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