[u-boot.git] / include / efi.h

/*
 * Extensible Firmware Interface
 * Based on 'Extensible Firmware Interface Specification' version 0.9,
 * April 30, 1999
 *
 * Copyright (C) 1999 VA Linux Systems
 * Copyright (C) 1999 Walt Drummond <[email protected]>
 * Copyright (C) 1999, 2002-2003 Hewlett-Packard Co.
 *	David Mosberger-Tang <[email protected]>
 *	Stephane Eranian <[email protected]>
 *
 * From include/linux/efi.h in kernel 4.1 with some additions/subtractions
 */

#ifndef _EFI_H
#define _EFI_H

#include <linux/string.h>
#include <linux/types.h>

struct efi_device_path;

#define EFI_SUCCESS		0
#define EFI_LOAD_ERROR		(1 | (1UL << (BITS_PER_LONG - 1)))
#define EFI_INVALID_PARAMETER	(2 | (1UL << (BITS_PER_LONG - 1)))
#define EFI_UNSUPPORTED		(3 | (1UL << (BITS_PER_LONG - 1)))
#define EFI_BAD_BUFFER_SIZE	(4 | (1UL << (BITS_PER_LONG - 1)))
#define EFI_BUFFER_TOO_SMALL	(5 | (1UL << (BITS_PER_LONG - 1)))
#define EFI_NOT_READY		(6 | (1UL << (BITS_PER_LONG - 1)))
#define EFI_DEVICE_ERROR	(7 | (1UL << (BITS_PER_LONG - 1)))
#define EFI_WRITE_PROTECTED	(8 | (1UL << (BITS_PER_LONG - 1)))
#define EFI_OUT_OF_RESOURCES	(9 | (1UL << (BITS_PER_LONG - 1)))
#define EFI_NOT_FOUND		(14 | (1UL << (BITS_PER_LONG - 1)))
#define EFI_SECURITY_VIOLATION	(26 | (1UL << (BITS_PER_LONG - 1)))

typedef unsigned long efi_status_t;
typedef u64 efi_physical_addr_t;
typedef u64 efi_virtual_addr_t;
typedef void *efi_handle_t;

#define EFI_GUID(a, b, c, d0, d1, d2, d3, d4, d5, d6, d7) \
	((efi_guid_t) \
	{{ (a) & 0xff, ((a) >> 8) & 0xff, ((a) >> 16) & 0xff, \
		((a) >> 24) & 0xff, \
		(b) & 0xff, ((b) >> 8) & 0xff, \
		(c) & 0xff, ((c) >> 8) & 0xff, \
		(d0), (d1), (d2), (d3), (d4), (d5), (d6), (d7) } })

/* Generic EFI table header */
struct efi_table_hdr {
	u64 signature;
	u32 revision;
	u32 headersize;
	u32 crc32;
	u32 reserved;
};

/* Enumeration of memory types introduced in UEFI */
enum efi_mem_type {
	EFI_RESERVED_MEMORY_TYPE,
	/*
	 * The code portions of a loaded application.
	 * (Note that UEFI OS loaders are UEFI applications.)
	 */
	EFI_LOADER_CODE,
	/*
	 * The data portions of a loaded application and
	 * the default data allocation type used by an application
	 * to allocate pool memory.
	 */
	EFI_LOADER_DATA,
	/* The code portions of a loaded Boot Services Driver */
	EFI_BOOT_SERVICES_CODE,
	/*
	 * The data portions of a loaded Boot Serves Driver and
	 * the default data allocation type used by a Boot Services
	 * Driver to allocate pool memory.
	 */
	EFI_BOOT_SERVICES_DATA,
	/* The code portions of a loaded Runtime Services Driver */
	EFI_RUNTIME_SERVICES_CODE,
	/*
	 * The data portions of a loaded Runtime Services Driver and
	 * the default data allocation type used by a Runtime Services
	 * Driver to allocate pool memory.
	 */
	EFI_RUNTIME_SERVICES_DATA,
	/* Free (unallocated) memory */
	EFI_CONVENTIONAL_MEMORY,
	/* Memory in which errors have been detected */
	EFI_UNUSABLE_MEMORY,
	/* Memory that holds the ACPI tables */
	EFI_ACPI_RECLAIM_MEMORY,
	/* Address space reserved for use by the firmware */
	EFI_ACPI_MEMORY_NVS,
	/*
	 * Used by system firmware to request that a memory-mapped IO region
	 * be mapped by the OS to a virtual address so it can be accessed by
	 * EFI runtime services.
	 */
	EFI_MMAP_IO,
	/*
	 * System memory-mapped IO region that is used to translate
	 * memory cycles to IO cycles by the processor.
	 */
	EFI_MMAP_IO_PORT,
	/*
	 * Address space reserved by the firmware for code that is
	 * part of the processor.
	 */
	EFI_PAL_CODE,

