1// SPDX-License-Identifier: GPL-2.0
 2//
 3// Copyright (c) 2009-2011 Samsung Electronics Co., Ltd.
 4//		http://www.samsung.com
 5//
 6// Samsung CPU Support
 7
 8#include <linux/module.h>
 9#include <linux/kernel.h>
10#include <linux/init.h>
11#include <linux/io.h>
12
13#include "map-base.h"
14#include "cpu.h"
15
16unsigned long samsung_cpu_id;
17
18void __init s3c64xx_init_cpu(void)
19{
20	samsung_cpu_id = readl_relaxed(S3C_VA_SYS + 0x118);
21	if (!samsung_cpu_id) {
22		/*
23		 * S3C6400 has the ID register in a different place,
24		 * and needs a write before it can be read.
25		 */
26		writel_relaxed(0x0, S3C_VA_SYS + 0xA1C);
27		samsung_cpu_id = readl_relaxed(S3C_VA_SYS + 0xA1C);
28	}
29
30	pr_info("Samsung CPU ID: 0x%08lx\n", samsung_cpu_id);
31	pr_err("The platform is deprecated and scheduled for removal. Please reach to the maintainers of the platform and linux-samsung-soc@vger.kernel.org if you still use it.  Without such feedback, the platform will be removed after 2022.\n");
32}