| // Initialize the VGA console and possibly show a boot splash image. |
| // |
| // Copyright (C) 2009-2010 coresystems GmbH |
| // Copyright (C) 2010 Kevin O'Connor <kevin@koconnor.net> |
| // |
| // This file may be distributed under the terms of the GNU LGPLv3 license. |
| |
| #include "bregs.h" // struct bregs |
| #include "config.h" // CONFIG_* |
| #include "farptr.h" // FLATPTR_TO_SEG |
| #include "malloc.h" // free |
| #include "output.h" // dprintf |
| #include "romfile.h" // romfile_loadfile |
| #include "stacks.h" // call16_int |
| #include "std/vbe.h" // struct vbe_info |
| #include "string.h" // memset |
| #include "util.h" // enable_bootsplash |
| |
| |
| /**************************************************************** |
| * Helper functions |
| ****************************************************************/ |
| |
| // Call int10 vga handler. |
| static void |
| call16_int10(struct bregs *br) |
| { |
| br->flags = F_IF; |
| start_preempt(); |
| call16_int(0x10, br); |
| finish_preempt(); |
| } |
| |
| |
| /**************************************************************** |
| * VGA text / graphics console |
| ****************************************************************/ |
| |
| void |
| enable_vga_console(void) |
| { |
| dprintf(1, "Turning on vga text mode console\n"); |
| struct bregs br; |
| |
| /* Enable VGA text mode */ |
| memset(&br, 0, sizeof(br)); |
| br.ax = 0x0003; |
| call16_int10(&br); |
| |
| // Write to screen. |
| printf("SeaBIOS (version %s)\n", VERSION); |
| display_uuid(); |
| } |
| |
| static int |
| find_videomode(struct vbe_info *vesa_info, struct vbe_mode_info *mode_info |
| , int width, int height, int bpp_req) |
| { |
| dprintf(3, "Finding vesa mode with dimensions %d/%d\n", width, height); |
| u16 *videomodes = SEGOFF_TO_FLATPTR(vesa_info->video_mode); |
| for (;; videomodes++) { |
| u16 videomode = *videomodes; |
| if (videomode == 0xffff) { |
| dprintf(1, "Unable to find vesa video mode dimensions %d/%d\n" |
| , width, height); |
| return -1; |
| } |
| struct bregs br; |
| memset(&br, 0, sizeof(br)); |
| br.ax = 0x4f01; |
| br.cx = videomode; |
| br.di = FLATPTR_TO_OFFSET(mode_info); |
| br.es = FLATPTR_TO_SEG(mode_info); |
| call16_int10(&br); |
| if (br.ax != 0x4f) { |
| dprintf(1, "get_mode failed.\n"); |
| continue; |
| } |
| if (mode_info->xres != width |
| || mode_info->yres != height) |
| continue; |
| u8 depth = mode_info->bits_per_pixel; |
| if (bpp_req == 0) { |
| if (depth != 16 && depth != 24 && depth != 32) |
| continue; |
| } else { |
| if (depth != bpp_req) |
| continue; |
| } |
| return videomode; |
| } |
| } |
| |
| static int BootsplashActive; |
| |
| void |
| enable_bootsplash(void) |
| { |
| if (!CONFIG_BOOTSPLASH) |
| return; |
| /* splash picture can be bmp or jpeg file */ |
| dprintf(3, "Checking for bootsplash\n"); |
| u8 type = 0; /* 0 means jpg, 1 means bmp, default is 0=jpg */ |
| int filesize; |
| u8 *filedata = romfile_loadfile("bootsplash.jpg", &filesize); |
| if (!filedata) { |
| filedata = romfile_loadfile("bootsplash.bmp", &filesize); |
| if (!filedata) |
| return; |
| type = 1; |
| } |
| dprintf(3, "start showing bootsplash\n"); |
| |
| u8 *picture = NULL; /* data buff used to be flushed to the video buf */ |
| struct jpeg_decdata *jpeg = NULL; |
| struct bmp_decdata *bmp = NULL; |
| struct vbe_info *vesa_info = malloc_tmplow(sizeof(*vesa_info)); |
| struct vbe_mode_info *mode_info = malloc_tmplow(sizeof(*mode_info)); |
| if (!vesa_info || !mode_info) { |
| warn_noalloc(); |
| goto done; |
| } |
| |
| /* Check whether we have a VESA 2.0 compliant BIOS */ |
| memset(vesa_info, 0, sizeof(struct vbe_info)); |
| vesa_info->signature = VBE2_SIGNATURE; |
