kernel/chr_drv/console.c

/* */
This source file includes following definitions.
gotoxy
set_origin
scrup
scrdown
lf
ri
cr
del
csi_J
csi_K
csi_m
set_cursor
hide_cursor
respond
insert_char
insert_line
delete_char
delete_line
csi_at
csi_L
csi_P
csi_M
save_cur
restore_cur
con_write
do_keyboard_interrupt
memsetw
con_init
kbdsave
get_scrmem
set_scrmem
blank_screen
unblank_screen
update_screen
sysbeepstop
sysbeep
do_screendump
console_print
   1 /*
   2  *  linux/kernel/console.c
   3  *
   4  *  (C) 1991  Linus Torvalds
   5  */
   6 
   7 /*
   8  *      console.c
   9  *
  10  * This module implements the console io functions
  11  *      'void con_init(void)'
  12  *      'void con_write(struct tty_queue * queue)'
  13  * Hopefully this will be a rather complete VT102 implementation.
  14  *
  15  * Beeping thanks to John T Kohl.
  16  * 
  17  * Virtual Consoles, Screen Blanking, Screen Dumping, Color, Graphics
  18  *   Chars, and VT100 enhancements by Peter MacDonald.
  19  */
  20 
  21 /*
  22  *  NOTE!!! We sometimes disable and enable interrupts for a short while
  23  * (to put a word in video IO), but this will work even for keyboard
  24  * interrupts. We know interrupts aren't enabled when getting a keyboard
  25  * interrupt, as we use trap-gates. Hopefully all is well.
  26  */
  27 
  28 /*
  29  * Code to check for different video-cards mostly by Galen Hunt,
  30  * <g-hunt@ee.utah.edu>
  31  */
  32 
  33 #include <linux/sched.h>
  34 #include <linux/timer.h>
  35 #include <linux/tty.h>
  36 #include <linux/config.h>
  37 #include <linux/kernel.h>
  38 
  39 #include <asm/io.h>
  40 #include <asm/system.h>
  41 #include <asm/segment.h>
  42 
  43 #include <linux/string.h>
  44 #include <errno.h>
  45 
  46 #include <sys/kd.h>
  47 #include "vt_kern.h"
  48 
  49 #define DEF_TERMIOS \
  50 (struct termios) { \
  51         ICRNL, \
  52         OPOST | ONLCR, \
  53         0, \
  54         IXON | ISIG | ICANON | ECHO | ECHOCTL | ECHOKE, \
  55         0, \
  56         INIT_C_CC \
  57 }
  58 
  59 static void blank_screen(void);
  60 static void unblank_screen(void);
  61 
  62 /*
  63  * These are set up by the setup-routine at boot-time:
  64  */
  65 
  66 #define ORIG_X                  (*(unsigned char *)0x90000)
  67 #define ORIG_Y                  (*(unsigned char *)0x90001)
  68 #define ORIG_VIDEO_PAGE         (*(unsigned short *)0x90004)
  69 #define ORIG_VIDEO_MODE         ((*(unsigned short *)0x90006) & 0xff)
  70 #define ORIG_VIDEO_COLS         (((*(unsigned short *)0x90006) & 0xff00) >> 8)
  71 #define ORIG_VIDEO_LINES        ((*(unsigned short *)0x9000e) & 0xff)
  72 #define ORIG_VIDEO_EGA_AX       (*(unsigned short *)0x90008)
  73 #define ORIG_VIDEO_EGA_BX       (*(unsigned short *)0x9000a)
  74 #define ORIG_VIDEO_EGA_CX       (*(unsigned short *)0x9000c)
  75 
  76 #define VIDEO_TYPE_MDA          0x10    /* Monochrome Text Display      */
  77 #define VIDEO_TYPE_CGA          0x11    /* CGA Display                  */
  78 #define VIDEO_TYPE_EGAM         0x20    /* EGA/VGA in Monochrome Mode   */
  79 #define VIDEO_TYPE_EGAC         0x21    /* EGA/VGA in Color Mode        */
  80 
  81 #define NPAR 16
  82 
  83 int NR_CONSOLES = 0;
  84 
  85 extern void vt_init(void);
  86 extern void keyboard_interrupt(void);
  87 extern void set_leds(void);
  88 extern unsigned char kapplic;
  89 extern unsigned char kleds;
  90 extern unsigned char kmode;
  91 extern unsigned char kraw;
  92 extern unsigned char ke0;
  93 
  94 unsigned long   video_num_columns;              /* Number of text columns       */
  95 unsigned long   video_num_lines;                /* Number of test lines         */
  96 
  97 static unsigned char    video_type;             /* Type of display being used   */
  98 static unsigned long    video_mem_base;         /* Base of video memory         */
  99 static unsigned long    video_mem_term;         /* End of video memory          */
 100 static unsigned long    video_size_row;         /* Bytes per row                */
 101 static unsigned char    video_page;             /* Initial video page           */
 102 static unsigned short   video_port_reg;         /* Video register select port   */
 103 static unsigned short   video_port_val;         /* Video register value port    */
 104 static int can_do_colour = 0;
 105 
 106 static struct {
 107         unsigned short  vc_video_erase_char;    
 108         unsigned char   vc_attr;
 109         unsigned char   vc_def_attr;
