1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * Extensible Firmware Interface
4 * Based on 'Extensible Firmware Interface Specification' version 0.9,
5 * April 30, 1999
6 *
7 * Copyright (C) 1999 VA Linux Systems
8 * Copyright (C) 1999 Walt Drummond <drummond@valinux.com>
9 * Copyright (C) 1999, 2002-2003 Hewlett-Packard Co.
10 * David Mosberger-Tang <davidm@hpl.hp.com>
11 * Stephane Eranian <eranian@hpl.hp.com>
12 *
13 * From include/linux/efi.h in kernel 4.1 with some additions/subtractions
14 */
15
16 #ifndef _EFI_H
17 #define _EFI_H
18
19 #include <linux/linkage.h>
20 #include <linux/string.h>
21 #include <linux/types.h>
22
23 /* Type INTN in UEFI specification */
24 #define efi_intn_t ssize_t
25 /* Type UINTN in UEFI specification*/
26 #define efi_uintn_t size_t
27
28 /*
29 * EFI on x86_64 uses the Microsoft ABI which is not the default for GCC.
30 *
31 * There are two scenarios for EFI on x86_64: building a 64-bit EFI stub
32 * codes (CONFIG_EFI_STUB_64BIT) and building a 64-bit U-Boot (CONFIG_X86_64).
33 * Either needs to be properly built with the '-m64' compiler flag, and hence
34 * it is enough to only check the compiler provided define __x86_64__ here.
35 */
36 #ifdef __x86_64__
37 #define EFIAPI __attribute__((ms_abi))
38 #define efi_va_list __builtin_ms_va_list
39 #define efi_va_start __builtin_ms_va_start
40 #define efi_va_arg __builtin_va_arg
41 #define efi_va_end __builtin_ms_va_end
42 #else
43 #define EFIAPI asmlinkage
44 #define efi_va_list va_list
45 #define efi_va_start va_start
46 #define efi_va_arg va_arg
47 #define efi_va_end va_end
48 #endif /* __x86_64__ */
49
50 #define EFI32_LOADER_SIGNATURE "EL32"
51 #define EFI64_LOADER_SIGNATURE "EL64"
52
53 struct efi_device_path;
54
55 typedef struct {
56 u8 b[16];
57 } efi_guid_t __attribute__((aligned(8)));
58
59 #define EFI_BITS_PER_LONG (sizeof(long) * 8)
60
61 /* Bit mask for EFI status code with error */
62 #define EFI_ERROR_MASK (1UL << (EFI_BITS_PER_LONG - 1))
63 /* Status codes returned by EFI protocols */
64 #define EFI_SUCCESS 0
65 #define EFI_LOAD_ERROR (EFI_ERROR_MASK | 1)
66 #define EFI_INVALID_PARAMETER (EFI_ERROR_MASK | 2)
67 #define EFI_UNSUPPORTED (EFI_ERROR_MASK | 3)
68 #define EFI_BAD_BUFFER_SIZE (EFI_ERROR_MASK | 4)
69 #define EFI_BUFFER_TOO_SMALL (EFI_ERROR_MASK | 5)
70 #define EFI_NOT_READY (EFI_ERROR_MASK | 6)
71 #define EFI_DEVICE_ERROR (EFI_ERROR_MASK | 7)
72 #define EFI_WRITE_PROTECTED (EFI_ERROR_MASK | 8)
73 #define EFI_OUT_OF_RESOURCES (EFI_ERROR_MASK | 9)
74 #define EFI_VOLUME_CORRUPTED (EFI_ERROR_MASK | 10)
75 #define EFI_VOLUME_FULL (EFI_ERROR_MASK | 11)
76 #define EFI_NO_MEDIA (EFI_ERROR_MASK | 12)
77 #define EFI_MEDIA_CHANGED (EFI_ERROR_MASK | 13)
78 #define EFI_NOT_FOUND (EFI_ERROR_MASK | 14)
79 #define EFI_ACCESS_DENIED (EFI_ERROR_MASK | 15)
