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Heinrich Schuchardt04a0f562018-09-08 10:57:59 +02001/* SPDX-License-Identifier: GPL-2.0 */
Simon Glass867a6ac2015-07-31 09:31:36 -06002/*
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
Simon Glassa0b49bc2016-09-25 15:27:31 -060019#include <linux/linkage.h>
Simon Glass867a6ac2015-07-31 09:31:36 -060020#include <linux/string.h>
21#include <linux/types.h>
22
Alexander Graf01866442018-06-22 01:38:26 -070023/*
24 * EFI on x86_64 uses the Microsoft ABI which is not the default for GCC.
25 *
26 * There are two scenarios for EFI on x86_64: building a 64-bit EFI stub
27 * codes (CONFIG_EFI_STUB_64BIT) and building a 64-bit U-Boot (CONFIG_X86_64).
28 * Either needs to be properly built with the '-m64' compiler flag, and hence
29 * it is enough to only check the compiler provided define __x86_64__ here.
30 */
31#ifdef __x86_64__
Simon Glass96a8d402015-08-04 12:33:56 -060032#define EFIAPI __attribute__((ms_abi))
Alexander Grafbeb077a2018-06-18 17:23:05 +020033#define efi_va_list __builtin_ms_va_list
34#define efi_va_start __builtin_ms_va_start
35#define efi_va_arg __builtin_va_arg
36#define efi_va_end __builtin_ms_va_end
Simon Glass96a8d402015-08-04 12:33:56 -060037#else
Simon Glassa0b49bc2016-09-25 15:27:31 -060038#define EFIAPI asmlinkage
Alexander Grafbeb077a2018-06-18 17:23:05 +020039#define efi_va_list va_list
40#define efi_va_start va_start
41#define efi_va_arg va_arg
42#define efi_va_end va_end
Alexander Graf01866442018-06-22 01:38:26 -070043#endif /* __x86_64__ */
Simon Glass96a8d402015-08-04 12:33:56 -060044
Bin Meng1fdeacd2018-08-23 08:24:10 -070045#define EFI32_LOADER_SIGNATURE "EL32"
46#define EFI64_LOADER_SIGNATURE "EL64"
47
Simon Glass867a6ac2015-07-31 09:31:36 -060048struct efi_device_path;
49
Rob Clark0d6ab322017-09-13 18:05:24 -040050typedef struct {
51 u8 b[16];
Heinrich Schuchardt4b05fe92018-12-16 11:16:03 +010052} efi_guid_t __attribute__((aligned(8)));
Rob Clark0d6ab322017-09-13 18:05:24 -040053
Alexander Graf01866442018-06-22 01:38:26 -070054#define EFI_BITS_PER_LONG (sizeof(long) * 8)
Bin Meng3e6cc352016-08-25 01:47:18 -070055
xypron.glpk@gmx.de3c8ffb62017-07-04 23:15:22 +020056/* Bit mask for EFI status code with error */
57#define EFI_ERROR_MASK (1UL << (EFI_BITS_PER_LONG - 1))
58/* Status codes returned by EFI protocols */
59#define EFI_SUCCESS 0
60#define EFI_LOAD_ERROR (EFI_ERROR_MASK | 1)
61#define EFI_INVALID_PARAMETER (EFI_ERROR_MASK | 2)
62#define EFI_UNSUPPORTED (EFI_ERROR_MASK | 3)
63#define EFI_BAD_BUFFER_SIZE (EFI_ERROR_MASK | 4)
64#define EFI_BUFFER_TOO_SMALL (EFI_ERROR_MASK | 5)
65#define EFI_NOT_READY (EFI_ERROR_MASK | 6)
66#define EFI_DEVICE_ERROR (EFI_ERROR_MASK | 7)