 110         int             vc_bold_attr;
 111         unsigned long   vc_ques;
 112         unsigned long   vc_state;
 113         char *          vc_restate;
 114         unsigned long   vc_checkin;
 115         unsigned long   vc_origin;              /* Used for EGA/VGA fast scroll */
 116         unsigned long   vc_scr_end;             /* Used for EGA/VGA fast scroll */
 117         unsigned long   vc_pos;
 118         unsigned long   vc_x,vc_y;
 119         unsigned long   vc_top,vc_bottom;
 120         unsigned long   vc_npar,vc_par[NPAR];
 121         unsigned long   vc_video_mem_start;     /* Start of video RAM           */
 122         unsigned long   vc_video_mem_end;       /* End of video RAM (sort of)   */
 123         unsigned int    vc_saved_x;
 124         unsigned int    vc_saved_y;
 125         unsigned int    vc_iscolor;
 126         unsigned char   vc_kbdapplic;
 127         unsigned char   vc_kbdleds;
 128         unsigned char   vc_kbdmode;
 129         unsigned char   vc_kbdraw;
 130         unsigned char   vc_kbde0;
 131         char *          vc_translate;
 132 } vc_cons [MAX_CONSOLES];
 133 
 134 #define MEM_BUFFER_SIZE (2*80*50*8) 
 135 
 136 unsigned short *vc_scrbuf[MAX_CONSOLES];
 137 unsigned short vc_scrmembuf[MEM_BUFFER_SIZE/2];
 138 static int console_blanked = 0;
 139 
 140 #define origin          (vc_cons[currcons].vc_origin)
 141 #define scr_end         (vc_cons[currcons].vc_scr_end)
 142 #define pos             (vc_cons[currcons].vc_pos)
 143 #define top             (vc_cons[currcons].vc_top)
 144 #define bottom          (vc_cons[currcons].vc_bottom)
 145 #define x               (vc_cons[currcons].vc_x)
 146 #define y               (vc_cons[currcons].vc_y)
 147 #define state           (vc_cons[currcons].vc_state)
 148 #define restate         (vc_cons[currcons].vc_restate)
 149 #define checkin         (vc_cons[currcons].vc_checkin)
 150 #define npar            (vc_cons[currcons].vc_npar)
 151 #define par             (vc_cons[currcons].vc_par)
 152 #define ques            (vc_cons[currcons].vc_ques)
 153 #define attr            (vc_cons[currcons].vc_attr)
 154 #define saved_x         (vc_cons[currcons].vc_saved_x)
 155 #define saved_y         (vc_cons[currcons].vc_saved_y)
 156 #define translate       (vc_cons[currcons].vc_translate)
 157 #define video_mem_start (vc_cons[currcons].vc_video_mem_start)
 158 #define video_mem_end   (vc_cons[currcons].vc_video_mem_end)
 159 #define def_attr        (vc_cons[currcons].vc_def_attr)
 160 #define video_erase_char  (vc_cons[currcons].vc_video_erase_char)       
 161 #define iscolor         (vc_cons[currcons].vc_iscolor)
 162 #define kbdapplic       (vc_cons[currcons].vc_kbdapplic)
 163 #define kbdmode         (vc_cons[currcons].vc_kbdmode)
 164 #define kbdraw          (vc_cons[currcons].vc_kbdraw)
 165 #define kbde0           (vc_cons[currcons].vc_kbde0)
 166 #define kbdleds         (vc_cons[currcons].vc_kbdleds)
 167 
 168 int blankinterval = 5*60*HZ;
 169 static int screen_size = 0;
 170 
 171 static void sysbeep(void);
 172 
 173 /*
 174  * this is what the terminal answers to a ESC-Z or csi0c
 175  * query (= vt100 response).
 176  */
 177 #define RESPONSE "\033[?1;2c"
 178 
 179 static char * translations[] = {
 180 /* 8-bit Latin-1 mapped to the PC charater set: '\0' means non-printable */
 181         "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"
 182         "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"
 183         " !\"#$%&'()*+,-./0123456789:;<=>?"
 184         "@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_"
 185         "`abcdefghijklmnopqrstuvwxyz{|}~\0"
 186         "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"
 187         "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"
 188         "\040\255\233\234\376\235\174\025\376\376\246\256\252\055\376\376"
 189         "\370\361\375\376\376\346\024\371\376\376\247\257\254\253\376\250"
 190         "\376\376\376\376\216\217\222\200\376\220\376\376\376\376\376\376"
 191         "\376\245\376\376\376\376\231\376\376\376\376\376\232\376\376\341"
 192         "\205\240\203\376\204\206\221\207\212\202\210\211\215\241\214\213"
 193         "\376\244\225\242\223\376\224\366\376\227\243\226\201\376\376\230",
 194 /* vt100 graphics */
 195         "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"
 196         "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"
 197         " !\"#$%&'()*+,-./0123456789:;<=>?"
