drivers/firmware/efi/libstub/mem.c

File Facts

System

Linux kernel

Corpus path

drivers/firmware/efi/libstub/mem.c

Extension

.c

Size

5930 bytes

Lines

209

Domain

Driver Families

Bucket

drivers/firmware

Inferred role

Driver Families: implementation source

Status

source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

• Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/efi.h
• asm/efi.h
• efistub.h

Detected Declarations

• function efi_get_memory_map
• function efi_allocate_pages
• function efi_free
• function efi_low_alloc_above

Annotated Snippet

if (status == EFI_SUCCESS) {
			*addr = start;
			break;
		}
	}

	if (i == map->map_size / map->desc_size)
		return EFI_NOT_FOUND;

	return EFI_SUCCESS;
}

Annotation

• Immediate include surface: `linux/efi.h`, `asm/efi.h`, `efistub.h`.
• Detected declarations: `function efi_get_memory_map`, `function efi_allocate_pages`, `function efi_free`, `function efi_low_alloc_above`.
• Atlas domain: Driver Families / drivers/firmware.
• Implementation status: source implementation candidate.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.