1/* 2 * linux/drivers/char/vt.c 3 * 4 * Copyright (C) 1991, 1992 Linus Torvalds 5 */ 6 7/* 8 * Hopefully this will be a rather complete VT102 implementation. 9 * 10 * Beeping thanks to John T Kohl. 11 * 12 * Virtual Consoles, Screen Blanking, Screen Dumping, Color, Graphics 13 * Chars, and VT100 enhancements by Peter MacDonald. 14 * 15 * Copy and paste function by Andrew Haylett, 16 * some enhancements by Alessandro Rubini. 17 * 18 * Code to check for different video-cards mostly by Galen Hunt, 19 * <g-hunt@ee.utah.edu> 20 * 21 * Rudimentary ISO 10646/Unicode/UTF-8 character set support by 22 * Markus Kuhn, <mskuhn@immd4.informatik.uni-erlangen.de>. 23 * 24 * Dynamic allocation of consoles, aeb@cwi.nl, May 1994 25 * Resizing of consoles, aeb, 940926 26 * 27 * Code for xterm like mouse click reporting by Peter Orbaek 20-Jul-94 28 * <poe@daimi.aau.dk> 29 * 30 * User-defined bell sound, new setterm control sequences and printk 31 * redirection by Martin Mares <mj@k332.feld.cvut.cz> 19-Nov-95 32 * 33 * APM screenblank bug fixed Takashi Manabe <manabe@roy.dsl.tutics.tut.jp> 34 * 35 * Merge with the abstract console driver by Geert Uytterhoeven 36 * <geert@linux-m68k.org>, Jan 1997. 37 * 38 * Original m68k console driver modifications by 39 * 40 * - Arno Griffioen <arno@usn.nl> 41 * - David Carter <carter@cs.bris.ac.uk> 42 * 43 * The abstract console driver provides a generic interface for a text 44 * console. It supports VGA text mode, frame buffer based graphical consoles 45 * and special graphics processors that are only accessible through some 46 * registers (e.g. a TMS340x0 GSP). 47 * 48 * The interface to the hardware is specified using a special structure 49 * (struct consw) which contains function pointers to console operations 50 * (see <linux/console.h> for more information). 51 * 52 * Support for changeable cursor shape 53 * by Pavel Machek <pavel@atrey.karlin.mff.cuni.cz>, August 1997 54 * 55 * Ported to i386 and con_scrolldelta fixed 56 * by Emmanuel Marty <core@ggi-project.org>, April 1998 57 * 58 * Resurrected character buffers in videoram plus lots of other trickery 59 * by Martin Mares <mj@atrey.karlin.mff.cuni.cz>, July 1998 60 * 61 * Removed old-style timers, introduced console_timer, made timer 62 * deletion SMP-safe. 17Jun00, Andrew Morton 63 * 64 * Removed console_lock, enabled interrupts across all console operations 65 * 13 March 2001, Andrew Morton 66 * 67 * Fixed UTF-8 mode so alternate charset modes always work according 68 * to control sequences interpreted in do_con_trol function 69 * preserving backward VT100 semigraphics compatibility, 70 * malformed UTF sequences represented as sequences of replacement glyphs, 71 * original codes or '?' as a last resort if replacement glyph is undefined 72 * by Adam Tla/lka <atlka@pg.gda.pl>, Aug 2006 73 */ 74 75#include <linux/module.h> 76#include <linux/types.h> 77#include <linux/sched.h> 78#include <linux/tty.h> 79#include <linux/tty_flip.h> 80#include <linux/kernel.h> 81#include <linux/string.h> 82#include <linux/errno.h> 83#include <linux/kd.h> 84#include <linux/slab.h> 85#include <linux/major.h> 86#include <linux/mm.h> 87#include <linux/console.h> 88#include <linux/init.h> 89#include <linux/mutex.h> 90#include <linux/vt_kern.h> 91#include <linux/selection.h> 92#include <linux/smp_lock.h> 93#include <linux/tiocl.h> 94#include <linux/kbd_kern.h> 95#include <linux/consolemap.h> 96#include <linux/timer.h> 97#include <linux/interrupt.h> 98#include <linux/workqueue.h> 99#include <linux/pm.h> 100#include <linux/font.h> 101#include <linux/bitops.h> 102#include <linux/notifier.h> 103#include <linux/device.h> 104#include <linux/io.h> 105#include <asm/system.h> 106#include <linux/uaccess.h> 107#include <linux/kdb.h> 108#include <linux/ctype.h> 109 110#define MAX_NR_CON_DRIVER 16 111 112#define CON_DRIVER_FLAG_MODULE 1 113#define CON_DRIVER_FLAG_INIT 2 114#define CON_DRIVER_FLAG_ATTR 4 115 116struct con_driver { 117 const struct consw *con; 118 const char *desc; 119 struct device *dev; 120 int node; 121 int first; 122 int last; 123 int flag; 124}; 125 126static struct con_driver registered_con_driver[MAX_NR_CON_DRIVER]; 127const struct consw *conswitchp; 128 129/* A bitmap for codes <32. A bit of 1 indicates that the code 130 * corresponding to that bit number invokes some special action 131 * (such as cursor movement) and should not be displayed as a 132 * glyph unless the disp_ctrl mode is explicitly enabled. 133 */ 134#define CTRL_ACTION 0x0d00ff81 135#define CTRL_ALWAYS 0x0800f501 /* Cannot be overridden by disp_ctrl */ 136 137/* 138 * Here is the default bell parameters: 750HZ, 1/8th of a second 139 */ 140#define DEFAULT_BELL_PITCH 750 141#define DEFAULT_BELL_DURATION (HZ/8) 142 143struct vc vc_cons [MAX_NR_CONSOLES]; 144 145#ifndef VT_SINGLE_DRIVER 146static const struct consw *con_driver_map[MAX_NR_CONSOLES]; 147#endif 148 149static int con_open(struct tty_struct *, struct file *); 150static void vc_init(struct vc_data *vc, unsigned int rows, 151 unsigned int cols, int do_clear); 152static void gotoxy(struct vc_data *vc, int new_x, int new_y); 153static void save_cur(struct vc_data *vc); 154static void reset_terminal(struct vc_data *vc, int do_clear); 155static void con_flush_chars(struct tty_struct *tty); 156static int set_vesa_blanking(char __user *p); 157static void set_cursor(struct vc_data *vc); 158static void hide_cursor(struct vc_data *vc); 159static void console_callback(struct work_struct *ignored); 160static void blank_screen_t(unsigned long dummy); 161static void set_palette(struct vc_data *vc); 162 163static int printable; /* Is console ready for printing? */ 164int default_utf8 = true; 165module_param(default_utf8, int, S_IRUGO | S_IWUSR); 166int global_cursor_default = -1; 167module_param(global_cursor_default, int, S_IRUGO | S_IWUSR); 168 169static int cur_default = CUR_DEFAULT; 170module_param(cur_default, int, S_IRUGO | S_IWUSR); 171 172/* 173 * ignore_poke: don't unblank the screen when things are typed. This is 174 * mainly for the privacy of braille terminal users. 175 */ 176static int ignore_poke; 177 178int do_poke_blanked_console; 179int console_blanked; 180 181static int vesa_blank_mode; /* 0:none 1:suspendV 2:suspendH 3:powerdown */ 182static int vesa_off_interval; 183static int blankinterval = 10*60; 184core_param(consoleblank, blankinterval, int, 0444); 185 186static DECLARE_WORK(console_work, console_callback); 187 188/* 189 * fg_console is the current virtual console, 190 * last_console is the last used one, 191 * want_console is the console we want to switch to, 192 * saved_* variants are for save/restore around kernel debugger enter/leave 193 */ 194int fg_console; 195int last_console; 196int want_console = -1; 197static int saved_fg_console; 198static int saved_last_console; 199static int saved_want_console; 200static int saved_vc_mode; 201static int saved_console_blanked; 202 203/* 204 * For each existing display, we have a pointer to console currently visible 205 * on that display, allowing consoles other than fg_console to be refreshed 206 * appropriately. Unless the low-level driver supplies its own display_fg 207 * variable, we use this one for the "master display". 208 */ 209static struct vc_data *master_display_fg; 210 211/* 212 * Unfortunately, we need to delay tty echo when we're currently writing to the 213 * console since the code is (and always was) not re-entrant, so we schedule 214 * all flip requests to process context with schedule-task() and run it from 215 * console_callback(). 216 */ 217 218/* 219 * For the same reason, we defer scrollback to the console callback. 220 */ 221static int scrollback_delta; 222 223/* 224 * Hook so that the power management routines can (un)blank 225 * the console on our behalf. 226 */ 227int (*console_blank_hook)(int); 228 229static DEFINE_TIMER(console_timer, blank_screen_t, 0, 0); 230static int blank_state; 231static int blank_timer_expired; 232enum { 233 blank_off = 0, 234 blank_normal_wait, 235 blank_vesa_wait, 236}; 237 238/* 239 * Notifier list for console events. 240 */ 241static ATOMIC_NOTIFIER_HEAD(vt_notifier_list); 242 243int register_vt_notifier(struct notifier_block *nb) 244{ 245 return atomic_notifier_chain_register(&vt_notifier_list, nb); 246} 247EXPORT_SYMBOL_GPL(register_vt_notifier); 248 249int unregister_vt_notifier(struct notifier_block *nb) 250{ 251 return atomic_notifier_chain_unregister(&vt_notifier_list, nb); 252} 253EXPORT_SYMBOL_GPL(unregister_vt_notifier); 254 255static void notify_write(struct vc_data *vc, unsigned int unicode) 256{ 257 struct vt_notifier_param param = { .vc = vc, unicode = unicode }; 258 atomic_notifier_call_chain(&vt_notifier_list, VT_WRITE, ¶m); 259} 260 261static void notify_update(struct vc_data *vc) 262{ 263 struct vt_notifier_param param = { .vc = vc }; 264 atomic_notifier_call_chain(&vt_notifier_list, VT_UPDATE, ¶m); 265} 266/* 267 * Low-Level Functions 268 */ 269 270#define IS_FG(vc) ((vc)->vc_num == fg_console) 271 272#ifdef VT_BUF_VRAM_ONLY 273#define DO_UPDATE(vc) 0 274#else 275#define DO_UPDATE(vc) (CON_IS_VISIBLE(vc) && !console_blanked) 276#endif 277 278static inline unsigned short *screenpos(struct vc_data *vc, int offset, int viewed) 279{ 280 unsigned short *p; 281 282 if (!viewed) 283 p = (unsigned short *)(vc->vc_origin + offset); 284 else if (!vc->vc_sw->con_screen_pos) 285 p = (unsigned short *)(vc->vc_visible_origin + offset); 286 else 287 p = vc->vc_sw->con_screen_pos(vc, offset); 288 return p; 289} 290 291/* Called from the keyboard irq path.. */ 292static inline void scrolldelta(int lines) 293{ 294 /* scrolldelta needs some kind of consistency lock, but the BKL was 295 and still is not protecting versus the scheduled back end */ 296 scrollback_delta += lines; 297 schedule_console_callback(); 298} 299 300void schedule_console_callback(void) 301{ 302 schedule_work(&console_work); 303} 304 305static void scrup(struct vc_data *vc, unsigned int t, unsigned int b, int nr) 306{ 307 unsigned short *d, *s; 308 309 if (t+nr >= b) 310 nr = b - t - 1; 311 if (b > vc->vc_rows || t >= b || nr < 1) 312 return; 313 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_UP, nr)) 314 return; 315 d = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t); 316 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * (t + nr)); 317 scr_memmovew(d, s, (b - t - nr) * vc->vc_size_row); 318 scr_memsetw(d + (b - t - nr) * vc->vc_cols, vc->vc_video_erase_char, 319 vc->vc_size_row * nr); 320} 321 322static void scrdown(struct vc_data *vc, unsigned int t, unsigned int b, int nr) 323{ 324 unsigned short *s; 325 unsigned int step; 326 327 if (t+nr >= b) 328 nr = b - t - 1; 329 if (b > vc->vc_rows || t >= b || nr < 1) 330 return; 331 if (CON_IS_VISIBLE(vc) && vc->vc_sw->con_scroll(vc, t, b, SM_DOWN, nr)) 332 return; 333 s = (unsigned short *)(vc->vc_origin + vc->vc_size_row * t); 334 step = vc->vc_cols * nr; 335 scr_memmovew(s + step, s, (b - t - nr) * vc->vc_size_row); 336 scr_memsetw(s, vc->vc_video_erase_char, 2 * step); 337} 338 339static void do_update_region(struct vc_data *vc, unsigned long start, int count) 340{ 341#ifndef VT_BUF_VRAM_ONLY 342 unsigned int xx, yy, offset; 343 u16 *p; 344 345 p = (u16 *) start; 346 if (!vc->vc_sw->con_getxy) { 347 offset = (start - vc->vc_origin) / 2; 348 xx = offset % vc->vc_cols; 349 yy = offset / vc->vc_cols; 350 } else { 351 int nxx, nyy; 352 start = vc->vc_sw->con_getxy(vc, start, &nxx, &nyy); 353 xx = nxx; yy = nyy; 354 } 355 for(;;) { 356 u16 attrib = scr_readw(p) & 0xff00; 357 int startx = xx; 358 u16 *q = p; 359 while (xx < vc->vc_cols && count) { 360 if (attrib != (scr_readw(p) & 0xff00)) { 361 if (p > q) 362 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx); 363 startx = xx; 364 q = p; 365 attrib = scr_readw(p) & 0xff00; 366 } 367 p++; 368 xx++; 369 count--; 370 } 371 if (p > q) 372 vc->vc_sw->con_putcs(vc, q, p-q, yy, startx); 373 if (!count) 374 break; 375 xx = 0; 376 yy++; 377 if (vc->vc_sw->con_getxy) { 378 p = (u16 *)start; 379 start = vc->vc_sw->con_getxy(vc, start, NULL, NULL); 380 } 381 } 382#endif 383} 384 385void update_region(struct vc_data *vc, unsigned long start, int count) 386{ 387 WARN_CONSOLE_UNLOCKED(); 388 389 if (DO_UPDATE(vc)) { 390 hide_cursor(vc); 391 do_update_region(vc, start, count); 392 set_cursor(vc); 393 } 394} 395 396/* Structure of attributes is hardware-dependent */ 397 398static u8 build_attr(struct vc_data *vc, u8 _color, u8 _intensity, u8 _blink, 399 u8 _underline, u8 _reverse, u8 _italic) 400{ 401 if (vc->vc_sw->con_build_attr) 402 return vc->vc_sw->con_build_attr(vc, _color, _intensity, 403 _blink, _underline, _reverse, _italic); 404 405#ifndef VT_BUF_VRAM_ONLY 406/* 407 * ++roman: I completely changed the attribute format for monochrome 408 * mode (!can_do_color). The formerly used MDA (monochrome display 409 * adapter) format didn't allow the combination of certain effects. 410 * Now the attribute is just a bit vector: 411 * Bit 0..1: intensity (0..2) 412 * Bit 2 : underline 413 * Bit 3 : reverse 414 * Bit 7 : blink 415 */ 416 { 417 u8 a = _color; 418 if (!vc->vc_can_do_color) 419 return _intensity | 420 (_italic ? 2 : 0) | 421 (_underline ? 4 : 0) | 422 (_reverse ? 8 : 0) | 423 (_blink ? 