80 #define EFI_NO_RESPONSE (EFI_ERROR_MASK | 16)
81 #define EFI_NO_MAPPING (EFI_ERROR_MASK | 17)
82 #define EFI_TIMEOUT (EFI_ERROR_MASK | 18)
83 #define EFI_NOT_STARTED (EFI_ERROR_MASK | 19)
84 #define EFI_ALREADY_STARTED (EFI_ERROR_MASK | 20)
85 #define EFI_ABORTED (EFI_ERROR_MASK | 21)
86 #define EFI_ICMP_ERROR (EFI_ERROR_MASK | 22)
87 #define EFI_TFTP_ERROR (EFI_ERROR_MASK | 23)
88 #define EFI_PROTOCOL_ERROR (EFI_ERROR_MASK | 24)
89 #define EFI_INCOMPATIBLE_VERSION (EFI_ERROR_MASK | 25)
90 #define EFI_SECURITY_VIOLATION (EFI_ERROR_MASK | 26)
91 #define EFI_CRC_ERROR (EFI_ERROR_MASK | 27)
92 #define EFI_END_OF_MEDIA (EFI_ERROR_MASK | 28)
93 #define EFI_END_OF_FILE (EFI_ERROR_MASK | 31)
94 #define EFI_INVALID_LANGUAGE (EFI_ERROR_MASK | 32)
95 #define EFI_COMPROMISED_DATA (EFI_ERROR_MASK | 33)
96 #define EFI_IP_ADDRESS_CONFLICT (EFI_ERROR_MASK | 34)
97 #define EFI_HTTP_ERROR (EFI_ERROR_MASK | 35)
98
99 #define EFI_WARN_UNKNOWN_GLYPH 1
100 #define EFI_WARN_DELETE_FAILURE 2
101 #define EFI_WARN_WRITE_FAILURE 3
102 #define EFI_WARN_BUFFER_TOO_SMALL 4
103 #define EFI_WARN_STALE_DATA 5
104 #define EFI_WARN_FILE_SYSTEM 6
105 #define EFI_WARN_RESET_REQUIRED 7
106
107 typedef unsigned long efi_status_t;
108 typedef u64 efi_physical_addr_t;
109 typedef u64 efi_virtual_addr_t;
110 typedef struct efi_object *efi_handle_t;
111
112 #define EFI_GUID(a, b, c, d0, d1, d2, d3, d4, d5, d6, d7) \
113 {{ (a) & 0xff, ((a) >> 8) & 0xff, ((a) >> 16) & 0xff, \
114 ((a) >> 24) & 0xff, \
115 (b) & 0xff, ((b) >> 8) & 0xff, \
116 (c) & 0xff, ((c) >> 8) & 0xff, \
117 (d0), (d1), (d2), (d3), (d4), (d5), (d6), (d7) } }
118
119 /* Generic EFI table header */
120 struct efi_table_hdr {
121 u64 signature;
122 u32 revision;
123 u32 headersize;
124 u32 crc32;
125 u32 reserved;
126 };
127
128 /* Enumeration of memory types introduced in UEFI */
129 enum efi_mem_type {
130 EFI_RESERVED_MEMORY_TYPE,
131 /*
132 * The code portions of a loaded application.
133 * (Note that UEFI OS loaders are UEFI applications.)
134 */
135 EFI_LOADER_CODE,
136 /*
137 * The data portions of a loaded application and
138 * the default data allocation type used by an application
139 * to allocate pool memory.
140 */
141 EFI_LOADER_DATA,
142 /* The code portions of a loaded Boot Services Driver */
143 EFI_BOOT_SERVICES_CODE,
144 /*
145 * The data portions of a loaded Boot Services Driver and
146 * the default data allocation type used by a Boot Services
147 * Driver to allocate pool memory.
148 */
149 EFI_BOOT_SERVICES_DATA,
150 /* The code portions of a loaded Runtime Services Driver */
151 EFI_RUNTIME_SERVICES_CODE,
152 /*
153 * The data portions of a loaded Runtime Services Driver and
154 * the default data allocation type used by a Runtime Services
155 * Driver to allocate pool memory.
