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minix/drivers/tty/tty.h
Ben Gras 35a108b911 panic() cleanup. 
this change
   - makes panic() variadic, doing full printf() formatting -
     no more NO_NUM, and no more separate printf() statements
     needed to print extra info (or something in hex) before panicing
   - unifies panic() - same panic() name and usage for everyone -
     vm, kernel and rest have different names/syntax currently
     in order to implement their own luxuries, but no longer
   - throws out the 1st argument, to make source less noisy.
     the panic() in syslib retrieves the server name from the kernel
     so it should be clear enough who is panicing; e.g.
         panic("sigaction failed: %d", errno);
     looks like:
         at_wini(73130): panic: sigaction failed: 0
         syslib:panic.c: stacktrace: 0x74dc 0x2025 0x100a
   - throws out report() - printf() is more convenient and powerful
   - harmonizes/fixes the use of panic() - there were a few places
     that used printf-style formatting (didn't work) and newlines
     (messes up the formatting) in panic()
   - throws out a few per-server panic() functions
   - cleans up a tie-in of tty with panic()

merging printf() and panic() statements to be done incrementally.
2010-03-05 15:05:11 +00:00

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/* tty.h - Terminals */
#include <timers.h>
#undef lock
#undef unlock
#define TTY_REVIVE 6767
/* First minor numbers for the various classes of TTY devices. */
#define CONS_MINOR 0
#define LOG_MINOR 15
#define RS232_MINOR 16
#define KBD_MINOR 127
#define KBDAUX_MINOR 126
#define VIDEO_MINOR 125
#define TTYPX_MINOR 128
#define PTYPX_MINOR 192
#define LINEWRAP 1 /* console.c - wrap lines at column 80 */
#define TTY_IN_BYTES 256 /* tty input queue size */
#define TAB_SIZE 8 /* distance between tab stops */
#define TAB_MASK 7 /* mask to compute a tab stop position */
#define ESC '\33' /* escape */
#define O_NOCTTY 00400 /* from <fcntl.h>, or cc will choke */
#define O_NONBLOCK 04000
struct tty;
typedef _PROTOTYPE( int (*devfun_t), (struct tty *tp, int try_only) );
typedef _PROTOTYPE( void (*devfunarg_t), (struct tty *tp, int c) );
typedef struct tty {
int tty_events; /* set when TTY should inspect this line */
int tty_index; /* index into TTY table */
int tty_minor; /* device minor number */
/* Input queue. Typed characters are stored here until read by a program. */
u16_t *tty_inhead; /* pointer to place where next char goes */
u16_t *tty_intail; /* pointer to next char to be given to prog */
int tty_incount; /* # chars in the input queue */
int tty_eotct; /* number of "line breaks" in input queue */
devfun_t tty_devread; /* routine to read from low level buffers */
devfun_t tty_icancel; /* cancel any device input */
int tty_min; /* minimum requested #chars in input queue */
timer_t tty_tmr; /* the timer for this tty */
/* Output section. */
devfun_t tty_devwrite; /* routine to start actual device output */
devfunarg_t tty_echo; /* routine to echo characters input */
devfun_t tty_ocancel; /* cancel any ongoing device output */
devfun_t tty_break; /* let the device send a break */
/* Terminal parameters and status. */
int tty_position; /* current position on the screen for echoing */
char tty_reprint; /* 1 when echoed input messed up, else 0 */
char tty_escaped; /* 1 when LNEXT (^V) just seen, else 0 */
char tty_inhibited; /* 1 when STOP (^S) just seen (stops output) */
int tty_pgrp; /* slot number of controlling process */
char tty_openct; /* count of number of opens of this tty */
/* Information about incomplete I/O requests is stored here. */
int tty_inrepcode; /* reply code, TASK_REPLY or REVIVE */
char tty_inrevived; /* set to 1 if revive callback is pending */
int tty_incaller; /* process that made the call (usually FS) */
int tty_inproc; /* process that wants to read from tty */
vir_bytes tty_in_vir_g; /* address or grant where data is to go */
vir_bytes tty_in_vir_offset; /* offset into grant */
int tty_in_safe; /* nonzero: safecopies (in_vir is grantid) */
int tty_inleft; /* how many chars are still needed */
int tty_incum; /* # chars input so far */
int tty_outrepcode; /* reply code, TASK_REPLY or REVIVE */
int tty_outrevived; /* set to 1 if revive callback is pending */
int tty_outcaller; /* process that made the call (usually FS) */
int tty_outproc; /* process that wants to write to tty */
vir_bytes tty_out_vir_g; /* address or grant where data comes from */
vir_bytes tty_out_vir_offset; /* offset into grant */
int tty_out_safe; /* nonzero: safecopies (out_vir is grantid) */
int tty_outleft; /* # chars yet to be output */
