1 /* 2 * Copyright (C) 1991, 1992 Linus Torvalds 3 */ 4 5 /* 6 * Hopefully this will be a rather complete VT102 implementation. 7 * 8 * Beeping thanks to John T Kohl. 9 * 10 * Virtual Consoles, Screen Blanking, Screen Dumping, Color, Graphics 11 * Chars, and VT100 enhancements by Peter MacDonald. 12 * 13 * Copy and paste function by Andrew Haylett, 14 * some enhancements by Alessandro Rubini. 15 * 16 * Code to check for different video-cards mostly by Galen Hunt, 17 * <g-hunt@ee.utah.edu> 18 * 19 * Rudimentary ISO 10646/Unicode/UTF-8 character set support by 20 * Markus Kuhn, <mskuhn@immd4.informatik.uni-erlangen.de>. 21 * 22 * Dynamic allocation of consoles, aeb@cwi.nl, May 1994 23 * Resizing of consoles, aeb, 940926 24 * 25 * Code for xterm like mouse click reporting by Peter Orbaek 20-Jul-94 26 * <poe@daimi.aau.dk> 27 * 28 * User-defined bell sound, new setterm control sequences and printk 29 * redirection by Martin Mares <mj@k332.feld.cvut.cz> 19-Nov-95 30 * 31 * APM screenblank bug fixed Takashi Manabe <manabe@roy.dsl.tutics.tut.jp> 32 * 33 * Merge with the abstract console driver by Geert Uytterhoeven 34 * <geert@linux-m68k.org>, Jan 1997. 35 * 36 * Original m68k console driver modifications by 37 * 38 * - Arno Griffioen <arno@usn.nl> 39 * - David Carter <carter@cs.bris.ac.uk> 40 * 41 * The abstract console driver provides a generic interface for a text 42 * console. It supports VGA text mode, frame buffer based graphical consoles 43 * and special graphics processors that are only accessible through some 44 * registers (e.g. a TMS340x0 GSP). 45 * 46 * The interface to the hardware is specified using a special structure 47 * (struct consw) which contains function pointers to console operations 48 * (see <linux/console.h> for more information). 49 * 50 * Support for changeable cursor shape 51 * by Pavel Machek <pavel@atrey.karlin.mff.cuni.cz>, August 1997 52 * 53 * Ported to i386 and con_scrolldelta fixed 54 * by Emmanuel Marty <core@ggi-project.org>, April 1998 55 * 56 * Resurrected character buffers in videoram plus lots of other trickery 57 * by Martin Mares <mj@atrey.karlin.mff.cuni.cz>, July 1998 58 * 59 * Removed old-style timers, introduced console_timer, made timer 60 * deletion SMP-safe. 17Jun00, Andrew Morton 61 * 62 * Removed console_lock, enabled interrupts across all console operations 63 * 13 March 2001, Andrew Morton 64 * 65 * Fixed UTF-8 mode so alternate charset modes always work according 66 * to control sequences interpreted in do_con_trol function 67 * preserving backward VT100 semigraphics compatibility, 68 * malformed UTF sequences represented as sequences of replacement glyphs, 69 * original codes or '?' as a last resort if replacement glyph is undefined 70 * by Adam Tla/lka <atlka@pg.gda.pl>, Aug 2006 71 */ 72 73 #include <linux/module.h> 74 #include <linux/types.h> 75 #include <linux/sched.h> 76 #include <linux/tty.h> 77 #include <linux/tty_flip.h> 78 #include <linux/kernel.h> 79 #include <linux/string.h> 80 #include <linux/errno.h> 81 #include <linux/kd.h> 82 #include <linux/slab.h> 83 #include <linux/major.h> 84 #include <linux/mm.h> 85 #include <linux/console.h> 86 #include <linux/init.h> 87 #include <linux/mutex.h> 88 #include <linux/vt_kern.h> 89 #include <linux/selection.h> 90 #include <linux/tiocl.h> 91 #include <linux/kbd_kern.h> 92 #include <linux/consolemap.h> 93 #include <linux/timer.h> 94 #include <linux/interrupt.h> 95 #include <linux/workqueue.h> 96 #include <linux/pm.h> 97 #include <linux/font.h> 98 #include <linux/bitops.h> 99 #include <linux/notifier.h> 100 #include <linux/device.h> 101 #include <linux/io.h> 102 #include <linux/uaccess.h> 103 #include <linux/kdb.h> 104 #include <linux/ctype.h> 105 106 #define MAX_NR_CON_DRIVER 16 107 108 #define CON_DRIVER_FLAG_MODULE 1 109 #define CON_DRIVER_FLAG_INIT 2 110 #define CON_DRIVER_FLAG_ATTR 4 111 112 struct con_driver { 113 const struct consw *con; 114 const char *desc; 115 struct device *dev; 116 int node; 117 int first; 118 int last; 119 int flag; 120 }; 121 122 static struct con_driver registered_con_driver[MAX_NR_CON_DRIVER]; 123 const struct consw *conswitchp; 124 125 /* A bitmap for codes <32. A bit of 1 indicates that the code 126 * corresponding to that bit number invokes some special action 127 * (such as cursor movement) and should not be displayed as a 128 * glyph unless the disp_ctrl mode is explicitly enabled. 129 */ 130 #define CTRL_ACTION 0x0d00ff81 131 #define CTRL_ALWAYS 0x0800f501 /* Cannot be overridden by disp_ctrl */ 132 133 /* 134 * Here is the default bell parameters: 750HZ, 1/8th of a second 135 */ 136 #define DEFAULT_BELL_PITCH 750 137 #define DEFAULT_BELL_DURATION (HZ/8) 138 139 struct vc vc_cons [MAX_NR_CONSOLES]; 140 141 #ifndef VT_SINGLE_DRIVER 142 static const struct consw *con_driver_map[MAX_NR_CONSOLES]; 143 #endif 144 145 static int con_open(struct tty_struct *, struct file *); 146 static void vc_init(struct vc_data *vc, unsigned int rows, 147 unsigned int cols, int do_clear); 148 static void gotoxy(struct vc_data *vc, int new_x, int new_y); 149 static void save_cur(struct vc_data *vc); 150 static void reset_terminal(struct vc_data *vc, int do_clear); 151 static void con_flush_chars(struct tty_struct *tty); 152 static int set_vesa_blanking(char __user *p); 153 static void set_cursor(struct vc_data *vc); 154 static void hide_cursor(struct vc_data *vc); 155 static void console_callback(struct work_struct *ignored); 156 static void blank_screen_t(unsigned long dummy); 157 static void set_palette(struct vc_data *vc); 158 159 static int printable; /* Is console ready for printing? */ 160 int default_utf8 = true; 161 module_param(default_utf8, int, S_IRUGO | S_IWUSR); 162 int global_cursor_default = -1; 163 module_param(global_cursor_default, int, S_IRUGO | S_IWUSR); 164 165 static int cur_default = CUR_DEFAULT; 166 module_param(cur_default, int, S_IRUGO | S_IWUSR); 167 168 /* 169 * ignore_poke: don't unblank the screen when things are typed. This is 170 * mainly for the privacy of braille terminal users. 171 */ 172 static int ignore_poke; 173 174 int do_poke_blanked_console; 175 int console_blanked; 176 177 static int vesa_blank_mode; /* 0:none 1:suspendV 2:suspendH 3:powerdown */ 178 static int vesa_off_interval; 179 static int blankinterval = 10*60; 180 core_param(consoleblank, blankinterval, int, 0444); 181 182 static DECLARE_WORK(console_work, console_callback); 183 184 /* 185 * fg_console is the current virtual console, 186 * last_console is the last used one, 187 * want_console is the console we want to switch to, 188 * saved_* variants are for save/restore around kernel debugger enter/leave 189 */ 190 int fg_console; 191 int last_console; 192 int want_console = -1; 193 static int saved_fg_console; 194 static int saved_last_console; 195 static int saved_want_console; 196 static int saved_vc_mode; 197 static int saved_console_blanked; 198 199 /* 200 * For each existing display, we have a pointer to console currently visible 201 * on that display, allowing consoles other than fg_console to be refreshed 202 * appropriately. Unless the low-level driver supplies its own display_fg 203 * variable, we use this one for the "master display". 204 */ 205 static struct vc_data *master_display_fg; 206 207 /* 208 * Unfortunately, we need to delay tty echo when we're currently writing to the 209 * console since the code is (and always was) not re-entrant, so we schedule 210 * all flip requests to process context with schedule-task() and run it from 211 * console_callback(). 212 */ 213 214 /* 215 * For the same reason, we defer scrollback to the console callback. 216 */ 217 static int scrollback_delta; 218 219 /* 220 * Hook so that the power management routines can (un)blank 221 * the console on our behalf. 222 */ 223 int (*console_blank_hook)(int); 224 225 static DEFINE_TIMER(console_timer, blank_screen_t, 0, 0); 226 static int blank_state; 227 static int blank_timer_expired; 228 enum { 229 blank_off = 0, 230 blank_normal_wait, 231 blank_vesa_wait, 232 }; 233 234 /* 235 * /sys/class/tty/tty0/ 236 * 237 * the attribute 'active' contains the name of the current vc 238 * console and it supports poll() to detect vc switches 239 */ 240 static struct device *tty0dev; 241 242 /* 243 * Notifier list for console events. 244 */ 245 static ATOMIC_NOTIFIER_HEAD(vt_notifier_list); 246 247 int register_vt_notifier(struct notifier_block *nb) 248 { 249 return atomic_notifier_chain_register(&vt_notifier_list, nb); 250 } 251 EXPORT_SYMBOL_GPL(register_vt_notifier); 252 253 int unregister_vt_notifier(struct notifier_block *nb) 254 { 255 return atomic_notifier_chain_unregister(&vt_notifier_list, nb); 256 } 257 EXPORT_SYMBOL_GPL(unregister_vt_notifier); 258 259 static void notify_write(struct vc_data *vc, unsigned int unicode) 260 { 261 struct vt_notifier_param param = { .vc = vc, .c = unicode }; 262 atomic_notifier_call_chain(&vt_notifier_list, VT_WRITE, ¶m); 263 } 264 265 static void notify_update(struct vc_data *vc) 266 { 267 struct vt_notifier_param param = { .vc = vc }; 268 atomic_notifier_call_chain(&vt_notifier_list, VT_UPDATE, ¶m); 269 } 270 /* 271 * Low-Level Functions 272 */ 273 274 #define IS_FG(vc) ((vc)->vc_num == fg_console) 275 276 #ifdef VT_BUF_VRAM_ONLY 277 #define DO_UPDATE(vc) 0 278 #else 279 #define DO_UPDATE(vc) (CON_IS_VISIBLE(vc) && !console_blanked) 280 #endif 281 282 static inline unsigned short *screenpos(struct vc_data *vc, int offset, int viewed) 283 { 284 unsigned short *p; 285 286 if (!viewed) 287 p = (unsigned short *)(vc->vc_origin + offset); 288 else if (!vc->vc_sw->con_screen_pos) 289 p = (unsigned short *)(vc->vc_visible_origin + offset); 290 else 291 p = vc->vc_sw->con_screen_pos(vc, offset); 292 return p; 293 } 294 295 /* Called from the keyboard irq path.. */ 296 static inline void scrolldelta(int lines) 297 { 298 /* FIXME */ 299 /* scrolldelta needs some kind of consistency lock, but the BKL was 300 and still is not protecting versus the scheduled back end */ 301 scrollback_delta += lines; 302 schedule_console_callback(); 303 } 304 305 void schedule_console_callback(void) 306 { 307 schedule_work(&console_work); 308 } 309 310 static void scrup(struct vc_data *vc, unsigned int t, unsigned int b, int nr) 311 { 312 unsigned short *d, *s; 313 314 if (t+nr >= b) 315 nr = b - t - 1; 316 if (b > vc->vc_rows || t >= b || nr < 1) 317 return; 318 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_UP, nr)) 319 return; 320 d = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t); 321 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * (t + nr)); 322 scr_memmovew(d, s, (b - t - nr) * vc->vc_size_row); 323 scr_memsetw(d + (b - t - nr) * vc->vc_cols, vc->vc_video_erase_char, 324 vc->vc_size_row * nr); 325 } 326 327 static void scrdown(struct vc_data *vc, unsigned int t, unsigned int b, int nr) 328 { 329 unsigned short *s; 330 unsigned int step; 331 332 if (t+nr >= b) 333 nr = b - t - 1; 334 if (b > vc->vc_rows || t >= b || nr < 1) 335 return; 336 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_DOWN, nr)) 337 return; 338 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t); 339 step = vc->vc_cols * nr; 340 scr_memmovew(s + step, s, (b - t - nr) * vc->vc_size_row); 341 scr_memsetw(s, vc->vc_video_erase_char, 2 * step); 342 } 343 344 static void do_update_region(struct vc_data *vc, unsigned long start, int count) 345 { 346 #ifndef VT_BUF_VRAM_ONLY 347 unsigned int xx, yy, offset; 348 u16 *p; 349 350 p = (u16 *) start; 351 if (!vc->vc_sw->con_getxy) { 352 offset = (start - vc->vc_origin) / 2; 353 xx = offset % vc->vc_cols; 354 yy = offset / vc->vc_cols; 355 } else { 356 int nxx, nyy; 357 start = vc->vc_sw->con_getxy(vc, start, &nxx, &nyy); 358 xx = nxx; yy = nyy; 359 } 360 for(;;) { 361 u16 attrib = scr_readw(p) & 0xff00; 362 int startx = xx; 363 u16 *q = p; 364 while (xx < vc->vc_cols && count) { 365 if (attrib != (scr_readw(p) & 0xff00)) { 366 if (p > q) 367 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx); 368 startx = xx; 369 q = p; 370 attrib = scr_readw(p) & 0xff00; 371 } 372 p++; 373 xx++; 374 count--; 375 } 376 if (p > q) 377 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx); 378 if (!count) 379 break; 380 xx = 0; 381 yy++; 382 if (vc->vc_sw->con_getxy) { 383 p = (u16 *)start; 384 start = vc->vc_sw->con_getxy(vc, start, NULL, NULL); 385 } 386 } 387 #endif 388 } 389 390 void update_region(struct vc_data *vc, unsigned long start, int count) 391 { 392 WARN_CONSOLE_UNLOCKED(); 393 394 if (DO_UPDATE(vc)) { 395 hide_cursor(vc); 396 do_update_region(vc, start, count); 397 set_cursor(vc); 398 } 399 } 400 401 /* Structure of attributes is hardware-dependent */ 402 403 static u8 build_attr(struct vc_data *vc, u8 _color, u8 _intensity, u8 _blink, 404 u8 _underline, u8 _reverse, u8 _italic) 405 { 406 if (vc->vc_sw->con_build_attr) 407 return vc->vc_sw->con_build_attr(vc, _color, _intensity, 408 _blink, _underline, _reverse, _italic); 409 410 #ifndef VT_BUF_VRAM_ONLY 411 /* 412 * ++roman: I completely changed the attribute format for monochrome 413 * mode (!can_do_color). The formerly used MDA (monochrome display 414 * adapter) format didn't allow the combination of certain effects. 415 * Now the attribute is just a bit vector: 416 * Bit 0..1: intensity (0..2) 417 * Bit 2 : underline 418 * Bit 3 : reverse 419 * Bit 7 : blink 420 */ 421 { 422 u8 a = _color; 423 if (!vc->vc_can_do_color) 424 return _intensity | 425 (_italic ? 2 : 0) | 426 (_underline ? 4 : 0) | 427 (_reverse ? 8 : 0) | 428 (_blink ? 