 198         "@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^ "
 199         "\004\261\007\007\007\007\370\361\007\007\275\267\326\323\327\304"
 200         "\304\304\304\304\307\266\320\322\272\363\362\343\007\234\007\0"
 201         "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"
 202         "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"
 203         "\040\255\233\234\376\235\174\025\376\376\246\256\252\055\376\376"
 204         "\370\361\375\376\376\346\024\371\376\376\247\257\254\253\376\250"
 205         "\376\376\376\376\216\217\222\200\376\220\376\376\376\376\376\376"
 206         "\376\245\376\376\376\376\231\376\376\376\376\376\232\376\376\341"
 207         "\205\240\203\376\204\206\221\207\212\202\210\211\215\241\214\213"
 208         "\376\244\225\242\223\376\224\366\376\227\243\226\201\376\376\230"
 209 };
 210 
 211 #define NORM_TRANS (translations[0])
 212 #define GRAF_TRANS (translations[1])
 213 
 214 /* NOTE! gotoxy thinks x==video_num_columns is ok */
 215 static inline void gotoxy(int currcons, unsigned int new_x,unsigned int new_y)
     /*  */
 216 {
 217         if (new_x > video_num_columns || new_y >= video_num_lines)
 218                 return;
 219         x = new_x;
 220         y = new_y;
 221         pos = origin + y*video_size_row + (x<<1);
 222 }
 223 
 224 static inline void set_origin(int currcons)
     /*  */
 225 {
 226         if (video_type != VIDEO_TYPE_EGAC && video_type != VIDEO_TYPE_EGAM)
 227                 return;
 228         if (currcons != fg_console)
 229                 return;
 230         cli();
 231         outb_p(12, video_port_reg);
 232         outb_p(0xff&((origin-video_mem_base)>>9), video_port_val);
 233         outb_p(13, video_port_reg);
 234         outb_p(0xff&((origin-video_mem_base)>>1), video_port_val);
 235         sti();
 236 }
 237 
 238 static void scrup(int currcons, unsigned int t, unsigned int b)
     /*  */
 239 {
 240         int hardscroll = 1;
 241 
 242         if (b > video_num_lines || t >= b)
 243                 return;
 244         if (video_type != VIDEO_TYPE_EGAC && video_type != VIDEO_TYPE_EGAM)
 245                 hardscroll = 0;
 246         else if (t || b != video_num_lines)
 247                 hardscroll = 0;
 248         if (hardscroll) {
 249                 origin += video_size_row;
 250                 pos += video_size_row;
 251                 scr_end += video_size_row;
 252                 if (scr_end > video_mem_end) {
 253                         __asm__("cld\n\t"
 254                                 "rep\n\t"
 255                                 "movsl\n\t"
 256                                 "movl _video_num_columns,%1\n\t"
 257                                 "rep\n\t"
 258                                 "stosw"
 259                                 ::"a" (video_erase_char),
 260                                 "c" ((video_num_lines-1)*video_num_columns>>1),
 261                                 "D" (video_mem_start),
 262                                 "S" (origin)
 263                                 :"cx","di","si");
 264                         scr_end -= origin-video_mem_start;
 265                         pos -= origin-video_mem_start;
 266                         origin = video_mem_start;
 267                 } else {
 268                         __asm__("cld\n\t"
 269                                 "rep\n\t"
 270                                 "stosw"
 271                                 ::"a" (video_erase_char),
 272                                 "c" (video_num_columns),
 273                                 "D" (scr_end-video_size_row)
 274                                 :"cx","di");
 275                 }
 276                 set_origin(currcons);
 277         } else {
 278                 __asm__("cld\n\t"
 279                         "rep\n\t"
 280                         "movsl\n\t"
 281                         "movl _video_num_columns,%%ecx\n\t"
 282                         "rep\n\t"
 283                         "stosw"
 284                         ::"a" (video_erase_char),
 285                         "c" ((b-t-1)*video_num_columns>>1),
 286                         "D" (origin+video_size_row*t),
 287                         "S" (origin+video_size_row*(t+1))
 288                         :"cx","di","si");
 289         }
 290 }
 291 
 292 static void scrdown(int currcons, unsigned int t, unsigned int b)
     /*  */
 293 {
 294         if (b > video_num_lines || t >= b)
 295                 return;
 296         __asm__("std\n\t"
 297                 "rep\n\t"
 298                 "movsl\n\t"
 299                 "addl $2,%%edi\n\t"     /* %edi has been decremented by 4 */
 300                 "movl _video_num_columns,%%ecx\n\t"
 301                 "rep\n\t"
 302                 "stosw\n\t"
 303                 "cld"
 304                 ::"a" (video_erase_char),
 305                 "c" ((b-t-1)*video_num_columns>>1),
 306                 "D" (origin+video_size_row*b-4),
 307                 "S" (origin+video_size_row*(b-1)-4)
 308                 :"ax","cx","di","si");
 309 }
 310 
 311 static void lf(int currcons)
     /*  */
 312 {
 313         if (y+1<bottom) {
 314                 y++;
 315                 pos += video_size_row;
 316                 return;
 317         } else 
 318                 scrup(currcons,top,bottom);
 319 }
 320 
 321 static void ri(int currcons)
     /*  */
 322 {
 323         if (y>top) {
 324                 y--;
 325                 pos -= video_size_row;
 326                 return;
 327         } else
 328                 scrdown(currcons,top,bottom);
 329 }
 330 
 331 static void cr(int currcons)
     /*  */
 332 {
 333         pos -= x<<1;
 334         x=0;
 335 }
 336 
 337 static void del(int currcons)
     /*  */
 338 {
 339         if (x) {
 340                 pos -= 2;
 341                 x--;
 342                 *(unsigned short *)pos = video_erase_char;
 343         }
 344 }
 345 
 346 static void csi_J(int currcons, int vpar)
     /*  */
 347 {
 348         unsigned long count;
 349         unsigned long start;
 350 
 351         switch (vpar) {
 352                 case 0: /* erase from cursor to end of display */
 353                         count = (scr_end-pos)>>1;
 354                         start = pos;
 355                         break;
 356                 case 1: /* erase from start to cursor */
 357                         count = (pos-origin)>>1;
 358                         start = origin;
 359                         break;
 360                 case 2: /* erase whole display */
 361                         count = video_num_columns * video_num_lines;
 362                         start = origin;
 363                         break;
 364                 default:
 365                         return;
 366         }
 367         __asm__("cld\n\t"
 368                 "rep\n\t"
 369                 "stosw\n\t"
 370                 ::"c" (count),
 371                 "D" (start),"a" (video_erase_char)
 372                 :"cx","di");
 373 }
 374 
 375 static void csi_K(int currcons, int vpar)
     /*  */
 376 {
 377         long count;
 378         long start;
 379 
 380         switch (vpar) {
 381                 case 0: /* erase from cursor to end of line */
 382                         if (x>=video_num_columns)
 383                                 return;
 384                         count = video_num_columns-x;
 385                         start = pos;
 386                         break;
 387                 case 1: /* erase from start of line to cursor */
 388                         start = pos - (x<<1);
 389                         count = (x<video_num_columns)?x:video_num_columns;
 390                         break;
 391                 case 2: /* erase whole line */
 392                         start = pos - (x<<1);
 393                         count = video_num_columns;
 394                         break;
 395                 default:
 396                         return;
 397         }
 398         __asm__("cld\n\t"
 399                 "rep\n\t"
 400                 "stosw\n\t"
 401                 ::"c" (count),
 402                 "D" (start),"a" (video_erase_char)
 403                 :"cx","di");
 404 }
 405 
 406 static void csi_m(int currcons )
     /*  */
 407 {
 408         int i;
 409         static int conv_table[8] = { 0, 4, 2, 6, 1, 5, 3, 7 };
 410 
 411         for (i=0;i<=npar;i++)
 412                 switch (par[i]) {
 413                         case 0: attr=def_attr;break;  /* default */
 414                         case 1: attr=(iscolor?attr|0x08:attr|0x0f);break;  /* bold */
 415                         /*case 4: attr=attr|0x01;break;*/  /* underline */
 416                         case 4: /* bold */ 
 417                           if (!iscolor)
 418                             attr |= 0x01;
 419                           else
 420                           { /* check if forground == background */
 421                             if (vc_cons[currcons].vc_bold_attr != -1)
 422                                 attr = (vc_cons[currcons].vc_bold_attr&0x0f)|(0xf0&(attr));
 423                             else
 424                             { short newattr = (attr&0xf0)|(0xf&(~attr));
 425                                 attr = ((newattr&0xf)==((attr>>4)&0xf)? 
