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https://github.com/ipxe/ipxe
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81d92c6d34
We have EFI APIs for CPU I/O, PCI I/O, timers, console I/O, user access and user memory allocation. EFI executables are created using the vanilla GNU toolchain, with the EXE header handcrafted in assembly and relocations generated by a custom efilink utility.
90 lines
2.6 KiB
C
90 lines
2.6 KiB
C
#ifndef _EFI_H
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#define _EFI_H
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/** @file
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*
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* EFI API
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*
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* The intention is to include near-verbatim copies of the EFI headers
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* required by gPXE. This is achieved using the import.pl script in
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* this directory. Run the import script to update the local copies
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* of the headers:
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*
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* ./import.pl /path/to/edk2/edk2
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*
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* where /path/to/edk2/edk2 is the path to your local checkout of the
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* EFI Development Kit.
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*
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* Note that import.pl will modify any #include lines in each imported
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* header to reflect its new location within the gPXE tree. It will
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* also tidy up the file by removing carriage return characters and
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* trailing whitespace.
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*
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*
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* At the time of writing, there are a few other modifications to
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* these headers that are present in my personal edk2 tree, that are
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* not yet committed back to the main edk2 repository. These
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* modifications are fixes for compilation on case-dependent
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* filesystems, compilation under -mrtd and -mregparm=3, etc.
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*/
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/* Include the top-level EFI header file */
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#include <gpxe/efi/Uefi.h>
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/* Reset any trailing #pragma pack directives */
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#pragma pack()
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#include <gpxe/tables.h>
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#include <gpxe/uuid.h>
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/** An EFI protocol used by gPXE */
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struct efi_protocol {
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union {
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/** EFI protocol GUID */
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EFI_GUID guid;
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/** UUID structure understood by gPXE */
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union uuid uuid;
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} u;
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/** Variable containing pointer to protocol structure */
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void **protocol;
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};
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/** Declare an EFI protocol used by gPXE */
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#define __efi_protocol \
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__table ( struct efi_protocol, efi_protocols, 01 )
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/** Declare an EFI protocol to be required by gPXE
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*
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* @v _protocol EFI protocol name
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* @v _ptr Pointer to protocol instance
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*/
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#define EFI_REQUIRE_PROTOCOL( _protocol, _ptr ) \
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struct efi_protocol __ ## _protocol __efi_protocol = { \
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.u.guid = _protocol ## _GUID, \
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.protocol = ( ( void ** ) ( void * ) \
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( ( (_ptr) == ( ( _protocol ** ) NULL ) ) ? \
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(_ptr) : (_ptr) ) ), \
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}
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/** Convert a gPXE status code to an EFI status code
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*
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* FIXME: actually perform some kind of conversion. gPXE error codes
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* will be detected as EFI error codes; both have the top bit set, and
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* the success return code is zero for both. Anything that just
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* reports a numerical error will be OK, anything attempting to
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* interpret the value or to display a text equivalent will be
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* screwed.
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*/
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#define RC_TO_EFIRC( rc ) (rc)
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/** Convert an EFI status code to a gPXE status code
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*
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* FIXME: as above
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*/
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#define EFIRC_TO_RC( efirc ) (efirc)
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extern EFI_HANDLE efi_image_handle;
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extern EFI_SYSTEM_TABLE *efi_systab;
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#endif /* _EFI_H */
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