arch/powerpc/platforms/44x/hsta_msi.c
Source file repositories/reference/linux-study-clean/arch/powerpc/platforms/44x/hsta_msi.c
File Facts
- System
- Linux kernel
- Corpus path
arch/powerpc/platforms/44x/hsta_msi.c- Extension
.c- Size
- 4775 bytes
- Lines
- 208
- 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/msi.hlinux/of.hlinux/of_irq.hlinux/platform_device.hlinux/pci.hlinux/semaphore.hasm/msi_bitmap.hasm/ppc-pci.h
Detected Declarations
struct ppc4xx_hsta_msifunction hsta_setup_msi_irqsfunction msi_for_each_descfunction hsta_find_hwirq_offsetfunction hsta_teardown_msi_irqsfunction msi_for_each_descfunction hsta_msi_probefunction list_for_each_entryfunction hsta_msi_initmodule init hsta_msi_init
Annotated Snippet
subsys_initcall(hsta_msi_init);Annotation
- Immediate include surface: `linux/kernel.h`, `linux/interrupt.h`, `linux/msi.h`, `linux/of.h`, `linux/of_irq.h`, `linux/platform_device.h`, `linux/pci.h`, `linux/semaphore.h`.
- Detected declarations: `struct ppc4xx_hsta_msi`, `function hsta_setup_msi_irqs`, `function msi_for_each_desc`, `function hsta_find_hwirq_offset`, `function hsta_teardown_msi_irqs`, `function msi_for_each_desc`, `function hsta_msi_probe`, `function list_for_each_entry`, `function hsta_msi_init`, `module init hsta_msi_init`.
- 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.