 426                                 (attr&0xf0)|(((attr&0xf)+1)%0xf):
 427                                 newattr);
 428                             }    
 429                           }
 430                           break;
 431                         case 5: attr=attr|0x80;break;  /* blinking */
 432                         case 7: attr=(attr&0x88)|((attr<<4)&0x70)|
 433                           ((attr>>4)&0x07);break;  /* negative */
 434                         case 22: attr=attr&0xf7;break; /* not bold */ 
 435                         case 24: attr=attr&0xfe;break;  /* not underline */
 436                         case 25: attr=attr&0x7f;break;  /* not blinking */
 437                         case 27: attr=def_attr;break; /* positive image */
 438                         case 39: attr=(attr & 0xf8)|(def_attr & 0x07); break;
 439                         case 49: attr=(attr & 0x8f)|(def_attr & 0x70); break;
 440                         default:
 441                           if (!can_do_colour)
 442                             break;
 443                           iscolor = 1;
 444                           if ((par[i]>=30) && (par[i]<=37))
 445                             attr = (attr & 0xf8) | conv_table[par[i]-30];
 446                           else  /* Background color */
 447                             if ((par[i]>=40) && (par[i]<=47))
 448                               attr = (attr & 0x8f) | (conv_table[par[i]-40]<<4);
 449                             else
 450                                 break;
 451                 }
 452 }
 453 
 454 static inline void set_cursor(int currcons)
     /*  */
 455 {
 456         if (currcons != fg_console)
 457                 return;
 458         cli();
 459         outb_p(14, video_port_reg);
 460         outb_p(0xff&((pos-video_mem_base)>>9), video_port_val);
 461         outb_p(15, video_port_reg);
 462         outb_p(0xff&((pos-video_mem_base)>>1), video_port_val);
 463         sti();
 464 }
 465 
 466 static inline void hide_cursor(int currcons)
     /*  */
 467 {
 468         outb_p(14, video_port_reg);
 469         outb_p(0xff&((scr_end-video_mem_base)>>9), video_port_val);
 470         outb_p(15, video_port_reg);
 471         outb_p(0xff&((scr_end-video_mem_base)>>1), video_port_val);
 472 }
 473 
 474 static void respond(int currcons, struct tty_struct * tty)
     /*  */
 475 {
 476         char * p = RESPONSE;
 477 
 478         cli();
 479         while (*p) {
 480                 PUTCH(*p,tty->read_q);
 481                 p++;
 482         }
 483         sti();
 484         TTY_READ_FLUSH(tty);
 485 }
 486 
 487 static void insert_char(int currcons)
     /*  */
 488 {
 489         unsigned int i = x;
 490         unsigned short tmp, old = video_erase_char;
 491         unsigned short * p = (unsigned short *) pos;
 492 
 493         while (i++ < video_num_columns) {
 494                 tmp = *p;
 495                 *p = old;
 496                 old = tmp;
 497                 p++;
 498         }
 499 }
 500 
 501 static void insert_line(int currcons)
     /*  */
 502 {
 503         scrdown(currcons,y,bottom);
 504 }
 505 
 506 static void delete_char(int currcons)
     /*  */
 507 {
 508         unsigned int i = x;
 509         unsigned short * p = (unsigned short *) pos;
 510 
 511         if (x >= video_num_columns)
 512                 return;
 513         while (++i < video_num_columns) {
 514                 *p = *(p+1);
 515                 p++;
 516         }
 517         *p = video_erase_char;
 518 }
 519 
 520 static void delete_line(int currcons)
     /*  */
 521 {
 522         scrup(currcons,y,bottom);
 523 }
 524 
 525 static void csi_at(int currcons, unsigned int nr)
     /*  */
 526 {
 527         if (nr > video_num_columns)
 528                 nr = video_num_columns;
 529         else if (!nr)
 530                 nr = 1;
 531         while (nr--)
 532                 insert_char(currcons);
 533 }
 534 
 535 static void csi_L(int currcons, unsigned int nr)
     /*  */
 536 {
 537         if (nr > video_num_lines)
 538                 nr = video_num_lines;
 539         else if (!nr)
 540                 nr = 1;
 541         while (nr--)
 542                 insert_line(currcons);
 543 }
 544 
 545 static void csi_P(int currcons, unsigned int nr)
     /*  */
 546 {
 547         if (nr > video_num_columns)
 548                 nr = video_num_columns;
 549         else if (!nr)
 550                 nr = 1;
 551         while (nr--)
 552                 delete_char(currcons);
 553 }
 554 
 555 static void csi_M(int currcons, unsigned int nr)
     /*  */
 556 {
 557         if (nr > video_num_lines)
 558                 nr = video_num_lines;
 559         else if (!nr)
 560                 nr=1;
 561         while (nr--)
 562                 delete_line(currcons);
 563 }
 564 
 565 static void save_cur(int currcons)
     /*  */
 566 {
 567         saved_x = x;
 568         saved_y = y;
 569 }
 570 
 571 static void restore_cur(int currcons)
     /*  */
 572 {
 573         gotoxy(currcons, saved_x, saved_y);
 574 }
 575 
 576 
 577 enum { ESnormal, ESesc, ESsquare, ESgetpars, ESgotpars, ESfunckey, 
 578         ESsetterm, ESsetgraph, ESgraph, ESgresc, ESignore };
 579 
 580 void con_write(struct tty_struct * tty)
     /*  */
 581 {
 582         unsigned char c;
 583         unsigned int currcons;
 584 
 585         wake_up(&tty->write_q->proc_list);
 586         currcons = tty - tty_table;
 587         if (currcons >= MAX_CONSOLES) {
 588                 printk("con_write: illegal tty\n\r");
 589                 return;
 590         }
 591         while (!EMPTY(tty->write_q)) {
 592                 if (tty->stopped)
 593                         break;
 594                 GETCH(tty->write_q,c);
 595                 if (c == 24 || c == 26)
 596                         state = ESnormal;
 597                 switch(state) {
 598                         case ESnormal:
 599                                 if (translate[c]) {
 600                                         c = translate[c];
 601                                         while (x >= video_num_columns) {
