1 // SPDX-License-Identifier: GPL-2.0
2 #include <linux/screen_info.h>
3 #include <linux/init.h>
4
5 #include <asm/setup.h>
6
7 #include <xen/interface/xen.h>
8
9 #include "xen-ops.h"
10
11 void __init xen_init_vga(const struct dom0_vga_console_info *info, size_t size,
12 struct screen_info *screen_info)
13 {
14 /* This is drawn from a dump from vgacon:startup in
15 * standard Linux. */
16 screen_info->orig_video_mode = 3;
17 screen_info->orig_video_isVGA = 1;
18 screen_info->orig_video_lines = 25;
19 screen_info->orig_video_cols = 80;
20 screen_info->orig_video_ega_bx = 3;
21 screen_info->orig_video_points = 16;
22 screen_info->orig_y = screen_info->orig_video_lines - 1;
23
24 switch (info->video_type) {
25 case XEN_VGATYPE_TEXT_MODE_3:
26 if (size < offsetof(struct dom0_vga_console_info, u.text_mode_3)
27 + sizeof(info->u.text_mode_3))
28 break;
29 screen_info->orig_video_lines = info->u.text_mode_3.rows;
30 screen_info->orig_video_cols = info->u.text_mode_3.columns;
31 screen_info->orig_x = info->u.text_mode_3.cursor_x;
32 screen_info->orig_y = info->u.text_mode_3.cursor_y;
33 screen_info->orig_video_points =
34 info->u.text_mode_3.font_height;
35 break;
36
37 case XEN_VGATYPE_EFI_LFB:
38 case XEN_VGATYPE_VESA_LFB:
39 if (size < offsetof(struct dom0_vga_console_info,
40 u.vesa_lfb.gbl_caps))
41 break;
42 screen_info->orig_video_isVGA = VIDEO_TYPE_VLFB;
43 screen_info->lfb_width = info->u.vesa_lfb.width;
44 screen_info->lfb_height = info->u.vesa_lfb.height;
45 screen_info->lfb_depth = info->u.vesa_lfb.bits_per_pixel;
46 screen_info->lfb_base = info->u.vesa_lfb.lfb_base;
47 screen_info->lfb_size = info->u.vesa_lfb.lfb_size;
48 screen_info->lfb_linelength = info->u.vesa_lfb.bytes_per_line;
49 screen_info->red_size = info->u.vesa_lfb.red_size;
50 screen_info->red_pos = info->u.vesa_lfb.red_pos;
51 screen_info->green_size = info->u.vesa_lfb.green_size;
52 screen_info->green_pos = info->u.vesa_lfb.green_pos;
53 screen_info->blue_size = info->u.vesa_lfb.blue_size;
54 screen_info->blue_pos = info->u.vesa_lfb.blue_pos;
55 screen_info->rsvd_size = info->u.vesa_lfb.rsvd_size;
56 screen_info->rsvd_pos = info->u.vesa_lfb.rsvd_pos;
57
58 if (size >= offsetof(struct dom0_vga_console_info,
59 u.vesa_lfb.ext_lfb_base)
60 + sizeof(info->u.vesa_lfb.ext_lfb_base)
61 && info->u.vesa_lfb.ext_lfb_base) {
62 screen_info->ext_lfb_base = info->u.vesa_lfb.ext_lfb_base;
63 screen_info->capabilities |= VIDEO_CAPABILITY_64BIT_BASE;
64 }
65
66 if (info->video_type == XEN_VGATYPE_EFI_LFB) {
67 screen_info->orig_video_isVGA = VIDEO_TYPE_EFI;
68 break;
69 }
70
71 if (size >= offsetof(struct dom0_vga_console_info,
72 u.vesa_lfb.mode_attrs)
73 + sizeof(info->u.vesa_lfb.mode_attrs))
74 screen_info->vesa_attributes = info->u.vesa_lfb.mode_attrs;
75 break;
76 }
77 }
78
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