0x80 : 0); 424 if (_italic) 425 a = (a & 0xF0) | vc->vc_itcolor; 426 else if (_underline) 427 a = (a & 0xf0) | vc->vc_ulcolor; 428 else if (_intensity == 0) 429 a = (a & 0xf0) | vc->vc_ulcolor; 430 if (_reverse) 431 a = ((a) & 0x88) | ((((a) >> 4) | ((a) << 4)) & 0x77); 432 if (_blink) 433 a ^= 0x80; 434 if (_intensity == 2) 435 a ^= 0x08; 436 if (vc->vc_hi_font_mask == 0x100) 437 a <<= 1; 438 return a; 439 } 440#else 441 return 0; 442#endif 443} 444 445static void update_attr(struct vc_data *vc) 446{ 447 vc->vc_attr = build_attr(vc, vc->vc_color, vc->vc_intensity, 448 vc->vc_blink, vc->vc_underline, 449 vc->vc_reverse ^ vc->vc_decscnm, vc->vc_italic); 450 vc->vc_video_erase_char = (build_attr(vc, vc->vc_color, 1, vc->vc_blink, 0, vc->vc_decscnm, 0) << 8) | ' '; 451} 452 453/* Note: inverting the screen twice should revert to the original state */ 454void invert_screen(struct vc_data *vc, int offset, int count, int viewed) 455{ 456 unsigned short *p; 457 458 WARN_CONSOLE_UNLOCKED(); 459 460 count /= 2; 461 p = screenpos(vc, offset, viewed); 462 if (vc->vc_sw->con_invert_region) 463 vc->vc_sw->con_invert_region(vc, p, count); 464#ifndef VT_BUF_VRAM_ONLY 465 else { 466 u16 *q = p; 467 int cnt = count; 468 u16 a; 469 470 if (!vc->vc_can_do_color) { 471 while (cnt--) { 472 a = scr_readw(q); 473 a ^= 0x0800; 474 scr_writew(a, q); 475 q++; 476 } 477 } else if (vc->vc_hi_font_mask == 0x100) { 478 while (cnt--) { 479 a = scr_readw(q); 480 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) | (((a) & 0x0e00) << 4); 481 scr_writew(a, q); 482 q++; 483 } 484 } else { 485 while (cnt--) { 486 a = scr_readw(q); 487 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | (((a) & 0x0700) << 4); 488 scr_writew(a, q); 489 q++; 490 } 491 } 492 } 493#endif 494 if (DO_UPDATE(vc)) 495 do_update_region(vc, (unsigned long) p, count); 496} 497 498/* used by selection: complement pointer position */ 499void complement_pos(struct vc_data *vc, int offset) 500{ 501 static int old_offset = -1; 502 static unsigned short old; 503 static unsigned short oldx, oldy; 504 505 WARN_CONSOLE_UNLOCKED(); 506 507 if (old_offset != -1 && old_offset >= 0 && 508 old_offset < vc->vc_screenbuf_size) { 509 scr_writew(old, screenpos(vc, old_offset, 1)); 510 if (DO_UPDATE(vc)) 511 vc->vc_sw->con_putc(vc, old, oldy, oldx); 512 } 513 514 old_offset = offset; 515 516 if (offset != -1 && offset >= 0 && 517 offset < vc->vc_screenbuf_size) { 518 unsigned short new; 519 unsigned short *p; 520 p = screenpos(vc, offset, 1); 521 old = scr_readw(p); 522 new = old ^ vc->vc_complement_mask; 523 scr_writew(new, p); 524 if (DO_UPDATE(vc)) { 525 oldx = (offset >> 1) % vc->vc_cols; 526 oldy = (offset >> 1) / vc->vc_cols; 527 vc->vc_sw->con_putc(vc, new, oldy, oldx); 528 } 529 } 530 531} 532 533static void insert_char(struct vc_data *vc, unsigned int nr) 534{ 535 unsigned short *p, *q = (unsigned short *)vc->vc_pos; 536 537 p = q + vc->vc_cols - nr - vc->vc_x; 538 while (--p >= q) 539 scr_writew(scr_readw(p), p + nr); 540 scr_memsetw(q, vc->vc_video_erase_char, nr * 2); 541 vc->vc_need_wrap = 0; 542 if (DO_UPDATE(vc)) { 543 unsigned short oldattr = vc->vc_attr; 544 vc->vc_sw->con_bmove(vc, vc->vc_y, vc->vc_x, vc->vc_y, vc->vc_x + nr, 1, 545 vc->vc_cols - vc->vc_x - nr); 546 vc->vc_attr = vc->vc_video_erase_char >> 8; 547 while (nr--) 548 vc->vc_sw->con_putc(vc, vc->vc_video_erase_char, vc->vc_y, vc->vc_x + nr); 549 vc->vc_attr = oldattr; 550 } 551} 552 553static void delete_char(struct vc_data *vc, unsigned int nr) 554{ 555 unsigned int i = vc->vc_x; 556 unsigned short *p = (unsigned short *)vc->vc_pos; 557 558 while (++i <= vc->vc_cols - nr) { 559 scr_writew(scr_readw(p+nr), p); 560 p++; 561 } 562 scr_memsetw(p, vc->vc_video_erase_char, nr * 2); 563 vc->vc_need_wrap = 0; 564 if (DO_UPDATE(vc)) { 565 unsigned short oldattr = vc->vc_attr; 566 vc->vc_sw->con_bmove(vc, vc->vc_y, vc->vc_x + nr, vc->vc_y, vc->vc_x, 1, 567 vc->vc_cols - vc->vc_x - nr); 568 vc->vc_attr = vc->vc_video_erase_char >> 8; 569 while (nr--) 570 vc->vc_sw->con_putc(vc, vc->vc_video_erase_char, vc->vc_y, 571 vc->vc_cols - 1 - nr); 572 vc->vc_attr = oldattr; 573 } 574} 575 576static int softcursor_original; 577 578static void add_softcursor(struct vc_data *vc) 579{ 580 int i = scr_readw((u16 *) vc->vc_pos); 581 u32 type = vc->vc_cursor_type; 582 583 if (! (type & 0x10)) return; 584 if (softcursor_original != -1) return; 585 softcursor_original = i; 586 i |= ((type >> 8) & 0xff00 ); 587 i ^= ((type) & 0xff00 ); 588 if ((type & 0x20) && ((softcursor_original & 0x7000) == (i & 0x7000))) i ^= 0x7000; 589 if ((type & 0x40) && ((i & 0x700) == ((i & 0x7000) >> 4))) i ^= 0x0700; 590 scr_writew(i, (u16 *) vc->vc_pos); 591 if (DO_UPDATE(vc)) 592 vc->vc_sw->con_putc(vc, i, vc->vc_y, vc->vc_x); 593} 594 595static void hide_softcursor(struct vc_data *vc) 596{ 597 if (softcursor_original != -1) { 598 scr_writew(softcursor_original, (u16 *)vc->vc_pos); 599 if (DO_UPDATE(vc)) 600 vc->vc_sw->con_putc(vc, softcursor_original, 601 vc->vc_y, vc->vc_x); 602 softcursor_original = -1; 603 } 604} 605 606static void hide_cursor(struct vc_data *vc) 607{ 608 if (vc == sel_cons) 609 clear_selection(); 610 vc->vc_sw->con_cursor(vc, CM_ERASE); 611 hide_softcursor(vc); 612} 613 614static void set_cursor(struct vc_data *vc) 615{ 616 if (!IS_FG(vc) || console_blanked || 617 vc->vc_mode == KD_GRAPHICS) 618 return; 619 if (vc->vc_deccm) { 620 if (vc == sel_cons) 621 clear_selection(); 622 add_softcursor(vc); 623 if ((vc->vc_cursor_type & 0x0f) != 1) 624 vc->vc_sw->con_cursor(vc, CM_DRAW); 625 } else 626 hide_cursor(vc); 627} 628 629static void set_origin(struct vc_data *vc) 630{ 631 WARN_CONSOLE_UNLOCKED(); 632 633 if (!CON_IS_VISIBLE(vc) || 634 !vc->vc_sw->con_set_origin || 635 !vc->vc_sw->con_set_origin(vc)) 636 vc->vc_origin = (unsigned long)vc->vc_screenbuf; 637 vc->vc_visible_origin = vc->vc_origin; 638 vc->vc_scr_end = vc->vc_origin + vc->vc_screenbuf_size; 639 vc->vc_pos = vc->vc_origin + vc->vc_size_row * vc->vc_y + 2 * vc->vc_x; 640} 641 642static inline void save_screen(struct vc_data *vc) 643{ 644 WARN_CONSOLE_UNLOCKED(); 645 646 if (vc->vc_sw->con_save_screen) 647 vc->vc_sw->con_save_screen(vc); 648} 649 650/* 651 * Redrawing of screen 652 */ 653 654static void clear_buffer_attributes(struct vc_data *vc) 655{ 656 unsigned short *p = (unsigned short *)vc->vc_origin; 657 int count = vc->vc_screenbuf_size / 2; 658 int mask = vc->vc_hi_font_mask | 0xff; 659 660 for (; count > 0; count--, p++) { 661 scr_writew((scr_readw(p)&mask) | (vc->vc_video_erase_char & ~mask), p); 662 } 663} 664 665void redraw_screen(struct vc_data *vc, int is_switch) 666{ 667 int redraw = 0; 668 669 WARN_CONSOLE_UNLOCKED(); 670 671 if (!vc) { 672 /* strange ... */ 673 /* printk("redraw_screen: tty %d not allocated ??\n", new_console+1); */ 674 return; 675 } 676 677 if (is_switch) { 678 struct vc_data *old_vc = vc_cons[fg_console].d; 679 if (old_vc == vc) 680 return; 681 if (!CON_IS_VISIBLE(vc)) 682 redraw = 1; 683 *vc->vc_display_fg = vc; 684 fg_console = vc->vc_num; 685 hide_cursor(old_vc); 686 if (!CON_IS_VISIBLE(old_vc)) { 687 save_screen(old_vc); 688 set_origin(old_vc); 689 } 690 } else { 691 hide_cursor(vc); 692 redraw = 1; 693 } 694 695 if (redraw) { 696 int update; 697 int old_was_color = vc->vc_can_do_color; 698 699 set_origin(vc); 700 update = vc->vc_sw->con_switch(vc); 701 set_palette(vc); 702 /* 703 * If console changed from mono<->color, the best we can do 704 * is to clear the buffer attributes. As it currently stands, 705 * rebuilding new attributes from the old buffer is not doable 706 * without overly complex code. 707 */ 708 if (old_was_color != vc->vc_can_do_color) { 709 update_attr(vc); 710 clear_buffer_attributes(vc); 711 } 712 713 /* Forcibly update if we're panicing */ 714 if ((update && vc->vc_mode != KD_GRAPHICS) || 715 vt_force_oops_output(vc)) 716 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2); 717 } 718 set_cursor(vc); 719 if (is_switch) { 720 set_leds(); 721 compute_shiftstate(); 722 notify_update(vc); 723 } 724} 725 726/* 727 * Allocation, freeing and resizing of VTs. 728 */ 729 730int vc_cons_allocated(unsigned int i) 731{ 732 return (i < MAX_NR_CONSOLES && vc_cons[i].d); 733} 734 735static void visual_init(struct vc_data *vc, int num, int init) 736{ 737 /* ++Geert: vc->vc_sw->con_init determines console size */ 738 if (vc->vc_sw) 739 module_put(vc->vc_sw->owner); 740 vc->vc_sw = conswitchp; 741#ifndef VT_SINGLE_DRIVER 742 if (con_driver_map[num]) 743 vc->vc_sw = con_driver_map[num]; 744#endif 745 __module_get(vc->vc_sw->owner); 746 vc->vc_num = num; 747 vc->vc_display_fg = &master_display_fg; 748 vc->vc_uni_pagedir_loc = &vc->vc_uni_pagedir; 749 vc->vc_uni_pagedir = 0; 750 vc->vc_hi_font_mask = 0; 751 vc->vc_complement_mask = 0; 752 vc->vc_can_do_color = 0; 753 vc->vc_panic_force_write = false; 754 vc->vc_sw->con_init(vc, init); 755 if (!vc->vc_complement_mask) 756 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800; 757 vc->vc_s_complement_mask = vc->vc_complement_mask; 758 vc->vc_size_row = vc->vc_cols << 1; 759 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row; 760} 761 762int vc_allocate(unsigned int currcons) /* return 0 on success */ 763{ 764 WARN_CONSOLE_UNLOCKED(); 765 766 if (currcons >= MAX_NR_CONSOLES) 767 return -ENXIO; 768 if (!vc_cons[currcons].d) { 769 struct vc_data *vc; 770 struct vt_notifier_param param; 771 772 /* prevent users from taking too much memory */ 773 if (currcons >= MAX_NR_USER_CONSOLES && !capable(CAP_SYS_RESOURCE)) 774 return -EPERM; 775 776 /* due to the granularity of kmalloc, we waste some memory here */ 777 /* the alloc is done in two steps, to optimize the common situation 778 of a 25x80 console (structsize=216, screenbuf_size=4000) */ 779 /* although the numbers above are not valid since long ago, the 780 point is still up-to-date and the comment still has its value 781 even if only as a historical artifact. --mj, July 1998 */ 782 param.vc = vc = kzalloc(sizeof(struct vc_data), GFP_KERNEL); 783 if (!vc) 784 return -ENOMEM; 785 vc_cons[currcons].d = vc; 786 tty_port_init(&vc->port); 787 INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK); 788 visual_init(vc, currcons, 1); 789 if (!*vc->vc_uni_pagedir_loc) 790 con_set_default_unimap(vc); 791 vc->vc_screenbuf = kmalloc(vc->vc_screenbuf_size, GFP_KERNEL); 792 if (!vc->vc_screenbuf) { 793 kfree(vc); 794 vc_cons[currcons].d = NULL; 795 return -ENOMEM; 796 } 797 798 /* If no drivers have overridden us and the user didn't pass a 799 boot option, default to displaying the cursor */ 800 if (global_cursor_default == -1) 801 global_cursor_default = 1; 802 803 vc_init(vc, vc->vc_rows, vc->vc_cols, 1); 804 vcs_make_sysfs(currcons); 805 atomic_notifier_call_chain(&vt_notifier_list, VT_ALLOCATE, ¶m); 806 } 807 return 0; 808} 809 810static inline int resize_screen(struct vc_data *vc, int width, int height, 811 int user) 812{ 813 /* Resizes the resolution of the display adapater */ 814 int err = 0; 815 816 if (vc->vc_mode != KD_GRAPHICS && vc->vc_sw->con_resize) 817 err = vc->vc_sw->con_resize(vc, width, height, user); 818 819 return err; 820} 821 822/* 823 * Change # of rows and columns (0 means unchanged/the size of fg_console) 824 * [this is to be used together with some user program 825 * like resize that changes the hardware videomode] 826 */ 827#define VC_RESIZE_MAXCOL (32767) 828#define VC_RESIZE_MAXROW (32767) 829 830/** 831 * vc_do_resize - resizing method for the tty 832 * @tty: tty being resized 833 * @real_tty: real tty (different to tty if a pty/tty pair) 834 * @vc: virtual console private data 835 * @cols: columns 836 * @lines: lines 837 * 838 * Resize a virtual console, clipping according to the actual constraints. 839 * If the caller passes a tty structure then update the termios winsize 840 * information and perform any necessary signal handling. 841 * 842 * Caller must hold the console semaphore. Takes the termios mutex and 843 * ctrl_lock of the tty IFF a tty is passed. 844 */ 845 846static int vc_do_resize(struct tty_struct *tty, struct vc_data *vc, 847 unsigned int cols, unsigned int lines) 848{ 849 unsigned long old_origin, new_origin, new_scr_end, rlth, rrem, err = 0; 850 unsigned long end; 851 unsigned int old_cols, old_rows, old_row_size, old_screen_size; 852 unsigned int new_cols, new_rows, new_row_size, new_screen_size; 853 unsigned int user; 854 unsigned short *newscreen; 855 856 WARN_CONSOLE_UNLOCKED(); 857 858 if (!vc) 859 return -ENXIO; 860 861 user = vc->vc_resize_user; 862 vc->vc_resize_user = 0; 863 864 if (cols > VC_RESIZE_MAXCOL || lines > VC_RESIZE_MAXROW) 865 return -EINVAL; 866 867 new_cols = (cols ? cols : vc->vc_cols); 868 new_rows = (lines ? lines : vc->vc_rows); 869 new_row_size = new_cols << 1; 870 new_screen_size = new_row_size * new_rows; 871 872 if (new_cols == vc->vc_cols && new_rows == vc->vc_rows) 873 return 0; 874 875 newscreen = kmalloc(new_screen_size, GFP_USER); 876 if (!newscreen) 877 return -ENOMEM; 878 879 old_rows = vc->vc_rows; 880 old_cols = vc->vc_cols; 881 old_row_size = vc->vc_size_row; 882 old_screen_size = vc->vc_screenbuf_size; 883 884 err = resize_screen(vc, new_cols, new_rows, user); 885 if (err) { 886 kfree(newscreen); 887 return err; 888 } 889 890 vc->vc_rows = new_rows; 891 vc->vc_cols = new_cols; 892 vc->vc_size_row = new_row_size; 893 vc->vc_screenbuf_size = new_screen_size; 894 895 rlth = min(old_row_size, new_row_size); 896 rrem = new_row_size - rlth; 897 old_origin = vc->vc_origin; 898 new_origin = (long) newscreen; 899 new_scr_end = new_origin + new_screen_size; 900 901 if (vc->vc_y > new_rows) { 902 if (old_rows - vc->vc_y < new_rows) { 903 /* 904 * Cursor near the bottom, copy contents from the 905 * bottom of buffer 906 */ 907 old_origin += (old_rows - new_rows) * old_row_size; 908 } else { 909 /* 910 * Cursor is in no man's land, copy 1/2 screenful 911 * from the top and bottom of cursor position 912 */ 913 old_origin += (vc->vc_y - new_rows/2) * old_row_size; 914 } 915 } 916 917 end = old_origin + old_row_size * min(old_rows, new_rows); 918 919 update_attr(vc); 920 921 while (old_origin < end) { 922 scr_memcpyw((unsigned short *) new_origin, 923 (unsigned short *) old_origin, rlth); 924 if (rrem) 925 scr_memsetw((void *)(new_origin + rlth), 926 vc->vc_video_erase_char, rrem); 927 old_origin += old_row_size; 928 new_origin += new_row_size; 929 } 930 if (new_scr_end > new_origin) 931 scr_memsetw((void *)new_origin, vc->vc_video_erase_char, 932 new_scr_end - new_origin); 933 kfree(vc->vc_screenbuf); 934 vc->vc_screenbuf = newscreen; 935 vc->vc_screenbuf_size = new_screen_size; 936 set_origin(vc); 937 938 /* do part of a reset_terminal() */ 939 vc->vc_top = 0; 940 vc->vc_bottom = vc->vc_rows; 941 gotoxy(vc, vc->vc_x, vc->vc_y); 942 save_cur(vc); 943 944 if (tty) { 945 /* Rewrite the requested winsize data with the actual 946 resulting sizes */ 947 struct winsize ws; 948 memset(&ws, 0, sizeof(ws)); 949 ws.ws_row = vc->vc_rows; 950 ws.ws_col = vc->vc_cols; 951 ws.ws_ypixel = vc->vc_scan_lines; 952 tty_do_resize(tty, &ws); 953 } 954 955 if (CON_IS_VISIBLE(vc)) 956 update_screen(vc); 957 vt_event_post(VT_EVENT_RESIZE, vc->vc_num, vc->vc_num); 958 return err; 959} 960 961/** 962 * vc_resize - resize a VT 963 * @vc: virtual console 964 * @cols: columns 965 * @rows: rows 966 * 967 * Resize a virtual console as seen from the console end of things. We 968 * use the common vc_do_resize methods to update the structures. The 969 * caller must hold the console sem to protect console internals and 970 * vc->port.tty 971 */ 972 973int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int rows) 974{ 975 return vc_do_resize(vc->port.tty, vc, cols, rows); 976} 977 978/** 979 * vt_resize - resize a VT 980 * @tty: tty to resize 981 * @ws: winsize attributes 982 * 983 * Resize a virtual terminal. This is called by the tty layer as we 984 * register our own handler for resizing. The mutual helper does all 985 * the actual work. 986 * 987 * Takes the console sem and the called methods then take the tty 988 * termios_mutex and the tty ctrl_lock in that order. 