1 // Option rom scanning code.
3 // Copyright (C) 2009-2010 coresystems GmbH
4 // Copyright (C) 2010 Kevin O'Connor <kevin@koconnor.net>
6 // This file may be distributed under the terms of the GNU LGPLv3 license.
8 #include "bregs.h" // struct bregs
9 #include "farptr.h" // FLATPTR_TO_SEG
10 #include "config.h" // CONFIG_*
11 #include "util.h" // dprintf
12 #include "jpeg.h" // splash
13 #include "biosvar.h" // SET_EBDA
14 #include "paravirt.h" // romfile_find
17 /****************************************************************
19 ****************************************************************/
24 struct segoff_s oem_string_ptr;
26 struct segoff_s video_mode_ptr;
29 struct segoff_s oem_vendor_name_ptr;
30 struct segoff_s oem_product_name_ptr;
31 struct segoff_s oem_product_rev_ptr;
36 #define VESA_SIGNATURE 0x41534556 // VESA
37 #define VBE2_SIGNATURE 0x32454256 // VBE2
39 struct vesa_mode_info {
48 u16 bytes_per_scanline;
58 u8 number_of_image_pages;
66 u8 reserved_mask_size;
68 u8 direct_color_mode_info;
70 u32 offscreen_mem_offset;
71 u16 offscreen_mem_size;
76 /****************************************************************
78 ****************************************************************/
80 // Call int10 vga handler.
82 call16_int10(struct bregs *br)
91 /****************************************************************
92 * VGA text / graphics console
93 ****************************************************************/
96 enable_vga_text_console(void)
98 dprintf(1, "Turning on vga text mode console\n");
101 /* Enable VGA text mode */
102 memset(&br, 0, sizeof(br));
107 printf("SeaBIOS (version %s)\n\n", VERSION);
111 find_videomode(struct vesa_info *vesa_info, struct vesa_mode_info *mode_info
112 , int width, int height)
114 dprintf(3, "Finding vesa mode with dimensions %d/%d\n", width, height);
115 u16 *videomodes = SEGOFF_TO_FLATPTR(vesa_info->video_mode_ptr);
116 for (;; videomodes++) {
117 u16 videomode = *videomodes;
118 if (videomode == 0xffff) {
119 dprintf(1, "Unable to find vesa video mode dimensions %d/%d\n"
124 memset(&br, 0, sizeof(br));
126 br.cx = (1 << 14) | videomode;
127 br.di = FLATPTR_TO_OFFSET(mode_info);
128 br.es = FLATPTR_TO_SEG(mode_info);
131 dprintf(1, "get_mode failed.\n");
134 if (mode_info->x_resolution != width
135 || mode_info->y_resolution != height)
137 u8 depth = mode_info->bits_per_pixel;
138 if (depth != 16 && depth != 24 && depth != 32)
145 enable_vga_console(void)
147 struct vesa_info *vesa_info = NULL;
148 struct vesa_mode_info *mode_info = NULL;
149 struct jpeg_decdata *jpeg = NULL;
150 u8 *filedata = NULL, *picture = NULL;
152 if (!CONFIG_BOOTSPLASH)
154 dprintf(3, "Checking for bootsplash\n");
155 u32 file = romfile_find("bootsplash.jpg");
158 int filesize = romfile_size(file);
160 filedata = malloc_tmphigh(filesize);
161 vesa_info = malloc_tmplow(sizeof(*vesa_info));
162 mode_info = malloc_tmplow(sizeof(*mode_info));
164 if (!filedata || !jpeg || !vesa_info || !mode_info) {
169 /* Check whether we have a VESA 2.0 compliant BIOS */
170 memset(vesa_info, 0, sizeof(struct vesa_info));
171 vesa_info->vesa_signature = VBE2_SIGNATURE;
173 memset(&br, 0, sizeof(br));
175 br.di = FLATPTR_TO_OFFSET(vesa_info);
176 br.es = FLATPTR_TO_SEG(vesa_info);
178 if (vesa_info->vesa_signature != VESA_SIGNATURE) {
179 dprintf(1,"No VBE2 found.\n");
183 /* Print some debugging information about our card. */
184 char *vendor = SEGOFF_TO_FLATPTR(vesa_info->oem_vendor_name_ptr);
185 char *product = SEGOFF_TO_FLATPTR(vesa_info->oem_product_name_ptr);
186 dprintf(3, "VESA %d.%d\nVENDOR: %s\nPRODUCT: %s\n",
187 vesa_info->vesa_version>>8, vesa_info->vesa_version&0xff,
190 // Parse jpeg and get image size.
191 dprintf(5, "Copying bootsplash.jpg\n");
192 romfile_copy(file, filedata, filesize);
193 dprintf(5, "Decoding bootsplash.jpg\n");
194 int ret = jpeg_decode(jpeg, filedata);
196 dprintf(1, "jpeg_decode failed with return code %d...\n", ret);
200 jpeg_get_size(jpeg, &width, &height);
202 // Try to find a graphics mode with the corresponding dimensions.
203 int videomode = find_videomode(vesa_info, mode_info, width, height);
206 void *framebuffer = mode_info->phys_base_ptr;
207 int depth = mode_info->bits_per_pixel;
208 dprintf(3, "mode: %04x\n", videomode);
209 dprintf(3, "framebuffer: %p\n", framebuffer);
210 dprintf(3, "bytes per scanline: %d\n", mode_info->bytes_per_scanline);
211 dprintf(3, "bits per pixel: %d\n", depth);
213 // Allocate space for image and decompress it.
214 int imagesize = width * height * (depth / 8);
215 picture = malloc_tmphigh(imagesize);
220 dprintf(5, "Decompressing bootsplash.jpg\n");
221 ret = jpeg_show(jpeg, picture, width, height, depth);
223 dprintf(1, "jpeg_show failed with return code %d...\n", ret);
227 /* Switch to graphics mode */
228 dprintf(5, "Switching to graphics mode\n");
229 memset(&br, 0, sizeof(br));
231 br.bx = (1 << 14) | videomode;
234 dprintf(1, "set_mode failed.\n");
238 /* Show the picture */
239 dprintf(5, "Showing bootsplash.jpg\n");
240 iomemcpy(framebuffer, picture, imagesize);
241 dprintf(5, "Bootsplash copy complete\n");
242 SET_EBDA(bootsplash_active, 1);
252 enable_vga_text_console();
257 disable_bootsplash(void)
259 if (!CONFIG_BOOTSPLASH || !GET_EBDA(bootsplash_active))
261 SET_EBDA(bootsplash_active, 0);
262 enable_vga_text_console();