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https://github.com/brain-hackers/u-boot-brain
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![Rob Clark](/assets/img/avatar_default.png)
Signed-off-by: Rob Clark <robdclark@gmail.com> Signed-off-by: Alexander Graf <agraf@suse.de>
131 lines
3.2 KiB
C
131 lines
3.2 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 MAC_OUTPUT_LEN 22
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#define UNKNOWN_OUTPUT_LEN 23
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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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static 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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unsigned long buffer_size;
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efi_status_t r;
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uint16_t *buffer = NULL;
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int i;
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switch (device_node->type) {
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case DEVICE_PATH_TYPE_END:
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return NULL;
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case DEVICE_PATH_TYPE_MESSAGING_DEVICE:
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switch (device_node->sub_type) {
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case DEVICE_PATH_SUB_TYPE_MSG_MAC_ADDR: {
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struct efi_device_path_mac_addr *dp =
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(struct efi_device_path_mac_addr *)device_node;
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if (dp->if_type != 0 && dp->if_type != 1)
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break;
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r = efi_allocate_pool(EFI_ALLOCATE_ANY_PAGES,
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2 * MAC_OUTPUT_LEN,
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(void **)&buffer);
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if (r != EFI_SUCCESS)
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return NULL;
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sprintf((char *)buffer,
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"MAC(%02x%02x%02x%02x%02x%02x,0x%1x)",
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dp->mac.addr[0], dp->mac.addr[1],
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dp->mac.addr[2], dp->mac.addr[3],
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dp->mac.addr[4], dp->mac.addr[5],
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dp->if_type);
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for (i = MAC_OUTPUT_LEN - 1; i >= 0; --i)
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buffer[i] = ((uint8_t *)buffer)[i];
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break;
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}
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}
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break;
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case DEVICE_PATH_TYPE_MEDIA_DEVICE:
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switch (device_node->sub_type) {
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case DEVICE_PATH_SUB_TYPE_FILE_PATH:
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buffer_size = device_node->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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return NULL;
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memcpy(buffer, device_node->data, buffer_size);
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break;
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}
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break;
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}
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/*
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* For all node types that we do not yet support return
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* 'UNKNOWN(type,subtype)'.
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*/
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if (!buffer) {
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r = efi_allocate_pool(EFI_ALLOCATE_ANY_PAGES,
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2 * UNKNOWN_OUTPUT_LEN,
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(void **)&buffer);
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if (r != EFI_SUCCESS)
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return NULL;
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sprintf((char *)buffer,
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"UNKNOWN(%04x,%04x)",
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device_node->type,
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device_node->sub_type);
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for (i = UNKNOWN_OUTPUT_LEN - 1; i >= 0; --i)
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buffer[i] = ((uint8_t *)buffer)[i];
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}
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return buffer;
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}
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static uint16_t EFIAPI *efi_convert_device_node_to_text_ext(
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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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uint16_t *buffer;
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EFI_ENTRY("%p, %d, %d", device_node, display_only, allow_shortcuts);
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buffer = efi_convert_device_node_to_text(device_node, display_only,
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allow_shortcuts);
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EFI_EXIT(EFI_SUCCESS);
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return buffer;
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}
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static uint16_t EFIAPI *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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uint16_t *buffer;
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EFI_ENTRY("%p, %d, %d", device_path, display_only, allow_shortcuts);
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/*
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* Our device paths are all of depth one. So its is sufficient to
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* to convert the first node.
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*/
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buffer = efi_convert_device_node_to_text(device_path, display_only,
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allow_shortcuts);
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EFI_EXIT(EFI_SUCCESS);
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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_ext,
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.convert_device_path_to_text = efi_convert_device_path_to_text,
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};
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