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/*
* 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>
*
* 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>
#ifdef CONFIG_EFI_STUB_64BIT
/* EFI uses the Microsoft ABI which is not the default for GCC */
#define EFIAPI __attribute__((ms_abi))
#else
#define EFIAPI
#endif
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[];
/* Start and end of U-Boot image (for payload) */
extern char _binary_u_boot_dtb_bin_start[], _binary_u_boot_dtb_bin_end[];
/**
* 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 */