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// 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 *decdata = NULL;
u8 *jpeg = 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));
jpeg = malloc_tmphigh(filesize);
picture = malloc_tmphigh(imagesize);
vesa_info = malloc_tmplow(sizeof(*vesa_info));
mode_info = malloc_tmplow(sizeof(*mode_info));
decdata = jpeg_alloc();
if (!jpeg || !picture || !vesa_info || !mode_info || !decdata) {
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, jpeg, filesize);
dprintf(8, "Decompressing boot splash screen...\n");
int ret = jpeg_decode(decdata, jpeg);
if (ret) {
dprintf(1, "jpeg_decode failed with return code %d...\n", ret);
goto gotext;
}
ret = jpeg_show(decdata, 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(jpeg);
free(picture);
free(vesa_info);
free(mode_info);
free(decdata);
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();
}
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