blob: 5d40ca7a1d8901c021ff7be1dd9424ddb6296cbf (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
|
/* SPDX-License-Identifier: GPL-2.0-only */
/*
* coreboot.h
*
* Coreboot device and driver interfaces.
*
* Copyright 2014 Gerd Hoffmann <kraxel@redhat.com>
* Copyright 2017 Google Inc.
* Copyright 2017 Samuel Holland <samuel@sholland.org>
*/
#ifndef _LINUX_COREBOOT_H
#define _LINUX_COREBOOT_H
#include <linux/compiler_attributes.h>
#include <linux/stddef.h>
#include <linux/types.h>
typedef __aligned(4) u64 cb_u64;
/* List of coreboot entry structures that is used */
#define CB_TAG_FRAMEBUFFER 0x12
#define LB_TAG_CBMEM_ENTRY 0x31
/* Generic */
struct coreboot_table_entry {
u32 tag;
u32 size;
};
/* Points to a CBMEM entry */
struct lb_cbmem_ref {
u32 tag;
u32 size;
cb_u64 cbmem_addr;
};
/* Corresponds to LB_TAG_CBMEM_ENTRY */
struct lb_cbmem_entry {
u32 tag;
u32 size;
cb_u64 address;
u32 entry_size;
u32 id;
};
#define LB_FRAMEBUFFER_ORIENTATION_NORMAL 0
#define LB_FRAMEBUFFER_ORIENTATION_BOTTOM_UP 1
#define LB_FRAMEBUFFER_ORIENTATION_LEFT_UP 2
#define LB_FRAMEBUFFER_ORIENTATION_RIGHT_UP 3
/* Describes framebuffer setup by coreboot */
struct lb_framebuffer {
u32 tag;
u32 size;
cb_u64 physical_address;
u32 x_resolution;
u32 y_resolution;
u32 bytes_per_line;
u8 bits_per_pixel;
u8 red_mask_pos;
u8 red_mask_size;
u8 green_mask_pos;
u8 green_mask_size;
u8 blue_mask_pos;
u8 blue_mask_size;
u8 reserved_mask_pos;
u8 reserved_mask_size;
u8 orientation;
};
/*
* True if the coreboot-provided data is large enough to hold information
* on the linear framebuffer. False otherwise.
*/
#define LB_FRAMEBUFFER_HAS_LFB(__fb) \
((__fb)->size >= offsetofend(struct lb_framebuffer, reserved_mask_size))
/*
* True if the coreboot-provided data is large enough to hold information
* on the display orientation. False otherwise.
*/
#define LB_FRAMEBUFFER_HAS_ORIENTATION(__fb) \
((__fb)->size >= offsetofend(struct lb_framebuffer, orientation))
#endif /* _LINUX_COREBOOT_H */
|
