drivers/soc/renesas/r9a06g032-smp.c

File Facts

System

Linux kernel

Corpus path

drivers/soc/renesas/r9a06g032-smp.c

Extension

.c

Size

2411 bytes

Lines

97

Domain

Driver Families

Bucket

drivers/soc

Inferred role

Driver Families: implementation source

Status

source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

• Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.
• Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/io.h
• linux/of.h
• linux/of_address.h
• linux/smp.h

Detected Declarations

• function r9a06g032_smp_boot_secondary
• function r9a06g032_smp_prepare_cpus

Annotated Snippet

if (dns == sizeof(u64)) {
			u64 temp;

			ret = of_property_read_u64(dn,
						   "cpu-release-addr", &temp);
			bootaddr = temp;
		} else {
			ret = of_property_read_u32(dn,
						   "cpu-release-addr",
						   &bootaddr);
		}
	}
	of_node_put(dn);
	if (ret) {
		pr_err("CPU#1: invalid cpu-release-addr property\n");
		return;
	}
	pr_info("CPU#1: cpu-release-addr %08x\n", bootaddr);

	cpu_bootaddr = ioremap(bootaddr, sizeof(bootaddr));
}

static const struct smp_operations r9a06g032_smp_ops __initconst = {
	.smp_prepare_cpus = r9a06g032_smp_prepare_cpus,
	.smp_boot_secondary = r9a06g032_smp_boot_secondary,
};

CPU_METHOD_OF_DECLARE(r9a06g032_smp,
		      "renesas,r9a06g032-smp", &r9a06g032_smp_ops);

Annotation

• Immediate include surface: `linux/io.h`, `linux/of.h`, `linux/of_address.h`, `linux/smp.h`.
• Detected declarations: `function r9a06g032_smp_boot_secondary`, `function r9a06g032_smp_prepare_cpus`.
• Atlas domain: Driver Families / drivers/soc.
• Implementation status: source implementation candidate.
• Synchronization appears in or near this file; preserve lock ordering, sleepability, and interrupt-context constraints.

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.