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 "vgabios.h" // find_vga_entry
18 #include "optionroms.h" // struct pci_data
19 #include "config.h" // CONFIG_*
20 #include "stdvga.h" // stdvga_set_mode
21 #include "geodevga.h" // geodevga_init
22 #include "bochsvga.h" // bochsvga_init
23 #include "clext.h" // clext_init
24 #include "vgahw.h" // vgahw_set_mode
27 #define DEBUG_VGA_POST 1
28 #define DEBUG_VGA_10 3
31 /****************************************************************
33 ****************************************************************/
34 #if CONFIG_VGA_PCI == 1
35 struct pci_data rom_pci_data VAR16VISIBLE = {
36 .signature = PCI_ROM_SIGNATURE,
37 .vendor = CONFIG_VGA_VID,
38 .device = CONFIG_VGA_DID,
42 .type = PCIROM_CODETYPE_X86,
47 /****************************************************************
49 ****************************************************************/
52 set_cursor_shape(u8 start, u8 end)
57 u16 curs = (start << 8) + end;
58 SET_BDA(cursor_type, curs);
60 u8 modeset_ctl = GET_BDA(modeset_ctl);
61 u16 cheight = GET_BDA(char_height);
62 if ((modeset_ctl & 0x01) && (cheight > 8) && (end < 8) && (start < 0x20)) {
63 if (end != (start + 1))
64 start = ((start + 1) * cheight / 8) - 1;
66 start = ((end + 1) * cheight / 8) - 2;
67 end = ((end + 1) * cheight / 8) - 1;
69 stdvga_set_cursor_shape(start, end);
73 get_cursor_shape(u8 page)
77 // FIXME should handle VGA 14/16 lines
78 return GET_BDA(cursor_type);
82 set_cursor_pos(struct cursorpos cp)
84 // Should not happen...
89 SET_BDA(cursor_pos[cp.page], (cp.y << 8) | cp.x);
91 // Set the hardware cursor
92 u8 current = GET_BDA(video_page);
93 if (cp.page != current)
97 u16 nbcols = GET_BDA(video_cols);
98 u16 nbrows = GET_BDA(video_rows) + 1;
100 // Calculate the address knowing nbcols nbrows and page num
101 u16 address = (SCREEN_IO_START(nbcols, nbrows, cp.page)
102 + cp.x + cp.y * nbcols);
104 stdvga_set_cursor_pos(address);
107 static struct cursorpos
108 get_cursor_pos(u8 page)
111 // special case - use current page
112 page = GET_BDA(video_page);
114 struct cursorpos cp = { 0, 0, 0xfe };
117 // FIXME should handle VGA 14/16 lines
118 u16 xy = GET_BDA(cursor_pos[page]);
119 struct cursorpos cp = {xy, xy>>8, page};
124 set_active_page(u8 page)
130 struct vgamode_s *vmode_g = find_vga_entry(GET_BDA(video_mode));
134 // Get pos curs pos for the right page
135 struct cursorpos cp = get_cursor_pos(page);
138 if (GET_GLOBAL(vmode_g->memmodel) == MM_TEXT) {
139 // Get the dimensions
140 u16 nbcols = GET_BDA(video_cols);
141 u16 nbrows = GET_BDA(video_rows) + 1;
143 // Calculate the address knowing nbcols nbrows and page num
144 address = SCREEN_MEM_START(nbcols, nbrows, page);
145 SET_BDA(video_pagestart, address);
148 address = SCREEN_IO_START(nbcols, nbrows, page);
150 address = page * GET_GLOBAL(vmode_g->slength);
153 stdvga_set_active_page(address);
155 // And change the BIOS page
156 SET_BDA(video_page, page);
158 dprintf(1, "Set active page %02x address %04x\n", page, address);
160 // Display the cursor, now the page is active
165 set_scan_lines(u8 lines)
167 stdvga_set_scan_lines(lines);
169 set_cursor_shape(0x06, 0x07);
171 set_cursor_shape(lines - 4, lines - 3);
172 SET_BDA(char_height, lines);
173 u16 vde = stdvga_get_vde();
174 u8 rows = vde / lines;
175 SET_BDA(video_rows, rows - 1);
176 u16 cols = GET_BDA(video_cols);
177 SET_BDA(video_pagesize, rows * cols * 2);
181 /****************************************************************
183 ****************************************************************/
185 // Scroll the screen one line. This function is designed to be called
186 // tail-recursive to reduce stack usage.