989 */ 990static int vt_resize(struct tty_struct *tty, struct winsize *ws) 991{ 992 struct vc_data *vc = tty->driver_data; 993 int ret; 994 995 acquire_console_sem(); 996 ret = vc_do_resize(tty, vc, ws->ws_col, ws->ws_row); 997 release_console_sem(); 998 return ret; 999} 1000 1001void vc_deallocate(unsigned int currcons) 1002{ 1003 WARN_CONSOLE_UNLOCKED(); 1004 1005 if (vc_cons_allocated(currcons)) { 1006 struct vc_data *vc = vc_cons[currcons].d; 1007 struct vt_notifier_param param = { .vc = vc }; 1008 1009 atomic_notifier_call_chain(&vt_notifier_list, VT_DEALLOCATE, ¶m); 1010 vcs_remove_sysfs(currcons); 1011 vc->vc_sw->con_deinit(vc); 1012 put_pid(vc->vt_pid); 1013 module_put(vc->vc_sw->owner); 1014 kfree(vc->vc_screenbuf); 1015 if (currcons >= MIN_NR_CONSOLES) 1016 kfree(vc); 1017 vc_cons[currcons].d = NULL; 1018 } 1019} 1020 1021/* 1022 * VT102 emulator 1023 */ 1024 1025#define set_kbd(vc, x) set_vc_kbd_mode(kbd_table + (vc)->vc_num, (x)) 1026#define clr_kbd(vc, x) clr_vc_kbd_mode(kbd_table + (vc)->vc_num, (x)) 1027#define is_kbd(vc, x) vc_kbd_mode(kbd_table + (vc)->vc_num, (x)) 1028 1029#define decarm VC_REPEAT 1030#define decckm VC_CKMODE 1031#define kbdapplic VC_APPLIC 1032#define lnm VC_CRLF 1033 1034/* 1035 * this is what the terminal answers to a ESC-Z or csi0c query. 1036 */ 1037#define VT100ID "\033[?1;2c" 1038#define VT102ID "\033[?6c" 1039 1040unsigned char color_table[] = { 0, 4, 2, 6, 1, 5, 3, 7, 1041 8,12,10,14, 9,13,11,15 }; 1042 1043/* the default colour table, for VGA+ colour systems */ 1044int default_red[] = {0x00,0xaa,0x00,0xaa,0x00,0xaa,0x00,0xaa, 1045 0x55,0xff,0x55,0xff,0x55,0xff,0x55,0xff}; 1046int default_grn[] = {0x00,0x00,0xaa,0x55,0x00,0x00,0xaa,0xaa, 1047 0x55,0x55,0xff,0xff,0x55,0x55,0xff,0xff}; 1048int default_blu[] = {0x00,0x00,0x00,0x00,0xaa,0xaa,0xaa,0xaa, 1049 0x55,0x55,0x55,0x55,0xff,0xff,0xff,0xff}; 1050 1051module_param_array(default_red, int, NULL, S_IRUGO | S_IWUSR); 1052module_param_array(default_grn, int, NULL, S_IRUGO | S_IWUSR); 1053module_param_array(default_blu, int, NULL, S_IRUGO | S_IWUSR); 1054 1055/* 1056 * gotoxy() must verify all boundaries, because the arguments 1057 * might also be negative. If the given position is out of 1058 * bounds, the cursor is placed at the nearest margin. 1059 */ 1060static void gotoxy(struct vc_data *vc, int new_x, int new_y) 1061{ 1062 int min_y, max_y; 1063 1064 if (new_x < 0) 1065 vc->vc_x = 0; 1066 else { 1067 if (new_x >= vc->vc_cols) 1068 vc->vc_x = vc->vc_cols - 1; 1069 else 1070 vc->vc_x = new_x; 1071 } 1072 1073 if (vc->vc_decom) { 1074 min_y = vc->vc_top; 1075 max_y = vc->vc_bottom; 1076 } else { 1077 min_y = 0; 1078 max_y = vc->vc_rows; 1079 } 1080 if (new_y < min_y) 1081 vc->vc_y = min_y; 1082 else if (new_y >= max_y) 1083 vc->vc_y = max_y - 1; 1084 else 1085 vc->vc_y = new_y; 1086 vc->vc_pos = vc->vc_origin + vc->vc_y * vc->vc_size_row + (vc->vc_x<<1); 1087 vc->vc_need_wrap = 0; 1088} 1089 1090/* for absolute user moves, when decom is set */ 1091static void gotoxay(struct vc_data *vc, int new_x, int new_y) 1092{ 1093 gotoxy(vc, new_x, vc->vc_decom ? (vc->vc_top + new_y) : new_y); 1094} 1095 1096void scrollback(struct vc_data *vc, int lines) 1097{ 1098 if (!lines) 1099 lines = vc->vc_rows / 2; 1100 scrolldelta(-lines); 1101} 1102 1103void scrollfront(struct vc_data *vc, int lines) 1104{ 1105 if (!lines) 1106 lines = vc->vc_rows / 2; 1107 scrolldelta(lines); 1108} 1109 1110static void lf(struct vc_data *vc) 1111{ 1112 /* don't scroll if above bottom of scrolling region, or 1113 * if below scrolling region 1114 */ 1115 if (vc->vc_y + 1 == vc->vc_bottom) 1116 scrup(vc, vc->vc_top, vc->vc_bottom, 1); 1117 else if (vc->vc_y < vc->vc_rows - 1) { 1118 vc->vc_y++; 1119 vc->vc_pos += vc->vc_size_row; 1120 } 1121 vc->vc_need_wrap = 0; 1122 notify_write(vc, '\n'); 1123} 1124 1125static void ri(struct vc_data *vc) 1126{ 1127 /* don't scroll if below top of scrolling region, or 1128 * if above scrolling region 1129 */ 1130 if (vc->vc_y == vc->vc_top) 1131 scrdown(vc, vc->vc_top, vc->vc_bottom, 1); 1132 else if (vc->vc_y > 0) { 1133 vc->vc_y--; 1134 vc->vc_pos -= vc->vc_size_row; 1135 } 1136 vc->vc_need_wrap = 0; 1137} 1138 1139static inline void cr(struct vc_data *vc) 1140{ 1141 vc->vc_pos -= vc->vc_x << 1; 1142 vc->vc_need_wrap = vc->vc_x = 0; 1143 notify_write(vc, '\r'); 1144} 1145 1146static inline void bs(struct vc_data *vc) 1147{ 1148 if (vc->vc_x) { 1149 vc->vc_pos -= 2; 1150 vc->vc_x--; 1151 vc->vc_need_wrap = 0; 1152 notify_write(vc, '\b'); 1153 } 1154} 1155 1156static inline void del(struct vc_data *vc) 1157{ 1158 /* ignored */ 1159} 1160 1161static void csi_J(struct vc_data *vc, int vpar) 1162{ 1163 unsigned int count; 1164 unsigned short * start; 1165 1166 switch (vpar) { 1167 case 0: /* erase from cursor to end of display */ 1168 count = (vc->vc_scr_end - vc->vc_pos) >> 1; 1169 start = (unsigned short *)vc->vc_pos; 1170 if (DO_UPDATE(vc)) { 1171 /* do in two stages */ 1172 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, 1173 vc->vc_cols - vc->vc_x); 1174 vc->vc_sw->con_clear(vc, vc->vc_y + 1, 0, 1175 vc->vc_rows - vc->vc_y - 1, 1176 vc->vc_cols); 1177 } 1178 break; 1179 case 1: /* erase from start to cursor */ 1180 count = ((vc->vc_pos - vc->vc_origin) >> 1) + 1; 1181 start = (unsigned short *)vc->vc_origin; 1182 if (DO_UPDATE(vc)) { 1183 /* do in two stages */ 1184 vc->vc_sw->con_clear(vc, 0, 0, vc->vc_y, 1185 vc->vc_cols); 1186 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1, 1187 vc->vc_x + 1); 1188 } 1189 break; 1190 case 2: /* erase whole display */ 1191 count = vc->vc_cols * vc->vc_rows; 1192 start = (unsigned short *)vc->vc_origin; 1193 if (DO_UPDATE(vc)) 1194 vc->vc_sw->con_clear(vc, 0, 0, 1195 vc->vc_rows, 1196 vc->vc_cols); 1197 break; 1198 default: 1199 return; 1200 } 1201 scr_memsetw(start, vc->vc_video_erase_char, 2 * count); 1202 vc->vc_need_wrap = 0; 1203} 1204 1205static void csi_K(struct vc_data *vc, int vpar) 1206{ 1207 unsigned int count; 1208 unsigned short * start; 1209 1210 switch (vpar) { 1211 case 0: /* erase from cursor to end of line */ 1212 count = vc->vc_cols - vc->vc_x; 1213 start = (unsigned short *)vc->vc_pos; 1214 if (DO_UPDATE(vc)) 1215 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, 1216 vc->vc_cols - vc->vc_x); 1217 break; 1218 case 1: /* erase from start of line to cursor */ 1219 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1)); 1220 count = vc->vc_x + 1; 1221 if (DO_UPDATE(vc)) 1222 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1, 1223 vc->vc_x + 1); 1224 break; 1225 case 2: /* erase whole line */ 1226 start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1)); 1227 count = vc->vc_cols; 1228 if (DO_UPDATE(vc)) 1229 vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1, 1230 vc->vc_cols); 1231 break; 1232 default: 1233 return; 1234 } 1235 scr_memsetw(start, vc->vc_video_erase_char, 2 * count); 1236 vc->vc_need_wrap = 0; 1237} 1238 1239static void csi_X(struct vc_data *vc, int vpar) /* erase the following vpar positions */ 1240{ /* not vt100? */ 1241 int count; 1242 1243 if (!vpar) 1244 vpar++; 1245 count = (vpar > vc->vc_cols - vc->vc_x) ? (vc->vc_cols - vc->vc_x) : vpar; 1246 1247 scr_memsetw((unsigned short *)vc->vc_pos, vc->vc_video_erase_char, 2 * count); 1248 if (DO_UPDATE(vc)) 1249 vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, count); 1250 vc->vc_need_wrap = 0; 1251} 1252 1253static void default_attr(struct vc_data *vc) 1254{ 1255 vc->vc_intensity = 1; 1256 vc->vc_italic = 0; 1257 vc->vc_underline = 0; 1258 vc->vc_reverse = 0; 1259 vc->vc_blink = 0; 1260 vc->vc_color = vc->vc_def_color; 1261} 1262 1263/* console_sem is held */ 1264static void csi_m(struct vc_data *vc) 1265{ 1266 int i; 1267 1268 for (i = 0; i <= vc->vc_npar; i++) 1269 switch (vc->vc_par[i]) { 1270 case 0: /* all attributes off */ 1271 default_attr(vc); 1272 break; 1273 case 1: 1274 vc->vc_intensity = 2; 1275 break; 1276 case 2: 1277 vc->vc_intensity = 0; 1278 break; 1279 case 3: 1280 vc->vc_italic = 1; 1281 break; 1282 case 4: 1283 vc->vc_underline = 1; 1284 break; 1285 case 5: 1286 vc->vc_blink = 1; 1287 break; 1288 case 7: 1289 vc->vc_reverse = 1; 1290 break; 1291 case 10: /* ANSI X3.64-1979 (SCO-ish?) 1292 * Select primary font, don't display 1293 * control chars if defined, don't set 1294 * bit 8 on output. 1295 */ 1296 vc->vc_translate = set_translate(vc->vc_charset == 0 1297 ? vc->vc_G0_charset 1298 : vc->vc_G1_charset, vc); 1299 vc->vc_disp_ctrl = 0; 1300 vc->vc_toggle_meta = 0; 1301 break; 1302 case 11: /* ANSI X3.64-1979 (SCO-ish?) 1303 * Select first alternate font, lets 1304 * chars < 32 be displayed as ROM chars. 1305 */ 1306 vc->vc_translate = set_translate(IBMPC_MAP, vc); 1307 vc->vc_disp_ctrl = 1; 1308 vc->vc_toggle_meta = 0; 1309 break; 1310 case 12: /* ANSI X3.64-1979 (SCO-ish?) 1311 * Select second alternate font, toggle 1312 * high bit before displaying as ROM char. 1313 */ 1314 vc->vc_translate = set_translate(IBMPC_MAP, vc); 1315 vc->vc_disp_ctrl = 1; 1316 vc->vc_toggle_meta = 1; 1317 break; 1318 case 21: 1319 case 22: 1320 vc->vc_intensity = 1; 1321 break; 1322 case 23: 1323 vc->vc_italic = 0; 1324 break; 1325 case 24: 1326 vc->vc_underline = 0; 1327 break; 1328 case 25: 1329 vc->vc_blink = 0; 1330 break; 1331 case 27: 1332 vc->vc_reverse = 0; 1333 break; 1334 case 38: /* ANSI X3.64-1979 (SCO-ish?) 1335 * Enables underscore, white foreground 1336 * with white underscore (Linux - use 1337 * default foreground). 1338 */ 1339 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0); 1340 vc->vc_underline = 1; 1341 break; 1342 case 39: /* ANSI X3.64-1979 (SCO-ish?) 1343 * Disable underline option. 1344 * Reset colour to default? It did this 1345 * before... 1346 */ 1347 vc->vc_color = (vc->vc_def_color & 0x0f) | (vc->vc_color & 0xf0); 1348 vc->vc_underline = 0; 1349 break; 1350 case 49: 1351 vc->vc_color = (vc->vc_def_color & 0xf0) | (vc->vc_color & 0x0f); 1352 break; 1353 default: 1354 if (vc->vc_par[i] >= 30 && vc->vc_par[i] <= 37) 1355 vc->vc_color = color_table[vc->vc_par[i] - 30] 1356 | (vc->vc_color & 0xf0); 1357 else if (vc->vc_par[i] >= 40 && vc->vc_par[i] <= 47) 1358 vc->vc_color = (color_table[vc->vc_par[i] - 40] << 4) 1359 | (vc->vc_color & 0x0f); 1360 break; 1361 } 1362 update_attr(vc); 1363} 1364 1365static void respond_string(const char *p, struct tty_struct *tty) 1366{ 1367 while (*p) { 1368 tty_insert_flip_char(tty, *p, 0); 1369 p++; 1370 } 1371 con_schedule_flip(tty); 1372} 1373 1374static void cursor_report(struct vc_data *vc, struct tty_struct *tty) 1375{ 1376 char buf[40]; 1377 1378 sprintf(buf, "\033[%d;%dR", vc->vc_y + (vc->vc_decom ? vc->vc_top + 1 : 1), vc->vc_x + 1); 1379 respond_string(buf, tty); 1380} 1381 1382static inline void status_report(struct tty_struct *tty) 1383{ 1384 respond_string("\033[0n", tty); /* Terminal ok */ 1385} 1386 1387static inline void respond_ID(struct tty_struct * tty) 1388{ 1389 respond_string(VT102ID, tty); 1390} 1391 1392void mouse_report(struct tty_struct *tty, int butt, int mrx, int mry) 1393{ 1394 char buf[8]; 1395 1396 sprintf(buf, "\033[M%c%c%c", (char)(' ' + butt), (char)('!' + mrx), 1397 (char)('!' + mry)); 1398 respond_string(buf, tty); 1399} 1400 1401/* invoked via ioctl(TIOCLINUX) and through set_selection */ 1402int mouse_reporting(void) 1403{ 1404 return vc_cons[fg_console].d->vc_report_mouse; 1405} 1406 1407/* console_sem is held */ 1408static void set_mode(struct vc_data *vc, int on_off) 1409{ 1410 int i; 1411 1412 for (i = 0; i <= vc->vc_npar; i++) 1413 if (vc->vc_ques) { 1414 switch(vc->vc_par[i]) { /* DEC private modes set/reset */ 1415 case 1: /* Cursor keys send ^[Ox/^[[x */ 1416 if (on_off) 1417 set_kbd(vc, decckm); 1418 else 1419 clr_kbd(vc, decckm); 1420 break; 1421 case 3: /* 80/132 mode switch unimplemented */ 1422 vc->vc_deccolm = on_off; 1423 break; 1424 case 5: /* Inverted screen on/off */ 1425 if (vc->vc_decscnm != on_off) { 1426 vc->vc_decscnm = on_off; 1427 invert_screen(vc, 0, vc->vc_screenbuf_size, 0); 1428 update_attr(vc); 1429 } 1430 break; 1431 case 6: /* Origin relative/absolute */ 1432 vc->vc_decom = on_off; 1433 gotoxay(vc, 0, 0); 1434 break; 1435 case 7: /* Autowrap on/off */ 1436 vc->vc_decawm = on_off; 1437 break; 1438 case 8: /* Autorepeat on/off */ 1439 if (on_off) 1440 set_kbd(vc, decarm); 1441 else 1442 clr_kbd(vc, decarm); 1443 break; 1444 case 9: 1445 vc->vc_report_mouse = on_off ? 1 : 0; 1446 break; 1447 case 25: /* Cursor on/off */ 1448 vc->vc_deccm = on_off; 1449 break; 1450 case 1000: 1451 vc->vc_report_mouse = on_off ? 2 : 0; 1452 break; 1453 } 1454 } else { 1455 switch(vc->vc_par[i]) { /* ANSI modes set/reset */ 1456 case 3: /* Monitor (display ctrls) */ 1457 vc->vc_disp_ctrl = on_off; 1458 break; 1459 case 4: /* Insert Mode on/off */ 1460 vc->vc_decim = on_off; 1461 break; 1462 case 20: /* Lf, Enter == CrLf/Lf */ 1463 if (on_off) 1464 set_kbd(vc, lnm); 1465 else 1466 clr_kbd(vc, lnm); 1467 break; 1468 } 1469 } 1470} 1471 1472/* console_sem is held */ 1473static void setterm_command(struct vc_data *vc) 1474{ 1475 switch(vc->vc_par[0]) { 1476 case 1: /* set color for underline mode */ 1477 if (vc->vc_can_do_color && 1478 vc->vc_par[1] < 16) { 1479 vc->vc_ulcolor = color_table[vc->vc_par[1]]; 1480 if (vc->vc_underline) 1481 update_attr(vc); 1482 } 1483 break; 1484 case 2: /* set color for half intensity mode */ 1485 if (vc->vc_can_do_color && 1486 vc->vc_par[1] < 16) { 1487 vc->vc_halfcolor = color_table[vc->vc_par[1]]; 1488 if (vc->vc_intensity == 0) 1489 update_attr(vc); 1490 } 1491 break; 1492 case 8: /* store colors as defaults */ 1493 vc->vc_def_color = vc->vc_attr; 1494 if (vc->vc_hi_font_mask == 0x100) 1495 vc->vc_def_color >>= 1; 1496 default_attr(vc); 1497 update_attr(vc); 1498 break; 1499 case 9: /* set blanking interval */ 1500 blankinterval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60; 1501 poke_blanked_console(); 1502 break; 1503 case 10: /* set bell frequency in Hz */ 1504 if (vc->vc_npar >= 1) 1505 vc->vc_bell_pitch = vc->vc_par[1]; 1506 else 1507 vc->vc_bell_pitch = DEFAULT_BELL_PITCH; 1508 break; 1509 case 11: /* set bell duration in msec */ 1510 if (vc->vc_npar >= 1) 1511 vc->vc_bell_duration = (vc->vc_par[1] < 2000) ? 