int tty_outcum; /* # chars output so far */
int tty_iocaller; /* process that made the call (usually FS) */
int tty_iorevived; /* set to 1 if revive callback is pending */
int tty_ioproc; /* process that wants to do an ioctl */
int tty_iostatus; /* result */
int tty_ioreq; /* ioctl request code */
int tty_io_safe; /* safe copy mode? (iovir is grant id) */
vir_bytes tty_iovir_g; /* virtual address of ioctl buffer or grant */
/* select() data */
int tty_select_ops; /* which operations are interesting */
int tty_select_proc; /* which process wants notification */
/* Miscellaneous. */
devfun_t tty_ioctl; /* set line speed, etc. at the device level */
devfun_t tty_close; /* tell the device that the tty is closed */
void *tty_priv; /* pointer to per device private data */
struct termios tty_termios; /* terminal attributes */
struct winsize tty_winsize; /* window size (#lines and #columns) */
u16_t tty_inbuf[TTY_IN_BYTES];/* tty input buffer */
} tty_t;
/* Memory allocated in tty.c, so extern here. */
extern tty_t tty_table[NR_CONS+NR_RS_LINES+NR_PTYS];
extern int ccurrent; /* currently visible console */
extern u32_t system_hz; /* system clock frequency */
extern unsigned long kbd_irq_set;
extern unsigned long rs_irq_set;
/* Values for the fields. */
#define NOT_ESCAPED 0 /* previous character is not LNEXT (^V) */
#define ESCAPED 1 /* previous character was LNEXT (^V) */
#define RUNNING 0 /* no STOP (^S) has been typed to stop output */
#define STOPPED 1 /* STOP (^S) has been typed to stop output */
/* Fields and flags on characters in the input queue. */
#define IN_CHAR 0x00FF /* low 8 bits are the character itself */
#define IN_LEN 0x0F00 /* length of char if it has been echoed */
#define IN_LSHIFT 8 /* length = (c & IN_LEN) >> IN_LSHIFT */
#define IN_EOT 0x1000 /* char is a line break (^D, LF) */
#define IN_EOF 0x2000 /* char is EOF (^D), do not return to user */
#define IN_ESC 0x4000 /* escaped by LNEXT (^V), no interpretation */
/* Times and timeouts. */
#define force_timeout() ((void) (0))
/* Memory allocated in tty.c, so extern here. */
extern timer_t *tty_timers; /* queue of TTY timers */
extern clock_t tty_next_timeout; /* next TTY timeout */
/* Number of elements and limit of a buffer. */
#define buflen(buf) (sizeof(buf) / sizeof((buf)[0]))
#define bufend(buf) ((buf) + buflen(buf))
/* Memory allocated in tty.c, so extern here. */
extern struct machine machine; /* machine information (a.o.: pc_at, ega) */
/* The tty outputs diagnostic messages in a circular buffer. */
extern struct kmessages kmess;
/* Function prototypes for TTY driver. */
/* tty.c */
_PROTOTYPE( void handle_events, (struct tty *tp) );
_PROTOTYPE( void sigchar, (struct tty *tp, int sig, int mayflush) );
_PROTOTYPE( void tty_task, (void) );
_PROTOTYPE( int in_process, (struct tty *tp, char *buf, int count) );
_PROTOTYPE( void out_process, (struct tty *tp, char *bstart, char *bpos,
char *bend, int *icount, int *ocount) );
_PROTOTYPE( void tty_wakeup, (clock_t now) );
#define tty_reply(c, r, p, s) tty_reply_f(__FILE__, __LINE__, (c), (r), (p), (s))
_PROTOTYPE( void tty_reply_f, (char *f, int l, int code, int replyee, int proc_nr,
int status) );
_PROTOTYPE( int select_try, (struct tty *tp, int ops) );
_PROTOTYPE( int select_retry, (struct tty *tp) );
/* rs232.c */
_PROTOTYPE( void rs_init, (struct tty *tp) );
_PROTOTYPE( void rs_interrupt, (message *m) );
#if (CHIP == INTEL)
/* console.c */
_PROTOTYPE( void kputc, (int c) );
_PROTOTYPE( void cons_stop, (void) );
_PROTOTYPE( void do_new_kmess, (message *m) );
_PROTOTYPE( void do_diagnostics, (message *m, int safe) );
_PROTOTYPE( void do_get_kmess, (message *m) );
_PROTOTYPE( void do_get_kmess_s, (message *m) );
_PROTOTYPE( void scr_init, (struct tty *tp) );
_PROTOTYPE( void toggle_scroll, (void) );
_PROTOTYPE( int con_loadfont, (message *m) );
_PROTOTYPE( void select_console, (int cons_line) );
_PROTOTYPE( void beep_x, ( unsigned freq, clock_t dur) );
_PROTOTYPE( void do_video, (message *m) );
/* keyboard.c */
_PROTOTYPE( void kb_init, (struct tty *tp) );
_PROTOTYPE( void kb_init_once, (void) );
_PROTOTYPE( int kbd_loadmap, (message *m, int safe) );
_PROTOTYPE( void do_fkey_ctl, (message *m) );
_PROTOTYPE( void kbd_interrupt, (message *m) );
_PROTOTYPE( void do_kbd, (message *m) );
_PROTOTYPE( void do_kbdaux, (message *m) );
_PROTOTYPE( int kbd_status, (message *m_ptr) );
/* pty.c */
_PROTOTYPE( void do_pty, (struct tty *tp, message *m_ptr) );
_PROTOTYPE( void pty_init, (struct tty *tp) );
_PROTOTYPE( void select_retry_pty, (struct tty *tp) );
_PROTOTYPE( int pty_status, (message *m_ptr) );
#endif /* (CHIP == INTEL) */
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