include/linux/efi.h - kernel/msm - Gitiles

 #ifndef _LINUX_EFI_H
 #define _LINUX_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 <drummond@valinux.com>
  * Copyright (C) 1999, 2002-2003 Hewlett-Packard Co.
  *	David Mosberger-Tang <davidm@hpl.hp.com>
  *	Stephane Eranian <eranian@hpl.hp.com>
  */
 #include <linux/init.h>
 #include <linux/string.h>
 #include <linux/time.h>
 #include <linux/types.h>
 #include <linux/proc_fs.h>
 #include <linux/rtc.h>
 #include <linux/ioport.h>

 #include <asm/page.h>
 #include <asm/system.h>

 #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_FOUND		(14 | (1UL << (BITS_PER_LONG-1)))

 typedef unsigned long efi_status_t;
 typedef u8 efi_bool_t;
 typedef u16 efi_char16_t;		/* UNICODE character */


 typedef struct {
 	u8 b[16];
 } efi_guid_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
  */
 typedef	struct {
 	u64 signature;
 	u32 revision;
 	u32 headersize;
 	u32 crc32;
 	u32 reserved;
 } efi_table_hdr_t;

 /*
  * Memory map descriptor:
  */

 /* Memory types: */
 #define EFI_RESERVED_TYPE		 0
 #define EFI_LOADER_CODE			 1
 #define EFI_LOADER_DATA			 2
 #define EFI_BOOT_SERVICES_CODE		 3
 #define EFI_BOOT_SERVICES_DATA		 4
 #define EFI_RUNTIME_SERVICES_CODE	 5
 #define EFI_RUNTIME_SERVICES_DATA	 6
 #define EFI_CONVENTIONAL_MEMORY		 7
 #define EFI_UNUSABLE_MEMORY		 8
 #define EFI_ACPI_RECLAIM_MEMORY		 9
 #define EFI_ACPI_MEMORY_NVS		10
 #define EFI_MEMORY_MAPPED_IO		11
 #define EFI_MEMORY_MAPPED_IO_PORT_SPACE	12
 #define EFI_PAL_CODE			13
 #define EFI_MAX_MEMORY_TYPE		14

 /* Attribute values: */
 #define EFI_MEMORY_UC		((u64)0x0000000000000001ULL)	/* uncached */
 #define EFI_MEMORY_WC		((u64)0x0000000000000002ULL)	/* write-coalescing */
 #define EFI_MEMORY_WT		((u64)0x0000000000000004ULL)	/* write-through */
 #define EFI_MEMORY_WB		((u64)0x0000000000000008ULL)	/* write-back */
 #define EFI_MEMORY_WP		((u64)0x0000000000001000ULL)	/* write-protect */
 #define EFI_MEMORY_RP		((u64)0x0000000000002000ULL)	/* read-protect */
 #define EFI_MEMORY_XP		((u64)0x0000000000004000ULL)	/* execute-protect */
 #define EFI_MEMORY_RUNTIME	((u64)0x8000000000000000ULL)	/* range requires runtime mapping */
 #define EFI_MEMORY_DESCRIPTOR_VERSION	1

 #define EFI_PAGE_SHIFT		12

 /*
  * For current x86 implementations of EFI, there is
  * additional padding in the mem descriptors.  This is not
  * the case in ia64.  Need to have this fixed in the f/w.
  */
 typedef struct {
 	u32 type;
 	u32 pad;
 	u64 phys_addr;
 	u64 virt_addr;
 	u64 num_pages;
 	u64 attribute;
 #if defined (__i386__)
 	u64 pad1;
 #endif
 } efi_memory_desc_t;

 typedef int (*efi_freemem_callback_t) (unsigned long start, unsigned long end, void *arg);

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

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

 typedef struct {
 	u32 resolution;
 	u32 accuracy;
 	u8 sets_to_zero;
 } efi_time_cap_t;

 /*
  * Types and defines for EFI ResetSystem
  */
 #define EFI_RESET_COLD 0
 #define EFI_RESET_WARM 1
 #define EFI_RESET_SHUTDOWN 2

