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u-boot/include/efi.h
Simon Glass 041840eeeb efi: Split out table-listing code into a new file 
This code is used with EFI_LOADER but is also useful (with some
modifications) for the EFI app and payload. Move it into a shared
file.

Show the address of the table so it can be examined if needed. Also show
the table name as unknown if necessary. Our list of GUIDs is fairly
small.

Signed-off-by: Simon Glass <sjg@chromium.org>
2023-03-25 11:07:22 +01:00

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/* SPDX-License-Identifier: GPL-2.0 */
/*
* 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>
/* Type INTN in UEFI specification */
#define efi_intn_t ssize_t
/* Type UINTN in UEFI specification*/
#define efi_uintn_t size_t
/*
* 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))
#define efi_va_list __builtin_ms_va_list
#define efi_va_start __builtin_ms_va_start
#define efi_va_copy __builtin_ms_va_copy
#define efi_va_arg __builtin_va_arg
#define efi_va_end __builtin_ms_va_end
#else
#define EFIAPI asmlinkage
#define efi_va_list va_list
#define efi_va_start va_start
#define efi_va_copy va_copy
#define efi_va_arg va_arg
#define efi_va_end va_end
#endif /* __x86_64__ */
#define EFI32_LOADER_SIGNATURE "EL32"
#define EFI64_LOADER_SIGNATURE "EL64"
/**
* struct efi_device_path - device path protocol
*
* @type: device path type
* @sub_type: device path sub-type
* @length: length of the device path node including the header
*/
struct efi_device_path {
u8 type;
u8 sub_type;
u16 length;
} __packed;
/*
* The EFI spec defines the EFI_GUID as
* "128-bit buffer containing a unique identifier value. Unless otherwise specified,
* aligned on a 64-bit boundary".
* Page 163 of the UEFI specification v2.10 and
* EDK2 reference implementation both define EFI_GUID as
* struct { u32 a; u16; b; u16 c; u8 d[8]; }; which is 4-byte
* aligned.
*/
typedef struct {
u8 b[16];
} efi_guid_t __attribute__((aligned(4)));
#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_UNKNOWN_GLYPH 1
#define EFI_WARN_DELETE_FAILURE 2
#define EFI_WARN_WRITE_FAILURE 3
#define EFI_WARN_BUFFER_TOO_SMALL 4
#define EFI_WARN_STALE_DATA 5
#define EFI_WARN_FILE_SYSTEM 6
#define EFI_WARN_RESET_REQUIRED 7
typedef unsigned long efi_status_t;
typedef u64 efi_physical_addr_t;
typedef u64 efi_virtual_addr_t;
typedef struct efi_object *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;
};
/* Allocation types for calls to boottime->allocate_pages*/
/**
* enum efi_allocate_type - address restriction for memory allocation
*/
enum efi_allocate_type {
/**
* @EFI_ALLOCATE_ANY_PAGES:
* Allocate any block of sufficient size. Ignore memory address.
*/
EFI_ALLOCATE_ANY_PAGES,
/**
* @EFI_ALLOCATE_MAX_ADDRESS:
* Allocate a memory block with an uppermost address less or equal
* to the indicated address.
*/
EFI_ALLOCATE_MAX_ADDRESS,
/**
* @EFI_ALLOCATE_ADDRESS:
* Allocate a memory block starting at the indicatged adress.
*/
EFI_ALLOCATE_ADDRESS,
/**
* @EFI_MAX_ALLOCATE_TYPE:
* Value use for range checking.
*/
EFI_MAX_ALLOCATE_TYPE,
};
/* Enumeration of memory types introduced in UEFI */
enum efi_memory_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,
/*
* Byte addressable non-volatile memory.
*/
EFI_PERSISTENT_MEMORY_TYPE,
/*
* Unaccepted memory must be accepted by boot target before usage.
*/
EFI_UNACCEPTED_MEMORY_TYPE,
EFI_MAX_MEMORY_TYPE,
};
/* 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_UCE ((u64)0x0000000000000010ULL) /* uncached, exported */
#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_NV ((u64)0x0000000000008000ULL) /* non-volatile */
#define EFI_MEMORY_MORE_RELIABLE \
((u64)0x0000000000010000ULL) /* higher reliability */
#define EFI_MEMORY_RO ((u64)0x0000000000020000ULL) /* read-only */
#define EFI_MEMORY_SP ((u64)0x0000000000040000ULL) /* specific-purpose memory (SPM) */
#define EFI_MEMORY_CPU_CRYPTO ((u64)0x0000000000080000ULL) /* cryptographically protectable */
#define EFI_MEMORY_RUNTIME ((u64)0x8000000000000000ULL) /* range requires runtime mapping */
#define EFI_MEM_DESC_VERSION 1
#define EFI_PAGE_SHIFT 12
#define EFI_PAGE_SIZE (1ULL << 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
/* 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,
EFIET_SYS_TABLE,
/* 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[];
};
/**
* struct efi_entry_systable - system table passed to U-Boot
*
* @sys_table: EFI system table address
*/
struct efi_entry_systable {
efi_physical_addr_t sys_table;
};
static inline struct efi_mem_desc *efi_get_next_mem_desc(
struct efi_mem_desc *desc, int desc_size)
{
return (struct efi_mem_desc *)((ulong)desc + desc_size);
}
/**
* struct efi_priv - Information about the environment provided by EFI
*
* @parent_image: image passed into the EFI app or stub
