xref: /linux/drivers/firmware/efi/libstub/efistub.h (revision bd4af432cc71b5fbfe4833510359a6ad3ada250d)
1 /* SPDX-License-Identifier: GPL-2.0 */
2 
3 #ifndef _DRIVERS_FIRMWARE_EFI_EFISTUB_H
4 #define _DRIVERS_FIRMWARE_EFI_EFISTUB_H
5 
6 /* error code which can't be mistaken for valid address */
7 #define EFI_ERROR	(~0UL)
8 
9 /*
10  * __init annotations should not be used in the EFI stub, since the code is
11  * either included in the decompressor (x86, ARM) where they have no effect,
12  * or the whole stub is __init annotated at the section level (arm64), by
13  * renaming the sections, in which case the __init annotation will be
14  * redundant, and will result in section names like .init.init.text, and our
15  * linker script does not expect that.
16  */
17 #undef __init
18 
19 /*
20  * Allow the platform to override the allocation granularity: this allows
21  * systems that have the capability to run with a larger page size to deal
22  * with the allocations for initrd and fdt more efficiently.
23  */
24 #ifndef EFI_ALLOC_ALIGN
25 #define EFI_ALLOC_ALIGN		EFI_PAGE_SIZE
26 #endif
27 
28 #if defined(CONFIG_ARM) || defined(CONFIG_X86)
29 #define __efistub_global	__section(.data)
30 #else
31 #define __efistub_global
32 #endif
33 
34 extern bool __pure nochunk(void);
35 extern bool __pure nokaslr(void);
36 extern bool __pure noinitrd(void);
37 extern bool __pure is_quiet(void);
38 extern bool __pure novamap(void);
39 
40 extern __pure efi_system_table_t  *efi_system_table(void);
41 
42 #define pr_efi(msg)		do {			\
43 	if (!is_quiet()) efi_printk("EFI stub: "msg);	\
44 } while (0)
45 
46 #define pr_efi_err(msg) efi_printk("EFI stub: ERROR: "msg)
47 
48 /* Helper macros for the usual case of using simple C variables: */
49 #ifndef fdt_setprop_inplace_var
50 #define fdt_setprop_inplace_var(fdt, node_offset, name, var) \
51 	fdt_setprop_inplace((fdt), (node_offset), (name), &(var), sizeof(var))
52 #endif
53 
54 #ifndef fdt_setprop_var
55 #define fdt_setprop_var(fdt, node_offset, name, var) \
56 	fdt_setprop((fdt), (node_offset), (name), &(var), sizeof(var))
57 #endif
58 
59 #define get_efi_var(name, vendor, ...)				\
60 	efi_rt_call(get_variable, (efi_char16_t *)(name),	\
61 		    (efi_guid_t *)(vendor), __VA_ARGS__)
62 
63 #define set_efi_var(name, vendor, ...)				\
64 	efi_rt_call(set_variable, (efi_char16_t *)(name),	\
65 		    (efi_guid_t *)(vendor), __VA_ARGS__)
66 
67 #define efi_get_handle_at(array, idx)					\
68 	(efi_is_native() ? (array)[idx] 				\
69 		: (efi_handle_t)(unsigned long)((u32 *)(array))[idx])
70 
71 #define efi_get_handle_num(size)					\
72 	((size) / (efi_is_native() ? sizeof(efi_handle_t) : sizeof(u32)))
73 
74 #define for_each_efi_handle(handle, array, size, i)			\
75 	for (i = 0;							\
76 	     i < efi_get_handle_num(size) &&				\
77 		((handle = efi_get_handle_at((array), i)) || true);	\
78 	     i++)
79 
80 /*
81  * Allocation types for calls to boottime->allocate_pages.
