1 // VGA bios implementation
3 // Copyright (C) 2009 Kevin O'Connor <kevin@koconnor.net>
4 // Copyright (C) 2001-2008 the LGPL VGABios developers Team
6 // This file may be distributed under the terms of the GNU LGPLv3 license.
10 // * review correctness of converted asm by comparing with RBIL
12 // * convert vbe/clext code
14 #include "bregs.h" // struct bregs
15 #include "biosvar.h" // GET_BDA
16 #include "util.h" // memset
17 #include "vgatables.h" // find_vga_entry
21 #define CONFIG_CIRRUS 0
24 #define DEBUG_VGA_POST 1
25 #define DEBUG_VGA_10 3
27 #define SET_VGA(var, val) SET_FARVAR(get_global_seg(), (var), (val))
30 /****************************************************************
32 ****************************************************************/
35 call16_vgaint(u32 eax, u32 ebx)
47 perform_gray_scale_summing(u16 start, u16 count)
49 vgahw_screen_disable();
51 for (i = start; i < start+count; i++) {
53 vgahw_get_dac_regs(GET_SEG(SS), rgb, i, 1);
55 // intensity = ( 0.3 * Red ) + ( 0.59 * Green ) + ( 0.11 * Blue )
56 u16 intensity = ((77 * rgb[0] + 151 * rgb[1] + 28 * rgb[2]) + 0x80) >> 8;
60 vgahw_set_dac_regs(GET_SEG(SS), rgb, i, 1);
62 vgahw_screen_enable();
66 set_cursor_shape(u8 start, u8 end)
71 u16 curs = (start << 8) + end;
72 SET_BDA(cursor_type, curs);
74 u8 modeset_ctl = GET_BDA(modeset_ctl);
75 u16 cheight = GET_BDA(char_height);
76 if ((modeset_ctl & 0x01) && (cheight > 8) && (end < 8) && (start < 0x20)) {
77 if (end != (start + 1))
78 start = ((start + 1) * cheight / 8) - 1;
80 start = ((end + 1) * cheight / 8) - 2;
81 end = ((end + 1) * cheight / 8) - 1;
83 vgahw_set_cursor_shape(start, end);
87 get_cursor_shape(u8 page)
91 // FIXME should handle VGA 14/16 lines
92 return GET_BDA(cursor_type);
96 set_cursor_pos(struct cursorpos cp)
98 // Should not happen...
103 SET_BDA(cursor_pos[cp.page], (cp.y << 8) | cp.x);
105 // Set the hardware cursor
106 u8 current = GET_BDA(video_page);
107 if (cp.page != current)
110 // Get the dimensions
111 u16 nbcols = GET_BDA(video_cols);
112 u16 nbrows = GET_BDA(video_rows) + 1;
114 // Calculate the address knowing nbcols nbrows and page num
115 u16 address = (SCREEN_IO_START(nbcols, nbrows, cp.page)
116 + cp.x + cp.y * nbcols);
118 vgahw_set_cursor_pos(address);
121 static struct cursorpos
122 get_cursor_pos(u8 page)
125 // special case - use current page
126 page = GET_BDA(video_page);
128 struct cursorpos cp = { 0, 0, 0xfe };
131 // FIXME should handle VGA 14/16 lines
132 u16 xy = GET_BDA(cursor_pos[page]);
133 struct cursorpos cp = {xy, xy>>8, page};
138 set_active_page(u8 page)
144 struct vgamode_s *vmode_g = find_vga_entry(GET_BDA(video_mode));
148 // Get pos curs pos for the right page
149 struct cursorpos cp = get_cursor_pos(page);
152 if (GET_GLOBAL(vmode_g->memmodel) & TEXT) {
153 // Get the dimensions
154 u16 nbcols = GET_BDA(video_cols);
155 u16 nbrows = GET_BDA(video_rows) + 1;
157 // Calculate the address knowing nbcols nbrows and page num
158 address = SCREEN_MEM_START(nbcols, nbrows, page);
159 SET_BDA(video_pagestart, address);
162 address = SCREEN_IO_START(nbcols, nbrows, page);
164 struct VideoParam_s *vparam_g = GET_GLOBAL(vmode_g->vparam);
165 address = page * GET_GLOBAL(vparam_g->slength);
168 vgahw_set_active_page(address);
170 // And change the BIOS page
171 SET_BDA(video_page, page);
173 dprintf(1, "Set active page %02x address %04x\n", page, address);
175 // Display the cursor, now the page is active
180 set_scan_lines(u8 lines)
182 vgahw_set_scan_lines(lines);
184 set_cursor_shape(0x06, 0x07);
186 set_cursor_shape(lines - 4, lines - 3);
187 SET_BDA(char_height, lines);
188 u16 vde = vgahw_get_vde();
189 u8 rows = vde / lines;
190 SET_BDA(video_rows, rows - 1);
191 u16 cols = GET_BDA(video_cols);
192 SET_BDA(video_pagesize, rows * cols * 2);
196 /****************************************************************
198 ****************************************************************/
200 // Scroll the screen one line. This function is designed to be called
201 // tail-recursive to reduce stack usage.