 /*
  * EFI Runtime Services table
  */
 #define EFI_RUNTIME_SERVICES_SIGNATURE ((u64)0x5652453544e5552ULL)
 #define EFI_RUNTIME_SERVICES_REVISION  0x00010000

 typedef struct {
 	efi_table_hdr_t hdr;
 	unsigned long get_time;
 	unsigned long set_time;
 	unsigned long get_wakeup_time;
 	unsigned long set_wakeup_time;
 	unsigned long set_virtual_address_map;
 	unsigned long convert_pointer;
 	unsigned long get_variable;
 	unsigned long get_next_variable;
 	unsigned long set_variable;
 	unsigned long get_next_high_mono_count;
 	unsigned long reset_system;
 } efi_runtime_services_t;

 typedef efi_status_t efi_get_time_t (efi_time_t *tm, efi_time_cap_t *tc);
 typedef efi_status_t efi_set_time_t (efi_time_t *tm);
 typedef efi_status_t efi_get_wakeup_time_t (efi_bool_t *enabled, efi_bool_t *pending,
 					    efi_time_t *tm);
 typedef efi_status_t efi_set_wakeup_time_t (efi_bool_t enabled, efi_time_t *tm);
 typedef efi_status_t efi_get_variable_t (efi_char16_t *name, efi_guid_t *vendor, u32 *attr,
 					 unsigned long *data_size, void *data);
 typedef efi_status_t efi_get_next_variable_t (unsigned long *name_size, efi_char16_t *name,
 					      efi_guid_t *vendor);
 typedef efi_status_t efi_set_variable_t (efi_char16_t *name, efi_guid_t *vendor,
 					 unsigned long attr, unsigned long data_size,
 					 void *data);
 typedef efi_status_t efi_get_next_high_mono_count_t (u32 *count);
 typedef void efi_reset_system_t (int reset_type, efi_status_t status,
 				 unsigned long data_size, efi_char16_t *data);
 typedef efi_status_t efi_set_virtual_address_map_t (unsigned long memory_map_size,
 						unsigned long descriptor_size,
 						u32 descriptor_version,
 						efi_memory_desc_t *virtual_map);

 /*
  *  EFI Configuration Table and GUID definitions
  */
 #define NULL_GUID \
     EFI_GUID(  0x00000000, 0x0000, 0x0000, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 )

 #define MPS_TABLE_GUID    \
     EFI_GUID(  0xeb9d2d2f, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )

 #define ACPI_TABLE_GUID    \
     EFI_GUID(  0xeb9d2d30, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )

 #define ACPI_20_TABLE_GUID    \
     EFI_GUID(  0x8868e871, 0xe4f1, 0x11d3, 0xbc, 0x22, 0x0, 0x80, 0xc7, 0x3c, 0x88, 0x81 )

 #define SMBIOS_TABLE_GUID    \
     EFI_GUID(  0xeb9d2d31, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )

 #define SAL_SYSTEM_TABLE_GUID    \
     EFI_GUID(  0xeb9d2d32, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )

 #define HCDP_TABLE_GUID	\
     EFI_GUID(  0xf951938d, 0x620b, 0x42ef, 0x82, 0x79, 0xa8, 0x4b, 0x79, 0x61, 0x78, 0x98 )

 #define UGA_IO_PROTOCOL_GUID \
     EFI_GUID(  0x61a4d49e, 0x6f68, 0x4f1b, 0xb9, 0x22, 0xa8, 0x6e, 0xed, 0xb, 0x7, 0xa2 )

 #define EFI_GLOBAL_VARIABLE_GUID \
     EFI_GUID(  0x8be4df61, 0x93ca, 0x11d2, 0xaa, 0x0d, 0x00, 0xe0, 0x98, 0x03, 0x2b, 0x8c )

 typedef struct {
 	efi_guid_t guid;
 	unsigned long table;
 } efi_config_table_t;

 #define EFI_SYSTEM_TABLE_SIGNATURE ((u64)0x5453595320494249ULL)
 #define EFI_SYSTEM_TABLE_REVISION  ((1 << 16) | 00)

 typedef struct {
 	efi_table_hdr_t hdr;
 	unsigned long fw_vendor;	/* physical addr of CHAR16 vendor string */
 	u32 fw_revision;
 	unsigned long con_in_handle;
 	unsigned long con_in;
 	unsigned long con_out_handle;
 	unsigned long con_out;
 	unsigned long stderr_handle;
 	unsigned long stderr;
 	efi_runtime_services_t *runtime;
 	unsigned long boottime;
 	unsigned long nr_tables;
 	unsigned long tables;
 } efi_system_table_t;

 struct efi_memory_map {
 	efi_memory_desc_t *phys_map;
 	efi_memory_desc_t *map;
 	int nr_map;
 	unsigned long desc_version;
 };

