arch/arm/mach-shmobile/platsmp.c

Source file repositories/reference/linux-study-clean/arch/arm/mach-shmobile/platsmp.c

File Facts

System
Linux kernel
Corpus path
arch/arm/mach-shmobile/platsmp.c
Extension
.c
Size
851 bytes
Lines
36
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.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0
/*
 * SMP support for R-Mobile / SH-Mobile
 *
 * Copyright (C) 2010  Magnus Damm
 * Copyright (C) 2011  Paul Mundt
 *
 * Based on vexpress, Copyright (C) 2002 ARM Ltd, All Rights Reserved
 */
#include <linux/init.h>
#include <asm/cacheflush.h>
#include <asm/smp_plat.h>
#include "common.h"

extern unsigned long shmobile_smp_fn[];
extern unsigned long shmobile_smp_arg[];
extern unsigned long shmobile_smp_mpidr[];

void shmobile_smp_hook(unsigned int cpu, unsigned long fn, unsigned long arg)
{
	shmobile_smp_fn[cpu] = 0;
	flush_cache_all();

	shmobile_smp_mpidr[cpu] = cpu_logical_map(cpu);
	shmobile_smp_fn[cpu] = fn;
	shmobile_smp_arg[cpu] = arg;
	flush_cache_all();
}

#ifdef CONFIG_HOTPLUG_CPU
bool shmobile_smp_cpu_can_disable(unsigned int cpu)
{
	return true; /* Hotplug of any CPU is supported */
}
#endif

Annotation

Implementation Notes