arch/hexagon/kernel/head.S

File Facts

System

Linux kernel

Corpus path

arch/hexagon/kernel/head.S

Extension

.S

Size

5466 bytes

Lines

219

Domain

Architecture Layer

Bucket

arch/hexagon

Inferred role

Architecture Layer: arch/hexagon

Status

atlas-only

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

• CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/linkage.h
• linux/init.h
• asm/asm-offsets.h
• asm/mem-layout.h
• asm/vm_mmu.h
• asm/page.h
• asm/hexagon_vm.h

Detected Declarations

• No top-level syscall, struct, function, initcall, or export declaration detected by the generator.

Annotated Snippet

call start_kernel

	/*
	 * Should not reach here.
	 */
1:
	jump 1b

.p2align PAGE_SHIFT
ENTRY(external_cmdline_buffer)
        .fill _PAGE_SIZE,1,0

Annotation

• Immediate include surface: `linux/linkage.h`, `linux/init.h`, `asm/asm-offsets.h`, `asm/mem-layout.h`, `asm/vm_mmu.h`, `asm/page.h`, `asm/hexagon_vm.h`.
• Atlas domain: Architecture Layer / arch/hexagon.
• Implementation status: atlas-only.

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.