1512 vc->vc_par[1] * HZ / 1000 : 0; 1513 else 1514 vc->vc_bell_duration = DEFAULT_BELL_DURATION; 1515 break; 1516 case 12: /* bring specified console to the front */ 1517 if (vc->vc_par[1] >= 1 && vc_cons_allocated(vc->vc_par[1] - 1)) 1518 set_console(vc->vc_par[1] - 1); 1519 break; 1520 case 13: /* unblank the screen */ 1521 poke_blanked_console(); 1522 break; 1523 case 14: /* set vesa powerdown interval */ 1524 vesa_off_interval = ((vc->vc_par[1] < 60) ? vc->vc_par[1] : 60) * 60 * HZ; 1525 break; 1526 case 15: /* activate the previous console */ 1527 set_console(last_console); 1528 break; 1529 } 1530} 1531 1532/* console_sem is held */ 1533static void csi_at(struct vc_data *vc, unsigned int nr) 1534{ 1535 if (nr > vc->vc_cols - vc->vc_x) 1536 nr = vc->vc_cols - vc->vc_x; 1537 else if (!nr) 1538 nr = 1; 1539 insert_char(vc, nr); 1540} 1541 1542/* console_sem is held */ 1543static void csi_L(struct vc_data *vc, unsigned int nr) 1544{ 1545 if (nr > vc->vc_rows - vc->vc_y) 1546 nr = vc->vc_rows - vc->vc_y; 1547 else if (!nr) 1548 nr = 1; 1549 scrdown(vc, vc->vc_y, vc->vc_bottom, nr); 1550 vc->vc_need_wrap = 0; 1551} 1552 1553/* console_sem is held */ 1554static void csi_P(struct vc_data *vc, unsigned int nr) 1555{ 1556 if (nr > vc->vc_cols - vc->vc_x) 1557 nr = vc->vc_cols - vc->vc_x; 1558 else if (!nr) 1559 nr = 1; 1560 delete_char(vc, nr); 1561} 1562 1563/* console_sem is held */ 1564static void csi_M(struct vc_data *vc, unsigned int nr) 1565{ 1566 if (nr > vc->vc_rows - vc->vc_y) 1567 nr = vc->vc_rows - vc->vc_y; 1568 else if (!nr) 1569 nr=1; 1570 scrup(vc, vc->vc_y, vc->vc_bottom, nr); 1571 vc->vc_need_wrap = 0; 1572} 1573 1574/* console_sem is held (except via vc_init->reset_terminal */ 1575static void save_cur(struct vc_data *vc) 1576{ 1577 vc->vc_saved_x = vc->vc_x; 1578 vc->vc_saved_y = vc->vc_y; 1579 vc->vc_s_intensity = vc->vc_intensity; 1580 vc->vc_s_italic = vc->vc_italic; 1581 vc->vc_s_underline = vc->vc_underline; 1582 vc->vc_s_blink = vc->vc_blink; 1583 vc->vc_s_reverse = vc->vc_reverse; 1584 vc->vc_s_charset = vc->vc_charset; 1585 vc->vc_s_color = vc->vc_color; 1586 vc->vc_saved_G0 = vc->vc_G0_charset; 1587 vc->vc_saved_G1 = vc->vc_G1_charset; 1588} 1589 1590/* console_sem is held */ 1591static void restore_cur(struct vc_data *vc) 1592{ 1593 gotoxy(vc, vc->vc_saved_x, vc->vc_saved_y); 1594 vc->vc_intensity = vc->vc_s_intensity; 1595 vc->vc_italic = vc->vc_s_italic; 1596 vc->vc_underline = vc->vc_s_underline; 1597 vc->vc_blink = vc->vc_s_blink; 1598 vc->vc_reverse = vc->vc_s_reverse; 1599 vc->vc_charset = vc->vc_s_charset; 1600 vc->vc_color = vc->vc_s_color; 1601 vc->vc_G0_charset = vc->vc_saved_G0; 1602 vc->vc_G1_charset = vc->vc_saved_G1; 1603 vc->vc_translate = set_translate(vc->vc_charset ? vc->vc_G1_charset : vc->vc_G0_charset, vc); 1604 update_attr(vc); 1605 vc->vc_need_wrap = 0; 1606} 1607 1608enum { ESnormal, ESesc, ESsquare, ESgetpars, ESgotpars, ESfunckey, 1609 EShash, ESsetG0, ESsetG1, ESpercent, ESignore, ESnonstd, 1610 ESpalette }; 1611 1612/* console_sem is held (except via vc_init()) */ 1613static void reset_terminal(struct vc_data *vc, int do_clear) 1614{ 1615 vc->vc_top = 0; 1616 vc->vc_bottom = vc->vc_rows; 1617 vc->vc_state = ESnormal; 1618 vc->vc_ques = 0; 1619 vc->vc_translate = set_translate(LAT1_MAP, vc); 1620 vc->vc_G0_charset = LAT1_MAP; 1621 vc->vc_G1_charset = GRAF_MAP; 1622 vc->vc_charset = 0; 1623 vc->vc_need_wrap = 0; 1624 vc->vc_report_mouse = 0; 1625 vc->vc_utf = default_utf8; 1626 vc->vc_utf_count = 0; 1627 1628 vc->vc_disp_ctrl = 0; 1629 vc->vc_toggle_meta = 0; 1630 1631 vc->vc_decscnm = 0; 1632 vc->vc_decom = 0; 1633 vc->vc_decawm = 1; 1634 vc->vc_deccm = global_cursor_default; 1635 vc->vc_decim = 0; 1636 1637 set_kbd(vc, decarm); 1638 clr_kbd(vc, decckm); 1639 clr_kbd(vc, kbdapplic); 1640 clr_kbd(vc, lnm); 1641 kbd_table[vc->vc_num].lockstate = 0; 1642 kbd_table[vc->vc_num].slockstate = 0; 1643 kbd_table[vc->vc_num].ledmode = LED_SHOW_FLAGS; 1644 kbd_table[vc->vc_num].ledflagstate = kbd_table[vc->vc_num].default_ledflagstate; 1645 /* do not do set_leds here because this causes an endless tasklet loop 1646 when the keyboard hasn't been initialized yet */ 1647 1648 vc->vc_cursor_type = cur_default; 1649 vc->vc_complement_mask = vc->vc_s_complement_mask; 1650 1651 default_attr(vc); 1652 update_attr(vc); 1653 1654 vc->vc_tab_stop[0] = 0x01010100; 1655 vc->vc_tab_stop[1] = 1656 vc->vc_tab_stop[2] = 1657 vc->vc_tab_stop[3] = 1658 vc->vc_tab_stop[4] = 1659 vc->vc_tab_stop[5] = 1660 vc->vc_tab_stop[6] = 1661 vc->vc_tab_stop[7] = 0x01010101; 1662 1663 vc->vc_bell_pitch = DEFAULT_BELL_PITCH; 1664 vc->vc_bell_duration = DEFAULT_BELL_DURATION; 1665 1666 gotoxy(vc, 0, 0); 1667 save_cur(vc); 1668 if (do_clear) 1669 csi_J(vc, 2); 1670} 1671 1672/* console_sem is held */ 1673static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c) 1674{ 1675 /* 1676 * Control characters can be used in the _middle_ 1677 * of an escape sequence. 1678 */ 1679 switch (c) { 1680 case 0: 1681 return; 1682 case 7: 1683 if (vc->vc_bell_duration) 1684 kd_mksound(vc->vc_bell_pitch, vc->vc_bell_duration); 1685 return; 1686 case 8: 1687 bs(vc); 1688 return; 1689 case 9: 1690 vc->vc_pos -= (vc->vc_x << 1); 1691 while (vc->vc_x < vc->vc_cols - 1) { 1692 vc->vc_x++; 1693 if (vc->vc_tab_stop[vc->vc_x >> 5] & (1 << (vc->vc_x & 31))) 1694 break; 1695 } 1696 vc->vc_pos += (vc->vc_x << 1); 1697 notify_write(vc, '\t'); 1698 return; 1699 case 10: case 11: case 12: 1700 lf(vc); 1701 if (!is_kbd(vc, lnm)) 1702 return; 1703 case 13: 1704 cr(vc); 1705 return; 1706 case 14: 1707 vc->vc_charset = 1; 1708 vc->vc_translate = set_translate(vc->vc_G1_charset, vc); 1709 vc->vc_disp_ctrl = 1; 1710 return; 1711 case 15: 1712 vc->vc_charset = 0; 1713 vc->vc_translate = set_translate(vc->vc_G0_charset, vc); 1714 vc->vc_disp_ctrl = 0; 1715 return; 1716 case 24: case 26: 1717 vc->vc_state = ESnormal; 1718 return; 1719 case 27: 1720 vc->vc_state = ESesc; 1721 return; 1722 case 127: 1723 del(vc); 1724 return; 1725 case 128+27: 1726 vc->vc_state = ESsquare; 1727 return; 1728 } 1729 switch(vc->vc_state) { 1730 case ESesc: 1731 vc->vc_state = ESnormal; 1732 switch (c) { 1733 case '[': 1734 vc->vc_state = ESsquare; 1735 return; 1736 case ']': 1737 vc->vc_state = ESnonstd; 1738 return; 1739 case '%': 1740 vc->vc_state = ESpercent; 1741 return; 1742 case 'E': 1743 cr(vc); 1744 lf(vc); 1745 return; 1746 case 'M': 1747 ri(vc); 1748 return; 1749 case 'D': 1750 lf(vc); 1751 return; 1752 case 'H': 1753 vc->vc_tab_stop[vc->vc_x >> 5] |= (1 << (vc->vc_x & 31)); 1754 return; 1755 case 'Z': 1756 respond_ID(tty); 1757 return; 1758 case '7': 1759 save_cur(vc); 1760 return; 1761 case '8': 1762 restore_cur(vc); 1763 return; 1764 case '(': 1765 vc->vc_state = ESsetG0; 1766 return; 1767 case ')': 1768 vc->vc_state = ESsetG1; 1769 return; 1770 case '#': 1771 vc->vc_state = EShash; 1772 return; 1773 case 'c': 1774 reset_terminal(vc, 1); 1775 return; 1776 case '>': /* Numeric keypad */ 1777 clr_kbd(vc, kbdapplic); 1778 return; 1779 case '=': /* Appl. keypad */ 1780 set_kbd(vc, kbdapplic); 1781 return; 1782 } 1783 return; 1784 case ESnonstd: 1785 if (c=='P') { /* palette escape sequence */ 1786 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++) 1787 vc->vc_par[vc->vc_npar] = 0; 1788 vc->vc_npar = 0; 1789 vc->vc_state = ESpalette; 1790 return; 1791 } else if (c=='R') { /* reset palette */ 1792 reset_palette(vc); 1793 vc->vc_state = ESnormal; 1794 } else 1795 vc->vc_state = ESnormal; 1796 return; 1797 case ESpalette: 1798 if (isxdigit(c)) { 1799 vc->vc_par[vc->vc_npar++] = hex_to_bin(c); 1800 if (vc->vc_npar == 7) { 1801 int i = vc->vc_par[0] * 3, j = 1; 1802 vc->vc_palette[i] = 16 * vc->vc_par[j++]; 1803 vc->vc_palette[i++] += vc->vc_par[j++]; 1804 vc->vc_palette[i] = 16 * vc->vc_par[j++]; 1805 vc->vc_palette[i++] += vc->vc_par[j++]; 1806 vc->vc_palette[i] = 16 * vc->vc_par[j++]; 1807 vc->vc_palette[i] += vc->vc_par[j]; 1808 set_palette(vc); 1809 vc->vc_state = ESnormal; 1810 } 1811 } else 1812 vc->vc_state = ESnormal; 1813 return; 1814 case ESsquare: 1815 for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++) 1816 vc->vc_par[vc->vc_npar] = 0; 1817 vc->vc_npar = 0; 1818 vc->vc_state = ESgetpars; 1819 if (c == '[') { /* Function key */ 1820 vc->vc_state=ESfunckey; 1821 return; 1822 } 1823 vc->vc_ques = (c == '?'); 1824 if (vc->vc_ques) 1825 return; 1826 case ESgetpars: 1827 if (c == ';' && vc->vc_npar < NPAR - 1) { 1828 vc->vc_npar++; 1829 return; 1830 } else if (c>='0' && c<='9') { 1831 vc->vc_par[vc->vc_npar] *= 10; 1832 vc->vc_par[vc->vc_npar] += c - '0'; 1833 return; 1834 } else 1835 vc->vc_state = ESgotpars; 1836 case ESgotpars: 1837 vc->vc_state = ESnormal; 1838 switch(c) { 1839 case 'h': 1840 set_mode(vc, 1); 1841 return; 1842 case 'l': 1843 set_mode(vc, 0); 1844 return; 1845 case 'c': 1846 if (vc->vc_ques) { 1847 if (vc->vc_par[0]) 1848 vc->vc_cursor_type = vc->vc_par[0] | (vc->vc_par[1] << 8) | (vc->vc_par[2] << 16); 1849 else 1850 vc->vc_cursor_type = cur_default; 1851 return; 1852 } 1853 break; 1854 case 'm': 1855 if (vc->vc_ques) { 1856 clear_selection(); 1857 if (vc->vc_par[0]) 1858 vc->vc_complement_mask = vc->vc_par[0] << 8 | vc->vc_par[1]; 1859 else 1860 vc->vc_complement_mask = vc->vc_s_complement_mask; 1861 return; 1862 } 1863 break; 1864 case 'n': 1865 if (!vc->vc_ques) { 1866 if (vc->vc_par[0] == 5) 1867 status_report(tty); 1868 else if (vc->vc_par[0] == 6) 1869 cursor_report(vc, tty); 1870 } 1871 return; 1872 } 1873 if (vc->vc_ques) { 1874 vc->vc_ques = 0; 1875 return; 1876 } 1877 switch(c) { 1878 case 'G': case '`': 1879 if (vc->vc_par[0]) 1880 vc->vc_par[0]--; 1881 gotoxy(vc, vc->vc_par[0], vc->vc_y); 1882 return; 1883 case 'A': 1884 if (!vc->vc_par[0]) 1885 vc->vc_par[0]++; 1886 gotoxy(vc, vc->vc_x, vc->vc_y - vc->vc_par[0]); 1887 return; 1888 case 'B': case 'e': 1889 if (!vc->vc_par[0]) 1890 vc->vc_par[0]++; 1891 gotoxy(vc, vc->vc_x, vc->vc_y + vc->vc_par[0]); 1892 return; 1893 case 'C': case 'a': 1894 if (!vc->vc_par[0]) 1895 vc->vc_par[0]++; 1896 gotoxy(vc, vc->vc_x + vc->vc_par[0], vc->vc_y); 1897 return; 1898 case 'D': 1899 if (!vc->vc_par[0]) 1900 vc->vc_par[0]++; 1901 gotoxy(vc, vc->vc_x - vc->vc_par[0], vc->vc_y); 1902 return; 1903 case 'E': 1904 if (!vc->vc_par[0]) 1905 vc->vc_par[0]++; 1906 gotoxy(vc, 0, vc->vc_y + vc->vc_par[0]); 1907 return; 1908 case 'F': 1909 if (!vc->vc_par[0]) 1910 vc->vc_par[0]++; 1911 gotoxy(vc, 0, vc->vc_y - vc->vc_par[0]); 1912 return; 1913 case 'd': 1914 if (vc->vc_par[0]) 1915 vc->vc_par[0]--; 1916 gotoxay(vc, vc->vc_x ,vc->vc_par[0]); 1917 return; 1918 case 'H': case 'f': 1919 if (vc->vc_par[0]) 1920 vc->vc_par[0]--; 1921 if (vc->vc_par[1]) 1922 vc->vc_par[1]--; 1923 gotoxay(vc, vc->vc_par[1], vc->vc_par[0]); 1924 return; 1925 case 'J': 1926 csi_J(vc, vc->vc_par[0]); 1927 return; 1928 case 'K': 1929 csi_K(vc, vc->vc_par[0]); 1930 return; 1931 case 'L': 1932 csi_L(vc, vc->vc_par[0]); 1933 return; 1934 case 'M': 1935 csi_M(vc, vc->vc_par[0]); 1936 return; 1937 case 'P': 1938 csi_P(vc, vc->vc_par[0]); 1939 return; 1940 case 'c': 1941 if (!vc->vc_par[0]) 1942 respond_ID(tty); 1943 return; 1944 case 'g': 1945 if (!vc->vc_par[0]) 1946 vc->vc_tab_stop[vc->vc_x >> 5] &= ~(1 << (vc->vc_x & 31)); 1947 else if (vc->vc_par[0] == 3) { 1948 vc->vc_tab_stop[0] = 1949 vc->vc_tab_stop[1] = 1950 vc->vc_tab_stop[2] = 1951 vc->vc_tab_stop[3] = 1952 vc->vc_tab_stop[4] = 1953 vc->vc_tab_stop[5] = 1954 vc->vc_tab_stop[6] = 1955 vc->vc_tab_stop[7] = 0; 1956 } 1957 return; 1958 case 'm': 1959 csi_m(vc); 1960 return; 1961 case 'q': /* DECLL - but only 3 leds */ 1962 /* map 0,1,2,3 to 0,1,2,4 */ 1963 if (vc->vc_par[0] < 4) 1964 setledstate(kbd_table + vc->vc_num, 1965 (vc->vc_par[0] < 3) ? vc->vc_par[0] : 4); 1966 return; 1967 case 'r': 1968 if (!vc->vc_par[0]) 1969 vc->vc_par[0]++; 1970 if (!vc->vc_par[1]) 1971 vc->vc_par[1] = vc->vc_rows; 1972 /* Minimum allowed region is 2 lines */ 1973 if (vc->vc_par[0] < vc->vc_par[1] && 1974 vc->vc_par[1] <= vc->vc_rows) { 1975 vc->vc_top = vc->vc_par[0] - 1; 1976 vc->vc_bottom = vc->vc_par[1]; 1977 gotoxay(vc, 0, 0); 1978 } 1979 return; 1980 case 's': 1981 save_cur(vc); 1982 return; 1983 case 'u': 1984 restore_cur(vc); 1985 return; 1986 case 'X': 1987 csi_X(vc, vc->vc_par[0]); 1988 return; 1989 case '@': 1990 csi_at(vc, vc->vc_par[0]); 1991 return; 1992 case ']': /* setterm functions */ 1993 setterm_command(vc); 1994 return; 1995 } 1996 return; 1997 case ESpercent: 1998 vc->vc_state = ESnormal; 1999 switch (c) { 2000 case '@': /* defined in ISO 2022 */ 2001 vc->vc_utf = 0; 2002 return; 2003 case 'G': /* prelim official escape code */ 2004 case '8': /* retained for compatibility */ 2005 vc->vc_utf = 1; 2006 return; 2007 } 2008 return; 2009 case ESfunckey: 2010 vc->vc_state = ESnormal; 2011 return; 2012 case EShash: 2013 vc->vc_state = ESnormal; 2014 if (c == '8') { 2015 /* DEC screen alignment test. kludge :-) */ 2016 vc->vc_video_erase_char = 2017 (vc->vc_video_erase_char & 0xff00) | 'E'; 2018 csi_J(vc, 2); 2019 vc->vc_video_erase_char = 2020 (vc->vc_video_erase_char & 0xff00) | ' '; 2021 do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2); 2022 } 2023 return; 2024 case ESsetG0: 2025 if (c == '0') 2026 vc->vc_G0_charset = GRAF_MAP; 2027 else if (c == 'B') 2028 vc->vc_G0_charset = LAT1_MAP; 2029 else if (c == 'U') 2030 vc->vc_G0_charset = IBMPC_MAP; 2031 else if (c == 'K') 2032 vc->vc_G0_charset = USER_MAP; 2033 if (vc->vc_charset == 0) 2034 vc->vc_translate = set_translate(vc->vc_G0_charset, vc); 2035 vc->vc_state = ESnormal; 2036 return; 2037 case ESsetG1: 2038 if (c == '0') 2039 vc->vc_G1_charset = GRAF_MAP; 2040 else if (c == 'B') 2041 vc->vc_G1_charset = LAT1_MAP; 2042 else if (c == 'U') 2043 vc->vc_G1_charset = IBMPC_MAP; 2044 else if (c == 'K') 2045 vc->vc_G1_charset = USER_MAP; 2046 if (vc->vc_charset == 1) 2047 vc->vc_translate = set_translate(vc->vc_G1_charset, vc); 2048 vc->vc_state = ESnormal; 2049 return; 2050 default: 2051 vc->vc_state = ESnormal; 2052 } 2053} 2054 2055/* This is a temporary buffer used to prepare a tty console write 2056 * so that we can easily avoid touching user space while holding the 2057 * console spinlock. It is allocated in con_init and is shared by 2058 * this code and the vc_screen read/write tty calls. 