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4e6b5d6503
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>
80 lines
2.0 KiB
C
80 lines
2.0 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Root node for system services
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*
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* Copyright (c) 2018 Heinrich Schuchardt
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*/
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#include <common.h>
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#include <malloc.h>
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#include <efi_loader.h>
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const efi_guid_t efi_u_boot_guid = U_BOOT_GUID;
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struct efi_root_dp {
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struct efi_device_path_vendor vendor;
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struct efi_device_path end;
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} __packed;
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/**
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* efi_root_node_register() - create root node
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*
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* Create the root node on which we install all protocols that are
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* not related to a loaded image or a driver.
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*
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* Return: status code
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*/
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efi_status_t efi_root_node_register(void)
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{
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efi_handle_t root;
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efi_status_t ret;
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struct efi_root_dp *dp;
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/* Create handle */
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ret = efi_create_handle(&root);
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if (ret != EFI_SUCCESS)
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return ret;
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/* Install device path protocol */
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dp = calloc(1, sizeof(*dp));
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if (!dp)
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return EFI_OUT_OF_RESOURCES;
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/* Fill vendor node */
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dp->vendor.dp.type = DEVICE_PATH_TYPE_HARDWARE_DEVICE;
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dp->vendor.dp.sub_type = DEVICE_PATH_SUB_TYPE_VENDOR;
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dp->vendor.dp.length = sizeof(struct efi_device_path_vendor);
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dp->vendor.guid = efi_u_boot_guid;
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/* Fill end node */
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dp->end.type = DEVICE_PATH_TYPE_END;
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dp->end.sub_type = DEVICE_PATH_SUB_TYPE_END;
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dp->end.length = sizeof(struct efi_device_path);
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/* Install device path protocol */
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ret = efi_add_protocol(root, &efi_guid_device_path, dp);
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if (ret != EFI_SUCCESS)
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goto failure;
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/* Install device path to text protocol */
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ret = efi_add_protocol(root, &efi_guid_device_path_to_text_protocol,
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(void *)&efi_device_path_to_text);
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if (ret != EFI_SUCCESS)
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goto failure;
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/* Install device path utilities protocol */
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ret = efi_add_protocol(root, &efi_guid_device_path_utilities_protocol,
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(void *)&efi_device_path_utilities);
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if (ret != EFI_SUCCESS)
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goto failure;
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/* Install Unicode collation protocol */
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ret = efi_add_protocol(root, &efi_guid_unicode_collation_protocol,
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(void *)&efi_unicode_collation_protocol);
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if (ret != EFI_SUCCESS)
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goto failure;
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failure:
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return ret;
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}
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