arch/mips/loongson2ef/common/platform.c

Source file repositories/reference/linux-study-clean/arch/mips/loongson2ef/common/platform.c

File Facts

System
Linux kernel
Corpus path
arch/mips/loongson2ef/common/platform.c
Extension
.c
Size
657 bytes
Lines
28
Domain
Architecture Layer
Bucket
arch/mips
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-or-later
/*
 * Copyright (C) 2009 Lemote Inc.
 * Author: Wu Zhangjin, wuzhangjin@gmail.com
 */

#include <linux/err.h>
#include <linux/smp.h>
#include <linux/platform_device.h>

static struct platform_device loongson2_cpufreq_device = {
	.name = "loongson2_cpufreq",
	.id = -1,
};

static int __init loongson2_cpufreq_init(void)
{
	struct cpuinfo_mips *c = &current_cpu_data;

	/* Only 2F revision and its successors support CPUFreq */
	if ((c->processor_id & PRID_REV_MASK) >= PRID_REV_LOONGSON2F)
		return platform_device_register(&loongson2_cpufreq_device);

	return -ENODEV;
}

arch_initcall(loongson2_cpufreq_init);

Annotation

Implementation Notes