67#define EFI_WRITE_PROTECTED (EFI_ERROR_MASK | 8)
68#define EFI_OUT_OF_RESOURCES (EFI_ERROR_MASK | 9)
69#define EFI_VOLUME_CORRUPTED (EFI_ERROR_MASK | 10)
70#define EFI_VOLUME_FULL (EFI_ERROR_MASK | 11)
71#define EFI_NO_MEDIA (EFI_ERROR_MASK | 12)
72#define EFI_MEDIA_CHANGED (EFI_ERROR_MASK | 13)
73#define EFI_NOT_FOUND (EFI_ERROR_MASK | 14)
74#define EFI_ACCESS_DENIED (EFI_ERROR_MASK | 15)
75#define EFI_NO_RESPONSE (EFI_ERROR_MASK | 16)
76#define EFI_NO_MAPPING (EFI_ERROR_MASK | 17)
77#define EFI_TIMEOUT (EFI_ERROR_MASK | 18)
78#define EFI_NOT_STARTED (EFI_ERROR_MASK | 19)
79#define EFI_ALREADY_STARTED (EFI_ERROR_MASK | 20)
80#define EFI_ABORTED (EFI_ERROR_MASK | 21)
81#define EFI_ICMP_ERROR (EFI_ERROR_MASK | 22)
82#define EFI_TFTP_ERROR (EFI_ERROR_MASK | 23)
83#define EFI_PROTOCOL_ERROR (EFI_ERROR_MASK | 24)
84#define EFI_INCOMPATIBLE_VERSION (EFI_ERROR_MASK | 25)
85#define EFI_SECURITY_VIOLATION (EFI_ERROR_MASK | 26)
86#define EFI_CRC_ERROR (EFI_ERROR_MASK | 27)
87#define EFI_END_OF_MEDIA (EFI_ERROR_MASK | 28)
88#define EFI_END_OF_FILE (EFI_ERROR_MASK | 31)
89#define EFI_INVALID_LANGUAGE (EFI_ERROR_MASK | 32)
90#define EFI_COMPROMISED_DATA (EFI_ERROR_MASK | 33)
91#define EFI_IP_ADDRESS_CONFLICT (EFI_ERROR_MASK | 34)
92#define EFI_HTTP_ERROR (EFI_ERROR_MASK | 35)
Simon Glass867a6ac2015-07-31 09:31:36 -060093
Heinrich Schuchardt7b31efc2020-01-03 22:47:19 +010094#define EFI_WARN_UNKNOWN_GLYPH 1
95#define EFI_WARN_DELETE_FAILURE 2
96#define EFI_WARN_WRITE_FAILURE 3
97#define EFI_WARN_BUFFER_TOO_SMALL 4
98#define EFI_WARN_STALE_DATA 5
99#define EFI_WARN_FILE_SYSTEM 6
100#define EFI_WARN_RESET_REQUIRED 7
Rob Clark2a920802017-09-13 18:05:34 -0400101
Simon Glass867a6ac2015-07-31 09:31:36 -0600102typedef unsigned long efi_status_t;
103typedef u64 efi_physical_addr_t;
104typedef u64 efi_virtual_addr_t;
Heinrich Schuchardtfaea1042018-09-26 05:27:54 +0200105typedef struct efi_object *efi_handle_t;
Simon Glass867a6ac2015-07-31 09:31:36 -0600106
107#define EFI_GUID(a, b, c, d0, d1, d2, d3, d4, d5, d6, d7) \
Simon Glass867a6ac2015-07-31 09:31:36 -0600108 {{ (a) & 0xff, ((a) >> 8) & 0xff, ((a) >> 16) & 0xff, \
109 ((a) >> 24) & 0xff, \
110 (b) & 0xff, ((b) >> 8) & 0xff, \
111 (c) & 0xff, ((c) >> 8) & 0xff, \
Heinrich Schuchardt44ab2d32018-06-09 17:50:18 +0200112 (d0), (d1), (d2), (d3), (d4), (d5), (d6), (d7) } }
Simon Glass867a6ac2015-07-31 09:31:36 -0600113
114/* Generic EFI table header */
115struct efi_table_hdr {
116 u64 signature;
117 u32 revision;
118 u32 headersize;
119 u32 crc32;
120 u32 reserved;
121};
122
123/* Enumeration of memory types introduced in UEFI */
124enum efi_mem_type {
125 EFI_RESERVED_MEMORY_TYPE,
126 /*
127 * The code portions of a loaded application.