188 scroll_one(u16 nbrows, u16 nbcols, u8 page)
190 struct cursorpos ul = {0, 0, page};
191 struct cursorpos lr = {nbcols-1, nbrows-1, page};
192 vgafb_scroll(1, -1, ul, lr);
195 // Write a character to the screen at a given position. Implement
196 // special characters and scroll the screen if necessary.
198 write_teletype(struct cursorpos *pcp, struct carattr ca)
200 struct cursorpos cp = *pcp;
202 // Get the dimensions
203 u16 nbrows = GET_BDA(video_rows) + 1;
204 u16 nbcols = GET_BDA(video_cols);
222 struct carattr dummyca = {' ', ca.attr, ca.use_attr};
223 vgafb_write_char(cp, dummyca);
225 } while (cp.x < nbcols && cp.x % 8);
228 vgafb_write_char(cp, ca);
232 // Do we need to wrap ?
233 if (cp.x == nbcols) {
237 // Do we need to scroll ?
245 scroll_one(nbrows, nbcols, cp.page);
248 // Write out a buffer of alternating characters and attributes.
250 write_attr_string(struct cursorpos *pcp, u16 count, u16 seg, u8 *offset_far)
253 u8 car = GET_FARVAR(seg, *offset_far);
255 u8 attr = GET_FARVAR(seg, *offset_far);
258 struct carattr ca = {car, attr, 1};
259 write_teletype(pcp, ca);
263 // Write out a buffer of characters.
265 write_string(struct cursorpos *pcp, u8 attr, u16 count, u16 seg, u8 *offset_far)
268 u8 car = GET_FARVAR(seg, *offset_far);
271 struct carattr ca = {car, attr, 1};
272 write_teletype(pcp, ca);
277 /****************************************************************
278 * Save and restore bda state
279 ****************************************************************/
282 save_bda_state(u16 seg, struct saveBDAstate *info)
284 SET_FARVAR(seg, info->video_mode, GET_BDA(video_mode));
285 SET_FARVAR(seg, info->video_cols, GET_BDA(video_cols));
286 SET_FARVAR(seg, info->video_pagesize, GET_BDA(video_pagesize));
287 SET_FARVAR(seg, info->crtc_address, GET_BDA(crtc_address));
288 SET_FARVAR(seg, info->video_rows, GET_BDA(video_rows));
289 SET_FARVAR(seg, info->char_height, GET_BDA(char_height));
290 SET_FARVAR(seg, info->video_ctl, GET_BDA(video_ctl));
291 SET_FARVAR(seg, info->video_switches, GET_BDA(video_switches));
292 SET_FARVAR(seg, info->modeset_ctl, GET_BDA(modeset_ctl));
293 SET_FARVAR(seg, info->cursor_type, GET_BDA(cursor_type));
296 SET_FARVAR(seg, info->cursor_pos[i], GET_BDA(cursor_pos[i]));
297 SET_FARVAR(seg, info->video_pagestart, GET_BDA(video_pagestart));
298 SET_FARVAR(seg, info->video_page, GET_BDA(video_page));
300 SET_FARVAR(seg, info->font0, GET_IVT(0x1f));
301 SET_FARVAR(seg, info->font1, GET_IVT(0x43));
305 restore_bda_state(u16 seg, struct saveBDAstate *info)
307 SET_BDA(video_mode, GET_FARVAR(seg, info->video_mode));
308 SET_BDA(video_cols, GET_FARVAR(seg, info->video_cols));
309 SET_BDA(video_pagesize, GET_FARVAR(seg, info->video_pagesize));
310 SET_BDA(crtc_address, GET_FARVAR(seg, info->crtc_address));
311 SET_BDA(video_rows, GET_FARVAR(seg, info->video_rows));
312 SET_BDA(char_height, GET_FARVAR(seg, info->char_height));
313 SET_BDA(video_ctl, GET_FARVAR(seg, info->video_ctl));
314 SET_BDA(video_switches, GET_FARVAR(seg, info->video_switches));
315 SET_BDA(modeset_ctl, GET_FARVAR(seg, info->modeset_ctl));
316 SET_BDA(cursor_type, GET_FARVAR(seg, info->cursor_type));
318 for (i = 0; i < 8; i++)
319 SET_BDA(cursor_pos[i], GET_FARVAR(seg, info->cursor_pos[i]));
320 SET_BDA(video_pagestart, GET_FARVAR(seg, info->video_pagestart));
321 SET_BDA(video_page, GET_FARVAR(seg, info->video_page));
323 SET_IVT(0x1f, GET_FARVAR(seg, info->font0));
324 SET_IVT(0x43, GET_FARVAR(seg, info->font1));
327 // Setup BDA after a mode switch.
