1// SPDX-License-Identifier: GPL-2.0
2#include <linux/screen_info.h>
3#include <linux/init.h>
4
5#include <asm/bootparam.h>
6#include <asm/setup.h>
7
8#include <xen/interface/xen.h>
9
10#include "xen-ops.h"
11
12void __init xen_init_vga(const struct dom0_vga_console_info *info, size_t size,
13 struct screen_info *screen_info)
14{
15 /* This is drawn from a dump from vgacon:startup in
16 * standard Linux. */
17 screen_info->orig_video_mode = 3;
18 screen_info->orig_video_isVGA = 1;
19 screen_info->orig_video_lines = 25;
20 screen_info->orig_video_cols = 80;
21 screen_info->orig_video_ega_bx = 3;
22 screen_info->orig_video_points = 16;
23 screen_info->orig_y = screen_info->orig_video_lines - 1;
24
25 switch (info->video_type) {
26 case XEN_VGATYPE_TEXT_MODE_3:
27 if (size < offsetof(struct dom0_vga_console_info, u.text_mode_3)
28 + sizeof(info->u.text_mode_3))
29 break;
30 screen_info->orig_video_lines = info->u.text_mode_3.rows;
31 screen_info->orig_video_cols = info->u.text_mode_3.columns;
32 screen_info->orig_x = info->u.text_mode_3.cursor_x;
33 screen_info->orig_y = info->u.text_mode_3.cursor_y;
34 screen_info->orig_video_points =
35 info->u.text_mode_3.font_height;
36 break;
37
38 case XEN_VGATYPE_EFI_LFB:
39 case XEN_VGATYPE_VESA_LFB:
40 if (size < offsetof(struct dom0_vga_console_info,
41 u.vesa_lfb.gbl_caps))
42 break;
43 screen_info->orig_video_isVGA = VIDEO_TYPE_VLFB;
44 screen_info->lfb_width = info->u.vesa_lfb.width;
45 screen_info->lfb_height = info->u.vesa_lfb.height;
46 screen_info->lfb_depth = info->u.vesa_lfb.bits_per_pixel;
47 screen_info->lfb_base = info->u.vesa_lfb.lfb_base;
48 screen_info->lfb_size = info->u.vesa_lfb.lfb_size;
49 screen_info->lfb_linelength = info->u.vesa_lfb.bytes_per_line;
50 screen_info->red_size = info->u.vesa_lfb.red_size;
51 screen_info->red_pos = info->u.vesa_lfb.red_pos;
52 screen_info->green_size = info->u.vesa_lfb.green_size;
53 screen_info->green_pos = info->u.vesa_lfb.green_pos;
54 screen_info->blue_size = info->u.vesa_lfb.blue_size;
55 screen_info->blue_pos = info->u.vesa_lfb.blue_pos;
56 screen_info->rsvd_size = info->u.vesa_lfb.rsvd_size;
57 screen_info->rsvd_pos = info->u.vesa_lfb.rsvd_pos;
58
59 if (size >= offsetof(struct dom0_vga_console_info,
60 u.vesa_lfb.ext_lfb_base)
61 + sizeof(info->u.vesa_lfb.ext_lfb_base)
62 && info->u.vesa_lfb.ext_lfb_base) {
63 screen_info->ext_lfb_base = info->u.vesa_lfb.ext_lfb_base;
64 screen_info->capabilities |= VIDEO_CAPABILITY_64BIT_BASE;
65 }
66
67 if (info->video_type == XEN_VGATYPE_EFI_LFB) {
68 screen_info->orig_video_isVGA = VIDEO_TYPE_EFI;
69 break;
70 }
71
72 if (size >= offsetof(struct dom0_vga_console_info,
73 u.vesa_lfb.mode_attrs)
74 + sizeof(info->u.vesa_lfb.mode_attrs))
75 screen_info->vesa_attributes = info->u.vesa_lfb.mode_attrs;
76 break;
77 }
78}
79

source code of linux/arch/x86/xen/vga.c