efi.h

Go to the documentation of this file.

#ifndef _IPXE_EFI_H
#define _IPXE_EFI_H
 
/** @file
 *
 * EFI API
 *
 * The intention is to include near-verbatim copies of the EFI headers
 * required by iPXE.  This is achieved using the import.pl script in
 * this directory.  Run the import script to update the local copies
 * of the headers:
 *
 *     ./import.pl /path/to/edk2/edk2
 *
 * where /path/to/edk2/edk2 is the path to your local checkout of the
 * EFI Development Kit.
 *
 * Note that import.pl will modify any #include lines in each imported
 * header to reflect its new location within the iPXE tree.  It will
 * also tidy up the file by removing carriage return characters and
 * trailing whitespace.
 */
 
FILE_LICENCE ( GPL2_OR_LATER );
FILE_SECBOOT ( PERMITTED );
 
/* EFI headers rudely redefine NULL */
#undef NULL
 
/* EFI headers redefine ARRAY_SIZE */
#undef ARRAY_SIZE
 
/* EFI headers think your compiler uses the MS ABI by default on X64 */
#if __x86_64__
#define EFIAPI __attribute__((ms_abi))
#endif
 
/* EFI headers assume regparm(0) on i386, but that is not the case for iPXE */
#if __i386__
#define EFIAPI __attribute__((cdecl,regparm(0)))
#endif
 
/* EFI headers define EFI_HANDLE and EFI_EVENT as void pointers, which
 * renders type checking somewhat useless.  Work around this bizarre
 * sabotage attempt by redefining both as pointers to anonymous
 * structures.
 *
 * EFI headers perform some ABI validation checks via _Static_assert()
 * that may fail when EFI headers are included on a non-EFI platform.
 * Temporarily disable static assertions to allow these headers to be
 * included.
 */
#define EFI_HANDLE STUPID_EFI_HANDLE
#define EFI_EVENT STUPID_EFI_EVENT
#ifndef PLATFORM_efi
#define _Static_assert(expr, msg)
#endif
#include <ipxe/efi/Uefi/UefiBaseType.h>
#undef EFI_HANDLE
#undef EFI_EVENT
#undef _Static_assert
typedef struct {} *EFI_HANDLE;
typedef struct {} *EFI_EVENT;
 
/* Include the top-level EFI header files */
#include <ipxe/efi/Uefi.h>
#include <ipxe/efi/PiDxe.h>
#include <ipxe/efi/Protocol/LoadedImage.h>
 
/* Reset any trailing #pragma pack directives */
#pragma pack(1)
#pragma pack()
 
#include <ipxe/tables.h>
#include <ipxe/uuid.h>
#include <ipxe/version.h>
#include <ipxe/profile.h>
 
/** An EFI saved task priority level */
struct efi_saved_tpl {
        /** Current external TPL */
        EFI_TPL current;
        /** Previous external TPL */
        EFI_TPL previous;
};
 
/** An EFI dropped task priority level */
struct efi_dropped_tpl {
        /** Current TPL */
        EFI_TPL current;
};
 
/** An EFI protocol used by iPXE */
struct efi_protocol {
        /** GUID */
        EFI_GUID guid;
        /** Variable containing pointer to protocol structure */
        void **protocol;
        /** Protocol is required */
        int required;
};
 
/** EFI protocol table */
#define EFI_PROTOCOLS __table ( struct efi_protocol, "efi_protocols" )
 
/** Declare an EFI protocol used by iPXE */
#define __efi_protocol __table_entry ( EFI_PROTOCOLS, 01 )
 
/** Declare an EFI protocol to be required by iPXE
 *
 * @v _protocol         EFI protocol name
 * @v _ptr              Pointer to protocol instance
 */
#define EFI_REQUIRE_PROTOCOL( _protocol, _ptr )                              \
        struct efi_protocol __ ## _protocol __efi_protocol = {               \
                .guid = _protocol ## _GUID,                                  \
                .protocol = ( ( void ** ) ( void * )                         \
                              ( ( (_ptr) == ( ( _protocol ** ) (_ptr) ) ) ?  \
                                (_ptr) : (_ptr) ) ),                         \
                .required = 1,                                               \
        }
 
