Tianocore/edk2.git/MdeModulePkg/Core/Dxe/Gcd/Gcd.c, branch master

MdeModulePkg: DxeCore: Update Memory Statistics from PEI

2026-06-24T15:53:58+00:00

If memory bins are enabled for PEI, PEI will produce Memory Allocation HOBs marked with gEfiMemoryTypeInformationGuid. If these exist, DXE core will now process the stats from them to have accurate numbers. Signed-off-by: Oliver Smith-Denny

MdeModulePkg: Dxe Core: Split Memory Bin Logic Into Separate File

2026-06-24T15:53:58+00:00

This commits splits out logic currently contained in Gcd.c and Page.c to a new file called MemoryBin.c. This is set up in preparation to add support to PEI for memory bins (an S4 resume stability feature). MemoryBin.c takes all global state in as parameters so that DXE core can use globals and PEI core can use HOBs. There is no logic change here, just consolidating the functionality to share with PEI. This was requested not to be a library. Signed-off-by: Oliver Smith-Denny

MdeModulePkg: Dxe Core: Prep CoreSetMemoryTypeInformationRange for PEI

2026-06-24T15:53:58+00:00

Migrate CoreSetMemoryTypeInformationRange() to not use globals so it can be used in PEI as well. This temporarily moves the EFI_MEMORY_STATISTICS structure to DxeMain.h so that it can be used in Gcd.c as well as Page.c. This will migrate to a different private header once that is included. Signed-off-by: Oliver Smith-Denny

MdeModulePkg: DxeCore: Add GetMemoryTypeInformationResourceHob Helper

2026-06-24T15:53:58+00:00

In preparation for sharing memory bin logic with PEI, create a helper function that finds and validates a resource descriptor HOB owned by gEfiMemoryTypeInformationGuid. Signed-off-by: Oliver Smith-Denny

MdeModulePkg: DxeCore: Create PopulateMemoryTypeInformation Helper

2026-06-24T15:53:58+00:00

In preparation for supporting shared memory bin logic in DXE and PEI, create a PopulateMemoryTypeInformation() helper function. This function searches for a Memory Type Information Hob and populates an EFI_MEMORY_TYPE_INFORMATION struct with it. Signed-off-by: Oliver Smith-Denny

MdeModulePkg: Dxe Core: Update Bin Size Helper Fn

2026-06-24T15:53:58+00:00

In preparation for sharing memory bin logic between PEI and DXE, update CaclulateTotalMemoryBinSizeNeeded() to take gMemoryTypeInformation by reference. Signed-off-by: Oliver Smith-Denny

MdeModulePkg/Core/Dxe/Gcd: make persistent override special-purpose

2026-06-23T14:24:18+00:00

Fix the GCD memory type selection logic in DXE GCD initialization so persistent memory correctly takes precedence over special-purpose memory when both attributes are present. The existing code/comment said persistent should win, but the condition order allowed special-purpose to overwrite persistent. This change swaps the checks so behavior matches the intended precedence and comment. Signed-off-by: Sureshkumar Ponnusamy

MdeModulePkg: Dxe Core: Use CalculateTotalMemoryBinSizeNeeded()

2026-06-08T16:20:28+00:00

CoreSetMemoryTypeInformationRange() currently calculates the bin size needed independently from the CalculateTotalMemoryBinSizeNeeded() function. This commit updates to use that function and remove the duplication. Signed-off-by: Oliver Smith-Denny

MdeModulePkg: GCD: Use Alignment Requirement in Bin Size Calc

2026-06-08T16:20:28+00:00

Currently CalculateTotalMemoryBinSizeNeeded() does not take runtime alignment granularity considerations into account. This means that the GCD initialization code can choose resource desc HOBs to use for the bin region that are actually too small and fail to initialize the bins. This fixes CalculateTotalMemoryBinSizeNeeded() to take the alignment requirements into consideration, both for size and for alignment of the bin address range. Signed-off-by: Oliver Smith-Denny

MdeModulePkg: Fix missing NULL tests.

2025-11-22T18:58:47+00:00

https://github.com/github/codeql/blob/codeql-cli-2.7.3/cpp/ql/src/Critical/MissingNullTest.qhelp For items which allocate memory, or get a pointer from another structure, it is important to validate that the pointers are not null before they are dereferenced. Signed-off-by: Aaron Pop