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_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, int bpp_req)
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;
139 if (depth != 16 && depth != 24 && depth != 32)
142 if (depth != bpp_req)
149 static int BootsplashActive;
152 enable_bootsplash(void)
154 if (!CONFIG_BOOTSPLASH)
156 /* splash picture can be bmp or jpeg file */
157 dprintf(3, "Checking for bootsplash\n");
158 u8 type = 0; /* 0 means jpg, 1 means bmp, default is 0=jpg */
160 u8 *filedata = romfile_loadfile("bootsplash.jpg", &filesize);
162 filedata = romfile_loadfile("bootsplash.bmp", &filesize);
167 dprintf(3, "start showing bootsplash\n");
169 u8 *picture = NULL; /* data buff used to be flushed to the video buf */
170 struct jpeg_decdata *jpeg = NULL;
171 struct bmp_decdata *bmp = NULL;
172 struct vesa_info *vesa_info = malloc_tmplow(sizeof(*vesa_info));
173 struct vesa_mode_info *mode_info = malloc_tmplow(sizeof(*mode_info));
174 if (!vesa_info || !mode_info) {
179 /* Check whether we have a VESA 2.0 compliant BIOS */
180 memset(vesa_info, 0, sizeof(struct vesa_info));
181 vesa_info->vesa_signature = VBE2_SIGNATURE;
183 memset(&br, 0, sizeof(br));
185 br.di = FLATPTR_TO_OFFSET(vesa_info);
186 br.es = FLATPTR_TO_SEG(vesa_info);
188 if (vesa_info->vesa_signature != VESA_SIGNATURE) {
189 dprintf(1,"No VBE2 found.\n");
193 /* Print some debugging information about our card. */
194 char *vendor = SEGOFF_TO_FLATPTR(vesa_info->oem_vendor_name_ptr);
195 char *product = SEGOFF_TO_FLATPTR(vesa_info->oem_product_name_ptr);
196 dprintf(3, "VESA %d.%d\nVENDOR: %s\nPRODUCT: %s\n",
197 vesa_info->vesa_version>>8, vesa_info->vesa_version&0xff,
200 int ret, width, height;
208 /* Parse jpeg and get image size. */
209 dprintf(5, "Decoding bootsplash.jpg\n");
210 ret = jpeg_decode(jpeg, filedata);
212 dprintf(1, "jpeg_decode failed with return code %d...\n", ret);
215 jpeg_get_size(jpeg, &width, &height);
222 /* Parse bmp and get image size. */
223 dprintf(5, "Decoding bootsplash.bmp\n");
224 ret = bmp_decode(bmp, filedata, filesize);
226 dprintf(1, "bmp_decode failed with return code %d...\n", ret);
229 bmp_get_size(bmp, &width, &height);
232 /* jpeg would use 16 or 24 bpp video mode, BMP use 24bpp mode only */
234 // Try to find a graphics mode with the corresponding dimensions.
235 int videomode = find_videomode(vesa_info, mode_info, width, height,
238 dprintf(1, "failed to find a videomode with %dx%d %dbpp (0=any).\n",
239 width, height, bpp_require);
242 void *framebuffer = mode_info->phys_base_ptr;
243 int depth = mode_info->bits_per_pixel;
244 dprintf(3, "mode: %04x\n", videomode);
245 dprintf(3, "framebuffer: %p\n", framebuffer);
246 dprintf(3, "bytes per scanline: %d\n", mode_info->bytes_per_scanline);
247 dprintf(3, "bits per pixel: %d\n", depth);
249 // Allocate space for image and decompress it.
250 int imagesize = height * mode_info->bytes_per_scanline;
251 picture = malloc_tmphigh(imagesize);
258 dprintf(5, "Decompressing bootsplash.jpg\n");
259 ret = jpeg_show(jpeg, picture, width, height, depth,
260 mode_info->bytes_per_scanline);
262 dprintf(1, "jpeg_show failed with return code %d...\n", ret);
266 dprintf(5, "Decompressing bootsplash.bmp\n");
267 ret = bmp_show(bmp, picture, width, height, depth,
268 mode_info->bytes_per_scanline);
270 dprintf(1, "bmp_show failed with return code %d...\n", ret);
275 /* Switch to graphics mode */
276 dprintf(5, "Switching to graphics mode\n");
277 memset(&br, 0, sizeof(br));
279 br.bx = (1 << 14) | videomode;
282 dprintf(1, "set_mode failed.\n");
286 /* Show the picture */
287 dprintf(5, "Showing bootsplash picture\n");
288 iomemcpy(framebuffer, picture, imagesize);
289 dprintf(5, "Bootsplash copy complete\n");
290 BootsplashActive = 1;
303 disable_bootsplash(void)
305 if (!CONFIG_BOOTSPLASH || !BootsplashActive)
307 BootsplashActive = 0;
308 enable_vga_console();