arch/sh/kernel/cpu/sh4/sq.c

File Facts

System

Linux kernel

Corpus path

arch/sh/kernel/cpu/sh4/sq.c

Extension

.c

Size

9553 bytes

Lines

414

Domain

Architecture Layer

Bucket

arch/sh

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.
• Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.
• Allocates kernel memory; connect allocation flags and lifetime to context constraints.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/init.h
• linux/cpu.h
• linux/bitmap.h
• linux/device.h
• linux/kernel.h
• linux/module.h
• linux/slab.h
• linux/vmalloc.h
• linux/mm.h
• linux/io.h
• linux/prefetch.h
• asm/page.h
• asm/cacheflush.h
• cpu/sq.h

Detected Declarations

• struct sq_mapping
• struct sq_mapping
• struct sq_sysfs_attr
• function sq_flush_range
• function sq_mapping_list_add
• function sq_mapping_list_del
• function __sq_remap
• function sq_remap
• function sq_remap
• function sq_sysfs_show
• function sq_sysfs_store
• function mapping_show
• function mapping_store
• function sq_dev_add
• function sq_dev_remove
• function sq_api_init
• function sq_api_exit
• module init sq_api_init
• export sq_flush_range
• export sq_remap
• export sq_unmap

Annotated Snippet

module_init(sq_api_init);
module_exit(sq_api_exit);

MODULE_AUTHOR("Paul Mundt <lethal@linux-sh.org>, M. R. Brown <mrbrown@0xd6.org>");
MODULE_DESCRIPTION("Simple API for SH-4 integrated Store Queues");
MODULE_LICENSE("GPL");

Annotation

• Immediate include surface: `linux/init.h`, `linux/cpu.h`, `linux/bitmap.h`, `linux/device.h`, `linux/kernel.h`, `linux/module.h`, `linux/slab.h`, `linux/vmalloc.h`.
• Detected declarations: `struct sq_mapping`, `struct sq_mapping`, `struct sq_sysfs_attr`, `function sq_flush_range`, `function sq_mapping_list_add`, `function sq_mapping_list_del`, `function __sq_remap`, `function sq_remap`, `function sq_remap`, `function sq_sysfs_show`.
• Atlas domain: Architecture Layer / arch/sh.
• Implementation status: integration implementation candidate.
• Synchronization appears in or near this file; preserve lock ordering, sleepability, and interrupt-context constraints.

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.