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 xen_init_vga(const struct dom0_vga_console_info * info,size_t size,struct screen_info * screen_info)12void __init xen_init_vga(const struct dom0_vga_console_info *info, size_t size, 13 struct screen_info *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 (size >= offsetof(struct dom0_vga_console_info, 60 u.vesa_lfb.ext_lfb_base) 61 + sizeof(info->u.vesa_lfb.ext_lfb_base) 62 && info->u.vesa_lfb.ext_lfb_base) { 63 screen_info->ext_lfb_base = info->u.vesa_lfb.ext_lfb_base; 64 screen_info->capabilities |= VIDEO_CAPABILITY_64BIT_BASE; 65 } 66 67 if (info->video_type == XEN_VGATYPE_EFI_LFB) { 68 screen_info->orig_video_isVGA = VIDEO_TYPE_EFI; 69 break; 70 } 71 72 if (size >= offsetof(struct dom0_vga_console_info, 73 u.vesa_lfb.mode_attrs) 74 + sizeof(info->u.vesa_lfb.mode_attrs)) 75 screen_info->vesa_attributes = info->u.vesa_lfb.mode_attrs; 76 break; 77 } 78 } 79