))
 210 
 211 /*      intr=^C         quit=^|         erase=del       kill=^U
 212         eof=^D          vtime=\0        vmin=\1         sxtc=\0
 213         start=^Q        stop=^S         susp=^Z         eol=\0
 214         reprint=^R      discard=^U      werase=^W       lnext=^V
 215         eol2=\0
 216 */
 217 #define INIT_C_CC "\003\034\177\025\004\0\1\0\021\023\032\0\022\017\027\026\0"
 218 
 219 extern long rs_init(long);
 220 extern long lp_init(long);
 221 extern long con_init(long);
 222 extern long tty_init(long);
 223 
 224 extern void flush_input(struct tty_struct * tty);
 225 extern void flush_output(struct tty_struct * tty);
 226 extern void wait_until_sent(struct tty_struct * tty);
 227 extern void copy_to_cooked(struct tty_struct * tty);
 228 
 229 extern int tty_ioctl(struct inode *, struct file *, unsigned int, unsigned int);
 230 extern int is_orphaned_pgrp(int pgrp);
 231 extern int is_ignored(int sig);
 232 extern int tty_signal(int sig, struct tty_struct *tty);
 233 extern int kill_pg(int pgrp, int sig, int priv);
 234 
 235 /* tty write functions */
 236 
 237 extern void rs_write(struct tty_struct * tty);
 238 extern void con_write(struct tty_struct * tty);
 239 extern void mpty_write(struct tty_struct * tty);
 240 extern void spty_write(struct tty_struct * tty);
 241 
 242 /* serial.c */
 243 
 244 extern int  serial_open(unsigned int line, struct file * filp);
 245 extern void serial_close(unsigned int line, struct file * filp);
 246 extern void change_speed(unsigned int line);
 247 extern void send_break(unsigned int line);
 248 extern int get_serial_info(unsigned int, struct serial_struct *);
 249 extern int set_serial_info(unsigned int, struct serial_struct *);
 250 
 251 /* pty.c */
 252 
 253 extern int  pty_open(unsigned int dev, struct file * filp);
 254 extern void pty_close(unsigned int dev, struct file * filp);
 255 
 256 /* console.c */
 257 
 258 void update_screen(int new_console);
 259 void blank_screen(void);
 260 void unblank_screen(void);
 261 
 262 #endif
/* */
root/include/linux/tty.h

INCLUDED FROM

DEFINITIONS
