1 // Video Bios Extensions handlers
3 // Copyright (C) 2012 Kevin O'Connor <kevin@koconnor.net>
4 // Copyright (C) 2011 Julian Pidancet <julian.pidancet@citrix.com>
5 // Copyright (C) 2001-2008 the LGPL VGABios developers Team
7 // This file may be distributed under the terms of the GNU LGPLv3 license.
9 #include "vgabios.h" // handle_104f
10 #include "config.h" // CONFIG_*
11 #include "bregs.h" // struct bregs
12 #include "vbe.h" // struct vbe_info
13 #include "util.h" // dprintf
14 #include "biosvar.h" // get_global_set
15 #include "vgahw.h" // vgahw_set_mode
17 u32 VBE_total_memory VAR16 = 256 * 1024;
18 u32 VBE_capabilities VAR16;
19 u32 VBE_framebuffer VAR16;
20 u16 VBE_win_granularity VAR16 = 64;
23 vbe_104f00(struct bregs *regs)
26 struct vbe_info *info = (void*)(regs->di+0);
28 if (GET_FARVAR(seg, info->signature) == VBE2_SIGNATURE) {
29 dprintf(4, "Get VBE Controller: VBE2 Signature found\n");
30 } else if (GET_FARVAR(seg, info->signature) == VESA_SIGNATURE) {
31 dprintf(4, "Get VBE Controller: VESA Signature found\n");
33 dprintf(4, "Get VBE Controller: Invalid Signature\n");
36 memset_far(seg, info, 0, sizeof(*info));
38 SET_FARVAR(seg, info->signature, VESA_SIGNATURE);
40 SET_FARVAR(seg, info->version, 0x0200);
42 SET_FARVAR(seg, info->oem_string,
43 SEGOFF(get_global_seg(), (u32)VBE_OEM_STRING));
44 SET_FARVAR(seg, info->capabilities, GET_GLOBAL(VBE_capabilities));
46 /* We generate our mode list in the reserved field of the info block */
47 u16 *destmode = (void*)info->reserved;
48 SET_FARVAR(seg, info->video_mode, SEGOFF(seg, (u32)destmode));
50 /* Total memory (in 64 blocks) */
51 SET_FARVAR(seg, info->total_memory
52 , GET_GLOBAL(VBE_total_memory) / (64*1024));
54 SET_FARVAR(seg, info->oem_vendor_string,
55 SEGOFF(get_global_seg(), (u32)VBE_VENDOR_STRING));
56 SET_FARVAR(seg, info->oem_product_string,
57 SEGOFF(get_global_seg(), (u32)VBE_PRODUCT_STRING));
58 SET_FARVAR(seg, info->oem_revision_string,
59 SEGOFF(get_global_seg(), (u32)VBE_REVISION_STRING));
61 /* Fill list of modes */
62 u16 *last = (void*)&info->reserved[sizeof(info->reserved)];
63 vgahw_list_modes(seg, destmode, last - 1);
69 vbe_104f01(struct bregs *regs)
72 struct vbe_mode_info *info = (void*)(regs->di+0);
75 dprintf(1, "VBE mode info request: %x\n", mode);
77 struct vgamode_s *vmode_g = vgahw_find_mode(mode);
79 dprintf(1, "VBE mode %x not found\n", mode);
84 memset_far(seg, info, 0, sizeof(*info));
85 u16 mode_attr = VBE_MODE_ATTRIBUTE_SUPPORTED |
86 VBE_MODE_ATTRIBUTE_EXTENDED_INFORMATION_AVAILABLE |
87 VBE_MODE_ATTRIBUTE_COLOR_MODE |
88 VBE_MODE_ATTRIBUTE_GRAPHICS_MODE |
89 VBE_MODE_ATTRIBUTE_NOT_VGA_COMPATIBLE;
90 u32 framebuffer = GET_GLOBAL(VBE_framebuffer);
91 int depth = GET_GLOBAL(vmode_g->depth);
93 mode_attr |= VBE_MODE_ATTRIBUTE_TTY_BIOS_SUPPORT;
95 mode_attr |= VBE_MODE_ATTRIBUTE_LINEAR_FRAME_BUFFER_MODE;
