arch/powerpc/platforms/8xx/cpm1-ic.c
Source file repositories/reference/linux-study-clean/arch/powerpc/platforms/8xx/cpm1-ic.c
File Facts
- System
- Linux kernel
- Corpus path
arch/powerpc/platforms/8xx/cpm1-ic.c- Extension
.c- Size
- 4342 bytes
- Lines
- 189
- 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.
- 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/kernel.hlinux/interrupt.hlinux/irqdomain.hlinux/platform_device.hasm/cpm1.h
Detected Declarations
struct cpm_pic_datafunction cpm_mask_irqfunction cpm_unmask_irqfunction cpm_end_irqfunction cpm_get_irqfunction cpm_cascadefunction cpm_pic_host_mapfunction cpm_pic_probefunction cpm_pic_initfunction cpm_error_interruptfunction cpm_error_probefunction cpm_error_initmodule init cpm_error_init
Annotated Snippet
subsys_initcall(cpm_error_init);Annotation
- Immediate include surface: `linux/kernel.h`, `linux/interrupt.h`, `linux/irqdomain.h`, `linux/platform_device.h`, `asm/cpm1.h`.
- Detected declarations: `struct cpm_pic_data`, `function cpm_mask_irq`, `function cpm_unmask_irq`, `function cpm_end_irq`, `function cpm_get_irq`, `function cpm_cascade`, `function cpm_pic_host_map`, `function cpm_pic_probe`, `function cpm_pic_init`, `function cpm_error_interrupt`.
- Atlas domain: Architecture Layer / arch/powerpc.
- Implementation status: integration implementation candidate.
- 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.