128 * (Note that UEFI OS loaders are UEFI applications.)
129 */
130 EFI_LOADER_CODE,
131 /*
132 * The data portions of a loaded application and
133 * the default data allocation type used by an application
134 * to allocate pool memory.
135 */
136 EFI_LOADER_DATA,
137 /* The code portions of a loaded Boot Services Driver */
138 EFI_BOOT_SERVICES_CODE,
139 /*
Heinrich Schuchardt29f1a362017-09-18 07:54:50 +0200140 * The data portions of a loaded Boot Services Driver and
Simon Glass867a6ac2015-07-31 09:31:36 -0600141 * the default data allocation type used by a Boot Services
142 * Driver to allocate pool memory.
143 */
144 EFI_BOOT_SERVICES_DATA,
145 /* The code portions of a loaded Runtime Services Driver */
146 EFI_RUNTIME_SERVICES_CODE,
147 /*
148 * The data portions of a loaded Runtime Services Driver and
149 * the default data allocation type used by a Runtime Services
150 * Driver to allocate pool memory.
151 */
152 EFI_RUNTIME_SERVICES_DATA,
153 /* Free (unallocated) memory */
154 EFI_CONVENTIONAL_MEMORY,
155 /* Memory in which errors have been detected */
156 EFI_UNUSABLE_MEMORY,
157 /* Memory that holds the ACPI tables */
158 EFI_ACPI_RECLAIM_MEMORY,
159 /* Address space reserved for use by the firmware */
160 EFI_ACPI_MEMORY_NVS,
161 /*
162 * Used by system firmware to request that a memory-mapped IO region
163 * be mapped by the OS to a virtual address so it can be accessed by
164 * EFI runtime services.
165 */
166 EFI_MMAP_IO,
167 /*
168 * System memory-mapped IO region that is used to translate
169 * memory cycles to IO cycles by the processor.
170 */
171 EFI_MMAP_IO_PORT,
172 /*
173 * Address space reserved by the firmware for code that is
174 * part of the processor.
175 */
176 EFI_PAL_CODE,
Heinrich Schuchardtf12bcc92019-04-23 00:30:53 +0200177 /*
178 * Non-volatile memory.
179 */
180 EFI_PERSISTENT_MEMORY_TYPE,
Simon Glass867a6ac2015-07-31 09:31:36 -0600181
182 EFI_MAX_MEMORY_TYPE,
183 EFI_TABLE_END, /* For efi_build_mem_table() */
184};
185
186/* Attribute values */
Eugeniu Rosca9b891832018-07-14 22:53:30 +0200187#define EFI_MEMORY_UC ((u64)0x0000000000000001ULL) /* uncached */
188#define EFI_MEMORY_WC ((u64)0x0000000000000002ULL) /* write-coalescing */
189#define EFI_MEMORY_WT ((u64)0x0000000000000004ULL) /* write-through */
190#define EFI_MEMORY_WB ((u64)0x0000000000000008ULL) /* write-back */
191#define EFI_MEMORY_UCE ((u64)0x0000000000000010ULL) /* uncached, exported */
192#define EFI_MEMORY_WP ((u64)0x0000000000001000ULL) /* write-protect */
193#define EFI_MEMORY_RP ((u64)0x0000000000002000ULL) /* read-protect */
194#define EFI_MEMORY_XP ((u64)0x0000000000004000ULL) /* execute-protect */
Eugeniu Roscac3a40cc2018-07-14 22:53:31 +0200195#define EFI_MEMORY_NV ((u64)0x0000000000008000ULL) /* non-volatile */
196#define EFI_MEMORY_MORE_RELIABLE \
197 ((u64)0x0000000000010000ULL) /* higher reliability */
198#define EFI_MEMORY_RO ((u64)0x0000000000020000ULL) /* read-only */
Heinrich Schuchardt255a4732020-05-19 07:20:46 +0200199#define EFI_MEMORY_SP ((u64)0x0000000000040000ULL) /* specific-purpose memory (SPM) */
Eugeniu Rosca9b891832018-07-14 22:53:30 +0200200#define EFI_MEMORY_RUNTIME ((u64)0x8000000000000000ULL) /* range requires runtime mapping */
