arch/powerpc/include/uapi/asm/nvram.h

File Facts

System

Linux kernel

Corpus path

arch/powerpc/include/uapi/asm/nvram.h

Extension

.h

Size

2077 bytes

Lines

64

Domain

Architecture Layer

Bucket

arch/powerpc

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.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• No C-style include directives detected by the generator.

Detected Declarations

• struct pmac_machine_location

Annotated Snippet

struct pmac_machine_location {
	unsigned int	latitude;	/* 2+30 bit Fractional number */
	unsigned int	longitude;	/* 2+30 bit Fractional number */
	unsigned int	delta;		/* mix of GMT delta and DLS */
};

/*
 * /dev/nvram ioctls
 *
 * Note that PMAC_NVRAM_GET_OFFSET is still supported, but is
 * definitely obsolete. Do not use it if you can avoid it
 */

#define OBSOLETE_PMAC_NVRAM_GET_OFFSET \
				_IOWR('p', 0x40, int)

#define IOC_NVRAM_GET_OFFSET	_IOWR('p', 0x42, int)	/* Get NVRAM partition offset */
#define IOC_NVRAM_SYNC		_IO('p', 0x43)		/* Sync NVRAM image */

#endif /* _UAPI_ASM_POWERPC_NVRAM_H */

Annotation

• Detected declarations: `struct pmac_machine_location`.
• Atlas domain: Architecture Layer / arch/powerpc.
• 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.