2 * Extensible Firmware Interface
3 * Based on 'Extensible Firmware Interface Specification' version 0.9,
6 * Copyright (C) 1999 VA Linux Systems
7 * Copyright (C) 1999 Walt Drummond <drummond@valinux.com>
8 * Copyright (C) 1999, 2002-2003 Hewlett-Packard Co.
9 * David Mosberger-Tang <davidm@hpl.hp.com>
10 * Stephane Eranian <eranian@hpl.hp.com>
12 * From include/linux/efi.h in kernel 4.1 with some additions/subtractions
18 #include <linux/string.h>
19 #include <linux/types.h>
21 #ifdef CONFIG_EFI_STUB_64BIT
22 /* EFI uses the Microsoft ABI which is not the default for GCC */
23 #define EFIAPI __attribute__((ms_abi))
28 struct efi_device_path;
31 #define EFI_LOAD_ERROR (1 | (1UL << (BITS_PER_LONG - 1)))
32 #define EFI_INVALID_PARAMETER (2 | (1UL << (BITS_PER_LONG - 1)))
33 #define EFI_UNSUPPORTED (3 | (1UL << (BITS_PER_LONG - 1)))
34 #define EFI_BAD_BUFFER_SIZE (4 | (1UL << (BITS_PER_LONG - 1)))
35 #define EFI_BUFFER_TOO_SMALL (5 | (1UL << (BITS_PER_LONG - 1)))
36 #define EFI_NOT_READY (6 | (1UL << (BITS_PER_LONG - 1)))
37 #define EFI_DEVICE_ERROR (7 | (1UL << (BITS_PER_LONG - 1)))
38 #define EFI_WRITE_PROTECTED (8 | (1UL << (BITS_PER_LONG - 1)))
39 #define EFI_OUT_OF_RESOURCES (9 | (1UL << (BITS_PER_LONG - 1)))
40 #define EFI_NOT_FOUND (14 | (1UL << (BITS_PER_LONG - 1)))
41 #define EFI_ACCESS_DENIED (15 | (1UL << (BITS_PER_LONG - 1)))
42 #define EFI_SECURITY_VIOLATION (26 | (1UL << (BITS_PER_LONG - 1)))
44 typedef unsigned long efi_status_t;
45 typedef u64 efi_physical_addr_t;
46 typedef u64 efi_virtual_addr_t;
47 typedef void *efi_handle_t;
49 #define EFI_GUID(a, b, c, d0, d1, d2, d3, d4, d5, d6, d7) \
51 {{ (a) & 0xff, ((a) >> 8) & 0xff, ((a) >> 16) & 0xff, \
53 (b) & 0xff, ((b) >> 8) & 0xff, \
54 (c) & 0xff, ((c) >> 8) & 0xff, \
55 (d0), (d1), (d2), (d3), (d4), (d5), (d6), (d7) } })
57 /* Generic EFI table header */
58 struct efi_table_hdr {
66 /* Enumeration of memory types introduced in UEFI */
68 EFI_RESERVED_MEMORY_TYPE,
70 * The code portions of a loaded application.
71 * (Note that UEFI OS loaders are UEFI applications.)
75 * The data portions of a loaded application and
76 * the default data allocation type used by an application
77 * to allocate pool memory.
80 /* The code portions of a loaded Boot Services Driver */
81 EFI_BOOT_SERVICES_CODE,
83 * The data portions of a loaded Boot Serves Driver and
84 * the default data allocation type used by a Boot Services
85 * Driver to allocate pool memory.
87 EFI_BOOT_SERVICES_DATA,
88 /* The code portions of a loaded Runtime Services Driver */
89 EFI_RUNTIME_SERVICES_CODE,
91 * The data portions of a loaded Runtime Services Driver and
92 * the default data allocation type used by a Runtime Services
93 * Driver to allocate pool memory.
95 EFI_RUNTIME_SERVICES_DATA,
96 /* Free (unallocated) memory */
97 EFI_CONVENTIONAL_MEMORY,
98 /* Memory in which errors have been detected */
100 /* Memory that holds the ACPI tables */
101 EFI_ACPI_RECLAIM_MEMORY,
102 /* Address space reserved for use by the firmware */
105 * Used by system firmware to request that a memory-mapped IO region
106 * be mapped by the OS to a virtual address so it can be accessed by
107 * EFI runtime services.
111 * System memory-mapped IO region that is used to translate
112 * memory cycles to IO cycles by the processor.
116 * Address space reserved by the firmware for code that is
117 * part of the processor.