 602                                                 x -= video_num_columns;
 603                                                 pos -= video_size_row;
 604                                                 lf(currcons);
 605                                         }
 606                                         *(char *) pos = c;
 607                                         *(char *) (pos+1) = attr;
 608                                         pos += 2;
 609                                         x++;
 610                                 } else if (c == 27)
 611                                         state = ESesc;
 612                                 else if (c == 10 || c == 11 || c == 12)
 613                                         lf(currcons);
 614                                 else if (c == 13)
 615                                         cr(currcons);
 616                                 else if (c == 127)
 617                                         del(currcons);
 618                                 else if (c == 8) {
 619                                         if (x) {
 620                                                 x--;
 621                                                 pos -= 2;
 622                                         }
 623                                 } else if (c == 9) {
 624                                         c = 8-(x&7);
 625                                         x += c;
 626                                         pos += c<<1;
 627                                         if (x > video_num_columns) {
 628                                                 x -= video_num_columns;
 629                                                 pos -= video_size_row;
 630                                                 lf(currcons);
 631                                         }
 632                                         c = 9;
 633                                 } else if (c == 7)
 634                                         sysbeep();
 635                                 else if (c == 14) {
 636                                         checkin = 1;
 637                                         translate = restate;
 638                                 } else if (c == 15) {
 639                                         translate = NORM_TRANS;
 640                                         checkin = 0;
 641                                 }
 642                                 break;
 643                         case ESesc:
 644                                 state = ESnormal;
 645                                 switch (c) {
 646                                   case '[':
 647                                         state = ESsquare;
 648                                         break;
 649                                   case 'E':
 650                                         gotoxy(currcons,0,y+1);
 651                                         break;
 652                                   case 'M':
 653                                         ri(currcons);
 654                                         break;
 655                                   case 'D':
 656                                         lf(currcons);
 657                                         break;
 658                                   case 'Z':
 659                                         respond(currcons,tty);
 660                                         break;
 661                                   case '7':
 662                                         save_cur(currcons);
 663                                         break;
 664                                   case '8':
 665                                         restore_cur(currcons);
 666                                         break;
 667                                   case '(':
 668                                   case ')':
 669                                         state = ESsetgraph;             
 670                                         break;
 671                                   case 'P':
 672                                         state = ESsetterm;  
 673                                         break;
 674                                   case '#':
 675                                         state = -1;
 676                                         break;          
 677                                   case 'c':
 678                                         tty->termios = DEF_TERMIOS;
 679                                         state = ESnormal;
 680                                         restate = NORM_TRANS;
 681                                         checkin = 0;
 682                                         top = 0;
 683                                         bottom = video_num_lines;
 684                                         translate = NORM_TRANS;
 685                                   case '>':  /* Numeric keypad */
 686                                         kbdapplic = 0;
 687                                         if (currcons == fg_console)
 688                                                 kapplic = 0;
 689                                         break;
 690                                   case '=':  /* Appl. keypad */
 691                                         kbdapplic = 1;
 692                                         if (currcons == fg_console)
 693                                                 kapplic = 1;
 694                                         break;
 695                                 }       
 696                                 break;
 697                         case ESsquare:
 698                                 for(npar = 0 ; npar < NPAR ; npar++)
 699                                         par[npar] = 0;
 700                                 npar = 0;
 701                                 state = ESgetpars;
 702                                 if (c == '[') { /* Function key */
 703                                         state=ESfunckey;
 704                                         break;
 705                                 }  
 706                                 if (ques=(c=='?'))