 /*
  * All runtime access to EFI goes through this structure:
  */
 extern struct efi {
 	efi_system_table_t *systab;	/* EFI system table */
 	void *mps;			/* MPS table */
 	void *acpi;			/* ACPI table  (IA64 ext 0.71) */
 	void *acpi20;			/* ACPI table  (ACPI 2.0) */
 	void *smbios;			/* SM BIOS table */
 	void *sal_systab;		/* SAL system table */
 	void *boot_info;		/* boot info table */
 	void *hcdp;			/* HCDP table */
 	void *uga;			/* UGA table */
 	efi_get_time_t *get_time;
 	efi_set_time_t *set_time;
 	efi_get_wakeup_time_t *get_wakeup_time;
 	efi_set_wakeup_time_t *set_wakeup_time;
 	efi_get_variable_t *get_variable;
 	efi_get_next_variable_t *get_next_variable;
 	efi_set_variable_t *set_variable;
 	efi_get_next_high_mono_count_t *get_next_high_mono_count;
 	efi_reset_system_t *reset_system;
 	efi_set_virtual_address_map_t *set_virtual_address_map;
 } efi;

 static inline int
 efi_guidcmp (efi_guid_t left, efi_guid_t right)
 {
 	return memcmp(&left, &right, sizeof (efi_guid_t));
 }

 static inline char *
 efi_guid_unparse(efi_guid_t *guid, char *out)
 {
 	sprintf(out, "%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x",
 		guid->b[3], guid->b[2], guid->b[1], guid->b[0],
 		guid->b[5], guid->b[4], guid->b[7], guid->b[6],
 		guid->b[8], guid->b[9], guid->b[10], guid->b[11],
 		guid->b[12], guid->b[13], guid->b[14], guid->b[15]);
         return out;
 }

 extern void efi_init (void);
 extern void *efi_get_pal_addr (void);
 extern void efi_map_pal_code (void);
 extern void efi_map_memmap(void);
 extern void efi_memmap_walk (efi_freemem_callback_t callback, void *arg);
 extern void efi_gettimeofday (struct timespec *ts);
 extern void efi_enter_virtual_mode (void);	/* switch EFI to virtual mode, if possible */
 extern u64 efi_get_iobase (void);
 extern u32 efi_mem_type (unsigned long phys_addr);
 extern u64 efi_mem_attributes (unsigned long phys_addr);
 extern int __init efi_uart_console_only (void);
 extern void efi_initialize_iomem_resources(struct resource *code_resource,
 					struct resource *data_resource);
 extern unsigned long __init efi_get_time(void);
 extern int __init efi_set_rtc_mmss(unsigned long nowtime);
 extern struct efi_memory_map memmap;

 /**
  * efi_range_is_wc - check the WC bit on an address range
  * @start: starting kvirt address
  * @len: length of range
  *
  * Consult the EFI memory map and make sure it's ok to set this range WC.
  * Returns true or false.
  */
 static inline int efi_range_is_wc(unsigned long start, unsigned long len)
 {
 	unsigned long i;

 	for (i = 0; i < len; i += (1UL << EFI_PAGE_SHIFT)) {
 		unsigned long paddr = __pa(start + i);
 		if (!(efi_mem_attributes(paddr) & EFI_MEMORY_WC))
 			return 0;
 	}
 	/* The range checked out */
 	return 1;
 }

 #ifdef CONFIG_EFI_PCDP
 extern int __init efi_setup_pcdp_console(char *);
 #endif

 /*
  * We play games with efi_enabled so that the compiler will, if possible, remove
  * EFI-related code altogether.
  */
 #ifdef CONFIG_EFI
 # ifdef CONFIG_X86
    extern int efi_enabled;
 # else
 #  define efi_enabled 1
 # endif
 #else
 # define efi_enabled 0
 #endif