0x80 : 0); 429 if (_italic) 430 a = (a & 0xF0) | vc->vc_itcolor; 431 else if (_underline) 432 a = (a & 0xf0) | vc->vc_ulcolor; 433 else if (_intensity == 0) 434 a = (a & 0xf0) | vc->vc_ulcolor; 435 if (_reverse) 436 a = ((a) & 0x88) | ((((a) >> 4) | ((a) << 4)) & 0x77); 437 if (_blink) 438 a ^= 0x80; 439 if (_intensity == 2) 440 a ^= 0x08; 441 if (vc->vc_hi_font_mask == 0x100) 442 a <<= 1; 443 return a; 444 } 445 #else 446 return 0; 447 #endif 448 } 449 450 static void update_attr(struct vc_data *vc) 451 { 452 vc->vc_attr = build_attr(vc, vc->vc_color, vc->vc_intensity, 453 vc->vc_blink, vc->vc_underline, 454 vc->vc_reverse ^ vc->vc_decscnm, vc->vc_italic); 455 vc->vc_video_erase_char = (build_attr(vc, vc->vc_color, 1, vc->vc_blink, 0, vc->vc_decscnm, 0) << 8) | ' '; 456 } 457 458 /* Note: inverting the screen twice should revert to the original state */ 459 void invert_screen(struct vc_data *vc, int offset, int count, int viewed) 460 { 461 unsigned short *p; 462 463 WARN_CONSOLE_UNLOCKED(); 464 465 count /= 2; 466 p = screenpos(vc, offset, viewed); 467 if (vc->vc_sw->con_invert_region) 468 vc->vc_sw->con_invert_region(vc, p, count); 469 #ifndef VT_BUF_VRAM_ONLY 470 else { 471 u16 *q = p; 472 int cnt = count; 473 u16 a; 474 475 if (!vc->vc_can_do_color) { 476 while (cnt--) { 477 a = scr_readw(q); 478 a ^= 0x0800; 479 scr_writew(a, q); 480 q++; 481 } 482 } else if (vc->vc_hi_font_mask == 0x100) { 483 while (cnt--) { 484 a = scr_readw(q); 485 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) | (((a) & 0x0e00) << 4); 486 scr_writew(a, q); 487 q++; 488 } 489 } else { 490 while (cnt--) { 491 a = scr_readw(q); 492 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | (((a) & 0x0700) << 4); 493 scr_writew(a, q); 494 q++; 495 } 496 } 497 } 498 #endif 499 if (DO_UPDATE(vc)) 500 do_update_region(vc, (unsigned long) p, count); 501 } 502 503 /* used by selection: complement pointer position */ 504 void complement_pos(struct vc_data *vc, int offset) 505 { 506 static int old_offset = -1; 507 static unsigned short old; 508 static unsigned short oldx, oldy; 509 510 WARN_CONSOLE_UNLOCKED(); 511 512 if (old_offset != -1 && old_offset >= 0 && 513 old_offset < vc->vc_screenbuf_size) { 514 scr_writew(old, screenpos(vc, old_offset, 1)); 515 if (DO_UPDATE(vc)) 516 vc->vc_sw->con_putc(vc, old, oldy, oldx); 517 } 518 519 old_offset = offset; 520 521 if (offset != -1 && offset >= 0 && 522 offset < vc->vc_screenbuf_size) { 523 unsigned short new; 524 unsigned short *p; 525 p = screenpos(vc, offset, 1); 526 old = scr_readw(p); 527 new = old ^ vc->vc_complement_mask; 528 scr_writew(new, p); 529 if (DO_UPDATE(vc)) { 530 oldx = (offset >> 1) % vc->vc_cols; 531 oldy = (offset >> 1) / vc->vc_cols; 532 vc->vc_sw->con_putc(vc, new, oldy, oldx); 533 } 534 } 535 536 } 537 538 static void insert_char(struct vc_data *vc, unsigned int nr) 539 { 540 unsigned short *p = (unsigned short *) vc->vc_pos; 541 542 scr_memmovew(p + nr, p, (vc->vc_cols - vc->vc_x - nr) * 2); 543 scr_memsetw(p, vc->vc_video_erase_char, nr * 2); 544 vc->vc_need_wrap = 0; 545 if (DO_UPDATE(vc)) 546 do_update_region(vc, (unsigned long) p, 547 vc->vc_cols - vc->vc_x); 548 } 549 550 static void delete_char(struct vc_data *vc, unsigned int nr) 551 { 552 unsigned short *p = (unsigned short *) vc->vc_pos; 553 554 scr_memcpyw(p, p + nr, (vc->vc_cols - vc->vc_x - nr) * 2); 555 scr_memsetw(p + vc->vc_cols - vc->vc_x - nr, vc->vc_video_erase_char, 556 nr * 2); 557 vc->vc_need_wrap = 0; 558 if (DO_UPDATE(vc)) 559 do_update_region(vc, (unsigned long) p, 560 vc->vc_cols - vc->vc_x); 561 } 562 563 static int softcursor_original; 564 565 static void add_softcursor(struct vc_data *vc) 566 { 567 int i = scr_readw((u16 *) vc->vc_pos); 568 u32 type = vc->vc_cursor_type; 569 570 if (! (type & 0x10)) return; 571 if (softcursor_original != -1) return; 572 softcursor_original = i; 573 i |= ((type >> 8) & 0xff00 ); 574 i ^= ((type) & 0xff00 ); 575 if ((type & 0x20) && ((softcursor_original & 0x7000) == (i & 0x7000))) i ^= 0x7000; 576 if ((type & 0x40) && ((i & 0x700) == ((i & 0x7000) >> 4))) i ^= 0x0700; 577 scr_writew(i, (u16 *) vc->vc_pos); 578 if (DO_UPDATE(vc)) 579 vc->vc_sw->con_putc(vc, i, vc->vc_y, vc->vc_x); 580 } 581 582 static void hide_softcursor(struct vc_data *vc) 583 { 584 if (softcursor_original != -1) { 585 scr_writew(softcursor_original, (u16 *)vc->vc_pos); 586 if (DO_UPDATE(vc)) 587 vc->vc_sw->con_putc(vc, softcursor_original, 588 vc->vc_y, vc->vc_x); 589 softcursor_original = -1; 590 } 591 } 592 593 static void hide_cursor(struct vc_data *vc) 594 { 595 if (vc == sel_cons) 596 clear_selection(); 597 vc->vc_sw->con_cursor(vc, CM_ERASE); 598 hide_softcursor(vc); 599 } 600 601 static void set_cursor(struct vc_data *vc) 602 { 603 if (!IS_FG(vc) || console_blanked || 604 vc->vc_mode == KD_GRAPHICS) 605 return; 606 if (vc->vc_deccm) { 607 if (vc == sel_cons) 608 clear_selection(); 609 add_softcursor(vc); 610 if ((vc->vc_cursor_type & 0x0f) != 1) 611 vc->vc_sw->con_cursor(vc, CM_DRAW); 612 } else 613 hide_cursor(vc); 614 } 615 616 static void set_origin(struct vc_data *vc) 617 { 618 WARN_CONSOLE_UNLOCKED(); 619 620 if (!CON_IS_VISIBLE(vc) || 621 !vc->vc_sw->con_set_origin || 622 !vc->vc_sw->con_set_origin(vc)) 623 vc->vc_origin = (unsigned long)vc->vc_screenbuf; 624 vc->vc_visible_origin = vc->vc_origin; 625 vc->vc_scr_end = vc->vc_origin + vc->vc_screenbuf_size; 626 vc->vc_pos = vc->vc_origin + vc->vc_size_row * vc->vc_y + 2 * vc->vc_x; 627 } 628 629 static inline void save_screen(struct vc_data *vc) 630 { 631 WARN_CONSOLE_UNLOCKED(); 632 633 if (vc->vc_sw->con_save_screen) 634 vc->vc_sw->con_save_screen(vc); 635 } 636 637 /* 638 * Redrawing of screen 639 */ 640 641 void clear_buffer_attributes(struct vc_data *vc) 642 { 643 unsigned short *p = (unsigned short *)vc->vc_origin; 644 int count = vc->vc_screenbuf_size / 2; 645 int mask = vc->vc_hi_font_mask | 0xff; 646 647 for (; count > 0; count--, p++) { 648 scr_writew((scr_readw(p)&mask) | (vc->vc_video_erase_char & ~mask), p); 649 } 650 } 651 652 void redraw_screen(struct vc_data *vc, int is_switch) 653 { 654 int redraw = 0; 655 656 WARN_CONSOLE_UNLOCKED(); 657 658 if (!vc) { 659 /* strange ... */ 660 /* printk("redraw_screen: tty %d not allocated ??\n", new_console+1); */ 661 return; 662 } 663 664 if (is_switch) { 665 struct vc_data *old_vc = vc_cons[fg_console].d; 666 if (old_vc == vc) 667 return; 668 if (!CON_IS_VISIBLE(vc)) 669 redraw = 1; 670 *vc->vc_display_fg = vc; 671 fg_console = vc->vc_num; 672 hide_cursor(old_vc); 673 if (!CON_IS_VISIBLE(old_vc)) { 674 save_screen(old_vc); 675 set_origin(old_vc); 676 } 677 if (tty0dev) 678 sysfs_notify(&tty0dev->kobj, NULL, "active"); 679 } else { 680 hide_cursor(vc); 681 redraw = 1; 682 } 683 684 if (redraw) { 685 int update; 686 int old_was_color = vc->vc_can_do_color; 687 688 set_origin(vc); 689 update = vc->vc_sw->con_switch(vc); 690 set_palette(vc); 691 /* 692 * If console changed from mono<->color, the best we can do 693 * is to clear the buffer attributes. As it currently stands, 694 * rebuilding new attributes from the old buffer is not doable 695 * without overly complex code. 696 */ 697 if (old_was_color != vc->vc_can_do_color) { 698 update_attr(vc); 699 clear_buffer_attributes(vc); 700 } 701 702 /* Forcibly update if we're panicing */ 703 if ((update && vc->vc_mode != KD_GRAPHICS) || 704 vt_force_oops_output(vc)) 705 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2); 706 } 707 set_cursor(vc); 708 if (is_switch) { 709 set_leds(); 710 compute_shiftstate(); 711 notify_update(vc); 712 } 713 } 714 715 /* 716 * Allocation, freeing and resizing of VTs. 717 */ 718 719 int vc_cons_allocated(unsigned int i) 720 { 721 return (i < MAX_NR_CONSOLES && vc_cons[i].d); 722 } 723 724 static void visual_init(struct vc_data *vc, int num, int init) 725 { 726 /* ++Geert: vc->vc_sw->con_init determines console size */ 727 if (vc->vc_sw) 728 module_put(vc->vc_sw->owner); 729 vc->vc_sw = conswitchp; 730 #ifndef VT_SINGLE_DRIVER 731 if (con_driver_map[num]) 732 vc->vc_sw = con_driver_map[num]; 733 #endif 734 __module_get(vc->vc_sw->owner); 735 vc->vc_num = num; 736 vc->vc_display_fg = &master_display_fg; 737 vc->vc_uni_pagedir_loc = &vc->vc_uni_pagedir; 738 vc->vc_uni_pagedir = 0; 739 vc->vc_hi_font_mask = 0; 740 vc->vc_complement_mask = 0; 741 vc->vc_can_do_color = 0; 742 vc->vc_panic_force_write = false; 743 vc->vc_sw->con_init(vc, init); 744 if (!vc->vc_complement_mask) 745 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800; 746 vc->vc_s_complement_mask = vc->vc_complement_mask; 747 vc->vc_size_row = vc->vc_cols << 1; 748 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row; 749 } 750 751 int vc_allocate(unsigned int currcons) /* return 0 on success */ 752 { 753 WARN_CONSOLE_UNLOCKED(); 754 755 if (currcons >= MAX_NR_CONSOLES) 756 return -ENXIO; 757 if (!vc_cons[currcons].d) { 758 struct vc_data *vc; 759 struct vt_notifier_param param; 760 761 /* prevent users from taking too much memory */ 762 if (currcons >= MAX_NR_USER_CONSOLES && !capable(CAP_SYS_RESOURCE)) 763 return -EPERM; 764 765 /* due to the granularity of kmalloc, we waste some memory here */ 766 /* the alloc is done in two steps, to optimize the common situation 767 of a 25x80 console (structsize=216, screenbuf_size=4000) */ 768 /* although the numbers above are not valid since long ago, the 769 point is still up-to-date and the comment still has its value 770 even if only as a historical artifact. --mj, July 1998 */ 771 param.vc = vc = kzalloc(sizeof(struct vc_data), GFP_KERNEL); 772 if (!vc) 773 return -ENOMEM; 774 vc_cons[currcons].d = vc; 775 tty_port_init(&vc->port); 776 INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK); 777 visual_init(vc, currcons, 1); 778 if (!*vc->vc_uni_pagedir_loc) 779 con_set_default_unimap(vc); 780 vc->vc_screenbuf = kmalloc(vc->vc_screenbuf_size, GFP_KERNEL); 781 if (!vc->vc_screenbuf) { 782 kfree(vc); 783 vc_cons[currcons].d = NULL; 784 return -ENOMEM; 785 } 786 787 /* If no drivers have overridden us and the user didn't pass a 788 boot option, default to displaying the cursor */ 789 if (global_cursor_default == -1) 790 global_cursor_default = 1; 791 792 vc_init(vc, vc->vc_rows, vc->vc_cols, 1); 793 vcs_make_sysfs(currcons); 794 atomic_notifier_call_chain(&vt_notifier_list, VT_ALLOCATE, ¶m); 795 } 796 return 0; 797 } 798 799 static inline int resize_screen(struct vc_data *vc, int width, int height, 800 int user) 801 { 802 /* Resizes the resolution of the display adapater */ 803 int err = 0; 804 805 if (vc->vc_mode != KD_GRAPHICS && vc->vc_sw->con_resize) 806 err = vc->vc_sw->con_resize(vc, width, height, user); 807 808 return err; 809 } 810 811 /* 812 * Change # of rows and columns (0 means unchanged/the size of fg_console) 813 * [this is to be used together with some user program 814 * like resize that changes the hardware videomode] 815 */ 816 #define VC_RESIZE_MAXCOL (32767) 817 #define VC_RESIZE_MAXROW (32767) 818 819 /** 820 * vc_do_resize - resizing method for the tty 821 * @tty: tty being resized 822 * @real_tty: real tty (different to tty if a pty/tty pair) 823 * @vc: virtual console private data 824 * @cols: columns 825 * @lines: lines 826 * 827 * Resize a virtual console, clipping according to the actual constraints. 828 * If the caller passes a tty structure then update the termios winsize 829 * information and perform any necessary signal handling. 830 * 831 * Caller must hold the console semaphore. Takes the termios rwsem and 832 * ctrl_lock of the tty IFF a tty is passed. 833 */ 834 835 static int vc_do_resize(struct tty_struct *tty, struct vc_data *vc, 836 unsigned int cols, unsigned int lines) 837 { 838 unsigned long old_origin, new_origin, new_scr_end, rlth, rrem, err = 0; 839 unsigned long end; 840 unsigned int old_rows, old_row_size; 841 unsigned int new_cols, new_rows, new_row_size, new_screen_size; 842 unsigned int user; 843 unsigned short *newscreen; 844 845 WARN_CONSOLE_UNLOCKED(); 846 847 if (!vc) 848 return -ENXIO; 849 850 user = vc->vc_resize_user; 851 vc->vc_resize_user = 0; 852 853 if (cols > VC_RESIZE_MAXCOL || lines > VC_RESIZE_MAXROW) 854 return -EINVAL; 855 856 new_cols = (cols ? cols : vc->vc_cols); 857 new_rows = (lines ? lines : vc->vc_rows); 858 new_row_size = new_cols << 1; 859 new_screen_size = new_row_size * new_rows; 860 861 if (new_cols == vc->vc_cols && new_rows == vc->vc_rows) 862 return 0; 863 864 newscreen = kmalloc(new_screen_size, GFP_USER); 865 if (!newscreen) 866 return -ENOMEM; 867 868 old_rows = vc->vc_rows; 869 old_row_size = vc->vc_size_row; 870 871 err = resize_screen(vc, new_cols, new_rows, user); 872 if (err) { 873 kfree(newscreen); 874 return err; 875 } 876 877 vc->vc_rows = new_rows; 878 vc->vc_cols = new_cols; 879 vc->vc_size_row = new_row_size; 880 vc->vc_screenbuf_size = new_screen_size; 881 882 rlth = min(old_row_size, new_row_size); 883 rrem = new_row_size - rlth; 884 old_origin = vc->vc_origin; 885 new_origin = (long) newscreen; 886 new_scr_end = new_origin + new_screen_size; 887 888 if (vc->vc_y > new_rows) { 889 if (old_rows - vc->vc_y < new_rows) { 890 /* 891 * Cursor near the bottom, copy contents from the 892 * bottom of buffer 893 */ 894 old_origin += (old_rows - new_rows) * old_row_size; 895 } else { 896 /* 897 * Cursor is in no man's land, copy 1/2 screenful 898 * from the top and bottom of cursor position 899 */ 900 old_origin += (vc->vc_y - new_rows/2) * old_row_size; 901 } 902 } 903 904 end = old_origin + old_row_size * min(old_rows, new_rows); 905 906 update_attr(vc); 907 908 while (old_origin < end) { 909 scr_memcpyw((unsigned short *) new_origin, 910 (unsigned short *) old_origin, rlth); 911 if (rrem) 912 scr_memsetw((void *)(new_origin + rlth), 913 vc->vc_video_erase_char, rrem); 914 old_origin += old_row_size; 915 new_origin += new_row_size; 916 } 917 if (new_scr_end > new_origin) 918 scr_memsetw((void *)new_origin, vc->vc_video_erase_char, 919 new_scr_end - new_origin); 920 kfree(vc->vc_screenbuf); 921 vc->vc_screenbuf = newscreen; 922 vc->vc_screenbuf_size = new_screen_size; 923 set_origin(vc); 924 925 /* do part of a reset_terminal() */ 926 vc->vc_top = 0; 927 vc->vc_bottom = vc->vc_rows; 928 gotoxy(vc, vc->vc_x, vc->vc_y); 929 save_cur(vc); 930 931 if (tty) { 932 /* Rewrite the requested winsize data with the actual 933 resulting sizes */ 934 struct winsize ws; 935 memset(&ws, 0, sizeof(ws)); 936 ws.ws_row = vc->vc_rows; 937 ws.ws_col = vc->vc_cols; 938 ws.ws_ypixel = vc->vc_scan_lines; 939 tty_do_resize(tty, &ws); 940 } 941 942 if (CON_IS_VISIBLE(vc)) 943 update_screen(vc); 944 vt_event_post(VT_EVENT_RESIZE, vc->vc_num, vc->vc_num); 945 return err; 946 } 947 948 /** 949 * vc_resize - resize a VT 950 * @vc: virtual console 951 * @cols: columns 952 * @rows: rows 953 * 954 * Resize a virtual console as seen from the console end of things. We 955 * use the common vc_do_resize methods to update the structures. The 956 * caller must hold the console sem to protect console internals and 957 * vc->port.tty 958 */ 959 960 int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int rows) 961 { 962 return vc_do_resize(vc->port.tty, vc, cols, rows); 963 } 964 965 /** 966 * vt_resize - resize a VT 967 * @tty: tty to resize 968 * @ws: winsize attributes 969 * 970 * Resize a virtual terminal. This is called by the tty layer as we 971 * register our own handler for resizing. The mutual helper does all 972 * the actual work. 973 * 974 * Takes the console sem and the called methods then take the tty 975 * termios_rwsem and the tty ctrl_lock in that order. 