LXR linux/arch/x86/xen/vga.c

   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 (info->video_type == XEN_VGATYPE_EFI_LFB) {
  61                        screen_info->orig_video_isVGA = VIDEO_TYPE_EFI;
  62                        break;
  63                }
  64
  65                if (size >= offsetof(struct dom0_vga_console_info,
  66                                     u.vesa_lfb.gbl_caps)
  67                    + sizeof(info->u.vesa_lfb.gbl_caps))
  68                        screen_info->capabilities = info->u.vesa_lfb.gbl_caps;
  69                if (size >= offsetof(struct dom0_vga_console_info,
  70                                     u.vesa_lfb.mode_attrs)
  71                    + sizeof(info->u.vesa_lfb.mode_attrs))
  72                        screen_info->vesa_attributes = info->u.vesa_lfb.mode_attrs;
  73                break;
  74        }
  75}
  76