201#define EFI_MEM_DESC_VERSION 1
Simon Glass867a6ac2015-07-31 09:31:36 -0600202
203#define EFI_PAGE_SHIFT 12
Patrick Wildt60fd8842019-04-09 22:58:30 +0200204#define EFI_PAGE_SIZE (1ULL << EFI_PAGE_SHIFT)
Alexander Graf2bb9b792016-03-04 01:09:57 +0100205#define EFI_PAGE_MASK (EFI_PAGE_SIZE - 1)
Simon Glass867a6ac2015-07-31 09:31:36 -0600206
207struct efi_mem_desc {
208 u32 type;
209 u32 reserved;
210 efi_physical_addr_t physical_start;
211 efi_virtual_addr_t virtual_start;
212 u64 num_pages;
213 u64 attribute;
214};
215
Mian Yousaf Kaukab4c02c112016-09-05 23:59:22 +0200216#define EFI_MEMORY_DESCRIPTOR_VERSION 1
217
Simon Glass867a6ac2015-07-31 09:31:36 -0600218/* Allocation types for calls to boottime->allocate_pages*/
219#define EFI_ALLOCATE_ANY_PAGES 0
220#define EFI_ALLOCATE_MAX_ADDRESS 1
221#define EFI_ALLOCATE_ADDRESS 2
222#define EFI_MAX_ALLOCATE_TYPE 3
223
224/* Types and defines for Time Services */
225#define EFI_TIME_ADJUST_DAYLIGHT 0x1
226#define EFI_TIME_IN_DAYLIGHT 0x2
227#define EFI_UNSPECIFIED_TIMEZONE 0x07ff
228
229struct efi_time {
230 u16 year;
231 u8 month;
232 u8 day;
233 u8 hour;
234 u8 minute;
235 u8 second;
236 u8 pad1;
237 u32 nanosecond;
238 s16 timezone;
239 u8 daylight;
240 u8 pad2;
241};
242
243struct efi_time_cap {
244 u32 resolution;
245 u32 accuracy;
246 u8 sets_to_zero;
247};
248
249enum efi_locate_search_type {
Heinrich Schuchardt9f0770f2017-11-06 21:17:42 +0100250 ALL_HANDLES,
251 BY_REGISTER_NOTIFY,
252 BY_PROTOCOL
Simon Glass867a6ac2015-07-31 09:31:36 -0600253};
254
255struct efi_open_protocol_info_entry {
256 efi_handle_t agent_handle;
257 efi_handle_t controller_handle;
258 u32 attributes;
259 u32 open_count;
260};
261
262enum efi_entry_t {
263 EFIET_END, /* Signals this is the last (empty) entry */
264 EFIET_MEMORY_MAP,
Bin Mengd1fe9922018-06-12 08:36:21 -0700265 EFIET_GOP_MODE,
Bin Mengcbe503f2018-08-23 08:24:09 -0700266 EFIET_SYS_TABLE,
Simon Glass867a6ac2015-07-31 09:31:36 -0600267
268 /* Number of entries */
269 EFIET_MEMORY_COUNT,
270};
271
272#define EFI_TABLE_VERSION 1
273
274/**
275 * struct efi_info_hdr - Header for the EFI info table
276 *
277 * @version: EFI_TABLE_VERSION
278 * @hdr_size: Size of this struct in bytes
279 * @total_size: Total size of this header plus following data
280 * @spare: Spare space for expansion
281 */
282struct efi_info_hdr {
283 u32 version;
284 u32 hdr_size;
285 u32 total_size;
286 u32 spare[5];
287};
288
289/**
290 * struct efi_entry_hdr - Header for a table entry
291 *
292 * @type: enum eft_entry_t
293 * @size size of entry bytes excluding header and padding
294 * @addr: address of this entry (0 if it follows the header )
295 * @link: size of entry including header and padding
296 * @spare1: Spare space for expansion
297 * @spare2: Spare space for expansion
298 */
299struct efi_entry_hdr {
300 u32 type;
301 u32 size;
302 u64 addr;
303 u32 link;
304 u32 spare1;
305 u64 spare2;
306};
307
308/**
309 * struct efi_entry_memmap - a memory map table passed to U-Boot
310 *
311 * @version: EFI's memory map table version
312 * @desc_size: EFI's size of each memory descriptor
313 * @spare: Spare space for expansion
