1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Extensible Firmware Interface
4 * Based on 'Extensible Firmware Interface Specification' version 0.9,
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>
13 * From include/linux/efi.h in kernel 4.1 with some additions/subtractions
19 #include <linux/linkage.h>
20 #include <linux/string.h>
21 #include <linux/types.h>
24 * EFI on x86_64 uses the Microsoft ABI which is not the default for GCC.
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.
32 #define EFIAPI __attribute__((ms_abi))
33 #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
38 #define EFIAPI asmlinkage
39 #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
43 #endif /* __x86_64__ */
45 #define EFI32_LOADER_SIGNATURE "EL32"
46 #define EFI64_LOADER_SIGNATURE "EL64"
48 struct efi_device_path;
52 } efi_guid_t __attribute__((aligned(8)));
54 #define EFI_BITS_PER_LONG (sizeof(long) * 8)
56 /* 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 */
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)
94 #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
102 typedef unsigned long efi_status_t;
103 typedef u64 efi_physical_addr_t;
104 typedef u64 efi_virtual_addr_t;
105 typedef struct efi_object *efi_handle_t;
107 #define EFI_GUID(a, b, c, d0, d1, d2, d3, d4, d5, d6, d7) \
108 {{ (a) & 0xff, ((a) >> 8) & 0xff, ((a) >> 16) & 0xff, \
109 ((a) >> 24) & 0xff, \
110 (b) & 0xff, ((b) >> 8) & 0xff, \
111 (c) & 0xff, ((c) >> 8) & 0xff, \
112 (d0), (d1), (d2), (d3), (d4), (d5), (d6), (d7) } }
114 /* Generic EFI table header */
115 struct efi_table_hdr {
123 /* Enumeration of memory types introduced in UEFI */
125 EFI_RESERVED_MEMORY_TYPE,
127 * The code portions of a loaded application.
128 * (Note that UEFI OS loaders are UEFI applications.)
132 * The data portions of a loaded application and
133 * the default data allocation type used by an application
134 * to allocate pool memory.
137 /* The code portions of a loaded Boot Services Driver */
138 EFI_BOOT_SERVICES_CODE,
140 * The data portions of a loaded Boot Services Driver and
141 * the default data allocation type used by a Boot Services
142 * Driver to allocate pool memory.
144 EFI_BOOT_SERVICES_DATA,
145 /* The code portions of a loaded Runtime Services Driver */
146 EFI_RUNTIME_SERVICES_CODE,
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.
152 EFI_RUNTIME_SERVICES_DATA,
153 /* Free (unallocated) memory */
154 EFI_CONVENTIONAL_MEMORY,
155 /* Memory in which errors have been detected */
157 /* Memory that holds the ACPI tables */
158 EFI_ACPI_RECLAIM_MEMORY,
159 /* Address space reserved for use by the firmware */
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.
168 * System memory-mapped IO region that is used to translate
169 * memory cycles to IO cycles by the processor.
173 * Address space reserved by the firmware for code that is
174 * part of the processor.
178 * Non-volatile memory.
180 EFI_PERSISTENT_MEMORY_TYPE,
183 EFI_TABLE_END, /* For efi_build_mem_table() */
186 /* Attribute values */
187 #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 */
195 #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 */
199 #define EFI_MEMORY_RUNTIME ((u64)0x8000000000000000ULL) /* range requires runtime mapping */
200 #define EFI_MEM_DESC_VERSION 1
202 #define EFI_PAGE_SHIFT 12
203 #define EFI_PAGE_SIZE (1ULL << EFI_PAGE_SHIFT)
204 #define EFI_PAGE_MASK (EFI_PAGE_SIZE - 1)
206 struct efi_mem_desc {
209 efi_physical_addr_t physical_start;
210 efi_virtual_addr_t virtual_start;
215 #define EFI_MEMORY_DESCRIPTOR_VERSION 1
217 /* Allocation types for calls to boottime->allocate_pages*/
218 #define EFI_ALLOCATE_ANY_PAGES 0
219 #define EFI_ALLOCATE_MAX_ADDRESS 1
220 #define EFI_ALLOCATE_ADDRESS 2
221 #define EFI_MAX_ALLOCATE_TYPE 3
223 /* Types and defines for Time Services */
224 #define EFI_TIME_ADJUST_DAYLIGHT 0x1
225 #define EFI_TIME_IN_DAYLIGHT 0x2
226 #define EFI_UNSPECIFIED_TIMEZONE 0x07ff
242 struct efi_time_cap {
248 enum efi_locate_search_type {
254 struct efi_open_protocol_info_entry {
255 efi_handle_t agent_handle;
256 efi_handle_t controller_handle;
262 EFIET_END, /* Signals this is the last (empty) entry */
267 /* Number of entries */
271 #define EFI_TABLE_VERSION 1
274 * struct efi_info_hdr - Header for the EFI info table
276 * @version: EFI_TABLE_VERSION
277 * @hdr_size: Size of this struct in bytes
278 * @total_size: Total size of this header plus following data
279 * @spare: Spare space for expansion
281 struct efi_info_hdr {
289 * struct efi_entry_hdr - Header for a table entry
291 * @type: enum eft_entry_t
292 * @size size of entry bytes excluding header and padding
293 * @addr: address of this entry (0 if it follows the header )
294 * @link: size of entry including header and padding
295 * @spare1: Spare space for expansion
296 * @spare2: Spare space for expansion
298 struct efi_entry_hdr {
308 * struct efi_entry_memmap - a memory map table passed to U-Boot
310 * @version: EFI's memory map table version
311 * @desc_size: EFI's size of each memory descriptor
312 * @spare: Spare space for expansion
313 * @desc: An array of descriptors, each @desc_size bytes apart
315 struct efi_entry_memmap {
319 struct efi_mem_desc desc[];
323 * struct efi_entry_gopmode - a GOP mode table passed to U-Boot
325 * @fb_base: EFI's framebuffer base address
326 * @fb_size: EFI's framebuffer size
327 * @info_size: GOP mode info structure size
328 * @info: Start address of the GOP mode info structure
330 struct efi_entry_gopmode {
331 efi_physical_addr_t fb_base;
333 * Not like the ones in 'struct efi_gop_mode' which are 'unsigned
334 * long', @fb_size and @info_size have to be 'u64' here. As the EFI
335 * stub codes may have different bit size from the U-Boot payload,
336 * using 'long' will cause mismatch between the producer (stub) and
337 * the consumer (payload).