82  */
83 #define EFI_ALLOCATE_ANY_PAGES		0
84 #define EFI_ALLOCATE_MAX_ADDRESS	1
85 #define EFI_ALLOCATE_ADDRESS		2
86 #define EFI_MAX_ALLOCATE_TYPE		3
87 
88 /*
89  * The type of search to perform when calling boottime->locate_handle
90  */
91 #define EFI_LOCATE_ALL_HANDLES			0
92 #define EFI_LOCATE_BY_REGISTER_NOTIFY		1
93 #define EFI_LOCATE_BY_PROTOCOL			2
94 
95 struct efi_boot_memmap {
96 	efi_memory_desc_t	**map;
97 	unsigned long		*map_size;
98 	unsigned long		*desc_size;
99 	u32			*desc_ver;
100 	unsigned long		*key_ptr;
101 	unsigned long		*buff_size;
102 };
103 
104 typedef struct efi_generic_dev_path efi_device_path_protocol_t;
105 
106 /*
107  * EFI Boot Services table
108  */
109 union efi_boot_services {
110 	struct {
111 		efi_table_hdr_t hdr;
112 		void *raise_tpl;
113 		void *restore_tpl;
114 		efi_status_t (__efiapi *allocate_pages)(int, int, unsigned long,
115 							efi_physical_addr_t *);
116 		efi_status_t (__efiapi *free_pages)(efi_physical_addr_t,
117 						    unsigned long);
118 		efi_status_t (__efiapi *get_memory_map)(unsigned long *, void *,
119 							unsigned long *,
120 							unsigned long *, u32 *);
121 		efi_status_t (__efiapi *allocate_pool)(int, unsigned long,
122 						       void **);
123 		efi_status_t (__efiapi *free_pool)(void *);
124 		void *create_event;
125 		void *set_timer;
126 		void *wait_for_event;
127 		void *signal_event;
128 		void *close_event;
129 		void *check_event;
130 		void *install_protocol_interface;
131 		void *reinstall_protocol_interface;
132 		void *uninstall_protocol_interface;
133 		efi_status_t (__efiapi *handle_protocol)(efi_handle_t,
134 							 efi_guid_t *, void **);
135 		void *__reserved;
136 		void *register_protocol_notify;
137 		efi_status_t (__efiapi *locate_handle)(int, efi_guid_t *,
138 						       void *, unsigned long *,
139 						       efi_handle_t *);
140 		efi_status_t (__efiapi *locate_device_path)(efi_guid_t *,
141 							    efi_device_path_protocol_t **,
142 							    efi_handle_t *);
143 		efi_status_t (__efiapi *install_configuration_table)(efi_guid_t *,
144 								     void *);
145 		void *load_image;
146 		void *start_image;
147 		efi_status_t __noreturn (__efiapi *exit)(efi_handle_t,
148 							 efi_status_t,
149 							 unsigned long,
150 							 efi_char16_t *);
151 		void *unload_image;
152 		efi_status_t (__efiapi *exit_boot_services)(efi_handle_t,
153 							    unsigned long);
154 		void *get_next_monotonic_count;
155 		void *stall;
156 		void *set_watchdog_timer;
157 		void *connect_controller;
158 		efi_status_t (__efiapi *disconnect_controller)(efi_handle_t,
159 							       efi_handle_t,
160 							       efi_handle_t);
161 		void *open_protocol;
162 		void *close_protocol;
163 		void *open_protocol_information;
164 		void *protocols_per_handle;
165 		void *locate_handle_buffer;
166 		efi_status_t (__efiapi *locate_protocol)(efi_guid_t *, void *,
167 							 void **);
168 		void *install_multiple_protocol_interfaces;
