arch/powerpc/kernel/pci-common.c

File Facts

System

Linux kernel

Corpus path

arch/powerpc/kernel/pci-common.c

Extension

.c

Size

47546 bytes

Lines

1740

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.
• 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/kernel.h
• linux/pci.h
• linux/string.h
• linux/init.h
• linux/delay.h
• linux/export.h
• linux/of_address.h
• linux/of_pci.h
• linux/mm.h
• linux/shmem_fs.h
• linux/list.h
• linux/syscalls.h
• linux/irq.h
• linux/vmalloc.h
• linux/slab.h
• linux/vgaarb.h
• linux/numa.h
• linux/msi.h
• linux/irqdomain.h
• asm/processor.h
• asm/io.h
• asm/pci-bridge.h
• asm/byteorder.h
• asm/machdep.h
• asm/ppc-pci.h
• asm/eeh.h
• asm/setup.h
• ../../../drivers/pci/pci.h

Detected Declarations

• struct pci_intx_virq
• function set_pci_dma_ops
• function get_phb_number
• function pcibios_free_controller
• function pci_create_root_bus
• function pcibios_window_alignment
• function pcibios_setup_bridge
• function pcibios_reset_secondary_bus
• function pcibios_default_alignment
• function pcibios_iov_resource_alignment
• function pcibios_sriov_enable
• function pcibios_sriov_disable
• function pcibios_io_size
• function pcibios_vaddr_is_ioport
• function pci_address_to_pio
• function pci_domain_nr
• function pci_find_hose_for_OF_device
• function ppc_pci_intx_release
• function ppc_pci_unmap_irq_line
• function list_for_each_entry
• function ppc_pci_register_irq_notifier
• function pci_read_irq_line
• function pci_iobar_pfn
• function pci_phys_mem_access_prot
• function pci_legacy_read
• function pci_legacy_write
• function pci_mmap_legacy_page_range
• function pci_resource_to_user
• function pci_process_bridge_OF_ranges
• function pci_proc_domain
• function pcibios_root_bridge_prepare
• function pcibios_fixup_resources
• function pci_dev_for_each_resource
• function pcibios_uninitialized_bridge_resource
• function pcibios_fixup_bridge
• function pci_bus_for_each_resource
• function pcibios_setup_bus_self
• function pcibios_bus_add_device
• function pcibios_device_add
• function pcibios_set_master
• function skip_isa_ioresource_align
• function pcibios_align_resource
• function reparent_resources
• function pcibios_allocate_bus_resources
• function pci_bus_for_each_resource
• function alloc_resource
• function request_resource
• function pcibios_allocate_resources

Annotated Snippet

core_initcall(discover_phbs);

Annotation

• Immediate include surface: `linux/kernel.h`, `linux/pci.h`, `linux/string.h`, `linux/init.h`, `linux/delay.h`, `linux/export.h`, `linux/of_address.h`, `linux/of_pci.h`.
• Detected declarations: `struct pci_intx_virq`, `function set_pci_dma_ops`, `function get_phb_number`, `function pcibios_free_controller`, `function pci_create_root_bus`, `function pcibios_window_alignment`, `function pcibios_setup_bridge`, `function pcibios_reset_secondary_bus`, `function pcibios_default_alignment`, `function pcibios_iov_resource_alignment`.
• Atlas domain: Architecture Layer / arch/powerpc.
• Implementation status: integration 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.