 707                                         break;
 708                         case ESgetpars:
 709                                 if (c==';' && npar<NPAR-1) {
 710                                         npar++;
 711                                         break;
 712                                 } else if (c>='0' && c<='9') {
 713                                         par[npar] *= 10;
 714                                         par[npar] += c-'0';
 715                                         break;
 716                                 } else state=ESgotpars;
 717                         case ESgotpars:
 718                                 state = ESnormal;
 719                                 if (ques) {
 720                                         ques = 0;
 721                                         break;
 722                                 }  
 723                                 switch(c) {
 724                                         case 'G': case '`':
 725                                                 if (par[0]) par[0]--;
 726                                                 gotoxy(currcons,par[0],y);
 727                                                 break;
 728                                         case 'A':
 729                                                 if (!par[0]) par[0]++;
 730                                                 gotoxy(currcons,x,y-par[0]);
 731                                                 break;
 732                                         case 'B': case 'e':
 733                                                 if (!par[0]) par[0]++;
 734                                                 gotoxy(currcons,x,y+par[0]);
 735                                                 break;
 736                                         case 'C': case 'a':
 737                                                 if (!par[0]) par[0]++;
 738                                                 gotoxy(currcons,x+par[0],y);
 739                                                 break;
 740                                         case 'D':
 741                                                 if (!par[0]) par[0]++;
 742                                                 gotoxy(currcons,x-par[0],y);
 743                                                 break;
 744                                         case 'E':
 745                                                 if (!par[0]) par[0]++;
 746                                                 gotoxy(currcons,0,y+par[0]);
 747                                                 break;
 748                                         case 'F':
 749                                                 if (!par[0]) par[0]++;
 750                                                 gotoxy(currcons,0,y-par[0]);
 751                                                 break;
 752                                         case 'd':
 753                                                 if (par[0]) par[0]--;
 754                                                 gotoxy(currcons,x,par[0]);
 755                                                 break;
 756                                         case 'H': case 'f':
 757                                                 if (par[0]) par[0]--;
 758                                                 if (par[1]) par[1]--;
 759                                                 gotoxy(currcons,par[1],par[0]);
 760                                                 break;
 761                                         case 'J':
 762                                                 csi_J(currcons,par[0]);
 763                                                 break;
 764                                         case 'K':
 765                                                 csi_K(currcons,par[0]);
 766                                                 break;
 767                                         case 'L':
 768                                                 csi_L(currcons,par[0]);
 769                                                 break;
 770                                         case 'M':
 771                                                 csi_M(currcons,par[0]);
 772                                                 break;
 773                                         case 'P':
 774                                                 csi_P(currcons,par[0]);
 775                                                 break;
 776                                         case '@':
 777                                                 csi_at(currcons,par[0]);
 778                                                 break;
 779                                         case 'm':
 780                                                 csi_m(currcons);
 781                                                 break;
 782                                         case 'r':
 783                                                 if (par[0])
 784                                                         par[0]--;
 785                                                 if (!par[1])
 786                                                         par[1] = video_num_lines;
 787                                                 if (par[0] < par[1] &&
 788                                                     par[1] <= video_num_lines) {
 789                                                         top=par[0];
 790                                                         bottom=par[1];
 791                                                 }
 792                                                 break;
 793                                         case 's':
 794                                                 save_cur(currcons);
 795                                                 break;
 796                                         case 'u':
 797                                                 restore_cur(currcons);
 798                                                 break;
 799                                         case 'l': /* blank interval */
 800                                         case 'b': /* bold attribute */
 801                                                 if (!((npar >= 2) &&
 802                                                   ((par[1]-13) == par[0]) && 
 803                                                   ((par[2]-17) == par[0]))) 
 804                                                     break;
 805                                                 if ((c=='l') && (par[0]<=60)) {
 806                                                   blankinterval = HZ*60*par[0];
 807                                                 }
 808                                                 if (c=='b')
 809                                                   vc_cons[currcons].vc_bold_attr
 810                                                     = par[0];
 811                                 }
 812                                 break;
 813                         case ESfunckey:
 814                                 state = ESnormal;
 815                                 break;
 816                         case ESsetterm:  /* Setterm functions. */
 817                                 state = ESnormal;
 818                                 if (c == 'S') {
 819                                         def_attr = attr;
 820                                         video_erase_char = (video_erase_char&0x0ff) | (def_attr<<8);
 821                                 } else if (c == 'L')
 822                                         /*linewrap on*/;
 823                                 else if (c == 'l')
 824                                         /*linewrap off*/;
 825                                 break;
 826                         case ESsetgraph:
 827                                 if (c == '0') { 
 828                                         if (checkin)
 829                                                 translate = GRAF_TRANS;
 830                                         restate = GRAF_TRANS;
 831                                 } else if (c == 'B')
 832                                         translate = restate = NORM_TRANS;
 833                                 state = ESnormal;
 834                                 break;
 835                         default:
 836                                 state = ESnormal;
 837                 }
 838         }
 839         set_cursor(currcons);
 840         timer_active &= ~(1<<BLANK_TIMER);
 841         if (console_blanked) {
 842                 timer_table[BLANK_TIMER].expires = 0;
 843                 timer_active |= 1<<BLANK_TIMER;
 844         } else if (blankinterval) {
 845                 timer_table[BLANK_TIMER].expires = jiffies + blankinterval;
 846                 timer_active |= 1<<BLANK_TIMER;
 847         }
 848 }
 849 
 850 void do_keyboard_interrupt(void)
     /*  */
 851 {
 852         TTY_READ_FLUSH(TTY_TABLE(0));
 853         timer_active &= ~(1<<BLANK_TIMER);
 854         if (console_blanked) {
 855                 timer_table[BLANK_TIMER].expires = 0;
 856                 timer_active |= 1<<BLANK_TIMER;
 857         } else if (blankinterval) {
 858                 timer_table[BLANK_TIMER].expires = jiffies + blankinterval;
 859                 timer_active |= 1<<BLANK_TIMER;
 860         }
 861 }       
 862 
 863 void * memsetw(void * s,unsigned short c,int count)
     /*  */
 864 {
 865 __asm__("cld\n\t"
 866         "rep\n\t"
 867         "stosw"
 868         ::"a" (c),"D" (s),"c" (count)
 869         :"cx","di");
 870 return s;
 871 }
 872 
 873 /*
 874  *  void con_init(void);
 875  *
 876  * This routine initalizes console interrupts, and does nothing
 877  * else. If you want the screen to clear, call tty_write with
 878  * the appropriate escape-sequece.
