arch/powerpc/platforms/pseries/pseries_energy.c

File Facts

System

Linux kernel

Corpus path

arch/powerpc/platforms/pseries/pseries_energy.c

Extension

.c

Size

8682 bytes

Lines

370

Domain

Architecture Layer

Bucket

arch/powerpc

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

Dependency Surface

• linux/module.h
• linux/types.h
• linux/errno.h
• linux/init.h
• linux/seq_file.h
• linux/sysfs.h
• linux/device.h
• linux/cpu.h
• linux/of.h
• asm/cputhreads.h
• asm/page.h
• asm/hvcall.h
• asm/firmware.h
• asm/prom.h

Detected Declarations

• function cpu_to_drc_index
• function drc_index_to_cpu
• function get_best_energy_list
• function get_best_energy_data
• function cpu_activate_hint_list_show
• function cpu_deactivate_hint_list_show
• function percpu_activate_hint_show
• function percpu_deactivate_hint_show
• function pseries_energy_init
• function for_each_possible_cpu
• function pseries_energy_cleanup
• function for_each_possible_cpu
• module init pseries_energy_init

Annotated Snippet

module_init(pseries_energy_init);
module_exit(pseries_energy_cleanup);
MODULE_DESCRIPTION("Driver for pSeries platform energy management");
MODULE_AUTHOR("Vaidyanathan Srinivasan");
MODULE_LICENSE("GPL");

Annotation

• Immediate include surface: `linux/module.h`, `linux/types.h`, `linux/errno.h`, `linux/init.h`, `linux/seq_file.h`, `linux/sysfs.h`, `linux/device.h`, `linux/cpu.h`.
• Detected declarations: `function cpu_to_drc_index`, `function drc_index_to_cpu`, `function get_best_energy_list`, `function get_best_energy_data`, `function cpu_activate_hint_list_show`, `function cpu_deactivate_hint_list_show`, `function percpu_activate_hint_show`, `function percpu_deactivate_hint_show`, `function pseries_energy_init`, `function for_each_possible_cpu`.
• Atlas domain: Architecture Layer / arch/powerpc.
• Implementation status: integration 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.