122 EFI_TABLE_END, /* For efi_build_mem_table() */
125 /* Attribute values */
127 EFI_MEMORY_UC_SHIFT = 0, /* uncached */
128 EFI_MEMORY_WC_SHIFT = 1, /* write-coalescing */
129 EFI_MEMORY_WT_SHIFT = 2, /* write-through */
130 EFI_MEMORY_WB_SHIFT = 3, /* write-back */
131 EFI_MEMORY_UCE_SHIFT = 4, /* uncached, exported */
132 EFI_MEMORY_WP_SHIFT = 12, /* write-protect */
133 EFI_MEMORY_RP_SHIFT = 13, /* read-protect */
134 EFI_MEMORY_XP_SHIFT = 14, /* execute-protect */
135 EFI_MEMORY_RUNTIME_SHIFT = 63, /* range requires runtime mapping */
137 EFI_MEMORY_RUNTIME = 1ULL << EFI_MEMORY_RUNTIME_SHIFT,
138 EFI_MEM_DESC_VERSION = 1,
141 #define EFI_PAGE_SHIFT 12
142 #define EFI_PAGE_SIZE (1UL << EFI_PAGE_SHIFT)
143 #define EFI_PAGE_MASK (EFI_PAGE_SIZE - 1)
145 struct efi_mem_desc {
148 efi_physical_addr_t physical_start;
149 efi_virtual_addr_t virtual_start;
154 /* Allocation types for calls to boottime->allocate_pages*/
155 #define EFI_ALLOCATE_ANY_PAGES 0
156 #define EFI_ALLOCATE_MAX_ADDRESS 1
157 #define EFI_ALLOCATE_ADDRESS 2
158 #define EFI_MAX_ALLOCATE_TYPE 3
160 /* Types and defines for Time Services */
161 #define EFI_TIME_ADJUST_DAYLIGHT 0x1
162 #define EFI_TIME_IN_DAYLIGHT 0x2
163 #define EFI_UNSPECIFIED_TIMEZONE 0x07ff
179 struct efi_time_cap {
185 enum efi_locate_search_type {
191 struct efi_open_protocol_info_entry {
192 efi_handle_t agent_handle;
193 efi_handle_t controller_handle;
199 EFIET_END, /* Signals this is the last (empty) entry */
202 /* Number of entries */
206 #define EFI_TABLE_VERSION 1
209 * struct efi_info_hdr - Header for the EFI info table
211 * @version: EFI_TABLE_VERSION
212 * @hdr_size: Size of this struct in bytes
213 * @total_size: Total size of this header plus following data
214 * @spare: Spare space for expansion
216 struct efi_info_hdr {
224 * struct efi_entry_hdr - Header for a table entry
226 * @type: enum eft_entry_t
227 * @size size of entry bytes excluding header and padding
228 * @addr: address of this entry (0 if it follows the header )
229 * @link: size of entry including header and padding
230 * @spare1: Spare space for expansion
231 * @spare2: Spare space for expansion
233 struct efi_entry_hdr {
243 * struct efi_entry_memmap - a memory map table passed to U-Boot
245 * @version: EFI's memory map table version
246 * @desc_size: EFI's size of each memory descriptor
247 * @spare: Spare space for expansion
248 * @desc: An array of descriptors, each @desc_size bytes apart
250 struct efi_entry_memmap {
254 struct efi_mem_desc desc[];
257 static inline struct efi_mem_desc *efi_get_next_mem_desc(
258 struct efi_entry_memmap *map, struct efi_mem_desc *desc)
260 return (struct efi_mem_desc *)((ulong)desc + map->desc_size);
264 efi_handle_t parent_image;
265 struct efi_device_path *device_path;
266 struct efi_system_table *sys_table;
267 struct efi_boot_services *boot;
268 struct efi_runtime_services *run;
269 bool use_pool_for_malloc;
270 unsigned long ram_base;
271 unsigned int image_data_type;
272 struct efi_info_hdr *info;
273 unsigned int info_size;
277 /* Base address of the EFI image */
278 extern char image_base[];
280 /* Start and end of U-Boot image (for payload) */
281 extern char _binary_u_boot_dtb_bin_start[], _binary_u_boot_dtb_bin_end[];
284 * efi_get_sys_table() - Get access to the main EFI system table
286 * @return pointer to EFI system table
289 struct efi_system_table *efi_get_sys_table(void);
292 * efi_get_ram_base() - Find the base of RAM
294 * This is used when U-Boot is built as an EFI application.
296 * @return the base of RAM as known to U-Boot
298 unsigned long efi_get_ram_base(void);
301 * efi_init() - Set up ready for use of EFI boot services
303 * @priv: Pointer to our private EFI structure to fill in
304 * @banner: Banner to display when starting
305 * @image: The image handle passed to efi_main()
306 * @sys_table: The EFI system table pointer passed to efi_main()
308 int efi_init(struct efi_priv *priv, const char *banner, efi_handle_t image,
309 struct efi_system_table *sys_table);
312 * efi_malloc() - Allocate some memory from EFI
314 * @priv: Pointer to private EFI structure
315 * @size: Number of bytes to allocate
316 * @retp: Return EFI status result
317 * @return pointer to memory allocated, or NULL on error
319 void *efi_malloc(struct efi_priv *priv, int size, efi_status_t *retp);
322 * efi_free() - Free memory allocated from EFI
324 * @priv: Pointer to private EFI structure
325 * @ptr: Pointer to memory to free
327 void efi_free(struct efi_priv *priv, void *ptr);
330 * efi_puts() - Write out a string to the EFI console
332 * @priv: Pointer to private EFI structure
333 * @str: String to write (note this is a ASCII, not unicode)
335 void efi_puts(struct efi_priv *priv, const char *str);
338 * efi_putc() - Write out a character to the EFI console
340 * @priv: Pointer to private EFI structure
341 * @ch: Character to write (note this is not unicode)
343 void efi_putc(struct efi_priv *priv, const char ch);
346 * efi_info_get() - get an entry from an EFI table
348 * @type: Entry type to search for
349 * @datap: Returns pointer to entry data
350 * @sizep: Returns pointer to entry size
351 * @return 0 if OK, -ENODATA if there is no table, -ENOENT if there is no entry
352 * of the requested type, -EPROTONOSUPPORT if the table has the wrong version
354 int efi_info_get(enum efi_entry_t type, void **datap, int *sizep);
357 * efi_build_mem_table() - make a sorted copy of the memory table
359 * @map: Pointer to EFI memory map table
360 * @size: Size of table in bytes
361 * @skip_bs: True to skip boot-time memory and merge it with conventional
362 * memory. This will significantly reduce the number of table
364 * @return pointer to the new table. It should be freed with free() by the
367 void *efi_build_mem_table(struct efi_entry_memmap *map, int size, bool skip_bs);
369 #endif /* _LINUX_EFI_H */