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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 | /* * linux/drivers/video/fbcon.h -- Low level frame buffer based console driver * * Copyright (C) 1997 Geert Uytterhoeven * * This file is subject to the terms and conditions of the GNU General Public * License. See the file COPYING in the main directory of this archive * for more details. */ #ifndef _VIDEO_FBCON_H #define _VIDEO_FBCON_H #include <linux/config.h> #include <linux/types.h> #include <linux/console_struct.h> #include <linux/vt_buffer.h> #include <asm/io.h> /* * `switch' for the Low Level Operations */ struct display_switch { void (*setup)(struct display *p); void (*bmove)(struct display *p, int sy, int sx, int dy, int dx, int height, int width); /* for clear, conp may be NULL, which means use a blanking (black) color */ void (*clear)(struct vc_data *conp, struct display *p, int sy, int sx, int height, int width); void (*putc)(struct vc_data *conp, struct display *p, int c, int yy, int xx); void (*putcs)(struct vc_data *conp, struct display *p, const unsigned short *s, int count, int yy, int xx); void (*revc)(struct display *p, int xx, int yy); void (*cursor)(struct display *p, int mode, int xx, int yy); int (*set_font)(struct display *p, int width, int height); void (*clear_margins)(struct vc_data *conp, struct display *p, int bottom_only); unsigned int fontwidthmask; /* 1 at (1 << (width - 1)) if width is supported */ }; extern struct display_switch fbcon_dummy; /* * This is the interface between the low-level console driver and the * low-level frame buffer device */ struct display { /* Filled in by the frame buffer device */ struct fb_var_screeninfo var; /* variable infos. yoffset and vmode */ /* are updated by fbcon.c */ struct fb_cmap cmap; /* colormap */ char *screen_base; /* pointer to top of virtual screen */ /* (virtual address) */ int visual; int type; /* see FB_TYPE_* */ int type_aux; /* Interleave for interleaved Planes */ u_short ypanstep; /* zero if no hardware ypan */ u_short ywrapstep; /* zero if no hardware ywrap */ u_long line_length; /* length of a line in bytes */ u_short can_soft_blank; /* zero if no hardware blanking */ u_short inverse; /* != 0 text black on white as default */ struct display_switch *dispsw; /* low level operations */ void *dispsw_data; /* optional dispsw helper data */ #if 0 struct fb_fix_cursorinfo fcrsr; struct fb_var_cursorinfo *vcrsr; struct fb_cursorstate crsrstate; #endif /* Filled in by the low-level console driver */ struct vc_data *conp; /* pointer to console data */ struct fb_info *fb_info; /* frame buffer for this console */ int vrows; /* number of virtual rows */ unsigned short cursor_x; /* current cursor position */ unsigned short cursor_y; int fgcol; /* text colors */ int bgcol; u_long next_line; /* offset to one line below */ u_long next_plane; /* offset to next plane */ u_char *fontdata; /* Font associated to this display */ unsigned short _fontheightlog; unsigned short _fontwidthlog; unsigned short _fontheight; unsigned short _fontwidth; int userfont; /* != 0 if fontdata kmalloc()ed */ u_short scrollmode; /* Scroll Method */ short yscroll; /* Hardware scrolling */ unsigned char fgshift, bgshift; unsigned short charmask; /* 0xff or 0x1ff */ }; /* drivers/video/fbcon.c */ extern struct display fb_display[MAX_NR_CONSOLES]; extern char con2fb_map[MAX_NR_CONSOLES]; extern int PROC_CONSOLE(const struct fb_info *info); extern void set_con2fb_map(int unit, int newidx); extern int set_all_vcs(int fbidx, struct fb_ops *fb, struct fb_var_screeninfo *var, struct fb_info *info); #define fontheight(p) ((p)->_fontheight) #define fontheightlog(p) ((p)->_fontheightlog) #ifdef CONFIG_FBCON_FONTWIDTH8_ONLY /* fontwidth w is supported by dispsw */ #define FONTWIDTH(w) (1 << ((8) - 1)) /* fontwidths w1-w2 inclusive are supported by dispsw */ #define FONTWIDTHRANGE(w1,w2) FONTWIDTH(8) #define fontwidth(p) (8) #define fontwidthlog(p) (0) #else /* fontwidth w is supported by dispsw */ #define FONTWIDTH(w) (1 << ((w) - 1)) /* fontwidths w1-w2 inclusive are supported by dispsw */ #define FONTWIDTHRANGE(w1,w2) (FONTWIDTH(w2+1) - FONTWIDTH(w1)) #define fontwidth(p) ((p)->_fontwidth) #define fontwidthlog(p) ((p)->_fontwidthlog) #endif /* * Attribute Decoding */ /* Color */ #define attr_fgcol(p,s) \ (((s) >> ((p)->fgshift)) & 0x0f) #define attr_bgcol(p,s) \ (((s) >> ((p)->bgshift)) & 0x0f) #define attr_bgcol_ec(p,conp) \ ((conp) ? (((conp)->vc_video_erase_char >> ((p)->bgshift)) & 0x0f) : 0) /* Monochrome */ #define attr_bold(p,s) \ ((s) & 0x200) #define attr_reverse(p,s) \ (((s) & 0x800) ^ ((p)->inverse ? 0x800 : 0)) #define attr_underline(p,s) \ ((s) & 0x400) #define attr_blink(p,s) \ ((s) & 0x8000) /* * Scroll Method */ /* Internal flags */ #define __SCROLL_YPAN 0x001 #define __SCROLL_YWRAP 0x002 #define __SCROLL_YMOVE 0x003 #define __SCROLL_YREDRAW 0x004 #define __SCROLL_YMASK 0x00f #define __SCROLL_YFIXED 0x010 #define __SCROLL_YNOMOVE 0x020 #define __SCROLL_YPANREDRAW 0x040 #define __SCROLL_YNOPARTIAL 0x080 /* Only these should be used by the drivers */ /* Which one should you use? If you have a fast card and slow bus, then probably just 0 to indicate fbcon should choose between YWRAP/YPAN+MOVE/YMOVE. On the other side, if you have a fast bus and even better if your card can do fonting (1->8/32bit painting), you should consider either SCROLL_YREDRAW (if your card is able to do neither YPAN/YWRAP), or SCROLL_YNOMOVE. The best is to test it with some real life scrolling (usually, not all lines on the screen are filled completely with non-space characters, and REDRAW performs much better on such lines, so don't cat a file with every line covering all screen columns, it would not be the right benchmark). */ #define SCROLL_YREDRAW (__SCROLL_YFIXED|__SCROLL_YREDRAW) #define SCROLL_YNOMOVE (__SCROLL_YNOMOVE|__SCROLL_YPANREDRAW) /* SCROLL_YNOPARTIAL, used in combination with the above, is for video cards which can not handle using panning to scroll a portion of the screen without excessive flicker. Panning will only be used for whole screens. */ /* Namespace consistency */ #define SCROLL_YNOPARTIAL __SCROLL_YNOPARTIAL #if defined(__sparc__) /* We map all of our framebuffers such that big-endian accesses * are what we want, so the following is sufficient. */ #define fb_readb sbus_readb #define fb_readw sbus_readw #define fb_readl sbus_readl #define fb_writeb sbus_writeb #define fb_writew sbus_writew #define fb_writel sbus_writel #define fb_memset sbus_memset_io #elif defined(__i386__) || defined(__alpha__) #define fb_readb __raw_readb #define fb_readw __raw_readw #define fb_readl __raw_readl #define fb_writeb __raw_writeb #define fb_writew __raw_writew #define fb_writel __raw_writel #define fb_memset memset_io #else #define fb_readb(addr) (*(volatile u8 *) (addr)) #define fb_readw(addr) (*(volatile u16 *) (addr)) #define fb_readl(addr) (*(volatile u32 *) (addr)) #define fb_writeb(b,addr) (*(volatile u8 *) (addr) = (b)) #define fb_writew(b,addr) (*(volatile u16 *) (addr) = (b)) #define fb_writel(b,addr) (*(volatile u32 *) (addr) = (b)) #define fb_memset memset #endif extern void fbcon_redraw_clear(struct vc_data *, struct display *, int, int, int, int); extern void fbcon_redraw_bmove(struct display *, int, int, int, int, int, int); /* ================================================================= */ /* Utility Assembler Functions */ /* ================================================================= */ #if defined(__mc68000__) /* ====================================================================== */ /* Those of a delicate disposition might like to skip the next couple of * pages. * * These functions are drop in replacements for memmove and * memset(_, 0, _). However their five instances add at least a kilobyte * to the object file. You have been warned. * * Not a great fan of assembler for the sake of it, but I think * that these routines are at least 10 times faster than their C * equivalents for large blits, and that's important to the lowest level of * a graphics driver. Question is whether some scheme with the blitter * would be faster. I suspect not for simple text system - not much * asynchrony. * * Code is very simple, just gruesome expansion. Basic strategy is to * increase data moved/cleared at each step to 16 bytes to reduce * instruction per data move overhead. movem might be faster still * For more than 15 bytes, we try to align the write direction on a * longword boundary to get maximum speed. This is even more gruesome. * Unaligned read/write used requires 68020+ - think this is a problem? * * Sorry! */ /* ++roman: I've optimized Robert's original versions in some minor * aspects, e.g. moveq instead of movel, let gcc choose the registers, * use movem in some places... * For other modes than 1 plane, lots of more such assembler functions * were needed (e.g. the ones using movep or expanding color values). */ /* ++andreas: more optimizations: subl #65536,d0 replaced by clrw d0; subql #1,d0 for dbcc addal is faster than addaw movep is rather expensive compared to ordinary move's some functions rewritten in C for clarity, no speed loss */ static __inline__ void *fb_memclear_small(void *s, size_t count) { if (!count) return(0); __asm__ __volatile__( "lsrl #1,%1 ; jcc 1f ; moveb %2,%0@-\n\t" "1: lsrl #1,%1 ; jcc 1f ; movew %2,%0@-\n\t" "1: lsrl #1,%1 ; jcc 1f ; movel %2,%0@-\n\t" "1: lsrl #1,%1 ; jcc 1f ; movel %2,%0@- ; movel %2,%0@-\n\t" "1:" : "=a" (s), "=d" (count) : "d" (0), "0" ((char *)s+count), "1" (count) ); __asm__ __volatile__( "subql #1,%1 ; jcs 3f\n\t" "movel %2,%%d4; movel %2,%%d5; movel %2,%%d6\n\t" "2: moveml %2/%%d4/%%d5/%%d6,%0@-\n\t" "dbra %1,2b\n\t" "3:" : "=a" (s), "=d" (count) : "d" (0), "0" (s), "1" (count) : "d4", "d5", "d6" ); return(0); } static __inline__ void *fb_memclear(void *s, size_t count) { if (!count) return(0); if (count < 16) { __asm__ __volatile__( "lsrl #1,%1 ; jcc 1f ; clrb %0@+\n\t" "1: lsrl #1,%1 ; jcc 1f ; clrw %0@+\n\t" "1: lsrl #1,%1 ; jcc 1f ; clrl %0@+\n\t" "1: lsrl #1,%1 ; jcc 1f ; clrl %0@+ ; clrl %0@+\n\t" "1:" : "=a" (s), "=d" (count) : "0" (s), "1" (count) ); } else { long tmp; __asm__ __volatile__( "movel %1,%2\n\t" "lsrl #1,%2 ; jcc 1f ; clrb %0@+ ; subqw #1,%1\n\t" "lsrl #1,%2 ; jcs 2f\n\t" /* %0 increased=>bit 2 switched*/ "clrw %0@+ ; subqw #2,%1 ; jra 2f\n\t" "1: lsrl #1,%2 ; jcc 2f\n\t" "clrw %0@+ ; subqw #2,%1\n\t" "2: movew %1,%2; lsrl #2,%1 ; jeq 6f\n\t" "lsrl #1,%1 ; jcc 3f ; clrl %0@+\n\t" "3: lsrl #1,%1 ; jcc 4f ; clrl %0@+ ; clrl %0@+\n\t" "4: subql #1,%1 ; jcs 6f\n\t" "5: clrl %0@+; clrl %0@+ ; clrl %0@+ ; clrl %0@+\n\t" "dbra %1,5b ; clrw %1; subql #1,%1; jcc 5b\n\t" "6: movew %2,%1; btst #1,%1 ; jeq 7f ; clrw %0@+\n\t" "7: ; btst #0,%1 ; jeq 8f ; clrb %0@+\n\t" "8:" : "=a" (s), "=d" (count), "=d" (tmp) : "0" (s), "1" (count) ); } return(0); } static __inline__ void *fb_memset255(void *s, size_t count) { if (!count) return(0); __asm__ __volatile__( "lsrl #1,%1 ; jcc 1f ; moveb %2,%0@-\n\t" "1: lsrl #1,%1 ; jcc 1f ; movew %2,%0@-\n\t" "1: lsrl #1,%1 ; jcc 1f ; movel %2,%0@-\n\t" "1: lsrl #1,%1 ; jcc 1f ; movel %2,%0@- ; movel %2,%0@-\n\t" "1:" : "=a" (s), "=d" (count) : "d" (-1), "0" ((char *)s+count), "1" (count) ); __asm__ __volatile__( "subql #1,%1 ; jcs 3f\n\t" "movel %2,%%d4; movel %2,%%d5; movel %2,%%d6\n\t" "2: moveml %2/%%d4/%%d5/%%d6,%0@-\n\t" "dbra %1,2b\n\t" "3:" : "=a" (s), "=d" (count) : "d" (-1), "0" (s), "1" (count) : "d4", "d5", "d6" ); return(0); } static __inline__ void *fb_memmove(void *d, const void *s, size_t count) { if (d < s) { if (count < 16) { __asm__ __volatile__( "lsrl #1,%2 ; jcc 1f ; moveb %1@+,%0@+\n\t" "1: lsrl #1,%2 ; jcc 1f ; movew %1@+,%0@+\n\t" "1: lsrl #1,%2 ; jcc 1f ; movel %1@+,%0@+\n\t" "1: lsrl #1,%2 ; jcc 1f ; movel %1@+,%0@+ ; movel %1@+,%0@+\n\t" "1:" : "=a" (d), "=a" (s), "=d" (count) : "0" (d), "1" (s), "2" (count) ); } else { long tmp; __asm__ __volatile__( "movel %0,%3\n\t" "lsrl #1,%3 ; jcc 1f ; moveb %1@+,%0@+ ; subqw #1,%2\n\t" "lsrl #1,%3 ; jcs 2f\n\t" /* %0 increased=>bit 2 switched*/ "movew %1@+,%0@+ ; subqw #2,%2 ; jra 2f\n\t" "1: lsrl #1,%3 ; jcc 2f\n\t" "movew %1@+,%0@+ ; subqw #2,%2\n\t" "2: movew %2,%-; lsrl #2,%2 ; jeq 6f\n\t" "lsrl #1,%2 ; jcc 3f ; movel %1@+,%0@+\n\t" "3: lsrl #1,%2 ; jcc 4f ; movel %1@+,%0@+ ; movel %1@+,%0@+\n\t" "4: subql #1,%2 ; jcs 6f\n\t" "5: movel %1@+,%0@+;movel %1@+,%0@+\n\t" "movel %1@+,%0@+;movel %1@+,%0@+\n\t" "dbra %2,5b ; clrw %2; subql #1,%2; jcc 5b\n\t" "6: movew %+,%2; btst #1,%2 ; jeq 7f ; movew %1@+,%0@+\n\t" "7: ; btst #0,%2 ; jeq 8f ; moveb %1@+,%0@+\n\t" "8:" : "=a" (d), "=a" (s), "=d" (count), "=d" (tmp) : "0" (d), "1" (s), "2" (count) ); } } else { if (count < 16) { __asm__ __volatile__( "lsrl #1,%2 ; jcc 1f ; moveb %1@-,%0@-\n\t" "1: lsrl #1,%2 ; jcc 1f ; movew %1@-,%0@-\n\t" "1: lsrl #1,%2 ; jcc 1f ; movel %1@-,%0@-\n\t" "1: lsrl #1,%2 ; jcc 1f ; movel %1@-,%0@- ; movel %1@-,%0@-\n\t" "1:" : "=a" (d), "=a" (s), "=d" (count) : "0" ((char *) d + count), "1" ((char *) s + count), "2" (count) ); } else { long tmp; __asm__ __volatile__( "movel %0,%3\n\t" "lsrl #1,%3 ; jcc 1f ; moveb %1@-,%0@- ; subqw #1,%2\n\t" "lsrl #1,%3 ; jcs 2f\n\t" /* %0 increased=>bit 2 switched*/ "movew %1@-,%0@- ; subqw #2,%2 ; jra 2f\n\t" "1: lsrl #1,%3 ; jcc 2f\n\t" "movew %1@-,%0@- ; subqw #2,%2\n\t" "2: movew %2,%-; lsrl #2,%2 ; jeq 6f\n\t" "lsrl #1,%2 ; jcc 3f ; movel %1@-,%0@-\n\t" "3: lsrl #1,%2 ; jcc 4f ; movel %1@-,%0@- ; movel %1@-,%0@-\n\t" "4: subql #1,%2 ; jcs 6f\n\t" "5: movel %1@-,%0@-;movel %1@-,%0@-\n\t" "movel %1@-,%0@-;movel %1@-,%0@-\n\t" "dbra %2,5b ; clrw %2; subql #1,%2; jcc 5b\n\t" "6: movew %+,%2; btst #1,%2 ; jeq 7f ; movew %1@-,%0@-\n\t" "7: ; btst #0,%2 ; jeq 8f ; moveb %1@-,%0@-\n\t" "8:" : "=a" (d), "=a" (s), "=d" (count), "=d" (tmp) : "0" ((char *) d + count), "1" ((char *) s + count), "2" (count) ); } } return(0); } /* ++andreas: Simple and fast version of memmove, assumes size is divisible by 16, suitable for moving the whole screen bitplane */ static __inline__ void fast_memmove(char *dst, const char *src, size_t size) { if (!size) return; if (dst < src) __asm__ __volatile__ ("1:" " moveml %0@+,%/d0/%/d1/%/a0/%/a1\n" " moveml %/d0/%/d1/%/a0/%/a1,%1@\n" " addql #8,%1; addql #8,%1\n" " dbra %2,1b\n" " clrw %2; subql #1,%2\n" " jcc 1b" : "=a" (src), "=a" (dst), "=d" (size) : "0" (src), "1" (dst), "2" (size / 16 - 1) : "d0", "d1", "a0", "a1", "memory"); else __asm__ __volatile__ ("1:" " subql #8,%0; subql #8,%0\n" " moveml %0@,%/d0/%/d1/%/a0/%/a1\n" " moveml %/d0/%/d1/%/a0/%/a1,%1@-\n" " dbra %2,1b\n" " clrw %2; subql #1,%2\n" " jcc 1b" : "=a" (src), "=a" (dst), "=d" (size) : "0" (src + size), "1" (dst + size), "2" (size / 16 - 1) : "d0", "d1", "a0", "a1", "memory"); } #elif defined(CONFIG_SUN4) /* You may think that I'm crazy and that I should use generic routines. No, I'm not: sun4's framebuffer crashes if we std into it, so we cannot use memset. */ static __inline__ void *sun4_memset(void *s, char val, size_t count) { int i; for(i=0; i<count;i++) ((char *) s) [i] = val; return s; } static __inline__ void *fb_memset255(void *s, size_t count) { return sun4_memset(s, 255, count); } static __inline__ void *fb_memclear(void *s, size_t count) { return sun4_memset(s, 0, count); } static __inline__ void *fb_memclear_small(void *s, size_t count) { return sun4_memset(s, 0, count); } /* To be honest, this is slow_memmove :). But sun4 is crappy, so what we can do. */ static __inline__ void fast_memmove(void *d, const void *s, size_t count) { int i; if (d<s) { for (i=0; i<count; i++) ((char *) d)[i] = ((char *) s)[i]; } else for (i=0; i<count; i++) ((char *) d)[count-i-1] = ((char *) s)[count-i-1]; } static __inline__ void *fb_memmove(char *dst, const char *src, size_t size) { fast_memmove(dst, src, size); return dst; } #else static __inline__ void *fb_memclear_small(void *s, size_t count) { char *xs = (char *) s; while (count--) fb_writeb(0, xs++); return s; } static __inline__ void *fb_memclear(void *s, size_t count) { unsigned long xs = (unsigned long) s; if (count < 8) goto rest; if (xs & 1) { fb_writeb(0, xs++); count--; } if (xs & 2) { fb_writew(0, xs); xs += 2; count -= 2; } while (count > 3) { fb_writel(0, xs); xs += 4; count -= 4; } rest: while (count--) fb_writeb(0, xs++); return s; } static __inline__ void *fb_memset255(void *s, size_t count) { unsigned long xs = (unsigned long) s; if (count < 8) goto rest; if (xs & 