1 /*- 2 * Copyright (c) 2016 Netflix, Inc. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD$ 27 */ 28 29 #ifndef _EFIVAR_H_ 30 #define _EFIVAR_H_ 31 32 #include <uuid.h> 33 #include <sys/efi.h> 34 #include <sys/endian.h> 35 #include <stdint.h> 36 37 /* Shoud these be elsewhere ? */ 38 #define EFI_VARIABLE_NON_VOLATILE 0x00000001 39 #define EFI_VARIABLE_BOOTSERVICE_ACCESS 0x00000002 40 #define EFI_VARIABLE_RUNTIME_ACCESS 0x00000004 41 #define EFI_VARIABLE_HARDWARE_ERROR_RECORD 0x00000008 42 #define EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS 0x00000010 43 #define EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS \ 44 0x00000020 45 #define EFI_VARIABLE_APPEND_WRITE 0x00000040 46 #if 0 /* todo */ 47 #define EFI_VARIABLE_HAS_AUTH_HEADER 48 #define EFI_VARIABLE_HAS_SIGNATURE 49 #endif 50 51 52 #ifndef _EFIVAR_EFI_GUID_T_DEF 53 #define _EFIVAR_EFI_GUID_T_DEF 54 typedef uuid_t efi_guid_t; 55 #endif 56 57 #if BYTE_ORDER == LITTLE_ENDIAN 58 #define EFI_GUID(a, b, c, d, e0, e1, e2, e3, e4, e5) \ 59 ((efi_guid_t) {(a), (b), (c), (d) >> 8, (d) & 0xff, \ 60 { (e0), (e1), (e2), (e3), (e4), (e5) }}) 61 #else 62 #define EFI_GUID(a, b, c, d, e0, e1, e2, e3, e4, e5) \ 63 ((efi_guid_t) {(a), (b), (c), (d) & 0xff, (d) >> 8, \ 64 { (e0), (e1), (e2), (e3), (e4), (e5) }}) 65 #endif 66 67 #define EFI_GLOBAL_GUID EFI_GUID(0x8be4df61, 0x93ca, 0x11d2, 0xaa0d, \ 68 0x00, 0xe0, 0x98, 0x03, 0x2b, 0x8c) 69 70 int efi_append_variable(efi_guid_t guid, const char *name, 71 uint8_t *data, size_t data_size, uint32_t attributes); 72 int efi_del_variable(efi_guid_t guid, const char *name); 73 int efi_get_variable(efi_guid_t guid, const char *name, 74 uint8_t **data, size_t *data_size, uint32_t *attributes); 75 int efi_get_variable_attributes(efi_guid_t guid, const char *name, 76 uint32_t *attributes); 77 int efi_get_variable_size(efi_guid_t guid, const char *name, size_t *size); 78 int efi_get_next_variable_name(efi_guid_t **guid, char **name); 79 int efi_guid_cmp(const efi_guid_t *guid1, const efi_guid_t *guid2); 80 int efi_guid_is_zero(const efi_guid_t *guid1); 81 int efi_guid_to_name(efi_guid_t *guid, char **name); 82 int efi_guid_to_symbol(efi_guid_t *guid, char **symbol); 83 int efi_guid_to_str(const efi_guid_t *guid, char **sp); 84 int efi_name_to_guid(const char *name, efi_guid_t *guid); 85 int efi_set_variable(efi_guid_t guid, const char *name, 86 uint8_t *data, size_t data_size, uint32_t attributes); 87 int efi_str_to_guid(const char *s, efi_guid_t *guid); 88 int efi_variables_supported(void); 89 90 /* FreeBSD extensions */ 91 struct uuid_table 92 { 93 const char *uuid_str; 94 const char *name; 95 efi_guid_t guid; 96 }; 97 98 int efi_known_guid(struct uuid_table **); 99 100 extern const efi_guid_t efi_guid_empty; 101 102 #endif /* _EFIVAR_H_ */ 103