329 modeswitch_set_bda(int mode, int flags, struct vgamode_s *vmode_g)
332 int width = GET_GLOBAL(vmode_g->width);
333 int height = GET_GLOBAL(vmode_g->height);
334 int cheight = GET_GLOBAL(vmode_g->cheight);
335 SET_BDA(video_mode, mode);
336 if (GET_GLOBAL(vmode_g->memmodel) == MM_TEXT) {
337 SET_BDA(video_cols, width);
338 SET_BDA(video_rows, height-1);
339 SET_BDA(cursor_type, 0x0607);
341 int cwidth = GET_GLOBAL(vmode_g->cwidth);
342 SET_BDA(video_cols, width / cwidth);
343 SET_BDA(video_rows, (height / cheight) - 1);
344 SET_BDA(cursor_type, 0x0000);
346 SET_BDA(video_pagesize, GET_GLOBAL(vmode_g->slength));
347 SET_BDA(crtc_address, stdvga_get_crtc());
348 SET_BDA(char_height, cheight);
349 SET_BDA(video_ctl, 0x60 | (flags & MF_NOCLEARMEM ? 0x80 : 0x00));
350 SET_BDA(video_switches, 0xF9);
351 SET_BDA(modeset_ctl, GET_BDA(modeset_ctl) & 0x7f);
354 SET_BDA(cursor_pos[i], 0x0000);
355 SET_BDA(video_pagestart, 0x0000);
356 SET_BDA(video_page, 0x00);
358 // FIXME We nearly have the good tables. to be reworked
359 SET_BDA(dcc_index, 0x08); // 8 is VGA should be ok for now
360 SET_BDA(video_savetable
361 , SEGOFF(get_global_seg(), (u32)&video_save_pointer_table));
364 SET_BDA(video_msr, 0x00); // Unavailable on vanilla vga, but...
365 SET_BDA(video_pal, 0x00); // Unavailable on vanilla vga, but...
367 // Set the ints 0x1F and 0x43
368 SET_IVT(0x1f, SEGOFF(get_global_seg(), (u32)&vgafont8[128 * 8]));
372 SET_IVT(0x43, SEGOFF(get_global_seg(), (u32)vgafont8));
375 SET_IVT(0x43, SEGOFF(get_global_seg(), (u32)vgafont14));
378 SET_IVT(0x43, SEGOFF(get_global_seg(), (u32)vgafont16));
384 /****************************************************************
386 ****************************************************************/
389 handle_1000(struct bregs *regs)
391 int mode = regs->al & 0x7f;
401 int flags = GET_BDA(modeset_ctl) & (MF_NOPALETTE|MF_GRAYSUM);
403 flags |= MF_NOCLEARMEM;
405 vgahw_set_mode(mode, flags);
409 handle_1001(struct bregs *regs)
411 set_cursor_shape(regs->ch, regs->cl);
415 handle_1002(struct bregs *regs)
417 struct cursorpos cp = {regs->dl, regs->dh, regs->bh};
422 handle_1003(struct bregs *regs)
424 regs->cx = get_cursor_shape(regs->bh);
425 struct cursorpos cp = get_cursor_pos(regs->bh);
430 // Read light pen pos (unimplemented)
432 handle_1004(struct bregs *regs)
435 regs->ax = regs->bx = regs->cx = regs->dx = 0;
439 handle_1005(struct bregs *regs)
441 set_active_page(regs->al);
445 verify_scroll(struct bregs *regs, int dir)
447 u8 page = GET_BDA(video_page);
448 struct cursorpos ul = {regs->cl, regs->ch, page};
449 struct cursorpos lr = {regs->dl, regs->dh, page};
451 u16 nbrows = GET_BDA(video_rows) + 1;
454 u16 nbcols = GET_BDA(video_cols);
458 if (ul.x > lr.x || ul.y > lr.y)
461 u16 nblines = regs->al;
462 if (!nblines || nblines > lr.y - ul.y + 1)
463 nblines = lr.y - ul.y + 1;
465 vgafb_scroll(dir * nblines, regs->bh, ul, lr);
469 handle_1006(struct bregs *regs)
471 verify_scroll(regs, 1);
475 handle_1007(struct bregs *regs)
477 verify_scroll(regs, -1);
