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

 
 1#include <linux/screen_info.h>
 2#include <linux/init.h>
 3
 4#include <asm/bootparam.h>
 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{
13	struct screen_info *screen_info = &boot_params.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_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		if (size >= offsetof(struct dom0_vga_console_info,
58				     u.vesa_lfb.gbl_caps)
59		    + sizeof(info->u.vesa_lfb.gbl_caps))
60			screen_info->capabilities = info->u.vesa_lfb.gbl_caps;
 
 
 
 
 
 
 
 
 
61		if (size >= offsetof(struct dom0_vga_console_info,
62				     u.vesa_lfb.mode_attrs)
63		    + sizeof(info->u.vesa_lfb.mode_attrs))
64			screen_info->vesa_attributes = info->u.vesa_lfb.mode_attrs;
65		break;
66	}
67}