1 | /* tty.h - Terminals */
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2 |
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3 | #include <timers.h>
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4 |
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5 | /* First minor numbers for the various classes of TTY devices. */
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6 | #define CONS_MINOR 0
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7 | #define LOG_MINOR 15
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8 | #define RS232_MINOR 16
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9 | #define TTYPX_MINOR 128
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10 | #define PTYPX_MINOR 192
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11 |
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12 | #define LINEWRAP 1 /* console.c - wrap lines at column 80 */
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13 |
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14 | #define TTY_IN_BYTES 256 /* tty input queue size */
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15 | #define TAB_SIZE 8 /* distance between tab stops */
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16 | #define TAB_MASK 7 /* mask to compute a tab stop position */
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17 |
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18 | #define ESC '\33' /* escape */
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19 |
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20 | #define O_NOCTTY 00400 /* from <fcntl.h>, or cc will choke */
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21 | #define O_NONBLOCK 04000
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22 |
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23 | struct tty;
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24 | typedef _PROTOTYPE( int (*devfun_t), (struct tty *tp, int try_only) );
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25 | typedef _PROTOTYPE( void (*devfunarg_t), (struct tty *tp, int c) );
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26 |
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27 | typedef struct tty {
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28 | int tty_events; /* set when TTY should inspect this line */
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29 | int tty_index; /* index into TTY table */
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30 | int tty_minor; /* device minor number */
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31 |
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32 | /* Input queue. Typed characters are stored here until read by a program. */
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33 | u16_t *tty_inhead; /* pointer to place where next char goes */
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34 | u16_t *tty_intail; /* pointer to next char to be given to prog */
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35 | int tty_incount; /* # chars in the input queue */
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36 | int tty_eotct; /* number of "line breaks" in input queue */
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37 | devfun_t tty_devread; /* routine to read from low level buffers */
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38 | devfun_t tty_icancel; /* cancel any device input */
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39 | int tty_min; /* minimum requested #chars in input queue */
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40 | timer_t tty_tmr; /* the timer for this tty */
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41 |
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42 | /* Output section. */
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43 | devfun_t tty_devwrite; /* routine to start actual device output */
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44 | devfunarg_t tty_echo; /* routine to echo characters input */
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45 | devfun_t tty_ocancel; /* cancel any ongoing device output */
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46 | devfun_t tty_break; /* let the device send a break */
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47 |
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48 | /* Terminal parameters and status. */
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49 | int tty_position; /* current position on the screen for echoing */
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50 | char tty_reprint; /* 1 when echoed input messed up, else 0 */
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51 | char tty_escaped; /* 1 when LNEXT (^V) just seen, else 0 */
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52 | char tty_inhibited; /* 1 when STOP (^S) just seen (stops output) */
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53 | char tty_pgrp; /* slot number of controlling process */
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54 | char tty_openct; /* count of number of opens of this tty */
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55 |
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56 | /* Information about incomplete I/O requests is stored here. */
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57 | char tty_inrepcode; /* reply code, TASK_REPLY or REVIVE */
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58 | char tty_inrevived; /* set to 1 if revive callback is pending */
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59 | char tty_incaller; /* process that made the call (usually FS) */
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60 | char tty_inproc; /* process that wants to read from tty */
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61 | vir_bytes tty_in_vir; /* virtual address where data is to go */
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62 | int tty_inleft; /* how many chars are still needed */
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63 | int tty_incum; /* # chars input so far */
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64 | char tty_outrepcode; /* reply code, TASK_REPLY or REVIVE */
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65 | char tty_outrevived; /* set to 1 if revive callback is pending */
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66 | char tty_outcaller; /* process that made the call (usually FS) */
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67 | char tty_outproc; /* process that wants to write to tty */
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68 | vir_bytes tty_out_vir; /* virtual address where data comes from */
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69 | int tty_outleft; /* # chars yet to be output */
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70 | int tty_outcum; /* # chars output so far */
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71 | char tty_iocaller; /* process that made the call (usually FS) */
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72 | char tty_ioproc; /* process that wants to do an ioctl */
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73 | int tty_ioreq; /* ioctl request code */
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74 | vir_bytes tty_iovir; /* virtual address of ioctl buffer */
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75 |
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76 | /* select() data */
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77 | int tty_select_ops; /* which operations are interesting */
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78 | int tty_select_proc; /* which process wants notification */
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79 |
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80 | /* Miscellaneous. */
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81 | devfun_t tty_ioctl; /* set line speed, etc. at the device level */