2059 * 2060 * We have to allocate this statically in the kernel data section 2061 * since console_init (and thus con_init) are called before any 2062 * kernel memory allocation is available. 2063 */ 2064char con_buf[CON_BUF_SIZE]; 2065DEFINE_MUTEX(con_buf_mtx); 2066 2067/* is_double_width() is based on the wcwidth() implementation by 2068 * Markus Kuhn -- 2007-05-26 (Unicode 5.0) 2069 * Latest version: http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c 2070 */ 2071struct interval { 2072 uint32_t first; 2073 uint32_t last; 2074}; 2075 2076static int bisearch(uint32_t ucs, const struct interval *table, int max) 2077{ 2078 int min = 0; 2079 int mid; 2080 2081 if (ucs < table[0].first || ucs > table[max].last) 2082 return 0; 2083 while (max >= min) { 2084 mid = (min + max) / 2; 2085 if (ucs > table[mid].last) 2086 min = mid + 1; 2087 else if (ucs < table[mid].first) 2088 max = mid - 1; 2089 else 2090 return 1; 2091 } 2092 return 0; 2093} 2094 2095static int is_double_width(uint32_t ucs) 2096{ 2097 static const struct interval double_width[] = { 2098 { 0x1100, 0x115F }, { 0x2329, 0x232A }, { 0x2E80, 0x303E }, 2099 { 0x3040, 0xA4CF }, { 0xAC00, 0xD7A3 }, { 0xF900, 0xFAFF }, 2100 { 0xFE10, 0xFE19 }, { 0xFE30, 0xFE6F }, { 0xFF00, 0xFF60 }, 2101 { 0xFFE0, 0xFFE6 }, { 0x20000, 0x2FFFD }, { 0x30000, 0x3FFFD } 2102 }; 2103 return bisearch(ucs, double_width, ARRAY_SIZE(double_width) - 1); 2104} 2105 2106/* acquires console_sem */ 2107static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int count) 2108{ 2109#ifdef VT_BUF_VRAM_ONLY 2110#define FLUSH do { } while(0); 2111#else 2112#define FLUSH if (draw_x >= 0) { \ 2113 vc->vc_sw->con_putcs(vc, (u16 *)draw_from, (u16 *)draw_to - (u16 *)draw_from, vc->vc_y, draw_x); \ 2114 draw_x = -1; \ 2115 } 2116#endif 2117 2118 int c, tc, ok, n = 0, draw_x = -1; 2119 unsigned int currcons; 2120 unsigned long draw_from = 0, draw_to = 0; 2121 struct vc_data *vc; 2122 unsigned char vc_attr; 2123 struct vt_notifier_param param; 2124 uint8_t rescan; 2125 uint8_t inverse; 2126 uint8_t width; 2127 u16 himask, charmask; 2128 2129 if (in_interrupt()) 2130 return count; 2131 2132 might_sleep(); 2133 2134 acquire_console_sem(); 2135 vc = tty->driver_data; 2136 if (vc == NULL) { 2137 printk(KERN_ERR "vt: argh, driver_data is NULL !\n"); 2138 release_console_sem(); 2139 return 0; 2140 } 2141 2142 currcons = vc->vc_num; 2143 if (!vc_cons_allocated(currcons)) { 2144 /* could this happen? */ 2145 printk_once("con_write: tty %d not allocated\n", currcons+1); 2146 release_console_sem(); 2147 return 0; 2148 } 2149 2150 himask = vc->vc_hi_font_mask; 2151 charmask = himask ? 0x1ff : 0xff; 2152 2153 /* undraw cursor first */ 2154 if (IS_FG(vc)) 2155 hide_cursor(vc); 2156 2157 param.vc = vc; 2158 2159 while (!tty->stopped && count) { 2160 int orig = *buf; 2161 c = orig; 2162 buf++; 2163 n++; 2164 count--; 2165 rescan = 0; 2166 inverse = 0; 2167 width = 1; 2168 2169 /* Do no translation at all in control states */ 2170 if (vc->vc_state != ESnormal) { 2171 tc = c; 2172 } else if (vc->vc_utf && !vc->vc_disp_ctrl) { 2173 /* Combine UTF-8 into Unicode in vc_utf_char. 2174 * vc_utf_count is the number of continuation bytes still 2175 * expected to arrive. 2176 * vc_npar is the number of continuation bytes arrived so 2177 * far 2178 */ 2179rescan_last_byte: 2180 if ((c & 0xc0) == 0x80) { 2181 /* Continuation byte received */ 2182 static const uint32_t utf8_length_changes[] = { 0x0000007f, 0x000007ff, 0x0000ffff, 0x001fffff, 0x03ffffff, 0x7fffffff }; 2183 if (vc->vc_utf_count) { 2184 vc->vc_utf_char = (vc->vc_utf_char << 6) | (c & 0x3f); 2185 vc->vc_npar++; 2186 if (--vc->vc_utf_count) { 2187 /* Still need some bytes */ 2188 continue; 2189 } 2190 /* Got a whole character */ 2191 c = vc->vc_utf_char; 2192 /* Reject overlong sequences */ 2193 if (c <= utf8_length_changes[vc->vc_npar - 1] || 2194 c > utf8_length_changes[vc->vc_npar]) 2195 c = 0xfffd; 2196 } else { 2197 /* Unexpected continuation byte */ 2198 vc->vc_utf_count = 0; 2199 c = 0xfffd; 2200 } 2201 } else { 2202 /* Single ASCII byte or first byte of a sequence received */ 2203 if (vc->vc_utf_count) { 2204 /* Continuation byte expected */ 2205 rescan = 1; 2206 vc->vc_utf_count = 0; 2207 c = 0xfffd; 2208 } else if (c > 0x7f) { 2209 /* First byte of a multibyte sequence received */ 2210 vc->vc_npar = 0; 2211 if ((c & 0xe0) == 0xc0) { 2212 vc->vc_utf_count = 1; 2213 vc->vc_utf_char = (c & 0x1f); 2214 } else if ((c & 0xf0) == 0xe0) { 2215 vc->vc_utf_count = 2; 2216 vc->vc_utf_char = (c & 0x0f); 2217 } else if ((c & 0xf8) == 0xf0) { 2218 vc->vc_utf_count = 3; 2219 vc->vc_utf_char = (c & 0x07); 2220 } else if ((c & 0xfc) == 0xf8) { 2221 vc->vc_utf_count = 4; 2222 vc->vc_utf_char = (c & 0x03); 2223 } else if ((c & 0xfe) == 0xfc) { 2224 vc->vc_utf_count = 5; 2225 vc->vc_utf_char = (c & 0x01); 2226 } else { 2227 /* 254 and 255 are invalid */ 2228 c = 0xfffd; 2229 } 2230 if (vc->vc_utf_count) { 2231 /* Still need some bytes */ 2232 continue; 2233 } 2234 } 2235 /* Nothing to do if an ASCII byte was received */ 2236 } 2237 /* End of UTF-8 decoding. */ 2238 /* c is the received character, or U+FFFD for invalid sequences. */ 2239 /* Replace invalid Unicode code points with U+FFFD too */ 2240 if ((c >= 0xd800 && c <= 0xdfff) || c == 0xfffe || c == 0xffff) 2241 c = 0xfffd; 2242 tc = c; 2243 } else { /* no utf or alternate charset mode */ 2244 tc = vc_translate(vc, c); 2245 } 2246 2247 param.c = tc; 2248 if (atomic_notifier_call_chain(&vt_notifier_list, VT_PREWRITE, 2249 ¶m) == NOTIFY_STOP) 2250 continue; 2251 2252 /* If the original code was a control character we 2253 * only allow a glyph to be displayed if the code is 2254 * not normally used (such as for cursor movement) or 2255 * if the disp_ctrl mode has been explicitly enabled. 2256 * Certain characters (as given by the CTRL_ALWAYS 2257 * bitmap) are always displayed as control characters, 2258 * as the console would be pretty useless without 2259 * them; to display an arbitrary font position use the 2260 * direct-to-font zone in UTF-8 mode. 2261 */ 2262 ok = tc && (c >= 32 || 2263 !(vc->vc_disp_ctrl ? (CTRL_ALWAYS >> c) & 1 : 2264 vc->vc_utf || ((CTRL_ACTION >> c) & 1))) 2265 && (c != 127 || vc->vc_disp_ctrl) 2266 && (c != 128+27); 2267 2268 if (vc->vc_state == ESnormal && ok) { 2269 if (vc->vc_utf && !vc->vc_disp_ctrl) { 2270 if (is_double_width(c)) 2271 width = 2; 2272 } 2273 /* Now try to find out how to display it */ 2274 tc = conv_uni_to_pc(vc, tc); 2275 if (tc & ~charmask) { 2276 if (tc == -1 || tc == -2) { 2277 continue; /* nothing to display */ 2278 } 2279 /* Glyph not found */ 2280 if ((!(vc->vc_utf && !vc->vc_disp_ctrl) || c < 128) && !(c & ~charmask)) { 2281 /* In legacy mode use the glyph we get by a 1:1 mapping. 2282 This would make absolutely no sense with Unicode in mind, 2283 but do this for ASCII characters since a font may lack 2284 Unicode mapping info and we don't want to end up with 2285 having question marks only. */ 2286 tc = c; 2287 } else { 2288 /* Display U+FFFD. If it's not found, display an inverse question mark. */ 2289 tc = conv_uni_to_pc(vc, 0xfffd); 2290 if (tc < 0) { 2291 inverse = 1; 2292 tc = conv_uni_to_pc(vc, '?'); 2293 if (tc < 0) tc = '?'; 2294 } 2295 } 2296 } 2297 2298 if (!inverse) { 2299 vc_attr = vc->vc_attr; 2300 } else { 2301 /* invert vc_attr */ 2302 if (!vc->vc_can_do_color) { 2303 vc_attr = (vc->vc_attr) ^ 0x08; 2304 } else if (vc->vc_hi_font_mask == 0x100) { 2305 vc_attr = ((vc->vc_attr) & 0x11) | (((vc->vc_attr) & 0xe0) >> 4) | (((vc->vc_attr) & 0x0e) << 4); 2306 } else { 2307 vc_attr = ((vc->vc_attr) & 0x88) | (((vc->vc_attr) & 0x70) >> 4) | (((vc->vc_attr) & 0x07) << 4); 2308 } 2309 FLUSH 2310 } 2311 2312 while (1) { 2313 if (vc->vc_need_wrap || vc->vc_decim) 2314 FLUSH 2315 if (vc->vc_need_wrap) { 2316 cr(vc); 2317 lf(vc); 2318 } 2319 if (vc->vc_decim) 2320 insert_char(vc, 1); 2321 scr_writew(himask ? 2322 ((vc_attr << 8) & ~himask) + ((tc & 0x100) ? himask : 0) + (tc & 0xff) : 2323 (vc_attr << 8) + tc, 2324 (u16 *) vc->vc_pos); 2325 if (DO_UPDATE(vc) && draw_x < 0) { 2326 draw_x = vc->vc_x; 2327 draw_from = vc->vc_pos; 2328 } 2329 if (vc->vc_x == vc->vc_cols - 1) { 2330 vc->vc_need_wrap = vc->vc_decawm; 2331 draw_to = vc->vc_pos + 2; 2332 } else { 2333 vc->vc_x++; 2334 draw_to = (vc->vc_pos += 2); 2335 } 2336 2337 if (!--width) break; 2338 2339 tc = conv_uni_to_pc(vc, ' '); /* A space is printed in the second column */ 2340 if (tc < 0) tc = ' '; 2341 } 2342 notify_write(vc, c); 2343 2344 if (inverse) { 2345 FLUSH 2346 } 2347 2348 if (rescan) { 2349 rescan = 0; 2350 inverse = 0; 2351 width = 1; 2352 c = orig; 2353 goto rescan_last_byte; 2354 } 2355 continue; 2356 } 2357 FLUSH 2358 do_con_trol(tty, vc, orig); 2359 } 2360 FLUSH 2361 console_conditional_schedule(); 2362 release_console_sem(); 2363 notify_update(vc); 2364 return n; 2365#undef FLUSH 2366} 2367 2368/* 2369 * This is the console switching callback. 2370 * 2371 * Doing console switching in a process context allows 2372 * us to do the switches asynchronously (needed when we want 2373 * to switch due to a keyboard interrupt). Synchronization 2374 * with other console code and prevention of re-entrancy is 2375 * ensured with console_sem. 2376 */ 2377static void console_callback(struct work_struct *ignored) 2378{ 2379 acquire_console_sem(); 2380 2381 if (want_console >= 0) { 2382 if (want_console != fg_console && 2383 vc_cons_allocated(want_console)) { 2384 hide_cursor(vc_cons[fg_console].d); 2385 change_console(vc_cons[want_console].d); 2386 /* we only changed when the console had already 2387 been allocated - a new console is not created 2388 in an interrupt routine */ 2389 } 2390 want_console = -1; 2391 } 2392 if (do_poke_blanked_console) { /* do not unblank for a LED change */ 2393 do_poke_blanked_console = 0; 2394 poke_blanked_console(); 2395 } 2396 if (scrollback_delta) { 2397 struct vc_data *vc = vc_cons[fg_console].d; 2398 clear_selection(); 2399 if (vc->vc_mode == KD_TEXT) 2400 vc->vc_sw->con_scrolldelta(vc, scrollback_delta); 2401 scrollback_delta = 0; 2402 } 2403 if (blank_timer_expired) { 2404 do_blank_screen(0); 2405 blank_timer_expired = 0; 2406 } 2407 notify_update(vc_cons[fg_console].d); 2408 2409 release_console_sem(); 2410} 2411 2412int set_console(int nr) 2413{ 2414 struct vc_data *vc = vc_cons[fg_console].d; 2415 2416 if (!vc_cons_allocated(nr) || vt_dont_switch || 2417 (vc->vt_mode.mode == VT_AUTO && vc->vc_mode == KD_GRAPHICS)) { 2418 2419 /* 2420 * Console switch will fail in console_callback() or 2421 * change_console() so there is no point scheduling 2422 * the callback 2423 * 2424 * Existing set_console() users don't check the return 2425 * value so this shouldn't break anything 2426 */ 2427 return -EINVAL; 2428 } 2429 2430 want_console = nr; 2431 schedule_console_callback(); 2432 2433 return 0; 2434} 2435 2436struct tty_driver *console_driver; 2437 2438#ifdef CONFIG_VT_CONSOLE 2439 2440/** 2441 * vt_kmsg_redirect() - Sets/gets the kernel message console 2442 * @new: The new virtual terminal number or -1 if the console should stay 2443 * unchanged 2444 * 2445 * By default, the kernel messages are always printed on the current virtual 2446 * console. However, the user may modify that default with the 2447 * TIOCL_SETKMSGREDIRECT ioctl call. 2448 * 2449 * This function sets the kernel message console to be @new. It returns the old 2450 * virtual console number. The virtual terminal number 0 (both as parameter and 2451 * return value) means no redirection (i.e. always printed on the currently 2452 * active console). 2453 * 2454 * The parameter -1 means that only the current console is returned, but the 2455 * value is not modified. You may use the macro vt_get_kmsg_redirect() in that 2456 * case to make the code more understandable. 2457 * 2458 * When the kernel is compiled without CONFIG_VT_CONSOLE, this function ignores 2459 * the parameter and always returns 0. 2460 */ 2461int vt_kmsg_redirect(int new) 2462{ 2463 static int kmsg_con; 2464 2465 if (new != -1) 2466 return xchg(&kmsg_con, new); 2467 else 2468 return kmsg_con; 2469} 2470 2471/* 2472 * Console on virtual terminal 2473 * 2474 * The console must be locked when we get here. 2475 */ 2476 2477static void vt_console_print(struct console *co, const char *b, unsigned count) 2478{ 2479 struct vc_data *vc = vc_cons[fg_console].d; 2480 unsigned char c; 2481 static DEFINE_SPINLOCK(printing_lock); 2482 const ushort *start; 2483 ushort cnt = 0; 2484 ushort myx; 2485 int kmsg_console; 2486 2487 /* console busy or not yet initialized */ 2488 if (!printable) 2489 return; 2490 if (!spin_trylock(&printing_lock)) 2491 return; 2492 2493 kmsg_console = vt_get_kmsg_redirect(); 2494 if (kmsg_console && vc_cons_allocated(kmsg_console - 1)) 2495 vc = vc_cons[kmsg_console - 1].d; 2496 2497 /* read `x' only after setting currcons properly (otherwise 2498 the `x' macro will read the x of the foreground console). */ 2499 myx = vc->vc_x; 2500 2501 if (!vc_cons_allocated(fg_console)) { 2502 /* impossible */ 2503 /* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */ 2504 goto quit; 2505 } 2506 2507 if (vc->vc_mode != KD_TEXT && !vt_force_oops_output(vc)) 2508 goto quit; 2509 2510 /* undraw cursor first */ 2511 if (IS_FG(vc)) 2512 hide_cursor(vc); 2513 2514 start = (ushort *)vc->vc_pos; 2515 2516 /* Contrived structure to try to emulate original need_wrap behaviour 2517 * Problems caused when we have need_wrap set on '\n' character */ 2518 while (count--) { 2519 c = *b++; 2520 if (c == 10 || c == 13 || c == 8 || vc->vc_need_wrap) { 2521 if (cnt > 0) { 2522 if (CON_IS_VISIBLE(vc)) 2523 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x); 2524 vc->vc_x += cnt; 2525 if (vc->vc_need_wrap) 2526 vc->vc_x--; 2527 cnt = 0; 2528 } 2529 if (c == 8) { /* backspace */ 2530 bs(vc); 2531 start = (ushort *)vc->vc_pos; 2532 myx = vc->vc_x; 2533 continue; 2534 } 2535 if (c != 13) 2536 lf(vc); 2537 cr(vc); 2538 start = (ushort *)vc->vc_pos; 2539 myx = vc->vc_x; 2540 if (c == 10 || c == 13) 2541 continue; 2542 } 2543 scr_writew((vc->vc_attr << 8) + c, (unsigned short *)vc->vc_pos); 2544 notify_write(vc, c); 2545 cnt++; 2546 if (myx == vc->vc_cols - 1) { 2547 vc->vc_need_wrap = 1; 2548 continue; 2549 } 2550 vc->vc_pos += 2; 2551 myx++; 2552 } 2553 if (cnt > 0) { 2554 if (CON_IS_VISIBLE(vc)) 2555 vc->vc_sw->con_putcs(vc, start, cnt, vc->vc_y, vc->vc_x); 2556 vc->vc_x += cnt; 2557 if (vc->vc_x == vc->vc_cols) { 2558 vc->vc_x--; 2559 vc->vc_need_wrap = 1; 2560 } 2561 } 2562 set_cursor(vc); 2563 notify_update(vc); 2564 2565quit: 2566 spin_unlock(&printing_lock); 2567} 2568 2569static struct tty_driver *vt_console_device(struct console *c, int *index) 2570{ 2571 *index = c->index ? c->index-1 : fg_console; 2572 return console_driver; 2573} 2574 2575static struct console vt_console_driver = { 2576 .name = "tty", 2577 .write = vt_console_print, 2578 .device = vt_console_device, 2579 .unblank = unblank_screen, 2580 .flags = CON_PRINTBUFFER, 2581 .index = -1, 2582}; 2583#endif 2584 2585/* 2586 * Handling of Linux-specific VC ioctls 2587 */ 2588 2589/* 2590 * Generally a bit racy with respect to console_sem(). 