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 * in this position and unchanged. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 * 26 * $FreeBSD: head/lib/libefivar/efivar.h 307071 2016-10-11 22:30:41Z imp $ 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 typedef uuid_t efi_guid_t; 53 #if BYTE_ORDER == LITTLE_ENDIAN 54 #define EFI_GUID(a, b, c, d, e0, e1, e2, e3, e4, e5) \ 55 ((efi_guid_t) {(a), (b), (c), (d) >> 8, (d) & 0xff, \ 56 { (e0), (e1), (e2), (e3), (e4), (e5) }}) 57 #else 58 #define EFI_GUID(a, b, c, d, e0, e1, e2, e3, e4, e5) \ 59 ((efi_guid_t) {(a), (b), (c), (d) & 0xff, (d) >> 8, \ 60 { (e0), (e1), (e2), (e3), (e4), (e5) }}) 61 #endif 62 63 #define EFI_GLOBAL_GUID EFI_GUID(0x8be4df61, 0x93ca, 0x11d2, 0xaa0d, \ 64 0x00, 0xe0, 0x98, 0x03, 0x2b, 0x8c) 65 66 int efi_append_variable(efi_guid_t guid, const char *name, 67 uint8_t *data, size_t data_size, uint32_t attributes); 68 int efi_del_variable(efi_guid_t guid, const char *name); 69 int efi_get_variable(efi_guid_t guid, const char *name, 70 uint8_t **data, size_t *data_size, uint32_t *attributes); 71 int efi_get_variable_attributes(efi_guid_t guid, const char *name, 72 uint32_t *attributes); 73 int efi_get_variable_size(efi_guid_t guid, const char *name, size_t *size); 74 int efi_get_next_variable_name(efi_guid_t **guid, char **name); 75 int efi_guid_cmp(const efi_guid_t *guid1, const efi_guid_t *guid2); 76 int efi_guid_is_zero(const efi_guid_t *guid1); 77 int efi_guid_to_name(efi_guid_t *guid, char **name); 78 int efi_guid_to_symbol(efi_guid_t *guid, char **symbol); 79 int efi_guid_to_str(const efi_guid_t *guid, char **sp); 80 int efi_name_to_guid(const char *name, efi_guid_t *guid); 81 int efi_set_variable(efi_guid_t guid, const char *name, 82 uint8_t *data, size_t data_size, uint32_t attributes, mode_t mode); 83 int efi_str_to_guid(const char *s, efi_guid_t *guid); 84 int efi_variables_supported(void); 85 86 extern const efi_guid_t efi_guid_empty; 87 88 /* Stubs that are expected, but aren't really used */ 89 static inline int 90 efi_error_get(unsigned int n __unused, char ** const fn __unused, 91 char ** const func __unused, int *line __unused, 92 char ** const msg __unused, int *err __unused) 93 { 94 return 0; 95 } 96 97 static inline int 98 efi_error_set(const char *fn __unused, const char *func __unused, 99 int line __unused, int err __unused, const char *fmt __unused, ...) 100 { 101 return 0; 102 } 103 104 static inline void 105 efi_error_clear(void) 106 { 107 } 108 109 static inline int 110 efi_error(const char *fmt __unused, ...) 111 { 112 return 0; 113 } 114 115 static inline int 116 efi_error_val(int val __unused, const char *fmt __unused, ...) 117 { 118 return 0; 119 } 120 121 #endif /* _EFIVAR_H_ */ 122