156 */
157 EFI_RUNTIME_SERVICES_DATA,
158 /* Free (unallocated) memory */
159 EFI_CONVENTIONAL_MEMORY,
160 /* Memory in which errors have been detected */
161 EFI_UNUSABLE_MEMORY,
162 /* Memory that holds the ACPI tables */
163 EFI_ACPI_RECLAIM_MEMORY,
164 /* Address space reserved for use by the firmware */
165 EFI_ACPI_MEMORY_NVS,
166 /*
167 * Used by system firmware to request that a memory-mapped IO region
168 * be mapped by the OS to a virtual address so it can be accessed by
169 * EFI runtime services.
170 */
171 EFI_MMAP_IO,
172 /*
173 * System memory-mapped IO region that is used to translate
174 * memory cycles to IO cycles by the processor.
175 */
176 EFI_MMAP_IO_PORT,
177 /*
178 * Address space reserved by the firmware for code that is
179 * part of the processor.
180 */
181 EFI_PAL_CODE,
182 /*
183 * Non-volatile memory.
184 */
185 EFI_PERSISTENT_MEMORY_TYPE,
186
187 EFI_MAX_MEMORY_TYPE,
188 };
189
190 /* Attribute values */
191 #define EFI_MEMORY_UC ((u64)0x0000000000000001ULL) /* uncached */
192 #define EFI_MEMORY_WC ((u64)0x0000000000000002ULL) /* write-coalescing */
193 #define EFI_MEMORY_WT ((u64)0x0000000000000004ULL) /* write-through */
194 #define EFI_MEMORY_WB ((u64)0x0000000000000008ULL) /* write-back */
195 #define EFI_MEMORY_UCE ((u64)0x0000000000000010ULL) /* uncached, exported */
196 #define EFI_MEMORY_WP ((u64)0x0000000000001000ULL) /* write-protect */
197 #define EFI_MEMORY_RP ((u64)0x0000000000002000ULL) /* read-protect */
198 #define EFI_MEMORY_XP ((u64)0x0000000000004000ULL) /* execute-protect */
199 #define EFI_MEMORY_NV ((u64)0x0000000000008000ULL) /* non-volatile */
200 #define EFI_MEMORY_MORE_RELIABLE \
201 ((u64)0x0000000000010000ULL) /* higher reliability */
202 #define EFI_MEMORY_RO ((u64)0x0000000000020000ULL) /* read-only */
203 #define EFI_MEMORY_SP ((u64)0x0000000000040000ULL) /* specific-purpose memory (SPM) */
204 #define EFI_MEMORY_RUNTIME ((u64)0x8000000000000000ULL) /* range requires runtime mapping */
205 #define EFI_MEM_DESC_VERSION 1
206
207 #define EFI_PAGE_SHIFT 12
208 #define EFI_PAGE_SIZE (1ULL << EFI_PAGE_SHIFT)
209 #define EFI_PAGE_MASK (EFI_PAGE_SIZE - 1)
210
211 struct efi_mem_desc {
212 u32 type;
213 u32 reserved;
214 efi_physical_addr_t physical_start;
215 efi_virtual_addr_t virtual_start;
216 u64 num_pages;
217 u64 attribute;
218 };
219
220 #define EFI_MEMORY_DESCRIPTOR_VERSION 1
221
222 /* Allocation types for calls to boottime->allocate_pages*/
223 #define EFI_ALLOCATE_ANY_PAGES 0
224 #define EFI_ALLOCATE_MAX_ADDRESS 1
225 #define EFI_ALLOCATE_ADDRESS 2
226 #define EFI_MAX_ALLOCATE_TYPE 3
227
228 /* Types and defines for Time Services */
229 #define EFI_TIME_ADJUST_DAYLIGHT 0x1
230 #define EFI_TIME_IN_DAYLIGHT 0x2
231 #define EFI_UNSPECIFIED_TIMEZONE 0x07ff
232
233 struct efi_time {
234 u16 year;
235 u8 month;
236 u8 day;
237 u8 hour;
238 u8 minute;
239 u8 second;
