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
16 unsigned long samsung_cpu_id;
17
18 void __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 }
33
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TOMOYO® is a registered trademark of NTT DATA CORPORATION.