1) { fb_writeb(0xff, xs++); count--; } if (xs & 2) { fb_writew(0xffff, xs); xs += 2; count -= 2; } while (count > 3) { fb_writel(0xffffffff, xs); xs += 4; count -= 4; } rest: while (count--) fb_writeb(0xff, xs++); return s; } #if defined(__i386__) static __inline__ void fast_memmove(void *d, const void *s, size_t count) { int d0, d1, d2, d3; if (d < s) { __asm__ __volatile__ ( "cld\n\t" "shrl $1,%%ecx\n\t" "jnc 1f\n\t" "movsb\n" "1:\tshrl $1,%%ecx\n\t" "jnc 2f\n\t" "movsw\n" "2:\trep\n\t" "movsl" : "=&c" (d0), "=&D" (d1), "=&S" (d2) :"0"(count),"1"((long)d),"2"((long)s) :"memory"); } else { __asm__ __volatile__ ( "std\n\t" "shrl $1,%%ecx\n\t" "jnc 1f\n\t" "movb 3(%%esi),%%al\n\t" "movb %%al,3(%%edi)\n\t" "decl %%esi\n\t" "decl %%edi\n" "1:\tshrl $1,%%ecx\n\t" "jnc 2f\n\t" "movw 2(%%esi),%%ax\n\t" "movw %%ax,2(%%edi)\n\t" "decl %%esi\n\t" "decl %%edi\n\t" "decl %%esi\n\t" "decl %%edi\n" "2:\trep\n\t" "movsl\n\t" "cld" : "=&c" (d0), "=&D" (d1), "=&S" (d2), "=&a" (d3) :"0"(count),"1"(count-4+(long)d),"2"(count-4+(long)s) :"memory"); } } static __inline__ void *fb_memmove(char *dst, const char *src, size_t size) { fast_memmove(dst, src, size); return dst; } #else /* !__i386__ */ /* * Anyone who'd like to write asm functions for other CPUs? * (Why are these functions better than those from include/asm/string.h?) */ static __inline__ void *fb_memmove(void *d, const void *s, size_t count) { unsigned long dst, src; if (d < s) { dst = (unsigned long) d; src = (unsigned long) s; if ((count < 8) || ((dst ^ src) & 3)) goto restup; if (dst & 1) { fb_writeb(fb_readb(src++), dst++); count--; } if (dst & 2) { fb_writew(fb_readw(src), dst); src += 2; dst += 2; count -= 2; } while (count > 3) { fb_writel(fb_readl(src), dst); src += 4; dst += 4; count -= 4; } restup: while (count--) fb_writeb(fb_readb(src++), dst++); } else { dst = (unsigned long) d + count; src = (unsigned long) s + count; if ((count < 8) || ((dst ^ src) & 3)) goto restdown; if (dst & 1) { src--; dst--; count--; fb_writeb(fb_readb(src), dst); } if (dst & 2) { src -= 2; dst -= 2; count -= 2; fb_writew(fb_readw(src), dst); } while (count > 3) { src -= 4; dst -= 4; count -= 4; fb_writel(fb_readl(src), dst); } restdown: while (count--) { src--; dst--; fb_writeb(fb_readb(src), dst); } } return d; } static __inline__ void fast_memmove(char *d, const char *s, size_t count) { unsigned long dst, src; if (d < s) { dst = (unsigned long) d; src = (unsigned long) s; if ((count < 8) || ((dst ^ src) & 3)) goto restup; if (dst & 1) { fb_writeb(fb_readb(src++), dst++); count--; } if (dst & 2) { fb_writew(fb_readw(src), dst); src += 2; dst += 2; count -= 2; } while (count > 3) { fb_writel(fb_readl(src), dst); src += 4; dst += 4; count -= 4; } restup: while (count--) fb_writeb(fb_readb(src++), dst++); } else { dst = (unsigned long) d + count; src = (unsigned long) s + count; if ((count < 8) || ((dst ^ src) & 3)) goto restdown; if (dst & 1) { src--; dst--; count--; fb_writeb(fb_readb(src), dst); } if (dst & 2) { src -= 2; dst -= 2; count -= 2; fb_writew(fb_readw(src), dst); } while (count > 3) { src -= 4; dst -= 4; count -= 4; fb_writel(fb_readl(src), dst); } restdown: while (count--) { src--; dst--; fb_writeb(fb_readb(src), dst); } } } #endif /* !__i386__ */ #endif /* !__mc68000__ */ #endif /* _VIDEO_FBCON_H */ |