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 * $FreeBSD: head/lib/libefivar/efivar.h 343755 2019-02-04 21:28:25Z imp $ 26 */ 27 28 #ifndef _EFIVAR_H_ 29 #define _EFIVAR_H_ 30 31 #include <uuid.h> 32 #include <sys/efi.h> 33 #include <sys/endian.h> 34 #include <stdint.h> 35 36 /* Shoud these be elsewhere ? */ 37 #define EFI_VARIABLE_NON_VOLATILE 0x00000001 38 #define EFI_VARIABLE_BOOTSERVICE_ACCESS 0x00000002 39 #define EFI_VARIABLE_RUNTIME_ACCESS 0x00000004 40 #define EFI_VARIABLE_HARDWARE_ERROR_RECORD 0x00000008 41 #define EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS 0x00000010 42 #define EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS \ 43 0x00000020 44 #define EFI_VARIABLE_APPEND_WRITE 0x00000040 45 #if 0 /* todo */ 46 #define EFI_VARIABLE_HAS_AUTH_HEADER 47 #define EFI_VARIABLE_HAS_SIGNATURE 48 #endif 49 50 51 #ifndef _EFIVAR_EFI_GUID_T_DEF 52 #define _EFIVAR_EFI_GUID_T_DEF 53 typedef uuid_t efi_guid_t; 54 #endif 55 56 #if BYTE_ORDER == LITTLE_ENDIAN 57 #define EFI_GUID(a, b, c, d, e0, e1, e2, e3, e4, e5) \ 58 ((efi_guid_t) {(a), (b), (c), (d) >> 8, (d) & 0xff, \ 59 { (e0), (e1), (e2), (e3), (e4), (e5) }}) 60 #else 61 #define EFI_GUID(a, b, c, d, e0, e1, e2, e3, e4, e5) \ 62 ((efi_guid_t) {(a), (b), (c), (d) & 0xff, (d) >> 8, \ 63 { (e0), (e1), (e2), (e3), (e4), (e5) }}) 64 #endif 65 66 #define EFI_GLOBAL_GUID EFI_GUID(0x8be4df61, 0x93ca, 0x11d2, 0xaa0d, \ 67 0x00, 0xe0, 0x98, 0x03, 0x2b, 0x8c) 68 69 int efi_append_variable(efi_guid_t guid, const char *name, 70 uint8_t *data, size_t data_size, uint32_t attributes); 71 int efi_del_variable(efi_guid_t guid, const char *name); 72 int efi_get_variable(efi_guid_t guid, const char *name, 73 uint8_t **data, size_t *data_size, uint32_t *attributes); 74 int efi_get_variable_attributes(efi_guid_t guid, const char *name, 75 uint32_t *attributes); 76 int efi_get_variable_size(efi_guid_t guid, const char *name, size_t *size); 77 int efi_get_next_variable_name(efi_guid_t **guid, char **name); 78 int efi_guid_cmp(const efi_guid_t *guid1, const efi_guid_t *guid2); 79 int efi_guid_is_zero(const efi_guid_t *guid1); 80 int efi_guid_to_name(efi_guid_t *guid, char **name); 81 int efi_guid_to_symbol(efi_guid_t *guid, char **symbol); 82 int efi_guid_to_str(const efi_guid_t *guid, char **sp); 83 int efi_name_to_guid(const char *name, efi_guid_t *guid); 84 int efi_set_variable(efi_guid_t guid, const char *name, 85 uint8_t *data, size_t data_size, uint32_t attributes); 86 int efi_str_to_guid(const char *s, efi_guid_t *guid); 87 int efi_variables_supported(void); 88 89 /* FreeBSD extensions */ 90 struct uuid_table 91 { 92 const char *uuid_str; 93 const char *name; 94 efi_guid_t guid; 95 }; 96 97 int efi_known_guid(struct uuid_table **); 98 99 extern const efi_guid_t efi_guid_empty; 100 101 #endif /* _EFIVAR_H_ */ 102