1/*- 2 * Copyright (c) 2016 Netflix, Inc. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23 * SUCH DAMAGE. 24 */ 25 26#ifndef _EFIVAR_H_ 27#define _EFIVAR_H_ 28 29#include <uuid.h> 30#include <sys/efi.h> 31#include <sys/endian.h> 32#include <stdint.h> 33 34/* Shoud these be elsewhere ? */ 35#define EFI_VARIABLE_NON_VOLATILE 0x00000001 36#define EFI_VARIABLE_BOOTSERVICE_ACCESS 0x00000002 37#define EFI_VARIABLE_RUNTIME_ACCESS 0x00000004 38#define EFI_VARIABLE_HARDWARE_ERROR_RECORD 0x00000008 39#define EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS 0x00000010 40#define EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS \ 41 0x00000020 42#define EFI_VARIABLE_APPEND_WRITE 0x00000040 43#if 0 /* todo */ 44#define EFI_VARIABLE_HAS_AUTH_HEADER 45#define EFI_VARIABLE_HAS_SIGNATURE 46#endif 47 48 49#ifndef _EFIVAR_EFI_GUID_T_DEF 50#define _EFIVAR_EFI_GUID_T_DEF 51typedef uuid_t efi_guid_t; 52#endif 53 54#if BYTE_ORDER == LITTLE_ENDIAN 55#define EFI_GUID(a, b, c, d, e0, e1, e2, e3, e4, e5) \ 56 ((efi_guid_t) {(a), (b), (c), (d) >> 8, (d) & 0xff, \ 57 { (e0), (e1), (e2), (e3), (e4), (e5) }}) 58#else 59#define EFI_GUID(a, b, c, d, e0, e1, e2, e3, e4, e5) \ 60 ((efi_guid_t) {(a), (b), (c), (d) & 0xff, (d) >> 8, \ 61 { (e0), (e1), (e2), (e3), (e4), (e5) }}) 62#endif 63 64#define EFI_GLOBAL_GUID EFI_GUID(0x8be4df61, 0x93ca, 0x11d2, 0xaa0d, \ 65 0x00, 0xe0, 0x98, 0x03, 0x2b, 0x8c) 66 67int efi_append_variable(efi_guid_t guid, const char *name, 68 uint8_t *data, size_t data_size, uint32_t attributes); 69int efi_del_variable(efi_guid_t guid, const char *name); 70int efi_get_variable(efi_guid_t guid, const char *name, 71 uint8_t **data, size_t *data_size, uint32_t *attributes); 72int efi_get_variable_attributes(efi_guid_t guid, const char *name, 73 uint32_t *attributes); 74int efi_get_variable_size(efi_guid_t guid, const char *name, size_t *size); 75int efi_get_next_variable_name(efi_guid_t **guid, char **name); 76int efi_guid_cmp(const efi_guid_t *guid1, const efi_guid_t *guid2); 77int efi_guid_is_zero(const efi_guid_t *guid1); 78int efi_guid_to_name(efi_guid_t *guid, char **name); 79int efi_guid_to_symbol(efi_guid_t *guid, char **symbol); 80int efi_guid_to_str(const efi_guid_t *guid, char **sp); 81int efi_name_to_guid(const char *name, efi_guid_t *guid); 82int efi_set_variable(efi_guid_t guid, const char *name, 83 uint8_t *data, size_t data_size, uint32_t attributes); 84int efi_str_to_guid(const char *s, efi_guid_t *guid); 85int efi_variables_supported(void); 86 87/* FreeBSD extensions */ 88struct uuid_table 89{ 90 const char *uuid_str; 91 const char *name; 92 efi_guid_t guid; 93}; 94 95int efi_known_guid(struct uuid_table **); 96 97extern const efi_guid_t efi_guid_empty; 98 99#endif /* _EFIVAR_H_ */ 100