/** Declare an EFI protocol to be requested by iPXE
 *
 * @v _protocol         EFI protocol name
 * @v _ptr              Pointer to protocol instance
 */
#define EFI_REQUEST_PROTOCOL( _protocol, _ptr )                              \
        struct efi_protocol __ ## _protocol __efi_protocol = {               \
                .guid = _protocol ## _GUID,                                  \
                .protocol = ( ( void ** ) ( void * )                         \
                              ( ( (_ptr) == ( ( _protocol ** ) (_ptr) ) ) ?  \
                                (_ptr) : (_ptr) ) ),                         \
                .required = 0,                                               \
        }
 
/** An EFI configuration table used by iPXE */
struct efi_config_table {
        /** GUID */
        EFI_GUID guid;
        /** Variable containing pointer to configuration table */
        void **table;
        /** Table is required for operation */
        int required;
};
 
/** EFI configuration table table */
#define EFI_CONFIG_TABLES \
        __table ( struct efi_config_table, "efi_config_tables" )
 
/** Declare an EFI configuration table used by iPXE */
#define __efi_config_table __table_entry ( EFI_CONFIG_TABLES, 01 )
 
/** Declare an EFI configuration table to be used by iPXE
 *
 * @v _table            EFI configuration table name
 * @v _ptr              Pointer to configuration table
 * @v _required         Table is required for operation
 */
#define EFI_USE_TABLE( _table, _ptr, _required )                             \
        struct efi_config_table __ ## _table __efi_config_table = {          \
                .guid = _table ## _GUID,                                     \
                .table = ( ( void ** ) ( void * ) (_ptr) ),                  \
                .required = (_required),                                     \
        }
 
/**
 * Convert an iPXE status code to an EFI status code
 *
 * @v rc                iPXE status code
 * @ret efirc           EFI status code
 */
#define EFIRC( rc ) ERRNO_TO_PLATFORM ( -(rc) )
 
/**
 * Convert an EFI status code to an iPXE status code
 *
 * @v efirc             EFI status code
 * @ret rc              iPXE status code (before negation)
 */
#define EEFI( efirc ) EPLATFORM ( EINFO_EPLATFORM, efirc )
 