169 		void *uninstall_multiple_protocol_interfaces;
170 		void *calculate_crc32;
171 		void *copy_mem;
172 		void *set_mem;
173 		void *create_event_ex;
174 	};
175 	struct {
176 		efi_table_hdr_t hdr;
177 		u32 raise_tpl;
178 		u32 restore_tpl;
179 		u32 allocate_pages;
180 		u32 free_pages;
181 		u32 get_memory_map;
182 		u32 allocate_pool;
183 		u32 free_pool;
184 		u32 create_event;
185 		u32 set_timer;
186 		u32 wait_for_event;
187 		u32 signal_event;
188 		u32 close_event;
189 		u32 check_event;
190 		u32 install_protocol_interface;
191 		u32 reinstall_protocol_interface;
192 		u32 uninstall_protocol_interface;
193 		u32 handle_protocol;
194 		u32 __reserved;
195 		u32 register_protocol_notify;
196 		u32 locate_handle;
197 		u32 locate_device_path;
198 		u32 install_configuration_table;
199 		u32 load_image;
200 		u32 start_image;
201 		u32 exit;
202 		u32 unload_image;
203 		u32 exit_boot_services;
204 		u32 get_next_monotonic_count;
205 		u32 stall;
206 		u32 set_watchdog_timer;
207 		u32 connect_controller;
208 		u32 disconnect_controller;
209 		u32 open_protocol;
210 		u32 close_protocol;
211 		u32 open_protocol_information;
212 		u32 protocols_per_handle;
213 		u32 locate_handle_buffer;
214 		u32 locate_protocol;
215 		u32 install_multiple_protocol_interfaces;
216 		u32 uninstall_multiple_protocol_interfaces;
217 		u32 calculate_crc32;
218 		u32 copy_mem;
219 		u32 set_mem;
220 		u32 create_event_ex;
221 	} mixed_mode;
222 };
223 
224 typedef union efi_uga_draw_protocol efi_uga_draw_protocol_t;
225 
226 union efi_uga_draw_protocol {
227 	struct {
228 		efi_status_t (__efiapi *get_mode)(efi_uga_draw_protocol_t *,
229 						  u32*, u32*, u32*, u32*);
230 		void *set_mode;
231 		void *blt;
232 	};
233 	struct {
234 		u32 get_mode;
235 		u32 set_mode;
236 		u32 blt;
237 	} mixed_mode;
238 };
239 
240 union efi_simple_text_output_protocol {
241 	struct {
242 		void *reset;
243 		efi_status_t (__efiapi *output_string)(efi_simple_text_output_protocol_t *,
244 						       efi_char16_t *);
245 		void *test_string;
246 	};
247 	struct {
248 		u32 reset;
249 		u32 output_string;
250 		u32 test_string;
251 	} mixed_mode;
252 };
253 
254 #define PIXEL_RGB_RESERVED_8BIT_PER_COLOR		0
255 #define PIXEL_BGR_RESERVED_8BIT_PER_COLOR		1
256 #define PIXEL_BIT_MASK					2
257 #define PIXEL_BLT_ONLY					3
258 #define PIXEL_FORMAT_MAX				4
259 
260 typedef struct {
261 	u32 red_mask;
262 	u32 green_mask;
263 	u32 blue_mask;
264 	u32 reserved_mask;
265 } efi_pixel_bitmask_t;
266 
267 typedef struct {
268 	u32 version;
269 	u32 horizontal_resolution;
270 	u32 vertical_resolution;
271 	int pixel_format;
272 	efi_pixel_bitmask_t pixel_information;
273 	u32 pixels_per_scan_line;
274 } efi_graphics_output_mode_info_t;
275 
276 typedef union efi_graphics_output_protocol_mode efi_graphics_output_protocol_mode_t;
277 
278 union efi_graphics_output_protocol_mode {
279 	struct {
280 		u32 max_mode;
281 		u32 mode;
282 		efi_graphics_output_mode_info_t *info;
283 		unsigned long size_of_info;
