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u-boot/include/efi.h

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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/linkage.h>
#include <linux/string.h>
#include <linux/types.h>
/*
* EFI on x86_64 uses the Microsoft ABI which is not the default for GCC.
*
* There are two scenarios for EFI on x86_64: building a 64-bit EFI stub
* codes (CONFIG_EFI_STUB_64BIT) and building a 64-bit U-Boot (CONFIG_X86_64).
* Either needs to be properly built with the '-m64' compiler flag, and hence
* it is enough to only check the compiler provided define __x86_64__ here.
*/
#ifdef __x86_64__
#define EFIAPI __attribute__((ms_abi))
#else
#define EFIAPI asmlinkage
#endif /* __x86_64__ */
struct efi_device_path;
typedef struct {
u8 b[16];
} efi_guid_t;
#define EFI_BITS_PER_LONG (sizeof(long) * 8)
/* Bit mask for EFI status code with error */
#define EFI_ERROR_MASK (1UL << (EFI_BITS_PER_LONG - 1))
/* Status codes returned by EFI protocols */
#define EFI_SUCCESS 0
#define EFI_LOAD_ERROR (EFI_ERROR_MASK | 1)
#define EFI_INVALID_PARAMETER (EFI_ERROR_MASK | 2)
#define EFI_UNSUPPORTED (EFI_ERROR_MASK | 3)
#define EFI_BAD_BUFFER_SIZE (EFI_ERROR_MASK | 4)
#define EFI_BUFFER_TOO_SMALL (EFI_ERROR_MASK | 5)
#define EFI_NOT_READY (EFI_ERROR_MASK | 6)
#define EFI_DEVICE_ERROR (EFI_ERROR_MASK | 7)
#define EFI_WRITE_PROTECTED (EFI_ERROR_MASK | 8)
#define EFI_OUT_OF_RESOURCES (EFI_ERROR_MASK | 9)
#define EFI_VOLUME_CORRUPTED (EFI_ERROR_MASK | 10)
#define EFI_VOLUME_FULL (EFI_ERROR_MASK | 11)
#define EFI_NO_MEDIA (EFI_ERROR_MASK | 12)
#define EFI_MEDIA_CHANGED (EFI_ERROR_MASK | 13)
#define EFI_NOT_FOUND (EFI_ERROR_MASK | 14)
#define EFI_ACCESS_DENIED (EFI_ERROR_MASK | 15)
#define EFI_NO_RESPONSE (EFI_ERROR_MASK | 16)
#define EFI_NO_MAPPING (EFI_ERROR_MASK | 17)
#define EFI_TIMEOUT (EFI_ERROR_MASK | 18)
#define EFI_NOT_STARTED (EFI_ERROR_MASK | 19)
#define EFI_ALREADY_STARTED (EFI_ERROR_MASK | 20)
#define EFI_ABORTED (EFI_ERROR_MASK | 21)
#define EFI_ICMP_ERROR (EFI_ERROR_MASK | 22)
#define EFI_TFTP_ERROR (EFI_ERROR_MASK | 23)
#define EFI_PROTOCOL_ERROR (EFI_ERROR_MASK | 24)
#define EFI_INCOMPATIBLE_VERSION (EFI_ERROR_MASK | 25)
#define EFI_SECURITY_VIOLATION (EFI_ERROR_MASK | 26)
#define EFI_CRC_ERROR (EFI_ERROR_MASK | 27)
#define EFI_END_OF_MEDIA (EFI_ERROR_MASK | 28)
#define EFI_END_OF_FILE (EFI_ERROR_MASK | 31)
#define EFI_INVALID_LANGUAGE (EFI_ERROR_MASK | 32)
#define EFI_COMPROMISED_DATA (EFI_ERROR_MASK | 33)
#define EFI_IP_ADDRESS_CONFLICT (EFI_ERROR_MASK | 34)
#define EFI_HTTP_ERROR (EFI_ERROR_MASK | 35)
#define EFI_WARN_DELETE_FAILURE 2
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) \
{{ (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 Services 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)
#define EFI_PAGE_MASK (EFI_PAGE_SIZE - 1)
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;
};
#define EFI_MEMORY_DESCRIPTOR_VERSION 1
/* 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,
EFIET_GOP_MODE,
/* 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[];
};
/**
* struct efi_entry_gopmode - a GOP mode table passed to U-Boot
*
* @fb_base: EFI's framebuffer base address
* @fb_size: EFI's framebuffer size
* @info_size: GOP mode info structure size
* @info: Start address of the GOP mode info structure
*/
struct efi_entry_gopmode {
efi_physical_addr_t fb_base;
/*
* Not like the ones in 'struct efi_gop_mode' which are 'unsigned
* long', @fb_size and @info_size have to be 'u64' here. As the EFI
* stub codes may have different bit size from the U-Boot payload,
* using 'long' will cause mismatch between the producer (stub) and
* the consumer (payload).
*/
u64 fb_size;
u64 info_size;
/*
* We cannot directly use 'struct efi_gop_mode_info info[]' here as
* it causes compiler to complain: array type has incomplete element
* type 'struct efi_gop_mode_info'.
*/
struct /* efi_gop_mode_info */ {
u32 version;
u32 width;
u32 height;
u32 pixel_format;
u32 pixel_bitmask[4];
u32 pixels_per_scanline;
} info[];
};
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_bin_start[], _binary_u_boot_bin_end[];
/*
* Variable Attributes
*/
#define EFI_VARIABLE_NON_VOLATILE 0x0000000000000001
#define EFI_VARIABLE_BOOTSERVICE_ACCESS 0x0000000000000002
#define EFI_VARIABLE_RUNTIME_ACCESS 0x0000000000000004
#define EFI_VARIABLE_HARDWARE_ERROR_RECORD 0x0000000000000008
#define EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS 0x0000000000000010
#define EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS 0x0000000000000020
#define EFI_VARIABLE_APPEND_WRITE 0x0000000000000040
#define EFI_VARIABLE_MASK (EFI_VARIABLE_NON_VOLATILE | \
EFI_VARIABLE_BOOTSERVICE_ACCESS | \
EFI_VARIABLE_RUNTIME_ACCESS | \
EFI_VARIABLE_HARDWARE_ERROR_RECORD | \
EFI_VARIABLE_AUTHENTICATED_WRITE_ACCESS | \
EFI_VARIABLE_TIME_BASED_AUTHENTICATED_WRITE_ACCESS | \
EFI_VARIABLE_APPEND_WRITE)
/**
* 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 */
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