96 SET_FARVAR(seg, info->mode_attributes, mode_attr);
97 SET_FARVAR(seg, info->winA_attributes,
98 VBE_WINDOW_ATTRIBUTE_RELOCATABLE |
99 VBE_WINDOW_ATTRIBUTE_READABLE |
100 VBE_WINDOW_ATTRIBUTE_WRITEABLE);
101 SET_FARVAR(seg, info->winB_attributes, 0);
102 SET_FARVAR(seg, info->win_granularity, GET_GLOBAL(VBE_win_granularity));
103 SET_FARVAR(seg, info->win_size, 64); /* Bank size 64K */
104 SET_FARVAR(seg, info->winA_seg, GET_GLOBAL(vmode_g->sstart));
105 SET_FARVAR(seg, info->winB_seg, 0x0);
106 extern void entry_104f05(void);
107 SET_FARVAR(seg, info->win_func_ptr
108 , SEGOFF(get_global_seg(), (u32)entry_104f05));
109 int width = GET_GLOBAL(vmode_g->width);
110 int height = GET_GLOBAL(vmode_g->height);
111 int linesize = DIV_ROUND_UP(width * vga_bpp(vmode_g), 8);
112 SET_FARVAR(seg, info->bytes_per_scanline, linesize);
113 SET_FARVAR(seg, info->xres, width);
114 SET_FARVAR(seg, info->yres, height);
115 SET_FARVAR(seg, info->xcharsize, GET_GLOBAL(vmode_g->cwidth));
116 SET_FARVAR(seg, info->ycharsize, GET_GLOBAL(vmode_g->cheight));
117 int planes = (depth == 4) ? 4 : 1;
118 SET_FARVAR(seg, info->planes, planes);
119 SET_FARVAR(seg, info->bits_per_pixel, depth);
120 SET_FARVAR(seg, info->banks, 1);
121 SET_FARVAR(seg, info->mem_model, GET_GLOBAL(vmode_g->memmodel));
122 SET_FARVAR(seg, info->bank_size, 0);
123 u32 pages = GET_GLOBAL(VBE_total_memory) / (height * linesize);
124 SET_FARVAR(seg, info->pages, (pages / planes) - 1);
125 SET_FARVAR(seg, info->reserved0, 1);
127 u8 r_size, r_pos, g_size, g_pos, b_size, b_pos, a_size, a_pos;
130 case 15: r_size = 5; r_pos = 10; g_size = 5; g_pos = 5;
131 b_size = 5; b_pos = 0; a_size = 1; a_pos = 15; break;
132 case 16: r_size = 5; r_pos = 11; g_size = 6; g_pos = 5;
133 b_size = 5; b_pos = 0; a_size = 0; a_pos = 0; break;
134 case 24: r_size = 8; r_pos = 16; g_size = 8; g_pos = 8;
135 b_size = 8; b_pos = 0; a_size = 0; a_pos = 0; break;
136 case 32: r_size = 8; r_pos = 16; g_size = 8; g_pos = 8;
137 b_size = 8; b_pos = 0; a_size = 8; a_pos = 24; break;
138 default: r_size = 0; r_pos = 0; g_size = 0; g_pos = 0;
139 b_size = 0; b_pos = 0; a_size = 0; a_pos = 0; break;
142 SET_FARVAR(seg, info->red_size, r_size);
143 SET_FARVAR(seg, info->red_pos, r_pos);
144 SET_FARVAR(seg, info->green_size, g_size);
145 SET_FARVAR(seg, info->green_pos, g_pos);
146 SET_FARVAR(seg, info->blue_size, b_size);
147 SET_FARVAR(seg, info->blue_pos, b_pos);
148 SET_FARVAR(seg, info->alpha_size, a_size);
149 SET_FARVAR(seg, info->alpha_pos, a_pos);
152 SET_FARVAR(seg, info->directcolor_info,
153 VBE_DIRECTCOLOR_RESERVED_BITS_AVAILABLE);
155 SET_FARVAR(seg, info->directcolor_info, 0);
158 SET_FARVAR(seg, info->phys_base, GET_GLOBAL(VBE_framebuffer));
160 SET_FARVAR(seg, info->phys_base, 0);
162 SET_FARVAR(seg, info->reserved1, 0);
163 SET_FARVAR(seg, info->reserved2, 0);
164 SET_FARVAR(seg, info->linear_bytes_per_scanline, linesize);
