cregit-Linux how code gets into the kernel

Release 4.7 include/uapi/linux/screen_info.h

#ifndef _UAPI_SCREEN_INFO_H

#define _UAPI_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 ext_mem_k;	/* 0x02 */
	
__u16 orig_video_page;	/* 0x04 */
	
__u8  orig_video_mode;	/* 0x06 */
	
__u8  orig_video_cols;	/* 0x07 */
	
__u8  flags;		/* 0x08 */
	
__u8  unused2;		/* 0x09 */
	
__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 cl_magic, cl_offset; /* 0x20 */
	
__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 */
	
__u32 ext_lfb_base;	/* 0x3a */
	
__u8  _reserved[2];	/* 0x3e */
} __attribute__((packed));


#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. */


#define VIDEO_TYPE_EFI		0x70	
/* EFI graphic mode             */


#define VIDEO_FLAGS_NOCURSOR	(1 << 0) 
/* The video mode has no cursor set */


#define VIDEO_CAPABILITY_SKIP_QUIRKS	(1 << 0)

#define VIDEO_CAPABILITY_64BIT_BASE	(1 << 1)	
/* Frame buffer base is 64-bit */

#endif /* _UAPI_SCREEN_INFO_H */

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