extern EFI_GUID efi_absolute_pointer_protocol_guid;
extern EFI_GUID efi_acpi_table_protocol_guid;
extern EFI_GUID efi_adapter_information_protocol_guid;
extern EFI_GUID efi_apple_net_boot_protocol_guid;
extern EFI_GUID efi_arp_protocol_guid;
extern EFI_GUID efi_arp_service_binding_protocol_guid;
extern EFI_GUID efi_block_io_protocol_guid;
extern EFI_GUID efi_block_io2_protocol_guid;
extern EFI_GUID efi_bus_specific_driver_override_protocol_guid;
extern EFI_GUID efi_component_name_protocol_guid;
extern EFI_GUID efi_component_name2_protocol_guid;
extern EFI_GUID efi_console_control_protocol_guid;
extern EFI_GUID efi_device_path_protocol_guid;
extern EFI_GUID efi_dhcp4_protocol_guid;
extern EFI_GUID efi_dhcp4_service_binding_protocol_guid;
extern EFI_GUID efi_dhcp6_protocol_guid;
extern EFI_GUID efi_dhcp6_service_binding_protocol_guid;
extern EFI_GUID efi_disk_io_protocol_guid;
extern EFI_GUID efi_dns4_protocol_guid;
extern EFI_GUID efi_dns4_service_binding_protocol_guid;
extern EFI_GUID efi_dns6_protocol_guid;
extern EFI_GUID efi_dns6_service_binding_protocol_guid;
extern EFI_GUID efi_driver_binding_protocol_guid;
extern EFI_GUID efi_eap_configuration_protocol_guid;
extern EFI_GUID efi_graphics_output_protocol_guid;
extern EFI_GUID efi_hii_config_access_protocol_guid;
extern EFI_GUID efi_hii_font_protocol_guid;
extern EFI_GUID efi_http_protocol_guid;
extern EFI_GUID efi_http_service_binding_protocol_guid;
extern EFI_GUID efi_ip4_protocol_guid;
extern EFI_GUID efi_ip4_config_protocol_guid;
extern EFI_GUID efi_ip4_config2_protocol_guid;
extern EFI_GUID efi_ip4_service_binding_protocol_guid;
extern EFI_GUID efi_ip6_protocol_guid;
extern EFI_GUID efi_ip6_config_protocol_guid;
extern EFI_GUID efi_ip6_service_binding_protocol_guid;
extern EFI_GUID efi_load_file_protocol_guid;
extern EFI_GUID efi_load_file2_protocol_guid;
extern EFI_GUID efi_loaded_image_protocol_guid;
extern EFI_GUID efi_loaded_image_device_path_protocol_guid;
extern EFI_GUID efi_managed_network_protocol_guid;
extern EFI_GUID efi_managed_network_service_binding_protocol_guid;
extern EFI_GUID efi_mtftp4_protocol_guid;
extern EFI_GUID efi_mtftp4_service_binding_protocol_guid;
extern EFI_GUID efi_mtftp6_protocol_guid;
extern EFI_GUID efi_mtftp6_service_binding_protocol_guid;
extern EFI_GUID efi_nii_protocol_guid;
extern EFI_GUID efi_nii31_protocol_guid;
extern EFI_GUID efi_pci_io_protocol_guid;
extern EFI_GUID efi_pci_root_bridge_io_protocol_guid;
extern EFI_GUID efi_pxe_base_code_protocol_guid;
extern EFI_GUID efi_rng_protocol_guid;
extern EFI_GUID efi_serial_io_protocol_guid;
extern EFI_GUID efi_shim_lock_protocol_guid;
extern EFI_GUID efi_simple_file_system_protocol_guid;
extern EFI_GUID efi_simple_network_protocol_guid;
extern EFI_GUID efi_simple_pointer_protocol_guid;
extern EFI_GUID efi_simple_text_input_protocol_guid;
extern EFI_GUID efi_simple_text_input_ex_protocol_guid;
extern EFI_GUID efi_simple_text_output_protocol_guid;
extern EFI_GUID efi_storage_security_command_protocol_guid;
extern EFI_GUID efi_supplicant_protocol_guid;
extern EFI_GUID efi_tcg_protocol_guid;
extern EFI_GUID efi_tcg2_protocol_guid;
extern EFI_GUID efi_tcp4_protocol_guid;
extern EFI_GUID efi_tcp4_service_binding_protocol_guid;
extern EFI_GUID efi_tcp6_protocol_guid;
extern EFI_GUID efi_tcp6_service_binding_protocol_guid;
extern EFI_GUID efi_tree_protocol_guid;
extern EFI_GUID efi_udp4_protocol_guid;
extern EFI_GUID efi_udp4_service_binding_protocol_guid;
extern EFI_GUID efi_udp6_protocol_guid;
extern EFI_GUID efi_udp6_service_binding_protocol_guid;
extern EFI_GUID efi_uga_draw_protocol_guid;
extern EFI_GUID efi_unicode_collation_protocol_guid;
extern EFI_GUID efi_usb_hc_protocol_guid;
extern EFI_GUID efi_usb2_hc_protocol_guid;
extern EFI_GUID efi_usb_io_protocol_guid;
extern EFI_GUID efi_vlan_config_protocol_guid;
extern EFI_GUID efi_wifi2_protocol_guid;
 