 879  *
 880  * Reads the information preserved by setup.s to determine the current display
 881  * type and sets everything accordingly.
 882  */
 883 void con_init(void)
     /*  */
 884 {
 885         register unsigned char a;
 886         char *display_desc = "????";
 887         char *display_ptr;
 888         int currcons = 0;
 889         long base, term;
 890         long video_memory;
 891         long saveterm, savebase;
 892 
 893         video_num_columns = ORIG_VIDEO_COLS;
 894         video_size_row = video_num_columns * 2;
 895         video_num_lines = ORIG_VIDEO_LINES;
 896         video_page = ORIG_VIDEO_PAGE;
 897         video_erase_char = 0x0720;
 898         timer_table[BLANK_TIMER].fn = blank_screen;
 899         timer_table[BLANK_TIMER].expires = 0;
 900         if (blankinterval) {
 901                 timer_table[BLANK_TIMER].expires = jiffies+blankinterval;
 902                 timer_active |= 1<<BLANK_TIMER;
 903         }
 904         
 905         if (ORIG_VIDEO_MODE == 7)       /* Is this a monochrome display? */
 906         {
 907                 video_mem_base = 0xb0000;
 908                 video_port_reg = 0x3b4;
 909                 video_port_val = 0x3b5;
 910                 if ((ORIG_VIDEO_EGA_BX & 0xff) != 0x10)
 911                 {
 912                         video_type = VIDEO_TYPE_EGAM;
 913                         video_mem_term = 0xb8000;
 914                         display_desc = "EGAm";
 915                 }
 916                 else
 917                 {
 918                         video_type = VIDEO_TYPE_MDA;
 919                         video_mem_term = 0xb2000;
 920                         display_desc = "*MDA";
 921                 }
 922         }
 923         else                            /* If not, it is color. */
 924         {
 925                 can_do_colour = 1;
 926                 video_mem_base = 0xb8000;
 927                 video_port_reg  = 0x3d4;
 928                 video_port_val  = 0x3d5;
 929                 if ((ORIG_VIDEO_EGA_BX & 0xff) != 0x10)
 930                 {
 931                         video_type = VIDEO_TYPE_EGAC;
 932                         video_mem_term = 0xc0000;
 933                         display_desc = "EGAc";
 934                 }
 935                 else
 936                 {
 937                         video_type = VIDEO_TYPE_CGA;
 938                         video_mem_term = 0xba000;
 939                         display_desc = "*CGA";
 940                 }
 941         }
 942         
 943         /* Let the user known what kind of display driver we are using */
 944         
 945         display_ptr = ((char *)video_mem_base) + video_size_row - 8;
 946         while (*display_desc)
 947         {
 948                 *display_ptr++ = *display_desc++;
 949                 display_ptr++;
 950         }
 951         
 952         savebase = video_mem_base;
 953         saveterm = video_mem_term;
 954         memsetw(vc_scrmembuf,video_erase_char,MEM_BUFFER_SIZE/2);
 955         video_mem_base = (long)vc_scrmembuf;
 956         video_mem_term = (long)&(vc_scrmembuf[MEM_BUFFER_SIZE/2]);
 957         video_memory = video_mem_term - video_mem_base;
 958         screen_size = (video_num_lines * video_size_row);
 959         NR_CONSOLES = video_memory / screen_size;
 960         if (NR_CONSOLES > MAX_CONSOLES)
 961                 NR_CONSOLES = MAX_CONSOLES;
 962         if (!NR_CONSOLES)
 963                 NR_CONSOLES = 1;
 964         video_memory = screen_size;
 965         
 966         /* Initialize the variables used for scrolling (mostly EGA/VGA) */
 967         
 968         base = origin = video_mem_start = video_mem_base;
 969         term = video_mem_end = base + video_memory;
 970         scr_end = video_mem_start + screen_size;
 971         top     = 0;
 972         bottom  = video_num_lines;
 973         attr = 0x07;
 974         def_attr = 0x07;
 975         restate = NORM_TRANS;
 976         state = ESnormal;
 977         checkin = 0;
 978         ques = 0;
 979         iscolor = 0;
 980         translate = NORM_TRANS;
 981         kbdleds = 2;
 982         kbdmode = 0;
 983         kbdraw = 0;
 984         kbde0 = 0;
 985         kbdapplic = 0;
 986         vc_cons[0].vc_bold_attr = -1;
 987 
 988         gotoxy(currcons,ORIG_X,ORIG_Y);
 989         for (currcons = 1; currcons<NR_CONSOLES; currcons++) {
 990                 vc_cons[currcons] = vc_cons[0];
 991                 origin = video_mem_start = (base += video_memory);
 992                 scr_end = origin + video_num_lines * video_size_row;
 993                 video_mem_end = (term += video_memory);
 994                 gotoxy(currcons,0,0);
 995         }
 996         for (currcons = 0; currcons<NR_CONSOLES; currcons++) 
 997                 vc_scrbuf[currcons] = (unsigned short *)origin;
 998         currcons = 0;   
 999         video_mem_base = savebase;
1000         video_mem_term = saveterm;
1001         
1002         video_mem_start = video_mem_base;
1003         video_mem_end = video_mem_term;
1004         origin  = video_mem_start;
1005         scr_end = video_mem_start + video_num_lines * video_size_row;
1006         top     = 0;
1007         bottom  = video_num_lines; 
1008         pos=origin + y*video_size_row + (x<<1);
1009         update_screen(fg_console);
