arch/powerpc/include/asm/hvconsole.h

File Facts

System

Linux kernel

Corpus path

arch/powerpc/include/asm/hvconsole.h

Extension

.h

Size

800 bytes

Lines

32

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.

Dependency Surface

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

Detected Declarations

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

Annotated Snippet

#ifndef _PPC64_HVCONSOLE_H
#define _PPC64_HVCONSOLE_H
#ifdef __KERNEL__

/*
 * PSeries firmware will only send/recv up to 16 bytes of character data per
 * hcall.
 */
#define MAX_VIO_PUT_CHARS	16
#define SIZE_VIO_GET_CHARS	16

/*
 * Vio firmware always attempts to fetch MAX_VIO_GET_CHARS chars.  The 'count'
 * parm is included to conform to put_chars() function pointer template
 */
extern ssize_t hvc_get_chars(uint32_t vtermno, u8 *buf, size_t count);
extern ssize_t hvc_put_chars(uint32_t vtermno, const u8 *buf, size_t count);

/* Provided by HVC VIO */
void hvc_vio_init_early(void);

#endif /* __KERNEL__ */
#endif /* _PPC64_HVCONSOLE_H */

Annotation

• 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.