2591 * 2592 * There are some functions which don't need it. 2593 * 2594 * There are some functions which can sleep for arbitrary periods 2595 * (paste_selection) but we don't need the lock there anyway. 2596 * 2597 * set_selection has locking, and definitely needs it 2598 */ 2599 2600int tioclinux(struct tty_struct *tty, unsigned long arg) 2601{ 2602 char type, data; 2603 char __user *p = (char __user *)arg; 2604 int lines; 2605 int ret; 2606 2607 if (current->signal->tty != tty && !capable(CAP_SYS_ADMIN)) 2608 return -EPERM; 2609 if (get_user(type, p)) 2610 return -EFAULT; 2611 ret = 0; 2612 2613 switch (type) 2614 { 2615 case TIOCL_SETSEL: 2616 acquire_console_sem(); 2617 ret = set_selection((struct tiocl_selection __user *)(p+1), tty); 2618 release_console_sem(); 2619 break; 2620 case TIOCL_PASTESEL: 2621 ret = paste_selection(tty); 2622 break; 2623 case TIOCL_UNBLANKSCREEN: 2624 acquire_console_sem(); 2625 unblank_screen(); 2626 release_console_sem(); 2627 break; 2628 case TIOCL_SELLOADLUT: 2629 ret = sel_loadlut(p); 2630 break; 2631 case TIOCL_GETSHIFTSTATE: 2632 2633 /* 2634 * Make it possible to react to Shift+Mousebutton. 2635 * Note that 'shift_state' is an undocumented 2636 * kernel-internal variable; programs not closely 2637 * related to the kernel should not use this. 2638 */ 2639 data = shift_state; 2640 ret = __put_user(data, p); 2641 break; 2642 case TIOCL_GETMOUSEREPORTING: 2643 data = mouse_reporting(); 2644 ret = __put_user(data, p); 2645 break; 2646 case TIOCL_SETVESABLANK: 2647 ret = set_vesa_blanking(p); 2648 break; 2649 case TIOCL_GETKMSGREDIRECT: 2650 data = vt_get_kmsg_redirect(); 2651 ret = __put_user(data, p); 2652 break; 2653 case TIOCL_SETKMSGREDIRECT: 2654 if (!capable(CAP_SYS_ADMIN)) { 2655 ret = -EPERM; 2656 } else { 2657 if (get_user(data, p+1)) 2658 ret = -EFAULT; 2659 else 2660 vt_kmsg_redirect(data); 2661 } 2662 break; 2663 case TIOCL_GETFGCONSOLE: 2664 ret = fg_console; 2665 break; 2666 case TIOCL_SCROLLCONSOLE: 2667 if (get_user(lines, (s32 __user *)(p+4))) { 2668 ret = -EFAULT; 2669 } else { 2670 scrollfront(vc_cons[fg_console].d, lines); 2671 ret = 0; 2672 } 2673 break; 2674 case TIOCL_BLANKSCREEN: /* until explicitly unblanked, not only poked */ 2675 acquire_console_sem(); 2676 ignore_poke = 1; 2677 do_blank_screen(0); 2678 release_console_sem(); 2679 break; 2680 case TIOCL_BLANKEDSCREEN: 2681 ret = console_blanked; 2682 break; 2683 default: 2684 ret = -EINVAL; 2685 break; 2686 } 2687 return ret; 2688} 2689 2690/* 2691 * /dev/ttyN handling 2692 */ 2693 2694static int con_write(struct tty_struct *tty, const unsigned char *buf, int count) 2695{ 2696 int retval; 2697 2698 retval = do_con_write(tty, buf, count); 2699 con_flush_chars(tty); 2700 2701 return retval; 2702} 2703 2704static int con_put_char(struct tty_struct *tty, unsigned char ch) 2705{ 2706 if (in_interrupt()) 2707 return 0; /* n_r3964 calls put_char() from interrupt context */ 2708 return do_con_write(tty, &ch, 1); 2709} 2710 2711static int con_write_room(struct tty_struct *tty) 2712{ 2713 if (tty->stopped) 2714 return 0; 2715 return 32768; /* No limit, really; we're not buffering */ 2716} 2717 2718static int con_chars_in_buffer(struct tty_struct *tty) 2719{ 2720 return 0; /* we're not buffering */ 2721} 2722 2723/* 2724 * con_throttle and con_unthrottle are only used for 2725 * paste_selection(), which has to stuff in a large number of 2726 * characters... 2727 */ 2728static void con_throttle(struct tty_struct *tty) 2729{ 2730} 2731 2732static void con_unthrottle(struct tty_struct *tty) 2733{ 2734 struct vc_data *vc = tty->driver_data; 2735 2736 wake_up_interruptible(&vc->paste_wait); 2737} 2738 2739/* 2740 * Turn the Scroll-Lock LED on when the tty is stopped 2741 */ 2742static void con_stop(struct tty_struct *tty) 2743{ 2744 int console_num; 2745 if (!tty) 2746 return; 2747 console_num = tty->index; 2748 if (!vc_cons_allocated(console_num)) 2749 return; 2750 set_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK); 2751 set_leds(); 2752} 2753 2754/* 2755 * Turn the Scroll-Lock LED off when the console is started 2756 */ 2757static void con_start(struct tty_struct *tty) 2758{ 2759 int console_num; 2760 if (!tty) 2761 return; 2762 console_num = tty->index; 2763 if (!vc_cons_allocated(console_num)) 2764 return; 2765 clr_vc_kbd_led(kbd_table + console_num, VC_SCROLLOCK); 2766 set_leds(); 2767} 2768 2769static void con_flush_chars(struct tty_struct *tty) 2770{ 2771 struct vc_data *vc; 2772 2773 if (in_interrupt()) /* from flush_to_ldisc */ 2774 return; 2775 2776 /* if we race with con_close(), vt may be null */ 2777 acquire_console_sem(); 2778 vc = tty->driver_data; 2779 if (vc) 2780 set_cursor(vc); 2781 release_console_sem(); 2782} 2783 2784/* 2785 * Allocate the console screen memory. 2786 */ 2787static int con_open(struct tty_struct *tty, struct file *filp) 2788{ 2789 unsigned int currcons = tty->index; 2790 int ret = 0; 2791 2792 acquire_console_sem(); 2793 if (tty->driver_data == NULL) { 2794 ret = vc_allocate(currcons); 2795 if (ret == 0) { 2796 struct vc_data *vc = vc_cons[currcons].d; 2797 2798 /* Still being freed */ 2799 if (vc->port.tty) { 2800 release_console_sem(); 2801 return -ERESTARTSYS; 2802 } 2803 tty->driver_data = vc; 2804 vc->port.tty = tty; 2805 2806 if (!tty->winsize.ws_row && !tty->winsize.ws_col) { 2807 tty->winsize.ws_row = vc_cons[currcons].d->vc_rows; 2808 tty->winsize.ws_col = vc_cons[currcons].d->vc_cols; 2809 } 2810 if (vc->vc_utf) 2811 tty->termios->c_iflag |= IUTF8; 2812 else 2813 tty->termios->c_iflag &= ~IUTF8; 2814 release_console_sem(); 2815 return ret; 2816 } 2817 } 2818 release_console_sem(); 2819 return ret; 2820} 2821 2822static void con_close(struct tty_struct *tty, struct file *filp) 2823{ 2824 /* Nothing to do - we defer to shutdown */ 2825} 2826 2827static void con_shutdown(struct tty_struct *tty) 2828{ 2829 struct vc_data *vc = tty->driver_data; 2830 BUG_ON(vc == NULL); 2831 acquire_console_sem(); 2832 vc->port.tty = NULL; 2833 release_console_sem(); 2834 tty_shutdown(tty); 2835} 2836 2837static int default_italic_color = 2; // green (ASCII) 2838static int default_underline_color = 3; // cyan (ASCII) 2839module_param_named(italic, default_italic_color, int, S_IRUGO | S_IWUSR); 2840module_param_named(underline, default_underline_color, int, S_IRUGO | S_IWUSR); 2841 2842static void vc_init(struct vc_data *vc, unsigned int rows, 2843 unsigned int cols, int do_clear) 2844{ 2845 int j, k ; 2846 2847 vc->vc_cols = cols; 2848 vc->vc_rows = rows; 2849 vc->vc_size_row = cols << 1; 2850 vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row; 2851 2852 set_origin(vc); 2853 vc->vc_pos = vc->vc_origin; 2854 reset_vc(vc); 2855 for (j=k=0; j<16; j++) { 2856 vc->vc_palette[k++] = default_red[j] ; 2857 vc->vc_palette[k++] = default_grn[j] ; 2858 vc->vc_palette[k++] = default_blu[j] ; 2859 } 2860 vc->vc_def_color = 0x07; /* white */ 2861 vc->vc_ulcolor = default_underline_color; 2862 vc->vc_itcolor = default_italic_color; 2863 vc->vc_halfcolor = 0x08; /* grey */ 2864 init_waitqueue_head(&vc->paste_wait); 2865 reset_terminal(vc, do_clear); 2866} 2867 2868/* 2869 * This routine initializes console interrupts, and does nothing 2870 * else. If you want the screen to clear, call tty_write with 2871 * the appropriate escape-sequence. 2872 */ 2873 2874static int __init con_init(void) 2875{ 2876 const char *display_desc = NULL; 2877 struct vc_data *vc; 2878 unsigned int currcons = 0, i; 2879 2880 acquire_console_sem(); 2881 2882 if (conswitchp) 2883 display_desc = conswitchp->con_startup(); 2884 if (!display_desc) { 2885 fg_console = 0; 2886 release_console_sem(); 2887 return 0; 2888 } 2889 2890 for (i = 0; i < MAX_NR_CON_DRIVER; i++) { 2891 struct con_driver *con_driver = ®istered_con_driver[i]; 2892 2893 if (con_driver->con == NULL) { 2894 con_driver->con = conswitchp; 2895 con_driver->desc = display_desc; 2896 con_driver->flag = CON_DRIVER_FLAG_INIT; 2897 con_driver->first = 0; 2898 con_driver->last = MAX_NR_CONSOLES - 1; 2899 break; 2900 } 2901 } 2902 2903 for (i = 0; i < MAX_NR_CONSOLES; i++) 2904 con_driver_map[i] = conswitchp; 2905 2906 if (blankinterval) { 2907 blank_state = blank_normal_wait; 2908 mod_timer(&console_timer, jiffies + (blankinterval * HZ)); 2909 } 2910 2911 for (currcons = 0; currcons < MIN_NR_CONSOLES; currcons++) { 2912 vc_cons[currcons].d = vc = kzalloc(sizeof(struct vc_data), GFP_NOWAIT); 2913 INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK); 2914 tty_port_init(&vc->port); 2915 visual_init(vc, currcons, 1); 2916 vc->vc_screenbuf = kzalloc(vc->vc_screenbuf_size, GFP_NOWAIT); 2917 vc_init(vc, vc->vc_rows, vc->vc_cols, 2918 currcons || !vc->vc_sw->con_save_screen); 2919 } 2920 currcons = fg_console = 0; 2921 master_display_fg = vc = vc_cons[currcons].d; 2922 set_origin(vc); 2923 save_screen(vc); 2924 gotoxy(vc, vc->vc_x, vc->vc_y); 2925 csi_J(vc, 0); 2926 update_screen(vc); 2927 printk("Console: %s %s %dx%d", 2928 vc->vc_can_do_color ? "colour" : "mono", 2929 display_desc, vc->vc_cols, vc->vc_rows); 2930 printable = 1; 2931 printk("\n"); 2932 2933 release_console_sem(); 2934 2935#ifdef CONFIG_VT_CONSOLE 2936 register_console(&vt_console_driver); 2937#endif 2938 return 0; 2939} 2940console_initcall(con_init); 2941 2942static const struct tty_operations con_ops = { 2943 .open = con_open, 2944 .close = con_close, 2945 .write = con_write, 2946 .write_room = con_write_room, 2947 .put_char = con_put_char, 2948 .flush_chars = con_flush_chars, 2949 .chars_in_buffer = con_chars_in_buffer, 2950 .ioctl = vt_ioctl, 2951#ifdef CONFIG_COMPAT 2952 .compat_ioctl = vt_compat_ioctl, 2953#endif 2954 .stop = con_stop, 2955 .start = con_start, 2956 .throttle = con_throttle, 2957 .unthrottle = con_unthrottle, 2958 .resize = vt_resize, 2959 .shutdown = con_shutdown 2960}; 2961 2962static struct cdev vc0_cdev; 2963 2964int __init vty_init(const struct file_operations *console_fops) 2965{ 2966 cdev_init(&vc0_cdev, console_fops); 2967 if (cdev_add(&vc0_cdev, MKDEV(TTY_MAJOR, 0), 1) || 2968 register_chrdev_region(MKDEV(TTY_MAJOR, 0), 1, "/dev/vc/0") < 0) 2969 panic("Couldn't register /dev/tty0 driver\n"); 2970 device_create(tty_class, NULL, MKDEV(TTY_MAJOR, 0), NULL, "tty0"); 2971 2972 vcs_init(); 2973 2974 console_driver = alloc_tty_driver(MAX_NR_CONSOLES); 2975 if (!console_driver) 2976 panic("Couldn't allocate console driver\n"); 2977 console_driver->owner = THIS_MODULE; 2978 console_driver->name = "tty"; 2979 console_driver->name_base = 1; 2980 console_driver->major = TTY_MAJOR; 2981 console_driver->minor_start = 1; 2982 console_driver->type = TTY_DRIVER_TYPE_CONSOLE; 2983 console_driver->init_termios = tty_std_termios; 2984 if (default_utf8) 2985 console_driver->init_termios.c_iflag |= IUTF8; 2986 console_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_RESET_TERMIOS; 2987 tty_set_operations(console_driver, &con_ops); 2988 if (tty_register_driver(console_driver)) 2989 panic("Couldn't register console driver\n"); 2990 kbd_init(); 2991 console_map_init(); 2992#ifdef CONFIG_MDA_CONSOLE 2993 mda_console_init(); 2994#endif 2995 return 0; 2996} 2997 2998#ifndef VT_SINGLE_DRIVER 2999 3000static struct class *vtconsole_class; 3001 3002static int bind_con_driver(const struct consw *csw, int first, int last, 3003 int deflt) 3004{ 3005 struct module *owner = csw->owner; 3006 const char *desc = NULL; 3007 struct con_driver *con_driver; 3008 int i, j = -1, k = -1, retval = -ENODEV; 3009 3010 if (!try_module_get(owner)) 3011 return -ENODEV; 3012 3013 acquire_console_sem(); 3014 3015 /* check if driver is registered */ 3016 for (i = 0; i < MAX_NR_CON_DRIVER; i++) { 3017 con_driver = ®istered_con_driver[i]; 3018 3019 if (con_driver->con == csw) { 3020 desc = con_driver->desc; 3021 retval = 0; 3022 break; 3023 } 3024 } 3025 3026 if (retval) 3027 goto err; 3028 3029 if (!(con_driver->flag & CON_DRIVER_FLAG_INIT)) { 3030 csw->con_startup(); 3031 con_driver->flag |= CON_DRIVER_FLAG_INIT; 3032 } 3033 3034 if (deflt) { 3035 if (conswitchp) 3036 module_put(conswitchp->owner); 3037 3038 __module_get(owner); 3039 conswitchp = csw; 3040 } 3041 3042 first = max(first, con_driver->first); 3043 last = min(last, con_driver->last); 3044 3045 for (i = first; i <= last; i++) { 3046 int old_was_color; 3047 struct vc_data *vc = vc_cons[i].d; 3048 3049 if (con_driver_map[i]) 3050 module_put(con_driver_map[i]->owner); 3051 __module_get(owner); 3052 con_driver_map[i] = csw; 3053 3054 if (!vc || !vc->vc_sw) 3055 continue; 3056 3057 j = i; 3058 3059 if (CON_IS_VISIBLE(vc)) { 3060 k = i; 3061 save_screen(vc); 3062 } 3063 3064 old_was_color = vc->vc_can_do_color; 3065 vc->vc_sw->con_deinit(vc); 3066 vc->vc_origin = (unsigned long)vc->vc_screenbuf; 3067 visual_init(vc, i, 0); 3068 set_origin(vc); 3069 update_attr(vc); 3070 3071 /* If the console changed between mono <-> color, then 3072 * the attributes in the screenbuf will be wrong. The 3073 * following resets all attributes to something sane. 3074 */ 3075 if (old_was_color != vc->vc_can_do_color) 3076 clear_buffer_attributes(vc); 3077 } 3078 3079 printk("Console: switching "); 3080 if (!deflt) 3081 printk("consoles %d-%d ", first+1, last+1); 3082 if (j >= 0) { 3083 struct vc_data *vc = vc_cons[j].d; 3084 3085 printk("to %s %s %dx%d\n", 3086 vc->vc_can_do_color ? "colour" : "mono", 3087 desc, vc->vc_cols, vc->vc_rows); 3088 3089 if (k >= 0) { 3090 vc = vc_cons[k].d; 3091 update_screen(vc); 3092 } 3093 } else 3094 printk("to %s\n", desc); 3095 3096 retval = 0; 3097err: 3098 release_console_sem(); 3099 module_put(owner); 3100 return retval; 3101}; 3102 3103#ifdef CONFIG_VT_HW_CONSOLE_BINDING 3104static int con_is_graphics(const struct consw *csw, int first, int last) 3105{ 3106 int i, retval = 0; 3107 3108 for (i = first; i <= last; i++) { 3109 struct vc_data *vc = vc_cons[i].d; 3110 3111 if (vc && vc->vc_mode == KD_GRAPHICS) { 3112 retval = 1; 3113 break; 3114 } 3115 } 3116 3117 return retval; 3118} 3119 3120/** 3121 * unbind_con_driver - unbind a console driver 3122 * @csw: pointer to console driver to unregister 3123 * @first: first in range of consoles that @csw should be unbound from 3124 * @last: last in range of consoles that @csw should be unbound from 3125 * @deflt: should next bound console driver be default after @csw is unbound? 