| struct bregs br; |
| memset(&br, 0, sizeof(br)); |
| br.ax = 0x4f00; |
| br.di = FLATPTR_TO_OFFSET(vesa_info); |
| br.es = FLATPTR_TO_SEG(vesa_info); |
| call16_int10(&br); |
| if (vesa_info->signature != VESA_SIGNATURE) { |
| dprintf(1,"No VBE2 found.\n"); |
| goto done; |
| } |
| |
| /* Print some debugging information about our card. */ |
| char *vendor = SEGOFF_TO_FLATPTR(vesa_info->oem_vendor_string); |
| char *product = SEGOFF_TO_FLATPTR(vesa_info->oem_product_string); |
| dprintf(3, "VESA %d.%d\nVENDOR: %s\nPRODUCT: %s\n", |
| vesa_info->version>>8, vesa_info->version&0xff, |
| vendor, product); |
| |
| int ret, width, height; |
| int bpp_require = 0; |
| if (type == 0) { |
| jpeg = jpeg_alloc(); |
| if (!jpeg) { |
| warn_noalloc(); |
| goto done; |
| } |
| /* Parse jpeg and get image size. */ |
| dprintf(5, "Decoding bootsplash.jpg\n"); |
| ret = jpeg_decode(jpeg, filedata); |
| if (ret) { |
| dprintf(1, "jpeg_decode failed with return code %d...\n", ret); |
| goto done; |
| } |
| jpeg_get_size(jpeg, &width, &height); |
| } else { |
| bmp = bmp_alloc(); |
| if (!bmp) { |
| warn_noalloc(); |
| goto done; |
| } |
| /* Parse bmp and get image size. */ |
| dprintf(5, "Decoding bootsplash.bmp\n"); |
| ret = bmp_decode(bmp, filedata, filesize); |
| if (ret) { |
| dprintf(1, "bmp_decode failed with return code %d...\n", ret); |
| goto done; |
| } |
| bmp_get_size(bmp, &width, &height); |
| bpp_require = 24; |
| } |
| /* jpeg would use 16 or 24 bpp video mode, BMP use 24bpp mode only */ |
| |
| // Try to find a graphics mode with the corresponding dimensions. |
| int videomode = find_videomode(vesa_info, mode_info, width, height, |
| bpp_require); |
| if (videomode < 0) { |
| dprintf(1, "failed to find a videomode with %dx%d %dbpp (0=any).\n", |
| width, height, bpp_require); |
| goto done; |
| } |
| void *framebuffer = (void *)mode_info->phys_base; |
| int depth = mode_info->bits_per_pixel; |
| dprintf(3, "mode: %04x\n", videomode); |
| dprintf(3, "framebuffer: %p\n", framebuffer); |
| dprintf(3, "bytes per scanline: %d\n", mode_info->bytes_per_scanline); |
| dprintf(3, "bits per pixel: %d\n", depth); |
| |
| // Allocate space for image and decompress it. |
| int imagesize = height * mode_info->bytes_per_scanline; |
| picture = malloc_tmphigh(imagesize); |
| if (!picture) { |
| warn_noalloc(); |
| goto done; |
| } |
| |
| if (type == 0) { |
| dprintf(5, "Decompressing bootsplash.jpg\n"); |
| ret = jpeg_show(jpeg, picture, width, height, depth, |
| mode_info->bytes_per_scanline); |
| if (ret) { |
| dprintf(1, "jpeg_show failed with return code %d...\n", ret); |
| goto done; |
| } |
| } else { |
| dprintf(5, "Decompressing bootsplash.bmp\n"); |
| ret = bmp_show(bmp, picture, width, height, depth, |
| mode_info->bytes_per_scanline); |
| if (ret) { |
| dprintf(1, "bmp_show failed with return code %d...\n", ret); |
| goto done; |
| } |
| } |
| |
| /* Switch to graphics mode */ |
| dprintf(5, "Switching to graphics mode\n"); |
| memset(&br, 0, sizeof(br)); |
| br.ax = 0x4f02; |
| br.bx = videomode | VBE_MODE_LINEAR_FRAME_BUFFER; |
| call16_int10(&br); |
| if (br.ax != 0x4f) { |
| dprintf(1, "set_mode failed.\n"); |
| goto done; |
| } |
| |
| /* Show the picture */ |
| dprintf(5, "Showing bootsplash picture\n"); |
| iomemcpy(framebuffer, picture, imagesize); |
| dprintf(5, "Bootsplash copy complete\n"); |
| BootsplashActive = 1; |
| |
| done: |
| free(filedata); |
| free(picture); |
| free(vesa_info); |
| free(mode_info); |
| free(jpeg); |
| free(bmp); |
| return; |
| } |
| |
| void |
| disable_bootsplash(void) |
| { |
| if (!CONFIG_BOOTSPLASH || !BootsplashActive) |
| return; |
| BootsplashActive = 0; |
| enable_vga_console(); |
| } |
