1 /* ----------------------------------------------------------------------- *
2 *
3 * Copyright 1999-2008 H. Peter Anvin - All Rights Reserved
4 *
5 * Permission is hereby granted, free of charge, to any person
6 * obtaining a copy of this software and associated documentation
7 * files (the "Software"), to deal in the Software without
8 * restriction, including without limitation the rights to use,
9 * copy, modify, merge, publish, distribute, sublicense, and/or
10 * sell copies of the Software, and to permit persons to whom
11 * the Software is furnished to do so, subject to the following
12 * conditions:
13 *
14 * The above copyright notice and this permission notice shall
15 * be included in all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
18 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
19 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
20 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
21 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
22 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
23 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
24 * OTHER DEALINGS IN THE SOFTWARE.
25 *
26 * ----------------------------------------------------------------------- */
27
28 #ifndef LIB_SYS_VESA_H
29 #define LIB_SYS_VESA_H
30
31 #include <syslinux/firmware.h>
32 #include <inttypes.h>
33 #include <com32.h>
34
35 /* VESA General Information table */
36 struct vesa_general_info {
37 uint32_t signature; /* Magic number = "VESA" */
38 uint16_t version;
39 far_ptr_t vendor_string;
40 uint8_t capabilities[4];
41 far_ptr_t video_mode_ptr;
42 uint16_t total_memory;
43
44 uint16_t oem_software_rev;
45 far_ptr_t oem_vendor_name_ptr;
46 far_ptr_t oem_product_name_ptr;
47 far_ptr_t oem_product_rev_ptr;
48
49 uint8_t reserved[222];
50 uint8_t oem_data[256];
51 } __attribute__ ((packed));
52
53 #define VESA_MAGIC ('V' + ('E' << 8) + ('S' << 16) + ('A' << 24))
54 #define VBE2_MAGIC ('V' + ('B' << 8) + ('E' << 16) + ('2' << 24))
55
56 struct vesa_mode_info {
57 uint16_t mode_attr;
58 uint8_t win_attr[2];
59 uint16_t win_grain;
60 uint16_t win_size;
61 uint16_t win_seg[2];
62 far_ptr_t win_scheme;
63 uint16_t logical_scan;
64
65 uint16_t h_res;
66 uint16_t v_res;
67 uint8_t char_width;
68 uint8_t char_height;
69 uint8_t memory_planes;
70 uint8_t bpp;
71 uint8_t banks;
72 uint8_t memory_layout;
73 uint8_t bank_size;
74 uint8_t image_pages;
75 uint8_t page_function;
76
77 uint8_t rmask;
78 uint8_t rpos;
79 uint8_t gmask;
80 uint8_t gpos;
81 uint8_t bmask;
82 uint8_t bpos;
83 uint8_t resv_mask;
84 uint8_t resv_pos;
85 uint8_t dcm_info;
86
87 uint8_t *lfb_ptr; /* Linear frame buffer address */
88 uint8_t *offscreen_ptr; /* Offscreen memory address */
89 uint16_t offscreen_size;
90
91 uint8_t reserved[206];
92 } __attribute__ ((packed));
93
94 struct vesa_info {
95 struct vesa_general_info gi;
96 struct vesa_mode_info mi;
97 };
98
99 extern struct vesa_info __vesa_info;
100
101 #if 0
102 static inline void vesa_debug(uint32_t color, int pos)
103 {
104 uint32_t *stp = (uint32_t *) __vesa_info.mi.lfb_ptr;
105 stp[pos * 3] = color;
106 }
107 #else
vesa_debug(uint32_t color,int pos)108 static inline void vesa_debug(uint32_t color, int pos)
109 {
110 (void)color;
111 (void)pos;
112 }
113 #endif
114
115 #endif /* LIB_SYS_VESA_H */
116