284 		efi_physical_addr_t frame_buffer_base;
285 		unsigned long frame_buffer_size;
286 	};
287 	struct {
288 		u32 max_mode;
289 		u32 mode;
290 		u32 info;
291 		u32 size_of_info;
292 		u64 frame_buffer_base;
293 		u32 frame_buffer_size;
294 	} mixed_mode;
295 };
296 
297 typedef union efi_graphics_output_protocol efi_graphics_output_protocol_t;
298 
299 union efi_graphics_output_protocol {
300 	struct {
301 		void *query_mode;
302 		void *set_mode;
303 		void *blt;
304 		efi_graphics_output_protocol_mode_t *mode;
305 	};
306 	struct {
307 		u32 query_mode;
308 		u32 set_mode;
309 		u32 blt;
310 		u32 mode;
311 	} mixed_mode;
312 };
313 
314 typedef union {
315 	struct {
316 		u32			revision;
317 		efi_handle_t		parent_handle;
318 		efi_system_table_t	*system_table;
319 		efi_handle_t		device_handle;
320 		void			*file_path;
321 		void			*reserved;
322 		u32			load_options_size;
323 		void			*load_options;
324 		void			*image_base;
325 		__aligned_u64		image_size;
326 		unsigned int		image_code_type;
327 		unsigned int		image_data_type;
328 		efi_status_t		(__efiapi *unload)(efi_handle_t image_handle);
329 	};
330 	struct {
331 		u32		revision;
332 		u32		parent_handle;
333 		u32		system_table;
334 		u32		device_handle;
335 		u32		file_path;
336 		u32		reserved;
337 		u32		load_options_size;
338 		u32		load_options;
339 		u32		image_base;
340 		__aligned_u64	image_size;
341 		u32		image_code_type;
342 		u32		image_data_type;
343 		u32		unload;
344 	} mixed_mode;
345 } efi_loaded_image_t;
346 
347 typedef struct {
348 	u64			size;
349 	u64			file_size;
350 	u64			phys_size;
351 	efi_time_t		create_time;
352 	efi_time_t		last_access_time;
353 	efi_time_t		modification_time;
354 	__aligned_u64		attribute;
355 	efi_char16_t		filename[];
356 } efi_file_info_t;
357 
358 typedef struct efi_file_protocol efi_file_protocol_t;
359 
360 struct efi_file_protocol {
361 	u64		revision;
362 	efi_status_t	(__efiapi *open)	(efi_file_protocol_t *,
363 						 efi_file_protocol_t **,
364 						 efi_char16_t *, u64, u64);
365 	efi_status_t	(__efiapi *close)	(efi_file_protocol_t *);
366 	efi_status_t	(__efiapi *delete)	(efi_file_protocol_t *);
367 	efi_status_t	(__efiapi *read)	(efi_file_protocol_t *,
368 						 unsigned long *, void *);
369 	efi_status_t	(__efiapi *write)	(efi_file_protocol_t *,
370 						 unsigned long, void *);
371 	efi_status_t	(__efiapi *get_position)(efi_file_protocol_t *, u64 *);
372 	efi_status_t	(__efiapi *set_position)(efi_file_protocol_t *, u64);
373 	efi_status_t	(__efiapi *get_info)	(efi_file_protocol_t *,
374 						 efi_guid_t *, unsigned long *,
375 						 void *);
376 	efi_status_t	(__efiapi *set_info)	(efi_file_protocol_t *,
377 						 efi_guid_t *, unsigned long,
378 						 void *);
379 	efi_status_t	(__efiapi *flush)	(efi_file_protocol_t *);
380 };
381 
382 typedef struct efi_simple_file_system_protocol efi_simple_file_system_protocol_t;
383 
384 struct efi_simple_file_system_protocol {
385 	u64	revision;
