1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /* ----------------------------------------------------------------------- *
3 *
4 * Copyright 1999-2007 H. Peter Anvin - All Rights Reserved
5 *
6 * ----------------------------------------------------------------------- */
7
8 #ifndef BOOT_VESA_H
9 #define BOOT_VESA_H
10
11 typedef struct {
12 u16 off, seg;
13 } far_ptr;
14
15 /* VESA General Information table */
16 struct vesa_general_info {
17 u32 signature; /* 0 Magic number = "VESA" */
18 u16 version; /* 4 */
19 far_ptr vendor_string; /* 6 */
20 u32 capabilities; /* 10 */
21 far_ptr video_mode_ptr; /* 14 */
22 u16 total_memory; /* 18 */
23
24 u8 reserved[236]; /* 20 */
25 } __attribute__ ((packed));
26
27 #define VESA_MAGIC ('V' + ('E' << 8) + ('S' << 16) + ('A' << 24))
28
29 struct vesa_mode_info {
30 u16 mode_attr; /* 0 */
31 u8 win_attr[2]; /* 2 */
32 u16 win_grain; /* 4 */
33 u16 win_size; /* 6 */
34 u16 win_seg[2]; /* 8 */
35 far_ptr win_scheme; /* 12 */
36 u16 logical_scan; /* 16 */
37
38 u16 h_res; /* 18 */
39 u16 v_res; /* 20 */
40 u8 char_width; /* 22 */
41 u8 char_height; /* 23 */
42 u8 memory_planes; /* 24 */
43 u8 bpp; /* 25 */
44 u8 banks; /* 26 */
45 u8 memory_layout; /* 27 */
46 u8 bank_size; /* 28 */
47 u8 image_planes; /* 29 */
48 u8 page_function; /* 30 */
49
50 u8 rmask; /* 31 */
51 u8 rpos; /* 32 */
52 u8 gmask; /* 33 */
53 u8 gpos; /* 34 */
54 u8 bmask; /* 35 */
55 u8 bpos; /* 36 */
56 u8 resv_mask; /* 37 */
57 u8 resv_pos; /* 38 */
58 u8 dcm_info; /* 39 */
59
60 u32 lfb_ptr; /* 40 Linear frame buffer address */
61 u32 offscreen_ptr; /* 44 Offscreen memory address */
62 u16 offscreen_size; /* 48 */
63
64 u8 reserved[206]; /* 50 */
65 } __attribute__ ((packed));
66
67 #endif /* LIB_SYS_VESA_H */
68
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