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/*
* EFI device path interface
*
* Copyright (c) 2017 Heinrich Schuchardt
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <efi_loader.h>
#define MEDIA_DEVICE_PATH 4
#define FILE_PATH_MEDIA_DEVICE_PATH 4
const efi_guid_t efi_guid_device_path_to_text_protocol =
EFI_DEVICE_PATH_TO_TEXT_PROTOCOL_GUID;
uint16_t *efi_convert_device_node_to_text(
struct efi_device_path_protocol *device_node,
bool display_only,
bool allow_shortcuts)
{
EFI_ENTRY("%p, %d, %d", device_node, display_only, allow_shortcuts);
EFI_EXIT(EFI_UNSUPPORTED);
return NULL;
}
uint16_t *efi_convert_device_path_to_text(
struct efi_device_path_protocol *device_path,
bool display_only,
bool allow_shortcuts)
{
EFI_ENTRY("%p, %d, %d", device_path, display_only, allow_shortcuts);
unsigned long buffer_size;
efi_status_t r;
uint16_t *buffer = NULL;
switch (device_path->type) {
case MEDIA_DEVICE_PATH:
switch (device_path->sub_type) {
case FILE_PATH_MEDIA_DEVICE_PATH:
buffer_size = device_path->length - 4;
r = efi_allocate_pool(EFI_ALLOCATE_ANY_PAGES,
buffer_size, (void **) &buffer);
if (r == EFI_SUCCESS)
memcpy(buffer, device_path->data, buffer_size);
break;
}
}
if (buffer) {
EFI_EXIT(EFI_SUCCESS);
} else {
debug("type %d, subtype %d\n",
device_path->type, device_path->sub_type);
EFI_EXIT(EFI_UNSUPPORTED);
}
return buffer;
}
const struct efi_device_path_to_text_protocol efi_device_path_to_text = {
.convert_device_node_to_text = efi_convert_device_node_to_text,
.convert_device_path_to_text = efi_convert_device_path_to_text,
};
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