	EFI_MAX_MEMORY_TYPE,
	EFI_TABLE_END,	/* For efi_build_mem_table() */
};

/* Attribute values */
enum {
	EFI_MEMORY_UC_SHIFT	= 0,	/* uncached */
	EFI_MEMORY_WC_SHIFT	= 1,	/* write-coalescing */
	EFI_MEMORY_WT_SHIFT	= 2,	/* write-through */
	EFI_MEMORY_WB_SHIFT	= 3,	/* write-back */
	EFI_MEMORY_UCE_SHIFT	= 4,	/* uncached, exported */
	EFI_MEMORY_WP_SHIFT	= 12,	/* write-protect */
	EFI_MEMORY_RP_SHIFT	= 13,	/* read-protect */
	EFI_MEMORY_XP_SHIFT	= 14,	/* execute-protect */
	EFI_MEMORY_RUNTIME_SHIFT = 63,	/* range requires runtime mapping */

	EFI_MEMORY_RUNTIME = 1ULL << EFI_MEMORY_RUNTIME_SHIFT,
	EFI_MEM_DESC_VERSION	= 1,
};

#define EFI_PAGE_SHIFT		12
#define EFI_PAGE_SIZE		(1UL << EFI_PAGE_SHIFT)

struct efi_mem_desc {
	u32 type;
	u32 reserved;
	efi_physical_addr_t physical_start;
	efi_virtual_addr_t virtual_start;
	u64 num_pages;
	u64 attribute;
};

/* Allocation types for calls to boottime->allocate_pages*/
#define EFI_ALLOCATE_ANY_PAGES		0
#define EFI_ALLOCATE_MAX_ADDRESS	1
#define EFI_ALLOCATE_ADDRESS		2
#define EFI_MAX_ALLOCATE_TYPE		3

/* Types and defines for Time Services */
#define EFI_TIME_ADJUST_DAYLIGHT 0x1
#define EFI_TIME_IN_DAYLIGHT     0x2
#define EFI_UNSPECIFIED_TIMEZONE 0x07ff

struct efi_time {
	u16 year;
	u8 month;
	u8 day;
	u8 hour;
	u8 minute;
	u8 second;
	u8 pad1;
	u32 nanosecond;
	s16 timezone;
	u8 daylight;
	u8 pad2;
};

struct efi_time_cap {
	u32 resolution;
	u32 accuracy;
	u8 sets_to_zero;
};

enum efi_locate_search_type {
	all_handles,
	by_register_notify,
	by_protocol
};

struct efi_open_protocol_info_entry {
	efi_handle_t agent_handle;
	efi_handle_t controller_handle;
	u32 attributes;
	u32 open_count;
};

enum efi_entry_t {
	EFIET_END,	/* Signals this is the last (empty) entry */
	EFIET_MEMORY_MAP,

	/* Number of entries */
	EFIET_MEMORY_COUNT,
};

#define EFI_TABLE_VERSION	1

/**
 * struct efi_info_hdr - Header for the EFI info table
 *
 * @version:	EFI_TABLE_VERSION
 * @hdr_size:	Size of this struct in bytes
 * @total_size:	Total size of this header plus following data
 * @spare:	Spare space for expansion
 */
struct efi_info_hdr {
	u32 version;
	u32 hdr_size;
	u32 total_size;
	u32 spare[5];
};

/**
 * struct efi_entry_hdr - Header for a table entry
 *
 * @type:	enum eft_entry_t
 * @size	size of entry bytes excluding header and padding
 * @addr:	address of this entry (0 if it follows the header )
 * @link:	size of entry including header and padding
 * @spare1:	Spare space for expansion
 * @spare2:	Spare space for expansion
 */
struct efi_entry_hdr {
	u32 type;
	u32 size;
	u64 addr;
	u32 link;
	u32 spare1;
	u64 spare2;
};