extern EFI_GUID efi_acpi_10_table_guid;
extern EFI_GUID efi_acpi_20_table_guid;
extern EFI_GUID efi_fdt_table_guid;
extern EFI_GUID efi_smbios_table_guid;
extern EFI_GUID efi_smbios2_table_guid;
 
extern EFI_GUID efi_cert_x509_guid;
extern EFI_GUID efi_file_info_id;
extern EFI_GUID efi_file_system_info_id;
extern EFI_GUID efi_global_variable;
extern EFI_GUID efi_image_security_database_guid;
extern EFI_GUID efi_microsoft_vendor_guid;
extern EFI_GUID efi_tls_ca_certificate_guid;
 
extern EFI_HANDLE efi_image_handle;
extern EFI_LOADED_IMAGE_PROTOCOL *efi_loaded_image;
extern EFI_DEVICE_PATH_PROTOCOL *efi_loaded_image_path;
extern EFI_SYSTEM_TABLE *efi_systab;
extern EFI_TPL efi_internal_tpl;
extern EFI_TPL efi_external_tpl;
extern int efi_shutdown_in_progress;
 
extern const __attribute__ (( pure )) char *
efi_guid_ntoa ( CONST EFI_GUID *guid );
extern const __attribute__ (( pure )) char *
efi_tpl_name ( EFI_TPL tpl );
extern const __attribute__ (( pure )) char *
efi_locate_search_type_name ( EFI_LOCATE_SEARCH_TYPE search_type );
extern const __attribute__ (( pure )) char *
efi_open_attributes_name ( unsigned int attributes );
extern const __attribute__ (( pure )) char *
efi_devpath_text ( EFI_DEVICE_PATH_PROTOCOL *path );
extern const __attribute__ (( pure )) char *
efi_handle_name ( EFI_HANDLE handle );
 
extern void dbg_efi_opener ( EFI_HANDLE handle, EFI_GUID *protocol,
                             EFI_OPEN_PROTOCOL_INFORMATION_ENTRY *opener );
extern void dbg_efi_openers ( EFI_HANDLE handle, EFI_GUID *protocol );
extern void dbg_efi_protocol ( EFI_HANDLE handle, EFI_GUID *protocol );
extern void dbg_efi_protocols ( EFI_HANDLE handle );
 
#define DBG_EFI_OPENER_IF( level, handle, protocol,             \
                           opener ) do {                        \
                if ( DBG_ ## level ) {                          \
                        dbg_efi_opener ( handle, protocol,      \
                                         opener );              \
                }                                               \
        } while ( 0 )
 
#define DBG_EFI_OPENERS_IF( level, handle, protocol ) do {      \
                if ( DBG_ ## level ) {                          \
                        dbg_efi_openers ( handle, protocol );   \
                }                                               \
        } while ( 0 )
 
#define DBG_EFI_PROTOCOLS_IF( level, handle ) do {              \
                if ( DBG_ ## level ) {                          \
                        dbg_efi_protocols ( handle );           \
                }                                               \
        } while ( 0 )
 
#define DBGC_EFI_OPENER_IF( level, id, ... ) do {               \
                DBG_AC_IF ( level, id );                        \
                DBG_EFI_OPENER_IF ( level, __VA_ARGS__ );       \
                DBG_DC_IF ( level );                            \
        } while ( 0 )
 
#define DBGC_EFI_OPENERS_IF( level, id, ... ) do {              \
                DBG_AC_IF ( level, id );                        \
                DBG_EFI_OPENERS_IF ( level, __VA_ARGS__ );      \
                DBG_DC_IF ( level );                            \
        } while ( 0 )
 
#define DBGC_EFI_PROTOCOL_IF( level, id, ... ) do {             \
                DBG_AC_IF ( level, id );                        \
                DBG_EFI_PROTOCOL_IF ( level, __VA_ARGS__ );     \
                DBG_DC_IF ( level );                            \
        } while ( 0 )
 
