arch/common/boot/grub2/kern/efi/init.c

   1 /* init.c - generic EFI initialization and finalization */
   2 /*
   3  *  GRUB  --  GRand Unified Bootloader
   4  *  Copyright (C) 2006,2007  Free Software Foundation, Inc.
   5  *
   6  *  GRUB is free software: you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation, either version 3 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  GRUB is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <grub/efi/efi.h>
  21 #include <grub/efi/console.h>
  22 #include <grub/efi/disk.h>
  23 #include <grub/term.h>
  24 #include <grub/misc.h>
  25 #include <grub/env.h>
  26 #include <grub/mm.h>
  27 #include <grub/machine/kernel.h>
  28
  29 void
  30 grub_efi_init (void)
  31 {
  32   /* First of all, initialize the console so that GRUB can display
  33      messages.  */
  34   grub_console_init ();
  35
  36   /* Initialize the memory management system.  */
  37   grub_efi_mm_init ();
  38
  39   grub_efidisk_init ();
  40 }
  41
  42 void
  43 grub_efi_set_prefix (void)
  44 {
  45   grub_efi_loaded_image_t *image;
  46
  47   image = grub_efi_get_loaded_image (grub_efi_image_handle);
  48   if (image)
  49     {
  50       char *device;
  51       char *file;
  52
  53       device = grub_efidisk_get_device_name (image->device_handle);
  54       file = grub_efi_get_filename (image->file_path);
  55
  56       if (device && file)
  57         {
  58           char *p;
  59           char *prefix;
  60
  61           /* Get the directory.  */
  62           p = grub_strrchr (file, '/');
  63           if (p)
  64             *p = '\0';
  65
  66           prefix = grub_malloc (1 + grub_strlen (device) + 1
  67                                 + grub_strlen (file) + 1);
  68           if (prefix)
  69             {
  70               grub_sprintf (prefix, "(%s)%s", device, file);
  71               grub_env_set ("prefix", prefix);
  72               grub_free (prefix);
  73             }
  74         }
  75
  76       grub_free (device);
  77       grub_free (file);
  78     }
  79 }
  80
  81 void
  82 grub_efi_fini (void)
  83 {
  84   grub_efidisk_fini ();
  85   grub_efi_mm_fini ();
  86   grub_console_fini ();
  87 }