arch/s390/include/asm/tod_types.h

File Facts

System

Linux kernel

Corpus path

arch/s390/include/asm/tod_types.h

Extension

.h

Size

615 bytes

Lines

31

Domain

Architecture Layer

Bucket

arch/s390

Inferred role

Architecture Layer: implementation source

Status

source 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.

Dependency Surface

• linux/types.h

Detected Declarations

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

Annotated Snippet

#ifndef _ASM_S390_TOD_TYPES_H
#define _ASM_S390_TOD_TYPES_H

#include <linux/types.h>

#ifndef __ASSEMBLER__

union tod_clock {
	__uint128_t val;
	struct {
		__uint128_t ei	:  8; /* epoch index */
		__uint128_t tod : 64; /* bits 0-63 of tod clock */
		__uint128_t	: 40;
		__uint128_t pf	: 16; /* programmable field */
	};
	struct {
		__uint128_t eitod : 72; /* epoch index + bits 0-63 tod clock */
		__uint128_t	  : 56;
	};
	struct {
		__uint128_t us	: 60; /* micro-seconds */
		__uint128_t sus	: 12; /* sub-microseconds */
		__uint128_t	: 56;
	};
} __packed;

#endif
#endif

Annotation

• Immediate include surface: `linux/types.h`.
• Atlas domain: Architecture Layer / arch/s390.
• 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.