1010         set_trap_gate(0x21,&keyboard_interrupt);
1011         outb_p(inb_p(0x21)&0xfd,0x21);
1012         a=inb_p(0x61);
1013         outb_p(a|0x80,0x61);
1014         outb_p(a,0x61);
1015 
1016         vt_init();
1017 }
1018 
1019 void kbdsave(int new_console)
     /*  */
1020 {
1021         int currcons = fg_console;
1022         kbdmode = kmode;
1023         kbdraw = kraw;
1024         kbde0 = ke0;
1025         kbdleds = kleds;
1026         kbdapplic = kapplic;
1027         currcons = new_console;
1028         kmode = (kmode & 0x3F) | (kbdmode & 0xC0);
1029         kraw = kbdraw;
1030         ke0 = kbde0;
1031         kleds = kbdleds;
1032         kapplic = kbdapplic;
1033         set_leds();
1034 }
1035 
1036 static void get_scrmem(int currcons)
     /*  */
1037 {
1038         memcpy((void *)vc_scrbuf[fg_console],(void *)origin, screen_size);
1039         video_mem_start = (unsigned long)vc_scrbuf[fg_console];
1040         origin  = video_mem_start;
1041         scr_end = video_mem_end = video_mem_start+screen_size;
1042         pos = origin + y*video_size_row + (x<<1);
1043 }
1044 
1045 static void set_scrmem(int currcons)
     /*  */
1046 {
1047         video_mem_start = video_mem_base;
1048         video_mem_end = video_mem_term;
1049         origin  = video_mem_start;
1050         scr_end = video_mem_start + screen_size;
1051         pos = origin + y*video_size_row + (x<<1);
1052         memcpy((void *)video_mem_base, (void *)vc_scrbuf[fg_console], screen_size);
1053 }
1054 
1055 void blank_screen(void)
     /*  */
1056 {
1057         timer_table[BLANK_TIMER].fn = unblank_screen;
1058         get_scrmem(fg_console);
1059         hide_cursor(fg_console);
1060         console_blanked = 1;
1061         memsetw((void *)video_mem_base, 0x0020, video_mem_term-video_mem_base );
1062 }
1063 
1064 void unblank_screen(void)
     /*  */
1065 {
1066         timer_table[BLANK_TIMER].fn = blank_screen;
1067         if (blankinterval) {
1068                 timer_table[BLANK_TIMER].expires = jiffies + blankinterval;
1069                 timer_active |= 1<<BLANK_TIMER;
1070         }
1071         console_blanked = 0;
1072         set_scrmem(fg_console);
1073         set_origin(fg_console);
1074         set_cursor(fg_console);
1075 }
1076 
1077 void update_screen(int new_console)
     /*  */
1078 {
1079         static int lock = 0;
1080 
1081         if (new_console == fg_console || lock)
1082                 return;
1083         lock = 1;
1084         kbdsave(new_console);
1085         get_scrmem(fg_console); 
1086         fg_console = new_console;
1087         set_scrmem(fg_console); 
1088         set_origin(fg_console);
1089         set_cursor(new_console);
1090         lock = 0;
1091 }
1092 
1093 /* from bsd-net-2: */
1094 
1095 static void sysbeepstop(void)
     /*  */
1096 {
1097         /* disable counter 2 */
1098         outb(inb_p(0x61)&0xFC, 0x61);
1099 }
1100 
1101 static void sysbeep(void)
     /*  */
1102 {
1103         /* enable counter 2 */
1104         outb_p(inb_p(0x61)|3, 0x61);
1105         /* set command for counter 2, 2 byte write */
1106         outb_p(0xB6, 0x43);
1107         /* send 0x637 for 750 HZ */
1108         outb_p(0x37, 0x42);
1109         outb(0x06, 0x42);
1110         /* 1/8 second */
1111         timer_table[BEEP_TIMER].expires = jiffies + HZ/8;
1112         timer_table[BEEP_TIMER].fn = sysbeepstop;
1113         timer_active |= 1<<BEEP_TIMER;
1114 }
1115 
1116 int do_screendump(int arg)
     /*  */
1117 {
1118         char *sptr, *buf = (char *)arg;
1119         int currcons, l;
1120 
1121         verify_area(buf,2+video_num_columns*video_num_lines);
1122         currcons = get_fs_byte(buf+1);
1123         if ((currcons<0) || (currcons>NR_CONSOLES))
1124                 return -EIO;
1125         put_fs_byte((char)(video_num_lines),buf++);     
1126         put_fs_byte((char)(video_num_columns),buf++);
1127         currcons = (currcons ? currcons-1 : fg_console);
1128         sptr = (char *) origin;
1129         for (l=video_num_lines*video_num_columns; l>0 ; l--, sptr++)
1130                 put_fs_byte(*sptr++,buf++);     
1131         return(0);
1132 }
1133 
1134 void console_print(const char * b)
     /*  */
1135 {
1136         int currcons = fg_console;
1137         char c;
1138 
1139         if (currcons<0 || currcons>=NR_CONSOLES)
1140                 currcons = 0;
1141         if (vt_info[currcons].mode == KD_GRAPHICS)
1142                 return; /* no output in graphics mode */
1143         while (c = *(b++)) {
1144                 if (c == 10) {
1145                         cr(currcons);
1146                         lf(currcons);
1147                         continue;
1148                 }
1149                 if (c == 13) {
1150                         cr(currcons);
1151                         continue;
1152                 }
1153                 while (x >= video_num_columns) {
1154                         x -= video_num_columns;
1155                         pos -= video_size_row;
1156                         lf(currcons);
1157                 }
1158                 *(char *) pos = c;
1159                 *(char *) (pos+1) = attr;
1160                 pos += 2;
1161                 x++;
1162         }
1163         set_cursor(currcons);
1164 }
/* */
root/kernel/chr_drv/console.c

DEFINITIONS
