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