| // 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 |
| |
| |
| /**************************************************************** |
| * 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; |
| u32 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 |
| ****************************************************************/ |
| |
| static void enable_vga_text_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); |
| } |
| |
| void enable_vga_console(void) |
| { |
| struct vesa_info *vesa_info = NULL; |
| struct vesa_mode_info *mode_info = NULL; |
| struct jpeg_decdata *jpeg = NULL; |
| u8 *filedata = NULL, *picture = NULL; |
| |
| /* Needs coreboot support for CBFS */ |
| if (!CONFIG_BOOTSPLASH || !CONFIG_COREBOOT) |
| goto gotext; |
| struct cbfs_file *file = cbfs_finddatafile("bootsplash.jpg"); |
| if (!file) |
| goto gotext; |
| int filesize = cbfs_datasize(file); |
| |
| int imagesize = (CONFIG_BOOTSPLASH_X * CONFIG_BOOTSPLASH_Y * |
| (CONFIG_BOOTSPLASH_DEPTH / 8)); |
| filedata = malloc_tmphigh(filesize); |
| picture = malloc_tmphigh(imagesize); |
| vesa_info = malloc_tmplow(sizeof(*vesa_info)); |
| mode_info = malloc_tmplow(sizeof(*mode_info)); |
| jpeg = jpeg_alloc(); |
| if (!filedata || !picture || !vesa_info || !mode_info || !jpeg) { |
| warn_noalloc(); |
| goto gotext; |
| } |
| |
| /* 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 gotext; |
| } |
| |
| /* 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(8, "VESA %d.%d\nVENDOR: %s\nPRODUCT: %s\n", |
| vesa_info->vesa_version>>8, vesa_info->vesa_version&0xff, |
| vendor, product); |
| |
| /* Get information about our graphics mode, like the |
| * framebuffer start address |
| */ |
| memset(&br, 0, sizeof(br)); |
| br.ax = 0x4f01; |
| br.cx = (1 << 14) | CONFIG_BOOTSPLASH_VESA_MODE; |
| 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"); |
| goto gotext; |
| } |
| unsigned char *framebuffer = (unsigned char *) (mode_info->phys_base_ptr); |
| |
| /* Switch to graphics mode */ |
| memset(&br, 0, sizeof(br)); |
| br.ax = 0x4f02; |
| br.bx = (1 << 14) | CONFIG_BOOTSPLASH_VESA_MODE; |
| call16_int10(&br); |
| if (br.ax != 0x4f) { |
| dprintf(1, "set_mode failed.\n"); |
| goto gotext; |
| } |
| |
| dprintf(8, "framebuffer: %x\n", (u32)framebuffer); |
| dprintf(8, "bytes per scanline: %d\n", mode_info->bytes_per_scanline); |
| dprintf(8, "bits per pixel: %d\n", mode_info->bits_per_pixel); |
| |
| /* Decompress jpeg */ |
| dprintf(8, "Copying boot splash screen...\n"); |
| cbfs_copyfile(file, filedata, filesize); |
| dprintf(8, "Decompressing boot splash screen...\n"); |
| int ret = jpeg_decode(jpeg, filedata); |
| if (ret) { |
| dprintf(1, "jpeg_decode failed with return code %d...\n", ret); |
| goto gotext; |
| } |
| ret = jpeg_show(jpeg, picture, CONFIG_BOOTSPLASH_X, CONFIG_BOOTSPLASH_Y |
| , CONFIG_BOOTSPLASH_DEPTH); |
| if (ret) { |
| dprintf(1, "jpeg_show failed with return code %d...\n", ret); |
| goto gotext; |
| } |
| |
| /* Show the picture */ |
| iomemcpy(framebuffer, picture, imagesize); |
| SET_EBDA(bootsplash_active, 1); |
| |
| cleanup: |
| free(filedata); |
| free(picture); |
| free(vesa_info); |
| free(mode_info); |
| free(jpeg); |
| return; |
| gotext: |
| enable_vga_text_console(); |
| goto cleanup; |
| } |
| |
| void |
| disable_bootsplash(void) |
| { |
| if (! CONFIG_BOOTSPLASH || !GET_EBDA(bootsplash_active)) |
| return; |
| SET_EBDA(bootsplash_active, 0); |
| enable_vga_text_console(); |
| } |