386 	int	(__efiapi *open_volume)(efi_simple_file_system_protocol_t *,
387 					efi_file_protocol_t **);
388 };
389 
390 #define EFI_FILE_MODE_READ	0x0000000000000001
391 #define EFI_FILE_MODE_WRITE	0x0000000000000002
392 #define EFI_FILE_MODE_CREATE	0x8000000000000000
393 
394 typedef enum {
395 	EfiPciIoWidthUint8,
396 	EfiPciIoWidthUint16,
397 	EfiPciIoWidthUint32,
398 	EfiPciIoWidthUint64,
399 	EfiPciIoWidthFifoUint8,
400 	EfiPciIoWidthFifoUint16,
401 	EfiPciIoWidthFifoUint32,
402 	EfiPciIoWidthFifoUint64,
403 	EfiPciIoWidthFillUint8,
404 	EfiPciIoWidthFillUint16,
405 	EfiPciIoWidthFillUint32,
406 	EfiPciIoWidthFillUint64,
407 	EfiPciIoWidthMaximum
408 } EFI_PCI_IO_PROTOCOL_WIDTH;
409 
410 typedef enum {
411 	EfiPciIoAttributeOperationGet,
412 	EfiPciIoAttributeOperationSet,
413 	EfiPciIoAttributeOperationEnable,
414 	EfiPciIoAttributeOperationDisable,
415 	EfiPciIoAttributeOperationSupported,
416     EfiPciIoAttributeOperationMaximum
417 } EFI_PCI_IO_PROTOCOL_ATTRIBUTE_OPERATION;
418 
419 typedef struct {
420 	u32 read;
421 	u32 write;
422 } efi_pci_io_protocol_access_32_t;
423 
424 typedef union efi_pci_io_protocol efi_pci_io_protocol_t;
425 
426 typedef
427 efi_status_t (__efiapi *efi_pci_io_protocol_cfg_t)(efi_pci_io_protocol_t *,
428 						   EFI_PCI_IO_PROTOCOL_WIDTH,
429 						   u32 offset,
430 						   unsigned long count,
431 						   void *buffer);
432 
433 typedef struct {
434 	void *read;
435 	void *write;
436 } efi_pci_io_protocol_access_t;
437 
438 typedef struct {
439 	efi_pci_io_protocol_cfg_t read;
440 	efi_pci_io_protocol_cfg_t write;
441 } efi_pci_io_protocol_config_access_t;
442 
443 union efi_pci_io_protocol {
444 	struct {
445 		void *poll_mem;
446 		void *poll_io;
447 		efi_pci_io_protocol_access_t mem;
448 		efi_pci_io_protocol_access_t io;
449 		efi_pci_io_protocol_config_access_t pci;
450 		void *copy_mem;
451 		void *map;
452 		void *unmap;
453 		void *allocate_buffer;
454 		void *free_buffer;
455 		void *flush;
456 		efi_status_t (__efiapi *get_location)(efi_pci_io_protocol_t *,
457 						      unsigned long *segment_nr,
458 						      unsigned long *bus_nr,
459 						      unsigned long *device_nr,
460 						      unsigned long *func_nr);
461 		void *attributes;
462 		void *get_bar_attributes;
463 		void *set_bar_attributes;
464 		uint64_t romsize;
465 		void *romimage;
466 	};
467 	struct {
468 		u32 poll_mem;
469 		u32 poll_io;
470 		efi_pci_io_protocol_access_32_t mem;
471 		efi_pci_io_protocol_access_32_t io;
472 		efi_pci_io_protocol_access_32_t pci;
473 		u32 copy_mem;
474 		u32 map;
475 		u32 unmap;
476 		u32 allocate_buffer;
477 		u32 free_buffer;
478 		u32 flush;
479 		u32 get_location;
480 		u32 attributes;
481 		u32 get_bar_attributes;
482 		u32 set_bar_attributes;
483 		u64 romsize;
484 		u32 romimage;
485 	} mixed_mode;
486 };
487 
488 #define EFI_PCI_IO_ATTRIBUTE_ISA_MOTHERBOARD_IO 0x0001
489 #define EFI_PCI_IO_ATTRIBUTE_ISA_IO 0x0002
490 #define EFI_PCI_IO_ATTRIBUTE_VGA_PALETTE_IO 0x0004
491 #define EFI_PCI_IO_ATTRIBUTE_VGA_MEMORY 0x0008