481 handle_1008(struct bregs *regs)
483 struct carattr ca = vgafb_read_char(get_cursor_pos(regs->bh));
489 write_chars(u8 page, struct carattr ca, u16 count)
491 struct cursorpos cp = get_cursor_pos(page);
493 vgafb_write_char(cp, ca);
499 handle_1009(struct bregs *regs)
501 struct carattr ca = {regs->al, regs->bl, 1};
502 write_chars(regs->bh, ca, regs->cx);
506 handle_100a(struct bregs *regs)
508 struct carattr ca = {regs->al, regs->bl, 0};
509 write_chars(regs->bh, ca, regs->cx);
514 handle_100b00(struct bregs *regs)
516 stdvga_set_border_color(regs->bl);
520 handle_100b01(struct bregs *regs)
522 stdvga_set_palette(regs->bl);
526 handle_100bXX(struct bregs *regs)
532 handle_100b(struct bregs *regs)
535 case 0x00: handle_100b00(regs); break;
536 case 0x01: handle_100b01(regs); break;
537 default: handle_100bXX(regs); break;
543 handle_100c(struct bregs *regs)
545 // XXX - page (regs->bh) is unused
546 vgafb_write_pixel(regs->al, regs->cx, regs->dx);
550 handle_100d(struct bregs *regs)
552 // XXX - page (regs->bh) is unused
553 regs->al = vgafb_read_pixel(regs->cx, regs->dx);
557 handle_100e(struct bregs *regs)
559 // Ralf Brown Interrupt list is WRONG on bh(page)
560 // We do output only on the current page !
561 struct carattr ca = {regs->al, regs->bl, 0};
562 struct cursorpos cp = get_cursor_pos(0xff);
563 write_teletype(&cp, ca);
568 handle_100f(struct bregs *regs)
570 regs->bh = GET_BDA(video_page);
571 regs->al = GET_BDA(video_mode) | (GET_BDA(video_ctl) & 0x80);
572 regs->ah = GET_BDA(video_cols);
577 handle_101000(struct bregs *regs)
581 stdvga_set_single_palette_reg(regs->bl, regs->bh);
585 handle_101001(struct bregs *regs)
587 stdvga_set_overscan_border_color(regs->bh);
591 handle_101002(struct bregs *regs)
593 stdvga_set_all_palette_reg(regs->es, (u8*)(regs->dx + 0));
597 handle_101003(struct bregs *regs)
599 stdvga_toggle_intensity(regs->bl);
603 handle_101007(struct bregs *regs)
607 regs->bh = stdvga_get_single_palette_reg(regs->bl);
611 handle_101008(struct bregs *regs)
613 regs->bh = stdvga_get_overscan_border_color();
617 handle_101009(struct bregs *regs)
619 stdvga_get_all_palette_reg(regs->es, (u8*)(regs->dx + 0));
623 handle_101010(struct bregs *regs)
625 u8 rgb[3] = {regs->dh, regs->ch, regs->cl};
626 stdvga_set_dac_regs(GET_SEG(SS), rgb, regs->bx, 1);
630 handle_101012(struct bregs *regs)
632 stdvga_set_dac_regs(regs->es, (u8*)(regs->dx + 0), regs->bx, regs->cx);
636 handle_101013(struct bregs *regs)
638 stdvga_select_video_dac_color_page(regs->bl, regs->bh);
642 handle_101015(struct bregs *regs)
645 stdvga_get_dac_regs(GET_SEG(SS), rgb, regs->bx, 1);
652 handle_101017(struct bregs *regs)
654 stdvga_get_dac_regs(regs->es, (u8*)(regs->dx + 0), regs->bx, regs->cx);
658 handle_101018(struct bregs *regs)
660 stdvga_set_pel_mask(regs->bl);
664 handle_101019(struct bregs *regs)
666 regs->bl = stdvga_get_pel_mask();
670 handle_10101a(struct bregs *regs)
672 stdvga_read_video_dac_state(®s->bl, ®s->bh);
676 handle_10101b(struct bregs *regs)
678 stdvga_perform_gray_scale_summing(regs->bx, regs->cx);
