75 lines
2.0 KiB
C
75 lines
2.0 KiB
C
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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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* NOTE! Don't touch this without checking that nothing in rs_io.s or
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* con_io.s breaks. Some constants are hardwired into the system (mainly
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* offsets into 'tty_queue'
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*/
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#ifndef _TTY_H
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#define _TTY_H
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#include <termios.h>
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#define TTY_BUF_SIZE 1024
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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 task_struct * proc_list;
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char buf[TTY_BUF_SIZE];
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};
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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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#define GETCH(queue,c) \
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(void)({c=(queue).buf[(queue).tail];INC((queue).tail);})
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#define PUTCH(c,queue) \
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(void)({(queue).buf[(queue).head]=(c);INC((queue).head);})
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#define EOF_CHAR(tty) ((tty)->termios.c_cc[VEOF])
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#define INTR_CHAR(tty) ((tty)->termios.c_cc[VINTR])
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#define STOP_CHAR(tty) ((tty)->termios.c_cc[VSTOP])
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#define START_CHAR(tty) ((tty)->termios.c_cc[VSTART])
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#define ERASE_CHAR(tty) ((tty)->termios.c_cc[VERASE])
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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 stopped;
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void (*write)(struct tty_struct * tty);
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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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extern struct tty_struct tty_table[];
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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=^Y 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\031\0\022\017\027\026\0"
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void rs_init(void);
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void con_init(void);
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void tty_init(void);
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int tty_read(unsigned c, char * buf, int n);
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int tty_write(unsigned c, char * buf, int n);
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void rs_write(struct tty_struct * tty);
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void con_write(struct tty_struct * tty);
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void copy_to_cooked(struct tty_struct * tty);
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#endif
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