492 #define EFI_PCI_IO_ATTRIBUTE_VGA_IO 0x0010
493 #define EFI_PCI_IO_ATTRIBUTE_IDE_PRIMARY_IO 0x0020
494 #define EFI_PCI_IO_ATTRIBUTE_IDE_SECONDARY_IO 0x0040
495 #define EFI_PCI_IO_ATTRIBUTE_MEMORY_WRITE_COMBINE 0x0080
496 #define EFI_PCI_IO_ATTRIBUTE_IO 0x0100
497 #define EFI_PCI_IO_ATTRIBUTE_MEMORY 0x0200
498 #define EFI_PCI_IO_ATTRIBUTE_BUS_MASTER 0x0400
499 #define EFI_PCI_IO_ATTRIBUTE_MEMORY_CACHED 0x0800
500 #define EFI_PCI_IO_ATTRIBUTE_MEMORY_DISABLE 0x1000
501 #define EFI_PCI_IO_ATTRIBUTE_EMBEDDED_DEVICE 0x2000
502 #define EFI_PCI_IO_ATTRIBUTE_EMBEDDED_ROM 0x4000
503 #define EFI_PCI_IO_ATTRIBUTE_DUAL_ADDRESS_CYCLE 0x8000
504 #define EFI_PCI_IO_ATTRIBUTE_ISA_IO_16 0x10000
505 #define EFI_PCI_IO_ATTRIBUTE_VGA_PALETTE_IO_16 0x20000
506 #define EFI_PCI_IO_ATTRIBUTE_VGA_IO_16 0x40000
507 
508 struct efi_dev_path;
509 
510 typedef union apple_properties_protocol apple_properties_protocol_t;
511 
512 union apple_properties_protocol {
513 	struct {
514 		unsigned long version;
515 		efi_status_t (__efiapi *get)(apple_properties_protocol_t *,
516 					     struct efi_dev_path *,
517 					     efi_char16_t *, void *, u32 *);
518 		efi_status_t (__efiapi *set)(apple_properties_protocol_t *,
519 					     struct efi_dev_path *,
520 					     efi_char16_t *, void *, u32);
521 		efi_status_t (__efiapi *del)(apple_properties_protocol_t *,
522 					     struct efi_dev_path *,
523 					     efi_char16_t *);
524 		efi_status_t (__efiapi *get_all)(apple_properties_protocol_t *,
525 						 void *buffer, u32 *);
526 	};
527 	struct {
528 		u32 version;
529 		u32 get;
530 		u32 set;
531 		u32 del;
532 		u32 get_all;
533 	} mixed_mode;
534 };
535 
536 typedef u32 efi_tcg2_event_log_format;
537 
538 typedef union efi_tcg2_protocol efi_tcg2_protocol_t;
539 
540 union efi_tcg2_protocol {
541 	struct {
542 		void *get_capability;
543 		efi_status_t (__efiapi *get_event_log)(efi_handle_t,
544 						       efi_tcg2_event_log_format,
545 						       efi_physical_addr_t *,
546 						       efi_physical_addr_t *,
547 						       efi_bool_t *);
548 		void *hash_log_extend_event;
549 		void *submit_command;
550 		void *get_active_pcr_banks;
551 		void *set_active_pcr_banks;
552 		void *get_result_of_set_active_pcr_banks;
553 	};
554 	struct {
555 		u32 get_capability;
556 		u32 get_event_log;
557 		u32 hash_log_extend_event;
558 		u32 submit_command;
559 		u32 get_active_pcr_banks;
560 		u32 set_active_pcr_banks;
561 		u32 get_result_of_set_active_pcr_banks;
562 	} mixed_mode;
563 };
564 
565 typedef union efi_load_file_protocol efi_load_file_protocol_t;
566 typedef union efi_load_file_protocol efi_load_file2_protocol_t;
567 
568 union efi_load_file_protocol {
569 	struct {
570 		efi_status_t (__efiapi *load_file)(efi_load_file_protocol_t *,
571 						   efi_device_path_protocol_t *,
572 						   bool, unsigned long *, void *);
573 	};
574 	struct {
575 		u32 load_file;
576 	} mixed_mode;
577 };
578 
579 void efi_pci_disable_bridge_busmaster(void);
580 
