arch/nios2/kernel/head.S

File Facts

System

Linux kernel

Corpus path

arch/nios2/kernel/head.S

Extension

.S

Size

3944 bytes

Lines

166

Domain

Architecture Layer

Bucket

arch/nios2

Inferred role

Architecture Layer: arch/nios2

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.

Dependency Surface

• linux/init.h
• linux/linkage.h
• asm/thread_info.h
• asm/processor.h
• asm/cache.h
• asm/page.h
• asm/asm-offsets.h
• asm/asm-macros.h

Detected Declarations

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

Annotated Snippet

movia	r1, start_kernel	/* call start_kernel as a subroutine */
	callr	r1

	/* If we return from start_kernel, break to the oci debugger and
	 * buggered we are.
	 */
	break

	/* End of startup code */
.set at

Annotation

• Immediate include surface: `linux/init.h`, `linux/linkage.h`, `asm/thread_info.h`, `asm/processor.h`, `asm/cache.h`, `asm/page.h`, `asm/asm-offsets.h`, `asm/asm-macros.h`.
• Atlas domain: Architecture Layer / arch/nios2.
• 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.