682 handle_1010XX(struct bregs *regs)
688 handle_1010(struct bregs *regs)
691 case 0x00: handle_101000(regs); break;
692 case 0x01: handle_101001(regs); break;
693 case 0x02: handle_101002(regs); break;
694 case 0x03: handle_101003(regs); break;
695 case 0x07: handle_101007(regs); break;
696 case 0x08: handle_101008(regs); break;
697 case 0x09: handle_101009(regs); break;
698 case 0x10: handle_101010(regs); break;
699 case 0x12: handle_101012(regs); break;
700 case 0x13: handle_101013(regs); break;
701 case 0x15: handle_101015(regs); break;
702 case 0x17: handle_101017(regs); break;
703 case 0x18: handle_101018(regs); break;
704 case 0x19: handle_101019(regs); break;
705 case 0x1a: handle_10101a(regs); break;
706 case 0x1b: handle_10101b(regs); break;
707 default: handle_1010XX(regs); break;
713 handle_101100(struct bregs *regs)
715 stdvga_load_font(regs->es, (void*)(regs->bp+0), regs->cx
716 , regs->dx, regs->bl, regs->bh);
720 handle_101101(struct bregs *regs)
722 stdvga_load_font(get_global_seg(), vgafont14, 0x100, 0, regs->bl, 14);
726 handle_101102(struct bregs *regs)
728 stdvga_load_font(get_global_seg(), vgafont8, 0x100, 0, regs->bl, 8);
732 handle_101103(struct bregs *regs)
734 stdvga_set_text_block_specifier(regs->bl);
738 handle_101104(struct bregs *regs)
740 stdvga_load_font(get_global_seg(), vgafont16, 0x100, 0, regs->bl, 16);
744 handle_101110(struct bregs *regs)
746 stdvga_load_font(regs->es, (void*)(regs->bp+0), regs->cx
747 , regs->dx, regs->bl, regs->bh);
748 set_scan_lines(regs->bh);
752 handle_101111(struct bregs *regs)
754 stdvga_load_font(get_global_seg(), vgafont14, 0x100, 0, regs->bl, 14);
759 handle_101112(struct bregs *regs)
761 stdvga_load_font(get_global_seg(), vgafont8, 0x100, 0, regs->bl, 8);
766 handle_101114(struct bregs *regs)
768 stdvga_load_font(get_global_seg(), vgafont16, 0x100, 0, regs->bl, 16);
773 handle_101130(struct bregs *regs)
777 struct segoff_s so = GET_IVT(0x1f);
779 regs->bp = so.offset;
783 struct segoff_s so = GET_IVT(0x43);
785 regs->bp = so.offset;
789 regs->es = get_global_seg();
790 regs->bp = (u32)vgafont14;
793 regs->es = get_global_seg();
794 regs->bp = (u32)vgafont8;
797 regs->es = get_global_seg();
798 regs->bp = (u32)vgafont8 + 128 * 8;
801 regs->es = get_global_seg();
802 regs->bp = (u32)vgafont14alt;
805 regs->es = get_global_seg();
806 regs->bp = (u32)vgafont16;
809 regs->es = get_global_seg();
810 regs->bp = (u32)vgafont16alt;
813 dprintf(1, "Get font info BH(%02x) was discarded\n", regs->bh);
816 // Set byte/char of on screen font
817 regs->cx = GET_BDA(char_height) & 0xff;
819 // Set Highest char row
820 regs->dx = GET_BDA(video_rows);
824 handle_1011XX(struct bregs *regs)
830 handle_1011(struct bregs *regs)
833 case 0x00: handle_101100(regs); break;
834 case 0x01: handle_101101(regs); break;
835 case 0x02: handle_101102(regs); break;
836 case 0x03: handle_101103(regs); break;
837 case 0x04: handle_101104(regs); break;
838 case 0x10: handle_101110(regs); break;
839 case 0x11: handle_101111(regs); break;
840 case 0x12: handle_101112(regs); break;