203 scroll_one(u16 nbrows, u16 nbcols, u8 page)
205 struct cursorpos ul = {0, 0, page};
206 struct cursorpos lr = {nbcols-1, nbrows-1, page};
207 vgafb_scroll(1, -1, ul, lr);
210 // Write a character to the screen at a given position. Implement
211 // special characters and scroll the screen if necessary.
213 write_teletype(struct cursorpos *pcp, struct carattr ca)
215 struct cursorpos cp = *pcp;
217 // Get the dimensions
218 u16 nbrows = GET_BDA(video_rows) + 1;
219 u16 nbcols = GET_BDA(video_cols);
237 struct carattr dummyca = {' ', ca.attr, ca.use_attr};
238 vgafb_write_char(cp, dummyca);
240 } while (cp.x < nbcols && cp.x % 8);
243 vgafb_write_char(cp, ca);
247 // Do we need to wrap ?
248 if (cp.x == nbcols) {
252 // Do we need to scroll ?
260 scroll_one(nbrows, nbcols, cp.page);
263 // Write out a buffer of alternating characters and attributes.
265 write_attr_string(struct cursorpos *pcp, u16 count, u16 seg, u8 *offset_far)
268 u8 car = GET_FARVAR(seg, *offset_far);
270 u8 attr = GET_FARVAR(seg, *offset_far);
273 struct carattr ca = {car, attr, 1};
274 write_teletype(pcp, ca);
278 // Write out a buffer of characters.
280 write_string(struct cursorpos *pcp, u8 attr, u16 count, u16 seg, u8 *offset_far)
283 u8 car = GET_FARVAR(seg, *offset_far);
286 struct carattr ca = {car, attr, 1};
287 write_teletype(pcp, ca);
292 /****************************************************************
293 * Save and restore bda state
294 ****************************************************************/
297 save_bda_state(u16 seg, struct saveBDAstate *info)
299 SET_FARVAR(seg, info->video_mode, GET_BDA(video_mode));
300 SET_FARVAR(seg, info->video_cols, GET_BDA(video_cols));
301 SET_FARVAR(seg, info->video_pagesize, GET_BDA(video_pagesize));
302 SET_FARVAR(seg, info->crtc_address, GET_BDA(crtc_address));
303 SET_FARVAR(seg, info->video_rows, GET_BDA(video_rows));
304 SET_FARVAR(seg, info->char_height, GET_BDA(char_height));
305 SET_FARVAR(seg, info->video_ctl, GET_BDA(video_ctl));
306 SET_FARVAR(seg, info->video_switches, GET_BDA(video_switches));
307 SET_FARVAR(seg, info->modeset_ctl, GET_BDA(modeset_ctl));
308 SET_FARVAR(seg, info->cursor_type, GET_BDA(cursor_type));
311 SET_FARVAR(seg, info->cursor_pos[i], GET_BDA(cursor_pos[i]));
312 SET_FARVAR(seg, info->video_pagestart, GET_BDA(video_pagestart));
313 SET_FARVAR(seg, info->video_page, GET_BDA(video_page));
315 SET_FARVAR(seg, info->font0, GET_IVT(0x1f));
316 SET_FARVAR(seg, info->font1, GET_IVT(0x43));
320 restore_bda_state(u16 seg, struct saveBDAstate *info)
322 SET_BDA(video_mode, GET_FARVAR(seg, info->video_mode));
323 SET_BDA(video_cols, GET_FARVAR(seg, info->video_cols));
324 SET_BDA(video_pagesize, GET_FARVAR(seg, info->video_pagesize));
325 SET_BDA(crtc_address, GET_FARVAR(seg, info->crtc_address));
326 SET_BDA(video_rows, GET_FARVAR(seg, info->video_rows));