165 SET_FARVAR(seg, info->bank_pages, 0);
166 SET_FARVAR(seg, info->linear_pages, 0);
167 SET_FARVAR(seg, info->linear_red_size, r_size);
168 SET_FARVAR(seg, info->linear_red_pos, r_pos);
169 SET_FARVAR(seg, info->linear_green_size, g_size);
170 SET_FARVAR(seg, info->linear_green_pos, g_pos);
171 SET_FARVAR(seg, info->linear_blue_size, b_size);
172 SET_FARVAR(seg, info->linear_blue_pos, b_pos);
173 SET_FARVAR(seg, info->linear_alpha_size, a_size);
174 SET_FARVAR(seg, info->linear_alpha_pos, a_pos);
175 SET_FARVAR(seg, info->pixclock_max, 0);
181 vbe_104f02(struct bregs *regs)
183 dprintf(1, "VBE mode set: %x\n", regs->bx);
185 int mode = regs->bx & ~MF_VBEFLAGS;
186 int flags = regs->bx & MF_VBEFLAGS;
187 int ret = vga_set_mode(mode, flags);
194 vbe_104f03(struct bregs *regs)
196 regs->bx = GET_BDA(vbe_mode);
197 dprintf(1, "VBE current mode=%x\n", regs->bx);
202 vbe_104f04(struct bregs *regs)
209 vbe_104f05(struct bregs *regs)
211 if (regs->bh > 1 || regs->bl > 1)
213 if (GET_BDA(vbe_mode) & MF_LINEARFB) {
214 regs->ah = VBE_RETURN_STATUS_INVALID;
217 struct vgamode_s *vmode_g = get_current_mode();
221 int ret = vgahw_get_window(vmode_g, regs->bl);
228 int ret = vgahw_set_window(vmode_g, regs->bl, regs->dx);
238 vbe_104f06(struct bregs *regs)
242 struct vgamode_s *vmode_g = get_current_mode();
245 int bpp = vga_bpp(vmode_g);
247 if (regs->bl == 0x00) {
248 int ret = vgahw_set_linelength(vmode_g, DIV_ROUND_UP(regs->cx * bpp, 8));
251 } else if (regs->bl == 0x02) {
252 int ret = vgahw_set_linelength(vmode_g, regs->cx);
256 int linelength = vgahw_get_linelength(vmode_g);
260 regs->bx = linelength;
261 regs->cx = (linelength * 8) / bpp;
262 regs->dx = GET_GLOBAL(VBE_total_memory) / linelength;
270 vbe_104f07(struct bregs *regs)
272 struct vgamode_s *vmode_g = get_current_mode();
275 int bpp = vga_bpp(vmode_g);
276 int linelength = vgahw_get_linelength(vmode_g);
284 ret = vgahw_set_displaystart(
285 vmode_g, DIV_ROUND_UP(regs->cx * bpp, 8) + linelength * regs->dx);
290 ret = vgahw_get_displaystart(vmode_g);
293 regs->dx = ret / linelength;
294 regs->cx = (ret % linelength) * 8 / bpp;
306 vbe_104f08(struct bregs *regs)
313 vbe_104f0a(struct bregs *regs)
320 vbe_104f10(struct bregs *regs)
327 SET_BDA(vbe_flag, regs->bh);
330 regs->bh = GET_BDA(vbe_flag);
340 vbe_104fXX(struct bregs *regs)
347 handle_104f(struct bregs *regs)
349 if (!CONFIG_VGA_VBE) {
355 case 0x00: vbe_104f00(regs); break;
356 case 0x01: vbe_104f01(regs); break;
357 case 0x02: vbe_104f02(regs); break;
358 case 0x03: vbe_104f03(regs); break;
359 case 0x04: vbe_104f04(regs); break;
360 case 0x05: vbe_104f05(regs); break;
361 case 0x06: vbe_104f06(regs); break;
362 case 0x07: vbe_104f07(regs); break;
363 case 0x08: vbe_104f08(regs); break;
364 case 0x0a: vbe_104f0a(regs); break;
365 case 0x10: vbe_104f10(regs); break;
366 default: vbe_104fXX(regs); break;