314 * @desc: An array of descriptors, each @desc_size bytes apart
315 */
316struct efi_entry_memmap {
317 u32 version;
318 u32 desc_size;
319 u64 spare;
320 struct efi_mem_desc desc[];
321};
322
Bin Mengd1fe9922018-06-12 08:36:21 -0700323/**
324 * struct efi_entry_gopmode - a GOP mode table passed to U-Boot
325 *
326 * @fb_base: EFI's framebuffer base address
327 * @fb_size: EFI's framebuffer size
328 * @info_size: GOP mode info structure size
329 * @info: Start address of the GOP mode info structure
330 */
331struct efi_entry_gopmode {
332 efi_physical_addr_t fb_base;
333 /*
334 * Not like the ones in 'struct efi_gop_mode' which are 'unsigned
335 * long', @fb_size and @info_size have to be 'u64' here. As the EFI
336 * stub codes may have different bit size from the U-Boot payload,
337 * using 'long' will cause mismatch between the producer (stub) and
338 * the consumer (payload).
339 */
340 u64 fb_size;
341 u64 info_size;
342 /*
343 * We cannot directly use 'struct efi_gop_mode_info info[]' here as
344 * it causes compiler to complain: array type has incomplete element
345 * type 'struct efi_gop_mode_info'.
346 */
347 struct /* efi_gop_mode_info */ {
348 u32 version;
349 u32 width;
350 u32 height;
351 u32 pixel_format;
352 u32 pixel_bitmask[4];
353 u32 pixels_per_scanline;
354 } info[];
355};
356
Bin Mengcbe503f2018-08-23 08:24:09 -0700357/**
358 * struct efi_entry_systable - system table passed to U-Boot
359 *
360 * @sys_table: EFI system table address
361 */
362struct efi_entry_systable {
363 efi_physical_addr_t sys_table;
364};
365
Simon Glass867a6ac2015-07-31 09:31:36 -0600366static inline struct efi_mem_desc *efi_get_next_mem_desc(
367 struct efi_entry_memmap *map, struct efi_mem_desc *desc)
368{
369 return (struct efi_mem_desc *)((ulong)desc + map->desc_size);
370}
371
372struct efi_priv {
373 efi_handle_t parent_image;
374 struct efi_device_path *device_path;
375 struct efi_system_table *sys_table;
376 struct efi_boot_services *boot;
377 struct efi_runtime_services *run;
378 bool use_pool_for_malloc;
379 unsigned long ram_base;
380 unsigned int image_data_type;
381 struct efi_info_hdr *info;
382 unsigned int info_size;
383 void *next_hdr;
384};
385
386/* Base address of the EFI image */
387extern char image_base[];
388
Simon Glass476476e2015-08-04 12:33:52 -0600389/* Start and end of U-Boot image (for payload) */
Bin Meng3dc51ab2016-08-25 01:47:17 -0700390extern char _binary_u_boot_bin_start[], _binary_u_boot_bin_end[];
Simon Glass476476e2015-08-04 12:33:52 -0600391
Rob Clarkad644e72017-09-13 18:05:37 -0400392/*
393 * Variable Attributes
394 */
395#define EFI_VARIABLE_NON_VOLATILE 0x0000000000000001
396#define EFI_VARIABLE_BOOTSERVICE_ACCESS 0x0000000000000002
397#define EFI_VARIABLE_RUNTIME_ACCESS 0x0000000000000004
398#define EFI_VARIABLE_HARDWARE_ERROR_RECORD 0x0000000000000008
399#define EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS 0x0000000000000010
400#define EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS 0x0000000000000020
401#define EFI_VARIABLE_APPEND_WRITE 0x0000000000000040
402
403#define EFI_VARIABLE_MASK (EFI_VARIABLE_NON_VOLATILE | \
404 EFI_VARIABLE_BOOTSERVICE_ACCESS | \
405 EFI_VARIABLE_RUNTIME_ACCESS | \