327 SET_BDA(char_height, GET_FARVAR(seg, info->char_height));
328 SET_BDA(video_ctl, GET_FARVAR(seg, info->video_ctl));
329 SET_BDA(video_switches, GET_FARVAR(seg, info->video_switches));
330 SET_BDA(modeset_ctl, GET_FARVAR(seg, info->modeset_ctl));
331 SET_BDA(cursor_type, GET_FARVAR(seg, info->cursor_type));
333 for (i = 0; i < 8; i++)
334 SET_BDA(cursor_pos[i], GET_FARVAR(seg, info->cursor_pos[i]));
335 SET_BDA(video_pagestart, GET_FARVAR(seg, info->video_pagestart));
336 SET_BDA(video_page, GET_FARVAR(seg, info->video_page));
338 SET_IVT(0x1f, GET_FARVAR(seg, info->font0));
339 SET_IVT(0x43, GET_FARVAR(seg, info->font1));
343 /****************************************************************
345 ****************************************************************/
349 handle_1000(struct bregs *regs)
351 u8 noclearmem = regs->al & 0x80;
352 u8 mode = regs->al & 0x7f;
363 cirrus_set_video_mode(mode);
366 if (vbe_has_vbe_display())
367 dispi_set_enable(VBE_DISPI_DISABLED);
369 // find the entry in the video modes
370 struct vgamode_s *vmode_g = find_vga_entry(mode);
371 dprintf(1, "mode search %02x found %p\n", mode, vmode_g);
375 // Read the bios mode set control
376 u8 modeset_ctl = GET_BDA(modeset_ctl);
378 // Then we know the number of lines
381 // if palette loading (bit 3 of modeset ctl = 0)
382 if ((modeset_ctl & 0x08) == 0) { // Set the PEL mask
383 vgahw_set_pel_mask(GET_GLOBAL(vmode_g->pelmask));
385 // From which palette
386 u8 *palette_g = GET_GLOBAL(vmode_g->dac);
387 u16 palsize = GET_GLOBAL(vmode_g->dacsize) / 3;
389 // Always 256*3 values
390 vgahw_set_dac_regs(get_global_seg(), palette_g, 0, palsize);
392 for (i = palsize; i < 0x0100; i++) {
393 static u8 rgb[3] VAR16;
394 vgahw_set_dac_regs(get_global_seg(), rgb, i, 1);
397 if ((modeset_ctl & 0x02) == 0x02)
398 perform_gray_scale_summing(0x00, 0x100);
401 struct VideoParam_s *vparam_g = GET_GLOBAL(vmode_g->vparam);
402 vgahw_set_mode(vparam_g);
404 if (noclearmem == 0x00)
405 clear_screen(vmode_g);
407 // Set CRTC address VGA or MDA
408 u16 crtc_addr = VGAREG_VGA_CRTC_ADDRESS;
409 if (GET_GLOBAL(vmode_g->memmodel) == MTEXT)
410 crtc_addr = VGAREG_MDA_CRTC_ADDRESS;
413 u16 cheight = GET_GLOBAL(vparam_g->cheight);
414 SET_BDA(video_mode, mode);
415 SET_BDA(video_cols, GET_GLOBAL(vparam_g->twidth));
416 SET_BDA(video_pagesize, GET_GLOBAL(vparam_g->slength));
417 SET_BDA(crtc_address, crtc_addr);
418 SET_BDA(video_rows, GET_GLOBAL(vparam_g->theightm1));
419 SET_BDA(char_height, cheight);
420 SET_BDA(video_ctl, (0x60 | noclearmem));
421 SET_BDA(video_switches, 0xF9);
422 SET_BDA(modeset_ctl, GET_BDA(modeset_ctl) & 0x7f);
424 // FIXME We nearly have the good tables. to be reworked
425 SET_BDA(dcc_index, 0x08); // 8 is VGA should be ok for now
426 SET_BDA(video_savetable
427 , SEGOFF(get_global_seg(), (u32)video_save_pointer_table));