 /*
  * Variable Attributes
  */
 #define EFI_VARIABLE_NON_VOLATILE       0x0000000000000001
 #define EFI_VARIABLE_BOOTSERVICE_ACCESS 0x0000000000000002
 #define EFI_VARIABLE_RUNTIME_ACCESS     0x0000000000000004

 /*
  * EFI Device Path information
  */
 #define EFI_DEV_HW			0x01
 #define  EFI_DEV_PCI				 1
 #define  EFI_DEV_PCCARD				 2
 #define  EFI_DEV_MEM_MAPPED			 3
 #define  EFI_DEV_VENDOR				 4
 #define  EFI_DEV_CONTROLLER			 5
 #define EFI_DEV_ACPI			0x02
 #define   EFI_DEV_BASIC_ACPI			 1
 #define   EFI_DEV_EXPANDED_ACPI			 2
 #define EFI_DEV_MSG			0x03
 #define   EFI_DEV_MSG_ATAPI			 1
 #define   EFI_DEV_MSG_SCSI			 2
 #define   EFI_DEV_MSG_FC			 3
 #define   EFI_DEV_MSG_1394			 4
 #define   EFI_DEV_MSG_USB			 5
 #define   EFI_DEV_MSG_USB_CLASS			15
 #define   EFI_DEV_MSG_I20			 6
 #define   EFI_DEV_MSG_MAC			11
 #define   EFI_DEV_MSG_IPV4			12
 #define   EFI_DEV_MSG_IPV6			13
 #define   EFI_DEV_MSG_INFINIBAND		 9
 #define   EFI_DEV_MSG_UART			14
 #define   EFI_DEV_MSG_VENDOR			10
 #define EFI_DEV_MEDIA			0x04
 #define   EFI_DEV_MEDIA_HARD_DRIVE		 1
 #define   EFI_DEV_MEDIA_CDROM			 2
 #define   EFI_DEV_MEDIA_VENDOR			 3
 #define   EFI_DEV_MEDIA_FILE			 4
 #define   EFI_DEV_MEDIA_PROTOCOL		 5
 #define EFI_DEV_BIOS_BOOT		0x05
 #define EFI_DEV_END_PATH		0x7F
 #define EFI_DEV_END_PATH2		0xFF
 #define   EFI_DEV_END_INSTANCE			0x01
 #define   EFI_DEV_END_ENTIRE			0xFF

 struct efi_generic_dev_path {
 	u8 type;
 	u8 sub_type;
 	u16 length;
 } __attribute ((packed));

 #endif /* _LINUX_EFI_H */
	#ifndef _LINUX_EFI_H
	#define _LINUX_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 <drummond@valinux.com>
	* Copyright (C) 1999, 2002-2003 Hewlett-Packard Co.
	* David Mosberger-Tang <davidm@hpl.hp.com>
	* Stephane Eranian <eranian@hpl.hp.com>
	*/
	#include <linux/init.h>
	#include <linux/string.h>
	#include <linux/time.h>
	#include <linux/types.h>
	#include <linux/proc_fs.h>
	#include <linux/rtc.h>
	#include <linux/ioport.h>

	#include <asm/page.h>
	#include <asm/system.h>

	#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_FOUND (14 \| (1UL << (BITS_PER_LONG-1)))

	typedef unsigned long efi_status_t;
	typedef u8 efi_bool_t;
	typedef u16 efi_char16_t; /* UNICODE character */


	typedef struct {
	u8 b[16];
	} efi_guid_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
	*/
	typedef struct {
	u64 signature;
	u32 revision;
	u32 headersize;
	u32 crc32;
	u32 reserved;
	} efi_table_hdr_t;

	/*
	* Memory map descriptor:
	*/

	/* Memory types: */
	#define EFI_RESERVED_TYPE 0
	#define EFI_LOADER_CODE 1
	#define EFI_LOADER_DATA 2
	#define EFI_BOOT_SERVICES_CODE 3
	#define EFI_BOOT_SERVICES_DATA 4
	#define EFI_RUNTIME_SERVICES_CODE 5
	#define EFI_RUNTIME_SERVICES_DATA 6
	#define EFI_CONVENTIONAL_MEMORY 7
	#define EFI_UNUSABLE_MEMORY 8
	#define EFI_ACPI_RECLAIM_MEMORY 9
	#define EFI_ACPI_MEMORY_NVS 10
	#define EFI_MEMORY_MAPPED_IO 11
	#define EFI_MEMORY_MAPPED_IO_PORT_SPACE 12
	#define EFI_PAL_CODE 13
	#define EFI_MAX_MEMORY_TYPE 14