240 u8 pad1;
241 u32 nanosecond;
242 s16 timezone;
243 u8 daylight;
244 u8 pad2;
245 };
246
247 struct efi_time_cap {
248 u32 resolution;
249 u32 accuracy;
250 u8 sets_to_zero;
251 };
252
253 enum efi_locate_search_type {
254 ALL_HANDLES,
255 BY_REGISTER_NOTIFY,
256 BY_PROTOCOL
257 };
258
259 struct efi_open_protocol_info_entry {
260 efi_handle_t agent_handle;
261 efi_handle_t controller_handle;
262 u32 attributes;
263 u32 open_count;
264 };
265
266 enum efi_entry_t {
267 EFIET_END, /* Signals this is the last (empty) entry */
268 EFIET_MEMORY_MAP,
269 EFIET_GOP_MODE,
270 EFIET_SYS_TABLE,
271
272 /* Number of entries */
273 EFIET_MEMORY_COUNT,
274 };
275
276 #define EFI_TABLE_VERSION 1
277
278 /**
279 * struct efi_info_hdr - Header for the EFI info table
280 *
281 * @version: EFI_TABLE_VERSION
282 * @hdr_size: Size of this struct in bytes
283 * @total_size: Total size of this header plus following data
284 * @spare: Spare space for expansion
285 */
286 struct efi_info_hdr {
287 u32 version;
288 u32 hdr_size;
289 u32 total_size;
290 u32 spare[5];
291 };
292
293 /**
294 * struct efi_entry_hdr - Header for a table entry
295 *
296 * @type: enum eft_entry_t
297 * @size size of entry bytes excluding header and padding
298 * @addr: address of this entry (0 if it follows the header )
299 * @link: size of entry including header and padding
300 * @spare1: Spare space for expansion
301 * @spare2: Spare space for expansion
302 */
303 struct efi_entry_hdr {
304 u32 type;
305 u32 size;
306 u64 addr;
307 u32 link;
308 u32 spare1;
309 u64 spare2;
310 };
311
312 /**
313 * struct efi_entry_memmap - a memory map table passed to U-Boot
314 *
315 * @version: EFI's memory map table version
316 * @desc_size: EFI's size of each memory descriptor
317 * @spare: Spare space for expansion
318 * @desc: An array of descriptors, each @desc_size bytes apart
319 */
320 struct efi_entry_memmap {
321 u32 version;
322 u32 desc_size;
323 u64 spare;
324 struct efi_mem_desc desc[];
325 };
326
327 /**
328 * struct efi_entry_gopmode - a GOP mode table passed to U-Boot
329 *
330 * @fb_base: EFI's framebuffer base address
331 * @fb_size: EFI's framebuffer size
332 * @info_size: GOP mode info structure size
333 * @info: Start address of the GOP mode info structure
334 */
335 struct efi_entry_gopmode {
336 efi_physical_addr_t fb_base;
337 /*
338 * Not like the ones in 'struct efi_gop_mode' which are 'unsigned
339 * long', @fb_size and @info_size have to be 'u64' here. As the EFI
340 * stub codes may have different bit size from the U-Boot payload,
341 * using 'long' will cause mismatch between the producer (stub) and
342 * the consumer (payload).
343 */
344 u64 fb_size;
345 u64 info_size;
346 /*
347 * We cannot directly use 'struct efi_gop_mode_info info[]' here as
348 * it causes compiler to complain: array type has incomplete element
349 * type 'struct efi_gop_mode_info'.