430 SET_BDA(video_msr, 0x00); // Unavailable on vanilla vga, but...
431 SET_BDA(video_pal, 0x00); // Unavailable on vanilla vga, but...
434 if (GET_GLOBAL(vmode_g->memmodel) & TEXT)
435 set_cursor_shape(0x06, 0x07);
436 // Set cursor pos for page 0..7
438 for (i = 0; i < 8; i++) {
439 struct cursorpos cp = {0, 0, i};
444 set_active_page(0x00);
446 // Write the fonts in memory
447 if (GET_GLOBAL(vmode_g->memmodel) & TEXT) {
448 call16_vgaint(0x1104, 0);
449 call16_vgaint(0x1103, 0);
451 // Set the ints 0x1F and 0x43
452 SET_IVT(0x1f, SEGOFF(get_global_seg(), (u32)&vgafont8[128 * 8]));
456 SET_IVT(0x43, SEGOFF(get_global_seg(), (u32)vgafont8));
459 SET_IVT(0x43, SEGOFF(get_global_seg(), (u32)vgafont14));
462 SET_IVT(0x43, SEGOFF(get_global_seg(), (u32)vgafont16));
468 handle_1001(struct bregs *regs)
470 set_cursor_shape(regs->ch, regs->cl);
474 handle_1002(struct bregs *regs)
476 struct cursorpos cp = {regs->dl, regs->dh, regs->bh};
481 handle_1003(struct bregs *regs)
483 regs->cx = get_cursor_shape(regs->bh);
484 struct cursorpos cp = get_cursor_pos(regs->bh);
489 // Read light pen pos (unimplemented)
491 handle_1004(struct bregs *regs)
494 regs->ax = regs->bx = regs->cx = regs->dx = 0;
498 handle_1005(struct bregs *regs)
500 set_active_page(regs->al);
504 verify_scroll(struct bregs *regs, int dir)
506 u8 page = GET_BDA(video_page);
507 struct cursorpos ul = {regs->cl, regs->ch, page};
508 struct cursorpos lr = {regs->dl, regs->dh, page};
510 u16 nbrows = GET_BDA(video_rows) + 1;
513 u16 nbcols = GET_BDA(video_cols);
517 if (ul.x > lr.x || ul.y > lr.y)
520 u16 nblines = regs->al;
521 if (!nblines || nblines > lr.y - ul.y + 1)
522 nblines = lr.y - ul.y + 1;
524 vgafb_scroll(dir * nblines, regs->bh, ul, lr);
528 handle_1006(struct bregs *regs)
530 verify_scroll(regs, 1);
534 handle_1007(struct bregs *regs)
536 verify_scroll(regs, -1);
540 handle_1008(struct bregs *regs)
542 struct carattr ca = vgafb_read_char(get_cursor_pos(regs->bh));
548 write_chars(u8 page, struct carattr ca, u16 count)
550 struct cursorpos cp = get_cursor_pos(page);
552 vgafb_write_char(cp, ca);
558 handle_1009(struct bregs *regs)
560 struct carattr ca = {regs->al, regs->bl, 1};
561 write_chars(regs->bh, ca, regs->cx);
565 handle_100a(struct bregs *regs)
567 struct carattr ca = {regs->al, regs->bl, 0};
568 write_chars(regs->bh, ca, regs->cx);
573 handle_100b00(struct bregs *regs)
575 vgahw_set_border_color(regs->bl);
579 handle_100b01(struct bregs *regs)
581 vgahw_set_palette(regs->bl);
585 handle_100bXX(struct bregs *regs)
591 handle_100b(struct bregs *regs)
594 case 0x00: handle_100b00(regs); break;
595 case 0x01: handle_100b01(regs); break;
596 default: handle_100bXX(regs); break;
602 handle_100c(struct bregs *regs)
604 // XXX - page (regs->bh) is unused
605 vgafb_write_pixel(regs->al, regs->cx, regs->dx);
609 handle_100d(struct bregs *regs)
611 // XXX - page (regs->bh) is unused
612 regs->al = vgafb_read_pixel(regs->cx, regs->dx);
616 handle_100e(struct bregs *regs)
618 // Ralf Brown Interrupt list is WRONG on bh(page)
619 // We do output only on the current page !
