vga.c (2771B)
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}