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82 | devfun_t tty_close; /* tell the device that the tty is closed */
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83 | void *tty_priv; /* pointer to per device private data */
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84 | struct termios tty_termios; /* terminal attributes */
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85 | struct winsize tty_winsize; /* window size (#lines and #columns) */
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86 |
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87 | u16_t tty_inbuf[TTY_IN_BYTES];/* tty input buffer */
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88 |
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89 | } tty_t;
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90 |
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91 | /* Memory allocated in tty.c, so extern here. */
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92 | extern tty_t tty_table[NR_CONS+NR_RS_LINES+NR_PTYS];
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93 | extern int ccurrent; /* currently visible console */
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94 | extern int irq_hook_id; /* hook id for keyboard irq */
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95 |
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96 | extern unsigned long kbd_irq_set;
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97 | extern unsigned long rs_irq_set;
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98 |
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99 | /* Values for the fields. */
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100 | #define NOT_ESCAPED 0 /* previous character is not LNEXT (^V) */
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101 | #define ESCAPED 1 /* previous character was LNEXT (^V) */
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102 | #define RUNNING 0 /* no STOP (^S) has been typed to stop output */
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103 | #define STOPPED 1 /* STOP (^S) has been typed to stop output */
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104 |
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105 | /* Fields and flags on characters in the input queue. */
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106 | #define IN_CHAR 0x00FF /* low 8 bits are the character itself */
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107 | #define IN_LEN 0x0F00 /* length of char if it has been echoed */
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108 | #define IN_LSHIFT 8 /* length = (c & IN_LEN) >> IN_LSHIFT */
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109 | #define IN_EOT 0x1000 /* char is a line break (^D, LF) */
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110 | #define IN_EOF 0x2000 /* char is EOF (^D), do not return to user */
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111 | #define IN_ESC 0x4000 /* escaped by LNEXT (^V), no interpretation */
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112 |
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113 | /* Times and timeouts. */
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114 | #define force_timeout() ((void) (0))
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115 |
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116 | /* Memory allocated in tty.c, so extern here. */
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117 | extern timer_t *tty_timers; /* queue of TTY timers */
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118 | extern clock_t tty_next_timeout; /* next TTY timeout */
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119 |
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120 | /* Number of elements and limit of a buffer. */
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121 | #define buflen(buf) (sizeof(buf) / sizeof((buf)[0]))
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122 | #define bufend(buf) ((buf) + buflen(buf))
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123 |
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124 | /* Memory allocated in tty.c, so extern here. */
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125 | extern struct machine machine; /* machine information (a.o.: pc_at, ega) */
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126 |
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127 | /* Function prototypes for TTY driver. */
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128 | /* tty.c */
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129 | _PROTOTYPE( void handle_events, (struct tty *tp) );
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130 | _PROTOTYPE( void sigchar, (struct tty *tp, int sig) );
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131 | _PROTOTYPE( void tty_task, (void) );
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132 | _PROTOTYPE( int in_process, (struct tty *tp, char *buf, int count) );
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133 | _PROTOTYPE( void out_process, (struct tty *tp, char *bstart, char *bpos,
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134 | char *bend, int *icount, int *ocount) );
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135 | _PROTOTYPE( void tty_wakeup, (clock_t now) );
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136 | _PROTOTYPE( void tty_reply, (int code, int replyee, int proc_nr,
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137 | int status) );
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138 | _PROTOTYPE( int tty_devnop, (struct tty *tp, int try) );
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139 | _PROTOTYPE( int select_try, (struct tty *tp, int ops) );
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140 | _PROTOTYPE( int select_retry, (struct tty *tp) );
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141 |
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142 | /* console.c */
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143 | _PROTOTYPE( void kputc, (int c) );
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144 | _PROTOTYPE( void cons_stop, (void) );
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145 | _PROTOTYPE( void do_new_kmess, (message *m) );
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146 | _PROTOTYPE( void do_diagnostics, (message *m) );
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147 | _PROTOTYPE( void scr_init, (struct tty *tp) );
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148 | _PROTOTYPE( void toggle_scroll, (void) );
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149 | _PROTOTYPE( int con_loadfont, (message *m) );
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150 | _PROTOTYPE( void select_console, (int cons_line) );
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151 |
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152 | /* keyboard.c */
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153 | _PROTOTYPE( void kb_init, (struct tty *tp) );
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154 | _PROTOTYPE( void kb_init_once, (void) );
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155 | _PROTOTYPE( int kbd_loadmap, (message *m) );
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156 | _PROTOTYPE( void do_panic_dumps, (message *m) );
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157 | _PROTOTYPE( void do_fkey_ctl, (message *m) );
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158 | _PROTOTYPE( void kbd_interrupt, (message *m) );
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159 |
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160 | /* vidcopy.s */
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161 | _PROTOTYPE( void vid_vid_copy, (unsigned src, unsigned dst, unsigned count));
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162 | _PROTOTYPE( void mem_vid_copy, (u16_t *src, unsigned dst, unsigned count));
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