620 struct carattr ca = {regs->al, regs->bl, 0};
621 struct cursorpos cp = get_cursor_pos(0xff);
622 write_teletype(&cp, ca);
627 handle_100f(struct bregs *regs)
629 regs->bh = GET_BDA(video_page);
630 regs->al = GET_BDA(video_mode) | (GET_BDA(video_ctl) & 0x80);
631 regs->ah = GET_BDA(video_cols);
636 handle_101000(struct bregs *regs)
640 vgahw_set_single_palette_reg(regs->bl, regs->bh);
644 handle_101001(struct bregs *regs)
646 vgahw_set_overscan_border_color(regs->bh);
650 handle_101002(struct bregs *regs)
652 vgahw_set_all_palette_reg(regs->es, (u8*)(regs->dx + 0));
656 handle_101003(struct bregs *regs)
658 vgahw_toggle_intensity(regs->bl);
662 handle_101007(struct bregs *regs)
666 regs->bh = vgahw_get_single_palette_reg(regs->bl);
670 handle_101008(struct bregs *regs)
672 regs->bh = vgahw_get_overscan_border_color();
676 handle_101009(struct bregs *regs)
678 vgahw_get_all_palette_reg(regs->es, (u8*)(regs->dx + 0));
682 handle_101010(struct bregs *regs)
684 u8 rgb[3] = {regs->dh, regs->ch, regs->cl};
685 vgahw_set_dac_regs(GET_SEG(SS), rgb, regs->bx, 1);
689 handle_101012(struct bregs *regs)
691 vgahw_set_dac_regs(regs->es, (u8*)(regs->dx + 0), regs->bx, regs->cx);
695 handle_101013(struct bregs *regs)
697 vgahw_select_video_dac_color_page(regs->bl, regs->bh);
701 handle_101015(struct bregs *regs)
704 vgahw_get_dac_regs(GET_SEG(SS), rgb, regs->bx, 1);
711 handle_101017(struct bregs *regs)
713 vgahw_get_dac_regs(regs->es, (u8*)(regs->dx + 0), regs->bx, regs->cx);
717 handle_101018(struct bregs *regs)
719 vgahw_set_pel_mask(regs->bl);
723 handle_101019(struct bregs *regs)
725 regs->bl = vgahw_get_pel_mask();
729 handle_10101a(struct bregs *regs)
731 vgahw_read_video_dac_state(®s->bl, ®s->bh);
735 handle_10101b(struct bregs *regs)
737 perform_gray_scale_summing(regs->bx, regs->cx);
741 handle_1010XX(struct bregs *regs)
747 handle_1010(struct bregs *regs)
750 case 0x00: handle_101000(regs); break;
751 case 0x01: handle_101001(regs); break;
752 case 0x02: handle_101002(regs); break;
753 case 0x03: handle_101003(regs); break;
754 case 0x07: handle_101007(regs); break;
755 case 0x08: handle_101008(regs); break;
756 case 0x09: handle_101009(regs); break;
757 case 0x10: handle_101010(regs); break;
758 case 0x12: handle_101012(regs); break;
759 case 0x13: handle_101013(regs); break;
760 case 0x15: handle_101015(regs); break;
761 case 0x17: handle_101017(regs); break;
762 case 0x18: handle_101018(regs); break;
763 case 0x19: handle_101019(regs); break;
764 case 0x1a: handle_10101a(regs); break;
765 case 0x1b: handle_10101b(regs); break;
766 default: handle_1010XX(regs); break;
772 handle_101100(struct bregs *regs)
774 vgafb_load_font(regs->es, (void*)(regs->bp+0), regs->cx
775 , regs->dx, regs->bl, regs->bh);
779 handle_101101(struct bregs *regs)
781 vgafb_load_font(get_global_seg(), vgafont14, 0x100, 0, regs->bl, 14);
785 handle_101102(struct bregs *regs)
787 vgafb_load_font(get_global_seg(), vgafont8, 0x100, 0, regs->bl, 8);
791 handle_101103(struct bregs *regs)
793 vgahw_set_text_block_specifier(regs->bl);
797 handle_101104(struct bregs *regs)
799 vgafb_load_font(get_global_seg(), vgafont16, 0x100, 0, regs->bl, 16);
803 handle_101110(struct bregs *regs)
805 vgafb_load_font(regs->es, (void*)(regs->bp+0), regs->cx
806 , regs->dx, regs->bl, regs->bh);
807 set_scan_lines(regs->bh);
811 handle_101111(struct bregs *regs)
813 vgafb_load_font(get_global_seg(), vgafont14, 0x100, 0, regs->bl, 14);
818 handle_101112(struct bregs *regs)
820 vgafb_load_font(get_global_seg(), vgafont8, 0x100, 0, regs->bl, 8);
825 handle_101114(struct bregs *regs)
827 vgafb_load_font(get_global_seg(), vgafont16, 0x100, 0, regs->bl, 16);
832 handle_101130(struct bregs *regs)
836 struct segoff_s so = GET_IVT(0x1f);
838 regs->bp = so.offset;
842 struct segoff_s so = GET_IVT(0x43);
844 regs->bp = so.offset;
848 regs->es = get_global_seg();
849 regs->bp = (u32)vgafont14;
852 regs->es = get_global_seg();
853 regs->bp = (u32)vgafont8;
856 regs->es = get_global_seg();