	/* Attribute values: */
	#define EFI_MEMORY_UC ((u64)0x0000000000000001ULL) /* uncached */
	#define EFI_MEMORY_WC ((u64)0x0000000000000002ULL) /* write-coalescing */
	#define EFI_MEMORY_WT ((u64)0x0000000000000004ULL) /* write-through */
	#define EFI_MEMORY_WB ((u64)0x0000000000000008ULL) /* write-back */
	#define EFI_MEMORY_WP ((u64)0x0000000000001000ULL) /* write-protect */
	#define EFI_MEMORY_RP ((u64)0x0000000000002000ULL) /* read-protect */
	#define EFI_MEMORY_XP ((u64)0x0000000000004000ULL) /* execute-protect */
	#define EFI_MEMORY_RUNTIME ((u64)0x8000000000000000ULL) /* range requires runtime mapping */
	#define EFI_MEMORY_DESCRIPTOR_VERSION 1

	#define EFI_PAGE_SHIFT 12

	/*
	* For current x86 implementations of EFI, there is
	* additional padding in the mem descriptors. This is not
	* the case in ia64. Need to have this fixed in the f/w.
	*/
	typedef struct {
	u32 type;
	u32 pad;
	u64 phys_addr;
	u64 virt_addr;
	u64 num_pages;
	u64 attribute;
	#if defined (__i386__)
	u64 pad1;
	#endif
	} efi_memory_desc_t;

	typedef int (efi_freemem_callback_t) (unsigned long start, unsigned long end, void arg);

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

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

	typedef struct {
	u32 resolution;
	u32 accuracy;
	u8 sets_to_zero;
	} efi_time_cap_t;

	/*
	* Types and defines for EFI ResetSystem
	*/
	#define EFI_RESET_COLD 0
	#define EFI_RESET_WARM 1
	#define EFI_RESET_SHUTDOWN 2

	/*
	* EFI Runtime Services table
	*/
	#define EFI_RUNTIME_SERVICES_SIGNATURE ((u64)0x5652453544e5552ULL)
	#define EFI_RUNTIME_SERVICES_REVISION 0x00010000

	typedef struct {
	efi_table_hdr_t hdr;
	unsigned long get_time;
	unsigned long set_time;
	unsigned long get_wakeup_time;
	unsigned long set_wakeup_time;
	unsigned long set_virtual_address_map;
	unsigned long convert_pointer;
	unsigned long get_variable;
	unsigned long get_next_variable;
	unsigned long set_variable;
	unsigned long get_next_high_mono_count;
	unsigned long reset_system;
	} efi_runtime_services_t;

	typedef efi_status_t efi_get_time_t (efi_time_t tm, efi_time_cap_t tc);
	typedef efi_status_t efi_set_time_t (efi_time_t *tm);
	typedef efi_status_t efi_get_wakeup_time_t (efi_bool_t enabled, efi_bool_t pending,
	efi_time_t *tm);
	typedef efi_status_t efi_set_wakeup_time_t (efi_bool_t enabled, efi_time_t *tm);
	typedef efi_status_t efi_get_variable_t (efi_char16_t name, efi_guid_t vendor, u32 *attr,
	unsigned long data_size, void data);
	typedef efi_status_t efi_get_next_variable_t (unsigned long name_size, efi_char16_t name,
	efi_guid_t *vendor);
	typedef efi_status_t efi_set_variable_t (efi_char16_t name, efi_guid_t vendor,
	unsigned long attr, unsigned long data_size,
	void *data);
	typedef efi_status_t efi_get_next_high_mono_count_t (u32 *count);
	typedef void efi_reset_system_t (int reset_type, efi_status_t status,
	unsigned long data_size, efi_char16_t *data);
	typedef efi_status_t efi_set_virtual_address_map_t (unsigned long memory_map_size,
	unsigned long descriptor_size,
	u32 descriptor_version,
	efi_memory_desc_t *virtual_map);

	/*
	* EFI Configuration Table and GUID definitions
	*/
	#define NULL_GUID \
	EFI_GUID( 0x00000000, 0x0000, 0x0000, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 )

