1 /* ----------------------------------------------------------------------- *
2  *
3  *   Copyright 1999-2007 H. Peter Anvin - All Rights Reserved
4  *
5  *   This program is free software; you can redistribute it and/or modify
6  *   it under the terms of the GNU General Public License as published by
7  *   the Free Software Foundation, Inc., 53 Temple Place Ste 330,
8  *   Boston MA 02111-1307, USA; either version 2 of the License, or
9  *   (at your option) any later version; incorporated herein by reference.
10  *
11  * ----------------------------------------------------------------------- */
12 
13 #ifndef BOOT_VESA_H
14 #define BOOT_VESA_H
15 
16 typedef struct {
17 	u16 off, seg;
18 } far_ptr;
19 
20 /* VESA General Information table */
21 struct vesa_general_info {
22 	u32 signature;		/* 0 Magic number = "VESA" */
23 	u16 version;		/* 4 */
24 	far_ptr vendor_string;	/* 6 */
25 	u32 capabilities;	/* 10 */
26 	far_ptr video_mode_ptr;	/* 14 */
27 	u16 total_memory;	/* 18 */
28 
29 	u8 reserved[236];	/* 20 */
30 } __attribute__ ((packed));
31 
32 #define VESA_MAGIC ('V' + ('E' << 8) + ('S' << 16) + ('A' << 24))
33 
34 struct vesa_mode_info {
35 	u16 mode_attr;		/* 0 */
36 	u8 win_attr[2];		/* 2 */
37 	u16 win_grain;		/* 4 */
38 	u16 win_size;		/* 6 */
39 	u16 win_seg[2];		/* 8 */
40 	far_ptr win_scheme;	/* 12 */
41 	u16 logical_scan;	/* 16 */
42 
43 	u16 h_res;		/* 18 */
44 	u16 v_res;		/* 20 */
45 	u8 char_width;		/* 22 */
46 	u8 char_height;		/* 23 */
47 	u8 memory_planes;	/* 24 */
48 	u8 bpp;			/* 25 */
49 	u8 banks;		/* 26 */
50 	u8 memory_layout;	/* 27 */
51 	u8 bank_size;		/* 28 */
52 	u8 image_planes;	/* 29 */
53 	u8 page_function;	/* 30 */
54 
55 	u8 rmask;		/* 31 */
56 	u8 rpos;		/* 32 */
57 	u8 gmask;		/* 33 */
58 	u8 gpos;		/* 34 */
59 	u8 bmask;		/* 35 */
60 	u8 bpos;		/* 36 */
61 	u8 resv_mask;		/* 37 */
62 	u8 resv_pos;		/* 38 */
63 	u8 dcm_info;		/* 39 */
64 
65 	u32 lfb_ptr;		/* 40 Linear frame buffer address */
66 	u32 offscreen_ptr;	/* 44 Offscreen memory address */
67 	u16 offscreen_size;	/* 48 */
68 
69 	u8 reserved[206];	/* 50 */
70 } __attribute__ ((packed));
71 
72 #endif				/* LIB_SYS_VESA_H */
73