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
11void __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