blob: 0cd9a7e9c7682249bf3b0d5ca135877e8a7324e6 [file] [log] [blame]
Simon Glass16c220d2015-08-04 12:33:58 -06001/*
2 * Copyright (c) 2015 Google, Inc
3 *
4 * SPDX-License-Identifier: GPL-2.0+
5 *
6 * Access to the EFI information table
7 */
8
9#include <common.h>
10#include <efi.h>
11#include <errno.h>
12#include <mapmem.h>
13
14int efi_info_get(enum efi_entry_t type, void **datap, int *sizep)
15{
16 struct efi_entry_hdr *entry;
17 struct efi_info_hdr *info;
18 int ret;
19
20 if (!gd->arch.table)
21 return -ENODATA;
22
23 info = map_sysmem(gd->arch.table, 0);
24 if (info->version != EFI_TABLE_VERSION) {
25 ret = -EPROTONOSUPPORT;
26 goto err;
27 }
28
29 entry = (struct efi_entry_hdr *)((ulong)info + info->hdr_size);
30 while (entry->type != EFIET_END) {
31 if (entry->type == type) {
32 if (entry->addr)
33 *datap = map_sysmem(entry->addr, entry->size);
34 else
35 *datap = entry + 1;
36 *sizep = entry->size;
37 return 0;
38 }
39 entry = (struct efi_entry_hdr *)((ulong)entry + entry->link);
40 }
41
42 ret = -ENOENT;
43err:
44 unmap_sysmem(info);
45
46 return ret;
47}