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efi_loader: create root node

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Currently we assign a lot of protocols to loaded images though
these protocols are not related to them. Instead they should be
installed on a separate handle. Via the device path it is the
parent to the devices like the network adapter.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Heinrich Schuchardt
2018-09-20 21:58:23 +02:00
committed by Alexander Graf
parent 506dc52d5d
commit 4e6b5d6503
6 changed files with 94 additions and 22 deletions
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79
lib/efi_loader/efi_root_node.c Normal file
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// SPDX-License-Identifier: GPL-2.0+
/*
* Root node for system services
*
* Copyright (c) 2018 Heinrich Schuchardt
*/
#include <common.h>
#include <malloc.h>
#include <efi_loader.h>
const efi_guid_t efi_u_boot_guid = U_BOOT_GUID;
struct efi_root_dp {
struct efi_device_path_vendor vendor;
struct efi_device_path end;
} __packed;
/**
* efi_root_node_register() - create root node
*
* Create the root node on which we install all protocols that are
* not related to a loaded image or a driver.
*
* Return: status code
*/
efi_status_t efi_root_node_register(void)
{
efi_handle_t root;
efi_status_t ret;
struct efi_root_dp *dp;
/* Create handle */
ret = efi_create_handle(&root);
if (ret != EFI_SUCCESS)
return ret;
/* Install device path protocol */
dp = calloc(1, sizeof(*dp));
if (!dp)
return EFI_OUT_OF_RESOURCES;
/* Fill vendor node */
dp->vendor.dp.type = DEVICE_PATH_TYPE_HARDWARE_DEVICE;
dp->vendor.dp.sub_type = DEVICE_PATH_SUB_TYPE_VENDOR;
dp->vendor.dp.length = sizeof(struct efi_device_path_vendor);
dp->vendor.guid = efi_u_boot_guid;
/* Fill end node */
dp->end.type = DEVICE_PATH_TYPE_END;
dp->end.sub_type = DEVICE_PATH_SUB_TYPE_END;
dp->end.length = sizeof(struct efi_device_path);
/* Install device path protocol */
ret = efi_add_protocol(root, &efi_guid_device_path, dp);
if (ret != EFI_SUCCESS)
goto failure;
/* Install device path to text protocol */
ret = efi_add_protocol(root, &efi_guid_device_path_to_text_protocol,
(void *)&efi_device_path_to_text);
if (ret != EFI_SUCCESS)
goto failure;
/* Install device path utilities protocol */
ret = efi_add_protocol(root, &efi_guid_device_path_utilities_protocol,
(void *)&efi_device_path_utilities);
if (ret != EFI_SUCCESS)
goto failure;
/* Install Unicode collation protocol */
ret = efi_add_protocol(root, &efi_guid_unicode_collation_protocol,
(void *)&efi_unicode_collation_protocol);
if (ret != EFI_SUCCESS)
goto failure;
failure:
return ret;
}