976 */ 977 static int vt_resize(struct tty_struct *tty, struct winsize *ws) 978 { 979 struct vc_data *vc = tty->driver_data; 980 int ret; 981 982 console_lock(); 983 ret = vc_do_resize(tty, vc, ws->ws_col, ws->ws_row); 984 console_unlock(); 985 return ret; 986 } 987 988 struct vc_data *vc_deallocate(unsigned int currcons) 989 { 990 struct vc_data *vc = NULL; 991 992 WARN_CONSOLE_UNLOCKED(); 993 994 if (vc_cons_allocated(currcons)) { 995 struct vt_notifier_param param; 996 997 param.vc = vc = vc_cons[currcons].d; 998 atomic_notifier_call_chain(&vt_notifier_list, VT_DEALLOCATE, ¶m); 999 vcs_remove_sysfs(currcons); 1000 vc->vc_sw->con_deinit(vc); 1001 put_pid(vc->vt_pid); 1002 module_put(vc->vc_sw->owner); 1003 kfree(vc->vc_screenbuf); 1004 vc_cons[currcons].d = NULL; 1005 } 1006 return vc; 1007 } 1008 1009 /* 1010 * VT102 emulator 1011 */ 1012 1013 #define set_kbd(vc, x) vt_set_kbd_mode_bit((vc)->vc_num, (x)) 1014 #define clr_kbd(vc, x) vt_clr_kbd_mode_bit((vc)->vc_num, (x)) 1015 #define is_kbd(vc, x) vt_get_kbd_mode_bit((vc)->vc_num, (x)) 1016 1017 #define decarm VC_REPEAT 1018 #define decckm VC_CKMODE 1019 #define kbdapplic VC_APPLIC 1020 #define lnm VC_CRLF 1021 1022 /* 1023 * this is what the terminal answers to a ESC-Z or csi0c query. 1024 */ 1025 #define VT100ID "\033[?1;2c" 1026 #define VT102ID "\033[?6c" 1027 1028 unsigned char color_table[] = { 0, 4, 2, 6, 1, 5, 3, 7, 1029 8,12,10,14, 9,13,11,15 }; 1030 1031 /* the default colour table, for VGA+ colour systems */ 1032 int default_red[] = {0x00,0xaa,0x00,0xaa,0x00,0xaa,0x00,0xaa, 1033 0x55,0xff,0x55,0xff,0x55,0xff,0x55,0xff}; 1034 int default_grn[] = {0x00,0x00,0xaa,0x55,0x00,0x00,0xaa,0xaa, 1035 0x55,0x55,0xff,0xff,0x55,0x55,0xff,0xff}; 1036 int default_blu[] = {0x00,0x00,0x00,0x00,0xaa,0xaa,0xaa,0xaa, 1037 0x55,0x55,0x55,0x55,0xff,0xff,0xff,0xff}; 1038 1039 module_param_array(default_red, int, NULL, S_IRUGO | S_IWUSR); 1040 module_param_array(default_grn, int, NULL, S_IRUGO | S_IWUSR); 1041 module_param_array(default_blu, int, NULL, S_IRUGO | S_IWUSR); 1042 1043 /* 1044 * gotoxy() must verify all boundaries, because the arguments 1045 * might also be negative. If the given position is out of 1046 * bounds, the cursor is placed at the nearest margin. 1047 */ 1048 static void gotoxy(struct vc_data *vc, int new_x, int new_y) 1049 { 1050 int min_y, max_y; 1051 1052 if (new_x < 0) 1053 vc->vc_x = 0; 1054 else { 1055 if (new_x >= vc->vc_cols) 1056 vc->vc_x = vc->vc_cols - 1; 1057 else 1058 vc->vc_x = new_x; 1059 } 1060 1061 if (vc->vc_decom) { 1062 min_y = vc->vc_top; 1063 max_y = vc->vc_bottom; 1064 } else { 1065 min_y = 0; 1066 max_y = vc->vc_rows; 1067 } 1068 if (new_y < min_y) 1069 vc->vc_y = min_y; 1070 else if (new_y >= max_y) 1071 vc->vc_y = max_y - 1; 1072 else 1073 vc->vc_y = new_y; 1074 vc->vc_pos = vc->vc_origin + vc->vc_y * vc->vc_size_row + (vc->vc_x<<1); 1075 vc->vc_need_wrap = 0; 1076 } 1077 1078 /* for absolute user moves, when decom is set */ 1079 static void gotoxay(struct vc_data *vc, int new_x, int new_y) 1080 { 1081 gotoxy(vc, new_x, vc->vc_decom ? (vc->vc_top + new_y) : new_y); 1082 } 1083 1084 void scrollback(struct vc_data *vc, int lines) 1085 { 1086 if (!lines) 1087 lines = vc->vc_rows / 2; 1088 scrolldelta(-lines); 1089 } 1090 1091 void scrollfront(struct vc_data *vc, int lines) 1092 { 1093 if (!lines) 1094 lines = vc->vc_rows / 2; 1095 scrolldelta(lines); 1096 } 1097 1098 static void lf(struct vc_data *vc) 1099 { 1100 /* don't scroll if above bottom of scrolling region, or 1101 * if below scrolling region 1102 */ 1103 if (vc->vc_y + 1 == vc->vc_bottom) 1104 scrup(vc, vc->vc_top, vc->vc_bottom, 1); 1105 else if (vc->vc_y < vc->vc_rows - 1) { 1106 vc->vc_y++; 1107 vc->vc_pos += vc->vc_size_row; 1108 } 1109 vc->vc_need_wrap = 0; 1110 notify_write(vc, '\n'); 1111 } 1112 1113 static void ri(struct vc_data *vc) 1114 { 1115 /* don't scroll if below top of scrolling region, or 1116 * if above scrolling region 1117 */ 1118 if (vc->vc_y == vc->vc_top) 1119 scrdown(vc, vc->vc_top, vc->vc_bottom, 1); 1120 else if (vc->vc_y > 0) { 1121 vc->vc_y--; 1122 vc->vc_pos -= vc->vc_size_row; 1123 } 1124 vc->vc_need_wrap = 0; 1125 } 1126 1127 static inline void cr(struct vc_data *vc) 1128 { 1129 vc->vc_pos -= vc->vc_x << 1; 1130 vc->vc_need_wrap = vc->vc_x = 0; 1131 notify_write(vc, '\r'); 1132 } 1133 1134 static inline void bs(struct vc_data *vc) 1135 { 1136 if (vc->vc_x) { 1137 vc->vc_pos -= 2; 1138 vc->vc_x--; 1139 vc->vc_need_wrap = 0; 1140 notify_write(vc, '\b'); 1141 } 1142 } 1143 1144 static inline void del(struct vc_data *vc) 1145 { 1146 /* ignored */ 1147 } 1148 1149 static void csi_J(struct vc_data *vc, int vpar) 1150 { 1151 unsigned int count; 1152 unsigned short * start; 1153 1154 switch (vpar) { 1155 case 0: /* erase from cursor to end of display */ 1156 count = (vc->vc_scr_end - vc->vc_pos) >> 1; 1157 start = (unsigned short *)vc->vc_pos; 1158 break; 1159 case 1: /* erase from start to cursor */ 1160 count = ((vc->vc_pos - vc->vc_origin) >> 1) + 1; 1161 start = (unsigned short *)vc->vc_origin; 1162 break; 1163 case 3: /* erase scroll-back buffer (and whole display) */ 1164 scr_memsetw(vc->vc_screenbuf, vc->vc_video_erase_char, 1165 vc->vc_screenbuf_size >> 1); 1166 set_origin(vc); 1167 if (CON_IS_VISIBLE(vc)) 1168 update_screen(vc); 1169 /* fall through */ 1170 case 2: /* erase whole display */ 1171 count = vc->vc_cols * vc->vc_rows; 1172 start = (unsigned short *)vc->vc_origin; 1173 break; 1174 default: 1175 return; 1176 } 1177 scr_memsetw(start, vc->vc_video_erase_char, 2 * count); 1178 if (DO_UPDATE(vc)) 1179 do_update_region(vc, (unsigned long) start, count); 1180 vc->vc_need_wrap = 0; 1181 } 1182 1183 static void csi_K(struct vc_data *vc, int vpar) 1184 { 1185 unsigned int count; 1186 unsigned short * start; 1187 1188 switch (vpar) { 1189 case 0: /* erase from cursor to end of line */ 1190 count = vc->vc_cols - vc->vc_x; 1191 start = (unsigned short *)vc->vc_pos; 1192 break; 1193 case 1: /* erase from start of line to cursor */ 1194 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1)); 1195 count = vc->vc_x + 1; 1196 break; 1197 case 2: /* erase whole line */ 1198 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1)); 1199 count = vc->vc_cols; 1200 break; 1201 default: 1202 return; 1203 } 1204 scr_memsetw(start, vc->vc_video_erase_char, 2 * count); 1205 vc->vc_need_wrap = 0; 1206 if (DO_UPDATE(vc)) 1207 do_update_region(vc, (unsigned long) start, count); 1208 } 1209 1210 static void csi_X(struct vc_data *vc, int vpar) /* erase the following vpar positions */ 1211 { /* not vt100? */ 1212 int count; 1213 1214 if (!vpar) 1215 vpar++; 1216 count = (vpar > vc->vc_cols - vc->vc_x) ? (vc->vc_cols - vc->vc_x) : vpar; 1217 1218 scr_memsetw((unsigned short *)vc->vc_pos, vc->vc_video_erase_char, 2 * count); 1219 if (DO_UPDATE(vc)) 1220 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, count); 1221 vc->vc_need_wrap = 0; 1222 } 1223 1224 static void default_attr(struct vc_data *vc) 1225 { 1226 vc->vc_intensity = 1; 1227 vc->vc_italic = 0; 1228 vc->vc_underline = 0; 1229 vc->vc_reverse = 0; 1230 vc->vc_blink = 0; 1231 vc->vc_color = vc->vc_def_color; 1232 } 1233 1234 /* console_lock is held */ 1235 static void csi_m(struct vc_data *vc) 1236 { 1237 int i; 1238 1239 for (i = 0; i <= vc->vc_npar; i++) 1240 switch (vc->vc_par[i]) { 1241 case 0: /* all attributes off */ 1242 default_attr(vc); 1243 break; 1244 case 1: 1245 vc->vc_intensity = 2; 1246 break; 1247 case 2: 1248 vc->vc_intensity = 0; 1249 break; 1250 case 3: 1251 vc->vc_italic = 1; 1252 break; 1253 case 4: 1254 vc->vc_underline = 1; 1255 break; 1256 case 5: 1257 vc->vc_blink = 1; 1258 break; 1259 case 7: 1260 vc->vc_reverse = 1; 1261 break; 1262 case 10: /* ANSI X3.64-1979 (SCO-ish?) 1263 * Select primary font, don't display 1264 * control chars if defined, don't set 1265 * bit 8 on output. 1266 */ 1267 vc->vc_translate = set_translate(vc->vc_charset == 0 1268 ? vc->vc_G0_charset 1269 : vc->vc_G1_charset, vc); 1270 vc->vc_disp_ctrl = 0; 1271 vc->vc_toggle_meta = 0; 1272 break; 1273 case 11: /* ANSI X3.64-1979 (SCO-ish?) 1274 * Select first alternate font, lets 1275 * chars < 32 be displayed as ROM chars. 1276 */ 1277 vc->vc_translate = set_translate(IBMPC_MAP, vc); 1278 vc->vc_disp_ctrl = 1; 1279 vc->vc_toggle_meta = 0; 1280 break; 1281 case 12: /* ANSI X3.64-1979 (SCO-ish?) 1282 * Select second alternate font, toggle 1283 * high bit before displaying as ROM char. 1284 */ 1285 vc->vc_translate = set_translate(IBMPC_MAP, vc); 1286 vc->vc_disp_ctrl = 1; 1287 vc->vc_toggle_meta = 1; 1288 break; 1289 case 21: 1290 case 22: 1291 vc->vc_intensity = 1; 1292 break; 1293 case 23: 1294 vc->vc_italic = 0; 1295 break; 1296 case 24: 1297 vc->vc_underline = 0; 1298 break; 1299 case 25: 1300 vc->vc_blink = 0; 1301 break; 1302 case 27: 1303 vc->vc_reverse = 0; 1304 break; 1305 case 38: 1306 case 48: /* ITU T.416 1307 * Higher colour modes. 1308 * They break the usual properties of SGR codes 1309 * and thus need to be detected and ignored by 1310 * hand. Strictly speaking, that standard also 1311 * wants : rather than ; as separators, contrary 1312 * to ECMA-48, but no one produces such codes 1313 * and almost no one accepts them. 1314 */ 1315 i++; 1316 if (i > vc->vc_npar) 1317 break; 1318 if (vc->vc_par[i] == 5) /* 256 colours */ 1319 i++; /* ubiquitous */ 1320 else if (vc->vc_par[i] == 2) /* 24 bit colours */ 1321 i += 3; /* extremely rare */ 1322 /* Subcommands 3 (CMY) and 4 (CMYK) are so insane 1323 * that detecting them is not worth the few extra 1324 * bytes of kernel's size. 1325 */ 1326 break; 1327 case 39: 1328 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0); 1329 break; 1330 case 49: 1331 vc->vc_color = (vc->vc_def_color & 0xf0) | (vc->vc_color & 0x0f); 1332 break; 1333 default: 1334 if (vc->vc_par[i] >= 30 && vc->vc_par[i] <= 37) 1335 vc->vc_color = color_table[vc->vc_par[i] - 30] 1336 | (vc->vc_color & 0xf0); 1337 else if (vc->vc_par[i] >= 40 && vc->vc_par[i] <= 47) 1338 vc->vc_color = (color_table[vc->vc_par[i] - 40] << 4) 1339 | (vc->vc_color & 0x0f); 1340 break; 1341 } 1342 update_attr(vc); 1343 } 1344 1345 static void respond_string(const char *p, struct tty_port *port) 1346 { 1347 while (*p) { 1348 tty_insert_flip_char(port, *p, 0); 1349 p++; 1350 } 1351 tty_schedule_flip(port); 1352 } 1353 1354 static void cursor_report(struct vc_data *vc, struct tty_struct *tty) 1355 { 1356 char buf[40]; 1357 1358 sprintf(buf, "\033[%d;%dR", vc->vc_y + (vc->vc_decom ? vc->vc_top + 1 : 1), vc->vc_x + 1); 1359 respond_string(buf, tty->port); 1360 } 1361 1362 static inline void status_report(struct tty_struct *tty) 1363 { 1364 respond_string("\033[0n", tty->port); /* Terminal ok */ 1365 } 1366 1367 static inline void respond_ID(struct tty_struct *tty) 1368 { 1369 respond_string(VT102ID, tty->port); 1370 } 1371 1372 void mouse_report(struct tty_struct *tty, int butt, int mrx, int mry) 1373 { 1374 char buf[8]; 1375 1376 sprintf(buf, "\033[M%c%c%c", (char)(' ' + butt), (char)('!' + mrx), 1377 (char)('!' + mry)); 1378 respond_string(buf, tty->port); 1379 } 1380 1381 /* invoked via ioctl(TIOCLINUX) and through set_selection */ 1382 int mouse_reporting(void) 1383 { 1384 return vc_cons[fg_console].d->vc_report_mouse; 1385 } 1386 1387 /* console_lock is held */ 1388 static void set_mode(struct vc_data *vc, int on_off) 1389 { 1390 int i; 1391 1392 for (i = 0; i <= vc->vc_npar; i++) 1393 if (vc->vc_ques) { 1394 switch(vc->vc_par[i]) { /* DEC private modes set/reset */ 1395 case 1: /* Cursor keys send ^[Ox/^[[x */ 1396 if (on_off) 1397 set_kbd(vc, decckm); 1398 else 1399 clr_kbd(vc, decckm); 1400 break; 1401 case 3: /* 80/132 mode switch unimplemented */ 1402 vc->vc_deccolm = on_off; 1403 #if 0 1404 vc_resize(deccolm ? 132 : 80, vc->vc_rows); 1405 /* this alone does not suffice; some user mode 1406 utility has to change the hardware regs */ 1407 #endif 1408 break; 1409 case 5: /* Inverted screen on/off */ 1410 if (vc->vc_decscnm != on_off) { 1411 vc->vc_decscnm = on_off; 1412 invert_screen(vc, 0, vc->vc_screenbuf_size, 0); 1413 update_attr(vc); 1414 } 1415 break; 1416 case 6: /* Origin relative/absolute */ 1417 vc->vc_decom = on_off; 1418 gotoxay(vc, 0, 0); 1419 break; 1420 case 7: /* Autowrap on/off */ 1421 vc->vc_decawm = on_off; 1422 break; 1423 case 8: /* Autorepeat on/off */ 1424 if (on_off) 1425 set_kbd(vc, decarm); 1426 else 1427 clr_kbd(vc, decarm); 1428 break; 1429 case 9: 1430 vc->vc_report_mouse = on_off ? 1 : 0; 1431 break; 1432 case 25: /* Cursor on/off */ 1433 vc->vc_deccm = on_off; 1434 break; 1435 case 1000: 1436 vc->vc_report_mouse = on_off ? 2 : 0; 1437 break; 1438 } 1439 } else { 1440 switch(vc->vc_par[i]) { /* ANSI modes set/reset */ 1441 case 3: /* Monitor (display ctrls) */ 1442 vc->vc_disp_ctrl = on_off; 1443 break; 1444 case 4: /* Insert Mode on/off */ 1445 vc->vc_decim = on_off; 1446 break; 1447 case 20: /* Lf, Enter == CrLf/Lf */ 1448 if (on_off) 1449 set_kbd(vc, lnm); 1450 else 1451 clr_kbd(vc, lnm); 1452 break; 1453 } 1454 } 1455 } 1456 1457 /* console_lock is held */ 1458 static void setterm_command(struct vc_data *vc) 1459 { 1460 switch(vc->vc_par[0]) { 1461 case 1: /* set color for underline mode */ 1462 if (vc->vc_can_do_color && 1463 vc->vc_par[1] < 16) { 1464 vc->vc_ulcolor = color_table[vc->vc_par[1]]; 1465 if (vc->vc_underline) 1466 update_attr(vc); 1467 } 1468 break; 1469 case 2: /* set color for half intensity mode */ 1470 if (vc->vc_can_do_color && 1471 vc->vc_par[1] < 16) { 1472 vc->vc_halfcolor = color_table[vc->vc_par[1]]; 1473 if (vc->vc_intensity == 0) 1474 update_attr(vc); 1475 } 1476 break; 1477 case 8: /* store colors as defaults */ 1478 vc->vc_def_color = vc->vc_attr; 1479 if (vc->vc_hi_font_mask == 0x100) 1480 vc->vc_def_color >>= 1; 1481 default_attr(vc); 1482 update_attr(vc); 1483 break; 1484 case 9: /* set blanking interval */ 1485 blankinterval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60; 1486 poke_blanked_console(); 1487 break; 1488 case 10: /* set bell frequency in Hz */ 1489 if (vc->vc_npar >= 1) 1490 vc->vc_bell_pitch = vc->vc_par[1]; 1491 else 1492 vc->vc_bell_pitch = DEFAULT_BELL_PITCH; 1493 break; 1494 case 11: /* set bell duration in msec */ 1495 if (vc->vc_npar >= 1) 1496 vc->vc_bell_duration = (vc->vc_par[1] < 2000) ? 