	#define MPS_TABLE_GUID \
	EFI_GUID( 0xeb9d2d2f, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )

	#define ACPI_TABLE_GUID \
	EFI_GUID( 0xeb9d2d30, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )

	#define ACPI_20_TABLE_GUID \
	EFI_GUID( 0x8868e871, 0xe4f1, 0x11d3, 0xbc, 0x22, 0x0, 0x80, 0xc7, 0x3c, 0x88, 0x81 )

	#define SMBIOS_TABLE_GUID \
	EFI_GUID( 0xeb9d2d31, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )

	#define SAL_SYSTEM_TABLE_GUID \
	EFI_GUID( 0xeb9d2d32, 0x2d88, 0x11d3, 0x9a, 0x16, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d )

	#define HCDP_TABLE_GUID \
	EFI_GUID( 0xf951938d, 0x620b, 0x42ef, 0x82, 0x79, 0xa8, 0x4b, 0x79, 0x61, 0x78, 0x98 )

	#define UGA_IO_PROTOCOL_GUID \
	EFI_GUID( 0x61a4d49e, 0x6f68, 0x4f1b, 0xb9, 0x22, 0xa8, 0x6e, 0xed, 0xb, 0x7, 0xa2 )

	#define EFI_GLOBAL_VARIABLE_GUID \
	EFI_GUID( 0x8be4df61, 0x93ca, 0x11d2, 0xaa, 0x0d, 0x00, 0xe0, 0x98, 0x03, 0x2b, 0x8c )

	typedef struct {
	efi_guid_t guid;
	unsigned long table;
	} efi_config_table_t;

	#define EFI_SYSTEM_TABLE_SIGNATURE ((u64)0x5453595320494249ULL)
	#define EFI_SYSTEM_TABLE_REVISION ((1 << 16) \| 00)

	typedef struct {
	efi_table_hdr_t hdr;
	unsigned long fw_vendor; /* physical addr of CHAR16 vendor string */
	u32 fw_revision;
	unsigned long con_in_handle;
	unsigned long con_in;
	unsigned long con_out_handle;
	unsigned long con_out;
	unsigned long stderr_handle;
	unsigned long stderr;
	efi_runtime_services_t *runtime;
	unsigned long boottime;
	unsigned long nr_tables;
	unsigned long tables;
	} efi_system_table_t;

	struct efi_memory_map {
	efi_memory_desc_t *phys_map;
	efi_memory_desc_t *map;
	int nr_map;
	unsigned long desc_version;
	};

	/*
	* All runtime access to EFI goes through this structure:
	*/
	extern struct efi {
	efi_system_table_t systab; / EFI system table */
	void mps; / MPS table */
	void acpi; / ACPI table (IA64 ext 0.71) */
	void acpi20; / ACPI table (ACPI 2.0) */
	void smbios; / SM BIOS table */
	void sal_systab; / SAL system table */
	void boot_info; / boot info table */
	void hcdp; / HCDP table */
	void uga; / UGA table */
	efi_get_time_t *get_time;
	efi_set_time_t *set_time;
	efi_get_wakeup_time_t *get_wakeup_time;
	efi_set_wakeup_time_t *set_wakeup_time;
	efi_get_variable_t *get_variable;
	efi_get_next_variable_t *get_next_variable;
	efi_set_variable_t *set_variable;
	efi_get_next_high_mono_count_t *get_next_high_mono_count;
	efi_reset_system_t *reset_system;
	efi_set_virtual_address_map_t *set_virtual_address_map;
	} efi;

	static inline int
	efi_guidcmp (efi_guid_t left, efi_guid_t right)
	{
	return memcmp(&left, &right, sizeof (efi_guid_t));
	}

	static inline char *
	efi_guid_unparse(efi_guid_t guid, char out)
	{
	sprintf(out, "%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x",
	guid->b[3], guid->b[2], guid->b[1], guid->b[0],
	guid->b[5], guid->b[4], guid->b[7], guid->b[6],
	guid->b[8], guid->b[9], guid->b[10], guid->b[11],
	guid->b[12], guid->b[13], guid->b[14], guid->b[15]);
	return out;
	}