857 regs->bp = (u32)vgafont8 + 128 * 8;
860 regs->es = get_global_seg();
861 regs->bp = (u32)vgafont14alt;
864 regs->es = get_global_seg();
865 regs->bp = (u32)vgafont16;
868 regs->es = get_global_seg();
869 regs->bp = (u32)vgafont16alt;
872 dprintf(1, "Get font info BH(%02x) was discarded\n", regs->bh);
875 // Set byte/char of on screen font
876 regs->cx = GET_BDA(char_height) & 0xff;
878 // Set Highest char row
879 regs->dx = GET_BDA(video_rows);
883 handle_1011XX(struct bregs *regs)
889 handle_1011(struct bregs *regs)
892 case 0x00: handle_101100(regs); break;
893 case 0x01: handle_101101(regs); break;
894 case 0x02: handle_101102(regs); break;
895 case 0x03: handle_101103(regs); break;
896 case 0x04: handle_101104(regs); break;
897 case 0x10: handle_101110(regs); break;
898 case 0x11: handle_101111(regs); break;
899 case 0x12: handle_101112(regs); break;
900 case 0x14: handle_101114(regs); break;
901 case 0x30: handle_101130(regs); break;
902 default: handle_1011XX(regs); break;
908 handle_101210(struct bregs *regs)
910 u16 crtc_addr = GET_BDA(crtc_address);
911 if (crtc_addr == VGAREG_MDA_CRTC_ADDRESS)
915 regs->cx = GET_BDA(video_switches) & 0x0f;
919 handle_101230(struct bregs *regs)
921 u8 mctl = GET_BDA(modeset_ctl);
922 u8 vswt = GET_BDA(video_switches);
926 mctl = (mctl & ~0x10) | 0x80;
927 vswt = (vswt & ~0x0f) | 0x08;
932 vswt = (vswt & ~0x0f) | 0x09;
936 mctl = (mctl & ~0x80) | 0x10;
937 vswt = (vswt & ~0x0f) | 0x09;
940 dprintf(1, "Select vert res (%02x) was discarded\n", regs->al);
943 SET_BDA(modeset_ctl, mctl);
944 SET_BDA(video_switches, vswt);
949 handle_101231(struct bregs *regs)
951 u8 v = (regs->al & 0x01) << 3;
952 u8 mctl = GET_BDA(video_ctl) & ~0x08;
953 SET_BDA(video_ctl, mctl | v);
958 handle_101232(struct bregs *regs)
960 vgahw_enable_video_addressing(regs->al);
965 handle_101233(struct bregs *regs)
967 u8 v = ((regs->al << 1) & 0x02) ^ 0x02;
968 u8 v2 = GET_BDA(modeset_ctl) & ~0x02;
969 SET_BDA(modeset_ctl, v | v2);
974 handle_101234(struct bregs *regs)
976 u8 v = (regs->al & 0x01) ^ 0x01;
977 u8 v2 = GET_BDA(modeset_ctl) & ~0x01;
978 SET_BDA(modeset_ctl, v | v2);
983 handle_101235(struct bregs *regs)
990 handle_101236(struct bregs *regs)
997 handle_1012XX(struct bregs *regs)
1003 handle_1012(struct bregs *regs)
1006 case 0x10: handle_101210(regs); break;
1007 case 0x30: handle_101230(regs); break;
1008 case 0x31: handle_101231(regs); break;
1009 case 0x32: handle_101232(regs); break;
1010 case 0x33: handle_101233(regs); break;
1011 case 0x34: handle_101234(regs); break;
1012 case 0x35: handle_101235(regs); break;
1013 case 0x36: handle_101236(regs); break;
1014 default: handle_1012XX(regs); break;
1017 // XXX - cirrus has 1280, 1281, 1282, 1285, 129a, 12a0, 12a1, 12a2, 12ae
1022 static void noinline
1023 handle_1013(struct bregs *regs)
1025 struct cursorpos cp = {regs->dl, regs->dh, regs->bh};
1026 // if row=0xff special case : use current cursor position
1028 cp = get_cursor_pos(cp.page);
1031 write_attr_string(&cp, regs->cx, regs->es, (void*)(regs->bp + 0));
1033 write_string(&cp, regs->bl, regs->cx, regs->es, (void*)(regs->bp + 0));
1041 handle_101a00(struct bregs *regs)
1043 regs->bx = GET_BDA(dcc_index);
1048 handle_101a01(struct bregs *regs)
1050 SET_BDA(dcc_index, regs->bl);
1051 dprintf(1, "Alternate Display code (%02x) was discarded\n", regs->bh);
1056 handle_101aXX(struct bregs *regs)
1062 handle_101a(struct bregs *regs)
1065 case 0x00: handle_101a00(regs); break;
1066 case 0x01: handle_101a01(regs); break;
1067 default: handle_101aXX(regs); break;
1073 u16 static_functionality_off;
1074 u16 static_functionality_seg;
1094 handle_101b(struct bregs *regs)
1097 struct funcInfo *info = (void*)(regs->di+0);
1098 memset_far(seg, info, 0, sizeof(*info));
1099 // Address of static functionality table
1100 SET_FARVAR(seg, info->static_functionality_off, (u32)static_functionality);
1101 SET_FARVAR(seg, info->static_functionality_seg, get_global_seg());
1103 // Hard coded copy from BIOS area. Should it be cleaner ?