1497 vc->vc_par[1] * HZ / 1000 : 0; 1498 else 1499 vc->vc_bell_duration = DEFAULT_BELL_DURATION; 1500 break; 1501 case 12: /* bring specified console to the front */ 1502 if (vc->vc_par[1] >= 1 && vc_cons_allocated(vc->vc_par[1] - 1)) 1503 set_console(vc->vc_par[1] - 1); 1504 break; 1505 case 13: /* unblank the screen */ 1506 poke_blanked_console(); 1507 break; 1508 case 14: /* set vesa powerdown interval */ 1509 vesa_off_interval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ; 1510 break; 1511 case 15: /* activate the previous console */ 1512 set_console(last_console); 1513 break; 1514 } 1515 } 1516 1517 /* console_lock is held */ 1518 static void csi_at(struct vc_data *vc, unsigned int nr) 1519 { 1520 if (nr > vc->vc_cols - vc->vc_x) 1521 nr = vc->vc_cols - vc->vc_x; 1522 else if (!nr) 1523 nr = 1; 1524 insert_char(vc, nr); 1525 } 1526 1527 /* console_lock is held */ 1528 static void csi_L(struct vc_data *vc, unsigned int nr) 1529 { 1530 if (nr > vc->vc_rows - vc->vc_y) 1531 nr = vc->vc_rows - vc->vc_y; 1532 else if (!nr) 1533 nr = 1; 1534 scrdown(vc, vc->vc_y, vc->vc_bottom, nr); 1535 vc->vc_need_wrap = 0; 1536 } 1537 1538 /* console_lock is held */ 1539 static void csi_P(struct vc_data *vc, unsigned int nr) 1540 { 1541 if (nr > vc->vc_cols - vc->vc_x) 1542 nr = vc->vc_cols - vc->vc_x; 1543 else if (!nr) 1544 nr = 1; 1545 delete_char(vc, nr); 1546 } 1547 1548 /* console_lock is held */ 1549 static void csi_M(struct vc_data *vc, unsigned int nr) 1550 { 1551 if (nr > vc->vc_rows - vc->vc_y) 1552 nr = vc->vc_rows - vc->vc_y; 1553 else if (!nr) 1554 nr=1; 1555 scrup(vc, vc->vc_y, vc->vc_bottom, nr); 1556 vc->vc_need_wrap = 0; 1557 } 1558 1559 /* console_lock is held (except via vc_init->reset_terminal */ 1560 static void save_cur(struct vc_data *vc) 1561 { 1562 vc->vc_saved_x = vc->vc_x; 1563 vc->vc_saved_y = vc->vc_y; 1564 vc->vc_s_intensity = vc->vc_intensity; 1565 vc->vc_s_italic = vc->vc_italic; 1566 vc->vc_s_underline = vc->vc_underline; 1567 vc->vc_s_blink = vc->vc_blink; 1568 vc->vc_s_reverse = vc->vc_reverse; 1569 vc->vc_s_charset = vc->vc_charset; 1570 vc->vc_s_color = vc->vc_color; 1571 vc->vc_saved_G0 = vc->vc_G0_charset; 1572 vc->vc_saved_G1 = vc->vc_G1_charset; 1573 } 1574 1575 /* console_lock is held */ 1576 static void restore_cur(struct vc_data *vc) 1577 { 1578 gotoxy(vc, vc->vc_saved_x, vc->vc_saved_y); 1579 vc->vc_intensity = vc->vc_s_intensity; 1580 vc->vc_italic = vc->vc_s_italic; 1581 vc->vc_underline = vc->vc_s_underline; 1582 vc->vc_blink = vc->vc_s_blink; 1583 vc->vc_reverse = vc->vc_s_reverse; 1584 vc->vc_charset = vc->vc_s_charset; 1585 vc->vc_color = vc->vc_s_color; 1586 vc->vc_G0_charset = vc->vc_saved_G0; 1587 vc->vc_G1_charset = vc->vc_saved_G1; 1588 vc->vc_translate = set_translate(vc->vc_charset ? vc->vc_G1_charset : vc->vc_G0_charset, vc); 1589 update_attr(vc); 1590 vc->vc_need_wrap = 0; 1591 } 1592 1593 enum { ESnormal, ESesc, ESsquare, ESgetpars, ESgotpars, ESfunckey, 1594 EShash, ESsetG0, ESsetG1, ESpercent, ESignore, ESnonstd, 1595 ESpalette }; 1596 1597 /* console_lock is held (except via vc_init()) */ 1598 static void reset_terminal(struct vc_data *vc, int do_clear) 1599 { 1600 vc->vc_top = 0; 1601 vc->vc_bottom = vc->vc_rows; 1602 vc->vc_state = ESnormal; 1603 vc->vc_ques = 0; 1604 vc->vc_translate = set_translate(LAT1_MAP, vc); 1605 vc->vc_G0_charset = LAT1_MAP; 1606 vc->vc_G1_charset = GRAF_MAP; 1607 vc->vc_charset = 0; 1608 vc->vc_need_wrap = 0; 1609 vc->vc_report_mouse = 0; 1610 vc->vc_utf = default_utf8; 1611 vc->vc_utf_count = 0; 1612 1613 vc->vc_disp_ctrl = 0; 1614 vc->vc_toggle_meta = 0; 1615 1616 vc->vc_decscnm = 0; 1617 vc->vc_decom = 0; 1618 vc->vc_decawm = 1; 1619 vc->vc_deccm = global_cursor_default; 1620 vc->vc_decim = 0; 1621 1622 vt_reset_keyboard(vc->vc_num); 1623 1624 vc->vc_cursor_type = cur_default; 1625 vc->vc_complement_mask = vc->vc_s_complement_mask; 1626 1627 default_attr(vc); 1628 update_attr(vc); 1629 1630 vc->vc_tab_stop[0] = 0x01010100; 1631 vc->vc_tab_stop[1] = 1632 vc->vc_tab_stop[2] = 1633 vc->vc_tab_stop[3] = 1634 vc->vc_tab_stop[4] = 1635 vc->vc_tab_stop[5] = 1636 vc->vc_tab_stop[6] = 1637 vc->vc_tab_stop[7] = 0x01010101; 1638 1639 vc->vc_bell_pitch = DEFAULT_BELL_PITCH; 1640 vc->vc_bell_duration = DEFAULT_BELL_DURATION; 1641 1642 gotoxy(vc, 0, 0); 1643 save_cur(vc); 1644 if (do_clear) 1645 csi_J(vc, 2); 1646 } 1647 1648 /* console_lock is held */ 1649 static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c) 1650 { 1651 /* 1652 * Control characters can be used in the _middle_ 1653 * of an escape sequence. 1654 */ 1655 switch (c) { 1656 case 0: 1657 return; 1658 case 7: 1659 if (vc->vc_bell_duration) 1660 kd_mksound(vc->vc_bell_pitch, vc->vc_bell_duration); 1661 return; 1662 case 8: 1663 bs(vc); 1664 return; 1665 case 9: 1666 vc->vc_pos -= (vc->vc_x << 1); 1667 while (vc->vc_x < vc->vc_cols - 1) { 1668 vc->vc_x++; 1669 if (vc->vc_tab_stop[vc->vc_x >> 5] & (1 << (vc->vc_x & 31))) 1670 break; 1671 } 1672 vc->vc_pos += (vc->vc_x << 1); 1673 notify_write(vc, '\t'); 1674 return; 1675 case 10: case 11: case 12: 1676 lf(vc); 1677 if (!is_kbd(vc, lnm)) 1678 return; 1679 case 13: 1680 cr(vc); 1681 return; 1682 case 14: 1683 vc->vc_charset = 1; 1684 vc->vc_translate = set_translate(vc->vc_G1_charset, vc); 1685 vc->vc_disp_ctrl = 1; 1686 return; 1687 case 15: 1688 vc->vc_charset = 0; 1689 vc->vc_translate = set_translate(vc->vc_G0_charset, vc); 1690 vc->vc_disp_ctrl = 0; 1691 return; 1692 case 24: case 26: 1693 vc->vc_state = ESnormal; 1694 return; 1695 case 27: 1696 vc->vc_state = ESesc; 1697 return; 1698 case 127: 1699 del(vc); 1700 return; 1701 case 128+27: 1702 vc->vc_state = ESsquare; 1703 return; 1704 } 1705 switch(vc->vc_state) { 1706 case ESesc: 1707 vc->vc_state = ESnormal; 1708 switch (c) { 1709 case '[': 1710 vc->vc_state = ESsquare; 1711 return; 1712 case ']': 1713 vc->vc_state = ESnonstd; 1714 return; 1715 case '%': 1716 vc->vc_state = ESpercent; 1717 return; 1718 case 'E': 1719 cr(vc); 1720 lf(vc); 1721 return; 1722 case 'M': 1723 ri(vc); 1724 return; 1725 case 'D': 1726 lf(vc); 1727 return; 1728 case 'H': 1729 vc->vc_tab_stop[vc->vc_x >> 5] |= (1 << (vc->vc_x & 31)); 1730 return; 1731 case 'Z': 1732 respond_ID(tty); 1733 return; 1734 case '7': 1735 save_cur(vc); 1736 return; 1737 case '8': 1738 restore_cur(vc); 1739 return; 1740 case '(': 1741 vc->vc_state = ESsetG0; 1742 return; 1743 case ')': 1744 vc->vc_state = ESsetG1; 1745 return; 1746 case '#': 1747 vc->vc_state = EShash; 1748 return; 1749 case 'c': 1750 reset_terminal(vc, 1); 1751 return; 1752 case '>': /* Numeric keypad */ 1753 clr_kbd(vc, kbdapplic); 1754 return; 1755 case '=': /* Appl. keypad */ 1756 set_kbd(vc, kbdapplic); 1757 return; 1758 } 1759 return; 1760 case ESnonstd: 1761 if (c=='P') { /* palette escape sequence */ 1762 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++) 1763 vc->vc_par[vc->vc_npar] = 0; 1764 vc->vc_npar = 0; 1765 vc->vc_state = ESpalette; 1766 return; 1767 } else if (c=='R') { /* reset palette */ 1768 reset_palette(vc); 1769 vc->vc_state = ESnormal; 1770 } else 1771 vc->vc_state = ESnormal; 1772 return; 1773 case ESpalette: 1774 if (isxdigit(c)) { 1775 vc->vc_par[vc->vc_npar++] = hex_to_bin(c); 1776 if (vc->vc_npar == 7) { 1777 int i = vc->vc_par[0] * 3, j = 1; 1778 vc->vc_palette[i] = 16 * vc->vc_par[j++]; 1779 vc->vc_palette[i++] += vc->vc_par[j++]; 1780 vc->vc_palette[i] = 16 * vc->vc_par[j++]; 1781 vc->vc_palette[i++] += vc->vc_par[j++]; 1782 vc->vc_palette[i] = 16 * vc->vc_par[j++]; 1783 vc->vc_palette[i] += vc->vc_par[j]; 1784 set_palette(vc); 1785 vc->vc_state = ESnormal; 1786 } 1787 } else 1788 vc->vc_state = ESnormal; 1789 return; 1790 case ESsquare: 1791 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++) 1792 vc->vc_par[vc->vc_npar] = 0; 1793 vc->vc_npar = 0; 1794 vc->vc_state = ESgetpars; 1795 if (c == '[') { /* Function key */ 1796 vc->vc_state=ESfunckey; 1797 return; 1798 } 1799 vc->vc_ques = (c == '?'); 1800 if (vc->vc_ques) 1801 return; 1802 case ESgetpars: 1803 if (c == ';' && vc->vc_npar < NPAR - 1) { 1804 vc->vc_npar++; 1805 return; 1806 } else if (c>='0' && c<='9') { 1807 vc->vc_par[vc->vc_npar] *= 10; 1808 vc->vc_par[vc->vc_npar] += c - '0'; 1809 return; 1810 } else 1811 vc->vc_state = ESgotpars; 1812 case ESgotpars: 1813 vc->vc_state = ESnormal; 1814 switch(c) { 1815 case 'h': 1816 set_mode(vc, 1); 1817 return; 1818 case 'l': 1819 set_mode(vc, 0); 1820 return; 1821 case 'c': 1822 if (vc->vc_ques) { 1823 if (vc->vc_par[0]) 1824 vc->vc_cursor_type = vc->vc_par[0] | (vc->vc_par[1] << 8) | (vc->vc_par[2] << 16); 1825 else 1826 vc->vc_cursor_type = cur_default; 1827 return; 1828 } 1829 break; 1830 case 'm': 1831 if (vc->vc_ques) { 1832 clear_selection(); 1833 if (vc->vc_par[0]) 1834 vc->vc_complement_mask = vc->vc_par[0] << 8 | vc->vc_par[1]; 1835 else 1836 vc->vc_complement_mask = vc->vc_s_complement_mask; 1837 return; 1838 } 1839 break; 1840 case 'n': 1841 if (!vc->vc_ques) { 1842 if (vc->vc_par[0] == 5) 1843 status_report(tty); 1844 else if (vc->vc_par[0] == 6) 1845 cursor_report(vc, tty); 1846 } 1847 return; 1848 } 1849 if (vc->vc_ques) { 1850 vc->vc_ques = 0; 1851 return; 1852 } 1853 switch(c) { 1854 case 'G': case '`': 1855 if (vc->vc_par[0]) 1856 vc->vc_par[0]--; 1857 gotoxy(vc, vc->vc_par[0], vc->vc_y); 1858 return; 1859 case 'A': 1860 if (!vc->vc_par[0]) 1861 vc->vc_par[0]++; 1862 gotoxy(vc, vc->vc_x, vc->vc_y - vc->vc_par[0]); 1863 return; 1864 case 'B': case 'e': 1865 if (!vc->vc_par[0]) 1866 vc->vc_par[0]++; 1867 gotoxy(vc, vc->vc_x, vc->vc_y + vc->vc_par[0]); 1868 return; 1869 case 'C': case 'a': 1870 if (!vc->vc_par[0]) 1871 vc->vc_par[0]++; 1872 gotoxy(vc, vc->vc_x + vc->vc_par[0], vc->vc_y); 1873 return; 1874 case 'D': 1875 if (!vc->vc_par[0]) 1876 vc->vc_par[0]++; 1877 gotoxy(vc, vc->vc_x - vc->vc_par[0], vc->vc_y); 1878 return; 1879 case 'E': 1880 if (!vc->vc_par[0]) 1881 vc->vc_par[0]++; 1882 gotoxy(vc, 0, vc->vc_y + vc->vc_par[0]); 1883 return; 1884 case 'F': 1885 if (!vc->vc_par[0]) 1886 vc->vc_par[0]++; 1887 gotoxy(vc, 0, vc->vc_y - vc->vc_par[0]); 1888 return; 1889 case 'd': 1890 if (vc->vc_par[0]) 1891 vc->vc_par[0]--; 1892 gotoxay(vc, vc->vc_x ,vc->vc_par[0]); 1893 return; 1894 case 'H': case 'f': 1895 if (vc->vc_par[0]) 1896 vc->vc_par[0]--; 1897 if (vc->vc_par[1]) 1898 vc->vc_par[1]--; 1899 gotoxay(vc, vc->vc_par[1], vc->vc_par[0]); 1900 return; 1901 case 'J': 1902 csi_J(vc, vc->vc_par[0]); 1903 return; 1904 case 'K': 1905 csi_K(vc, vc->vc_par[0]); 1906 return; 1907 case 'L': 1908 csi_L(vc, vc->vc_par[0]); 1909 return; 1910 case 'M': 1911 csi_M(vc, vc->vc_par[0]); 1912 return; 1913 case 'P': 1914 csi_P(vc, vc->vc_par[0]); 1915 return; 1916 case 'c': 1917 if (!vc->vc_par[0]) 1918 respond_ID(tty); 1919 return; 1920 case 'g': 1921 if (!vc->vc_par[0]) 1922 vc->vc_tab_stop[vc->vc_x >> 5] &= ~(1 << (vc->vc_x & 31)); 1923 else if (vc->vc_par[0] == 3) { 1924 vc->vc_tab_stop[0] = 1925 vc->vc_tab_stop[1] = 1926 vc->vc_tab_stop[2] = 1927 vc->vc_tab_stop[3] = 1928 vc->vc_tab_stop[4] = 1929 vc->vc_tab_stop[5] = 1930 vc->vc_tab_stop[6] = 1931 vc->vc_tab_stop[7] = 0; 1932 } 1933 return; 1934 case 'm': 1935 csi_m(vc); 1936 return; 1937 case 'q': /* DECLL - but only 3 leds */ 1938 /* map 0,1,2,3 to 0,1,2,4 */ 1939 if (vc->vc_par[0] < 4) 1940 vt_set_led_state(vc->vc_num, 1941 (vc->vc_par[0] < 3) ? vc->vc_par[0] : 4); 1942 return; 1943 case 'r': 1944 if (!vc->vc_par[0]) 1945 vc->vc_par[0]++; 1946 if (!vc->vc_par[1]) 1947 vc->vc_par[1] = vc->vc_rows; 1948 /* Minimum allowed region is 2 lines */ 1949 if (vc->vc_par[0] < vc->vc_par[1] && 1950 vc->vc_par[1] <= vc->vc_rows) { 1951 vc->vc_top = vc->vc_par[0] - 1; 1952 vc->vc_bottom = vc->vc_par[1]; 1953 gotoxay(vc, 0, 0); 1954 } 1955 return; 1956 case 's': 1957 save_cur(vc); 1958 return; 1959 case 'u': 1960 restore_cur(vc); 1961 return; 1962 case 'X': 1963 csi_X(vc, vc->vc_par[0]); 1964 return; 1965 case '@': 1966 csi_at(vc, vc->vc_par[0]); 1967 return; 1968 case ']': /* setterm functions */ 1969 setterm_command(vc); 1970 return; 1971 } 1972 return; 1973 case ESpercent: 1974 vc->vc_state = ESnormal; 1975 switch (c) { 1976 case '@': /* defined in ISO 2022 */ 1977 vc->vc_utf = 0; 1978 return; 1979 case 'G': /* prelim official escape code */ 1980 case '8': /* retained for compatibility */ 1981 vc->vc_utf = 1; 1982 return; 1983 } 1984 return; 1985 case ESfunckey: 1986 vc->vc_state = ESnormal; 1987 return; 1988 case EShash: 1989 vc->vc_state = ESnormal; 1990 if (c == '8') { 1991 /* DEC screen alignment test. kludge :-) */ 1992 vc->vc_video_erase_char = 1993 (vc->vc_video_erase_char & 0xff00) | 'E'; 1994 csi_J(vc, 2); 1995 vc->vc_video_erase_char = 1996 (vc->vc_video_erase_char & 0xff00) | ' '; 1997 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2); 1998 } 1999 return; 2000 case ESsetG0: 2001 if (c == '0') 2002 vc->vc_G0_charset = GRAF_MAP; 2003 else if (c == 'B') 2004 vc->vc_G0_charset = LAT1_MAP; 2005 else if (c == 'U') 2006 vc->vc_G0_charset = IBMPC_MAP; 2007 else if (c == 'K') 2008 vc->vc_G0_charset = USER_MAP; 2009 if (vc->vc_charset == 0) 2010 vc->vc_translate = set_translate(vc->vc_G0_charset, vc); 2011 vc->vc_state = ESnormal; 2012 return; 2013 case ESsetG1: 2014 if (c == '0') 2015 vc->vc_G1_charset = GRAF_MAP; 2016 else if (c == 'B') 2017 vc->vc_G1_charset = LAT1_MAP; 2018 else if (c == 'U') 2019 vc->vc_G1_charset = IBMPC_MAP; 2020 else if (c == 'K') 2021 vc->vc_G1_charset = USER_MAP; 2022 if (vc->vc_charset == 1) 2023 vc->vc_translate = set_translate(vc->vc_G1_charset, vc); 2024 vc->vc_state = ESnormal; 2025 return; 2026 default: 2027 vc->vc_state = ESnormal; 2028 } 2029 } 2030 2031 /* is_double_width() is based on the wcwidth() implementation by 2032 * Markus Kuhn -- 2007-05-26 (Unicode 5.0) 2033 * Latest version: http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c 2034 */ 2035 struct interval { 2036 uint32_t first; 2037 uint32_t last; 2038 }; 2039 2040 static int bisearch(uint32_t ucs, const struct interval *table, int max) 2041 { 2042 int min = 0; 2043 int mid; 2044 2045 if (ucs < table[0].first || ucs > table[max].last) 2046 return 0; 2047 while (max >= min) { 2048 mid = (min + max) / 2; 2049 if (ucs > table[mid].last) 2050 min = mid + 1; 2051 else if (ucs < table[mid].first) 2052 max = mid - 1; 2053 else 2054 return 1; 2055 } 2056 return 0; 2057 } 2058 2059 static int is_double_width(uint32_t ucs) 2060 { 2061 static const struct interval double_width[] = { 2062 { 0x1100, 0x115F }, { 0x2329, 0x232A }, { 0x2E80, 0x303E }, 2063 { 0x3040, 0xA4CF }, { 0xAC00, 0xD7A3 }, { 0xF900, 0xFAFF }, 2064 { 0xFE10, 0xFE19 }, { 0xFE30, 0xFE6F }, { 0xFF00, 0xFF60 }, 2065 { 0xFFE0, 0xFFE6 }, { 0x20000, 0x2FFFD }, { 0x30000, 0x3FFFD } 2066 }; 2067 return bisearch(ucs, double_width, ARRAY_SIZE(double_width) - 1); 2068 } 2069 2070 /* acquires console_lock */ 2071 static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int count) 2072 { 2073 #ifdef VT_BUF_VRAM_ONLY 2074 #define FLUSH do { } while(0); 2075 #else 2076 #define FLUSH if (draw_x >= 0) { \ 2077 vc->vc_sw->con_putcs(vc, (u16 *)draw_from, (u16 *)draw_to - (u16 *)draw_from, vc->vc_y, draw_x); \ 2078 draw_x = -1; \ 2079 } 2080 #endif 2081 2082 int c, tc, ok, n = 0, draw_x = -1; 2083 unsigned int currcons; 2084 unsigned long draw_from = 0, draw_to = 0; 2085 struct vc_data *vc; 2086 unsigned char vc_attr; 2087 struct vt_notifier_param param; 2088 uint8_t rescan; 2089 uint8_t inverse; 2090 uint8_t width; 2091 u16 himask, charmask; 2092 2093 if (in_interrupt()) 2094 return count; 2095 2096 might_sleep(); 2097 2098 console_lock(); 2099 vc = tty->driver_data; 2100 if (vc == NULL) { 2101 printk(KERN_ERR "vt: argh, driver_data is NULL !