VBE support is partially added.

stage2/shared.h

@@ -420,6 +420,83 @@ struct mmar_desc
   unsigned long type;		/* Type of address range. */
 };
 
+/* VBE controller information.  */
+struct vbe_controller
+{
+  unsigned char signature[4];
+  unsigned short version;
+  unsigned long oem_string;
+  unsigned long capabilities;
+  unsigned long video_mode;
+  unsigned short total_memory;
+  unsigned short oem_software_rev;
+  unsigned long oem_vendor_name;
+  unsigned long oem_product_name;
+  unsigned long oem_product_rev;
+  unsigned char reserved[222];
+  unsigned char oem_data[256];
+} __attribute__ ((packed));
+
+/* VBE mode information.  */
+struct vbe_mode
+{
+  unsigned short mode_attributes;
+  unsigned char win_a_attributes;
+  unsigned char win_b_attributes;
+  unsigned short win_granularity;
+  unsigned short win_size;
+  unsigned short win_a_segment;
+  unsigned short win_b_segment;
+  unsigned long win_func;
+  unsigned short bytes_per_scanline;
+
+  /* >=1.2 */
+  unsigned short x_resolution;
+  unsigned short y_resolution;
+  unsigned char x_char_size;
+  unsigned char y_char_size;
+  unsigned char number_of_planes;
+  unsigned char bits_per_pixel;
+  unsigned char number_of_banks;
+  unsigned char memory_model;
+  unsigned char bank_size;
+  unsigned char number_of_image_pages;
+  unsigned char reserved0;
+
+  /* direct color */
+  unsigned char red_mask_size;
+  unsigned char red_field_position;
+  unsigned char green_mask_size;
+  unsigned char green_field_position;
+  unsigned char blue_mask_size;
+  unsigned char blue_field_position;
+  unsigned char reserved_mask_size;
+  unsigned char reserved_field_position;
+  unsigned char direct_color_mode_info;
+
+  /* >=2.0 */
+  unsigned long phys_base;
+  unsigned long reserved1;
+  unsigned short reversed2;
+
+  /* >=3.0 */
+  unsigned short linear_bytes_per_scanline;
+  unsigned char banked_number_of_image_pages;
+  unsigned char linear_number_of_image_pages;
+  unsigned char linear_red_mask_size;
+  unsigned char linear_red_field_position;
+  unsigned char linear_green_mask_size;
+  unsigned char linear_green_field_position;
+  unsigned char linear_blue_mask_size;
+  unsigned char linear_blue_field_position;
+  unsigned char linear_reserved_mask_size;
+  unsigned char linear_reserved_field_position;
+  unsigned long max_pixel_clock;
+
+  unsigned char reserved3[189];
+} __attribute__ ((packed));
+
+
 #undef NULL
 #define NULL         ((void *) 0)
 
@@ -662,6 +739,15 @@ unsigned long get_rom_config_table (void);
 /* Get APM BIOS information.  */
 void get_apm_info (void);
 
+/* Get VBE controller information.  */
+int get_vbe_controller_info (struct vbe_controller *controller);
+
+/* Get VBE mode information.  */
+int get_vbe_mode_info (int mode_number, struct vbe_mode *mode);
+
+/* Set VBE mode.  */
+int set_vbe_mode (int mode_number);
+
 /* Return the data area immediately following our code. */
 int get_code_end (void);