350 */
351 struct /* efi_gop_mode_info */ {
352 u32 version;
353 u32 width;
354 u32 height;
355 u32 pixel_format;
356 u32 pixel_bitmask[4];
357 u32 pixels_per_scanline;
358 } info[];
359 };
360
361 /**
362 * struct efi_entry_systable - system table passed to U-Boot
363 *
364 * @sys_table: EFI system table address
365 */
366 struct efi_entry_systable {
367 efi_physical_addr_t sys_table;
368 };
369
efi_get_next_mem_desc(struct efi_entry_memmap * map,struct efi_mem_desc * desc)370 static inline struct efi_mem_desc *efi_get_next_mem_desc(
371 struct efi_entry_memmap *map, struct efi_mem_desc *desc)
372 {
373 return (struct efi_mem_desc *)((ulong)desc + map->desc_size);
374 }
375
376 struct efi_priv {
377 efi_handle_t parent_image;
378 struct efi_device_path *device_path;
379 struct efi_system_table *sys_table;
380 struct efi_boot_services *boot;
381 struct efi_runtime_services *run;
382 bool use_pool_for_malloc;
383 unsigned long ram_base;
384 unsigned int image_data_type;
385 struct efi_info_hdr *info;
386 unsigned int info_size;
387 void *next_hdr;
388 };
389
390 /* Base address of the EFI image */
391 extern char image_base[];
392
393 /* Start and end of U-Boot image (for payload) */
394 extern char _binary_u_boot_bin_start[], _binary_u_boot_bin_end[];
395
396 /*
397 * Variable Attributes
398 */
399 #define EFI_VARIABLE_NON_VOLATILE 0x0000000000000001
400 #define EFI_VARIABLE_BOOTSERVICE_ACCESS 0x0000000000000002
401 #define EFI_VARIABLE_RUNTIME_ACCESS 0x0000000000000004
402 #define EFI_VARIABLE_HARDWARE_ERROR_RECORD 0x0000000000000008
403 #define EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS 0x0000000000000010
404 #define EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS 0x0000000000000020
405 #define EFI_VARIABLE_APPEND_WRITE 0x0000000000000040
406
407 #define EFI_VARIABLE_MASK (EFI_VARIABLE_NON_VOLATILE | \
408 EFI_VARIABLE_BOOTSERVICE_ACCESS | \
409 EFI_VARIABLE_RUNTIME_ACCESS | \
410 EFI_VARIABLE_HARDWARE_ERROR_RECORD | \
411 EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS | \
412 EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS | \
413 EFI_VARIABLE_APPEND_WRITE)
414
415 /**
416 * efi_get_sys_table() - Get access to the main EFI system table
417 *
418 * @return pointer to EFI system table
419 */
420
421 struct efi_system_table *efi_get_sys_table(void);
422
423 /**
424 * efi_get_ram_base() - Find the base of RAM
425 *
426 * This is used when U-Boot is built as an EFI application.
427 *
428 * @return the base of RAM as known to U-Boot
429 */
430 unsigned long efi_get_ram_base(void);
431
432 /**
433 * efi_init() - Set up ready for use of EFI boot services
434 *
435 * @priv: Pointer to our private EFI structure to fill in
436 * @banner: Banner to display when starting
437 * @image: The image handle passed to efi_main()
438 * @sys_table: The EFI system table pointer passed to efi_main()
439 */
440 int efi_init(struct efi_priv *priv, const char *banner, efi_handle_t image,
441 struct efi_system_table *sys_table);
442
443 /**
444 * efi_malloc() - Allocate some memory from EFI
445 *
446 * @priv: Pointer to private EFI structure
447 * @size: Number of bytes to allocate
448 * @retp: Return EFI status result
449 * @return pointer to memory allocated, or NULL on error
450 */
451 void *efi_malloc(struct efi_priv *priv, int size, efi_status_t *retp);
452
453 /**
454 * efi_free() - Free memory allocated from EFI
455 *
456 * @priv: Pointer to private EFI structure
457 * @ptr: Pointer to memory to free
458 */
459 void efi_free(struct efi_priv *priv, void *ptr);
460
461 /**
462 * efi_puts() - Write out a string to the EFI console
463 *
464 * @priv: Pointer to private EFI structure
465 * @str: String to write (note this is a ASCII, not unicode)
466 */
467 void efi_puts(struct efi_priv *priv, const char *str);
468
469 /**
470 * efi_putc() - Write out a character to the EFI console
471 *
472 * @priv: Pointer to private EFI structure
473 * @ch: Character to write (note this is not unicode)
474 */
475 void efi_putc(struct efi_priv *priv, const char ch);
476
477 /**
478 * efi_info_get() - get an entry from an EFI table
479 *
480 * @type: Entry type to search for
481 * @datap: Returns pointer to entry data
482 * @sizep: Returns pointer to entry size
483 * @return 0 if OK, -ENODATA if there is no table, -ENOENT if there is no entry
484 * of the requested type, -EPROTONOSUPPORT if the table has the wrong version
485 */
486 int efi_info_get(enum efi_entry_t type, void **datap, int *sizep);
487
488 #endif /* _LINUX_EFI_H */
489