\n"); 2102 console_unlock(); 2103 return 0; 2104 } 2105 2106 currcons = vc->vc_num; 2107 if (!vc_cons_allocated(currcons)) { 2108 /* could this happen? */ 2109 pr_warn_once("con_write: tty %d not allocated\n", currcons+1); 2110 console_unlock(); 2111 return 0; 2112 } 2113 2114 himask = vc->vc_hi_font_mask; 2115 charmask = himask ? 0x1ff : 0xff; 2116 2117 /* undraw cursor first */ 2118 if (IS_FG(vc)) 2119 hide_cursor(vc); 2120 2121 param.vc = vc; 2122 2123 while (!tty->stopped && count) { 2124 int orig = *buf; 2125 c = orig; 2126 buf++; 2127 n++; 2128 count--; 2129 rescan = 0; 2130 inverse = 0; 2131 width = 1; 2132 2133 /* Do no translation at all in control states */ 2134 if (vc->vc_state != ESnormal) { 2135 tc = c; 2136 } else if (vc->vc_utf && !vc->vc_disp_ctrl) { 2137 /* Combine UTF-8 into Unicode in vc_utf_char. 2138 * vc_utf_count is the number of continuation bytes still 2139 * expected to arrive. 2140 * vc_npar is the number of continuation bytes arrived so 2141 * far 2142 */ 2143 rescan_last_byte: 2144 if ((c & 0xc0) == 0x80) { 2145 /* Continuation byte received */ 2146 static const uint32_t utf8_length_changes[] = { 0x0000007f, 0x000007ff, 0x0000ffff, 0x001fffff, 0x03ffffff, 0x7fffffff }; 2147 if (vc->vc_utf_count) { 2148 vc->vc_utf_char = (vc->vc_utf_char << 6) | (c & 0x3f); 2149 vc->vc_npar++; 2150 if (--vc->vc_utf_count) { 2151 /* Still need some bytes */ 2152 continue; 2153 } 2154 /* Got a whole character */ 2155 c = vc->vc_utf_char; 2156 /* Reject overlong sequences */ 2157 if (c <= utf8_length_changes[vc->vc_npar - 1] || 2158 c > utf8_length_changes[vc->vc_npar]) 2159 c = 0xfffd; 2160 } else { 2161 /* Unexpected continuation byte */ 2162 vc->vc_utf_count = 0; 2163 c = 0xfffd; 2164 } 2165 } else { 2166 /* Single ASCII byte or first byte of a sequence received */ 2167 if (vc->vc_utf_count) { 2168 /* Continuation byte expected */ 2169 rescan = 1; 2170 vc->vc_utf_count = 0; 2171 c = 0xfffd; 2172 } else if (c > 0x7f) { 2173 /* First byte of a multibyte sequence received */ 2174 vc->vc_npar = 0; 2175 if ((c & 0xe0) == 0xc0) { 2176 vc->vc_utf_count = 1; 2177 vc->vc_utf_char = (c & 0x1f); 2178 } else if ((c & 0xf0) == 0xe0) { 2179 vc->vc_utf_count = 2; 2180 vc->vc_utf_char = (c & 0x0f); 2181 } else if ((c & 0xf8) == 0xf0) { 2182 vc->vc_utf_count = 3; 2183 vc->vc_utf_char = (c & 0x07); 2184 } else if ((c & 0xfc) == 0xf8) { 2185 vc->vc_utf_count = 4; 2186 vc->vc_utf_char = (c & 0x03); 2187 } else if ((c & 0xfe) == 0xfc) { 2188 vc->vc_utf_count = 5; 2189 vc->vc_utf_char = (c & 0x01); 2190 } else { 2191 /* 254 and 255 are invalid */ 2192 c = 0xfffd; 2193 } 2194 if (vc->vc_utf_count) { 2195 /* Still need some bytes */ 2196 continue; 2197 } 2198 } 2199 /* Nothing to do if an ASCII byte was received */ 2200 } 2201 /* End of UTF-8 decoding. */ 2202 /* c is the received character, or U+FFFD for invalid sequences. */ 2203 /* Replace invalid Unicode code points with U+FFFD too */ 2204 if ((c >= 0xd800 && c <= 0xdfff) || c == 0xfffe || c == 0xffff) 2205 c = 0xfffd; 2206 tc = c; 2207 } else { /* no utf or alternate charset mode */ 2208 tc = vc_translate(vc, c); 2209 } 2210 2211 param.c = tc; 2212 if (atomic_notifier_call_chain(&vt_notifier_list, VT_PREWRITE, 2213 ¶m) == NOTIFY_STOP) 2214 continue; 2215 2216 /* If the original code was a control character we 2217 * only allow a glyph to be displayed if the code is 2218 * not normally used (such as for cursor movement) or 2219 * if the disp_ctrl mode has been explicitly enabled. 2220 * Certain characters (as given by the CTRL_ALWAYS 2221 * bitmap) are always displayed as control characters, 2222 * as the console would be pretty useless without 2223 * them; to display an arbitrary font position use the 2224 * direct-to-font zone in UTF-8 mode. 2225 */ 2226 ok = tc && (c >= 32 || 2227 !(vc->vc_disp_ctrl ? (CTRL_ALWAYS >> c) & 1 : 2228 vc->vc_utf || ((CTRL_ACTION >> c) & 1))) 2229 && (c != 127 || vc->vc_disp_ctrl) 2230 && (c != 128+27); 2231 2232 if (vc->vc_state == ESnormal && ok) { 2233 if (vc->vc_utf && !vc->vc_disp_ctrl) { 2234 if (is_double_width(c)) 2235 width = 2; 2236 } 2237 /* Now try to find out how to display it */ 2238 tc = conv_uni_to_pc(vc, tc); 2239 if (tc & ~charmask) { 2240 if (tc == -1 || tc == -2) { 2241 continue; /* nothing to display */ 2242 } 2243 /* Glyph not found */ 2244 if ((!(vc->vc_utf && !vc->vc_disp_ctrl) || c < 128) && !(c & ~charmask)) { 2245 /* In legacy mode use the glyph we get by a 1:1 mapping. 2246 This would make absolutely no sense with Unicode in mind, 2247 but do this for ASCII characters since a font may lack 2248 Unicode mapping info and we don't want to end up with 2249 having question marks only. */ 2250 tc = c; 2251 } else { 2252 /* Display U+FFFD. If it's not found, display an inverse question mark. */ 2253 tc = conv_uni_to_pc(vc, 0xfffd); 2254 if (tc < 0) { 2255 inverse = 1; 2256 tc = conv_uni_to_pc(vc, '?'); 2257 if (tc < 0) tc = '?'; 2258 } 2259 } 2260 } 2261 2262 if (!inverse) { 2263 vc_attr = vc->vc_attr; 2264 } else { 2265 /* invert vc_attr */ 2266 if (!vc->vc_can_do_color) { 2267 vc_attr = (vc->vc_attr) ^ 0x08; 2268 } else if (vc->vc_hi_font_mask == 0x100) { 2269 vc_attr = ((vc->vc_attr) & 0x11) | (((vc->vc_attr) & 0xe0) >> 4) | (((vc->vc_attr) & 0x0e) << 4); 2270 } else { 2271 vc_attr = ((vc->vc_attr) & 0x88) | (((vc->vc_attr) & 0x70) >> 4) | (((vc->vc_attr) & 0x07) << 4); 2272 } 2273 FLUSH 2274 } 2275 2276 while (1) { 2277 if (vc->vc_need_wrap || vc->vc_decim) 2278 FLUSH 2279 if (vc->vc_need_wrap) { 2280 cr(vc); 2281 lf(vc); 2282 } 2283 if (vc->vc_decim) 2284 insert_char(vc, 1); 2285 scr_writew(himask ? 2286 ((vc_attr << 8) & ~himask) + ((tc & 0x100) ? himask : 0) + (tc & 0xff) : 2287 (vc_attr << 8) + tc, 2288 (u16 *) vc->vc_pos); 2289 if (DO_UPDATE(vc) && draw_x < 0) { 2290 draw_x = vc->vc_x; 2291 draw_from = vc->vc_pos; 2292 } 2293 if (vc->vc_x == vc->vc_cols - 1) { 2294 vc->vc_need_wrap = vc->vc_decawm; 2295 draw_to = vc->vc_pos + 2; 2296 } else { 2297 vc->vc_x++; 2298 draw_to = (vc->vc_pos += 2); 2299 } 2300 2301 if (!--width) break; 2302 2303 tc = conv_uni_to_pc(vc, ' '); /* A space is printed in the second column */ 2304 if (tc < 0) tc = ' '; 2305 } 2306 notify_write(vc, c); 2307 2308 if (inverse) { 2309 FLUSH 2310 } 2311 2312 if (rescan) { 2313 rescan = 0; 2314 inverse = 0; 2315 width = 1; 2316 c = orig; 2317 goto rescan_last_byte; 2318 } 2319 continue; 2320 } 2321 FLUSH 2322 do_con_trol(tty, vc, orig); 2323 } 2324 FLUSH 2325 console_conditional_schedule(); 2326 console_unlock(); 2327 notify_update(vc); 2328 return n; 2329 #undef FLUSH 2330 } 2331 2332 /* 2333 * This is the console switching callback. 2334 * 2335 * Doing console switching in a process context allows 2336 * us to do the switches asynchronously (needed when we want 2337 * to switch due to a keyboard interrupt). Synchronization 2338 * with other console code and prevention of re-entrancy is 2339 * ensured with console_lock. 2340 */ 2341 static void console_callback(struct work_struct *ignored) 2342 { 2343 console_lock(); 2344 2345 if (want_console >= 0) { 2346 if (want_console != fg_console && 2347 vc_cons_allocated(want_console)) { 2348 hide_cursor(vc_cons[fg_console].d); 2349 change_console(vc_cons[want_console].d); 2350 /* we only changed when the console had already 2351 been allocated - a new console is not created 2352 in an interrupt routine */ 2353 } 2354 want_console = -1; 2355 } 2356 if (do_poke_blanked_console) { /* do not unblank for a LED change */ 2357 do_poke_blanked_console = 0; 2358 poke_blanked_console(); 2359 } 2360 if (scrollback_delta) { 2361 struct vc_data *vc = vc_cons[fg_console].d; 2362 clear_selection(); 2363 if (vc->vc_mode == KD_TEXT) 2364 vc->vc_sw->con_scrolldelta(vc, scrollback_delta); 2365 scrollback_delta = 0; 2366 } 2367 if (blank_timer_expired) { 2368 do_blank_screen(0); 2369 blank_timer_expired = 0; 2370 } 2371 notify_update(vc_cons[fg_console].d); 2372 2373 console_unlock(); 2374 } 2375 2376 int set_console(int nr) 2377 { 2378 struct vc_data *vc = vc_cons[fg_console].d; 2379 2380 if (!vc_cons_allocated(nr) || vt_dont_switch || 2381 (vc->vt_mode.mode == VT_AUTO && vc->vc_mode == KD_GRAPHICS)) { 2382 2383 /* 2384 * Console switch will fail in console_callback() or 2385 * change_console() so there is no point scheduling 2386 * the callback 2387 * 2388 * Existing set_console() users don't check the return 2389 * value so this shouldn't break anything 2390 */ 2391 return -EINVAL; 2392 } 2393 2394 want_console = nr; 2395 schedule_console_callback(); 2396 2397 return 0; 2398 } 2399 2400 struct tty_driver *console_driver; 2401 2402 #ifdef CONFIG_VT_CONSOLE 2403 2404 /** 2405 * vt_kmsg_redirect() - Sets/gets the kernel message console 2406 * @new: The new virtual terminal number or -1 if the console should stay 2407 * unchanged 2408 * 2409 * By default, the kernel messages are always printed on the current virtual 2410 * console. However, the user may modify that default with the 2411 * TIOCL_SETKMSGREDIRECT ioctl call. 2412 * 2413 * This function sets the kernel message console to be @new. It returns the old 2414 * virtual console number. The virtual terminal number 0 (both as parameter and 2415 * return value) means no redirection (i.e. always printed on the currently 2416 * active console). 2417 * 2418 * The parameter -1 means that only the current console is returned, but the 2419 * value is not modified. You may use the macro vt_get_kmsg_redirect() in that 2420 * case to make the code more understandable. 2421 * 2422 * When the kernel is compiled without CONFIG_VT_CONSOLE, this function ignores 2423 * the parameter and always returns 0. 2424 */ 2425 int vt_kmsg_redirect(int new) 2426 { 2427 static int kmsg_con; 2428 2429 if (new != -1) 2430 return xchg(&kmsg_con, new); 2431 else 2432 return kmsg_con; 2433 } 2434 2435 /* 2436 * Console on virtual terminal 2437 * 2438 * The console must be locked when we get here. 2439 */ 2440 2441 static void vt_console_print(struct console *co, const char *b, unsigned count) 2442 { 2443 struct vc_data *vc = vc_cons[fg_console].d; 2444 unsigned char c; 2445 static DEFINE_SPINLOCK(printing_lock); 2446 const ushort *start; 2447 ushort cnt = 0; 2448 ushort myx; 2449 int kmsg_console; 2450 2451 /* console busy or not yet initialized */ 2452 if (!printable) 2453 return; 2454 if (!spin_trylock(&printing_lock)) 2455 return; 2456 2457 kmsg_console = vt_get_kmsg_redirect(); 2458 if (kmsg_console && vc_cons_allocated(kmsg_console - 1)) 2459 vc = vc_cons[kmsg_console - 1].d; 2460 2461 /* read `x' only after setting currcons properly (otherwise 2462 the `x' macro will read the x of the foreground console). */ 2463 myx = vc->vc_x; 2464 2465 if (!vc_cons_allocated(fg_console)) { 2466 /* impossible */ 2467 /* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */ 2468 goto quit; 2469 } 2470 2471 if (vc->vc_mode != KD_TEXT && !vt_force_oops_output(vc)) 2472 goto quit; 2473 2474 /* undraw cursor first */ 2475 if (IS_FG(vc)) 2476 hide_cursor(vc); 2477 2478 start = (ushort *)vc->vc_pos; 2479 2480 /* Contrived structure to try to emulate original need_wrap behaviour 2481 * Problems caused when we have need_wrap set on '\n' character */ 2482 while (count--) { 2483 c = *b++; 2484 if (c == 10 || c == 13 || c == 8 || vc->vc_need_wrap) { 2485 if (cnt > 0) { 2486 if (CON_IS_VISIBLE(vc)) 2487 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x); 2488 vc->vc_x += cnt; 2489 if (vc->vc_need_wrap) 2490 vc->vc_x--; 2491 cnt = 0; 2492 } 2493 if (c == 8) { /* backspace */ 2494 bs(vc); 2495 start = (ushort *)vc->vc_pos; 2496 myx = vc->vc_x; 2497 continue; 2498 } 2499 if (c != 13) 2500 lf(vc); 2501 cr(vc); 2502 start = (ushort *)vc->vc_pos; 2503 myx = vc->vc_x; 2504 if (c == 10 || c == 13) 2505 continue; 2506 } 2507 scr_writew((vc->vc_attr << 8) + c, (unsigned short *)vc->vc_pos); 2508 notify_write(vc, c); 2509 cnt++; 2510 if (myx == vc->vc_cols - 1) { 2511 vc->vc_need_wrap = 1; 2512 continue; 2513 } 2514 vc->vc_pos += 2; 2515 myx++; 2516 } 2517 if (cnt > 0) { 2518 if (CON_IS_VISIBLE(vc)) 2519 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x); 2520 vc->vc_x += cnt; 2521 if (vc->vc_x == vc->vc_cols) { 2522 vc->vc_x--; 2523 vc->vc_need_wrap = 1; 2524 } 2525 } 2526 set_cursor(vc); 2527 notify_update(vc); 2528 2529 quit: 2530 spin_unlock(&printing_lock); 2531 } 2532 2533 static struct tty_driver *vt_console_device(struct console *c, int *index) 2534 { 2535 *index = c->index ? c->index-1 : fg_console; 2536 return console_driver; 2537 } 2538 2539 static struct console vt_console_driver = { 2540 .name = "tty", 2541 .write = vt_console_print, 2542 .device = vt_console_device, 2543 .unblank = unblank_screen, 2544 .flags = CON_PRINTBUFFER, 2545 .index = -1, 2546 }; 2547 #endif 2548 2549 /* 2550 * Handling of Linux-specific VC ioctls 2551 */ 2552 2553 /* 2554 * Generally a bit racy with respect to console_lock();. 