| Olivier Deprez | 157378f | 2022-04-04 15:47:50 +0200 | [diff] [blame^] | 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 <mach/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 | } |