#define DBGC_EFI_PROTOCOLS_IF( level, id, ... ) do {            \
                DBG_AC_IF ( level, id );                        \
                DBG_EFI_PROTOCOLS_IF ( level, __VA_ARGS__ );    \
                DBG_DC_IF ( level );                            \
        } while ( 0 )
 
#define DBGC_EFI_OPENER( ... )                                  \
        DBGC_EFI_OPENER_IF ( LOG, ##__VA_ARGS__ )
#define DBGC_EFI_OPENERS( ... )                                 \
        DBGC_EFI_OPENERS_IF ( LOG, ##__VA_ARGS__ )
#define DBGC_EFI_PROTOCOL( ... )                                \
        DBGC_EFI_PROTOCOL_IF ( LOG, ##__VA_ARGS__ )
#define DBGC_EFI_PROTOCOLS( ... )                               \
        DBGC_EFI_PROTOCOLS_IF ( LOG, ##__VA_ARGS__ )
 
#define DBGC2_EFI_OPENER( ... )                                 \
        DBGC_EFI_OPENER_IF ( EXTRA, ##__VA_ARGS__ )
#define DBGC2_EFI_OPENERS( ... )                                \
        DBGC_EFI_OPENERS_IF ( EXTRA, ##__VA_ARGS__ )
#define DBGC2_EFI_PROTOCOL( ... )                               \
        DBGC_EFI_PROTOCOL_IF ( EXTRA, ##__VA_ARGS__ )
#define DBGC2_EFI_PROTOCOLS( ... )                              \
        DBGC_EFI_PROTOCOLS_IF ( EXTRA, ##__VA_ARGS__ )
 
#define DBGCP_EFI_OPENER( ... )                                 \
        DBGC_EFI_OPENER_IF ( PROFILE, ##__VA_ARGS__ )
#define DBGCP_EFI_OPENERS( ... )                                \
        DBGC_EFI_OPENERS_IF ( PROFILE, ##__VA_ARGS__ )
#define DBGCP_EFI_PROTOCOL( ... )                               \
        DBGC_EFI_PROTOCOL_IF ( PROFILE, ##__VA_ARGS__ )
#define DBGCP_EFI_PROTOCOLS( ... )                              \
        DBGC_EFI_PROTOCOLS_IF ( PROFILE, ##__VA_ARGS__ )
 
/* Allow for EFI-only interface operations */
#ifdef PLATFORM_efi
#define EFI_INTF_OP INTF_OP
#else
#define EFI_INTF_OP UNUSED_INTF_OP
#endif
 
extern unsigned long __stack_chk_guard;
extern unsigned long efi_stack_cookie ( EFI_HANDLE handle );
extern void __stack_chk_fail ( void );
 
/**
 * Initialise stack cookie
 *
 * @v handle            Image handle
 */
static inline __attribute__ (( always_inline )) void
efi_init_stack_guard ( EFI_HANDLE handle ) {
 
        /* The calling function must not itself use stack protection,
         * since the change in the stack guard value would trigger a
         * false positive.
         *
         * There is unfortunately no way to annotate a function to
         * exclude the use of stack protection.  We must therefore
         * rely on correctly anticipating the compiler's decision on
         * the use of stack protection.
         *
         * The calculation of the stack cookie value deliberately
         * takes the address of a stack variable (to provide an
         * additional source of entropy).  This operation would
         * trigger the application of stack protection to the calling
         * function, and so must be externalised.
         */
        __stack_chk_guard = efi_stack_cookie ( handle );
}
 