/**
 * struct efi_entry_memmap - a memory map table passed to U-Boot
 *
 * @version:	EFI's memory map table version
 * @desc_size:	EFI's size of each memory descriptor
 * @spare:	Spare space for expansion
 * @desc:	An array of descriptors, each @desc_size bytes apart
 */
struct efi_entry_memmap {
	u32 version;
	u32 desc_size;
	u64 spare;
	struct efi_mem_desc desc[];
};

static inline struct efi_mem_desc *efi_get_next_mem_desc(
		struct efi_entry_memmap *map, struct efi_mem_desc *desc)
{
	return (struct efi_mem_desc *)((ulong)desc + map->desc_size);
}

struct efi_priv {
	efi_handle_t parent_image;
	struct efi_device_path *device_path;
	struct efi_system_table *sys_table;
	struct efi_boot_services *boot;
	struct efi_runtime_services *run;
	bool use_pool_for_malloc;
	unsigned long ram_base;
	unsigned int image_data_type;
	struct efi_info_hdr *info;
	unsigned int info_size;
	void *next_hdr;
};

/* Base address of the EFI image */
extern char image_base[];

/**
 * efi_get_sys_table() - Get access to the main EFI system table
 *
 * @return pointer to EFI system table
 */
struct efi_system_table *efi_get_sys_table(void);

/**
 * efi_get_ram_base() - Find the base of RAM
 *
 * This is used when U-Boot is built as an EFI application.
 *
 * @return the base of RAM as known to U-Boot
 */
unsigned long efi_get_ram_base(void);

/**
 * efi_init() - Set up ready for use of EFI boot services
 *
 * @priv:	Pointer to our private EFI structure to fill in
 * @banner:	Banner to display when starting
 * @image:	The image handle passed to efi_main()
 * @sys_table:	The EFI system table pointer passed to efi_main()
 */
int efi_init(struct efi_priv *priv, const char *banner, efi_handle_t image,
	     struct efi_system_table *sys_table);

/**
 * efi_malloc() - Allocate some memory from EFI
 *
 * @priv:	Pointer to private EFI structure
 * @size:	Number of bytes to allocate
 * @retp:	Return EFI status result
 * @return pointer to memory allocated, or NULL on error
 */
void *efi_malloc(struct efi_priv *priv, int size, efi_status_t *retp);

/**
 * efi_free() - Free memory allocated from EFI
 *
 * @priv:	Pointer to private EFI structure
 * @ptr:	Pointer to memory to free
 */
void efi_free(struct efi_priv *priv, void *ptr);

/**
 * efi_puts() - Write out a string to the EFI console
 *
 * @priv:	Pointer to private EFI structure
 * @str:	String to write (note this is a ASCII, not unicode)
 */
void efi_puts(struct efi_priv *priv, const char *str);

/**
 * efi_putc() - Write out a character to the EFI console
 *
 * @priv:	Pointer to private EFI structure
 * @ch:		Character to write (note this is not unicode)
 */
void efi_putc(struct efi_priv *priv, const char ch);

/**
 * efi_info_get() - get an entry from an EFI table
 *
 * @type:	Entry type to search for
 * @datap:	Returns pointer to entry data
 * @sizep:	Returns pointer to entry size
 * @return 0 if OK, -ENODATA if there is no table, -ENOENT if there is no entry
 * of the requested type, -EPROTONOSUPPORT if the table has the wrong version
 */
int efi_info_get(enum efi_entry_t type, void **datap, int *sizep);

/**
 * efi_build_mem_table() - make a sorted copy of the memory table
 *
 * @map:	Pointer to EFI memory map table
 * @size:	Size of table in bytes
 * @skip_bs:	True to skip boot-time memory and merge it with conventional
 *		memory. This will significantly reduce the number of table
 *		entries.
 * @return pointer to the new table. It should be freed with free() by the
 *	   caller
 */
void *efi_build_mem_table(struct efi_entry_memmap *map, int size, bool skip_bs);

