arch/ia64/dig/setup.c

   1 /*
   2  * Platform dependent support for DIG64 platforms.
   3  *
   4  * Copyright (C) 1999 Intel Corp.
   5  * Copyright (C) 1999, 2001 Hewlett-Packard Co
   6  * Copyright (C) 1999, 2001, 2003 David Mosberger-Tang <davidm@hpl.hp.com>
   7  * Copyright (C) 1999 VA Linux Systems
   8  * Copyright (C) 1999 Walt Drummond <drummond@valinux.com>
   9  * Copyright (C) 1999 Vijay Chander <vijay@engr.sgi.com>
  10  */
  11
  12 #include <linux/init.h>
  13 #include <linux/delay.h>
  14 #include <linux/kernel.h>
  15 #include <linux/kdev_t.h>
  16 #include <linux/string.h>
  17 #include <linux/screen_info.h>
  18 #include <linux/console.h>
  19 #include <linux/timex.h>
  20 #include <linux/sched.h>
  21 #include <linux/root_dev.h>
  22
  23 #include <asm/io.h>
  24 #include <asm/machvec.h>
  25 #include <asm/system.h>
  26
  27 #include <xen/xencons.h>
  28
  29 void __init
  30 dig_setup (char **cmdline_p)
  31 {
  32         unsigned int orig_x, orig_y, num_cols, num_rows, font_height;
  33
  34         /*
  35          * Default to /dev/sda2.  This assumes that the EFI partition
  36          * is physical disk 1 partition 1 and the Linux root disk is
  37          * physical disk 1 partition 2.
  38          */
  39         ROOT_DEV = Root_SDA2;           /* default to second partition on first drive */
  40
  41 #ifdef CONFIG_SMP
  42         init_smp_config();
  43 #endif
  44
  45         memset(&screen_info, 0, sizeof(screen_info));
  46
  47         if (!ia64_boot_param->console_info.num_rows
  48             || !ia64_boot_param->console_info.num_cols)
  49         {
  50                 printk(KERN_WARNING "dig_setup: warning: invalid screen-info, guessing 80x25\n");
  51                 orig_x = 0;
  52                 orig_y = 0;
  53                 num_cols = 80;
  54                 num_rows = 25;
  55                 font_height = 16;
  56         } else {
  57                 orig_x = ia64_boot_param->console_info.orig_x;
  58                 orig_y = ia64_boot_param->console_info.orig_y;
  59                 num_cols = ia64_boot_param->console_info.num_cols;
  60                 num_rows = ia64_boot_param->console_info.num_rows;
  61                 font_height = 400 / num_rows;
  62         }
  63
  64         screen_info.orig_x = orig_x;
  65         screen_info.orig_y = orig_y;
  66         screen_info.orig_video_cols  = num_cols;
  67         screen_info.orig_video_lines = num_rows;
  68         screen_info.orig_video_points = font_height;
  69         screen_info.orig_video_mode = 3;        /* XXX fake */
  70         screen_info.orig_video_isVGA = 1;       /* XXX fake */
  71         screen_info.orig_video_ega_bx = 3;      /* XXX fake */
  72 #ifdef CONFIG_XEN
  73         if (!is_running_on_xen() || !is_initial_xendomain())
  74                 return;
  75
  76         if (xen_start_info->console.dom0.info_size >=
  77             sizeof(struct dom0_vga_console_info)) {
  78                 const struct dom0_vga_console_info *info =
  79                         (struct dom0_vga_console_info *)(
  80                                 (char *)xen_start_info +
  81                                 xen_start_info->console.dom0.info_off);
  82                 dom0_init_screen_info(info);
  83         }
  84         xen_start_info->console.domU.mfn = 0;
  85         xen_start_info->console.domU.evtchn = 0;
  86 #endif
  87 }