extern EFI_STATUS efi_init ( EFI_HANDLE image_handle,
                             EFI_SYSTEM_TABLE *systab );
extern void efi_raise_tpl ( struct efi_saved_tpl *tpl );
extern void efi_restore_tpl ( struct efi_saved_tpl *tpl );
extern void efi_drop_tpl ( struct efi_dropped_tpl *tpl );
extern void efi_undrop_tpl ( struct efi_dropped_tpl *tpl );
extern int efi_open_untyped ( EFI_HANDLE handle, EFI_GUID *protocol,
                              void **interface );
extern int efi_open_unsafe_untyped ( EFI_HANDLE handle, EFI_GUID *protocol,
                                     void **interface );
extern void efi_close_unsafe ( EFI_HANDLE handle, EFI_GUID *protocol );
extern int efi_open_by_driver_untyped ( EFI_HANDLE handle, EFI_GUID *protocol,
                                        void **interface );
extern void efi_close_by_driver ( EFI_HANDLE handle, EFI_GUID *protocol );
extern int efi_open_by_child_untyped ( EFI_HANDLE handle, EFI_GUID *protocol,
                                       EFI_HANDLE child, void **interface );
extern void efi_close_by_child ( EFI_HANDLE handle, EFI_GUID *protocol,
                                 EFI_HANDLE child );
extern int efi_connect ( EFI_HANDLE device, EFI_HANDLE driver );
extern int efi_disconnect ( EFI_HANDLE device, EFI_HANDLE driver );
 
/**
 * Test protocol existence
 *
 * @v handle            EFI handle
 * @v protocol          Protocol GUID
 * @ret rc              Return status code
 */
#define efi_test( handle, protocol )                                    \
        efi_open_untyped ( (handle), (protocol), NULL )
 
/**
 * Open protocol for ephemeral use
 *
 * @v handle            EFI handle
 * @v protocol          Protocol GUID
 * @v interface         Protocol interface pointer to fill in
 * @ret rc              Return status code
 */
#define efi_open( handle, protocol, interface ) ( {                     \
        typeof ( *(interface) ) check_ptr_ptr = NULL;                   \
        efi_open_untyped ( (handle), (protocol),                        \
                           ( ( void ) check_ptr_ptr,                    \
                             ( void ** ) (interface) ) );               \
        } )
 
/**
 * Open protocol for unsafe persistent use
 *
 * @v handle            EFI handle
 * @v protocol          Protocol GUID
 * @v interface         Protocol interface pointer to fill in
 * @ret rc              Return status code
 */
#define efi_open_unsafe( handle, protocol, interface ) ( {              \
        typeof ( *(interface) ) check_ptr_ptr = NULL;                   \
        efi_open_unsafe_untyped ( (handle), (protocol),                 \
                                  ( ( void ) check_ptr_ptr,             \
                                    ( void ** ) (interface) ) );        \
        } )
 
/**
 * Open protocol for persistent use by a driver
 *
 * @v handle            EFI handle
 * @v protocol          Protocol GUID
 * @v interface         Protocol interface pointer to fill in
 * @ret rc              Return status code
 */
#define efi_open_by_driver( handle, protocol, interface ) ( {           \
        typeof ( *(interface) ) check_ptr_ptr = NULL;                   \
        efi_open_by_driver_untyped ( (handle), (protocol),              \
                                     ( ( void ) check_ptr_ptr,          \
                                       ( void ** ) (interface) ) );     \
        } )
 
/**
 * Open protocol for persistent use by a child controller
 *
 * @v handle            EFI handle
 * @v protocol          Protocol GUID
 * @v child             Child controller handle
 * @v interface         Protocol interface pointer to fill in
 * @ret rc              Return status code
 */
#define efi_open_by_child( handle, protocol, child, interface ) ( {     \
        typeof ( *(interface) ) check_ptr_ptr = NULL;                   \
        efi_open_by_child_untyped ( (handle), (protocol), (child),      \
                                    ( ( void ) check_ptr_ptr,           \
                                      ( void ** ) (interface) ) );      \
        } )
 
#endif /* _IPXE_EFI_H */