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1/* =============================================================================
2 * uefi.h — minimal UEFI types and protocols for the RNG bootloader
3 *
4 * Standalone, freestanding, no external headers.
5 * ============================================================================= */
6
7#ifndef UEFI_H
8#define UEFI_H
9
10/* ---- basic types ---- */
11typedef unsigned char u8;
12typedef unsigned short u16;
13typedef unsigned int u32;
14typedef unsigned long long u64;
15/* UEFI CHAR16 — wchar_t must be 16-bit (use -fshort-wchar).
16 * GCC by default makes wchar_t = int (32-bit). -fshort-wchar makes
17 * it unsigned short (16-bit) to match UEFI's CHAR16.
18 * We don't include <stddef.h> (freestanding), so define our own. */
19typedef __CHAR16_TYPE__ char16;
20typedef signed short int16;
21typedef long long int64;
22typedef void *handle;
23
24/* ---- EFI status codes ---- */
25#define EFI_SUCCESS 0
26#define EFI_LOAD_ERROR ((u64)1)
27#define EFI_INVALID_PARAMETER ((u64)2)
28#define EFI_UNSUPPORTED ((u64)3)
29#define EFI_NOT_FOUND ((u64)14)
30#define EFI_ALREADY_STARTED ((u64)25)
31#define EFI_OUT_OF_RESOURCES ((u64)9)
32
33/* ---- GUIDs (128-bit) ---- */
34typedef struct { u32 a; u16 b; u16 c; u8 d[8]; } efi_guid;
35
36/* ---- EFI time (unused, part of file info struct) ---- */
37typedef struct {
38 u16 year; u8 month; u8 day;
39 u8 hour; u8 minute; u8 second; u8 pad1;
40 u32 ns; int16 tz; u8 daylight;
41} efi_time;
42
43/* ---- table headers ---- */
44typedef struct {
45 u64 signature;
46 u32 revision;
47 u32 header_size;
48 u32 crc32;
49 u32 reserved;
50} efi_table_header;
51
52/* ---- system table ---- */
53typedef struct efi_config_table efi_config_table;
54typedef struct efi_simple_text_output efi_simple_text_output;
55typedef struct efi_simple_text_input efi_simple_text_input;
56typedef struct efi_boot_services efi_boot_services;
57typedef struct efi_runtime_services efi_runtime_services;
58
59typedef struct {
60 efi_table_header hdr;
61 char16 *firmware_vendor;
62 u32 firmware_revision;
63 handle console_in_handle;
64 efi_simple_text_input *con_in;
65 handle console_out_handle;
66 efi_simple_text_output *con_out;
67 handle stderr_handle;
68 efi_simple_text_output *std_err;
69 efi_runtime_services *runtime_services;
70 efi_boot_services *boot_services;
71 u64 number_of_table_entries;
72 efi_config_table *configuration_table;
73} efi_system_table;
74
75/* ---- EFI input key ---- */
76typedef struct {
77 u16 scan_code;
78 char16 unicode_char;
79} efi_input_key;
80
81/* ---- simple text output (console) ---- */
82typedef u64 (*efi_text_reset)(efi_simple_text_output *, u8);
83typedef u64 (*efi_text_output)(efi_simple_text_output *, const char16 *);
84
85struct efi_simple_text_output {
86 void *unused; // Index 0: Reset
87 efi_text_output output_string; // Index 1: OutputString
88 void *unused2[8]; // Index 2-9: TestString..Mode
89};
90
91/* ---- simple text input (keyboard) ---- */
92typedef u64 (*efi_input_reset)(efi_simple_text_input *, u8);
93typedef u64 (*efi_input_read_key)(efi_simple_text_input *, efi_input_key *);
94
95struct efi_simple_text_input {
96 efi_input_reset reset; /* Index 0: Reset */
97 efi_input_read_key read_key_stroke; /* Index 1: ReadKeyStroke */
98 handle wait_for_key; /* Index 2: WaitForKey event */
99};
100
101/* ---- boot services ---- */
102typedef u64 (*efi_exit_boot_services)(handle, u64);
103typedef u64 (*efi_get_memory_map)(void*, void*, void*, void*, void*);
104typedef u64 (*efi_locate_protocol)(const efi_guid *, void *, void **);
105typedef u64 (*efi_load_image)(u8, handle, void *, void *, u64, handle *);
106typedef u64 (*efi_start_image)(handle, void *, u64 *);
107typedef u64 (*efi_handle_protocol)(handle, const efi_guid *, void **);
108typedef u64 (*efi_open_volume)(void *, void **);
109typedef u64 (*efi_open_file)(void *, void **, char16 *, u64, u64);
110typedef u64 (*efi_read_file)(void *, u64 *, void *);
111typedef u64 (*efi_allocate_pool)(u8, u64, void **);
112
113/* Boot Services table matching UEFI spec v2.10 function order.
