include/linux/screen_info.h

#ifndef _SCREEN_INFO_H
#define _SCREEN_INFO_H

#include <linux/types.h>

/*
 * These are set up by the setup-routine at boot-time:
 */

struct screen_info {
	u8  orig_x;		/* 0x00 */
	u8  orig_y;		/* 0x01 */
	u16 dontuse1;		/* 0x02 -- EXT_MEM_K sits here */
	u16 orig_video_page;	/* 0x04 */
	u8  orig_video_mode;	/* 0x06 */
	u8  orig_video_cols;	/* 0x07 */
	u16 unused2;		/* 0x08 */
	u16 orig_video_ega_bx;	/* 0x0a */
	u16 unused3;		/* 0x0c */
	u8  orig_video_lines;	/* 0x0e */
	u8  orig_video_isVGA;	/* 0x0f */
	u16 orig_video_points;	/* 0x10 */

	/* VESA graphic mode -- linear frame buffer */
	u16 lfb_width;		/* 0x12 */
	u16 lfb_height;		/* 0x14 */
	u16 lfb_depth;		/* 0x16 */
	u32 lfb_base;		/* 0x18 */
	u32 lfb_size;		/* 0x1c */
	u16 dontuse2, dontuse3;	/* 0x20 -- CL_MAGIC and CL_OFFSET here */
	u16 lfb_linelength;	/* 0x24 */
	u8  red_size;		/* 0x26 */
	u8  red_pos;		/* 0x27 */
	u8  green_size;		/* 0x28 */
	u8  green_pos;		/* 0x29 */
	u8  blue_size;		/* 0x2a */
	u8  blue_pos;		/* 0x2b */
	u8  rsvd_size;		/* 0x2c */
	u8  rsvd_pos;		/* 0x2d */
	u16 vesapm_seg;		/* 0x2e */
	u16 vesapm_off;		/* 0x30 */
	u16 pages;		/* 0x32 */
	u16 vesa_attributes;	/* 0x34 */
	u32 capabilities;       /* 0x36 */
				/* 0x3a -- 0x3b reserved for future expansion */
				/* 0x3c -- 0x3f micro stack for relocatable kernels */
};

extern struct screen_info screen_info;

#define ORIG_X			(screen_info.orig_x)
#define ORIG_Y			(screen_info.orig_y)
#define ORIG_VIDEO_MODE		(screen_info.orig_video_mode)
#define ORIG_VIDEO_COLS 	(screen_info.orig_video_cols)
#define ORIG_VIDEO_EGA_BX	(screen_info.orig_video_ega_bx)
#define ORIG_VIDEO_LINES	(screen_info.orig_video_lines)
#define ORIG_VIDEO_ISVGA	(screen_info.orig_video_isVGA)
#define ORIG_VIDEO_POINTS       (screen_info.orig_video_points)

#define VIDEO_TYPE_MDA		0x10	/* Monochrome Text Display	*/
#define VIDEO_TYPE_CGA		0x11	/* CGA Display 			*/
#define VIDEO_TYPE_EGAM		0x20	/* EGA/VGA in Monochrome Mode	*/
#define VIDEO_TYPE_EGAC		0x21	/* EGA in Color Mode		*/
#define VIDEO_TYPE_VGAC		0x22	/* VGA+ in Color Mode		*/
#define VIDEO_TYPE_VLFB		0x23	/* VESA VGA in graphic mode	*/

#define VIDEO_TYPE_PICA_S3	0x30	/* ACER PICA-61 local S3 video	*/
#define VIDEO_TYPE_MIPS_G364	0x31    /* MIPS Magnum 4000 G364 video  */
#define VIDEO_TYPE_SGI          0x33    /* Various SGI graphics hardware */

#define VIDEO_TYPE_TGAC		0x40	/* DEC TGA */

#define VIDEO_TYPE_SUN          0x50    /* Sun frame buffer. */
#define VIDEO_TYPE_SUNPCI       0x51    /* Sun PCI based frame buffer. */

#define VIDEO_TYPE_PMAC		0x60	/* PowerMacintosh frame buffer. */

#endif /* _SCREEN_INFO_H */