2555 * 2556 * There are some functions which don't need it. 2557 * 2558 * There are some functions which can sleep for arbitrary periods 2559 * (paste_selection) but we don't need the lock there anyway. 2560 * 2561 * set_selection has locking, and definitely needs it 2562 */ 2563 2564 int tioclinux(struct tty_struct *tty, unsigned long arg) 2565 { 2566 char type, data; 2567 char __user *p = (char __user *)arg; 2568 int lines; 2569 int ret; 2570 2571 if (current->signal->tty != tty && !capable(CAP_SYS_ADMIN)) 2572 return -EPERM; 2573 if (get_user(type, p)) 2574 return -EFAULT; 2575 ret = 0; 2576 2577 switch (type) 2578 { 2579 case TIOCL_SETSEL: 2580 console_lock(); 2581 ret = set_selection((struct tiocl_selection __user *)(p+1), tty); 2582 console_unlock(); 2583 break; 2584 case TIOCL_PASTESEL: 2585 ret = paste_selection(tty); 2586 break; 2587 case TIOCL_UNBLANKSCREEN: 2588 console_lock(); 2589 unblank_screen(); 2590 console_unlock(); 2591 break; 2592 case TIOCL_SELLOADLUT: 2593 console_lock(); 2594 ret = sel_loadlut(p); 2595 console_unlock(); 2596 break; 2597 case TIOCL_GETSHIFTSTATE: 2598 2599 /* 2600 * Make it possible to react to Shift+Mousebutton. 2601 * Note that 'shift_state' is an undocumented 2602 * kernel-internal variable; programs not closely 2603 * related to the kernel should not use this. 2604 */ 2605 data = vt_get_shift_state(); 2606 ret = __put_user(data, p); 2607 break; 2608 case TIOCL_GETMOUSEREPORTING: 2609 console_lock(); /* May be overkill */ 2610 data = mouse_reporting(); 2611 console_unlock(); 2612 ret = __put_user(data, p); 2613 break; 2614 case TIOCL_SETVESABLANK: 2615 console_lock(); 2616 ret = set_vesa_blanking(p); 2617 console_unlock(); 2618 break; 2619 case TIOCL_GETKMSGREDIRECT: 2620 data = vt_get_kmsg_redirect(); 2621 ret = __put_user(data, p); 2622 break; 2623 case TIOCL_SETKMSGREDIRECT: 2624 if (!capable(CAP_SYS_ADMIN)) { 2625 ret = -EPERM; 2626 } else { 2627 if (get_user(data, p+1)) 2628 ret = -EFAULT; 2629 else 2630 vt_kmsg_redirect(data); 2631 } 2632 break; 2633 case TIOCL_GETFGCONSOLE: 2634 /* No locking needed as this is a transiently 2635 correct return anyway if the caller hasn't 2636 disabled switching */ 2637 ret = fg_console; 2638 break; 2639 case TIOCL_SCROLLCONSOLE: 2640 if (get_user(lines, (s32 __user *)(p+4))) { 2641 ret = -EFAULT; 2642 } else { 2643 /* Need the console lock here. Note that lots 2644 of other calls need fixing before the lock 2645 is actually useful ! */ 2646 console_lock(); 2647 scrollfront(vc_cons[fg_console].d, lines); 2648 console_unlock(); 2649 ret = 0; 2650 } 2651 break; 2652 case TIOCL_BLANKSCREEN: /* until explicitly unblanked, not only poked */ 2653 console_lock(); 2654 ignore_poke = 1; 2655 do_blank_screen(0); 2656 console_unlock(); 2657 break; 2658 case TIOCL_BLANKEDSCREEN: 2659 ret = console_blanked; 2660 break; 2661 default: 2662 ret = -EINVAL; 2663 break; 2664 } 2665 return ret; 2666 } 2667 2668 /* 2669 * /dev/ttyN handling 2670 */ 2671 2672 static int con_write(struct tty_struct *tty, const unsigned char *buf, int count) 2673 { 2674 int retval; 2675 2676 retval = do_con_write(tty, buf, count); 2677 con_flush_chars(tty); 2678 2679 return retval; 2680 } 2681 2682 static int con_put_char(struct tty_struct *tty, unsigned char ch) 2683 { 2684 if (in_interrupt()) 2685 return 0; /* n_r3964 calls put_char() from interrupt context */ 2686 return do_con_write(tty, &ch, 1); 2687 } 2688 2689 static int con_write_room(struct tty_struct *tty) 2690 { 2691 if (tty->stopped) 2692 return 0; 2693 return 32768; /* No limit, really; we're not buffering */ 2694 } 2695 2696 static int con_chars_in_buffer(struct tty_struct *tty) 2697 { 2698 return 0; /* we're not buffering */ 2699 } 2700 2701 /* 2702 * con_throttle and con_unthrottle are only used for 2703 * paste_selection(), which has to stuff in a large number of 2704 * characters... 2705 */ 2706 static void con_throttle(struct tty_struct *tty) 2707 { 2708 } 2709 2710 static void con_unthrottle(struct tty_struct *tty) 2711 { 2712 struct vc_data *vc = tty->driver_data; 2713 2714 wake_up_interruptible(&vc->paste_wait); 2715 } 2716 2717 /* 2718 * Turn the Scroll-Lock LED on when the tty is stopped 2719 */ 2720 static void con_stop(struct tty_struct *tty) 2721 { 2722 int console_num; 2723 if (!tty) 2724 return; 2725 console_num = tty->index; 2726 if (!vc_cons_allocated(console_num)) 2727 return; 2728 vt_kbd_con_stop(console_num); 2729 } 2730 2731 /* 2732 * Turn the Scroll-Lock LED off when the console is started 2733 */ 2734 static void con_start(struct tty_struct *tty) 2735 { 2736 int console_num; 2737 if (!tty) 2738 return; 2739 console_num = tty->index; 2740 if (!vc_cons_allocated(console_num)) 2741 return; 2742 vt_kbd_con_start(console_num); 2743 } 2744 2745 static void con_flush_chars(struct tty_struct *tty) 2746 { 2747 struct vc_data *vc; 2748 2749 if (in_interrupt()) /* from flush_to_ldisc */ 2750 return; 2751 2752 /* if we race with con_close(), vt may be null */ 2753 console_lock(); 2754 vc = tty->driver_data; 2755 if (vc) 2756 set_cursor(vc); 2757 console_unlock(); 2758 } 2759 2760 /* 2761 * Allocate the console screen memory. 2762 */ 2763 static int con_install(struct tty_driver *driver, struct tty_struct *tty) 2764 { 2765 unsigned int currcons = tty->index; 2766 struct vc_data *vc; 2767 int ret; 2768 2769 console_lock(); 2770 ret = vc_allocate(currcons); 2771 if (ret) 2772 goto unlock; 2773 2774 vc = vc_cons[currcons].d; 2775 2776 /* Still being freed */ 2777 if (vc->port.tty) { 2778 ret = -ERESTARTSYS; 2779 goto unlock; 2780 } 2781 2782 ret = tty_port_install(&vc->port, driver, tty); 2783 if (ret) 2784 goto unlock; 2785 2786 tty->driver_data = vc; 2787 vc->port.tty = tty; 2788 2789 if (!tty->winsize.ws_row && !tty->winsize.ws_col) { 2790 tty->winsize.ws_row = vc_cons[currcons].d->vc_rows; 2791 tty->winsize.ws_col = vc_cons[currcons].d->vc_cols; 2792 } 2793 if (vc->vc_utf) 2794 tty->termios.c_iflag |= IUTF8; 2795 else 2796 tty->termios.c_iflag &= ~IUTF8; 2797 unlock: 2798 console_unlock(); 2799 return ret; 2800 } 2801 2802 static int con_open(struct tty_struct *tty, struct file *filp) 2803 { 2804 /* everything done in install */ 2805 return 0; 2806 } 2807 2808 2809 static void con_close(struct tty_struct *tty, struct file *filp) 2810 { 2811 /* Nothing to do - we defer to shutdown */ 2812 } 2813 2814 static void con_shutdown(struct tty_struct *tty) 2815 { 2816 struct vc_data *vc = tty->driver_data; 2817 BUG_ON(vc == NULL); 2818 console_lock(); 2819 vc->port.tty = NULL; 2820 console_unlock(); 2821 } 2822 2823 static int default_color = 7; /* white */ 2824 static int default_italic_color = 2; // green (ASCII) 2825 static int default_underline_color = 3; // cyan (ASCII) 2826 module_param_named(color, default_color, int, S_IRUGO | S_IWUSR); 2827 module_param_named(italic, default_italic_color, int, S_IRUGO | S_IWUSR); 2828 module_param_named(underline, default_underline_color, int, S_IRUGO | S_IWUSR); 2829 2830 static void vc_init(struct vc_data *vc, unsigned int rows, 2831 unsigned int cols, int do_clear) 2832 { 2833 int j, k ; 2834 2835 vc->vc_cols = cols; 2836 vc->vc_rows = rows; 2837 vc->vc_size_row = cols << 1; 2838 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row; 2839 2840 set_origin(vc); 2841 vc->vc_pos = vc->vc_origin; 2842 reset_vc(vc); 2843 for (j=k=0; j<16; j++) { 2844 vc->vc_palette[k++] = default_red[j] ; 2845 vc->vc_palette[k++] = default_grn[j] ; 2846 vc->vc_palette[k++] = default_blu[j] ; 2847 } 2848 vc->vc_def_color = default_color; 2849 vc->vc_ulcolor = default_underline_color; 2850 vc->vc_itcolor = default_italic_color; 2851 vc->vc_halfcolor = 0x08; /* grey */ 2852 init_waitqueue_head(&vc->paste_wait); 2853 reset_terminal(vc, do_clear); 2854 } 2855 2856 /* 2857 * This routine initializes console interrupts, and does nothing 2858 * else. If you want the screen to clear, call tty_write with 2859 * the appropriate escape-sequence. 2860 */ 2861 2862 static int __init con_init(void) 2863 { 2864 const char *display_desc = NULL; 2865 struct vc_data *vc; 2866 unsigned int currcons = 0, i; 2867 2868 console_lock(); 2869 2870 if (conswitchp) 2871 display_desc = conswitchp->con_startup(); 2872 if (!display_desc) { 2873 fg_console = 0; 2874 console_unlock(); 2875 return 0; 2876 } 2877 2878 for (i = 0; i < MAX_NR_CON_DRIVER; i++) { 2879 struct con_driver *con_driver = ®istered_con_driver[i]; 2880 2881 if (con_driver->con == NULL) { 2882 con_driver->con = conswitchp; 2883 con_driver->desc = display_desc; 2884 con_driver->flag = CON_DRIVER_FLAG_INIT; 2885 con_driver->first = 0; 2886 con_driver->last = MAX_NR_CONSOLES - 1; 2887 break; 2888 } 2889 } 2890 2891 for (i = 0; i < MAX_NR_CONSOLES; i++) 2892 con_driver_map[i] = conswitchp; 2893 2894 if (blankinterval) { 2895 blank_state = blank_normal_wait; 2896 mod_timer(&console_timer, jiffies + (blankinterval * HZ)); 2897 } 2898 2899 for (currcons = 0; currcons < MIN_NR_CONSOLES; currcons++) { 2900 vc_cons[currcons].d = vc = kzalloc(sizeof(struct vc_data), GFP_NOWAIT); 2901 INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK); 2902 tty_port_init(&vc->port); 2903 visual_init(vc, currcons, 1); 2904 vc->vc_screenbuf = kzalloc(vc->vc_screenbuf_size, GFP_NOWAIT); 2905 vc_init(vc, vc->vc_rows, vc->vc_cols, 2906 currcons || !vc->vc_sw->con_save_screen); 2907 } 2908 currcons = fg_console = 0; 2909 master_display_fg = vc = vc_cons[currcons].d; 2910 set_origin(vc); 2911 save_screen(vc); 2912 gotoxy(vc, vc->vc_x, vc->vc_y); 2913 csi_J(vc, 0); 2914 update_screen(vc); 2915 pr_info("Console: %s %s %dx%d\n", 2916 vc->vc_can_do_color ? "colour" : "mono", 2917 display_desc, vc->vc_cols, vc->vc_rows); 2918 printable = 1; 2919 2920 console_unlock(); 2921 2922 #ifdef CONFIG_VT_CONSOLE 2923 register_console(&vt_console_driver); 2924 #endif 2925 return 0; 2926 } 2927 console_initcall(con_init); 2928 2929 static const struct tty_operations con_ops = { 2930 .install = con_install, 2931 .open = con_open, 2932 .close = con_close, 2933 .write = con_write, 2934 .write_room = con_write_room, 2935 .put_char = con_put_char, 2936 .flush_chars = con_flush_chars, 2937 .chars_in_buffer = con_chars_in_buffer, 2938 .ioctl = vt_ioctl, 2939 #ifdef CONFIG_COMPAT 2940 .compat_ioctl = vt_compat_ioctl, 2941 #endif 2942 .stop = con_stop, 2943 .start = con_start, 2944 .throttle = con_throttle, 2945 .unthrottle = con_unthrottle, 2946 .resize = vt_resize, 2947 .shutdown = con_shutdown 2948 }; 2949 2950 static struct cdev vc0_cdev; 2951 2952 static ssize_t show_tty_active(struct device *dev, 2953 struct device_attribute *attr, char *buf) 2954 { 2955 return sprintf(buf, "tty%d\n", fg_console + 1); 2956 } 2957 static DEVICE_ATTR(active, S_IRUGO, show_tty_active, NULL); 2958 2959 int __init vty_init(const struct file_operations *console_fops) 2960 { 2961 cdev_init(&vc0_cdev, console_fops); 2962 if (cdev_add(&vc0_cdev, MKDEV(TTY_MAJOR, 0), 1) || 2963 register_chrdev_region(MKDEV(TTY_MAJOR, 0), 1, "/dev/vc/0") < 0) 2964 panic("Couldn't register /dev/tty0 driver\n"); 2965 tty0dev = device_create(tty_class, NULL, MKDEV(TTY_MAJOR, 0), NULL, "tty0"); 2966 if (IS_ERR(tty0dev)) 2967 tty0dev = NULL; 2968 else 2969 WARN_ON(device_create_file(tty0dev, &dev_attr_active) < 0); 2970 2971 vcs_init(); 2972 2973 console_driver = alloc_tty_driver(MAX_NR_CONSOLES); 2974 if (!console_driver) 2975 panic("Couldn't allocate console driver\n"); 2976 2977 console_driver->name = "tty"; 2978 console_driver->name_base = 1; 2979 console_driver->major = TTY_MAJOR; 2980 console_driver->minor_start = 1; 2981 console_driver->type = TTY_DRIVER_TYPE_CONSOLE; 2982 console_driver->init_termios = tty_std_termios; 2983 if (default_utf8) 2984 console_driver->init_termios.c_iflag |= IUTF8; 2985 console_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_RESET_TERMIOS; 2986 tty_set_operations(console_driver, &con_ops); 2987 if (tty_register_driver(console_driver)) 2988 panic("Couldn't register console driver\n"); 2989 kbd_init(); 2990 console_map_init(); 2991 #ifdef CONFIG_MDA_CONSOLE 2992 mda_console_init(); 2993 #endif 2994 return 0; 2995 } 2996 2997 #ifndef VT_SINGLE_DRIVER 2998 2999 static struct class *vtconsole_class; 3000 3001 static int do_bind_con_driver(const struct consw *csw, int first, int last, 3002 int deflt) 3003 { 3004 struct module *owner = csw->owner; 3005 const char *desc = NULL; 3006 struct con_driver *con_driver; 3007 int i, j = -1, k = -1, retval = -ENODEV; 3008 3009 if (!try_module_get(owner)) 3010 return -ENODEV; 3011 3012 WARN_CONSOLE_UNLOCKED(); 3013 3014 /* check if driver is registered */ 3015 for (i = 0; i < MAX_NR_CON_DRIVER; i++) { 3016 con_driver = ®istered_con_driver[i]; 3017 3018 if (con_driver->con == csw) { 3019 desc = con_driver->desc; 3020 retval = 0; 3021 break; 3022 } 3023 } 3024 3025 if (retval) 3026 goto err; 3027 3028 if (!