114 Each entry is one function pointer (8 bytes on x64). */
115struct efi_boot_services {
116 efi_table_header hdr; /* 0 */
117 void *raise_tpl; /* 24 index 0 */
118 void *restore_tpl; /* 32 index 1 */
119 void *allocate_pages; /* 40 index 2 */
120 void *free_pages; /* 48 index 3 */
121 efi_get_memory_map get_memory_map; /* 56 index 4 */
122 efi_allocate_pool allocate_pool; /* 64 index 5 */
123 void *free_pool; /* 72 index 6 */
124 void *create_event; /* 80 index 7 */
125 void *set_timer; /* 88 index 8 */
126 void *wait_for_event; /* 96 index 9 */
127 void *signal_event; /*104 index 10 */
128 void *close_event; /*112 index 11 */
129 void *check_event; /*120 index 12 */
130 void *install_protocol_interface; /*128 index 13 */
131 void *reinstall_protocol_interface;/*136 index 14 */
132 void *uninstall_protocol_interface;/*144 index 15 */
133 efi_handle_protocol handle_protocol; /*152 index 16 */
134 void *reserved; /*160 index 17 */
135 void *register_protocol_notify; /*168 index 18 */
136 void *locate_handle; /*176 index 19 */
137 void *locate_device_path; /*184 index 20 */
138 void *install_config_table; /*192 index 21 */
139 efi_load_image load_image; /*200 index 22 */
140 efi_start_image start_image; /*208 index 23 */
141 void *exit; /*216 index 24 */
142 void *unload_image; /*224 index 25 */
143 efi_exit_boot_services exit_boot_services; /*232 index 26 */
144 void *get_next_monotonic_count; /*240 index 27 */
145 void *stall; /*248 index 28 */
146 void *set_watchdog_timer; /*256 index 29 */
147 void *connect_controller; /*264 index 30 */
148 void *disconnect_controller; /*272 index 31 */
149 void *open_protocol; /*280 index 32 */
150 void *close_protocol; /*288 index 33 */
151 void *open_protocol_information; /*296 index 34 */
152 void *protocols_per_handle; /*304 index 35 */
153 void *locate_handle_buffer; /*312 index 36 */
154 efi_locate_protocol locate_protocol; /*320 index 37 */
155 void *install_multiple_protocols; /*328 index 38 */
156 void *uninstall_multiple_protocols;/*336 index 39 */
157 void *calculate_crc32; /*344 index 40 */
158 void *copy_mem; /*352 index 41 */
159 void *set_mem; /*360 index 42 */
160 void *create_event_ex; /*368 index 43 */
161};
162
163/* ---- GUID for Simple File System Protocol ---- */
164#define EFI_SIMPLE_FILE_SYSTEM_GUID \
165 {0x0964e5b22, 0x6459, 0x11d2, {0x8e,0x39,0x00,0xa0,0xc9,0x69,0x72,0x3b}}
166
167/* ---- file protocol ---- */
168typedef struct {
169 u64 revision;
170 efi_open_volume open_volume;
171} efi_simple_file_system;
172
173typedef struct efi_file_protocol efi_file_protocol;
174
175typedef u64 (*efi_file_open)(efi_file_protocol *, efi_file_protocol **, char16 *, u64, u64);
176typedef u64 (*efi_file_read)(efi_file_protocol *, u64 *, void *);
177typedef u64 (*efi_file_close)(efi_file_protocol *);
178
179#define EFI_FILE_MODE_READ 1
180
181struct efi_file_protocol {
182 u64 revision;
183 efi_file_open open;
184 efi_file_close close;
185 void *unused;
186 efi_file_read read;
187 void *unused2[5];
188};
189
190/* ---- file info (for getting file size) ---- */
191typedef struct {
192 u64 size;
193 u64 file_size;
194 u64 physical_size;
195 efi_time create_time;
196 efi_time last_access;
197 efi_time modification_time;
198 u64 attribute;
199 char16 file_name[1];
200} efi_file_info;
201
202/* ---- loaded image protocol ---- */
203typedef struct {
204 u32 revision;
205 handle parent_handle;
206 handle system_table;
207 handle device_handle;
208 void *file_path;
209 void *reserved;
210 u32 load_options_size;
211 void *load_options;
212 void *image_base;
213 u64 image_size;
214 u64 image_code_type;
215 u64 image_data_type;
216 void *unused;
217} efi_loaded_image;
218
219/* ---- loaded image protocol GUID ---- */
220#define EFI_LOADED_IMAGE_GUID \
221 {0x5b1b31a1, 0x9562, 0x11d2, {0x8e,0x3f,0x00,0xa0,0xc9,0x69,0x72,0x3b}}
222
223/* ---- device path protocol ---- */
224typedef struct {
225 u8 type;
226 u8 sub_type;
227 u16 length;
228} efi_device_path;
229
230#endif /* UEFI_H */
generated by cgit v1.2.3 (git 2.46.0) at 2026-11-08 05:17:47 +0000