#endif /* _LINUX_EFI_H */
Commit	Line	Data
867a6ac8 SG	1	/*
	2	* Extensible Firmware Interface
	3	* Based on 'Extensible Firmware Interface Specification' version 0.9,
	4	* April 30, 1999
	5	*
	6	* Copyright (C) 1999 VA Linux Systems
	7	* Copyright (C) 1999 Walt Drummond <[email protected]>
	8	* Copyright (C) 1999, 2002-2003 Hewlett-Packard Co.
	9	* David Mosberger-Tang <[email protected]>
	10	* Stephane Eranian <[email protected]>
	11	*
	12	* From include/linux/efi.h in kernel 4.1 with some additions/subtractions
	13	*/
	14
	15	#ifndef _EFI_H
	16	#define _EFI_H
	17
	18	#include <linux/string.h>
	19	#include <linux/types.h>
	20
	21	struct efi_device_path;
	22
	23	#define EFI_SUCCESS 0
	24	#define EFI_LOAD_ERROR (1 \| (1UL << (BITS_PER_LONG - 1)))
	25	#define EFI_INVALID_PARAMETER (2 \| (1UL << (BITS_PER_LONG - 1)))
	26	#define EFI_UNSUPPORTED (3 \| (1UL << (BITS_PER_LONG - 1)))
	27	#define EFI_BAD_BUFFER_SIZE (4 \| (1UL << (BITS_PER_LONG - 1)))
	28	#define EFI_BUFFER_TOO_SMALL (5 \| (1UL << (BITS_PER_LONG - 1)))
	29	#define EFI_NOT_READY (6 \| (1UL << (BITS_PER_LONG - 1)))
	30	#define EFI_DEVICE_ERROR (7 \| (1UL << (BITS_PER_LONG - 1)))
	31	#define EFI_WRITE_PROTECTED (8 \| (1UL << (BITS_PER_LONG - 1)))
	32	#define EFI_OUT_OF_RESOURCES (9 \| (1UL << (BITS_PER_LONG - 1)))
	33	#define EFI_NOT_FOUND (14 \| (1UL << (BITS_PER_LONG - 1)))
	34	#define EFI_SECURITY_VIOLATION (26 \| (1UL << (BITS_PER_LONG - 1)))
	35
	36	typedef unsigned long efi_status_t;
	37	typedef u64 efi_physical_addr_t;
	38	typedef u64 efi_virtual_addr_t;
	39	typedef void *efi_handle_t;
	40
	41	#define EFI_GUID(a, b, c, d0, d1, d2, d3, d4, d5, d6, d7) \
	42	((efi_guid_t) \
	43	{{ (a) & 0xff, ((a) >> 8) & 0xff, ((a) >> 16) & 0xff, \
	44	((a) >> 24) & 0xff, \
	45	(b) & 0xff, ((b) >> 8) & 0xff, \
	46	(c) & 0xff, ((c) >> 8) & 0xff, \
	47	(d0), (d1), (d2), (d3), (d4), (d5), (d6), (d7) } })
	48
	49	/* Generic EFI table header */
	50	struct efi_table_hdr {
	51	u64 signature;
	52	u32 revision;
	53	u32 headersize;
	54	u32 crc32;
	55	u32 reserved;
	56	};
	57
	58	/* Enumeration of memory types introduced in UEFI */
	59	enum efi_mem_type {
	60	EFI_RESERVED_MEMORY_TYPE,
	61	/*
	62	* The code portions of a loaded application.
	63	* (Note that UEFI OS loaders are UEFI applications.)
	64	*/
65	EFI_LOADER_CODE,
66	/*
67	* The data portions of a loaded application and
68	* the default data allocation type used by an application
69	* to allocate pool memory.
70	*/
71	EFI_LOADER_DATA,
72	/* The code portions of a loaded Boot Services Driver */
73	EFI_BOOT_SERVICES_CODE,
74	/*
75	* The data portions of a loaded Boot Serves Driver and
76	* the default data allocation type used by a Boot Services
77	* Driver to allocate pool memory.
78	*/
79	EFI_BOOT_SERVICES_DATA,
80	/* The code portions of a loaded Runtime Services Driver */
81	EFI_RUNTIME_SERVICES_CODE,
82	/*
83	* The data portions of a loaded Runtime Services Driver and
84	* the default data allocation type used by a Runtime Services
85	* Driver to allocate pool memory.
86	*/
87	EFI_RUNTIME_SERVICES_DATA,
88	/* Free (unallocated) memory */
89	EFI_CONVENTIONAL_MEMORY,
90	/* Memory in which errors have been detected */
91	EFI_UNUSABLE_MEMORY,
92	/* Memory that holds the ACPI tables */
93	EFI_ACPI_RECLAIM_MEMORY,
94	/* Address space reserved for use by the firmware */
95	EFI_ACPI_MEMORY_NVS,
96	/*
97	* Used by system firmware to request that a memory-mapped IO region
98	* be mapped by the OS to a virtual address so it can be accessed by
99	* EFI runtime services.
100	*/
101	EFI_MMAP_IO,
102	/*
103	* System memory-mapped IO region that is used to translate