(con_driver->flag & CON_DRIVER_FLAG_INIT)) { 3029 csw->con_startup(); 3030 con_driver->flag |= CON_DRIVER_FLAG_INIT; 3031 } 3032 3033 if (deflt) { 3034 if (conswitchp) 3035 module_put(conswitchp->owner); 3036 3037 __module_get(owner); 3038 conswitchp = csw; 3039 } 3040 3041 first = max(first, con_driver->first); 3042 last = min(last, con_driver->last); 3043 3044 for (i = first; i <= last; i++) { 3045 int old_was_color; 3046 struct vc_data *vc = vc_cons[i].d; 3047 3048 if (con_driver_map[i]) 3049 module_put(con_driver_map[i]->owner); 3050 __module_get(owner); 3051 con_driver_map[i] = csw; 3052 3053 if (!vc || !vc->vc_sw) 3054 continue; 3055 3056 j = i; 3057 3058 if (CON_IS_VISIBLE(vc)) { 3059 k = i; 3060 save_screen(vc); 3061 } 3062 3063 old_was_color = vc->vc_can_do_color; 3064 vc->vc_sw->con_deinit(vc); 3065 vc->vc_origin = (unsigned long)vc->vc_screenbuf; 3066 visual_init(vc, i, 0); 3067 set_origin(vc); 3068 update_attr(vc); 3069 3070 /* If the console changed between mono <-> color, then 3071 * the attributes in the screenbuf will be wrong. The 3072 * following resets all attributes to something sane. 3073 */ 3074 if (old_was_color != vc->vc_can_do_color) 3075 clear_buffer_attributes(vc); 3076 } 3077 3078 pr_info("Console: switching "); 3079 if (!deflt) 3080 printk("consoles %d-%d ", first+1, last+1); 3081 if (j >= 0) { 3082 struct vc_data *vc = vc_cons[j].d; 3083 3084 printk("to %s %s %dx%d\n", 3085 vc->vc_can_do_color ? "colour" : "mono", 3086 desc, vc->vc_cols, vc->vc_rows); 3087 3088 if (k >= 0) { 3089 vc = vc_cons[k].d; 3090 update_screen(vc); 3091 } 3092 } else 3093 printk("to %s\n", desc); 3094 3095 retval = 0; 3096 err: 3097 module_put(owner); 3098 return retval; 3099 }; 3100 3101 3102 #ifdef CONFIG_VT_HW_CONSOLE_BINDING 3103 static int con_is_graphics(const struct consw *csw, int first, int last) 3104 { 3105 int i, retval = 0; 3106 3107 for (i = first; i <= last; i++) { 3108 struct vc_data *vc = vc_cons[i].d; 3109 3110 if (vc && vc->vc_mode == KD_GRAPHICS) { 3111 retval = 1; 3112 break; 3113 } 3114 } 3115 3116 return retval; 3117 } 3118 3119 /* unlocked version of unbind_con_driver() */ 3120 int do_unbind_con_driver(const struct consw *csw, int first, int last, int deflt) 3121 { 3122 struct module *owner = csw->owner; 3123 const struct consw *defcsw = NULL; 3124 struct con_driver *con_driver = NULL, *con_back = NULL; 3125 int i, retval = -ENODEV; 3126 3127 if (!try_module_get(owner)) 3128 return -ENODEV; 3129 3130 WARN_CONSOLE_UNLOCKED(); 3131 3132 /* check if driver is registered and if it is unbindable */ 3133 for (i = 0; i < MAX_NR_CON_DRIVER; i++) { 3134 con_driver = ®istered_con_driver[i]; 3135 3136 if (con_driver->con == csw && 3137 con_driver->flag & CON_DRIVER_FLAG_MODULE) { 3138 retval = 0; 3139 break; 3140 } 3141 } 3142 3143 if (retval) 3144 goto err; 3145 3146 retval = -ENODEV; 3147 3148 /* check if backup driver exists */ 3149 for (i = 0; i < MAX_NR_CON_DRIVER; i++) { 3150 con_back = ®istered_con_driver[i]; 3151 3152 if (con_back->con && 3153 !(con_back->flag & CON_DRIVER_FLAG_MODULE)) { 3154 defcsw = con_back->con; 3155 retval = 0; 3156 break; 3157 } 3158 } 3159 3160 if (retval) 3161 goto err; 3162 3163 if (!con_is_bound(csw)) 3164 goto err; 3165 3166 first = max(first, con_driver->first); 3167 last = min(last, con_driver->last); 3168 3169 for (i = first; i <= last; i++) { 3170 if (con_driver_map[i] == csw) { 3171 module_put(csw->owner); 3172 con_driver_map[i] = NULL; 3173 } 3174 } 3175 3176 if (!con_is_bound(defcsw)) { 3177 const struct consw *defconsw = conswitchp; 3178 3179 defcsw->con_startup(); 3180 con_back->flag |= CON_DRIVER_FLAG_INIT; 3181 /* 3182 * vgacon may change the default driver to point 3183 * to dummycon, we restore it here... 3184 */ 3185 conswitchp = defconsw; 3186 } 3187 3188 if (!con_is_bound(csw)) 3189 con_driver->flag &= ~CON_DRIVER_FLAG_INIT; 3190 3191 /* ignore return value, binding should not fail */ 3192 do_bind_con_driver(defcsw, first, last, deflt); 3193 err: 3194 module_put(owner); 3195 return retval; 3196 3197 } 3198 EXPORT_SYMBOL_GPL(do_unbind_con_driver); 3199 3200 static int vt_bind(struct con_driver *con) 3201 { 3202 const struct consw *defcsw = NULL, *csw = NULL; 3203 int i, more = 1, first = -1, last = -1, deflt = 0; 3204 3205 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) || 3206 con_is_graphics(con->con, con->first, con->last)) 3207 goto err; 3208 3209 csw = con->con; 3210 3211 for (i = 0; i < MAX_NR_CON_DRIVER; i++) { 3212 struct con_driver *con = ®istered_con_driver[i]; 3213 3214 if (con->con && !(con->flag & CON_DRIVER_FLAG_MODULE)) { 3215 defcsw = con->con; 3216 break; 3217 } 3218 } 3219 3220 if (!defcsw) 3221 goto err; 3222 3223 while (more) { 3224 more = 0; 3225 3226 for (i = con->first; i <= con->last; i++) { 3227 if (con_driver_map[i] == defcsw) { 3228 if (first == -1) 3229 first = i; 3230 last = i; 3231 more = 1; 3232 } else if (first != -1) 3233 break; 3234 } 3235 3236 if (first == 0 && last == MAX_NR_CONSOLES -1) 3237 deflt = 1; 3238 3239 if (first != -1) { 3240 console_lock(); 3241 do_bind_con_driver(csw, first, last, deflt); 3242 console_unlock(); 3243 } 3244 3245 first = -1; 3246 last = -1; 3247 deflt = 0; 3248 } 3249 3250 err: 3251 return 0; 3252 } 3253 3254 static int vt_unbind(struct con_driver *con) 3255 { 3256 const struct consw *csw = NULL; 3257 int i, more = 1, first = -1, last = -1, deflt = 0; 3258 3259 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) || 3260 con_is_graphics(con->con, con->first, con->last)) 3261 goto err; 3262 3263 csw = con->con; 3264 3265 while (more) { 3266 more = 0; 3267 3268 for (i = con->first; i <= con->last; i++) { 3269 if (con_driver_map[i] == csw) { 3270 if (first == -1) 3271 first = i; 3272 last = i; 3273 more = 1; 3274 } else if (first != -1) 3275 break; 3276 } 3277 3278 if (first == 0 && last == MAX_NR_CONSOLES -1) 3279 deflt = 1; 3280 3281 if (first != -1) { 3282 console_lock(); 3283 do_unbind_con_driver(csw, first, last, deflt); 3284 console_unlock(); 3285 } 3286 3287 first = -1; 3288 last = -1; 3289 deflt = 0; 3290 } 3291 3292 err: 3293 return 0; 3294 } 3295 #else 3296 static inline int vt_bind(struct con_driver *con) 3297 { 3298 return 0; 3299 } 3300 static inline int vt_unbind(struct con_driver *con) 3301 { 3302 return 0; 3303 } 3304 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */ 3305 3306 static ssize_t store_bind(struct device *dev, struct device_attribute *attr, 3307 const char *buf, size_t count) 3308 { 3309 struct con_driver *con = dev_get_drvdata(dev); 3310 int bind = simple_strtoul(buf, NULL, 0); 3311 3312 if (bind) 3313 vt_bind(con); 3314 else 3315 vt_unbind(con); 3316 3317 return count; 3318 } 3319 3320 static ssize_t show_bind(struct device *dev, struct device_attribute *attr, 3321 char *buf) 3322 { 3323 struct con_driver *con = dev_get_drvdata(dev); 3324 int bind = con_is_bound(con->con); 3325 3326 return snprintf(buf, PAGE_SIZE, "%i\n", bind); 3327 } 3328 3329 static ssize_t show_name(struct device *dev, struct device_attribute *attr, 3330 char *buf) 3331 { 3332 struct con_driver *con = dev_get_drvdata(dev); 3333 3334 return snprintf(buf, PAGE_SIZE, "%s %s\n", 3335 (con->flag & CON_DRIVER_FLAG_MODULE) ? "(M)" : "(S)", 3336 con->desc); 3337 3338 } 3339 3340 static struct device_attribute device_attrs[] = { 3341 __ATTR(bind, S_IRUGO|S_IWUSR, show_bind, store_bind), 3342 __ATTR(name, S_IRUGO, show_name, NULL), 3343 }; 3344 3345 static int vtconsole_init_device(struct con_driver *con) 3346 { 3347 int i; 3348 int error = 0; 3349 3350 con->flag |= CON_DRIVER_FLAG_ATTR; 3351 dev_set_drvdata(con->dev, con); 3352 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) { 3353 error = device_create_file(con->dev, &device_attrs[i]); 3354 if (error) 3355 break; 3356 } 3357 3358 if (error) { 3359 while (--i >= 0) 3360 device_remove_file(con->dev, &device_attrs[i]); 3361 con->flag &= ~CON_DRIVER_FLAG_ATTR; 3362 } 3363 3364 return error; 3365 } 3366 3367 static void vtconsole_deinit_device(struct con_driver *con) 3368 { 3369 int i; 3370 3371 if (con->flag & CON_DRIVER_FLAG_ATTR) { 3372 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) 3373 device_remove_file(con->dev, &device_attrs[i]); 3374 con->flag &= ~CON_DRIVER_FLAG_ATTR; 3375 } 3376 } 3377 3378 /** 3379 * con_is_bound - checks if driver is bound to the console 3380 * @csw: console driver 3381 * 3382 * RETURNS: zero if unbound, nonzero if bound 3383 * 3384 * Drivers can call this and if zero, they should release 3385 * all resources allocated on con_startup() 3386 */ 3387 int con_is_bound(const struct consw *csw) 3388 { 3389 int i, bound = 0; 3390 3391 for (i = 0; i < MAX_NR_CONSOLES; i++) { 3392 if (con_driver_map[i] == csw) { 3393 bound = 1; 3394 break; 3395 } 3396 } 3397 3398 return bound; 3399 } 3400 EXPORT_SYMBOL(con_is_bound); 3401 3402 /** 3403 * con_debug_enter - prepare the console for the kernel debugger 3404 * @sw: console driver 3405 * 3406 * Called when the console is taken over by the kernel debugger, this 3407 * function needs to save the current console state, then put the console 3408 * into a state suitable for the kernel debugger. 3409 * 3410 * RETURNS: 3411 * Zero on success, nonzero if a failure occurred when trying to prepare 3412 * the console for the debugger. 3413 */ 3414 int con_debug_enter(struct vc_data *vc) 3415 { 3416 int ret = 0; 3417 3418 saved_fg_console = fg_console; 3419 saved_last_console = last_console; 3420 saved_want_console = want_console; 3421 saved_vc_mode = vc->vc_mode; 3422 saved_console_blanked = console_blanked; 3423 vc->vc_mode = KD_TEXT; 3424 console_blanked = 0; 3425 if (vc->vc_sw->con_debug_enter) 3426 ret = vc->vc_sw->con_debug_enter(vc); 3427 #ifdef CONFIG_KGDB_KDB 3428 /* Set the initial LINES variable if it is not already set */ 3429 if (vc->vc_rows < 999) { 3430 int linecount; 3431 char lns[4]; 3432 const char *setargs[3] = { 3433 "set", 3434 "LINES", 3435 lns, 3436 }; 3437 if (kdbgetintenv(setargs[0], &linecount)) { 3438 snprintf(lns, 4, "%i", vc->vc_rows); 3439 kdb_set(2, setargs); 3440 } 3441 } 3442 if (vc->vc_cols < 999) { 3443 int colcount; 3444 char cols[4]; 3445 const char *setargs[3] = { 3446 "set", 3447 "COLUMNS", 3448 cols, 3449 }; 3450 if (kdbgetintenv(setargs[0], &colcount)) { 3451 snprintf(cols, 4, "%i", vc->vc_cols); 3452 kdb_set(2, setargs); 3453 } 3454 } 3455 #endif /* CONFIG_KGDB_KDB */ 3456 return ret; 3457 } 3458 EXPORT_SYMBOL_GPL(con_debug_enter); 3459 3460 /** 3461 * con_debug_leave - restore console state 3462 * @sw: console driver 3463 * 3464 * Restore the console state to what it was before the kernel debugger 3465 * was invoked. 3466 * 3467 * RETURNS: 3468 * Zero on success, nonzero if a failure occurred when trying to restore 3469 * the console. 3470 */ 3471 int con_debug_leave(void) 3472 { 3473 struct vc_data *vc; 3474 int ret = 0; 3475 3476 fg_console = saved_fg_console; 3477 last_console = saved_last_console; 3478 want_console = saved_want_console; 3479 console_blanked = saved_console_blanked; 3480 vc_cons[fg_console].d->vc_mode = saved_vc_mode; 3481 3482 vc = vc_cons[fg_console].d; 3483 if (vc->vc_sw->con_debug_leave) 3484 ret = vc->vc_sw->con_debug_leave(vc); 3485 return ret; 3486 } 3487 EXPORT_SYMBOL_GPL(con_debug_leave); 3488 3489 static int do_register_con_driver(const struct consw *csw, int first, int last) 3490 { 3491 struct module *owner = csw->owner; 3492 struct con_driver *con_driver; 3493 const char *desc; 3494 int i, retval = 0; 3495 3496 WARN_CONSOLE_UNLOCKED(); 3497 3498 if (!try_module_get(owner)) 3499 return -ENODEV; 3500 3501 for (i = 0; i < MAX_NR_CON_DRIVER; i++) { 3502 con_driver = ®istered_con_driver[i]; 3503 3504 /* already registered */ 3505 if (con_driver->con == csw) 3506 retval = -EBUSY; 3507 } 3508 3509 if (retval) 3510 goto err; 3511 3512 desc = csw->con_startup(); 3513 3514 if (!desc) 3515 goto err; 3516 3517 retval = -EINVAL; 3518 3519 for (i = 0; i < MAX_NR_CON_DRIVER; i++) { 3520 con_driver = ®istered_con_driver[i]; 3521 3522 if (con_driver->con == NULL) { 3523 con_driver->con = csw; 3524 con_driver->desc = desc; 3525 con_driver->node = i; 3526 con_driver->flag = CON_DRIVER_FLAG_MODULE | 3527 CON_DRIVER_FLAG_INIT; 3528 con_driver->first = first; 3529 con_driver->last = last; 3530 retval = 0; 3531 break; 3532 } 3533 } 3534 3535 if (retval) 3536 goto err; 3537 3538 con_driver->dev = device_create(vtconsole_class, NULL, 3539 MKDEV(0, con_driver->node), 3540 NULL, "vtcon%i", 3541 con_driver->node); 3542 3543 if (IS_ERR(con_driver->dev)) { 3544 printk(KERN_WARNING "Unable to create device for %s; " 3545 "errno = %ld\n", con_driver->desc, 3546 PTR_ERR(con_driver->dev)); 3547 con_driver->dev = NULL; 3548 } else { 3549 vtconsole_init_device(con_driver); 3550 } 3551 3552 err: 3553 module_put(owner); 3554 return retval; 3555 } 3556 3557 3558 /** 3559 * do_unregister_con_driver - unregister console driver from console layer 3560 * @csw: console driver 3561 * 3562 * DESCRIPTION: All drivers that registers to the console layer must 3563 * call this function upon exit, or if the console driver is in a state 3564 * where it won't be able to handle console services, such as the 3565 * framebuffer console without loaded framebuffer drivers. 3566 * 3567 * The driver must unbind first prior to unregistration. 3568 */ 3569 int do_unregister_con_driver(const struct consw *csw) 3570 { 3571 int i, retval = -ENODEV; 3572 3573 /* cannot unregister a bound driver */ 3574 if (con_is_bound(csw)) 3575 goto err; 3576 3577 for (i = 0; i < MAX_NR_CON_DRIVER; i++) { 3578 struct con_driver *con_driver = ®istered_con_driver[i]; 3579 3580 if (con_driver->con == csw && 3581 con_driver->flag & CON_DRIVER_FLAG_MODULE) { 3582 vtconsole_deinit_device(con_driver); 3583 device_destroy(vtconsole_class, 3584 MKDEV(0, con_driver->node)); 3585 con_driver->con = NULL; 3586 con_driver->desc = NULL; 3587 con_driver->dev = NULL; 3588 con_driver->node = 0; 3589 con_driver->flag = 0; 3590 con_driver->first = 0; 3591 con_driver->last = 0; 3592 retval = 0; 3593 break; 3594 } 3595 } 3596 err: 3597 return retval; 3598 } 3599 EXPORT_SYMBOL_GPL(do_unregister_con_driver); 3600 3601 /* 3602 * If we support more console drivers, this function is used 3603 * when a driver wants to take over some existing consoles 3604 * and become default driver for newly opened ones. 3605 * 3606 * do_take_over_console is basically a register followed by unbind 3607 */ 3608 int do_take_over_console(const struct consw *csw, int first, int last, int deflt) 3609 { 3610 int err; 3611 3612 err = do_register_con_driver(csw, first, last); 3613 /* 3614 * If we get an busy error we still want to bind the console driver 3615 * and return success, as we may have unbound the console driver 3616 * but not unregistered it. 3617 */ 3618 if (err == -EBUSY) 3619 err = 0; 3620 if (!err) 3621 do_bind_con_driver(csw, first, last, deflt); 3622 3623 return err; 3624 } 3625 EXPORT_SYMBOL_GPL(do_take_over_console); 3626 3627 3628 /* 3629 * give_up_console is a wrapper to unregister_con_driver. It will only 3630 * work if driver is fully unbound. 