arch/x86/platform/intel-mid/pwr.c

File Facts

System

Linux kernel

Corpus path

arch/x86/platform/intel-mid/pwr.c

Extension

.c

Size

11408 bytes

Lines

486

Domain

Architecture Layer

Bucket

arch/x86

Inferred role

Architecture Layer: operation-table or driver-model contract

Status

pattern 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 an operation table; this is where Linux turns generic core objects into subsystem-specific behavior.
• Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.
• Touches IRQ or DMA behavior; this matters for the representative real-device path.
• 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/delay.h
• linux/errno.h
• linux/interrupt.h
• linux/kernel.h
• linux/export.h
• linux/mutex.h
• linux/pci.h
• asm/intel-mid.h

Detected Declarations

• struct mid_pwr_dev
• struct mid_pwr
• struct mid_pwr_device_info
• function mid_pwr_get_state
• function mid_pwr_set_state
• function mid_pwr_set_wake
• function mid_pwr_interrupt_disable
• function mid_pwr_is_busy
• function mid_pwr_wait
• function mid_pwr_wait_for_cmd
• function __update_power_state
• function __find_weakest_power_state
• function __set_power_state
• function mid_pwr_set_power_state
• function intel_mid_pci_set_power_state
• function intel_mid_pci_get_power_state
• function intel_mid_pwr_power_off
• function intel_mid_pwr_get_lss_id
• function mid_pwr_irq_handler
• function mid_pwr_probe
• function mid_set_initial_state
• function pnw_set_initial_state
• function tng_set_initial_state

Annotated Snippet

static struct pci_driver mid_pwr_pci_driver = {
	.name		= "intel_mid_pwr",
	.probe		= mid_pwr_probe,
	.id_table	= mid_pwr_pci_ids,
};

builtin_pci_driver(mid_pwr_pci_driver);

Annotation

• Immediate include surface: `linux/delay.h`, `linux/errno.h`, `linux/interrupt.h`, `linux/kernel.h`, `linux/export.h`, `linux/mutex.h`, `linux/pci.h`, `asm/intel-mid.h`.
• Detected declarations: `struct mid_pwr_dev`, `struct mid_pwr`, `struct mid_pwr_device_info`, `function mid_pwr_get_state`, `function mid_pwr_set_state`, `function mid_pwr_set_wake`, `function mid_pwr_interrupt_disable`, `function mid_pwr_is_busy`, `function mid_pwr_wait`, `function mid_pwr_wait_for_cmd`.
• Atlas domain: Architecture Layer / arch/x86.
• Implementation status: pattern implementation candidate.
• Synchronization appears in or near this file; preserve lock ordering, sleepability, and interrupt-context constraints.
• IRQ or DMA behavior appears here, which is relevant to the selected PCIe/NVMe device path.

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.