3126 * 3127 * To unbind a driver from all possible consoles, pass 0 as @first and 3128 * %MAX_NR_CONSOLES as @last. 3129 * 3130 * @deflt controls whether the console that ends up replacing @csw should be 3131 * the default console. 3132 * 3133 * RETURNS: 3134 * -ENODEV if @csw isn't a registered console driver or can't be unregistered 3135 * or 0 on success. 3136 */ 3137int unbind_con_driver(const struct consw *csw, int first, int last, int deflt) 3138{ 3139 struct module *owner = csw->owner; 3140 const struct consw *defcsw = NULL; 3141 struct con_driver *con_driver = NULL, *con_back = NULL; 3142 int i, retval = -ENODEV; 3143 3144 if (!try_module_get(owner)) 3145 return -ENODEV; 3146 3147 acquire_console_sem(); 3148 3149 /* check if driver is registered and if it is unbindable */ 3150 for (i = 0; i < MAX_NR_CON_DRIVER; i++) { 3151 con_driver = ®istered_con_driver[i]; 3152 3153 if (con_driver->con == csw && 3154 con_driver->flag & CON_DRIVER_FLAG_MODULE) { 3155 retval = 0; 3156 break; 3157 } 3158 } 3159 3160 if (retval) { 3161 release_console_sem(); 3162 goto err; 3163 } 3164 3165 retval = -ENODEV; 3166 3167 /* check if backup driver exists */ 3168 for (i = 0; i < MAX_NR_CON_DRIVER; i++) { 3169 con_back = ®istered_con_driver[i]; 3170 3171 if (con_back->con && 3172 !(con_back->flag & CON_DRIVER_FLAG_MODULE)) { 3173 defcsw = con_back->con; 3174 retval = 0; 3175 break; 3176 } 3177 } 3178 3179 if (retval) { 3180 release_console_sem(); 3181 goto err; 3182 } 3183 3184 if (!con_is_bound(csw)) { 3185 release_console_sem(); 3186 goto err; 3187 } 3188 3189 first = max(first, con_driver->first); 3190 last = min(last, con_driver->last); 3191 3192 for (i = first; i <= last; i++) { 3193 if (con_driver_map[i] == csw) { 3194 module_put(csw->owner); 3195 con_driver_map[i] = NULL; 3196 } 3197 } 3198 3199 if (!con_is_bound(defcsw)) { 3200 const struct consw *defconsw = conswitchp; 3201 3202 defcsw->con_startup(); 3203 con_back->flag |= CON_DRIVER_FLAG_INIT; 3204 /* 3205 * vgacon may change the default driver to point 3206 * to dummycon, we restore it here... 3207 */ 3208 conswitchp = defconsw; 3209 } 3210 3211 if (!con_is_bound(csw)) 3212 con_driver->flag &= ~CON_DRIVER_FLAG_INIT; 3213 3214 release_console_sem(); 3215 /* ignore return value, binding should not fail */ 3216 bind_con_driver(defcsw, first, last, deflt); 3217err: 3218 module_put(owner); 3219 return retval; 3220 3221} 3222EXPORT_SYMBOL(unbind_con_driver); 3223 3224static int vt_bind(struct con_driver *con) 3225{ 3226 const struct consw *defcsw = NULL, *csw = NULL; 3227 int i, more = 1, first = -1, last = -1, deflt = 0; 3228 3229 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) || 3230 con_is_graphics(con->con, con->first, con->last)) 3231 goto err; 3232 3233 csw = con->con; 3234 3235 for (i = 0; i < MAX_NR_CON_DRIVER; i++) { 3236 struct con_driver *con = ®istered_con_driver[i]; 3237 3238 if (con->con && !(con->flag & CON_DRIVER_FLAG_MODULE)) { 3239 defcsw = con->con; 3240 break; 3241 } 3242 } 3243 3244 if (!defcsw) 3245 goto err; 3246 3247 while (more) { 3248 more = 0; 3249 3250 for (i = con->first; i <= con->last; i++) { 3251 if (con_driver_map[i] == defcsw) { 3252 if (first == -1) 3253 first = i; 3254 last = i; 3255 more = 1; 3256 } else if (first != -1) 3257 break; 3258 } 3259 3260 if (first == 0 && last == MAX_NR_CONSOLES -1) 3261 deflt = 1; 3262 3263 if (first != -1) 3264 bind_con_driver(csw, first, last, deflt); 3265 3266 first = -1; 3267 last = -1; 3268 deflt = 0; 3269 } 3270 3271err: 3272 return 0; 3273} 3274 3275static int vt_unbind(struct con_driver *con) 3276{ 3277 const struct consw *csw = NULL; 3278 int i, more = 1, first = -1, last = -1, deflt = 0; 3279 3280 if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE) || 3281 con_is_graphics(con->con, con->first, con->last)) 3282 goto err; 3283 3284 csw = con->con; 3285 3286 while (more) { 3287 more = 0; 3288 3289 for (i = con->first; i <= con->last; i++) { 3290 if (con_driver_map[i] == csw) { 3291 if (first == -1) 3292 first = i; 3293 last = i; 3294 more = 1; 3295 } else if (first != -1) 3296 break; 3297 } 3298 3299 if (first == 0 && last == MAX_NR_CONSOLES -1) 3300 deflt = 1; 3301 3302 if (first != -1) 3303 unbind_con_driver(csw, first, last, deflt); 3304 3305 first = -1; 3306 last = -1; 3307 deflt = 0; 3308 } 3309 3310err: 3311 return 0; 3312} 3313#else 3314static inline int vt_bind(struct con_driver *con) 3315{ 3316 return 0; 3317} 3318static inline int vt_unbind(struct con_driver *con) 3319{ 3320 return 0; 3321} 3322#endif /* CONFIG_VT_HW_CONSOLE_BINDING */ 3323 3324static ssize_t store_bind(struct device *dev, struct device_attribute *attr, 3325 const char *buf, size_t count) 3326{ 3327 struct con_driver *con = dev_get_drvdata(dev); 3328 int bind = simple_strtoul(buf, NULL, 0); 3329 3330 if (bind) 3331 vt_bind(con); 3332 else 3333 vt_unbind(con); 3334 3335 return count; 3336} 3337 3338static ssize_t show_bind(struct device *dev, struct device_attribute *attr, 3339 char *buf) 3340{ 3341 struct con_driver *con = dev_get_drvdata(dev); 3342 int bind = con_is_bound(con->con); 3343 3344 return snprintf(buf, PAGE_SIZE, "%i\n", bind); 3345} 3346 3347static ssize_t show_name(struct device *dev, struct device_attribute *attr, 3348 char *buf) 3349{ 3350 struct con_driver *con = dev_get_drvdata(dev); 3351 3352 return snprintf(buf, PAGE_SIZE, "%s %s\n", 3353 (con->flag & CON_DRIVER_FLAG_MODULE) ? "(M)" : "(S)", 3354 con->desc); 3355 3356} 3357 3358static struct device_attribute device_attrs[] = { 3359 __ATTR(bind, S_IRUGO|S_IWUSR, show_bind, store_bind), 3360 __ATTR(name, S_IRUGO, show_name, NULL), 3361}; 3362 3363static int vtconsole_init_device(struct con_driver *con) 3364{ 3365 int i; 3366 int error = 0; 3367 3368 con->flag |= CON_DRIVER_FLAG_ATTR; 3369 dev_set_drvdata(con->dev, con); 3370 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) { 3371 error = device_create_file(con->dev, &device_attrs[i]); 3372 if (error) 3373 break; 3374 } 3375 3376 if (error) { 3377 while (--i >= 0) 3378 device_remove_file(con->dev, &device_attrs[i]); 3379 con->flag &= ~CON_DRIVER_FLAG_ATTR; 3380 } 3381 3382 return error; 3383} 3384 3385static void vtconsole_deinit_device(struct con_driver *con) 3386{ 3387 int i; 3388 3389 if (con->flag & CON_DRIVER_FLAG_ATTR) { 3390 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) 3391 device_remove_file(con->dev, &device_attrs[i]); 3392 con->flag &= ~CON_DRIVER_FLAG_ATTR; 3393 } 3394} 3395 3396/** 3397 * con_is_bound - checks if driver is bound to the console 3398 * @csw: console driver 3399 * 3400 * RETURNS: zero if unbound, nonzero if bound 3401 * 3402 * Drivers can call this and if zero, they should release 3403 * all resources allocated on con_startup() 3404 */ 3405int con_is_bound(const struct consw *csw) 3406{ 3407 int i, bound = 0; 3408 3409 for (i = 0; i < MAX_NR_CONSOLES; i++) { 3410 if (con_driver_map[i] == csw) { 3411 bound = 1; 3412 break; 3413 } 3414 } 3415 3416 return bound; 3417} 3418EXPORT_SYMBOL(con_is_bound); 3419 3420/** 3421 * con_debug_enter - prepare the console for the kernel debugger 3422 * @sw: console driver 3423 * 3424 * Called when the console is taken over by the kernel debugger, this 3425 * function needs to save the current console state, then put the console 3426 * into a state suitable for the kernel debugger. 3427 * 3428 * RETURNS: 3429 * Zero on success, nonzero if a failure occurred when trying to prepare 3430 * the console for the debugger. 3431 */ 3432int con_debug_enter(struct vc_data *vc) 3433{ 3434 int ret = 0; 3435 3436 saved_fg_console = fg_console; 3437 saved_last_console = last_console; 3438 saved_want_console = want_console; 3439 saved_vc_mode = vc->vc_mode; 3440 saved_console_blanked = console_blanked; 3441 vc->vc_mode = KD_TEXT; 3442 console_blanked = 0; 3443 if (vc->vc_sw->con_debug_enter) 3444 ret = vc->vc_sw->con_debug_enter(vc); 3445#ifdef CONFIG_KGDB_KDB 3446 /* Set the initial LINES variable if it is not already set */ 3447 if (vc->vc_rows < 999) { 3448 int linecount; 3449 char lns[4]; 3450 const char *setargs[3] = { 3451 "set", 3452 "LINES", 3453 lns, 3454 }; 3455 if (kdbgetintenv(setargs[0], &linecount)) { 3456 snprintf(lns, 4, "%i", vc->vc_rows); 3457 kdb_set(2, setargs); 3458 } 3459 } 3460#endif /* CONFIG_KGDB_KDB */ 3461 return ret; 3462} 3463EXPORT_SYMBOL_GPL(con_debug_enter); 3464 3465/** 3466 * con_debug_leave - restore console state 3467 * @sw: console driver 3468 * 3469 * Restore the console state to what it was before the kernel debugger 3470 * was invoked. 3471 * 3472 * RETURNS: 3473 * Zero on success, nonzero if a failure occurred when trying to restore 3474 * the console. 3475 */ 3476int con_debug_leave(void) 3477{ 3478 struct vc_data *vc; 3479 int ret = 0; 3480 3481 fg_console = saved_fg_console; 3482 last_console = saved_last_console; 3483 want_console = saved_want_console; 3484 console_blanked = saved_console_blanked; 3485 vc_cons[fg_console].d->vc_mode = saved_vc_mode; 3486 3487 vc = vc_cons[fg_console].d; 3488 if (vc->vc_sw->con_debug_leave) 3489 ret = vc->vc_sw->con_debug_leave(vc); 3490 return ret; 3491} 3492EXPORT_SYMBOL_GPL(con_debug_leave); 3493 3494/** 3495 * register_con_driver - register console driver to console layer 3496 * @csw: console driver 3497 * @first: the first console to take over, minimum value is 0 3498 * @last: the last console to take over, maximum value is MAX_NR_CONSOLES -1 3499 * 3500 * DESCRIPTION: This function registers a console driver which can later 3501 * bind to a range of consoles specified by @first and @last. It will 3502 * also initialize the console driver by calling con_startup(). 3503 */ 3504int register_con_driver(const struct consw *csw, int first, int last) 3505{ 3506 struct module *owner = csw->owner; 3507 struct con_driver *con_driver; 3508 const char *desc; 3509 int i, retval = 0; 3510 3511 if (!try_module_get(owner)) 3512 return -ENODEV; 3513 3514 acquire_console_sem(); 3515 3516 for (i = 0; i < MAX_NR_CON_DRIVER; i++) { 3517 con_driver = ®istered_con_driver[i]; 3518 3519 /* already registered */ 3520 if (con_driver->con == csw) 3521 retval = -EINVAL; 3522 } 3523 3524 if (retval) 3525 goto err; 3526 3527 desc = csw->con_startup(); 3528 3529 if (!desc) 3530 goto err; 3531 3532 retval = -EINVAL; 3533 3534 for (i = 0; i < MAX_NR_CON_DRIVER; i++) { 3535 con_driver = ®istered_con_driver[i]; 3536 3537 if (con_driver->con == NULL) { 3538 con_driver->con = csw; 3539 con_driver->desc = desc; 3540 con_driver->node = i; 3541 con_driver->flag = CON_DRIVER_FLAG_MODULE | 3542 CON_DRIVER_FLAG_INIT; 3543 con_driver->first = first; 3544 con_driver->last = last; 3545 retval = 0; 3546 break; 3547 } 3548 } 3549 3550 if (retval) 3551 goto err; 3552 3553 con_driver->dev = device_create(vtconsole_class, NULL, 3554 MKDEV(0, con_driver->node), 3555 NULL, "vtcon%i", 3556 con_driver->node); 3557 3558 if (IS_ERR(con_driver->dev)) { 3559 printk(KERN_WARNING "Unable to create device for %s; " 3560 "errno = %ld\n", con_driver->desc, 3561 PTR_ERR(con_driver->dev)); 3562 con_driver->dev = NULL; 3563 } else { 3564 vtconsole_init_device(con_driver); 3565 } 3566 3567err: 3568 release_console_sem(); 3569 module_put(owner); 3570 return retval; 3571} 3572EXPORT_SYMBOL(register_con_driver); 3573 3574/** 3575 * unregister_con_driver - unregister console driver from console layer 3576 * @csw: console driver 3577 * 3578 * DESCRIPTION: All drivers that registers to the console layer must 3579 * call this function upon exit, or if the console driver is in a state 3580 * where it won't be able to handle console services, such as the 3581 * framebuffer console without loaded framebuffer drivers. 3582 * 3583 * The driver must unbind first prior to unregistration. 3584 */ 3585int unregister_con_driver(const struct consw *csw) 3586{ 3587 int i, retval = -ENODEV; 3588 3589 acquire_console_sem(); 3590 3591 /* cannot unregister a bound driver */ 3592 if (con_is_bound(csw)) 3593 goto err; 3594 3595 for (i = 0; i < MAX_NR_CON_DRIVER; i++) { 3596 struct con_driver *con_driver = ®istered_con_driver[i]; 3597 3598 if (con_driver->con == csw && 3599 con_driver->flag & CON_DRIVER_FLAG_MODULE) { 3600 vtconsole_deinit_device(con_driver); 3601 device_destroy(vtconsole_class, 3602 MKDEV(0, con_driver->node)); 3603 con_driver->con = NULL; 3604 con_driver->desc = NULL; 3605 con_driver->dev = NULL; 3606 con_driver->node = 0; 3607 con_driver->flag = 0; 3608 con_driver->first = 0; 3609 con_driver->last = 0; 3610 retval = 0; 3611 break; 3612 } 3613 } 3614err: 3615 release_console_sem(); 3616 return retval; 3617} 3618EXPORT_SYMBOL(unregister_con_driver); 3619 3620/* 3621 * If we support more console drivers, this function is used 3622 * when a driver wants to take over some existing consoles 3623 * and become default driver for newly opened ones. 3624 * 3625 * take_over_console is basically a register followed by unbind 3626 */ 3627int take_over_console(const struct consw *csw, int first, int last, int deflt) 3628{ 3629 int err; 3630 3631 err = register_con_driver(csw, first, last); 3632 3633 if (!err) 3634 bind_con_driver(csw, first, last, deflt); 3635 3636 return err; 3637} 3638 3639/* 3640 * give_up_console is a wrapper to unregister_con_driver. It will only 3641 * work if driver is fully unbound. 