arch/powerpc/math-emu/mffs.c

File Facts

System

Linux kernel

Corpus path

arch/powerpc/math-emu/mffs.c

Extension

.c

Size

320 bytes

Lines

20

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

• linux/types.h
• linux/errno.h
• linux/uaccess.h
• asm/sfp-machine.h
• math-emu/soft-fp.h

Detected Declarations

• function mffs

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/uaccess.h>

#include <asm/sfp-machine.h>
#include <math-emu/soft-fp.h>

int
mffs(u32 *frD)
{
	frD[1] = __FPU_FPSCR;

#ifdef DEBUG
	printk("%s: frD %p: %08x.%08x\n", __func__, frD, frD[0], frD[1]);
#endif

	return 0;
}

Annotation

• Immediate include surface: `linux/types.h`, `linux/errno.h`, `linux/uaccess.h`, `asm/sfp-machine.h`, `math-emu/soft-fp.h`.
• Detected declarations: `function mffs`.
• 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.