154 lines
6.5 KiB
C
154 lines
6.5 KiB
C
/* tty.h - Terminals */
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#include <timers.h>
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#define TTY_IN_BYTES 256 /* tty input queue size */
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#define TAB_SIZE 8 /* distance between tab stops */
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#define TAB_MASK 7 /* mask to compute a tab stop position */
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#define ESC '\33' /* escape */
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#define O_NOCTTY 00400 /* from <fcntl.h>, or cc will choke */
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#define O_NONBLOCK 04000
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struct tty;
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typedef _PROTOTYPE( void (*devfun_t), (struct tty *tp) );
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typedef _PROTOTYPE( void (*devfunarg_t), (struct tty *tp, int c) );
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typedef struct tty {
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int tty_events; /* set when TTY should inspect this line */
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int tty_index; /* index into TTY table */
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/* Input queue. Typed characters are stored here until read by a program. */
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u16_t *tty_inhead; /* pointer to place where next char goes */
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u16_t *tty_intail; /* pointer to next char to be given to prog */
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int tty_incount; /* # chars in the input queue */
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int tty_eotct; /* number of "line breaks" in input queue */
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devfun_t tty_devread; /* routine to read from low level buffers */
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devfun_t tty_icancel; /* cancel any device input */
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int tty_min; /* minimum requested #chars in input queue */
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timer_t tty_tmr; /* the timer for this tty */
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/* Output section. */
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devfun_t tty_devwrite; /* routine to start actual device output */
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devfunarg_t tty_echo; /* routine to echo characters input */
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devfun_t tty_ocancel; /* cancel any ongoing device output */
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devfun_t tty_break; /* let the device send a break */
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/* Terminal parameters and status. */
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int tty_position; /* current position on the screen for echoing */
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char tty_reprint; /* 1 when echoed input messed up, else 0 */
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char tty_escaped; /* 1 when LNEXT (^V) just seen, else 0 */
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char tty_inhibited; /* 1 when STOP (^S) just seen (stops output) */
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char tty_pgrp; /* slot number of controlling process */
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char tty_openct; /* count of number of opens of this tty */
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/* Information about incomplete I/O requests is stored here. */
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char tty_inrepcode; /* reply code, TASK_REPLY or REVIVE */
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char tty_incaller; /* process that made the call (usually FS) */
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char tty_inproc; /* process that wants to read from tty */
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vir_bytes tty_in_vir; /* virtual address where data is to go */
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int tty_inleft; /* how many chars are still needed */
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int tty_incum; /* # chars input so far */
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int tty_instatus; /* status of last sys_vircopy() action */
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char tty_outrepcode; /* reply code, TASK_REPLY or REVIVE */
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char tty_outcaller; /* process that made the call (usually FS) */
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char tty_outproc; /* process that wants to write to tty */
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vir_bytes tty_out_vir; /* virtual address where data comes from */
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int tty_outleft; /* # chars yet to be output */
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int tty_outcum; /* # chars output so far */
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int tty_outstatus; /* status of last sys_vircopy() action */
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char tty_iocaller; /* process that made the call (usually FS) */
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char tty_ioproc; /* process that wants to do an ioctl */
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int tty_ioreq; /* ioctl request code */
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vir_bytes tty_iovir; /* virtual address of ioctl buffer */
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/* Miscellaneous. */
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devfun_t tty_ioctl; /* set line speed, etc. at the device level */
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devfun_t tty_close; /* tell the device that the tty is closed */
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void *tty_priv; /* pointer to per device private data */
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struct termios tty_termios; /* terminal attributes */
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struct winsize tty_winsize; /* window size (#lines and #columns) */
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u16_t tty_inbuf[TTY_IN_BYTES];/* tty input buffer */
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} tty_t;
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/* Memory allocated in tty.c, so extern here. */
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extern tty_t tty_table[NR_CONS+NR_RS_LINES+NR_PTYS];
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extern int ccurrent; /* currently visible console */
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/* Values for the fields. */
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#define NOT_ESCAPED 0 /* previous character is not LNEXT (^V) */
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#define ESCAPED 1 /* previous character was LNEXT (^V) */
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#define RUNNING 0 /* no STOP (^S) has been typed to stop output */
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#define STOPPED 1 /* STOP (^S) has been typed to stop output */
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/* Fields and flags on characters in the input queue. */
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#define IN_CHAR 0x00FF /* low 8 bits are the character itself */
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#define IN_LEN 0x0F00 /* length of char if it has been echoed */
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#define IN_LSHIFT 8 /* length = (c & IN_LEN) >> IN_LSHIFT */
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#define IN_EOT 0x1000 /* char is a line break (^D, LF) */
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#define IN_EOF 0x2000 /* char is EOF (^D), do not return to user */
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#define IN_ESC 0x4000 /* escaped by LNEXT (^V), no interpretation */
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/* Times and timeouts. */
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#define force_timeout() ((void) (0))
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/* Memory allocated in tty.c, so extern here. */
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extern timer_t *tty_timers; /* queue of TTY timers */
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extern clock_t tty_next_timeout; /* next TTY timeout */
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/* Number of elements and limit of a buffer. */
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#define buflen(buf) (sizeof(buf) / sizeof((buf)[0]))
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#define bufend(buf) ((buf) + buflen(buf))
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/* Memory allocated in tty.c, so extern here. */
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extern struct kenviron kenv; /* kernel environment (a.o.: pc_at, ega) */
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/* Function prototypes for TTY driver. */
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/* tty.c */
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_PROTOTYPE( void handle_events, (struct tty *tp) );
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_PROTOTYPE( void sigchar, (struct tty *tp, int sig) );
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_PROTOTYPE( void tty_task, (void) );
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_PROTOTYPE( int in_process, (struct tty *tp, char *buf, int count) );
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_PROTOTYPE( void out_process, (struct tty *tp, char *bstart, char *bpos,
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char *bend, int *icount, int *ocount) );
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_PROTOTYPE( void tty_wakeup, (clock_t now) );
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_PROTOTYPE( void tty_reply, (int code, int replyee, int proc_nr,
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int status) );
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_PROTOTYPE( void tty_devnop, (struct tty *tp) );
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/* rs232.c */
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_PROTOTYPE( void rs_init, (struct tty *tp) );
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#if (CHIP == INTEL)
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/* console.c */
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_PROTOTYPE( void kputc, (int c) );
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_PROTOTYPE( void cons_stop, (void) );
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_PROTOTYPE( void do_new_kmess, (message *m) );
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_PROTOTYPE( void do_diagnostics, (message *m) );
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_PROTOTYPE( void scr_init, (struct tty *tp) );
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_PROTOTYPE( void toggle_scroll, (void) );
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_PROTOTYPE( int con_loadfont, (message *m) );
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_PROTOTYPE( void select_console, (int cons_line) );
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/* keyboard.c */
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_PROTOTYPE( void kb_init, (struct tty *tp) );
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_PROTOTYPE( int kbd_loadmap, (message *m) );
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_PROTOTYPE( void do_panic_dumps, (message *m) );
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_PROTOTYPE( void do_fkey_ctl, (message *m) );
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_PROTOTYPE( void do_interrupt, (message *m) );
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/* pty.c */
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_PROTOTYPE( void do_pty, (struct tty *tp, message *m_ptr) );
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_PROTOTYPE( void pty_init, (struct tty *tp) );
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/* vidcopy.s */
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_PROTOTYPE( void vid_vid_copy, (unsigned src, unsigned dst, unsigned count));
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_PROTOTYPE( void mem_vid_copy, (u16_t *src, unsigned dst, unsigned count));
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#endif /* (CHIP == INTEL) */
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