581 typedef efi_status_t (*efi_exit_boot_map_processing)(
582 	struct efi_boot_memmap *map,
583 	void *priv);
584 
585 efi_status_t efi_exit_boot_services(void *handle,
586 				    struct efi_boot_memmap *map,
587 				    void *priv,
588 				    efi_exit_boot_map_processing priv_func);
589 
590 void efi_char16_printk(efi_char16_t *);
591 
592 efi_status_t allocate_new_fdt_and_exit_boot(void *handle,
593 					    unsigned long *new_fdt_addr,
594 					    unsigned long max_addr,
595 					    u64 initrd_addr, u64 initrd_size,
596 					    char *cmdline_ptr,
597 					    unsigned long fdt_addr,
598 					    unsigned long fdt_size);
599 
600 void *get_fdt(unsigned long *fdt_size);
601 
602 void efi_get_virtmap(efi_memory_desc_t *memory_map, unsigned long map_size,
603 		     unsigned long desc_size, efi_memory_desc_t *runtime_map,
604 		     int *count);
605 
606 efi_status_t efi_get_random_bytes(unsigned long size, u8 *out);
607 
608 efi_status_t efi_random_alloc(unsigned long size, unsigned long align,
609 			      unsigned long *addr, unsigned long random_seed);
610 
611 efi_status_t check_platform_features(void);
612 
613 void *get_efi_config_table(efi_guid_t guid);
614 
615 void efi_printk(char *str);
616 
617 void efi_free(unsigned long size, unsigned long addr);
618 
619 char *efi_convert_cmdline(efi_loaded_image_t *image, int *cmd_line_len,
620 			  unsigned long max_addr);
621 
622 efi_status_t efi_get_memory_map(struct efi_boot_memmap *map);
623 
624 efi_status_t efi_low_alloc_above(unsigned long size, unsigned long align,
625 				 unsigned long *addr, unsigned long min);
626 
627 static inline
628 efi_status_t efi_low_alloc(unsigned long size, unsigned long align,
629 			   unsigned long *addr)
630 {
631 	/*
632 	 * Don't allocate at 0x0. It will confuse code that
633 	 * checks pointers against NULL. Skip the first 8
634 	 * bytes so we start at a nice even number.
635 	 */
636 	return efi_low_alloc_above(size, align, addr, 0x8);
637 }
638 
639 efi_status_t efi_allocate_pages(unsigned long size, unsigned long *addr,
640 				unsigned long max);
641 
642 efi_status_t efi_relocate_kernel(unsigned long *image_addr,
643 				 unsigned long image_size,
644 				 unsigned long alloc_size,
645 				 unsigned long preferred_addr,
646 				 unsigned long alignment,
647 				 unsigned long min_addr);
648 
649 efi_status_t efi_parse_options(char const *cmdline);
650 
651 efi_status_t efi_setup_gop(struct screen_info *si, efi_guid_t *proto,
652 			   unsigned long size);
653 
654 efi_status_t efi_load_dtb(efi_loaded_image_t *image,
655 			  unsigned long *load_addr,
656 			  unsigned long *load_size);
657 
658 efi_status_t efi_load_initrd(efi_loaded_image_t *image,
659 			     unsigned long *load_addr,
660 			     unsigned long *load_size,
661 			     unsigned long soft_limit,
662 			     unsigned long hard_limit);
663 
664 efi_status_t efi_load_initrd_dev_path(unsigned long *load_addr,
665 				      unsigned long *load_size,
666 				      unsigned long max);
667 
668 #endif
669