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https://github.com/AsahiLinux/u-boot
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cc5b70812f
ConvertPathToText is implemented for * type 4 - media device path * subtype 4 - file path This is the kind of device path we hand out for block devices. All other cases may be implemented later. Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de> [agraf: fix whitespace] Signed-off-by: Alexander Graf <agraf@suse.de>
67 lines
1.6 KiB
C
67 lines
1.6 KiB
C
/*
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* EFI device path interface
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*
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* Copyright (c) 2017 Heinrich Schuchardt
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <efi_loader.h>
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#define MEDIA_DEVICE_PATH 4
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#define FILE_PATH_MEDIA_DEVICE_PATH 4
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const efi_guid_t efi_guid_device_path_to_text_protocol =
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EFI_DEVICE_PATH_TO_TEXT_PROTOCOL_GUID;
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uint16_t *efi_convert_device_node_to_text(
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struct efi_device_path_protocol *device_node,
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bool display_only,
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bool allow_shortcuts)
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{
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EFI_ENTRY("%p, %d, %d", device_node, display_only, allow_shortcuts);
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EFI_EXIT(EFI_UNSUPPORTED);
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return NULL;
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}
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uint16_t *efi_convert_device_path_to_text(
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struct efi_device_path_protocol *device_path,
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bool display_only,
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bool allow_shortcuts)
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{
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EFI_ENTRY("%p, %d, %d", device_path, display_only, allow_shortcuts);
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unsigned long buffer_size;
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efi_status_t r;
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uint16_t *buffer = NULL;
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switch (device_path->type) {
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case MEDIA_DEVICE_PATH:
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switch (device_path->sub_type) {
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case FILE_PATH_MEDIA_DEVICE_PATH:
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buffer_size = device_path->length - 4;
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r = efi_allocate_pool(EFI_ALLOCATE_ANY_PAGES,
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buffer_size, (void **) &buffer);
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if (r == EFI_SUCCESS)
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memcpy(buffer, device_path->data, buffer_size);
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break;
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}
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}
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if (buffer) {
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EFI_EXIT(EFI_SUCCESS);
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} else {
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debug("type %d, subtype %d\n",
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device_path->type, device_path->sub_type);
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EFI_EXIT(EFI_UNSUPPORTED);
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}
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return buffer;
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}
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const struct efi_device_path_to_text_protocol efi_device_path_to_text = {
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.convert_device_node_to_text = efi_convert_device_node_to_text,
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.convert_device_path_to_text = efi_convert_device_path_to_text,
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};
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