arch/arm/mach-alpine/platsmp.c
Source file repositories/reference/linux-study-clean/arch/arm/mach-alpine/platsmp.c
File Facts
- System
- Linux kernel
- Corpus path
arch/arm/mach-alpine/platsmp.c- Extension
.c- Size
- 941 bytes
- Lines
- 41
- Domain
- Architecture Layer
- Bucket
- arch/arm
- Inferred role
- Architecture Layer: implementation source
- Status
- source 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.
- Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.
Dependency Surface
linux/init.hlinux/errno.hlinux/io.hlinux/of.hasm/smp_plat.halpine_cpu_pm.h
Detected Declarations
function Copyrightfunction alpine_smp_prepare_cpus
Annotated Snippet
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* SMP operations for Alpine platform.
*
* Copyright (C) 2015 Annapurna Labs Ltd.
*/
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/io.h>
#include <linux/of.h>
#include <asm/smp_plat.h>
#include "alpine_cpu_pm.h"
static int alpine_boot_secondary(unsigned int cpu, struct task_struct *idle)
{
phys_addr_t addr;
addr = __pa_symbol(secondary_startup);
if (addr > (phys_addr_t)(uint32_t)(-1)) {
pr_err("FAIL: resume address over 32bit (%pa)", &addr);
return -EINVAL;
}
return alpine_cpu_wakeup(cpu_logical_map(cpu), (uint32_t)addr);
}
static void __init alpine_smp_prepare_cpus(unsigned int max_cpus)
{
alpine_cpu_pm_init();
}
static const struct smp_operations alpine_smp_ops __initconst = {
.smp_prepare_cpus = alpine_smp_prepare_cpus,
.smp_boot_secondary = alpine_boot_secondary,
};
CPU_METHOD_OF_DECLARE(alpine_smp, "al,alpine-smp", &alpine_smp_ops);
Annotation
- Immediate include surface: `linux/init.h`, `linux/errno.h`, `linux/io.h`, `linux/of.h`, `asm/smp_plat.h`, `alpine_cpu_pm.h`.
- Detected declarations: `function Copyright`, `function alpine_smp_prepare_cpus`.
- Atlas domain: Architecture Layer / arch/arm.
- Implementation status: source implementation candidate.
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.