Tianocore/edk2.git/UefiPayloadPkg/Include/Library/PlatformSupportLib.h, branch master

UefiPayloadPkg: Replace include guards with #pragma once

2026-02-23T21:01:28+00:00

Replace traditional `#ifndef`/`#define`/`#endif` include guards with `#pragma` once. `#pragma once` is a widely supported preprocessor directive that prevents header files from being included multiple times. It is supported by all toolchains used to build edk2: GCC, Clang/LLVM, and MSVC. Compared to macro-based include guards, `#pragma once`: - Eliminates the risk of macro name collisions or copy/paste errors where two headers inadvertently use the same guard macro. - Eliminate inconsistency in the way include guard macros are named (e.g., some files use `__FILE_H__`, others use `FILE_H_`, etc.). - Reduces boilerplate (three lines replaced by one). - Avoids polluting the macro namespace with guard symbols. - Can improve build times as the preprocessor can skip re-opening the file entirely, rather than re-reading it to find the matching `#endif` ("multiple-include optimization"). - Note that some compilers may already optimize traditional include guards, by recognzining the idiomatic pattern. This change is made acknowledging that overall portability of the code will technically be reduced, as `#pragma once` is not part of the C/C++ standards. However, this is considered acceptable given: 1. edk2 already defines a subset of supported compilers in BaseTools/Conf/tools_def.template, all of which have supported `#pragma once` for over two decades. 2. There have been concerns raised to the project about inconsistent include guard naming and potential macro collisions. Approximate compiler support dates: - MSVC: Supported since Visual C++ 4.2 (1996) - GCC: Supported since 3.4 (2004) (http://gnu.ist.utl.pt/software/gcc/gcc-3.4/changes.html) - Clang (LLVM based): Since initial release in 2007 Signed-off-by: Michael Kubacki

UefiPayloadPkg: Apply uncrustify changes

2021-12-07T17:24:28+00:00

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3737 Apply uncrustify changes to .c/.h files in the UefiPayloadPkg package Cc: Andrew Fish Cc: Leif Lindholm Cc: Michael D Kinney Signed-off-by: Michael Kubacki Reviewed-by: Ray Ni

UefiPayloadPkg: Fix ECC reported issues

2021-10-19T04:27:41+00:00

V2: Fix more header files on #ifdef variable ECC reported some issues on UefiPayloadPkg, this patch fixed most of them except several files including ElfLib\Elf32.h, coreboot.h, CbParseLib.c, etc. It also removed unused functions in ResetSystemLib and Hob.c. Signed-off-by: Guo Dong Cc: Ray Ni Cc: Maurice Ma Cc: Benjamin You Reviewed-by: Maurice Ma

UefiPayloadPkg: Enhance UEFI payload for coreboot and Slim Bootloader

2019-04-15T19:30:05+00:00

CorebootModulePkg and CorebootPayloadPkg originally supports coreboot only. In order to support other bootloaders, such as Slim Bootloader, they need be updated to be more generic. UEFI Payload (UefiPayloadPkg) a converged package from CorebootModulePkg and CorebootPayloadPkg with following updates: a. Support both coreboot and Slim Bootloader b. Removed SataControllerDxe and BaseSerialPortLib16550 to use EDK2 modules c. Support passing bootloader parameter to UEFI payload, e.g. coreboot table from coreboot or HOB list from Slim Bootloader d. Using GraphicsOutputDxe from EDK2 with minor change instead of FbGop e. Remove the dependency to IntelFrameworkPkg and IntelFrameworkModulePkg and QuarkSocPkg f. Use BaseDebugLibSerialPort library as DebugLib g. Use HPET timer, drop legacy 8254 timer support h. Use BaseXApicX2ApicLib instead of BaseXApicLib i. Remove HOB gUefiFrameBufferInfoGuid to use EDK2 graphics HOBs. j. Other clean ups On how UefiPayloadPkg could work with coreboot/Slim Bootloader, please refer UefiPayloadPkg/BuildAndIntegrationInstructions.txt Once UefiPayloadPkg is checked-in, CorebootModulePkg and CorebootPayloadPkg could be retired. Signed-off-by: Guo Dong Reviewed-by: Maurice Ma