104	* memory cycles to IO cycles by the processor.
105	*/
106	EFI_MMAP_IO_PORT,
107	/*
108	* Address space reserved by the firmware for code that is
109	* part of the processor.
110	*/
111	EFI_PAL_CODE,
112
113	EFI_MAX_MEMORY_TYPE,
114	EFI_TABLE_END, /* For efi_build_mem_table() */
115	};
116
117	/* Attribute values */
118	enum {
119	EFI_MEMORY_UC_SHIFT = 0, /* uncached */
120	EFI_MEMORY_WC_SHIFT = 1, /* write-coalescing */
121	EFI_MEMORY_WT_SHIFT = 2, /* write-through */
122	EFI_MEMORY_WB_SHIFT = 3, /* write-back */
123	EFI_MEMORY_UCE_SHIFT = 4, /* uncached, exported */
124	EFI_MEMORY_WP_SHIFT = 12, /* write-protect */
125	EFI_MEMORY_RP_SHIFT = 13, /* read-protect */
126	EFI_MEMORY_XP_SHIFT = 14, /* execute-protect */
127	EFI_MEMORY_RUNTIME_SHIFT = 63, /* range requires runtime mapping */
128
129	EFI_MEMORY_RUNTIME = 1ULL << EFI_MEMORY_RUNTIME_SHIFT,
130	EFI_MEM_DESC_VERSION = 1,
131	};
132
133	#define EFI_PAGE_SHIFT 12
134	#define EFI_PAGE_SIZE (1UL << EFI_PAGE_SHIFT)
135
136	struct efi_mem_desc {
137	u32 type;
138	u32 reserved;
139	efi_physical_addr_t physical_start;
140	efi_virtual_addr_t virtual_start;
141	u64 num_pages;
142	u64 attribute;
143	};
144
145	/* Allocation types for calls to boottime->allocate_pages*/
146	#define EFI_ALLOCATE_ANY_PAGES 0
147	#define EFI_ALLOCATE_MAX_ADDRESS 1
148	#define EFI_ALLOCATE_ADDRESS 2
149	#define EFI_MAX_ALLOCATE_TYPE 3
150
151	/* Types and defines for Time Services */
152	#define EFI_TIME_ADJUST_DAYLIGHT 0x1
153	#define EFI_TIME_IN_DAYLIGHT 0x2
154	#define EFI_UNSPECIFIED_TIMEZONE 0x07ff
155
156	struct efi_time {
157	u16 year;
158	u8 month;
159	u8 day;
160	u8 hour;
161	u8 minute;
162	u8 second;
163	u8 pad1;
164	u32 nanosecond;
165	s16 timezone;
166	u8 daylight;
167	u8 pad2;
168	};
169
170	struct efi_time_cap {
171	u32 resolution;
172	u32 accuracy;
173	u8 sets_to_zero;
174	};
175
176	enum efi_locate_search_type {
177	all_handles,
178	by_register_notify,
179	by_protocol
180	};
181
182	struct efi_open_protocol_info_entry {
183	efi_handle_t agent_handle;
184	efi_handle_t controller_handle;
185	u32 attributes;
186	u32 open_count;
187	};
188
189	enum efi_entry_t {
190	EFIET_END, /* Signals this is the last (empty) entry */
191	EFIET_MEMORY_MAP,
192
193	/* Number of entries */
194	EFIET_MEMORY_COUNT,
195	};
196
197	#define EFI_TABLE_VERSION 1
198
199	/**
200	* struct efi_info_hdr - Header for the EFI info table
201	*
202	* @version: EFI_TABLE_VERSION
203	* @hdr_size: Size of this struct in bytes
204	* @total_size: Total size of this header plus following data
205	* @spare: Spare space for expansion
206	*/
207	struct efi_info_hdr {
208	u32 version;
209	u32 hdr_size;
210	u32 total_size;
211	u32 spare[5];
212	};
213
214	/**
215	* struct efi_entry_hdr - Header for a table entry
216	*
217	* @type: enum eft_entry_t
218	* @size size of entry bytes excluding header and padding
219	* @addr: address of this entry (0 if it follows the header )
220	* @link: size of entry including header and padding
221	* @spare1: Spare space for expansion
222	* @spare2: Spare space for expansion
223	*/
224	struct efi_entry_hdr {
225	u32 type;
226	u32 size;
227	u64 addr;
228	u32 link;
229	u32 spare1;
230	u64 spare2;
231	};
232
233	/**
234	* struct efi_entry_memmap - a memory map table passed to U-Boot
235	*
236	* @version: EFI's memory map table version
237	* @desc_size: EFI's size of each memory descriptor
238	* @spare: Spare space for expansion
239	* @desc: An array of descriptors, each @desc_size bytes apart
240	*/
241	struct efi_entry_memmap {
242	u32 version;
243	u32 desc_size;