3631 */ 3632 void give_up_console(const struct consw *csw) 3633 { 3634 console_lock(); 3635 do_unregister_con_driver(csw); 3636 console_unlock(); 3637 } 3638 3639 static int __init vtconsole_class_init(void) 3640 { 3641 int i; 3642 3643 vtconsole_class = class_create(THIS_MODULE, "vtconsole"); 3644 if (IS_ERR(vtconsole_class)) { 3645 printk(KERN_WARNING "Unable to create vt console class; " 3646 "errno = %ld\n", PTR_ERR(vtconsole_class)); 3647 vtconsole_class = NULL; 3648 } 3649 3650 /* Add system drivers to sysfs */ 3651 for (i = 0; i < MAX_NR_CON_DRIVER; i++) { 3652 struct con_driver *con = ®istered_con_driver[i]; 3653 3654 if (con->con && !con->dev) { 3655 con->dev = device_create(vtconsole_class, NULL, 3656 MKDEV(0, con->node), 3657 NULL, "vtcon%i", 3658 con->node); 3659 3660 if (IS_ERR(con->dev)) { 3661 printk(KERN_WARNING "Unable to create " 3662 "device for %s; errno = %ld\n", 3663 con->desc, PTR_ERR(con->dev)); 3664 con->dev = NULL; 3665 } else { 3666 vtconsole_init_device(con); 3667 } 3668 } 3669 } 3670 3671 return 0; 3672 } 3673 postcore_initcall(vtconsole_class_init); 3674 3675 #endif 3676 3677 /* 3678 * Screen blanking 3679 */ 3680 3681 static int set_vesa_blanking(char __user *p) 3682 { 3683 unsigned int mode; 3684 3685 if (get_user(mode, p + 1)) 3686 return -EFAULT; 3687 3688 vesa_blank_mode = (mode < 4) ? mode : 0; 3689 return 0; 3690 } 3691 3692 void do_blank_screen(int entering_gfx) 3693 { 3694 struct vc_data *vc = vc_cons[fg_console].d; 3695 int i; 3696 3697 WARN_CONSOLE_UNLOCKED(); 3698 3699 if (console_blanked) { 3700 if (blank_state == blank_vesa_wait) { 3701 blank_state = blank_off; 3702 vc->vc_sw->con_blank(vc, vesa_blank_mode + 1, 0); 3703 } 3704 return; 3705 } 3706 3707 /* entering graphics mode? */ 3708 if (entering_gfx) { 3709 hide_cursor(vc); 3710 save_screen(vc); 3711 vc->vc_sw->con_blank(vc, -1, 1); 3712 console_blanked = fg_console + 1; 3713 blank_state = blank_off; 3714 set_origin(vc); 3715 return; 3716 } 3717 3718 if (blank_state != blank_normal_wait) 3719 return; 3720 blank_state = blank_off; 3721 3722 /* don't blank graphics */ 3723 if (vc->vc_mode != KD_TEXT) { 3724 console_blanked = fg_console + 1; 3725 return; 3726 } 3727 3728 hide_cursor(vc); 3729 del_timer_sync(&console_timer); 3730 blank_timer_expired = 0; 3731 3732 save_screen(vc); 3733 /* In case we need to reset origin, blanking hook returns 1 */ 3734 i = vc->vc_sw->con_blank(vc, vesa_off_interval ? 1 : (vesa_blank_mode + 1), 0); 3735 console_blanked = fg_console + 1; 3736 if (i) 3737 set_origin(vc); 3738 3739 if (console_blank_hook && console_blank_hook(1)) 3740 return; 3741 3742 if (vesa_off_interval && vesa_blank_mode) { 3743 blank_state = blank_vesa_wait; 3744 mod_timer(&console_timer, jiffies + vesa_off_interval); 3745 } 3746 vt_event_post(VT_EVENT_BLANK, vc->vc_num, vc->vc_num); 3747 } 3748 EXPORT_SYMBOL(do_blank_screen); 3749 3750 /* 3751 * Called by timer as well as from vt_console_driver 3752 */ 3753 void do_unblank_screen(int leaving_gfx) 3754 { 3755 struct vc_data *vc; 3756 3757 /* This should now always be called from a "sane" (read: can schedule) 3758 * context for the sake of the low level drivers, except in the special 3759 * case of oops_in_progress 3760 */ 3761 if (!oops_in_progress) 3762 might_sleep(); 3763 3764 WARN_CONSOLE_UNLOCKED(); 3765 3766 ignore_poke = 0; 3767 if (!console_blanked) 3768 return; 3769 if (!vc_cons_allocated(fg_console)) { 3770 /* impossible */ 3771 pr_warning("unblank_screen: tty %d not allocated ??\n", 3772 fg_console+1); 3773 return; 3774 } 3775 vc = vc_cons[fg_console].d; 3776 /* Try to unblank in oops case too */ 3777 if (vc->vc_mode != KD_TEXT && !vt_force_oops_output(vc)) 3778 return; /* but leave console_blanked != 0 */ 3779 3780 if (blankinterval) { 3781 mod_timer(&console_timer, jiffies + (blankinterval * HZ)); 3782 blank_state = blank_normal_wait; 3783 } 3784 3785 console_blanked = 0; 3786 if (vc->vc_sw->con_blank(vc, 0, leaving_gfx) || vt_force_oops_output(vc)) 3787 /* Low-level driver cannot restore -> do it ourselves */ 3788 update_screen(vc); 3789 if (console_blank_hook) 3790 console_blank_hook(0); 3791 set_palette(vc); 3792 set_cursor(vc); 3793 vt_event_post(VT_EVENT_UNBLANK, vc->vc_num, vc->vc_num); 3794 } 3795 EXPORT_SYMBOL(do_unblank_screen); 3796 3797 /* 3798 * This is called by the outside world to cause a forced unblank, mostly for 3799 * oopses. Currently, I just call do_unblank_screen(0), but we could eventually 3800 * call it with 1 as an argument and so force a mode restore... that may kill 3801 * X or at least garbage the screen but would also make the Oops visible... 3802 */ 3803 void unblank_screen(void) 3804 { 3805 do_unblank_screen(0); 3806 } 3807 3808 /* 3809 * We defer the timer blanking to work queue so it can take the console mutex 3810 * (console operations can still happen at irq time, but only from printk which 3811 * has the console mutex. Not perfect yet, but better than no locking 3812 */ 3813 static void blank_screen_t(unsigned long dummy) 3814 { 3815 if (unlikely(!keventd_up())) { 3816 mod_timer(&console_timer, jiffies + (blankinterval * HZ)); 3817 return; 3818 } 3819 blank_timer_expired = 1; 3820 schedule_work(&console_work); 3821 } 3822 3823 void poke_blanked_console(void) 3824 { 3825 WARN_CONSOLE_UNLOCKED(); 3826 3827 /* Add this so we quickly catch whoever might call us in a non 3828 * safe context. Nowadays, unblank_screen() isn't to be called in 3829 * atomic contexts and is allowed to schedule (with the special case 3830 * of oops_in_progress, but that isn't of any concern for this 3831 * function. --BenH. 3832 */ 3833 might_sleep(); 3834 3835 /* This isn't perfectly race free, but a race here would be mostly harmless, 3836 * at worse, we'll do a spurrious blank and it's unlikely 3837 */ 3838 del_timer(&console_timer); 3839 blank_timer_expired = 0; 3840 3841 if (ignore_poke || !vc_cons[fg_console].d || vc_cons[fg_console].d->vc_mode == KD_GRAPHICS) 3842 return; 3843 if (console_blanked) 3844 unblank_screen(); 3845 else if (blankinterval) { 3846 mod_timer(&console_timer, jiffies + (blankinterval * HZ)); 3847 blank_state = blank_normal_wait; 3848 } 3849 } 3850 3851 /* 3852 * Palettes 3853 */ 3854 3855 static void set_palette(struct vc_data *vc) 3856 { 3857 WARN_CONSOLE_UNLOCKED(); 3858 3859 if (vc->vc_mode != KD_GRAPHICS) 3860 vc->vc_sw->con_set_palette(vc, color_table); 3861 } 3862 3863 /* 3864 * Load palette into the DAC registers. arg points to a colour 3865 * map, 3 bytes per colour, 16 colours, range from 0 to 255. 3866 */ 3867 3868 int con_set_cmap(unsigned char __user *arg) 3869 { 3870 int i, j, k; 3871 unsigned char colormap[3*16]; 3872 3873 if (copy_from_user(colormap, arg, sizeof(colormap))) 3874 return -EFAULT; 3875 3876 console_lock(); 3877 for (i = k = 0; i < 16; i++) { 3878 default_red[i] = colormap[k++]; 3879 default_grn[i] = colormap[k++]; 3880 default_blu[i] = colormap[k++]; 3881 } 3882 for (i = 0; i < MAX_NR_CONSOLES; i++) { 3883 if (!vc_cons_allocated(i)) 3884 continue; 3885 for (j = k = 0; j < 16; j++) { 3886 vc_cons[i].d->vc_palette[k++] = default_red[j]; 3887 vc_cons[i].d->vc_palette[k++] = default_grn[j]; 3888 vc_cons[i].d->vc_palette[k++] = default_blu[j]; 3889 } 3890 set_palette(vc_cons[i].d); 3891 } 3892 console_unlock(); 3893 3894 return 0; 3895 } 3896 3897 int con_get_cmap(unsigned char __user *arg) 3898 { 3899 int i, k; 3900 unsigned char colormap[3*16]; 3901 3902 console_lock(); 3903 for (i = k = 0; i < 16; i++) { 3904 colormap[k++] = default_red[i]; 3905 colormap[k++] = default_grn[i]; 3906 colormap[k++] = default_blu[i]; 3907 } 3908 console_unlock(); 3909 3910 if (copy_to_user(arg, colormap, sizeof(colormap))) 3911 return -EFAULT; 3912 3913 return 0; 3914 } 3915 3916 void reset_palette(struct vc_data *vc) 3917 { 3918 int j, k; 3919 for (j=k=0; j<16; j++) { 3920 vc->vc_palette[k++] = default_red[j]; 3921 vc->vc_palette[k++] = default_grn[j]; 3922 vc->vc_palette[k++] = default_blu[j]; 3923 } 3924 set_palette(vc); 3925 } 3926 3927 /* 3928 * Font switching 3929 * 3930 * Currently we only support fonts up to 32 pixels wide, at a maximum height 3931 * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints, 3932 * depending on width) reserved for each character which is kinda wasty, but 3933 * this is done in order to maintain compatibility with the EGA/VGA fonts. It 3934 * is up to the actual low-level console-driver convert data into its favorite 3935 * format (maybe we should add a `fontoffset' field to the `display' 3936 * structure so we won't have to convert the fontdata all the time. 3937 * /Jes 3938 */ 3939 3940 #define max_font_size 65536 3941 3942 static int con_font_get(struct vc_data *vc, struct console_font_op *op) 3943 { 3944 struct console_font font; 3945 int rc = -EINVAL; 3946 int c; 3947 3948 if (op->data) { 3949 font.data = kmalloc(max_font_size, GFP_KERNEL); 3950 if (!font.data) 3951 return -ENOMEM; 3952 } else 3953 font.data = NULL; 3954 3955 console_lock(); 3956 if (vc->vc_mode != KD_TEXT) 3957 rc = -EINVAL; 3958 else if (vc->vc_sw->con_font_get) 3959 rc = vc->vc_sw->con_font_get(vc, &font); 3960 else 3961 rc = -ENOSYS; 3962 console_unlock(); 3963 3964 if (rc) 3965 goto out; 3966 3967 c = (font.width+7)/8 * 32 * font.charcount; 3968 3969 if (op->data && font.charcount > op->charcount) 3970 rc = -ENOSPC; 3971 if (!(op->flags & KD_FONT_FLAG_OLD)) { 3972 if (font.width > op->width || font.height > op->height) 3973 rc = -ENOSPC; 3974 } else { 3975 if (font.width != 8) 3976 rc = -EIO; 3977 else if ((op->height && font.height > op->height) || 3978 font.height > 32) 3979 rc = -ENOSPC; 3980 } 3981 if (rc) 3982 goto out; 3983 3984 op->height = font.height; 3985 op->width = font.width; 3986 op->charcount = font.charcount; 3987 3988 if (op->data && copy_to_user(op->data, font.data, c)) 3989 rc = -EFAULT; 3990 3991 out: 3992 kfree(font.data); 3993 return rc; 3994 } 3995 3996 static int con_font_set(struct vc_data *vc, struct console_font_op *op) 3997 { 3998 struct console_font font; 3999 int rc = -EINVAL; 4000 int size; 4001 4002 if (vc->vc_mode != KD_TEXT) 4003 return -EINVAL; 4004 if (!op->data) 4005 return -EINVAL; 4006 if (op->charcount > 512) 4007 return -EINVAL; 4008 if (!op->height) { /* Need to guess font height [compat] */ 4009 int h, i; 4010 u8 __user *charmap = op->data; 4011 u8 tmp; 4012 4013 /* If from KDFONTOP ioctl, don't allow things which can be done in userland, 4014 so that we can get rid of this soon */ 4015 if (!(op->flags & KD_FONT_FLAG_OLD)) 4016 return -EINVAL; 4017 for (h = 32; h > 0; h--) 4018 for (i = 0; i < op->charcount; i++) { 4019 if (get_user(tmp, &charmap[32*i+h-1])) 4020 return -EFAULT; 4021 if (tmp) 4022 goto nonzero; 4023 } 4024 return -EINVAL; 4025 nonzero: 4026 op->height = h; 4027 } 4028 if (op->width <= 0 || op->width > 32 || op->height > 32) 4029 return -EINVAL; 4030 size = (op->width+7)/8 * 32 * op->charcount; 4031 if (size > max_font_size) 4032 return -ENOSPC; 4033 font.charcount = op->charcount; 4034 font.height = op->height; 4035 font.width = op->width; 4036 font.data = memdup_user(op->data, size); 4037 if (IS_ERR(font.data)) 4038 return PTR_ERR(font.data); 4039 console_lock(); 4040 if (vc->vc_mode != KD_TEXT) 4041 rc = -EINVAL; 4042 else if (vc->vc_sw->con_font_set) 4043 rc = vc->vc_sw->con_font_set(vc, &font, op->flags); 4044 else 4045 rc = -ENOSYS; 4046 console_unlock(); 4047 kfree(font.data); 4048 return rc; 4049 } 4050 4051 static int con_font_default(struct vc_data *vc, struct console_font_op *op) 4052 { 4053 struct console_font font = {.width = op->width, .height = op->height}; 4054 char name[MAX_FONT_NAME]; 4055 char *s = name; 4056 int rc; 4057 4058 4059 if (!op->data) 4060 s = NULL; 4061 else if (strncpy_from_user(name, op->data, MAX_FONT_NAME - 1) < 0) 4062 return -EFAULT; 4063 else 4064 name[MAX_FONT_NAME - 1] = 0; 4065 4066 console_lock(); 4067 if (vc->vc_mode != KD_TEXT) { 4068 console_unlock(); 4069 return -EINVAL; 4070 } 4071 if (vc->vc_sw->con_font_default) 4072 rc = vc->vc_sw->con_font_default(vc, &font, s); 4073 else 4074 rc = -ENOSYS; 4075 console_unlock(); 4076 if (!rc) { 4077 op->width = font.width; 4078 op->height = font.height; 4079 } 4080 return rc; 4081 } 4082 4083 static int con_font_copy(struct vc_data *vc, struct console_font_op *op) 4084 { 4085 int con = op->height; 4086 int rc; 4087 4088 4089 console_lock(); 4090 if (vc->vc_mode != KD_TEXT) 4091 rc = -EINVAL; 4092 else if (!vc->vc_sw->con_font_copy) 4093 rc = -ENOSYS; 4094 else if (con < 0 || !vc_cons_allocated(con)) 4095 rc = -ENOTTY; 4096 else if (con == vc->vc_num) /* nothing to do */ 4097 rc = 0; 4098 else 4099 rc = vc->vc_sw->con_font_copy(vc, con); 4100 console_unlock(); 4101 return rc; 4102 } 4103 4104 int con_font_op(struct vc_data *vc, struct console_font_op *op) 4105 { 4106 switch (op->op) { 4107 case KD_FONT_OP_SET: 4108 return con_font_set(vc, op); 4109 case KD_FONT_OP_GET: 4110 return con_font_get(vc, op); 4111 case KD_FONT_OP_SET_DEFAULT: 4112 return con_font_default(vc, op); 4113 case KD_FONT_OP_COPY: 4114 return con_font_copy(vc, op); 4115 } 4116 return -ENOSYS; 4117 } 4118 4119 /* 4120 * Interface exported to selection and vcs. 4121 */ 4122 4123 /* used by selection */ 4124 u16 screen_glyph(struct vc_data *vc, int offset) 4125 { 4126 u16 w = scr_readw(screenpos(vc, offset, 1)); 4127 u16 c = w & 0xff; 4128 4129 if (w & vc->vc_hi_font_mask) 4130 c |= 0x100; 4131 return c; 4132 } 4133 EXPORT_SYMBOL_GPL(screen_glyph); 4134 4135 /* used by vcs - note the word offset */ 4136 unsigned short *screen_pos(struct vc_data *vc, int w_offset, int viewed) 4137 { 4138 return screenpos(vc, 2 * w_offset, viewed); 4139 } 4140 4141 void getconsxy(struct vc_data *vc, unsigned char *p) 4142 { 4143 p[0] = vc->vc_x; 4144 p[1] = vc->vc_y; 4145 } 4146 4147 void putconsxy(struct vc_data *vc, unsigned char *p) 4148 { 4149 hide_cursor(vc); 4150 gotoxy(vc, p[0], p[1]); 4151 set_cursor(vc); 4152 } 4153 4154 u16 vcs_scr_readw(struct vc_data *vc, const u16 *org) 4155 { 4156 if ((unsigned long)org == vc->vc_pos && softcursor_original != -1) 4157 return softcursor_original; 4158 return scr_readw(org); 4159 } 4160 4161 void vcs_scr_writew(struct vc_data *vc, u16 val, u16 *org) 4162 { 4163 scr_writew(val, org); 4164 if ((unsigned long)org == vc->vc_pos) { 4165 softcursor_original = -1; 4166 add_softcursor(vc); 4167 } 4168 } 4169 4170 void vcs_scr_updated(struct vc_data *vc) 4171 { 4172 notify_update(vc); 4173 } 4174 4175 /* 4176 * Visible symbols for modules 4177 */ 4178 4179 EXPORT_SYMBOL(color_table); 4180 EXPORT_SYMBOL(default_red); 4181 EXPORT_SYMBOL(default_grn); 4182 EXPORT_SYMBOL(default_blu); 4183 EXPORT_SYMBOL(update_region); 4184 EXPORT_SYMBOL(redraw_screen); 4185 EXPORT_SYMBOL(vc_resize); 4186 EXPORT_SYMBOL(fg_console); 4187 EXPORT_SYMBOL(console_blank_hook); 4188 EXPORT_SYMBOL(console_blanked); 4189 EXPORT_SYMBOL(vc_cons); 4190 EXPORT_SYMBOL(global_cursor_default); 4191 #ifndef VT_SINGLE_DRIVER 4192 EXPORT_SYMBOL(give_up_console); 4193 #endif 4194