C++ (Cpp) grub_efi_get_device_pathの例

コード例 #1

ファイル: efidisk.c プロジェクト: jnbek/grub2-fedora

static struct grub_efidisk_data *
make_devices (void)
{
  grub_efi_uintn_t num_handles;
  grub_efi_handle_t *handles;
  grub_efi_handle_t *handle;
  struct grub_efidisk_data *devices = 0;

  /* Find handles which support the disk io interface.  */
  handles = grub_efi_locate_handle (GRUB_EFI_BY_PROTOCOL, &block_io_guid,
				    0, &num_handles);
  if (! handles)
    return 0;

  /* Make a linked list of devices.  */
  for (handle = handles; num_handles--; handle++)
    {
      grub_efi_device_path_t *dp;
      grub_efi_device_path_t *ldp;
      struct grub_efidisk_data *d;
      grub_efi_block_io_t *bio;

      dp = grub_efi_get_device_path (*handle);
      if (! dp)
	continue;

      ldp = find_last_device_path (dp);
      if (! ldp)
	/* This is empty. Why?  */
	continue;

      bio = grub_efi_open_protocol (*handle, &block_io_guid,
				    GRUB_EFI_OPEN_PROTOCOL_GET_PROTOCOL);
      if (! bio)
	/* This should not happen... Why?  */
	continue;

      d = grub_malloc (sizeof (*d));
      if (! d)
	{
	  /* Uggh.  */
	  grub_free (handles);
	  return 0;
	}

      d->handle = *handle;
      d->device_path = dp;
      d->last_device_path = ldp;
      d->block_io = bio;
      d->next = devices;
      devices = d;
    }

  grub_free (handles);

  return devices;
}

コード例 #2

ファイル: graphics.c プロジェクト: QuestOS/Support

static void
grub_efi_configure_pci(grub_efi_handle_t handle)
{
  grub_efi_device_path_t *path, *parent;
  grub_efi_handle_t parent_handle;
  grub_efi_pci_io_t *pci_proto;
  grub_efi_pci_root_io_t *pci_root_proto;
  grub_efi_status_t status;

  path = grub_efi_get_device_path(handle);
  parent = find_parent_device_path(path);

  if (!parent)
    return;

  status = grub_efi_locate_device_path (&device_path_guid, &parent,
					&parent_handle);
  if (status != GRUB_EFI_SUCCESS)
    return;

  pci_proto = grub_efi_open_protocol (parent_handle, &pci_io_guid,
				      GRUB_EFI_OPEN_PROTOCOL_GET_PROTOCOL);

  pci_root_proto = grub_efi_open_protocol (parent_handle, &pci_root_io_guid,
					   GRUB_EFI_OPEN_PROTOCOL_GET_PROTOCOL);


  if (pci_proto || pci_root_proto)
    {
      if (pci_proto)
	{
	  Call_Service_4 (pci_proto->attributes, pci_proto,
			  grub_efi_pci_io_attribute_operation_enable,
			  GRUB_EFI_PCI_IO_ATTRIBUTE_VGA_MEMORY |
			  GRUB_EFI_PCI_IO_ATTRIBUTE_VGA_IO |
			  GRUB_EFI_PCI_IO_ATTRIBUTE_VGA_PALETTE_IO, NULL);

	  grub_efi_configure_pci (parent_handle);
	}
      else
	{
	  grub_uint8_t value = 0x33;

	  Call_Service_5 (pci_root_proto->pci.write, pci_root_proto,
			  grub_efi_pci_io_width_uint8, 0x91, 1, &value);
	  Call_Service_5 (pci_root_proto->pci.write, pci_root_proto,
			  grub_efi_pci_io_width_uint8, 0x92, 1, &value);
	}
    }
  grub_free(parent);
}