244	u64 spare;
245	struct efi_mem_desc desc[];
246	};
247
248	static inline struct efi_mem_desc *efi_get_next_mem_desc(
249	struct efi_entry_memmap map, struct efi_mem_desc desc)
250	{
251	return (struct efi_mem_desc *)((ulong)desc + map->desc_size);
252	}
253
254	struct efi_priv {
255	efi_handle_t parent_image;
256	struct efi_device_path *device_path;
257	struct efi_system_table *sys_table;
258	struct efi_boot_services *boot;
259	struct efi_runtime_services *run;
260	bool use_pool_for_malloc;
261	unsigned long ram_base;
262	unsigned int image_data_type;
263	struct efi_info_hdr *info;
264	unsigned int info_size;
265	void *next_hdr;
266	};
267
268	/* Base address of the EFI image */
269	extern char image_base[];
270
271	/**
272	* efi_get_sys_table() - Get access to the main EFI system table
273	*
274	* @return pointer to EFI system table
275	*/
276	struct efi_system_table *efi_get_sys_table(void);
277
278	/**
279	* efi_get_ram_base() - Find the base of RAM
280	*
281	* This is used when U-Boot is built as an EFI application.
282	*
283	* @return the base of RAM as known to U-Boot
284	*/
285	unsigned long efi_get_ram_base(void);
286
287	/**
288	* efi_init() - Set up ready for use of EFI boot services
289	*
290	* @priv: Pointer to our private EFI structure to fill in
291	* @banner: Banner to display when starting
292	* @image: The image handle passed to efi_main()
293	* @sys_table: The EFI system table pointer passed to efi_main()
294	*/
295	int efi_init(struct efi_priv priv, const char banner, efi_handle_t image,
296	struct efi_system_table *sys_table);
297
298	/**
299	* efi_malloc() - Allocate some memory from EFI
300	*
301	* @priv: Pointer to private EFI structure
302	* @size: Number of bytes to allocate
303	* @retp: Return EFI status result
304	* @return pointer to memory allocated, or NULL on error
305	*/
306	void efi_malloc(struct efi_priv priv, int size, efi_status_t *retp);
307
308	/**
309	* efi_free() - Free memory allocated from EFI
310	*
311	* @priv: Pointer to private EFI structure
312	* @ptr: Pointer to memory to free
313	*/
314	void efi_free(struct efi_priv priv, void ptr);
315
316	/**
317	* efi_puts() - Write out a string to the EFI console
318	*
319	* @priv: Pointer to private EFI structure
320	* @str: String to write (note this is a ASCII, not unicode)
321	*/
322	void efi_puts(struct efi_priv priv, const char str);
323
324	/**
325	* efi_putc() - Write out a character to the EFI console
326	*
327	* @priv: Pointer to private EFI structure
328	* @ch: Character to write (note this is not unicode)
329	*/
330	void efi_putc(struct efi_priv *priv, const char ch);
331
332	/**
333	* efi_info_get() - get an entry from an EFI table
334	*
335	* @type: Entry type to search for
336	* @datap: Returns pointer to entry data
337	* @sizep: Returns pointer to entry size
338	* @return 0 if OK, -ENODATA if there is no table, -ENOENT if there is no entry
339	* of the requested type, -EPROTONOSUPPORT if the table has the wrong version
340	*/
341	int efi_info_get(enum efi_entry_t type, void *datap, int sizep);
342
343	/**
344	* efi_build_mem_table() - make a sorted copy of the memory table
345	*
346	* @map: Pointer to EFI memory map table
347	* @size: Size of table in bytes
348	* @skip_bs: True to skip boot-time memory and merge it with conventional
349	* memory. This will significantly reduce the number of table
350	* entries.
351	* @return pointer to the new table. It should be freed with free() by the
352	* caller
353	*/
354	void efi_build_mem_table(struct efi_entry_memmap map, int size, bool skip_bs);
355
356	#endif /* _LINUX_EFI_H */