arch/powerpc/kernel/ucall.S

File Facts

System

Linux kernel

Corpus path

arch/powerpc/kernel/ucall.S

Extension

.S

Size

306 bytes

Lines

15

Domain

Architecture Layer

Bucket

arch/powerpc

Inferred role

Architecture Layer: exported/initcall integration point

Status

integration implementation candidate

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.
• Exports symbols or registers init work; inspect boot/module ordering and who consumes the exported contract.

Dependency Surface

• linux/export.h
• asm/ppc_asm.h

Detected Declarations

• export ucall_norets

Annotated Snippet

#include <linux/export.h>
#include <asm/ppc_asm.h>

_GLOBAL(ucall_norets)
EXPORT_SYMBOL_GPL(ucall_norets)
	sc	2	/* Invoke the ultravisor */
	blr		/* Return r3 = status */

Annotation

• Immediate include surface: `linux/export.h`, `asm/ppc_asm.h`.
• Detected declarations: `export ucall_norets`.
• Atlas domain: Architecture Layer / arch/powerpc.
• Implementation status: integration 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.