342 * We cannot directly use 'struct efi_gop_mode_info info[]' here as
343 * it causes compiler to complain: array type has incomplete element
344 * type 'struct efi_gop_mode_info'.
346 struct /* efi_gop_mode_info */ {
351 u32 pixel_bitmask[4];
352 u32 pixels_per_scanline;
357 * struct efi_entry_systable - system table passed to U-Boot
359 * @sys_table: EFI system table address
361 struct efi_entry_systable {
362 efi_physical_addr_t sys_table;
365 static inline struct efi_mem_desc *efi_get_next_mem_desc(
366 struct efi_entry_memmap *map, struct efi_mem_desc *desc)
368 return (struct efi_mem_desc *)((ulong)desc + map->desc_size);
372 efi_handle_t parent_image;
373 struct efi_device_path *device_path;
374 struct efi_system_table *sys_table;
375 struct efi_boot_services *boot;
376 struct efi_runtime_services *run;
377 bool use_pool_for_malloc;
378 unsigned long ram_base;
379 unsigned int image_data_type;
380 struct efi_info_hdr *info;
381 unsigned int info_size;
385 /* Base address of the EFI image */
386 extern char image_base[];
388 /* Start and end of U-Boot image (for payload) */
389 extern char _binary_u_boot_bin_start[], _binary_u_boot_bin_end[];
392 * Variable Attributes
394 #define EFI_VARIABLE_NON_VOLATILE 0x0000000000000001
395 #define EFI_VARIABLE_BOOTSERVICE_ACCESS 0x0000000000000002
396 #define EFI_VARIABLE_RUNTIME_ACCESS 0x0000000000000004
397 #define EFI_VARIABLE_HARDWARE_ERROR_RECORD 0x0000000000000008
398 #define EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS 0x0000000000000010
399 #define EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS 0x0000000000000020
400 #define EFI_VARIABLE_APPEND_WRITE 0x0000000000000040
402 #define EFI_VARIABLE_MASK (EFI_VARIABLE_NON_VOLATILE | \
403 EFI_VARIABLE_BOOTSERVICE_ACCESS | \
404 EFI_VARIABLE_RUNTIME_ACCESS | \
405 EFI_VARIABLE_HARDWARE_ERROR_RECORD | \
406 EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS | \
407 EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS | \
408 EFI_VARIABLE_APPEND_WRITE)
411 * efi_get_sys_table() - Get access to the main EFI system table
413 * @return pointer to EFI system table
416 struct efi_system_table *efi_get_sys_table(void);
419 * efi_get_ram_base() - Find the base of RAM
421 * This is used when U-Boot is built as an EFI application.
423 * @return the base of RAM as known to U-Boot
425 unsigned long efi_get_ram_base(void);
428 * efi_init() - Set up ready for use of EFI boot services
430 * @priv: Pointer to our private EFI structure to fill in
431 * @banner: Banner to display when starting
432 * @image: The image handle passed to efi_main()
433 * @sys_table: The EFI system table pointer passed to efi_main()
435 int efi_init(struct efi_priv *priv, const char *banner, efi_handle_t image,
436 struct efi_system_table *sys_table);
439 * efi_malloc() - Allocate some memory from EFI
441 * @priv: Pointer to private EFI structure
442 * @size: Number of bytes to allocate
443 * @retp: Return EFI status result
444 * @return pointer to memory allocated, or NULL on error
446 void *efi_malloc(struct efi_priv *priv, int size, efi_status_t *retp);
449 * efi_free() - Free memory allocated from EFI
451 * @priv: Pointer to private EFI structure
452 * @ptr: Pointer to memory to free
454 void efi_free(struct efi_priv *priv, void *ptr);
457 * efi_puts() - Write out a string to the EFI console
459 * @priv: Pointer to private EFI structure
460 * @str: String to write (note this is a ASCII, not unicode)
462 void efi_puts(struct efi_priv *priv, const char *str);
465 * efi_putc() - Write out a character to the EFI console
467 * @priv: Pointer to private EFI structure
468 * @ch: Character to write (note this is not unicode)
470 void efi_putc(struct efi_priv *priv, const char ch);
473 * efi_info_get() - get an entry from an EFI table
475 * @type: Entry type to search for
476 * @datap: Returns pointer to entry data
477 * @sizep: Returns pointer to entry size
478 * @return 0 if OK, -ENODATA if there is no table, -ENOENT if there is no entry
479 * of the requested type, -EPROTONOSUPPORT if the table has the wrong version
481 int efi_info_get(enum efi_entry_t type, void **datap, int *sizep);
484 * efi_build_mem_table() - make a sorted copy of the memory table
486 * @map: Pointer to EFI memory map table
487 * @size: Size of table in bytes
488 * @skip_bs: True to skip boot-time memory and merge it with conventional
489 * memory. This will significantly reduce the number of table
491 * @return pointer to the new table. It should be freed with free() by the
494 void *efi_build_mem_table(struct efi_entry_memmap *map, int size, bool skip_bs);
496 #endif /* _LINUX_EFI_H */