841 case 0x14: handle_101114(regs); break;
842 case 0x30: handle_101130(regs); break;
843 default: handle_1011XX(regs); break;
849 handle_101210(struct bregs *regs)
851 u16 crtc_addr = GET_BDA(crtc_address);
852 if (crtc_addr == VGAREG_MDA_CRTC_ADDRESS)
856 regs->cx = GET_BDA(video_switches) & 0x0f;
860 handle_101230(struct bregs *regs)
862 u8 mctl = GET_BDA(modeset_ctl);
863 u8 vswt = GET_BDA(video_switches);
867 mctl = (mctl & ~0x10) | 0x80;
868 vswt = (vswt & ~0x0f) | 0x08;
873 vswt = (vswt & ~0x0f) | 0x09;
877 mctl = (mctl & ~0x80) | 0x10;
878 vswt = (vswt & ~0x0f) | 0x09;
881 dprintf(1, "Select vert res (%02x) was discarded\n", regs->al);
884 SET_BDA(modeset_ctl, mctl);
885 SET_BDA(video_switches, vswt);
890 handle_101231(struct bregs *regs)
892 u8 v = (regs->al & 0x01) << 3;
893 u8 mctl = GET_BDA(video_ctl) & ~0x08;
894 SET_BDA(video_ctl, mctl | v);
899 handle_101232(struct bregs *regs)
901 stdvga_enable_video_addressing(regs->al);
906 handle_101233(struct bregs *regs)
908 u8 v = ((regs->al << 1) & 0x02) ^ 0x02;
909 u8 v2 = GET_BDA(modeset_ctl) & ~0x02;
910 SET_BDA(modeset_ctl, v | v2);
915 handle_101234(struct bregs *regs)
917 u8 v = (regs->al & 0x01) ^ 0x01;
918 u8 v2 = GET_BDA(modeset_ctl) & ~0x01;
919 SET_BDA(modeset_ctl, v | v2);
924 handle_101235(struct bregs *regs)
931 handle_101236(struct bregs *regs)
938 handle_1012XX(struct bregs *regs)
944 handle_1012(struct bregs *regs)
947 case 0x10: handle_101210(regs); break;
948 case 0x30: handle_101230(regs); break;
949 case 0x31: handle_101231(regs); break;
950 case 0x32: handle_101232(regs); break;
951 case 0x33: handle_101233(regs); break;
952 case 0x34: handle_101234(regs); break;
953 case 0x35: handle_101235(regs); break;
954 case 0x36: handle_101236(regs); break;
955 default: handle_1012XX(regs); break;
958 // XXX - cirrus has 1280, 1281, 1282, 1285, 129a, 12a0, 12a1, 12a2, 12ae
964 handle_1013(struct bregs *regs)
966 struct cursorpos cp = {regs->dl, regs->dh, regs->bh};
967 // if row=0xff special case : use current cursor position
969 cp = get_cursor_pos(cp.page);
972 write_attr_string(&cp, regs->cx, regs->es, (void*)(regs->bp + 0));
974 write_string(&cp, regs->bl, regs->cx, regs->es, (void*)(regs->bp + 0));
982 handle_101a00(struct bregs *regs)
984 regs->bx = GET_BDA(dcc_index);
989 handle_101a01(struct bregs *regs)
991 SET_BDA(dcc_index, regs->bl);
992 dprintf(1, "Alternate Display code (%02x) was discarded\n", regs->bh);
997 handle_101aXX(struct bregs *regs)
1003 handle_101a(struct bregs *regs)
1006 case 0x00: handle_101a00(regs); break;
1007 case 0x01: handle_101a01(regs); break;
1008 default: handle_101aXX(regs); break;
1014 struct segoff_s static_functionality;
1034 handle_101b(struct bregs *regs)
1037 struct funcInfo *info = (void*)(regs->di+0);
1038 memset_far(seg, info, 0, sizeof(*info));
1039 // Address of static functionality table
1040 SET_FARVAR(seg, info->static_functionality
1041 , SEGOFF(get_global_seg(), (u32)static_functionality));
1043 // Hard coded copy from BIOS area. Should it be cleaner ?
