arch/mips/sni/a20r.c
Source file repositories/reference/linux-study-clean/arch/mips/sni/a20r.c
File Facts
- System
- Linux kernel
- Corpus path
arch/mips/sni/a20r.c- Extension
.c- Size
- 5302 bytes
- Lines
- 257
- Domain
- Architecture Layer
- Bucket
- arch/mips
- 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.
- Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.
Dependency Surface
linux/init.hlinux/interrupt.hlinux/irq.hlinux/platform_device.hlinux/serial_8250.hasm/sni.hasm/time.hlinux/platform_data/serial-sccnxp.h
Detected Declarations
function a20r_update_cause_ipfunction unmask_a20r_irqfunction mask_a20r_irqfunction a20r_hwintfunction sni_a20r_irq_initfunction sni_a20r_initmodule init snirm_a20r_setup_devinit
Annotated Snippet
device_initcall(snirm_a20r_setup_devinit);Annotation
- Immediate include surface: `linux/init.h`, `linux/interrupt.h`, `linux/irq.h`, `linux/platform_device.h`, `linux/serial_8250.h`, `asm/sni.h`, `asm/time.h`, `linux/platform_data/serial-sccnxp.h`.
- Detected declarations: `function a20r_update_cause_ip`, `function unmask_a20r_irq`, `function mask_a20r_irq`, `function a20r_hwint`, `function sni_a20r_irq_init`, `function sni_a20r_init`, `module init snirm_a20r_setup_devinit`.
- Atlas domain: Architecture Layer / arch/mips.
- 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.