3642 */ 3643void give_up_console(const struct consw *csw) 3644{ 3645 unregister_con_driver(csw); 3646} 3647 3648static int __init vtconsole_class_init(void) 3649{ 3650 int i; 3651 3652 vtconsole_class = class_create(THIS_MODULE, "vtconsole"); 3653 if (IS_ERR(vtconsole_class)) { 3654 printk(KERN_WARNING "Unable to create vt console class; " 3655 "errno = %ld\n", PTR_ERR(vtconsole_class)); 3656 vtconsole_class = NULL; 3657 } 3658 3659 /* Add system drivers to sysfs */ 3660 for (i = 0; i < MAX_NR_CON_DRIVER; i++) { 3661 struct con_driver *con = ®istered_con_driver[i]; 3662 3663 if (con->con && !con->dev) { 3664 con->dev = device_create(vtconsole_class, NULL, 3665 MKDEV(0, con->node), 3666 NULL, "vtcon%i", 3667 con->node); 3668 3669 if (IS_ERR(con->dev)) { 3670 printk(KERN_WARNING "Unable to create " 3671 "device for %s; errno = %ld\n", 3672 con->desc, PTR_ERR(con->dev)); 3673 con->dev = NULL; 3674 } else { 3675 vtconsole_init_device(con); 3676 } 3677 } 3678 } 3679 3680 return 0; 3681} 3682postcore_initcall(vtconsole_class_init); 3683 3684#endif 3685 3686/* 3687 * Screen blanking 3688 */ 3689 3690static int set_vesa_blanking(char __user *p) 3691{ 3692 unsigned int mode; 3693 3694 if (get_user(mode, p + 1)) 3695 return -EFAULT; 3696 3697 vesa_blank_mode = (mode < 4) ? mode : 0; 3698 return 0; 3699} 3700 3701void do_blank_screen(int entering_gfx) 3702{ 3703 struct vc_data *vc = vc_cons[fg_console].d; 3704 int i; 3705 3706 WARN_CONSOLE_UNLOCKED(); 3707 3708 if (console_blanked) { 3709 if (blank_state == blank_vesa_wait) { 3710 blank_state = blank_off; 3711 vc->vc_sw->con_blank(vc, vesa_blank_mode + 1, 0); 3712 } 3713 return; 3714 } 3715 3716 /* entering graphics mode? */ 3717 if (entering_gfx) { 3718 hide_cursor(vc); 3719 save_screen(vc); 3720 vc->vc_sw->con_blank(vc, -1, 1); 3721 console_blanked = fg_console + 1; 3722 blank_state = blank_off; 3723 set_origin(vc); 3724 return; 3725 } 3726 3727 if (blank_state != blank_normal_wait) 3728 return; 3729 blank_state = blank_off; 3730 3731 /* don't blank graphics */ 3732 if (vc->vc_mode != KD_TEXT) { 3733 console_blanked = fg_console + 1; 3734 return; 3735 } 3736 3737 hide_cursor(vc); 3738 del_timer_sync(&console_timer); 3739 blank_timer_expired = 0; 3740 3741 save_screen(vc); 3742 /* In case we need to reset origin, blanking hook returns 1 */ 3743 i = vc->vc_sw->con_blank(vc, vesa_off_interval ? 1 : (vesa_blank_mode + 1), 0); 3744 console_blanked = fg_console + 1; 3745 if (i) 3746 set_origin(vc); 3747 3748 if (console_blank_hook && console_blank_hook(1)) 3749 return; 3750 3751 if (vesa_off_interval && vesa_blank_mode) { 3752 blank_state = blank_vesa_wait; 3753 mod_timer(&console_timer, jiffies + vesa_off_interval); 3754 } 3755 vt_event_post(VT_EVENT_BLANK, vc->vc_num, vc->vc_num); 3756} 3757EXPORT_SYMBOL(do_blank_screen); 3758 3759/* 3760 * Called by timer as well as from vt_console_driver 3761 */ 3762void do_unblank_screen(int leaving_gfx) 3763{ 3764 struct vc_data *vc; 3765 3766 /* This should now always be called from a "sane" (read: can schedule) 3767 * context for the sake of the low level drivers, except in the special 3768 * case of oops_in_progress 3769 */ 3770 if (!oops_in_progress) 3771 might_sleep(); 3772 3773 WARN_CONSOLE_UNLOCKED(); 3774 3775 ignore_poke = 0; 3776 if (!console_blanked) 3777 return; 3778 if (!vc_cons_allocated(fg_console)) { 3779 /* impossible */ 3780 printk("unblank_screen: tty %d not allocated ??\n", fg_console+1); 3781 return; 3782 } 3783 vc = vc_cons[fg_console].d; 3784 /* Try to unblank in oops case too */ 3785 if (vc->vc_mode != KD_TEXT && !vt_force_oops_output(vc)) 3786 return; /* but leave console_blanked != 0 */ 3787 3788 if (blankinterval) { 3789 mod_timer(&console_timer, jiffies + (blankinterval * HZ)); 3790 blank_state = blank_normal_wait; 3791 } 3792 3793 console_blanked = 0; 3794 if (vc->vc_sw->con_blank(vc, 0, leaving_gfx) || vt_force_oops_output(vc)) 3795 /* Low-level driver cannot restore -> do it ourselves */ 3796 update_screen(vc); 3797 if (console_blank_hook) 3798 console_blank_hook(0); 3799 set_palette(vc); 3800 set_cursor(vc); 3801 vt_event_post(VT_EVENT_UNBLANK, vc->vc_num, vc->vc_num); 3802} 3803EXPORT_SYMBOL(do_unblank_screen); 3804 3805/* 3806 * This is called by the outside world to cause a forced unblank, mostly for 3807 * oopses. Currently, I just call do_unblank_screen(0), but we could eventually 3808 * call it with 1 as an argument and so force a mode restore... that may kill 3809 * X or at least garbage the screen but would also make the Oops visible... 3810 */ 3811void unblank_screen(void) 3812{ 3813 do_unblank_screen(0); 3814} 3815 3816/* 3817 * We defer the timer blanking to work queue so it can take the console mutex 3818 * (console operations can still happen at irq time, but only from printk which 3819 * has the console mutex. Not perfect yet, but better than no locking 3820 */ 3821static void blank_screen_t(unsigned long dummy) 3822{ 3823 if (unlikely(!keventd_up())) { 3824 mod_timer(&console_timer, jiffies + (blankinterval * HZ)); 3825 return; 3826 } 3827 blank_timer_expired = 1; 3828 schedule_work(&console_work); 3829} 3830 3831void poke_blanked_console(void) 3832{ 3833 WARN_CONSOLE_UNLOCKED(); 3834 3835 /* Add this so we quickly catch whoever might call us in a non 3836 * safe context. Nowadays, unblank_screen() isn't to be called in 3837 * atomic contexts and is allowed to schedule (with the special case 3838 * of oops_in_progress, but that isn't of any concern for this 3839 * function. --BenH. 3840 */ 3841 might_sleep(); 3842 3843 /* This isn't perfectly race free, but a race here would be mostly harmless, 3844 * at worse, we'll do a spurrious blank and it's unlikely 3845 */ 3846 del_timer(&console_timer); 3847 blank_timer_expired = 0; 3848 3849 if (ignore_poke || !vc_cons[fg_console].d || vc_cons[fg_console].d->vc_mode == KD_GRAPHICS) 3850 return; 3851 if (console_blanked) 3852 unblank_screen(); 3853 else if (blankinterval) { 3854 mod_timer(&console_timer, jiffies + (blankinterval * HZ)); 3855 blank_state = blank_normal_wait; 3856 } 3857} 3858 3859/* 3860 * Palettes 3861 */ 3862 3863static void set_palette(struct vc_data *vc) 3864{ 3865 WARN_CONSOLE_UNLOCKED(); 3866 3867 if (vc->vc_mode != KD_GRAPHICS) 3868 vc->vc_sw->con_set_palette(vc, color_table); 3869} 3870 3871static int set_get_cmap(unsigned char __user *arg, int set) 3872{ 3873 int i, j, k; 3874 3875 WARN_CONSOLE_UNLOCKED(); 3876 3877 for (i = 0; i < 16; i++) 3878 if (set) { 3879 get_user(default_red[i], arg++); 3880 get_user(default_grn[i], arg++); 3881 get_user(default_blu[i], arg++); 3882 } else { 3883 put_user(default_red[i], arg++); 3884 put_user(default_grn[i], arg++); 3885 put_user(default_blu[i], arg++); 3886 } 3887 if (set) { 3888 for (i = 0; i < MAX_NR_CONSOLES; i++) 3889 if (vc_cons_allocated(i)) { 3890 for (j = k = 0; j < 16; j++) { 3891 vc_cons[i].d->vc_palette[k++] = default_red[j]; 3892 vc_cons[i].d->vc_palette[k++] = default_grn[j]; 3893 vc_cons[i].d->vc_palette[k++] = default_blu[j]; 3894 } 3895 set_palette(vc_cons[i].d); 3896 } 3897 } 3898 return 0; 3899} 3900 3901/* 3902 * Load palette into the DAC registers. arg points to a colour 3903 * map, 3 bytes per colour, 16 colours, range from 0 to 255. 3904 */ 3905 3906int con_set_cmap(unsigned char __user *arg) 3907{ 3908 int rc; 3909 3910 acquire_console_sem(); 3911 rc = set_get_cmap (arg,1); 3912 release_console_sem(); 3913 3914 return rc; 3915} 3916 3917int con_get_cmap(unsigned char __user *arg) 3918{ 3919 int rc; 3920 3921 acquire_console_sem(); 3922 rc = set_get_cmap (arg,0); 3923 release_console_sem(); 3924 3925 return rc; 3926} 3927 3928void reset_palette(struct vc_data *vc) 3929{ 3930 int j, k; 3931 for (j=k=0; j<16; j++) { 3932 vc->vc_palette[k++] = default_red[j]; 3933 vc->vc_palette[k++] = default_grn[j]; 3934 vc->vc_palette[k++] = default_blu[j]; 3935 } 3936 set_palette(vc); 3937} 3938 3939/* 3940 * Font switching 3941 * 3942 * Currently we only support fonts up to 32 pixels wide, at a maximum height 3943 * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints, 3944 * depending on width) reserved for each character which is kinda wasty, but 3945 * this is done in order to maintain compatibility with the EGA/VGA fonts. It 3946 * is upto the actual low-level console-driver convert data into its favorite 3947 * format (maybe we should add a `fontoffset' field to the `display' 3948 * structure so we won't have to convert the fontdata all the time. 3949 * /Jes 3950 */ 3951 3952#define max_font_size 65536 3953 3954static int con_font_get(struct vc_data *vc, struct console_font_op *op) 3955{ 3956 struct console_font font; 3957 int rc = -EINVAL; 3958 int c; 3959 3960 if (vc->vc_mode != KD_TEXT) 3961 return -EINVAL; 3962 3963 if (op->data) { 3964 font.data = kmalloc(max_font_size, GFP_KERNEL); 3965 if (!font.data) 3966 return -ENOMEM; 3967 } else 3968 font.data = NULL; 3969 3970 acquire_console_sem(); 3971 if (vc->vc_sw->con_font_get) 3972 rc = vc->vc_sw->con_font_get(vc, &font); 3973 else 3974 rc = -ENOSYS; 3975 release_console_sem(); 3976 3977 if (rc) 3978 goto out; 3979 3980 c = (font.width+7)/8 * 32 * font.charcount; 3981 3982 if (op->data && font.charcount > op->charcount) 3983 rc = -ENOSPC; 3984 if (!(op->flags & KD_FONT_FLAG_OLD)) { 3985 if (font.width > op->width || font.height > op->height) 3986 rc = -ENOSPC; 3987 } else { 3988 if (font.width != 8) 3989 rc = -EIO; 3990 else if ((op->height && font.height > op->height) || 3991 font.height > 32) 3992 rc = -ENOSPC; 3993 } 3994 if (rc) 3995 goto out; 3996 3997 op->height = font.height; 3998 op->width = font.width; 3999 op->charcount = font.charcount; 4000 4001 if (op->data && copy_to_user(op->data, font.data, c)) 4002 rc = -EFAULT; 4003 4004out: 4005 kfree(font.data); 4006 return rc; 4007} 4008 4009static int con_font_set(struct vc_data *vc, struct console_font_op *op) 4010{ 4011 struct console_font font; 4012 int rc = -EINVAL; 4013 int size; 4014 4015 if (vc->vc_mode != KD_TEXT) 4016 return -EINVAL; 4017 if (!op->data) 4018 return -EINVAL; 4019 if (op->charcount > 512) 4020 return -EINVAL; 4021 if (!op->height) { /* Need to guess font height [compat] */ 4022 int h, i; 4023 u8 __user *charmap = op->data; 4024 u8 tmp; 4025 4026 /* If from KDFONTOP ioctl, don't allow things which can be done in userland, 4027 so that we can get rid of this soon */ 4028 if (!(op->flags & KD_FONT_FLAG_OLD)) 4029 return -EINVAL; 4030 for (h = 32; h > 0; h--) 4031 for (i = 0; i < op->charcount; i++) { 4032 if (get_user(tmp, &charmap[32*i+h-1])) 4033 return -EFAULT; 4034 if (tmp) 4035 goto nonzero; 4036 } 4037 return -EINVAL; 4038 nonzero: 4039 op->height = h; 4040 } 4041 if (op->width <= 0 || op->width > 32 || op->height > 32) 4042 return -EINVAL; 4043 size = (op->width+7)/8 * 32 * op->charcount; 4044 if (size > max_font_size) 4045 return -ENOSPC; 4046 font.charcount = op->charcount; 4047 font.height = op->height; 4048 font.width = op->width; 4049 font.data = memdup_user(op->data, size); 4050 if (IS_ERR(font.data)) 4051 return PTR_ERR(font.data); 4052 acquire_console_sem(); 4053 if (vc->vc_sw->con_font_set) 4054 rc = vc->vc_sw->con_font_set(vc, &font, op->flags); 4055 else 4056 rc = -ENOSYS; 4057 release_console_sem(); 4058 kfree(font.data); 4059 return rc; 4060} 4061 4062static int con_font_default(struct vc_data *vc, struct console_font_op *op) 4063{ 4064 struct console_font font = {.width = op->width, .height = op->height}; 4065 char name[MAX_FONT_NAME]; 4066 char *s = name; 4067 int rc; 4068 4069 if (vc->vc_mode != KD_TEXT) 4070 return -EINVAL; 4071 4072 if (!op->data) 4073 s = NULL; 4074 else if (strncpy_from_user(name, op->data, MAX_FONT_NAME - 1) < 0) 4075 return -EFAULT; 4076 else 4077 name[MAX_FONT_NAME - 1] = 0; 4078 4079 acquire_console_sem(); 4080 if (vc->vc_sw->con_font_default) 4081 rc = vc->vc_sw->con_font_default(vc, &font, s); 4082 else 4083 rc = -ENOSYS; 4084 release_console_sem(); 4085 if (!rc) { 4086 op->width = font.width; 4087 op->height = font.height; 4088 } 4089 return rc; 4090} 4091 4092static int con_font_copy(struct vc_data *vc, struct console_font_op *op) 4093{ 4094 int con = op->height; 4095 int rc; 4096 4097 if (vc->vc_mode != KD_TEXT) 4098 return -EINVAL; 4099 4100 acquire_console_sem(); 4101 if (!vc->vc_sw->con_font_copy) 4102 rc = -ENOSYS; 4103 else if (con < 0 || !vc_cons_allocated(con)) 4104 rc = -ENOTTY; 4105 else if (con == vc->vc_num) /* nothing to do */ 4106 rc = 0; 4107 else 4108 rc = vc->vc_sw->con_font_copy(vc, con); 4109 release_console_sem(); 4110 return rc; 4111} 4112 4113int con_font_op(struct vc_data *vc, struct console_font_op *op) 4114{ 4115 switch (op->op) { 4116 case KD_FONT_OP_SET: 4117 return con_font_set(vc, op); 4118 case KD_FONT_OP_GET: 4119 return con_font_get(vc, op); 4120 case KD_FONT_OP_SET_DEFAULT: 4121 return con_font_default(vc, op); 4122 case KD_FONT_OP_COPY: 4123 return con_font_copy(vc, op); 4124 } 4125 return -ENOSYS; 4126} 4127 4128/* 4129 * Interface exported to selection and vcs. 4130 */ 4131 4132/* used by selection */ 4133u16 screen_glyph(struct vc_data *vc, int offset) 4134{ 4135 u16 w = scr_readw(screenpos(vc, offset, 1)); 4136 u16 c = w & 0xff; 4137 4138 if (w & vc->vc_hi_font_mask) 4139 c |= 0x100; 4140 return c; 4141} 4142EXPORT_SYMBOL_GPL(screen_glyph); 4143 4144/* used by vcs - note the word offset */ 4145unsigned short *screen_pos(struct vc_data *vc, int w_offset, int viewed) 4146{ 4147 return screenpos(vc, 2 * w_offset, viewed); 4148} 4149 4150void getconsxy(struct vc_data *vc, unsigned char *p) 4151{ 4152 p[0] = vc->vc_x; 4153 p[1] = vc->vc_y; 4154} 4155 4156void putconsxy(struct vc_data *vc, unsigned char *p) 4157{ 4158 hide_cursor(vc); 4159 gotoxy(vc, p[0], p[1]); 4160 set_cursor(vc); 4161} 4162 4163u16 vcs_scr_readw(struct vc_data *vc, const u16 *org) 4164{ 4165 if ((unsigned long)org == vc->vc_pos && softcursor_original != -1) 4166 return softcursor_original; 4167 return scr_readw(org); 4168} 4169 4170void vcs_scr_writew(struct vc_data *vc, u16 val, u16 *org) 4171{ 4172 scr_writew(val, org); 4173 if ((unsigned long)org == vc->vc_pos) { 4174 softcursor_original = -1; 4175 add_softcursor(vc); 4176 } 4177} 4178 4179/* 4180 * Visible symbols for modules 4181 */ 4182 4183EXPORT_SYMBOL(color_table); 4184EXPORT_SYMBOL(default_red); 4185EXPORT_SYMBOL(default_grn); 4186EXPORT_SYMBOL(default_blu); 4187EXPORT_SYMBOL(update_region); 4188EXPORT_SYMBOL(redraw_screen); 4189EXPORT_SYMBOL(vc_resize); 4190EXPORT_SYMBOL(fg_console); 4191EXPORT_SYMBOL(console_blank_hook); 4192EXPORT_SYMBOL(console_blanked); 4193EXPORT_SYMBOL(vc_cons); 4194EXPORT_SYMBOL(global_cursor_default); 4195#ifndef VT_SINGLE_DRIVER 4196EXPORT_SYMBOL(take_over_console); 4197EXPORT_SYMBOL(give_up_console); 4198#endif 4199