	extern void efi_init (void);
	extern void *efi_get_pal_addr (void);
	extern void efi_map_pal_code (void);
	extern void efi_map_memmap(void);
	extern void efi_memmap_walk (efi_freemem_callback_t callback, void *arg);
	extern void efi_gettimeofday (struct timespec *ts);
	extern void efi_enter_virtual_mode (void); /* switch EFI to virtual mode, if possible */
	extern u64 efi_get_iobase (void);
	extern u32 efi_mem_type (unsigned long phys_addr);
	extern u64 efi_mem_attributes (unsigned long phys_addr);
	extern int __init efi_uart_console_only (void);
	extern void efi_initialize_iomem_resources(struct resource *code_resource,
	struct resource *data_resource);
	extern unsigned long __init efi_get_time(void);
	extern int __init efi_set_rtc_mmss(unsigned long nowtime);
	extern struct efi_memory_map memmap;

	/**
	* efi_range_is_wc - check the WC bit on an address range
	* @start: starting kvirt address
	* @len: length of range
	*
	* Consult the EFI memory map and make sure it's ok to set this range WC.
	* Returns true or false.
	*/
	static inline int efi_range_is_wc(unsigned long start, unsigned long len)
	{
	unsigned long i;

	for (i = 0; i < len; i += (1UL << EFI_PAGE_SHIFT)) {
	unsigned long paddr = __pa(start + i);
	if (!(efi_mem_attributes(paddr) & EFI_MEMORY_WC))
	return 0;
	}
	/* The range checked out */
	return 1;
	}

	#ifdef CONFIG_EFI_PCDP
	extern int __init efi_setup_pcdp_console(char *);
	#endif

	/*
	* We play games with efi_enabled so that the compiler will, if possible, remove
	* EFI-related code altogether.
	*/
	#ifdef CONFIG_EFI
	# ifdef CONFIG_X86
	extern int efi_enabled;
	# else
	# define efi_enabled 1
	# endif
	#else
	# define efi_enabled 0
	#endif

	/*
	* Variable Attributes
	*/
	#define EFI_VARIABLE_NON_VOLATILE 0x0000000000000001
	#define EFI_VARIABLE_BOOTSERVICE_ACCESS 0x0000000000000002
	#define EFI_VARIABLE_RUNTIME_ACCESS 0x0000000000000004

	/*
	* EFI Device Path information
	*/
	#define EFI_DEV_HW 0x01
	#define EFI_DEV_PCI 1
	#define EFI_DEV_PCCARD 2
	#define EFI_DEV_MEM_MAPPED 3
	#define EFI_DEV_VENDOR 4
	#define EFI_DEV_CONTROLLER 5
	#define EFI_DEV_ACPI 0x02
	#define EFI_DEV_BASIC_ACPI 1
	#define EFI_DEV_EXPANDED_ACPI 2
	#define EFI_DEV_MSG 0x03
	#define EFI_DEV_MSG_ATAPI 1
	#define EFI_DEV_MSG_SCSI 2
	#define EFI_DEV_MSG_FC 3
	#define EFI_DEV_MSG_1394 4
	#define EFI_DEV_MSG_USB 5
	#define EFI_DEV_MSG_USB_CLASS 15
	#define EFI_DEV_MSG_I20 6
	#define EFI_DEV_MSG_MAC 11
	#define EFI_DEV_MSG_IPV4 12
	#define EFI_DEV_MSG_IPV6 13
	#define EFI_DEV_MSG_INFINIBAND 9
	#define EFI_DEV_MSG_UART 14
	#define EFI_DEV_MSG_VENDOR 10
	#define EFI_DEV_MEDIA 0x04
	#define EFI_DEV_MEDIA_HARD_DRIVE 1
	#define EFI_DEV_MEDIA_CDROM 2
	#define EFI_DEV_MEDIA_VENDOR 3
	#define EFI_DEV_MEDIA_FILE 4
	#define EFI_DEV_MEDIA_PROTOCOL 5
	#define EFI_DEV_BIOS_BOOT 0x05
	#define EFI_DEV_END_PATH 0x7F
	#define EFI_DEV_END_PATH2 0xFF
	#define EFI_DEV_END_INSTANCE 0x01
	#define EFI_DEV_END_ENTIRE 0xFF

	struct efi_generic_dev_path {
	u8 type;
	u8 sub_type;
	u16 length;
	} __attribute ((packed));

	#endif /* _LINUX_EFI_H */