406 EFI_VARIABLE_HARDWARE_ERROR_RECORD | \
407 EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS | \
408 EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS | \
409 EFI_VARIABLE_APPEND_WRITE)
410
Simon Glass867a6ac2015-07-31 09:31:36 -0600411/**
412 * efi_get_sys_table() - Get access to the main EFI system table
413 *
414 * @return pointer to EFI system table
415 */
Simon Glass476476e2015-08-04 12:33:52 -0600416
Simon Glass867a6ac2015-07-31 09:31:36 -0600417struct efi_system_table *efi_get_sys_table(void);
418
419/**
420 * efi_get_ram_base() - Find the base of RAM
421 *
422 * This is used when U-Boot is built as an EFI application.
423 *
424 * @return the base of RAM as known to U-Boot
425 */
426unsigned long efi_get_ram_base(void);
427
428/**
429 * efi_init() - Set up ready for use of EFI boot services
430 *
431 * @priv: Pointer to our private EFI structure to fill in
432 * @banner: Banner to display when starting
433 * @image: The image handle passed to efi_main()
434 * @sys_table: The EFI system table pointer passed to efi_main()
435 */
436int efi_init(struct efi_priv *priv, const char *banner, efi_handle_t image,
437 struct efi_system_table *sys_table);
438
439/**
440 * efi_malloc() - Allocate some memory from EFI
441 *
442 * @priv: Pointer to private EFI structure
443 * @size: Number of bytes to allocate
444 * @retp: Return EFI status result
445 * @return pointer to memory allocated, or NULL on error
446 */
447void *efi_malloc(struct efi_priv *priv, int size, efi_status_t *retp);
448
449/**
450 * efi_free() - Free memory allocated from EFI
451 *
452 * @priv: Pointer to private EFI structure
453 * @ptr: Pointer to memory to free
454 */
455void efi_free(struct efi_priv *priv, void *ptr);
456
457/**
458 * efi_puts() - Write out a string to the EFI console
459 *
460 * @priv: Pointer to private EFI structure
461 * @str: String to write (note this is a ASCII, not unicode)
462 */
463void efi_puts(struct efi_priv *priv, const char *str);
464
465/**
466 * efi_putc() - Write out a character to the EFI console
467 *
468 * @priv: Pointer to private EFI structure
469 * @ch: Character to write (note this is not unicode)
470 */
471void efi_putc(struct efi_priv *priv, const char ch);
472
473/**
474 * efi_info_get() - get an entry from an EFI table
475 *
476 * @type: Entry type to search for
477 * @datap: Returns pointer to entry data
478 * @sizep: Returns pointer to entry size
479 * @return 0 if OK, -ENODATA if there is no table, -ENOENT if there is no entry
480 * of the requested type, -EPROTONOSUPPORT if the table has the wrong version
481 */
482int efi_info_get(enum efi_entry_t type, void **datap, int *sizep);
483
484/**
485 * efi_build_mem_table() - make a sorted copy of the memory table
486 *
487 * @map: Pointer to EFI memory map table
488 * @size: Size of table in bytes
489 * @skip_bs: True to skip boot-time memory and merge it with conventional
490 * memory. This will significantly reduce the number of table
491 * entries.
492 * @return pointer to the new table. It should be freed with free() by the
493 * caller
494 */
495void *efi_build_mem_table(struct efi_entry_memmap *map, int size, bool skip_bs);
496
497#endif /* _LINUX_EFI_H */