1104 memcpy_far(seg, info->bda_0x49, SEG_BDA, (void*)0x49
1105 , sizeof(info->bda_0x49));
1106 memcpy_far(seg, info->bda_0x84, SEG_BDA, (void*)0x84
1107 , sizeof(info->bda_0x84));
1109 SET_FARVAR(seg, info->dcc_index, GET_BDA(dcc_index));
1110 SET_FARVAR(seg, info->colors, 16);
1111 SET_FARVAR(seg, info->pages, 8);
1112 SET_FARVAR(seg, info->scan_lines, 2);
1113 SET_FARVAR(seg, info->video_mem, 3);
1119 handle_101c00(struct bregs *regs)
1121 u16 flags = regs->cx;
1124 size += sizeof(struct saveVideoHardware);
1126 size += sizeof(struct saveBDAstate);
1128 size += sizeof(struct saveDACcolors);
1134 handle_101c01(struct bregs *regs)
1136 u16 flags = regs->cx;
1138 void *data = (void*)(regs->bx+0);
1140 vgahw_save_state(seg, data);
1141 data += sizeof(struct saveVideoHardware);
1144 save_bda_state(seg, data);
1145 data += sizeof(struct saveBDAstate);
1148 vgahw_save_dac_state(seg, data);
1153 handle_101c02(struct bregs *regs)
1155 u16 flags = regs->cx;
1157 void *data = (void*)(regs->bx+0);
1159 vgahw_restore_state(seg, data);
1160 data += sizeof(struct saveVideoHardware);
1163 restore_bda_state(seg, data);
1164 data += sizeof(struct saveBDAstate);
1167 vgahw_restore_dac_state(seg, data);
1172 handle_101cXX(struct bregs *regs)
1178 handle_101c(struct bregs *regs)
1181 case 0x00: handle_101c00(regs); break;
1182 case 0x01: handle_101c01(regs); break;
1183 case 0x02: handle_101c02(regs); break;
1184 default: handle_101cXX(regs); break;
1190 handle_104f00(struct bregs *regs)
1192 // XXX - vbe_biosfn_return_controller_information(&AX,ES,DI);
1193 // XXX - OR cirrus_vesa_00h
1197 handle_104f01(struct bregs *regs)
1199 // XXX - vbe_biosfn_return_mode_information(&AX,CX,ES,DI);
1200 // XXX - OR cirrus_vesa_01h
1204 handle_104f02(struct bregs *regs)
1206 // XXX - vbe_biosfn_set_mode(&AX,BX,ES,DI);
1207 // XXX - OR cirrus_vesa_02h
1211 handle_104f03(struct bregs *regs)
1213 // XXX - vbe_biosfn_return_current_mode
1214 // XXX - OR cirrus_vesa_03h
1218 handle_104f04(struct bregs *regs)
1220 // XXX - vbe_biosfn_save_restore_state(&AX, CX, DX, ES, &BX);
1224 handle_104f05(struct bregs *regs)
1226 // XXX - vbe_biosfn_display_window_control
1227 // XXX - OR cirrus_vesa_05h
1231 handle_104f06(struct bregs *regs)
1233 // XXX - vbe_biosfn_set_get_logical_scan_line_length
1234 // XXX - OR cirrus_vesa_06h
1238 handle_104f07(struct bregs *regs)
1240 // XXX - vbe_biosfn_set_get_display_start
1241 // XXX - OR cirrus_vesa_07h
1245 handle_104f08(struct bregs *regs)
1247 // XXX - vbe_biosfn_set_get_dac_palette_format
1251 handle_104f0a(struct bregs *regs)
1253 // XXX - vbe_biosfn_return_protected_mode_interface
1257 handle_104fXX(struct bregs *regs)
1264 handle_104f(struct bregs *regs)
1266 if (! CONFIG_VBE || !vbe_has_vbe_display()) {
1267 handle_104fXX(regs);
1272 case 0x00: handle_104f00(regs); break;
1273 case 0x01: handle_104f01(regs); break;