* @sys_table: Pointer to system table
* @boot: Pointer to boot-services table
* @run: Pointer to runtime-services table
* @memmap_key: Key returned from get_memory_map()
* @memmap_desc: List of memory-map records
* @memmap_alloc: Amount of memory allocated for memory map list
* @memmap_size Size of memory-map list in bytes
* @memmap_desc_size: Size of an individual memory-map record, in bytes
* @memmap_version: Memory-map version
*
* @use_pool_for_malloc: true if all allocation should go through the EFI 'pool'
* methods allocate_pool() and free_pool(); false to use 'pages' methods
* allocate_pages() and free_pages()
* @ram_base: Base address of RAM (size CONFIG_EFI_RAM_SIZE)
* @image_data_type: Type of the loaded image (e.g. EFI_LOADER_CODE)
*
* @info: Header of the info list, holding info collected by the stub and passed
* to U-Boot
* @info_size: Size of the info list @info in bytes
* @next_hdr: Pointer to where to put the next header when adding to the list
*/
struct efi_priv {
efi_handle_t parent_image;
struct efi_system_table *sys_table;
struct efi_boot_services *boot;
struct efi_runtime_services *run;
efi_uintn_t memmap_key;
struct efi_mem_desc *memmap_desc;
efi_uintn_t memmap_alloc;
efi_uintn_t memmap_size;
efi_uintn_t memmap_desc_size;
u32 memmap_version;
/* app: */
bool use_pool_for_malloc;
unsigned long ram_base;
unsigned int image_data_type;
/* stub: */
struct efi_info_hdr *info;
unsigned int info_size;
void *next_hdr;
};
/*
* EFI attributes of the udevice handled by efi_media driver
*
* @handle: handle of the controller on which this driver is installed
* @blkio: block io protocol proxied by this driver
* @device_path: EFI path to the device
*/
struct efi_media_plat {
efi_handle_t handle;
struct efi_block_io *blkio;
struct efi_device_path *device_path;
};
/* 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_priv() - Get access to the EFI-private information
*
* This struct it used by both the stub and the app to record things about the
* EFI environment. It is not available in U-Boot proper after the stub has
* jumped there. Use efi_info_get() to obtain info in that case.
*
* Return: pointer to private info
*/
struct efi_priv *efi_get_priv(void);
/**
* efi_set_priv() - Set up a pointer to the EFI-private information
*
* This is called in the stub and app to record the location of this
* information.
*
* @priv: New location of private data
*/
void efi_set_priv(struct efi_priv *priv);
/**
* efi_get_sys_table() - Get access to the main EFI system table
*
* Returns: pointer to EFI system table
*/
struct efi_system_table *efi_get_sys_table(void);
/**
* efi_get_boot() - Get access to the EFI boot services table
*
* Returns: pointer to EFI boot services table
*/
struct efi_boot_services *efi_get_boot(void);
/**
* efi_get_ram_base() - Find the base of RAM
*
* This is used when U-Boot is built as an EFI application.
*
* Returns: 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()
* Return: 0 on succcess, EFI error code on failure
*/
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
* Returns: 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
*
* This function is called from U-Boot proper to read information set up by the
* EFI stub. It can only be used when running from the EFI stub, not when U-Boot
* is running as an app.
*
* @type: Entry type to search for
* @datap: Returns pointer to entry data
* @sizep: Returns 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_store_memory_map() - Collect the memory-map info from EFI
*
* Collect the memory info and store it for later use, e.g. in calling
* exit_boot_services()
*
* @priv: Pointer to private EFI structure
* Returns: 0 if OK, non-zero on error
*/
int efi_store_memory_map(struct efi_priv *priv);
/**
* efi_call_exit_boot_services() - Handle the exit-boot-service procedure
*
* Tell EFI we don't want their boot services anymore
*
* Return: 0 if OK, non-zero on error
*/
int efi_call_exit_boot_services(void);
/**
* efi_get_mmap() - Get the memory map from EFI
*
* This is used in the app. The caller must free *@descp when done
*
* @descp: Returns allocated pointer to EFI memory map table
* @sizep: Returns size of table in bytes
* @keyp: Returns memory-map key
* @desc_sizep: Returns size of each @desc_base record
* @versionp: Returns version number of memory map
* Returns: 0 on success, -ve on error
*/
int efi_get_mmap(struct efi_mem_desc **descp, int *sizep, uint *keyp,
int *desc_sizep, uint *versionp);
/**
* efi_show_tables() - Show a list of available tables
*
* Shows the address, GUID (and name where known) for each table
*
* @systab: System table containing the list of tables
*/
void efi_show_tables(struct efi_system_table *systab);
#endif /* _LINUX_EFI_H */
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