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

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