1274 case 0x02: handle_104f02(regs); break;
1275 case 0x03: handle_104f03(regs); break;
1276 case 0x04: handle_104f04(regs); break;
1277 case 0x05: handle_104f05(regs); break;
1278 case 0x06: handle_104f06(regs); break;
1279 case 0x07: handle_104f07(regs); break;
1280 case 0x08: handle_104f08(regs); break;
1281 case 0x0a: handle_104f0a(regs); break;
1282 default: handle_104fXX(regs); break;
1288 handle_10XX(struct bregs *regs)
1293 // INT 10h Video Support Service Entry Point
1295 handle_10(struct bregs *regs)
1297 debug_enter(regs, DEBUG_VGA_10);
1299 case 0x00: handle_1000(regs); break;
1300 case 0x01: handle_1001(regs); break;
1301 case 0x02: handle_1002(regs); break;
1302 case 0x03: handle_1003(regs); break;
1303 case 0x04: handle_1004(regs); break;
1304 case 0x05: handle_1005(regs); break;
1305 case 0x06: handle_1006(regs); break;
1306 case 0x07: handle_1007(regs); break;
1307 case 0x08: handle_1008(regs); break;
1308 case 0x09: handle_1009(regs); break;
1309 case 0x0a: handle_100a(regs); break;
1310 case 0x0b: handle_100b(regs); break;
1311 case 0x0c: handle_100c(regs); break;
1312 case 0x0d: handle_100d(regs); break;
1313 case 0x0e: handle_100e(regs); break;
1314 case 0x0f: handle_100f(regs); break;
1315 case 0x10: handle_1010(regs); break;
1316 case 0x11: handle_1011(regs); break;
1317 case 0x12: handle_1012(regs); break;
1318 case 0x13: handle_1013(regs); break;
1319 case 0x1a: handle_101a(regs); break;
1320 case 0x1b: handle_101b(regs); break;
1321 case 0x1c: handle_101c(regs); break;
1322 case 0x4f: handle_104f(regs); break;
1323 default: handle_10XX(regs); break;
1328 /****************************************************************
1330 ****************************************************************/
1333 init_bios_area(void)
1335 // init detected hardware BIOS Area
1336 // set 80x25 color (not clear from RBIL but usual)
1337 u16 eqf = GET_BDA(equipment_list_flags);
1338 SET_BDA(equipment_list_flags, (eqf & 0xffcf) | 0x20);
1340 // Just for the first int10 find its children
1342 // the default char height
1343 SET_BDA(char_height, 0x10);
1346 SET_BDA(video_ctl, 0x60);
1348 // Set the basic screen we have
1349 SET_BDA(video_switches, 0xf9);
1351 // Set the basic modeset options
1352 SET_BDA(modeset_ctl, 0x51);
1354 // Set the default MSR
1355 SET_BDA(video_msr, 0x09);
1359 vga_post(struct bregs *regs)
1361 debug_enter(regs, DEBUG_VGA_POST);
1370 extern void entry_10(void);
1371 SET_IVT(0x10, SEGOFF(get_global_seg(), (u32)entry_10));
1376 // XXX - clear screen and display info
1379 SET_VGA(video_save_pointer_table[0], (u32)video_param_table);
1380 SET_VGA(video_save_pointer_table[1], get_global_seg());
1383 extern u8 _rom_header_size, _rom_header_checksum;
1384 SET_VGA(_rom_header_checksum, 0);
1385 u8 sum = -checksum_far(get_global_seg(), 0, _rom_header_size * 512);
1386 SET_VGA(_rom_header_checksum, sum);