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https://github.com/smaeul/u-boot.git
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05c4c9e21a
A following patch is cleaning up the core EFI code trying to remove sequences of efi_create_handle, efi_add_protocol. Although this works fine there's a problem with the latter since it is usually combined with efi_delete_handle() which blindly removes all protocols on a handle and deletes the handle. We should try to adhere to the EFI spec which only deletes a handle if the last instance of a protocol has been removed. Another problem is that efi_delete_handle() never checks for opened protocols, but the EFI spec defines that the caller is responsible for ensuring that there are no references to a protocol interface that is going to be removed. So let's fix this by replacing all callsites of efi_create_handle(), efi_add_protocol() , efi_delete_handle() with Install/UninstallMultipleProtocol. In order to do that redefine functions that can be used by the U-Boot proper internally and add '_ext' variants that will be used from the EFI API Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org> Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
87 lines
2.2 KiB
C
87 lines
2.2 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_dt_fixup.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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efi_handle_t efi_root = NULL;
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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_status_t ret;
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struct efi_root_dp *dp;
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/* Create 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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/* Create root node and install protocols */
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ret = efi_install_multiple_protocol_interfaces
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(&efi_root,
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/* Device path protocol */
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&efi_guid_device_path, dp,
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#if CONFIG_IS_ENABLED(EFI_DEVICE_PATH_TO_TEXT)
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/* Device path to text protocol */
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&efi_guid_device_path_to_text_protocol,
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&efi_device_path_to_text,
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#endif
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#if CONFIG_IS_ENABLED(EFI_DEVICE_PATH_UTIL)
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/* Device path utilities protocol */
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&efi_guid_device_path_utilities_protocol,
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&efi_device_path_utilities,
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#endif
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#if CONFIG_IS_ENABLED(EFI_DT_FIXUP)
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/* Device-tree fix-up protocol */
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&efi_guid_dt_fixup_protocol,
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&efi_dt_fixup_prot,
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#endif
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#if CONFIG_IS_ENABLED(EFI_UNICODE_COLLATION_PROTOCOL2)
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&efi_guid_unicode_collation_protocol2,
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&efi_unicode_collation_protocol2,
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#endif
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#if CONFIG_IS_ENABLED(EFI_LOADER_HII)
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/* HII string protocol */
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&efi_guid_hii_string_protocol,
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&efi_hii_string,
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/* HII database protocol */
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&efi_guid_hii_database_protocol,
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&efi_hii_database,
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#endif
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NULL);
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efi_root->type = EFI_OBJECT_TYPE_U_BOOT_FIRMWARE;
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return ret;
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}
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