kern/efi/init.c

/* init.c - generic EFI initialization and finalization */
/*
 *  GRUB  --  GRand Unified Bootloader
 *  Copyright (C) 2006,2007  Free Software Foundation, Inc.
 *  Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
 *
 *  GRUB is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  GRUB is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <grub/efi/efi.h>
#include <grub/efi/console.h>
#include <grub/efi/disk.h>
#include <grub/term.h>
#include <grub/misc.h>
#include <grub/env.h>
#include <grub/mm.h>
#include <grub/kernel.h>

/* Pointers to other useful tables */
void *grub_efi_smbios_ptr;

static void
grub_efi_table_init(void)
{
  grub_efi_guid_t smbios_guid = GRUB_EFI_SMBIOS_TABLE_GUID;
  grub_efi_uintn_t i;

  if (grub_efi_system_table == 0) {
     grub_dprintf("efi", "UEFI system pointer is NULL\n");
     return;
  }

  for (i = 0; i < grub_efi_system_table->num_table_entries; i++)
     {
       grub_efi_configuration_table_t *cfgtblp;
       cfgtblp = &grub_efi_system_table->configuration_table[i];

       if (grub_memcmp (&smbios_guid, &cfgtblp->vendor_guid,
            sizeof (grub_efi_guid_t)) == 0)
          {
             grub_efi_smbios_ptr = cfgtblp->vendor_table;
          }
     }
}

grub_addr_t grub_modbase;

void
grub_efi_init (void)
{
  grub_modbase = grub_efi_modules_addr ();
  /* First of all, initialize the console so that GRUB can display
     messages.  */
  grub_console_init ();

  /* Initialize the memory management system.  */
  grub_efi_mm_init ();

  efi_call_4 (grub_efi_system_table->boot_services->set_watchdog_timer,
          0, 0, 0, NULL);

  grub_efidisk_init ();

  grub_efi_table_init ();
}

void (*grub_efi_net_config) (grub_efi_handle_t hnd,
                 char **device,
                 char **path);

void
grub_machine_get_bootlocation (char **device, char **path)
{
  grub_efi_loaded_image_t *image = NULL;
  char *p;

  image = grub_efi_get_loaded_image (grub_efi_image_handle);
  if (!image)
    return;
  *device = grub_efidisk_get_device_name (image->device_handle);
  *path = grub_efi_get_filename (image->file_path);
  if (!*device && grub_efi_net_config)
    grub_efi_net_config (image->device_handle, device, path);

  /* Get the directory.  */
  p = grub_strrchr (*path, '/');
  if (p)
    *p = '\0';
}

void
grub_efi_fini (void)
{
  grub_efidisk_fini ();
  grub_console_fini ();
}