Assumes X64.

Requires <stdint.h>.

These are incomplete and you should probably use the official headers from Tianocore.

You could build a "Hello World" application just by including <efi.h> and using the declarations there. Everything needed to reference the Boot Services, Runtime Services, Configuration Table, System Table and base types are included in <efi.h>.

Using protocols requires including the appropriate protocol header. The naming convention for the include filename is to use the name of the structure, as it appears in the UEFI specification, and naming the file using the first letter of each component of the structure name. For example, the EfiGraphicsOutputProtocol is defined in protocol/efi-gop.h.

Please let me know of any mistakes. I'm also willing to add things as a favor. As it stands, I've only included components that I'm actually using.

efi-bs.h

boot services

efi-ct.h

configuration table

efi.h

base system

efi-rs.h

runtime services

efi-st.h

system table

efi-time.h

time representation

protocol/

efi protocols

protocol/efi-acpitp.h

acpi table protocol

protocol/efi-dpp.h

device path protocol

protocol/efi-fp.h

file protocol

protocol/efi-gop.h

graphics output protocol

protocol/efi-lidpp.h

loaded image device path protocol

protocol/efi-lip.h

loaded image protocol

protocol/efi-sfsp.h

simple file system protocol

protocol/efi-stip.h

simple text input protocol

protocol/efi-stop.h

simple text output protocol