1044 memcpy_far(seg, info->bda_0x49, SEG_BDA, (void*)0x49
1045 , sizeof(info->bda_0x49));
1046 memcpy_far(seg, info->bda_0x84, SEG_BDA, (void*)0x84
1047 , sizeof(info->bda_0x84));
1049 SET_FARVAR(seg, info->dcc_index, GET_BDA(dcc_index));
1050 SET_FARVAR(seg, info->colors, 16);
1051 SET_FARVAR(seg, info->pages, 8);
1052 SET_FARVAR(seg, info->scan_lines, 2);
1053 SET_FARVAR(seg, info->video_mem, 3);
1059 handle_101c00(struct bregs *regs)
1061 u16 flags = regs->cx;
1064 size += sizeof(struct saveVideoHardware);
1066 size += sizeof(struct saveBDAstate);
1068 size += sizeof(struct saveDACcolors);
1074 handle_101c01(struct bregs *regs)
1076 u16 flags = regs->cx;
1078 void *data = (void*)(regs->bx+0);
1080 stdvga_save_state(seg, data);
1081 data += sizeof(struct saveVideoHardware);
1084 save_bda_state(seg, data);
1085 data += sizeof(struct saveBDAstate);
1088 stdvga_save_dac_state(seg, data);
1093 handle_101c02(struct bregs *regs)
1095 u16 flags = regs->cx;
1097 void *data = (void*)(regs->bx+0);
1099 stdvga_restore_state(seg, data);
1100 data += sizeof(struct saveVideoHardware);
1103 restore_bda_state(seg, data);
1104 data += sizeof(struct saveBDAstate);
1107 stdvga_restore_dac_state(seg, data);
1112 handle_101cXX(struct bregs *regs)
1118 handle_101c(struct bregs *regs)
1121 case 0x00: handle_101c00(regs); break;
1122 case 0x01: handle_101c01(regs); break;
1123 case 0x02: handle_101c02(regs); break;
1124 default: handle_101cXX(regs); break;
1129 handle_10XX(struct bregs *regs)
1134 // INT 10h Video Support Service Entry Point
1136 handle_10(struct bregs *regs)
1138 debug_enter(regs, DEBUG_VGA_10);
1140 case 0x00: handle_1000(regs); break;
1141 case 0x01: handle_1001(regs); break;
1142 case 0x02: handle_1002(regs); break;
1143 case 0x03: handle_1003(regs); break;
1144 case 0x04: handle_1004(regs); break;
1145 case 0x05: handle_1005(regs); break;
1146 case 0x06: handle_1006(regs); break;
1147 case 0x07: handle_1007(regs); break;
1148 case 0x08: handle_1008(regs); break;
1149 case 0x09: handle_1009(regs); break;
1150 case 0x0a: handle_100a(regs); break;
1151 case 0x0b: handle_100b(regs); break;
1152 case 0x0c: handle_100c(regs); break;
1153 case 0x0d: handle_100d(regs); break;
1154 case 0x0e: handle_100e(regs); break;
1155 case 0x0f: handle_100f(regs); break;
1156 case 0x10: handle_1010(regs); break;
1157 case 0x11: handle_1011(regs); break;
1158 case 0x12: handle_1012(regs); break;
1159 case 0x13: handle_1013(regs); break;
1160 case 0x1a: handle_101a(regs); break;
1161 case 0x1b: handle_101b(regs); break;
1162 case 0x1c: handle_101c(regs); break;
1163 case 0x4f: handle_104f(regs); break;
1164 default: handle_10XX(regs); break;
1169 /****************************************************************
1171 ****************************************************************/
1174 init_bios_area(void)
1176 // init detected hardware BIOS Area
1177 // set 80x25 color (not clear from RBIL but usual)
1178 u16 eqf = GET_BDA(equipment_list_flags);
1179 SET_BDA(equipment_list_flags, (eqf & 0xffcf) | 0x20);
1181 // Just for the first int10 find its children
1183 // the default char height
1184 SET_BDA(char_height, 0x10);
1187 SET_BDA(video_ctl, 0x60);
1189 // Set the basic screen we have
1190 SET_BDA(video_switches, 0xf9);
1192 // Set the basic modeset options
1193 SET_BDA(modeset_ctl, 0x51);
1195 // Set the default MSR
1196 SET_BDA(video_msr, 0x09);
1202 vga_post(struct bregs *regs)
1204 debug_enter(regs, DEBUG_VGA_POST);
1206 SET_VGA(VgaBDF, regs->ax);
1208 int ret = vgahw_init();
1210 dprintf(1, "Failed to initialize VGA hardware. Exiting.\n");
1216 build_video_param();
1218 extern void entry_10(void);
1219 SET_IVT(0x10, SEGOFF(get_global_seg(), (u32)entry_10));
1221 // XXX - clear screen and display info
1224 extern u8 _rom_header_size, _rom_header_checksum;
1225 SET_VGA(_rom_header_checksum, 0);
1226 u8 sum = -checksum_far(get_global_seg(), 0, _rom_header_size * 512);
1227 SET_VGA(_rom_header_checksum, sum);