| // Option rom scanning code. |
| // |
| // 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 "farptr.h" // FLATPTR_TO_SEG |
| #include "config.h" // CONFIG_* |
| #include "util.h" // dprintf |
| #include "jpeg.h" // splash |
| #include "biosvar.h" // SET_EBDA |
| #include "paravirt.h" // romfile_find |
| |
| |
| /**************************************************************** |
| * VESA structures |
| ****************************************************************/ |
| |
| struct vesa_info { |
| u32 vesa_signature; |
| u16 vesa_version; |
| struct segoff_s oem_string_ptr; |
| u8 capabilities[4]; |
| struct segoff_s video_mode_ptr; |
| u16 total_memory; |
| u16 oem_software_rev; |
| struct segoff_s oem_vendor_name_ptr; |
| struct segoff_s oem_product_name_ptr; |
| struct segoff_s oem_product_rev_ptr; |
| u8 reserved[222]; |
| u8 oem_data[256]; |
| } PACKED; |
| |
| #define VESA_SIGNATURE 0x41534556 // VESA |
| #define VBE2_SIGNATURE 0x32454256 // VBE2 |
| |
| struct vesa_mode_info { |
| u16 mode_attributes; |
| u8 win_a_attributes; |
| u8 win_b_attributes; |
| u16 win_granularity; |
| u16 win_size; |
| u16 win_a_segment; |
| u16 win_b_segment; |
| u32 win_func_ptr; |
| u16 bytes_per_scanline; |
| u16 x_resolution; |
| u16 y_resolution; |
| u8 x_charsize; |
| u8 y_charsize; |
| u8 number_of_planes; |
| u8 bits_per_pixel; |
| u8 number_of_banks; |
| u8 memory_model; |
| u8 bank_size; |
| u8 number_of_image_pages; |
| u8 reserved_page; |
| u8 red_mask_size; |
| u8 red_mask_pos; |
| u8 green_mask_size; |
| u8 green_mask_pos; |
| u8 blue_mask_size; |
| u8 blue_mask_pos; |
| u8 reserved_mask_size; |
| u8 reserved_mask_pos; |
| u8 direct_color_mode_info; |
| void *phys_base_ptr; |
| u32 offscreen_mem_offset; |
| u16 offscreen_mem_size; |
| u8 reserved[206]; |
| } PACKED; |
| |
| |
| /**************************************************************** |
| * 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\n", VERSION); |
| } |
| |
| static int |
| find_videomode(struct vesa_info *vesa_info, struct vesa_mode_info *mode_info |
| , int width, int height) |
| { |
| dprintf(3, "Finding vesa mode with dimensions %d/%d\n", width, height); |
| u16 *videomodes = SEGOFF_TO_FLATPTR(vesa_info->video_mode_ptr); |
| 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 = (1 << 14) | 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->x_resolution != width |
| || mode_info->y_resolution != height) |
| continue; |
| u8 depth = mode_info->bits_per_pixel; |
| if (depth != 16 && depth != 24 && depth != 32) |
| continue; |
| return videomode; |
| } |
| } |
| |
| static int BootsplashActive; |
| |
| void |
| enable_bootsplash(void) |
| { |
| if (!CONFIG_BOOTSPLASH) |
| return; |
| dprintf(3, "Checking for bootsplash\n"); |
| int filesize; |
| u8 *filedata = romfile_loadfile("bootsplash.jpg", &filesize); |
| if (!filedata) |
| return; |
| |
| u8 *picture = NULL; |
| struct vesa_info *vesa_info = malloc_tmplow(sizeof(*vesa_info)); |
| struct vesa_mode_info *mode_info = malloc_tmplow(sizeof(*mode_info)); |
| struct jpeg_decdata *jpeg = jpeg_alloc(); |
| if (!jpeg || !vesa_info || !mode_info) { |
| warn_noalloc(); |
| goto done; |
| } |
| |
| /* Check whether we have a VESA 2.0 compliant BIOS */ |
| memset(vesa_info, 0, sizeof(struct vesa_info)); |
| vesa_info->vesa_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->vesa_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_name_ptr); |
| char *product = SEGOFF_TO_FLATPTR(vesa_info->oem_product_name_ptr); |
| dprintf(3, "VESA %d.%d\nVENDOR: %s\nPRODUCT: %s\n", |
| vesa_info->vesa_version>>8, vesa_info->vesa_version&0xff, |
| vendor, product); |
| |
| // Parse jpeg and get image size. |
| dprintf(5, "Decoding bootsplash.jpg\n"); |
| int ret = jpeg_decode(jpeg, filedata); |
| if (ret) { |
| dprintf(1, "jpeg_decode failed with return code %d...\n", ret); |
| goto done; |
| } |
| int width, height; |
| jpeg_get_size(jpeg, &width, &height); |
| |
| // Try to find a graphics mode with the corresponding dimensions. |
| int videomode = find_videomode(vesa_info, mode_info, width, height); |
| if (videomode < 0) |
| goto done; |
| void *framebuffer = mode_info->phys_base_ptr; |
| 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 = width * height * (depth / 8); |
| picture = malloc_tmphigh(imagesize); |
| if (!picture) { |
| warn_noalloc(); |
| goto done; |
| } |
| dprintf(5, "Decompressing bootsplash.jpg\n"); |
| ret = jpeg_show(jpeg, picture, width, height, depth); |
| if (ret) { |
| dprintf(1, "jpeg_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 = (1 << 14) | videomode; |
| call16_int10(&br); |
| if (br.ax != 0x4f) { |
| dprintf(1, "set_mode failed.\n"); |
| goto done; |
| } |
| |
| /* Show the picture */ |
| dprintf(5, "Showing bootsplash.jpg\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); |
| return; |
| } |
| |
| void |
| disable_bootsplash(void) |
| { |
| if (!CONFIG_BOOTSPLASH || !BootsplashActive) |
| return; |
| BootsplashActive = 0; |
| enable_vga_console(); |
| } |